Mineral insulated fireproof cable

Abstract

The utility model belongs to the technical field of cables, and discloses a mineral insulated fireproof cable which comprises a plurality of cable cores, the outer walls of the cable cores are all sleeved with protective sleeves, the outer walls of the protective sleeves are jointly sleeved with a high-temperature-resistant layer, the high-temperature-resistant layer is filled with a filling layer, the outer wall of the high-temperature-resistant layer is sleeved with an insulating layer, and the outer wall of the insulating layer is sleeved with a fireproof layer. The outer wall of the insulating layer is sleeved with a protection layer, and the protection layer is sleeved with a protection device used for protecting the cable. The application has the effect of reducing the damage probability of the cable.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a mineral insulated fireproof cable. Background Art

[0002] Mineral insulated cable is a cable with a copper conductor core wrapped in a copper sheath. The outermost layer can be selected as an appropriate protective sheath as needed. There is a similar cable that uses metal instead of copper sheath to wrap the core wire and insulation material, which is called mineral insulated metal sheathed cable.

[0003] Regarding the above-mentioned related technologies, the inventors believe that the following defects exist: the existing fire-resistant cables are mostly protected by a protective layer set on the outermost layer during use. However, during use, if someone uses tools to dig a hole near the cable, the protective layer has a poor protection effect, which can easily cause the protective layer to be damaged, thereby damaging the cable, thereby increasing the probability of cable damage. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a mineral insulated fireproof cable.

[0005] The above technical objectives of the present utility model are achieved through the following technical solutions: a mineral insulated fire-resistant cable, comprising multiple cable cores, the outer walls of the multiple cable cores are all covered with protective sleeves, the outer walls of the multiple protective sleeves are jointly covered with a high-temperature resistant layer, the high-temperature resistant layer is filled with a filling layer, the outer wall of the high-temperature resistant layer is covered with an insulating layer, the outer wall of the insulating layer is covered with a protective layer, and the outer cover of the protective layer is provided with a protective device for protecting the cable.

[0006] By adopting this technical solution, when workers lay the cable, they need to pass the cable through the protective device, which then protects the cable. Afterwards, workers bury the cable in the ground. During this process, when the soil is dug up, the protective device can protect the cable inside, thereby reducing the probability of cable damage and extending the cable's service life.

[0007] Furthermore, the protective device includes a protective tube arranged outside the protective layer and a wave-proof sleeve installed on the inner wall of the protective tube. The protective tube is made of stainless steel, and the wave-proof sleeve is made of tinned copper wire. The protective tube is provided with a connecting component for connecting the protective tube.

[0008] By employing this technical solution, when the soil is excavated, the stainless steel protective tube protects the cables within. During this process, the stainless steel protective tube is highly resistant to damage, reducing the likelihood of damage to the cables within the tube and thus extending the cable's service life. Furthermore, the tinned copper wire wave-proof sleeve isolates external signals, reducing the likelihood of interference during cable transmission.

[0009] Furthermore, the connecting assembly includes a connecting pipe fixedly arranged at one end of the protective tube and a connecting sleeve rotatably arranged at the other end of the protective tube, and the connecting pipe is threadedly connected to the connecting sleeve.

[0010] With this technical solution, when workers thread the cable through the protective tubes, they use the connecting assembly to connect the two tubes. To do this, they simply move the two tubes toward each other. They then rotate the connecting sleeve to connect and secure the sleeve and tubes, simplifying the process.

[0011] Furthermore, an annular groove is provided on the outer wall of the protection tube, an annular block is rotatably provided in the annular groove, and the annular block and the connecting sleeve are fixed to each other.

[0012] By adopting the above technical solution, when the staff rotates the connecting sleeve, the annular block rotates synchronously with the connecting sleeve under the action of the connecting sleeve. During this process, the annular block limits the connecting sleeve, thereby reducing the probability of separation from the protective tube, thereby improving the stability of the device.

[0013] Furthermore, the thickness of the protective tube is 7 mm.

[0014] By adopting the above technical solution, the thickness of the protective tube is 7mm, which reduces the probability of the protective tube being buried in the drawing by the staff and the protective tube being flattened, thereby extending the service life of the protective tube.

[0015] Furthermore, the high temperature resistant layer is a high temperature resistant layer woven from mica tape.

