Self-closing check valve

Abstract

The self-closing check valve comprises a valve rod, a valve body and a spring, the valve body is provided with a first fluid opening, a second fluid opening, a first fluid channel, a second fluid channel and an inner cavity, the inner cavity is provided with an opening, and the first fluid opening is communicated with fluid in the inner cavity; the second fluid opening is in fluid communication with the inner cavity; the valve rod extends into the inner cavity, and the valve rod can move in the inner cavity; the valve rod is sleeved with the spring, a plug is fixedly installed at the front end of the valve rod, and when the spring is in a compressed state, fluid can flow between the first fluid opening and the second fluid opening. When the spring recovers to the original shape, the spring drives the valve rod to ascend, so that the plug at the front end of the valve rod blocks the opening of the inner cavity, and fluid cannot flow between the first fluid opening and the second fluid opening.

Description

Technical Field

[0001] The utility model relates to a valve, in particular to a self-closing check valve. Background Art

[0002] A check valve is a very common valve whose main purpose is to block the continued flow of fluid. Currently, check valves on the market mainly consist of a valve stem and a valve body. The valve body has an inner cavity and at least two fluid openings, both of which are in fluid communication with the inner cavity of the valve body. A blocking plug is provided at the front end of the valve stem. When the blocking plug blocks at least one of the two fluid openings, the fluid is prevented from continuing to flow. However, the check valve (i.e., blocking the flow of fluid) of these check valves on the market still requires manual operation of the valve stem, which is not only time-consuming and labor-intensive, but also has low work efficiency. Summary of the Invention

[0003] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a self-closing check valve.

[0004] To achieve the above-mentioned object, the present invention adopts the following technical solution: a self-closing check valve, comprising: a valve stem, a valve body, and a spring, the valve body having a first fluid opening, a second fluid opening, a first fluid channel, a second fluid channel, and an inner cavity, the inner cavity having an opening, the first fluid channel being in fluid communication with the first fluid opening on one hand, and the first fluid channel being in fluid communication with the inner cavity on the other hand, thereby enabling fluid communication between the first fluid opening and the inner cavity; the second fluid channel being in fluid communication with the inner cavity on one hand, and the second fluid channel being in fluid communication with the second fluid opening on the other hand, thereby enabling fluid communication between the second fluid opening and the inner cavity; the valve stem extending into the inner cavity and being movable within the inner cavity; the spring being sleeved on the valve stem, a plug being fixedly mounted at the front end of the valve stem, wherein when the spring is in a compressed state, fluid can flow between the first fluid opening and the second fluid opening; when the spring returns to its original state, the spring drives the valve stem upward, thereby causing the plug at the front end of the valve stem to block the opening of the inner cavity, thereby preventing fluid from flowing between the first fluid opening and the second fluid opening.

[0005] Furthermore, it also includes a support body, which includes a cylinder, the cylinder has an internal space, and has openings at both ends, the valve stem passes through the internal space of the cylinder of the support body, the cylinder has a limiting surface, the limiting surface is located in the internal space, and the limiting surface constitutes a part of the internal space, and one end of the spring presses against the limiting surface.

[0006] Furthermore, it also includes a limit member, which is fixedly installed with the other end of the valve stem, and the limit member and the plug are fixedly installed at both ends of the valve stem respectively, at least a portion of the limit member extends from the opening of the cylinder into the internal space of the cylinder, and there is a gap between the limit member and the inner wall of the internal space of the cylinder, so that the limit member can move in the internal space; the other end of the spring is pressed against the limit member, and the spring is installed in the internal space of the cylinder of the support body.

[0007] Furthermore, the support body has a through hole, which passes through the support body, and the internal space of the cylinder is part of the through hole; the support body and the valve body are fixedly connected together, and the through hole of the support body is connected to the inner cavity of the valve body; the valve stem passes through the through hole of the support body and extends into the inner cavity of the valve body.

