Low-smoke flame-retardant control cable

Abstract

The invention relates to the technical field of cables, and provides a low-smoke flame-retardant control cable which comprises a conductor, an insulating layer, an armor layer and a sheath, the insulating layer wraps the conductor, the insulating layer is located in the armor layer, the sheath wraps the armor layer, the low-smoke flame-retardant control cable further comprises a flame-retardant layer and a cooling mechanism, the flame-retardant layer wraps the armor layer, and the cooling mechanism is located in the armor layer. The flame-retardant layer is used for flame retardance and comprises an inner flame-retardant layer, an outer flame-retardant layer and a supporting plate, the armor layer is wrapped with the inner flame-retardant layer, the outer flame-retardant layer is located outside the inner flame-retardant layer, a flame retardant is contained between the inner flame-retardant layer and the outer flame-retardant layer, and the cooling mechanism is arranged outside the sheath and used for cooling the sheath. The cooling mechanism comprises a moving seat, a moving assembly and an air cooling assembly. The moving assembly is used for driving the moving seat to move along the sheath. By means of the technical scheme, the problems that in the prior art, flame retardance is conducted only after combustion, the cable is difficult to cool from the source, and cable combustion is reduced are solved.

Description

Technical Field

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

[0002] Control cables are PVC insulated and PVC sheathed control cables suitable for industrial and mining enterprises, energy and transportation departments, and for control and protection of lines with an AC rated voltage of less than 450 / 750 volts. Low-smoke halogen-free flame-retardant cables are difficult to ignite and have the ability to prevent or spread fire. They are generally composed of conductors, insulation layers, sheath layers, and possible shielding layers. The conductors are usually made of metal materials such as copper or aluminum to ensure good conductivity. The insulation layer and sheath layer are the key parts to achieve low-smoke flame-retardant properties. They are made of special flame-retardant materials. The flame-retardant principle is mainly to add flame retardants and other substances to the insulation and sheath materials of the cable. When the cable encounters a flame, the flame retardant will undergo a series of chemical reactions, such as endothermic decomposition, covering isolation, and inhibiting free radicals, thereby preventing the spread and spread of the flame and making the cable flame-retardant. The low-smoke characteristic is achieved by selecting appropriate materials and formulas to reduce the generation and release of smoke during combustion.

[0003] The current low-smoke flame-retardant control cable mainly relies on the sheath of flame-retardant materials and flame retardants to achieve flame retardancy, that is, to control the flame after the cable burns. There is a lack of cooling facilities for the cable, and it mainly relies on natural heat dissipation to cool the cable. The high-temperature treatment method of the cable is relatively single, and it is difficult to curb the burning of the cable from the source. The burning of the cable will still affect the normal work. Therefore, we propose a low-smoke flame-retardant control cable that can cool the cable and reduce the high-temperature burning of the cable. Summary of the invention

[0004] The present invention provides a low-smoke flame-retardant control cable, which solves the problem in the prior art that flame retardancy is only performed after combustion, and it is difficult to cool the cable from the source and reduce the burning of the cable.

