A gate valve

Abstract

This utility model relates to the field of valve technology, and more particularly to a gate valve. The gate valve includes a valve stem, a valve cover, and a limiting member. The valve stem has a limiting protrusion and passes through the valve cover, which has a mounting hole penetrating its inner wall. The limiting member includes a connecting insertion part and a disassembly part. The insertion part is inserted into the mounting hole and partially abuts against the upper end of the limiting protrusion. The disassembly part is located outside the valve cover. By setting the insertion part of the limiting member to abut against the upper end of the limiting protrusion, the gate valve can prevent the valve stem from moving upward relative to the valve cover, thereby ensuring the structural stability of the gate valve during operation. The disassembly part is located outside the valve cover; when it is necessary to disassemble the valve stem, a disassembly tool can be used to remove the insertion part from the mounting hole, thus removing the valve stem from the valve cover. The operation is simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a gate valve. Background Technology

[0002] Gate valves are a type of valve widely used in pipeline systems, also known as sluice gate valves or gate valves. A gate valve typically consists of a valve body and a gate. The valve body has a passage for fluid to pass through, and the flow of fluid within the passage is controlled by the up-and-down movement of the gate.

[0003] In related technologies, to prevent the valve stem from moving upward relative to the valve cover, a limiting protrusion is usually provided on the valve stem, and a clamping nut is threaded onto the valve cover. The clamping nut cooperates with the limiting protrusion on the valve stem to prevent the valve stem from moving upward relative to the valve cover, thereby ensuring the structural stability of the gate valve during operation and preventing abnormal displacement of the valve stem due to factors such as fluid pressure, which would affect the sealing performance and control effect of the valve.

[0004] However, in practical applications, especially in special scenarios such as valve anti-theft and confined spaces, the above settings require rotating and tightening the nut to disassemble the valve stem, which is inconvenient.

[0005] Therefore, there is an urgent need for a gate valve to solve the above problems. Utility Model Content

[0006] The purpose of this utility model is to provide a gate valve that improves the ease of disassembly and assembly of the valve stem and the efficiency of maintenance.

[0007] To achieve the above objectives, the following technical solution is provided:

[0008] A gate valve, comprising:

[0009] The valve stem has a limiting protrusion;

[0010] A valve cover, wherein the valve stem passes through the valve cover, and the valve cover has a mounting hole penetrating its inner wall;

[0011] The limiting component includes a plug-in part and a disassembly part connected to each other. The plug-in part is inserted into the mounting hole and partially abuts against the upper end of the limiting protrusion. The disassembly part is located outside the valve cover.

[0012] Alternatively, the valve stem is installed vertically, and the plug is installed horizontally.

[0013] As an optional solution, the limiting member includes two insertion parts, one end of each insertion part is fixedly connected to both ends of the disassembly part; the valve cover has two mounting holes, each insertion part corresponds to one mounting hole, and the insertion parts are spaced apart on both sides of the valve stem.

[0014] As an optional solution, the connecting rod segment, the arc segment, and the plug-in portion are integrally formed.

[0015] As an optional feature, the valve cover has a limiting step that abuts against the lower end of the limiting protrusion.

[0016] As an optional solution, the valve cover includes a main body and a protrusion connected to each other. The protrusion has a first hole segment, and the main body has a second hole segment that penetrates its inner wall. The first hole segment and the second hole segment together form the mounting hole.

[0017] As an optional solution, a first sealing element is provided between the valve stem and the valve cover, and the limiting protrusion has an installation groove for installing the first sealing element.

[0018] As an optional feature, the gate valve further includes:

[0019] The valve body has a fluid passage, and the valve cover is connected to the valve body;

[0020] A gate is disposed in the valve body and threadedly connected to the bottom of the valve stem. The valve stem can rotate about its own axis so that the gate can move along the axis of the valve stem to open or close the fluid passage.

[0021] As an optional solution, the valve body is provided with a sealing part, which is located on both sides of the gate and can seal with the gate.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] The gate valve provided by this utility model can prevent the valve stem from moving upward relative to the valve cover by setting the plug part of the limiting member to abut against the upper end of the valve limiting protrusion, thereby ensuring the structural stability of the gate valve during operation. The disassembly part is located outside the valve cover. When it is necessary to disassemble the valve stem, the plug part can be removed from the valve cover by using a disassembly tool. The operation is simple and convenient. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model 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 the content of the embodiments of this utility model and these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the gate valve provided in an embodiment of this utility model;

[0026] Figure 2 A cross-sectional view of a gate valve provided in an embodiment of this utility model;

[0027] Figure 3 A schematic diagram of the valve cover provided in an embodiment of this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the limiting member provided in an embodiment of the present utility model.

