CN210848880U - Weld joint preheating tool - Google Patents

Abstract

The utility model belongs to the technical field of mechanical welding, especially, relate to a welding seam preheats instrument. This preheat instrument includes carrier, a plurality of support piece, a plurality of roast rifle mouth and first gas pipe connector, wherein, the carrier is the pipeline that is closed loop, and is a plurality of the support piece interval sets up the inboard of carrier, it is a plurality of roast rifle mouth interval sets up the inboard of carrier, every roast rifle mouth all with the inside intercommunication of carrier, first gas pipe connector with the carrier intercommunication. The utility model discloses owing to adopt a plurality of roast rifle mouths to preheat simultaneously welding workpiece's welding seam, can improve heating efficiency to can avoid treating the phenomenon that the difference in temperature is big appears in each position in welding region, the heating is even, in order to improve welding quality, also can alleviate operative employee's intensity of labour, has fine practicality.

Description

Weld joint preheating tool

Technical Field

The utility model belongs to the technical field of mechanical welding, especially, relate to a welding seam preheats instrument.

Background

According to the welding standard regulation of the rail wagon: in a railway wagon, when welding base metal carbon equivalent (CE is more than or equal to 0.4%), the weldability is poor, and the method belongs to a difficult-to-weld material, and technically adopts a method of preheating the two sides of a part to be welded to 200 +/-50 ℃ within a range of 75mm before welding and then welding.

The key part of the center sill of the railway wagon is characterized in that an upper center plate is made of C-grade steel, a part to be welded is an annular welding line, the carbon equivalent CE of the C-grade steel is more than or equal to 0.6%, and the whole area to be welded is preheated to 200 +/-50 ℃ and then welded according to requirements.

In the prior art, a centralized baking gun of G01-1000 type is generally used for preheating the whole area to be welded.

In carrying out the present invention, the applicant has found that there are at least the following problems in the prior art:

in the prior art, the baking gun can only heat a single point step by step, a weld seam with the length of 100mm is heated to 200 +/-50 ℃ for more than 1 minute, the heating efficiency is low, and because the single point step heating is adopted, the temperature difference of each part of a region to be welded is large, and the heating is uneven; in addition, due to low heating efficiency and long waiting time of operators, the phenomenon of operation violating the process requirements often occurs in actual production, and the welding quality is seriously influenced.

SUMMERY OF THE UTILITY MODEL

To the problem that above-mentioned prior art exists, the utility model provides a welding seam preheats instrument to solve prior art, the heating efficiency that the single-point progressively heated and brought is low, the inhomogeneous problem of bringing of heating.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

a weld preheating tool, the preheating tool comprising:

the carrier is a closed-loop pipeline;

a plurality of supporting pieces which are arranged at intervals on the inner side of the carrier;

the baking gun nozzles are arranged on the inner side of the carrier at intervals, and each baking gun nozzle is communicated with the inside of the carrier;

a first gas tube connection in communication with the carrier.

Furthermore, one end, far away from the carrier, of each support piece is encircled to form a first circle, one end, far away from the carrier, of each baking gun nozzle is encircled to form a second circle, the second circle and the first circle are arranged in a concentric mode, and the radius of the second circle is larger than that of the first circle.

Furthermore, the radius of the second circle is 10-20 mm larger than that of the first circle.

Further, the plurality of supporting members and the plurality of baking gun nozzles are arranged on the inner side of the carrier at equal intervals, and the central axes of the plurality of supporting members and the central axes of the plurality of baking gun nozzles are located on the same circumference.

Furthermore, the middle part between two adjacent supporting pieces is provided with the baking gun mouth.

Optionally, the length of each support is adjustably set.

Further, each of the lance nozzles is detachably disposed inside the carrier.

Further, the carrier is an annular pipe.

Further, the preheating tool further comprises a connecting pipeline, two ends of the connecting pipeline are communicated with the carrier, and the first gas pipe joint is connected to the connecting pipeline.

Still further, the preheating tool further comprises a second air pipe connector, and the second air pipe connector is also connected to the connecting pipeline.

The utility model has the advantages that:

through the utility model discloses a when welding seam preheating tool treats welding workpiece's welding seam preheating, with the carrier suit in the outside of treating welding workpiece's the regional of preheating of treating, the welding workpiece is treated in the support piece contact of the inboard of carrier to the interval setting, feeds the natural gas to the interval setting at a plurality of roast rifle mouths intervals of the inboard of carrier through first gas coupling to can make the rifle mouth light gas, nozzle work, preheat in order to treat welding workpiece's welding seam.

