A stainless steel instrument tube welding device and process

Abstract

The present invention belongs to the technical field of welding equipment, and specifically relates to a stainless steel instrument tube welding device and process, comprising a welding machine, a driving wheel, an instrument tube, and a fusible ring. The welding machine is provided with a sealing cover, a rotating wheel is driven to rotate by a driving mechanism in the sealing cover, a welding head is fixedly mounted on the inner side wall of the rotating wheel, semicircular grooves are formed on both sides of the sealing cover and the welding machine, and a mounting ring is fixedly connected to the inner wall of the semicircular groove on the welding machine. Two different steel pipes are inserted from both sides of the welding machine into the welding machine, and a fusible ring is pre-placed on one of the instrument tubes. The sealing cover is then opened to move the instrument tubes to the middle for contact, and the sealing cover is then closed. This allows the instrument tubes to be welded in a closed environment, and an I-shaped groove is formed at the contact point of the two instrument tubes. The I-shaped groove and the fusible ring are self-welded, and the weld is raised, thereby complying with regulations and specifications.

Description

Technical Field

[0001] The invention belongs to the technical field of welding equipment, in particular to a stainless steel instrument tube welding device and process. Background Art

[0002] There are many ways to weld stainless steel instrument pipe. Commonly used stainless steel welding methods include TIG (argon arc welding) and MIG (gas metal arc welding). TIG welding is typically used when high weld quality and appearance are critical, while MIG welding is suitable for larger welding tasks. These welding methods are all used to weld two pieces of stainless steel instrument pipe together.

[0003] However, these techniques often suffer from the following drawbacks: Currently, stainless steel instrument pipes are welded using manual argon arc welding, which places high demands on welders, results in low efficiency, and results in inconsistent weld quality. Enclosed, all-position TIG automatic argon arc welding, which primarily utilizes a wire-free, autogenous welding method, is widely used for installing stainless steel pipes in industries such as food and medicine. Because the weld surface of this autogenous, wire-free weld may appear lower than the base material, it does not comply with power plant welding regulations for the high-temperature, high-pressure conditions of ultra-supercritical units in thermal power plants. Therefore, the present invention provides a welding device and process for stainless steel instrument pipes. Summary of the Invention

[0004] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0005] The technical solution adopted by the present invention to solve its technical problem is as follows: a stainless steel instrument tube welding device described in the present invention comprises a welding machine, a driving wheel, an instrument tube and a fusible ring; a sealing cover is provided on the welding machine, a driving mechanism in the sealing cover drives a rotating wheel to rotate, a welding head is fixedly installed on the inner side wall of the rotating wheel, semicircular grooves are provided on both sides of the sealing cover and the welding machine, a mounting ring is fixedly connected to the inner wall of the semicircular groove on the welding machine, the center part of the mounting ring can be used to limit the instrument tube, and the fusible ring is sleeved on the instrument tube; by inserting two different steel pipes from both sides of the welding machine into the welding machine, and sleeved the fusible ring on one of the instrument tubes in advance, and then Finally, open the sealing cover and move the instrument tube to the middle for contact, and then close the sealing cover so that the instrument tube can be welded in a closed environment. Then the driving mechanism drives the rotating wheel to rotate, and at the same time, the welding head welds the fusible ring. The contact point of the two instrument tubes will form an I-type groove. The I-type groove plus the fusible ring is self-melting welded, and the weld is raised, which meets the regulations and specifications. At the same time, the fusible ring can also increase the direct welding area of ​​the instrument tube, realizing the closed full-position TIG automatic argon arc welding combined with the new process of fusible ring, overcoming the problem that the weld surface may be lower than the base material due to the closed full-position TIG automatic argon arc welding self-melting without wire, so that the welding joint can meet the power station welding regulations and specifications.

[0006] Preferably, one side of the inner wall of the welding machine is fixedly connected to an electric telescopic rod through a bracket, and one side of the inner wall of the welding machine corresponding to the electric telescopic rod is fixedly connected to a connecting column through the bracket, and a positioning column is slidably connected to the connecting column, and a moving mechanism for driving the positioning column to move is provided in the welding machine; because after the fusible ring is put on the instrument tube, manual operation is required to move the fusible ring to the connection of the instrument tube, and the entire welding process is too troublesome. The fusible ring can be put on one of the instrument tubes through the above-mentioned mechanism, and then the fusible ring is placed in the welding machine. After that, the electric telescopic rod can be started to move the output end of the electric telescopic rod, and the positioning column is driven to move with the help of the moving mechanism. At this time, the output end of the electric telescopic rod and the positioning column will move close to each other, and finally the fusible ring will be clamped at the connection of the instrument tube, thereby achieving the effect of automatically positioning the fusible ring and improving the convenience of welding the instrument tube. After that, the output end of the electric telescopic rod and the positioning column are reset, and then the welding head can be allowed to weld the instrument tube.

