CN210716488U

CN210716488U - Union joint

Info

Publication number: CN210716488U
Application number: CN201921746779.6U
Authority: CN
Inventors: 徐宝敏; 屠昌兵
Original assignee: Taizhou Jiaheng Valve Co ltd
Current assignee: Taizhou Jiaheng Valve Co ltd
Priority date: 2019-10-17
Filing date: 2019-10-17
Publication date: 2020-06-09
Anticipated expiration: 2029-10-17

Abstract

The utility model relates to a connecting piece field for the pipe is this, discloses a connect by wanting, connect including 90 elbows, union nut and straight tube, union nut one end inner wall is equipped with interior thread A, and 90 elbows include external screw thread end and interior thread end, external screw thread end and female connection, and union nut other end inner wall is equipped with the step form and keeps off the ring, and the straight tube connects to insert and locates in the step form fender intra-annular, is provided with the retaining ring on the straight tube connects, and the straight tube connects the periphery wall still is equipped with the clamping ring, be equipped with the spring between clamping ring and the retaining ring, when screwing up union nut, the step form keeps off the ring and when the straight tube connects and 90 elbows compress tightly, still compresses tightly clamping ring and retaining ring, and the spring between clamping ring and the retaining ring is compressed, can prevent to leak because of union.

Description

Union joint

Technical Field

The utility model relates to a for the connecting piece field, more specifically say, it relates to one kind and connects by wanting.

Background

The union or the movable joint is a common pipeline connecting piece which can be conveniently assembled and disassembled, is used for pipeline connection which is frequently disassembled or overhauled, is convenient to replace, greatly saves the cost of pipeline connection, is also suitable for the joint of 90-degree connection of pipelines by the union, does not need an additional 90-degree elbow, but has poor sealing performance and leakage-proof effect by the union at present.

SUMMERY OF THE UTILITY MODEL

To the deficiency that prior art exists, the utility model aims to provide a by arbitrary joint that has outstanding leak protection effect.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a by connecting, includes that 90 elbows, union nut and straight tube connect, and wherein union nut one end inner wall is equipped with the internal thread, and 90 elbows include external screw thread end and internal thread end, external screw thread end and internal thread connection, its characterized in that: the inner wall of the other end of the joint nut is provided with a step-shaped retaining ring, the straight pipe joint is inserted into the step-shaped retaining ring, the straight pipe joint is provided with a retaining ring, the peripheral wall of the straight pipe joint is further provided with a pressing ring, and a spring is arranged between the pressing ring and the retaining ring.

Through adopting above-mentioned technical scheme, internal thread on the coupling nut and the external screw thread end on the 90 elbow cooperate, when coupling nut screws up, coupling nut keeps off the ring through the step form of inner wall and compresses tightly straight tube joint and 90 elbows together, and simultaneously, the step form keeps off the ring and still compresses tightly the clamping ring and the retaining ring that the straight tube connected the last suit, the spring between clamping ring and the retaining ring is compressed, under the spring action of spring, make the more tight of pressing between straight tube joint and the 90 elbows, can also prevent to cause leaking because of coupling nut is not hard up by arbitrary joint, and 90 elbows can carry out threaded connection through interior thread end and pipeline.

The utility model discloses further set up to: the end face of the outer thread end of the 90-degree elbow is provided with an annular connecting groove, the straight pipe joint is arranged in the annular connecting groove, a circle of sealing groove is arranged on the contact surface of the inner wall of the annular connecting groove and the straight pipe joint, and a sealing ring is arranged in the sealing groove.

Through adopting above-mentioned technical scheme, the inner wall terminal surface of straight tube joint and annular spread groove forms sealedly, and the sealing washer in the seal groove has strengthened the sealed effect and the leak protection performance between straight tube joint and the 90 elbows.

The utility model discloses further set up to: the retaining ring periphery wall is equipped with the sealing ring, and the sealing ring contacts with annular spread groove inner wall.

