CN112483530B - Electric power anti-theft bolt - Google Patents

Electric power anti-theft bolt Download PDF

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Publication number
CN112483530B
CN112483530B CN202011202054.8A CN202011202054A CN112483530B CN 112483530 B CN112483530 B CN 112483530B CN 202011202054 A CN202011202054 A CN 202011202054A CN 112483530 B CN112483530 B CN 112483530B
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CN
China
Prior art keywords
hole
nut
bolt
screw rod
rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202011202054.8A
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Chinese (zh)
Other versions
CN112483530A (en
Inventor
季靖峰
徐晓成
李明
王世红
于晓
杨洋
王建星
邹广平
张明超
吕重阳
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.)
Yantai Power Supply Co of State Grid Shandong Electric Power Co Ltd
Original Assignee
Yantai Power Supply Co of State Grid Shandong Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yantai Power Supply Co of State Grid Shandong Electric Power Co Ltd filed Critical Yantai Power Supply Co of State Grid Shandong Electric Power Co Ltd
Priority to CN202011202054.8A priority Critical patent/CN112483530B/en
Publication of CN112483530A publication Critical patent/CN112483530A/en
Application granted granted Critical
Publication of CN112483530B publication Critical patent/CN112483530B/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00Locking of screws, bolts or nuts
    • F16B39/02Locking of screws, bolts or nuts in which the locking takes place after screwing down
    • F16B39/04Locking of screws, bolts or nuts in which the locking takes place after screwing down with a member penetrating the screw-threaded surface of at least one part, e.g. a pin, a wedge, cotter-pin, screw
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B33/00Features common to bolt and nut
    • F16B33/008Corrosion preventing means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B33/00Features common to bolt and nut
    • F16B33/06Surface treatment of parts furnished with screw-thread, e.g. for preventing seizure or fretting
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00Locking of screws, bolts or nuts
    • F16B39/02Locking of screws, bolts or nuts in which the locking takes place after screwing down
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B41/00Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
    • F16B41/002Measures against loss of bolts, nuts or pins

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

The invention discloses an electric power anti-theft bolt which comprises a bolt base, wherein a screw rod is arranged at the upper end of the bolt base, a nut is arranged at the top of the screw rod, a slide rod is arranged at one end, close to the bolt base, of the screw rod, connecting rods are arranged on the upper end surface of the bolt base and positioned on two sides of the screw rod, a first electromagnet is arranged at the top of each connecting rod, a first through hole is formed in the outer side of the nut, connecting grooves are formed in the positions, corresponding to the connecting rods, of the bottom of the nut, second electromagnets are arranged in the two groups of connecting grooves, second through holes are formed in the positions, on the same side as the first through holes, of the outer sides of the slide rods, a fixed object is arranged at the upper end of the bolt base between the bolt base and the nut, fixed columns are sleeved in the first through holes and the second through holes, and fixed blocks are arranged at the tops of the fixed columns; this electric power theftproof bolt is through setting up first electromagnet and second electromagnet for this bolt possesses good theftproof effect, through setting up the fixed column, promotes the fastening effect of this bolt, effectively avoids its harmful effects that slides and cause.

