Auxiliary heat treatment equipment of steel pipe heat treatment energy-saving furnace

Abstract

The utility model discloses auxiliary heat treatment equipment of a steel pipe heat treatment energy-saving furnace, which relates to the technical field of pipeline welding auxiliary equipment and comprises a support, and a heat preservation cover is arranged at the top of the support. A flue gas treatment device is arranged on the support and comprises a gas inlet pipe, a flue gas filtering box and a gas outlet pipe, the gas inlet pipe is located at the top of the inner wall of the heat preservation box and communicated with the interior of the heat preservation box, a supporting plate is arranged at the bottom of the heat preservation box, and a plurality of gas outlet holes are formed in the supporting plate; the air outlet pipe is communicated with the air outlet hole; when the heat preservation cover is in a buckled state, a closed airflow channel is formed among the air inlet pipe, the smoke filtering box and the air outlet pipe. Therefore, the thermal insulation cover is arranged, the flue gas treatment device is utilized, and high-temperature air generated in the welding process is recycled and reused, so that a heated welding part is quenched and tempered, the welding quality is further ensured, and the processing treatment of subsequent procedures is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline welding auxiliary equipment, in particular to auxiliary heat treatment equipment for a steel pipe heat treatment energy-saving furnace. Background Art

[0002] Welding is one of the most effective connection methods so far, especially for high-pressure steel pipes, the sealing effect after welding is particularly obvious. Welding is a method of bonding metals together by melting at high temperature. Since high temperature will change the properties of metals, in order to facilitate subsequent processing and ensure the welding quality of welds, some pipelines, such as aluminum alloy parts, have more heat treatment processes after welding, mainly including quenching, tempering, and tempering. Among them, the tempering process is to keep the welded part at a certain temperature and then slowly cool it down. In this way, after eliminating stress, the welded part can maintain a certain toughness, which is convenient for subsequent processing.

[0003] In the prior art, there is a patent document with the publication number CN 217394107 U, entitled a welding heat preservation device. In this document, a box is provided, and an arc-shaped cover is provided on the top of the box to achieve the heat preservation of the workpiece in the box, so as to achieve the effect of quenching and tempering. When the device is used, it is mainly used for tubular workpieces, and a large amount of smoke will appear during the welding process. If it is not ventilated in time, it will interfere with the welding process. In addition, the heat of the device comes from secondary heating, so an additional heat source needs to be provided, which increases energy consumption and is not very practical. Utility Model Content

[0004] In order to overcome the above-mentioned defects, the purpose of the utility model is to provide an auxiliary heat treatment equipment for a steel pipe heat treatment energy-saving furnace, which, by setting a heat preservation cover and utilizing a fume treatment device, recycles and reuses the high-temperature air generated during the welding process, thereby achieving tempering treatment on the heated welding parts, thereby ensuring the welding quality and facilitating the processing of subsequent processes.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an auxiliary heat treatment equipment for a steel pipe heat treatment energy-saving furnace, comprising a bracket, a heat preservation cover is provided on the top of the bracket; a flue gas treatment device is provided on the bracket, and the flue gas treatment device comprises an air inlet pipe, a flue gas filter box and an air outlet pipe, the air inlet pipe is located at the top of the inner wall of the heat preservation box and is connected to the interior of the heat preservation box, a support plate is provided at the bottom of the heat preservation box, a plurality of air outlet holes are provided on the support plate, and the air outlet pipe is connected to the air outlet holes; when the heat preservation cover is in a buckled state, a closed airflow channel is formed between the air inlet pipe, the flue gas filter box and the air outlet pipe.

[0006] Preferably, one end of the heat-insulating cover is hinged to the bracket via a pin, and the other end is connected to the bracket via a movable buckle, and a sealing rubber pad is clamped between the heat-insulating cover and the bracket.

[0007] Preferably, the heat-insulating cover is formed by welding a square tube and a baffle, and the middle part of the square tube is a smoke channel.

[0008] Preferably, the smoke filter box includes an insulating shell and a smoke filter located in the insulating shell, the air inlet end of the smoke filter is connected to the air inlet pipe, the air outlet end of the smoke filter is connected to the air outlet pipe, and a fan is also connected between the air inlet pipe and the air outlet pipe.

[0009] Preferably, a heating wire is further provided in the smoke filter box, and the heating wire is connected to a heating power source.

