Composite pipe drilling and welding integrated machine and hole-opening welding process using the drilling and welding integrated machine

Abstract

The present invention discloses a composite pipe drilling and welding machine and a process for drilling and welding using the drilling and welding machine, wherein the drilling and welding machine comprises a bottom pipe fixing frame and a drilling and welding integrated assembly, wherein the drilling and welding integrated assembly comprises a basic seat and a base, wherein a drilling device and a welding device are sequentially arranged on the base, wherein the welding device comprises a transverse support frame and a pipe extension clamping mobile unit and a heating mold mobile unit arranged on the transverse support frame, wherein the heating mold mobile unit comprises a heating mold. The drilling and welding machine of the present invention has an ingenious structure, can realize the integration of drilling and welding, has a high degree of automation, and has a high production speed, and can realize continuous and precise interval drilling and welding of pipe extensions on a pipe fitting; it can also meet the drilling requirements of pipes with different apertures; the welding alignment is accurate, and it is particularly suitable for drilling and welding of mesh steel belt polyethylene composite pipes.

Description

Technical Field

[0001] The invention belongs to the field of pipe processing, and particularly relates to a composite pipe drilling and welding machine and a process for drilling and welding using the drilling and welding machine, and is particularly suitable for on-site drilling and connecting of perforated steel strip polyethylene composite pipes. Background Art

[0002] At present, when opening holes in composite pipe fittings and connecting additional pipes, it is usually necessary to first use a hole drill to open a hole in the pipe, and then use a hot air welding gun and polyethylene welding wire to blow weld on the cross section. However, this process has the following technical defects: (1) The polyethylene welding wire is greatly affected by temperature and is prone to oil separation during blow welding, which affects the welding effect; (2) The blow welding method is greatly affected by manual labor, and the quality of the welded finished product is poor, and there are often cracks and falls off. In this case, it is particularly unsuitable for sealing the holes of the perforated steel belt polyethylene composite pipe that passes corrosive liquids after opening, because if the sealing quality is not good, the perforated steel belt layer in the composite pipe is easily exposed, which is easily corroded by the medium in the pipe, and the iron ions on the corroded steel belt are easy to contaminate the medium in the pipe, and the medium is also easy to penetrate along the perforated steel belt and cause pipe bursting. For this reason, people hope to find a device with better welding effect when connecting composite pipes and adding additional pipes. Summary of the invention

[0003] In order to solve the problems existing in the prior art, the purpose of the present invention is to provide a composite pipe drilling and welding machine and a process for drilling and welding using the drilling and welding machine.

[0004] The present invention is achieved through the following technical solutions:

[0005] The composite pipe drilling and welding machine comprises a bottom pipe fixing frame and a drilling and welding integrated assembly mounted above the bottom pipe fixing frame and movable left and right along the bottom pipe fixing frame, the drilling and welding integrated assembly comprises a basic seat and a base arranged above the basic seat and movable forward and backward relative to the basic seat, a drilling device and a welding device are arranged on the base in sequence, the welding device comprises a transverse support frame and a pipe adding clamping and moving unit and a heating mold moving unit arranged on the transverse support frame, the pipe adding clamping and moving unit comprises a pipe adding fixture and a first driving structure fixedly arranged on the transverse support frame and capable of controlling the pipe adding fixture to move up and down, the heating mold moving unit comprises a horizontal moving plate driven by a second driving structure arranged on the transverse support frame and a heating mold arranged below the horizontal moving plate and driven by a third driving structure arranged on the horizontal moving plate and capable of moving up and down relative to the horizontal moving plate, the heating mold comprises a support plate and an upper mold and a lower mold integrally formed on the support plate, the structure of the upper mold matches the lower end connecting end of the pipe adding fixture, and the structure of the lower mold matches the hole end surface structure of the pipe fitting.

[0006] Preferably, the bottom pipe fixing frame includes a base frame and a side frame. A plurality of arc-shaped grippers are evenly arranged on one side of the top of the base frame, and the other side is connected to the side frame. The arc-shaped grippers are connected to the base frame through a pin shaft and a first cylinder. The first cylinder drives the opening and closing of the arc-shaped grippers. Each arc-shaped gripper is provided with a push plate, which is arranged on the side frame through a screw rod. A rotating wheel for rotating the screw rod is arranged on the screw rod. A plurality of top tube plates are evenly arranged on the base frame, and the top tube plates are located in the center of the base frame. The top tube plates are connected to the base frame through a second cylinder.

