Sealing plug structure and hydraulic element

Abstract

The utility model discloses a sealing plug structure and a hydraulic element, the sealing plug structure comprises a mounting slotted hole, the mounting slotted hole is provided with a mounting hole, and one end of the mounting hole in the first direction is provided with a first limit step; and the plug is at least partially arranged in the mounting hole in a matched mode, a second limiting step is arranged on the side, facing the mounting hole, of the plug, and the second limiting step is matched with the first limiting step in a limiting mode. The first limiting step and the second limiting step are arranged, and the second limiting step is matched with the first limiting step in a limiting manner, so that the pressed and riveted plug can be controlled to be pressed in place, and a gap is prevented from being formed between the pressed and riveted edge and the plug. The plug and the mounting hole are in clearance fit, the second limiting step enables part of the plug to protrude relative to the mounting hole, and due to the same mounting groove hole structure, when the plug is pressed and riveted, bending of the pressing and riveting forming edge is smaller, and the pressing and riveting edge can be prevented from being broken.

Description

Technical Field

[0001] The utility model relates to the technical field of manufacturing of sealing plugs, in particular to a sealing plug structure and a hydraulic component. Background Art

[0002] In the field of manufacturing of hydraulic components, process holes are often made to achieve the connection between different holes, and after the holes are connected, the process hole openings usually need to be blocked.

[0003] In the related art, for some holes smaller than 3 mm, by using a riveting type high-pressure sealing plug, it has the characteristics of stable and reliable quality, good sealing performance, high riveting efficiency, no noise generation, good consistency in riveting and plugging, and no need for a dedicated space for installation, making the integrated valve group have a small space.

[0004] However, in this solution, the diameter of the plug is larger than the process hole and uses an interference fit, so the required riveting force is large, and the bending of the forming edge is large, which easily causes the rupture of the riveting edge and affects the sealing effect. At the same time, there is no limit between the plug and the hole, and it is impossible to control whether the plug is in place after riveting, and there may be a gap between the riveting edge and the plug. Summary of the Utility Model

[0005] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, the utility model provides a sealing plug structure, which can control the plug to be pressed in place after riveting. The plug and the mounting hole adopt a clearance fit, and the bending of the riveting forming edge is smaller, which can avoid the rupture of the riveting edge.

[0006] The utility model further provides a hydraulic component.

[0007] According to the sealing plug structure of the first aspect embodiment of the utility model, it includes: a mounting groove hole, on which a mounting hole is provided, and a first limiting step is provided at one end of the mounting hole in the first direction; a plug, at least part of the plug is fitted in the mounting hole and has a clearance fit with the mounting hole, a second limiting step is provided on the side of the plug facing the mounting hole, and the second limiting step is in limiting fit with the first limiting step.

[0008] According to the sealing plug structure of the embodiment of the utility model, by providing the first limiting step and the second limiting step, and the second limiting step is in limiting fit with the first limiting step, it can control the plug to be pressed in place after riveting and prevent a gap between the riveting edge and the plug. The plug and the mounting hole adopt a clearance fit, and the second limiting step makes part of the plug protrude relative to the mounting hole. With the same mounting groove hole structure, when riveting the plug, the bending of the riveting forming edge is smaller, which can avoid the rupture of the riveting edge.

[0009] According to some embodiments of the present invention, the plug includes: a sealing section and a riveting section, the sealing section and the riveting section are connected to each other, and the outer diameter of the sealing section is smaller than the outer diameter of the riveting section to form the second limiting step between the sealing section and the riveting section.

[0010] According to some embodiments of the present invention, a riveting convex edge is provided on the mounting slot hole, the riveting convex edge forms a matching groove, the matching groove is connected to the mounting hole, the riveting section is located in the matching groove, and the riveting convex edge is attached to the riveting section under the action of the riveting mold.

[0011] According to some embodiments of the present invention, a protrusion is provided at one end of the riveting section away from the sealing section, and the end of the protrusion away from the sealing section is formed into a riveting plane so as to fit on the riveting plane after the riveting protrusion is riveted.

