High-frequency suction device between heat transfer pipes of evaporator

Abstract

The high-frequency suction device between the evaporator heat transfer pipes comprises a suction belt assembly, the suction belt assembly comprises a supporting belt body which can be arranged in gaps of the heat transfer pipes in an inserted mode, a suction channel is formed in the supporting belt body, and the supporting belt body is provided with a suction hole which penetrates through the side wall and is communicated with the suction channel; the supporting belt body is mounted on the wall climbing mechanism; the wall climbing mechanism can suck the belt assembly into the evaporator heat transfer pipe, and then the high-frequency suction mechanism generates negative pressure to suck foreign matter in the evaporator heat transfer pipe through the suction holes; meanwhile, the high-frequency suction mechanism is used for controlling the suction frequency, the suction belt assembly is driven to vibrate through the change of the suction frequency, the vibration is transmitted to the foreign matter body to change the static state of the foreign matter between the heat transfer pipes, so that the foreign matter is easily sucked, and the vibration of the suction belt assembly enables the foreign matter entering the suction belt assembly not to easily block a hole channel.

Description

Technical Field

[0001] The invention relates to the field of nuclear power evaporators, and in particular to a high-frequency suction device between heat transfer tubes of an evaporator. Background Art

[0002] The steam generator of a nuclear power plant is an important heat exchange equipment in the nuclear power plant. At the same time, the steam generating heat transfer tube is a barrier between the primary and secondary sides. Foreign matter on the secondary side of the steam generator may cause corrosion and damage to the heat transfer tube, which in turn may lead to the leakage of radioactive substances in the heat transfer tube, resulting in nuclear safety problems. The inspection and treatment of foreign matter on the secondary side of the steam generator is an important task in the overhaul of a nuclear power plant. At present, the handling of foreign matter relies on simple grabbing tools and manual grabbing. The space of the secondary side corridor and the central corridor of the evaporator is large and the operability is good.

[0003] However, the spacing between the heat transfer tubes is small (spacing < 8mm), and manual operation is difficult. Using ordinary thin tubes to enter the tubes for suction work has problems such as difficulty in entering the tubes, easy deformation of the suction tube, and difficulty in suction when foreign objects are close to the tube sheet. At the same time, relying on manual operation in the steam generator room, the efficiency of handling small particle foreign objects is low, the work intensity of personnel is high, and the radiation dose is high. 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 the present invention to solve the technical problem is: a high-frequency suction device between the heat transfer tubes of the evaporator, comprising:

[0006] A suction belt assembly, the suction belt assembly comprising a support belt body which can be inserted into the gap between the heat transfer tubes and has a suction channel inside, the support belt body having a suction hole penetrating through a side wall and communicating with the suction channel;

[0007] A wall climbing mechanism, the supporting belt body is installed on the wall climbing mechanism, and the wall climbing mechanism is movably adsorbed on the evaporator to drive the supporting belt body to move in the gap between 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 holes, and cause the suction belt assembly to vibrate.

[0009] Furthermore, in the high-frequency suction device between the evaporator heat transfer tubes, it is preferred that the suction hole is opened at the end of the supporting belt body;

[0010] The suction belt assembly also includes an inner lining tube disposed in the supporting belt body, the suction channel is formed in the inner lining tube and is communicated with the suction hole.

[0011] Furthermore, in the high-frequency suction device between heat transfer tubes of the evaporator, it is preferred that an imaging element arranged in parallel with the suction hole is provided on the end surface of the support belt.

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

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

[0014] The guide head driving motor is installed on the wall climbing mechanism, the guide head is rotatably installed on the output end of the guide head driving motor, and the support belt slot is provided on the guide head;

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

[0016] Furthermore, in the high-frequency suction device between the evaporator heat transfer tubes, it is preferred that the belt transport mechanism further includes a support belt drive motor, a support belt drive wheel, a guide hole, and a guide tooth;

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

[0018] The guide hole is opened on the side wall of the support belt body, and the guide tooth is arranged on the rim surface of the support belt driving wheel. The guide tooth cooperates with the guide hole to drive the support belt body forward and backward in the support belt slot when the support belt driving wheel rotates.

[0019] Furthermore, in the high-frequency suction device between the heat transfer tubes of the evaporator, the wall climbing mechanism preferably includes a travel drive assembly, which drives the wall climbing mechanism to move on the evaporator, and the travel drive assembly includes a shell, a travel drive motor, a transmission assembly, and a travel wheel;

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

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

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

[0023] There are three monitoring elements, which are respectively installed on the front wall and the left and right side walls of the shell.

