CN112615223A - High-voltage large-current coaxial cable connecting structure and connecting method - Google Patents
High-voltage large-current coaxial cable connecting structure and connecting method Download PDFInfo
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- CN112615223A CN112615223A CN202110050766.0A CN202110050766A CN112615223A CN 112615223 A CN112615223 A CN 112615223A CN 202110050766 A CN202110050766 A CN 202110050766A CN 112615223 A CN112615223 A CN 112615223A
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- coaxial cable
- butt joint
- joint pipe
- sleeve
- wall
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
- H01R24/38—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
- H01R24/40—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding
- H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
- H01R13/6581—Shield structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/20—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for assembling or disassembling contact members with insulating base, case or sleeve
Abstract
The application discloses a high-voltage large-current coaxial cable connecting structure and a connecting method, wherein the connecting structure comprises a connector, a copper mesh fixing component and a corrugated pipe; the copper mesh fixing assembly comprises a butt joint pipe, a conical sleeve and an outer sleeve, the conical sleeve is sleeved at one end of the butt joint pipe, and a conical space for clamping the copper mesh is formed between the conical sleeve and the butt joint pipe; one end of the outer sleeve is sleeved on the conical sleeve, the inner wall of the outer sleeve and the outer wall of the conical sleeve are provided with matched conical surfaces, and the other end of the outer sleeve is provided with a boss matched with the step; the middle part of the butt joint pipe is provided with an external thread matched with the threaded hole, and the other end of the butt joint pipe is provided with a connecting end; the end of the corrugated pipe is provided with a connecting part which is detachably connected with the connecting end. The method for connecting the high-voltage large-current coaxial cable connecting structure with one end of the coaxial cable comprises the following steps: preparation work before connection: fixing the copper mesh: connection of the corrugated pipe: this application connection structure intensity is high, and the reliability is high, can guarantee the connection performance of junction.
Description
Technical Field
The application belongs to the technical field of cable connection, and particularly relates to a high-voltage large-current coaxial cable connection structure and a connection method.
Background
To increase the pulse power of a high power pulse device, the loop inductance of the high power pulse device needs to be reduced, and a coaxial cable is often used to transmit a large pulse current to a load, wherein the transmitted pulse current is as high as tens of even hundreds of kiloamperes. In the specific application of wire electrical explosions to generate shock waves, the isotype energy converter is operated deep inside the borehole. Patent "a heavy current transmission coaxial line formula drilling rod" with application number CN201810575812.7 discloses a sectional type coaxial type heavy current transmission mode, though there are many advantages in its application field, there are the following problems in the connection point of two sections of coaxial cables and the connection structure of coaxial cable and coaxial load: the strength of the connecting structure is not enough, and the reliability is low; the contact resistance of the connection point is large, which causes non-uniform current flowing through the connection point and the connection structure. When the contact resistance is large, part of the electric energy is consumed, thereby reducing the electric energy transmission efficiency; the lost electric energy often occurs in the form of electric sparks, which seriously damages the connection performance of the connection point and the connection structure and even leads the insulating material in the connection point and the connection structure to lose the insulating capability; when the current is unevenly distributed on the circumference of the coaxial cable, the electric force formed by the current can lead the outer conductor to creep, so that the outer conductor is extruded towards one direction, and the coaxial cable loses the coaxiality. The coaxial cable joint is often required to move, rotate or move along with the axial load, so that the flexibility characteristic of the coaxial cable joint needs to be kept, but the current coaxial cable joint is often in a structure that a copper wire is wound on an outer conductor, an argon arc welding corrugated copper sheath outer conductor or an argon arc welding corrugated aluminum tape is adopted, the structure is low in connection reliability and poor in flexibility, and the current connection structure is difficult to meet the use requirement.
Disclosure of Invention
The embodiment of the application provides a high-voltage large-current coaxial cable connection structure and a connection method, and solves the problems that in the prior art, the connection structure of a coaxial cable is low in connection strength, large in contact resistance of connection points, poor in flexibility and low in connection reliability.
