Underwater dirt suction device for cleaning nuclear facility pool

Abstract

The invention relates to the technical field of nuclear power station maintenance, and provides an underwater sewage suction device for nuclear facility pool cleaning, comprising: a sewage suction device, the sewage suction device comprising a first sewage suction part, a second sewage suction part, a pump part, a shunting part, an inflow water pipe, an outflow water pipe and a filtering part; the inhaler comprises a suction main pipe and a suction inlet component, and the suction inlet component is configured to be tightly attached to the nuclear facility pool. The suction main pipe is connected with the second dirt suction component through an adapter; and the maximum horizontal cross section of the shunting part is larger than the sum of the maximum horizontal cross section of the first sewage suction part and the maximum horizontal cross section of the second sewage suction part. The suction device is connected to the dirt suction device, the two dirt suction openings are driven through the single pump, the dirt suction device is provided with the filtering part, filtering can be directly carried out, water does not need to be pumped to a special facility, then the water is cleaned through the filter, and the power efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear power plant maintenance, and particularly to an underwater sewage suction device for cleaning nuclear facility pools. Background Art

[0002] In the technical field of nuclear power plant maintenance, the cleaning work of nuclear facility pools plays a crucial role in ensuring the safe and stable operation of nuclear power plants. As key facilities of nuclear power plants, such as nuclear reactor pools and spent fuel pools, the cleanliness of their internal environments is directly related to the operation safety of nuclear reactors and the storage stability of nuclear fuels.

[0003] Currently, when cleaning nuclear facility pools, water in the pools is usually directly pumped to special facilities and then the water quality is cleaned through filters. However, this direct pumping method results in low treatment efficiency. In addition, current sewage suction devices are difficult to focus on cleaning areas with dense pollutants, resulting in prominent problems of stain residues at complex structures such as the bottom of the pool, the corners of the four walls, and spent fuel racks. Moreover, for the corners of the pool, due to the limitation of the shape of the sewage suction head, there are dead corners that are difficult to reach, and the position of the sewage suction head needs to be changed multiple times to clean, resulting in low efficiency. For the pool walls and bottom, due to the large area, directly sucking with the sewage suction head also has the problem of low efficiency.

[0004] In view of the above deficiencies of the prior art, it is urgent for those skilled in the art to design an underwater sewage suction device suitable for the complex environment of nuclear facility pools, especially for thoroughly cleaning the spent fuel racks in spent fuel pools, as well as the dirt on the bottom, four walls, and corners of the pools. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides an underwater sewage suction device for cleaning nuclear facility pools, including:

[0006] A sewage suction device, which includes a first sewage suction component, a second sewage suction component, a pump component, a shunt component, an inflow water pipe, an outflow water pipe, and a filtering component; one end of the pump component is communicated with the first sewage suction component, and the other end is communicated with the shunt component. The shunt component is communicated with the second sewage suction component through the inflow water pipe and the outflow water pipe, and the filtering component is communicated with the shunt component; the pump component provides power for the entire device and conveys sewage to the shunt component; the second sewage suction component is configured to suck sewage by forming a negative pressure inside; the filtering component is configured to remove impurities, suspended matters, and particles in the sewage conveyed by the second sewage suction component to the shunt component.

[0007] The maximum horizontal cross-section of the shunt component should be larger than the sum of the maximum horizontal cross-sections of the first sewage suction component and the second sewage suction component.

[0008] Preferably, the sewage suction device can also be used independently.

[0009] Furthermore, the pump component is a pump in pipe.

[0010] Furthermore, the first sewage suction component includes a dust suction box. The top and bottom surfaces of the dust suction box are steel plates, and the side surfaces of the dust suction box are all first mesh covers; an opening is provided on the steel plate of the top surface of the dust suction box and is communicated with the water inlet of the pump in pipe. Since the side surfaces of the first sewage suction component are first mesh covers, under the action of the pump in pipe, the four walls of the pool and the four walls of the spent fuel lattice can be cleaned.

[0011] The lengths of the inflow water pipe and the outflow water pipe can be determined according to the depth of the pool to be cleaned. The whole is in a long rod shape, with a compact structure, which is convenient for transporting the sewage suction device and suitable for use in narrow spaces.

[0012] Furthermore, the shunt component includes a shunt box and a second water outlet chamber. An inlet water chamber and a first water outlet chamber are provided in the shunt box, and the inlet water chamber is communicated with the water outlet of the pump in pipe; the second water outlet chamber is arranged above the shunt box and is communicated with the first water outlet chamber, and the second water outlet chamber or the first water outlet chamber is communicated with the filtering component. By providing the second water outlet chamber, the water flow can be made a little gentler, and the U-shaped connecting pipe of the filter can also be arranged at the middle position. If only the first water outlet chamber is provided, it is also possible, but the volume of the first water outlet chamber is required to be large. The second water outlet chamber and the first water outlet chamber are communicated by means of opening holes.

[0013] Furthermore, lifting lugs are provided on both sides of the shunt box, and the whole sewage suction device can be put into the pool to be cleaned through the lifting lugs.