[0007] Preferably, the moving mechanism includes a hollow elastic block, the elastic block is fixedly connected to one side of the inner wall of the welding machine near the connecting column, a hose is communicated between the elastic block and the inside of the connecting column, a reset elastic piece is provided between the positioning column and the inner wall of the connecting column, the output end of the electric telescopic rod is fixedly connected to the connecting rod, and one end of the connecting rod away from the electric telescopic rod is fixedly connected to a pressure plate that squeezes the elastic block; when the output end box of the electric telescopic rod is close to one end of one side of the rotating wheel, it will drive the connecting rod to move together. At this time, the moving rod will drive the pressure plate to squeeze the elastic block, so that the gas in the elastic block enters the connecting column from the hose and pushes the positioning column. At this time, the positioning column will move synchronously with the output end of the electric telescopic rod, thereby clamping the fusible ring at the connection of the instrument pipe. Through the above mechanism, the positioning column can be synchronously driven to move when the output end of the electric telescopic rod moves, without the need to add other power mechanisms to drive the positioning column to move, saving resources.

[0008] Preferably, the output end of the electric telescopic rod is fixedly connected to a storage sleeve through a bracket, the inner wall of the storage sleeve is provided with a plurality of groups of grooves, the inner walls of the grooves are fixedly connected with hollow and elastic protrusions, the fusible ring is stored in the storage sleeve, and the side of the storage sleeve away from the rotating wheel is slidably connected with a push rod for pushing the fusible ring, and the end of the push rod away from the fusible ring is fixedly connected to the inner wall of the sealing cover; by opening the sealing cover, the push rod is separated from the storage sleeve, and then the fusible ring is stored in the storage sleeve, at this time the protrusion will limit the fusible ring, and then the sealing cover will be closed, and then when the instrument tube enters the welding machine, all the fusible rings will be sleeved on the instrument tube. At this time, the electric telescopic rod is started, and the output end of the electric telescopic rod is moved to the side close to the push rod. At this time, the push rod will push the fusible ring, so that the front fusible ring will be detached from the storage sleeve, and the remaining ones will be limited by the protrusion. When the fusible ring passes the protrusion, the protrusion will be squeezed and deformed into the groove. At this time, the protrusion can also limit the fusible ring, and then the output end of the electric telescopic rod is moved to the side of the rotating wheel. At this time, the fusible ring that is detached from the storage sleeve will still be pushed by the storage sleeve until it moves to the connection of the instrument tube, and then the storage sleeve is moved away from the rotating wheel. The fusible ring can be stored through the above mechanism, thereby achieving the function of automatic loading and unloading.

[0009] Preferably, the inner wall of the mounting ring is fixedly connected to the first connecting ring, the inner wall of the first connecting ring is sleeved with the second connecting ring, the inner wall of the second connecting ring is sleeved with the third connecting ring, the inner walls of the first connecting ring and the second connecting ring are both provided with an annular groove, the outer side walls of the third connecting ring, the second connecting ring and the third connecting ring are both fixedly connected with a fixing block slidably connected to the annular groove, the first connecting ring and the second connecting ring are both provided with a connecting groove communicating with the annular groove on the side away from the rotating wheel, and the first connecting ring, the second connecting ring and the third connecting ring are all fixedly connected to a connecting rod on the side away from the rotating wheel; due to the different diameters of different instrument tubes, the mounting ring cannot be adapted for all instrument tubes. At this time, the appropriate connecting ring can be selected according to actual needs. When it is needed When using the second connecting ring, you can rotate the round rod on the first connecting ring to allow the fixed block on the first connecting ring to rotate in the annular groove at the connecting groove, and then pull the round rod to disengage the fixed block from the annular groove and the connecting groove, thereby removing the first connecting ring. At this time, you can use the second connecting ring to limit the instrument tube, and the instrument tube will pass through the inner wall of the second connecting ring. Repeat the above operation when you need to use the third connecting ring. When you need to install the first connecting ring, you only need to install the fixed block into the connecting groove, and then enter the annular groove, and then rotate the first connecting ring to move the fixed block away from the connecting groove. At this time, the annular groove will limit the first connecting ring. Different connecting rings can be used through the above mechanism, which is convenient for limiting instrument tubes of different diameters.

