A double flame retardant power cable

Abstract

The present invention provides a double flame-retardant power cable, and the sliding assembly also includes a first push rod, an oblique rod, a second push rod, an upper blade, a rotating shaft, a lower blade, a baffle and a pipe. The first push rod and the second push rod slide on both sides of the sliding frame, the oblique rod is located at one end of the first push rod close to the sleeve, the rotating shaft is hinged to the side of the clamping ring close to the second push rod, the upper blade and the lower blade swing at the upper and lower ends of the rotating shaft respectively, the pipe runs through the interior of the sleeve, and the baffle is deformed and bent to the interior of the pipe. Since the oblique rods are provided at both ends of the first push rod, one end of the oblique rod forms a support for the baffle. At this time, the dry powder in the clamping ring flows to the interior of the pipe. Since the inner cavity runs through one side of the pipe, the dry powder is distributed in the interior of the sleeve through the pipe. By utilizing the internal distribution of the dry powder in the sleeve, when the cable catches fire and burns to the outside of the sleeve, the dry powder in the sleeve falls downward, thereby forming a flame retardant effect on the outside of the cable.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and in particular to a double flame-retardant power cable. Background Art

[0002] Power cables are used to transmit and distribute electrical energy. They are commonly used in urban underground power grids, power station outgoing lines, internal power supply for industrial and mining enterprises, and underwater transmission lines across rivers and seas. Power cables are connected by terminal blocks and transmit electricity. Here are some technical inspirations for power cables:

[0003] At present, CN202010435858.6 in the prior art discloses a cross-linked polyethylene insulated polyolefin sheathed halogen-free low-smoke flame-retardant power cable. The invention discloses a power cable. The halogen-free low-smoke inner sheath layer is fixedly provided with a heat insulation layer, and the heat insulation layer is fixedly provided with a halogen-free low-smoke flame-retardant sheath layer. On the basis of ordinary power cables, a water cooling device and halogen-free low-smoke materials are provided to improve the heat dissipation effect and strength.

[0004] Through comparative documents and research on existing technologies, it was found that the cable's outer sheath is easily damaged after being impacted by external forces. Since the cable is energized, the cable is prone to fire due to leakage after surface damage, resulting in the cable being unable to form flame retardancy after a fire. At the same time, the comparative documents can only provide flame retardancy through the flame retardant layer, which can only have a temporary flame retardant effect. In addition, the comparative documents are provided with a water cooling device, and the cold water is conductive, which results in poor flame retardancy of this type of power cable.

[0005] The present invention can mainly solve the problem that the cable cannot form flame retardancy after catching fire. Summary of the Invention

[0006] In order to solve the above technical problems, the present invention provides a double flame-retardant power cable to solve the problems described in the above background technology.

[0007] The purpose and effect of the double flame-retardant power cable of the present invention are achieved by the following specific technical means: a double flame-retardant power cable includes a terminal, the end of the terminal is connected to a cable, the two ends of the cable close to the terminal are surrounded by clamps, and a sleeve is provided between the clamps.

[0008] Furthermore, the sleeve surrounds the interior of the cable, the connection terminals are located at both ends of the cable, and the cable is a power cable.

[0009] Furthermore, the interior of the clamping ring is hollow and filled with dry powder. The upper end and the interior of the clamping ring are provided with a sliding component that can form a flame retardant.

[0010] Furthermore, the interior of the sleeve is connected to the interior of the clamping ring, the sleeve is arranged in a circular ring shape, and the sleeve and the clamping ring are combined to cover the outside of the cable.

[0011] Furthermore, the sliding assembly includes an axis arm, a bent axis, a folding ring, a bracket and a sliding frame. The axis arm slides and extends to the upper end of the retaining ring, the bent axis rotates at the connection point of the axis arm, the folding ring folds and telescopes on the inner side of the bent axis, the bracket is inside the bent axis, and the sliding frame slides at the lower end of the axis arm.

[0012] Furthermore, the shaft arms are arranged at an inclination of 25-45 degrees, the shaft arms are located on both sides of the upper end of the cable, and each combination of two shaft arms is arranged in an inverted "V" shape, and the shaft arms are matched with the clamping ring.

