CN109256705B - Effectual high voltage distribution cabinet of shock attenuation - Google Patents

Effectual high voltage distribution cabinet of shock attenuation Download PDF

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Publication number
CN109256705B
CN109256705B CN201811333342.XA CN201811333342A CN109256705B CN 109256705 B CN109256705 B CN 109256705B CN 201811333342 A CN201811333342 A CN 201811333342A CN 109256705 B CN109256705 B CN 109256705B
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CN
China
Prior art keywords
fixedly connected
plate
block
movable
cabinet body
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CN201811333342.XA
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Chinese (zh)
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CN109256705A (en
Inventor
吴宗泽
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
YUEQING WENBAO ELECTRONIC ELECTRICAL Co.,Ltd.
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Yueqing Wenbao Electronic Electrical Co ltd
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Priority to CN201811333342.XA priority Critical patent/CN109256705B/en
Publication of CN109256705A publication Critical patent/CN109256705A/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/54Anti-seismic devices or installations
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26Casings; Parts thereof or accessories therefor
    • H02B1/30Cabinet-type casings; Parts thereof or accessories therefor

Abstract

The invention discloses a high-voltage power distribution cabinet with a good damping effect, which comprises a cabinet body, wherein a partition plate is fixedly connected to the inner wall of the cabinet body, an instrument mounting plate is fixedly connected to the inner wall of the rear side of the cabinet body and positioned below the partition plate, a protective shell is arranged below the cabinet body, a movable block is fixedly connected to the bottom of the cabinet body, and the bottom of the movable block penetrates through the protective shell and extends into the protective shell. According to the high-voltage power distribution cabinet, the protective shell, the movable block, the movable column, the limiting sliding groove block, the sliding plate, the movable block, the spring fixing plate, the telescopic rod, the movable plate, the transverse spring, the limiting baffle, the first vertical spring, the top block, the supporting plate, the second vertical spring, the supporting block, the impact groove, the sliding rail, the sliding block and the elastic belt are arranged, so that the damping effect of the high-voltage power distribution cabinet is better, the power distribution cabinet and internal instruments of the power distribution cabinet are prevented from being damaged, unnecessary economic damage is avoided, safety accidents are reduced, and great convenience is brought to users.

