CN112563028B - Double-group type three-phase low-voltage power capacitor - Google Patents
Double-group type three-phase low-voltage power capacitor Download PDFInfo
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- CN112563028B CN112563028B CN202011515159.9A CN202011515159A CN112563028B CN 112563028 B CN112563028 B CN 112563028B CN 202011515159 A CN202011515159 A CN 202011515159A CN 112563028 B CN112563028 B CN 112563028B
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- 239000003990 capacitor Substances 0.000 title claims abstract description 100
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052802 copper Inorganic materials 0.000 claims abstract description 23
- 239000010949 copper Substances 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims description 57
- 230000001681 protective effect Effects 0.000 claims description 17
- 238000003466 welding Methods 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 4
- 238000005476 soldering Methods 0.000 claims description 3
- 238000004880 explosion Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/38—Multiple capacitors, i.e. structural combinations of fixed capacitors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/224—Housing; Encapsulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/228—Terminals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/32—Wound capacitors
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- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The invention discloses a double-group type three-phase low-voltage power capacitor which comprises a first capacitor coil, a second capacitor coil, a third capacitor coil, a fourth capacitor coil, a fifth capacitor coil, a sixth capacitor coil, a first connecting rod, a second connecting rod, a first contact element, a second contact element, a third contact element, a fourth contact element, a fifth contact element, a sixth contact element, a seventh contact element, an eighth contact element, a rectangular barrel cover and an external connecting wire fixing element. The invention has reasonable structure, the capacitor coils are in rigid connection through the contact piece of the copper sheet and are finally locked and fixed through the connecting rod, the assembly is simple and convenient, and the technical performance, the economical efficiency and the safety of the power capacitor are improved.
Description
Technical Field
The invention relates to a low-voltage power capacitor, in particular to a double-group three-phase low-voltage power capacitor, belonging to the field of power capacitors.
Background
The low-voltage power capacitor is used for reactive compensation of a low-voltage distribution power grid, and has a wide range and a large quantity, so that the power factor of the low-voltage distribution power grid is improved, the loss of the power grid is reduced, and the output of the power grid and the quality of electric energy are improved. The double-group three-phase low-voltage power capacitor is widely used due to the characteristics of high integration level, reasonable structure, small volume, easy installation and the like.
The internal structure of the existing low-voltage power capacitor mainly has the problems of overlong connecting wires, more welding, unreasonable explosion-proof mechanism and the like, so that the internal structure of the existing low-voltage power capacitor is too much in material consumption, difficult to assemble, difficult to guarantee the quality and the like.
Disclosure of Invention
The invention aims to solve the technical problem of providing a double-group three-phase low-voltage power capacitor which has the characteristics of simple structure, convenience in assembly, reliable performance and the like.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a two-group three-phase low-voltage power capacitor is characterized in that: comprises a first capacitor roll, a second capacitor roll, a third capacitor roll, a fourth capacitor roll, a fifth capacitor roll, a sixth capacitor roll, a first connecting rod, a second connecting rod, a first contact member, a second contact member, a third contact member, a fourth contact member, a fifth contact member, a sixth contact member, a seventh contact member, an eighth contact member, a rectangular barrel cover and an external wiring fixing member, wherein the first contact member, the first capacitor roll, the second contact member, the second capacitor roll, the third contact member, the third capacitor roll and the fourth contact member are sequentially arranged and fixedly connected through the first connecting rod to form a group of three-phase capacitors, the fifth contact member, the fourth capacitor roll, the sixth contact member, the fifth capacitor roll, the seventh contact member, the sixth capacitor roll and the eighth contact member are sequentially arranged and fixedly connected through the second connecting rod to form another group of three-phase capacitors, two groups of capacitors are arranged in the rectangular barrel, the rectangular barrel cover is arranged on the upper side of the rectangular barrel, and the external connecting wire fixing piece is arranged on the rectangular barrel cover and is connected with all the contact pieces through the connecting wires.
