A fluorine-lined check valve capable of accurate closing

Abstract

The utility model provides a fluorine lining check valve of accurate closing can, belong to valve technical field, including valve body one, the left side of valve body one is connected with valve body two, the outer wall of one side of valve body one and valve body two each other is installed with flange no.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, specifically relating to a fluoropolymer-lined check valve that can close accurately. Background Technology

[0002] In industrial fluid transport systems, fluoropolymer-lined check valves are widely used in chemical, pharmaceutical and other media transport scenarios due to their corrosion resistance. Their core function is to block the reverse flow of the medium by relying on the check component, while protecting the valve body through the fluoropolymer lining.

[0003] Existing check valves mostly rely on their own weight or simple elastic elements to achieve reset. Due to long-term impact from medium pressure and component wear, the valve plate is prone to misalignment during closure, failing to accurately fit the valve body opening sidewall, resulting in check valve failure and causing reverse leakage of the medium. Therefore, a fluoropolymer-lined check valve that can close accurately is proposed. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] Given the following technical problems in the existing technology: long-term impact of medium pressure and component wear, the valve plate is prone to misalignment during closure, which makes it unable to accurately fit the valve body opening sidewall, resulting in failure of the check function and causing reverse leakage of the medium.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a fluoropolymer-lined check valve that can close accurately, comprising a valve body one, a valve body two connected to the left side of the valve body one, a flange one installed on the outer wall of the side of the valve body one and the valve body two that are close to each other, an inner bushing two installed on the inner side of the valve body one, an inner bushing one installed on the inner side of the valve body two, a plurality of evenly distributed bolts passing through the two flanges one, and a nut threadedly connected to one end of each bolt, a check valve assembly installed on the right side wall of the valve body two, and a guide reset assembly connected to the inner wall of the valve body one.

[0007] By adopting the above technical solution, flange one is fastened with bolts and nuts to achieve a sealed connection between valve body one and valve body two. Inner sleeve one and inner sleeve two are made of fluoropolymer material to protect the valve body. The check valve assembly is used to block the reverse flow of the medium, and the guide reset assembly provides guidance and reset force for the movement of the check valve assembly, ensuring the accurate closing of the check valve and preventing displacement that could lead to medium leakage.

[0008] Furthermore, flange 2 is installed on the outer wall of both valve body 1 and valve body 2 on the side away from each other.

[0009] By adopting the above technical solution, flange two serves as the connection interface between the check valve and the external pipeline. By fastening the external pipeline flange, the check valve and the pipeline system can be seamlessly connected, ensuring the stable flow of the medium between the pipeline and the check valve.

[0010] Furthermore, an outer protruding ring is provided on the side of the inner bushing one and the inner bushing two that are close to each other, and a groove matching the outer protruding ring is provided on the side of the flange one that is close to each other.

[0011] By adopting the above technical solution, the outer convex ring of inner bushing one and inner bushing two is embedded in the groove of flange one. On the one hand, it realizes the precise positioning of the inner bushing inside valve body one and valve body two. On the other hand, the fitting structure of outer convex ring one and groove can enhance the sealing between flange one.

[0012] Furthermore, both inner bushing one and inner bushing two have an outer convex ring two installed on their opposite sides, and the outer convex ring two contacts the outer wall of the corresponding flange two.

[0013] By adopting the above technical solution, the contact between the outer convex ring 2 and the outer wall of flange 2 can ensure sealing when connected to external pipelines, thereby improving the overall sealing performance of the check valve.

[0014] Furthermore, the check valve assembly includes two rotating rods, which are rotatably connected by a rotating sleeve. A valve plate is installed at the bottom of the rotating sleeve. The rotating rods are connected to the right side wall of the valve body, and the valve plate is in contact with the side wall of the opening of the valve body.

