Movable flushing equipment

Abstract

The utility model belongs to the technical field of nuclear power plant steam generator maintenance, and particularly relates to movable washing equipment which comprises a walking device and a washing device. The walking device comprises two walking supporting mechanisms and a walking driving mechanism, each walking supporting mechanism comprises a rack and a supporting piece movably arranged on the rack, the racks of the two walking supporting mechanisms are in sliding fit, and the supporting pieces and the to-be-cleaned pipe have the two states of an abutting state and a separation state in the first direction; the walking driving mechanism drives the two walking supporting mechanisms to relatively slide in the second direction. The flushing device comprises a spray gun frame and a spraying assembly, the spraying assembly comprises a nozzle, the spray gun frame is connected with the rack of one walking supporting mechanism, and the nozzle is used for spraying high-pressure water flow. The running device is mounted on the flushing device, so that the equipment can enter the steam generator and flush parts such as a to-be-cleaned pipe and a supporting plate which are deeper in the interior of the secondary side, and the dirt flushing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of maintenance of steam generators in nuclear power plants, and particularly relates to a mobile flushing device. Background Technique

[0002] After the steam generator in a nuclear power plant has been in operation for a long time, dirt or sludge will be generated on the secondary side of the steam generator. These dirt or sludge will accumulate on components such as heat transfer tubes and support plates inside the secondary side. Since the dirt or sludge contains a large amount of various corrosive substances, it will reduce the heat conductivity of the heat transfer tubes, cause corrosion of the heat transfer tubes, and stress corrosion cracks will occur at the connection between the heat transfer tubes and the support plates. Therefore, it is necessary to clean the dirt or sludge on the secondary side.

[0003] In the prior art, a flushing gun device that can rotate and output multiple nozzles at different angles is provided, and multiple nozzles can be rotated to flush the heat transfer tubes. However, this type of flushing gun device is only installed on the manhole of the steam generator and cannot enter the inside of the secondary side of the steam generator and move. Therefore, it is impossible to effectively flush the heat transfer tubes, support plates and other parts deeper inside the secondary side, so it is impossible to flush the dirt deep inside the steam generator, and the flushing efficiency of the dirt is low. Content of the Utility Model

[0004] The purpose of the utility model is to provide a mobile flushing device, which can enter the secondary side of the steam generator and flush the parts such as the tubes to be cleaned and the support plates deeper inside, so as to improve the flushing efficiency of the dirt.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a mobile flushing device, including:

[0007] A traveling device, the traveling device includes two traveling support mechanisms and a traveling driving mechanism. The traveling support mechanism includes a frame and a support member movably arranged on the frame. The frames of the two traveling support mechanisms are slidably matched. The support member has a butting state of butting against the tube to be cleaned along a first direction and a separating state of separating from the tube to be cleaned along the first direction. The traveling driving mechanism is used to drive the two traveling support mechanisms to slide relatively along a second direction, and the first direction and the second direction are perpendicular to each other;

[0008] A flushing device, the flushing device includes a spray gun rack and a spraying assembly. The spraying assembly includes a nozzle. The spray gun rack is connected to the frame of one of the traveling support mechanisms, and the nozzle is used to spray high-pressure water flow.

[0009] Further, the flushing device further includes a first driving member, which is arranged on the spray gun holder and is in transmission connection with the nozzle. The first driving member is used to drive the nozzle to rotate.

[0010] Further, the spraying assembly further includes a worm gear and a worm. The worm is rotatably arranged on the spray gun holder. The first driving member is in transmission connection with the worm and is used to drive the worm to rotate. The worm gear is connected to the nozzle, and the worm gear meshes with the worm.

[0011] Further, the spraying assembly includes two nozzles and two worm gears. The two nozzles are arranged at intervals along the second direction. The two worm gears are correspondingly connected to the two nozzles one by one, and the worm meshes with the two worm gears simultaneously.

[0012] Further, the number of the spraying assemblies is even. The first driving member is in transmission connection with the worms of each spraying assembly. Half of the spraying assemblies are arranged on one side of the spray gun holder along the first direction, and the other half of the spraying assemblies are arranged on the other side of the spray gun holder along the first direction.

[0013] Further, the flushing device further includes a plurality of transmission wheels rotatably arranged on the spray gun holder. The plurality of transmission wheels are meshed in sequence and arranged in sequence along the second direction. The transmission wheel at one end in the second direction is in transmission connection with the first driving member, and the transmission wheel at the other end in the second direction meshes with the worm.

