Testing device of plunger valve

Abstract

The plunger valve testing device is simple in structure and capable of conducting automatic testing and comprises a plunger valve body, a valve deck and a fixing plate, the valve deck and the fixing plate are arranged on the plunger valve body, a water inlet channel and a water outlet channel are formed in the plunger valve body, a valve seat is arranged between the water inlet channel and the water outlet channel, and the fixing plate is arranged on the valve deck. A valve rod is arranged at the position, located at the valve seat, of the valve body in a sliding and penetrating mode, the valve rod penetrates out of the valve deck, a fixing rod is arranged on the fixing plate, the other end of the fixing rod is arranged on the valve deck through a fixing device, an air cylinder is arranged on the fixing plate, and an extension rod of the air cylinder is connected with the valve rod through a connecting device. And a counter for counting the working times of the extension bar of the cylinder is arranged on the fixed plate.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and in particular to a testing device for a plunger valve. Background Technology

[0002] When a plunger valve is in use, the friction between the valve stem and the valve seat during opening and closing causes wear on the valve stem, which in turn affects the valve stem's sealing performance. Therefore, after the plunger valve is manufactured, the durability of the valve stem needs to be tested to obtain a qualified product. This invention was developed to facilitate such testing. Summary of the Invention

[0003] Therefore, in view of the above problems, the present invention proposes a simple and automated testing device for plunger valves.

[0004] To solve the above-mentioned technical problems, the solution adopted by the present invention is as follows: a testing device for a plunger valve, comprising a plunger valve body, a valve cover disposed on the plunger valve body, and a fixing plate. The plunger valve body is provided with an inlet channel and an outlet channel, and a valve seat is provided between the inlet channel and the outlet channel. A valve stem is slidably disposed on the valve body at the valve seat position, and the valve stem extends out of the valve cover. A fixing rod is provided on the fixing plate, and the other end of the fixing rod is disposed on the valve cover by a fixing device. A cylinder is provided on the fixing plate, and the extension rod of the cylinder is connected to the valve stem by a connecting device. A counter for counting the number of times the extension rod of the cylinder operates is provided on the fixing plate.

[0005] A further improvement is that the connecting device includes a first connecting block and a second connecting block. The first connecting block is threadedly sleeved on the cylinder's extension rod, and the second connecting block is threadedly sleeved on the valve stem. The first connecting block is provided with a socket rod, and the second connecting block is provided with a socket channel. The socket rod passes through the socket channel, and the second connecting block is provided with an anti-detachment device to prevent the socket rod from detaching from the socket channel.

[0006] A further improvement is that the anti-detachment device includes an anti-detachment rod with an inclined surface at the end, and the socket rod has an anti-detachment groove matching the end of the anti-detachment rod. The second connecting block is provided with a pushing device to push the anti-detachment rod to slide.

[0007] A further improvement is made to the pushing device, which includes a first pushing plate and a second pushing plate. The first pushing plate is mounted on the anti-detachment rod. A C-shaped hydraulic channel is provided in the second connecting block. A sliding rod is slidably mounted on the second connecting block. One end of the sliding rod is located in the socket channel, and the other end of the sliding rod is located at the other end of the hydraulic channel. The second pushing plate is mounted on the sliding rod. Hydraulic oil is provided in the hydraulic channel and is located between the first and second pushing plates. The second connecting block is provided with a release device for releasing the socket rod from the socket channel. The anti-detachment rod is provided with a first return device for returning the anti-detachment rod to its original position, and the sliding rod is provided with a second return device for returning the sliding rod to its original position.

[0008] A further improvement is made to the release device, wherein the bottom of the second connecting block is provided with a receiving channel, one end of the receiving channel is connected to the hydraulic channel, the other end of the receiving channel is connected to the outside, and a sealing plug is provided in the receiving channel with internal thread connection and the sealing plug completely fills the receiving channel.

[0009] A further improvement is that the sliding rod is provided with a top plate, which is located in the socket channel.

[0010] A further improvement is that the first return device is a first spring, which is sleeved on the anti-disengagement rod. One end of the first spring is connected to the first push plate, and the other end of the first spring is connected to the inner wall of the hydraulic channel.

[0011] A further improvement is that the second return device is a second spring, which is sleeved on the sliding rod. One end of the second spring is connected to the second push plate, and the other end of the second spring is connected to the inner wall of the hydraulic channel.

