Positioning clamp for heating pipe of water heater

Abstract

The invention relates to the technical field of positioning clamps, in particular to a water heater heating pipe positioning clamp which comprises a connecting plate, a connecting seat, a fixing structure, a driving structure, a supporting structure, a rotating structure, a heating pipe body and a supporting structure. Then the fixing structure can be driven by the driving structure to fix the heating pipe base plate, the fixing structure can drive the supporting structure to support the heating pipe base plate before the fixing structure makes contact with the heating pipe base plate, and then the fixing structure can continue to move to fix the heating pipe base plate; due to the fact that the connecting plate is arranged on the heating pipe body, a bent metal pipe on the heating pipe does not need to penetrate through the connecting plate when the heating pipe body is placed, the operation convenience is effectively improved, the heating pipe body can be disassembled and assembled during welding, the welding time is effectively shortened, and the machining efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of positioning jigs, and specifically relates to a positioning jig for a water heater heating pipe. Background Art

[0002] The water heater heating pipe converts electrical energy into heat energy to heat the water in the water tank, so that the water inside the water tank reaches an appropriate temperature. The water heater heating pipe mainly consists of a metal pipe, an electric heating wire located inside the metal pipe, and a heating pipe chassis for fixing the heating pipe. During the production of the heating pipe, it is necessary to fix the heating pipe chassis through a positioning jig and then weld between the metal pipe and the heating pipe chassis.

[0003] However, when the traditional positioning jig fixes the heating pipe, the metal pipe needs to pass through the positioning jig. Since the metal pipe has a bent structure, it takes a certain amount of time to move the metal pipe each time, which is not convenient for the quick placement and removal of the heating pipe, resulting in poor usability. And each time after a heating pipe is welded, it is necessary to stop the machine for a period of time to disassemble and install the heating pipe, which is not convenient for the disassembly and assembly of the heating pipe during welding, and will increase the welding time and reduce the processing efficiency. Summary of the Invention

[0004] In view of the problems in the prior art, the present invention provides a positioning jig for a water heater heating pipe.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a positioning jig for a water heater heating pipe, including a connecting plate, a connecting seat is fixedly connected to the connecting plate, a supporting structure is provided at the bottom end of the connecting seat, a rotating structure is provided on the supporting structure, a fixing structure is provided on the connecting plate, a driving structure is provided on the connecting plate, a lifting structure is provided on the connecting plate, and a heating pipe body is provided on the lifting structure; The fixing structure includes a rotating ring and a first guiding groove. Two rotating rings are rotatably connected to the connecting plate. Four first guiding grooves are provided on the rotating ring. Four sliders are provided on one side of the rotating ring. The sliders are slidably connected to the connecting plate. A first guiding shaft is fixedly connected to the slider. One end of the first guiding shaft extends into the first guiding groove and is slidably connected to the slider. One end of the slider is fixedly connected to a resisting block. The four resisting blocks are in contact with the same heating pipe body.

[0006] Specifically, the four first guiding grooves are circumferentially arrayed about the center of the rotating ring, and the cross-section between the slider and the resisting block is in an L-shaped structure.

[0007] Specifically, the connecting seat is arranged in the middle of the connecting plate, and the two rotating rings are symmetrically distributed about the middle of the connecting plate.

[0008] Specifically, the driving structure includes an electric push rod and a guide post. A guide post is fixedly connected to the connecting plate. A sliding seat is slidably connected to the guide post. A rack is fixedly connected to one side of the sliding seat. An incomplete gear is fixedly connected to the outer side of the rotating ring. The rack meshes with the incomplete gear.

[0009] Specifically, an electric push rod is installed on the connecting plate. The extending end of the electric push rod is fixedly connected to the sliding seat. The cross section of the end of the sliding seat is in an L-shaped structure.

[0010] Specifically, the lifting structure includes a rotating shaft and a dragging block. A rotating shaft is provided on one side of the sliding block. The rotating shaft is rotatably connected to the connecting plate. A dragging block is fixedly connected to one end of the rotating shaft. The four dragging blocks are in contact with the same heating tube body. A connecting piece is fixedly connected to the other end of the rotating shaft. A second guide shaft is fixedly connected to the connecting piece. A second guide groove is provided on the sliding block. One end of the second guide shaft extends into the second guide groove and is slidably connected to the sliding block. Two receiving grooves are provided on the connecting plate.

