Cable bus thermal shrinkage intermediate joint
By using welding connection and heat shrinkage process to make intermediate joints in the cable busbar, the problem of difficult to control on-site production quality is solved, and safe, reliable and low-cost cable busbar connection is achieved.
Patent Information
- Application Number
- CN202421837647.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-31
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-07-31
AI Technical Summary
In existing power transmission lines, the quality of the intermediate joints of tubular busbars is difficult to control during on-site production, which affects safe operation and is costly.
Two conductors are connected by welding to form a molten body, and a shielding layer and an insulating layer are set on the outside. The middle joint is made using a heat shrink process to avoid excessive contact resistance caused by mechanical connection and ensure connection reliability and stability.
It improves the stability and safety of the busbar system, reduces the cost of intermediate joints, and can be prefabricated into terminal type in the factory, solving the problem of difficult to control on-site production quality.
Smart Images
Figure CN223451199U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to cable accessory manufacturing technical field, especially the cable bus thermal contraction intermediate joint. BACKGROUND
[0002] In the power transmission line, the pipe type bus joint is the most likely to appear problem place in all structures of pipe type bus, other parts of pipe type bus are all made in the production factory, have perfect quality control and good manufacturing environment, and the intermediate joint needs to be made on site or assembled on site, the joint quality cannot be well controlled due to the limitation of on-site conditions, thereby affecting the safe operation of the bus, and the intermediate joint of this mode has high cost. UTILITY MODEL CONTENTS
[0003] The utility model discloses a cable bus thermal contraction intermediate joint, aims at providing a safe and reliable and low -cost intermediate joint type to guarantee that power transmission system long -term safe and stable operation.
[0004] In order to realize the above-mentioned purpose, the utility model discloses a cable bus thermal contraction intermediate joint, including two butt joint conductors and the thermal contraction intermediate joint arranged outside the two butt joint conductors, the two conductors are provided with shielding layer and insulating layer;The two conductors are connected through the welding mode, and the connecting part of the two conductors forms a melt.
[0005] Preferably, the two conductors are a first conductor and a second conductor, the first conductor and the second conductor are connected to each other by horizontal alignment welding to form a melt, and a mirror surface grinding process is used to smooth the surface of the melt.
[0006] Preferably, the melt and the conductor surface are provided with an insulating layer outside, the insulating layer includes a first insulating layer, a second insulating layer and a third insulating layer, wherein the third insulating layer includes an inner insulating layer and an outer insulating layer.
[0007] Preferably, the first conductor and the second conductor are provided with a conductor shielding layer, a first insulating layer, a stress tube layer and the inner insulating layer from inside to outside on the surface of one end close to each other.
[0008] Preferably, the first conductor and the second conductor are provided with a conductor shielding layer, a first insulating layer, an insulating shielding layer and a thermal contraction outer sheath layer from inside to outside on the surface of one end away from each other.
[0009] Preferably, the first conductor and the second conductor are welded to form the melt, and the surface of one end of the conductor away from the melt is provided with a conductor shielding layer, a first insulating layer, an insulating shielding layer, a stress tube layer, a third insulating layer, a half tube layer, a metal shielding layer, an inner sheath layer and a thermal contraction outer sheath layer from inside to outside.
[0010] Preferably, the surface of the molten body is provided with a semiconducting tape layer, a second insulating layer, an outer insulating layer, a semiconducting tube layer, a metal shielding layer, an inner sheath layer and a heat shrinkable outer sheath layer from the inside to the outside, wherein the height of the second insulating layer is the same as the height of the inner insulating layer. After the semiconducting tape layer and the second insulating layer are wrapped around the surface of the molten body, a heat shrinkable intermediate joint is wrapped around the outside.
[0011] Preferably, it further comprises a reinforcing liner, which is arranged inside the connection between the two conductors and abuts against the inner wall of the conductor.
[0012] Preferably, the molten body and the conductor are made of the same material.
