An external inspection device for a heat supply pipeline network

Abstract

The present invention relates to the technical field of heating pipe detection equipment, and specifically discloses an external inspection device for a heating pipe network for detecting heating pipes, which includes an inspection component sleeved on the outer side of the heating pipe. The inspection component includes a housing, an auxiliary crawling part, a crawling part, a detection part, a spraying part and a magnetization part. The housing is in a circular ring shape. The auxiliary crawling part is arranged at the openings at both ends of the housing. The crawling part is slidably arranged at both ends of the housing. The detection part and the spraying part are both arranged on the inner surface of the housing. The magnetization part is fixedly arranged on the crawling part. The housing includes four arc-shaped plates, and the arc-shaped plates are sequentially spliced into a ring shape. Four gaps are respectively formed between adjacent two arc-shaped plates, and a hinge seat, a telescopic member and a locking member are respectively arranged at the gaps. Through holes are symmetrically opened in the middle of the arc-shaped plates, and the crawling part is slidably connected with the through holes. The magnetization part and the sensor in this invention are used in combination to find the abnormal positions of the heating pipes in all directions, and the spraying part marks the abnormal parts, which is convenient for the staff to search and repair.

Description

Technical Field

[0001] The present invention relates to the technical field of heating pipe detection equipment, and specifically discloses an external inspection device for a heating pipe network. Background Technique

[0002] A heating pipe network is composed of multiple heating pipes that start from a boiler room, a direct-fired machine room, a heating center, etc. and lead from the heat source to the building heat inlet. During the long-term use of the heating pipes, corrosion and weld cracking will occur on the pipe surface, and most of them are pipe corrosion. Therefore, the heating pipes need to be regularly inspected to timely discover leakage hazards for timely repair to ensure the normal operation of the heating pipes.

[0003] The heating pipes need to have strict requirements for airtightness. Therefore, it is necessary to prevent heat steam leakage or other damage to the heating pipes. However, in general, heat steam leakage is not easily detected by the staff, which requires the use of detection equipment. For heating pipes laid overhead outdoors, common detection methods include inspection methods, acoustic wave methods, infrared thermometry methods, endoscopy detection methods, etc. The existing endoscopy method uses video to monitor and photograph the internal deposition, pipe damage, foreign object penetration, leakage, branch pipe hidden connection, etc. of the pipe, and can clearly see and record the internal condition of the pipe over a long distance. Then the video is transmitted to the main control machine for storage, and the staff can understand the operation condition of the pipe and the degree of damage of the pipe after analyzing the video data. However, the endoscopy method will affect the normal operation of the heating pipes, and manual operation is required during detection, which is not easy to take and place, and the abnormal positions of the pipes cannot be marked and located, which is rather troublesome. If the entire section of the heating pipe needs to be manually detected, the workload is huge and very laborious. Summary of the Invention

[0004] The purpose of the present invention is to provide an external inspection device for a heating pipe network to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An external inspection device for a heating pipe network for detecting heating pipes, including an inspection component sleeved outside the heating pipe. The inspection component includes a housing, an auxiliary crawling part, a crawling part, a detection part, a spraying part, and a magnetization part. The housing is in a circular ring shape. The auxiliary crawling part is arranged at the openings at both ends of the housing. The crawling part is slidably arranged at both ends of the housing. The detection part and the spraying part are both arranged on the inner surface of the housing. The magnetization part is fixedly arranged on the crawling part;

[0006] The housing includes four arc-shaped plates, which are sequentially spliced into a ring shape. Four gaps are respectively formed between adjacent arc-shaped plates, namely the first gap, the second gap, the third gap and the fourth gap. The first gap is opposite to the third gap, and the second gap is opposite to the fourth gap. A telescopic member is provided at the second gap and the fourth gap, and a hinge seat is provided at the first gap. The arc-shaped plates at both ends of the first gap are hinged through the hinge seat. A locking member is provided at the third gap, and the arc-shaped plates at both ends of the third gap are connected or separated through the locking member. Through holes are symmetrically formed in the middle of the arc-shaped plates, and the crawling part is slidably connected to the through holes.

[0007] Further, the auxiliary crawling part includes a connecting plate and a supporting rod. The connecting plate is fixedly connected to the side surface of the arc-shaped plate. One end of the supporting rod is hinged to the end of the connecting plate away from the arc-shaped plate. A roller is rotatably provided at the other end of the supporting rod. The supporting rod is in a V shape, and the V-shaped opening of the supporting rod faces the heating pipeline. A first spring is provided between the rod wall on the side of the supporting rod away from the roller at the bottom and the connecting plate.

