Split type one-way valve of leakage-free structure

Abstract

The one-way valve of the split type leakage-free structure comprises a liquid inlet valve and a liquid outlet valve, the liquid inlet valve comprises a first lower valve assembly and a second lower valve assembly, and the upper portion of the first lower valve assembly is sleeved with the inlet end of a pump head in a threaded mode; the upper portion of the second lower valve assembly is sleeved with the first lower valve assembly in a threaded mode, and a first sealing groove is formed in the upper end face of the second lower valve assembly and matched with a sealing ring to achieve end face sealing with the first lower valve assembly. The liquid outlet valve comprises a first upper valve assembly and a second upper valve assembly, the lower portion of the first upper valve assembly is sleeved with the second upper valve assembly in a threaded mode, the lower portion of the second upper valve assembly is sleeved with the outlet end of the pump head in a threaded mode, and the lower end face of the first upper valve assembly is provided with a second sealing groove matched with a sealing ring to achieve end face sealing with the second upper valve assembly. According to the one-way valve, the first lower valve assembly, the second lower valve assembly and the pump head are in threaded sleeving connection and end face sealing, and the first upper valve assembly, the second upper valve assembly and the pump head are in threaded sleeving connection and end face sealing, so that the situation of medium leakage in the using process of the one-way valve is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of check valves, and particularly relates to a check valve with a split leak-free structure. Background Art

[0002] The interior of a diaphragm pump head has a longitudinally penetrating medium channel, and the commonly transported media include particulate media, high-viscosity media, high-pressure media, high-temperature media, etc. A check valve is required in the diaphragm pump head mechanism to control the one-way flow of the medium. In the existing check valves, the valve body and the valve seat are of an integral structure, and a valve gasket is used for sealing between the valve seat and the pump head. The valve gasket is easily damaged, resulting in leakage, and also causing a small and unstable flow rate. Summary of the Utility Model

[0003] In order to make up for the deficiencies of the prior art, the utility model provides a check valve with a split leak-free structure. Through the design of the valve seat and the valve body with split threaded sleeves, leakage of the check valve can be avoided, making the check valve more sealed. Specifically, the technical solution of the present application is as follows:

[0004] A check valve with a split leak-free structure includes a pump head, an inlet valve, and an outlet valve. The inlet valve includes a lower valve assembly one and a lower valve assembly two. The upper part of the lower valve assembly one is threadedly sleeved inside the inlet end of the pump head; the upper part of the lower valve assembly two is threadedly sleeved inside the lower valve assembly one, and a first sealing groove is provided on the upper end face of the lower valve assembly two to cooperate with a sealing ring to achieve end face sealing with the lower valve assembly one; the outlet valve includes an upper valve assembly one and an upper valve assembly two. The lower part of the upper valve assembly one is threadedly sleeved inside the upper valve assembly two, and the lower part of the upper valve assembly two is threadedly sleeved inside the outlet end of the pump head, and a second sealing groove is provided on the lower end face of the upper valve assembly one to cooperate with a sealing ring to achieve end face sealing with the upper valve assembly two.

[0005] Further, the upper valve assembly one includes an upper valve body and an upper valve cavity provided inside the upper valve body. An upper valve ball is arranged inside the upper valve cavity; the upper valve assembly two includes an upper valve seat and an upper flow channel provided inside the upper valve seat. The upper valve ball is movably abutted against the outlet of the upper flow channel to achieve the outflow of the medium.

[0006] Further, a second sealing groove is provided on the lower end face of the upper valve body to cooperate with a sealing ring to achieve end face sealing with the upper valve seat; a fourth sealing groove is provided on the lower end face of the upper valve seat to cooperate with a sealing ring to achieve end face sealing with the outlet end of the pump head.

[0007] Further, a plurality of upper diversion holes communicating with the upper valve cavity are provided at the liquid outlet at the upper part of the upper valve body; and a plurality of upper guiding ribs are provided on the inner wall of the upper valve cavity to guide the vertical movement of the upper valve ball.

