A one-way valve with easy maintenance

Abstract

The utility model belongs to valve technical field relates to hydraulic control system, concretely is a kind of one-way valve of easy maintenance, including valve body, valve core, hollow valve seat, spring, step pressure block, block circle, pressure block bolt, sealing ring and steel ball;Valve cavity is equipped in the valve body, the valve cavity is in order from top to bottom bolt installation threaded hole section, pressure block installation step hole section, valve seat installation step hole section, the lower part of the valve body is equipped with medium inflow hole section, the medium inflow hole section inner end is connected with valve seat installation step hole section, and the middle part of the valve body is horizontally equipped with medium outflow hole section;The hollow valve seat is installed in the valve seat installation step hole section of valve body, and the upper end inner mouth of the hollow valve seat is assembled with steel ball.The utility model has the advantages of reasonable design, simple structure and good practical application value.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology and relates to hydraulic control systems, specifically a one-way valve that is easy to maintain. Background Technology

[0002] Currently, conventional check valves are pipe-type check valves. When a check valve malfunctions, it is necessary to disassemble the medium inlet and outlet pipes of the check valve, which results in low maintenance efficiency. In addition, repeated disassembly of pipe-type check valves can easily damage the seal between the relevant pipelines and the check valve, causing secondary damage to the hydraulic system. Utility Model Content

[0003] Based on the above defects and shortcomings, this utility model proposes a new type of easy-to-maintain check valve, which can shorten maintenance time, ensure the sealing of the medium inlet pipe, the medium outlet pipe and the check valve, and improve the overall reliability.

[0004] This utility model is achieved using the following technical solution:

[0005] An easy-to-maintain check valve includes a valve body, a valve core, a hollow valve seat, a spring, a stepped pressure block, a sealing ring, a pressure block bolt, a sealing ring, and a steel ball.

[0006] The valve body has a valve cavity, which, from top to bottom, consists of a bolt mounting threaded hole section, a pressure block mounting stepped hole section, and a valve seat mounting stepped hole section. A medium inflow hole section is located in the lower part of the valve body, and its inner end communicates with the valve seat mounting stepped hole section. A medium outflow hole section is horizontally located in the middle of the valve body. A hollow valve seat is mounted on the valve seat mounting stepped hole section of the valve body, and a steel ball is fitted into the inner opening of the upper end of the hollow valve seat. A sealing ring and a sealing ring are fitted onto the stepped pressure block, which is mounted on the pressure block mounting stepped hole section of the valve body. The sealing ring is located between the stepped surface of the stepped pressure block and the stepped surface of the mounting step hole section of the pressure block; the inner cavity of the stepped pressure block is equipped with a valve core and a spring, and the valve core, under the action of the spring, presses the steel ball against the upper port of the inner hole of the hollow valve seat through the spherical groove at its lower end; the lower side wall of the stepped pressure block is provided with an annular groove and one or more through holes communicating with the annular groove in the radial direction, and the annular groove is connected to the inner end of the medium outflow hole section; a gap is left between the lower part of the valve core and the inner cavity of the stepped pressure block; the pressure block bolt is assembled into the bolt mounting threaded hole section of the valve body and presses the stepped pressure block tightly.

[0007] During operation, the medium flows into the hollow valve seat of valve 1 through the medium outlet section. Under pressure, the steel ball is lifted up, and the valve core compresses the spring as the steel ball moves upward. The medium flows through the gap between the valve core and the inner cavity of the stepped pressure block into multiple radial through holes of the stepped pressure block, and then flows into the annular groove before entering the medium outlet section. Conversely, under the action of the spring, the valve core presses the steel ball against the upper port of the inner hole of the hollow valve seat through the spherical groove at its lower end, achieving a seal.

[0008] In a further preferred embodiment, the upper end of the valve core is provided with a limiting boss, and the lower end of the spring is assembled on the limiting boss to achieve positioning.

[0009] More preferably, the upper port of the inner hole of the hollow valve seat is provided with an inner conical chamfer for achieving a line seal with the steel ball; the inner cavity port of the stepped pressure block is provided with a groove; the upper outer side of the hollow valve seat is provided with an outer conical chamfer for achieving a line seal with the edge of the groove; and the lower outer side of the hollow valve seat is provided with an outer conical chamfer for achieving a line seal with the inner edge of the valve seat mounting stepped hole section.

