CN217276679U

CN217276679U - Vacuum system leakage detection device using thermal imaging technology

Info

Publication number: CN217276679U
Application number: CN202220989344.XU
Authority: CN
Inventors: 董昊炯; 王飞; 居国腾; 孙海龙; 李丰均
Original assignee: Zhejiang Zheneng Shaoxing Binhai Thermal Power Co ltd
Current assignee: Zhejiang Zheneng Shaoxing Binhai Thermal Power Co ltd
Priority date: 2022-04-25
Filing date: 2022-04-25
Publication date: 2022-08-23
Anticipated expiration: 2032-04-25

Abstract

The application relates to a vacuum system leakage detection device utilizing a thermal imaging technology, which comprises a circulating track arranged on the outer peripheral side of a vacuum system and a movable frame movably arranged on the circulating track, wherein the movable frame is provided with a travelling mechanism for driving the movable frame to move; the top of the moving frame is provided with a thermal imaging camera. When the thermal imaging camera shoots and detects, the moving vehicle frame can drive the thermal imaging camera to move along the circulating track, so that the vacuum system is detected in a full range, and the detection cost of the vacuum system is reduced while the detection range of the thermal imaging camera is enlarged.

Description

Vacuum system leakage detection device using thermal imaging technology

Technical Field

The application relates to the technical field of vacuum system leakage detection, in particular to a vacuum system leakage detection device utilizing a thermal imaging technology.

Background

A thermal imaging detection technique, which is a technique for receiving infrared rays emitted from an object by a thermal imaging camera; the thermal imager in the thermal imaging camera can detect the temperature and convert the temperature into a real-time video image to be displayed, and the temperature distribution of the surface of the measured object is displayed through a picture with color.

In the power generation of a thermal system of a large-scale thermal power station or a nuclear power conventional island, a vacuum area is formed in the thermal system; the formation of a vacuum system requires high sealing performance of the system, and it is necessary to constantly alert the outer wall of the system to the occurrence of cracks and leaks. Because the internal temperature of the vacuum system is relatively stable, when the vacuum system leaks, the abnormal point of the temperature difference can be displayed through the image shot by the thermal imaging camera, so that people can quickly find the leaking position of the vacuum system and maintain and process the leaking position.

When the existing thermal imaging camera is used, if the volume of the vacuum system is large and the thermal imaging camera is limited by the shooting range of the thermal imaging camera and is difficult to completely shoot the vacuum system, the detection range of the vacuum system is generally increased by additionally installing the thermal imaging camera. However, the thermal imaging camera is expensive, and the way of installing the thermal imaging camera greatly increases the inspection cost of the vacuum system, resulting in additional economic burden.

SUMMERY OF THE UTILITY MODEL

In order to reduce the detection cost of a vacuum system while increasing the detection range of a thermal imaging camera, the application provides a vacuum system leakage detection device utilizing a thermal imaging technology.

The application provides an utilize vacuum system leakage detection device of thermal imaging technique adopts following technical scheme:

a vacuum system leakage detection device utilizing thermal imaging technology comprises a circulation track arranged on the outer periphery side of a vacuum system and a movable frame movably arranged on the circulation track, wherein the movable frame is provided with a travelling mechanism for driving the movable frame to move; and a thermal imaging camera is mounted at the top of the moving frame.

Through adopting foretell technical scheme, the thermal imaging camera of this application passes through moving vehicle frame movable mounting in circulation track, when the thermal imaging camera shoots vacuum system and detects whether vacuum system leaks, can make moving vehicle frame move along circulation track through the action of control running gear to make thermal imaging camera pass through vacuum system's week side, and then play the detection of full range to vacuum system, can reduce vacuum system's detection cost when increasing thermal imaging camera detection range, reduce the economic burden of enterprise.

Optionally, the movable frame comprises two mounting plates and a plurality of connecting columns fixed between the two mounting plates; the travelling mechanism comprises a plurality of groups of pulley assemblies and a driving assembly for driving the pulley assemblies to rotate together, the number of the pulley assemblies is matched with the number of the connecting columns, each pulley assembly comprises a rotating sleeve rotatably mounted on the connecting column and two friction wheels respectively mounted at the upper end and the lower end of the rotating sleeve, and the friction wheels abut against the inner wall of the circulating track; the friction wheel and the rotating sleeve are arranged in a circumferential linkage manner.

Through adopting foretell technical scheme, rotate the cover and rotate and install behind the spliced pole, the friction pulley that rotates the cover both ends can support and lean on in the orbital inner wall of circulation, and control drive assembly action this moment can drive each friction pulley and rotate to order about whole moving vehicle frame and remove along the orbital extending direction of circulation, and then make moving vehicle frame drive thermal imaging camera through vacuum system all around.

