CN118249275A - Power cable fitting for restraining cable - Google Patents

Abstract

The invention relates to the technical field of cable fittings, in particular to a power cable fitting for restraining a cable. The power cable fitting of the constraint cable comprises an installation frame and a plurality of groups of pull-resistant components which are annularly distributed in the installation frame, and early warning components are arranged on the pull-resistant components. The power cable fitting for restraining the cable provided by the invention has the advantages that the hidden trouble that the cable is instantaneously stretched due to the fact that the cable is instantaneously pulled and loaded by animals or is greatly swung due to strong wind is avoided, the nitrogen generated by the sodium azide block reduces the vertical downward force of the cable at the pulling force position, so that the cable is greatly protected, meanwhile, the audible and visual alarm and the GPS locator can be driven to be started, the audible and visual alarm can remind personnel around the cable or the animals around the cable, and the GPS locator can facilitate the staff to know which cable has a problem in time, so that the staff can maintain the cable in time.

Description

Power cable fitting for restraining cable

Technical Field

The invention relates to the technical field of cable fittings, in particular to a power cable fitting for restraining a cable.

Background

The power cable is a cable for transmitting and distributing electric energy, and is generally used for urban underground power grids, power station outgoing lines, power supply in industrial and mining enterprises and power transmission lines under river crossing sea water. The main circuit plays a key role in a main circuit of a power system for transmitting and distributing high-power electric energy, and the basic structure of the power cable consists of four parts, namely a wire core (conductor), an insulating layer, a shielding layer and a protective layer. The wire core is a conductive part of the power cable and is used for conveying electric energy; the insulation layer electrically isolates the wire core from the ground and the wire cores with different phases, so that electric energy transmission is ensured; the shielding layer is mainly arranged in a power cable of 15kV and above and is used for preventing electromagnetic interference and improving the electrical performance of the cable; the protective layer is used for protecting the power cable from invasion of external impurities and moisture and preventing external force from directly damaging the power cable;

The spacing bars are additionally arranged between a plurality of power cables at present so as to fix the spacing of each cable, prevent wires from whipping each other, inhibit breeze vibration and secondary span vibration, but the potential hazards that a plurality of cables are easily broken in the moment because of being pulled, having animals to fall onto the cables or having no buffer margin when swinging greatly because of strong wind are easy to cause, and meanwhile, when a cable at a certain place is subjected to a load to reach an early warning value, workers cannot know that the cable at the certain place cannot be treated in time, so that the cable is damaged.

Therefore, there is a need to provide a new power cable fitting for restraining a cable that solves the above-mentioned technical problems.

Disclosure of Invention

In order to solve the technical problems, the invention provides a power cable fitting for restraining a cable.

The power cable fitting of the constraint cable provided by the invention comprises:

Mounting frame, and

The plurality of groups of pull-resistant components are annularly distributed in the mounting frame, the cable is reduced to break or be damaged due to external force pulling through the pull-resistant components, and each group of pull-resistant components is provided with an early warning component for early warning the cable to break or be damaged;

The pull-resisting component comprises a U-shaped plate, two symmetrically distributed and slidingly connected L-shaped wire curved plates are arranged on the U-shaped plate, a middle connecting plate is fixedly arranged between the two L-shaped wire curved plates, a sliding rod is fixedly arranged on the U-shaped plate, a rod head of the sliding rod penetrates through a through cavity formed in the middle connecting plate and is fixedly provided with a rod cap, and a spring A is arranged between the U-shaped plate and the middle connecting plate;

The early warning part comprises an erection plate, the erection plate is fixedly erected at an opening between two L-shaped wire curved plates, a sodium azide block is fixedly arranged at the bottom of the erection plate, an elastic fold impact-reducing air bag is fixedly embedded in the sodium azide block, an inner top frame is fixedly arranged on the erection plate, an audible-visual annunciator and a GPS (global positioning system) locator are respectively and fixedly arranged on two side walls of the inner top frame, and a contact seat for controlling the audible-visual annunciator and the GPS locator to be opened is arranged on the inner top wall of the inner top frame.

