Detachable valve seat sealing structure of pneumatic stop valve

Abstract

The utility model provides a detachable pneumatic cut-off valve seat sealing structure, which relates to the field of pneumatic cut-off valves, and comprises a valve body, the left side surface of the valve body and the right side surface of the valve body are connected with mounting flanges, the outer surface of each mounting flange is provided with a group of mounting holes, and the mounting holes are communicated with the mounting flanges. And sealing grooves are formed in the left side surface and the right side surface of the mounting flange. According to the detachable valve seat sealing structure of the pneumatic cut-off valve, the switching valve rod is driven by the pneumatic part, the switching block and the butterfly plate can be driven to rotate, opening and cutting off of a fluid channel can be rapidly and accurately achieved, the response speed is high, the control precision is high, when the pressure in the valve body is too high, the sealing plate slides under the pressure effect, the spring and the buffer damper are compressed, and the sealing effect is good. The fluid enters the pressure relief assembly, the valve body is prevented from being damaged due to too high pressure, the rotating handle is rotated to drive the threaded lead screw to rotate, the initial position of the sealing plate can be flexibly adjusted, and therefore the pressure relief pressure is accurately adjusted.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic shut-off valve technology, and specifically discloses a detachable pneumatic shut-off valve seat sealing structure. Background Technology

[0002] Pneumatic shut-off valves, also known as pneumatic gate valves, are a type of actuator in automation systems. They consist of a multi-spring pneumatic diaphragm actuator or a floating piston actuator and a regulating valve. They receive signals from regulating instruments to control the shut-off, connection, or switching of fluid flow within process pipelines. They are characterized by simple structure, sensitive response, and reliable operation. They are widely used in petroleum, chemical, and metallurgical industries.

[0003] Currently, conventional pneumatic shut-off valve seat sealing structures typically feature an integrated design for the seat seal. When sealing problems occur, maintenance personnel often need to perform complex and time-consuming disassembly of the entire valve. Furthermore, in high-pressure environments, the seals may experience excessive wear due to excessive pressure, leading to decreased sealing performance. Conversely, sudden pressure drops can easily result in incomplete sealing, causing media leakage and seriously threatening production safety. This also leads to resource waste and environmental pollution. Therefore, we provide a detachable pneumatic shut-off valve seat sealing structure to address these issues. Utility Model Content

[0004] This utility model proposes a detachable pneumatic shut-off valve seat sealing structure. By rotating the handle, the handle drives the threaded screw to rotate, and the threaded screw pushes the sealing plate to move, changing the initial position of the sealing plate, thereby adjusting the pressure relief pressure. This solves the problem that the sealing component may be excessively worn due to excessive pressure, resulting in a decrease in sealing performance, and that the sealing may be incomplete when the pressure drops suddenly.

[0005] This utility model is implemented as follows: a detachable pneumatic shut-off valve seat sealing structure includes a valve body, with mounting flanges connected to both the left and right sides of the valve body. Each mounting flange has a set of mounting holes on its outer surface. Both the left and right sides of the mounting flange have sealing grooves, and a sealing gasket is connected to the inner wall of each sealing groove. A valve seat assembly is snapped into the inner wall of the valve body, and a pressure relief assembly is connected to the bottom surface of the valve body.

[0006] As a preferred embodiment of the detachable pneumatic shut-off valve seat sealing structure of this utility model, the valve seat assembly includes a valve seat body connected to the inner wall of the valve body, a pneumatic component is connected to the upper surface of the valve seat assembly, and a transition valve stem is snapped into the inner wall of the pneumatic component.

[0007] As a preferred embodiment of the detachable pneumatic shut-off valve seat sealing structure of this utility model, a positioning plate is connected to both the left and right sides of the valve seat body. Two positioning bolts are threaded onto the upper surface of each positioning plate, and each positioning plate is connected to the valve body through the positioning bolts.

[0008] As a preferred embodiment of the detachable pneumatic shut-off valve seat sealing structure of this utility model, the bottom surface of the adapter valve stem is connected to an adapter block, and the bottom surface of the adapter block is connected to a disc plate.

[0009] As a preferred embodiment of the detachable pneumatic shut-off valve seat sealing structure of this utility model, the bottom surface of the pressure relief assembly is connected to two pressure regulating cylinders. Each pressure regulating cylinder has a sealing plate slidably connected to its inner wall, a buffer damper is snapped into its inner wall, a spring is sleeved on the outer surface of each buffer damper, a threaded screw is threadedly connected to the inner bottom wall of each pressure regulating cylinder, and a handle is connected to the bottom surface of each threaded screw.

