CN112660985A - Nuclear power station reactor protective steel structure hydraulic lifting appliance - Google Patents
Nuclear power station reactor protective steel structure hydraulic lifting appliance Download PDFInfo
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- CN112660985A CN112660985A CN202011629261.1A CN202011629261A CN112660985A CN 112660985 A CN112660985 A CN 112660985A CN 202011629261 A CN202011629261 A CN 202011629261A CN 112660985 A CN112660985 A CN 112660985A
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Abstract
The invention belongs to the technical field of nuclear power station reactor maintenance, and particularly relates to a protective steel structure hydraulic lifting appliance for a nuclear power station reactor, which comprises: the hydraulic valve group, the flower basket nut, the positioning nut, the lower support hanger, the upper support hanger, the shaft type piston and the hydraulic oil cylinder; the hydraulic valve group comprises a hydraulic cylinder, a lower supporting hanger and a hydraulic valve group, wherein the lower supporting hanger is fixedly connected to the lower end of the hydraulic cylinder, a shaft-shaped piston is arranged inside the hydraulic cylinder, one end of the shaft-shaped piston is connected with the upper supporting hanger through a positioning nut and a basket nut, and the hydraulic valve group is fixedly arranged on the lower portion of the hydraulic cylinder. The invention improves the working efficiency of the protective steel structure hoisting work, improves the accuracy of the hoisting levelness and the safety of the hoisting work, saves time and labor, improves the working efficiency of the protective steel structure hoisting work by operation, and improves the accuracy of the hoisting levelness and the safety of the hoisting work conveniently and quickly.
Description
Technical Field
The invention belongs to the technical field of nuclear power station reactor maintenance, and particularly relates to a protective steel structure hydraulic lifting appliance for a nuclear power station reactor.
Background
The reactor comprises a reactor pressure vessel, a reactor core hanging basket, a reactor core coaming, a protection tube assembly, a fuel assembly, a control rod assembly, an upper assembly, a protection rigid structure, a control rod driving mechanism and other components, wherein the protection steel structure is a welded metal structure and is mainly used for installing a control driving mechanism cable, a reactor core monitoring cable and a leakage alarm cable; the upper assembly is used for maintaining and serving as a biological barrier to protect equipment maintenance personnel; the upper assembly is reinforced to prevent it from vibrating during an earthquake.
The current protective steel structure lifting appliance for the reactor is a mechanical adjustable lifting appliance, and the following technical problems exist in use:
1) when the existing reactor protective steel structure mechanical lifting appliance is used, the length of the mechanical adjustable lifting appliance needs to be adjusted for many times; when the levelness of the protective steel structure is adjusted, the protective steel structure is placed back to the ground of the reactor cement shaft every time, the length center distance of the existing mechanical lifting appliance of the protective steel structure of the reactor is readjusted according to the measured level reading value, the levelness of the protective steel structure is adjusted, and the lifting appliance is hoisted again to check the levelness until the levelness meets the requirements. The adjustment in a hoisting state cannot be realized in the whole process;
2) the existing mechanical adjustable lifting appliance is heavy in design, the length of the mechanical adjustable lifting appliance can be adjusted only by a plurality of maintenance personnel and lifting personnel, and the adjustment is time-consuming and labor-consuming;
3) after the length adjustment work of the existing mechanical adjustable lifting appliance is finished, the universal beam and the protective steel structure need to be lifted by using the crane again, and whether the levelness is qualified or not is measured. And when the lifting appliance is unqualified, repeatedly adjusting the length of the adjustable lifting appliance. The work of adjusting the levelness and the length of the mechanical adjustable lifting appliance cannot be synchronously executed, the tracking response speed is slow, and the working efficiency is low;
4) when the length of the adjustable lifting appliance of the existing machinery is adjusted, personnel must stand on a top cover plate of a protective steel structure, and the working environment is poor; and the leveling accuracy of the mechanical adjustable lifting appliance is lower.
Therefore, a nuclear power plant reactor protective steel structure hydraulic lifting appliance needs to be designed aiming at the technical problems so as to overcome the defects of the prior art.
Disclosure of Invention
The invention aims to design a nuclear power station reactor protective steel structure hydraulic lifting appliance, which is used for effectively solving the technical problems that the existing reactor protective steel structure mechanical adjustable lifting appliance cannot adjust the levelness of a protective steel structure in a lifting state, and the existing protective steel structure mechanical adjustable lifting appliance is heavy in structure, complex in adjustment of the length of the protective steel structure mechanical adjustable lifting appliance and low in leveling accuracy.