[0011] Specifically, the directions of both ends of the second guide groove are the same as the sliding direction of the sliding block, and there is a certain included angle between the direction of the middle part of the second guide groove and the sliding direction of the sliding block. The cross section between the rotating shaft and the dragging block is in an L-shaped structure.

[0012] Specifically, the supporting structure includes a support frame and a rotating rod. A support frame is provided at the bottom end of the connecting plate. A lead screw is rotatably connected to the support frame. A connecting sleeve is threadedly connected to the lead screw. The connecting sleeve is slidably connected to the support frame. Two guide bars are fixedly connected to the connecting sleeve. The guide bars are slidably connected to the support frame. A connecting seat is rotatably connected to the top end of the connecting sleeve. A bottom plate is fixedly connected to the bottom end of the support frame. A plurality of mounting holes are provided on the bottom plate.

[0013] Specifically, a rotating rod is fixedly connected to the bottom end of the lead screw. The rotating rod penetrates through the lead screw and is perpendicular to the lead screw.

[0014] Specifically, the rotating structure includes a mounting plate and a servo motor. A mounting plate is fixedly connected to the connecting sleeve. A servo motor is installed on the mounting plate. A first synchronous pulley is fixedly connected to the output shaft of the servo motor. A second synchronous pulley is fixedly connected to the connecting seat. A synchronous belt is wound between the first synchronous pulley and the second synchronous pulley.

[0015] The beneficial effects of the present invention are: A positioning fixture for a water heater heating tube according to the present invention can enable the heating tube chassis to pass through the connecting plate during use, and then the driving structure can drive the fixing structure to fix the heating tube chassis. Before the fixing structure contacts the heating tube chassis, the fixing structure will drive the lifting structure to lift the heating tube chassis, and then the fixing structure will continue to move to fix the heater chassis. Therefore, when placing the heating tube body, it is not necessary to pass the bent metal tube on the heating tube through the connecting plate, thereby effectively improving the operation convenience.

[0016] (2)A positioning fixture for a water heater heating tube according to the present invention can fix another heating tube body when one heating tube body is welded during use. After one heating tube body is welded, the connecting plate can be rotated through the rotating structure, so as to realize the position exchange of the two heating tube bodies, and thus the disassembly and assembly work of the heating tube body can be realized while welding, thereby effectively shortening the welding time and improving the processing efficiency.

[0017] (3)A positioning fixture for a water heater heating tube according to the present invention can support the connecting plate through the supporting structure, and can adjust the height of the connecting plate through the supporting structure, so as to conveniently adapt to welding devices of different heights, and thus effectively improve the use flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the drawings and embodiments.

[0019] Figure 1 It is a schematic structural diagram of the overall structure of a preferred embodiment of a positioning fixture for a water heater heating tube provided by the present invention; Figure 2 For Figure 1 the enlarged schematic view of part A shown; Figure 3 It is a schematic connection structure diagram of the connection frame and the card slot of the present invention; Figure 4 For Figure 3 the enlarged schematic view of part B shown; Figure 5 It is a schematic connection structure diagram of the lead screw and the connecting sleeve of the present invention; Figure 6 For Figure 5 the enlarged schematic view of part C shown; Figure 7 It is a schematic connection structure diagram of the slider and the second guide groove of the present invention; Figure 8 It is a schematic connection structure diagram of the connecting piece and the second guide shaft of the present invention.

[0020] In the figure: 1, connecting plate; 2, connecting seat; 3, fixing structure; 301, swivel; 302, first guide groove; 303, first guide shaft; 304, slider; 305, abutting block; 4, driving structure; 401, electric push rod; 402, guide post; 403, sliding seat; 404, rack; 405, incomplete gear; 5, lifting structure; 501, rotating shaft; 502, dragging block; 503, connecting piece; 504, second guide shaft; 505, second guide groove; 506, storage groove; 6, rotating structure; 601, mounting plate; 602, servo motor; 603, first synchronous pulley; 604, synchronous belt; 605, second synchronous pulley; 7, heating tube body; 8, supporting structure; 801, support frame; 802, rotating rod; 803, lead screw; 804, connecting sleeve; 805, guide strip; 806, bottom plate; 807, mounting hole. Detailed implementation mode

[0021] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation modes.

