CN109058618B

CN109058618B - Pipe joint

Info

Publication number: CN109058618B
Application number: CN201811143800.3A
Authority: CN
Inventors: 邱梅
Original assignee: Suzhou Dandun Electromechanical Co ltd
Current assignee: Suzhou Dandun Electromechanical Co ltd
Priority date: 2018-09-28
Filing date: 2018-09-28
Publication date: 2020-06-05
Anticipated expiration: 2038-09-28
Also published as: CN109058618A

Abstract

The invention discloses a pipe joint, which comprises a joint body (10), a pipe body (30) and a screwing nut (50) sleeved on the pipe body (30), wherein the joint body (10) is provided with a first matching surface (13), the pipe body (30) is provided with a second matching surface (32) matched with the first matching surface (13), and the screwing nut (50) is connected with and tensions the joint body (10) and the pipe body (30), and is characterized in that: the joint body (10) further comprises a fastening part (12) and a first rubber pad (70) arranged on the side face of the fastening part (12), an annular first blade part (55) is arranged on the side face of the screwing nut (50), the first blade part (55) can be squeezed and inserted into the first rubber pad (70), the pipe body (30) comprises a pipe part (31), a shoulder part (34) arranged at one end of the pipe part (31) and a second rubber pad (71) arranged on the side face of the shoulder part (34), and the screwing nut (50) is further provided with a second blade part (57) which can be squeezed and inserted into the second rubber pad (71).

Description

Pipe joint

Technical Field

The present invention relates to a pipe joint.

Background

The pipe joint is a part for connecting a pipeline in a hydraulic system or installing the pipeline on a hydraulic component, and is widely applied to the hydraulic system. Fig. 1 shows a conventional pipe joint in the prior art, which includes a joint body 10, a pipe body 30 and a screwing nut 100, wherein the screwing nut 100 makes the joint body 10 and the pipe body 30 abut against each other to complete the connection between the joint body 10 and the pipe body 30, however, after a period of use or after vibration occurs, the screwing nut 100 is easily loosened, which causes poor sealing between the mating surfaces of the joint body 10 and the pipe body 30 and leakage, and at this time, a large amount of leaked liquid easily seeps out of the pipe joint to pollute the environment.

Disclosure of Invention

The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a pipe joint in which, even when liquid leaks from the fitting surface of the joint body and the pipe body, the liquid is less likely to leak out of the pipe joint.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a pipe joint, locates including the joint body, body and cover nut of screwing on the body, the joint body is provided with first fitting surface, the body be provided with first fitting surface complex second fitting surface, the nut of screwing connects and is taut the joint body and body, the joint body still includes fastening position and sets up the first rubber pad of fastening position side, the nut of screwing side is provided with annular first cutting part, first cutting part can extrude and insert first rubber pad, the body include pipe portion, set up in the shoulder of pipe portion one end and set up in the second rubber pad of shoulder side, the nut of screwing still is provided with can extrude and insert the second cutting part of second rubber pad.

In addition, the invention also provides the following auxiliary technical scheme:

the first rubber pad is attached to the side face of the fastening part.

The first rubber pad is detachably connected with the fastening part.

The fastening part further comprises a convex ring and a gland in threaded connection with the convex ring, and the first rubber pad is pressed on the convex ring through the gland.

The convex ring is provided with an embedded groove for accommodating the first rubber pad, the gland is provided with a pressing plate protruding inwards, and the pressing plate presses the first rubber pad in the embedded groove.

The second rubber pad is detachably connected with the shoulder.

The shoulder portion is provided with a first engaging portion, and the second rubber pad is provided with a second engaging portion engaged with the first engaging portion.

The screwing nut is provided with an inner ring protruding inwards, and the second blade part is arranged on the side surface of the inner ring.

The first matching surface and the second matching surface are conical surfaces.

The outer surface of the joint body is provided with fastening threads, and the screwing nut is provided with internal threads matched with the fastening threads.

