A fixed sealing structure for a valve

Abstract

This utility model discloses a fixed sealing structure for a valve, including a lower valve seat and an upper valve body. An upper pressure plate is sleeved on the outer side of the second connecting seat of the upper valve body. The lower valve seat and the upper valve body are connected and fixed by a first connecting seat, a second connecting seat, an upper pressure plate, and screws. The nuts of the screws used for fixing are pressed onto the upper end of the upper pressure plate. The upper pressure plate is a detachable structure and includes a first pressure plate and a second pressure plate. One end of the first pressure plate and the second pressure plate are hinged, and the other end of the first pressure plate and the second pressure plate are fixedly connected by a connecting support and bolts. This utility model increases the strength of the flange surface of the second connecting seat outside the upper valve body by sleeved on the outer side of the second connecting seat of the upper valve body, and ensures that the valve flange will not deform even when the ventilation pressure is too high, thereby improving the sealing effect.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically a fixed sealing structure for a valve. Background Technology

[0002] Valves are control components in fluid transport systems. They are pipeline accessories used to open and close pipelines, control flow direction, and regulate and control the parameters (temperature, pressure, and flow rate) of the transported medium. Based on their function, they can be divided into shut-off valves, check valves, regulating valves, etc. They have functions such as shut-off, regulation, flow diversion, backflow prevention, pressure stabilization, flow splitting, or overflow pressure relief. Valves used in fluid control systems mainly achieve sealing of the valve body through structures such as valve plates, gates, and valve balls, thereby achieving shut-off during the fluid transport process, blocking the passage in the valve body, and thus shutting off the fluid, thereby achieving overall valve control.

[0003] The valve sealing structure described in the prior art (application number 202320150023.5) utilizes a gate, a middle sleeve, a cavity, and a side sleeve. During the valve shut-off operation via the gate, as the gate descends, its bottom end engages with the middle sleeve, causing the middle sleeve to sink and compress the spring. The hydraulic oil in the cavity, under the downward pressure of the middle sleeve, squeezes the side sleeve, pushing it upward until it fully engages with the gate's external fixing plate and sealing gasket. This, combined with the gate, ensures the sealing effect after the middle sleeve moves, thus guaranteeing the valve sealing structure's effectiveness. Furthermore, the auxiliary sealing structure is simple, lacking complex transmission structures, and can have a longer service life. However, when the valve's air pressure is too high, the valve's fixing legs are not strong enough and are prone to deformation, leading to separation between the valve flange and the metal valve body, posing a risk of leakage and resulting in poor sealing performance. Utility Model Content

[0004] The purpose of this utility model is to provide a fixed sealing structure for valves to solve the problem in the prior art that when the valve venting pressure is too high, the valve fixing support is not strong enough and is easily deformed, which leads to the separation of the valve flange surface from the metal valve body, resulting in the risk of air leakage and poor sealing effect.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fixed sealing structure for a valve, comprising a lower valve seat and an upper valve body, wherein an upper pressure plate is sleeved on the outer side of the second connecting seat of the upper valve body, and the lower valve seat and the upper valve body are connected and fixed by a first connecting seat, a second connecting seat, an upper pressure plate and screws, wherein the nuts of the screws used for fixing are pressed on the upper end of the upper pressure plate, the upper pressure plate is a detachable structure, and the upper pressure plate includes a first pressure plate and a second pressure plate, one end of the first pressure plate and the second pressure plate are hinged, and the other end of the first pressure plate and the second pressure plate are fixedly connected by a connecting support and bolts.

[0006] Furthermore, the upper pressure plate is configured as an annular plate, and a protective pad is provided on the lower side of the upper pressure plate.

[0007] Furthermore, the outer wall of the upper pressure plate is provided with a positioning seat, and the positioning seat is provided with a positioning hole inside.

[0008] Furthermore, the positioning seat is provided with a limiting sleeve on the outside, and the limiting sleeve is provided with a limiting groove on the inside for engaging with the fixed support foot of the second connecting seat.

[0009] Furthermore, the connecting support includes a first support disposed at one end of the first pressure plate, a second support disposed at one end of the second pressure plate, and the first support and the second support are rotatably connected by a connecting shaft.

