Inner inflation back protection sealing device for pipe welding
By designing a pipe welding inner inflatable back protection sealing device including a deformable flexible expansion plug sleeve and a shaft sleeve, the problems of inconvenient operation and poor sealing in the prior art are solved, gas saving and welding quality are improved, and Working environment.
Patent Information
- Application Number
- CN202420770618.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-15
AI Technical Summary
The internal inflation protection device during welding of existing pipes is inconvenient to operate, poor adaptability and poor sealing, resulting in gas waste and working environment pollution, making it difficult to ensure the quality of the weld.
A pipe welded inflatable back protective sealing device including deformable flexible expansion plug sleeve, sleeve and shaft sleeve is designed to achieve sealing through a conical surface and step hole structure, combining compression springs and lock nuts to ensure smooth gases to the welding. The joint position and reduce damage to the tube through wear-resistant material.
It realizes internal inflation protection with convenient operation, good adaptability and good sealing, saves gas, ensures welding quality, and improves the working environment, avoids insufficient gas and the generation of broken fine matter.
Smart Images
Figure CN222255508U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an internal inflation protection sealing device for pipe welding. Background Art
[0002] When welding and extending pressure pipes, the welds need to be inflated for protection to ensure the quality of the welds. At present, when inflating the welds for protection, a long iron pipe is often used to wrap soft objects such as cotton yarn in front of it for fixed sealing. This is not only inconvenient to operate and has poor adaptability, but also has poor sealing performance, long pre-inflation time and waste of gas. At the same time, a lot of cotton yarn and other fine particles are generated, which affects the working environment and is extremely incompatible with the 5S work site requirements. Summary of the invention
[0003] The purpose of the utility model is to provide a pipe welding internal inflation back protection sealing device in view of the above-mentioned deficiencies in the prior art, which is not only easy to operate and has good adaptability, but also has good sealing performance, can save gas, ensure welding quality, and improve the working environment.
[0004] In order to achieve the above-mentioned purpose, the utility model provides a pipe welding internal inflation back side protection sealing device, including an expansion sleeve, the outer circle of the expansion sleeve is a conical surface, and a step hole is arranged therein; it is characterized in that: a sleeve is arranged in the step hole through a retaining ring that cooperates with the end face of the step hole, the sleeve is arranged in the sleeve through a retaining ring that cooperates with the front end face of the sleeve, the sleeve and the sleeve are matched with clearance in the radial direction, a compression spring is arranged in the step hole in front of the sleeve, the rear section of the adjusting screw plug is arranged in the step hole in front of the compression spring, and the outer circle of the front section of the adjusting screw plug is provided with a locking nut through a thread; the sleeve and the adjusting screw plug are both provided with through holes.
[0005] The expansion sleeve of the utility model is a deformable flexible material, and can be easily inserted into the welding pipe through the conical surface of the outer circle, and can also be used for pipes of different diameters, which is not only convenient to operate and has good adaptability; the shielding gas output hose is connected to the rear end of the sleeve; the shielding gas passes into the pipe through the through hole of the sleeve and the adjusting screw plug, so as to play a protective role; by rotating the locking nut, the adjusting screw plug compresses the compression spring, and the sealing end faces of the sleeve, the sleeve and the expansion sleeve are successively pressed tightly, so that the sealing performance is good, gas can be saved, and the welding quality can be guaranteed; during welding, the expansion sleeve rotates with the welding pipe, and at the same time, under the action of the sleeve, the sleeve remains stationary, so that the shielding gas output hose does not rotate either, so that the shielding gas can smoothly reach the welding seam position, and the situation of insufficient internal inflation caused by reduced inflation volume is avoided, and the working environment is improved;
[0006] As a further improvement of the utility model, a sealing plate is further provided between the shaft sleeve and the compression spring, and the sealing plate is provided with a through hole; this can improve the close contact effect between the shaft sleeve and the sealing end face of the sleeve, and ensure the sealing performance;
[0007] As a further improvement of the utility model, the rear end of the shaft sleeve is provided with a tower joint and is located behind the expansion sleeve; this facilitates the connection between the shaft sleeve and the protective gas output hose;
[0008] As a further improvement of the utility model, the expansion sleeve is made of wear-resistant rubber or polytetrafluoroethylene; it is easy to deform and effectively reduces damage to the mother material of the pipe;
[0009] In summary, the utility model is not only easy to operate and has good adaptability, but also has good sealing performance, can save gas, ensure welding quality, and improve the working environment. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is the front view of the embodiment of the utility model. DETAILED DESCRIPTION
[0011] The utility model is further described below in conjunction with the accompanying drawings.
