Positioning and clamping device for pipe welding

Abstract

This invention discloses a positioning and clamping device for pipe welding, relating to the field of pipe welding technology. The clamping device includes a base, a working platform mounted on the base, a support assembly slidably mounted on the working platform, and a clamping unit mounted on the support assembly. A base is slidably mounted on the working platform, and a turntable is rotatably mounted on the base. A groove is formed on the turntable, and a connecting part is slidably mounted within the groove. A telescopic component is mounted on the connecting part, and a mounting seat is mounted on the telescopic component. The clamping unit is rotatably mounted on the mounting seat. A fixing assembly is mounted at the bottom of the base. By installing and adjusting the position of the support assembly, the clamping unit can be moved to an appropriate position. The position can be further adjusted by allowing the telescopic component to slide within the groove along with the connecting part. The direction of the mounting seat can be adjusted by rotating the turntable. The relative rotation between the clamping unit and the mounting seat, as well as the height adjustment by the telescopic component, enable multi-degree-of-freedom positioning and clamping of the clamping component and facilitate easy adjustment.

Description

Technical Field

[0001] This invention relates to the field of pipeline welding technology, specifically a positioning and clamping device for pipeline welding. Background Technology

[0002] The transport of gases, liquids, or fluids containing solid particles requires a complete transport channel, which in turn needs to be formed by connecting and fixing multiple pipes to create a complete pipeline structure. Pipe welding is often one of the most cost-effective methods for connecting multiple pipe segments. During pipe welding, the two pipe segments to be welded need to be positioned to ensure that the welding accuracy meets the requirements.

[0003] Traditional pipe clamping structures typically require adjusting the positions of multiple clamping components and fixing them to a base plate with bolts or locating pins when clamping complex pipe structures. This is cumbersome to disassemble and adjust, with low flexibility. In addition, because the base plate is full of positioning holes, it is difficult to clean the weld that falls into the base plate. In pipes with many bends, existing clamping components generally clamp the bends with line contact, which cannot effectively clamp the bends. Summary of the Invention

[0004] The purpose of this invention is to provide a positioning and clamping device for pipe welding to solve the problems mentioned in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: the clamping device includes a base, a working platform is mounted on the base, a support component is slidably mounted on the working platform, and a clamping unit is provided on the support component; The support components include a base, turntable, slide, connector, telescopic component, and mounting base; A base is slidably mounted on the work platform, and a turntable is rotatably mounted on the base. A groove is opened on the turntable, and a connecting part is slidably mounted in the groove. A telescopic component is mounted on the connecting part, and a mounting seat is mounted on the telescopic component. A clamping unit is rotatably mounted on the mounting seat. A fixing component is mounted on the bottom of the base. When multiple pipe fittings need to be welded together, the clamping unit is moved to the appropriate position by installing and adjusting the position of the support component. The position is further adjusted by allowing the telescopic component to slide in the groove with the connecting part. The direction of the mounting seat is adjusted by rotating the telescopic component driven by the turntable. The relative rotation between the clamping unit and the mounting seat, as well as the height adjustment of the telescopic component, are used to adapt to the welding of pipes whose axes are not on the same plane, thereby realizing multi-degree-of-freedom positioning and clamping of the clamping components and convenient adjustment.

[0006] As a preferred technical solution, the fixing component includes a sliding sleeve, a sliding rod, a sliding hole, a push rod, a fitting part, and a resetting part; The base has a sliding hole inside, one end of which penetrates the side wall of the base. A push rod is slidably installed inside the sliding hole. A sliding sleeve is installed at the bottom of the base, and the inner hole of the sliding sleeve is connected to the sliding hole. A sliding rod is slidably installed inside the sliding sleeve, and a fitting part is installed at the bottom of the sliding rod. Reset parts are provided at the contact points between the sliding rod and the sliding sleeve, and between the push rod and the sliding hole. The contact ends of the sliding rod and the push rod are both wedge-shaped surfaces. When the base is adjusted, the push rod is pressed to slide into the sliding hole. At this time, the wedge-shaped surface of the push rod contacts the wedge-shaped surface of the sliding rod, and the sliding rod is pressed down. At this time, the sliding rod drives the fitting part to disengage from the bottom surface of the support plate, thereby adjusting the position of the base. After the position is adjusted, it is reset by the reset parts.

