Gate valve structure capable of reducing assembling procedures and reducing sealing leakage points

Abstract

The utility model discloses a gate valve structure capable of reducing assembly procedures and sealing leakage points. The gate valve structure comprises a valve body, a valve rod, a valve cover, a gate plate and a hand wheel. The valve rod and the valve cover are designed to be of an integrated structure, a positioning buckle structure is arranged between the valve cover and the valve body, the valve cover and the valve body are positioned through the positioning buckle structure, and the valve cover can rotate relative to the valve body; and a plurality of sealing rings are arranged between the valve cover and the valve body. According to the utility model, the valve rod and the valve cover are designed into an integrated structure, a corresponding mounting and connecting structure is arranged, the valve rod and the valve cover rotate integrally during use through a positioning buckle structure, and as the valve rod and the valve cover are designed into an integrated structure, a sealing structure does not need to be mounted between the valve rod and the valve cover, sealing leakage points are reduced, and the problem of troublesome replacement operation does not need to be considered; the pressing assembly is simple and convenient, assembly procedures are greatly reduced, assembly is convenient, and efficiency is high.

Description

Technical Field

[0001] This utility model belongs to the field of gate valve technology, specifically relating to a gate valve structure that reduces assembly steps and minimizes sealing leaks. Background Technology

[0002] Gate valves are one type of valve among many. Due to their unique structure, they have low flow resistance, are durable, and easy to use, making them widely used in industries such as water supply, sewage treatment, construction, petroleum, chemical, food, and pharmaceuticals. In a gate valve, the movement direction of the gate, the opening and closing element, is perpendicular to the fluid direction. During opening and closing, the handwheel and valve stem can move relative to each other. Turning the handwheel drives the valve stem to rotate, which in turn causes the bottom valve plate to rise and fall.

[0003] In existing gate valve designs, the valve stem and bonnet are separate units. The valve stem passes through a central hole in the bonnet and connects to the gate. The bonnet positions the valve stem for installation and rotation. To ensure the gate valve's sealing performance, sealing packing or a sealing structure is installed between the valve stem and bonnet. This results in numerous potential leaks, and the sealing packing or structure is prone to wear and tear, requiring frequent replacement. Currently, replacing the sealing packing requires a shut-off operation, which is cumbersome. The replacement process necessitates disassembling the handwheel, valve stem, and bonnet, making the process inconvenient. Furthermore, the assembly tools for the bonnet and valve stem are also inconvenient. Therefore, improvements are needed to address the shortcomings of the existing structural design. Summary of the Invention

[0004] The purpose of this invention is to solve the problems mentioned in the background art and to provide a gate valve structure that reduces assembly steps and lowers sealing leakage points.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: a gate valve structure that reduces assembly steps and lowers sealing leakage points, including a valve body, a valve stem, a valve cover, a gate, and a handwheel; the valve stem and the valve cover are designed as an integral structure, and a positioning buckle structure is provided between the valve cover and the valve body, the valve cover is positioned with the valve body through the positioning buckle structure, and can rotate relative to the valve body; multiple sealing rings are provided between the valve cover and the valve body.

[0006] In the above-mentioned gate valve structure that reduces assembly steps and lowers sealing leakage points, the valve body is provided with a connection hole, and the positioning buckle structure is provided with an inner mounting annular groove on the valve cover, an outer mounting annular groove in the connection hole, and an open retaining ring that matches the inner mounting annular groove and the outer mounting annular groove; a push-up inclined surface is provided on one side of the inner mounting annular groove on the valve cover, and multiple sealing rings on the valve cover form a seal with the connection hole of the valve body.

[0007] In the gate valve structure described above, which reduces assembly steps and minimizes sealing leaks, the inner diameter of the open retaining ring is smaller than the outer diameter of the inner mounting ring groove and its outer diameter is larger than the inner diameter of the outer mounting ring groove under normal stress conditions.

[0008] In the gate valve structure described above, which reduces assembly steps and minimizes sealing leaks, an annular assembly ramp is provided at the opening of the connection hole.

[0009] In the gate valve structure described above, which reduces assembly steps and lowers sealing leakage points, the valve cover is provided with a positioning boss that can abut against the valve body.

[0010] In the gate valve structure described above, which reduces assembly steps and minimizes sealing leaks, the end of the valve stem is fixedly connected to the handwheel using a nut.

[0011] In the gate valve structure described above, which reduces assembly steps and minimizes sealing leaks, the valve cover is provided with multiple sealing mounting grooves, and a sealing ring is installed in the sealing mounting groove between the sealing mounting groove and the connecting hole of the valve body to form a seal.

