CN209991033U

CN209991033U - Pipe joint

Info

Publication number: CN209991033U
Application number: CN201920474777.XU
Authority: CN
Inventors: 邱梅
Original assignee: Suzhou Danton Mechanical And Electrical Co Ltd
Current assignee: Suzhou Danton Mechanical And Electrical Co Ltd
Priority date: 2018-09-28
Filing date: 2019-04-10
Publication date: 2020-01-24
Anticipated expiration: 2029-04-10

Abstract

The utility model discloses a pipe joint, locate the second nut of screwing on the body including connecting the body, body and cover, connect the body to be provided with first fitting surface, the body be provided with first fitting surface complex second fitting surface, its characterized in that: the joint body is provided with first shoulder, the body is provided with the second shoulder, the coupling still includes the first lock nut with second lock nut threaded connection, first nut of screwing is provided with first inner ring, the second nut of screwing is provided with the second inner ring, the coupling still includes the first elastic component that sets up between first shoulder and first inner ring, the second elastic component of setting between second shoulder and second inner ring, connect first fastener and the second fastener of connection between the second nut of screwing and the joint body between the first nut of screwing and the body. The utility model discloses a set up the fastener and make the difficult emergence pine of nut of screwing take off.

Description

Pipe joint

Technical Field

The utility model 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 tightening nut 100, wherein the tightening nut 100 causes the joint body 10 and the pipe body 30 to abut against each other, thereby completing the connection between the joint body 10 and the pipe body 30, but after a period of use or vibration occurs, the tightening nut 100 is easily loosened, which results in leakage due to poor sealing.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a coupling to the above-mentioned defect among the prior art, its nut is difficult for the pine to take off.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme: the utility model provides a pipe joint, locates including the joint body, body and cover second 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 joint body is provided with first shaft shoulder, the body includes pipe portion and sets up the second shaft shoulder of evagination on pipe portion, the pipe joint still include with second lock nut threaded connection's first lock nut, first nut of screwing be provided with the first inner ring that connects body outer peripheral face cooperation seal, the second nut of screwing be provided with the second inner ring that pipe portion outer peripheral face cooperation seal, the pipe joint is still including setting up first shaft shoulder with first elastic component between the first inner ring, setting are in the second shaft shoulder with second elastic component between the second inner ring, connection first nut of screwing with first fastener between the joint body and connection the second screw nut A second fastener between the female and the tubular body.

Furthermore, the utility model discloses still provide following subsidiary technical scheme:

a first clearance is formed between the first shaft shoulder and a first inner surface of the first tightening nut, a first cavity communicated with the first clearance is formed between the first shaft shoulder and the first inner ring,

a second gap is formed between the first shoulder and a second inner surface of the second tightening nut, and a second cavity communicated with the second gap is formed between the second shoulder and the second inner ring.

The first shaft shoulder is provided with a plurality of first mounting holes, and the first elastic piece is mounted in the first mounting holes.

The first mounting holes are uniformly distributed on the first shaft shoulder by taking the joint body axis as the center.

An annular first sliding groove is formed in the side face of the first inner ring, and the first elastic piece is installed in the first installation hole and the first sliding groove.

The second shaft shoulder is provided with a plurality of second mounting holes, and the second elastic piece is mounted in the second mounting holes.

The second mounting holes are uniformly distributed on the second shaft shoulder by taking the axis of the pipe body as a center.

An annular second sliding groove is formed in the side face of the second inner ring, and the second elastic piece is installed in the second installation hole and the second sliding groove.

The first inner ring is provided with a first sealing ring which is matched and sealed with the first outer surface of the joint body, and the second inner ring is provided with a second sealing ring which is matched and sealed with the pipe part.

Compared with the prior art, the utility model has the advantages of:

1. by arranging the elastic piece between the screwing nut and the pipe body, the restoring force of the elastic piece can strengthen the contact fit between the pipe body and the joint body, and the pipe joint has strong vibration resistance and better sealing property;

2. the fastening piece is arranged, so that the screwed nut is not easy to loosen;

3. when leakage occurs, the joint body and the pipe body can abut against each other by means of the pressure of the leaked liquid, and leakage is reduced or eliminated.

Drawings

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

Fig. 2 is a schematic structural diagram of the middle pipe joint of the present invention.

Fig. 3 is a left side view of the middle joint body of the present invention.

Fig. 4 is a right side view of the tube body of the present invention.

Detailed Description

The following non-limiting detailed description of the present invention is provided in connection with the preferred embodiments and accompanying drawings.

As shown in fig. 2 to 4, a pipe joint according to a preferred embodiment of the present invention includes a joint body 10, a pipe body 30, a first nut 50, a first elastic member 70, a second elastic member 71, and a second nut 90.

