Corrugated expansion joint welding equipment for tank body of petrochemical container

Abstract

The invention relates to the technical field of chemical container tank body bellow expansion joint welding, in particular to petrochemical container tank body bellow expansion joint welding equipment which comprises a non-contact welding head arranged on a rack and a controller tightly connected with the non-contact welding head, and further comprises an auxiliary welding device arranged on the rack, and the auxiliary welding device comprises a bearing seat and a bearing frame; the two groups of air expansion shafts are respectively arranged on a sliding seat of the bidirectional screw rod conveying mechanism positioned on the surface of the bearing frame, the non-contact welding head and the rotating gear are respectively arranged on the two groups of air expansion shafts, and the rotating gear and a driving gear of the bidirectional screw rod conveying mechanism are respectively driven by a trigger toothed bar arranged at the top of the rack. Therefore, the device is reasonable in structure, synchronous welding operation between the inner sleeve and the corrugated pipe and between the barrel and the corrugated pipe is achieved, the innovation remarkably improves the production efficiency and the welding quality, meanwhile, the production cost is greatly reduced, the labor intensity is relieved, and the excellent using effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding of corrugated expansion joints for chemical containers, and particularly to a welding device for corrugated expansion joints of petrochemical container bodies. Background Art

[0002] In the petrochemical industry, the corrugated expansion joints of container bodies, as key components for connecting and compensating the thermal expansion of pipelines or containers, are inseparable from the precise operation of welding equipment during the production process and installation.

[0003] Specifically, the corrugated expansion joint needs to undergo two key weldings: the first is during the production process, where the corrugated pipe is welded to the inner cylinder to form the main body of the expansion joint; the second is during the installation stage, where the corrugated pipe is welded to the cylinder to achieve overall connection.

[0004] However, the current welding equipment on the market does not support synchronous welding operations for these two steps. This forces the welding of the corrugated joint to the inner cylinder and the welding of the corrugated joint to the cylinder to be carried out separately in stages. This step-by-step operation mode not only significantly reduces work efficiency but also increases the physical burden on operators. More seriously, the welding process has extremely high precision requirements, and separate operations undoubtedly increase the risk of human error, further prolonging the production cycle, increasing production costs, and weakening the market competitiveness of products to a certain extent. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems in the related art to some extent.

[0006] To this end, the present invention aims to provide a welding device for corrugated expansion joints of petrochemical container bodies. The structure of the present invention is reasonable, realizing synchronous welding operations between the inner sleeve and the corrugated pipe, and between the cylinder and the corrugated pipe. This innovation significantly improves production efficiency and welding quality, while also greatly reducing production costs and labor intensity, demonstrating excellent use effects.

[0007] To achieve the above object, the present invention provides a welding device for corrugated expansion joints of petrochemical container bodies, including a non-contact welding head disposed on a frame, and a controller closely connected thereto. The device further includes an auxiliary welding device disposed on the frame. The auxiliary welding device includes:

[0008] A carrier seat and a carrier frame: both are vertically slidably connected in a preset groove at the top of the frame and are synchronously driven by a hydraulic lifting rod inside the frame;

[0009] Two sets of air shaft: They are respectively arranged on the sliding seats of the bidirectional screw conveyor mechanism located on the surface of the bearing frame, and are on the same axis as the centers of the cylinder body, bellows and inner sleeve arranged on the bearing seat in sequence. The non-contact welding head and the rotating gear are respectively arranged on the two sets of air shafts, and the rotating gear and the driving gear of the bidirectional screw conveyor mechanism are respectively driven by a trigger rack arranged on the top of the machine frame;

[0010] The hydraulic lifting rod and the bidirectional screw conveyor mechanism are respectively equipped with stroke sensors. The hydraulic lifting rod, the stroke sensor in the hydraulic lifting rod and the stroke sensor in the bidirectional screw conveyor mechanism are respectively connected to the controller through the bus system to realize data transmission and reception of control instructions.

[0011] In addition, a petrochemical container tank body corrugated expansion joint welding device proposed according to the above application may also have the following additional technical features:

[0012] Specifically, there are three sets of bearing seats. Arc-shaped parts are arranged on the tops of the three sets of bearing seats. The cylinder body, bellows and inner sleeve are respectively arranged on the arc-shaped parts, and their outer dimensions are adapted to each other. A general support frame is arranged on the top of the hydraulic lifting rod. The three sets of bearing seats and the two sets of bearing frames are respectively fixedly connected to the top of the general support frame and are slidably connected to the inner wall of the groove. The centers of the three arc-shaped parts are on the same axis as the centers of the two sets of air shafts. The lengths of the three grooves corresponding to the positions of the three sets of bearing seats respectively correspond to the lengths of the cylinder body, bellows and inner sleeve one by one.