[0010] Preferably, guide rollers are respectively provided at both ends of the bracket, and guide baffles are also provided at both ends of the guide roller rotation axis.

[0011] After adopting the above technical solution, the beneficial technical effects achieved by the utility model are:

[0012] 1. The bracket is used to support the equipment and can be used directly as a welding stand. During the welding process, a large amount of high-heat gas and smoke will enter the smoke filter box from the air inlet pipe on the top of the insulation cover, and then enter the insulation cover from the air outlet pipe. In this way, the air temperature in the insulation cover can be increased without additional heating. The cooling effect will last longer, so the tempering effect of the pipeline after welding will be better.

[0013] 2. Since the heat preservation cover is formed by welding the square tube and the baffle, the middle part of the square tube is the smoke channel. The square tube itself is hollow and has good sealing performance. It can be used as an airflow channel by directly opening holes. In this way, it is sufficient to add sealing pads at the connection. The processing and manufacturing cost is lower and the practicability is stronger.

[0014] 3. Since there is also a heating wire connected to the heating power supply in the smoke filter box, when the circulating air temperature is obviously too low to meet the requirements of quenching and tempering the weld, the heat provided by the heating wire can be used. This is especially suitable for areas with large temperature differences. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of an embodiment of the auxiliary heat treatment equipment of the utility model steel pipe heat treatment energy-saving furnace (part of the baffles and pipelines in the heat insulation cover are hidden);

[0016] Figure 2 yes Figure 1 A front view of

[0017] In the figure, 1, bracket; 11, guide roller; 12, guide baffle;

[0018] 2. Insulation cover; 21. Support plate; 22. Air outlet; 23. Movable buckle;

[0019] 3. Flue gas treatment device; 31. Air inlet pipe; 32. Flue gas filter box; 33. Air outlet pipe. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] See also Figure 1-Figure 2 The utility model provides an auxiliary heat treatment device for a steel pipe heat treatment energy-saving furnace, comprising a bracket 1, a heat preservation cover 2 is arranged on the top of the bracket 1; a flue gas treatment device 3 is arranged on the bracket 1, and the flue gas treatment device 3 comprises an air inlet pipe 31, a flue gas filter box 32 and an air outlet pipe 33, the air inlet pipe 31 is located at the top of the inner wall of the heat preservation box and communicates with the inside of the heat preservation box, a support plate 21 is arranged at the bottom of the heat preservation box, a plurality of air outlet holes 22 are arranged on the support plate 21, and the air outlet pipe 33 communicates with the air outlet holes 22; when the heat preservation cover 2 is in a buckled state, a closed air flow channel is formed between the air inlet pipe 31, the flue gas filter box 32 and the air outlet pipe 33. The bracket 1 is used for support. Generally, for the convenience of welding, a welding bracket 1 (not shown in the figure) is arranged on the support plate 21 at the top of the bracket 1, and welding is directly used to clamp and fix the workpiece to be welded, and cooperate with the welding gun of automatic welding to quickly weld the pipe fittings.

[0022] The utility model is only applicable to the heat preservation process during welding and the heat preservation of the workpiece after welding. The method adopted is to reduce the temperature difference, extend the heat preservation time, and improve the quality of tempering through circulating hot air, but it cannot change the weld defects caused by welding itself. During the welding process, the smoke generated, the air blown out through the air outlet 22 below, enters the air inlet pipe 31, and then passes through the smoke filter box 32 in the smoke treatment device 3. After filtering, it finally returns to the heat preservation cover 2. Since there is a certain amount of heat in the air at this time, it can ensure that the temperature difference of the air around the weld will not be too large, and the time for slow cooling will be longer, so the tempering treatment of the workpiece can be better achieved. The smoke treatment device 3 is an existing equipment and can be purchased directly according to requirements.

