CN112003147B - Power transformer for voltage conversion output - Google Patents
Power transformer for voltage conversion output Download PDFInfo
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- CN112003147B CN112003147B CN202010881487.4A CN202010881487A CN112003147B CN 112003147 B CN112003147 B CN 112003147B CN 202010881487 A CN202010881487 A CN 202010881487A CN 112003147 B CN112003147 B CN 112003147B
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- box body
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- cover plate
- sliding rods
- clamping
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/52—Mobile units, e.g. for work sites
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/46—Boxes; Parts thereof or accessories therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
- H02B1/565—Cooling; Ventilation for cabinets
Abstract
The invention provides a power transformer for voltage conversion output, relates to the technical field of welding machine transformers, and solves the problem that the disassembly and assembly efficiency of a cover plate cannot be improved under the condition of ensuring sealing through structural improvement; the wire holder structure does not have an automatic locking function, and the cable is easy to fall off when the cable is dragged unintentionally; the radiating problem of the inside components and parts of box can not be realized in the linkage on the basis of realizing the absorbing. A power transformer for voltage conversion output includes a case; the box body is provided with a roller structure, the box body is internally provided with a heat dissipation structure, and a cover plate is fixed on the box body. The cover plate is in a cover-shaped structure, and a groove is formed in the rear side position of the bottom end face of the cover plate; the groove is of a semicircular groove structure, and the groove forms a rainwater intercepting structure of the cover plate, so that a circuit short circuit caused by the fact that the bottom end face of the cover plate slides into the box body can be prevented.
Description
Technical Field
The invention belongs to the technical field of welding machine transformers, and particularly relates to a power transformer for voltage conversion output.
Background
At present, in more countries in Africa, due to historical reasons, public power distribution systems adopt two voltage grades of 10kV and 6.6KV and coexist as main power distribution voltages, so that the output voltages of the intermediate transformer are 10kV and 6.6KV, in order to save cost, two voltages of 10kV and 6.6KV output at low voltage need to be designed, and a welding machine transformer is one of power transformers for voltage conversion output.
As in application No.: the invention discloses a CN200710133191.9, relating to an arc welding machine transformer, characterized in that: secondary coils are arranged above and below the neutral bar, primary coil upper and primary coil lower parts are respectively arranged above and below the secondary coils, fastening screws penetrate through the primary coil upper parts, the secondary coils and the primary coil lower parts for fixation, then a main transformer upper pressing plate and a main transformer lower pressing plate are arranged, tail wires on each group of primary coils and under the primary coils are connected, heads on each group of primary coils and under the primary coils are respectively connected for three-phase input, and lead wires of the secondary coils are fixed by output terminals; the secondary coil adopts four groups of secondary coils which are arranged on one group of core column and are connected in parallel two by two to form two groups of outputs, and the other two groups are the same. The invention has strong bearing capacity and large impact current resistance, and is not easy to burn due to overload; the fastening force is strong, the coil is not easy to loosen, the whole structure is compact, the ventilation capacity is strong, and a good ventilation channel in the whole welding machine is ensured.
Similar to the transformer of the welder in the above application, the following disadvantages still exist:
one is that most cover plates of the existing devices are inconvenient to disassemble and maintain by being fixed by a plurality of bolts, and the disassembly and assembly efficiency of the cover plates cannot be improved under the condition of ensuring sealing through structural improvement; moreover, the wire holder structure of the existing device does not have an automatic locking function, and the cable is easy to fall off when the cable is dragged unintentionally; finally, although the existing device can realize the buffering and damping by arranging the spring on the universal wheel, the existing device cannot realize the heat dissipation of the components inside the box body in a linkage manner on the basis of realizing the damping.
Therefore, in view of the above, research and improvement are made on the existing structure and defects, and a power transformer for voltage conversion output is provided, so as to achieve the purpose of higher practical value.