Furthermore, the first contact element, the second contact element, the third contact element, the fourth contact element, the fifth contact element, the sixth contact element, the seventh contact element and the eighth contact element comprise copper sheets, center holes, welding ends, contact holes and sharp objects, the contact holes are uniformly distributed on the copper sheets, the sharp objects of the first contact element, the fourth contact element, the fifth contact element and the eighth contact element are all located on one sides of the copper sheets, the sharp objects of the second contact element, the third contact element, the sixth contact element and the seventh contact element are located on two sides of the copper sheets, each contact hole is correspondingly provided with at least two sharp objects, the sharp objects of the same contact hole are in the same direction, the center holes are located in the centers of the copper sheets, and the welding ends are arranged on the copper sheets and arranged on the outer edges of the copper sheets.
Furthermore, the number of the contact holes of the first contact element, the second contact element, the third contact element, the fourth contact element, the fifth contact element, the sixth contact element, the seventh contact element and the eighth contact element is not less than four, and the number of sharp objects on the inner side of each contact hole is not less than two.
Furthermore, one end of the first connecting rod is clamped and pressed to be fixed on the first fixing clamp plate through the first fixing rod head, the other end of the first connecting rod is locked and fixed on the second fixing clamp plate through the first fixing nut, one end of the second connecting rod is clamped and pressed to be fixed on the first fixing clamp plate through the second fixing rod head, and the other end of the second connecting rod is locked and fixed on the second fixing clamp plate through the second fixing nut.
Furthermore, six external connection terminals are arranged in the external connection fixing piece, the external connection terminals are L-shaped terminals, a main hole and a plurality of auxiliary holes are formed in the horizontal part of the lower end of each external connection terminal, the lower end of each external connection terminal is injected into the external connection fixing piece, a round pit is formed in the position, corresponding to the main hole of each external connection terminal, of the upper side of each external connection fixing piece, the diameter of each round pit is larger than that of the main hole of each external connection terminal, and therefore part of the external connection terminals are exposed; the lower side of the external connection fixing piece is provided with an insulating protective cylinder corresponding to the position of the main hole of the external connection terminal, and the inner diameter of the insulating protective cylinder is not smaller than the diameter of the main hole of the external connection terminal.
Furthermore, a circle of sealing groove is formed in the edge of the lower side surface of the external wiring fixing piece, the sealing piece is clamped in the sealing groove, a sealing pressure plate is arranged on the lower side of the rectangular barrel cover, a plurality of sealing nuts are fixed on the lower side of the external wiring fixing piece, through holes corresponding to the sealing nuts of the external wiring fixing piece are formed in the rectangular barrel cover and the sealing pressure plate, and sealing screws penetrate through the through holes of the rectangular barrel cover and the sealing pressure plate and are locked and fixed in the sealing nuts of the external wiring fixing piece; through holes corresponding to the insulating protective barrels are formed in the rectangular barrel cover and the sealing element, and the insulating protective barrels on the external wiring fixing piece penetrate through the corresponding through holes in the rectangular barrel cover and the sealing element; the sealing nut and the insulating protective cylinder on the external wiring fixing piece are both in the range of the sealing groove.
Furthermore, two groups of explosion-proof devices are arranged on the lower side of the sealing pressure plate, each group of explosion-proof device comprises a first explosion-proof piece and a second explosion-proof piece, a first explosion-proof strip, a second explosion-proof strip and a third explosion-proof strip are arranged on the first group of explosion-proof device, a fourth explosion-proof strip, a fifth explosion-proof strip and a sixth explosion-proof strip are arranged on the second group of explosion-proof device, all the explosion-proof strips respectively comprise a bottom end, a short end and a long end, the bottom end is horizontally arranged, the short end and the long end are perpendicular to the bottom end, the lower ends of the short ends are connected with one end of the bottom end, the lower ends of the long ends are connected with the other end of the bottom end, each group of explosion-proof device is provided with at least two explosion-proof holes, the short ends and the long ends of all the explosion-proof strips are respectively connected with the first explosion-proof piece and the second explosion-proof piece, and the short ends and the long ends of the two adjacent explosion-proof strips are arranged in a staggered manner; one end of each of the first connecting line, the second connecting line, the third connecting line and the fourth connecting line is connected with the welding end of each of the first contact element, the second contact element, the third contact element and the fourth contact element respectively, the other end of each of the first connecting line, the second connecting line and the third connecting line is connected with the short end of each of the first explosion-proof strip, the second explosion-proof strip and the third explosion-proof strip of the first group of explosion-proof devices respectively, and the other end of the fourth connecting line is connected with the short end of the first explosion-proof strip; one end of the fifth connecting line, one end of the sixth connecting line, one end of the seventh connecting line and one end of the eighth connecting line are connected with the welding ends of the fifth contact element, the sixth contact element, the seventh contact element and the eighth contact element respectively, the other ends of the fifth connecting line, the sixth connecting line and the seventh connecting line are connected with the short ends of the fourth explosion-proof strip, the fifth explosion-proof strip and the sixth explosion-proof strip of the second group of explosion-proof devices respectively, and the other end of the eighth connecting line is connected with the short end of the fourth explosion-proof strip.
