One-way valve weld air tightness test device

Abstract

The present invention discloses a device for testing the air tightness of a one-way valve weld, comprising a frame, a support seat, a sealing sleeve, a sliding seat, a cylinder, a compressed air supply unit and an air pressure monitoring unit; the support seat is fixed on the frame, and a slot with an upper end opening is provided on the support seat, an annular convex edge on the outer wall of the one-way valve is supported on a first annular step, an air inlet joint is provided on the side wall of the slot, and the air inlet joint is connected to the air outlet end of the compressed air supply unit; the sliding seat is vertically slidably connected to the frame, and the cylinder is fixed at the upper end of the frame and is used to drive the sliding seat to slide vertically; the upper end of the sealing sleeve is fixed and sealed to the lower end of the sliding seat, the lower end of the sealing sleeve is connected to a sealing structure, the lower end of the sealing sleeve is connected to a coil assembly, an exhaust joint is provided on the side wall of the sealing sleeve, and the exhaust joint is connected to the air inlet end of the air pressure monitoring unit; the present invention can be applied to one-way valve assembly equipment and detect the air tightness of the weld between the moving iron and the shell in the one-way valve.

Description

Technical Field

[0001] The invention relates to the technical field of air tightness testing equipment, and in particular to an air tightness testing device for a one-way valve weld. Background Art

[0002] At present, after the one-way valve is assembled by the one-way valve assembly equipment, since the one-way valve assembly equipment currently on the market does not have a detection mechanism for detecting the airtightness of the weld between the moving iron and the shell in the one-way valve, the one-way valve with unqualified airtightness between the moving iron and the shell will be mixed into the qualified products. That is, the one-way valve assembled by the one-way valve assembly equipment will have unqualified airtightness between the moving iron and the shell, and then when the one-way valve is applied to the solenoid valve, it will affect the yield of the solenoid valve. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the present invention provides a one-way valve weld air tightness testing device, which can be applied to one-way valve assembly equipment and detect the air tightness of the weld between the moving iron and the shell in the one-way valve.

[0004] The one-way valve weld air tightness testing device of the present invention comprises a frame, a support seat, a sealing sleeve, a sliding seat, a cylinder, a compressed air supply unit and an air pressure monitoring unit; the support seat is fixed on the frame, and a slot with an upper opening is provided on the support seat, and the slot is used for inserting the lower end part of the one-way valve, and a first annular step is provided at the opening at the upper end of the slot, and the annular convex edge located on the outer wall of the one-way valve is supported on the first annular step, and the air inlet and air outlet of the one-way valve are both located in the slot, and an air inlet joint is provided on the side wall of the slot, and the air inlet joint is connected to the air outlet end of the compressed air supply unit; the sliding seat is vertically slidably connected to the frame, and the cylinder is fixed on the upper end of the frame and is used to drive the sliding seat to slide vertically, and the sliding seat and the cylinder The piston rod is fixed; the upper end of the sealing sleeve is fixed and sealed to the lower end of the sliding seat, and the sealing sleeve is used for inserting the upper end part of the one-way valve. After the upper end part of the one-way valve is inserted into the sealing sleeve, the weld between the fixed iron in the one-way valve and the shell is located in the sealing sleeve, and the lower end of the sealing sleeve is connected with a sealing structure. When the cylinder drives the sliding seat to slide downward, the sealing structure is used to press the annular convex edge onto the first annular step and the sealing structure is used to seal the gap between the annular convex edge and the sealing sleeve. The lower end of the sealing sleeve is connected with a coil assembly. When the coil assembly is energized, the coil assembly is used to drive the moving iron in the one-way valve to move to open the one-way valve. An exhaust joint is provided on the side wall of the sealing sleeve, and the exhaust joint is connected to the air inlet end of the air pressure monitoring unit.

[0005] The present invention can be applied to one-way valve assembly equipment and can detect the air tightness of the weld between the moving iron and the shell in the one-way valve, so that the one-way valve assembly equipment can eliminate the one-way valve with unqualified air tightness, and then when the one-way valve is applied to the solenoid valve, the yield of the solenoid valve can be ensured.

