HVAC pipe laying device and method of using the same

Abstract

The present invention discloses a HVAC pipe laying device and a method of using the same, and belongs to the technical field of HVAC pipe installation. A HVAC pipe laying device comprises: a square fixed plate, a first gear ring, a second gear ring, a first arc-shaped bracket, a second arc-shaped bracket, a clutch mechanism, four fixed rods, a first rotating shaft and a second rotating shaft. The four fixed rods are respectively fixedly connected to the four corners of one end of the fixed plate, and the side walls of the fixed rods are each provided with a first groove; a first sliding rod, a second sliding rod, a third sliding rod and a fourth sliding rod are respectively embedded in the four first grooves, and are respectively slidably connected to the inner side walls of the four first grooves. The HVAC pipe laying device and the method of using the same provided by the present invention can automatically adjust the installation height, as well as the position of the HVAC pipe and the angle with the roof, so as to solve the problem of manual vertical transportation and inconvenient position adjustment of a single-section pipe.

Description

Technical Field

[0001] The invention belongs to the technical field of HVAC pipe installation, and in particular relates to a HVAC pipe laying device and a use method thereof. Background Art

[0002] HVAC pipes are widely used, such as purification system return air ducts, central air conditioning ventilation ducts, industrial supply and exhaust ventilation ducts, environmental protection system suction and exhaust ducts, mining gas extraction pipes, mining rubberized cloth air ducts, etc. HVAC pipes have the advantages of good sealing, good strength and rigidity, small ventilation resistance, and low ventilation noise.

[0003] However, since HVAC pipes are large in size and usually need to be installed on higher ceilings, it is inconvenient to adjust the angle and position of a single section of HVAC pipe during installation. It is not easy to solve the above problems using existing technologies to lay HVAC pipes. Summary of the invention

[0004] In view of the deficiencies in the prior art, an object of the present invention is to provide a HVAC pipe laying device and a method of using the same.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A HVAC pipe laying device includes: a square fixed plate, a first gear ring, a second gear ring, a first arc-shaped bracket, a second arc-shaped bracket, a clutch mechanism, four fixed rods, a first rotating shaft and a second rotating shaft. The four fixed rods are respectively fixedly connected to the four corners of one end of the fixed plate, and the side walls of the fixed rods are each provided with a first groove; a first sliding rod, a second sliding rod, a third sliding rod and a fourth sliding rod are respectively embedded in the four first grooves and are respectively slidably connected to the inner side walls of the four first grooves; the first gear ring is located between the first sliding rod and the second sliding rod, and the second gear ring is located between the third sliding rod and the fourth sliding rod; the end of the first gear ring away from the second gear ring is fixedly connected to the first support plate, and the end of the second gear ring away from the first gear ring is fixedly connected to the second support plate;

[0007] The first rotating shaft passes through the first supporting plate and is rotatably connected to the first supporting plate; the other end of the first rotating shaft is coaxially fixedly connected to the first main gear, and two first sub-gears are provided, both of which are meshed with the first main gear, and the centers of the first main gear and the two first sub-gears are on the same straight line; the two first sub-gears are meshed with the internal teeth of the first gear ring, and one end of the first gear ring close to the first supporting plate is fixedly provided with a first screw rod support and a first sliding rod support; a first screw rod is provided and threadedly connected to the first screw rod support; the two ends of the first screw rod respectively pass through the first sliding rod and the second sliding rod, and the two ends of the first screw rod are respectively rotatably connected to the first sliding rod and the second sliding rod; one end of the first screw rod is coaxially fixedly connected to the first sprocket; a first sliding rod is provided and slidably connected to the first sliding rod support, and the two ends of the first sliding rod are respectively fixedly connected to the first sliding rod and the second sliding rod;

[0008] The cam is an angularly-shaped member which is arranged on a pair of camshafts, wherein the camshafts are arranged on a pair of camshafts, and the camshafts are connected to each other with a toothed wheel. The camshafts are connected by a toothed wheel to form a pair of camshafts, wherein the toothed wheel is engaged with the first and second teeth of the camshafts.