Description

Electric power anti-theft bolt
Technical Field
The invention relates to the technical field of fixing and locking components, in particular to an electric power anti-theft bolt.
Background
The power bolt is applied to common power transmission lines, the base is stable, devices or parts such as transformers and the like are stable, and the power bolt has the most remarkable characteristic that the power bolt can withstand corrosion in field operation for a long time and has a strong collision friction function, and particularly has a certain anti-loosening function.
In recent years, national power grids are continuously built and popularized, but due to the interest driving and the fact that legal meanings of some people are thin, national power facilities are often stolen, particularly transformers, iron towers, cables and the like cause power line interruption, normal power utilization of people is influenced, and huge economic losses are brought to the country. Under the condition that the theft phenomenon is frequently prohibited, an anti-theft fastening facility is urgently needed to be designed to prevent the theft and ensure the smoothness of national power transmission.
The prior art has the following defects or problems:
1. the existing electric anti-theft bolt needs to be operated in the field for a long time, has short service cycle and does not have good corrosion-resistant and wear-resistant effects;
2. the existing electric power anti-theft bolt is not stable enough in connection, is easy to slide and influences the normal operation of equipment;
3. the existing electric power anti-theft bolt does not have anti-theft performance, and necessary loss is caused when the normal work of equipment is influenced after the bolt is lost.
Disclosure of Invention
The invention aims to provide an electric power anti-theft bolt aiming at the defects of the prior art, and aims to solve the problems that the bolt provided by the background art needs to be operated in the field for a long time, has short service cycle, does not have good corrosion and wear resistant effects, is not stable enough in connection, is easy to slide, influences the normal operation of equipment, does not have anti-theft performance, and causes necessary loss when the normal operation of the equipment is influenced after loss.
In order to achieve the purpose, the invention provides the following technical scheme: the bolt comprises a bolt base, the bolt base upper end is provided with the screw rod, the screw rod top is provided with the nut, the one end that the screw rod is close to the bolt base is provided with the slide bar, the both sides that bolt base up end is located the screw rod all are provided with the connecting rod, the connecting rod top is provided with first electro-magnet, first through-hole has been seted up in the nut outside, the spread groove has been seted up to the position that the nut bottom corresponds the connecting rod, the inside second electro-magnet that all is provided with of two sets of spread grooves, the slide bar outside has the second through-hole with first through-hole collateral position, it is provided with by the solid locking article to lie in the bolt base upper end between bolt base and the nut, first through-hole and the inside cover of second through-hole are equipped with the fixed column, the fixed column top is provided with the fixed block.
As a preferred technical scheme of the invention, the bolt base, the screw, the nut and the outer wall of the slide bar are all subjected to hot galvanizing treatment.
As a preferred technical scheme of the invention, the bolt base and the nut are both hexagonal structures, and the size of the bolt base is larger than that of the nut.
According to the preferable technical scheme, the nut is internally provided with a threaded hole, threads on the inner wall of the threaded hole are matched with threads on the outer wall of the screw, and the nut is in threaded connection with the screw through the threaded hole.
As a preferred technical scheme, a screw rod is welded at the upper end of the bolt base, a sliding rod is welded at the bottom of the screw rod, and the sliding rod is made of a metal material with a smooth outer wall.
As a preferred technical scheme of the present invention, a fixed object is sleeved outside the sliding rod, the connecting rod and the screw rod penetrate through the fixed object, and the length of the sliding rod is slightly greater than the fixed object.
According to the preferable technical scheme, two groups of connecting rods are fixedly connected to the upper end face of the bolt base on two sides of the screw rod, a connecting groove is formed in the position, corresponding to the connecting rods, of the bottom of the nut, the connecting groove is matched with the connecting rods, and the length of the connecting rods is the sum of the length of the connecting groove and the length of the exposed portion of the sliding rod.
According to the preferred technical scheme, the upper ends of the two groups of connecting rods are fixedly provided with first electromagnets, the inside of each connecting groove is fixedly provided with a second electromagnet, the sizes and the volumes of the first electromagnets and the second electromagnets are consistent, and the first electromagnets and the second electromagnets are electrically connected with an external circuit.