[0006] The one-way valve weld air tightness testing device of the present invention, wherein the sealing structure includes a pressing sleeve and a ring-shaped sealing gasket, the sealing gasket is embedded in the pressing sleeve, the pressing sleeve is arranged on the outside of the lower end of the sealing sleeve and is threadedly connected to the sealing sleeve, the outer edge of the sealing gasket is pressed against the lower end of the sealing sleeve by the pressing sleeve, and the lower end of the sealing gasket protrudes from the pressing sleeve from top to bottom; after adopting this sealing structure, after the cylinder drives the sliding seat to slide downward, the sealing gasket can press the annular flange against the first annular step and the sealing gasket can seal the gap between the annular flange and the sealing sleeve, and in addition, under the action of the pressing sleeve, the sealing gasket can be reliably fixed to the lower end of the sealing sleeve.

[0007] The one-way valve weld air tightness testing device of the present invention is characterized in that an annular groove is provided on the interior of the sealing gasket, and the coil assembly is embedded in the annular groove, and the upper and lower ends of the coil assembly are respectively abutted against the lower end of the sealing sleeve and the inner bottom of the annular groove; by adopting this structure, the coil assembly can be reliably and conveniently connected to the lower end of the sealing sleeve.

[0008] When the cam is in the closed position, the cam is in the closed position, and the cam is in the closed position, so that the cam is in the closed position and the cam is in the closed position.

[0009] The one-way valve weld air tightness testing device of the present invention, wherein the anti-detachment structure includes an annular boss arranged on the outer wall of the push rod, and a second annular step is arranged on the inner wall of the sealing sleeve, and the annular boss is supported on the second annular step; by adopting this structure, under the cooperative action of the annular boss and the second annular step, the push rod can be effectively prevented from detaching from the sealing sleeve from top to bottom.

[0010] In the one-way valve weld air tightness testing device of the present invention, a sealing ring is embedded between the upper end of the sealing sleeve and the lower end of the sliding seat; by adopting this structure, under the action of the sealing ring, a reliable seal can be achieved between the upper end of the sealing sleeve and the lower end of the sliding seat.

[0011] The one-way valve weld air tightness testing device of the present invention, wherein the compressed air supply unit includes an air inlet on-off valve fixed on a frame, the air inlet end of the air inlet on-off valve is used to be connected to a compressed air source, and the air inlet joint is connected to the air outlet end of the air inlet on-off valve through a pipeline; by adopting this compressed air supply unit, when the air inlet on-off valve is opened, the compressed air from the compressed air source can enter the slot located on the support seat through the air inlet on-off valve, thereby realizing the air supply to the one-way valve.

[0012] The one-way valve weld air tightness testing device of the present invention, wherein the air pressure monitoring unit includes a three-way connecting block, an air pressure sensor and an exhaust on-off valve, the three-way connecting block is fixed on the frame, the exhaust joint is connected to the first end of the three-way connecting block through a pipeline, the monitoring end of the air pressure sensor is connected to the second end of the three-way connecting block, and the exhaust on-off valve is connected to the third end of the three-way connecting block; after adopting this air pressure monitoring unit, when there is a leak in the weld between the fixed iron and the shell in the one-way valve, the compressed air leaked from between the fixed iron and the shell can enter the air pressure sensor through the three-way connecting block. At this time, the air pressure sensor can detect the existence of air pressure, thereby enabling the control unit connected to the air pressure sensor to alarm, indicating that there is a leak in the weld between the fixed iron and the shell in the one-way valve. After the test is completed, the exhaust on-off valve can be opened. At this time, the compressed air entering the three-way connecting block can be discharged through the exhaust on-off valve.

[0013] In the one-way valve weld air tightness testing device of the present invention, the sliding seat is vertically slidably connected to the frame via a slide rail assembly; by adopting this structure, the sliding seat can be reliably vertically slidably connected to the frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0016] Figure 2 for Figure 1 The schematic diagram of the structure after enlarging at A in the middle;

[0017] Figure 3 for Figure 2 The enlarged structural diagram of point C in the middle;

[0018] Figure 4 for Figure 1 The schematic diagram of the structure after enlarging at B in the middle;

[0019] Figure 5 for Figure 4Schematic diagram of the structure after enlarging at D in the middle. DETAILED DESCRIPTION

[0020] The following diagrams illustrate various embodiments of the present invention. For clarity, many practical details are included in the following description. However, it should be understood that these practical details are not intended to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not essential. Furthermore, to simplify the drawings, some commonly used structures and components are depicted in simplified schematic form.