[0009] The two first sub-gears and the two second sub-gears are respectively fixedly connected coaxially through two first fixed shafts; both ends of the first and second arc-shaped brackets are provided with through holes; the two first fixed shafts respectively pass through the through holes at both ends of the first arc-shaped bracket; at the same time, the two first fixed shafts respectively pass through the through holes at both ends of the second arc-shaped bracket.

[0010] Furthermore, two rotating supports are fixedly connected in the middle of the lower end of the fixed plate, and the first motor is fixedly connected to one of the rotating supports; a third rotating shaft and a fourth rotating shaft are provided, which are respectively rotatably connected to the two rotating supports, and the third rotating shaft is transmission connected to the first motor; the third rotating shaft is parallel to the fourth rotating shaft; the two ends of the third rotating shaft are coaxially fixedly connected with the first gear and the second gear, and the two ends of the fourth rotating shaft are coaxially fixedly connected with the third gear and the fourth gear; the first gear is meshed with the third gear, and the second gear is meshed with the fourth gear; the first rack, the second rack, the third rack and the fourth rack are respectively fixedly installed on the side walls of the first sliding rod, the second sliding rod, the third sliding rod and the fourth sliding rod; the first rack is meshed with the first gear, the second rack is meshed with the second gear, the third rack is meshed with the third gear, and the fourth rack is meshed with the fourth gear.

[0011] Furthermore, the end of the first screw rod away from the first sprocket is coaxially fixedly connected with the first spur gear; a second motor is fixedly installed on the side wall of the first sliding rod, one end of the second motor is transmission-connected with a transmission shaft, a second spur gear is provided and connected to the transmission shaft through a spline, and the end of the second spur gear away from the second motor is coaxially fixedly connected with a separation bearing, and the inner wall of the separation bearing does not contact the outer wall of the transmission shaft; the first spur gear can mesh with the second spur gear.

[0012] Furthermore, one end of the first rotating shaft away from the second supporting plate is coaxially fixedly connected with a worm gear, a worm is provided to mesh with the worm gear, one end of the worm is coaxially fixedly connected with a third spur gear, and the third spur gear can mesh with the second spur gear;

[0013] Furthermore, the transmission shaft, the worm and the first lead screw are parallel to each other, and the first spur gear and the third spur gear are no longer in the same plane.

[0014] Furthermore, a second fixed shaft is fixedly installed on the side wall of the first sliding rod, a sleeve is sleeved on the second fixed shaft, and the sleeve is slidably connected to the second fixed shaft; a shift fork is fixedly provided on the side wall of the sleeve, the shift fork clamps the release bearing, and the shift fork can control the movement of the release bearing along the axial direction of the transmission shaft.

[0015] Furthermore, a compression spring is wound around the outside of the second fixed shaft, one end of the compression spring is fixedly connected to the side wall of the first sliding rod, and the other end of the compression spring is fixedly connected to one end of the sleeve; a thread is opened on the end of the second fixed shaft away from the first sliding rod, and a first nut is provided which is threadedly connected to one end of the second fixed shaft, and one end of the first nut is fitted with the end of the sleeve away from the compression spring.

[0016] Furthermore, the first sprocket and the second sprocket have the same outer diameter and the same number of teeth.

[0017] Furthermore, a thread is formed on the side wall of the first fixed shaft, and two second nuts are provided between the two ends of the first arc-shaped bracket and the two first sub-gears, and the two second nuts are threadedly connected to the two first fixed shafts respectively; two third nuts are provided between the two ends of the second arc-shaped bracket and the two second sub-gears, and the two third nuts are threadedly connected to the two first fixed shafts respectively.

