Flame-retardant electric wire and cable

Abstract

The utility model discloses a flame-retardant wire cable, which comprises a first-stage shell, a second-stage shell, a main connecting assembly and an auxiliary connecting assembly, flame-retardant layers are arranged on the inner surfaces of the first-stage shell and the second-stage shell, inner shells are arranged on the inner surfaces of the two groups of flame-retardant layers, wires are arranged in inner cavities of the two groups of inner shells, and the main connecting assembly is connected with the auxiliary connecting assembly. The main connecting assembly is arranged on the outer surface of the right side of the first-stage shell, the auxiliary connecting assembly is arranged on the outer surface of the left side of the second-stage shell, and flame-retardant rings are arranged on the outer surfaces of the first-stage shell and the second-stage shell. According to the flame-retardant wire and cable, the joint of the wire and cable is in threaded connection and sealed through the main connecting assembly and the auxiliary connecting assembly, the joint is protected, the situation that moisture, moisture and external factors intrude into the joint and consequently the wire is affected with damp and short circuit can be effectively prevented, and the joint can be prevented from being damaged by accidental touch of external objects and people; the connection stability between the wire and the cable is improved, so that poor connection caused by loosening or falling-off of the wire connection part is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of wires and cables, in particular to flame-retardant wires and cables. Background Art

[0002] Wires and cables are usually stranded by several or several groups of wires (at least two wires in each group), similar to ropes. The wires in each group are insulated from each other and often twisted around a central wire. The whole is covered with a highly insulating covering layer, and is mostly used for transmitting and distributing electric energy or transmitting electrical signals. During the use of existing power cables, high temperature will be generated during long-term overload operation, which will age the insulating layer. The temperature rise of the cable will damage the insulating layer and even cause a fire. For this reason, we have proposed a flame-retardant wire and cable.

[0003] For example, the patent document with the application number 202320759331.8 discloses a flame-retardant wire and cable, including a nickel-plated copper wire protective shell. A number of cable cores are arranged inside the protective shell. A copper-aluminum alloy heat-conducting sleeve is sleeved outside the cable cores. A filling layer is arranged between the heat-conducting sleeve and the protective shell. A fixing structure for restricting the movement of the cable cores is arranged between the heat-conducting sleeves. By arranging a fixing structure inside the protective shell, the cable cores can be effectively separated, preventing the cable cores inside the protective shell from shifting and winding together when the cable is wound and bent. When the cable is bent and squeezed, the telescopic rod is shortened under the pressure of the cable core, and the buffer spring on the telescopic rod deforms to generate elastic force, playing a buffering and protective role for the protective shell. When a fire occurs during the use of the cable, the inert gas inside the oxygen isolation layer can effectively isolate oxygen, and the flame-retardant liquid inside the flame-retardant package can extinguish the fire in time.

[0004] For similar flame-retardant wires and cables, due to the change of the position of electrical equipment or the insufficient length of the original line, it is necessary to extend the wires and cables to meet the wiring requirements. The wires and cables of many electrical equipment are not fixed, resulting in frequent movement. When the time is too long and frequent, and when it is oppressed by external objects or trampled by human error, the connection will become loose, causing a short circuit and triggering a circuit fault.

[0005] Therefore, in view of this, research and improvement are carried out on the existing structural deficiencies, and a flame-retardant wire and cable is proposed. Content of the Utility Model

[0006] The purpose of the utility model is to provide a problem that for flame-retardant wires and cables, due to the change of the position of electrical equipment or the insufficient length of the original line, it is necessary to extend the wires and cables to meet the wiring requirements. The wires and cables of many electrical equipment are not fixed, resulting in frequent movement. When the time is too long and frequent, and when it is oppressed by external objects or trampled by human error, the connection will become loose, causing a short circuit and triggering a circuit fault.

[0007] To achieve the above object, the utility model provides the following technical solutions: a flame-retardant wire and cable, including a primary housing, a secondary housing, a main connection component and a secondary connection component. The secondary housing is disposed on the right side of the primary housing. Flame-retardant layers are provided on the inner surfaces of both the primary housing and the secondary housing. Inner housings are provided on the inner surfaces of the two flame-retardant layers. Wires are disposed in the inner cavities of the two inner housings. There are several groups of the wires. The main connection component is disposed on the outer surface of the right side of the primary housing, and the secondary connection component is disposed on the outer surface of the left side of the secondary housing. Flame-retardant rings are provided on the outer surfaces of both the primary housing and the secondary housing. There are several groups of the flame-retardant rings.

[0008] Further, the main connection component includes a first mounting ring, a first sealing ring, a first connection ring, a washer and an internal thread. The first mounting ring is disposed on the right side of the outer surface of the primary housing. The first sealing ring is provided on the inner surface of the first mounting ring. The right end face of the first mounting ring is provided with the first connection ring. The right end face of the first connection ring is provided with the washer. The internal thread is provided on the inner surface of the first connection ring.

[0009] Further, the secondary connection component includes a second mounting ring, a second sealing ring, a second connection ring and an external thread. The second mounting ring is disposed on the left side of the outer surface of the secondary housing. The second sealing ring is provided on the inner surface of the second mounting ring. The left end face of the second mounting ring is provided with the second connection ring. The external thread is provided on the outer surface of the left side of the second connection ring.

