CN215069389U

CN215069389U - Fireproof and compression-resistant cable

Info

Publication number: CN215069389U
Application number: CN202120675029.5U
Authority: CN
Inventors: 王景阳; 郭林祥
Original assignee: Jiangxi Nanyuan Cable Co ltd
Current assignee: Jiangxi Nanyuan Cable Co ltd
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-12-07
Anticipated expiration: 2031-04-02

Abstract

The utility model discloses a fireproof compression-resistant cable, belonging to the technical field of cables, which comprises a protective sleeve, a cable core positioned in the protective sleeve, a compression-resistant plate, a compression-resistant mechanism, a pushing mechanism and a side supporting mechanism; the protective sleeve comprises an outer protective layer, a flame-retardant layer and an inner protective layer which are sequentially arranged from outside to inside, the compression-resistant plate comprises a first compression-resistant plate and a second compression-resistant plate, the cross section of the protective sleeve is elliptical, the first compression-resistant plate and the second compression-resistant plate are respectively positioned at two ends of a short shaft of the protective sleeve, and the side supporting mechanisms are positioned at two ends of a long shaft of the protective sleeve; the compression-resistant mechanism and the pushing mechanism are both located between the first compression-resistant plate and the second compression-resistant plate, the first compression-resistant plate and the second compression-resistant plate are close to each other, and the compression-resistant mechanism drives the pushing mechanism to push the cable core to two ends of the long shaft of the protective sleeve, so that the cable core pushes the side supporting mechanism to two ends of the long shaft of the protective sleeve. The utility model provides a relatively poor problem of traditional cable resistance to compression, fire behavior.

Description

Fireproof and compression-resistant cable

Technical Field

The utility model relates to the technical field of cables, more specifically say, it relates to a fire prevention resistance to compression type cable.

Background

The power cable is used for transmitting and distributing electric energy, and is commonly used for urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and power transmission lines under river-crossing seawater. In the power lines, the cable is increasing in specific gravity. Power cables are cable products used in the trunk lines of power systems to transmit and distribute high power electrical energy, including various voltage classes, 1-500KV and above, and various insulated power cables.

The existing cable generally comprises a cable core and a sheath, is simple in structure and cannot play a good compression-resistant role, so that the cable is easy to trample by passers-by or roll by vehicles in some environments without erecting the cable, for example, in construction sites where the cable is constructed, the cable is deformed and even broken, and the cable does not have a good fireproof effect.

In view of this, the utility model provides a fire prevention resistance to compression type cable.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a fire prevention resistance to compression type cable, it has solved the relatively poor problem of traditional cable resistance to compression, fire behavior.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a fireproof compression-resistant cable comprises a protective sleeve and a cable core positioned in the protective sleeve, and further comprises a compression-resistant plate, a compression-resistant mechanism, a pushing mechanism and a side supporting mechanism;

the protective sleeve comprises an outer protective layer, a flame-retardant layer and an inner protective layer which are sequentially arranged from outside to inside, the flame-retardant layer is an aluminum foil, the pressure-resistant plate is positioned in the protective sleeve and is attached to the side wall of the inner protective layer, the pressure-resistant plate comprises a first pressure-resistant plate and a second pressure-resistant plate, the cross section of the protective sleeve is elliptical, the first pressure-resistant plate and the second pressure-resistant plate are respectively positioned at two ends of a short shaft of the protective sleeve, and the side supporting mechanisms are positioned at two ends of the long shaft of the protective sleeve;

resistance to compression mechanism with pushing mechanism all is located between first resistance to compression board and the second resistance to compression board, pushing mechanism is located resistance to compression mechanism's relative both sides just are in resistance to compression mechanism with between the cable core, the connecting rod is used for connecting resistance to compression mechanism both sides pushing mechanism, first resistance to compression board with the second resistance to compression board is close to the in-process each other, resistance to compression mechanism will drive pushing mechanism to protective sheath major axis both ends promote the cable core, so that the cable core to protective sheath major axis both ends promote side supporting mechanism.