By adopting the technical scheme, the sealing ring sleeved on the periphery of the retainer ring can prevent the leakage of the joint caused by failure of the sealing ring, the sealing ring and the sealing ring play a role in double insurance, and the sealing effect and the leakage-proof performance between the straight pipe joint and the 90-degree elbow are further enhanced.

The utility model discloses further set up to: the stepped retaining ring comprises a first retaining ring and a second retaining ring, the joint nut is screwed, the first retaining ring of the stepped retaining ring axially compresses the compression ring, and the second retaining ring of the stepped retaining ring compresses the axially-tight sealing ring.

Through adopting above-mentioned technical scheme, the step keeps off the ring and makes the sealed effect and the leak protection performance between straight tube joint and the 90 elbows better.

The utility model discloses further set up to: and one end of the straight pipe joint is provided with an external thread.

Through adopting above-mentioned technical scheme, the straight tube connects and can carries out threaded connection through external screw thread and pipeline.

The utility model discloses further set up to: the 90-degree elbow, the straight pipe joint and the joint nut are made of brass.

Through adopting above-mentioned technical scheme, 90 elbows, straight tube joint and the union nut of brass material possess stronger wear resistance, and intensity is big, can effectual extension by the life who connects.

The utility model discloses further set up to: the surfaces of the 90-degree elbow, the straight pipe joint and the joint nut are subjected to nickel plating treatment.

By adopting the technical scheme, the nickel plating treatment can ensure that the surfaces of the 90-degree elbow, the straight pipe joint and the joint nut have good corrosion resistance, and the service life of the union joint is prolonged.

Drawings

Fig. 1 is a schematic structural view of the joint nut of the present invention before being tightened;

fig. 2 is a schematic structural view of the joint nut of the present invention after being tightened;

FIG. 3 is an enlarged schematic view at A in FIG. 1;

wherein: the sealing structure comprises a 1-90-degree elbow, 11-external thread end, 12-annular connecting groove, 13-sealing groove, 14-internal thread end, 2-straight pipe joint, 21-retaining ring, 22-pressing ring, 23-spring, 24-external thread, 3-joint nut, 31-internal thread, 32-first retaining ring, 33-second retaining ring, 4-sealing ring and 5-sealing ring.

Detailed Description

The invention will be further described in the following with reference to specific embodiments thereof, with reference to the accompanying drawings, in which figures 1-2:

the utility model provides a by connecting, includes 90 elbows 1, union nut 3 and straight tube joint 2, and wherein 3 one end inner walls of union nut are equipped with internal thread 31, and 90 elbows 1 include external screw thread end 11 and internal thread end 14, and external screw thread end 11 is connected with

internal thread

31, 3 other end inner walls of union nut are equipped with the step and keep off the ring, and the step keeps off the ring and includes that first step keeps off ring 32 and second step and keeps off ring 33, and straight tube joint 2 inserts and locates in the step and keep off the ring, and internal thread 31 on the union nut 3 cooperatees with the external screw thread end 11 on 90 elbows 1, and when union nut 3 screwed up, union nut 3 keeps off the ring through the step of inner wall and connects straight tube joint 2 and 90.

The straight pipe joint is provided with retaining ring 21 on 2, and retaining ring 21 below is provided with the clamping ring 22 of suit on straight pipe joint 2, still be equipped with the spring 23 of suit on straight pipe joint 2 between clamping ring 22 and the retaining ring 21, when coupling nut 3 screws up, the first order of step fender ring 32 of step fender ring compresses tightly the clamping ring 22 of suit on the straight pipe joint 2 with retaining ring 21 axial, and the spring 23 between clamping ring 22 and the retaining ring 21 is compressed, under the spring action of spring 23, makes the more tight of pressing between straight pipe joint 2 and the 90 elbow 1, can also prevent to cause the leakage because of coupling nut is not hard up by arbitrary joint.

