CN112780948A - Water filling and exhausting device and method for SEBIM pilot operated safety valve of nuclear power plant - Google Patents
Water filling and exhausting device and method for SEBIM pilot operated safety valve of nuclear power plant Download PDFInfo
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- CN112780948A CN112780948A CN202011557203.2A CN202011557203A CN112780948A CN 112780948 A CN112780948 A CN 112780948A CN 202011557203 A CN202011557203 A CN 202011557203A CN 112780948 A CN112780948 A CN 112780948A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 136
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000002347 injection Methods 0.000 claims description 35
- 239000007924 injection Substances 0.000 claims description 35
- 238000007599 discharging Methods 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 16
- 238000005553 drilling Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000002285 radioactive effect Effects 0.000 description 7
- 238000009434 installation Methods 0.000 description 4
- 230000001174 ascending effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000941 radioactive substance Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
- F16L25/009—Combination of a quick-acting type coupling and a conventional one
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/18—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses characterised by the use of additional sealing means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/24—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses with parts screwed directly on or into the hose
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/26—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses specially adapted for hoses of metal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L41/00—Branching pipes; Joining pipes to walls
- F16L41/08—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of another pipe
- F16L41/086—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of the wall or to the axis of another pipe fixed with screws
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/07—Arrangement or mounting of devices, e.g. valves, for venting or aerating or draining
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/14—Conveying liquids or viscous products by pumping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Structure Of Emergency Protection For Nuclear Reactors (AREA)
Abstract
The invention belongs to the technical field of valve maintenance, and particularly relates to a water filling and exhausting device and method for an SEBIM pilot-operated safety valve of a nuclear power plant. According to the technical scheme, the position of water filling and air exhausting is changed, the downward drainage pipeline does not need to be detached, the water filling and air exhausting of the downward drainage pipeline does not need to be carried out by utilizing a system medium, the water filling and air exhausting quality can be effectively improved, the system medium is a water entity, the action performance of the valve and the accuracy of opening and closing pressure are guaranteed, and the safe and reliable operation of equipment is guaranteed.
Description
Technical Field
The invention belongs to the technical field of valve maintenance, and particularly relates to a water filling and exhausting device and method for an SEBIM pilot-operated safety valve of a nuclear power plant.
Background
The SEBIM pilot operated safety valve is mainly used for three systems in a million-kilowatt nuclear power station: RCP, RRA and RCV are all key sensitive devices (SPV devices) for unit operation. The SEBIM safety valve is a non-spring safety valve in design, the valve body is driven by the action of the control cabinet to open and close the valve clack, and the unique design of the valve ensures the sealing performance of the valve under high pressure and the performance of timely and accurate seat return. The SEBIM valve is used at a system position with high requirement on pressure, and the valve is designed to transmit pressure by liquid, so that the pressure transmission is seriously influenced by the existence of gas, and the action performance of the valve and the accuracy of the pressure for opening and recoiling the valve are directly influenced. Therefore, after the SEBIM safety valve is overhauled or a system loop is emptied, water filling and gas discharging work is required, and the water filling and gas discharging quality directly determines the running reliability of equipment.
At present, the RRA and RCV system SEBI IM pilot operated safety valve water filling and exhausting mode is to dismantle a lower drainage pipeline of a control cabinet, one end of a water injection device is connected with an REA system demineralized water loop, the other end of the water injection device is connected with the control cabinet through a bolt with holes, and then the SEBI IM safety valve control pipeline is filled with water and exhausted by sequentially operating three block assemblies.
The method has the defects that the water filling and air exhausting effect is poor, and the water filling and air exhausting can not be carried out on the dismantled downward drainage pipeline part; in the water filling stage of the system, radioactive system media are also used for supplementing and exhausting the downward drainage pipeline, so that the radioactivity level in the control cabinet is increased; meanwhile, the joint of the lower part of the three pieces of the control cabinet which is installed on site to a downward drainage pipeline is generally stressed, the control cabinet is difficult to disassemble on site, and the control cabinet and the 128 bolt threads are easily damaged in the installation and disassembly processes.
Disclosure of Invention
Aiming at the defects, the invention aims to provide a water filling and exhausting device and a water filling and exhausting method for an SEBI (styrenic block identity Module) pilot type safety valve of a nuclear power plant, which effectively solve the problems of insufficient water filling and exhausting of a bleed pipeline of an SEBI safety valve of RRA (remote radio Access) and RCV (remote control Unit) systems of the nuclear power plant, high dosage of a control cabinet, difficulty in disassembling the bleed pipeline and the like.
