WO2023231266A1 - Heating and ventilation metal pipeline repair device - Google Patents

Abstract

A heating and ventilation metal pipeline repair device, which comprises a housing (1). Four first rotating grooves (2) are provided at the upper end of the housing (1). A first fixing block (3) is fixedly arranged on each of the first rotating grooves (2). A first rotating rod (4) is rotatably arranged on each first fixing block (3). A clamping arm set is arranged on each first rotating rod (4). A second fixing block (5) is fixed arranged on the housing (1). A first sliding groove (6) is provided on the second fixing block (5). A first electromagnetic sliding block (7) is slidably arranged in the first sliding groove (6). A first connecting block (8) is fixedly arranged below the first electromagnetic sliding block (7). The first connecting block (8) is connected to a first sliding block (9). A second rotating rod (10) is rotatably arranged on the first sliding block (9).

Description

HVAC metal pipe repair device Technical field

The invention belongs to the technical field of metal pipe repair, and in particular relates to a heating and ventilation metal pipe repair device.

Background technique

HVAC metal ducts are made of stainless steel. Usually when connecting, both ends of the air duct are always externally connected to fittings. Generally, there are no grooves at both ends of the HVAC duct and there are sealing rings. HVAC ducts have a very wide range of applications, including purification system return ducts, central air conditioning ventilation ducts, industrial air supply and exhaust ventilation ducts, environmental protection system suction and exhaust ducts, mining gas drainage pipes, mining tape-coated air ducts, etc. When HVAC metal pipes are used for a long time, they may be damaged and leaked due to corrosion and other conditions. The common repair method is for workers to find the damaged area and then weld the pipe there, which is time-consuming and labor-intensive.

Contents of the invention

The purpose of the present invention is to solve the above-mentioned problems in the existing technology and propose a heating and ventilation metal pipe repair device that can find the damaged part of the pipe and perform temporary and rapid repair.

The object of the present invention can be achieved through the following technical solutions: a heating and ventilation metal pipe repair device, including a shell, the upper end of the shell is provided with four first rotation grooves, and a fixed device is fixed on each of the first rotation grooves. There is a first fixed block, a first rotating rod is rotated on each first fixed block, a clamp arm group is provided on each first rotating rod, and a second fixed block is fixed on the housing. , a first sliding groove is provided on the second fixed block, a first electromagnetic slider is slidably provided in the first sliding groove, and a first connecting block is fixedly provided below the first electromagnetic slider. A connecting block is connected to a first slide block, a second rotating rod is rotated on the first sliding block, an arc-shaped block is connected to one end of the second rotating rod away from the housing, and a third rotating rod is provided below the housing. Three slots, two first spring telescopic rods are provided in the third slot, a first base is provided at the bottom of each first spring telescopic rod, and a first pulley is provided for rotating on each first base. .

Preferably, each clamp arm group includes a first round rod, each first round rod is connected to the first rotating rod through a first sleeve, and one end of each first round rod is fixedly connected with L A shaped second sleeve, one end of each second sleeve is fixedly connected to a second round rod, one end of each second round rod is connected to a second base, and the upper end of each second base is provided with There is a third motor, a fifth slot is provided in each second base, two second pulleys are provided for rotation in each fifth slot, and an output shaft of each third motor extends into the third motor. The second base is connected to the second pulley. The clamp arm group allows the device to have sufficient power when moving forward on the pipeline. When encountering some slightly larger obstacles, the device can still move through the rotation of the first rotating rod. Moving on, the stability and usefulness of the device is increased.

Preferably, a sixth arc-shaped groove is provided in the arc-shaped block, a first arc-shaped hydraulic chamber is fixedly provided in the sixth arc-shaped groove, and a pressure detector is fixedly provided below the first arc-shaped hydraulic chamber. , two first piston blocks are slidably provided in the first arc-shaped hydraulic chamber, each first piston block is fixedly provided with a first arc-shaped connecting rod, and a symmetrical sliding device is provided in the sixth arc-shaped groove. There are two first arc-shaped plates, each of the first arc-shaped plates is provided with a seventh arc-shaped groove, each of the seventh arc-shaped grooves is provided with a second slider, and each of the second arc-shaped plates is provided with a second slide block. The slide block is fixedly connected to the first arc-shaped connecting rod. Each second slide block is connected to the bottom wall of the seventh arc-shaped groove with a spring. The bottom end of the first arc-shaped plate is provided with a lock. When the pressure detector detects a pressure signal, the block and the first arc-shaped plate can be initially locked through the lock, so that the broken pipe can be quickly sealed and the repair speed can be improved.