[0014] Furthermore, the second sewage suction component includes a sewage suction box, and the sewage suction box includes a first sewage suction part, a second sewage suction part and a third sewage suction part;

[0015] The first sewage suction part is provided with a first inflow bin and an outflow bin; the second sewage suction part is provided with a second inflow bin, and a Venturi tube and a bent pipe head are arranged in the second inflow bin. One side of the Venturi tube is provided with an opening, and the bent pipe head is arranged in the Venturi tube. One end (inlet end) of the bent pipe head communicates with the second inflow bin through being embedded in the opening of the Venturi tube; one end of the inflow water pipe is communicated with the water inlet bin, and the other end is communicated with the first inflow bin; one end of the outflow water pipe is communicated with the first water outlet bin, and the other end is communicated with the outflow bin; preferably, at least one inflow water pipe and one outflow water pipe are provided. Preferably, the bottom of the water inlet bin is provided with an opening, and is communicated with the water outlet of the in-line pump and the inflow water pipe through the opening. The top of the first inflow bin is provided with an opening and is communicated with the inflow water pipe through the opening. The bottom of the first water outlet bin is also provided with an opening and is communicated with the outflow water pipe through the opening; the top of the outflow bin is provided with an opening and is communicated with the outflow water pipe through the opening.

[0016] Preferably, the bent pipe head includes an inlet end and a bent pipe head body. The inlet end of the bent pipe head is provided with an outer edge part, and the outer edge part is arranged on the outer wall of the inlet of the Venturi tube. The bent pipe head body is arranged inside the Venturi tube; the outflow bin is connected with the outlet of the Venturi tube; by using the Venturi tube, the water kinetic energy in the pipeline can be recovered, and the power consumption of the pump can be reduced.

[0017] The third sewage suction part is a cavity, and the third sewage suction part is communicated with the inlet of the Venturi tube. The bottom of the third sewage suction part is in an open state, and the third sewage suction part is connected with a adapter;

[0018] A second screen cover is arranged between the third sewage suction part and the inlet of the Venturi tube.

[0019] Preferably, connecting pieces are arranged on both sides of the third sewage suction part and are connected through a clamp for a camera or a clamp for a sewage suction pipeline. The camera can be installed on the clamp for the camera to observe the cleaning condition in the pool and is also more conducive to the grasping and releasing of foreign matters. Other sewage suction pipes are installed on the clamp for the sewage suction pipeline, and the other end of the sewage suction pipeline is connected with a sewage suction head, so that the sewage suction space range can be further expanded.

[0020] Furthermore, the filtering component includes a U-shaped connecting pipe and a filter, and the filter is communicated with the second water outlet bin through the U-shaped connecting pipe.

[0021] Preferably, before the in-line pump is started, the first sewage suction component, the second sewage suction component, the in-line pump, the flow splitting component and the inflow water pipe and the outflow water pipe should be filled with water.

[0022] Further, it further includes an inhaler, the inhaler includes an inhalation main pipe and an inhalation port component, the inhalation main pipe and the inhalation port component are connected; the inhalation port component is configured to be closely attached to the pool of the nuclear facility. The inhalation main pipe is of a hollow structure.

[0023] The inhalation main pipe is connected to the second sewage suction component through an adapter.

[0024] Further, the inhalation port component includes a positioning plate, a bent pipe and a first inhalation port. The positioning plate is square; a first through hole is provided in the central part of the positioning plate. The first inhalation port is welded in the four-corner area of the positioning plate. One port outer wall of the bent pipe is welded to the inner wall of the inhalation main pipe, and the other port passes through the first through hole and is welded to the first inhalation port; the inhalation area is enlarged through the first inhalation port.

[0025] The central axis of the first inhalation port is parallel to a diagonal of the positioning plate;

[0026] Second through holes are provided at the four corners of the positioning plate, and the second through holes are arranged outside the setting position of the first inhalation port; a hollow positioning pipe is provided on the positioning plate on the side close to the inhalation main pipe, and the positioning pipe is arranged at the second through hole.

[0027] Preferably, one port ends of multiple bent pipes are welded in a circumferential distribution inside the inhalation main pipe.

[0028] Further, a connecting body is welded between the first inhalation ports, and the connecting body is also welded to the positioning plate.

[0029] Further, a support leg is provided below the connecting body, and the support leg is a groove-shaped member with a groove structure.

[0030] Further, the inhalation port component includes an inhalation chamber, the inhalation chamber includes a diffusion section and a flow collection section, and a second inhalation port is provided in the flow collection section;

[0031] The flow collection section is rectangular, and rollers are provided on the flow collection section, and the rollers protrude from the horizontal plane where the flow collection section is located;

[0032] The horizontal plane where the rolling axis of the roller is located is parallel to the horizontal plane where the flow collection section is located. When the roller rolls along the pool wall, there is a gap between the inhalation chamber and the pool wall to ensure a smooth flow channel during water absorption. The inhaler sucks sewage while slowly rolling forward along the pool wall, and the bottom or wall of the pool is cleaned through round-trip operations.