[0005] The technical solution of the present invention is as follows: A low-smoke flame-retardant control cable, comprising a conductor, an insulating layer, an armor layer and a sheath, wherein the insulating layer is wrapped around the outside of the conductor, the insulating layer is located inside the armor layer, the sheath is wrapped around the outside of the armor layer, and further comprising: A flame retardant layer, the flame retardant layer is wrapped around the outside of the armor layer, the flame retardant layer is used for flame retardancy, and the flame retardant layer includes: An inner flame retardant layer and an outer flame retardant layer, wherein the inner flame retardant layer is wrapped around the outside of the armor layer, the outer flame retardant layer is located outside the inner flame retardant layer, a flame retardant is placed between the inner flame retardant layer and the outer flame retardant layer, and the sheath is wrapped around the outside of the outer flame retardant layer; A support plate, the support plate being fixedly connected between the inner flame retardant layer and the outer flame retardant layer; A cooling mechanism, which is arranged outside the sheath and is used to cool the sheath, and the cooling mechanism comprises: Mobile seat; A moving assembly, the moving assembly is used to drive the moving seat to move along the sheath, and the moving assembly includes: A rotating frame, the rotating frame is rotatably connected to the moving seat, and a compression spring is connected between the rotating frame and the moving seat; A driving wheel, the driving wheel is rotatably disposed on the rotating frame, and the driving wheel is in contact with the outside of the sheath; An air cooling component is arranged on the movable seat and is used to cool the jacket. The air cooling component comprises: An air cooling chamber, the air cooling chamber being fixedly connected to the movable base; An air-cooling shaft, the air-cooling shaft is rotatably connected to the air-cooling bin, and the air-cooling shaft is drivingly connected to the driving wheel; The fan blades are fixedly connected to the outside of the air-cooling shaft.

[0006] In order to realize the rotation of the driving wheel, a driving assembly is also included, and the driving assembly is used to drive the driving wheel to rotate. The driving assembly includes: A driving gear, the driving gear being rotatably disposed on the rotating frame via a rotating shaft; The driven gear is rotatably connected to the rotating frame through the driving shaft. The driven gear is fixedly sleeved on the outside of the driving shaft, and the driven gear is meshed with the driving gear.

[0007] In order to realize the transmission between the air-cooling shaft and the driving wheel, the air-cooling shaft is connected to the driving shaft through a transmission assembly, and the transmission assembly includes: A driven rod, the driven rod is rotatably connected to the air cooling bin, and the end of the driven rod is fixedly connected to a driving bevel gear; A driven bevel gear, the driven bevel gear is fixedly connected to the end of the air-cooling shaft, and the driven bevel gear is meshed with the driving bevel gear; A transmission rod is rotatably connected to the moving seat, the transmission rod is transmission-connected to the driven rod through a sprocket chain 1, and the transmission rod is transmission-connected to the rotating shaft through a sprocket chain 2.

[0008] In order to ensure the stable transmission of the transmission rod and the driving shaft, a tensioning member is also included, and the tensioning member is used to tension the sprocket chain 2, and the tensioning member includes: A tensioning frame, the tensioning frame is connected to the moving seat through a tensioning spring and a telescopic rod; A tensioning wheel is rotatably connected to the tensioning frame, and the tensioning wheel is in contact with the surface of the sprocket chain 2.

[0009] In order to reduce external interference to sprocket chain 1 and sprocket chain 2, protective covers are provided on the outside of sprocket chain 1 and sprocket chain 2, the driven rod, the transmission rod and the rotating shaft are rotatably connected to the protective covers, and a tensioning opening for the tensioning wheel to pass through is opened on the protective cover outside the sprocket chain 2.

[0010] In order to reduce the resistance of the moving seat to movement, a plurality of balls are rotatably connected inside the moving seat, and the balls are in contact with the outside of the sleeve.

[0011] The working principle and beneficial effects of the present invention are: 1. In the present invention, the flame retardant of the cable is achieved by the flame retardant in the flame retardant layer. When the cable encounters flame, the flame retardant will undergo a series of chemical reactions, such as endothermic decomposition, covering isolation, and inhibition of free radicals, thereby preventing the propagation and spread of the flame.

[0012] 2. In the present invention, the driving wheel is pressed against the surface of the sheath by a compression spring, the driven gear and the driving wheel are driven to rotate by the driving gear, the moving seat is driven to move, the driven rod and the air-cooling shaft are driven to rotate by the transmission assembly, thereby driving the fan blades to rotate, blowing air toward the sheath, and comprehensively cooling the cable.