[0018] Furthermore, the method for using the HVAC pipe laying device includes the following steps: installing the fixing plate on the ceiling, turning on the first motor, synchronously adjusting the first sliding rod, the second sliding rod, the third sliding rod and the fourth sliding rod to a height from the ground that is convenient for installing the HVAC pipe, and then turning off the first motor; inserting the HVAC pipe into the circular channel formed by the first arc bracket and the second arc bracket, screwing the second nut and the third nut to fix the HVAC pipe; turning on the first motor again, synchronously adjusting the first sliding rod, the second sliding rod, the third sliding rod and the fourth sliding rod to a position that is convenient for connecting the HVAC pipe with other sections of the HVAC pipe; controlling the second spur gear to engage with the first spur gear or the third spur gear, turning on the second motor, and adjusting the position or angle of the fixed HVAC pipe so that the HVAC pipe can be easily connected with other sections of the HVAC pipe.

[0019] Beneficial effects of the present invention:

[0020] The present invention provides a HVAC pipe laying device and a method of using the device, which can automatically adjust the installation height, as well as the position of the HVAC pipe and the angle with the roof, thereby solving the problem of manual vertical transportation and inconvenient position adjustment of a single-section pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the device of the present invention;

[0023] Figure 2 The present invention Figure 1Schematic diagram of the local structure at B in the middle;

[0024] Figure 3 is a schematic diagram of the three-dimensional structure of the device of the present invention from another viewing angle;

[0025] Figure 4 It is a schematic diagram of a partial three-dimensional structure of the device of the present invention;

[0026] Figure 5 It is a schematic diagram of the local structure of the device of the present invention;

[0027] Figure 6 It is a partial structural cross-sectional view of the device of the present invention;

[0028] Figure 7 It is another partial structural plan schematic diagram of the device of the present invention;

[0029] The components corresponding to the numbers in the figure are as follows:

[0030] 1. Fixed plate; 2. Fixed rod; 3. Second sliding rod; 4. First screw rod; 5. Chain; 6. First sprocket; 7. Worm; 8. Worm wheel; 9. First sliding rod support; 10. First sliding rod; 11. First gear ring; 12. First support plate; 13. First gear; 14. Second gear; 16. First motor; 17. First sliding rod; 18. First screw rod support; 19. Second motor; 20. Transmission shaft; 21. Second spur gear; 22. Third spur gear; 23. Release bearing ; 24. fork; 25. second fixed shaft; 26. first nut; 27. sleeve; 28. compression spring; 29. ​​second sub-gear; 30. first fixed shaft; 31. first main gear; 32. third sliding rod; 33. first straight gear; 34. first arc bracket; 35. second arc bracket; 36. second sprocket; 37. fourth rotating shaft; 39. fourth sliding rod; 40. third nut; 41. second nut; 42. second sliding rod; 43. second screw rod; 44. second gear ring. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0033] like Figures 1 to 7 As shown, a HVAC pipe laying device includes: a square fixed plate 1, a first gear ring 11, a second gear ring 44, a first arc-shaped bracket 34, a second arc-shaped bracket 35, a clutch mechanism, four fixed rods 2, a first rotating shaft and a second rotating shaft. The four fixed rods 2 are respectively fixedly connected to the four corners of one end of the fixed plate 1, and the side walls of the fixed rods 2 are each provided with a first groove; a first sliding rod 17, a second sliding rod 3, a third sliding rod 32, and a fourth sliding rod 39 are respectively embedded in the four first grooves and are respectively slidably connected to the inner side walls of the four first grooves; the first gear ring 11 is located between the first sliding rod 17 and the second sliding rod 3, and the second gear ring 44 is located between the third sliding rod 32 and the fourth sliding rod 39; the end of the first gear ring 11 away from the second gear ring 44 is fixedly connected to the first support plate 12, and the end of the second gear ring 44 away from the first gear ring 11 is fixedly connected to the second support plate;

