Low-pressure automatic pressure relief structure of ball valve
By setting the valve seat ring and valve core gap and compression spring in the ball valve, automatic pressure relief under low pressure is achieved, which solves the problem that existing ball valves cannot automatically relieve pressure. The structure is simple and easy to assemble.
Patent Information
- Application Number
- CN202423060132.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-12-12
AI Technical Summary
Existing ball valves cannot achieve automatic pressure relief at low pressure.
A low-pressure automatic pressure relief structure for a ball valve was designed. By setting a gap between the valve seat ring and the valve core, and utilizing the cooperation of a compression spring and a sealing ring, the valve seat ring can automatically open and relieve pressure under the push of the fluid medium, and restore the seal under the action of the compression spring.
It achieves automatic pressure relief under low pressure, has a simple structure, is easy to assemble and disassemble, and effectively solves the problem that ball valves in the prior art cannot automatically relieve pressure.
Smart Images
Figure CN223460016U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the valve body field, concretely relates to a low pressure automatic pressure relief structure of ball valve. BACKGROUND
[0002] Ball valves are used in many fields. At present, most of the ball valves used on the market include a valve body, a valve stem and a valve core (ball), the valve stem and the valve core are connected, the valve core is arranged in the inner cavity of the valve body, the valve stem is arranged outside the valve body, the valve stem drives the valve core to rotate to open the fluid passage and close the fluid passage. In some special fields or environments, automatic pressure relief ball valves are required, preferably low pressure triggered automatic pressure relief. However, the ball valves on the market cannot achieve low pressure automatic pressure relief. SUMMARY
[0003] The utility model discloses a low pressure automatic pressure relief structure of ball valve to solve the shortcoming of prior art.
[0004] In order to achieve the above object, the utility model discloses a low pressure automatic pressure relief structure of ball valve, which comprises a valve cover, a valve seat ring and a valve core. The valve cover constitutes part of the valve seat, the valve seat has an inner cavity, and the valve cover surrounds part of the inner cavity. The valve seat ring and the valve core are arranged in the inner cavity. There is a gap between the valve seat ring and the valve core. When the valve seat ring is not pushed by fluid medium or the pushing force of fluid medium does not reach the preset value, the gap between the valve seat ring and the valve core is closed, so that fluid medium cannot flow through the gap between the valve seat ring and the valve core. When the valve seat ring is moved by the pushing force of fluid medium, the gap between the valve seat ring and the valve core is opened, so that fluid medium flows through the gap, thereby achieving the purpose of pressure relief.
[0005] Further, a first mounting hole is arranged on the valve cover, part of a compression spring is installed into the first mounting hole, another part of the compression spring extends out of the first mounting hole, the first mounting hole has an inner wall, wherein the bottom end inner wall constitutes a static pressure bearing surface, one end of the compression spring abuts against the static pressure bearing surface, and the other end of the compression spring abuts against the valve seat ring. When the valve seat ring is moved by the pushing force of fluid medium, the valve seat ring pushes the compression spring to be compressed, so that the compression spring generates elastic force.
[0006] Further, the first sealing ring and the second sealing ring are sleeved on the valve seat ring, and the first sealing ring and the second sealing ring are located between the valve cover and the valve seat ring, so that the first sealing ring and the second sealing ring seal the gap between the valve cover and the valve seat ring.
[0007] Further, the first sealing ring and the second sealing ring are sleeved on the valve seat ring, and the first sealing ring and the second sealing ring are located between the valve cover and the valve seat ring, so that the first sealing ring and the second sealing ring seal the gap between the valve cover and the valve seat ring.
[0008] Further, the first sealing ring and the second sealing ring are sleeved on the valve seat ring, and the first sealing ring and the second sealing ring are located between the valve cover and the valve seat ring, so that the first sealing ring and the second sealing ring seal the gap between the valve cover and the valve seat ring.
[0009] Further, the size of the first sealing pair is smaller than the size of the second sealing pair.
[0010] Further, the valve seat ring and the valve cover have a cavity therebetween, and the space size of the cavity is variable; when the valve seat ring moves axially under the pushing of the fluid medium, and the gap between the valve seat ring and the valve core increases, the cavity decreases; when the valve seat ring moves axially under the elastic force of the compression spring, and the gap between the valve seat ring and the valve core decreases, the cavity increases.
[0011] Further, the valve seat ring and the valve cover have a cavity therebetween, and the space size of the cavity is variable; when the valve seat ring moves axially under the pushing of the fluid medium, and the gap between the valve seat ring and the valve core increases, the cavity decreases; when the valve seat ring moves axially under the elastic force of the compression spring, and the gap between the valve seat ring and the valve core decreases, the cavity increases.
