A multi-angle auxiliary butt joint support for heating and ventilation pipeline welding

Abstract

A kind of be applicable to warm and hot pipeline welding pipeline multi-angle auxiliary butt joint support, it is related to building construction technical field, including fixed base, first clamping assembly is arranged on fixed base, guiding seat is arranged at one side of fixed base, mobile angle seat is arranged at the top of fixed base;Two ends of fixed base are provided with telescopic moving arm, movable base is arranged between the two telescopic moving arms, and alignment support is arranged on movable base;Two ends of mobile angle seat are provided with suspension support arm, second clamping assembly is arranged between the two suspension support arms, and butt joint support that cooperates with alignment support is arranged on second clamping assembly.The unique structure design of the present application is not only limited to pipeline vertical connection, but also can effectively improve the butt joint effect of inclined pipeline, and can realize pipeline butt joint in midair, in turn can effectively reduce the labor amount of operating personnel, while the risk degree of operating personnel can be effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a multi-angle auxiliary pipe connection support suitable for welding HVAC pipes. Background Technology

[0002] Currently, after the main construction of a building is completed, especially for residential buildings, particularly in northern cities, HVAC ducts are often installed within the building structure. During the installation of these ducts, on-site welding is often required. Traditionally, vertical connection of metal pipes in buildings requires manual labor using climbing tools to reach high places to connect the pipes. Manually controlling the connection of metal pipes at high altitudes poses safety hazards. As the height of the connection point increases during continuous vertical connection operations, workers must change positions accordingly, making the work highly dangerous.

[0003] In addition, during the installation of the entire HVAC system in the main building, the connection of the HVAC system is not limited to vertical connections. There are also some oblique pipe connections. If the installation is on the ground, it is fine, but HVAC systems are generally welded in mid-air. To reduce the difficulty of welding in mid-air, the oblique pipe is usually welded to the main pipe on the ground, and then the main pipe is placed. Although the welding effect of this method is better, the weight of the pipe makes it difficult to move it back to its original position, and it requires a lot of space to maneuver. However, the space in the main building is limited.

[0004] In addition, building metal pipes are relatively heavy. Although HVAC pipes are connected manually, it takes a lot of physical strength to control the position of the metal pipes. Manual operation cannot guarantee the accuracy of the connection position of the metal pipes, and it is impossible to control the metal pipes to make precise adjustments during the connection operation, which affects the quality of the metal pipe connection.

[0005] How to solve the above-mentioned technical problems is the challenge facing this invention. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a reasonably designed, safe, and reliable multi-angle auxiliary pipe welding support suitable for HVAC pipe welding. This support enables multi-angle welding of the entire pipe while ensuring that the pipe is welded in mid-air, effectively improving the pipe welding effect. It can ensure both vertical pipe connection and multi-angle pipe connection.

[0007] The technical solution adopted by the present invention to solve its technical problem is: a multi-angle auxiliary docking support for welding HVAC pipes, including a fixed base set on the main pipe, a first clamping component that cooperates with the main pipe on the fixed base, a guide seat set on one side of the fixed base, and a guide rail that cooperates with the guide seat on the fixed base, and a movable angle seat connected to the guide seat set on the top of the fixed base.

[0008] Telescopic movable arms are provided at both ends of the fixed base, and angle components that cooperate with the telescopic movable arms are provided on the fixed base. A movable base is provided between the two telescopic movable arms. An angle limiting component that cooperates with the movable base is provided on the telescopic movable arm, and an alignment bracket is provided on the movable base.

[0009] Both ends of the movable angle seat are equipped with suspension bracket arms. A second clamping assembly that cooperates with the pipeline is provided between the two suspension bracket arms. The second clamping assembly is equipped with a docking bracket that cooperates with the alignment bracket. The second clamping assembly is also equipped with a moving unit that cooperates with the pipeline. A hanger assembly for hoisting the pipeline is provided on the ground. The hanger assembly cooperates with the moving unit.

