CN211103774U - Device for quickly disassembling long screw nut of heat exchanger - Google Patents
Device for quickly disassembling long screw nut of heat exchanger Download PDFInfo
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- CN211103774U CN211103774U CN201921510019.5U CN201921510019U CN211103774U CN 211103774 U CN211103774 U CN 211103774U CN 201921510019 U CN201921510019 U CN 201921510019U CN 211103774 U CN211103774 U CN 211103774U
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- long screw
- screw nut
- heat exchanger
- sleeve
- inner hexagonal
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Abstract
The utility model relates to a technical field is demolishd to the nut, specifically discloses a dismantle device of heat exchanger long screw nut fast, and long screw nut is dismantling the in-process with spiral rebound, and the long screw nut who removes utilizes the interaction force between the screw to promote the washer up movement that wear-resistants, and then drives interior hexagonal casting upward movement to make the synchronous rebound of sleeve, finally make long screw nut screw out from the heat exchanger long screw, reach the purpose of dismantling long screw nut. Adopt the utility model discloses the device is dismantled long screw nut, only needs a maintainer to independently accomplish, and the manual mode of demolising before the time is demolishd to every nut is reducible to original third, and the manpower demand reduces for the manual half of demolising, has greatly improved work efficiency, has reduced operating time, ensures that the unit state is controllable, and safe and reliable.
Description
Technical Field
The utility model belongs to the technical field of the nut is demolishd, concretely relates to dismantle device of heat exchanger long screw nut fast.
Background
The RRI/SEC plate heat exchanger is a main device used for cooling various heat exchangers in a nuclear island in a nuclear power plant, and the RRI/SEC plate heat exchanger is used for secondarily cooling heat of the nuclear island heat exchanger through an important service water System (SEC) and transferring the heat to a final heat sink, namely sea, of the nuclear power plant. Meanwhile, the RRI/SEC plate heat exchanger can form a barrier between each heat exchanger of the nuclear island and seawater, so that radioactive water is prevented from polluting the seawater, and seawater can be prevented from corroding equipment of the nuclear island.
During the normal operation of the nuclear power plant, the plate heat exchanger needs to be disassembled for maintenance due to defects of the heat exchanger or the maintenance requirement of PM. The disassembly and maintenance work of the plate heat exchanger relates to a first group I0 of a nuclear power plant, so that the maintenance work needs to be completed within 72 hours, otherwise, because an equipment cold source is unavailable, the unit state needs to be withdrawn according to the requirement of an operation technical specification. In the process of disassembling the heat exchanger, the disassembly work of the long screw nut is important work.
The general long screw nut dismantles the mode and utilizes dual-purpose spanner to remove it slowly for the manual work, and this mode mainly has following problem:
1) because the size of the nut is M56, the corresponding dual-purpose wrench has larger size, the length is 60cm generally, and the operation is not easy; in addition, the weight of the wrench is heavier, the long-term operation of personnel is easy to generate fatigue, and the risk of mechanical injury of the personnel exists;
2) when the nut is disassembled, the operation space is limited, the dual-purpose wrench needs to be repeatedly disassembled and assembled when the nut is unscrewed, and the operation process is very complicated;
3) the long screw of the plate heat exchanger is about 3.5m long, if the nut needs to be removed, the nut stroke is about 1.5m, each nut needs to be removed for about 20 minutes, and two maintainers need to be matched for removal.
Disclosure of Invention
An object of the utility model is to provide a dismantle device of heat exchanger long screw nut fast to greatly reduce the manpower demand.
