CN212962994U - Plug for heat transfer pipe of heat exchanger - Google Patents
Plug for heat transfer pipe of heat exchanger Download PDFInfo
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- CN212962994U CN212962994U CN202020946008.8U CN202020946008U CN212962994U CN 212962994 U CN212962994 U CN 212962994U CN 202020946008 U CN202020946008 U CN 202020946008U CN 212962994 U CN212962994 U CN 212962994U
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Abstract
The utility model belongs to the technical field of nuclear power maintenance, concretely relates to end cap for stifled pipe of heat-transfer pipe of heat exchanger. In the embodiment of the disclosure, the body and the cam form an eccentric structure, so that when the screw is rotated, the cam can rotate eccentrically relative to the body around the pin shaft under the action of self weight, and the outer contours of the cam and the body are engaged on the inner wall of the heat transfer pipe to form a support; on this basis, the screw is by continuously under the rotatory condition of direction to the body, and the taper structure of the screw other end props big with the opening external diameter of the body other end for the other end of body forms the shutoff to the heat transfer pipe, and convenient operation, shutoff are effectual, and do not need too big operating space, can accomplish the stifled pipe operation of heat transfer pipe exit both sides in limited space from this on one side of the heat transfer pipe.
Description
Technical Field
The utility model belongs to the technical field of the nuclear power maintenance, concretely relates to end cap that is used for stifled pipe of heat exchanger heat-transfer pipe.
Background
During the operational life of a shell-and-tube heat exchanger, breakage of the heat transfer tubes cannot be completely avoided. It is therefore necessary to seal off both ends of individual heat transfer tubes that have been damaged or defective (hereinafter referred to as "plugged tubes") to allow them to be taken out of service, thereby ensuring safe and reliable operation of the heat exchanger.
In the related art, the pipe plugging technique may include welding pipe plugging, explosion pipe plugging, mechanical pipe plugging, etc., and in the above technique, it is generally required to perform pipe plugging operations on both sides of the heat transfer pipe of the heat exchanger. However, under the condition that the operation space on one side of the shell-and-tube heat exchanger is limited or the condition that the end socket on one side of the shell-and-tube heat exchanger is inconvenient to disassemble and assemble, the pipe blocking is difficult to implement, so how to realize effective pipe blocking in the limited operation space becomes a technical problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problems in the prior art, the plug for blocking the heat transfer pipe of the heat exchanger is provided.
According to an aspect of the disclosed embodiments, there is provided a plug for plugging a heat exchanger heat transfer pipe, the plug comprising: a pin, a cam, a body, and a screw;
the cam is provided with an eccentric through hole along the axial direction, and the pin shaft is inserted into the eccentric through hole in a penetrating manner;
one end of the pin shaft extending out of the eccentric through hole is fixedly connected with one end of the body;
the other end of the body is provided with an opening, and a threaded hole is formed in the position, facing the opening, in the body;
one end of the screw is in threaded connection with the threaded hole, and the other end of the screw is provided with a conical structure;
under the condition that the center of the cam is coincident with the center of the body, the plug for plugging the heat transfer pipe of the heat exchanger can enter the heat transfer pipe;
the plug for plugging the heat transfer pipe of the heat exchanger is positioned in the heat transfer pipe, and under the condition that the screw is continuously rotated, the cam can rotate eccentrically relative to the body around the pin shaft under the action of self weight until the cam and the outer contour of the body are clamped on the inner wall of the heat transfer pipe;
the cam and the outer contour of the body are clamped on the inner wall of the heat transfer pipe, and under the condition that the screw is continuously rotated towards the direction of the body, the conical structure at the other end of the screw expands the outer diameter of the opening at the other end of the body, so that the other end of the body forms a plug for the heat transfer pipe.
In a possible implementation manner, the screw is a socket head cap screw, and the plug for plugging the heat transfer tube of the heat exchanger further includes: a hexagonal wrench;
the hexagonal wrench is used for screwing the inner hexagonal screw.
In one possible implementation, the plug for plugging a heat transfer tube of a heat exchanger further comprises: connecting rod and moment spanner adaptation piece.