[0010] More preferably, the upper end face of the stepped pressure block is provided with a threaded hole for disassembly.

[0011] More preferably, the valve core is hollow and has one or more through holes in the radial direction.

[0012] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0013] This invention changes the coaxial axis of the one-way valve's opening and closing mechanism from a coaxial axis to a 90-degree bent axis. It utilizes a stepped pressure block with an annular groove to achieve sealing of the one-way valve. The stepped shaft structure facilitates easy disassembly of the internal parts of the one-way valve. After an internal seal failure, the improved one-way valve eliminates the need to disassemble the medium inlet and outlet pipes; only the damaged parts need to be removed sequentially from the valve cavity structure. This shortens maintenance time, ensures the sealing of the medium inlet and outlet pipes with the one-way valve, and improves overall reliability.

[0014] This utility model has a reasonable design, simple structure, and good practical application value. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a cross-sectional view of the check valve.

[0018] Figure 2 This shows a sectional view of the valve body.

[0019] Figure 3 This is a schematic diagram of the overall structure of the valve core.

[0020] Figure 4 This shows a cross-sectional view of the valve core.

[0021] Figure 5 This is a schematic diagram of the overall structure of the hollow valve seat.

[0022] Figure 6 This shows a sectional view of the hollow valve seat.

[0023] Figure 7 This shows a cross-sectional view of the step block.

[0024] In the diagram: 1-Valve body, 11-Valve cavity, 101-Bolt mounting threaded hole section, 102-Pressure block mounting stepped hole section, 103-Valve seat mounting stepped hole section, 104-Medium inflow hole section, 105-Medium outflow hole section; 2-Valve core, 201-Limiting boss, 202-Spherical groove, 203-Through hole; 3-Hollow valve seat, 301-Inner conical chamfer, 302-Outer conical chamfer; 4-Spring; 5-Stepped pressure block, 501-Inner cavity, 502-Annular groove, 503-Through hole, 504-Groove, 505-Gap, 506-Threaded hole; 6-Sealing retaining ring; 7-Pressure block bolt; 8-Sealing ring; 9-Steel ball. Detailed Implementation

[0025] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0026] In this description, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joint" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present invention, and not all embodiments.

[0028] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0029] An easy-to-maintain check valve includes a valve body 1, a valve core 2, a hollow valve seat 3, a spring 4, a stepped pressure block 5, a sealing ring 6, a pressure block bolt 7, a sealing ring 8, and a steel ball 9.

[0030] like Figure 2 As shown, the valve body 1 is a cuboid, and a valve cavity 11 is provided inside the valve body 1. From top to bottom, the valve cavity 11 consists of a bolt mounting threaded hole section 101, a pressure block mounting stepped hole section 102, and a valve seat mounting stepped hole section 103. A medium inflow hole section 104 is provided in the lower part of the valve body 1, and the inner end of the medium inflow hole section 104 communicates with the valve seat mounting stepped hole section 103. In this embodiment, the medium inflow hole section 104 is a right-angle hole section; a medium outflow hole section 105 is provided horizontally in the middle of the valve body 1.

[0031] like Figure 3 , Figure 4 As shown, the valve core 2 is a part with a stepped outer diameter and a hollow inner diameter. Multiple through holes 203 are formed in the wall thickness direction of the inner and outer diameters of the valve core 2 to allow the medium flowing from the inner diameter to exit through these holes into the gap 505 formed by the stepped outer diameter. A spherical groove is formed on a section of the inner diameter of the valve core 2 for mounting a steel ball 9. A limiting boss 201 is provided at the upper end of the valve core 2 for limiting the assembly of the spring 4.

[0032] like Figure 5 , Figure 6As shown, the hollow valve seat 3 is a hollow cylindrical part. The upper and lower ports of the inner bore of the hollow valve seat 3 are provided with symmetrical inner conical chamfers 301; the upper and lower outer surfaces of the hollow valve seat 3 are provided with symmetrical outer conical chamfers 302. Both the upper and lower ports of the inner bore of the hollow valve seat 3 are provided with inner conical chamfers 301 for achieving a line seal with the steel ball 9. The outer conical chamfer 302 on the upper outer surface of the hollow valve seat 3 achieves a line seal with the edge of the groove 504. The outer conical chamfer 302 on the lower outer surface of the hollow valve seat 3 achieves a line seal with the inner edge of the valve seat mounting step hole section 103.

