Valve airtightness test equipment

Abstract

The invention belongs to the technical field of airtightness detection, and particularly relates to valve airtightness testing equipment which comprises a testing box. Support frames are fixedly connected to the outer walls of the two sides of the test box; the ends of the two supporting frames are fixedly connected with a fixing plate. The two sides of the air box are connected with one ends of the valves in a sealed mode, the other ends of the valves are placed on the bearing frame in a sealed mode, the bearing frame is driven to slide downwards along with the output end of the hydraulic cylinder, the effect of synchronously testing the water immersion air tightness of the multiple valves is achieved, and the clamping plate extends forwards along with the output end of the electric cylinder and can be matched with the air box to clamp and seal the valves; a rubber pad and a rubber ring are attached to the two ends of the valve, the sealing effect of valve connection can be improved, a first elastic piece pulls a pressing plate to press the end of the valve, and two supports and a bearing frame of a clamping block are matched to adaptively clamp valves of different models; and the stability of the valve soaking air tightness test is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of air tightness detection, and particularly relates to a valve air tightness test equipment. BACKGROUND

[0002] A valve is a pipeline accessory used for opening and closing a pipeline and controlling a flow direction, and has functions of cutting off, guiding flow, adjusting and distributing, etc. The produced valve needs to be subjected to air tightness detection before being put into use.

[0003] A patent application with the publication number CN115420432A discloses a valve air tightness test tool and a detection method. One side of the air tightness detector is fixedly provided with a base, and the top of the base is fixedly connected with an inverted U-shaped support. The application drives the clamping arm, the gas conveying pipe and the gas nozzle to slide up and down through the electric telescopic rod, so that the gas nozzle can blow air onto the valve body placed on the placement table, and the motor in the rectangular frame drives the valve body to rotate at a constant speed, thereby achieving the function of uniformly blowing and drying the valve body.

[0004] The valve air tightness detection equipment disclosed above mainly blows air onto the valve rotating at a constant speed, thereby achieving the function of uniformly blowing and drying the valve. When the valve air tightness is tested, the valve is usually subjected to air tightness detection by being closed and filled with air, and the valve is visually inspected for air bubbles after being immersed in water. However, the current test equipment usually tests a single valve. When a large number of valves are subjected to air tightness test, it is difficult to quickly and tightly connect and test multiple valves, thereby affecting the efficiency of the valve air tightness test.

[0005] Therefore, the application provides a valve air tightness test equipment. SUMMARY

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background art.

[0007] The technical scheme adopted by the application to solve the technical problems is that the valve air tightness test equipment comprises a test box, both sides of the test box are fixedly provided with support frames, the end portions of the two support frames are fixedly provided with fixed plates, the middle bottom end of each fixed plate is fixedly provided with a hydraulic cylinder, the output end of each hydraulic cylinder is fixedly provided with a gas tank, both sides of the gas tank are provided with air grooves, the bottom end of the gas tank is fixedly provided with a supporting frame, the supporting frame is slidably connected to the inner wall of the test box, and the outer wall of the gas tank is provided with an air charging assembly for air charging test of the valve connected to the gas tank.

[0008] Preferably, the two side ends of the supporting frame are fixedly connected with sliding blocks, and the sliding blocks are slidingly connected to the inner wall of the test box; an electric cylinder is fixedly connected inside the two sliding blocks; the output end of the electric cylinder is fixedly connected with a clamping plate; a circular groove is formed in the outer wall of the two clamping plates, and the circular groove is arranged in correspondence with the ventilation groove.

[0009] Preferably, a rubber pad is fixedly connected to the inner wall of the two circular grooves; and a rubber ring is fixedly connected to the inner wall of the two ventilation grooves.

[0010] Preferably, the end of the air tank is fixedly connected with a first elastic member; the end of the first elastic member is fixedly connected with a pressing plate, and the pressing plate is slidingly connected to the outer wall of the output end of the hydraulic cylinder.

