Simulation operation device for water purification equipment of nuclear power station

Abstract

The utility model provides a nuclear power station water purification equipment simulation operation device, and relates to the technical field of nuclear power station operation and maintenance. The auxiliary filtering device comprises at least one filter and a bolt clamping stagnation simulation mechanism; the filter is provided with a cover body, a shell, a filter element and a threaded fastener; the bolt clamping stagnation simulation mechanism is arranged on the threaded fastener or arranged between the threaded fastener and the cover body or / and the shell so as to retard normal locking of the threaded fastener; the ion exchange device comprises a resin bed and a simulated blocking mechanism, and a feeding pipeline and a discharging pipeline are arranged on the resin bed; the simulated material blocking mechanism is arranged between the feeding pipeline or / and the discharging pipeline and the resin bed so as to change the through-flow area of the feeding pipeline or / and the discharging pipeline. The device can guide the completion of simulation operation of the water purification equipment, simulates faults such as bolt clamping stagnation and difficult feeding and discharging in the operation, facilitates the improvement of the actual operation and fault handling capabilities of operation and maintenance personnel, and improves the maintenance work efficiency.

Description

Technical Field

[0001] This application relates to the technical field of nuclear power plant operation and maintenance, and particularly to a simulation operation device for nuclear power plant water purification equipment. Background Art

[0002] The water purification equipment of a nuclear power plant generally includes an auxiliary filter and a resin bed. The auxiliary filter needs to have its filter element replaced regularly, and the resin bed needs to have its resin replaced regularly. Therefore, the maintenance operation frequency is relatively high. Since there are many devices, interfaces, and valves involved in the maintenance of the water purification equipment, the operation procedures are relatively complex and the operation is difficult. For operation and maintenance personnel with insufficient practical experience, due to the lack of intuitive understanding of the equipment and without actual operation drills, problems such as non-standard operations, inability to handle the fault phenomena during the equipment operation process, and low operation efficiency are very likely to occur during the actual operation. Content of the Utility Model

[0003] This application provides a simulation operation device for nuclear power plant water purification equipment, which has all the devices of the actual water purification equipment and can simulate common equipment faults, and can help complete the pre-job training of operation and maintenance personnel, is conducive to improving the actual operation and fault handling capabilities of operation and maintenance personnel, and improves the maintenance work efficiency.

[0004] This application provides a simulation operation device for nuclear power plant water purification equipment, which includes an auxiliary filtration device and an ion exchange device connected in sequence according to the water purification treatment steps.

[0005] The auxiliary filtration device includes at least one filter and a simulated bolt jamming mechanism. The filter has a cover body and a housing connected movably, a filter element received in the housing, and a threaded fastener for locking and fixing the cover body and the housing; the simulated bolt jamming mechanism is arranged between the threaded fastener and the cover body and the housing to block the normal locking of the threaded fastener.

[0006] The ion exchange device includes a resin bed and a simulated blockage mechanism. An inlet pipe is provided at the upper part of the resin bed, and an outlet pipe is provided at the lower part of the resin bed; the simulated blockage mechanism is arranged between the inlet pipe or / and the outlet pipe and the resin bed to change the flow area of the inlet pipe or / and the outlet pipe.

[0007] In some embodiments, the simulated bolt jamming mechanism includes a fixing hole axially penetrating through the cover body or the housing, a threaded sleeve movably disposed in the fixing hole and cooperating with the threaded fastener, a first driving member fixedly disposed on the cover body or the housing, and a first movable member at least partially movably disposed in the fixing hole. A gap is reserved between the threaded sleeve and the inner wall of the fixing hole; the first movable member is fixedly connected to the first driving member and is driven by the first driving member to movably insert into the gap so as to radially abut against the threaded sleeve and make it eccentric.

[0008] In some embodiments, one end of the first movable member movably inserted into the gap is provided with a wedge-shaped structure, and the surface of the wedge-shaped structure abutting against the threaded sleeve is a slope surface.

[0009] In some embodiments, the threaded fastener includes a swivel bolt and a nut. One end of the swivel bolt is movably hinged on the cover body or the housing. A screw rod is provided at the free end of the swivel bolt, and the nut is threadedly connected to the screw rod.

[0010] The simulated bolt jamming mechanism includes a guiding groove axially provided on the screw rod, a second driving member fixedly disposed on the swivel bolt, and a second movable member movably connected to the guiding groove. The second movable member is fixedly connected to the second driving member and at least partially protrudes radially out of the guiding groove, and is driven by the second driving member to move along the guiding groove towards the outer end of the screw rod so as to block the normal locking of the nut.

[0011] In some embodiments, the auxiliary filtering device further includes a simulated gas-liquid splashing mechanism, and the simulated gas-liquid splashing mechanism includes an air compressor and a medium storage tank; an air outlet of the air compressor is connected to a gas source inlet of the medium storage tank through an air pipeline; a medium liquid is stored in the medium storage tank, and a medium outlet of the medium storage tank is connected to a filtering cavity of the housing for accommodating the filter element through a medium output pipeline so as to introduce a gas-liquid mixed medium into the filtering cavity under a set pressure limit.

[0012] A pressure sensor for detecting the internal pressure of the filtering cavity is provided on the housing.

[0013] In some embodiments, the auxiliary filtering device further includes a filter element lifting tool and a locking control mechanism. The filter element lifting tool includes an outer pipe fitting, an inner connecting member movably disposed in the outer pipe fitting, an operating member connecting the inner connecting member, and a clamping jaw mechanism connected to the inner connecting member and / or the outer pipe fitting through a transmission structure. The inner connecting member moves relative to the outer pipe fitting under the drive of the operating member and acts on the transmission structure to control the clamping jaw mechanism to grasp or release the filter element.

[0014] The internal connecting member includes a first connecting pipe portion and a second connecting pipe portion, and at least a part of the first connecting pipe portion is movably inserted into the second connecting pipe portion; the operating member is connected to the first connecting pipe portion or the second connecting pipe portion.

[0015] The locking control mechanism is disposed between the first connecting pipe portion and the second connecting pipe portion to connect the first connecting pipe portion and the second connecting pipe portion into one body, or to disconnect the connection between the first connecting pipe portion and the second connecting pipe portion.

[0016] In some embodiments, the first connecting pipe portion includes a lower pipe portion movably inserted into the second connecting pipe portion, and the outer diameter of the lower pipe portion matches the inner diameter of the second connecting pipe portion.

[0017] The locking control mechanism includes through holes radially penetrating the side wall of the lower pipe portion and circumferentially distributed, first card slots disposed on the inner wall of the second connecting pipe portion and respectively corresponding to the through holes, a third driving member fixedly disposed in the lower pipe portion, a third movable member movably disposed in the lower pipe portion and fixedly connected to the third driving member, and positioning beads respectively movably disposed in the through holes, the diameter of the positioning beads being greater than the axial length of the through holes; the outer diameter of the third movable member matches the inner diameter of the lower pipe portion, and second card slots corresponding to the through holes are disposed on the outer wall of the third movable member.

[0018] When the third movable member is in the first position, it radially abuts against the positioning beads through its outer wall, so that at least a part of the positioning beads are caught in the corresponding first card slots; when the third movable member moves to the second position under the drive of the third driving member, the second card slots move to the corresponding through holes, so that at least a part of the positioning beads are caught in the corresponding second card slots and separated from the first card slots.

[0019] In some embodiments, the nuclear power plant water purification equipment simulation operation device further includes a control module electrically connected to the simulation bolt jamming mechanism or / and the simulation plugging mechanism or / and the simulation gas-liquid splashing mechanism or / and the locking control mechanism to control the operation of the simulation bolt jamming mechanism or / and the simulation plugging mechanism or / and the simulation gas-liquid splashing mechanism or / and the locking control mechanism through the control module.

[0020] Or it further includes a remote controller wirelessly connected to the control module, the remote controller sends a control signal to the control module, and the control module controls the operation of the simulation bolt jamming mechanism or / and the simulation plugging mechanism or / and the simulation gas-liquid splashing mechanism or / and the locking control mechanism according to the received control signal.

