Polyethylene insulated industrial control cable with multi-cavity isolation structure

Abstract

The application relates to the technical field of cables, in particular to a polyethylene insulated industrial control cable with a multi-cavity isolation structure, which solves the problem that the existing industrial control cable is easily extruded and bent due to the influence of the wire arrangement during application, the risk of cable damage and spontaneous combustion is increased, the use safety performance is reduced, and safe production is not facilitated. The polyethylene insulated industrial control cable with the multi-cavity isolation structure comprises an outer protective component, the inner side of the outer protective component is provided with an inner protective component, the inner protective component comprises a filling layer, a plurality of electric core units are arranged in the filling layer, a flame-retardant cavity is arranged between the electric core units, and a radial isolation component is arranged on the inner side of the flame-retardant cavity. The axial direction of the industrial control cable is supported at multiple points, the efficient rebound effect of the industrial control cable during bending is ensured, the industrial control cable is filled with flame retardant internally and active flame-retardant effect is achieved, and the compression cavity can effectively satisfy the pressure deformation of the industrial control cable.

Description

Technical Field

[0001] This invention relates to the field of cable technology, specifically to a polyethylene insulated industrial control cable with a multi-cavity isolation structure. Background Technology

[0002] Industrial control cables, or industrial control cables for short, are cables specifically designed for transmitting control signals, monitoring signals, and low-voltage, low-current commands in industrial automation control systems. Their core function is not to transmit high-power electrical energy, but to ensure accurate, stable, and reliable signal transmission between the control system and the executing equipment. Control cables are PVC insulated and PVC sheathed control cables suitable for use in industrial and mining enterprises, energy and transportation departments, and for control and protection circuits with AC rated voltages below 450 / 750 volts.

[0003] Existing industrial control cables are susceptible to compression and bending due to the influence of the cabling, increasing the risk of cable damage and spontaneous combustion, thereby reducing safety performance and hindering safe production. Therefore, they do not meet the current requirements. To address this, we propose a polyethylene insulated industrial control cable with a multi-cavity isolation structure. Summary of the Invention

[0004] The purpose of this invention is to provide a polyethylene insulated industrial control cable with a multi-cavity isolation structure, in order to solve the problem mentioned in the background art that existing industrial control cables are easily squeezed and bent during application due to the influence of the cabling, which increases the risk of cable damage and spontaneous combustion, thereby reducing the safety performance and hindering safe production.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a polyethylene insulated industrial control cable with a multi-cavity isolation structure, comprising an outer protective assembly, an inner protective assembly installed inside the outer protective assembly, the inner protective assembly comprising a filling layer, multiple battery cell units installed inside the filling layer, flame-retardant cavities provided between the multiple battery cell units, a radial isolation assembly installed inside the flame-retardant cavity, the radial isolation assembly comprising a central support unit, multiple radial mounting units and multiple elastic flame-retardant units, multiple radial mounting units installed outside the central support unit, the radial mounting units comprising a double-headed tightening sleeve, multiple tightening relief grooves provided at both ends of the double-headed tightening sleeve, multiple mounting plates fixedly installed in the middle of the double-headed tightening sleeve, a positioning ring installed at one end of each of the multiple mounting plates, and multiple mounting spokes installed on the outer side of the double-headed tightening sleeve;

[0006] Each of the mounting spokes has multiple elastic flame-retardant units installed on its inner side. Each elastic flame-retardant unit includes a soft cardboard shell, a sealing cap installed at one end of the soft cardboard shell, a central isolation frame installed in the middle of the inner side of the soft cardboard shell, a positioning piece installed at the end of the central isolation frame away from the sealing cap, a connecting ball head fixedly provided at the end of the sealing cap and the positioning piece, and flame-retardant filler bags installed on both sides of the central isolation frame.

[0007] Preferably, the central support unit includes a central support wire, a first spiral layer is installed on the outer side of the central support wire, and a second wrapping layer is provided on the outer surface of the central support wire, the first spiral layer and the second spiral layer.

[0008] Preferably, the outer protective component includes a first insulating layer, the outer surface of which is coated with a wear-resistant coating, a covering layer is fixedly installed on the inner side of the first insulating layer, a plurality of cut-resistant nylon filaments are fixedly installed inside the covering layer, and a shielding layer is fixedly installed on the inner side of the covering layer.

[0009] Preferably, the battery cell unit includes a second insulating layer, a first wrapping layer is installed on the inner side of the second insulating layer, a polyethylene layer is installed on the inner side of the first wrapping layer, and a plurality of battery cell wires are fixedly installed inside the polyethylene layer. The second insulating layer and the polyethylene layer are fixedly connected through the first wrapping layer, and the plurality of battery cell wires are arranged in parallel.