[0033] Spring 4 is a standard spring, whose outer diameter is smaller than the inner cavity 501 diameter of the stepped pressure block 5, and whose inner diameter is larger than the outer diameter of the limiting boss 201 of the valve core 2, in order to ensure that spring 4 effectively presses the valve core 2.

[0034] like Figure 7 As shown, the stepped pressure block 5 is a cylindrical part with stepped holes on both its inner and outer diameters. The lower sidewall of the stepped pressure block 5 has an annular groove 502 and one or more through holes 503 communicating with the annular groove 502 in the radial direction, used to allow the medium in the inner cavity 501 to flow out through the multiple through holes 503 into the outer diameter annular groove 502. The port of the inner cavity 501 of the stepped pressure block 5 has a groove 504. The upper end face of the stepped pressure block 5 has a threaded hole 506 and a pin hole for disassembly, serving as process holes, primarily for disassembling the pressure block 5.

[0035] The sealing ring 6 is a ring-shaped part used to ensure that the sealing ring 8 does not suffer from gap extrusion and damage under pressure.

[0036] Bolt 7 is a standard bolt. Sealing ring 8 is a standard UN sealing ring. Steel ball 9 is a standard steel ball.

[0037] like Figure 1 As shown, the hollow valve seat 3 is installed in the valve seat mounting step hole section 103 of the valve body 1, and a steel ball 9 is fitted into the upper inner opening of the hollow valve seat 3. A sealing ring 6 and a sealing ring 8 are fitted onto the step pressure block 5, which is installed in the pressure block mounting step hole section 102 of the valve body 1. The sealing ring 8 and the sealing ring 6 are located between the step surface of the step pressure block 5 and the step surface of the pressure block mounting step hole section 102. A valve core 2 and a spring 4 are fitted into the inner cavity 501 of the step pressure block 5. Under the action of the spring 4, the valve core 2 presses the steel ball 9 against the upper port of the inner hole of the hollow valve seat 3 through its lower spherical groove 202. The annular groove 502 on the lower sidewall of the step pressure block 5 communicates with the inner end of the medium outflow hole section 105. A gap 505 is left between the lower part of the valve core 1 and the inner cavity 501 of the step pressure block 5. A pressure block bolt 7 is fitted into the bolt mounting threaded hole section 101 of the valve body 1 and presses the step pressure block 5 tightly.

[0038] During assembly, the hollow valve seat 3 is placed in the valve seat mounting step hole section 103 of the valve cavity 11 inside the valve body 1. A line seal is achieved by using the outer conical chamfer 302 on the lower outer side of the hollow valve seat 3 and the inner edge of the valve seat mounting step hole section 103. Then, the steel ball 9 is placed in the inner conical chamfer 301 at the upper port of the inner hole of the valve seat 3. Subsequently, the spring 4 and the valve core 2 are placed in the inner cavity 501 of the step pressure block 5. The sealing ring 6 and the sealing ring 8 are placed in sequence on the step surface of the step pressure block 5. The whole assembly formed by the spring 4, the valve core 2, the sealing ring 6, the sealing ring 8 and the step pressure block 5 is placed in the pressure block mounting step hole section 102 of the valve cavity 11 inside the valve body 1. A line seal is achieved by using the groove 504 at the lower end of the step pressure block 5 and the outer conical chamfer 302 at the upper outer side of the valve seat 3. Subsequently, the spring 4, valve core 2, sealing ring 6, sealing ring 8, and pressure block 5 are used to compress the valve seat 3 as a whole, forming a pressure block. Under the action of the spring 4, the valve core 2 presses the steel ball 9 against the upper port of the inner hole of the hollow valve seat 3 through the spherical groove 202 at its lower end, forming a line seal. Finally, the medium inlet pipe and the medium outlet pipe are connected to the stop inlet section 104 and the medium outlet section 405 of the valve body 1, respectively, thus completing the installation of the maintenance-friendly check valve.

[0039] During operation, the medium flows into the hollow valve seat 3 of the valve body 1 through the medium outlet section 104. Under pressure, the steel ball 9 is lifted up, and the valve core 2 compresses the spring 4 as the steel ball 9 moves upward. The medium flows through the gap 505 between the valve core 2 and the inner cavity 501 of the stepped pressure block 5 into the multiple radial through holes 503 of the stepped pressure block 5, then flows into the annular groove 502, and then into the medium outlet section 105.

