A natural gas tank internal welding device

Abstract

The application discloses a natural gas tank internal welding device and relates to the technical field of tank body processing. The device comprises a welding base and a welding gun body. When the device is used for welding a natural gas tank, a driving motor is used in cooperation with a screw rod to drive a moving support and the welding gun body to move, so that automatic welding of multiple groups of reinforcing rings is realized in the rotation of the tank body. When the device is moved to a welding position, an electric push rod and a sliding rod drive a connecting rod to slide, so that three groups of lifting rods and supporting rollers are spread outward to press the inner surface of the reinforcing ring to stabilize the position of the reinforcing ring. In the lifting rod ascending process, the fixed side plate of the supporting base makes the side clamping block at the top of the sliding rod contact the inner wall of the tank body and position and calibrate the reinforcing ring in the radial direction in cooperation with the guide rod and the inclined groove, then the tank body can be driven to rotate by the roller frame, and the welding position is pre-scraped and cleaned by the side clamping block, so that false welding is avoided, the uniformity of the welding seam is ensured, and the welding efficiency and quality are comprehensively improved.

Description

Technical Field

[0001] This invention relates to the field of tank processing technology, specifically to a welding device for the inside of a natural gas tank. Background Technology

[0002] Natural gas tanks are containers used to store natural gas. They are generally large in size. Some natural gas tanks are used stationary, while others are installed on natural gas transport vehicles. In addition to being airtight, natural gas tanks also need to meet the requirements of sufficient strength and pressure resistance. For tanks with larger diameters, their rigidity is lower and they are more susceptible to compression and plastic deformation. Therefore, multiple sets of reinforcing rings are installed inside the natural gas tank to maintain the strength of the cylinder. Generally, the reinforcing rings are ring-shaped metal structures that are welded to the inner wall of the natural gas tank.

[0003] Currently, when welding the reinforcing ring inside a natural gas tank, it is necessary to first mark the position inside the tank, then move the reinforcing ring to the marked position for preliminary pre-fixation by electric welding. Subsequently, the connection between the reinforcing ring and the natural gas tank body on both sides is welded and fixed manually. However, due to the large size of the natural gas tank, the tank body needs to be placed on a roller frame to rotate during the welding process to facilitate welding. The overall welding work is labor-intensive, resulting in low welding efficiency. Furthermore, since the reinforcing ring is only initially positioned and spot-welded inside the tank, the rotation of the tank can cause unstable vibrations in the reinforcing ring, leading to incomplete welding or other welding defects at the actual welding position, making it difficult to guarantee the welding quality of the natural gas tank. Summary of the Invention

[0004] The purpose of this invention is to provide a welding device for the inside of a natural gas tank to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a welding device for the inside of a natural gas tank, comprising a welding base and a welding gun body, wherein three sets of roller frames are installed on the top of the welding base, and a tank body is arranged above the welding base via the roller frames, and multiple sets of reinforcing rings are provided on the inner wall of the tank body;

[0006] The tank body is provided with an insertion welding component, which includes a fixed rod located in the middle of the tank body. The fixed rod moves back and forth to drive two welding guns to weld and fix the connection between the side walls of the reinforcing ring and the tank body.

[0007] The outer wall of the fixed rod is provided with a diffusion support component, which includes three support bases, so as to use the synchronous diffusion movement of the three support bases to press and fix the reinforcing ring during the rotation welding process;

[0008] The side wall of the support base is provided with a side clamp cleaning component, which includes a sliding rod to calibrate the radial position of the reinforcing ring before welding by sliding the sliding rod laterally.

[0009] Preferably, the extending welding component includes a movable bracket, a drive motor is fixedly installed on one outer wall of the movable bracket, and a screw is rotatably connected to the other side wall of the movable bracket. One end of the output shaft of the drive motor passes through the interior of the movable bracket and is fixedly connected to one end of the screw. The outer wall of the screw is threadedly connected to the interior of the welding base. A support rod is symmetrically fixedly connected to one side of the movable bracket. A support groove is opened through the interior of the welding base corresponding to the support rod. The outer wall of the support rod slides against the inner wall of the support groove.