[0007] Preferably, anti-skid rubber pads are attached to the surfaces of the arc-shaped gripper, the push plate and the top tube plate.

[0008] Preferably, a welding internal support device that can be placed in the pipeline opening is provided in cooperation with the lower mold, and the welding internal support device includes a base and a top plate arranged on the top of the base. The top plate and the base are connected by a third cylinder fixed on the base, and the top plate is arranged on the movable end of the third cylinder. The top plate is an arc-shaped structure adapted to the inner wall of the pipeline opening, and a cylindrical positioning column is arranged in the top center of the top plate.

[0009] More preferably, support plates are symmetrically arranged on both sides of the bottom of the base, the support plates are semicircular plates, and rollers that can cooperate with the inner wall of the pipeline are symmetrically arranged on both sides of the support plates.

[0010] More preferably, a plurality of guide rods are arranged at the bottom of the top plate, and through holes are arranged on the base, through which the guide rods pass.

[0011] Preferably, in cooperation with the positioning column, there is provided an upper cover which can be snapped onto the pipeline opening and can cover the positioning column, the upper cover is a cylindrical structure, and the top of the upper cover is a conical cavity. After covering the upper cover, the positioning column is matched with the conical inner cavity of the upper cover, so that the positioning column is kept in the center of the opening.

[0012] Preferably, a horizontally arranged parallel rack and two first linear guide rails are fixedly provided above the bottom pipe fixing frame, and a gear driven by a seventh driving structure on the fixed basic frame and meshing with the rack on the bottom pipe fixing frame is provided below the basic frame of the drilling and welding integrated assembly, and a groove cooperating with the two first linear guide rails is also fixedly provided below the basic frame of the drilling and welding integrated assembly. More preferably, the seventh driving structure is a motor driving structure.

[0013] Preferably, a sixth driving structure is fixed on the basic seat, and the bottom plate is driven by the sixth driving structure to move forward and backward relative to the basic seat to meet the needs of opening and welding of pipes with different diameters. More preferably, the sixth driving structure is a screw driving structure.

[0014] Preferably, two guide rods are provided on both sides of the first driving structure and vertically penetrate the horizontal support frame, and the upper end of the additional tube clamp is connected to the lower ends of the two guide rods. A fourth driving structure is also fixedly provided on the additional tube clamp and the opening and closing of the additional tube clamp is controlled by the fourth driving structure.

[0015] Preferably, a second linear guide rail capable of guiding the horizontally movable plate is horizontally provided on the transverse support frame between the horizontally movable plate, and a groove capable of cooperating with the second linear guide rail is fixedly provided on the horizontally movable plate.

[0016] Preferably, a third linear guide rail is vertically provided on the support plate of the heating mold, and a groove capable of cooperating with the third linear guide rail on the support plate of the heating mold is provided on the horizontal movable plate.

[0017] Preferably, the drilling device includes a connecting plate connected to the base and a back plate driven by a fifth driving structure arranged on the connecting plate and can move up and down along the connecting plate, and a punching mechanism is fixed on the back plate, and the punching mechanism includes a motor fixed on the back plate and a drill bit arranged at the lower end of the motor and driven to rotate by the motor.

[0018] More preferably, a fourth linear guide rail is vertically provided on the back of the back plate, and a groove capable of cooperating with the fourth linear guide rail on the back plate is provided on the connecting plate.

[0019] More preferably, the fourth and fifth driving structures are both cylinder driving devices or hydraulic driving devices.

