An automatic evaporator detection device

Abstract

The present invention discloses an automatic detection device for an evaporator, belonging to the technical field of evaporator detection, comprising: a guided wave detection module, a transmission module, a tube sheet positioning module and a support positioning module. The guided wave detection module includes a detection guide, an internal detection sensor and a flexible hose. One end of the internal detection sensor is coaxially connected to the detection guide, and the other end is coaxially connected to the flexible hose. A transmission flexible ruler that crosses the flexible hose is embedded in the side wall of the flexible hose along its length direction; the tube sheet positioning module includes a positioning cavity and a clamping cavity. The positioning cavity fits with the detection guide and is used to position the detection guide. The clamping cavity is coaxial with the internal detection sensor and can be reduced to clamp the heat exchange tube to be measured; the support positioning module includes a lifting driving member and a lateral driving member; the present invention can quickly fix the internal detection sensor of the guided wave detection module at a specified position of the pipe orifice, facilitate the adjustment of the position of the internal detection sensor in the pipeline, and is conducive to improving the detection efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of evaporator detection, and particularly to an automatic evaporator detection device. Background Art

[0002] The heat exchange tubes of the steam generator in Shidao Bay Nuclear Power Plant are a new type of steam generator with a vertical, once-through helical tube assembly structure independently developed in China. It can play a role in blocking radioactive heat carriers while exchanging heat. There are 19 heat exchange units in the Shidao Bay steam generator, with a total of 665 heat exchange tubes. Each heat exchange component has 5 layers of helical heat exchange tubes. From the inside to the outside, the number of heat exchange tubes in each layer is 5, 6, 7, 8, and 9 respectively, totaling 35 heat exchange tubes. The heat exchange tubes are arranged in the annular space between the outer sleeve and the central tube.

[0003] As the medium for two heat exchange materials, the heat exchange tube is an important component of the heat exchanger. Due to the influence of factors such as material erosion, cavitation, and corrosion on the heat exchange tube, common defects such as wall thickness reduction, stress corrosion, and pitting will occur after long-term use, posing potential hazards to product quality and production safety. Therefore, regular detection of heat exchange tubes has become a research hotspot.

[0004] The patent with the publication number CN205003118U provides a magnetostrictive guided wave detection probe device for detecting heat exchange tube defects. When in use, the detection device needs to be inserted into the pipeline interior. Due to the problem of space limitation inside the heat exchange tube, it is difficult to control the position of the detection device inside the tube. In actual use, the position of the detection device needs to be manually adjusted according to the situation, which is not convenient for detecting the pipeline and results in low detection efficiency. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies and propose an automatic evaporator detection device to solve the technical problem that the position of the existing evaporator detection device inside the tube is difficult to control and it is not convenient to detect the pipeline.

[0006] To achieve the above technical purpose, the technical solution of the present invention provides an automatic evaporator detection device, including:

[0007] A guided wave detection module, the guided wave detection module includes a detection guide member, an internal detection sensor, and a hose. One end of the internal detection sensor is coaxially connected to the detection guide member, and the other end is coaxially connected to the hose. A transmission flexible ruler penetrating the hose is embedded in the side wall of the hose along its length direction, and a transmission groove is formed along the length direction on one side of the transmission flexible ruler;

[0008] A transmission module, the transmission module includes a transmission wheel and a first motor, the transmission wheel is rotationally connected in a fitting manner with the transmission groove and can drive the transmission flexible ruler to translate along its length direction when rotating, and the output shaft of the first motor is connected to the transmission wheel and is used to drive the transmission wheel to rotate;

[0009] A tube sheet positioning module, the tube sheet positioning module includes a positioning cavity and a clamping cavity, the positioning cavity is fitted with the detection guiding member and is used to position the detection guiding member, the clamping cavity is coaxial with the internal detection sensor, and it can be reduced to clamp the heat exchange tube to be measured;

[0010] A support and positioning module, the support and positioning module includes a lifting driving member and a lateral driving member, and the driving ends of the lifting driving member and the lateral driving member are both connected to the transmission module and the tube sheet positioning module, and are respectively used to drive the transmission module and the tube sheet positioning module to lift or translate.