The technical scheme of the invention is as follows:
a nuclear power plant SEBI IM pilot operated type relief valve fills water exhaust apparatus, including foraminiferous long bolt, water injection device, metal collapsible tube, fill water exhaust joint and gasket, O-ring, foraminiferous long bolt is emboliaed in the water injection device, the female runner of the water injection device is just aimed at the horizontal pilot hole of the foraminiferous long bolt; the other end is connected with a quick connector which can be connected with a quick connector of a desalination water system;
the lower end of the long bolt with the hole is connected with the water-filling exhaust joint through a metal hose;
the lower end of the water filling and air exhausting joint penetrates through a through hole of the pulse pipeline and is connected to the inlet of the control cabinet.
The long bolt with the hole penetrates through the upper and lower joints of the water injection device and is provided with a gasket and an O-shaped ring.
The inflation and exhaust joint penetrates through the upper and lower joints of the pulse pipeline and is provided with a gasket and an O-shaped ring.
The bolt is a long bolt with a hole, the length of a bolt screw is 55mm, the length of a top thread is 15mm, the thickness of an M12 bolt and a hexagon head is 10 mm; a2.5 mm through hole is formed at a position 12mm away from the lower end surface of the hexagonal head, and a 2.5mm through hole is formed at a position 33mm away from the lower part of the hexagonal head.
Drilling a 50mm hole upwards in the center of the bottom of the bolt of the long bolt; the long bolt with the hole is provided with a vertical diversion hole and a horizontal diversion hole, and the demineralized water flows in from the horizontal diversion hole and flows out along the vertical diversion hole.
The water injection device main body consists of a 9u filter screen and a cut-off valve A; the part connected with the long bolt is formed by combining a cuboid and a cylinder, and the left side of the cuboid is 32mm long, 27mm wide and 22mm high; drilling a through hole with the diameter of 14 at the center of the drill bit, and drilling counter bores with the depth of 1mm and the diameter of 23mm on the upper end surface and the lower end surface; and a round groove with the diameter of 2.5mm is also processed in the through hole on the left side.
The special joint of the water-filling air-discharging joint has the total length of 80mm, the top thread length of 15mm, M12 multiplied by 1.5 threads and the thickness of a hexagonal head of 30 mm.
The length of the screw is 35mm from the lower end of the hexagonal head, the length of the bottom thread is 15mm, and G1/4 threads are formed; a guide hole is drilled upwards in the center of the bottom of the bolt, and the guide hole facilitates the circulation of a demineralized water medium; an O-shaped ring is arranged above the bottom thread.
A nuclear power plant SEBIM pilot operated safety valve water filling and air exhausting method, lead out demineralized water from REA352WV position of the nuclear power plant, link with one end of the water injection device through the quick-operation joint, another end is crossed by the long bolt with hole, fix on metal hose, put the stainless steel and insert the rubbery spacer in the upper and lower terminal surface of the bolt, guarantee the sealed effect; the other end of the metal hose is connected with the thread of the water-filling exhaust joint, and the water-filling exhaust joint is screwed into the pulse pipeline and is fastened to the control cabinet by 40N.m torque;
in the water filling and exhausting process, a valve A on the water injection device controls the entry of demineralized water, and the demineralized water flows through the long bolt with the hole and the metal hose after being filtered by the water injection device and enters a control cabinet of the valve;
the two paths of flow dividers R1 on the control cabinet are operated to keep the channel R1 open, the demineralized water flows through the control pipeline and enters the valve body, and the control pipeline and the piston cavity of the valve body are filled with water and exhausted by matching with a hand vacuum pump arranged on the valve body;
the flow passages of R1 and R2 are kept open by operating the two paths of flow dividers R1 and R2 on the control cabinet, and the desalted water flows to the lower discharge pipeline through the three-module assembly on the control cabinet, so that the water filling and the air exhaust of the lower discharge pipeline are completed.
