Gate valve
By introducing a pressure relief orifice and a sealed piston structure into the gate valve, combined with a spring and adjusting rod system, automatic pressure relief is achieved, solving the problem of gate valve damage under high pressure, improving safety and adaptability, and reducing accident risks and replacement costs.
Patent Information
- Application Number
- CN202520120933.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-18
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-01-18
AI Technical Summary
The lack of an automatic pressure protection mechanism in existing gate valves makes them prone to damage or bursting when the pressure of the medium in the pipeline rises abnormally, affecting production safety and stability.
A gate valve structure with a pressure relief orifice and a sealing piston was designed. It automatically relieves pressure when the medium pressure is abnormal by using a spring and adjusting rod system, and the pressure relief threshold can be adjusted by the operating panel to achieve intelligent pressure protection.
It effectively prevents gate valves from being damaged by overpressure, ensures the safe and stable operation of pipeline systems, broadens the scope of application, and reduces the risk of safety accidents and equipment replacement costs.
Smart Images
Figure CN223677059U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of valve, specifically is a gate valve. BACKGROUND
[0002] Gate valve is an important valve, its main function is to cut off or connect the fluid in the pipeline, in the working process, through rotating hand wheel to control the lifting of the gate, thereby realizing the opening or closing of the fluid passage, and is widely applied in various industrial and civil fields requiring fluid control, such as water treatment, oil transportation etc.
[0003] The existing gate valve is mainly composed of the following parts: valve body, valve cover, valve stem, gate plate and hand wheel etc., the valve body is the main body, contains the medium channel, the valve cover plays the sealing role, the valve stem connects the hand wheel and the gate plate, and rotates the hand wheel into the linear motion of the gate plate, the gate plate is used to cut off or conduct the medium, when working, clockwise rotating hand wheel, the gate plate drops to cut off the medium, and anticlockwise rotating hand wheel, the gate plate rises to make the medium pass.
[0004] The existing gate valve in the prior art has the following defects: the conventional gate valve lacks effective automatic pressure protection mechanism, when the medium pressure in the pipeline abnormally rises, it cannot automatically release pressure in time, which leads to the damage of the gate valve when it bears too high pressure, even the serious accident of burst, causes the collapse of the whole pipeline system, and further forms a great threat to the production safety, seriously affects the continuity and stability of production, increases the risk of safety accidents, brings huge economic loss and potential personnel casualty risk to the enterprise, therefore, a gate valve is proposed aiming at the above problems. CONTENT OF UTILITY MODEL
[0005] In order to make up for the deficiency of the existing gate valve, a gate valve is proposed.
[0006] The utility model discloses a technical scheme that solves its technical problem is adopted: a gate valve, including the valve body, the valve cover is fixedly assembled on the valve body, the valve seat is fixedly assembled in the valve body, the valve rod is threadedly connected with the main shaft bushing on the valve cover, the gate is movably arranged in the valve body, the bottom end of the valve rod is rotatably connected with the gate, the packing sleeve is assembled at the valve rod connecting portion on the valve cover, the hand wheel for operating the up and down movement of the valve rod is fixedly sleeved on the main shaft bushing, the cylindrical groove is formed on one side of the gate in the medium entering direction, the sealing piston is movably arranged at the inlet of the cylindrical groove inner wall, the limiting ring that cooperates with the sealing piston is fixedly arranged at the inlet of the cylindrical groove on the gate, the movable block is movably arranged in the cylindrical groove, the spring is arranged between the movable block and the sealing piston, the active slot is formed in the inner wall of the cylindrical groove below the valve rod, the movable block is movably arranged in the active slot, the driving surface for driving the movable block to move is arranged on the movable block, the adjusting rod for driving the movable block to move is rotatably arranged in the valve rod through the threaded connection, the top end of the adjusting rod extends out of the top end of the valve rod, the bottom end of the movable rod extends into the active slot and is rotatably connected to the top end of the movable block, the pressure relief through hole is formed in the inner wall of the cylindrical groove close to the inlet, and the other end of the pressure relief through hole is communicated with the other side of the gate.
[0007] Preferably, the contact surface of the movable block and the driving surface is provided with an arc chamfer.
[0008] Preferably, the top end of the adjusting rod is fixedly provided with an operation disc.
[0009] Preferably, the two sides of the gate are fixedly provided with limiting guide rails, and the inside of the valve body is fixedly provided with limiting convex strips matched with the limiting guide rails.