[0013] 3. Therefore, compared with the low-smoke flame-retardant control cable in the prior art, in addition to making the cable flame-retardant by adding flame retardants, the present invention also drives the cooling mechanism to move along the cable through the driving wheel, and at the same time, the sheath is cooled by air through the rotation of the fan blades, thereby cooling the entire cable, reducing the high-temperature combustion phenomenon of the control cable, and having higher safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the conductor, insulation layer, armor layer and sheath of the present invention; Figure 3 It is a schematic diagram of the planar structure of the conductor, insulating layer, armor layer and sheath of the present invention; Figure 4 It is a structural schematic diagram of the cooling mechanism of the present invention from a first viewing angle; Figure 5 It is a structural schematic diagram of the cooling mechanism of the present invention from a second viewing angle; Figure 6 It is a structural schematic diagram of the mobile component and the air cooling component of the present invention from a first perspective; Figure 7 It is a structural schematic diagram of the mobile component and the air cooling component of the present invention from a second viewing angle; Figure 8 For the present invention Figure 1 A schematic diagram of the local enlarged structure at point A in the middle; Fig. 9 For the present invention Figure 4 Schematic diagram of the local enlarged structure at point B in the middle.

[0016] In the figure: 1. Conductor; 2. Insulation layer; 3. Armor layer; 4. Sheath; 5. Protective cover; 6. Ball; 101, inner flame retardant layer; 102, outer flame retardant layer; 103, support plate; 201, mobile seat; 301, rotating frame; 302, driving wheel; 303, compression spring; 304, supporting frame; 401, air cooling chamber; 402, air cooling shaft; 403, fan blade; 501, driving gear; 502, driven gear; 503, rotating shaft; 504, motor; 505, driving shaft; 601, driven rod; 602, driven bevel gear; 603, transmission rod; 604, driving bevel gear; 605, sprocket chain 1; 606, sprocket chain 2; 701. Tensioning frame; 702. Tensioning wheel; 703. Tensioning spring. DETAILED DESCRIPTION

[0017] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] like Figures 1 to 9As shown, this embodiment proposes a low-smoke flame-retardant control cable, including a conductor 1, an insulating layer 2, an armor layer 3 and a sheath 4, the insulating layer 2 is wrapped around the outside of the conductor 1, the insulating layer 2 is located inside the armor layer 3, the sheath 4 is wrapped around the outside of the armor layer 3, the insulating layer 2 and the sheath 4 are both made of flame-retardant materials, have flame-retardant properties, reduce the conduction of flame generation, and also include a flame-retardant layer and a cooling mechanism. Compared with the low-smoke flame-retardant control cable in the prior art, in addition to flame-retarding the cable by adding flame retardants, the present invention also drives the cooling mechanism to move along the cable through the driving wheel 302, and at the same time, the sheath 4 is air-cooled by the rotation of the fan blades 403, thereby cooling the entire cable, reducing the high-temperature combustion phenomenon of the control cable, and having higher safety.

[0019] The flame retardant layer is wrapped around the outside of the armor layer 3, and the flame retardant layer is used for flame retardancy. The flame retardant layer includes an inner flame retardant layer 101, an outer flame retardant layer 102 and a support plate 103. The inner flame retardant layer 101 is wrapped around the outside of the armor layer 3, and the outer flame retardant layer 102 is located outside the inner flame retardant layer 101. A flame retardant is placed between the inner flame retardant layer 101 and the outer flame retardant layer 102. The sheath 4 is wrapped around the outside of the outer flame retardant layer 102, and the support plate 103 is fixedly connected between the inner flame retardant layer 101 and the outer flame retardant layer 102. A through hole is opened on the support plate 103, so that the flame retardant can flow freely inside the flame retardant layer while supporting the cable, thereby providing flame retardant protection for the cable.