[0024] Furthermore, in the high-frequency suction device between the heat transfer tubes of the evaporator, it is preferred that the wall climbing mechanism further includes a vacuum adsorption component arranged on the travel drive component, which is adsorbed on the evaporator;

[0025] Alternatively, the running wheel is a magnetic running wheel, and magnets are installed in a circular array inside the running wheel.

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

[0027] The high negative pressure fan assembly generates negative pressure suction for suction, 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 turns the negative pressure suction on and off;

[0028] The filter assembly includes a barrel, a filter cartridge, a barrel cover, 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 barrel cover is installed on the top of the cylinder, the filter is installed on the bottom of the barrel cover, and the filter is located inside the filter cartridge, the high-frequency generator is connected and installed on the top of the barrel cover, the airflow sucked by the suction hole is guided into the cylinder, and after passing through the filter cartridge and the filter to filter and intercept foreign matter in the airflow, it is guided to the high-frequency generator.

[0030] The implementation of the present invention has the following beneficial effects: the wall climbing mechanism can use the suction belt assembly to enter the evaporator heat transfer tube, and then the high-frequency suction mechanism generates negative pressure to suck foreign matter inside the evaporator heat transfer tube through the suction hole; at the same time, the high-frequency suction mechanism is used to generate periodic negative pressure in the suction channel, thereby driving the suction belt assembly to vibrate, and the vibration is transmitted to the foreign matter body to change the static state of the foreign matter between the heat transfer tubes, making it easy to be sucked, and the vibration of the suction belt assembly makes it difficult for foreign matter entering the suction belt assembly to block the channel. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0032] Figure 1 It is a schematic structural diagram of the high-frequency suction device between the heat transfer tubes of the evaporator according to the present invention from a first perspective;

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

[0034] Figure 3 The high-frequency suction device between the heat transfer tubes of the evaporator of the present invention Figure 2 A is an enlarged schematic diagram;

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

[0036] Figure 5 It 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 of the present invention;

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

[0038] Explanation of the symbols in the schematic diagram:

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

[0040] 2. Wall climbing mechanism; 21. Housing; 22. Travel drive motor; 23. Transmission assembly; 24. Travel wheel; 25. Monitoring element;

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

[0042] 4. Belt transport mechanism; 42. Guide head; 43. Support belt slot; 46. Guide hole. DETAILED DESCRIPTION

[0043] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0044] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0045] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

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

[0047] A suction belt assembly 1, the suction belt assembly 1 comprises a support belt body 11 which can be inserted into the gap between the heat transfer tubes and has a suction channel inside, and the support belt body 11 is provided with a suction hole 12 which penetrates the side wall and communicates with the suction channel;

[0048] A wall climbing mechanism 2, on which the support belt 11 is mounted, and the wall climbing mechanism 2 is movably adsorbed on the evaporator to drive the support belt 11 to move in the gap between 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 holes 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 foreign matter in the gap between the heat transfer tubes.

[0051] The supporting belt body 11 is made of resin material and has a flexible structure; the present application may also be made of metal material, which is not limited in the present application.

[0052] Depend on Figures 2 to 3 It is shown that the suction hole 12 is opened at the end of the supporting belt body 11; the suction belt assembly 1 also includes an inner lining tube 13 arranged in the supporting belt body 11, and a suction channel is formed in the inner lining tube 13 and communicated with the suction hole 12.

[0053] Preferably, six inner liner tubes 13 are provided, that is, six suction holes 12 are provided, which can effectively increase the air intake compared with single-tube suction and can also avoid deformation of the suction tube caused by excessive suction force at the rear end.

[0054] The wall-climbing mechanism solves the problem that the suction tool has to enter the heat transfer tubes manually during the foreign body suction process, which results in great difficulty and low accuracy. Secondly, the suction belt assembly solves the problems of low single-tube suction efficiency, easy clogging, easy deformation, and inability to monitor the suction process.

[0055] An imaging element 14 is provided on the end surface of the support belt 11 so as to be aligned with the suction hole 12 .

[0056] Preferably, the imaging 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 entering the tubes and the process of sucking foreign matter between the tubes can be visualized.

[0057] Depend on Figures 2 to 4 It is shown that a belt walking mechanism 4 is provided between the supporting belt body 11 and the wall climbing mechanism 2 to drive the supporting belt body 11 to move.