Disclosure of Invention
In order to solve the technical problems, the invention provides a power transformer for voltage conversion output, which aims to solve the problems that the existing device is inconvenient to disassemble and maintain due to the fact that most of cover plates are fixed by a plurality of bolts, and the disassembly and assembly efficiency of the cover plates cannot be improved under the condition of ensuring sealing through structural improvement; moreover, the wire holder structure of the existing device does not have an automatic locking function, and the cable is easy to fall off when the cable is dragged unintentionally; finally, although the existing device can realize the buffer and shock absorption by arranging the spring on the universal wheel, the existing device cannot realize the heat dissipation of the components inside the box body in a linkage manner on the basis of realizing the shock absorption.
The invention relates to a power transformer for voltage conversion output, which is realized by the following specific technical means:
a power transformer for voltage conversion output includes a case; the roller structure is arranged on the box body, the heat dissipation structure is arranged in the box body, and the cover plate is fixed on the box body; the box body is provided with a wiring structure, a cable plug is inserted into the wiring structure, and the box body is welded with a rainproof structure; the heat dissipation structure comprises four rotating shafts, four blades and gears, the four rotating shafts are rotatably connected to the box body, and each rotating shaft is provided with one blade; every is all installed a gear in the pivot, and four gears with respectively with four tooth row intermeshing, the blade is reciprocating rotation state when the rectangle slide bar slides flexible in the meshing process.
Furthermore, the box body comprises clamping grooves, two clamping grooves are symmetrically formed in the top end face of the box body, and the clamping grooves are of a trapezoidal groove-shaped structure; the cover plate comprises clamping bulges, two clamping bulges are symmetrically welded on the bottom end surface of the cover plate, and the clamping bulges are in a trapezoidal block structure; the clamping protrusion is matched with the clamping groove, and the clamping protrusion and the clamping groove jointly form an auxiliary fixing structure.
Furthermore, the box body also comprises a fastening bolt, and the box body is in threaded connection with the fastening bolt; the cover plate further comprises a thread groove, the bottom end face of the cover plate is provided with the thread groove, and the thread groove is aligned with the fastening bolt after the cover plate is clamped with the clamping groove through the clamping protrusion.
Furthermore, the roller structure comprises four rectangular sliding rods, universal wheels, a baffle, an elastic part A and a tooth row, wherein the four rectangular sliding rods are connected to the box body in a sliding manner, and the bottom end faces of the four rectangular sliding rods are welded with the universal wheels; a baffle is welded on each of the four rectangular sliding rods, and a tooth row is welded on each of the four rectangular sliding rods; and the four rectangular sliding rods are respectively sleeved with an elastic piece A, and the elastic pieces A form an elastic damping structure of the universal wheel.
Furthermore, the cover plate is of a cover-shaped structure, and a groove is formed in the rear side position of the bottom end face of the cover plate; the groove is of a semicircular groove-shaped structure, and the groove forms a rainwater intercepting structure of the cover plate.
Furthermore, the wiring structure comprises a wiring seat, sliding rods, a fixed plate and an elastic piece B, wherein the wiring seat is installed on the left end face of the box body, the two sliding rods are welded on the top end face of the wiring seat, and the two sliding rods are connected with the fixed plate in an L-shaped structure in a sliding mode; an elastic piece B is sleeved on each of the two sliding rods, and the two elastic pieces B jointly form an elastic pressing structure of the fixing plate.
Further, the cable conductor plug includes the draw-in groove, the cable conductor plug is equipped with two altogether, and has all seted up a draw-in groove on two cable conductor plugs to be the joint shutting state with the draw-in groove when cable conductor plug and connection terminal grafting back fixed plate.
Furthermore, the rainproof structure comprises a rainproof plate A and a rainproof plate B, the rainproof plate A is provided with two rainproof plates, and the two rainproof plates A are both rectangular plate-shaped structures; the two rain-proof plates A are welded on the left end face of the box body and are respectively positioned at the front side and the rear side of the wiring structure; the flashing B is welded on the flashing A and is of an L-shaped structure.