[0010] Preferably, a fixing rod is fixedly connected to one side of the top of the movable bracket, and a support ring is symmetrically fixedly connected to the outer wall of the other end of the fixing rod. The tops of the two welding gun bodies are respectively hinged to the bottoms of the two support rings, and the two welding gun bodies are arranged with their corresponding reinforcing rings inclined to each other.

[0011] Preferably, the diffusion support component includes a sliding rod, and the outer wall of the sliding rod slides against the inner wall of the fixed rod. An electric push rod is fixedly installed on the outer wall of the top side of the movable bracket, and a through groove is opened on the top side of the movable bracket corresponding to the sliding rod. One end of the electric push rod is output and fixedly connected to one end of the sliding rod through the inside of the through groove. A support shell is fixedly connected to the outer wall of the end of the fixed rod away from the movable bracket at equal circumferences, and a lifting rod is slidably connected to the inner wall of the support shell. A connecting rod is hinged to the outer wall of the end of the sliding rod away from the movable bracket at equal circumferences, and the other end of the connecting rod is hinged to the bottom of the lifting rod. A sliding groove is opened on the outer wall of the end of the fixed rod away from the movable bracket at equal circumferences, and the side wall of the connecting rod slides against the inner wall of the sliding groove.

[0012] Preferably, the bottom of the support base is fixedly connected to the top of the lifting rod, and the inner wall of the support base is rotatably connected to the supporting roller corresponding to the reinforcing ring.

[0013] Preferably, the outer walls of both sides of the support shell are provided with limiting grooves, and the outer walls of both sides of the lifting rod are fixedly connected with limiting blocks corresponding to the limiting grooves, and the outer walls of the limiting blocks slide in contact with the inner walls of the limiting grooves.

[0014] Preferably, the side clamp cleaning component includes two fixed side plates, which are respectively fixedly connected to the outer walls of the two sides of the support base. The bottom inner wall of the sliding rod is slidably connected to the outer walls of the two sides of the fixed side plates. A guide rod is fixedly connected to the bottom of the sliding rod. Inclined grooves are symmetrically opened on the outer walls of the two sides of the fixed side plates corresponding to the guide rods, and the outer wall of the guide rod slides in contact with the inner wall of the inclined groove. A side clamping block is fixedly connected to the top of the sliding rod.

[0015] Preferably, a return spring is fixedly connected to the inner wall of the inclined groove, and the other end of the return spring is fixedly connected to one side of the outer wall of the guide rod.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. When welding natural gas tanks, the drive motor and screw work together to move the moving bracket, which in turn moves the two welding guns inside the tank in conjunction with the fixed rod. This allows for automatic welding and fixing of the connection points between the two side walls of multiple reinforcing rings and the tank body during the tank's rotation, achieving automatic welding capability and avoiding manual segmented welding. This helps ensure the welding efficiency of the device for natural gas tanks.

[0018] 2. When welding natural gas tanks, the device can move to a welding position and, through the cooperation of an electric push rod and a sliding rod, drive multiple connecting rods to slide, causing three sets of lifting rods to spread outwards. This, in turn, drives three sets of support rollers to spread outwards until they synchronously press against the inner surface of the current reinforcing ring. This ensures the accuracy of the reinforcing ring's position during the rotation welding of the gas tank, avoids incomplete welding or other welding defects, and thus helps improve the welding quality of natural gas tanks using this device.

[0019] 3. During the welding of natural gas tanks, the fixed side plates installed on both sides of the support base can be used during the ascent of the lifting rod to pre-contact the side clamps at the top of the sliding rod with the inner wall of the tank near the reinforcing ring before the support roller presses against the inner surface of the reinforcing ring. With the cooperation of the guide rod and the inclined groove, the position of the reinforcing ring can be pre-positioned and calibrated from both sides before the support roller contacts the reinforcing ring, avoiding radial offset before the support roller contacts the reinforcing ring, thereby further ensuring the welding quality of the natural gas tank by this device.

[0020] Furthermore, after the side clamping block contacts and positions the reinforcing ring, the tank can be rotated at a certain angle using the roller frame. This allows the side clamping block to pre-scrape and clean the connection points between the reinforcing ring's two side walls and the tank, preventing the presence of welding slag or dust at the welding points and thus helping to ensure the uniformity of the subsequent welds. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of the tank body of the present invention;

[0023] Figure 3 This is a schematic diagram illustrating the kinematic relationship between the movable support and the fixed rod of the present invention.