[0020] A cooling mechanism is arranged on the outside of the jacket 4 for cooling the jacket 4. The cooling mechanism comprises a moving seat 201, a moving assembly and an air cooling assembly. The moving assembly is used to drive the moving seat 201 to move along the jacket 4. The moving assembly comprises a rotating frame 301 and a driving wheel 302. The rotating frame 301 is rotatably connected to the moving seat 201. A compression spring 303 is connected between the rotating frame 301 and the moving seat 201. A supporting frame 304 is fixedly connected to the moving seat 201. The compression spring 303 is connected between the supporting frame 304 and the rotating frame 301. The driving wheel 302 is rotatably arranged on the rotating frame 301. The driving wheel 302 contacts the outside of the jacket 4. The air cooling assembly is arranged on the moving seat 201 for cooling the jacket 4. The air cooling assembly comprises Air cooling bin 401, air cooling shaft 402 and fan blades 403, the air cooling bin 401 is fixedly connected to the movable seat 201, the air cooling shaft 402 is rotatably connected to the air cooling bin 401, the air cooling shaft 402 is transmission-connected to the driving wheel 302, the fan blades 403 are fixedly connected to the outside of the air cooling shaft 402, and the rotating frame 301 is driven by the compression spring 303 to press the driving wheel 302 against the surface of the sheath 4, and there is a certain sliding damping between the driving wheel 302 and the sheath 4. The rotation of the driving wheel 302 can push the movable seat 201 to move along the outside of the control cable, and during the rotation of the driving wheel 302, the air cooling shaft 402 and the fan blades 403 can be driven to rotate to form cold wind, so as to cool the control cable and reduce the heat generation and combustion of the control cable.

[0021] In order to realize the rotation of the driving wheel, a driving component is also included, which is used to drive the driving wheel to rotate. The driving component includes a driving gear 501 and a driven gear 502. The driving gear 501 is rotatably set on the rotating frame 301 through a rotating shaft 503. A motor 504 is installed on the rotating frame 301. The rotating shaft 503 is fixedly connected to the output end of the motor 504. The driving wheel 302 is rotatably connected to the rotating frame 301 through a driving shaft 505. The driven gear 502 is fixedly sleeved on the outside of the driving shaft 505. The driven gear 502 and the driving gear 501 are meshed. The driving gear 501 can be driven to rotate by the motor 504, thereby driving the driven gear 502, the driving shaft 505 and the driving wheel 302 to rotate, so that the moving seat 201 moves along the outside of the control cable.

[0022] In order to realize the transmission between the air-cooling shaft 402 and the driving wheel 302, the air-cooling shaft 402 is connected to the driving shaft 505 through a transmission assembly, and the transmission assembly includes a driven rod 601, a driven bevel gear 602 and a transmission rod 603. The driven rod 601 is rotatably connected to the air-cooling bin 401, and the end of the driven rod 601 is fixedly connected to the driving bevel gear 604. The driven bevel gear 602 is fixedly connected to the end of the air-cooling shaft 402, and the driven bevel gear 602 and the driving bevel gear 604 are meshed. The transmission rod 603 is rotatably connected to the moving seat 201, and the transmission rod 60 The transmission rod 603 is connected to the rotating shaft 503 through the sprocket chain 1 605 and the driven rod 601, and the transmission rod 603 is connected to the rotating shaft 503 through the sprocket chain 2 606. When the motor 504 drives the rotating shaft 503 and the driving gear 501 to rotate, the transmission rod 603 is driven to rotate under the transmission action of the sprocket chain 2 606, and the driven rod 601 is driven to rotate under the transmission action of the sprocket chain 1 605. The driven rod 601 drives the driving bevel gear 604 to rotate, and drives the driven bevel gear 602 and the air cooling shaft 402 to rotate, thereby driving the fan blades 403 to rotate to form cold air.

[0023] It should be noted that there are multiple groups of driving components, the number of air-cooling components is equal to or less than the number of driving components, and the air-cooling components are driven by the driving components.