[0011] As a further improvement of the present invention, the detection guiding member includes a guiding plate arranged in a circular shape and a plurality of guiding balls rollingly connected to the guiding plate, the guiding plate is connected to the internal detection sensor, and a plurality of the guiding balls are circumferentially and uniformly arranged along the side wall of the guiding plate.

[0012] As a further improvement of the present invention, a spring is arranged inside the flexible tube along its length direction, and both ends of the spring are connected to both ends of the inner wall of the flexible tube.

[0013] As a further improvement of the present invention, the transmission module further includes a radial limiting group, the radial limiting group includes a limiting bracket and a plurality of guiding wheels rollingly connected to the limiting bracket, the transmission wheel and the first motor are both connected to the limiting bracket, the limiting bracket is connected to one of the driving ends of the lateral driving member, and a limiting groove is formed inside it, a plurality of the guiding wheels are circumferentially and uniformly arranged along the inner wall of the limiting groove, and the outer surface of the guiding wheel is recessed inward to form an annular arc groove, and a circular guiding interval that fits with the outer peripheral surface of the flexible tube is formed by enclosing between the arc grooves of a plurality of the guiding wheels.

[0014] As a further improvement of the present invention, the transmission module further includes a lateral limiting group, the lateral limiting group corresponds to the transmission wheel, and it includes a transverse plate arranged in an arc shape and a plurality of limiting balls rollingly connected to the transverse plate, the transverse plate is horizontally arranged on the radial limiting group and is coaxial with the circular guiding interval, a plurality of the balls are uniformly arranged along the length direction of the transverse plate, and the outer peripheral surfaces of a plurality of the balls are in rolling connection with the flexible tube.

[0015] As a further improvement of the present invention, the tube sheet positioning module includes a mounting frame, two first cylinders and two clamping plates. An installation groove and a positioning groove which are communicated with each other are horizontally formed in the mounting frame. The two first cylinders are symmetrically arranged in the installation groove and are connected to the side wall of the installation groove. The two clamping plates are respectively connected to the driving ends of the first cylinders in a one-to-one correspondence. The clamping plates are arc-shaped, and a circular clamping cavity is formed between the two clamping plates. The detection and guiding member is built in the positioning groove and is slidably connected with the positioning groove in a matching manner.

[0016] As a further improvement of the present invention, an infrared receiver is embedded in the installation groove, an infrared emitter corresponding to the infrared receiver is arranged on the guide plate, and the infrared receiver is electrically connected to the first motor.

[0017] As a further improvement of the present invention, the lifting driving member includes a support seat and at least two second cylinders. One end of each second cylinder is connected to the support seat, and the other end is connected to the transverse driving member and is used for driving the transverse driving member to lift.

[0018] As a further improvement of the present invention, the transverse driving member includes a guide rail, a lead screw, two sleeves and a second motor. The guide rail is connected to the driving end of the lifting driving member. The lead screw is built in the guide rail and is connected to the driving shaft of the second motor. The inner walls of the two sleeves are sleeved and threadedly connected to the lead screw, and the outer walls thereof are slidably connected to the guide rail. One of the sleeves is connected to the transmission module, and the other sleeve is connected to the tube sheet positioning module.

[0019] As a further improvement of the present invention, the internal detection sensor is an electromagnetic ultrasonic probe. The diameter of the electromagnetic ultrasonic probe is less than 13 mm, and the diameter of the electromagnetic ultrasonic probe is less than the diameters of the detection and guiding member and the hose.

[0020] Compared with the prior art, the beneficial effects of the present invention include:

[0021] By providing the guided wave detection module, the tube sheet positioning module and the support and positioning module, the device of the present invention performs detection in an internal detection manner. During use, the guided wave detection module can be limited through the positioning cavity. The lifting driving member can be used to adjust the horizontal position between the clamping cavity and the internal detection sensor and the pipe orifice. The transverse driving member can be used to adjust the transverse distance between the internal detection sensor and the measured pipe orifice. The clamping cavity can clamp the pipeline to control the positioning accuracy. Therefore, during the whole detection process, the internal detection sensor of the guided wave detection module can be quickly fixed at the specified position of the pipe orifice.

[0022] The cooperatively arranged transmission module drives the transmission wheel to rotate through the first motor. The transmission wheel can drive the transmission flexible ruler to translate along its length direction, so as to drive the guided wave detection module to extend into the pipeline, which is convenient for adjusting the position of the internal detection sensor in the pipeline and is beneficial to improving the detection efficiency.