Preferably, two one-way oil inlet valves are provided at the upper end of the first arc-shaped hydraulic chamber, a first oil storage chamber is provided in the arc-shaped block, and two third oil storage chambers are symmetrically provided in the first oil storage chamber. An oil outlet, each first oil outlet is provided with a second piston block, each second piston block is connected to the bottom wall of the first oil outlet through a spring, and each first arc-shaped A second oil storage cavity is provided in the plate, and a second trapezoidal oil outlet is provided near the first oil outlet of each first arc-shaped plate. The arc-shaped block and the first arc-shaped plate are in contact with the pipeline. The bottom walls are all made of soft materials. The arc-shaped block and the first arc-shaped plate are of the same height as the bottom wall in contact with the pipeline. The arc-shaped block and the soft bottom wall of the first arc-shaped plate are in the oil storage chamber. It will expand under pressure, improving the sealing effect and improving the reliability of the device.

Preferably, a second sliding groove is provided in the second fixed block close to the first sliding groove, a first motor is slidably installed in the second sliding groove, and the output shaft of the first motor extends into the second rotating rod. A first gear is internally connected, and the first gear is fixedly arranged in the second rotating rod. A hydraulic pump is provided in the second fixed block. The hydraulic pump and the second rotating rod are connected through a first oil line, so The arc-shaped block is provided with a threaded sleeve at one end close to the housing, and the outer surface of the second rotating rod close to the threaded sleeve is provided with matching threads. Through the cooperative use of the threads on the second rotating rod and the threaded sleeve , so that the repair device can be separated from the fuselage after completion, making the equipment flexible and convenient.

Preferably, a third trapezoidal oil inlet is provided at the contact point between the arc-shaped block and the second rotating rod, and a third trapezoidal sealing block is provided in each third trapezoidal oil inlet. The three trapezoidal sealing blocks are provided with ejector pins. The bottom wall of the third trapezoidal oil inlet at the third trapezoidal sealing block is connected with a spring. The third trapezoidal oil inlet on the arc-shaped block is the first arc-shaped hydraulic chamber. The oil inlet, through the cooperation of the third trapezoidal sealing block and the third trapezoidal oil inlet, allows the hydraulic oil to smoothly enter the first arc-shaped hydraulic chamber through the oil line when the arc-shaped block is connected to the second rotating rod. When the shaped block and the second rotating rod are separated, the oil in the oil circuit will not leak, which improves the rationality of the device.

Preferably, a fourth arc-shaped groove is provided below the housing close to the third groove, a first grinding plate is slidably provided in the fourth arc-shaped groove, and a third grinding plate is provided on the outer side wall of the housing. Two motors, the output end of the second motor is engaged and connected with the outside of the first grinding plate. The inside of the first grinding plate is fixed with grinding heads evenly distributed in the circumferential direction. Through the grinding heads on the first grinding plate , so that the surface of the cracked pipe becomes smooth under the polishing head, so that the repair device can better fit on the pipe, enhancing its tightness and reliability. Preferably, two cameras are provided on the side wall of the housing close to the arc-shaped block. Through the cameras, workers can quickly find the pipe rupture and improve work efficiency.

Beneficial effects:

1. The present invention uses four sets of clamping arm groups and a rotating rod to enable the device to pass when encountering some smaller obstacles, thereby improving the flexibility of the device.

2. In the present invention, through the combined use of the grinding block and the closed arc-shaped block, the device can better fit the pipeline and enhance the sealing effect.

3. The present invention improves the sealing effect through the cooperative use of the hydraulic pump and the liquid storage chamber, and through the expansion of the soft surface.

4. In the present invention, through the cooperative use of the rotating rod and the nut sleeve, the device can be detached after completing the sealing, thereby enhancing the practicality.

Description of the drawings

The present invention will be further explained below in conjunction with the accompanying drawings and examples:

Figure 1 is an isometric structural schematic diagram of the present invention.

Figure 2 is a top structural schematic diagram of the present invention.

Figure 3 is a schematic cross-sectional structural diagram at A-A in Figure 2.

Figure 4 is a schematic cross-sectional structural diagram at B-B in Figure 2.

Figure 5 is a schematic cross-sectional structural diagram at C-C in Figure 2.

Figure 6 is a schematic structural diagram of a partial enlarged view of D in Figure 3.

Figure 7 is a schematic structural diagram of a partial enlarged view of position E in Figure 4.

