WO2022198928A1 - 燃料水池快速排水装置及燃料水池快速排水方法 - Google Patents

燃料水池快速排水装置及燃料水池快速排水方法 Download PDF

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Publication number
WO2022198928A1
WO2022198928A1 PCT/CN2021/116594 CN2021116594W WO2022198928A1 WO 2022198928 A1 WO2022198928 A1 WO 2022198928A1 CN 2021116594 W CN2021116594 W CN 2021116594W WO 2022198928 A1 WO2022198928 A1 WO 2022198928A1
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WIPO (PCT)
Prior art keywords
pipe
fuel pool
drainage
water
air
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PCT/CN2021/116594
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English (en)
French (fr)
Inventor
袁美春
王刚
南夏瑜
徐念
Original Assignee
中广核工程有限公司
中国广核集团有限公司
中国广核电力股份有限公司
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Application filed by 中广核工程有限公司, 中国广核集团有限公司, 中国广核电力股份有限公司 filed Critical 中广核工程有限公司
Publication of WO2022198928A1 publication Critical patent/WO2022198928A1/zh

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F3/00—Sewer pipe-line systems
    • E03F3/02—Arrangement of sewer pipe-lines or pipe-line systems
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F3/00—Sewer pipe-line systems
    • E03F3/04—Pipes or fittings specially adapted to sewers

Definitions

  • the invention relates to the technical field of nuclear power plant debugging, in particular to a fuel pool rapid drainage device and a fuel pool rapid drainage method for nuclear power plants.
  • the existing solution is to use a submersible pump to pump out the water in the fuel pool after the water quality of the fuel pool deteriorates, and then re-inject new desalinated water into the fuel pool.
  • This method is inefficient and time-consuming, and it takes about 7 days to perform a water exchange operation in the fuel pool; the operation risk is high, the fuel pool is filled with fuel grids, and the submersible pump is hoisted into the fuel pool to draw water, which may easily damage the valuables in the pool. Equipment; drainage performance is unreliable, and the phenomenon of pump burning often occurs during use.
  • the technical problem to be solved by the present invention is to provide a fast-draining device and a fast-draining method for fuel pools, which can realize on-line water exchange, stable and reliable fuel pools in nuclear power plants.
  • a fast drainage device for a fuel pool which includes a drainage pipe, a drainage control valve, an air extractor and an air extraction pipe;
  • the first end of the drainage pipe is used to extend into the fuel pool;
  • the drainage control valve is connected to the second end of the drainage pipe to control the on-off of the drainage pipe or adjust the drainage flow of the drainage pipe ;
  • the air extraction pipe is connected between the second end of the drain pipe and the air extractor; the air extractor draws out the air inside the drain pipe through the air extraction pipe, so that the water in the fuel pool enters Drain the pipe to create an inverted siphon.
  • the drain pipe is a steel wire hose.
  • the drainage pipe is a DN100 steel wire hose.
  • the drain pipe is formed by connecting at least two steel wire hoses; a sealing connection component is provided at the butt joint of two adjacent steel wire hoses;
  • the sealing connection assembly includes a hard pipe passing through the butt ends of the two steel wire hoses, a reticulated pipe wrapped outside the butt ends of the two steel hoses, and wound on the reticulated pipes. the wire that is fastened to the wire hose;
  • the outer periphery of the hard pipe is wrapped with paper tape and coated with sealant to seal the gap between the hard pipe and the butt end of the steel wire hose.
  • the air extractor comprises an air extraction cylinder, a valve assembly, a piston arranged in the air extraction cylinder and movable up and down along the air extraction cylinder, and arranged on the air extraction cylinder and connected to drive the piston to move up and down. handle;
  • the air extraction cylinder is provided with an air extraction interface, and the air extraction interface is connected to the air extraction pipe through the valve assembly.
  • the valve assembly comprises a three-way joint, a first one-way valve for preventing gas from being discharged from the suction cylinder into the suction pipe, a second one-way valve for discharging the gas in the suction cylinder, and a A ball valve for controlling the on-off of the suction port;
  • the three-way joint is connected to the air extraction interface with one joint, and the first one-way valve and the second one-way valve are respectively connected horizontally and vertically to the other two joints of the three-way joint;
  • the ball valve is connected between the first one-way valve and the air suction pipe.
  • valve assembly further comprises a ferrule threaded joint connected between the ball valve and the air suction pipe.
  • the fuel pool rapid drainage device further comprises a connection assembly fitted on the second end of the drainage pipe; the drainage pipe is connected to the drainage control valve and the air extraction pipe through the connection assembly.
  • a connecting pipe Preferably, a connecting pipe, a branch pipe connected to the side of the connecting pipe and communicating with it;
  • the second end of the drain pipe is tightly fitted on the first end of the connection pipe, and the opposite second end of the connection pipe is connected with the drain control valve through screw fitting;
  • the branch pipe is connected with the air suction pipe through a ferrule joint.
  • the first end of the connecting pipe is a pagoda joint.
  • the side surface of the connecting pipe is further provided with at least one fixed support rod; the axial direction of the fixed support rod is relatively perpendicular to the axial direction of the connecting pipe.
  • the connecting assembly includes a connecting pipe and a connecting flange that are axially connected;
  • connection pipe The second end of the drain pipe is tightly fitted on the connection pipe; the connection flange is matched and connected with the flange on the drain control valve;
  • One end of the connecting pipe away from the connecting flange is a pagoda joint; one end of the connecting pipe close to the connecting flange is provided with a branch pipe connected with the air extraction pipe.
