Pressure reducing valve with sealing structure

Abstract

The utility model discloses a take sealing structure's pressure reducing valve, this take sealing structure's pressure reducing valve includes valve body, the valve core that is set up in the valve body along the axial activity, sealing gasket, one end surface of valve body is equipped with the abutment portion, the abutment portion is equipped with first sealing boss and second sealing boss, first sealing boss with sealing gasket abuts, sealing gasket fills in first sealing boss with second sealing boss between under the pressure state, second sealing boss is equipped with the air hole of through valve body, and the entrance of air hole is equipped with sealing cone surface. Through first sealing boss to sealing gasket exert pressure and make it produce deformation, fill in first sealing boss with second sealing boss between, realize radial seal, effectively cut off the gas medium in the air cylinder through the gap between sealing gasket and valve body leakage, and simultaneously utilize the sealing cone surface and sealing abutment surface of oblique setting to increase sealing contact area and gas path length, further promote sealing performance.

Description

Technical Field

[0001] This utility model relates to the field of pressure reducing valve technology, and in particular to a pressure reducing valve with a sealing structure. Background Technology

[0002] A pressure reducing valve is a device used to reduce fluid pressure. It typically consists of a main valve body, valve core, spring, and regulating mechanism, working together to achieve stable control of fluid pressure. It plays a crucial role in industrial or pipeline systems. The 070 model pressure reducing valve used on cylinders primarily performs pressure regulation and system protection functions. It can reduce the input high-pressure gas to the required low pressure to meet the cylinder's operating needs. When pressure relief is required, the pressure inside the cylinder can be reduced by manually pressing the control panel.

[0003] However, during long-term use, the sealing structure of the existing 070 model pressure reducing valve is prone to aging or wear, leading to a decline in sealing performance. This, in turn, causes pressure fluctuations at the pressure relief port, affecting the normal operation of the cylinder and related equipment. Furthermore, seal failure can also cause gas leakage, wasting working medium and potentially polluting the surrounding environment, increasing the difficulty and frequency of equipment maintenance. These problems are particularly pronounced in high-temperature, high-humidity, or corrosive environments, further exacerbating the deterioration of sealing materials and shortening the product's service life.

[0004] In response to the aforementioned technical deficiencies, the applicant has conducted in-depth research and improvements, and proposed a pressure reducing valve structure that can effectively improve sealing performance, extend service life, and adapt to complex working conditions. The relevant technical solutions are proposed based on this background. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the traditional pressure reducing valve design and to provide a product that improves sealing performance and extends product lifespan.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A pressure reducing valve with a sealing structure includes a valve body, a valve core axially movably disposed within the valve body, and a sealing gasket. One end face of the valve body is provided with an abutment portion, the abutment portion having a first sealing boss and a second sealing boss. The first sealing boss abuts against the sealing gasket. The sealing gasket fills the space between the first sealing boss and the second sealing boss under pressure. The second sealing boss has a vent hole penetrating the valve body, and the inlet of the vent hole has a sealing cone surface. The valve core has a sealing abutment surface that mates with the sealing cone surface.

[0008] Preferably, the side wall of the valve body is provided with an air inlet that communicates with the air hole, and the other end of the valve body is provided with a groove that communicates with the air hole.

[0009] Preferably, the valve body is further provided with a radially outwardly extending connecting portion located below the air hole, and the connecting portion is provided with an external threaded groove.

[0010] Preferably, the first sealing boss is annular and located near the outer edge of the abutment portion, and the second sealing boss is located in the central region of the abutment portion.

[0011] Preferably, the sealing cone surface is an inclined surface.

[0012] Preferably, it also includes a connecting plate and rivets, the rivets fixing one end of the connecting plate to the cylinder, the connecting plate having a bent operating part, and the operating part having a rectangular connecting hole.

[0013] Preferably, the valve core includes a valve stem that passes through an air hole and a connecting hole, forming a fluid channel between the valve stem and the inner wall of the air hole. The valve stem end is provided with two retaining rings to restrict the operation part from coming out. The operation part can pull the valve stem upward to make the sealing contact surface fit tightly with the sealing cone surface.

[0014] Beneficial effects:

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention applies pressure to the sealing gasket through the first sealing boss, causing it to deform and fill the space between the first and second sealing bosses, thus achieving radial sealing and effectively preventing leakage of gas medium from the cylinder through the gap between the sealing gasket and the valve body. At the same time, the inclined sealing cone surface and sealing contact surface increase the sealing contact area and gas path length, further improving the sealing performance. Through the above structural design, while overcoming the limitations of the prior art, this product is suitable for high temperature, high humidity, or corrosive working conditions, and extends the service life of the pressure reducing valve. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a pressure reducing valve with a sealing structure according to the present invention. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the structure of a pressure reducing valve with a sealing structure according to the present invention. Figure 2 ;

[0019] Figure 3 This is a side cross-sectional view of a pressure reducing valve with a sealing structure according to the present invention.