[0012] According to some embodiments of the present invention, the protrusion is formed with a riveting slope on the radial outer side of the riveting section, so that the riveting protrusion fits on the riveting slope after riveting.

[0013] According to some embodiments of the present invention, the angle between the riveting slope and the first direction is α, and α satisfies the relationship: α>10°.

[0014] According to some embodiments of the present invention, there are at least two protrusions, and at least two of the protrusions are spaced apart on the riveting section.

[0015] According to some embodiments of the present invention, the sealing plug structure further includes: a sealing member, a limiting groove is provided on the sealing section, the sealing member is located in the limiting groove and has an interference fit with the inner wall of the mounting hole.

[0016] According to some embodiments of the present invention, there are at least two limiting grooves, and at least two limiting grooves are spaced apart in the first direction of the sealing section. There are at least two sealing members, and at least two sealing members are respectively arranged in at least two limiting grooves.

[0017] The hydraulic element according to the embodiment of the second aspect of the present utility model includes the sealing plug structure.

[0018] The sealing plug structure controls the plug to be properly pressed and installed after riveting by setting a first limiting step and a second limiting step, with the second limiting step and the first limiting step in limiting cooperation, preventing gaps between the edge of the riveted part and the plug. The plug and the installation hole adopt a clearance fit. The second limiting step makes part of the plug protrude relative to the installation hole. For the same installation slot hole structure, when riveting the plug, the bending of the riveting forming edge is smaller, avoiding the rupture of the riveting edge. The riveting die makes the riveting convex edge fit onto the riveting inclined plane and the riveting flat plane. The height from the flange surface of the second limiting step to the riveting surface only needs to be 2 - 3 mm to meet the high-strength burst pressure. Under the same sealing strength, the required space is smaller compared to a conical plug or a threaded plug, enabling a sealing structure with a small space and high pressure resistance. Moreover, the stress area of the riveting flat position is small, and the force required to achieve flattening is relatively small, allowing production with a small press, reducing the production difficulty and cost. The sealing part and the inner wall of the installation hole are in interference fit, ensuring the sealing strength while facilitating installation.

[0019] Additional aspects and advantages of the present utility model will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0021] Figure 1 is a cross-sectional view of the sealing plug structure according to an embodiment of the present utility model;

[0022] Figure 2 is a cross-sectional view of the installation slot hole and the plug before riveting according to an embodiment of the present utility model;

[0023] Figure 3 is a cross-sectional view of the installation slot hole and the plug after riveting according to an embodiment of the present utility model;

[0024] Figure 4 is a schematic structural view of the installation slot hole before riveting according to an embodiment of the present utility model;

[0025] Figure 5 is a schematic structural view of the installation slot hole after riveting according to an embodiment of the present utility model;

[0026] Figure 6 is a schematic structural view of the plug according to an embodiment of the present utility model Figure 1 ;

[0027] Figure 7 is a schematic structural view of the plug according to an embodiment of the present utility model Figure 2 。

[0028] Reference Signs:

[0029] 100, sealing plug structure;

[0030] 10, mounting slot hole; 11, mounting hole; 12, first limiting step; 13, riveting convex edge; 14, mating groove;

[0031] 20, plug; 21, second limiting step; 22, sealing section; 221, limiting groove; 23, riveting section; 231, riveting plane; 232, riveting inclined plane;

[0032] 30, seal;

[0033] 40, riveting die. Detailed Embodiment

[0034] The embodiments of the present invention will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention will be described in detail below.

[0035] Reference will be made below to Figures 1-7 describe the sealing plug structure 100 according to an embodiment of the present invention, and the present invention also proposes a hydraulic component.

[0036] Referring to Figures 1-3 as shown, the sealing plug structure 100 according to an embodiment of the present invention includes: a mounting slot hole 10 and a plug 20.

[0037] A mounting hole 11 is provided on the mounting slot hole 10. A first limiting step 12 is provided at one end of the mounting hole 11 in the first direction. At least a part of the plug 20 is fitted in the mounting hole 11. A second limiting step 21 is provided on the side of the plug 20 facing the mounting hole 11. The second limiting step 21 and the first limiting step 12 are in limiting cooperation.

