Connecting structure for superconducting cable framework

Abstract

The invention provides a connecting structure for a superconducting cable framework. The connecting structure comprises a connecting clamping piece and a connecting sleeve. The connecting clamping piece is in a hollow pipe shape and is provided with an elastic component, a limiting baffle and a blocking rod. One end of the elastic part is fixed on one inner wall of the connecting clamping piece, and the other end of the elastic part abuts against the other inner wall of the connecting clamping piece; the limiting baffle plate is arranged outside the connecting clamping piece and is fixed with a superconducting cable framework; the blocking rod is located outside the connecting clamping piece and extends into the connecting clamping piece to be fixed to the elastic component. One end of the connecting sleeve is fixed with the other superconducting cable skeleton, and the inner wall of the other end of the connecting sleeve is provided with a thickening layer; the inner diameter of the thickening layer is larger than the outer diameter of the connecting clamping piece and smaller than the outer diameter of the limiting baffle. The axial length of the thickening layer is smaller than or equal to the distance between the limiting baffle and the blocking rod. During assembly, the blocking rod is extruded into the connecting clamping piece, and after assembly, the blocking rod is exposed out of the connecting clamping piece and clamps the thickening layer. According to the invention, on-site rapid connection of the superconducting cable skeleton can be realized, so that the problems caused by traditional welding are solved.

Description

Technical Field

[0001] The invention relates to the technical field of power cables, and in particular to a connection structure used on a superconducting cable skeleton. Background Art

[0002] Since the length of superconducting cables is limited by manufacturing and transportation, and in actual applications, multiple sections of superconducting cables need to be connected to form a longer line, so an intermediate joint is needed. The function of the intermediate joint is to connect two sections of superconducting cables so that the entire system can continuously transmit electrical energy. It is an indispensable technical means and core component for the development of long-distance superconducting cable systems and online maintenance of superconducting cables.

[0003] The intermediate joint refers to the part that connects two sections of superconducting cables, usually including insulation materials, cooling systems, connectors, etc. However, before completing the intermediate joint to connect the two sections of superconducting cables, the two sections of superconducting cable skeletons need to be directly welded on site, which is not only difficult to operate and the welding quality cannot be guaranteed, but also the welding slag is very easy to mix into the low-temperature circulation system. Therefore, the on-site rapid connection of superconducting cable skeletons is an urgent problem to be solved. Summary of the invention

[0004] The technical problem to be solved by the embodiments of the present invention is to provide a connection structure for a superconducting cable skeleton, which can realize on-site rapid connection of the superconducting cable skeleton, thereby overcoming the problems caused by traditional welding.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides a connection structure for a superconducting cable skeleton, comprising a connection clamp and a connection sleeve that cooperate with each other; wherein:

[0006] The connecting clamp is in the shape of a hollow tube, on which an elastic component, a limiting baffle and a stopper are arranged; wherein the elastic component is arranged in the middle of the connecting clamp, and comprises a first end fixed to an inner side wall of the connecting clamp and a second end pressed against the other inner side wall of the connecting clamp along the radial direction of the connecting clamp; the limiting baffle is arranged on the outside of the connecting clamp, and it surrounds the circumference of the outer edge of one end port of the connecting clamp, and is fixed to a superconducting cable skeleton on a side surface away from the elastic component; one end of the stopper is located on the outside of the connecting clamp, and the other end extends into the interior of the connecting clamp to be fixed to the elastic component and is arranged close to the second end of the elastic component;

[0007] The connecting sleeve is in the shape of a hollow tube, one end face of which is fixed to another superconducting cable skeleton, and the inner wall of the other end is circumferentially fixed with an annular thickening layer; wherein the inner diameter of the thickening layer is larger than the outer diameter of the connecting clamp and smaller than the outer diameter of the limit baffle, and the axial length thereof is smaller than or equal to the reserved spacing between the limit baffle and the gear lever;

[0008] Among them, when the connecting clamp and the connecting sleeve are assembled, the shift rod is squeezed into the interior of the connecting clamp; after the connecting clamp and the connecting sleeve are assembled, the shift rod is exposed outside the connecting clamp and is located on the side of the thickened layer away from the limit baffle, and its exposed length is greater than the gap reserved between the thickened layer and the connecting clamp.

[0009] Wherein, it also includes: a sealing member; wherein, the sealing member is arranged between the connecting clamp and the connecting sleeve, and is annular and installed on a side surface of the thickened layer facing the connecting clamp.

[0010] Wherein, the sealing element is made of rubber.

[0011] Wherein, the elastic component is an arc-shaped elastic steel sheet.

