• 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:
    Device for partial stroke test, locking and automatic stroke adjustment on emergency valve actuators comprising a pneumatic/mechanical module (1), installed and incorporated in the rear body of the actuator (2) to which it is intended, being equipped of a retractable mechanical stop (11) which, depending on whether it is driven or not, emerges towards said actuator (2) and blocks or not the stroke thereof to perform a PST cycle or partial stroke test, and, optionally, a blocking element (3) that, also installed in the actuator (2), is associated with the module (1) so that it blocks the actuator stroke (2) when it is actuated, which has a linear movement as well as a protrusion (31) whose machining combined with the placement of the module (1) allows the actuator (2) to be locked in the necessary degrees for the PST or to regulate the fluid flow. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2724908A1
    申请号:ES201930505
    申请日:2019-06-04
    公开日:2019-09-17
    发明作者:Borrell Jose Sole；Tizon Cristian Barcelo；Cachon Manuel Cuadrado；Miralpeix Jordi Auledas
    申请人:Actreg S A U；
    IPC主号:
    专利说明:

    [0001]
    [0002] DEVICE FOR PARTIAL TEST OF CAREER, LOCK AND
    [0003]
    [0004] OBJECT OF THE INVENTION
    [0005]
    [0006] The invention, as stated in the present specification, refers to a device for partial race test, blocking and automatic adjustment of stroke in emergency valve actuators that provides, to the function to which it is intended, advantages and characteristics, which are described in detail below and that imply an improvement of the current state of the art.
    [0007]
    [0008] The object of the present invention lies in a device whose purpose is to provide an alternative and improved means of mechanical system to perform partial race or PST test cycles in hydraulic or pneumatic linear actuators that actuate emergency valves associated with them in power plants. fluid pipes, thanks to a pneumatic / mechanical module that can be integrated in the actuator itself with a configuration of small size and simplicity of operation, which can be operated manually or remotely, and which also includes a locking element of the actuator that, through said module allows to be able to block it in a certain position, to carry out work, and that also allows the automatic adjustment of the actuator stroke to regulate the flow of the fluid.
    [0009]
    [0010] FIELD OF APPLICATION OF THE INVENTION
    [0011]
    [0012] The scope of the present invention is framed within the industry sector dedicated to the manufacture of control device and safety systems, particularly focusing on the field of safety valve systems for plants or fluid pipe installations.
    [0013]
    [0014] BACKGROUND OF THE INVENTION
    [0015]
    [0016] As is known, in industrial process plants where there are fluid pipes and valves that control their passage through them, emergency shut-off valves (called ESD valves of the English Emergency shot down valves), valves for emptying tanks (Blow are included) down valves) or bypass valves, to protect the integrity of the plant in case of emergency.
    [0017]
    [0018] These emergency valves are normally closed or open and only act in case of emergency to isolate sections of the pipe, empty tanks to divert the fluid or to avoid any other risk in the plant.
    [0019]
    [0020] Emergency valves are commonly automated with single acting hydraulic or pneumatic actuators with spring return to ensure a safe position and keep the position open or closed by means of pressurized air / oil. The valves will close / open automatically by the mechanical action of the springs.
    [0021]
    [0022] It is important that these valves are operative in case of emergency, which entails having to test them periodically to verify their operation. These test cycles can be partial or complete cycles. The complete cycles interrupt the production and the partial cycles do not affect the operability of the process.
    [0023] The partial cycles are carried out by means of a / - 20 ° test (depending on each end user) that do not affect the process or the operation of the factory and are called partial race tests (PST ). According to statistical data, a partial test of the emergency valves avoids possible failures by 80% in case of demand for such emergency valves.
    [0024]
    [0025] For this reason, the PST (Partial stroke test) is a method to guarantee process safety. There are several ways to perform a partial stroke test: with a positioner, pneumatically or mechanically. The present invention relates to a device for performing a PST mechanically.
    [0026]
    [0027] There are several devices on the market capable of performing the PST function:
    [0028]
    [0029] - Positioners, with which the partial closing action is carried out by means of an electro-pneumatic positioner. Being an independent component to the emergency system, the partial test is performed only on the valve and the actuator without checking all the elements to ensure safety closing / opening. The electronic system is unreliable and does not prevent complete closing of the actuator valve. Due to the complex electronic communication of the positioners as well as that most of the emergency valves are mounted in areas of explosive risk, it is an expensive system to install and is an exhaustive maintenance of the system. There is a risk of a total actuator stroke causing production losses as well as false continuous alarms.
    [0030] - Through solenoid valves and sensor systems. This system is primary due to the many components to be installed. It is expensive and It is practically obsolete. By having so many mechanical components, maintenance is expensive and with high failure rates.