[0012] Further, the valve seat ring and the valve cover have a cavity therebetween, and the space size of the cavity is variable; when the valve seat ring moves axially under the pushing of the fluid medium, and the gap between the valve seat ring and the valve core increases, the cavity decreases; when the valve seat ring moves axially under the elastic force of the compression spring, and the gap between the valve seat ring and the valve core decreases, the cavity increases.
[0013] Further, the valve seat ring and the valve cover have a cavity therebetween, and the space size of the cavity is variable; when the valve seat ring moves axially under the pushing of the fluid medium, and the gap between the valve seat ring and the valve core increases, the cavity decreases; when the valve seat ring moves axially under the elastic force of the compression spring, and the gap between the valve seat ring and the valve core decreases, the cavity increases.
[0014] The ball valve low-pressure automatic pressure relief structure provided by the application has the advantages that the structure is simple, easy to assemble and disassemble, when fluid medium pushes the valve seat ring to move axially and the gap between the valve seat ring and the valve core becomes larger, the fluid medium flows through the gap, so that the purpose of automatic pressure relief is achieved, when the automatic pressure relief reaches a certain degree, the elastic force of the compression spring compressed by the valve seat ring pushes the valve seat ring to move axially in the opposite direction, so that the gap between the valve seat ring and the valve core becomes smaller, and the fluid medium cannot pass through the gap. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 A ball valve low-pressure automatic pressure relief structure provided by the application has the advantages that the structure is simple, easy to assemble and disassemble, when fluid medium pushes the valve seat ring to move axially and the gap between the valve seat ring and the valve core becomes larger, the fluid medium flows through the gap, so that the purpose of automatic pressure relief is achieved, when the automatic pressure relief reaches a certain degree, the elastic force of the compression spring compressed by the valve seat ring pushes the valve seat ring to move axially in the opposite direction, so that the gap between the valve seat ring and the valve core becomes smaller, and the fluid medium cannot pass through the gap.
[0016] Figure 2 For Figure 1 An enlarged view of the ball valve low-pressure automatic pressure relief structure shown in FIG. 1 at A.
[0017] Figure 3 A ball valve low-pressure automatic pressure relief structure provided by the application has the advantages that the structure is simple, easy to assemble and disassemble, when fluid medium pushes the valve seat ring to move axially and the gap between the valve seat ring and the valve core becomes larger, the fluid medium flows through the gap, so that the purpose of automatic pressure relief is achieved, when the automatic pressure relief reaches a certain degree, the elastic force of the compression spring compressed by the valve seat ring pushes the valve seat ring to move axially in the opposite direction, so that the gap between the valve seat ring and the valve core becomes smaller, and the fluid medium cannot pass through the gap.
[0018] Figure 4 A ball valve low-pressure automatic pressure relief structure provided by the application has the advantages that the structure is simple, easy to assemble and disassemble, when fluid medium pushes the valve seat ring to move axially and the gap between the valve seat ring and the valve core becomes larger, the fluid medium flows through the gap, so that the purpose of automatic pressure relief is achieved, when the automatic pressure relief reaches a certain degree, the elastic force of the compression spring compressed by the valve seat ring pushes the valve seat ring to move axially in the opposite direction, so that the gap between the valve seat ring and the valve core becomes smaller, and the fluid medium cannot pass through the gap. DETAILED DESCRIPTION
[0019] The application will be further described in detail below with reference to the specific embodiments and the accompanying drawings. In different embodiments, similar elements are denoted by similar reference numerals. In the following embodiments, many details are described in order to make the application better understood. However, those skilled in the art can easily recognize that some features can be omitted or replaced by other elements, materials or methods in different cases. In some cases, some operations related to the application are not shown or described in the specification in order to avoid the core of the application being overwhelmed by too much description, and it is not necessary to describe these operations in detail for those skilled in the art, who can fully understand the operations according to the description in the specification and the general technical knowledge in the art.
[0020] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments, and the operation steps involved in each embodiment can be sequentially adjusted or modified in a manner that is obvious to those skilled in the art. Therefore, the specification and the drawings are only intended to clearly describe one embodiment, and do not mean that the components and / or order are necessary.
[0021] The serial numbers of components in this document, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "coupling" in this application, unless otherwise specified, include direct and indirect connections (couplings).