Description

Effectual high voltage distribution cabinet of shock attenuation
Technical Field
The invention relates to the technical field of high-voltage electric appliances, in particular to a high-voltage power distribution cabinet with a good damping effect.
Background
Switch board (case) transfer power switch board (case) and illumination switch board (case), measurement cabinet (case), be distribution system's final stage equipment, the switch board is motor control center's collective name, it is used more at load ratio dispersion, the less occasion in return circuit, each electric elements and circuit in the switch board should contact well, connect reliably, must not have serious generating heat, the phenomenon of scaling loss, the door of switch board should be intact, the lock should be kept by the special person, at the in-process that uses high-voltage distribution cabinet, common high-voltage distribution cabinet's shock attenuation effect is unsatisfactory, not only switch board itself often damages because the vibrations that various social activities produced, lead to the emergence of incident easily, seriously threaten people's life safety, but also lead to switch board internal apparatus to damage easily, produce unnecessary economic loss, bring very big inconvenience for the user.
Disclosure of Invention
The invention aims to provide a high-voltage power distribution cabinet with a good damping effect, which has the advantage of good damping effect and solves the problem that the damping effect of a common high-voltage power distribution cabinet is not ideal.
In order to achieve the purpose, the invention provides the following technical scheme: a high-voltage power distribution cabinet with good damping effect comprises a cabinet body, wherein a partition plate is fixedly connected to the inner wall of the cabinet body, an instrument mounting plate is fixedly connected to the inner wall of the rear side of the cabinet body and is positioned below the partition plate, a protective shell is arranged below the cabinet body, a movable block is fixedly connected to the bottom of the cabinet body, the bottom of the movable block penetrates through the protective shell and extends into the protective shell, movable columns are fixedly connected to the front side and the rear side of the bottom of the movable block, limiting sliding groove blocks are fixedly connected to the inner walls of the left side and the right side of the protective shell, sliding plates are movably connected in grooves of the limiting sliding groove blocks, which are close to one sides of the movable columns, moving blocks are fixedly connected to one sides of the sliding plates, which are close to the movable columns, a limiting sliding groove block penetrates through the limiting sliding groove blocks and extends to the, the four telescopic rods are fixedly connected through a movable plate, a transverse spring is sleeved on the surface of each telescopic rod, one side, away from the movable plate, of the transverse spring is fixedly connected with a spring fixing plate, one side, away from the spring fixing plate, of the transverse spring is fixedly connected with the movable plate, the bottom of each movable column penetrates through the movable plate and extends to the outside of the movable column, a limiting baffle is fixedly connected with the movable column, a first vertical spring is sleeved on the surface of each movable column and is positioned between the movable block and the movable plate, the top of the first vertical spring is fixedly connected with the bottom of the movable block, the bottom of the first vertical spring is fixedly connected with the top of the movable plate, the bottom of the limiting baffle is fixedly connected with a top block, supporting plates are fixedly connected on the inner walls of the left side and the right side of the protective shell and above the limiting sliding groove block, the top of the second vertical spring is fixedly connected with a supporting block, the bottom of the movable block is fixedly connected with an impact block corresponding to the position of the supporting block, the top of the supporting block is provided with an impact groove matched with the impact block at a position corresponding to the impact block, the inner walls at the front side and the rear side of the protective shell are fixedly connected with slide rails at positions corresponding to the movable plates, the surface of the slide rail is connected with a slide block in a sliding way, one side of the slide block close to the movable plate is fixedly connected with an elastic belt, the two elastic belts are fixedly connected through the movable plate, the front side of the top of the cabinet body is fixedly connected with a bearing, the inner wall of the bearing is fixedly connected with a rotating block, the top end of the rotating block penetrates through the bearing and extends to the outside of the rotating block to be fixedly connected with a connecting transverse plate, the front side of the bottom of the connecting transverse plate is fixedly connected with a cabinet door rotating shaft, the cabinet door is fixedly connected to the surface of the cabinet door rotating shaft, and the front side of the cabinet door is fixedly connected with a rotating handle.
