Welding back protection device for stainless steel pressure container

Abstract

The utility model discloses a stainless steel pressure vessel welding back protection device, and particularly relates to the technical field of stainless steel pressure vessel welding auxiliary devices, the stainless steel pressure vessel welding back protection device comprises two argon protection boxes arranged in a stainless steel pressure vessel, and a connecting mechanism is arranged between the two argon protection boxes; an opening in one side of the argon protection box is fixedly connected with an elastic skirt edge, and the middle of the argon protection box is fixedly connected with a visual device. According to the argon protection box, the two argon protection boxes are connected through the connecting mechanism, the two argon protection boxes can be matched with the connecting mechanism and supported and limited in the middle of the argon protection boxes, the openings of the argon protection boxes can correspond to welding positions through the elastic skirt edges, and the argon protection boxes can be conveniently connected with a gas conveying pipe through the gas connecting openings; therefore, argon is input into the argon protection box, the back face of the welding seam can be effectively protected, the usage amount of the argon can be reduced, the welding efficiency is improved, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to stainless steel pressure vessel welding auxiliary device technical field, more specifically, the utility model relates to a stainless steel pressure vessel welding back protection device. BACKGROUND

[0002] In modern industrial production, large cylindrical stainless steel pressure vessels are widely used, for example, in chemical industry, food industry, pharmaceutical industry and the like. These vessels are used for storing and transporting various liquid or gaseous media, and the welding quality of the girth weld is crucial to the safety and reliability of the pressure vessel.

[0003] At present, when welding the girth weld of a large cylindrical stainless steel pressure vessel, if argon arc welding is used for the backing process, in order to prevent the back of the weld from being oxidized and ensure the welding quality, argon gas is usually filled into the back of the weld for protection. Argon gas has the characteristics of stable chemical properties and is not easy to react with other substances, which can effectively isolate air and avoid the reaction of the weld with oxygen, nitrogen and the like at high temperature, thereby improving the quality and corrosion resistance of the weld.

[0004] However, for a large stainless steel pressure vessel, the method of filling argon gas into the entire interior of the vessel has many drawbacks. On the one hand, since the volume of the vessel is large, it takes a lot of time to completely fill it with argon gas, which greatly reduces the efficiency of the welding work and increases the production cycle. On the other hand, argon gas is a relatively expensive gas, and its large-scale use will significantly increase production costs. Therefore, a stainless steel pressure vessel welding back protection device is proposed. SUMMARY

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a stainless steel pressure vessel welding back protection device to solve the problems raised in the background art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a stainless steel pressure vessel welding back protection device, comprising two argon gas protection boxes arranged inside the stainless steel pressure vessel, a connecting mechanism arranged between the two argon gas protection boxes, the two argon gas protection boxes being connected by the connecting mechanism, the two argon gas protection boxes being supported and limited in the middle part of the argon gas protection box in cooperation with the connecting mechanism, an elastic skirt being fixedly connected to one side of the argon gas protection box, a visual device being fixedly connected to the middle part of the argon gas protection box, a gas inlet and a stud being fixedly connected to the side of the argon gas protection box away from the elastic skirt, the opening of the argon gas protection box being corresponded to the welding position through the elastic skirt, the gas inlet being connected to the gas supply pipe to input argon gas into the interior of the argon gas protection box, the welding being facilitated, the visual device being followed by the welding bright spot, the stud being connected to the connecting mechanism.

[0007] The top of the argon protection box is fixedly connected with a control box, the two sides of the argon protection box are fixedly connected with transmission boxes in a symmetrical manner, the two sides of the transmission boxes are provided with walking wheels in a symmetrical manner, one side of one of the transmission boxes is fixedly connected with a motor, and the output end of the motor is sleeved with two synchronous belts.

[0008] The connecting mechanism comprises a connecting pipe, one end of the connecting pipe is provided with a screw groove, the other end of the connecting pipe is provided with a plug rod, the two ends of the plug rod are fixedly connected with a limiting disc and a limiting ring respectively, one side of the limiting ring is fixedly connected with a screw head, and one side of the limiting disc is provided with a spring.

[0009] Preferably, the control box is electrically connected with the visual device and the motor, the inner cavity of the gas inlet is connected with the inner cavity of the argon protection box, the two motors are controlled to rotate simultaneously through the control box, the walking electric signal of the visual device can be received, the motor is started, the argon protection box is moved, and automatic identification and following are realized.

[0010] Preferably, the elastic skirt is attached to the stainless steel pressure container wall, the visual device corresponds to the welding point, and the walking wheel is attached to the stainless steel pressure container wall, so as to reduce the amount of argon used and avoid rapid diffusion of argon, thereby improving the use effect.

[0011] Preferably, one side of the walking wheel is fixedly connected with a rotating shaft, and one end of the synchronous belt away from the output end of the motor is sleeved on the rotating shaft, so as to conveniently control the synchronous rotation of the plurality of walking wheels.

[0012] Preferably, the stud and the screw head are the same, the stud is matched with the screw groove, and the limiting disc and the spring are arranged in the middle part of the connecting pipe.