[0023] Considering the problem of the limited space inside the heat exchange tube, the arranged transmission module does not need to enter the tube during operation, and can still control the position of the internal detection sensor in the tube to realize the detection of the heat exchange tube. Brief Description of the Drawings

[0024] Figure 1 is the overall front view sectional structure schematic diagram of the present invention;

[0025] Figure 2 is Figure 1 the sectional structure schematic diagram at A-A in

[0026] Figure 3 is the front view sectional structure schematic diagram of the tube sheet positioning module of the present invention;

[0027] Figure 4 is the front view sectional structure schematic diagram of the guided wave detection module of the present invention;

[0028] Figure 5 is the left view sectional structure schematic diagram of the hose installation of the present invention;

[0029] Figure 6 is the left view structure schematic diagram of the tube sheet positioning module of the present invention;

[0030] Figure 7 is the left view sectional structure schematic diagram of the radial limiting group of the present invention.

[0031] In the figure: 1. Guided wave detection module; 11. Detection guiding member; 111. Guide plate; 112. Guide ball; 113. Infrared emitter; 12. Internal detection sensor; 13. Hose; 131. Transmission flexible ruler; 1311. Transmission groove; 132. Spring; 2. Transmission module; 21. Transmission wheel; 22. First motor; 23. Radial limiting group; 231. Limiting bracket; 2311. Limiting groove; 232. Guide wheel; 24. Transverse limiting group; 241. Cross plate; 242. Limiting ball; 3. Tube sheet positioning module; 31. Mounting frame; 311. Mounting groove; 312. Positioning groove; 313. Infrared receiver; 32. First cylinder; 33. Clamping plate; 4. Support positioning module; 41. Lifting driving member; 411. Support seat; 412. Second cylinder; 42. Transverse driving member; 421. Guide rail; 422. Lead screw; 423. Sleeve; 424. Second motor. Detailed Embodiment

[0032] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] As Figure 1 shown, the present invention provides an automatic detection device for an evaporator, including: a guided wave detection module 1, a transmission module 2, a tube sheet positioning module 3 and a support positioning module 4.

[0034] As Figure 1 、 Figure 4 shown, the guided wave detection module 1 includes a detection guide member 11, an internal detection sensor 12 and a flexible hose 13. One end of the internal detection sensor 12 is coaxially connected to the detection guide member 11, and the other end is coaxially connected to the flexible hose 13. A transmission flexible ruler 131 that penetrates the flexible hose 13 is embedded in the side wall of the flexible hose 13 along its length direction. A transmission groove 1311 is provided along the length direction on one side of the transmission flexible ruler 131.

[0035] As Figure 1 、 Figure 2 shown, the transmission module 2 includes a transmission wheel 21 and a first motor 22. The transmission wheel 21 is rotationally connected in a fitting manner with the transmission groove 1311 and can drive the transmission flexible ruler 131 to translate along its length direction during rotation. The output shaft of the first motor 22 is connected to the transmission wheel 21 and is used to drive the transmission wheel 21 to rotate.

[0036] The tube sheet positioning module 3 includes a positioning cavity and a clamping cavity. The positioning cavity fits with the detection guide member 11 and is used to position the detection guide member 11. The clamping cavity is coaxial with the internal detection sensor 12, and it can be narrowed to clamp the heat exchange tube to be measured.

[0037] The support positioning module 4 includes a lifting driving member 41 and a lateral driving member 42. The driving ends of the lifting driving member 41 and the lateral driving member 42 are both connected to the transmission module 2 and the tube sheet positioning module 3, and are respectively used to drive the transmission module 2 and the tube sheet positioning module 3 to lift or translate.

