A large flow stop valve

Abstract

This utility model discloses a high-flow-rate shut-off valve, including an inlet pipe and an outlet pipe. The top of the inlet pipe has an externally threaded tube, and a limit assembly is threadedly connected to the outer wall of the externally threaded tube. A valve assembly is mounted on top of the limit assembly, and a base plate is fitted onto the bottom of the valve assembly. The limit assembly is used at least to limit and fix the valve assembly, and the valve assembly is used at least to open and close the fluid. In this utility model, the limit assembly is threadedly connected to the externally threaded tube. When the sealing ring wears and needs replacement, the valve assembly can be easily removed from the inlet pipe simply by unscrewing the limit assembly, without disassembling other complex parts or removing the entire valve, greatly simplifying the replacement process. The positioning protrusion on the top of the base plate engages with the cover plate, further enhancing the connection stability between the valve assembly and the base plate, effectively reducing vibration and friction between components when a large flow of fluid passes through.

Description

Technical Field

[0001] This utility model relates to the field of fluid control technology, specifically to a large flow shut-off valve. Background Technology

[0002] In the field of industrial fluid transportation, high-flow shut-off valves are key components for controlling fluid flow, and their performance directly affects the safety and stability of the system. The sealing rings of these valves, as crucial components for ensuring fluid sealing, are subjected to long-term fluid erosion and friction, making them highly susceptible to wear and aging. Once the sealing rings fail, fluid leakage will occur, resulting not only in resource waste but also potentially causing safety accidents.

[0003] However, replacing the sealing rings of traditional high-flow-rate gate valves is extremely cumbersome. Their structural design ensures the sealing rings are tightly fixed to the valve body, requiring extensive disassembly with specialized tools, sometimes even necessitating the removal of the entire valve from the pipeline. This consumes significant time and labor costs, and frequent disassembly and reassembly can damage other valve components, reducing the valve's lifespan. Therefore, there is an urgent need to design a high-flow-rate gate valve to solve these problems. Utility Model Content

[0004] The purpose of this invention is to provide a high-flow-rate shut-off valve to address the aforementioned shortcomings in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A high-flow shut-off valve includes an inlet pipe and an outlet pipe. The top of the inlet pipe is provided with an external threaded pipe, and the outer wall of the external threaded pipe is threadedly connected to a limit assembly. The top of the limit assembly is provided with a valve assembly, and the bottom of the valve assembly is sleeved with a base plate. The limit assembly is used at least for limiting and fixing the valve assembly, and the valve assembly is used at least for opening and closing the fluid.

[0007] Preferably, the limiting component includes a limiting cover and a fixing block, wherein the limiting cover is threaded into an external threaded pipe.

[0008] Preferably, the valve assembly includes a handwheel, a connecting rod at the bottom of the handwheel, a gasket at the bottom of the connecting rod, a lead screw at the bottom of the gasket, a cover plate at the bottom of the lead screw, and a sealing ring on the inner wall of the cover plate.

[0009] Preferably, the fixing block has an internal thread, and the lead screw is threadedly connected to the fixing block through the internal thread.

[0010] Preferably, the fixing block and the limiting cover are integrally formed, and the outer diameter of the fixing block is smaller than the outer diameter of the limiting cover.

[0011] Preferably, the top of the base plate is provided with a positioning protrusion, which is sleeved with the cover plate.

[0012] In the above technical solution, the large flow shut-off valve provided by this utility model has the following advantages:

[0013] (1) The limiting component is connected to the external thread pipe. When the sealing ring is worn and needs to be replaced, the valve assembly can be easily removed from the water inlet pipe by simply unscrewing the limiting component. There is no need to disassemble other complex parts or remove the valve as a whole, which greatly simplifies the replacement process.

[0014] (2) The positioning protrusion on the top of the base plate is fitted with the cover plate, which further enhances the connection stability between the valve assembly and the base plate. When the fluid flows through at a large flow rate, it effectively reduces the vibration and friction between the components, which not only improves the working reliability of the gate valve, but also reduces the risk of component loosening and damage caused by vibration, and extends the overall service life of the gate valve. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 This is a three-dimensional structural view of an embodiment of a high-flow-rate shut-off valve according to the present invention.