[0013] The beneficial effects of the utility model are:
[0014] The two butted conductors in the utility model are connected by welding, which avoids the excessive contact resistance caused by mechanical connection, resulting in local temperature increase at the busbar joint, affecting the safe operation of the busbar, ensuring the reliability of the connection, and the formed molten body connects the two conductors into one, thereby improving the stability of the busbar system. After welding, the joint does not need to use other auxiliary external force compression structures, and there is no bolt connection structure, the contact resistance is small, and it is safer and more reliable. The middle joint uses a heat shrink process, the cost of the heat shrink middle head is low, and it can be prefabricated into a terminal type in the factory, which solves the disadvantage that the cold shrink middle joint cannot be tested one by one. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.
[0016] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;
[0017] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.
[0018] In the above drawings: 10, conductor; 11, first conductor; 12, second conductor; 13, conductor shielding layer; 14, insulation shielding layer; 15, metal shielding layer; 16, outer sheath layer; 17, molten body; 18, reinforced liner; 2, semi-conducting tape layer; 30, insulation layer; 31, first insulation layer; 32, second insulation layer; 33, third insulation layer; 331, inner insulation layer; 332, outer insulation layer; 4, stress tube layer; 5, semi-conducting tube layer; 6, metal shielding layer; 7, inner sheath layer; 8, heat-shrink outer sheath layer.
[0019] The purposes, functional features and advantages of the utility model will be further explained in combination with embodiments with reference to the drawings. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0021] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), and do not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific way, and therefore cannot be understood as a limitation on the utility model. If the specific posture changes, the directionality indications also change accordingly.
[0022] As shown in Figure 1 The utility model provides a cable bus heat shrinkage intermediate joint, contain two butt joint conductors 10 and set up in two butt joint conductors 10 outside heat shrinkage intermediate joint, two conductors 10 outside are provided with shielding layer and insulating layer 30;Two conductors 10 are connected through the welding mode between, make two conductors 10 connection place form molten body 17.
[0023] In the embodiment, as shown in Figure 1 And Figure 2 Two butt joint conductors 10 are connected through the welding mode between, avoid the excessive contact resistance caused by mechanical connection to cause the local temperature rise of bus joint to influence the safe operation of bus, guarantee the reliability of connection, the molten body 17 formed connects two conductors 10 as a whole, improves the stability of bus system, the joint after welding does not need to use other auxiliary external force compression structure, no bolt connection structure, contact resistance is small, safer and more reliable, the intermediate joint uses heat shrinkage process, and the cost of heat shrinkage intermediate head is lower, and can be prefabricated into terminal type in the factory, solves the disadvantage that cold shrinkage intermediate joint cannot be tested root by root.
[0024] In actual implementation, the inner diameter and the outer diameter of the two conductors 10 are the same.
[0025] In an embodiment, the two conductors 10 are respectively a first conductor 11 and a second conductor 12, the first conductor 11 and the second conductor 12 are connected to each other by horizontal alignment welding to form a molten body 17, and the surface of the molten body 17 is smoothed by mirror grinding process.
[0026] In the embodiment, as shown in Figure 1 and Figure 2 , the first conductor 11 and the second conductor 12 are connected to each other by horizontal alignment welding, which can avoid excessive mechanical resistance caused by mechanical connection of the intermediate conductor in the existing structure, and improve the safety of the busbar. After the first conductor 11 and the second conductor 12 are welded, the molten body 17 is mirror ground to polish the surface to be smooth and flat, which avoids partial discharge caused by high surface and burrs.
[0027] In actual implementation, the first conductor 11 and the second conductor 12 are of the same material, preferably copper, and the first conductor 11 and the second conductor 12 are provided with a welding groove at the port.
[0028] In actual implementation, the diameter of the molten body 17 after mirror grinding is close to the diameter of the conductor 10, with a range difference of ±1mm.
[0029] In an embodiment, the molten body 17 and the conductor 10 are provided with an insulating layer 30 outside the surface, the insulating layer 30 includes a first insulating layer 31, a second insulating layer 32 and a third insulating layer 33, wherein the third insulating layer 33 includes an inner insulating layer 331 and an outer insulating layer 332.