  • the fuel pool rapid drainage device further includes a tooling trolley or a mobile bracket; the drainage control valve and the air extractor are both mounted on the tooling trolley or the mobile bracket.
  • the present invention also provides a method for rapidly draining a fuel pool, using the device for rapidly draining a fuel pool described in any one of the above, and the method for rapidly draining a fuel pool includes the following steps:
  • the method for rapidly draining the fuel pool further comprises the following steps:
  • the fuel pool rapid drainage device of the present invention is connected with an air extractor, a drain control valve and a drain pipe, and the air extractor draws air from the drain pipe to form an inverted siphon, and discharges the water in the fuel pool by the siphon effect, thereby realizing the siphon effect on the fuel pool.
  • the device can be arranged outside the fuel plant, and only needs to be extended into the fuel pool through the drain pipe, and there is no need to pump air at the side of the fuel pool, avoiding the risk of introducing foreign objects into the fuel pool, and there is no risk of personnel falling or operation in the fuel pool. , to ensure the smooth progress of the PTR system flushing test, cooling pump performance test, purification test, skimming test and other tests.
  • a special air extractor is used to extract air from the drainage pipe, which solves the problem of low air extraction efficiency of the existing air extractor, does not require electricity, and is more convenient to use.
  • FIG. 1 is a schematic structural diagram of a fuel pool rapid drainage device according to a first embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of an embodiment of the drain pipe in FIG. 1;
  • Fig. 3 is the structural representation of the connection assembly in Fig. 1;
  • FIG. 4 is a schematic structural diagram of a fuel pool rapid drainage device according to a second embodiment of the present invention.
  • the device for quickly draining the fuel pool may include a drain pipe 10 , a drain control valve 20 , an air extractor 30 and an air extraction pipe 40 .
  • the drain pipe 10 has opposite first and second ends; the first end of the drain pipe 10 is used to extend into the fuel pool to drain the water in the fuel pool; the second end of the drain pipe 10 is away from the fuel pool.
  • the drainage control valve 20 is connected to the second end of the drainage pipe 10 to control the on-off of the drainage pipe 10 or adjust the drainage flow of the drainage pipe 10 .
  • the air extraction pipe 40 is connected between the second end of the drain pipe 10 and the air extractor 30 .
  • the air extractor 30 is far away from the fuel water pool, and the air inside the drain pipe 10 is drawn out through the air extraction pipe 40, so that the water in the fuel water pool enters the drain pipe 10, and an inverted siphon is established.
  • the drainage pipe 10 is preferably a steel wire hose, and more preferably a PVC transparent steel wire hose, so as to facilitate the observation of the water inflow in the drainage pipe 10 .
  • the drainage flow of the drain pipe 10 should match the maximum replenishment flow of the fuel pool (the maximum replenishment flow is 108m 3 /h) to achieve dynamic balance of the fuel pool liquid level, which is stable and reliable, and will not stop midway.
  • the maximum replenishment flow can reach 427.85 m 3 /h
  • the drainage capacity is 14.26 times that of the submersible pump. times, to meet the requirements of rapid drainage. Therefore, in this embodiment, the drainage pipe 10 is preferably a DN100 steel wire hose, which can achieve large flow and fast drainage and can match the maximum water replenishment flow.
  • the length of the drain pipe 10 is set according to the distance between the drain control valve 20 and the air extraction pipe 40 and the fuel pool.
  • the butt joints of each adjacent two steel wire hoses should have sufficient sealing degree and strength to ensure the air extraction effect before drainage and avoid the butt joints falling off during drainage. There is a water leak problem.
  • a sealing connection assembly is provided at the butt joint of two adjacent steel wire hoses 11 , which effectively solves the problem that the two steel wire hoses 11 are not fixed. point question.
  • the sealing connection component may include a rigid tube 12, an anilox tube 13, a metal wire 14, and the like.
  • the hard pipe 12 can be a metal pipe such as an iron pipe, and the diameter is slightly smaller than the inner diameter of the steel wire hose 11; the butt ends of the two steel wire hoses 11 are respectively sleeved on both ends of the hard pipe 12, so that the hard pipe 12 passes through In the butt ends of the two wire hoses 11, the butt ends of the two wire hoses 11 are connected together.
  • the outer periphery of the hard pipe 12 is wrapped with paper tape (not shown), and is also coated with sealant, and the butt ends of the hard pipe 12 and the steel wire hose 11 are connected. The gaps between them are sealed and the fit is firm.
  • the mesh tube 13 is wrapped around the butt ends of the two steel wire hoses 11 , and wraps the butt ends of the two steel wire hoses 11 inside.
  • the mesh tube 13 is pre-cut to form a slit on the side, and the mesh tube 13 is sleeved on the side of the steel hose 11 through the slit for wrapping. Because the anilox tube 13 and the steel wire hose 11 are both made of plastic, the two can be closely attached together, and have sufficient strength of friction.
  • the metal wire is wound around the anilox tube 13 to fasten it on the steel wire hose 11 to prevent the anilox tube 13 from coming off.
  • connection between the drain pipe 10 , the drain control valve 20 , the air extractor 30 , etc. is detachable, which is convenient for replacement and storage of the drain pipe 10 .
  • the air extractor 30 is different from the conventional electric air extractor.