[0008] Further, the crawling part includes an arc-shaped convex block, a connecting rod and a limiting plate. A guiding inclined surface is provided at the end of the arc-shaped convex block away from the detecting part. The connecting rod is slidably connected to the through hole. A crawling wheel is rotatably provided in the middle of the lower end of the arc-shaped convex block, and the surface of the crawling wheel is an arc shape that fits the heating pipeline. The connecting rod is fixedly provided in the middle of the upper end of the arc-shaped convex block. The limiting plate is provided at the other end of the connecting rod. A fourth spring is provided at the end of the connecting rod close to the arc-shaped convex block. One end of the fourth spring is fixedly connected to the arc-shaped convex block, and the other end is in contact with the inner wall of the arc-shaped plate. A fifth spring is provided at the end of the connecting rod close to the limiting plate. One end of the fifth spring is fixedly connected to the limiting plate, and the other end is in contact with the outer wall of the arc-shaped plate.

[0009] Further, the detecting part includes a fixing plate, a sensor and a camera device. The outer wall of the fixing plate is fixedly connected to the inner wall of the arc-shaped plate. The fixing plate is arc-shaped. The sensor array is provided in the middle of the inner wall of the fixing plate. The camera device is fixedly provided on one side of the inner wall of the fixing plate. There are four groups of detecting parts in total. The spraying part is provided on the side of the inner wall of the fixing plate away from the camera device of three groups of detecting parts. A control part and a first power supply block are provided on the side of the fixing plate away from the camera device of the other group of detecting parts. The first power supply block is connected to the control part through an electric wire. The control part is connected to the detecting part, the spraying part and the crawling part through electric wires.

[0010] Further, the spraying part includes a spraying box. On one side of the spraying box away from the sensor, a top plate is fixedly arranged through bolts. A piston plate is slidably arranged in the spraying box. A lead screw is rotatably arranged between the top plate and the spraying box. The lead screw penetrates through the piston plate and is in threaded connection with the piston plate. On one side of the top plate away from the spraying box, a first motor is fixedly arranged. At the end of the output shaft of the first motor, a first bevel gear is fixedly arranged. At one end of the lead screw located outside the top plate, a second bevel gear is fixedly arranged. The first bevel gear and the second bevel gear are in meshing transmission. On one side of the spraying box away from the arc-shaped plate, a plurality of nozzles are arranged.

[0011] Further, the telescopic part includes a first convex block and a second convex block. The first convex block and the second convex block are respectively arranged on the arc-shaped plates adjacent to both sides of the second gap or the fourth gap. On one side of the first convex block close to the second convex block, a plug-in block is arranged. On one side of the second convex block close to the first convex block, a first connecting column is arranged. The plug-in block is plugged into the first connecting column and is slidably connected with the first connecting column. Both the plug-in block and the first connecting column are arc-shaped. A second spring is arranged between the first convex block and the second convex block. The second spring is sleeved outside the first connecting column.

[0012] Further, the locking part includes a third convex block and a fourth convex block. The third convex block and the fourth convex block are respectively arranged on the arc-shaped plates adjacent to both sides of the third gap. On one side of the third convex block close to the fourth convex block, a second connecting column is arranged. On one side of the fourth convex block close to the third convex block, a threaded hole is opened. A threaded rod is in threaded connection in the threaded hole. One end of the threaded rod close to the third convex block is in threaded connection with the second connecting column. A third spring is arranged between the end of the threaded rod away from the third convex block and the fourth convex block.

[0013] Further, both the auxiliary crawling part and the crawling part are provided with eight. Two auxiliary crawling parts located on the same arc-shaped plate are in a group, and two crawling parts located on the same arc-shaped plate are in a group. One group of crawling parts corresponds to one group of auxiliary crawling parts. A flange is arranged at the connection of the heat supply pipeline. A plurality of reinforcing plates are arranged on the side of the flange. The rollers, the crawling wheels and the reinforcing plates are aligned along the direction parallel to the axis of the heat supply pipeline.

[0014] Further, the magnetization part is arranged on the side of the arc-shaped convex block away from the guiding inclined surface. The magnetization part includes an armature, a magnet and a pole shoe. The armature is fixedly arranged on the side of the arc-shaped convex block close to the crawling wheel. The magnets are fixedly arranged on both sides of the lower end of the armature. The pole shoes are fixedly arranged at the lower ends of the magnets.

[0015] Furthermore, a driving part is provided in the crawling part on the side of the two relatively arranged arc plates away from the spraying part, and the driving part includes a second power supply block, a reducer and a second motor. The second power supply block and the reducer are respectively arranged on both sides of the crawling wheel and are located on the surface of the side of the arc-shaped protrusion away from the connecting rod. The second motor is connected to the reducer in transmission connection, and the reducer is connected to the crawling wheel in transmission connection. The second power supply block is connected to the second motor through electric wires, and a photoelectric shaft angle encoder is connected to the side of the crawling wheel away from the reducer.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention provides an external inspection device for a heating pipe network. The magnetized part and the sensor are used together to find the leakage points of the heating pipe in all directions. A camera device is also provided to detect the overall appearance of the outside of the heating pipe, which is convenient for detecting the corrosion of the pipe. The spraying part can mark abnormal parts of the pipe in time, which is convenient for staff to find and repair.

