Air tightness detection device for valve core

Abstract

The utility model discloses an air tightness detection device for a valve core. The air tightness detection device comprises a machine table, a clamp, a sealing mechanism, an air tightness detector and an air source, the clamps are at least arranged on the machine table in pairs, a cavity with an upward opening is formed in the top of each clamp, and a stepped limiting groove is formed in each cavity; the sealing mechanism comprises an upper pressing piece and a lower pressing piece, and the upper pressing piece and the lower pressing piece are arranged above the cavity and at the bottom end of the cavity respectively and used for sealing the upper end face and the lower end face of the valve element. The air tightness detector is mounted on one side of the upper pressing piece, and a detection head of the air tightness detector extends into the upper pressing piece; and the air source is communicated with the pressing piece. According to the utility model, the valve cores with different specifications are limited through the stepped limiting grooves, and the clamps are at least arranged in pairs, so that the valve cores can be detected in batches, and the overall detection efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to an air tightness detection device, in particular to an air tightness detection device for a valve core. Background Art

[0002] The valve core is a valve part that the valve body uses to achieve the basic functions of direction control, pressure control or flow control by moving it. The valve core will be tested for air tightness before leaving the factory to meet the needs of use. The Chinese utility model patent with publication number CN214121536U publicly authorized a valve core air tightness detection device, which constructs a variable limiting structure by setting a first arc groove, a first arc pressure groove, a first receiving groove, a second receiving arc groove, a second arc pressure groove, and a second receiving pressure groove; specifically, different combinations of the above structures are used according to different specifications of the valve core, thereby realizing the detection of different types of valve cores, and having stronger compatibility.

[0003] However, the above valve core air tightness detection device can only detect valve cores of different models one by one, and cannot adapt to the scenario of batch valve core detection, that is, the overall detection efficiency is low. Utility Model Content

[0004] The purpose of the utility model is to overcome the above technical deficiencies, to provide an air tightness detection device for a valve core, and to solve the technical problem of low detection efficiency in the prior art.

[0005] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0006] In the first aspect, the utility model provides an air tightness detection device for a valve core, comprising a machine platform, a fixture, a sealing mechanism, an air tightness detector and an air source; the fixtures are arranged on the machine platform at least in pairs, and the top of the fixture has a cavity with an opening facing upward, and a stepped limit groove is arranged in the cavity; the sealing mechanism comprises an upper pressure piece and a lower pressure piece, and the upper pressure piece and the lower pressure piece are respectively arranged above the cavity and at the bottom of the cavity and are used to seal the upper and lower end faces of the valve core; the air tightness detector is installed on one side of the upper pressure piece, and the detection head of the air tightness detector extends into the upper pressure piece; the air source is connected to the lower pressure piece.

[0007] In some embodiments, the stepped limiting groove has at least three end surfaces, and the opening inner diameter of each of the end surfaces is different.

[0008] In some embodiments, a guide angle is provided at the opening of the end surface.

[0009] In some embodiments, the fixture is a cylindrical structure.

[0010] In some embodiments, the pressing member includes a first cylinder and a first sealing head, a through hole is opened at the bottom of the step limit groove, the first cylinder is used to drive the first sealing head to extend into the through hole and seal the through hole, the output end of the air source is connected to the first sealing head, and the top end of the first sealing head is used to inject pressure.

[0011] In some embodiments, the first sealing head and the through hole are transitionally matched.

[0012] In some embodiments, the upper pressure piece includes a second cylinder, a sleeve and a second sealing head. The second cylinder is used to drive the second sealing head to seal the upper end surface of the valve core. The second sealing head is sleeved in the sleeve, and a detection space is provided in the second sealing head and the sleeve, and the detection head extends into the detection space.

[0013] In some embodiments, at least four clamps are provided, and the sealing mechanisms correspond one to one with the clamps.

[0014] In some embodiments, a clearance groove is opened on one side of the machine platform, and the pressing member is installed in the clearance groove.

[0015] In some embodiments, the bottom end of the platform is provided with supporting feet.

[0016] In a second aspect, the utility model also provides a valve core air tightness detection device,

[0017] Compared with the prior art, the utility model provides a valve core air tightness detection device, which sets a fixture and opens a stepped limit groove in the cavity inside the fixture, so that valve cores of different specifications can be placed at the end faces of the stepped limit groove at different heights, thereby realizing the rough positioning of the valve core; further, the upper and lower end faces of the valve core are sealed by the upper and lower pressure pieces to complete the overall sealing of the valve core, thereby providing conditions for the air tightness detection of the valve core; finally, the valve core is tested by air source injection pressure and an air tightness detector. Since at least two fixtures are set, the air tightness detection device can realize batch detection work for valve cores of different models, effectively improving the overall detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an isometric diagram of an air tightness detection device for a valve core provided by an embodiment of the utility model;

[0019] Figure 2 yes Figure 1 Front view of

[0020] Figure 3 yes Figure 1 A cross-sectional view of the internal structure of the middle sleeve and the second sealing head;

[0021] Figure 4 yes Figure 1 Isometric view of the middle machine;

[0022] Figure 5 yes Figure 1 A schematic diagram of the enlarged structure of the middle fixture;

[0023] Figure 6 yes Figure 5 Top view of .

