High-pressure butterfly valve test bed and high-pressure butterfly valve test method

Abstract

The invention provides a high-pressure butterfly valve test bed and a high-pressure butterfly valve test method, and particularly relates to the technical field of test devices.The high-pressure butterfly valve test bed comprises a supporting frame, a base, a workbench, a pressurizing oil cylinder and a pressure-bearing chassis; the base and the working table are both arranged on the supporting frame, the working table is located over the base, the pressurizing oil cylinder is embedded in the working table, and the pressure-bearing chassis is connected to the base; wherein a piston rod of the pressurizing oil cylinder faces the part, extending out of the cylinder body of the pressurizing oil cylinder, of the base, the extending end of the piston rod of the pressurizing oil cylinder is connected with a pressurizing disc, and the pressurizing disc is located over the base. A rodless cavity of the pressurizing oil cylinder is arranged as an output cavity, the pressurizing oil cylinder is further arranged right above the base, and a piston rod of the pressurizing oil cylinder extends out from top to bottom, so that the problem of non-uniform output force of multiple oil cylinders can be avoided, and a more accurate and reliable detection result can be obtained.

Description

Technical Field

[0001] The present application relates to the technical field of test devices, and in particular to a high-pressure butterfly valve test bench and a high-pressure butterfly valve test method. Background Art

[0002] A butterfly valve is a regulating valve whose closing part (such as a valve disc or butterfly plate) is a disc that rotates around the valve axis to achieve opening and closing. It can be used for on-off control of pipeline media.

[0003] In order to detect the sealing performance of the butterfly valve under high-pressure environment, the relevant technology will use a claw press to test the butterfly valve. The specific test process is: close the valve port at one end of the butterfly valve, and fill the butterfly valve with test medium (such as water, oil, etc.), then use a claw press to close the valve port at the other end of the butterfly valve, and then use the vertical top pressure structure to pressurize the butterfly valve to the set pressure and maintain the pressure for a period of time. The sealing performance of the butterfly valve is determined by detecting whether the pressure of the test medium in the butterfly valve is reduced.

[0004] It was found in the application that the output force of the pressurizing cylinder of the claw press is limited, so it is necessary to set up multiple pressurizing cylinders around the butterfly valve to jointly close the valve port at the other end of the butterfly valve. However, as the number of pressurizing cylinders increases, not only will the failure rate of the pressurizing cylinders increase, but there is also a risk of unreliable test results due to uneven output of multiple pressurizing cylinders.

[0005] That is to say, the reliability of the test results of the butterfly valve sealing performance based on the relevant technology is poor. Summary of the invention

[0006] The purpose of the present application is to provide a high-pressure butterfly valve test bench and a high-pressure butterfly valve test method, which are used to solve the technical problem of poor reliability of the output test results when the related technology detects the sealing performance of the butterfly valve.

[0007] In a first aspect, an embodiment of the present application provides a high-pressure butterfly valve test bench, the high-pressure butterfly valve test bench comprising: Support frame, base, workbench, pressurized cylinder, pressure chassis; The base and the workbench are both arranged on the support frame, and the workbench is located directly above the base, the pressurized oil cylinder is embedded in the workbench, and the pressure-bearing chassis is connected to the base; Wherein, the piston rod of the pressurizing oil cylinder extends out of the cylinder body of the pressurizing oil cylinder toward the base, and the extended end of the piston rod of the pressurizing oil cylinder is connected to a pressurizing plate, and the pressurizing plate is located directly above the base; When oil flows into the rodless chamber of the pressurizing oil cylinder and oil flows out of the rod chamber, the pressurizing oil cylinder is in a pressurized state, and the piston rod of the pressurizing oil cylinder extends; When oil enters the rod chamber of the pressurizing oil cylinder and oil exits the rodless chamber, the pressurizing oil cylinder is in a pressure-releasing state, and the piston rod of the pressurizing oil cylinder retracts.

[0008] In one embodiment, the high-pressure butterfly valve test bench further comprises: a central oil cylinder; The central oil cylinders are all arranged on the target side wall of the base, and the target side wall is any side wall of the base; The piston rod of the central oil cylinder extends away from the target side wall in a direction perpendicular to the target side wall, and the extended end is connected to the pressure chassis through a transfer assembly; When the piston rod of the central oil cylinder drives the pressure chassis to move to the first position, the projection of the pressure chassis in the reference plane and the projection of the pressure plate in the reference plane are independent of each other, wherein the reference plane is the plane where the end surface of the base facing away from the workbench is located; When the piston rod of the central oil cylinder drives the pressure chassis to move to the second position, the pressure chassis is located directly below the pressure plate.

