• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An air jet type loom has a piping system connected to an air supply source through an air supply valve. The pipeline system consists of a main tank, a secondary tank, two electro-pneumatic regulators and a pressure gauge. The system stops the air jet type loom, closes the air supply valve and stops the pressure adjustment via the pressure adjusters, measuring the pressure in the piping system to detect an air leak in the piping system.
    公开号:BE1022163B1
    申请号:E2014/0703
    申请日:2014-09-18
    公开日:2016-02-22
    发明作者:Yoichi Makino；Sawaki Masaaki
    申请人:Kabushiki Kaisha Toyota Jidoshokki；
    IPC主号:
    专利说明:

    METHOD FOR DETECTING AN AIR LEAK IN A WEAVING
    A JET OF AIR
    BASIS OF THE INVENTION
    The present invention relates to a method of detecting an air leak in a pipeline system for compressed air in an air jet type loom.
    Air leakage may occur in a ducting system of an air jet type loom due to a break in a room such as a valve or duct in the ducting system in which flows from compressed air or due to a mounting failure or improper adjustment of the piping system. When any such air leakage occurs in the piping system, compressed air consumption increases in the weft insertion operation and unused compressed air is evacuated from the piping system. for reasons other than the insertion of the weft thread, which opens the way to a waste of energy. The air leak in the piping system can reduce the flow or pressionα pressure of the compressed air more than necessary, thereby affecting the insertion performance of the weft yarn, which complicates its task of operating the system. continuous air jet loom.
    Japanese patent application publication 2013-83016 discloses a method of detecting an air leak in a pipeline system for compressed air in an air jet type loom in order to to prevent troubles in the air jet type loom which are associated with air leakage. In the air jet loom of this publication, a line connected to an air supply source is connected to a line of the air jet type loom via a feed valve. air that allows or blocks the supply of compressed air from the air supply source. The air jet type loom includes the air supply valve and a first pressure gauge that measures the initial pressure of the compressed air supplied from the air supply source. A first air supply line is provided downstream of the first pressure gauge and includes a main regulator, a main reservoir, a main valve and a main nozzle. A second air supply line is provided downstream of the first pressure gauge and includes a secondary regulator, a secondary reservoir, secondary valves and secondary nozzle groups. The air supply valve, the first air supply line and the second air supply line cooperate to form the line system for the compressed air. The main tank and the secondary tank are provided with a second and a third pressure gauge, respectively.
    In accordance with the prior art air leak detection method set forth above, when the air jet type loom is shut down, the air supply valve is closed. to stop the supply of compressed air from the air supply source and then the change in the initial pressure of the compressed air supplied from the air supply source , the change with regard to the main pressure of the compressed air stored in the main tank and the change with regard to the secondary pressure of the compressed air stored in the secondary tank are measured by the first pressure gauge, by the second pressure gauge and the third pressure gauge, respectively. These pressure changes are measured over time and the measurement results are compared to pre-established pressure change models. When any of the measurement results and its corresponding pattern of preset pressure change differ from each other, the presence of an air leak in the first or second supply line of the same is determined. air. Therefore, necessary steps can be taken to suppress the air leak.
    The function of the main regulator is to maintain the compressed air in the main tank under a constant pressure and the secondary regulator also has the function of maintaining the compressed air in the secondary tank under a constant pressure. In general, a manual regulator is used for the main regulator and the secondary regulator. In the case of a manual regulator, when the supply of compressed air from the air supply source is stopped and the breeze supply is also stopped, the pressures of the remaining compressed air in the pipeline system change over time as can be seen in Figure 6A. More specifically, the initial pressure measured by the first pressure gauge shows a rapid reduction from the PI value over time, as represented by the dotted line LU. The main pressure measured by the second pressure gauge remains unchanged at the value P2 over time, as represented by the dashed line L12. After reducing the initial pressure to a pressure that is equal to the main pressure, the compressed air in the pipeline system is maintained essentially at the pressure P2, as represented by the dotted line L13. Therefore, as described in the publication in question, an air leak can be detected by measuring the pressure changes of the compressed air in the piping system via the pressure gauges after stopping the supply of air. compressed air from the air supply source.