In a first aspect, an embodiment of the present invention provides a high-voltage large-current coaxial cable connection structure, including a cylindrical connector, a copper mesh fixing assembly, and a corrugated pipe;
one end of the connector is provided with a threaded hole and a through hole with the inner diameters being sequentially reduced, and a step is formed at the joint of the threaded hole and the through hole;
the copper mesh fixing assembly comprises a butt joint pipe, a conical sleeve and an outer sleeve, the conical sleeve is sleeved at one end of the butt joint pipe, and a conical space for clamping a copper mesh is formed between the inner wall of the conical sleeve and the outer wall of the butt joint pipe; one end of the outer sleeve is sleeved on the conical sleeve, the inner wall of the outer sleeve and the outer wall of the conical sleeve are provided with matched conical surfaces, and the other end of the outer sleeve is provided with a boss matched with the step;
the middle part of the butt joint pipe is provided with an external thread matched with the threaded hole, and the other end of the butt joint pipe is provided with a connecting end; the end part of the corrugated pipe is provided with a connecting part which is detachably connected with the connecting end.
Further, the connecting end is an external thread arranged at the end part of the butt-joint pipe;
the connecting part (4) comprises a connecting ring (41) fixed at the end part of the corrugated pipe (3) and a fastening ring (42); one end of the fastening ring (42) is provided with an internal thread matched with the external thread at the end of the butt joint pipe (21), the inner wall of the other end of the fastening ring (42) is provided with a clamping ring (421), and the connecting ring (41) extends into the outer wall of one end of the fastening ring (42) and is provided with a ring body (411) matched with the clamping ring (421).
Furthermore, the inner wall of the conical sleeve and the outer wall of the butt joint pipe matched with the conical sleeve are conical surfaces with the same taper;
the outer wall of the conical sleeve and the inner wall of the outer sleeve matched with the conical sleeve are conical surfaces with the same taper.
Furthermore, the included angle between the inner wall of the conical sleeve (22) and the axis of the conical sleeve (22) is 2-4 degrees, and the included angle between the outer wall of the conical sleeve (22) and the axis of the conical sleeve (22) is 5-7 degrees.
In a second aspect, an embodiment of the present invention further provides a method for connecting a high-voltage large-current coaxial cable, including a method for connecting a coaxial cable with the above-mentioned connection structure, a method for splicing two segments of coaxial cables by using the above-mentioned connection structure, and a method for splicing a coaxial cable with a coaxial load by using the above-mentioned connection structure;
a method for connecting the connecting structure with a coaxial cable specifically comprises the following steps:
preparation work before connection: cutting one end of the coaxial cable and the copper mesh sleeved outside the coaxial cable into a set length; then the end part of the cable sequentially passes through the connector, the butt joint pipe and the corrugated pipe;
fixing the copper mesh: uniformly placing the end part of the copper mesh in a conical space formed between the inner wall of the conical sleeve and the outer wall of the butt joint pipe; inserting one end of the butt joint pipe into a threaded hole of the connector, and then rotating the butt joint pipe to enable the external thread in the middle of the butt joint pipe to be screwed into the threaded hole; at the moment, one end of the outer sleeve abuts against the step, the other end of the outer sleeve pushes the conical sleeve to one end far away from the connector, so that the movement directions of the conical sleeve and the butt joint pipe are opposite, and the copper mesh between the conical sleeve and the butt joint pipe is firmly fixed;
connection of the corrugated pipe: connecting the connecting end of the butt joint pipe with one end of the corrugated pipe through a connecting part;
a method for connecting two sections of coaxial cables by adopting the connecting structure specifically comprises the following steps:
connecting a high-voltage large-current coaxial cable connecting structure with one end of a first section of coaxial cable;
connecting the end part of the second section of coaxial cable with one end of the first section of coaxial cable extending out of the corrugated pipe;
fixing the copper mesh outside the second section of coaxial cable through another high-voltage large-current coaxial cable connecting structure:
connecting the butt joint pipe at the end part of the second section of coaxial cable with the corrugated pipe at the end part of the first section of coaxial cable through a connecting part;
a method for connecting two sections of coaxial cables by adopting the connecting structure specifically comprises the following steps:
connecting a high-voltage large-current coaxial cable connecting structure with one end of a coaxial cable;
connecting one end of the coaxial cable extending out of the corrugated pipe with a coaxial load cable;
and one end of the corrugated pipe close to the coaxial load is connected with the end part of the coaxial load through a connecting part.