[0029] Figure label:

[0030] 100. Gate valve;

[0031] 10. Valve stem; 11. Limiting protrusion; 111. Mounting groove;

[0032] 20. Valve cover; 2001. Mounting hole; 21. Main body; 211. Second hole section; 212. Limiting step; 22. Protrusion; 221. First hole section;

[0033] 30. Limiting component; 31. Insertion part; 32. Disassembly / assembly part; 321. Arc segment; 322. Connecting rod segment;

[0034] 40. Valve body; 41. Fluid passage; 42. Sealing part;

[0035] 50. Gate;

[0036] 60. Handwheel;

[0037] 71. First seal; 72. Second seal. Detailed Implementation

[0038] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0039] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0040] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0042] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0044] like Figure 1 and Figure 2 As shown, this embodiment provides a gate valve 100, which includes a valve body 40, a valve cover 20, a valve stem 10, and a gate 50. The valve body 40 has a fluid passage 41. The valve cover 20 is connected to the valve body 40. The valve stem 10 passes through the valve cover 20. The gate 50 is disposed inside the valve body 40 and is threadedly connected to the bottom of the valve stem 10. The valve stem 10 can rotate around its own axis so that the gate 50 moves along the axis of the valve stem 10 to open or close the fluid passage 41, thereby realizing the opening or closing of the gate valve 100, and controlling the cut-off or flow of fluid in the fluid passage 41.

[0045] like Figures 1-4 As shown, the gate valve 100 provided in this embodiment also includes a limiting member 30. The valve stem 10 has a limiting protrusion 11, and the valve cover 20 has a mounting hole 2001 penetrating its inner wall. The limiting member 30 includes a plug-in part 31 and a disassembly part 32 connected to each other. The plug-in part 31 is plugged into the mounting hole 2001 and partially abuts against the limiting protrusion 11. The disassembly part 32 is located outside the valve cover 20.

[0046] By setting the insertion part 31 of the limiting member 30 to abut against the upper end of the valve limiting protrusion 11, the valve stem 10 can be prevented from moving upward relative to the valve cover 20, thereby ensuring the structural stability of the gate valve 100 during operation. The disassembly part 32 is located outside the valve cover 20. When it is necessary to disassemble the valve stem 10, the insertion part 31 can be disassembled from the mounting hole 2001 using a disassembly tool, and the valve stem 10 can be removed from the valve cover 20. The operation is simple and convenient.

[0047] Optionally, the valve stem 10 is installed vertically and the plug portion 31 is installed horizontally. That is, the plug portion 31 is perpendicular to the axial direction of the valve stem 10 to ensure the limiting effect of the limiting member 30 on the valve stem 10 and prevent the valve stem 10 from moving relative to the valve cover 20 along the axis.

[0048] In some embodiments, the insertion part 31 and the disassembly part 32 are arranged at an angle. When it is necessary to disassemble the valve stem 10, a disassembly tool can be inserted between the valve cover 20 and the disassembly part 32, and the limiting member 30 can be pried out using the valve cover 20 as a fulcrum. At this time, the disassembly tool can be a screwdriver, pry bar, or other rod-shaped or strip-shaped tool.

[0049] In another alternative embodiment, the insertion part 31 and the disassembly part 32 are arranged coaxially. When it is necessary to disassemble the valve stem 10, the insertion part 31 can be pulled out from the mounting hole 2001 by clamping the disassembly part 32 with a disassembly tool. In this case, the disassembly tool can be a clamping tool such as pliers.

[0050] Optionally, the limiting member 30 includes two insertion portions 31, one end of each insertion portion 31 being fixedly connected to both ends of the disassembly portion 32; the valve cover 20 has two mounting holes 2001, each insertion portion 31 corresponding to one mounting hole 2001, and the insertion portions 31 are spaced apart on both sides of the valve stem 10. That is to say, the limiting member 30 is U-shaped. On the one hand, it can make the valve stem 10 bear force evenly and prevent the valve stem 10 from shifting. On the other hand, when installing the limiting member 30, by holding the disassembly portion 32, the insertion portions 31 at both ends can be aligned with the two mounting holes 2001 and the two insertion portions 31 can be inserted at the same time, which is simple and convenient and improves the installation efficiency; when it is necessary to disassemble the valve stem 10, simply pull the disassembly portion 32 away from the valve cover 20 to remove the two insertion portions 31 at the same time, which greatly improves convenience.

[0051] Optionally, the disassembly and assembly part 32 includes a connected arc segment 321 and a connecting rod segment 322. The insertion part 31 is connected to the arc segment 321. By setting the arc segment 321, stress is dispersed, stress concentration is avoided, the strength of the limiting member 30 is improved, and the service life of the limiting member 30 is improved, and the processing difficulty is reduced.

[0052] Optionally, the connecting rod segment 322, the arc segment 321, and the plug portion 31 are integrally formed, which can reduce the number of connection points and improve the overall strength of the limiting member 30.

[0053] like Figure 3 As shown, the valve cover 20 includes a main body 21 and a protrusion 22 connected to each other. The protrusion 22 has a first hole 221, and the main body 21 has a second hole 211 penetrating its inner wall. The first hole 221 and the second hole 211 together form a mounting hole 2001. By providing the protrusion 22, the length of the mounting hole 2001 can be extended to ensure the depth of insertion of the insertion part 31 into the valve cover 20, thereby ensuring that the limiting member 30 can be stably inserted into the valve cover 20.

