CN111490418B - Oil-immersed high-voltage coaxial cable connector - Google Patents
Oil-immersed high-voltage coaxial cable connector Download PDFInfo
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- CN111490418B CN111490418B CN202010327848.0A CN202010327848A CN111490418B CN 111490418 B CN111490418 B CN 111490418B CN 202010327848 A CN202010327848 A CN 202010327848A CN 111490418 B CN111490418 B CN 111490418B
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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
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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
- H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
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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
- H01R13/46—Bases; Cases
- H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
- H01R13/5219—Sealing means between coupling parts, e.g. interfacial seal
Abstract
The invention discloses an oil immersion high-voltage coaxial cable connector, and aims to provide a high-voltage coaxial cable connector with good sealing and insulating effects under the oil immersion condition. The invention is composed of a cable male head, a cable female head and an oil injection cylinder; the cable male head consists of a male head flange, an outer conductor connector, an inner conductor connector and a rubber fixing piece; the cable female head consists of a female head flange, a hollow rubber round table and a female head connector; the oil filling cylinder consists of an oil filling cylinder shell, an inner conductor column and an insulator; the cable male head is connected with the oil injection cylinder, the high-voltage coaxial cable sequentially penetrates through the cable male head and the cable female head and is inserted into the oil injection cylinder, and transformer oil is injected into the oil injection cylinder. The hollow rubber round platform is located between the female flange and the cable, the rubber fixing piece is located between the male flange and the female flange, and the hollow rubber round platform is extruded through the rubber fixing piece to be deformed so as to fill a gap, and therefore sealing of the oil filling cylinder shell is achieved. The invention has the advantages of good sealing effect, high insulation grade and simple structure.
Description
Technical Field
The invention relates to the technical field of high-power pulse driving sources, in particular to an oil-immersed high-voltage coaxial cable connector.
Background
The demand of national defense and industrial applications has led to the development of high-power pulse drive source technology towards solid stating and modularization, and the applications include high-power microwave, high-power pulse laser, material surface treatment, industrial waste gas and water treatment, food sterilization and disinfection, and the like. The high-voltage coaxial cable is used for realizing the connection between the solid-state modules, and convenient conditions can be provided for the debugging of the modules and the integration of the device; therefore, the development of the high-voltage coaxial cable matching sleeve connector with excellent performance has very important significance for debugging and running of the device. The single-core or multi-core joint of the existing high-voltage cable is mature and has commercial products; however, the mating connector of the high-voltage coaxial cable is a non-standard product in most cases, and is developed according to the corresponding requirements of the device.
High power pulses generally have three characteristics: 1. a high voltage. The peak value of the pulse voltage can reach hundreds of kV, and the insulation strength of the joint is required to be high; 2. a large current. The pulse current can reach dozens of kA, the cable joint is required to have strong current capacity and stable contact, and ignition caused by uneven contact of the joint is avoided; 3. short pulses. The pulse duration is generally hundreds of ns, the rising edge is tens of ns, and the cable joint inductance is required to be small. For the application scene of the voltage below hundred kV, a high-voltage coaxial cable joint scheme in the air environment can be adopted, and for the situation that the voltage reaches above hundred kV, the high-voltage coaxial cable joint scheme under the oil immersion condition is generally required to be adopted. The high-voltage coaxial cable connector in a gas environment has a mature scheme, the high-voltage coaxial cable connector under the oil immersion condition is rarely researched at present, and the main technical problems are that the oil injection cavity of the cable connector is difficult to seal in a conventional connection mode, and the risk that transformer oil slowly leaks from a connector gap exists. The oil immersion condition refers to the condition that the high-voltage coaxial cable connector works in an insulating oil immersion environment, and the transformer oil generally adopts No. 25 or No. 45 transformer oil.
A typical cable and a matched high-voltage coaxial cable connector in a gas environment are shown in figure 1 and mainly comprise a high-voltage coaxial cable 1, a cable male head 2 and a cable female head 3. The typical structure of the high-voltage coaxial cable 1 is shown in fig. 2, and mainly comprises an inner insulator 1-1, a cable inner conductor 1-2, an outer insulator 1-3, a cable outer conductor 1-4 and an insulating sheath 1-5 which are coaxially nested from inside to outside, wherein the outer diameters of the inner insulator 1-1, the cable inner conductor 1-2, the outer insulator 1-3, the cable outer conductor 1-4 and the insulating sheath 1-5 are respectively D1, D2, D3, D4 and D5.
The male cable connector 2 is generally composed of a male screw cap 2-1, an outer conductor connector 2-2 and an inner conductor connector 2-3. The cable female head 3 generally comprises a female head flange 3-1, an insulating sleeve 3-2 and a female head connector 3-3, wherein the female head flange 3-1, the insulating sleeve 3-2 and the female head connector 3-3 can be integrated in a glue casting mode.
In the use process of the high-voltage coaxial cable connector, a cable female head 3 is arranged on a cable male head 2 through a female head flange 3-1, is connected with a high-voltage point in a cable through a female head connector 3-3, and is insulated from the female head flange 3-1 and the female head connector 3-3 through an insulating sleeve 3-2. The outer wall diameter D6 of the insulating sleeve 3-2, the inner wall diameter D7, the outer wall length L1, the inner wall length L2, the outer wall length L1 of the insulating sleeve 3-2 and the inner wall length L2 are respectively determined by dielectric strength E1 and E2 of media contacted with the outer wall and the inner wall, the length of the insulating sleeve 3-2 can be generally estimated approximately by a formula L-a U/E, wherein U is the voltage borne by the cable, E is the dielectric strength of the media, a is an empirical coefficient and depends on the ambient temperature, humidity and the surface roughness of the media, and the value of a is preferably determined to ensure that surface flashover does not occur and is generally between 1 and 4.
The high-voltage connection between the cable male head 2 and the cable female head 3 is completed by the contact between the inner conductor connector 2-3 and the female connector 3-3, and the auxiliary positioning during the contact is realized by the protrusion on the right end face of the inner conductor connector 2-3 and the groove on the left end face of the female connector 3-3. The outer diameter of the inner conductor connector 2-3 is the same as the outer diameter D3 of the outer insulator 1-3 of the high-voltage coaxial cable, the inner diameter is slightly larger than the outer diameter D2 of the inner conductor 1-2 of the cable, the length L3 is, a cylindrical structure is adopted, the inner conductor connector is sleeved on the outer side of the inner conductor 1-2 of the high-voltage coaxial cable, and electric connection is further achieved through welding.
The ground potential connection between the male cable head 2 and the female cable head 3 is completed by the contact between the outer conductor connector 2-2 and the female flange 3-1 and the compression connection through the male nut 2-1. The outer conductor connector 2-2 is a ring structure, the inner diameter of which is slightly larger than the outer diameter D4 of the outer conductor 1-4 of the cable, and the two are electrically connected through welding. The male screw cap 2-1 is of an annular structure, the inner diameter of the male screw cap is slightly larger than the diameter D5 of the insulating sheath 1-5, the male screw cap is connected with the female screw flange 3-1 through threads, and the length of the threads is suitable for adjusting the compression strength.
When the inner diameter of the cable female head 3 is close to the radius of the cable 1, the cable joint has a good installation effect; however, in the structure, the contact surfaces of the male connector and the female connector of the cable are all in hard connection, if the situation of different axes occurs, the unreliable connection phenomenon is easy to occur, only a certain local point is in contact, and when a large current passes through, ignition is easy to occur, so that the subsequent pulse transmission is influenced.