One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:
the embodiment of the invention provides a high-voltage large-current coaxial cable connecting structure, which can change the radial width of a conical space along a conical sleeve by changing the axial position of the conical sleeve on a butt joint pipe, so that when a copper net is placed in the conical space, the copper net can be fastened by reducing the radial width of the conical space along the conical sleeve, the reliability of the copper net connecting part can be improved by a copper net fixing component, the copper net connecting part is uniformly connected to the butt joint pipe, the uniform distribution of current is ensured, the contact resistance of the connecting part is reduced, the electric energy transmission efficiency is ensured, and the damage of an insulating layer of a coaxial cable can be avoided; the corrugated pipe is sleeved at the joint of the two sections of coaxial cables, so that the reliability of the joint of the coaxial cables is not influenced by the lateral force caused by the movement, rotation and movement along with the axial load of the coaxial cables. The connecting structure has high strength and high reliability, can ensure the connection performance of the connecting part, and meets the use requirement of the coaxial cable.
The embodiment of the invention also provides a high-voltage large-current coaxial cable connecting method, in the connecting method, the copper mesh fixing component fixes the copper mesh, so that the end part of the copper mesh can be firmly and uniformly clamped, the use function of the copper mesh is not influenced, the contact resistance is reduced, and meanwhile, the connecting method is convenient to disassemble, and further meets the connecting requirement of the coaxial cable; the end part of the corrugated pipe is connected with the copper mesh on the coaxial cable through the metal part, so that the flexibility of the joint is ensured, and meanwhile, the joint of the two sections of coaxial cables can be ensured to have a shielding layer, further, when the coaxial cable passes through large current, a magnetic field generated by the coaxial cable can be effectively shielded in the coaxial cable, and leaked current is led out through the corrugated pipe when a core wire of the coaxial cable is damaged; the corrugated pipe has flexibility, can protect the junction of the coaxial cables after the corrugated pipe is connected, eliminates the lateral stress between the load and the electric coupler, and avoids the problem that the lateral extrusion deformation of the copper mesh of the outer conductor is caused by the lateral stress.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a high-voltage large-current coaxial cable connection structure according to an embodiment of the present invention.
Fig. 2 is a schematic connection diagram of a connector and a copper mesh fixing component according to an embodiment of the present invention.
Fig. 3 is a schematic connection diagram of a bellows and a connection portion according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a connector according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a butt joint pipe according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a taper sleeve according to an embodiment of the present invention.
FIG. 7 is a schematic view of an outer sleeve according to an embodiment of the present invention.
Fig. 8 is a schematic structural diagram of a connection of two sections of high-voltage large-current coaxial cables according to an embodiment of the present invention.
Fig. 9 is a schematic structural diagram of a connection between a high-voltage large-current coaxial cable and a coaxial load according to an embodiment of the present invention.
Reference numerals: 1-a connector; 11-a threaded hole; 12-a through hole; 13-step; 2-fixing the copper mesh component; 21-butt joint pipe; 211-a connection end; 22-a conical sleeve; 23-an outer sleeve; 231-a boss; 24-a conical space; 3-a corrugated tube; 4-a connecting part; 41-connecting ring; 411-ring body; 42-a fastening ring; 421-a snap ring; 5-a coaxial cable; 6-copper mesh; 7-coaxial loading.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 9, the high-voltage large-current coaxial cable connection structure provided by the embodiment of the present invention includes a cylindrical connector 1, a copper mesh fixing assembly 2, and a corrugated pipe 3;
one end of the connector 1 is provided with a threaded hole 11 and a through hole 12 with successively reduced inner diameters, and a step 13 is formed at the joint of the threaded hole 11 and the through hole 12.
The copper mesh fixing component 2 comprises a butt joint pipe 21, a conical sleeve 22 and an outer sleeve 23, wherein the conical sleeve 22 is sleeved at one end of the butt joint pipe 21, and a conical space 24 for clamping the copper mesh 6 is formed between the inner wall of the conical sleeve 22 and the outer wall of the butt joint pipe 21; one end of the outer sleeve 23 is sleeved on the conical sleeve 22, the inner wall of the outer sleeve 23 and the outer wall of the conical sleeve 22 are provided with matched conical surfaces, and the other end of the outer sleeve 23 is provided with a boss 231 matched with the step 13.
