An auxiliary device suitable for pipe body welding

Abstract

The application discloses a kind of auxiliary devices suitable for pipe body welding, it is related to welding auxiliary tool technical field, the device utilizes four inner side wall and is equipped with telescopic rod-shaped clamping body pipe body clamping positioning in turn auxiliary welding is carried out;Telescopic rod-shaped clamping body's clamping jaw end is equipped with wheel body;Pipe body is slidably positioned on the bottom guide rail, it is arranged in row, two two a group, respectively clamping positioning two pipe bodies needing welding;Two pipe bodies are arranged between two pipe bodies close to middle part, and two pressure sensors for detecting the extrusion force received from the two pipe bodies are arranged;After welding, two annular capsules positioned in the inner side wall of one of the pipe bodies are inflated to enclose a closed space near the weld;Whether the welding is qualified is determined by observing the pressure change in the closed space;The process is convenient and efficient when pipe body butt welding, the butt quality and the finished product stability are good, and the process is simple and efficient to verify the welding effect.

Description

Technical Field

[0001] This invention relates to the field of welding auxiliary tools, and in particular to an auxiliary device suitable for pipe welding. Background Technology

[0002] In the steelmaking process, oxygen is blown into the molten steel through pipes to assist the oxidation reaction, thereby removing impurities from the steel and obtaining higher quality molten steel. There are two types of pipes used for oxygen blowing: consumable and non-consumable. Consumable oxygen blowing pipes wear out quickly during use and need to be extended by welding after wear to continue to be used.

[0003] In existing technologies, when welding oxygen blowing pipes, it is generally necessary to first place the pipe body on the ground or, for example... Figure 2 On the V-shaped frame shown, multiple people work together to bring the ends of the two oxygen blowing pipes together and align them before spot welding. Then, while rotating the combined pipe body (which is a pipe body composed of two oxygen blowing pipes), the combined pipe body is welded. After welding, one end of the combined pipe body is sealed, and gas is injected from the other end to check for leaks by observing the gas venting from the weld.

[0004] While the above solution can weld the two oxygen blasting pipes together, it requires the cooperation of multiple people, is cumbersome and labor-intensive, and the process of verifying the welding effect is also cumbersome and time-consuming.

[0005] Furthermore, because the oxygen blowing pipe (hereinafter referred to as "pipe body") is relatively long, it generally needs to be transported horizontally. Prolonged horizontal transport can easily lead to bending and deformation of the pipe body. Moreover, the operating environment of these pipe bodies is relatively harsh, and the influence of high temperature (uneven heating and cooling caused by high temperature baking) can also cause or aggravate the bending and deformation of the pipe body. This means that when the oxygen blowing pipe is extended, the two pipe bodies that need to be joined may not be straight. When welding two uneven pipe bodies, it is difficult to align the ends of the two pipe bodies when they are placed on the ground or behind a V-shaped frame (the ends of the joint are prone to misalignment). It may even be necessary to have two other people hold one pipe body each to adjust it during welding, which is not only time-consuming but also cannot guarantee the quality of the welded product, resulting in poor product stability. Due to the bending of the pipe body, it is also difficult to smoothly flip (rotate) the pipe body after spot welding to continue welding. Once the two pipe bodies are misaligned, the inner wall of the combined pipe body will also be relatively uneven, which will encounter greater resistance and generate greater noise when high-pressure gas passes through, seriously affecting normal use.

[0006] Therefore, there is a need for an auxiliary device suitable for pipe welding that is easy to use, can assist in the efficient connection of bent pipes (so that the oxygen blowing pipe welding process does not require multiple people to cooperate), can effectively ensure the quality of the welded product, and can quickly detect the welding effect. Summary of the Invention

[0007] This application provides an auxiliary device suitable for pipe welding, which solves the technical problems in the prior art of pipe butt welding, such as the need for multiple people to work together, cumbersome process, time and labor consumption, difficulty in guaranteeing the butt welding effect, poor stability of the welded product, and cumbersome and complicated process of verifying the welding effect. It achieves the technical effects of convenient and efficient process of pipe butt welding, good butt welding quality and product stability, and simple and efficient process of verifying the welding effect.

[0008] This application provides an auxiliary device suitable for pipe welding, including a bottom guide rail positioned on the ground, a first pipe head positioning component, a second pipe head positioning component, two pipe tail positioning components, and a pipe detection component;

[0009] The main body of the first pipe head positioning component, the second pipe head positioning component, and the pipe tail positioning component are all tubular carriers with telescopic rod-shaped clamps on their inner sidewalls. They are all slidably positioned on the bottom guide rail, arranged in pairs side by side, with each pair used to clamp and position one pipe body. The first pipe head positioning component and the second pipe head positioning component are located in the middle. The claws of the telescopic rod-shaped clamps are equipped with wheels.

[0010] The tube detection component is located between the first tube head positioning component and the second tube head positioning component. Its core structure consists of two pressure sensors that are controlled to rise and fall. In use, they are respectively placed against the bottom of the two tubes near the tube head, and the measured pressure is used to feed back the attitude of the two tubes.

[0011] Before welding, multiple telescopic rod-shaped clamps are used to adjust the posture of the two tubes based on the values ​​measured by the pressure sensor.

[0012] The first tube head positioning assembly includes a tubular sliding block and two controlled-expansion and contraction annular elastic bladders positioned on the inner wall of the tubular sliding block. When the welding effect needs to be tested, a closed space is formed by the elastic bladders, the inner wall of the tubular sliding block and the outer wall of the welded combined tube. The quality of the weld is determined by injecting air into the space and monitoring the air pressure change.