[0038] In this device, one end of the internal detection sensor 12 is coaxially connected to the detection guide 11, and the other end is coaxially connected to the hose 13. During use, the internal detection sensor 12 enters the pipe through the guidance of the detection guide 11. Since a transmission flexible ruler 131 that traverses the hose 13 is embedded along the length direction of the side wall of the hose 13, and the transmission wheel 21 is rotatably connected in engagement with the transmission groove 1311 formed on the transmission flexible ruler 131, when the first motor 22 drives the transmission wheel 21 to rotate, the transmission wheel 21 can drive the transmission flexible ruler 131 to translate along its length direction, so as to drive the guided wave detection module 1 to extend into the pipeline, which is convenient for automatically adjusting the position of the internal detection sensor 12 in the pipeline. At the same time, the labor intensity of the staff is reduced. By providing a positioning cavity and a clamping cavity on the tube sheet positioning module 3, in cooperation with the lifting drive member 41 and the lateral drive member 42, during use, the detection guide 11 can be limited through the positioning cavity, which is convenient for controlling the distance between the guided wave detection module 1 and the tube sheet positioning module 3. Using the lifting drive member 41 can drive the guided wave detection module 1, the transmission module 2, and the tube sheet positioning module 3 to lift, so that the horizontal position between the clamping cavity and the internal detection sensor 12 and the pipe orifice can be adjusted. The lateral drive member 42 can drive the guided wave detection module 1, the transmission module 2, and the tube sheet positioning module 3 to translate laterally, and the lateral distance between the internal detection sensor 12 and the measured pipe orifice can be adjusted. Then, the clamping cavity is reduced to clamp the pipeline, realizing the control of the positioning accuracy. Thus, during the entire detection process, the internal detection sensor 12 of the guided wave detection module 1 can be quickly fixed at the specified position of the pipe orifice, which is beneficial to improving the detection efficiency.

[0039] Moreover, the hose 13 in this embodiment is made of nitrile rubber, and when it comes into contact with the pipe wall, it will not cause mechanical scratches to the heat exchange pipe. The transmission flexible ruler 131 is made of PVC material, which has a certain hardness and can cooperate with the transmission wheel 21 to achieve the transmission effect of the guided wave detection module 1. At the same time, both it and the hose 13 can be bent to a certain extent, enabling the device to be applicable to the heat exchange spiral pipe of the nuclear power high-temperature gas-cooled reactor steam generator.

[0040] As Figure 1 shown, the lifting drive member 41 includes a support seat 411 and at least two second cylinders 412. One end of each second cylinder 412 is connected to the support seat 411, and the other end is connected to the lateral drive member 42 and is used to drive the lateral drive member 42 to lift. By connecting one end of each second cylinder 412 to the support seat 411 and the other end to the lateral drive member 42 and using it to drive the lateral drive member 42 to lift, the second cylinder 412 can be used to drive the lateral drive member 42 to lift, and the tube sheet positioning module 3 and the guided wave detection module 1 can be driven to translate up and down through the lateral drive member 42.

[0041] The lateral driving member 42 includes a guide rail 421, a lead screw 422, two sleeves 423 and a second motor 424. The guide rail 421 is connected to the driving end of the lifting driving member 41. The lead screw 422 is disposed inside the guide rail 421 and connected to the driving shaft of the second motor 424. The inner walls of the two sleeves 423 are sleeved and threadedly connected to the lead screw 422, and their outer walls are slidably connected to the guide rail 421. One of the sleeves 423 is connected to the transmission module 2, and the other sleeve 423 is connected to the tube sheet positioning module 3. By providing the guide rail 421, the lead screw 422, the two sleeves 423 and the second motor 424, the second motor 424 can drive the lead screw 422 to rotate, thereby driving the two sleeves 423 to slide in the guide rail 421 to achieve the lateral adjustment of the positions of the guided wave detection module 1, the transmission module 2 and the tube sheet positioning module 3.

[0042] The internal detection sensor 12 is an electromagnetic ultrasonic probe. The diameter of the electromagnetic ultrasonic probe is less than 13 mm, and the diameter of the electromagnetic ultrasonic probe is less than the diameters of the detection guide member 11 and the hose 13. In this device, the internal detection sensor 12 uses an electromagnetic ultrasonic probe. The ultrasonic guided wave has the characteristics of single-point excitation and long-distance detection, and can realize the whole-tube detection by exciting at the end of the heat exchange tube, with a fast detection speed. The diameter of the electromagnetic ultrasonic probe is less than 13 mm, about 12.5 mm, which is convenient for inserting the electromagnetic ultrasonic probe into the heat exchange pipeline for detection.