[0021] In some embodiments, the auxiliary filtering device includes two types of filters, namely a vertical filter and a horizontal filter, and the vertical filter and the horizontal filter are sequentially connected according to the water purification treatment steps.

[0022] In some embodiments, the simulated material blockage mechanism includes a fourth driving member and a fourth movable member movably disposed on one side of the feed pipe and / or the discharge pipe. The fourth movable member is fixedly connected to the fourth driving member and radially extends into the feed pipe and / or the discharge pipe under the drive of the fourth driving member to change the flow area of the feed pipe and / or the discharge pipe.

[0023] The nuclear power plant water purification equipment simulation operation device provided by the present application includes an auxiliary filtering device and an ion exchange device, which are the same as the actual water purification equipment of the nuclear power plant, ensuring that the structures, interfaces, valves and other positions of each device are consistent with the on-site equipment. The operation and maintenance personnel can complete all operations of the actual equipment through the simulation operation device provided by the present application. While achieving the purpose of pre-job training, it is beneficial for the operation and maintenance personnel to deeply understand the nuclear power plant water purification equipment, learn correct operations, improve the equipment maintenance operation ability, reduce the probability of equipment failures caused by misoperations during actual maintenance operations, improve the maintenance work efficiency, and avoid the problem of radiation injuries to operation and maintenance personnel caused by misoperations during inexperienced actual operations.

[0024] In addition, the nuclear power plant water purification equipment simulation operation device provided by the present application can simulate the bolt jamming failure during the process of disassembling and assembling the filter element through the simulated bolt jamming mechanism, and can simulate the resin blockage failure during the process of replacing the resin through the simulated material blockage mechanism. On the one hand, it can enable the operation and maintenance personnel to experience abnormal situations that may occur during actual operations and understand the causes of failures during the simulation operation process, deepening their understanding of the nuclear power plant water purification treatment equipment. On the other hand, it is also convenient for the operation and maintenance personnel to conduct targeted disposal operation drills for related failures, master the correct disposal methods and procedures, enable them to correctly handle the failures that occur abnormally, improve the failure disposal ability during actual operations, avoid misoperations during actual operations, and is beneficial to improving the maintenance work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, where:

[0026] Figure 1 It is a schematic diagram of the overall structure of a specific embodiment of the present application;

[0027] Figure 2Schematic diagram of a partial structure of an auxiliary filtering device according to a specific embodiment of the present application;

[0028] Figure 3 Schematic diagram of the remaining part of the structure of an auxiliary filtering device according to a specific embodiment of the present application;

[0029] Figure 4 Schematic diagram of the vertical filter structure of an auxiliary filtering device according to a specific embodiment of the present application;

[0030] Figure 5 Schematic diagram of one implementation manner of a simulated bolt jamming mechanism according to a specific embodiment of the present application;

[0031] Figure 6 Schematic diagram of the connection structure between a locking control mechanism and a filter cartridge lifting tool according to a specific embodiment of the present application;

[0032] Figure 7 Schematic diagram of another implementation manner of a simulated bolt jamming mechanism according to a specific embodiment of the present application;

[0033] Figure 8 Schematic diagram of the sectional structure of a simulated material blocking mechanism connected to the feed pipe and the discharge pipe of a resin bed respectively according to a specific embodiment of the present application;

[0034] Figure 9 Schematic block diagram of the circuit principle according to a specific embodiment of the present application. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. According to the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application. In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments. At the same time, the steps or actions in the method description can also be reordered or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for clearly describing a certain embodiment and do not mean that they are necessary sequences, unless it is stated that a certain sequence must be followed.

[0036] Please refer to Figure 1 , the present application provides a simulated operation device for nuclear power plant water purification equipment, which includes an auxiliary filtering device 100 and an ion exchange device 600 connected in sequence through a water delivery pipeline 200 according to the water purification treatment steps.

[0037] The auxiliary filtering device 100 includes at least one filter 10 and a simulated bolt jamming mechanism 20. The filter 10 has a lid 11 and a housing 12 that are movably connected, a filter element 13 housed in the housing 12, and a threaded fastener 14 that locks and fixes the lid 11 and the housing 12. The simulated bolt jamming mechanism 20 is provided between the threaded fastener 14 and the lid 11 and the housing 12 to block the normal tightening of the threaded fastener 14 through the simulated bolt jamming mechanism 20, thereby simulating the bolt jamming failure that is likely to occur during the actual operation of replacing the filter element 13 of the filter 10.

[0038] The ion exchange device 600 includes a resin bed 60 and a simulated material blockage mechanism 50. The resin bed 60 has a resin cavity (not labeled) for accommodating resin inside. An inlet pipe 61 communicating with its resin cavity is provided at the upper part of the resin bed 60, and an outlet pipe 62 communicating with its resin cavity is provided at the lower part of the resin bed 60. The simulated material blockage mechanism 50 is provided between the inlet pipe 61, the outlet pipe 62 and the resin bed 60 to change the flow area of the inlet pipe 61 and the outlet pipe 62 through the simulated material blockage mechanism 50, blocking the normal feeding or discharging of the resin, thereby simulating the resin blockage failure that is likely to occur during the operation of replacing the resin.

[0039] A filter cavity (not labeled) for accommodating the filter element 13 is provided on the housing 12 of the filter 10. The filter cavity forms a cavity opening (not labeled) at one end of the housing 12. The lid 11 is movably connected to the housing 12 through a connecting mechanism 15 and can close the cavity opening of the filter cavity in the closed state of the lid 11. The threaded fastener 14 is detachably connected between the lid 11 and the housing 12 to lock and fix the lid 11 in the closed state on the housing 12 and tightly press the cavity opening, realizing strict sealing of the filter cavity. When replacing the filter element 13, it is first necessary to remove the threaded fastener 14, open the lid 11, replace the filter element 13 through the cavity opening, and then close the lid 11 and lock the threaded fastener 14 to ensure the sealing of the filter cavity.

[0040] However, during the actual operation process, due to component processing problems or improper operation methods, bolt jamming failures often occur when disassembling and assembling the threaded fastener 14, resulting in problems such as the lid 11 being unable to be opened or not being able to be tightly pressed and closed. For the bolt jamming failure that occurs during the operation process, if it is not handled in a timely manner and improperly, it will seriously affect the maintenance operation progress of the filter 10 and delay production.

[0041] Please refer to Figure 8, at the upper part of the resin bed 60 of the ion exchange device 600, there is a resin bed water inlet 63 for water inlet that is connected to its resin cavity. At the bottom of the resin bed 60, there are respectively a resin bed water outlet 64 and a resin backwash port 65 that are connected to its resin cavity. The water filtered by the filter 10 is sent to the resin bed water inlet 63 through the water delivery pipeline 200 and flows downward through the resin layer in the resin cavity. After removing the ionic impurities in the water, the purified water is discharged through the resin bed water outlet 64. When replacing the resin, first press the backwash water into the resin cavity from the resin backwash port 65 to loosen the resin layer in the resin bed 60 and disperse the old resin. Under the action of air pressure, the dispersed old resin is first discharged through the discharge pipeline 62, and then new resin is loaded into the resin cavity through the feed pipeline 61.

[0042] However, in the actual operation process, due to insufficient exhaust volume, the resin loading from the feed pipeline 61 is often slow, and there may even be a problem that the resin cannot be loaded. Also due to insufficient exhaust, the resin discharge from the discharge pipeline 62 is slow, and there may even be a problem that the resin cannot be discharged. For the resin blockage failure that occurs during the operation process, if it is not handled in time and improperly, it will seriously affect the maintenance operation progress of the resin bed 60 and delay production.