[0012] like Figure 1 As shown, a pipe welding internal inflation back side protection sealing device of this embodiment comprises an expansion sleeve 1, a sleeve 2 and a shaft sleeve 3. The outer circle of the expansion sleeve 1 is a conical surface with a step hole arranged therein; the sleeve 2 is arranged in the step hole through a retaining ring 2a matched with the end face of the step hole, and the shaft sleeve 3 is arranged in the sleeve 2 through a retaining ring 3a matched with the front end face of the sleeve, and the shaft sleeve 3 and the sleeve 2 are clearance matched in the radial direction, and the rear end of the sleeve 3 is provided with a tower joint 3b to be threaded and is located behind the expansion sleeve 1, and a sealing plate 4 and a compression spring 5 are arranged in the step hole in front of the sleeve 3 in sequence, and the rear section of the adjusting screw plug 6 is arranged in the step hole in front of the compression spring 5, and the outer circle of the front section of the adjusting screw plug 6 is provided with a locking nut 7 through a thread; the shaft sleeve 3, the sealing plate 4 and the adjusting screw plug 6 are all provided with through holes; the expansion sleeve 1 is made of wear-resistant rubber or polytetrafluoroethylene.
[0013] The expansion sleeve 1 of the utility model is a deformable flexible material. The shielding gas output hose is connected to the tower joint 3b of the shaft sleeve 3, and the expansion sleeve 1 is inserted into the pipe to be welded. The conical surface of the expansion sleeve is tightly combined with the inner wall of the pipe. The friction between the pipe and the expansion sleeve is used to make the expansion sleeve 1 rotate with the welding pipe; at the same time, the shaft sleeve 3 and the casing 2 are clearance-matched in the radial direction, and the shaft sleeve remains stationary, so that the shielding gas output hose does not rotate either, and the shielding gas can enter the welding pipe through the through holes to achieve protection. The gas reaches the welding seam smoothly, avoiding the situation of insufficient internal inflation caused by reduced inflation volume, and ensuring the welding quality; the expansion sleeve 1 of the utility model is easy to deform and can be used for pipes of different diameters, which is not only convenient to operate but also has good adaptability; by rotating the locking nut 7, the adjusting screw plug 6 compresses the compression spring, and the sealing end faces of the shaft sleeve 3, the sleeve 2 and the expansion sleeve 1 are sequentially attached through the sealing plate 4, which has good sealing performance, can save gas, avoid the use of cotton yarn, prevent the generation of broken fine objects, and improve the working environment;
[0014] The above embodiments are used for illustration, but it should be understood that the above embodiments are only used for the purpose of example and description, and are not intended to limit the present invention to the scope of the described embodiments.
Claims
1. A pipe welding internal inflation back side protection sealing device, comprising an expansion sleeve, the outer circle of the expansion sleeve is a conical surface, and a stepped hole is arranged therein; characterized in that: A sleeve is arranged in the step hole through a retaining ring which cooperates with the end face of the step hole, a sleeve is arranged in the sleeve through a retaining ring which cooperates with the front end face of the sleeve, the sleeve and the sleeve are matched with clearance in the radial direction, a compression spring is arranged in the step hole in front of the sleeve, the rear section of the adjusting screw plug is arranged in the step hole in front of the compression spring, and a locking nut is arranged on the outer circle of the front section of the adjusting screw plug through a thread; both the sleeve and the adjusting screw plug are provided with through holes.
2. A pipe welding internal inflatable back protection sealing device as claimed in claim 1, characterized in that: A sealing plate is also arranged between the shaft sleeve and the compression spring, and the sealing plate is provided with a through hole.
3. A pipe welding internal inflation back protection sealing device as claimed in claim 1 or 2, characterized in that: The rear end of the shaft sleeve is provided with a tower joint and is located behind the expansion sleeve.
4. A pipe welding internal inflation back side protection sealing device as claimed in claim 3, characterized in that: The expansion sleeve is made of wear-resistant rubber or polytetrafluoroethylene.