[0043] As Figure 2 shown, the transmission module 2 further includes a lateral limiting group 24. The lateral limiting group 24 corresponds to the transmission wheel 21 and includes a transverse plate 241 arranged in an arc shape and several limiting balls 242 that are rollingly connected to the transverse plate 241. The transverse plate 241 is horizontally arranged on the radial limiting group 23 and is coaxial with the circular guiding section. A plurality of balls are evenly arranged along the length direction of the transverse plate 241, and the outer peripheral surfaces of the plurality of balls are rollingly connected to the hose 13. By providing the lateral limiting group 24, the lateral limiting group 24 is horizontally arranged on the side wall of the hose 13 and is used for guiding and positioning the hose 13. It can keep the part of the hose 13 placed in the circular guiding section straight, so that the transmission flexible ruler 131 can maintain a state of being meshed and driven with the transmission wheel 21, ensuring the transmission work of the transmission wheel 21 on the guided wave detection module 1.

[0044] As Figure 4 shown, a spring 132 is arranged inside the hose 13 along its length direction. Both ends of the spring 132 are connected to both ends of the inner wall of the hose 13. By arranging a spring 132 inside the hose 13 along its length direction and connecting both ends of the spring 132 to both ends of the inner wall of the hose 13, when the hose 13 is bent and taken out, the spring 132 generates a restoring force, which can make the hose 13 automatically reset and straighten, facilitating the subsequent use of the hose 13.

[0045] As Figure 3 、 Figure 5As shown, the detection guide member 11 includes a guide plate 111 arranged in a circular shape and a plurality of guide balls 112 that are rollingly connected to the guide plate 111. The guide plate 111 is connected to the internal detection sensor 12. The plurality of guide balls 112 are circumferentially and evenly arranged along the side wall of the guide plate 111. By connecting the guide plate 111 to the internal detection sensor 12, the plurality of guide balls 112 are circumferentially and evenly arranged along the side wall of the guide plate 111. When the guided wave detection module 1 enters the heat exchange tube, the guide plate 111 can be placed in front of the internal detection sensor 12 and slide in the tube under the action of the balls, which can reduce the friction between the guided wave detection module 1 and the pipe wall and facilitate its rapid entry into the pipe.

[0046] As Figure 3 、 Figure 6 shown, the tube sheet positioning module 3 includes a mounting frame 31, two first cylinders 32 and two clamping plates 33. The mounting frame 31 is respectively provided with a connected mounting groove 311 and a positioning groove 312 horizontally. The two first cylinders 32 are symmetrically arranged in the mounting groove 311 and connected to the side wall of the mounting groove 311. The two clamping plates 33 are respectively connected to the driving ends of the first cylinders 32. The clamping plates 33 are arranged in an arc shape, and a circular clamping cavity is formed between the two clamping plates 33. The detection guide member 11 is placed in the positioning groove 312 and is slidably connected to the positioning groove 312 in a fitting manner. By providing the two first cylinders 32 and the two clamping plates 33, the two clamping plates 33 can be driven to approach by the two first cylinders 32, so as to clamp and fix the pipe, which is convenient for fixing the device on the pipe. The provided positioning groove 312 is slidably connected to the detection guide member 11 in a fitting manner, which is convenient for positioning the detection guide member 11.

[0047] An infrared receiver 313 is embedded in the mounting groove 311. An infrared transmitter 113 corresponding to the infrared receiver 313 is provided on the guide plate 111. The infrared receiver 313 is electrically connected to the first motor 22. By using the infrared receiver 313 and the infrared transmitter 113 in cooperation, when the guide plate 111 is in the set position, the infrared transmitter 113 emits a signal, so that the infrared receiver 313 receives the signal and drives the first motor 22 to stop running, which is convenient for positioning and adjusting the position of the guided wave detection module 1 when the guided wave detection module 1 is separated from the measured pipe. In addition, a controller is also provided on the first motor 22, which is convenient for adjusting the movement speed of the first motor 22.