    [0031]
    [0032] - Mechanical devices. These systems are made using a mechanical gearbox with difficult automation. The gearbox is placed between the valve and the actuator, which increases the overall dimensions of the final closing element, actuator valve. Most of these devices work manually, which means that there is a possibility of human failure that increases the probability of emergency system failure and, in case of an emergency stop while the device is being operated. device, it could block the valve and the actuator thereby increasing the risk of demand failure. They are expensive devices and they need a personal support to perform the partial race test.
    [0033]
    [0034] On the other hand, in many applications it is necessary that the actuator can be mechanically locked in a desired position, either in the open or closed position of the valve, for example to perform work on the pipe or line where the actuator is placed, blocking mechanically the valve, so it would be desirable to also have a blocking means associated with the PST mechanism.
    [0035]
    [0036] Finally, in various situations, the valve needs to open a few percentage degrees, usually to be able to regulate the flow rate of the fluid that controls the valve. The opening of these grades can be done using pneumatic positioners, but it is very expensive and requires maintenance of the regulatory equipment. It would be desirable, as to be able to mechanically perform said automatic adjustment function of the stroke, without the need to perform it manually or that the actuator is always locked.
    [0037]
    [0038] The PCT / US2016 / 045039 patent is known where a mechanical device for partial race or PST tests is disclosed that blocks the end of the bar that joins the linear actuator with the Scottish yoke coupled to the emergency valve. Although this solution solves the problem of XXX, it only allows blocking the bar when it moves in a specific direction. In other words it does not allow to block the movement of the bar in the two directions. Likewise, this solution does not allow to easily regulate the necessary degrees to perform the partial race test or PST.
    [0039]
    [0040] It would be desirable to have a mechanical device to perform partial race or PST tests that would block the movement of the bar in the two directions as well as allow to easily adjust the degrees of the partial race test or PST.
    [0041]
    [0042] The objective of the present invention is, therefore, to provide a new type of mechanical device for carrying out partial race tests that also acts as a blocking device and as an automatic adjustment device for the actuator stroke, and it should be noted that, although as There are other alternative systems mentioned above, at least on the part of the applicant it is unknown the existence of any that presents technical, structural and constitutive characteristics equal or similar to those presented by the device claimed here.
    [0043]
    [0044] EXPLANATION OF THE INVENTION
    [0045]
    [0046] The device for partial race test, locking and automatic adjustment of stroke in actuators of emergency valves that the invention proposes is configured as the ideal solution to the aforementioned objective that supposes an alternative and improved proposal compared to what is currently known, being the characterizing details that make it possible and distinguish it conveniently collected in the Final claims that accompany the present description.
    [0047]
    [0048] Specifically, the device proposed by the invention comprises a pneumatic / mechanical module that can be operated remotely or manually, depending on the needs.
    [0049]
    [0050] The device of the invention is applied in an emergency valve actuator comprising a hydraulic or pneumatic linear actuator with a bar that drives the axis of an emergency valve through a Scottish yoke, applicable to perform partial race test cycles. or PST in fluid pipe plants.
    [0051]
    [0052] The device of the invention comprises a pneumatic / mechanical module provided with a retractable stop which, depending on whether it is actuated or not, emerges and blocks the part of the Scottish yoke that performs a linear movement the linear movement and consequently blocks the axis of the emergency valve to perform partial race or PST test cycles in fluid pipe plants.
    [0053]
    [0054] This module can be incorporated completely integrated into the pneumatic actuator butt in the same Scottish yoke that joins the pneumatic piston with the axis of the emergency valve by means of at least one rod. With remote drive, it works pneumatically. Giving the pneumatic or electrical signal by means of a 3/2 way solenoid valve, the module activates a mechanical stop which, through a blocking element, causes the single-acting actuator to not close more than the necessary degrees and It is mechanically locked.
    [0055]
    [0056] The mechanical device can also have a mechanical lock that moves the stop back to its original position in case of emergency by means of mechanical springs. The described module can also be operated manually by means of a handle, which preferably has a security key or lock, to prevent unauthorized use of the same, although this possibility is optional.
    [0057]
    [0058] The device module, also preferably but not limited to, incorporates a visual pin to indicate the internal position of the mechanical stop as well as two position sensors to remotely control the device and always know its position.
    [0059]
    [0060] Being integrated into the actuator and being small in size, the overall dimensions of the emergency valve with its actuator do not change substantially from the original sizes of such elements without this device.
    [0061]
    [0062] This device also comprises a locking element that allows a single acting pneumatic actuator to be locked. In many applications, the valve needs to be mechanically locked to certain degrees, either to regulate the flow of the fluid, or to perform maintenance on the control panels of the actuator or the line. With this blocking element that contemplates the device, said locking is achieved mechanically.