The invention has the beneficial effects that:
1. the operation reliability of the key sensitive equipment of the unit is improved: the improved water filling mode does not need to disassemble the drainage pipeline, improves the water filling and air exhausting quality of the drainage pipeline, realizes the water body of the pipeline, and improves the operation reliability of equipment. Meanwhile, the improved water filling and air exhausting mode greatly reduces the radioactive medium entering the control cabinet, slows down the rate of radiation aging of a large number of rubber components in the control cabinet, improves the reliability of the equipment and improves the running reliability of the equipment;
2. the service life of the equipment is prolonged: the joints of the lower parts of the three blocks to the downward-discharging pipeline are stressed during field installation, the field disassembly is difficult, the control cabinet and the 128 bolt threads are easily damaged in the installation and disassembly processes (the 128 bolt is replaced after the overhaul), the pipeline does not need to be disassembled in the improved water-filling and air-exhausting mode, the damage of the bolt is avoided, and the reliability of the equipment is improved;
3. the operation is simple, the overhaul period is shortened: in the optimized water filling and air exhausting mode, the water filling and air exhausting period of a single valve is shortened from 2.5 hours to 1 hour, and the low water level period can be reduced by 7.5 hours in a single overhaul. Meanwhile, the drainage working hours of the pulse pipeline during the ascending period are saved, only the needle valve of the control cabinet needs to be opened for exhausting during the mechanical ascending period, the control cabinet door does not need to be disassembled, the ascending time is saved by 2 hours, and the labor cost is saved;
4. reduce the radioactivity of the equipment, reduce the personnel dose: the improved water filling and air exhausting mode adopts an ARE system non-radioactive water source to fill water and exhaust air for a downward drainage pipeline (the prior method adopts radioactive RRA and RCV system radioactive media to fill water and exhaust air), so that the radioactive water source is prevented from directly entering a control cabinet, the accumulation of radioactive substances in the control cabinet can be reduced, and the irradiation dose of maintainers during the complete disintegration of the control cabinet is reduced;
5. low cost, high reliability: the technical proposal relates to a tool which has simple structure, can be directly machined and manufactured, is convenient to disassemble and assemble when used on site, has high reliability and is not easy to damage.
Drawings
Fig. 1 is a schematic view of the assembly structure of the water filling and air exhausting device of the present invention.
In the figure: 1-long bolt with hole 2-water injection device 3-metal hose 4-water filling and exhausting joint 5-pulse pipeline 6-control cabinet inlet.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
At present, the RRA and RCV system SEBI IM pilot operated safety valve water filling and exhausting mode is to dismantle a lower drainage pipeline of a control cabinet, one end of a water injection device is connected with an REA system demineralized water loop, the other end of the water injection device is connected with the control cabinet through a bolt with holes, and then the SEBI IM safety valve control pipeline is filled with water and exhausted by sequentially operating three block assemblies.
The method has the defects that the water filling and air exhausting effect is poor, and the water filling and air exhausting can not be carried out on the dismantled downward drainage pipeline part; in the water filling stage of the system, radioactive system media are also used for supplementing and exhausting the downward drainage pipeline, so that the radioactivity level in the control cabinet is increased; meanwhile, the joints of the lower parts of the three pieces of control cabinet installed on site to a downward drainage pipeline are generally stressed, the on-site disassembly is difficult, and the control cabinet and the bolt threads are easily damaged in the installation and disassembly processes.
This patent adopts new water exhaust scheme that fills, and the attach fitting through utilizing independently to design makes water injection device and switch board pulse pipeline be system water inlet pipeline and link to each other, need not to dismantle under the condition of pipeline that lets out, through three block subassemblies of operation in proper order realize the SEBIM safety valve control pipeline, let out the water exhaust that fills of pipeline down. The device is shown in the attached drawings. A water filling and exhausting device of a SEBIM pilot-operated safety valve of a nuclear power plant comprises a long bolt 1 with a hole, a water injection device 2, a metal hose 3, a water filling and exhausting joint 4, a corresponding gasket and an O-shaped ring.
The long bolt with the hole 1 is sleeved into a water injection device, and an inner hole flow passage of the water injection device is just aligned to a transverse guide hole of the long bolt with the hole; the other end is connected with a quick connector which can be connected with a quick connector of a demineralized water system;
the lower end of the long bolt with the hole 1 is connected with a water filling and air exhausting joint 4 through a metal hose 3;
the lower end of the water filling and air exhausting joint 4 passes through a through hole of the pulse pipeline 5 and is connected to the inlet 6 of the control cabinet.
The long bolt with the hole 1 penetrates through the upper and lower joints of the water injection device 2 and is provided with a gasket and an O-shaped ring.
The inflation and exhaust joint 4 penetrates through the upper and lower joints of the pulse pipeline 5 and is provided with a gasket and an O-shaped ring.