[0033] The present invention has the following beneficial effects:

[0034] (1)The present invention connects an inhaler to the sewage suction device, drives two sewage suction ports with a single pump, and is equipped with a filtering component on the sewage suction device, which can directly filter without pumping water to a dedicated facility and then cleaning the water quality through a filter, thus improving the power efficiency;

[0035] (2)In the present invention, the first sewage suction component can closely adhere to the side of the square hole of the spent fuel lattice and the pool wall for dust suction. The suction port of the second sewage suction component faces downward and can closely adhere to the bottom of the pool, or the second sewage suction component is connected to the inhaler, and the corners of the pool can be directly cleaned through the first suction port, realizing a comprehensive cleaning treatment of the four walls and corners of the spent fuel lattice without the need to change positions multiple times, and the cleaning of the pool corners can be efficiently completed;

[0036] (3)The whole of the present invention is in a long rod shape, with a compact structure, which is convenient for the handling of the sewage suction device and suitable for use in narrow spaces. Also, since the sewage suction device is long enough, it can be lifted into the square hole of the lattice to clean the bottom of the lattice. This structure is particularly suitable for cleaning the spent fuel lattice;

[0037] (4)The present invention uses a pump-in-pipe as the drive, with the motor and the pump body integrated in the pipeline, occupying little space, without the need for air-cooled heat dissipation, and avoiding the fan energy consumption of traditional motors; eliminating the connecting components such as couplings and flanges required by traditional pumps, reducing mechanical friction and leakage losses during fluid transportation; also, due to the wrapping effect of the pipeline wall, it can effectively block the propagation of noise and improve the comfort of the working environment;

[0038] (5)The positioning pipe in the present invention is set as a hollow structure, reducing the resistance when the inhaler is lowered. Since it is arranged at the four corners of the positioning plate, it can closely fit with the side wall of the pool;

[0039] (6)The suction chamber in the present invention includes a diffuser section and a collector section, which is conducive to the convergence and suction of sewage; the rectangular design of the collector section is paired with rollers protruding from the horizontal plane and with the horizontal plane where the rolling shafts are located parallel to the horizontal plane where the collector section is located, facilitating the movement of the inhaler in the pool, reducing the movement resistance, and improving the cleaning efficiency. When the rollers roll along the pool wall, there is a gap between the suction chamber and the pool wall. The inhaler sucks sewage while slowly rolling forward along the pool wall. Through round-trip operations, the bottom or the wall of the pool can be cleaned, and a large area can be quickly cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is the overall structural schematic diagram of the sewage suction device in Embodiment 1.

[0041] Figure 2 is Figure 1 the sectional view of

[0042] Figure 3 is Figure 2 the enlarged view of part Ⅰ in

[0043] Figure 4 Schematic diagram of the external structure of the second dirt-absorbing component in Example 1.

[0044] Figure 5 yes Figure 2 Enlarged view of part II.

[0045] Figure 6 This is a schematic diagram of the state in which the third sewage suction part is installed with the camera through a connecting piece in Example 1.

[0046] Figure 7 This is a schematic diagram of the waste suction device used alone to clean the spent fuel grid in Example 1.

[0047] Figure 8 2 is a schematic plan view of the inhaler with an adapter in Example 2.

[0048] Figure 9 Schematic diagram of the structure of the inhaler with adapter in Example 2.

[0049] Figure 10 1 is a top view of the inhaler with an adapter in Example 2.

[0050] Figure 11 This is a schematic diagram of the connection between the connector and the support legs in Example 2.

[0051] Figure 12 1 is a schematic plan view of the inhaler with an adapter in Example 3.

[0052] Figure 13 It is a structural schematic diagram of the underwater sewage suction device in Example 4.

[0053] Figure 14 It is a structural schematic diagram of the underwater sewage suction device in Example 5. DETAILED DESCRIPTION

[0054] The technical solution of the present invention is further described in detail below in conjunction with specific embodiments, but this embodiment is not intended to limit the present invention. All similar structures and similar variations of the present invention should be included in the scope of protection of the present invention. The semicolons in the present invention represent the relationship of and, and the English letters in the present invention are case-sensitive.

[0055] Example 1

[0056] This embodiment provides a sewage suction device 10 .

[0057] like Figure 1 - Figure 2As shown, the sewage suction device 10 includes a first sewage suction component 1, a second sewage suction component 2, a pump component 3, a flow splitting component 4, an inflow water pipe 51, an outflow water pipe 52, and a filtering component 6. One end of the pump component 3 is communicated with the first sewage suction component 1, and the other end is communicated with the flow splitting component 4. The flow splitting component 4 is communicated with the second sewage suction component 2 through the inflow water pipe 51 and the outflow water pipe 52. The filtering component 6 is communicated with the flow splitting component 4. The pump component 3 is configured to provide power for the whole device and transport sewage to the flow splitting component 4. The second sewage suction component 2 is configured to suck sewage by forming a negative pressure inside. The filtering component 6 is configured to remove impurities, suspended matters, and particles in the sewage transported from the second sewage suction component 2 to the flow splitting component. The maximum horizontal cross-section of the flow splitting component should be greater than the sum of the maximum horizontal cross-sections of the first sewage suction component and the second sewage suction component.

[0058] Among them, the pump component 3 is a pump in pipe. By using a pump in pipe (the motor and impeller are arranged inside the pipe), the connecting components such as couplings and flanges required by traditional pumps are omitted, reducing mechanical friction. The moving motor rotor and impeller are wrapped by the pipe and immersed in water, reducing noise. Water cooling avoids the energy consumption of the fan of traditional motors. Therefore, the energy efficiency is higher than that of traditional pumps, and the long-term operation of the sewage suction device can reduce the energy consumption cost; the noise is also greatly reduced, improving the working environment.