The technical scheme of the invention is as follows:
the utility model provides a nuclear power station reactor protective steel structure hydraulic lifting device, includes: the hydraulic valve group, the flower basket nut, the positioning nut, the lower support hanger, the upper support hanger, the shaft type piston and the hydraulic oil cylinder; the hydraulic valve group comprises a hydraulic cylinder, a lower supporting hanger and a hydraulic valve group, wherein the lower supporting hanger is fixedly connected to the lower end of the hydraulic cylinder, a shaft-shaped piston is arranged inside the hydraulic cylinder, one end of the shaft-shaped piston is connected with the upper supporting hanger through a positioning nut and a basket nut, and the hydraulic valve group is fixedly arranged on the lower portion of the hydraulic cylinder.
The lower support hanger comprises: the lower support hanger is connected with the hydraulic oil cylinder, and one end of the lower support hanger, which is not connected with the hydraulic oil cylinder, is provided with a positioning pin hole A; and the lower fixed pin shaft penetrates through the positioning pin hole A and is fixed on the lower support hanger.
The upper support hanger includes: the upper supporting and hanging piece is connected with the shaft type piston, and one end of the upper supporting and hanging piece, which is not connected with the shaft type piston, is provided with a positioning pin hole B; and the upper fixed pin shaft penetrates through the positioning pin hole B and is fixed on the upper supporting hanger.
The hydraulic cylinder includes: the oil cylinder comprises an oil cylinder lower body, an oil cylinder upper body, a fastening screw, an exhaust hole, an upper sealing component, a middle sealing component, a lower sealing component and an oil filling hole; the lower body of the oil cylinder is fixedly connected with the upper body of the oil cylinder; a fastening screw is arranged on the upper body of the oil cylinder;
the shaft type piston penetrates through the lower oil cylinder body and the upper oil cylinder body; the lower sealing component is arranged between the inner wall of the lower body of the oil cylinder and the outer wall of the shaft type piston, and a middle sealing component is also arranged in the lower body of the oil cylinder; the upper sealing assembly is arranged between the inner wall of the upper body of the oil cylinder and the outer wall of the shaft type piston; the oil cylinder lower body is also provided with an oil through hole; and the surface of the upper body of the oil cylinder is also provided with an exhaust hole and an oil injection hole respectively.
The outer wall of the shaft-shaped piston is further sleeved with a spring, the lower portion of the shaft-shaped piston is further provided with an annular thrust disc, the annular thrust disc is arranged inside the lower body of the oil cylinder and is in contact with the inner wall of the lower body of the oil cylinder, and a piston separation sealing assembly is arranged on the annular thrust disc.
The hydraulic valve group includes: manual valves and electric valves; the hydraulic valve group is fixed on the lower body of the hydraulic oil cylinder.
The invention has the technical effects that:
1) the device has local and remote control functions and can meet the requirements of different control positions; the hydraulic adjustment precision of the device is within 1mm, and the device has an adjustment range of 240 mm;
2) according to the invention, a hydraulic adjusting mode is adopted to replace a threaded screw adjusting mode, so that synchronous adjustment of three hydraulic rods in a hoisting state is realized, frequent manual adjustment by using a ring crane to lift a heavy object is avoided, and time and labor are saved;
3) the invention adopts a laser and graduated scale mode to replace a leveling instrument and a plate ruler measurement mode, is used for synchronously measuring the levelness of the lifting appliance and adjusting the length of the screw rod, has timely tracking response and more accurate reading. The operation time is saved, the operation steps are simplified, and the problem that the levelness of the existing lifting appliance is not synchronous in measurement and adjustment is solved.
4) The invention solves the problem that the ring crane repeatedly goes up and down in the process of adjusting levelness in the conventional lifting appliance basket screw nut repeated adjustment, and realizes the direct length adjustment of the lifting rod in the lifting state.
5) The invention solves the problem of low leveling precision of the existing lifting appliance, the existing scheme has high measurement precision and quick adjustment response, effectively improves the lifting efficiency of a protective steel structure, and improves the accuracy of lifting levelness and the safety of lifting work.
6) The hydraulic lifting appliance improves the working efficiency of the protective steel structure lifting work, improves the accuracy of the lifting levelness and the safety of the lifting work, saves time and labor, improves the working efficiency of the protective steel structure lifting work through operation, and improves the accuracy of the lifting levelness and the safety of the lifting work conveniently and quickly.
