CN202015905U - Heater for preheating before welding - Google Patents

Heater for preheating before welding Download PDF

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Publication number
CN202015905U
CN202015905U CN201120049516.7U CN201120049516U CN202015905U CN 202015905 U CN202015905 U CN 202015905U CN 201120049516 U CN201120049516 U CN 201120049516U CN 202015905 U CN202015905 U CN 202015905U
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burner
gas tank
compressed air
welding
preheating heater
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李晓红
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Xian Shiyou University
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Xian Shiyou University
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

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Abstract

The utility model discloses a heater for preheating before welding. The heater comprises a pedestal, and a saddle support and a burner bracket which are fixedly arranged on the pedestal; a gas tank is arranged on the saddle support, the bottom of the gas tank is provided with a drainage port, the left side of the gas tank is provided with a compressed air outlet, and the right side of the gas tank is provided with a compressed air inlet; the burner bracket consists of a steel bar I and a steel bar II, and the top of the steel bar II is higher than the steel bar I; a burner supporting plate is arranged at the upper end of the burner bracket, the burner supporting plate is in an arc structure, one end of the burner supporting plate is hinged with the upper end of the steel bar I, and the other end of the burner supporting plate is connected with the upper end of the steel bar II; and burners are arranged on the burner supporting plate, the number of the burners is at least two, and the burner consists of a tapered nozzle and a fuel gas nozzle and a compressed air nozzle which are fixedly connected at the rear end of the tapered nozzle. The heater is simple in structure, reasonable in design and convenient for operating, can effectively realize good preheating of workpieces to be preheated, and is simple to produce and manufacture and low in cost.

Description

焊接前预热用加热器Heater for preheating before welding

技术领域technical field

本实用新型涉及一种焊接辅助装置,尤其是涉及一种焊接前预热用加热器。The utility model relates to a welding auxiliary device, in particular to a heater for preheating before welding.

背景技术Background technique

重要构件、合金钢及厚部件等在焊接前要求预热,其预热的主要作用如下:(1)缓减焊后的冷却速度,有利于焊缝金属中扩散氢的逸出,避免产生的氢致裂纹,减少焊缝及热影响区的淬硬程度,提高焊接接头的抗裂性;(2)降低焊接应力:局部预热或整体预热,可以减少焊接区域与被焊工件之间的温度差(也称为温度梯度),这样,一方面降低了焊接应力,另一方面,降低了焊接应变速率,有利于避免焊接裂纹的产生;(3)降低焊接结构的拘束度,且对降低角接接头的拘束度尤为明显,随着预热温度的提高,裂纹发生率下降。而目前国内普遍使用的氧-乙炔加热器,因结构设计不合理,不能很好的实现对需热量较大的待预热工件的良好预热。Important components, alloy steel and thick parts require preheating before welding. The main functions of preheating are as follows: (1) Slow down the cooling rate after welding, which is conducive to the escape of diffusible hydrogen in the weld metal and avoids the generation of Hydrogen-induced cracking can reduce the hardening degree of the weld seam and the heat-affected zone, and improve the crack resistance of the welded joint; (2) Reduce welding stress: local preheating or overall preheating can reduce the distance between the welding area and the workpiece to be welded. Temperature difference (also known as temperature gradient), so that, on the one hand, the welding stress is reduced, and on the other hand, the welding strain rate is reduced, which is conducive to avoiding the generation of welding cracks; (3) reducing the restraint of the welding structure, and reducing the The restraint degree of the fillet joints is particularly obvious, and the occurrence rate of cracks decreases with the increase of preheating temperature. At present, the oxy-acetylene heater commonly used in China cannot well preheat the workpiece to be preheated that requires a large amount of heat due to its unreasonable structural design.

实用新型内容Utility model content

本实用新型所要解决的技术问题在于针对上述现有技术中的不足,提供一种焊接前预热用加热器,其结构简单、设计合理且使用操作方便,能有效实现对需热量较大的待预热工件的良好预热,同时生产制造简单,成本低廉。The technical problem to be solved by the utility model is to provide a heater for preheating before welding, which is simple in structure, reasonable in design and easy to use and operate, and can effectively realize the need for larger heat. Good preheating of preheated workpieces, simple production and low cost.

