CN111916242A - Seawater filtering device for nuclear power station - Google Patents
Seawater filtering device for nuclear power station Download PDFInfo
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- CN111916242A CN111916242A CN201910380304.8A CN201910380304A CN111916242A CN 111916242 A CN111916242 A CN 111916242A CN 201910380304 A CN201910380304 A CN 201910380304A CN 111916242 A CN111916242 A CN 111916242A
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- filtering device
- seawater filtering
- nuclear power
- seawater
- net frame
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D1/00—Details of nuclear power plant
- G21D1/003—Nuclear facilities decommissioning arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/15—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces
- B01D33/155—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces the filtering surface being parallel to the rotation axis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/333—Filters with filtering elements which move during the filtering operation with individual filtering elements moving along a closed path
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/44—Regenerating the filter material in the filter
- B01D33/48—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D33/50—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
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- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Organic Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Hydrology & Water Resources (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention discloses a seawater filtering device for a nuclear power station, which comprises: the spindle system comprises a spindle main body arranged on two bearing seats, a fixed end positioned at one end of the spindle main body and a sliding end opposite to the fixed end, wherein hubs are respectively arranged on the inner sides of the fixed end and the sliding end, and key grooves are arranged on the hubs; the framework system comprises a framework structure and a screen frame, wherein the framework structure comprises a plurality of trapezoid framework units arranged on a hub, each trapezoid framework unit is provided with a cross beam, two rim angle steels, a supporting ring beam, two spokes and a spoke support, the two spokes form a trapezoid structure, the top of the trapezoid structure is supported on the cross beam, the bottom of the trapezoid structure is arranged on the hub, and the two rim angle steels and the middle supporting ring beam are connected into 3 circumferences to form a stable framework structure; and a driving system for driving the seawater filtering device for the nuclear power station to rotate at a low speed, a medium speed and a high speed.
Description
Technical Field
The invention relates to a circulating water filtering system for a nuclear power station, in particular to a seawater filtering device for the nuclear power station.
Background
In recent years, during the operation of nuclear power plants, abnormal shutdown and shutdown of nuclear power units caused by floaters and marine organism blockage occur frequently, and the events are highly valued by nuclear safety supervision and energy management departments. Therefore, a series of studies are carried out on each relevant unit, and the preliminary analysis considers that: sudden invasion of a large amount of marine organisms and artificial dirt can cause the front and back pressure difference of the filtering device to rise rapidly, and the circulating pump trips, so that the load is reduced or the pile is stopped.
According to the difference of structure and working principle, the filtering device can be divided into an 'external-in internal-out' type filtering device and an 'internal-in external-out' type filtering device: the filtering device with the external inlet and the internal outlet enters water from the outside of the net and exits water from the inside of the net in the operation process, and garbage such as marine life and the like is intercepted at the outer side of the filtering device; the filtering device of the 'inside-in and outside-out' type is used for intercepting garbage such as water entering from the net, water exiting from the net, marine life and the like in the operation process. Through the comparative analysis of the capacity of resisting the invasion of marine organisms of two types of filtering devices of ' outside-in-outside-out ' and ' inside-in-outside-out ' of a domestic and outside-transported nuclear power plant and the experience feedback of the operation of the nuclear power plant, the filtering device of the ' outside-in-outside-out ' type is obviously superior to the filtering device of the ' inside-in-out ' type in the aspect of the anti-impact load capacity, and the response time of operators of the power plant is longer than that of the filtering device of the ' inside-in-out.
At present, a related filtering device with an external inlet and an internal outlet adopts a double-A structure, the double-A structure is complex, in addition, in order to ensure that each net sheet can be washed, a back flushing water pipe must be divided into three sections, a middle section water pipe needs to pass through a main shaft, the main shaft needs to adopt a hollow main shaft, the domestic mature manufacturing process of the main shaft is a solid main shaft, and the hollow main shaft has the risks of difficult manufacturing and processing and high cost
In addition, the maintenance platform used for maintaining the backwashing water pipe in the filtering device takes root on the main shaft, other extra supports are not provided, and the anti-seismic performance of the maintenance platform is poor.
In view of the above, there is a need to provide a new seawater filtering device for nuclear power plant to overcome the drawbacks of the related art.
Disclosure of Invention
The invention aims to: overcomes the defects of the prior art and provides a novel seawater filtering device for a nuclear power station.