[0008] Further, the first lower valve assembly includes a valve sleeve and a downstream flow channel disposed within the valve sleeve. The second lower valve assembly includes an integrally formed lower valve body and a lower valve seat. A lower valve cavity is disposed within the lower valve body, and a lower valve ball is disposed within the lower valve cavity. The lower valve ball is movably abutted against the liquid inlet of the lower valve seat to allow the medium to enter.

[0009] Further, a third sealing groove is provided on the upper end surface of the valve sleeve, and a sealing ring is used in cooperation with the third sealing groove to achieve end face sealing with the inlet end of the pump head; a first sealing groove is provided on the upper end surface of the lower valve body, and a sealing ring is used in cooperation with the first sealing groove to achieve end face sealing with the valve sleeve.

[0010] Further, a plurality of lower diversion holes communicating with the lower valve cavity are provided at the liquid inlet of the lower part of the valve sleeve, and a plurality of lower guiding ribs are provided on the inner wall of the lower valve cavity to guide the vertical movement of the lower valve ball.

[0011] Compared with the prior art, the present utility model has the following advantages:

[0012] (1) In this application, the inlet valve is designed as a split first lower valve assembly and second lower valve assembly. The first lower valve assembly and the second lower valve assembly are threadedly sleeved and end face sealed by providing a first sealing groove and using a sealing ring in cooperation; and the first lower valve assembly is threadedly sleeved with the inlet end of the pump head and end face sealed by the third sealing groove and the sealing ring; ensuring the sealing performance of the first lower valve assembly, the second lower valve assembly and the inlet end of the pump head, and avoiding the occurrence of medium leakage of the inlet valve during use.

[0013] (2) In this application, the outlet valve is designed as a split first upper valve assembly and second upper valve assembly. The first upper valve assembly and the second upper valve assembly are threadedly sleeved and end face sealed by providing a second sealing groove and using a sealing ring in cooperation; and the second upper valve assembly is threadedly sleeved with the outlet end of the pump head and end face sealed by the fourth sealing groove and the sealing ring; ensuring the sealing performance of the first upper valve assembly, the second upper valve assembly and the outlet end of the pump head, and being able to avoid the occurrence of medium leakage of the outlet valve during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is one of the structural schematic diagrams of the present utility model;

[0015] Figure 2 is another structural schematic diagram of the present utility model;

[0016] Figure 3 is the third structural schematic diagram of the present utility model;

[0017] Figure 4 is of the present utility model Figure 2 sectional view taken along line A-A in;

[0018] Figure 5 is of the present utility model Figure 3 sectional view taken along line B-B in.

[0019] In the figure: 100 - pump head, 200 - liquid inlet valve, 210 - lower valve assembly one, 211 - valve sleeve, 212 - downstream channel, 220 - lower valve assembly two, 221 - lower valve body, 222 - lower valve seat, 223 - lower valve cavity, 224 - lower valve ball, 225 - lower diversion hole, 226 - lower guiding rib, 230 - first sealing groove, 240 - third sealing groove, 300 - liquid outlet valve, 310 - upper valve assembly one, 311 - upper valve body, 312 - upper valve cavity, 313 - upper valve ball, 314 - upper diversion hole, 315 - upper guiding rib, 320 - upper valve assembly two, 321 - upper valve seat, 322 - upstream channel, 330 - second sealing groove, 340 - fourth sealing groove. Detailed implementation mode

[0020] To enable those skilled in the art to more clearly understand the technical solution of the present application, the present utility model will be further described below with reference to the accompanying drawings.

