Oil pipe joint group and mounting method

Abstract

The invention discloses an oil pipe joint group and an installation method, the oil pipe joint group comprises a pipe body, two ends of the pipe body are provided with thread parts, and the thread parts are fixed with an external connecting piece and used for realizing installation with an external joint, a sleeve and other structures; a sealing assembly is further included. The sealing assembly is composed of an adjusting piece and a plugging piece, one end of the plugging piece is located in the pipe body, and the other end of the plugging piece extends out of the pipe body. The outer surface of the plugging piece is connected with the inner wall of the connecting piece in a sealed mode, the inner surface of the plugging piece abuts against the inner wall of the connecting piece, and therefore internal and external dual sealing is achieved. The adjusting piece is arranged between the plugging piece and the adjusting piece; by means of the designed sealing assembly, on the basis that an original sealing ring is reserved, a multi-sealing structure is formed in the connecting position, so that multi-sealing is achieved, the phenomenon of leakage caused by too large liquid pressure in later use is avoided, and meanwhile in long-term use of the sealing assembly, the sealing effect can be guaranteed, and the sealing assembly is not limited by aging of a single material.

Description

Technical Field

[0001] The invention belongs to the technical field of oil pipe joint groups, and in particular relates to an oil pipe joint group and an installation method. Background Art

[0002] Oil pipe joints are components used to connect and seal oil pipes and oil pipes, and oil pipes and hydraulic components in hydraulic systems. The main function of the oil pipe joints is to ensure that the oil in the hydraulic system can flow smoothly, and to maintain sealing under high pressure and vibration environments to prevent oil leakage. Oil pipe joints are widely used in various hydraulic systems, including steel, chemical, power transmission, power plants, petroleum, coal mines, aerospace and other fields. They play a vital role in hydraulic systems to ensure the normal operation and safety of the system.

[0003] The current oil pipe joint assembly mainly relies on the sealing ring at the connection to achieve sealing. Although it can ensure that there will be no leakage, once the sealing ring ages during long-term use, the sealing performance will be reduced and water seepage will occur. Therefore, when used in high-pressure conditions, using a single sealing ring structure will also cause the risk of liquid leakage. Therefore, there are great limitations in actual use and there is room for improvement. Summary of the invention

[0004] The object of the present invention is to provide an oil pipe joint assembly and an installation method to solve the problem of insufficient sealing at the connection of the existing oil pipe joint assembly mentioned in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an oil pipe joint group, including a pipe body, both ends of which are provided with threaded parts, which are fixed to external connecting parts and are used to be installed with external joints and sleeves and other structures; also including a sealing assembly; the sealing assembly is composed of an adjusting member and a plugging member, wherein one end of the plugging member is located inside the pipe body, and the other end extends to the outside of the pipe body; the outer surface of the plugging member is sealed and connected to the inner wall of the connecting part, and the inner surface of the plugging member is against the inner wall of the connecting part, thereby realizing internal and external double sealing; the adjusting member is arranged between the plugging member and the adjusting member, and the other end of the plugging member is moved toward the outside of the pipe body through the adjusting member to realize installation with the external connecting part.

[0006] As a preferred technical solution in the present invention, placement grooves are provided at the openings at both ends of the tube body, and the sealing member is inserted into the placement grooves; the sealing member includes an inner tube, one end of the inner tube is in the shape of a step groove, and a movable groove is provided in the step groove area, the adjusting member is arranged between the step groove and the placement groove, and is used to adjust the position of the inner tube, and a plurality of fitting rings are formed on the inner wall of the other end of the inner tube, and the fitting rings are inclined toward the middle of the tube body. Current connecting parts, such as pipes, have an annular groove at their ends, and the outer wall direction of the annular groove is threadedly connected to the threaded part, and the annular groove is also penetrated by the inner tube, and the fitting ring is pressed against the inner wall direction of the annular groove to achieve secondary sealing.

[0007] As a preferred technical solution in the present invention, an annular groove is further provided on the outer surface of the other end of the inner cylinder, and a rubber ring is sleeved in the annular groove. The rubber ring part protrudes to the outside of the annular groove. Therefore, when connected with the connecting piece, the rubber ring can be pressed against the outer wall of the annular groove to achieve initial sealing.

[0008] As a preferred technical solution in the present invention, the adjusting member is a spring, and the two ends of the spring are respectively against the placement groove and the step groove of the inner tube, so as to achieve the purpose of ejecting the inner tube out of the tube body.

[0009] As a preferred technical solution in the present invention, a limiting protrusion is also fixed on the inner wall of the tube body, and the limiting protrusion is locked at the end of the movable groove to prevent the inner tube from being ejected from the tube body by the spring. During separation or installation, it can be achieved by simply applying pressure to force one end area of ​​the inner tube to deform.

[0010] As a preferred technical solution in the present invention, an annular groove is provided at the other end of the tube body, in which two symmetrical sealing rings are inserted. The sealing rings protrude to the outside of the threaded portion, and the sealing during the connection is achieved by the protruding sealing rings.