Optionally, the driving assembly includes a first belt pulley, a second belt pulley, a rotating motor, a worm wheel and a worm; the mounting plate is rotatably provided with two rotating rods, the number of the first belt pulleys is two, and the two first belt pulleys are respectively and coaxially connected with the two rotating rods; the number of the second belt pulleys is two, the two second belt pulleys are respectively sleeved on the two rotating sleeves correspondingly, and each second belt pulley is fixedly connected with the rotating sleeve; the adjacent first belt pulley and the second belt pulley are in transmission connection through a tension belt;

the worm is arranged between the two worm wheels in a rotating manner, and the worm is simultaneously in meshing transmission with the two worm wheels; the rotating motor is fixed on the mounting plate, and an output shaft of the rotating motor is connected with the worm.

By adopting the technical scheme, when the rotating motor runs, the output shaft of the rotating motor can drive the worm to rotate, so that the two worm wheels meshed with the worm rotate in opposite directions; the power of rotating the motor is via worm wheel, first belt pulley, tensioning band, second belt pulley, rotation cover and finally transmit to two friction pulley in proper order for two friction pulley also can rotate along opposite direction, and then make two friction pulley that paste in the circulation track inner wall drive moving vehicle frame forward together. In addition, because the two friction wheels are used for providing power for the travelling of the moving frame, the moving frame can be kept in good stability during travelling, and the possibility of poor imaging quality caused by the shake of the thermal imaging camera in the moving process of the moving frame is reduced.

Optionally, the circulating track includes a bottom plate fixedly disposed and side plates mounted on two sides of the bottom plate in the width direction, an integrally formed baffle is disposed on the opposite side of the two side plates, and the baffle is located on one side of the side plate away from the bottom plate.

By adopting the technical scheme, a channel for the moving vehicle frame to move can be formed between the bottom plate and the side plates on the two sides, the moving vehicle frame can be stably positioned in the channel due to the arrangement of the baffle plates, the situation that the moving vehicle frame accidentally jumps out of the circulating track when moving is reduced, and the possibility that the thermal imaging camera on the moving vehicle frame is damaged and damaged is reduced.

Optionally, a damping rubber pad is bonded to the bottom of the baffle and abuts against a friction wheel at the upper end of the rotating sleeve.

Through adopting foretell technical scheme, when the in-process that removes the frame along the circulation track removal takes place to beat, the vibrations that remove the frame can be weakened in the setting of shock attenuation cushion, is favorable to improving thermal imaging camera's imaging quality and detection precision.

Optionally, a plurality of ball grooves are formed in the bottom of the mounting plate below the two mounting plates, and balls capable of rolling freely are mounted in the ball grooves.

Through adopting foretell technical scheme, the setting of ball can weaken the frictional resistance between moving vehicle frame bottom and the circulation track, is convenient for move the moving vehicle frame and removes in the circulation track. In addition, the situation that foreign matters enter the inside of the circulating track inevitably exists when the circulating track is used, the foreign matters in the inside of the circulating track can be avoided due to the arrangement of the balls, and the possibility that the moving vehicle frame is blocked in the inside of the circulating track is reduced.

Optionally, a lifting platform is installed between the thermal imaging camera and the moving frame, the lifting platform includes a linear module vertically fixed on the upper surface of the moving frame and a fixing seat installed at the moving end of the linear module, and the thermal imaging camera is fixed on the fixing seat.

Through adopting foretell technical scheme, when the locomotive frame drove the thermal imaging camera along circulation track removal, lift platform can also drive the thermal imaging camera and go up and down in vertical direction to further increase the detection range of thermal imaging camera.

Optionally, a refrigeration mechanism is arranged at the bottom of the fixing seat, the refrigeration mechanism includes a refrigeration box and a blowing pipe connected to the refrigeration box, an air tap is fixed at one end of the blowing pipe far away from the refrigeration box, and the air tap is just opposite to the outer side wall of the vacuum system.