In order to achieve the above object, the present invention provides a seawater filtering apparatus for a nuclear power plant, comprising:
the spindle system comprises a spindle main body arranged on two bearing seats, a fixed end positioned at one end of the spindle main body and a sliding end opposite to the fixed end, wherein hubs are respectively arranged on the inner sides of the fixed end and the sliding end, and key grooves are arranged on the hubs;
the framework system comprises a framework structure and a screen frame, wherein the framework structure comprises a plurality of trapezoid framework units arranged on a hub, each trapezoid framework unit is provided with a cross beam, two rim angle steels, a supporting ring beam, two spokes and a spoke support, the two spokes form a trapezoid structure, the top of the trapezoid structure is supported on the cross beam, the bottom of the trapezoid structure is arranged on the hub, and the two rim angle steels and the middle supporting ring beam are connected into 3 circumferences to form a stable framework structure;
and the driving system drives the seawater filtering device to rotate at low speed, medium speed and high speed.
As an improvement of the seawater filtering device for the nuclear power station, a main shaft bearing seat is arranged on a base plate, a limiting guide block is arranged between the bearing seat and the base plate, a limiting pull rod and a protective pull rod are arranged above a main shaft body, the protective pull rod is disconnected when the seawater filtering device is subjected to larger buoyancy, the bearing seat is separated from the base plate, the seawater filtering device floats upwards along the limiting guide block, and the seawater filtering device is limited at a safe position by the limiting pull rod after the seawater filtering device floats to a certain safe position.
As an improvement of the seawater filtering device for the nuclear power station, in the trapezoid skeleton unit, the cross beam is made of I-shaped steel, the spokes are made of H-shaped steel, and the spoke supports are round tubes.
As an improvement of the seawater filtering device for the nuclear power station, the net frame is provided with two cross beams, a cross beam connecting block is welded in the middle between the two cross beams, cross beam connecting channel steel is welded at two ends of the net frame, the net sheets are pressed on the cross beams through net plates, two net sheets are arranged on each net frame, and the net frame can be replaced integrally.
As an improvement of the seawater filtering device for the nuclear power station, the screen frame comprises a female screen frame and a male screen frame, the female screen frame and the male screen frame are installed on the framework structure in a staggered mode through the cross beam connecting blocks, and the female screen frame and the male screen frame are connected and overlapped together through bolts to form tight fit.
As an improvement of the seawater filtering device for the nuclear power station, the driving system comprises a horizontal speed reducer, two low-speed motors, a medium/high-speed motor, a coupler, a support, a driving shaft and a pinion, a driving gear ring is arranged on a framework system, and the pinion of the driving system is meshed with the driving gear ring and is positioned on the inner side of the seawater filtering device.
As an improvement of the seawater filtering device for the nuclear power station, the seawater filtering device is further provided with a sealing system, the sealing system is arranged between the seawater filtering device and water chamber walls on two sides of the seawater filtering device, the sealing system comprises a base sealing plate, a sealing contact plate, a sealing pressing plate, a sealing supporting plate and a sealing plate, and the sealing supporting plate is fixedly connected to a rim angle steel of a framework system through bolts.
As an improvement of the seawater filtering device for the nuclear power station, the seawater filtering device further comprises bearing lubricating systems, two sets of bearing lubricating systems are respectively arranged at two ends of the main shaft main body, and each set of bearing lubricating system comprises an oil tank and a lubricating pipeline for connecting the oil tank and the bearing.
As an improvement of the seawater filtering device for the nuclear power station, the seawater filtering device also comprises a backwashing water system, wherein the backwashing pipeline is arranged at the inner side of the seawater filtering device and comprises two sections of backwashing pipelines arranged at two sides of the spoke and a sewage discharge tank arranged at the outer side of the seawater filtering device.
As an improvement of the seawater filtering device for the nuclear power station, water flows in from the outer side of the circumferential surface of the seawater filtering device, and flows out from the inner side of the seawater filtering device after being filtered, garbage is intercepted at the outer side of the seawater filtering device, and the water level at the outer side of the seawater filtering device is higher than that at the inner side of the seawater filtering device.