[0022] Please refer to Figures 1-4 The application provides a low-pressure automatic pressure relief structure of a ball valve (hereinafter referred to as "the pressure relief structure"), which comprises a valve cover 1, a valve seat ring 4, and a valve core 2. The valve cover 1 constitutes part of the valve seat, the valve seat has an inner cavity 100, and the valve cover 1 surrounds part of the inner cavity 100. The valve seat ring 4 and the valve core 2 are arranged in the inner cavity 100. There is a gap 12 between the valve seat ring 4 and the valve core 2. When the valve seat ring 4 is not pushed by the fluid medium or the pushing force of the fluid medium does not reach a preset value, the gap 12 between the valve seat ring 4 and the valve core 2 is closed, so that the fluid medium cannot flow through the gap 12 between the valve seat ring 4 and the valve core 2. When the valve seat ring 4 is moved by the pushing force of the fluid medium, the gap 12 between the valve seat ring 4 and the valve core 2 is opened, so that the fluid medium flows through the gap 12, thereby achieving the purpose of pressure relief.
[0023] In an embodiment of the application, a first mounting hole 101 is arranged on the valve cover 1, a part of a compression spring 3 is mounted into the first mounting hole 101, and the other part of the compression spring 3 protrudes from the first mounting hole 101. The first mounting hole 101 has an inner wall, wherein the bottom end inner wall constitutes a static pressure bearing surface 102, and one end of the compression spring 3 abuts against the static pressure bearing surface 102. The other end of the compression spring 3 abuts against the valve seat ring 4. When the valve seat ring 4 is moved by the pushing force of the fluid medium, the valve seat ring 4 pushes the compression spring 3 to be compressed, so that an elastic force is generated in the compression spring 3.
[0024] In an embodiment of the application, the pressure relief structure further comprises a first sealing ring 5 and a second sealing ring 6. The first sealing ring 5 and the second sealing ring 6 are sleeved on the valve seat ring 4, and the first sealing ring 5 and the second sealing ring 6 are located between the valve cover 1 and the valve seat ring 4. In this way, the first sealing ring 5 and the second sealing ring 6 are used to seal the gap between the valve cover 1 and the valve seat ring 4.
[0025] In an embodiment of the application, a first sealing ring mounting groove 41 and a second sealing ring mounting groove 42 are arranged on the valve seat ring 4. The first sealing ring 5 is mounted into the first sealing ring mounting groove 41, and the second sealing ring 6 is mounted into the second sealing ring mounting groove 42.
[0026] In one embodiment of the present application, the pressure relief structure further comprises a first sealing pair 9 and a second sealing pair 10, the first sealing pair 9 comprising a first sealing ring 5, a first sealing ring mounting groove 41, and a surface of the bonnet 1 in contact with the first sealing ring 5; the second sealing pair 10 comprising a second sealing ring 6, a second sealing ring mounting groove 42, and a surface of the bonnet 1 in contact with the second sealing ring 6.
[0027] In one embodiment of the present application, the size of the first sealing pair 9 is smaller than the size of the second sealing pair 10. Here, the size refers to the diameter and cross-sectional area of the first sealing ring 5 being smaller than the diameter and cross-sectional area of the second sealing ring 6.
[0028] In one embodiment of the present application, there is a cavity 7 between the valve seat ring 4 and the bonnet 1, the size of the cavity 7 being variable; when the valve seat ring 4 moves axially under the push of the fluid medium, and the gap 12 between the valve seat ring 4 and the valve core 2 increases, the cavity 7 decreases; when the valve seat ring 4 moves axially under the elastic force of the compression spring 3, and the gap 12 between the valve seat ring 4 and the valve core 2 decreases, the cavity 7 increases.
[0029] In one embodiment of the present application, the pressure relief structure further comprises a one-way valve 11, the one-way valve 11 being in fluid communication with the cavity 7; when the valve seat ring 4 moves axially under the push of the fluid medium, and the gap 12 between the valve seat ring 4 and the valve core 2 increases, the cavity 7 is squeezed to decrease, and the air in the cavity 7 is discharged from the one-way valve 11. It should be noted that the one-way valve 11 in the present application belongs to the prior art, and the currently marketed one-way valves that can only realize the function of one-way fluid conduction meet the requirements of the one-way valve 11 in the present application.
[0030] In one embodiment of the present application, a second mounting hole 103 is further provided on the bonnet 1, at least a part of the one-way valve 11 is mounted into the second mounting hole 103, the second mounting hole 103 is in fluid communication with the cavity 7, so that the air in the cavity 7 can flow into the second mounting hole 103 and be discharged from the one-way valve 11.
[0031] In one embodiment of the present application, a fluid communication hole 104 is further provided on the bonnet 1, the fluid communication hole 104 fluidly connects the cavity 7 and the second mounting hole 103.
