High-frequency suction device between evaporator heat transfer tubes

Abstract

This invention discloses a high-frequency suction device between heat transfer tubes of an evaporator, comprising a suction belt assembly, which includes a support belt body that can be inserted into the gap between the heat transfer tubes and has a suction channel inside. The support belt body has a suction hole that penetrates the side wall and communicates with the suction channel. A wall-climbing mechanism is also included, with the support belt body mounted on the wall-climbing mechanism. The wall-climbing mechanism allows the suction belt assembly to enter the heat transfer tubes of the evaporator, and then the high-frequency suction mechanism generates negative pressure to suction foreign objects inside the heat transfer tubes through the suction hole. Simultaneously, the high-frequency suction mechanism controls the suction frequency, and the suction belt assembly vibrates as the suction frequency changes. The vibration is transmitted to the foreign object body, changing the static state of the foreign object between the heat transfer tubes, making it easier to be suctioned. The vibration of the suction belt assembly also makes it less likely for foreign objects entering the suction belt assembly to block the channel.

Description

Technical Field

[0001] This invention relates to the field of nuclear power plant evaporators, and more particularly to a high-frequency suction device between heat transfer tubes in an evaporator. Background Technology

[0002] The steam generator is a crucial heat exchange device in a nuclear power plant. The steam generator's heat transfer tubes act as a barrier between the primary and secondary sides. Foreign objects protruding from the secondary side of the steam generator can cause corrosion and damage to the heat transfer tubes, potentially leading to the leakage of radioactive materials and nuclear safety issues. Inspecting and handling foreign objects on the secondary side of the steam generator is a vital part of nuclear power plant overhauls. Currently, foreign object handling relies on simple grabbing tools and manual removal. The secondary side tube gallery and central tube gallery of the evaporator offer ample space and good operability.

[0003] However, the spacing between heat transfer tubes is small (spacing < 8mm), making manual operation difficult. Using ordinary thin tubes to enter the tube space for suction work presents problems such as difficulty in entering the tube space, easy deformation of the suction tube, and difficulty in suctioning foreign objects close to the tube sheet. At the same time, relying on manual operation in the steam generator room results in low efficiency in handling small particulate foreign objects, high labor intensity for personnel, and high radiation dose. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a high-frequency suction device between heat transfer tubes of an evaporator.

[0005] The technical solution adopted by this invention to solve its technical problem is: a high-frequency suction device between evaporator heat transfer tubes, comprising:

[0006] A suction belt assembly, comprising a support belt body that can be inserted into the gap of a heat transfer tube and has a suction channel inside, the support belt body having a suction hole that penetrates the side wall and communicates with the suction channel;

[0007] A wall-climbing mechanism, wherein the support belt is mounted on the wall-climbing mechanism, and the wall-climbing mechanism is movably adsorbed onto the evaporator, thereby driving the support belt to move within the gaps in the heat transfer tubes; and

[0008] A high-frequency suction mechanism is connected to the suction belt assembly and is used to generate periodic negative pressure in the suction channel, perform suction through the suction hole, and cause the suction belt assembly to vibrate.

[0009] Furthermore, in the high-frequency suction device between the heat transfer tubes of the evaporator, the suction hole is preferably opened at the end of the support belt;

[0010] The suction belt assembly also includes an inner liner tube disposed within the support belt body, wherein the suction channel is formed within the inner liner tube and communicates with the suction hole.

[0011] Furthermore, in the high-frequency suction device between the heat transfer tubes of the evaporator, preferably, a camera element is provided on the end face of the support belt, which is arranged parallel to the suction hole.

[0012] Furthermore, in the high-frequency suction device between the heat transfer tubes of the evaporator, a conveyor belt mechanism is preferably provided between the support belt and the wall climbing mechanism to drive the support belt to move.

[0013] Furthermore, in the high-frequency suction device between the heat transfer tubes of the evaporator, the conveyor belt mechanism preferably includes a guide head drive motor, a guide head, and a support belt slot;

[0014] The guide head drive motor is mounted on the wall climbing mechanism, the guide head is rotatably mounted on the output end of the guide head drive motor, and the support belt has a slot formed on the guide head;

[0015] The support belt passes through the support belt slot so as to be rotated by the guide head.