More preferably: the compression-resistant mechanism comprises a first spring, a second spring, a pressure plate and a third spring;

the pressing plate comprises a first pressing plate and a second pressing plate, the first spring is connected between the first pressing plate and the first pressing plate, the second spring is connected between the second pressing plate and the second pressing plate, and the third spring is connected between the first pressing plate and the second pressing plate.

More preferably: the pushing mechanism comprises a fourth spring, a fifth spring, a pushing plate, a connecting strip and a limiting strip;

the limiting strips comprise a first limiting strip and a second limiting strip, openings matched with the pushing plate are formed in the first limiting strip and the second limiting strip, the fourth spring is connected between the first pressure resisting plate and the first limiting strip, the fifth spring is connected between the second pressure resisting plate and the second limiting strip, and the connecting strip is fixed between the first limiting strip and the second limiting strip;

the pushing plate comprises a first pushing plate and a second pushing plate, the first pushing plate is inserted into an opening in the first limiting strip, one side of the first pushing plate is in contact with the cable core, the other side of the first pushing plate is provided with an inclined plane used for being in contact with the side face of the first pressing plate, the inclined plane inclines downwards towards the direction close to the first pressing plate, and the contact surface of the first pressing plate and the inclined plane is an inclined plane; the second pushing plate is inserted into the opening in the second limiting strip, one side of the second pushing plate is in contact with the cable core, the other side of the second pushing plate is provided with an inclined plane which is used for being in contact with the side face of the second pressing plate, the inclined plane inclines downwards towards the direction close to the second pressing plate, and the contact face of the second pressing plate and the inclined plane is an inclined plane.

More preferably: still include the connecting rod, pushing mechanism is provided with two, two pushing mechanism symmetry respectively sets up resistance to compression mechanism's relative both sides, the connecting rod is located first clamp plate with between the second clamp plate and both ends are fixed respectively two pushing mechanism on the connecting strip.

More preferably: the first pushing plate and the second pushing plate respectively comprise pushing plate bodies, first sliding strips and second sliding strips, the first sliding strips and the second sliding strips are respectively arranged on two opposite sides of the pushing plate bodies, the side wall of the opening is provided with first sliding grooves and second sliding grooves matched with the first sliding strips and the second sliding strips, the first sliding strips are embedded in the first sliding grooves and are in sliding fit with the first sliding grooves, the second sliding strips are embedded in the second sliding grooves and are in sliding fit with the second sliding grooves, and the length directions of the first sliding strips and the second sliding strips are consistent with the axial direction of the long shaft of the protective sleeve;

the cable pushing plate is characterized in that one side of the pushing plate body is provided with an inclined plane used for being in contact with the pushing plate, and the other side of the pushing plate body is provided with a cambered surface used for being in contact with the outer surface of the cable core.

More preferably: the push plate comprises a push plate body and is characterized by further comprising an air bag, one side of the cable core is in contact with the cambered surface of the push plate body, the other side of the cable core is in contact with the air bag, and the cable core is abutted between the air bag and the side supporting mechanism.

More preferably: the side supporting mechanism comprises an elastic sheet, a sliding part and a sliding groove;

the sliding groove is formed in the inner protective layer inner wall and located at two ends of the protective sleeve in the axial direction of the short shaft, the sliding portions are fixed on two opposite sides of the elastic piece, the sliding portions are embedded in the sliding groove and in sliding fit with the sliding groove, the elastic piece is an arc piece, the middle of the elastic piece is arched close to the direction of the air bag, and the air bag is in contact with the elastic piece.

More preferably: the cross section of the air bag is arc-shaped, the inner arc surface of the air bag is in contact with the cable core, and the outer arc surface of the air bag is in contact with the elastic sheet arch part.

More preferably: the opening is provided with a plurality ofly along cable length direction, all sliding connection has in each opening the slurcam.

More preferably: the thickness of the flame retardant layer is 0.3-0.8mm, and the thickness of the outer protective layer and the thickness of the inner protective layer are both 0.4-1.0 mm.