[0015] By adopting the above technical solution, when the medium flows in the forward direction, the medium pressure pushes the valve plate, causing the rotating rod to rotate around the rotating sleeve. The valve plate separates from the opening side wall of the valve body and opens the medium flow channel. When the medium is not being transported, the valve plate re-fits the opening side wall of the valve body, blocking the reverse flow of the medium and realizing the core check valve function.

[0016] Furthermore, the guide reset assembly includes a guide shell connected to the inner top wall of the valve body. A cavity is formed in the guide shell, and a sliding plate is slidably connected to the cavity wall. An arc-shaped piece protruding from the guide shell is connected to one side of the sliding plate, and one end of the arc-shaped piece is fixedly connected to the valve plate. An arc-shaped spring is connected to the other side of the sliding plate, and the other end of the arc-shaped spring is fixedly connected to the top inner wall of the guide shell. Grooves are formed on both the front and rear sides of the guide shell. A square threaded joint inserted vertically into the valve body is fixedly connected to the top of the guide shell. A screw that penetrates the valve body and is threadedly connected to the square threaded joint is installed on the outer side of the valve body. Buffer assemblies are provided on both the front and rear sides of the guide shell.

[0017] By adopting the above technical solution, the guide shell can be disassembled using the square threaded joint and screws. When the medium flows in the forward direction and pushes the valve plate to rotate, the valve plate pushes the arc-shaped plate to move. The arc-shaped plate drives the sliding plate to slide along the cavity wall in the cavity, while compressing the arc-shaped spring. When the medium stops flowing, the arc-shaped spring releases its elastic potential energy, which, together with the gravity of the valve plate itself, pushes the sliding plate and the arc-shaped plate to reset. This provides guiding force and auxiliary reset force for the valve plate to reset, preventing the valve plate from becoming misaligned due to long-term use, thus ensuring that the check valve effect is not stable. The slot provides space for the subsequent movement of the buffer assembly, ensuring that the guide reset assembly and the buffer assembly work together.

[0018] Furthermore, the buffer assembly includes a housing installed on the front and rear sides of the guide shell. The housing is hollow and has a through opening in the middle. Contact rods are installed on both the front and rear sides of the sliding plate one. A sliding plate two is provided in the housing and is slidably connected to the housing wall. A buffer spring is provided between the sliding plate two and the bottom of the housing. The through opening matches the contact rod, and the contact rod protrudes from the slot.

[0019] By adopting the above technical solution, during the reciprocating motion of the valve plate, the sliding plate one slides in the guide shell, and the contact rods on its front and rear sides enter the interior of the shell through the slot and the through-hole of the shell, pushing the sliding plate two to slide along the shell wall and compress the buffer spring. The elasticity of the buffer spring can absorb the impact force when the sliding plate one moves, buffer the movement speed of the valve plate end, prevent the valve plate from causing a violent impact when closing due to excessive movement, assist the sliding plate one to reset smoothly, ensure a smoother guide reset process, and improve the closing accuracy and service life of the check valve.

[0020] The beneficial effects of this utility model are as follows: 1. This utility model, through the cooperation of the check valve assembly, rotating rod, rotating sleeve and valve plate, can accurately respond to changes in the flow direction of the medium. When the medium flows in the forward direction, the valve plate opens smoothly. When the flow stops, it closes the valve body opening to block the medium. The guide and reset assembly, through the arc spring, sliding plate and arc plate, provides stable guiding force and auxiliary reset force for the valve plate reset, avoiding the closing misalignment caused by long-term use and ensuring the continuous and reliable check valve effect.

[0021] 2. This utility model utilizes the coordinated operation of the guide reset component and the buffer component. When the valve plate is reset, the contact rod pushes the sliding plate to compress the buffer spring. The spring force can absorb the impact force and buffer the movement speed, preventing the valve plate from experiencing a violent impact due to excessively fast closure. The auxiliary components are reset smoothly, ultimately improving the closing accuracy and overall service life of the check valve.