[0013] Furthermore, the bending shafts are rotatably mounted on the shaft arms, and the bending shafts are arranged in a semicircular arc shape with an angle of 180°.

[0014] Furthermore, the folding ring is folded in a wave shape, the folding ring is located in the middle of the bending axis, and the maximum length of the folding ring is less than 5 cm.

[0015] Furthermore, the stent is arranged in a "V" shape, the stent passes through the interior of the folding ring, and the stent length is 1-2 cm.

[0016] Furthermore, the sliding frame is located inside the clamping ring, and the sliding frame is arranged in an "eight" shape. A track is provided inside the clamping ring, and the track is arranged horizontally. The sliding frame slides horizontally inside the track. The thickness of the sliding frame is 0.1-0.3 cm, and the sliding frame is made of metal, such as iron.

[0017] Furthermore, the sliding assembly also includes a first push rod, an oblique rod, a second push rod, an upper blade, a rotating shaft, a lower blade, a baffle and a pipe. The first push rod and the second push rod slide on both sides of the sliding frame. The oblique rod is located at the end of the first push rod close to the sleeve. The rotating shaft is hinged to the side of the clamping ring close to the second push rod. The upper blade and the lower blade swing at the upper and lower ends of the rotating shaft respectively. The pipe runs through the interior of the sleeve, and the baffle is embedded in the end of the pipe close to the first push rod.

[0018] Furthermore, the oblique rod is arranged at an angle of 45 degrees, and is distributed at both ends of the first push rod, and one end of the first push rod is spaced less than 1 cm from the baffle.

[0019] Furthermore, the second push rod is arranged to be inclined at 45 degrees, and the second push rod extends to one side of the upper blade. When the sliding frame slides, the second push rod slides synchronously.

[0020] Furthermore, the radius of the lower blade is 2-4 cm greater than the radius of the upper blade, and the upper blade and the lower blade swing horizontally inside the clamping ring through the rotating shaft.

[0021] Furthermore, the baffles are arranged in groups of two, and the baffles are arranged in a semicircular shape. The baffles extend to the inside of the clamping ring, and the baffles are slidably nested with the pipe. An inner cavity is provided on the side of the sleeve close to the pipe, and the baffles are made of deformable material, such as rubber.

[0022] Beneficial effects:

[0023] 1. When one end of the cable is hit or the cable is disconnected from the terminal, the cable end slides down quickly. Since the clamps are at both ends of the cable, the shaft arm of the clamp on one side of the cable moves downward quickly, causing this end of the bending shaft to twist the folding ring. Since the maximum length of the folding ring is less than 5 cm, the other end of the bending shaft slides downward quickly, so that when the shaft arm at one end of the bending shaft slides downward quickly, the shaft arm at the other end of the bending shaft can slide synchronously and quickly. When the shaft arm slides toward the inside of the clamp, it is squeezed against one end of the sliding frame. The sliding frame is arranged in an "eight" shape. At this time, the two ends of the sliding frame slide in opposite directions on the internal track of the clamp;

[0024] 2. When one side of the upper end of the cable is slightly impacted, the arm on one side of the upper end of the cable slides slightly downward synchronously. The end of the bending shaft close to the downward falling arm slides synchronously through the folding ring, and one side of the folding ring bends synchronously. Due to the small sliding arc of the bending shaft, the bending shaft cannot drive the arm on the other side to slide downward synchronously, so the arm on the other side of the upper end of the cable cannot slide downward synchronously, thereby preventing malfunction caused by slight collision with the cable;

[0025] 3. Since the two ends of the sliding frame slide in opposite directions, the first push rod and the second push rod on both sides of the sliding frame slide in opposite directions. The first push rod pushes and squeezes one side of the baffle, causing the baffle to deform and bend into the inside of the pipe. Since inclined rods are provided at both ends of the first push rod, one end of the inclined rod supports the baffle. At this time, the dry powder inside the clamping ring flows into the inside of the pipe. Since the inner cavity passes through one side of the pipe, the dry powder is distributed inside the casing through the pipe. With the dry powder distributed inside the casing, when the cable catches fire and burns to the outside of the casing, the dry powder inside the casing falls downward, thereby forming a flame retardant effect on the outside of the cable.