[0013] Furthermore, the first pipe head positioning assembly includes a tubular sliding block, a telescopic clamping body, a pipe sealing assembly, a pressure sensor, and a pumping assembly;

[0014] The tubular sliding block is a horizontally placed rigid tube that slides along the bottom guide rail;

[0015] The telescopic clamping body consists of three telescopic rods with wheels at the ends.

[0016] The telescopic clamping body includes a base rod for telescopic rods and a rod head wheel; at least one rod head wheel is controlled to rotate.

[0017] The tube sealing assembly is connected to the air pump assembly, and there are two of them. They are used to cover the combined tube body and thus assist in verifying the welding effect of the combined tube body.

[0018] The pressure sensor is positioned on the inner wall of the tubular sliding block and is located between the two tube-sealed components;

[0019] The air pump assembly has an air outlet on the inner wall of the tubular sliding block, which is located between the two tube-sealed assemblies.

[0020] Furthermore, there are two tube closure assemblies, both fixed on the inner wall of the tubular sliding block, and located on both sides of the telescopic clamping body respectively;

[0021] The tube sealing assembly includes a base carrier ring and an inflatable sealing bladder;

[0022] The base carrier ring is a rigid ring with a rectangular cross-section, and the outer ring is fixed to the inner wall of the tubular sliding block;

[0023] The inflatable sealed bladder is coaxial with the base carrier ring and is either an annular bladder fixed on the inner ring of the base carrier ring or a sheet with its edges fixed on the base carrier ring. It is made of elastic rubber, is connected to the air pump assembly, and expands and contracts in a controlled manner.

[0024] Furthermore, the second pipe head positioning assembly includes a support block and an abutment positioning body;

[0025] The support block is a horizontally placed rigid tube, coaxial with the tubular sliding block, and moves in a controlled manner.

[0026] The structure and layout of the contact positioning body are the same as those of the telescopic clamping body.

[0027] Furthermore, there are two tube tail positioning components, both positioned on the bottom guide rail and respectively located near both ends of the bottom guide rail;

[0028] The tube tail positioning assembly includes a tubular carrier, a telescopic rod, an abutment wheel, and a connecting compression spring;

[0029] The tubular carrier is coaxial with the tubular sliding block;

[0030] The telescopic rods are controlled to extend and retract, and there are three of them, which are positioned on the tubular carrier.

[0031] The length direction of the abutment wheel is the same as that of the bottom guide rail, and it is positioned on the U-shaped rigid bracket, corresponding one-to-one with the telescopic rod.

[0032] The connecting compression spring is coaxial with the telescopic rod, with one end positioned at the end of the telescopic rod and the other end positioned on the rigid bracket that supports the abutment wheel.

[0033] Furthermore, the tube detection assembly includes a support frame, a telescopic support rod, a positioning crossbar, a buffer pad, and a contact rolling element;

[0034] The support frame is fixed to the end of the tubular sliding block near the second tube head positioning assembly;

[0035] The telescopic support rod is vertically arranged and can be extended and retracted in a controlled manner. Its bottom is fixed to the top of the support frame, and its axis is perpendicular to the axis of the tubular sliding block.

[0036] The positioning crossbar is set horizontally, with its length direction being the same as the axial direction of the tubular sliding block, and its bottom center position is fixed to the top of the telescopic carrier bar;

[0037] The number of buffer pads is two, which are elastic rubber pads, each with a built-in pressure sensor for measuring the pressure it receives, and they are respectively positioned at the top of the positioning crossbar near both ends;

[0038] The abutting rolling element is a bullseye ball bearing, with the ball bearing facing upwards, and there are two of them, each positioned on top of one of the two buffer pads.

[0039] Preferably, the tubular sliding block, the supporting block, and the tubular carrier are all composed of two arc-shaped plates hinged together; the base ring is composed of two semi-rings; the semi-rings are arc-shaped bent rods; the inflatable sealed bladder is composed of two bent rod-shaped bladders positioned on the two semi-rings; the tubular sliding block, the supporting block, and the tubular carrier undergo controlled deformation in a timely manner to expose openings for the insertion and removal of the tubular body.

[0040] Preferably, the surface of the semi-annular body near the axis of the tubular sliding block is provided with a through groove, and a limit cover plate is fixed on this surface;

[0041] The passband groove is an arc-shaped groove with a rectangular longitudinal section. The bottom of the groove is provided with an air hole that communicates with the air pump assembly, and it is also provided with an air pressure sensor.

[0042] The passageway is fitted with a rectangular elastic band that moves in a controlled manner, and a squeeze-and-expand bladder that is a square-shaped bladder that expands and contracts in a controlled manner is also positioned therein.

[0043] The limiting cover is a rectangular curved plate that covers the surface of the semi-ring body near the axis of the tubular sliding block. It has an exposed strip groove, and the edge of the exposed strip groove is at least 2 cm away from the edge of the through strip groove.

[0044] When the compression bladder expands, it compresses the sealing strip to make it abut against the side of the limiting cover plate near the through groove; at this time, the compression bladder, the bottom of the through groove, and the sealing strip together form a sealed space; blowing air into this sealed space will cause the sealing strip to bulge out of the exposed groove and expand to form the compression bladder.

[0045] Preferably, both the semi-ring body and the tubular sliding block are provided with passage grooves for the passage of the enclosed zone;

[0046] The outer wall of the tubular sliding block is provided with multiple belt rolls;

[0047] The closed strip passes through the passage slot into the pass slot and then exits through another passage slot;

[0048] The two ends of the closed belt are respectively wound and positioned on two different belt drums; the belt drums are positioned on the outer wall of the tubular sliding block by a bracket and rotate in a controlled manner.

