A polyvinyl chloride sheathed cable

Abstract

The present invention relates to a polyvinyl chloride sheathed cable applied to the cable field, comprising a cable body and an overheated cable breaking mechanism arranged on the cable body, the overheated cable breaking mechanism comprising a cable sleeve support box, a cutting spring is fixedly installed on the top inner wall of the cable sleeve support box, and a connecting knife seat is fixedly connected to the bottom end of the cutting spring. Through the arrangement of the above-mentioned overheated cable breaking mechanism, when the temperature of the cable body is too high, the cable breaking knife in the overheated cable breaking mechanism will automatically cut off the cable body, thereby effectively avoiding further increase in the temperature of the cable body, and further significantly reducing the harm caused by the excessive temperature of the cable, and can largely avoid serious accidents caused by excessive cable temperature, greatly improving the safety of the cable, and the overheated cable breaking mechanism is a purely mechanical structure, without endurance anxiety, easy to maintain, low failure rate, its function is not easily unable to be triggered due to interference from external factors, and has extremely high reliability and stability.

Description

Technical Field

[0001] The invention relates to a cable, in particular to a polyvinyl chloride sheathed cable applied in the cable field. Background Art

[0002] With the continuous development of power technology and the widespread application of electrical equipment, cables, as important carriers of power and signal transmission, have increasingly higher performance and quality requirements.

[0003] As a common type of cable, PVC sheathed cable has been widely used in many fields due to its excellent electrical and mechanical properties and outstanding chemical corrosion resistance. However, at the same time, PVC sheathed cable also has some obvious shortcomings, especially in terms of high temperature resistance.

[0004] In actual application, the temperature of PVC sheathed cables may exceed the normal range due to cable aging, overload operation and other reasons. If corresponding measures are not taken in time to effectively deal with it, the cable temperature may rise further, causing serious safety accidents and posing a threat to equipment safety and even personnel safety. Therefore, we propose a PVC sheathed cable. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is: when the temperature of the polyvinyl chloride sheathed cable is too high, how to prevent the temperature of the cable from further increasing.

[0006] In order to solve the above problems, the present invention provides a polyvinyl chloride sheathed cable, comprising a cable body and an overheated cable breaking mechanism arranged on the cable body, the overheated cable breaking mechanism comprising a cable sleeve support box, a storage cutting spring is fixedly installed on the top inner wall of the cable sleeve support box, the bottom end of the storage cutting spring is fixedly connected to a connecting knife seat, the bottom end of the connecting knife seat is fixedly connected to a cable breaking cutter, a sealed heat-sensing cylinder is also fixedly installed in the cable sleeve support box, a top pressure spring is fixedly installed on the top inner wall of the sealed heat-sensing cylinder, and the bottom end of the top pressure spring is fixedly connected to a resistance spring which is slidably and sealedly connected to the sealed heat-sensing cylinder Rod piston block, a heat conducting rod is embedded in the outer wall of the bottom end of the sealed heat-sensing cylinder, a pull rod support tube is fixedly installed on the side wall of the sealed heat-sensing cylinder, a card storage rod is arranged on the inner side of the pull rod support tube, a pair of elastic pull ropes are fixedly connected between the card storage rod and the inner wall of the pull rod support tube, the card storage rod penetrates the outer wall of the sealed heat-sensing cylinder and is slidingly and sealingly connected thereto, one end of the card storage rod is abutted against the rod piston block, and the top of the other end of the card storage rod is abutted against the bottom of the connecting knife seat, the storage spring is in a contracted state, the elastic pull rope is in a stretched state, and the bottom end of the heat-conducting rod is abutted against the cable body.

[0007] In the above-mentioned PVC sheathed cable, when the temperature of the cable body is too high, the cable cutter in the overheated cable breaking mechanism will automatically cut off the cable body, thereby effectively preventing the temperature of the cable body from further increasing, and further significantly reducing the harm caused by the excessively high cable temperature, thereby greatly improving the safety of the cable.