[0012] Wherein, the length of the shift rod is smaller than the inner radius of the connecting clamp.

[0013] Wherein, the shift rod is made of stainless steel and is fixed on the elastic steel sheet by welding.

[0014] Wherein, the limit baffle and the connecting clamp are integrally formed.

[0015] Wherein, the connecting sleeve and the thickened layer are integrally formed.

[0016] Wherein, the connecting clamp and the connecting sleeve are both made of stainless steel, and both are fixed together with the corresponding superconducting cable skeleton by welding.

[0017] Implementing the embodiments of the present invention has the following beneficial effects:

[0018] The present invention realizes on-site rapid connection of two superconducting cable skeletons by quickly assembling a connecting clamp and a connecting sleeve, and utilizing a stop rod exposed outside the connecting clamp and clamped on a side of the thickened layer away from the limit baffle, thereby overcoming the problems caused by traditional welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0020] Figure 1A schematic diagram of a structure before assembly of a connection structure used on a superconducting cable skeleton provided in an embodiment of the present invention;

[0021] Figure 2 The present invention is a schematic structural diagram of a connection structure for a superconducting cable skeleton after assembly provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0022] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0023] like Figure 1 and Figure 2 As shown in the figure, a connection structure for a superconducting cable skeleton is proposed in an embodiment of the present invention, comprising a connection clamp 1 and a connection sleeve 2 which cooperate with each other; wherein,

[0024] The connecting clamp 1 is made of stainless steel and is in the shape of a hollow tube, on which an elastic component 11, a limit baffle 12 and a stop rod 13 are arranged; wherein the elastic component 11 (such as a spring, an elastic steel sheet, etc.) is arranged in the middle of the connecting clamp 1, including a first end fixed to an inner side wall of the connecting clamp 1 (such as by welding) and a second end pressed against the other inner side wall of the connecting clamp 1 along the radial direction of the connecting clamp 1; the limit baffle 12 is made of stainless steel and is integrally formed with the connecting clamp 1, which is arranged on the outside of the connecting clamp 1, and its limit baffle 12 is arranged on the outside of the connecting clamp 1, and its limit baffle 12 is arranged on the outside of the connecting clamp 1, and its limit baffle 12 is arranged on the outside of the connecting clamp 1, and its limit baffle 12 is arranged on the outside of the connecting clamp 1, and its limit baffle 12 is arranged on the inside ... The outer edge of one end of the connecting card 1 is circumferentially surrounded (i.e., forming a ring) and fixed to a superconducting cable skeleton L1 (in the shape of a corrugated tube) on the side away from the elastic component 11; the stopper rod 13 is made of stainless steel, one end of which is located outside the connecting card 1, and the other end extends into the interior of the connecting card 1 through a preset through hole (not shown) on the connecting card 1 and is fixed to the elastic component 11 (such as by welding) and is arranged close to the second end of the elastic component 11; at this time, the length of the stopper rod 13 is preferably less than the inner radius of the connecting card 1;

[0025] The connecting sleeve 2 is made of stainless steel and is in the shape of a hollow tube. One end face thereof is fixed to another superconducting cable skeleton L2 (in the shape of a corrugated tube) (e.g., by welding), and an annular thickening layer 21 is fixed around the inner wall of the other end in a circumferential direction; wherein the thickening layer 21 is integrally formed with the connecting sleeve 2, and its inner diameter is larger than the outer diameter of the connecting clamp 1 and smaller than the outer diameter of the limit baffle 12, and its axial length is less than or equal to the reserved spacing between the limit baffle 12 and the stop rod 13, so that the thickening layer 21 can be sleeved on the outside of the connecting clamp 1 while being limited by the limit baffle 12 and the stop rod 13 and will not slip off;

[0026] During the assembly of the connecting clamp 1 and the connecting sleeve 2, the shift rod 13 is squeezed into the interior of the connecting clamp 1; after the connecting clamp 1 and the connecting sleeve 2 are assembled, the shift rod 13 is exposed outside the connecting clamp 1 and is located on the side of the thickened layer 21 away from the limit baffle 12, and its exposed length is greater than the gap reserved between the thickened layer 21 and the connecting clamp 1.

[0027] In an embodiment of the present invention, in order to ensure the reliability of assembly between the connecting card 1 and the connecting sleeve 2, the connecting structure also includes: a sealing member 3 made of rubber; wherein the sealing member 3 is arranged between the connecting card 1 and the connecting sleeve 2, and is annular and installed on the side surface of the thickened layer 21 facing the connecting card 1, thereby reducing the gap between the thickened layer 21 or the connecting sleeve 2 and the limit baffle 12, so that the thickened layer 21 is firmly stuck between the limit baffle 12 and the gear rod 13.