The long bolt with the hole 1 is obtained by drilling holes on the basis of a common bolt, the length of a bolt screw rod is 55mm, the length of a top thread is 15mm, the bolt is an M12 bolt, and the thickness of a hexagon head is 10 mm. A2.5 mm through hole is formed in a position 12mm away from the lower end face of the hexagonal head, and a 2.5mm through hole is formed in a position 33mm away from the lower end face of the hexagonal head. A 50mm hole is drilled up the center of the bottom of the bolt. The medium circulation is carried out through bolt drilling, and the upper sealing ring and the lower sealing ring can bear high pressure. The long bolt with the hole is provided with the vertical and horizontal guide holes, so that the desalted water can conveniently flow in from the horizontal guide holes and flow out from the vertical guide holes.
The main body of the water injection device 2 consists of a 9u filter screen and a cut-off valve A. The part that links to each other with the stay bolt is cuboid and cylinder combination and forms, and the left side is the cuboid, and length 32mm, wide 27mm, height 22 mm. A through hole with the diameter of 14 mm is drilled at the center of the drill bit, and counterbores with the depth of 1mm and the diameter of 23mm are drilled on the upper end face and the lower end face. A round groove with the diameter of 2.5mm is also processed in the through hole on the left side. The long bolt with the hole 1 is sleeved into the water injection device, and an inner hole flow passage of the water injection device is just aligned to the transverse guide hole of the long bolt with the hole. The other end is connected with a quick connector which can be connected with a quick connector of a demineralized water system.
The water-filling and air-discharging joint 4 is manufactured by drilling and turning by machining means on the basis of a common stainless steel bar, as shown in figure 1. The total length of the special joint is 80mm, the length of the top thread is 15mm, the M12 multiplied by 1.5 thread and the thickness of the hexagonal head is 30 mm. The screw length is 35mm from the lower end of the hexagonal head, the bottom thread length is 15mm, and G1/4 threads are formed. And a guide hole is drilled upwards in the center of the bottom of the bolt, and the guide hole is convenient for the circulation of a demineralized water medium. An O-ring is placed above the bottom thread. When the water filling and exhausting joint 4 is installed on the control cabinet pulse pipeline 5, the O-shaped ring is sealed with the water outlet of the pulse pipeline, so that the phenomenon that demineralized water reversely enters the RRA and RCV systems through the pulse pipeline in the water filling and exhausting process can be avoided.
A water filling and exhausting method for a SEBIM pilot-operated safety valve of a nuclear power plant comprises the steps of leading out desalted water from the position of REA352WV, connecting the desalted water with one end of a water injection device 2 through a quick connector, penetrating through a long bolt 1 with a hole at the other end of the water injection device, fixing the water injection device on a metal hose 3, and placing gaskets made of stainless steel and rubber on the upper end face and the lower end face of the bolt to ensure the sealing effect. The other end of the metal hose 3 is connected with the thread of the water-filling air-discharging joint 4, and the water-filling air-discharging joint 4 is screwed into the pulse pipeline 5 and is fastened to the control cabinet 6 by 40N.m torque. In the water filling and exhausting process, the valve A on the water injection device controls the entry of the demineralized water, and the demineralized water flows through the long bolt with holes 1 and the metal hose 3 to enter the control cabinet of the valve after being filtered by the water injection device 2. The two paths of flow dividers R1 on the control cabinet are operated to keep the channel R1 open, the demineralized water flows through the control pipeline and enters the valve body, and the control pipeline and the valve body piston cavity are filled with water and exhausted by matching with a hand vacuum pump arranged on the valve body. The two paths of flow dividers R1 and R2 on the control cabinet are operated to keep the flow passages of R1 and R2 open, and the desalted water flows to the lower discharge pipeline through the three-module assembly on the control cabinet, so that the water filling and the air discharging of the lower discharge pipeline are completed.
In the drawings of the disclosed embodiments of the invention, only methods related to the disclosed embodiments are referred to, other methods can refer to common design, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;
the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The utility model provides a nuclear power plant SEBIM guide's formula relief valve exhaust apparatus that fills water, includes foraminiferous stay bolt, water injection device, metal collapsible tube, fills water exhaust joint and gasket, O type circle, its characterized in that:
the long bolt with the hole is sleeved in the water injection device, and an inner hole flow passage of the water injection device is just aligned to the transverse guide hole of the long bolt with the hole; the other end is connected with a quick connector which can be connected with a quick connector of a demineralized water system;
the lower end of the long bolt with the hole is connected with the water-filling exhaust joint through a metal hose;
the lower end of the water filling and air exhausting joint penetrates through a through hole of the pulse pipeline and is connected to the inlet of the control cabinet.