[0008] As a further improvement of the present application, the cable body passes through the cable support box and is slidably connected thereto, thereby improving the flexibility and practicality of the overheating cable breaking mechanism. The cable breaking cutter is made of insulating material to avoid the risks of electric shock and leakage. A thermal conductive ring is movablely sleeved on the outer wall of the cable body, and the thermal conductive rod passes through the thermal conductive ring and is fixedly connected thereto. The thermal conductive ring can increase the contact area between the thermal conductive rod and the cable body, which is beneficial to heat transfer.

[0009] As a further improvement of the present application, a supporting sleeve matching the card storage rod is sleeved on the outer wall thereof, the card storage rod is movably connected to the supporting sleeve, and the supporting sleeve is fixedly connected to the sealed heat sensing tube, and the supporting sleeve can support the card storage rod and improve stability.

[0010] As another improvement of the present application, a vertical strike reminder piece is also provided on the cable support box, and the vertical strike reminder piece includes a connecting seat fixedly installed on the top end of the cable support box, the connecting seat is arranged in a U-shape, and a reminder plate is rotatably connected to the inner side of the connecting seat, and a linkage rope is fixedly connected to the reminder plate. The linkage rope passes through the top outer wall of the cable support box and is slidably connected thereto, and the end of the linkage rope away from the reminder plate is fixedly connected to the connecting knife seat. The reminder plate is in a horizontally placed state, which can serve as a reminder and can improve the work efficiency of subsequent inspections, maintenance and other work.

[0011] As another improved supplement to the present application, a drum hammer head is fixedly installed on the reminder board, and the vertical striking reminder component also includes a support frame fixedly installed on the top of the cable support box, the support frame is arranged in an inverted U shape, and a reminder gong and drum are arranged on the inner side of the support frame, and the top and left and right ends of the reminder gong and drum are fixedly connected with a drum rope, and the other end of the drum rope is fixedly connected to the support frame, which can further serve as a reminder and further improve the work efficiency of subsequent inspections, maintenance and other work.

[0012] As another improvement of the present application, a cable support box is further provided with an auxiliary restoration component, which includes a rope receiving drum fixedly installed on the side wall of the cable support box, both ends of the rope receiving drum are arranged to be open, and the end of the rope receiving drum away from the sealing heat-sensing drum is threadedly connected with a drum cover matching therewith, and a pull rod rope is stored in the rope receiving drum, the pull rod rope passes through the outer wall of the cable support box and the cable cutting knife and is slidably connected with them, one end of the pull rod rope is fixedly connected to the card storage rod, and the other end of the pull rod rope is fixedly connected to the drum cover.

[0013] As another improvement supplement of the present application, the auxiliary restoration component also includes a limit rod fixedly mounted on the inner wall of the cable support box, the limit rod is configured to be L-shaped, and the bottom end of the limit rod is against the top end of the connecting knife seat, and the connecting knife seat is made of iron plate, so that the overheating cable breaking mechanism can be reused, thereby improving the practicality of the overheating cable breaking mechanism.

[0014] To sum up, the present application sets an overheated cable breaking mechanism so that when the temperature of the cable body is too high, the cable cutting knife in the overheated cable breaking mechanism will automatically cut off the cable body, thereby effectively preventing the temperature of the cable body from further increasing, and further significantly reducing the harm caused by the excessive cable temperature, and can largely avoid serious accidents caused by excessive cable temperature, greatly improving the safety of the cable, and the overheated cable breaking mechanism is a purely mechanical structure, which is very convenient to use, has no endurance anxiety, is easy to maintain, and has a low failure rate. Its function is not easily unable to be triggered due to interference from external factors, and has extremely high reliability and stability; through the setting of the immediate striking reminder, the immediate striking reminder can play a dual reminder role, and this reminder role can be beneficial to the subsequent investigation, maintenance and other work, and effectively improve the work efficiency of the investigation, maintenance and other work; through the setting of the auxiliary recovery component, after the function of the overheated cable breaking mechanism is triggered, the overheated cable breaking mechanism can be restored through simple operation, so that the overheated cable breaking mechanism can be reused, thereby improving the practicality of the overheated cable breaking mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of a polyvinyl chloride sheathed cable in the first embodiment of the present application;

[0016] Figure 2 This is a schematic cross-sectional view of the cable support box in the first embodiment of the present application;

