• 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:
    Valve testing machine and associated procedure. The present invention relates to a valve testing machine, namely sealing tests, pressure cycles and resistance to fatigue, as a function of time and mechanical torque applied, to achieve the minimum requirements of suitability for use, in addition to the procedure associated with said machine, where the valve testing machine comprises a system for transmitting the forces of the motor driving the closing and opening of the valve to said valve which ensures a smooth transfer of forces, with the consequent attenuation of a sudden transmission of torque forces to be applied and noise elimination in the interpretation of the measurements to be carried out. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2574493A1
    申请号:ES201431866
    申请日:2014-12-18
    公开日:2016-06-20
    发明作者:José María CHILLÓN MORENO
    申请人:Consejo Superior de Investigaciones Cientificas CSIC；
    IPC主号:
    专利说明:

    Valve test machine and associated procedure
    DESCRIPTION
    5 OBJECT OF THE INVENTION
    The present invention relates to a valve testing machine, in particular tightness tests, pressure cycles and fatigue resistance, as a function of time and mechanical torque applied, to achieve the minimum requirements of suitability 10 for use, in addition to to the procedure associated with said machine.
    The object of the invention is a valve testing machine comprising a system for transmitting the efforts of the motor of closing and opening the valve to said valve, which ensures a smooth transfer of forces 15, with the consequent attenuation of an abrupt transmission of torque forces to be applied and noise elimination in the interpretation of the measurements to be performed.
    BACKGROUND OF THE INVENTION
    20 Sectioning valves are valves used only in fully closed or fully open position, which can interrupt the flow of a system.
    Between the shut-off valves are the gate valves, where the actuation is performed by turning an external actuator that transmits the turning movement 25 to the shaft or spindle that causes the upward or downward movement of a shutter by opening or closing the valve at the passage of the fluid.
    The shaft or spindle is attached to the upper end of the shutter by means of a push collar that transmits the effort associated with the opening and closing of the valve.
    The closure is produced by the contact between the surface of the valve body and the plug. Sealing seals guarantee the tight operation of the valve.
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    Another type of sectioning valves are butterfly valves, where a 90 ° rotation of a disk is carried out for the complete opening or closing of said valve.
    These and other valves, such as integral and continuous flow valves, are tested in valve testing machines to perform on the same tightness tests, pressure cycles and fatigue resistance, depending on the time and mechanical torque applied, for achieve the minimum requirements for suitability for use.
    Among the above is the utility model CN201867308U related to a valve test device, for example butterfly, ball, gate, from the measurement of the pair. It has a torque sensor arranged on the union part of the drive mechanism and the valve. The operation control system is carried out by means of a computer, from the software processing module, a drive control module, a sensor data switching module and a graph data visualization module. The device can continuously test the valve torque during the opening and closing of the processes; and shows graphs of the torque value related to the position of the valve when the valve is opened and closed.
    However, the previous device does not allow smooth transmission of stress from the engine control system to the valve, which translates into noises that affect the interpretation of the measurements to be performed, nor does it test valves of different sizes. and configuration.
    The valve testing machine of the present invention solves all the aforementioned drawbacks.
    DESCRIPTION OF THE INVENTION
    The present invention relates to a valve testing machine comprising a drive motor for closing and opening the valve to be tested and a system for transmitting the forces of the drive motor to said valve, which ensures a smooth stress transfer , with the consequent attenuation of a sudden transmission of torque forces to be applied and the elimination of noise in the
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    interpretation of the measurements to be performed.
    The stress transmission system comprises a coupling device by means of cardan-type markers, which avoids eccentricities in the transmission of the forces to the axis of the valve to be tested.
    Optionally, the valve testing machine comprises a mechanical torque measuring cell arranged in the stress transmission system.
    The valve testing machine also includes a device for fixing the valve axis that allows the stress transmission system to be coupled to the valve to be tested.
    The stress transmission system also includes a height adjustment device to adjust the distance of the fixing device to the valve axis, in accordance with the size of the valve to be tested.
    The valve testing machine also includes an anchoring device for the valve to be tested, which prevents the valve from rotating by applying a torque to its axis.