[0059] Preferably, the interval between the first sewage suction component 1 and the second sewage suction component 2 can be set according to requirements for simultaneous sewage suction at different spatial positions. In addition, the first sewage suction component 1 and the second sewage suction component 2 are driven by a single pump, but it is not required that the two sewage suction components are symmetrical. Therefore, the problem of local pressure fluctuation, increased energy consumption, and aggravated equipment wear caused by the asymmetry of the two sewage suction components will not occur.

[0060] Preferably, the materials of the inflow water pipe 51 and the outflow water pipe 52 are austenitic stainless steel.

[0061] Among them, the first sewage suction component 1 includes a dust suction box. The top and bottom surfaces of the dust suction box are steel plates, and the side surfaces of the dust suction box are all first mesh covers 11. An opening is provided on the steel plate of the top surface of the dust suction box and is communicated with the water inlet of the in-pipe pump. Since the side surface of the first sewage suction component 1 is the first mesh cover 11, under the action of the in-pipe pump, the four walls of the pool and the four walls of the spent fuel lattice 7 can be cleaned. Preferably, the aperture of the first mesh cover 11 is 6 mm, which can prevent foreign objects from entering the sewage suction device and can suck the dust outside the first mesh cover 11. Even large particles of 3 mm - 6 mm can be sucked in. The inflow water pipe 51 and the outflow water pipe 52 are welded at the four corners of the dust suction box, and the dust suction box is placed between the inflow water pipe 51 and the outflow water pipe 52. The lengths of the inflow water pipe and the outflow water pipe can be determined according to the depth of the pool to be cleaned. It makes the whole in a long rod shape, with a compact structure, convenient for the sewage suction device to carry, and suitable for use in narrow spaces.

[0062] As Figure 3 shown, the flow splitting component 4 includes a flow splitting box 41. An inlet chamber 411 and a first outlet chamber 412 are provided in the flow splitting box 41, and the inlet chamber 411 is communicated with the water outlet of the in-pipe pump. The flow splitting component 4 further includes a second outlet chamber 42. The second outlet chamber 42 is arranged above the flow splitting box 41 and is communicated with the first outlet chamber 412. The second outlet chamber 42 or the first outlet chamber 412 is communicated with the filtering component 6. By setting the second outlet chamber 42, the water flow can be made a little gentler, and the U-shaped connecting pipe of the filter can also be arranged at the middle position. If only the first outlet chamber is provided, it is also okay, but it is required that the body of the first outlet chamber be large. The second outlet chamber and the first outlet chamber are communicated by means of opening holes. Suspension lugs 410 are provided on both sides of the flow splitting box 41, and the whole sewage suction device can be put into the pool to be cleaned through the suspension lugs 410.

[0063] As Figure 4 - Figure 5 shown, the second sewage suction component 2 includes a sewage suction box, and the sewage suction box includes a first sewage suction part 21, a second sewage suction part 22 and a third sewage suction part 23;

[0064] A first inflow chamber 211 and an outflow chamber 212 are provided in the first sewage suction part 21. A second inflow chamber 221 is provided in the second sewage suction part 22. A Venturi tube 222 and an elbow head 223 are provided in the second inflow chamber 221. An opening is provided on one side of the Venturi tube 222, and the elbow head 223 is arranged in the Venturi tube 222. One end (inlet end) of the elbow head 223 is communicated with the second inflow chamber 221 through the opening embedded in the Venturi tube 222;

[0065] The third sewage suction part 23 is a cavity, which is connected to the inlet of the Venturi tube 222. The bottom of the third sewage suction part 23 is in an open state and is directly connected to the outside; that is, an opening is provided at the bottom of the third sewage suction part 23, and the outside can communicate with the inside of the cavity through this opening;

[0066] The first inflow bin 211 is connected to the second inflow bin 221. The second inflow bin 221 includes a first inflow part 2211 and a second inflow part 2212. The first inflow part 2211 is cylindrical, the second inflow part 2212 is frustum-shaped, and the height of the Venturi tube 222 is the same as the height of the second inflow part 2212;

[0067] Preferably, the elbow head 223 includes an inlet end 2231 and an elbow head body 2232. An outer edge part 2233 is provided at the inlet end of the elbow head. The outer edge part 2233 is arranged on the outer wall of the inlet of the Venturi tube 222, and the elbow head body 2232 is arranged inside the Venturi tube 222; the outflow bin 212 is connected to the outlet of the Venturi tube 222;

[0068] The Venturi tube 222 includes an inlet section 2221, a contraction section 2221, a throat 2223, and a diffusion section 2224. The cone angle of the contraction section 2221 is 21°±2°, and the cone angle of the diffusion section 2224 is between 5° and 15°.

[0069] By using the Venturi tube 222, the water kinetic energy in the pipeline can be recovered, and the power consumption of the pump can be reduced.

[0070] Wherein, a second mesh cover 8 is provided between the third sewage suction part 23 and the inlet of the Venturi tube 222. The aperture of the second mesh cover 8 is 6 mm to prevent foreign objects from entering the sewage suction device. The second mesh cover 8 and the third sewage suction part 23 form a foreign object suction cavity. When encountering foreign objects, such as nuts, the nuts can be adsorbed on the outside of the second mesh cover and gathered in the third sewage suction part 23. Since the foreign objects sucked are all in the third sewage suction part 23, the influence of water flow on the foreign objects can be reduced, preventing other things from directly touching the foreign objects and reducing the probability of foreign objects falling during movement. When the whole is moved to the upper opening of the underwater collection container, the pump in the pipe stops running and the adsorption force disappears, and the foreign objects fall into the collection container.

