Hydraulic plug sealing structure

Abstract

The utility model discloses a hydraulic plug sealing structure, which relates to the technical field of sealing structures and comprises a plug inner hole, a threaded hole and a column head inner hole which are communicated with each other, and a conical surface plug, a threaded handle and a column head which are connected with each other are arranged in the plug inner hole, the threaded hole and the column head inner hole. A conical sealing ring is embedded in the inclined face of the conical face plug, an annular clearance space is formed at the connecting end of the conical face plug and the threaded handle, a movable limiting ring and a rubber sleeve are arranged in the clearance space and are both located on the inner side of the threaded hole, and when the limiting ring moves towards the threaded handle under the liquid pressure, the rubber sleeve deforms, so that the conical face plug is sealed. And the inner surface of the threaded hole is compressed. Through the combined arrangement of the limiting ring and the rubber sleeve, the sealing performance when the threaded handle is connected with the threaded hole can be kept, and the phenomenon that the threaded handle is loosened due to the fact that liquid leaks into the threaded hole is effectively avoided. A plurality of sealing structures can be formed by combining the conical sealing ring and the O-shaped gasket which are positioned in front of and behind the limiting ring, so that the risk of oil leakage is effectively reduced.

Description

Technical Field

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

[0002] A plug seal is used to prevent liquid or gas leakage from a connection. Common sealing structures include O-rings, gaskets, thread seals, and adhesive seals. O-rings are the most common type of seal. They are circular rings made of rubber and offer excellent sealing and wear resistance. Gaskets fill the gap between two connecting parts to prevent liquid or gas leakage. Thread seals are achieved by adding sealant to threaded connections and offer excellent sealing and pressure resistance. Adhesive seals are achieved by applying glue to the connection and offer excellent sealing and temperature resistance.

[0003] With existing plug seals, the sealing material tends to wear over time as the hydraulic structure ages, making it difficult for maintenance personnel to detect wear and tear. Consequently, as the seal wears and ages, its sealing performance against the hydraulic structure is compromised. When liquid leaks, the seal is unable to withstand the pressure, causing some liquid to overflow and compromising the hydraulic seal. Utility Model Content

[0004] In response to the above problems, the present application provides a hydraulic plug sealing structure.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a hydraulic plug sealing structure, comprising a connected plug inner hole, a threaded hole and a column inner hole, wherein the plug inner hole, the threaded hole and the column inner hole are provided with a connected conical plug, a threaded handle and a column.

[0006] A conical sealing ring is embedded on the inclined surface of the conical plug, and an annular gap space is formed between the conical plug and the connecting end of the threaded shank. A movable limiting ring and a rubber sleeve are provided in the gap space. The limiting ring and the rubber sleeve are both located on the inner side of the threaded hole. When the limiting ring moves toward the threaded shank under liquid pressure, the rubber sleeve is deformed and pressed against the inner surface of the threaded hole.

[0007] Furthermore, the opening position of the rubber sleeve is fixed on the surface of the threaded handle, and a spring piece is provided on the surface of the threaded handle. The spring piece has an arc-shaped structure, and the raised part of the spring piece is facing the limiting ring. When the limiting ring moves to squeeze the rubber sleeve, the spring piece extends toward the outside of the threaded handle.

[0008] Furthermore, a collar is embedded in the spring piece, and a guide column is connected to the inner thread of the collar. One end of the guide column close to the limiting ring abuts against the inner surface of the rubber sleeve.

[0009] Furthermore, an annular receiving groove is provided on the side of the conical plug facing the threaded shank, and the inner wall of the receiving groove is connected to the limiting ring through a pressure spring.

[0010] Furthermore, an O-type gasket is embedded in the surface of the column head, and the O-type gasket is fitted to the inner surface of the inner hole of the column head.

[0011] Furthermore, a hexagonal countersunk hole is provided on one side of the column head that is exposed from the column head inner hole.

[0012] In summary, the technical effects and advantages of the utility model are:

[0013] This new design, through the combination of a retaining ring and a rubber sleeve, maintains a tight seal between the threaded shank and the threaded hole, effectively preventing the shank from loosening due to liquid leaking into the threaded hole. Combined with the tapered sealing rings and O-rings located in front and behind the retaining ring, a multi-stage sealing structure is formed, effectively reducing the risk of oil leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model.

[0017] Figure 3 For this utility model Figure 2 Schematic diagram of the structure at point A in the middle.

[0018] Figure 4 This is a schematic diagram of the corresponding installation structure of the utility model.

[0019] Figure 5 This is a schematic diagram of the structure after the utility model is assembled with the installation structure.

[0020] In the figure: 1. Conical plug; 11. Inner hole of plug; 2. Conical sealing ring; 3. Threaded shank; 31. Threaded hole; 4. Stud; 41. Inner hole of stud; 5. O-ring; 6. Hexagonal countersunk hole; 7. Limiting ring; 101. Storage groove; 102. Rubber sleeve; 8. Pressure spring; 9. Shrapnel; 10. Guide column. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example: Reference Figure 1-5 The hydraulic plug sealing structure shown includes a connected plug inner hole 11, a threaded hole 31 and a column inner hole 41. The plug inner hole 11, the threaded hole 31 and the column inner hole 41 are provided with a connected conical plug 1, a threaded handle 3 and a column 4. During the actual installation process, the column 4 is rotated to gradually connect the threaded handle 3 with the threaded hole 31 until the conical plug 1 moves into the plug inner hole 11.