The middle part of the butt joint pipe 21 is provided with an external thread matched with the threaded hole 11, and the other end of the butt joint pipe 21 is provided with a connecting end 211; the end of the corrugated pipe 3 is provided with a connecting part 4 detachably connected with the connecting end 211.
It should be noted that, as shown in fig. 4, a through hole section may be further disposed between the threaded hole 11 and the through hole 12, the aperture of the through hole section is located between the threaded hole 11 and the through hole 12, and the through hole section is disposed to be convenient for matching with the boss 231 of the outer wall of the outer sleeve 23.
As shown in fig. 2, a tapered space 24 is formed between the inner wall of the tapered sleeve 22 and the outer wall of the docking pipe 21, and the tapered space 24 is formed by the inner tapered wall of the tapered sleeve 22 and the outer tapered wall of the docking pipe 21. Through changing taper sleeve 22 at the ascending position of butt joint pipe 21 axial, and then can change taper space 24 along the radial width of taper sleeve 22, consequently when placing copper mesh 6 in taper space 24, can come copper mesh 6 fastening along the radial width of taper sleeve 22 through reducing taper space 24, can improve the reliability of copper mesh 6 junction through copper mesh fixed subassembly 2, make its evenly connected in butt joint pipe 21, guarantee electric current evenly distributed, and reduce the contact resistance of junction, guarantee electric energy transmission efficiency, still can avoid coaxial cable 5's insulating layer damage.
The inner wall of the outer sleeve 23 and the outer wall of the conical sleeve 22 are provided with matching conical surfaces, so that the conical sleeve 22 can be moved towards one side of the butt joint pipe 21 by moving the outer sleeve 23, and the width of the conical space 24 along the radial direction of the conical sleeve 22 is reduced.
The conical surfaces are conical surfaces formed by outward contraction of the outer diameter, so that the butt joint pipe 21, the conical sleeve 22 and the outer sleeve 23 are convenient to assemble and disassemble.
As shown in fig. 7, the boss 231 of the present embodiment is a step provided on the outer wall of the outer sleeve 23, and when the abutment pipe 21 is screwed into the connector 1 after the boss 231 on the outer wall of the outer sleeve 23 abuts against the step 13 in the connector 1, the outer sleeve 23 can be kept in a stationary state, the tapered sleeve 22 moves in the direction of the connector 1, and the width of the tapered space 24 in the radial direction of the tapered sleeve 22 is reduced, thereby fastening the copper mesh 6.
As shown in fig. 3 and 8, the corrugated tube 3 is sleeved on the joint of two coaxial cables 5, so that the reliability of the joint is not affected by the lateral force caused by the movement, rotation and the movement along with the axial load 7 of the coaxial cable 5.
The connecting structure has high strength and high reliability, can ensure the connection performance of the connecting part, and meets the use requirement of the coaxial cable 5.
In this embodiment, as shown in fig. 5, the connection end 211 is an external thread provided at the end of the butt pipe 21;
as shown in fig. 3, the connection portion 4 includes a connection ring 41 fixed to an end of the bellows 3, and a fastening ring 42; one end of the fastening ring 42 is provided with an internal thread matched with the external thread at the end of the butt joint pipe 21, the inner wall of the other end of the fastening ring 42 is provided with a clamping ring 421, and the outer wall of one end of the connecting ring 41 extending into the fastening ring 42 is provided with a ring body 411 matched with the clamping ring 421.
It should be noted that the butt joint pipe 21, the tapered sleeve 22, the connection ring 41, the corrugated pipe 3, and the fastening ring 42 of the present invention are made of metal materials, so as to ensure the connection reliability of the two copper mesh segments 6 and achieve the shielding function of the joint.
After one end of the connection ring 41 far away from the ring body 411 passes through the fastening ring 42, one end of the connection ring 41 far away from the ring body 411 is connected with the corrugated pipe 3 through argon arc welding, and therefore the assembly of the connection part 4 and the corrugated pipe 3 is achieved. When the corrugated pipe 3 is installed, the corrugated pipe 3 can be firmly fixed to the end of the butt pipe 21 or the corrugated pipe 3 can be fixed to one end of the coaxial load 7 by the internal thread of the end of the fastening ring 42.