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

[0059] The tape transport mechanism 4 includes a guide head drive motor, a guide head 42, and a support belt slot 43; the guide head drive motor is installed on the wall climbing mechanism 2, the guide head 42 is rotatably installed at the output end of the guide head drive motor, and the support belt slot 43 is provided 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 body 11 is installed through the support belt slot 43 of the guide head 42. When the guide head driving motor drives the guide head 42 to rotate, the support belt body 11 is pushed to rotate under the interference of the edge of the support belt slot 43, thereby adjusting the position angle of the support belt body 11 between the heat transfer tubes, so that it can be inserted between the heat transfer tubes at will.

[0061] The tape walking mechanism 4 also includes a support belt driving motor, a support belt driving wheel, a guide hole 46, and a guide tooth; the support belt driving wheel is installed at the output end of the support belt driving motor and is located in 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 driving wheel. The guide tooth cooperates with the guide hole 46 to drive the support belt body 11 to move forward and backward in the support belt slot 43 when the support belt driving wheel rotates.

[0062] Preferably, the guide teeth are arranged on a circle on the rim surface of the support belt driving wheel, and the guide holes 46 are arranged in a row on the surface of the support belt body 11. Moreover, the spacing between the guide teeth is equal to the spacing between the guide holes 46, so that the guide teeth and the guide holes 46 are easy to cooperate with each other, and when the support belt driving wheel rotates, the guide teeth will be inserted into the guide holes 46.

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

[0064] Alternatively, the guide teeth may be in a conical structure to facilitate insertion into the guide hole 46 .

[0065] Depend on Figures 4 to 5 It is shown that the wall-climbing mechanism 2 includes a travel drive assembly, which drives the wall-climbing mechanism 2 to move on the evaporator. The travel drive assembly includes a shell 21, a travel drive motor 22, a transmission assembly 23, and a travel wheel 24; the travel drive motor 22, the support belt drive motor and the guide head drive motor are installed inside the shell 21, and the travel wheel 24 is connected to the travel drive motor 22 through the transmission assembly 23.

[0066] Preferably, the travel drive motor 22 drives the travel wheel 24 to rotate through the transmission assembly 23, and then the travel wheel 24 moves in the evaporator.

[0067] Also preferably, the transmission assembly 23 is two bevel gears, the two bevel gears mesh with each other, and the two bevel gears are respectively mounted on the output end of the travel drive motor 22 and the rotating shaft of the travel wheel 24.

[0068] Alternatively, the transmission assembly 23 may further include a reducer, the output end of the travel drive motor 22 is connected to the reducer, and the reducer is connected to one of the bevel gears.

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

[0070] Preferably, the two running wheels 24 drive the shell 21 to move in the evaporator. When the shell 21 needs to rotate, the shell 21 rotates to a certain direction, and the running wheel 24 on that side slows down.

[0071] Alternatively, anti-skid grooves may be provided on the surface of the travel wheel 24 to prevent the wheel from slipping on the wall of the evaporator during driving.

[0072] Specifically, when the housing 21 needs to rotate to the left, the speed of the running wheel 24 on the left side slows down, or the speed of the running wheel 24 on the right side speeds up. When the housing 21 needs to rotate to the right, the speed of the running wheel 24 on the right side slows down, or the speed of the running wheel 24 on the left side speeds up.

[0073] The wall-climbing mechanism 2 further comprises a vacuum adsorption component arranged on the travel drive component, which is adsorbed on the evaporator; or, the travel wheel 24 is a magnetic travel wheel 24, and magnets are installed in a circular array inside the travel wheel 24.

[0074] Preferably, multiple magnets are provided, and multiple magnets are installed in a circular array inside the running wheel 24. Since the wall surface is made of magnetic conductive material, there are protruding obstacles such as welds, and for the wall surface of the steam generator enclosure with a small curvature radius, the curved surface will cause gaps in the negative pressure adsorption, resulting in leakage problems. Therefore, the permanent magnetic adsorption method is selected from the adsorption reliability to meet the actual requirements. The running wheel 24 is magnetically adsorbed on the wall surface of the evaporator to move.

[0075] Alternatively, the vacuum adsorption component adopts a flexible vacuum suction cup, which is deformable and can also avoid negative pressure adsorption leakage.

[0076] Depend on Figure 1 and Figure 6 It is given 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 a negative pressure suction force for suction, and is connected to the high-frequency generator 32 through the connecting pipe 33, the negative pressure suction force is transmitted to the high-frequency generator 32, and the high-frequency generator 32 periodically turns the negative pressure suction force on and off; the filter assembly includes a cylinder 34, a filter cartridge 35, a barrel cover 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 barrel cover 36 is installed on the top of the cylinder 34, the filter 37 is installed at the bottom of the barrel cover 36, and the filter 37 is located inside the filter cartridge 35, the high-frequency generator 32 is connected and installed on the top of the barrel cover 36, the airflow sucked by the suction hole 12 is guided into the cylinder 34, and the foreign matter in the airflow is filtered and intercepted by the filter cartridge 35 and the filter 37 and then guided to the high-frequency generator 32.