Compared with the prior art, the invention has the following beneficial effects:
the fixing structure of the cover plate is improved, firstly, two clamping bulges are symmetrically welded on the bottom end surface of the cover plate, and the clamping bulges are in a trapezoidal block structure; the clamping protrusion is matched with the clamping groove, and the clamping protrusion and the clamping groove jointly form an auxiliary fixing structure; secondly, a thread groove is formed in the bottom end face of the cover plate, and the thread groove and the fastening bolt are aligned with each other after the cover plate is clamped with the clamping groove through the clamping protrusion, so that the convenience of fixing the cover plate thread can be improved; thirdly, the cover plate is in a cover-shaped structure, and a groove is formed in the rear side position of the bottom end face of the cover plate; the groove is of a semicircular groove structure, and the groove forms a rainwater intercepting structure of the cover plate, so that a circuit short circuit caused by the fact that the bottom end face of the cover plate slides into the box body can be prevented.
The structure of the idler wheel is improved, firstly, a baffle is welded on each of the four rectangular sliding rods, and a tooth row is welded on each of the four rectangular sliding rods; an elastic piece A is sleeved on each of the four rectangular sliding rods, and the elastic pieces A form an elastic damping structure of the universal wheel; secondly, as each rotating shaft is provided with one gear, and the four gears are respectively meshed with the four gear rows, the blades are in a reciprocating rotation state when the rectangular sliding rods slide and stretch in the meshing process, so that the heat dissipation of electrical elements in the box body is realized;
the wire holder structure is improved, firstly, the wire holder is arranged on the left end face of the box body, two sliding rods are welded on the top end face of the wire holder, and a fixing plate of an L-shaped structure is connected on the two sliding rods in a sliding manner; the two sliding rods are sleeved with an elastic part B, and the two elastic parts B jointly form an elastic pressing structure of the fixing plate; and secondly, two cable plugs are arranged, a clamping groove is formed in each of the two cable plugs, and the cable plugs are connected with the wire holder in an inserting mode, and the fixing plate and the clamping groove are in a clamping locking state.
Drawings
Fig. 1 is a schematic axial view of the present invention.
Fig. 2 is a schematic view of the present invention in an axially disassembled configuration.
Fig. 3 is an enlarged schematic view of fig. 2 at a.
Fig. 4 is a schematic axial view of the present invention in another direction as shown in fig. 2.
Fig. 5 is an enlarged view of the structure of fig. 4B according to the present invention.
Fig. 6 is an enlarged view of the structure of fig. 4C according to the present invention.
Fig. 7 is a schematic axial view of the cover plate of the present invention.
Fig. 8 is an enlarged view of fig. 7D according to the present invention.
In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:
1. a box body; 101. a clamping groove; 102. fastening a bolt; 2. a roller structure; 201. a rectangular slide bar; 202. a universal wheel; 203. a baffle plate; 204. an elastic member A; 205. a tooth row; 3. a heat dissipation structure; 301. a rotating shaft; 302. a blade; 303. a gear; 4. a cover plate; 401. clamping the bulges; 402. a thread groove; 403. a groove; 5. a wiring structure; 501. a wire holder; 502. a slide bar; 503. a fixing plate; 504. an elastic member B; 6. a cable plug; 601. a card slot; 7. a rain-proof structure; 701. a flashing board A; 702. and a rain guard B.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in figures 1 to 8:
the invention provides a power transformer for voltage conversion output, which comprises a box body 1; the roller structure 2 is arranged on the box body 1, the heat dissipation structure 3 is arranged in the box body 1, and the cover plate 4 is fixed on the box body 1; a wiring structure 5 is arranged on the box body 1, a cable plug 6 is inserted into the wiring structure 5, and a rainproof structure 7 is welded on the box body 1; referring to fig. 4 and 5, the heat dissipation structure 3 includes four rotating shafts 301, four blades 302 and a gear 303, the four rotating shafts 301 are rotatably connected to the box 1, and each rotating shaft 301 is provided with one blade 302; every pivot 301 is last all to be installed a gear 303, and four gears 303 with respectively with four tooth rows 205 intermeshing, blade 302 is reciprocating rotation state when rectangle slide bar 201 slides flexible in the meshing process to the heat dissipation of electrical components in box 1 has been realized.