To sum up, the utility model discloses following beneficial effect has: the protective sleeve of the utility model adopts a three-layer structure design, and the outer protective layer can play better roles of water resistance, alkali resistance, acid resistance and the like; the flame-retardant layer can play a good flame-retardant effect, and can improve the fire resistance of the cable so as to enhance the use safety of the cable; the setting of interior protective layer is in order to cooperate the outer protective layer on the one hand to make fire-retardant layer press from both sides between outer protective layer and interior protective layer, so that form the protection to fire-retardant layer, on the other hand can play the secondary protection effect, with the barrier propterty of strengthening the protective sheath. Because the cable is the oval cable, therefore when laying, the preferred, the minor axis axial direction of protective sheath is vertical direction, and major axis axial direction is the horizontal direction, therefore first anti clamp plate and second anti clamp plate just are arranging from top to bottom in the protective sheath.

When the cable is trampled, rolled or acted by other external force from top to bottom, the first pressure resisting plate and the second pressure resisting plate are close to each other, so that the first pressure resisting plate and the second pressure resisting plate are driven to be close to each other, and at the moment, part of the external force is offset by the first spring, the second spring, the third spring, the fourth spring and the fifth spring. Because first clamp plate and the contact of first slurcam slant, second clamp plate and the contact of second slurcam slant, consequently first clamp plate and second clamp plate are close to the in-process each other, first slurcam and the second slurcam of first clamp plate and second clamp plate both sides will remove to the cable core direction, the cable core will remove to cable width direction's both sides gradually this moment, thereby promote gasbag and shell fragment, so that the shell fragment takes place to deform to another direction of hunch-up direction gradually, thereby offset surplus external force through gasbag and shell fragment, can effectively avoid the cable core to receive extrusion from top to bottom, can play better guard action to the cable core. The cable receives trampling, rolls or other exogenic effects from top to bottom and does the time spent, and oval cable will gradually become flat, therefore the sliding part will remove gradually in the sliding tray, and the shell fragment will support tightly in cable width direction's both sides this moment to can effectively avoid protective sheath width direction's both sides to break off.

When the cable receives the exogenic action of width direction to act on, the conduction direction of power just with when the cable receives trampling, rolls or other exogenic action from top to bottom the conduction direction of power opposite, consequently exogenic action can be offset by shell fragment, gasbag, first spring, second spring, third spring, fourth spring and fifth spring fast equally, can play better guard action to protective sheath and cable core. Thereby the problem that the traditional cable is poor in compression resistance and fireproof performance is solved.

Drawings

FIG. 1 is a schematic cross-sectional view of a cable cross-section of an embodiment, mainly used for embodying the internal structure of the cable;

FIG. 2 is a schematic sectional view of the embodiment, which is mainly used for embodying the matching structure among the pressure-resistant plate, the pressure-resistant mechanism and the pushing mechanism;

FIG. 3 is a schematic sectional view of an embodiment, which is mainly used for embodying the structure of the pushing plate;

fig. 4 is a partially sectional schematic view of the embodiment, which is mainly used for embodying the structure of the side supporting mechanism.

In the figure, 101, an outer protective layer; 102. a flame retardant layer; 103. an inner protective layer; 2. a cable core; 31. a spring plate; 32. a sliding part; 33. a sliding groove; 4. an air bag; 5. a pressure resistant plate; 51. a first pressure resistant plate; 52. a second pressure resistant plate; 6. a compression resistance mechanism; 61. a first spring, 62, a second spring; 631. a first platen; 632. a second platen; 64. a third spring; 7. a pushing mechanism; 71. a fourth spring; 72. a fifth spring; 731. a first push plate; 732. a second pusher plate; 733. a push plate body; 734. a cambered surface; 735. a bevel; 736. a first slide bar; 737. a second slide bar; 74. an opening; 75. a connecting strip; 761. a first limit strip; 762. a second limit strip; 8. a connecting rod.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