[0043] The nuclear power plant water purification equipment simulation operation device provided by the present application is the same as the actual water purification equipment in the nuclear power plant on the main equipment, ensuring that the structures, interfaces, valves and other positions of each equipment are consistent with the on-site equipment. The operation and maintenance personnel can complete all the operations of the actual equipment through the simulation operation device provided by the present application. While achieving the purpose of pre-job training, it is beneficial for the operation and maintenance personnel to deeply understand the nuclear power plant water purification equipment, learn the correct operation, improve the equipment maintenance operation ability, reduce the probability of equipment failure caused by misoperation during the actual maintenance operation process, improve the maintenance work efficiency, and avoid the problem that the operation and maintenance personnel are irradiated due to misoperation during inexperienced actual operation.

[0044] In addition, the nuclear power plant water purification equipment simulation operation device provided by the present application can simulate the bolt jamming failure during the process of disassembling and assembling the filter element 13 through the simulated bolt jamming mechanism 20, and can simulate the resin blockage failure during the resin replacement process through the simulated blockage mechanism 50. On the one hand, it can enable the operation and maintenance personnel to experience the abnormal situations that may occur during the actual operation process and understand the causes of the failures during the simulation operation process, so as to deepen the understanding of the nuclear power plant water purification treatment equipment. On the other hand, it is also convenient for the operation and maintenance personnel to conduct targeted disposal operation drills for relevant failures, master the correct disposal methods and procedures, enable them to correctly handle the failures that occur abnormally, improve the failure disposal ability during the actual operation, avoid misoperation during the actual operation, and is beneficial to improving the maintenance work efficiency.

[0045] Please refer to Figures 1 to 3, in some embodiments, the auxiliary filtering device 100 includes two types of filters 10, namely a vertical filter 101 and a horizontal filter 102. The vertical filter 101 is preferably installed in the sump of the nuclear power plant, and the horizontal filter 102 is preferably installed on the foundation of the nuclear power plant. The two are sequentially connected through a water pipeline 200 in the order of the nuclear power plant water purification treatment steps.

[0046] Please refer to Figure 2 and Figure 4 , for the vertical filter 101, it has a first cover 111 and a first housing 121 connected movably, a first filter element 131 housed in the first housing 121. The threaded fastener 14 includes a fastening bolt 141 for locking and fixing the first cover 111 and the first housing 121, and the connecting mechanism 15 includes an opening cover gearbox 151 for movably connecting the first cover 111 and the first housing 121.

[0047] Since the vertical filter 101 is installed in the sump of the nuclear power plant, when performing on-site maintenance operations, personnel need to stand at a high place and remotely operate the vertical filter 101 through a remote operation auxiliary tool (not labeled). For this reason, the auxiliary filtering device 100 provided in this application is preferably equipped with a vertical filter workbench 16 for fixing the vertical filter 101 and providing a high-altitude operation platform for equipment operation and maintenance personnel, a remote opening tool (not shown in the figure) for remotely operating and controlling the disassembly and assembly of the fastening bolt 141 of the vertical filter 101 and the opening and closing of the first cover 111, and a filter element hoisting tool 17 for remotely operating and controlling the hoisting and transfer of the first filter element 131 (as Figure 1 shown).

[0048] The remote opening tool is a common remote operation auxiliary tool for the vertical filter 101 in the sump of the nuclear power plant. Existing products can be used, and this application does not make any limitations in this regard, nor will it be specifically introduced below. Both the remote opening tool and the filter element hoisting tool 17 are movably installed on the vertical filter workbench 16 and can move in the X-axis, Y-axis, and Z-axis directions relative to the vertical filter workbench 16.

[0049] The first housing 121 of the vertical filter 101 is vertically installed on the working bench 16 of the vertical filter. The cavity opening of its filtering cavity is arranged upward. The first filter element 131 can be vertically installed into or lifted out of the filtering cavity through the cavity opening by hoisting. There is a first platform 161 above the first housing 121 on the working bench 16 of the vertical filter. During simulation operation training, the operation and maintenance personnel can stand on the first platform 161, disassemble and assemble the fastening bolts 141 through the remote opening tool and operate the cover opening gearbox 151, so as to remotely control the opening and closing of the first cover 111. At the same time, the operation and maintenance personnel can also stand on the first platform 161, hoist and transfer the old first filter element 131 and install the new first filter element 131 through the filter element hoisting tool 17 to complete the filter element replacement operation of the vertical filter 101.

[0050] Please refer to Figure 4 , Preferably, a first connecting flange 1211 is provided on the first housing 121 around the cavity opening of the filtering cavity. A second connecting flange 1111 matching with the first connecting flange 1211 is provided on the outer periphery of the first cover 111. The fastening bolts 141 are detachably connected to the first connecting flange 1211 and the second connecting flange 1111 through corresponding flange holes (not marked) to lock and fix the first cover 111 and the first housing 121.

[0051] Please refer to Figure 5 , In some embodiments, for the vertical filter 101, the simulated bolt jamming mechanism 20 includes a fixing hole 21 axially penetrating through the first connecting flange 1211, a threaded sleeve 22 movably arranged in the fixing hole 21, a first driving member 23 fixedly arranged on the first housing 121, and a first movable member 24 at least partially movably located in the fixing hole 21. Preferably, the fixing hole 21 is the flange hole originally provided on the first connecting flange 1211 without additional setting.

[0052] The screw opening of the threaded sleeve 22 is arranged towards the corresponding flange hole on the second connecting flange 1111, and preferably there is a certain gap between the upper end of the threaded sleeve 22 and the fixing hole 21. The threaded sleeve 22 can be threadedly connected with the fastening bolt 141 through its screw opening, and there is a gap (not marked) between the lower part of the threaded sleeve 22 far from its screw opening and the inner wall of the fixing hole 21, so that the threaded sleeve 22 can move axially and swing radially relative to the axis of the fixing hole 21 within a certain limit. Under normal conditions, the threaded sleeve 22 is movably connected with the fixing hole 21 coaxially.

[0053] The first driving member 23 is preferably set as an electric push rod, fixedly installed on the outer wall of the first housing 121, and its action end is axially corresponding to the lower part of the fixing hole 21. The lower end of the first movable member 24 is fixedly connected to the action end of the first driving member 23, and the upper end of the first movable member 24 extends upward into the fixing hole 21.

[0054] Preferably, in the initial state, the actuating end of the first driving member 23 retracts, and the upper end of the first movable member 24 is located below the threaded sleeve 22 and does not contact the threaded sleeve 22; or in the initial state, the upper end of the first movable member 24 may contact the threaded sleeve 22, but does not damage the coaxial movable connection state between the threaded sleeve 22 and the fixing hole 21, enabling equipment maintenance personnel to perform normal simulation operation training for replacing the filter element 13 of the vertical filter 101.

[0055] When it is necessary to simulate a bolt jamming fault, the actuating end of the first driving member 23 extends under electric drive and drives the first movable member 24 to movably insert into the gap formed between the inner wall of the threaded sleeve 22 and the fixing hole 21 from the lower part of the threaded sleeve 22, so that during the upward axial movement of the first movable member 24, the threaded sleeve 22 is radially abutted and deviated from the center line of the fixing hole 21 to create an eccentric phenomenon of the threaded hole artificially. In this state, when the fastening bolt 141 is tightened, the tightening torque of the fastening bolt 141 increases significantly and is not easy to screw, thereby simulating the bolt jamming fault caused by the eccentricity of the threaded fastener 14, facilitating maintenance personnel to perform targeted simulation disposal operation training for this fault and improving the fault disposal ability of maintenance personnel in on-site practical operation.