The high-voltage coaxial cable connector is long in axial length, low in insulating strength and poor in sealing effect under the oil immersion condition, transformer oil risks leakage from an interface gap, cables of various specifications can be connected to the same cable female connector in actual use, particularly when the radius of the cable is small, the cable is easy to bend and difficult to achieve accurate connection, and the risk of sparking exists.
In order to solve the problem of unstable contact, the conventional patent (for example, chinese patent with application number 201811564083.1, "a high-voltage coaxial cable connector") has improved the connection effect of the high-voltage coaxial cable connector as a whole by introducing a spring and other components, but still does not have sealing capability, and the high-voltage coaxial cable connector cannot work under the oil immersion condition. At present, cable joints above one hundred kV are generally immersed in oil, so that a high-voltage coaxial cable joint with a good sealing effect and a high insulation grade is urgently needed to be provided, and the high-voltage coaxial cable joint is suitable for the use scene of immersion of oil above one hundred kV.
Disclosure of Invention
The invention aims to solve the technical problem of providing a high-voltage coaxial cable connector with good sealing effect and high insulation grade aiming at the oil immersion condition.
According to the technical scheme, the hollow rubber round table is additionally arranged between the female flange of the female cable head and the outer insulator of the cable, the rubber fixing piece is additionally arranged between the male flange and the female flange, and the hollow rubber round table is extruded by the rubber fixing piece to deform so as to fill a joint gap, so that the sealing effect is realized.
The central axis of the cable is defined as a rotational symmetry axis OO ', one side close to the rotational symmetry axis OO ' is defined as an inner side, one side far away from the rotational symmetry axis OO ' is defined as an outer side, one end of the high-voltage coaxial cable connector connected with the external pulse forming unit is defined as a left end, and one end far away from the pulse forming unit is defined as a right end.
The invention relates to an oil-immersed high-voltage coaxial cable joint which comprises a cable male head, a cable female head and an oil injection cylinder. The cable male head is connected with the oil injection cylinder through two bolts to form a cavity which is called as the cavity of the oil injection cylinder; the cable female head is positioned on the right side of the cable male head and is in contact connection with the cable male head, and the cable female head is positioned in the cavity of the oil injection cylinder; the high-voltage coaxial cable sequentially penetrates through the cable male head and the cable female head and is inserted into the cavity of the oil injection cylinder.
The cable male head consists of a male head flange, an outer conductor connector, an inner conductor connector and a rubber fixing piece. The male flange is connected with the rubber fixing piece through two bolts, and the outer conductor connecting body is fixed between the male flange and the rubber fixing piece through extrusion; the left end face of the outer conductor connecting body is contacted with the male flange, and the right end face of the outer conductor connecting body is contacted with the rubber fixing piece; the inner conductor connector is positioned in the cavity of the oil filling cylinder, is not contacted with other parts of the cable male head, and is coaxially sleeved on the outer side of the high-voltage coaxial cable.
The male flange of the cable male is of an annular structure, is sleeved outside the high-voltage coaxial cable and is fixed on the outer side wall of the insulating sheath of the high-voltage coaxial cable in a glue casting mode. The male flange is different in size from left to right and is respectively a first circular ring, a second circular ring and a third circular ring. The inner diameter D8 of the first circular ring is D5+1mm, D5 is the outer diameter of the insulating sheath of the high-voltage coaxial cable, and the thickness L8 meets the requirement that the thickness L8 is 4mm < L8<7 mm. And the cable insulating sheath positioned in the high-voltage coaxial cable connector is completely stripped from the right end face of the first circular ring to the right. The inner diameter D9 of the second ring is D8+10mm, and the thickness L9 of the second ring is L8; the outer diameters of the first circular ring and the second circular ring are D27, and D27 is D8+25 mm; two round holes with internal threads are formed in the right end face of the second circular ring, and the two round holes are symmetrical to the central shaft OO' and used for fixing the rubber fixing piece on the right side of the male flange through bolts. The inner diameter D10 of the third ring is D9+10mm, and the thickness L10 of the third ring is L8/2; two smooth circular holes penetrating through are symmetrically formed in the third circular ring about a symmetry axis OO' and used for fixing the male flange on the left end face of the oil filling cylinder through bolts, and the outer diameter D28 of the third circular ring is D27+20 mm.
The outer conductor connector of the cable male head is of an annular structure, the inner diameter D11 is D4+0.5mm, D4 is the outer diameter of the outer conductor of the high-voltage coaxial cable, the outer diameter D12 is D9-1mm, and the thickness L11 is L9/2. The outer conductor connector is sleeved on the outer side wall of the cable outer conductor of the high-voltage coaxial cable. The cable outer conductor positioned in the high-voltage coaxial cable connector is completely stripped from the right end face of the outer conductor connector to the right, and the cable outer conductor is reserved only at the axial position of the outer conductor connector (namely the axial distance in the left end face and the right end face of the outer conductor connector), so that the outer conductor connector is welded on the outer side of the cable outer conductor, and the connection of the ground potential is realized. The outer conductor connector is coaxially nested in the second circular ring of the male flange, and the left end face of the outer conductor connector is tightly attached to the right end face of the first circular ring.
The rubber fixing part of the cable male head is of an annular structure, has different sizes from left to right, and is a fourth circular ring, a fifth circular ring and a hollow circular truncated cone respectively. The inner diameters of the fourth ring, the fifth ring and the hollow circular truncated cone are the same, and D13 is formed in each ring, and D13 is D4+1 mm. The outer diameter of the fourth ring is D14, D14 is D12, and the thickness L12 is L9-L11; the left end face of the fourth ring is in contact with the right end face of the outer conductor connector, and connection of the ground potential is achieved. The outer diameter of the fifth ring is D15, D15 is D10-1mm, and the thickness L13 is L10. The fifth ring is provided with two through holes in the same direction as the OO ', the two through holes are symmetrical to the symmetry axis OO', the positions of the two through holes correspond to the round holes in the male flange and are used for accommodating bolts to connect the rubber fixing piece and the male flange, so that the rubber fixing piece is fixed on the right side of the second ring of the male flange through the two bolts in the fifth ring. The outer diameter D6 of the left bottom surface of the hollow round table meets the requirements that the diameter D6 is 18mm <22mm, the outer diameter D31 of the right bottom surface is D6-1mm, the thickness is L14, and the diameter 1mm < L14<3 mm. The hollow round table extrudes the hollow rubber round table rightwards, so that the hollow rubber round table generates deformation perpendicular to the symmetry axis OO' to fill a gap between the high-voltage coaxial cable and a female flange of the female cable head, and the left side of the oil injection cylinder is sealed.
The inner conductor connector of the cable male head is a cylinder, the inner diameter D16 is D2+0.5mm, D2 is the outer diameter of the cable inner conductor, the outer diameter D17 is D3, D3 is the outer diameter of the high-voltage coaxial cable outer insulator, the length is L4, and L4 meets the requirement that the length is 4mm < L4<7 mm. The right end of the high-voltage coaxial cable is positioned in the oil filling cylinder, and the outer insulator is partially stripped, so that the inner conductor connecting body can be sleeved outside the inner conductor of the cable, and the electric connection is realized in a welding mode. The stripped cable jacket length is equal to L4. The right end of the high-voltage coaxial cable is embedded into a groove in the left side of a female connector of the cable, and the high-potential connection of the high-voltage coaxial cable connector is realized through the contact of an inner conductor connector and the female connector.