    [0063]
    [0064] DESCRIPTION OF THE DRAWINGS
    [0065]
    [0066] To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, accompanies the present descriptive report, as an integral part thereof, a set of drawings in which the following has been represented as an illustrative and non-limiting nature:
    [0067]
    [0068] Figures 1 and 2 show two schematic and sectional views, side and top respectively, of an example of the device object of the invention, represented in position of use once incorporated into the actuator to which it is intended, the main parts being appreciated comprising the mode of assembly thereof in the actuator; Y
    [0069]
    [0070] Figures 3 and 4 show two schematic and sectional views, side and top, respectively, of the pneumatic / mechanical module that constitutes the essential component of the device of the invention for carrying out the PST cycles, the parts and elements thus comprising being appreciated. as the configuration and arrangement thereof, having been represented in Figure 3 with the mechanical stop in the non-blocking position of the actuator and in Figure 4 in the locked position.
    [0071]
    [0072] PREFERRED EMBODIMENT OF THE INVENTION
    [0073]
    [0074] In view of the aforementioned figures, and in accordance with the numbering adopted, an example of non-limiting embodiment of the device for partial stroke test, locking and automatic stroke adjustment in emergency valve actuators of the invention can be observed , which includes what is described in detail below.
    [0075]
    [0076] Thus, as seen in Figures 1 and 2, the device of the invention is applied in an emergency valve actuator comprising a hydraulic or pneumatic linear actuator with a bar (21) that drives the axis (e) of a emergency valve (22) through a Scottish yoke (4), Applicable to perform partial race or PST test cycles in fluid pipe plants.
    [0077]
    [0078] The device of the invention comprises a pneumatic / mechanical module (1) provided with a retractable stop (11) which, depending on whether it is actuated or not, emerges and blocks the part of the Scottish yoke (4) that performs a linear movement of the Linear motion and consequently blocks the axis (e) of the emergency valve (22) to perform partial run or PST test cycles in fluid pipe plants.
    [0079]
    [0080] Preferably, the device comprises, in the part that makes a linear movement of the Scottish yoke (4), a locking element (3) on which the mechanical stop (11) stops.
    [0081]
    [0082] Even more preferably, the blocking element (3) has a projection (31) whose machining combined with the placement of the module (1), allows the actuator (2) to be locked in the necessary degrees to perform the PST or to regulate the flow rate of fluid. In other words, depending on the specific geometry of the blocking element (3), the degrees of movement of the axis (e) can be adjusted, and therefore the dimension of the partial stroke test or PST. For example, the narrower the projection (31) the more the Scottish yoke (4) can advance and the more degrees the emergency valve shaft (3) will rotate. In this sense, the blocking element (3) can be interchangeable according to the needs of the partial race test or PST to be performed.
    [0083]
    [0084] The blocking element (3) may be integral to the Scottish yoke. The blocking element (3) absorbs the axial forces present of the Scottish yoke (4) of the system, for which it is interesting that the blocking element (3) is integral with said Scottish yoke (4), thereby allowing block the actuator stroke (2).
    [0085] On the other hand, according to figures 3 and 4, it can be seen how, in the preferred embodiment, the pneumatic / mechanical module (1) that allows the PST cycle to be carried out, is configured from a body (12) that houses the mentioned mechanical stop (11) that is operated pneumatically, to position it in the locked position (figure 4) by the air inlet (15) provided for that purpose in said body (12) in which the existence of springs is also contemplated (13) which ensure that the module (1) is not pneumatically operated (figure 3) and the mechanical stop (11) is in its original position and does not block the actuator stroke (2).
    [0086]
    [0087] The incorporation of said mechanical springs (13) ensures a safety position that, in the event that the actuator (2) has to make an emergency closing / opening, the locking element (3) does not interfere with the execution of the stroke complete.
    [0088]
    [0089] Preferably, in addition, the module (1) of the device incorporates two sensors (18) proximity detectors to indicate in a remote control room whether the device is activated or not.
    [0090]
    [0091] In addition, the module incorporates, in an external part (14) of the body (12) thereof, a manually operated lever (17) which, linked to the mechanical stop (11) and the springs (13), is intended to block manually and mechanically the actuator stroke (2) and disable said internal springs (13). This block is effective for work on the actuator (2) or on the valve and ensure a fixed and mechanical block of the actuator (2).
    [0092]
    [0093] Figure 3 shows the above lever (17) represented in its two possible positions, one of them by dashed lines.
    [0094] In the preferred embodiment of the invention, said manual lever (17) is installed with a padlock (16) or security key so that it cannot be operated maliciously or by unauthorized personnel.
    [0095]
    [0096] Preferably, the external part (14) of the module body incorporates a visual pin (19) to indicate the internal position of the mechanical stop (11).
    [0097]
    [0098] In addition, to fix the body (12) of the module (1), which is the part that is embedded embedded in the structure of the actuator (2), and the external part (14) thereof, the use of screws (20) is provided. ).