The technical scheme of the utility model as follows:
a device for quickly disassembling a long screw nut of a heat exchanger is characterized in that the long screw nut is connected to the outer part of a long screw of the heat exchanger through threads, and the long screw nut and the long screw are used in a matched mode and serve as important fastening parts of the heat exchanger; comprises an inner hexagonal casting, a sleeve, a detachable handrail and a pistol drill action point;
the sleeve is cylindrical and is sleeved outside the long screw rod and the long screw rod nut of the heat exchanger;
an inner hexagonal casting is arranged between the sleeve and the long screw nut, a helical gear is arranged on the outer side of the inner hexagonal casting and serves as a secondary gear, a standard regular hexagonal hole matched with the long screw nut is arranged on the inner side of the inner hexagonal casting, and the purpose of disassembling the long screw nut can be achieved by rotating the inner hexagonal casting;
a threaded hole is processed on the outer side wall of the sleeve and is used for being in threaded connection with a detachable handrail;
the upper part and the lower part of the action point of the pistol drill are both of cylindrical structures;
the center of the upper part of the action point of the pistol drill is provided with an action point which can be matched with a standard inner hexagonal wrench, and the outer side of the lower part of the action point of the pistol drill is provided with a helical gear which is used as a main gear;
the outer side wall of the sleeve is provided with a fixed block for mounting an action point of a pistol drill;
a groove is formed in the middle of the fixing block and used for placing the lower part of the action point of the pistol drill, one side of the groove, which is close to the sleeve, is communicated with the interior of the sleeve, so that a helical gear on the outer side of the lower part of the action point of the pistol drill is meshed with a helical gear of the inner hexagonal casting;
under the action of an electric pistol drill with an inner hexagonal wrench, a helical gear on the outer side of the lower part of an action point of the pistol drill rotates in the groove, and then the helical gear of the inner hexagonal casting is driven to rotate.
And an anti-wear washer is arranged between the inner hexagonal casting and the long screw nut, so that when the long screw nut continuously moves upwards in the unscrewing process, the inner hexagonal casting is prevented from being separated from the long screw nut.
And a circle of fixed ring is arranged on the inner side wall of the sleeve and used for supporting the inner hexagonal casting and preventing the inner hexagonal casting from falling off.
Two threaded holes are machined on the outer side wall of the sleeve at intervals of 90 degrees and used for screwing a detachable handrail, so that an operator can remove the long screw nut comfortably in different positions and directions according to needs.
The fixed block is arranged on the outer side wall of the sleeve and in the middle of the two threaded holes.
The diameter of the upper cylinder of the action point of the pistol drill is smaller than that of the lower cylinder.
The long screw rod, the long screw rod nut, the inner hexagonal casting, the sleeve and the wear-resistant washer of the heat exchanger are coaxial.
The long screw nut moves upwards in the disassembling process, the moving long screw nut pushes the wear-resistant washer to move upwards by utilizing the interaction force between the threads, and then the inner hexagonal casting is driven to move upwards, so that the sleeve is driven to move upwards synchronously, and finally the long screw nut is screwed out of the long screw of the heat exchanger, and the purpose of disassembling the long screw nut is achieved.
The beneficial effects of the utility model reside in that:
adopt the utility model discloses the device is dismantled long screw nut, only needs a maintainer to independently accomplish, and the manual mode of demolising before the time is demolishd to every nut is reducible to original third, and the manpower demand reduces for the manual half of demolising, has greatly improved work efficiency, has reduced operating time, ensures that the unit state is controllable, and safe and reliable.
Drawings
FIG. 1 is a schematic view of the internal structure of the apparatus;
FIG. 2 is a top view of the apparatus;
FIG. 3 is a perspective view of the apparatus;
FIG. 4 is a top view of the action point of the pistol drill;
fig. 5 is a side cross-sectional view of the point of action of the pistol drill.
In the figure: 1. a heat exchanger long screw; 2. a long screw nut; 3. an inner hexagonal casting; 4. a sleeve; 5. a detachable armrest; 6. a wear-resistant washer; 7. pistol drill point of action.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The device for quickly disassembling the long screw nut of the heat exchanger as shown in fig. 1 to 3 comprises an inner hexagonal casting 3, a sleeve 4, a detachable handrail 5, an anti-wear washer 6 and a pistol drill action point 7. The heat exchanger long screw 1 is used for fastening the inner plate of the plate heat exchanger, and the heat exchanger long screw 1 can provide support for the installation of a plate heat exchanger stretcher. The long screw nut 2 is connected with the exterior of the long screw 1 of the heat exchanger through threads, and the long screw nut and the long screw are matched for use and used as important fastening parts of the heat exchanger.