[0010] Furthermore, a third support is provided at the other end of the first pressure plate, and a fourth support is provided at the other end of the second pressure plate. The bolt is vertically welded to one side of the third support. A U-shaped hole is provided inside one end of the fourth support, and a limiting nut is threaded on one end of the bolt.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This utility model features an upper pressure plate fitted on the outer side of the second connecting seat of the upper valve body, with the nuts of the screws used to fix the first and second connecting seats pressed onto the upper end of the upper pressure plate. This increases the strength of the flange surface of the second connecting seat outside the upper valve body, ensuring that the valve flange will not deform even when the ventilation pressure is too high, thereby improving the sealing effect.

[0013] This utility model features a detachable upper pressure plate, which includes a first pressure plate and a second pressure plate. One end of the first pressure plate and the second pressure plate are hinged together, and the other end of the first pressure plate and the second pressure plate are fixedly connected by a connecting support and bolts. This makes it easy to fit the upper pressure plate onto the outside of the second connecting seat of the upper valve body, and the assembly and disassembly are convenient and quick.

[0014] This utility model features a limiting sleeve on the outside of the positioning seat and a limiting groove on the inside of the limiting sleeve for engaging with the outside of the fixed support foot of the second connecting seat. By fitting the limiting sleeve onto the outside of the fixed support foot of the second connecting seat, the stability of the positioning seat pressing against the outside of the second connecting seat is improved. At the same time, the fixed support foot of the second connecting seat and the positioning hole of the positioning seat are coaxially aligned, which facilitates the screwing in and fixing. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1This is a schematic diagram of the overall structure of the prior art;

[0017] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the upper pressure plate structure of this utility model;

[0019] Figure 4 This is a structural diagram of the upper pressure plate of this utility model.

[0020] In the diagram: 1. Upper valve body; 2. Lower valve seat; 3. Upper pressure plate; 4. First pressure plate; 5. Second pressure plate; 6. Positioning seat; 7. Limiting sleeve; 8. Limiting groove; 9. First support; 10. Connecting shaft; 11. Second support; 12. Second connecting seat; 13. Third support; 14. Fourth support; 15. Screw; 16. Limiting nut; 17. U-shaped hole; 18. First connecting seat. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 In this embodiment of the present invention, a fixed sealing structure for a valve includes a lower valve seat 2 and an upper valve body 1. An upper pressure plate 3 is sleeved on the outer side of the second connecting seat 12 of the upper valve body 1. The lower valve seat 2 and the upper valve body 1 are connected and fixed by a first connecting seat 18, a second connecting seat 12, an upper pressure plate 3, and screws. The nuts of the screws used for fixing are pressed on the upper end of the upper pressure plate 3, thereby increasing the flange strength of the second connecting seat 12 outside the upper valve body 1 and ensuring that the valve flange will not deform when the ventilation pressure is too high, thereby improving the sealing effect.

[0023] like Figure 2 and Figure 3 As shown, in order to fit the upper pressure plate 3 onto the outside of the second connecting seat 12 of the upper valve body 1, the upper pressure plate 3 is also designed as a detachable structure. The upper pressure plate 3 includes a first pressure plate 4 and a second pressure plate 5. One end of the first pressure plate 4 and the second pressure plate 5 are hinged together, and the other end of the first pressure plate 4 and the second pressure plate 5 are fixedly connected by a connecting support and bolts, so that the upper pressure plate 3 can be easily fitted onto the outside of the second connecting seat 12 of the upper valve body 1, and the assembly and disassembly are convenient and quick.

[0024] like Figure 2 and Figure 3 As shown, in order to press and fix the upper pressure plate 3 onto the second connecting seat 12, the upper pressure plate 3 is also set as an annular plate, and a protective pad is provided on the lower side of the upper pressure plate 3. A positioning seat 6 is provided on the outer wall of the upper pressure plate 3, and a positioning hole is provided inside the positioning seat 6, so that the upper pressure plate 3 can be pressed and fixed onto the second connecting seat 12 by screws.

