CN111244649B - Insulating terminal and high-voltage switch thereof - Google Patents
Insulating terminal and high-voltage switch thereof Download PDFInfo
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- CN111244649B CN111244649B CN202010101327.3A CN202010101327A CN111244649B CN 111244649 B CN111244649 B CN 111244649B CN 202010101327 A CN202010101327 A CN 202010101327A CN 111244649 B CN111244649 B CN 111244649B
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- heat
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
- H01R11/03—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the relationship between the connecting locations
- H01R11/05—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the relationship between the connecting locations the connecting locations having different types of direct connections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-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
- H01R4/28—Clamped connections, spring connections
- H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-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
- H01R4/70—Insulation of connections
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- Switch Cases, Indication, And Locking (AREA)
- Connections Arranged To Contact A Plurality Of Conductors (AREA)
Abstract
The invention discloses an insulating terminal and a high-voltage switch thereof, which comprise an insulating shell, wherein one end of a first conductive block, which is far away from a second conductive block, is provided with a first trapezoidal connecting hole, a first conductive rod is inserted in the first trapezoidal connecting hole, a heat conducting piece is embedded in a position, which is close to a first insulating heat conducting adhesive layer, of an elastic clamping ring, the heat conducting piece is connected with a heat radiating piece, an installation groove is formed in the elastic clamping ring, a plurality of drying beads are arranged in the installation groove, a heat transfer piece is fixedly arranged on one side, which is close to the heat conducting piece, of the installation groove, and the heat transfer piece is fixedly connected with the. The invention provides an insulating terminal which can adapt to conductive rod connecting pieces with various thickness specifications of different equipment, is internally provided with an elastic snap ring to ensure stable connection, has a waterproof and heat dissipation function, and can be repeatedly dried and reused under the heat conduction action of a heat transfer element.
Description
Technical Field
The invention relates to the technical field of conducting devices, in particular to an insulating terminal and a high-voltage switch thereof.
Background
The insulated terminal is actually a section of metal sealed in the insulated plastic, both ends of the insulated terminal are provided with holes for inserting the wires, and screws are used for fastening or loosening, for example, two wires need to be connected sometimes and disconnected sometimes, and then the wires can be connected by the terminal and disconnected at any time without welding or winding the wires together, so that the insulated terminal is convenient and quick.
In the prior art, a waterproof insulating terminal with application number "201822178829.7" comprises a conductive rod, wherein the conductive rod is fixedly connected with an insulating sleeve, the insulating sleeve covers the conductive rod, two ends of the insulating sleeve are provided with wiring screw holes, conductive connectors are connected in the wiring screw holes in a threaded manner, the conductive connectors after being screwed abut against the conductive rod, a heat-shrinkable section is fixedly connected to the wiring screw holes and surrounds the conductive connectors, two ends of the insulating sleeve are also fixedly connected with a drainage plate, and the drainage plate shields two ends of the insulating sleeve; the staff passes pyrocondensation section and screws behind the screw hole of working a telephone switchboard with conductive joint, to pyrocondensation section heating, make its shrink paste tight conductive joint, when having rainwater infiltration in the equipment cabinet behind the rain, at first can be guided by the drainage plate, can directly not fall at insulating cover both ends, even fall insulating cover both ends, also can be separated by pyrocondensation section and insulating cover, can not contact the conducting rod, thereby promote the waterproof nature of waterproof insulation terminal, make the security performance of waterproof insulation terminal improve.
However, the method still has the obvious defects in the using process: 1. the size of a wiring screw hole in the device is single, the device can only adapt to one conductive joint, and in the actual use process, the thickness specifications of the conductive joints of different equipment are diversified, so that the applicable environment of the device is limited, various insulating terminals are required to be equipped in a complex environment, and the installation is time-consuming and labor-consuming; 2. the device is lack of a structure for clamping the conductive connector, so that the connecting end is easy to loosen to influence the use; 3. according to the device, the drying bags are arranged on one surface, close to the insulating sleeve, of the drainage plate, so that the drying bags can only absorb and dry moisture at two end parts of the insulating terminal, but cannot dry the connecting end of the conductive connector, the drying effect is limited, and the pertinence is lacked; 4. the device is lack of a necessary heat dissipation structure, so that heat accumulation is easy to occur at the conductive joint, and the service life of the device is influenced.
Disclosure of Invention
The present invention is directed to an insulated terminal and a high voltage switch thereof, which solve the above problems.