[0038] Specifically, a first limiting step 12 is provided at the upper end of the axial direction of the mounting hole 11. A part of the structure of the plug 20 is fitted in the mounting hole 11. The riveting die 40 above the mounting slot hole 10 performs riveting on the mounting slot hole 10 and the plug 20. Since a second limiting step 21 is provided on the side of the plug 20 facing the mounting hole 11, and the diameter of the second limiting step 21 is greater than the diameter of the mounting hole 11, the second limiting step 21 and the first limiting step 12 are in limiting cooperation, so that the upper end of the plug 20 can be stuck on the first limiting step 12 of the mounting hole 11. The position of the plug 20 can be fixed during the assembly before riveting, and the position of the plug 20 will not move during the riveting process. In this way, the position of the plug 20 after riveting can be controlled to be pressed in place, which is convenient for riveting and prevents gaps between the edge of the riveting and the plug 20.

[0039] Moreover, the plug 20 and the mounting hole 11 adopt a clearance fit. The second limiting step 21 makes a part of the plug 20 protrude relative to the mounting hole 11. For the same structure of the mounting slot hole 10, when the plug 20 is press riveted, the bending of the press riveting forming edge is smaller, which can avoid the rupture of the press riveting edge.

[0040] Thus, by providing the first limiting step 12 and the second limiting step 21, and the second limiting step 21 and the first limiting step 12 are in limiting cooperation, it is possible to control the plug 20 to be pressed in place after press riveting, and prevent a gap between the press riveting edge and the plug 20. The plug 20 and the mounting hole 11 adopt a clearance fit. The second limiting step 21 makes a part of the plug 20 protrude relative to the mounting hole 11. For the same structure of the mounting slot hole 10, when the plug 20 is press riveted, the bending of the press riveting forming edge is smaller, which can avoid the rupture of the press riveting edge.

[0041] Refer to Figure 6 As shown, the plug 20 includes a sealing section 22 and a press riveting section 23. The sealing section 22 and the press riveting section 23 are connected to each other. The outer diameter of the sealing section 22 is smaller than the outer diameter of the press riveting section 23, so as to form the second limiting step 21 between the sealing section 22 and the press riveting section 23. Specifically, the sealing section 22 is the part fitted in the mounting hole 11, and the press riveting section 23 is the part protruding relative to the mounting hole 11. The main stressed part during the press riveting process is the press riveting section 23. Since the outer diameter of the sealing section 22 is smaller than the outer diameter of the press riveting section 23, the diameter difference between the press riveting section 23 and the sealing section 22 forms the second limiting step 21, which is convenient for restricting the position of the press riveting section 23 and facilitating press riveting.

[0042] Wherein, the surface of the second limiting step 21 facing the mounting hole 11 can be a flange surface, which has a good sealing function, presses the plug 20 and the mounting slot hole 10 tightly together, thereby preventing fluid leakage. In addition, the flange can also withstand high-pressure and high-temperature working environments. For some special processes and fluid media, the flange can be made of different materials to meet different requirements. Finally, the flange also has a certain protective function, which can effectively protect pipelines, equipment and valves from external physical and chemical erosion.

[0043] Refer to Figures 4-5As shown, a riveting boss 13 is provided on the mounting slot hole 10. The riveting boss 13 forms a mating groove 14, and the mating groove 14 communicates with the mounting hole 11. The riveting section 23 is located in the mating groove 14, and the riveting boss 13 is attached to the riveting section 23 under the action of the riveting die 40. The riveting boss 13 is provided above the mounting hole 11. The diameter of the mating groove 14 formed by the riveting boss 13 is equal to or slightly larger than the diameter of the sealing section 22 of the plug 20. Before riveting, the plug 20 is assembled in the mounting slot hole 10, the sealing section 22 is located in the mounting hole 11, the riveting section 23 is located in the mating groove 14, and the riveting die 40 is arranged above the riveting boss 13. Under the action of the riveting die 40, the riveting boss 13 is gradually attached to the riveting section 23 to complete the riveting of the plug 20.