The cable female head consists of a female head flange, a hollow rubber round table and a female head connector. The hollow rubber round platform material of cable female head is fluororubber, and internal diameter D18 is D3+1 mm. The outer diameter D19 of the left side end surface is equal to the outer diameter D6 of the left bottom surface of the hollow circular truncated cone of the rubber fixing piece, the outer diameter D7 of the right side end surface of the hollow circular truncated cone of the rubber fixing piece, and D7 is 0.8 times D19. The length L5 of the hollow rubber round table meets the requirement that 10mm < L5<13 mm.
The female flange is of an annular configuration. The center hole of the female flange is in a circular truncated cone shape and used for accommodating a hollow rubber circular truncated cone, the left outer diameter D20 of the center hole is D19, the right outer diameter D22 of the center hole is D7, and the length L15 of the center hole is L5. The female flange is different in size from left to right and is a sixth circular ring and a seventh circular ring respectively. The outer diameter D32 of the sixth ring is D28-10mm, the thickness L6 meets the requirement that 3mm is larger than L6 and smaller than 5mm, an annular groove is formed in the right end face, threads are carved on the inner side wall of the annular groove, and the female flange is fixed on the left side of the oil filling cylinder through the threads; the outer diameter D33 of the seventh circular ring is D32-10mm, the thickness L16 meets 7mm < L16<10mm, a baffle is arranged on the right side of the central hole, and the inner diameter D21 of the baffle is D3+0.5mm, so that the hollow rubber circular table is blocked to prevent the hollow rubber circular table from sliding out of the central hole.
The female connector is a cylindrical structure with a central axis coaxial with the OO'. The left bottom surface is dug with a groove which is used for embedding the inner conductor connector so as to realize the connection of the cable female head and the cable male head at a high potential.
The oil filling cylinder consists of an oil filling cylinder shell, an inner conductor column and an insulator, and the oil filling cylinder is filled with transformer oil. A side wall cylinder is processed on the side surface of the oil filling cylinder shell vertical to the direction of the symmetry axis OO'; the inner conductor column, the insulator and the side wall cylinder are sequentially connected in a nested manner, and every two inner conductor columns are fixed in a glue casting manner.
The oil filling cylinder shell is integrally cylindrical, the length L7 meets 70mm < L7<80mm, and the inner diameter D29 is equal to the outer diameter D33 of a seventh circular ring of the female flange. The left end face of the oil filling cylinder shell is provided with an annular bulge and two smooth round holes which penetrate through the annular bulge. The penetrating smooth round holes are symmetrical about a central shaft OO' and are used for fixing the oil injection cylinder shell on the right side of the male flange through bolts, and the positions of the penetrating smooth round holes correspond to the round holes; the side wall of the annular bulge is provided with threads, and the annular bulge is inserted into the annular groove and is in threaded connection with the annular groove, so that the female flange is fixed at the left end of the oil filling cylinder shell. An oil filling port and an oil outlet are formed in the side wall of the oil filling cylinder shell and used for replacing transformer oil; the oil filling port and the oil outlet are identical in shape and size, the radial positions are symmetrically distributed about a central shaft OO ', the radial positions are cylinders vertical to the side wall of the oil filling cylinder shell, the inner diameter D28 of each cylinder meets the condition that 4mm < D28<7mm, the height h3 of each cylinder meets the condition that 4mm < h3<7mm, threads are carved on the outer side walls of the oil filling port and the oil outlet, and the port, far away from the central shaft OO', of the oil filling port and the oil outlet is sealed by a nut with a rubber ring. The side wall of the cartridge housing is also formed with a side wall cylinder having an inner diameter D30 of 23mm < D30<27mm and a height h4 of 15mm < h4<18mm for receiving the inner conductor post and insulator. The right end of the oil filling cylinder shell is closed.
The inner conductor pillar is a conductor pillar with a square bottom surface, the side length a of the square is D30/4, and the height h1 of the inner conductor pillar is h4+ D29/2+3 mm. And the female connector is welded and fixed at one end of the inner conductor column close to the OO' shaft, so that high-potential connection is realized.
The insulator is of a cylindrical structure, the shape of the central hollow part is the same as that of the inner conductor column, and the size of the central hollow part is just enough to accommodate the inner conductor column; the outer contour of the bottom surface of the insulator is circular, the outer diameter b of the bottom surface is equal to the inner diameter D30 of the side wall cylinder, and the height h2 is h 4. The inner conductor column is inserted into the central hollow part of the insulator, the insulator is inserted into the side wall cylinder of the side wall of the oil filling cylinder shell, and the inner conductor column, the insulator and the side wall cylinder are fixed in a glue casting mode.
The oil-immersed high-voltage coaxial cable connector is made of metal except that the hollow rubber round platform is made of fluororubber, the insulator is made of insulating material (such as polyethylene material), and the rest parts are made of metal.
The invention can achieve the following technical effects:
1. according to the invention, the hollow rubber round table is extruded by the rubber fixing piece to deform and fill the gap at the cable joint, so that the oil injection cavity is sealed.
2. The invention adopts the transformer oil as the insulating medium, and has high insulating grade.
3. The invention has simple structure, easy processing and manufacture, and is suitable for batch production and commercialization.
Drawings
Fig. 1 is an axial cross-sectional view of a high voltage coaxial cable and mating connector of a typical construction described in the background of the invention;
fig. 2 is an axial cross-sectional view of the high voltage coaxial cable shown in fig. 1;
FIG. 3 is an axial cross-sectional view of the oil impregnated high voltage coaxial cable connector of the present invention;
fig. 4 is an axial cross-sectional view of the male flange 2-5 of the male cable 2 of the present invention;
fig. 5 is an axial cross-sectional view of the outer conductor connector 2-2 of the male cable end 2 of the present invention;
FIG. 6 is a cross-sectional view of the rubber mount 2-4 of the male cable 2 of the present invention;
fig. 7 is an axial cross-sectional view of the inner conductor connector 2-3 of the male cable connector 2 of the present invention;
FIG. 8 is an axial sectional view of the hollow rubber round 3-4 of the female cable connector 3 of the present invention;
fig. 9 is an axial sectional view of the female flange 3-1 of the cable female 3 of the present invention;
FIG. 10 is an axial cross-sectional view of the cartridge housing 4-1 of the cartridge 4 of the present invention;
FIG. 11 is an axial cross-sectional view of the inner conductor column 4-2 of the barrel 4 of the present invention;
FIG. 12 is a schematic view of the insulator 4-3 of the cartridge 4 of the present invention; fig. 12(a) is an axial sectional view of the insulator 4-3, and fig. 12(b) is a bottom view of the insulator 4-3;
fig. 13 is a schematic view of the male cable 2 of the present invention connected to a high voltage coaxial cable 1;
FIG. 14 is a schematic view showing the connection of the female cable head 3 and the filler neck 4 according to the present invention;
fig. 15 is a schematic view of the connection between the oil-immersed high-voltage coaxial cable connector and the high-voltage coaxial cable 1 according to the present invention.
