An external one-way valve

Abstract

The utility model discloses an external one-way valve, including an inlet valve and an outlet valve connected to a pump head, wherein the inlet valve includes a lower valve assembly and a lower pipe assembly, wherein the upper part of the lower valve assembly is threadedly sleeved with the inlet end of the pump head; the lower pipe assembly includes a lower pipe sleeve and a lower pipe cap, wherein the upper end face of the lower pipe sleeve abuts against the lower end face of the lower valve assembly, and the lower pipe cap sleeves and fixes the lower pipe sleeve and the lower valve assembly; the outlet valve includes an upper valve assembly and an upper pipe assembly, wherein the lower part of the upper valve assembly is threadedly sleeved with the outlet end of the pump head; the upper pipe assembly includes an upper pipe sleeve and an upper pipe cap, wherein the lower end face of the upper pipe sleeve abuts against the upper end face of the upper valve assembly, and the upper pipe cap sleeves and fixes the upper pipe sleeve and the upper valve assembly. The present application designs an external inlet valve and an outlet valve, places a valve ball outside the pump head (i.e., the valve cavity is placed outside the pump head), so as to increase the accommodating space of the valve ball to accommodate a large valve ball, and at the same time, uses an external pipe cap to connect a large-diameter through pipe (such as DN25) externally.

Description

Technical Field

[0001] The utility model belongs to the technical field of one-way valves, and in particular relates to an external one-way valve. Background Art

[0002] The inside of the diaphragm pump head has a longitudinally penetrating medium channel, and the media usually transported include granular media, high-viscosity media, high-pressure media and high-temperature media, etc. A one-way valve is required in the diaphragm pump head mechanism to control the one-way flow of the medium.

[0003] The existing one-way valve has a small diameter and can only be used to connect a DN15 pipe and can only accommodate a small valve ball. If a large-diameter pipe needs to be connected, the one-way valve is poorly compatible with the large-diameter pipe, which can easily lead to medium leakage. Utility Model Content

[0004] In order to make up for the deficiencies of the prior art, the utility model aims to provide an external one-way valve to solve the problem that the existing one-way valve cannot be used for large valve balls and large diameters. To achieve this purpose, the specific technical solution of this application is as follows:

[0005] The external one-way valve comprises an inlet valve and an outlet valve connected to the pump head, wherein the inlet valve comprises a lower valve assembly and a lower connecting pipe assembly, wherein the upper portion of the lower valve assembly is threadedly sleeved with the inlet end of the pump head; the lower connecting pipe assembly comprises a lower connecting pipe sleeve and a lower connecting pipe cap, wherein the upper end surface of the lower connecting pipe sleeve abuts against the lower end surface of the lower valve assembly, and the lower connecting pipe cap sleeves and fixes the lower connecting pipe sleeve and the lower valve assembly;

[0006] The outlet valve includes an upper valve assembly and an upper connecting pipe assembly, the lower portion of the upper valve assembly is threadedly sleeved with the outlet end of the pump head; the upper connecting pipe assembly includes an upper connecting pipe sleeve and an upper connecting pipe cap, the lower end surface of the upper connecting pipe sleeve abuts against the upper end surface of the upper valve assembly, and the upper connecting pipe cap sleeves and fixes the upper connecting pipe sleeve and the upper valve assembly.

[0007] Furthermore, a lower annular boss is arranged on the upper part of the lower pipe sleeve, and a lower clamping platform is arranged on the bottom of the lower pipe cap, the lower clamping platform is clamped and matched with the lower annular boss, and the inner wall of the lower pipe cap is provided with an internal thread which is screwed and matched with the annular outer wall of the lower valve seat.

[0008] Furthermore, the lower valve assembly includes a lower valve body and a lower valve seat, the lower valve body and the lower valve seat are integrally arranged, a lower valve cavity is arranged in the lower valve body, a lower valve ball is arranged in the lower valve cavity, the lower valve ball is movably abutted against the valve inlet of the lower flow channel in the lower valve seat; the upper part of the lower valve body is threadedly sleeved with the inlet end of the pump head, and the lower end face of the lower valve seat is abutted against the upper end face of the lower connecting pipe sleeve.

