Micro-resistance slow-closing check valve

Abstract

The micro-resistance slow-closing check valve comprises a valve body, a pin shaft and a valve clack, the valve body is provided with an inner cavity and at least one fluid port, and the pin shaft is rotationally connected to the inner wall of the inner cavity of the valve body so that the pin shaft can rotate relative to the valve body; the valve clack and the pin shaft are fixedly connected together, and the valve clack moves under the acting force of fluid flowing through the fluid port so as to drive the pin shaft to rotate, so that the valve clack pivots relative to the valve body, and the fluid port is closed or opened by the valve clack. The micro-resistance slow-closing check valve is simple in structure and easy to assemble and disassemble, when the valve clack is opened or closed, the pin shaft can be driven to rotate, the pin shaft and the damping shaft are meshed through the ratchet wheel structure, and the packing pressing plug can extrude the damping shaft, so that the damping shaft and the pin shaft are closer to each other; therefore, the rotation of the pin shaft needs more force, and the slow closing of the valve clack is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the valve body field, concretely relates to a microresistance slow closing check valve. BACKGROUND

[0002] The check valve is applied to many fields, and its structural design is relatively stable and mature. In an existing check valve design, the check valve comprises a valve body and a valve clack, the valve clack is arranged in the valve body, and when a force acts on the valve clack, the valve clack opens or closes a fluid opening of the valve body. However, the valve clack in the prior art opens or closes at a high speed, which may cause the check valve to be opened or closed in a short time or instantaneously, and the prior art cannot meet the needs of some check valves that need to be closed slowly. Therefore, the present application mainly solves this technical problem. SUMMARY

[0003] The utility model discloses a microresistance slow closing check valve that solves the technical problems in the prior art.

[0004] In order to achieve the above-mentioned purpose, the utility model discloses a microresistance slow closing check valve, which comprises a valve body, a pin shaft and a valve clack. The valve body has an inner cavity and at least one fluid port. The pin shaft is rotatably connected to the inner wall of the inner cavity of the valve body, so that the pin shaft can rotate relative to the valve body. The valve clack and the pin shaft are fixedly connected together. The valve clack moves under the action of the force of the fluid flowing through the fluid port, thereby driving the pin shaft to rotate. In this way, the valve clack pivots relative to the valve body, thereby closing or opening the fluid port.

[0005] Further, a damping shaft is rotatably connected to the valve body, so that the damping shaft can rotate relative to the valve body. The pin shaft and the damping shaft are configured such that when the valve clack drives the pin shaft to rotate counterclockwise, the pin shaft does not drive the damping shaft to rotate, thereby opening the fluid port. When the valve clack drives the pin shaft to rotate clockwise, the pin shaft drives the damping shaft to rotate, thereby closing the fluid port.

[0006] Further, the valve body is provided with a first mounting hole and a second mounting hole. The first mounting hole is adapted to the pin shaft, at least a part of the pin shaft is inserted into the first mounting hole, and the pin shaft can rotate in the first mounting hole. The second mounting hole is adapted to the damping shaft, at least a part of the damping shaft is inserted into the second mounting hole, and the damping shaft can rotate in the second mounting hole.

[0007] Further, the pin shaft comprises a pin shaft body, a first ratchet structure is arranged on an end face of the pin shaft body; the damping shaft comprises a damping shaft body, a second ratchet structure is arranged on an end face of the damping shaft body, the pin shaft and the damping shaft abut together, and the first ratchet structure and the second ratchet structure are configured to slide the first ratchet structure on the pin shaft from the second ratchet structure on the damping shaft when the valve disc drives the pin shaft to rotate counterclockwise, so that the valve disc opens the fluid port; when the valve disc drives the pin shaft to rotate clockwise, the first ratchet structure of the pin shaft and the second ratchet structure of the damping shaft are engaged to drive the damping shaft to rotate, so that the valve disc closes the fluid port.