The sleeve 4 is cylindrical and is sleeved outside the long screw 1 and the long screw nut 2 of the heat exchanger. An inner hexagonal casting 3 is arranged between the sleeve 4 and the long screw nut 2, a helical gear is arranged on the outer side of the inner hexagonal casting 3 and serves as an auxiliary gear, a standard regular hexagonal hole matched with the long screw nut 2 is formed in the inner side of the inner hexagonal casting, and the purpose of disassembling the long screw nut 2 can be achieved by rotating the inner hexagonal casting 3.
An anti-wear washer 6 is arranged between the inner hexagonal casting 3 and the long screw nut 2, and when the long screw nut 2 continuously moves upwards in a screwing-loosening process, the inner hexagonal casting 3 is prevented from being separated from the long screw nut 2.
And a circle of fixed ring is arranged on the inner side wall of the sleeve 4 and used for supporting the inner hexagonal casting 3 and preventing the inner hexagonal casting from falling off.
Two threaded holes are machined on the outer side wall of the sleeve 4 at intervals of 90 degrees and used for screwing the detachable handrail 5, so that an operator can detach the long screw nut 2 comfortably in different positions and directions according to needs.
As shown in fig. 4 and 5, the upper part and the lower part of the action point 7 of the pistol drill are both in a cylinder structure, wherein the diameter of the upper cylinder is smaller than that of the lower cylinder. The center of the upper part of the action point 7 of the pistol drill is provided with an action point which can be matched with a standard inner hexagonal wrench, and the outer side of the lower part is provided with a helical gear which is used as a main gear.
And a fixed block is arranged on the outer side wall of the sleeve 4 and in the middle of the two threaded holes and used for installing a pistol drill action point 7. And a groove is processed in the middle of the fixing block and used for placing the lower part of the pistol drill action point 7, and one side of the groove, which is close to the sleeve 4, is communicated with the inside of the sleeve 4, so that a helical gear on the outer side of the lower part of the pistol drill action point 7 is meshed with a helical gear of the inner hexagonal casting 3. Under the action of an electric pistol drill provided with an inner hexagonal wrench, a helical gear on the outer side of the lower part of the pistol drill action point 7 rotates in the groove, and then the helical gear of the inner hexagonal casting 3 is driven to rotate.
The heat exchanger long screw 1, the long screw nut 2, the inner hexagonal casting 3, the sleeve 4 and the wear-resistant washer 6 are coaxial.
When the heat exchanger is used, an operator firstly installs a standard inner hexagon wrench on the electric pistol drill, then sleeves the sleeve 4 on the long screw rod 1 of the heat exchanger, and selects a comfortable operation position to install the detachable handrail 5 on the sleeve 4; an operator operates the electric pistol drill equipped with the socket head wrench, so that the pistol drill action point 7 rotates, and the socket head casting 3 is driven to rotate. Because the long screw nut 2 moves the screw upwards in the dismounting process, the moving long screw nut 2 pushes the wear-resistant washer 6 to move upwards by utilizing the interaction force among the threads, and then drives the inner hexagonal casting 3 to move upwards, so that the sleeve 4 is enabled to move upwards synchronously, and finally the long screw nut 2 is screwed out of the long screw 1 of the heat exchanger, thereby achieving the purpose of dismounting the long screw nut 2.