One end of the connecting rod is connected with the hexagonal wrench, and the other end of the connecting rod is connected with the torque wrench adapting block.
In one possible implementation manner, one end of the hexagon wrench is connected with the socket head cap screw through a wire clip or a magnet.
In a possible implementation manner, the plug for plugging the heat transfer pipe of the heat exchanger further comprises a conical clamping sleeve;
the conical clamping sleeve is sleeved at the other end of the screw to form a conical structure.
In a possible implementation manner, the other end of the pin shaft, which extends out of the eccentric hole, is provided with a baffle.
In a possible implementation manner, the outer side surface of the cam and the outer side surface of the body close to one end of the cam are provided with knurling.
In a possible implementation manner, the knurling arranged on the outer side surface of the cam and the outer side surface of the body close to one end of the cam are circumferential or axial knurling.
In a possible implementation manner, a knurling is formed on the outer side of the opening at the other end of the body.
In a possible implementation manner, the outer side surface of the other end of the body is provided with a circumferential knurling.
The beneficial effects of the utility model reside in that: in the embodiment of the disclosure, the body and the cam form an eccentric structure, so that when the screw is rotated, the cam can rotate eccentrically relative to the body around the pin shaft under the action of self weight, and the outer contours of the cam and the body are engaged on the inner wall of the heat transfer pipe to form a support; on this basis, the screw is by continuously under the rotatory condition of direction to the body, and the taper structure of the screw other end props big with the opening external diameter of the body other end for the other end of body forms the shutoff to the heat transfer pipe, and convenient operation, shutoff are effectual, and do not need too big operating space, can accomplish the stifled pipe operation of heat transfer pipe exit both sides in limited space from this on one side of the heat transfer pipe.
Drawings
FIG. 1 is a side view illustrating a plug for plugging a heat transfer tube of a heat exchanger according to an exemplary embodiment.
FIG. 2 is a left side view of a plug for plugging a heat transfer tube of a heat exchanger according to an exemplary embodiment.
FIG. 3 is a cross-sectional view illustrating a plug for plugging a tube of a heat transfer tube of a heat exchanger according to an exemplary embodiment.
FIG. 4 is a cross-sectional view illustrating a use of a plug for plugging a heat transfer tube of a heat exchanger according to an exemplary embodiment.
FIG. 5 is a cross-sectional view illustrating a use of a plug for plugging a heat transfer tube of a heat exchanger according to an exemplary embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a side view illustrating a plug for plugging a heat transfer tube of a heat exchanger according to an exemplary embodiment. FIG. 2 is a left side view of a plug for plugging a heat transfer tube of a heat exchanger according to an exemplary embodiment. FIG. 3 is a cross-sectional view illustrating a plug for plugging a tube of a heat transfer tube of a heat exchanger according to an exemplary embodiment. FIG. 4 is a cross-sectional view illustrating a use of a plug for plugging a heat transfer tube of a heat exchanger according to an exemplary embodiment. FIG. 5 is a cross-sectional view illustrating a use of a plug for plugging a heat transfer tube of a heat exchanger according to an exemplary embodiment. As shown in fig. 1 to 5, the plug for plugging a heat transfer pipe of a heat exchanger may include: the pin shaft 5, the cam 3, the body 1 and the screw 4;
as an example of the present embodiment, the cam 3 may be axially provided with an eccentric through hole, and the pin 5 may be penetratingly inserted into the eccentric through hole; one end of the pin shaft 5 extending out of the eccentric through hole can be fixedly connected with one end of the body 1;
the other end of the body 1 may be opened, for example, the inside of the body 1 may be a hollow ladder structure, and the body 1 may also be a cylindrical structure or a cup-shaped structure, and the structure of the body 1 is not limited in the embodiment of the present disclosure. The opening at the other end of the body 1 can be of a thin-wall taper hole structure, for example, the thickness of the side wall at the opening at the other end of the body 1 can be about 0.5mm (millimeter) -1mm, so that the opening at the other end of the body 1 can be favorably and smoothly subjected to plastic deformation when being pressed. The interior of the body 1 facing the opening may be provided with a threaded hole.