Drawings
FIG. 1 is a schematic structural diagram of a nuclear power plant reactor protective steel structure hydraulic lifting appliance designed by the invention;
FIG. 2 is a structural section view of a nuclear power plant reactor protective steel structure hydraulic lifting appliance designed by the invention;
FIG. 3 is a sectional view of an oil cylinder structure in the hydraulic lifting appliance with a protective steel structure for a nuclear power plant reactor of the invention
Wherein: 1-lower fixed pin shaft, 2-upper fixed pin shaft, 3-hydraulic valve group, 4-turnbuckle, 5-positioning nut, 6-oil filler point, 7-lower support hanger, 8-oil cylinder lower body, 9-spring, 10-upper support hanger, 11-oil cylinder upper body, 12-shaft type piston, 13-fastening screw, 14-exhaust hole, 15-upper sealing component, 16-middle sealing component, 17-piston separation sealing component, 18-lower sealing component, 19-hydraulic oil cylinder
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments,
the utility model provides a nuclear power station reactor protective steel structure hydraulic lifting device, includes: the hydraulic valve group comprises a hydraulic valve group 3, a turnbuckle 4, a positioning nut 5, a lower support hanger 7, an upper support hanger 10, a shaft type piston 12 and a hydraulic oil cylinder 19; the lower support hanger 7 is fixedly connected to the lower end of a hydraulic oil cylinder 19, a shaft type piston 12 is arranged inside the hydraulic oil cylinder 19, one end of the shaft type piston 12 is connected with the upper support hanger 10 through a positioning nut 5 and a basket nut 4, and the hydraulic valve group 3 is fixedly arranged on the lower portion of the hydraulic oil cylinder 19.
The lower support hanger 7 includes: the lower support hanger 7 is not connected with the hydraulic oil cylinder 19, and one end of the lower support hanger 7 is provided with a positioning pin hole A; and the lower fixed pin shaft 1 penetrates through the positioning pin hole A and is fixed on the lower support hanger 7.
The upper support hanger 10 includes: the positioning pin hole B is formed in one end, which is not connected with the shaft type piston 12, of the upper supporting and hanging piece 10; the upper fixing pin shaft 2 penetrates through the positioning pin hole B and is fixed on the upper supporting hanger 10.
The hydraulic cylinder 19 includes: the oil cylinder comprises an oil cylinder lower body 8, an oil cylinder upper body 11, a fastening screw 13, an exhaust hole 14, an upper sealing component 15, a middle sealing component 16, a lower sealing component 18 and an oil filling hole 6; the lower oil cylinder body 8 is fixedly connected with the upper oil cylinder body 11; a fastening screw 13 is arranged on the oil cylinder upper body 11;
the shaft type piston 12 penetrates through the oil cylinder lower body 8 and the oil cylinder upper body 11; the lower sealing component 18 is arranged between the inner wall of the oil cylinder lower body 8 and the outer wall of the shaft type piston 12, and the middle sealing component 16 is also arranged in the oil cylinder lower body 8; the upper sealing assembly 15 is arranged between the inner wall of the oil cylinder upper body 11 and the outer wall of the shaft type piston 12; an oil through hole is also formed in the lower body 8 of the oil cylinder; the surface of the oil cylinder upper body 11 is also respectively provided with an exhaust hole 14 and an oil filling hole 6.
The outer wall of the shaft type piston 12 is further sleeved with a spring 9, the lower part of the shaft type piston 12 is further provided with an annular thrust disc, the annular thrust disc is arranged inside the lower oil cylinder body 8 and is in contact with the inner wall of the lower oil cylinder body 8, and a piston separation sealing assembly 17 is arranged on the annular thrust disc.
The hydraulic valve group 3 comprises: manual valves and electric valves; the hydraulic valve group 3 is fixed on the cylinder lower body 8 of the hydraulic cylinder 19.
When the main function of the lower fixed pin shaft is performed, the lower fixed pin shaft and the lower support hanging piece are used for hoisting the protective steel structure together, and are connected with the protective steel structure lifting lug through the steel wire rope ring, and can also be directly connected, but the soft connection operation can be started through the steel wire rope ring, so that the hydraulic lifting appliance can be protected from strong impact;
the upper fixing pin shaft is mainly used for being connected with the upper supporting and hanging piece on the universal cross beam;
the oil through hole on the lower body of the oil cylinder is used for enabling hydraulic oil in the lower body of the oil cylinder to enter the upper body of the oil cylinder through the manual valve or the electric valve during hoisting.
