CN109787133B - A prefabricated distribution transformer rack - Google Patents
A prefabricated distribution transformer rack Download PDFInfo
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- CN109787133B CN109787133B CN201910186924.8A CN201910186924A CN109787133B CN 109787133 B CN109787133 B CN 109787133B CN 201910186924 A CN201910186924 A CN 201910186924A CN 109787133 B CN109787133 B CN 109787133B
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- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 116
- 238000002788 crimping Methods 0.000 claims abstract description 38
- 238000001746 injection moulding Methods 0.000 claims description 32
- 239000012212 insulator Substances 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 13
- 230000001681 protective effect Effects 0.000 claims description 7
- 239000003086 colorant Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000005389 magnetism Effects 0.000 claims 2
- 238000005253 cladding Methods 0.000 claims 1
- 230000013011 mating Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 16
- 230000008569 process Effects 0.000 abstract description 16
- 238000009413 insulation Methods 0.000 abstract description 12
- 238000010276 construction Methods 0.000 abstract description 7
- 238000009417 prefabrication Methods 0.000 abstract description 4
- 230000008602 contraction Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 230000004069 differentiation Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- Housings And Mounting Of Transformers (AREA)
- Suspension Of Electric Lines Or Cables (AREA)
Abstract
本发明涉及电力设备领域，具体是一种预装式配变台架，包括一一对应的第一段引接线、第二段引接线、第三段引接线、隔离开关、熔断器、避雷器和对应的承载横架，第一段引接线、第二段引接线、第三段引接线的连接端头为预制式连接端头。本发明预装式配变台架，配变台架的引接线连接及其配套产品采用标准化工艺预先制作完成，有效解决了不同操作人员现场施工工艺的差异化问题，实现引接线压接和绝缘处理预制化和标准化，产品的电气性能经检验符合要求后才出厂投入使用，质量有保障，有效降低故障率，且配变台架为一体化整体结构，能够采用标准化安装，快速方便，配套齐全。
The present invention relates to the field of electric power equipment, specifically a prefabricated distribution transformer rack, including a first section lead wire, a second section lead wire, a third section lead wire, an isolating switch, a fuse, a lightning arrester and a corresponding load-bearing cross frame, and the connection ends of the first section lead wire, the second section lead wire and the third section lead wire are prefabricated connection ends. The prefabricated distribution transformer rack of the present invention, the lead wire connection of the distribution transformer rack and its supporting products are prefabricated using standardized processes, which effectively solves the problem of differences in on-site construction processes of different operators, realizes prefabrication and standardization of lead wire crimping and insulation treatment, and the electrical performance of the product is tested and meets the requirements before it is shipped out of the factory for use, the quality is guaranteed, and the failure rate is effectively reduced. The distribution transformer rack is an integrated overall structure, which can be installed in a standardized manner, is fast and convenient, and is fully equipped.
Description
Technical Field
The invention relates to the technical field of power equipment, in particular to a preassembled distribution transformer rack.
Background
The 10KV distribution transformer rack is used as an important pivot for connecting distribution lines, the reliability and stability of operation are important, once faults occur, the coverage range is wide, the influence is large, the loss is immeasurable, the engineering vehicle is required to be used for rush repair, the operation is inconvenient, the time is long, and the cost is high. The lead wire connecting end head of the traditional distribution transformer rack and the matched products thereof are generally manufactured on site, time and labor are wasted, the construction period is long, the quality is different from person to person, the manufactured products are difficult to perform electrical performance test due to on-site conditions, are usually installed immediately without detection, the quality is not guaranteed, and the existing performance hidden trouble is a key factor causing faults.
Disclosure of Invention
The invention aims to provide the preassembled distribution transformer stand, the lead wire connection of the distribution transformer stand and the matched products thereof are prefabricated by adopting a standardized process, so that the problem of differentiation of field construction processes of different operators is effectively solved, prefabrication and standardization of lead wires in crimping and insulating treatment are realized, the electrical performance of the product is tested to meet the requirements and then delivered to the factory, the quality is ensured, the failure rate is effectively reduced, the distribution transformer stand is of an integrated integral structure, and the distribution transformer stand can be installed in a standardized manner, is quick and convenient and is complete in matching.
