Leakage-proof gate valve with high sealing performance

Abstract

The utility model provides a leakproof gate valve with high leakproofness, which comprises a valve body, a valve cover, a valve neck, a first valve rod, a hand wheel, a valve plate, a second valve rod and a connecting flange, the valve cover is fixedly mounted at the top of the valve body, the valve neck is fixedly mounted at the top of the valve cover, and the first valve rod is rotatably mounted in the valve neck through a sealing bearing; the hand wheel is fixedly installed on the top of the first valve rod, and the valve plate is engaged with the bottom of the first valve rod through threads and installed in the valve body in a sliding mode. The second valve rod is rotationally mounted at the bottom of the valve body through a sealing bearing and is meshed with the bottom of the valve plate through threads; the connecting flanges are fixedly installed at the front end and the rear end of the valve body. Due to the arrangement of the valve plate and the second valve rod, the overall sealing performance is high, and the valve cannot be loosened due to mistaken touch.

Description

Technical Field

[0001] The utility model relates to the technical field of gate valves, in particular to a high-sealing anti-leakage gate valve. Background Technique

[0002] With the continuous development of industry and urban infrastructure, the requirements for fluid control and pipeline sealing performance are getting higher and higher. As a key fluid control device, the high-sealing anti-leakage gate valve plays an important role in industrial production, municipal engineering, environmental protection and other fields.

[0003] In the past few decades, valve technology has made remarkable progress, especially in terms of sealing performance. There are problems of leakage and loss in the traditional valve sealing design.

[0004] Therefore, it is very necessary to invent a high-sealing anti-leakage gate valve. Content of the Utility Model

[0005] In order to solve the above technical problems, the utility model provides a high-sealing anti-leakage gate valve to solve the problems that the existing gate valve structure still has poor overall sealing performance and is easy to cause valve loosening due to accidental touch. A high-sealing anti-leakage gate valve includes a valve body, a valve cover, a valve neck, a first valve stem, a handwheel, a valve plate, a second valve stem and a connecting flange, wherein: the valve cover is fixedly installed on the top of the valve body, and the valve neck is fixedly installed on the top of the valve cover. The first valve stem is rotatably installed inside the valve neck through a sealing bearing; the handwheel is fixedly installed on the top of the first valve stem, and the valve plate is threadedly engaged at the bottom of the first valve stem and slidably installed inside the valve body; the second valve stem is rotatably installed at the bottom of the valve body through a sealing bearing and is threadedly engaged at the bottom of the valve plate; the connecting flange is fixedly installed at the front and rear ends of the valve body.

[0006] The valve plate includes a support body, an extension seat, sliding blocks and a sealing gasket. The extension seat is fixedly installed on the top of the support body. The sliding blocks are fixedly installed on both sides of the support body and slidably installed inside the valve body; the sealing gasket is wrapped around the outside of the support body and has openings for the extension seat and the sliding blocks to give way.

[0007] The second valve stem includes a sealing bearing, a threaded rod and a force application seat. The sealing bearing is fixedly installed at the bottom of the valve body, and the threaded rod is fixedly installed inside the sealing bearing; the force application seat is fixedly installed at the bottom of the threaded rod.

[0008] The support inside the valve plate is a circular stainless-steel metal plate, and the extension seat is a metal block extending upward from the support. Threaded holes are provided through the support and the extension seat; the sliding block consists of a pair of mirror-image sliding protrusions, and the gasket is a rubber sealing ring; the threaded holes inside the support and the extension seat engage with the first valve stem and the second valve stem, and the first valve stem and the second valve stem inside the support and the extension seat contact but are not connected at their midline positions; the valve plate can move vertically by rotating the first valve stem, and has the following functions: ① Fluid control: The valve plate can open or close the valve by moving up and down, thereby controlling the fluid passage. When the valve plate moves down, the passage is closed, the valve is closed, and the fluid is prevented from passing through; when the valve plate moves up, the passage is opened, the valve is opened, and the fluid is allowed to pass through; ② Sealing function: When the valve plate is in the closed state, it cooperates with the sealing surface between the valve body to achieve a tight seal of the fluid, preventing fluid leakage. The sealing performance directly affects the use effect and safety of the valve.