[0010] The beneficial effects of this utility model are:

[0011] This detachable pneumatic shut-off valve features a seat sealing structure with a sealing groove and gasket on the mounting flange, effectively ensuring a tight seal with external pipelines and preventing fluid leakage. The seat assembly, aided by a positioning plate and bolts, easily achieves precise positioning and secure connection to the valve body, and is easy to disassemble, significantly reducing installation and maintenance time and costs. For fluid control, the pneumatic actuator drives the adapter valve stem, which in turn rotates the adapter block and disc, enabling rapid and precise opening and closing of the fluid passage. It offers fast response and high control accuracy, meeting the fluid control needs of various operating conditions. When the pressure inside the valve body is too high, the sealing plate slides under pressure, compressing the spring and buffer damper, allowing fluid to enter the pressure relief assembly, preventing damage to the valve body due to excessive pressure. Furthermore, rotating the handle drives the threaded screw, flexibly adjusting the initial position of the sealing plate to precisely regulate the pressure relief, effectively improving the safety and reliability of the shut-off valve. Attached Figure Description

[0012] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0013] Figure 1 This is a three-dimensional structural diagram of the detachable pneumatic shut-off valve seat sealing structure of this utility model;

[0014] Figure 2This is a rear-view three-dimensional structural diagram of the detachable pneumatic shut-off valve seat sealing structure of this utility model.

[0015] Figure 3 This is a three-dimensional structural diagram of the valve seat body in the detachable pneumatic shut-off valve seat sealing structure of this utility model.

[0016] Figure 4 This is a side sectional view of the pressure regulating cylinder in the detachable pneumatic shut-off valve seat sealing structure of this utility model.

[0017] The markings in the diagram are: 1. Valve body; 2. Mounting flange; 3. Sealing groove; 4. Sealing gasket; 5. Valve seat assembly; 501. Valve seat body; 502. Positioning plate; 503. Pneumatic component; 504. Adapter valve stem; 505. Adapter block; 506. Disc; 507. Positioning bolt; 6. Pressure relief assembly; 601. Turn handle; 602. Pressure regulating cylinder; 603. Sealing plate; 604. Buffer damping; 605. Spring; 606. Threaded screw; 7. Mounting hole; 8. Parameter label. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0019] Please see Figure 1-4 A detachable pneumatic shut-off valve seat sealing structure includes a valve body 1. Mounting flanges 2 are connected to both the left and right sides of the valve body 1. Each mounting flange 2 has a set of mounting holes 7 on its outer surface. Sealing grooves 3 are formed on both the left and right sides of the mounting flange 2. A sealing gasket 4 is connected to the inner wall of each sealing groove 3. A valve seat assembly 5 is snapped onto the inner wall of the valve body 1. A pressure relief assembly 6 is connected to the bottom surface of the valve body 1.

[0020] In this embodiment: By inputting a pneumatic signal to the pneumatic component 503, the transition valve stem 504 drives the transition block 505 and the disc 506 to rotate, opening the fluid passage and allowing fluid to flow. When it is necessary to cut off the fluid, a reverse pneumatic signal is input to the pneumatic component 503, causing the transition valve stem 504 to drive the transition block 505 and the disc 506 to rotate in the opposite direction. The disc 506 then contacts the valve seat body 501, cutting off the fluid passage. When the pressure inside the valve body 1 is too high, the sealing plate 603 slides downward under pressure, compressing the spring 605 and the buffer damper 604, allowing fluid to enter the pressure relief assembly 6. Simultaneously, when adjusting the pressure relief value according to actual needs, the handle 601 is rotated, causing the threaded screw 606 to rotate. The threaded screw 606 pushes the sealing plate 603 to move, changing the initial position of the sealing plate 603, thereby adjusting the pressure relief and effectively improving the safety and reliability of the shut-off valve.

[0021] As a technical optimization of this utility model, the valve seat assembly 5 includes a valve seat body 501 connected to the inner wall of the valve body 1. A pneumatic component 503 is connected to the upper surface of the valve seat assembly 5. A transition valve stem 504 is snapped into the inner wall of the pneumatic component 503. Positioning plates 502 are connected to the left and right sides of the valve seat body 501. Two positioning bolts 507 are threaded onto the upper surface of each positioning plate 502. Each positioning plate 502 is connected to the valve body 1 through the positioning bolts 507. A parameter label 8 is connected to the back of the valve seat body 501.

[0022] In this embodiment: the pneumatic component 503 provides power to the transfer valve stem 504, which makes the opening and closing operation of the valve more flexible. The positioning plate 502 and positioning bolt 507 make it easy for the operator to connect the valve seat body 501 to the valve body 1. The parameter label 8 improves the identification of the equipment.