[0024] Figure 4 This is a structural schematic diagram of the connection position between the slide rod and the electric push rod of the present invention;

[0025] Figure 5 This is a schematic diagram of the connection relationship between the sliding rod and the lifting rod of the present invention;

[0026] Figure 6 This is a schematic diagram showing the connection between the guide rod and the inclined groove of the present invention.

[0027] In the diagram: 1. Welding base; 2. Roller frame; 3. Tank body; 4. Reinforcing ring; 5. Welding component; 501. Moving bracket; 502. Drive motor; 503. Screw; 504. Support rod; 505. Support groove; 506. Fixing rod; 507. Support ring; 508. Welding gun body; 6. Diffusion support component; 601. Sliding rod; 602. Electric push rod; 603. Through groove; 604. Support shell; 605. Lifting rod; 606. Connecting rod; 607. Sliding groove; 608. Support base; 609. Support roller; 610. Limiting groove; 611. Limiting block; 7. Side clamp cleaning component; 701. Fixed side plate; 702. Sliding rod; 703. Guide rod; 704. Inclined groove; 705. Side clamp block; 706. Return spring. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1, please refer to Figures 1-6 The present invention provides a technical solution: a welding device for the inside of a natural gas tank, including a welding base 1 and a welding gun body 508. Three sets of roller frames 2 are installed on the top of the welding base 1, and a tank body 3 is arranged above the welding base 1 through the roller frames 2. The inner wall of the tank body 3 is provided with multiple sets of reinforcing rings 4.

[0030] The tank body 3 is equipped with an insert welding component 5;

[0031] Furthermore, the welding component 5 includes a movable bracket 501. A drive motor 502 is fixedly installed on one outer wall of the movable bracket 501, and a screw 503 is rotatably connected to the other side wall of the movable bracket 501. One end of the output shaft of the drive motor 502 passes through the interior of the movable bracket 501 and is fixedly connected to one end of the screw 503. The outer wall of the screw 503 is threadedly connected to the interior of the welding base 1. A support rod 504 is symmetrically fixedly connected to one side of the movable bracket 501. A support groove 505 is opened inside the welding base 1 corresponding to the support rod 504. The outer wall of the support rod 504 slides against the inner wall of the support groove 505.

[0032] More specifically, in this embodiment, when the welding device is used, the natural gas tank is first laid flat on the surface of the multiple sets of roller frames 2 located above the welding base 1, so that it can be rotated by the roller frames 2 during welding. Then, a drive motor 502 is fixedly installed on one side of the outer wall of the movable bracket 501, and a screw 503 is rotatably connected to the other side of the movable bracket 501. One end of the output shaft of the drive motor 502 passes through the inside of the movable bracket 501 and is fixedly connected to one end of the screw 503. The outer wall of the screw 503 is threadedly connected to the inside of the welding base 1. A support rod 504 is symmetrically fixedly connected to one side of the movable bracket 501. A support groove 505 is opened through the inside of the welding base 1 corresponding to the support rod 504. The outer wall of the support rod 504 slides against the inner wall of the support groove 505, so that the screw 503 can be rotated by the drive motor 502. At the same time, the support rod 504 and the support groove 505 restrict and support the movable bracket 501 to move under the rotation of the screw 503.

[0033] Next, a fixed rod 506 is fixedly connected to one side of the top of the movable support 501, and a support ring 507 is symmetrically fixedly connected to the outer wall of the other end of the fixed rod 506. The tops of the two welding gun bodies 508 are respectively hinged to the bottoms of the two support rings 507, and the two welding gun bodies 508 are inclined to each other in relation to the reinforcing ring 4. Thus, when the movable support 501 moves, it can be driven by the fixed rod 506 to extend into the interior from one end of the tank body 3, and the two welding gun bodies 508, which are inclined to each other, can sequentially weld and fix the connection positions of the two side walls of the reinforcing ring 4 to the tank body 3. This enables automatic welding of the connection positions of multiple sets of reinforcing ring 4 side walls to the tank body 3 during the rotation of the tank body 3, achieving automatic welding capability and avoiding manual segmented welding, thereby helping to ensure the welding efficiency of the device for natural gas tanks.

