Scale removing device for heating and ventilation pipeline of building

Abstract

The invention relates to a scale removing device for a heating and ventilation pipeline of a building, and belongs to the technical field of pipeline cleaning. Comprising a plurality of cleaning assemblies with driving parts sequentially connected in series and driving assemblies used for driving the cleaning assemblies. The cleaning assembly comprises a mounting shell, a driving shaft rotationally connected into the mounting shell, a rotating sleeve rotationally connected to the outer wall of the mounting shell, a transmission mechanism arranged between the driving shaft and the rotating sleeve, and a plurality of cleaning wheels evenly distributed outside the rotating sleeve. The cleaning wheel comprises a shaft seat arranged on the outer wall of the rotating sleeve and a wheel body rotationally supported on the shaft seat, friction lines are arranged on the outer wall of the wheel body, and an included angle of 30-60 degrees is formed between the rotating axis of the wheel body and the central axis of the rotating sleeve; the driving assembly comprises a driving flexible shaft connected to the driving shaft, and the driving shafts of every two adjacent cleaning assemblies are connected through a connecting flexible shaft. By means of the cleaning device, the problem that in the prior art, the heating and ventilation pipeline cleaning effect is poor is solved.

Description

Technical Field

[0001] The invention relates to a device for removing scale from building HVAC pipelines, belonging to the technical field of pipeline cleaning. Background Art

[0002] After long-term use, HVAC pipes will accumulate scale and sludge, which will lower the indoor temperature. This is more serious in areas with poor water quality. When the scale increases from 0.3mm, the heat exchange rate will drop to 79%, and a large amount of heat cannot be converted normally, causing the indoor temperature to drop, affecting the heating effect. After the HVAC pipes are scaled, the metal heat is hindered by the scale and difficult to transfer, which will cause the metal wall temperature to rise sharply. When the temperature exceeds the allowable temperature that the metal can withstand, the metal strength is significantly reduced, causing the metal to overheat and deform. In severe cases, it will cause bulging, cracks, and even pipe bursts.

[0003] Therefore, the regular cleaning and maintenance of HVAC pipes cannot be ignored. It can not only significantly improve the heating efficiency, make hot water flow smoothly, and allow warmth to be more evenly delivered to each room, but also effectively extend the service life of heating equipment, reduce the frequency of maintenance and replacement, and reduce the cost of use.

[0004] In view of the above technical problems, after searching, a Chinese patent with publication number CN111992552A discloses an anti-corrosion scale cleaning device for the inner wall of a plastic water supply pipe, and its technical key points are: it includes a connecting rod; two brackets respectively installed at both ends of the connecting rod, the brackets include a first connecting plate, a second connecting plate and a third connecting plate, and one end of the first connecting plate, the second connecting plate and the third connecting plate are respectively installed on the connecting rod; cleaning sheets are installed at the ends of the first connecting plate and the second connecting plate, and the side of the cleaning sheet facing away from the connecting rod is arc-shaped; a spiral frame is installed in the middle of the connecting rod, the spiral frame is distributed in a spiral shape around the connecting rod, and a plurality of brushes are arranged on the side of the spiral frame facing away from the connecting rod; a fan is installed at one end of the connecting rod, the fan includes a rotating motor and blades, and the rotating motor is also connected to the connecting rod through a coupling so as to drive the connecting rod and the fan to rotate through the rotating motor.

[0005] The above scheme drives the overall advancement of the device and the cleaning action of the inner wall of the pipe by setting a rotating motor to drive the spiral frame and the fan to rotate. However, since the rotating motor and the connecting rod are integrally arranged, when the entire device is placed in the pipe, the friction between the brush and the inner wall of the pipe will cause the rotating motor to rotate, and an effective cleaning effect cannot be achieved.

[0006] Therefore, a new solution needs to be proposed to solve this problem. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a device for removing scale from building HVAC pipes, which solves the problem of poor cleaning effect in the prior art.