[0026] 4. When the second push rod slides, one side of the second push rod is squeezed to one side of the upper blade. At this time, the upper blade drives the lower blade to swing upward through the rotating shaft. Since the radius of the lower blade is 2-4 cm larger than the radius of the upper blade, the weight of the lower blade is greater than the weight of the upper blade, so that the lower blade swings upward briefly and then quickly swings downward. The swinging of the upper and lower blades can assist the dry powder inside the clamp ring to enter the interior of the pipeline, avoiding the situation where the dry powder cannot enter the interior of the pipeline due to accumulation of dry powder inside the clamp ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0028] Figure 2 Schematic diagram of the cross-sectional structure of the cable of the present invention.

[0029] Figure 3 It is a schematic diagram of the bent axis cross-section structure of the present invention.

[0030] Figure 4 For the present invention Figure 2 Enlarged structural diagram at point A in the middle.

[0031] Figure 5 It is a schematic diagram of the partial structure of the first push rod of the present invention.

[0032] Figure 6 This is a schematic diagram of the blade swing of the present invention.

[0033] Figure 7 It is a schematic cross-sectional view of the casing of the present invention.

[0034] Figure 1-7 , the corresponding relationship between component names and figure numbers is as follows:

[0035] 1-terminal, 101-cable, 2-clamping ring, 201-axis arm, 202-bend axis, 203-folding ring, 204-bracket, 3-sliding frame, 301-first push rod, 302-oblique rod, 303-second push rod, 4-upper blade, 401-rotating shaft, 402-lower blade, 5-sleeve, 501-baffle, 502-pipe. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] Example:

[0038] As attached Figure 1 To the attached Figure 7 As shown:

[0039] Example 1: A double flame-retardant power cable, comprising a terminal 1, the end of which is connected to a cable 101, with clamps 2 surrounding both ends of the cable 101 near the terminal 1, and a sleeve 5 provided between the clamps 2;

[0040] Wherein: the wiring terminal 1 and the cable 101, the sleeve 5 surrounds the inside of the cable 101, the wiring terminal 1 is at both ends of the cable 101, and the cable 101 is a power cable;

[0041] The clamp ring 2 is hollow and filled with dry powder. The upper end and the interior of the clamp ring 2 are provided with a sliding component that can form a flame retardant.

[0042] The sleeve 5 is connected to the interior of the clamp 2. The sleeve 5 is arranged in a circular ring shape. The sleeve 5 and the clamp 2 are combined to cover the outside of the cable 101.

[0043] The sleeve 5 and the clamping ring 2 are both made of meltable materials, such as plastic;

[0044] Example 2: Refer to the attached manual Figure 1-4 It can be seen that the difference between Example 2 and Example 1 is that the sliding assembly includes an axis arm 201, a bent axis 202, a folding ring 203, a bracket 204 and a sliding frame 3. The axis arm 201 slides and extends to the upper end of the clamping ring 2, the bent axis 202 rotates at the connection point of the axis arm 201, the folding ring 203 folds and retracts inside the bent axis 202, the bracket 204 is inside the bent axis 202, and the sliding frame 3 slides at the lower end of the axis arm 201;

[0045] Wherein: the shaft arm 201 is set at an angle of 25-45 degrees, the shaft arm 201 is located on both sides of the upper end of the cable 101, and each combination of two shaft arms 201 is set in an inverted "V" shape, and the shaft arm 201 is matched with the clamping ring 2;

[0046] The shaft arms 201 are located on both sides of the upper end of the cable 101, and can be used to protect the upper end of the cable 101;

[0047] The bending shaft 202 is respectively rotatably mounted on the shaft arm 201, and the bending shaft 202 is arranged in a semicircular arc shape with an angle of 180°;

[0048] When the cable 101 falls off on one side of the terminal block 1, when the shaft arm 201 on one side of the upper end of the cable 101 slides downward, the shaft arm 201 can drive the shaft arm 201 on the other side of the upper end of the cable 101 to slide downward through the bending shaft 202;

[0049] The folding ring 203 is folded in a wave shape and is located in the middle of the bending axis 202. The maximum length of the folding ring 203 is less than 5 cm.

