CN220684422U - Lifting tool for removing blocking valve holding plate - Google Patents
Lifting tool for removing blocking valve holding plate Download PDFInfo
- Publication number
- CN220684422U CN220684422U CN202320992367.0U CN202320992367U CN220684422U CN 220684422 U CN220684422 U CN 220684422U CN 202320992367 U CN202320992367 U CN 202320992367U CN 220684422 U CN220684422 U CN 220684422U
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- tightening
- tightening force
- support
- plate
- gland
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- 230000000903 blocking effect Effects 0.000 title claims abstract description 30
- 210000004907 gland Anatomy 0.000 claims abstract description 28
- 238000003825 pressing Methods 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Details Of Valves (AREA)
Abstract
The utility model belongs to the technical field of power plant maintenance, and solves the problem of safe and nondestructive dismantling of a blocking valve traction plate; the tightening force pressing cover is pressed and positioned at the upper end of the valve body of the blocking valve through an annular concave table at the lower part, and the tightening force bracket is coaxially arranged at the upper end of the tightening force pressing cover; the tightening screw rod is penetrated and assembled with the central through hole of the tightening support from top to bottom and the central through hole of the tightening gland; the lower end part of the tightening screw is connected with a threaded blind hole preset at the upper end of the hold-down plate; the tightening nut is connected to the upper end of the tightening screw and is positioned above the tightening bracket. According to the lifting tool, the symmetrically arranged hydraulic cylinders are further increased through the matching mode of the screw rod and the screw threads, so that the pulling force of the holding-down plate vertically acts on the center of the pulling plate, lifting of the holding-down plate is realized under the condition of uniform stress, and the lifting tool has the advantage of safe operation.
Description
Technical Field
The utility model belongs to the field of power plant maintenance, and particularly relates to a lifting tool for removing a blocking valve holding plate.
Background
In the production function of a power plant, the blocking plate is additionally arranged on the inlet and outlet blocking valve of the reheater and the operation of recovering the diversion sleeve is required during each shutdown and overhaul period of the boiler. The maintenance personnel performs operation each time according to the process flow and the technical requirements. When the traction plate is removed, the traction plate cannot be easily lifted out by a chain block due to the running condition of equipment. The design hanging point of the original valve blocking factory is too small, and deformation is easy to generate when the stress is too large. Therefore, the team overhauling personnel hang the steel wire buckle on the lead screw of the holding-down plate to serve as a hanging point, and because the steel wire buckle and the chain block are matched to generate deviation, the holding-down plate is stressed unevenly, so that the compression ring on the outer side of the holding-down plate is extruded and deformed. In addition, therefore, traditional lifting mode can take place the broken link, and the hoisting point is tripped, causes staff's personal injury. The design needs to design a lifting tool which can realize even stress when the traction plate is detached and ensure the safety of the detaching operation.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide the lifting tool for dismounting the blocking valve holding plate, which has the advantages of simple structure, safe use and capability of providing uniform lifting force.
The above object of the present utility model is achieved by the following technical solutions:
a lifting tool for removing a blocking valve holding plate comprises a tightening gland, a tightening bracket, a tightening screw and a tightening nut; the tightening gland is an annular gland formed by a top plate and a lower annular edge, a central through hole for a tightening screw to pass through is formed in the center of the top plate, an annular concave table is formed in the bottom surface of the lower annular edge, and the outer diameter of the annular concave table is consistent with the outer diameter of the upper port of the valve body of the plug valve; the depth of the inner cavity of the tightening gland is larger than or equal to the thickness of the traction plate; the tightening force support is a vertical support, a central through hole for a tightening vertical screw rod to pass through is formed in the center of the tightening force support, and the upper end face and the lower end face of the tightening force support are both planes; the upper end of the tightening screw is provided with a force application head;
the tightening force pressing cover is pressed and positioned at the upper end of the valve body of the blocking valve through an annular concave table at the lower part, and the tightening force bracket is coaxially arranged at the upper end of the tightening force pressing cover; the tightening screw rod is assembled with the central through hole of the tightening support and the central through hole of the tightening gland from top to bottom in a penetrating way, and the lower end part of the tightening screw rod is connected with a threaded blind hole preset at the upper end of the holding-down plate; the tightening nut is connected to the upper end of the tightening screw and is located above the tightening support.
And a central circular groove is arranged at the upper end of the top plate of the tightening gland, and the diameter of the central circular groove is consistent with the outer diameter of the lower end part of the tightening support.
