A sealing detection device for valve production

Abstract

The application discloses a sealing detection device for valve production, which comprises a base, two supports fixed on the base, transmission rollers installed on the supports, two transmission rollers connected through a conveying belt, a limiting detection mechanism for limiting and detecting the sealing of the valve arranged on the conveying belt, a fixing frame fixed on the base, an electric push rod fixed on the fixing frame, a piston cylinder arranged below the electric push rod, and a hemispherical sealing block for sealing the upper end of the valve fixed on the bottom of the piston cylinder. The application avoids the problem that water stains caused by taking out the valve from water for detection contaminate the working environment, and the sealing detection of the valve is more accurate. The application is more practical and applicable in combination with the assembly line for detecting the valve, and the water in the valve can be cleaned, so that the subsequent processing is not affected.

Description

Technical Field

[0001] The present invention relates to the technical field of valve processing, in particular to a tightness detection device for valve production. Background Art

[0002] A valve is a control component in a fluid delivery system, with functions such as shutting off, regulating, diverting, preventing reverse flow, stabilizing pressure, splitting flow or relieving overflow pressure; the sealing performance of a valve refers to the ability of each sealing part of the valve to prevent medium leakage, which is the most important technical performance indicator of the valve. After the valve is processed, in order to ensure product quality, sampling inspection is required to test the air tightness of the valve; at present, the tightness detection of the valve body is generally completed manually. Before the tightness detection, workers need to manually load and seal the valve, which is relatively slow in operation and affects the valve detection speed.

[0003] The prior art discloses a tightness detection device for valve production with the application number CN202310275130.5, which includes a base; a water tank and a lifting device are fixedly installed on the base; a lifting plate is slidably installed in the water tank; the lifting device drives the lifting plate to slide in the water tank; a fixing device is installed on the upper end surface of the lifting plate; the fixing device is used for fixing the valve to be tested; a conveying device is installed on the base; the conveying device is used for conveying the valve to be tested to the fixing device; pressure generating devices are installed on both sides of the lifting plate; connecting devices are installed on both sides of the base; the connecting devices are used for connecting the pressure generating devices and the valve to be tested.

[0004] The above-mentioned prior art has the following disadvantages: the valve to be tested is immersed in water by the lifting device; the air flow is transmitted to the inside of the valve to be tested by the pressure generating device. Under the condition that the valve to be tested is kept in a closed state and immersed in water, if the air flow passes through the inside of the valve to be tested and no bubbles emerge from the valve to be tested, it means that the sealing performance of the valve to be tested is qualified; if bubbles emerge, it means that the sealing performance of the valve to be tested is unqualified, which can accurately detect the tightness of the valve; after such detection is completed, the outside of the valve has water, which will cause more water stains when moved to other places, making the ground wet and slippery, posing certain safety hazards, and increasing the workload of cleaning for the staff in the later stage; secondly, after the valve is placed in water, bubbles may be generated at the corners, and such bubbles may affect the judgment of the staff, leading to inaccurate judgment; in view of this, the present application proposes a tightness detection device for valve production. Contents of the Invention

[0005] The purpose of the present invention is to solve the above technical problems, and to propose a tightness detection device for valve production.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions: A valve sealing test device includes a base with two supports fixed on it. A transmission roller is mounted on each support and connected to a conveyor belt. The conveyor belt has a limit detection mechanism for limiting valve movement and testing valve sealing. A fixed frame is fixed on the base, and an electric push rod is fixed on the fixed frame. A piston cylinder is located below the electric push rod, and a hemispherical sealing block for sealing the upper end of the valve is fixed at the bottom of the piston cylinder. A piston that cooperates with the output end of the electric push rod to inject colored water into the valve is slidably connected inside the piston cylinder. The piston's return to its original position allows the water inside the valve to be recovered. A transmission mechanism connected to the output end of the electric push rod is mounted on the fixed frame to drive the conveyor belt to rotate and transport the valve. When the output end of the electric push rod moves downward, the conveyor belt remains stationary; when the electric push rod moves upward, the conveyor belt moves to transport the valve equidistantly.