Through adopting foretell technical scheme, at the thermal imaging camera removal in-process, refrigerating mechanism can follow the thermal imaging camera and remove together, and the blowing pipe of connecting in the refrigeration case can constantly blow cold wind to vacuum system's lateral wall, if vacuum system appears leaking, the temperature decline that the cold wind can leak the position with higher speed, and then can make the difference of the temperature image that the thermal imaging camera was shot more obvious, improves the detection precision when detecting the leakage to vacuum system.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by arranging the circulating track and the moving frame, the moving frame can drive the thermal imaging camera to move along the circulating track, so that the full-range detection is performed on the vacuum system, the detection range of the thermal imaging camera is enlarged, and the detection cost of the vacuum system is reduced;

2. the driving assembly drives the two friction wheels to rotate reversely, and the two friction wheels provide power for the travelling of the moving frame, so that the moving frame can keep good stability during travelling, and the possibility of poor imaging quality caused by the shaking of the thermal imaging camera in the moving process of the moving frame is reduced;

3. through setting up free rotation's ball, can weaken the frictional force between moving vehicle frame bottom and the circulation track, can dodge the inside foreign matter of circulation track simultaneously, be favorable to moving vehicle frame's smooth removal in the circulation track.

Drawings

FIG. 1 is a schematic view of the overall structure of the present embodiment;

FIG. 2 is an enlarged view at A in FIG. 1;

fig. 3 is a sectional view of the circulating rail in the embodiment, which mainly shows the positional relationship between the moving carriage and the circulating rail;

FIG. 4 is a schematic structural view of the traveling carriage in this embodiment;

fig. 5 is an enlarged view at B in fig. 4.

Description of reference numerals: 1. circulating the track; 11. a base plate; 12. a side plate; 13. a baffle plate; 14. a shock-absorbing rubber pad; 2. moving the frame; 21. mounting a plate; 22. connecting columns; 23. a ball bearing; 24. rotating the rod; 3. a thermal imaging camera; 4. a traveling mechanism; 41. a sheave assembly; 411. rotating the sleeve; 412. a friction wheel; 42. a drive assembly; 421. a first pulley; 422. a second pulley; 423. tensioning the belt; 424. rotating the motor; 425. a worm gear; 426. a worm; 5. a lifting platform; 51. a linear module; 52. a fixed seat; 6. a refrigeration mechanism; 61. a refrigeration case; 62. a blowpipe; 63. an air tap.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a vacuum system leakage detection device utilizing a thermal imaging technology, which is suitable for leakage detection of a vacuum area in a thermodynamic system, and is particularly suitable for leakage detection of a vacuum area of a large thermal power generation or nuclear power conventional island.

Referring to fig. 1 and 2, a vacuum system leakage detecting apparatus using a thermal imaging technique includes a circulation rail 1, a moving carriage 2, and a thermal imaging camera 3; the circulating orbit 1 is fixed on the ground at the outer periphery of the vacuum system, and the circulating orbit 1 surrounds and is arranged at the outer periphery of the vacuum system; the circulation rail 1 transitions smoothly at the corners of the vacuum system. The moving vehicle frame 2 is movably arranged on the circulating track 1, a walking mechanism 4 used for driving the moving vehicle frame 2 to move is arranged inside the moving vehicle frame 2, and the thermal imaging camera 3 is arranged on the upper surface of the moving vehicle frame 2.

Referring to fig. 3, the circulating rail 1 of the present embodiment includes a bottom plate 11 fixed to the ground and two side plates 12 fixed to both sides of the bottom plate 11 in the width direction, a passage is formed between the bottom plate 11 and the two side plates 12, and the moving frame 2 is mounted on the circulating rail 1 and can move in the passage; the opposite sides of the two side plates 12 are respectively provided with a baffle 13, and the baffles 13 are positioned on one sides of the side edges far away from the bottom plate 11 and used for limiting the moving vehicle frame 2 to be separated from the circulating track 1; the bottom plate 11, the side plate 12 and the baffle 13 are integrally formed.

Referring to fig. 2 and 3, the moving frame 2 includes two mounting plates 21 and a plurality of connecting columns 22 fixed between the two mounting plates 21, wherein the mounting plates 21 are rectangular plates, and the width of the mounting plates 21 is not greater than the minimum distance between the two baffle plates 13; the number of the connecting columns 22 is four, and the four connecting columns 22 are respectively located at four corner positions of the mounting plate 21. The bottom of the mounting plate 21 positioned below the two mounting plates 21 is provided with a plurality of ball grooves, and adjacent ball grooves are arranged at intervals; a ball 23 which rolls freely is embedded in each ball groove, and the inner diameter of the opening of each ball groove is smaller than that of the ball groove, so that the ball 23 is limited to be separated from the ball groove; the provision of the balls 23 can improve the smoothness of movement of the moving body 2 in the tunnel.