As shown in fig. 2, the inner wall of the tapered sleeve 22 and the outer wall of the adapter tube 21 and the tapered sleeve 22 are tapered surfaces with the same taper; and then can firmly carry out the centre gripping with inside and outside two sides of copper mesh 6, avoid its tapering difference and lead to the problem that can only carry out the centre gripping with the part of copper mesh 6.
The outer wall of the conical sleeve 22 and the inner wall of the outer sleeve 23 matched with the conical sleeve 22 are conical surfaces with the same taper, so that the conical sleeve 22 can be uniformly applied with force through the outer sleeve 23, and the reliability of the copper mesh 6 in fastening is improved.
As shown in fig. 6, the included angle between the inner wall of the tapered sleeve 22 and the axis of the tapered sleeve 22 is 3 ° and the included angle between the outer wall of the tapered sleeve 22 and the axis of the tapered sleeve 22 is 6 °.
It should be noted that, through many experiments, the copper mesh 6 can be well fastened when the included angle between the inner wall of the conical sleeve 22 and the axis of the conical sleeve 22 is 3 degrees, and the copper mesh 6 is easily sleeved on the conical sleeve 22.
The angle between the outer wall of the conical sleeve 22 and the axis of the conical sleeve 22 is 6 degrees, so that the conical sleeve 22 and the outer sleeve 23 can relatively move for a small distance to fasten the copper mesh 6.
As shown in fig. 1 to 9, a high-voltage large-current coaxial cable connecting method includes a method of connecting a coaxial cable with the connecting structure as described above, a method of connecting two lengths of coaxial cables with the connecting structure as described above, and a method of connecting a coaxial cable with a coaxial load with the connecting structure as described above;
a method for connecting a connecting structure with a coaxial cable specifically comprises the following steps:
preparation work before connection: cutting one end of a coaxial cable 5 and a copper mesh 6 sleeved outside the coaxial cable 5 into a set length; the end of the coaxial cable 5 is then passed through the connector 1, the interface tube 21, and the corrugated tubing 3 in that order.
After cutting the coaxial cable 5, the coaxial cable 5 and the insulating layer thereon pass through the connector 1, the butt joint pipe 21 and the corrugated pipe 3 together; and the copper mesh 6 is cut according to the position of the connector 1 so as to smoothly place the end of the copper mesh 6 in the tapered space 24.
Fixing the copper mesh: uniformly placing the end part of the copper mesh 6 in a conical space 24 formed between the inner wall of the conical sleeve 22 and the outer wall of the butt joint pipe 21; inserting one end of the butt joint pipe 21 into the threaded hole 11 of the connector 1, and then rotating the butt joint pipe 21 to enable the external thread in the middle of the butt joint pipe 21 to be screwed into the threaded hole 11; at this time, one end of the outer sleeve 23 abuts against the step 13, and the other end of the outer sleeve 23 pushes the tapered sleeve 22 to the end away from the connector 1, so that the movement directions of the tapered sleeve 22 and the butt pipe 21 are opposite, and the copper mesh 6 between the tapered sleeve 22 and the butt pipe 21 is firmly fixed.
Fix copper mesh 6 through copper mesh fixed component 2, can make the even chucking of 6 tip of copper mesh firm, can not influence the service function of copper mesh 6 to reduce contact resistance, convenient to detach simultaneously, and then satisfy coaxial cable 5's connection demand.
Connection of the corrugated pipe: connecting the connecting end 211 of the butt joint pipe 21 with one end of the corrugated pipe 3 through the connecting part 4; the corrugated pipe 3 has flexibility, the coaxial cable 5 can be protected after the corrugated pipe 3 is connected, the lateral stress between the load and the electric coupler is eliminated, and the problem that the lateral extrusion deformation of the outer conductor copper mesh 6 is caused by the lateral stress is avoided.
A method for connecting two sections of coaxial cables by adopting a connecting structure specifically comprises the following steps:
connecting a high-voltage large-current coaxial cable connecting structure with one end of a first section of coaxial cable 5; the operation steps are the same as the above-described steps of connecting the high-voltage large-current coaxial cable connection structure to one end of the coaxial cable 5.