    The machine also comprises a blind flange on each side of the valve to be tested, which closes both ends of the valve to be tested, where each blind flange in turn comprises a pressure inlet, an air trap, a drain socket of the working fluid of the valve, an outlet of the working fluid in case of failure and optionally an outlet for measuring the pressure.
    Additionally, the valve testing machine comprises a reservoir that houses a working fluid provided with a pump that performs the filling of the valves with the working fluid, as well as a set of electrovalves that control the flow of fluid to perform the cycles. of filling and emptying.
    The valve testing machine also includes a control system that allows the mechanical torque recorded and controlled by the cell and the position of the valve to be tested to be applied and recorded.
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    Preferably, the valve testing machine described above performs tests on gate and butterfly valves from DN 50 to DN 200, although diameter valves up to DN500 could be tested by modifying the anchoring system to the valve to be tested.
    It also allows to perform fatigue resistance tests according to standards UNE-EN 10741 and UNE-EN 1074-2, and because it allows the proper location of the valve to be tested it is also possible to perform most of the tests of said standard, such as the hydraulic pressure resistance of the housing and seat.
    The procedure associated with the valve testing machine described above allows to carry out a fatigue resistance test comprising the following steps:
    - placing the valve in the valve testing machine with the gate-shutter open,
    - closing one end of the valve using the blind flange,
    - closing of the valve-shutter of the valve,
    - application of a driving torque by motor drive,
    - filling of the space between the blind flange and the damper-shutter by means of a working fluid and air extraction,
    - increasing the pressure to a first value of the permissible operating pressure (PFA) and maintaining the pressure at said first value for a first predetermined time interval,
    - opening of the gate-shutter of the valve, and optionally,
    - repetition of the previous stages a certain number of cycles.
    BRIEF DESCRIPTION OF THE DRAWINGS
    Figure 1 shows a perspective view of the valve testing machine of the present invention.
    Figure 2 shows a detail of the area of the valve to be tested of the valve testing machine of the present invention.
    PREFERRED EMBODIMENT OF THE INVENTION
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    According to a detailed description of the invention, the valve testing machine comprises a drive motor (1) of the closing and opening of the valve (2) to be tested and a transmission system of the drive motor forces (1) to the valve (2) to be tested comprising a coupling device (3) by means of cardan-type markers (6), which avoids eccentricities in the transmission of the forces to the axis (19) of the valve (2) to be tested.
    The valve testing machine further comprises a cell (4) for measuring the mechanical torque arranged in the system of transmission of efforts to continuation of the drive motor (1) and before an attenuating element of the torque transmission (18). Next is the coupling device (3) by cardan type (6). This avoids the possible misalignment between the machine and the valve (2) to be tested, which could make it difficult to measure the mechanical torque.
    The valve test machine also includes a fixing device (5) to the axis (19) of the valve (2) that allows the coupling of the force transmission system to the valve (2) to be tested.
    The stress transmission system also includes a height adjustment device (7), preferably telescopic, to adjust the distance of the fixing device (5) to the axis (19) of the valve (2).
    The valve testing machine further comprises an anchoring device for the valve (2) to be tested, comprising a threaded stud (8) with a stop (9) at the end in contact with a blind flange (10) on each side. of the valve to be tested, which closes both ends of the valve (2), where the threaded stud (8) is operable by means of a handwheel (16).
    Each blind flange (10) comprises a pressure inlet (11), an air trap (12), a water drain inlet of the valve (13), a water outlet (14) in case of failure and optionally a socket to measure the pressure (15) by means of a pressure gauge (17).
    Both blind flanges (10) have the same three pressure inlets (11), of
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    water drain from the valve (13), and water outlet (14) in order to be able to perform the test by reversing the direction of the water flow without having to disassemble the valve (2) to be tested from the machine, just inverting the sockets (11, 13, 14) from one (10) to the other flange (10).
    The valve testing machine comprises a water tank (not shown) equipped with a pump that fills the valve with water, as well as a set of solenoid valves (not shown), among which is a purge solenoid valve ( 20), which control the flow of fluid to perform the filling and emptying cycles.