[0013] Preferably, the diameter of the limiting ring is the same as that of the connecting pipe, one side of the limiting disc is provided with a sliding groove, and the middle part of the connecting pipe is fixedly connected with a sliding strip at a position corresponding to the sliding groove.

[0014] The technical effects and advantages of the utility model are as follows:

[0015] 1. The utility model discloses a first connecting mechanism is connected with two argon protection boxes, can be two argon protection boxes with the connecting mechanism cooperation, and the middle part of argon protection box is supported and limited, and the opening of argon protection box can be corresponded with the welding position through the elastic skirt, and the gas inlet is conveniently connected with the gas delivery pipe, so as to input argon into the inside of argon protection box, can effectively protect the back of the weld, can reduce the use amount of argon, improve the welding efficiency, and reduce the production cost.

[0016] 2. The utility model discloses still control box convenient control two motor rotation simultaneously, so as to drive multiple walking wheels rotation simultaneously through synchronous belt, convenient drive argon protection box removes, and can receive the walking electric signal that the identification removal information of visual device sends, so as to control motor start, can control argon protection box removes, realize the effect of automatic identification following, through the driving of spring to limit disc, can make argon protection box extrude stainless steel pressure vessel when using, improve the adhesion strength.

[0017] In summary, through the mutual influence of the above-mentioned multiple effects, the opening of the argon protection box can be corresponded with the welding position, and argon can be input into the inside of the argon protection box, which can effectively protect the back of the weld, reduce the use amount of argon, improve the welding efficiency, and reduce the production cost. At the same time, the argon protection box can be controlled to move automatically with the welding bright spot, improving the use effect. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the whole structure schematic diagram of the utility model.

[0019] Figure 2 It is the sectional structure schematic diagram of the utility model.

[0020] Figure 3 It is the sectional structure schematic diagram of the utility model Figure 1 It is the sectional structure schematic diagram of the utility model

[0021] Figure 4 It is the structure schematic diagram of the argon protection box of the utility model.

[0022] Figure 5 It is the sectional structure schematic diagram of the transmission box of the utility model.

[0023] The figure mark is: 1, argon protection box;2, gas inlet;3, control box;4, elastic skirt;5, transmission box;6, walking wheel;7, motor;8, visual device;9, stud;10, connecting pipe;11, screw groove;12, plug rod;13, limit disc;14, spring;15, limit ring;16, screw head;17, synchronous belt. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0025] As shown in the accompanying Figures 1-5 The device comprises two argon protection boxes 1 arranged inside the stainless steel pressure container, a connecting mechanism arranged between the two argon protection boxes 1, the two argon protection boxes 1 being connected through the connecting mechanism, the two argon protection boxes 1 being supported and limited in the middle of the argon protection box 1 in cooperation with the connecting mechanism, the argon protection box 1 being fixedly connected with an elastic skirt 4 at one side of the opening, the argon protection box 1 being fixedly connected with a visual device 8 in the middle, the argon protection box 1 being fixedly connected with a gas inlet 2 and a stud 9 at the side away from the elastic skirt 4, the opening of the argon protection box 1 corresponding to the welding position through the elastic skirt 4, the gas inlet 2 being connected with a gas supply pipe to input argon into the argon protection box 1, facilitating welding, the visual device 8 following the welding bright spot, the stud 9 being connected with the connecting mechanism.

[0026] The top of the argon protection box 1 is fixedly connected with a control box 3, the two sides of the argon protection box 1 are fixedly connected with a transmission box 5, the two sides of the transmission box 5 are symmetrically provided with walking wheels 6, one side of one of the transmission boxes 5 is fixedly connected with a motor 7, the output end of the motor 7 is sleeved with two synchronous belts 17, the connecting mechanism comprises a connecting pipe 10, the connecting pipe 10 is provided with a screw groove 11 at one end, the other end is provided with a plug rod 12, the two ends of the plug rod 12 are fixedly connected with a limiting disc 13 and a limiting ring 15 respectively, one side of the limiting ring 15 is fixedly connected with a screw head 16, one side of the limiting disc 13 is provided with a spring 14, the motor 7 is started to control the synchronous belt 17 to rotate, the walking wheels 6 are controlled to rotate synchronously, the argon protection box 1 is controlled to move, the argon protection box 1 is driven to use, the argon protection box 1 is extruded against the stainless steel pressure container through the spring 14 to push the limiting disc 13, the adhesion strength is improved, the length of the connecting mechanism is adjusted according to the diameter change of the stainless steel pressure container through the cooperation of the screw head 16 and the screw groove 11, and the adjustment is facilitated.

[0027] As shown in the accompanying Figure 1 , 2, 4, 5, the control box 3 is electrically connected with the visual device 8 and the motor 7, the inner cavity of the gas inlet 2 is communicated with the inner cavity of the argon protection box 1, the elastic skirt 4 is attached to the wall of the stainless steel pressure container, the visual device 8 corresponds to the welding point, the walking wheel 6 is attached to the wall of the stainless steel pressure container, one side of the walking wheel 6 is fixedly connected with a rotating shaft, one end of the synchronous belt 17 away from the output end of the motor 7 is sleeved on the rotating shaft, the two motors 7 are conveniently controlled to rotate simultaneously through the control box 3, and the walking electric signal of the identification moving information of the visual device 8 can be received, so that the motor 7 is started, the argon protection box 1 is controlled to move, the automatic identification and following effect are realized, the argon consumption is reduced, the rapid diffusion of argon is avoided, the use effect is improved, and the synchronous belt 17 is conveniently controlled to rotate synchronously with the rotating shaft.