[0071] One end of the inflow water pipe 51 communicates with the water inlet chamber 411, and the other end communicates with the first inflow chamber 211; one end of the outflow water pipe 52 communicates with the first water outlet chamber 412, and the other end communicates with the outflow chamber 212; at least one inflow water pipe 51 and outflow water pipe 52 are provided. Preferably, an opening is provided at the bottom of the water inlet chamber 411, and it communicates with the water outlet of the in-pipe pump and the inflow water pipe 51 in an opening mode. An opening is provided at the top of the first inflow chamber 211, and it communicates with the inflow water pipe 51 in an opening mode. An opening is also provided at the bottom of the first water outlet chamber 412, and it communicates with the outflow water pipe 52 in an opening mode; an opening is provided at the top of the outflow chamber 212, and it communicates with the outflow water pipe 52 in an opening mode.

[0072] Wherein, the filtering component 6 includes a U-shaped connecting pipe 61 and a filter 62, and the filter communicates with the second water outlet chamber 42 through the U-shaped connecting pipe 61 and a flange. The filtering grade of the filter 62 can be selected in the range of 0.1 to 6 microns according to the actual situation.

[0073] As Figure 6 As shown, connecting pieces 231 can be provided on both sides of the third sewage suction part 23, and they are connected through a camera clamp 9 or a clamp of the sewage suction pipeline. The camera 91 is installed on the camera clamp 9, and the cleaning condition in the pool can be observed, and it is also easier to grab and release foreign objects. Other sewage suction pipes are installed on the clamps of the sewage suction pipeline, and the other end of the sewage suction pipeline is connected to the sewage suction head, which can further expand the space range of sewage suction. The third sewage suction part 23 can also be connected to a adapter (female adapter) for connecting to an inhaler.

[0074] In order to facilitate the cleaning of the spent fuel lattice, the maximum horizontal cross-section of the diversion box is slightly smaller than the cross-section of the spent fuel lattice, and the whole device can be put into the spent fuel lattice for cleaning. During use, the sewage suction device can be lifted into the square hole of the lattice through a lifting lug. Since the sewage suction device is long enough, the second sewage suction component can contact the bottom of the lattice. After the sewage suction device touches the bottom, the in-pipe pump can be started to suck away the dust at the bottom, and the first sewage suction component can closely adhere to the side of the square hole of the lattice for dust suction.

[0075] As Figure 7 As shown, when using the sewage suction device 10 in the present invention to clean the spent fuel lattice 7 alone, the specific process is as follows:

[0076] First, use a crane to lift the suction device by its lifting lug 410. First, hoist it to a rough position, and then manually adjust the position to lift the suction device into the square hole of the spent fuel grid 7. Before starting the in-pipe pump, the first suction component 1, the second suction component 2, the in-pipe pump, the shunt component 4, the inflow water pipe 51, and the outflow water pipe 52 should be filled with water. When the suction device touches the bottom, start the in-pipe pump. The first mesh cover 11 of the first suction component 1 closely adheres to the side of the square hole of the grid. Under the action of the pump, dust is sucked from the side wall of the square hole of the spent fuel grid. The water pumped by the pump enters the water inlet chamber 411 of the shunt box, the first inflow chamber 211 and the second inflow chamber 221 flowing in through the inflow water pipe 51, and then enters the Venturi tube 222 through the elbow head 223. When the water flows through the Venturi tube 222, a negative pressure is formed below the Venturi tube 222 (the third suction part). Under the block of the second mesh cover 8, objects are sucked into the third suction part 23; then it flows into the outflow chamber 212 through the outlet of the Venturi tube, and then flows into the first water outlet chamber 412, the second water outlet chamber 42, and the filter 62 in sequence through the outflow water pipe 52. The filter 62 filters the sewage and discharges the treated water. When it is completed, when the whole is moved to the upper opening of the underwater collection container, the in-pipe pump stops and the adsorption force disappears, and foreign objects fall into the collection container, thus completing the sewage suction and cleaning the pool. In addition, by installing a camera clamp on the connecting parts on both sides of the third suction part 23, installing the camera on the camera clamp, observing the cleaning situation in the pool, and it is also easier to grab and release foreign objects. Or install other sewage suction pipe clamps on the connecting parts on both sides of the third suction part, install other sewage suction pipes on the sewage suction pipe clamps, and the other end of the sewage suction pipe is connected to the sewage suction head to further expand the space range of sewage suction.

[0077] The present invention adopts a double-port sewage suction structure driven by a single pump. The first suction component 1 is connected to the water inlet of the in-pipe pump, and the purpose of sewage suction is achieved by directly pumping water through the in-pipe pump; for the second suction component 2, the water pumped by the in-pipe pump passes through the water inlet chamber 411 of the shunt box, then through the inflow water pipe 51, enters the first inflow chamber 211 and the second inflow chamber 221, and then through the elbow head 223, flows into the Venturi tube 222. A negative pressure is formed at the bottom of the Venturi tube 222, and the purpose of sewage suction is achieved through negative pressure adsorption. Then, from the Venturi tube 222, through the outflow chamber 212 and the outflow water pipe 52, it enters the first water outlet chamber 412 and the second water outlet chamber 42 of the shunt box, and then to the filter 62 to separate dust, and the clean water flows out of the filter to achieve decontamination. If a double sewage suction port is directly set at the pump inlet, local pressure fluctuations will occur due to asymmetric structure, increasing energy consumption and exacerbating equipment wear. This structure will not have pressure fluctuation situations, and the two sewage suction ports do not need to be symmetrically arranged, reducing energy consumption and wear.

