CN217634353U

CN217634353U - Bellows sealing joint

Info

Publication number: CN217634353U
Application number: CN202220594743.6U
Authority: CN
Inventors: 李豹; 王阳; 黄红英; 任宁
Original assignee: NINGBO SHISHAN PIPES CO Ltd
Current assignee: NINGBO SHISHAN PIPES CO Ltd
Priority date: 2022-03-18
Filing date: 2022-03-18
Publication date: 2022-10-21
Anticipated expiration: 2032-03-18

Abstract

The utility model relates to a bellows seal connects, including transition coupling nut and coating lock nut that the screw thread connects in proper order soon, be provided with inner tube sealing washer and outer tube sealing washer in the transition coupling nut respectively with in the coating lock nut, inner tube sealing washer's inner edge shaping has C type annular, the shaping has first step portion on transition coupling nut's the inner wall, outer tube sealing washer's one end outer fringe department shaping second step portion, the shaping has third step portion on outer tube sealing washer's the inner wall, the one end that outer tube sealing washer kept away from inner tube sealing washer is equipped with first inclined plane, and this seal structure compares in traditional bellows seal structure, simplifies nut quantity by three two, screws up the in-process each other through two nuts, seals bellows and coating respectively through inner tube sealing washer and outer tube sealing washer to the double sealing effect of inside and outside pipe has still been guaranteed when having optimized the cost.

Description

Bellows sealing joint

Technical Field

The utility model relates to a bellows joint field specifically is a bellows sealing joint.

Background

In the production and manufacture of the stainless steel corrugated pipe, the installation of the joint body is the most critical, and the installation form of the joint body directly influences the sealing performance of the stainless steel corrugated pipe in the use state. When the connector body is connected with the corrugated pipe inner pipe in the prior art, in order to ensure the tightness of the connection between the connector body and the corrugated pipe inner pipe, the corrugated pipe inner pipe is generally required to be subjected to wave shock in advance. The specific operation means is as follows: when the corrugated pipe inner pipe is connected with the joint body, the rubber coating layer positioned in the end part area of the corrugated pipe is firstly stripped, then the end part of the corrugated pipe inner pipe is flattened (namely, the corrugated pipe operation is performed), and finally the flattened corrugated pipe inner pipe is inserted into the pipe joint, so that the end surface sealing is formed between the corrugated pipe inner pipe and the pipe joint. The installation mode requiring the wave-flushing operation not only leads to complex operation and complex installation process, but also the used corrugated pipe structure is generally formed by sequentially screwing the three nut ends, thereby invisibly increasing the cost.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a sealing joint for corrugated pipes.

For solving the prior art problem, the utility model discloses a technical scheme be:

the utility model provides a bellows sealing joint, includes transition coupling nut and coating layer lock nut that the screw thread connects soon in proper order, be provided with inner tube sealing washer and outer tube sealing washer in the transition coupling nut respectively with in the coating layer lock nut, inner tube sealing washer's one end cup joints in the tip of bellows and inserts transition coupling nut along with the bellows together, outer tube sealing washer cup joints outside the coating layer and its one end stretches into the transition coupling nut in and supports tightly with inner tube sealing washer, inner tube sealing washer's inner edge shaping has the C type annular that is used for holding tightly the bellows crest, the shaping has the first step portion that is used for supplying inner tube sealing washer to tightly on transition coupling nut's the inner wall, outer tube sealing washer's one end outer fringe shaping has the second step portion that is used for supporting tightly transition coupling nut tip, the shaping has the third step portion that is used for supporting tightly the coating layer tip on outer tube sealing washer's the inner wall, the one end that outer tube sealing washer kept away from inner tube sealing washer is equipped with the first inclined plane that is used for reinforcing radial holding tightly power.

Preferably, the outer wall of one end of the transitional connection nut is provided with an external thread, and the inner wall of the coating layer locking nut is provided with an internal thread.