[0010] Furthermore, a guide rod is provided at the bottom of the movable angle seat, and a guide groove that cooperates with the guide rod is provided on the top surface of the fixed base. One side of the movable angle seat is fixedly connected to the guide seat, and a guide block that cooperates with the guide rail is provided on the guide seat. The guide rail is provided on one side of the fixed base, and the first clamping assembly is provided on the other side of the fixed base. The guide seat and the first clamping assembly are located on both sides of the fixed base.

[0011] Furthermore, the angle component includes an angle bracket disposed at one end of the fixed base, a drive unit disposed on the angle bracket, a rotating base disposed on the angle bracket, a rotating shaft disposed in the rotating base that cooperates with the drive unit, a rotating gear disposed on the rotating shaft that cooperates with the drive unit, a rotating bearing disposed on the rotating shaft that rotatably cooperates with the rotating base, a connecting plate disposed on the rotating shaft that rotatably cooperates with the rotating base, and a connecting groove provided at the center of the connecting plate, and a connecting member disposed in the connecting groove for connecting the telescopic movable arm;

[0012] The telescopic mobile arm includes a fixed arm, one end of which is provided with a connecting cylinder that rotates with the rotating base. The connecting cylinder has a through groove that mates with the connecting component. The fixed arm has a control groove, and a movable arm is provided in the control groove. An angle limiting component is provided at the end of the movable arm away from the fixed arm.

[0013] Furthermore, the angle limiting component includes an angle frustum disposed on the telescopic moving arm, a rotating groove is provided in the angle frustum, a through groove is provided on the angle frustum, a rotating shaft is provided in the rotating groove, a rotating disk is provided on the rotating shaft and located in the rotating groove, a fixed block is provided on the rotating disk, a fixed gear is provided on the rotating shaft and cooperates with the fixed block, and a limiting ratchet is provided on the angle frustum and cooperates with the fixed gear.

[0014] One end of the rotating shaft is provided with a fixed disk that rotates and engages with the rotating groove. The other end of the rotating shaft passes through the through groove and is provided with a connecting base that connects to the movable base. The connecting base has a connecting groove and a connecting screw that connects to the movable base.

[0015] Furthermore, the movable base includes a base body, a connecting rod at the top of the base body, and connecting discs at both ends of the connecting rod. The connecting discs are provided with connecting holes that cooperate with the telescopic moving arm. The bottom of the base body is provided with a stabilizing component that cooperates with the fixed base. The alignment bracket is provided on the base body, and a spirit level is provided on the base body.

[0016] The stabilizing component includes a hinged column mounted on the base body, with a hinged groove in the middle section of the hinged column and a pin hole on one end face of the hinged column that matches the hinged groove. A pin is installed in the pin hole, and a telescopic fixing rod is installed in the hinged groove. One end of the telescopic fixing rod is rotatably engaged with the pin, and the other end of the telescopic fixing rod is hinged to the fixed base. A fastening screw that matches the fixed base is installed on the telescopic fixing rod.

[0017] Furthermore, the suspension support arm includes a first angle determining component disposed at the top of the movable angle seat, and the first angle determining component is fixedly connected to one end of the main boom. A support boom is disposed at the other end of the main boom, and a second angle determining component that cooperates with the support boom is disposed on the main boom. A telescopic limiting rod is disposed between the main boom and the support boom.

[0018] Furthermore, the first angle determining component has the same structure as the angle component, and the second angle determining component has the same structure as the angle limiting component.

[0019] Furthermore, the first clamping assembly includes two sets of opposing semi-circular skeleton members, one set of which is fixedly connected to the fixed base, and the main pipe is located in the clamping space enclosed by the two semi-circular skeleton members.

[0020] The semi-circular skeleton component includes several semi-circular arc plates evenly arranged along the axial direction of the main pipeline. Both ends of the opening of the semi-circular arc plates are provided with connecting plates for connecting all the semi-circular arc plates. The connecting plates are provided with connecting holes that cooperate with connecting screws. Several connecting rods are evenly arranged along the circumferential direction of the semi-circular arc plates, and fastening rods are provided on the connecting rods.