Preferably, the spring A is sleeved on the sliding rod, one end of the spring A is fixedly connected with the inner bottom wall of the U-shaped plate, and the other end of the spring A is fixedly connected with the lower plate wall of the middle connecting plate.

Preferably, the two sides of the U-shaped plate are fixedly provided with inserting plates, the two inserting plates are respectively inserted into the sliding grooves formed in the vertical plate sections of the two L-shaped wire bent plates and are in sliding connection with the sliding grooves, and the outer ring wall of the U-shaped plate, the outer wall of the inserting plates and the outer ring wall of the L-shaped wire bent plates are provided with cable grooves.

Preferably, two opposite ends of the L-shaped wire bent plate are respectively provided with a binding seat, the binding seats are fixedly connected with the horizontal plate ends of the L-shaped wire bent plate through connecting rods, an open slot is formed in each binding seat, and a rubber damping sleeve is fixedly embedded in each open slot.

Preferably, the erection plate is provided with a vent hole, an elastic fold airbag column is fixedly embedded on the erection plate at the hole position above the vent hole, a contact blade is fixedly arranged at the top of the elastic fold airbag column, the contact blade and the contact seat form a contact switch structure, and a power supply for supplying power to the contact seat, the audible-visual annunciator and the GPS localizer is also arranged on the inner top frame.

Preferably, the sodium azide block is positioned inside the elastic fold down-flushing air bag, and the elastic fold down-flushing air bag is communicated with the elastic fold air bag column through the vent hole.

Preferably, the bottom of the elastic fold undershoot air bag is fixedly embedded with an abutting disc, and the abutting disc and the sliding rod are coaxially arranged.

Preferably, the installation frame comprises a center connection column, threading plates are fixedly installed at two ends of the center connection column, a plurality of annular line through holes are formed in the threading plates, a plurality of annular installation cavities which are distributed in a radial mode are formed in the line through holes, and an abutting component is arranged in each installation cavity;

The abutting component comprises a sliding seat, the sliding seat is inserted in the installation cavity and is in sliding connection with the installation cavity, the outer extending end of the sliding seat is embedded with steel balls in rolling connection, the inserting end of the sliding seat is fixedly provided with a spring B, and the other end of the spring B is fixedly connected with the inner wall of the installation cavity.

Preferably, two binding seats in the pull-resistant component are respectively and fixedly connected with two threading plates in the mounting frame, and an open slot formed in each binding seat is coaxially arranged with the corresponding threading hole in the threading plate.

Preferably, the installation frame is provided with an elastic fold protection cover, two ends of the elastic fold protection cover are fixedly embedded with connecting frames, any connecting frame is fixedly embedded on the inner plate wall of the threading plate, the other connecting frame is provided with an installation hole, and the other threading plate is provided with a threaded hole corresponding to the installation hole.

Compared with the related art, the power cable fitting for restraining the cable has the following beneficial effects:

When the cable is pulled, the bearing animal or greatly swings due to strong wind, the cable pushes the U-shaped plate to slide to the L-shaped wire bent plate, so that the spring A compresses, and meanwhile, the reserved line segment can slide to the outer side of the threading plate to buffer the cable at the tight position, so that the hidden trouble that the cable is instantaneously stretched due to the fact that the cable is instantaneously pulled, the bearing animal or greatly swings due to strong wind is avoided;

2. According to the invention, a part of nitrogen generated by the sodium azide block can quickly expand the elastic fold impact reduction air bag of the fold, the impact force on the top of part of the sliding rod can be counteracted by the expanded elastic fold impact reduction air bag, so that the U-shaped plate which slides upwards to the highest point can slide downwards for a small distance, and a cable at the U-shaped plate and the cable at the position where the cable is pulled can form a pulling situation, so that the vertical downward force of the cable at the position where the cable is pulled is reduced, and the cable at the position is greatly protected;

3. According to the invention, the other part of nitrogen generated by the sodium azide block drives the elastic fold airbag column to push the contact blade to be inserted on the contact seat through the vent hole, so that the audible and visual alarm and the GPS positioner are started, the audible and visual alarm can remind personnel around the section of cable or dispel animals around the section of cable, and the GPS positioner can facilitate the staff to know which section of cable has a problem in time, so that the staff can maintain the section of cable in time.