[0009] In one embodiment, the high-pressure butterfly valve test bench further comprises: two movable guide rails; The two movable guide rails are both arranged on the target side wall, the two movable guide rails are parallel to each other, and extend outward away from the target side wall in a direction perpendicular to the target side wall, and the central oil cylinder is located between the two movable guide rails; Two sliders are arranged on the end surface of the pressure-bearing chassis facing the base, wherein one of the sliders is slidably connected in one of the movable guide rails, and the other slider is slidably connected in the other of the movable guide rails.

[0010] In one embodiment, a plurality of circular grooves are formed on the end surface of the pressure-bearing chassis facing away from the base, and the plurality of circular grooves are coaxial and have different radii.

[0011] In one embodiment, the support frame includes N support columns, and the N support column arrays are arranged on opposite sides of the base, and N is an integer greater than or equal to 4.

[0012] In one embodiment, the workbench is located between the N support columns; A plurality of storage grooves are provided on the side wall of the workbench, and a plurality of protrusions are provided on the side wall of each support column facing the workbench, and the plurality of protrusions are respectively embedded in the plurality of storage grooves.

[0013] In one embodiment, the high-pressure butterfly valve test bench further includes: a protective enclosure arranged around the support frame, the protective enclosure including a transparent viewing mirror, and the viewing mirror is arranged toward the pressure chassis.

[0014] In one embodiment, an elastic rubber pad is provided on the end surface of the pressure plate facing the base.

[0015] In a second aspect, the present application also provides a high-pressure butterfly valve test method, characterized in that the method comprises: Placing the butterfly valve to be tested on the high-pressure butterfly valve test bench described in the first aspect, and sealing one end of the butterfly valve to be tested based on the pressure-bearing chassis; Filling the butterfly valve to be tested with a test medium; Start the pressurizing oil cylinder so that the piston rod of the pressurizing oil cylinder extends toward the butterfly valve to be tested until the pressurizing plate and the other end valve port of the butterfly valve to be tested are tightly abutted; During the set pressure holding time, the pressure in the butterfly valve to be tested is continuously detected, and a test result is formed based on the pressure detection result, and the test result is used to indicate whether the sealing performance of the butterfly valve to be tested is qualified.

[0016] In one embodiment, the step of closing a valve port at one end of the butterfly valve to be tested based on the pressure-bearing chassis includes: The central oil cylinder is controlled to drive the pressure-bearing chassis to move to the first position along the movable guide rail. Placing the butterfly valve to be tested on the pressure-bearing chassis so that a valve port at one end of the butterfly valve to be tested is engaged with a circular groove on the pressure-bearing chassis; Controlling the central oil cylinder to drive the pressure-bearing chassis to move to the second position along the movable guide rail; Wherein, when the pressure-bearing chassis is in the first position, the projection of the pressure-bearing chassis in the reference plane and the projection of the pressure plate in the reference plane are independent of each other, wherein the reference plane is the plane where the end surface of the base facing away from the workbench is located; When the pressure-bearing chassis is in the second position, the pressure-bearing chassis is located directly below the pressure plate.

[0017] In the present application, a rodless chamber of the pressurizing cylinder is set as an output chamber when the pressurizing cylinder applies pressure to obtain a larger effective output space, and the pressurizing cylinder is further arranged to be located directly above the base for placing the butterfly valve, and the piston rod of the pressurizing cylinder is arranged to extend from top to bottom. Through the above-mentioned top pressure design, one pressurizing cylinder can provide sufficient output force. The design of this single pressurizing cylinder can avoid the problem of uneven output force of multiple cylinders. Based on this, butterfly valve sealing detection can obtain more accurate and reliable detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is one of the structural schematic diagrams of a high-pressure butterfly valve test bench provided in an embodiment of the present application; Figure 2 This is the second structural schematic diagram of a high-pressure butterfly valve test bench provided in an embodiment of the present application; Figure 3 It is a structural schematic diagram of a pressurized oil cylinder provided in an embodiment of the present application;

[0019] Figure 4 It is a flow chart of a high-pressure butterfly valve testing method provided in an embodiment of the present application.