The invention is realized by the following technical scheme:
The preassembled distribution transformer stand comprises a disconnecting switch transverse frame, a fuse transverse frame, a lightning arrester transverse frame, N first-section lead wires, N second-section lead wires and N third-section lead wires, wherein N disconnecting switches are fixedly arranged on the disconnecting switch transverse frame, N fuses are fixedly arranged on the fuse transverse frame, N lightning arresters are arranged on the lightning arrester transverse frame, N is more than or equal to 1, the first-section lead wires, the second-section lead wires, the third-section lead wires, the disconnecting switches, the fuses and the lightning arresters are in one-to-one correspondence to form a group, and N groups are all arranged; one end of the first section lead wire is used for connecting a high-voltage overhead cable, the other end of the first section lead wire is connected with a lead-in end of the isolating switch through a prefabricated first prefabricated connecting end, one end of the second section lead wire is connected with a lead-out end of the isolating switch through a prefabricated second prefabricated connecting end, the other end of the second section lead wire is connected with a lead-in end of the fuse through a prefabricated third prefabricated connecting end, the third section lead wire is a prefabricated branch lead wire and comprises a main wire and a branch wire, one ends of the main wire and the branch wire are connected with the lead-out end of the fuse through a prefabricated Y-shaped prefabricated connecting end, the other end of the branch wire is connected with a lightning arrester through a prefabricated fourth prefabricated connecting end, and the other end of the main wire is used for connecting the lead-in end of the transformer.
Preferably, the prefabricated connecting end comprises a connecting end body, a flow increasing sleeve and a first insulating sheath injection molding body, the connecting end body is provided with a connecting terminal and a crimping pipe, the flow increasing sleeve is nested on the inner wall of the crimping pipe, a wire core corresponding to the lead wire is inserted into the flow increasing sleeve, the wire core of the lead wire, the flow increasing sleeve and the crimping pipe are fixedly connected together, and the first insulating sheath injection molding body is coated on the outer surfaces of the crimping pipe and the lead wire outer sheath in an injection molding mode.
Preferably, the material of the first insulating sheath injection molding body is the same as that of the lead wire outer sheath.
Preferably, the material of the connecting end body is the same as the material of the corresponding wiring terminal, and the material of the current increasing sleeve is the same as the material of the wire core of the lead wire.
Preferably, the sum of the cross-sectional areas of the crimp tube and the flow-increasing sleeve is greater than the cross-sectional area of the wire core of the lead wire by more than 30%.
Preferably, at least one of the isolating switch cross frame, the fuse cross frame and the lightning arrester cross frame is further provided with a first insulator for supporting the first section of lead wire, the second section of lead wire or the third section of lead wire, the preassembled distribution transformer stand further comprises a first wire tightener matched with the first insulator, and the first wire tightener is used for fastening the first section of lead wire, the second section of lead wire or the third section of lead wire on the corresponding first insulator.
Preferably, the preassembled distribution transformer rack further comprises an insulator transverse frame, wherein a second insulator for supporting the corresponding first-section lead wire and a second wire tightener matched with the second insulator are arranged on the insulator transverse frame, and the second wire tightener is used for tightly fixing the first-section lead wire clamp on the corresponding second insulator.
Preferably, the preassembled transformer stand further comprises a wire self-locking connecting device corresponding to the first-section lead wire and a plugging device, wherein the wire self-locking connecting device is used for fixedly connecting the first-section lead wire with a corresponding high-voltage overhead cable, and the plugging device is used for sealing and protecting the free end of the corresponding first-section lead wire; the end of the main line is prefabricated with a self-locking connecting end of the equipment, and the self-locking connecting end of the equipment is used for fixedly connecting the main line with the corresponding inlet wire end of the transformer.