[0013] Specifically, the air shaft further includes a flat key shaft rod, a flat key sleeve, a sliding limit block and an air pipe joint. The flat key shaft rod is rotatably connected to the inner wall of the sliding seat of the bidirectional screw conveyor mechanism. The flat key sleeve is sleeved on the outer side of one end of the flat key shaft rod and is slidably connected to the surface of the flat key shaft rod. One end of the flat key sleeve is rotatably connected to the surface of the sliding seat. The air shaft is arranged on the surface of the flat key sleeve. The non-contact welding head is arranged on the surface of the flat key sleeve and is located on one side of the air shaft. The sliding limit block is vertically slidably connected to the surface of the trigger rack and is rotatably connected to the other end of the flat key shaft rod. The rotating gear is fixedly connected to the surface of the other end of the flat key shaft rod and is located inside the sliding limit block. The rotating gear is meshed with the trigger rack. A one-way transmission is connected between the rotating gear and the flat key shaft rod. The air pipe joint is arranged on the sliding limit block. One end of the air pipe joint is connected to the air shaft through a conduit. The other end of the air pipe joint is connected to an external air source through an air pipe. An electromagnetic valve is arranged on the air pipe joint. The electromagnetic valve is connected to the controller through the bus system to realize data transmission and reception of control instructions.

[0014] Specifically, the lengths of the two sets of air shafts are different. The length of the air shaft corresponding to the position of the cylinder body is less than the length of the cylinder body, the length of the air shaft corresponding to the position of the inner sleeve is less than the length of the inner sleeve. The non-contact welding head corresponding to the position of the cylinder body is arranged inside the air shaft at the corresponding position, and the non-contact welding head corresponding to the position of the inner sleeve is arranged outside the air shaft at the corresponding position. The non-contact welding head corresponding to the position of the cylinder body points to the connection between the cylinder body and the corrugated pipe, and the non-contact welding head corresponding to the position of the inner sleeve points to the connection between the inner sleeve and the corrugated pipe.

[0015] Specifically, the trigger rack includes a U-shaped frame, the U-shaped frame is fixedly connected to the top of the frame, and the surface of the U-shaped frame is respectively provided with a first tooth portion, a second tooth portion and a vertical guide groove. Among them, the first tooth portion and the second tooth portion are arranged on the same side, the second tooth portion is higher than the first tooth portion, the first tooth portion and the second tooth portion are respectively located on one side of the driving gear and the rotating gear, the first tooth portion and the second tooth portion are respectively meshed and connected with the driving gear and the rotating gear, and the sliding limit block is vertically slidably connected to the inner wall of the vertical guide groove.

[0016] Specifically, the stroke sensor equipped with the hydraulic lifting rod is an infrared rangefinder. The stroke sensor equipped with the bidirectional screw conveying mechanism is composed of a sliding base, a first spring, a pressure sensor and a rail frame. The sliding base is vertically slidably connected to the inner wall of the mounting column at the bottom of the sliding seat, and a first spring is fixedly connected between the sliding base and the bottom of the mounting column. One end of the sliding base penetrates into the interior of the mounting column and is fixedly connected to the pressure sensor. The other end of the sliding base is located inside the rail frame embedded in the top of the frame and is slidably connected to the surface of the wavy guide seat arranged inside the rail frame.

[0017] Specifically, it further includes a limiting mechanism. The limiting mechanism includes a baffle plate. The baffle plate is vertically slidably connected to the surface of the bearing seat corresponding to the position of the corrugated pipe close to the cylinder body and is located in the groove. One end of the baffle plate penetrates out of the bottom of the general support frame, and a second spring is fixedly connected between the baffle plate and the top of the bottom plate arranged on the inner wall of the frame.

[0018] Specifically, the limiting mechanism further includes a pushing frame. The pushing frame is arranged on the surface of the one-way key sleeve corresponding to the position of the inner sleeve and is located outside the non-contact welding head. The outer diameter of the pushing frame is larger than the outer diameter of the corrugated pipe.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present invention.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. The structure of the present invention is reasonable, realizing the synchronous welding operation between the inner sleeve and the corrugated pipe, as well as between the cylinder body and the corrugated pipe. This innovation significantly improves the production efficiency and welding quality, while also greatly reducing the production cost and labor intensity, demonstrating excellent use effects.

[0022] 2. The present invention is provided with a bearing seat, a bearing frame, a groove and a hydraulic lifting rod. These components work together to quickly and accurately position the cylinder body, the corrugated pipe and the inner sleeve, ensuring their perfect coaxiality. Further, the present invention also introduces a bidirectional screw conveyor mechanism and an air shaft. The ingenious cooperation of these two components not only realizes the automatic fitting of the cylinder body and the corrugated pipe and the automatic socketing of the corrugated pipe and the inner sleeve, but also has the ability to drive the non-contact welding head to reach the precise position, greatly simplifying the operation process and improving the use efficiency and effect.

[0023] 3. The present invention is also provided with a rotating gear and a trigger rack. When the bidirectional screw conveyor mechanism moves upward, the trigger rack can sequentially activate the bidirectional screw conveyor mechanism and the rotating gear to make them operate in sequence. Once the non-contact welding head moves to the preset position, the rotating gear will drive the non-contact welding head to perform a comprehensive welding operation, which greatly improves the work efficiency and welding quality.