[0021] Furthermore, the second clamping assembly includes two clamping semi-cylinders arranged opposite each other, and the pipe is located in the clamping space enclosed by the two clamping semi-cylinders. The clamping semi-cylinders are provided with connecting components that cooperate with the suspension bracket arm, and the docking bracket is provided on the clamping semi-cylinders.

[0022] The moving unit includes several sets of movable clamping rods evenly arranged on the clamping half cylinder in the circumferential direction, and each set of movable clamping rods includes several movable clamping rods evenly arranged on the clamping half cylinder in the axial direction, and the movable clamping rods are provided with balls near the cross-section from one end of the pipe.

[0023] Furthermore, the connecting assembly includes a first connecting post disposed on the clamping half-cylinder, and a connecting hole groove is provided on the end face of the first connecting post, and a rotary bearing is disposed in the connecting hole groove, and the inner ring of the rotary bearing is connected to a fixed shaft, and a connecting seat is provided on one end face of the fixed shaft for connection with the suspension bracket arm.

[0024] The docking bracket includes docking ring plates respectively disposed at the top and bottom ends of the clamping half-cylinder. The docking ring plates are provided with docking grooves, and docking movable brackets that cooperate with the alignment brackets are disposed in the docking grooves.

[0025] This application preferably provides a multi-angle auxiliary pipe connection system suitable for HVAC pipe welding. Through its unique structural design, it is not limited to vertical pipe connection, but can also effectively improve the connection effect of inclined pipes and realize pipe connection in mid-air. This can effectively reduce the workload of operators and reduce the danger to operators.

[0026] This application, through the use of a movable base and a fixed base set on the main and slave pipes, and a first clamping component and a second clamping component set on the movable base and the fixed base, in conjunction with the use of a hanger component set on the other side, can effectively realize the free placement of the slave pipe, and thus is effectively applicable to the welding of slave pipes at different angles.

[0027] This application uses a first clamping assembly in conjunction with a guide seat and a fixing plate to fix the fixed base to the main pipe and prevent the fixed base from deviating on the main pipe. The movable angle seat, in conjunction with the guide rail of the guide seat and the movable base, can clamp the secondary pipe and is applicable to welding secondary pipes at different angles.

[0028] This application utilizes the docking bracket of the movable base in conjunction with the alignment bracket of the fixed base to further determine the angle between the main pipe and the slave pipe. Simultaneously, in conjunction with the use of the hanger assembly, it can further clamp the slave pipe and enable welding of the main and slave pipes, thereby improving the welding effect of the main and slave pipes. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the isometric three-dimensional structure of the present invention;

[0030] Figure 2 This is a three-dimensional schematic diagram from a first perspective of the present invention;

[0031] Figure 3 This is a front view of the present invention;

[0032] Figure 4 This is a three-dimensional schematic diagram from a second perspective of the present invention;

[0033] Figure 5 This is a schematic diagram of the enlarged structure at point A of the present invention;

[0034] Figure 6 This is a third-view exploded structure diagram of the present invention;

[0035] Figure 7 This is a schematic diagram of the enlarged structure at point B of the present invention;

[0036] Figure 8 This is an exploded view of the angle component of the present invention;

[0037] Figure 9 This is an exploded view of the angle limiting component of the present invention;