[0023] One end of the heat preservation cover 2 of the utility model is hinged to the bracket 1 through a pin, and the other end is connected to the bracket 1 through an active buckle 23. A sealing pad is clamped between the heat preservation cover 2 and the bracket 1. During welding, the workpiece is generally exposed to the air as a whole. If it is an automatic welding device, the heat preservation cover 2 can be fixed at a certain angle so as not to interfere with the welding process. Due to air circulation, the interference of smoke during welding can be reduced. After welding is completed, the temperature at the weld on the workpiece is still very high. At this time, after the heat preservation cover 2 is buckled, the active buckle 23 is fixed. When the smoke treatment device 3 continues to work, the smoke in the heat preservation cover 2 will be sucked into the smoke filter box 32, and the smoke will be filtered, and the hot air will circulate in the heat preservation cover 2. Since the heat preservation cover 2 cannot be completely sealed, air will still enter from the gaps around it and participate in the circulation, which does not affect the overall quenching and tempering effect, but only prolongs the cooling time to a certain extent to prevent the weld from cooling rapidly due to a sharp drop in temperature.

[0024] The heat preservation cover 2 of the utility model is formed by welding a square tube and a baffle, and the middle part of the square tube is a smoke passage. The square tube is generally a galvanized tube, which is a standard part in the building. It can be directly purchased and processed according to the required size. The square tube is hollow, and the sealing will be better after adding a rubber pad. The inside of the square tube is used as a smoke passage, and with the auxiliary air intake pipe 31, a complete airflow circulation can be achieved.

[0025] The smoke filter box 32 of the utility model includes a heat-insulating shell and a smoke filter located in the heat-insulating shell, the air inlet end of the smoke filter is connected to the air inlet pipe 31, the air outlet end of the smoke filter is connected to the air outlet pipe 33, and a fan is also connected between the air inlet pipe 31 and the air outlet pipe 33. The fan can be arranged in the heat-insulating cover 2, or between the air inlet pipe 31 and the air outlet pipe 33, and its main function is to provide power for air circulation.

[0026] The two ends of the support 1 of the utility model are respectively provided with guide rollers 11, and the two ends of the rotating shaft of the guide roller 11 are also provided with guide baffles 12. Some pipe fittings are welded on a professional fixed frame. After welding, the guide rollers 11 and guide baffles 12 on both sides can be used to place the workpiece in the heat preservation cover 2. Generally, this process is suitable for batches of workpieces. If the outside temperature is too low, electric heating wires and heating power supplies should be used to pass the heated air into the heat preservation cover 2 to control the temperature and realize the tempering treatment of batches of workpieces.

[0027] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A steel pipe heat treatment energy-saving furnace auxiliary heat treatment equipment, characterized in that: It comprises a bracket, and a heat preservation cover is provided on the top of the bracket; The bracket is provided with a flue gas treatment device, which includes an air inlet pipe, a flue gas filter box and an air outlet pipe. The air inlet pipe is located at the top of the inner wall of the heat preservation cover and is connected to the inside of the heat preservation cover. The bottom of the heat preservation cover is provided with a support plate, and a plurality of air outlet holes are provided on the support plate. The air outlet pipe is connected to the air outlet holes. When the heat-insulating cover is in the buckled state, a closed airflow channel is formed between the air inlet pipe, the smoke filter box and the air outlet pipe.

2. The auxiliary heat treatment equipment for energy-saving steel pipe heat treatment furnace according to claim 1 is characterized in that: One end of the heat-insulating cover is hinged to the bracket through a pin shaft, and the other end is connected to the bracket through a movable buckle. A sealing rubber pad is clamped between the heat-insulating cover and the bracket.

3. The auxiliary heat treatment equipment for energy-saving steel pipe heat treatment furnace according to claim 2 is characterized in that: The heat-insulating cover is formed by welding a square tube and a baffle, and the middle part of the square tube is a smoke channel.

4. The steel pipe heat treatment energy-saving furnace auxiliary heat treatment equipment according to claim 1 is characterized in that: The smoke filter box comprises a heat-insulating shell and a smoke filter located in the heat-insulating shell, the air inlet end of the smoke filter is connected to the air inlet pipe, the air outlet end of the smoke filter is connected to the air outlet pipe, and a fan is also connected between the air inlet pipe and the air outlet pipe.

5. The auxiliary heat treatment equipment for energy-saving steel pipe heat treatment furnace according to claim 4 is characterized in that: A heating wire is also arranged in the smoke filter box, and the heating wire is connected to a heating power source.

6. The auxiliary heat treatment equipment for energy-saving steel pipe heat treatment furnace according to claim 1, characterized in that: Both ends of the bracket are respectively provided with guide rollers, and both ends of the guide roller rotating shaft are also provided with guide baffles.

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