[0022] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 shown, a positioning fixture for a water heater heating tube according to the present invention includes a connecting plate 1, a connecting seat 2 is fixedly connected to the connecting plate 1, a supporting structure 8 is provided at the bottom end of the connecting seat 2, a rotating structure 6 is provided on the supporting structure 8, a fixing structure 3 is provided on the connecting plate 1, a driving structure 4 is provided on the connecting plate 1, a lifting structure 5 is provided on the connecting plate 1, and a heating tube body 7 is provided on the lifting structure 5; As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the fixing structure 3 includes a swivel ring 301 and a first guide groove 302. Two swivel rings 301 are rotatably connected to the connecting plate 1. Four first guide grooves 302 are provided on the swivel ring 301. Four sliders 304 are provided on one side of the swivel ring 301. The sliders 304 are slidably connected to the connecting plate 1. A first guide shaft 303 is fixedly connected to the slider 304. One end of the first guide shaft 303 extends into the first guide groove 302 and is slidably connected to the slider 304. One end of the slider 304 is fixedly connected to a resisting block 305. The four resisting blocks 305 are in contact with the same heating tube body 7. The four first guide grooves 302 are circumferentially arranged about the center of the swivel ring 301. The cross-section between the slider 304 and the resisting block 305 is in an L-shaped structure. The connecting seat 2 is arranged in the middle of the connecting plate 1. The two swivel rings 301 are symmetrically distributed about the middle of the connecting plate 1. The driving structure 4 includes an electric push rod 401 and a guide post 402. The guide post 402 is fixedly connected to the connecting plate 1. A sliding seat 403 is slidably connected to the guide post 402. A rack 404 is fixedly connected to one side of the sliding seat 403. An incomplete gear 405 is fixedly connected to the outer side of the swivel ring 301. The rack 404 meshes with the incomplete gear 405. An electric push rod 401 is installed on the connecting plate 1. The extending end of the electric push rod 401 is fixedly connected to the sliding seat 403. The cross-section of the end of the sliding seat 403 is in an L-shaped structure. The lifting structure 5 includes a rotating shaft 501 and a dragging block 502. A rotating shaft 501 is provided on one side of the slider 304. The rotating shaft 501 is rotatably connected to the connecting plate 1. One end of the rotating shaft 501 is fixedly connected to a dragging block 502. The four dragging blocks 502 are in contact with the same heating tube body 7. The other end of the rotating shaft 501 is fixedly connected to a connecting piece 503. A second guide shaft 504 is fixedly connected to the connecting piece 503. A second guide groove 505 is provided on the slider 304. One end of the second guide shaft 504 extends into the second guide groove 505 and is slidably connected to the slider 304. Two receiving grooves 506 are provided on the connecting plate 1. The directions of both ends of the second guide groove 505 are the same as the sliding direction of the slider 304. There is a certain included angle between the direction of the middle part of the second guide groove 505 and the sliding direction of the slider 304. The cross-section between the rotating shaft 501 and the dragging block 502 is in an L-shaped structure. That is, when it is necessary to fix the heating tube body 7, the heating tube body 7 can be held by hand and moved, and the heating tube chassis at the end of the heating tube body 7 can be passed through the connecting plate 1. Then, by starting the electric push rod 401, the elongation of the electric push rod 401 will drive the sliding seat 403 to slide on the guide post 402. The movement of the sliding seat 403 drives the rack 404 to move. The rack 404 drives the incomplete gear 405 to rotate. The incomplete gear 405 drives the swivel ring 301 to rotate. The swivel ring 301 drives the plurality of first guide grooves 302 to rotate.While the first guiding groove 302 moves, the first guiding shaft 303 will move inside the first guiding groove 302. While the first guiding shaft 303 moves inside the first guiding groove 302, the slider 304 will slide on the connecting plate 1. The movement of the slider 304 will drive the abutting block 305 to move, so that the four abutting blocks 305 will move towards the heating pipe body 7 at the same time. While the slider 304 moves, it will drive the second guiding groove 505 to move. While the second guiding groove 505 moves, the second guiding shaft 504 will move inside the second guiding groove 505. When the second guiding shaft 504 moves to the inclined position in the middle of the second guiding groove 505, as the second guiding shaft 504 continues to move inside the second guiding groove 505, the connecting piece 503 will rotate. The rotation of the connecting piece 503 will drive the rotating shaft 501 to rotate. The rotation of the rotating shaft 501 will drive the dragging block 502 to rotate. When the dragging block 502 rotates 90 degrees, the second guiding shaft 504 will move to the horizontal position of the second guiding groove 505. At this time, the heating pipe body 7 can be released. After the heating pipe body 7 is released, the heating pipe body 7 can be supported by multiple dragging blocks 502. Then the slider 304 will continue to move to drive the abutting block 305 to move towards the heating pipe body 7. When the four abutting blocks 305 are in contact with the heating pipe body 7 at the same time, the electric push rod 401 stops extending. At this time, the positioning and fixing of the heating pipe body 7 are realized. Since it is not necessary to pass the bent metal pipe on the heating pipe through the connecting plate 1 when placing the heating pipe body 7, the operation convenience is effectively improved.