[0028] As shown in the accompanying drawings Figure 2 、 3 The stud 9 is same as the screw head 16, the stud 9 is matched with the screw groove 11, the limiting disc 13 and the spring 14 are arranged in the middle part of the connecting pipe 10, the diameter of the limiting ring 15 is same as the diameter of the connecting pipe 10, the limiting disc 13 is provided with a sliding groove on one side, the middle part of the connecting pipe 10 is fixedly connected with a sliding strip at the position corresponding to the sliding groove, the sliding strip is located in the middle part of the sliding groove, the stud 9 and the screw head 16 are matched, the connecting pipe 10 is conveniently connected and used, a plurality of connecting pipes 10 can be combined for use according to the need, the movement distance of the inserting rod 12 is limited by the limiting ring 15, and the rotating between the inserting rod 12 and the connecting pipe 10 is avoided through the cooperation of the sliding strip and the sliding groove, and the use effect is improved.

[0029] The working principle of the utility model is as follows: when in use, the connecting mechanism is combined according to the diameter of the stainless steel pressure container, specifically, one end of the screw head 16 is inserted into the screw groove 11 in the connecting pipe 10, and is fixed through thread connection, and one end of the screw groove 11 in one of the connecting pipes 10 is connected with the stud 9, so that the fixed combination is realized.

[0030] The control box 3 is placed in the stainless steel pressure container, the argon protection box 1 corresponds to the girth weld, when welding, one of the visual devices 8 corresponds to the welding bright spot.

[0031] When the welding bright spot moves, the control box 3 is started, at this time, the visual device 8 identifies the movement of the welding bright spot and sends a walking electric signal, the control box 3 controls the motor 7 to drive, the walking wheel 6 moves, the visual device 8 follows the welding bright spot, so that the argon protection box 1 moves automatically.

[0032] While welding, argon is injected into the middle part of the argon protection box 1 through the gas inlet 2, which can effectively protect the back of the weld and reduce the use of argon, improve the welding efficiency and reduce the production cost.

[0033] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A welding back protection device for a stainless steel pressure vessel, comprising two argon gas protection boxes (1) disposed inside the stainless steel pressure vessel, characterized in that: A connecting mechanism is provided between the two argon gas protection boxes (1). An elastic skirt (4) is fixedly connected to one side opening of the argon gas protection box (1). A vision device (8) is fixedly connected to the middle of the argon gas protection box (1). An air inlet (2) and a stud (9) are fixedly connected to the side of the argon gas protection box (1) away from the elastic skirt (4). The top of the argon gas protection box (1) is fixedly connected to a control box (3), and the two sides of the argon gas protection box (1) are symmetrically fixedly connected to transmission boxes (5). The two sides of the transmission boxes (5) are symmetrically provided with walking wheels (6). One side of one of the transmission boxes (5) is fixedly connected to a motor (7), and the output end of the motor (7) is fitted with two synchronous belts (17). The connecting mechanism includes a connecting tube (10), one end of which is provided with a screw groove (11), and the other end is provided with a plug rod (12). The two ends of the plug rod (12) are respectively fixedly connected to a limiting plate (13) and a limiting ring (15). A screw head (16) is fixedly connected to one side of the limiting ring (15), and a spring (14) is provided on one side of the limiting plate (13).

2. The stainless steel pressure vessel welding back protection device according to claim 1, characterized in that: The control box (3) is electrically connected to the vision device (8) and the motor (7), and the inner cavity of the gas inlet (2) is connected to the inner cavity of the argon gas protection box (1).

3. The stainless steel pressure vessel welding back protection device according to claim 1, characterized in that: The elastic skirt (4) is attached to the stainless steel pressure vessel wall, the vision device (8) corresponds to the weld point, and the walking wheel (6) is attached to the stainless steel pressure vessel wall.

4. The stainless steel pressure vessel welding back protection device according to claim 1, characterized in that: One side of the walking wheel (6) is fixedly connected to the rotating shaft, and the end of the synchronous belt (17) away from the output end of the motor (7) is sleeved on the rotating shaft.

5. The stainless steel pressure vessel welding back protection device according to claim 1, characterized in that: The stud (9) and the screw head (16) are the same. The stud (9) is adapted to the screw groove (11). The limiting plate (13) and the spring (14) are both located in the middle of the connecting pipe (10).

6. The stainless steel pressure vessel welding back protection device according to claim 1, characterized in that: The diameter of the limiting ring (15) is the same as the diameter of the connecting pipe (10). A sliding groove is provided on one side of the limiting plate (13). A sliding strip is fixedly connected to the middle of the connecting pipe (10) at a position corresponding to the sliding groove. The sliding strip is located in the middle of the sliding groove.

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