Connecting the end of the second section of coaxial cable 5 with one end of the first section of coaxial cable 5 extending out of the corrugated pipe 3; and after the cables at the two ends are connected, completing the connection of the cable transmission part.
Fixing the copper mesh 6 outside the second section of coaxial cable 5 through another high-voltage large-current coaxial cable connecting structure: this operation is the same as the above-described fixing of the copper mesh 6.
Connecting the butt joint pipe 21 at the end of the second section of coaxial cable 5 with the corrugated pipe 3 at the end of the first section of coaxial cable 5 through the connecting part 4; thereby completing the splicing of the two sections of high voltage high current coaxial cables 5 as shown in fig. 8.
The two ends of the corrugated pipe 3 are connected with the copper meshes 6 on the two sections of coaxial cables 5 through metal parts, so that the flexibility of the joint is guaranteed, and meanwhile, the joint of the two sections of coaxial cables 5 can be guaranteed to be provided with a shielding layer, further, when the coaxial cables 5 pass through large current, a magnetic field generated by the coaxial cables 5 can be effectively shielded in the coaxial cables 5, and leaked current is led out through the corrugated pipe 3 when core wires of the coaxial cables 5 are damaged.
A method for connecting a coaxial cable with a coaxial load by adopting the connecting structure specifically comprises the following steps:
connecting a high-voltage large-current coaxial cable connecting structure with one end of a coaxial cable 5;
one end of the coaxial cable 5 extending out of the corrugated pipe 3 is connected with a cable of a coaxial load 7; after connection, whether the cable is in a pass-through state is tested.
One end of the corrugated tube 3 close to the coaxial load 7 is connected with the end of the coaxial load 7 through the connecting part 4, so that the connection of the high-voltage large-current coaxial cable 5 and the coaxial load 7 is completed, as shown in fig. 9. The corrugated tube 3 provides flexibility and a shielding function at the junction between the coaxial cable 5 and the coaxial load 7.
In this embodiment, the connection of the bellows specifically includes the following steps:
the end of the fastening ring 42 with the internal thread is screwed into the external thread at the end of the butt joint pipe 21, one side of the ring body 411 is abutted against the end surface of the butt joint pipe 21, and the other side of the ring body 411 is abutted against one side of the clamping ring 421. The connection mode is simple and reliable, and is convenient to disassemble, and meanwhile, the connection part of the corrugated pipe 3 and the butt joint pipe 21 is made of rigid metal materials, so that the contact resistance can be further reduced.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (5)
1. The utility model provides a high-pressure heavy current coaxial cable connection structure which characterized in that: comprises a cylindrical connector (1), a copper mesh fixing component (2) and a corrugated pipe (3);
one end of the connector (1) is provided with a threaded hole (11) and a through hole (12) with sequentially reduced inner diameters, and a step (13) is formed at the joint of the threaded hole (11) and the through hole (12);
the copper mesh fixing assembly (2) comprises a butt joint pipe (21), a conical sleeve (22) and an outer sleeve (23), the conical sleeve (22) is sleeved at one end of the butt joint pipe (21), and a conical space (24) for clamping the copper mesh (6) is formed between the inner wall of the conical sleeve (22) and the outer wall of the butt joint pipe (21); one end of the outer sleeve (23) is sleeved on the conical sleeve (22), the inner wall of the outer sleeve (23) and the outer wall of the conical sleeve (22) are provided with matched conical surfaces, and the other end of the outer sleeve (23) is provided with a boss (231) matched with the step (13);
the middle part of the butt joint pipe (21) is provided with an external thread matched with the threaded hole (11), and the other end of the butt joint pipe (21) is provided with a connecting end (211); the end of the corrugated pipe (3) is provided with a connecting part (4) detachably connected with the connecting end (211).
