Durability testing device for valve

Abstract

The utility model discloses a durability testing device for a valve, which comprises a testing table, a supporting plate for placing a valve to be tested is horizontally arranged in the middle of the upper surface of the testing table, clamping components are fixed on two sides of the upper surface of the supporting plate, and a first electric telescopic rod for driving the supporting plate to lift is fixed on the lower surface of the testing table. Vertical rods are fixed to the two sides of the upper surface of the testing table, the top ends of the two vertical rods are jointly and fixedly connected with a top shell, and a vertical shaft penetrates through the middle of the top shell and is rotationally connected with the middle of the top shell through a bearing. According to the utility model, the test bench, the supporting plate, the clamping assembly, the first electric telescopic rod, the top shell, the vertical shaft, the driving assembly and the plugging assembly are arranged, the to-be-tested valve is fixed on the surface of the supporting plate through the clamping assembly, and then the first electric telescopic rod drives the supporting plate to rise, so that the plugging assembly is inserted into a hand wheel at the top of the valve; and then the driving assembly drives the inserting assembly to rotate in a reciprocating mode, the inserting assembly rotates the hand wheel in a reciprocating mode, and continuous opening and closing of the valve are achieved.

Description

Technical Field

[0001] This utility model relates to the field of valve testing technology, and in particular to a valve durability testing device. Background Technology

[0002] Valve durability testing is a crucial method for evaluating the performance stability of valves during long-term use. It aims to simulate frequent operation under real-world conditions, ensuring the valve maintains its normal function after repeated opening and closing. During the test, the valve undergoes repeated opening and closing to check whether its sealing performance, operational flexibility, and structural integrity are affected. Through durability testing, manufacturers can optimize valve design, extend its service life, and provide users with reliable product performance data to help them select suitable valves.

[0003] Existing valve durability testing equipment involves first fixing the valve to the device surface, then inserting a mold connected to the motor output shaft into the valve handwheel. The controller then controls the motor to rotate forward and backward, which in turn drives the valve handwheel to rotate, thus opening and closing the valve. However, testing valves of different sizes requires changing the mold to match the handwheel size, resulting in frequent mold replacements and making the device inflexible and inconvenient to use. Therefore, further improvements are needed. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a valve durability testing device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a valve durability testing device, comprising a test platform, a tray for placing the valve to be tested is horizontally provided in the middle of the upper surface of the test platform, clamping assemblies are fixed on both sides of the upper surface of the tray, a first electric telescopic rod for driving the tray to rise and fall is fixed on the lower surface of the test platform, vertical rods are fixed on both sides of the upper surface of the test platform, and a top shell is fixedly connected to the top ends of the two vertical rods, a vertical shaft is rotatably connected through the middle of the top shell via a bearing, a plug-in assembly is fixedly connected to the bottom end of the vertical shaft, the plug-in assembly includes a rotating block fixedly connected to the bottom end of the vertical shaft, a sliding groove is provided at the bottom of the rotating block, two plug rods for inserting into the valve handwheel are slidably connected inside the sliding groove, a driving assembly for driving the vertical shaft to reciprocate is provided inside the top shell, and a PLC controller is installed on the side of the test platform.

[0006] Furthermore, the top telescopic end of the first electric telescopic rod passes through the test bench and is fixedly connected to the lower surface of the tray, and the first electric telescopic rod is electrically connected to the PLC controller.

[0007] Furthermore, the clamping assembly includes a vertical plate fixed to the upper surface of the pallet, a screw threadedly connected to the top of the vertical plate, a clamping plate rotatably connected to one end of the screw near the center of the pallet via a bearing, and a turntable fixedly connected to the other end of the screw.

[0008] Furthermore, a guide rod is fixedly connected to the side of the clamping plate near the turntable, and the guide rod passes through the vertical plate and is slidably connected to the vertical plate.

[0009] Furthermore, a bidirectional lead screw is rotatably connected inside the slide groove via a bearing. The bidirectional lead screw passes through two insert rods and is rotatably connected to the insert rods via a thread. One end of the bidirectional lead screw extends to the outside of the rotating block and is fixedly connected to a handle.

[0010] Furthermore, rubber pads are fixedly connected to adjacent sides of the bottom ends of the two insertion rods.

[0011] Furthermore, a gear is fixed to the surface of the vertical shaft, and the drive assembly includes a second electric telescopic rod fixed inside the top shell. A rack plate is fixedly connected to the telescopic end of the second electric telescopic rod, and the rack plate meshes with the gear. The second electric telescopic rod is electrically connected to the PLC controller.