Detailed Description
The central axis of the cable is defined as a rotational symmetry axis OO ', one side close to the rotational symmetry axis OO ' is defined as an inner side, one side far away from the rotational symmetry axis OO ' is defined as an outer side, one end of the high-voltage coaxial cable connector connected with the external pulse forming unit is defined as a left end, and one end far away from the pulse forming unit is defined as a right end.
The oil-immersed high-voltage coaxial cable connector is shown in figure 3. The cable joint comprises a cable male head 2, a cable female head 3 and an oil injection cylinder 4. The cable male head 2 is connected with the oil injection cylinder 4 through two bolts to form a cavity which is called as the cavity of the oil injection cylinder 4; the cable female head 3 is positioned on the right side of the cable male head 2 and is in contact connection with the cable male head 2, and the cable female head 3 is positioned in the cavity of the oil injection cylinder 4; the high-voltage coaxial cable 1 sequentially passes through the cable male head 2 and the cable female head 3 and is inserted into the cavity of the oil injection cylinder 4.
As shown in fig. 3, the male connector 2 of the cable is composed of a male flange 2-5, an outer conductor connector 2-2, an inner conductor connector 2-3 and a rubber fastener 2-4. The male flange 2-5 is connected with the rubber fixing piece 2-4 through two bolts, and the outer conductor connecting body 2-2 is fixed between the male flange 2-5 and the rubber fixing piece 2-4 through extrusion; the left end face of the outer conductor connector 2-2 is in contact with the male flange 2-5, and the right end face of the outer conductor connector is in contact with the rubber fixing piece 2-4; the inner conductor connector 2-3 is positioned in the cavity of the oil filling cylinder 4, is not contacted with the other 3 parts of the cable male head 2, and is coaxially sleeved on the outer side of the high-voltage coaxial cable 1.
The male flanges 2-5 of the male cable end 2 are shown in fig. 4. The male flange 2-5 is of an annular structure, is sleeved on the outer side of the high-voltage coaxial cable 1 and is fixed on the outer side wall of the insulating sheath 1-5 of the high-voltage coaxial cable 1 in a glue casting mode. The male flange 2-5 has different sizes from left to right and is respectively a first circular ring 2-5-1, a second circular ring 2-5-2 and a third circular ring 2-5-3. The inner diameter D8 of the first circular ring 2-5-1 is D5+1mm, D5 is the outer diameter of the high-voltage coaxial cable insulating sheath 1-5, and the thickness L8 meets the requirement that the thickness L8 is 4mm <7 mm. And the cable insulating sheath 1-5 positioned in the high-voltage coaxial cable connector is completely stripped from the right end face of the first circular ring 2-5-1 to the right. The inner diameter D9 of the second circular ring 2-5-2 is D8+10mm, and the thickness L9 is L8; the outer diameters of the first circular ring 2-5-1 and the second circular ring 2-5-2 are both D27, and D27 is D8+25 mm; two round holes 2-5-2-1 with internal threads are formed in the end face of the right side of the second circular ring 2-5-2, and the two round holes 2-5-2-1 are symmetrical to a central shaft OO' and used for fixing the rubber fixing piece 2-4 to the right side of the male flange 2-5 through bolts. The inner diameter D10 of the third ring 2-5-3 is D9+10mm, and the thickness L10 is L8/2; two smooth circular holes 2-5-3-1 penetrating through the third circular ring 2-5-3 are symmetrically formed on the third circular ring about a symmetry axis OO' and used for fixing the male flange 2-5 on the left end face of the oil injection cylinder 4 through bolts, and the outer diameter D28 of the third circular ring 2-5-3 is D27+20 mm.
The outer conductor connection body 2-2 of the male cable end 2 is shown in fig. 5. The outer conductor connector 2-2 is of an annular structure, the inner diameter D11 is D4+0.5mm, D4 is the outer diameter of the cable outer conductor 1-4 of the high-voltage coaxial cable 1, the outer diameter D12 is D9-1mm, and the thickness L11 is L9/2. The outer conductor connector 2-2 is sleeved on the outer side wall of the cable outer conductor 1-4 of the high-voltage coaxial cable 1. The cable outer conductor 1-4 positioned in the high-voltage coaxial cable connector is completely stripped from the right end face of the outer conductor connector 2-2 to the right, and the cable outer conductor 1-4 is reserved only at the axial position of the outer conductor connector 2-2 (namely the axial distance in the left end face and the right end face of the outer conductor connector 2-2), so that the outer conductor connector 2-2 is welded on the outer side of the cable outer conductor 1-4, and the connection of the ground potential is realized. The outer conductor connector 2-2 is coaxially nested in the second circular ring 2-5-2 of the male flange 2-5, and the left end face of the outer conductor connector 2-2 is tightly attached to the right end face of the first circular ring 2-5-1.
The rubber mounts 2-4 of the male cable end 2 are shown in figure 6. The rubber fixing piece 2-4 is of an annular structure, has different sizes from left to right and is respectively a fourth circular ring 2-4-1, a fifth circular ring 2-4-2 and a hollow circular truncated cone 2-4-3. The inner diameters of the fourth ring 2-4-1, the fifth ring 2-4-2 and the hollow circular truncated cone 2-4-3 are the same, and D13 is formed, and D13 is D4+1 mm. The outer diameter of the fourth ring 2-4-1 is D14, D14 is D12, and the thickness L12 is L9-L11; the left end face of the fourth circular ring 2-4-1 is in contact with the right end face of the outer conductor connector 2-2, and connection of ground potential is achieved. The outer diameter of the fifth ring 2-4-2 is D15, D15 is D10-1mm, and the thickness L13 is L10. The fifth ring 2-4-2 is provided with two through holes 2-4-2-1 which are in the same direction as the OO ', the two through holes 2-4-2-1 are symmetrical to the symmetry axis OO', the positions of the two through holes 2-4-2-1 correspond to the round holes 2-5-2-1 in the male flange 2-5 and are used for accommodating bolts to connect the rubber fixing piece 2-4 with the male flange 2-5, and the rubber fixing piece 2-4 is fixed on the right side of the second ring 2-5-2 of the male flange 2-5 through the two bolts in the fifth ring 2-4-2. The outer diameter D6 of the left bottom surface of the hollow round table 2-4-3 meets the requirements that the diameter is 18mm < D6<22mm, the outer diameter D31 of the right bottom surface is D6-1mm, the thickness is L14, and the diameter is 1mm < L14<3 mm. The hollow round tables 2-4-3 extrude the hollow rubber round tables 3-4 rightwards, so that the hollow rubber round tables 3-4 generate deformation vertical to the symmetry axis OO' to fill a gap between the high-voltage coaxial cable 1 and the female flange 3-1 of the cable female head 3, and the sealing effect on the left side of the oil injection cylinder 4 is realized.
As shown in fig. 7, the inner conductor connector 2-3 of the male cable end 2 is a cylinder, the inner diameter D16 is D2+0.5mm, D2 is the outer diameter of the inner conductor 1-2 of the cable, the outer diameter D17 is D3, D3 is the outer diameter of the outer insulator 1-3 of the high-voltage coaxial cable 1, the length is L4, and L4 satisfies 4mm < L4<7 mm. The right end of the high-voltage coaxial cable 1 is positioned at the outer insulator 1-3 in the oil filling cylinder 4, a part of the outer insulator is stripped off, so that the inner conductor connector 2-3 can be sleeved at the outer side of the inner conductor 1-2 of the cable, and the electrical connection is realized in a welding mode. The stripped cable insulation 1-3 has a length equal to L4. The right end of the high-voltage coaxial cable 1 is embedded into a groove on the left side of a female connector 3-3 of a female cable connector 3, and high-potential connection of a high-voltage coaxial cable connector is realized by the contact of an inner conductor connector 2-3 and the female connector 3-3.
