CN107196077B - Wall concealed-installation grounding terminal box and installation method thereof - Google Patents

Wall concealed-installation grounding terminal box and installation method thereof Download PDF

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Publication number
CN107196077B
CN107196077B CN201710564459.8A CN201710564459A CN107196077B CN 107196077 B CN107196077 B CN 107196077B CN 201710564459 A CN201710564459 A CN 201710564459A CN 107196077 B CN107196077 B CN 107196077B
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holes
copper bar
shell
cover plate
wall
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CN201710564459.8A
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Chinese (zh)
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CN107196077A (en
Inventor
李元龙
吕培培
张笈玮
闫亦非
张孝春
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No63926 Unit Of Pla
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No63926 Unit Of Pla
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Priority to CN201710564459.8A priority Critical patent/CN107196077B/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/66Connections with the terrestrial mass, e.g. earth plate, earth pin
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/22Bases, e.g. strip, block, panel
    • H01R9/24Terminal blocks
    • H01R9/2483Terminal blocks specially adapted for ground connection
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05FSTATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
    • H05F3/00Carrying-off electrostatic charges
    • H05F3/02Carrying-off electrostatic charges by means of earthing connections
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Or Junction Boxes (AREA)

Abstract

The invention discloses a wall concealed-installation grounding terminal box and an installation method thereof, wherein the terminal box comprises a shell, a cover plate, a wiring terminal and a copper bar, wherein a box opening of the shell is connected with the cover plate, and the copper bar is arranged in the shell; the cover plate is provided with through holes, the copper bars are also provided with through holes, the number of the copper bar through holes is greater than that of the cover plate through holes, and the position of each cover plate through hole corresponds to one copper bar through hole; the binding post passes through the apron through-hole and corresponding copper bar through-hole, inserts in the casing from the apron outside, and the copper bar passes through binding post and apron connection. The installation method comprises the following steps: embedding a shell, connecting an external cable, and fixing a cover plate and a wiring terminal. The invention provides a wall concealed-installation grounding terminal box which is convenient for wiring and dismounting and has good protection performance and an installation method thereof.