[0012] The beneficial effects of this utility model are:

[0013] In use, this utility model provides a valve durability testing device comprising a test platform, a tray, a clamping assembly, a first electric telescopic rod, a top shell, a vertical shaft, a drive assembly, and a plug-in assembly. The clamping assembly secures the valve to be tested to the surface of the tray. The first electric telescopic rod then raises the tray, allowing the plug-in assembly to insert into the handwheel at the top of the valve. The drive assembly then rotates the plug-in assembly reciprocally, enabling the valve to open and close continuously. The distance between the two plug rods of the plug-in assembly is adjustable, facilitating testing of valves of different sizes. It eliminates the need for frequent changes to the valve handwheel mold, making it more flexible and convenient to use. Attached Figure Description

[0014] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 : Overall perspective view of this utility model;

[0016] Figure 2 : Overall sectional view of this utility model;

[0017] Figure 3 The present utility model Figure 2 Enlarged view of point A in the middle.

[0018] The attached figures are labeled as follows:

[0019] 1. Test bench; 2. Support plate; 3. Clamping assembly; 31. Vertical plate; 32. Screw; 33. Clamping plate; 34. Turntable; 35. Guide rod; 4. First electric telescopic rod; 5. Vertical rod; 6. Top shell; 7. Vertical shaft; 71. Gear; 8. Drive assembly; 81. Second electric telescopic rod; 82. Rack plate; 9. Insertion assembly; 91. Rotating block; 92. Slide groove; 93. Bidirectional lead screw; 94. Insert rod; 95. Handle; 96. Rubber pad; 10. PLC controller. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figures 1-3 As shown, a durability testing device for a valve is disclosed, comprising a test bench 1. A tray 2 for placing the valve to be tested is horizontally arranged in the middle of the upper surface of the test bench 1. Clamping components 3 are fixed on both sides of the upper surface of the tray 2. A first electric telescopic rod 4 for driving the tray 2 to rise and fall is fixed on the lower surface of the test bench 1. Vertical rods 5 are fixed on both sides of the upper surface of the test bench 1. A top shell 6 is fixedly connected to the top of the two vertical rods 5. A vertical shaft 7 is rotatably connected through the middle of the top shell 6 via a bearing. A plug-in component 9 is fixedly connected to the bottom of the vertical shaft 7. The plug-in component 9 includes a rotating block 91 fixedly connected to the bottom of the vertical shaft 7. A groove 92 is opened at the bottom of the rotating block 91. Two plug rods 94 for inserting into the valve handwheel are slidably connected inside the groove 92. A drive component 8 for driving the vertical shaft 7 to reciprocate is provided inside the top shell 6. A PLC controller 10 is installed on the side of the test bench 1.

[0022] In this embodiment, the PLC controller 10 adopts a Siemens S7-200 programmable controller, and controls the operation of the first electric telescopic rod 4 and the drive assembly 8 through the PLC controller 10.

[0023] The top telescopic end of the first electric telescopic rod 4 passes through the test bench 1 and is fixedly connected to the lower surface of the support plate 2. The first electric telescopic rod 4 is electrically connected to the PLC controller 10.

[0024] When the valve to be tested is fixed on the surface of the tray 2, the first electric telescopic rod 4 extends and drives the tray 2 to rise, thereby driving the valve to rise, so that the two insertion rods 94 can be inserted into the hollow position of the valve handwheel.

[0025] The clamping assembly 3 includes a vertical plate 31 fixed to the upper surface of the tray 2. A screw 32 is threadedly connected to the top of the vertical plate 31. A clamping plate 33 is rotatably connected to one end of the screw 32 near the center of the tray 2 via a bearing. A turntable 34 is fixedly connected to the other end of the screw 32.

[0026] After placing the valve to be tested on the surface of the support plate 2, the two turntables 34 are rotated alternately, and the screw 32 is used to push the clamping plate 33 to move, thereby using the two clamping plates 33 to squeeze and fix the valve from both sides.

[0027] A guide rod 35 is fixedly connected to the side of the clamping plate 33 near the turntable 34. The guide rod 35 passes through the vertical plate 31 and is slidably connected to the vertical plate 31.

[0028] The guide rod 35 can guide the movement of the clamping plate 33.

[0029] Inside the slide 92, a bidirectional lead screw 93 is rotatably connected via a bearing. The bidirectional lead screw 93 passes through two insert rods 94 and is rotatably connected to the insert rods 94 via a thread. One end of the bidirectional lead screw 93 extends to the outside of the rotating block 91 and is fixedly connected to a handle 95.

[0030] By rotating the handle 95 outside the rotating block 91, the double-acting screw 93 is rotated using the handle 95. The double-acting screw 93 drives the two insert rods 94 to slide along the slide groove 92, and the two insert rods 94 slide in opposite directions. This achieves the adjustment of the distance between the two insert rods 94, ensuring that the insert rods 94 can be inserted into the hollow position of the handwheel at the top of the valve and close to the valve stem.

[0031] Rubber pads 96 are fixedly connected to the adjacent sides of the bottom ends of the two insertion rods 94.

[0032] Rubber pad 96 increases the friction between the plunger 94 and the valve handwheel.