Drawings

Fig. 1 is a schematic structural diagram of a power cable fitting of a constraint cable according to a preferred embodiment of the present invention;

FIG. 2 is a schematic view of the mounting structure of the barrier component and the warning component within the mounting frame of FIG. 1;

FIG. 3 is a schematic view of an installation structure of the early warning part on the pull-resistant part shown in FIG. 2;

FIG. 4 is a schematic elevational view of the structure shown in FIG. 3;

FIG. 5 is a schematic view of the pull block shown in FIG. 3;

FIG. 6 is a schematic view of a partial cross-sectional structure of the early warning unit shown in FIG. 3;

FIG. 7 is a schematic cross-sectional view of the mounting frame of FIG. 2;

FIG. 8 is an enlarged schematic view of the structure shown at A in FIG. 7;

FIG. 9 is a schematic view of the elastic fold protection cover shown in FIG. 1;

fig. 10 is a schematic view of an installation structure of a cable in a power cable fitting of a constraint cable provided by the invention;

FIG. 11 is a schematic view of the cable of FIG. 10 on a pull block member;

Fig. 12 is a schematic view of the angle change of the cable when the cable is pulled back by the pre-warning unit.

Reference numerals in the drawings: 1. a mounting frame; 11. a middle connecting column; 12. a threading plate; 12a, a wire through hole; 12b, a mounting cavity; 12c, a threaded hole; 2. a pull-resistant member; 21. a U-shaped plate; 22. inserting a plate; 23. an L-shaped wire bent plate; 231. a middle connecting plate; 24. a slide bar; 241. a pole cap; 25. a spring A; 26. a binding seat; 26a, an open slot; 261. a connecting rod; 262. a rubber damping sleeve; 2a, a cable trough; 3. an early warning part; 31. erecting a plate; 32. sodium azide block; 33. an elastic fold undershoot airbag; 331. an abutting plate; 34. an inner roof rack; 341. an audible and visual alarm; 342. a GPS locator; 35. a contact base; 351. a contact blade; 352. a power supply; 36. an elastic pleated airbag column; 3a, vent holes; 4. an abutting assembly; 41. a sliding seat; 42. a spring B; 43. steel balls; 5. an elastic fold protection cover; 51. a connection frame; 51a, mounting holes.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Specific implementations of the invention are described in detail below in connection with specific embodiments.

Referring to fig. 1 to 12, a power cable fitting of a constraint cable according to an embodiment of the present invention includes: a mounting frame 1, a pull-resistant component 2 and an early warning component 3.

In the embodiment of the present invention, referring to fig. 1,2,4 and 5, the installation frame 1 includes a center pillar 11, two ends of the center pillar 11 are fixedly provided with threading plates 12, the threading plates 12 are provided with a plurality of annular distributed through holes 12a, a plurality of groups of annular distributed drag components 2 are installed in the installation frame 1, and the drag components 2 reduce cable breakage or pull loss caused by external force drag;

The pull-resisting component 2 comprises a U-shaped plate 21, two symmetrically distributed and slidingly connected L-shaped wire bent plates 23 are arranged on the U-shaped plate 21, specifically, inserting plates 22 are fixedly arranged on two sides of the U-shaped plate 21, the two inserting plates 22 are respectively inserted into sliding grooves formed in vertical plate sections of the two L-shaped wire bent plates 23 and slidingly connected with the sliding grooves, and cable grooves 2a are formed in the outer ring wall of the U-shaped plate 21, the outer wall of the inserting plate 22 and the outer ring wall of the L-shaped wire bent plates 23;

The fixing frame between the two L-shaped wire curved plates 23 is provided with a middle connecting plate 231, the U-shaped plate 21 is fixedly provided with a sliding rod 24, the rod head of the sliding rod 24 penetrates through a through cavity formed in the middle connecting plate 231 and is fixedly provided with a rod cap 241, a spring A25 is arranged between the U-shaped plate 21 and the middle connecting plate 231, the spring A25 is sleeved on the sliding rod 24, one end of the spring A25 is fixedly connected with the inner bottom wall of the U-shaped plate 21, and the other end of the spring A25 is fixedly connected with the lower plate wall of the middle connecting plate 231.