Description

Wall concealed-installation grounding terminal box and installation method thereof
Technical Field
The invention belongs to the technical field of electrical engineering construction, and particularly relates to a wall concealed grounding terminal box suitable for places with strict requirements on grounding resistance, such as a factory building, an operation room, a laboratory and the like, and an installation method thereof.
Background
The prior precision equipment has very high requirements on grounding systems, and special requirements on the form of a grounding terminal box in special places such as certain factory buildings, operation rooms or laboratories are met, so that the equipment and the grounding point can be conveniently connected and removed. The grounding terminal box in the market is either closed, so that the wiring and the dismantling are inconvenient; or the structure is too simple, the metal part lacks protection, the grounding accuracy is affected, and the grounding terminal box which is suitable for the special engineering needs is not provided.
Disclosure of Invention
In order to solve the defects, the invention aims to provide a wall concealed-installation grounding terminal box which is convenient for wiring and disconnecting and has good protection performance and an installation method thereof. The aim of the invention is achieved by the following technical scheme.
The wall concealed-installation grounding terminal box comprises a shell, a cover plate, a wiring terminal and a copper bar, wherein the shell is a rectangular box body with an opening at the front surface, a box opening of the shell is connected with the cover plate, and the copper bar is arranged in the shell; the cover plate is provided with through holes, the copper bars are also provided with through holes, the number of the copper bar through holes is greater than that of the cover plate through holes, and the position of each cover plate through hole corresponds to one copper bar through hole; the binding post passes through the apron through-hole and corresponding copper bar through-hole, inserts in the casing from the apron outside, and the copper bar passes through binding post and apron connection.
Further, a wiring hole is formed in the wall surface of the shell, and the shell is connected with the cover plate through bolts.
Further, two through holes are formed in the cover plate, and 3 or 4 through holes are formed in the copper bar; the aperture of the cover plate through hole is the same as that of the copper bar through hole, and the positions of the two through holes on the two sides of the copper bar correspond to the positions of the two through holes of the cover plate; two cover plate through holes are respectively connected with a wiring terminal.
Further, the shell is a metal junction box, and the cover plate is a plastic white cover plate.
Further, the length of the shell is 146mm, the width of the shell is 86mm, and the depth of the shell is 70mm; the copper bar is 30mm in width, 3mm in thickness and 50-100mm in length.
Further, the connection terminal is 633 type connection terminal, 666 type connection terminal or 555 type connection terminal.
The utility model provides a static electricity discharge ground connection electric terminal box, includes wall secretly adorns ground connection terminal box and a metal ball subassembly that discharges, metal ball subassembly includes metal ball, metal pole, base and terminal, and metal ball welding is on the metal pole top, and metal pole bottom welding is on the base, and metal pole lower extreme welding has the terminal, the terminal with connect through copper braid strip between the wall secretly adorns ground connection terminal box.
The wall concealed-installation grounding terminal box comprises a shell, a cover plate, a wiring terminal and a copper bar, wherein the shell is a rectangular box body with an opening at the front surface, a box opening of the shell is connected with the cover plate, and the copper bar is arranged in the shell; the cover plate is provided with through holes, the copper bars are also provided with through holes, the number of the copper bar through holes is greater than that of the cover plate through holes, and the position of each cover plate through hole corresponds to one copper bar through hole; the wiring terminal penetrates through the cover plate through hole and the corresponding copper bar through hole, and is inserted into the shell from the outer side of the cover plate, and the copper bar is connected with the cover plate through the wiring terminal; two through holes are formed in the cover plate, and 3 or 4 through holes are formed in the copper bar; the aperture of the cover plate through hole is the same as that of the copper bar through hole, and the positions of the two through holes on the two sides of the copper bar correspond to the positions of the two through holes of the cover plate; two apron through-holes insert a binding post respectively, and its characterized in that includes following installation step:
1) Embedding a shell: embedding the box opening of the shell into a wall body along with civil construction outwards, wherein the box opening plane of the shell is flush with the wall body when the wall body is a concrete wall body, and the shell protrudes out of the wall surface by 10-15mm when the wall body is a brick masonry wall;
2) Accessing an external cable: the end head of the external cable is made of tenon-shaped galvanized flat steel, and a through hole is formed in the tenon of the galvanized flat steel; a gap is formed on the lower end wall surface of the shell, galvanized flat steel is inserted into the shell from the gap, and the tenon is inwards; placing the copper bar into the shell, aligning the through hole in the middle of the copper bar with the through hole of the tenon, and screwing the copper bar and the galvanized flat steel by using a galvanized bolt;
