CN107681624B - End piece device of superconducting cable corrugated pipe and using method thereof - Google Patents
End piece device of superconducting cable corrugated pipe and using method thereof Download PDFInfo
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- CN107681624B CN107681624B CN201711045545.4A CN201711045545A CN107681624B CN 107681624 B CN107681624 B CN 107681624B CN 201711045545 A CN201711045545 A CN 201711045545A CN 107681624 B CN107681624 B CN 107681624B
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- corrugated pipe
- end piece
- sealing sleeve
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- superconducting cable
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/34—Cable fittings for cryogenic cables
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Abstract
An end piece arrangement of superconducting cable corrugated pipe and method of use thereof, comprising: the sealing sleeve is sleeved on the outer wall of the corrugated pipe of the superconducting cable, and the inner wall of the sealing sleeve is provided with corrugations matched with the corrugations of the outer wall of the corrugated pipe in shape, so that the sealing sleeve is fixed on the outer wall of the corrugated pipe; the corrugated pipe end piece is a hollow pipe body, is sleeved on one side of the sealing sleeve, which is close to the end part of the corrugated pipe, and is connected with the sealing sleeve; and the locking mechanism enables the sealing sleeve and the corrugated pipe end piece to be tightly attached together. The sealing sleeve is tightly hooped on the surface of the corrugated pipe after being stressed and cannot move. And the sealing sleeve is in sealing connection with the corrugated pipe end piece through the locking mechanism. A welded, sealed connection can be avoided. The sealing sleeve is matched with the stainless steel end piece through a conical surface, the conical surface is tightly attached through the tensioning bolt, the end piece is tightly connected with the corrugated pipe, the locking spring is matched to assist in self-locking adjustment of the connection degree, and sealing between the sealing sleeve and the corrugated pipe is guaranteed.
Description
Technical Field
The invention relates to the technical field of superconducting cables, in particular to an end piece device of a superconducting cable corrugated pipe and a using method thereof.
Background
The superconducting cable is structurally shaped as a small-diameter pipe with a large-diameter pipe sleeve, the superconducting cable body is arranged inside the small-diameter pipe, a PE protective layer is coated outside the large-diameter pipe, and an interlayer between the two pipes is filled with heat insulation materials and vacuumized to prevent heat exchange loss. The connection method of the corrugated pipe of the superconducting cable and the terminal thermostat is generally to cut off the corrugated pipe, and then another welding part for connecting with the terminal thermostat is additionally welded at the cut off part, which is influenced by various factors such as the laying site and the welding position of the superconducting cable, and the welding operation has the following problems:
(1) because the corrugated pipe is generally made of aluminum, the welding part of the welding part and the corrugated pipe is made of aluminum materials, the connecting end of the welding part and the terminal container is made of stainless steel materials, and the two parts of materials are processed into a whole through a special process, so that the forming process of the welding part is complicated;
(2) in addition, the welding process of the welding part and the superconducting cable is complicated, the heat-insulating material between the corrugated pipes needs to be cut off before welding, and the heat-insulating material is connected again after welding is finished, so that the heat-insulating material has a break point;
(3) welding personnel are required to have higher welding skills during welding, and the corrugated pipe can be welded through due to slight carelessness, so that higher difficulty is brought to welding operation.
Disclosure of Invention
In order to ensure the connection of the superconducting cable and the terminal container, the corrugated pipe end piece and the corrugated pipe are welded. The invention discloses an end piece device of a superconducting cable corrugated pipe, wherein a sealing sleeve of the end piece device is tightly hooped on the surface of the corrugated pipe after being stressed and cannot move. And the sealing sleeve is in sealing connection with the corrugated pipe end piece through the locking mechanism. Therefore, the sealing connection mode of welding the end piece of the corrugated pipe and the corrugated pipe in the prior art can be avoided, and the heat insulating materials between the corrugated pipes need to be cut off and then connected due to the welding process. The sealing sleeve with the conical surface is matched with the stainless steel end piece through the conical surface, the conical surface is tightly attached through the tensioning bolt, the end piece is tightly connected with the corrugated pipe, and the locking spring is matched to assist self-locking adjustment of the connection degree. In a low-temperature environment, the contraction between the sealing sleeve and the corrugated pipe may be inconsistent, but the existence of the locking spring can release the elastic force to ensure the sealing between the sealing sleeve and the corrugated pipe.
