Multifunctional gate valve

Abstract

The utility model relates to the technical field of gate valves, in particular to a multifunctional gate valve which comprises a gate valve shell, a gate plate is arranged in the gate valve shell, and a valve rod used for controlling the gate plate is arranged at the upper end of the gate plate. An automatic cut-off mechanism is arranged at one end of the gate valve shell and comprises a cut-off shell, a cut-off valve seat, a cut-off valve element, an adjusting rod and a self-adaptive spring, the cut-off shell and the gate valve shell are integrally formed, and the cut-off valve seat is arranged at the end, away from the filter cartridge, in the cut-off shell; the cut-off valve element is arranged on one side of the cut-off valve seat, the adjusting rod is arranged in the cut-off valve element, the self-adaptive spring is arranged on one side of the cut-off valve element, and a cut-off sealing face is formed when the cut-off valve element is closed on one side of the cut-off valve seat.

Description

Technical Field

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

[0002] A gate valve is a gate that opens and closes. The gate moves in a direction perpendicular to the direction of the fluid. Gate valves can only be fully open or fully closed, and cannot be used for regulation or throttling. When a gate valve is closed, the sealing surface can be sealed solely by the pressure of the medium. That is, the sealing surface of the gate is pressed against the valve seat on the other side by the pressure of the medium to ensure the sealing surface. Gate valves are characterized by reliable sealing, suitability for high temperature and high pressure conditions, and bidirectional sealing.

[0003] Currently, Chinese patent CN220816592U discloses a self-filtering gate valve, which includes a right valve body, a left valve body integrally formed therewith is installed at the left end of the right valve body, and an upper valve body integrally formed therewith is installed at the top of the right valve body. A gate valve device is installed inside the right valve body and the upper valve body. The left valve body has a Y-shaped three-way structure. A filter device is installed inside the left valve body. The filter device includes a filter screen and a filter valve cover. The filter screen is embedded and fixed inside the left valve body. The connection and installation positions of the filter screen and the left valve body are in a sealed state. The filter valve cover is installed at the lower end of the left valve body and is fixed to the left valve body by screws installed on its surface. The filter valve cover is located below the filter screen. The gate valve device includes a gate and a gate control assembly installed above the gate.

[0004] Although this type of gate valve integrates filtration, its backflow protection performance is insufficient. Like traditional gate valves, it relies on manual operation to close in the event of backflow or leakage, and cannot automatically respond to media backflow or pressure changes. Although some check valves can achieve automatic shut-off, there is a delay problem when they are installed independently and used in conjunction with gate valves. Utility Model Content

[0005] In view of the above situation and to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a multifunctional gate valve. The above technical objective is achieved through the following technical solution:

[0006] A multi-functional gate valve, comprising:

[0007] A gate valve housing, wherein a gate plate is provided inside the gate valve housing, and a valve stem for controlling the gate plate is provided at the upper end of the gate plate;

[0008] An automatic shut-off mechanism is provided at one end of the gate valve housing. The automatic shut-off mechanism includes a shut-off housing, a shut-off valve seat, a shut-off valve core, an adjusting rod, and an adaptive spring. The shut-off housing is integrally formed with the gate valve housing. The shut-off valve seat is located inside the shut-off housing at the end away from the filter cartridge. The shut-off valve core is located on one side of the shut-off valve seat. The adjusting rod is located inside the shut-off valve core. The adaptive spring is located on one side of the shut-off valve core. When the shut-off valve core is closed on one side of the shut-off valve seat, it forms a shut-off sealing surface.

[0009] Furthermore, a filter housing is provided between the gate valve housing and the cut-off housing. The gate valve housing, the filter housing, and the cut-off housing together constitute an integral valve body. A filter cartridge is provided inside the filter housing.

[0010] Furthermore, the adjusting rod is provided with a first connecting member and a second connecting member at both ends. The first connecting member includes a first limiting block and a first connecting rod disposed at both ends of the first limiting block. The second connecting member includes a second limiting block and a second connecting rod disposed at both ends of the second limiting block. The first connecting rod is fixed to the inner wall of the cut-off valve seat, and the second connecting rod is fixed to the inner wall of the cut-off outer shell.

[0011] Furthermore, the gate valve housing and the filter housing form a Y-shaped three-way channel. The filter cartridge is disposed inside the Y-shaped three-way channel, and a filter screen is disposed on the side wall of the filter cartridge. The left side of the Y-shaped three-way channel is the medium inflow side. The filter cartridge is inclinedly disposed inside the Y-shaped three-way channel. The upper opening of the filter cartridge faces the medium inflow side, and the lower end of the filter cartridge faces the bottom of the Y-shaped three-way channel. The outer wall of the upper opening of the filter cartridge is embedded in the inner wall of the integrated valve body to form a filter-side sealing surface.