[0010] Preferably, the cut-resistant nylon filaments are arranged circumferentially relative to the covering layer, and the covering layer and the filling layer are fixedly connected by a shielding layer.

[0011] Preferably, the central support unit is inserted into the center of the filling layer, and the plurality of radial mounting units are arranged linearly along the axis of the central support unit, with the spacing between each pair of adjacent radial mounting units being 3:1 to the diameter of the first insulating layer.

[0012] Preferably, the plurality of mounting plates and mounting spokes are arranged circumferentially relative to the double-headed tightening sleeve. The end of each mounting spoke away from the mounting plate is inserted between two adjacent battery cells. The plurality of battery cells and mounting spokes are arranged alternately in a circumferential pattern. One end of each mounting plate and mounting spoke is provided with a slot. The mounting spoke is inserted into the inner side of the mounting plate. The positioning ring is inserted into the inner side of the slot. The mounting plate and mounting spoke are locked together by the positioning ring.

[0013] Preferably, the soft cardboard shell is fixedly connected to the mounting spokes, and the multiple elastic flame-retardant units on the inner side of each mounting spoke are arranged linearly. The sealing cover and the positioning piece are symmetrically arranged relative to the central isolation frame, and both ends of the central isolation frame are snap-fitted to the sealing cover and the positioning piece.

[0014] Preferably, the flame-retardant filler bag is filled with a liquid flame-retardant medium, and a compression chamber is provided between the central isolation frame and the two flame-retardant filler bags.

[0015] Preferably, the central support wire, the first spiral layer, and the second spiral layer are all covered by a second wrapping layer. The first spiral layer is formed by spirally winding multiple inner spiral wires, and the second spiral layer is formed by spirally winding multiple outer spiral wires.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. In this invention, multiple battery cell units and multiple mounting spokes in the radial mounting units are arranged alternately in a circular pattern, so that the number of mounting spokes and battery cell units on the cross-section of the radial isolation component in the industrial control cable is consistent. Then, multiple elastic flame-retardant units on the mounting spokes can effectively separate adjacent battery cell units. At the same time, multiple mounting sleeves are arranged in a circular pattern relative to the double-headed tightening sleeve, so that the mounting sleeves lock the mounting spokes through the positioning rings, which is convenient to adapt to different numbers of battery cell units. The central support unit and multiple linearly arranged radial mounting units can provide multi-point axial support for the industrial control cable, which can meet the requirement of maintaining a high-efficiency rebound effect during the bending process of the industrial control cable.

[0018] 2. In this invention, the central isolation frame, positioning plate, and sealing cover are all installed by connecting ball joints, which facilitates the positioning and installation of two adjacent flame-retardant filler bags. At the same time, the flame-retardant filler bags are filled with liquid flame-retardant medium. When the industrial control cable is ignited, the flame-retardant filler bag will break and the liquid flame-retardant medium will flow out, thereby filling the inside of the industrial control cable and achieving a flame-retardant effect. In addition, the compression cavity between the central isolation frame and the flame-retardant filler bag can effectively meet the pressure deformation of the industrial control cable when it is squeezed. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention;

[0021] Figure 3 This is a cross-sectional structural diagram of the inner protective component of the present invention;

[0022] Figure 4 This is a schematic diagram of the radial isolation component of the present invention;

[0023] Figure 5 For the present invention Figure 4 Enlarged structural diagram of region A in the middle;

[0024] Figure 6 This is a partial structural schematic diagram of the radial mounting unit of the present invention;

[0025] Figure 7 This is a cross-sectional structural diagram of the elastic flame-retardant unit of the present invention;

[0026] Figure 8 This is a cross-sectional structural diagram of the central support unit of the present invention;

[0027] Figure 9 This is an exploded structural diagram of the central support unit of the present invention.