Furthermore, the long ends of the six explosion-proof bars penetrate into the six corresponding insulating protective barrels, the insulating protective barrels sequentially penetrate through the through holes in the rectangular barrel cover and the through holes in the sealing pressing plate, and the long ends of the explosion-proof bars penetrate out of the main hole of the external wiring terminal and are fixed with the external wiring terminal in a soldering mode at the round pit on the external wiring fixing piece.
Furthermore, the downside of the first group of explosion-proof device is provided with two hook members, the downside of the second group of explosion-proof device is provided with two hook members, the upper ends of the inner walls of the two sides of the long edge of the rectangular barrel are provided with inserts matched with the hook members of the explosion-proof device, and the first group of explosion-proof device and the second group of explosion-proof device are fixed in the inserts in the rectangular barrel through the hook members.
Compared with the prior art, the invention has the following advantages and effects: the double-group three-phase low-voltage power capacitor is reasonable in structure, capacitor coils are in rigid connection through the contact piece of the copper sheet and are finally locked and fixed through the connecting rod, assembly is simple and convenient, then the capacitor coils are connected with the explosion-proof piece through the connecting wire and then connected with the wiring terminal, when explosion occurs in the capacitor, the barrel body expands, so that the two explosion-proof pieces are pulled open to break the explosion-proof strip at the explosion-proof hole to cut off power supply to the capacitor coils, explosion continuation is avoided, and the safe use effect of the power capacitor is improved.
Drawings
Fig. 1 is a schematic diagram of a two-pack type three-phase low voltage power capacitor of the present invention.
Fig. 2 is a schematic view of the second, third, sixth and seventh contacts of the present invention.
Fig. 3 is a schematic view of the first, fourth, fifth and eighth contacts of the present invention.
Fig. 4 is a schematic view of an external connection terminal of the present invention.
Fig. 5 is a schematic view of the external connection fixture of the present invention.
Detailed Description
To elaborate on technical solutions adopted by the present invention to achieve predetermined technical objects, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, it is obvious that the described embodiments are only partial embodiments of the present invention, not all embodiments, and technical means or technical features in the embodiments of the present invention may be replaced without creative efforts, and the present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.
As shown in fig. 1, the two-pack three-phase low voltage power capacitor of the present invention comprises a first capacitor roll 1, a second capacitor roll 2, a third capacitor roll 3, a fourth capacitor roll 4, a fifth capacitor roll 5, a sixth capacitor roll 6, a first connecting rod 7, a second connecting rod 8, a first contact 9, a second contact 10, a third contact 11, a fourth contact 12, a fifth contact 13, a sixth contact 14, a seventh contact 15, an eighth contact 16, a rectangular barrel 27, a rectangular barrel cover 28, and an external wire fixing member 30, wherein the first contact 9, the first capacitor roll 1, the second contact 10, the second capacitor roll 2, the third contact 11, the third capacitor roll 3, and the fourth contact 12 are sequentially arranged and fixedly connected by the first connecting rod 7 to form a set of three-phase capacitors, the fifth contact 13, the third contact 11, the third capacitor roll 3, and the fourth contact 12 are fixedly connected in this order, and the first connecting rod 7 is used to form a set of three-phase capacitors, and the fifth contact 13, The fourth capacitor roll 4, the sixth contact element 14, the fifth capacitor roll 5, the seventh contact element 15, the sixth capacitor roll 6 and the eighth contact element 16 are sequentially arranged in sequence and fixedly connected through the second connecting rod 8 to form another group of three-phase capacitors, two groups of capacitors are arranged in the rectangular barrel 27, the rectangular barrel cover 28 is covered on the upper side of the rectangular barrel 27, and the external connecting wire fixing member 30 is arranged on the rectangular barrel cover 28 and connected with all the contact elements through connecting wires.