[0056] Please refer to Figure 5 , preferably, the upper end portion of the gap where the first movable member 24 movably inserts into the lower part of the threaded sleeve 22 and the inner wall of the fixing hole 21 is provided with a wedge-shaped structure, and the surface of its wedge-shaped structure abutting against the threaded sleeve 22 is the first slope surface 241. When the first movable member 24 is driven by the first driving member 23 and moves upward along the fixing hole 21, the lower outer wall of the threaded sleeve 22 can be radially abutted through the first slope surface 241 of its wedge-shaped structure, ensuring that the threaded sleeve 22 can eccentrically move relative to the center line of the fixing hole 21 to artificially create the problem of eccentric threaded holes. In addition, this design can adjust the depth of the wedge-shaped structure at the upper end of the first movable member 24 inserted into the gap by controlling the extension degree of the actuating end of the first driving member 23, thereby controlling the eccentricity degree of the threaded sleeve 22 and realizing the controllable adjustment of the eccentricity degree of the threaded sleeve 22, facilitating maintenance personnel to perform targeted disposal operation training for different eccentricity degrees of the threaded fastener 14.

[0057] Preferably, for the wedge-shaped structure at the upper end of the first movable member 24, the surface that movably abuts against the inner wall of the fixing hole 21 is set as an arc surface (not shown in the figure) that fits the inner wall of the fixing hole 21, enabling the first movable member 24 to better fit the inner wall of the fixing hole 21 and improving the stability of the reciprocating axial movement of the first movable member 24 along the fixing hole 21.

[0058] Understandably, in some other embodiments, the fixing hole 21 may also be a flange hole provided on the second connecting flange 1111. The threaded sleeve 22 is movably disposed in the corresponding flange hole of the first cover body 111, and the screw port of the threaded sleeve 22 is arranged towards the flange hole of the first connecting flange 1211. The first driving member 23 is fixedly connected to the first cover body 111. The lower end of the first movable member 24 having a wedge-shaped structure is movably located in the fixing hole 21, and the upper end of the first movable member 24 is fixedly connected to the acting end of the first driving member 23.

[0059] Understandably, for the vertical filter 101, the simulated bolt jamming mechanism 20 can be provided in only one set, that is, one of the flange holes of the first connecting flange 1211 or the second connecting flange 1111 is used as the fixing hole 21, and the threaded sleeve 22 and the first movable member 24 are movably arranged in the fixing hole 21, and cooperate with the first driving member 23 and the fastening bolt 141 to simulate the bolt jamming failure caused by eccentricity. In addition, multiple sets of the simulated bolt jamming mechanism 20 can also be provided, that is, multiple flange holes of the first connecting flange 1211 or the second connecting flange 1111 can be used as the fixing holes 21, and the threaded sleeve 22 and the first movable member 24 are movably arranged in each fixing hole 21, and cooperate with the first driving member 23 and the fastening bolt 141 to simulate the bolt jamming failure caused by eccentricity. The user can set it accordingly according to actual usage requirements, and the present application does not limit this.

[0060] For the vertical filter 101, during actual maintenance operations, due to the incomplete closing of the isolation valve (not labeled) of the relevant gas and liquid pipelines, incomplete pressure relief of the filter chamber, incorrect operations, etc., when the fastening bolt 141 is loosened, the high-pressure gas and liquid inside the filter chamber will spray out through the gap between the first cover body 111 and the first housing 121, resulting in the faults of the filter 10 jetting air and leaking water. For maintenance personnel with insufficient practical experience, this sudden fault is extremely likely to cause panic, resulting in incorrect fault handling operations or even being unable to handle the fault at all, which not only seriously affects the progress of equipment maintenance work but may also cause personal injuries.

[0061] Please refer to Figure 1 and Figure 2 , in some embodiments, in view of the problem that during the maintenance operation of the filter 10, it is easy for the operating personnel to handle improperly and get injured due to the faults of jetting air and leaking water, the auxiliary filtering device 100 of the present application is provided with a simulated gas-liquid spraying mechanism 30 for simulating this fault phenomenon.

[0062] The simulated gas-liquid splashing mechanism 30 is connected to the filtration chamber of the vertical filter 101 through a medium output pipeline 321. The simulated gas-liquid splashing mechanism 30 introduces a gas-liquid mixed medium into the sealed filtration chamber of the vertical filter 101 through the medium output pipeline 321 under a set pressure limit, so that when the fastening bolt 141 is disassembled, the gas-liquid mixed medium in the filtration chamber can splash outwards from the gap between the first cover body 111 and the first shell body 121 under the action of pressure, simulating the air jet and water leakage faults of the filter during the filter element replacement process.

[0063] The simulated gas-liquid splashing mechanism 30 includes an air compressor 31 and a medium storage tank 32. The compressed air outlet (not marked) of the air compressor 31 is connected to the gas source inlet (not marked) of the medium storage tank 32 through an air pipeline 311. The medium storage tank 32 stores a medium liquid, and the medium outlet (not marked) of the medium storage tank 32 is connected to the filtration chamber of the vertical filter 101 through a medium output pipeline 321. To ensure the safety of the simulated operation, the medium liquid in the medium storage tank 32 is preferably clean water.

[0064] A pressure sensor 18 for detecting the internal pressure of its filtration chamber is provided on the first shell body 121 of the vertical filter 101 (as Figure 4 shown).

[0065] Preferably, in the initial state, the simulated gas-liquid splashing mechanism 30 does not work, so that equipment operation and maintenance personnel can perform normal filter element 13 replacement simulation operation training on the vertical filter 101.

[0066] When it is necessary to simulate the gas-liquid splashing fault of the vertical filter 101, before disassembling the fastening bolt 141, first start the air compressor 31 to run, send the compressed air through the air pipeline 311 to the gas source inlet of the medium storage tank 32, so as to use the kinetic energy of the compressed air to press the clean water and part of the air in the medium storage tank 32 into the filtration chamber of the vertical filter 101 through the medium output pipeline 321. During this process, the pressure sensor 18 monitors the pressure change in the filtration chamber of the vertical filter 101 in real time, so as to stop the air compressor 31 in time and stop pressing water and air into the filtration chamber of the vertical filter 101 after the pressure value in the filtration chamber reaches the set pressure limit. The set pressure limit is preferably the same as or close to the working pressure when the actual vertical filter 101 is running, so as to simulate the internal pressure state under the running state of the filter 10.

[0067] When the operation and maintenance personnel disassemble the fastening bolt 141 in this state, once the first cover body 111 is loosened, the water and air in the filtration chamber will splash outwards from the gap between the first cover body 111 and the first shell body 121 under the action of pressure, thus simulating the air jet and water leakage faults of the filter 10 during the actual operation process, facilitating the operation and maintenance personnel to conduct targeted simulation disposal operation training for this fault, and improving the fault disposal ability of the operation and maintenance personnel in on-site practical operation.

[0068] Preferably, an isolation valve (not shown in the figure) can be provided on the medium output pipeline 321 or / and the gas transmission pipeline 311, which can prevent the high-pressure gas-liquid mixed medium from flowing back to the simulated gas-liquid spraying mechanism 30 through the medium output pipeline 321 during the process of the simulated gas-liquid spraying mechanism 30 injecting the gas-liquid mixed medium into the filtration chamber of the vertical filter 101, thus providing higher safety.

[0069] For the vertical filter 101, during actual maintenance operations, the old filter element 13 may accidentally fall off the filter element lifting tool 17 when the filter element lifting tool 17 fails to firmly grasp the filter element during the process of grasping the old filter element 13 or installing a new filter element 13. For maintenance personnel with insufficient practical experience, this sudden failure can easily cause panic, resulting in incorrect fault handling operations or even an inability to handle the fault at all, which not only seriously affects the progress of equipment maintenance work but may also cause personal injuries.

[0070] Please refer to Figure 1 、 Figure 2 and Figure 6 , in some embodiments, in response to the problem that the accidental dropping of the filter element 13 may lead to improper handling and injury of the operator, the auxiliary filtration device 100 of the present application is provided with a locking control mechanism 40 for simulating this fault phenomenon.

[0071] The filter element lifting tool 17 includes an outer pipe fitting 171, an inner connecting member (not labeled) movably disposed in the outer pipe fitting 171, an operating member 172 connected to the inner connecting member, and a jaw mechanism (not shown in the figure) connected to the inner connecting member or / and the outer pipe fitting 171 through a transmission structure 173. The inner connecting member rotates axially or circumferentially relative to the outer pipe fitting 171 under the drive of the operating member 172 and acts on the transmission structure 173 to control the jaw mechanism to grasp or release the filter element 13.