Referring to fig. 2, fig. 3 and fig. 4, the box body 1 includes two clamping grooves 101, two clamping grooves 101 are symmetrically formed on the top surface of the box body 1, and the clamping grooves 101 are in a trapezoid groove-shaped structure; the cover plate 4 comprises clamping protrusions 401, two clamping protrusions 401 are symmetrically welded on the bottom end face of the cover plate 4, and the clamping protrusions 401 are of a trapezoidal block structure; the clamping protrusion 401 is matched with the clamping groove 101, and the clamping protrusion 401 and the clamping groove 101 together form an auxiliary fixing structure.
Referring to fig. 7 and 8, the case 1 further includes a fastening bolt 102, and one fastening bolt 102 is threadedly coupled to the case 1; the cover plate 4 further comprises a thread groove 402, the bottom end face of the cover plate 4 is provided with the thread groove 402, and the thread groove 402 is aligned with the fastening bolt 102 after the cover plate 4 is completely clamped with the clamping groove 101 through the clamping protrusion 401, so that the convenience of fixing the threads of the cover plate 4 can be improved.
Referring to fig. 4 and 5, the roller structure 2 includes four rectangular sliding rods 201, universal wheels 202, a baffle 203, an elastic member a204 and a tooth row 205, the number of the rectangular sliding rods 201 is four, the four rectangular sliding rods 201 are slidably connected to the box body 1, and the universal wheels 202 are welded to the bottom end faces of the four rectangular sliding rods 201; a baffle 203 is welded on each of the four rectangular sliding rods 201, and a tooth row 205 is welded on each of the four rectangular sliding rods 201; an elastic piece A204 is sleeved on each of the four rectangular sliding rods 201, and the elastic pieces A204 form an elastic damping structure of the universal wheel 202.
Referring to fig. 2 and 3, the cover plate 4 is a cover-shaped structure, and a groove 403 is formed at a rear position of a bottom end surface of the cover plate 4; the groove 403 is in a semicircular groove shape, and the groove 403 constitutes a rainwater intercepting structure of the cover plate 4, so that a short circuit caused by sliding into the box body 1 through the bottom end surface of the cover plate 4 can be prevented.
Referring to fig. 4 and 6, the wiring structure 5 includes a wire holder 501, a sliding rod 502, a fixing plate 503 and an elastic member B504, the wire holder 501 is installed on the left end face of the box body 1, two sliding rods 502 are welded on the top end face of the wire holder 501, and the fixing plate 503 with an L-shaped structure is slidably connected on the two sliding rods 502; the two sliding rods 502 are sleeved with an elastic member B504, and the two elastic members B504 form an elastic pressing structure of the fixing plate 503.
Referring to fig. 6, the cable plug 6 includes two clamping slots 601, two cable plugs 6 are provided, and two cable plugs 6 are both provided with one clamping slot 601, and after the cable plugs 6 are inserted into the wire holder 501, the fixing plate 503 and the clamping slots 601 are in a clamping and locking state.
Referring to fig. 6, the rainproof structure 7 includes two rainproof plates a701 and a rainproof plate B702, the rainproof plate a701 is provided with two rainproof plates a701, and the two rainproof plates a701 are both rectangular plate-shaped structures; the two rain-proof plates A701 are welded on the left end face of the box body 1, and the two rain-proof plates A701 are respectively positioned at the front side and the rear side of the wiring structure 5; the flashing B702 is welded to the flashing a701, and the flashing B702 is in an L-shaped structure, so that short circuit caused by rainwater permeating into the wiring structure 5 through the bottom end face of the flashing B702 can be prevented.