[0044] Referring to Figure 7 As shown, a protrusion is provided at one end of the riveting section 23 away from the sealing section 22, and the end of the protrusion away from the sealing section 22 forms a riveting plane 231 so as to be attached to the riveting plane 231 after the riveting protrusion is riveted. That is, the riveting plane 231 is the stress part where the riveting die 40 presses down the riveting protrusion.

[0045] Since the thickness of the second limiting step 21 of the plug 20 and the thickness of the riveting boss 13 of the mounting slot hole 10 bear the strength of the riveting die 40, the height from the flange surface of the second limiting step 21 to the riveting surface only needs to be 2 - 3 mm to meet the bursting pressure of relatively high strength. Under the same sealing strength, the required space is smaller than that of the conical plug 20 or the threaded plug 20, and a sealing structure with small space and high pressure resistance can be realized.

[0046] Moreover, the stress area of the riveting flat position is small, and the force required for riveting to be flattened is relatively small, so it can be produced by a small press, reducing the production difficulty and cost. [[ID=,12]]

[0047] Referring to [[ID=,15]] Figure 6 As shown, a riveting inclined surface 232 is formed on the radial outer side of the protrusion on the riveting section 23 so as to be attached to the riveting inclined surface 232 after the riveting protrusion is riveted. In this way, when the riveting die 40 bends the riveting boss 13, the riveting boss 13 first bends along the riveting inclined surface 232 and then fits onto the riveting plane 231. The bending angle of the riveting boss 13 is small, and the edge is not easily broken, and the riveting quality is stable and reliable.

[0048] Referring to Figure 6As shown, the included angle between the riveting inclined plane 232 and the first direction is α, and α satisfies the relation: α > 10°. Herein, the first direction is the axial direction of the mounting slot hole 10. When the mounting slot hole 10 is horizontally placed, it is the vertical direction. That is to say, the included angle between the riveting inclined plane 232 and the first direction needs to be greater than 10°. If the included angle between the riveting inclined plane 232 and the first direction is less than or equal to 10°, the inclination angle of the riveting inclined plane 232 is too large, the bending angle at the riveting plane 231 becomes larger, which easily causes the breakage of the edge of the riveting protrusion, affecting the riveting quality and the sealing effect.

[0049] Referring to Figure 7 As shown, there are at least two protrusions, and the at least two protrusions are spaced apart on the riveting section 23. The at least two protrusions can ensure that there are at least two riveting planes 231, and there is sufficient pressing area during the riveting process to ensure the pressing strength and have good sealing performance. Also, the number of riveting planes 231 can be three, four or more. Increasing the number of riveting planes 231 can improve the riveting strength. In this embodiment, the number of riveting planes 231 is 4. In some other embodiments, the riveting plane 231 can be a strip-shaped riveting plane 231, and the strip-shaped riveting plane 231 extends along the diameter direction of the plug 20, increasing the pressing area and better fixing the plug 20 in the mounting slot hole 10.

[0050] Referring to Figures 1-3 and Figure 6 As shown, the seal plug structure 100 further includes: a seal 30. A limiting groove 221 is provided on the sealing section 22, and the seal 30 is located in the limiting groove 221 and is in interference fit with the inner wall of the mounting hole 11. Specifically, the compression rate of the sealing ring is controlled between 10% - 35% to ensure the sealing strength and convenient installation.

[0051] Wherein, the seal 30 can be a sealing ring, and using a sealing ring for sealing is more efficient and fast during pre-installation.

[0052] Also, there are at least two limiting grooves 221, and the at least two limiting grooves 221 are spaced apart in the first direction of the sealing section 22. There are at least two seals 30, and the at least two seals 30 are respectively arranged in the at least two limiting grooves 221. Since the plug 20 and the mounting hole 11 are in clearance fit, setting multiple limiting grooves 221 and multiple seals 30 can improve the sealing effect between the plug 20 and the mounting hole 11. When one seal 30 fails, the other seals 30 can still function, improving the reliability of the seal plug structure 100.

[0053] The hydraulic component according to the second aspect embodiment of the present utility model includes the seal plug structure 100.