[0021] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0022] like Figure 1-5As shown, the one-way valve weld air tightness testing device of the present invention includes a frame 1, a support seat 2, a sealing sleeve 3, a sliding seat 4, a cylinder 5, a compressed air supply unit and an air pressure monitoring unit; the support seat 2 is fixed on the frame 1, and a slot 21 with an upper end opening is provided on the support seat 2, and the slot 21 is used for the lower end part of the one-way valve 6 to be inserted, and a first annular step 22 is provided at the opening at the upper end of the slot 21, and an annular convex edge 61 located on the outer wall of the one-way valve 6 is supported on the first annular step 22, and the air inlet hole 62 and the air outlet hole 63 of the one-way valve 6 are both located in the slot 21, and an air inlet joint 23 is provided on the side wall of the slot 21, and the air inlet joint 23 is connected to the air outlet end of the compressed air supply unit; the sliding seat 4 is vertically slidably connected to the frame 1, and the cylinder 5 is fixed to the upper end of the frame 1 and is used to drive the sliding seat 4 to slide vertically, and the sliding seat 4 is fixed to the piston rod of the cylinder 5; the upper end of the sealing sleeve 3 is fixed and sealed to the lower end of the sliding seat 4, and the sealing sleeve 3 is used for inserting the upper end part of the one-way valve 6. After the upper end part of the one-way valve 6 is inserted into the sealing sleeve 3, the weld between the fixed iron 64 and the shell 65 in the one-way valve 6 is located in the sealing sleeve 3, and the lower end of the sealing sleeve 3 is connected with a sealing structure. When the cylinder 5 drives the sliding seat 4 to slide downward, the sealing structure is used to press the annular flange 61 onto the first annular step 22 and the sealing structure is used to seal the gap between the annular flange 61 and the sealing sleeve 3. The lower end of the sealing sleeve 3 is connected with a coil assembly 7. When the coil assembly 7 is energized, the coil assembly 7 is used to drive the moving iron 66 in the one-way valve 6 to move to open the one-way valve 6. An exhaust connector 31 is provided on the side wall of the sealing sleeve 3, and the exhaust connector 31 is connected to the air inlet end of the air pressure monitoring unit.

[0023] The sealing structure includes a pressing sleeve 81 and a ring-shaped sealing gasket 82. The sealing gasket 82 is embedded in the pressing sleeve 81. The pressing sleeve 81 is sleeved on the outside of the lower end of the sealing sleeve 3 and is threadedly connected to the sealing sleeve 3. The outer edge of the sealing gasket 82 is pressed against the lower end of the sealing sleeve 3 by the pressing sleeve 81, and the lower end of the sealing gasket 82 protrudes from the pressing sleeve 81 from top to bottom. After adopting this sealing structure, after the cylinder drives the sliding seat to slide downward, the sealing gasket can press the annular convex edge against the first annular step and the sealing gasket can seal the gap between the annular convex edge and the sealing sleeve. In addition, under the action of the pressing sleeve, the sealing gasket can be reliably fixed to the lower end of the sealing sleeve.

[0024] An annular groove 821 is provided inside the sealing gasket 82, and the coil assembly 7 is embedded in the annular groove 821. The upper end and lower end of the coil assembly 7 are respectively abutted against the lower end of the sealing sleeve 3 and the inner bottom of the annular groove 821; by adopting this structure, the coil assembly can be reliably and conveniently connected to the lower end of the sealing sleeve.

[0025] The interior of the sealing sleeve 3 is provided with a spring 91 and a push rod 92 in sequence from top to bottom. The two ends of the spring 91 are respectively against the lower end of the sliding seat 4 and the upper end of the push rod 92. When the upper end of the one-way valve 6 is inserted into the sealing sleeve 3, the lower end of the push rod 92 is used to pre-tighten against the fixed iron 64 located at the upper end of the one-way valve 6, and an anti-slip structure is provided between the push rod 92 and the sealing sleeve 3 to prevent the push rod 92 from escaping from the sealing sleeve 3; through the arrangement of the spring and the push rod, when the cylinder drives the sliding seat to move downward, the sliding seat can drive the sealing sleeve to move downward. During the downward movement of the sealing sleeve, the lower end of the push rod can be in advance against the fixed iron located at the upper end of the one-way valve, thereby realizing pre-tightening of the one-way valve, so that when the subsequent sealing structure presses the annular convex edge onto the first annular step, the sealing structure can reliably press the annular convex edge onto the first annular step, that is, the pressing effect of the one-way valve can be improved.

[0026] The anti-slip structure includes an annular boss 921 arranged on the outer wall of the push rod 92, and a second annular step 32 is arranged on the inner wall of the sealing sleeve 3, and the annular boss 921 is supported on the second annular step 32; by adopting this structure, under the cooperation of the annular boss and the second annular step, the push rod can be effectively prevented from detaching from the sealing sleeve from top to bottom.