[0024] 4. The present invention is also equipped with a precise limiting mechanism, which can firmly fix the position of the corrugated pipe to ensure its accurate position, thereby further improving the welding accuracy and quality. This design not only enhances the practicability of the equipment, but also significantly improves the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and easy to understand from the following description of the embodiments in conjunction with the drawings, wherein:

[0026] Figure 1 is a schematic structural diagram of a welding device for a corrugated expansion joint of a petrochemical container tank body of the present invention;

[0027] Figure 2 is a schematic structural diagram of the bearing seat in a welding device for a corrugated expansion joint of a petrochemical container tank body of the present invention;

[0028] Figure 3 is a welding device for a corrugated expansion joint of a petrochemical container tank body of the present invention Figure 2 The enlarged structural schematic diagram at A in;

[0029] Figure 4 is a schematic structural diagram of the bidirectional screw conveyor mechanism in a welding device for a corrugated expansion joint of a petrochemical container tank body of the present invention;

[0030] Figure 5Schematic diagram of the air-expanding shaft structure in a welding device for the corrugated expansion joint of a petrochemical container tank body of the present invention;

[0031] Figure 6 Schematic diagram of the rotating gear structure in a welding device for the corrugated expansion joint of a petrochemical container tank body of the present invention;

[0032] Figure 7 Schematic diagram of the trigger tooth rod structure in a welding device for the corrugated expansion joint of a petrochemical container tank body of the present invention;

[0033] Figure 8 Schematic diagram of the stroke sensor structure in a welding device for the corrugated expansion joint of a petrochemical container tank body of the present invention.

[0034] As shown in the figure:

[0035] 1. Frame; 2. Non-contact welding head; 3. Controller; 4. Auxiliary welding device; 40. Bearing seat; 41. Bearing frame; 42. Groove; 43. Hydraulic lifting rod; 44. Air-expanding shaft; 45. Bi-directional screw conveying mechanism; 451. Slide; 100. Cylinder body; 200. Bellows; 300. Inner sleeve; 46. Rotating gear; 450. Driving gear; 47. Trigger tooth rod; 48. Stroke sensor; 400. Arc portion; 401. Total support frame;

[0036] 441. One-way key shaft rod; 442. One-way key sleeve; 443. Sliding limit block; 444. Air pipe joint; 471. U-shaped frame; 472. First tooth portion; 473. Second tooth portion; 474. Vertical guide groove; 481. Sliding base; 483. First spring; 484. Pressure sensor; 485. Rail frame; 482. Mounting column; 486. Wavy guide seat; 402. Baffle; 403. Bottom plate; 404. Second spring; 405. Pushing frame. Detailed implementation method

[0037] The embodiments of the present invention are described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention. On the contrary, the embodiments of the present invention include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.

[0038] A welding device for the corrugated expansion joint of a petrochemical container tank body according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0039] As Figures 1 - 8As shown in the figure, a welding device for a corrugated expansion joint of a petrochemical container tank body according to an embodiment of the present invention includes a non-contact welding head 2 provided on a frame 1 and a controller 3 closely connected thereto. It further includes an auxiliary welding device 4 provided on the frame 1. The auxiliary welding device 4 includes:

[0040] A bearing seat 40 and a bearing frame 41: Both are vertically slidably connected in a preset groove 42 at the top of the frame 1 and are synchronously driven by a hydraulic lifting rod 43 inside the frame 1;

[0041] Two sets of air shafts 44: They are respectively arranged on the sliding seats 451 of a bidirectional screw conveyor mechanism 45 on the surface of the bearing frame 41 and are on the same axis as the centers of the cylinder 100, the corrugated pipe 200, and the inner sleeve 300 arranged on the bearing seat 40 in sequence. The non-contact welding head 2 and the rotating gear 46 are respectively arranged on the two sets of air shafts 44, and the rotating gear 46 and the driving gear 450 of the bidirectional screw conveyor mechanism 45 are respectively driven by a trigger rack 47 provided on the top of the frame 1;

[0042] The hydraulic lifting rod 43 and the bidirectional screw conveyor mechanism 45 are respectively equipped with stroke sensors 48. The stroke sensors 48 in the hydraulic lifting rod 43, the hydraulic lifting rod 43, and the bidirectional screw conveyor mechanism 45 are respectively connected to the controller 3 through a bus system to realize data transmission and receipt of control instructions.

[0043] Specifically, the frame 1 serves as the support foundation of the entire device, firmly carrying all other components. The non-contact welding head 2 is ingeniously installed on the frame 1. Using non-contact welding technology, it ensures the efficiency and precision of the welding process. The controller 3, as the "brain" of the device, is responsible for receiving and processing data from various sensors and issuing control instructions according to the preset program to ensure the smooth progress of the entire welding process. The auxiliary welding device 4 is the core part of the present invention. It mainly includes a carrier seat 40, a carrier frame 41, an air shaft 44, a two-way lead screw conveying mechanism 45, a rotating gear 46, a trigger rack 47, and a stroke sensor 48. Among them, both the carrier seat 40 and the carrier frame 41 can achieve vertical lifting in the preset groove 42 at the top of the frame 1 and are synchronously driven by the hydraulic lifting rod 43 inside the frame 1. This design not only improves the flexibility of the device but also ensures the stability and accuracy during the welding process. The carrier seat 40 is used to carry the cylinder 100, the bellows 200, and the inner sleeve 300. By cooperating with the groove 42, it forms a natural installation opening, ensuring the position accuracy and stability during the welding process. The carrier frame 41 is used to carry and support the two-way lead screw conveying mechanism 45, enabling it to move upward under the drive of the hydraulic lifting rod 43. Two groups of air shafts 44 are respectively arranged on the sliding seats 451 of the two-way lead screw conveying mechanism 45 on the surface of the carrier frame 41. They are on the same axis as the centers of the cylinder 100, the bellows 200, and the inner sleeve 300, ensuring the coaxiality requirements during the welding process and facilitating subsequent connection. The rotating gear 46 is arranged on the air shaft 44 and drives the non-contact welding head 2 to perform the welding operation comprehensively by connecting with the trigger rack 47. The two-way lead screw conveying mechanism 45 is connected with the trigger rack 47 through its drive gear 450, realizing the precise conveying and positioning of the welding components. The hydraulic lifting rod 43 and the two-way lead screw conveying mechanism 45 are both equipped with stroke sensors 48. These sensors can monitor the operating state of the device in real time and transmit the data to the controller 3 to ensure the precise control of the welding process. Data transmission and control instruction reception between the hydraulic lifting rod 43, the stroke sensor 48, and the controller 3 are achieved through the bus system, ensuring the efficient operation and precise control of the entire device.