[0024] Description of reference numerals:

[0025] 100, machine platform; 110, give way groove; 120, support foot; 200, fixture; 210, cavity; 220, step limit groove; 221, end face; 222, through hole; 230, guide angle; 300, sealing mechanism; 310, upper pressure piece; 311, second cylinder; 312, sleeve; 313, second sealing head; 314, detection space; 320, lower pressure piece; 321, first cylinder; 322, first sealing head; 400, air tightness tester; 410, detection head; 500, air source. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0027] In order to solve the technical problem of low detection efficiency, the utility model provides an air tightness detection device for a valve core, which can realize batch detection work.

[0028] It should be noted that the valve core air tightness detection device described in the utility model is used for but not limited to valve core detection, etc. For the convenience of explanation, in the utility model, only an air tightness detection device for a valve core is applied to a valve core air tightness detection device as an example for explanation. The principle of applying an air tightness detection device for a valve core to other types of equipment is substantially the same as the principle applied to the valve core air tightness detection device, which will not be elaborated here.

[0029] See also Figure 1 - Figure 6 ,in Figure 1This is a structural schematic diagram of an air tightness detection device for a valve core in one embodiment of the utility model, an air tightness detection device for a valve core, comprising a machine platform 100, a fixture 200, a sealing mechanism 300, an air tightness detector 400 and an air source 500; the fixtures 200 are arranged on the machine platform 100 at least in pairs, the top of the fixture 200 has a cavity 210 with an opening facing upward, and a stepped limit groove 220 is provided in the cavity 210; the sealing mechanism 300 includes an upper pressing piece 310 and a lower pressing piece 320, the upper pressing piece 310 and the lower pressing piece 320 are respectively arranged above the cavity 210 and at the bottom of the cavity 210 and are used to seal the upper and lower end faces of the valve core; the air tightness detector 400 is installed on one side of the upper pressing piece 310, and the detection head 410 of the air tightness detector 400 extends into the upper pressing piece 310; the air source 500 is connected to the lower pressing piece 320.

[0030] In this embodiment, by providing a stepped limit groove 220 in the cavity 210, valve cores of different specifications can be limited, effectively ensuring compatibility; further, the combined design of the upper pressure piece 310 and the lower pressure piece 320 completely limits the valve core; then, the air tightness tester 400 and the air source 500 are used to complete the air tightness test of the valve core. Due to the paired arrangement of the stepped limit groove 220 and the fixture 200, the valve cores can be tested in batches, which can effectively improve the overall testing efficiency.

[0031] In one embodiment, see Figure 5 - Figure 6 The stepped limiting groove 220 has at least three end surfaces 221 , and the opening inner diameters of each end surface 221 are different.

[0032] In this embodiment, the different inner diameters of the openings of each end face 221 can allow the outer surfaces of valve cores of different specifications to be roughly positioned through the inner walls of different end faces 221, thereby meeting the requirements for the detection of valve cores of different specifications.

[0033] In one embodiment, see Figure 5 - Figure 6 A guide angle 230 is provided at the opening of the end surface 221 .

[0034] In this embodiment, the design of the guide angle 230 makes the loading and unloading of the valve core smoother.

[0035] In one embodiment, see Figure 5 , the fixture 200 is a cylindrical structure.

[0036] In this embodiment, the cylindrical structure design of the clamp 200 makes the clamp 200 more conformable to the shape of the valve core and will not scratch the operator.

[0037] In one embodiment, see Figure 2 , Figure 5, Figure 6 The pressing member 320 includes a first cylinder 321 and a first sealing head 322. A through hole 222 is provided at the bottom of the step limit groove 220. The first cylinder 321 is used to drive the first sealing head 322 to extend into the through hole 222 and seal the through hole 222. The output end of the air source 500 is connected to the first sealing head 322, and the top end of the first sealing head 322 is used to inject pressure.

[0038] Further, in one embodiment, see Figure 2 , Figure 5 , Figure 6 The first sealing head 322 and the through hole 222 are transitionally matched.

[0039] In this embodiment, after the first sealing head 322 completes the transition fit with the through hole 222, the first sealing head 322 immediately blocks the bottom end of the valve core, so that it is easy to achieve complete sealing. In addition, the top end of the first sealing head 322 is connected to the air source 500, so that it is easy to integrate the sealing and pressure supply functions, and it is also easy to achieve rapid injection pressure through the first sealing head 322.