[0009] The inner ring of the sealing bearing inside the second valve stem is fixedly connected to the threaded rod, and the outer ring of the sealing bearing inside the second valve stem is fixedly connected to the valve body; the thread on the outside of the threaded rod engages with the valve plate, and the force application seat is a metal part with a force application hole. The first valve stem and the second valve stem must rotate simultaneously to move the valve plate. When only one valve stem rotates, the thread on the surface of the other valve stem will catch the valve plate and prevent it from moving. The first valve stem and the second valve stem are linked, which can ensure that the valve plate moves smoothly during operation without jamming or out-of-sync situations, preventing the valve plate from loosening and causing leakage due to one of the valve stems being accidentally touched.

[0010] Compared with the prior art, the present utility model has the following beneficial effects:

[0011] 1. The setting of the valve plate of the present utility model has the following functions: ① Fluid control: The valve plate can open or close the valve by moving up and down, thereby controlling the fluid passage. When the valve plate moves down, the passage is closed, the valve is closed, and the fluid is prevented from passing through; when the valve plate moves up, the passage is opened, the valve is opened, and the fluid is allowed to pass through; ② Sealing function: When the valve plate is in the closed state, it cooperates with the sealing surface between the valve body to achieve a tight seal of the fluid, preventing fluid leakage. The sealing performance directly affects the use effect and safety of the valve.

[0012] 2. The setting of the second valve stem of the present utility model is such that the first valve stem and the second valve stem must rotate simultaneously to move the valve plate. When only one valve stem rotates, the thread on the surface of the other valve stem will catch the valve plate and prevent it from moving. The first valve stem and the second valve stem are linked, which can ensure that the valve plate moves smoothly during operation without jamming or out-of-sync situations, preventing the valve plate from loosening and causing leakage due to one of the valve stems being accidentally touched. Brief Description of the Drawings

[0013] Figure 1 is a schematic structural view of the present utility model.

[0014] Figure 2 is an enlarged view of part A of the present utility model.

[0015] Figure 3 is an enlarged view of part B of the present utility model.

[0016] In the figure:

[0017] valve body 1, valve cover 2, valve neck 3, first valve rod 4, handwheel 5, valve plate 6, support body 61, extension seat 62, sliding block 63, gasket 64, second valve rod 7, sealed bearing 71, threaded rod 72, force application seat 73, connecting flange 8. Detailed Description of the Preferred Embodiment

[0018] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0019] As shown in Figure 1 to Figure 3 shown.

[0020] A high-sealing leak-proof gate valve provided by the present utility model includes a valve body 1, a valve cover 2, a valve neck 3, a first valve rod 4, a handwheel 5, a valve plate 6, a second valve rod 7 and a connecting flange 8, wherein: the valve cover 2 is fixedly installed on the top of the valve body 1, and the valve neck 3 is fixedly installed on the top of the valve cover 2, and the first valve rod 4 is rotatably installed inside the valve neck 3 through a sealed bearing; the handwheel 5 is fixedly installed on the top of the first valve rod 4, and the valve plate 6 is threadedly engaged at the bottom of the first valve rod 4 and slidably installed inside the valve body 1; the second valve rod 7 is rotatably installed at the bottom of the valve body 1 through a sealed bearing and is threadedly engaged at the bottom of the valve plate 6; the connecting flange 8 is fixedly installed at the front and rear ends of the valve body 1.

[0021] The valve plate 6 includes a support body 61, an extension seat 62, a sliding block 63 and a gasket 64, and the extension seat 62 is fixedly installed on the top of the support body 61. The sliding block 63 is fixedly installed on both sides of the support body 61 and is slidably installed inside the valve body 1; the gasket 64 is wrapped around the outside of the support body 61 and has openings for the extension seat 62 and the sliding block 63 to pass through.

[0022] The second valve stem 7 includes a sealing bearing 71, a threaded rod 72 and a force - applying seat 73. The sealing bearing 71 is fixedly installed at the bottom of the valve body 1, and the threaded rod 72 is fixedly installed inside the sealing bearing 71; the force - applying seat 73 is fixedly installed at the bottom of the threaded rod 72.