The utility model discloses owing to adopt a plurality of roast rifle mouths to preheat simultaneously welding workpiece's welding seam, can improve heating efficiency to can avoid treating the phenomenon that the difference in temperature is big appears in each position in welding region, the heating is even, in order to improve welding quality, also can alleviate operative employee's intensity of labour, has fine practicality.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural view of a welding seam preheating tool according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Fig. 1 is a schematic structural diagram of a welding seam preheating tool according to an embodiment of the present invention, and referring to fig. 1, the preheating tool includes a carrier 1, a support member 2, a gun nozzle 3, and a first gas pipe joint 4, wherein the carrier 1 is a closed-loop pipe, a plurality of support members 2 are arranged at intervals inside the carrier 1, and the plurality of support members 2 are in contact with a workpiece to be welded, so that the carrier 1 is in a fixed state; a plurality of roast rifle mouth 3 intervals set up in the inboard of carrier 1, every roast rifle mouth 3 all with the inside intercommunication of carrier 1 for treat the welding seam simultaneous heating of welding workpiece, and first gas coupling 4 is used for and outside natural gas source intercommunication, first gas coupling 4 and carrier 1 intercommunication to required natural gas when providing the burning of roast rifle mouth 3.

With reference to fig. 1, in the embodiment of the present invention, one end of the carrier 1 is enclosed into a first circle by the supporting members 2, one end of the carrier 1 is enclosed into a second circle by the baking gun nozzles 3, the second circle and the first circle are concentrically arranged, and the radius of the second circle is greater than the radius of the first circle, so that the action area of the baking gun nozzles 3 during combustion is larger, and the highest point of the combustion temperature contacts the workpiece to be welded, thereby improving the heating efficiency.

When the welding part of the upper center plate of the central beam of the key part of the railway wagon is preheated, the radius of the second circle is larger than that of the first circle by 10-20 mm, and the preheating effect under the condition is the best.

With reference to fig. 1, in the embodiment of the present invention, the plurality of supporting members 2 and the plurality of baking gun nozzles 3 are equally spaced and disposed inside the carrier 1, and the central shafts of the plurality of supporting members 2 and the plurality of baking gun nozzles 3 are located on the same circumference, that is, the supporting members 2 and the baking gun nozzles 3 are spaced and staggered, and the baking gun nozzles 3 disposed at equal intervals can also avoid the phenomenon of non-uniform heating.

Referring to fig. 1, in the embodiment of the present invention, a pistol mouth 3 may be disposed in the middle between two adjacent supporting members 2.

It should be noted that a plurality of baking gun nozzles 3 may also be disposed in the middle between two adjacent supporting members 2, that is, the number of the baking gun nozzles may be designed according to the overall dimension of the weld of the workpiece to be welded.

Referring to fig. 1, a cross section of the supporting member 2 according to the embodiment of the present invention is an arch, and a length thereof is fixedly set and is welded or integrally formed with the carrier 1.

For the embodiment shown in fig. 1, the cross section of the to-be-welded workpiece that is suitable for is regular cylinder, and to some irregular to-be-welded workpieces in cross section, the embodiment of the utility model discloses can be adjustable with support piece 2's length setting and solve this problem, through the length of adjusting every support piece 2, make support piece 2 contact the to-be-welded workpiece to fixed carrier 1, correspondingly, a plurality of roast rifle mouth 3 can be dismantled and set up in the inboard of carrier 1, just so can be through the roast rifle mouth 3 of selecting suitable length, adjust roast rifle mouth 3 with to treat the distance of to-be-welded workpiece, avoid appearing the difference in temperature, the inhomogeneous phenomenon of heating takes place.

The length-adjustable arrangement of the support 2 can be realized by: for example, the inside of carrier 1 is provided with the screw hole, and support piece 2 is shaft-like, through the precession back-and-forth of support piece 2 in the screw hole that corresponds to adjust support piece 2's length, perhaps, support piece 2 includes two threaded connection's sleeve, through the back-and-forth of screwing between two sleeves, with adjustment support piece 2's length, support piece 2 adjustable length certainly also can realize through other modes, the embodiment of the utility model discloses do not do the restriction to this.