[0020] Description of the drawings: 101, support frame; 102, base; 103, workbench; 104, pressure cylinder; 1041, pressure plate; 105, pressure chassis; 106, center cylinder; 107, moving guide rail; 108, storage box; 109, control console. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0022] In the related technology, a claw press is usually used to carry out a butterfly valve sealing test. The test bench corresponding to the claw press is provided with a plurality of claw cylinders, which are distributed around the butterfly valve array. The piston rod of each claw cylinder extends vertically upward and is fixedly connected with a claw. During the test, one end of the butterfly valve is closed by a related seal on the test bench corresponding to the claw press, and the other end of the butterfly valve is covered with a sealing plate. The plurality of claw cylinders are started simultaneously, and the claw corresponding to each claw cylinder applies pressure vertically downward to the sealing plate to apply a set pressure to the butterfly valve through the sealing plate.

[0023] When the above test process is carried out based on the claw press, it is difficult to synchronously control multiple claw cylinders, and the risk of uneven output force of multiple claw cylinders is high. The uneven output force of multiple claw cylinders will cause weak areas in the sealing plate. Not only is it easy for medium leakage to occur through the weak area, which will lead to inaccurate butterfly valve sealing test results; there is also a safety hazard of medium spraying out and injuring people.

[0024] The presence of multiple claw press cylinders also poses a great challenge to the maintenance of the claw press. For maintenance personnel, first of all, as the number of claw press cylinders increases, the risk of claw press cylinder failure also increases accordingly. Therefore, maintenance personnel will maintain the claw press more frequently, which will increase maintenance costs.

[0025] Secondly, during the maintenance process, in addition to detecting and maintaining the function of a single claw pressing cylinder, maintenance personnel must also detect and confirm whether the output force of multiple claw pressing cylinders is consistent (to avoid uneven output force of multiple claw pressing cylinders), which also increases the maintenance difficulty and time consumption of the claw pressing machine to a certain extent.

[0026] In view of the above problems, the present application provides a high pressure butterfly valve test bench, such as Figure 1 and Figure 2 As shown, the high pressure butterfly valve test bench comprises: Support frame 101, base 102, workbench 103, pressurized oil cylinder 104, pressure-bearing chassis 105; The base 102 and the workbench 103 are both arranged on the support frame 101, and the workbench 103 is located directly above the base 102, the pressurizing cylinder 104 is embedded in the workbench 103, and the pressure-bearing chassis 105 is connected to the base 102; The piston rod of the pressurizing cylinder 104 extends out of the cylinder body of the pressurizing cylinder 104 toward the base 102 , and the extended end of the piston rod of the pressurizing cylinder 104 is connected to a pressurizing plate 1041 , which is located directly above the base 102 .

[0027] Specifically, Figure 3 As shown, when oil enters the rodless chamber of the pressurizing oil cylinder 104 and oil exits the rod chamber, the pressurizing oil cylinder 104 is in a pressurized state, and the piston rod of the pressurizing oil cylinder 104 extends; When oil enters the rod chamber of the pressurizing oil cylinder 104 and oil exits the rod chamber, the pressurizing oil cylinder 104 is in a pressure-releasing state, and the piston rod of the pressurizing oil cylinder 104 retracts.

[0028] Here, the axis of the piston rod of the pressurizing cylinder 104 passes through the center of the pressurizing plate 1041 .

[0029] In the present application, a rodless chamber of the pressurizing cylinder 104 is set as an output chamber when the pressurizing cylinder 104 applies pressure, so as to obtain a larger effective output space (compared with a rod chamber, since the space occupied by the piston rod is omitted, the oil filling space is larger, so that the downward pressure that can be output per unit height is larger), and the pressurizing cylinder 104 is further arranged to be located directly above the base 102 for placing the butterfly valve, and the piston rod of the pressurizing cylinder 104 is arranged to extend from top to bottom. Through the above-mentioned top pressure design, one pressurizing cylinder 104 can provide sufficient output force. The design of this single pressurizing cylinder 104 can avoid the problem of uneven output force of multiple cylinders, and butterfly valve sealing detection can be performed based on this, which can obtain more accurate and reliable detection results.

[0030] It should be noted that the design of the single pressurizing cylinder 104 referred to in the present application omits the design of multiple claw press cylinders provided by the related technology, thereby avoiding the problem of medium leakage caused by uneven output force of multiple claw press cylinders, and can reduce the repair frequency, difficulty and time of maintenance personnel.