As shown in fig. 2 and 3, the first contact 9, the second contact 10, the third contact 11, the fourth contact 12, the fifth contact 13, the sixth contact 14, the seventh contact 15 and the eighth contact 16 comprise a copper sheet 48, a central hole 49, a wire bonding end 50, contact holes 51 and sharp objects 52, the contact holes 51 are uniformly distributed on the copper sheet 48, the sharp objects 52 of the first contact 9, the fourth contact 12, the fifth contact 13 and the eighth contact 16 are all positioned on one side of the copper sheet 48, the sharp objects 52 of the second contact 10, the third contact 11, the sixth contact 14 and the seventh contact 15 are positioned on two sides of the copper sheet 48, at least two sharp objects 52 are correspondingly arranged in each contact hole 51, the sharp objects 52 of the same contact hole 51 are oriented in the same direction, and the central hole 49 is positioned in the center of the copper sheet 48 and is arranged on the copper sheet 48. At the time of installation, the sharp object 52 is embedded in the end face of the capacitor roll and maintains good contact.
As shown in fig. 2 and 3, the number of the contact holes 51 of the first contact 9, the second contact 10, the third contact 11, the fourth contact 12, the fifth contact 13, the sixth contact 14, the seventh contact 15 and the eighth contact 16 is not less than four, and the number of the sharp objects 52 on the inner side of each contact hole 51 is not less than two.
As shown in fig. 1, one end of the first connecting rod 7 is fixed on the first fixing clamp plate 32 by the first fixing rod head 34, the other end of the first connecting rod 7 is fixed on the second fixing clamp plate 33 by the first fixing nut 35, one end of the second connecting rod 8 is fixed on the first fixing clamp plate 32 by the second fixing rod head 36, and the other end of the second connecting rod 8 is fixed on the second fixing clamp plate 33 by the second fixing nut 37.
As shown in fig. 1, 4 and 5, six external connection terminals 53 are disposed in the external connection fixture 30, the external connection terminals 53 are L-shaped terminals, a main hole 54 and a plurality of auxiliary holes 55 are formed in a horizontal portion of a lower end of each external connection terminal 53, and the auxiliary holes 55 are used for reinforcing the connection strength between the external connection terminals 53 and the external connection fixture 30. The lower end of the external connection terminal 53 is injected into the external connection fixing member 30, a round pit 56 is formed on the upper side of the external connection fixing member 30 corresponding to the main hole 54 of the external connection terminal 53, and the diameter of the round pit 56 is larger than that of the main hole 54 of the external connection terminal 53 so as to expose part of the external connection terminal. An insulating sheath 57 is provided on the lower side of the external wire fixing member 30 at a position corresponding to the main hole 54 of the external wire terminal 53, and the inner diameter of the insulating sheath 57 is not smaller than the diameter of the main hole 54 of the external wire terminal 53.
As shown in fig. 1 and 5, a circle of sealing groove 58 is formed at the lower side edge of the external wiring fixing member 30, the sealing member 29 is clamped in the sealing groove 58, the sealing pressing plate 31 is arranged at the lower side of the rectangular barrel cover 28, and at least four sealing nuts 59 are fixed at the lower side of the external wiring fixing member 30. The rectangular barrel cover 28 and the sealing pressure plate 31 are provided with through holes 61 and 62 corresponding to the sealing nut 59 of the external wiring fixing member 30, the sealing screw 60 penetrates through the through holes 61 and 62 of the rectangular barrel cover 28 and the sealing pressure plate 31 and is locked and fixed in the sealing nut 59 of the external wiring fixing member 30, the rectangular barrel cover 28 and the sealing pressure plate 31 are provided with through holes 63 and 64 corresponding to the insulating protective barrel 57, the insulating protective barrel 57 on the external wiring fixing member 30 penetrates through the through holes 63 and 64 of the rectangular barrel cover 28 and the sealing pressure plate 31, and the sealing nut 59 and the insulating protective barrel 57 on the external wiring fixing member 30 are both in the range of the sealing groove 58.