[0023] Specifically, such as Figure 1 and Figure 5As shown in the figure, the support structure 8 includes a support frame 801 and a rotating rod 802. The bottom end of the connecting plate 1 is provided with a support frame 801. A lead screw 803 is rotatably connected to the support frame 801. A connecting sleeve 804 is threadedly connected to the lead screw 803. The connecting sleeve 804 is slidably connected to the support frame 801. Two guide bars 805 are fixedly connected to the connecting sleeve 804. The guide bars 805 are slidably connected to the support frame 801. The top end of the connecting sleeve 804 is rotatably connected to a connecting seat 2. The bottom end of the support frame 801 is fixedly connected to a bottom plate 806. A plurality of mounting holes 807 are provided on the bottom plate 806. The bottom end of the lead screw 803 is fixedly connected to a rotating rod 802. The rotating rod 802 penetrates through the lead screw 803 and is perpendicular to the lead screw 803. That is, during use, the bottom plate 806 can be installed and fixed through the plurality of mounting holes 807 in cooperation with bolts, thereby realizing the fixation of the device. When it is necessary to adjust the height of the connecting plate 1, the lead screw 803 can be rotated by the rotating rod 802. Since two guide bars 805 are fixedly connected to both ends of the connecting sleeve 804, the connecting sleeve 804 can be prevented from rotating, and at the same time, the connecting sleeve 804 can slide in its axial direction. Therefore, when the lead screw 803 rotates, the connecting sleeve 804 can be driven to slide on the support frame 801. The movement of the connecting sleeve 804 will drive the movement of the connecting seat 2, and the movement of the connecting seat 2 will drive the movement of the connecting plate 1, thereby realizing the adjustment of the height of the connecting plate 1, facilitating adaptation to welding devices of different heights, and effectively improving the flexibility of use.

[0024] Specifically, as Figure 1 and Figure 2 shown in the figure, the rotating structure 6 includes a mounting plate 601 and a servo motor 602. A mounting plate 601 is fixedly connected to the connecting sleeve 804. A servo motor 602 is mounted on the mounting plate 601. A first synchronous pulley 603 is fixedly connected to the output shaft of the servo motor 602. A second synchronous pulley 605 is fixedly connected to the connecting seat 2. A synchronous belt 604 is wound between the first synchronous pulley 603 and the second synchronous pulley 605. That is, during use, when one heating tube body 7 is being welded, the other heating tube body 7 can be fixed. After one heating tube body 7 is welded, the servo motor 602 is started. The output shaft of the servo motor 602 rotates to drive the first synchronous pulley 603 to rotate. The first synchronous pulley 603 drives the second synchronous pulley 605 to rotate through the synchronous belt 604. The second synchronous pulley 605 rotates to drive the connecting seat 2 to rotate. The connecting seat 2 rotates to drive the connecting plate 1 to rotate. When the connecting plate 1 rotates 180 degrees, the output shaft of the servo motor 602 stops rotating. At this time, the positions of the two heating tube bodies 7 are swapped, so that the disassembly and assembly work of the heating tube body 7 can be realized while welding, thereby effectively shortening the welding time and improving the processing efficiency.