[0007] As a preferred technical solution, the clamping unit is an elbow clamping assembly, which includes an adjusting plate, a mounting groove, a rotating groove, a rotating rod, a mounting platform, a mounting rod, a mounting block, a placement groove, a rotating shaft, a thread, a moving block, and a clamping jaw. An adjusting plate is rotatably mounted on the mounting base. The adjusting plate has a mounting groove, and symmetrically positioned around the mounting groove are rotating grooves. A rotating rod is rotatably mounted within these grooves, and a mounting platform is mounted on the rotating rod. An mounting rod is slidably mounted on the mounting platform, and a mounting block is mounted on the mounting rod. A placement groove is provided on the mounting block. Rotating shafts are rotatably mounted in both the placement groove and the mounting groove. Two threads with opposite directions are provided at both ends of the rotating shaft, and symmetrically slidably mounted on the rotating shaft are movable blocks. Clamps are mounted on the movable blocks. When there is an elbow in the welded pipe fitting, it is clamped using an elbow clamping assembly. First, the clamps in the mounting groove initially clamp the pipe. Then, by rotating the mounting platform, the angle is changed so that the center of the elbow is on the axis of the mounting rod or the angle of offset between them is reduced. Then, the mounting rod is pushed closer to the elbow so that the clamps grip it, thus creating surface contact between the clamps and the elbow, avoiding the line contact clamping of traditional clamps. Rotatable bolts can be mounted on the clamps to adjust the clamping radius.

[0008] As a preferred technical solution, the adjusting plate includes a middle plate, an extension plate, a sliding plate, positioning holes, mounting holes, and limit pins; A middle plate is rotatably mounted on the mounting base. The middle plate has a cavity that runs through both sides. A sliding plate is symmetrically slidably mounted in the cavity. The sliding plate has multiple positioning holes. An extension plate is mounted on the sliding plate. The middle plate has a mounting hole. A limit pin is slidably mounted in the mounting hole. When there is an elbow in the welded pipe fitting, the distance between the extension plates can be adjusted, thereby indirectly adjusting the distance between the two side jaws and the middle jaw to cooperate with the rotating mounting table to adjust the angle, thus adapting to different elbows.

[0009] As a preferred technical solution, the clamping unit is a straight pipe clamping assembly, which includes a mounting plate, an adjusting groove, a threaded rod, a connecting plate, a lower clamp, and an upper clamp. A mounting plate is rotatably mounted on the mounting base. A lower clamp is mounted on the bottom of the mounting plate, and an adjustment groove is provided on the mounting plate. A threaded rod is rotatably mounted in the adjustment groove, and a connecting plate is slidably mounted on the threaded rod. An upper clamp is mounted on the connecting plate. When clamping a straight pipe, the upper and lower clamps are engaged by rotating the threaded rod. Rotatable bolts can be installed on the upper and lower clamps to adjust the clamping radius.

[0010] As a preferred technical solution, the working platform includes a support rod and a support plate; Multiple support rods are evenly arranged on the base, and support plates are installed on the top of the support rods. The multiple support plates form a working platform, and the gaps between the multiple support plates form crisscrossing slides. Limiting teeth are installed on the contact surfaces of the fitting part and the support plates. When clamping pipe fittings, the bottom of the base is made slightly higher than the support plate from the edge of the base, and the fixing component at its bottom passes through the slide and is then pushed in. At this time, the support component is installed. The base can only slide within the slide by sliding the connecting part in the slide groove. When the solder falls onto the support plate during the welding process, since there is a support rod between the support plate and the base, cleaning it into the slide groove does not affect the use, thus facilitating cleaning. The friction between the fitting part and the bottom surface of the support plate is increased by adding limiting teeth.

[0011] As a preferred technical solution, the reset component includes a guide groove, a guide rod, a reset spring, a connecting block, and a locking rod; Guide grooves are provided on both the sliding rod and the sliding hole. A guide rod is installed in the guide groove. A connecting block is slidably installed on the guide rod, and a return spring is sleeved on the guide rod. The two ends of the return spring are connected to the connecting block and the side wall of the guide groove, respectively. A locking rod is installed on the connecting block. A locking groove is provided on both the sliding sleeve and the push rod. The locking rod is locked in the locking groove. When the push rod is pressed, the sliding sleeve restricts the movement of the connecting block, and the push rod drives the connecting block to move, compressing the return spring. After the position adjustment is completed, the push rod loses force and resets through the return spring. The mating part re-fits with the bottom surface of the support plate, relying on the weight of the support assembly and the straight pipe clamping assembly or the elbow clamping assembly, as well as the clamping of the mating part and the base for fixation.