[0048] As Figure 7As shown in the figure, the transmission module 2 further includes a radial limiting group 23. The radial limiting group 23 includes a limiting bracket 231 and several guide wheels 232 that are rotatably connected to the limiting bracket 231. The transmission wheel 21 and the first motor 22 are both connected to the limiting bracket 231. The limiting bracket 231 is connected to one of the driving ends of the transverse driving member 42, and a limiting groove 2311 is formed inside it. The multiple guide wheels 232 are circumferentially and evenly arranged along the inner wall of the limiting groove 2311, and the outer surface of the guide wheel 232 is recessed inward to form an annular arc groove. A circular guiding interval that fits the outer peripheral surface of the hose 13 is formed by enclosing between the arc grooves of the multiple guide wheels 232. By providing the radial limiting group 23, when the hose 13 enters the heat exchange tube, the circular guiding interval of the radial limiting group 23 can guide the hose 13. Since the outer surface of the guide wheel 232 is recessed inward to form an annular arc groove, the annular arc groove of the guide wheel 232 can fit and rotatably connect with the side wall of the hose 13, which is beneficial to convey the internal detection sensor 12 into the tube. By connecting the transmission wheel 21 and the first motor 22 to the limiting bracket 231 and connecting the limiting bracket 231 to one of the driving ends of the transverse driving member 42, the transverse driving member 42 can drive the transmission wheel 21 and the first motor 22 to translate horizontally through the radial limiting group 23, thereby realizing the adjustment of the positions of the guided wave detection module 1 and the transmission module 2.

[0049] Working principle: During use, first use the second cylinder 412 to drive the guided wave detection module 1, the transmission module 2, and the tube plate positioning module 3 to lift and lower, adjust the horizontal position between the clamping cavity and the internal detection sensor 12 and the pipe orifice. Then use the second motor 424 to drive the lead screw 422 to rotate, drive the sleeve 423 to slide on the guide rail 421, and adjust the horizontal distance between the internal detection sensor 12 and the orifice of the pipe to be measured. Then use the first cylinder 32 to make the two clamping plates 33 approach to clamp the pipeline. Finally, use the first motor 22 to drive the transmission wheel 21 to rotate, drive the transmission flexible ruler 131 to translate along its length direction, so as to completely insert the internal detection sensor 12 into the pipeline to a specified distance. Connect the internal detection sensor 12 to the instrument and enter the detection interface, adjust different frequencies, intercept the signal amplitude value at the end of the pipeline to observe the signal strength. After the detection equipment completes flaw detection, then cooperate with the first motor 22, the tube plate positioning module 3, and the support positioning module 4 to move the internal detection sensor 12 out and send it to the specified flaw detection position of the next heat exchange tube for detection, realizing automatic detection.

[0050] Through the provided waveguide detection module 1, tube sheet positioning module 3 and support positioning module 4, the device of the present invention performs detection in an internal detection manner. During use, the positioning cavity can be used to limit the waveguide detection module 1. The lifting drive member 41 can be used to adjust the horizontal position between the clamping cavity and the internal detection sensor 12 and the pipe orifice. The lateral drive member 42 can be used to adjust the lateral distance between the internal detection sensor 12 and the pipe orifice of the pipe to be measured. The clamping cavity can clamp the pipeline to control the positioning accuracy, so that during the entire detection process, the internal detection sensor 12 of the waveguide detection module 1 can be quickly fixed at the specified position of the pipe orifice.

[0051] The cooperatively provided transmission module 2 drives the transmission wheel 21 to rotate through the first motor 22. The transmission wheel 21 can drive the transmission flexible ruler 131 to translate along its length direction to drive the waveguide detection module 1 to extend into the pipeline, facilitating the adjustment of the position of the internal detection sensor 12 inside the pipeline and being beneficial to improving the detection efficiency.

[0052] Considering the problem of the limited space inside the heat exchange tube, the provided transmission module 2 can still control the position of the internal detection sensor 12 inside the tube during operation to detect the heat exchange tube without entering the tube.