Referring to fig. 3 and 4, the traveling mechanism 4 includes a driving assembly 42 and a plurality of sets of pulley assemblies 41; the number of the pulley assemblies 41 is equal to the number of the connecting columns 22, and each pulley assembly 41 is installed on the connecting column 22. The pulley assembly 41 comprises a rotating sleeve 411 and a friction wheel 412, and the rotating sleeve 411 is sleeved on the outer peripheral side of the corresponding connecting column 22 and is rotatably connected with the connecting column 22; the number of the friction wheels 412 is two, the two friction wheels 412 are respectively installed at two ends of the axis direction of the rotating sleeve 411, and the friction wheels 412 and the rotating sleeve 411 are arranged in a circumferential linkage manner, so that the rotating sleeve 411 can drive the friction wheels 412 to rotate when rotating.

Referring to fig. 3 and 4, in the present embodiment, each friction wheel 412 can abut against the side plate 12 of the circulating track 1, so that the friction wheel 412 can drive the moving frame 2 to move by friction when rotating. In addition, a damping rubber pad 14 is bonded to the bottom of the baffle 13, and the damping rubber pad 14 of the embodiment is made of an EVA foam material; the lower surface of the cushion rubber 14 abuts against the rotating wheel at the upper end of the rotating sleeve 411, so that the vibration of the moving frame 2 can be weakened when the moving frame 2 moves, and the improvement of the imaging quality and the detection precision of the thermal imaging camera 3 is facilitated.

Referring to fig. 3 and 4, in the present embodiment, two pulley assemblies 41 located at the front end of the moving frame 2 in the moving direction are provided as the driving wheel assemblies, and two pulley assemblies 41 located at the rear end of the moving frame 2 in the moving direction are provided as the follower wheel assemblies. The driving assembly 42 includes two first belt pulleys 421, two second belt pulleys 422, a rotating motor 424, a worm wheel 425 and a worm 426, wherein the two second belt pulleys 422 are respectively sleeved with the rotating sleeves 411 of the two sets of driving wheel assemblies, and the second belt pulleys 422 are fixed on the outer peripheral sides of the adjacent rotating sleeves 411. The top surface of the mounting plate 21 positioned below is rotatably provided with two rotating rods 24, the number of the first belt pulleys 421 is two, and the two first belt pulleys 421 are respectively and coaxially connected to the two rotating rods 24; a tension belt 423 is provided between each pulley and the adjacent second pulley 422, and the friction wheel 412 can be rotated along with the rotating rod 24 by the tension belt 423.

Referring to fig. 4 and 5, two worm gears 425 are provided, and the two worm gears 425 are coaxially connected to the two rotation levers 24, respectively; the rotating motor 424 is fixed on the top surface of the lower mounting plate 21, and the output shaft of the rotating motor 424 is horizontally arranged and connected to the worm 426; the worm 426 is located between the two worm gears 425, and the worm 426 is in mesh transmission with both worm gears 425 at the same time. When the rotating motor 424 operates, the rotating motor 424 can drive the two worm wheels 425 to rotate in opposite directions, and finally the friction wheels 412 respectively arranged on the two driving wheel assemblies rotate in opposite directions, so as to drive the moving frame 2 to move forward.

Referring to fig. 3, a lifting platform 5 is arranged between the thermal imaging camera 3 and the moving frame 2, the lifting platform 5 comprises a linear module 51 and a fixed seat 52, wherein the linear module 51 is vertically fixed on the top surface of the upper mounting plate 21, so that the moving end of the linear module 51 can move up and down along the vertical direction; the fixing base 52 is fixed to the moving end of the linear module 51, and the thermal imaging camera 3 is mounted on the upper surface of the fixing base 52.

Referring to fig. 3, the bottom of the fixed seat 52 is provided with a refrigeration mechanism 6, and the refrigeration mechanism 6 includes a refrigeration box 61 fixed on one side of the fixed seat 52 away from the vacuum system and a blowing pipe 62 connected to the refrigeration box 61; the blowpipe 62 is fixed to the lower surface of the fixing base 52 by a clamp, and an air nozzle 63 is installed at an end of the blowpipe 62 away from the refrigeration box 61, the air nozzle 63 facing the outer side wall of the vacuum system. The blowpipe 62 of this embodiment can follow the refrigeration case 61 and move and continuously blow cold wind to the lateral wall of vacuum system, can change when leaking the formation into the thermal imaging camera 3 shooting detection more easily, further improves the detection precision when carrying out the leakage detection to the vacuum system.

