Coaxial welding auxiliary device for conical reducer connecting pipe fitting

Abstract

The coaxial welding auxiliary device comprises a coaxial connecting piece which is used for coaxially connecting a large-head pipe fitting and a small-head pipe fitting and driving ports to be welded to abut against each other, and further comprises a supporting frame which is used for supporting the coaxial connecting piece and driving the coaxial connecting piece to axially rotate. According to the auxiliary welding device, coaxial connection of the large-head pipe fitting and the small-head pipe fitting can be achieved through the arranged coaxial connecting piece, so that the problems of axis deviation and axial inclination existing during welding at present are solved, and then the welding strength and sealing performance of the pipe ends of the large-head pipe fitting and the small-head pipe fitting can be guaranteed after welding. And the supporting frame for driving the coaxial connecting piece to axially rotate is arranged, the large-head pipe fitting and the small-head pipe fitting can be driven to circumferentially rotate on the supporting frame after coaxial connection is completed, continuous circumferential welding on the connected ports can be conveniently and rapidly achieved, and the welding operation efficiency is further improved.

Description

Technical Field

[0001] The present application relates to the technical field of coaxial welding of conical reducer pipe fittings, and in particular to a coaxial welding auxiliary device for conical reducer connecting pipe fittings. Background Art

[0002] Conical reducer fittings, also called conical reducers or conical joints, are pipe connection elements used to connect two pipes of different diameters. The design of the conical reducer allows for a smooth transition between two pipes of different diameters, reduces resistance during fluid flow, reduces the formation of eddies and turbulence, and thus improves the efficiency of the fluid system. Conical reducer fittings are widely used in various fluid delivery systems, such as petrochemical, water treatment, pharmaceutical, food processing, energy and other fields. They can be installed on horizontal or vertical pipes to change the direction of the pipe or connect pipes of different diameters to meet the needs of the process.

[0003] Conical reducer pipe fittings are usually welded together by a large-end pipe fitting and a small-end pipe fitting with the same diameter of the single-side port, and the outer ports of the large-end pipe fitting and the small-end pipe fitting are connected to the pipe body of the corresponding diameter through flanges. At present, when the reducer pipe fittings are connected to the pipe bodies of different diameters, the reducer pipe fittings need to be welded together first (as shown in the attached manual). Figure 2 As shown), and then connected to the pipe body.

[0004] At present, when prefabricating and welding the reducer and reducer pipe fittings in the factory, due to the different diameters of the reducer and reducer pipe fittings and the fact that the tapered reducer and reducer pipe fittings cannot be placed stably, it is difficult to align the two coaxially during welding, thus causing the following problems: Figure 3 The axis of the reducer pipe shown is deviated; and the reducer pipe of the tapered structure is unstable when placed, which also causes the axial tilt of the reducer pipe ( Figure 4 The state shown in the figure) will affect the welding strength and sealing of the large and small head pipe fittings, and the working efficiency cannot be effectively improved during continuous welding. Summary of the invention

[0005] In response to the above-mentioned problems, the present application aims to provide a coaxial welding auxiliary device for tapered large and small head connecting pipe fittings, which can realize the coaxial connection of large-head pipe fittings and small-head pipe fittings to solve the current problems of axial deviation and axial inclination during welding, and further ensure the strength and sealing of the welding of the pipe ends of the large-head pipe fittings and the small-head pipe fittings after welding.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted in the present application is as follows: a coaxial welding auxiliary device for tapered large and small head connecting pipe fittings, the tapered large and small head connecting pipe fittings including a large head pipe fitting and a small head pipe fitting with the same single-side port diameter, characterized in that: the welding auxiliary device includes a coaxial connector that coaxially connects the large head pipe fitting and the small head pipe fitting and drives the ports to be welded to abut against each other, and also includes a support frame that supports and drives the coaxial connector to rotate axially.

[0007] Preferably, the coaxial connector comprises a large coaxial body and a small coaxial body which are in separate structures and which sequentially fit the inner walls of the large-head pipe and the small-head pipe, and the large coaxial body and the small coaxial body are detachably coaxially connected.

[0008] Preferably, a connecting screw is provided at the end of the small coaxial body close to the large coaxial body, and a connecting hole is opened at the end of the large coaxial body.

[0009] Preferably, the outer side walls of the large coaxial body and the small coaxial body are both provided with support rods;

[0010] The support frame comprises a base, vertical support rods are arranged on both sides of the base, and a circular arc groove body embedded in the support rod is arranged at the top end of each vertical support rod.