[0010] The utility model discloses the beneficial effect:
[0011] 1. Excellent safety performance: the unique pressure protection structure can automatically release pressure when the pipeline medium pressure abnormally rises, effectively preventing the gate valve from being damaged or bursting due to overpressure, providing a solid guarantee for the safe and stable operation of the entire pipeline system, and greatly reducing the risk of safety accidents;
[0012] 2. Strong working condition adaptability: adjustable pressure relief pressure setting makes the gate valve easily cope with various working condition requirements in different industrial scenes, whether facing different medium characteristics or various working pressures, can accurately match the corresponding pressure relief pressure threshold through simple operation, greatly widening the application range of the gate valve and reducing the cost of frequent equipment replacement due to working condition changes. ACCURACY
[0013] The drawings described herein are used to provide further understanding of the present application, constitute a part of the present application, the schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:
[0014] Fig. 1 is a structural sectional view of the whole of the present application;
[0015] Fig. 2 is a perspective view of the whole of the present application;
[0016] Fig. 3 is a sectional view of the valve body and the valve seat of the present application;
[0017] Legend:
[0018] 1, valve body; 2, valve cover; 3, valve seat; 4, main shaft bushing; 5, valve rod; 6, gate plate; 7, packing pressing sleeve; 8, hand wheel; 9, cylindrical groove; 10, sealing piston; 11, limiting ring; 12, moving block; 13, spring; 14, movable groove; 15, movable block; 16, driving surface; 17, adjusting rod; 18, pressure relief through hole; 19, operation disc; 20, limiting guide rail; 21, limiting convex strip. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0020] Specific embodiments are given below.
[0021] Please refer to Figs. 1-3The utility model discloses a gate valve, including the valve body 1, the valve cover 2 is fixedly assembled on the valve body 1, the valve seat 3 is fixedly assembled in the valve body 1, the valve stem 5 is threadedly connected with the valve cover 2 through the main shaft bushing 4 on the valve cover 2, the gate 6 is movably arranged in the valve body 1, the bottom of valve stem 5 is rotatably connected with the gate 6, the packing pressure sleeve 7 is assembled in the valve cover 2 and is connected with the valve stem 5, the hand wheel 8 for operating the up and down movement of valve stem 5 is fixedly sleeved on the main shaft bushing 4, the cylindrical groove 9 is set up on the one side of the gate 6 and is located the medium entering direction, the sealing piston 10 is movably arranged at the entrance of the inner wall of cylindrical groove 9, the limiting ring 11 that cooperates with sealing piston 10 is fixedly arranged at the entrance of cylindrical groove 9 on the gate 6, the movable block 12 is movably arranged in the cylindrical groove 9, the spring 13 is terminated between movable block 12 and sealing piston 10, the movable slot 14 is seted up in the inner wall of cylindrical groove 9 and is located the just below of valve stem 5, the movable block 15 is movably arranged in the movable slot 14, the driving surface 16 for driving movable block 12 to move is arranged on the movable block 15, the adjusting rod 17 for driving movable block 15 to move is rotatably arranged in the valve stem 5 through the threaded connection, the top of adjusting rod 17 extends the top of valve stem 5, the bottom of adjusting rod 17 extends to movable slot 14 and is rotatably connected in the top of movable block 15, the operating disc 19 is fixedly arranged at the top of adjusting rod 17, the pressure relief through -hole 18 is seted up at the inner wall of cylindrical groove 9 and is close to the entrance, the other end of pressure relief through -hole 18 is communicated with the other side of gate 6.In actual use, when the gate valve is in a closed state, the medium in the pipeline is blocked by the gate plate 6. Once the medium pressure in the pipeline abnormally rises, one side of the gate plate 6 will bear a large pressure. At this time, if the medium pressure exceeds the preset pressure value of the spring 13 behind the sealing piston 10, the sealing piston 10 will overcome the resistance of the spring 13 and displace towards the inside of the cylindrical groove 9. With the movement of the sealing piston 10, when it passes the position of the pressure relief hole 18, the high-pressure medium finds a pressure relief channel and flows to the other side of the gate plate 6 through the pressure relief hole 18, and is finally discharged from the outlet of the gate valve, thereby realizing the release of the excessive pressure in the pipeline, effectively avoiding damage to the gate valve due to bearing excessive pressure, and the triggering pressure value of the pressure relief can be flexibly adjusted according to the actual work scene requirements. The operator only needs to rotate the operation disc 19. The rotation of the operation disc 19 drives the synchronous rotation of the adjusting rod 17 fixedly connected thereto. Since the adjusting rod 17 is connected with the valve rod 5 through threads, this threaded transmission mode enables the adjusting rod 17 to accurately move up and down along the axial direction of the valve rod 5 while rotating. The bottom end of the adjusting rod 17 is rotationally connected with the movable block 15. Therefore, when the adjusting rod 17 moves downward, the movable block 15 also moves downward in the active groove 14. When the movable block 15 moves downward, the driving surface 16 contacts the moving block 12, converting the linear motion of the movable block 15 into a pushing force on the moving block 12, pushing the moving block 12 to move towards the entrance of the cylindrical groove 9. The movement of the moving block 12 further compresses the spring 13, increasing the spring force of the spring 13. Only when the medium pressure exceeds the higher pressure value set by the spring 13 at this time, the sealing piston 10 will move again, thereby triggering the pressure relief action, and the gate valve is endowed with an intelligent and reliable pressure protection mechanism. On the one hand, the automatic pressure relief function is like installing a solid "safety valve" for the gate valve, which can monitor and respond to abnormal pressure conditions in the pipeline in real time, fundamentally eliminating the safety hazards of gate valve damage or even burst due to excessive medium pressure, and effectively ensuring the safe and stable operation of the entire pipeline system. On the other hand, the adjustable pressure relief pressure setting greatly improves the adaptability and flexibility of the gate valve. Different industrial production scenes, different medium characteristics and different working pressure requirements can be adjusted by simply rotating the operation disc 19, so that the gate valve can accurately match the corresponding pressure relief pressure threshold, meet various actual application requirements, expand the use range of the gate valve, and reduce the cost of frequent equipment replacement due to changes in working conditions.
