Leakage-proof sealing structure for lubricating oil pipeline connection

Abstract

The utility model discloses a lubricating oil pipeline connection leakproof sealing structure which comprises a first pipe body and a second pipe body which are used for conveying lubricating oil, the end portion of the first pipe body and the end portion of the second pipe body are connected together through a detachable connecting piece, and the end portion of the second pipe body is fixedly connected with an inserting pipe. An inserting-connecting groove allowing the inserting-connecting pipe to be connected in an inserted mode is formed in an opening portion of one end of the first pipe body, a sealing piece preventing lubricating oil from leaking is arranged on the outer circle face of the inserting-connecting pipe, and a sealing fixing piece used for fixing the inserting-connecting pipe is arranged in an inner cavity of the inserting-connecting groove. The first pipe body and the second pipe body are in threaded connection through the threaded cover and the external threaded pipe, operation is easy and convenient, an operator only needs to rotate the threaded cover to complete connection and disassembly of the pipe bodies, complex tools and technologies are not needed, and the installation difficulty and the labor cost are reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of anti-leakage sealing structure for lubricating oil pipeline connections, specifically an anti-leakage sealing structure for lubricating oil pipeline connections. Background Technology

[0002] Lubricating oil is a liquid or semi-solid lubricant used in various types of automobiles and mechanical equipment to reduce friction and protect machinery and processed parts. It mainly plays the roles of lubrication, auxiliary cooling, rust prevention, cleaning, sealing and buffering. When the lubricating oil is produced, it needs to be transported to the filling workshop through pipelines.

[0003] According to Chinese Patent No. CN218818736U, a leak-proof conveying pipeline is disclosed. Addressing the problem that existing rubber gaskets are prone to deformation under prolonged temperature differences, and that a single-layer reinforced connection is insufficient for effective leak prevention, the following solution is proposed: It includes two pipelines, with a first connector and a second connector fixedly connected to each pipeline. A rubber ring is fixedly disposed between the first and second connectors, and the first and second connectors are snap-fitted together. A raised ring is integrally formed on the second connector. Compared with existing technologies, this invention has the following advantages: the rubber ring is completely enclosed and fixed inside the groove, preventing deformation and further enhancing the sealing effect between the pipeline joints. The double-layer leak-proof design at the connection provides excellent sealing, avoiding the possibility of leakage at the pipeline joints and ensuring the safe use of the pipeline.

[0004] The aforementioned leak-proof conveying pipelines have some problems in use. Precise alignment and tightening are required during installation, making the operation relatively complex. Maintenance and replacement of sealing components also require the disassembly of multiple parts, increasing maintenance costs and time. Utility Model Content

[0005] The purpose of this invention is to provide a leak-proof sealing structure for lubricating oil pipeline connections to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A leak-proof sealing structure for a lubricating oil pipeline connection includes a first pipe body and a second pipe body for conveying lubricating oil. The ends of the first pipe body and the second pipe body are connected together by a detachable connector. A plug tube is fixedly connected to the end of the second pipe body. A plug groove is provided at one end of the first pipe body for the plug tube to be inserted. A sealing element to prevent lubricating oil leakage is provided on the outer circumferential surface of the plug tube. A sealing and fixing element for fixing the plug tube is provided in the inner cavity of the plug groove.

[0008] The detachable connector includes an annular groove formed on the outer circular surface of the end of the first tube near the second tube. A threaded cover is rotatably fitted inside the annular groove. An external threaded tube is threadedly connected to the inner cavity of the threaded cover. The external threaded tube is fixedly fitted to the end of the second tube.

[0009] As a preferred technical solution, the sealing element includes a sealing ring fixedly connected to the end of the insertion tube. The outer circular surface of the opening of the sealing ring is chamfered. Several sets of grooves are formed on the outer circular surface of the end of the insertion tube near the first tube body. A sealing ring is fitted inside the groove, and the outer circular surface of the sealing ring contacts the inner wall of the insertion groove.

[0010] As a preferred technical solution, the sealing fastener includes two sets of receiving grooves formed on the inner wall surfaces of the upper and lower sides of the end of the first tube. The upper and lower inner cavities of the two sets of receiving grooves are respectively provided with semi-circular retaining rings. The openings of the two sets of semi-circular retaining rings on the same side are arranged opposite each other. The end of the first tube is provided with a pushing component that simultaneously pushes the two sets of semi-circular retaining rings on the same side inward to close their ends. When the ends of the two sets of semi-circular retaining rings on the same side are closed, they can be sealed and locked onto the outer circumference of the insertion tube.