[0020] The present invention also discloses a production process for hole welding using the drilling and welding integrated machine, which comprises the following steps in sequence:

[0021] 1) Fix the pipe with the bottom pipe fixing frame;

[0022] 2) Move the drilling and welding integrated assembly to the position where the pipe needs to be drilled;

[0023] 3) Drill holes in the pipeline using a drilling device;

[0024] 4) The fixture on the additional tube clamping moving unit clamps the additional tube, and the drilling and welding integrated assembly moves to keep the lower end face of the additional tube perpendicular to the opening end face of the pipeline;

[0025] 5) Adjust the position of the heating mold on the heating mold moving unit, move it to the bottom of the additional tube, and continue to move until the lower mold is attached to the end face of the pipe opening. After the heating mold has finished moving down, control the additional tube clamp to move downward so that the bottom of the additional tube is in close contact with the upper mold of the heating mold, and then heat the bottom of the additional tube and the end face of the pipe opening at the same time;

[0026] 6) After the heating time is met, lift up the additional tube, remove the heating mold, and then quickly press the additional tube down to the end face of the hole through the additional tube clamping moving unit, and maintain the pressure until cooling so that the additional tube and the end face of the hole form a smooth whole;

[0027] 7) Loosen and reset the additional pipe clamp to complete the additional pipe welding.

[0028] 8) After completing the drilling and welding at one position, the drilling and welding integrated assembly continues to move the required distance relative to the bottom pipe fixing frame, so that holes can be drilled and welded continuously on the pipe as needed.

[0029] Preferably, after the hole is opened in step 3), the welding inner support device is pushed into the hole in the pipeline from the pipeline entrance, the welding inner support device includes a base and a top plate arranged on the top of the base, the top plate and the base are connected by a third cylinder fixed on the base, the top plate is arranged on the movable end of the third cylinder, the top plate is an arc-shaped structure adapted to the inner wall of the pipeline opening, and a cylindrical positioning column is arranged at the top center of the top plate, and then the top plate with the positioning column is lifted by the cylinder so that the top plate fits the inner surface of the pipeline at the opening and the positioning column extends from the opening; then the top plate can be clamped on the pipeline opening and can The upper cover covering the positioning column is covered on the positioning column extending from the opening. The upper cover is a cylindrical structure, and the top of the upper cover is a conical cavity. After covering the upper cover, the positioning column is matched with the conical inner cavity of the upper cover, so that the positioning column is kept in the center of the opening, that is, a guide is provided for the position of the positioning column; after completing the positioning column guidance, the upper cover is removed to prepare for the heating mold to heat the opening end face. At that time, the heating mold moves down and the positioning column is inserted into the lower mold of the heating mold. Under the action of the lining of the top plate and the positioning column, the combination of the welding extension tube and the opening end face is smoother. After step 7) is completed, the welding inner support device is taken out.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The composite pipe drilling and welding integrated machine of the present invention has an ingenious structure, can realize integrated drilling and welding, and has a high degree of automation. By simultaneously heating the bottom welding surface of the additional pipe and the end face of the composite pipe opening and quickly combining them, it can ensure that the joint is welded tightly, the production speed is fast, and the sealing effect is reliable, and the problem of excessive reliance on the manual level of workers in the past is eliminated; in particular, through the use of the welding inner support device, it can ensure that the position alignment during welding is more accurate, making it particularly suitable for drilling holes in the mesh steel belt polyethylene composite pipe and welding the additional pipe, which can avoid the mesh steel belt from being exposed, protect the steel belt from being corroded by the medium in the pipe, protect the medium in the pipeline from being contaminated by iron ions, protect the pipeline, and prevent the medium from penetrating along the steel belt and causing pipe bursting; moreover, the drilling and welding integrated assembly can be moved along the bottom fixed frame, so that continuous and precise intervals of holes can be opened on a pipe fitting and the additional pipe can be welded; the base can be moved back and forth relative to the basic seat to meet the drilling requirements of pipelines with different apertures, has good flexibility, strong practicality, and is worthy of promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] For ease of explanation, the present invention is described in detail with reference to the following specific embodiments and accompanying drawings.