[0020] Figure 4 This is an exploded structural diagram of a pressure reducing valve with a sealing structure according to the present invention.

[0021] Figure 5 This is a schematic diagram of the assembled structure of a pressure reducing valve with a sealing structure according to this utility model;

[0022] Figure 6 This is a partial cross-sectional view of the pressure reducing valve with a sealing structure according to the present invention after assembly.

[0023] Figure 7 This utility model Figure 6 A partial enlarged view A of a pressure reducing valve with a sealing structure;

[0024] The correspondence between the labels and component names in the attached figures is as follows:

[0025] Reference numerals: 1. Valve body; 2. Valve core; 3. Sealing gasket; 4. Connecting plate; 5. Rivet; 6. Snap ring; 7. Cylinder; 11. Abutment part; 12. First sealing boss; 13. Second sealing boss; 14. Air hole; 15. Air inlet; 16. Groove; 17. Connecting part; 141. Sealing cone surface; 171. External thread groove; 21. Sealing abutment surface; 22. Valve stem; 23. Fluid passage; 41. Operating part; 42. Connecting hole; 71. Pressure relief hole. Detailed Implementation

[0026] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", 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.

[0028] In this embodiment of the utility model, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0029] Reference example Figures 1 to 7A pressure reducing valve with a sealing structure includes a valve body 1, a valve core 2 movably disposed within the valve body 1 along the axial direction, and a sealing gasket 3. One end face of the valve body 1 is provided with an abutment portion 11, the abutment portion 11 is provided with a first sealing boss 12 and a second sealing boss 13, the first sealing boss 12 abuts against the sealing gasket 3, the sealing gasket 3 fills between the first sealing boss 12 and the second sealing boss 13 under pressure, the second sealing boss 13 is provided with an air hole 14 penetrating the valve body 1, the inlet of the air hole 14 is provided with a sealing cone surface 141, and the valve core 2 is provided with a sealing abutment surface 21 that cooperates with the sealing cone surface 141.

[0030] The first sealing boss 12 applies pressure to the sealing gasket 3, causing it to deform and fill the space between the first sealing boss 12 and the second sealing boss 13, thus achieving radial sealing and effectively preventing the gas medium in the cylinder 7 from leaking through the gap between the sealing gasket 3 and the valve body 1. At the same time, the inclined sealing cone surface 141 and the sealing contact surface 21 increase the sealing contact area and the gas path length, further improving the sealing performance. Through the above structural design, while overcoming the limitations of the prior art, this product is suitable for high temperature, high humidity or corrosive working conditions and extends the service life of the pressure reducing valve.

[0031] It is worth mentioning that the side wall of the valve body 1 is provided with an air inlet 15 that communicates with the air hole 14, and the other end of the valve body 1 is provided with a groove 16 that communicates with the air hole 14. The operating tool can rotate the connecting part 17 through the groove 16, thereby making the connecting part 17 and the pressure relief hole 71 of the cylinder 7 threadedly connected stably.

[0032] It is worth mentioning that the valve body 1 is also provided with a radially outward extending connecting part 17, which is located below the air hole 14. The connecting part 17 is provided with an external thread groove 171 and adopts a threaded connection method, so that the abutting part 11 applies downward pressure to the sealing gasket 3 to form an effective fastening and sealing. The sealing gasket 3 is made of copper, which has good thermal conductivity and ductility, and can undergo moderate deformation under pressure, thereby improving the fit of the sealing surface.

[0033] It is worth mentioning that the first sealing boss 12 is annular and located near the outer edge of the abutment portion 11, while the second sealing boss 13 is located in the central region of the abutment portion 11.

[0034] It is worth mentioning that the sealing cone surface 141 is an inclined surface, which realizes the self-centering function by utilizing the geometric characteristics of the cone surface. When the valve core 2 moves towards the air hole 14, the cone surface angle can guide the valve core 2 to automatically adjust its position, so that the sealing contact surface 21 and the sealing cone surface 141 maintain good concentricity and uniform contact, thereby improving the sealing reliability. The inclined cone surface design extends the medium leakage path, forcing the gas medium to flow along the cone surface direction and avoiding direct vertical escape. This structure effectively increases the flow resistance by increasing the leakage path length and changing the flow direction. According to the principle of fluid mechanics, the kinetic energy and pressure of the medium are gradually dissipated in the path, inhibiting the gas from leaking out through the sealing gap. In addition, the cone surface mating structure has a certain fault tolerance during the assembly process, which can compensate for processing or assembly errors, enhance the overall structural stability, and reduce the manufacturing difficulty.