Preferably, an annular flange is formed on the inner edge of one end, far away from the transition connection nut, of the coated layer locking nut, and a second inclined surface used for being tightly attached to the first inclined surface is arranged on one side, close to the outer pipe sealing ring, of the annular flange.

Preferably, the inner edges of the two axial ends of the inner pipe sealing ring are respectively embedded into the wave troughs on the two sides of the wave crest embraced by the adjacent C-shaped ring groove.

Compared with the prior art, the utility model beneficial effect who has is: compared with the traditional corrugated pipe sealing structure, the sealing structure simplifies the number of the nuts into two by three, and seals the corrugated pipe and the coating layer respectively through the inner pipe sealing ring and the outer pipe sealing ring in the process of screwing the two nuts mutually, so that the cost is optimized, and the double sealing effect of the inner pipe and the outer pipe is still ensured.

Drawings

Fig. 1 is a schematic plan view of the embodiment.

The reference numbers in the figures are:

1-a corrugated tube; 2-a coating layer; 3-transition connecting nuts; 4-coated lock nuts; 5-inner pipe sealing ring; 6-outer tube sealing ring; 7-C type ring groove; 8-a first step; 9-a second step; 10-a third step; 11-a first bevel; 12-an annular flange; 13-second slope.

Detailed Description

For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

As shown in fig. 1, a bellows sealing joint, including transition coupling nut 3 and coating layer lock nut 4 that the screw thread connects soon in proper order, be provided with inner tube sealing washer 5 and outer tube sealing washer 6 in transition coupling nut 3 and the coating layer lock nut 4 respectively, the one end of inner tube sealing washer 5 cup joints in the tip of bellows 1 and insert transition coupling nut 3 along with bellows 1 together, outer tube sealing washer 6 cup joints outside coating layer 2 and its one end stretches into in transition coupling nut 3 and supports tightly with inner tube sealing washer 5, the inner edge shaping of inner tube sealing washer 5 has the C type annular 7 that is used for holding tightly 1 crest of bellows, the shaping has the first step portion 8 that is used for supplying inner tube sealing washer 5 to tightly on the inner wall of transition coupling nut 3, the shaping of the one end outer fringe of outer tube sealing washer 6 has the second step portion 9 that is used for supporting tightly transition coupling nut 3 tip, the shaping has the third step portion 10 that is used for supporting tightly 2 tip of bellows on the inner tube sealing washer 6's the inner wall, the one end that coating layer sealing washer 6 kept away from inner tube sealing washer 5 is equipped with the first inclined plane 11 that is used for strengthening radially and holds tightly the power. Before assembling, the corrugated pipe 1 with the end part removed with the coating layer 2 is sequentially sleeved with the coating layer locking nut 4, the outer pipe sealing ring 6 and the inner pipe sealing ring 5, then the end part of the corrugated pipe 1 is inserted into the transition connecting nut 3, then the coating layer locking nut 4 is screwed with the transition connecting nut 3, in the process, the coating layer locking nut 4 gradually abuts against the first inclined surface 11 of the outer pipe sealing ring 6, so that the front end of the outer pipe sealing ring 6 is driven to abut against the end surface of the inner pipe sealing ring 5 along the axial direction, along with the screwing of the threads, the outer pipe sealing ring 6 is provided with one end of the first inclined surface 11 and firmly abuts against the coating layer 2 along the corrugated pipe 1 so as to realize a sealing effect, meanwhile, the other end of the outer pipe sealing ring 6 abuts against one end of the inner pipe sealing ring 5, further, the end part of the transition connecting nut 3 is firmly abutted against through the third step part 10 so as to realize sealing, meanwhile, the inner pipe sealing ring 5 is pressed and can also abut against the first step part 8 of the transition connecting nut 3 so as to realize sealing firmly, the sealing, the C-shaped ring groove 7 is used for firmly holding the outer wall of the sealing ring 5 tightly, and the stability of the inner pipe can not be separated from the inner pipe sealing ring 5.