As shown in fig. 1, two groups of explosion-proof devices are disposed on the lower side of the sealing plate 31, each group of explosion-proof device includes a first explosion-proof piece 25 and a second explosion-proof piece 26, the first group of explosion-proof device includes a first explosion-proof strip 38, a second explosion-proof strip 39 and a third explosion-proof strip 40, the second group of explosion-proof device includes a fourth explosion-proof strip 41, a fifth explosion-proof strip 42 and a sixth explosion-proof strip 43, all the explosion-proof strips include a bottom end, a short end and a long end, the bottom end is horizontally disposed, the short end and the long end are perpendicular to the bottom end, the short end and the short end are connected to one end of the bottom end, the long end and the bottom end are connected, each group of explosion-proof device includes at least two explosion-proof holes 44, the short end and the long end of all the explosion-proof strips are connected to the first explosion-proof piece 25 and the second explosion-proof piece 26, and the short end and the long end of two adjacent explosion-proof strips are disposed in a staggered manner. One end of each of the first connecting line 17, the second connecting line 18, the third connecting line 19 and the fourth connecting line 20 is connected with the welding end 50 of each of the first contact member 9, the second contact member 10, the third contact member 11 and the fourth contact member 12, the other end of each of the first connecting line 17, the second connecting line 18 and the third connecting line 19 is connected with the short end of each of the first explosion-proof strip 38, the second explosion-proof strip 39 and the third explosion-proof strip 40 of the first group of explosion-proof devices, the other end of each of the fourth connecting line 20 is connected with the short end of the first explosion-proof strip 38, one end of each of the fifth connecting line 21, the sixth connecting line 22, the seventh connecting line 23 and the eighth connecting line 24 is connected with the welding end 50 of each of the fifth contact member 13, the sixth contact member 14, the seventh contact member 15 and the eighth contact member 16, and the other end of each of the fifth connecting line 21, the sixth connecting line 22 and the seventh connecting line 23 is connected with the fourth explosion-proof strip 41, the fourth explosion-proof strip 40 of the second group of explosion-proof devices, The short ends of the fifth explosion-proof strip 42 and the sixth explosion-proof strip 43 are connected, and the other end of the eighth connecting line 24 is connected with the short end of the fourth explosion-proof strip 41.
As shown in fig. 1, 4 and 5, the long ends of the six explosion-proof bars penetrate into the corresponding six insulating protection cylinders 57, the insulating protection cylinders 57 sequentially penetrate through the through holes 64 of the sealing pressure plate 31 and the through holes 63 of the rectangular barrel cover 28, and the long ends of the explosion-proof bars penetrate out of the main holes 54 of the external wiring terminals 53 and are soldered and fixed with the external wiring terminals 53 at the round pits 56 of the external wiring fixing member 30.
As shown in fig. 1, two hook members 46 are provided on the lower side of the first group of explosion-proof devices, two hook members 46 are provided on the lower side of the second group of explosion-proof devices, inserts 47 matched with the hook members 46 of the explosion-proof devices are provided on the upper ends of the inner walls on both sides of the long side of the rectangular barrel 27, and the first group of explosion-proof devices and the second group of explosion-proof devices are fixed in the inserts 47 in the rectangular barrel 27 through the hook members 46. If the capacitor coil is exploded due to accident, the side of the rectangular tub 27 is expanded outward, and the first explosion-proof strip 38, the second explosion-proof strip 39, the third explosion-proof strip 40, the fourth explosion-proof strip 41, the fifth explosion-proof strip 42 and the sixth explosion-proof strip 43 are pulled off at the explosion-proof hole 44 by the first and second explosion-proof devices, thereby cutting off the power to prevent the development of explosion.