As shown in figure 3, the cable female head 3 consists of a female head flange 3-1, a hollow rubber circular truncated cone 3-4 and a female head connector 3-3. As shown in fig. 8, the hollow rubber circular truncated cone 3-4 of the female cable connector 3 is made of fluororubber, and the inner diameter D18 is D3+1 mm. The outer diameter D19 of the left side end surface is equal to the outer diameter D6 of the left side bottom surface of the hollow round table 2-4-3 of the rubber fixing piece, the outer diameter of the right side end surface of the hollow round table 3-4 of the rubber fixing piece is D7, and D7 is 0.8 times D19. The length L5 of the hollow rubber round tables 3-4 meets the requirement that the length is 10mm < L5<13 mm.
The female flange 3-1 is shown in fig. 9 as being of an annular configuration. The center hole 3-1-3 of the female flange 3-1 is of a circular truncated cone shape and is used for accommodating the hollow rubber circular truncated cone 3-4, the left outer diameter D20 of the center hole is D19, the right outer diameter D22 is D7, and the length L15 is L5. The female flange 3-1 is different in size from left to right and is respectively a sixth ring 3-1-1 and a seventh ring 3-1-2. The outer diameter D32 of the sixth ring 3-1-1 is D28-10mm, the thickness L6 meets the requirement that 3mm is less than L6 and less than 5mm, the right end face of the sixth ring is provided with an annular groove 3-1-1-1, the inner side wall of the annular groove 3-1-1-1 is carved with threads, and the female flange 3-1 is fixed on the left side of the oil injection cylinder 4 through threads; the outer diameter D33 of the seventh circular ring 3-1-2 is D32-10mm, the thickness L16 meets 7mm < L16<10mm, the right side of the center hole is provided with a baffle 3-1-2-1, the inner diameter D21 of the baffle 3-1-2-1 is D3+0.5mm, and the baffle is used for blocking the hollow rubber circular table 3-4 to prevent the hollow rubber circular table from sliding out of the center hole 3-1-3.
As shown in fig. 3, the female connector 3-3 has a cylindrical structure with a central axis coaxial with OO'. A groove is dug in the left bottom surface and is used for embedding the inner conductor connector 2-3 so as to realize the high-potential connection between the cable female head 3 and the cable male head 2.
As shown in figure 3, the oil filling cylinder 4 consists of an oil filling cylinder shell 4-1, an inner conductor column 4-2 and an insulator 4-3, and transformer oil is filled in the oil filling cylinder 4. The oil filling cylinder shell 4-1 is as shown in figure 10, and a side wall cylinder 4-1-5 is processed on the side surface of the oil filling cylinder shell 4-1 and is vertical to the direction of a symmetry axis OO'; the inner conductor column 4-2, the insulator 4-3 and the side wall cylinder 4-1-5 are sequentially connected in a nested manner, and every two inner conductor columns are fixed in a glue casting manner.
The oil filling cylinder shell 4-1 is integrally cylindrical, the length L7 is more than 70mm and less than L7 and less than 80mm, and the inner diameter D29 is equal to the outer diameter D33 of the seventh circular ring 3-1-2 of the female flange 3-1. The left end face of the oil filling cylinder shell 4-1 is provided with an annular bulge 4-1-1 and two smooth round holes 4-1-2. The through smooth round hole 4-1-2 is symmetrical about a central axis OO' and is used for fixing the oil filling cylinder shell 4-1 on the right side of the male flange 2-5 through a bolt, and the position of the through smooth round hole corresponds to that of the round hole 2-5-3-1; the side wall of the annular bulge 4-1-1 is provided with a thread, the annular bulge 4-1-1 is inserted into the annular groove 3-1-1-1 and is connected with the annular groove 3-1-1-1 through the thread, and therefore the female flange 3-1 is fixed at the left end of the oil filling cylinder shell 4-1. An oil filling port 4-1-3 and an oil outlet 4-1-4 are processed on the side wall of the oil filling cylinder shell 4-1 and used for replacing transformer oil; the oil filling port 4-1-3 and the oil outlet 4-1-4 are identical in shape and size, radial positions are symmetrically distributed about a central shaft OO ', the radial positions are cylinders perpendicular to the side wall of the oil filling cylinder shell 4-1, the inner diameter D28 of each cylinder meets the requirement that 4mm is smaller than D28 and smaller than 7mm, the height h3 of each cylinder meets the requirement that 4mm is smaller than h3 and smaller than 7mm, threads are respectively engraved on the outer side walls of the oil filling port 4-1-3 and the oil outlet 4-1-4, and ports, far away from the central shaft OO', of the oil filling port 4-1-3 and the oil outlet 4-1-4 are sealed by nuts with rubber rings. The side wall of the filler neck housing 4-1 is further formed with a side wall cylinder 4-1-5 having an inner diameter D30 of 23mm < D30<27mm and a height h4 of 15mm < h4<18mm for accommodating the inner conductor post 4-2 and the insulator 4-3. The right end of the oil filling cylinder shell 4-1 is closed.
As shown in fig. 11, the inner conductor pillar 4-2 is a conductor pillar having a square bottom surface, the side length a of the square is D30/4, and the height h1 of the inner conductor pillar 4-2 is h4+ D29/2+3 mm. As shown in fig. 3, the female connector 3-3 is welded and fixed to one end of the inner conductor post 4-2 near the OO' axis, thereby realizing high-potential connection.
The insulator 4-3 is shown in fig. 12, fig. 12(a) is an axial sectional view of the insulator 4-3, and fig. 12(b) is a bottom view of the insulator 4-3. The insulator 4-3 is of a cylindrical structure, the shape of a central hollow part 4-3-1 is the same as that of the inner conductor column 4-2, and the size of the central hollow part is enough to just accommodate the inner conductor column 4-2; the outer contour of the bottom surface of the insulator 4-3 is circular, the outer diameter b of the bottom surface is equal to the inner diameter D30 of the side wall cylinder 4-1-5, and the height h2 is h 4. The inner conductor column 4-2 is inserted into the central hollow part 4-3-1 of the insulator 4-3, the insulator 4-3 is inserted into the side wall cylinder 4-1-5 on the side wall of the oil filling cylinder shell 4-1, and the inner conductor column 4-2, the insulator 4-3 and the side wall cylinder 4-1-5 are fixed in a glue casting mode.
Except that the hollow rubber round table 3-4 is made of fluororubber, the insulator 4-3 is made of insulating material (such as polyethylene material), the oil-immersed high-voltage coaxial cable connector is made of metal.