[0034] The first rotating shaft passes through the first supporting plate 12 and is rotatably connected to the first supporting plate 12; the other end of the first rotating shaft is coaxially fixedly connected to a first main gear 31, and two first sub-gears are provided, both of which are meshed with the first main gear 31, and the centers of the first main gear and the two first sub-gears are on the same straight line; the two first sub-gears are meshed with the internal teeth of the first gear ring 11, and the first gear ring 11 is fixedly provided with a first screw support 18 and a first sliding rod support at one end close to the first supporting plate 12; a first screw rod 4 is provided and is threadedly connected to the first screw rod support 18; the two ends of the first screw rod 4 respectively pass through the first sliding rod 17 and the second sliding rod 3, and the two ends of the first screw rod 4 are rotatably connected to the first sliding rod 17 and the second sliding rod 3 respectively; one end of the first screw rod 4 is coaxially fixedly connected to a first sprocket 6; a first sliding rod 10 is provided and is slidably connected to the first sliding rod support, and the two ends of the first sliding rod 10 are fixedly connected to the first sliding rod 17 and the second sliding rod 3 respectively;

[0035] The second rotating shaft passes through the second supporting plate and is rotatably connected to the second supporting plate; the second rotating shaft is coaxially fixedly connected to a second main gear at one end close to the first supporting plate 12, and is provided with two second sub-gears 29 that are both meshed with the second main gear, and the centers of the second main gear and the two second sub-gears 29 are on the same straight line; the two second sub-gears 29 are both meshed with the inner teeth of the second gear ring 44, and a second screw rod 43 support and a second slide rod 42 support are fixedly provided at one end of the second gear ring 44 close to the second supporting plate; a second screw rod 43 support and a second slide rod 42 support are provided 43 is threadedly connected with the second screw rod 43 support, one end of the second screw rod 43 passes through the fourth sliding rod 39 and is rotatably connected thereto, and one end of the second screw rod 43 is coaxially fixedly connected with the second sprocket 36; the other end of the second screw rod 43 is rotatably connected with the third sliding rod 32, a second sliding rod 42 is provided to be slidably connected with the second sliding rod 42 support, and the two ends of the second sliding rod 42 are respectively fixedly connected with the third sliding rod 32 and the fourth sliding rod 39; the first sprocket 6 and the second sprocket 36 are connected by a chain 5;

[0036] The two first sub-gears and the two second sub-gears 29 are coaxially fixedly connected via two first fixed shafts 30 respectively; both ends of the first and second arc-shaped brackets are provided with through holes; the two first fixed shafts 30 respectively pass through the through holes at both ends of the first arc-shaped bracket 34; at the same time, the two first fixed shafts 30 respectively pass through the through holes at both ends of the second arc-shaped bracket 35.

[0037] Further, two rotating supports are fixedly connected to the middle of the lower end of the fixed plate 1, and the first motor 16 is fixedly connected to one of the rotating supports; a third rotating shaft and a fourth rotating shaft 37 are provided, which are respectively rotatably connected to the two rotating supports, and the third rotating shaft is transmission-connected to the first motor 16; the third rotating shaft is parallel to the fourth rotating shaft 37; the two ends of the third rotating shaft are respectively coaxially fixedly connected with the first gear 13 and the second gear 14, and the two ends of the fourth rotating shaft 37 are respectively coaxially fixedly connected with the third gear and the fourth gear; the first gear 13 is meshed with the third gear, and the second gear 14 is meshed with the fourth gear; the first rack, the second rack, the third rack and the fourth rack are respectively fixedly installed on the side walls of the first sliding rod 17, the second sliding rod 3, the third sliding rod 32 and the fourth sliding rod 39; the first rack is meshed with the first gear 13, the second rack is meshed with the second gear 14, the third rack is meshed with the third gear, and the fourth rack is meshed with the fourth gear.