[0008] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions: A device for removing scale from a building HVAC pipe, comprising a plurality of cleaning components connected in series with each other in a driving part, a driving component for driving the cleaning components, wherein the cleaning components are provided with a double array, and the cleaning components include a mounting shell, a driving shaft rotatably connected to the mounting shell, a rotating sleeve rotatably connected to the outer wall of the mounting shell, a transmission mechanism arranged between the driving shaft and the rotating sleeve, and a plurality of cleaning wheels uniformly distributed on the outside of the rotating sleeve; The cleaning wheel comprises an axle seat arranged on the outer wall of the rotating sleeve, and a wheel body rotatably supported on the axle seat, the outer wall of the wheel body is provided with friction patterns, and the rotation axis of the wheel body and the central axis of the rotating sleeve both have an angle of 30°-60°; The driving assembly comprises a driving flexible shaft connected to the driving shaft, and the driving shafts of two adjacent cleaning assemblies are connected via a connecting flexible shaft.

[0009] The present invention is further configured as follows: a flexible protective sleeve is provided on the outer sleeve of the driving flexible shaft, a telescopic sleeve is provided between the mounting shells of the two adjacent cleaning components, an end of the driving flexible shaft away from the cleaning component is fixedly connected to a fixed column, the fixed column is rotatably connected in the flexible protective sleeve, and a hexagonal groove is provided on the end face of the fixed column.

[0010] The present invention is further configured as follows: the transmission mechanism includes a first support ring fixedly connected to the inner wall of the mounting shell, a first transmission gear rotatably connected to the first support ring, and a driving gear arranged on the driving shaft, the mounting shell is provided with a through groove corresponding to the first transmission gear, the inner wall of the rotating sleeve is provided with an internal gear ring, one side of the first transmission gear passes through the through groove and is meshed with the internal gear ring, and the other end of the first transmission gear is meshed with the driving gear.

[0011] The present invention is further configured as follows: the transmission mechanism also includes a second support ring fixedly connected to the inner wall of the mounting shell, a second transmission gear and a third transmission gear rotatably connected to the second support ring, the mounting shell is provided with a through slot corresponding to the second transmission gear, one side of the second transmission gear passes through the through slot and engages with the inner gear ring, the third transmission gear engages with the second transmission gear, the driving gear is slidably sleeved on the driving shaft, and the driving gear and the driving shaft are connected by a spline, the driving gear is slidably engaged with the third transmission gear, and an adjusting member for controlling the sliding of the driving gear is provided in the mounting shell.

[0012] The present invention is further configured as follows: the adjusting member comprises a ring sleeve and an electromagnetic ring respectively fixedly connected to two ends of the mounting shell, two ends of the driving shaft are respectively rotatably connected to the ring sleeve and the electromagnetic ring, and a connecting spring is provided between the driving gear and the ring sleeve; One end of the connecting spring is fixedly connected to the ring sleeve, and the other end of the connecting spring is fixedly connected to the limiting ring. The end surface of the driving gear close to the connecting spring is fixedly connected to the connecting ring. The end surface of the connecting ring close to the limiting ring is provided with a T-shaped ring groove, and the limiting ring is rotatably engaged in the T-shaped ring groove. The driving gear is made of ferromagnetic material. When the electromagnetic ring is turned on, the driving gear is adsorbed on the end surface of the electromagnetic ring and meshes with the third transmission gear.

[0013] The present invention is further configured as follows: a fixing ring is fixedly connected to the outer wall of the rotating sleeve, a driving ring is rotatably connected to the outer wall of the rotating sleeve, a support plate is fixedly connected to the bottom of the shaft seat, a support member is provided at the bottom of the support plate, and the support member includes a first support rod hinged to the bottom of the support plate close to the fixing ring, a second support rod hinged to the bottom of the support plate close to the rotating ring, the other end of the first support rod is hinged to the fixing ring, the other end of the second support rod is hinged to the rotating ring, the first support rod and the second support rod are of equal length and are arranged in an eight-shaped shape.

[0014] The present invention is further configured as follows: two of the first support rods and two of the second support rods are provided in each group of the support members, the two first support rods are parallel to each other and cooperate with the support plate to form a parallelogram linkage structure, and the two second support rods are parallel to each other and cooperate with the support plate to form a parallelogram linkage structure.

[0015] The present invention is further configured as follows: a plurality of damping members are provided between the fixed ring and the rotating ring; an abutment ring groove extending circumferentially thereof is provided on the end face of the fixed ring close to the rotating ring; the damping member comprises a receiving groove provided on the end face of the rotating ring close to the fixed ring, a friction rod with one end hinged in the receiving groove, and a support spring provided between the receiving groove and the friction rod; the support spring drives the other end of the friction rod to abut against the inner wall of the abutment ring groove; when the rotating ring has a movement tendency to open the first support rod and the second support rod, the friction rod hinders relative rotation between the rotating ring and the fixed ring.