It should be noted that: when a cable passes through the power cable fitting, the routing path is as follows: the wire through hole 12a on the left threading plate 12, the open slot 26a of the left binding seat 26, the wire slot 2a of the left L-shaped wire bent plate 23, the wire slot 2a of the right binding seat 26, the wire through hole 12a on the right threading plate 12 (as shown in fig. 10 and 11, the left side and the right side are used for better indicating the routing path and not indicating the actual direction), so that the power cable fitting can keep a plurality of wires at opposite interval positions to prevent wires from whipping each other or sub-span oscillation;

Also to be described is: the elastic force of the spring A25 of the U-shaped plate 21 enables the inserting plate 22 to slide downwards to the lowest point along the sliding groove formed by the L-shaped wire bent plate 23, and the cable wound on the left side and the right side of the U-shaped plate 21 and the vertical section of the L-shaped wire bent plate 23 can form a reserved line section of the cable;

When the cable is pulled, the bearing animal or greatly swings due to strong wind, after the cable below the U-shaped plate 21 is pulled, the cable slides outwards along the constraint seat 26 in the pulling direction, so that the cable pushes the U-shaped plate 21 to slide towards the L-shaped wire bent plate 23, the spring A25 compresses, meanwhile, the reserved line segment can slide towards the outer side of the threading plate 12 to buffer the cable at the tight position, the hidden danger that the cable is instantaneously pulled, the bearing animal or greatly swings due to strong wind to be instantaneously stretched is avoided, after the cable is withdrawn due to the external pulling force, the U-shaped plate 21 slides downwards along the L-shaped wire bent plate 23 under the resilience force of the compression spring A25, and then the reserved line segment of the external sliding part is pulled back to the lower side of the U-shaped plate 21, so that the cable can be conveniently pulled for the next pulling.

In the embodiment of the present invention, referring to fig. 2,3 and 5, two opposite ends of the L-shaped wire curved plate 23 are respectively provided with a binding seat 26, the binding seats 26 are fixedly connected with horizontal plate ends in the L-shaped wire curved plate 23 through a connecting rod 261, the binding seats 26 are provided with open slots 26a, rubber damping sleeves 262 are fixedly embedded in the open slots 26a, the two binding seats 26 in the pull-blocking component 2 are respectively fixedly connected with two threading plates 12 in the installation frame 1, and the open slots 26a formed in the binding seats 26 are coaxially arranged with opposite threading holes 12a in the threading plates 12.

It should be noted that: the rubber damping sleeve 262 arranged in the constraint seat 26 can well limit the cable passing through the opening groove 26a, so that the pull-blocking component 2 can be stably arranged on the cable, the hidden danger that the pull-blocking component 2 slides randomly on the cable is avoided, and meanwhile, the cable groove 2a at the horizontal plate end in the L-shaped wire bent plate 23 and the opening groove 26a on the constraint seat 26 can be limited up and down, so that the cable is more stable.

In the embodiment of the present invention, referring to fig. 1,3, 4 and 6, each group of the pull-blocking members 2 is provided with an early warning member 3 for early warning of cable breakage or pulling loss, the early warning member 3 includes a mounting plate 31, the mounting plate 31 is fixedly mounted at an opening between two L-shaped wire curved plates 23, a sodium azide block 32 and an elastic fold down-punching air bag 33 are fixedly mounted at the bottom of the mounting plate 31, an abutting disc 331 is fixedly mounted at the bottom of the elastic fold down-punching air bag 33, the abutting disc 331 is coaxially arranged with a sliding rod 24, an inner top frame 34 is fixedly mounted on the mounting plate 31, an audible and visual alarm 341 and a GPS positioner 342 are fixedly mounted on two side walls of the inner top frame 34, and a contact seat 35 for controlling the opening of the audible and visual alarm 341 and a GPS positioner 342 is mounted on an inner top wall of the inner top frame 34;