[0014] Further, the traveling support mechanism further includes a second driving member, a first slider, two second sliders and two connecting rods. The first slider is slidably connected to the frame along the second direction. The two second sliders are slidably connected to the frame along the first direction. The second driving member is arranged on the frame. The second driving member is in transmission connection with the first slider and is used to drive the first slider to slide along the second direction. The two ends of the first slider along the first direction are respectively hinged to one ends of the two connecting rods, and the other ends of the two connecting rods are respectively hinged to the middle parts of the two second sliders;

[0015] There are two support members, and the two support members are correspondingly connected to the two second sliders one by one. When the second slider slides along the first direction, it drives the support member to abut against or away from the cleaning pipe.

[0016] Further, the support member has a wavy contact surface, and the contact surface is used to abut against or away from the pipe to be cleaned along the first direction.

[0017] Furthermore, the frames of the two walking support mechanisms are respectively a first frame and a second frame. The walking drive mechanism includes a third drive member and a third slider. The third slider is slidably connected to the first frame and fixedly connected to the second frame. The third drive member is disposed on the first frame, and the third drive member is in transmission connection with the third slider and is used to drive the third slider to slide along the second direction.

[0018] Furthermore, the flushing device further includes a spray gun barrel, and the spray gun barrel is communicated with the nozzle.

[0019] The mobile flushing device of the present utility model has at least the following beneficial effects:

[0020] The mobile flushing device of the present utility model includes a walking device and a flushing device. The walking device includes two walking support mechanisms and a walking drive mechanism. The walking support mechanism includes a frame and a support member movably disposed on the frame. The frames of the two walking support mechanisms are slidably matched. The support member has a contact state of abutting against the pipe to be cleaned along the first direction and a separation state of separating from the pipe to be cleaned along the first direction. The walking drive mechanism is used to drive the two walking support mechanisms to slide relatively along the second direction, and the first direction and the second direction are perpendicular to each other; the flushing device includes a spray gun rack and a spraying assembly. The spraying assembly includes a nozzle. The spray gun rack is connected to the frame of one of the walking support mechanisms, and the nozzle is used to spray high-pressure water flow. By installing a walking device on the flushing device, the device can enter the steam generator and flush parts such as the pipe to be cleaned and the support plate deeper inside the secondary side, improving the flushing efficiency of dirt. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the mobile flushing device in an embodiment of the present utility model;

[0022] Figure 2 is a schematic structural diagram of the flushing device in an embodiment of the present utility model;

[0023] Figure 3 is a top view of the structure of the flushing device in an embodiment of the present utility model;

[0024] Figure 4 is a sectional view of the structure of the flushing device in an embodiment of the present utility model;

[0025] Figure 5 is a schematic structural diagram of the walking support mechanism in an embodiment of the present utility model;

[0026] Figure 6 is a schematic structural diagram of the walking drive mechanism in an embodiment of the present utility model.

[0027] In the figure:

[0028] 1. Traveling device; 11. Traveling support mechanism; 111. Frame; 112. Support member; 113. Second driving member; 114. First slider; 115. Second slider; 116. Link; 12. Traveling driving mechanism; 121. Third driving member; 122. Third slider; 13. Guide assembly; 131. Guide seat; 132. Guide rod;

[0029] 2. Flushing device; 21. Spray gun rack; 22. Spraying assembly; 221. Nozzle; 222. Worm gear; 223. Worm; 23. First driving member; 24. Transmission wheel; 25. Spray gun barrel; 26. Docking pipe; 27. Wire threading pipe; 28. Commutator. Detailed implementation manners

[0030] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that, for the convenience of description, only the parts related to the present utility model are shown in the drawings, rather than all the structures.

[0031] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to" and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0032] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but through other features between them. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0033] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0034] This embodiment provides a mobile flushing device, which can enter the inside of the steam generator and flush parts such as the tubes to be cleaned and the support plates deeper inside the secondary side, improving the flushing efficiency of dirt.