[0033] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0034] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0035] Figure 3 is a schematic diagram of the three-dimensional structure of the bottom pipe fixing frame;

[0036] Figure 4 for Figure 3 Side view of

[0037] Figure 5 It is a schematic diagram of the three-dimensional structure of the drilling and welding integrated component;

[0038] Figure 6 for Figure 5 Side view of

[0039] Figure 7 It is a schematic diagram of the three-dimensional structure of the welding device;

[0040] Figure 8 It is a schematic diagram of the main structure of the welding device;

[0041] Fig. 9 It is a schematic diagram of the main structure of the welding inner support device;

[0042] Fig.10 It is a side view structural schematic diagram of the welding inner support device;

[0043] Fig.11It is a schematic diagram of the main structure of a welded inner support device with an upper cover. DETAILED DESCRIPTION

[0044] like Figure 1-11 As shown, the composite pipe drilling and welding machine comprises a bottom pipe fixing frame 10 and a drilling and welding integrated assembly mounted above the bottom pipe fixing frame 10 and movable left and right along the bottom pipe fixing frame 10, the drilling and welding integrated assembly comprises a basic seat 1 and a base 2 arranged above the basic seat 1 and movable forward and backward relative to the basic seat 1, the base 2 is sequentially provided with a drilling device 20 and a welding device 30, the welding device 30 comprises a transverse support frame 31 and a pipe adding clamping moving unit 32 and a heating mold moving unit 33 arranged on the transverse support frame 31, the pipe adding clamping moving unit 32 comprises a pipe adding clamp 321 and a pipe adding clamp 321 fixedly arranged on the transverse support frame 31 and movable A first driving structure 322 controls the up and down movement of the additional tube clamp 321, and the heating mold moving unit 33 includes a horizontal moving plate 331 driven by a second driving structure 332 arranged on the transverse support frame 31, and a heating mold 333 arranged below the horizontal moving plate 331 and driven by a third driving structure 334 arranged on the horizontal moving plate 331 and can move up and down relative to the horizontal moving plate 331. The heating mold 333 includes a support plate and an upper mold 3331 and a lower mold 3332 integrally formed on the support plate, the structure of the upper mold cooperates with the lower end connecting end of the additional tube 40, and the structure of the lower mold cooperates with the open end face structure of the pipe fitting 50.

[0045] The bottom pipe fixing frame 10 includes a base frame 11 and a side frame 12. A plurality of arc-shaped grippers 13 are evenly arranged on one side of the top of the base frame 11, and the other side is connected to the side frame 12. The arc-shaped grippers 13 are connected to the base frame 11 through a pin shaft and a first cylinder 14. The first cylinder 14 drives the opening and closing of the arc-shaped grippers 13. Each arc-shaped gripper 13 is provided with a push plate 15. The push plate 15 is provided on the side frame 12 through a screw rod. A rotating wheel 16 for rotating the screw rod is provided on the screw rod. A plurality of top tube plates 17 are evenly provided on the base frame 11. The top tube plates 17 are located in the center of the base frame 11, and the top tube plates 17 are connected to the base frame 11 through a second cylinder 18.

[0046] Anti-skid rubber pads are attached to the surfaces of the arc-shaped gripper 13 , the push plate 15 and the top tube plate 17 .

[0047] In cooperation with the lower mold 3332, there is a welding internal support device 60 that can be placed in the opening of the pipe 50. The welding internal support device 60 includes a base 61 and a top plate 62 arranged on the top of the base 61. The top plate 62 is connected to the base 61 through a third cylinder 64 fixed on the base 61. The top plate 62 is arranged on the movable end of the third cylinder 64. The top plate 62 is an arc-shaped structure adapted to the inner wall of the opening of the pipe 50, and a cylindrical positioning column 65 is arranged at the top center of the top plate 62.

[0048] Support plates 66 are symmetrically arranged on both sides of the bottom of the base 61 . The support plates 66 are semicircular plates. Rollers 63 that can cooperate with the inner wall of the pipe 50 are symmetrically arranged on both sides of the support plates 66 .

[0049] A plurality of guide rods 68 are disposed at the bottom of the top plate 62 , and through holes are disposed on the base 61 , through which the guide rods 68 pass.

[0050] In cooperation with the positioning column 65, there is provided an upper cover 70 which can be clamped on the opening of the pipe 50 and can cover the positioning column 65. The upper cover 70 is a cylindrical structure, and the end face at the bottom thereof can be matched with the end face of the opening. The top of the upper cover is a conical cavity. After covering the upper cover, the positioning column is matched with the conical inner cavity of the upper cover, so that the positioning column is kept in the center of the opening, that is, a guide is provided for the position of the positioning column.