[0028] In the diagram: 1. Outer protective assembly; 101. Wear-resistant coating; 102. First insulation layer; 103. Covering layer; 104. Cut-resistant nylon filament; 105. Shielding layer; 2. Inner protective assembly; 201. Filling layer; 202. Battery cell unit; 203. Flame-retardant cavity; 204. Second insulation layer; 205. First wrapping layer; 206. Polyethylene layer; 207. Battery cell filament; 3. Radial isolation assembly; 301. Central support unit; 3011. Central support filament; 30 12. Inner winding wire; 3013. Outer winding wire; 3014. Second wrapping layer; 302. Radial mounting unit; 3021. Double-headed tightening sleeve; 3022. Mounting spokes; 3023. Tightening relief groove; 3024. Positioning ring; 3025. Mounting sleeve; 303. Elastic flame-retardant unit; 3031. Soft cardboard shell; 3032. Sealing cap; 3033. Positioning piece; 3034. Connecting ball head; 3035. Central isolation frame; 3036. Flame-retardant filler bag. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] Please see Figure 1 and Figure 2 An embodiment of the present invention provides a polyethylene insulated industrial control cable with a multi-cavity isolation structure, comprising an outer protective component 1, an inner protective component 2 installed inside the outer protective component 1, the outer protective component 1 comprising a first insulating layer 102, the outer surface of the first insulating layer 102 being coated with a wear-resistant coating 101, a sheathing layer 103 being fixedly installed inside the first insulating layer 102, a plurality of cut-resistant nylon filaments 104 being fixedly installed inside the sheathing layer 103, the plurality of cut-resistant nylon filaments 104 being arranged circumferentially relative to the sheathing layer 103, and a shielding layer 105 being fixedly installed inside the sheathing layer 103, thereby facilitating multi-layer protection of the inner protective component 2 through the outer protective component 1.

[0031] Please see Figures 1 to 3The inner protective component 2 includes a filling layer 201, a covering layer 103 and a filling layer 201 fixedly connected by a shielding layer 105. Multiple battery cell units 202 are installed inside the filling layer 201, and flame-retardant cavities 203 are provided between the multiple battery cell units 202. Each battery cell unit 202 includes a second insulating layer 204, a first wrapping layer 205 is installed inside the second insulating layer 204, a polyethylene layer 206 is installed inside the first wrapping layer 205, and multiple battery cell wires 207 are fixedly installed inside the polyethylene layer 206. The second insulating layer 204 and the polyethylene layer 206 are fixedly connected by the first wrapping layer 205. The multiple battery cell wires 207 are arranged in parallel. The second insulating layer 204, the first wrapping layer 205 and the polyethylene layer 206 can further protect the battery cell wires 207.

[0032] Please see Figures 4 to 9 A radial isolation component 3 is installed inside the flame-retardant cavity 203. The radial isolation component 3 consists of a central support unit 301, multiple radial mounting units 302, and multiple elastic flame-retardant units 303. The central support unit 301 includes a central support wire 3011. A first spiral layer is installed on the outside of the central support wire 3011. The outer surfaces of the central support wire 3011, the first spiral layer, and the second spiral layer are all provided with a second wrapping layer 3014. The central support wire 3011, the first spiral layer, and the second spiral layer are all covered by the second wrapping layer 3014. The first spiral layer is formed by multiple inner winding wires 3012 spirally wound, and the second spiral layer is formed by multiple outer winding wires 3013 spirally wound. The central support unit 301 and multiple linearly arranged radial mounting units 302 can provide multi-point axial support for the industrial control cable, ensuring that the industrial control cable maintains a high-efficiency rebound effect during bending.

[0033] Please see Figure 5 and Figure 6Multiple radial mounting units 302 are installed on the outer side of the central support unit 301. The central support unit 301 is inserted into the center of the filling layer 201. The multiple radial mounting units 302 are arranged linearly along the axis of the central support unit 301. The spacing between any two adjacent radial mounting units 302 is 3:1 with the diameter of the first insulating layer 102. Each radial mounting unit 302 includes a double-headed tightening sleeve 3021. Both ends of the double-headed tightening sleeve 3021 are provided with multiple tightening relief grooves 3023. Multiple mounting sleeve plates 3025 are fixedly installed in the middle of the double-headed tightening sleeve 3021. A positioning ring 3024 is installed at one end of multiple mounting sleeves 3025, and multiple mounting spokes 3022 are installed on the outer side of the double-headed tightening sleeve 3021. The multiple mounting sleeves 3025 and mounting spokes 3022 are arranged in a circle relative to the double-headed tightening sleeve 3021. The end of each mounting spoke 3022 away from the mounting sleeve 3025 is inserted between two adjacent battery cell units 202. The multiple battery cell units 202 and mounting spokes 3022 are arranged in a circle alternately. The multiple elastic flame-retardant units 303 on the mounting spokes 3022 can effectively separate adjacent battery cell units 202.

[0034] Both the mounting plate 3025 and the mounting spoke 3022 have slots at one end. The mounting spoke 3022 is inserted into the inside of the mounting plate 3025, and the positioning ring 3024 is inserted into the inside of the slot. The mounting plate 3025 and the mounting spoke 3022 are locked together by the positioning ring 3024. The mounting plate 3025 locks the mounting spoke 3022 together by the positioning ring 3024, which is convenient to adapt to different numbers of battery cells 202.