Compared with the prior art, the seawater filtering device for the nuclear power station has the following advantages:
1) the water inlet mode is an 'external inlet and internal outlet' mode, garbage such as marine organisms and the like is intercepted outside the filtering device, and the impact load resistance is improved;
2) the trapezoid skeleton unit and the modularized mesh frame (the female mesh frame and the male mesh frame) form a skeleton system, two circles of rim angle steel in the skeleton system and a middle ring beam form 3 whole circles, and stability and reliability of the structure are guaranteed. In addition, the modular design of the female net frame and the male net frame can ensure the convenience and interchangeability of net piece replacement.
3) Compared with a double A-shaped framework structure, the trapezoidal framework structure can save half of the spoke consumption, and the back washing water pipe only needs to be provided with two sections, so that the structure is simplified, and the main shaft adopts a mature solid shaft forging process and has certain economical efficiency.
4) The novel protection device is arranged on the main shaft, so that the seawater filtering device cannot be damaged when the front and back pressure difference of the seawater filtering device is increased suddenly, and the safety and reliability of the seawater filtering device are guaranteed.
Drawings
The seawater filtering apparatus for a nuclear power plant and its advantageous effects will be described in detail with reference to the accompanying drawings and the following detailed description.
Fig. 1 is a schematic structural view of a seawater filtering apparatus for a nuclear power plant according to the present invention.
Fig. 2 is a schematic structural view of the seawater filtering apparatus for a nuclear power plant according to the present invention in another direction.
Fig. 3 is a schematic structural view of a sealing system in the seawater filtering apparatus for a nuclear power plant according to the present invention.
Fig. 4 is a schematic structural view of a driving system in the seawater filtering apparatus for a nuclear power plant according to the present invention.
Fig. 5 is a schematic structural view of a main shaft system in the seawater filtering apparatus for a nuclear power plant according to the present invention.
Fig. 6A and 6B are schematic structural views of a lubricating system in the seawater filtering apparatus for a nuclear power plant according to the present invention.
Fig. 7 and 8 are schematic structural views of a backwash water system in the seawater filtering apparatus for a nuclear power plant according to the present invention.
Fig. 9 is a schematic structural view of a skeleton system in the seawater filtering apparatus for a nuclear power plant according to the present invention.
Fig. 10 is a schematic structural view of a "trapezoidal" skeleton unit in the seawater filtering apparatus for a nuclear power plant according to the present invention.
Fig. 11 and 12 are schematic structural views of a mesh frame in a seawater filtering apparatus for a nuclear power plant according to the present invention.
Fig. 13 is a schematic view of connection between a mesh plate frame and a mesh plate frame in the seawater filtering apparatus for a nuclear power station according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantageous technical effects of the present invention clearer, the present invention is further described in detail with reference to the following embodiments. It should be understood that the embodiments described in this specification are only for the purpose of illustrating the present invention and are not intended to limit the present invention.
Referring to fig. 1 to 13, the present invention provides a seawater filtering apparatus for a nuclear power plant, including:
the spindle system 10 includes a spindle body 100 mounted on two bearing seats 110, a fixed end 102 located at one end of the spindle body 100, and a sliding end 104 opposite to the fixed end 102, wherein hubs 106 are respectively disposed on inner sides of the fixed end 102 and the sliding end 104, and keyways are disposed on the hubs 106;
the framework system 20 comprises a framework structure 200 and a net frame 220, wherein the framework structure 200 comprises a plurality of trapezoid framework units arranged on a hub 106, each framework unit is provided with a cross beam 202, two rim angle steels 204, a supporting ring beam 206 (the supporting ring beam 206 is formed by welding steel plates, a large gear ring is arranged on the supporting ring beam 206), two spokes 208 and a spoke support 210, the two spokes 208 form a trapezoid structure, the top of the trapezoid structure is supported on the cross beam 202, the bottom of the trapezoid structure is arranged on the hub 106, and the two rim angle steels 204 and the middle supporting ring beam 206 are connected into 3 circles to form a stable framework structure; and
and the driving system 30 drives the seawater filtering device to rotate at low speed, medium speed and high speed.
Referring to fig. 3, a bearing seat 110 is disposed on a backing plate (not shown), a limit guide block 112 is disposed between the bearing seat 110 and the backing plate, a limit pull rod 108 and a protection pull rod (not shown) are disposed above a main shaft body 100, the protection pull rod is disconnected when the seawater filtering device is subjected to a large buoyancy, the bearing seat 110 is separated from the backing plate, the seawater filtering device floats upwards along the limit guide block 112, and the seawater filtering device is limited at a safe position by the limit pull rod 108 after floating to a certain safe position.