[0031] Specifically, the support frame 101 is used to cooperate with the base 102 to support the workbench 103, the base 102 is used to place the pressure chassis 105 and bear the downward pressure applied by the pressurized oil cylinder 104, the pressure chassis 105 is used to place the butterfly valve and close the valve port at one end of the butterfly valve, and the workbench 103 is used to support the pressurized oil cylinder 104, so that the pressurized oil cylinder 104 can be set directly above the base 102, and the pressurized oil cylinder 104 is used to cooperate with the pressurized plate 1041 connected to the extended end of its piston rod to apply pressure to the butterfly valve.

[0032] In application, in order to facilitate the use of the high-pressure butterfly valve test bench described in this application, a storage tank 108 can be set on one side of the high-pressure butterfly valve test bench to store the test medium used to test the butterfly valve, so as to facilitate the test personnel to take the test medium.

[0033] Exemplarily, the test medium may be liquids such as water and oil that are harmless to the human body.

[0034] Compared with the diameter of the claw cylinder of the claw press, the diameter of the pressurizing cylinder 104 of the high-pressure butterfly valve test bench described in the present application is larger to obtain a larger effective output space. For example, the diameter of the pressurizing cylinder 104 can be twice or even larger than the diameter of the claw cylinder of the claw press.

[0035] It should be understood that in actual use, a control console 109 will be provided on one side of the high-pressure butterfly valve test bench for the user to control the pressurized cylinder 104 and the circuit control and oil circuit control of the relevant components in the high-pressure butterfly valve test bench.

[0036] In one embodiment, the high-pressure butterfly valve test bench further includes: a central oil cylinder 106; The central oil cylinders 106 are all disposed on a target side wall of the base 102 , and the target side wall is any side wall of the base 102 ; The piston rod of the central oil cylinder 106 extends away from the target side wall in a direction perpendicular to the target side wall, and the extended end is connected to the pressure chassis 105 through a transfer assembly; When the piston rod of the central oil cylinder 106 drives the pressure chassis 105 to move to the first position, the projection of the pressure chassis 105 in the reference plane and the projection of the pressure plate 1041 in the reference plane are independent of each other, wherein the reference plane is the plane where the end surface of the base 102 facing away from the workbench 103 is located; When the piston rod of the central oil cylinder 106 drives the pressure chassis 105 to move to the second position, the pressure chassis 105 is located directly below the pressure plate 1041 .

[0037] Herein, the pressure chassis 105 is located directly below the pressure plate 1041, which should be understood as: the straight line connecting the center of the pressure chassis 105 and the center of the pressure plate 1041 is perpendicular to the horizontal plane (that is, the straight line in the direction of gravity).

[0038] In this embodiment, based on the setting of the central cylinder 106, the position movement of the pressure chassis 105 is achieved in an automated manner to replace the manual operation, thereby avoiding the pressure chassis 105 deviating from the bottom of the pressurizing cylinder 104 due to human factors, ensuring that the pressurized plate 1041 connected to the pressurized cylinder 104 can be aligned with the center position of the pressure chassis 105, thereby ensuring that the center position of the pressurized plate 1041 and the center position of the butterfly valve are aligned, so that each position of the butterfly valve contacting the pressurized plate 1041 can be evenly stressed, avoiding the problem of medium leakage due to uneven force, and ensuring the accuracy of the test results.

[0039] The above-mentioned first position and second position can be understood as the two extreme positions of the moving trajectory of the pressure chassis 105. Specifically, the piston rod of the central oil cylinder 106 continues to extend in the direction away from the base 102 to drive the pressure chassis 105 to move out of the base 102 until it moves to the first position. At this time, the user can complete the placement of the butterfly valve on the pressure chassis 105. The projection of the pressure chassis 105 in the reference plane when it is in the first position and the projection of the pressure plate 1041 in the reference plane are set to be independent of each other. This is to avoid the user's butterfly valve placement operation being interfered with by the pressure plate 1041; when the user completes the placement of the butterfly valve, the piston rod of the central oil cylinder 106 continues to retract in the direction of the base 102 to drive the pressure chassis 105 back to the base 102 until it moves to the second position.

[0040] In one embodiment, the high pressure butterfly valve test bench further comprises: two movable guide rails 107; The two movable guide rails 107 are both arranged on the target side wall, the two movable guide rails 107 are parallel to each other, and extend outward away from the target side wall in a direction perpendicular to the target side wall, and the central oil cylinder 106 is located between the two movable guide rails 107; Two sliders are provided on the end surface of the pressure chassis 105 facing the base 102 , wherein one of the sliders is slidably connected to one of the movable guide rails 107 , and the other slider is slidably connected to the other movable guide rail 107 .