[0018] 2. The present invention provides an external inspection device for a heating pipe network. The crawling part is capable of enabling the inspection component to automatically crawl along the heating pipe. The surface of the crawling wheel is an arc that fits the heating pipe, which increases the stability of the entire inspection component during movement. The auxiliary crawling part can play a guiding and supporting role, making the entire device more flexible. The entire device is automated through the control part, which controls the movement of the device and the detection of the pipe. The heating pipe can also be inspected while it is working, which is very convenient.

[0019] 3. The present invention provides an external inspection device for a heating pipe network. The fourth spring and the fifth spring are arranged to reset the crawling wheel when the crawling wheel crosses the flange. The first spring resets the support rod and can also make the crawling wheel and the roller close to the reinforcing plate when crossing the flange to prevent slipping and increase stability.

[0020] 4. The present invention provides an external inspection device for a heating pipe network, in which the telescopic parts are arranged to increase the gap between the arc plates, and the arc plates can be slightly expanded when crossing over the flange, so as to increase the avoidance space when the whole device climbs over obstacles such as flanges, and prevent the internal parts from colliding with the pipeline. The locking parts arranged can facilitate the disassembly and installation of the inspection components. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure when the present invention is used;

[0022] Figure 2 It is a schematic diagram of the structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the shell structure of the present invention;

[0024] Figure 4 is Figure 3 The enlarged schematic view of part A in

[0025] Figure 5 The structural schematic view of another perspective of the housing of the present invention;

[0026] Figure 6 The structural schematic view of the telescopic member of the present invention;

[0027] Figure 7 The structural schematic view of the auxiliary crawling part of the present invention;

[0028] Figure 8 The structural schematic view of the crawling part of the present invention;

[0029] Figure 9 The structural schematic view of another perspective of the crawling part of the present invention;

[0030] Figure 10 The structural schematic view of the connection between the crawling part and the driving part of the present invention;

[0031] Figure 11 The structural schematic view of the detection part of the present invention;

[0032] Figure 12 The structural schematic view of the spraying part of the present invention;

[0033] Figure 13 The half-sectional structural schematic view of the spraying part of the present invention.

[0034] In the figure: 1, heating pipeline; 11, flange; 12, reinforcing plate; 2, inspection component; 20, first power block; 21, auxiliary crawling part; 211, roller; 212, support rod; 213, first spring; 214, connecting plate; 22, housing; 221, arc plate; 2211, through hole; 2212, reinforcing rib; 223, second spring; 224, telescopic part; 2241, first convex block; 2242, plug-in block; 2243, first connecting column; 2244, second convex block; 225, locking part; 2251, third convex block; 2252, second connecting column; 2253, fourth convex block; 2254, threaded rod; 2255, third spring; 226, hinge seat; 23, crawling part; 231, arc convex block; 232, crawling wheel; 233, fourth spring; 234, connecting rod; 235, fifth spring; 236, limiting plate; 24, detection part; 241, sensor; 242, camera device; 243, fixing plate; 25, spraying part; 251, spraying box; 252, piston plate; 253, top plate; 254, first motor; 2541, first bevel gear; 255, lead screw; 2551, second bevel gear; 256, nozzle; 26, magnetization part; 261, armature; 262, magnet; 263, pole shoe; 27, driving part; 271, second power block; 272, reducer; 273, second motor; 28, photoelectric shaft angle encoder; 29, control part. Detailed implementation mode

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] In the following description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. The term "connection" only indicates the connection between devices and has no special meaning.

[0037] In addition, as long as there is no conflict between the technical fields and installation methods involved in the embodiments of the present invention described below, they can be combined with each other.