Fig. 13 is a schematic view of the connection between the male cable 2 and the high-voltage coaxial cable 1 according to the present invention. The male flange 2-5 is sleeved on the outer side wall of the high-voltage coaxial cable 1 and is fixed on the outer side wall of the insulating sheath 1-5 in a glue casting mode; the inner insulating sheath 1-5 and the outer conductor 1-4 of the connector are all stripped rightwards from the right end face of the outer conductor connecting body 2-2, the outer conductor 1-4 is only reserved at the position wrapped by the outer conductor connecting body 2-2 and is not stripped, the outer conductor connecting body 2-2 is sleeved outside the outer conductor 1-4 and is fixed on the outer side wall of the outer conductor 1-4 in a welding mode; the rubber fixing piece 2-4 is sleeved outside the outer insulator 1-3 of the high-voltage coaxial cable 1 after the insulating sheath 1-5 and the outer conductor 1-4 are stripped off, and is fixed on the right side of the male flange 2-5 through two bolts, and the left side of the rubber fixing piece 2-4 is in contact with the outer conductor connector 2-2; a part of an outer insulator 1-3 at the right end of the high-voltage coaxial cable 1 in a cavity of the oil filling cylinder 4-1 is stripped off, so that the length of a cable inner conductor 1-2 exposed at the right end of the high-voltage coaxial cable 1 is equal to the length L4 of an inner conductor connector 2-3, and the inner conductor connector 2-3 is sleeved outside the exposed part of the cable inner conductor 1-2 in a welding mode.
Fig. 14 is a schematic view showing the connection of the female cable head 3 and the filler neck 4 according to the present invention. The female connector 3-3 is welded at one end of the inner conductor column 4-2 close to the OO' shaft; the female flange 3-1 is fixed at the left end of the oil injection cylinder shell 4-1 through threads, and the hollow rubber circular truncated cone 3-4 is arranged in the groove 3-1-3 of the female flange 3-1.
Fig. 15 is a schematic view of the connection between the oil-immersed high-voltage coaxial cable connector and the high-voltage coaxial cable 1 according to the present invention. The right side of the male flange 2-5 is in contact with the left side of the oil injection cylinder shell 4-1, and meanwhile, the right side of the high-voltage coaxial cable 1 is ensured to be embedded into a left groove of the female connector 3-3; two bolts are used for fixing the male flange 2-5 and the oil injection cylinder shell 4-1 through the through round hole 2-4-2-1 and the through round hole 4-1-2, the tightness degree of the bolts is adjusted to enable the rubber fixing piece 2-4 to extrude the hollow rubber circular truncated cone 3-4, and the hollow rubber circular truncated cone 3-4 generates deformation to fill a gap between the high-voltage coaxial cable 1 and the female flange 3-1, so that the sealing effect on the oil injection cylinder 4 is realized; sealing the oil outlet 4-1-4, injecting transformer oil through the oil injection port 4-1-3, and finally sealing the oil injection port 4-1-3. The inner conductor column 4-2, the female connector 3-3, the inner conductor connector 2-2 and the part of the high-voltage coaxial cable 1, which is positioned in the oil filling cylinder shell 4-1, are soaked in transformer oil, and the transformer oil can insulate the above components. The female flange 3-1 is contacted with the transformer oil on the right side of the hollow rubber round table 3-4, and the transformer oil is prevented from leaking from the left side of the oil injection cylinder shell 4-1.
Claims (12)
1. An oil-immersed high-voltage coaxial cable connector comprises a male cable head (2) and a female cable head (3), wherein the male cable head (2) comprises an outer conductor connector (2-2) and an inner conductor connector (2-3), the outer conductor connector (2-2) is of an annular structure, and the inner conductor connector (2-3) is a cylinder; the cable female head (3) comprises a female head flange (3-1) and a female head connector (3-3), the female head flange (3-1) is of an annular structure, the female head connector (3-3) is of a cylindrical structure, and the high-voltage connection between the cable female head (3) and the cable male head (2) is realized by contacting with the inner conductor connector (2-3); the rotational symmetry axis OO ' of the high-voltage coaxial cable connector is a central axis of the high-voltage coaxial cable (1), one side close to the rotational symmetry axis OO ' is an inner side, one side far away from the rotational symmetry axis OO ' is an outer side, the left end of the high-voltage coaxial cable connector refers to one end connected with the pulse forming unit, and the right end of the high-voltage coaxial cable connector refers to one end far away from the pulse forming unit; the method is characterized in that:
the oil-immersed high-pressure coaxial cable joint also comprises an oil injection cylinder (4), wherein the cable male head (2) is connected with the oil injection cylinder (4) through two bolts to form a cavity which is called as the cavity of the oil injection cylinder (4); the cable female head (3) is positioned on the right side of the cable male head (2) and is in contact connection with the cable male head, and the cable female head (3) is positioned in the cavity of the oil injection cylinder (4); the high-voltage coaxial cable (1) sequentially penetrates through the cable male head (2) and the cable female head (3) and is inserted into the cavity of the oil injection cylinder (4);
the cable male head (2) further comprises a male head flange (2-5) and a rubber fixing piece (2-4), the male head flange (2-5) is connected with the rubber fixing piece (2-4) through two bolts, and the outer conductor connecting body (2-2) is fixed between the male head flange (2-5) and the rubber fixing piece (2-4) through extrusion; the left end face of the outer conductor connector (2-2) is contacted with the male flange (2-5), and the right end face is contacted with the rubber fixing piece (2-4); the inner conductor connector (2-3) is positioned in the cavity of the oil injection cylinder (4), is not contacted with the other 3 parts of the cable male head (2), and is coaxially sleeved on the outer side of the high-voltage coaxial cable (1);
the male flange (2-5) of the cable male (2) is of an annular structure, is sleeved outside the high-voltage coaxial cable (1), and is fixed on the outer side wall of the insulating sheath (1-5) of the high-voltage coaxial cable (1) in a glue casting mode; the male flange (2-5) has different sizes from left to right and is respectively a first circular ring (2-5-1), a second circular ring (2-5-2) and a third circular ring (2-5-3); the inner diameter of the first circular ring (2-5-1) is D8, and the thickness is L8; the cable insulation sheath (1-5) positioned in the high-voltage coaxial cable connector is completely stripped rightwards from the right end face of the first circular ring (2-5-1); the inner diameter of the second circular ring (2-5-2) is D9, and the thickness is L9; the outer diameters of the first circular ring (2-5-1) and the second circular ring (2-5-2) are both D27; two round holes (2-5-2-1) with internal threads are formed in the end face of the right side of the second circular ring (2-5-2), and the two round holes (2-5-2-1) are symmetrical to a central shaft OO' and used for fixing the rubber fixing piece (2-4) to the right side of the male flange (2-5) by using bolts; the inner diameter of the third ring (2-5-3) is D10, and the thickness is L10; two smooth circular holes (2-5-3-1) are symmetrically formed in the third circular ring (2-5-3) around a symmetry axis OO', and are used for fixing the male flange (2-5) on the left end face of the oil injection cylinder (4) through bolts;
