Gate valve with long service life

Abstract

The utility model relates to the technical field of gate valves, and discloses a gate valve with long service life, which comprises a water pipe, the top of the water pipe is fixedly connected with a top cover, the top of the top cover is rotatably connected with a handle, the bottom of the handle is fixedly connected with a rotating disc, and the outer wall of the rotating disc is fixedly connected with a rack. Screw rods are rotatably connected to the two sides of the interior of the top cover, gears are fixedly connected to the tops of the screw rods, the gears are meshed with the outer walls of the racks, moving blocks are in threaded connection to the outer walls of the screw rods, flashboards are fixedly connected to the interiors of the moving blocks, and mounting holes in a rectangular array are formed in the moving blocks; the outer wall of the gate plate is slidably connected to the interior of the water pipe. In the utility model, the gear drives the screw rod, and the screw rod drives the moving block to descend, so that the lifting of the flashboard can be controlled, the problem that the flashboard is easy to damage due to reduced impact resistance caused by the damage of the internal structure of the flashboard when the flashboard is directly driven is solved, and the service life of the flashboard is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of gate valves, in particular to a gate valve with a long service life. Background Art

[0002] A gate valve is an opening and closing component, the movement direction of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate valve is sealed by the contact between the valve seat and the gate. Usually the sealing surface will be welded with metal materials to increase wear resistance, such as cladding, stainless steel, etc. The gate plates are rigid gate plates and elastic gate plates. Depending on the gate plates, gate valves are divided into rigid gate valves and elastic gate valves.

[0003] The gate usually has a hole or slot that matches the valve stem, through which the valve stem is connected to the gate. A threaded rod is a common connection method that can drive the movement of the valve stem and gate by rotation. The threads on the threaded rod match the hole or slot on the gate, so that the rotation of the valve stem can drive the gate up and down.

[0004] However, since the threaded rod is directly connected to the inside of the gate plate, and the material and precision of the gate plate are high, its processing cost is high, so avoiding the wear of the gate plate can effectively reduce its replacement cost. At the same time, the gate plate is contacted by the threaded rod, and its interior needs to be hollowed out, which will reduce its pressure resistance when blocking the water flow, thereby reducing its service life. Therefore, a gate valve with a long service life is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a gate valve with a long service life, aiming to improve the problem in the prior art that the gate plate and the threaded rod are in direct contact, which will increase the wear between the two and reduce its impact resistance, thereby shortening the service life.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A gate valve with a long service life, comprising a water pipe, a top cover fixedly connected to the top of the water pipe, a handle rotatably connected to the top of the top cover, a rotating disk fixedly connected to the bottom of the handle, a rack fixedly connected to the outer wall of the rotating disk, screw rods rotatably connected to both sides of the top cover, a gear fixedly connected to the top of the screw rod, the gear meshes with the outer wall of the rack, a moving block threadedly connected to the outer wall of the screw rod, a gate plate fixedly connected to the inside of the moving block, a rectangular array of mounting holes arranged inside the moving block, the outer wall of the gate plate slidably connected to the inside of the water pipe, and a sealing component arranged inside the water pipe;

[0008] As a further description of the above technical solution:

[0009] The sealing assembly comprises a sealing ring, the outer wall of which is fixedly connected to the inner wall of the water pipe;

[0010] As a further description of the above technical solution:

[0011] Flanges are fixedly connected to both sides of the outer wall of the water pipe;

[0012] As a further description of the above technical solution:

[0013] The inner wall of the top cover is threadedly connected with a threaded column, the bottom of the top cover is fixedly connected with a circular array of mounting columns, and the water pipe is provided with a circular array of slots;

[0014] As a further description of the above technical solution:

[0015] One end of the threaded column is fixedly connected to a driving block, and the other end of the threaded column is rotatably connected to a wedge-shaped sliding rod 1, and the outer wall of the wedge-shaped sliding rod 1 is slidably connected to the inside of the top cover;

[0016] As a further description of the above technical solution:

[0017] A second wedge-shaped slide bar is slidably connected inside the mounting column, and a limiting groove is provided on one side inside the second wedge-shaped slide bar;

[0018] As a further description of the above technical solution:

[0019] Clamps are rotatably connected to both sides of the mounting column, and a spring is provided at one end of the wedge-shaped sliding rod;

[0020] As a further description of the above technical solution:

[0021] One end of the spring is fixedly connected to the inner wall of the mounting column, and the other end of the spring is fixedly connected to one end of the wedge-shaped sliding rod.

[0022] The utility model has the following beneficial effects:

[0023] 1. In the utility model, the gate is first fixed by a moving block, and then the handle drives the rotating disk, the rack on the outer wall of the rotating disk drives the gear, the gear drives the screw rod, and the moving block is driven down by the screw rod, so that the lifting and lowering of the gate can be controlled, which solves the problem that the gate is directly driven and the internal structure of the gate is damaged, resulting in reduced impact resistance and easy damage of the gate, and improves the service life of the gate.