[0038] Specific embodiment: Please refer to Figures 1-13, A device for external inspection of a heat supply pipeline network, used to detect the heat supply pipeline 1, including an inspection component 2 sleeved outside the heat supply pipeline 1. The inspection component 2 includes a housing 22, an auxiliary crawling part 21, a crawling part 23, a detection part 24, a spraying part 25, and a magnetization part 26. The housing 22 is in a circular ring shape. The auxiliary crawling part 21 is arranged at the openings at both ends of the housing 22. The crawling part 23 is slidably arranged at both ends of the housing 22. The detection part 24 and the spraying part 25 are both arranged on the inner surface of the housing 22. The magnetization part 26 is fixedly arranged on the crawling part 23;

[0039] The housing 22 includes four arc-shaped plates 221. The arc-shaped plates 221 are spliced in sequence to form a ring. Four gaps are respectively formed between adjacent two arc-shaped plates 221, which are the first gap, the second gap, the third gap, and the fourth gap in sequence. The first gap is opposite to the third gap, and the second gap is opposite to the fourth gap. An expansion member 224 is arranged at the second gap and the fourth gap. A hinge seat 226 is arranged at the first gap. The arc-shaped plates 221 at both ends of the first gap are hinged through the hinge seat 226. A locking member 225 is arranged at the third gap. The arc-shaped plates 221 at both ends of the third gap are connected or separated through the locking member 225. Through holes 2211 are symmetrically opened in the middle of the arc-shaped plates 221. The crawling part 23 is slidably connected with the through holes 2211. Reinforcing ribs 2212 are arranged on both sides of the inner wall of the arc-shaped plates 221, which can increase the strength of the arc-shaped plates 221.

[0040] Furthermore, there are eight auxiliary crawling parts 21 and eight crawling parts 23. Two auxiliary crawling parts 21 located on the same arc-shaped plate 221 form a group, and two crawling parts 23 located on the same arc-shaped plate 221 form a group. One group of crawling parts 23 corresponds to one group of auxiliary crawling parts 21. A flange 11 is arranged at the connection of the heat supply pipeline 1. A plurality of reinforcing plates 12 are arranged on the side of the flange 11. The rollers 211 and the crawling wheels 232 are aligned with the reinforcing plates 12 along the direction parallel to the axis of the heat supply pipeline 1, and the rollers 211 and the crawling wheels 232 can roll on the inclined surfaces of the reinforcing plates 12.

[0041] Furthermore, the auxiliary crawling part 21 includes a connecting plate 214 and a support rod 212. The connecting plate 214 is fixedly connected with the side surface of the arc-shaped plate 221 through bolts. One end of the support rod 212 is hinged to the end of the connecting plate 214 away from the arc-shaped plate 221. A roller 211 is rotatably arranged at the other end of the support rod 212. The support rod 212 is in a V shape. The V-shaped opening of the support rod 212 faces the heat supply pipeline 1. A first spring 213 is arranged between the rod wall on the side of the support rod 212 away from the roller 211 at the bottom and the connecting plate 214. This setting can increase the crawling force of the auxiliary crawling part 21 when climbing over the flange 11. The support rod 212 undergoes a displacement in the radial direction of the heat supply pipeline 1 when climbing over the flange 11. The first spring 213 can reset the support rod 212 when passing over the reinforcing plate 12, and at the same time also make the roller 211 closely adhere to the inclined surface of the reinforcing plate 12.

[0042] Furthermore, the crawling portion 23 includes an arc-shaped protrusion 231, a connecting rod 234 and a limiting plate 236. The connecting rod 234 is slidably connected to the through hole 2211. A crawling wheel 232 is rotatably arranged in the middle of the lower end of the arc-shaped protrusion 231. The connecting rod 234 is fixedly arranged in the middle of the upper end of the arc-shaped protrusion 231. The limiting plate 236 is arranged at the other end of the connecting rod 234. A fourth spring 233 is arranged at one end of the connecting rod 234 close to the arc-shaped protrusion 231. One end of the fourth spring 233 is fixedly connected to the arc-shaped protrusion 231, and the other end contacts the inner wall of the arc plate 221. A fifth spring 235 is arranged at one end of the connecting rod 234 close to the limiting plate 236. One end of the fifth spring 235 is contacted with the limiting plate 2 36 is fixedly connected, and the other end is in contact with the outer wall of the arc plate 221. The surface of the crawling wheel 232 is an arc-shaped inwardly concave arc, which can fit the surface of the heating pipe 1 to increase the stability during crawling. The end of the arc-shaped protrusion 231 away from the detection part 24 is provided with a guiding slope. When the crawling part 23 climbs over the flange 11, under the guidance of the guiding slope, the arc-shaped protrusion 231 drives the connecting rod 234 to slide along the through hole 2211 to the outside of the shell 22, the fourth spring 233 is compressed, and the fifth spring 235 is pulled. After climbing over the flange 11, the arc-shaped protrusion 231 is reset under the action of the fourth spring 233 and the fifth spring 235, and at the same time, it can also make the crawling wheel 232 close to the reinforcing plate 12 to prevent slipping.