[0010] Preferably, the mounting ring is slidably connected to a positioning plate on one side close to the round rod, and a limiting groove that fits the round rod is provided on the bottom surface of the positioning plate; since the welding machine is used daily, the staff may accidentally touch the round rod, causing the fixing block to detach from the annular groove, thereby affecting the welding work of the instrument tube, at this time, the round rod can be limited by the limiting groove on the positioning plate to prevent the connecting ring from rotating incorrectly. When the connecting ring needs to be rotated, the positioning plate can be moved upward so that the limiting groove no longer limits the round rod.

[0011] A stainless steel instrument tube welding process, which uses the above-mentioned stainless steel instrument tube welding device, includes the following steps:

[0012] S1: Open the sealing cover and store the fusible ring in the storage sleeve. The protrusion will limit the fusible ring. Then close the sealing cover to allow the instrument tube to be welded in a closed environment. Then insert the two instrument tubes into the first connecting rings on both sides and make the instrument tubes contact each other.

[0013] S2: Start the electric telescopic rod and move the output end of the electric telescopic rod toward the side close to the push rod. At this time, the push rod pushes the fusible ring, causing the front fusible ring to detach from the storage sleeve.

[0014] S3: Start the electric telescopic rod again, and move the output end of the electric telescopic rod toward the side of the rotating wheel. At this time, the fusible ring separated from the storage sleeve will still be pushed by the storage sleeve until it moves to the connection point of the instrument tube.

[0015] S4: Then let the output end of the electric telescopic rod drive the storage sleeve away from the rotating wheel, and then use the welding head to weld the fusible ring and the instrument tube. The welding time is 1min-2min.

[0016] The above welding process allows stainless steel instrument tubes to be welded in a fully enclosed environment, realizing a new process of enclosed all-position TIG automatic argon arc welding combined with a fusible ring.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The present invention inserts two different steel pipes into the welding machine from both sides, and puts a fusible ring on one of the instrument pipes in advance. Then, the sealing cover is opened and the instrument pipe is moved to the middle for contact. The sealing cover is then closed, so that the instrument pipes can be welded in a closed environment. The contact points of the two instrument pipes will form an I-shaped groove. The I-shaped groove plus the fusible ring are self-welded, and the weld is raised, thus meeting the regulations and specifications.

[0019] 2. The present invention places a fusible ring on one of the instrument tubes and then places the fusible ring in the welding machine. After that, the electric telescopic rod can be started to move the output end of the electric telescopic rod. At the same time, the positioning column is driven to move by the moving mechanism. At this time, the output end of the electric telescopic rod and the positioning column will move closer to each other, and finally the fusible ring is clamped at the connection of the instrument tube, thereby achieving the effect of automatically positioning the fusible ring and improving the convenience of welding the instrument tube. After that, the output end of the electric telescopic rod and the positioning column are reset, and then the welding head can be used to weld the instrument tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 is a perspective view of the present invention;

[0022] Figure 2 This is a schematic structural diagram of the welding machine of the present invention after removing the sealing cover;

[0023] Figure 3 is a cross-sectional view of the storage sleeve of the present invention;

[0024] Figure 4 It is a schematic structural diagram of the first connecting ring, the second connecting ring and the third connecting ring in the present invention;

[0025] Figure 5 yes Figure 1 A magnified view of point A;

[0026] Figure 6 It is a structural diagram of embodiment 2 of the present invention;

[0027] Figure 7 It is a process flow chart of the present invention.