[0040] During disassembly, simply remove the pressure block bolt 7, and use bolts of the same specification on the stepped pressure block 5 to install them into the threaded holes 506 on the end face of the stepped pressure block 5. Pull out the stepped pressure block 5. Then, because the internal cavity space of the valve body 1 becomes larger, the valve core 2, valve seat 3, spring 4, sealing retaining ring 6, sealing ring 8, and steel ball 9 can be removed and replaced using the corresponding hook-shaped tools. Then, reinstall them according to the installation sequence to complete the maintenance of the check valve. The entire maintenance process does not require disassembly of the medium inlet pipe and the medium outlet pipe, which shortens the maintenance time, ensures the sealing of the medium inlet pipe, the medium outlet pipe, and the check valve, and improves the overall reliability.

[0041] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and all should be covered by the protection scope of the claims.

Claims

1. A maintenance-friendly check valve, characterized in that: It includes a valve body (1), a valve core (2), a hollow valve seat (3), a spring (4), a stepped pressure block (5), a sealing ring (6), a pressure block bolt (7), a sealing ring (8), and a steel ball (9); The valve body (1) is provided with a valve cavity (11). The valve cavity (11) consists of a bolt mounting threaded hole section (101), a pressure block mounting stepped hole section (102), and a valve seat mounting stepped hole section (103) from top to bottom. The lower part of the valve body (1) is provided with a medium inflow hole section (104). The inner end of the medium inflow hole section (104) is connected to the valve seat mounting stepped hole section (103). The middle part of the valve body (1) is provided with a medium outflow hole section (105) horizontally. The hollow valve seat (3) is installed in the valve seat mounting step hole section (103) of the valve body (1), and a steel ball (9) is fitted on the upper inner opening of the hollow valve seat (3). The sealing ring (6) and sealing ring (8) are fitted onto the stepped pressure block (5), and the stepped pressure block (5) is assembled into the pressure block mounting step hole section (102) of the valve body (1). Then the sealing ring (8) and sealing ring (6) are located between the step surface of the stepped pressure block (5) and the step surface of the pressure block mounting step hole section (102). The inner cavity (501) of the stepped pressure block (5) is equipped with a valve core (2) and a spring (4). Under the action of the spring (4), the valve core (2) presses the steel ball (9) against the upper port of the inner hole of the hollow valve seat (3) through the spherical groove (202) at its lower end. The lower side wall of the stepped pressure block (5) is provided with an annular groove (502) and one or more through holes (503) that communicate with the annular groove (502) in the radial direction. The annular groove (502) communicates with the inner end of the medium outflow hole section (105). A gap (505) is left between the lower part of the valve core and the inner cavity (501) of the stepped pressure block (5). The pressure block bolt (7) is assembled into the bolt mounting threaded hole section (101) of the valve body (1) and presses the stepped pressure block (5) tight.

2. The easy-to-maintain check valve according to claim 1, characterized in that: The upper end of the valve core (2) is provided with a limiting boss (201), and the lower end of the spring (4) is assembled on the limiting boss (201).

3. A maintenance-friendly check valve according to claim 1 or 2, characterized in that: The upper port of the inner hole of the hollow valve seat (3) is provided with an inner conical chamfer (301) for achieving a line seal with the steel ball (9). The inner cavity (501) port of the stepped pressure block (5) is provided with a groove (504), the upper outer side of the hollow valve seat (3) is provided with an outer conical chamfer (302) that achieves line sealing with the edge of the groove (504), and the lower outer side of the hollow valve seat (3) is provided with an outer conical chamfer (302) that achieves line sealing with the inner edge of the valve seat mounting stepped hole section (103).

4. The easy-to-maintain check valve according to claim 3, characterized in that: The upper and lower ports of the inner hole of the hollow valve seat (3) are provided with symmetrical inner conical chamfers (301); the upper outer side and lower outer side of the hollow valve seat (3) are provided with symmetrical outer conical chamfers (302).

5. A maintenance-friendly check valve according to claim 1, characterized in that: The medium inflow orifice section (104) is a right-angle orifice section.

6. The easy-to-maintain check valve according to claim 1, characterized in that: The upper end face of the stepped pressure block (5) is provided with a threaded hole (506) for disassembly.

7. A maintenance-friendly check valve according to claim 1, characterized in that: The valve core (2) is hollow and has one or more through holes (203) in the radial direction.

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