[0030] In the embodiment, as shown in Figure 1 and Figure 2 , the insulating layer includes a first insulating layer 31, a second insulating layer 32 and a third insulating layer 33, the first insulating layer 31 is wrapped on a single conductor 10, the second insulating layer 32 is wrapped on the molten body 17, and the third insulating layer 33 is wrapped on the first insulating layer 31 and the second insulating layer 32. The insulating layer which completely covers the entire conductor structure can effectively prevent current leakage and short circuit, so it can prolong the service life of electrical equipment and lines.
[0031] In an embodiment, the surface of the end of the first conductor 11 and the second conductor 12 close to each other is provided with a conductor shielding layer 13, a first insulating layer 31, a stress tube layer 4 and an inner insulating layer 331 from inside to outside.
[0032] In the embodiment, as shown in Figure 1 and Figure 2 , the single conductor 10 is wrapped with a conductor shielding layer 13, a first insulating layer 31, a stress tube layer 4 and an inner insulating layer 331, which improves the waterproofness of the conductor, and the overall structure improves the operation stability and safety of the busbar system.
[0033] In actual implementation, the single conductor 10 is wrapped with the inner insulation layer 331, and the inner insulation layer 331 is preferably formed by wrapping two inner insulation tubes.
[0034] In an embodiment, the first conductor 11 and the second conductor 12 are welded to form the fusion body 17, and the surface of the conductor 10 away from the fusion body 17 is provided from inside to outside with the conductor shielding layer 13, the first insulation layer 31, the insulation shielding layer 14, the stress tube layer 4, the third insulation layer 33, the semi-conductive tube layer 5, the metal shielding layer 615, the inner sheath layer 7, and the heat-shrinkable outer sheath layer 16.
[0035] In the embodiment, as shown in Figure 1 and Figure 2 , the conductor 10 is provided with the third insulation layer 33, the metal shielding layer 615, the inner sheath layer 7, and the heat-shrinkable outer sheath layer 16, thereby ensuring the safety of the cable bus.
[0036] In actual implementation, the third insulation layer 33 is preferably formed by wrapping two inner insulation tubes to form the inner insulation layer 331 and two outer insulation tubes to form the outer insulation layer 332.
[0037] In an embodiment, the surface of the fusion body 17 is provided from inside to outside with the semi-conductive tape layer 2, the second insulation layer 32, the outer insulation layer 332, the semi-conductive tube layer 5, the metal shielding layer 615, the inner sheath layer 7, and the heat-shrinkable outer sheath layer 16, wherein the height of the second insulation layer 32 is the same as the height of the inner insulation layer 331, and the semi-conductive tape layer 2 and the second insulation layer 32 are wound on the surface of the fusion body 17, and then the heat-shrinkable intermediate joint is wrapped outside.
[0038] In the embodiment, as shown in Figure 1 and Figure 2 , the fusion body 17 is provided with the second insulation layer 32, the outer insulation layer 332, the metal shielding layer 615, the inner sheath layer 7, and the heat-shrinkable outer sheath layer 16, thereby forming a complete and tight seal outside the fusion body 17, ensuring the safety of the cable bus, and the height of the second insulation layer 32 is the same as the height of the inner insulation layer 331, thereby ensuring the flatness of the outer layer after the connection of the conductor 10 and improving the stability of the cable bus.
[0039] In an embodiment, the heat-shrinkable intermediate joint of the cable bus includes a reinforcing liner tube 18, which is arranged inside the connection position of the two conductors 10 and abuts against the inner wall of the conductor 10.
[0040] In the embodiment, as shown in Figure 1 and Figure 2 , the reinforcing liner tube 18 is arranged inside the connection position of the two conductors 10 and abuts against the inner wall of the conductor 10, thereby providing a fixed support during the welding process of the conductor 10 and ensuring the firmness during the welding process of the conductor 10.
[0041] In actual implementation, the reinforcing liner pipe 18 used in welding is not specifically limited in thickness, and is preferably the same as the thickness of the conductor 10, and the reinforcing liner pipe 18 is preferably made of stainless steel.