Figure 8 is a schematic structural diagram of a partial enlarged view of F in Figure 3.

In the figure, the housing 1, the first rotating groove 2, the first fixed block 3, the first rotating rod 4, the second fixed block 5, the first sliding groove 6, the first electromagnetic slide block 7, the first connecting block 8, The first slide block 9, the second rotating rod 10, the second sliding groove 11, the first motor 12, the first gear 13, the arc block 14, the third groove 15, the first spring telescopic rod 16, the first base 17, First pulley 18, fourth arc groove 19, first grinding plate 20, second motor 21, first round rod 22, first sleeve 23, second sleeve 24, second round rod 25, second base 26. The third motor 27, the fifth groove 28, the second pulley 29, the sixth arc groove 30, the first arc hydraulic chamber 31, the first piston block 32, the first arc connecting rod 33, the first arc Plate 34, seventh arc groove 35, second slider 36, pressure detector 37, first oil storage chamber 38, first oil outlet 39, second piston block 40, second oil storage chamber 41, hydraulic pump 42. The first oil line 43, the threaded sleeve 44, the third trapezoidal oil inlet 45, the third trapezoidal sealing block 46, the thimble 47, the camera 48, the grinding head 49, and the one-way oil inlet valve 50.

Detailed ways

The following are specific embodiments of the present invention combined with the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "inner", "lower", etc. is based on the orientation or positional relationship shown in the drawings, or is the customary placement when the product of the invention is used. The orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used to differentiate descriptions and are not to be understood as indicating or implying relative importance.

With reference to Figures 1-8, a heating and ventilation metal pipe repair device includes a housing 1. Four first rotating grooves 2 are provided on the upper end of the housing 1, and a first fixing block 3 is fixed on each first rotating groove 2. , each first fixed block 3 is provided with a first rotating rod 4, each first rotating rod 4 is provided with a clamp arm group, and the housing 1 is fixed with a second fixed block 5. The second fixed block 5 A first sliding groove 6 is provided on the top. A first electromagnetic slider 7 is slidably provided in the first sliding groove 6. A first connection block 8 is fixedly provided below the first electromagnetic slider 7. The first connection block 8 is connected to a first The slider 9 has a second rotating rod 10 rotating on the first slider 9. An arc-shaped block 14 is connected to the end of the second rotating rod 10 away from the housing 1. A third slot 15 is provided below the housing 1. Two first spring telescopic rods 16 are provided in the groove 15. A first base 17 is provided at the bottom of each first spring telescopic rod 16, and a first pulley 18 is provided for rotation on each first base 17.

Further, with reference to Figures 1-8, each clamp arm group includes a first round rod 22. Each first round rod 22 is connected to the first rotating rod 4 through a first sleeve 23. Each first round rod 22 An L-shaped second sleeve 24 is fixedly connected to one end, a second round rod 25 is fixedly connected to one end of each second sleeve 24, and a second base 26 is connected to one end of each second round rod 25. A third motor 27 is provided at the upper end of the two bases 26. A fifth slot 28 is provided in each second base 26. Two second pulleys 29 are rotated in each fifth slot 28. Each third motor 27 is The output shaft extends into the second base 26 and is connected to the second pulley 29. The clamp arm group allows the device to have sufficient power when moving forward on the pipeline, and when encountering some slightly larger obstacles, it can be moved through the first rotating rod 4 Rotation allows the device to continue moving forward, increasing the stability and practicality of the device.

Further, with reference to Figures 1-8, a sixth arc-shaped groove 30 is provided in the arc-shaped block 14. A first arc-shaped hydraulic chamber 31 is fixed in the sixth arc-shaped groove 30, and the first arc-shaped hydraulic chamber 31 is fixed below. A pressure detector 37 is provided. Two first piston blocks 32 are slidably provided in the first arc-shaped hydraulic chamber 31. Each first piston block 32 is fixed with a first arc-shaped connecting rod 33 and a sixth arc-shaped groove. There are two first arc-shaped plates 34 sliding symmetrically within 30. Each first arc-shaped plate 34 is provided with a seventh arc-shaped groove 35, and each seventh arc-shaped groove 35 is provided with a second slider 36 for sliding movement. Each second slider 36 is fixedly connected to the first arc-shaped connecting rod 33. Each second slider 36 is connected to the bottom wall of the seventh arc-shaped groove 35 with a spring. The bottom end of the first arc-shaped plate 34 is provided with a lock. , the arc block 14 and the first arc plate 34 can be initially locked through the lock when the pressure detector 37 detects the pressure signal, so that the broken pipe can be quickly sealed and the repair speed can be improved.