    However, an electropneumatic regulator that electrically controls the pressure of the compressed air in an automatic manner can be used in the piping system of the air jet type loom to replace the manual regulator. The electro-pneumatic controller is configured to control the pressure of the compressed air even after shutting down the air-jet loom and stopping the supply of compressed air from the air supply source.
    The electropneumatic regulator is configured to implement a pressure adjustment such that the pressure of the compressed air flowing through the regulator reaches a preset target pressure by supplying compressed air to an adjuster. pneumatic spring type pressure and releasing the compressed air into the air spring type and compressed air pressure control device at the output side of the electro-pneumatic controller from the electropneumatic regulator. When the supply of compressed air from the air supply source is stopped and when the breeze supply is stopped, the pressures of the compressed air that remain in the piping system undergo changes at the same time. over time, as shown in Figure 6B. More specifically, the initial pressure measured by the first pressure gauge shows a rapid reduction from the PI value over time, as represented by the solid line L21. The initial pressure measured by the second pressure gauge is reduced from the value P2 over time, as represented by the solid line L22. After the reduction of the initial pressure measured by the first pressure gauge to a pressure which is equal to the main pressure measured by the second pressure gauge, the compressed air in the pipeline system is subsequently reduced during the time, as represented by the solid line L23. Since the electropneumatic regulator continues to adjust the pressure on the pneumatic spring type pressure control device even after the air jet type loom has been shut down, the release of the compressed air from the electropneumatic regulator takes place intermittently. In this case, the pressure of the compressed air in the piping system tends to be reduced in the same manner as in the case where a manual regulator is used. Therefore, when the air jet type loom that uses the electropneumatic regulator; for the pipeline system uses the same reference value (or the same threshold value) as in the case where the manual regulator is used, an air leak will be detected incorrectly, even in the absence of a leak of air in the pipeline system.
    It is an object of the present invention to provide a method of accurately detecting air leakage in an air jet type loom which includes an electropneumatic regulator.
    SUMMARY OF THE INVENTION
    In accordance with one aspect of the present invention, there is provided a method of detecting an air leak in an air jet type loom. The air jet loom has a piping system that is connected to an air supply source via an air supply valve and via a conduit. The pipeline system includes a main nozzle, a main tank, a secondary nozzle, a secondary tank, two electropneumatic regulators - and a pressure gauge. Electropneumatic controllers have pneumatic spring type pressure control devices. The main tank is connected to the air supply via one of the electropneumatic controllers and via the air supply valve to store the compressed air to be fed to the main nozzle. The secondary tank is connected to the air supply via the other electro-pneumatic controller and via the air supply valve to store the compressed air to be supplied to the secondary nozzle. The method is characterized by shutting down the air jet loom, closing the air supply valve and stopping the pressure setting via the pressure control devices. of the pneumatic spring type, electropneumatic regulators, while measuring the pressure in the pipeline system via the pressure gauge to detect air leakage in the pipeline system. Other aspects and advantages of the invention will become apparent from the following description when taken in conjunction with the accompanying drawings which illustrate by way of example the principles of the invention.
    BRIEF DESCRIPTION OF THE DRAWINGS The invention, together with its objects and advantages, can be best understood by reference to the following description of the embodiments of the present invention together with the accompanying drawings in which:
    Figure 1 is a block diagram showing a pipeline system for compressed air of an air jet type loom.
    FIG. 2 is a schematic diagram showing an electropneumatic regulator of the pipe system of FIG. 1.
    Figure 3 is a view of a display panel of a control panel, which explains the procedure for detecting an air leak.
    Fig. 4 is a view of a display screen of the control panel showing the results of detecting an air leak in the absence of an air leak. <
    Fig. 5 is a view of a display panel of the control panel, showing the results of the detection of an air leak in the presence of an air leak.
    Fig. 6A is a graph showing pressure changes of a pipeline system that includes a manual regulator.
    Fig. 6B is a graph showing pressure changes of a pipeline system that includes an electropneumatic regulator.