  • the aspirator 30 includes a suction cylinder 31 , a valve assembly, a piston (not shown), and a handle 32 .
  • a bracket 33 is arranged outside the air extraction cylinder 31 to support and strengthen the structure; the piston is arranged in the air extraction cylinder 31 and can move up and down along the air extraction cylinder 31; the handle 32 is arranged on the air extraction cylinder 31 and is connected to the piston to drive the piston to move up and down to realize pumping. air and exhaust.
  • the air extraction cylinder 31 is provided with an air extraction interface 34 , and the air extraction interface 34 is located at the lower end of the air extraction cylinder 31 .
  • the handle 32 is rotated to drive the piston to move from the lower end to the upper end of the air extraction cylinder 31, the gas enters the air extraction cylinder 31 from the air extraction interface 34; The gas is discharged from the exhaust port 34.
  • the suction port 34 is connected to the suction pipe 40 through a valve assembly.
  • the valve assembly includes a three-way joint 35 , a first check valve 36 , a second check valve 37 and a ball valve 38 .
  • One of the three-way joints 35 is connected to the suction port 34 , and the other two joints are used to connect the first one-way valve 36 and the second one-way valve 37 respectively.
  • the first one-way valve 36 is horizontally connected to one of the joints to prevent the gas from passing through to be discharged from the suction cylinder 31 to the suction pipe 40; the second one-way valve 37 is connected vertically On the other joint, the gas in the suction cylinder 31 is exhausted through.
  • the ball valve 38 is connected between the first one-way valve 36 and the air extraction pipe 40 , and is used to control the opening and closing of the air extraction interface 34 and isolate the air extraction device 30 and the drain pipe 10 .
  • the suction pipe 40 is preferably a negative pressure-resistant plastic hose.
  • the valve assembly further includes a ferrule threaded joint 39 connected between the ball valve 38 and the air suction pipe 40 .
  • the ball valve 38 adopts an external tooth type mini ball valve
  • the ferrule threaded joint 39 is a ferrule-to-external cone threaded joint, which is threadedly connected with the ball valve 38 .
  • the air extractor 30 can be fixed on a base 310 as a whole to form an integral module, which facilitates the transportation or fixed installation of the air extractor 30 .
  • the fuel pool quick draining device of the present invention further includes a connecting component 50 fitted on the second end of the drain pipe 10 ;
  • the connecting assembly 50 includes a connecting pipe 51 and a branch pipe 52 .
  • the branch pipe 52 is connected to the side surface of the connecting pipe 51 and communicates with the connecting pipe 51 .
  • the connecting pipe 51 has opposite first and second ends.
  • the second end of the drain pipe 10 is tightly fitted on the first end of the connecting pipe 51; the first end of the connecting pipe 51 is a pagoda joint, which is convenient to penetrate into the drain pipe 10 and fasten with iron wires.
  • Paper tape is also wrapped between the connecting pipe 51 and the second end of the drain pipe 10 to fill the gap between the two to achieve sealing. Sealant is applied to the gaps of the paper tape; the sealant can be applied repeatedly to cover the cracks on the paper tape and form a sealing medium with the paper tape, which can perfectly cover the gap and has a good sealing effect.
  • the second end of the connecting pipe 52 is provided with an external thread 511, and is connected to the drain control valve 20 through thread fit.
  • the axial direction of the branch pipe 52 is relatively perpendicular to the axial direction of the connecting pipe 51 , and is used for connecting with the air suction pipe 40 through the ferrule joint 53 .
  • the pipe diameter of the branch pipe 52 is set corresponding to the pipe diameter of the air extraction pipe 40 , and the ferrule joint 53 is fitted at the butt joint of the branch pipe 52 and the air extraction pipe 40 to seal the connection between the two.
  • the side surface of the connecting pipe 51 is further provided with at least one fixed support rod 54 ; the axial direction of the fixed support rod 54 is relatively perpendicular to the axial direction of the connecting pipe 51 .
  • the setting of the fixing support rod 54 is convenient for rotating the connecting assembly 50 to screw it on the drainage control valve 20 , or when rotating the drainage control valve 20 to connect it with the connecting assembly 50 , it plays the role of fixing the connecting assembly 50 .
  • the fuel pool rapid drainage device includes a drainage pipe, a drainage control valve 20 , an air extractor 30 , an air extraction pipe and a connecting assembly 50 .
  • the drain pipe and the air extraction pipe refer to the drain pipe 10 and the air extraction pipe 40 shown in FIG. 1
  • the connection forms of the structures of the drain control valve 20 , the air extractor 30 , the air extraction pipe and the connecting assembly 50 refer to the first implementation shown in FIG. 1 above For example, it will not be repeated here.
  • the connecting assembly 50 includes a connecting pipe 51' and a connecting flange 52' which are axially connected and communicated.
  • the second end of the drain pipe is tightly fitted on the connection pipe 51'; the end of the connection pipe 51' away from the connection flange 52' is a pagoda joint, which is convenient for penetrating into the drain pipe.
  • Paper tape is also wrapped between the connecting pipe 51' and the second end of the drain pipe to fill the gap between the two to achieve sealing. Sealant is applied to the gaps of the paper tape; the sealant can be applied repeatedly to cover the cracks on the paper tape and form a sealing medium with the paper tape, which can perfectly cover the gap and has a good sealing effect.
  • the connecting flange 52 ′ is connected with the flange 21 on the drain control valve 20 in cooperation.
