CN110752574B - Explosion-proof device for high-voltage cable terminal - Google Patents

Explosion-proof device for high-voltage cable terminal Download PDF

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Publication number
CN110752574B
CN110752574B CN201911053073.6A CN201911053073A CN110752574B CN 110752574 B CN110752574 B CN 110752574B CN 201911053073 A CN201911053073 A CN 201911053073A CN 110752574 B CN110752574 B CN 110752574B
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China
Prior art keywords
support rods
explosion
cable terminal
sleeve
fixing sleeve
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CN201911053073.6A
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Chinese (zh)
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CN110752574A (en
Inventor
王红州
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Essex Electric Nanjing Co ltd
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Essex Electric Nanjing Co ltd
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Publication of CN110752574A publication Critical patent/CN110752574A/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00Cable fittings
    • H02G15/02Cable terminations
    • H02G15/06Cable terminating boxes, frames or other structures
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C3/00Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/16Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways

Abstract

The invention discloses a high-voltage cable terminal explosion-proof device which adjusts the whole length of the explosion-proof device through an upper fixed sleeve and a lower fixed sleeve with adjustable space and effectively inhibits flame by matching with a small dry powder fire extinguishing ball, and is characterized in that one end of a plurality of outer support rods is vertically arranged on the lower fixed sleeve, the plurality of outer support rods are distributed at equal angles, the other end of the outer support rods vertically extends upwards, a plurality of outer protective ribs are spirally wound on the outer support rods at equal angles, one end of each outer protective rib is connected with the lower fixed sleeve, one end of a plurality of inner support rods is vertically arranged on the lower fixed sleeve, a plurality of inner support rods are distributed at equal angles, the inner support rods are positioned in a circle formed by the plurality of support rods in a surrounding mode, the other end of each inner support rod vertically extends upwards, a plurality of inner protective ribs are spirally wound on the inner support rods, and the inner protective ribs are positioned between the outer support rods and the inner support rods, one end of the inner protection rib is connected with the lower fixing sleeve, and the plurality of placing sleeves are fixedly arranged on the inner support rod.