One end of the screw 4 can be inserted from the other end opening of the body 1 and can be screwed in the threaded hole, and the other end of the screw 4 has a tapered structure, and the inner diameter of the tapered structure can be gradually increased from the approach of the body 1 to the distance of the body 1.
The outer diameters of the body 1 and the cam 3 can be slightly smaller than the inner diameter of the heat transfer pipe 6, and a maintainer can coincide the center of the cam 3 with the center of the body 1 and send the plug for plugging the heat transfer pipe of the heat exchanger into the position required by the heat transfer pipe 6.
Under the condition of placing the end cap that is used for heat exchanger heat-transfer pipe stifled pipe in heat-transfer pipe 6, the maintainer can use spanner rotating screw 4, and screw 4 is under the circumstances of being lasted rotatory, and cam 3 can be under the dead weight effect and be relative eccentric rotation around round pin axle 5 and body 1, produces off-centre with body 1, and body 1 staggers each other gradually with cam 3 until cam 3 and body 1's outline card are on heat-transfer pipe 6 inner wall.
Under the condition that the outer contours of the cam 3 and the body 1 are clamped on the inner wall of the heat transfer pipe 6, friction occlusion is formed between the cam 3 and the body 1 and the heat transfer pipe 6, the whole plug is fixed on the inner wall of the heat transfer pipe 6 and cannot rotate continuously, so that the plug for blocking the heat transfer pipe of the heat exchanger is limited at the corresponding position in the heat transfer pipe 6, on the basis, a maintainer can rotate the screw 4 towards the direction of the body 1, the screw 4 can form thread transmission along the threaded hole of the body 1 because the body 1 and the cam 3 do not generate displacement any more, and the screw 4 can drive the conical structure at the other end of the screw 4 to move towards the opening at the other end of the body 1, further form radial extrusion on the side wall of the opening at the other end of the body 1, and force the;
with the continuous rotation of the screw 4, the outer wall of the opening at the other end of the body 1 can bite into the inner wall of the heat transfer pipe 6, so that the heat transfer pipe 6 is blocked.
In the embodiment of the disclosure, the body and the cam form an eccentric structure, so that when the screw is rotated, the cam can rotate eccentrically relative to the body around the pin shaft under the action of self weight, and the outer contours of the cam and the body are engaged on the inner wall of the heat transfer pipe to form a support; on this basis, the screw is by continuously under the rotatory condition of direction to the body, and the taper structure of the screw other end props big with the opening external diameter of the body other end for the other end of body forms the shutoff to the heat transfer pipe, and convenient operation, shutoff are effectual, and do not need too big operating space, can accomplish the stifled pipe operation of heat transfer pipe exit both sides in limited space from this on one side of the heat transfer pipe.
In a possible implementation, as shown in fig. 4 and 5, the screw 4 may be an inner hexagon screw, and the plug for plugging the heat transfer tube of the heat exchanger may further include: a hexagonal wrench 9; the service man can turn the screw 4 by means of a hex wrench 9, further reducing the required operating space.
In one possible implementation, as shown in fig. 5, the plug for plugging the heat transfer tubes of the heat exchanger may further include: a connecting rod 10 and a torque wrench adaptor block 11. One end of the connecting rod 10 can be connected with the hexagonal wrench 9, and the other end of the connecting rod 10 is connected with the torque wrench adapting block 11. Wherein, the connecting rod 10 with a suitable length can be selected according to the requirement of pipe blockage. In one example, the screw 4, the body 1 and the cam 3 which are connected with each other can be conveyed through the heat transfer pipe 6 through the near-end pipe plate 7 to the position of the heat transfer pipe 6 at the far-end pipe plate 8 by the connecting rod 10 and the hexagon wrench 9, and the pipe plugging is completed by rotating the torque wrench adapting block 11, so that the pipe plugging operation can be conveniently performed on the far end of the heat transfer pipe 6 through the connecting rod 10.
In a possible implementation, one end of the allen wrench 9 may be connected to the screw 4 by a wire clip or a magnet. Thus, the connection between the hexagonal wrench 9 and the screw 4 can be more stable, and the slippage between the hexagonal wrench 9 and the hexagonal screw 4 can be effectively avoided.