[0054] The sealing plug structure 100 can control the plug 20 after press riveting to be pressed in place and prevent gaps between the edge of the press riveting and the plug 20 by setting the first limiting step 12 and the second limiting step 21, and the second limiting step 21 is in limiting cooperation with the first limiting step 12. The plug 20 and the mounting hole 11 are in clearance fit. The second limiting step 21 makes a part of the plug 20 protrude relative to the mounting hole 11. For the same structure of the mounting slot hole 10, when press riveting the plug 20, the bending of the press riveting forming edge is smaller, which can avoid the rupture of the press riveting edge. The press riveting die 40 makes the press riveting convex edge 13 fit onto the press riveting inclined plane 232 and the press riveting flat plane 231. The height from the flange surface of the second limiting step 21 to the press riveting surface only needs to be 2-3 mm to meet the high-strength bursting pressure. Under the same sealing strength, the required space is smaller compared to the conical plug 20 or the threaded plug 20, and a sealing structure with a small space and high pressure resistance can be realized. Moreover, the stress area of the press riveting flat position is small, and the force required for pressing flat is also relatively small, which can be realized by using a small press to produce, reducing the production difficulty and cost. The seal 30 is in interference fit with the inner wall of the mounting hole 11 to ensure the sealing strength and is convenient for installation.

[0055] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 construed as a limitation of the present invention.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0057] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A sealing plug structure, characterized in that, include: A mounting slot (10), wherein a mounting hole (11) is provided on the mounting slot (10), and a first limiting step (12) is provided at one end of the mounting hole (11) in a first direction; A plug (20) is provided, wherein the plug (20) is at least partially fitted in the mounting hole (11) and has a clearance fit with the mounting hole (11); a second limiting step (21) is provided on a side of the plug (20) facing the mounting hole (11); the second limiting step (21) is limitedly fitted with the first limiting step (12).

2. The sealing plug structure according to claim 1, characterized in that The plug (20) comprises a sealing section (22) and a pressure riveting section (23), wherein the sealing section (22) and the pressure riveting section (23) are connected to each other, and the outer diameter of the sealing section (22) is smaller than the outer diameter of the pressure riveting section (23), so as to form the second limiting step (21) between the sealing section (22) and the pressure riveting section (23).

3. The sealing plug structure according to claim 2, wherein, A pressure riveting convex edge (13) is provided on the installation slot hole (10), and the pressure riveting convex edge (13) forms a matching groove (14). The matching groove (14) and the installation hole (11) are communicated, and the pressure riveting section (23) is located in the matching groove (14). The pressure riveting convex edge (13) is attached to the pressure riveting section (23) under the action of the pressure riveting die (40).

4. The sealing plug structure according to claim 3, characterized in that, The end of the rivet section (23) facing away from the sealing section (22) is provided with a protrusion, and the end of the protrusion away from the sealing section (22) is formed into a rivet plane (231) so as to fit on the rivet plane (231) after the rivet protrusion is riveted.

5. The structure of the sealing plug (20) according to claim 4, characterized in that, The protrusion is formed with a riveting slope (232) on the radial outer side of the riveting section (23), so as to fit on the riveting slope (232) after the riveting protrusion is riveted.

6. The sealing plug structure according to claim 5, characterized in that, The included angle between the riveting slope (232) and the first direction is α, and α satisfies the relationship: α>10°.

7. The structure of the sealing plug (20) according to claim 4, characterized in that, There are at least two protrusions, and at least two of the protrusions are spaced apart on the riveting section (23).

8. The sealing plug structure according to claim 2, wherein Also includes: A sealing member (30) is provided with a limiting groove (221) on the sealing section (22), and the sealing member (30) is located in the limiting groove (221) and is interference-fitted with the inner wall of the mounting hole (11).

9. The sealing plug structure according to claim 8, wherein, There are at least two limiting grooves (221), and at least two limiting grooves (221) are spaced apart in the first direction of the sealing section (22); there are at least two sealing members (30), and at least two sealing members (30) are respectively arranged in at least two limiting grooves (221).

10. A hydraulic component, characterized in that, include: The sealing plug structure according to any one of claims 1 to 9.

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