[0028] In the figure: 1. welding machine; 2. sealing cover; 3. rotating wheel; 4. welding head; 5. mounting ring; 6. fusible ring; 7. electric telescopic rod; 8. hose; 9. connecting column; 10. elastic block; 11. pressure plate; 12. connecting rod; 13. push rod; 14. storage sleeve; 15. positioning column; 16. groove; 17. protrusion; 18. first connecting ring; 19. second connecting ring; 20. third connecting ring; 21. fixing block; 22. connecting groove; 23. round rod; 24. positioning plate; 25. pressure sensor; 26. annular groove. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0030] Example 1: Figures 1 to 5 As shown, a stainless steel instrument tube welding device according to an embodiment of the present invention includes a welding machine 1, a driving wheel, an instrument tube and a fusible ring 6; a sealing cover 2 is provided on the welding machine 1, a driving mechanism inside the sealing cover 2 drives a rotating wheel 3 to rotate, a welding head 4 is fixedly installed on the inner side wall of the rotating wheel 3, semicircular grooves are provided on both sides of the sealing cover 2 and the welding machine 1, a mounting ring 5 is fixedly connected to the inner wall of the semicircular groove on the welding machine 1, the center of the mounting ring 5 can be used to limit the instrument tube, and the fusible ring 6 is sleeved on the instrument tube; by inserting two different steel pipes from both sides of the welding machine 1 into the welding machine 1, and sleeved on one of the instrument tubes in advance, and then opening The sealing cover 2 moves the instrument tube to the middle for contact, and then the sealing cover 2 is closed, so that the instrument tube can be welded in a closed environment. Then the driving mechanism drives the rotating wheel 3 to rotate, and at the same time, the welding head 4 welds the fusible ring 6. The contact point of the two instrument tubes will form an I-type groove. The I-type groove plus the fusible ring 6 are self-melting welded, and the weld is raised, which meets the regulations and specifications. At the same time, the fusible ring 6 can also increase the direct welding area of ​​the instrument tube, realizing the closed full-position TIG automatic argon arc welding combined with the new process of fusible ring 6, overcoming the problem that the weld surface of the weld may be lower than the base material due to the closed full-position TIG automatic argon arc welding without wire addition, so that the weld joint can meet the power station welding regulations and specifications.

[0031] An electric telescopic rod 7 is fixedly connected to one side of the inner wall of the welding machine 1 through a bracket, and a connecting column 9 is fixedly connected to the side of the inner wall of the welding machine 1 corresponding to the electric telescopic rod 7 through a bracket. A positioning column 15 is slidably connected in the connecting column 9, and a moving mechanism for driving the positioning column 15 to move is provided in the welding machine 1; since after the fusible ring 6 is put on the instrument tube, it is necessary to manually move the fusible ring 6 to the connection of the instrument tube, which makes the operation of the entire welding process too troublesome. The fusible ring 6 can be put on one of the instrument tubes through the above-mentioned mechanism, and then the fusible ring 6 is placed in the welding machine 1, and then the electric telescopic rod 7 can be started to move the output end of the electric telescopic rod 7, and the positioning column 15 is driven to move by the moving mechanism. At this time, the output end of the electric telescopic rod 7 and the positioning column 15 will move close to each other, and finally the fusible ring 6 is clamped at the connection of the instrument tube, thereby achieving the effect of automatically positioning the fusible ring 6 and improving the convenience of welding the instrument tube. After that, the output end of the electric telescopic rod 7 and the positioning column 15 are reset, and then the welding head 4 can be allowed to weld the instrument tube.

[0032] The moving mechanism includes a hollow elastic block 10, which is fixedly connected to the inner wall of the welding machine 1 near the connecting column 9. A hose 8 is connected between the elastic block 10 and the inside of the connecting column 9. A reset elastic member is provided between the positioning column 15 and the inner wall of the connecting column 9. The output end of the electric telescopic rod 7 is fixedly connected to a connecting rod 12, and the end of the connecting rod 12 away from the electric telescopic rod 7 is fixedly connected to a pressure plate 11 for squeezing the elastic block 10; when the output end box of the electric telescopic rod 7 is close to one end of the rotating wheel 3, it will The connecting rod 12 is driven to move together. At this time, the moving rod will drive the pressure plate 11 to squeeze the elastic block 10, so that the gas in the elastic block 10 enters the connecting column 9 from the hose 8 and pushes the positioning column 15. At this time, the positioning column 15 will move synchronously with the output end of the electric telescopic rod 7, thereby clamping the fusible ring 6 at the connection of the instrument tube. Through the above mechanism, the positioning column 15 can be synchronously driven to move when the output end of the electric telescopic rod 7 moves, without the need to add other power mechanisms to drive the positioning column 15 to move, saving resources.