The implementation principle of the vacuum system leakage detection device using the thermal imaging technology in the embodiment of the application is as follows:

when the thermal imaging camera 3 shoots and detects whether the vacuum system leaks, the rotating wheels of the two sets of driving wheel assemblies can be rotated reversely by controlling the operation of the rotating motor 424, so that the moving frame 2 is driven to move forward along the circulating track 1. The thermal imaging camera 3 passes through the periphery of the vacuum system, so that the vacuum system can be detected in a full range, the detection range of the thermal imaging camera 3 is enlarged, the detection cost of the vacuum system is reduced, and the economic burden of an enterprise is reduced.

The above is a preferred embodiment of the present application, and the scope of protection of the present application is not limited by the above, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A vacuum system leakage detection device using thermal imaging technology is characterized in that: the device comprises a circulating track (1) arranged on the outer peripheral side of a vacuum system and a moving vehicle frame (2) movably arranged on the circulating track (1), wherein the moving vehicle frame (2) is provided with a travelling mechanism (4) for driving the moving vehicle frame (2) to move; and a thermal imaging camera (3) is mounted at the top of the moving frame (2).

2. The vacuum system leak detection apparatus using a thermal imaging technique according to claim 1, characterized in that: the movable frame (2) comprises two mounting plates (21) and a plurality of connecting columns (22) fixed between the two mounting plates (21); the travelling mechanism (4) comprises a plurality of groups of pulley assemblies (41) and a driving assembly (42) for driving the pulley assemblies (41) to rotate together, the number of the pulley assemblies (41) is matched with that of the connecting columns (22), each pulley assembly (41) comprises a rotating sleeve (411) rotatably mounted on the connecting column (22) and two friction wheels (412) respectively mounted at the upper end and the lower end of the rotating sleeve (411), and the friction wheels (412) abut against the inner wall of the circulating track (1); the friction wheel (412) and the rotating sleeve (411) are arranged in a circumferential linkage mode.

3. The vacuum system leak detection apparatus using a thermal imaging technique according to claim 2, characterized in that: the drive assembly (42) comprises a first pulley (421), a second pulley (422), a rotary motor (424), a worm gear (425) and a worm (426); the mounting plate (21) is rotatably provided with two rotating rods (24), the number of the first belt pulleys (421) is two, and the two first belt pulleys (421) are respectively and coaxially connected with the two rotating rods (24); the number of the second belt pulleys (422) is two, the two second belt pulleys (422) are respectively sleeved on the two rotating sleeves (411) correspondingly, and each second belt pulley (422) is fixedly connected with the rotating sleeve (411); the adjacent first belt pulley (421) and the second belt pulley (422) are in transmission connection through a tension belt (423);

the number of the worm wheels (425) is two, the two worm wheels (425) are respectively and coaxially connected with the two rotating rods (24), the worm (426) is rotatably arranged between the two worm wheels (425), and the worm (426) is simultaneously in meshing transmission with the two worm wheels (425); the rotating motor (424) is fixed on the mounting plate (21), and an output shaft of the rotating motor (424) is connected with the worm (426).

4. The vacuum system leak detection apparatus using a thermal imaging technique according to claim 2, characterized in that: the circulating track (1) comprises a bottom plate (11) fixedly arranged and side plates (12) arranged on two sides of the bottom plate (11) in the width direction, wherein integrally formed baffle plates (13) are arranged on the opposite sides of the side plates (12), and the baffle plates (13) are positioned on one sides of the side plates (12) far away from the bottom plate (11).

5. The vacuum system leak detection apparatus using a thermal imaging technique according to claim 4, wherein: the bottom of the baffle (13) is bonded with a damping rubber pad (14), and the damping rubber pad (14) abuts against a friction wheel (412) at the upper end of the rotating sleeve (411).

6. The vacuum system leak detection apparatus using a thermal imaging technique according to claim 4, wherein: a plurality of ball grooves are formed in the bottom of the mounting plate (21) below the two mounting plates (21), and balls (23) capable of rolling freely are mounted in the ball grooves.

7. The vacuum system leak detection apparatus using a thermal imaging technique according to claim 1, characterized in that: install lift platform (5) between thermal imaging camera (3) and moving vehicle frame (2), lift platform (5) are including vertical fixation in moving vehicle frame (2) upper surface linear module (51) and install in linear module (51) and remove fixing base (52) of holding, thermal imaging camera (3) are fixed in fixing base (52).

8. The vacuum system leak detection apparatus using a thermal imaging technique according to claim 7, wherein: the bottom of fixing base (52) is equipped with refrigeration mechanism (6), refrigeration mechanism (6) are including refrigeration case (61) and connect in blowing pipe (62) of refrigeration case (61), the one end that refrigeration case (61) were kept away from in blowing pipe (62) is fixed with air cock (63), air cock (63) are just to vacuum system's lateral wall.