[0016] Furthermore, in the high-frequency suction device between the heat transfer tubes of the evaporator, the conveyor belt mechanism preferably further includes a support belt drive motor, a support belt drive wheel, a guide hole, and guide teeth;

[0017] The support belt drive wheel is installed at the output end of the support belt drive motor and is located inside the guide head;

[0018] The guide hole is formed on the side wall of the support belt body, and the guide tooth is disposed on the rim surface of the support belt drive wheel. The guide tooth cooperates with the guide hole and is used to drive the support belt body to move forward and backward in the support belt groove when the support belt drive wheel rotates.

[0019] Furthermore, in the high-frequency suction device between the heat transfer tubes of the evaporator, the climbing mechanism preferably includes a walking drive assembly to drive the climbing mechanism to move on the evaporator. The walking drive assembly includes a housing, a walking drive motor, a transmission assembly, and walking wheels.

[0020] The walking drive motor, the support belt drive motor, and the guide head drive motor are installed inside the housing, and the walking wheel is connected to the walking drive motor through the transmission assembly.

[0021] Furthermore, in the high-frequency suction device between the heat transfer tubes of the evaporator, preferably two wheels are provided, and the two wheels are arranged diagonally on both sides of the shell;

[0022] The walking drive assembly also includes a monitoring element, which is mounted on the housing;

[0023] The monitoring element is provided in three parts, which are respectively installed on the front wall and the left and right side walls of the housing.

[0024] Furthermore, in the high-frequency suction device between the heat transfer tubes of the evaporator, the wall-climbing mechanism preferably also includes a vacuum adsorption component disposed on the walking drive assembly, which adsorbs onto the evaporator;

[0025] Alternatively, the walking wheel is a magnetic walking wheel, with magnets installed in a circumferential array inside the walking wheel.

[0026] Furthermore, in the high-frequency suction device between the heat transfer tubes of the evaporator, the high-frequency suction mechanism preferably includes a high negative pressure fan assembly, a high-frequency generator, a filter assembly, and connecting pipes;

[0027] The high negative pressure fan assembly generates negative pressure suction for drawing, and is connected to the high frequency generator through the connecting pipe. The negative pressure suction is transmitted to the high frequency generator, and the high frequency generator periodically switches the negative pressure suction on and off.

[0028] The filtration assembly includes a cylinder, a filter cartridge, a lid, and a filter.

[0029] The support belt is connected to the cylinder through the connecting pipe. The filter cartridge is installed inside the cylinder. The lid is installed on the top of the cylinder. The filter is installed at the bottom of the lid and is located inside the filter cartridge. The high-frequency generator is connected to the top of the lid. The airflow drawn by the suction hole is guided into the cylinder and, after passing through the filter cartridge and the filter to filter and intercept foreign objects in the airflow, is guided to the high-frequency generator.

[0030] The present invention has the following beneficial effects: the wall-climbing mechanism can draw the suction belt assembly into the heat transfer tube of the evaporator, and then the high-frequency suction mechanism generates negative pressure to draw foreign objects inside the heat transfer tube of the evaporator through the suction hole; at the same time, the high-frequency suction mechanism generates periodic negative pressure in the suction channel, which drives the suction belt assembly to vibrate. The vibration is transmitted to the foreign object body to change the static state of the foreign object between the heat transfer tubes, making it easier to be drawn. The vibration of the suction belt assembly makes it less likely for foreign objects entering the suction belt assembly to block the channel. Attached Figure Description

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0032] Figure 1 This is a first-view structural schematic diagram of the high-frequency suction device between the heat transfer tubes of the evaporator according to the present invention.

[0033] Figure 2 This is a schematic diagram of the suction belt assembly of the high-frequency suction device between the heat transfer tubes of the evaporator according to the present invention.