[0035] Please see Figures 5 to 7Each mounting spoke 3022 has multiple elastic flame-retardant units 303 installed on its inner side. These units are arranged linearly. Each elastic flame-retardant unit 303 includes a flexible cardboard shell 3031, which is fixedly connected to the mounting spoke 3022. A sealing cap 3032 is installed at one end of the flexible cardboard shell 3031. A central isolator 3035 is installed in the middle of the inner side of the flexible cardboard shell 3031. A positioning piece 3033 is installed at the end of the central isolator 3035 away from the sealing cap 3032. The sealing cap 3032 and the positioning piece 3033 are symmetrically arranged relative to the central isolator 3035. Both ends of the device are snapped into the sealing cap 3032 and the positioning piece 3033. A connecting ball head 3034 is fixedly provided at the end of the sealing cap 3032 and the positioning piece 3033. Flame-retardant filler bags 3036 are installed on both sides of the central isolation frame 3035. The flame-retardant filler bags 3036 are filled with liquid flame-retardant medium. A compression chamber is provided between the central isolation frame 3035 and the two flame-retardant filler bags 3036. When the industrial control cable is ignited, the flame-retardant filler bag 3036 is damaged and the liquid flame-retardant medium flows out, which can fill the inside of the industrial control cable and achieve the flame-retardant effect. The compression chamber can effectively meet the pressure deformation of the industrial control cable.

[0036] In summary, when applying this method to industrial control cables, the radial isolation component 3 is installed inside the flame-retardant cavity 203, allowing the radial isolation component 3 to serve as the central support for the inner protective component 2. Simultaneously, multiple mounting spokes 3022 in each radial mounting unit 302 are inserted between multiple battery cells 202. The multiple battery cells 202 and the multiple mounting spokes 3022 in the radial mounting unit 302 are arranged alternately in a circular pattern, ensuring that the number of mounting spokes 3022 and battery cells 202 on the cross-section of the radial isolation component 3 in the industrial control cable is consistent. Furthermore, the multiple elastic flame-retardant units 303 on the mounting spokes 3022 can effectively separate adjacent battery cells 202.

[0037] Meanwhile, multiple mounting sleeves 3025 are arranged circumferentially relative to the double-headed tightening sleeve 3021, and mounting spokes 3022 are inserted into the inner side of the mounting sleeves 3025, so that the mounting sleeves 3025 lock the mounting spokes 3022 through the positioning rings 3024, which is convenient to adapt to different numbers of battery cells 202. At the same time, the spacing dimension of the radial mounting units 302 is 3:1 with the diameter dimension of the first insulation layer 102. Through the central support unit 301 and multiple linearly arranged radial mounting units 302, the axial direction of the industrial control cable can be supported at multiple points, which can meet the requirement of the industrial control cable maintaining a high-efficiency rebound effect during bending.

[0038] The central isolating frame 3035, positioning plate 3033, and sealing cover 3032 are all installed by connecting ball head 3034, which facilitates the positioning and installation of two adjacent flame-retardant filler bags 3036. At the same time, the flame-retardant filler bag 3036 is filled with liquid flame-retardant medium. When the industrial control cable is ignited, the flame-retardant filler bag 3036 will break and the liquid flame-retardant medium will flow out, thereby filling the inside of the industrial control cable and achieving a flame-retardant effect. In addition, the compression cavity between the central isolating frame 3035 and the flame-retardant filler bag 3036 can effectively meet the pressure deformation of the industrial control cable when it is squeezed.

[0039] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A polyethylene insulated industrial control cable with a multi-cavity isolation structure, comprising an outer protective assembly (1), characterized in that: An inner protective component (2) is installed inside the outer protective component (1). The inner protective component (2) includes a filling layer (201). Multiple battery cells (202) are installed inside the filling layer (201). Flame-retardant cavities (203) are provided between the multiple battery cells (202). A radial isolation component (3) is installed inside the flame-retardant cavity (203). The radial isolation component (3) is composed of a central support unit (301), multiple radial mounting units (302), and multiple elastic flame-retardant units (303). Multiple radial mounting units (302) are installed on the outer side of the central support unit (301). Each radial mounting unit (302) includes a double-headed tightening sleeve (3021). Both ends of the double-headed tightening sleeve (3021) are provided with multiple tightening relief grooves (3023). Multiple mounting plates (3025) are fixedly installed in the middle of the double-headed tightening sleeve (3021). A positioning ring (3024) is installed at one end of each mounting plate (3025). Multiple mounting spokes (3022) are installed on the outer side of the double-headed tightening sleeve (3021). Each of the mounting spokes (3022) has multiple elastic flame-retardant units (303) installed on its inner side. Each elastic flame-retardant unit (303) includes a soft cardboard shell (3031). A sealing cap (3032) is installed at one end of the soft cardboard shell (3031). A central isolation frame (3035) is installed in the middle of the inner side of the soft cardboard shell (3031). A positioning piece (3033) is installed at the end of the central isolation frame (3035) away from the sealing cap (3032). A connecting ball head (3034) is fixedly provided at the end of the sealing cap (3032) and the positioning piece (3033) that are close to each other. Flame-retardant filler bags (3036) are installed on both sides of the central isolation frame (3035).