[0034] In embodiment two, based on the above embodiment, a diffusion support component 6 is provided on the outer wall of the fixing rod 506;

[0035] Furthermore, the diffusion support component 6 includes a slide rod 601, and the outer wall of the slide rod 601 slides against the inner wall of the fixed rod 506. An electric push rod 602 is fixedly installed on the outer wall of the top side of the movable bracket 501, and a through groove 603 is opened on the top side of the movable bracket 501 corresponding to the slide rod 601. One end of the electric push rod 602 passes through the inside of the through groove 603 and is fixedly connected to one end of the slide rod 601. The outer wall of the fixed rod 506 away from the movable bracket 501 is equidistant. A support shell 604 is fixedly connected to the circumference, and a lifting rod 605 is slidably connected to the inner wall of the support shell 604. A connecting rod 606 is hinged to the outer wall of the end of the sliding rod 601 away from the moving bracket 501 at equal circumferential distances. The other end of the connecting rod 606 is hinged to the bottom of the lifting rod 605. A sliding groove 607 is opened through the outer wall of the end of the fixed rod 506 away from the moving bracket 501 at equal circumferential distances. The side wall of the connecting rod 606 is in contact with the inner wall of the sliding groove 607 and slides.

[0036] More specifically, in the embodiment, when welding the natural gas tank, multiple lifting rods 605 are in a retracted state when the tank is moved to a welding position, which facilitates movement within the tank body 3. Then, the outer wall of the sliding rod 601 slides against the inner wall of the fixed rod 506. An electric push rod 602 is fixedly installed on the outer wall of the top side of the moving bracket 501, and a through groove 603 is opened on the top side of the moving bracket 501 corresponding to the sliding rod 601. One end of the electric push rod 602 is output rod and fixedly connected to one end of the sliding rod 601 through the inside of the through groove 603, so that the sliding rod 601 can be moved to one side by the electric push rod 602.

[0037] At this time, a support shell 604 is fixedly connected to the outer wall of the end of the fixed rod 506 away from the movable bracket 501 at equal circumferential distances. A lifting rod 605 is slidably connected to the inner wall of the support shell 604. A connecting rod 606 is hinged to the outer wall of the end of the sliding rod 601 away from the movable bracket 501 at equal circumferential distances. The other end of the connecting rod 606 is hinged to the bottom of the lifting rod 605. A sliding groove 607 is formed through the outer wall of the end of the fixed rod 506 away from the movable bracket 501 at equal circumferential distances. The side wall of the connecting rod 606 slides against the inner wall of the sliding groove 607. The bottom of the support base 608... The support base 608 is fixedly connected to the top of the lifting rod 605. The inner wall of the support base 608 is rotatably connected to the reinforcing ring 4. This allows the sliding rod 601 to drive multiple connecting rods 606 to move synchronously, thereby causing the three sets of lifting rods 605 to spread outward. This, in turn, causes the three sets of support rollers 609 located at the top of the three sets of lifting rods 605 to spread outward until they synchronously press against the inner surface of the current reinforcing ring 4. This ensures the accuracy of the position of the reinforcing ring 4 when the gas tank is rotated and welded, avoids incomplete welding such as false welding, and helps to improve the welding quality of the natural gas tank by this device.

[0038] Next, limit grooves 610 are opened through the outer walls of both sides of the support shell 604. Limit blocks 611 are fixedly connected to the outer walls of both sides of the lifting rod 605 corresponding to the limit grooves 610. The outer wall of the limit block 611 slides against the inner wall of the limit groove 610, so that the stability of the lifting rod 605 during the lifting process can be ensured through the sliding cooperation between the limit groove 610 and the limit block 611.

[0039] In embodiment three, based on the above embodiments, a side clamping cleaning component 7 is provided on the side wall of the support base 608;

[0040] Furthermore, the side clamp cleaning component 7 includes two fixed side plates 701, which are respectively fixedly connected to the outer walls of the two sides of the support base 608. The bottom inner wall of the sliding rod 702 is slidably connected to the outer walls of the two sides of the fixed side plates 701. A guide rod 703 is fixedly connected to the bottom of the sliding rod 702. Inclined grooves 704 are symmetrically opened on the outer walls of the fixed side plates 701 corresponding to the guide rods 703. The outer wall of the guide rod 703 slides in contact with the inner wall of the inclined groove 704. A side clamping block 705 is fixedly connected to the top of the sliding rod 702.