Preferably, the prefabricated anti-falling power supply device further comprises a binding post, a protective shell and a second insulating sheath injection molding body, the binding post is fixedly connected with a wire core of the corresponding lead wire, the second insulating sheath injection molding body is coated on the outer sheath of the lead wire and the outer surface of the root of the binding post in an injection molding mode, the protective shell is of a split structure and comprises a first sub-shell and a second sub-shell, one ends of the first sub-shell and the second sub-shell are respectively positioned on two opposite sides of the binding post and are respectively hinged with the second insulating sheath injection molding body, the first sub-shell and the second sub-shell are further provided with a buckling structure and/or a magnetic structure which are opposite and matched with each other so that the first sub-shell and the second sub-shell can be in closed connection, and the outer surface of the first sub-shell and/or the second sub-shell is further provided with a poking structure which is convenient for enabling the first sub-shell and the second sub-shell to overcome the closing force of the structure and/or the magnetic structure to be separated.
Preferably, the n=3, that is, the preassembled transformer stand includes three groups of the first section lead wire, the second section lead wire, the third section lead wire, the isolating switch, the fuse and the lightning arrester, respectively correspond to three phases of the high-voltage overhead cable, and the colors of the outer jackets of the lead wires corresponding to different phases are different.
The preassembled distribution transformer rack has the beneficial effects that: the lead wire connection of the distribution transformer rack and the matched products thereof are manufactured in advance by adopting a standard process, so that the problem of differentiation of field construction processes of different operators is effectively solved, prefabrication and standardization of the lead wire crimping and insulating treatment are realized, the electrical performance of the product is tested to meet the requirements and then delivered for use, the quality is ensured, the failure rate is effectively reduced, the distribution transformer rack is of an integrated integral structure, standardized installation can be adopted, and the distribution transformer rack is rapid and convenient and complete in matching; the prefabricated connecting end is internally provided with the flow increasing sleeve, so that the flow passing area can be effectively increased, the sum of the cross sectional areas of the crimping pipe and the flow increasing sleeve is more than 30% larger than the cross sectional area of the wire core of the second-section lead wire before crimping, the crimping deformation is smaller, and even if the sum of the cross sectional areas of the crimping pipe and the flow increasing sleeve is subjected to crimping treatment, the sum of the cross sectional areas of the crimping pipe and the flow increasing sleeve is larger than the conductive cross sectional area of the original wire core, and the problem that the flow passing area of a crimping part is too small to become a hidden danger point caused by the traditional crimping process is effectively solved; the prefabricated connecting end is subjected to injection molding insulation treatment, the first insulation sheath injection molding body is in seamless butt joint with the corresponding lead wire outer sheath, the insulation performance is good, the problem of poor weather resistance of the traditional heat shrinkage pipe or cold shrinkage pipe is effectively solved, the prefabricated connecting end is more pressure-resistant and waterproof, the first insulation sheath injection molding body is homogeneous with the lead wire outer sheath material, the life cycle is consistent, the coefficient of thermal expansion and cold shrinkage is the same, and water seepage caused by crack generation at the joint caused by thermal expansion and cold shrinkage in the use process is avoided; the connecting end body of the prefabricated connecting end is the same as the corresponding wiring end, and the current increasing sleeve is the same as the wire core of the lead wire, so that the problem of copper-aluminum transition is effectively solved; the prefabricated branch lead wire can effectively solve the problems of heating loosening and the like of the connecting part caused by on-site crimping deformation, copper-aluminum transition, thermal expansion and contraction or vibration of the connecting part; the cable is fixed on the corresponding insulator by adopting the tightening wire clamp, so that the traditional manual binding wire fixing mode is replaced, the cable is not damaged, the cable is safer and firmer, the cable is not easy to loosen, and the construction process is more standard, uniform, convenient and quick; the prefabricated loose type equipment wire clamp is used for fixedly connecting the main wire with the corresponding inlet wire end of the transformer, and the standard process is used for crimping without damaging the lead. The self-locking anti-loose mechanism is provided to prevent the connection part from loosening due to the influence of factors such as thermal expansion and contraction, oxidization and galvanic corrosion, etc., so as to cause heating and burning; the insulation protection cover integrated lead self-locking connecting device is adopted to connect the first section of lead wire with the corresponding high-voltage overhead cable, the installation is simple and quick, the cable clamp is internally provided with the hooke self-locking module, and the connection part can be prevented from loosening due to vibration, expansion due to heat, contraction due to cold and the like; the terminal of the first lead wire is sealed by a plugging device, so that the waterproof effect is realized, and the safety and the convenience are realized; the lead wire is standardized in split-phase and color separation, is convenient for operation identification and is attractive.