[0038] The attached diagram is labeled as follows: 11. Main pipe; 12. Sub-pipe; 2. Fixed base; 21. Guide rail; 22. Angle assembly; 221. Rotating base; 222. Rotating shaft; 223. Rotating gear; 224. Rotating bearing; 225. Connecting plate; 226. Connector; 3. First clamping assembly; 4. Suspension support arm; 41. First angle determining assembly; 42. Main boom; 43. Support boom; 44. Second angle determining assembly; 45. Telescopic limiting rod; 5. Moving angle seat; 51. Guide seat; 52. Guide rod; 6. Telescopic moving arm; 61. Angle limiting assembly. Components; 611, angular frustum; 612, rotating shaft; 613, rotating disk; 614, fixed block; 615, fixed gear; 616, limiting ratchet; 617, fixed disk; 618, connecting base; 619, connecting screw; 62, fixed arm; 63, connecting cylinder; 64, movable arm; 75, movable base; 71, base body; 72, connecting rod; 73, connecting disk; 74, stabilizing component; 741, hinge column; 742, pin; 743, telescopic fixing rod; 81, alignment bracket; 82, docking bracket; 9, second clamping component; 91, moving unit. Detailed Implementation

[0039] See Figures 1 to 9 As shown, a multi-angle auxiliary docking support for welding HVAC pipes includes a fixed base 2 set on a main pipe 11, a first clamping assembly 3 that cooperates with the main pipe 11 on the fixed base 2, a guide seat 51 set on one side of the fixed base 2, and a guide rail 21 that cooperates with the guide seat 51 on the fixed base 2. A movable angle seat 5 connected to the guide seat 51 is set directly above the fixed base 2.

[0040] Telescopic movable arms 6 are provided at both ends of the fixed base 2, and angle components 22 that cooperate with the telescopic movable arms 6 are provided on the fixed base 2. A movable base 7 is provided between the two telescopic movable arms 6. An angle limiting component 61 that cooperates with the movable base 7 is provided on the telescopic movable arms 6, and an alignment bracket 81 is provided on the movable base 7.

[0041] Both ends of the movable angle seat 5 are provided with suspension bracket arms 4. A second clamping assembly 9 that cooperates with the pipe 12 is provided between the two suspension bracket arms 4. The second clamping assembly 9 is provided with a docking bracket 82 that cooperates with the alignment bracket 81. The second clamping assembly 9 is provided with a moving unit 91 that cooperates with the pipe 12. A hanger assembly for hoisting the pipe 12 is provided on the ground. The hanger assembly cooperates with the moving unit 91.

[0042] Furthermore, a guide rod 52 is provided at the bottom end of the movable angle seat 5, and a guide groove that cooperates with the guide rod 52 is provided on the top surface of the fixed base 2. One side of the movable angle seat 5 is fixedly connected to the guide seat 51. A guide block that cooperates with the guide rail 21 is provided on the guide seat 51. The guide rail 21 is provided on one side of the fixed base 2. The first clamping assembly 3 is provided on the other side of the fixed base 2. The guide seat 51 and the first clamping assembly 3 are respectively located on both sides of the fixed base 2.

[0043] Furthermore, the angle component 22 includes an angle bracket disposed at one end of the fixed base 2, a drive unit disposed on the angle bracket, a rotating base 221 disposed on the angle bracket, a rotating shaft 222 disposed in the rotating base 221 that cooperates with the drive unit, a rotating gear 223 disposed on the rotating shaft 222 that cooperates with the drive unit, a rotating bearing 224 disposed on the rotating shaft 222 that rotatably cooperates with the rotating base 221, a connecting disk 225 disposed on the rotating shaft 222 that rotatably cooperates with the rotating base 221, a connecting groove opened at the center of the connecting disk 225, and a connecting member 226 for connecting the telescopic moving arm 6 disposed in the connecting groove;

[0044] The telescopic movable arm 6 includes a fixed arm 62. One end of the fixed arm 62 is provided with a connecting cylinder 63 that rotatably engages with the rotating base 221. The connecting cylinder 63 has a through groove that engages with the connecting member 226. The fixed arm 62 has a control groove, and a movable arm 64 is provided in the control groove. An angle limiting component 61 is provided at the end of the movable arm 64 away from the fixed arm 62.

[0045] Furthermore, the connecting cylinder 63 is provided with a plurality of connecting rods 72, and the connecting rods 72 are fixedly connected to the connecting disc 225.

[0046] Furthermore, the drive unit includes a drive motor mounted on the angle bracket, and the output end of the drive motor is provided with a drive gear that meshes with the rotating gear 223.

