High-pressure and large-flow combined type sealing safety valve

Abstract

The utility model discloses a high-pressure and large-flow combined type sealing safety valve which comprises a shell, a valve, a guide sleeve and a spring seat, the valve and the guide sleeve are arranged in the shell, the left end of the valve is in contact with the inner wall of the shell to form sealing, the right end of the valve is inserted into the guide sleeve, the spring seat is inserted into the shell, a guide part is arranged in the center of the spring seat, and the guide part is connected with the guide sleeve. The guide part is inserted into the guide sleeve, a spring is arranged between the spring seat and the guide sleeve, a sealing gasket is arranged between the sealing gasket and the guide sleeve, the section of the sealing gasket is of a convex structure, and a sealing groove I and a sealing groove II are formed in the corresponding faces between the sealing gasket and the guide sleeve respectively. The inner ring of the sealing gasket is positioned in a wall body formed by the sealing groove I and the sealing groove II; the novel sealing gasket sealing mode is adopted, the instantaneous impact resisting function and the compensation function are achieved, when the safety valve works, working media pass through the spherical filter screen at the inlet, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of safety valves, in particular to a high-pressure, large-flow composite sealing safety valve. Background Art

[0002] The purpose of the safety valve is to limit the maximum pressure in the system. The existing safety valve functions to open and release pressure when the system pressure is higher than the safety pressure, and close and maintain pressure when the pressure drops to the safety pressure. The existing O-ring valve sealing type can only achieve reliable operation and good sealing under conditions where the working medium flow rate is small. When the working medium flow rate is large and the flow rate is high, a low pressure or even negative pressure area will be formed in the sealing ring installation groove, and there is a risk of the O-ring being rushed out of the installation groove. In addition, impurities in the medium will affect the sensitivity of the valve and its service life. It cannot meet the needs of actual use, so the market is in urgent need of improved technology to solve the above problems. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a high-pressure, large-flow composite sealed safety valve. It adopts an integrated structure, is easy to install and disassemble, and improves product processability. It adopts a new type of sealing gasket sealing form, has instantaneous impact resistance and compensation function. When the safety valve is working, the working medium passes through the spherical filter at the inlet, which increases the service life and can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-pressure, large-flow composite sealed safety valve, comprising a shell, a valve, a guide sleeve and a spring seat, the valve and the guide sleeve are arranged in the shell, the left end of the valve contacts the inner wall of the shell to form a seal, the right end of the valve is inserted into the guide sleeve, the spring seat is inserted into the shell, a guide portion is arranged at the center of the spring seat, the guide portion is inserted into the guide sleeve, a spring is arranged between the spring seat and the guide sleeve, a sealing gasket is arranged between the sealing gasket and the guide sleeve, the cross-section of the sealing gasket is arranged as a convex structure, sealing grooves I and II are respectively arranged on corresponding surfaces between the sealing gasket and the guide sleeve, and the inner ring of the sealing gasket is located in the wall formed by the sealing grooves I and II.

[0005] Furthermore, a retaining spring II is arranged at the right end of the spring seat, a limiting boss I is arranged on the inner wall of the shell, and a through hole is arranged in the circumferential direction of the spring seat.

[0006] Furthermore, a filter assembly is provided on the left side of the valve, and the filter assembly includes a spherical filter and a filter gasket. The filter gasket is stuck on the outer circumference of the spherical filter. A positioning sleeve is slidably connected to the inner wall of the shell. The right end of the positioning sleeve is in contact with the filter gasket, and the right end of the positioning sleeve is fixed in the shell by a retaining spring I.

[0007] Furthermore, a limiting boss 2 is arranged on the inner side of the sealing groove I, and a limiting structure is formed corresponding to the limiting boss 2 on the inner side of the sealing groove II.

[0008] Compared with the prior art, the beneficial effects of the utility model are:

[0009] 1. The integrated structure is adopted, which is convenient for installation and disassembly, improves the processability of the product, adopts a new type of sealing gasket sealing form, has the function of resisting instantaneous impact and has a compensation function. When the safety valve is working, the working medium passes through the spherical filter at the inlet to increase the service life.

[0010] 2. The designed retaining spring and limit convex can reduce the system's response to impact vibration, thereby playing the role of a protective device, improving the stiffness and damping of the process system, enhancing the system's vibration resistance, and effectively preventing and eliminating vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 ;

[0012] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 ;

[0013] Figure 3 It is a schematic diagram of the matching structure of the valve and the guide sleeve of the utility model.

[0014] In the figure: 1 housing, 2 valve, 3 sealing gasket, 4 guide sleeve, 5 spring seat, 6 filter gasket, 7 spherical filter, 8 positioning sleeve, 9 retaining spring I, 10 retaining spring II, 11 limiting boss 1, 12 spring, 13 guide part, 14 sealing groove I, 15 sealing groove II, 16 limiting boss 2. DETAILED DESCRIPTION