An end piece arrangement of a superconducting cable bellows comprising: the sealing sleeve is sleeved on the outer wall of the corrugated pipe of the superconducting cable, and the inner wall of the sealing sleeve is provided with corrugations matched with the corrugations of the outer wall of the corrugated pipe in shape, so that the sealing sleeve is fixed on the outer wall of the corrugated pipe; the corrugated pipe end piece is a hollow pipe body, is sleeved on one side of the sealing sleeve, which is close to the end part of the corrugated pipe, and is connected with the sealing sleeve; and the locking mechanism enables the sealing sleeve and the corrugated pipe end piece to be tightly attached together.
Preferably, the locking mechanism comprises: the pressing retainer ring is sleeved on the other side of the seal sleeve; the locking bolts extend out of the outer wall of the corrugated pipe end piece along the radial outer side, and a plurality of locking bolts extend out of the boss along the axial direction of the corrugated pipe; and each locking bolt penetrates through the compression check ring and is fastened through the locking nut, so that the corrugated pipe end piece and the sealing sleeve are tightly attached together.
Preferably, the locking mechanism comprises a locking sleeve which is a hollow pipe body with an inner shoulder and is sleeved on the corrugated pipe end piece, wherein threads are arranged on the outer circumference of the corrugated pipe end piece, the surface of the locking sleeve, which is contacted with the outer circumference of the corrugated pipe end piece, is provided with internal threads matched with the inner thread, the locking sleeve is connected with the corrugated pipe end piece through screwing of the threads, and the inner shoulder of the locking sleeve abuts against the end face of the sealing sleeve, which is far away from the end part of the corrugated pipe.
Preferably, a second locking spring is arranged between the inner shoulder of the locking sleeve and the end face of the sealing sleeve on the side remote from the end of the bellows.
Preferably, the outer circumference of the sealing sleeve is conical, the outer diameter of the sealing sleeve is gradually increased towards the direction far away from the corrugated pipe end piece, the inner diameter of the corrugated pipe end piece is correspondingly conical, the inner diameter of the sealing sleeve is gradually increased towards the direction close to the sealing sleeve, the conical degree of the sealing sleeve is consistent with that of the corrugated pipe end piece, and the two conical surfaces are tightly attached through locking of the locking mechanism.
Preferably, the locking mechanism further comprises a first locking spring sleeved on the locking bolt and located between the locking nut and the pressing retaining ring, and the locking nut is extruded on the pressing retaining ring through the first locking spring.
Preferably, the sealing sleeve is made of soft material.
Preferably, a sealing ring is also arranged on the mutually matched conical surfaces of the sealing sleeve and the bellows end piece.
A method of using the end piece device for a superconducting cable corrugated pipe, which performs the following operations using the end piece device for a superconducting cable corrugated pipe described above: the pressing check ring, the sealing sleeve and the corrugated pipe end piece are sequentially sleeved on the outer side of the corrugated pipe of the superconducting cable, so that the plurality of locking bolts penetrate through the pressing check ring and are fastened by the locking nuts, and the corrugated pipe end piece is tightly attached to the sealing sleeve.
Preferably, between the step of sleeving the compression collar and the sealing sleeve on the outer side of the corrugated pipe of the superconducting cable and the step of sleeving the corrugated pipe end piece on the outer side of the corrugated pipe of the superconducting cable, a sealing paste is applied to the surfaces, which are jointed with each other, of the sealing sleeve and the corrugated pipe end piece.
Drawings
The above features and technical advantages of the present invention will become more apparent and readily appreciated from the following description of the embodiments thereof taken in conjunction with the accompanying drawings.
FIG. 1 is a cross-sectional view showing a first embodiment of the present invention;
fig. 2 is a cross-sectional view showing a second embodiment of the present invention.
Detailed Description
Embodiments of an end piece device of a superconducting cable corrugated tube and a method of using the same according to the present invention will be described below with reference to the accompanying drawings. Those of ordinary skill in the art will recognize that the described embodiments can be modified in various different ways, or combinations thereof, without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims. Furthermore, in the present description, the drawings are not to scale and like reference numerals refer to like parts.
The end piece device of the superconducting cable corrugated pipe comprises a sealing sleeve, a corrugated pipe end piece and a locking mechanism, wherein the sealing sleeve is sleeved on the outer wall of the corrugated pipe of the superconducting cable, and the inner wall of the sealing sleeve is provided with corrugations matched with the corrugations of the outer wall of the corrugated pipe in shape, so that the sealing sleeve is fixed on the outer wall of the corrugated pipe. The corrugated pipe end piece is a hollow pipe body and is sleeved on the corrugated pipe of the sealing sleeve, wherein the corrugated pipe is close to one side of the end part of the corrugated pipe, and the corrugated pipe end piece is connected with the sealing sleeve. The locking mechanism enables the sealing sleeve and the corrugated pipe end piece to be tightly attached together.