The oil hole of the lower body of the oil cylinder and the manual valve or the electric valve are sealed through a sealing washer and a fastener. When the handle is pulled or the electric valve operating button is clicked, the oil way is opened, and the hydraulic oil is exchanged between the upper cylinder body and the lower cylinder body. Before the hoisting work is started, hydraulic oil in the lower cylinder body needs to be opened through a manual valve or an electric valve and then flows into the upper cylinder body, and then the manual valve or the electric valve is closed to prepare for the hoisting work;
the positioning nut is used for positioning the position of the basket of flowers nut and preventing the position of the basket of flowers nut from moving;
the spring is used for resetting and buffering the shaft type piston. Particularly, after the hoisting work is finished, the shaft-type piston needs to be reset, and the shaft-type piston can be reset by means of the counterforce of the spring and the assistance of manpower, so that the subsequent storage and transportation are convenient to prepare;
the shaft type piston can move up and down in an integral hydraulic oil cylinder formed by the lower oil cylinder body and the upper oil cylinder body, but hydraulic oil between the lower oil cylinder body and the upper oil cylinder body is separated up and down through a thrust disc on the shaft type piston. In order to ensure the sealing performance of hydraulic oil separation between the lower body of the oil cylinder and the upper body of the oil cylinder, a piston separation sealing assembly is arranged on a thrust disc on the shaft type piston;
when the exhaust hole is used for injecting oil into the lower cylinder body, gas in the cylinder body is discharged, and oil injection work of the hydraulic cylinder body is smoothly realized.
The flower basket nut is used as a spare of a hydraulic lifting appliance in special conditions. The turn of the turn nut can adjust the relative distance between the upper support hanger and the shaft type piston and also can change the length of the hydraulic lifting appliance, and the adjusting range is 120 mm.
And the total stroke adjusting range of the hydraulic lifting appliance designed by the invention is 240mm by adding the 120mm stroke of the shaft type piston on the lower body of the oil cylinder and the upper body of the oil cylinder.
The reactor protective steel structure hydraulic lifting appliance designed by the invention is applied to field operation and comprises the following steps:
the method comprises the following steps: connecting 3 hydraulic lifting appliances with 3 lifting lugs on a protective steel structure, opening valves of the hydraulic lifting appliances, and synchronously pressing down an upper supporting lifting element until a shaft type piston is completely contracted to the bottom; after the hydraulic lifting appliance is connected with the protection steel structure, the hydraulic lifting appliance is clamped by a spring clamp to prevent the connecting pin from loosening;
step two: mounting the laser demarcation device on a protective steel structure fence, and keeping horizontal mounting; debugging the laser measuring instrument to ensure that laser can smoothly and simultaneously irradiate the measuring scale; the ring crane is connected with the universal hanging beam, and the universal hanging beam is lifted to ensure that the bottom of the universal cross beam is higher than the highest point of the protection steel structure;
step three: moving the universal hanging beam to a protective steel structure storage position, and reliably connecting the universal hanging beam with the hydraulic lifting appliance; lifting the universal hanging beam and protecting the steel structure to be 500mm higher than the ground, opening the laser demarcation device, adjusting the levelness, and requiring that the deviation of the display values on 3 scales is less than 5 mm; if the levelness deviation is unqualified, a manual valve or an electric valve of the hydraulic lifting appliance in the higher direction of the protective steel is opened, and the hydraulic lifting appliance automatically extends under the gravity action of the protective steel structure, so that the length of each hydraulic lifting appliance is changed;
step four: a reading staff of the measuring scale stands beside each measuring scale, and the reading on the measuring scale continuously changes along with the automatic extension of the lifting appliance, so that the numerical values are compared and analyzed uniformly; when the scale of the measuring scale is a positive scale (the reading is changed from small to large), the smaller the displayed numerical value is, the higher the position is, and the downward adjustment is needed. The operation method when the scale of the measuring scale is a reverse scale (the reading is changed from big to small) is opposite to the operation method; the hydraulic lifting appliance is adjusted repeatedly until the levelness meets the requirement; when the deviation of the display values on 3 rulers is required to be less than 5mm, the levelness of the protective steel structure is qualified, and the hoisting work of the protective steel structure can be directly carried out.
The invention solves the problems of repeated adjustment of the screw nut of the basket screw of the original lifting appliance and repeated lifting of the ring crane, and realizes the direct length adjustment of the lifting appliance in a lifting state. The problem of former hoist levelness measurement and jib length adjustment unsynchronized is solved. The device can be popularized and applied in the related work of the same type of units. The hydraulic lifting appliance with the protective steel structure for the reactor can be popularized to lifting work of other similar equipment in a power station.