[0024] In order to ensure stable transmission of the transmission rod 603 and the driving shaft 505, a tensioning member is also included, which is used to tension the sprocket chain 606. The tensioning member includes a tensioning frame 701 and a tensioning wheel 702. The tensioning frame 701 is connected to the support frame 304 through a tensioning spring 703 and a telescopic rod. The tensioning wheel 702 is rotatably connected to the tensioning frame 701. The tensioning wheel 702 contacts the surface of the sprocket chain 606. Under the action of the tensioning spring 703, the tensioning frame 701 drives the tensioning wheel 702 to press against the surface of the sprocket chain 606 to tension the chain, thereby ensuring the transmission connection between the rotating shaft 503 and the driven rod 601. At the same time, the pressure of the tensioning wheel 702 on the sprocket chain 606 is directed toward the control cable, further assisting in pressing the driving wheel 302 against the surface of the control cable, so that the driving wheel 302 drives the moving seat 201 to move along the control cable.

[0025] In order to reduce external interference to sprocket chain 1 605 and sprocket chain 2 606, a protective cover 5 is provided on the outside of sprocket chain 1 605 and sprocket chain 2 606, and the driven rod 601, the transmission rod 603 and the rotating shaft 503 are all rotatably connected to the protective cover 5. A tensioning opening for the tensioning wheel 702 to pass through is opened on the protective cover 5 outside the sprocket chain 2 606. The sprocket chain 1 605 and the sprocket chain 2 606 are protected by the protective cover 5 to avoid damage to people or other foreign objects during the rotational motion, and at the same time, reduce the obstruction of foreign objects to the rotational motion of the sprocket chain 1 605 and the sprocket chain 2 606, thereby ensuring the normal rotation of the fan blades 403 and the driving wheel 302.

[0026] In order to reduce the resistance to the movement of the moving seat 201, the moving seat 201 is internally connected to a plurality of balls 6 for rotation. The balls 6 are in external contact with the sheath 4, and the balls 6 are in external contact with the control cable. The balls 6 are used to create a certain gap between the moving seat 201 and the control cable. At the same time, the rotation of the balls 6 reduces the resistance to the movement of the moving seat 201, thereby reducing the work done by the motor 504.

[0027] The working principle or use process of the low-smoke flame-retardant control cable is: The movable seat 201 is sleeved on the outside of the sheath 4, and the driving wheel 302 is pressed against the surface of the sheath 4 under the action of the compression spring 303. The motor 504 drives the rotating shaft 503 and the driving gear 501 to rotate, thereby driving the driven gear 502, the driving shaft 505 and the driving wheel 302 to rotate, so that the movable seat 201 moves along the control cable. At the same time, the rotating shaft 503 drives the transmission rod 603 to rotate, the transmission rod 603 drives the driven rod 601 to rotate, and the driven rod 601 drives the air-cooling shaft 402 and the fan blades 403 to rotate, so as to cool the outside of the control cable with air. At the same time, the armor layer 3 and the flame-retardant layer provide flame-retardant protection for the control cable. When the cable burns, the flame retardant escapes from the inside of the flame-retardant layer to provide fire retardancy.

[0028] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A low-smoke flame-retardant control cable, comprising a conductor (1), an insulating layer (2), an armor layer (3) and a sheath (4), wherein the insulating layer (2) is wrapped around the outside of the conductor (1), the insulating layer (2) is located inside the armor layer (3), and the sheath (4) is wrapped around the outside of the armor layer (3), characterized in that: It also includes a flame retardant layer and a temperature reduction mechanism; The flame retardant layer is wrapped around the outside of the armor layer (3), and the flame retardant layer is used for flame retardancy. The flame retardant layer comprises: An inner flame retardant layer (101) and an outer flame retardant layer (102), wherein the inner flame retardant layer (101) is wrapped around the outside of the armor layer (3), the outer flame retardant layer (102) is located outside the inner flame retardant layer (101), a flame retardant is placed between the inner flame retardant layer (101) and the outer flame retardant layer (102), and the sheath (4) is wrapped around the outside of the outer flame retardant layer (102); A support plate (103), the support plate (103) being fixedly connected between the inner flame retardant layer (101) and the outer flame retardant layer (102); The cooling mechanism is arranged outside the sheath (4) and is used to cool the sheath (4). The cooling mechanism comprises: Mobile seat (201); A moving assembly, the moving assembly being used to drive the moving seat (201) to move along the sheath (4); An air cooling component is arranged on the movable seat (201) and is used to cool the jacket (4).