[0041] In this embodiment, based on the setting of two movable guide rails 107, while facilitating the pressure chassis 105 to move into or out of the base 102, support is provided for the pressure chassis 105 when it moves out of the base 102, ensuring the stable placement of the butterfly valve on the pressure chassis 105, and at the same time, limiting the movement trajectory of the pressure chassis 105 between the first position and the second position, ensuring that the pressure chassis 105 can correctly move to the first position and / or the second position.

[0042] In one embodiment, a plurality of circular grooves are formed on the end surface of the pressure bottom plate 105 facing away from the base 102 , and the plurality of circular grooves are coaxial and have different radii.

[0043] Furthermore, the axis of the pressurizing cylinder 104 passes through the center of the circular groove.

[0044] In this embodiment, based on the arrangement of multiple circular grooves, the testing of butterfly valves of various calibers is supported, which can make the application of the high-pressure butterfly valve test bench described in the present application more flexible.

[0045] In one embodiment, the support frame 101 includes N support columns, and the N support column arrays are arranged on two opposite sides of the base 102, where N is an integer greater than or equal to 4.

[0046] In this embodiment, based on N support columns arranged on opposite sides of the base 102, under the premise of ensuring the structural stability of the high-pressure butterfly valve test bench, the opposite sides of the base 102 where no support columns are set are completely left empty, leaving enough space for the user to place the butterfly valve, supporting the user to install a larger medium pipe port with a larger inlet / outlet pressure diameter, with a large medium flow rate and a faster detection speed, while saving manpower, improving the efficiency of sealing testing, and facilitating user use.

[0047] Specifically, when N is 4, the array of N support columns arranged on opposite sides of the base 102 can be understood as follows: all four support columns are set on the ground, and two of the support columns are against one of the side walls on opposite sides of the base 102, while the other two support columns are against the other side wall on opposite sides of the base 102.

[0048] It should be understood that the aforementioned target side wall is specifically one of the two opposite side walls of the base 102 where no support columns are provided.

[0049] In one embodiment, the workbench 103 is located between the N support columns; A plurality of receiving grooves are formed on the side wall of the workbench 103 , and a plurality of protrusions are formed on the side wall of each support column facing the workbench 103 , and the plurality of protrusions are respectively embedded in the plurality of receiving grooves.

[0050] In this embodiment, the workbench 103 is supported by N support columns, and the contact area between the workbench 103 and the support columns is increased by utilizing the cooperation between the protrusions and the storage grooves, and it is ensured that the workbench 103 can obtain sufficient bearing capacity in the direction of gravity, thereby ensuring that the pressure-bearing capacity of the workbench 103 is sufficient to bear the setting and operation of the pressurized cylinder 104.

[0051] In one embodiment, the high-pressure butterfly valve test bench further includes: a protective enclosure arranged around the support frame 101 , the protective enclosure including a transparent viewing mirror, and the viewing mirror is arranged toward the pressure chassis 105 .

[0052] In this embodiment, by setting up a protective enclosure, protection can be provided for the test personnel during the process of the pressurized cylinder 104 applying pressure to the butterfly valve to be tested, thereby preventing the test medium in the butterfly valve from leaking and spraying out and injuring the test personnel, thereby improving the safety of the high-pressure butterfly valve test bench during use.

[0053] Among them, a transparent sight glass is set towards the pressure chassis 105. On the basis of ensuring the personal safety of the test personnel, the test personnel can visually observe the appearance of the butterfly valve, so that the test personnel can terminate the test in time when the medium leaks based on the appearance of the butterfly valve, thereby further improving the safety of the butterfly valve sealing test.

[0054] Exemplarily, the mirror can be made of any transparent material with sufficient impact resistance, such as fiberglass.