[0072] The filter element lifting tool 17 is a common remote operation auxiliary tool for the vertical filter 101 in the nuclear power plant pit. The opening and closing driving forms of its jaw mechanism are diverse, but all are to control the inner connecting member to move axially or rotate circumferentially relative to the outer pipe fitting 171 through the operating member 172, thereby acting on the transmission structure 173 and controlling the opening and closing of the jaw mechanism. The present application does not limit the opening and closing driving form of the jaw mechanism, and this part of the structure can adopt the existing design and will not be specifically introduced below. The main differences between the filter element lifting tool 17 of the present application and the existing design will be described below.

[0073] Please refer to Figure 6 , the inner connecting member includes a first connecting pipe portion 174 and a second connecting pipe portion 175, and at least a part of the first connecting pipe portion 174 is movably inserted into the second connecting pipe portion 175. The operating member 172 is a rod-shaped handle, which is horizontally and fixedly connected to the first connecting pipe portion 174.

[0074] The locking control mechanism 40 is provided between the first connecting pipe portion 174 and the second connecting pipe portion 175 to connect the first connecting pipe portion 174 and the second connecting pipe portion 175 as a whole or to disconnect the connection between the first connecting pipe portion 174 and the second connecting pipe portion 175.

[0075] Preferably, the outer pipe fitting 171 is a hollow cylindrical tubular structure penetrating up and down. The inner diameter in the middle thereof increases to form an accommodation cavity 1711 communicating with the upper and lower ends thereof. The first connecting pipe portion 174 and the second connecting pipe portion 175 of the inner connecting member are both accommodated in the accommodation cavity 1711 of the outer pipe fitting 171. The first connecting pipe portion 174 is movably located in the upper part of the accommodation cavity 1711, and the second connecting pipe portion 175 is movably located in the lower part of the accommodation cavity 1711. And the two can move axially and rotate circumferentially relative to the accommodation cavity 1711. Both the first connecting pipe portion 174 and the second connecting pipe portion 175 are arranged as hollow cylindrical structures, and an opening is provided at one end of the second connecting pipe portion 175 facing the first connecting pipe portion 174 for the lower end of the first connecting pipe portion 174 to be movably inserted.

[0076] The inner connecting member further includes an upper connecting rod 176 axially and fixedly connected to the upper end of the first connecting pipe portion 174 and a lower connecting rod 177 axially and fixedly connected to the lower end of the second connecting pipe portion 175. The upper connecting rod 176 extends to the outside of the upper end of the outer pipe fitting 171 through the top opening of the accommodation cavity 1711 and is fixedly connected to the operating member 172. The lower connecting rod 177 extends to the outside of the lower end of the outer pipe fitting 171 through the bottom opening of the accommodation cavity 1711 and is in transmission connection with the jaw mechanism through a transmission structure 173.

[0077] For the filter element lifting tool 17, only when the first connecting pipe portion 174 and the second connecting pipe portion 175 are connected as a whole can the maintenance personnel control the movement of the inner connecting member relative to the outer pipe fitting 171 through the operating member 172 and act on the transmission structure 173, so as to control the jaw mechanism to grab or release the filter element 13. If the first connecting pipe portion 174 and the second connecting pipe portion 175 are in a disconnected state, by operating the operating member 172, only the upper half of the inner connecting member, that is, the upper connecting rod 176 and the first connecting pipe portion 174, can be driven to move relative to the outer pipe portion, and the second connecting pipe portion 175 and the lower connecting rod 177 cannot be directly driven to move together by the operating member 172 and act on the transmission structure 173, and thus the opening and closing action control of the jaw mechanism cannot be realized.

[0078] Please refer to Figure 6 , in some embodiments, the first connecting pipe portion 174 includes a lower pipe portion 1741 movably inserted into the second connecting pipe portion 175. The outer diameter of the lower pipe portion 1741 matches the inner diameter of the second connecting pipe portion 175, ensuring that the lower pipe portion 1741 can stably move axially relative to the second connecting pipe portion 175.

[0079] The locking control mechanism 40 includes a through hole 41 which radially penetrates the side wall of the lower tube portion 1741 and is distributed circumferentially, a first slot 42 which is arranged on the inner wall of the second connecting tube portion 175 and corresponds to the inside and outside of the through hole 41 respectively, a third driving member 43 which is fixed in the lower tube portion 1741, a third movable member 44 which is movably located in the lower tube portion 1741 and fixedly connected to the third driving member 43, and positioning beads 45 which are movably located in the through hole 41 respectively, wherein the diameter of the positioning beads 45 is larger than the axial length of the through hole 41 so that the positioning beads 45 can at least partially extend out of the through hole 41.

[0080] The outer diameter of the third movable member 44 matches the inner diameter of the lower tube portion 1741 , and the outer wall of the third movable member 44 is provided with second slots 46 corresponding to the inner and outer sides of the through hole 41 .

[0081] When the third movable part 44 is in the first position (low position), the outer wall thereof radially abuts against the positioning beads 45 so that the positioning beads 45 are at least partially inserted into the corresponding first slots 42. The first connecting tube portion 174 and the second connecting tube portion 175 are fixed together as a whole through the positioning beads 45, thereby locking the internal connecting part, so that the operator can control the opening and closing action of the clamping mechanism through the operating part 172.

[0082] When the third movable member 44 moves to the second position (high position) driven by the third driving member 43, the second slot 46 moves to the corresponding through hole 41, so that the positioning bead 45 is at least partially inserted into the corresponding second slot 46 and disengaged from the first slot 42, thereby releasing the locking state of the first connecting tube portion 174 and the second connecting tube portion 175 and disconnecting the connection between the two.

[0083] Preferably, the opening and closing drive mode of the clamping mechanism of the filter element lifting tool 17 is set as follows: when the locking control mechanism 40 locks and connects the first connecting pipe part 174 and the second connecting pipe part 175 as a whole through the positioning beads 45, the inner connecting part is rotated by the operating part 172 to make it rotate compared with the outer pipe part 171, and act on the transmission structure 173, so as to control the clamping mechanism to grab the first filter element 131 of the vertical filter 101, so as to facilitate the operation and maintenance personnel to normally lift and transport the filter element 13 through the filter element lifting tool 17 during the simulated operation.

[0084] When the locking control mechanism 40 releases the locking state of the first connecting pipe portion 174 and the second connecting pipe portion 175, the lower half of the internal connecting piece moves to its reset position under the action of gravity, and controls the clamping mechanism to open automatically through the transmission structure 173, thereby simulating the failure of the filter element 13 accidentally falling during the lifting process of the filter element 13, so as to facilitate the operation and maintenance personnel to conduct targeted simulation handling operation training for this failure, and enhance the operation and maintenance personnel's on-site practical fault handling capabilities.

[0085] Please refer to Figure 6 , in some embodiments, a return spring 47 is provided between the bottom surface of the lower pipe portion 1741 and the second connecting pipe portion 175. The return spring 47 is a compression spring, and when the third moving member 44 is in the first position, the return spring 47 is compressed and stores energy. During the axial extension of the action end of the third driving member 43, the return spring 47 exerts a reverse elastic force on the second connecting pipe portion 175, which can cause the second connecting pipe portion 175 to axially move downward relative to the first connecting pipe portion 174, ensuring that the second connecting pipe portion 175 can be completely disconnected from the first connecting pipe portion 174.

[0086] Please refer to Figure 1 and Figure 3 , in some embodiments, for the horizontal filter 102, it has a second cover body 112 and a second housing 122 that are movably connected, and a second filter element 132 housed in the second housing 122. The threaded fastener 14 includes a turnbuckle bolt 142 and a nut 143 that lock and fix the second cover body 112 and the second housing 122, and the connecting mechanism 15 includes a hinge mechanism 152 that movably connects the second cover body 112 and the second housing 122.