Two embodiments are described below, depending on the locking mechanism.
First embodiment
The embodiment provides an end piece device of a superconducting cable corrugated pipe, which comprises a sealing sleeve, a corrugated pipe end piece, a compression check ring and a locking bolt. The sealing sleeve is sleeved on the outer wall of the corrugated pipe of the superconducting cable, and the inner wall of the sealing sleeve is provided with corrugations matched with the corrugated structure of the outer wall of the corrugated pipe, so that the sealing sleeve is fixed on the outer wall of the corrugated pipe. The bellows end piece is a hollow tube body, and an annular boss extends out of the outer wall of the bellows end piece along the radial outer side. One or more locking bolts extend out of the annular boss along the axial direction of the corrugated pipe. And a compression check ring is further sleeved on the pipe body of the corrugated pipe on the side, far away from the corrugated pipe end piece, of the sealing sleeve, and each locking bolt penetrates through the compression check ring and is fastened through a locking nut, so that the corrugated pipe end piece and the sealing sleeve are tightly attached together in a sealing fit manner.
Fig. 1 is an end piece device of a superconducting cable corrugated tube according to the present embodiment, and the structure thereof will be described in detail with reference to fig. 1. The corrugated pipe and end piece connecting device mainly comprises a sealing sleeve 1, a corrugated pipe end piece 2, a compression retainer ring 3, a locking bolt 4 and a locking nut 7. The sealing sleeve 1 is sleeved on the corrugated outer wall of the corrugated pipe 5, and the inner wall of the sealing sleeve 1 is provided with corrugations matched with the corrugated outer wall of the corrugated pipe 5, so that the sealing sleeve 1 can be stably fixed on the outer wall of the corrugated pipe 5. The corrugated pipe end piece 2 is sleeved on the outer circumference of the corrugated pipe 5, and one end of the corrugated pipe end piece 2, which is in contact with the sealing sleeve 1, is jointed by adopting a sealing structure. On the outer wall of bellows end piece 2, radially outside extends an annular projection 21. A plurality of locking bolts 4 extend from the annular boss 21 axially towards one side of the gland 1. The annular boss 21 may be in any shape other than the annular shape as long as it can support the lock bolt 4. A compression retainer ring 3 is sleeved on the corrugated pipe 5 on one side of the sealing sleeve 1 far away from the corrugated pipe end piece 2. The locking bolt 4 penetrates the pressing retainer ring 3 and is screwed and locked by the locking nut 7. Because the sealing sleeve 1 can be fastened on the outer wall of the corrugated pipe 5, the corrugated pipe end piece 2 can be pulled towards the sealing sleeve through the locking bolt 4, and the sealing sleeve 1 and the corrugated pipe end piece 2 are attached more tightly. Wherein, can also be on annular boss 21 processing through-hole, pass the locking bolt in the through-hole.
The seal between gland 1 and bellows end piece 2 may take a variety of forms and in an alternative embodiment, a tapered seal mechanism may be used. The outer circumference of the sealing sleeve 1 is conical and its outer diameter increases gradually away from the bellows end piece 2. The inner circumference of bellows end piece 2 is correspondingly conical and its inner diameter increases towards sealing sleeve 1. The taper of the sealing sleeve 1 is consistent with that of the corrugated pipe end piece 2, so that the corrugated pipe end piece 2 is sleeved on the outer side of the sealing sleeve 1 and locked through the locking bolt, and the two conical surfaces are tightly attached. The bellows end piece 2 transmits pressure to the gland 1 via a conical surface, tightly fitting it to the outer surface of the bellows 5. Of course, other sealing arrangements, such as shoulder to shoulder, are possible, however, a conical sealing arrangement is preferred.
In an alternative embodiment, the outer circumference of the sealing sleeve 1 is conical and its inner diameter is gradually increasing towards the bellows end piece 2. The outer circumference of bellows end piece 2 is correspondingly conical and its outer diameter increases in the direction away from sealing sleeve 1. The taper of the sealing sleeve 1 is consistent with that of the corrugated pipe end piece 2, so that the corrugated pipe end piece 2 is sleeved on the inner side of the sealing sleeve 1 and locked through the locking bolt, and the two conical surfaces are tightly attached.