[0012] By adopting the aforementioned technical solution, the beneficial effects of the present invention are: It features a simple structure and can automatically test the wear resistance of valve stems. A cylinder automatically drives the valve stem to slide, and a counter counts the movements, automatically detecting the wear resistance of the valve stem. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a test device for a plunger valve according to an embodiment of the present invention.

[0014] Figure 2 This is an enlarged structural schematic diagram of section A in embodiment A of the present invention. Detailed Implementation

[0015] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0016] refer to Figure 1-2The present invention discloses a testing device for a plunger valve, comprising a plunger valve body 1, a valve cover 4 disposed on the plunger valve body 1, and a fixing plate 9. The plunger valve body 1 has an inlet channel and an outlet channel, and a valve seat 2 is disposed between the inlet channel and the outlet channel. A valve stem 3 is slidably disposed on the valve body at the valve seat 2, and the valve stem 3 protrudes from the valve cover 4. A fixing rod 5 is disposed on the fixing plate 9. Specifically, the fixing rod 5 has threads at one end and is locked to the fixing plate 9 by a nut. The other end of the fixing rod 5 is disposed on the valve cover 4. Specifically, the fixing rod 5 has threads at one end and is locked to the valve cover 4 by a nut. A cylinder 10 is disposed on the fixing plate 9. The extension rod 8 of the cylinder 10 is connected to the valve stem 3 by a connecting device. A counter is disposed on the fixing plate 9 for counting the number of times the extension rod 8 of the cylinder 10 operates.

[0017] Specifically, the connecting device includes a first connecting block 6 and a second connecting block 7. The first connecting block 6 is threadedly sleeved on the extension rod 8 of the cylinder 10, and the second connecting block 7 is threadedly sleeved on the valve stem 3. The first connecting block 6 is provided with a socket rod 81, and the second connecting block 7 is provided with a socket channel. The socket rod 81 passes through the socket channel, and the second connecting block 7 is provided with an anti-detachment device to prevent the socket rod 81 from disengaging from the socket channel.

[0018] Preferably, the anti-detachment device includes an anti-detachment rod 15, a first push plate 16, and a second push plate 12. The anti-detachment rod 15 has an inclined surface at its end, and the socket rod 81 has an anti-detachment groove matching the end of the anti-detachment rod 15. The first push plate 16 is mounted on the anti-detachment rod 15. A C-shaped hydraulic channel 14 is formed within the second connecting block 7. A sliding rod 10 slides through the second connecting block 7, with one end of the sliding rod 10 located within the socket channel and the other end located at the other end of the hydraulic channel 14. The second push plate 12 is mounted on the sliding rod 10. Hydraulic oil is contained within the hydraulic channel 14, located between the first push plate 16 and the second push plate 12. The bottom of the second connecting block 7 has an opening... The device has a receiving channel, one end of which is connected to the hydraulic channel 14, and the other end of which is connected to the outside. The receiving channel is internally threaded with a sealing plug 13, which completely fills the receiving channel. The anti-detachment rod 15 is provided with a first spring that returns the anti-detachment rod 15 to its original position. The first spring is sleeved on the anti-detachment rod 15. One end of the first spring is connected to the first push plate 16, and the other end of the first spring is connected to the inner wall of the hydraulic channel 14. The sliding rod 10 is provided with a second spring 11 that returns the sliding rod 10 to its original position. The second spring 11 is sleeved on the sliding rod 10. One end of the second spring 11 is connected to the second push plate 12, and the other end of the second spring 11 is connected to the inner wall of the hydraulic channel 14.

[0019] In order to better push the sliding rod 10 to slide, the sliding rod 10 is provided with a top plate 9, which is located in the socket channel.