[0035] Please refer to Figures 1 to 6 As shown, the mobile flushing device includes a traveling device 1 and a flushing device 2. The traveling device 1 includes two traveling support mechanisms 11 and a traveling drive mechanism 12. The traveling support mechanism 11 includes a frame 111 and a support member 112 movably arranged on the frame 111. The frames 111 of the two traveling support mechanisms 11 are slidably engaged. The support member 112 has a contact state of contacting the tube to be cleaned along a first direction and a separation state of separating from the tube to be cleaned along the first direction. The traveling drive mechanism 12 is used to drive the two traveling support mechanisms 11 to slide relatively along a second direction, and the first direction and the second direction are perpendicular to each other; the flushing device 2 includes a spray gun rack 21 and a spraying assembly 22. The spraying assembly 22 includes a nozzle 221. The spray gun rack 21 is connected to the frame 111 of one of the traveling support mechanisms 11, and the nozzle 221 is used to spray high-pressure water flow.

[0036] Specifically, in this embodiment, the traveling device 1 includes two traveling support mechanisms 11 and one traveling driving mechanism 12. The traveling support mechanism 11 includes a frame 111 and a support member 112. The support member 112 can slide along the first direction on the frame 111, so as to be used to abut against the surface of the pipe to be cleaned or move away from the surface of the pipe to be cleaned. The frames 111 of the two traveling support mechanisms 11 can slide relative to each other, and are connected and cooperated with the two frames 111 through the traveling driving mechanism 12. When the support member 112 of one traveling support mechanism 11 abuts against the surface of the pipe to be cleaned, the traveling driving mechanism 12 can drive the other support member 112 away from the traveling support mechanism 11 of the pipe to be cleaned to slide along the second direction. After this traveling support mechanism 11 slides to the next appropriate position, the support member 112 is extended along the first direction, and then abuts against the surface of the pipe to be cleaned. Then, the support member 112 of the traveling support mechanism 11 abutting against the surface of the pipe to be cleaned is retracted, and the above operations are repeated, so that the two traveling support mechanisms 11 can slide alternately along the second direction. The flushing device 2 includes a spray gun holder 21 and a spraying assembly 22. The spray gun holder 21 is connected to any one of the two traveling support mechanisms 11. When the two traveling support mechanisms 11 slide relative to each other along the second direction, the flushing device 2 can be driven to move along the second direction. The spraying assembly 22 includes a nozzle 221. The nozzle opening of the nozzle 221 faces the pipe to be cleaned, and the high-pressure water flow is sprayed into the interior of the secondary side along the nozzle 221, so as to flush the pipe to be cleaned and the side plate inside it.

[0037] Optionally, as Figure 2 and Figure 4 shown, the flushing device 2 further includes a first driving member 23. The first driving member 23 is arranged on the spray gun holder 21 and is in transmission connection with the nozzle 221. The first driving member 23 is used to drive the nozzle 221 to rotate. Specifically, in this embodiment, the first driving member 23 is installed on the spray gun holder 21, is in transmission connection with the nozzle 221, and is used to drive the nozzle 221 to rotate. When the nozzle 221 rotates, the movement trajectory of the water flow ejected from its nozzle opening moves along the axis of the pipe to be cleaned, so that the flushing range of the nozzle 221 is enlarged, and the flushing efficiency of dirt is improved. In this example, the first driving member 23 is specifically a pneumatic motor. In other embodiments, the first driving member 23 can be an electric motor.

[0038] Further, as Figure 2 and Figure 3As shown, the spraying assembly 22 further includes a worm gear 222 and a worm 223. The worm 223 is rotatably arranged on the spray gun holder 21. The first driving member 23 is in transmission connection with the worm 223. The first driving member 23 is used to drive the worm 223 to rotate. The worm gear 222 is connected to the nozzle 221, and the worm gear 222 meshes with the worm 223. Specifically, in this embodiment, the worm gear 222 is arranged on the nozzle 221. The worm gear 222 meshes with the worm 223. Then, the first driving member 23 drives the worm 223 to rotate, and further drives the nozzle 221 to rotate. With such an arrangement, the transmission ratio of the worm gear 222 and the worm 223 is large. On the premise of ensuring that the nozzle 221 can rotate, by designing the worm gear 222 and the worm 223 with a smaller volume, the volume of the entire flushing device 2 is reduced, which is beneficial to the movement of the device inside the steam generator. And the worm 223 can drive the worm gear 222 to rotate 360 degrees. In this embodiment, by using the worm gear 222 and the worm 223 to drive the nozzle 221 to rotate at an angle of 0 to 180 degrees, the entire pipeline of the pipe to be cleaned and the upper and lower support plates connected to both ends of the pipe to be cleaned can be flushed by the high-pressure water flow, improving the dirt flushing efficiency.