When the sealing sleeve 1 and the corrugated pipe 5 are in a low-temperature environment, the sealing sleeve 1 and the corrugated pipe 5 may shrink, and the shrinkage rates of the sealing sleeve 1 and the corrugated pipe 5 are different, so that a gap is formed between the sealing sleeve 1 and the corrugated pipe 5, and the sealing effect is weakened. In an alternative embodiment, a first locking spring 6 is further arranged between the locking nut 7 and the compression retainer ring 3, the first locking spring 6 is sleeved on the locking bolt 4, and when the contraction is inconsistent, the first locking spring 6 releases the elastic force to tightly clamp the sealing sleeve 1 on the outer surface of the corrugated pipe 5, so that the sealing effect is ensured. In addition, the first locking spring 6 can be used for releasing and releasing the elastic force according to different temperature environments, so that the sealing between the sealing sleeve 1 and the corrugated pipe 5 is ensured.
In an alternative embodiment, the sealing sleeve is a soft material, such as rubber.
In an alternative embodiment, a sealing ring is also provided on the mating conical surfaces of the gland and bellows end piece 2.
In an alternative embodiment, bellows end piece 2 is made of a stainless steel material.
Second embodiment
The end piece device of the superconducting cable corrugated pipe mainly comprises a sealing sleeve 1, a corrugated pipe end piece 2 and a locking sleeve 8. The sealing sleeve 1 is sleeved on the corrugated outer wall of the corrugated pipe 5, and the inner wall of the sealing sleeve 1 is provided with corrugations matched with the corrugated outer wall of the corrugated pipe 5, so that the sealing sleeve 1 can be stably fixed on the outer wall of the corrugated pipe 5. The bellows end piece 2 is sleeved on the outer circumference of the bellows 5, and one end of the bellows end piece 2, which is contacted with the sealing sleeve 1, is connected. On the outer circumference of the bellows end piece 2, a thread is provided, and the locking sleeve 8 has an internal thread cooperating therewith. The locking sleeve 8 also has an inner shoulder 81 that engages with the end face of the sealing sleeve 1. The inner shoulder 81 of the locking sleeve 8 rests against the end face of the sealing sleeve 1 on the side remote from the end of the bellows and is screwed to the bellows end piece 2. Since sealing sleeve 1 can be fastened to the outer wall of bellows 5, bellows end piece 2 can be pulled in the direction of the sealing sleeve by means of locking sleeve 8, which also makes the joint between sealing sleeve 1 and bellows end piece 2 tighter.
In an alternative embodiment, a second locking spring (not shown) is also provided between the inner shoulder 81 of the locking sleeve 8 and the end face of the sealing sleeve 1 on the side remote from the end of the bellows. The second locking spring may be a spring which is fitted over the bellows 5 and is compressed between the inner shoulder 81 and the end face of the sealing sleeve 1 on the side remote from the end of the bellows. It is also possible to provide an annular groove (not shown) in the end face of the sealing sleeve 1 on the side remote from the end of the bellows, in which groove the second locking spring is placed.
The method of using the end piece device of the superconducting cable corrugated tube of the first embodiment is as follows:
the compression check ring, the sealing sleeve and the corrugated pipe end piece are sequentially sleeved on the outer side of the corrugated pipe of the superconducting cable, so that the plurality of locking bolts penetrate through the compression check ring and are fastened by the locking nuts, the corrugated pipe end piece and the sealing sleeve are tightly connected through the sealing structure, and the sealing sleeve and the corrugated pipe end piece are tightly connected.
In an alternative embodiment, between the step of sleeving the compression collar and the sealing sleeve on the outer side of the corrugated pipe of the superconducting cable and the step of sleeving the corrugated pipe end piece on the outer side of the corrugated pipe of the superconducting cable, a sealing paste is coated on the surface where the sealing sleeve and the corrugated pipe are jointed with each other.
In an alternative embodiment, the end face of the bellows is no less than 10cm from the end face of the gland.