[0087] Preferably, the connecting end of the turnbuckle bolt 142 is movably hinged on the second housing 122, and an axially extending screw 1421 (as shown in Figure 7 ) is provided at the free end of the turnbuckle bolt 142, and the nut 143 is threadedly connected to the screw 1421 of the corresponding turnbuckle bolt 142.

[0088] The turnbuckle bolts 142 and the nuts 143 are preferably provided in three or more groups to ensure that the second cover body 112 and the second housing 122 can be locked and fixed by multiple groups of turnbuckle bolts 142 and nuts 143.

[0089] Correspondingly, a plurality of positioning grooves 1121 respectively cooperating with the screws 1421 of the respective turnbuckle bolts 142 are axially penetrated through the periphery of the second cover body 112, and each positioning groove 1121 forms a notch (not labeled) on the radial side wall of the second cover body 112. During simulation operation, after the second cover body 112 is closed on the second housing 122 and closes the cavity opening of its filter cavity, the free ends of the respective turnbuckle bolts 142 are rotated toward the side of the positioning grooves 1121, and the screws 1421 thereof can be snapped into the corresponding positioning grooves 1121 through the notches. The length of the screws 1421 should ensure that at least a part of them axially extends out of the positioning grooves 1121 to cooperate with the corresponding nuts 143 for locking, so as to lock and fix the second cover body 112 on the second housing 122.

[0090] For the horizontal filter 102, it is fixedly installed on the nuclear power plant foundation in a horizontal posture through the horizontal filter bracket 19. Generally, high-altitude operations are not required during on-site maintenance work. Moreover, since its second filter element 132 is installed in a horizontal posture, the filter element 13 cannot be replaced in the vertical direction with the aid of a filter element lifting tool. Therefore, for such filters 10, it may not be necessary to simulate the filter element dropping failure.

[0091] Please refer to Figure 7 , in some embodiments, for the horizontal filter 102, the simulated bolt jamming mechanism 20 includes a guiding groove 25 axially provided on the screw 1421, a second driving member 26 fixedly provided on the articulated bolt 142, and a second movable member 27 movably connected to the guiding groove 25. The second movable member 27 is fixedly connected to the second driving member 26 and at least partially protrudes radially out of the guiding groove 25, and is driven by the second driving member 26 to move along the guiding groove 25 towards the outer end of the screw 1421 to block the normal connection and locking of the nut 143 to the screw 1421, thereby simulating the bolt jamming failure that is likely to occur during the actual operation of replacing the second filter element 132 of the horizontal filter 102.

[0092] The second driving member 26 is preferably arranged as an electric push rod, fixedly installed on the articulated bolt 142, and its operating end is axially corresponding to the rear part of the guiding groove 25 away from the outer end of the screw 1421. The rear end of the second movable member 27 is fixedly connected to the operating end of the second driving member 26, and the front end of the second movable member 27 extends along the guiding groove 25 towards the outer end of the screw 1421. In order to reduce the space occupancy rate, a cavity (not marked) for accommodating the second driving member 26 is provided inside the articulated bolt 142, and the cavity inside the articulated bolt 142 communicates with the guiding groove 25. The second driving member 26 is axially fixedly connected in the cavity of the articulated bolt 142, and the operating end of the second driving member 26 is fixedly connected to the second movable member 27 through the guiding groove 25.

[0093] The second movable member 27 is preferably arranged as a strip-shaped structure, the width of which matches the slot width of the guiding groove 25, and the thickness of its front end is greater than the slot depth of the guiding groove 25 to ensure that at least part of the front end of the second movable member 27 radially protrudes out of the guiding groove 25.

[0094] Preferably, in the initial state, the operating end of the second driving member 26 retracts, and the front end of the second movable member 27 is away from the outer end of the screw 1421. When the screw 1421 at the free end of the eye bolt 142 is snapped into the corresponding positioning groove 1121 in this state, the front end of the second movable member 27 will not axially protrude outside the positioning groove 1121, ensuring that the second movable member 27 will not interfere with the normal tightening of the nut 143 on the screw 1421, enabling the equipment operation and maintenance personnel to lock and fix the second cover 112 and the second housing 122 through the eye bolt 142 and the corresponding nut 143, and completing the simulation operation training for replacing the filter element 13 of the horizontal filter 102.

[0095] When it is necessary to simulate the bolt jamming fault, the operating end of the second driving member 26 extends under the electric drive and drives the second movable member 27 to move along the guide groove 25 towards the outer end of the screw 1421, so that the front end of the second movable member 27 can move to the position where the screw 1421 is normally connected to the nut 143. When the nut 143 is tightened in this state, the thread profile inside the nut 143 will be damaged due to the part of the front end of the second movable member 27 protruding radially from the guide groove 25, resulting in the discontinuity of the threads of the nut 143, artificially creating the phenomenon of thread slipping. The tightening torque of the nut 143 increases significantly and it is not easy to screw, facilitating the operation and maintenance personnel to conduct targeted simulation disposal operation training for this fault and improving the fault disposal ability of the operation and maintenance personnel in on-site practical operation.

[0096] Please refer to Figure 7 , preferably, the front end portion of the second movable member 27 facing the outer end of the screw 1421 is provided with a wedge-shaped structure, and the surface of its wedge-shaped structure protruding radially from the guide groove 25 is the second slope surface 271, so that the wedge-shaped structure at the front end of the second movable member 27 can at least partially insert into the screw opening of the nut 143 along the guide groove 25 and at least partially be stuck outside the screw opening of the nut 143. Thus, during the process of tightening the nut 143, the thread profile and thread continuity of the nut 143 are damaged through the second slope surface 271 of the wedge-shaped structure at its front end, artificially creating the phenomenon of thread slipping. In addition, this design of the second movable member 27 can adjust the depth of the second slope surface 271 of the wedge-shaped structure at the front end of the second movable member 27 inserted into the screw opening of the nut 143 by controlling the extension degree of the operating end of the second driving member 26, thereby controlling the degree of thread slipping of the nut 143 and realizing the controllable adjustment of the degree of thread slipping, facilitating the operation and maintenance personnel to conduct targeted disposal operation training for different degrees of thread slipping of the threaded fastener 14.

[0097] Understandably, for the horizontal filter 102, the simulated bolt jamming mechanism 20 can be provided with only one set, that is, the guiding groove 25, the second driving member 26, and the second movable member 27 are provided only on one of the articulated bolts 142 of the horizontal filter 102, and only this set of articulated bolts 142 and nuts 143 are used to simulate the bolt jamming failure caused by thread slipping. Additionally, the simulated bolt jamming mechanism 20 can also be provided with multiple sets, that is, the guiding groove 25, the second driving member 26, and the second movable member 27 can be provided on multiple articulated bolts 142 of the horizontal filter 102, and the bolt jamming failure caused by thread slipping is simulated through multiple sets of articulated bolts 142 and nuts 143. Users can set accordingly according to actual usage requirements, and the present application does not limit this.

[0098] Please refer to Figure 3 and Figure 4 , in some embodiments, a first water inlet 1212 and a first water outlet 1213 communicating with its filtration chamber are provided on the first housing 121 of the vertical filter 101, and a second water inlet 1221 and a second water outlet 1222 communicating with its filtration chamber are provided on the second housing 122 of the horizontal filter 102.

[0099] The water to be purified is sent to the first water inlet 1212 through the water delivery pipeline 200, discharged from the first water outlet 1213 after being filtered by the first filter element 131 at the primary level, and sent to the second water inlet 1221 through the water delivery pipeline 200. After being filtered by the second filter element 132 at the secondary level, it is then discharged from the second water outlet 1222, and sent to the resin bed water inlet 63 through the water delivery pipeline 200 and flows downward through the resin layer in the resin chamber. After removing the ionic impurities in the water, the purified water is discharged from the resin bed water outlet 64. The device of the present application can thoroughly remove the impurities and pollutants in the water through two-stage filtration treatment and one-stage ion exchange treatment, and has a good purification treatment effect.