[0011] Preferably, a plurality of clamping blocks are fixedly connected to the bottom end of the pressing plate on both sides; two supporting rods are arranged at the bottom end of the plurality of clamping blocks, and the two supporting rods form a V shape.

[0012] Preferably, a limiting block is slidingly connected to the end of the supporting frame and close to the two sides of the air tank; a second elastic member is fixedly connected between the limiting block and the supporting frame.

[0013] Preferably, a gas cylinder is fixedly connected to the bottom end of the fixed plate and above the sliding block; an extrusion rod is slidingly connected inside the gas cylinder and is fixedly connected to the end of the sliding block; a blowing pipe is in communication between the gas cylinder and the clamping plate; a plurality of air holes are formed in the bottom of the two clamping plates and are in communication with the blowing pipe.

[0014] Preferably, the air charging assembly comprises a gas pump and a gas guide pipe; the gas pump is fixedly connected to the outside of the test box; and the gas guide pipe is connected between the output end of the gas pump and the air tank.

[0015] Preferably, a U-shaped groove is formed in the inner wall of the front end of the test box; and a tempered glass is fixedly connected to the inner wall of the U-shaped groove.

[0016] Preferably, a large circular hole is formed in the middle bottom end of the clamping plate; the plurality of air holes in the bottom of the clamping plate are arranged in a ring shape and are inclinedly arranged to gather in the middle part.

[0017] The beneficial effects of the present application are as follows: 1. A valve air tightness test equipment, one end of the valve is sealingly connected to the gas tank on both sides, the other end of the valve is blocked and placed on the support frame, as the hydraulic cylinder output end drives the support frame to slide down, it plays a role in synchronously testing the water tightness of multiple valves, the clamping plate can cooperate with the gas tank to clamp and block the valve, playing a role in quickly connecting and sealing the valve, the rubber pad and rubber ring are attached to both ends of the valve, which can improve the sealing effect of the valve connection, the pressing plate is pressed on the end of the valve by the elastic member, and the two supports of the clamping block and the support frame adapt to the clamping of different types of valves, improving the stability of the water tightness test of the valve.

[0018] 2. A valve air tightness test equipment, the limiting block is adaptively clamped into the groove at the bottom end of the valve, improving the stability of the valve connection and sealing, the sliding block drives the extrusion rod to extrude the gas in the air cylinder, the gas in the air cylinder is sent to multiple gas holes by the blowing pipe, the extruded gas is blown to the multiple surfaces of the valve through the multiple gas holes arranged in a ring shape and inclined in a row, playing a role in draining water and drying the valve, the gas generated by the operation of the air pump is sent to the gas tank through the air guide pipe, playing a role in testing the air tightness of the valve, the tempered glass is fixed in the U-shaped groove at the front end of the test box, facilitating visual observation of the generation of bubbles. BRIEF DESCRIPTION OF DRAWINGS

[0019] The application will be further described below with reference to the drawings.

[0020] Figure 1 is a perspective view of the application; Figure 2 is a structural schematic view of the gas tank in the application; Figure 3 is a structural schematic view of the air cylinder in the application; Figure 4 is a structural schematic view of the clamping block in the application; Figure 5 is a structural schematic view of the clamping plate in the application.

[0021] In the drawings: 1, test box; 11, support frame; 12, fixed plate; 13, hydraulic cylinder; 14, gas tank; 15, support frame; 2, sliding block; 21, electric cylinder; 22, clamping plate; 3, rubber pad; 31, rubber ring; 4, elastic member; 41, pressing plate; 5, clamping block; 6, limiting block; 7, air cylinder; 71, extrusion rod; 72, blowing pipe; 8, air pump; 81, air guide pipe; 9, tempered glass. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, purposes and effects of the application easy to understand, the application will be further described below with reference to the specific embodiments.