    [0099]
    [0100] Describing sufficiently the nature of the present invention, as well as the way of putting it into practice, it is not considered necessary to make its explanation more extensive so that any person skilled in the art understands its scope and the advantages that derive from it, stating that, within its essentiality, it may be carried out in other embodiments that differ in detail from that indicated by way of example, and to which it will also achieve the protection that is sought provided that it does not alter, change or modify its fundamental principle .
    权利要求:
    Claims (9)
    [1]
    1. - Device for partial stroke test, automatic locking and adjustment of stroke in emergency valve actuators comprising a hydraulic or pneumatic linear actuator with a bar (21) that drives the axis (e) of an emergency valve (22 ) through a Scottish yoke (4), applicable to carry out partial race test cycles or in fluid pipe plants, it is characterized by comprising a pneumatic / mechanical module (1) provided with a retractable stop (11) which, Depending on whether it is actuated or not, the part of the Scottish yoke (4) that makes a linear movement emerges and blocks the linear movement and consequently blocks the axis (e) of the emergency valve (22).
    [2]
    2. - Device for partial race test, locking and automatic stroke adjustment in emergency valve actuators, according to claim 1, characterized in that the part of the Scottish yoke (4) that carries out a linear movement comprises a blocking element (3 ) on which the mechanical stop stops (11).
    [3]
    3. - Device for partial test of stroke, blocking and automatic adjustment of stroke in actuators of emergency valves, according to claim 2, characterized in that the blocking element (3) has a projection (31) whose machining combined with the placement of the module (1), allows to block the actuator (2) in the necessary degrees to perform the PST or to regulate the fluid flow.
    [4]
    4. - Device for partial race test, locking and automatic stroke adjustment in emergency valve actuators, according to claims 2 and 3, characterized in that the blocking element (3) is integral with the Scottish yoke (4) it has the actuator (2).
    [5]
    5. - Device for partial stroke test, locking and automatic stroke adjustment in emergency valve actuators, according to any of claims 1 to 4, characterized in that the mechanical stop (11) of the module (1) is pneumatically actuated, for position it in the locked position, by means of an air inlet (15) provided for that purpose in the body (12) thereof.
    [6]
    6. - Device for partial race test, locking and automatic stroke adjustment in emergency valve actuators, according to any of claims 1 to 3 and 5, characterized in that the module (1) comprises springs (13) that ensure that It is not pneumatically operated and the mechanical stop (11) is in its original position and does not block the actuator stroke (2).
    [7]
    7. - Device for partial stroke test, automatic locking and adjustment of stroke in emergency valve actuators, according to any of claims 1 to 3 and 5 or 6, characterized in that the module (1) incorporates two sensors (18) detectors proximity to indicate in a remote control room if the device is powered or not.
    [8]
    8. - Device for partial race test, locking and automatic stroke adjustment in emergency valve actuators, according to any of claims 1 to 3 and 5 to 7, characterized in that the module (1) incorporates a lever (17) of manual actuation which, linked to the mechanical stop (11) manually and mechanically blocks the actuator stroke (2) and renders, if necessary, internal springs (13) that ensure that it is not pneumatically operated and such a mechanical stop (11) is in its original position and does not block the actuator stroke (2).
    [9]
    9. - Device for partial stroke test, automatic locking and adjustment of stroke in emergency valve actuators, according to the claim 8, characterized in that the manual lever (17) has a padlock (16) or safety key installed.
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    同族专利:
    公开号 | 公开日
    ES2724908B2|2020-06-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US6640688B1|2000-08-25|2003-11-04|Tyco Flow Control, Inc.|Actuator assembly|
    US6935610B1|2003-01-17|2005-08-30|Dynatorque, Inc.|Partial stroke valve test apparatus|
    US20060005696A1|2004-07-05|2006-01-12|Massimo Glisenti|Actuator with a variable run|
    US20060185418A1|2005-01-31|2006-08-24|Samson Ag|Method for testing the functionality of an actuator, especially of an actuator of a safety valve|
    WO2017020044A1|2015-07-30|2017-02-02|Bray International, Inc.|Combination device for lockout and partial stroke test of valve actuators|
    法律状态:
    2019-09-17| BA2A| Patent application published|Ref document number: 2724908 Country of ref document: ES Kind code of ref document: A1 Effective date: 20190917 |
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201930505A|ES2724908B2|2019-06-04|2019-06-04|DEVICE FOR PARTIAL RACE TEST, LOCKING AND AUTOMATIC RUN ADJUSTMENT IN EMERGENCY VALVE ACTUATORS|ES201930505A| ES2724908B2|2019-06-04|2019-06-04|DEVICE FOR PARTIAL RACE TEST, LOCKING AND AUTOMATIC RUN ADJUSTMENT IN EMERGENCY VALVE ACTUATORS|
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