In a possible implementation manner, the plug for plugging the heat transfer pipe of the heat exchanger further comprises a conical cutting sleeve 2; the conical cutting sleeve 2 can be sleeved at the other end of the screw 4 to form a conical structure. In this way, the size of the conical structure at the other end of the screw 4 can be changed according to requirements, so that the heat transfer pipe with different sizes can be flexibly adapted.
In a possible implementation, as shown in fig. 2, the other end of the pin 5 extending out of the eccentric hole may have a baffle 12. The cam 3 may be disposed between the baffle and one end of the body 1, and the baffle 12 effectively prevents the cam 3 from being separated from the body 1.
In a possible realization, the outer side of the cam 3, as well as the outer side of the body 1 near the end of the cam 3, can be knurled. Wherein, the knurls arranged on the outer side surface of the cam 3 and the outer side surface of the body 1 close to one end of the cam 3 are circumferential or axial knurls. Therefore, the friction force between the cam 3 and the body 1 and the inner wall of the heat transfer pipe 6 can be increased, and the cam 3 and the body 1 are effectively prevented from slipping off the inner wall of the heat transfer pipe 6 after being clamped on the inner wall of the heat transfer pipe 6.
In a possible implementation manner, the outer side of the opening at the other end of the body 1 can be provided with knurling. Therefore, the friction force between the opening at the other end of the body 1 and the inner wall of the heat transfer pipe 6 can be increased, and the opening at the other end of the body 1 and the inner wall of the heat transfer pipe 6 are effectively prevented from slipping off.
The outer side surface of the opening at the other end of the body 1 is provided with a circumferential knurl, when the opening at the other end of the body 1 is occluded with the inner wall of the heat transfer pipe 6 by extrusion expansion, the circumferential knurl on the outer side surface of the opening at the other end of the body 1 is perpendicular to the relative displacement between the opening at the other end of the body 1 and the inner wall of the heat transfer pipe 6, so that the friction force between the opening at the other end of the body 1 and the inner wall of the heat transfer pipe 6 can be increased, and the opening at the other end of the.
Application example
The method comprises the following steps: the hexagonal wrench 9 and the screw 4 can be connected together by means of the elastic force of a steel wire clamp spring at the front end of the hexagonal wrench 9 or the suction force of a magnet, the extension bar 10 and the torque wrench adapting block 11 are sequentially connected at the rear end of the hexagonal wrench 9, the output torque of the torque wrench is adjusted to a required value, and the required value of the torque is mainly determined according to the material of the heat transfer pipe 6;
step two: the screw 4, the body 1 and the cam 3 which are connected with each other can be extended into the heat transfer pipe 6 of the heat exchanger at the position of the far-end pipe plate 8 through the extension bar 10, and the torque wrench adapting block 11, the extension bar 10 and the hexagonal wrench 9 are rotated by utilizing the torque wrench to further drive the body 1 to rotate;
step three: a pipe plugging person continuously rotates the torque wrench until the required output torque value is reached, the pipe plugging operation on the far end of the heat transfer pipe is completed, the extension bar 10 is withdrawn from the inside of the heat transfer pipe 6 of the heat exchanger, and the extension bar 10 is detached;
step four: the hexagonal wrench 9 is connected with the screw 4 by means of the elasticity of a steel wire clamp spring at the front end of the hexagonal wrench 9 or the attraction of a magnet, and the output torque of the torque wrench is adjusted to a required value according to the material of the heat transfer pipe 6 of the heat exchanger;
step five: the screw 4, the body 1 and the cam 3 which are connected with each other are extended into the position of the heat transfer pipe 6 of the heat exchanger, which is positioned at the near-end pipe plate 7, through a hexagonal wrench 9, and the body 1 is driven to rotate by utilizing the torque wrench to rotate the torque and the hexagonal wrench 9;
step six: and the pipe plugging personnel continuously rotate the torque wrench until the required output torque value is reached, and the pipe plugging operation on the near end of the heat transfer pipe is completed, namely the pipe plugging operation on the near end and the far end of the heat transfer pipe is realized.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (10)