[0039] Further, as Figure 2 and Figure 3 shown, the spraying assembly 22 includes two nozzles 221 and two worm gears 222. The two nozzles 221 are arranged at intervals along the second direction. The two worm gears 222 are respectively connected to the two nozzles 221, and the worm 223 meshes with the two worm gears 222 at the same time. With such an arrangement, the mouth of one nozzle 221 faces one end in the second direction, and the mouth of the other nozzle 221 faces the other end in the second direction. When the flushing device 2 moves along the second direction, the two nozzles 221 can cover both sides of the same pipe to be cleaned. When one nozzle 221 flushes one side of a pipe to be cleaned, the traveling device 1 drives the flushing device 2 to move along the second direction, so that the other nozzle 221 can move to the other side of the pipe to be cleaned and then perform flushing. At this time, the two nozzles 221 can flush both sides of the same pipe to be cleaned in place, improving the dirt flushing efficiency. And by using one worm 223 to mesh with the two worm gears 222 at the same time, on the premise that the nozzle 221 can rotate, the number of worms 223 used is reduced, thereby reducing the overall volume of the flushing device 2, which is beneficial to the movement of the equipment inside the steam generator.

[0040] Further, as Figure 2 and Figure 3As shown, the number of injection components 22 is even. The first driving member 23 is in transmission connection with the worm 223 of each injection component 22. Half of the injection components 22 are arranged on one side of the spray gun rack 21 along the first direction, and the other half of the injection components 22 are arranged on the other side of the spray gun rack 21 along the first direction. Specifically, in this embodiment, there are at least two groups of heat transfer tube rows in the secondary side of the steam generator. Each group of heat transfer tube rows has several heat transfer tubes. The two groups of heat transfer tube rows are symmetrically arranged. The traveling device 1 can travel between the two groups of heat transfer tube rows. Therefore, there are cleaning tubes to be cleaned that need to be flushed on both sides of the flushing device 2 along the first direction. Injection components 22 are arranged on both sides of the spray gun rack 21 along the first direction. In this way, two cleaning tubes arranged at intervals along the first direction of the flushing device 2 can be flushed simultaneously, improving the dirt flushing efficiency. At the same time, one first driving member 23 can drive the injection components 22 on both sides simultaneously, saving costs while reducing the number of first driving members 23 used, thereby reducing the volume of the flushing device 2, which is beneficial for the equipment to move inside the steam generator.

[0041] Furthermore, as Figures 2 to 4 shown, the flushing device 2 further includes a plurality of transmission wheels 24 rotatably arranged on the spray gun rack 21. The plurality of transmission wheels 24 are sequentially engaged and arranged in sequence along the second direction. The transmission wheel 24 at one end in the second direction is in transmission connection with the first driving member 23, and the transmission wheel 24 at the other end in the second direction is engaged with the worm 223. The force output by the first driving member 23 is transmitted to the worm 223 by using the plurality of transmission wheels 24. The installation quantity of the transmission wheels 24 is determined by the usage situation to ensure that the nozzle 221 can rotate at least 180 degrees.

[0042] Even further, as Figure 4 shown, the flushing device 2 further includes a commutator 28. The commutator 28 is arranged on the spray gun rack 21. The first driving member 23 is in transmission connection with the input end of the commutator 28, and the transmission wheel 24 is in transmission connection with the output end of the commutator 28. The input end of the commutator 28 is perpendicular to the output end of the commutator 28. The commutator 28 can be used to change the direction of force transmission. When the first driving member 23 is indirectly connected to the transmission wheel 24 through the commutator 28, the axle of the transmission wheel 24 is perpendicular to the output axis of the first driving member 23. At this time, the axis of the worm 223 is also perpendicular to the output axis of the first driving member 23. With such a setting, the layout of the first driving member 23 and the worm 223 on the spray gun rack 21 is more compact, effectively reducing the volume of the flushing device 2.

