CN217061214U - Tensile training of nuclear power station horizontal centrifugal pump king bolt and testing platform - Google Patents
Tensile training of nuclear power station horizontal centrifugal pump king bolt and testing platform Download PDFInfo
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- CN217061214U CN217061214U CN202123409965.0U CN202123409965U CN217061214U CN 217061214 U CN217061214 U CN 217061214U CN 202123409965 U CN202123409965 U CN 202123409965U CN 217061214 U CN217061214 U CN 217061214U
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Abstract
The utility model belongs to the field of nuclear power station training and detection, in particular to a main bolt stretching training and detection platform of a horizontal centrifugal pump of a nuclear power station, which is convenient to install, has strong economic applicability and can be widely applied to the stretching training work of the bolts of the horizontal pump; the training mode is changed from theory to practice, the former theoretical training is changed into practice training, and the effect is remarkable; the special tool for measuring the stretching amount of the standard rod and the bolt can accurately measure the actual stretching result of the bolt; can be used as a human error prevention training platform with own characteristics.
Description
Technical Field
The application belongs to the technical field of nuclear power station training and detection, and particularly relates to a tensile training and detection platform for a main bolt of a horizontal centrifugal pump of a nuclear power station.
Background
A certain nuclear power station is equipped with more than 50 horizontal centrifugal pumps in one stage of engineering, and an important process is involved in the pump disassembly and maintenance process, namely, a main bolt of a pump cover at an outlet side is disassembled and fastened. In order to ensure that the fastening degree of each bolt is consistent, a hydraulic pump station and a bolt stretcher need to be used for stretching the main bolt of the pump cover in maintenance procedures.
The horizontal centrifugal pump in the nuclear island plant is in a severe environment, the radiation dose of a working area is high, the equipment and pipeline arrangement is complicated and complicated, the operation space is narrow, the overhauling skill is not skilled, the overhauling time is increased, and the overhauling collective dose is also increased. The main bolt of the horizontal centrifugal pump is transversely stretched, and compared with the stretching of the main joint surface bolt of the vertical pump, the horizontal stretching has higher working strength and difficulty and higher requirement on the skill of a maintainer.
The staff who participates in pump disintegration maintenance does not generally have the operation experience of bolt stretcher, and the training work before the pump maintenance only carries out theoretical training through explaining the stretcher description, and the training effect is relatively poor, and the maintainer can not master operation main points and notes in the actual work, and the very easy people that takes place causes equipment damage and bodily injury because of the error.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a tensile training of nuclear power station centrifugal pump kingbolt and testing platform, solve the maintenance personal and can not master the operation main points and notice in the actual work, the very easy problem that causes equipment damage and bodily injury because of the error of people that takes place.
The technical scheme for realizing the purpose of the application is as follows:
the embodiment of the application provides a tensile training of nuclear power station centrifugal pump kingbolt and testing platform, the platform includes: the device comprises a rack, a support frame, a flange simulator, a pump cover simulator and a main bolt;
the support frame is fixed on the rack and used for supporting and fixing the flange simulator;
the pump cover simulation body is fastened on the flange simulation body through the main bolt;
the measuring device is characterized in that a measuring through hole penetrating through the front end and the rear end is formed in the main bolt, a standard rod is arranged in the measuring through hole, and the standard rod is fixed with the rear end of the main bolt.
Optionally, the support frame includes: the positioning plate and the supporting plate are vertically fixed on the bottom plate;
the positioning plate and the supporting plate are parallel to each other and are respectively provided with a circular through hole which is oppositely arranged and has the same diameter with the flange simulation body;
the flange simulator penetrates through the positioning plate and the circular through holes in the supporting plate, and the bottom of the flange simulator is welded with the positioning plate.
In the alternative,
the upper parts of the positioning plate and the supporting plate are chamfered.
Alternatively to this, the first and second parts may,
and the main bolt is matched with a spherical gasket and a nut to fasten the pump cover simulator on the flange simulator.
In the alternative,
the king bolt is made of heat treated high strength alloy steel.
Alternatively to this, the first and second parts may,
and the standard rod is fixed with the rear end of the main bolt in a threaded fit manner.
Optionally, the platform further includes: a dust cap;
and the dustproof cap is used for sealing the measuring through hole.
Optionally, the platform further includes: a bolt tensile strength measuring tool;
and the bolt tensile strength measuring tool is used for inserting the measuring through hole to measure the depth of the standard rod in the main bolt.
Alternatively to this, the first and second parts may,
the bolt tensile strength measuring tool is a dial indicator component.