The conception, specific structure, and resulting effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present invention.
Drawings
FIG. 1 is a schematic diagram of a preassembled distribution transformer stand according to the present invention;
FIG. 2 is a reference schematic diagram of the usage status of the pre-assembled distribution transformer stand according to the embodiment;
FIG. 3 is a schematic view of the second segment of the lead wire of FIG. 1;
FIG. 4 is a schematic view of the structure of the prefabricated anti-fall power supply device of FIG. 3 in a deployed state of a protective housing;
Fig. 5 is an exploded view of the prefabricated connecting terminal of fig. 3.
Wherein: the prefabricated power distribution transformer 100, the disconnecting switch cross frame 1, the disconnecting switch 11, the fuse cross frame 2, the fuse 21, the lightning arrester cross frame 3, the lightning arrester 31, the first section lead wire 4, the first prefabricated connecting terminal 41, the second section lead wire 5, the wire core 50, the second prefabricated connecting terminal 51, the connecting terminal body 511, the connecting terminal 5111, the crimping tube 5112, the current increasing sleeve 512, the first insulating sheath injection molding 513, the third prefabricated connecting terminal 52, the prefabricated anti-fall power supply 53, the wiring post 531, the second insulating sheath injection molding 532, the first split case 533, the second split case 534, the buckling structure 535, the magnetic attraction structure 536, the poking structure 537, the third section lead wire 6, the main wire 61, the split wire 62, the Y-shaped prefabricated connecting terminal 63, the fourth prefabricated connecting terminal 64, the insulator cross frame 7, the first insulator 71, the second insulator 72, the first tightener 81, the second tightener 82, the wire connecting device 91, the device connecting terminal 92, the high voltage transformer 300.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the description of the specific embodiments is intended for purposes of illustration only and is not intended to limit the scope of the present disclosure.
As shown in fig. 1-2, a preassembled distribution transformer stand 100 comprises a disconnecting switch transverse frame 1, a fuse transverse frame 2, a lightning arrester transverse frame 3, three first section lead wires 4, three second section lead wires 5 and three third section lead wires 6, wherein three disconnecting switches 11 are fixedly arranged on the disconnecting switch transverse frame 1, three fuses 21 are fixedly arranged on the fuse transverse frame 2, three lightning arresters 31 are arranged on the lightning arrester transverse frame 3, each first section lead wire 4, each second section lead wire 5, each third section lead wire 6, each disconnecting switch 11, each fuse 21 and each lightning arrestor 31 are in one-to-one correspondence to form a group, and three groups respectively correspond to three phases of a high-voltage overhead cable 200, and the colors of outer jackets of the lead wires corresponding to different phases are different; one end of the first-section lead wire 4 is used for connecting a high-voltage overhead cable 200, the other end is connected with the wire inlet end of the isolating switch 11 through a prefabricated first prefabricated connecting end 41, one end of the second-section lead wire 5 is connected with the wire outlet end of the isolating switch 11 through a prefabricated second prefabricated connecting end 51, the other end is connected with the wire inlet end of the fuse 21 through a prefabricated third prefabricated connecting end 52, the third-section lead wire 6 is a prefabricated branch lead wire and comprises a main wire 61 and a branch wire 62, one ends of the main wire 61 and the branch wire 62 are connected with the wire outlet end of the fuse 21 through a prefabricated Y-shaped prefabricated connecting end 63, the other end of the branch wire 62 is connected with the lightning arrester 31 through a prefabricated fourth prefabricated connecting end 64, and the other end of the main wire 61 is used for connecting the wire inlet end of the transformer 300. The length of the first segment of the lead wire 4 is preferably 4m, the length of the second segment of the lead wire is preferably 1.3m, the length of the main wire 61 of the third segment of the lead wire 6 is preferably 2.3m, and the length of the branch wire 61 is preferably 0.8m.