[0038] Furthermore, the end of the first screw rod 4 away from the first sprocket 6 is coaxially fixedly connected with the first spur gear 33; a second motor 19 is fixedly installed on the side wall of the first sliding rod 17, one end of the second motor 19 is transmission-connected to the transmission shaft 20, a second spur gear 21 is provided and connected to the transmission shaft 20 through a spline, the end of the second spur gear 21 away from the second motor 19 is coaxially fixedly connected with a release bearing 23, and the inner wall of the release bearing 23 does not contact the outer wall of the transmission shaft 20; the first spur gear 33 can mesh with the second spur gear 21.

[0039] Furthermore, a worm gear 8 is coaxially fixedly connected to one end of the first rotating shaft away from the second supporting plate, a worm 7 is provided to mesh with the worm gear 8, and a third spur gear 22 is coaxially fixedly connected to one end of the worm 7, and the third spur gear 22 can mesh with the second spur gear 21;

[0040] Furthermore, the transmission shaft 20 , the worm 7 and the first screw 4 are parallel to each other, and the first spur gear 33 and the third spur gear 22 are not in the same plane.

[0041] Furthermore, a second fixed shaft is fixedly installed on the side wall of the first sliding rod 17, a sleeve is sleeved on the second fixed shaft, and the sleeve is slidably connected to the second fixed shaft; a shift fork is fixedly provided on the side wall of the sleeve, the shift fork clamps the release bearing 23, and the shift fork can control the movement of the release bearing 23 along the axial direction of the transmission shaft 20.

[0042] Furthermore, a compression spring is wound around the outside of the second fixed shaft, one end of the compression spring is fixedly connected to the side wall of the first sliding rod 17, and the other end of the compression spring is fixedly connected to one end of the sleeve; a thread is formed on the end of the second fixed shaft away from the first sliding rod 17, and a first nut is provided which is threadedly connected to one end of the second fixed shaft, and one end of the first nut is fitted with the end of the sleeve away from the compression spring.

[0043] Furthermore, the first sprocket 6 and the second sprocket 36 have the same outer diameter and the same number of teeth, so that the first screw rod 4 and the second screw rod 43 rotate synchronously at the same speed.

[0044] Furthermore, the side wall of the first fixed shaft 30 is threaded, and two second nuts 41 are provided between the two ends of the first arc-shaped bracket 34 and the two first sub-gears, and the two second nuts 41 are threadedly connected to the two first fixed shafts 30 respectively; two third nuts 40 are provided between the two ends of the second arc-shaped bracket 35 and the two second sub-gears 29, and the two third nuts 40 are threadedly connected to the two first fixed shafts 30 respectively.

[0045] Furthermore, the method for using the HVAC pipe laying device includes the following steps: installing the fixing plate 1 on the ceiling, turning on the first motor 16, synchronously adjusting the first sliding rod 17, the second sliding rod 3, the third sliding rod 32 and the fourth sliding rod 39 to a height from the ground that is convenient for installing the HVAC pipe, and then turning off the first motor 16; inserting the HVAC pipe into the circular channel formed by the first arc bracket 34 and the second arc bracket 35, screwing the second nut 41 and the third nut 40 to fix the HVAC pipe; turning on the first motor 16 again, synchronously adjusting the first sliding rod 17, the second sliding rod 3, the third sliding rod 32 and the fourth sliding rod 39 to a position that is convenient for connecting the HVAC pipe with other sections of the HVAC pipe; controlling the second spur gear 21 to mesh with the first spur gear 33 or the third spur gear 22, turning on the second motor 19, and adjusting the position or angle of the fixed HVAC pipe so that the HVAC pipe can be easily connected with other sections of the HVAC pipe.