Description

Explosion-proof device for high-voltage cable terminal
Technical Field
The invention discloses an explosion-proof device for a high-voltage cable terminal, relates to an explosion-proof device for protecting the high-voltage cable terminal from explosion, and belongs to the field of power equipment. In particular to a high-voltage cable terminal explosion-proof device which adjusts the whole length of the explosion-proof device through an upper fixed sleeve and a lower fixed sleeve with adjustable intervals and effectively inhibits flame by matching with a small dry powder fire extinguishing ball.
Background
Porcelain shell formula cable terminal is because its self-cleaning performance is good, ageing resistance can be strong by the wide application on high tension cable terminal, but its electric porcelain bushing of porcelain shell formula cable terminal is breakable material, when cable terminal breaks down and produces the explosion, it can produce a large amount of explosion fragments, these fragment that fly out are easy to cable on every side, equipment or even personnel cause serious injury, influence electric power system's normal operating, current cable terminal explosion-proof equipment generally through set up the round in terminal outside department and block the structure and carry out the blockking to the explosion fragment, but block structure overall length and fixed structure, can't carry out effective regulation according to the actual protection length at terminal, produce the back of catching a fire in the explosion simultaneously, can't carry out effectual suppression or put out a fire to flame.
The publication number CN208112198U discloses an explosion-proof device for a high-voltage cable terminal, which comprises a top seat and a base, wherein the cross sections of the top seat and the base are circular, a plurality of upper installation parts distributed in a circular array are arranged on the circumferential edge of the lower end surface of the top seat, lower installation parts corresponding to the upper installation parts are correspondingly arranged on the circumferential edge of the upper end surface of the base, a first through hole for the high-voltage cable terminal to pass through in a matching way is arranged in the middle of the base, and a fixing groove for matching and connecting the head of the high-voltage cable terminal is arranged in the middle of the top; the number of the insulating rods is the same as that of the upper mounting pieces, the top end of each insulating rod is connected with the upper mounting piece, and the bottom end of each insulating rod is connected with the lower mounting piece, so that the plurality of insulating rods are matched to surround the high-voltage cable terminal; the insulating rod includes the insulating rod body, is provided with along the axial multiunit full skirt of arranging side by side around the insulating rod body lateral wall, the full skirt along radial outside salient in insulating rod body lateral wall, the device protection length is fixed can't carry out convenient regulation according to the installation actual demand, can't carry out timely effectual processing to the fire that the explosion produced simultaneously.
Disclosure of Invention
In order to improve the situation, the invention provides the high-voltage cable terminal explosion-proof device which adjusts the whole length of the explosion-proof device through the upper fixing sleeve and the lower fixing sleeve with adjustable intervals and effectively inhibits flame by matching with a small dry powder fire extinguishing ball.
The invention relates to a high-voltage cable terminal explosion-proof device, which is realized by the following steps: the invention relates to a high-voltage cable terminal explosion-proof device which comprises an outer rotating ring, an upper fixing sleeve, an outer protective rib, an outer support rod, a lower fixing sleeve, an inner support rod, an inner protective rib, a top tightening screw, a small dry powder fire extinguishing ball, an inner rotating ring, a sliding slot and a placing sleeve, wherein one end of a plurality of outer support rods is vertically arranged on the lower fixing sleeve, the plurality of outer support rods are distributed at equal angles, the other end of the outer support rods vertically extends upwards, the plurality of outer protective ribs are spirally wound on the outer support rods at equal angles, one end of each outer protective rib is connected with the lower fixing sleeve, one end of each inner support rod is vertically arranged on the lower fixing sleeve, the plurality of inner support rods are distributed at equal angles, the inner support rods are positioned in a circle formed by the plurality of support rods in a surrounding mode, the other end of each inner support rod vertically extends upwards, the plurality of inner protective ribs are spirally wound on the inner support rods, and the inner protective ribs are, one end of the inner protective rib is connected with the lower fixing sleeve, a plurality of placing