The terminal surface of the external thread end 11 of 90 elbow 1 is equipped with annular spread groove 12, and in straight pipe joint 2 located annular spread groove 12, form sealed face between the up end of straight pipe joint 2 and the inner wall top end face of annular spread groove 12, be equipped with round seal groove 13 on the inner wall top end face of annular spread groove 12, be provided with sealing washer 4 in the seal groove 13, sealing washer 4 contacts with the up end of straight pipe joint 2, and sealing washer 4 in the seal groove 13 has strengthened the sealed effect and the leak protection performance between straight pipe joint 2 and 90 elbow 1.

The straight tube connects 2 and is equipped with the suit at the peripheral sealing ring 5 of the retaining ring 21 of straight tube joint 2 between the 12 inner walls of annular spread groove, and when the union nut 3 was screwed up, the second step of step form kept off the ring keeps off the ring 33 axial and compresses tightly sealing ring 5, makes sealing ring 5 can prevent to cause the joint to leak after sealing washer 4 became invalid, and sealing ring 5 and sealing washer 4 have played the dual fail-safe, have further strengthened the sealed effect and the leak protection performance between straight tube joint 2 and 90 elbow 1.

The other end of the straight pipe joint 2 is provided with an external thread 24, so that the other end of the straight pipe joint 2 can be connected with a pipeline through the external thread 24, and the internal thread end 14 of the 90-degree elbow 1 can enable the 90-degree elbow 1 to be in threaded connection with the pipeline.

90 elbow 1, straight tube joint 2 and joint nut 3 all are the brass material, and 90 elbow 1, straight tube joint 2 and joint nut 3 of brass material possess stronger wear resistance, and intensity is big, can effectual extension by the life who connects wanting, and 90 elbow 1, straight tube joint 2 and joint nut 3's surface still passes through nickel plating, makes 90 elbow 1, straight tube joint 2 and joint nut 3's surface possess good corrosion resistance, the extension is by the life who connects wantonly more.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a by connecting, includes 90 elbows (1), union nut (3) and straight tube joint (2), wherein union nut (3) one end inner wall is equipped with internal thread (31), and 90 elbows (1) include external screw thread end (11) and internal thread end (14), and external screw thread end (11) are connected its characterized in that with internal thread (31): the inner wall of the other end of the joint nut (3) is provided with a step-shaped retaining ring, the straight pipe joint (2) is inserted into the step-shaped retaining ring, the straight pipe joint (2) is provided with a retaining ring (21), the peripheral wall of the straight pipe joint (2) is further provided with a pressing ring (22), and a spring (23) is arranged between the pressing ring (22) and the retaining ring (21).

2. The union of claim 1, wherein: the outer thread end (11) terminal surface of 90 elbow (1) is equipped with annular spread groove (12), straight tube joint (2) are located in annular spread groove (12), be equipped with round seal groove (13) on annular spread groove (12) inner wall and the contact surface of straight tube joint (2), be provided with sealing washer (4) in seal groove (13).

3. The union of claim 2, wherein: the retaining ring (21) periphery wall is equipped with sealing ring (5), and sealing ring (5) contact with annular spread groove (12) inner wall.

4. A union as claimed in claim 3, wherein: the step-shaped retaining ring comprises a first step retaining ring (32) and a second step retaining ring (33), when the joint nut (3) is screwed, the first step retaining ring (32) of the step-shaped retaining ring axially compresses the pressing ring (22), and the second step retaining ring (33) of the step-shaped retaining ring axially compresses the sealing ring (5).

5. The union of claim 4, wherein: and one end of the straight pipe joint (2) is provided with an external thread (24).

6. The union of claim 5, wherein: the 90-degree elbow (1), the straight pipe joint (2) and the joint nut (3) are made of brass.

7. The union of claim 6, wherein: the surfaces of the 90-degree elbow (1), the straight pipe joint (2) and the joint nut (3) are subjected to nickel plating treatment.