[0007] Preferably, the limiting detection mechanism includes a plurality of limiting rings fixed on the conveyor belt and distributed at equal intervals, and a limiting post coaxially arranged with the limiting rings is fixed on the conveyor belt, with absorbent paper glued to the upper end of the limiting post.

[0008] Preferably, a spring is fixed to the bottom of the piston, the lower end of the spring is fixedly connected to the piston cylinder, a water injection pipe and a water suction pipe are fixed to the bottom of the piston cylinder, the water injection pipe and the water suction pipe pass through the hemispherical sealing block and are fixedly connected to it, and a connecting rod is fixed to the upper end of the piston, the connecting rod is fixedly connected to the output end of the electric push rod.

[0009] Preferably, the length of the water injection pipe is shorter than the length of the water suction pipe, and a pressure relief valve is installed on the water injection pipe, while a one-way valve is installed on the water suction pipe. The one-way valve only allows clean water to enter the piston cylinder through the water suction pipe.

[0010] Preferably, the transmission mechanism includes a connecting rod fixed to the output end of the electric push rod, a rack plate fixed to the other end of the connecting rod, a short rod rotatably connected to the fixed frame, a transmission gear fixedly connected to the short rod, the transmission gear meshing with the rack plate, a short shaft coaxially fixedly connected to the transmission roller, a one-way bearing fixed to the short shaft, a driven gear fixed to the one-way bearing, and the driven gear meshing with the transmission gear.

[0011] Preferably, the fixing frame is arranged in an inverted U-shape, and a through groove is provided on the fixing frame, through which the connecting rod is arranged.

[0012] Preferably, the device further includes a cleaning mechanism for removing residual water inside the valve. The cleaning mechanism includes a support plate fixed to a mounting frame. A collection cylinder is fixed to the bottom of the support plate. A hollow screw is threaded onto the support plate. A hollow block is fixed to the bottom of the hollow screw. A balloon communicating with the hollow block is sealed around its outer wall. Multiple sponge balls are fixed to the outer wall of the balloon. A hollow rod is fixed to the upper end of the hollow screw. A rotary joint is installed on the hollow rod. A bent rod is fixed to the upper end of the rotary joint. An installation rod is fixed to the other end of the bent rod. The installation rod is fixedly connected to the output end of an electric push rod. A compression plate is fixedly connected to the installation rod. An air bladder opposite to the compression plate is fixedly connected to the support plate. The air bladder is connected to the rotary joint via a delivery pipe.

[0013] Preferably, the collecting cylinder includes an outer ring and an inner ring, the bottoms of the outer ring and the inner ring are sealed by a support ring, and the height of the outer ring is greater than the height of the inner ring.

[0014] Compared with the prior art, the beneficial effects of this invention are as follows: 1. Attach the valve of the closed valve plate to the limit post and place it inside the limit ring to limit the valve and ensure that the absorbent paper is tightly attached to the valve plate, which can make the valve plate detection more accurate.

[0015] 2. The electric push rod drives the connecting rod and piston to move down and squeeze the spring. As the pressure inside the piston cylinder increases, the pressure inside the piston cylinder eventually exceeds the threshold of the pressure relief valve. Colored water is injected into the valve through the water injection pipe, which increases the pressure inside the valve. The sealing performance of the valve can be tested by using absorbent paper to determine the sealing performance of the valve plate.

[0016] 3. The rotation of the transmission gear drives the driven gear to rotate. Under the action of the one-way bearing, the driven gear and the short shaft rotate relative to each other. In other words, the short shaft and the transmission roller remain stationary. This keeps the conveyor belt stationary, which ensures the stability of the valve sealing test.

[0017] 4. Since the spring is in a compressed state, the connecting rod moves upward, causing the piston to move upward. This allows the clean water inside the valve to be drawn into the piston cylinder through the suction pipe, realizing the recovery of clean water, which can be reused, and also cleaning the clean water inside the valve.

[0018] 5. When the extrusion plate extrudes the air bladder, air can be delivered to the balloon through the delivery pipe, hollow rod, hollow screw, and hollow block. The balloon expands, causing the sponge ball to press against the inner wall of the valve, which can completely absorb the water remaining inside the valve. This avoids the problem of water remaining when moving the valve later, which would cause inconvenience, and provides convenience for subsequent processing.