[0012] As a preferred technical solution, the turntable is symmetrically provided with circular holes, and a positioning rod is slidably installed in the circular holes. An insert is installed at the bottom of the positioning rod, and an enlarged hole is provided at the circular hole directly above the insert. Multiple slots are provided in the circumferential direction on the contact surface between the base and the bottom of the turntable. When the clamping direction needs to be adjusted, the positioning rod is lifted to disengage the insert from the slot. At this time, the turntable is rotated to adjust the direction, and then the insert is re-inserted into the slot for positioning.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. During installation, the base is positioned slightly higher than the support plate and at the edge of the base. The fixing component at its bottom passes through the slide rail and is then pushed in, completing the installation of the support component. The position is further adjusted by allowing the telescopic component to slide within the slide rail, thus compensating for the base's limitation to sliding only within the slide rail. The direction of the mounting base is adjusted by rotating the telescopic component via a turntable. The relative rotation between the clamping unit and the mounting base, along with the height adjustment of the telescopic component, accommodates pipe welding where the axes are not on the same plane, enabling multi-degree-of-freedom positioning and clamping of the clamping component and facilitating adjustment. When solder falls onto the support plate during welding, it can be cleaned into the slide rail without affecting use, as there is a support rod between the support plate and the base, making cleaning convenient.

[0014] 2. In this application, when clamping the elbow, the pipe is initially clamped by the jaws in the mounting groove. Then, the angle is changed by rotating the mounting table, so that the center of the elbow is located on the axis of the mounting rod or the angle of offset between the two is reduced. Then, the mounting rod is pushed to bring it closer to the elbow so that the jaws can clamp it, so that the jaws fit against the elbow and make surface contact, avoiding the line contact clamping of traditional clamps. Rotatable bolts can be installed on the jaws to adjust the clamping radius. By adjusting the distance between the extension plates, the distance between the two side jaws and the middle jaw can be indirectly adjusted to cooperate with the rotation of the mounting table to adjust the angle and adapt to different elbows. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall first-view structure of the present invention; Figure 2 This is a schematic diagram of the overall second-view structure of the present invention; Figure 3 This is a schematic diagram of the support component structure of the present invention; Figure 4 This is a schematic diagram of a first partial cross-sectional structure of the support component of the present invention; Figure 5 This is a schematic diagram of the second partial cross-sectional structure of the support component of the present invention; Figure 6 This is a schematic diagram of the elbow clamping assembly structure of the present invention; Figure 7 This is a schematic diagram of a first partial cross-sectional structure of the elbow clamping assembly of the present invention; Figure 8 This is a schematic diagram of the second partial cross-sectional structure of the elbow clamping assembly of the present invention; Figure 9 This is a schematic diagram of a partial structure of the working platform of the present invention; Figure 10 for Figure 5 Enlarged structural diagram at point A; Figure 11 This is a half-sectional view of the straight pipe clamping assembly of the present invention.

[0016] In the diagram: 1. Base; 101. Working platform; 102. Support rod; 103. Support plate; 104. Slide rail; 105. Limiting tooth; 2. Support assembly; 201. Base; 202. Turntable; 2021. Slide groove; 2022. Circular hole; 203. Connecting part; 204. Telescopic component; 205. Mounting seat; 206. Sliding sleeve; 207. Sliding rod; 208. Sliding hole; 209. Push rod; 210. Fitting part; 211. Reset component; 212. Guide groove; 213. Guide rod; 214. Reset spring; 215. Connecting block; 216. Locking rod; 217. Positioning rod; 218. Insert piece; 219. Slot; 3. Straight pipe clamping assembly; 301. Mounting plate; 302. Adjustment groove; 303. Threaded rod; 304. Connecting plate; 305. Lower clamp; 306. Upper clamp; 4. Elbow clamping assembly; 401. Adjustment plate; 4011. Intermediate plate; 4012. Extension plate; 4013. Slide plate; 4014. Positioning hole; 4015. Mounting hole; 4016. Limit pin; 402. Mounting groove; 403. Rotary groove; 404. Rotating rod; 405. Mounting platform; 406. Mounting rod; 407. Mounting block; 408. Placement groove; 409. Rotating shaft; 4091. Thread; 410. Moving block; 411. Clamping jaw. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example 1: As Figures 1-5 As shown, the clamping device includes a base 1, a working platform 101 is mounted on the base 1, a support component 2 is slidably mounted on the working platform 101, and a clamping unit is provided on the support component 2. The support assembly 2 includes a base 201, a turntable 202, a slide 2021, a connecting part 203, a telescopic part 204, and a mounting base 205; A base 201 is slidably mounted on the work platform 101, and a turntable 202 is rotatably mounted on the base 201. A groove 2021 is provided on the turntable 202, and a connecting part 203 is slidably mounted in the groove 2021. A telescopic component 204 is mounted on the connecting part 203, and a mounting seat 205 is mounted on the telescopic component 204. A clamping unit is rotatably mounted on the mounting seat 205. A fixing component is mounted on the bottom of the base 201. When multiple pipe fittings need to be welded together, the clamping unit is moved to the appropriate position by installing and adjusting the position of the support component 2. The position is further adjusted by allowing the telescopic component 204 to slide in the groove 2021 with the connecting part 203. The direction of the mounting seat 205 is adjusted by rotating the telescopic component 204 driven by the turntable 202. The relative rotation between the clamping unit and the mounting seat 205 and the height adjustment of the telescopic component 204 are used to adapt to the welding of pipes whose axes are not on the same plane, thereby realizing multi-degree-of-freedom positioning and clamping of the clamping components and convenient adjustment.