[0011] As a preferred technical solution, the pushing component includes two sets of square grooves formed on the upper and lower surfaces of the end surface of the first tube body. The inner cavities of the two sets of square grooves on the same side are provided with wedge blocks. The opposite ends of the two sets of wedge blocks on the same side are respectively fixedly connected to connecting rods. The ends of the two sets of connecting rods on the same side pass through the corresponding side square grooves and are fixedly connected to the surface of the corresponding side semi-circular retaining ring. The opening of the threaded cap contacts the inclined surface of the wedge block located on the left side.

[0012] As a preferred technical solution, a spring is provided inside each set of square grooves and on the outer circular surface of the connecting rod, with the upper and lower ends of the springs respectively contacting the bottom of the corresponding side wedge block and the bottom inner wall of the square groove.

[0013] As a preferred technical solution, the inner arc surface of the semi-circular retaining ring is provided with a sealing layer.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model, through the setting of detachable connectors, uses a threaded connection method of threaded cap and external threaded pipe for the first pipe body and the second pipe body. The operation is simple and convenient. The operator only needs to rotate the threaded cap to complete the connection and disassembly of the pipe body. No complicated tools and techniques are required, which reduces the installation difficulty and labor costs.

[0016] 2. By setting up the push component, this utility model utilizes the inclined surface cooperation between the threaded cap and the wedge block to realize the linkage between the rotation of the threaded cap and the action of the semi-circular retaining ring. During the process of rotating the threaded cap to connect the pipe body, the movement of the wedge block is automatically triggered, thereby driving the semi-circular retaining ring to close, simplifying the operation steps and improving the installation efficiency.

[0017] 3. This utility model uses a sealing and fixing component, with a semi-circular retaining ring to seal and clamp the connector, further fixing the connector. This not only enhances the stability of the pipe connection but also prevents the connector from shaking. At the same time, the semi-circular retaining ring can tightly fit the outer surface of the connector, preventing the connector from loosening or shifting during the delivery of lubricating oil, thereby avoiding lubricating oil leakage. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the anti-leakage sealing structure for lubricating oil pipeline connection according to the present invention.

[0019] Figure 2 This is a cross-sectional view of the first tube and the second tube of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the second tube body of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the first tube body of this utility model.

[0022] In the picture:

[0023] 100. First tube body; 101. Annular groove; 102. Threaded cap; 103. Second tube body; 104. Insertion groove;

[0024] 200. Square groove; 201. Wedge block; 202. Connecting rod; 203. Spring; 204. Semi-circular retaining ring; 205. Receiving groove;

[0025] 300. External threaded pipe; 301. Insert pipe; 302. Sealing ring; 303. Sealing ring; 304. Groove; 305. Sealing layer. Detailed Implementation

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

[0027] Please see Figure 1-4This embodiment provides a leak-proof sealing structure for a lubricating oil pipeline connection, including a first pipe body 100 and a second pipe body 103 for conveying lubricating oil. The ends of the first pipe body 100 and the second pipe body 103 are connected together by a detachable connector. A plug tube 301 is fixedly connected to the end of the second pipe body 103. A plug groove 104 is provided at one end of the first pipe body 100 for the plug tube 301 to be inserted. A sealing element to prevent lubricating oil leakage is provided on the outer circular surface of the plug tube 301. A sealing and fixing element for fixing the plug tube 301 is provided in the inner cavity of the plug groove 104.

[0028] The detachable connector includes an annular groove 101 formed on the outer circumference of the end of the first tube 100 near the second tube 103. A threaded cover 102 is rotatably fitted inside the annular groove 101. An external threaded tube 300 is threadedly connected to the inner cavity of the threaded cover 102. The external threaded tube 300 is fixedly fitted to the end of the second tube 103. With the detachable connector, the first tube 100 and the second tube 103 are connected by the threaded cover 102 and the external threaded tube 300. The operation is simple and convenient. The operator only needs to rotate the threaded cover 102 to complete the connection and disassembly of the tubes. No complicated tools and techniques are required, which reduces the installation difficulty and labor costs.

[0029] The sealing element includes a sealing ring 303 fixedly connected to the end of the insertion tube 301. The outer circumference of the opening of the sealing ring 303 is chamfered. Several sets of grooves 304 are formed on the outer circumference of the end of the insertion tube 301 near the first tube body 100. A sealing ring 302 is fitted inside the groove 304. The outer circumference of the sealing ring 302 contacts the inner wall of the insertion groove 104. Through the setting of the sealing element, the sealing ring 303 is fixed to the end of the insertion tube 301. Its chamfered design facilitates the insertion of the insertion tube 301 into the insertion groove 104, and at the same time can initially block the insertion. In case of lubricating oil leakage, the sealing ring 302 is fitted into the groove 304 of the insertion pipe 301 and makes close contact with the inner wall of the insertion groove 104, further enhancing the sealing effect. The multi-seal design greatly improves the sealing performance of the pipe connection and reduces the risk of lubricating oil leakage. At the same time, the arrangement of several sets of grooves 304 and sealing rings 302 increases the sealing contact area and sealing layers. Even if one of the sealing rings 302 is slightly damaged or aged, the other sealing rings 302 can still play a sealing role, ensuring the reliability and stability of the seal.