Referring to fig. 9 and 10, in an embodiment of the seawater filtering apparatus for a nuclear power plant according to the present invention, the frame system includes a cross member 202 made of i-shaped steel, spokes 208 made of H-shaped steel, and spoke supports 210 made of round tubes.
Referring to fig. 11 to 13, according to an embodiment of the seawater filtering apparatus for a nuclear power plant of the present invention, a net frame 220 is provided with two beams 222, a beam connecting block 224 is welded in the middle between the two beams 222, beam connecting channel steel 226 is welded at both ends of the net frame, two net sheets 228 are pressed on the beams 222 through a net plate 230, two net sheets 228 are mounted on each net frame 220, and the net frame 220 can be replaced as a whole.
According to a preferred embodiment of the seawater filtering apparatus for a nuclear power plant of the present invention, the net frame 220 comprises a female net frame 232 and a male net frame 234, the female net frame 232 and the male net frame 234 are installed on the frame system in a staggered manner through a middle beam connection block 224, and the female net frame 232 and the male net frame 234 are connected together by bolts (not shown) to form a tight fit, as shown in fig. 13.
Referring to fig. 4, the driving system 30 includes a horizontal decelerator 300, two low-speed motors 302, a middle/high-speed motor 304, a coupling 306, a support 308, a driving shaft 310, and a pinion 312, wherein a driving ring gear is disposed on the frame system 20, and the pinion 312 of the driving system 30 is engaged with the driving ring gear and is located inside the seawater filtering device. The function of the driving system 30 is to provide driving force for the rotation of the seawater filtering device, so that the seawater filtering device rotates at low speed, medium speed and high speed under different working conditions.
Referring to fig. 5, in order to prevent contaminants from entering the inside of the seawater filtering apparatus (garbage is located outside the seawater filtering apparatus) during rotation, according to a preferred embodiment of the seawater filtering apparatus for a nuclear power plant of the present invention, a sealing system 40 is disposed between the seawater filtering apparatus and a wall of a water chamber (360 degrees around the circumference), the sealing system 40 includes a base sealing plate 400, a sealing contact plate 402, a sealing pressing plate 404, a sealing support plate 406, and a sealing plate 408, and the sealing support plate 406 is fixed to the rim angle 204 by bolts (not shown).
Referring to fig. 6A and 6B, in accordance with a preferred embodiment of the seawater filtering apparatus for a nuclear power plant of the present invention, the seawater filtering apparatus further includes a bearing lubrication system 50, a set of bearing lubrication systems 50 is respectively provided at both ends of the main shaft body 100, and each set of bearing lubrication system 50 includes an oil tank 500 and a lubrication line 502 connecting the oil tank 500 and the bearing.
Referring to fig. 7 and 8, the seawater filtering apparatus for a nuclear power plant, in which the garbage is outside the seawater filtering apparatus, further includes a back washing water system 60 for washing the garbage intercepted outside the mesh sheet into a sewage tank 602 to be discharged, according to a preferred embodiment of the seawater filtering apparatus for a nuclear power plant of the present invention. The backwash line 600 of the backwash water system 60 is arranged inside the seawater filtering device and comprises two sections of backwash line 600 arranged on either side of the spokes 208 and a blowdown tank 602 arranged outside the seawater filtering device.
According to one embodiment of the seawater filtering apparatus for a nuclear power plant of the present invention, a water flow flows in from the outside of the circumferential surface of the seawater filtering apparatus, and flows out from the inside of the seawater filtering apparatus after being filtered, and garbage is intercepted at the outside of the seawater filtering apparatus, and the water level at the outside of the seawater filtering apparatus is higher than the water level at the inside of the seawater filtering apparatus.