为解决上述技术问题,本实用新型采用的技术方案是:一种焊接前预热用加热器,其特征在于:包括基座以及固定安装在基座上的鞍式支座和燃烧器支架,所述鞍式支座上安装有用于承装燃烧用压缩空气的气罐,所述气罐底部设置有排水口,所述气罐左侧设置有压缩空气出口,所述气罐右侧设置有压缩空气进口,所述燃烧器支架由左右对称设置的钢筋一和钢筋二组成,所述钢筋二的顶部高于钢筋一的顶部,所述燃烧器支架上端安装有燃烧器支撑板,所述燃烧器支撑板呈弧形结构,所述燃烧器支撑板一端与钢筋一上端铰接,所述燃烧器支撑板另一端与钢筋二上端固定连接,所述燃烧器支撑板上安装有燃烧器,所述燃烧器的数量至少为两个,所述燃烧器由锥形烧嘴以及固定连接在锥形烧嘴后端的燃料气喷头和压缩空气喷头组成。In order to solve the above technical problems, the technical solution adopted by the utility model is: a heater for preheating before welding, which is characterized in that it includes a base, a saddle-type support and a burner support fixedly installed on the base. An air tank for holding compressed air for combustion is installed on the saddle support, the bottom of the air tank is provided with a drain port, the left side of the air tank is provided with a compressed air outlet, and the right side of the air tank is provided with a compressed air outlet. The air inlet, the burner bracket is composed of steel bar 1 and steel bar 2 arranged symmetrically from left to right, the top of the steel bar 2 is higher than the top of the steel bar 1, a burner support plate is installed on the upper end of the burner bracket, and the burner The support plate has an arc-shaped structure, one end of the burner support plate is hinged to the upper end of the first steel bar, the other end of the burner support plate is fixedly connected to the upper end of the second steel bar, the burner is installed on the support plate of the burner, and the burner The number of burners is at least two, and the burner is composed of a conical burner and a fuel gas nozzle and a compressed air nozzle fixedly connected to the rear end of the conical burner.

上述的焊接前预热用加热器,其特征在于:还包括固定安装在基座上且便于推动加热器移动的扶手支架,所述扶手支架位于气罐的右侧,所述扶手支架上端设置有扶手。The above-mentioned heater for preheating before welding is characterized in that it also includes an armrest bracket fixedly installed on the base and convenient for pushing the heater to move, the armrest bracket is located on the right side of the gas tank, and the upper end of the armrest bracket is provided with armrest.

上述的焊接前预热用加热器,其特征在于:所述扶手支架为筋板扶手支架。The above heater for preheating before welding is characterized in that: the armrest bracket is a rib plate armrest bracket.

上述的焊接前预热用加热器,其特征在于:还包括设置在气罐上且分别用于对气罐内部压缩空气进行超压泄放的安全阀、用于测量气罐内部压缩空气温度的温度计和用于测量气罐内部压缩空气压力的压力表。The above-mentioned heater for preheating before welding is characterized in that it also includes a safety valve arranged on the gas tank and used to release the overpressure of the compressed air inside the gas tank, and a device for measuring the temperature of the compressed air inside the gas tank. Thermometer and pressure gauge for measuring the pressure of the compressed air inside the tank.

上述的焊接前预热用加热器,其特征在于:还包括设置在燃烧器支撑板一侧且用于降低环境气流对燃烧器的燃烧火焰进行干扰的挡风板,所述挡风板与支撑板固定连接。The above heater for preheating before welding is characterized in that it also includes a windshield arranged on one side of the burner support plate and used to reduce the interference of the ambient air flow on the combustion flame of the burner, the windshield and the support Board fixed connections.

上述的焊接前预热用加热器,其特征在于:所述压缩空气出口、压缩空气进口和排水口均包括接管,所述接管一端位于气罐内部且与气罐相连接,所述接管另一端设置有法兰。The above-mentioned heater for preheating before welding is characterized in that: the compressed air outlet, the compressed air inlet and the drain all include a connecting pipe, one end of the connecting pipe is located inside the gas tank and connected to the gas tank, and the other end of the connecting pipe It is provided with a flange.