[0023] A conical sealing ring 2 is embedded in the inclined surface of the conical plug 1. An annular gap is formed between the conical plug 1 and the connection end of the threaded shank 3. A movable retaining ring 7 and a rubber sleeve 102 are located within this gap. Both the retaining ring 7 and the rubber sleeve 102 are located inside the threaded hole 31. If liquid leaks, pressure is applied to the retaining ring 7. When the retaining ring 7 moves toward the threaded shank 3 under the pressure of the liquid, the rubber sleeve 102 deforms and presses against the inner surface of the threaded hole 31.

[0024] like Figure 2 、 Figure 3 As shown, the opening position of the rubber sleeve 102 is fixed on the surface of the threaded handle 3. A spring piece 9 is provided on the surface of the threaded handle 3. The spring piece 9 has an arc-shaped structure, and the raised portion of the spring piece 9 is facing the limiting ring 7. When the limiting ring 7 moves to squeeze the rubber sleeve 102, the spring piece 9 extends toward the outside of the threaded handle 3, squeezing the rubber sleeve 102 to cause deformation, so that the rubber sleeve 102 is pressed tightly against the inner wall of the threaded hole 31.

[0025] Therefore, the combination of the retaining ring 7 and the rubber sleeve 102 maintains a tight seal between the threaded shank 3 and the threaded hole 31, effectively preventing the threaded shank 3 from loosening due to liquid leaking into the threaded hole 31. Combined with the conical sealing ring 2 located in front of the retaining ring 7, a multi-pass sealing structure is formed, effectively reducing the risk of oil leakage.

[0026] like Figure 3As shown, when the limiting ring 7 moves and squeezes the rubber sleeve 102, in order to make the rubber sleeve 102 deform quickly, a collar is embedded in the spring piece 9, and a guide post 10 is connected to the inner thread of the collar. The end of the guide post 10 close to the limiting ring 7 abuts the inner surface of the rubber sleeve 102. Therefore, when the limiting ring 7 moves and squeezes the rubber sleeve 102, the guide post 10 moves quickly. Under the pulling force of the guide post 10, the spring piece 9 can be stretched toward the outside of the threaded shank 3, causing the rubber sleeve 102 to deform and press against the inner wall of the threaded hole 31.

[0027] like Figure 3 As shown, an annular receiving groove 101 is defined on the side of the conical plug 1 facing the threaded shank 3. The inner wall of the receiving groove 101 is connected to the retaining ring 7 via a pressure spring 8. In its natural state, the pressure spring 8 maintains the tight connection between the retaining ring 7 and the threaded hole 31. When the pressure of the leaking liquid exceeds the pressure exerted by the pressure spring 8 on the retaining ring 7, the retaining ring 7 moves under the pressure.

[0028] like Figure 2 As shown, an O-ring 5 is embedded in the surface of the column head 4, and the O-ring 5 is attached to the inner surface of the column head inner hole 41. The connection between the O-ring 5 and the column head inner hole 41 can be located on the column head 4 to perform a further sealing operation, thereby improving the sealing performance when the column head 4 is connected to the column head inner hole 41.

[0029] like Figure 2 As shown, in order to facilitate the installation operation of the threaded handle 3 and the conical plug 1, a hexagonal countersunk hole 6 is opened on the side of the column head 4 where the column head inner hole 41 is exposed.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hydraulic plug sealing structure, characterized by: The invention comprises a plug inner hole (11), a threaded hole (31) and a column inner hole (41) which are connected to each other, wherein the plug inner hole (11), the threaded hole (31) and the column inner hole (41) are provided with a connected conical plug (1), a threaded handle (3) and a column (4); A conical sealing ring (2) is embedded on the inclined surface of the conical plug (1), and an annular gap space is formed between the conical plug (1) and the connecting end of the threaded shank (3), and a movable limiting ring (7) and a rubber sleeve (102) are provided in the gap space. The limiting ring (7) and the rubber sleeve (102) are both located inside the threaded hole (31). When the limiting ring (7) moves toward the threaded shank (3) under liquid pressure, the rubber sleeve (102) is deformed and pressed against the inner surface of the threaded hole (31).

2. The hydraulic plug sealing structure according to claim 1, characterized in that: The opening position of the rubber sleeve (102) is fixed on the surface of the threaded shank (3). The surface of the threaded shank (3) is provided with a spring piece (9). The spring piece (9) has an arc-shaped structure, and the raised portion of the spring piece (9) faces the limiting ring (7). When the limiting ring (7) moves to squeeze the rubber sleeve (102), the spring piece (9) extends toward the outside of the threaded shank (3).

3. The hydraulic plug sealing structure according to claim 2, characterized in that: A collar is embedded in the spring piece (9), and a guide column (10) is connected to the inner thread of the collar. One end of the guide column (10) close to the limiting ring (7) abuts against the inner surface of the rubber sleeve (102).

4. The hydraulic plug sealing structure according to claim 1, characterized in that: An annular receiving groove (101) is provided on the side of the conical plug (1) facing the threaded shank (3), and the inner wall of the receiving groove (101) is connected to the limiting ring (7) via a pressure spring (8).

5. The hydraulic plug sealing structure according to claim 1, characterized in that: An O-type gasket (5) is embedded in the surface of the column head (4), and the O-type gasket (5) is fitted on the inner surface of the column head inner hole (41).

6. The hydraulic plug sealing structure according to claim 1, characterized in that: A hexagonal countersunk hole (6) is provided on one side of the column head (4) that is exposed from the column head inner hole (41).

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