[0041] More specifically, in this embodiment, during the welding of the natural gas tank, as the lifting rod 605 rises, two fixed side plates 701 are respectively fixedly connected to the outer walls of the support base 608 on both sides. The bottom inner wall of the sliding rod 702 is slidably connected to the outer walls of the fixed side plates 701 on both sides. A guide rod 703 is fixedly connected to the bottom of the sliding rod 702. Inclined grooves 704 are symmetrically opened on the outer walls of the fixed side plates 701 corresponding to the guide rods 703, and the outer wall of the guide rod 703 slides in contact with the inner wall of the inclined grooves 704. A side clamping block 705 is fixedly connected to the top of the sliding rod 702, thereby... By using the fixed side plates 701 installed on both sides of the support base 608, before the support roller 609 presses against the inner surface of the reinforcing ring 4, the side clamping block 705 at the top of the sliding rod 702 is brought into contact with the inner wall of the tank 3 located near the reinforcing ring 4. Thus, with the cooperation of the guide rod 703 and the inclined groove 704, the radial offset position of the reinforcing ring 4 is pre-positioned and calibrated from both sides by multiple sets of side clamping blocks 705 before the support roller 609 contacts the reinforcing ring 4, avoiding radial offset before the support roller 609 contacts the reinforcing ring 4, thereby further ensuring the welding quality of the natural gas tank by this device.

[0042] Furthermore, after the side clamping block 705 contacts and positions the reinforcing ring 4, the roller frame 2 can be used to drive the tank body 3 to rotate at a certain angle. By using the pressing and squeezing setting of the side clamping block 705, the connection position between the two side walls of the reinforcing ring 4 and the tank body 3 can be scraped and cleaned in advance to avoid the presence of welding slag or dust at the welding position, thereby helping to ensure the uniformity of the subsequent weld.

[0043] Next, a return spring 706 is fixedly connected to the inner wall of the inclined groove 704. The other end of the return spring 706 is fixedly connected to the outer wall of one side of the guide rod 703. Thus, when the current reinforcing ring 4 is welded and the next reinforcing ring 4 is replaced, the return spring force of the return spring 706 can be used to drive the two side clamps 705 back to their original positions when the lifting rod 605 descends.

[0044] Working principle: When using this welding device, the natural gas tank is first laid flat on the surface of the multiple sets of roller frames 2 located above the welding base 1, so that it can be rotated by the roller frames 2 during welding. Then, the drive motor 502 drives the screw 503 to rotate. At the same time, the support rod 504 and the support groove 505 restrict and support the screw 503 to drive the moving bracket 501 to move.

[0045] Next, a fixed rod 506 is fixedly connected to one side of the top of the movable support 501, and a support ring 507 is symmetrically fixedly connected to the outer wall of the other end of the fixed rod 506. The tops of the two welding gun bodies 508 are respectively hinged to the bottoms of the two support rings 507, and the two welding gun bodies 508 are inclined to each other in relation to the reinforcing ring 4. Thus, when the movable support 501 moves, it can be driven by the fixed rod 506 to extend into the interior from one end of the tank body 3, and the two welding gun bodies 508, which are inclined to each other, can sequentially weld and fix the connection positions of the two sides of the reinforcing ring 4 to the tank body 3. This enables automatic welding of the connection positions of multiple sets of reinforcing ring 4 sides to the tank body 3 during the rotation of the tank body 3, achieving automatic welding capability and avoiding manual segmented welding, thereby helping to ensure the welding efficiency of the device for natural gas tanks.

[0046] Next, when welding the natural gas tank, multiple lifting rods 605 are in a retracted state when the tank is moved to a welding position, which facilitates movement within the tank body 3. Then, the outer wall of the sliding rod 601 slides against the inner wall of the fixed rod 506. An electric push rod 602 is fixedly installed on the outer wall of the top side of the moving bracket 501, and a through groove 603 is opened on the top side of the moving bracket 501 corresponding to the sliding rod 601. One end of the electric push rod 602 is output rod and fixedly connected to one end of the sliding rod 601 through the inside of the through groove 603, so that the sliding rod 601 can be moved to one side by the electric push rod 602.