1. The plug for plugging a heat transfer pipe of a heat exchanger is characterized by comprising: a pin, a cam, a body, and a screw;
the cam is provided with an eccentric through hole along the axial direction, and the pin shaft is inserted into the eccentric through hole in a penetrating manner;
one end of the pin shaft extending out of the eccentric through hole is fixedly connected with one end of the body;
the other end of the body is provided with an opening, and a threaded hole is formed in the position, facing the opening, in the body;
one end of the screw is in threaded connection with the threaded hole, and the other end of the screw is provided with a conical structure;
under the condition that the center of the cam is coincident with the center of the body, the plug for plugging the heat transfer pipe of the heat exchanger can enter the heat transfer pipe;
the plug for plugging the heat transfer pipe of the heat exchanger is positioned in the heat transfer pipe, and under the condition that the screw is continuously rotated, the cam can rotate eccentrically relative to the body around the pin shaft under the action of self weight until the cam and the outer contour of the body are clamped on the inner wall of the heat transfer pipe;
the cam and the outer contour of the body are clamped on the inner wall of the heat transfer pipe, and under the condition that the screw is continuously rotated towards the direction of the body, the conical structure at the other end of the screw expands the outer diameter of the opening at the other end of the body, so that the other end of the body forms a plug for the heat transfer pipe.
2. The plug for plugging a heat transfer pipe of a heat exchanger according to claim 1, wherein said screw is a socket head cap screw, and further comprising: a hexagonal wrench;
the hexagonal wrench is used for screwing the inner hexagonal screw.
3. The plug for plugging a heat transfer tube of a heat exchanger according to claim 2, further comprising: the connecting rod and the torque wrench adapting block;
one end of the connecting rod is connected with the hexagonal wrench, and the other end of the connecting rod is connected with the torque wrench adapting block.
4. The plug for plugging a heat transfer pipe of a heat exchanger according to claim 2, wherein one end of the hexagonal wrench is connected to the socket head cap screw by a wire clamp spring or a magnet.
5. The plug for plugging a heat transfer pipe of a heat exchanger according to claim 1, further comprising a tapered ferrule;
the conical clamping sleeve is sleeved at the other end of the screw to form a conical structure.
6. The plug for plugging the heat transfer pipe of the heat exchanger according to claim 1, wherein the pin extends out of the eccentric through hole and has a baffle at the other end.
7. The plug for plugging a heat transfer tube of a heat exchanger according to claim 1, wherein the outer side surface of said cam and the outer side surface of said body at the end adjacent to said cam are knurled.
8. The plug for plugging a heat transfer pipe of a heat exchanger according to claim 7, wherein the knurls formed on the outer side surface of the cam and the outer side surface of the body near one end of the cam are circumferential or axial knurls.
9. The plug for plugging the heat transfer tube of the heat exchanger according to claim 1, wherein the outer side surface of the opening at the other end of the body is knurled.
10. The plug for plugging a heat transfer pipe of a heat exchanger according to claim 9, wherein the outer side surface of the other end of the body is provided with a circumferential knurling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020946008.8U CN212962994U (en) | 2020-05-29 | 2020-05-29 | Plug for heat transfer pipe of heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020946008.8U CN212962994U (en) | 2020-05-29 | 2020-05-29 | Plug for heat transfer pipe of heat exchanger |
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| Publication Number | Publication Date |
|---|---|
| CN212962994U true CN212962994U (en) | 2021-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020946008.8U Active CN212962994U (en) | 2020-05-29 | 2020-05-29 | Plug for heat transfer pipe of heat exchanger |
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| Country | Link |
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| CN (1) | CN212962994U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114596974A (en) * | 2021-12-28 | 2022-06-07 | 中核武汉核电运行技术股份有限公司 | Split type end cap transmission device |
-
2020
- 2020-05-29 CN CN202020946008.8U patent/CN212962994U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114596974A (en) * | 2021-12-28 | 2022-06-07 | 中核武汉核电运行技术股份有限公司 | Split type end cap transmission device |
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