[0019] like Figure 5 As shown, the fixing assembly includes a sliding sleeve 206, a sliding rod 207, a sliding hole 208, a push rod 209, a fitting part 210, and a reset member 211; A sliding hole 208 is provided inside the base 201. One end of the sliding hole 208 penetrates the side wall of the base 201, and a push rod 209 is slidably installed inside the sliding hole 208. A sliding sleeve 206 is installed at the bottom of the base 201, and the inner hole of the sliding sleeve 206 is connected to the sliding hole 208. A sliding rod 207 is slidably installed inside the sliding sleeve 206. A fitting part 210 is installed at the bottom of the sliding rod 207. Reset points are provided at the contact points between the sliding rod 207 and the sliding sleeve 206, and at the contact points between the push rod 209 and the sliding hole 208. The contact ends of component 211, slide rod 207, and push rod 209 are all wedge-shaped surfaces. When the base 201 is adjusted, the push rod 209 is pressed to slide into the sliding hole 208. At this time, the wedge-shaped surface of the push rod 209 contacts the wedge-shaped surface of the slide rod 207, and the slide rod 207 is pressed down. At this time, the slide rod 207 drives the fitting part 210 to disengage from the bottom surface of the support plate 103, thereby adjusting the position of the base 201. After the position is adjusted, it is reset by the reset component 211.

[0020] like Figures 6-8 As shown, the clamping unit is the elbow clamping assembly 4, which includes an adjusting plate 401, a mounting groove 402, a rotating groove 403, a rotating rod 404, a mounting platform 405, a mounting rod 406, a mounting block 407, a placement groove 408, a rotating shaft 409, a thread 4091, a moving block 410, and a gripper 411. An adjusting plate 401 is rotatably mounted on the mounting base 205. The adjusting plate 401 has a mounting groove 402, and symmetrically arranged rotating grooves 403 about the mounting groove 402. A rotating rod 404 is rotatably mounted in the rotating groove 403. A mounting platform 405 is mounted on the rotating rod 404. A mounting rod 406 is slidably mounted on the mounting platform 405. A mounting block 407 is mounted on the mounting rod 406. A placement groove 408 is formed on the mounting block 407. A rotating shaft 409 is rotatably mounted in both the placement groove 408 and the mounting groove 402. Two threads 4091 with opposite directions of rotation are formed at both ends of the rotating shaft 409, and the rotating shaft 409 is symmetrically arranged... A sliding block 410 is installed, and a clamp 411 is installed on the sliding block 410. When there is an elbow in the welded pipe fitting, it is clamped by the elbow clamping assembly 4. First, the pipe is initially clamped by the clamp 411 in the mounting groove 402. Then, the angle is changed by rotating the mounting table 405 so that the center of the elbow is located on the axis of the mounting rod 406 or the angle of offset between the two is reduced. Then, the mounting rod 406 is pushed to move it close to the elbow so that the clamp 411 clamps it, so that the clamp 411 fits against the elbow to make surface contact, avoiding the line contact clamping of traditional clamps. A rotatable bolt can be installed on the clamp 411 to adjust the clamping radius.