[0033] The output end of the electric telescopic rod 7 is fixedly connected to a storage sleeve 14 through a bracket. The inner wall of the storage sleeve 14 is provided with multiple groups of grooves 16. The inner wall of the groove 16 is fixedly connected with a hollow and elastic protrusion 17. The fusible ring 6 is stored in the storage sleeve 14. The storage sleeve 14 is slidably connected to the side away from the rotating wheel 3 to push the fusible ring 6. The end of the push rod 13 away from the fusible ring 6 is fixedly connected to the inner wall of the sealing cover 2; by opening the sealing cover 2, the push rod 13 is separated from the storage sleeve 14 at this time, and then the fusible ring 6 is stored in the storage sleeve 14. At this time, the protrusion 17 will limit the fusible ring 6, and then the sealing cover 2 will be closed. After that, when the instrument tube enters the welding machine 1, all the fusible rings 6 will be sleeved on the instrument tube. At this time, the electric telescopic rod 7 is started, and the output end of the electric telescopic rod 7 is moved to the side close to the push rod 13. At this time, the push rod 13 will push the fusible ring 6, so that the front fusible ring 6 will be detached from the storage sleeve 14, and the rest will be limited by the protrusion 17. When the fusible ring 6 passes the protrusion 17, the protrusion 17 will be squeezed and deformed into the groove 16. At this time, the protrusion 17 can also limit the fusible ring 6, and then the output end of the electric telescopic rod 7 is moved to the side of the rotating wheel 3. At this time, the fusible ring 6 that is detached from the storage sleeve 14 will still be pushed by the storage sleeve 14 until it moves to the connection of the instrument tube, and then the storage sleeve 14 is moved away from the rotating wheel 3. The fusible ring 6 can be stored through the above mechanism, thereby achieving the effect of automatic loading and unloading.

[0034] The inner wall of the mounting ring 5 is fixedly connected with a first connecting ring 18, the inner wall of the first connecting ring 18 is covered with a second connecting ring 19, and the inner wall of the second connecting ring 19 is covered with a third connecting ring 20. The inner walls of the first connecting ring 18 and the second connecting ring 19 are provided with an annular groove 26, and the outer side walls of the third connecting ring 20, the second connecting ring 19 and the third connecting ring 20 are fixedly connected with a fixing block 21 which is slidably connected to the annular groove 26. The first connecting ring 18 and the second connecting ring 19 are provided with a connecting groove 22 which is connected to the annular groove 26 on the side away from the rotating wheel 3. The first connecting ring 18, the second connecting ring 19 and the third connecting ring 20 are fixedly connected with a connecting rod 12 on the side away from the rotating wheel 3. Due to the different diameters of different instrument tubes, the mounting ring 15 cannot be adapted for all instrument tubes. At this time, the appropriate connecting ring can be selected according to actual needs. When it is needed, When the second connecting ring 19 is used, the round rod 23 on the first connecting ring 18 can be rotated to allow the fixing block 21 on the first connecting ring 18 to rotate in the annular groove 26 to the connecting groove 22, and then the round rod 23 can be pulled to allow the fixing block 21 to disengage from the annular groove 26 and the connecting groove 22, thereby removing the first connecting ring 18. At this time, the second connecting ring 19 can be used to limit the instrument tube, and the instrument tube will pass through the inner wall of the second connecting ring 19. Repeat the above operation when the third connecting ring 20 needs to be used. When the first connecting ring 18 needs to be installed, it is only necessary to install the fixing block 21 into the connecting groove 22, and then enter the annular groove 26. After that, the first connecting ring 18 is rotated to allow the fixing block 21 to move away from the connecting groove 22. At this time, the annular groove 26 will limit the first connecting ring 18. Different connecting rings can be used through the above mechanism, thereby facilitating the limiting of instrument tubes of different diameters.

[0035] The side of the mounting ring 5 close to the round rod 23 is slidably connected with a positioning plate 24, and the bottom surface of the positioning plate 24 is provided with a limiting groove that fits with the round rod 23; since the welding machine 1 is used daily, the staff may accidentally touch the round rod 23, thereby causing the fixing block 21 to disengage from the annular groove 26, thereby affecting the welding work of the instrument tube. At this time, the round rod 23 can be limited by the limiting groove on the positioning plate 24 to prevent the connecting ring from rotating incorrectly. When the connecting ring needs to be rotated, the positioning plate 24 can be moved upward so that the limiting groove no longer limits the round rod 23.

[0036] Example 2: Figure 6As shown, compared with Example 1, another embodiment of the present invention is as follows: a pressure sensor 25 is fixedly connected to one end of the positioning column 15 close to the electric telescopic rod 7, and the pressure sensor 25 controls the electric telescopic rod 7 through a controller; when the output end of the electric telescopic rod 7 and the positioning column 15 clamp the fusible ring 6, the pressure sensor 25 will feel the pressure, and at this time, the output end of the electric telescopic rod 7 will be controlled to move away, thereby achieving the effect of automatically resetting the output end of the electric telescopic rod 7 after the fusible ring 6 is positioned.