    DETAILED DESCRIPTION OF THE EMBODIMENTS
    Hereinafter, an embodiment of the present invention is described with reference to Figs. 1 to 5. Referring to Fig. 1 showing a block diagram of a pipeline system 2 for compressed air in a weft insertion device of an air jet type loom 1, an air supply source is designated by the reference numeral 3 and includes an air compressor ( not shown) and a drying device (also not shown). The air supply source 3 is configured to feed compressed air to several air jet type looms, one of which is shown in FIG. 1, via respective ducts 4 (only one being shown in FIG. figure 1). The air supply source 3 and the air jet type looms are mounted in a weaving mill. The air supply source 3 is connected via line 4 to an air supply valve 5 which allows or blocks the supply of compressed air.
    The air supply valve 5 is connected to the filter 7 via a pipe 6. The filter 7 is connected via a line 6 to a pressure gauge 8 which measures the initial pressure (see FIG. 4) of the compressed air supplied from the air supply source 3. The initial pressure P1 is set to be greater than the pressure of the compressed air which is used to insert the weft yarn into the loom I of the type with air jet. The pressure gauge 8 is connected to an electropneumatic regulator 9 via a line 6. The electropneumatic regulator 9 is connected to a main tank 10 via a line 6. The main tank 10 is equipped with a pressure gauge 11.
    The electro-pneumatic regulator 9 sets the initial pressure P1 of the compressed air at the main pressure P2 (as can be seen in FIG. 4) which is suitable for the insertion of the weft yarn and the compressed air whose pressure has been set at the main pressure P2 is stored in the main tank 10. It should be indicated that the main pressure P2 is set to be lower than the initial pressure P1. The pressure gauge 11 measures the pressure of the compressed air stored in the main tank 10 and verifies whether the pressure of the compressed air is set to the main pressure P2. The main tank 10 is connected to a main valve 12 via a pipe 6. The main valve 12 is connected to a main nozzle 13 via a pipe 6. The main valve 12 allows or blocks the supply of compressed air to the the main nozzle 13.
    The pipe 6 which connects the pressure gauge 8 and the electro-pneumatic regulator 9 is connected to a throttling valve 15 via a pipe 14. The throttling valve 15 is connected via a pipe 14 to the pipe 6 which connects the main valve. 12 and the main nozzle 13. These lines 14 and the throttle valve 15 cooperate to form a breeze supply member. As a result, a small amount of compressed air flowing through the throttle valve 15 is fed from the main nozzle 13 steadily even when stopping the insertion of the weft thread. The main nozzle 13 distributes a breeze steadily, even when stopping the insertion of the weft yarn, so that the leading end of the weft yarn is maintained under stable conditions.
    Moreover, the pipe 6 which connects the pressure gauge 8 and the electropneumatic regulator 9 is connected to an electropneumatic regulator 17 via a pipe 16. The electropneumatic regulator 17 has the same structure and the same function as those of the electropneumatic regulator 9. The electropneumatic regulator 17 is connected to a secondary reservoir 18 via a pipe 16. The secondary reservoir 18 is provided with a pressure gauge 19. The electropneumatic regulator 17 regulates the initial pressure P1 of the compressed air supplied by the supply source of air 3 at a secondary pressure P3 (as can be seen in FIG. 4) which is suitable for the insertion of the weft thread and the compressed air whose pressure has been set at the secondary pressure P3 is stored in the secondary tank 18. It should be indicated that the secondary pressure P3 is set to be lower than the initial pressure PI and to be id entique at the main pressure P2.
    Four secondary valves 20 are arranged in the insertion direction of the weft thread and are connected to the secondary reservoir 18 via lines 16. Four groups of secondary nozzles 21 are arranged in the direction of insertion of the weft thread and each group has Three secondary nozzles 21. The secondary valves 20 are provided for the respective groups of secondary nozzles 21. The three secondary nozzles 21 of each group are connected to their corresponding secondary valves 20 via lines 16. Whenever the secondary valve 20 is actuated to open, the compressed air set to the secondary pressure P3 in the secondary reservoir 18 is fed to its corresponding group of secondary nozzles 21 to support the flight of a weft yarn.