    The valve test machine also includes a control system that allows to apply and record the mechanical torque controlled and consigned by the cell (4) and the position of the valve (2) to be tested, in addition to being able to control the test parameters as the speed, deformation of the damper-shutter, closing torque, opening torque, closing time, filling, purging, pre-pressure, emptying and opening, and being able to check the state in which the test is, the state of the valve (2) and the cycles performed.
    The valve testing machine also includes an emergency stop mushroom (21).
    The procedure associated with the valve testing machine described above allows to carry out a fatigue resistance test comprising the following steps:
    - placing the valve (2) on the valve test machine with the gate-shutter open,
    - closing one end of the valve (2) by means of the blind flange (10),
    - closing the valve shutter gate (2), rotating its axis,
    - application of a driving torque, preferably less than 1.2 times the maximum operating torque, by driving the motor (1),
    - filling the space between the blind flange (10) and the valve shutter-shutter (2) by means of a working fluid, preferably water, and air extraction, connecting the pressure inlet (11) with the pump of the water tank, and producing the extraction of air through the purge outlet (12) connected to the
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    purge solenoid valve (20),
    - increasing the pressure to a first value of the permissible operating pressure (PFA) and maintaining the pressure at said first value for a first predetermined time interval, which is preferably greater than 5 seconds,
    - check the tightness of the valve (2) to verify that no more working fluid passes than is admitted and therefore that there are no leaks,
    - opening the valve shutter gate (2) and draining the water through the water outlet (14) connected to another solenoid valve,
    - repetition of the previous steps for preferably at least 250 cycles, and
    - Verification of the tightness of at least the housing and the valve seat (2), and of all components under pressure.
    This procedure provides a number of advantages not present in a manual drive procedure:
    - Saving in the execution of a repetitive action manually (the number of turns necessary to completely close the gate by means of turns to a crank, which are usually between 30 and 40 turns depending on the size of the valve and many others for its opening for 250 times, one for each complete cycle),
    - possibility of continuous torque measurement in each operation and data record,
    - obtaining the graph of torque and position against time, in real time,
    - possibility to carry out the test continuously up to the number of cycles desired or isolated to a single cycle,
    - possibility of detecting possible internal friction in the valve through the analysis of the force and position curves of the graph,
    - Adaptation of the anchoring system depending on the type of valve to be tested.
    The procedure associated with the valve test machine described above allows the measurement and the graph of the mechanical torque of the valve to be tested to be carried out, by means of the step of applying the driving torque by means of the motor drive (1), so that the valve performs opening-closing cycles.
    For the specific case of a butterfly valve, a first round of the
    gate-shutter clockwise with the valve in the opening position, producing a force peak, then moving to the closing position, where another force peak occurs. Then, at the end of the first round, a rest time of approximately 1 minute begins, in which the elastic seal 5 is recovered to start a second round equal to the first. The results are collected and analyzed by the control system.
    In summary, the valve testing machine of the present invention allows to obtain custom torque / position curves for each valve tested and for each test performed, increasing the versatility thereof.
    权利要求:
    Claims (14)
    [1]
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    1. - Valve test machine comprising a drive motor (1) of the closing and opening of the valve (2) to be tested and a transmission system of the forces of the drive motor (1) to the valve (2) to be tested characterized in that the transmission system of the forces of the drive motor (1) to the valve (2) to be tested comprises a coupling device (3) by means of cardan-type markers (6) to avoid eccentricities in the transmission of the efforts to the axis (19) of the valve (2) to be tested.
    [2]
    2. - Valve test machine according to claim 1 characterized in that it comprises a cell (4) for measuring the mechanical torque arranged in the stress transmission system.
    [3]
    3. - Valve test machine according to claim 2 characterized in that the mechanical torque measuring cell (4) is arranged next to the drive motor (1) and before an attenuating element of the torque transmission (18) .
    [4]
    4. - Valve test machine according to any of the preceding claims characterized in that it comprises a device for fixing (5) to the axis (19) of the valve (2) for coupling the system for transmitting stress to the valve (2) to rehearse
    [5]
    5. - Valve test machine according to any of the preceding claims characterized in that the stress transmission system comprises a height adjustment device (7) to adjust the distance of the fixing device (5) to the axis (19) of the valve (2).