[0017] Figure 3 This is a schematic cross-sectional view of the sealed thermal cylinder in the first embodiment of the present application;

[0018] Figure 4 This is a schematic cross-sectional view of the tie rod support tube in the first embodiment of the present application;

[0019] Figure 5 This is a schematic diagram of the three-dimensional structure of a polyvinyl chloride sheathed cable in the second embodiment of the present application;

[0020] Figure 6 This is a side structural schematic diagram of the support frame in the second embodiment of the present application;

[0021] Figure 7 This is a schematic cross-sectional view of the cable support box in the second embodiment of the present application;

[0022] Figure 8 For this application Figure 7 A schematic diagram of the enlarged structure at A in the middle;

[0023] Fig. 9 This is a schematic diagram of the cross-sectional structure of the rope drum in the second embodiment of the present application.

[0024] Description of the numbers in the figure:

[0025] 001, cable body; 201, cable support box; 202, storage spring; 203, connecting knife seat; 204, cable cutting knife; 205, sealed heat-sensing cylinder; 206, top pressure spring; 207, push rod piston block; 208, heat-conducting rod; 209, card storage rod; 210, pull rod support tube; 211, elastic pull rope; 212, support sleeve; 213, heat-conducting ring; 301, connecting seat; 302, reminder plate; 303, linkage rope; 304, drum hammer; 305, support frame; 306, reminder gongs and drums; 307, hanging drum rope; 401, rope drum; 402, drum cover; 403, pull rod rope; 404, limit rod. DETAILED DESCRIPTION

[0026] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0027] The first implementation method:

[0028] Figure 1-4 A polyvinyl chloride sheathed cable is shown, comprising a cable body 001 and an overheated cable breaking mechanism arranged on the cable body 001. The cable body 001 is an ordinary polyvinyl chloride sheathed cable in the prior art. The overheated cable breaking mechanism comprises a cable support box 201. A cutting spring 202 is fixedly installed on the top inner wall of the cable support box 201. The bottom end of the cutting spring 202 is fixedly connected to a connecting knife seat 203. The bottom end of the connecting knife seat 203 is fixedly connected to a cable breaking cutter 204. A sealed heat-sensing cylinder 205 is also fixedly installed in the cable support box 201. A top pressure spring 206 is fixedly installed on the top inner wall of the sealed heat-sensing cylinder 205. The bottom end of the top pressure spring 206 is fixedly connected to a resisting spring 206 that is slidably and sealedly connected to the sealed heat-sensing cylinder 205. Rod piston block 207, a heat conducting rod 208 is embedded in the outer wall of the bottom end of the sealed heat sensing tube 205, a pull rod support tube 210 is fixedly installed on the side wall of the sealed heat sensing tube 205, a card storage rod 209 is arranged on the inner side of the pull rod support tube 210, a pair of elastic pull ropes 211 are fixedly connected between the card storage rod 209 and the inner wall of the pull rod support tube 210, the card storage rod 209 penetrates the outer wall of the sealed heat sensing tube 205 and is slidably and sealedly connected thereto, one end of the card storage rod 209 is against the rod piston block 207, and the top of the other end of the card storage rod 209 is against the bottom of the connecting knife seat 203, the storage spring 202 is in a contracted state, the elastic pull rope 211 is in a stretched state, and the bottom end of the heat conducting rod 208 is against the cable body 001.