[0008] Furthermore, a lever is included, and a connecting piece is protruding from the limiting piece. The connecting piece and the lever are connected together, and force is applied to the connecting piece through the lever, so that the limiting piece compresses the spring, causing the spring to generate a compression force.

[0009] Furthermore, it also includes a first pivot, a connecting groove is provided on the connecting member, the connecting groove passes through the connecting member, the first pivot is fixedly mounted on the lever, at least a portion of the first pivot is inserted into the connecting groove, so that the first pivot and the connecting member are installed together, thereby compressing the spring through the lever.

[0010] Furthermore, it also includes a fixed rod and a second pivot, one end of the fixed rod is fixedly connected to the lever through the second pivot, and the other end of the fixed rod is fixedly connected to the support body.

[0011] Furthermore, the other end of the fixed rod and the support body are fixedly connected together by welding, and a welding layer is provided between the fixed rod and the support body.

[0012] Furthermore, a magnet is provided between the fixed rod and the support body, and both the fixed rod and the support body are made of iron material. The magnet is adsorbed on the support body, and the fixed rod is adsorbed on the magnet, so that the fixed rod and the support body are fixedly connected.

[0013] The beneficial effects of the present application are as follows: the self-closing check valve provided by the present application has a simple structure and is easy to assemble and disassemble; the lever drives the valve stem to move, and then the limit member compresses the spring, and the plug at the front end of the valve stem leaves the opening of the valve body cavity, thereby allowing fluid to flow between the first fluid opening and the second fluid opening; under the action of the compressed elastic force of the spring, the limit member is lifted by the spring, and then the valve stem moves, driving the plug to block the opening of the valve body cavity, so that no fluid flows between the first fluid opening and the second fluid opening, thereby achieving self-closing; the self-closing process is completed automatically without manual participation, saving time and effort, and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The present invention provides a self-closing check valve.

[0015] Figure 2 for Figure 1 A partially enlarged view of a self-closing check valve is shown.

[0016] Figure 3 for Figure 1 Another partial enlarged view of a self-closing check valve is shown. DETAILED DESCRIPTION

[0017] The present application is further described in detail below by means of specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments are numbered with associated similar elements. In the following embodiments, many detailed descriptions are provided to enable the present application to be better understood. However, those skilled in the art will readily appreciate that some of the features may be omitted in different circumstances, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core portion of the present application being overwhelmed by excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail. They can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0018] In addition, the features, operations, or characteristics described in the specification may be combined in any appropriate manner to form various implementations, and the operational steps involved in each embodiment may be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing a particular embodiment and do not imply a required composition and / or sequence.

[0019] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings).

[0020] Please refer to Figure 1-3 The present application provides a self-closing check valve (hereinafter referred to as "the check valve"), which includes: a valve stem 9, a valve body 1, and a spring 3. The valve body 1 has a first fluid opening 101, a second fluid opening 102, a first fluid channel 103, a second fluid channel 104, and an inner cavity 105. The inner cavity 105 has an opening 1050. The first fluid channel 103 is in fluid communication with the first fluid opening 101 on the one hand, and the first fluid channel 103 is in fluid communication with the inner cavity 105 on the other hand, so that the first fluid opening 101 and the inner cavity 105 are in fluid communication; the second fluid channel 104 is in fluid communication with the inner cavity 105 on the one hand, and the second fluid channel 104 is in fluid communication with the second fluid The opening 102 is fluidically connected, thereby enabling fluid communication between the second fluid opening 102 and the inner cavity 105. The valve stem 9 extends into the inner cavity 5 and is movable within the inner cavity 5. The spring 3 is sleeved on the valve stem 9, and a plug 11 is fixedly mounted at the front end of the valve stem 9. When the spring 3 is in a compressed state, fluid can flow between the first fluid opening 101 and the second fluid opening 102. When the spring 3 returns to its original state, it drives the valve stem 9 upward, thereby causing the plug 11 at the front end of the valve stem 9 to block the opening 1050 of the inner cavity 105, preventing fluid from flowing between the first fluid opening 101 and the second fluid opening 102. Since the return of the spring 3 is achieved by the compressed spring force, there is no human intervention in this process, thereby achieving the function of blocking the opening 1050 of the inner cavity 105 of the self-closing valve body 1 and preventing fluid from flowing between the first fluid opening and the second fluid opening.