[0017] Figure 2 This is a structural cross-sectional view of an embodiment of a high-flow-rate shut-off valve according to the present invention.

[0018] Figure 3 This is a perspective view of the external threaded pipe structure provided for an embodiment of a high-flow-rate shut-off valve of this utility model.

[0019] Figure 4 This is a perspective view of the valve assembly structure provided for an embodiment of a high-flow-rate shut-off valve according to this utility model.

[0020] 1. Inlet pipe; 2. Outlet pipe; 3. Limiting assembly; 31. Limiting cover; 32. Fixing block; 4. Valve assembly; 41. Handwheel; 42. Connecting rod; 43. Gasket; 44. Lead screw; 45. Cover plate; 46. Sealing ring; 5. External threaded pipe; 6. Base plate. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0022] like Figure 1-4 As shown in the figure, a high-flow shut-off valve provided by this utility model embodiment includes an inlet pipe 1 and an outlet pipe 2. The top of the inlet pipe 1 is provided with an external threaded pipe 5. The outer wall of the external threaded pipe 5 is threadedly connected to a limit assembly 3. The top of the limit assembly 3 is provided with a valve assembly 4. The bottom of the valve assembly 4 is sleeved with a base plate 6. The limit assembly 3 is used at least for limiting and fixing the valve assembly 4, and the valve assembly 4 is used at least for opening and closing the fluid.

[0023] In this embodiment, the system includes an inlet pipe 1 and an outlet pipe 2. The inlet pipe 1 has an externally threaded pipe 5 at its top, extending vertically upwards. The externally threaded pipe 5 at its top forms a regular spiral pattern through a threading process. The top of the externally threaded pipe 5 engages with the internal thread on the inner side of the limiting cover 31. During installation, the limiting cover 31 is rotated clockwise along the externally threaded pipe 5, and the friction between the threads causes the limiting cover 31 to gradually press down until it is tightly fitted to the top of the inlet pipe 1. A limiting component 3 is threadedly connected to the outer wall of the externally threaded pipe 5. A valve component 4 is provided at the top of the limiting component 3, and a base plate 6 is fitted onto the bottom of the valve component 4. The limiting component 3 is used at least to limit and fix the valve component 4, and the valve component 4 is used at least to open and close the fluid.

[0024] Specifically, the limiting component 3 includes a limiting cover 31 and a fixing block 32. The limiting cover 31 is threadedly engaged with the external threaded pipe 5. A cylindrical fixing block 32 is integrally formed at the center of the upper surface of the limiting cover 31. The outer diameter of the fixing block 32 is slightly smaller than that of the limiting cover 31, forming a stepped structure. This design can ensure the connection strength between the limiting cover 31 and the external threaded pipe 5, and also provide positioning space for the valve component 4. The limiting cover 31 has a slot, and the connecting rod 42 is rotatably connected in the slot.

[0025] Specifically, valve assembly 4 includes a handwheel 41, located at the top of the assembly. The handwheel 41 is disc-shaped with anti-slip texture for easy gripping and force application. A connecting rod 42 is located at the bottom of the handwheel 41, with the connecting rod 42 vertically welded to the center of the bottom. This connecting rod 42 passes through a pre-drilled hole in the center of the limiting cover 31, forming a sliding fit. A gasket 43, made of rubber, is located at the bottom of the connecting rod 42, providing cushioning and sealing. A lead screw 44 is located at the bottom of the gasket 43, with a standard external thread precisely matching the internal thread of the fixing block 32. When the operator rotates the handwheel 41, the lead screw 44 will undergo axial displacement due to the threaded transmission principle. A cover plate 45 is located at the bottom of the lead screw 44, with a sealing ring 46 on its inner wall. The cover plate 45 is disc-shaped, and the sealing ring 46 is embedded in its inner wall through a hot-pressing process. The sealing ring 46 is made of polytetrafluoroethylene, providing excellent sealing and corrosion resistance.