[0022] Further, the contact surface of the moving block 12 with the driving surface 16 is provided with an arc-shaped chamfer; during the process of adjusting the pressure of the adjusting spring 13, the interaction between the driving surface 16 of the movable block 15 and the moving block 12, the contact surface of the moving block 12 with the driving surface 16 is specially designed as an arc-shaped chamfer, when the movable block 15 moves downward under the driving of the adjusting rod 17, the driving surface 16 starts to contact with the moving block 12, due to the existence of the arc-shaped chamfer, the force of the driving surface 16 on the moving block 12 is not concentrated on a point, but gradually distributed along the profile of the arc-shaped chamfer, this unique contact mode makes the force acting process more smooth and continuous, avoiding the stress concentration phenomenon that may occur in the traditional plane contact, with the continuous downward movement of the movable block 15, the driving surface 16 constantly pushes the moving block 12 along the arc-shaped chamfer, efficiently converting the linear motion of the movable block 15 into the movement of the moving block 12 towards the entrance direction of the cylindrical groove 9, and then realizing the stable compression of the spring 13.
[0023] Further, the two sides of the gate plate 6 are fixedly provided with limiting guide rails 20, and the inside of the valve body 1 is fixedly provided with limiting convex strips 21 matched with the limiting guide rails 20; during the lifting movement of the gate plate 6, the limiting guide rails 20 fixedly arranged on the two sides of the gate plate 6 are tightly matched with the limiting convex strips 21 fixedly arranged in the inside of the valve body 1 to play a guiding role, when the gate valve is opened or closed, the rotary movement of the valve rod 5 is converted into the linear lifting movement of the gate plate 6 through the rotary connection with the gate plate 6, in this process, the limiting guide rails 20 always slide along the surface of the limiting convex strips 21, ensuring that the gate plate 6 can only stably and linearly lift in the vertical direction without any deviation, shaking or torsion and other abnormal conditions, ensuring the posture stability of the gate plate 6 during the movement process, improving the reliability and stability of the gate valve, which is an important basis for ensuring the long-term efficient operation of the gate valve.
[0024] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0025] The basic principles, main features and advantages of the present application have been shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.
Claims
1. A gate valve characterized by: The utility model relates to a valve, including valve body (1), the valve cover (2) is fixedly assembled on valve body (1), the valve seat (3) is fixedly assembled in valve body (1), the valve stem (5) is threadedly connected with the valve cover (2) through the main shaft bushing (4) on the valve cover (2), the shutter (6) is movably arranged in valve body (1), the bottom end of valve stem (5) is rotatably connected with shutter (6), the packing sleeve (7) is assembled on the valve cover (2) and is connected with valve stem (5), the hand wheel (8) for operating the up and down movement of valve stem (5) is fixedly sleeved on the main shaft bushing (4), the cylindrical groove (9) is formed on one side of shutter (6) and is located in the medium entering direction, the sealing piston (10) is movably arranged on the entrance of the inner wall of cylindrical groove (9), the limiting ring (11) is fixedly arranged on the shutter (6) and is located at the entrance of cylindrical groove (9) and is matched with sealing piston (10), the moving block (12) is movably arranged in cylindrical groove (9), the spring (13) is arranged between moving block (12) and sealing piston (10), the movable groove (14) is formed on the inner wall of cylindrical groove (9) and is located directly below valve stem (5), the movable block (15) is movably arranged in movable groove (14), the driving surface (16) for driving the movement of moving block (12) is arranged on movable block (15), the adjusting rod (17) for driving the movement of movable block (15) is rotatably arranged in valve stem (5) through threaded connection, the top end of adjusting rod (17) extends out of the top end of valve stem (5), the bottom end of adjusting rod (17) extends into movable groove (14) and is rotatably connected to the top end of movable block (15), the pressure relief through hole (18) is formed on the inner wall of cylindrical groove (9) and is located close to the entrance, the other end of pressure relief through hole (18) is communicated with the other side of shutter (6).
2. A gate valve according to claim 1, characterized in that: The contact surface of moving block (12) and driving surface (16) is provided with arc chamfer.
3. A gate valve according to claim 1, characterized in that: The top end of adjusting rod (17) is fixedly provided with operating disc (19).
4. A gate valve according to claim 1, characterized in that: The limiting guide rail (20) is fixedly arranged on both sides of shutter (6), and the limiting convex strip (21) is fixedly arranged in the inner portion of valve body (1) and is matched with limiting guide rail (20).