[0047] Furthermore, the angle limiting component 61 includes an angle frustum 611 disposed on the telescopic moving arm 6. The angle frustum 611 has a rotating groove and a through groove that passes through the angle frustum 611. A rotating shaft 612 is disposed in the rotating groove. A rotating disk 613 is disposed on the rotating shaft 612 and located in the rotating groove. A fixing block 614 is disposed on the rotating disk 613. A fixing gear 615 that cooperates with the fixing block 614 is disposed on the rotating shaft 612. A limiting ratchet 616 that cooperates with the fixing gear 615 is disposed on the angle frustum 611.

[0048] One end of the rotating shaft 612 is provided with a fixed disk 617 that rotatably engages with the rotating groove. The other end of the rotating shaft 612 passes through the through groove and is provided with a connecting base 618 that is connected to the movable base 7. The connecting base 618 is provided with a connecting groove and a connecting screw 619 that is connected to the movable base 7.

[0049] Furthermore, the limiting ratchet member 616 includes a ratchet that cooperates with the fixed gear 615, and a pressing member is hinged to the ratchet. A pressing cylinder that cooperates with the pressing member is provided on the angular frustum 611.

[0050] Furthermore, the movable base 7 includes a base body 71, a connecting rod 72 is provided at the top of the base body 71, and a connecting disc 73 is provided at both ends of the connecting rod 72. The connecting disc 73 is provided with a connecting hole that cooperates with the telescopic moving arm 6. The bottom end of the base body 71 is provided with a stabilizing component 74 that cooperates with the fixed base 2. The alignment bracket 81 is provided on the base body 71, and a spirit level is provided on the base body 71.

[0051] The stabilizing component 74 includes a hinge post 741 disposed on the base body 71, and a hinge groove is provided in the middle section of the hinge post 741. A pin hole that mates with the hinge groove is provided on one end face of the hinge post 741. A pin 742 is disposed in the pin hole. A telescopic fixing rod 743 is disposed in the hinge groove. One end of the telescopic fixing rod 743 is rotatably engaged with the pin 742. The other end of the telescopic fixing rod 743 is hingedly connected to the fixed base 2. A fastening screw that mates with the fixed base 2 is provided on the telescopic fixing rod 743.

[0052] Preferably, the stabilizing components 74 are provided in two sets, and the two sets of stabilizing components 74 are respectively located at both ends of the base body 71.

[0053] Preferably, a stabilizing column that cooperates with the telescopic fixing rod 743 is provided at the top of the base body 71.

[0054] Furthermore, the telescopic fixing rod 743 includes a stabilizing ring that rotates with the stabilizing column. The stabilizing ring has a telescopic rib, and the telescopic rib has a telescopic groove. The telescopic groove has a movable rib, and the telescopic rib has a limiting screw that cooperates with the movable rib. One end of the movable rib has a movable ring that cooperates with the hinge column 741.

[0055] Furthermore, the suspension support arm 4 includes a first angle determining component 41 disposed at the top of the movable angle seat 5, and the first angle determining component 41 is fixedly connected to one end of the main boom. A support boom 43 is disposed at the other end of the main boom, and a second angle determining component 44 that cooperates with the support boom 43 is disposed on the main boom. A telescopic limiting rod 45 is disposed between the main boom and the support boom 43.

[0056] Furthermore, the first angle determining component 41 has the same structure as the angle component 22, and the second angle determining component 44 has the same structure as the angle limiting component 61.

[0057] Furthermore, the first angle determining component 41 includes a determining column disposed on the movable angle seat 5, and a motor is disposed in the determining column. An output gear is disposed at the output end of the motor, and a rotating cylinder is disposed at one end of the main boom that rotates in cooperation with the determining column. A circular gear that meshes with the output gear is disposed at one end of the rotating cylinder.

[0058] Furthermore, the first clamping assembly 3 includes two sets of opposing semi-circular skeleton members, one set of which is fixedly connected to the fixed base 2, and the main pipe 11 is located in the clamping space enclosed by the two semi-circular skeleton members.