[0043] Even further, as Figures 2 to 4As shown, the flushing device 2 further includes a butt joint pipe 26, which is arranged on the spray gun frame 21. The butt joint pipe 26 is hollow inside and is connected to the nozzle 221. The butt joint pipe 26 is used to connect with the water pipe that conveys the high-pressure water flow, and then deliver the high-pressure water flow to the nozzle 221. In this embodiment, a cavity is also provided in the spray gun frame 21, and the cavity of the butt joint pipe 26 is sequentially connected to the cavity of the spray gun frame 21 and the cavity of the nozzle 221. The spray gun frame 21 connects multiple nozzles 221, and then one butt joint pipe 26 connects the spray gun frame 21, so that one butt joint pipe 26 can provide high-pressure water flow to multiple nozzles 221 at the same time.

[0044] Furthermore, if Figure 2 As shown, the flushing device 2 also includes a threading tube 27, which is arranged on the spray gun frame 21. The wires or air pipes required for the device can be passed through the threading tube 27, and the threading tube 27 can protect the wires or air pipes. In this embodiment, two threading tubes 27 are provided, and the two threading tubes 27 are symmetrically arranged on both sides of the first driving member 23. The two threading tubes 27 can meet the use of wires or air pipes. It should be noted that not only can two threading tubes 27 be provided, but also more or less can be provided as needed.

[0045] Alternatively, if Figure 5 As shown, the walking support mechanism 11 also includes a second driving member 113, a first slider 114, two second sliders 115 and two connecting rods 116. The first slider 114 is slidably connected to the frame 111 along the second direction, and the two second sliders 115 are slidably connected to the frame 111 along the first direction. The second driving member 113 is arranged on the frame 111. The second driving member 113 is transmission-connected to the first slider 114 and is used to drive the first slider 114 to slide along the second direction. The two ends of the first slider 114 along the first direction are respectively hinged to one end of the two connecting rods 116, and the other ends of the two connecting rods 116 are respectively hinged to the middle parts of the two second sliders 115; two support members 112 are provided, and the two support members 112 are connected to the two second sliders 115 in a one-to-one correspondence. When the second slider 115 slides along the first direction, it drives the support member 112 to abut against or move away from the cleaning pipe. Specifically, in this embodiment, the second driving member 113 is used to drive the first slider 114 to slide along the second direction, and the first slider 114 can drive the two second sliders 115 to slide in opposite directions or towards each other along the first direction through the two connecting rods 116, and then the two second sliders 115 can move the two support members 112 in opposite directions or towards each other along the first direction. In this way, the two second sliders 115 can simultaneously approach or move away from the pipe to be cleaned, so that the two support members 112 can also simultaneously abut against the surface of the pipe to be cleaned or simultaneously move away from the pipe to be cleaned. In this embodiment, the second driving member 113 is specifically a cylinder. In other embodiments, the second driving member 113 can also be an electric push cylinder.

[0046] Further, the traveling device 1 further includes a guiding assembly 13. The guiding assembly 13 includes a guiding seat 131 and a guiding rod 132. The guiding seat 131 is fixedly arranged on the frame 111. The guiding rod 132 is slidably inserted through the guiding seat 131 and the axial direction of the guiding rod 132 extends along the first direction. The guiding rod 132 is connected to the second slider 115. When the second slider 115 moves along the first direction, the guiding rod 132 can play a guiding role, so that the second slider 115 can move smoothly when driving the support member 112, which is more conducive to the support member 112 abutting against the pipe to be cleaned. In this embodiment, along the second direction, two guiding assemblies 13 are arranged at both ends of the frame 111 respectively, and the two guiding assemblies 13 are connected to the two second sliders 115 in a one-to-one correspondence. Thus, the guiding assemblies 13 are connected to both ends of the second slider 115 along the second direction. When the second slider 115 moves along the first direction, both ends of the second slider 115 can be guided by the guiding assemblies 13, so as to achieve the purpose of smooth movement. In other embodiments, the number of the guiding assemblies 13 can be an even number greater than four and can be increased according to needs.

[0047] Optionally, as Figure 5 shown, the support member 112 has a wavy contact surface for abutting against or moving away from the pipe to be cleaned along the first direction. In this embodiment, the contact surface of the support member 112 is designed to be wavy, and the overall wavy structure can also be divided into a plurality of U-shaped structures. Such a setting makes the support member 112 abut against the surface of the pipe to be cleaned more stably, so that the traveling device 1 abuts against the pipe to be cleaned more stably, and makes the equipment work more reliably.