Compared with the prior art, the invention has the advantages that: according to the pipe joint, the first rubber pad is arranged on the joint body, the second rubber pad is arranged on the pipe body, and the first blade part capable of being extruded and inserted into the first rubber pad and the second blade part capable of being extruded and inserted into the second rubber pad are arranged on the screwing nut, so that liquid is difficult to seep out of the pipe joint after leaking from the matching surface of the joint body and the pipe body, and the sealing performance is better.

Drawings

Fig. 1 is a schematic view of a pipe joint in the prior art.

Fig. 2 is a schematic view of the structure of the joint body of the present invention.

Fig. 3 is a schematic structural view of the rubber gasket of the present invention attached to the joint body.

FIG. 4 is a schematic view of the connection between the tube and the rubber pad of the present invention.

Fig. 5 is a schematic view of the structure of the tube and the tightening nut of the present invention.

Fig. 6 is a schematic view of the detachable connection of the rubber pad to the joint body in the present invention.

Detailed Description

The present invention will be described in further non-limiting detail with reference to the following preferred embodiments and accompanying drawings.

As shown in fig. 2 to 5, a pipe joint according to a preferred embodiment of the present invention includes a joint body 10, a pipe body 30, a tightening nut 50, a first rubber gasket 70 and a second rubber gasket 71.

As shown in fig. 2, a pipe thread 11 connected to a metal pipe (not shown) is provided at one end of a coupling body 10, and a fastening portion 12 having a hexagonal cross-section is provided at the middle thereof, and the fastening portion 12 can be clamped by a tool such as a spanner to facilitate mounting and dismounting when the pipe coupling is mounted; the joint body 10 further includes a first mating surface 13 provided at the other end thereof and a fastening thread 14 provided between the first mating surface 13 and the fastening portion 12. In one embodiment, as shown in fig. 3, first rubber pad 70 may simply be affixed to side 15 of fastening portion 12. In another embodiment, as shown in fig. 2, in order to replace the first rubber pad 70, the first rubber pad 70 and the fastening portion 12 can be detachably connected, specifically, a convex collar 16 is disposed on the right side of the fastening portion 12, threads are disposed on the periphery of the collar 16, an embedding groove 17 is disposed on the side surface of the collar 16, the first rubber pad 70 is installed in the embedding groove 17, a pressing cover 18 is in threaded connection with the collar 16, and the first rubber pad 70 is pressed in the embedding groove 17 by a pressing plate 19 protruding inwards, so that when the first rubber pad 70 needs to be replaced, the pressing cover 18 can be detached to take out the first rubber pad 70 and replace it, which is very convenient.

As shown in fig. 4, the pipe body 30 includes a pipe portion 31 and a shoulder portion 34 of a ring shape provided at one end of the pipe portion 31 to project outward, and the end is provided with a second mating surface 32 to be mated with the first mating surface 13. The first mating surface 13 and the second mating surface 32 may be vertical planes that mate with each other, or may be tapered surfaces that mate with each other as in the present embodiment. The second rubber pad 71 is fitted to the shoulder 34, and as shown in the drawing, the shoulder 34 is provided with a first fitting portion 35, and the second rubber pad 71 is provided with a second fitting portion 72 fitted to the first fitting portion 35, so that the second rubber pad 71 is detachably connected to the shoulder 34. The second rubber pad 71 is further provided with a pressure receiving portion 73 extending inward to the outer surface of the pipe portion 31. Obviously, the second rubber pad 71 may also be simply attached to the right side of the shoulder 34.

Referring to fig. 5, a tightening nut 50 is fitted over the tubular body 30 and has an inner surface provided with an internal thread 51 for engaging with the fastening thread 14 and an inner ring 52 projecting inward. The inner ring 52 may be provided with a sealing ring (not shown) to enhance sealing with the outer surface of the tube portion 31. The fastening nut 50 preferably has a first annular blade 55 on a left side 54 thereof and a second annular blade 57 on a left side 56 thereof, and the first blade 55 and the second blade 57 are preferably sharp.