Further, with reference to Figures 1-8, two one-way oil inlet valves 50 are provided at the upper end of the first arc-shaped hydraulic chamber 31, and a first oil storage chamber 38 is provided in the arc-shaped block 14. The first oil storage chamber 38 is symmetrical. There are two first oil outlets 39. Each first oil outlet 39 is provided with a second piston block 40. Each second piston block 40 is connected to the bottom wall of the first oil outlet 39 through a spring. A second oil storage chamber 41 is provided in the first arc plate 34. A second trapezoidal oil outlet 42 is provided in each first arc plate 34 close to the first oil outlet 39. The arc block 14 and the first arc The bottom wall of the curved plate 34 that contacts the pipe is made of soft material. The bottom wall of the curved block 14 and the first curved plate 34 that contacts the pipe are of the same height. The soft materials of the curved block 14 and the first curved plate 34 The bottom wall will expand under the pressure of the oil storage chamber, which improves the sealing effect and improves the reliability of the device.

Further, with reference to Figures 1-8, a second sliding groove 11 is provided in the second fixed block 5 close to the first sliding groove 6. A first motor 12 is slidably provided in the second sliding groove 11. The output shaft of the first motor 12 The first gear 13 extends into the second rotating rod 10 and is connected. The first gear 13 is fixedly arranged in the second rotating rod 10. A hydraulic pump 42 is provided in the second fixed block 5. The hydraulic pump 42 and the second rotating rod 10 Connected through the first oil line 43, the arc-shaped block 14 is provided with a threaded sleeve 44 at one end close to the housing 1, and the outer surface of the second rotating rod 10 close to the threaded sleeve 44 is provided with matching threads. Through the second rotating rod 10 The thread on 10 and the threaded sleeve 44 are used in conjunction, so that the repair device can be separated from the fuselage after completion, making the equipment flexible and convenient.

Further, with reference to Figures 1-8, a third trapezoidal oil inlet 45 is provided at the contact point between the arc block 14 and the second rotating rod 10, and a third trapezoidal sealing block is provided in each third trapezoidal oil inlet 45. 46. Each third trapezoidal sealing block 46 is provided with an ejector pin 47. A spring is connected to the bottom wall of the third trapezoidal oil inlet 45 at the third trapezoidal sealing block 46. The third trapezoidal oil inlet 45 on the arc block 14 is The oil inlet of the first arc-shaped hydraulic chamber 31 cooperates with the third trapezoidal sealing block 46 and the third trapezoidal oil inlet 45 so that the hydraulic oil can smoothly pass through the oil line when the arcuate block 14 is connected to the second rotating rod 10 Entering the first arc-shaped hydraulic chamber 31, when the arc-shaped block 14 and the second rotating rod 10 are separated, the oil in the oil circuit will not leak, which improves the rationality of the device.

Further, with reference to Figures 1-8, a fourth arc-shaped groove 19 is provided at the bottom of the housing 1 near the third groove 15. A first grinding plate 20 is slidably provided in the fourth arc-shaped groove 19. The outer side wall of the housing 1 A second motor 21 is provided on the top. The output end of the second motor 21 is engaged and connected with the outside of the first grinding plate 20. The inside of the first grinding plate 20 is fixed with grinding heads 21 evenly distributed in the circumferential direction. Through the first grinding The grinding head 49 on the plate 20 makes the surface of the cracked pipe smooth under the grinding of the grinding head 49, so that the repair device can better fit on the pipe and enhance its sealing and reliability.

Further, with reference to Figures 1-8, two cameras 48 are provided on the side wall of the housing 1 close to the arc block 14. Through the cameras 48, the staff can quickly find the pipe rupture and improve work efficiency.

Initial state:

The staff determines the approximate location of the pipeline rupture, and then manually installs the equipment at a nearby pipeline. At this time, the first arc plate 34 is retracted within the arc block 14 .

working principle:

Start the equipment, the camera 48 is turned on, and the third motor 27 starts to rotate, thereby driving the second pulley 29 connected to the output shaft of the third motor 27 to rotate, thereby driving the entire device to advance on the pipeline. When the leakage on the pipeline is seen through the camera 48 When, the third motor 27 stops working, and the arc block 14 stops near the leakage point.