[0034] Figure 3 This invention relates to a high-frequency suction device between heat transfer tubes of an evaporator. Figure 2 Enlarged diagram of point A in the diagram;

[0035] Figure 4 This is a schematic diagram of the wall-climbing mechanism of the high-frequency suction device between the heat transfer tubes of the evaporator according to the present invention;

[0036] Figure 5 This is a schematic diagram of the internal structure of the wall-climbing mechanism of the high-frequency suction device between the heat transfer tubes of the evaporator in this invention;

[0037] Figure 6 This is a schematic diagram of the high-frequency suction mechanism of the high-frequency suction device between the heat transfer tubes of the evaporator according to the present invention.

[0038] Explanation of the labels in the diagram:

[0039] 1. Suction belt assembly; 11. Support belt body; 12. Suction hole; 13. Inner liner tube; 14. Camera element;

[0040] 2. Wall-climbing mechanism; 21. Housing; 22. Walking drive motor; 23. Transmission assembly; 24. Walking wheels; 25. Monitoring components;

[0041] 3. High-frequency suction mechanism; 31. High negative pressure fan assembly; 32. High-frequency generator; 33. Connecting pipes; 34. Cylinder; 35. Filter cartridge; 36. Bucket lid; 37. Filter;

[0042] 4. Belt conveyor mechanism; 42. Guide head; 43. Support belt slot; 46. Guide hole. Detailed Implementation

[0043] To provide a clearer understanding of the technical features, objectives, and effects of this invention, specific embodiments are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or element referred to must have a specific orientation; therefore, they should not be construed as limitations on this invention.

[0044] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "linking," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0045] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0046] The technical solution adopted by this invention to solve its technical problem is: by Figures 1 to 6 The present invention discloses a high-frequency suction device between heat transfer tubes of an evaporator, comprising:

[0047] The suction belt assembly 1 includes a support belt 11 that can be inserted into the gap of the heat transfer tube and has a suction channel inside. The support belt 11 has a suction hole 12 that penetrates the side wall and communicates with the suction channel.

[0048] The wall-climbing mechanism 2 has a support belt 11 mounted on it, and the wall-climbing mechanism 2 is movably attached to the evaporator, causing the support belt 11 to move within the gaps in the heat transfer tubes; and

[0049] The high-frequency suction mechanism 3 is connected to the suction belt assembly 1 and is used to generate periodic negative pressure in the suction channel, perform suction through the suction hole 12, and cause the suction belt assembly 1 to vibrate.

[0050] Preferably, the wall-climbing mechanism 2 drives the suction belt assembly 1 to enter the interior of the evaporator through the hand hole, and then the high-frequency suction mechanism 3 generates negative pressure suction, so that the suction hole 12 of the suction belt assembly 1 sucks the foreign objects in the gap of the heat transfer tube.

[0051] The support belt 11 is made of resin material and is a flexible structure; it can also be made of metal material, but this application does not limit it.

[0052] Depend on Figures 2 to 3 The suction hole 12 is provided at the end of the support belt 11; the suction belt assembly 1 also includes an inner liner tube 13 disposed in the support belt 11, and a suction channel is formed in the inner liner tube 13 and communicates with the suction hole 12.

[0053] Preferably, the inner liner tube 13 is provided with six tubes, that is, the suction hole 12 is provided with six tubes. Compared with single tube suction, it can effectively increase the air intake volume and also avoid the suction tube from deforming due to excessive suction force at the rear end.

[0054] The wall-climbing mechanism solves the problem of the suction tool having to manually enter the space between the heat transfer tubes, which is difficult and has low accuracy. Secondly, the suction belt assembly solves the problems of low efficiency, easy blockage, easy deformation, and inability to monitor the suction process of a single tube.

[0055] The end face of the support belt 11 is provided with a camera element 14 arranged parallel to the suction hole 12.

[0056] Preferably, the camera element 14 is a camera, which can be used to view the situation between the heat transfer tubes and the position of the support belt 11 between the heat transfer tubes on an external device. The camera is integrated at the front end of the support belt 11 to ensure that the support belt 11 can be seen when it enters the tubes, and the process of sucking out foreign objects from the tubes is also visible.

[0057] Depend on Figures 2 to 4 As shown, a conveyor belt mechanism 4 is provided between the support belt 11 and the climbing mechanism 2, which drives the support belt 11 to move.

[0058] Preferably, the conveyor belt mechanism 4 can control the support belt body 11 to move forward, backward, and rotate between the heat transfer tubes.