The joint body 10 includes a pipe thread 11 provided at one end for connection with a metal pipe (not shown), a first mating surface 13 provided at the other end, and a first shoulder 12 provided between the pipe thread 11 and the first mating surface 13. A first clearance 61 is formed between the outer peripheral surface of the first shoulder 12 and the first inner surface 57 of the first fastening nut 50.

The tube 30 includes a tube portion 31 and a second annular outwardly protruding shoulder 34 disposed at one end of the tube portion 31, and the end is further provided with a second engagement surface 32 that engages with the first engagement 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 clearance 62 is formed between the outer peripheral surface of the second shoulder 34 and the second inner surface 94 of the second turnup nut 90.

The first screwing nut 50 is fitted over the coupling body 10 and includes a first inner ring 51 which is provided at one end thereof in an annular shape and projects inward, and a first screw-coupling portion 16 which is screw-coupled to the second screwing nut 90. The first inner ring 51 is fitted and sealed with the first outer surface 17 of the joint body 10, which may be formed by ensuring the fitting accuracy of the first inner ring 51 with the first outer surface 17 through high-precision machining, or may be sealed by providing a first sealing ring 55 between the first inner ring 51 and the first outer surface 17, or a combination of the two. A first cavity 59 is formed between the first inner ring 51 and the first shoulder 12, which communicates with the first gap 61.

The second screwing nut 90 is disposed on the tube 30 and includes a second inner ring 91 disposed at one end and protruding inward, and a second screw portion 92 in threaded engagement with the first screw portion 16. One of the first screw portion 16 and the second screw portion 92 is provided with an internal thread, and the other is provided with an external thread, and the first screw portion and the second screw portion are connected by the internal thread and the external thread in a matching manner. The second inner ring 91 is fitted and sealed with the outer surface of the pipe portion 31, which may be in the form of ensuring the fitting accuracy of the second inner ring 91 with the pipe portion 31 by high-precision machining, or may be sealed by providing a second seal ring 95 between the second inner ring 91 and the outer surface of the pipe portion 31, or a combination of both. The second inner ring 91 and the second shoulder 34 define a second cavity 60 therebetween that communicates with the second gap 62.

The first elastic element 70 is arranged between the first tightening nut 50 and the joint body 10, in particular between the first shoulder 12 and the first inner ring 51. A plurality of first mounting holes 14 are formed in the left side surface of the first shoulder 12, and the plurality of first mounting holes 14 are uniformly distributed around the axis of the joint body 10 to obtain uniform stress. An annular first sliding groove 56 is provided on the right side surface of the first inner ring 51, the first sliding groove 56 corresponds to the plurality of first mounting holes 14, and the first elastic member 70 is mounted between the first mounting holes 14 and the first sliding groove 56.

The second elastic element 71 is arranged between the second tightening nut 90 and the tubular body 30, in particular between the second shoulder 34 and the second inner ring 91. A plurality of second mounting holes 37 are provided on the right side surface of the second shoulder 34, and the plurality of second mounting holes 37 are preferably uniformly distributed around the axis of the pipe body 30 to obtain uniform force. An annular second sliding groove 93 is formed in the left side surface of the second inner ring 91, the second sliding groove 93 corresponds to the plurality of second mounting holes 37, and the second elastic member 71 is mounted between the second mounting holes 37 and the second sliding groove 93. The first and second

elastic members

70 and 71 may be conventional springs.

After the first and

second mating surfaces

13, 32 contact each other, the first fastening nut 50 (or the second fastening nut 90) is screwed to make the first and

second fastening nuts

50, 90 approach each other, and the first inner ring 51 and the second inner ring 91 respectively press the first elastic member 70 and the second elastic member 71 to deform, so that a pressing force is generated between the first and

second mating surfaces

13, 32 to seal. After the installation is completed, under the action of the elastic restoring force, the first elastic member 70 continuously applies force to the first shoulder 12 and the first inner ring 51; the second elastic piece 71 continuously applies force to the second shoulder 34 and the second inner ring 91, so that the first and second matching

surfaces

13 and 32 continuously keep extrusion force, and the sealing is more reliable; meanwhile, the threaded engagement positions of the first screwing nut 50 and the second screwing nut 90 are continuously stressed, so that the friction force between the first screwing nut and the second screwing nut is increased, the first screwing nut and the second screwing nut are not easy to loosen, and the vibration and looseness preventing capability is stronger.

In order to further prevent the first and

second fastening nuts

50, 90 from loosening, a first protruding ring 75 extending outward is further disposed on the first inner ring 51 of the first fastening nut 50, and the first protruding ring 75 is provided with a first through hole 61. The first through hole 61 is provided with a first fastening member 76 connected to the coupling body 10, and the position of the first protruding ring 60 on the coupling body 10 is fixed by the first fastening member 76. Similarly, a second collar 77 extending outward is disposed on a second inner ring 91 of the second fastening nut, a second through hole 78 is disposed on the second collar 77, a second fastening member 79 connected to the pipe portion 31 is disposed in the second through hole 78, and the position of the second collar 77 on the pipe portion 31 is fixed by the second fastening member 79. The first and second fastening

members

76, 79 may be pins, in which case the pipe portion 31 and the joint body 10 are respectively provided with a first pin hole 80 and a second pin hole 81 that are engaged with the pins, or the first and second fastening

members

76, 79 may be screws, in which case the pipe portion 31 and the joint body 10 are respectively provided with threaded holes that are engaged with the threaded holes.