3) Cover plate and binding post's fixed: fixing the cover plate on the shell, and enabling the positions of the two through holes on the cover plate to correspond to the positions of the through holes on the two sides of the copper bar; two binding posts penetrate into the cover plate through holes and the corresponding copper bar through holes respectively, and the binding posts are screwed with the copper bars and the cover plates respectively by bolts.
Furthermore, if the wall concealed installation grounding terminal box is a terminal box, only one galvanized flat steel is connected into the shell in the step 2); if the copper bar is provided with 3 through holes, the through holes of the galvanized flat steel tenons are aligned with the through holes in the middle of the copper bar and fixed by galvanized bolts; if the copper bar is provided with 4 through holes, the through holes of the galvanized flat steel tenon are aligned with any one of the two through holes in the middle of the copper bar and fixed by galvanized bolts.
Furthermore, the wall concealed installation grounding terminal box is a middle box, 4 through holes are formed in the copper bar, two galvanized flat steels are inserted in the shell in parallel in the step 2), and the through holes of the two galvanized flat steel tenons correspond to the two through holes in the middle of the copper bar respectively and are fixed through galvanized bolts.
The invention has the beneficial effects that:
1) The wall concealed-installation grounding terminal box provided by the invention is convenient for wiring and dismounting and has good protection performance;
2) When the wall concealed-installation grounding terminal box is used, the cover plate is not required to be opened, and only the wiring terminal is required to be moved, so that the operation is simple and convenient; the cover plate of the terminal box adopts a white panel consistent with the switch and the socket in the room, so that the appearance is simple and elegant, and the integral decoration effect of the room is not affected;
3) According to the wall concealed-installation grounding terminal box provided by the invention, through detection, under the condition that a grounding bus is perfect, the grounding resistance can generally reach below 0.4 ohm, and the lowest can reach below 0.1 ohm, so that the test requirement is met.
The invention will be described in further detail with reference to the drawings and the detailed description.
Drawings
FIG. 1 is a schematic view showing an exploded structure of a wall-mounted grounding terminal box of the present invention;
FIG. 2 is a front view of the wall-mounted grounding terminal box of the present invention;
FIG. 3 is a top view of the wall blind attachment ground terminal block of the present invention;
FIG. 4 is a side view of the wall blind attachment ground terminal block of the present invention;
fig. 5 is a schematic structural diagram of an electrostatic discharge grounding electric terminal box according to the present invention.
Reference numerals:
1. a housing; 2. copper bars; 3. a cover plate; 4. a connection terminal; 5. galvanized flat steel; 6. a concealed ground terminal box; 7. a metal ball; 8. a metal rod; 9. a base; 10. a connection terminal; 11. copper braid.
Detailed Description
Example 1
As shown in fig. 1-4, a wall-mounted grounding terminal box comprises a shell 1, a cover plate 3, a wiring terminal 4 and a copper bar 2, wherein the shell 1 is a rectangular box body with an opening at the front surface, a box opening of the shell 1 is connected with the cover plate 4, and the copper bar 2 is arranged in the shell 1; the cover plate 3 is provided with through holes, the copper bars 4 are also provided with through holes, the number of the copper bar through holes is greater than that of the cover plate through holes, and the position of each cover plate through hole corresponds to one copper bar through hole; the binding post passes through the apron through-hole and corresponding copper bar through-hole, inserts in the casing from the apron outside, and the copper bar passes through binding post and apron connection.
The wall surface of the shell 1 is provided with a wiring hole, and the shell 1 is connected with the cover plate 3 through a phi 4 bolt.
In this embodiment: two through holes are formed in the cover plate, and 3 or 4 through holes are formed in the copper bar according to the specification of the wiring terminal; the aperture of the cover plate through hole is the same as that of the copper bar through hole, and the positions of the two through holes on the two sides of the copper bar correspond to the positions of the two through holes of the cover plate; two cover plate through holes are respectively connected with a wiring terminal.
The casing is a metal junction box, and the cover plate is a plastic white cover plate. The length of the shell is 146mm, the width of the shell is 86mm, and the depth of the shell is 70mm; the copper bar is 30mm in width, 3mm in thickness and 50-100mm in length.
The binding post is 633 type binding post, 666 type binding post or 555 type binding post.
For the convenience of wiring, the copper strips can also be replaced by corresponding copper braid crimping wiring noses.
Example 2
A mounting method of a wall-mounted ground terminal box in embodiment 1, the wall-mounted ground terminal box being a terminal box, comprising the steps of:
1) Embedding a shell: embedding the box opening of the shell into a wall body along with civil construction outwards, wherein the box opening plane of the shell is flush with the wall body when the wall body is a concrete wall body, and the shell protrudes out of the wall surface by 10-15mm when the wall body is a brick masonry wall;