[0022] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a top view of an embodiment of the present utility model. Figure 3 This is an embodiment of the present utility model. Figure 2 Schematic diagram of the cross-sectional structure at point AA; Figure 4 This is a schematic diagram of the valve plate and guide reset assembly structure according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of the guide reset assembly structure according to an embodiment of the present utility model; Figure 6 This is a schematic diagram of the cross-sectional structure of the guide reset component according to an embodiment of the present utility model; Reference numerals in the attached drawings: 1. Valve body one; 2. Valve body two; 3. Flange one; 4. Inner sleeve one; 5. Inner sleeve two; 6. Bolt; 7. Nut; 81. Rotating sleeve; 82. Rotating rod; 83. Valve plate; 91. Guide shell; 92. Cavity; 93. Sliding plate one; 94. Arc-shaped plate; 95. Arc-shaped spring; 96. Groove; 101. Contact rod; 102. Outer shell; 103. Sliding plate two; 12. Screw. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0027] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0028] Reference Figures 1-6 This utility model embodiment proposes a fluoropolymer-lined check valve capable of accurate closure, comprising a valve body 1, a valve body 2 connected to the left side of the valve body 1, a flange 3 installed on the outer wall of the side of the valve body 1 and the valve body 2 that are close to each other, an inner bushing 5 installed on the inner side of the valve body 1, an inner bushing 4 installed on the inner side of the valve body 2, several evenly distributed bolts 6 passing through the two flanges 3, and a nut 7 threaded to one end of each bolt 6, a check assembly installed on the right side wall of the valve body 2, and a guide reset assembly connected to the inner wall of the valve body 1. The flanges 13 are fastened by the bolts 6 and the nuts 7 to achieve a sealed connection between the valve body 1 and the valve body 2. The inner bushings 4 and 5 are made of fluoropolymer-lined material to protect the valve body. The check assembly is used to block the reverse flow of the medium when not in use, and the guide reset assembly provides guidance and reset force for the movement of the check assembly, ensuring accurate closure of the check valve and preventing displacement that could lead to medium leakage.

[0029] Flange 2 is installed on the outer wall of valve body 1 and valve body 2 on the side away from each other. Flange 2 serves as the connection interface between the check valve and the external pipeline. It is fastened by the external pipeline flange to achieve seamless connection between the check valve and the pipeline system, ensuring stable flow of the medium between the pipeline and the check valve.

[0030] An outer protruding ring is provided on the side of inner bushing 4 and inner bushing 5 that are close to each other. A groove matching the outer protruding ring is provided on the side of flange 3 that is close to each other. The outer protruding rings of inner bushing 4 and inner bushing 5 are embedded in the groove of flange 3. On the one hand, this realizes the precise positioning of the inner bushings inside valve body 1 and valve body 2. On the other hand, the fitting structure of the outer protruding ring and the groove can enhance the sealing between flanges 3.

[0031] Both inner bushing 4 and inner bushing 5 are equipped with external convex rings 2 on their opposite sides. The external convex rings 2 contact the outer wall of the corresponding flange 2. The contact between the external convex rings 2 and the outer wall of the flange 2 can ensure sealing when connected to external pipelines and improve the overall sealing performance of the check valve.

[0032] The check valve assembly includes two rotating rods 82, which are rotatably connected by a rotating sleeve 81. A valve plate 83 is installed at the bottom of the rotating sleeve 81. The rotating rods 82 are connected to the right side wall of the valve body 2, and the valve plate 83 is in contact with the side wall of the opening of the valve body 2. When the medium flows in the forward direction, the medium pressure pushes the valve plate 83, causing the rotating rods 82 to rotate around the rotating sleeve 81. The valve plate 83 disengages from the side wall of the opening of the valve body 2, opening the medium flow channel. When the medium is not being transported, the valve plate 83 re-fits the side wall of the opening of the valve body 2, blocking the reverse flow of the medium and realizing the core check valve function.