[0008] Further, the pin shaft further comprises a guide rod, the guide rod and the pin shaft body are fixedly connected together, and the guide rod protrudes outward from the end face of the pin shaft body with the first ratchet structure by a preset length; the damping shaft body is provided with a guide hole, the guide hole is recessed inward from the end face of the damping shaft body with the second ratchet structure by a preset depth, and the guide rod and the guide hole are adapted, when the pin shaft and the damping shaft are installed together, the guide rod of the pin shaft is inserted into the guide hole of the damping shaft.

[0009] Further, the damping shaft further comprises a neck portion and a squeezed segment, the neck portion is fixedly connected to the other end face of the damping shaft body, and the squeezed segment is fixedly connected to the neck portion.

[0010] Further, the valve body is further provided with a third mounting hole and a fourth mounting hole, the second mounting hole and the third mounting hole are communicated, the third mounting hole and the fourth mounting hole are communicated, at least a part of the squeezed segment of the damping shaft is arranged in the third mounting hole, at least a part of the squeezed segment of the damping shaft is arranged in the fourth mounting hole, and the neck portion of the damping shaft abuts against the end face of the second mounting hole, thereby preventing the damping shaft from further extending.

[0011] Further, the damping filler, the filler pressing sleeve and the filler pressing plug are further included, the damping filler is fixedly sleeved on the squeezed segment of the damping shaft, and the damping filler abuts against the neck portion; the filler pressing sleeve is fixedly sleeved on the squeezed segment of the damping shaft, and the filler pressing sleeve abuts against the damping filler; the filler pressing plug is configured to extrude the filler pressing sleeve when the filler pressing plug is screwed, so that the pin shaft and the damping shaft are more in contact, thereby reducing the pivoting speed of the valve disc.

[0012] Further, an inner wall of the fourth mounting hole is provided with an internal thread, and the packing pressing plug has an external thread, the packing pressing plug and the fourth mounting hole are threadedly connected, and when the packing pressing plug is screwed, the packing pressing plug is pressed inwardly to the packing pressing sleeve.

[0013] Further, a compression spring is arranged in the first mounting hole, and the compression spring and the other end surface of the pin shaft abut against each other, so that when the pin shaft is slightly moved, the compression spring provides the pin shaft with a force for axial movement.

[0014] The micro-resistance slow-closing check valve provided by the application has the advantages that the structure is simple, easy to assemble and disassemble, the valve clack can drive the pin shaft to rotate when the valve clack is opened or closed, the pin shaft and the damping shaft are engaged through the ratchet structure, the packing pressing plug can press the damping shaft, so that the pin shaft and the damping shaft are closer to each other, and the pin shaft needs to spend more force to rotate, so that the valve clack is slowly closed. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 A structure schematic view of the micro-resistance slow-closing check valve is provided.

[0016] Figure 2 For Figure 1 A sectional view schematic view of the micro-resistance slow-closing check valve along the A-A sectional line is shown.

[0017] Figure 3 A structure schematic view of the pin shaft of the micro-resistance slow-closing check valve is provided.

[0018] Figure 4 A structure schematic view of the damping shaft of the micro-resistance slow-closing check valve is provided. DETAILED DESCRIPTION

[0019] The application will be described in further detail below with specific embodiments and drawings. In different embodiments, similar elements are associated with similar element reference numbers. In the following embodiments, many details are described in order to make the application better understood. However, a person skilled in the art can easily recognize that some features can be omitted in different cases, or can be replaced by other elements, materials or methods. In some cases, some operations related to the application are not shown or described in the specification, in order to avoid the core part of the application being overwhelmed by too much description, and it is not necessary for a person skilled in the art to describe these related operations in detail according to the description in the specification and general technical knowledge in the art.

[0020] In addition, features described in the specification, operations or characteristics can be combined in any appropriate manner to form various embodiments, and the steps involved in each embodiment can be sequentially adjusted or adjusted in a manner that can be easily apparent to those skilled in the art. Therefore, the description and drawings are only for the purpose of clearly describing one embodiment, and do not mean the necessary composition and / or order.

[0021] The serial numbers of the components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any order or technical meaning. The "connection" and "coupling" in this application include direct and indirect connection (coupling) unless otherwise specified.