The beneficial technical effect of this application lies in:
(1) the main bolt stretching training and detecting platform for the horizontal centrifugal pump of the nuclear power station, which is provided by the embodiment of the application, is convenient to install, high in economic applicability and capable of being widely applied to bolt stretching training work of the horizontal pump; the training mode is changed from theory to practice, the former theoretical training is changed into practice training, and the effect is remarkable; the special tool for measuring the stretching amount of the standard rod and the bolt can accurately measure the actual stretching result of the bolt; can be used as a human error prevention training platform with self characteristics.
(2) The utility model provides a tensile training of nuclear power station centrifugal pump horizontal axis owner bolt and testing platform, its design and technical scheme fully consider the influence that human error caused to personal safety and equipment, use and consciousness through many-sided training personnel such as three-phase interchange, self-checking prevent the human error instrument, have ensured the maintenance quality of important equipment key work step, reduce collective dosage value.
(3) The tensile training of nuclear power station centrifugal pump king bolt and testing platform that this application embodiment provided effectively avoids because the risk that the stretcher damaged or damaged the king bolt that misoperation caused, has reduced personnel, equipment risk, has improved the reliability of operation.
Drawings
Fig. 1 is a schematic structural diagram of a tension training and detecting platform for a main bolt of a horizontal centrifugal pump of a nuclear power plant according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of another tension training and detecting platform for a main bolt of a horizontal centrifugal pump of a nuclear power plant according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a stretching training and detecting platform for a king bolt of a horizontal centrifugal pump of a nuclear power plant according to an embodiment of the present application.
In the figure:
1-a rack;
2-a support frame; 21-a bottom plate; 22-a positioning plate; 23-a support plate;
3-a flange analogue;
4-a pump cover simulator;
5-a main bolt; 51-measuring through holes; 52-standard bar; 53-spherical spacer; 54-a nut; 55-dust cap;
6-bolt tension measuring tool; 7-bolt stretching machine.
Detailed Description
In order to make the technical solutions in the embodiments of the present application more comprehensible to those skilled in the art, the following description will be made in detail and completely with reference to the accompanying drawings in the embodiments of the present application. It should be apparent that the embodiments described below are only some of the embodiments of the present application, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments described herein without inventive step, are within the scope of the present application.
Because the maintenance personnel can not master the operating point and attention in the actual work, in whole tensile working process, often can appear following problem:
when the bolt stretcher is installed, the nut connector is not meshed with the main nut, and the bolt stretcher is not installed in place, so that the waste of labor and time is caused; after the pump station releases the pressure, the return spring of the hydraulic cylinder piston is abnormal, so that the piston cannot fall back freely, and the hydraulic cylinder exceeds the stroke and is even damaged when the next main bolt is stretched continuously, so that the safety of equipment and personnel is threatened; when the main nut transmission unit is screwed, a maintenance worker applies too much force to damage a transmission gear and damage a tool; when the main nut is disassembled, the gap reserved on the contact surface of the hydraulic cylinder support and the pump cover flange is unreasonable, so that the piston of the hydraulic cylinder and the main nut are squeezed, and a tool cannot be disassembled; the hydraulic pump station is not completely decompressed, and the piston of the hydraulic cylinder cannot return to the original position after the oil pipe is pulled out;
aiming at the defects of the existing training and checking modes, the embodiment of the application provides a tension training and detecting platform for the main bolt of the horizontal centrifugal pump of the nuclear power station. The platform can truly and effectively simulate the actual operation process of stretching the main bolt of the horizontal centrifugal pump, and optimizes the special tool and the measurement method for measuring the bolt stretching amount, the device can enable maintenance personnel to gradually improve the proficiency degree of the stretcher in use through repeated operation, master the operation key and the attention, effectively avoid the risk that the hydraulic cylinder of the stretcher is damaged or the main bolt is damaged due to improper operation, improve the maintenance work efficiency, reduce the collective dosage, ensure the maintenance quality of important equipment key work steps, and simultaneously provide an innovative platform for the implementation of skill ratio and training.
Based on the above, in order to clearly and specifically explain the above advantages of the present application, the following description of the embodiments of the present application will be made with reference to the accompanying drawings.
Referring to fig. 1, the drawing is a schematic structural diagram of a tension training and detecting platform for a main bolt of a horizontal centrifugal pump in a nuclear power plant according to an embodiment of the present application.