The installation process of the double-group three-phase low-voltage power capacitor comprises the following steps:
a first fixing plate 32, a first contact element 9, a first capacitor roll 1, a second contact element 10, a second capacitor roll 2, a third contact element 11, a third capacitor roll 3, a fourth contact element 12 and a second fixing clamp plate are sequentially connected in series and pressed by using a first connecting rod 7, and are fastened by using a first fixing rod head 34 and a first fixing nut 35; the first fixing splint 32, the fifth contact element 13, the fourth capacitor roll 4, the sixth contact element 14, the fifth capacitor roll 5, the seventh contact element 15, the sixth capacitor roll 6, the eighth contact element 16 and the second fixing splint 33 are sequentially connected in series and pressed by using the second connecting rod 8, and are fastened by using a second fixing rod head 36 and a second fixing nut 37; respectively connecting a first connecting line 17, a second connecting line 18 and a third connecting line 19 with the short ends of a first explosion-proof strip 38, a second explosion-proof strip 39 and a third explosion-proof strip 40, and connecting a fourth connecting line 20 with the short end of the first explosion-proof strip 38; the fifth connecting line 21, the sixth connecting line 22 and the seventh connecting line 23 are connected with the short ends of the fourth explosion-proof strip 41, the fifth explosion-proof strip 42 and the sixth explosion-proof strip 43, and the eighth connecting line 24 is connected with the short end of the fourth explosion-proof strip 41, so that a capacitor assembly which is not scattered is formed.
B. The sealing element 29 is placed in the sealing groove 58 below the external wiring fixing element 30, the upper side of the rectangular barrel cover 28 is tightly attached to the lower side of the external wiring fixing element 30, the upper side of the sealing pressure plate 31 is tightly attached to the lower side of the rectangular barrel cover 28, and the external wiring fixing element 30, the rectangular barrel cover 28 and the sealing pressure plate 31 are fastened by using the sealing screw 60 to form a sealing assembly.
C. The capacitor assembly formed by "a" is put into the rectangular tub 27 → the hook members 46 of the first and second explosion proof devices on the capacitor assembly are inserted into the insert 47 on the sidewall of the rectangular tub 27 → the insulating filler is poured into the rectangular tub 27.
D. Aligning the main hole 54 of the external connection terminal 53 on the sealing assembly formed by 'B' with the long end of the first explosion-proof strip 38, the second explosion-proof strip 39, the third explosion-proof strip 40, the fourth explosion-proof strip 41, the fifth explosion-proof strip 42 and the sixth explosion-proof strip 43 on the capacitor assembly formed by 'A', pressing down to make the rectangular barrel cover 28 contact with the upper opening of the rectangular barrel 27, sealing (air-tight) the rectangular barrel cover 28 with the upper opening of the rectangular barrel 27 by using a sealing machine → using an electric iron to seal and weld (air-tight) the parts of the main hole 54 of the first explosion-proof strip 38, the second explosion-proof strip 39, the third explosion-proof strip 40, the fourth explosion-proof strip 41, the fifth explosion-proof strip 42 and the sixth explosion-proof strip 43, which rise out of the external connection terminal 53, with the internal and external connection terminals 53 of the circular pit 56 outside the main hole 54 by using soldering tin.
In the above installation steps, A, B can be reversed in order, and after A, B is completed, C, D can be done.
