Stop valve

Abstract

The utility model discloses a stop valve which comprises a valve body, a valve cover arranged on the valve body, a valve rod installed on the valve cover and extending into the valve body, a valve clack and a hand wheel connected to the valve rod, the valve clack is provided with an inserting groove for the valve rod to be inserted, the stop valve further comprises a positioning assembly, and a detachable assembling assembly is arranged between the inserting groove and the valve rod. The assembling assembly comprises an assembling path for assembling the inserting groove and the valve rod and a limiting path for limiting the inserting groove and the valve rod, and the positioning assembly positions the assembling assembly to be located in the limiting path and fixes the inserting groove and the valve rod. The utility model has the following advantages and effects: the valve clack and the valve rod can be conveniently assembled, and the structure is simple, so that the manual workload is reduced, and the production cost and the labor cost of an enterprise are reduced.

Description

Technical Field

[0001] This utility model relates to a valve, and more particularly to a gate valve. Background Technology

[0002] A gate valve, also known as a stop valve, is one of the most widely used types of valves. Its popularity stems from the low friction between the sealing surfaces during opening and closing, resulting in durability. It also features a small opening height, ease of manufacture, and convenient maintenance. Furthermore, it is suitable for both low and medium pressures, as well as high pressures. The gate valve closes by relying on the pressure of the valve stem to ensure a tight seal between the valve disc sealing surface and the valve seat sealing surface, thus preventing the flow of media.

[0003] Existing gate valves consist of a valve stem, a valve disc, and a fixing structure connecting the valve stem and valve disc. Due to limitations imposed by the shapes of the valve stem and valve disc, coupled with the irrationality of the existing structural design, the current fixing structure is complex and the assembly process is cumbersome. This significantly increases the workload for workers and indirectly raises production and labor costs for enterprises, resulting in a lack of promising market prospects for this type of structure. Utility Model Content

[0004] The purpose of this utility model is to provide a gate valve that enables convenient assembly of the valve disc and valve stem and has a simple structure, thereby reducing manual labor and lowering the production and labor costs of enterprises.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a stop valve, including a valve body, a valve cover disposed on the valve body, a valve stem installed on the valve cover and extending into the valve body, a valve disc, and a handwheel connected to the valve stem. The valve disc is provided with a slot for the valve stem to be inserted. The valve also includes a positioning component. A detachable assembly component is provided between the slot and the valve stem. The assembly component includes an assembly path that assembles the slot and the valve stem and a limiting path that limits the slot and the valve stem. The positioning component positions the assembly component in the limiting path and fixes the slot and the valve stem.

[0006] By adopting the above technical solution, the valve disc and valve stem are assembled using a set assembly component, which sequentially traverses an assembly path and a limiting path. When the assembly component reaches the limiting path, a positioning component positions it within the limiting path, thereby securing the valve disc and valve stem. This structure enables convenient and simple assembly of the valve disc and valve stem, reducing manual labor and lowering production and labor costs for the enterprise.

[0007] The positioning component is further configured to have a positioning state and a non-positioning state in which the positioning assembly component is located in the limiting path.

[0008] By adopting the above technical solution, this setting method can be used in conjunction with the assembly components to separate the valve stem and valve disc, thereby facilitating subsequent maintenance and individual replacement of parts, and thus reducing the later maintenance cost of the valve.

[0009] Further configured as follows: the assembly component includes multiple locking blocks fixedly disposed on the outer peripheral wall of the valve stem and multiple locking slots disposed on the side wall of the slot and engaging with the locking blocks, the multiple locking slots corresponding one-to-one with the multiple locking blocks, the locking slots including multiple sequentially connected assembly segments and limiting segments connecting the assembly segments, the limiting segments not being on a straight line with adjacent assembly segments, the free end of the limiting segments communicating with the slot opening.

[0010] By adopting the above technical solution, the card block enters the card slot and passes through the assembly section and the limiting section in sequence. By setting the limiting section and the adjacent assembly section to be on different lines, the assembly limiting of the valve disc and the valve stem is formed.

[0011] The setting is further configured such that the limiting segment and the adjacent assembly segment are mutually perpendicular along the side wall of the slot.

[0012] By adopting the above technical solution, this setting method can achieve the best limiting effect.

[0013] The positioning assembly is further configured such that: the positioning component includes a positioning bolt that passes through the valve disc and abuts against the valve stem, the positioning bolt being threadedly connected to the valve disc to restrict the locking block from entering the assembly section from the limiting section.

[0014] By adopting the above technical solution, the positioning bolt is threadedly connected to the valve disc to apply a counteracting positioning force to the valve stem, thereby restricting the locking block from entering the assembly section from the limiting section, thus achieving the positioning purpose.

[0015] A further configuration is made whereby the positioning bolt is located on the side of the valve stem opposite to the valve disc.

[0016] By adopting the above technical solution, disassembly and assembly operations are facilitated.

[0017] The valve disc is further configured such that a valve seat that matches the valve body forms a sealing annular sealing part, the positioning bolt is located in the inner ring of the sealing part, and a sealing pressure block is provided between the positioning bolt and the valve stem. The sealing pressure block is in a sealing sliding fit with the valve disc along the axis of the positioning bolt.

[0018] By adopting the above technical solution, the valve can be kept sealed while maintaining a simple structure.