[0049] Furthermore, the auxiliary devices suitable for pipe welding can be used not only for welding oxygen blowing pipes, but also for welding other rigid pipes, and can be applied to pipes of different diameters.

[0050] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0051] This invention provides an auxiliary device for pipe welding. The device utilizes tubular carriers with four telescopic rod-like clamps on their inner walls to clamp and position the pipes, thus assisting in the welding process. The clamping claws of the telescopic rod-like clamps are equipped with wheels. The tubular carriers are slidably positioned on a bottom guide rail, arranged in rows of two, clamping and positioning the two pipes to be welded. Two pressure sensors are located between the two tubular carriers near the center to detect the compressive force exerted on them by the two pipes. During use, the posture of the two pipes is flexibly adjusted based on the values ​​measured by the pressure sensors to ensure precise alignment. After welding, the pipes are... Two annular bladders positioned on the inner wall of one of the tubular carriers are inflated to create a closed space near the weld. The weld is judged to be qualified by injecting gas into the closed space and monitoring the changes in gas pressure. This effectively solves the technical problems in the existing technology of pipe butt welding, such as the need for multiple people to work together, cumbersome process, time and labor consumption, difficulty in guaranteeing the butt welding effect, poor stability of the welded product, and cumbersome and complicated process of verifying the welding effect. Thus, it achieves the technical effect of convenient and efficient process of pipe butt welding, good butt welding quality and product stability, and simple and efficient process of verifying the welding effect. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the overall structure of the auxiliary device applicable to pipe welding in this application;

[0053] Figure 2 A simplified diagram showing the positional relationship between the first pipe and the V-shaped frame;

[0054] Figure 3 A schematic diagram showing the positional relationship of each component of the first pipe head positioning assembly;

[0055] Figure 4 A schematic diagram of the external structure of the first pipe head positioning assembly;

[0056] Figure 5 A schematic diagram of the internal structure of the first pipe head positioning assembly;

[0057] Figure 6 A schematic diagram of the pipe tail positioning assembly;

[0058] Figure 7 This is a schematic diagram of the structure of the second pipe head positioning assembly;

[0059] Figure 8 A schematic diagram showing the external structure of the detachable first pipe head positioning component, the detachable second pipe head positioning component, and the detachable pipe tail positioning component;

[0060] Figure 9 A schematic diagram of the detachable first tube head positioning assembly;

[0061] Figure 10 A schematic diagram showing the disassembled state of the first tube head positioning component;

[0062] Figure 11 This is a schematic diagram of the semi-ring structure;

[0063] Figure 12 This is a schematic diagram showing the positional relationship between the semi-circular body, the closed belt, and the belt drum;

[0064] Figure 13 A simplified structural diagram of the tube-enclosed assembly;

[0065] Figure 14 This is a schematic diagram showing the positional relationship between the belt roll, the closed belt, and the compression expansion bladder;

[0066] Figure 15 This is a schematic diagram of the structure of a compression and expansion bladder.

[0067] In the picture:

[0068] First tube 001, second tube 002, bottom guide rail 100, tubular sliding block 210, base rod 221, rod head wheel 222, base carrier ring 231, inflatable sealing bladder 232, semi-ring body 233, through groove 234, limiting cover plate 235, compression expansion bladder 236, sealing belt 237, belt body drum 238, passage groove 239, air pressure sensor 240, air pump assembly 250, carrier rod 261, grinding wheel 262, infrared detection assembly 270, support block 310, contact positioning body 320, tubular carrier 410, telescopic rod body 420, contact wheel 430, connecting compression spring 440, support frame 510, telescopic carrier rod 520, positioning crossbar 530, buffer pad 540, contact rolling body 550, water spray cleaning assembly 600. Detailed Implementation

[0069] To facilitate understanding of the present invention, a more complete description of this application will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of the present invention.

[0070] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0071] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0072] Example 1

[0073] For ease of description and understanding, the two pipes that need to be connected are defined as the first pipe 001 and the second pipe 002, respectively; the ends of the first pipe 001 and the second pipe 002 are welded together, and the two are combined to form a composite pipe.

[0074] like Figure 1 , Figures 3 to 7 As shown, the auxiliary device applicable to pipe welding in this application includes a bottom guide rail 100, a first pipe head positioning assembly, a second pipe head positioning assembly, two pipe tail positioning assemblies, a pipe detection assembly, a power assembly, and a control unit.

[0075] The bottom guide rail 100 is a rigid guide rail positioned laterally on the ground, which serves to bear load, provide support, and guide.

[0076] like Figures 3 to 5 As shown, the first pipe head positioning assembly is used to position the first pipe 001 near the pipe head by clamping, and includes a tubular sliding block 210, a telescopic clamping body, a pipe sealing assembly, a pressure sensor 240, and a pumping assembly 250.

[0077] The tubular sliding block 210 is a horizontally placed rigid tube with its axial direction in the same direction as the length of the bottom guide rail 100. It moves along the bottom guide rail 100 under the coordinated control of the control unit and the power component.

[0078] The telescopic clamping body is a telescopic rod with wheels at the end, and there are three of them. The axis is perpendicular to the axis of the tubular sliding block 210, and one end is fixed to the inner wall of the tubular sliding block 210. The three telescopic clamping bodies are spaced equally apart. One telescopic clamping body is set vertically, and its top is fixed to the inner top of the tubular sliding block 210.