[0023] As shown in Figures 1 to 4 The valve air tightness test equipment provided by the embodiment of the application comprises a test box 1; support frames 11 are fixedly connected to the two side outer walls of the test box 1; end portions of the two support frames 11 are fixedly connected with fixing plates 12; a hydraulic cylinder 13 is fixedly connected to the middle bottom end of the fixing plate 12; an air tank 14 is fixedly connected to the output end of the hydraulic cylinder 13, and air vents are formed in the two sides of the air tank 14; a supporting frame 15 is fixedly connected to the bottom end of the air tank 14, and the supporting frame 15 is slidingly connected to the inner wall of the test box 1; an inflation assembly is arranged on the outer wall of the air tank 14, and the inflation assembly is used for inflating test of the valve connected to the air tank 14; when batch air tightness test of the valve is performed, first, one third of water is injected into the test box 1, one end of two valves is sealed, then the two valves are symmetrically placed on the supporting frame 15, the other end of the two valves is inserted into the air vents on the two sides of the air tank 14, the two support frames 11 support the hydraulic cylinder 13 on the test box 1 in cooperation with the fixing plates 12, the output end of the hydraulic cylinder 13 is lowered to drive the air tank 14 and the two valves placed on the supporting frame 15 to be immersed in water, at this time, the inflation assembly is used to inflate the air tank 14, the gas is sent into the two valves from the air vents on the two sides of the air tank 14, whether bubbles are generated on the water surface is observed after the valve is pressure maintained, if no bubbles are generated, the valve is regarded as a qualified product, if bubbles are generated, the valve is taken out after the water immersion test is completed, and the valve is detected again to determine whether the valve is qualified, and the valve is collected after being drained, thereby achieving the function of synchronous air tightness test of multiple valves and improving the efficiency of air tightness test of the valve.

[0024] As shown in Figures 1 to 5 The two side end portions of the supporting frame 15 are fixedly connected with sliding blocks 2, and the sliding blocks 2 are slidingly connected to the inner wall of the test box 1; electric cylinders 21 are fixedly connected to the interiors of the two sliding blocks 2; clamping plates 22 are fixedly connected to the output ends of the electric cylinders 21; circular grooves are formed in the outer walls of the two clamping plates 22, and the circular grooves are arranged in correspondence with the air vents; when the air tightness of the valve is tested in a connected and sealed manner, the two valves are placed on the supporting frame 15, and the opposite ends of the two valves are inserted into the air vents of the air tank 14 in a connected manner, then the output ends of the two electric cylinders 21 drive the clamping plates 22 to slide on the supporting frame 15 to be close to the other ends of the two valves, the circular grooves on the clamping plates 22 are in close contact with the other ends of the two valves, thereby achieving the function of quick connection and sealing of the two valves, and the clamping plates 22 clamp the valve in cooperation with the air tank 14, with the output end of the hydraulic cylinder 13 being lowered, the two side sliding blocks 2 and the supporting frame 15 slide downward along the inner wall of the test box 1 to immerse the valve in water, thereby improving the stability of the valve placed on the supporting frame 15 and immersed in water.

[0025] The inner wall of the two circular grooves is fixedly connected with rubber pads 3; the inner wall of the two air grooves is fixedly connected with rubber rings 31; when the valve is connected for sealing air tightness test, one end of the valve is inserted into the circular groove, and the rubber pad 3 is squeezed to shrink under stress, so that one end of the valve is sealed, the other end of the valve is inserted into the air groove of the air tank 14, and the rubber ring 31 is squeezed to shrink by the other end of the valve, so that the other end of the valve is communicated with the inflation assembly, thereby improving the sealing of the valve connection.

[0026] As shown in Figure 1 , Figure 2 and Figure 4 , the end of the air tank 14 is fixedly connected with a first elastic member 4; the end of the first elastic member 4 is fixedly connected with a pressing plate 41, and the pressing plate 41 is slidingly connected to the outer wall of the output end of the hydraulic cylinder 13; when the valve connection is placed on the support frame 15, since the valve needs to be lowered to immerse in water for air tightness test, displacement may occur during movement of the valve, which affects the sealing effect of the connection, the pressing plate 41 is pressed on the top end of the plurality of valves, and the first elastic member 4 pulls the pressing plate 41, the pressing plate 41 cooperates with the support frame 15 to clamp the plurality of valves up and down, thereby improving the stability of the water immersion test of the plurality of valves.