Example (b): a fireproof compression-resistant cable comprises a protective sleeve, a cable core 2, a compression-resistant plate 5, a compression-resistant mechanism 6, a pushing mechanism 7, a side supporting mechanism, a connecting rod 8 and an air bag 4, wherein the cable core is positioned in the protective sleeve. The protective sleeve comprises an outer protective layer 101, a flame-retardant layer 102 and an inner protective layer 103 which are sequentially arranged from outside to inside, wherein the flame-retardant layer 102 is an aluminum foil and is 0.3-0.8mm thick, and preferably, the flame-retardant layer 102 is 0.5mm thick. The thicknesses of the outer protective layer 101 and the inner protective layer 103 are both 0.4-1.0mm, and preferably, the thicknesses of the outer protective layer 101 and the inner protective layer 103 are both 0.9 mm. The pressure-resistant plate 5 is positioned in the protective sleeve and attached to the side wall of the inner protective layer 103, and the pressure-resistant plate 5 comprises a first pressure-resistant plate 51 and a second pressure-resistant plate 52. Specifically, the cross section of the protective sleeve is elliptical, the first pressure resisting plate 51 and the second pressure resisting plate 52 are respectively located at two ends of a short shaft of the protective sleeve, and the first pressure resisting plate 51 and the second pressure resisting plate 52 are both arc-shaped plates and are tightly attached to the side wall of the inner protective layer 103.

In the above technical solution, the protective sleeve of the present invention adopts a three-layer structure design, and the outer protective layer 101 can play a better role in water resistance, alkali resistance, acid resistance, etc.; the flame-retardant layer 102 can play a good flame-retardant role, and can improve the fire resistance of the cable so as to enhance the use safety of the cable; the inner protective layer 103 is arranged to cooperate with the outer protective layer 101, so that the flame retardant layer 102 is sandwiched between the outer protective layer 101 and the inner protective layer 103, so as to protect the flame retardant layer 102, and can play a secondary protection role to enhance the protection performance of the protective sleeve. Traditional cable is generally round cable or flat cable (ribbon cable), and when flat cable (ribbon cable) laid, the great both sides of external surface area generally were located top and bottom, consequently when receiving trampling or other exogenic actions, flat cable (ribbon cable)'s compressive capacity will be greater than round cable, for this reason, the utility model discloses combine the characteristics of round cable and flat cable (ribbon cable), designed the better elliptic cable of a compressive resistance.

Referring to fig. 1-4, the compression-resistant mechanism 6 and the pushing mechanism 7 are both located between the first compression-resistant plate 51 and the second compression-resistant plate 52, and the pushing mechanisms 7 are located on opposite sides of the compression-resistant mechanism 6 and between the compression-resistant mechanism 6 and the cable core 2. The cross section of the cable core 2 is circular and is provided with two, and the two cable cores 2 are both positioned between the first pressure resisting plate 51 and the second pressure resisting plate 52 and are both positioned on the axial direction of the long shaft of the protective sleeve. The side supporting mechanisms are positioned at two ends of the long shaft of the protective sleeve. In the process that the first pressure resisting plate 51 and the second pressure resisting plate 52 approach each other, the pressure resisting mechanism 6 drives the pushing mechanism 7 to push the cable core 2 towards the two ends of the long axis of the protective sleeve, so that the cable core 2 pushes the side supporting mechanism towards the two ends of the long axis of the protective sleeve, and at the moment, the side supporting mechanism moves towards the direction close to the center of the protective sleeve on the side wall of the inner protective layer 103. Thereby support fixedly to the both sides of oval cable width direction through side supporting mechanism to prevent that oval cable from continuing to flatten, cause the protective sheath fracture and cable core 2 to receive the extrusion of upper and lower direction.