[0016] The present invention is further configured such that: the diameter of the end portion of the wheel body gradually decreases, and the wheel body is in an ellipsoidal spherical shape.

[0017] The beneficial effects of the present invention are: 1. By setting a cleaning component and a driving component, when in use, the transmission mechanism inside the cleaning component is driven by an electric tool to rotate the rotating sleeve and the cleaning wheel which are arranged on the outside of the mounting shell. When the rotating sleeve rotates, since the cleaning wheel has an angle with the central axis of the rotating sleeve, during the friction between the cleaning wheel and the cleaning wheel, a component force perpendicular to the central axis of the rotating sleeve and a component force parallel to the central axis of the rotating sleeve can be generated between the cleaning wheel and the inner wall of the pipeline. Moreover, since the transmission mechanism can change the rotation direction of the rotating sleeve by adjustment, the direction of the resultant force generated when the rotating sleeve rotates is toward the inside or outside of the pipeline, and the device as a whole can be driven to move forward or backward along the pipeline. When the rotating sleeve rotates, the resultant forces generated offset each other, and the device as a whole remains in a stopped state inside the pipeline. Friction is generated between a plurality of cleaning components and the inner wall of the pipeline to remove scale on the inner wall of the pipeline. Moreover, the user can directly control the device to perform cleaning work inside the pipeline through the electric tool outside the pipeline, which is convenient for use. 2. A transmission mechanism consisting of a first transmission gear, a second transmission gear and a third transmission gear is provided. When the rotation direction of the rotating sleeve needs to be adjusted, the corresponding electromagnetic ring is energized. Under the action of suction, the driving gear moves toward the direction close to the electromagnetic ring and meshes with the third transmission gear. Under the cooperation of the third transmission gear and the second transmission gear, the rotating sleeve rotates forward. When the electromagnetic ring is closed, under the action of the connecting spring, the driving gear abuts against the ring sleeve and meshes with the first transmission gear. The rotating sleeve is driven to rotate in the opposite direction through the first transmission gear, so that the rotation direction of the rotating sleeve can be quickly changed. Through the cooperation of several cleaning components, several rotating sleeves can rotate in the same direction or rotate in the opposite direction synchronously. 3. Through the fixed ring and the rotating ring, the support plate is respectively connected to the fixed ring and the rotating ring through the first support rod and the second support rod. When the rotating sleeve rotates, the cleaning wheel expands outward due to the influence of centrifugal force, and the first support rod and the second support rod are pulled outward by the support plate, thereby driving the rotating ring to rotate relative to the fixed ring. The cleaning wheel is pressed against the inner wall of the pipeline, and under the action of the damping member, the rotating ring is restricted from rotating, so that the pressure between the cleaning wheel and the inner wall of the pipeline is maintained, thereby improving the cleaning effect on the inner wall of the pipeline; 4. By providing two first support rods and two second support rods respectively, the support plate is more stable and less likely to shake when moving away from or approaching the rotating sleeve, thereby ensuring the stability of the cleaning wheel; 5. By setting the wheel body to an elliptical sphere, the end of the wheel body can be turned by the guide at its end during the process of moving forward or backward, and it is not easy to get stuck on the inner wall of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is an overall cross-sectional view of the present invention.

[0020] Figure 3 It is a cross-sectional view of the cleaning component part of the present invention.

[0021] Figure 4 It is a schematic diagram of the structure of the cleaning wheel after assembly in the present invention.

[0022] Figure 5 It is a schematic structural diagram of the cleaning wheel part of the present invention.

[0023] Figure 6 It is a schematic structural diagram of the fixing ring part in the present invention.

[0024] Figure 7 It is a structural schematic diagram of the rotating ring part of the present invention Figure 8 It is a cross-sectional view of the transmission mechanism part of the present invention.

[0025] Fig. 9 It is a cross-sectional view of the transmission mechanism part of the present invention.

[0026] Fig.10 yes Figure 3 A partial enlarged view of part A.