The erection plate 31 is provided with a vent hole 3a, an elastic fold airbag column 36 is fixedly embedded on the erection plate 31 at a hole position above the vent hole 3a, the sodium azide block 32 is positioned inside the elastic fold down-flushing airbag 33, the elastic fold down-flushing airbag 33 is communicated with the elastic fold airbag column 36 through the vent hole 3a, a contact blade 351 is fixedly arranged at the top of the elastic fold airbag column 36, the contact blade 351 and the contact seat 35 form a contact switch structure, and a power supply 352 for supplying power to the contact seat 35, the audible-visual annunciator 341 and the GPS positioner 342 is also arranged on the inner top frame 34;

In this embodiment: because a plurality of power cable fittings are required to be installed on the cables so that a plurality of cables keep relative interval positions, the audible and visual annunciators 341 and the GPS positioners 342 can be numbered (for example, a1, a2, a3 … … an; b1, b2, b3 … … bn; audible and visual annunciators a and the GPS positioners b), and each audible and visual annunciator 341 and each GPS positioner 342 correspond to one code on a control indoor terminal, so that management staff can know which section of cable has a problem in time;

It should be noted that: when the cable is pulled to enable the outside of the reserved section cable to slide to the limit, the rod cap 241 on the sliding rod 24 slides upwards to the highest point, so that the rod cap 241 can strike the sodium azide block 32 in the elastic fold undershoot air bag 33, and the violently struck sodium azide block 32 is rapidly decomposed to generate a large amount of nitrogen, and the chemical equation is nan3=nah+n2;

The generated nitrogen gas can quickly expand the folded elastic fold impact reduction airbag 33, the expanded elastic fold impact reduction airbag 33 can offset the impact force on the top of part of the sliding rod 24, so that the U-shaped plate 21 sliding upwards to the highest point can slide downwards for a small distance, the cable at the U-shaped plate 21 and the cable at the position where the cable is pulled can form a pair-pulling situation, as shown in fig. 12 (the included angle of the cable at the position where the cable is stressed and pulled before the U-shaped plate 21 slides back is beta, which is a solid line part, the included angle of the cable at the position where the cable is stressed and pulled after the U-shaped plate 21 slides back is alpha, which is a dotted line part), and beta is larger than alpha, thus reducing the vertical downward force of the cable at the position where the cable is stressed and pulled, and greatly protecting the cable at the position;

and the other part of generated nitrogen enters the elastic fold airbag column 36 through the vent hole 3a and enables the elastic fold airbag column 36 to expand rapidly, and the expanded elastic fold airbag column 36 pushes the contact blade 351 to be inserted on the contact seat 35, so that the audible and visual alarm 341 and the GPS positioner 342 are started, the audible and visual alarm 341 can remind personnel around the section of cable or animals around the section of cable to be dispersed, and the GPS positioner 342 can facilitate staff to know which section of cable has a problem in time, so that the staff can maintain the section of cable in time.

In the embodiment of the present invention, referring to fig. 7 and 8, a plurality of mounting cavities 12B are formed in the through hole 12a, wherein the mounting cavities 12B are annularly distributed and radially arranged, each of the mounting cavities 12B is internally provided with an abutting component 4, the abutting component 4 comprises a sliding seat 41, the sliding seat 41 is inserted into the mounting cavity 12B and is slidably connected with the mounting cavity 12B, a steel ball 43 in rolling connection is embedded at the outer extension end of the sliding seat 41, a spring B42 is fixedly mounted at the insertion end of the sliding seat 41, and the other end of the spring B42 is fixedly connected with the inner wall of the mounting cavity 12B.