The one end outer wall of transition coupling nut 3 is equipped with the external screw thread, is equipped with the internal thread on coating layer lock nut 4's the inner wall, and coating layer lock nut 4 realizes being connected through the external screw thread cooperation of internal thread with transition coupling nut 3 to extrude inner tube sealing washer 5 and outer tube sealing washer 6 at the in-process of screwing and realize sealed effect.

An annular flange 12 is formed on the inner edge of one end, far away from the transitional connecting nut 3, of the coated layer locking nut 4, and a second inclined surface 13 used for being tightly attached to the first inclined surface 11 is arranged on one side, close to the outer pipe sealing ring 6, of the annular flange 12. In the process of screwing the coating locking nut 4 and the transitional connection nut 3, the second inclined surface 13 on the annular flange 12 applies pressure to the first inclined surface 11 on the outer pipe sealing ring 6 to extrude acting force, the axial force part of the acting force is used for pushing the outer pipe sealing ring 6 to move forwards along the axial direction of the corrugated pipe 1, and the radial force part of the acting force is used for enabling the outer pipe sealing ring 6 to more tightly surround the coating 2, so that the sealing effect is further realized.

The inner edges of two axial ends of the inner pipe sealing ring 5 are respectively embedded into wave troughs on two sides of a wave crest embraced by the adjacent C-shaped ring groove 7. The crest department that the inner tube sealing washer 5 blocked bellows 1 through C type ring groove 7 for at the in-process that coating layer lock nut 4 screwed, drive bellows 1 together antedisplacement, after inner tube sealing washer 5 was firmly compressed tightly and is realized sealing on first step portion 8, the bellows 1 of hugging closely that can be firm by extruded C type ring groove 7, thereby avoid bellows 1 to separate from inner tube sealing washer 5.

The above embodiments only represent one or several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a bellows sealing joint, includes transition coupling nut (3) and coating layer lock nut (4) that the screw thread connects soon in proper order, be provided with inner tube sealing washer (5) and outer tube sealing washer (6) in transition coupling nut (3) and coating layer lock nut (4) respectively, the one end of inner tube sealing washer (5) is cup jointed in the tip of bellows (1) and is together inserted transition coupling nut (3) along with bellows (1), outer tube sealing washer (6) cup joint outside coating (2) and its one end stretches into transition coupling nut (3) in and supports tightly with inner tube sealing washer (5), its characterized in that, the inner edge shaping of inner tube sealing washer (5) has C type ring groove (7) that are used for hugging tightly bellows (1) crest, the shaping has first step portion (8) that are used for supplying inner tube sealing washer (5) to tightly on the inner wall of transition coupling nut (3), the shaping of outer tube sealing washer (6)'s one end periphery department shaping has second step portion (9) that are used for hugging tightly transition coupling nut (3) tip, the shaping of outer tube sealing washer (6) has the radial enhancement step portion (10) that is used for hugging tightly first step portion (2) of coating layer reinforcing inclined plane (5) and is equipped with the inner tube sealing washer (11) on the inner wall.

2. A bellows seal joint according to claim 1, characterized in that the transition joint nut (3) is provided with an external thread on the outer wall at one end and the coated lock nut (4) is provided with an internal thread on the inner wall.

3. A bellows seal joint according to claim 1, wherein the inner edge of the coated lock nut (4) at the end remote from the transition joint nut (3) is formed with an annular flange (12), and the side of the annular flange (12) near the outer tube sealing ring (6) is provided with a second inclined surface (13) for abutting against the first inclined surface (11).

4. A bellows seal joint according to claim 1, wherein the inner peripheral edges of the inner tube sealing ring (5) at both ends in the axial direction thereof are respectively fitted into the valleys at both sides of the peak held by the adjacent C-shaped ring groove (7).