[0078] Embodiment 2

[0079] This embodiment provides an inhaler, more specifically a corner inhaler, for cleaning the corners of a pool.

[0080] As Figure 8 - Figure 10 shown, the inhaler 20 includes an inhalation main pipe 2-11 and an inhalation port component 2-12. The inhalation main pipe 2-11 and the inhalation port component 2-12 are connected, and the inhalation port component 2-12 is configured to be closely attached to the nuclear facility pool. Among them, the dirt suction device is a device for removing solid pollutants, impurities, etc. in liquids or semi-fluids, which is an existing device and not the focus of protection of this solution, so no further description will be given. Among them, the inhalation main pipe 2-11 is a hollow structure.

[0081] As Figure 9 - Figure 10 shown, the inhalation port component 2-12 includes a positioning plate 2-121, a bent pipe 2-122, and a first inhalation port 2-123. The positioning plate 2-121 is square; a first through hole 2-1211 is provided in the central part of the positioning plate 2-121. The first inhalation port 2-123 is welded to the four corner areas of the positioning plate 2-121. One port outer wall of the bent pipe 2-122 is welded to the inner wall of the inhalation main pipe 2-11, and the other port passes through the first through hole 2-1211 and is welded to the first inhalation port 2-123; the inhalation area is enlarged through the first inhalation port 2-123.

[0082] Preferably, one port ends of multiple bent pipes 2-122 are circumferentially distributed and welded inside the inhalation main pipe 2-11.

[0083] When cleaning the corners, only need to place the inhaler 20 at the corners, without changing the position, and the cleaning of the pool corners can be efficiently completed.

[0084] Four corners of the positioning plate 2-121 are provided with second through holes 2-1212, and the second through holes 2-1212 are arranged outside the setting positions of the first suction openings 2-123; a hollow positioning tube 2-13 is provided on the positioning plate 2-121 on the side close to the suction main pipe 2-11, and the positioning tube 2-13 is arranged at the second through holes 2-1212. The positioning tube 2-13 is set as a hollow structure to reduce the resistance when the inhaler is lowered. Since it is arranged at the four corners of the positioning plate, it can be closely attached to the side wall of the pool, facilitating the overall placement of the inhaler into the pool. Since the positioning tube 2-13 is arranged at the four corners of the positioning plate, the outer wall of the positioning tube 2-13 can be closely attached to the pool wall at the corner of the pool, enabling better cleaning of the corner. The central axis of the first suction opening 2-123 is parallel to a diagonal of the positioning plate 2-121. A connecting body 2-14 is welded between the first suction openings 2-123 to increase the rigidity between the first suction openings 2-123; the connecting body 2-14 is also welded to the positioning plate 2-121. The connecting body 2-14 is a hollow structure to reduce the weight of the overall structure. As Figure 11 shown, a support leg 2-15 is provided below the connecting body 2-14. The support leg 2-15 is a grooved member with a groove structure. On the one hand, it reduces the overall weight, and on the other hand, it leaves a larger flow channel below the connecting body 2-14, facilitating the suction of water and pollutants and completing the cleaning of this area faster.

[0085] Since the positioning plate 2-121 is square, two sides of the positioning plate 2-121 are closely attached to two sides of the pool, and the support legs 2-15 of the inhaler are in contact with the bottom of the pool. At this time, the inhaler is closely attached to three sides of the pool, and the first suction openings 2-123 are facing the corners of the pool, and the cleaning of the corners at this position can be completed.

[0086] This inhaler is particularly suitable for cleaning the bottom corners of the spent fuel lattice 7 in the spent fuel pool. The size of the positioning plate 2-121 is set to be slightly smaller than the square hole of the spent fuel lattice 7. The inhaler is inserted into the bottom of the square hole of the spent fuel lattice 7, and the four first suction openings 2-123 of the inhaler are aligned with the four corners of the square hole, enabling faster and better cleaning of the bottom corners of the square hole.

[0087] Embodiment 3

[0088] This embodiment provides an inhaler, more specifically a surface inhaler, for cleaning the wall surface and bottom surface of the pool.

[0089] As Figure 12As shown, the inhaler 20 includes an inhalation main pipe 2-11 and an inhalation port component 2-12b. The inhalation main pipe 2-11 is connected to the inhalation port component 2-12b, and the inhalation port component 2-12b is configured to be closely attached to the nuclear facility pool. Among them, the dirt suction device is a device for removing solid pollutants, impurities, etc. in liquids or semi-fluids. It is an existing device and not the focus of protection of this solution, so it will not be further described. The letter b represents the second structure of the inhalation port component in the present invention. Among them, the inhalation main pipe 2-11 is a hollow structure.