Preferably, the top and the bottom of the rotating handle are both fixedly connected with reinforcing rods, and one side of each reinforcing rod, which is far away from the rotating handle, is fixedly connected with the cabinet door.
Preferably, the equal fixedly connected with transport handle in top of the protective housing left and right sides, one side fixedly connected with gag lever post of protective housing is kept away from to transport handle bottom, one side and protective housing fixed connection that transport handle was kept away from to the gag lever post.
Preferably, the middle point of the top of the supporting plate is fixedly connected with an anti-toppling plate, and one side of the anti-toppling plate, which is far away from the supporting plate, is fixedly connected with the protective shell.
Preferably, the top of both sides inner wall is the fixed connection and prevents bumping the piece around the protective housing, one side fixedly connected with of preventing bumping the piece and being close to the movable block prevents the fender.
Preferably, the left side and the right side of the protective shell are fixedly connected with supporting connecting plates, and the supporting connecting plates are fixedly connected with placing plates far away from one side of the protective shell.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the high-voltage power distribution cabinet, the protective shell, the movable block, the movable column, the limiting sliding groove block, the sliding plate, the movable block, the spring fixing plate, the telescopic rod, the movable plate, the transverse spring, the limiting baffle, the first vertical spring, the top block, the supporting plate, the second vertical spring, the supporting block, the impact groove, the sliding rail, the sliding block and the elastic belt are arranged, so that the damping effect of the high-voltage power distribution cabinet is better, the power distribution cabinet and internal instruments of the power distribution cabinet are prevented from being damaged, unnecessary economic damage is avoided, safety accidents are reduced, and great convenience is brought to users.
2. According to the high-voltage power distribution cabinet, the reinforcing rods are arranged to prevent the rotating handle from being damaged due to repeated use, the carrying handle and the limiting rods are arranged to facilitate the carrying of the high-voltage power distribution cabinet by workers, the anti-tilting plate is arranged to prevent the supporting plate from tilting due to the fact that the supporting plate bears the pressure of a larger spring, the anti-collision block and the anti-collision pad are arranged to prevent the movable block from violently colliding with the protective shell, so that the protective shell is damaged, and the supporting connecting plate and the placing plate are arranged to enable the whole high-voltage power distribution cabinet to be more stably placed.
Drawings
FIG. 1 is a structural cross-sectional view in elevation of the present invention;
FIG. 2 is an enlarged view of a portion of A-A of FIG. 1 in accordance with the present invention;
FIG. 3 is a structural cross-sectional view of the right side view of the present invention;
FIG. 4 is a partial enlarged view of B-B of FIG. 3 according to the present invention.
In the figure: the cabinet comprises a cabinet body 1, a partition plate 2, an instrument mounting plate 3, a protective shell 4, a movable block 5, a movable column 6, a limiting sliding groove block 7, a sliding plate 8, a movable block 9, a spring fixing plate 10, a telescopic rod 11, a movable plate 12, a transverse spring 13, a limiting baffle 14, a first vertical spring 15, a top block 16, a supporting plate 17, a second vertical spring 18, a supporting block 19, an impact block 20, an impact groove 21, a sliding rail 22, a sliding block 23, an elastic belt 24, a bearing 25, a rotating block 26, a transverse connecting plate 27, a cabinet door rotating shaft 28, a cabinet door 29, a rotating handle 30, a reinforcing rod 31, a carrying handle 32, a limiting rod 33, an anti-toppling plate 34, an anti-bumping block 35, an anti-bumping pad 36, a supporting connecting plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a high voltage distribution cabinet with good damping effect comprises a cabinet body 1, a partition plate 2 is fixedly connected to the inner wall of the cabinet body 1, an instrument mounting plate 3 is fixedly connected to the inner wall of the rear side of the cabinet body 1 and below the partition plate 2, a protective shell 4 is arranged below the cabinet body 1, carrying handles 32 are fixedly connected to the tops of the left side and the right side of the protective shell 4, a limiting rod 33 is fixedly connected to one side of the bottom of the carrying handle 32, which is far away from the protective shell 4, a side of the limiting rod 33, which is far away from the carrying handle 32, is fixedly connected with the protective shell 4, the carrying handles 32 and the limiting rod 33 are arranged to facilitate a worker to carry the high voltage distribution cabinet, supporting connecting plates 37 are fixedly connected to the left side and