[0029] The air under the push rod piston block 207 can establish a heat-conducting connection with the cable body 001 through the heat-conducting rod 208, so that when the temperature of the cable body 001 rises, the temperature of the air under the push rod piston block 207 will also rise accordingly. The increase in air temperature will cause expansion, which will increase the air pressure under the push rod piston block 207. Under the action of the air pressure, the push rod piston block 207 will have a tendency to move upward, and the top pressure spring 206 will limit the upward movement of the push rod piston block 207 to a certain extent, so that when the temperature of the cable body 001 is normal, the push rod piston block 207 will not easily The push rod 207 moves upward, but as the temperature rises, the air pressure below the push rod piston block 207 will become greater and greater. After the air pressure increases to a certain level, the push rod piston block 207 will gradually move upward and compress the top pressure spring 206. When the temperature of the cable body 001 is too high and exceeds its normal working temperature range, the push rod piston block 207 will move to the top of the card storage rod 209 and separate from the card storage rod 209 (that is, under the heat conduction effect of the heat conducting rod 208, the temperature of the cable body 001 rises, which will cause the air below the push rod piston block 207 to expand due to the heat. When the temperature of the cable body 001 is high enough to exceed its normal working temperature range, the push rod piston block 207 will move to the top of the card storage rod 209 and separate from the card storage rod 209. When the temperature range is reached, the expansion of the air under the push rod piston block 207 will cause the push rod piston block 207 to separate from the card storage rod 209). At this time, the elastic pull rope 211 will rebound, thereby pulling the card storage rod 209, causing the card storage rod 209 to move away from the connecting knife seat 203, causing the card storage rod 209 to separate from the connecting knife seat 203, thereby allowing the storage spring 202 to rebound. Under the action of the elastic force of the storage spring 202, the connecting knife seat 203 and the cable cutting knife 204 will move downward quickly, causing the cable cutting knife 204 to cut off the cable body 001. Therefore, the overheated cable cutting machine The setting of the structure makes it possible for the cable body 001 to be automatically cut off by the cable cutter 204 in the overheated cable breaking mechanism when the temperature of the cable body 001 is too high, thereby effectively preventing the temperature of the cable body 001 from further increasing, and further significantly reducing the harm caused by the excessively high cable temperature. It can largely prevent serious accidents caused by excessive cable temperature, greatly improving the safety of the cable. The overheated cable breaking mechanism is a purely mechanical structure, which is very convenient to use, has no endurance anxiety, is easy to maintain, has a low failure rate, and its function is not easily unable to be triggered due to interference from external factors, and has extremely high reliability and stability.

[0030] See also Figure 1-3The cable body 001 passes through the cable support box 201 and is slidably connected thereto, so that the overheated cable breaking mechanism can be slidably adjusted along the cable body 001, so that technical personnel in this field can set the overheated cable breaking mechanism at a suitable position according to the situation, and after the cable cutting knife 204 cuts off the cable body 001, the cable body 001 cut into two sections can be easily pulled out, which is conducive to the subsequent maintenance work and improves the flexibility and practicality of the overheated cable breaking mechanism. The cable cutting knife 204 is made of insulating material to avoid the risk of electric shock and leakage. A heat-conducting ring 213 is movably sleeved on the outer wall of the cable body 001, and the heat-conducting rod 208 passes through the heat-conducting ring 213 and is fixedly connected thereto. The heat-conducting ring 213 can increase the contact area between the heat-conducting rod 208 and the cable body 001, which is conducive to heat transfer.

[0031] See also Figure 4 A supporting sleeve 212 matching with the card storage rod 209 is sleeved on the outer wall thereof, the card storage rod 209 is movably connected with the supporting sleeve 212, and the supporting sleeve 212 is fixedly connected with the sealed heat sensing tube 205, and the supporting sleeve 212 can support the card storage rod 209 and improve stability.

[0032] The second implementation method:

[0033] Figure 5-9 A polyvinyl chloride sheathed cable is shown. Different from the first embodiment, a vertical striking reminder is also provided on the cable support box 201. The vertical striking reminder includes a connecting seat 301 fixedly installed on the top of the cable support box 201. The connecting seat 301 is arranged in a U shape. A reminder plate 302 is rotatably connected to the inner side of the connecting seat 301. A linkage rope 303 is fixedly connected to the reminder plate 302. The linkage rope 303 passes through the top outer wall of the cable support box 201 and is slidably connected thereto. The end of the linkage rope 303 away from the reminder plate 302 is fixedly connected to the connecting knife seat 203. The reminder plate 302 is in a horizontal position. When the spring 202 rebounds to make the cable cutting knife 204 cut off the cable body 001, the downward movement of the connecting knife seat 203 will pull the reminder plate 302 through the linkage rope 303 to make the reminder plate 302 stand up. After the cable body 001 is cut off, some chain reactions will be triggered, prompting relevant technical personnel to carry out investigation, maintenance and other work. When the relevant technical personnel investigate to the overheated cable breaking mechanism, they can see that the reminder plate 302 is stood up, and they will know that the overheated cable breaking mechanism cut off the cable body 001 due to the excessive temperature of the cable body 001, which can serve as a reminder and improve the work efficiency of subsequent investigation, maintenance and other work.