Referring to fig. 1-4, specifically, the pressure resistance mechanism 6 includes a first spring 61, a second spring 62, a pressure plate, and a third spring 64. The pressure plates include a first pressure plate 631 and a second pressure plate 632, the first springs 61 are connected between the first pressure plate 51 and the first pressure plate 631, the second springs 62 are connected between the second pressure plate 52 and the second pressure plate 632, and the third springs 64 are connected between the first pressure plate 631 and the second pressure plate 632. The first pressure plate 631 and the second pressure plate 632 are symmetrically disposed on opposite sides of the long axis of the protective cover. On the long shaft of the protective sleeve, two first springs 61, two second springs 62 and two third springs 64 are arranged, and the two first springs 61, the two second springs 62 and the two third springs 64 are symmetrically arranged at two ends of the short shaft of the protective sleeve. The length direction of the first and second

pressing plates

631 and 632 is the same as the length direction of the cable, and a plurality of first, second, and

third springs

61, 62, and 64 are provided at equal intervals along the length direction of the cable.

Referring to fig. 1 to 4, the urging mechanism 7 includes a fourth spring 71, a fifth spring 72, an urging plate, a connecting bar 75, and a stopper bar. Spacing strip includes first spacing strip 761 and second spacing strip 762, and first spacing strip 761 and second spacing strip 762 symmetry set up in the relative both sides of protective sheath major axis, all offer the opening 74 with the pushing plate looks adaptation on first spacing strip 761 and the second spacing strip 762. The fourth spring 71 is connected between the first resistive pressing plate 51 and the first stopper 761, the fifth spring 72 is connected between the second resistive pressing plate 52 and the second stopper 762, and the connection bar 75 is fixed between the first stopper 761 and the second stopper 762. The pushing plate comprises a first pushing plate 731 and a second pushing plate 732, the first pushing plate 731 is inserted into the opening 74 on the first limiting strip 761, one side of the first pushing plate 731 is in contact with the cable core 2, the other side of the first pushing plate 731 is provided with an inclined surface 735 used for being in contact with the side surface of the first pressing plate 631, the inclined surface 735 inclines downwards towards the direction close to the first pressing plate 631, the contact surface of the first pressing plate 631 and the inclined surface 735 is an inclined surface, and the inclined surface is in surface-to-surface contact with the inclined surface 735. The second pushing plate 732 is inserted into the opening 74 of the second limiting strip 762, one side of the second pushing plate 732 contacts with the cable core 2, the other side of the second pushing plate 732 is provided with an inclined surface 735 for contacting with the side surface of the second pressing plate 632, the inclined surface 735 inclines downwards towards the direction close to the second pressing plate 632, the contact surface of the second pressing plate 632 and the inclined surface 735 is an inclined surface, and the inclined surface 735 are in surface-to-surface contact.

Referring to fig. 1-4, two pushing mechanisms 7 are provided, and the two pushing mechanisms 7 are symmetrically arranged on two opposite sides of the pressure-resisting mechanism 6 respectively. The connecting rod 8 is used for connecting the pushing mechanisms 7 on two sides of the compression-resistant mechanism 6, specifically, the connecting rod 8 is located between the first pressing plate 631 and the second pressing plate 632, and two ends of the connecting rod 8 are respectively fixed on the connecting strips 75 of the two pushing mechanisms 7, so that the two pushing mechanisms 7 are connected with each other, and the connecting rod 8 and the third spring 64 are arranged in a staggered manner. Each of the first and

second push plates

731 and 732 includes a push plate body 733, a first slide 736, and a second slide 737. The first sliding bar 736 and the second sliding bar 737 are respectively disposed on two opposite sides of the pushing plate body 733, the first sliding bar 736 is located on one side of the pushing plate body 733 close to the fourth spring 71, and the second sliding bar 737 is located on one side of the pushing plate body 733 close to the connecting bar 75. First spout and second spout with first draw runner 736 and second draw runner 737 looks adaptation are seted up to opening 74 lateral wall, and first draw runner 736 inlays in first spout and with first spout sliding fit, and second draw runner 737 inlays in the second spout and with second spout sliding fit. The first slide 736 and the second slide 737 both have a length that is aligned with the axial direction of the long axis of the sleeve. The pushing plate body 733 has a slope 735 for contacting with the pushing plate on one side and a curved surface 734 for contacting with the outer surface of the cable core 2 on the other side. In order to make the pushing plate closely fit to the cable core 2, it is preferable that the arc surface 734 is arc-fitted to the outer surface of the cable core 2 so that the arc surface 734 is in surface-to-surface contact with the cable core 2.