[0033] The guide reset assembly includes a guide shell 91 connected to the inner top wall of the valve body 1. A cavity 92 is formed in the guide shell 91. A sliding plate 93 is slidably connected to the cavity wall of the cavity 92. An arc-shaped piece 94 protruding from the guide shell 91 is connected to one side of the sliding plate 93. One end of the arc-shaped piece 94 is fixedly connected to the valve plate 83. One end of an arc-shaped spring 95 is connected to the other side of the sliding plate 93. The other end of the arc-shaped spring 95 is fixedly connected to the top inner wall of the guide shell 91. Grooves 96 are formed on both the front and rear sides of the guide shell 91. A square threaded joint inserted vertically into the valve body 1 is fixedly connected to the top of the guide shell 91. A screw 12, threaded through the valve body 1 and connected to the square threaded joint, is installed on the outer side of the valve body 1. Grooves 96 are formed on both the front and rear sides of the guide shell 91. A buffer assembly is provided. The guide shell 91 can be disassembled by using the square threaded joint and screw 12. When the medium flows in the forward direction and pushes the valve plate 83 to rotate, the valve plate 83 pushes the arc plate 94 to move. The arc plate 94 drives the sliding plate 93 to slide along the cavity wall in the cavity 92, while compressing the arc spring 95. When the medium stops flowing, the arc spring 95 releases its elastic potential energy and pushes the sliding plate 93 and the arc plate 94 to reset. Combined with the gravity of the valve plate 83 itself, it provides guiding force and auxiliary reset force for the reset of the valve plate 83, avoiding the valve plate 83 from closing misalignment due to long-term use, which would cause the check valve effect to be unstable. The slot 96 provides space for the subsequent movement of the buffer assembly, ensuring that the guide reset assembly and the buffer assembly work together.

[0034] The buffer assembly includes a hollow housing 102 installed on the front and rear sides of the guide housing 91. The housing 102 has a through-hole in the middle. Contact rods 101 are installed on both the front and rear sides of the sliding plate 93. A sliding plate 103, slidably connected to the housing wall of the housing 102, is provided inside the housing 102. A buffer spring is installed between the sliding plate 103 and the bottom of the housing 102. The through-hole matches the contact rods 101, which protrude from the slot 96. During the reciprocating motion of the valve plate 83, the sliding plate 93... 3. Sliding within the guide housing 91, the contact rods 101 on its front and rear sides enter the interior of the housing 102 through the slot 96 and the through-hole of the housing 102, pushing the sliding plate 103 to slide along the housing wall of the housing 102 and compressing the buffer spring. The elastic force of the buffer spring can absorb the impact force when the sliding plate 93 moves, buffer the movement speed of the valve plate 83 end, prevent the valve plate 83 from causing a violent impact when closing due to excessive movement, assist the sliding plate 93 to reset smoothly, ensure a smoother guide reset process, and improve the closing accuracy and service life of the check valve.

[0035] The specific implementation method is as follows: In use, the flange 3 on the outside of valve body 1 and valve body 2 is fastened by bolts 6 and nuts 7. Flange 2 serves as the connection interface with the external pipeline, and the connection is achieved by fastening it with the flange of the external pipeline. The guide shell 91 can be disassembled using the square threaded joint and screw 12. When the medium flows in the forward direction and pushes the valve plate 83 to rotate, the valve plate 83 contacts the arc-shaped piece 94 on the outside of the guide shell 91 and pushes it to move. The arc-shaped piece 94 drives the sliding plate 93 in the cavity 92 to slide along the cavity wall, while compressing the arc-shaped spring 95 on the other side of the sliding plate 93. When the medium stops flowing, the arc-shaped spring 95 releases its elastic potential energy, which, together with the gravity of the valve plate 83, pushes the sliding plate 93 and the arc-shaped piece 94 to reset. This provides guiding force and auxiliary reset force for the valve plate 83 to reset, ensuring accurate closure and avoiding... Due to long-term use, valve plate 83 may experience misalignment during closure. To ensure stable check valve performance, during the valve plate 83 reset check valve process, the contact rods 101 on the front and rear sides of sliding plate 93 enter through the through-hole of housing 102, pushing sliding plate 103 in housing 102 and compressing the buffer spring between sliding plate 103 and the bottom of the housing. The elastic force of the buffer spring at the end can absorb the impact force of sliding plate 93's movement, thereby buffering the movement speed of valve plate 83 and preventing it from causing severe impact due to excessively fast closure. At the same time, it assists sliding plate 93 in smooth reset, ultimately improving the closing accuracy and service life of the check valve.