[0011] The beneficial effect of the present application is that the welding auxiliary device can realize the coaxial connection of the large-head pipe fitting and the small-head pipe fitting by means of the coaxial connecting piece, so as to solve the problems of axis deviation and axial inclination currently existing during welding, and furthermore, the strength and sealing of the welding of the pipe ends of the large-head pipe fitting and the small-head pipe fitting can be ensured after welding.

[0012] By setting up a support frame that drives the coaxial connector to rotate axially, after the coaxial connection is completed, the large-head pipe and the small-head pipe can be driven to rotate circumferentially on the support frame, thereby conveniently realizing continuous circumferential welding of the connecting ports, further improving the welding operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a separate structural diagram of the large-head pipe fittings and small-head pipe fittings to be welded.

[0014] Figure 2 This is the welding structure diagram of large-head pipe fittings and small-head pipe fittings.

[0015] Figure 3 This is a diagram showing the axis deviation that currently exists during manual welding.

[0016] Figure 4 This is a diagram showing the axis tilt that occurs during manual welding.

[0017] Figure 5 This is a diagram of the overall structure of the coaxial welding auxiliary device of this application.

[0018] Figure 6 This is a diagram showing the coaxial connection of a large-head pipe fitting and a small-head pipe fitting in this application.

[0019] Figure 7 For this application, Figure 6 The big-head pipe fitting and the small-head pipe fitting after coaxial connection are placed on the support frame for rotation welding.

[0020] Figure 8 For this application Figure 7 After welding is completed, the large coaxial body and the small coaxial body are disassembled as shown in the figure. DETAILED DESCRIPTION

[0021] In order to enable ordinary technicians in the field to better understand the technical solution of the present application, the technical solution of the present application is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Refer to the attached Figures 1 to 8 The coaxial welding auxiliary device of a conical reducer connecting pipe fitting is shown, and the conical reducer connecting pipe fitting comprises a large-end pipe fitting 11 and a small-end pipe fitting 12 with the same pipe diameter of a single-side port, such as Figure 1 The split structure to be welded is shown. In order to solve the current problems of axis deviation and axial tilt during welding, the present application designs a welding auxiliary device, which includes a coaxial connector that coaxially connects the large-head pipe fitting 11 and the small-head pipe fitting 12 and drives the ports to be welded to abut against each other, that is, the coaxial connection of the large-head pipe fitting 11 and the small-head pipe fitting 12 can be achieved through the coaxial connector to solve the current problems of axis deviation and axial tilt during welding, and then the strength and sealing of the pipe end welding of the large-head pipe fitting 11 and the small-head pipe fitting 12 can be guaranteed after welding.

[0023] After the large-head pipe fitting 11 and the small-head pipe fitting 12 are coaxially connected by the coaxial connector, in order to facilitate the continuous circumferential welding operation of the connected pipe ports, the auxiliary device also includes a support frame 3 that supports and drives the coaxial connector to rotate axially. The large-head pipe fitting 11 and the small-head pipe fitting 12 connected by the coaxial connector are placed on the support frame 3 as a whole, and the large-head pipe fitting 11 and the small-head pipe fitting 12 are driven to rotate circumferentially on the support frame 3, so that continuous circumferential welding of the connected ports can be conveniently realized, further improving the welding operation efficiency.

[0024] Specifically, Figure 5-6 As shown, the coaxial connector includes a large coaxial body 21 and a small coaxial body 22 which are respectively attached to the inner walls of the large head pipe 11 and the small head pipe 12 and are of separate structures, and the large coaxial body 21 and the small coaxial body 22 are detachably coaxially connected. Figure 6As shown, the big head pipe fitting 11 and the small head pipe fitting 12 are sequentially sleeved and fitted on the big coaxial body 21 and the small coaxial body 22, and then the big coaxial body 21 and the small coaxial body 22 are coaxially connected, and the pipe openings of the big head pipe fitting 11 and the small head pipe fitting 12 to be welded are abutted, that is, the coaxial connection between the two is achieved. Then, the big head pipe fitting 11 and the small head pipe fitting 12, which are coaxially positioned and have their pipe openings abutted, are placed on the support frame 3 through the connected big coaxial body 21 and the small coaxial body 22, and the abutting pipe openings of the two are continuously welded in the circumferential direction while driving the big head pipe fitting 11 and the small head pipe fitting 12 to rotate. After the welding is completed, the whole is disassembled from the support frame 3, and the big coaxial body 21 and the small coaxial body 22 are disassembled in reverse, that is, the big head pipe fitting 11 and the small head pipe fitting 12 of the welded integral structure are formed.