Another advantage of the present invention is that, after the first and

second engagement surfaces

13, 32 generate the clearance and leak, the liquid will flow into the first cavity 59 and the second cavity 60 from the first clearance 61 and the second clearance 62, respectively, the hydraulic pressure in the first cavity 59 will act on the left side 36 of the first shoulder 12 to generate the pushing force F1 pushing the joint body 10 to the right against the joint body 30, which can counteract the hydraulic force F partially separating the first and

second engagement surfaces

13, 32, and similarly, the hydraulic pressure in the second cavity 60 will act on the right side of the second shoulder 34 to generate the pushing force F2 pushing the joint body 30 to the left against the joint body 10, which can also counteract the hydraulic force partially separating the first and

second engagement surfaces

13, 32, when the pushing force F1 combines the spring force or the pushing force F2 combines the spring force, the first and

second engagement surfaces

13, 32, and when the resultant force of the first and second engagement surfaces 13 combines the spring force or F2 combines the spring force is greater, 32 will again contact the seal. Therefore, the pipe joint can ensure that the first matching surface 13 and the second matching surface 32 can be reliably abutted only by smaller spring force, and even leakage occurs, the leakage is not serious.

The utility model discloses a coupling possesses following advantage at least:

It should be noted that the above-mentioned preferred embodiments are only for illustrating the technical concepts and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention accordingly, and the protection scope of the present invention cannot be limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a pipe joint, locates including connecting body (10), body (30) and cover second nut (90) of screwing on body (30), it is provided with first fitting surface (13) to connect body (10), body (30) be provided with first fitting surface (13) complex second fitting surface (32), its characterized in that: the joint body (10) is provided with a first shaft shoulder (12), the body (30) includes pipe portion (31) and sets up second shaft shoulder (34) evagination on pipe portion (31), the pipe joint still include with second nut (90) threaded connection's first nut (50) of screwing, first nut (50) of screwing be provided with joint body (10) outer peripheral face cooperation sealed first inner ring (51), second nut (90) of screwing be provided with pipe portion (31) outer peripheral face cooperation sealed second inner ring (91), the pipe joint is still including setting up first shaft shoulder (12) with first elastic component (70) between first inner ring (51), setting are in second shaft shoulder (34) with second elastic component (71) of screwing between second inner ring (91), connect first fastener (76) between first shaft shoulder (50) and joint body (10) and connect in second screw A second fastener (79) between the female member (90) and the tubular body (30).

2. The pipe coupling according to claim 1, wherein: a first clearance (61) is formed between the first shoulder (12) and a first inner surface (57) of the first tightening nut (50), and a first cavity (59) communicating with the first clearance (61) is formed between the first shoulder (12) and the first inner ring (51).

3. The pipe coupling according to claim 1, wherein: a second clearance (62) is formed between the first shoulder (12) and a second inner surface (94) of the second tightening nut (90), and a second cavity (60) communicating with the second clearance (62) is formed between the second shoulder (34) and the second inner ring (91).

4. The pipe coupling according to claim 1, wherein: the first shaft shoulder (12) is provided with a plurality of first mounting holes (14), and the first elastic piece (70) is mounted in the first mounting holes (14).

5. The pipe coupling according to claim 4, wherein: the first mounting holes (14) are uniformly distributed on the first shaft shoulder (12) by taking the axis of the joint body (10) as a center.

6. A pipe coupling according to claim 4 or 5, wherein: an annular first sliding groove (56) is formed in the side face of the first inner ring (51), and the first elastic piece (70) is installed in the first installation hole (14) and the first sliding groove (56).

7. The pipe coupling according to claim 1, wherein: the second shaft shoulder (34) is provided with a plurality of second mounting holes (37), and the second elastic piece (71) is mounted in the second mounting holes (37).

8. The pipe coupling according to claim 7, wherein: the second mounting holes (37) are uniformly distributed on the second shaft shoulder (34) by taking the axis of the pipe body (30) as a center.

9. A pipe-fitting according to claim 7 or 8, wherein: an annular second sliding groove (93) is formed in the side face of the second inner ring (91), and the second elastic piece (71) is installed in the second installation hole (37) and the second sliding groove (93).

10. The pipe coupling according to claim 1, wherein: the first inner ring (51) is provided with a first sealing ring (55) which is matched and sealed with the first outer surface (17) of the joint body (10), and the second inner ring (91) is provided with a second sealing ring (95) which is matched and sealed with the pipe part (31).