CN211183369U

CN211183369U - Fireproof cable joint

Info

Publication number: CN211183369U
Application number: CN202020026325.8U
Authority: CN
Inventors: 徐季新; 黄建卫; 邱金波; 张天成; 黄桂领; 王世军
Original assignee: Zhejiang Zetastone Special Cable Co ltd
Current assignee: Zhejiang Zetastone Special Cable Co ltd
Priority date: 2020-01-07
Filing date: 2020-01-07
Publication date: 2020-08-04
Anticipated expiration: 2030-01-07

Abstract

The utility model relates to the technical field of high-voltage power cable joint protection, in particular to a fireproof cable joint, which comprises a connector, a wire core sleeved in the connector and a sleeve arranged on the connector, wherein the connector is provided with a first through hole, the wire core is sleeved in the first through hole, the sleeve comprises a first sleeve and a second sleeve, the two ends of the connector are provided with external threads, the first sleeve and the second sleeve are both provided with internal threads matched with the external threads, the connector is provided with a plurality of blind holes, the bottom end of the blind hole is provided with a second through hole, a spring is fixedly connected in the blind hole, a limiting rod is arranged in the blind hole, the limiting rod passes through the spring, one end of the limiting rod is positioned in the second through hole, the other end of the limiting rod is positioned outside the blind hole, the sleeve is provided with an annular groove, the middle of the connector is provided with an annular groove, the fire extinguishing substance is remained at the cable joint part and is difficult to clean.

Description

Fireproof cable joint

Technical Field

The utility model relates to a high voltage power cable connects protection technical field, especially relates to a cable joint of fire prevention.

Background

With the high-speed development of national economy, the popularization degree of power grid cabling is higher and higher, more and more cables are concentrated in cable trenches and cable wells or are laid under the ground side by side, and because the length of a single cable is limited, one or more joints are usually needed on one line to increase the length, so that the power supply requirement is met.

At present, the traditional cable joint protection method has two modes of glue filling and a buckle type shell made of high-strength SMC materials, wherein the glue filling mode is that a glass fiber reinforced plastic outer cover with an energy unloading hole is additionally arranged outside a joint, the outer cover is filled with AB glue through the energy unloading hole, when a cable joint breaks down, electric arcs are generated, fire occurs, insulation breakdown is caused, the AB glue leaks to solidify and then completely seals and wraps the cable joint, the mode can achieve the purposes of fire prevention and water prevention, but the mode enables the AB glue to be fixed at the cable joint, and the cleaning is difficult.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a cable joint of fire prevention for solve current cable joint extinguishing device after putting out a fire, the fire extinguishing substance remains at the cable joint position, the difficult problem of clearing up.

The utility model discloses an above-mentioned technical problem is solved to following technical means:

a fireproof cable joint comprises a connector, a wire core sleeved in the connector and a sleeve arranged on the connector, wherein a first through hole is formed in the connector, the wire core is sleeved in the first through hole, the sleeve comprises a first sleeve and a second sleeve, the first sleeve and the second sleeve are identical in structure, internal threads are formed in two ends of the connector, internal threads matched with external threads are formed in the first sleeve and the second sleeve, a plurality of blind holes are formed in the connector, a second through hole is formed in the bottom end of each blind hole and communicated with the first through hole, a spring is fixedly connected in each blind hole, a limiting rod penetrates through each blind hole and penetrates through the spring, one end of each limiting rod is located in the corresponding second through hole, the other end of each limiting rod is located outside the corresponding blind hole, and an annular groove with a trapezoidal cross section is formed in one side of the external threads on the sleeve, the utility model discloses a fire extinguishing device, including annular groove, connector, ring channel, fire extinguishing device, upper casing, lower casing, first recess has been seted up to the annular groove corresponding with the gag lever post, the ring channel has been seted up to the centre of connector, install extinguishing device on the ring channel, extinguishing device includes casing and lower casing, the casing intussuseption is filled with quartz sand, the other end of upper casing has seted up first recess, wear to be equipped with.