[0043] Furthermore, the magnetization part 26 is arranged on the side of the arc-shaped protrusion 231 away from the guide inclined surface, and the magnetization part 26 includes an armature 261, a magnet 262 and a pole shoe 263. The armature 261 is fixedly arranged on the side of the arc-shaped protrusion 231 close to the crawler wheel 232, the magnet 262 is fixedly arranged on both sides of the lower end of the armature 261, and the pole shoe 263 is fixedly arranged at the lower end of the magnet 262. The magnetization part 26 can have a magnetization effect on the heating pipe 1, and cooperate with the detection part 24 to detect the heating pipe 1.

[0044] Furthermore, a driving unit 27 is provided in the crawling unit 23 on the side away from the spraying unit 25 between the two relatively arranged arc plates 221, and the driving unit 27 includes a second power supply block 271, a reducer 272 and a second motor 273. The second power supply block 271 and the reducer 272 are respectively arranged on both sides of the crawling wheel 232 and are located on the side surface of the arc-shaped protrusion 231 away from the connecting rod 234. The second motor 273 is transmission-connected with the reducer 272, and the reducer 272 is transmission-connected with the crawling wheel 232. The second power supply block 271 and the second motor 273 are connected by electric wires, and a photoelectric shaft angle encoder 28 is connected on the side of the crawling wheel 232 away from the reducer 272. The photoelectric shaft angle encoder 28 can detect the position information of the crawling wheel 232.

[0045] Further, the detection unit 24 includes a fixing plate 243, a sensor 241 and a camera device 242. The outer wall of the fixing plate 243 is fixedly connected to the inner wall of the arc plate 221. The fixing plate 243 is arc-shaped. The sensors 241 are arranged in an array in the middle of the inner wall of the fixing plate 243. The camera device 242 is fixedly arranged on one side of the inner wall of the fixing plate 243. There are four groups of the detection unit 24 in total. The spraying unit 25 is arranged on the side of the inner wall of the fixing plate 243 of three groups of the detection unit 24 away from the camera device 242. On the side of the fixing plate 243 of the other group of the detection unit 24 away from the camera device 242, a control unit 29 and a first power supply block 20 are arranged. The first power supply block 20 is connected to the control unit 29 through an electric wire. The control unit 29 is connected to the detection unit 24, the spraying unit 25 and the crawling unit 23 through electric wires. The sensor 241 can comprehensively sense the magnetic leakage signal outside the heat supply pipeline 1, and the camera device 242 can detect the corrosion and leakage conditions outside the heat supply pipeline 1.

[0046] Further, the spraying unit 25 includes a spraying box 251. A top plate 253 is fixedly arranged on the side of the spraying box 251 away from the sensor 241 through bolts. A piston plate 252 is slidably arranged in the spraying box 251. A lead screw 255 is rotatably arranged between the top plate 253 and the spraying box 251. The lead screw 255 penetrates through the piston plate 252 and is threadedly connected to the piston plate 252. A first motor 254 is fixedly arranged on the side of the top plate 253 away from the spraying box 251. A first bevel gear 2541 is fixedly arranged at the end of the output shaft of the first motor 254. A second bevel gear 2551 is fixedly arranged at one end of the lead screw 255 outside the top plate 253. The first bevel gear 2541 is meshed with the second bevel gear 2551 for transmission. A plurality of nozzles 256 are arranged on the side of the spraying box 251 away from the arc plate 221. The spraying unit 25 can timely mark the abnormal parts of the pipeline, which is convenient for the staff to find and repair.

[0047] Further, the telescopic member 224 includes a first convex block 2241 and a second convex block 2244. The first convex block 2241 and the second convex block 2244 are respectively arranged on the adjacent arc-shaped plates 221 on both sides of the second gap or the fourth gap. On the side of the first convex block 2241 close to the second convex block 2244, a plug-in block 2242 is arranged. On the side of the second convex block 2244 close to the first convex block 2241, a first connecting column 2243 is arranged. The plug-in block 2242 is plugged into the first connecting column 2243 and is slidably connected to the first connecting column 2243. A second spring 223 is arranged between the first convex block 2241 and the second convex block 2244. The second spring 223 is sleeved outside the first connecting column 2243. The plug-in block 2242, the first connecting column 2243 and the second spring 223 are all arc-shaped to prevent jamming when the plug-in block 2242 and the first connecting column 2243 slide. The setting of the telescopic member 224 can make the entire inspection component 2 slightly expand the arc-shaped plate 221 when crossing the flange 11, increasing the avoidance space and preventing the internal components from colliding with the heating pipeline 1.