[0037] like Figure 7 As shown, a stainless steel instrument tube welding process, which uses the above-mentioned stainless steel instrument tube welding device, includes the following steps:

[0038] S1: Open the sealing cover 2 and store the fusible ring 6 in the storage sleeve 14. The protrusion 17 will limit the fusible ring 6. Then close the sealing cover 2 to allow the instrument tube to be welded in a closed environment. Then, insert the two instrument tubes into the first connecting rings 18 on both sides respectively, and make the instrument tubes contact each other.

[0039] S2: Start the electric telescopic rod 7 and move the output end of the electric telescopic rod 7 toward the side close to the push rod 13. At this time, the push rod 13 pushes the fusible ring 6, so that the front fusible ring 6 is separated from the storage sleeve 14.

[0040] S3: Start the electric telescopic rod 7 again, so that the output end of the electric telescopic rod 7 moves toward the side of the rotating wheel 3. At this time, the fusible ring 6 separated from the storage sleeve 14 will still be pushed by the storage sleeve 14 until it moves to the connection point of the instrument tube;

[0041] S4: Then, the output end of the electric telescopic rod 7 drives the storage sleeve 14 away from the rotating wheel 3, and then the welding head 4 is used to weld the fusible ring 6 and the instrument tube. The welding time is 1 min to 2 min.

[0042] The above welding process allows stainless steel instrument tubes to be welded in a fully enclosed environment, realizing the new process of enclosed all-position TIG automatic argon arc welding combined with fusible ring 6.

[0043] Working principle: insert two different steel pipes from both sides of the welding machine 1 into the welding machine 1, and put the fusible ring 6 on one of the instrument tubes in advance, then open the sealing cover 2 and move the instrument tube to the middle for contact, and then close the sealing cover 2, so that the instrument tube can be welded in a closed environment, and then the driving mechanism drives the rotating wheel 3 to rotate, and at the same time, the welding head 4 welds the fusible ring 6. The contact point of the two instrument tubes will form an I-type groove, and the I-type groove plus the fusible ring 6 will be self-melted and the weld will be raised, thus meeting the regulations and specifications. At the same time, the fusible ring 6 can also increase the direct welding area of ​​the instrument tube, realizing the closed full-position TIG automatic argon arc welding combined with the new process of fusible ring 6, overcoming the problem that the weld surface of the weld may be lower than the base material due to the closed full-position TIG automatic argon arc welding without wire addition, so that the weld joint can meet the power station welding regulations and specifications;

[0044] Since after the fusible ring 6 is put on the instrument tube, it is still necessary to manually move the fusible ring 6 to the connection of the instrument tube, and the operation of the entire welding process is too troublesome, the fusible ring 6 can be put on one of the instrument tubes through the above mechanism, and then the fusible ring 6 is placed in the welding machine 1, and then the electric telescopic rod 7 can be started to move the output end of the electric telescopic rod 7, and at the same time, the positioning column 15 is driven to move with the help of the moving mechanism. At this time, the output end of the electric telescopic rod 7 and the positioning column 15 will move close to each other, and finally the fusible ring 6 will be clamped at the connection of the instrument tube, thereby achieving the effect of automatically positioning the fusible ring 6, improving the convenience of welding the instrument tube, and then the output end of the electric telescopic rod 7 and the positioning column 15 is reset, and then the welding head 4 can be used to weld the instrument tube; when the output end box of the electric telescopic rod 7 is close to one end of one side of the rotating wheel 3, it will drive the connecting rod 12 to move together. At this time, the moving rod will drive the pressure plate 11 to squeeze the elastic block 10, so that the gas in the elastic block 10 enters the connecting column 9 from the hose 8 and pushes the positioning column 15. At this time, the positioning column 15 will move synchronously with the output end of the electric telescopic rod 7, thereby clamping the fusible ring 6 at the connection of the instrument tube. Through the above mechanism, the positioning column 15 can be synchronously driven to move when the output end of the electric telescopic rod 7 moves, without the need to add other power mechanisms to drive the positioning column 15 to move, saving resources;