the right side of the protective shell 4, a placing plate 38 is fixedly connected to one side of the supporting connecting plates, the bottom of the cabinet body 1 is fixedly connected with a movable block 5, the tops of the inner walls of the front side and the rear side of the protective shell 4 are fixedly connected with anti-collision blocks 35, one side of each anti-collision block 35, which is close to the corresponding movable block 5, is fixedly connected with an anti-collision pad 36, the movable block 5 and the protective shell 4 are prevented from violently colliding by the arrangement of the anti-collision blocks 35 and the anti-collision pads 36, so that the protective shell 4 is damaged, the bottom of each movable block 5 penetrates through the protective shell 4 and extends into the protective shell, the front side and the rear side of the bottom of each movable block 5 are fixedly connected with movable columns 6, the inner walls of the left side and the right side of the protective shell 4 are fixedly connected with limiting sliding groove blocks 7, the sliding plates 8 are movably connected in grooves of the limiting sliding groove blocks 7, which are close to the movable columns 6, the movable blocks 9 are fixedly, two telescopic rods 11 are symmetrically arranged on one side of the spring fixing plate 10 far away from the limiting sliding groove block 7, the four telescopic rods 11 are fixedly connected through a movable plate 12, the limiting sliding groove block 7, a sliding plate 8 and a moving block 9 are arranged, so that the spring fixing plate 10 can move back and forth, the telescopic rods 11 can move back and forth, a transverse spring 13 is sleeved on the surface of each telescopic rod 11, when the cabinet body 1 vibrates left and right, the cabinet body 1 drives the movable column 6 to vibrate left and right through the movable block 5, the movable column 6 compresses the telescopic rods 11 and the transverse spring 13 through the movable plate 12, the adverse effect of the left and right vibration of the cabinet body 1 on a power distribution cabinet is reduced, one side of the transverse spring 13 far away from the movable plate 12 is fixedly connected with the spring fixing plate 10, one side of the transverse spring 13 far away from the spring fixing plate 10 is fixedly connected with the, the movable plate 12 is prevented from being separated from the movable column 6 by arranging the limiting baffle plate 14, the first vertical spring 15 is sleeved on the surface of the movable column 6 and positioned between the movable block 5 and the movable plate 12, the top of the first vertical spring 15 is fixedly connected with the bottom of the movable block 5, the bottom of the first vertical spring 15 is fixedly connected with the top of the movable plate 12, the bottom of the limiting baffle plate 14 is fixedly connected with the top block 16, the inner walls of the left side and the right side of the protective shell 4 and positioned above the limiting sliding groove block 7 are both fixedly connected with the supporting plate 17, one side of the top of the supporting plate 17, which is close to the movable column 6, is symmetrically provided with two second vertical springs 18, the middle point of the top of the supporting plate 17 is fixedly connected with the anti-tilting plate 34, one side of the anti-tilting plate 34, which is far away from the supporting plate 17, is fixedly connected with the protective shell, the top of the second vertical spring 18 is fixedly connected with a supporting block 19, the bottom of the movable block 5 is fixedly connected with an impact block 20 corresponding to the position of the supporting block 19, the position of the top of the supporting block 19 corresponding to the position of the impact block 20 is provided with an impact groove 21 matched with the impact groove, the cabinet body 1 vibrates up and down, the cabinet body 1 stretches the first vertical spring 15 through the matching of the movable plate 12, when the cabinet body 1 moves down, the movable block 5 drives the impact block 20 to move down, the impact block 20 compresses the second vertical spring 18 through the matching of the impact groove 21 and the supporting block 19, the adverse effect of the up and down vibration of the cabinet body 1 on the power distribution cabinet is reduced, the impact groove 21 is arranged to limit the impact block 20, when the impact block 20 moves down, the impact block 20 can be clamped in the impact groove 21, the positions of the inner walls at the front side and the rear side of the protective shell 4, the surface of the slide rail 22 is connected with a slide block 23 in a sliding manner, the movable plate 12 can move left and right by arranging the slide rail 22 and the slide block 23, one side of the slide block 23 close to the movable plate 12 is fixedly connected with an elastic belt 24, the two elastic belts 24 are fixedly connected with each other by the movable plate 12, when the cabinet body 1 vibrates front and back, the cabinet body 1 drives the movable column 6 to vibrate front and back by the movable block 5, the movable column 6 stretches the elastic belt 24 by the movable plate 12 to reduce the adverse effect of the front and back vibration