[0040] In one embodiment, see Figure 2 , Figure 3 The upper pressure piece 310 includes a second cylinder 311, a sleeve 312 and a second sealing head 313. The second cylinder 311 is used to drive the second sealing head 313 to seal the upper end surface of the valve core. The second sealing head 313 is sleeved in the sleeve 312, and a detection space 314 is provided in the second sealing head 313 and the sleeve 312. The detection head 410 extends into the detection space 314.

[0041] In this embodiment, when the gas source 500 injects high pressure into the valve core through the detection head 410, once the pressure in the valve core leaks out, it will enter the detection space 314 and be sensed by the detection head 410, which is helpful to quickly understand whether the air tightness is good.

[0042] In one embodiment, see Figure 1 At least four clamps 200 are provided, and the sealing mechanisms 300 correspond to the clamps 200 one by one.

[0043] In this embodiment, the corresponding design of the sealing mechanism 300 and the fixture 200 enables the airtightness detection device to perform batch detection on valve cores, which is beneficial to improving the overall detection efficiency.

[0044] In one embodiment, see Figure 1 - Figure 2 A clearance groove 110 is provided on one side of the machine platform 100 , and the pressing member 320 is installed in the clearance groove 110 .

[0045] In this embodiment, the design of the clearance groove 110 facilitates the maintenance of the pressing member 320 .

[0046] In one embodiment, see Figure 1 A supporting foot 120 is provided at the bottom of the platform 100 .

[0047] In this embodiment, the support legs 120 reserve space for the bottom of the machine 100 to facilitate maintenance.

[0048] In order to better understand the present invention, the following Figures 1 to 6 The technical solution of the utility model is described in detail:

[0049] First, place valve cores of different specifications on the inner walls of different end faces 221 of the stepped limit groove 220 to complete rough positioning; then, start the first cylinder 321 and the second cylinder 311 respectively to seal the upper and lower end faces of the valve core; then, start the air source 500 and inject high pressure into the valve core through the first sealing head 322. Once the air tightness of the valve core is not good, the pressure will leak into the sleeve 312 and be detected by the detection head 410, and then the air tightness detector 400 will feedback data; since the air tightness detection device can perform batch detection on valve cores of different specifications, and the fixture 200 has multiple designs, the overall detection efficiency of the valve core can be effectively improved.

[0050] The above specific implementation methods of the utility model do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A valve core air tightness detection device, characterized in that: include: Machine; A clamp, wherein the clamp is arranged on the machine platform in at least a pair, and the top of the clamp has a cavity with an opening facing upward, and a stepped limiting groove is arranged in the cavity; A sealing mechanism, the sealing mechanism comprising an upper pressing piece and a lower pressing piece, the upper pressing piece and the lower pressing piece are respectively arranged above the cavity and at the bottom of the cavity and are used to seal the upper and lower end surfaces of the valve core; An air tightness detector, which is installed on one side of the upper pressing piece, and a detection head of the air tightness detector extends into the upper pressing piece; An air source is communicated with the pressing member.

2. The air tightness detection device for a valve core according to claim 1, characterized in that: The stepped limiting groove has at least three end faces, and the opening inner diameters of each end face are different.

3. The air tightness detection device for a valve core according to claim 1, characterized in that: A guide angle is provided at the opening of the end surface.

4. The air tightness detection device for a valve core according to claim 1, characterized in that: The clamp is a cylindrical structure.

5. The air tightness detection device for a valve core according to claim 1, characterized in that: The pressing member includes a first cylinder and a first sealing head. A through hole is provided at the bottom of the stepped limit groove. The first cylinder is used to drive the first sealing head to extend into the through hole and seal the through hole. The output end of the gas source is connected to the first sealing head, and the top end of the first sealing head is used to inject pressure.

6. The air tightness detection device for a valve core according to claim 5, characterized in that: The first sealing head and the through hole are in transition fit.

7. The air tightness detection device for a valve core according to claim 1, characterized in that: The upper pressure piece includes a second cylinder, a sleeve and a second sealing head. The second cylinder is used to drive the second sealing head to seal the upper end surface of the valve core. The second sealing head is sleeved in the sleeve, and a detection space is provided in the second sealing head and the sleeve. The detection head extends into the detection space.

8. The air tightness detection device for a valve core according to claim 7, characterized in that: At least four clamps are provided, and the sealing mechanisms correspond to the clamps one by one.

9. The air tightness detection device for a valve core according to claim 1, characterized in that: A clearance groove is provided on one side of the machine platform, and the pressing member is installed in the clearance groove.

10. The air tightness detection device for a valve core according to claim 1, characterized in that: The bottom end of the machine platform is provided with supporting feet.

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