[0012] Furthermore, a removable filter valve cover is provided at the lower end of the integrated valve body.

[0013] Furthermore, a gate valve handwheel is provided at the upper end of the valve stem.

[0014] In summary, this utility model has the following beneficial effects:

[0015] ① The shut-off mechanism on the inlet side and the auxiliary gate valve on the outlet side work together to further improve the reliability of the valve's reverse sealing. The automatic shut-off mechanism can adaptively and dynamically adjust the sealing pressure to adapt to different working conditions, effectively preventing medium backflow and pressure shock. Both the gate and the shut-off valve core have bidirectional sealing capabilities to ensure sealing reliability during forward and reverse flow, making it suitable for complex working conditions.

[0016] ② The three valve bodies—the cut-off housing, the filter housing, and the gate valve housing—are combined into one, eliminating two flange pairs. This reduces the valve installation length and weight, and eliminates one system leakage point. The three-in-one integrated valve body structure design also ensures the unified realization of the three functions, while taking into account the feasibility of manufacturing processes, ensuring convenient cleaning, machining, assembly, and disassembly. Attached Figure Description

[0017] The accompanying drawings, which are provided to further illustrate the present invention and form part of this application, do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] In the diagram, 1. Gate valve housing; 101. Gate plate; 102. Valve stem; 103. Gate valve handwheel; 201. Cut-off housing; 202. Cut-off valve seat; 203. Cut-off valve core; 204. Adjusting rod; 205. Adaptive spring; 3. Filter housing; 301. Filter cartridge; 302. Filter screen; 401. First limit block; 402. First connecting rod; 501. Second limit block; 502. Second connecting rod; 6. Y-shaped three-way passage; 7. Filter valve cover. Detailed Implementation

[0020] The foregoing and other technical contents, features and effects of this utility model are described in conjunction with the appendix below. Figure 1 The detailed description of the embodiments will make this clear. All structural details mentioned in the following embodiments are based on the accompanying drawings.

[0021] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings.

[0022] Example 1: A multi-functional gate valve, comprising:

[0023] The gate valve housing 1 has a gate plate 101 inside. The upper end of the gate plate 101 is provided with a valve stem 102 for controlling the gate plate 101. The upper end of the valve stem 102 is provided with a gate valve handwheel 103. The gate plate 101 and the valve stem 102 are combined to control the flow of the medium. The gate plate 101 can be raised or lowered by rotating the gate valve handwheel 103.

[0024] An automatic shut-off mechanism is provided at one end of the gate valve housing 1. The automatic shut-off mechanism is used to automatically close the valve when the medium flows in reverse or under abnormal pressure to prevent backflow or leakage. The specific structure of the automatic shut-off mechanism includes a shut-off housing 201, a shut-off valve seat 202, a shut-off valve core 203, an adjusting rod 204, and an adaptive spring 205. The shut-off housing 201 is integrally formed with the gate valve housing 1. The shut-off valve seat 202 is located inside the shut-off housing 201 at the end away from the filter cartridge 301. The shut-off valve core 203 is located on one side of the shut-off valve seat 202. The adjusting rod 204 is located inside the shut-off valve core 203. The adaptive spring 205 is located on one side of the shut-off valve core 203. When the shut-off valve core 203 is closed on one side of the shut-off valve seat 202, a shut-off sealing surface is formed.

[0025] A filter housing 3 is provided between the gate valve housing 1 and the shut-off housing 201. The gate valve housing 1, the filter housing 3, and the shut-off housing 201 together constitute an integrated valve body, reducing the number of separate connection points. The filter housing 3 is equipped with a filter cartridge 301, which is used to filter impurities in the medium and protect downstream valve components.

[0026] The adjusting rod 204 has a first connector and a second connector at both ends. The first connector includes a first limiting block 401 and a first connecting rod 402 at both ends of the first limiting block 401. The second connector includes a second limiting block 501 and a second connecting rod 502 at both ends of the second limiting block 501. The first connecting rod 402 is fixed to the inner wall of the shut-off valve seat 202, and the second connecting rod 502 is fixed to the inner wall of the shut-off outer shell 201. The adjusting rod 204 restricts the movement of the shut-off valve core 203 through the first connector and the second connector to ensure stability when closed.

[0027] The lower end of the integrated valve body is provided with a removable filter valve cover 7, which facilitates cleaning or replacement of the filter cartridge 301. The gate valve housing 1 and the filter housing 3 form a Y-shaped three-way channel 6. The Y-shaped three-way channel 6 optimizes the flow path of the medium. The filter cartridge 301 is set inside the Y-shaped three-way channel 6. A filter screen 302 is set on the side wall of the filter cartridge 301. The left side of the Y-shaped three-way channel 6 is the medium inflow side. The filter cartridge 301 is inclined inside the Y-shaped three-way channel 6. The upper opening of the filter cartridge 301 faces the medium inflow side, and the lower end of the filter cartridge 301 faces the bottom of the Y-shaped three-way channel 6. The inclined design of the filter cartridge 301 facilitates the sedimentation of impurities to the filter valve cover 7. The filter screen 302 intercepts particulate matter. The outer wall of the upper opening of the filter cartridge 301 is embedded in the inner wall of the integrated valve body to form a filter side sealing surface.