The double-group three-phase low-voltage power capacitor is reasonable in structure, capacitor coils are in rigid connection through the contact piece of the copper sheet and are finally locked and fixed through the connecting rod, assembly is simple and convenient, then the capacitor coils are connected with the explosion-proof piece through the connecting wire and then connected with the wiring terminal, when explosion occurs in the capacitor, the barrel body expands, so that the two explosion-proof pieces are pulled open to break the explosion-proof strip at the explosion-proof hole to cut off power supply to the capacitor coils, explosion continuation is avoided, and the safe use effect of the power capacitor is improved.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A two-group three-phase low-voltage power capacitor is characterized in that: comprises a first capacitor roll, a second capacitor roll, a third capacitor roll, a fourth capacitor roll, a fifth capacitor roll, a sixth capacitor roll, a first connecting rod, a second connecting rod, a first contact member, a second contact member, a third contact member, a fourth contact member, a fifth contact member, a sixth contact member, a seventh contact member, an eighth contact member, a rectangular barrel cover and an external wiring fixing member, wherein the first contact member, the first capacitor roll, the second contact member, the second capacitor roll, the third contact member, the third capacitor roll and the fourth contact member are sequentially arranged and fixedly connected through the first connecting rod to form a group of three-phase capacitors, the fifth contact member, the fourth capacitor roll, the sixth contact member, the fifth capacitor roll, the seventh contact member, the sixth capacitor roll and the eighth contact member are sequentially arranged and fixedly connected through the second connecting rod to form another group of three-phase capacitors, the two groups of capacitors are arranged in the rectangular barrel, the rectangular barrel cover is arranged on the upper side of the rectangular barrel, and the external wiring fixing piece is arranged on the rectangular barrel cover and is connected with all the contact pieces through the connecting wires;
six external connection terminals are arranged in the external connection fixing piece, the external connection terminals are L-shaped terminals, a main hole and a plurality of auxiliary holes are formed in the horizontal part of the lower end of each external connection terminal, the lower end of each external connection terminal is injected into the external connection fixing piece, a round pit is formed in the position, corresponding to the main hole of each external connection terminal, of the upper side of each external connection fixing piece, the diameter of each round pit is larger than that of the main hole of each external connection terminal, and therefore part of the external connection terminals are exposed; the lower side of the external connection fixing piece is provided with an insulating protective cylinder corresponding to the position of the main hole of the external connection terminal, and the inner diameter of the insulating protective cylinder is not smaller than the diameter of the main hole of the external connection terminal;
the edge of the lower side surface of the external wiring fixing piece is provided with a circle of sealing groove, the sealing piece is clamped in the sealing groove, the lower side of the rectangular barrel cover is provided with a sealing pressure plate, a plurality of sealing nuts are fixed on the lower side of the external wiring fixing piece, through holes corresponding to the sealing nuts of the external wiring fixing piece are formed in the rectangular barrel cover and the sealing pressure plate, and sealing screws penetrate through the through holes of the rectangular barrel cover and the sealing pressure plate and are locked and fixed in the sealing nuts of the external wiring fixing piece; through holes corresponding to the insulating protective barrels are formed in the rectangular barrel cover and the sealing element, and the insulating protective barrels on the external wiring fixing piece penetrate through the corresponding through holes in the rectangular barrel cover and the sealing element; the sealing nut and the insulating protective cylinder on the external wiring fixing piece are both in the range of the sealing groove;
two groups of explosion-proof devices are arranged on the lower side of the sealing pressure plate, each group of explosion-proof devices comprises a first explosion-proof piece and a second explosion-proof piece, a first explosion-proof strip, a second explosion-proof strip and a third explosion-proof strip are arranged on the first group of explosion-proof devices, a fourth explosion-proof strip, a fifth explosion-proof strip and a sixth explosion-proof strip are arranged on the second group of explosion-proof devices, all the explosion-proof strips respectively comprise a bottom end, a short end and a long end, the bottom end is horizontally arranged, the short end and the long end are perpendicular to the bottom end, the lower end of the short end is connected with one end of the bottom end, the lower end of the long end is connected with the other end of the bottom end, explosion-proof holes are formed in the bottom end of at least two explosion-proof strips on each group of explosion-proof devices, the short ends and the long ends of all the explosion-proof strips are respectively connected with the first explosion-proof piece and the second explosion-proof piece, and the short ends and the long ends of two adjacent explosion-proof strips are arranged in a staggered manner; one end of each of the first connecting line, the second connecting line, the third connecting line and the fourth connecting line is connected with the welding end of each of the first contact element, the second contact element, the third contact element and the fourth contact element respectively, the other end of each of the first connecting line, the second connecting line and the third connecting line is connected with the short end of each of the first explosion-proof strip, the second explosion-proof strip and the third explosion-proof strip of the first group of explosion-proof devices respectively, and the other end of the fourth connecting line is connected with the short end of the first explosion-proof strip; one end of the fifth connecting line, one end of the sixth connecting line, one end of the seventh connecting line and one end of the eighth connecting line are connected with the welding ends of the fifth contact element, the sixth contact element, the seventh contact element and the eighth contact element respectively, the other ends of the fifth connecting line, the sixth connecting line and the seventh connecting line are connected with the short ends of the fourth explosion-proof strip, the fifth explosion-proof strip and the sixth explosion-proof strip of the second group of explosion-proof devices respectively, and the other end of the eighth connecting line is connected with the short end of the fourth explosion-proof strip.