[0100] Understandably, the number of each type of filter provided in the device of the present application can be set accordingly according to the actual requirements of water purification treatment. For example, multiple vertical filters can be connected in series to form a primary filter group, multiple horizontal filters can be connected in series to form a secondary filter group, and then the primary filter group and the secondary filter group are connected in series through the water delivery pipeline 200, so as to improve the water purification treatment capacity of the auxiliary filtration device.

[0101] Please refer to Figure 8, in some embodiments, the simulated material blocking mechanism 50 includes a fourth driving member 51 and a fourth moving member 52. There are two fourth driving members 51, which are respectively radially fixed on one side of the feed pipe 61 and the discharge pipe 62, and the action ends of the fourth driving members 51 respectively face the corresponding feed pipe 61 or discharge pipe 62. There are two fourth moving members 52, which are respectively fixedly connected to the action ends of the corresponding fourth driving members 51, and radially extend into the corresponding feed pipe 61 or discharge pipe 62 respectively under the drive of the fourth driving member 51 to change the flow area of the feed pipe 61 or the discharge pipe 62, thereby blocking the feeding of new resin or blocking the discharge of old resin.

[0102] Preferably, the simulated material blocking mechanism 50 further includes two fixed pipe fittings 53 which are respectively radially fixedly connected to one side of the feed pipe 61 and the discharge pipe 62 through connecting branch pipes 531, and the fixed pipe fittings 53 are communicated with the corresponding feed pipe 61 or discharge pipe 62 through the connecting branch pipes 531.

[0103] The fourth moving member 52 is axially movably connected in the corresponding connecting branch pipe 531, and the fourth moving member 52 is arranged in a columnar structure with an outer diameter matching the inner diameter of the corresponding connecting branch pipe 531. At least one sealing ring 54 is circumferentially arranged on the inner wall of the end of the connecting branch pipe 531 close to the feed pipe 61 or the discharge pipe 62 to seal the gap between the connecting branch pipe 531 and the fourth moving member 52 through the sealing ring 54, and prevent the resin in the feed pipe 61 or the discharge pipe 62 from leaking into the fixed pipe fitting 53 through the gap between the fourth moving member 52 and the connecting branch pipe 531.

[0104] Preferably, the fourth driving member 51 is arranged as an electric push rod, which is fixedly connected in the inner cavity of the fixed pipe fitting 53, and its action end is axially corresponding to the outside of the connecting branch pipe 531. The rear end of the fourth moving member 52 is fixedly connected to the action end of the fourth moving member 52, and the front end of the first moving member 24 extends into the corresponding feed pipe 61 or discharge pipe 62 through the connecting branch pipe 531.

[0105] Preferably, in the initial state, the action end of the fourth driving member 51 retracts, and the front end of the fourth moving member 52 completely withdraws from the corresponding feed pipe 61 or discharge pipe 62, without affecting the flow area of the feed pipe 61 or the discharge pipe 62, so as to ensure that the resin bed 60 can be normally filled with new resin through the feed pipe 61 and the old resin can be normally discharged through the discharge pipe 62, enabling the equipment operation and maintenance personnel to carry out normal resin replacement simulation operation training on the resin bed 60.

[0106] When it is necessary to simulate the resin plugging failure, the operating end of the fourth driving member 51 axially extends under electric drive and drives the fourth movable member 52 to radially extend into the corresponding feed pipe 61 or discharge pipe 62 through the connecting branch pipe 531, so as to change the flow area of the feed pipe 61 or the discharge pipe 62, block the normal feeding or discharging of resin, and simulate the resin plugging failure. The device of the present application can simulate the failures of difficult resin feeding and discharging that may occur in the actual operation process through the provided simulation plugging mechanism, which is convenient for the operation and maintenance personnel to carry out targeted simulation disposal operation training for this failure, and improve the failure disposal ability of the operation and maintenance personnel in the on-site actual operation.

[0107] In some other embodiments, for the ion exchange device 600, the simulation plugging mechanism 50 can be only arranged between the feed pipe 61 and the resin bed 60, so as to block the new resin from entering the resin cavity through the feed pipe 61 by changing the flow area of the feed pipe 61, and simulate the plugging failure caused by difficult resin feeding. In addition, the simulation plugging mechanism 50 can also be only arranged between the discharge pipe 62 and the resin bed 60, so as to block the old resin from being discharged from the resin cavity through the discharge pipe 62 by changing the flow area of the discharge pipe 62, and simulate the plugging failure caused by difficult resin discharging. Users can set it accordingly according to actual use needs, and the present application does not limit this.

[0108] Please refer to Figure 1 , in some embodiments, the ion exchange device 600 further includes a resin loader 66. The discharge port of the resin loader 66 is connected to the resin cavity of the resin bed 60 through the feed pipe 61, so as to automatically load new resin into the resin cavity of the resin bed 60 through the resin loader 66. The ion exchange device 600 further includes a flushing water pump 67. The water outlet of the flushing water pump 67 is connected to the resin backwashing port 65 at the bottom of the resin bed 60 through a flushing water pipeline (not marked), so as to press the backwashing water into the resin cavity through the flushing water pump 67 to loosen and disperse the resin layer. The ion exchange device 600 is also equipped with a resin bed working platform frame 68 for fixing the resin bed 60 and providing a high-altitude working platform for the equipment operation and maintenance personnel. A second platform 681 is arranged on the resin bed working platform frame 68, and the equipment operation and maintenance personnel can stand on the second platform 681 to perform disposal operations on the corresponding pipeline valves of the resin bed 60, etc., improving the convenience of equipment maintenance operations.

[0109] Please refer to Figure 9 , in some embodiments, the device of the present application further includes a control module 7 electrically connected to the simulated bolt jamming mechanism 20, the simulated plugging mechanism 50, the simulated gas-liquid splashing mechanism 30 and the locking control mechanism 40, so as to control the operation of the simulated bolt jamming mechanism 20, the simulated plugging mechanism 50, the simulated gas-liquid splashing mechanism 30 and the locking control mechanism 40 through the control module 7.

[0110] Specifically, the control module 7 is electrically connected to the first driving member 23, the second driving member 26, the third driving member 43, the fourth driving member 51, the air compressor 31, and the pressure sensor 18 through control circuits respectively, so as to control the operation of each driving member, and automatically control the start and stop of the air compressor 31 according to the pressure detection data transmitted back by the pressure sensor 18, thereby simulating various types of faults during the equipment operation process. The device of the present application further includes a power supply module 8 that is electrically connected to the first driving member 23, the second driving member 26, the third driving member 43, the fourth driving member 51, the air compressor 31, etc. through a power supply circuit, to provide power support for the operation of each driving member and the air compressor 31.

[0111] The nuclear power plant water purification equipment simulation operation device provided by the present application can control the occurrence of various types of faults of the equipment through the control module 7, realize the automatic operation of the device, can improve the ability of equipment operation and maintenance personnel to handle sudden faults, and ensure that relevant faults can be handled in a timely and correct manner during the actual operation process.

[0112] Furthermore, the device of the present application further includes a remote controller 9 that is wirelessly connected to the control module 7. The remote controller 9 sends control signals to the control module 7, and the control module 7 controls the operation of the simulated bolt jamming mechanism 20, the simulated gas-liquid splashing mechanism 30, the locking control mechanism 40, and the simulated material blocking mechanism 50 according to the received control signals, so as to remotely control the occurrence of equipment faults. The supervisor can also manually control the timing of the occurrence of various types of equipment faults through the remote controller 9, and independently select the fault type according to the operation progress of the trained operation and maintenance personnel, which can simulate the randomness of sudden faults in actual operation and improve the ability of operation and maintenance personnel to handle sudden faults.

[0113] In some other embodiments, the control module 7 can also be set to be electrically connected only to one or several of the above-mentioned fault simulation mechanisms, so as to automatically control the occurrence of a certain type or several types of faults, and can control the timing of the occurrence of a certain type or several types of faults through the remote controller 9.