[0019] 6. The hollow screw and support plate are reconnected. The hollow screw drives the hollow block and balloon to rotate. In this way, the centrifugal force can be used to shake the water off the sponge ball and collect it through the collection tube, which also prepares for better cleaning of the valve to remove residual water next time.

[0020] In summary, this invention avoids the problem of water stains causing a messy working environment after the valve is removed from water during testing. It also provides more accurate valve sealing tests, is more practical and useful when used in conjunction with assembly line valve testing, and can clean the water inside the valve without affecting subsequent processing. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the sealing performance testing device for valve production proposed in this invention; Figure 2 This is a schematic diagram of the rack plate in a valve manufacturing sealing test device proposed in this invention. Figure 3 This is a cross-sectional view of the collection cylinder in a valve manufacturing sealing test device proposed in this invention; Figure 4 This is a schematic diagram of the hollow screw in a valve manufacturing sealing test device proposed in this invention. Figure 5 This is a side view of a sealing performance testing device for valve manufacturing proposed in this invention; Figure 6 This is a cross-sectional view of the piston cylinder in a valve manufacturing sealing test device proposed in this invention.

[0022] In the diagram: 1. Base, 2. Bracket, 3. Drive roller, 4. Conveyor belt, 5. Limiting ring, 6. Limiting post, 7. Absorbent paper, 8. Fixing frame, 9. Electric push rod, 10. Connecting rod, 11. Mounting rod, 12. Extrusion plate, 13. Bend rod, 14. Rotary joint, 15. Airbag, 16. Hollow rod, 17. Support plate, 18. Collection cylinder, 19. Rack plate, 20. Drive gear, 21. Short rod, 22. Short shaft, 23. One-way bearing, 24. Driven gear, 25. Hollow block, 26. Hollow screw, 27. Balloon, 28. Connecting rod, 29. Piston cylinder, 30. Hemispherical sealing block, 31. Suction pipe, 32. Injection pipe, 33. Piston, 34. Spring, 35. One-way valve, 36. Pressure relief valve, 37. Limiting plate, 38. Conveying pipe. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0024] Reference Figures 1-6A valve manufacturing sealing test device includes a base 1, two supports 2 fixed on the base 1, and transmission rollers 3 mounted on the supports 2. The two transmission rollers 3 are connected by a conveyor belt 4. The length of the conveyor belt 4 is not shown in the figure, and the two sides can be extended. A limit plate 37 is fixed on the fixed frame 8. The limit plate 37 abuts against the bottom of the conveyor belt 4 to support the valve being squeezed. The conveyor belt 4 is provided with a limit detection mechanism for limiting the valve and detecting the valve sealing. The limit detection mechanism includes multiple limit rings 5 ​​fixed on the conveyor belt 4 and evenly distributed. A limit post 6 is fixed on the conveyor belt 4 and coaxially arranged with the limit rings 5. The upper end of the limit post 6 is glued with absorbent paper 7. When the valve is placed in the limit ring 5 and fastened to the limit post 6, the absorbent paper 7 abuts against the valve plate on the valve. If the valve plate is not well sealed, colored water will pass through the valve plate and be absorbed by the absorbent paper 7, leaving colored marks on the absorbent paper 7. A mounting bracket 8 is fixed on the base 1, and an electric push rod 9 is fixed on the mounting bracket 8. A piston cylinder 29 is located below the electric push rod 9. A hemispherical sealing block 30, which seals the upper end of the valve, is fixed to the bottom of the piston cylinder 29. A piston 33, which works with the output end of the electric push rod 9 to inject colored water into the valve, is slidably connected inside the piston cylinder 29. The piston 33's reset function recovers the water inside the valve. A specific explanation of the cooperation between the piston 33 and the electric push rod 9 is as follows: A spring 34 is fixed to the bottom of the piston 33, and the lower end of the spring 34 is connected to the piston cylinder 29. 9. Fixed connection: The bottom of the piston cylinder 29 is fixed with a water injection pipe 32 and a water suction pipe 31. The water injection pipe 32 and the water suction pipe 31 pass through the hemispherical sealing block 30 and are fixedly connected to it. The upper end of the piston 33 is fixed with a connecting rod 28, which is fixedly connected to the output end of the electric push rod 9. The length of the water injection pipe 32 is less than the length of the water suction pipe 31. A pressure relief valve 36 is installed on the water injection pipe 32, and a one-way valve 35 is installed on the water suction pipe 31. The one-way valve 35 only allows clean water to enter the piston cylinder 29 through the water suction pipe 31. A transmission mechanism is installed on the fixed frame 8, which is connected to the output end of the electric push rod 9 to drive the conveyor belt 4 to rotate and convey the valve. The transmission mechanism includes a connecting rod 10 fixed to the output end of the electric push rod 9. The fixed frame 8 is arranged in an inverted U-shape, and a through groove is provided through the fixed frame 8. The connecting rod 10 is provided through the through groove. A rack plate 19 is fixed to the other end of the connecting rod 10. A short rod 21 is rotatably connected to the fixed frame 8. A transmission gear 20 is fixedly connected to the short rod 21. The transmission gear 20 meshes with the rack plate 19. A short shaft 22 is coaxially fixedly connected to the transmission roller 3. A one-way bearing 23 is fixed to the short shaft 22. A driven gear 24 is fixed to the one-way bearing 23. The driven gear 24 meshes with the transmission gear 20. When the output end of the electric push rod 9 moves down, the conveyor belt 4 remains stationary. When the electric push rod 9 moves up, the conveyor belt 4 moves to convey the valve at a distance. This includes a cleaning mechanism for removing residual water inside the valve. The cleaning mechanism comprises a support plate 17 fixed to a mounting frame 8. A collection cylinder 18 is fixed to the bottom of the support plate 17. A hollow screw 26 is threaded onto the support plate 17. A hollow block 25 is fixed to the bottom of the hollow screw 26. A balloon 27, communicating with the hollow block 25, is sealed around the outer wall of the hollow block 25. Multiple sponge balls are fixed to the outer wall of the balloon 27. A hollow rod 16 is fixed to the upper end of the hollow screw 26. A rotary joint 14 is installed on the hollow rod 16. A bent rod 13 is fixed to the upper end of the head 14, and an installation rod 11 is fixed to the other end of the bent rod 13. The installation rod 11 is fixedly connected to the output end of the electric push rod 9. A squeezing plate 12 is fixedly connected to the installation rod 11. An air bladder 15 opposite to the squeezing plate 12 is fixedly connected to the support plate 17. The air bladder 15 is connected to the rotary joint 14 through the delivery pipe 38. The collecting cylinder 18 includes an outer ring and an inner ring. The bottom of the outer ring and the inner ring are sealed by a support ring. The height of the outer ring is greater than the height of the inner ring, so that a collection chamber can be formed to collect clean water.