[0021] The adjusting plate 401 includes a middle plate 4011, an extension plate 4012, a sliding plate 4013, a positioning hole 4014, a mounting hole 4015, and a limiting pin 4016; A middle plate 4011 is rotatably mounted on the mounting base 205. The middle plate 4011 has a cavity that runs through both sides. A sliding plate 4013 is symmetrically slidably mounted in the cavity. Multiple positioning holes 4014 are opened on the sliding plate 4013. An extension plate 4012 is mounted on the sliding plate 4013. A mounting hole 4015 is opened on the middle plate 4011. A limit pin 4016 is slidably mounted in the mounting hole 4015. When there is an elbow in the welded pipe fitting, the distance between the extension plates 4012 can be adjusted to indirectly adjust the distance between the two side clamps 411 and the middle clamp 411 to cooperate with the rotating mounting table 405 to adjust the angle, thereby adapting to different elbows.

[0022] like Figure 1 , Figure 2 and Figure 9 As shown, the working platform 101 includes a support rod 102 and a support plate 103; Multiple support rods 102 are evenly arranged on the base 1. Support plates 103 are mounted on the top of the support rods 102. The multiple support plates 103 form a working platform 101, and the gaps between the multiple support plates 103 form crisscrossing slide tracks 104. Limiting teeth 105 are installed on the contact surfaces of the fitting part 210 and the support plates 103. When clamping pipe fittings, the bottom of the base 201 is slightly higher than the support plates 103 from the edge of the base 1, and the fixing components at its bottom pass through the slide tracks. The support assembly 2 is installed by sliding the connecting part 203 in the slide groove 2021, which compensates for the fact that the base 201 can only slide in the slide groove 104. When the solder falls onto the support plate 103 during the welding process, since there is a support rod 102 between the support plate 103 and the base 1, cleaning it into the slide groove 104 will not affect the use, thus making it easy to clean. The friction between the fitting part 210 and the bottom surface of the support plate 103 is increased by adding the limiting tooth 105.

[0023] like Figure 5 and Figure 10 As shown, the reset component 211 includes a guide groove 212, a guide rod 213, a reset spring 214, a connecting block 215, and a locking rod 216; Both the slide rod 207 and the slide hole 208 are provided with guide grooves 212. A guide rod 213 is installed in the guide groove 212. A connecting block 215 is slidably installed on the guide rod 213, and a return spring 214 is sleeved on the guide rod 213. The two ends of the return spring 214 are connected to the connecting block 215 and the side wall of the guide groove 212, respectively. A locking rod 216 is installed on the connecting block 215. Both the slide sleeve 206 and the push rod 209 are provided with locking grooves. The locking rod 216 locks... Within the slot, when the push rod 209 is pressed, the sliding sleeve 206 restricts the movement of the connecting block 215, and the push rod 209 drives the connecting block 215 to move, both compressing the return spring 214. After the position adjustment is completed, the push rod 209 loses force and resets through the return spring 214, and the mating part 210 re-matures with the bottom surface of the support plate 103, relying on the weight of the support assembly 2 and the straight pipe clamping assembly 3 or the elbow clamping assembly 4, as well as the clamping and fixing of the mating part 210 and the base 201.

[0024] like Figure 4 As shown, the turntable 202 has symmetrically arranged circular holes 2022. A positioning rod 217 is slidably installed in the circular hole 2022. An insert 218 is installed at the bottom of the positioning rod 217. An enlarged hole is opened at the circular hole 2022 directly above the insert 218. Multiple slots 219 are opened in the circumferential direction on the contact surface between the base 201 and the bottom of the turntable 202. When the clamping direction needs to be adjusted, the positioning rod 217 is lifted to disengage the insert 218 from the slot 219. At this time, the turntable 202 is rotated to adjust the direction, and then the insert 218 is re-inserted into the slot 219 for positioning.

[0025] Example 2: The main difference between this example and Example 1 lies in the clamping unit; like Figure 1 , Figure 2 and Figure 11 As shown, the clamping unit is a straight pipe clamping assembly 3, which includes a mounting plate 301, an adjusting groove 302, a threaded rod 303, a connecting plate 304, a lower clamp 305, and an upper clamp 306. A mounting plate 301 is rotatably mounted on the mounting base 205. A lower clamp 305 is mounted on the bottom of the mounting plate 301, and an adjustment groove 302 is provided on the mounting plate 301. A threaded rod 303 is rotatably mounted in the adjustment groove 302. A connecting plate 304 is slidably mounted on the threaded rod 303, and an upper clamp 306 is mounted on the connecting plate 304. When clamping a straight pipe, the connecting plate 304 is driven by rotating the threaded rod 303 to engage the upper clamp 306 and the lower clamp 305. Rotatable bolts can be installed on the upper clamp 306 and the lower clamp 305 to adjust the clamping radius.