[0048] Further, the locking member 225 includes a third convex block 2251 and a fourth convex block 2253. The third convex block 2251 and the fourth convex block 2253 are respectively arranged on the adjacent arc-shaped plates 221 on both sides of the third gap. On the side of the third convex block 2251 close to the fourth convex block 2253, a second connecting column 2252 is arranged. On the side of the fourth convex block 2253 close to the third convex block 2251, a threaded hole is opened. A threaded rod 2254 is connected in the threaded hole by thread. One end of the threaded rod 2254 close to the third convex block 2251 is threadedly connected to the second connecting column 2252. A third spring 2255 is arranged between the end of the threaded rod 2254 far from the third convex block 2251 and the fourth convex block 2253. The locking member 225 makes the entire inspection component 2 adjustable and also facilitates the installation and disassembly of the inspection component 2.

[0049] When a heat supply pipeline external inspection device is in use, rotate the threaded rod 2254 to disengage the threaded rod 2254 from the second connecting column 2252, rotate the arc-shaped plate 221 to open the arc-shaped plate 221, install the detection part 24, the crawling part 23 and the auxiliary crawling part 21 on each arc-shaped plate 221, install the spraying part 25 on the inner wall of the fixing plate 243 of the three groups of detection parts 24, install the control part 29 and the first power supply block 20 on the inner wall of the fixing plate 243 of another group of detection parts 24, install the magnetization part 26 on each group of crawling parts 23, install the driving part 27 on the crawling part 23 on the side of the opposite arc-shaped plate 221 away from the spraying part 25. After all components are installed, buckle the whole device on the outside of the heat supply pipeline 1, and rotate the threaded rod 2254 in the reverse direction to connect the threaded rod 2254 with the second connecting column 2252, then the inspection component 2 can be installed on the heat supply pipeline 1. When detecting the pipeline, start the second motor 273. The power of the second motor 273 is transmitted to the crawling wheel 232 after being decelerated by the reducer 272. The crawling wheel 232 rotates, driving the whole inspection component 2 to move along the heat supply pipeline 1. The magnetization part 26 magnetizes the heat supply pipeline 1. At the same time, start the sensor 241 and the camera device 242, which can comprehensively sense the magnetic leakage signal outside the heat supply pipeline 1 and detect the corrosion and leakage conditions outside the heat supply pipeline 1. If any abnormal situation is found, the sensor 241 or the camera device 242 will transmit the signal to the control part 29. After receiving the signal, the control part 29 starts the first motor 254. The output shaft of the first motor 254 rotates, driving the first bevel gear 2541 to rotate. The second bevel gear 2551 meshing with the first bevel gear 2541 rotates, driving the lead screw 255 to rotate. The piston plate 252 threadedly connected with the lead screw 255 rotates, and the piston plate 252 moves in the spraying tank 251, squeezing the spraying liquid. The spraying liquid flows out from the nozzle 256 and sprays onto the outer wall of the heat supply pipeline 1 to mark the abnormal part of the heat supply pipeline 1, which is convenient for the staff to find and repair. The photoelectric shaft angle encoder 28 will detect the displacement and position information of the crawling part 23.

[0050] When crossing the flange 11, the auxiliary crawling part 21 and the crawling part 23 cross in sequence. The roller 211 on the side close to the flange 11 rolls along the inclined surface of the reinforcing plate 12. At this time, the support rod 212 rotates outward towards the outside of the heating pipeline 1, and the first spring 213 is compressed. When the roller 211 moves to the reinforcing plate 12, the support rod 212 resets under the action of the first spring 213 and rotates inward towards the inside of the heating pipeline 1, making the roller 211 roll closely along the reinforcing plate 12. When the crawling wheel 232 moves to the flange 11, the crawling wheel 232 rolls along the inclined surface of the reinforcing plate 12, and the connecting rod 234 slides away from the heating pipeline 1 along the through hole 2211. The fourth spring 233 is compressed, and the fifth spring 235 is stretched. At the same time, the plugging block 2242 and the first connecting column 2243 move away from each other, and the second spring 223 is stretched, and the entire inspection component 2 expands slightly. When the crawling wheel 232 on the side close to the flange 11 moves to the reinforcing plate 12, the connecting rod 234 gradually resets under the action of the fourth spring 233 and the fifth spring 235 and moves towards the direction close to the heating pipeline 1. At the same time, the crawling wheel 232 is made to roll closely along the reinforcing plate 12. The first convex block 2241 and the second convex block 2244 approach each other again under the action of the second spring 223, and the entire inspection component 2 resets. At this time, the auxiliary crawling part 21 and the crawling part 23 on one side complete the crossing. When the crawling wheel 232 on the other side crosses the flange 11, the actions of each part are the same as above. When encountering an obstacle that cannot be crossed, the locking part 225 can be opened, the entire inspection component 2 can be removed, moved over the obstacle, and then sleeved outside the heating pipeline 1 and the locking part 225 is locked. Repeating the above process can achieve the purpose. The magnetization part 26 and the sensor 241 provided in the device are used in combination, which can find the leakage points of the heating pipeline 1 in all directions. And a camera device 242 is provided, which can detect the overall appearance of the outside of the heating pipeline 1, facilitating the detection of the corrosion condition of the pipeline. The spraying part 25 can mark the abnormal parts of the pipeline in time, facilitating the staff to find and repair. The provided crawling part 23 enables the inspection component 2 to automatically crawl along the heating pipeline 1. The surface of the crawling wheel 232 is an arc that fits the heating pipeline 1, which increases the stability of the entire inspection component 2 during movement. The auxiliary crawling part 21 can play a guiding and supporting role, making the entire device have better flexibility. The entire device is automated through the control part 29, controlling the movement of the device and the detection of the pipeline, and can also inspect the heating pipeline 1 when it is working, which is very convenient.