[0047] At this time, a support shell 604 is fixedly connected to the outer wall of the end of the fixed rod 506 away from the movable bracket 501 at equal circumferential distances. A lifting rod 605 is slidably connected to the inner wall of the support shell 604. A connecting rod 606 is hinged to the outer wall of the end of the sliding rod 601 away from the movable bracket 501 at equal circumferential distances. The other end of the connecting rod 606 is hinged to the bottom of the lifting rod 605. A sliding groove 607 is formed through the outer wall of the end of the fixed rod 506 away from the movable bracket 501 at equal circumferential distances. The side wall of the connecting rod 606 slides against the inner wall of the sliding groove 607. The bottom of the support base 608... The support base 608 is fixedly connected to the top of the lifting rod 605. The inner wall of the support base 608 is rotatably connected to the reinforcing ring 4. This allows the sliding rod 601 to drive multiple connecting rods 606 to move synchronously, thereby causing the three sets of lifting rods 605 to spread outward. This, in turn, causes the three sets of support rollers 609 located at the top of the three sets of lifting rods 605 to spread outward until they synchronously press against the inner surface of the current reinforcing ring 4. This ensures the accuracy of the position of the reinforcing ring 4 when the gas tank is rotated and welded, avoids incomplete welding such as false welding, and helps to improve the welding quality of the natural gas tank by this device.

[0048] Next, limit grooves 610 are opened through the outer walls of both sides of the support shell 604. Limit blocks 611 are fixedly connected to the outer walls of both sides of the lifting rod 605 corresponding to the limit grooves 610. The outer wall of the limit block 611 slides against the inner wall of the limit groove 610. Thus, the stability of the lifting rod 605 during the lifting process can be ensured through the sliding cooperation between the limit groove 610 and the limit block 611.

[0049] Next, during the welding of the natural gas tank, as the lifting rod 605 rises, it is fixedly connected to the outer walls of the support base 608 on both sides via two fixed side plates 701. The bottom inner wall of the sliding rod 702 is slidably connected to the outer walls of the fixed side plates 701 on both sides. A guide rod 703 is fixedly connected to the bottom of the sliding rod 702. Inclined grooves 704 are symmetrically opened on the outer walls of the fixed side plates 701 corresponding to the guide rods 703, and the outer wall of the guide rod 703 slides in contact with the inner wall of the inclined grooves 704. A side clamping block 705 is fixedly connected to the top of the sliding rod 702, thereby utilizing the support base... The fixed side plates 701 installed on both sides of 608 are used to pre-contact the side clamps 705 at the top of the sliding rod 702 with the inner wall of the tank 3 located near the reinforcing ring 4 before the support roller 609 presses against the inner surface of the reinforcing ring 4. With the cooperation of the guide rod 703 and the inclined groove 704, the radial offset position of the reinforcing ring 4 is pre-positioned and calibrated from both sides by multiple sets of side clamps 705 before the support roller 609 contacts the reinforcing ring 4, so as to avoid radial offset before the support roller 609 contacts the reinforcing ring 4, thereby further ensuring the welding quality of the natural gas tank by this device.

[0050] Furthermore, after the side clamping block 705 contacts and is positioned and calibrated with the reinforcing ring 4, the roller frame 2 can be used to drive the tank body 3 to rotate at a certain angle. By using the contact and pressing setting of the side clamping block 705, the connection position between the two side walls of the reinforcing ring 4 and the tank body 3 can be scraped and cleaned in advance to avoid the presence of welding slag or dust at the welding position. This helps to ensure the uniformity of the subsequent weld. At the same time, when the current reinforcing ring 4 is welded and the next reinforcing ring 4 is changed, the return spring force of the return spring 706 can be used to drive the two side clamping blocks 705 back to their original positions when the lifting rod 605 descends.