[0036] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A fluoropolymer-lined check valve capable of accurate closure, comprising a valve body (1), characterized in that, Valve body 1 (1) is connected to valve body 2 (2) on the left side. Flange 1 (3) is installed on the outer wall of valve body 1 (1) and valve body 2 (2) on the side close to each other. Inner bushing 2 (5) is installed on the inner side of valve body 1 (1). Inner bushing 1 (4) is installed on the inner side of valve body 2 (2). Several evenly distributed bolts (6) are connected through the two flanges 1 (3). A nut (7) is threaded to one end of each bolt (6). Check valve assembly is installed on the right side wall of valve body 2 (2). Guide reset assembly is connected to the inner wall of valve body 1 (1).

2. The fluoropolymer-lined check valve capable of accurate closure according to claim 1, characterized in that: Flange 2 is installed on the outer wall of valve body 1 (1) and valve body 2 (2) on the side away from each other.

3. A fluoropolymer-lined check valve capable of accurate closure according to claim 2, characterized in that: The inner bushing 1 (4) and the inner bushing 2 (5) are provided with an outer protruding ring 1 on the side close to each other, and the flange 1 (3) is provided with a groove matching the outer protruding ring 1 on the side close to each other.

4. A fluoropolymer-lined check valve capable of accurate closure according to claim 3, characterized in that: Both inner bushing one (4) and inner bushing two (5) are equipped with outer convex ring two on the side away from each other, and the outer convex ring two contacts the outer wall of the corresponding flange two.

5. A fluoropolymer-lined check valve capable of accurate closure according to claim 4, characterized in that: The check valve assembly includes a rotating rod (82), two rotating rods (82) are provided, and a rotating sleeve (81) is rotatably connected between the rotating rods (82). A valve plate (83) is installed at the bottom of the rotating sleeve (81). The rotating rod (82) is connected to the right side wall of the valve body (2), and the valve plate (83) is in contact with the side wall of the opening of the valve body (2).

6. A fluoropolymer-lined check valve capable of accurate closure according to claim 5, characterized in that: The guide reset assembly includes a guide shell (91) connected to the inner top wall of the valve body (1). A cavity (92) is provided in the guide shell (91). A sliding plate (93) is slidably connected in the cavity wall of the cavity (92). An arc-shaped piece (94) protruding from the guide shell (91) is connected to one side of the sliding plate (93). One end of the arc-shaped piece (94) is fixedly connected to the valve plate (83). An arc-shaped spring (94) is connected to the other side of the sliding plate (93). 5) One end of the arc spring (95) is fixedly connected to the top inner wall of the guide shell (91). The guide shell (91) has slots (96) on the front and rear sides. The top of the guide shell (91) is fixedly connected to a square threaded platform that is vertically inserted into the valve body (1). The outer side of the valve body (1) is fitted with a screw (12) that passes through the valve body (1) and is threadedly connected to the square threaded platform. The guide shell (91) is provided with buffer components on both the front and rear sides.

7. A fluoropolymer-lined check valve capable of accurate closure according to claim 6, characterized in that: The buffer assembly includes a housing (102) installed on the front and rear sides of the guide housing (91). The housing (102) is hollow and has a through opening in the middle. Contact rods (101) are installed on both the front and rear sides of the sliding plate (93). A sliding plate (103) is provided in the housing (102) and is slidably connected to the shell wall of the housing (102). A buffer spring is provided between the sliding plate (103) and the bottom of the housing (102). The through opening matches the contact rod (101), and the contact rod (101) protrudes from the slot (96).

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