  • One end of the connecting pipe 51' close to the connecting flange 52' is provided with a branch pipe 53', which is used to connect with the suction pipe and communicate with the connecting assembly 50 and the suction pipe; the connection between the suction pipe and the connecting assembly 50 is shown in FIG.
  • the pipe diameter of the branch pipe 53' is set corresponding to the pipe diameter of the air extraction pipe.
  • the branch pipe 53' is sealedly connected to the air suction pipe 40 through a ferrule joint.
  • the device for fast draining of the fuel pool in this embodiment further includes a trolley 60 .
  • the connection assembly 50 is connected with the drainage control valve 20 into one body.
  • the drainage control valve 20 and the air extractor 30 are both installed on the tooling trolley 60, and the above structures are integrated into one, which is convenient to move.
  • the tooling trolley 60 can also be replaced by a mobile bracket to achieve the same function.
  • the fuel pool rapid drainage device of the first embodiment above may also include a tooling trolley 60 or a moving bracket, which integrates the drainage control valve 20 and the air extractor 30 into one body for easy movement.
  • the fuel pool rapid drainage device of the present invention is used for the rapid drainage of a fuel pool in a nuclear power plant.
  • the fuel pool rapid drainage method realized by the fuel pool rapid drainage device may include the following steps:
  • the connecting assembly 50 is connected to the drainage control valve 20, and the air extractor 30 is adjacent to the drainage control valve 20 Arranged and connected to the connection assembly 50 through the suction pipe 40 .
  • move the tooling trolley 60 or the mobile support integrated with the drainage control valve 20, the connecting assembly 50, the air extractor 30, etc. to above the drainage channel outside the factory building, without needing to be on the 20-meter platform of the fuel factory building or beside the fuel pool.
  • the second end of the drain pipe 10 is connected to the connection assembly 50 .
  • the air extractor 30 is operated, and the handle 32 is shaken up and down to drive the piston to move up and down.
  • the air in the drain pipe 10 is drawn into the air suction cylinder 31 , and then is discharged from the air suction cylinder 31 to the external environment through the second one-way valve 37 .
  • the ball valve 38 in the valve assembly is closed, and the connection between the air extractor 30 and the air extraction pipe 40 is disconnected, that is, the communication between the air extractor 30 and the drain pipe 10 is disconnected.