The specific use mode and function of the embodiment are as follows:
when the cover plate 4 is disassembled and assembled, firstly, two clamping bulges 401 are symmetrically welded on the bottom end surface of the cover plate 4, and the clamping bulges 401 are in a trapezoidal block structure; the clamping protrusion 401 is matched with the clamping groove 101, and the clamping protrusion 401 and the clamping groove 101 form an auxiliary fixing structure together; secondly, the bottom end face of the cover plate 4 is provided with a thread groove 402, and after the cover plate 4 is clamped with the clamping groove 101 through the clamping protrusion 401, the thread groove 402 is aligned with the fastening bolt 102, so that the convenience of fixing the thread of the cover plate 4 can be improved; thirdly, the cover plate 4 is in a cover-shaped structure, and a groove 403 is formed in the rear side position of the bottom end face of the cover plate 4; the groove 403 is in a semicircular groove structure, and the groove 403 forms a rainwater interception structure of the cover plate 4, so that a circuit short circuit caused by sliding into the box body 1 through the bottom end face of the cover plate 4 can be prevented;
in the meshing process, firstly, a baffle 203 is welded on each of the four rectangular sliding rods 201, and a tooth row 205 is welded on each of the four rectangular sliding rods 201; an elastic piece A204 is sleeved on each of the four rectangular sliding rods 201, and the elastic pieces A204 form an elastic damping structure of the universal wheel 202; secondly, as each rotating shaft 301 is provided with one gear 303, and the four gears 303 are meshed with the four gear rows 205 respectively, the blades 302 rotate in a reciprocating manner when the rectangular sliding rod 201 slides and stretches in the meshing process, so that heat dissipation of electrical elements in the box body 1 is realized;
when the cable plug 6 is connected, firstly, the wire holder 501 is installed on the left end face of the box body 1, two sliding rods 502 are welded on the top end face of the wire holder 501, and the two sliding rods 502 are connected with a fixing plate 503 with an L-shaped structure in a sliding manner; the two sliding rods 502 are sleeved with an elastic piece B504, and the two elastic pieces B504 form an elastic pressing structure of the fixing plate 503; secondly, because of cable conductor plug 6 is equipped with two altogether, and all seted up a draw-in groove 601 on two cable conductor plugs 6 to after cable conductor plug 6 pegs graft with connection terminal 501 fixed plate 503 is the joint shutting state with draw-in groove 601.
The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (5)
1. A power transformer for voltage conversion output, characterized by: comprises a box body (1); the roller structure (2) is installed on the box body (1), the heat dissipation structure (3) is installed in the box body (1), and the cover plate (4) is fixed on the box body (1); the box body (1) is provided with a wiring structure (5), a cable plug (6) is inserted into the wiring structure (5), and the box body (1) is welded with a rainproof structure (7);
the box body (1) comprises clamping grooves (101), two clamping grooves (101) are symmetrically formed in the top end face of the box body (1), and the clamping grooves (101) are of a trapezoidal groove-shaped structure;
the cover plate (4) comprises clamping protrusions (401), two clamping protrusions (401) are symmetrically welded on the bottom end face of the cover plate (4), and the clamping protrusions (401) are of a trapezoidal block structure; the clamping protrusion (401) is matched with the clamping groove (101), and the clamping protrusion (401) and the clamping groove (101) jointly form an auxiliary fixing structure;
the roller structure (2) comprises rectangular sliding rods (201), universal wheels (202), a baffle (203), an elastic piece A (204) and a tooth row (205), wherein the number of the rectangular sliding rods (201) is four, the four rectangular sliding rods (201) are all connected to the box body (1) in a sliding mode, and the universal wheels (202) are welded to the bottom end faces of the four rectangular sliding rods (201); a baffle (203) is welded on each of the four rectangular sliding rods (201), and a tooth row (205) is welded on each of the four rectangular sliding rods (201); an elastic piece A (204) is sleeved on each of the four rectangular sliding rods (201), and the elastic pieces A (204) form an elastic shock absorption structure of the universal wheel (202);