[0022] Please refer to Figures 1-4 The application provides a micro-resistance slow-closing check valve (hereinafter referred to as "the check valve"), which comprises a valve body 1, a pin shaft 2 and a valve disc 3. The valve body 1 has an inner cavity 100 and at least one fluid port 101. The pin shaft 2 is rotatably connected to the inner wall of the inner cavity 100 of the valve body 1, so that the pin shaft 2 can rotate relative to the valve body 1. The valve disc 3 and the pin shaft 2 are fixedly connected together. The valve disc 3 moves under the action of the fluid flowing through the fluid port 101, thereby driving the pin shaft 2 to rotate, so that the valve disc 3 pivots relative to the valve body 1, thereby closing or opening the fluid port 101.

[0023] In an embodiment of the application, the check valve further comprises a damping shaft 4, which is rotatably connected to the valve body 1, so that the damping shaft 4 can rotate relative to the valve body 1. The pin shaft 2 and the damping shaft 4 are configured such that when the valve disc 3 drives the pin shaft 2 to rotate counterclockwise, the pin shaft 2 does not drive the damping shaft 4 to rotate, so that the valve disc 3 opens the fluid port 101. When the valve disc 3 drives the pin shaft 2 to rotate clockwise, the pin shaft 2 drives the damping shaft 4 to rotate, so that the valve disc 3 closes the fluid port 101.

[0024] In an embodiment of the application, the valve body 1 is provided with a first mounting hole 103 and a second mounting hole 104. The first mounting hole 103 is adapted to the pin shaft 2, at least a part of the pin shaft 2 is inserted into the first mounting hole 103, and the pin shaft 2 can rotate in the first mounting hole 103. The second mounting hole 104 is adapted to the damping shaft 4, at least a part of the damping shaft 4 is inserted into the second mounting hole 104, and the damping shaft 4 can rotate in the second mounting hole 104.

[0025] In an embodiment of the present application, the pin shaft 2 comprises a pin shaft body 21, a first ratchet structure 22 is arranged on an end face of the pin shaft body 21; the damping shaft 4 comprises a damping shaft body 41, a second ratchet structure 44 is arranged on an end face of the damping shaft body 41, the pin shaft 2 and the damping shaft 4 abut together, and the first ratchet structure 22 and the second ratchet structure 44 are configured such that when the valve flap 3 drives the pin shaft 2 to rotate counterclockwise, the first ratchet structure 22 on the pin shaft 2 slides off the second ratchet structure 44 on the damping shaft 4, and the valve flap 3 opens the fluid port 101; when the valve flap 3 drives the pin shaft 2 to rotate clockwise, the first ratchet structure 22 on the pin shaft 2 and the second ratchet structure 44 on the damping shaft 4 engage to drive the damping shaft 4 to rotate, and the valve flap 3 closes the fluid port 101.

[0026] In an embodiment of the present application, the pin shaft 2 further comprises a guide rod 22, the guide rod 22 and the pin shaft body 21 are fixedly connected together, and the guide rod 22 protrudes outward from the end face of the pin shaft body 21 with the first ratchet structure by a preset length; the damping shaft body 41 is provided with a guide hole 410, the guide hole 410 is recessed inward from the end face of the damping shaft body 41 with the second ratchet structure 44 by a preset depth, and the guide rod 22 and the guide hole 410 are adapted, when the pin shaft 2 and the damping shaft 4 are installed together, the guide rod 22 of the pin shaft 2 is inserted into the guide hole 410 of the damping shaft 4.

[0027] In an embodiment of the present application, the damping shaft 4 further comprises a neck portion 42 and a squeezed section 43, the neck portion 42 is fixedly connected to the other end face of the damping shaft body 41, and the squeezed section 43 and the neck portion 42 are fixedly connected.