  • drain control valve 20 Since the drain control valve 20 is placed above the drain outside the plant, the drained water goes directly down into the drain.
  • S5. Open the demineralized water storage and distribution system (SED, Demineralized water storage and distribution system), to replenish water for the fuel pool, adjust the opening of the drain control valve 20 to dynamically balance the liquid level of the fuel pool, and to achieve a stable maximum flow of online water exchange.
  • SED demineralized water storage and distribution system
  • the water level in the DN100PVC transparent steel wire hose can be raised by 5.5 meters, and a full pipe siphon can be established. .
  • the air suction device 30 is used to continue to pump air, and pressing the handle 32 does not appear to be laborious, which proves that the lever length is set reasonably.
  • the water level will not fall back to the fuel pool, which proves that the sealing of each point of the device is good.
  • the drainage control valve 20 is fully opened, and the siphon drainage realizes the rapid drainage of the fuel pool.
  • the average drainage rate of the device is 147 m 3 /h, which is higher than the maximum water replenishment of the SED.
  • the flow rate is 108m 3 /h, which can realize the maximum flow rate of the fuel pool for online water exchange, ensure that the water quality of the fuel pool is in a qualified state for a long time, and effectively solve the problem that the PTR test cannot be performed due to the excessive suspended matter in the fuel pool.

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Abstract

提供一种燃料水池快速排水装置及燃料水池快速排水方法，燃料水池快速排水装置包括排水管（10）、排水控制阀（20）、抽气器（30）以及抽气管（40）；排水管（10）的第一端用于伸进燃料水池内；排水控制阀（20）连接在排水管（10）的第二端上，控制排水管（10）的通断或调节排水管（10）的排水流量；抽气管（40）连接在排水管（10）的第二端和抽气器（30）之间；抽气器（30）通过抽气管（40）将排水管（10）内部的空气抽出，使燃料水池内的水进入排水管（10），建立倒虹吸。通过抽气器（30）对排水管（10）抽气形成倒虹吸，以虹吸效应将燃料水池内的水排出，实现快速在线换水，无需在燃料水池边进行抽气，避免了向燃料水池内引入异物的风险，无人员坠落风险及燃料水池内作业风险，保证PTR系统冲洗试验、冷却泵性能试验、净化试验等试验顺利进行。

Description

燃料水池快速排水装置及燃料水池快速排水方法 技术领域
本发明涉及核电站调试技术领域，尤其涉及一种用于核电站的燃料水池快速排水装置及燃料水池快速排水方法。
 背景技术
在执行燃料水池冷却和净化系统调试期间，经常面临燃料水池悬浮物超标，导致泵前滤网频繁堵塞，试验无法进行下去的问题。
针对上述问题，现有采用的解决方法是在燃料水池水质变差后，使用潜水泵将燃料水池的水抽出，然后重新往燃料水池注入新的除盐水。该方法效率低、耗时长，执行一次燃料水池换水操作，需要耗时7天左右；作业风险高，燃料水池内部装满燃料格架，吊装潜水泵进燃料水池抽水容易碰坏水池内的贵重设备；排水性能不可靠，使用期间经常出现烧泵的现象。
 技术问题
本发明要解决的技术问题在于，提供一种实现核电站中燃料水池在线换水、稳定可靠的燃料水池快速排水装置及燃料水池快速排水方法。
 技术解决方案
本发明解决其技术问题所采用的技术方案是：提供一种燃料水池快速排水装置，包括排水管、排水控制阀、抽气器以及抽气管；
所述排水管的第一端用于伸进燃料水池内；所述排水控制阀连接在所述排水管的第二端上，控制所述排水管的通断或调节所述排水管的排水流量；
所述抽气管连接在所述排水管的第二端和所述抽气器之间；所述抽气器通过所述抽气管将所述排水管内部的空气抽出，使燃料水池内的水进入排水管，建立倒虹吸。
优选地，所述排水管为钢丝软管。
优选地，所述排水管为DN100钢丝软管。