[0045] By opening the sealing cover 2, the push rod 13 is separated from the storage sleeve 14, and then the fusible ring 6 is stored in the storage sleeve 14. At this time, the protrusion 17 will limit the fusible ring 6, and then close the sealing cover 2. After that, when the instrument tube enters the welding machine 1, all the fusible rings 6 will be sleeved on the instrument tube. At this time, the electric telescopic rod 7 is started, and the output end of the electric telescopic rod 7 is moved to the side close to the push rod 13. At this time, the push rod 13 will push the fusible ring 6, so that the front fusible ring 6 is separated from the storage sleeve 14, and the remaining It will be limited by the protrusion 17. When the fusible ring 6 passes the protrusion 17, the protrusion 17 will be squeezed and deformed into the groove 16. At this time, the protrusion 17 can also limit the fusible ring 6. Then, the output end of the electric telescopic rod 7 is moved toward the side of the rotating wheel 3. At this time, the fusible ring 6 separated from the storage sleeve 14 will still be pushed by the storage sleeve 14 until it moves to the connection of the instrument tube. Then, the storage sleeve 14 is moved away from the rotating wheel 3. The fusible ring 6 can be stored through the above mechanism, thereby achieving the function of automatic loading and unloading.

[0046] Due to the different diameters of different instrument tubes, the installation ring 15 cannot be adapted to all instrument tubes. At this time, a suitable connecting ring can be selected according to actual needs. When the second connecting ring 19 is needed, the round rod 23 on the first connecting ring 18 can be rotated to allow the fixing block 21 on the first connecting ring 18 to rotate in the annular groove 26 to the connecting groove 22, and then the round rod 23 can be pulled to allow the fixing block 21 to be disengaged from the annular groove 26 and the connecting groove 22, thereby removing the first connecting ring 18. At this time, the second connecting ring 19 can be used to limit the instrument tube, and the instrument tube will pass through the inner wall of the second connecting ring 19. Repeat the above operation when the third connecting ring 20 needs to be used. When the first connecting ring 18 needs to be installed, it is only necessary to move the fixing block 21 is installed in the connecting groove 22, and then enters the annular groove 26. Then, the first connecting ring 18 is rotated to move the fixing block 21 away from the connecting groove 22. At this time, the annular groove 26 will limit the first connecting ring 18. Different connecting rings can be used through the above mechanism, so as to facilitate the limiting of instrument pipes of different diameters; since the welding machine 1 is used in daily life, the staff may accidentally touch the round rod 23, causing the fixing block 21 to detach from the annular groove 26, thereby affecting the welding work of the instrument pipe. At this time, the round rod 23 can be limited by the limiting groove on the positioning plate 24 to prevent the connecting ring from rotating incorrectly. When the connecting ring needs to be rotated, the positioning plate 24 can be moved upward so that the limiting groove no longer limits the round rod 23.

[0047] The above-mentioned front, back, left, right, up and down are all based on the Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0049] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A stainless steel instrument tube welding device, characterized by: The invention comprises a welding machine (1), a driving wheel, an instrument tube and a fusible ring (6); a sealing cover (2) is provided on the welding machine (1); a driving mechanism drives a rotating wheel (3) to rotate in the sealing cover (2); a welding head (4) is fixedly installed on the inner side wall of the rotating wheel (3); semicircular grooves are provided on both sides of the sealing cover (2) and the welding machine (1); a mounting ring (5) is fixedly connected to the inner wall of the semicircular groove on the welding machine (1); a central portion of the mounting ring (5) can be used to limit the position of the instrument tube; and the fusible ring (6) is sleeved on the instrument tube; The inner wall of the mounting ring (5) is fixedly connected to a first connecting ring (18), the inner wall of the first connecting ring (18) is covered with a second connecting ring (19), and the inner wall of the second connecting ring (19) is covered with a third connecting ring (20). The inner walls of the first connecting ring (18) and the second connecting ring (19) are both provided with an annular groove (26). The outer walls of the second connecting ring (19) and the third connecting ring (20) are both fixedly connected to a fixing block (21) that is slidably connected to the annular groove (26). The first connecting ring (18) and the second connecting ring (19) are both provided with a connecting groove (22) that is connected to the annular groove (26) on the side away from the rotating wheel (3). The first connecting ring (18), the second connecting ring (19) and the third connecting ring (20) are all fixedly connected to a connecting rod (12) on the side away from the rotating wheel (3). An electric telescopic rod (7) is fixedly connected to one side of the inner wall of the welding machine (1) via a bracket, and an output end of the electric telescopic rod (7) is fixedly connected to a storage sleeve (14) via a bracket. The inner wall of the storage sleeve (14) is provided with a plurality of grooves (16), and the inner wall of the groove (16) is fixedly connected to a hollow and elastic protrusion (17). The fusible ring (6) is stored in the storage sleeve (14), and a push rod (13) for pushing the fusible ring (6) is slidably connected to the side of the storage sleeve (14) away from the rotating wheel (3), and the end of the push rod (13) away from the fusible ring (6) is fixedly connected to the inner wall of the sealing cover (2); By opening the sealing cover (2), the push rod (13) is separated from the storage sleeve (14), and then the fusible ring (6) is stored in the storage sleeve (14). At this time, the protrusion (17) will limit the fusible ring (6), and then close the sealing cover (2). After that, when the instrument tube enters the welding machine (1), all the fusible rings (6) will be sleeved on the instrument tube. At this time, the electric telescopic rod (7) is started, and the output end of the electric telescopic rod (7) is moved to the side close to the push rod (13). At this time, the push rod (13) pushes the fusible ring (6), so that the front fusible ring (6) is separated from the storage sleeve (14), and the remaining The rest will be limited by the protrusion (17). When the fusible ring (6) passes through the protrusion (17), the protrusion (17) will be squeezed and deformed into the groove (16). At this time, the protrusion (17) can also limit the fusible ring (6). Then, the output end of the electric telescopic rod (7) is moved toward the side of the rotating wheel (3). At this time, the fusible ring (6) separated from the storage sleeve (14) will still be pushed by the storage sleeve (14) until it moves to the connection of the instrument tube. Then, the storage sleeve (14) is moved away from the rotating wheel (3). The fusible ring (6) can be stored through the above mechanism, thereby achieving the function of automatic loading and unloading.