The present invention has been described in detail with reference to the drawings and examples, but the present invention is not limited to the examples, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention. The prior art can be adopted in the content which is not described in detail in the invention.
Claims (6)
1. The utility model provides a nuclear power station reactor protective steel structure hydraulic lifting device which characterized in that includes: the hydraulic valve group (3), the flower basket nut (4), the positioning nut (5), the lower support hanger (7), the upper support hanger (10), the shaft type piston (12) and the hydraulic oil cylinder (19); the hydraulic support device is characterized in that the lower support hanging piece (7) is fixedly connected to the lower end of a hydraulic oil cylinder (19), a shaft type piston (12) is arranged inside the hydraulic oil cylinder (19), one end of the shaft type piston (12) is connected with the upper support hanging piece (10) through a positioning nut (5) and a basket nut (4), and the hydraulic valve group (3) is fixedly arranged on the lower portion of the hydraulic oil cylinder (19).
2. The hydraulic lifting appliance of the protective steel structure of the nuclear power plant reactor of claim 1, wherein: the lower support hanger (7) comprises: the lower support hanger (7) is provided with a positioning pin hole A at one end which is not connected with the hydraulic oil cylinder (19); and the lower fixed pin shaft (1) penetrates through the positioning pin hole A and is fixed on the lower support hanger (7).
3. The hydraulic lifting appliance of the protective steel structure of the nuclear power plant reactor, according to claim 2, is characterized in that: the upper support hanger (10) includes: the positioning pin hole B is formed in one end, which is not connected with the shaft type piston (12), of the upper supporting hanging piece (10); and the upper fixed pin shaft (2) penetrates through the positioning pin hole B and is fixed on the upper supporting hanger (10).
4. The hydraulic lifting appliance of the protective steel structure of the nuclear power plant reactor of claim 1, wherein: the hydraulic cylinder (19) comprises: the oil cylinder comprises an oil cylinder lower body (8), an oil cylinder upper body (11), a fastening screw (13), an exhaust hole (14), an upper sealing component (15), a middle sealing component (16), a lower sealing component (18) and an oil filling hole (6); the lower oil cylinder body (8) is fixedly connected with the upper oil cylinder body (11); a fastening screw (13) is arranged on the oil cylinder upper body (11);
the shaft type piston (12) penetrates through the oil cylinder lower body (8) and the oil cylinder upper body (11); the lower sealing component (18) is arranged between the inner wall of the oil cylinder lower body (8) and the outer wall of the shaft type piston (12), and a middle sealing component (16) is also arranged in the oil cylinder lower body (8); the upper sealing assembly (15) is arranged between the inner wall of the oil cylinder upper body (11) and the outer wall of the shaft type piston (12); an oil through hole is also formed on the lower body (8) of the oil cylinder; the surface of the oil cylinder upper body (11) is also respectively provided with an exhaust hole (14) and an oil filling hole (6).
5. The hydraulic lifting appliance of the protective steel structure of the nuclear power plant reactor, according to claim 4, is characterized in that: the outer wall of the shaft type piston (12) is further sleeved with a spring (9), the lower part of the shaft type piston (12) is further provided with an annular thrust disc, the annular thrust disc is arranged inside the lower oil cylinder body (8) and is in contact with the inner wall of the lower oil cylinder body (8), and a piston separation sealing assembly (17) is arranged on the annular thrust disc.
6. The hydraulic lifting appliance of the protective steel structure of the nuclear power plant reactor, according to claim 5, is characterized in that: the hydraulic valve group (3) comprises: manual valves and electric valves; the hydraulic valve group (3) is fixed on a cylinder lower body (8) of the hydraulic cylinder (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011629261.1A CN112660985A (en) | 2020-12-31 | 2020-12-31 | Nuclear power station reactor protective steel structure hydraulic lifting appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011629261.1A CN112660985A (en) | 2020-12-31 | 2020-12-31 | Nuclear power station reactor protective steel structure hydraulic lifting appliance |
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| Publication Number | Publication Date |
|---|---|
| CN112660985A true CN112660985A (en) | 2021-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011629261.1A Pending CN112660985A (en) | 2020-12-31 | 2020-12-31 | Nuclear power station reactor protective steel structure hydraulic lifting appliance |
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| Country | Link |
|---|---|
| CN (1) | CN112660985A (en) |
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2020
- 2020-12-31 CN CN202011629261.1A patent/CN112660985A/en active Pending
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