[0028] In an embodiment of the present application, the valve body 1 is further provided with a third mounting hole 105 and a fourth mounting hole 106, the second mounting hole 104 and the third mounting hole 105 are communicated, the third mounting hole 105 and the fourth mounting hole 106 are communicated, at least a part of the squeezed section 43 of the damping shaft 4 is placed in the third mounting hole 105, at least a part of the squeezed section 43 of the damping shaft 4 is placed in the fourth mounting hole 106, and the neck portion 42 of the damping shaft 4 abuts against the end face of the second mounting hole 104, thereby preventing the damping shaft 4 from further extending.

[0029] In one embodiment of the present application, the check valve further comprises a damping packing 5, a packing pressing sleeve 6 and a packing pressing plug 7, the damping packing 5 is fixedly sleeved on the extruded section 43 of the damping shaft 4 and abuts against the neck 42, the packing pressing sleeve 6 is fixedly sleeved on the extruded section 43 of the damping shaft 4 and abuts against the damping packing 5, the packing pressing plug 7 is configured to extrude the packing pressing sleeve 5 when the packing pressing plug 7 is screwed, so that the damping shaft 4 and the pin shaft 2 are more in contact with each other, thereby reducing the pivoting speed of the valve disc 3.

[0030] In one embodiment of the present application, the inner wall of the fourth mounting hole 106 is provided with internal threads, the packing pressing plug 7 has external threads, and the packing pressing plug 7 and the fourth mounting hole 106 are threadedly connected, so that the packing pressing plug 7 extrudes the packing pressing sleeve 6 inwardly when the packing pressing plug 7 is screwed.

[0031] In one embodiment of the present application, the compression spring 8 is installed in the first mounting hole 103 and abuts against the other end surface of the pin shaft 2, so that the compression spring 8 provides the pin shaft 2 with a force for axial movement when the pin shaft 2 is slightly moved.

[0032] The micro-resistance slow-closing check valve provided by the present application has simple structure, is easy to assemble and disassemble, can drive the pin shaft to rotate when the valve disc is opened or closed, the pin shaft and the damping shaft are engaged through the ratchet structure, the packing pressing plug can extrude the damping shaft, so that the damping shaft and the pin shaft are closer to each other, thereby making the pin shaft need to spend more force to rotate, so as to achieve slow closing of the valve disc.

[0033] The above embodiments are only for illustrating the technical concept and characteristics of the present application, the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A micro-resistive, slow-closing, check valve, characterized by, The valve body, pin shaft, valve disc, the valve body has an inner cavity and at least one fluid port, the pin shaft is rotatably connected to the inner wall of the inner cavity of the valve body, so that the pin shaft can rotate relative to the valve body; the valve disc and the pin shaft are fixedly connected together, the valve disc moves under the action of the fluid flowing through the fluid port, thereby driving the pin shaft to rotate, so that the valve disc pivots relative to the valve body, thereby closing or opening the fluid port. It also includes a damping shaft, which is rotatably connected to the valve body, so that the damping shaft can rotate relative to the valve body; the pin shaft and the damping shaft are configured such that when the valve disc drives the pin shaft to rotate counterclockwise, the pin shaft does not drive the damping shaft to rotate, so that the valve disc opens the fluid port; when the valve disc drives the pin shaft to rotate clockwise, the pin shaft drives the damping shaft to rotate, so that the valve disc closes the fluid port.

2. The micro-resistive, slow-closing, check valve of claim 1, wherein, The valve body is provided with a first mounting hole and a second mounting hole, the first mounting hole and the pin shaft are matched, at least a part of the pin shaft is inserted into the first mounting hole, and the pin shaft can rotate in the first mounting hole; the second mounting hole and the damping shaft are matched, at least a part of the damping shaft is inserted into the second mounting hole, and the damping shaft can rotate in the second mounting hole.