[0021] In one embodiment of the present application, the check valve also includes a support body 2, which includes a cylinder 21, the cylinder 21 having an internal space 210 and openings at both ends, the valve stem 9 passes through the internal space 210 of the cylinder 21 of the support body 2, the cylinder 21 has a limiting surface 211, the limiting surface 211 is located in the internal space 210, and the limiting surface 211 constitutes a part of the internal space 210, and one end of the spring 3 presses against the limiting surface 211.

[0022] In one embodiment of the present application, the check valve also includes a limit member 12, which is fixedly mounted on the other end of the valve stem 9, and the limit member 12 and the plug 11 are fixedly mounted on both ends of the valve stem 9, respectively. At least a portion of the limit member 12 extends from the opening of the cylinder 21 into the internal space 210 of the cylinder 21, and there is a gap between the limit member 12 and the inner wall of the internal space 210 of the cylinder 21, so that the limit member 12 can move in the internal space 210; the other end of the spring 3 is pressed against the limit member 12, and the spring 3 is mounted in the internal space 210 of the cylinder 21 of the support body 2.

[0023] In one embodiment of the present application, the support body 2 has a through hole 20, and the through hole 20 passes through the support body 2, and the internal space 210 of the cylinder 21 is part of the through hole 20; the support body 2 and the valve body 1 are fixedly connected together, and the through hole 20 of the support body 2 is connected to the inner cavity 105 of the valve body 1; the valve stem 9 passes through the through hole 20 of the support body 2 and extends into the inner cavity 105 of the valve body 1.

[0024] In one embodiment of the present application, the check valve also includes a lever 4, a connecting member 13 protruding from the limit member 12, the connecting member 13 and the lever 4 are connected together, and a force is applied to the connecting member 13 through the lever 4, so that the limit member 12 compresses the spring 3, causing the spring 3 to generate a compression force.

[0025] In one embodiment of the present application, the check valve also includes a first pivot 6, a connecting groove 130 is provided on the connecting member 13, and the connecting groove 130 passes through the connecting member 13. The first pivot 6 is fixedly mounted on the lever 4, and at least a portion of the first pivot 6 is inserted into the connecting groove 130, so that the first pivot 6 and the connecting member 13 are installed together, thereby compressing the spring 3 through the lever 4.

[0026] In one embodiment of the present application, the check valve further includes a fixed rod 5 and a second pivot 7, one end of the fixed rod 5 is fixedly connected to the lever 4 through the second pivot 7, and the other end of the fixed rod 5 is fixedly connected to the support body 2.

[0027] In one embodiment of the present application, the other end of the fixed rod 5 and the support body 2 are fixedly connected together by welding, and a welding layer 8 is provided between the fixed rod 5 and the support body 2 .

[0028] In one embodiment of the present application, a magnet 8 is provided between the fixed rod 5 and the support body 2, and the fixed rod 5 and the support body 2 are both made of iron material. The magnet 8 is adsorbed on the support body 2, and the fixed rod 5 is adsorbed on the magnet 8, so that the fixed rod 5 and the support body 2 are fixedly connected.

[0029] The self-closing check valve provided in the present application has a simple structure and is easy to assemble and disassemble. The lever drives the valve stem to move, and then the limit member compresses the spring, and the plug at the front end of the valve stem leaves the opening of the valve body cavity, thereby allowing fluid to flow between the first fluid opening and the second fluid opening; under the action of the compressed elastic force of the spring, the limit member is lifted by the spring, and then the valve stem moves, driving the plug to block the opening of the valve body cavity, so that no fluid flows between the first fluid opening and the second fluid opening, thereby achieving self-closing. The self-closing process is completed automatically without manual participation, saving time and effort, and improving work efficiency.