And the tightening force support is formed by welding two channel steels which are arranged in parallel and are opposite to each other through a bottom plate and a top plate, the upper connecting part of the top plate and the two channel steels forms the upper edge of the tightening force support, and the lower connecting part of the bottom plate and the two channel steels forms the lower edge of the tightening force support.
The hydraulic cylinder is characterized by further comprising two groups of tightening force cylinders, wherein the two groups of tightening force cylinders are symmetrically arranged on two sides of the tightening force bracket, and are vertically arranged in a mode that cylinder rods are upwards; two abdicating grooves are formed in the lower edge of the tightening force support, and the lower ends of cylinder barrels of the two groups of tightening force cylinders are respectively embedded into the two abdicating grooves and fixedly connected with the upper ends of the tightening force pressing covers; the cylinder rod ends of the two groups of tightening force cylinders are aligned with the upper edge and the lower end of the tightening force bracket.
And two lifting hooks are symmetrically and fixedly arranged at the upper end of the tightening gland.
The utility model has the advantages and positive effects that:
1. according to the utility model, the symmetrically arranged hydraulic cylinders are further added in a matching mode of the screw rod and the screw thread, so that the pulling force on the holding-down plate vertically acts on the center of the pulling-down plate, and the lifting of the holding-down plate under the condition of uniform stress is ensured. Therefore, the problem that the compression ring deforms due to the fact that the compression ring on the outer side of the traction plate is extruded in the prior art can be avoided.
2. According to the utility model, the lifting tool is directly positioned at the upper end of the valve body of the blocking valve, so that the close-range dismantling of the holding plate can be realized, and in the dismantling process, the self-locking of the screw thread connected with the nut through the screw rod is realized, so that the occurrence of piece falling and piece falling is avoided, and the safety of operation is ensured.
3. The lifting tool has the advantages of few components, simple connection and answering, portability and convenience in carrying and use during frequent work.
4. In the using process, the utility model has short operation stroke, can save the maintenance time and improve the maintenance efficiency.
Drawings
FIG. 1 is a schematic view of an embodiment of the present utility model in an initial position for lifting;
FIG. 2 is a schematic view of an embodiment of the present utility model in a lifting end position;
FIG. 3 is a block diagram of a tension bracket according to a first embodiment of the present utility model;
FIG. 4 is a schematic view of a second embodiment of the present utility model in an initial position for lifting;
FIG. 5 is a schematic illustration of a second embodiment of the present utility model during lifting;
FIG. 6 is a schematic view of a second embodiment of the present utility model in a final position;
FIG. 7 is a block diagram of a tension bracket in a second embodiment of the utility model;
in the figure: 1. a tightening gland; 2. a lifting hook; 3. a tightening support; 3.1, a top plate; 3.2, channel steel, 3.3 and chassis; 4. tightening the nut; 5. a tightening screw; 5.1, a force application head; 6. a valve body of the blocking valve; 7. a pulling plate; 8. and (5) a tightening oil cylinder.
Detailed Description
The structure of the present utility model will be further described by way of examples with reference to the accompanying drawings. It should be noted that the present embodiments are illustrative and not restrictive.
Embodiment one:
referring to fig. 1-3, the utility model relates to a lifting tool for removing a blocking valve holding plate, which comprises the following steps: comprises a tightening gland 1, a tightening bracket 3, a tightening screw 5 and a tightening nut 4.
The tightening force gland is an annular gland formed by a top plate and a lower annular edge, a central through hole is formed in the center of the top plate, and the diameter of the central through hole is slightly larger than the outer diameter of the tightening force screw rod so that the tightening force screw rod can freely pass through. An annular concave table is arranged on the bottom surface of the lower annular edge, and the outer diameter of the annular concave table is consistent with the outer diameter of the upper port of the valve body of the plug valve, so that the tight pressure cover is matched with the upper end of the valve body of the plug valve in a positioning way. In addition, be provided with central circular recess in the upper end of roof, this central circular recess supplies the lower extreme embedding of tight power support, realizes the location to tight power support. The depth of the inner cavity of the tight pressure cover is larger than or equal to the thickness of the traction plate.