Referring to fig. 1 to 13, the seawater filtering apparatus for a nuclear power plant according to the present invention has the following operation principle:
firstly, connecting an I-shaped steel beam 202, a support ring beam 206, a rim angle steel 204, spokes 208 and spoke supports 210 into a trapezoidal skeleton structure unit of the seawater filtering device, wherein the trapezoidal skeleton structure unit is arranged on a hub 106 of a main shaft system 10 to form a skeleton system 20, and the skeleton system 20 is supported by the main shaft system 10;
secondly, the net frame 220 with the net sheets 228 is arranged on the framework, the female net frame 232 and the male net frame 234 are arranged in a staggered mode, and the net frame 220 is connected with the framework and comprises three parts: the beam 222 connecting block in the middle of the net frame 220 is connected with the ring beam 206 of the framework system, and the beam 202 connecting channel steel on the left side and the right side of the net frame 220 is connected with the rim angle steel 204 at the two ends of the framework system. In addition, the male net frame 234 and the female net frame 232 are connected together through bolts, so that the net frames 220 and the frameworks are connected into a whole, the net frames 220 form a small module, when the net frames 220 are under the pressure action of water, the whole net frames 220 are bent, and the acting force is transmitted to the adjacent net frames 220 through the action of the rim angle steel 204, so that all the net frames 220 and the frameworks form a cylindrical structure with stable structure. When a certain net piece 228 of the structure of the seawater filtering device is damaged and needs to be replaced, only the corresponding net frame 220 needs to be detached to replace the net piece 228.
The water flow enters the filtering device from the outer side of the seawater filtering device and then flows out from the inner side of the seawater filtering device, the garbage is intercepted at the outer side of the seawater filtering device, a sewage salvaging bucket is installed on each net frame to salvage the garbage in the water, a large gear ring is installed at a ring beam at the middle part of the seawater filtering device, a pinion drives the large gear ring to drive the seawater filtering device to rotate, the garbage fished by the sewage salvaging bucket and the garbage on the net surface are brought to a sewage discharge groove, and then the garbage is washed into the sewage discharge groove by a back flush water pipe and is discharged.
Under the normal operation condition, the seawater filtering device is in an automatic operation state (low speed: 2.5m/min), the dirt outside the seawater filtering device is increased, when the water head difference between the front and the rear of the seawater filtering device is increased, when the water head difference detected by any one of the 3 groups of water head difference meters is larger than 0.1m water column, the filtering device is switched to a medium speed operation state (medium speed: 10m/min) and continuously operates, and once the water head differences detected by the three groups of water head difference meters are all lower than 0.1m water column, the filtering device is switched back to the low speed operation state (or is switched to the medium speed operation state in a manual control mode). If the water head is increased continuously, the water head detected by any two sets of water head meters in the three sets of water head meters reaches 0.2m water column, the filtering device is switched to a high-speed operation state (high speed: 20 m/min). If the water level difference continues to increase, when the water level difference passing through the net detected by any two of the three sets of water level difference meters reaches 0.3m water column, a first remote alarm signal is output to the central control room. When the water level difference of any two of the three sets of water level difference meters is detected to be increased continuously and reaches 0.5m water column, a second remote alarm signal is output to the central control room, and the CRF circulating water pump corresponding to the filtering device is stopped.
Compared with the prior art, the seawater filtering device for the nuclear power station has the following advantages:
1) the water inlet mode is an 'external inlet and internal outlet' mode, garbage such as marine organisms and the like is intercepted outside the filtering device, and the impact load resistance is improved;
2) the trapezoid skeleton unit and the modularized mesh frame (the female mesh frame and the male mesh frame) form a skeleton system, two circles of rim angle steel in the skeleton system and a middle ring beam form 3 whole circles, and stability and reliability of the structure are guaranteed. In addition, the modular design of the female net frame and the male net frame can ensure the convenience and interchangeability of net piece replacement.
3) Compared with a double A-shaped framework structure, the trapezoidal framework structure can save half of the spoke consumption, and the back washing water pipe only needs to be provided with two sections, so that the structure is simplified, and the main shaft adopts a mature solid shaft forging process and has certain economical efficiency.
4) The novel protection device is arranged on the main shaft, so that the seawater filtering device cannot be damaged when the front and back pressure difference of the seawater filtering device is increased suddenly, and the safety and reliability of the seawater filtering device are guaranteed.