[0021] As Figures 1-5 shown, a one-way valve with a split - type leak - free structure includes a liquid inlet valve 200 arranged at the inlet end of the pump head 100 and a liquid outlet valve 300 arranged at the outlet end. The liquid inlet valve 200 includes a lower valve assembly one 210 and a lower valve assembly two 220. The upper part of the lower valve assembly one 210 is threadedly sleeved inside the inlet end of the pump head 100; the upper part of the lower valve assembly two 220 is threadedly sleeved inside the lower valve assembly one 210, and a first sealing groove 230 is arranged on the upper end face of the lower valve assembly two 220 to cooperate with a sealing ring to achieve end - face sealing with the lower valve assembly one 210. The liquid outlet valve 300 includes an upper valve assembly one 310 and an upper valve assembly two 320. The lower part of the upper valve assembly one 310 is threadedly sleeved inside the upper valve assembly two 320, and the lower part of the upper valve assembly two 320 is threadedly sleeved inside the outlet end of the pump head 100, and a second sealing groove 330 is arranged on the lower end face of the upper valve assembly one 310 to cooperate with a sealing ring to achieve end - face sealing with the upper valve assembly two 320.

[0022] Specifically, the upper valve assembly one 310 includes an upper valve body 311 and an upper valve cavity 312 arranged inside the upper valve body 311, and an upper valve ball 313 is arranged inside the upper valve cavity 312; the upper valve assembly two 320 includes an upper valve seat 321 and an upstream channel 322 arranged inside the upper valve seat 321, and the upper valve ball 313 is movably abutted against the outlet of the upstream channel 322 to realize the outflow of the medium. A second sealing groove 330 is arranged on the lower end face of the upper valve body 311 to cooperate with a sealing ring to achieve end - face sealing with the upper valve seat 321; a fourth sealing groove 340 is arranged on the lower end face of the upper valve seat 321 to cooperate with a sealing ring to achieve end - face sealing with the outlet end of the pump head 100. A plurality of upper diversion holes 314 communicating with the upper valve cavity 312 are arranged at the liquid outlet of the upper part of the upper valve body 311; and a plurality of upper guiding ribs 315 are arranged on the inner wall of the upper valve cavity 312 to guide the vertical movement of the upper valve ball 313.

[0023] It can be understood that in the present application, the liquid outlet valve 300 is designed as a split upper valve assembly one 310 and upper valve assembly two 320. The upper valve body 311 of the upper valve assembly one 310 and the upper valve seat 321 of the upper valve assembly two 320 are threadedly sleeved, and end face sealing is carried out by arranging a second sealing groove 330 and cooperating with a sealing ring; and the upper valve seat 321 is threadedly sleeved with the outlet end of the pump head 100, and end face sealing is carried out by the fourth sealing groove 340 and the sealing ring; ensuring the sealing performance between the upper valve assembly one 310, the upper valve assembly two 320 and the pump head 100, and avoiding the occurrence of medium leakage during the use of the check valve.

[0024] Continue to refer to Figure 4 and Figure 5 As can be seen, the lower valve assembly one 210 includes a valve sleeve 211 and a downstream channel 212 arranged inside the valve sleeve 211. The lower valve assembly two 220 includes an integrally arranged lower valve body 221 and a lower valve seat 222. A lower valve cavity 223 is arranged inside the lower valve body 221, and a lower valve ball 224 is arranged inside the lower valve cavity 223. The lower valve ball 224 is in movable abutment with the liquid inlet in the lower valve seat 222 to realize the entry of the medium. A third sealing groove 240 is arranged on the upper end face of the valve sleeve 211 and cooperates with a sealing ring to realize end face sealing with the inlet end of the pump head 100; a first sealing groove 230 is arranged on the upper end face of the lower valve body 221 and cooperates with a sealing ring to realize end face sealing with the valve sleeve 211. A plurality of lower diversion holes 225 communicating with the lower valve cavity 223 are arranged at the liquid inlet at the lower part of the valve sleeve 211, and a plurality of lower guide ribs 226 are arranged on the inner wall of the lower valve cavity 223 to guide the vertical movement of the lower valve ball 224.

[0025] It can be understood that in the present application, the liquid inlet valve 200 is designed as a split lower valve assembly one 210 and lower valve assembly two 220. The valve sleeve 211 of the lower valve assembly one 210 and the lower valve body 221 of the lower valve assembly two 220 are threadedly sleeved, and end face sealing is carried out by arranging a first sealing groove 230 and cooperating with a sealing ring; and the valve sleeve 211 is threadedly sleeved with the inlet end of the pump head 100, and end face sealing is carried out by the third sealing groove 240 and the sealing ring; ensuring the sealing performance between the lower valve assembly one 210, the lower valve assembly two 220 and the pump head 100, and avoiding the occurrence of medium leakage during the use of the check valve.