of the cabinet body 1 on the power distribution cabinet, the front side of the top of the cabinet body 1 is fixedly connected with a bearing 25, the inner wall of the bearing 25 is fixedly connected with a rotating block 26, the top end of the rotating block 26 penetrates through the bearing 25 and extends to the outside thereof to be fixedly connected with a transverse connecting plate 27, the front side of the bottom, the top and the bottom of the rotating handle 30 are both fixedly connected with reinforcing rods 31, one side of each reinforcing rod 31 far away from the rotating handle 30 is fixedly connected with the cabinet door 29, through setting up anchor strut 31, prevent that rotatory handle 30 from damaging because of repetitious usage, through setting up protective housing 4, movable block 5, movable column 6, spacing chute piece 7, the sliding plate 8, the movable block 9, spring fixed plate 10, telescopic link 11, movable plate 12, horizontal spring 13, limit baffle 14, first vertical spring 15, kicking block 16, backup pad 17, second vertical spring 18, supporting shoe 19, striking block 20, striking recess 21, slide rail 22, slider 23 and elastic webbing 24, make high voltage distribution cabinet's shock attenuation effect become better, avoid switch board itself and switch board inside apparatus to damage, unnecessary economic damage has been avoided, the emergence of incident has been reduced, bring very big facility for the user.
When the cabinet body 1 vibrates leftwards and rightwards, the cabinet body 1 drives the movable column 6 to vibrate leftwards and rightwards through the movable block 5, the movable column 6 compresses the telescopic rod 11 and the transverse spring 13 through the movable plate 12, the adverse effect of the left and right vibration of the cabinet body 1 on the power distribution cabinet is reduced, when the cabinet body 1 vibrates forwards and backwards, the cabinet body 1 drives the movable column 6 to vibrate forwards and backwards through the movable block 5, the movable column 6 stretches the elastic belt 24 through the movable plate 12, the adverse effect of the front and back vibration of the cabinet body 1 on the power distribution cabinet is reduced, the shock absorption effect of the whole high-voltage power distribution cabinet is improved.
In summary, the following steps: this effectual high voltage distribution cabinet of shock attenuation through setting up protective housing 4, movable block 5, activity post 6, spacing spout piece 7, sliding plate 8, movable block 9, spring fixed plate 10, telescopic link 11, fly leaf 12, horizontal spring 13, spacing baffle 14, first vertical spring 15, kicking block 16, backup pad 17, second vertical spring 18, supporting shoe 19, striking block 20, striking recess 21, slide rail 22, slider 23 and elastic webbing 24, has solved the unsatisfactory problem of common high voltage distribution cabinet shock attenuation effect.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides an effectual high voltage distribution cabinet of shock attenuation, includes the cabinet body (1), its characterized in that: fixedly connected with baffle (2) on the inner wall of the cabinet body (1), the below fixedly connected with apparatus mounting panel (3) of baffle (2) just are located to the cabinet body (1) rear side inner wall, the below of the cabinet body (1) is provided with protective housing (4), the bottom fixedly connected with movable block (5) of the cabinet body (1), the bottom of movable block (5) runs through protective housing (4) and extends to its inside, equal fixedly connected with activity post (6) in both sides around movable block (5) bottom, equal fixedly connected with spacing spout piece (7) of protective housing (4) left and right sides inner wall, swing joint has sliding plate (8) in the recess that spacing spout piece (7) are close to activity post (6) one side, sliding plate (8) are close to one side fixedly connected with movable block (9) of activity post (6), one side that movable block (9) are close to activity post (6) runs through spacing spout piece (7) and extends to its outside fixed connection The spring fixing plate is connected with a spring fixing plate (10), two telescopic rods (11) are symmetrically arranged on one side, away from the limiting sliding groove block (7), of the spring fixing plate (10), the four telescopic rods (11) are fixedly connected through a movable plate (12), a transverse spring (13) is sleeved on the surface of each telescopic rod (11), one side, away from the movable plate (12), of the transverse spring (13) is fixedly connected with the spring fixing plate (10), one side, away from the spring fixing plate (10), of the transverse spring (13) is fixedly connected with the movable plate (12), the bottom of the movable column (6) penetrates through the movable plate (12) and extends to the outside of the movable column and is fixedly connected with a limiting baffle plate (14), a first vertical spring (15) is sleeved on the surface of the movable column (6) and is positioned between the movable block (5) and the movable plate (12), the top of the first vertical spring (15) is fixedly connected with the bottom of the, the bottom of the first vertical spring (15) is fixedly connected with