[0090] Among them, the inhalation port component 2-12b includes an inhalation chamber. The inhalation chamber includes a diffusion section 2-21 and a current collection section 2-22. The current collection section 2-22 is provided with a second inhalation port. The current collection section 2-22 is rectangular, and the current collection section 2-22 is provided with rollers 2-23. The rollers 2-23 protrude from the horizontal plane where the current collection section 2-22 is located. The horizontal plane where the rolling axis of the rollers 2-23 is located is parallel to the horizontal plane where the current collection section 2-22 is located. When the rollers 2-23 roll along the pool wall, there is a gap between the inhalation chamber and the pool wall to ensure a smooth flow channel during water suction. The inhaler sucks dirt while slowly rolling forward along the pool wall, and the bottom or wall of the pool is cleaned through round-trip operations.

[0091] Embodiment 4

[0092] As Figure 13 shown, this embodiment provides an underwater dirt suction device for cleaning a nuclear facility pool, which includes the dirt suction device in Embodiment 1 and the inhaler in Embodiment 2. The inhalation main pipe is connected to the second dirt suction component through an adapter 2-4. Among them, the third dirt suction part 23 of the dirt suction device is connected to the female adapter, and the inhalation main pipe is connected to the male adapter.

[0093] When cleaning the spent fuel grid 7 with the underwater dirt suction device in this embodiment, the specific process is as follows:

[0094] First, connect the suction main pipe and the second sewage suction component through the adapter 2-4. Then, use a crane to lift the lifting lug 410 of the sewage suction device, first hoist it to a rough position, and then adjust the position manually to lift the sewage suction device into the square hole of the spent fuel grid 7. Since the positioning plate 2-121 is square, both sides of the positioning plate 2-121 are closely attached to both sides of the pool, and the feet 2-15 of the suction device contact the bottom of the pool. At this time, the suction device is closely attached to three sides of the pool, and the first suction port 2-123 is facing the corner of the spent fuel grid. Before the in-pipe pump is started, the first sewage suction component 1, the second sewage suction component 2, the in-pipe pump, the flow splitting component 4, the inflow water pipe 51, the outflow water pipe 52, the suction main pipe, and the elbow pipe should be filled with water. When the suction device touches the bottom, start the in-pipe pump. The first mesh cover 11 of the first sewage suction component 1 is closely attached to the side of the grid square hole. Under the action of the pump, dust the side wall of the spent fuel grid square hole. The water pumped by the pump enters the water inlet chamber 411 of the flow splitting box, the first inflow chamber 211 and the second inflow chamber 221 flowing in through the inflow water pipe 51, and then enters the Venturi tube 222 through the elbow head 223. When the water flows through the Venturi tube 222, a negative pressure is formed below the Venturi tube 222 (the third sewage suction part). Under the action of this negative pressure, the first suction port 2-123 of the suction device sucks the dust at the corner of the spent fuel grid into the third sewage suction part 23 through the elbow pipe and the suction main pipe. Also, due to the blocking of the second mesh cover 8, objects are blocked in the third sewage suction part 23. Then, it flows into the outflow chamber 212 through the outlet of the Venturi tube, and then flows into the first water outlet chamber 412, the second water outlet chamber 42, and the filter 62 in sequence through the outflow water pipe 52. The filter 62 filters the sewage and discharges the treated water, thus completing the sewage suction and cleaning the pool.

[0095] Embodiment 5

[0096] As Figure 14 shown, this embodiment provides an underwater sewage suction device for cleaning the pool of nuclear facilities, including the sewage suction device in Embodiment 1 and the suction device in Embodiment 3. The suction main pipe is connected to the second sewage suction component through the adapter 2-4. Among them, the third sewage suction part 23 of the sewage suction device is connected to the female adapter, and the suction main pipe is connected to the male adapter.

[0097] When cleaning the wall and bottom of the pool with the underwater sewage suction device in this embodiment, the specific process is as follows:

[0098] First, connect the main suction pipe to the second sewage suction component through the adapter 2-4. Then, use a crane to lift the lifting lug 410 of the sewage suction device, and first hoist it into the pool. Place the rollers against the pool wall or the bottom of the pool. Before the pipe pump starts, the first sewage suction component 1, the second sewage suction component 2, the pipe pump, the flow splitting component 4, the inflow water pipe 51, the outflow water pipe 52, the main suction pipe, and the elbow pipe should be filled with water. When the suction device touches the bottom, start the pipe pump. The first mesh cover 11 of the first sewage suction component 1 closely adheres to the side of the square hole of the grid. Under the action of the pump, dust the side wall of the square hole of the spent fuel grid. The water pumped by the pump enters the water inlet chamber 411 of the flow splitting box, the first inflow chamber 211 and the second inflow chamber 221 flowing in through the inflow water pipe 51, and then enters the Venturi tube 222 through the elbow head 223. When the water flows through the Venturi tube 222, a negative pressure is formed below the Venturi tube 222 (the third sewage suction part). Under the action of this negative pressure, the second suction port 123 of the suction device sucks the dust on the pool wall or the bottom of the pool into the third sewage suction part 23 through the elbow pipe and the main suction pipe, and then flows into the outflow chamber 212 through the outlet of the Venturi tube, and then flows into the first water outlet chamber 412, the second water outlet chamber 42, and the filter 62 in sequence through the outflow water pipe 52. The filter 62 filters the sewage and discharges the treated water, thus completing the sewage suction and cleaning the pool. When the crane drags the sewage suction device to move, there is a gap between the suction chamber and the pool wall when the rollers roll against the pool wall, ensuring a smooth flow channel during water suction. The suction device sucks sewage while slowly rolling forward along the pool wall, and realizes the cleaning of the pool bottom or the pool wall through round-trip operations.