[0012] In the gate valve structure described above, which reduces assembly steps and lowers sealing leakage points, the valve cover and the connecting hole are respectively provided with corresponding mounting parts and sealing parts. The mounting parts on the valve cover and the connecting hole are matched and rotated to position. The inner mounting annular groove and the outer mounting annular groove are respectively provided on the mounting parts of the valve cover and the connecting hole. The sealing mounting groove is provided on the sealing part of the valve cover and forms a seal with the sealing part of the connecting hole.

[0013] In the gate valve structure described above, which reduces assembly steps and lowers sealing leakage points, a push-off inclined surface is also provided on one side of the valve cover where the inner annular groove is installed.

[0014] The advantages of this utility model:

[0015] This utility model integrates the valve stem and valve cover into a single structure and incorporates a corresponding installation and connection structure. The valve stem and valve cover rotate as a unit during use via a positioning buckle structure. Since the valve stem and valve cover are integrated, there is no need to install a sealing structure between them, reducing the number of sealing leaks and eliminating the hassle of replacement operations.

[0016] In this invention, after the open retaining ring is installed into the connecting hole of the valve body using a tool, when assembling the valve stem and valve cover, it is only necessary to press it against the connecting hole to make the open retaining ring and valve cover positioned and connected. Compared with the existing structural design, the assembly process is greatly reduced, and the assembly is convenient and efficient. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention;

[0018] Figure 2This is an exploded view of the present invention;

[0019] Figure 3 This is a cross-sectional view of the present invention;

[0020] Figure 4 yes Figure 3 Enlarged view of section A in the middle;

[0021] Figure 5 This is a three-dimensional cross-sectional view of the valve body in this utility model. Detailed Implementation

[0022] The present invention will be further described in conjunction with the accompanying drawings.

[0023] Please see Figures 1 to 5 This utility model provides a gate valve structure that reduces assembly steps and lowers sealing leakage points, including a valve body 1, a valve stem 2, a valve cover 3, a gate plate 4, and a handwheel 5; the valve stem 2 and the valve cover 3 are designed as an integral structure, and the end of the valve stem 2 is fixedly connected to the handwheel 5 by a nut 14. In use, rotating the handwheel drives the valve stem and valve cover to rotate relative to the valve body.

[0024] A positioning buckle structure is provided between the valve cover 3 and the valve body 1. The valve body 1 is provided with a connecting hole 7. The positioning buckle structure consists of an inner mounting annular groove 8 on the valve cover 3, an outer mounting annular groove 9 in the connecting hole 7, and an open retaining ring 10 that matches the inner mounting annular groove 8 and the outer mounting annular groove 9. A push-up inclined surface 11 is provided on one side of the inner mounting annular groove 8 on the valve cover 3. The valve cover 3 and the connecting hole 7 are respectively provided with corresponding mounting parts 16 and sealing parts 17. The mounting parts 16 on the valve cover 3 and the connecting hole 7 are matched and rotated for positioning. The inner mounting annular groove 8 and the outer mounting annular groove 9 are respectively provided on the mounting parts 16 of the valve cover 3 and the connecting hole 7. The sealing mounting groove 15 is provided on the sealing part 17 of the valve cover 3 and forms a seal with the sealing part of the connecting hole 7.

[0025] During assembly, a special assembly tool is used to clamp the constricted end of the open retaining ring 10 and place it into the outer mounting ring groove 9 of the connecting hole. Since the outer diameter of the open retaining ring 10 is larger than the inner diameter of the outer mounting ring groove 9 under normal unloaded conditions, the open retaining ring 10 forms a positioning abutment with the outer mounting ring groove 9 when it is placed in the outer mounting ring groove 9 without being under load. Then, when assembling the valve stem and valve cover, align the connecting hole on the valve body and then apply force to press the valve stem and valve cover. The push-up inclined surface 11 on the valve cover 3 will open the open retaining ring 10 until the inner mounting ring groove 8 on the valve cover corresponds to the open retaining ring 10. The constricted end of the open retaining ring 10 is in the normal state with the inner mounting ring groove 8. At this time, the open retaining ring 10 abuts against the valve cover 3 and the valve body 1, thereby completing the installation connection of the valve cover and valve stem. It is very convenient. The valve cover 3 forms a positioning with the valve body 1 through the positioning buckle structure and can rotate relative to the valve body 1.