[0046] Working principle:

[0047] During specific operation, when adjusting the height of the first sliding rod 17, the second sliding rod 3, the third sliding rod 32 and the fourth sliding rod 39 from the ground, turn on the first motor 16, the third rotating shaft rotates forward or reversely, and the first gear 13 and the second gear 14 at both ends of the third rotating shaft rotate accordingly, and respectively drive the third gear and the fourth gear to rotate, and then the first rack, the second rack, the third rack and the fourth rack respectively drive the first sliding rod 17, the second sliding rod 3, the third sliding rod 32 and the fourth sliding rod 39 to slide in the first groove.

[0048] When adjusting the position of the HVAC pipe, the first nut is turned, and the elastic force of the compression spring can be used to control the position of the sleeve on the second fixed shaft. The fork moves with the sleeve, and the second spur gear 21 can be controlled to mesh with the first spur gear 33. When the second spur gear 21 meshes with the first spur gear 33, the first spur gear 33 drives the first screw rod 4 to rotate, and the first sprocket wheel 6 at the other end of the first screw rod 4 controls the second sprocket wheel 36 to rotate through the transmission of the chain 5, thereby driving the second screw rod 43 to rotate; and then the HVAC pipe after being fixed can move along the axial direction of the first slide rod 10, so as to achieve the purpose of adjusting the appropriate position;

[0049] Similarly, when adjusting the angle of the HVAC pipe, the second spur gear 21 is controlled to mesh with the third spur gear 22, the second spur gear 21 drives the third spur gear 22 to rotate, the third spur gear 22 drives the worm 7 to rotate, the worm 7 drives the worm wheel 8 to rotate, the worm wheel 8 drives the first rotating shaft to rotate, the first rotating shaft drives the first main gear 31 to rotate, the two first sub-gears rotate around the first main gear 31, and through the transmission of the two first fixed shafts 30, the second main gear and the second sub-gear 29 move in the same way, so that the angle of the HVAC pipe after being fixed changes. Since the rotation of the first rotating shaft is directly controlled by the worm wheel 8 in the worm wheel 8 and worm 7 mechanism, it has a self-locking function, so that the angle of the HVAC pipe will not change due to its own gravity.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0051] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A HVAC pipe laying device, characterized in that: include: A square fixing plate, a first gear ring, a second gear ring, a first arc-shaped bracket, a second arc-shaped bracket, a clutch mechanism, four fixing rods, a first rotating shaft and a second rotating shaft; The four fixing rods are respectively fixedly connected to the four corners of one end of the fixing plate, and the side walls of the fixing rods are each provided with a first groove; a first sliding rod, a second sliding rod, a third sliding rod, and a fourth sliding rod are respectively embedded in the four first grooves, and are respectively slidably connected to the inner side walls of the four first grooves; the first gear ring is located between the first sliding rod and the second sliding rod, and the second gear ring is located between the third sliding rod and the fourth sliding rod; the end of the first gear ring away from the second gear ring is fixedly connected to the first support plate, and the end of the second gear ring away from the first gear ring is fixedly connected to the second support plate; The first rotating shaft passes through the first supporting plate and is rotatably connected to the first supporting plate; the other end of the first rotating shaft is coaxially fixedly connected to the first main gear, and two first sub-gears are provided, both of which are meshed with the first main gear, and the centers of the first main gear and the two first sub-gears are on the same straight line; the two first sub-gears are meshed with the internal teeth of the first gear ring, and one end of the first gear ring close to the first supporting plate is fixedly provided with a first screw rod support and a first sliding rod support; a first screw rod is provided and threadedly connected to the first screw rod support; the two ends of the first screw rod respectively pass through the first sliding rod and the second sliding rod, and the two ends of the first screw rod are respectively rotatably connected to the first sliding rod and the second sliding rod; one end of the first screw rod is coaxially fixedly connected to the first sprocket; a first sliding rod is provided and slidably connected to the first sliding rod support, and the two ends of the first sliding rod are respectively fixedly connected to the first sliding rod and the second sliding rod; The cam is an angularly-shaped member which is arranged on a pair of camshafts, wherein the camshafts are arranged on a pair of camshafts, and the camshafts are connected to each other with a toothed wheel. The camshafts are connected by a toothed wheel to form a pair of camshafts, wherein the toothed wheel is engaged with the first and second teeth of the camshafts. The two first sub-gears and the two second sub-gears are respectively fixedly connected coaxially through two first fixed shafts; both ends of the first and second arc-shaped brackets are provided with through holes; the two first fixed shafts respectively pass through the through holes at both ends of the first arc-shaped bracket; at the same time, the two first fixed shafts respectively pass through the through holes at both ends of the second arc-shaped bracket; The gear train is a gear that is coupled to the first gear and the gear is coupled to the first gear, and the gear train is a gear that is coupled to the first gear and the gear is coupled to the first gear. The first screw rod is coaxially fixedly connected to the first sprocket at one end thereof; a second motor is fixedly mounted on the side wall of the first sliding rod; one end of the second motor is transmission-connected to a transmission shaft, a second spur gear is provided, and is spline-connected to the transmission shaft; a separation bearing is coaxially fixedly connected to the second spur gear at one end thereof away from the second motor, and the inner wall of the separation bearing does not contact the outer wall of the transmission shaft; the first spur gear can mesh with the second spur gear; A worm gear is coaxially fixedly connected to one end of the first rotating shaft away from the second supporting plate, and a worm is provided to mesh with the worm gear. A third spur gear is coaxially fixedly connected to one end of the worm gear, and the third spur gear can mesh with the second spur gear. The transmission shaft, the worm and the first lead screw are parallel to each other, and the first spur gear and the third spur gear are not in the same plane; A second fixed shaft is fixedly mounted on the side wall of the first sliding rod, a sleeve is sleeved on the second fixed shaft, and the sleeve is slidably connected to the second fixed shaft; a shift fork is fixedly mounted on the side wall of the sleeve, the shift fork clamps the release bearing, and the shift fork can control the movement of the release bearing along the axial direction of the transmission shaft; A compression spring is wound around the second fixed shaft, one end of the compression spring is fixedly connected to the side wall of the first sliding rod, and the other end of the compression spring is fixedly connected to one end of the sleeve; a thread is formed on the end of the second fixed shaft away from the first sliding rod, and a first nut is provided which is threadedly connected to one end of the second fixed shaft, and one end of the first nut is fitted with the end of the sleeve away from the compression spring.