the top of the movable plate (12), the bottom of the limiting baffle plate (14) is fixedly connected with a top block (16), the inner walls of the left side and the right side of the protective shell (4) are fixedly connected with a supporting plate (17) above the limiting sliding groove block (7), two second vertical springs (18) are symmetrically arranged on one side, close to the movable column (6), of the top of the supporting plate (17), the top of each second vertical spring (18) is fixedly connected with a supporting block (19), the bottom of each movable block (5) is fixedly connected with a collision block (20) corresponding to the supporting block (19), collision grooves (21) matched with the collision blocks are formed in positions, corresponding to the movable plate (12), of the inner walls of the front side and the rear side of the protective shell (4), sliding rails (22) are fixedly connected with the positions, the surperficial sliding connection of slide rail (22) has slider (23), slider (23) are close to one side fixedly connected with elastic band (24) of fly leaf (12), through fly leaf (12) fixed connection between two elastic band (24), the front side fixedly connected with bearing (25) at the cabinet body (1) top, fixedly connected with rotatory piece (26) on the inner wall of bearing (25), the top of rotatory piece (26) is run through bearing (25) and is extended to its outside fixedly connected with and connect diaphragm (27), connect front side fixedly connected with cabinet door pivot (28) of diaphragm (27) bottom, the fixed surface of cabinet door pivot (28) is connected with cabinet door (29), the rotatory handle (30) of front fixedly connected with of cabinet door (29).
2. The high-voltage power distribution cabinet with good damping effect according to claim 1, characterized in that: the top and the bottom of the rotating handle (30) are fixedly connected with reinforcing rods (31), and one side, far away from the rotating handle (30), of each reinforcing rod (31) is fixedly connected with the cabinet door (29).
3. The high-voltage power distribution cabinet with good damping effect according to claim 1, characterized in that: the equal fixedly connected with transport handle (32) in top of protective housing (4) left and right sides, one side fixedly connected with gag lever post (33) of protective housing (4) is kept away from to transport handle (32) bottom, one side and protective housing (4) fixed connection of transport handle (32) are kept away from in gag lever post (33).
4. The high-voltage power distribution cabinet with good damping effect according to claim 1, characterized in that: an anti-tipping plate (34) is fixedly connected to the middle point of the top of the supporting plate (17), and one side, far away from the supporting plate (17), of the anti-tipping plate (34) is fixedly connected with the protective shell (4).
5. The high-voltage power distribution cabinet with good damping effect according to claim 1, characterized in that: the equal fixedly connected with in top of both sides inner wall prevents bumping block (35) around protective housing (4), one side fixedly connected with of preventing bumping block (35) near movable block (5) prevents bumping pad (36).
6. The high-voltage power distribution cabinet with good damping effect according to claim 1, characterized in that: the left side and the right side of the protective shell (4) are fixedly connected with supporting connecting plates (37), and one side, away from the protective shell (4), of each supporting connecting plate (37) is fixedly connected with a placing plate (38).
CN201811333342.XA 2018-11-09 2018-11-09 Effectual high voltage distribution cabinet of shock attenuation Active CN109256705B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811333342.XA CN109256705B (en) 2018-11-09 2018-11-09 Effectual high voltage distribution cabinet of shock attenuation

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Application Number Priority Date Filing Date Title
CN201811333342.XA CN109256705B (en) 2018-11-09 2018-11-09 Effectual high voltage distribution cabinet of shock attenuation

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CN109256705A CN109256705A (en) 2019-01-22
CN109256705B true CN109256705B (en) 2020-06-12

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109712441A (en) * 2019-03-05 2019-05-03 河南经贸职业学院 A kind of practice device of construction engineering cost
CN111969427A (en) * 2020-08-25 2020-11-20 扬州鑫宝电气有限公司 Protection device convenient to high-voltage electrical equipment heat dissipation

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Publication number Priority date Publication date Assignee Title
KR20180063603A (en) * 2016-12-02 2018-06-12 주식회사 대경산전 Seismic switchgear equipped with pendulum type shock absorber
CN207743596U (en) * 2017-08-31 2018-08-17 河源输变电工程公司 A kind of box-type substation multi-stage, efficient damping base
CN207305170U (en) * 2017-09-08 2018-05-01 广西贵港市新宇电气设备有限公司 A kind of longer electromechanics relay protector of service life
CN208057787U (en) * 2018-03-30 2018-11-06 刘小华 A kind of damping for para-seismic support

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Effective date of registration: 20200512

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