As shown in fig. 3 and 6, after the first and

second engagement surfaces

13 and 32 are brought into contact with each other, the screw nut 50 is rotated to move the screw nut 50 toward the coupling body 10, so that the first and

second engagement surfaces

13 and 32 are tightly engaged with each other, the first blade 55 of the screw nut 50 presses and inserts the first rubber gasket 70, and a reliable seal is formed between the screw nut 50 and the first rubber gasket 70, and at the same time, the second blade 57 presses and inserts the second rubber gasket 71, and a reliable seal is formed between the screw nut 50 and the coupling body 30. Thus, even if liquid leaks due to an unexpected gap between the first and

second engagement surfaces

13 and 32 and liquid seeps out from between the engagement surfaces of the female screw 51 and the fastening screw 14 of the fastening nut 50, the liquid cannot seep out from between the first blade 55 and the first rubber pad 70 and between the second blade 57 and the second rubber pad 71, and the sealing performance is further enhanced. It should be understood that, although the figures only show the case where the first blade portion 55 and the second blade portion 57 are both one circle, the first blade portion 55 and the second blade portion 57 may also be multiple circles to achieve better sealing effect.

According to the pipe joint, the first rubber pad is arranged on the joint body, the second rubber pad is arranged on the pipe body, and the first blade part capable of being extruded and inserted into the first rubber pad and the second blade part capable of being extruded and inserted into the second rubber pad are arranged on the screwing nut, so that liquid is difficult to seep out of the pipe joint after leaking from the matching surface of the joint body and the pipe body, and the sealing performance is better.

It should be noted that the above-mentioned preferred embodiments are merely illustrative of the technical concepts and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a pipe joint, locates including the connector body (10), body (30) and cover nut (50) of screwing on body (30), the connector body (10) is provided with first fitting surface (13), body (30) be provided with first fitting surface (13) complex second fitting surface (32), body (30) include pipe portion (31) and set up in shoulder (34) of pipe portion (31) one end, the connector body (10) is including fastening position (12), nut (50) of screwing connect and take-up the connector body (10) and body (30), its characterized in that: the joint body (10) is still including setting up first rubber pad (70) of fastening position (12) side, nut (50) of screwing is provided with annular first cutting part (55) to the side, first cutting part (55) can be squeezed and insert first rubber pad (70), body (30) still including set up in second rubber pad (71) of shoulder (34) side, nut (50) of screwing is still provided with and can be squeezed and insert second cutting part (57) of second rubber pad (71).

2. The pipe coupling according to claim 1, wherein: the first rubber pad (70) is attached to the side surface (15) of the fastening portion (12).

3. The pipe coupling according to claim 1, wherein: the first rubber pad (70) is detachably connected with the fastening part (12).

4. A pipe coupling according to claim 3, wherein: the fastening part (12) further comprises a convex ring (16) and a gland (18) in threaded connection with the convex ring (16), and the gland (18) presses the first rubber gasket (70) on the convex ring (16).

5. The pipe coupling according to claim 4, wherein: the convex ring (16) is provided with an embedding groove (17) for accommodating the first rubber pad (70), the gland (18) is provided with a pressing plate (19) protruding inwards, and the pressing plate (19) presses the first rubber pad (70) in the embedding groove (17).

6. The pipe coupling according to claim 1, wherein: the second rubber pad (71) is detachably connected with the shoulder (34).

7. The pipe coupling according to claim 6, wherein: the shoulder (34) is provided with a first fitting portion (35), and the second rubber pad (71) is provided with a second fitting portion (72) that fits the first fitting portion (35).

8. The pipe coupling according to claim 6, wherein: the tightening nut (50) is provided with an inner ring (52) protruding inward, and the second blade (57) is provided on the side surface of the inner ring (52).

9. The pipe coupling according to claim 1, wherein: the first mating surface (13) and the second mating surface (32) are tapered surfaces.

10. The pipe coupling according to claim 1, wherein: the outer surface of the joint body (10) is provided with a fastening thread (14), and the screwing nut (50) is provided with an internal thread (51) matched with the fastening thread (14).