[0019] In summary, this utility model has the following beneficial effects: it enables convenient assembly of the valve disc and valve stem with a simple structure, thereby reducing manual labor and lowering the production and labor costs of enterprises. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0021] Figure 2 This is a partial structural diagram of an embodiment;

[0022] Figure 3 This is a schematic diagram of the valve disc structure in the embodiment.

[0023] In the diagram: 1. Valve body; 2. Valve cover; 3. Valve stem; 4. Valve disc; 5. Handwheel; 6. Slot; 7. Assembly assembly; 71. Locking block; 72. Assembly section; 73. Limiting section; 8. Positioning bolt; 9. Sealing part; 10. Sealing pressure block. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings.

[0025] refer to Figures 1 to 3 A shut-off valve includes a valve body 1, a valve cover 2 fixedly disposed on the valve body 1, a valve stem 3 mounted on the valve cover 2 and extending into the valve body 1, a valve disc 4, and a handwheel 5 connected to the valve stem 3. The handwheel 5 is rotatably disposed on the valve cover 2 and threadedly engaged with the valve stem 3. The valve disc 4 has a slot 6 for inserting the valve stem 3. The valve body also includes a positioning assembly. A detachable assembly assembly 7 is provided between the slot 6 and the valve stem 3. The assembly assembly 7 includes an assembly path for assembling the slot 6 and the valve stem 3, and a limiting path for limiting the movement of the slot 6 and the valve stem 3. The positioning assembly positions the assembly assembly 7 within the limiting path and fixes the slot 6 and the valve stem 3.

[0026] The positioning component has a positioning state and a non-positioning state where the positioning assembly 7 is located in the limiting path. The assembly 7 includes multiple locking blocks 71 integrally disposed on the outer peripheral wall of the valve stem 3 and multiple locking slots formed on the side wall of the slot 6 and engaging with the locking blocks 71. The multiple locking slots are arranged one-to-one with the multiple locking blocks 71, and the number of locking blocks 71 and locking slots is preferably two. The locking slot includes multiple assembly segments 72 connected in sequence and limiting segments 73 connecting the assembly segments 72. The limiting segments 73 are not on a straight line with the adjacent assembly segments 72, and the free end of the limiting segments 73 communicates with the opening of the slot 6. The limiting segments 73 and the adjacent assembly segments 72 are mutually perpendicular along the side wall of the slot 6.

[0027] The positioning assembly includes a positioning bolt 8 that passes through the valve disc 4 and abuts against the lower end of the valve stem 3. The positioning bolt 8 is threadedly connected to the valve disc 4 to prevent the locking block 71 from entering the assembly section 72 from the limiting section 73. The positioning bolt 8 is located on the side of the valve disc 4 opposite to the valve stem 3. An annular sealing part 9 is formed on the valve disc 4 that cooperates with the valve seat of the valve body 1 to form a seal. The positioning bolt 8 is located in the inner ring of the sealing part 9. A sealing pressure block 10 is provided between the positioning bolt 8 and the valve stem 3. The sealing pressure block 10 is in a sealing sliding fit with the valve disc 4 along the axis of the positioning bolt 8.

[0028] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A shut-off valve, comprising a valve body (1), a valve cover (2) disposed on the valve body (1), a valve stem (3) mounted on the valve cover (2) and extending into the valve body (1), a valve disc (4), and a handwheel (5) connected to the valve stem (3), wherein the valve disc (4) is provided with a slot (6) for the valve stem (3) to be inserted, characterized in that: It also includes a positioning component. A detachable assembly component (7) is provided between the slot (6) and the valve stem (3). The assembly component (7) includes an assembly path that assembles the slot (6) and the valve stem (3) and a limiting path that limits the slot (6) and the valve stem (3). The positioning component positions the assembly component (7) in the limiting path and fixes the slot (6) and the valve stem (3).

2. The shut-off valve according to claim 1, characterized in that: The positioning component has a positioning state and a non-positioning state in which the positioning assembly component (7) is located in the limiting path.

3. The shut-off valve according to claim 2, characterized in that: The assembly component (7) includes multiple locking blocks (71) fixedly disposed on the outer peripheral wall of the valve stem (3) and multiple slots disposed on the side wall of the slot (6) and engaging with the locking blocks (71). The multiple slots are configured one-to-one with the multiple locking blocks (71). The slots include multiple assembly segments (72) connected in sequence and limiting segments (73) connecting the assembly segments (72). The limiting segments (73) are not on a straight line with the adjacent assembly segments (72). The free end of the limiting segments (73) communicates with the opening of the slot (6).

4. The shut-off valve according to claim 3, characterized in that: The limiting segment (73) and the adjacent assembly segment (72) are perpendicular to each other along the side wall of the slot (6).

5. The shut-off valve according to claim 3, characterized in that: The positioning assembly includes a positioning bolt (8) that passes through the valve disc (4) and abuts against the valve stem (3), the positioning bolt (8) being threaded to the valve disc (4) to restrict the locking block (71) from entering the assembly section (72) from the limiting section (73).

6. The shut-off valve according to claim 5, characterized in that: The positioning bolt (8) is located on the side opposite to the valve stem (3) of the valve disc (4).

7. The shut-off valve according to claim 5, characterized in that: The valve disc (4) has a valve seat that matches the valve body (1) to form a sealing annular sealing part (9). The positioning bolt (8) is located in the inner ring of the sealing part (9). A sealing block (10) is provided between the positioning bolt (8) and the valve stem (3). The sealing block (10) is in a sealing sliding fit with the valve disc (4) along the axis of the positioning bolt (8).

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