[0027] The bottom end of the pressing plate 41 is fixedly connected with a plurality of clamping blocks 5 on both sides; the bottom end of the plurality of clamping blocks 5 is provided with two supporting rods, and the two supporting rods form a V shape; when the valve connection is placed on the support frame 15, the pressing plate 41 cooperates with the plurality of clamping blocks 5 to press on the end of the valve, the two supporting rods are inverted V-shaped and pressed on the valve, and the two supporting rods at the bottom end of the plurality of clamping blocks 5 can adaptively press on the end of the valve of different shapes, thereby adapting to the pressing of the valve.

[0028] As shown in Figures 1 to 4 , the end of the support frame 15 and close to the two sides of the air tank 14 are slidingly connected with limiting blocks 6; the limiting blocks 6 and the support frame 15 are fixedly connected with a second elastic member; when the valve is placed on the support frame 15, a groove corresponding to the limiting block 6 is provided at the bottom end of the valve, the limiting block 6 is replaced according to the shape of the groove at the bottom end of the valve, and the valve is inserted into the limiting block 6, and the second elastic member is shrunk under stress when the end of the valve is pressed, thereby improving the stability of the valve placed and clamped on the support frame 15.

[0029] As shown in Figures 1 to 3As shown, the bottom end of the fixed plate 12 is fixed with the air cylinder 7 above the sliding block 2; the inside of the air cylinder 7 is slidably connected with the extrusion rod 71, and the extrusion rod 71 is fixed to the end of the sliding block 2; the air cylinder 7 is communicated with the air blowing pipe 72 between the clamping plate 22; the bottom of the two clamping plates 22 is provided with a plurality of air holes, and the plurality of air holes are communicated with the air blowing pipe 72; when the valve is tested for water immersion air tightness, the output end of the hydraulic cylinder 13 drives the support frame 15 to slide down, the extrusion rod 71 is pulled by the sliding block 2 to slide in the inner wall of the extrusion rod 71, after the valve air tightness test, the output end of the hydraulic cylinder 13 is retracted to drive the two sliding blocks 2 to slide up, the sliding block 2 drives the extrusion rod 71 to slide up to extrude the internal cavity of the air cylinder 7, the gas in the air cylinder 7 is extruded and sent to the plurality of air holes of the clamping plate 22 by the air blowing pipe 72, the gas is blown to the valve which is draining water after being immersed in water, and the valve is blown and dried.

[0030] As shown in Figure 1 , Figure 2 and Figure 4 , the air charging assembly includes an air pump 8 and an air guide pipe 81; the air pump 8 is fixed to the outside of the test box 1; the air guide pipe 81 is connected between the output end of the air pump 8 and the air tank 14; when the valve is tested for air tightness, a plurality of valves are placed on the support frame 15 and connected and sealed, then the plurality of valves are immersed in water, the air pump 8 works to generate gas, and the gas is sent to the inside of the air tank 14 by the air guide pipe 81, the gas in the air tank 14 enters the two valves respectively for air tightness detection, and the two valves are tested for air charging.

[0031] As shown in Figure 1 , the front end inner wall of the test box 1 is provided with a U-shaped groove; the inner wall of the U-shaped groove is fixed with a tempered glass 9; when the valve is tested for air tightness after being immersed in water, the tempered glass 9 is fixed in the U-shaped groove at the front end of the test box 1, and the transparent property of the tempered glass 9 is used for visual observation of whether there is air bubble, thereby improving the effect of the valve immersed in water for air tightness test.

[0032] As shown in Figures 1 to 3 , Figure 5 , a large circular hole is formed in the middle bottom end of the clamping plate 22; the plurality of air holes in the bottom of the clamping plate 22 are arranged in a ring shape, and the plurality of air holes are inclined and arranged to gather in the middle; after the valve is tested for water immersion air tightness, the valve is lifted to drain water, the gas in the air cylinder 7 is extruded and discharged to the plurality of air holes at the bottom end of the clamping plate 22, the ring-shaped inclined and arranged plurality of air holes can blow the air to the plurality of surfaces of the valve, and the large circular hole at the bottom end of the clamping plate 22 blows the air to the end of the valve synchronously, thereby achieving the effect of draining water and blowing air to dry the valve.