In order to achieve the purpose, the invention provides the following technical scheme:
an insulated terminal comprises an insulated shell, wherein a first conductive block and a second conductive block are fixedly arranged in the insulated shell, and the first conductive block is connected with the second conductive block;
a second trapezoid connecting hole is formed in one end, away from the first conductive block, of the second conductive block, a second conductive rod is inserted in the second trapezoid connecting hole, a second insulating heat-conducting adhesive layer is sleeved outside the second conductive rod, a first trapezoid connecting hole is formed in one end, away from the second conductive block, of the first conductive block, a first conductive rod is inserted in the first trapezoid connecting hole, a first insulating heat-conducting adhesive layer is sleeved outside the first conductive rod, an elastic snap ring is arranged outside the first insulating heat-conducting adhesive layer, an outer elastic telescopic ring and an inner elastic telescopic ring are respectively connected and arranged between the elastic snap ring and the insulating shell, an intermediate layer is formed between the outer elastic telescopic ring and the inner elastic telescopic ring, a spring is arranged in the intermediate layer, one end of the spring is fixed on the insulating shell, and the other end of the spring is abutted against the elastic snap ring, the position department inlay card that elasticity snap ring is close to first insulation heat conduction glue film is provided with heat conduction piece, heat conduction piece and heat dissipation piece link to each other, the heat dissipation piece extends to elasticity snap ring's the outside, set up the mounting groove in the elasticity snap ring, the both sides of mounting groove are provided with outer expansion network and inlayer expansion network respectively, be provided with a plurality of dry pearls in the mounting groove, the mounting groove is close to the fixed heat transfer piece that is provided with in one side of heat conduction piece, heat transfer piece and heat conduction piece are fixed continuous, heat dissipation channel has been seted up to one side that elasticity snap ring is close to outer expansion network.
Preferably, the outer sides of the first conductive block and the second conductive block are both provided with a heat conduction ring, the heat conduction ring is arranged in an insulating shell, one side of the insulating shell, which is close to the heat conduction ring, is provided with a heat dissipation hole, and a waterproof breathable film is fixedly arranged in the heat dissipation hole.
Preferably, a connecting ring is fixedly arranged at the tail end of the insulating shell close to the second conductive block, a threaded hole is formed in the connecting ring, and a locking bolt is arranged in the threaded hole in a threaded manner.
Preferably, the heat dissipation member is fixedly provided with heat dissipation fins.
A high-voltage switch comprises the insulated terminal.
Compared with the prior art, the invention has the beneficial effects that:
1. the trapezoidal connecting holes are formed in the two conductive blocks of the device, so that two ends of the insulating terminal can be respectively connected with conductive rods with different thicknesses, the conductive connection requirements of various devices are met, the application range is wide, and time and labor are saved;
2. the elastic clamping ring is arranged in the device, so that the conducting rod of the external equipment can be clamped, loosening is prevented, the stability of electrical connection is effectively kept, and the normal work of the equipment is ensured;
3. the device is provided with the mounting groove at the position close to the conducting rod, and the drying beads are arranged in the mounting groove, so that redundant moisture can be adsorbed, water seepage and water leakage at the position of the external conducting rod inside the insulating terminal are effectively avoided, and the device is more targeted and has better waterproof effect;
4. this device is provided with heat conduction spare and heat-sink piece in the position department of hugging closely the conducting rod, can in time give off the inside heat that is produced by the conducting rod as the connecting piece of insulating terminal, avoids long-pending hot damage component, and in addition, the heat can be conducted to the dry pearl in the mounting groove through heat conduction spare, promotes dry pearl in time to carry out the heating evaporation with absorptive moisture, the follow-up waterproof use of being convenient for, effectively utilized inside long-pending hot reach and promote dry pearl and last effectual effect.
The invention provides an insulating terminal which can adapt to conductive rod connecting pieces with various thickness specifications of different equipment, is internally provided with an elastic snap ring to ensure stable connection, has a waterproof and heat dissipation function, and can be repeatedly dried and reused under the heat conduction action of a heat transfer element.
Drawings
FIG. 1 is a schematic cross-sectional view of the overall structure of the present invention;
fig. 2 is an enlarged view of the invention at a in fig. 1.
In the figure: 1 insulating shell, 2 first conducting blocks, 3 second conducting blocks, 4 heat conduction rings, 5 heat dissipation holes, 6 waterproof breathable films, 7 connecting rings, 8 threaded holes, 9 locking bolts, 10 second trapezoidal connection holes, 11 second conducting rods, 12 second insulating heat conduction adhesive layers, 13 first trapezoidal connection holes, 14 first conducting rods, 15 first insulating heat conduction adhesive layers, 16 elastic snap rings, 17 outer elastic telescopic rings, 18 inner elastic telescopic rings, 19 middle layers, 20 springs, 21 heat conducting pieces, 22 heat dissipation pieces, 23 heat dissipation fins, 24 mounting grooves, 25 outer telescopic nets, 26 inner telescopic nets, 27 drying beads, 28 heat conducting pieces and 29 heat dissipation channels.