The tightening force support is a vertical support provided with a central through hole, and the aperture of the central through hole is slightly larger than the outer diameter of the tightening force screw. The upper end face and the lower end face of the tightening support are both planar structures. In the utility model, the tightening force bracket is formed by welding two channel steel 3.2 which are arranged in parallel and are opposite to each other through the bottom plate 3.3 and the top plate 3.1, the upper connecting part of the top plate and the two channel steel forms the upper edge of the tightening force bracket, and the lower connecting part of the bottom plate and the two channel steel forms the lower edge of the tightening force bracket.
The upper end of the tightening screw is provided with a force application head 5.1, and the force application head is a square head and a hexagonal head and is used for sleeving a wrench to realize screwing and loosening operations on the tightening screw.
When the plugging valve holding plate is removed, the tightening force pressing cover is pressed and positioned at the upper end of the plugging valve body 6 through the annular concave table at the lower part, the tightening force support is arranged at the upper end of the tightening force pressing cover, the lower end of the tightening force support is embedded into the central annular groove on the tightening force pressing cover top plate, and the central through hole on the tightening force pressing cover is aligned with the central through hole on the tightening force support; and then sequentially penetrating the tightening screw rod through the central through hole of the tightening support and the central through hole of the tightening gland from top to bottom, when the lower end of the tightening screw rod reaches the upper end position of the traction plate to be dismantled, sleeving a spanner on the force application head at the upper end of the tightening screw rod, rotating the spanner to gradually screw the lower end of the tightening screw rod into a threaded blind hole preset at the upper end of the traction plate 7 until the tightening screw rod reaches a fastening state, screwing the tightening nut onto the tightening screw rod from the upper end, when the lower end of the tightening nut is contacted with the upper end of the tightening support, applying downward pressing force by the tightening gland, continuing to rotate the tightening nut, and under the upward action of the tightening screw rod, driving the friction force between the outer sealing part of the traction plate and the inner wall of the valve body of the blocking valve by the tightening screw rod, so as to slowly ascend, and when the blocking valve traction plate completely enters the inner cavity of the tightening gland, pulling the blocking valve body from the valve body. At this time, the lifting tool and the detached blocking valve dragging plate can be lifted and removed simultaneously through the lifting equipment on the operation site and the two lifting hooks 2 connected to the upper end of the tightening pressure cover, so that the detachment of the blocking valve dragging plate is completed.
Embodiment two:
according to the embodiment, on the basis of the first embodiment, two groups of tightening oil cylinders 8 are additionally arranged between the tightening gland and the upper edge of the tightening support, and the quick dismantling of the valve blocking traction plate can be realized through the actions of the two groups of tightening oil cylinders, so that the dismantling efficiency can be improved.
The concrete structure is as follows:
the two groups of tightening force oil cylinders are symmetrically arranged on two sides of the tightening force bracket, and are vertically arranged in a mode that cylinder rods are upward; two abdicating grooves 3.4 are arranged on the lower edge of the tightening support, the lower ends of cylinder barrels of the two groups of tightening cylinders are respectively embedded into the two abdicating grooves, and the lower ends of the two groups of tightening cylinders are fixedly connected with the upper ends of the tightening gland through screws. The cylinder rod ends of the two groups of tightening force cylinders are aligned with the upper edge and the lower end of the tightening force bracket.
The dismantling process of the embodiment is as follows:
when the valve blocking hold-down plate is dismounted, after a tension gland, two tension cylinders and a tension bracket are mounted at the upper end of a valve body of the valve blocking, according to the first embodiment, a tension bolt is fixedly connected with the hold-down plate to be dismounted through screw thread fit after passing through the tension bracket and a central through hole on the tension gland, and then a tension nut is screwed at a position contacted with the upper end of the tension gland from the upper end; and then starting two tightening oil cylinders, wherein cylinder rods of the two tightening oil cylinders extend upwards to be in contact with the lower ends of the upper edges of the tightening brackets, jacking up the tightening brackets upwards along with the extension of the cylinder rods, and transmitting acting force to the tightening screws through the connection of the tightening nuts and the tightening screws so that the tightening screws drive the valve blocking traction plates to move upwards. The dismantling process can be completed by one-time jacking of the two tightening cylinders, and can also be completed by multiple jacking of the tightening cylinders under the action of the cylinder stroke and the disassembly relieving force. Specifically, after the tightening oil cylinder is jacked up each time, when the cylinder rod is retracted, the tightening support synchronously descends along with the tightening oil cylinder under the action of weight, and after the lower end of the tightening support is contacted with the top surface of the tightening gland, at the moment, a distance is formed between the tightening nut and the upper end of the tightening support, and the tightening nut is rotated downwards to enable the lower end of the tightening nut to be contacted with the upper end of the tightening support again; and then starting the two tightening oil cylinders again to jack up the tightening support again, so as to drive the blocking valve dragging plate to ascend for a certain distance again, and carrying out the operation for a plurality of times according to the operation until the blocking valve dragging plate is completely lifted into the inner cavity of the tightening pressure cover, and detaching the blocking valve dragging plate from the blocking valve body. And the lifting tool and the detached blocking valve dragging plate can be lifted and removed simultaneously through lifting equipment in the follow-up process, so that the blocking valve dragging plate is detached.