2) Accessing an external cable: the end head of the external cable is made of tenon-shaped galvanized flat steel, and a through hole is formed in the tenon of the galvanized flat steel; a gap is formed on the lower end wall surface of the shell, galvanized flat steel is inserted into the shell from the gap, and the tenon is inwards; placing the copper bar into the shell, aligning the through hole in the middle of the copper bar with the through hole of the tenon, and screwing the copper bar and the galvanized flat steel by using a galvanized bolt; only one galvanized flat steel is connected into the shell; if the copper bar is provided with 3 through holes, the through holes of the galvanized flat steel tenons are aligned with the through holes in the middle of the copper bar and fixed by galvanized bolts; if the copper bar is provided with 4 through holes, the through holes of the galvanized flat steel tenon are aligned with any one of the two through holes in the middle of the copper bar and fixed by galvanized bolts;
3) Cover plate and binding post's fixed: fixing the cover plate on the shell, and enabling the positions of the two through holes on the cover plate to correspond to the positions of the through holes on the two sides of the copper bar; two binding posts penetrate into the cover plate through holes and the corresponding copper bar through holes respectively, and the binding posts are screwed with the copper bars and the cover plates respectively by bolts.
In this embodiment:
and (3) drilling holes in the middle positions of the left and right 1/4 positions of the 146 type plastic white cover plate respectively, wherein the diameters of the holes are compared with the diameters of the selected wiring terminals, the types 633 and 666 are M10, the type 555 is M8, and if no special requirement exists, 2 wiring terminals are adopted for each wiring box, and 2 holes are formed.
Cutting 50-100mm copper bar, and forming 3 or 4 through holes with the same aperture as that of the white cover plate.
According to the requirements, about 30cm of galvanized flat steel with the diameter of 40 x 4 or 30 x 3 is taken, one end of the galvanized flat steel is processed into a tenon shape, and a hole is formed near the center of the tenon shape, and the aperture is the same as that of the hole of the copper bar.
Because the wiring terminal of the grounding terminal box is exposed outside, the wiring terminal cap is only required to be loosened or unscrewed when the grounding terminal box is used, and the grounding terminal box is tightly wound with the wiring terminal by using a fork-shaped metal connector or a common metal wire and then tightly pressed by using a screw cap.
If the junction box (shell) needs to be pre-buried, a notch is formed in the side face of the junction box during installation, then galvanized flat steel, copper strips and the like are placed in the junction box, the tail end of the galvanized flat steel is welded with the pre-buried flat steel, a wall groove is removed, the wall is buried, and mortar is smeared and compacted. Or the processed tenon-shaped galvanized flat steel is welded at one end of the flat steel to be pre-buried, the position is fixed during pre-buried, the flat steel is directly placed into a junction box, and the flat steel is well connected with copper bars and the like during installation. However, this installation requires high requirements for the pre-buried location and requires accurate positioning.
Example 3
Another method for installing the wall-mounted grounding terminal box in embodiment 1, which is an intermediate box, has the switching function, and is the same as embodiment 2 except for step 2).
In the step 2), 4 through holes are formed in the copper bar, two galvanized flat steels are inserted in the shell in parallel, and the through holes of the tenons of the two galvanized flat steels correspond to the two through holes in the middle of the copper bar respectively and are fixed by galvanized bolts.
Example 4
As shown in fig. 5, an electrostatic discharge grounding terminal box comprises the wall concealed-installation grounding terminal box 6 and a metal discharge ball assembly in the embodiment 1, wherein the metal discharge ball assembly comprises a metal ball 7, a metal rod 8, a base 9 and a binding post 10, the metal ball is welded at the top end of the metal rod, the bottom of the metal rod is welded on the base, the binding post is welded at the lower end of the metal rod, and the binding post 10 is connected with the wall concealed-installation grounding terminal box 6 through a copper braid 11.
In the electrostatic discharge grounding terminal box of the embodiment, a metal discharge ball assembly is added on the basis of the hidden grounding terminal box. Is generally placed at a doorway, and is touched by hands when entering and exiting the doorway so as to achieve the effect of removing static electricity. The metal ball is generally 7-8cm in radius, welded on a metal rod or a stainless steel tube, and the bottom end is welded on a base. The lower end of the metal rod is welded with a binding post. According to the distance between the concealed grounding box and the door, 2-5 m 30 x 3 copper braid belts are taken, two ends of each copper braid belt are connected by fork-shaped terminals, when the concealed grounding box is used, a binding post for placing a ball is connected with the concealed grounding box, and the concealed grounding box is normally collected behind the door, does not occupy room space, is simple to use, and has universal applicability in places with strict requirements on static electricity, such as laboratories, factories and operation rooms.

