Pressure relief gate valve

Abstract

The utility model discloses a pressure relief gate valve which comprises a valve body, a valve seat and a valve rod arranged in the valve body, a water inlet channel and a water outlet channel are arranged in the valve body in the radial direction, the valve rod is connected with a gate plate which is matched with the valve seat in a sealing mode, a T-shaped seat is arranged in the gate plate, one end of the T-shaped seat is clamped in the gate plate, and the other end of the T-shaped seat is clamped in the gate plate. One end of the gate plate is in threaded connection with the T-shaped seat, the other end of the gate plate is in threaded connection with the valve rod, the side, facing the T-shaped seat, of the gate plate is provided with a limiting protruding part in a bent and extending mode, an elastic assembly is arranged between the limiting protruding part and the T-shaped seat, the T-shaped seat is sleeved with the elastic assembly, and one end of the elastic assembly is arranged on one side of the limiting protruding part in a pressed mode. And the buffering function can be achieved when the valve rod controls the flashboard to ascend and descend, and the effect of improving the structural stability is achieved.

Description

Technical Field

[0001] This utility model relates to the field of valves, specifically to a pressure relief gate valve. Background Technology

[0002] A gate valve is a type of valve with a gate as its opening and closing element. The gate moves in a direction perpendicular to the direction of the fluid. Gate valves can only be fully open or fully closed; they cannot be used for regulation or throttling. Gate valves are sealed by the valve seat contacting the gate. Usually, metal materials are installed on the sealing surface to increase wear resistance. The opening and closing of the gate valve is driven by the raising and lowering of the valve stem. However, in existing gate valves, the valve stem is mostly made as a single piece, which can easily cause structural damage due to vibration when the valve stem is raised and lowered. Utility Model Content

[0003] To address the aforementioned problems, this utility model proposes a pressure-relieving gate valve that can act as a buffer when the valve stem controls the raising and lowering of the gate, thereby improving structural stability.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a pressure relief gate valve, comprising a valve body, a valve seat, and a valve stem disposed inside the valve body. The valve body has a radially opened inlet channel and an outlet channel. A gate plate is connected to the valve stem to form a sealing fit with the valve seat. A T-shaped seat is disposed inside the gate plate. One end of the T-shaped seat is clamped inside the gate plate, and the other end is threaded to the valve stem. The gate plate is bent and extended toward the T-shaped seat to provide a limiting protrusion. An elastic component is disposed between the limiting protrusion and the T-shaped seat. The elastic component is sleeved on the T-shaped seat and one end is pressed against the limiting protrusion.

[0005] By adopting the above technical solution, the T-shaped seat can form a connection between the gate and the valve stem. When the valve stem drives the gate to rise, the elastic component is compressed and deformed by the pressure towards the limiting protrusion, forming a stable upward movement of the gate and realizing the connection between the inlet channel and the outlet channel. When the valve body is closed, the valve stem moves downward, the T-shaped seat squeezes the gate valve downward to realize displacement, the elastic component resets, and plays a role in relieving pressure when the gate descends, realizing the blocking of the inlet channel and the outlet channel. It can play a buffering role when the valve stem controls the gate to rise and fall, and has the effect of improving structural stability.

[0006] The present invention is further configured such that: a mounting groove is provided in the gate plate near the valve stem; a mounting opening is provided in the mounting groove at one end facing the valve stem; a threaded inner wall is provided in the valve stem that communicates with the mounting opening; a support platform and a positioning part are provided on the T-shaped seat; the support platform is clamped in the mounting groove; one end of the positioning part is connected to the support platform; and the other end passes through the mounting opening and is located in the threaded inner wall.

[0007] By adopting the above technical solution, the positioning part is connected to the valve stem through the threaded inner wall, which enables the valve stem to drive the gate to rise and fall. The support platform, together with the limiting protrusion, can limit the stroke of the gate and provide space for the deformation of the elastic component, so as to achieve a buffering effect when the valve stem controls the rise and fall of the gate.

[0008] The present invention is further configured such that the positioning part is provided with a thread on the side facing the inner wall of the thread, and the positioning part is provided in the inner wall of the thread through a threaded connection.

[0009] By adopting the above technical solution, the positioning part achieves a tight connection between the T-shaped seat and the valve stem through threads, further improving the stability of the structure.

