Self-centering high-pressure pressure control valve

Abstract

The utility model discloses a self-centering high-pressure pressure control valve, and relates to the technical field of pressure control valves, the self-centering high-pressure pressure control valve comprises a plug, a valve cover, a hexagonal nut with a disc, a shell and a valve sleeve, an insert is arranged in the plug, the plug is upwards connected with the valve cover, the right side of the valve cover is connected with the shell, the left end of the shell is inserted between the plug and the valve cover, and the valve sleeve is arranged in the plug. An O-shaped ring I is arranged between the shell and the valve cover; the sealing face of the valve cover and the shell is of an arc-shaped structure. According to the self-centering high-pressure pressure control valve, plane sealing of the valve sleeve and the shell is changed into an arc face sealing structure, in the screwing process of the hexagonal nut with the disc, the perpendicularity of the high-pressure sealing face and the hexagonal nut with the disc is automatically aligned due to the fact that the high-pressure sealing face of the valve sleeve is affected by the screwing force value, and the sealing effect is good. And the high-pressure sealing surface is completely and uniformly attached to the mounting surface of the high-pressure oil pump or the common rail pipe, so that the leakage risk of a high-pressure sealing area of a product is reduced, and the product can reach the highest pressure of 260Mpa of the foreign manufacturing level.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure control valves, in particular to a self-centering high-pressure pressure control valve. Background Art

[0002] DRV pressure control valve is a high-pressure diesel pressure control valve for diesel engines. The maximum pressure reaches 260Mpa and the manufacturing precision requirements are very high. Figure 2 The valve is a mechanical high-pressure sealing structure, installed on the diesel high-pressure oil pump or the common rail pipe of the diesel engine. By tightening the hexagonal nut with disc on the DRV pressure control valve, the end face of the valve sleeve and the end face of the common rail pump or the common rail pipe form a mechanical high-pressure sealing area. It is required to make the common rail pressure maximum 260Pma under the drive of electromagnetic force.

[0003] The DRV pressure control valve manufactured in China is generally around 220Mpa, which cannot reach the required maximum pressure of 260Mpa, and there is still a certain gap with the products manufactured abroad. Due to the uniqueness of its structure, the pressure is ultra-high pressure, so the product manufacturing precision is very high. When the processing precision is insufficient and the processing technology is immature, the risk of product failure is very high, and the resulting production scrap rate will also be very high. The particularity of its structure requires that in addition to meeting the requirements of the outline size during the product manufacturing process, it is also necessary to ensure the shape and position tolerance of the product manufacturing. The parallelism of the upper and lower end faces of the valve sleeve itself, and the verticality of the bottom of the valve sleeve mounting hole on the shell and the hexagonal nut with a disc will affect the high-pressure sealing effect of the product.

[0004] Therefore, in order to reduce the risk of product failure, the utility model proposes a self-centering high-pressure pressure control valve, which changes the plane seal between the valve sleeve and the shell into an arc surface seal structure to solve the above-mentioned problem. Utility Model Content

[0005] The utility model aims to solve the problems in the prior art and provides a self-centering high-pressure pressure control valve.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: a self-centering high-pressure pressure control valve, including a plug, a plug-in, a valve cover, an O-ring 1, an armature, a coil skeleton, an enameled wire, a hexagonal nut with a disc, an O-ring 2, a shell, a valve sleeve, a filter screen, a steel ball, a retaining spring, and a push rod.

[0007] The plug is set as an injection molding structure, a plug is set in the plug, the plug is connected to the valve cover upward, the right side of the valve cover is connected to the shell, the left end of the shell is inserted between the plug and the valve cover, and an O-ring is set between the shell and the valve cover; the sealing surface of the valve cover and the shell is set as an arc structure;

[0008] A hexagonal nut with a disk is sleeved on the outer wall of the middle part of the shell, a retaining ring is arranged between the hexagonal nut with a disk and the shell, a groove is arranged on the outer surface of the shell for placing the retaining ring, a valve sleeve is installed on the right end of the shell, a filter screen is installed on the right side of the valve sleeve, a steel ball is arranged on the left side of the valve sleeve, and a push rod is installed on the left side of the steel ball.

[0009] Furthermore, an O-ring 2 is sleeved on the outer shell on the right side of the hexagonal nut with a disk.

[0010] Furthermore, an armature is sleeved on the outer side of the left side of the push rod, and the armature is installed on the right side of the valve cover.

[0011] Furthermore, a coil skeleton and an enameled wire are installed in sequence in the shell on the right side of the armature.

[0012] Compared with the prior art, the advantages and positive effects of the utility model are: the self-centering high-pressure pressure control valve changes the flat seal between the valve sleeve and the outer shell into an arc surface sealing structure. During the tightening process of the hexagonal nut with a disc, the high-pressure sealing surface of the valve sleeve is affected by the tightening force value, and the verticality of the high-pressure sealing surface and the hexagonal nut with a disc is automatically aligned, so that the high-pressure sealing surface is evenly fitted on the installation surface of the high-pressure oil pump or the common rail pipe, reducing the risk of leakage in the high-pressure sealing area of ​​the product, so that the product can reach the maximum pressure of 260Mpa at the same level as foreign manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the existing valve structure mentioned in the background technology.