[0028] During operation, the medium enters the internal flow channel of the cut-off housing 201 from the left side. The medium first passes through the inner cavity of the left-side cut-off mechanism, pushing open the cut-off valve core 203, causing the cut-off valve core 203 to disengage from the cut-off valve seat 202, and the valve opens naturally. If the medium flows backward from the right side, the cut-off valve core 203 relies on the pressure difference between the two sides and, under the action of the adaptive spring 205, moves to the left to seal with the cut-off valve seat 202, forming a sealing surface, blocking the backflow, and the valve automatically closes, thereby realizing unidirectional flow of the valve.

[0029] The middle part of the entire integrated structure is a filter. When impurities pass through the filter screen 302, they are automatically intercepted and accumulate at the bottom of the filter screen 302. After accumulating to a certain extent, the impurities can be cleaned periodically by opening the filter valve cover 7.

[0030] The medium then enters the flow channel of the right gate valve. When the gate 101 is open, the medium flows smoothly through the valve and into the downstream pipeline system. When the gate 101 is closed, the valve is closed. Even if there is a leak in the front shut-off mechanism in the integrated structure, reliable shut-off can be achieved to prevent internal leakage of the valve.

[0031] The above description is a further detailed explanation of the present utility model in conjunction with specific embodiments, and it should not be considered that the specific implementation of the present utility model is limited to this. For those skilled in the art to which the present utility model pertains and related fields, any extensions, operation methods, and data substitutions made based on the technical solution concept of the present utility model should fall within the protection scope of the present utility model.

Claims

1. A multi-functional gate valve, characterized by, include: A gate valve housing (1) is provided inside the gate valve housing (1), and a gate plate (101) is provided at the upper end of the gate plate (101) for controlling the gate plate (101). An automatic shut-off mechanism is provided at one end of the gate valve housing (1). The automatic shut-off mechanism includes a shut-off housing (201), a shut-off valve seat (202), a shut-off valve core (203), an adjusting rod (204), and an adaptive spring (205). The shut-off housing (201) is integrally formed with the gate valve housing (1). The shut-off valve seat (202) is located inside the shut-off housing (201) at one end away from the filter cartridge (301). The shut-off valve core (203) is located on one side of the shut-off valve seat (202). The adjusting rod (204) is located inside the shut-off valve core (203). The adaptive spring (205) is located on one side of the shut-off valve core (203). When the shut-off valve core (203) is closed on one side of the shut-off valve seat (202), it forms a shut-off sealing surface.

2. A multi-functional gate valve according to claim 1, characterized in that: A filter housing (3) is provided between the gate valve housing (1) and the cut-off housing (201). The gate valve housing (1), the filter housing (3) and the cut-off housing (201) together constitute an integrated valve body. A filter cartridge (301) is provided inside the filter housing (3).

3. The multi-functional gate valve according to claim 1, wherein: The adjusting rod (204) is provided with a first connector and a second connector at both ends. The first connector includes a first limiting block (401) and a first connecting rod (402) provided at both ends of the first limiting block (401). The second connector includes a second limiting block (501) and a second connecting rod (502) provided at both ends of the second limiting block (501). The first connecting rod (402) is fixed to the inner wall of the shut-off valve seat (202), and the second connecting rod (502) is fixed to the inner wall of the shut-off outer shell (201).

4. A multifunctional gate valve according to claim 2, characterized in that: The gate valve housing (1) and the filter housing (3) form a Y-shaped three-way channel (6). The filter cylinder (301) is installed inside the Y-shaped three-way channel (6). A filter screen (302) is installed on the side wall of the filter cylinder (301). The left side of the Y-shaped three-way channel (6) is the medium inflow side. The filter cylinder (301) is inclined inside the Y-shaped three-way channel (6). The upper opening of the filter cylinder (301) faces the medium inflow side. The lower end of the filter cylinder (301) faces the bottom of the Y-shaped three-way channel (6). The outer wall of the upper opening of the filter cylinder (301) is embedded in the inner wall of the integrated valve body to form a filter side sealing surface.

5. A multifunctional gate valve according to claim 4, characterized in that: The lower end of the integrated valve body is provided with a removable filter valve cover (7).

6. A multifunctional gate valve according to claim 1, characterized in that: The upper end of the valve stem (102) is provided with a gate valve handwheel (103).

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