[0044] During use, first, the cylinder body 100, the corrugated pipe 200, and the inner sleeve 300 are precisely placed in the groove 42 on the bearing seat 40. The ingenious cooperation between the bearing seat 40 and the groove 42 ensures that the bottoms of these components are accurately limited, and they are on the same axis as the center of the air-expanding shaft 44, thus ensuring a high degree of accuracy in position. Subsequently, the hydraulic lifting rod 43 receives an instruction and starts to operate. This action drives the bearing seat 40, the bearing frame 41, the air-expanding shaft 44, the bidirectional screw conveyor mechanism 45, and the rotating gear 46 to rise synchronously. During the rising process, the driving gear 450 in the bidirectional screw conveyor mechanism 45 comes into contact with the trigger rack 47 and is activated. This activation process causes the two sets of sliding seats 451 to move inward synchronously, thereby driving the two sets of air-expanding shafts 44 to extend into the interiors of the cylinder body 100 and the inner sleeve 300 respectively. When the air-expanding shafts 44 are completely inside the cylinder body 100 and the inner sleeve 300, they are passively triggered, thereby strongly supporting and magnetically fixing the inner walls of the cylinder body 100 and the inner sleeve 300. This triggering timing is precisely provided by the travel sensor 48 on the bidirectional screw conveyor mechanism 45. As the bidirectional screw conveyor mechanism 45 continues to operate, the inner sleeve 300 is accurately sent into the interior of the corrugated pipe 200 until it reaches the preset welding position, and at the same time, one end of the cylinder body 100 is closely abutted against the corrugated pipe 200. At this time, the two non-contact welding heads 2 respectively accurately correspond to the connection between the cylinder body 100 and the corrugated pipe 200 and the connection between the corrugated pipe 200 and the inner sleeve 300. When the bidirectional screw conveyor mechanism 45 continues to rise and the driving gear 450 separates from the trigger rack 47, the positions of the cylinder body 100, the corrugated pipe 200, the inner sleeve 300, the air-expanding shaft 44, and the non-contact welding heads 2 remain unchanged, ensuring the accuracy of the butt joint. Subsequently, the rotating gear 46 comes into contact with the trigger rack 47 and is activated, synchronously driving the non-contact welding heads 2 to rotate, thereby realizing a comprehensive welding operation. The welding timing of the non-contact welding heads 2 is precisely controlled by the travel sensor 48 on the hydraulic lifting rod 43.

[0045] In summary, through the ingenious structural design and advanced control technology of the present invention, the synchronous welding operation between the inner sleeve 100 and the corrugated pipe 200 and between the cylinder body 300 and the corrugated pipe 200 is realized, which not only significantly improves the production efficiency and welding quality, but also greatly reduces the production cost and lightens the labor intensity. This innovative device will undoubtedly bring a revolutionary change to the manufacturing of petrochemical container tank bodies.

[0046] In an embodiment of the present invention, as Figure 2As shown in the figure, there are three sets of bearing seats 40, and arc-shaped parts 400 are provided at the tops of the three sets of bearing seats 40. The cylinder body 100, the corrugated pipe 200, and the inner sleeve 300 are respectively arranged on the arc-shaped parts 400, and their outer dimensions are adapted to each other. A general support frame 401 is provided at the top of the hydraulic lifting rod 43. The three sets of bearing seats 40 and the two sets of bearing frames 41 are respectively fixedly connected to the top of the general support frame 401 and are slidably connected to the inner wall of the groove 42. The centers of the three arc-shaped parts 400 and the centers of the two air-expansion shafts 44 are on the same axis line. The lengths of the three grooves 42 corresponding to the positions of the three sets of bearing seats 40 respectively correspond to the lengths of the cylinder body 100, the corrugated pipe 200, and the inner sleeve 300 one by one.

[0047] Specifically, further explain the structure, position, and connection relationship of the bearing seat 40. The lengths and diameters of the cylinder body 100, the corrugated pipe 200, and the inner sleeve 300 match the design of the arc-shaped part 400 to ensure that they can be stably and tightly installed on the bearing seat 40. By the telescopic movement of the hydraulic lifting rod 43, the height of the general support frame 401 and the bearing seat 40 can be adjusted, so as to realize the synchronous lifting operation of the cylinder body 100, the corrugated pipe 200, and the inner sleeve 300, and ensure the stability of the axis line. The centers of the two air-expansion shafts 44 and the centers of the three arc-shaped parts 400 are on the same axis line, which can further ensure their stability and accuracy during the working process, and is also convenient for the operation of the air-expansion shaft 44, with good use effect.