[0016] By adopting the above technical solution, the high-temperature resistant layer made of mica tape improves the fireproof effect of the high-temperature resistant layer, thereby extending the service life of the cable.

[0017] Furthermore, the insulating layer is a mineral insulating layer.

[0018] By adopting the above technical solution, the mineral insulation layer effectively avoids the phenomenon of fire caused by high temperature inside the cable due to overload during the use of the cable, thereby improving the fire resistance and high temperature resistance of the cable.

[0019] In summary, the present invention has the following beneficial effects:

[0020] 1. In this application, when workers are laying cables, they need to pass the cables through the protective device, which then protects the cables. Then, workers bury the cables in the ground. During this process, when the soil is dug up, the protective device can protect the cables inside, thereby reducing the probability of cable damage and extending the service life of the cables.

[0021] 2. In this application, when the soil is dug, the stainless steel protective tube protects the cables inside. During this process, the stainless steel protective tube is strong and not easily damaged, thereby reducing the probability of damage to the cables inside the tube, thereby extending the service life of the cables. In addition, the tinned copper wire anti-wave sleeve can isolate external signals, thereby reducing the probability of interference with the cable during signal transmission.

[0022] 3. In this application, when workers thread the cable through the protective tube, they use a connecting assembly to connect the two protective tubes. To do this, they move the two protective tubes toward each other. Then, they rotate the connecting sleeve to connect and secure the sleeve and tubes, making it easier for them to connect the protective tubes. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0024] Figure 2 This is a schematic structural diagram of a cable in an embodiment of the present utility model;

[0025] Figure 3 It is a schematic cross-sectional structural diagram of the protection device and the connection assembly in the embodiment of the utility model.

[0026] In the figure: 1. Cable core; 11. Protective sleeve; 12. High-temperature resistant layer; 13. Filling layer; 14. Insulation layer; 15. Protective layer; 2. Protective device; 21. Protective tube; 22. Wave-proof sleeve; 3. Connecting assembly; 31. Connecting tube; 32. Connecting sleeve; 4. Annular groove; 41. Annular block. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; it is obvious that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0028] like Figure 1-3 As shown, the embodiment of the present application discloses a mineral insulated fire-resistant cable, comprising a cable core 1, a protective sheath 11, a high-temperature resistant layer 12, a filling layer 13, an insulating layer 14, a protective layer 15, a protective device 2, a connecting assembly 3, and an annular block 41. Multiple cable cores 1 are provided for transmitting signals. Multiple protective sheaths 11 are provided and are respectively sheathed on the outer walls of the multiple cable cores 1. The high-temperature resistant layer 12 is sheathed on the outer walls of the multiple protective sheaths 11. The filling layer 13 is filled in the high-temperature resistant layer 12. The insulating layer 14 is sheathed on the outer wall of the high-temperature resistant layer 12, and the protective layer 15 is sheathed on the outer wall of the insulating layer 14.

[0029] When workers are laying cables, they pass the cables through the protective device 2, which then protects the cables. They then bury the cables in the ground. During this process, when the soil is dug up, the protective device 2 protects the cables inside, thereby reducing the probability of cable damage and extending the service life of the cables.

[0030] Protective device 2 is mounted over protective layer 15 to protect the cable. It comprises a protective tube 21 and a surge-proof sleeve 22. Protective tube 21 is a circular tubular structure with a horizontal axis. It is mounted over protective layer 15 and is made of stainless steel. Surge-proof sleeve 22 is mounted on the inner wall of protective tube 21 and is made of tinned copper wire.

[0031] When the soil is dug, the stainless steel protective tube 21 protects the cables within. During this process, the stainless steel protective tube 21 is strong and resistant to damage, reducing the likelihood of damage to the cables within and thus extending their service life. Furthermore, the tinned copper wire anti-wave sleeve 22 isolates external signals, reducing the likelihood of interference during cable transmission.

[0032] Connecting assembly 3 is mounted on protective tube 21 and is used to connect to it. It comprises a connecting tube 31 and a connecting sleeve 32. Connecting tube 31 is a circular tubular structure, with its axis coinciding with the axis of protective tube 21. Connecting tube 31 is fixedly mounted on one end of protective tube 21. Connecting sleeve 32 is pivotally mounted on the other end of protective tube 21, with its axis coinciding with the axis of connecting tube 31. Connecting tube 31 and connecting sleeve 32 are threadedly connected.