[0023] As a technical optimization of this utility model, the bottom surface of the adapter valve stem 504 is connected to the adapter block 505, the bottom surface of the adapter block 505 is connected to the disc plate 506, the bottom surface of the pressure relief assembly 6 is connected to two pressure regulating cylinders 602, the inner wall of each pressure regulating cylinder 602 is slidably connected to the sealing plate 603, the inner wall of each pressure regulating cylinder 602 is snapped with the buffer damper 604, the outer surface of each buffer damper 604 is sleeved with a spring 605, the inner bottom wall of each pressure regulating cylinder 602 is threadedly connected to the threaded screw 606, and the bottom surface of each threaded screw 606 is connected to the handle 601.

[0024] In this embodiment: the valve seat body 501 can be opened and closed by the disc 506, and the screw 601 can be turned by the operator to adjust the initial position of the sealing plate 603.

[0025] The working principle and usage process of this utility model are as follows: In use, the sealing gasket 4 is placed into the sealing groove 3 of the mounting flange 2. The mounting flange 2 is then connected and tightened to the external pipeline using bolts through the mounting hole 7. Next, the valve seat assembly 5 is placed into the inner wall of the valve body 1, aligning the positioning plate 502 with the valve body 1. Then, the positioning bolts 507 are used to fix the positioning plate 502 to the valve body 1. The pressure relief assembly 6 is connected to and fixed to the bottom surface of the valve body 1. During use, a pneumatic signal is input to the pneumatic component 503, causing the adapter valve stem 504 to rotate, driving the adapter block 505 and disc 506 to open the fluid passage, allowing fluid to flow. When it is necessary to cut off the fluid flow... A reverse pneumatic signal is input to the pneumatic component 503, causing the transition valve stem 504 to drive the transition block 505 and the disc 506 to rotate in opposite directions. The disc 506 fits against the valve seat body 501, cutting off the fluid passage. When the pressure inside the valve body 1 is too high, the sealing plate 603 slides downward under the pressure, compressing the spring 605 and the buffer damper 604, allowing the fluid to enter the pressure relief assembly 6. At the same time, when adjusting the pressure relief value according to actual needs, the handle 601 is rotated. The handle 601 drives the threaded screw 606 to rotate, and the threaded screw 606 pushes the sealing plate 603 to move, changing the initial position of the sealing plate 603, thereby adjusting the pressure relief.

[0026] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A detachable pneumatic shut-off valve seat sealing structure, comprising a valve body (1), characterized in that: The left and right sides of the valve body (1) are connected to mounting flanges (2). Each mounting flange (2) has a set of mounting holes (7) on its outer surface. The left and right sides of the mounting flange (2) are provided with sealing grooves (3). Each sealing groove (3) has a sealing gasket (4) connected to its inner wall. The valve body (1) has a valve seat assembly (5) snapped into its inner wall. The bottom surface of the valve body (1) is connected to a pressure relief assembly (6).

2. The detachable pneumatic shut-off valve seat sealing structure according to claim 1, characterized in that: The valve seat assembly (5) includes a valve seat body (501) connected to the inner wall of the valve body (1), and a pneumatic component (503) is connected to the upper surface of the valve seat assembly (5). A transition valve stem (504) is snapped into the inner wall of the pneumatic component (503).

3. The detachable pneumatic shut-off valve seat sealing structure according to claim 2, characterized in that: Positioning plates (502) are connected to the left side and the right side of the valve seat body (501). Each positioning plate (502) has two positioning bolts (507) threaded onto its upper surface. Each positioning plate (502) is connected to the valve body (1) through the positioning bolts (507).

4. The detachable pneumatic shut-off valve seat sealing structure according to claim 3, characterized in that: A parameter label (8) is attached to the back of the valve seat body (501).

5. The detachable pneumatic shut-off valve seat sealing structure according to claim 4, characterized in that: The bottom surface of the adapter valve stem (504) is connected to an adapter block (505), and the bottom surface of the adapter block (505) is connected to a disc plate (506).

6. The detachable pneumatic shut-off valve seat sealing structure according to claim 1, characterized in that: The bottom surface of the pressure relief assembly (6) is connected to two pressure regulating cylinders (602). Each pressure regulating cylinder (602) has a sealing plate (603) slidably connected to its inner wall. Each pressure regulating cylinder (602) has a buffer damper (604) snapped into its inner wall. Each buffer damper (604) has a spring (605) sleeved on its outer surface. Each pressure regulating cylinder (602) has a threaded screw (606) threadedly connected to its inner bottom wall. Each threaded screw (606) has a handle (601) connected to its bottom surface.

Images