In addition, in the second embodiment, the assembly disassembly mode can be formed by jacking two tightening cylinders or continuously screwing the tightening nuts on the tightening pressure cover as in the first embodiment.
Although the embodiments of the present utility model and the accompanying drawings have been disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit of the utility model and the appended claims, and therefore the scope of the utility model is not limited to the embodiments and the disclosure of the drawings.
Claims (5)
1. The utility model provides a lifting tool for removing choke valve hold-down plate which characterized in that: comprises a tightening gland, a tightening bracket, a tightening screw and a tightening nut; the tightening gland is an annular gland formed by a top plate and a lower annular edge, a central through hole for a tightening screw to pass through is formed in the center of the top plate, an annular concave table is formed in the bottom surface of the lower annular edge, and the outer diameter of the annular concave table is consistent with the outer diameter of the upper port of the valve body of the plug valve; the depth of the inner cavity of the tightening gland is larger than or equal to the thickness of the traction plate; the tightening force support is a vertical support, a central through hole for a tightening vertical screw rod to pass through is formed in the center of the tightening force support, and the upper end face and the lower end face of the tightening force support are both planes; the upper end of the tightening screw is provided with a force application head;
the tightening force pressing cover is pressed and positioned at the upper end of the valve body of the blocking valve through an annular concave table at the lower part, and the tightening force bracket is coaxially arranged at the upper end of the tightening force pressing cover; the tightening screw rod is assembled with the central through hole of the tightening support and the central through hole of the tightening gland from top to bottom in a penetrating way, and the lower end part of the tightening screw rod is connected with a threaded blind hole preset at the upper end of the holding-down plate; the tightening nut is connected to the upper end of the tightening screw and is located above the tightening support.
2. The lifting tool for removing a choke plate according to claim 1, characterized in that: the upper end of the top plate of the tightening gland is provided with a central circular groove, and the diameter of the central circular groove is consistent with the outer diameter of the lower end part of the tightening support.
3. The lifting tool for removing a choke plate according to claim 1, characterized in that: the tightening force support is formed by welding two channel steels which are arranged in parallel and are opposite to each other through a base plate and a top plate, the upper connecting part of the top plate and the upper parts of the two channel steels form the upper edge of the tightening force support, and the lower connecting part of the base plate and the lower parts of the two channel steels form the lower edge of the tightening force support.
4. A lifting tool for removing a choke plate according to claim 3, characterized in that: the two groups of tightening force cylinders are symmetrically arranged on two sides of the tightening force bracket, and the two groups of tightening force cylinders are vertically arranged in a mode that cylinder rods are upward; two abdicating grooves are formed in the lower edge of the tightening force support, and the lower ends of cylinder barrels of the two groups of tightening force cylinders are respectively embedded into the two abdicating grooves and fixedly connected with the upper ends of the tightening force pressing covers; the cylinder rod ends of the two groups of tightening force cylinders are aligned with the upper edge and the lower end of the tightening force bracket.
5. The lifting tool for removing a choke plate according to claim 1, characterized in that: two lifting hooks are symmetrically and fixedly arranged at the upper end of the tightening gland.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320992367.0U CN220684422U (en) | 2023-04-27 | 2023-04-27 | Lifting tool for removing blocking valve holding plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320992367.0U CN220684422U (en) | 2023-04-27 | 2023-04-27 | Lifting tool for removing blocking valve holding plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220684422U true CN220684422U (en) | 2024-03-29 |
Family
ID=90371024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320992367.0U Active CN220684422U (en) | 2023-04-27 | 2023-04-27 | Lifting tool for removing blocking valve holding plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220684422U (en) |
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2023
- 2023-04-27 CN CN202320992367.0U patent/CN220684422U/en active Active
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