[0027] In the figure: 1. cleaning assembly; 2. driving assembly; 3. mounting shell; 4. driving shaft; 5. rotating sleeve; 6. transmission mechanism; 7. cleaning wheel; 8. connecting flexible shaft; 9. telescopic sleeve; 10. shaft seat; 11. wheel body; 12. driving flexible shaft; 13. flexible protective sleeve; 14. fixing column; 15. hexagonal groove; 16. electric tool; 17. fixing ring; 18. rotating ring; 19. supporting plate; 20. supporting member; 21. first supporting rod; 22. second supporting rod; 23. , abutment ring groove; 24, storage groove; 25, friction rod; 26, support spring; 27, first support ring; 28, first transmission gear; 29, driving gear; 30, through groove; 31, inner gear ring; 32, second support ring; 33, second transmission gear; 34, third transmission gear; 35, spline; 36, adjustment member; 37, ring sleeve; 38, electromagnetic ring; 39, connecting spring; 40, limit ring; 41, connecting ring; 42, T-ring groove; 43, damping member. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0029] like Figure 1-Figure 10As shown, a device for removing scale from building HVAC pipes includes a plurality of cleaning components 1 whose driving parts are sequentially connected in series, and a driving component 2 for driving the cleaning components 1. To ensure the stability of the movement of the device in the pipe, the cleaning components 1 are provided with a double array. Preferably, in this embodiment, the cleaning components 1 are provided with two groups.

[0030] The cleaning component 1 includes a mounting shell 3, a driving shaft 4 rotatably connected to the mounting shell 3, a rotating sleeve 5 rotatably connected to the outer wall of the mounting shell 3, a transmission mechanism 6 arranged between the driving shaft 4 and the rotating sleeve 5, and a plurality of cleaning wheels 7 evenly distributed on the outside of the rotating sleeve 5, wherein the driving component 2 is used to drive the driving shaft 4 to rotate, the driving shafts 4 of two adjacent cleaning components 1 are connected by a connecting flexible shaft 8, a telescopic sleeve 9 is provided between the mounting shells 3 of two adjacent cleaning components 1, and the telescopic sleeve 9 is sleeved on the outside of the connecting flexible shaft 8 to ensure the sealing of the connecting flexible shaft 8.

[0031] The cleaning wheel 7 includes an axle seat 10 arranged on the outer wall of the rotating sleeve 5, a wheel body 11 rotatably supported on the axle seat 10, and the outer wall of the wheel body 11 is provided with friction lines. The rotation axis of the wheel body 11 and the central axis of the rotating sleeve 5 both have an angle of 30°-60°. Preferably, the rotation axis of the wheel body 11 and the central axis of the rotating sleeve 5 have an angle of 45°, and the diameter of the end of the wheel body 11 gradually decreases, and the wheel body 11 is ellipsoidal. The wheel body 11 is set to be ellipsoidal, so that the end of the wheel body 11 can be turned by the guide of its end during the process of moving forward or backward, and it is not easy to get stuck on the inner wall of the pipeline.

[0032] The driving assembly 2 includes a driving flexible shaft 12 connected to the driving shaft 4, and a flexible protective sleeve 13 is provided on the outside of the driving flexible shaft 12. A fixed column 14 is fixedly connected to the end of the driving flexible shaft 12 away from the cleaning assembly 1, and the fixed column 14 is rotatably connected to the flexible protective sleeve 13. The end of the flexible protective sleeve 13 away from the cleaning assembly 1 is set as a fixed end, and the fixed column 14 is located at the fixed end and a hexagonal groove 15 is provided on its end face. The user can drive the driving flexible shaft 12 to rotate by inserting an electric tool 16 into the hexagonal groove 15.

[0033] In order to improve the cleaning effect on the inner wall of the pipeline, the outer wall of the rotating sleeve 5 is fixedly connected with a fixed ring 17, the outer wall of the rotating sleeve 5 is rotatably connected with a rotating ring 18, the bottom of the shaft seat 10 is fixedly connected with a support plate 19, and the bottom of the support plate 19 is provided with a support member 20, the support member 20 includes a first support rod 21 hinged to the bottom of the support plate 19 near the fixed ring 17, and a second support rod 22 hinged to the bottom of the support plate 19 near the rotating ring 18. The other end of the first support rod 21 is hinged to the fixed ring 17, and the other end of the second support rod 22 is hinged to the rotating ring 18. The first support rod 21 and the second support rod 22 are of equal length and are arranged in an eight-shaped shape. There are two first support rods 21 and two second support rods 22 in each group of support members 20, and the two first support rods 21 are parallel to each other and cooperate with the support plate 19 to form a parallelogram connecting rod structure, and the two second support rods 22 are parallel to each other and cooperate with the support plate 19 to form a parallelogram connecting rod structure. Two first support rods 21 and two second support rods 22 are provided respectively, so that the support plate 19 is more stable and less likely to shake when it moves away from or approaches the rotating sleeve 5 .