The utility model provides a tensile training of nuclear power station centrifugal pump kingbolt and testing platform includes: the device comprises a rack 1, a support frame 2, a flange simulator 3, a pump cover simulator 4 and a main bolt 5;
the support frame 2 is fixed on the rack 1 and used for supporting and fixing the flange simulator 3;
the pump cover simulation body 4 is fastened on the flange simulation body 3 through a main bolt 5;
a measuring through hole 51 penetrating through the front end and the rear end is formed in the main bolt 5, a standard rod 52 is arranged in the measuring through hole 51, and the standard rod 52 is fixed with the rear end of the main bolt 5, as shown in fig. 2.
It should be noted that, because the standard rod 52 is elongated and has a high precision requirement, and is easily deformed by the influence of the cutting force during the turning process, in the specific implementation, the standard rod 52 meeting the requirements of the pattern can be successfully completed by changing the clamping manner, replacing the turning tool and controlling the turning amount.
As an example, the standard lever 52 is fixed to the rear end of the main bolt 5 by screw-fitting.
In some possible implementations of the embodiment of the present application, the supporting frame 2 includes: a bottom plate 21, and a positioning plate 22 and a supporting plate 23 vertically fixed on the bottom plate 21;
the positioning plate 22 and the supporting plate 23 are parallel to each other, and are provided with circular through holes which are arranged oppositely and have the same diameter with the flange simulator 3;
the flange analog body 3 passes through the circular through holes on the positioning plate 22 and the supporting plate 23, and the bottom of the flange analog body is welded with the positioning plate 22.
In practice, the bottom plate 21 may be fastened to the gantry 1 by 4 bolts. In one example, the upper portions of the positioning plate 22 and the support plate 23 are chamfered.
In some possible implementations of the embodiment of the present application, as shown in fig. 2, the main bolt 5 cooperates with the spherical washer 53 and the nut 54 to fasten the pump cover simulator 4 to the flange simulator 3.
In a particular embodiment, the main bolt 5 may be made of a high strength alloy steel that has been heat treated to meet the strength and toughness requirements of the bolt in tension.
In some possible implementation manners of the embodiment of the present application, as shown in fig. 2, the platform may further include: a dust cap 55;
and a dust cap 55 for sealing the front end of the measuring through-hole 51.
In some possible implementation manners of the embodiment of the present application, as shown in fig. 1, the platform may further include: a bolt tensile strength measuring tool 6;
and a bolt tension measuring tool 6 for inserting the measuring through hole 51 to measure the depth of the master rod 52 in the master bolt 5.
As an example, the bolt elongation measuring tool 6 is a dial gauge assembly.
When the bolt stretching amount measuring tool 6 is specifically implemented, the dial indicator assembly can be assembled and positioned through the special support, before the bolt is stretched, the dial indicator assembly is required to fall on the horizontal support to be zeroed, then the dial indicator assembly is placed into the spindle nose side measuring through hole 51 of the main bolt 5 to measure the depth of the standard rod 52, and recording is carried out. The stretching work is completed by assembling a bolt stretching machine, a pump station, a pressure gauge, a torque wrench and the like, the depth of the standard rod 52 is measured by using the bolt stretching amount measuring tool 6 again after the stretching is completed, and the depth is subtracted from the numerical value before the stretching to obtain the stretching amount.
The following describes in detail a stretching process of a main bolt stretching training and detecting platform of a horizontal centrifugal pump of a nuclear power plant provided in an embodiment of the present application with reference to a specific example, and refer to fig. 3.
When in use, in the first step, the standard rod 52 is screwed into the measuring through hole 51 of the main bolt 5, the main bolt 5 is screwed into the flange simulator 3, and the whole half turn is adjusted back after the main bolt is screwed to the bottom;
step two: sleeving the pump cover simulation body 4 on the main bolt 5, and installing two spherical gaskets 53 and nuts 54;
step three: connecting the bolt stretcher 7 and the high-pressure oil pipe with a pump station through a quick joint, and communicating the pump station with a power supply;
step four: the dust cap 55 is opened, the bolt tension measurement dedicated tool 6 is zeroed on the horizontal platform, and the tool is put into the measurement hole, and the raw data L1 is recorded.