[0048] In an embodiment of the present invention, as Figures 5 - 6 shown, the air-expansion shaft 44 further includes a one-key shaft rod 441, a one-key sleeve 442, a sliding limit block 443, and a tracheal joint 444. The one-key shaft rod 441 is rotatably connected to the inner wall of the sliding seat 451 of the bidirectional screw conveyor mechanism 45. The one-key sleeve 442 is sleeved on the outer side of one end of the one-key shaft rod 441 and is slidably connected to the surface of the one-key shaft rod 441. One end of the one-key sleeve 442 is rotatably connected to the surface of the sliding seat 451. The air-expansion shaft 44 is arranged on the surface of the one-key sleeve 442. The non-contact welding head 2 is arranged on the surface of the one-key sleeve 442 and is located on one side of the air-expansion shaft 44. The sliding limit block 443 is vertically slidably connected to the surface of the trigger tooth rod 47 and is rotatably connected to the other end of the one-key shaft rod 441. The rotating gear 46 is fixedly connected to the surface of the other end of the one-key shaft rod 441 and is located inside the sliding limit block 443. The rotating gear 46 is meshed with the trigger tooth rod 47. A one-way transmission is connected between the rotating gear 46 and the one-key shaft rod 441. The tracheal joint 444 is arranged on the sliding limit block 443. One end of the tracheal joint 444 is connected to the air-expansion shaft 44 through a guide pipe, and the other end of the tracheal joint 444 is connected to an external air source through a trachea. An electromagnetic valve is arranged on the tracheal joint 444. The electromagnetic valve is connected to the controller 3 through a bus system to realize data transmission and receive control instructions.

[0049] It should be noted that the air duct described in this embodiment is not shown in the figure.

[0050] It should also be noted that an electromagnetic lock (not shown in the figure) is ingeniously installed on the air shaft 44 described in this embodiment and is rotationally connected to the one-key sleeve 442. During the welding operation, this design ensures that only the non-contact welding head 2 rotates synchronously with the rotation of the one-key sleeve 442. At the same time, the air shaft 44 is tightly magnetically fixed to the inner wall of the inner sleeve 300 or the inner wall of the cylinder 100 through the electromagnetic lock, so as to remain stable and will not move with the rotation of the one-key sleeve 442. The triggering timing of the electromagnetic lock is precisely set to be automatically activated when the pressure sensor 484 monitors a specific pressure value. This intelligent design not only simplifies the operation process but also significantly improves the operation efficiency and accuracy. Under the action of the electromagnetic lock, the air shaft 44 can firmly fix the components to be welded, providing a stable welding platform for the non-contact welding head 2, thereby ensuring excellent and consistent welding quality. This optimized solution not only enhances the stability and reliability of the equipment but also improves the precision and efficiency of the welding operation through intelligent control, bringing a better user experience. Among them, it can be understood that after the air shaft 44 is tightly magnetically fixed to the inner wall of the inner sleeve 300 or the inner wall of the cylinder 100 through the electromagnetic lock, the inner sleeve 300 or the cylinder 100 will not rotate.

[0051] It should be noted that the one-way transmission described in this embodiment is not shown in the figure, and the one-way transmission is a ratchet-type one-way transmission.

[0052] Specifically, to further explain the structure and connection relationship of the air shaft 44, we designed a combination of the one-key shaft rod 441 and the one-key sleeve 442, so that the non-contact welding head 2 can easily achieve lateral movement and smoothly enter the inner sleeve 300 or the cylinder 100 for welding operations. At the same time, the design of the sliding limit block 443 enables it to move smoothly along the surface of the trigger rack 47 and forms an effective limit on the one-key shaft rod 441, ensuring the stability of the overall structure and the precision of the operation. In addition, the introduction of the air pipe joint 444 greatly facilitates the connection between the external air pipe and the air shaft 44, enabling the air shaft 44 to be ventilated and operate smoothly. The entire operation process is simple and fast, and the use effect is remarkable.

[0053] In practical applications, the movement of the sliding seat 451 will synchronously drive the movement of the cross key sleeve 442, the air shaft 44, and the non-contact welding head 2 as a whole. During the movement, the cross key sleeve 442 will smoothly slide along the surface of the cross key shaft rod 441, ensuring that the air shaft 44 can enter the inner sleeve 300 or the inside of the cylinder body 100 for welding operations and that the non-contact welding head 2 can be accurately positioned at the welding position. When the bidirectional lead screw conveying mechanism 45 rises, the sliding limit block 443 will continue to move along the surface of the trigger rack 47 until the rotating gear 46 meshes with the trigger rack 47 and starts to rotate passively. At this time, the cross key shaft rod 441 will rotate synchronously, driving the cross key sleeve 442 and the non-contact welding head 2 to rotate together, thereby performing precise welding operations on the connection. This design not only improves the efficiency and accuracy of the welding operation but also realizes the automation and intelligence of the entire operation process through the ingenious cooperation of various components, bringing more convenience and efficiency to users. Before welding, the electromagnetic lock on the air shaft 44 will automatically operate and magnetically fix to the inner wall of the inner sleeve 300 or the cylinder body 100 to ensure that it does not rotate.