[0034] A plurality of damping members 43 are provided between the fixed ring 17 and the rotating ring 18. An abutting ring groove 23 extending circumferentially thereof is provided on the end face of the fixed ring 17 close to the rotating ring 18. The damping member 43 includes a receiving groove 24 provided on the end face of the rotating ring 18 close to the fixed ring 17, a friction rod 25 with one end hinged in the receiving groove 24, and a supporting spring 26 provided between the receiving groove 24 and the friction rod 25. The supporting spring 26 drives the other end of the friction rod 25 to abut against the inner wall of the abutting ring groove 23. When the rotating ring 18 has a movement tendency to open the first support rod 21 and the second support rod 22, the friction rod 25 prevents relative rotation between the rotating ring 18 and the fixed ring 17.

[0035] Through the fixed ring 17 and the rotating ring 18, the support plate 19 is respectively connected to the fixed ring 17 and the rotating ring 18 through the first support rod 21 and the second support rod 22. When the rotating sleeve 5 rotates, due to the influence of centrifugal force, the cleaning wheel 7 expands outward, and pulls the first support rod 21 and the second support rod 22 to extend outward through the support plate 19, thereby driving the rotating ring 18 to rotate relative to the fixed ring 17. The cleaning wheel 7 is pressed against the inner wall of the pipeline, and under the action of the damping member 43, the rotating ring 18 is restricted from rotating, thereby maintaining the pressure between the cleaning wheel 7 and the inner wall of the pipeline, and improving the cleaning effect on the inner wall of the pipeline.

[0036] The transmission mechanism 6 includes a first support ring 27 fixedly connected to the inner wall of the mounting shell 3, a first transmission gear 28 rotatably connected to the first support ring 27, and a driving gear 29 arranged on the driving shaft 4. The mounting shell 3 is provided with a through groove 30 corresponding to the first transmission gear 28, and the inner wall of the rotating sleeve 5 is provided with an internal gear ring 31. One side of the first transmission gear 28 passes through the through groove 30 and is meshed with the internal gear ring 31, and the other end of the first transmission gear 28 is meshed with the driving gear 29.

[0037] The transmission mechanism 6 also includes a second support ring 32 fixedly connected to the inner wall of the mounting shell 3, and rotatably connected to the second transmission gear 33 and the third transmission gear 34. The mounting shell 3 is provided with a through slot 30 corresponding to the second transmission gear 33. One side of the second transmission gear 33 passes through the through slot 30 and meshes with the inner gear ring 31. The third transmission gear 34 meshes with the second transmission gear 33. The driving gear 29 is slidably sleeved on the driving shaft 4, and the driving gear 29 and the driving shaft 4 are connected by a spline 35. The driving gear 29 is slidably meshed with the third transmission gear 34. An adjusting member 36 for controlling the sliding of the driving gear 29 is provided in the mounting shell 3.

[0038] The adjusting member 36 includes a ring sleeve 37 and an electromagnetic ring 38 which are respectively fixedly connected to the two ends of the mounting shell 3. The two ends of the driving shaft 4 are respectively rotatably connected to the ring sleeve 37 and the electromagnetic ring 38, and the wires of the electromagnetic ring 38 extend to the driving end along the flexible protective sleeve 13 through the telescopic sleeve 9. A connecting spring 39 is provided between the driving gear 29 and the ring sleeve 37. One end of the connecting spring 39 is fixedly connected to the ring sleeve 37, and the other end of the connecting spring 39 is fixedly connected to a limiting ring 40. A connecting ring 41 is fixedly connected to the end face of the driving gear 29 close to the connecting spring 39. A T-shaped ring groove 42 is provided on the end face of the connecting ring 41 close to the limiting ring 40. The limiting ring 40 is rotatably engaged in the T-shaped ring groove 42. The driving gear 29 is made of ferromagnetic material. When the electromagnetic ring 38 is turned on, the driving gear 29 is adsorbed on the end face of the electromagnetic ring 38 and meshes with the third transmission gear 34.