sleeves are fixedly arranged on the inner supporting rod and are distributed at equal intervals, a plurality of small dry powder fire extinguishing balls are correspondingly clamped in the placing sleeves one by one, the outer protective rib is made of elastic bendable material, the inner protective rib is made of elastic bendable material, the upper fixing sleeve is positioned above the lower fixing sleeve, two groups of sliding insertion blocks are arranged on the outer wall of the upper fixing sleeve, one group of sliding insertion blocks consists of two sliding insertion blocks, the outer rotating ring is rotatably sleeved on the upper fixing sleeve, two sliding insertion slots are formed in the inner wall of the outer rotating ring, the inner rotating ring is rotatably sleeved on the fixing sleeve and is positioned at the bottom of the outer rotating ring, two groups of sliding insertion blocks are respectively inserted in the sliding insertion slots in the inner wall of the outer rotating ring and the inner rotating ring, and the outer diameter of the outer rotating ring is larger than that of the inner rotating ring, the outer rotating ring bottom is connected with the other ends of the outer protective ribs, and the inner rotating ring bottom is connected with the other ends of the inner protective ribs. A plurality of jacking screws distributed at equal angles are screwed on the outer rotating ring, a plurality of jacking screws distributed at equal angles are screwed on the inner rotating ring, the outer diameter of the upper fixing sleeve is smaller than that of the lower fixing sleeve, the inner diameter of the upper fixing sleeve is equal to that of the lower fixing sleeve, the outer diameter of the outer rotating ring is equal to that of the lower fixing sleeve, the length of the outer protection rib is greater than that of the inner protection rib, the lengths of the outer supporting rod and the inner supporting rod are smaller than that of the inner protection rib, an anti-slip pad is arranged on the inner wall of the upper fixing sleeve, an anti-slip pad is arranged on the inner wall of the lower fixing sleeve, the placing sleeve is an elastic opening sleeve, and embedded teeth are arranged on the wall of the opening sleeve;
furthermore, a telescopic inner telescopic rod is arranged on the inner supporting rod, and a telescopic outer telescopic rod is arranged on the outer supporting rod.
Has the beneficial effects.
The explosion-proof wrapping range can be flexibly adjusted according to the length of the cable terminal, and the cable terminal is convenient for personnel to use.
And secondly, the small dry powder fire extinguishing ball can extinguish the fire generated by explosion in time, so that the loss is reduced.
And thirdly, the mesh density formed by the inner and outer protective ribs can be flexibly adjusted, and different use requirements can be met.
Fourthly, the use and the operation are simple and convenient, and the threat degree of explosion to surrounding personnel and equipment is reduced.
Drawings
FIG. 1 is a perspective view of the explosion-proof device for a high-voltage cable terminal according to the present invention;
FIG. 2 is a schematic structural diagram of the explosion-proof device for the high-voltage cable terminal of the invention;
FIG. 3 is a schematic structural view of a fixing sleeve on the explosion-proof device of the high-voltage cable terminal of the invention;
FIG. 4 is a perspective view of the lower fixing sleeve of the explosion-proof device for the high-voltage cable terminal of the present invention;
FIG. 5 is a perspective view of the explosion-proof unit of the high-voltage cable terminal according to the present invention when not in use;
fig. 6 is a schematic structural view of an explosion-proof device of a high-voltage cable terminal of embodiment 2 of the invention.
In the attached drawings
Wherein the method comprises the following steps: the fire extinguishing device comprises an outer rotating ring (1), an upper fixing sleeve (2), an outer protection rib (3), an outer support rod (4), a lower fixing sleeve (5), an inner support rod (6), an inner protection rib (7), a set screw (8), a small dry powder fire extinguishing ball (9), an inner rotating ring (10), a sliding slot (11), an inner telescopic rod (12), a placing sleeve (13) and an outer telescopic rod (14).
The specific implementation mode is as follows:
example 1:
the invention discloses a high-voltage cable terminal explosion-proof device, which is realized by an outer rotating ring (1), an upper fixed sleeve (2), outer protective ribs (3), outer support rods (4), a lower fixed sleeve (5), inner support rods (6), inner protective ribs (7), a set screw (8), a small-sized dry powder fire extinguishing ball (9), an inner rotating ring (10), a sliding slot (11) and a placing sleeve (13), wherein one end of a plurality of outer support rods (4) is vertically arranged on the lower fixed sleeve (5), the plurality of outer support rods (4) are distributed at equal angles, the other end of each outer support rod (4) vertically extends upwards, the plurality of outer protective ribs (3) are spirally wound on the outer support rods (4) at equal angles, one end of each outer protective rib (3) is connected with the lower fixed sleeve (5), one end of each inner support rod (6) is vertically arranged on the lower fixed sleeve (5), and the plurality of inner support rods (6) are distributed at equal angles, the inner supporting rod (6) is positioned in a circle formed by a plurality of supporting rods in a surrounding manner, the other end of the inner supporting rod (6) vertically extends upwards, a plurality of inner protective ribs (7) are spirally wound on the inner supporting rod (6), the inner protective ribs (7) are positioned between the outer supporting rod (4) and the inner supporting rod (6), one end of each inner protective rib (7) is connected with the corresponding lower fixing sleeve (5), a plurality of placing sleeves (13) are fixedly arranged on the inner supporting rod (6), a plurality of placing sleeves (13) are distributed at equal intervals, a plurality of small dry powder fire extinguishing balls (9) are correspondingly clamped in the placing sleeves (13) one by one, the outer protective ribs (3) are made of elastic bendable materials, the inner protective ribs (7) are made of elastic bendable materials, the upper fixing sleeve (2) is positioned above the lower fixing sleeve (5), two groups of sliding insertion blocks are arranged on the outer wall of the upper fixing sleeve (2), and one group of sliding insertion blocks is composed of two sliding insertion blocks, the rotatable cover of outer change ring (1) is arranged on fixed cover (2), it has two slip slots (11) to open on outer change ring (1) inner wall, and the rotatable cover of interior change ring (10) is arranged in on the fixed cover, and is located the bottom of outer change ring (1), it has two slip slots (11) to open on interior change ring (10) inner wall, two sets of slip inserted block inserts respectively and arranges in slip slots (11) on outer change ring (1) and interior change ring (10) inner wall, the external diameter of outer change ring (1) is greater than the external diameter of interior change ring (10), outer change ring (1) bottom and a plurality of the other end of outer protection muscle (3) are connected, interior change ring (10) bottom and a plurality of the other end of interior protection muscle (7) is connected, the tight top screw that a plurality of equiangular distributions were put to the spiro union on outer change ring (1), the spiro union is put a plurality of the tight top screw that equiangular distributions on interior change ring (10), the outer diameter of the upper fixing sleeve (2) is smaller than that of the lower fixing sleeve (5), the inner diameter of the upper fixing sleeve (2) is equal to that of the lower fixing sleeve (5), the outer diameter of the outer rotating ring (1) is equal to that of the lower fixing sleeve (5), the length of the outer protection rib (3) is larger than that of the inner protection rib (7), the lengths of the outer supporting rod (4) and the inner supporting rod (6) are smaller than that of the inner protection rib (7), an anti-slip pad is arranged on the inner wall of the upper fixing sleeve (2), an anti-slip pad is arranged on the inner wall of the lower fixing sleeve (5), the placing sleeve (13) is an elastic opening sleeve, and embedding teeth are arranged on the wall of the opening sleeve;
when the explosion-proof device is used, the explosion-proof device is longest in an initial state, the outer protection rib (3) and the inner protection rib (7) are in a vertical state, when explosion-proof is needed to be carried out on a high-voltage cable terminal, a worker firstly sleeves the explosion-proof device on a porcelain sleeve type cable terminal, the distance between the upper fixing sleeve (2) and the lower fixing sleeve (5) is adjusted according to the length of the cable terminal, then the upper fixing sleeve (2) and the lower fixing sleeve (5) are fixed at two ends of the cable terminal, the worker firstly rotates the inner rotating ring (10), the inner rotating ring (10) rotates to drive the other end of the inner protection rib (7) to rotate, so that the inner protection rib (7) bends, the inner protection rib (7) forms a spiral structure under the support of the inner support rod (6), then a top screw is screwed to fix the inner rotating ring, the inner protection rib (7) is fixed, the worker then reversely rotates the outer rotating ring, the outer rotating ring rotates to drive the other end, the outer protection ribs (3) are bent, the outer protection ribs (3) form a spiral structure opposite to the inner protection ribs (7) under the support of the outer support rods (4) and are staggered with the spiral inner protection ribs (7) to form a net-shaped structure, a person tightens a top screw to fix the outer fixing ring and further fix the outer protection ribs (3), and the person can adjust the size of the formed protection net holes by adjusting the rotating angles of the inner rotating ring (10) and the outer rotating ring (1);