According to the preferable technical scheme, a first through hole is formed in the outer side of the nut, a second through hole is formed in the corresponding position of the outer side of the sliding rod, the first through hole is communicated with the second through hole, fixing columns are fixedly connected to the inner portions of the first through hole and the second through hole, the size of the outer wall of each fixing column is consistent with that of the inner wall of the second through hole, a fixing block is welded on one side of each fixing column, and the size of the outer wall of each fixing block is consistent with that of the inner wall of the first through hole.
As a preferred technical solution of the present invention, the fixing column penetrates through the first through hole and the second through hole and extends toward the inside of the slide bar.
Compared with the prior art, the invention provides an electric power anti-theft bolt which has the following beneficial effects:
1. according to the electric power anti-theft bolt, the bolt base, the screw, the nut and the outer wall of the sliding rod are subjected to hot galvanizing treatment by adopting a hot galvanizing treatment process, so that the electric power anti-theft bolt has good corrosion resistance and wear resistance, can adapt to long-term field operation, and is long in service cycle;
2. according to the electric power anti-theft bolt, the bolt base and the nut are both of a hexagonal structure, the size of the bolt base is larger than that of the nut, and the hexagonal structure is adopted, so that the bolt is convenient to mount and dismount;
3. according to the electric power anti-theft bolt, the threaded hole is formed in the nut, the thread on the inner wall of the threaded hole is matched with the thread on the outer wall of the screw rod, and the nut is in threaded connection with the screw rod through the threaded hole, so that the nut can be rotationally matched with the bolt base through the screw rod to perform locking treatment on an object;
4. the electric anti-theft bolt is provided with a sliding rod, a screw rod is welded at the upper end of a bolt base, a sliding rod is welded at the bottom of the screw rod, and the sliding rod is made of a metal material with a smooth outer wall;
5. according to the electric power anti-theft bolt, the slide rod and the connecting rod are arranged, the fixed object is sleeved outside the slide rod, the connecting rod and the screw rod penetrate through the fixed object, the length of the slide rod is slightly larger than that of the fixed object, the fixed object can be better clamped, and the fixing forbidding effect of the bolt is improved;
6. according to the electric power anti-theft bolt, the connecting grooves are formed, the upper end face of the bolt base is positioned on two sides of the screw rod and fixedly connected with the two groups of connecting rods, the connecting grooves are formed in the positions, corresponding to the connecting rods, of the bottom of the nut, the connecting grooves are matched with the connecting rods, the length of each connecting rod is the sum of the length of the corresponding connecting groove and the length of the exposed portion of the corresponding sliding rod, the connecting rods are conveniently connected with the connecting grooves, and the anti-theft effect of the bolt is improved;
7. according to the electric power anti-theft bolt, the first electromagnet and the second electromagnet are arranged, the first electromagnets are fixedly installed at the upper ends of the two groups of connecting rods, the second electromagnet is fixedly installed inside the connecting groove, the sizes and the volumes of the first electromagnet and the second electromagnet are consistent, and the first electromagnet and the second electromagnet are electrically connected with an external circuit and attract each other, so that the anti-theft effect of the bolt is improved;
8. according to the electric power anti-theft bolt, the first through hole and the second through hole are formed, the first through hole is formed in the outer side of the nut, the second through hole is formed in the corresponding position of the outer side of the sliding rod, the first through hole is communicated with the second through hole, the inner parts of the first through hole and the second through hole are fixedly connected with the fixing column, the size of the outer wall of the fixing column is consistent with that of the inner wall of the second through hole, the fixing block is welded on one side of the fixing column, and the size of the outer wall of the fixing block is consistent with that of the inner wall of the first through hole, so that the fixing column can be installed in the bolt;
9. this electric power theftproof bolt, through setting up the fixed column, the fixed column runs through in first through-hole and second through-hole and to the inside extension of slide bar, promotes the fastening effect of this bolt, effectively avoids its harmful effects that slide and cause.
Drawings
FIG. 1 is a schematic front view of the structure of the present invention;
FIG. 2 is a perspective view of the present invention;
FIG. 3 is a perspective view of the nut of the present invention;
FIG. 4 is a perspective view of the fixing post structure of the present invention;
FIG. 5 is a schematic view of the structural connection of the present invention;
fig. 6 is a front view of the structural attachment of the present invention.