2. A high-voltage large-current coaxial cable connection structure according to claim 1, wherein: the connecting end (211) is an external thread arranged at the end part of the butt joint pipe (21);
the connecting part (4) comprises a connecting ring (41) fixed at the end part of the corrugated pipe (3) and a fastening ring (42); one end of the fastening ring (42) is provided with an internal thread matched with the external thread at the end of the butt joint pipe (21), the inner wall of the other end of the fastening ring (42) is provided with a clamping ring (421), and the connecting ring (41) extends into the outer wall of one end of the fastening ring (42) and is provided with a ring body (411) matched with the clamping ring (421).
3. A high-voltage large-current coaxial cable connection structure according to claim 1, wherein: the inner wall of the conical sleeve (22) and the outer wall of the butt joint pipe (21) matched with the conical sleeve (22) are conical surfaces with the same taper;
the outer wall of the conical sleeve (22) and the inner wall of the outer sleeve (23) matched with the conical sleeve (22) are conical surfaces with the same taper.
4. A high-voltage large-current coaxial cable connection structure according to claim 3, wherein: the included angle between the inner wall of the conical sleeve (22) and the axis of the conical sleeve (22) is 2-4 degrees, and the included angle between the outer wall of the conical sleeve (22) and the axis of the conical sleeve (22) is 5-7 degrees.
5. A method of connecting a high-voltage high-current coaxial cable, comprising a method of connecting the connection structure according to any one of claims 1 to 4 to a coaxial cable, a method of splicing two lengths of coaxial cable using the connection structure according to any one of claims 1 to 4, and a method of splicing a coaxial cable to a coaxial load using the connection structure according to any one of claims 1 to 4;
a method for connecting the connecting structure with a coaxial cable specifically comprises the following steps:
preparation work before connection: cutting one end of the coaxial cable (5) and the copper mesh (6) sleeved outside the coaxial cable (5) into a set length; then the end part of the coaxial cable (5) sequentially passes through the connector (1), the butt joint pipe (21) and the corrugated pipe (3);
fixing the copper mesh: uniformly placing the end part of the copper mesh (6) in the conical space (24) formed between the inner wall of the conical sleeve (22) and the outer wall of the butt joint pipe (21); inserting one end of the butt joint pipe (21) into a threaded hole (11) of the connector (1), and then rotating the butt joint pipe (21) to enable an external thread in the middle of the butt joint pipe to be screwed into the threaded hole (11); at the moment, one end of the outer sleeve (23) is abutted against the step (13), the other end of the outer sleeve (23) pushes the conical sleeve (22) to one end far away from the connector (1), the movement directions of the conical sleeve (22) and the butt joint pipe (21) are opposite, and the copper mesh (6) between the conical sleeve (22) and the butt joint pipe (21) is further fixed firmly;
connection of the corrugated pipe: connecting the connecting end (211) of the butt joint pipe (21) with one end of the corrugated pipe (3) through the connecting part (4);
a method for connecting two sections of coaxial cables by adopting the connecting structure specifically comprises the following steps:
connecting a high-voltage large-current coaxial cable connecting structure with one end of a first section of coaxial cable (5);
connecting the end part of the second section of coaxial cable (5) with one end of the first section of coaxial cable (5) extending out of the corrugated pipe (3);
fixing a copper net (6) outside the second section of coaxial cable (5) through another high-voltage large-current coaxial cable connecting structure:
connecting a butt joint pipe (21) at the end part of the second section of coaxial cable (5) with a corrugated pipe (3) at the end part of the first section of coaxial cable (5) through a connecting part (4);
a method for connecting a coaxial cable with a coaxial load by using the connecting structure specifically comprises the following steps:
connecting a high-voltage large-current coaxial cable connecting structure with one end of a coaxial cable (5);
one end of the coaxial cable (5) extending out of the corrugated pipe (3) is connected with a cable of a coaxial load (7);
and one end of the corrugated pipe (3) close to the coaxial load (7) is connected with the end part of the coaxial load (7) through a connecting part (4).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113839153A (en) * | 2021-10-12 | 2021-12-24 | 中国人民解放军国防科技大学 | High-voltage large-current coaxial cable connector |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113839153A (en) * | 2021-10-12 | 2021-12-24 | 中国人民解放军国防科技大学 | High-voltage large-current coaxial cable connector |
| CN113839153B (en) * | 2021-10-12 | 2022-05-31 | 中国人民解放军国防科技大学 | High-voltage large-current coaxial cable connector |
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