[0010] The present invention is further configured such that the elastic component includes a spring and a washer, the spring is sleeved on the positioning part, one end of the spring is pressed against one side of the limiting protrusion, and the other end is pressed against the support platform, and the washer is sleeved on the outer peripheral surface of the support platform.

[0011] By adopting the above technical solution, the spring can form a buffer effect when the valve stem controls the raising and lowering of the gate valve through the telescopic cooperation with the T-shaped seat, and the washer can reduce the wear between the structures.

[0012] The present invention is further configured such that a first mounting hole is laterally opened on the positioning part, a second mounting hole is opened on the valve stem and communicates with the first mounting hole, and a pin is provided on the valve stem. The pin passes through the second mounting hole and the first mounting hole in sequence and clamps the positioning part in the inner wall of the thread.

[0013] By adopting the above technical solution, the pin can form a connection and fixation function between the positioning part and the valve stem, thus preventing the T-shaped seat from falling off.

[0014] The present invention is further provided that the limiting protrusion has a rounded surface on the side facing the positioning part.

[0015] The above technical solution can avoid structural interference between the limiting protrusion and the positioning part. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is an enlarged schematic diagram of utility model A.

[0018] In the diagram: 1. Valve body; 2. Valve seat; 3. Valve stem; 4. Inlet channel; 5. Outlet channel; 8. Gate; 9. T-shaped seat; 10. Mounting groove; 11. Mounting opening; 12. Threaded inner wall; 13. Limiting protrusion; 14. Elastic assembly; 15. Support platform; 16. Positioning part; 17. Spring; 18. Washer; 19. Thread; 20. First mounting hole; 21. Second mounting hole; 23. Pin; 24. Rounded surface. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example: As attached Figures 1-2 The pressure relief gate valve shown includes a valve body 1, a valve seat 2, and a valve stem 3 disposed inside the valve body 1. The valve body 1 has a radially formed inlet channel 4 and an outlet channel 5. A gate plate 8, which forms a sealing fit with the valve seat 2, is connected to the valve stem 3. A T-shaped seat 9 is disposed inside the gate plate 8. One end of the T-shaped seat 9 is clamped inside the gate plate 8, and the other end is threaded 19 to the valve stem 3. The gate plate 8 is bent and extended towards the T-shaped seat 9, providing a limiting protrusion 13 (an integral structure). An elastic component 14 is disposed between the limiting protrusion and the T-shaped seat 9, and the elastic component 14 is sleeved on the T-shaped seat 9 with one end pressed tightly. Located on one side of the limiting protrusion 13, the T-shaped seat 9 can form a connection between the gate 8 and the valve stem 3. When the valve stem 3 drives the gate 8 to rise, the elastic component 14 is compressed and deformed by the pressure towards the limiting protrusion 13, forming a stable upward movement of the gate 8, realizing the connection between the water inlet channel 4 and the water outlet channel 5. When the valve body 1 is closed, the valve stem 3 moves downward, the T-shaped seat 9 squeezes the gate valve downward to realize displacement, and the elastic component 14 resets, playing a role in relieving pressure when the gate 8 descends, realizing the blocking of the water inlet channel 4 and the water outlet channel 5. It can play a buffering role when the valve stem 3 controls the gate 8 to rise and fall, and has the effect of improving structural stability.

[0021] As attached Figure 2As shown, the gate plate 8 has an installation groove 10 on the side near the valve stem 3. The installation groove 10 has an installation opening 11 at the end facing the valve stem 3. The valve stem 3 has a threaded inner wall 12 that communicates with the installation opening 11. The T-shaped seat 9 is provided with a support platform 15 and a positioning part 16 (which are an integral structure). The support platform 15 is clamped in the installation groove 10. One end of the positioning part 16 is connected to the support platform 15, and the other end passes through the installation opening 11 and is set in the threaded inner wall 12. The positioning part 16 is connected to the valve stem 3 through the threaded inner wall 12, which allows the valve stem 3 to drive the gate plate 8 to rise and fall. The support platform 15, together with the limiting protrusion 13, can limit the stroke of the gate plate 8 and provide space for the deformation of the elastic component 14, so as to achieve a buffering effect when the valve stem 3 controls the rise and fall of the gate plate 8.