[0033] Working process: when batch testing the air tightness of the valves, first, inject one third of the water into the test box 1, seal one end of the two valves, then place the two valves symmetrically on the support frame 15, and insert the other end of the two valves into the air tank 14 air groove on both sides, the two support frames 11 cooperate with the fixed plate 12 to support the hydraulic cylinder 13 on the test box 1, the output end of the hydraulic cylinder 13 is lowered to drive the air tank 14 and the two valves placed on the support frame 15 to immerse in water, at this time the air pump 8 works to produce gas, which is sent to the inside of the air tank 14 by the air pipe 81, the gas in the air tank 14 enters the two valves respectively for air tightness test, after the valve pressure is maintained, observe whether there is bubble on the water surface, if there is no bubble, it is considered as qualified product, if there is bubble, after the valve is taken out for secondary detection after the end of the water test, it is judged again, the valve is drained and collected after air tightness test, which plays a role in synchronous air tightness test of multiple valves and improves the efficiency of valve air tightness test; when testing the air tightness of the connected valve, place the two valves on the support frame 15, and insert the opposite end of the two valves into the air tank 14 air groove for connection, then the output end of the two electric cylinders 21 drives the clamping plate 22 to slide on the support frame 15 close to the other end of the two valves, the round groove on the clamping plate 22 is in close contact with the other end of the valve, which plays a role in quick connection and sealing of the two valves, at the same time, the clamping plate 22 cooperates with the air tank 14 to clamp the valve, with the output end of the hydraulic cylinder 13 lowered, the two sides of the sliding block 2 and the support frame 15 are lowered to test the inner wall of the test box 1, which improves the stability of the valve placed on the support frame 15 immersed in water; when testing the air tightness of the connected valve, insert one end of the valve into the round groove and squeeze the rubber pad 3 to shrink under stress, seal one end of the valve, insert the other end of the valve into the air tank 14 air groove, and the rubber ring 31 is squeezed and shrunk by the other end of the valve to connect the other end of the valve with the inflation assembly, which improves the sealing of the valve connection; When the valve connection is placed on the support frame 15, the valve needs to be lowered to immerse in water for testing air tightness, and displacement may occur during valve movement, which affects the connection and sealing effect, the pressing plate 41 is pressed on the top of the multiple valves, and the pressing plate 41 is pulled by the first elastic member 4, the pressing plate 41 cooperates with the support frame 15 to clamp the multiple valves up and down, which improves the stability of the multiple valves in water test; when the valve connection is placed on the support frame 15, the pressing plate 41 cooperates with the multiple clamping blocks 5 to press on the end of the valve, the two supporting rods are in inverted V shape and press on the valve, the two supporting rods at the bottom of the multiple clamping blocks 5 can adaptively press on the end of the valve with different shapes, which plays a role in adaptability of pressing on the valve; When the valve is placed on the support frame 15, the bottom end of the valve is provided with a groove corresponding to the limiting block 6, and the limiting block 6 is replaced according to the shape of the groove at the bottom end of the valve, the valve is inserted on the limiting block 6, and the second elastic member is contracted under stress as the end of the valve is pressed, thereby improving the stability of the valve placed and clamped on the support frame 15. When the valve is immersed in water for air tightness test, the output end of the hydraulic cylinder 13 drives the support frame 15 to slide downward, the extrusion rod 71 is pulled by the sliding block 2 to slide in the inner wall of the extrusion rod 71, after the air tightness test of the valve, the output end of the hydraulic cylinder 13 is retracted to drive the two sliding blocks 2 to slide upward, the sliding block 2 drives the extrusion rod 71 to slide upward to extrude the internal cavity of the air cylinder 7, the gas in the air cylinder 7 is extruded and sent to the multiple air holes of the clamping plate 22 by the blowing pipe 72, the gas is blown to the valve which is draining water after being immersed in water, and the valve is blown and dried by air; after the valve is immersed in water for air tightness test, the valve is lifted to drain water, the gas in the air cylinder 7 is extruded and sent to the multiple air holes at the bottom end of the clamping plate 22, and the air is blown to the valve by the multiple air holes arranged in a ring shape and inclined, and the air is blown to the end of the valve by the large circular hole at the bottom end of the clamping plate 22, thereby achieving the effect of draining water and blowing air to dry the valve. When the valve is immersed in water for air tightness test, the valve is immersed in water for air tightness test, the steel glass 9 is fixed in the U-shaped groove at the front end of the test box 1, and the transparent property of the steel glass 9 is used to visually observe whether bubbles are generated, thereby improving the effect of the valve immersed in water for air tightness test.