[0050] The maximum length of the folding ring 203 is less than 5 cm, so as to avoid the situation where the two ends of the bending shaft 202 cannot form a linkage quickly due to the extended length of the folding ring 203;

[0051] With the folding ring 203 in the middle of the bending shaft 202, when the shaft arm 201 at one end of the bending shaft 202 slides slightly downward, the one end of the bending shaft 202 slides synchronously through the folding ring 203. At this time, the other end of the bending shaft 202 cannot drive the shaft arm 201 on the other side to slide synchronously downward due to the setting of the folding ring 203.

[0052] When the arm 201 at one end of the bent shaft 202 slides downward rapidly, the end of the bent shaft 202 causes the folding ring 203 to twist. Since the maximum length of the folding ring 203 is less than 5 cm, the other end of the bent shaft 202 slides downward rapidly, so that when the arm 201 at one end of the bent shaft 202 slides downward rapidly, the arm 201 at the other end of the bent shaft 202 can also slide rapidly synchronously.

[0053] The bracket 204 is arranged in a "V" shape, and the bracket 204 extends into the interior of the folding ring 203. The length of the bracket 204 is 1-2 cm;

[0054] The bracket 204 penetrates into the interior of the folding ring 203 and can limit the folding angle of the folding ring 203 to prevent the folding ring 203 from being excessively folded and twisted;

[0055] The sliding frame 3 is located inside the snap ring 2 and is arranged in an "eight" shape. A track is provided inside the snap ring 2. The track is arranged horizontally. The sliding frame 3 slides horizontally inside the track. The thickness of the sliding frame 3 is 0.1-0.3 cm. The sliding frame 3 is made of metal, such as iron.

[0056] The thickness of the sliding frame 3 is 0.1-0.3 cm. The sliding frame 3 is made of metal, such as iron, so that when the sliding frame 3 is squeezed by one end of the shaft arm 201, the two ends of the sliding frame 3 slide in opposite directions.

[0057] Among them: when one end of the cable 101 is hit or the cable 101 is disconnected from the terminal 1, one end of the cable 101 slides down quickly. Since the clamping ring 2 is at both ends of the cable 101, the shaft arm 201 of the clamping ring 2 on one side of the cable 101 moves downward quickly, and this end of the bent shaft 202 drives the folding ring 203 to twist. Since the maximum length of the folding ring 203 is less than 5 cm, the other end of the bent shaft 202 slides downward quickly, so that when the shaft arm 201 at one end of the bent shaft 202 slides downward quickly, the shaft arm 201 at the other end of the bent shaft 202 can slide synchronously and quickly. When the shaft arm 201 slides toward the inside of the clamping ring 2, it is squeezed to one end of the sliding frame 3. The sliding frame 3 is arranged in an "eight" shape. At this time, the two ends of the sliding frame 3 slide in opposite directions on the internal track of the clamping ring 2;

[0058] When one side of the upper end of the cable 101 is slightly bumped, the shaft arm 201 on one side of the upper end of the cable 101 slides slightly downward synchronously, and the end of the bent shaft 202 close to the downward falling shaft arm 201 slides synchronously through the folding ring 203, and one side of the folding ring 203 bends synchronously. Since the sliding arc of the bent shaft 202 is small, the bent shaft 202 cannot drive the shaft arm 201 on the other side to slide downward synchronously, so that the shaft arm 201 on the other side of the upper end of the cable 101 cannot slide downward synchronously, thereby preventing malfunction caused by slight collision with the cable 101;

[0059] Example 3: Refer to the attached manual Figure 1-7 It can be seen that the difference between Example 3 and Examples 1 and 2 is that the sliding assembly further includes a first push rod 301, an oblique rod 302, a second push rod 303, an upper blade 4, a rotating shaft 401, a lower blade 402, a baffle 501 and a pipe 502. The first push rod 301 and the second push rod 303 slide on both sides of the sliding frame 3. The oblique rod 302 is located at the end of the first push rod 301 close to the sleeve 5. The rotating shaft 401 is hinged to the side of the clamping ring 2 close to the second push rod 303. The upper blade 4 and the lower blade 402 swing at the upper and lower ends of the rotating shaft 401 respectively. The pipe 502 runs through the interior of the sleeve 5. The baffle 501 is embedded in the end of the pipe 502 close to the first push rod 301.