[0020] Working principle: When the valve stem 3 is to be tested, the fixing rod 5 is locked onto the valve cover 4, and then the second connecting block 7 is threaded onto the end of the valve stem 3. The first connecting block 6 is locked onto the extension rod 8 of the cylinder 10, and then the fixing plate 9 is locked onto the other end of the fixing rod 5. When the fixing plate 9 is placed onto the fixing rod 5, the socket rod 81 on the first connecting block 6 is inserted into the socket channel. Then the socket rod 81 presses against the top plate 9, causing the sliding rod 10 to slide. The sliding rod 10 slides downward, driving the second push rod to slide, thereby promoting the hydraulic flow in the hydraulic channel 14. Then the hydraulic oil pushes the first push plate 16 to slide. The first push plate 16 drives the anti-detachment rod 15 to slide. As the socket rod 81 moves downward, the anti-detachment rod 15 gradually slides into the anti-detachment groove, thereby restricting the socket rod 81 so that the socket rod 81 will not detach from the socket channel. At this time, the first spring is compressed and the second spring 11 is stretched. Then, cylinder 10 starts working. The extension rod 8 of cylinder 10 returns to its original position, causing one end of valve stem 3 to slide out of valve cover 4. Then, the extension rod 8 of cylinder 10 extends again, causing valve stem 3 to slide back in. Then, the counter counts once. This operation is repeated, which can automatically measure the number of times valve stem 3 can withstand wear, thereby detecting whether the plunger valve is qualified, greatly facilitating the operation of the staff. After the test is completed, the sealing plug 13 is rotated, allowing hydraulic fluid to flow into the receiving channel. Then, the first spring returns to its original position, causing the anti-disengagement rod 15 to return to its original position, thereby disengaging the anti-disengagement rod 15 from the socket rod 81. Then, the fixing rod 5 and fixing plate 9 can be directly removed. Then, the socket rod 81 is disengaged from the socket channel. Then, the second spring 11 returns to its original position, causing the second push plate 12 to return to its original position, and then the sealing plug 13 returns to its original position for the next use.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions above are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A testing device for a plunger valve, comprising a plunger valve body and a valve cover disposed on the plunger valve body, wherein the plunger valve body has an inlet channel and an outlet channel, a valve seat is disposed between the inlet channel and the outlet channel, and a valve stem is slidably disposed on the valve body at the valve seat position, the valve stem extending out of the valve cover, characterized in that: It also includes a fixing plate, on which a fixing rod is provided. The other end of the fixing rod is fixed to the valve cover by a fixing device. A cylinder is provided on the fixing plate. The extension rod of the cylinder is connected to the valve rod by a connecting device. A counter for counting the number of times the extension rod of the cylinder operates is provided on the fixing plate.

2. The testing device for a plunger valve according to claim 1, characterized in that: The connecting device includes a first connecting block and a second connecting block. The first connecting block is threadedly sleeved on the extension rod of the cylinder, and the second connecting block is threadedly sleeved on the valve stem. The first connecting block is provided with a socket rod, and the second connecting block is provided with a socket channel. The socket rod passes through the socket channel, and the second connecting block is provided with an anti-detachment device to prevent the socket rod from detaching from the socket channel.

3. The testing device for a plunger valve according to claim 2, characterized in that: The anti-detachment device includes an anti-detachment rod with an inclined surface at the end of the anti-detachment rod, and a matching anti-detachment groove at the end of the receiving rod. The second connecting block is provided with a pushing device that pushes the anti-detachment rod to slide.

4. The testing device for a plunger valve according to claim 3, characterized in that: The pushing device includes a first pushing plate and a second pushing plate. The first pushing plate is disposed on the anti-detachment rod. A C-shaped hydraulic channel is opened in the second connecting block. A sliding rod is slidably disposed on the second connecting block. One end of the sliding rod is located in the socket channel, and the other end of the sliding rod is located at the other end of the hydraulic channel. The second pushing plate is disposed on the sliding rod. Hydraulic oil is disposed in the hydraulic channel and is located between the first pushing plate and the second pushing plate. The second connecting block is provided with a release device for releasing the socket rod from the socket channel. The anti-detachment rod is provided with a first return device for returning the anti-detachment rod to its original position, and the sliding rod is provided with a second return device for returning the sliding rod to its original position.

5. The testing device for a plunger valve according to claim 4, characterized in that: The release device is as follows: the bottom of the second connecting block has a receiving channel, one end of the receiving channel is connected to the hydraulic channel, the other end of the receiving channel is connected to the outside, and a sealing plug is threadedly connected to the receiving channel and the sealing plug completely fills the receiving channel.

6. The testing device for a plunger valve according to claim 4, characterized in that: The sliding rod is provided with a top plate, which is located in the socket channel.

7. The testing device for a plunger valve according to claim 4, characterized in that: The first return device is a first spring, which is sleeved on the anti-disengagement rod. One end of the first spring is connected to the first push plate, and the other end of the first spring is connected to the inner wall of the hydraulic channel.

8. The testing device for a plunger valve according to claim 4, characterized in that: The second return device is a second spring, which is sleeved on the sliding rod. One end of the second spring is connected to the second push plate, and the other end of the second spring is connected to the inner wall of the hydraulic channel.

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