Appropriate changes and modifications to the embodiments described above will become apparent to those skilled in the art from the disclosure and teachings of the foregoing description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. A seawater filtering device for a nuclear power plant, comprising:
the spindle system comprises a spindle main body arranged on two bearing seats, a fixed end positioned at one end of the spindle main body and a sliding end opposite to the fixed end, wherein hubs are respectively arranged on the inner sides of the fixed end and the sliding end, and key grooves are arranged on the hubs;
the framework system comprises a framework structure and a screen frame, wherein the framework structure comprises a plurality of trapezoid framework units arranged on a hub, each trapezoid framework unit is provided with a cross beam, two rim angle steels, a supporting ring beam, two spokes and a spoke support, the two spokes form a trapezoid structure, the top of the trapezoid structure is supported on the cross beam, the bottom of the trapezoid structure is arranged on the hub, and the two rim angle steels and the middle supporting ring beam are connected into 3 circumferences to form a stable framework structure;
and the driving system drives the seawater filtering device to rotate at low speed, medium speed and high speed.
2. The seawater filtering device for the nuclear power station as claimed in claim 1, wherein the main shaft bearing seat is disposed on the backing plate, a limit guide block is disposed between the bearing seat and the backing plate, a limit pull rod and a protection pull rod are disposed above the main shaft body, the protection pull rod is disconnected when the seawater filtering device is subjected to a large buoyancy, the bearing seat is separated from the backing plate, the seawater filtering device floats upwards along the limit guide block, and the seawater filtering device is restricted at a safe position by the limit pull rod after floating to a certain safe position.
3. The seawater filtering device for the nuclear power station as claimed in claim 1, wherein in the "trapezoid" skeleton unit, the cross beam is an i-shaped steel, the spokes are H-shaped steel, and the spoke supports are round tubes.
4. The seawater filtering device for the nuclear power station as claimed in claim 1, wherein the net frame is provided with two beams, a beam connecting block is welded in the middle between the two beams, beam connecting channel steel is welded at two ends of the net frame, the net sheets are pressed on the beams through net plates, two net sheets are arranged on each net frame, and the net frame can be replaced integrally.
5. The seawater filtering device for the nuclear power station as claimed in claim 4, wherein the net frame comprises a female net frame and a male net frame, the female net frame and the male net frame are installed on the framework structure in a staggered mode through the cross beam connecting blocks, and the female net frame and the male net frame are connected and overlapped together through bolts to form a tight fit.
6. The seawater filtering device for a nuclear power plant as claimed in claim 1, wherein the driving system comprises a horizontal decelerator, two low-speed motors, a middle/high-speed motor, a coupling, a support, a driving shaft and a pinion, a driving gear ring is provided on the skeleton system, and the pinion of the driving system is engaged with the driving gear ring and is located inside the seawater filtering device.
7. The seawater filtering device for the nuclear power station as claimed in claim 1, further comprising a sealing system, wherein the sealing system is arranged between the seawater filtering device and the water chamber wall bodies at two sides of the seawater filtering device, the sealing system comprises a base sealing plate, a sealing contact plate, a sealing pressing plate, a sealing supporting plate and a sealing plate, and the sealing supporting plate is fixed on the rim angle steel of the skeleton system through bolt connection.
8. The seawater filtering device for a nuclear power plant as claimed in claim 1, further comprising a bearing lubrication system, wherein each set of bearing lubrication system is provided at each end of the main shaft body, and each set of bearing lubrication system comprises an oil tank and a lubrication pipeline connecting the oil tank and the bearing.
9. The seawater filtering device for a nuclear power plant as claimed in claim 1, further comprising a back-flushing water system, wherein the back-flushing pipeline is arranged inside the seawater filtering device and comprises two sections of back-flushing pipelines arranged at both sides of the spoke and a sewage draining tank arranged outside the seawater filtering device.
10. The seawater filtering apparatus for a nuclear power plant as claimed in any one of claims 1 to 9, wherein the water flows in from the outside of the circumferential surface of the seawater filtering apparatus, and flows out from the inside of the seawater filtering apparatus after being filtered, and the garbage is intercepted at the outside of the seawater filtering apparatus, and the water level at the outside of the seawater filtering apparatus is higher than the water level at the inside of the seawater filtering apparatus.
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| CN201910380304.8A CN111916242B (en) | 2019-05-08 | 2019-05-08 | Seawater filtering device for nuclear power station |
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| CN201910380304.8A CN111916242B (en) | 2019-05-08 | 2019-05-08 | Seawater filtering device for nuclear power station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113669262A (en) * | 2021-08-24 | 2021-11-19 | 龙菊蓉 | Water taking device for cooling nuclear power plant |
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| CN111916242B (en) | 2023-04-18 |
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