[0079] The telescopic clamping body includes a base rod 221 and a rod head wheel 222;

[0080] The base rod 221 is a rigid telescopic rod that extends and retracts under the coordinated control of the control unit and the power component;

[0081] The rod head wheel 222 is a cylindrical wheel with an axial length greater than 8 cm. It is arranged laterally, and its axial direction is the same as the length direction of the bottom guide rail 100. It is fixed to the end of the base rod 221 away from the inner wall of the tubular sliding block 210 by a rigid bracket. At least one rod head wheel 222 rotates under the coordinated control of the control unit and the power component.

[0082] The tube sealing assembly is an airbag structure, which is connected to the air pump assembly 250 and is used to cover the combined tube body to assist in verifying the welding effect of the combined tube body.

[0083] There are two tube sealing components, both of which are fixed on the inner wall of the tubular sliding block 210 and are located on both sides of the telescopic clamping body. After the two tube sealing components expand and come into contact with the combined tube body, they work together with the tubular sliding block 210 and the combined tube body to form a sealed space.

[0084] The tube sealing assembly includes a base carrier ring 231 and an inflatable sealing bladder 232;

[0085] The base carrier ring 231 is a rigid ring with a rectangular cross-section, used to support the inflatable sealed bladder 232, and its outer ring is fixed to the inner wall of the tubular sliding block 210.

[0086] The inflatable sealing bladder 232 is coaxial with the base carrier ring 231 and is a ring-shaped bladder fixed on the inner ring of the base carrier ring 231 or a ring-shaped sheet with its edge fixed on the inner ring of the base carrier ring 231. The inflatable sealing bladder 232 is made of elastic rubber and is connected to the air pump assembly 250. Its expansion and contraction are controlled by the control unit.

[0087] The air pressure sensor 240 is connected to the control unit and is positioned on the inner wall of the tubular sliding block 210 and between the two tube sealing components. It is used to monitor the air pressure of the sealed space enclosed by the tube sealing components, the tubular sliding block 210 and the combined tube body, and thus verify whether there is air leakage at the weld position of the welded combined tube body.

[0088] The air pump assembly 250 is positioned on the tubular sliding block 210 and is a combination of an air pump, an air valve and an air delivery pipe. It is controlled by the control unit and is connected to the compression bladder 236. An air outlet is provided on the inner wall of the tubular sliding block 210, which is located between the two tube sealing assemblies.

[0089] like Figure 7 As shown, the second pipe head positioning assembly includes a support block 310 and an abutment positioning body 320;

[0090] The support block 310 is a horizontally placed rigid tube, coaxial with the tubular sliding block 210, and moves along the bottom guide rail 100 under the coordinated control of the control unit and the power component.

[0091] The structure and layout of the contact positioning body 320 are the same as those of the telescopic clamping body.

[0092] like Figure 6 As shown, there are two tail-end positioning components, both of which are slidably positioned on the bottom guide rail 100 and operate under the coordinated control of the control unit and the power component. They are respectively set near both ends of the bottom guide rail 100.

[0093] The tube tail positioning assembly includes a tubular carrier 410, a telescopic rod 420, an abutment wheel 430, and a connecting compression spring 440;

[0094] The tubular carrier 410 is a horizontally placed rigid tube, coaxial with the tubular sliding block 210, and moves along the bottom guide rail 100 under the coordinated control of the control unit and the power component.

[0095] The telescopic rod 420 is an electric telescopic rod that extends and retracts under the coordinated control of the control unit and the power component. There are three of them, and their axes are perpendicular to the axis of the tubular carrier 410 and are positioned on the tubular carrier 410. The three telescopic rods 520 are spaced equally apart from each other. One telescopic rod 420 is in a vertical state and is positioned near the top of the tubular carrier 410.

[0096] The abutting wheel 430 is a cylindrical wheel with its length direction being the same as that of the bottom guide rail 100. It is positioned on a U-shaped rigid bracket and corresponds one-to-one with the telescopic rod 420. When in use, it contacts the first tube 001 or the second tube 002.

[0097] The connecting spring 440 serves as a connection and buffer. It is a metal spring and is coaxial with the telescopic rod 420. One end is positioned at the end of the telescopic rod 420, and the other end is positioned on the U-shaped rigid bracket that supports the abutment wheel 430.

[0098] The tube detection component is used to indirectly detect whether the first tube 001 and the second tube 002 are properly connected by detecting the pressure it receives. It is positioned at the end of the tubular sliding block 210 near the bottom and on the side of the tubular sliding block 210 close to the second tube head positioning component. It includes a support frame 510, a telescopic rod 520, a positioning crossbar 530, a buffer pad 540, and a contact rolling element 550.

[0099] The support frame 510 is a rigid frame that is fixed to the end of the tubular sliding block 210 near the second tube head positioning component and is located near the bottom guide rail 100, serving as a load-bearing and support function.

[0100] The telescopic support rod 520 is a vertically installed electric telescopic rod that is controlled by a control unit to extend and retract. Its bottom is fixed to the top of the support frame 510, and its axis is perpendicular to the axis of the tubular sliding block 210.

[0101] The positioning crossbar 530 is a rigid crossbar, horizontally set, with its length direction being the same as the axial direction of the tubular sliding block 210, and its bottom center position fixed to the top of the telescopic support bar 520.

[0102] There are two buffer pads 540, which are elastic rubber pads. Each pad has a built-in pressure sensor for measuring the pressure it receives. They are located at the top of the positioning crossbar 530 near both ends. The pressure sensors are connected to the control unit.