上述的焊接前预热用加热器,其特征在于:所述燃烧器的数量为两个,且两个所述燃烧器中心线之间的夹角为15°-25°。The above heater for preheating before welding is characterized in that: the number of the burners is two, and the angle between the centerlines of the two burners is 15°-25°.

上述的焊接前预热用加热器,其特征在于:所述基座底部安装有便于加热器行走的车轮。The above-mentioned heater for preheating before welding is characterized in that wheels are installed on the bottom of the base to facilitate the walking of the heater.

上述的焊接前预热用加热器,其特征在于:所述气罐为密封容器。The above heater for preheating before welding is characterized in that the gas tank is a sealed container.

上述的焊接前预热用加热器,其特征在于:所述燃料气喷头与锥形烧嘴之间以及压缩空气喷头与锥形烧嘴之间的连接方式均为焊接。The above-mentioned heater for preheating before welding is characterized in that the connections between the fuel gas nozzle and the conical burner and between the compressed air nozzle and the conical burner are welding.

本实用新型与现有技术相比具有以下优点:Compared with the prior art, the utility model has the following advantages:

1、结构简单、设计合理且使用操作方便、移动方便。1. Simple structure, reasonable design, convenient operation and movement.

2、能有效实现对需热量较大的待预热工件的良好预热,由于该加热器的燃烧器安装在呈弧形结构的燃烧器支撑板上,且燃烧器的烧嘴为锥形结构,燃烧器的数量可根据需要布设两个或两个以上,因此能增大待预热工件的预热面积,使得待预热工件的预热更加充分、快速。2. It can effectively realize good preheating of workpieces to be preheated that require a large amount of heat, because the burner of the heater is installed on the burner support plate in an arc-shaped structure, and the burner of the burner is a conical structure , The number of burners can be arranged in two or more according to the needs, so the preheating area of the workpiece to be preheated can be increased, so that the preheating of the workpiece to be preheated is more sufficient and fast.

3、生产制造简单,成本低廉。3. The production is simple and the cost is low.

下面通过附图和实施例,对本实用新型做进一步的详细描述。Below by accompanying drawing and embodiment, the utility model is described in further detail.

附图说明Description of drawings

图1为本实用新型的整体结构示意图。Figure 1 is a schematic diagram of the overall structure of the utility model.

图2为图1的俯视图。FIG. 2 is a top view of FIG. 1 .

图3为图1的左视图。Fig. 3 is a left side view of Fig. 1 .

附图标记说明:Explanation of reference signs:

1-压缩空气出口; 2-安全阀;           3-温度计;1-compressed air outlet; 2-safety valve; 3-thermometer;

4-压力表;       5-压缩空气进口;     6-排水口;4-pressure gauge; 5-compressed air inlet; 6-drain outlet;

7-燃烧器支架;   7-1-钢筋一;         7-2-钢筋二;7-burner bracket; 7-1-rebar one; 7-2-rebar two;

8-燃烧器支撑板; 9-燃烧器;           9-1-锥形烧嘴;8-burner support plate; 9-burner; 9-1-conical burner;

9-2-燃料气喷头; 9-3-压缩空气喷头;   10-挡风板;9-2-fuel gas nozzle; 9-3-compressed air nozzle; 10-windshield;

11-气罐;        12-扶手支架;        13-扶手;11-air tank; 12-handrail bracket; 13-handrail;

14-基座;        15-鞍式支座;        16-车轮。14-base; 15-saddle support; 16-wheel.