Claims (5)

1. The wall concealed-installation grounding terminal box comprises a shell, a cover plate, a wiring terminal and a copper bar, wherein the shell is a rectangular box body with an opening at the front surface, a box opening of the shell is connected with the cover plate, and the copper bar is arranged in the shell; the cover plate is provided with through holes, the copper bars are also provided with through holes, the number of the copper bar through holes is greater than that of the cover plate through holes, and the position of each cover plate through hole corresponds to one copper bar through hole; the wiring terminal penetrates through the cover plate through hole and the corresponding copper bar through hole, and is inserted into the shell from the outer side of the cover plate, and the copper bar is connected with the cover plate through the wiring terminal; two through holes are formed in the cover plate, and 3 or 4 through holes are formed in the copper bar; the aperture of the cover plate through hole is the same as that of the copper bar through hole, and the positions of the two through holes on the two sides of the copper bar correspond to the positions of the two through holes of the cover plate; two apron through-holes insert a binding post respectively, and its characterized in that includes following installation step:
1) Embedding a shell: embedding the box opening of the shell into a wall body along with civil construction outwards, wherein the box opening plane of the shell is flush with the wall body when the wall body is a concrete wall body, and the shell protrudes out of the wall surface by 10-15mm when the wall body is a brick masonry wall;
2) Accessing an external cable: the end head of the external cable is made of tenon-shaped galvanized flat steel, and a through hole is formed in the tenon of the galvanized flat steel; a gap is formed on the lower end wall surface of the shell, galvanized flat steel is inserted into the shell from the gap, and the tenon is inwards; placing the copper bar into the shell, aligning the through hole in the middle of the copper bar with the through hole of the tenon, and screwing the copper bar and the galvanized flat steel by using a galvanized bolt;
3) Cover plate and binding post's fixed: fixing the cover plate on the shell, and enabling the positions of the two through holes on the cover plate to correspond to the positions of the through holes on the two sides of the copper bar; penetrating two wiring terminals into the cover plate through holes and the corresponding copper bar through holes respectively, and screwing bolts of the wiring terminals with the copper bars and the cover plates respectively;
the wall concealed installation grounding terminal box is a terminal box, and only one galvanized flat steel is connected into the shell in the step 2); if the copper bar is provided with 3 through holes, the through holes of the galvanized flat steel tenons are aligned with the through holes in the middle of the copper bar and fixed by galvanized bolts; if the copper bar is provided with 4 through holes, the through holes of the galvanized flat steel tenon are aligned with any one of the two through holes in the middle of the copper bar and fixed by galvanized bolts; or the wall concealed installation grounding terminal box is a middle box, 4 through holes are formed in the copper bar, two galvanized flat steels are inserted in the shell in parallel in the step 2), and the through holes of the two galvanized flat steel tenons correspond to the two through holes in the middle of the copper bar respectively and are fixed by galvanized bolts.
2. The method of installing a wall-mounted ground terminal box according to claim 1, wherein: the shell is provided with wiring holes on the wall surface and is connected with the cover plate through bolts.
3. The method of installing a wall-mounted ground terminal box according to claim 1, wherein: the shell is a metal junction box, and the cover plate is a plastic white cover plate.
4. The method of installing a wall-mounted ground terminal box according to claim 1, wherein: the length of the shell is 146mm, the width of the shell is 86mm, and the depth of the shell is 70mm; the copper bar is 30mm in width, 3mm in thickness and 50-100mm in length.
5. The method of installing a wall-mounted ground terminal box according to claim 1, wherein: the wiring terminal is 633 type wiring terminal, 666 type wiring terminal or 555 type wiring terminal.
CN201710564459.8A 2017-07-12 2017-07-12 Wall concealed-installation grounding terminal box and installation method thereof Active CN107196077B (en)

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CN201710564459.8A CN107196077B (en) 2017-07-12 2017-07-12 Wall concealed-installation grounding terminal box and installation method thereof

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Application Number Priority Date Filing Date Title
CN201710564459.8A CN107196077B (en) 2017-07-12 2017-07-12 Wall concealed-installation grounding terminal box and installation method thereof

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CN107196077A CN107196077A (en) 2017-09-22
CN107196077B true CN107196077B (en) 2024-03-29

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108336544B (en) * 2018-02-06 2019-06-28 安徽江淮汽车集团股份有限公司 Wiring harness connector

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2655441Y (en) * 2003-10-24 2004-11-10 刘红林 Equipotential grounding terminal box
CN201430370Y (en) * 2009-04-03 2010-03-24 天津电力建设公司 Structure of temporary earth terminal box for equipment maintenance
CN101784153A (en) * 2010-01-26 2010-07-21 青岛澳波泰克安全设备有限责任公司 Human body electrostatic discharge alarm apparatus
CN203060583U (en) * 2013-03-04 2013-07-17 大庆天鸿伟业测控技术有限公司 Electrostatic discharge device
CN104135809A (en) * 2014-05-30 2014-11-05 中国石油化工股份有限公司 Multifunctional electrostatic discharge device
CN106711888A (en) * 2016-12-16 2017-05-24 上海市政工程设计研究总院(集团)有限公司 Grounding cassette and application construction method thereof
CN207149717U (en) * 2017-07-12 2018-03-27 中国人民解放军63926部队 A kind of wall concealed installation ground terminal box and electrostatic discharge ground terminal box

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2655441Y (en) * 2003-10-24 2004-11-10 刘红林 Equipotential grounding terminal box
CN201430370Y (en) * 2009-04-03 2010-03-24 天津电力建设公司 Structure of temporary earth terminal box for equipment maintenance
CN101784153A (en) * 2010-01-26 2010-07-21 青岛澳波泰克安全设备有限责任公司 Human body electrostatic discharge alarm apparatus
CN203060583U (en) * 2013-03-04 2013-07-17 大庆天鸿伟业测控技术有限公司 Electrostatic discharge device
CN104135809A (en) * 2014-05-30 2014-11-05 中国石油化工股份有限公司 Multifunctional electrostatic discharge device
CN106711888A (en) * 2016-12-16 2017-05-24 上海市政工程设计研究总院(集团)有限公司 Grounding cassette and application construction method thereof
CN207149717U (en) * 2017-07-12 2018-03-27 中国人民解放军63926部队 A kind of wall concealed installation ground terminal box and electrostatic discharge ground terminal box

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