In the above technical solution, when the cable is laid, the short axis axial direction of the protective sheath is vertical, and the long axis axial direction is horizontal, so the first pressure resisting plate 51 and the second pressure resisting plate 52 are just arranged up and down in the protective sheath. When the cable is trampled, crushed or otherwise acted upon by an external force from top to bottom, the first pressure resisting plate 51 and the second pressure resisting plate 52 will move closer together, thereby driving the first pressure plate 631 and the second pressure plate 632 closer together. Since the first pressing plate 631 obliquely contacts the first pushing plate 731, and the second pressing plate 632 obliquely contacts the second pushing plate 732, when the first pressing plate 631 and the second pressing plate 632 approach each other, the first pushing plate 731 and the second pushing plate 732 on both sides of the first pressing plate 631 and the second pressing plate 632 will move toward the cable core 2, and at this time, the cable core 2 will gradually move toward both sides of the cable width direction, so that displacement occurs. First slide 736 and second slide 737 are configured to allow first pusher plate 731 and second pusher plate 732 to slide smoothly within opening 74. In order to enable the cable core 2 to stably move towards two ends of the long shaft of the protective sleeve, specifically, the length directions of the first limiting strip 761 and the second limiting strip 762 are consistent with the length direction of the cable, a plurality of openings 74 are arranged along the length direction of the cable, and a pushing plate is connected in each opening 74 in a sliding mode.

Referring to fig. 1-4, one side of the cable core 2 is in contact with the cambered surface 734 of the pushing plate body 733, the other side is in contact with the air bag 4, and the cable core 2 is abutted between the air bag 4 and the side supporting mechanism. Preferably, the side supporting mechanism includes a spring 31, a sliding portion 32 and a sliding groove 33. The sliding grooves 33 are formed in the inner wall of the inner protective layer 103 and located at two ends of the protective sleeve in the short axis direction, and the sliding grooves 33 are located on the outer sides of the first pressure resisting plate 51 and the second pressure resisting plate 52. The sliding portions 32 are integrally connected to opposite sides of the spring plate 31, and the sliding portions 32 are embedded in the sliding grooves 33 and are in sliding fit with the sliding grooves 33. The elastic sheet 31 is an arc sheet, the middle part of the elastic sheet arches towards the direction close to the air bag 4, the air bag 4 is contacted with the elastic sheet 31, and the elastic sheet 31 is supported on the short shaft axial direction of the protective sleeve. The cross section of the air bag 4 is arc-shaped, the inner arc surface 734 is contacted with the cable core 2, and the outer arc surface 734 is contacted with the arch part of the elastic sheet 31.

The compression resistance principle of the cable is as follows:

because the cable is an oval cable, when the cable is laid, preferably, the axial direction of the short axis of the protective sleeve is vertical, and the axial direction of the long axis is horizontal, so that the first pressure resisting plate 51 and the second pressure resisting plate 52 are just vertically arranged in the protective sleeve.

When the cable is subjected to trampling, crushing or other external force from top to bottom, the first pressure resisting plate 51 and the second pressure resisting plate 52 will approach each other, thereby driving the first pressure plate 631 and the second pressure plate 632 to approach each other, at which time part of the external force has been counteracted by the first spring 61, the second spring 62, the third spring 64, the fourth spring 71 and the fifth spring 72. Because first clamp plate 631 and first slushing plate 731 slant contact, second clamp plate 632 and second slushing plate 732 slant contact, consequently first clamp plate 631 and second clamp plate 632 are close to the in-process each other, first slushing plate 731 and the second slushing plate 732 of first clamp plate 631 and second clamp plate 632 both sides will move to cable core 2 direction, cable core 2 will gradually move to the both sides of cable width direction this moment, thereby promote gasbag 4 and shell fragment 31, so that shell fragment 31 takes place the deformation to another direction of hunch-up direction gradually, thereby offset remaining external force through gasbag 4 and shell fragment 31, can effectively avoid cable core 2 to receive extrusion from top to bottom, can play better guard action to cable core 2. The cable receives trampling, rolls or other exogenic action from top to bottom and acts on, and oval cable will gradually become flat, consequently sliding part 32 will remove gradually in sliding tray 33, and shell fragment 31 will support tightly in cable width direction's both sides this moment to can effectively avoid protective sheath width direction's both sides to break off.