[0030] The sealing and fixing component includes two sets of receiving grooves 205 formed on the inner wall surfaces of the upper and lower sides of the end of the first tube body 100. The upper and lower inner cavities of the two sets of receiving grooves 205 are respectively provided with semi-circular retaining rings 204. The openings of the two sets of semi-circular retaining rings 204 on the same side are arranged opposite each other. The end of the first tube body 100 is provided with a pushing component that pushes the two sets of semi-circular retaining rings 204 on the same side inward at the same time so that their ends are closed. The two sets of semi-circular retaining rings 204 on the same side can be closed and sealed to the outer circular surface of the insertion tube 301. Through the setting of the sealing and fixing component, the semi-circular retaining rings 204 seal and fix the insertion tube 301, which not only enhances the stability of the tube connection, but also prevents the insertion tube 301 from shaking. At the same time, the semi-circular retaining rings 204 can fit tightly to the outer circular surface of the insertion tube 301, preventing the insertion tube 301 from loosening or shifting during the delivery of lubricating oil, thereby avoiding lubricating oil leakage.

[0031] The pushing component includes two sets of square grooves 200 on the upper and lower surfaces of the end surface of the first tube 100. Each set of square grooves 200 on the same side has a wedge-shaped block 201 inside. A connecting rod 202 is fixedly connected to one end of each set of wedge-shaped blocks 201 on the same side. The ends of the connecting rods 202 on the same side pass through the corresponding square grooves 200 and are fixedly connected to the surface of the corresponding semi-circular retaining ring. The opening of the threaded cap 102 contacts the inclined surface of the wedge-shaped block 201 on the left side. By utilizing the engagement between the threaded cap 102 and the inclined surfaces of the wedge-shaped block 201, the rotation of the threaded cap 102 and the movement of the semi-circular retaining ring 204 are linked. During the process of connecting the tube by rotating the threaded cap 102, the movement of the wedge-shaped block 201 is automatically triggered, thereby causing the semi-circular retaining ring 204 to close, simplifying the operation and improving installation efficiency.

[0032] Each set of square grooves 200 is equipped with a spring 203 inside and on the outer circular surface of the connecting rod 202. The upper and lower ends of the spring 203 contact the bottom of the corresponding side wedge block 201 and the bottom inner wall of the square groove 200, respectively. With the spring 203, the threaded cover 102 is rotated in the opposite direction. The pushing force of the threaded cover 102 on the wedge block 201 disappears, the elastic potential energy of the spring 203 is released, and the wedge block 201 is pushed outward, thereby loosening the end of the semi-circular retaining ring 204 from the insertion pipe 301, which facilitates disassembly.

[0033] The inner arc surface of the semi-circular retaining ring 204 is provided with a sealing layer 305. By providing the sealing layer 305, the sealing layer 305 on the inner arc surface of the semi-circular retaining ring 204 increases the sealing performance with the outer arc surface of the insertion tube 301, and reduces the possibility of lubricating oil leakage from the gap between the retaining ring and the insertion tube 301.

[0034] The sealing layer 305 is composed of one or more of the following materials: rubber, silicone, polyurethane, aramid fiber, polytetrafluoroethylene, etc.

[0035] Working principle;

[0036] When the first tube 100 and the second tube 103 need to be connected, the insertion tube 301 at the end of the second tube 103 is aligned with the insertion groove 104 at the port of the first tube 100. When the insertion tube 301 is inserted into the insertion groove 104, the chamfered design of the sealing ring 303 facilitates the smooth insertion of the insertion tube 301. At the same time, the sealing ring 303 can initially prevent lubricating oil from leaking to the outside, thus playing the role of the first line of sealing defense.

[0037] When the connector 301 is inserted into the socket 104, the outer surface of the sealing ring 302 comes into close contact with the inner wall of the socket 104, which further enhances the sealing effect and prevents lubricating oil from leaking from the circumferential gap between the connector 301 and the socket 104.

[0038] Subsequently, the operator rotates the threaded cap 102 toward the end of the second tube 103 to make it threadedly connected with the external threaded tube 300. As the threaded cap 102 is tightened, the first tube 100 and the second tube 103 gradually approach each other and are tightly connected together.

[0039] Meanwhile, as the threaded cap 102 is rotated and gradually tightened with the external threaded tube 300, the opening of the threaded cap 102 will gradually contact the inclined surface of the wedge block 201 located on the left. As the threaded cap 102 continues to be screwed in, the threaded cap 102 generates a pushing force on the inclined surface of the wedge block 201, causing the wedge block 201 to move inward along the square groove 200. At the same time, it compresses the spring 203 in the receiving groove 205. The wedge block 201 pushes the semi-circular retaining ring 204 inward through the connecting rod 202, so that the ends of the two sets of semi-circular retaining rings 204 on the same side gradually close together and finally seal and engage with the outer circular surface of the insertion tube 301, further enhancing the sealing effect and preventing lubricating oil from leaking from the connection between the insertion tube 301 and the first tube body 100.