    The pressure gauges 8, 11 and 19 are electrically connected to a controller 23 which has a control panel 22 and transmits to the controller 23 data relating to the measured pressures. The controller 23 has a memory portion (not shown) for storing data relating to the pressures transmitted from the pressure gauges 8, 11 and 19 as well as setpoints, and an operational portion (not shown). ) to be able to perform various calculations based on the pressure data. In addition, the control device 23 has a stopwatch (not shown) for calculating the time corresponding to the pressure measurements by the pressure gauges 8, 11 and 19, and an interruption circuit of the power source (not shown) to interrupt the power supply of the electropneumatic controllers 9, 17. In addition, the controller 23 has various programs which are necessary for the operation of the air jet type loom 1. During the commissioning of the loom 1 of the air jet type, the controller 23 transmits signals to the main valve 12 and the secondary valves 20 to control the start and stop of the insertion. weft thread. Since the electropneumatic regulators 9 and 17 have the same structure, the following description will focus on the structure only of the electropneumatic regulator 9 referred to in FIG. 2. The electropneumatic regulator 9 includes a pressure control device 24 of the pneumatic spring type, a pilot valve 25, an air release valve 26, an electromagnetically operable valve 17 for supplying air and an electromagnetically operable valve 28, for the release of air. The pneumatic spring-type pressure regulating device 24 has a diaphragm 29 disposed in a housing, a primary space 30 formed on one side of the diaphragm 29 and a secondary space 31 formed on the other side of the diaphragm 29. diaphragm 29 moves towards the primary space 30 or towards the secondary space 31 on the basis of the pressure difference between the primary space 30 and the secondary space 31. The primary space 30 is connected to the valves 27 and 28 actuated electromagnetically via a pipe 32. Each of the valves 27 and 28 is electrically connected to the control device 23 and the commissioning of the valves 27 and 28 is controlled by the control device 23. The valve 27 is connected to the air supply source 3 via the lines 33 and 6. When the valve 27 is open, the compressed air which has the initial pressure P1 is fed into the primary space 30 via the pipe 32. The valve 28 has an air release port 34 which is open to the atmosphere. When the valve 28 is opened, the compressed air in the primary space 30 is released via the air release port 34 into the atmosphere.
    The pilot valve 25 of the electropneumatic regulator 9 has an inlet 35 and an outlet 36. The inlet 35 is connected to the air supply source 3 via the pipe 6. The outlet 36 is connected to the main tank 10 via the pipe 6. The pilot valve 25 is connected to the diaphragm 29 of the pneumatic spring type pressure regulating device 24, so that the pilot valve 25 is opened and closed in response to the movement of the diaphragm 29. In a more specific manner when the pressure in the primary space 30 exceeds the pressure in the secondary space 31, the pilot valve 25 is opened and when the pressure in the secondary space 31 reaches or exceeds the pressure in the primary space 30, the pilot valve 25 is closed. When the pilot valve 25 is opened, the compressed air between the pilot valve 25 and the air supply source 3 flows towards the main tank 10. It should be indicated that the pipe 6 connected to the outlet 36 of the pilot valve 25 communicates with the secondary space 31 via a pipe 37.
    The air release valve 26 of the electropneumatic regulator 9 has a line 38 and an air release port 39. The line 38 communicates with the secondary space 31. The air release valve 26 is opened and closed by response to the movement of the diaphragm 29 as was the case for the pilot valve 25. More specifically, when the pressure in the primary space 30 reaches or exceeds the pressure in the secondary space 31, the air release 26 is closed and when the pressure in the secondary space 31 exceeds the pressure in the primary space 30, the air release valve 26 is open to thereby release compressed air into the secondary space 31 or compressed air between the outlet 36 of the pilot valve 25 and the main tank 10, via the pipe 37, the secondary space 31 and the air release orifice 39.
    The pipe 6 connected to the outlet 36 of the pilot valve 25 is provided with a pressure gauge 40 for constantly measuring the pressure of the compressed air in the pipe 6. The pressure gauge 40 is electrically connected to the control device 23 for transmitting the measured pressure data to the controller 23. The pressure of the compressed air to be stored in the main tank 10 is pre-set and the data for such a pressure is stored at the same time. The data relating to the measured pressure transmitted by the pressure gauge 40 are compared with the pressure previously set. The controller 23 transmits control signals to the electromagnetically actuated valves 27 and 28 based on the result of the comparison and selectively controls the operation of the supply of the compressed air to the space. primary 30 and the release of the compressed air in the primary space 30 towards the atmosphere.