[0033] When inserting the cable through the protective tubes 21, the worker uses the connecting assembly 3 to connect the two protective tubes 21. To do this, the worker moves the two protective tubes 21 toward each other. Then, the worker rotates the connecting sleeve 32, connecting and securing the connecting sleeve 32 and the connecting tube 31. This simplifies the process of connecting the protective tubes 21.

[0034] An annular groove 4 is formed on the outer wall of the protection tube 21 . The annular block 41 is an annular structure, and its axis coincides with the axis of the protection tube 21 . The annular block 41 is rotatably disposed in the annular groove 4 , and the annular block 41 and the connecting sleeve 32 are fixed to each other.

[0035] When the staff rotates the connecting sleeve 32, the annular block 41 rotates synchronously with the connecting sleeve 32 under the action of the connecting sleeve 32. During this process, the annular block 41 limits the connecting sleeve 32, thereby reducing the probability of separation from the protective tube 21, thereby improving the stability of the device.

[0036] In order to extend the service life of the protection tube 21, the thickness of the protection tube 21 is 7 mm. The thickness of the protection tube 21 is 7 mm, which reduces the probability of the protection tube 21 being buried in the drawing by the staff and being flattened, thereby extending the service life of the protection tube 21.

[0037] In order to extend the service life of the cable, the high temperature resistant layer 12 is a high temperature resistant layer 12 woven from mica tape. The high temperature resistant layer 12 woven from mica tape improves the fireproof effect of the high temperature resistant layer 12, thereby extending the service life of the cable.

[0038] In order to improve the fire resistance and high temperature resistance of the cable, the insulation layer 14 is a mineral insulation layer 14. The mineral insulation layer 14 effectively prevents the cable from catching fire due to high temperature inside the cable caused by overload during use, thereby improving the fire resistance and high temperature resistance of the cable.

[0039] The principle of use of a mineral insulated fire-resistant cable in this embodiment is as follows: when workers are laying the cable, they need to pass the cable through the protective device 2, so that the protective device 2 can protect the cable. Then, workers bury the cable in the ground. During this process, when the soil is dug up, the protective device 2 can protect the cable inside, thereby reducing the probability of cable damage and extending the service life of the cable.

[0040] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A mineral insulated fireproof cable comprising a plurality of cable cores (1), characterized in that: A protective sleeve (11) is sleeved on the outer walls of the plurality of cable cores (1), a high-temperature resistant layer (12) is sleeved on the outer walls of the plurality of protective sleeves (11), a filling layer (13) is filled in the high-temperature resistant layer (12), an insulating layer (14) is sleeved on the outer wall of the high-temperature resistant layer (12), a protective layer (15) is sleeved on the outer wall of the insulating layer (14), and a protective device (2) for protecting the cable is sleeved on the outer wall of the protective layer (15).

2. A mineral insulated fire-resistant cable according to claim 1, characterized in that: The protective device (2) comprises a protective tube (21) sleeved outside the protective layer (15) and a wave-proof sleeve (22) installed on the inner wall of the protective tube (21); the protective tube (21) is a protective tube (21) made of stainless steel; the wave-proof sleeve (22) is a wave-proof sleeve (22) woven from tinned copper wire; and a connecting component (3) for connecting the protective tube (21) is provided on the protective tube (21).

3. A mineral insulated fire-resistant cable according to claim 2, characterized in that: The connecting assembly (3) comprises a connecting pipe (31) fixedly arranged at one end of the protective pipe (21) and a connecting sleeve (32) rotatably arranged at the other end of the protective pipe (21); the connecting pipe (31) and the connecting sleeve (32) are threadedly connected.

4. A mineral insulated fire-resistant cable according to claim 3, characterized in that: An annular groove (4) is provided on the outer wall of the protection tube (21), an annular block (41) is rotatably arranged in the annular groove (4), and the annular block (41) and the connecting sleeve (32) are fixed to each other.

5. A mineral insulated fire-resistant cable according to claim 2, characterized in that: The thickness of the protection tube (21) is 7 mm.

6. The mineral insulated fire-resistant cable according to claim 1, characterized in that: The high temperature resistant layer (12) is a high temperature resistant layer (12) woven from mica tapes.

7. The mineral insulated fire-resistant cable according to claim 1, characterized in that: The insulating layer (14) is a mineral insulating layer (14).

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