[0030] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention are intended to be included in the scope of protection of the present invention.

Claims

1. A self-closing check valve, characterized in that: include: A valve stem, a valve body, and a spring, wherein the valve body has a first fluid opening, a second fluid opening, a first fluid channel, a second fluid channel, and an inner cavity, wherein the inner cavity has an opening, wherein the first fluid channel is in fluid communication with the first fluid opening on one hand, and the first fluid channel is in fluid communication with the inner cavity on the other hand, so that the first fluid opening and the inner cavity are in fluid communication; the second fluid channel is in fluid communication with the inner cavity on one hand, and the second fluid channel is in fluid communication with the second fluid opening on the other hand, so that the second fluid opening and the inner cavity are in fluid communication; the valve stem extends into the inner cavity and is movable in the inner cavity; the spring is sleeved on the valve stem, and a plug is fixedly mounted on the front end of the valve stem. When the spring is in a compressed state, fluid can flow between the first fluid opening and the second fluid opening; when the spring returns to its original state, the spring drives the valve stem to rise, so that the plug at the front end of the valve stem blocks the opening of the inner cavity, so that fluid cannot flow between the first fluid opening and the second fluid opening.

2. The self-closing check valve according to claim 1, characterized in that: It also includes a support body, which includes a cylinder. The cylinder has an internal space and openings at both ends. The valve stem passes through the internal space of the cylinder of the support body. The cylinder has a limiting surface. The limiting surface is located in the internal space and constitutes a part of the internal space. One end of the spring presses against the limiting surface.

3. The self-closing check valve according to claim 2, characterized in that: It also includes a limit member, which is fixedly mounted on the other end of the valve stem, and the limit member and the plug are fixedly mounted on both ends of the valve stem respectively, at least a portion of the limit member extends from the opening of the cylinder into the internal space of the cylinder, and there is a gap between the limit member and the inner wall of the internal space of the cylinder, so that the limit member can move in the internal space; the other end of the spring is pressed against the limit member, and the spring is mounted in the internal space of the cylinder of the support body.

4. The self-closing check valve according to claim 3, characterized in that: The support body has a through hole, which passes through the support body, and the internal space of the cylinder is part of the through hole; the support body and the valve body are fixedly connected together, and the through hole of the support body is connected to the inner cavity of the valve body; the valve stem passes through the through hole of the support body and extends into the inner cavity of the valve body.

5. The self-closing check valve according to claim 4, characterized in that: It also includes a lever, a connecting piece protruding from the limiting piece, the connecting piece and the lever are connected together, and force is applied to the connecting piece through the lever, so that the limiting piece compresses the spring, causing the spring to generate a compression force.

6. The self-closing check valve according to claim 5, characterized in that: It also includes a first pivot, a connecting groove is provided on the connecting member, the connecting groove passes through the connecting member, the first pivot is fixedly mounted on the lever, at least a portion of the first pivot is inserted into the connecting groove, so that the first pivot and the connecting member are installed together, thereby compressing the spring through the lever.

7. The self-closing check valve according to claim 6, characterized in that: It also includes a fixed rod and a second pivot, one end of the fixed rod is fixedly connected to the lever through the second pivot, and the other end of the fixed rod is fixedly connected to the support body.

8. The self-closing check valve according to claim 7, characterized in that: The other end of the fixed rod and the support body are fixedly connected together by welding, and a welding layer is provided between the fixed rod and the support body.

9. The self-closing check valve according to claim 7, characterized in that: A magnet is provided between the fixed rod and the support body. Both the fixed rod and the support body are made of iron material. The magnet is adsorbed on the support body, and the fixed rod is adsorbed on the magnet, so that the fixed rod and the support body are fixedly connected.

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