[0033] A gear 71 is fixed on the surface of the vertical shaft 7. The drive assembly 8 includes a second electric telescopic rod 81 fixed inside the top shell 6. A rack plate 82 is fixedly connected to the telescopic end of the second electric telescopic rod 81. The rack plate 82 meshes with the gear 71. The second electric telescopic rod 81 is electrically connected to the PLC controller 10.

[0034] By controlling the second electric telescopic rod 81 to extend and retract repeatedly through the PLC controller 10, the rack plate 82 can be driven to move back and forth, thereby driving the gear 71 to rotate back and forth, thus realizing the reciprocating rotation of the vertical shaft 7, which in turn drives the plug-in assembly 9 to rotate back and forth.

[0035] Working principle: First, place the valve to be tested on the surface of the support plate 2 and fix it with the clamping assembly 3 so that the valve's handwheel is located below the plug-in assembly 9. At this time, the distance between the two plug rods 94 of the plug-in assembly 9 can be adjusted according to the size of the valve's handwheel so that the two plug rods 94 can be inserted into the hollow position of the valve's handwheel. When testing the same type of valve in the future, it is not necessary to adjust the distance between the two plug rods 94 again. After the adjustment is completed, the first electric telescopic rod 4 is started to drive the support plate 2 to rise, so that the two plug rods 94 are inserted into the hollow position of the valve's handwheel. Then, the PLC controller 10 controls the second electric telescopic rod 81 to reciprocate, thereby driving the vertical shaft 7 and the plug-in assembly 9 to reciprocate. The two plug rods 94 are used to turn the valve handwheel to reciprocate forward and reverse, thereby driving the valve to open and close, thus realizing the durability test.

[0036] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A device for testing the durability of a valve, comprising a test bench (1), characterized in that: The middle part of the upper surface of the test platform (1) is horizontally provided with a supporting plate (2) for placing the valve to be tested, both sides of the upper surface of the supporting plate (2) are fixedly provided with clamping assemblies (3), the lower surface of the test platform (1) is fixedly provided with a first electric telescopic rod (4) for driving the supporting plate (2) to lift, both sides of the upper surface of the test platform (1) are fixedly provided with vertical rods (5), the top ends of the two vertical rods (5) are fixedly and jointly connected with a top shell (6), a vertical shaft (7) penetrates through the middle part of the top shell (6) and is rotatably connected with the top shell (6) through a bearing, the bottom end of the vertical shaft (7) is fixedly connected with a plug-in assembly (9), the plug-in assembly (9) comprises a rotating block (91) fixedly connected with the bottom end of the vertical shaft (7), a sliding groove (92) is formed in the bottom of the rotating block (91), two plug-in rods (94) are slidably connected in the sliding groove (92) and are inserted into the valve handle, the inside of the top shell (6) is provided with a driving assembly (8) for driving the vertical shaft (7) to reciprocatingly rotate, and a PLC controller (10) is mounted on the side of the test platform (1).

2. The valve durability testing apparatus according to claim 1, characterized by: The top telescopic end of the first electric telescopic rod (4) penetrates through the test platform (1) and is fixedly connected with the lower surface of the supporting plate (2), and the first electric telescopic rod (4) is electrically connected with the PLC controller (10).

3. The valve durability testing apparatus of claim 1, wherein: The clamping assembly (3) comprises a vertical plate (31) fixedly connected with the upper surface of the supporting plate (2), a screw rod (32) penetrates through and is threadedly rotatably connected with the top of the vertical plate (31), a clamping plate (33) is rotatably connected with the screw rod (32) near the center of the supporting plate (2) through a bearing, and a rotating disc (34) is fixedly connected with the other end of the screw rod (32).

4. A valve durability testing apparatus according to claim 3, wherein: The clamping plate (33) is fixedly connected with a guide rod (35) on the side close to the rotating disc (34), the guide rod (35) penetrates through the vertical plate (31) and is slidably connected with the vertical plate (31).

5. The valve durability testing apparatus of claim 1, wherein: A bidirectional screw rod (93) is rotatably connected in the sliding groove (92), the bidirectional screw rod (93) penetrates through the two plug-in rods (94) and is threadedly rotatably connected with the plug-in rods (94), one end of the bidirectional screw rod (93) extends to the outside of the rotating block (91) and is fixedly connected with a handle (95).

6. A valve durability testing apparatus according to claim 5, wherein: Rubber pads (96) are fixedly connected with the adjacent sides of the bottom ends of the two plug-in rods (94).

7. The valve durability testing apparatus of claim 1, wherein: A gear (71) is fixedly connected with the surface of the vertical shaft (7), the driving assembly (8) comprises a second electric telescopic rod (81) fixedly connected with the inside of the top shell (6), a rack plate (82) is fixedly connected with the telescopic end of the second electric telescopic rod (81), the rack plate (82) is engaged with the gear (71), and the second electric telescopic rod (81) is electrically connected with the PLC controller (10).

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