[0040] When it is necessary to disassemble the first tube body 100 and the second tube body 103, rotate the threaded cover 102 in the opposite direction. The pushing force of the threaded cover 102 on the wedge block 201 disappears, the elastic potential energy of the spring 203 is released, and the wedge block 201 is pushed outward, thereby releasing the end of the semi-circular retaining ring 204 from the insertion tube 301 and resetting it to the inner cavity of the corresponding side receiving groove 205, which facilitates the disassembly operation.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A leak-tight sealing structure for a lubricating oil pipe connection, characterized by, The utility model provides a lubricating oil conveying device, which comprises a first pipe body (100) and a second pipe body (103) for conveying lubricating oil, the end portions of the first pipe body (100) and the second pipe body (103) are connected together through a detachable connector, the end portion of the second pipe body (103) is fixedly connected with a plug-in pipe (301), one end portion of the first pipe body (100) is provided with a plug-in groove (104) for plugging the plug-in pipe (301), the outer circumferential surface of the plug-in pipe (301) is provided with a sealing member for preventing lubricating oil from leaking, and the inner cavity of the plug-in groove (104) is provided with a sealing fixing member for fixing the plug-in pipe (301). The detachable connector comprises an annular groove (101) formed in the outer circumferential surface of the end portion of the first pipe body (100) close to the second pipe body (103), the annular groove (101) is rotatably sleeved with a threaded cover (102), and the inner cavity of the threaded cover (102) is threadedly connected with an external thread pipe (300), and the external thread pipe (300) is fixedly sleeved with the end portion of the second pipe body (103).

2. A leak-tight sealing structure for a lubricating oil pipe connection according to claim 1, characterized in that: The sealing member comprises a sealing ring (303) fixedly connected with the end portion of the plug-in pipe (301), the mouth portion of the sealing ring (303) is provided with an inverted bevel on the outer circumferential surface, a plurality of groups of recesses (304) are formed in the outer circumferential surface of the end portion of the plug-in pipe (301) close to the first pipe body (100), the inner cavities of the recesses (304) are sleeved with sealing rings (302), and the outer circumferential surfaces of the sealing rings (302) are in contact with the inner walls of the plug-in groove (104).

3. A leak-tight sealing structure for a lubricating oil pipe connection according to claim 1, characterized in that: The sealing fixing member comprises two groups of accommodating grooves (205) formed in the inner wall surfaces of the upper and lower sides of the end portion of the first pipe body (100), the inner cavities of the upper and lower sides of the two groups of accommodating grooves (205) are respectively provided with semicircular clamping rings (204), the mouth portions of the two groups of semicircular clamping rings (204) on the same side are oppositely arranged, the end portion of the first pipe body (100) is provided with a pushing assembly for simultaneously pushing the end portions of the two groups of semicircular clamping rings (204) on the same side inward to make the end portions of the two groups of semicircular clamping rings (204) on the same side close to each other, and the end portions of the two groups of semicircular clamping rings (204) on the same side are capable of being sealingly clamped to the outer circumferential surface of the plug-in pipe (301).

4. A leak-tight sealing structure for a lubricating oil pipe connection according to claim 3, characterized in that: The pushing assembly comprises two groups of square grooves (200) formed in the upper and lower side surfaces of the end portion surface of the first pipe body (100), the inner cavities of the two groups of square grooves (200) on the same side are respectively provided with wedge-shaped blocks (201), the opposite ends of the two groups of wedge-shaped blocks (201) on the same side are respectively fixedly connected with connecting rods (202), the ends of the two groups of connecting rods (202) on the same side are respectively penetrated through the square grooves (200) on the corresponding side and fixedly connected to the surfaces of the semicircular clamping rings on the corresponding side, and the mouth portion of the threaded cover (102) is in contact with the inclined surface of the wedge-shaped block (201) on the left side.

5. A lubricating oil pipe connection leak-proof sealing structure according to claim 4, characterized in that: The inner portions of each group of square grooves (200) and the outer circumferential surfaces of the connecting rods (202) are respectively provided with springs (203), and the upper and lower ends of the springs (203) are respectively in contact with the bottom portions of the wedge-shaped blocks (201) on the corresponding side and the inner wall bottoms of the square grooves (200).

6. A leak-tight sealing structure for a lubricating oil pipe connection according to claim 5, characterized in that: The inner arc surface of the semi-circular snap ring (204) is provided with a sealing layer (305).

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