[0099] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

Claims

1. An underwater sewage suction device for cleaning the pool of a nuclear facility, characterized in that, Comprising: A sewage suction device, which includes a first sewage suction component, a second sewage suction component, a pump component, a flow splitting component, an inflow water pipe, an outflow water pipe, and a filtering component; one end of the pump component is communicated with the first sewage suction component, and the other end is communicated with the flow splitting component. The flow splitting component is communicated with the second sewage suction component through the inflow water pipe and the outflow water pipe, and the filtering component is communicated with the flow splitting component; The maximum horizontal cross-section of the flow splitting component should be larger than the sum of the maximum horizontal cross-sections of the first sewage suction component and the second sewage suction component.

2. The underwater sewage suction device for cleaning the nuclear facility pool according to claim 1, characterized in that, The pump component is a pump in pipe.

3. The underwater sewage suction device for cleaning the pool of nuclear facilities according to claim 2, characterized in that, The first sewage suction component includes a dust suction box. The top surface and the bottom surface of the dust suction box are both steel plates, and the side surfaces of the dust suction box are all first mesh covers; there is an opening on the steel plate of the top surface of the dust suction box and it is communicated with the water inlet of the pump in pipe.

4. The underwater sewage suction device for cleaning the pool of nuclear facilities according to claim 2, characterized in that, The flow splitting component includes a flow splitting box and a second water outlet chamber. An inlet water chamber and a first water outlet chamber are arranged in the flow splitting box. The inlet water chamber is communicated with the water outlet of the pump in pipe; the second water outlet chamber is arranged above the flow splitting box and is communicated with the first water outlet chamber, and the second water outlet chamber or the first water outlet chamber is communicated with the filtering component.

5. The underwater sewage suction device for cleaning the pool of nuclear facilities according to claim 4, characterized in that, Lifting lugs are arranged on both sides of the flow splitting box.

6. The underwater sewage suction device for cleaning a nuclear facility pool according to claim 4, characterized in that, The second sewage suction component includes a sewage suction box, and the sewage suction box includes a first sewage suction part, a second sewage suction part, and a third sewage suction part; A first inflow chamber and an outflow chamber are arranged in the first sewage suction part; a second inflow chamber is arranged in the second sewage suction part. A Venturi tube and a bent pipe head are arranged in the second inflow chamber. There is an opening on one side of the Venturi tube, and the bent pipe head is arranged in the Venturi tube. One end of the bent pipe head communicates with the second inflow chamber through the opening embedded in the Venturi tube; one end of the inflow water pipe is communicated with the inlet water chamber, and the other end is communicated with the first inflow chamber; one end of the outflow water pipe is communicated with the first water outlet chamber, and the other end is communicated with the outflow chamber; The third sewage suction part is a cavity, and the third sewage suction part is communicated with the inlet of the Venturi tube. The bottom of the third sewage suction part is in an open state and is connected with a swivel joint; A second mesh cover is arranged between the third sewage suction part and the inlet of the Venturi tube.

7. An underwater sewage suction device for cleaning a nuclear facility pool according to claim 4, characterized in that, The filtering component includes a U-shaped connecting pipe and a filter, and the filter is communicated with the second water outlet chamber through the U-shaped connecting pipe.

8. The underwater sewage suction device for cleaning the pool of nuclear facilities according to claim 1, characterized in that, It also includes an inhaler, which includes an inhalation main pipe and an inhaler inlet component, and the inhalation main pipe and the inhaler inlet component are connected; The inhalation main pipe is connected with the second sewage suction component through a swivel joint.

9. The underwater sewage suction device for cleaning the pool of nuclear facilities according to claim 8, characterized in that, The inhaler inlet component includes a positioning plate, a bent pipe, and a first inhaler inlet. The positioning plate is square; a first through hole is arranged at the center of the positioning plate, and the first inhaler inlet is welded at the four corner areas of the positioning plate. One port outer side wall of the bent pipe is welded with the inner wall of the inhalation main pipe, and the other port passes through the first through hole and is welded with the first inhaler inlet; The central axis of the first inhaler inlet is parallel to a diagonal line of the positioning plate; Second through holes are arranged at the four corners of the positioning plate, and the second through holes are arranged outside the setting position of the first inhaler inlet; a hollow positioning tube is arranged on the positioning plate near the inhalation main pipe side, and the positioning tube is arranged at the second through hole.

10. The underwater sewage suction device for cleaning the pool of a nuclear facility according to claim 9, characterized in that, A connecting body is welded between the first suction inlets, and the connecting body is also welded to the positioning plate.

11. An underwater sewage suction device for cleaning a nuclear facility pool according to claim 10, characterized in that, Support feet are arranged below the connecting body, and the support feet are groove-shaped members with a groove structure.

12. An underwater sewage suction device for cleaning a nuclear facility pool according to claim 8, characterized in that, The suction inlet component includes a suction chamber, the suction chamber includes a diffusion section and a current collection section, and a second suction inlet is provided in the current collection section; The current collection section is rectangular, and rollers are arranged on the current collection section, and the rollers protrude from the horizontal plane where the current collection section is located; The horizontal plane where the rolling shaft of the roller is located is parallel to the horizontal plane where the current collection section is located.

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