    The electropneumatic regulator 9 regulates the pressure in a constant manner so as to maintain the pressure of the compressed air between the outlet 36 of the pilot valve 25 and the main tank 10 at the above-mentioned pressure which has been previously adjusted and which is stored in the control device 23. More specifically, when the pressure in the line 6 between the outlet 36 of the pilot valve 25 and the main tank 10 is less than the set pressure, the control device 23 closes the valve 28 and opens the valve 27. When the valve 27 is open, high pressure compressed air from the air supply source 3 supplies the primary space 30 to thereby move the diaphragm 29 towards the secondary space 31 causing the air release valve 26 to close and the pilot valve 25 to open. The open pilot valve 25 causes the compressed air to flow from the air supply source 3 to the main tank 10 to thereby increase the pressure of the compressed air in the main tank 10.
    When the pressure in the line 6 between the outlet 36 of the pilot valve 25 and the main tank 10 is greater than the set pressure, the control device 23 closes the valve 27 and opens the valve 28 to release the pressure. compressed air in the primary space 30 via the air release port 34. In addition, high pressure compressed air between the outlet 36 of the pilot valve 25 and the main reservoir 10 is supplied to the secondary space 31, so that the diaphragm 29 moves towards the primary space 30 , which makes sure to maintain the pilot valve 25 in the closed state, while opening the valve 26 of release of air. The air release valve 26, in the open state, releases the air between the outlet 36 of the pilot valve 25 and the main reservoir 10 through the air release port 39. in the atmosphere, thereby reducing the pressure of the compressed air in the main tank 10.
    Hereinafter, the method of detecting an air leak in the air jet type loom 1 having the electropneumatic controllers 9 and 17 is described, with reference to FIGS. air leakage is set in the control device 23. When a maneuver operator actuates the control panel 22 after the air jet type loom 1 is turned off, the panel control 22 displays a display screen 41 showing the initial state in an air leak detection mode. The display screen 41 has a display section 42 for the graphs in which the relationship between time and pressure is represented, a start button 43 and a display section 44 for the messages. A preset reference pressure PS appears on the display section 42 for the graphics via a line in dashes and dots for the determination of an air leak. The display section 44 for the messages displays invitation messages such as: "SET MAIN NOZZLE NOZZLE" and "PRESS THE START KEY AND CLOSE THE AIR SUPPLY VALVE".
    On the display screen 41, the maneuver operator actuates the throttle valve 15 of the breeze supply member in accordance with the message displayed on the display section 44 for the messages so that adjusting the breeze of the main nozzle 13 to zero by blocking the breeze supply towards the main nozzle 13. Then, the attendant, at the maneuver presses the start button 43, which makes the device of command 23 generates a control signal to block the connection between the electropneumatic regulators 9, 17 and a power supply, so that the power supply to the electropneumatic regulators 9, 17 is interrupted. When the pressures of the air at different locations in the piping system 2 are measured by the pressure gauges 8, 11, 19 to detect air leaks, the pressure setting via the pressure control devices 24 of the pneumatic spring type, the electropneumatic regulators 9, 17 are shut down, so that an air release due to the pressure control is prevented via the pressure control devices 24 of the pressure type. pneumatic spring.
    Then the maneuver clerk closes the air supply valve 5 to allow the pressure gauges 8, 11, 19 to measure Ια initial pressure, the main pressure and the secondary pressure of the air that remains in the system. of channel 2, respectively, for a predetermined period of time. Based on the measured data, the solid line L3 for the initial pressure and the solid line L4 for the main pressure and the secondary pressure appear on the display section 42 reserved for the graphics, as shown in FIG. a first stage of the measurement of the pressure, air subjected to a relatively high pressure present adjacent to the air supply source 3 flows towards the main reservoir 10 and towards the secondary reservoir 18 via the electropneumatic regulators 9 and 17. As a result, the initial pressure PI is reduced rapidly to reach the main pressure P2 and the secondary pressure P3, as shown in FIG. 4. When the compressed air, whose pressure has been reduced relative to the initial pressure P1 to reach the main pressure P2 and the secondary pressure P3 in the pipe system 2, is maintained at a pressure which is greater than below the reference pressure PS for a predetermined period of time, the controller 23 determines that there is no air leakage in the piping system 2 and therefore the message "NO AIR LEAKAGE" appears on the section display 43 reserved for messages.