When the cable is acted by external force in the width direction, the force transmission direction is just opposite to the force transmission direction when the cable is acted by trampling, rolling or other external force from top to bottom, so the external force can be quickly counteracted by the elastic sheet 31, the air bag 4, the first spring 61, the second spring 62, the third spring 64, the fourth spring 71 and the fifth spring 72, and the protective sleeve and the cable core 2 can be well protected.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should be construed as the scope of the present invention.

Claims

1. The utility model provides a fire prevention resistance to compression type cable, includes the protective sheath and is located cable core (2) in the protective sheath, its characterized in that: the device also comprises a compression-resistant plate (5), a compression-resistant mechanism (6), a pushing mechanism (7), a connecting rod (8) and a side supporting mechanism;

the protective sleeve comprises an outer protective layer (101), a flame-retardant layer (102) and an inner protective layer (103) which are sequentially arranged from outside to inside, the flame-retardant layer (102) is an aluminum foil, the pressure-resistant plate (5) is positioned in the protective sleeve and is attached to the side wall of the inner protective layer (103), the pressure-resistant plate (5) comprises a first pressure-resistant plate (51) and a second pressure-resistant plate (52), the cross section of the protective sleeve is elliptical, the first pressure-resistant plate (51) and the second pressure-resistant plate (52) are respectively positioned at two ends of a short shaft of the protective sleeve, and the side supporting mechanisms are positioned at two ends of a long shaft of the protective sleeve;

resistance to compression mechanism (6) with pushing mechanism (7) all are located between first resistance to compression board (51) and second resistance to compression board (52), pushing mechanism (7) are located the relative both sides of resistance to compression mechanism (6) and are in resistance to compression mechanism (6) with between cable core (2), connecting rod (8) are used for connecting resistance to compression mechanism (6) both sides pushing mechanism (7), first resistance to compression board (51) with second resistance to compression board (52) are close to the in-process each other, resistance to compression mechanism (6) will drive pushing mechanism (7) to the promotion of protective sheath major axis both ends cable core (2), so that cable core (2) to the promotion of protective sheath major axis both ends side supporting mechanism.

2. A fire-proof compression-resistant cable according to claim 1, wherein: the pressure-resistant mechanism (6) comprises a first spring (61), a second spring (62), a pressure plate and a third spring (64);

the pressure plate includes a first pressure plate (631) and a second pressure plate (632), the first spring (61) is connected between the first pressure resisting plate (51) and the first pressure plate (631), the second spring (62) is connected between the second pressure resisting plate (52) and the second pressure plate (632), and the third spring (64) is connected between the first pressure plate (631) and the second pressure plate (632).

3. A fire-proof compression-resistant cable according to claim 2, wherein: the pushing mechanism (7) comprises a fourth spring (71), a fifth spring (72), a pushing plate, a connecting strip (75) and a limiting strip;

the limiting strips comprise a first limiting strip (761) and a second limiting strip (762), the first limiting strip (761) and the second limiting strip (762) are respectively provided with an opening (74) matched with the pushing plate, the fourth spring (71) is connected between the first pressure resisting plate (51) and the first limiting strip (761), the fifth spring (72) is connected between the second pressure resisting plate (52) and the second limiting strip (762), and the connecting strip (75) is fixed between the first limiting strip (761) and the second limiting strip (762);