As shown in fig. 3-5, the prefabricated connecting end structures of the first prefabricated connecting end 41, the second prefabricated connecting end 51, the third prefabricated connecting end 52, the fourth prefabricated connecting end 64 and the Y-shaped prefabricated connecting end 63 are the same, taking the second prefabricated connecting end 51 as an example, the prefabricated connecting end comprises a connecting end body 511, a flow increasing sleeve 512 and a first insulating sheath injection molding body 513, the connecting end body 511 is provided with a connecting terminal 5111 and a crimping tube 5112, the flow increasing sleeve 512 is nested on the inner wall of the crimping tube 5112, the wire core 50 of the second-section lead wire 5 is inserted into the flow increasing sleeve 512 and fixedly connected with the wire core 50 of the second-section lead wire 5, the flow increasing sleeve 512 and the crimping tube 5112 in a crimping manner, and the first insulating sheath injection molding body 513 is coated on the outer surfaces of the crimping tube 5112 and the outer sheath of the second-section lead wire 5 in an injection molding manner. The sum of the cross-sectional areas of the crimp tube 5112 and the flow-increasing sleeve 512 is greater than the cross-sectional area of the core 50 of the second-stage lead wire 5 by more than 30%. The first insulating sheath injection molding 513 is the same material as the outer sheath of the second segment lead wire 5. The material of the connecting end body 511 is the same as that of the wire inlet end of the isolating switch 11, and the material of the current increasing sleeve 512 is the same as that of the wire core of the second section of lead wire 5; preferably, the connecting terminal body 511 is made of copper, and the flow increasing sleeve 512 is made of aluminum.
As shown in fig. 3-4, the second segment lead wire 5 is further prefabricated with a prefabricated anti-falling power supply device 53, the prefabricated anti-falling power supply device 53 includes a binding post 531, a protective housing and a second insulating sheath injection molding body 532, the core of the binding post 531 and the core of the second segment lead wire 5 are vertically and fixedly connected, the second insulating sheath injection molding body 532 is coated on the outer sheath of the second segment lead wire 5 and the outer surface of the root of the binding post 531 in an injection molding mode, the protective housing is in a split structure and comprises a first split shell 533 and a second split shell 534, one ends of the first split shell 533 and the second split shell 534 are respectively located on two opposite sides of the binding post 531 and are respectively hinged with the second insulating sheath injection molding body 532, the first split shell 533 and the second split shell 534 are further provided with a clamping structure 535 and a magnetic attraction structure 536 which are opposite and are mutually matched so that the first split shell 533 and the second split shell 534 can be closed and connected, the outer surfaces of the first split shell 533 and the second split shell 534 are further provided with a hook-shaped structure 537 which is convenient for enabling the clamping structure of the first split shell 533 and the second split shell 534 to be coated in the inner part, and the hook-shaped structure 537 is preferably arranged on the split structure.
As shown in fig. 1-2, the isolating switch transverse frame 1 and the lightning arrester transverse frame 3 are further respectively provided with three first insulators 71 for supporting the first section lead wire 4 and the third section lead wire 6, the preassembled distribution transformer stand further comprises a first wire tightener 81 matched with the first insulator 71, and the first wire tightener 81 is used for clamping and fixing the first section lead wire 4, the second section lead wire 5 or the third section lead wire 6 on the corresponding first insulator 71. The preassembled distribution transformer stand further comprises an insulator transverse frame 7, wherein the insulator transverse frame 7 is provided with three second insulators 72 used for supporting the corresponding first-section lead wires 4 and second tighteners 82 matched with the second insulators 72, and the second tighteners 82 are used for clamping and fixing the first-section lead wires 4 on the corresponding second insulators 72. The structures of the first tightener 81 and the second tightener 82 can refer to the published Chinese patent application of ' a hinged tightening clamp ' (application number: 201810128980.1) ', or the published Chinese patent application of ' a double clamping plate type street clamp ' (application number: 201710863575. X).