[0051] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An external inspection device for a heat supply pipeline network, used for detecting a heat supply pipeline (1), characterized in that: It includes an inspection component (2) sleeved outside the heating pipeline (1). The inspection component (2) includes a housing (22), an auxiliary crawling part (21), a crawling part (23), a detection part (24), a spraying part (25) and a magnetization part (26). The housing (22) is annular. The auxiliary crawling part (21) is arranged at the openings at both ends of the housing (22). The crawling part (23) is slidably arranged at both ends of the housing (22). The detection part (24) and the spraying part (25) are both arranged on the inner surface of the housing (22). The magnetization part (26) is fixedly arranged on the crawling part (23). The housing (22) includes four arc-shaped plates (221). The arc-shaped plates (221) are sequentially spliced into a ring. Four gaps are respectively formed between adjacent two arc-shaped plates (221), namely the first gap, the second gap, the third gap and the fourth gap. The first gap is opposite to the third gap, and the second gap is opposite to the fourth gap. An expansion member (224) is arranged at the second gap and the fourth gap. A hinge seat (226) is arranged at the first gap. The arc-shaped plates (221) at both ends of the first gap are hinged through the hinge seat (226). A locking member (225) is arranged at the third gap. The arc-shaped plates (221) at both ends of the third gap are connected or separated through the locking member (225). Through holes (2211) are symmetrically formed in the middle of the arc-shaped plates (221). The crawling part (23) is slidably connected with the through holes (2211).

2. The external inspection device for a heat supply pipe network according to claim 1, wherein: The auxiliary crawling part (21) includes a connecting plate (214) and a support rod (212). The connecting plate (214) is fixedly connected with the side surface of the arc-shaped plate (221). One end of the support rod (212) is hinged to the end of the connecting plate (214) far away from the arc-shaped plate (221). A roller (211) is rotatably arranged at the other end of the support rod (212). The support rod (212) is V-shaped. The V-shaped opening of the support rod (212) faces the heating pipeline (1). A first spring (213) is arranged between the rod wall on the side of the support rod (212) far away from the roller (211) at the bottom and the connecting plate (214).

3. The external inspection device for a heat supply pipeline network according to claim 2, characterized in that: The crawling part (23) includes an arc-shaped bump (231), a connecting rod (234), and a limiting plate (236). A guiding inclined surface is provided at one end of the arc-shaped bump (231) away from the detection part (24). The connecting rod (234) is slidably connected to the through hole (2211). A crawling wheel (232) is rotatably arranged in the middle of the lower end of the arc-shaped bump (231). The surface of the crawling wheel (232) is an arc conforming to the heating pipeline (1). The connecting rod (234) is fixedly arranged in the middle of the upper end of the arc-shaped bump (231). The limiting plate (236) is arranged at the other end of the connecting rod (234). A fourth spring (233) is arranged at one end of the connecting rod (234) close to the arc-shaped bump (231). One end of the fourth spring (233) is fixedly connected to the arc-shaped bump (231), and the other end contacts the inner wall of the arc-shaped plate (221). A fifth spring (235) is arranged at one end of the connecting rod (234) close to the limiting plate (236). One end of the fifth spring (235) is fixedly connected to the limiting plate (236), and the other end contacts the outer wall of the arc-shaped plate (221).

4. The external inspection device for a heat supply pipeline network according to claim 1, characterized in that: The detection part (24) includes a fixing plate (243), a sensor (241), and a camera device (242). The outer wall of the fixing plate (243) is fixedly connected to the inner wall of the arc-shaped plate (221). The fixing plate (243) is arc-shaped. The sensors (241) are arranged in an array in the middle of the inner wall of the fixing plate (243). The camera device (242) is fixedly arranged on one side of the inner wall of the fixing plate (243). There are four groups of the detection parts (24) in total. The spraying part (25) is arranged on the side of the inner wall of the fixing plate (243) of three groups of the detection parts (24) away from the camera device (242). A control part (29) and a first power supply block (20) are arranged on the side of the fixing plate (243) of the other group of the detection parts (24) away from the camera device (242). The first power supply block (20) is connected to the control part (29) through an electric wire. The control part (29) is connected to the detection part (24), the spraying part (25), and the crawling part (23) through electric wires.