the inner diameter of an outer conductor connector (2-2) of the cable male head (2) is D11, the outer diameter is D12, and the thickness is L11; an outer conductor connector (2-2) of the cable male head (2) is sleeved on the outer side wall of a cable outer conductor (1-4) of the high-voltage coaxial cable (1); the cable outer conductor (1-4) positioned in the high-voltage coaxial cable connector is completely stripped from the right end face of the outer conductor connecting body (2-2) to the right, and the cable outer conductor (1-4) is reserved only in the axial distance between the left end face and the right end face of the outer conductor connecting body (2-2), so that the outer conductor connecting body (2-2) is welded on the outer side of the cable outer conductor (1-4) to realize ground potential connection; the outer conductor connector (2-2) is coaxially nested in a second circular ring (2-5-2) of the male flange (2-5), and the left end face of the outer conductor connector (2-2) is tightly attached to the right end face of the first circular ring (2-5-1);
the rubber fixing piece (2-4) of the cable male head (2) is of an annular structure, the sizes of the rubber fixing piece are different from left to right, and the rubber fixing piece is respectively provided with a fourth circular ring (2-4-1), a fifth circular ring (2-4-2) and a hollow circular truncated cone (2-4-3); the inner diameters of the fourth circular ring (2-4-1), the fifth circular ring (2-4-2) and the hollow circular truncated cone (2-4-3) are the same and are D13; the outer diameter of the fourth ring (2-4-1) is D14, and the thickness is L12; the left end face of the fourth circular ring (2-4-1) is in contact with the right end face of the outer conductor connector (2-2) to realize the connection of the ground potential; the outer diameter of the fifth ring (2-4-2) is D15, and the thickness is L13; the fifth circular ring (2-4-2) is provided with two through holes (2-4-2-1) which are in the same direction as the OO ', the two through holes (2-4-2-1) are symmetrical to the symmetry axis OO', the positions of the two through holes (2-4-2-1) correspond to the round holes (2-5-2-1) in the male flange (2-5) and are used for accommodating bolts to connect the rubber fixing piece (2-4) with the male flange (2-5), so that the rubber fixing piece (2-4) is fixed on the right side of the second circular ring (2-5-2) of the male flange (2-5) through the two bolts in the fifth circular ring (2-4-2); the outer diameter of the bottom surface of the left side of the hollow round table (2-4-3) is D6, the outer diameter of the bottom surface of the right side is D31, and the thickness is L14; the hollow round tables (2-4-3) extrude the hollow rubber round tables (3-4) rightwards, so that the hollow rubber round tables (3-4) generate deformation vertical to the symmetry axis OO' to fill a gap between the high-voltage coaxial cable (1) and the female flange (3-1) of the cable female head (3), and the left side of the oil injection cylinder (4) is sealed;
the inner diameter of an inner conductor connector (2-3) of the cable male head (2) is D16, the outer diameter is D17, and the length is L4; stripping a part of an outer insulator (1-3) at the right end of the high-voltage coaxial cable (1) in the oil injection cylinder (4) to enable an inner conductor connector (2-3) to be sleeved on the outer side of an inner conductor (1-2) of the cable and realize electric connection in a welding mode; the stripped cable insulation (1-3) has a length equal to L4; the right end of the high-voltage coaxial cable (1) is embedded into a groove on the left side of a female connector (3-3) of a female cable connector (3), and high-potential connection of a high-voltage coaxial cable connector is realized by the contact of an inner conductor connector (2-3) and the female connector (3-3);
the cable female head (3) also comprises a hollow rubber round table (3-4), the inner diameter of the hollow rubber round table (3-4) is D18, the outer diameter of the left end face is D19, and the outer diameter of the right end face is D7; the length of the hollow rubber round table (3-4) is L5;
the center hole (3-1-3) of the female flange (3-1) is of a circular truncated cone shape and is used for accommodating a hollow rubber circular truncated cone (3-4), the outer diameter of the left side of the center hole is D20, the outer diameter of the right side of the center hole is D22, and the length of the center hole is L15; the female head flanges (3-1) are different in size from left to right and are respectively a sixth circular ring (3-1-1) and a seventh circular ring (3-1-2); the outer diameter of the sixth ring (3-1-1) is D32, the thickness is L6, the right end face of the sixth ring is provided with an annular groove (3-1-1-1), the inner side wall of the annular groove (3-1-1-1) is carved with threads, and the female flange (3-1) is fixed on the left side of the oil filling cylinder (4) through the threads; the outer diameter of the seventh circular ring (3-1-2) is D33, the thickness of the seventh circular ring is L16, a baffle (3-1-2-1) is arranged on the right side of the central hole and used for blocking the hollow rubber circular table (3-4) to prevent the hollow rubber circular table from sliding out of the central hole (3-1-3);
the central shaft of the female connector (3-3) is coaxial with OO', a groove is dug in the left bottom surface, and the groove is used for embedding the inner conductor connector (2-3);
the oil injection cylinder (4) consists of an oil injection cylinder shell (4-1), an inner conductor column (4-2) and an insulator (4-3), and transformer oil is filled in the oil injection cylinder (4); a side wall cylinder (4-1-5) is processed on the side surface of the oil filling cylinder shell (4-1) in the direction vertical to the symmetry axis OO'; the inner conductor column (4-2), the insulator (4-3) and the side wall cylinder (4-1-5) are sequentially connected in a nested manner, and every two inner conductor columns are fixed in a glue casting manner;
the oil filling cylinder shell (4-1) is integrally cylindrical, the length is L7, and the inner diameter is D29; the left end face of the oil filling cylinder shell (4-1) is provided with an annular bulge (4-1-1) and two smooth circular holes (4-1-2) which penetrate through; the penetrating smooth round hole (4-1-2) is symmetrical about a central shaft OO', and is used for fixing the oil filling cylinder shell (4-1) on the right side of the male flange (2-5) through a bolt, and the position of the penetrating smooth round hole corresponds to that of the round hole (2-5-3-1); threads are carved on the side wall of the annular bulge (4-1-1), the annular bulge (4-1-1) is inserted into the annular groove (3-1-1-1) and is connected with the annular groove (3-1-1-1) through the threads, and therefore the female flange (3-1) is fixed at the left end of the oil filling cylinder shell (4-1); an oil filling port (4-1-3) and an oil outlet (4-1-4) are processed on the side wall of the oil filling cylinder shell (4-1) and used for replacing transformer oil; the oil filling port (4-1-3) and the oil outlet (4-1-4) are identical in shape and size, the radial positions are symmetrically distributed about a central shaft OO ', the radial positions are cylinders vertical to the side wall of the oil filling cylinder shell (4-1), threads are carved on the outer side walls of the oil filling port (4-1-3) and the oil outlet (4-1-4), and ports, far away from the central shaft OO', of the oil filling port (4-1-3) and the oil outlet (4-1-4) are sealed by nuts with rubber rings; the side wall of the oil filling cylinder shell (4-1) is also provided with a side wall cylinder (4-1-5), the inner diameter of the side wall cylinder (4-1-5) is D30, the height is h4, and the side wall cylinder is used for accommodating the inner conductor column (4-2) and the insulator (4-3); the right end of the oil filling cylinder shell (4-1) is closed;
the inner conductor column (4-2) is a conductor column with a square bottom surface, and the female connector (3-3) is welded and fixed at one end of the inner conductor column (4-2) close to the OO' shaft to realize high-potential connection;
the insulator (4-3) is of a cylindrical structure, the shape of the central hollow part (4-3-1) is the same as that of the inner conductor column (4-2), and the size of the central hollow part is enough to just accommodate the inner conductor column (4-2); the outline of the bottom surface of the insulator (4-3) is circular, the inner conductor column (4-2) is inserted into the central hollow part (4-3-1) of the insulator (4-3), the insulator (4-3) is inserted into the side wall cylinder (4-1-5) of the side wall of the oil filling cylinder shell (4-1), and the inner conductor column (4-2), the insulator (4-3) and the side wall cylinder (4-1-5) are fixed in a glue casting mode.