[0034] A drum hammer 304 is fixedly installed on the reminder plate 302, and the standing reminder piece also includes a support frame 305 fixedly installed on the top of the cable support box 201, and the support frame 305 is set to an inverted U shape, and a reminder gong and drum 306 is set on the inner side of the support frame 305, and the top and left and right ends of the reminder gong and drum 306 are fixedly connected with a drum rope 307, and the other end of the drum rope 307 is fixedly connected to the support frame 305. The linkage rope 303 pulls the reminder plate 302, so that when the reminder plate 302 stands up, the drum hammer 304 will violently hit the reminder gong and drum 306, causing the reminder gong and drum 306 to emit a strong sound, which can further play a reminder role, prompting relevant technical personnel to go to the overheated cable break mechanism in time for inspection, and further improve the work efficiency of subsequent investigation, maintenance and other work. Therefore, through the setting of the standing reminder piece, the standing reminder piece can play a dual reminder role, and this reminder role can be conducive to the development of subsequent investigation, maintenance and other work, and effectively improve the work efficiency of investigation, maintenance and other work.

[0035] See also Figure 7-9 The cable support box 201 is also provided with an auxiliary repair component, which includes a rope drum 401 fixedly installed on the side wall of the cable support box 201, both ends of the rope drum 401 are set to be open, one end of the rope drum 401 away from the sealed heat-sensing cylinder 205 is threadedly connected with a cylinder cover 402 matching therewith, and a pull rod rope 403 is stored in the rope drum 401, the pull rod rope 403 passes through the outer wall of the cable support box 201 and the cable cutting knife 204 and is slidably connected to them, one end of the pull rod rope 403 is fixedly connected to the card storage rod 209, and the other end of the pull rod rope 403 is fixedly connected to the cylinder cover 402, and the auxiliary repair component also includes a limit rod 404 fixedly installed on the inner wall of the cable support box 201, the limit rod 404 is set to be L-shaped, and the bottom end of the limit rod 404 is against the top of the connecting knife seat 203, and the connecting knife seat 203 is made of iron plate.

[0036] After the cable cutter 204 cuts the cable body 001, an electromagnet is taken and placed on the top of the cable support box 201, and the electromagnet is started, so that the connecting knife seat 203 drives the cable cutting knife 204 to move upward and reset under the action of magnetic attraction, and the storage spring 202 is compressed again, and then the cylinder cover 402 is unscrewed, and the card storage rod 209 is pulled through the cylinder cover 402 and the pull rod rope 403 to reset the card storage rod 209, so that the card storage rod 209 is re-stuck on the connecting knife seat 203 and the elastic pull rope 211 is stretched again, and then the top pressure spring 206 will rebound, causing the rod piston block 207 to move downward and reset and re-resist the card storage rod 209, and then the electromagnet can be removed and the cylinder cover 402 can be screwed on again. Therefore, through the setting of the auxiliary recovery component, after the function of the overheated cable breaking mechanism is triggered, the overheated cable breaking mechanism can be restored by simple operation, so that the overheated cable breaking mechanism can be reused, thereby improving the practicality of the overheated cable breaking mechanism.