the pushing plates comprise a first pushing plate (731) and a second pushing plate (732), the first pushing plate (731) is inserted into an opening (74) in the first limiting strip (761), one side of the first pushing plate (731) is in contact with the cable core (2), the other side of the first pushing plate is provided with an inclined surface (735) used for being in contact with the side surface of the first pressing plate (631), the inclined surface (735) inclines downwards in the direction close to the first pressing plate (631), and the contact surface of the first pressing plate (631) and the inclined surface (735) is an inclined surface (735); the second pushing plate (732) is inserted into the opening (74) in the second limiting strip (762), one side of the second pushing plate (732) is in contact with the cable core (2), the other side of the second pushing plate (732) is provided with an inclined surface (735) used for being in contact with the side surface of the second pressing plate (632), the inclined surface (735) inclines downwards in the direction close to the second pressing plate (632), and the contact surface of the second pressing plate (632) in contact with the inclined surface (735) is an inclined surface (735).

4. A fire-proof compression-resistant cable according to claim 3, wherein: push mechanism (7) are provided with two, two push mechanism (7) symmetry respectively sets up the relative both sides of resistance to compression mechanism (6), connecting rod (8) are located first clamp plate (631) with between second clamp plate (632) and both ends are fixed respectively two push mechanism (7) on connecting strip (75).

5. A fire-proof compression-resistant cable according to claim 3, wherein: the first pushing plate (731) and the second pushing plate (732) both comprise a pushing plate body (733), a first sliding strip (736) and a second sliding strip (737), the first sliding strip (736) and the second sliding strip (737) are respectively arranged on two opposite sides of the pushing plate body (733), a first sliding groove and a second sliding groove matched with the first sliding strip (736) and the second sliding strip (737) are formed in the side wall of the opening (74), the first sliding strip (736) is embedded in the first sliding groove and is in sliding fit with the first sliding groove, the second sliding strip (737) is embedded in the second sliding groove and is in sliding fit with the second sliding groove, and the length directions of the first sliding strip (736) and the second sliding strip (737) are consistent with the axial direction of the long shaft of the protective sleeve;

the pushing plate comprises a pushing plate body (733), wherein one side of the pushing plate body (733) is provided with a slope (735) used for being in contact with the pushing plate, and the other side of the pushing plate body is provided with a cambered surface (734) used for being in contact with the outer surface of the cable core (2).

6. A fire-proof compression-resistant cable according to claim 5, wherein: the push plate is characterized by further comprising an air bag (4), one side of the cable core (2) is in contact with the arc surface (734) of the push plate body (733), the other side of the cable core is in contact with the air bag (4), and the cable core (2) is abutted between the air bag (4) and the side supporting mechanism.

7. A fire-proof compression-resistant cable according to claim 6, wherein: the side supporting mechanism comprises an elastic sheet (31), a sliding part (32) and a sliding groove (33);

the sliding groove (33) is formed in the inner wall of the inner protection layer (103) and located at two ends of the short shaft of the protection sleeve in the axial direction, the sliding portion (32) is fixed to two opposite sides of the elastic sheet (31), the sliding portion (32) is embedded in the sliding groove (33) and is in sliding fit with the sliding groove (33), the elastic sheet (31) is an arc sheet, the middle of the elastic sheet is close to the air bag (4) in the direction of arching, and the air bag (4) is in contact with the elastic sheet (31).

8. A fire-proof compression-resistant cable according to claim 7, wherein: the cross section of the air bag (4) is arc-shaped, an inner arc surface (734) is in contact with the cable core (2), and an outer arc surface (734) is in contact with the arch part of the elastic sheet (31).

9. A fire-proof compression-resistant cable according to claim 3, wherein: the openings (74) are arranged in a plurality along the length direction of the cable, and the pushing plate is connected in each opening (74) in a sliding mode.

10. A fire-proof compression-resistant cable according to claim 3, wherein: the thickness of the flame-retardant layer (102) is 0.3-0.8mm, and the thickness of the outer protective layer (101) and the thickness of the inner protective layer (103) are both 0.4-1.0 mm.