At this time, the hydraulic pump 42 is working, so that the oil in the hydraulic pump 42 is injected into the first arc-shaped hydraulic chamber 31 through the first oil passage 43, causing the first piston block 32 to slide, causing the oil fixed on the first piston block 32 to slide. The first arc-shaped connecting rod 33 pushes the first arc-shaped plate 34 to move downward, and finally closes. At this time, the arc-shaped block 14 and the groove in the first arc-shaped plate 34 form a closed space. At this time, if the pipeline is broken, , the pressure detector 37 will receive the pressure signal from the pipeline and determine the rupture position. If it is not the rupture position, the first arc plate 34 will shrink into the arc block 14, then adjust the position, and perform the above movement again. .

When the rupture position is determined, the first arc plate 34 will shrink into the arc block 14, and then the third motor 27 starts to rotate, causing the first grinding plate 20 in the device to move to this position and stop. The second motor 21 starts to rotate, causing the first grinding plate 20 that is meshed with the output shaft of the second motor 21 to start sliding. During the sliding process, the grinding head 49 on the first grinding plate 20 will rub against the pipe, and the debris on the pipe will be removed. , the rust, etc. are removed cleanly and the pipe becomes flat. After repeated polishing, the third motor 27 is reversed to return the device to its original position.

At this time, the hydraulic pump 42 continues to work. When the first arc plate 34 is closed, under the action of the hydraulic pump 42, the second slider 36 will be pushed to the bottom in the seventh arc groove 35. Under the elastic force of the spring, Under the action, the closing effect of the first arc-shaped plate 34 is better, because the groove in the arc-shaped block 14 and the first arc-shaped plate 34 is a closed space at this time, so under the pressure of the leakage point of the leakage pipe, it will The one-way oil inlet valve 50 is opened. At this time, the oil in the oil circuit will enter the first oil storage chamber 38, and the oil will enter the second oil storage chamber 41 through the first oil outlet 39, because it is connected with the pipeline. The bottom walls in contact are all soft materials. With continuous oil inflow, the bottom wall will expand and become larger until the oil storage chamber reaches a saturated state. At this time, the grooves in the arc block 14 and the first arc plate 34 are Completely sealed.

When the completely sealed state is reached, the hydraulic pump 42 stops working. At this time, the arc block 14 is fixed on the pipe, so the first motor 12 starts to rotate, driving the second rotating rod 10 to rotate, causing the second rotating rod 10 to rotate. Disengage the threaded sleeve 44 along the spiral direction. At this time, the ejector pin 47 and the third trapezoidal sealing block 46 are no longer in contact. The third trapezoidal sealing block 46 fits the third trapezoidal oil inlet 45 under the action of the spring elastic force, so that the device is in contact with the arc. When the shape block 14 is detached, the oil inlet is sealed, so that no waste of hydraulic oil is caused.

If there is a bump or small obstacle on the pipe during movement, the first rotating rod 4 will rotate at this time, so that the second pulley 29 can continue to rotate according to the obstacle, and the first electromagnetic slider 7 It will also slide upward, driving the arc-shaped block 14 to slide upward and over obstacles, thereby driving the device to continue moving forward without being blocked. Under the buffering of the first pulley 18 on the first spring telescopic rod 16, the device will not be blocked when it encounters obstacles. The object can be made more stable and increase its stability.

The above descriptions are only examples of the present invention, and do not limit the scope of patent protection of the present invention. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present invention, or directly or indirectly applied to other related The technical fields are all equally included in the scope of patent protection of the present invention.

Claims (8)