[0025] When the present invention is in use, during the using process, the bottom plate 806 can be installed and fixed through a plurality of mounting holes 807 in cooperation with bolts, so as to realize the fixation of the device. When it is necessary to adjust the height of the connecting plate 1, the lead screw 803 can be rotated by the rotating rod 802. Since both ends of the connecting sleeve 804 are fixedly connected with two guide bars 805, the connecting sleeve 804 can be prevented from rotating, and at the same time, the connecting sleeve 804 can slide in its axial direction. Therefore, when the lead screw 803 rotates, the connecting sleeve 804 can be driven to slide on the support frame 801. The movement of the connecting sleeve 804 will drive the connecting seat 2 to move, and the movement of the connecting seat 2 will drive the connecting plate 1 to move, so as to realize the adjustment of the height of the connecting plate 1, which is convenient for adapting to welding devices of different heights, thus effectively improving the flexibility of use; During the use process, when one of the heating tube bodies 7 is being welded, the other heating tube body 7 can be fixed. When it is necessary to fix the heating tube body 7, the heating tube body 7 can be held by hand and moved, and the heating tube chassis at the end of the heating tube body 7 is passed through the connecting plate 1. Then, by starting the electric push rod 401, the elongation of the electric push rod 401 will drive the sliding seat 403 to slide on the guiding column 402. The movement of the sliding seat 403 drives the rack 404 to move, and the rack 404 drives the incomplete gear 405 to rotate. The incomplete gear 405 drives the rotating ring 301 to rotate, and the rotating ring 301 drives a plurality of first guiding grooves 302 to rotate. While the first guiding grooves 302 are moving, the first guiding shaft 303 will move inside the first guiding grooves 302. While the first guiding shaft 303 is moving inside the first guiding grooves 302, the slider 304 will slide on the connecting plate 1. The movement of the slider 304 drives the abutting block 305 to move, so that the four abutting blocks 305 move towards the heating tube body 7 simultaneously. While the slider 304 is moving, it will drive the second guiding groove 505 to move. While the second guiding groove 505 is moving, the second guiding shaft 504 will move inside the second guiding groove 505. When the second guiding shaft 504 moves to the inclined position in the middle of the second guiding groove 505, as the second guiding shaft 504 continues to move inside the second guiding groove 505, the connecting piece 503 will rotate. The rotation of the connecting piece 503 drives the rotating shaft 501 to rotate, and the rotation of the rotating shaft 501 drives the dragging block 502 to rotate. When the dragging block 502 rotates 90 degrees, the second guiding shaft 504 will move to the horizontal position of the second guiding groove 505. At this time, the heating tube body 7 can be released. After releasing the heating tube body 7, the heating tube body 7 can be supported by a plurality of dragging blocks 502. Then, the slider 304 will continue to move to drive the abutting block 305 to move towards the heating tube body 7. When the four abutting blocks 305 are in contact with the heating tube body 7 simultaneously, the electric push rod 401 stops elongating. At this time, the positioning and fixing of the heating tube body 7 are realized. Since it is not necessary to pass the bent metal tube on the heating tube through the connecting plate 1 when placing the heating tube body 7, the operation convenience is effectively improved. After one of the heating tube bodies 7 is welded, by starting the servo motor 602, the output shaft of the servo motor 602 rotates to drive the first synchronous pulley 603 to rotate. The first synchronous pulley 603 drives the second synchronous pulley 605 to rotate through the synchronous belt 604. The rotation of the second synchronous pulley 605 drives the connecting seat 2 to rotate, and the rotation of the connecting seat 2 drives the connecting plate 1 to rotate. When the connecting plate 1 rotates 180 degrees, the output shaft of the servo motor 602 stops rotating. At this time, the positions of the two heating tube bodies 7 are exchanged, so that the disassembly and assembly work of the heating tube body 7 can be realized while welding, and the welding time is effectively shortened, and the processing efficiency is improved.

[0026] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0027] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A positioning fixture for a water heater heating pipe, characterized in that, It includes a connecting plate (1), a connecting seat (2) is fixedly connected to the connecting plate (1), a supporting structure (8) is provided at the bottom end of the connecting seat (2), a rotating structure (6) is provided on the supporting structure (8), a fixing structure (3) is provided on the connecting plate (1), a driving structure (4) is provided on the connecting plate (1), a lifting structure (5) is provided on the connecting plate (1), and a heating tube body (7) is provided on the lifting structure (5). The fixing structure (3) includes a rotating ring (301) and a first guiding groove (302). Two rotating rings (301) are rotatably connected to the connecting plate (1). Four first guiding grooves (302) are provided on the rotating ring (301). Four sliders (304) are provided on one side of the rotating ring (301). The sliders (304) are slidably connected to the connecting plate (1). A first guiding shaft (303) is fixedly connected to the sliders (304). One end of the first guiding shaft (303) extends into the interior of the first guiding groove (302) and is slidably connected to the slider (304). One end of the slider (304) is fixedly connected to a resisting block (305). The four resisting blocks (305) are in contact with the same heating tube body (7).