具体实施方式Detailed ways

如图1、2和3所示的一种焊接前预热用加热器,包括基座14以及固定安装在基座14上的鞍式支座15和燃烧器支架7,所述鞍式支座15上安装有用于承装燃烧用压缩空气的气罐11,所述气罐11底部设置有排水口6,所述气罐11左侧设置有压缩空气出口1,所述气罐11右侧设置有压缩空气进口5,所述燃烧器支架7由左右对称设置的钢筋一7-1和钢筋二7-2组成,所述钢筋二7-2的顶部高于钢筋一7-1的顶部,所述燃烧器支架7上端安装有燃烧器支撑板8,所述燃烧器支撑板8呈弧形结构,所述燃烧器支撑板8一端与钢筋一7-1上端铰接,所述燃烧器支撑板8另一端与钢筋二7-2上端固定连接,所述燃烧器支撑板8上安装有燃烧器9,所述燃烧器9的数量至少为两个,所述燃烧器9由锥形烧嘴9-1以及固定连接在锥形烧嘴9-1后端的燃料气喷头9-2和压缩空气喷头9-3组成。A heater for preheating before welding as shown in Figures 1, 2 and 3, includes a base 14 and a saddle support 15 and a burner support 7 fixedly installed on the base 14, the saddle support 15 is installed with an air tank 11 for holding compressed air for combustion, the bottom of the air tank 11 is provided with a drain port 6, the left side of the air tank 11 is provided with a compressed air outlet 1, and the right side of the air tank 11 is provided with There is a compressed air inlet 5, and the burner bracket 7 is composed of steel bar one 7-1 and steel bar two 7-2 arranged symmetrically. The top of the steel bar two 7-2 is higher than the top of the steel bar one 7-1, so The upper end of the burner bracket 7 is equipped with a burner support plate 8, the burner support plate 8 is an arc structure, one end of the burner support plate 8 is hinged with the upper end of the steel bar 7-1, and the burner support plate 8 The other end is fixedly connected to the upper end of steel bar 2 7-2, and a burner 9 is installed on the burner support plate 8, the number of the burner 9 is at least two, and the burner 9 consists of a conical burner 9- 1 and a fuel gas nozzle 9-2 and a compressed air nozzle 9-3 fixedly connected to the rear end of the conical burner 9-1.

如图1所示,本实用新型还包括固定安装在基座14上且便于推动加热器移动的扶手支架12,所述扶手支架12位于气罐11的右侧,所述扶手支架12上端设置有扶手13。其中,所述扶手支架12为筋板扶手支架。As shown in Figure 1 , the utility model also includes an armrest bracket 12 fixedly installed on the base 14 and convenient to push the heater to move, the armrest bracket 12 is located on the right side of the gas tank 11, and the upper end of the armrest bracket 12 is provided with armrest13. Wherein, the armrest bracket 12 is a rib panel armrest bracket.

如图1和2所示,本实用新型还包括设置在气罐11上且分别用于对气罐11内部压缩空气进行超压泄放的安全阀2、用于测量气罐11内部压缩空气温度的温度计3和用于测量气罐11内部压缩空气压力的压力表4,这样可保证压缩空气处于平稳、安全的所需状态。As shown in Figures 1 and 2, the utility model also includes a safety valve 2 which is arranged on the gas tank 11 and is respectively used to discharge the overpressure of the compressed air inside the gas tank 11, and is used to measure the temperature of the compressed air inside the gas tank 11. The thermometer 3 and the pressure gauge 4 used to measure the compressed air pressure inside the air tank 11 can ensure that the compressed air is in a stable and safe state.

如图1所示,本实用新型还包括设置在燃烧器支撑板8一侧且用于降低环境气流对燃烧器9的燃烧火焰进行干扰的挡风板10,所述挡风板10与支撑板8固定连接。As shown in Figure 1, the utility model also includes a windshield 10 arranged on one side of the burner support plate 8 and used to reduce the interference of the ambient air flow on the combustion flame of the burner 9, the windshield 10 and the support plate 8 fixed connections.

如图1所示,所述压缩空气出口1、压缩空气进口5和排水口6均包括接管,所述接管一端位于气罐11内部且与气罐11相连接,所述接管另一端设置有法兰。As shown in Figure 1, the compressed air outlet 1, the compressed air inlet 5 and the drain 6 all include a connecting pipe, one end of the connecting pipe is located inside the air tank 11 and connected to the air tank 11, and the other end of the connecting pipe is provided with a orchid.

如图1所示,所述燃烧器9的数量为两个,且两个所述燃烧器9中心线之间的夹角为15°-25°,中心线的焦点则是燃烧火焰的聚集点,也是待预热工件需要预热的焊缝部位,且这样的角度使得待预热工件的预热面积较大,预热更加充分,另外,可根据实际需要设置更多数量的燃烧器。As shown in Figure 1, the number of the burners 9 is two, and the angle between the centerlines of the two burners 9 is 15°-25°, and the focal point of the centerlines is the gathering point of the combustion flame , is also the part of the weld seam that needs to be preheated, and this angle makes the preheating area of the workpiece to be preheated larger, and the preheating is more sufficient. In addition, more burners can be set according to actual needs.