[0024] 2. In the utility model, the threaded column is first driven by the driving block, and the threaded column will push the wedge-shaped slide bar 1, and the wedge-shaped slide bar 1 will push the wedge-shaped slide bar 2, and the limiting groove inside the wedge-shaped slide bar 2 will push the clamping plate to rotate, and the clamping plate will be pressed tightly inside the slot, which solves the problem that it is easy to be removed due to rust when fixed by bolts, and improves the convenience of installing the water pipe and the top cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A three-dimensional schematic diagram of a gate valve with a long service life proposed by the utility model;

[0026] Figure 2 This is a schematic diagram of the cross-sectional structure of a water pipe of a gate valve with a long service life proposed by the utility model;

[0027] Figure 3 This is a schematic diagram of the cross-sectional structure of a top cover of a gate valve with a long service life proposed by the utility model;

[0028] Figure 4 This is a schematic diagram of the cross-sectional structure of an installation column of a gate valve with a long service life proposed by the utility model;

[0029] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0030] Legend:

[0031] 1. Water pipe; 2. Flange; 3. Top cover; 4. Handle; 5. Rotating plate; 6. Rack; 7. Gate; 8. Gear; 9. Screw; 10. Moving block; 11. Mounting hole; 12. Sealing ring; 13. Slot; 14. Wedge slide bar 1; 15. Driving block; 16. Threaded column; 17. Wedge slide bar 2; 18. Spring; 19. Limiting groove; 20. Clamp; 21. Mounting column. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Reference Figure 1 - Figure 3, the utility model provides an embodiment: a gate valve with a long service life, including a water pipe 1, a top cover 3 is fixedly connected to the top of the water pipe 1, a handle 4 is rotatably connected to the top of the top cover 3, a rotating disk 5 is fixedly connected to the bottom of the handle 4, a rack 6 is fixedly connected to the outer wall of the rotating disk 5, both sides of the top cover 3 are rotatably connected to the screw rod 9, a gear 8 is fixedly connected to the top of the screw rod 9, the gear 8 is meshed with the outer wall of the rack 6, a moving block 10 is threadedly connected to the outer wall of the screw rod 9, a gate plate 7 is fixedly connected to the inside of the moving block 10, a rectangular array of mounting holes 11 is arranged inside the moving block 10, the outer wall of the gate plate 7 is slidably connected to the inside of the water pipe 1, a sealing assembly is arranged inside the water pipe 1, the sealing assembly includes a sealing ring 12, and the outer wall of the sealing ring 12 is fixedly connected to the inner wall of the water pipe 1;

[0034] Specifically, by setting a mounting hole 11 on the gate plate 7, the gate plate 7 can be fixedly mounted on the moving block 10. This connection method is more stable and reliable, and avoids the problem of damage or falling off of the gate plate 7 during use. The gate plate 7 is mounted on the moving block 10 that can move up and down, and the opening and closing action of the gate plate 7 can be better controlled, and the flexibility and accuracy of the operation are improved. By turning the handle 4), the rotating disk 5 can be driven to rotate, and the rack 6 on the outer wall of the rotating disk 5 will drive the gears 8 on both sides to rotate, and the rotation of the gear 8 will drive the screw rod 9 to rotate, and the rotation of the screw rod 9 will drive The moving block 10 moves up and down. The up and down movement of the moving block 10 can control the gate plate 7 installed thereon to perform opening and closing operations, thereby realizing the opening and closing of the pipeline. The gate valve adopts a separation design of the moving block 10 and the gate plate 7, thereby avoiding the force directly acting on the gate plate 7 and effectively preventing the damage of the gate plate 7. By turning the handle 4 to drive the mechanical transmission of the gear 8 and the screw rod 9, the opening and closing position of the gate plate 7 can be accurately controlled, and the operation is more flexible and reliable. The design makes full use of the advantages of mechanical transmission, realizes the precise control of the gate plate 7, and also improves the service life and reliability.

[0035] Reference Figure 1 and Figure 4 , flanges 2 are fixedly connected to both sides of the outer wall of the water pipe 1;

[0036] Specifically, a flange 2 is provided on the water pipe 1 for connection. The flange 2 connection has high rigidity and can withstand large forces and torques. It can provide a stable connection and ensure the sealing and safety of the connection parts.

[0037] Reference Figure 4 and Figure 5, the inner wall of the top cover 3 is threadedly connected with a threaded column 16, the bottom of the top cover 3 is fixedly connected with a mounting column 21 of an annular array, a groove 13 of an annular array is provided inside the water pipe 1, one end of the threaded column 16 is fixedly connected with a driving block 15, and the other end of the threaded column 16 is rotatably connected with a wedge-shaped slide bar 14, the outer wall of the wedge-shaped slide bar 14 is slidably connected to the inside of the top cover 3, and a wedge-shaped slide bar 2 17 is slidably connected inside the mounting column 21, a limiting groove 19 is provided on one side of the inside of the wedge-shaped slide bar 2 17, and clamping plates 20 are rotatably connected on both sides of the inside of the mounting column 21, a spring 18 is provided at one end of the wedge-shaped slide bar 2 17, one end of the spring 18 is fixedly connected to the inner wall of the mounting column 21, and the other end of the spring 18 is fixedly connected to one end of the wedge-shaped slide bar 2 17;