It should be noted that: when the cable passes through the through hole 12a in the threading plate 12, the cable can be pressed with the steel balls 43 which extend out, so that the sliding seat 41 presses the spring B42 and slides into the mounting cavity 12B, and the abutting component 4 can press the cable on one hand, so that the cable can be kept relatively stable in the through hole 12a, the stability strength of the hardware is further enhanced by matching with the binding seat 26, on the other hand, when the cable is pulled and dithered, the generated vibration force is transferred to the steel balls 43 and the spring B42 is compressed, so that the dithering amplitude of the cable is reduced, and when the cable slides or slides outwards along the through hole 12a, the rolling steel balls 43 can improve the stability of the cable when sliding and reduce the abrasion of the cable in the through hole 12 a.

In the embodiment of the present invention, referring to fig. 1 and 9, an elastic fold protection cover 5 is installed on the installation frame 1, two ends of the elastic fold protection cover 5 are fixedly embedded with a connection frame 51, any one connection frame 51 is fixedly embedded on an inner plate wall of the threading plate 12, another connection frame 51 is provided with an installation hole 51a, and another threading plate 12 is provided with a threaded hole 12c corresponding to the installation hole 51 a.

It should be noted that: when the cable passes through the inside drag part 2 of installing frame 1, can pressfitting elasticity fold protection casing 5 for the inside exhibition of installing frame 1 is showing, makes things convenient for the staff to accomplish cable threading work, and after the threading finishes, tensile elasticity fold protection casing 5 makes the connection frame 51 laminating on the elasticity fold protection casing 5 to threading board 12, and the reuse screw is fastened it can, thereby elasticity fold protection casing 5 can protect each part in the installing frame 1.

Notably, are: the threading plate 12 in the installation frame 1 is not limited to the triangle shown in the figure, but can be square, regular pentagon, regular hexagon and the like, and the corresponding number of the pull-resisting parts 2 and the early warning parts 3 are additionally arranged according to the shape of the threading plate, so that the relative number of cables can be limited, and the gold tool can be hung by using a hanging frame.

The power cable fitting of the constraint cable provided by the invention has the following working principle:

When a cable passes through the power cable fitting, the routing path is as follows: the wire through hole 12a on the left threading plate 12, the opening groove 26a of the left binding seat 26, the wire groove 2a of the left L-shaped wire bent plate 23, the wire groove 2a of the right binding seat 26, the wire through hole 12a on the right threading plate 12, so that the power cable fitting can keep a plurality of wires at opposite intervals to prevent wires from whipping or sub-span oscillation, the U-shaped plate 21 slides down to the lowest point along the sliding groove formed by the L-shaped wire bent plate 23 under the action of the elasticity of the spring A25, the wire wound on the left side and the right side of the U-shaped plate 21 and the wire of the vertical section of the L-shaped wire bent plate 23 can form a reserved wire section of the wire, and when the wire passes through the pull-resisting component 2 inside the installation frame 1, the elastic fold protection cover 5 can be pressed to expose the inside of the installation frame 1, so that a worker can conveniently complete the cable threading work, after the threading is completed, the elastic fold protection cover 5 is stretched to enable the connecting frame 51 on the elastic fold protection cover 5 to be attached to the threading plate 12 and then fastened by the screws, so that the elastic fold protection cover 5 can protect all components in the installation frame 1, wherein the rubber damping sleeve 262 arranged in the constraint seat 26 can well limit a cable penetrating through the opening groove 26a, the tension member 2 can be stably arranged on the cable, the hidden trouble that the tension member 2 slides randomly on the cable is avoided, and meanwhile, the cable groove 2a at the end of the horizontal plate in the L-shaped wire bent plate 23 and the opening groove 26a on the constraint seat 26 can be limited up and down to enable the cable to be more stable;

When the cable passes through the through hole 12a in the threading plate 12, the cable can be pressed with the steel balls 43 which extend out, so that the sliding seat 41 presses the spring B42 and slides into the mounting cavity 12B, the abutting component 4 can press the cable on one hand, so that the cable can be kept relatively stable in the through hole 12a, the stability strength of the hardware is further enhanced by matching with the binding seat 26, on the other hand, when the cable is pulled and shakes, the generated vibration force is transferred to the steel balls 43 and the spring B42 is compressed, so that the shaking amplitude of the cable is reduced, and when the cable slides or slides outwards along the through hole 12a, the rolling steel balls 43 can improve the stability of the cable during sliding and reduce the abrasion of the cable in the through hole 12 a;