[0103] The abutting rolling element 550 is a bullseye ball bearing with the ball facing upwards; there are two abutting rolling elements 550, which are respectively positioned on top of the two buffer pads 540.

[0104] The power assembly is used to provide power for the operation of the various components of the auxiliary device applicable to pipe welding in this application, and the control unit plays the role of controlling the coordinated operation of the various components of the auxiliary device applicable to pipe welding. Both are existing technologies and will not be described in detail here.

[0105] Preferably, the control unit is a combination of a programmable logic controller and control buttons.

[0106] Furthermore, an infrared detection component 270 is positioned on the top of both the first and second tube head positioning components. The infrared detection component 270 is signal-connected to the control unit and detects the positioning of the tube head using infrared principles (i.e., by setting an infrared transmitter and an infrared receiver to determine whether the tube head extends a specific length, such as 15 cm, from the end of the first or second tube head positioning component). This is existing technology and will not be described in detail here.

[0107] Preferably, there are three pressure sensors 240, one of which is located on the inner wall of the tubular sliding block 210, and the other two are located in the two compression bladders 236 respectively; by monitoring the pressure in the compression bladders 236, it is possible to determine whether the compression bladders 236 are leaking air.

[0108] Preferably, a grinding assembly is also provided on the inner wall of the tubular sliding block 210; the grinding assembly includes a carrier rod 261 and a grinding wheel 262; the carrier rod 261 is an electric telescopic rod with its axis perpendicular to the axis of the tubular sliding block 210, and one end is fixed on the inner wall of the tubular sliding block 210, and can be extended and retracted in a controlled manner;

[0109] The grinding wheel 262 is a grinding wheel, positioned at the end of the carrier rod 261 away from the inner wall of the tubular sliding block 210, and rotatably connected to the carrier rod 261. It rotates under the coordinated control of the control unit and the power component, thereby grinding the weld seam of the welded combined pipe body in a timely manner.

[0110] Preferably, an air jet cleaning component is positioned near the end of the inner top of the tubular sliding block 210; the air jet cleaning component is an air pump, which is controlled by the control unit to clean the weld seam of the combined pipe body by air jetting at appropriate times. During the cleaning process, the combined pipe body rotates continuously under the drive of the rod head wheel 222; the cleaning can reduce damage to the pipe sealing component.

[0111] Preferably, a water spray cleaning component 600 is positioned near the end of the inner top of the tubular sliding block 210; the water spray cleaning component 600 is a combination of a liquid pump and a nozzle, connected to a water source, and controlled by a control unit. It sprays water in a timely manner to clean the weld seam of the combined pipe body. During the cleaning process, the combined pipe body rotates continuously under the drive of the rod head wheel 222; the cleaning can reduce the probability of damage to the pipe sealing component.

[0112] Furthermore, the jet cleaning assembly and / or water spray cleaning assembly 600 can be used to rinse and clean other components of the auxiliary device applicable to pipe welding (especially the bottom guide rail 100) to avoid welding slag and dust affecting the stable operation of the device.

[0113] This application applies to auxiliary devices used for pipe welding:

[0114] 1. First, based on the diameter of the pipes to be welded (first pipe 001 and second pipe 002), the extension of the telescopic clamping body, the contact positioning body 320 and the telescopic rod 420 is adjusted using the control unit so that when the pipes to be welded are inserted into the tubular sliding block 210, the support block 310 and the tubular carrier 410, they can be supported and suspended in the air by the rod head wheel 222, the contact positioning body 320 and the contact wheel 430 without falling off;

[0115] 2. The first tube 001 is inserted through the first tube head positioning assembly and the tube tail positioning assembly near the first tube head positioning assembly, and the telescopic clamping body and the telescopic rod 420 are extended synchronously to complete the clamping and positioning; and the tube head (pipe end) of the first tube 001 is located directly above the telescopic support rod 520.

[0116] The second tube 002 passes through the second tube head positioning assembly and the tube tail positioning assembly near the second tube head positioning assembly, and clamping and positioning are completed by the synchronous extension of the contact positioning body 320 and the telescopic rod body 420.

[0117] 3. Control the first pipe head positioning assembly, the second pipe head positioning assembly, and the pipe tail positioning assembly to move laterally so that the ends of the first pipe 001 and the second pipe 002 abut together;

[0118] 4. Loosen the clamping of the tube tail positioning assembly on the first tube 001 and the second tube 002, but still ensure that the connecting spring 440 of the tube tail positioning assembly is in a compressed state;

[0119] 5. The telescopic carrier rod 520 of the control tube detection assembly extends, causing the two abutting rolling bodies 550 to contact the bottom of the first tube 001 and the second tube 002 near the tube head, respectively;

[0120] 6. Because the tubular sliding block 210 and the supporting block 310 are coaxial and the telescopic clamping body and the contact positioning body 320 have the same structure, under the compression and restraint of the telescopic clamping body and the contact positioning body 320, the position of the first tube 001 near the tube head and the position of the second tube 002 near the tube head are coaxial or nearly coaxial; the values ​​measured by the two pressure sensors will also be relatively close.