[0038] Specifically, when the top cover 3 is fixed on the water pipe 1, the mounting column 21 at the bottom of the top cover 3 will be inserted into the slot 13, and the threaded column 16 will be controlled to rotate by the driving block 15. The rotation of the threaded column 16 will push the wedge-shaped slide bar 14 to slide inward, and the sliding of the wedge-shaped slide bar 14 will drive the wedge-shaped slide bar 2 17 to push outward. The limiting groove 19 inside the wedge-shaped slide bar 27 will push one side of the clamping plate 20. The clamping plate 20 will rotate on the mounting column 21 under the push of the limiting groove 19, and the other side of the clamping plate 20 The inner wall of the card slot 13 will be compressed, so that a fixed connection between the top cover 3 and the water pipe 1 can be achieved. Through a simple operation of the driving block 15, a quick and reliable connection between the top cover 3 and the water pipe 1 can be achieved. The rotation of the clamping plate 20 on the mounting column 21 can better adapt to water pipes 1 of different sizes and shapes, thereby improving versatility and adaptability. The method of compressing the inner wall of the card slot 13 can ensure the sealing and stability between the top cover 3 and the water pipe 1, and avoid the occurrence of problems such as leakage.

[0039] Working principle: In the gate valve, the gate plate 7 can be installed on the moving block 10 through the mounting hole 11, and the moving block 10 can control the movement of the gate plate 7, thereby avoiding damage to the gate plate 7. When controlling the movement of the gate plate 7, the rotating disk 5 can be rotated by the handle 4, and the rack 6 on the outer wall of the rotating disk 5 will drive the gears 8 on both sides, so that the gear 8 drives the screw rod 9 to rotate. Under the rotation of the screw rod 9, the moving block 10 can be controlled to rise and fall, and the opening and closing of the gate plate 7 can be controlled. When the top cover 3 is fixed to the water pipe 1, the mounting column 21 at the bottom of the top cover 3 can be inserted into the slot 13, and the driving block 15 controls the threaded column 16 to rotate, then the threaded column 16 will push the wedge-shaped slide bar 14 to slide inward, and the wedge-shaped slide bar 14 will slide, and the wedge-shaped slide bar 2 will be pushed outward, and the limiting groove 19 inside the wedge-shaped slide bar 2 will push one side of the clamping plate 20, so that the clamping plate 20 rotates on the mounting column 21, and the other side of the clamping plate 20 will press the inner wall of the slot 13, so that the top cover 3 is fixed on the water pipe 1.

[0040] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gate valve with a long service life, comprising a water pipe (1), characterized in that: The top of the water pipe (1) is fixedly connected to a top cover (3), the top of the top cover (3) is rotatably connected to a handle (4), the bottom of the handle (4) is fixedly connected to a rotating disk (5), the outer wall of the rotating disk (5) is fixedly connected to a rack (6), both sides of the top cover (3) are rotatably connected to screw rods (9), the top of the screw rod (9) is fixedly connected to a gear (8), the gear (8) is meshed with the outer wall of the rack (6), the outer wall of the screw rod (9) is threadedly connected to a moving block (10), the inside of the moving block (10) is fixedly connected to a gate plate (7), a rectangular array of mounting holes (11) is provided inside the moving block (10), the outer wall of the gate plate (7) is slidably connected to the inside of the water pipe (1), and a sealing component is provided inside the water pipe (1).

2. A gate valve with a long service life according to claim 1, characterized in that: The sealing assembly comprises a sealing ring (12), the outer wall of the sealing ring (12) being fixedly connected to the inner wall of the water pipe (1).

3. A gate valve with a long service life according to claim 1, characterized in that: Flange plates (2) are fixedly connected to both sides of the outer wall of the water pipe (1).

4. A gate valve with a long service life according to claim 1, characterized in that: The inner wall of the top cover (3) is threadedly connected with a threaded column (16), the bottom of the top cover (3) is fixedly connected with a circular array of mounting columns (21), and the water pipe (1) is provided with a circular array of card slots (13) inside.

5. A gate valve with a long service life according to claim 4, characterized in that: One end of the threaded column (16) is fixedly connected to a driving block (15), and the other end of the threaded column (16) is rotatably connected to a wedge-shaped sliding rod (14), and the outer wall of the wedge-shaped sliding rod (14) is slidably connected to the inside of the top cover (3).

6. A gate valve with a long service life according to claim 5, characterized in that: A second wedge-shaped slide bar (17) is slidably connected inside the mounting column (21), and a limiting groove (19) is provided on one side inside the second wedge-shaped slide bar (17).

7. A gate valve with a long service life according to claim 6, characterized in that: Clamps (20) are rotatably connected to both sides of the installation column (21), and a spring (18) is arranged at one end of the second wedge-shaped slide rod (17).

8. A gate valve with a long service life according to claim 7, characterized in that: One end of the spring (18) is fixedly connected to the inner wall of the mounting column (21), and the other end of the spring (18) is fixedly connected to one end of the wedge-shaped sliding rod (17).

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