[0011] As a preferred technical solution in the present invention, the end of the sealing ring extends along its own curve to form a connecting portion, and the connecting portions on the two sealing rings are distributed in a centrally symmetrical manner, so that the two sealing rings constitute a complete circular ring structure. This segmented structure can easily achieve partial replacement.

[0012] The present invention also discloses a method for installing an oil pipe joint assembly, including the oil pipe joint assembly, and the specific steps are as follows:

[0013] Step 1: first place the spring in the placement groove, then apply pressure to the inner tube, forcing one end of the inner tube to deform and move along the limiting protrusion until the moving groove is outside the limiting protrusion;

[0014] Step 2: Splice the connecting parts at both ends of the sealing ring to form a complete ring, and put it into the annular groove;

[0015] Step 3: During installation, the inner tube is always outside the tube body due to the rebound of the spring, and is threadedly connected to the outer wall of the annular groove at the port of the external pipe connector through the threaded portion. At the same time, the rubber ring is sealed against the outer wall of the annular groove, and the fitting ring is against the inner wall of the annular groove to achieve secondary sealing;

[0016] Step 4: When the pipe body and the connector are connected, the end faces of the two are butted against each other, and the third seal is achieved through the sealing ring.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] Through the designed sealing component, multiple sealing structures are formed inside the connection while retaining the original sealing ring, thereby achieving multiple sealing and avoiding leakage due to excessive liquid pressure in later use. At the same time, the sealing component can also ensure the sealing effect during long-term use, and is not limited by the aging of a single material, thereby improving the shortcomings of existing sealing methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 is a cross-sectional view of the present invention;

[0021] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the middle A area;

[0022] Figure 4 For the present invention Figure 2 A magnified schematic diagram of the middle B area;

[0023] Figure 5 It is a structural schematic diagram of the sealing assembly of the present invention;

[0024] Figure 6 It is a schematic structural diagram of the sealing ring of the present invention.

[0025] In the figure:

[0026] 100, tube body; 101, threaded portion; 102, limiting protrusion; 103, placement groove;

[0027] 200, inner cylinder; 201, fitting ring; 202, spring; 203, moving groove; 204, ring groove; 205, rubber ring;

[0028] 300. Sealing ring; 301. Connecting part. DETAILED DESCRIPTION

[0029] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0030] See also Figures 1 to 6 The present invention provides a technical solution: a tubing joint assembly, comprising

[0031] The tube body 100 has threaded parts 101 at both ends, and the threaded parts 101 are fixed to external connectors for installation with external connectors and sleeves;

[0032] Also includes

[0033] Sealing component; the sealing component is composed of an adjusting member and a sealing member, wherein

[0034] One end of the blocking piece is inside the tube body 100, and the other end extends outside the tube body 100; the outer surface of the blocking piece is sealed with the inner wall of the connecting piece, and the inner surface of the blocking piece is against the inner wall of the connecting piece, thereby achieving internal and external double sealing;

[0035] The adjusting member is disposed between the blocking member and the adjusting member, and the other end of the blocking member is moved toward the outside of the tube body 100 by the adjusting member to achieve installation with an external connecting member.

[0036] In this embodiment, placement grooves 103 are provided at the openings at both ends of the tube body 100, and the sealing member is inserted into the placement groove 103; the sealing member includes an inner tube 200, one end of the inner tube 200 is in the shape of a stepped groove, and a movable groove 203 is provided in the stepped groove area, and an adjusting member is arranged between the stepped groove and the placement groove 103, for adjusting the position of the inner tube 200, and a plurality of fitting rings 201 are formed on the inner wall of the other end of the inner tube 200, and the fitting ring 201 is inclined toward the middle of the tube body 100. Nowadays, the end of the connecting parts, such as pipes, has an annular groove, and the outer wall direction of the annular groove is threadedly connected to the threaded part 101, and the annular groove is also penetrated by the inner tube 200, and the fitting ring 201 is pressed against the inner wall direction of the annular groove to achieve secondary sealing.

[0037] In this embodiment, an annular groove 204 is further provided on the outer surface of the other end of the inner cylinder 200. A rubber ring 205 is sleeved in the annular groove 204. The rubber ring 205 partially protrudes to the outside of the annular groove 204. Therefore, when connected to the connecting piece, the rubber ring 205 can be pressed against the outer wall of the annular groove to achieve initial sealing.

[0038] In this embodiment, the adjusting member is a spring 202 , and two ends of the spring 202 respectively abut against the placement groove 103 and the step groove of the inner tube 200 , thereby achieving the purpose of ejecting the inner tube 200 out of the tube body 100 .

[0039] In this embodiment, a limiting protrusion 102 is also fixed on the inner wall of the tube body 100, and the limiting protrusion 102 is stuck at the end of the movable groove 203 to prevent the inner tube 200 from being ejected from the tube body 100 by the spring 202. During separation or installation, it can be achieved by only applying pressure to force one end area of ​​the inner tube 200 to deform.