As shown in fig. 1-2, the preassembled transformer stand further includes six wire self-locking connection devices 91 corresponding to the first segment of lead wires 4, each first segment of lead wires 4 corresponds to two wire self-locking connection devices 91, and the wire self-locking connection devices 91 are used for fixedly connecting the first segment of lead wires 4 with the corresponding high-voltage overhead cable 200; the end of the main line 61 is prefabricated with a device self-locking connection end 92, and the device self-locking connection end 92 is used for fixedly connecting the main line 61 with a corresponding incoming line end of the transformer 300. The structure of the self-locking connection device 91 can refer to the published chinese patent application "an anti-tilting connection cable clamp" (application number: 201710259516.9). The structure of the self-locking connection terminal 92 can be referred to as a self-locking connection terminal of the device according to the published chinese patent application No. 201710605239.5. The preassembled distribution transformer rack further comprises three plugging devices 93 corresponding to the free ends of the first-section lead wires 4, and the plugging devices 93 are used for sealing and protecting the free ends corresponding to the first-section lead wires 4. The structure of the plugging device 93 can be referred to as a cable plugging device (application number: 201610904679.6) of the published chinese patent.
The preassembled distribution transformer rack has the beneficial effects that: the lead wire connection of the distribution transformer rack and the matched products thereof are manufactured in advance by adopting a standard process, so that the problem of differentiation of field construction processes of different operators is effectively solved, prefabrication and standardization of the lead wire crimping and insulation treatment are realized, the electrical performance of the product is tested to meet the requirements and then is put into use, the quality is ensured, the failure rate is effectively reduced, the distribution transformer rack is an integrated integral structure, and when in installation, the isolating switch transverse frame, the fuse transverse frame and the lightning arrester transverse frame are directly fixed at the proper positions on the telegraph pole beside the transformer, then the first segment of lead wire and the high-voltage overhead cable are correspondingly connected by the wire self-locking connecting device, and the main wire of the third segment of lead wire and the wiring terminal of the transformer are correspondingly connected, so that the installation of the distribution transformer rack is completed, and the standardized installation is adopted, thereby being quick and convenient and complete in matching; the prefabricated connecting end is internally provided with the flow increasing sleeve, so that the flow passing area can be effectively increased, the sum of the cross sectional areas of the crimping pipe and the flow increasing sleeve is more than 30% larger than the cross sectional area of the wire core of the second-section lead wire before crimping, the crimping deformation is smaller, and even if the sum of the cross sectional areas of the crimping pipe and the flow increasing sleeve is subjected to crimping treatment, the sum of the cross sectional areas of the crimping pipe and the flow increasing sleeve is larger than the conductive cross sectional area of the original wire core, and the problem that the flow passing area of a crimping part is too small to become a hidden danger point caused by the traditional crimping process is effectively solved; the prefabricated connecting end is subjected to injection molding insulation treatment, the first insulation sheath injection molding body is in seamless butt joint with the corresponding lead wire outer sheath, the insulation performance is good, the problem of poor weather resistance of the traditional heat shrinkage pipe or cold shrinkage pipe is effectively solved, the prefabricated connecting end is more pressure-resistant and waterproof, the first insulation sheath injection molding body is homogeneous with the lead wire outer sheath material, the life cycle is consistent, the coefficient of thermal expansion and cold shrinkage is the same, and water seepage caused by crack generation at the joint caused by thermal expansion and cold shrinkage in the use process is avoided; the connecting end body of the prefabricated connecting end is the same as the corresponding wiring end, and the current increasing sleeve is the same as the wire core of the lead wire, so that the problem of copper-aluminum transition is effectively solved; the prefabricated branch lead wire can effectively solve the problems of heating loosening and the like of the connecting part caused by on-site crimping deformation, copper-aluminum transition, thermal expansion and contraction or vibration of the connecting part; the cable is fixed on the corresponding insulator by adopting the tightening wire clamp, so that the traditional manual binding wire fixing mode is replaced, the cable is not damaged, the cable is safer and firmer, the cable is not easy to