[0060] Among them: the first push rod 301 and the oblique rod 302, the oblique rod 302 is set at an angle of 45 degrees, the oblique rod 302 is distributed at both ends of the first push rod 301, and one end of the first push rod 301 is less than 1 cm away from the baffle 501;

[0061] One end of the first push rod 301 is spaced less than 1 cm from the baffle 501 , so that when the first push rod 301 slides toward one side of the pipe 502 , the first push rod 301 can be quickly squeezed to one side of the baffle 501 ;

[0062] The second push rod 303 is set at an angle of 45 degrees. The second push rod 303 extends to one side of the upper blade 4. When the sliding frame 3 slides, the second push rod 303 slides synchronously;

[0063] The upper blade 4 and the lower blade 402, the radius of the lower blade 402 is 2-4 cm larger than the radius of the upper blade 4, and the upper blade 4 and the lower blade 402 swing horizontally inside the clamping ring 2 through the rotating shaft 401;

[0064] The radius of the lower blade 402 is 2-4 cm greater than the radius of the upper blade 4, so the weight of the lower blade 402 is greater than the weight of the upper blade 4;

[0065] Baffles 501 and pipes 502 are arranged in groups of two. The baffles 501 are arranged in a semicircular ring shape and extend into the interior of the clamping ring 2. The baffles 501 and the pipes 502 are slidably nested. The side of the sleeve 5 close to the pipe 502 has an inner cavity. The baffles 501 are made of a deformable material, such as rubber.

[0066] The side of the sleeve 5 close to the pipe 502 is provided with an inner cavity, which passes through one side of the pipe 502. Figure 7 As shown;

[0067] The baffle 501 and the pipe 502 are slidably nested. When the first push rod 301 is pressed against one side of the baffle 501, the baffle 501 is deformed and bent into the inside of the pipe 502.

[0068] In particular, since the two ends of the sliding frame 3 slide in opposite directions, the first push rod 301 and the second push rod 302 on both sides of the sliding frame 3 slide in opposite directions, and the first push rod 301 pushes and squeezes to one side of the baffle 501, and the baffle 501 is deformed and bent to the inside of the pipe 502. Since the two ends of the first push rod 301 are provided with inclined rods 302, one end of the inclined rod 302 forms a support for the baffle 501. At this time, the dry powder inside the clamping ring 2 flows into the inside of the pipe 502. Since the inner cavity passes through one side of the pipe 502, the dry powder is distributed inside the casing 5 through the pipe 502. With the dry powder distributed inside the casing 5, when the cable 101 catches fire and burns to the outside of the casing 5, the dry powder inside the casing 5 falls downward, thereby forming a flame retardant effect on the outside of the cable 101.

[0069] When the second push rod 302 slides, one side of the second push rod 302 is pressed against one side of the upper blade 4. At this time, the upper blade 4 drives the lower blade 402 to swing upward through the rotating shaft 401. Figure 6 As shown;

[0070] Since the radius of the lower blade 402 is 2-4 cm larger than the radius of the upper blade 4, the weight of the lower blade 402 is greater than the weight of the upper blade 4, so that the lower blade 402 swings upward briefly and then quickly swings downward. The swinging of the upper blade 4 and the lower blade 402 can assist the dry powder inside the clamping ring 2 to enter the interior of the pipe 502, avoiding the situation where the dry powder cannot enter the interior of the pipe 502 due to the accumulation of dry powder inside the clamping ring 2.