[0009] Furthermore, a plurality of lower flow guide holes communicating with the lower valve cavity are arranged on the upper portion of the lower valve body, and a plurality of lower guide ribs are arranged on the inner wall of the lower valve cavity to guide the vertical movement of the lower valve ball.

[0010] Furthermore, the upper end surface of the lower valve cavity is lower than the lower end surface of the pump head.

[0011] Furthermore, the upper valve assembly includes an upper valve body and an upper valve seat, the top end surface of the upper valve body abuts against the end surface of the upper pipe sleeve, and the lower portion of the upper valve seat is threadedly sleeved with the outlet end of the pump head.

[0012] Furthermore, an upper annular boss is provided at the lower part of the upper pipe sleeve, an upper clamping platform is provided at the top of the upper pipe cap, the upper clamping platform is clamped and matched with the upper annular boss, and an internal thread is provided on the inner wall of the upper pipe cap and is screwed and matched with an external thread provided on the annular outer wall of the upper valve body.

[0013] Furthermore, an upper valve cavity is arranged in the upper valve body, and an upper valve ball is arranged in the upper valve cavity. The upper valve ball is movably abutted against the valve outlet of the upper flow channel in the upper valve seat; a plurality of upper guide holes connected to the upper valve cavity are arranged on the upper part of the upper valve body, and a plurality of upper guide ribs are arranged on the inner wall of the upper valve cavity to guide the vertical movement of the upper valve ball.

[0014] Furthermore, the lower end surface of the upper valve cavity is higher than the upper end surface of the pump head.

[0015] Compared with the prior art, the utility model has the following advantages: the application designs an external inlet valve and an outlet valve, places the valve ball outside the pump head (that is, the valve cavity is placed outside the pump head) to increase the accommodating space of the valve ball to accommodate a large valve ball, and at the same time uses an external pipe cap to connect a large-diameter pipe (such as DN25). The pump head of the application can choose to use different one-way valves according to the scenario. When the flow rate is small and the diameter is small, the existing traditional one-way valve can be selected; and when the flow rate is large, the diameter is large, and the one-way valve of the application can be selected. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is one of the structural diagrams of the utility model;

[0017] Figure 2 This is the second structural diagram of the utility model;

[0018] Figure 3 It is an internal sectional view of the present utility model.

[0019] In the figure: 100-pump head, 200-inlet valve, 210-lower valve assembly, 211-lower valve body, 212-lower valve seat, 213-lower valve cavity, 214-lower valve ball, 215-lower guide hole, 216-lower guide rib, 220-lower connecting pipe assembly, 221-lower connecting pipe sleeve, 2211-lower annular boss, 222-lower connecting pipe cap, 2221-lower clamping table, 300-outlet valve, 310-upper valve assembly, 311-upper valve body, 312-upper valve seat, 313-upper valve cavity, 314-upper valve ball, 315-upper guide hole, 316-upper guide rib, 320-upper connecting pipe assembly, 321-upper connecting pipe sleeve, 3211-upper annular boss, 322-upper connecting pipe cap, 3221-upper clamping table. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the present invention is further described below in conjunction with the accompanying drawings.

[0021] like Figure 1-Figure 3 As shown, an external one-way valve includes an inlet valve 200 and an outlet valve 300 connected to a pump head 100, wherein the inlet valve 200 includes a lower valve assembly 210 and a lower pipe assembly 220, wherein the upper portion of the lower valve assembly 210 is threadedly sleeved with the inlet end of the pump head 100; the lower pipe assembly 220 includes a lower pipe sleeve 221 and a lower pipe cap 222, wherein the upper end surface of the lower pipe sleeve 221 abuts against the lower end surface of the lower valve assembly 210, and the lower pipe cap 222 sleeves The lower pipe sleeve 221 and the lower valve assembly 210 are connected and fixed; the outlet valve 300 includes an upper valve assembly 310 and an upper pipe sleeve assembly 320, and the lower part of the upper valve assembly 310 is threadedly sleeved with the outlet end of the pump head 100; the upper pipe sleeve assembly 320 includes an upper pipe sleeve 321 and an upper pipe cap 322, the lower end surface of the upper pipe sleeve 321 abuts against the upper end surface of the upper valve assembly 310, and the upper pipe cap 322 is sleeved and fixed to the upper pipe sleeve 321 and the upper valve assembly 310.