[0026] Working principle of the invention: When multiple straight pipe fittings need to be welded together, the straight pipe clamping assembly 3 is installed on the support assembly 2, and the straight pipe clamping assembly 3 is moved to the appropriate position. By pressing the push rod 209, it slides into the sliding hole 208. At this time, the push rod 209 presses the sliding rod 207 downward, causing the fitting part 210 to separate from the bottom surface of the support plate 103 for easy movement. The connecting part 203 slides in the sliding groove 2021 to compensate for the base 201 being able to slide only in the slide track 104. At the same time, the position of the telescopic component 204 in the sliding groove 2021 is adjusted, and the telescopic component is driven by the turntable 202. 204 rotates to adjust the direction of the mounting base 205. When the plane formed by the axes of the two straight pipes is not parallel to the working platform 101, the angle of the mounting base 205 of the straight pipe clamping assembly 3 is adjusted by rotating it. Then, the threaded rod 303 is rotated to make the connecting plate 304 drive the upper clamp 306 and the lower clamp 305 to engage, thereby clamping the pipe fitting. When the pipe diameter changes beyond the clamping range, rotatable bolts can be installed on the upper clamp 306 and the lower clamp 305 to adjust the clamping radius, thereby enabling the clamping component to be positioned and clamped with multiple degrees of freedom and to be easily adjusted.

[0027] When the welded pipe fittings consist only of elbows, the elbow clamping assembly 4 is installed on the support assembly 2, and the position and orientation of the support assembly 2 are adjusted before clamping and positioning the elbow. When clamping the elbow, the pipe is initially clamped by the jaws 411 in the mounting groove 402. Then, the angle is changed by rotating the mounting table 405 so that the center of the elbow is located on the axis of the mounting rod 406 or the angle of their offset is reduced. Then, the mounting rod 406 is pushed closer to the elbow so that the jaws 411 clamp it, so that the jaws 411 fit against the elbow to make surface contact, avoiding the line contact clamping of traditional clamps. A rotatable bolt can be installed on the jaws 411 to adjust the clamping radius. At the same time, the distance between the extension plates 4012 can be adjusted to indirectly adjust the distance between the two jaws 411 and the middle jaw 411 to cooperate with the rotation of the mounting table 405 to adjust the angle, thereby adapting to different elbows.

[0028] When the welded pipe assembly contains both straight pipes and elbows, a support component 2 is set up according to the requirements. A straight pipe clamping component 3 and an elbow clamping component 4 are then set up on the support component 2. The position and direction of the support component 2 are then adjusted to clamp and position the elbows and straight pipes.

[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A positioning and clamping device for pipe welding, characterized in that: The clamping device includes a base (1), on which a working platform (101) is mounted, and a support assembly (2) is slidably mounted on the working platform (101), and a clamping unit is provided on the support assembly (2); The support assembly (2) includes a base (201), a turntable (202), a slide (2021), a connecting part (203), a telescopic component (204), and a mounting base (205). A base (201) is slidably mounted on the work platform (101), and a turntable (202) is rotatably mounted on the base (201). A slide groove (2021) is provided on the turntable (202), and a connecting part (203) is slidably mounted in the slide groove (2021). A telescopic component (204) is mounted on the connecting part (203), and a mounting seat (205) is mounted on the telescopic component (204). A clamping unit is rotatably mounted on the mounting seat (205), and a fixing component is mounted on the bottom of the base (201).

2. The positioning and clamping device for pipe welding according to claim 1, characterized in that: The fixing assembly includes a sliding sleeve (206), a sliding rod (207), a sliding hole (208), a push rod (209), a fitting part (210), and a reset member (211). The base (201) has a sliding hole (208) inside. One end of the sliding hole (208) passes through the side wall of the base (201), and a push rod (209) is slidably installed inside the sliding hole (208). A sliding sleeve (206) is installed at the bottom of the base (201). The inner hole of the sliding sleeve (206) is connected to the sliding hole (208). A sliding rod (207) is slidably installed inside the sliding sleeve (206). A fitting part (210) is installed at the bottom of the sliding rod (207). A reset part (211) is provided at the contact point between the sliding rod (207) and the sliding sleeve (206) and at the contact point between the push rod (209) and the sliding hole (208).