In the figure: 1. a bolt base; 2. a screw; 3. a nut; 31. a threaded hole; 4. a slide bar; 5. a connecting rod; 6. a first electromagnet; 7. a first through hole; 8. connecting grooves; 9. a second electromagnet; 10. a second through hole; 11. an object to be locked; 12. a fixed block; 13. and (5) fixing the column.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1-6, in the present embodiment: including bolt base 1, 1 upper end of bolt base is provided with screw rod 2, 2 tops of screw rod are provided with nut 3, the one end that screw rod 2 is close to bolt base 1 is provided with slide bar 4, 1 up end of bolt base is located the both sides of screw rod 2 and all is provided with connecting rod 5, 5 tops of connecting rod are provided with first electro-magnet 6, first through-hole 7 has been seted up in the nut 3 outside, spread groove 8 has been seted up to the position that 3 bottoms of nut correspond connecting rod 5, the inside second electro-magnet 9 that all is provided with of two sets of spread grooves 8, the slide bar 4 outside and first through-hole 7 unilateral position have second through-hole 10, it is provided with by solid locking article 11 to lie in 1 upper end of bolt base between bolt base 1 and the nut 3, first through-hole 7 and the inside cover of second through-hole 10 are equipped with fixed column 13, fixed column 13 top is provided with fixed block 12.
In the embodiment, the outer walls of the bolt base 1, the screw rod 2, the nut 3 and the slide rod 4 are subjected to hot galvanizing treatment, so that the anti-corrosion and anti-abrasion device has good corrosion resistance and abrasion resistance, can adapt to long-term field operation, and is long in service cycle; the bolt base 1 and the nut 3 are both hexagonal structures, the size of the bolt base 1 is larger than that of the nut 3, and the bolt is convenient to mount and dismount due to the hexagonal structure; a threaded hole 31 is formed in the nut 3, threads on the inner wall of the threaded hole 31 are matched with threads on the outer wall of the screw rod 2, and the nut 3 is in threaded connection with the screw rod 2 through the threaded hole 31, so that the nut 3 can be rotationally matched with the bolt base 1 by the screw rod 2 to fix and lock an object; the upper end of the bolt base 1 is welded with a screw rod 2, the bottom of the screw rod 2 is welded with a sliding rod 4, and the sliding rod 4 is made of a metal material with a smooth outer wall; the outside of the sliding rod 4 is sleeved with a fixedly-locked object 11, the connecting rod 5 and the screw 2 penetrate through the fixedly-locked object 11, the length of the sliding rod 4 is slightly larger than that of the fixedly-locked object 11, the fixedly-locked object 11 can be better clamped, and the fixing prohibiting effect of the bolt is improved; the upper end face of the bolt base 1 is positioned on two sides of the screw rod 2 and is fixedly connected with two groups of connecting rods 5, the bottom of the nut 3 is provided with a connecting groove 8 corresponding to the connecting rod 5, the connecting groove 8 is matched with the connecting rod 5, the length of the connecting rod 5 is the sum of the lengths of the exposed parts of the connecting groove 8 and the slide rod 4, the connecting rod 5 is conveniently connected with the connecting groove 8, and the anti-theft effect of the bolt is improved; the upper ends of the two groups of connecting rods 5 are fixedly provided with first electromagnets 6, the inside of the connecting groove 8 is fixedly provided with second electromagnets 9, the sizes and the volumes of the first electromagnets 6 and the second electromagnets 9 are consistent, and the first electromagnets 6 and the second electromagnets 9 are electrically connected with an external circuit and attract each other, so that the anti-theft effect of the bolt is improved; a first through hole 7 is formed in the outer side of the nut 3, a second through hole 10 is formed in the corresponding position of the outer side of the sliding rod 4, the first through hole 7 is communicated with the second through hole 10, a fixed column 13 is fixedly connected to the inner portions of the first through hole 7 and the second through hole 10, the size of the outer wall of the fixed column 13 is consistent with that of the inner wall of the second through hole 10, a fixed block 12 is welded on one side of the fixed column 13, and the size of the outer wall of the fixed block 12 is consistent with that of the inner wall of the first through hole 7, so that the fixed column 13 can be installed in the bolt; the fixing column 13 penetrates through the first through hole 7 and the second through hole 10 and extends towards the inside of the sliding rod 4, so that the fastening effect of the bolt is improved, and adverse effects caused by sliding of the bolt are effectively avoided.
The working principle and the using process of the invention are as follows: at first place by the solid locking article 11 with 1 upper end of bolt base, the screw rod 2, slide bar 4 and connecting rod 5 run through in by solid locking article 11, through twisting nut 3, make it move on screw rod 2, when nut 3 removed to slide bar 4 on, through pressing nut 3, make its connecting rod 5 and spread groove 8 looks joint, let first electro-magnet 6 inhale with second electro-magnet 9 function looks, make this bolt possess good theftproof effect, through pegging graft to first through-hole 7 and second through-hole 10 with fixed column 13 afterwards, accomplish the fixing to nut 3 and slide bar 4, make this equipment connect more firmly, can effectively avoid the harmful effects that the landing brought.