Claims

1. A double flame retardant power cable, comprising a terminal (1), characterized in that: The end of the wiring terminal (1) is connected to a cable (101), and the two ends of the cable (101) close to the wiring terminal (1) are surrounded by clamping rings (2), and a sleeve (5) is provided between the clamping rings (2); The sleeve (5) surrounds the interior of the cable (101), the connection terminals (1) are located at both ends of the cable (101), and the cable (101) is a power cable; A clamping ring (2), wherein the interior of the clamping ring (2) is hollow, the interior of the clamping ring (2) is filled with dry powder, and a sliding component capable of forming a flame retardant is provided at the upper end and the interior of the clamping ring (2); A sleeve (5), the interior of the sleeve (5) is connected to the interior of the clamping ring (2), the sleeve (5) is arranged in a circular ring shape, and the sleeve (5) and the clamping ring (2) are combined to cover the outside of the cable (101); The sliding assembly comprises an axial arm (201), a bent shaft (202), a folding ring (203), a bracket (204) and a sliding frame (3); the axial arm (201) slides and extends to the upper end of the clamping ring (2); the bent shaft (202) rotates at the connection point of the axial arm (201); the folding ring (203) folds and retracts inside the bent shaft (202); the bracket (204) is inside the bent shaft (202); and the sliding frame (3) slides at the lower end of the axial arm (201); The sliding assembly further comprises a first push rod (301), an inclined rod (302), a second push rod (303), an upper blade (4), a rotating shaft (401), a lower blade (402), a baffle (501) and a pipe (502). The first push rod (301) and the second push rod (303) slide on both sides of the sliding frame (3). The inclined rod (302) is located at one end of the first push rod (301) close to the sleeve (5). The rotating shaft (401) is hinged to a side of the inside of the clamping ring (2) close to the second push rod (303). The upper blade (4) and the lower blade (402) swing at the upper and lower ends of the rotating shaft (401) respectively. The pipe (502) runs through the inside of the sleeve (5). The baffle (501) is embedded in one end of the pipe (502) close to the first push rod (301).

2. The double flame-retardant power cable according to claim 1, characterized in that: The shaft arms (201) are arranged at an inclination of 25-45 degrees, the shaft arms (201) are located on both sides of the upper end of the cable (101), and each combination of two shaft arms (201) is arranged in an inverted "V" shape. The shaft arms (201) are matched with the clamping ring (2).

3. The double flame-retardant power cable according to claim 1, characterized in that: The bending shafts (202) are respectively rotatably mounted on the shaft arms (201), and the bending shafts (202) are arranged in a semicircular arc shape, with a semicircular arc angle of 180°; The folding ring (203) is folded in a wave shape, the folding ring (203) is located in the middle of the bending axis (202), and the maximum length of the folding ring (203) is less than 5 cm.

4. The double flame-retardant power cable according to claim 1, characterized in that: The support (204) is arranged in a "V" shape, and the support (204) penetrates the interior of the folding ring (203). The length of the support (204) is 1-2 cm; The sliding frame (3) is located inside the clamping ring (2). The sliding frame (3) is arranged in an "eight" shape. A track is provided inside the clamping ring (2). The track is arranged horizontally. The sliding frame (3) slides horizontally inside the track. The thickness of the sliding frame (3) is 0.1-0.3 cm.

5. The double flame-retardant power cable according to claim 1, characterized in that: The inclined rod (302) is arranged at an angle of 45°. The inclined rod (302) is distributed at both ends of the first push rod (301). One end of the first push rod (301) is spaced less than 1 cm from the baffle (501).

6. The double flame-retardant power cable according to claim 1, characterized in that: The radius of the lower blade (402) is 2-4 cm greater than the radius of the upper blade (4), and the upper blade (4) and the lower blade (402) swing horizontally inside the clamping ring (2) via the rotating shaft (401).

7. The double flame-retardant power cable according to claim 1, characterized in that: The baffles (501) are arranged in groups of two each. The baffles (501) are arranged in a semicircular ring shape. The baffles (501) extend to the interior of the clamping ring (2). The baffles (501) and the pipe (502) are slidably nested. An inner cavity is provided on the side of the sleeve (5) close to the pipe (502).

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