2. A stainless steel instrument tube welding device according to claim 1, characterized in that: One side of the inner wall of the welding machine (1) is fixedly connected to an electric telescopic rod (7) via a bracket, and one side of the inner wall of the welding machine (1) corresponding to the electric telescopic rod (7) is fixedly connected to a connecting column (9) via a bracket, a positioning column (15) is slidably connected inside the connecting column (9), and a moving mechanism for driving the positioning column (15) to move is provided in the welding machine (1).

3. The stainless steel instrument tube welding device according to claim 2, characterized in that: The moving mechanism comprises a hollow elastic block (10), the elastic block (10) being fixedly connected to the inner wall of the welding machine (1) near the connecting column (9), a hose (8) being connected between the elastic block (10) and the interior of the connecting column (9), a resetting elastic member being provided between the positioning column (15) and the inner wall of the connecting column (9), the output end of the electric telescopic rod (7) being fixedly connected to the connecting rod (12), and the end of the connecting rod (12) away from the electric telescopic rod (7) being fixedly connected to the pressing plate (11) for squeezing the elastic block (10).

4. The stainless steel instrument tube welding device according to claim 1, characterized in that: A positioning plate (24) is slidably connected to one side of the mounting ring (5) close to the round rod (23), and a limiting groove that fits the round rod (23) is provided on the bottom surface of the positioning plate (24).

5. The stainless steel instrument tube welding device according to claim 2, characterized in that: One end of the positioning column (15) close to the electric telescopic rod (7) is fixedly connected to a pressure sensor (25), and the pressure sensor (25) controls the electric telescopic rod (7) through a controller.

6. A stainless steel instrument tube welding process, the process using the stainless steel instrument tube welding device according to any one of claims 1 to 5, characterized in that: The process includes the following steps: S1: Open the sealing cover (2) and store the fusible ring (6) in the storage sleeve (14). The protrusion (17) will limit the fusible ring (6). Then close the sealing cover (2) to allow the instrument tube to be welded in a closed environment. Then, insert the two instrument tubes into the first connecting rings (18) on both sides respectively, and make the instrument tubes contact each other. S2: Start the electric telescopic rod (7) and move the output end of the electric telescopic rod (7) toward the side close to the push rod (13). At this time, the push rod (13) pushes the fusible ring (6), so that the front fusible ring (6) is separated from the storage sleeve (14); S3: The electric telescopic rod (7) is started again, and the output end of the electric telescopic rod (7) moves toward one side of the rotating wheel (3). At this time, the fusible ring (6) separated from the storage sleeve (14) will still be pushed by the storage sleeve (14) until it moves to the connection point of the instrument tube; S4: Then, the output end of the electric telescopic rod (7) drives the storage sleeve (14) away from the rotating wheel (3), and then the welding head (4) is used to weld the fusible ring (6) and the instrument tube. The welding time is 1 min to 2 min.

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