优选地，所述排水管由至少两根钢丝软管连接形成；相邻的两根所述钢丝软管的对接处设有密封连接组件；
所述密封连接组件包括穿设在两根所述钢丝软管的对接端内的硬管、包裹在两根所述钢丝软管的对接端外的网纹管、缠绕在所述网纹管上将其箍紧在所述钢丝软管上的金属丝；
所述硬管的外周缠绕有纸胶带并涂覆有密封胶，将所述硬管和钢丝软管的对接端之间的缝隙进行密封。
优选地，所述抽气器包括抽气筒、阀门组件、设置在所述抽气筒内并可沿所述抽气筒上下运动的活塞、设置在所述抽气筒上并连接以带动所述活塞上下运动的手柄；
所述抽气筒上设有抽气接口，所述抽气接口通过所述阀门组件连接所述抽气管。
优选地，所述阀门组件包括三通接头、防止气体从所述抽气筒排至所述抽气管内的第一单向阀、用于所述抽气筒内气体排出的第二单向阀、用于控制所述抽气接口通断的球阀；
所述三通接头以其中一接头连接所述抽气接口，所述第一单向阀和所述第二单向阀分别水平连接和竖向连接所述三通接头的另外两个接头上；所述球阀连接在所述第一单向阀和所述抽气管之间。
优选地，所述阀门组件还包括连接在所述球阀和所述抽气管之间的卡套螺纹接头。
优选地，所述燃料水池快速排水装置还包括配合在所述排水管的第二端上的连接组件；所述排水管通过所述连接组件与所述排水控制阀和抽气管连接。
优选地，连接管、连接在所述连接管侧面并与其相连通的支管；
所述排水管的第二端紧密配合在所述连接管的第一端上，所述连接管的相对的第二端通过螺纹配合与所述排水控制阀连接；
所述支管通过卡套接头与所述抽气管连接。
优选地，所述连接管的第一端为宝塔接头。
优选地，所述连接管的侧面还设有至少一根固定支棒；所述固定支棒的轴向与所述连接管的轴向相对垂直。
优选地，所述连接组件包括轴向相接的连接管和连接法兰；
所述排水管的第二端紧密配合在所述连接管上；所述连接法兰与所述排水控制阀上的法兰配合连接；
所述连接管远离所述连接法兰的一端为宝塔接头；所述连接管靠近所述连接法兰的一端上设有与所述抽气管连接的支管。
优选地，所述燃料水池快速排水装置还包括工装小车或移动支架；所述排水控制阀及抽气器均安装在所述工装小车或移动支架上。
本发明还提供一种燃料水池快速排水方法，采用以上任一项所述的燃料水池快速排水装置，所述燃料水池快速排水方法包括以下步骤：
S1、将排水管的第一端伸进燃料水池内并位于液面下方；
S2、在排水控制阀处于关闭状态下，操作抽气器，将所述排水管内部的空气抽出，使燃料水池内的水进入排水管，建立倒虹吸；
S3、断开所述抽气器和所述排水管的连通，结束抽气；
S4、打开所述排水控制阀，所述燃料水池内的水在虹吸效应下通过所述排水管和排水控制阀排出。
优选地，所述燃料水池快速排水方法还包括以下步骤：
S5、打开除盐水贮存和分配系统的补水阀，为所述燃料水池补水，调节所述排水控制阀的开度，使所述燃料水池的液位动态平衡。
 有益效果
本发明的燃料水池快速排水装置，以抽气器、排水控制阀和排水管连接，通过抽气器对排水管抽气形成倒虹吸，以虹吸效应将燃料水池内的水排出，实现对燃料水池进行快速的在线换水。该装置可以布置在燃料厂房外，只需通过排水管伸进燃料水池内，无需在燃料水池边进行抽气，避免了向燃料水池内引入异物的风险，无人员坠落风险及燃料水池内作业风险，保证PTR系统冲洗试验、冷却泵性能试验、净化试验、撇沫试验等试验顺利进行。
以专用的抽气器对排水管进行抽气，解决现有采用的抽气机抽气效率低的问题，无需用电，使用更加方便。
 附图说明
下面将结合附图及实施例对本发明作进一步说明，附图中：
图1是本发明第一实施例的燃料水池快速排水装置的结构示意图；
图2是图1中排水管的一个实施例的结构示意图；
图3是图1中连接组件的结构示意图；
图4是本发明第二实施例的燃料水池快速排水装置的结构示意图。
 本发明的实施方式
为了对本发明的技术特征、目的和效果有更加清楚的理解，现对照附图详细说明本发明的具体实施方式。
如图1所示，本发明第一实施例的燃料水池快速排水装置，可包括排水管10、排水控制阀20、抽气器30以及抽气管40。
排水管10具有相对的第一端和第二端；排水管10的第一端用于伸进燃料水池内，以将燃料水池内的水排出；排水管10的第二端远离燃料水池。排水控制阀20连接在排水管10的第二端上，控制排水管10的通断或调节排水管10的排水流量。抽气管40连接在排水管10的第二端和抽气器30之间。抽气器30远离燃料水池，通过抽气管40将排水管10内部的空气抽出，使燃料水池内的水进入排水管10，建立倒虹吸。
其中，排水管10优选钢丝软管，进一步优选PVC透明钢丝软管，便于观察排水管10内进水情况。排水管10的排水流量应与燃料水池最大补水流量匹配（最大补水流量108m 3/h），实现燃料水池液位动态平衡，稳定可靠，不会中途停止。基于伯努利方程计算，一根DN100（公称直径100mm）的虹吸管，在不考虑沿程阻力和局部水头损失的情况下，最大排水流量可达到427.85 m 3/h，排水能力是潜水泵的14.26倍，满足快速排水的要求。因此，本实施例中，排水管10优选DN100钢丝软管，实现大流量快速排水且能与最大补水流量匹配。
排水管10的长度根据排水控制阀20和抽气管40与燃料水池的布置距离设置，其可以是整体的一钢丝软管形成，也可以由至少两根钢丝软管依次连接形成。
对于由多根钢丝软管连接形成的排水管10，其中每相邻的两根钢丝软管的对接处应具有足够的密封度及强度，保证排水前的抽气效果以及避免排水时对接处脱开出现漏水问题。如图2所示，为实现对接处的密封度及强度，相邻的两根钢丝软管11的对接处设有密封连接组件，密封连接组件有效解决了两根钢丝软管11之间没有固定点问题。密封连接组件可包括硬管12、网纹管13及金属丝14等。
其中，硬管12可以是铁管等金属管，直径稍小于钢丝软管11的内径；两根钢丝软管11的对接端分别套设在硬管12的两端上，使得硬管12穿设在两根钢丝软管11的对接端内，将两根钢丝软管11的对接端连接在一起。为保证钢丝软管11紧密贴合在硬管12上，硬管12的外周缠绕有纸胶带（未图示），且还涂抹有密封胶，将硬管12和钢丝软管11的对接端之间的缝隙进行密封且贴合牢固。