3. The positioning and clamping device for pipe welding according to claim 1, characterized in that: The clamping unit is an elbow clamping assembly (4), which includes an adjusting plate (401), a mounting groove (402), a rotating groove (403), a rotating rod (404), a mounting platform (405), a mounting rod (406), a mounting block (407), a placement groove (408), a rotating shaft (409), a thread (4091), a moving block (410), and a gripper (411). An adjusting plate (401) is rotatably mounted on the mounting base (205). An mounting groove (402) is provided on the adjusting plate (401), and rotating grooves (403) are symmetrically provided on the adjusting plate (401) about the mounting groove (402). A rotating rod (404) is rotatably mounted in the rotating groove (403). A mounting platform (405) is mounted on the rotating rod (404), and a mounting rod (406) is slidably mounted on the mounting platform (405). An installation block (407) is installed on (406). A placement groove (408) is provided on the installation block (407). A rotating shaft (409) is rotatably installed in both the placement groove (408) and the installation groove (402). Two threads (4091) with opposite directions are provided at both ends of the rotating shaft (409). A moving block (410) is symmetrically slidably installed on the rotating shaft (409). A gripper (411) is installed on the moving block (410).

4. The positioning and clamping device for pipe welding according to claim 3, characterized in that: The adjusting plate (401) includes a middle plate (4011), an extension plate (4012), a sliding plate (4013), a positioning hole (4014), a mounting hole (4015), and a limiting pin (4016). An intermediate plate (4011) is rotatably mounted on the mounting base (205). The intermediate plate (4011) has a cavity that runs through both sides. A sliding plate (4013) is symmetrically slidably mounted in the cavity. The sliding plate (4013) has multiple positioning holes (4014). An extension plate (4012) is mounted on the sliding plate (4013). The intermediate plate (4011) has mounting holes (4015). A limit pin (4016) is slidably mounted in the mounting holes (4015).

5. A positioning and clamping device for pipe welding according to claim 1, characterized in that: The clamping unit is a straight pipe clamping assembly (3), which includes a mounting plate (301), an adjusting groove (302), a threaded rod (303), a connecting plate (304), a lower clamp (305), and an upper clamp (306). A mounting plate (301) is rotatably mounted on the mounting base (205). A lower chuck (305) is mounted on the bottom of the mounting plate (301). An adjustment groove (302) is provided on the mounting plate (301). A threaded rod (303) is rotatably mounted in the adjustment groove (302). A connecting plate (304) is slidably mounted on the threaded rod (303). An upper chuck (306) is mounted on the connecting plate (304).

6. A positioning and clamping device for pipe welding according to claim 2, characterized in that: The working platform (101) includes a support rod (102) and a support plate (103); Multiple support rods (102) are evenly arranged on the base (1). Support plates (103) are installed on the top of the support rods (102). Multiple support plates (103) form a working platform (101). The multiple support plates (103) are spaced apart to form crisscrossing slides (104). Limiting teeth (105) are installed on the contact surface between the fitting part (210) and the support plate (103).

7. A positioning and clamping device for pipe welding according to claim 2, characterized in that: The reset component (211) includes a guide groove (212), a guide rod (213), a reset spring (214), a connecting block (215), and a locking rod (216). Guide grooves (212) are provided on both the slide rod (207) and the slide hole (208). A guide rod (213) is installed in the guide groove (212). A connecting block (215) is slidably installed on the guide rod (213). A return spring (214) is sleeved on the guide rod (213). The two ends of the return spring (214) are respectively connected to the connecting block (215) and the side wall of the guide groove (212). A locking rod (216) is installed on the connecting block (215). A locking groove is provided on both the slide sleeve (206) and the push rod (209). The locking rod (216) is locked in the locking groove.

8. A positioning and clamping device for pipe welding according to claim 1, characterized in that: The turntable (202) has symmetrically opened circular holes (2022), and a positioning rod (217) is slidably installed in the circular holes (2022). A insert (218) is installed at the bottom of the positioning rod (217). An enlarged hole is opened at the circular hole (2022) directly above the insert (218). Multiple slots (219) are opened in the circumferential direction on the contact surface between the base (201) and the bottom of the turntable (202).

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