[0034] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A valve air tightness testing apparatus, characterized by: Including test box (1), both sides of the test box (1) are fixed with support frame (11), the end of two support frames (11) is fixed with fixed plate (12), the middle bottom of fixed plate (12) is fixed with hydraulic cylinder (13), the output end of hydraulic cylinder (13) is fixed with air tank (14), and both sides of air tank (14) are provided with air groove, the bottom of air tank (14) is fixed with support frame (15), and support frame (15) is slidably connected to the inner wall of test box (1), the outer wall of air tank (14) is provided with inflation assembly, and the inflation assembly is used for inflating test of valve connected to air tank (14). Both sides of the end of support frame (15) are fixed with sliding block (2), and sliding block (2) is slidably connected to the inner wall of test box (1), the inside of two sliding blocks (2) is fixed with electric cylinder (21), the output end of electric cylinder (21) is fixed with clamping plate (22), the outer wall of two clamping plates (22) is provided with circular groove, and the circular groove is correspondingly arranged with air groove.

2. The valve air tightness testing apparatus of claim 1, wherein: The inner wall of two circular grooves is fixed with rubber pad (3), and the inner wall of two air grooves is fixed with rubber ring (31).

3. The valve air tightness testing apparatus of claim 1, wherein: The end of air tank (14) is fixed with a first elastic member (4), the end of first elastic member (4) is fixed with pressing plate (41), and pressing plate (41) is slidably connected to the outer wall of the output end of hydraulic cylinder (13).

4. The valve air tightness testing apparatus of claim 3, wherein: The bottom of pressing plate (41) is fixed with a plurality of clamping blocks (5), and the bottom of a plurality of clamping blocks (5) is provided with two supporting rods, and the two supporting rods form a V shape.

5. The valve air tightness testing apparatus of claim 1, wherein: The end of support frame (15) and the two sides close to air tank (14) are slidably connected with limiting block (6), and the limiting block (6) and the support frame (15) are fixed with a second elastic member.

6. The valve air tightness testing apparatus of claim 1, wherein: The bottom of fixed plate (12) and above sliding block (2) is fixed with air cylinder (7), the inside of air cylinder (7) is slidably connected with extrusion rod (71), and extrusion rod (71) is fixed to the end of sliding block (2), air cylinder (7) and clamping plate (22) are communicated with blowing pipe (72), and the bottom of two clamping plates (22) is provided with a plurality of air holes, and the plurality of air holes are communicated with blowing pipe (72).

7. The valve air tightness testing apparatus of claim 1, wherein: The inflation assembly comprises air pump (8) and air pipe (81), the air pump (8) is fixed outside the test box (1), and the air pipe (81) is connected between the output end of air pump (8) and air tank (14).

8. The valve air tightness testing apparatus of claim 1, wherein: The front end of the inner wall of the test box (1) is provided with a U-shaped groove, and the inner wall of the U-shaped groove is fixed with a tempered glass (9).

9. The valve air tightness testing apparatus of claim 6, wherein: The middle bottom of the clamping plate (22) is provided with a large circular hole, and the plurality of air holes in the bottom of the clamping plate (22) are arranged in a ring shape, and the plurality of air holes are inclined to the middle part.

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