[0053] The specific embodiments of the present invention described above do not constitute a limitation to the protection scope of the present invention. Any other corresponding changes and deformations made according to the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An automatic detection device for an evaporator, characterized in that, it includes: A guided wave detection module, the guided wave detection module includes a detection guide, an internal detection sensor and a hose. One end of the internal detection sensor is coaxially connected to the detection guide, and the other end is coaxially connected to the hose. A transmission flexible ruler that penetrates the hose is embedded in the side wall of the hose along its length direction, and a transmission groove is provided along the length direction on one side of the transmission flexible ruler; A transmission module, the transmission module includes a transmission wheel and a first motor. The transmission wheel is rotationally connected in a fitting manner with the transmission groove and can drive the transmission flexible ruler to translate along its length direction when rotating. The output shaft of the first motor is connected to the transmission wheel and is used to drive the transmission wheel to rotate; A tube sheet positioning module, the tube sheet positioning module includes a positioning cavity and a clamping cavity. The positioning cavity fits with the detection guide and is used to position the detection guide. The clamping cavity is coaxial with the internal detection sensor and can shrink to clamp the heat exchange tube to be measured; A support and positioning module, the support and positioning module includes a lifting drive and a lateral drive, and the drive ends of the lifting drive and the lateral drive are both connected to the transmission module and the tube sheet positioning module, and are respectively used to drive the transmission module and the tube sheet positioning module to lift or translate; The detection guide includes a circular guide plate and a plurality of guide balls that are rollingly connected to the guide plate. The guide plate is connected to the internal detection sensor, and a plurality of the guide balls are circumferentially and evenly arranged along the side wall of the guide plate; The transmission module further includes a radial limit group, the radial limit group includes a limit bracket and a plurality of guide wheels that are rollingly connected to the limit bracket. The transmission wheel and the first motor are both connected to the limit bracket. The limit bracket is connected to one of the drive ends of the lateral drive, and a limit groove is provided inside it. A plurality of the guide wheels are circumferentially and evenly arranged along the inner wall of the limit groove, and the outer surface of the guide wheel is recessed inward to form an annular arc groove. A circular guide interval that fits with the outer peripheral surface of the hose is formed by enclosing between the arc grooves of a plurality of the guide wheels; The transmission module further includes a lateral limit group, the lateral limit group corresponds to the transmission wheel, and it includes a horizontally arranged arc-shaped plate and a plurality of limit balls that are rollingly connected to the arc-shaped plate. The arc-shaped plate is horizontally arranged on the radial limit group and is coaxial with the circular guide interval. A plurality of the balls are evenly arranged along the length direction of the arc-shaped plate, and the outer peripheral surfaces of a plurality of the balls are in rolling connection with the hose.

2. The automatic detection device for an evaporator according to claim 1, characterized in that, A spring is provided inside the hose along its length direction, and both ends of the spring are connected to both ends of the inner wall of the hose.

3. The automatic detection device for an evaporator according to claim 1, characterized in that, The tube sheet positioning module includes a mounting frame, two first cylinders and two clamping plates. An installation groove and a positioning groove which are communicated with each other are horizontally formed in the mounting frame. The two first cylinders are symmetrically arranged in the installation groove and are connected to the side wall of the installation groove. The two clamping plates are respectively connected to the driving ends of the first cylinders. The clamping plates are arc-shaped, and a circular clamping cavity is formed between the two clamping plates. The detection and guiding member is placed in the positioning groove and is slidably connected with the positioning groove in a fitting manner.

4. An automatic evaporator detection device according to claim 3, characterized in that an infrared receiver is embedded in the installation groove, an infrared transmitter corresponding to the infrared receiver is arranged on the guide plate, and the infrared receiver is electrically connected to the first motor.

5. An automatic evaporator detection device according to claim 1, characterized in that the lifting driving member includes a support seat and at least two second cylinders. One end of each second cylinder is connected to the support seat, and the other end is connected to the lateral driving member and is used for driving the lateral driving member to lift.

6. An automatic evaporator detection device according to claim 1, characterized in that the lateral driving member includes a guide rail, a lead screw, two sleeves and a second motor. The guide rail is connected to the driving end of the lifting driving member. The lead screw is placed in the guide rail and is connected to the driving shaft of the second motor. The inner walls of the two sleeves are sleeved and threadedly connected to the lead screw, and the outer walls thereof are slidably connected to the guide rail. One of the sleeves is connected to the transmission module, and the other sleeve is connected to the tube sheet positioning module.

7. An automatic evaporator detection device according to claim 1, characterized in that the internal detection sensor is an electromagnetic ultrasonic probe. The diameter of the electromagnetic ultrasonic probe is less than 13 mm, and the diameter of the electromagnetic ultrasonic probe is less than the diameters of the detection and guiding member and the hose.

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