[0015] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0016] See also Figure 1-3The utility model provides a technical solution: a high-pressure, large-flow composite sealed safety valve, comprising a housing 1, a valve 2, a guide sleeve 4 and a spring seat 5, the valve 2 and the guide sleeve 4 are arranged in the housing 1, the left end of the valve 2 contacts the inner wall of the housing 1 to form a seal, the right end of the valve 2 is inserted into the guide sleeve 4, the spring seat 5 is inserted into the housing 1, a guide portion 13 is arranged at the center of the spring seat 5, the guide portion 13 is inserted into the guide sleeve 4, a spring 12 is arranged between the spring seat 5 and the guide sleeve 4, a sealing gasket 3 is arranged A sealing gasket 3 is arranged between the guide sleeve 4, and the cross-section of the sealing gasket 3 is arranged as a convex structure. The outer circumference of the sealing gasket 3 contacts the inner wall of the shell 1 to form a contact seal. A sealing groove Ⅰ14 and a sealing groove Ⅱ15 are respectively arranged on the corresponding surfaces between the sealing gasket 3 and the guide sleeve 4. The inner ring of the sealing gasket 3 is located in the wall formed by the sealing groove Ⅰ14 and the sealing groove Ⅱ15. The sealing gasket 3 is positioned by the sealing groove Ⅰ14 and the sealing groove Ⅱ15, and has the ability to withstand instantaneous impact and compensation functions to prevent the sealing gasket 3 from falling off.

[0017] A retaining spring II 10 is provided at the right end of the spring seat 5, and the spring seat 5 is firmly fixed in the housing 1 through the retaining spring II 10. A limiting boss 11 is provided on the inner wall of the housing 1, and the limiting boss 11 limits the left end of the spring seat 5 and fixes it in cooperation with the retaining spring II 10. A through hole is provided in the circumferential direction of the spring seat 5, and the medium is discharged from the housing 1 through the through hole.

[0018] A filter assembly is arranged on the left side of the valve 2, and the filter assembly includes a spherical filter 7 and a filter gasket 6. The filter gasket 6 is stuck on the outer circumference of the spherical filter 7. A positioning sleeve 8 is slidably connected to the inner wall of the shell 1. The right end of the positioning sleeve 8 abuts against the filter gasket 6. The right end of the positioning sleeve 8 is fixed in the shell 1 by a retaining spring Ⅰ9. The working medium can be filtered through the spherical filter 7 to prevent contamination and jamming due to excess matter, thereby improving product reliability.

[0019] A limiting boss 2 16 is arranged inside the sealing groove Ⅰ 14 , and a limiting structure is formed corresponding to the limiting boss 2 16 on the inside of the sealing groove Ⅱ 15 . The limiting structure can prevent the sealing gasket 3 from being deformed by being squeezed, thereby preventing damage to the sealing gasket 3 and extending its service life.

[0020] In use: When the product works normally, the working medium enters the spherical filter 7 from the left end inlet of the shell 1, and after being filtered by the spherical filter 7, the valve 2 is pushed open and enters the system from the outlet of the shell 1; when the engine stops, the inlet pressure is zero, and the valve 2 moves to the left under the action of the spring 12. The contact position between the valve 2 and the shell 1 is sealed by the sealing gasket 3, cutting off the oil circuit to prevent the working medium from entering.

[0021] The basic principles, main features and advantages of the present invention are shown and described above. Without departing from the spirit and scope of the present invention, the present invention may also be subject to various changes and improvements, which are all within the scope of the present invention to be protected.

Claims

1. A high-pressure, high-flow composite sealed safety valve, comprising a housing (1), a valve (2), a guide sleeve (4) and a spring seat (5), characterized in that: The valve (2) and the guide sleeve (4) are arranged in the housing (1), the left end of the valve (2) contacts the inner wall of the housing (1) to form a seal, the right end of the valve (2) is inserted into the guide sleeve (4), the spring seat (5) is inserted into the housing (1), a guide portion (13) is arranged at the center of the spring seat (5), the guide portion (13) is inserted into the guide sleeve (4), a spring (12) is arranged between the spring seat (5) and the guide sleeve (4), a sealing gasket (3) is arranged between the sealing gasket (3) and the guide sleeve (4), the cross section of the sealing gasket (3) is arranged as a convex structure, a sealing groove I (14) and a sealing groove II (15) are respectively arranged on the corresponding surfaces between the sealing gasket (3) and the guide sleeve (4), and the inner ring of the sealing gasket (3) is located in the wall formed by the sealing groove I (14) and the sealing groove II (15).

2. A high-pressure, large-flow composite sealed safety valve according to claim 1, characterized in that: A retaining spring II (10) is arranged at the right end of the spring seat (5), a limiting boss I (11) is arranged on the inner wall of the housing (1), and a through hole is arranged in the circumferential direction of the spring seat (5).

3. A high-pressure, large-flow composite sealed safety valve according to claim 1, characterized in that: A filter assembly is arranged on the left side of the valve (2), and the filter assembly comprises a spherical filter (7) and a filter gasket (6). The filter gasket (6) is clamped on the outer circumference of the spherical filter (7). A positioning sleeve (8) is slidably connected to the inner wall of the housing (1). The right end of the positioning sleeve (8) abuts against the filter gasket (6). The right end of the positioning sleeve (8) is fixed in the housing (1) by a retaining spring I (9).

4. A high-pressure, high-flow composite sealed safety valve according to claim 1, characterized in that: A second limiting boss (16) is arranged on the inner side of the sealing groove I (14), and a limiting structure is formed corresponding to the second limiting boss (16) on the inner side of the sealing groove II (15).

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