[0027] A sealing ring 33 is embedded between the upper end of the sealing sleeve 3 and the lower end of the sliding seat 4. By adopting this structure, under the action of the sealing ring, a reliable seal can be achieved between the upper end of the sealing sleeve and the lower end of the sliding seat.

[0028] The compressed air supply unit includes an air intake on-off valve 10 fixed on the frame 1, the air intake end of the air intake on-off valve 10 is used to be connected to the compressed air source, and the air intake connector 23 is connected to the air outlet end of the air intake on-off valve 10 through a pipeline; by adopting this compressed air supply unit, when the air intake on-off valve is opened, the compressed air from the compressed air source can enter the slot located on the support seat through the air intake on-off valve, thereby realizing the air supply to the one-way valve.

[0029] The air pressure monitoring unit includes a three-way connecting block 201, an air pressure sensor 202 and an exhaust on-off valve 203. The three-way connecting block 201 is fixed on the frame 1, and the exhaust joint 31 is connected to the first end of the three-way connecting block 201 through a pipeline, the monitoring end of the air pressure sensor 202 is connected to the second end of the three-way connecting block 201, and the exhaust on-off valve 203 is connected to the third end of the three-way connecting block 201; after adopting this air pressure monitoring unit, when there is a leak in the weld between the fixed iron and the shell in the one-way valve, the compressed air leaked from between the fixed iron and the shell can enter the air pressure sensor through the three-way connecting block. At this time, the air pressure sensor can detect the existence of air pressure, thereby enabling the control unit connected to the air pressure sensor to alarm, indicating that there is a leak in the weld between the fixed iron and the shell in the one-way valve. After the test is completed, the exhaust on-off valve can be opened. At this time, the compressed air entering the three-way connecting block can be discharged through the exhaust on-off valve.

[0030] The sliding seat 4 is vertically slidably connected to the frame 1 through the slide rail assembly 41; by adopting this structure, the sliding seat can be reliably vertically slidably connected to the frame.

[0031] When using the present invention to test the air tightness of the weld between the fixed iron and the shell in the one-way valve, the lower end of the one-way valve is first inserted into the slot located on the support seat and the annular ridge located on the outer wall of the one-way valve is supported on the first annular step. Then the cylinder drives the sliding seat to move downward so that the sliding seat drives the sealing sleeve to move downward. After the sealing sleeve moves downward, the sealing gasket can press the annular ridge against the first annular step, and the gap between the lower end of the sealing sleeve and the upper end of the annular ridge can be sealed by the sealing gasket. Then the coil assembly is energized. At this time, the coil assembly can drive the moving iron in the one-way valve to move to open the one-way valve, and then the air intake on-off valve is opened. After the air intake on-off valve is opened, the compressed air from the compressed air source can enter the one-way valve through the slot located on the support seat. If there is a leakage in the weld between the fixed iron and the shell in the one-way valve , compressed air can leak from the weld between the fixed iron and the shell. At this time, the compressed air leaked from between the fixed iron and the shell can enter the air pressure sensor through the three-way connecting block, so that the air pressure sensor can detect the existence of air pressure, and then can make the control unit connected to the air pressure sensor alarm, which means that there is a leak in the weld between the fixed iron and the shell in the one-way valve, that is, the one-way valve test fails. If there is no leakage in the weld between the fixed iron and the shell in the one-way valve, the air pressure sensor cannot detect the existence of air pressure, which means that the one-way valve test is qualified; the above-mentioned air pressure sensor can continuously monitor the air pressure for a period of time (the period of time is 3-5 seconds) to ensure the accuracy of the test results; after the test is completed, the exhaust on-off valve can be opened. If there is air pressure in the three-way connecting block, the compressed air in the three-way connecting block can be discharged through the exhaust on-off valve.

[0032] The foregoing is merely an embodiment of the present invention and is not intended to limit the present invention. It will be apparent to those skilled in the art that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are intended to be included within the scope of the claims of the present invention.