2. The polyethylene insulated industrial control cable with a multi-cavity isolation structure according to claim 1, characterized in that: The central support unit (301) includes a central support wire (3011), and a first spiral layer is installed on the outer side of the central support wire (3011). The outer surfaces of the central support wire (3011), the first spiral layer and the second spiral layer are all provided with a second wrapping layer (3014).

3. The polyethylene insulated industrial control cable with a multi-cavity isolation structure according to claim 2, characterized in that: The outer protective component (1) includes a first insulating layer (102), the outer surface of the first insulating layer (102) is coated with a wear-resistant coating (101), a covering layer (103) is fixedly installed on the inner side of the first insulating layer (102), a plurality of cut-resistant nylon filaments (104) are fixedly installed inside the covering layer (103), and a shielding layer (105) is fixedly installed on the inner side of the covering layer (103).

4. The polyethylene insulated industrial control cable with a multi-cavity isolation structure according to claim 3, characterized in that: The battery cell unit (202) includes a second insulating layer (204), a first wrapping layer (205) is installed on the inner side of the second insulating layer (204), a polyethylene layer (206) is installed on the inner side of the first wrapping layer (205), and a plurality of battery cells (207) are fixedly installed inside the polyethylene layer (206). The second insulating layer (204) and the polyethylene layer (206) are fixedly connected through the first wrapping layer (205), and the plurality of battery cells (207) are arranged in parallel.

5. A polyethylene insulated industrial control cable with a multi-cavity isolation structure according to claim 4, characterized in that: Multiple cut-resistant nylon filaments (104) are arranged in a circumferential manner relative to the covering layer (103), and the covering layer (103) and the filling layer (201) are fixedly connected by a shielding layer (105).

6. A polyethylene insulated industrial control cable with a multi-cavity isolation structure according to claim 5, characterized in that: The central support unit (301) is inserted into the center of the filling layer (201), and a plurality of radial mounting units (302) are arranged linearly along the axis of the central support unit (301). The spacing between any two adjacent radial mounting units (302) is 3:1 with the diameter of the first insulating layer (102).

7. A polyethylene insulated industrial control cable with a multi-cavity isolation structure according to claim 6, characterized in that: Multiple mounting plates (3025) and mounting spokes (3022) are arranged circumferentially relative to the double-headed tightening sleeve (3021). The end of each mounting spoke (3022) away from the mounting plate (3025) is inserted between two adjacent battery cells (202). Multiple battery cells (202) and mounting spokes (3022) are arranged alternately in a circumferential pattern. One end of each mounting plate (3025) and mounting spoke (3022) is provided with a slot. The mounting spoke (3022) is inserted into the inner side of the mounting plate (3025). The positioning ring (3024) is inserted into the inner side of the slot. The mounting plate (3025) and mounting spoke (3022) are locked together by the positioning ring (3024).

8. A polyethylene insulated industrial control cable with a multi-cavity isolation structure according to claim 7, characterized in that: The soft cardboard shell (3031) is fixedly connected to the mounting spokes (3022). Multiple elastic flame-retardant units (303) on the inner side of each mounting spoke (3022) are arranged linearly. The sealing cover (3032) and the positioning piece (3033) are symmetrically arranged relative to the central isolation frame (3035). Both ends of the central isolation frame (3035) are snapped into the sealing cover (3032) and the positioning piece (3033).

9. A polyethylene insulated industrial control cable with a multi-cavity isolation structure according to claim 8, characterized in that: The flame-retardant filler bag (3036) is filled with liquid flame-retardant medium, and a compression chamber is provided between the central isolation frame (3035) and the two flame-retardant filler bags (3036).

10. A polyethylene insulated industrial control cable with a multi-cavity isolation structure according to claim 9, characterized in that: The central support wire (3011), the first spiral layer and the second spiral layer are all covered by the second wrapping layer (3014). The first spiral layer is formed by spirally winding multiple inner spiral wires (3012), and the second spiral layer is formed by spirally winding multiple outer spiral wires (3013).

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