[0059] The conveyor belt mechanism 4 includes a guide head drive motor, a guide head 42, and a support belt slot 43. The guide head drive motor is mounted on the wall climbing mechanism 2, and the guide head 42 is rotatably mounted on the output end of the guide head drive motor. The support belt slot 43 is formed on the guide head 42. The support belt body 11 passes through the support belt slot 43 so as to be driven to rotate by the guide head 42.

[0060] Preferably, the support belt 11 is installed through the support belt slot 43 of the guide head 42. When the guide head drive motor drives the guide head 42 to rotate, the support belt 11 is pushed to rotate under the interference of the edge of the support belt slot 43, thereby adjusting the position and angle of the support belt 11 between the heat transfer tubes, so that it can be inserted into the heat transfer tubes at will.

[0061] The belt conveyor mechanism 4 also includes a support belt drive motor, a support belt drive wheel, a guide hole 46, and guide teeth. The support belt drive wheel is installed at the output end of the support belt drive motor and is located inside the guide head 42. The guide hole 46 is opened on the side wall of the support belt body 11, and the guide teeth are set on the rim surface of the support belt drive wheel. The guide teeth cooperate with the guide hole 46 to drive the support belt body 11 to move forward and backward in the support belt groove 43 when the support belt drive wheel rotates.

[0062] Preferably, guide teeth are arranged around the rim surface of the support belt drive wheel, and guide holes 46 are arranged in a row on the surface of the support belt body 11. Furthermore, the spacing between the guide teeth is equal to the spacing between the guide holes 46, which facilitates the interaction between the guide teeth and the guide holes 46. When the support belt drive wheel rotates, the guide teeth will insert into the guide holes 46.

[0063] Specifically, the support belt drive motor drives the support belt drive wheel to rotate, and the guide teeth of the support belt drive wheel are engaged in the guide hole 46. When the drive wheel rotates forward or backward, the support belt body 11 is driven forward or backward by the support belt drive wheel.

[0064] Alternatively, the guide teeth can be designed in a conical shape to facilitate insertion into the guide hole 46.

[0065] Depend on Figures 4 to 5 As shown, the wall-climbing mechanism 2 includes a walking drive assembly that drives the wall-climbing mechanism 2 to move on the evaporator. The walking drive assembly includes a housing 21, a walking drive motor 22, a transmission assembly 23, and walking wheels 24. The walking drive motor 22, the support belt drive motor, and the guide head drive motor are installed inside the housing 21. The walking wheels 24 are connected to the walking drive motor 22 through the transmission assembly 23.

[0066] Preferably, the walking drive motor 22 drives the walking wheel 24 to rotate through the transmission component 23, thereby moving the walking wheel 24 inside the evaporator.

[0067] Preferably, the transmission assembly 23 consists of two helical gears that mesh with each other, and the two helical gears are respectively mounted on the output end of the walking drive motor 22 and the shaft of the walking wheel 24.

[0068] Alternatively, the transmission assembly 23 can also have a reducer, with the output end of the travel drive motor 22 connected to the reducer, which is connected to one of the helical gears.

[0069] There are two walking wheels 24, which are arranged diagonally on both sides of the housing 21. The walking drive assembly also includes a monitoring element 25, which is installed on the housing 21. There are three monitoring elements 25, which are respectively installed on the front wall and the left and right side walls of the housing 21.

[0070] Preferably, the two wheels 24 drive the housing 21 to move inside the evaporator. When the housing 21 needs to rotate, the wheels 24 on that side of the housing 21 rotate in that direction and slow down.

[0071] Alternatively, anti-slip textures can be added to the surface of the wheels 24 to prevent the wheels from slipping on the evaporator wall during driving.

[0072] Specifically, when the housing 21 needs to turn to the left, the speed of the left-side wheel 24 decreases, or the speed of the right-side wheel 24 increases. When the housing 21 needs to turn to the right, the speed of the right-side wheel 24 decreases, or the speed of the left-side wheel 24 increases.

[0073] The wall-climbing mechanism 2 also includes a vacuum adsorption component mounted on the walking drive assembly, which is adsorbed onto the evaporator; or, the walking wheel 24 is a magnetic walking wheel 24, with magnets installed in a circumferential array inside the walking wheel 24.