[0032] The low-pressure automatic pressure relief structure of the ball valve is simple in structure, easy to assemble and disassemble, when fluid medium pushes the valve seat ring to move axially, and the gap between the valve seat ring and the valve core becomes larger, the fluid medium flows through the gap, so as to achieve the purpose of automatic pressure relief; when the automatic pressure relief reaches a certain degree, the elastic force of the compression spring compressed by the valve seat ring pushes the valve seat ring to move axially in the opposite direction, so that the gap between the valve seat ring and the valve core becomes smaller, until the fluid medium cannot pass through the gap. The application well solves the technical problem that the ball valve in the prior art cannot realize automatic pressure relief.
[0033] The above examples are only for illustrating the technical concept and characteristics of the application, and the purpose is to enable those skilled in the art to understand the content of the application and implement it, and cannot limit the protection scope of the application. Any equivalent changes or modifications made according to the spirit and essence of the application shall be covered within the protection scope of the application.
Claims
1. A low pressure automatic pressure relief structure of a ball valve, characterized by, The valve cover, the valve seat ring, and the valve core, the valve cover constitutes a part of the valve seat, the valve seat has an inner cavity, the valve cover surrounds a part of the inner cavity, the valve seat ring and the valve core are arranged in the inner cavity, there is a gap between the valve seat ring and the valve core, when the valve seat ring is not pushed by the fluid medium or the pushing force of the fluid medium does not reach a preset value, the gap between the valve seat ring and the valve core is closed, so that the fluid medium cannot flow through the gap between the valve seat ring and the valve core, when the valve seat ring is moved under the pushing force of the fluid medium, the gap between the valve seat ring and the valve core is opened, so that the fluid medium flows through the gap, thereby achieving the purpose of pressure relief. A first mounting hole is arranged on the valve cover, a part of the compression spring is mounted into the first mounting hole, another part of the compression spring protrudes from the first mounting hole, the first mounting hole has an inner wall, wherein the bottom end inner wall constitutes a static pressure bearing surface, one end of the compression spring abuts against the static pressure bearing surface, the other end of the compression spring abuts against the valve seat ring, when the valve seat ring is moved under the pushing of the fluid medium, the valve seat ring pushes the compression spring to be compressed, so that the elastic force is generated in the compression spring.
2. The low pressure pressure relief structure of a ball valve according to claim 1, characterized by, Further comprising a first sealing ring and a second sealing ring, the first sealing ring and the second sealing ring are sleeved on the valve seat ring, and the first sealing ring and the second sealing ring are located between the valve cover and the valve seat ring, so that the first sealing ring and the second sealing ring are used to seal the gap between the valve cover and the valve seat ring.
3. The low pressure pressure relief structure of a ball valve according to claim 2, characterized by, A first sealing ring mounting groove and a second sealing ring mounting groove are arranged on the valve seat ring, the first sealing ring is mounted into the first sealing ring mounting groove, and the second sealing ring is mounted into the second sealing ring mounting groove.
4. The low pressure pressure relief structure of a ball valve according to claim 3, characterized by, Further comprising a first sealing pair and a second sealing pair, the first sealing pair comprises a first sealing ring, a first sealing ring mounting groove, and a surface of the valve cover in contact with the first sealing ring, and the second sealing pair comprises a second sealing ring, a second sealing ring mounting groove, and a surface of the valve cover in contact with the second sealing ring.
5. The low pressure pressure relief structure of a ball valve according to claim 4, characterized by, The size of the first sealing pair is smaller than the size of the second sealing pair.
6. The low pressure pressure relief structure of a ball valve according to claim 5, wherein There is a cavity between the valve seat ring and the valve cover, the space size of the cavity is variable, when the valve seat ring moves axially under the pushing of the fluid medium, and the gap between the valve seat ring and the valve core increases, the cavity decreases, when the valve seat ring moves axially under the elastic force of the compression spring, and the gap between the valve seat ring and the valve core decreases, the cavity increases.
7. The low pressure pressure relief structure of a ball valve according to claim 6, wherein Further comprising a one-way valve, the one-way valve is in fluid communication with the cavity, when the valve seat ring moves axially under the pushing of the fluid medium, and the gap between the valve seat ring and the valve core increases, the cavity is squeezed to be smaller, and the air in the cavity is discharged from the one-way valve.
8. The low pressure pressure relief structure of a ball valve according to claim 7, characterized by, 9. The low pressure pressure relief structure of a ball valve according to claim 8, wherein A second mounting hole is also provided in the valve cover, at least a portion of the check valve is mounted into the second mounting hole, the second mounting hole and the cavity are in fluid communication, so that air in the cavity can flow into the second mounting hole and be discharged from the check valve.
10. The low pressure pressure relief structure of a ball valve according to claim 9, wherein A fluid communication hole is also provided in the valve cover, the fluid communication hole fluidly communicates the cavity and the second mounting hole.