[0026] Specifically, the fixing block 32 has an internal thread, and the lead screw 44 is threadedly connected to the fixing block 32 through the internal thread.

[0027] Specifically, the fixing block 32 and the limiting cover 31 are integrally formed, and the outer diameter of the fixing block 32 is smaller than the outer diameter of the limiting cover 31.

[0028] Specifically, the top of the base plate 6 is provided with a positioning protrusion, which is fitted with the cover plate 45. The base plate 6 is fixedly installed on the top of the water outlet pipe 2, and the positioning protrusion on its surface is precisely fitted with the groove at the bottom of the cover plate 45 to form a circumferential limiting structure.

[0029] Operating steps: 1. The operator holds the handwheel 41 of valve assembly 4 and slowly rotates it counterclockwise;

[0030] Second, the rotation of the handwheel 41 drives the connecting rod 42 to rotate synchronously. Since the lead screw 44 is connected to the fixed block 32 through the internal thread, under the limiting action of the fixed block 32, the lead screw 44 converts the rotational motion into upward linear motion.

[0031] 3. The screw 44 drives the cover plate 45 to rise gradually, so that the sealing ring 46 is separated from the pipe contact surface, and a fluid channel is formed between the water inlet pipe 1 and the water outlet pipe 2.

[0032] 4. When closing, the operator holds the handwheel (41) and turns it clockwise.

[0033] 5. When the sealing ring 46 is worn and needs to be replaced, the operator uses a tool to turn the limit cover 31 of the limit component 3 counterclockwise. Since the limit cover 31 is threaded with the external threaded pipe 5, the limit component 3 can be removed from the external threaded pipe 5.

[0034] 6. Place the valve assembly 4 with the new sealing ring 46 installed back into the top of the water inlet pipe 1, so that the lead screw 44 is aligned with the internal thread of the fixing block 32;

[0035] 7. Install the limit component 3 back into the external threaded pipe 5, and turn the limit cover 31 clockwise to limit and fix the valve component 4 through the limit component 3, thus completing the sealing ring replacement operation.

[0036] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high-flow-rate shut-off valve, comprising an inlet pipe (1) and an outlet pipe (2), characterized in that, The top of the water inlet pipe (1) is provided with an external threaded pipe (5), and the outer wall of the external threaded pipe (5) is threadedly connected to a limit assembly (3). The top of the limit assembly (3) is provided with a valve assembly (4), and the bottom of the valve assembly (4) is sleeved with a base plate (6). The limit assembly (3) is used at least for limiting and fixing the valve assembly (4), and the valve assembly (4) is used at least for opening and closing the fluid. The limiting component (3) includes a limiting cover (31) and a fixing block (32), wherein the limiting cover (31) is threadedly engaged with the external threaded pipe (5).

2. The high-flow-rate shut-off valve according to claim 1, characterized in that, The valve assembly (4) includes a handwheel (41), a connecting rod (42) is provided at the bottom of the handwheel (41), a gasket (43) is provided at the bottom of the connecting rod (42), a lead screw (44) is provided at the bottom of the gasket (43), a cover plate (45) is provided at the bottom of the lead screw (44), and a sealing ring (46) is provided on the inner wall of the cover plate (45).

3. A high-flow-rate shut-off valve according to claim 2, characterized in that, The fixing block (32) has an internal thread, and the lead screw (44) is threadedly connected to the fixing block (32) through the internal thread.

4. A high-flow-rate shut-off valve according to claim 3, characterized in that, The fixing block (32) and the limiting cover (31) are integrally formed, and the outer diameter of the fixing block (32) is smaller than the outer diameter of the limiting cover (31).

5. A high-flow-rate shut-off valve according to claim 1, characterized in that, The top of the base plate (6) is provided with a positioning protrusion, which is fitted into the cover plate (45).

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