[0114] For example, the control module 7 can be set to be electrically connected to the third driving member 43 through a control circuit, and the remote controller 9 is wirelessly connected to the control module 7 through a wireless communication module (not shown in the figure) for sending control signals to the control module 7. During the simulation operation training, the operation of the third driving member 43 can be controlled remotely through the remote controller 9 to control the occurrence of the fault that the filter element 13 accidentally drops during the process of operating the filter element lifting tool 17 to hoist or transfer the first filter element 131.

[0115] Preferably, the control module 7 can be arranged on an industrial control computer (not shown in the figure), and the operation control program built in the industrial control computer is used to realize the operation control of the simulated bolt jamming mechanism 20, the simulated gas-liquid splashing mechanism 30, the locking control mechanism 40, and the simulated material blocking mechanism 50, so as to realize the online control and autonomous selection of the fault mode and fault simulation, thereby realizing the automatic operation. It can also be combined with relevant auxiliary programs or devices to realize the monitoring of the simulated operation process and the monitoring of operation standardization, so as to automatically judge right or wrong in line with the actual operation of the operation and maintenance personnel, and be able to issue prompt and alarm messages when the operation and maintenance personnel operate incorrectly.

[0116] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A simulation operation device for a water purification equipment of a nuclear power plant, characterized in that, It includes an auxiliary filtration device and an ion exchange device connected in sequence according to the water purification treatment steps; The auxiliary filtration device includes at least one filter and a simulated bolt jamming mechanism. The filter has a lid and a housing connected movably, a filter element housed in the housing, and a threaded fastener for locking and fixing the lid and the housing; the simulated bolt jamming mechanism is arranged between the threaded fastener and the lid and the housing to block the normal locking of the threaded fastener; The ion exchange device includes a resin bed and a simulated material blocking mechanism. An inlet pipeline is arranged at the upper part of the resin bed, and an outlet pipeline is arranged at the lower part of the resin bed; the simulated material blocking mechanism is arranged between the inlet pipeline or / and the outlet pipeline and the resin bed to change the flow area of the inlet pipeline or / and the outlet pipeline.

2. The simulated operation device of the nuclear power plant water purification equipment according to claim 1, characterized in that, The simulated bolt jamming mechanism includes a fixing hole axially penetrating through the lid or the housing, a threaded sleeve movably arranged in the fixing hole and cooperating with the threaded fastener, a first driving member fixedly arranged on the lid or the housing, and a first movable member at least partially movably in the fixing hole. A gap is left between the threaded sleeve and the inner wall of the fixing hole; the first movable member is fixedly connected to the first driving member and is driven by the first driving member to movably insert into the gap to radially abut against the threaded sleeve and make it eccentric.

3. The simulated operation device of the nuclear power plant water purification equipment according to claim 2, characterized in that, One end of the first movable member movably inserted into the gap is set as a wedge-shaped structure, and the surface of the wedge-shaped structure abutting against the threaded sleeve is a slope surface.

4. The simulated operation device of the nuclear power plant water purification equipment according to claim 1, characterized in that, The threaded fastener includes a loose joint bolt and a nut. One end of the loose joint bolt is movably hinged on the lid or the housing. A screw rod is arranged at the free end of the loose joint bolt, and the nut is threadedly connected to the screw rod; The simulated bolt jamming mechanism includes a guiding groove axially arranged on the screw rod, a second driving member fixedly arranged on the loose joint bolt, and a second movable member movably connected to the guiding groove. The second movable member is fixedly connected to the second driving member and at least partially radially protrudes from the guiding groove, and is driven by the second driving member to move along the guiding groove towards the outer end of the screw rod to block the normal locking of the nut.

5. The nuclear power plant water purification equipment simulation operation device according to any one of claims 1-4, characterized in that, The auxiliary filtration device further includes a simulated gas-liquid splashing mechanism. The simulated gas-liquid splashing mechanism includes an air compressor and a medium storage tank; the compressed air outlet of the air compressor is connected to the gas source inlet of the medium storage tank through an air pipeline; a medium liquid is stored in the medium storage tank, and the medium outlet of the medium storage tank is connected to the filtration cavity of the housing for housing the filter element through a medium output pipeline to introduce a gas-liquid mixed medium into the filtration cavity under a set pressure limit value; A pressure sensor for detecting the internal pressure of the filtration cavity is arranged on the housing.

6. The simulated operation device of the nuclear power plant water purification equipment according to claim 5, characterized in that, The auxiliary filtering device further comprises a filter element lifting tool and a locking control mechanism, wherein the filter element lifting tool comprises an outer tube, an inner connecting member movably arranged in the outer tube, an operating member connected to the inner connecting member, and a clamping mechanism connected to the inner connecting member or / and the outer tube through a transmission structure, wherein the inner connecting member moves relative to the outer tube under the driving of the operating member and acts on the transmission structure to control the clamping mechanism to grab or release the filter element; The inner connecting member comprises a first connecting pipe portion and a second connecting pipe portion, wherein the first connecting pipe portion is at least partially movably inserted into the second connecting pipe portion; and the operating member is connected to the first connecting pipe portion or the second connecting pipe portion; The locking control mechanism is disposed between the first connecting pipe portion and the second connecting pipe portion to connect the first connecting pipe portion and the second connecting pipe portion as a whole, or to disconnect the first connecting pipe portion and the second connecting pipe portion.

7. The nuclear power plant water purification equipment simulation operation device according to claim 6, characterized in that, The first connecting pipe part comprises a lower pipe part movably inserted into the second connecting pipe part, and the outer diameter of the lower pipe part matches the inner diameter of the second connecting pipe part; The locking control mechanism comprises through holes which radially penetrate the side wall of the lower tube and are distributed circumferentially, first clamping grooves which are arranged on the inner wall of the second connecting tube and respectively correspond to the through holes, a third driving member which is fixedly arranged in the lower tube, a third movable member which is movably arranged in the lower tube and fixedly connected to the third driving member, and positioning beads which are movably arranged in the through holes, wherein the diameter of the positioning beads is greater than the length of the through holes in the axial direction; the outer diameter of the third movable member matches the inner diameter of the lower tube, and the outer wall of the third movable member is provided with second clamping grooves which respectively correspond to the through holes; When the third movable member is in the first position, its outer wall radially presses against the positioning bead so that the positioning bead is at least partially inserted into the corresponding first slot; when the third movable member is driven by the third driving member to move to the second position, the second slot moves to the corresponding through hole, so that the positioning bead is at least partially inserted into the corresponding second slot and disengaged from the first slot.

8. The simulated operation device for the nuclear power plant water purification equipment according to claim 6, characterized in that, It also includes a control module electrically connected to the simulated bolt jamming mechanism or / and the simulated material blocking mechanism or / and the simulated gas-liquid splashing mechanism or / and the locking control mechanism, so as to control the operation of the simulated bolt jamming mechanism or / and the simulated material blocking mechanism or / and the simulated gas-liquid splashing mechanism or / and the locking control mechanism through the control module; Or it also includes a remote control wirelessly connected to the control module, the remote control sends a control signal to the control module, and the control module controls the operation of the simulated bolt jamming mechanism and / or the simulated blocking mechanism and / or the simulated gas-liquid splashing mechanism and / or the locking control mechanism according to the received control signal.

9. The simulated operation device of the nuclear power plant water purification equipment according to any one of claims 1-4, characterized in that, The auxiliary filtering device comprises two types of filters, namely a vertical filter and a horizontal filter. The vertical filter and the horizontal filter are connected in sequence according to the water purification process steps.

10. The nuclear power plant water purification equipment simulation operation device according to claim 1, characterized in that, The simulated material blocking mechanism includes a fourth driving member and a fourth moving member movably disposed on one side of the feed pipe and / or the discharge pipe. The fourth moving member is fixedly connected to the fourth driving member and radially extends into the feed pipe and / or the discharge pipe under the drive of the fourth driving member to change the flow area of the feed pipe and / or the discharge pipe.

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