[0048] Optionally, as Figure 6As shown in the figure, the frames 111 of the two walking support mechanisms 11 are the first frame and the second frame respectively. The walking drive mechanism 12 includes a third driving member 121 and a third slider 122. The third slider 122 is slidably connected to the first frame and fixedly connected to the second frame. The third driving member 121 is disposed on the first frame. The third driving member 121 is drivingly connected to the third slider 122 and is used to drive the third slider 122 to slide in the second direction. Specifically, in this embodiment, the third driving member 121 is fixedly disposed on the first frame, then the third slider 122 is slidably connected to the first frame, and then the third slider 122 is fixedly connected to the second frame. In this way, the third driving member 121 and the second frame can slide relative to each other. When the walking support mechanism 11 corresponding to the first frame is in contact with the pipe to be cleaned, and the walking support mechanism 11 corresponding to the second frame is in a separated state from the pipe to be cleaned. By driving the third slider 122 to slide along the second direction by the third driving member 121, the walking support mechanism 11 corresponding to the second frame can be driven to slide relative to the other walking support mechanism 11. When the walking support mechanism 11 corresponding to the second frame is in contact with the pipe to be cleaned, and the walking support mechanism 11 corresponding to the first frame is in a separated state from the pipe to be cleaned, repeating the above operation can achieve the mutual alternating sliding of the two walking support mechanisms 11, thereby driving the device to move inside the steam generator. In this embodiment, the third driving member 121 is specifically a cylinder. In other embodiments, the third driving member 121 can also be an electric push cylinder.

[0049] Optionally, as Figures 2 to 4 shown, the flushing device 2 further includes a spray gun barrel 25, and the spray gun barrel 25 is communicated with the nozzle 221. In this embodiment, a spray gun barrel 25 can be installed at the nozzle opening of the nozzle 221. The spray gun barrel 25 can extend the shooting distance of the high-pressure water flow, and thus can shoot the high-pressure water flow to a position farther from the flushing device 2, improving the flushing efficiency of the dirt. In this embodiment, the spray gun barrel 25 is made of polyethylene or polyvinyl chloride. The spray gun barrel 25 made of this material is both corrosion-resistant and can be well adapted to the corrosive environment inside the steam generator; the spray gun barrel 25 made of this material also has a certain degree of softness and will not damage the pipe to be cleaned when the flushing device 2 moves in a narrow space.

[0050] The beneficial effects of the mobile flushing device provided in this embodiment are at least:

[0051] Inside the secondary side of the steam generator, there are at least two groups of heat transfer tube rows arranged symmetrically and at intervals. These heat transfer tube rows are the tube rows to be cleaned in this embodiment. The tube rows to be cleaned include a number of tubes to be cleaned arranged at intervals. The device is designed with a traveling device 1, and the traveling device 1 includes two traveling support mechanisms 11 and a traveling drive mechanism 12. The traveling support mechanism 11 includes two support members 112. The two support members 112 move away from or towards the tubes to be cleaned on both sides along the first direction, so that there are a contact state and a separated state between the traveling support mechanism 11 and the tubes to be cleaned. Then, the two traveling support mechanisms 11 are driven by the traveling drive mechanism connected and coordinated with the two traveling support mechanisms 11 to slide relatively along the second direction, so as to realize the movement of the traveling device 1 between the two groups of tube rows to be cleaned along the second direction. The device is also designed with a flushing device 2. The flushing device 2 includes a spray gun rack 21 and a spraying component 22. The flushing device 2 is connected to the traveling device 1 by connecting the spray gun rack 21 to any one of the two traveling support mechanisms 11. The traveling device 1 drives the flushing device 2 to move between the two groups of tube rows to be cleaned. The spraying component 22 includes a nozzle 221. The nozzle orifice of the nozzle 221 faces the tubes to be cleaned. High-pressure water flow is sprayed through the nozzle orifice of the nozzle 221 to flush the tubes to be cleaned and the side plates inside the secondary side. Moreover, the flushing device 2 can move inside the secondary side along with the traveling device 1, so as to flush the tubes to be cleaned and the side plates deeper inside the secondary side, and the efficiency of flushing dirt is higher.