    At the end of the operation of detecting an air leak, the maneuvering agent opens the air supply valve 5 for
    I supply compressed air from the air supply source 3 in the duct system 2 of the loom 1 of the air jet type. Then, the pressure gauge 8 measures the pressure of the compressed air in the pipe 6 and transmits to the control device 23 a signal which represents the result of the measurement. When the control device 23 determines, based on the detection signal emitted by the pressure gauge 8, that the pressure of the compressed air in line 6 is returned to the initial pressure P1, the control device 23 connects automatically the electropneumatic regulators 9 and 17 and the power source. The electropneumatic regulators 9 and 17 thus excited start the pressure control of the pressure control devices 24 of the pneumatic spring type, so as to feed the compressed air set at the main pressure 2 towards the main reservoir 10 and the compressed air adjusted to the secondary pressure 3 towards the secondary reservoir 18, respectively. A repetition of these operations completes the preparation for starting the weaving operation of the loom 1 of the air jet type. It should be pointed out that the power supply of the electropneumatic regulators 9 and 17 can be triggered by actuating a start button of the loom 1 of the air jet type.
    Referring to FIG. 5, the solid lines L3, L4, L5 and L6 which indicate the presence of an air leak in the piping system 2 appear on the display section 42 reserved for graphics. The lines L3, L4 and L5 represent the initial pressure, the main pressure and the secondary pressure, respectively in a first stage of the measurement of the pressure. The line L6 represents the pressure of the compressed air in the pipe system 2 after the convergence of the initial pressure, the main pressure and the secondary pressure to obtain essentially the same pressure.
    In the graphs that appear on the display section 42 for the graphics, the main pressure represented by the line L4 is less than the secondary pressure represented by the line L5 at the first stage of the pressure measurement. The initial pressure undergoes a rapid reduction from the value PI, as represented by the line L3, the secondary pressure is reduced from the value P3 as represented by the line L5, and the main pressure undergoes a reduction from the value P2 as represented by the line L4, respectively. As shown in FIG. 5, the pressure, after its conversion as represented by the line 16, is subjected to a subsequent reduction over time to reach a pressure which is lower than the reference pressure PS. The controller 23 determines the presence of a pressure leak in the piping system 2 when the pressure of the compressed air in the piping system 2 falls below the reference pressure PS. In addition, the control device 23 determines the presence of an air leak in the pipe system 2 also when the control device 23 realizes that the main pressure P2 is lower than the secondary pressure P3 in the first stage measuring the pressure. Therefore, the controller 23 determines the presence of an air leak at a location adjacent to the main tank 10.
    The message "PRESENCE OF AIR LEAK (MAIN NOZZLE)" indicating the presence of an air leak adjacent to the main tank 10 appears on the display section 44 reserved for messages. When such a message is displayed on the message display section 44, the operator immediately checks the lines adjacent to the main tank 10 and repairs the air leak. Any air leak that appears at a location adjacent to the secondary reservoir 18 can be determined by the controller 23 accurately, since the secondary pressure in such a case is less than the main pressure at the first stage of operation. measuring the pressure. At the end of the detection of the air leak and the subsequent repairs of the air leak, a series of operations mentioned above is carried out to complete the preparation for starting the weaving operation of the loom weaving machine 1 of the air jet type.
    In the present embodiment, wherein the pressure control via the pneumatic spring type pressure control devices 24 is interrupted by cutting off the power supply of the electropneumatic regulators 9 and 17, so as to prevent the release of the pressure. of compressed air on the basis of pressure control via pneumatic spring type pressure regulating devices 24, which are specific for the electropneumatic regulators 9 and 17, air leakage detection can be carried out precisely. In the embodiment in which the main tank 10 is equipped with the pressure gauge 11 and in which the secondary tank 18 is equipped with Ια pressure gauge 19, respectively, the place corresponding to the air leak, that it is a place disposed adjacent to the main tank 10 or the secondary tank 18, can be determined accurately and therefore the repair of the air leakage can be performed without difficulty.