2. A two-pack type three-phase low voltage power capacitor as claimed in claim 1, wherein: the first contact element, the second contact element, the third contact element, the fourth contact element, the fifth contact element, the sixth contact element, the seventh contact element and the eighth contact element comprise copper sheets, center holes, welding ends, contact holes and sharp objects, the contact holes are uniformly distributed on the copper sheets, the sharp objects of the first contact element, the fourth contact element, the fifth contact element and the eighth contact element are all located on one sides of the copper sheets, the sharp objects of the second contact element, the third contact element, the sixth contact element and the seventh contact element are located on two sides of the copper sheets, each contact hole is correspondingly provided with at least two sharp objects, the sharp objects of the same contact hole face the same direction, the center holes are located in the centers of the copper sheets, and the welding ends are arranged on the copper sheets and arranged on the outer edges of the copper sheets.
3. A two-pack type three-phase low voltage power capacitor as claimed in claim 2, wherein: the contact holes of the first contact element, the second contact element, the third contact element, the fourth contact element, the fifth contact element, the sixth contact element, the seventh contact element and the eighth contact element are not less than four, and the sharp object on the inner side of each contact hole is not less than two.
4. A two-pack type three-phase low voltage power capacitor as claimed in claim 1, wherein: one end of the first connecting rod is fixed on the first fixing clamp plate through the first fixing rod head clamping, the other end of the first connecting rod is fixed on the second fixing clamp plate through the first fixing nut in a locking mode, one end of the second connecting rod is fixed on the first fixing clamp plate through the second fixing rod head clamping, and the other end of the second connecting rod is fixed on the second fixing clamp plate through the second fixing nut in a locking mode.
5. A two-pack type three-phase low voltage power capacitor as claimed in claim 1, wherein: the long ends of the six explosion-proof bars penetrate into the corresponding six insulating protective barrels, the insulating protective barrels sequentially penetrate through the through holes in the rectangular barrel cover and the through holes in the sealing pressing plate, and the long ends of the explosion-proof bars penetrate out of the main holes of the external wiring terminals and are fixed with the external wiring terminals in a soldering mode at round pits in the external wiring fixing piece.
6. A two-pack type three-phase low voltage power capacitor as claimed in claim 1, wherein: the downside of the first group of explosion-proof equipment is provided with two and colludes the piece, and the downside of the second group of explosion-proof equipment is provided with two and colludes the piece, and the inner wall upper end of the long limit both sides of rectangle bucket is provided with the inserts that match with explosion-proof equipment colludes the piece, and first group of explosion-proof equipment and the second group of explosion-proof equipment are fixed in the inserts in the rectangle bucket through colluding the piece.
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| CN202011515159.9A CN112563028B (en) | 2020-12-21 | 2020-12-21 | Double-group type three-phase low-voltage power capacitor |
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| CN202011515159.9A CN112563028B (en) | 2020-12-21 | 2020-12-21 | Double-group type three-phase low-voltage power capacitor |
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Effective date of registration: 20220822 Address after: No. 1188, Yonghe Road, Yongxing Street, Chongchuan District, Nantong City, Jiangsu Province, 226000 Patentee after: Jiangsu Huazheng Electric Co.,Ltd. Address before: No.1188, Yonghe Road, Nantong City, Jiangsu Province, 226000 Patentee before: JIANGSU MODERN ELECTRIC TECHNOLOGY Co.,Ltd. |