The end piece device of the superconducting cable corrugated pipe replaces the connecting effect of the corrugated pipe end piece and the terminal container which can be finished in the prior welding mode, and a series of complicated processes caused by the welding process are avoided. When the locking bolt is fastened, the corrugated pipe end piece is driven to move, and the moving force is transmitted to the sealing sleeve through the inner conical surface of the corrugated pipe end piece. The sealing sleeve is made of soft material and is tightly hooped on the surface of the corrugated pipe after being stressed and contracted to realize the sealing connection of the corrugated pipe and the end piece, so that the sealing connection mode of welding the corrugated pipe end piece and the corrugated pipe in the prior art can be avoided, and the heat insulating materials among the corrugated pipes need to be cut off and then connected due to the welding process. When the corrugated pipe is in a low-temperature environment, the sealing between the sealing sleeve and the corrugated pipe can be damaged due to inconsistent contraction, but the problem is solved skillfully by adding the locking spring, if the sealing sleeve contracts, the locking spring can automatically release elasticity to continuously compress the sealing sleeve through the retainer ring, and finally, the sealing connection between the sealing sleeve and the corrugated pipe is realized.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An end piece assembly for a superconducting cable corrugated tube, comprising:
the sealing sleeve is sleeved on the outer wall of the corrugated pipe of the superconducting cable, and the inner wall of the sealing sleeve is provided with corrugations matched with the corrugations of the outer wall of the corrugated pipe in shape, so that the sealing sleeve is fixed on the outer wall of the corrugated pipe;
the corrugated pipe end piece is a hollow pipe body, is sleeved on one side of the sealing sleeve, which is close to the end part of the corrugated pipe, and is connected with the sealing sleeve;
locking mechanism, locking mechanism makes seal cover and bellows end piece closely laminate together, wherein, locking mechanism includes:
the pressing retainer ring is sleeved on the other side of the seal sleeve;
the locking bolts extend out of the outer wall of the corrugated pipe end piece along the radial outer side, and a plurality of locking bolts extend out of the boss along the axial direction of the corrugated pipe;
each locking bolt penetrates through the compression check ring and is fastened through the locking nut, so that the corrugated pipe end piece and the sealing sleeve are tightly attached together;
the locking mechanism further comprises a first locking spring which is sleeved on the locking bolt and is positioned between the locking nut and the pressing retaining ring, and the locking nut is extruded on the pressing retaining ring through the first locking spring.
2. The end piece device of a superconducting cable bellows according to claim 1, wherein the sealing sleeve has a tapered outer circumference, and an outer diameter thereof gradually increases in a direction away from the bellows end piece, and an inner diameter thereof also correspondingly increases in a direction close to the sealing sleeve, and the taper of the sealing sleeve is identical to the taper of the bellows end piece, and the two tapered surfaces are tightly attached by locking by the locking mechanism.
3. An end piece arrangement of a superconducting cable bellows according to claim 1,
the sealing sleeve is made of soft materials.
4. An end piece arrangement of a superconducting cable bellows according to claim 2,
and a sealing ring is also arranged on the conical surface of the sealing sleeve and the corrugated pipe end piece which are matched with each other.
5. A method of using an end piece device for a superconducting cable corrugated pipe, comprising the steps of:
the pressing check ring, the sealing sleeve and the corrugated pipe end piece are sequentially sleeved on the outer side of the corrugated pipe of the superconducting cable, so that the plurality of locking bolts penetrate through the pressing check ring and are fastened by the locking nuts, and the corrugated pipe end piece is tightly attached to the sealing sleeve.
6. A method of using an end piece arrangement of superconducting cable bellows as claimed in claim 5,
between the step of sleeving the compression check ring and the sealing sleeve on the outer side of the corrugated pipe of the superconducting cable and the step of sleeving the corrugated pipe end piece on the outer side of the corrugated pipe of the superconducting cable, the method further comprises the step of smearing sealing paste on the surfaces, which are mutually jointed, of the sealing sleeve and the corrugated pipe end piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711045545.4A CN107681624B (en) | 2017-10-31 | 2017-10-31 | End piece device of superconducting cable corrugated pipe and using method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711045545.4A CN107681624B (en) | 2017-10-31 | 2017-10-31 | End piece device of superconducting cable corrugated pipe and using method thereof |
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| CN107681624A CN107681624A (en) | 2018-02-09 |
| CN107681624B true CN107681624B (en) | 2020-05-08 |
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| CN112787284A (en) * | 2019-11-11 | 2021-05-11 | 苏师大半导体材料与设备研究院(邳州)有限公司 | Nested formula cable positioning seal assembly |
| CN113013010B (en) * | 2019-12-20 | 2023-09-29 | 中微半导体设备(上海)股份有限公司 | Corrugated pipe structure, method for adjusting verticality and plasma processing device thereof |
| CN111293665A (en) * | 2020-03-25 | 2020-06-16 | 上海犇臣科贸有限公司 | Self-locking device for cable sealing |
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