[0052] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A mobile flushing device, characterized in that, Comprising: A traveling device (1), the traveling device (1) comprising two traveling support mechanisms (11) and a traveling drive mechanism (12), the traveling support mechanism (11) comprising a frame (111) and a support member (112) movably disposed on the frame (111), the frames (111) of the two traveling support mechanisms (11) being in sliding fit, the support member (112) having a contact state in which it abuts against the pipe to be cleaned in a first direction and a separation state in which it separates from the pipe to be cleaned in the first direction, the traveling drive mechanism (12) being configured to drive the two traveling support mechanisms (11) to slide relative to each other in a second direction, the first direction and the second direction being perpendicular to each other; A flushing device (2), the flushing device (2) comprising a spray gun holder (21) and a spraying assembly (22), the spraying assembly (22) comprising a nozzle (221), the spray gun holder (21) being connected to the frame (111) of one of the traveling support mechanisms (11), the nozzle (221) being configured to spray high-pressure water flow.

2. The mobile flushing device according to claim 1, wherein, The flushing device (2) further comprises a first driving member (23), the first driving member (23) being disposed on the spray gun holder (21) and being in transmission connection with the nozzle (221), the first driving member (23) being configured to drive the nozzle (221) to rotate.

3. The mobile flushing device according to claim 2, characterized in that, The spraying assembly (22) further comprises a worm gear (222) and a worm (223), the worm (223) being rotatably disposed on the spray gun holder (21), the first driving member (23) being in transmission connection with the worm (223), the first driving member (23) being configured to drive the worm (223) to rotate, the worm gear (222) being connected to the nozzle (221), the worm gear (222) meshing with the worm (223).

4. The mobile flushing device according to claim 3, characterized in that, The spraying assembly (22) comprises two nozzles (221) and two worm gears (222), the two nozzles (221) being spaced apart in the second direction, the two worm gears (222) being correspondingly connected to the two nozzles (221) one by one, the worm (223) meshing with the two worm gears (222) simultaneously.

5. A mobile flushing device according to claim 4, characterized in that, The number of the spraying assemblies (22) is even, the first driving member (23) being in transmission connection with the worm (223) of each spraying assembly (22), half of the spraying assemblies (22) being disposed on one side of the spray gun holder (21) in the first direction, and the other half of the spraying assemblies (22) being disposed on the other side of the spray gun holder (21) in the first direction.

6. The mobile flushing device according to claim 4, characterized in that, The flushing device (2) further comprises a plurality of transmission wheels (24) rotatably disposed on the spray gun holder (21), the plurality of transmission wheels (24) being sequentially meshed and sequentially disposed in the second direction, the transmission wheel (24) at one end in the second direction being in transmission connection with the first driving member (23), and the transmission wheel (24) at the other end in the second direction meshing with the worm (223).

7. A mobile flushing device according to claim 1, characterized in that, The walking support mechanism (11) further includes a second driving member (113), a first slider (114), two second sliders (115), and two connecting rods (116). The first slider (114) is slidably connected to the frame (111) along the second direction. The two second sliders (115) are slidably connected to the frame (111) along the first direction. The second driving member (113) is disposed on the frame (111). The second driving member (113) is in transmission connection with the first slider (114) and is used to drive the first slider (114) to slide along the second direction. The two ends of the first slider (114) along the first direction are respectively hinged to one ends of the two connecting rods (116). The other ends of the two connecting rods (116) are respectively hinged to the middle parts of the two second sliders (115). There are two support members (112). The two support members (112) are respectively connected to the two second sliders (115) in a one-to-one correspondence. When the second slider (115) slides along the first direction, it drives the support member (112) to abut against or move away from the cleaning pipe.

8. A mobile flushing device according to claim 1, characterized in that, The support member (112) has a wavy contact surface. The contact surface is used to abut against or move away from the pipe to be cleaned along the first direction.

9. A mobile flushing device according to claim 1, characterized in that, The frames (111) of the two walking support mechanisms (11) are respectively a first frame and a second frame. The walking driving mechanism (12) includes a third driving member (121) and a third slider (122). The third slider (122) is slidably connected to the first frame and is fixedly connected to the second frame. The third driving member (121) is disposed on the first frame. The third driving member (121) is in transmission connection with the third slider (122) and is used to drive the third slider (122) to slide along the second direction.

10. A mobile flushing device according to any one of claims 1-9, characterized in that, The flushing device (2) further includes a spray gun barrel (25). The spray gun barrel (25) is communicated with the nozzle (221).

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