2. The positioning fixture for a water heater heating pipe according to claim 1, characterized in that: The four first guiding grooves (302) are circumferentially and arrayedly distributed about the center of the rotating ring (301). The cross-section between the slider (304) and the resisting block (305) is in an L-shaped structure.

3. The positioning fixture for a water heater heating pipe according to claim 1, wherein: The connecting seat (2) is arranged in the middle of the connecting plate (1). The two rotating rings (301) are symmetrically distributed about the middle of the connecting plate (1).

4. A positioning fixture for a water heater heating pipe according to claim 1, characterized in that: The driving structure (4) includes an electric push rod (401) and a guiding column (402). The guiding column (402) is fixedly connected to the connecting plate (1). A sliding seat (403) is slidably connected to the guiding column (402). A rack (404) is fixedly connected to one side of the sliding seat (403). An incomplete gear (405) is fixedly connected to the outer side of the rotating ring (301). The rack (404) is meshed with the incomplete gear (405).

5. The positioning fixture for a water heater heating pipe according to claim 4, characterized in that: The electric push rod (401) is installed on the connecting plate (1). The extending end of the electric push rod (401) is fixedly connected to the sliding seat (403). The cross-section of the end of the sliding seat (403) is in an L-shaped structure.

6. The positioning fixture for a water heater heating pipe according to claim 1, characterized in that: The lifting structure (5) includes a rotating shaft (501) and a dragging block (502). One side of the sliding block (304) is provided with the rotating shaft (501), and the rotating shaft (501) is rotatably connected to the connecting plate (1). One end of the rotating shaft (501) is fixedly connected to the dragging block (502). Four dragging blocks (502) are in contact with the same heating tube body (7). The other end of the rotating shaft (501) is fixedly connected to a connecting piece (503). A second guiding shaft (504) is fixedly connected to the connecting piece (503). A second guiding groove (505) is provided on the sliding block (304). One end of the second guiding shaft (504) extends into the interior of the second guiding groove (505) and is slidably connected to the sliding block (304). Two receiving grooves (506) are provided on the connecting plate (1).

7. The positioning fixture for a water heater heating pipe according to claim 6, characterized in that: The directions of both ends of the second guiding groove (505) are the same as the sliding direction of the sliding block (304), and there is a certain included angle between the direction of the middle part of the second guiding groove (505) and the sliding direction of the sliding block (304). The cross-section between the rotating shaft (501) and the dragging block (502) is in an L-shaped structure.

8. A positioning fixture for a water heater heating pipe according to claim 1, characterized in that: The supporting structure (8) includes a supporting frame (801) and a rotating rod (802). The supporting frame (801) is provided at the bottom end of the connecting plate (1). A lead screw (803) is rotatably connected to the supporting frame (801). A connecting sleeve (804) is threadedly connected to the lead screw (803). The connecting sleeve (804) is slidably connected to the supporting frame (801). Two guiding strips (805) are fixedly connected to the connecting sleeve (804). The guiding strips (805) are slidably connected to the supporting frame (801). The top end of the connecting sleeve (804) is rotatably connected to a connecting seat (2). The bottom end of the supporting frame (801) is fixedly connected to a bottom plate (806). A plurality of mounting holes (807) are provided on the bottom plate (806).

9. The positioning fixture for a water heater heating pipe according to claim 8, characterized in that: The bottom end of the lead screw (803) is fixedly connected to the rotating rod (802), and the rotating rod (802) penetrates through the lead screw (803) and is perpendicular to the lead screw (803).

10. A positioning fixture for a water heater heating pipe according to claim 8, characterized in that: The rotating structure (6) includes a mounting plate (601) and a servo motor (602). The mounting plate (601) is fixedly connected to the connecting sleeve (804). The servo motor (602) is mounted on the mounting plate (601). A first synchronous pulley (603) is fixedly connected to the output shaft of the servo motor (602). A second synchronous pulley (605) is fixedly connected to the connecting seat (2). A synchronous belt (604) is wound between the first synchronous pulley (603) and the second synchronous pulley (605).

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