[0026] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A split-type non-leakage one-way valve, comprising a pump head (100), a liquid inlet valve (200) and a liquid outlet valve (300), characterized in that: The liquid inlet valve (200) comprises a lower valve component 1 (210) and a lower valve component 2 (220), wherein the upper portion of the lower valve component 1 (210) is threadedly sleeved in the inlet end of the pump head (100); the upper portion of the lower valve component 2 (220) is threadedly sleeved in the lower valve component 1 (210), and a first sealing groove (230) is provided on the upper end surface of the lower valve component 2 (220) to cooperate with a sealing ring to achieve end surface sealing with the lower valve component 1 (210); The liquid outlet valve (300) comprises an upper valve component 1 (310) and an upper valve component 2 (320), wherein the lower portion of the upper valve component 1 (310) is threadedly sleeved in the upper valve component 2 (320), and the lower portion of the upper valve component 2 (320) is threadedly sleeved in the outlet end of the pump head (100), and a second sealing groove (330) is provided on the lower end surface of the upper valve component 1 (310) to cooperate with a sealing ring to achieve end surface sealing with the upper valve component 2 (320).

2. A split-type non-leakage one-way valve according to claim 1, characterized in that: The upper valve assembly (310) comprises an upper valve body (311) and an upper valve cavity (312) arranged in the upper valve body (311), and an upper valve ball (313) is arranged in the upper valve cavity (312); the upper valve assembly (320) comprises an upper valve seat (321) and an upper flow channel (322) arranged in the upper valve seat (321), and the upper valve ball (313) is movably abutted against the valve outlet of the upper flow channel (322) to realize the outflow of the medium.

3. A split-type non-leakage one-way valve according to claim 2, characterized in that: The lower end surface of the upper valve body (311) is provided with a second sealing groove (330) which cooperates with the sealing ring and the upper valve seat (321) to achieve end surface sealing; the lower end surface of the upper valve seat (321) is provided with a fourth sealing groove (340) which cooperates with the sealing ring and the outlet end of the pump head (100) to achieve end surface sealing.

4. A split-type non-leakage one-way valve according to claim 2, characterized in that: The liquid outlet at the top of the upper valve body (311) is provided with a plurality of upper guide holes (314) in communication with the upper valve cavity (312); and the inner wall of the upper valve cavity (312) is provided with a plurality of upper guide ribs (315) to guide the upper valve ball (313) to move vertically.

5. A split-type non-leakage one-way valve according to claim 1, characterized in that: The lower valve assembly (210) comprises a valve sleeve (211) and a lower flow channel (212) arranged in the valve sleeve (211); the lower valve assembly (220) comprises a lower valve body (221) and a lower valve seat (222) which are arranged integrally; a lower valve cavity (223) is arranged in the lower valve body (221); a lower valve ball (224) is arranged in the lower valve cavity (223); the lower valve ball (224) is movably abutted against a liquid inlet in the lower valve seat (222) to enable entry of a medium.

6. A split-type non-leakage one-way valve according to claim 5, characterized in that: The upper end surface of the valve sleeve (211) is provided with a third sealing groove (240) which cooperates with the sealing ring to realize end surface sealing with the inlet end of the pump head (100); and the upper end surface of the lower valve body (221) is provided with a first sealing groove (230) which cooperates with the sealing ring to realize end surface sealing with the valve sleeve (211).

7. A split-type non-leakage one-way valve according to claim 5, characterized in that: The liquid inlet at the lower part of the valve sleeve (211) is provided with a plurality of lower guide holes (225) communicating with the lower valve cavity (223), and the inner wall of the lower valve cavity (223) is provided with a plurality of lower guide ribs (226) to guide the vertical movement of the lower valve ball (224).

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