[0022] As attached Figure 2 As shown, the positioning part 16 is provided with a thread 19 (which is an integral structure) on the side facing the inner thread wall 12. The positioning part 16 is connected to the inner thread wall 12 through the thread 19. The positioning part 16 achieves a tight connection between the T-shaped seat 9 and the valve stem 3 through the thread 19, which further improves the stability of the structure.

[0023] As attached Figure 1 and attached Figure 2 As shown, the elastic component 14 includes a spring 17 and a washer 18 (specifically made of rubber). The spring 17 is sleeved on the positioning part 16. One end of the spring 17 is pressed against one side of the limiting protrusion 13, and the other end is pressed against the support platform 15. The washer 18 is sleeved on the outer circumferential surface of the support platform 15. The spring 17 can form a buffering effect when the valve stem 3 controls the raising and lowering of the gate valve through the telescopic cooperation with the T-shaped seat 9. The washer 18 can reduce the wear between the structures.

[0024] As attached Figure 2 As shown, the positioning part 16 has a first mounting hole 20 opened laterally, and the valve stem 3 has a second mounting hole 21 that communicates with the first mounting hole 20. The valve stem 3 is provided with a pin 23, which passes through the second mounting hole 21 and the first mounting hole 20 in sequence and clamps the positioning part 16 into the threaded inner wall 12. The pin 23 can form a connection and fixation function of the positioning part 16 on the valve stem 3, so as to prevent the T-shaped seat 9 from falling off.

[0025] As attached Figure 2 As shown, the limiting protrusion 13 is provided with a rounded surface 24 (which is an integral structure) on the side facing the positioning part 16. The rounded surface 24 can prevent structural interference between the limiting protrusion 13 and the positioning part 16.

[0026] In this utility model, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of the structural relationship between the various components or elements of this utility model and do not specifically refer to any component or element in this utility model. They should not be construed as limiting this utility model.

Claims

1. A pressure relief gate valve, comprising a valve body (1), a valve seat (2), and a valve stem (3) disposed inside the valve body (1), wherein the valve body (1) is radially provided with an inlet channel (4) and an outlet channel (5), and a gate plate (8) is connected to the valve stem (3) to form a sealing fit with the valve seat (2), characterized in that: A T-shaped seat (9) is provided inside the gate (8). One end of the T-shaped seat (9) is clamped inside the gate (8), and the other end is threaded to the valve stem (3). The gate (8) is bent and extended toward the T-shaped seat (9) and a limiting protrusion (13) is provided. An elastic component (14) is provided between the limiting protrusion (13) and the T-shaped seat (9). The elastic component (14) is sleeved on the T-shaped seat (9) and one end is pressed against the limiting protrusion (13) on one side.

2. A pressure relief gate valve according to claim 1, characterized in that: The gate (8) has an installation groove (10) on the side near the valve stem (3). The installation groove (10) has an installation opening (11) at the end facing the valve stem (3). The valve stem (3) has a threaded inner wall (12) that communicates with the installation opening (11). The T-shaped seat (9) is provided with a support platform (15) and a positioning part (16). The support platform (15) is clamped in the installation groove (10). One end of the positioning part (16) is connected to the support platform (15), and the other end passes through the installation opening (11) and is located in the threaded inner wall (12).

3. A pressure relief gate valve according to claim 2, characterized in that: The positioning part (16) is provided with a thread (19) facing the inner wall (12), and the positioning part (16) is connected to the inner wall (12) through the thread (19).

4. A pressure relief gate valve according to claim 1, characterized in that: The elastic component (14) includes a spring (17) and a washer (18). The spring (17) is sleeved on the positioning part (16). One end of the spring (17) is pressed against one side of the limiting protrusion (13), and the other end is pressed against the support platform (15). The washer (18) is sleeved on the outer peripheral surface of the support platform (15).

5. A pressure relief gate valve according to claim 4, characterized in that: The positioning part (16) has a first mounting hole (20) opened laterally, and the valve stem (3) has a second mounting hole (21) connected to the first mounting hole (20). The valve stem (3) is provided with a pin (23), which passes through the second mounting hole (21) and the first mounting hole (20) in sequence and clamps the positioning part (16) in the threaded inner wall (12).

6. A pressure relief gate valve according to claim 1, characterized in that: The limiting protrusion (13) has a rounded surface (24) on the side facing the positioning part (16).

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