[0025] like Figure 3 and Figure 4 As shown, in order to improve the stability of the positioning seat 6 pressing against the outside of the second connecting seat 12, a limiting sleeve 7 is also provided on the outside of the positioning seat 6, and a limiting groove 8 is provided on the inside of the limiting sleeve 7 for engaging with the outside of the fixed support foot of the second connecting seat 12. The limiting sleeve 7 is fitted onto the outside of the fixed support foot of the second connecting seat 12 to improve the stability of the positioning seat 6 pressing against the outside of the second connecting seat 12. At the same time, the fixed support foot of the second connecting seat 12 and the positioning hole of the positioning seat 6 are coaxially aligned, which facilitates the screw to be screwed in and fixed.

[0026] like Figure 3 and Figure 4 As shown, in order to fix the other ends of the first support 9 and the second support 11, the connecting support also includes a first support 9 provided at one end of the first pressure plate 4, a second support 11 provided at one end of the second pressure plate 5, and the first support 9 and the second support 11 are rotatably connected by a connecting shaft 10, so that the first pressure plate 4 and the second pressure plate 5 can be flipped and adjusted, thereby facilitating the disassembly and assembly of the upper pressure plate 3. A third support 13 is provided at the other end of the first pressure plate 4, and a fourth support 14 is provided at the other end of the second pressure plate 5. The bolt shank 15 is vertically welded to one side of the third support 13. A U-shaped hole 17 is provided inside one end of the fourth support 14, and a limiting nut 16 is threaded on one end of the bolt shank 15 for fixing the other ends of the first support 9 and the second support 11.

[0027] The working principle and usage process of this utility model are as follows: In use, the upper pressure plate 3 is sleeved on the outer side of the second connecting seat 12 of the upper valve body 1, and the nuts of the screws used to fix the first connecting seat 18 and the second connecting seat 12 are pressed on the upper pressure plate 3, thereby increasing the strength of the flange surface of the second connecting seat 12 outside the upper valve body 1, ensuring that the valve flange will not deform when the ventilation pressure is too high, thereby improving the sealing effect.

[0028] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fixed sealing structure for a valve, comprising a lower valve seat (2) and an upper valve body (1), characterized in that: An upper pressure plate (3) is sleeved on the outer side of the second connecting seat (12) of the upper valve body (1). The lower valve seat (2) and the upper valve body (1) are connected and fixed by the first connecting seat (18), the second connecting seat (12), the upper pressure plate (3) and screws. The nuts of the screws used for fixing are pressed on the upper end of the upper pressure plate (3). The upper pressure plate (3) is a detachable structure. The upper pressure plate (3) includes a first pressure plate (4) and a second pressure plate (5). One end of the first pressure plate (4) and the second pressure plate (5) are hinged, and the other end of the first pressure plate (4) and the second pressure plate (5) are fixedly connected by a connecting support and bolts.

2. The fixed sealing structure of a valve according to claim 1, characterized in that: The upper pressure plate (3) is configured as an annular plate, and a protective pad is provided on the lower side of the upper pressure plate (3).

3. The fixed sealing structure of a valve according to claim 2, characterized in that: The upper pressure plate (3) has a positioning seat (6) on its outer wall, and the positioning seat (6) has a positioning hole inside.

4. The fixed sealing structure of a valve according to claim 3, characterized in that: The positioning seat (6) is provided with a limiting sleeve (7) on the outside, and the limiting sleeve (7) is provided with a limiting groove (8) on the inside for engaging with the fixed support foot of the second connecting seat (12).

5. The fixed sealing structure of a valve according to claim 1, characterized in that: The connecting support includes a first support (9) provided at one end of the first pressure plate (4), and a second support (11) provided at one end of the second pressure plate (5). The first support (9) and the second support (11) are rotatably connected by a connecting shaft (10).

6. The fixed sealing structure of a valve according to claim 5, characterized in that: The third support (13) is located at the other end of the first pressure plate (4), and the fourth support (14) is located at the other end of the second pressure plate (5). The bolt (15) is vertically welded to one side of the third support (13). The fourth support (14) has a U-shaped hole (17) inside one end, and a limiting nut (16) is threaded onto one end of the bolt (15).

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