[0051] A horizontally arranged parallel rack 3 and two first linear guide rails 4 are fixedly arranged above the bottom pipe fixture frame 10, and a gear 5 driven by a seventh driving structure 8 on the fixed basic seat 1 and meshing with the rack 3 on the bottom pipe fixture frame 10 is arranged below the basic seat 1 of the drilling and welding integrated assembly, and a groove 6 matching with the two first linear guide rails 4 is also fixedly arranged below the basic seat 1 of the drilling and welding integrated assembly. The seventh driving structure 8 is a motor driving structure.

[0052] A sixth driving structure 7 is fixed on the basic base 1 , and the bottom plate 2 is driven by the sixth driving structure 7 to move forward and backward relative to the basic base 1 to meet the needs of opening and welding of pipes 50 with different diameters.

[0053] The sixth driving structure 7 is a screw driving structure.

[0054] Two guide rods 323 are provided on both sides of the first driving structure 322 and vertically penetrate the horizontal support frame 31. The upper end of the additional tube clamp 321 is connected to the lower ends of the two guide rods 323. A fourth driving structure 324 is also fixedly provided on the additional tube clamp 321 and the opening and closing of the additional tube clamp 321 is controlled by the fourth driving structure 324.

[0055] A second linear guide rail 335 capable of guiding the horizontal moving plate 331 is horizontally disposed on the transverse support frame 31 and between the horizontal moving plate 331 . A groove capable of cooperating with the second linear guide rail 335 is fixedly disposed on the horizontal moving plate 331 .

[0056] A third linear guide rail 336 is vertically disposed on the support plate of the heating mold 333 , and a groove that can cooperate with the third linear guide rail 336 on the support plate of the heating mold 333 is disposed on the horizontal moving plate 331 .

[0057] The drilling device 20 includes a connecting plate 21 connected to the base 2 and a back plate 22 driven by a fifth driving structure arranged on the connecting plate 21 and movable up and down along the connecting plate 21. A punching mechanism 24 is fixedly provided on the back plate 22. The punching mechanism 24 includes a motor fixedly provided on the back plate 22 and a drill bit 241 arranged at the lower end of the motor and driven to rotate by the motor.

[0058] The back of the back plate 22 is vertically provided with a fourth linear guide rail 25 , and the connecting plate 21 is provided with a groove that can cooperate with the fourth linear guide rail 25 on the back plate 22 .

[0059] The first, second, third, fourth and fifth driving structures are all cylinder driving devices or hydraulic driving devices.

[0060] The process of hole welding using the drilling and welding machine includes the following steps in sequence:

[0061] 1) Fix the pipes with the bottom pipe fixing frame.

[0062] 2) Move the drilling and welding integrated assembly to the position where the pipe needs to be drilled.

[0063] 3) Drill holes in the pipe using a drilling device.

[0064] 4) Push the welding inner support device from the pipeline entrance into the opening in the pipeline, and lift the top plate with the positioning column through the cylinder so that the top plate fits the inner surface of the pipeline at the opening and the positioning column extends from the opening;

[0065] 5) Then, an upper cover that can be snapped onto the opening of the pipe and can cover the positioning column is placed on the positioning column extending from the opening. The upper cover is a cylindrical structure, and the top of the upper cover is a conical cavity. After covering the upper cover, the positioning column is matched with the conical inner cavity of the upper cover, so that the positioning column is kept in the center of the opening, that is, a guide is provided for the position of the positioning column; after the positioning column is guided, the upper cover is removed to prepare for the subsequent heating of the lower mold of the mold to accurately heat the hole surface;

[0066] 6) After completing the positioning column guidance, remove the upper cover;

[0067] 7) The fixture on the additional tube clamping moving unit clamps the additional tube, and the drilling and welding integrated assembly moves to keep the lower end face of the additional tube perpendicular to the opening end face of the pipeline;

[0068] 8) Adjust the position of the heating mold on the heating mold moving unit, move it to the bottom of the additional pipe and continue to move until the lower mold is attached to the end face of the pipe opening. At this time, the lower mold is just sleeved on the positioning column. After the heating mold is moved down, adjust the fixture to move downward so that the bottom of the additional pipe is in close contact with the upper mold of the heating mold, and then heat the connection of the additional pipe and the end face of the pipe opening at the same time;

[0069] 9) After the heating time is met, lift the additional tube, remove the heating mold, and then quickly press the additional tube down to the end face of the opening through the additional tube clamping moving unit, and maintain the pressure until cooling. Under the action of the welding inner support device, the additional tube and the end face of the opening form a smooth whole;

[0070] 10) Loosen and reset the additional tube clamp, remove the welding inner support device, and complete the additional tube welding.