[0054] In one embodiment of the present invention, as Figure 4 shown, the lengths of the two groups of air shafts 44 are different. The length of the air shaft 44 corresponding to the cylinder body 100 is less than the length of the cylinder body 100, and the length of the air shaft 44 corresponding to the inner sleeve 300 is less than the length of the inner sleeve 300. The non-contact welding head 2 corresponding to the cylinder body 100 is arranged inside the air shaft 44 at the corresponding position, and the non-contact welding head 2 corresponding to the inner sleeve 300 is arranged outside the air shaft 44 at the corresponding position. The non-contact welding head 2 corresponding to the cylinder body 100 points to the connection between the cylinder body 100 and the corrugated pipe 200, and the non-contact welding head 2 corresponding to the inner sleeve 300 points to the connection between the inner sleeve 300 and the corrugated pipe 200.

[0055] Specifically, the length of the air shaft 44 and the installation position of the non-contact welding head 2 are further defined to ensure its precise, stable, and efficient operation.

[0056] The present invention is equipped with two sets of air shafts 44 with different lengths to adapt to cylinders 100 and inner sleeves 300 with different lengths. Specifically, for the air shaft 44 corresponding to the cylinder 100, its length is designed to be slightly shorter than the length of the cylinder 100 to ensure that during the welding process, the air shaft 44 can stably support the cylinder 100 without interfering with the welding operation. The non-contact welding head 2 is cleverly arranged inside the air shaft 44 at the corresponding position and precisely pointed at the connection between the cylinder 100 and the corrugated pipe 200 to ensure the accuracy and efficiency of welding. For the air shaft 44 corresponding to the inner sleeve 300, its length is also slightly shorter than the length of the inner sleeve 300 to provide stable support. At this time, the non-contact welding head 2 is located outside the air shaft 44 at the corresponding position and precisely pointed at the connection between the inner sleeve 300 and the corrugated pipe 200, thus ensuring that the welding between these two components is also precise and efficient. This design not only optimizes the spatial layout, improves the welding accuracy and efficiency, but also ensures the stability and reliability of the entire welding process. By precisely controlling the position and direction of the non-contact welding head 2, we can effectively achieve high-quality welding between the cylinder 100, the inner sleeve 300 and the corrugated pipe 200.

[0057] In an embodiment of the present invention, as Figure 7 shown, the trigger rack 47 includes a U-shaped frame 471, and the U-shaped frame 471 is fixedly connected to the top of the frame 1. The surface of the U-shaped frame 471 is respectively provided with a first tooth part 472, a second tooth part 473 and a vertical guide groove 474. Among them, the first tooth part 472 and the second tooth part 473 are arranged on the same side, the second tooth part 473 is higher than the first tooth part 472, the first tooth part 472 and the second tooth part 473 are respectively located on one side of the driving gear 450 and the rotating gear 46, and the first tooth part 472 and the second tooth part 473 are respectively meshed and connected with the driving gear 450 and the rotating gear 46. The sliding limit block 443 is vertically slidably connected to the inner wall of the vertical guide groove 474.

[0058] Specifically, the structure and connection relationship of the trigger rack 47 will be further described. In order to precisely control the rotation of the drive gear 450 and the rotating gear 46, we specifically set the first tooth part 472 and the second tooth part 473. These two tooth parts are respectively meshed with the drive gear 450 and the rotating gear 46 to achieve the transmission of the rotational movement. In order to ensure the sequential execution of the actions, we ingeniously designed the height of the second tooth part 473 to be higher than that of the first tooth part 472, so that they can drive the corresponding gears in the preset program sequence. In addition, in order to prevent the accidental rotation of the non-contact welding head 2 during the non-operating state (such as when falling), we added a one-way transmission device. This device can ensure that the rotating gear 46 and the non-contact welding head 2 can be driven to rotate only in a specific rotation direction, thus effectively avoiding the occurrence of misoperations. At the same time, in order to enhance the stability and guiding property of the sliding limit block 443, we set up a vertical guide groove 474. This guide groove not only provides an accurate moving path for the sliding limit block 443, but also ensures its stability and accuracy during the movement. Under the guidance of the vertical guide groove 474, the sliding limit block 443 can smoothly move on the preset path, thus achieving the precise control of the entire mechanism. By optimizing the design of the first tooth part 472 and the second tooth part 473, adding a one-way transmission device, and setting up the vertical guide groove 474, we improved the control accuracy and stability of the entire mechanism, ensuring that the non-contact welding head 2 can perform precise rotational operations according to the preset program.

[0059] In an embodiment of the present invention, as Figure 2 and Figure 8 shown, the travel sensor 48 equipped on the hydraulic lift rod 43 is an infrared rangefinder. The travel sensor 48 equipped on the bidirectional lead screw conveying mechanism 45 is composed of a sliding base 481, a first spring 483, a pressure sensor 484, and a rail frame 485. The sliding base 481 is vertically slidably connected to the inner wall of the mounting post 482 at the bottom of the slide base 451, and a first spring 483 is fixedly connected between the sliding base 481 and the bottom of the mounting post 482. One end of the sliding base 481 penetrates into the interior of the mounting post 482 and is fixedly connected to the pressure sensor 484. The other end of the sliding base 481 is located inside the rail frame 485 embedded in the top of the frame 1 and is slidably connected to the surface of the wavy guide seat 486 provided inside the rail frame 485.