[0025] In the above assembly process, in order to facilitate the coaxial connection of the large coaxial body 21 and the small coaxial body 22, preferably, as Figure 5-7 As shown, a connecting screw 2a is provided at the end of the small coaxial body 22 close to the large coaxial body 21, and a connecting hole (not shown in the figure) is opened at the end of the large coaxial body 21. After the large-head pipe fitting 11 and the small-head pipe fitting 12 are sequentially sleeved and fitted on the large coaxial body 21 and the small coaxial body 22, the connecting screw 2a of the small coaxial body 22 is then rotated and connected to the connecting hole of the large coaxial body 21, and the pipe openings of the large-head pipe fitting 11 and the small-head pipe fitting 12 to be welded are abutted, that is, the coaxial connection of the two is achieved, and then the welding operation can be performed.

[0026] In order to facilitate the assembly and disassembly of the large coaxial body 21 and the small coaxial body 22 on the support frame 3, as shown in FIG. Figure 5-7 As shown, the outer side walls of the large coaxial body 21 and the small coaxial body 22 are both provided with support rods 2b; the support frame 3 includes a base 31, on both sides of which vertical support rods 32 are provided, and at the top of each vertical support rod 32, a circular arc groove 33 embedded with the support rod 2b is provided. After the large-head pipe fitting 11 and the small-head pipe fitting 12 are coaxially connected as described above, the support rods 2b on both sides of the large coaxial body 21 and the small coaxial body 22 are placed in the circular arc groove 33, so that the large-head pipe fitting 11 and the small-head pipe fitting 12 are suspended and rotatable, and then the large-head pipe fitting 11 and the small-head pipe fitting 12 are driven to rotate in the circular arc groove 33 to realize the circumferential continuous welding operation of the pipe mouth, and the above-mentioned disassembly operation is performed after the welding is completed.

[0027] Preferably, the vertical support rod 32 is a telescopic structure and is slidably disposed on the base 31 to adapt to the coaxial welding operation of the large-head pipe fittings 11 and the small-head pipe fittings 12 of different lengths and diameters.

[0028] The principle of this application is: when operating, Figure 6As shown, the big-head pipe fitting 11 and the small-head pipe fitting 12 are sequentially sleeved and fitted on the big coaxial body 21 and the small coaxial body 22, and then the connecting screw 2a of the small coaxial body 22 is rotatably connected in the connecting hole of the big coaxial body 21, and the pipe openings of the big-head pipe fitting 11 and the small-head pipe fitting 12 to be welded are abutted against each other, that is, the coaxial connection between the two is realized, and then the support rods 2b on both sides of the big coaxial body 21 and the small coaxial body 22 are placed in the arc groove body 33, so that the big-head pipe fitting 11 and the small-head pipe fitting 12 are suspended and rotatable, and then the big-head pipe fitting 11 and the small-head pipe fitting 12 are driven to rotate in the arc groove body 33 to realize the circumferential continuous welding operation of the pipe openings.

[0029] After the welding is completed, the whole is separated from the support frame 3, and the small coaxial body 22 is rotated in the opposite direction and separated from the large coaxial body 21, so that the large-head pipe fitting 11 and the small-head pipe fitting 12 of an integrated structure are formed.

[0030] The above shows and describes the basic principles, main features and advantages of the present application. Without departing from the spirit and scope of the present application, the present application may have various changes and improvements, which fall within the scope of the present application to be protected.

Claims

1. A coaxial welding auxiliary device for a conical reducer connecting pipe fitting, the conical reducer connecting pipe fitting comprising a large-end pipe fitting (11) and a small-end pipe fitting (12) having the same pipe diameter at a single-side port, characterized in that: The welding auxiliary device comprises a coaxial connector that coaxially connects a large-head pipe (11) and a small-head pipe (12) and drives the ports to be welded to abut against each other, and also comprises a support frame (3) that supports and drives the coaxial connector to rotate axially.

2. The welding auxiliary device according to claim 1, characterized in that: The coaxial connector comprises a large coaxial body (21) and a small coaxial body (22) which are in separate structures and are sequentially attached to the inner walls of the large-head tube (11) and the small-head tube (12), and the large coaxial body (21) and the small coaxial body (22) are detachably coaxially connected.

3. The welding auxiliary device according to claim 2, characterized in that: A connecting screw (2a) is provided at the end of the small coaxial body (22) close to the large coaxial body (21), and a connecting hole is opened at the end of the large coaxial body (21).

4. The welding auxiliary device according to claim 3, characterized in that: The outer side walls of the large coaxial body (21) and the small coaxial body (22) are both provided with support rods (2b); The support frame (3) comprises a base (31), vertical support rods (32) are arranged on both sides of the base (31), and a circular arc groove body (33) embedded in the support rod (2b) is arranged at the top end of each vertical support rod (32).

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