[0121] The telescopic clamping body and the contact positioning body 320 drive the first tube 001 and the second tube 002 to rotate synchronously one or more times. During the rotation of the first tube 001 and the second tube 002, the pressure sensors under the two contact rolling bodies 550 record the pressure they receive in real time. The average value of the pressure applied to the bottom contact rolling body 550 of the first tube 001 during its rotation and the average value of the pressure applied to the bottom contact rolling body 550 of the second tube 002 during its rotation are taken. The two average values ​​are then averaged again (referred to as the comprehensive average value). The first tube 001 and the second tube 002 are controlled to rotate slowly. Simultaneously, multiple telescopic rods 420 are controlled to extend and retract in coordination, and the posture of the first tube 001 and the second tube 002 is adjusted in real time so that the pressure on the two contacting rolling bodies 550 is always close to the comprehensive average value (if it is found after rotation that it is difficult to achieve the pressure on the two contacting rolling bodies 550 always close to the comprehensive average value, the relative position of the tube tail positioning component with the first tube 001 and the second tube 002 is adjusted to obtain the comprehensive average value again); the control unit records the extension and retraction time, extension and retraction amount and extension and retraction speed of each telescopic rod 420 when the first tube 001 and the second tube 002 are slowly rotated;

[0122] 7. Control the first pipe head positioning assembly, the second pipe head positioning assembly, and the pipe tail positioning assembly to move laterally so that the ends of the first pipe 001 and the second pipe 002 are further pressed together (to avoid previous looseness); use a welding machine to spot weld the contact points of the first pipe 001 and the second pipe 002 once, control the first pipe 001 and the second pipe 002 to continue rotating and spot weld them together again, then control the first pipe 001 and the second pipe 002 to continue rotating and spot weld them together again; the line connecting the three weld points is preferably an isosceles or equilateral triangle; in this step, when the first pipe 001 and the second pipe 002 rotate, the rotation speed of the two pipes and the change in the telescopic rod 420 per unit time are the same as in the previous step; use a welding machine to fill the contact point between the first pipe 001 and the second pipe 002 (forming a circumferential weld); the welding in this step is completed manually or by an automated welding machine;

[0123] 8. Control the movement of the first pipe head positioning component and the second pipe head positioning component (when moving, it is necessary to control the telescopic clamping body and the contact positioning body 320 to loosen and then clamp the combined pipe body); so that the grinding component contacts the weld, control the rotation of the combined pipe body, and grind and repair the weld; then use the air jet cleaning component and / or water spray cleaning component 600 to clean the debris around the weld.

[0124] 9. Control the movement of the first pipe head positioning assembly so that the two pipe sealing assemblies are respectively located on both sides of the weld; control the inflation sealing bladder 232 to expand and contact the combined pipe body and form an annular sealed space together with the tubular sliding block 210; control the air pump assembly 250 to inflate the sealed space; after inflation, wait for more than 30 seconds to observe the air pressure change measured by the air pressure sensor 240 to determine whether the welding is qualified; if it is determined to be unqualified, the inflation sealing bladder 232 can be controlled to expand and contract again for a second test as verification;

[0125] 10. Finally, remove the combined tube body.

[0126] Preferably, the auxiliary device for pipe welding in this application, in conjunction with a robotic arm and an automated welding machine, can automatically complete the material handling, welding, and inspection process of the assembled pipe.

[0127] Preferably, the auxiliary device for pipe welding in this application can be used not only for welding oxygen blowing pipes, but also for welding other rigid pipes, and can be applied to pipes of different diameters.

[0128] Preferred, such as Figures 8 to 10 As shown, to facilitate the insertion and removal of the first tube 001 and the second tube 002, the tubular sliding block 210, the supporting block 310, and the tubular carrier 410 are all composed of two arc-shaped plates hinged together; the basic carrier ring 231 is composed of two semi-rings 233; the semi-rings 233 are arc-shaped bent rods; the inflatable sealed bladder 232 is composed of two bent rod-shaped bladders positioned on the two semi-rings 233; the tubular sliding block 210, the supporting block 310, and the tubular carrier 410 deform to expose openings under the coordinated control of the control unit and the power component to facilitate the insertion and removal of the tubes.

[0129] The technical solutions described in the embodiments of this application above have at least the following technical effects or advantages:

[0130] This invention solves the technical problems in existing technologies, such as the need for multiple people to work together during pipe butt welding, cumbersome process, time and labor consumption, difficulty in guaranteeing the butt welding effect, poor stability of the welded product, and complicated and tedious process for verifying the welding effect. It achieves the technical effect of convenient and efficient process for pipe butt welding, good butt welding quality and stability of the finished product, and simple and efficient process for verifying the welding effect.

[0131] Example 2

[0132] Considering the harsh working environment of the inflatable sealing bladder 232, which is prone to damage and leakage, and the relatively cumbersome process of replacing it after a leak is discovered during use, which can delay the operation process to some extent, in order to further improve the practicality and ease of use of the device of this application, the embodiment of this application optimizes and improves the structure of the tube sealing component based on the above embodiment, and utilizes the belt body to form a bladder, thereby greatly improving the replacement efficiency of the inflatable sealing bladder 232, specifically as follows:

[0133] like Figures 11 to 15 As shown, the semi-annular body 233 has a pass-through groove 234 on the surface near the axis of the tubular sliding block 210; the pass-through groove 234 is an arc-shaped groove with a rectangular longitudinal section; the bottom of the pass-through groove 234 has an air hole that communicates with the air pump assembly 250; each pass-through groove 234 is equipped with a pressure sensor 240 that is connected to the control unit signal.

[0134] A sealing strip 237 is inserted into the through groove 234; the sealing strip 237 is a rectangular elastic band, which is used to cooperate with other components on the semi-ring 233 to form an inflatable sealing bag 232.