[0023] A highly - sealed anti - leakage gate valve provided by the utility model,

[0024] 1. Valve structure design:

[0025] The valve mainly consists of the following components:

[0026] Valve body 1: As the main structure of the valve, it is responsible for accommodating other components and providing connections.

[0027] Valve cover 2: Fixed on the top of the valve body, used to close the valve.

[0028] Valve neck 3: Fixed on the top of the valve cover, providing a connection flange for the valve.

[0029] The first valve stem 4: Connected to the inside of the valve neck through a sealing bearing, used to control the movement of the valve plate.

[0030] Handwheel 5: Fixed on the top of the first valve stem, providing manual operation.

[0031] Valve plate 6: Connected to the bottom of the first valve stem through threads, having fluid control and sealing functions.

[0032] The second valve stem 7: Connected to the bottom of the valve body through a sealing bearing, thread - meshed with the bottom of the valve plate to ensure the stable movement of the valve plate.

[0033] Connection flanges 8: Fixedly installed at the front and rear ends of the valve body, used to connect the pipeline system.

[0034] 2. Valve plate design:

[0035] The valve plate adopts a composite structure design, including a support body, an extension seat, sliding blocks and a sealing gasket:

[0036] Support body 61: Made of a circular stainless - steel metal plate, providing the main support for the valve plate.

[0037] Extension seat 62: Fixed on the top of the support body, extending upward, providing a support point for the connection between the valve plate and the first valve stem.

[0038] Sliding blocks 63: Installed on both sides of the support body, used for sliding inside the valve body to ensure the smooth movement of the valve plate.

[0039] Sealing gasket 64: Wrapped around the outside of the support body, in sealing cooperation with the valve body to prevent fluid leakage.

[0040] 3. Second valve stem design:

[0041] The second valve stem adopts a double valve stem linkage design to ensure the stability and synchronism of the valve plate movement:

[0042] Sealing bearing 71: Fixedly installed at the bottom of the valve body to provide stable support for the second valve stem.

[0043] Threaded rod 72: Fixed inside the sealing bearing and thread-engaged with the bottom of the valve plate to ensure the vertical movement of the valve plate.

[0044] Force application seat 73: Fixed at the bottom of the threaded rod to provide additional support and sealing.

[0045] 4. Sealing system design:

[0046] The sealing system design of the valve is of great significance to ensure the high sealing performance of the valve:

[0047] The gasket uses a rubber sealing ring, which has good sealing performance and corrosion resistance.

[0048] The threaded engagement between the threaded rod and the valve plate forms a sealed connection.

[0049] The force application seat is made of metal parts to provide additional sealing support through the force application holes.

[0050] 5. Manufacturing and assembly:

[0051] Advanced numerical control machining technology is adopted to ensure the accuracy and quality of each component of the valve.

[0052] 6. Design key points:

[0053] 6.1 Valve plate design 6:

[0054] The valve plate should have fluid control and sealing functions. When designing the valve plate, factors such as its material, sealing surface shape, and surface smoothness should be considered to ensure that it can accurately control the fluid passage when opening and closing, and achieve a tight seal when closed to prevent leakage.

[0055] 6.2 Second valve stem design 7:

[0056] The second valve stem should be linked with the valve plate to ensure the smooth movement of the valve plate. The double valve stem linkage design is adopted. When only one valve stem rotates, the thread of the other valve stem will catch the valve plate, thus avoiding the leakage risk caused by misoperation.

[0057] 6.3 Sealing material selection:

[0058] Sealing materials with high pressure resistance and corrosion resistance, such as rubber sealing rings or metal sealing rings, should be selected for the sealing part between the valve plate and the valve body to ensure that the valve can effectively prevent fluid leakage when closed.

[0059] 6.4 Structural stability:

[0060] When designing the valve structure, its stability and strength should be considered to ensure that the valve can still operate normally under high pressure and harsh working conditions without deformation or damage.

[0061] 7. Application scenarios:

[0062] 7.1 Industrial fluid control:

[0063] In industrial fields such as chemical industry, petroleum, and pharmaceuticals, high-sealing anti-leakage gate valves are widely used in fluid control systems to regulate and control the flow of media, ensuring the safety and stability of the production process.