[0055] In some embodiments, in order to ensure the safety of the high-pressure butterfly valve test bench, an automatic unloading logic can also be configured, that is, when the pressurizing oil cylinder 104 is on standby (no control command input by the user is received within the set time), if it is detected that the piston rod of the pressurizing oil cylinder 104 is still in the extended state, the pressurizing oil cylinder 104 is locked (to prevent accidents caused by accidental touch) and automatically unloaded, so as to restore the piston rod of the pressurizing oil cylinder 104 to the retracted state, so as to unload the load pressure of the rodless chamber of the pressurizing oil cylinder 104, so that the driving oil of the rodless chamber of the pressurizing oil cylinder 104 can be cooled and cooled, so as to save unnecessary energy consumption of the pressurizing oil cylinder 104 and extend the service life of the pressurizing oil cylinder 104; When receiving the unlocking command from the user, the lock of the pressurized oil cylinder 104 is released, and the control command input by the user is waited for a set time.

[0056] Furthermore, corresponding automatic unloading settings can be made for the storage tank 108, and the locking logic of the pressurizing cylinder 104 and the locking logic of the storage tank 108 can be associated, that is, the storage tank 108 is locked when the pressurizing cylinder 104 is locked, and the storage tank 108 is unlocked when the pressurizing cylinder 104 is unlocked.

[0057] The present application also provides a high pressure butterfly valve test method. Figure 4 As shown, the high pressure butterfly valve test method includes: Step 401: placing the butterfly valve to be tested on a high-pressure butterfly valve test bench, and closing a valve port at one end of the butterfly valve to be tested based on the pressure-bearing chassis.

[0058] Step 402: Fill the butterfly valve to be tested with a test medium.

[0059] Step 403: Start the pressurizing oil cylinder so that the piston rod of the pressurizing oil cylinder extends toward the butterfly valve to be tested until the pressurizing plate and the other end valve port of the butterfly valve to be tested are tightly abutted.

[0060] Step 404: within the set pressure holding time, continuously detect the pressure in the butterfly valve to be tested, and form a test result based on the pressure detection result, wherein the test result is used to indicate whether the sealing performance of the butterfly valve to be tested is qualified.

[0061] Among them, the relevant structural composition and functions of the high-pressure butterfly valve test bench described in this method can be found in the description of the aforementioned embodiment, and will not be described again to avoid repetition.

[0062] Specifically, the process of continuously detecting the pressure in the butterfly valve to be tested and forming a test result based on the pressure detection result, wherein the test result is used to indicate whether the sealing performance of the butterfly valve to be tested is qualified may be: Continuously detect the pressure of the test medium in the butterfly valve to be tested (such as water pressure, oil pressure, etc.); If the pressure decreases within the set pressure holding time and the decrease is greater than or equal to the set threshold, a pressure test result indicating that the pressure test is unqualified is output, and a test result indicating that the sealing of the butterfly valve to be tested is unqualified is formed accordingly; If the pressure does not decrease within the set pressure holding time, or the pressure decreases but the decrease is less than the aforementioned set threshold, a pressure test result indicating that the pressure test is qualified is output, and a test result indicating that the sealing of the butterfly valve to be tested is qualified is formed accordingly.

[0063] Furthermore, the method of closing a valve port at one end of the butterfly valve to be tested based on the pressure-bearing chassis includes: The central oil cylinder is controlled to drive the pressure-bearing chassis to move to the first position along the movable guide rail. Placing the butterfly valve to be tested on the pressure-bearing chassis so that a valve port at one end of the butterfly valve to be tested is engaged with a circular groove on the pressure-bearing chassis; Controlling the central oil cylinder to drive the pressure-bearing chassis to move to the second position along the movable guide rail; Wherein, when the pressure-bearing chassis is in the first position, the projection of the pressure-bearing chassis in the reference plane and the projection of the pressure plate in the reference plane are independent of each other, wherein the reference plane is the plane where the end surface of the base facing away from the workbench is located; When the pressure-bearing chassis is in the second position, the pressure-bearing chassis is located directly below the pressure plate.

[0064] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A high pressure butterfly valve test bench, characterized in that: The high pressure butterfly valve test bench comprises: Support frame, base, workbench, pressurized cylinder, pressure chassis; The base and the workbench are both arranged on the support frame, and the workbench is located directly above the base, the pressurized oil cylinder is embedded in the workbench, and the pressure-bearing chassis is connected to the base; Wherein, the piston rod of the pressurizing oil cylinder extends out of the cylinder body of the pressurizing oil cylinder toward the base, and the extended end of the piston rod of the pressurizing oil cylinder is connected to a pressurizing plate, and the pressurizing plate is located directly above the base; When oil flows into the rodless chamber of the pressurizing oil cylinder and oil flows out of the rod chamber, the pressurizing oil cylinder is in a pressurized state, and the piston rod of the pressurizing oil cylinder extends; When oil enters the rod chamber of the pressurizing oil cylinder and oil exits the rodless chamber, the pressurizing oil cylinder is in a pressure-releasing state, and the piston rod of the pressurizing oil cylinder retracts.