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. 1-2, the present invention provides a technical solution:
an insulated terminal comprises an insulated shell 1, wherein a first conductive block 2 and a second conductive block 3 are fixedly arranged inside the insulated shell 1, and the first conductive block 2 and the second conductive block 3 are connected and can conduct electricity.
A second trapezoidal connecting hole 10 is formed in one end, far away from the first conductive block 2, of the second conductive block 3, a second conductive rod 11 is inserted into the second trapezoidal connecting hole 10, a second insulating heat-conducting adhesive layer 12 is sleeved outside the second conductive rod 11, a first trapezoidal connecting hole 13 is formed in one end, far away from the second conductive block 3, of the first conductive block 2, the first trapezoidal connecting hole 13 and the second trapezoidal connecting hole 10 are sequentially connected into trapezoidal holes through multiple groups of round holes with different sizes, the round hole close to the outer side is the largest, so that the first conductive rod 14 and the second conductive rod 11 adapt to different sizes of different thicknesses and specifications are formed, a first conductive rod 14 is inserted into the first trapezoidal connecting hole 13, the first conductive rod 14 and the second conductive rod 11 are both connecting pieces of external equipment, a first insulating heat-conducting adhesive layer 15 is sleeved outside the first conductive rod 14, and the first insulating heat-conducting adhesive layer 15 and the second insulating heat-conducting adhesive layer 12 both have double functions of heat conduction, the silicone adhesive is a single-component room-temperature vulcanized silicone adhesive and has the characteristics of convenience in use, high bonding strength, elasticity after curing, impact resistance, vibration resistance and the like, and simultaneously, a cured product has good heat conduction and heat dissipation functions and excellent high and low temperature resistance and electrical performance, an elastic snap ring 16 is arranged on the outer side of a first insulation heat conduction adhesive layer 15, the size of the elastic snap ring 16 can be adjusted in a telescopic mode, an outer elastic expansion ring 17 and an inner elastic expansion ring 18 are respectively connected between the elastic snap ring 16 and an insulation shell 1, the outer elastic expansion ring 17 and the inner elastic expansion ring 18 also have stretching and compressing properties, an intermediate layer 19 is formed between the outer elastic expansion ring 17 and the inner elastic expansion ring 18, a spring 20 is arranged in the intermediate layer 19, one end of the spring 20 is fixed on the insulation shell 1, the other end of the spring 20 is abutted against the elastic snap ring 16, the arrangement of the spring 20 can promote the elastic snap ring 16 to clamp a, the anti-loosening elastic clamping ring 16 is provided with a heat conducting piece 21 in a clamping and embedding manner at a position close to the first insulating heat conducting adhesive layer 15, the heat conducting piece 21 is used for conducting heat generated by the first conducting rod 14, the heat conducting piece 21 is connected with a heat radiating piece 22, the heat radiating piece 22 extends to the outer side of the elastic clamping ring 16 so as to radiate the heat in time, a mounting groove 24 is formed in the elastic clamping ring 16, two sides of the mounting groove 24 are respectively provided with an outer expansion net 25 and an inner expansion net 26, the outer expansion net 25 and the inner expansion net 26 can expand along with the expansion and contraction of the elastic clamping ring 16, a plurality of drying beads 27 are arranged in the mounting groove 24, the drying beads 27 can be fixedly arranged or movably arranged, the drying beads 27 have water absorption performance and can be continuously reused after thermal drying, a heat conducting piece 28 is fixedly arranged at one side of the mounting groove 24 close to the heat conducting piece 21, the heat transfer element 28 mainly functions to transfer heat absorbed by the heat conduction element 21 to the mounting groove 24, so that the drying beads 27 in the mounting groove 24 can be thermally evaporated and dried for repeated use, and a heat dissipation channel 29 is formed in one side of the elastic snap ring 16 close to the outer layer expansion net 25 for heat dissipation and ventilation.
As a preferred, the outer sides of the first conductive block 2 and the second conductive block 3 are both provided with a heat conduction ring 4, the heat conduction ring 4 can conduct and dissipate the heat generated by the first conductive block 2 and the second conductive block 3 in time, the heat conduction ring 4 is arranged in the insulating housing 1, one side of the insulating housing 1 close to the heat conduction ring 4 is provided with a heat dissipation hole 5 for heat dissipation, a waterproof breathable film 6 is fixedly arranged in the heat dissipation hole 5, gas exchange during heat dissipation cannot be influenced, but the inside corrosion of moisture can be effectively avoided.