[0059] The semi-circular skeleton component includes a plurality of semi-circular arc plates evenly arranged along the axial direction of the main pipe 11. Both ends of the opening of the semi-circular arc plates are provided with connecting plates for connecting all the semi-circular arc plates. The connecting plates are provided with connecting holes that cooperate with the connecting screws 619. A plurality of connecting rods 72 are evenly arranged along the circumferential direction of the semi-circular arc plates, and fastening rods are provided on the connecting rods 72.

[0060] Furthermore, the second clamping assembly 9 includes two clamping semi-cylinders arranged opposite to each other, and the conduit 12 is located in the clamping space enclosed by the two clamping semi-cylinders. The clamping semi-cylinders are provided with connecting components that cooperate with the suspension bracket arm 4, and the docking bracket 82 is provided on the clamping semi-cylinders.

[0061] The moving unit 91 includes several sets of movable clamping rods evenly arranged on the clamping half cylinder along the circumferential direction of the clamping half cylinder, and each set of movable clamping rods includes several movable clamping rods evenly arranged on the clamping half cylinder along the axial direction of the clamping half cylinder, and the movable clamping rods are provided with ball bearings near the cross section of the end of the pipe 12.

[0062] Furthermore, the connecting assembly includes a first connecting post disposed on the clamping half-cylinder, and a connecting hole groove is provided on the end face of the first connecting post, and a rotating shaft 222 bearing is disposed in the connecting hole groove, and the inner ring of the rotating shaft 222 bearing is connected to a fixed shaft, and a connecting seat is provided on one end face of the fixed shaft for connecting with the suspension bracket arm 4.

[0063] The docking bracket 82 includes docking ring plates respectively disposed at the top and bottom ends of the clamping half-cylinder. The docking ring plates are provided with docking grooves, and docking movable brackets that cooperate with the alignment bracket 81 are disposed in the docking grooves.

[0064] In use, according to the angle of the pipe to be connected, the first clamping unit is used to fix the entire fixed base 2 on the main pipe 11. Then, the guide cabinet is used to move the angle seat 5 to one end of the distance, providing a certain installation space for the suspension support arm 43.

[0065] Subsequently, the angle and position of the installation from pipe 12 are determined. Using the telescopic moving arm 6, the movable base 7 is positioned at one end of pipe 12, laying the foundation for the horizontal movement of pipe 12. Then, one end of pipe 12 is lifted using the hanger assembly, and the other end of pipe 12 is clamped using the second clamping assembly 9 and the moving part is used to clamp it. Then, the suspension bracket arm 4 is adjusted until the alignment bracket 81 is aligned with the docking bracket 82, and the angle of the suspension bracket arm 4 is further limited using the telescopic limiting rod 45. Then, the docking moving bracket is docked with the alignment bracket 81. Then, the moving unit 91 is adjusted. At this time, the construction personnel slowly move pipe 12 by manually pushing it to achieve docking. Then, welding work is carried out.

[0066] The technical features of this invention not described can be implemented by or using existing technology, and will not be repeated here. Of course, the above description is not a limitation of this invention, and this invention is not limited to the examples above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this invention should also be within the protection scope of this invention.

Claims

1. A multi-angle auxiliary butt support for welding HVAC pipes, comprising a fixed base (2) disposed on a main pipe (11), wherein the fixed base (2) is provided with a first clamping assembly (3) that cooperates with the main pipe (11), characterized in that: The fixed base (2) is provided with a guide seat (51) on one side, and a guide rail (21) is formed on the fixed base (2) and matched with the guide seat (51); a moving angle seat (5) is arranged above the fixed base (2) and connected with the guide seat (51). Two telescopic moving arms (6) are arranged at the two ends of the fixed base (2) and matched with an angle assembly (22) arranged on the fixed base (2); an activity base (7) is arranged between the two telescopic moving arms (6) and matched with an angle limiting assembly (61) arranged on the telescopic moving arm (6); and an alignment support (81) is arranged on the activity base (7). The moving angle seat (5) is provided with a hanging support arm (4) at the two ends, and a second clamping assembly (9) is arranged between the two hanging support arms (4) and matched with a slave pipeline (12); the second clamping assembly (9) is provided with a butt support (82) matched with the alignment support (81), and a moving unit (91) matched with the slave pipeline (12) is arranged in the second clamping assembly (9); a lifting assembly is arranged on the ground to lift the slave pipeline (12), and the lifting assembly is matched with the moving unit (91).