the heat dissipation structure (3) comprises four rotating shafts (301), four blades (302) and gears (303), the four rotating shafts (301) are rotatably connected to the box body (1), and each rotating shaft (301) is provided with one blade (302); each rotating shaft (301) is provided with a gear (303), the four gears (303) are respectively meshed with the four tooth rows (205), and the blades (302) are in a reciprocating rotation state when the rectangular sliding rod (201) slides and stretches in the meshing process;
the wiring structure (5) comprises a wiring seat (501), sliding rods (502), a fixing plate (503) and an elastic piece B (504), wherein the wiring seat (501) is installed on the left end face of the box body (1), the two sliding rods (502) are welded on the top end face of the wiring seat (501), and the fixing plate (503) of an L-shaped structure is connected onto the two sliding rods (502) in a sliding mode; an elastic piece B (504) is sleeved on each of the two sliding rods (502), and the two elastic pieces B (504) jointly form an elastic compression structure of the fixing plate (503).
2. A power transformer for a voltage conversion output according to claim 1, characterized by: the box body (1) further comprises a fastening bolt (102), and the fastening bolt (102) is connected to the box body (1) in a threaded mode; the cover plate (4) further comprises a thread groove (402), the bottom end face of the cover plate (4) is provided with the thread groove (402), and the thread groove (402) is aligned with the fastening bolt (102) after the cover plate (4) is completely clamped with the clamping groove (101) through the clamping protrusion (401).
3. A power transformer for a voltage conversion output according to claim 1, characterized by: the cover plate (4) is of a cover-shaped structure, and a groove (403) is formed in the rear side position of the bottom end face of the cover plate (4); the groove (403) is of a semicircular groove-shaped structure, and the groove (403) forms a rainwater intercepting structure of the cover plate (4).
4. A power transformer for a voltage conversion output according to claim 1, characterized by: cable conductor plug (6) are including draw-in groove (601), cable conductor plug (6) are equipped with two altogether, and have all seted up a draw-in groove (601) on two cable conductor plugs (6) to be joint shutting state when cable conductor plug (6) and wire holder (501) grafting after-fixing board (503) and draw-in groove (601).
5. A power transformer for a voltage conversion output according to claim 1, characterized by: the rainproof structure (7) comprises a rainproof plate A (701) and a rainproof plate B (702), the rainproof plate A (701) is provided with two rainproof plates, and the two rainproof plates A (701) are both rectangular plate-shaped structures; the two rain-proof plates A (701) are welded on the left end face of the box body (1), and the two rain-proof plates A (701) are respectively positioned at the front side and the rear side of the wiring structure (5); the flashing B (702) is welded on the flashing A (701), and the flashing B (702) is of an L-shaped structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010881487.4A CN112003147B (en) | 2020-08-28 | 2020-08-28 | Power transformer for voltage conversion output |
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| CN202010881487.4A CN112003147B (en) | 2020-08-28 | 2020-08-28 | Power transformer for voltage conversion output |
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| CN112003147B true CN112003147B (en) | 2022-07-01 |
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Effective date of registration: 20220610 Address after: 723000 south of Chencang Road (Daba Village), Hantai District (North District of Economic Development Zone), Hanzhong City, Shaanxi Province Applicant after: Shaanxi Hanzhong Transformer Co.,Ltd. Address before: 050501 Nan Zhai Xiang Qiu Shan Cun, Lingshou County, Shijiazhuang City, Hebei Province Applicant before: Liang Guoli |
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