Claims (8)
1. A device for quickly disassembling a long screw nut of a heat exchanger is characterized in that the exterior of a long screw (1) of the heat exchanger is connected with a long screw nut (2) through threads, and the long screw nut are matched for use and serve as important fastening parts of the heat exchanger; the method is characterized in that: comprises an inner hexagonal casting (3), a sleeve (4), a detachable handrail (5) and a pistol drill action point (7);
the sleeve (4) is cylindrical and is sleeved outside the long screw (1) and the long screw nut (2) of the heat exchanger;
an inner hexagonal casting (3) is arranged between the sleeve (4) and the long screw nut (2), a helical gear is arranged on the outer side of the inner hexagonal casting (3) and serves as an auxiliary gear, a standard regular hexagonal hole matched with the long screw nut (2) is arranged on the inner side of the inner hexagonal casting, and the purpose of disassembling the long screw nut (2) can be achieved by rotating the inner hexagonal casting (3);
a threaded hole is processed on the outer side wall of the sleeve (4) and is used for screwing a detachable handrail (5);
the upper part and the lower part of the action point (7) of the pistol drill are both of cylindrical structures;
the center of the upper part of the action point (7) of the pistol drill is provided with an action point which can be matched with a standard inner hexagonal wrench, and the outer side of the lower part of the action point is provided with a helical gear which is used as a main gear;
a fixed block is arranged on the outer side wall of the sleeve (4) and used for mounting an action point (7) of a pistol drill;
a groove is processed in the middle of the fixed block and used for placing the lower part of the pistol drill action point (7), one side of the groove close to the sleeve (4) is communicated with the interior of the sleeve (4), so that a helical gear on the outer side of the lower part of the pistol drill action point (7) is meshed with a helical gear of the inner hexagonal casting (3);
under the action of an electric pistol drill with an inner hexagonal wrench, a helical gear on the outer side of the lower part of an action point (7) of the pistol drill rotates in the groove, and then the helical gear of the inner hexagonal casting (3) is driven to rotate.
2. The device for quickly disassembling the long screw nut of the heat exchanger according to claim 1, wherein: an anti-wear washer (6) is arranged between the inner hexagonal casting (3) and the long screw nut (2), and when the long screw nut (2) continuously moves upwards in the unscrewing process, the inner hexagonal casting (3) is prevented from being separated from the long screw nut (2).
3. The device for quickly disassembling the long screw nut of the heat exchanger according to claim 2, wherein: and a circle of fixed ring is arranged on the inner side wall of the sleeve (4) and used for supporting the inner hexagonal casting (3) and preventing the inner hexagonal casting from falling off.
4. The device for quickly disassembling the long screw nut of the heat exchanger according to claim 3, wherein: two screw holes are machined on the outer side wall of the sleeve (4) at intervals of 90 degrees and used for screwing the detachable handrail (5), so that an operator can detach the long screw nut (2) comfortably in different positions and directions according to needs.
5. The device for quickly disassembling the long screw nut of the heat exchanger according to claim 4, wherein: the fixed block is arranged on the outer side wall of the sleeve (4) and in the middle of the two threaded holes.
6. The device for quickly disassembling the long screw nut of the heat exchanger according to claim 5, wherein: the diameter of the upper cylinder of the action point (7) of the pistol drill is smaller than that of the lower cylinder.
7. The device for quickly disassembling the long screw nut of the heat exchanger according to claim 6, wherein: the heat exchanger long screw (1), the long screw nut (2), the inner hexagonal casting (3), the sleeve (4) and the wear-resistant washer (6) are coaxial.
8. The device for quickly disassembling the long screw nut of the heat exchanger according to claim 7, wherein: as the long screw nut (2) moves upwards in the disassembling process, the moving long screw nut (2) pushes the anti-wear washer (6) to move upwards by utilizing the interaction force among the threads, and further drives the inner hexagonal casting (3) to move upwards, so that the sleeve (4) is enabled to move upwards synchronously, and finally the long screw nut (2) is screwed out from the long screw (1) of the heat exchanger, thereby achieving the purpose of disassembling the long screw nut (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921510019.5U CN211103774U (en) | 2019-09-11 | 2019-09-11 | Device for quickly disassembling long screw nut of heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921510019.5U CN211103774U (en) | 2019-09-11 | 2019-09-11 | Device for quickly disassembling long screw nut of heat exchanger |
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| Publication Number | Publication Date |
|---|---|
| CN211103774U true CN211103774U (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921510019.5U Active CN211103774U (en) | 2019-09-11 | 2019-09-11 | Device for quickly disassembling long screw nut of heat exchanger |
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| CN (1) | CN211103774U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110561344A (en) * | 2019-09-11 | 2019-12-13 | 福建福清核电有限公司 | device for quickly disassembling long screw nut of heat exchanger |
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2019
- 2019-09-11 CN CN201921510019.5U patent/CN211103774U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110561344A (en) * | 2019-09-11 | 2019-12-13 | 福建福清核电有限公司 | device for quickly disassembling long screw nut of heat exchanger |
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