when explosion happens, the protective net formed by the inner protective ribs (7) and the outer protective ribs (3) blocks explosion fragments, the fire behavior is blocked, the influence on cables is avoided, and meanwhile, the small dry powder fire extinguishing balls (9) on the inner support rods (6) are heated and exploded to enable dry powder to be scattered out to extinguish fire, so that the explosion is effectively suppressed;
example 2:
the difference between this example and example 1 is: a telescopic inner telescopic rod (12) is arranged on the inner supporting rod (6), and a telescopic outer telescopic rod (14) is arranged on the outer supporting rod (4); when the telescopic protective device is used, the telescopic adaptation can be carried out according to the distance between the upper fixing sleeve (2) and the lower fixing sleeve (5), and the outer protective rib (3) and the inner protective rib (7) are conveniently supported;
the sliding insertion block and the sliding insertion slot (11) are designed to limit the outer rotating ring (1) and the inner rotating ring (10);
the outer diameter of the upper fixing sleeve (2) is smaller than that of the lower fixing sleeve (5), so that the outer rotating ring (1) and the inner rotating ring (10) can be conveniently placed on the upper fixing sleeve (2);
the inner diameter of the upper fixing sleeve (2) is equal to that of the lower fixing sleeve (5), and the inner diameter of the upper fixing sleeve is matched with that of the lower fixing sleeve when the upper fixing sleeve is sleeved on the porcelain sleeve type cable terminal;
the outer protection rib (3) is made of an elastic bendable material, and the inner protection rib (7) is made of an elastic bendable material, so that a spiral structure is formed conveniently, and the length of the explosion-proof device is adjusted conveniently;
the lengths of the outer stay bar (4) and the inner stay bar (6) are smaller than that of the inner protection rib (7), so that the upper fixing sleeve (2) and the lower fixing sleeve (5) can be contracted and adjusted according to different terminal head lengths;
the inner wall of the upper fixing sleeve (2) is provided with an anti-skid pad, and the inner wall of the lower fixing sleeve (5) is provided with the anti-skid pad, so that the upper fixing sleeve (2) and the lower fixing sleeve (5) are better fixed on a high-pressure terminal head, and the anti-explosion effect is prevented from being influenced by the sliding and rotating of the upper fixing sleeve (2) and the lower fixing sleeve (5);
the placing sleeve (13) is designed to be an elastic opening sleeve, fire extinguishing balls with different sizes can be placed, and the placing sleeve (13) can be deformed and expanded to a certain degree according to the diameter of the fire extinguishing balls and is convenient to place;
the design of embedded teeth is arranged on the wall of the opening sleeve, so that a fire extinguishing ball can be embedded, and the fire extinguishing ball is further prevented from falling off;
the inner protection ribs (7) and the outer protection ribs (3) are matched with the inner rotating ring (10) and the outer rotating ring (1), and the spiral angles of the inner protection ribs (7) and the outer protection ribs (3) can be adjusted according to requirements so as to adjust the overall length of the explosion-proof device and adapt to requirements;
the inner stay bar (6) and the outer stay bar (4) are matched with the small dry powder fire extinguishing ball (9), so that the fire extinguishing ball can explode to extinguish fire after being heated, and the explosion is inhibited;
the outer rotating ring (1) and the inner rotating ring (10) are rotated, and the outer rotating ring (1) and the inner rotating ring (10) are designed to have opposite rotating directions, so that the outer protective ribs (3) and the inner protective ribs (7) have opposite spiral directions, and are further staggered to form a mesh structure to be wrapped on the cable terminal;
the protective net blocks explosion fragments, and the small dry powder fire extinguishing ball (9) is designed to be heated and exploded, so that the fire is extinguished by matching with dry powder while the cable terminal is protected, and the fire is inhibited;
the aim of adjusting the whole length of the explosion-proof device through the upper fixed sleeve (2) and the lower fixed sleeve (5) with adjustable intervals and effectively inhibiting flame by matching with the small dry powder fire extinguishing ball (9) is achieved.
The above embodiments are preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that changes may be made without departing from the scope of the invention, and it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.
It should be further noted that, while the above specific embodiments are described for simplicity and clarity, only the differences from other embodiments are described, but those skilled in the art should understand that the above specific embodiments are independent technical solutions.