Preferably, the insulating housing 1 is fixedly provided with a connecting ring 7 near the tail end of the second conductive block 3, the connecting ring 7 is provided with a threaded hole 8, and a locking bolt 9 is threadedly arranged in the threaded hole 8, so that the insulating terminal can be fixedly mounted integrally.
Preferably, the heat sink 22 is fixedly provided with heat dissipation fins 23, and the heat dissipation fins 23 are arranged to increase the heat dissipation rate of the heat sink 22.
A high-voltage switch comprises the insulated terminal.
The working principle is as follows: when the insulating terminal is used, a second conducting rod 11 on external equipment at one end is firstly inserted into a second trapezoidal connecting hole 10 with proper size in a second conducting block 3, then a connecting ring 7 is close to the shell of the external equipment, a locking bolt 9 sequentially penetrates through a threaded hole 8 and a mounting hole in the shell of the external equipment, the locking bolt 9 is screwed, and the insulating terminal is integrally fixed; and then, after the first conducting rod 14 of the device at the other end passes through the elastic clamping ring 16, the first conducting rod is inserted into the first trapezoidal connection hole 13 with a proper size in the first conducting block 2, at the moment, the spring 20 is compressed in different degrees according to the size of the first conducting rod 14, so that the elastic clamping ring 16 is tightened to the inner ring, the first conducting rod 14 is stably clamped, and the loosening is prevented.
During the use process, if the moisture content of the air at the position of the first conductive rod 14 inside the insulating shell 1 is high, the drying beads 27 can absorb the moisture, and the water is effectively prevented; in addition, the heat that produces on the first conducting rod 14 can distribute through first insulating heat conduction glue film 15, first insulating heat conduction glue film 15 conducts the heat to heat conduction piece 21, on the one hand, heat conduction piece 21 is with heat transfer to heat dissipation piece 22, heat dissipation piece 22 and radiating fin 23 in time carry out the heat and distribute, avoid long-pending heat, on the other hand, heat on the heat conduction piece 21 passes through heat transfer piece 28 and transmits to inside mounting groove 24, thereby heat drying pearl 27, be convenient for dry pearl 27's used repeatedly, thereby can turn into the favourable heat with harmful long-pending heat and promote dry pearl 27's reuse, effective extension fixture's life, improve water-proof effects's stability.
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 (5)
1. An insulated terminal comprising an insulating housing (1), characterized in that: a first conductive block (2) and a second conductive block (3) are fixedly arranged in the insulating shell (1), and the first conductive block (2) is connected with the second conductive block (3);
the one end that first conducting block (2) was kept away from in second conducting block (3) has seted up second trapezoidal hole (10), second conducting rod (11) has been inserted in second trapezoidal hole (10), the outside cover of second conducting rod (11) is equipped with second insulating heat-conducting glue film (12), the one end that second conducting block (3) was kept away from in first conducting block (2) has seted up first trapezoidal hole (13), first conducting rod (14) has been inserted in first trapezoidal hole (13), the outside cover of first conducting rod (14) is equipped with first insulating heat-conducting glue film (15), the outside of first insulating heat-conducting glue film (15) is provided with elastic snap ring (16), connect respectively between elastic snap ring (16) and insulating casing (1) and be provided with outer elastic expansion ring (17) and interior elastic expansion ring (18), outer elastic expansion ring (17) and interior elastic expansion ring (18) interval cover are established on first conducting rod (14), form intermediate level (19) between outer elastic expansion ring (17) and interior elastic expansion ring (18), be provided with spring (20) in intermediate level (19), the one end of spring (20) is fixed on insulating casing (1), the other end and the snap ring (16) of spring (20) are inconsistent, the snap ring (16) are close to the position department inlay card of first insulation heat-conducting glue layer (15) and are provided with heat-conducting piece (21), first insulation heat-conducting glue layer (15) and heat-conducting piece (21) contact setting, heat-conducting piece (21) and radiating piece (22) link to each other, radiating piece (22) extend to the outside of snap ring (16), set up mounting groove (24) in snap ring (16), the both sides of mounting groove (24) are provided with outer expansion net (25) and inlayer expansion net (26) respectively, outer expansion net (25) and inlayer expansion net (26) are along the perpendicular of the extending direction of first conducting rod (14) The direction interval sets up, be provided with a plurality of dry pearls (27) in mounting groove (24), dry pearl (27) set up between outer expansion net (25) and inlayer expansion net (26), one side that mounting groove (24) are close to heat-conducting member (21) is fixed and is provided with heat transfer member (28), heat transfer member (28) are close to dry pearl (27) and set up, heat transfer member (28) and heat-conducting member (21) are fixed continuous, radiating channel (29) have been seted up to one side that snap ring (16) are close to outer expansion net (25).