[0071] 11) After completing the drilling and welding at one position, the integrated drilling and welding assembly continues to move the required distance relative to the fixing frame at the bottom of the pipeline, so that holes can be drilled and welded continuously on the pipeline as needed.

[0072] The composite pipe drilling and welding integrated machine of the present invention has an ingenious structure, can realize integrated drilling and welding, and has a high degree of automation. By simultaneously heating the bottom welding surface of the additional pipe and the end face of the composite pipe opening and quickly combining them, it can ensure that the joint is welded tightly, the production speed is fast, and the sealing effect is reliable, and the problem of excessive reliance on the manual level of workers in the past is eliminated; in particular, through the use of the welding inner support device, it can ensure that the position alignment during welding is more accurate, making it particularly suitable for drilling holes in the mesh steel belt polyethylene composite pipe and welding the additional pipe, which can avoid the mesh steel belt from being exposed, protect the steel belt from being corroded by the medium in the pipe, protect the medium in the pipeline from being contaminated by iron ions, protect the pipeline, and prevent the medium from penetrating along the steel belt and causing pipe bursting; moreover, the drilling and welding integrated assembly can be moved along the bottom fixed frame, so that continuous and precise intervals of holes can be opened on a pipe fitting and the additional pipe can be welded; the base can be moved back and forth relative to the basic seat to meet the drilling requirements of pipelines with different apertures, has good flexibility, strong practicality, and is worthy of promotion.

[0073] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope defined in the claims.

Claims

1. Composite pipe drilling and welding machine, characterized in that: The invention comprises a bottom pipe fixing frame and a drilling and welding integrated assembly mounted above the bottom pipe fixing frame and movable left and right along the bottom pipe fixing frame, the drilling and welding integrated assembly comprises a basic seat and a base arranged above the basic seat and movable forward and backward relative to the basic seat, the base is provided with a drilling device and a welding device in sequence, the welding device comprises a transverse support frame and a pipe adding clamping and moving unit and a heating mold moving unit arranged on the transverse support frame, the pipe adding clamping and moving unit comprises a pipe adding fixture and a first driving structure fixedly arranged on the transverse support frame and capable of controlling the pipe adding fixture to move up and down, the heating mold moving unit comprises a horizontal moving plate driven by a second driving structure arranged on the transverse support frame and a heating mold arranged below the horizontal moving plate and driven by a third driving structure arranged on the horizontal moving plate and capable of moving up and down relative to the horizontal moving plate, the heating mold comprises a support plate and an upper mold and a lower mold integrally formed on the support plate, the structure of the upper mold matches the lower end connecting end of the pipe adding fixture, and the structure of the lower mold matches the opening end surface structure of the pipe fitting; A sixth driving structure is fixed on the basic seat, and the bottom plate is driven by the sixth driving structure to achieve forward and backward movement relative to the basic seat; A welding inner support device is provided in cooperation with the lower die and can be placed in the pipeline opening. The welding inner support device includes a base and a top plate arranged on the top of the base. The top plate and the base are connected through a third cylinder fixed on the base. The top plate is arranged on the movable end of the third cylinder. The top plate is an arc-shaped structure adapted to the inner wall of the pipeline opening, and a cylindrical positioning column is arranged at the top center of the top plate. In cooperation with the positioning column, there is provided an upper cover which can be snapped onto the pipeline opening and can cover the positioning column. The upper cover is a cylindrical structure, and the top of the upper cover is a conical cavity.

2. The composite pipe drilling and welding machine according to claim 1, characterized in that: A horizontally parallel rack and two first linear guide rails are fixedly provided above the bottom pipe fixing frame. A gear driven by a seventh driving structure on the fixed basic frame and meshing with the rack on the bottom pipe fixing frame is provided below the basic seat of the drilling and welding integrated assembly. A groove cooperating with the two first linear guide rails is also fixedly provided below the basic seat of the drilling and welding integrated assembly.