    [6]
    6. - Valve test machine according to claim 5 characterized in that the height adjustment device (7) is telescopic.
    [7]
    7. - Valve test machine according to any one of the preceding claims characterized in that it comprises an anchoring device of the valve (2) to be tested, comprising a threaded stud (8) with a stop (9) at the end in
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    contact with a blind flange (10) on each side of the valve to be tested, which closes both ends of the valve (2), where the threaded stud (8) is operable by means of a handwheel (16).
    [8]
    8. - Valve test machine according to claim 7 characterized in that each blind flange (10) comprises a pressure inlet (11), an air trap (12), a drain outlet of a working fluid of the valve (13), an outlet of the working fluid (14) in case of failure.
    [9]
    9. - Valve test machine according to claim 8 characterized in that it comprises a working fluid reservoir provided with a pump for filling the valve with the working fluid, as well as a set of solenoid valves to control the flow of fluid and perform the filling and emptying cycles.
    [10]
    10. Valve test machine according to any of the preceding claims characterized in that it comprises a control system for applying and registering the mechanical torque consigned and controlled by the cell (4) and the position of the valve (2) to be tested.
    [11]
    11. - Procedure associated with the valve testing machine of claim 10 for carrying out a fatigue resistance test characterized in that it comprises the following steps:
    - placing the valve (2) on the valve test machine with the gate-shutter open,
    - closing one end of the valve (2) by means of the blind flange (10),
    - closing of the valve shutter-shutter (2),
    - application of a driving torque by motor drive
    (one),
    - filling the space between the blind flange (10) and the damper-shutter by means of a working fluid and air extraction,
    - increasing the pressure to a first value of the permissible operating pressure (PFA) and maintaining the pressure at said first value for a first predetermined time interval,
    - opening of the valve-shutter valve (2).
    [12]
    12. Method according to claim 11 characterized in that it comprises the repetition of the stages a certain number of cycles, preferably at least 250 cycles.
    5 13.- Procedure according to claim 12 characterized in that it comprises a
    verification stage of the sealing of at least the housing and the valve seat (2) after the repetition of the stages a certain number of cycles.
    [14]
    14. Method according to any one of claims 11 to 13, characterized in that it comprises a stage for controlling the tightness of the valve (2) after the step of increasing the pressure to a first value of the admissible operating pressure ( PFA) and maintaining the pressure at said first value for a first predetermined time interval.
    15. Method according to any of claims 11 to 14 characterized
    because the applied driving torque is less than 1.2 times the maximum operating torque.
    [16]
    16. Method according to any of claims 11 to 15 characterized in that the first predetermined time interval during which the pressure is maintained at the first allowable operating pressure value is greater than 5 seconds.
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    同族专利:
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    引用文献:
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    EP0082784A1|1981-12-22|1983-06-29|Elf Antargaz|Process and apparatus for the simultaneous automatic control of the tightness and the well functioning of valves for compressed or liquefied gas bottles|
    US6125868A|1998-06-18|2000-10-03|Hydra-Stop, Inc.|Method and apparatus for maintaining valves in a water distribution system|
    CN203463418U|2013-07-23|2014-03-05|山东维科特液压控制技术有限公司|Pilot-operated check valve test bench|
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    CN203616107U|2013-11-27|2014-05-28|苏州锦鹏机电设备制造有限公司|Vertical valve test bench with sliding table|CN106051293A|2016-08-03|2016-10-26|苏州市吴中区胥口广博模具加工厂|Automatic drain valve detecting device|
    CN110319961B|2019-06-27|2021-03-23|保一集团有限公司|Valve torque measuring system|
    法律状态:
    2017-04-11| FG2A| Definitive protection|Ref document number: 2574493 Country of ref document: ES Kind code of ref document: B1 Effective date: 20170411 |
    2017-10-26| FA2A| Application withdrawn|Effective date: 20171020 |
    优先权:
    申请号 | 申请日 | 专利标题
    ES201431866A|ES2574493B1|2014-12-18|2014-12-18|Valve test machine and associated procedure|ES201431866A| ES2574493B1|2014-12-18|2014-12-18|Valve test machine and associated procedure|
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