[0022] Continue reading Figure 3 It can be seen that the lower valve assembly 210 includes a lower valve body 211 and a lower valve seat 212, which are integrally arranged. A lower valve cavity 213 is arranged in the lower valve body 211, and a lower valve ball 214 is arranged in the lower valve cavity 213. The lower valve ball 214 is movably abutted against the inlet valve port of the lower flow channel in the lower valve seat 212; the upper part of the lower valve body 211 is threadedly sleeved with the inlet end of the pump head 100, and the lower end face of the lower valve seat 212 is abutted against the upper end face of the lower pipe sleeve 221. A plurality of lower guide holes 215 communicating with the lower valve cavity 213 are arranged in the upper part of the lower valve body 211, and a plurality of lower guide ribs 216 are arranged on the inner wall of the lower valve cavity 213 to guide the lower valve ball 214 to move vertically. In the present application, the upper end surface of the lower valve cavity 213 is lower than the lower end surface of the pump head 100 (ie, the lower valve ball 214 is placed outside the pump head 100 ), so that the space of the lower valve cavity 213 can be designed to be larger to accommodate a larger lower valve ball 214 .

[0023] In order to ensure the sealing of the connection between the lower valve seat 212, the lower pipe sleeve 221 and the lower pipe cap 222 to avoid medium leakage, a lower annular boss 2211 is arranged on the upper part of the lower pipe sleeve 221, and a lower clamping platform 2221 is arranged on the bottom of the lower pipe cap 222. The lower clamping platform 2221 is clamped and matched with the lower annular boss 2211, and the inner wall of the lower pipe cap 222 is provided with an internal thread, which is screwed with the external thread arranged on the annular outer wall of the lower valve seat 212.

[0024] The upper valve assembly 310 includes an upper valve body 311 and an upper valve seat 312. The top end face of the upper valve body 311 abuts against the end face of the upper pipe sleeve 321, and the lower part of the upper valve seat 312 is threadedly sleeved with the outlet end of the pump head 100. An upper valve cavity 313 is arranged in the upper valve body 311, and an upper valve ball 314 is arranged in the upper valve cavity 313. The upper valve ball 314 movably abuts against the valve outlet of the upper flow channel in the upper valve seat 312; a plurality of upper guide holes 315 connected with the upper valve cavity 313 are arranged on the upper part of the upper valve body 311, and a plurality of upper guide ribs 316 are arranged on the inner wall of the upper valve cavity 313 to guide the vertical movement of the upper valve ball 314. In the present application, the lower end face of the upper valve cavity 313 is higher than the upper end face of the pump head 100 (that is, the upper valve ball 314 is placed outside the pump head 100), so that the space of the upper valve cavity 313 can be designed to be larger to accommodate a larger upper valve ball 314.

[0025] In order to ensure the sealing of the connection between the upper valve body 311, the upper pipe sleeve 321 and the upper pipe cap 322 to avoid medium leakage, an upper annular boss 3211 is set at the lower part of the upper pipe sleeve 321, and an upper clamping platform 3221 is set at the top of the upper pipe cap 322. The upper clamping platform 3221 is clamped and matched with the upper annular boss 3211, and the inner wall of the upper pipe cap 322 is provided with an internal thread which is screwed with the external thread provided on the annular outer wall of the upper valve body 311.

[0026] The present application uses an external upper pipe cap 322 and a lower pipe cap 222 to respectively connect an upper pipe sleeve 321 and a lower pipe sleeve 221 to achieve docking with a large-diameter through pipe (such as DN25).