Claims (10)

1. The utility model provides a high tension cable terminal explosion-proof equipment which characterized by: one end of a plurality of outer support rods is vertically arranged on the lower fixing sleeve, the outer support rods are distributed at equal angles, the other end of each outer support rod vertically extends upwards, a plurality of outer protection ribs are spirally wound on the outer support rods at equal angles, one end of each outer protection rib is connected with the lower fixing sleeve, one end of each inner support rod is vertically arranged on the lower fixing sleeve, a plurality of inner support rods are distributed at equal angles, the inner support rods are positioned in a circle formed by the support rods in a surrounding manner, the other end of each inner support rod vertically extends upwards, a plurality of inner protection ribs are spirally wound on the inner support rods, the inner protection ribs are positioned between the outer support rods and the inner support rods, one ends of the inner protection ribs are connected with the lower fixing sleeve, a plurality of placing sleeves are fixedly arranged on the inner support rods and distributed at equal intervals, a plurality of small dry powder fire extinguishing balls are clamped in the placing sleeves in a one-to-one correspondence manner, the upper fixing sleeve is positioned above the lower, a set of smooth inserted block comprises two smooth inserted blocks, the rotatable cover of outer change ring is arranged in and is sheathe in, it has two to slide the slot to open on the outer change ring inner wall, the rotatable cover of inner change ring is arranged in on the fixed cover, and be located the bottom of outer change ring, it has two to slide the slot to open on the inner change ring inner wall, two sets of smooth inserted blocks insert respectively and arrange in the outer change ring and the interior slip slot on the inner change ring inner wall in, outer change ring bottom is connected with the other end of a plurality of outer protection muscle, inner change ring bottom is connected with the other end of a plurality of inner protection muscle, the spiro union has a plurality of set screws that the angle distributes equally on the outer change ring, the spiro union has a plurality of set screws that the angle distributes equally on the inner change ring.
2. The explosion-proof device for the high-voltage cable terminal as claimed in claim 1, wherein the inner supporting rod is provided with a telescopic inner telescopic rod, and the outer supporting rod is provided with a telescopic outer telescopic rod, so that when in use, the explosion-proof device can be flexibly adapted according to the distance between the upper fixing sleeve and the lower fixing sleeve, thereby facilitating the support of the outer protective rib and the inner protective rib.
3. The explosion vent for a high voltage cable terminal as recited in claim 1, wherein the outer rotary ring and the inner rotary ring are rotated in opposite directions, such that the outer protective ribs and the inner protective ribs are spirally wound in opposite directions and are interlaced to form a mesh structure to wrap the cable terminal;
the protection network blocks explosion fragments, and small-size dry powder fire extinguishing ball receives the thermal explosion, when protecting cable terminal, and the cooperation dry powder is put out a fire, suppresses the condition of a fire.
4. The explosion protection device for a high-voltage cable terminal as claimed in claim 1, wherein the outer protective rib is made of an elastic bendable material, and the inner protective rib is made of an elastic bendable material, so as to form a spiral structure and facilitate length adjustment of the explosion protection device.
5. The explosion vent for a high-voltage cable terminal as recited in claim 3, wherein the length of said outer protective rib is greater than the length of said inner protective rib, and the length of said outer stay and said inner stay are less than the length of said inner protective rib.
6. The explosion-proof device for the high-voltage cable terminal according to claim 1, wherein the placing sleeve is an elastic opening sleeve, and fire extinguishing balls with different sizes can be placed in the placing sleeve, so that the placing sleeve can be deformed and opened to a certain extent according to the diameter of the fire extinguishing balls and is convenient to place.
7. A high voltage cable termination explosion vent according to claim 6, wherein the wall of the split sleeve has embedded teeth.
8. A high voltage cable termination explosion vent according to claim 1 or 2, wherein the outer diameter of the outer swivel is greater than the outer diameter of the inner swivel.
9. The explosion vent for a high voltage cable terminal as recited in claim 1, wherein said upper retaining sleeve has a non-slip mat disposed on an inner wall thereof, said lower retaining sleeve has a non-slip mat disposed on an inner wall thereof, and said upper retaining sleeve has an outer diameter smaller than that of said lower retaining sleeve.
10. The explosion vent for a high voltage cable terminal as recited in claim 9, wherein the inner diameter of said upper retainer is equal to the inner diameter of said lower retainer, and the outer diameter of said outer swivel is equal to the outer diameter of said lower retainer.
CN201911053073.6A 2019-10-31 2019-10-31 Explosion-proof device for high-voltage cable terminal Active CN110752574B (en)

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Application Number Priority Date Filing Date Title
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CN110752574B true CN110752574B (en) 2020-10-30

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Publication number Priority date Publication date Assignee Title
CN113130128B (en) * 2021-04-16 2022-08-23 上海永进电缆(集团)有限公司 Flame-retardant fire-resistant anti-radiation cable for nuclear power station

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SI8912397A (en) * 1989-12-18 1997-08-31 Tase Lazovski Injection Syringe with a Shield
JP3786594B2 (en) * 2001-10-01 2006-06-14 矢崎総業株式会社 Electromagnetic shield braid
US7576286B2 (en) * 2006-03-29 2009-08-18 Federal-Mogul World Wide, Inc. Protective sleeve fabricated with hybrid yarn having wire filaments and methods of construction
CN202103372U (en) * 2010-12-15 2012-01-04 北京金风科创风电设备有限公司 Cable protective sleeve and protective device
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