[0060] Specifically, the structure and connection relationship of the travel sensor 48 are further explained. The travel sensor 48 equipped with the hydraulic lifting rod 43 uses a high-precision infrared rangefinder, which focuses on the accurate measurement of the lifting height, perfectly meets the use requirements, and ensures the accuracy of the lifting action. For the bidirectional screw conveying mechanism 45, its travel sensor 48 adopts a more complex structural design, which is composed of a sliding base 481, a mounting column 482, a first spring 483, a pressure sensor 484 and a rail frame 485. The sliding base 481 moves smoothly along the surface of the wavy guide seat 486 in the rail frame 485. The special shape of the wavy guide seat 486 guides one end of the sliding base 481 to enter the interior of the mounting column 482, while compressing the first spring 483 and triggering the pressure sensor 484. By monitoring the real-time changes in the pressure value, the system can accurately determine the triggering timing of the non-contact welding head 2. The operation is simple and the effect is excellent.

[0061] In one embodiment of the present invention, Figures 1 - 3 As shown, it also includes a limiting mechanism, which includes a baffle 402, which is vertically slidably connected to a side surface of a bearing seat 40 corresponding to the position of the bellows 200 and close to the cylinder 100, and is located in the groove 42. One end of the baffle 402 passes through the bottom of the main support frame 401, and is fixedly connected to the top of a bottom plate 403 arranged on the inner wall of the frame 1 by a second spring 404.

[0062] Specifically, the structure and connection relationship of the limiting mechanism are further described. The design of the limiting mechanism cleverly prevents the inner sleeve 300 from causing the corrugated tube 200 to move when it is inserted into the inner sleeve 300 .

[0063] Specifically, by installing the baffle 402 to limit the other end of the bellows 200, the position stability of the bellows 200 during the welding process is ensured. When the supporting seat 40 moves upward, the baffle 402 will gradually separate from the bellows 200. This design not only ensures the stable positioning of the bellows 200 before welding, but also does not affect the subsequent smooth connection between the cylinder 100 and the bellows 200. The entire operation process is simple and efficient, which not only improves the position accuracy of the bellows 200, but also significantly improves the welding quality, and the use effect is excellent.

[0064] In one embodiment of the present invention, Figure 5 As shown, the limiting mechanism also includes a push frame 405, which is arranged on the surface of the straight key sleeve 442 corresponding to the position of the inner sleeve 300 and located outside the non-contact welding head 2. The outer diameter of the push frame 405 is larger than the outer diameter of the corrugated tube 200.

[0065] Specifically, the structure and connection relationship of the limiting mechanism will be further described. The limiting mechanism precisely limits the inner sleeve 300 through the pushing frame 405 to ensure the tight connection between the cylinder body 100 and the inner sleeve 300, reduce the gap, and improve the welding quality and accuracy. During operation, the movement of the one-way key sleeve 442 will synchronously drive the movement of the pushing frame 405 until the cylinder body 100 is completely in contact with the inner sleeve 300. At this time, the pushing frame 405 will also be in close contact with the other end of the inner sleeve 300 to achieve stable limiting.

[0066] In summary, for a welding device for the corrugated expansion joint of a petrochemical container tank body according to an embodiment of the present invention, the structure of the present invention is reasonable, and the synchronous welding operations between the inner sleeve 300 and the bellows 200, and between the cylinder body 100 and the bellows 200 are realized. This innovation significantly improves the production efficiency and welding quality, and at the same time greatly reduces the production cost and labor intensity, showing excellent use effects.

[0067] In the description of this specification, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0068] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0069] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A welding device for a corrugated expansion joint of a petrochemical container tank body, comprising a non-contact welding head (2) arranged on a frame (1) and a controller (3) closely connected thereto, characterized in that, It further includes an auxiliary welding device (4) arranged on the frame (1), and the auxiliary welding device (4) includes: A bearing seat (40) and a bearing frame (41): The two are respectively vertically slidably connected in a preset groove (42) at the top of the frame (1), and are synchronously driven by a hydraulic lifting rod (43) inside the frame (1); Two groups of air shaft (44): They are respectively arranged on the sliding seats (451) of a two-way lead screw conveying mechanism (45) on the surface of the bearing frame (41), and are on the same axis as the centers of the cylinder body (100), the bellows (200), and the inner sleeve (300) arranged on the bearing seat (40) in sequence. The non-contact welding head (2) and the rotating gear (46) are respectively arranged on the two groups of air shafts (44), and the rotating gear (46) and the driving gear (450) of the two-way lead screw conveying mechanism (45) are respectively driven by a trigger rack (47) arranged on the top of the frame (1); The hydraulic lifting rod (43) and the two-way lead screw conveying mechanism (45) are respectively equipped with stroke sensors (48), and the stroke sensors (48) in the hydraulic lifting rod (43), the hydraulic lifting rod (43), and the two-way lead screw conveying mechanism (45) are respectively connected to the controller (3) through a bus system to achieve data transmission and receipt of control instructions.

2. The petrochemical container tank body corrugated expansion joint welding equipment according to claim 1, characterized in that, There are three groups of the bearing seats (40), and arc-shaped parts (400) are arranged on the tops of the three groups of the bearing seats (40). The cylinder body (100), the bellows (200), and the inner sleeve (300) are respectively arranged on the arc-shaped parts (400), and their outer dimensions are adapted. A general support frame (401) is arranged at the top of the hydraulic lifting rod (43). The three groups of the bearing seats (40) and the two groups of the bearing frames (41) are respectively fixedly connected to the top of the general support frame (401) and are slidably connected to the inner wall of the groove (42). The centers of the three groups of the arc-shaped parts (400) are on the same axis as the centers of the two groups of air shafts (44). The lengths of the three grooves (42) corresponding to the three groups of the bearing seats (40) respectively correspond one by one to the lengths of the cylinder body (100), the bellows (200), and the inner sleeve (300).