[0051] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding device for the interior of a natural gas tank, comprising a welding base (1) and a welding torch (508), characterized in that: The welding base (1) is equipped with three sets of roller frames (2) on its top. A tank (3) is set above the welding base (1) through the roller frames (2), and the inner wall of the tank (3) is provided with multiple sets of reinforcing rings (4). The tank body (3) is provided with an insertion welding component (5). The insertion welding component (5) includes a fixing rod (506) located in the middle of the tank body (3). By moving the fixing rod (506) back and forth, two welding gun bodies (508) are driven to weld and fix the connection position between the two side walls of the reinforcing ring (4) and the tank body (3). The insertion welding component (5) includes a movable bracket (501). A drive motor (502) is fixedly installed on one side of the outer wall of the movable bracket (501), and a screw (503) is rotatably connected to the other side wall of the movable bracket (501). One end of the output shaft of the drive motor (502) passes through the inside of the movable bracket (501) and is fixedly connected to one end of the screw (503). The outer wall of the screw (503) is threadedly connected to the inside of the welding base (1). A support rod (504) is symmetrically fixedly connected to one side of the movable bracket (501). A support groove (505) is opened through the inside of the welding base (1) corresponding to the support rod (504). The outer wall of the support rod (504) slides against the inner wall of the support groove (505). A fixed rod (506) is fixedly connected to one side of the top of the movable bracket (501), and a support ring (507) is symmetrically fixedly connected to the outer wall of the other end of the fixed rod (506). The tops of the two welding gun bodies (508) are respectively hinged to the bottoms of the two support rings (507), and the two welding gun bodies (508) are inclined to each other in relation to the reinforcing ring (4). The outer wall of the fixed rod (506) is provided with a diffusion support component (6), which includes three support bases (608). The reinforcing ring (4) is pressed and fixed during the rotation welding process by the synchronous diffusion movement of the three support bases (608). The diffusion support component (6) includes a slide rod (601), and the outer wall of the slide rod (601) slides against the inner wall of the fixed rod (506). An electric push rod (602) is fixedly installed on the outer wall of the top side of the movable bracket (501), and a through groove (603) is opened on the top side of the movable bracket (501) corresponding to the slide rod (601). One end of the electric push rod (602) is fixedly connected to one end of the slide rod (601) through the inside of the through groove (603). The outer wall of the end of the fixed rod (506) away from the movable bracket (501) is equidistant. A support shell (604) is fixedly connected to the circumference, and a lifting rod (605) is slidably connected to the inner wall of the support shell (604). A connecting rod (606) is hinged to the outer wall of the end of the sliding rod (601) away from the moving bracket (501) at equal circumferences. The other end of the connecting rod (606) is hinged to the bottom of the lifting rod (605). A sliding groove (607) is opened through the outer wall of the end of the fixed rod (506) away from the moving bracket (501) at equal circumferences. The side wall of the connecting rod (606) slides against the inner wall of the sliding groove (607). The bottom of the support base (608) is fixedly connected to the top of the lifting rod (605), and the inner wall of the support base (608) is rotatably connected to the support roller (609) corresponding to the reinforcing ring (4). The side wall of the support base (608) is provided with a side clamp cleaning component (7), which includes a sliding rod (702) to calibrate the radial position of the reinforcing ring (4) before welding by sliding the sliding rod (702) laterally. The side clamp cleaning component (7) includes two fixed side plates (701), which are respectively fixedly connected to the outer walls of the two sides of the support base (608). The bottom inner wall of the sliding rod (702) is slidably connected to the outer walls of the two sides of the fixed side plate (701). A guide rod (703) is fixedly connected to the bottom of the sliding rod (702). The outer walls of the two sides of the fixed side plate (701) are symmetrically provided with inclined grooves (704) corresponding to the guide rods (703). The outer wall of the guide rod (703) slides against the inner wall of the inclined groove (704). A side clamping block (705) is fixedly connected to the top of the sliding rod (702). A return spring (706) is fixedly connected to the inner wall of the inclined groove (704), and the other end of the return spring (706) is fixedly connected to the outer wall of one side of the guide rod (703).

2. The welding device for the interior of a natural gas tank according to claim 1, characterized in that, Limiting grooves (610) are provided through the outer walls of both sides of the support shell (604). Limiting blocks (611) are fixedly connected to the outer walls of both sides of the lifting rod (605) corresponding to the limiting grooves (610), and the outer wall of the limiting block (611) slides in contact with the inner wall of the limiting groove (610).

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