[0026] Multiple sealing rings 6 are provided between the valve cover 3 and the valve body 1. The multiple sealing rings 6 form a seal with the connecting hole 7 of the valve body 1. The valve cover 3 is provided with multiple sealing mounting grooves 15. The sealing rings 6 are installed in the sealing mounting grooves 15 and form a seal with the connecting hole 7 of the valve body 1. The sealing rings are installed at the same time when the valve cover is assembled.

[0027] Furthermore, to facilitate the assembly of the open retaining ring 10, an annular assembly ramp 12 is provided at the opening of the connecting hole 7.

[0028] Furthermore, the valve cover 3 is provided with a positioning boss 13 that can abut against the valve body 1. The mounting parts 16 on both the valve cover 3 and the connecting hole 7 are matched and rotated to position. With the abutment and positioning of the positioning boss 13, the rotation of the valve cover is positioned and prevented from shaking.

[0029] Furthermore, a push-off ramp 18 is provided on one side of the valve cover 3 and the inner mounting ring groove 8. When it is necessary to disassemble the valve cover, the opening retaining ring 10 can be opened by pulling through the push-off ramp 18, which facilitates disassembly.

[0030] The above provides a detailed description of a gate valve structure that reduces assembly steps and minimizes sealing leaks, as provided by the embodiments of this utility model. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the technical solutions disclosed in this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A gate valve structure that reduces assembly steps and minimizes sealing leaks, comprising a valve body (1), a valve stem (2), a valve cover (3), a gate (4), and a handwheel (5); characterized in that: The valve stem (2) and valve cover (3) are designed as an integral structure. A positioning buckle structure is provided between the valve cover (3) and the valve body (1). The valve cover (3) is positioned with the valve body (1) through the positioning buckle structure and can rotate relative to the valve body (1). Multiple sealing rings (6) are provided between the valve cover (3) and the valve body (1).

2. The gate valve structure according to claim 1, which reduces assembly steps and lowers sealing leakage points, is characterized in that: The valve body (1) is provided with a connection hole (7). The positioning buckle structure is provided with an inner mounting annular groove (8) on the valve cover (3), an outer mounting annular groove (9) in the connection hole (7), and an open retaining ring (10) matching the inner mounting annular groove (8) and the outer mounting annular groove (9). A push-up inclined surface (11) is provided on one side of the inner mounting annular groove (8) on the valve cover (3). Multiple sealing rings (6) on the valve cover (3) form a seal with the connection hole (7) of the valve body (1).

3. The gate valve structure according to claim 2, which reduces assembly steps and lowers sealing leakage points, is characterized in that: The inner diameter of the open retaining ring (10) is smaller than the outer diameter of the inner mounting ring groove (8) and its outer diameter is larger than the inner diameter of the outer mounting ring groove (9) under normal stress conditions.

4. The gate valve structure according to claim 2, which reduces assembly steps and lowers sealing leakage points, is characterized in that: The opening of the connecting hole (7) is provided with an annular assembly slope (12).

5. The gate valve structure according to claim 1, which reduces assembly steps and lowers sealing leakage points, is characterized in that: The valve cover (3) is provided with a positioning boss (13) that can abut against the valve body (1).

6. The gate valve structure according to claim 1, which reduces assembly steps and lowers sealing leakage points, is characterized in that: The end of the valve stem (2) is fixedly connected to the handwheel (5) by a nut (14).

7. The gate valve structure according to claim 2, which reduces assembly steps and lowers sealing leakage points, is characterized in that: The valve cover (3) is provided with multiple sealing mounting grooves (15), and the sealing ring (6) is installed in the sealing mounting groove (15) and forms a seal between it and the connecting hole (7) of the valve body (1).

8. The gate valve structure according to claim 7, which reduces assembly steps and lowers sealing leakage points, is characterized in that: The valve cover (3) and the connecting hole (7) are respectively provided with corresponding mounting parts (16) and sealing parts (17). The mounting parts (16) on the valve cover (3) and the connecting hole (7) are matched and rotated to position. The inner mounting ring groove (8) and the outer mounting ring groove (9) are respectively provided on the mounting parts (16) of the valve cover (3) and the connecting hole (7). The sealing mounting groove (15) is provided on the sealing part (17) of the valve cover (3) and forms a seal with the sealing part of the connecting hole (7).

9. The gate valve structure according to claim 8, which reduces assembly steps and lowers sealing leakage points, is characterized in that: The valve cover (3) is also provided with a push-off inclined surface (18) on one side of the inner mounting annular groove (8).

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