Further, go up the first journal stirrup of one end fixedly connected with of casing, the corresponding other end fixedly connected with second journal stirrup of casing down, rotate between first journal stirrup and the second journal stirrup and install the rotation post, set up like this, make and go up the casing and can rotate on casing down, conveniently open the casing, inspect, change the quartz sand state in the casing.

Further, the lower shell is rotatably installed with a boss relative to the position of the baffle, a third groove is formed in the boss, a universal ball is rotatably installed at the third groove on the boss, a rotating rod is fixedly connected to the universal ball, a second groove is formed in the baffle, and the rotating rod is clamped into the second groove and is arranged in such a way that the baffle cannot be easily loosened.

Further, the bottom integrated into one piece of casing has the flat board down, sets up like this, makes extinguishing device can stably place on ground, and can distinguish casing and lower casing.

Further, the gag lever post includes wedge and gangbar, the gangbar passes the spring and wears to establish in the second through-hole, the one end of spring offsets with the one side of wedge, and the other end sets up like this with blind hole bottom surface fixed connection, makes the gag lever post can self return under the effect of spring.

Further, spacing hole has been seted up to first telescopic one end, spacing hole and first through-hole intercommunication, wear to be equipped with the sealing washer in the spacing hole, the sinle silk protective sheath is worn to establish in spacing hole, sets up like this, makes sealing washer and sinle silk protective sheath in close contact with, avoids the entering of rainwater.

The utility model discloses a cable joint of fire prevention, through set up the ring channel in the middle part of connector, install extinguishing device on the ring channel, extinguishing device divide into upper casing and lower casing, pack quartz sand in the upper casing, the lower casing is vacant, once two cable core contact positions produce electric arc, high temperature is on fire, electric arc punctures the middle part of the weaker on the connector and the position that extinguishing device and connector contacted, makes quartz sand leak, leaks into the lower casing after putting out the position on fire, avoided current cable joint extinguishing device after putting out the position on fire, the fire extinguishing substance remains at cable joint position, the difficult problem of clearing up; internal threads are formed in two ends of the annular groove through the connecting head, external threads matched with the internal threads are formed in the first sleeve and the second sleeve, a blind hole and a second through hole are formed in the connecting head, a spring is connected in the blind hole, and the limiting rod penetrates through the spring and is located in the second through hole, so that the limiting rod can be extruded when the sleeves are screwed, and therefore the wire cores in the first through hole are fastened, on one hand, the fastening connection of the two wire cores is guaranteed, and on the other hand, the wire cores with different cross sections can be fixed; through set up spacing hole on the sleeve, the sealing washer is established to spacing downthehole cover, and the sinle silk protective sheath penetrates spacing hole to make sinle silk protective sheath and sealing washer in close contact with, avoid external rainwater to get into.

Drawings

Fig. 1 is a schematic structural view of a fireproof cable joint according to the present invention;

fig. 2 is an exploded view of a fire-resistant cable joint according to the present invention;

fig. 3 is a schematic cross-sectional view of a connector of a fireproof cable joint according to the present invention;

fig. 4 is a schematic cross-sectional view of a first sleeve of a fire-resistant cable joint of the present invention;

fig. 5 is an exploded view of a fire extinguishing apparatus of a cable joint for preventing fire according to the present invention;

FIG. 6 is an enlarged schematic view of the structure at A in FIG. 5;

FIG. 7 is an enlarged view of the structure at B in FIG. 5;

fig. 8 is a schematic cross-sectional view of a fire extinguishing apparatus of a cable joint for preventing fire according to the present invention;

fig. 9 is a schematic view of a connection structure of a position-limiting rod of a fireproof cable joint according to the present invention;

the fire extinguishing device comprises a wire core 1, a sleeve 2, a first sleeve 201, a second sleeve 202, a limiting hole 203, a fire extinguishing device 3, an upper shell 301, a lower shell 302, a first groove 303, a baffle 304, a second groove 305, a flat plate 306, a first lug 307, a second lug 308, a rotating column 309, a connector 4, a blind hole 401, an annular groove 402, a first through hole 403, a second through hole 404, a sealing ring 5, a boss 6, a third groove 601, a universal ball 602, a rotating rod 603, a limiting rod 7, a wedge block 701, a linkage rod 702 and a spring 8.