网纹管13包裹在两根钢丝软管11的对接端外，将两根钢丝软管11的对接端包覆在内。网纹管13预先剖开，在侧面形成一开缝，网纹管13通过开缝从钢丝软管11侧面套设其上进行包裹。网纹管13因为与钢丝软管11均为塑料等制成，两者能够紧密贴合在一起，具有足够强度的摩擦力。金属丝缠绕在网纹管13上将其箍紧在钢丝软管11上，避免网纹管13脱开。
排水管10和排水控制阀20、抽气器30等的连接为可拆卸方式，方便根据排水管10的更换、收纳等。
本发明中，抽气器30区别于常规的用电抽气机。如图1中所示，抽气器30包括抽气筒31、阀门组件、活塞（未图示）以及手柄32。抽气筒31外设置支架33对其进行支撑及结构增强；活塞设置在抽气筒31内并可沿抽气筒31上下运动；手柄32设置在抽气筒31上并连接活塞，带动活塞上下运动，实现抽气和排气。
抽气筒31上设有抽气接口34，该抽气接口34位于抽气筒31的下端处。当转动手柄32带动活塞从抽气筒31内下端向上端运动时，气体从抽气接口34进入抽气筒31内；当转动手柄32带动活塞从抽气筒31内上端向下端运动时，抽气筒31内的气体从抽气接口34排出。
抽气接口34通过阀门组件连接抽气管40。
阀门组件包括三通接头35、第一单向阀36、第二单向阀37以及球阀38。三通接头35以其中一接头连接抽气接口34上，另外两个接头分别用于连接第一单向阀36和第二单向阀37。在三通接头35的另外两个接头上，第一单向阀36水平连接在其中一接头上，防止气体通过以从抽气筒31排至抽气管40内；第二单向阀37竖向连接在另外一接头上，用于抽气筒31内气体通过排出。球阀38连接在第一单向阀36和抽气管40之间，用于控制抽气接口34的通断，隔离抽气器30和排水管10。
抽气管40优选采用抗负压塑料软管。
对应地，阀门组件还包括连接在球阀38和抽气管40之间的卡套螺纹接头39。其中，球阀38采用外牙式迷你球阀，卡套螺纹接头39为卡套转外锥螺纹接头，与球阀38螺纹连接。
抽气器30整体可固定在一底座310上，形成一个整体模块，方便抽气器30的搬运或固定安装。
进一步地，本发明的燃料水池快速排水装置还包括配合在排水管10的第二端上的连接组件50；排水管10通过连接组件50与排水控制阀20和抽气管40连接。
如图1、3所示，本实施例中，连接组件50包括连接管51和支管52，支管52连接在连接管51的侧面并与连接管51相连通。
连接管51具有相对的第一端和第二端。排水管10的第二端紧密配合在连接管51的第一端上；连接管51的该第一端为宝塔接头，利于穿进排水管10内并用铁丝紧固。连接管51和排水管10的第二端之间还缠绕有纸胶带，将两者之间的缝隙填充，实现密封。纸胶带的缝隙处涂抹有密封胶；密封胶可多次重复涂抹，以将纸胶带上的裂纹进行覆盖，并与纸胶带形成密封介质，可以完好的实现缝隙覆盖，密封效果好。
连接管52的第二端设有外螺纹511，通过螺纹配合与排水控制阀20连接。
支管52的轴向与连接管51的轴向相对垂直，用于通过卡套接头53与抽气管40连接。支管52的管径与抽气管40的管径对应设置，卡套接头53配合在支管52和抽气管40的对接处，将两者密封连接。
连接管51的侧面还设有至少一根固定支棒54；固定支棒54的轴向与连接管51的轴向相对垂直。固定支棒54的设置，利于转动连接组件50将其拧紧在排水控制阀20上，或者在转动排水控制阀20将其与连接组件50连接时，起到固定连接组件50的作用。
如图4所示，本发明第二实施例的燃料水池快速排水装置，包括排水管、排水控制阀20、抽气器30、抽气管及连接组件50。排水管及抽气管参考图1所示的排水管10和抽气管40，且排水控制阀20、抽气器30、抽气管及连接组件50各结构的连接形式参考上述图1所示第一实施例，在此不再赘述。
不同于上述第一实施例，在本实施例中，连接组件50包括轴向相接且相连通的连接管51＇和连接法兰52＇。
排水管的第二端紧密配合在连接管51＇上；连接管51＇远离连接法兰52＇的一端为宝塔接头，利于穿进排水管内。连接管51＇和排水管的第二端之间还缠绕有纸胶带，将两者之间的缝隙填充，实现密封。纸胶带的缝隙处涂抹有密封胶；密封胶可多次重复涂抹，以将纸胶带上的裂纹进行覆盖，并与纸胶带形成密封介质，可以完好的实现缝隙覆盖，密封效果好。
连接法兰52＇与排水控制阀20上的法兰21配合连接。连接管51＇靠近连接法兰52＇的一端上设有支管53＇，用于与抽气管连接，连通连接组件50和抽气管；抽气管和连接组件50的连接参考图1所示。支管53＇的管径与抽气管的管径对应设置。支管53＇通过卡套接头与抽气管40密封连接。
进一步地，本实施例的燃料水池快速排水装置还包括工装小车60。连接组件50与排水控制阀20连接成一体，排水控制阀20及抽气器30均安装在工装小车60，将以上各结构集成为一体，方便移动。
工装小车60也可由移动支架代替，实现相同的作用。
可以理解地，上述第一实施例的燃料水池快速排水装置也可包括工装小车60或移动支架，将排水控制阀20及抽气器30等集成为一体，方便移动。
本发明的燃料水池快速排水装置用于核电站中燃料水池的快速排水，参考图1及图4，通过燃料水池快速排水装置实现的燃料水池快速排水方法可包括以下步骤：
S0、将排水控制阀20置于厂房外排水渠上方，无需在燃料厂房的20米平台上或在燃料水池边；连接组件50连接在排水控制阀20上，抽气器30临近排水控制阀20布置并与连接组件50通过抽气管40连接。或者，将集成有排水控制阀20、连接组件50及抽气器30等的工装小车60或移动支架移动至厂房外排水渠上方，无需在燃料厂房的20米平台上或在燃料水池边。
排水管10的第二端连接在连接组件50上。
S1、将排水管10的第一端伸进燃料水池内并位于液面下方。
S2、在排水控制阀20处于关闭状态下，操作抽气器30，将排水管10内部的空气抽出，使燃料水池内的水进入排水管10，建立倒虹吸。
具体地，该步骤中，当排水控制阀20的初始状态处于关闭时，无需进行开关动作，直接操作抽气器30进行抽气；当排水控制阀20的初始状态处于打开时，关闭排水控制阀20操作抽气器30进行抽气。
操作抽气器30，上下摇动手柄32带动活塞上下运动。排水管10内的空气被抽进抽气筒31内，然后通过第二单向阀37排出抽气筒31至外部环境中。
当燃料水池内的水进入排水管10内并越过排水管10最高点流至排水控制阀20时，说明抽气完成。
S3、断开抽气器30和排水管10的连通，结束抽气。