[0025] When using this invention, the operator or a robotic arm will fasten the valve of the valve plate to the limiting post 6 and place it inside the limiting ring 5, thus completing the limiting of the valve. The electric push rod 9 drives the connecting rod 28, piston 33, piston cylinder 29, and hemispherical sealing block 30 to move downwards. The downward movement of the hemispherical sealing block 30 drives the water injection pipe 32 and water suction pipe 31 to move downwards. Finally, the hemispherical sealing block 30 abuts against the upper end of the valve. The water injection pipe 32 and water suction pipe 31 are located inside the valve. As the output end of the electric push rod 9 moves downwards, the connecting rod 28 drives the piston 33 to move downwards and compress the spring 34. As the pressure inside the piston cylinder 29 increases, the clamping force between the hemispherical sealing block 30 and the valve increases, thereby achieving a seal on the upper end of the valve. Finally, the pressure inside the piston cylinder 29 exceeds the threshold of the pressure relief valve 36. Colored water is injected into the valve through the water injection pipe 32, which increases the pressure inside the valve. After a period of stillness, the exact time can be determined according to the actual situation to test the valve's sealing performance. The output end of the electric push rod 9 moves down, causing the connecting rod 10 and the rack plate 19 to move down. The downward movement of the rack plate 19 causes the transmission gear 20 to rotate. The rotation of the transmission gear 20 causes the driven gear 24 to rotate. Under the action of the one-way bearing 23, the driven gear 24 and the short shaft 22 rotate relative to each other. That is to say, the short shaft 22 and the transmission roller 3 remain stationary. In this way, the conveyor belt 4 remains stationary, which can ensure the stability of the valve sealing test. Finally, the rack plate 19 separates from the transmission gear 20. After the test is completed, the electric push rod 9 is activated to reset it. The output end of the electric push rod 9 moves upward, causing the connecting rod 10 and the connecting rod 28 to move upward. Since the spring 34 is in a compressed state, the connecting rod 28 moves upward, causing the piston 33 to move upward. In this way, the clean water in the valve can be sucked into the piston cylinder 29 through the suction pipe 31 to realize the recycling of clean water. When the water injection pipe 32 and the water suction pipe 31 disengage from the valve, the rack plate 19 meshes with the transmission gear 20. The movement of the rack plate 19 drives the transmission gear 20 to rotate, and the rotation of the transmission gear 20 drives the driven gear 24 to rotate. Under the action of the one-way bearing 23, the driven gear 24 rotates synchronously with the short shaft 22, thereby realizing the rotation of the transmission roller 3, which can drive the conveyor belt 4 to move, so as to transport the tested valve. When the output end of the electric push rod 9 is reset, another valve that needs to be tested is located directly below the hemispherical sealing block 30 for preparation. Since the suction pipe 31 cannot recover all the water inside the valve, when testing the valve after delivery, the output end of the electric push rod 9 drives the mounting rod 11, the bent rod 13, the extrusion plate 12, the hollow rod 16, and the hollow screw 26 to move downwards. The downward movement of the hollow screw 26 drives the hollow block 25 and the balloon 27 to move downwards and extend into the valve. The hollow screw 26 rotates when it passes through the support plate 17. The support plate 17 has a through groove with a limit block that mates with the thread. Similar to the principle of a hand-pushed flying fairy, the rotation of the hollow screw 26 drives the rotation of the hollow block 25 and the balloon 27. When the extrusion plate 12 extrudes the air bladder 15, air can be delivered through the delivery pipe 38 through the hollow rod 16, the hollow screw 26, and the hollow block 25 to the balloon 27. The balloon 27 expands, causing the sponge ball to press against the inner wall of the valve, which can completely absorb the water remaining inside the valve. This avoids the problem of water remaining when moving the valve later, which would cause inconvenience, and provides convenience for subsequent processing. When balloon 27 is below the upper end of the inner ring, the hollow screw 26 disengages from the support plate 17, and the hollow rod 16 moves down through the through groove. When the output end of the electric push rod 9 is reset, the airbag 15 is no longer squeezed and reset. A reset spring can be set inside the airbag 15 so that the balloon 27 no longer inflates and can be removed from the valve. As the output end of the electric push rod 9 is reset, the hollow screw 26 and the support plate 17 are connected again. The hollow rod 16 drives the hollow block 25 and the balloon 27 to rotate. In this way, the water on the sponge ball can be thrown out by centrifugal force and collected by the collection cylinder 18, which also prepares for better cleaning of the valve to remove the residual water next time. As mentioned above, intermittent valve operation and sealing tests can be performed. Subsequently, staff can manually or mechanically remove the tested valve. If water appears on the absorbent paper 7, it indicates that the valve plate is not sealing well. If no water appears on the absorbent paper 7, it indicates that the valve is sealing well. If water appears on the absorbent paper 7, the staff can manually remove the absorbent paper 7 and replace it with a new one.