Detailed Description

The invention will be described in detail with reference to the following drawings and specific embodiments:

as shown in fig. 1-9, the utility model discloses a cable joint of fire prevention, including connector 4, cup joint sinle silk 1 in connector 4 and install sleeve 2 on the connector, seted up first through-hole 403 on connector 4, sinle silk 1 cover is established in first through-hole 403. The sleeve 2 comprises a first sleeve 201 and a second sleeve 202, and the first sleeve 201 and the second sleeve 202 are identical in structure and are respectively installed at two ends of the connecting head 4. Spacing hole 203 has been seted up to the one end of first sleeve 201, and spacing hole 203 and first through-hole 403 intercommunication wear to be equipped with sealing washer 5 in the spacing hole 203, and the sinle silk protective sheath is worn to establish in spacing hole 203, makes sinle silk protective sheath and 5 in close contact with of sealing washer, avoids the entering of rainwater. An annular groove 402 is formed in the middle of the connecting head 4, and the fire extinguishing device 3 is installed on the annular groove 402.

The fire extinguishing device 3 comprises an upper shell 301 and a lower shell 302, wherein one end of the upper shell 301 is fixedly connected with a first lug 307, the other corresponding end of the lower shell 302 is fixedly connected with a second lug 308, and a rotating column 309 is rotatably arranged between the first lug 307 and the second lug 308, so that the upper shell 301 can rotate on the lower shell 302. The upper shell 301 is filled with quartz sand, the other end of the upper shell 301 is provided with a first groove 303, and the first groove 303 is internally provided with a baffle 304 in a penetrating manner, so that the quartz sand is stably filled in the upper shell 301. Lower casing 302 rotates for the position of baffle 304 and installs boss 6, has seted up third recess 601 on the boss 6, rotates in third recess 601 department on the boss 6 and installs universal ball 602, fixedly connected with dwang 603 on the universal ball 602, has seted up second recess 305 on the baffle 304, rotates dwang 603 and makes dwang 603 go into in the second recess 305 to it is firm with casing 301 connection down to go up casing 301. The bottom end of the lower housing 302 is integrally formed with a flat plate 306, which enables the lower housing 302 to be stably placed on the ground and can distinguish the upper housing 301 from the lower housing 302.

External threads are arranged at two ends of the annular groove 402 on the connector 4, internal threads matched with the external threads are arranged on the first sleeve 201 and the second sleeve 202, the first sleeve 201 is in threaded connection on the left side of the connector 4, the second sleeve 202 is in threaded connection on the right side of the connector 4, a plurality of blind holes 401 are arranged on the connector 4, the second through hole 404 is arranged at the bottom end of the blind hole 401, and the second through hole 404 is communicated with the first through hole 403. The spring 8 is fixedly connected in the blind hole 401, the limiting rod 7 penetrates through the blind hole 401, and the limiting rod 7 comprises a wedge-shaped block 701 and a linkage rod 702, so that the linkage rod 702 penetrates through the spring 8 and penetrates through the second through hole 404. One end of the spring 8 is abutted against one surface of the wedge block 701, and the other end of the spring is fixedly connected with the bottom surface of the blind hole 401, so that the limiting rod 7 can automatically return under the action of the spring 8. The sleeve 2 is provided with an annular groove 204 with a trapezoidal cross section on one side of the external thread, the annular groove 204 corresponds to the position of the limiting rod 7, so that the sleeve 2 is gradually steeper and steeper in slope against the limiting rod 7 along with the advance of the sleeve 2 when being connected in a rotating manner, the limiting rod 7 is extruded, and the length of the linkage rod 702 extending out of the first through hole 403 is longer, so that the wire cores 1 with different cross sections can be fixed.