Step five: when the nut 54 is fastened, the bolt stretcher 7 is horizontally screwed on the main bolt 5, the nut connector is ensured to be meshed with the nut 54 through mutual matching of two persons, and the bolt stretcher 7 is screwed to be attached to the pump cover simulator 7;
step six: screwing a pump station pressure relief valve, opening a pump station switch until the reading of a pressure gauge meets the requirement, and observing the hydraulic cylinder over-stroke in the pressurizing process to warn that a red line cannot be exposed; screwing the main nut transmission unit by using a torque wrench, and setting a torque value according to requirements; slowly opening a pressure relief valve of a pump station until the reading of a pressure gauge is 0, screwing out the bolt stretcher 7, putting the special bolt stretching amount measuring tool 6 into a measuring hole, and recording stretched data L2;
step seven: calculating the difference between L2 and L1 to obtain the bolt stretching amount L3;
step eight: horizontally screwing the bolt stretcher 7 into the main bolt 5, ensuring that the nut connector is meshed with the nut 54 through mutual matching of two persons, screwing the bolt stretcher 7 to be attached to the pump cover simulating body 4, and adjusting back by a certain amount to ensure that a certain gap is reserved on the contact surface of the bolt stretcher 7 and the pump cover simulating body 4, so as to prevent a piston of a hydraulic cylinder and the nut 54 from being seized after pressure relief;
step nine: screwing a pump station pressure relief valve, opening a pump station switch until the indication number of a pressure gauge is a required value, and observing the hydraulic cylinder over-stroke in the pressurizing process to warn that a red line cannot be exposed;
step ten: loosening the main nut transmission unit by using a ratchet wheel; and slowly opening a pressure relief valve of the pump station until the reading of the pressure gauge is 0, and screwing out the bolt stretcher 7.
The present application has been described in detail with reference to the drawings and examples, but the present application is not limited to the above examples, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application. The prior art can be used for all the contents which are not described in detail in the present application.
Claims (9)
1. The utility model provides a tensile training of nuclear power station centrifugal pump king bolt and testing platform which characterized in that, the platform includes: the device comprises a rack, a support frame, a flange simulator, a pump cover simulator and a main bolt;
the support frame is fixed on the rack and used for supporting and fixing the flange simulator;
the pump cover simulation body is fastened on the flange simulation body through the main bolt;
the measuring device is characterized in that a measuring through hole penetrating through the front end and the rear end is formed in the main bolt, a standard rod is arranged in the measuring through hole, and the standard rod is fixed with the rear end of the main bolt.
2. The tension training and detection platform for the main bolt of the horizontal centrifugal pump of the nuclear power station as recited in claim 1, wherein the support frame comprises: the positioning plate and the supporting plate are vertically fixed on the bottom plate;
the positioning plate and the supporting plate are parallel to each other and are provided with circular through holes which are oppositely arranged and have the same diameter with the flange simulation body;
the flange simulator penetrates through the positioning plate and the circular through holes in the supporting plate, and the bottom of the flange simulator is welded with the positioning plate.
3. The tension training and detection platform for the main bolt of the horizontal centrifugal pump of the nuclear power plant as recited in claim 2,
the upper parts of the positioning plate and the supporting plate are chamfered.
4. The tension training and detection platform for the main bolt of the horizontal centrifugal pump of the nuclear power plant as recited in claim 1,
and the main bolt is matched with the spherical gasket and the nut to fasten the pump cover simulating body on the flange simulating body.
5. The tension training and detection platform for the main bolt of the horizontal centrifugal pump of the nuclear power plant as recited in claim 4,
the king bolt is made of heat treated high strength alloy steel.
6. The tension training and detection platform for the main bolt of the horizontal centrifugal pump of the nuclear power plant as recited in claim 1,
and the standard rod is fixed with the rear end of the main bolt in a threaded fit manner.
7. The tension training and detection platform for the main bolt of the horizontal centrifugal pump of the nuclear power plant as recited in claim 1, further comprising: a dust cap;
and the dustproof cap is used for sealing the measuring through hole.
8. The tension training and detection platform for the main bolt of the horizontal centrifugal pump of the nuclear power plant as claimed in any one of claims 1 to 7, further comprising: a bolt tension measuring tool;
and the bolt tensile strength measuring tool is used for inserting the measuring through hole to measure the depth of the standard rod in the main bolt.
9. The tension training and testing platform for the main bolt of the horizontal centrifugal pump of the nuclear power plant as recited in claim 8,
the bolt tensile strength measuring tool is a dial indicator component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123409965.0U CN217061214U (en) | 2021-12-31 | 2021-12-31 | Tensile training of nuclear power station horizontal centrifugal pump king bolt and testing platform |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123409965.0U CN217061214U (en) | 2021-12-31 | 2021-12-31 | Tensile training of nuclear power station horizontal centrifugal pump king bolt and testing platform |
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| CN217061214U true CN217061214U (en) | 2022-07-26 |
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| CN202123409965.0U Active CN217061214U (en) | 2021-12-31 | 2021-12-31 | Tensile training of nuclear power station horizontal centrifugal pump king bolt and testing platform |
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