2. The high pressure butterfly valve test bench according to claim 1 is characterized in that: The high-pressure butterfly valve test bench also includes: a central oil cylinder; The central oil cylinders are all arranged on the target side wall of the base, and the target side wall is any side wall of the base; The piston rod of the central oil cylinder extends away from the target side wall in a direction perpendicular to the target side wall, and the extended end is connected to the pressure chassis through a transfer assembly; When the piston rod of the central oil cylinder drives the pressure chassis to move to the first position, the projection of the pressure chassis in the reference plane and the projection of the pressure plate in the reference plane are independent of each other, wherein the reference plane is the plane where the end surface of the base facing away from the workbench is located; When the piston rod of the central oil cylinder drives the pressure chassis to move to the second position, the pressure chassis is located directly below the pressure plate.

3. The high pressure butterfly valve test bench according to claim 2 is characterized in that: The high-pressure butterfly valve test bench also includes: two movable guide rails; The two movable guide rails are both arranged on the target side wall, the two movable guide rails are parallel to each other, and extend outward away from the target side wall in a direction perpendicular to the target side wall, and the central oil cylinder is located between the two movable guide rails; Two sliding blocks are arranged on the end surface of the pressure-bearing chassis facing the base, wherein one of the sliding blocks is slidably connected in one of the movable guide rails, and the other sliding block is slidably connected in the other of the movable guide rails.

4. The high pressure butterfly valve test bench according to claim 1 is characterized in that: A plurality of circular grooves are formed on the end surface of the pressure-bearing chassis facing away from the base. The plurality of circular grooves are coaxial and have different radii.

5. The high pressure butterfly valve test bench according to claim 1, characterized in that: The support frame includes N support columns, and the N support column arrays are arranged on opposite sides of the base, and N is an integer greater than or equal to 4.

6. The high pressure butterfly valve test bench according to claim 5, characterized in that: The workbench is located between the N support columns; A plurality of storage grooves are provided on the side wall of the workbench, and a plurality of protrusions are provided on the side wall of each support column facing the workbench, and the plurality of protrusions are respectively embedded in the plurality of storage grooves.

7. The high pressure butterfly valve test bench according to claim 1, characterized in that: The high-pressure butterfly valve test bench also includes: a protective enclosure arranged around the support frame, the protective enclosure includes a transparent sight glass, and the sight glass is arranged toward the pressure-bearing chassis.

8. The high pressure butterfly valve test bench according to claim 1, characterized in that: An elastic rubber pad is arranged on the end surface of the pressure plate facing the base.

9. A high pressure butterfly valve test method, characterized in that: The method comprises: Placing the butterfly valve to be tested on the high-pressure butterfly valve test bench according to any one of claims 1 to 8, and sealing one end of the valve port of the butterfly valve to be tested based on the pressure-bearing chassis; Filling the butterfly valve to be tested with a test medium; Start the pressurizing oil cylinder so that the piston rod of the pressurizing oil cylinder extends toward the butterfly valve to be tested until the pressurizing plate and the other end valve port of the butterfly valve to be tested are tightly abutted; During the set pressure holding time, the pressure in the butterfly valve to be tested is continuously detected, and a test result is formed based on the pressure detection result, and the test result is used to indicate whether the sealing performance of the butterfly valve to be tested is qualified.

10. The high pressure butterfly valve testing method according to claim 9, characterized in that: The method of closing a valve port at one end of the butterfly valve to be tested based on the pressure-bearing chassis includes: The central oil cylinder is controlled to drive the pressure-bearing chassis to move to the first position along the movable guide rail. Placing the butterfly valve to be tested on the pressure-bearing chassis so that a valve port at one end of the butterfly valve to be tested is engaged with a circular groove on the pressure-bearing chassis; Controlling the central oil cylinder to drive the pressure-bearing chassis to move to the second position along the movable guide rail; Wherein, when the pressure-bearing chassis is in the first position, the projection of the pressure-bearing chassis in the reference plane and the projection of the pressure plate in the reference plane are independent of each other, wherein the reference plane is the plane where the end surface of the base facing away from the workbench is located; When the pressure-bearing chassis is in the second position, the pressure-bearing chassis is located directly below the pressure plate.

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