[0028] The working principle of a connection structure for a superconducting cable skeleton in an embodiment of the present invention is as follows: when connecting, the lever 13 is pressed to deform the elastic component 11, so that the lever 13 is retracted into the interior of the connection card 1, and the driving force is continued to insert the connection card 1 into the connection sleeve 2. When the connection sleeve 2 reaches the limit baffle 12 of the connection card 1, the elastic component 11 recovers its deformation and drives the lever 13 to extend out of the connection card 1 and get stuck on the side of the thickening layer 21 away from the limit baffle 12, thereby realizing the on-site rapid connection of two superconducting cable skeletons. At this time, after the connection card 1 and the connection sleeve 2 are spliced, the sealing member 3 is squeezed to deform it so as to block the gap between the two.

[0029] On the contrary, when disassembling, the lever 13 is pressed to deform the elastic component 11, so that the lever 13 is retracted into the interior of the connecting clamp 1, and the connecting clamp 1 is driven to leave the connecting sleeve 2, so that the thickened layer 21 of the connecting sleeve 2 leaves the connecting clamp 1. At this time, the elastic component 11 recovers its deformation and drives the lever 13 to extend out of the connecting clamp 1, and returns to the initial state.

[0030] Implementing the embodiments of the present invention has the following beneficial effects:

[0031] The present invention realizes on-site rapid connection of two superconducting cable skeletons by quickly assembling a connecting clamp and a connecting sleeve, and utilizing a stop rod exposed outside the connecting clamp and clamped on a side of the thickened layer away from the limit baffle, thereby overcoming the problems caused by traditional welding.

[0032] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A connection structure for a superconducting cable skeleton, characterized in that: It includes a connecting card and a connecting sleeve that cooperate with each other; wherein, The connecting clamp is in the shape of a hollow tube, on which an elastic component, a limiting baffle and a stopper are arranged; wherein the elastic component is arranged in the middle of the connecting clamp, and comprises a first end fixed to an inner side wall of the connecting clamp and a second end pressed against the other inner side wall of the connecting clamp along the radial direction of the connecting clamp; the limiting baffle is arranged on the outside of the connecting clamp, and it surrounds the circumference of the outer edge of one end port of the connecting clamp, and is fixed to a superconducting cable skeleton on a side surface away from the elastic component; one end of the stopper is located on the outside of the connecting clamp, and the other end extends into the interior of the connecting clamp to be fixed to the elastic component and is arranged close to the second end of the elastic component; The connecting sleeve is in the shape of a hollow tube, one end face of which is fixed to another superconducting cable skeleton, and the inner wall of the other end is circumferentially fixed with an annular thickening layer; wherein the inner diameter of the thickening layer is larger than the outer diameter of the connecting clamp and smaller than the outer diameter of the limit baffle, and the axial length thereof is smaller than or equal to the reserved spacing between the limit baffle and the gear lever; Among them, when the connecting clamp and the connecting sleeve are assembled, the shift rod is squeezed into the interior of the connecting clamp; after the connecting clamp and the connecting sleeve are assembled, the shift rod is exposed outside the connecting clamp and is located on the side of the thickened layer away from the limit baffle, and its exposed length is greater than the gap reserved between the thickened layer and the connecting clamp.

2. The connection structure for a superconducting cable skeleton according to claim 1, characterized in that: Also includes: A sealing member; wherein the sealing member is arranged between the connecting clamp and the connecting sleeve, and is annular and installed on a side surface of the thickened layer facing the connecting clamp.

3. The connection structure for a superconducting cable skeleton according to claim 2, characterized in that: The sealing element is made of rubber.

4. The connection structure for a superconducting cable skeleton according to claim 3, characterized in that: The elastic component is an arc-shaped elastic steel sheet.

5. The connection structure for a superconducting cable skeleton according to claim 4, characterized in that: The length of the shift rod is smaller than the inner radius of the connecting clamp.

6. The connection structure for a superconducting cable skeleton according to claim 5, characterized in that: The shift lever is made of stainless steel and is fixed on the elastic steel sheet by welding.

7. The connection structure for a superconducting cable skeleton according to claim 6, characterized in that: The limit baffle and the connecting clamp are integrally formed.

8. The connection structure for a superconducting cable skeleton according to claim 7, characterized in that: The connecting sleeve and the thickened layer are integrally formed.

9. The connection structure for a superconducting cable skeleton according to claim 8, characterized in that: The connecting clamp and the connecting sleeve are both made of stainless steel, and both are fixed together with the corresponding superconducting cable skeleton by welding.

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