2. A low-smoke flame-retardant control cable according to claim 1, characterized in that: The mobile assembly comprises: A rotating frame (301), the rotating frame (301) being rotatably connected to the movable seat (201), and a compression spring (303) being connected between the rotating frame (301) and the movable seat (201); A driving wheel (302), the driving wheel (302) being rotatably disposed on the rotating frame (301), the driving wheel (302) being in contact with the outside of the protective sleeve (4).

3. A low-smoke flame-retardant control cable according to claim 2, characterized in that: The air cooling component comprises: An air cooling bin (401), the air cooling bin (401) being fixedly connected to the movable seat (201); An air cooling shaft (402), the air cooling shaft (402) being rotatably connected to the air cooling bin (401), and the air cooling shaft (402) being transmission-connected to the driving wheel (302); The fan blades (403) are fixedly connected to the outside of the air-cooling shaft (402).

4. A low-smoke flame-retardant control cable according to claim 3, characterized in that: It also includes a driving assembly, the driving assembly is used to drive the driving wheel (302) to rotate, and the driving assembly includes: A driving gear (501), the driving gear (501) being rotatably disposed on the rotating frame (301) via a rotating shaft (503); A driven gear (502), the driving wheel (302) is rotatably connected to the rotating frame (301) via a driving shaft (505), the driven gear (502) is fixedly sleeved on the outside of the driving shaft (505), and the driven gear (502) and the driving gear (501) are meshed.

5. A low-smoke flame-retardant control cable according to claim 4, characterized in that: The air-cooling shaft (402) is transmission-connected to the driving shaft (505) via a transmission assembly, wherein the transmission assembly comprises: A driven rod (601), the driven rod (601) being rotatably connected to the air cooling bin (401), and the end of the driven rod (601) being fixedly connected to a driving bevel gear (604); A driven bevel gear (602), the driven bevel gear (602) being fixedly connected to the end of the air-cooling shaft (402), the driven bevel gear (602) being meshed with the driving bevel gear (604); A transmission rod (603), the transmission rod (603) is rotatably connected to the movable seat (201), the transmission rod (603) is transmission-connected to the driven rod (601) via a sprocket chain 1 (605), and the transmission rod (603) is transmission-connected to the rotating shaft (503) via a sprocket chain 2 (606).

6. A low-smoke flame-retardant control cable according to claim 5, characterized in that: Also included is a tensioning member, the tensioning member is used to tension the sprocket chain 2 (606), the tensioning member includes: A tensioning frame (701), the tensioning frame (701) being connected to the movable seat (201) via a tensioning spring (703) and a telescopic rod; A tensioning wheel (702), the tensioning wheel (702) is rotatably connected to the tensioning frame (701), and the tensioning wheel (702) is in surface contact with the sprocket chain 2 (606).

7. A low-smoke flame-retardant control cable according to claim 6, characterized in that: The sprocket chain 1 (605) and the sprocket chain 2 (606) are both provided with a protective cover (5) on the outside; the driven rod (601), the transmission rod (603) and the rotating shaft (503) are all rotatably connected to the protective cover (5); and the protective cover (5) on the outside of the sprocket chain 2 (606) is provided with a tensioning opening for the tensioning wheel (702) to pass through.

8. The low-smoke flame-retardant control cable according to claim 7, characterized in that: A plurality of balls (6) are rotatably connected inside the movable seat (201), and the balls (6) are in contact with the outside of the sleeve (4).

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