[0064] 7.2 Municipal engineering:

[0065] In municipal fields such as water supply and drainage, heating and cooling, high-sealing anti-leakage gate valves are used in pipeline systems to control the on-off of fluids, prevent pipeline leakage, and ensure the safe operation of urban infrastructure.

[0066] 7.3 Sewage treatment:

[0067] In the sewage treatment system of sewage treatment plants, high-sealing anti-leakage gate valves are used to control the flow and treatment process of sewage, effectively preventing sewage leakage and protecting the environment and public health.

[0068] 8. Conclusion:

[0069] The design and application of high-sealing anti-leakage gate valves is a comprehensive project that requires full consideration of process requirements, safety standards, and environmental factors. Through reasonable design and strict quality control, high-sealing anti-leakage gate valves can provide reliable guarantees for industrial production and urban operation, achieving the dual goals of fluid control and environmental protection.

[0070] Using the technical solutions described in this utility model, or those skilled in the art inspired by the technical solutions of this utility model to design similar technical solutions and achieving the above technical effects shall fall within the protection scope of this utility model.

Claims

1. A high-sealing leak-proof gate valve, characterized in that: It includes a valve body (1), a valve cover (2), a valve neck (3), a first valve stem (4), a handwheel (5), a valve plate (6), a second valve stem (7) and a connecting flange (8), wherein: The valve cover (2) is fixedly installed on the top of the valve body (1), and the valve neck (3) is fixedly installed on the top of the valve cover (2). The first valve stem (4) is rotatably installed inside the valve neck (3) through a sealing bearing; The handwheel (5) is fixedly installed on the top of the first valve stem (4), and the valve plate (6) is threadedly engaged at the bottom of the first valve stem (4) and slidably installed inside the valve body (1); The second valve stem (7) is rotatably installed at the bottom of the valve body (1) through a sealing bearing and is threadedly engaged at the bottom of the valve plate (6); The connecting flange (8) is fixedly installed at the front and rear ends of the valve body (1).

2. The high-sealing leak-proof gate valve according to claim 1, characterized in that: The valve plate (6) includes a support body (61), an extension seat (62), a sliding block (63) and a gasket (64). The extension seat (62) is fixedly installed on the top of the support body (61). The sliding block (63) is fixedly installed on both sides of the support body (61) and is slidably installed inside the valve body (1); The gasket (64) wraps around the outside of the support body (61) and has openings for the extension seat (62) and the sliding block (63) to pass through.

3. The high-sealing leak-proof gate valve according to claim 1, characterized in that: The second valve stem (7) includes a sealing bearing (71), a threaded rod (72) and a force application seat (73). The sealing bearing (71) is fixedly installed at the bottom of the valve body (1), and the threaded rod (72) is fixedly installed inside the sealing bearing (71); The force application seat (73) is fixedly installed at the bottom of the threaded rod (72).

4. The high-sealing anti-leakage gate valve according to claim 2, characterized in that: The support body (61) inside the valve plate (6) is made of a circular stainless steel metal plate, and the extension seat (62) is a metal block extending upward from the support body (61). Through threaded holes are provided inside the support body (61) and the extension seat (62); The sliding block (63) is composed of a pair of mirror-image sliding protrusions, and the gasket (64) is made of a rubber sealing ring; The threaded holes inside the support body (61) and the extension seat (62) are engaged with the first valve stem (4) and the second valve stem (7), and the first valve stem (4) and the second valve stem (7) inside the support body (61) and the extension seat (62) contact but do not connect at their midline positions; The valve plate (6) can move vertically by the rotation of the first valve stem (4).

5. The high-sealing leak-proof gate valve according to claim 3, characterized in that: The inner ring of the sealing bearing (71) inside the second valve stem (7) is fixedly connected to the threaded rod (72), and the outer ring of the sealing bearing (71) inside the second valve stem (7) is fixedly connected to the valve body (1); The thread on the outside of the threaded rod (72) is engaged with the valve plate (6), and the force application seat (73) is made of a metal piece with a force application hole.

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