The utility model discloses a use method as follows: when the cable connector is used, a prepared cable core 1 is inserted into one end of the connector 4, the first sleeve 201 is sleeved on the connector 4 from the left side, the first sleeve 201 is rotated, the limiting rod 7 is abutted against the annular groove 204, and the cable core 1 on the left side is fastened; inserting the other wire core 1 into the other end of the connector 4 to enable the two wire cores 1 to abut against each other, sleeving the second sleeve 202 on the connector 4 from the right side, rotating the second sleeve 202 to enable the limiting rod 7 to abut against the annular groove 204, so that the wire core 1 on the right side is fastened, and the two wire cores 1 are tightly connected; 3 joints of extinguishing device 3 that will have filled the quartz sand are in the ring channel 402 in the middle of connector 4, rotating dwang 603 on the casing 302 down, make the second recess 305 on the dwang 603 card income baffle 304, thereby make extinguishing device 3 stable mounting on connector 4, in case break down, the place of two sinle silk 1 contacts produces electric arc, the high temperature is on fire, electric arc punctures the position that weaker middle part and extinguishing device 3 contacted with connector 4 on the connector 4, make the quartz sand leak, leak into casing 302 down after putting out the position of on fire, avoided current cable joint extinguishing device after putting out the fire, the fire extinguishing substance remains at the cable joint position, the problem of difficult clearance.

Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will understand that the present invention can be modified or replaced with other embodiments without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims. The technology, shape and construction parts which are not described in detail in the present invention are all known technology.

Claims

1. The utility model provides a cable joint of fire prevention, includes connector (4), cup joints sinle silk (1) in connector (4) and installs sleeve (2) on connector (4), its characterized in that: the connector (4) is provided with a first through hole (403), the wire core (1) is sleeved in the first through hole (403), the sleeve (2) comprises a first sleeve (201) and a second sleeve (202), the first sleeve (201) and the second sleeve (202) are of the same structure, the connector (4) is provided with an external thread, the first sleeve (201) and the second sleeve (202) are both provided with an internal thread matched with the external thread, the connector (4) is provided with a plurality of blind holes (401), the bottom end of each blind hole (401) is provided with a second through hole (404), the second through hole (404) is communicated with the first through hole (403), a spring (8) is fixedly connected in each blind hole (401), a limiting rod (7) is arranged in each blind hole (401) in a penetrating manner, the limiting rod (7) penetrates through the spring (8), one end of the limiting rod (7) is positioned in the second through hole (404), the other end is located the blind hole (401) outward, seted up in external screw thread one side on sleeve (2) that the cross-section is trapezoidal annular groove (204), annular groove (204) are corresponding with gag lever post (7), ring channel (402) have been seted up to the centre of connector (4), install extinguishing device (3) on ring channel (402), extinguishing device (3) are including casing (301) and lower casing (302), it is filled with quartz sand to go up casing (301) intussuseption, first recess (303) have been seted up to the other end of going up casing (301), wear to be equipped with baffle (304) in first recess (303).

2. A fire resistant cable joint according to claim 1, wherein: one end of the upper shell (301) is fixedly connected with a first support lug (307), the other end of the lower shell (302) corresponding to the first support lug is fixedly connected with a second support lug (308), and a rotating column (309) is rotatably arranged between the first support lug (307) and the second support lug (308).

3. A fire resistant cable joint according to claim 2, wherein: lower casing (302) rotate for the position of baffle (304) and install boss (6), third recess (601) have been seted up on boss (6), on boss (6) locate to rotate in third recess (601) and install universal ball (602), fixedly connected with dwang (603) on universal ball (602), second recess (305) have been seted up on baffle (304), dwang (603) card is gone into in second recess (305).

4. A fire resistant cable joint according to claim 3, wherein: the bottom end of the lower shell (302) is integrally formed with a flat plate (306).

5. A fire resistant cable joint according to claim 4, wherein: the limiting rod (7) comprises a wedge block (701) and a linkage rod (702), the linkage rod (702) penetrates through the spring (8) and penetrates through the second through hole (404), one end of the spring (8) is abutted to one side of the wedge block (701), and the other end of the spring is fixedly connected with the bottom surface of the blind hole (401).

6. A fire resistant cable joint according to claim 5, wherein: spacing hole (203) have been seted up to the one end of first sleeve (201), spacing hole (203) and first through-hole (403) intercommunication, wear to be equipped with sealing washer (5) in spacing hole (203), the sinle silk protective sheath is worn to establish in spacing hole (203).