[0077] Two connecting pipes 33 are provided, wherein two ends of one connecting pipe 33 are respectively connected and installed at the high negative pressure fan assembly 31 and the high frequency generator 32 , and two ends of the other connecting pipe 33 are respectively connected and installed at the cylinder 34 and the supporting belt body 11 .

[0078] Preferably, the high negative pressure fan assembly 31 includes a negative pressure fan and a muffler. The negative pressure fan generates negative pressure suction, which reaches the high-frequency generator 32 after passing through the muffler and the connecting pipe 33 and then enters the filter 37. Then, the filter 37 passes through the filter cartridge 35 and the connecting pipe 33 to reach the support belt 11. Finally, the suction holes 12 on the support belt 11 are used to suck out foreign matter in the gap between the heat transfer tubes.

[0079] Alternatively, the foreign matter sucked by the suction hole 12 passes through the inner lining tube 13 and the connecting pipe 33 into the cylinder 34, the foreign matter is filtered by the filter cartridge 35 and the filter 37, and the negative pressure suction wind returns to the negative pressure fan.

[0080] Specifically, the silencer eliminates the sound generated by the wind speed of the negative pressure fan.

[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. It is used to control the on and off of the negative-pressure wind force generated by the high-negative-pressure fan assembly 31, allowing the negative-pressure wind force of the high-negative-pressure fan assembly 31 to enter the filter assembly, or preventing the negative-pressure suction force 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 on and off of the negative pressure airflow in the device, thereby causing the support belt 11 to vibrate. Specifically, the high frequency generator 32 generates a certain frequency action to control the on and off of the connecting pipe 33, so that the negative pressure airflow of the high negative pressure fan assembly 31 is on and off, so that it is periodically transmitted to the filter assembly, and then transmitted to the support belt 11 through the connecting pipe 33, so that the front end of the support belt 11 generates frequency vibration between the tubes, contacts the foreign matter between the heat transfer tubes, changes the static state of the foreign matter, and makes it easy for the foreign matter to be sucked into the inner lining tube 13 of the support belt 11; at the same time, the existence of vibration makes it easy for the foreign matter in the inner lining tube 13 to pass through and is not easy to be blocked in the inner lining tube 13.

[0083] It is also possible that the connecting pipe 33 is made of a flexible hose, one end of which is mounted on the supporting belt body 11, and the other end of which is mounted 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 electric control cabinet, and a control panel; the high negative pressure fan assembly 31, the filter assembly, the electric control cabinet, and the control panel are all installed on the frame trolley.

[0085] The high negative pressure fan assembly is running, and 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 above-mentioned 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 frame trolley structure is adopted to facilitate the movement and transportation of the equipment, and the electric control cabinet is used to provide power control.

[0087] Specific steps of suction:

[0088] The wall climbing mechanism 2 carries the support belt 11 into the evaporator, and the belt walking mechanism inserts the support belt 11 into the gap between the heat transfer tubes of the evaporator;

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

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

[0091] Beneficial effects obtained by the suction belt assembly 1, the wall climbing mechanism 2, the high-frequency suction mechanism 3, etc.: the wall climbing mechanism 2 of the present invention solves the problem that the grabbing tool relies on manual entry into the heat transfer tubes during the foreign body grabbing process, which is difficult and has low entry accuracy; secondly, the suction belt assembly 1 solves the problems of low single-tube suction efficiency, easy clogging, easy deformation, and inability to monitor the suction process; at the same time, the high-frequency suction mechanism 3 is used to control the suction frequency, and the suction belt assembly 1 is driven to vibrate through the change of the suction frequency. The vibration is transmitted to the foreign body to change the static state of the foreign body between the heat transfer tubes, making it easy to be sucked, and the vibration of the suction belt assembly 1 makes it difficult for foreign objects entering the suction belt assembly 1 to block the channel.

[0092] When the present invention is in use: the high-frequency suction mechanism 3 is connected to the support belt body 11, the support belt body 11 is installed in the wall climbing mechanism 2, and 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 ring corridor of the steam generator tube plate. According to work needs, the support belt body 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 walking mechanism 4 drives the support belt body 11 backward, and sucks foreign matter such as fine particles between the heat transfer tubes during the retreat process.