[0135] A limiting cover plate 235 is fixed on the surface of the semi-annular body 233 near the axis of the tubular sliding block 210;

[0136] The limiting cover 235 is a rectangular curved plate that covers the surface of the semi-annular body 233 near the axis of the tubular sliding block 210; the limiting cover 235 is provided with a strip groove for exposing the closed strip 237 in the through strip groove 234; the space enclosed by the strip groove is a rectangular plate that is curved into an arc; the edge of the strip groove is at least 2 cm away from the edge of the through strip groove 234;

[0137] A compression bladder 236 is also positioned on the semi-annular body 233. The compression bladder 236 is a U-shaped bladder, fixed to the bottom of the through-slot 234, and connected to the air pump assembly 250. It expands and contracts in a controlled manner to compress and fix the sealing strip 237 as needed. When the compression bladder 236 expands, it compresses the sealing strip 237 so that it abuts against the surface of the limiting cover plate 235 near the through-slot 234. At this time, the compression bladder 236, the bottom of the through-slot 234, and the sealing strip 237 together form a sealed space. Blowing air into this sealed space will cause the sealing strip 237 to bulge out from the exposed strip groove and expand into a bent rod-shaped bladder (i.e., forming the compression bladder 236).

[0138] Both the semi-ring 233 and the tubular sliding block 210 are provided with passage grooves 239 for the passage of the closed strip 237; the closed strip 237 passes through the passage grooves 239; there are two passage grooves 239 on the semi-ring 233, which are respectively located near both ends of the semi-ring 233 and are both connected to the passage groove 234; the passage grooves 239 on the tubular sliding block 210 are connected to the passage grooves 239 on the semi-ring 233;

[0139] The outer wall of the tubular sliding block 210 is provided with a plurality of belt drums 238 for winding and releasing the closed belt 237;

[0140] The closed band 237 is a band made of elastic rubber, which passes through the passage groove 239 into the passage groove 234 and then out through another passage groove 239; the closed band 237 inside the compression expansion bladder (236) is closely attached to the compression expansion bladder 236.

[0141] The two ends of the sealing tape 237 are respectively wound and positioned on two different tape reels 238; the tape reels 238 are positioned on the outer wall of the tubular sliding block 210 by a bracket, and rotate under the coordinated control of the control unit and the power component, thereby timely winding and releasing the sealing tape 237 to realize the renewal of the inflatable sealing bag 232.

[0142] During use, if the control unit detects that the inflatable sealing bladder 232 is leaking (the air pressure inside the bladder changes) and needs to be handled, it can control the compression bladder 236 to contract and then control the belt drum 238 to rotate and drive the sealing belt 237 to move; thereafter, it controls the compression bladder 236 to expand and compress the sealing belt 237 to form a new inflatable sealing bladder 232.

[0143] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An auxiliary device for pipe body welding, characterized in that: It comprises a bottom guide rail (100) positioned on the ground, a first pipe head positioning assembly, a second pipe head positioning assembly, two pipe tail positioning assemblies, and a pipe detection assembly; The main bodies of the first pipe head positioning assembly, the second pipe head positioning assembly, and the pipe tail positioning assemblies are tubular bodies with retractable rod-shaped clamping bodies on the inner side walls, and are slidably positioned on the bottom guide rail. Two of them are arranged in a group and side by side in a row, and each group is used for clamping and positioning one pipe body. The first pipe head positioning assembly and the second pipe head positioning assembly are located in the middle. The clamping jaw end of the retractable rod-shaped clamping body is provided with a wheel body. The pipe detection assembly is located between the first pipe head positioning assembly and the second pipe head positioning assembly, and the core structure is two controlled lifting pressure sensors. When in use, they respectively contact the bottoms of the two pipe bodies near the pipe heads, and the posture of the two pipe bodies is fed back by using the measured pressure. Before welding, the posture of the two pipe bodies is adjusted according to the measured value of the pressure sensor by using a plurality of retractable rod-shaped clamping bodies. The first pipe head positioning assembly comprises a tubular sliding load block (210) and two controlled ring-shaped elastic capsules positioned on the inner wall of the tubular sliding load block (210). When the welding effect needs to be tested, an enclosed space is formed by the elastic capsule, the inner wall of the tubular sliding load block (210), and the outer wall of the welded combined pipe body. Whether it is qualified or not is obtained by injecting gas into the space and paying attention to the change of gas pressure. The first pipe head positioning assembly further comprises a telescopic clamping body. The tubular sliding load block (210) is a transversely arranged hard pipe body, which slides along the bottom guide rail (100). The telescopic clamping body is a telescopic rod with a wheel body at the end, and the number is three. The telescopic clamping body comprises a base rod (221) and a rod head wheel (222). At least one rod head wheel (222) is controlled to rotate. The rod head wheel (222) is a cylindrical wheel body with an axial length greater than 8 cm, which is transversely arranged and has the same length direction as the bottom guide rail (100). The number of the pipe tail positioning assemblies is two, which are positioned on the bottom guide rail (100) and are respectively arranged near the two ends of the bottom guide rail (100). The pipe tail positioning assembly comprises a tubular carrier (410), a telescopic rod body (420), a contact wheel (430), and a connecting compression spring (440). The tubular carrier (410) is coaxial with the tubular sliding load block (210). The telescopic rod body (420) is controlled to be telescopic, and the number is three, which is positioned on the tubular carrier (410). The contact wheel (430) has the same length direction as the bottom guide rail (100), and is positioned on the hard bracket in the shape of a Chinese character "fang", and corresponds to the telescopic rod body (420) one by one. The connecting compression spring (440) is coaxial with the telescopic rod body (420), one end is positioned at the end of the telescopic rod body (420), and the other end is positioned on the hard bracket supporting the contact wheel (430).