[0026] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A sealing performance testing device for valve manufacturing, comprising a base (1), characterized in that, Two brackets (2) are fixed on the base (1). A transmission roller (3) is installed on the bracket (2). The two transmission rollers (3) are connected by a conveyor belt (4). A limit detection mechanism for limiting the valve and detecting the valve's sealing performance is provided on the conveyor belt (4). A fixing frame (8) is fixed on the base (1). An electric push rod (9) is fixed on the fixing frame (8). A piston cylinder (29) is provided below the electric push rod (9). A hemispherical sealing block for sealing the upper end of the valve is fixed at the bottom of the piston cylinder (29). (30) A piston (33) is slidably connected inside the piston cylinder (29) to inject colored water into the valve through the output end of the electric push rod (9). The piston (33) can recover the water in the valve when it resets. A transmission mechanism connected to the output end of the electric push rod (9) is installed on the fixed frame (8) to drive the conveyor belt (4) to rotate and transport water to the valve. When the output end of the electric push rod (9) moves down, the conveyor belt (4) remains stationary. When the electric push rod (9) moves up, the conveyor belt (4) moves to transport water to the valve at equal distances. It also includes the removal of residual water inside the valve. The cleaning mechanism for water cleaning includes a support plate (17) fixed on a fixed frame (8), a collection cylinder (18) fixed at the bottom of the support plate (17), a hollow screw (26) threaded onto the support plate (17), a hollow block (25) fixed at the bottom of the hollow screw (26), a balloon (27) communicating with the outer wall of the hollow block (25) sealed and wrapped, a plurality of sponge balls fixed on the outer wall of the balloon (27), and a hollow rod (16) fixed at the upper end of the hollow screw (26). A rotary joint (14) is installed on the hollow rod (16). A bent rod (13) is fixed at the upper end of the rotary joint (14). An installation rod (11) is fixed at the other end of the bent rod (13). The installation rod (11) is fixedly connected to the output end of the electric push rod (9). An extrusion plate (12) is fixedly connected on the installation rod (11). An airbag (15) opposite to the extrusion plate (12) is fixedly connected on the support plate (17). The airbag (15) is connected to the rotary joint (14) through a delivery pipe (38).