3. The composite pipe drilling and welding machine according to claim 1, characterized in that: The bottom pipe fixing frame includes a base frame and a side frame. A plurality of arc-shaped grippers are evenly arranged on one side of the top of the base frame, and the other side is connected to the side frame. The arc-shaped grippers are connected to the base frame through a pin shaft and a first cylinder. The first cylinder drives the opening and closing of the arc-shaped grippers. Each arc-shaped gripper is provided with a push plate, which is arranged on the side frame through a screw rod. A rotating wheel for rotating the screw rod is arranged on the screw rod. A plurality of top tube plates are evenly arranged on the base frame, and the top tube plates are located in the center of the base frame. The top tube plates are connected to the base frame through a second cylinder.

4. The composite pipe drilling and welding integrated machine according to claim 1, characterized in that: Two guide rods are provided on both sides of the first driving structure and vertically penetrate the horizontal support frame. The upper end of the additional tube clamp is connected to the lower ends of the two guide rods. A fourth driving structure is also fixedly provided on the additional tube clamp and the opening and closing of the additional tube clamp is controlled by the fourth driving structure.

5. The composite pipe drilling and welding machine according to claim 1, characterized in that: The drilling device includes a connecting plate connected to the base and a back plate driven by a fifth driving structure arranged on the connecting plate and can move up and down along the connecting plate. A punching mechanism is fixed on the back plate. The punching mechanism includes a motor fixed on the back plate and a drill bit arranged at the lower end of the motor and driven to rotate by the motor.

6. A process for hole welding using the drilling and welding machine according to any one of claims 1 to 5, characterized in that: The steps are as follows: 1) Fix the pipe with the bottom pipe fixing frame; 2) Move the drilling and welding integrated assembly to the position where the pipe needs to be drilled; 3) Drill holes in the pipeline using a drilling device; 4) The fixture on the additional tube clamping moving unit clamps the additional tube, and the drilling and welding integrated assembly moves to keep the lower end face of the additional tube perpendicular to the opening end face of the pipeline; 5) Adjust the position of the heating mold on the heating mold moving unit, move it to the bottom of the additional tube, and continue to move until the lower mold is attached to the end face of the pipe opening. After the heating mold has finished moving down, control the additional tube clamp to move downward so that the bottom of the additional tube is in close contact with the upper mold of the heating mold, and then heat the bottom of the additional tube and the end face of the pipe opening at the same time; 6) After the heating time is met, lift up the additional tube, remove the heating mold, and then quickly press the additional tube down to the end face of the hole through the additional tube clamping moving unit, and maintain the pressure until cooling so that the additional tube and the end face of the hole form a smooth whole; 7) Release and reset the additional pipe clamp to complete the additional pipe welding; 8) After completing the drilling and welding at one position, the integrated drilling and welding assembly continues to move the required distance relative to the bottom pipe fixture, so that holes can be drilled and welded continuously on the pipe as needed.

7. The process of opening welding according to claim 6, characterized in that: After the hole is opened in step 3), a welding inner support device is pushed from the pipeline entrance into the opening in the pipeline. The welding inner support device includes a base and a top plate arranged on the top of the base. The top plate and the base are connected by a third cylinder fixed on the base. The top plate is arranged on the movable end of the third cylinder. The top plate is an arc-shaped structure adapted to the inner wall of the pipeline opening, and a cylindrical positioning column is arranged at the top center of the top plate. Then, the top plate with the positioning column is lifted by the cylinder so that the top plate fits the inner surface of the pipeline at the opening and the positioning column is fixed to the top plate. The column extends from the opening; then the upper cover that can be snapped onto the pipe opening and can cover the positioning column is put on the positioning column extending from the opening, and the position of the positioning column is guided so that the positioning column is exactly in the middle of the hole; after completing the positioning column guidance, remove the upper cover to prepare for the heating mold to heat the end face of the opening. At that time, the heating mold moves down and the positioning column is inserted into the lower mold of the heating mold. Under the action of the lining of the top plate and the positioning column, the combination of the increased pipe and the end face of the opening after welding is smoother. After step 7 is completed, take out the welding inner support device.

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