如图1所示,所述基座14底部安装有便于加热器行走的车轮16,车轮16的设置使得加热器实现可自由移动。As shown in FIG. 1 , wheels 16 are installed on the bottom of the base 14 to facilitate the walking of the heater. The setting of the wheels 16 enables the heater to move freely.

所述气罐11为密封容器。The gas tank 11 is a sealed container.

所述燃料气喷头9-2与锥形烧嘴9-1之间以及压缩空气喷头9-3与锥形烧嘴9-1之间的连接方式均为焊接。The connections between the fuel gas nozzle 9-2 and the conical burner 9-1 and between the compressed air nozzle 9-3 and the conical burner 9-1 are welding.

本实用新型的工作过程为:首先在压缩空气出口1处安装气体开关阀一,并在气体开关阀一上连接软管一,同时采用软管二连接乙炔气体,且软管二上安装有气体开关阀二,然后将软管一的另一端与压缩空气喷头9-3相接,软管二的另一端与燃料气喷头9-2相接,则两种气体在锥形烧嘴9-1内混合,这时在锥形烧嘴9-1前端处对混合气体进行点燃,即可实现对待预热工件的预热。The working process of the utility model is as follows: first, the gas switching valve 1 is installed at the compressed air outlet 1, and the hose 1 is connected to the gas switching valve 1, and the acetylene gas is connected with the hose 2 at the same time, and the gas switching valve is installed on the hose 2. Switch valve 2, and then connect the other end of hose 1 with compressed air nozzle 9-3, and the other end of hose 2 with fuel gas nozzle 9-2, then the two gases will flow through the conical burner 9-1 At this time, the mixed gas is ignited at the front end of the conical burner 9-1 to realize the preheating of the workpiece to be preheated.

以上所述,仅是本实用新型的较佳实施例,并非对本实用新型作任何限制,凡是根据本实用新型技术实质对以上实施例所作的任何简单修改、变更以及等效结构变化,均仍属于本实用新型技术方案的保护范围内。The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the present utility model still belong to Within the scope of protection of the technical solution of the utility model.

Claims (10)

1. preheating heater before the welding, it is characterized in that: comprise pedestal (14) and be fixedly mounted on saddle support (15) and burner arm (7) on the pedestal (14), be equipped with on the described saddle support (15) to be used to take up and burn with compressed-air actuated gas tank (11), described gas tank (11) bottom is provided with discharge outlet (6), described gas tank (11) left side is provided with compressed air outlet (1), described gas tank (11) right side is provided with compressed air inlet (5), described burner arm (7) is made up of reinforcing bar one (7-1) that is symmetrical set and reinforcing bar two (7-2), the top of described reinforcing bar two (7-2) is higher than the top of reinforcing bar one (7-1), described burner arm (7) upper end is equipped with burner gripper shoe (8), the curved structure of described burner gripper shoe (8), described burner gripper shoe (8) one ends and reinforcing bar one (7-1) upper end are hinged, described burner gripper shoe (8) other end is fixedlyed connected with reinforcing bar two (7-2) upper end, burner (9) is installed on the described burner gripper shoe (8), the quantity of described burner (9) is at least two, and described burner (9) is made up of taper burner (9-1) and the fuel gas shower nozzle (9-2) and the compressed air shower nozzle (9-3) that are fixedly connected on taper burner (9-1) rear end.
2. according to preheating heater before the described welding of claim 1, it is characterized in that: comprise that also being fixedly mounted on pedestal (14) goes up and be convenient to promote the armrest support (12) that heater moves, described armrest support (12) is positioned at the right side of gas tank (11), and described armrest support (12) upper end is provided with handrail (13).
3. according to preheating heater before the described welding of claim 2, it is characterized in that: described armrest support (12) is the gusset armrest support.
4. according to preheating heater before the described welding of claim 1, it is characterized in that: also comprise being arranged on the gas tank (11) and being respectively applied for gas tank (11) internal compression air is carried out the safety valve (2) of overpressure relief, the Pressure gauge (4) that is used to measure the thermometer (3) of gas tank (11) internal compression air themperature and is used to measure gas tank (11) internal compression air pressure.
5. according to preheating heater before the described welding of claim 1, it is characterized in that: comprise also being arranged on burner gripper shoe (8) one sides and being used to reduce the deep bead (10) that ambient windstream disturbs the combustion flame of burner (9) that described deep bead (10) is fixedlyed connected with gripper shoe (8).
6. according to preheating heater before the described welding of claim 1, it is characterized in that: described compressed air outlet (1), compressed air inlet (5) and discharge outlet (6) include adapter, described adapter one end is positioned at gas tank (11) inside and is connected with gas tank (11), and the described adapter other end is provided with flange.
7. according to preheating heater before the described welding of claim 1, it is characterized in that: the quantity of described burner (9) is two, and the angle between two described burners (9) center line is 15 °-25 °.
8. according to preheating heater before the described welding of claim 1, it is characterized in that: described pedestal (14) bottom is equipped with the wheel (16) of being convenient to the heater walking.
9. according to preheating heater before the described welding of claim 1, it is characterized in that: described gas tank (11) is an airtight container.
10. according to preheating heater before the described welding of claim 1, it is characterized in that: between described fuel gas shower nozzle (9-2) and the taper burner (9-1) and the connected mode between compressed air shower nozzle (9-3) and the taper burner (9-1) be welding.
CN201120049516.7U 2011-02-28 2011-02-28 Heater for preheating before welding Expired - Fee Related CN202015905U (en)