2. An oil-impregnated high-voltage coaxial cable joint as claimed in claim 1, wherein the inner diameter D8 of the first ring (2-5-1) of the male cable end (2) is D5+1mm, D5 is the outer diameter of the insulating sheath (1-5) of the high-voltage coaxial cable, and the thickness L8 satisfies 4mm < L8<7 mm; the inner diameter D9 of the second ring (2-5-2) is D8+10mm, and the thickness L9 is L8; the outer diameters of the first circular ring (2-5-1) and the second circular ring (2-5-2) are both D27, and D27 is D8+25 mm; the inner diameter D10 of the third ring (2-5-3) is D9+10mm, and the thickness L10 is L8/2; the outer diameter D28 of the third ring (2-5-3) is D27+20 mm.
3. The oil-immersed high-voltage coaxial cable joint as claimed in claim 1, wherein the inner diameter D11-D4 +0.5mm of the outer conductor connector (2-2) of the cable male (2) is D12-1 mm, D4 is the outer diameter of the cable outer conductor (1-4) of the high-voltage coaxial cable (1), and the outer diameter D12-D9-1 mm and the thickness L11-L9/2.
4. The oil-impregnated high-voltage coaxial cable connector as claimed in claim 1, wherein the inner diameters D13 ═ D4+1mm of the fourth ring (2-4-1) of the rubber fixing member (2-4) of the cable male (2), the fifth ring (2-4-2) and the hollow truncated cone (2-4-3), and D4 is the outer diameter of the cable outer conductor (1-4) of the high-voltage coaxial cable (1); the outer diameter D14 of the fourth ring (2-4-1) is D12, and the thickness L12 is L9-L11; the outer diameter D15 of the fifth ring (2-4-2) is D10-1mm, and the thickness L13 is L10; the outer diameter D6 of the left bottom surface of the hollow round table (2-4-3) meets 18mm < D6<22mm, the outer diameter D31 of the right bottom surface meets D6-1mm, and the thickness L14 meets 1mm < L14<3 mm.
5. An oil-immersed high-voltage coaxial cable joint as claimed in claim 1, wherein the inner diameter D16 ═ D2+0.5mm of the inner conductor connector (2-3) of the male cable head (2), D2 is the outer diameter of the inner conductor (1-2) of the cable, D17 ═ D3, D3 is the outer diameter of the outer insulator (1-3) of the high-voltage coaxial cable (1), and the length L4 satisfies 4mm < L4<7 mm.
6. The oil-impregnated high-voltage coaxial cable connector as claimed in claim 1, wherein the inner diameter D18 of the hollow rubber round table (3-4) of the cable female head (3) is D3+1mm, and D3 is the outer diameter of the outer insulator (1-3) of the high-voltage coaxial cable (1); the outer diameter D19 of the left side end face is equal to the outer diameter D6 of the left bottom face of the hollow round table (2-4-3) of the rubber fixing piece, and the outer diameter D7 of the right side end face of the hollow round table (3-4) is 0.8 × D19; the length L5 of the hollow rubber round table (3-4) meets the requirement that the length L5 is less than 13 mm.
7. The oil-impregnated high-pressure coaxial cable joint as claimed in claim 1, wherein the central hole (3-1-3) of the female flange (3-1) of the female cable (3) has a left outer diameter D20 ═ D19, a right outer diameter D22 ═ D7, a length L15 ═ L5; the outer diameter D32 of a sixth ring (3-1-1) of the female flange (3-1) is equal to D28-10mm, the thickness L6 meets the requirement that 3mm is smaller than L6 and smaller than 5mm, the outer diameter D33 of a seventh ring (3-1-2) is equal to D32-10mm, the thickness L16 meets the requirement that 7mm is smaller than L16 and smaller than 10mm, the inner diameter D21 of the baffle (3-1-2-1) is equal to D3+0.5mm, and D3 is the outer diameter of an outer insulator (1-3) of the high-voltage coaxial cable (1).
8. The oil-impregnated high-pressure coaxial cable joint according to claim 1, wherein the length L7 of the oil filler sleeve housing (4-1) satisfies 70mm < L7<80mm, and the inner diameter D29 is D33; the internal diameters D28 of the oil filling port (4-1-3) and the oil outlet (4-1-4) meet 4mm < D28<7mm, and the height h3 of the oil filling port (4-1-3) and the oil outlet (4-1-4) meets 4mm < h3<7 mm; side wall cylinders (4-1-5) with an internal diameter D30 of 23mm < D30<27mm and a height h4 of 15mm < h4<18 mm.
9. An oil-impregnated high-voltage coaxial cable connector as claimed in claim 1, wherein the square side length a of the inner conductor column (4-2) is D30/4, and the height h1 of the inner conductor column (4-2) is h4+ D29/2+3 mm.
10. An oil-impregnated high-voltage coaxial cable connector as claimed in claim 1, wherein the insulator (4-3) has a bottom outer diameter b of D30 and a height h2 of h 4.
11. The oil-impregnated high-voltage coaxial cable connector as claimed in claim 1, wherein the hollow rubber round platforms (3-4) are made of fluororubber, the insulators (4-3) are made of insulating materials, and the rest of the components are made of metal.
12. An oil-impregnated high-voltage coaxial cable connector as claimed in claim 11, wherein the insulator (4-3) is made of polyethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010327848.0A CN111490418B (en) | 2020-04-23 | 2020-04-23 | Oil-immersed high-voltage coaxial cable connector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010327848.0A CN111490418B (en) | 2020-04-23 | 2020-04-23 | Oil-immersed high-voltage coaxial cable connector |
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| Publication Number | Publication Date |
|---|---|
| CN111490418A CN111490418A (en) | 2020-08-04 |
| CN111490418B true CN111490418B (en) | 2021-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010327848.0A Active CN111490418B (en) | 2020-04-23 | 2020-04-23 | Oil-immersed high-voltage coaxial cable connector |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2817073Y (en) * | 2005-06-06 | 2006-09-13 | 中国科学院近代物理研究所 | High-voltage large-current coaxial structured inductance-free thyratron oil-tank |
| CN100546124C (en) * | 2007-12-07 | 2009-09-30 | 罗森伯格亚太电子有限公司 | A kind of male connector of coaxial cable connector |
| CN204632948U (en) * | 2015-05-20 | 2015-09-09 | 罗森伯格亚太电子有限公司 | The radio frequency connector of quick attaching coaxial cable |
| JP2017073220A (en) * | 2015-10-05 | 2017-04-13 | 住友電装株式会社 | connector |
| JP6513766B1 (en) * | 2017-10-25 | 2019-05-15 | 日本航空電子工業株式会社 | connector |
| CN208571087U (en) * | 2018-05-26 | 2019-03-01 | 中能绿驰成都汽车科技有限公司 | Automobile-used high-voltage electric connector |
| CN109546492B (en) * | 2018-12-20 | 2020-02-28 | 中国人民解放军国防科技大学 | High-voltage coaxial cable connector |
| CN210041297U (en) * | 2019-04-26 | 2020-02-07 | 江苏星华机场设施有限公司 | Lead pipe type cable connector |
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2020
- 2020-04-23 CN CN202010327848.0A patent/CN111490418B/en active Active
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