[0035] It is worth mentioning that it also includes a connecting plate 4 and a rivet 5. The rivet 5 fixes one end of the connecting plate 4 to the cylinder 7. The connecting plate 4 is provided with a bent operating part 41. The operating part 41 has a rectangular connecting hole 42. The operating part 41 is designed with a certain elastic bending structure, which can drive the valve core 2 to rise in a natural state, thereby closing the fluid flow channel inside the valve body 1. The operating part 41 and the valve stem 22 are fitted with a rectangular connecting hole 42, so that the valve stem 22 has a certain amount of movement in the connecting hole 42, thereby effectively absorbing the position deviation caused by manufacturing tolerance or assembly error and improving assembly fault tolerance.

[0036] It is worth mentioning that the valve core 2 includes a valve stem 22, which passes through the air hole 14 and the connecting hole 42. A fluid channel 23 is formed between the valve stem 22 and the inner wall of the air hole 14. Two retaining rings 6 are provided at the end of the valve stem 22 to restrict the operation part 41 from coming out. The operation part 41 can pull the valve stem 22 upward so that the sealing contact surface 21 and the sealing cone surface 141 are tightly fitted. The sealing gasket 3 is placed in the pressure relief hole 71 of the cylinder 7. The combination of the valve core 2 and the valve body 1 is taken out, and the contact part 11 of the valve body 1 is embedded in the pressure relief hole 71. The valve body 1 is connected and fixed to the pressure relief hole 71 by means of the external thread groove 171. The valve stem 22 and the operation part 41 are connected and fixed by the retaining rings 6. When the cylinder 7 needs to be depressurized, the operation part 41 is driven by downward pressure, so that the sealing contact surface 21 is disengaged from the sealing cone surface 141, and the gas medium in the cylinder 7 is discharged through the fluid channel 23.

[0037] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. A pressure reducing valve with a sealing structure, comprising a valve body (1), a valve core (2) axially movably disposed within the valve body (1), and a sealing gasket (3), characterized in that: The valve body (1) has an abutment portion (11) on one end face. The abutment portion (11) has a first sealing boss (12) and a second sealing boss (13). The first sealing boss (12) abuts against the sealing gasket (3). The sealing gasket (3) fills the space between the first sealing boss (12) and the second sealing boss (13) under pressure. The second sealing boss (13) has an air hole (14) that penetrates the valve body (1). The inlet of the air hole (14) has a sealing cone surface (141). The valve core (2) has a sealing abutment surface (21) that cooperates with the sealing cone surface (141).

2. The pressure reducing valve with a seal structure according to claim 1, characterized by: The valve body (1) has an air inlet (15) communicating with the air hole (14) on its side wall, and a groove (16) communicating with the air hole (14) is provided at the other end of the valve body (1).

3. The pressure reducing valve with a sealing structure according to claim 2, characterized in that: The valve body (1) is also provided with a radially outward extending connecting part (17) located below the air hole (14), and the connecting part (17) is provided with an external thread groove (171).

4. The pressure reducing valve with seal structure according to claim 1, characterized in that: The first sealing boss (12) is annular and located near the outer edge of the abutment portion (11), and the second sealing boss (13) is located in the central region of the abutment portion (11).

5. The pressure reducing valve with seal structure according to claim 1, characterized in that: The sealing cone surface (141) is an inclined surface.

6. The pressure reducing valve with seal structure according to claim 1, characterized in that: It also includes a connecting plate (4) and a rivet (5). The rivet (5) fixes one end of the connecting plate (4) to the cylinder (7). The connecting plate (4) is provided with a bent operating part (41). The operating part (41) has a rectangular connecting hole (42).

7. The pressure reducing valve with seal structure according to claim 6, characterized in that: The valve core (2) includes a valve stem (22), which passes through an air hole (14) and a connecting hole (42). A fluid channel (23) is formed between the valve stem (22) and the inner wall of the air hole (14). Two retaining rings (6) are provided at the end of the valve stem (22) to restrict the operation part (41) from coming out. The operation part (41) can pull the valve stem (22) upward so that the sealing contact surface (21) fits tightly with the sealing cone surface (141).

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