[0074] Preferably, multiple magnets are arranged in a circumferential array inside the traveling wheels 24. Since the wall surface is made of a magnetically conductive material, there are protruding obstacles such as weld seams. Furthermore, for the small radius of curvature of the steam generator's enclosure wall, the curved surface can cause gaps in the negative pressure adsorption, leading to leakage problems. Therefore, permanent magnet adsorption is chosen to ensure adsorption reliability and meet practical requirements. The traveling wheels 24 move along the evaporator wall surface using magnetic adsorption.

[0075] Alternatively, the vacuum adsorption component can use a flexible vacuum suction cup. The flexible vacuum suction cup can be deformed, which can also avoid negative pressure adsorption leakage.

[0076] Depend on Figure 1 and Figure 6 The high-frequency suction mechanism 3 includes a high negative pressure fan assembly 31, a high-frequency generator 32, a filter assembly, and a connecting pipe 33. The high negative pressure fan assembly 31 generates negative pressure suction for suction and is connected to the high-frequency generator 32 through the connecting pipe 33. The negative pressure suction is transmitted to the high-frequency generator 32, and the high-frequency generator 32 periodically switches the negative pressure suction on and off. The filter assembly includes a cylinder 34, a filter cartridge 35, a lid 36, and a filter 37. The support belt 11 is connected to the cylinder 34 through the connecting pipe 33. The filter cartridge 35 is installed inside the cylinder 34, the lid 36 is installed on top of the cylinder 34, and the filter 37 is installed at the bottom of the lid 36, with the filter 37 located inside the filter cartridge 35. The high-frequency generator 32 is connected and installed on top of the lid 36. The airflow drawn by the suction hole 12 is guided into the cylinder 34 and, after being filtered and intercepted by the filter cartridge 35 and the filter 37, is guided to the high-frequency generator 32.

[0077] There are two connecting pipes 33. One connecting pipe 33 is connected to the high negative pressure fan assembly 31 and the high frequency generator 32 at both ends, and the other connecting pipe 33 is connected to the cylinder 34 and the support belt 11 at both ends.

[0078] Preferably, the high negative pressure fan assembly 31 includes a negative pressure fan and a silencer. The negative pressure fan generates negative pressure suction, which passes through the silencer and connecting pipe 33 to the high frequency generator 32 and then enters the filter 37. From the filter 37, it passes through the filter cartridge 35 and connecting pipe 33 to the support belt 11. Finally, the suction holes 12 on the support belt 11 suck up foreign objects from the gaps in the heat transfer tubes.

[0079] Alternatively, foreign objects sucked by suction hole 12 pass through inner liner pipe 13 and connecting pipe 33 into cylinder 34. The foreign objects are filtered by filter cartridge 35 and filter 37, and the negative pressure suction air returns to the negative pressure fan.

[0080] Specifically, the silencer eliminates the noise generated by the negative pressure fan's airflow.

[0081] The high-frequency generator 32 is a PLC-controlled valve. Specifically, the high-frequency generator 32 is installed between the high negative pressure fan assembly 31 and the filter assembly to control the on / off of the negative pressure airflow generated by the high negative pressure fan assembly 31, allowing the negative pressure airflow of the high negative pressure fan assembly 31 to enter the filter assembly, or preventing the negative pressure suction of the high negative pressure fan assembly 31 from entering the filter assembly. The switching frequency can be adjusted.

[0082] Vibration is generated by controlling the flow of negative pressure airflow within the control device, which in turn causes the support belt 11 to vibrate. Specifically, the high-frequency generator 32 operates at a certain frequency to control the flow of the connecting pipe 33, causing the negative pressure airflow of the high negative pressure fan assembly 31 to flow periodically to the filter assembly, and then to the support belt 11 through the connecting pipe 33. This causes the front end of the support belt 11 to vibrate at a frequency between the pipes, contacting foreign objects between the heat transfer pipes and changing the static state of the foreign objects, making it easier for them to be drawn into the inner liner tube 13 of the support belt 11. At the same time, the vibration allows foreign objects in the inner liner tube 13 to pass through easily and prevents them from clogging the inner liner tube 13.