[0042] In an embodiment, the molten body 17 and the conductor 10 are made of the same material.
[0043] In the embodiment, as shown in Figure 1 and Figure 2 , the molten body 17 and the conductor 10 are made of the same material, which ensures the stability of the resistance of the busbar after welding and improves the safety of the cable busbar.
[0044] In actual implementation, the material of the molten body is preferably copper.
[0045] In the utility model, the two butt-jointed conductors are connected by welding, which avoids excessive contact resistance caused by mechanical connection, prevents the local temperature of the busbar joint from rising, and ensures the safe operation of the busbar, thereby ensuring the reliability of the connection, the molten body connects the two conductors into one, improves the stability of the busbar system, and the joint after welding does not need to use other auxiliary external force compression structure and bolt connection structure, has small contact resistance, is safer and more reliable, the intermediate joint uses heat shrinkage process, the cost of the heat shrinkage intermediate joint is low, and the intermediate joint can be prefabricated into a terminal type in the factory, thereby solving the disadvantage that the cold shrinkage intermediate joint cannot be tested root by root.
[0046] The preferred embodiments of the utility model are described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the utility model without creative labor. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment on the basis of the existing technology according to the concept of the utility model shall be within the protection scope defined by the claims.
Claims
1. A cable busbar heat shrinkable intermediate joint, characterized in that: include: Two butted conductors and a heat shrinkable intermediate joint arranged outside the two butted conductors, a shielding layer and an insulating layer are arranged outside the two conductors; the two conductors are connected by welding, so that a molten body is formed at the connection between the two conductors.
2. The cable busbar heat shrinkable intermediate joint according to claim 1, characterized in that: The two conductors are respectively a first conductor and a second conductor. The first conductor and the second conductor are connected to each other by horizontal alignment welding to form a molten body. The surface of the molten body is smoothed by a mirror grinding process.
3. The cable busbar heat shrinkable intermediate joint according to claim 2, characterized in that: An insulating layer is provided outside the surface of the melt and the conductor, and the insulating layer includes a first insulating layer, a second insulating layer and a third insulating layer, wherein the third insulating layer includes an inner insulating layer and an outer insulating layer.
4. The cable busbar heat shrinkable intermediate joint according to claim 3, characterized in that: The surfaces of one end of the first conductor and the second conductor close to each other are provided with a conductor shielding layer, a first insulating layer, a stress tube layer and the inner insulating layer from the inside to the outside.
5. The cable busbar heat shrinkable intermediate joint according to claim 2, characterized in that: The surfaces of the ends of the first conductor and the second conductor that are away from each other are provided with a conductor shielding layer, a first insulating layer, an insulating shielding layer and a heat shrinkable outer sheath layer from the inside out.
6. The cable busbar heat shrinkable intermediate joint according to claim 3, characterized in that: The first conductor and the second conductor are welded to form the molten body, and the outer surface of the conductor at one end away from the molten body is provided with a conductor shielding layer, a first insulating layer, an insulating shielding layer, a stress tube layer, a third insulating layer, a semi-conducting layer, a metal shielding layer, an inner sheath layer and a heat shrink outer sheath layer from the inside to the outside.
7. The cable busbar heat shrinkable intermediate joint according to claim 6, characterized in that: The surface of the molten body is provided with a semiconducting tape layer, a second insulating layer, an outer insulating layer, a semiconducting tube layer, a metal shielding layer, an inner sheath layer and a heat-shrinkable outer sheath layer from the inside to the outside, wherein the height of the second insulating layer is the same as that of the inner insulating layer. After the semiconducting tape layer and the second insulating layer are wrapped around the surface of the molten body, a heat-shrinkable intermediate joint is wrapped around the outside.
8. The cable busbar heat shrinkable intermediate joint according to claim 1, characterized in that: It also includes a reinforcing liner, which is arranged inside the connection between the two conductors and abuts against the inner wall of the conductor.
9. The cable busbar heat shrinkable intermediate joint according to claim 1, characterized in that: The molten body and the conductor are made of the same material.