When the cable is pulled, the bearing animal or greatly swings due to strong wind, after the cable below the U-shaped plate 21 is pulled, the cable slides outwards along the constraint seat 26 in the pulling direction, so that the cable pushes the U-shaped plate 21 to slide towards the L-shaped wire curved plate 23, the spring A25 compresses, meanwhile, the reserved line segment can slide towards the outer side of the threading plate 12 to buffer the cable at the tight position, the hidden danger that the cable is instantaneously pulled, the bearing animal or greatly swings due to strong wind to be instantaneously stretched is avoided, after the cable is withdrawn due to the external pulling force, the U-shaped plate 21 slides downwards along the L-shaped wire curved plate 23 under the resilience force of the compression spring A25, and then the reserved line segment of the external sliding part is pulled back to the lower side of the U-shaped plate 21, so that the cable can conveniently cope with the next pulling and pulling;

When the cable is pulled to make the outside of the reserved section cable slide to the limit, the rod cap 241 on the sliding rod 24 slides to the highest point at this time, so that the rod cap 241 can strike the sodium azide block 32 in the elastic fold down-flushing air bag 33, and the violently struck sodium azide block 32 is rapidly decomposed to generate a large amount of nitrogen, the chemical equation is NaN3 = nah+n2, a part of generated nitrogen can rapidly make the folded elastic fold down-flushing air bag 33 rapidly expand, the expanded elastic fold down-flushing air bag 33 can counteract the impact force of the part of the sliding rod 24, the U-shaped plate 21 sliding to the highest point can slide a small distance, the cable at the U-shaped plate 21 can form a pair-pulling situation with the cable at the highest point, as shown in fig. 12 (the included angle of the cable at the position of the U-shaped plate 21 before sliding is beta, the included angle of the cable at the position of the solid line after the U-shaped plate 21 sliding is alpha, the broken line is alpha), the expanded elastic fold down-flushing air bag 33 can counteract the impact force of the part of the cable at the elastic fold down-flushing air bag 33, the impact force of the air bag can be reduced to the position of the air bag at the air bag 36 a position of the air bag, the air bag can be more than the air bag 35, the air bag can be opened by the other side of the air bag 35 in time, and the position of the air bag can be opened by the worker can be more than the air bag 35, and the peripheral of the worker can be conveniently, and the worker can be positioned by the position of the air bag 35 in the position of the air bag can be conveniently can be opened.

The circuits and control involved in the present invention are all of the prior art, and are not described in detail herein.

The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present invention.

Claims (10)

1. A power cable fitting for restraining a cable, comprising:

a mounting frame (1), and

The plurality of groups of pull-resistant components (2) are annularly distributed in the mounting frame (1), the cable is reduced to be broken or pulled out due to external force pulling through the pull-resistant components (2), and each group of pull-resistant components (2) is provided with an early warning component (3) for early warning the cable to be broken or pulled out;

The pull-resistant component (2) comprises a U-shaped plate (21), two symmetrically distributed and slidingly connected L-shaped wire curved plates (23) are arranged on the U-shaped plate (21), a middle connecting plate (231) is fixedly arranged between the two L-shaped wire curved plates (23), a sliding rod (24) is fixedly arranged on the U-shaped plate (21), a rod head of the sliding rod (24) penetrates through a through cavity formed in the middle connecting plate (231) and is fixedly provided with a rod cap (241), and a spring A (25) is arranged between the U-shaped plate (21) and the middle connecting plate (231);

The early warning part (3) comprises a erection plate (31), the erection plate (31) is fixedly erected at an opening between two L-shaped lead curved plates (23), a sodium azide block (32) and an elastic fold undershoot air bag (33) are fixedly embedded at the bottom of the erection plate (31), an inner top frame (34) is fixedly installed on the erection plate (31), an audible-visual annunciator (341) and a GPS (global positioning system) locator (342) are respectively fixedly installed on two side walls of the inner top frame (34), and a contact seat (35) for controlling the audible-visual annunciator (341) and the GPS locator (342) to be opened is installed on the inner top wall of the inner top frame (34).