[0083] Alternatively, the connecting pipe 33 may be made of a flexible hose, with one end of the flexible hose installed on the support belt 11 and the other end installed on the cylinder 34 via an adapter.

[0084] The high-frequency suction device between the heat transfer tubes of the evaporator also includes a frame trolley, an electrical control cabinet, and a control panel; the high negative pressure fan assembly 31, the filter assembly, the electrical control cabinet, and the control panel are all installed on the frame trolley.

[0085] When the high negative pressure fan assembly operates, the fan generates negative pressure in the filter barrel, and transmits the negative pressure to the front end of the flexible belt assembly through the flexible pipeline and the aforementioned adapter; the high frequency generator 32 sets its on and off time through the control panel to complete the periodic frequency suction and stop action.

[0086] The equipment adopts a frame trolley structure, which facilitates its movement and handling, and uses an electrical control cabinet to provide power control.

[0087] Specific steps for suction:

[0088] The wall-climbing mechanism 2 carries the support belt 11 into the evaporator, and the conveyor mechanism inserts the support belt 11 into the gap of the evaporator heat transfer tubes.

[0089] The high negative pressure fan assembly 31 generates negative pressure, and at the same time the conveyor belt mechanism drives the support belt 11 to move within the gap of the evaporator heat transfer tubes. The suction holes 12 on the support belt 11 suck up foreign objects in the gap of the heat transfer tubes.

[0090] The high-frequency generator 32 controls the frequency of the negative pressure in the suction channel to be periodically switched on and off, and the support belt 11 generates vibration and transmits it to the foreign object body.

[0091] The beneficial effects obtained by the suction belt assembly 1, the wall climbing mechanism 2, and the high-frequency suction mechanism 3 are as follows: The wall climbing mechanism 2 of this invention solves the problem that the grabbing tool relies on manual entry into the tube space during the foreign object grabbing process of the heat transfer tubes, which is difficult and has low accuracy. Secondly, the suction belt assembly 1 solves the problems of low single-tube suction efficiency, easy blockage, easy deformation, and inability to monitor the suction process. At the same time, the high-frequency suction mechanism 3 controls the suction frequency. The change in suction frequency drives the suction belt assembly 1 to vibrate. The vibration is transmitted to the foreign object body, changing the static state of the foreign object between the heat transfer tubes, making it easier to be sucked up. The vibration of the suction belt assembly 1 makes it less likely for foreign objects entering the suction belt assembly 1 to block the channels.

[0092] In use, the high-frequency suction mechanism 3 is connected to the support belt 11, and the support belt 11 is installed inside the wall-climbing mechanism 2. The wall-climbing mechanism 2 is placed inside the steam generator through the secondary side hand hole of the steam generator. The wall-climbing mechanism 2 moves in the outer corridor of the steam generator tube sheet. According to the working needs, the support belt 11 is driven into the heat transfer tube space. After reaching the designated position, the high-frequency suction component works, and at the same time, the belt-carrying mechanism 4 drives the support belt 11 backward. During the backward movement, it sucks up small particles and other foreign objects between the heat transfer tubes.

[0093] It is understood that the above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can freely combine the above technical features without departing from the concept of the present invention, and can also make several modifications and improvements, all of which fall within the protection scope of the present invention. Therefore, all equivalent transformations and modifications made with respect to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A high-frequency suction device between heat transfer tubes of an evaporator, characterized in that, include: The suction belt assembly (1) includes a support belt (11) that can be inserted into the gap of the heat transfer tube and has a suction channel inside. The support belt (11) has a suction hole (12) that penetrates the side wall and communicates with the suction channel. A wall-climbing mechanism (2), wherein the support belt (11) is mounted on the wall-climbing mechanism (2), and the wall-climbing mechanism (2) is movably adsorbed onto the evaporator, thereby driving the support belt (11) to move within the gap of the heat transfer tubes; and A high-frequency suction mechanism (3) is connected to the suction belt assembly (1) and is used to generate periodic negative pressure in the suction channel, perform suction through the suction hole (12), and cause the suction belt assembly (1) to vibrate. A conveyor belt mechanism (4) is provided between the support belt body (11) and the wall climbing mechanism (2). The conveyor belt mechanism (4) includes a guide head drive motor, a guide head (42), and a support belt slot (43). The guide head drive motor is mounted on the wall climbing mechanism (2), the guide head (42) is rotatably mounted on the output end of the guide head drive motor, and the support belt slot (43) is formed on the guide head (42); The support belt (11) passes through the support belt slot (43) and is driven to rotate by the guide head (42); the belt conveyor mechanism (4) also controls the support belt (11) to move forward and backward between the heat transfer tubes.