    In the present embodiment, the air jet type loom 1 having the electropneumatic regulators 9 and 17 can use the same reference value as that used in the case where manual regulators are used to detect an air leak in the pipe system 2, accurately.
    In the present embodiment, a breeze supply is prevented from the main nozzle 13 during the detection of the air leak to thereby detect an air leak in the pipe system 2 accurately.
    The present invention is not limited to the embodiment described above and may be modified within the scope of the invention as exemplified below by way of example. (1) In the embodiment described above, the operational sequence regarding the throttle valve 15, the air supply valve 5 and the start button 43 of the display screen 41 after the at the stop of the loom 1 of the air jet type, can be freely modified. (2) Although, in the embodiment described above, the main tank 10 and the secondary tank 18 are equipped with pressure gauges 11 and 19, the arrangement may be such that the pressure gauge 11 is connected between the ducts 6 and the pressure source 19 are connected between the ducts 16. (3) The air jet type loom in which the method of detecting an air leak is carried out in accordance with the The present invention need not necessarily have a breeze supply element which supplies breeze towards the main nozzle 13. (4) The present invention can be implemented in a polychrome jet-type loom In this case, when several main tanks 10 are provided for the respective main nozzles 13, each main tank 10 is preferably equipped with a pressure gauge 11. (5) In the forge described above, either the pressure gauge 11 of the main reservoir 10 or the pressure gauge 19 of the secondary reservoir 18 may be dispensed with. (6) Although in the embodiment described below, above, the electro-pneumatic controllers 9 and 17 are blocked from power supply, the electromagnetically controlled type valves 27 and 28 can be controlled so as to temporarily make the pressure control temporarily ineffective by the pressure control devices 24 of the The air line 32 may be provided with a valve which is closed when an air leakage is detected.
    权利要求:
    Claims (3)
    [1]
    A method of detecting an air leak in an air jet type loom (1), wherein the air jet type loom (1) has a piping system ( 2) which is connected to an air supply source (3) via an air supply valve (5) and via a line (4); wherein the pipeline system (2) includes a main nozzle (13), a main tank (10), a secondary nozzle (21), a secondary tank (18), two electropneumatic regulators (9, 17) and a dipstick. pressure (8, 11, 19); wherein the electropneumatic controllers (9, 17) have pneumatic spring type pressure regulating devices (24); wherein the main tank (10) is connected to the air supply source (3) via one of the electropneumatic controllers and via the air supply valve (5) to store the compressed air to be fed to the main nozzle (13); wherein the secondary reservoir (18) is connected to the air supply source (3) via the other electropneumatic regulator (9, 17) and via the air supply valve (5) to store the compressed air to be fed to the secondary nozzle (21), the method being characterized by the steps of: shutting off the air jet type loom (1), closing the valve of air supply (5); and stopping the pressure setting via the pneumatic spring type pressure regulating devices (24), the electropneumatic regulators (17), while measuring the pressure in the pipeline system (2) via the pressure gauge (8, 11, 19) for detecting an air leak in the piping system (2).
    [2]
    2. Method according to claim 1, characterized in that the number of pressure gauges (8, 11, 19) is equal to two, one of the pressure gauges (11) being provided in the main reservoir (10) and the another pressure gauge (19) being provided in the secondary reservoir (18).
    [3]
    The method of claim 1 or 2, wherein the piping system (2) includes a breeze supply member which is connected to the main nozzle (13), wherein the breeze supply member has a throttling valve (15), the method being characterized by comprising the step of measuring the pressure in the pipeline system (2) via the pressure gauges (8, 11, 19) after closing the throttle valve (15).
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    JP2015063781A|2015-04-09|
    CN104514072A|2015-04-15|
    JP5842889B2|2016-01-13|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP2013199078A|JP5842889B2|2013-09-26|2013-09-26|Air leak detection method for air jet loom|
    JP2013-199078|2013-09-26|
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