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An external one-way valve, comprising an inlet valve (200) and an outlet valve (300) connected to a pump head (100), characterized in that: The inlet valve (200) comprises a lower valve assembly (210) and a lower pipe assembly (220), the upper portion of the lower valve assembly (210) being threadedly sleeved with the inlet end of the pump head (100); the lower pipe assembly (220) comprising a lower pipe sleeve (221) and a lower pipe cap (222), the upper end surface of the lower pipe sleeve (221) being in contact with the lower end surface of the lower valve assembly (210), and the lower pipe cap (222) being sleeved and fixed to the lower pipe sleeve (221) and the lower valve assembly (210); The outlet valve (300) comprises an upper valve assembly (310) and an upper pipe assembly (320); the lower portion of the upper valve assembly (310) is threadedly sleeved with the outlet end of the pump head (100); The upper pipe assembly (320) comprises an upper pipe sleeve (321) and an upper pipe cap (322); the lower end surface of the upper pipe sleeve (321) abuts against the upper end surface of the upper valve assembly (310); and the upper pipe cap (322) sleeves and fixes the upper pipe sleeve (321) and the upper valve assembly (310).

2. An external one-way valve according to claim 1, characterized in that: A lower annular boss (2211) is arranged on the upper part of the lower pipe sleeve (221), and a lower clamping platform (2221) is arranged on the bottom of the lower pipe cap (222). The lower clamping platform (2221) is clamped and matched with the lower annular boss (2211), and an internal thread is arranged on the inner wall of the lower pipe cap (222) and is threadedly matched with an external thread arranged on the annular outer wall of the lower valve seat (212) of the lower valve assembly (210).

3. An external one-way valve according to claim 2, characterized in that: The lower valve assembly (210) comprises a lower valve body (211) and a lower valve seat (212); the lower valve body (211) and the lower valve seat (212) are integrally arranged; a lower valve cavity (213) is arranged in the lower valve body (211); a lower valve ball (214) is arranged in the lower valve cavity (213); the lower valve ball (214) is movably abutted against the valve inlet of the lower flow channel in the lower valve seat (212); the upper portion of the lower valve body (211) is threadedly sleeved with the inlet end of the pump head (100); the lower end face of the lower valve seat (212) is end-face abutted against the upper end face of the lower pipe sleeve (221).

4. An external one-way valve according to claim 3, characterized in that: The upper portion of the lower valve body (211) is provided with a plurality of lower flow guide holes (215) in communication with the lower valve cavity (213), and the inner wall of the lower valve cavity (213) is provided with a plurality of lower guide ribs (216) to guide the vertical movement of the lower valve ball (214).

5. An external one-way valve according to claim 3 or 4, characterized in that: The upper end surface of the lower valve chamber (213) is lower than the lower end surface of the pump head (100).

6. The external 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 seat (312); the top end surface of the upper valve body (311) abuts against the end surface of the upper pipe sleeve (321); and the lower portion of the upper valve seat (312) is threadedly sleeved with the outlet end of the pump head (100).

7. An external one-way valve according to claim 6, characterized in that: An upper annular boss (3211) is provided at the lower portion of the upper pipe sleeve (321), an upper clamping platform (3221) is provided at the top of the upper pipe cap (322), the upper clamping platform (3221) is clamped and matched with the upper annular boss (3211), and an internal thread is provided on the inner wall of the upper pipe cap (322) and is threadedly matched with an external thread provided on the annular outer wall of the upper valve body (311).

8. An external one-way valve according to claim 6, characterized in that: An upper valve cavity (313) is arranged in the upper valve body (311), and an upper valve ball (314) is arranged in the upper valve cavity (313). The upper valve ball (314) is movably abutted against a valve outlet of an upper flow channel in an upper valve seat (312); a plurality of upper guide holes (315) communicating with the upper valve cavity (313) are arranged on the upper portion of the upper valve body (311), and a plurality of upper guide ribs (316) are arranged on the inner wall of the upper valve cavity (313) to guide the upper valve ball (314) to move vertically.

9. An external one-way valve according to claim 8, characterized in that: The lower end surface of the upper valve chamber (313) is higher than the upper end surface of the pump head (100).

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