2. The high-frequency suction device between evaporator heat transfer tubes according to claim 1, characterized in that, The suction hole (12) is opened at the end of the support belt (11); The suction belt assembly (1) further includes an inner liner tube (13) disposed within the support belt body (11), the suction channel being formed within the inner liner tube (13) and communicating with the suction hole (12).

3. The high-frequency suction device between evaporator heat transfer tubes according to claim 1, characterized in that, The end face of the support belt (11) is provided with a camera element (14) arranged parallel to the suction hole (12).

4. The high-frequency suction device between evaporator heat transfer tubes according to claim 1, characterized in that, The conveyor mechanism (4) also includes a support belt drive motor, a support belt drive wheel, a guide hole (46), and guide teeth; The support belt drive wheel is installed at the output end of the support belt drive motor and is located inside the guide head (42); The guide hole (46) is opened on the side wall of the support belt body (11), and the guide tooth is set on the rim surface of the support belt drive wheel. The guide tooth cooperates with the guide hole (46) and is used to drive the support belt body (11) to move forward and backward in the support belt groove (43) when the support belt drive wheel rotates.

5. The high-frequency suction device between evaporator heat transfer tubes according to claim 4, characterized in that, The wall-climbing mechanism (2) includes a walking drive assembly that drives the wall-climbing mechanism (2) to move on the evaporator. The walking drive assembly includes a housing (21), a walking drive motor (22), a transmission assembly (23), and walking wheels (24). The walking drive motor (22), the support belt drive motor and the guide head drive motor are installed inside the housing (21), and the walking wheel (24) is connected to the walking drive motor (22) through the transmission assembly (23).

6. The high-frequency suction device between evaporator heat transfer tubes according to claim 5, characterized in that, Two wheels (24) are provided, and the two wheels (24) are arranged diagonally on both sides of the housing (21); The walking drive assembly also includes a monitoring element (25) mounted on the housing (21); The monitoring element (25) is provided in three parts, and the three monitoring elements (25) are respectively installed on the front wall and the left and right side walls of the housing (21).

7. The high-frequency suction device between evaporator heat transfer tubes according to claim 5, characterized in that, The wall-climbing mechanism (2) also includes a vacuum adsorption component disposed on the walking drive assembly, which adsorbs onto the evaporator; Alternatively, the walking wheel (24) is a magnetic walking wheel (24), and magnets are installed in a circumferential array inside the walking wheel (24).

8. The high-frequency suction device between evaporator heat transfer tubes according to claim 1, characterized in that, The high-frequency suction mechanism (3) includes a high negative pressure fan assembly (31), a high-frequency generator (32), a filter assembly, and a connecting pipe (33). The high negative pressure fan assembly (31) generates negative pressure suction for suction and is connected to the high frequency generator (32) through the connecting pipe (33). The negative pressure suction is transmitted to the high frequency generator (32), and the high frequency generator (32) periodically switches the negative pressure suction on and off. The filtration assembly includes a cylinder (34), a filter cartridge (35), a lid (36), and a filter (37); The support belt (11) is connected to the cylinder (34) through the connecting pipe (33). The filter cartridge (35) is installed inside the cylinder (34). The bucket cover (36) is installed on the top of the cylinder (34). The filter (37) is installed at the bottom of the bucket cover (36) and is located inside the filter cartridge (35). The high-frequency generator (32) is connected to the top of the bucket cover (36). The airflow drawn by the suction hole (12) is guided into the cylinder (34) and after passing through the filter cartridge (35) and the filter (37) to filter and intercept foreign objects in the airflow, it is guided to the high-frequency generator (32).

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