2. The water and gas filling and discharging device for the SEBIM pilot operated safety valve of the nuclear power plant as claimed in claim 1, wherein: the long bolt with the hole penetrates through the upper and lower joints of the water injection device and is provided with a gasket and an O-shaped ring.
3. The water and gas filling and discharging device for the SEBIM pilot operated safety valve of the nuclear power plant as claimed in claim 1, wherein: the inflation and exhaust joint penetrates through the upper and lower joints of the pulse pipeline and is provided with a gasket and an O-shaped ring.
4. The water and gas filling and discharging device for the SEBIM pilot operated safety valve of the nuclear power plant as claimed in claim 1, wherein: the bolt is a long bolt with a hole, the length of a bolt screw is 55mm, the length of a top thread is 15mm, the thickness of an M12 bolt and a hexagon head is 10 mm; a2.5 mm through hole is formed at a position 12mm away from the lower end surface of the hexagonal head, and a 2.5mm through hole is formed at a position 33mm away from the lower part of the hexagonal head.
5. The water and gas filling and discharging device for the SEBIM pilot operated safety valve of the nuclear power plant as claimed in claim 4, wherein: drilling a 50mm hole upwards in the center of the bottom of the bolt of the long bolt; the long bolt with the hole is provided with a vertical guide hole and a horizontal guide hole, and the desalted water flows in from the horizontal guide hole and flows out along the vertical guide hole.
6. The water and gas filling and discharging device for the SEBIM pilot operated safety valve of the nuclear power plant as claimed in claim 1, wherein: the water injection device main body consists of a 9u filter screen and a cut-off valve A; the part connected with the long bolt is formed by combining a cuboid and a cylinder, and the left side of the cuboid is 32mm long, 27mm wide and 22mm high; drilling a through hole with the diameter of 14 at the center of the drill bit, and drilling counter bores with the depth of 1mm and the diameter of 23mm on the upper end surface and the lower end surface; a round groove with the diameter of 2.5mm is also processed in the through hole on the left side.
7. The water and gas filling and discharging device for the SEBIM pilot operated safety valve of the nuclear power plant as claimed in claim 1, wherein: the special joint of the water-filling air-discharging joint has the total length of 80mm, the top thread length of 15mm, M12 multiplied by 1.5 threads and the thickness of a hexagonal head of 30 mm.
8. The water and gas filling and discharging device for the SEBIM pilot operated safety valve of the nuclear power plant as claimed in claim 7, wherein: the length of the screw is 35mm from the lower end of the hexagonal head, the length of the bottom thread is 15mm, and G1/4 threads are formed; a guide hole is drilled upwards in the center of the bottom of the bolt, and the guide hole facilitates the circulation of a demineralized water medium; an O-shaped ring is arranged above the bottom thread.
9. A nuclear power plant SEBIM pilot operated safety valve water filling and air exhausting method is characterized in that: the demineralized water is led out from the REA352WV position of the nuclear power plant, is connected with one end of a water injection device through a quick connector, the other end of the water injection device is penetrated through by a long bolt with a hole and is fixed on a metal hose, and gaskets made of stainless steel and rubber are placed on the upper end face and the lower end face of the bolt to ensure the sealing effect; the other end of the metal hose is connected with the thread of the water-filling exhaust joint, and the water-filling exhaust joint is screwed into the pulse pipeline and is fastened to the control cabinet by 40N.m torque;
in the water filling and exhausting process, a valve A on the water injection device controls the entry of demineralized water, and the demineralized water flows through the long bolt with the hole and the metal hose after being filtered by the water injection device and enters a control cabinet of the valve;
the two paths of flow dividers R1 on the control cabinet are operated to keep the channel R1 open, the demineralized water flows through the control pipeline and enters the valve body, and the control pipeline and the piston cavity of the valve body are filled with water and exhausted by matching with a hand vacuum pump arranged on the valve body;
the flow passages of R1 and R2 are kept open by operating the two paths of flow dividers R1 and R2 on the control cabinet, and the desalted water flows to the lower discharge pipeline through the three-module assembly on the control cabinet, so that the water filling and the air exhaust of the lower discharge pipeline are completed.
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| CN202011557203.2A CN112780948A (en) | 2020-12-25 | 2020-12-25 | Water filling and exhausting device and method for SEBIM pilot operated safety valve of nuclear power plant |
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| CN202011557203.2A CN112780948A (en) | 2020-12-25 | 2020-12-25 | Water filling and exhausting device and method for SEBIM pilot operated safety valve of nuclear power plant |
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