2. A multi-angle auxiliary butt joint support for HVAC pipe welding according to claim 1, characterized in that: The moving angle seat (5) is provided with a guide rod (52) at the bottom end, and a guide groove matched with the guide rod (52) is formed on the top surface of the fixed base (2); one side of the moving angle seat (5) is fixedly connected with the guide seat (51); a guide block matched with the guide rail (21) is arranged on the guide seat (51); the guide rail (21) is formed on one side surface of the fixed base (2); the first clamping assembly (3) is arranged on the other side surface of the fixed base (2); and the guide seat (51) and the first clamping assembly (3) are respectively arranged at the two sides of the fixed base (2).

3. A multi-angle auxiliary butt joint support for HVAC pipe welding according to claim 1, characterized in that: The angle assembly (22) comprises an angle support arranged at one end of the fixed base (2); a driving unit is arranged on the angle support; a rotating base (221) is arranged on the angle support; a rotating shaft (222) matched with the driving unit is arranged in the rotating base (221); a rotating gear (223) matched with the driving unit is arranged on the rotating shaft (222); a rotating bearing (224) rotationally matched with the rotating base (221) is arranged on the rotating shaft (222); a connecting disc (225) rotationally matched with the rotating base (221) is arranged on the rotating shaft (222); a connecting groove is formed at the center of the connecting disc (225); and a connecting piece (226) for connecting the telescopic moving arm (6) is arranged in the connecting groove. The telescopic moving arm (6) comprises a fixed arm (62), one end of the fixed arm (62) is provided with a connecting barrel (63) which is rotationally matched with the rotating base (221), the connecting barrel (63) is provided with a through groove matched with the connecting piece (226), the fixed arm (62) is provided with a control groove, the control groove is provided with a movable arm (64), and one end of the movable arm (64) away from the fixed arm (62) is provided with an angle limiting assembly (61).

4. A multi-angle auxiliary butt joint support for HVAC pipe welding according to claim 1, characterized in that: The angle limiting assembly (61) comprises an angle circular table (611) provided on the telescopic moving arm (6), the angle circular table (611) is provided with a rotating circular groove, the angle circular table (611) is provided with a through groove penetrating the angle circular table (611), the rotating circular groove is provided with a rotating shaft (612), the rotating shaft (612) is provided with a rotating disc (613) located in the rotating circular groove, the rotating disc (613) is provided with a fixed block (614), the rotating shaft (612) is provided with a fixed gear (615) matched with the fixed block (614), and the angle circular table (611) is provided with a limiting ratchet piece (616) matched with the fixed gear (615). One end of the rotating shaft (612) is provided with a fixed disc (617) rotationally matched with the rotating circular groove, the other end of the rotating shaft (612) penetrates the through groove and is provided with a connecting base (618) connected with the movable base (7), the connecting base (618) is provided with a connecting circular groove, and the connecting base (618) is provided with a connecting screw rod (619) connected with the movable base (7).