2. The power cable fitting for restraining a cable according to claim 1, wherein the spring a (25) is sleeved on the sliding rod (24), one end of the spring a (25) is fixedly connected with the inner bottom wall of the U-shaped plate (21), and the other end of the spring a (25) is fixedly connected with the lower plate wall of the intermediate connecting plate (231).

3. The power cable fitting for restraining cables according to claim 2, wherein the two sides of the U-shaped plate (21) are fixedly provided with inserting plates (22), and the two inserting plates (22) are respectively inserted into sliding grooves formed in vertical plate sections of the two L-shaped wire curved plates (23) and are in sliding connection with the sliding grooves, and cable grooves (2 a) are formed in the outer ring wall of the U-shaped plate (21), the outer wall of the inserting plates (22) and the outer ring wall of the L-shaped wire curved plates (23).

4. A power cable fitting for restraining a cable according to claim 3, wherein two L-shaped wire curved plates (23) are provided with a restraint seat (26) at opposite ends, the restraint seat (26) is fixedly connected with a horizontal plate end in the L-shaped wire curved plates (23) through a connecting rod (261), an open slot (26 a) is formed in the restraint seat (26), and a rubber damping sleeve (262) is fixedly embedded in the open slot (26 a).

5. The power cable fitting for restraining cables according to claim 1, wherein the erection plate (31) is provided with a vent hole (3 a), an elastic fold airbag column (36) is fixedly embedded on the erection plate (31) at the position of a hole above the vent hole (3 a), a contact blade (351) is fixedly installed at the top of the elastic fold airbag column (36), the contact blade (351) and the contact seat (35) form a contact switch structure, and a power supply (352) for supplying power to the contact seat (35), the audible-visual annunciator (341) and the GPS positioner (342) is further installed on the inner top frame (34).

6. The power cable fitting of a constraint cable according to claim 5, wherein the sodium azide block (32) is located inside an elastic fold undershoot balloon (33), and the elastic fold undershoot balloon (33) communicates with an elastic fold balloon column (36) through a vent hole (3 a).

7. The power cable fitting for restraining a cable according to claim 6, characterized in that an abutment disc (331) is fixedly fitted to the bottom of the elastic-fold undershoot airbag (33), and the abutment disc (331) is coaxially disposed with the slide rod (24).

8. The power cable fitting for restraining cables according to claim 4, wherein the mounting frame (1) comprises a center connection column (11), threading plates (12) are fixedly mounted at two ends of the center connection column (11), a plurality of annular distributed through wire holes (12 a) are formed in the threading plates (12), a plurality of annular distributed radially arranged mounting cavities (12 b) are formed in the through wire holes (12 a), and an abutting assembly (4) is arranged in each mounting cavity (12 b);

the abutting component (4) comprises a sliding seat (41), the sliding seat (41) is inserted into the installation cavity (12B) and is in sliding connection with the installation cavity (12B), a steel ball (43) in rolling connection is embedded at the outer extending end of the sliding seat (41), a spring B (42) is fixedly arranged at the inserting and fixing end of the sliding seat (41), and the other end of the spring B (42) is fixedly connected with the inner wall of the installation cavity (12B).

9. The power cable fitting for restraining cables according to claim 8, wherein two restraint seats (26) in the pull-resistant component (2) are fixedly connected with two threading plates (12) in the mounting frame (1) respectively, and an open slot (26 a) formed in the restraint seat (26) is coaxially arranged with an opposite through-line hole (12 a) in the threading plate (12).

10. The power cable fitting for restraining cables according to claim 8, wherein an elastic fold protection cover (5) is installed on the installation frame (1), connecting frames (51) are fixedly embedded at two ends of the elastic fold protection cover (5), any connecting frame (51) is fixedly embedded on an inner plate wall of the threading plate (12), an installation hole (51 a) is formed in the other connecting frame (51), and threaded holes (12 c) corresponding to the installation holes (51 a) are formed in the other threading plate (12).