3. The micro-resistive, slow-closing, check valve of claim 2, wherein, The pin shaft includes a pin shaft body, a first ratchet structure is provided on the end face of the pin shaft body; the damping shaft includes a damping shaft body, a second ratchet structure is provided on the end face of the damping shaft body, the pin shaft and the damping shaft abut together, and the first ratchet structure and the second ratchet structure are configured such that when the valve disc drives the pin shaft to rotate counterclockwise, the first ratchet structure on the pin shaft slides off the second ratchet structure on the damping shaft, the valve disc opens the fluid port; when the valve disc drives the pin shaft to rotate clockwise, the first ratchet structure of the pin shaft and the second ratchet structure of the damping shaft are engaged, thereby driving the damping shaft to rotate, and the valve disc closes the fluid port.

4. The micro-resistive, slow-closing, check valve of claim 3, wherein, The pin shaft further includes a guide rod, the guide rod and the pin shaft body are fixedly connected together, and the guide rod protrudes outward from the end face of the pin shaft body with the first ratchet structure by a predetermined length; the damping shaft body is provided with a guide hole, the guide hole is recessed inward from the end face of the damping shaft body with the second ratchet structure by a predetermined depth, and the guide rod and the guide hole are matched, when the pin shaft and the damping shaft are installed together, the guide rod of the pin shaft is inserted into the guide hole of the damping shaft.

5. The micro-resistive, slow-closing, check valve of claim 4, wherein, The damping shaft further includes a neck portion and a squeezed segment, the neck portion is fixedly connected to the other end face of the damping shaft body, and the squeezed segment and the neck portion are fixedly connected.

6. The micro-resistive, slow-closing, check valve of claim 5, wherein, ​ 7. The micro-resistive, slow-closing, check valve of claim 6, wherein, The valve body is further provided with a third mounting hole and a fourth mounting hole, the second mounting hole and the third mounting hole are communicated, the third mounting hole and the fourth mounting hole are communicated, at least a part of the extruded section of the damping shaft is arranged in the third mounting hole, at least a part of the extruded section of the damping shaft is arranged in the fourth mounting hole, and the neck of the damping shaft abuts against the end face of the second mounting hole, thereby preventing the damping shaft from further extending.

8. The micro-resistive, slow-closing, check valve of claim 7, wherein, Further comprising a damping packing, a packing pressing sleeve and a packing pressing plug, the damping packing is fixedly sleeved on the extruded section of the damping shaft and abuts against the neck, the packing pressing sleeve is fixedly sleeved on the extruded section of the damping shaft and abuts against the damping packing, and the packing pressing plug is configured to extrude the packing pressing sleeve when the packing pressing plug is screwed, thereby making the damping shaft and the pin shaft contact together more closely, so as to reduce the pivoting speed of the valve disc.

9. The micro-resistive, slow-closing, check valve of claim 8, wherein, The inner wall of the fourth mounting hole is provided with an internal thread, the packing pressing plug has an external thread, and the packing pressing plug and the fourth mounting hole are threadedly connected, so that the packing pressing plug extrudes the packing pressing sleeve inward when the packing pressing plug is screwed.

10. The micro-resistive, slow-closing, check valve of claim 9, wherein, Further comprising a compression spring, the compression spring is installed in the first mounting hole, and the compression spring and the other end face of the pin shaft abut against each other, so that the compression spring provides the pin shaft with a force for axial movement when the pin shaft is slightly moved. Further comprising a damping packing, a packing pressing sleeve and a packing pressing plug, the damping packing is fixedly sleeved on the extruded section of the damping shaft and abuts against the neck, the packing pressing sleeve is fixedly sleeved on the extruded section of the damping shaft and abuts against the damping packing, and the packing pressing plug is configured to extrude the packing pressing sleeve when the packing pressing plug is screwed, thereby making the damping shaft and the pin shaft contact together more closely, so as to reduce the pivoting speed of the valve disc. The inner wall of the fourth mounting hole is provided with an internal thread, the packing pressing plug has an external thread, and the packing pressing plug and the fourth mounting hole are threadedly connected, so that the packing pressing plug extrudes the packing pressing sleeve inward when the packing pressing plug is screwed. Further comprising a compression spring, the compression spring is installed in the first mounting hole, and the compression spring and the other end face of the pin shaft abut against each other, so that the compression spring provides the pin shaft with a force for axial movement when the pin shaft is slightly moved.

Images