In the embodiment of the utility model provides an in, 3 accessible threaded connection of roast rifle mouth are in the inboard of carrier 1 to realize the quick assembly disassembly of roast rifle mouth 3.

Referring to fig. 1, the carrier 1 according to the embodiment of the present invention is a circular pipe, has rigidity, can maintain a fixed shape, and can transport a combustion medium.

With reference to fig. 1, the preheating tool of the embodiment of the present invention further includes a connection pipeline 5, both ends of the connection pipeline 5 are all connected to the carrier 1, and the first gas pipe joint 4 is connected to the connection pipeline 5, so that the first gas pipe joint 4 and the carrier 1 can be connected.

First trachea joint 4 is used for carrying the necessary natural gas when roast rifle mouth 3 burns, combines figure 1 for improving roast rifle mouth 3's combustion efficiency, the utility model discloses the instrument of preheating still includes second trachea joint 6, and second trachea joint 6 also connects on connecting tube 4 to realize its and carrier 1's intercommunication, second trachea joint 6 is used for carrying oxygen, in order to play combustion-supporting effect, improves heating efficiency.

Through the utility model discloses a welding seam preheating tool treats welding workpiece's welding seam and preheats, specifically includes:

respectively and tightly connecting the oxygen leather hose and the natural gas leather hose with a second gas pipe joint 6 and a first gas pipe joint 4;

placing a weld preheating tool around the workpiece to be heated, with each support 2 contacting the workpiece;

opening a natural gas valve, and igniting gas from the baking gun nozzle 3 to burn;

an oxygen valve is opened to achieve the combustion-supporting effect and improve the heating efficiency;

measuring the temperature of the workpiece by using a temperature measuring gun, and when the temperature reaches the temperature required by the process, closing an oxygen valve and then closing a natural gas valve;

and moving out the welding seam preheating tool to start welding operation.

To sum up, the embodiment of the utility model provides a preheat simultaneously to the welding seam of welding workpiece owing to adopt a plurality of roast rifle mouths to, can improve heating efficiency to can avoid treating the phenomenon that the difference in temperature is big appears in each position in welding area, the heating is even, in order to improve welding quality, also can alleviate operative employee's intensity of labour, has fine practicality.

The following embodiments are preferred embodiments of the present invention, which are only used to facilitate the description of the present invention, and are not intended to limit the present invention in any form, and any person who knows commonly in the art can use the present invention to make local changes or modifications within the scope of the technical features of the present invention, and the technical features of the present invention are not separated from the present invention.

Claims (10)

1. A weld preheating tool, comprising:

the carrier is a closed-loop pipeline;

a plurality of supporting pieces which are arranged at intervals on the inner side of the carrier;

the baking gun nozzles are arranged on the inner side of the carrier at intervals, and each baking gun nozzle is communicated with the inside of the carrier;

a first gas tube connection in communication with the carrier.

2. The weld preheating tool according to claim 1, wherein ends of the plurality of supporting members, which are away from the carrier, define a first circle, ends of the plurality of lance nozzles, which are away from the carrier, define a second circle, the second circle and the first circle are concentrically arranged, and a radius of the second circle is greater than a radius of the first circle.

3. The weld preheating tool according to claim 2, wherein the radius of the second circle is greater than the radius of the first circle by a dimension of 10 to 20 mm.

4. The weld preheating tool according to claim 1, wherein a plurality of the support members and a plurality of the lance nozzles are equally spaced inside the carrier, and central axes of the plurality of the support members and central axes of the plurality of the lance nozzles are located on the same circumference.

5. The weld preheating tool according to claim 4, wherein one of the lance nozzles is provided in a middle portion between two adjacent ones of the support members.

6. The weld preheating tool according to any one of claims 1 to 5, wherein the length of each support member is adjustably set.

7. The weld preheating tool according to claim 6, wherein each of the lance nozzles is detachably disposed inside the carrier.

8. The weld preheating tool according to any one of claims 1 to 5, wherein the carrier is an annular pipe.

9. The weld preheating tool according to any one of claims 1 to 5, further comprising a connecting pipe, both ends of which communicate with the carrier, the first gas pipe joint being connected to the connecting pipe.

10. The weld preheating tool of claim 9, further comprising a second gas pipe fitting also connected to the connecting tube.

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