Claims

1. A one-way valve weld air tightness testing device, characterized by: The invention comprises a frame (1), a support base (2), a sealing sleeve (3), a sliding base (4), a cylinder (5), a compressed air supply unit and an air pressure monitoring unit; the support base (2) is fixed on the frame (1); a slot (21) with an upper opening is provided on the support base (2); the slot (21) is used for inserting the lower end portion of the one-way valve (6); a first annular step (22) is provided at the opening at the upper end of the slot (21); an annular convex edge (61) located on the outer wall of the one-way valve (6) is supported on the first annular step (22); an air inlet (62) and an air outlet (63) of the one-way valve (6) are both located in the slot (21); and the side of the slot (21) is provided with a first annular step (22). An air inlet joint (23) is provided on the wall, and the air inlet joint (23) is connected to the air outlet end of the compressed air supply unit; the sliding seat (4) is vertically slidably connected to the frame (1), and the cylinder (5) is fixed to the upper end of the frame (1) and is used to drive the sliding seat (4) to slide vertically, and the sliding seat (4) is fixed to the piston rod of the cylinder (5); the upper end of the sealing sleeve (3) is fixed and sealed to the lower end of the sliding seat (4), and the sealing sleeve (3) is used for inserting the upper end portion of the one-way valve (6). After the upper end portion of the one-way valve (6) is inserted into the sealing sleeve (3), the weld between the fixed iron (64) and the shell (65) in the one-way valve (6) is located in the sealing sleeve (3). The lower end of the sealing sleeve (3) is connected to a sealing structure. When the cylinder (5) drives the sliding seat (4) to slide downward, the sealing structure is used to press the annular convex edge (61) against the first annular step (22) and the sealing structure is used to seal the gap between the annular convex edge (61) and the sealing sleeve (3). The lower end of the sealing sleeve (3) is connected to a coil assembly (7). When the coil assembly (7) is energized, the coil assembly (7) is used to drive the moving iron (66) in the one-way valve (6) to move so that the one-way valve (6) is opened. An exhaust connector (31) is provided on the side wall of the sealing sleeve (3). The exhaust connector (31) is connected to the air inlet end of the air pressure monitoring unit. The sealing structure The invention comprises a pressing sleeve (81) and a ring-shaped sealing gasket (82), wherein the sealing gasket (82) is embedded in the pressing sleeve (81), the pressing sleeve (81) is sleeved on the outside of the lower end of the sealing sleeve (3) and is threadedly connected to the sealing sleeve (3), the outer edge of the sealing gasket (82) is pressed against the lower end of the sealing sleeve (3) by the pressing sleeve (81), and the lower end of the sealing gasket (82) protrudes from the outside of the pressing sleeve (81) from top to bottom; an annular groove (821) is provided on the inside of the sealing gasket (82), and the coil assembly (7) is embedded in the annular groove (821), and the upper end and lower end of the coil assembly (7) are respectively abutted against the lower end of the sealing sleeve (3) and the inner bottom of the annular groove (821);The interior of the sealing sleeve (3) is provided with a spring (91) and a push rod (92) in sequence from top to bottom. The two ends of the spring (91) are respectively against the lower end of the sliding seat (4) and the upper end of the push rod (92). When the upper end of the one-way valve (6) is inserted into the sealing sleeve (3), the lower end of the push rod (92) is used to pre-tighten with the fixed iron (64) located at the upper end of the one-way valve (6). An anti-slip structure for preventing the push rod (92) from escaping from the sealing sleeve (3) is provided between the push rod (92) and the sealing sleeve (3); the anti-slip structure includes an annular boss (921) provided on the outer wall of the push rod (92), and a second annular step (32) is provided on the inner wall of the sealing sleeve (3). The annular boss (921) is supported on the second annular step (32).

2. The one-way valve weld air tightness testing device according to claim 1, characterized in that: A sealing ring (33) is embedded between the upper end of the sealing sleeve (3) and the lower end of the sliding seat (4).

3. The one-way valve weld air tightness testing device according to claim 1, characterized in that: The compressed air supply unit comprises an air inlet on-off valve (10) fixed on the frame (1), an air inlet end of the air inlet on-off valve (10) is used to be connected to a compressed air source, and the air inlet connector (23) is connected to an air outlet end of the air inlet on-off valve (10) through a pipeline.

4. The one-way valve weld air tightness testing device according to claim 1, characterized in that: The air pressure monitoring unit comprises a three-way connecting block (201), an air pressure sensor (202) and an exhaust on-off valve (203); the three-way connecting block (201) is fixed on the frame (1); the exhaust joint (31) is connected to a first end of the three-way connecting block (201) through a pipeline; the monitoring end of the air pressure sensor (202) is connected to a second end of the three-way connecting block (201); and the exhaust on-off valve (203) is connected to a third end of the three-way connecting block (201).

5. The one-way valve weld air tightness testing device according to claim 1, characterized in that: The sliding seat (4) is vertically slidably connected to the frame (1) via a slide rail assembly (41).

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