5. A multi-angle auxiliary butt joint support for HVAC pipe welding according to claim 1, characterized in that: The movable base (7) comprises a base body (71), the top end of the base body (71) is provided with a connecting rod (72), both ends of the connecting rod (72) are respectively provided with a connecting disc (73), the connecting disc (73) is provided with a connecting hole matched with the telescopic moving arm (6), the bottom end of the base body (71) is provided with a stabilizing assembly (74) matched with the fixed base (2), the alignment support (81) is arranged on the base body (71), and the base body (71) is provided with a bubble level. The stabilizing assembly (74) comprises a hinged column (741) arranged on the base body (71), a hinge groove is arranged in the middle of the hinged column (741), one end surface of the hinged column (741) is provided with a pin hole matched with the hinge groove, the pin hole is provided with a latch (742), the hinge groove is provided with a telescopic fixing rod (743), one end of the telescopic fixing rod (743) is rotationally matched with the latch (742), the other end of the telescopic fixing rod (743) is hingedly connected with the fixed base (2), and the telescopic fixing rod (743) is provided with a fastening screw matched with the fixed base (2).

6. A multi-angle auxiliary butt joint support for HVAC pipe welding according to claim 1, characterized in that: The hanging support arm (4) comprises a first angle determining assembly (41) arranged at the top end of the moving angle base (5), and the first angle determining assembly (41) is fixedly connected with one end of a main hanging arm, the other end of the main hanging arm is provided with a branch hanging arm (43), and the main hanging arm is provided with a second angle determining assembly (44) matched with the branch hanging arm (43), and a telescopic limiting rod (45) is arranged between the main hanging arm and the branch hanging arm (43).

7. A multi-angle auxiliary butt joint support for HVAC pipe welding according to claim 6, characterized in that: The first angle determining assembly (41) is consistent with the structure of the angle assembly (22), and the second angle determining assembly (44) is consistent with the structure of the angle limiting assembly (61).

8. A multi-angle auxiliary butt joint support for HVAC pipe welding according to claim 4, characterized in that: The first clamping assembly (3) comprises two groups of oppositely arranged semicircular framework pieces, one group of the semicircular framework pieces is fixedly connected with the fixed base (2), and the main pipeline (11) is located in the clamping space surrounded by the two semicircular framework pieces. The semicircular framework piece comprises a plurality of semicircular arc plates arranged uniformly along the axial direction of the main pipeline (11), and the two ends of the opening of the semicircular arc plate are provided with a connecting plate for connecting all the semicircular arc plates, and the connecting plate is provided with a connecting hole matched with the connecting screw rod (619), and the semicircular arc plate is uniformly provided with a plurality of connecting rods (72) along the circumferential direction of the semicircular arc plate, and the connecting rod (72) is provided with a fastening rod.

9. A multi-angle auxiliary butt joint support for HVAC pipe welding according to claim 1, characterized in that: The second clamping assembly (9) comprises two oppositely arranged clamping half cylinder pieces, and the branch pipeline (12) is located in the clamping space surrounded by the two clamping half cylinder pieces, the clamping half cylinder piece is provided with a connecting assembly matched with the hanging support arm (4), and the butt joint support (82) is arranged on the clamping half cylinder piece. The moving unit (91) comprises a plurality of groups of moving clamping rods arranged uniformly on the clamping half cylinder piece along the circumferential direction of the clamping half cylinder piece, and each group of moving clamping rods comprises a plurality of moving clamping rods arranged uniformly on the clamping half cylinder piece along the axial direction of the clamping half cylinder piece, and the cross section of the moving clamping rod close to one end of the branch pipeline (12) is provided with a ball.

10. A multi-angle auxiliary butt joint support for HVAC pipe welding according to claim 9, characterized in that: The connecting assembly comprises a first connecting column arranged on the clamping half cylinder piece, and the end face of the first connecting column is provided with a connecting hole slot, and the connecting hole slot is provided with a rotating shaft (222) bearing, and the inner ring of the rotating shaft (222) bearing is connected with a fixed shaft piece, and one end face of the fixed shaft piece is provided with a connecting seat piece connected with the hanging support arm (4). The butt joint support (82) comprises butt joint ring plates arranged at the top and bottom ends of the clamping half cylinder piece respectively, the butt joint ring plate is provided with a butt joint groove, and the butt joint groove is provided with a butt joint moving support matched with the alignment support (81).

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