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CN201120049516.7U CN202015905U (en) 2011-02-28 2011-02-28 Heater for preheating before welding

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Application Number Priority Date Filing Date Title
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103148485A (en) * 2013-03-22 2013-06-12 宁波明欣化工机械有限责任公司 Thick plate preheating type heater
CN104028923A (en) * 2014-05-28 2014-09-10 森松(江苏)重工有限公司 Special cylinder-adjustable flame heating tool
CN105397354A (en) * 2015-12-20 2016-03-16 安徽伟宏钢结构集团股份有限公司 Welding preheating method for arc-shaped steel component
CN107717281A (en) * 2017-11-24 2018-02-23 张化机(苏州)重装有限公司 A kind of double-row type weld seam preheats dolly
CN108436334A (en) * 2018-04-01 2018-08-24 上海外高桥造船有限公司 Mobile electric heater
CN111230382A (en) * 2020-02-20 2020-06-05 高峰 Valve and flange connection welding processing technology
CN111822905A (en) * 2020-07-13 2020-10-27 江苏振光电力设备制造有限公司 Automatic welding device for iron tower connecting plate assembly
CN112756872A (en) * 2021-01-18 2021-05-07 北京博清科技有限公司 Welding robot and welding robot control method

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103148485A (en) * 2013-03-22 2013-06-12 宁波明欣化工机械有限责任公司 Thick plate preheating type heater
CN103148485B (en) * 2013-03-22 2015-05-13 宁波明欣化工机械有限责任公司 Thick plate preheating type heater
CN104028923A (en) * 2014-05-28 2014-09-10 森松(江苏)重工有限公司 Special cylinder-adjustable flame heating tool
CN105397354A (en) * 2015-12-20 2016-03-16 安徽伟宏钢结构集团股份有限公司 Welding preheating method for arc-shaped steel component
CN107717281A (en) * 2017-11-24 2018-02-23 张化机(苏州)重装有限公司 A kind of double-row type weld seam preheats dolly
CN107717281B (en) * 2017-11-24 2024-02-23 张化机(苏州)重装有限公司 Double-row type welding seam preheating trolley
CN108436334A (en) * 2018-04-01 2018-08-24 上海外高桥造船有限公司 Mobile electric heater
CN111230382A (en) * 2020-02-20 2020-06-05 高峰 Valve and flange connection welding processing technology
CN111822905A (en) * 2020-07-13 2020-10-27 江苏振光电力设备制造有限公司 Automatic welding device for iron tower connecting plate assembly
CN112756872A (en) * 2021-01-18 2021-05-07 北京博清科技有限公司 Welding robot and welding robot control method

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