2. The auxiliary device for welding of pipe bodies according to claim 1, characterized in that: The first pipe head positioning assembly further comprises a pipe sealing assembly, a gas pressure sensor (240), and a pump assembly (250). The pipe sealing assembly is in communication with the pump assembly (250), and the number is two, which is used for covering the combined pipe body to assist in verifying the welding effect of the combined pipe body. The air pressure sensor (240) is positioned on the inner wall of the tubular sliding carrier (210) and between the two pipe sealing assemblies; The pump assembly (250) has an air outlet on the inner wall of the tubular sliding carrier (210) and between the two pipe sealing assemblies.

3. The auxiliary device for welding of pipe bodies according to claim 2, characterized in that: The number of the pipe sealing assemblies is two, which are fixed on the inner wall of the tubular sliding carrier (210) and on both sides of the telescopic clamping body respectively. The pipe sealing assembly comprises a base carrier ring (231) and an inflatable sealing bag (232). The base carrier ring (231) is a hard ring body with a rectangular cross section, and the outer ring is fixed on the inner wall of the tubular sliding carrier (210). The inflatable sealing bag (232) is coaxial with the base carrier ring (231), which is a ring-shaped bag body fixed on the inner ring of the base carrier ring (231) or a sheet body with the edge fixed on the base carrier ring (231), and is made of elastic rubber material, which is in communication with the pump assembly (250) and is controlled to expand and shrink.

4. The auxiliary device for welding of pipe bodies according to claim 3, characterized in that: The second pipe head positioning assembly comprises a support carrier (310) and a contact positioning body (320). The support carrier (310) is a horizontal hard pipe body coaxial with the tubular sliding carrier (210) and is controlled to move. The structure and layout of the contact positioning body (320) are the same as those of the telescopic clamping body.

5. The auxiliary device for welding of pipe bodies according to claim 4, characterized in that: The pipe detection assembly comprises a support frame (510), a telescopic carrier rod (520), a positioning cross rod (530), a buffer pad (540), and a contact rolling body (550). The support frame (510) is fixed on the end of the tubular sliding carrier (210) close to the second pipe head positioning assembly. The telescopic carrier rod (520) is vertically arranged and controlled to stretch and retract, and the bottom is fixed on the top of the support frame (510) with the axis perpendicular to the axis of the tubular sliding carrier (210). The positioning cross rod (530) is horizontally arranged with the length direction the same as the axial direction of the tubular sliding carrier (210), and the bottom center is fixed on the top of the telescopic carrier rod (520). The number of the buffer pads (540) is two, which are elastic rubber pads, each of which is internally provided with a pressure sensor for measuring the pressure received by itself and is positioned on the top of the positioning cross rod (530) close to the two ends. The contact rolling body (550) is a cow eye ball with the ball upward, and the number is two, which are positioned on the top of the two buffer pads (540).

6. The auxiliary device for welding of pipe bodies according to claim 5, characterized in that: The tubular sliding carrier (210), the support carrier (310), and the tubular carrier (410) are composed of two arc-shaped plates; the base carrier ring (231) is composed of two half rings (233); the half ring (233) is an arc-shaped bending rod; the inflatable sealing bag (232) is composed of two bending rod-shaped bag bodies positioned on the two half rings (233); the tubular sliding carrier (210), the support carrier (310), and the tubular carrier (410) are controlled to deform to expose the opening for the insertion and removal of the pipe body.

7. The auxiliary device for welding of pipe bodies according to claim 6, characterized in that: The half ring body (233) is provided with a through belt groove (234) on the surface close to the axis of the tubular sliding carrier (210), and a limiting cover plate (235) is fixed on the surface; The through belt groove (234) is an arc-shaped groove body, and the longitudinal section is rectangular. The groove bottom is provided with an air hole communicated with the air pumping assembly (250), and is further provided with an air pressure sensor (240); The through belt groove (234) is provided with a controlled moving closed belt (237) which is a rectangular elastic belt body, and is further provided with a controlled expansion and contraction extrusion expansion bag (236) which is a mouth-shaped bag body; The limiting cover plate (235) is a rectangular bent plate, and covers the surface of the half ring body (233) close to the axis of the tubular sliding carrier (210). The limiting cover plate (235) is provided with a belt exposure groove, and the edge of the belt exposure groove is at least 2 cm away from the edge of the through belt groove (234); When the extrusion expansion bag (236) expands, the closed belt (237) is extruded to abut against the surface of the limiting cover plate (235) close to the through belt groove (234). At this time, the extrusion expansion bag (236), the groove bottom of the through belt groove (234) and the closed belt (237) together form a closed space. Blowing air into the closed space will make the closed belt (237) protrude and expand from the belt exposure groove to form the extrusion expansion bag (236).

8. The auxiliary device for welding of pipe bodies according to claim 7, characterized in that: The half ring body (233) and the tubular sliding carrier (210) are both provided with a passing groove (239) for the closed belt (237) to pass through; The tubular sliding carrier (210) is provided with a plurality of belt body winding drums (238) on the outer wall; The closed belt (237) passes into the through belt groove (234) from the passing groove (239) and then passes out from another passing groove (239); The two ends of the closed belt (237) are respectively wound and positioned on two different belt body winding drums (238). The belt body winding drums (238) are positioned on the outer wall of the tubular sliding carrier (210) through supports and are controlled to rotate.

9. The auxiliary device for pipe welding according to claim 1, characterized in that: The auxiliary device suitable for pipe body welding can not only be used for welding oxygen blowing pipes, but also can be used for welding other hard pipes, and can be suitable for pipes of different diameters.

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