A heating and ventilation metal pipe repairing device includes a shell (1). Four first rotation grooves (2) are provided on the upper end of the shell (1). Each of the first rotation grooves (2) is fixed with There is a first fixed block (3), each first fixed block (3) is provided with a first rotating rod (4), and each first rotating rod (4) is provided with a clamping arm group. The housing (1) is fixed with a second fixed block (5), the second fixed block (5) is provided with a first sliding groove (6), and the first sliding groove (6) slides inside A first electromagnetic slider (7) is provided. A first connection block (8) is fixed below the first electromagnetic slider (7). The first connection block (8) is connected to a first slider (9). ), the first slider (9) is provided with a second rotating rod (10), and an arc-shaped block (14) is connected to one end of the second rotating rod (10) away from the housing (1), so A third slot (15) is provided below the housing (1), and two first spring telescopic rods (16) are provided in the third slot (15). Each of the first spring telescopic rods (16) A first base (17) is provided at the bottom end, and a first pulley (18) is provided for rotation on each first base (17). An HVAC metal pipe repairing device according to claim 1, characterized in that each clamp arm group includes a first round rod (22), and each first round rod (22) is connected to a first round rod (22). The rotating rod (4) is connected through a first sleeve (23). One end of each first round rod (22) is fixedly connected with an L-shaped second sleeve (24). Each second sleeve One end of (24) is fixedly connected with a second round rod (25), one end of each second round rod (25) is connected with a second base (26), and the upper end of each second base (26) is provided with There is a third motor (27), a fifth slot (28) is provided in each second base (26), and two second pulleys (29) are provided for rotation in each fifth slot (28). , the output shaft of each third motor (27) extends into the second base (26) and is connected to the second pulley (29). A heating and ventilation metal pipe repair device according to claim 1, characterized in that a sixth arc-shaped groove (30) is provided in the arc-shaped block (14), and the sixth arc-shaped groove (30) A first arc-shaped hydraulic chamber (31) is fixedly provided inside, a pressure detector (37) is fixedly provided below the first arc-shaped hydraulic chamber (31), and a sliding device is provided inside the first arc-shaped hydraulic chamber (31). There are two first piston blocks (32). A first arc-shaped connecting rod (33) is fixed on each first piston block (32). A symmetrical sliding device is provided in the sixth arc-shaped groove (30). There are two first arc-shaped plates (34). Each first arc-shaped plate (34) is provided with a seventh arc-shaped groove (35). Each of the seventh arc-shaped grooves (35) is provided with a sliding mechanism. There are second slide blocks (36), each second slide block (36) is fixedly connected to the first arc-shaped connecting rod (33), and each second slide block (36) is connected to the seventh arc-shaped groove. (35) The bottom wall is connected with a spring, and the bottom end of the first arc plate (34) is provided with a lock. A heating and ventilation metal pipe repair device according to claim 3, characterized in that two one-way oil inlet valves (50) are provided at the upper end of the first arc-shaped hydraulic chamber (31), and the arc-shaped block (14) is provided with a first oil storage chamber (38), and two first oil outlets (39) are symmetrically provided in the first oil storage chamber (38). Each of the first oil outlets (39) 39) is provided with a second piston block (40), each second piston block (40) is connected to the bottom wall of the first oil outlet (39) through a spring, and each first arc plate (34 ) is provided with a second oil storage chamber (41), and each first arc-shaped plate (34) is provided with a second trapezoidal oil outlet (42) close to the first oil outlet (39). The bottom wall of the shaped block (14) and the first arc-shaped plate (34) in contact with the pipeline is made of soft material. The bottom wall of the arc-shaped block (14) and the first arc-shaped plate (34) in contact with the pipeline, etc. high. A heating and ventilation metal pipe repairing device according to claim 4, characterized in that a second sliding groove (11) is opened in the second fixed block (5) close to the first sliding groove (6), so A first motor (12) is slidably provided in the second sliding groove (11). The output shaft of the first motor (12) extends into the second rotating rod (10) and is connected to a first gear (13). The first gear (13) is fixedly arranged in the second rotating rod (10), and a hydraulic pump (42) is provided in the second fixed block (5). The hydraulic pump (42) and the second rotating rod (10) ) is connected through the first oil passage (43), the arc-shaped block (14) is provided with a threaded sleeve (44) at one end close to the housing (1), and the second rotating rod (10) is close to the threaded sleeve (44) ) side outer surface is provided with matching threads. A heating and ventilation metal pipe repairing device according to claim 5, characterized in that a third trapezoidal oil inlet (45) is provided at the contact point between the arc-shaped block (14) and the second rotating rod (10). ), each third trapezoidal oil inlet (45) is provided with a third trapezoidal sealing block (46), and each third trapezoidal sealing block (46) is provided with an ejector pin (47). A spring is connected to the bottom wall of the third trapezoidal oil inlet (45) of the three-trapezoid sealing block (46), and the third trapezoidal oil inlet (45) on the arc-shaped block (14) is the first arc-shaped hydraulic chamber ( 31) oil inlet. A heating and ventilation metal pipe repairing device according to claim 1, characterized in that a fourth arc-shaped groove (19) is provided below the housing (1) close to the third groove (15). A first grinding plate (20) is slidably provided in the fourth arc-shaped groove (19), and a second motor (21) is provided on the outer side wall of the housing (1). The second motor (21) The output end is engaged and connected with the outer side of the first grinding plate (20). The inner side of the first grinding plate (20) is fixed with grinding heads (21) evenly distributed in the circumferential direction. A heating and ventilation metal pipe repairing device according to claim 1, characterized in that two cameras (48) are provided on the side wall of the housing (1) close to the arc-shaped block (14).

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