[0039] By setting a transmission mechanism 6 consisting of a first transmission gear 28, a second transmission gear 33 and a third transmission gear 34, when it is necessary to adjust the rotation direction of the rotating sleeve 5, by energizing the corresponding electromagnetic ring 38, under the action of suction, the driving gear 29 moves toward the direction close to the electromagnetic ring 38 and meshes with the third transmission gear 34. Under the cooperation of the third transmission gear 34 and the second transmission gear 33, the rotating sleeve 5 rotates forward. When the electromagnetic ring 38 is closed, under the action of the connecting spring 39, the driving gear 29 abuts against the ring sleeve 37 and meshes with the first transmission gear 28. The rotating sleeve 5 is driven to rotate in the opposite direction through the first transmission gear 28, so that the rotation direction of the rotating sleeve 5 can be quickly changed. Through the cooperation of several cleaning components 1, several rotating sleeves 5 can rotate in the same direction or rotate in the opposite direction synchronously.

[0040] The implementation principle of the present invention is: When in use, the transmission mechanism 6 inside the cleaning component 1 is driven by the electric tool 16 to rotate the rotating sleeve 5 and the cleaning wheel 7 that are rotatably sleeved on the outside of the mounting shell 3. When the rotating sleeve 5 rotates, since the cleaning wheel 7 has an angle with the central axis of the rotating sleeve 5, during the friction between the cleaning wheel 7 and the cleaning wheel 7, a component force perpendicular to the central axis of the rotating sleeve 5 and a component force parallel to the central axis of the rotating sleeve 5 can be generated between the cleaning wheel 7 and the inner wall of the pipeline. Moreover, since the transmission mechanism 6 can change the rotation direction of the rotating sleeve 5 by adjustment, the direction of the resultant force generated when the rotating sleeve 5 rotates is toward the inside or outside of the pipeline, and can drive the entire device to move forward or backward along the pipeline. When the rotating sleeve 5 rotates, the resultant forces generated offset each other, and the entire device remains stopped inside the pipeline. Friction is generated between the cleaning components 1 and the inner wall of the pipeline to remove scale on the inner wall of the pipeline. Moreover, the user can directly control the device to perform cleaning work inside the pipeline through the electric tool 16 outside the pipeline, which is convenient for use.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A device for removing scale from building HVAC pipes, characterized in that: The invention comprises a plurality of cleaning components (1) whose driving parts are sequentially connected in series, and a driving component (2) for driving the cleaning components (1), wherein the cleaning components (1) are provided with a double array, and the cleaning components (1) comprise a mounting shell (3), a driving shaft (4) rotatably connected to the mounting shell (3), a rotating sleeve (5) rotatably connected to the outer wall of the mounting shell (3), a transmission mechanism (6) arranged between the driving shaft (4) and the rotating sleeve (5), and a plurality of cleaning wheels (7) uniformly distributed on the outside of the rotating sleeve (5); The cleaning wheel (7) comprises an axle seat (10) arranged on the outer wall of the rotating sleeve (5), and a wheel body (11) rotatably supported on the axle seat (10), wherein the outer wall of the wheel body (11) is provided with friction patterns, and the rotation axis of the wheel body (11) and the central axis of the rotating sleeve (5) both have an angle of 30°-60°; The driving assembly (2) comprises a driving flexible shaft (12) connected to the driving shaft (4), and the driving shafts (4) of two adjacent cleaning assemblies (1) are connected via a connecting flexible shaft (8).

2. A device for removing scale from building HVAC pipes according to claim 1, characterized in that: The driving flexible shaft (12) is externally sleeved with a flexible protective sleeve (13), a telescopic sleeve (9) is provided between the mounting shells (3) of the two adjacent cleaning components (1), one end of the driving flexible shaft (12) away from the cleaning component (1) is fixedly connected with a fixing column (14), the fixing column (14) is rotatably connected in the flexible protective sleeve (13), and a hexagonal groove (15) is provided on the end surface of the fixing column (14).

3. A device for removing scale from building HVAC pipes according to claim 1, characterized in that: The transmission mechanism (6) comprises a first support ring (27) fixedly connected to the inner wall of the mounting shell (3), a first transmission gear (28) rotatably connected to the first support ring (27), and a driving gear (29) arranged on the driving shaft (4); the mounting shell (3) is provided with a through groove (30) corresponding to the first transmission gear (28); the inner wall of the rotating sleeve (5) is provided with an internal gear ring (31); one side of the first transmission gear (28) passes through the through groove (30) and is meshed with the internal gear ring (31); the other end of the first transmission gear (28) is meshed with the driving gear (29).