2. An insulated terminal according to claim 1, characterized in that: the outer sides of the first conductive block (2) and the second conductive block (3) are provided with heat conduction rings (4), the heat conduction rings (4) are arranged in the insulating shell (1), heat dissipation holes (5) are formed in one side, close to the heat conduction rings (4), of the insulating shell (1), and waterproof breathable films (6) are fixedly arranged in the heat dissipation holes (5).
3. An insulated terminal according to claim 1, characterized in that: the tail end of the insulating shell (1) close to the second conductive block (3) is fixedly provided with a connecting ring (7), the connecting ring (7) is provided with a threaded hole (8), and a locking bolt (9) is arranged in the threaded hole (8) in a threaded manner.
4. An insulated terminal according to claim 1, characterized in that: the heat dissipation piece (22) is fixedly provided with heat dissipation fins (23).
5. A high voltage switch, characterized by: an insulated terminal comprising any of the preceding claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010101327.3A CN111244649B (en) | 2020-02-19 | 2020-02-19 | Insulating terminal and high-voltage switch thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010101327.3A CN111244649B (en) | 2020-02-19 | 2020-02-19 | Insulating terminal and high-voltage switch thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111244649A CN111244649A (en) | 2020-06-05 |
| CN111244649B true CN111244649B (en) | 2021-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010101327.3A Active CN111244649B (en) | 2020-02-19 | 2020-02-19 | Insulating terminal and high-voltage switch thereof |
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| Country | Link |
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| CN (1) | CN111244649B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115173088B (en) * | 2022-07-07 | 2023-04-14 | 东莞市康祥电子有限公司 | High-frequency electronic connector |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203858900U (en) * | 2014-05-16 | 2014-10-01 | 乐清市威尔龙高温线缆有限公司 | Durable cable |
| CN206236804U (en) * | 2016-12-17 | 2017-06-09 | 重庆市银盛模具有限公司 | A kind of stamping mold electric wire connecting junction |
| CN206495642U (en) * | 2017-02-10 | 2017-09-15 | 阳泉煤业（集团）有限责任公司 | A kind of drill bit for being adapted to different drilling rods |
| CN207967892U (en) * | 2018-04-07 | 2018-10-12 | 江苏勤丰管业有限公司 | A kind of power cable protecting pipe that heat conduction is moisture-proof |
-
2020
- 2020-02-19 CN CN202010101327.3A patent/CN111244649B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203858900U (en) * | 2014-05-16 | 2014-10-01 | 乐清市威尔龙高温线缆有限公司 | Durable cable |
| CN206236804U (en) * | 2016-12-17 | 2017-06-09 | 重庆市银盛模具有限公司 | A kind of stamping mold electric wire connecting junction |
| CN206495642U (en) * | 2017-02-10 | 2017-09-15 | 阳泉煤业（集团）有限责任公司 | A kind of drill bit for being adapted to different drilling rods |
| CN207967892U (en) * | 2018-04-07 | 2018-10-12 | 江苏勤丰管业有限公司 | A kind of power cable protecting pipe that heat conduction is moisture-proof |
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| CN111244649A (en) | 2020-06-05 |
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Effective date of registration: 20210331 Address after: No.81, 1st Road, Cixia Industrial Zone, Wentang community, Dongcheng Street, Dongguan City, Guangdong Province, 523121 Applicant after: Dongguan Tongbei Electric Power Industry Co.,Ltd. Address before: Room a-219, Department of internal medicine, 1151 Yan'an South Road, bengshan District, Bengbu City, Anhui Province Applicant before: Bengbu Puyuan Electric Technology Co.,Ltd. |
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Address after: No. 81, 1st Road, Wentang Cixia Industrial Zone, Wentang Community, Dongcheng Street, Dongguan City, Guangdong Province, 523000 Patentee after: Guangdong Tongbei Electric Power Industry Co.,Ltd. Address before: No.81, 1st Road, Cixia Industrial Zone, Wentang community, Dongcheng Street, Dongguan City, Guangdong Province, 523121 Patentee before: Dongguan Tongbei Electric Power Industry Co.,Ltd. |
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