[0040] In this embodiment, an annular groove is formed at the other end of the tube body 100, and two symmetrical sealing rings 300 are inserted into the annular groove. The sealing rings 300 protrude to the outside of the threaded portion 101, and the sealing during the connection is achieved by the protruding sealing rings 300.

[0041] In this embodiment, the end of the sealing ring 300 extends along its own curve to form a connecting portion 301. The connecting portions 301 on the two sealing rings 300 are distributed in a centrally symmetrical manner, so that the two sealing rings 300 form a complete circular ring structure. This segmented structure can easily achieve partial replacement.

[0042] The present invention also discloses a method for installing an oil pipe joint assembly, including the oil pipe joint assembly, and the specific steps are as follows:

[0043] Step 1: first place the spring 202 in the placement groove 103, then apply pressure to the inner tube 200, forcing one end of the inner tube 200 to deform and move along the limiting protrusion 102 until the moving groove 203 is outside the limiting protrusion 102;

[0044] Step 2: Splice the connecting parts 301 at both ends of the sealing ring 300 to form a complete ring, and put it into the annular groove;

[0045] Step 3: During installation, the inner tube 200 is rebounded by the spring 202 and is always outside the tube body 100. The inner tube 200 is threadedly connected to the outer wall of the annular groove at the port of the external pipe connector through the threaded portion 101. At the same time, the rubber ring 205 is sealed against the outer wall of the annular groove, and the fitting ring 201 is against the inner wall of the annular groove to achieve secondary sealing.

[0046] Step 4: After the pipe body 100 and the connector are connected, the end faces of the two are butted against each other, and the third sealing is achieved through the sealing ring 300.

[0047] Although embodiments of the present invention have been shown and described (see the above detailed description for details), it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tubing joint assembly, comprising The tube body (100) has threaded portions (101) at both ends, and the threaded portions (101) are fixed to external connecting pieces; Features: Also includes Sealing component; the sealing component is composed of an adjusting member and a blocking member, wherein One end of the blocking piece is located inside the tube body (100), and the other end extends outside the tube body (100); the outer surface of the blocking piece is sealedly connected to the inner wall of the connecting piece, while the inner surface of the blocking piece abuts against the inner wall of the connecting piece; The adjusting member is arranged between the blocking member and the adjusting member.

2. The oil pipe joint assembly according to claim 1, characterized in that: The tube body (100) is provided with placement grooves (103) at both ends of the opening, and the plugging member is inserted into the placement grooves (103); the plugging member comprises an inner tube (200), one end of the inner tube (200) is in the shape of a stepped groove, and a movable groove (203) is provided in the stepped groove region, the adjusting member is arranged between the stepped groove and the placement groove (103), and the inner wall of the other end of the inner tube (200) is formed with a plurality of fitting rings (201), and the fitting rings (201) are inclined toward the middle of the tube body (100).

3. The oil pipe joint assembly according to claim 2, characterized in that: The outer surface of the other end of the inner cylinder (200) is also provided with an annular groove (204), and a rubber ring (205) is sleeved in the annular groove (204), and a portion of the rubber ring (205) protrudes to the outside of the annular groove (204).

4. The oil pipe joint assembly according to claim 2, characterized in that: The adjusting member is a spring (202), and two ends of the spring (202) respectively abut against the placement groove (103) and the step groove of the inner cylinder (200).

5. The oil pipe joint assembly according to claim 4, characterized in that: A limiting protrusion (102) is also fixed on the inner wall of the tube body (100), and the limiting protrusion (102) is locked at the end of the movable groove (203).

6. The oil pipe joint assembly according to claim 1, characterized in that: The other end of the tube body (100) is provided with an annular groove, in which two symmetrical sealing rings (300) are inserted, and the sealing rings (300) protrude to the outside of the threaded portion (101).

7. The oil pipe joint assembly according to claim 6, characterized in that: The end of the sealing ring (300) extends along its own curve to form a connecting portion (301), and the connecting portions (301) on the two sealing rings (300) are distributed in a centrally symmetrical manner.

8. A method for installing a fuel pipe joint assembly, comprising the fuel pipe joint assembly according to any one of claims 1 to 7, characterized in that: The specific steps are as follows: Step 1: firstly place the spring (202) in the placement groove (103), then apply pressure to the inner cylinder (200), forcing one end of the inner cylinder (200) to deform and move along the limiting protrusion (102) until the moving groove (203) is outside the limiting protrusion (102); Step 2: splice the connecting parts (301) at both ends of the sealing ring (300) to form a complete circular ring, and place it into the annular groove; Step 3: During installation, the inner tube (200) is rebounded by the spring (202) and is always outside the tube body (100). The inner tube (200) is threadedly connected to the outer wall of the annular groove at the port of the external pipe connector through the threaded portion (101). At the same time, the rubber ring (205) is sealed against the outer wall of the annular groove, and the fitting ring (201) is against the inner wall of the annular groove to achieve secondary sealing. Step 4: After the pipe body (100) and the connecting piece are connected, the end faces of the two are butted against each other, and a third seal is achieved through the sealing ring (300).

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