4. A device for removing scale from building HVAC pipes according to claim 3, characterized in that: The transmission mechanism (6) further comprises a second support ring (32) fixedly connected to the inner wall of the mounting shell (3), a second transmission gear (33) and a third transmission gear (34) rotatably connected to the second support ring (32); the mounting shell (3) is provided with a through slot (30) corresponding to the second transmission gear (33); one side of the second transmission gear (33) passes through the through slot (30) and meshes with the inner gear ring (31); the third transmission gear (34) meshes with the second transmission gear (33); the driving gear (29) is slidably sleeved on the driving shaft (4); the driving gear (29) and the driving shaft (4) are connected via a spline (35); the driving gear (29) is slidably meshed with the third transmission gear (34); and an adjusting member (36) for controlling the sliding of the driving gear (29) is provided in the mounting shell (3).

5. A device for removing scale from building HVAC pipes according to claim 4, characterized in that: The adjusting member (36) comprises a ring sleeve (37) and an electromagnetic ring (38) respectively fixedly connected to two ends of the mounting shell (3); two ends of the driving shaft (4) are respectively rotatably connected to the ring sleeve (37) and the electromagnetic ring (38); a connecting spring (39) is provided between the driving gear (29) and the ring sleeve (37); One end of the connecting spring (39) is fixedly connected to the ring sleeve (37), and the other end of the connecting spring (39) is fixedly connected to a limiting ring (40). The end surface of the driving gear (29) close to the connecting spring (39) is fixedly connected to a connecting ring (41). The end surface of the connecting ring (41) close to the limiting ring (40) is provided with a T-shaped ring groove (42), and the limiting ring (40) is rotatably engaged in the T-shaped ring groove (42). The driving gear (29) is made of ferromagnetic material. When the electromagnetic ring (38) is turned on, the driving gear (29) is adsorbed on the end surface of the electromagnetic ring (38) and meshes with the third transmission gear (34).

6. The device for removing scale from building HVAC pipes according to claim 1, characterized in that: The outer wall of the rotating sleeve (5) is fixedly connected to a fixing ring (17), and the outer wall of the rotating sleeve (5) is rotatably connected to a rotating ring (18). The bottom of the shaft seat (10) is fixedly connected to a support plate (19), and a support member (20) is provided at the bottom of the support plate (19). The support member (20) comprises a first support rod (21) hinged to a side of the bottom of the support plate (19) close to the fixing ring (17), and a second support rod (22) hinged to a side of the bottom of the support plate (19) close to the rotating ring (18). The other end of the first support rod (21) is hinged to the fixing ring (17), and the other end of the second support rod (22) is hinged to the rotating ring (18). The first support rod (21) and the second support rod (22) are of equal length and are arranged in an "eight" shape.

7. A device for removing scale from building HVAC pipes according to claim 6, characterized in that: Two of the first support rods (21) and the second support rods (22) are provided in each group of the support members (20); the two first support rods (21) are parallel to each other and cooperate with the support plate (19) to form a parallelogram connecting rod structure; and the two second support rods (22) are parallel to each other and cooperate with the support plate (19) to form a parallelogram connecting rod structure.

8. The device for removing scale from building HVAC pipes according to claim 6, characterized in that: A plurality of damping members (43) are provided between the fixed ring (17) and the rotating ring (18); an end surface of the fixed ring (17) close to the rotating ring (18) is provided with an abutting ring groove (23) extending circumferentially thereof; the damping member (43) comprises a receiving groove (24) provided on the end surface of the rotating ring (18) close to the fixed ring (17); a friction rod (25) one end of which is hinged in the receiving groove (24); and a supporting spring (26) provided between the receiving groove (24) and the friction rod (25); the supporting spring (26) drives the other end of the friction rod (25) to abut against the inner wall of the abutting ring groove (23); when the rotating ring (18) has a movement tendency to open the first supporting rod (21) and the second supporting rod (22), the friction rod (25) prevents the rotating ring (18) and the fixed ring (17) from rotating relative to each other.

9. The device for removing scale from building HVAC pipes according to claim 1, characterized in that: The diameter of the end of the wheel body (11) gradually decreases, and the wheel body (11) is in an ellipsoidal spherical shape.

Images