2. The sealing performance testing device for valve manufacturing according to claim 1, characterized in that, The limiting detection mechanism includes multiple limiting rings (5) fixed on the conveyor belt (4) and distributed at equal intervals. A limiting post (6) is fixed on the conveyor belt (4) and coaxially arranged with the limiting rings (5). Absorbent paper (7) is glued to the upper end of the limiting post (6).

3. The sealing performance testing device for valve manufacturing according to claim 1, characterized in that, A spring (34) is fixed to the bottom of the piston (33), and the lower end of the spring (34) is fixedly connected to the piston cylinder (29). A water injection pipe (32) and a water suction pipe (31) are fixed to the bottom of the piston cylinder (29). The water injection pipe (32) and the water suction pipe (31) pass through the hemispherical sealing block (30) and are fixedly connected to it. A connecting rod (28) is fixed to the upper end of the piston (33), and the connecting rod (28) is fixedly connected to the output end of the electric push rod (9).

4. The sealing performance testing device for valve manufacturing according to claim 3, characterized in that, The length of the water injection pipe (32) is less than the length of the water suction pipe (31), and a pressure relief valve (36) is installed on the water injection pipe (32). A one-way valve (35) is installed on the water suction pipe (31). The one-way valve (35) only allows clean water to enter the piston cylinder (29) through the water suction pipe (31).

5. A sealing performance testing device for valve manufacturing according to claim 1, characterized in that, The transmission mechanism includes a connecting rod (10) fixed to the output end of the electric push rod (9), a rack plate (19) fixed to the other end of the connecting rod (10), a short rod (21) rotatably connected to the fixed frame (8), a transmission gear (20) fixedly connected to the short rod (21), the transmission gear (20) meshing with the rack plate (19), a short shaft (22) coaxially fixedly connected to the transmission roller (3), a one-way bearing (23) fixedly fixed to the short shaft (22), a driven gear (24) fixedly fixed to the one-way bearing (23), and the driven gear (24) meshing with the transmission gear (20).

6. A sealing performance testing device for valve manufacturing according to claim 5, characterized in that, The fixing frame (8) is arranged in an inverted U-shape, and a through groove is provided on the fixing frame (8), and the connecting rod (10) is arranged through the through groove.

7. A sealing performance testing device for valve manufacturing according to claim 1, characterized in that, The collecting cylinder (18) includes an outer ring and an inner ring, the bottoms of which are sealed by a support ring, and the height of the outer ring is greater than the height of the inner ring.

Images