Claims (1)

1. An electric power theftproof bolt which characterized in that: the bolt comprises a bolt base (1), a screw rod (2) is arranged at the upper end of the bolt base (1), a nut (3) is arranged at the top of the screw rod (2), a sliding rod (4) is arranged at one end, close to the bolt base (1), of the screw rod (2), connecting rods (5) are arranged on the upper end face of the bolt base (1) and located on two sides of the screw rod (2), a first electromagnet (6) is arranged at the top of each connecting rod (5), a first through hole (7) is formed in the outer side of each nut (3), connecting grooves (8) are formed in the bottom of each nut (3) and located corresponding to the connecting rods (5), a second electromagnet (9) is arranged inside each two connecting grooves (8), a second through hole (10) is formed in the outer side of each sliding rod (4) and in the same side of the first through hole (7), a fixed object (11) is arranged between the bolt base (1) and the nut (3) and located on the upper end of the bolt base (1), a fixed object (11) is sleeved inside the first through hole (7) and the second through hole (10), and a fixed column (13), and the top of the fixed column (13) are provided with the fixed blocks (12);
the outer walls of the bolt base (1), the screw (2), the nut (3) and the slide bar (4) are subjected to hot galvanizing treatment;
the bolt base (1) and the nut (3) are both hexagonal structures, and the size of the bolt base (1) is larger than that of the nut (3);
a threaded hole (31) is formed in the nut (3), threads on the inner wall of the threaded hole (31) are matched with threads on the outer wall of the screw rod (2), and the nut (3) is in threaded connection with the screw rod (2) through the threaded hole (31);
the bolt base (1) is welded with a screw rod (2) at the upper end, a sliding rod (4) is welded at the bottom of the screw rod (2), and the sliding rod (4) is made of a metal material with a smooth outer wall;
the outer part of the sliding rod (4) is sleeved with a fixedly locked object (11), the connecting rod (5) and the screw rod (2) penetrate through the fixedly locked object (11), and the length of the sliding rod (4) is slightly larger than that of the fixedly locked object (11);
two groups of connecting rods (5) are fixedly connected to the upper end face of the bolt base (1) at two sides of the screw rod (2), a connecting groove (8) is formed in the position, corresponding to the connecting rod (5), of the bottom of the nut (3), the connecting groove (8) is matched with the connecting rod (5), and the length of the connecting rod (5) is the sum of the lengths of the connecting groove (8) and the exposed part of the sliding rod (4);
the upper ends of the two groups of connecting rods (5) are fixedly provided with first electromagnets (6), second electromagnets (9) are fixedly arranged in the connecting grooves (8), the sizes and the volumes of the first electromagnets (6) and the second electromagnets (9) are consistent, and the first electromagnets (6) and the second electromagnets (9) are electrically connected with an external circuit;
a first through hole (7) is formed in the outer side of the nut (3), a second through hole (10) is formed in the corresponding position of the outer side of the sliding rod (4), the first through hole (7) is communicated with the second through hole (10), a fixing column (13) is fixedly connected to the inner portions of the first through hole (7) and the second through hole (10), the size of the outer wall of the fixing column (13) is consistent with that of the inner wall of the second through hole (10), a fixing block (12) is welded on one side of the fixing column (13), and the size of the outer wall of the fixing block (12) is consistent with that of the inner wall of the first through hole (7);
the fixing column (13) penetrates through the first through hole (7) and the second through hole (10) and extends towards the inside of the sliding rod (4).
CN202011202054.8A 2020-11-02 2020-11-02 Electric power anti-theft bolt Active CN112483530B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011202054.8A CN112483530B (en) 2020-11-02 2020-11-02 Electric power anti-theft bolt

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Application Number Priority Date Filing Date Title
CN202011202054.8A CN112483530B (en) 2020-11-02 2020-11-02 Electric power anti-theft bolt

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CN112483530A CN112483530A (en) 2021-03-12
CN112483530B true CN112483530B (en) 2022-10-14

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115620994B (en) * 2022-10-12 2023-12-08 江苏亨特集团华特电气有限公司 Antitheft transformer

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWM409961U (en) * 2011-03-01 2011-08-21 Gourmet Equipment Taiwan Corp Vehicle wheel rim fastening component
CN202158057U (en) * 2011-07-08 2012-03-07 武汉钢铁(集团)公司 Locking bolt
CN205780206U (en) * 2016-07-16 2016-12-07 天津市浩越全五金制品有限公司 A kind of check bolt
CN210660998U (en) * 2019-09-29 2020-06-02 孚德逊(苏州)通用设备有限责任公司 Bolt fastener capable of preventing loosening in reverse rotation
CN210830096U (en) * 2019-10-12 2020-06-23 宁波宁力高强度紧固件有限公司 Round-head lower four-lock bolt with movable bolt head
CN211550255U (en) * 2019-12-19 2020-09-22 中国航空工业集团公司西安飞机设计研究所 Hinge bolt

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Effective date of registration: 20220921

Address after: 264000 Jiefang Road 158, Zhifu District, Yantai, Shandong

Applicant after: STATE GRID SHANDONG ELECTRIC POWER COMPANY YANTAI POWER SUPPLY Co.

Address before: 264000 Jiefang Road 158, Zhifu District, Yantai, Shandong

Applicant before: STATE GRID SHANDONG ELECTRIC POWER COMPANY YANTAI POWER SUPPLY Co.

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