其中，将阀门组件中的球阀38关闭，断开抽气器30和抽气管40的连接，即断开抽气器30和排水管10的连通。
S4、打开排水控制阀20，燃料水池内的水在虹吸效应下通过排水管10和排水控制阀20排出。
由于排水控制阀20置于厂房外排水渠上方，排出的水直接向下进入排水渠。
S5、打开除盐水贮存和分配系统（SED，Demineralized water storage and distribution system）的补水阀，为燃料水池补水，调节排水控制阀20的开度，使燃料水池的液位动态平衡，实现稳定的最大流量在线换水。
在实际应用中，以DN100PVC透明钢丝软管作为排水管10为例，摇动抽气器30的手柄32三百下后，可以将DN100PVC透明钢丝软管内的水位提升5.5米，并建立满管虹吸。在排水管10内水位提升5.5米后，使用抽气器30继续进行抽气，按压手柄32并不会显得吃力，证明杠杆长度设置合理。停止抽气后，水位不会回落到燃料水池，证明装置各点的密封性良好。
将排水控制阀20全开，虹吸排水实现了对燃料水池的快速排水，通过测量燃料水池水位在一小时内的下降高度，得出装置的平均排水速率为147 m 3/h，比SED最大补水流量108m 3/h大，可以实现燃料水池的最大流量在线换水，保证燃料水池水质长期处于合格状态，有效的解决了由于燃料水池悬浮物超标导致PTR试验无法执行的问题。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (15)

  1. 一种燃料水池快速排水装置，其特征在于，包括排水管、排水控制阀、抽气器以及抽气管；
    所述排水管的第一端用于伸进燃料水池内；所述排水控制阀连接在所述排水管的第二端上，控制所述排水管的通断或调节所述排水管的排水流量；
    所述抽气管连接在所述排水管的第二端和所述抽气器之间；所述抽气器通过所述抽气管将所述排水管内部的空气抽出，使燃料水池内的水进入排水管，建立倒虹吸。
  2. 根据权利要求1所述的燃料水池快速排水装置，其特征在于，所述排水管为钢丝软管。
  3. 根据权利要求2所述的燃料水池快速排水装置，其特征在于，所述排水管为DN100钢丝软管。
  4. 根据权利要求1所述的燃料水池快速排水装置，其特征在于，所述排水管由至少两根钢丝软管连接形成；相邻的两根所述钢丝软管的对接处设有密封连接组件；
    所述密封连接组件包括穿设在两根所述钢丝软管的对接端内的硬管、包裹在两根所述钢丝软管的对接端外的网纹管、缠绕在所述网纹管上将其箍紧在所述钢丝软管上的金属丝；
    所述硬管的外周缠绕有纸胶带并涂覆有密封胶，将所述硬管和钢丝软管的对接端之间的缝隙进行密封。
  5. 根据权利要求1所述的燃料水池快速排水装置，其特征在于，所述抽气器包括抽气筒、阀门组件、设置在所述抽气筒内并可沿所述抽气筒上下运动的活塞、设置在所述抽气筒上并连接以带动所述活塞上下运动的手柄；
    所述抽气筒上设有抽气接口，所述抽气接口通过所述阀门组件连接所述抽气管。
  6. 根据权利要求5所述的燃料水池快速排水装置，其特征在于，所述阀门组件包括三通接头、防止气体从所述抽气筒排至所述抽气管内的第一单向阀、用于所述抽气筒内气体排出的第二单向阀、用于控制所述抽气接口通断的球阀；
    所述三通接头以其中一接头连接所述抽气接口，所述第一单向阀和所述第二单向阀分别水平连接和竖向连接所述三通接头的另外两个接头上；所述球阀连接在所述第一单向阀和所述抽气管之间。
  7. 根据权利要求6所述的燃料水池快速排水装置，其特征在于，所述阀门组件还包括连接在所述球阀和所述抽气管之间的卡套螺纹接头。
  8. 根据权利要求1-7任一项所述的燃料水池快速排水装置，其特征在于，所述燃料水池快速排水装置还包括配合在所述排水管的第二端上的连接组件；所述排水管通过所述连接组件与所述排水控制阀和抽气管连接。
  9. 根据权利要求8所述的燃料水池快速排水装置，其特征在于，所述连接组件包括连接管、连接在所述连接管侧面并与其相连通的支管；
    所述排水管的第二端紧密配合在所述连接管的第一端上，所述连接管的相对的第二端通过螺纹配合与所述排水控制阀连接；
    所述支管通过卡套接头与所述抽气管连接。
  10. 根据权利要求9所述的燃料水池快速排水装置，其特征在于，所述连接管的第一端为宝塔接头。
  11. 根据权利要求9所述的燃料水池快速排水装置，其特征在于，所述连接管的侧面还设有至少一根固定支棒；所述固定支棒的轴向与所述连接管的轴向相对垂直。
  12. 根据权利要求8所述的燃料水池快速排水装置，其特征在于，所述连接组件包括轴向相接的连接管和连接法兰；
    所述排水管的第二端紧密配合在所述连接管上；所述连接法兰与所述排水控制阀上的法兰配合连接；
    所述连接管远离所述连接法兰的一端为宝塔接头；所述连接管靠近所述连接法兰的一端上设有与所述抽气管连接的支管。
  13. 根据权利要求1-7任一项所述的燃料水池快速排水装置，其特征在于，所述燃料水池快速排水装置还包括工装小车或移动支架；所述排水控制阀及抽气器均安装在所述工装小车或移动支架上。
  14. 一种燃料水池快速排水方法，其特征在于，采用权利要求1-13任一项所述的燃料水池快速排水装置，所述燃料水池快速排水方法包括以下步骤：
    S1、将排水管的第一端伸进燃料水池内并位于液面下方；
    S2、在排水控制阀处于关闭状态下，操作抽气器，将所述排水管内部的空气抽出，使燃料水池内的水进入排水管，建立倒虹吸；
    S3、断开所述抽气器和所述排水管的连通，结束抽气；
    S4、打开所述排水控制阀，所述燃料水池内的水在虹吸效应下通过所述排水管和排水控制阀排出。
  15. 根据权利要求14所述的燃料水池快速排水方法，其特征在于，所述燃料水池快速排水方法还包括以下步骤：
    S5、打开除盐水贮存和分配系统的补水阀，为所述燃料水池补水，调节所述排水控制阀的开度，使所述燃料水池的液位动态平衡。
PCT/CN2021/116594 2021-03-25 2021-09-06 燃料水池快速排水装置及燃料水池快速排水方法 WO2022198928A1 (zh)

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