loosen, and the construction process is more standard, uniform, convenient and quick; the prefabricated loose type equipment wire clamp is used for fixedly connecting the main wire with the corresponding inlet wire end of the transformer, and the standard process is used for crimping without damaging the lead. The self-locking anti-loose mechanism is provided to prevent the connection part from loosening due to the influence of factors such as thermal expansion and contraction, oxidization and galvanic corrosion, etc., so as to cause heating and burning; the insulation protection cover integrated lead self-locking connecting device is adopted to connect the first section of lead wire with the corresponding high-voltage overhead cable, the installation is simple and quick, the cable clamp is internally provided with the hooke self-locking module, and the connection part can be prevented from loosening due to vibration, expansion due to heat, contraction due to cold and the like; the terminal of the first lead wire is sealed by a plugging device, so that the waterproof effect is realized, and the safety and the convenience are realized; the lead wire is standardized in split-phase and color separation, is convenient for operation identification and is attractive.
Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Claims (8)
1. The preassembled distribution transformer stand is characterized by comprising an isolating switch transverse frame, a fuse transverse frame, a lightning arrester transverse frame, N first-section lead wires, N second-section lead wires and N third-section lead wires, wherein N isolating switches are fixedly arranged on the isolating switch transverse frame, N fuses are fixedly arranged on the fuse transverse frame, N lightning arresters are arranged on the lightning arrester transverse frame, N is more than or equal to 1, the first-section lead wires, the second-section lead wires, the third-section lead wires, the isolating switches, the fuses and the lightning arresters are in one-to-one correspondence to form a group, and N groups are all arranged; one end of the first section of lead wire is used for connecting a high-voltage overhead cable, the other end of the first section of lead wire is connected with a wire inlet end of the isolating switch through a prefabricated first prefabricated connecting end, one end of the second section of lead wire is connected with a wire outlet end of the isolating switch through a prefabricated second prefabricated connecting end, the other end of the second section of lead wire is connected with a wire inlet end of the fuse through a prefabricated third prefabricated connecting end, the third section of lead wire is a prefabricated branch lead wire and comprises a main wire and a branch wire, one ends of the main wire and the branch wire are connected with the wire outlet end of the fuse through a prefabricated Y-shaped prefabricated connecting end, the other end of the branch wire is connected with a lightning arrester through a prefabricated fourth prefabricated connecting end, and the other end of the main wire is used for connecting the wire inlet end of the transformer;
The prefabricated connecting end comprises a connecting end body, a current-increasing sleeve and a first insulating sheath injection molding body, wherein the connecting end body is provided with a wiring terminal and a crimping pipe, the current-increasing sleeve is nested on the inner wall of the crimping pipe, a wire core corresponding to the lead wire is inserted into the current-increasing sleeve, the wire core of the lead wire, the current-increasing sleeve and the crimping pipe are fixedly connected together, and the first insulating sheath injection molding body is coated on the outer surfaces of the crimping pipe and an outer sheath of the lead wire in an injection molding mode;
The utility model provides a power supply device is prevented down by prefabricated formula on still having prefabricated formula in first section lead wire, second section lead wire, the main line, prefabricated formula prevents down power supply device includes terminal, protective housing and second insulating sheath injection molding body, terminal and the sinle silk fixed connection of corresponding lead wire, the second insulating sheath injection molding body adopts injection molding's mode cladding at the surface of lead wire oversheath and terminal root, protective housing is split structure, including first inferior valve and second inferior valve, and the one end of first inferior valve and second inferior valve is located the opposite both sides of terminal respectively and articulates with the insulating sheath injection molding body of second respectively, still is equipped with relative and mutually supporting buckle structure and/or magnetism structure on first inferior valve and the second inferior valve so that first inferior valve and second inferior valve can close the connection and thereby wrap up inside, and the surface of first inferior valve and/or second inferior valve still is equipped with the structure of dialling that is convenient for make first buckle shell and second inferior valve overcome the closing force of structure and/or magnetism structure and separate.