[0093] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the coverage 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: A suction belt assembly (1), the suction belt assembly (1) comprising a support belt body (11) which can be inserted into a gap between heat transfer tubes and has a suction channel inside, the support belt body (11) having a suction hole (12) penetrating a side wall and communicating with the suction channel; A wall climbing mechanism (2), the support belt body (11) being mounted on the wall climbing mechanism (2), and the wall climbing mechanism (2) being movably adsorbed on the evaporator to drive the support belt body (11) to move in the gap between the heat transfer tubes; as well as 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.

2. The high-frequency suction device between heat transfer tubes of the evaporator according to claim 1, characterized in that: The suction hole (12) is opened at the end of the supporting belt body (11); The suction belt assembly (1) further comprises an inner lining tube (13) arranged in the supporting belt body (11); the suction channel is formed in the inner lining tube (13) and is connected to the suction hole (12).

3. The high-frequency suction device between heat transfer tubes of the evaporator according to claim 1, characterized in that: The end surface of the supporting belt body (11) is provided with an imaging element (14) arranged side by side with the suction hole (12).

4. The high-frequency suction device between heat transfer tubes of the evaporator according to claim 1, characterized in that: A belt walking mechanism (4) is provided between the supporting belt body (11) and the wall climbing mechanism (2) to drive the supporting belt body (11) to move.

5. The high-frequency suction device between heat transfer tubes of the evaporator according to claim 4, characterized in that: The tape transport mechanism (4) comprises a guide head driving motor, a guide head (42), and a support tape slot (43); The guide head driving motor is mounted on the wall climbing mechanism (2), the guide head (42) is rotatably mounted on the output end of the guide head driving motor, and the support belt slot (43) is provided on the guide head (42); The support belt body (11) passes through the support belt slot (43) to be driven to rotate by the guide head (42).

6. The high-frequency suction device between heat transfer tubes of the evaporator according to claim 5, characterized in that: The belt walking mechanism (4) also includes a supporting belt driving motor, a supporting belt driving wheel, a guide hole (46), and a guide tooth; The support belt driving wheel is installed at the output end of the support belt driving 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 arranged on the rim surface of the support belt driving wheel. The guide tooth cooperates with the guide hole (46) and is used to drive the support belt body (11) forward and backward in the support belt slot (43) when the support belt driving wheel rotates.

7. The high-frequency suction device between heat transfer tubes of the evaporator according to claim 6, characterized in that: The wall climbing mechanism (2) comprises a travel drive assembly, which drives the wall climbing mechanism (2) to move on the evaporator, and the travel drive assembly comprises a housing (21), a travel drive motor (22), a transmission assembly (23), and a travel wheel (24); The travel drive motor (22), the support belt drive motor and the guide head drive motor are installed inside the housing (21), and the travel wheel (24) is connected to the travel drive motor (22) via the transmission assembly (23).

8. The high-frequency suction device between heat transfer tubes of the evaporator according to claim 7, characterized in that: Two running wheels (24) are provided, and the two running wheels (24) are diagonally arranged on both sides of the housing (21); The travel drive assembly further comprises a monitoring element (25), wherein the monitoring element (25) is mounted on the housing (21); Three monitoring elements (25) are provided, and the three monitoring elements (25) are respectively installed on the front wall and the left and right side walls of the housing (21).

9. The high-frequency suction device between heat transfer tubes of the evaporator according to claim 7, characterized in that: The wall climbing mechanism (2) further comprises a vacuum adsorption component arranged on the travel drive component and adsorbed on the evaporator; Alternatively, the running wheel (24) is a magnetic running wheel (24), and magnets are installed in a circumferential array inside the running wheel (24).

10. The high-frequency suction device between heat transfer tubes of an evaporator according to claim 1, characterized in that: The high-frequency suction mechanism (3) comprises 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 turns the negative pressure suction on and off; The filter assembly comprises a barrel (34), a filter cartridge (35), a barrel cover (36), and a filter (37); The support belt body (11) is connected to the cylinder (34) through the connecting pipe (33); the filter cartridge (35) is installed inside the cylinder (34); the barrel cover (36) is installed on the top of the cylinder (34); the filter (37) is installed at the bottom of the barrel cover (36), and the filter (37) is located inside the filter cartridge (35); the high-frequency generator (32) is connected and installed on the top of the barrel cover (36); the airflow sucked by the suction hole (12) is guided into the cylinder (34), and after filtering and intercepting foreign matter in the airflow through the filter cartridge (35) and the filter (37), it is guided to the high-frequency generator (32).

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