[0037] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A polyvinyl chloride sheathed cable, comprising a cable body (001) and an overheating cable breaking mechanism arranged on the cable body (001), characterized in that: The overheated cable breaking mechanism comprises a cable support box (201), a cutting storage spring (202) is fixedly mounted on the inner wall at the top end of the cable support box (201), a connecting knife seat (203) is fixedly connected to the bottom end of the cutting storage spring (202), a cable breaking knife (204) is fixedly connected to the bottom end of the connecting knife seat (203), a sealed heat-sensing cylinder (205) is also fixedly mounted in the cable support box (201), a top pressure spring (206) is fixedly mounted on the inner wall at the top end of the sealed heat-sensing cylinder (205), and the top pressure spring (206) is fixedly mounted on the inner wall at the top end of the sealed heat-sensing cylinder (205). The bottom end of the compression spring (206) is fixedly connected to a rod-resisting piston block (207) that is slidably and sealably connected to the sealed heat-sensing tube (205); a heat-conducting rod (208) is embedded through the outer wall of the bottom end of the sealed heat-sensing tube (205); a pull rod support tube (210) is fixedly installed on the side wall of the sealed heat-sensing tube (205); a card storage rod (209) is arranged on the inner side of the pull rod support tube (210); a pair of elastic pull ropes (211) are fixedly connected between the card storage rod (209) and the inner wall of the pull rod support tube (210); The card storage rod (209) penetrates the outer wall of the sealed heat-sensing cylinder (205) and is slidably sealed therewith, one end of the card storage rod (209) abuts against the abutting piston block (207), and the top of the other end of the card storage rod (209) abuts against the bottom of the connecting knife seat (203), the storage spring (202) is in a contracted state, the elastic pull rope (211) is in a stretched state, and the bottom end of the heat-conducting rod (208) abuts against the cable body (001); The cable body (001) passes through the cable support box (201) and is slidably connected thereto; the cable cutter (204) is made of insulating material; a heat-conducting ring (213) is movably sleeved on the outer wall of the cable body (001); and the heat-conducting rod (208) passes through the heat-conducting ring (213) and is fixedly connected thereto.

2. A polyvinyl chloride sheathed cable according to claim 1, characterized in that: A supporting sleeve (212) matching the card storage rod (209) is sleeved on the outer wall thereof, the card storage rod (209) is movably connected to the supporting sleeve (212), and the supporting sleeve (212) is fixedly connected to the sealed heat sensing tube (205).

3. A polyvinyl chloride sheathed cable according to claim 1, characterized in that: The cable support box (201) is also provided with a vertical striking reminder, and the vertical striking reminder comprises a connecting seat (301) fixedly mounted on the top of the cable support box (201), the connecting seat (301) is arranged in a U-shape, and a reminder plate (302) is rotatably connected to the inner side of the connecting seat (301), and a linkage rope (303) is fixedly connected to the reminder plate (302), and the linkage rope (303) passes through the top outer wall of the cable support box (201) and is slidably connected thereto, and one end of the linkage rope (303) away from the reminder plate (302) is fixedly connected to the connecting knife seat (203), and the reminder plate (302) is in a horizontally placed state.

4. A polyvinyl chloride sheathed cable according to claim 3, characterized in that: A drum hammer (304) is fixedly mounted on the reminder plate (302), and the standing drum reminder also includes a support frame (305) fixedly mounted on the top of the cable support box (201), and the support frame (305) is arranged in an inverted U shape, and a reminder gong and drum (306) is arranged on the inner side of the support frame (305), and the top and left and right ends of the reminder gong and drum (306) are fixedly connected with a drum hanging rope (307), and the other end of the drum hanging rope (307) is fixedly connected to the support frame (305).

5. A polyvinyl chloride sheathed cable according to claim 1, characterized in that: The cable support box (201) is also provided with an auxiliary restoration component, which includes a rope collecting drum (401) fixedly mounted on the side wall of the cable support box (201), both ends of the rope collecting drum (401) are arranged to be open, one end of the rope collecting drum (401) away from the sealed heat-sensing drum (205) is threadedly connected with a drum cover (402) matching therewith, a pull rod rope (403) is stored in the rope collecting drum (401), the pull rod rope (403) passes through the outer wall of the cable support box (201) and the cable cutter (204) and is slidably connected thereto, one end of the pull rod rope (403) is fixedly connected to the card storage rod (209), and the other end of the pull rod rope (403) is fixedly connected to the drum cover (402).

6. A polyvinyl chloride sheathed cable according to claim 5, characterized in that: The auxiliary repair component also includes a limit rod (404) fixedly mounted on the inner wall of the cable support box (201), the limit rod (404) is arranged in an L shape, and the bottom end of the limit rod (404) is against the top end of the connecting knife seat (203), and the connecting knife seat (203) is made of iron plate.

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