2. The preassembled transformer station of claim 1 wherein the first insulating jacket injection molding is the same material as the lead wire outer jacket.
3. The preassembled transformer stand according to claim 1, wherein the connecting end body is made of the same material as the corresponding terminal, and the current-increasing sleeve is made of the same material as the wire core of the lead wire.
4. The preassembled transformer stand of claim 1 wherein the sum of the cross-sectional areas of the crimp tube and the flow-enhancing sleeve is greater than 30% of the cross-sectional area of the wire core of the lead wire.
5. The preassembled transformer stand according to claim 1, wherein at least one of the isolating switch cross frame, the fuse cross frame and the lightning arrester cross frame is further provided with a first insulator for supporting the first section lead wire, the second section lead wire or the third section lead wire, and the preassembled transformer stand further comprises a first tightener matched with the first insulator, and the first tightener is used for fastening the first section lead wire, the second section lead wire or the third section lead clamp on the corresponding first insulator.
6. The preassembled transformer stand according to claim 1, further comprising an insulator cross frame, wherein a second insulator for supporting the corresponding first-section lead wire and a second tightener for mating with the second insulator are provided on the insulator cross frame, and the second tightener is used for fastening the first-section lead clamp to the corresponding second insulator.
7. The preassembled transformer substation bench according to claim 1, further comprising a wire self-locking connection device corresponding to the first segment of lead wire and a stopper, wherein the wire self-locking connection device is used for fixedly connecting the first segment of lead wire with a corresponding high-voltage overhead cable, and the stopper is used for sealing and protecting a free end of the corresponding first segment of lead wire; the end of the main line is prefabricated with a self-locking connecting end of the equipment, and the self-locking connecting end of the equipment is used for fixedly connecting the main line with the corresponding inlet wire end of the transformer.
8. The preassembled transformer substation rack according to claim 1, wherein n=3, that is, the preassembled transformer substation rack includes three groups of the first-segment lead wire, the second-segment lead wire, the third-segment lead wire, the isolating switch, the fuse and the lightning arrester, which correspond to three phases of a high-voltage overhead cable respectively, and the colors of outer jackets of the lead wires corresponding to different phases are different.
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| CN110380338B (en) * | 2019-07-25 | 2024-06-11 | 无锡亿能电力设备股份有限公司 | Power supply side overhead wire inlet device and method for skid movable box-type transformer substation |
| CN113541040B (en) * | 2021-07-07 | 2022-09-02 | 新奥(广西)能源销售有限公司 | Wiring auxiliary device for overhead operation of power system and using method thereof |
| CN115498546A (en) * | 2022-09-30 | 2022-12-20 | 广西电网有限责任公司南宁供电局 | The structure of a 10kV distribution transformer platform |
| CN119361302B (en) * | 2024-12-23 | 2025-04-22 | 广州勇艺邦电子科技有限公司 | A 10kV distribution transformer rack prefabricated high voltage lead wire assembly |
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| KR100388089B1 (en) * | 2001-05-24 | 2003-06-18 | 강정구 | A Hydroelectricity Transformer Having Laminating Structure |
| DE10358273A1 (en) * | 2003-12-11 | 2005-07-21 | Energie Wasser Niederrhein Gmbh | Mast with medium voltage overhead lines, transformer, phase lines and bird protection, has insulated screens maintaining critical mutual spacing between phases, and to earth |
| CN102222862A (en) * | 2011-06-20 | 2011-10-19 | 郭建厂 | Intelligent open-type insulated transformer platform |
| CN205724808U (en) * | 2016-06-27 | 2016-11-23 | 陕西博华高低压开关成套设备制造有限公司 | substation structure |
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