2. A HVAC pipe laying device according to claim 1, characterized in that: The first sprocket has the same outer diameter and the same number of teeth as the second sprocket.

3. A HVAC pipe laying device according to claim 2, characterized in that: The side wall of the first fixed shaft is threaded, and two second nuts are provided between the two ends of the first arc-shaped bracket and the two first sub-gears, and the two second nuts are threadedly connected to the two first fixed shafts respectively; two third nuts are provided between the two ends of the second arc-shaped bracket and the two second sub-gears, and the two third nuts are threadedly connected to the two first fixed shafts respectively.

4. A HVAC pipe laying device according to claim 3, characterized in that: The method for using the HVAC pipe laying device includes the following steps: installing the fixing plate on the ceiling, turning on the first motor, synchronously adjusting the first sliding rod, the second sliding rod, the third sliding rod and the fourth sliding rod to a height from the ground that is convenient for installing the HVAC pipe, and then turning off the first motor; inserting the HVAC pipe into the circular channel formed by the first arc bracket and the second arc bracket, screwing the second nut and the third nut to fix the HVAC pipe; turning on the first motor again, synchronously adjusting the first sliding rod, the second sliding rod, the third sliding rod and the fourth sliding rod to a position that is convenient for connecting the HVAC pipe with other sections of the HVAC pipe; controlling the second spur gear to mesh with the first spur gear or the third spur gear, turning on the second motor, and adjusting the position or angle of the fixed HVAC pipe so that the HVAC pipe can be easily connected with other sections of the HVAC pipe.

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