3. The petrochemical container tank body corrugated expansion joint welding equipment according to claim 1, characterized in that, The air shaft (44) further includes a flat key shaft rod (441), a flat key sleeve (442), a sliding limit block (443) and a tracheal joint (444). The flat key shaft rod (441) is rotatably connected to the inner wall of the sliding seat (451) of the bidirectional lead screw conveying mechanism (45). The flat key sleeve (442) is sleeved on the outer side of one end of the flat key shaft rod (441) and is slidably connected to the surface of the flat key shaft rod (441). One end of the flat key sleeve (442) is rotatably connected to the surface of the sliding seat (451). The air shaft (44) is arranged on the surface of the flat key sleeve (442). The non-contact welding head (2) is arranged on the surface of the flat key sleeve (442) and is located on one side of the air shaft (44). The sliding limit block (443) is vertically slidably connected to the surface of the trigger rack (47) and is rotatably connected to the other end of the flat key shaft rod (441). The rotating gear (46) is fixedly connected to the surface of the other end of the flat key shaft rod (441) and is located inside the sliding limit block (443). The rotating gear (46) is meshed with the trigger rack (47). A one-way transmission is connected between the rotating gear (46) and the flat key shaft rod (441). The tracheal joint (444) is arranged on the sliding limit block (443). One end of the tracheal joint (444) is connected to the air shaft (44) through a conduit. The other end of the tracheal joint (444) is connected to an external air source through a trachea. An electromagnetic valve is arranged on the tracheal joint (444). The electromagnetic valve is connected to the controller (3) through a bus system to realize data transmission and reception of control instructions.

4. The petrochemical container tank body corrugated expansion joint welding equipment according to claim 1, characterized in that, The lengths of the two groups of air shafts (44) are different. The length of the air shaft (44) corresponding to the position of the cylinder body (100) is less than the length of the cylinder body (100). The length of the air shaft (44) corresponding to the position of the inner sleeve (300) is less than the length of the inner sleeve (300). The non-contact welding head (2) corresponding to the position of the cylinder body (100) is arranged inside the air shaft (44) at the corresponding position. The non-contact welding head (2) corresponding to the position of the inner sleeve (300) is arranged outside the air shaft (44) at the corresponding position. The non-contact welding head (2) corresponding to the position of the cylinder body (100) points to the connection between the cylinder body (100) and the corrugated pipe (200). The non-contact welding head (2) corresponding to the position of the inner sleeve (300) points to the connection between the inner sleeve (300) and the corrugated pipe (200).

5. The petrochemical container tank body corrugated expansion joint welding equipment according to claim 3, characterized in that, The trigger rack (47) includes a U-shaped frame (471) fixedly connected to the top of the machine frame (1). The surface of the U-shaped frame (471) is respectively provided with a first tooth portion (472), a second tooth portion (473) and a vertical guide groove (474). Among them, the first tooth portion (472) and the second tooth portion (473) are arranged on the same side, the second tooth portion (473) is higher than the first tooth portion (472), the first tooth portion (472) and the second tooth portion (473) are respectively located on one side of the driving gear (450) and the rotating gear (46), the first tooth portion (472) and the second tooth portion (473) are respectively meshed and connected with the driving gear (450) and the rotating gear (46), and the sliding limit block (443) is vertically slidably connected to the inner wall of the vertical guide groove (474).

6. The petrochemical container tank body corrugated expansion joint welding equipment according to claim 1, characterized in that, The travel sensor (48) equipped on the hydraulic lifting rod (43) is an infrared rangefinder. The travel sensor (48) equipped on the bidirectional lead screw conveying mechanism (45) is composed of a sliding base (481), a first spring (483), a pressure sensor (484) and a rail frame (485). The sliding base (481) is vertically slidably connected to the inner wall of the mounting post (482) at the bottom of the sliding seat (451), and a first spring (483) is fixedly connected between the sliding base (481) and the bottom of the mounting post (482). One end of the sliding base (481) penetrates into the interior of the mounting post (482) and is fixedly connected to the pressure sensor (484). The other end of the sliding base (481) is located inside the rail frame (485) embedded in the top of the machine frame (1) and is slidably connected to the surface of the wavy guide seat (486) arranged inside the rail frame (485).

7. The petrochemical container tank corrugated expansion joint welding equipment according to claim 1, characterized in that, It further includes a limiting mechanism. The limiting mechanism includes a baffle (402) vertically slidably connected to the surface of the bearing seat (40) corresponding to the position of the bellows (200) and close to the cylinder body (100) and located in the groove (42). One end of the baffle (402) penetrates out of the bottom of the main support frame (401) and is fixedly connected to a second spring (404) between the top of the bottom plate (403) arranged on the inner wall of the machine frame (1).

8. The petrochemical container tank corrugated expansion joint welding equipment according to claim 7, characterized in that, The limiting mechanism further includes a push frame (405) arranged on the surface of the one-key sleeve (442) corresponding to the position of the inner sleeve (300) and located outside the non-contact welding head (2). The outer diameter of the push frame (405) is larger than the outer diameter of the bellows (200).

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