[0054] Optionally, the second hole 211 penetrates the outer wall of the main body 21 so that the insertion part 31 can extend out of the main body 21 after being inserted into the mounting hole 2001, thereby further ensuring the stability of the connection between the limiting member 30 and the valve cover 20.

[0055] Optionally, the valve cover 20 (specifically the main body 21) has a limiting step 212, which abuts against the lower end of the limiting protrusion 11. By setting the limiting step 212 to abut against the lower end of the limiting protrusion 11, the valve stem 10 can be prevented from moving downward relative to the valve cover 20, thereby ensuring the structural stability of the gate valve 100 during operation.

[0056] It should be noted that the directional terms such as "up," "down," "inner," and "outer" used in this embodiment are all in the context of... Figure 2 The description of the orientation and positional relationships shown should not be construed as a limitation of this embodiment.

[0057] like Figure 2 As shown, in order to improve the sealing performance between the valve stem 10 and the valve cover 20, a first sealing element 71 is provided between the valve stem 10 and the valve cover 20. Optionally, the first sealing element 71 is a rubber sealing ring, which has a good sealing effect, is easy to install, and has a low cost.

[0058] Optionally, the limiting protrusion 11 has an installation groove 111 for installing the first seal 71, so as to realize the positioning and installation of the first seal 71 and ensure its installation stability.

[0059] In this embodiment, there are two first sealing elements 71, which are arranged at intervals along the axial direction of the valve stem 10. The mounting groove 111 is provided in a one-to-one correspondence with the first sealing elements 71 to further improve the sealing performance between the valve cover 20 and the valve stem 10. In other embodiments, the number of first sealing elements 71 may be three, four or more, and designers can make an adaptive selection according to actual needs.

[0060] Optionally, a second sealing element 72 is provided between the valve cover 20 and the valve body 40 to improve the sealing performance between the valve cover 20 and the valve body 40. The second sealing element 72 may specifically be a sealing ring.

[0061] Optionally, a sealing part 42 is provided inside the valve body 40. The sealing part 42 is located on both sides of the gate 50 and is in sealing cooperation with the gate 50. When the gate 50 moves downward to gradually close the fluid passage 41, the gate 50 and the sealing part 42 are in sealing cooperation to improve the sealing effect and sealing reliability of the gate valve 100.

[0062] Optionally, the gate valve 100 also includes a handwheel 60, which is connected to the part of the valve stem 10 that extends out of the valve cover 20. By rotating the handwheel 60, the valve stem 10 can be driven to rotate synchronously, reducing the operational effort.

[0063] Note that in the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0064] The above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A gate valve, characterized in that, include: The valve stem (10) has a limiting protrusion (11); Valve cover (20), the valve stem (10) passes through the valve cover (20), the valve cover (20) has a mounting hole (2001) through its inner wall; The limiting member (30) includes a plug-in part (31) and a disassembly part (32) connected to each other. The plug-in part (31) is inserted into the mounting hole (2001) and partially abuts against the upper end of the limiting protrusion (11). The disassembly part (32) is located outside the valve cover (20).

2. The gate valve according to claim 1, characterized in that, The valve stem (10) is installed vertically, and the plug-in part (31) is installed horizontally.

3. The gate valve according to claim 1, characterized in that, The limiting member (30) includes two plug-in parts (31), one end of each plug-in part (31) is fixedly connected to both ends of the disassembly part (32); the valve cover (20) has two mounting holes (2001), each plug-in part (31) corresponds to one mounting hole (2001), and the plug-in parts (31) are spaced apart on both sides of the valve stem (10).

4. The gate valve according to claim 3, characterized in that, The disassembly / assembly part (32) includes a connecting rod section (322) and an arc section (321) connected to each other, and the plug-in part (31) is connected to the arc section (321).

5. The gate valve according to claim 4, characterized in that, The connecting rod segment (322), the arc segment (321), and the plug-in portion (31) are integrally formed.

6. The gate valve according to claim 1, characterized in that, The valve cover (20) has a limiting step (212) that abuts against the lower end of the limiting protrusion (11).

7. The gate valve according to claim 1, characterized in that, The valve cover (20) includes a main body (21) and a protrusion (22) connected to each other. The protrusion (22) has a first hole (221), and the main body (21) has a second hole (211) penetrating its inner wall. The first hole (221) and the second hole (211) together form the mounting hole (2001).

8. The gate valve according to any one of claims 1-7, characterized in that, A first sealing element (71) is provided between the valve stem (10) and the valve cover (20), and the limiting protrusion (11) has an installation groove (111) for installing the first sealing element (71).

9. The gate valve according to any one of claims 1-7, characterized in that, The gate valve also includes: The valve body (40) has a fluid passage (41), and the valve cover (20) is connected to the valve body (40); A gate (50) is disposed inside the valve body (40) and threadedly connected to the bottom of the valve stem (10). The valve stem (10) can rotate about its own axis so that the gate (50) can move along the axis of the valve stem (10) to open or close the fluid passage (41).

10. The gate valve according to claim 9, characterized in that, The valve body (40) is provided with a sealing part (42), which is located on both sides of the gate (50) and can seal with the gate (50).

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