5. The external inspection device for a heat supply pipeline network according to claim 4, wherein: The spraying part (25) includes a spraying box (251). On one side of the spraying box (251) away from the sensor (241), a top plate (253) is fixedly arranged by bolts. A piston plate (252) is slidably arranged in the spraying box (251). A lead screw (255) is rotatably arranged between the top plate (253) and the spraying box (251). The lead screw (255) penetrates through the piston plate (252) and is threadedly connected to the piston plate (252). On the side of the top plate (253) away from the spraying box (251), a first motor (254) is fixedly arranged. At the end of the output shaft of the first motor (254), a first bevel gear (2541) is fixedly arranged. At one end of the lead screw (255) located outside the top plate (253), a second bevel gear (2551) is fixedly arranged. The first bevel gear (2541) is in meshing transmission with the second bevel gear (2551). On the side of the spraying box (251) away from the arc plate (221), a plurality of nozzles (256) are arranged.

6. The external inspection device for a heat supply pipeline network according to claim 1, characterized in that: The telescopic member (224) includes a first convex block (2241) and a second convex block (2244). The first convex block (2241) and the second convex block (2244) are respectively arranged on the arc plates (221) adjacent to both sides of the second gap or the fourth gap. On the side of the first convex block (2241) close to the second convex block (2244), a plug-in block (2242) is arranged. On the side of the second convex block (2244) close to the first convex block (2241), a first connecting column (2243) is arranged. The plug-in block (2242) is plugged into the first connecting column (2243) and is slidably connected to the first connecting column (2243). Both the plug-in block (2242) and the first connecting column (2243) are arc-shaped. A second spring (223) is arranged between the first convex block (2241) and the second convex block (2244). The second spring (223) is sleeved outside the first connecting column (2243).

7. The external inspection device for a heat supply pipeline network according to claim 6, characterized in that: The locking member (225) includes a third convex block (2251) and a fourth convex block (2253). The third convex block (2251) and the fourth convex block (2253) are respectively arranged on the arc plates (221) adjacent to both sides of the third gap. On the side of the third convex block (2251) close to the fourth convex block (2253), a second connecting column (2252) is arranged. On the side of the fourth convex block (2253) close to the third convex block (2251), a threaded hole is opened. A threaded rod (2254) is threadedly connected in the threaded hole. One end of the threaded rod (2254) close to the third convex block (2251) is threadedly connected to the second connecting column (2252). A third spring (2255) is arranged between the end of the threaded rod (2254) away from the third convex block (2251) and the fourth convex block (2253).

8. The external inspection device for a heat supply pipeline network according to claim 3, characterized in that: The auxiliary crawling parts (21) and the crawling parts (23) are each provided with eight, two auxiliary crawling parts (21) located on the same arc-shaped plate (221) form a group, and two crawling parts (23) located on the same arc-shaped plate (221) form a group, and one group of crawling parts (23) corresponds to one group of auxiliary crawling parts (21). A flange (11) is provided at the connection of the heating pipe (1), and a plurality of reinforcing plates (12) are provided on the side of the flange (11). The roller (211), the crawling wheel (232) and the reinforcing plate (12) are aligned in a direction parallel to the axis of the heating pipe (1).

9. The external inspection device for a heat supply pipe network according to claim 8, wherein: The magnetized portion (26) is arranged on a side of the arc-shaped protrusion (231) away from the guide inclined surface, and the magnetized portion (26) comprises an armature (261), a magnet (262) and a pole shoe (263); the armature (261) is fixedly arranged on a side of the arc-shaped protrusion (231) close to the crawler wheel (232), the magnet (262) is fixedly arranged on both sides of the lower end of the armature (261), and the pole shoe (263) is fixedly arranged on the lower end of the magnet (262).

10. The external inspection device for a heat supply pipeline network according to claim 9, characterized in that: A driving part (27) is provided in the crawling part (23) on the side of the two arc-shaped plates (221) arranged opposite to each other and away from the spraying part (25), and the driving part (27) comprises a second power supply block (271), a reducer (272) and a second motor (273); the second power supply block (271) and the reducer (272) are respectively arranged on both sides of the crawling wheel (232) and located on the surface of the side of the arc-shaped protrusion (231) away from the connecting rod (234); the second motor (273) is transmission-connected with the reducer (272); the reducer (272) is transmission-connected with the crawling wheel (232); the second power supply block (271) and the second motor (273) are connected by electric wires; and a photoelectric shaft angle encoder (28) is connected on the side of the crawling wheel (232) away from the reducer (272).

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