[0015] Legend: 1. Plug, 2. Plug-in, 3. Valve cover, 4. O-ring 1, 5. Armature, 6. Coil frame, 7. Enameled wire, 8. Hexagonal nut with disc, 9. O-ring 2, 10. Housing, 11. Valve sleeve, 12. Filter, 13. Steel ball, 14. Retaining ring, 15. Push rod. DETAILED DESCRIPTION

[0016] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0017] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0018] like Figure 1 As shown, the utility model provides a self-centering high-pressure pressure control valve, including a plug 1, a plug 2, a valve cover 3, an O-ring 4, an armature 5, a coil skeleton 6, an enameled wire 7, a hexagonal nut with a disc 8, an O-ring 9, a housing 10, a valve sleeve 11, a filter screen 12, a steel ball 13, a retaining spring 14, and a push rod 15.

[0019] The plug 1 is set as an injection molding structure, a plug 2 is set in the plug 1, the plug 1 is connected to the valve cover 3 upwards, the right side of the valve cover 3 is connected to the shell 10, the left end of the shell 10 is inserted between the plug 1 and the valve cover 3, and an O-ring 4 is set between the shell 10 and the valve cover 3; the sealing surface of the valve cover 3 and the shell 10 is set as an arc structure; the plane seal of the valve sleeve 3 and the shell 10 is changed to an arc surface sealing structure. In the process of tightening the hexagonal nut with a disc, the high-pressure sealing surface of the valve sleeve is affected by the tightening force value, and the verticality of the high-pressure sealing surface and the hexagonal nut with a disc is automatically aligned, so that the high-pressure sealing surface is evenly attached to the installation surface of the high-pressure oil pump or the common rail pipe, reducing the risk of leakage in the high-pressure sealing area of ​​the product, so that the product can reach the highest pressure of 260Mpa with the foreign manufacturing level;

[0020] A hexagonal nut 8 with a disc is sleeved on the outer wall of the middle part of the shell 10, a retaining ring 14 is arranged between the hexagonal nut 8 with a disc and the shell 10, a groove is arranged on the outer surface of the shell 10 for placing the retaining ring 14, an O-ring 29 is sleeved on the shell 10 on the right side of the hexagonal nut 8 with a disc, a valve sleeve 11 is installed on the right end of the shell 10, a filter screen 12 is installed on the right side of the valve sleeve 11, a steel ball 13 is arranged on the left side of the valve sleeve 11, a push rod 15 is installed on the left side of the steel ball 13, an armature 5 is sleeved on the outer side of the left side of the push rod 15, the armature 5 is installed on the right side of the valve cover 3, and a coil skeleton 6 and an enameled wire 7 are installed in sequence in the shell on the right side of the armature 5.

[0021] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any technician familiar with the profession may use the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes and apply them to other fields. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A self-centering high-pressure pressure control valve, comprising a plug (1), a plug (2), a valve cover (3), an O-ring (4), an armature (5), a coil skeleton (6), an enameled wire (7), a hexagonal nut with a disc (8), an O-ring (9), a housing (10), a valve sleeve (11), a filter (12), a steel ball (13), a retaining spring (14), and a push rod (15), characterized in that: The plug (1) is configured as an injection molding structure, a plug (2) is provided inside the plug (1), the plug (1) is connected to the valve cover (3) upwards, the right side of the valve cover (3) is connected to the outer shell (10), the left end of the outer shell (10) is inserted between the plug (1) and the valve cover (3), an O-ring (4) is provided between the outer shell (10) and the valve cover (3); the sealing surface between the valve cover (3) and the outer shell (10) is configured as an arc structure; A hexagonal nut with a disk (8) is sleeved on the outer wall of the middle part of the shell (10), a retaining ring (14) is arranged between the hexagonal nut with a disk (8) and the shell (10), a groove is arranged on the outer surface of the shell (10) for accommodating the retaining ring (14), a valve sleeve (11) is installed at the right end of the shell (10), a filter screen (12) is installed on the right side of the valve sleeve (11), a steel ball (13) is arranged on the left side of the valve sleeve (11), and a push rod (15) is installed on the left side of the steel ball (13).

2. A self-centering high pressure control valve according to claim 1, characterized in that: The outer shell (10) on the right side of the hexagonal nut (8) with a disk is covered with an O-ring 2 (9).

3. A self-centering high pressure control valve according to claim 1, characterized in that: An armature (5) is sleeved on the outer side of the left side of the push rod (15), and the armature (5) is installed on the right side of the valve cover (3).

4. A self-centering high pressure control valve according to claim 1, characterized in that: A coil frame (6) and an enameled wire (7) are sequentially installed in the housing on the right side of the armature (5).

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