[0010] Further, the positions of the five groups of wires are arranged adjacent to each other in a ring shape. The inner cavity of the flame-retardant layer is filled with a carbonizing agent. The materials of the primary housing, the secondary housing and the inner housing are all polyethylene. Several groups of the flame-retardant rings are arranged on the outer surfaces of the primary housing and the secondary housing at equal intervals.

[0011] Further, the aperture sizes of the internal thread and the external thread are equal, and the internal thread and the external thread are meshed with each other.

[0012] Further, the first sealing ring abuts against the contact surface between the primary housing and the first mounting ring, and the second sealing ring abuts against the contact surface between the secondary housing and the second mounting ring.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: By using the main connection component and the secondary connection component to perform threaded connection and sealing on the connection of the wire and cable, the connection is protected, which can effectively prevent moisture, humidity and external factors from invading the connection, causing the wire to be damp and short-circuited. Moreover, it can prevent external objects and human accidental contact from damaging the connection, improve the connection stability between the wire and cable, thereby preventing the loosening or falling off of the wire connection, resulting in poor connection. The specific content is as follows:

[0014] There are a primary housing, a secondary housing, a main connection component and a secondary connection component. The main connection component is sleeved on the primary housing, and the secondary connection component is sleeved on the secondary housing. When connecting the circuit, through the meshing function of the internal thread on the inner surface of the first connection ring in the main connection component and the external thread of the second connection ring in the secondary connection component, the user can rotate one of the main connection component or the secondary connection component to connect and fix along the thread track, preventing the loosening and falling off of the circuit connection caused by objects or humans, avoiding short circuits caused by poor connection and resulting in fires. And the connection between them is enhanced in sealing and tightness through gaskets. The first mounting ring and the second mounting ring are movably mounted on the outer surfaces of the primary housing and the secondary housing through the first sealing ring and the second sealing ring to ensure the sealing of the entire connection protection structure, thereby preventing liquid and object particles from invading the connection, causing the wire to be damp and the circuit to be blocked, resulting in a short circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural diagram of the flame-retardant wire and cable of the present utility model;

[0016] Figure 2 is a three-dimensional structural diagram of the connection of the flame-retardant wire and cable of the present utility model;

[0017] Figure 3 is a three-dimensional structural diagram of the wire of the flame-retardant wire and cable of the present utility model;

[0018] Figure 4 is the Figure 1 partial enlarged structural diagram at A in the present utility model.

[0019] In the figure: 1, primary housing; 2, secondary housing; 3, inner housing; 5, flame-retardant layer; 6, wire; 7, main connection component; 701, first mounting ring; 702, first sealing ring; 703, first connection ring; 704, gasket; 705, internal thread; 8, secondary connection component; 801, second mounting ring; 802, second sealing ring; 803, second connection ring; 804, external thread; 9, flame-retardant ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following further describes in detail the implementation manners of the present utility model in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0021] As Figures 1 to 4 shown, the flame-retardant wire and cable includes a primary housing 1, a secondary housing 2, a main connection component 7 and a sub-connection component 8. The secondary housing 2 is disposed on the right side of the primary housing 1. Inner housings 3 are provided on the inner surfaces of two groups of flame-retardant layers 5. The materials of the primary housing 1, the secondary housing 2 and the inner housing 3 are all polyethylene. The primary housing 1, the secondary housing 2 and the inner housing 3 are all insulating protective layers of the wire 6. Flame-retardant layers 5 are provided on the inner surfaces of the primary housing 1 and the secondary housing 2. A carbonizing agent is filled in the inner cavity of the flame-retardant layer 5. The flame-retardant layer 5 will undergo a carbonization reaction at high temperatures to form a carbonized layer. This carbonized layer can isolate the material from contact with the flame and prevent the further spread of the flame. Wires 6 are provided in the inner cavities of two groups of inner housings 3. There are several groups of wires 6. The positions of five groups of wires 6 are arranged adjacent to each other in a ring shape. The five groups of wires 6 are components for transmitting signals and can transmit electrical energy signals from one place to another to realize the normal operation of electrical equipment. Flame-retardant rings 9 are provided on the outer surfaces of the primary housing 1 and the secondary housing 2. There are several groups of flame-retardant rings 9. The several groups of flame-retardant rings 9 are arranged on the outer surfaces of the primary housing 1 and the secondary housing 2 at equal intervals. The flame-retardant rings 9 can prevent the spread of the flame during a fire through the characteristics of the flame-retardant material, provide multiple layers of flame retardancy, prevent the fire from spreading, and thus protect the safety of equipment and personnel;

[0022] The main connection component 7 is disposed on the outer surface on the right side of the primary housing 1. The main connection component 7 and the sub-connection component 8 are connected to each other to jointly form an interface connection sealing structure. The main connection component 7 includes a first mounting ring 701, a first sealing ring 702, a first connection ring 703, a washer 704 and an internal thread 705. The first mounting ring 701 is disposed on the right side of the outer surface of the primary housing 1. The first mounting ring 701 is responsible for mounting the main connection component 7 on the surface of the primary housing 1. A first sealing ring 702 is provided on the inner surface of the first mounting ring 701. The first sealing ring 702 abuts on the contact surface between the primary housing 1 and the first mounting ring 701. Through the cooperation of the first sealing ring 702, the first mounting ring 701 abuts on the surface of the primary housing 1, thereby ensuring the sealing effect of the main connection component 7 and preventing the intrusion of liquid and particulate matter at the connection. A first connection ring 703 is provided on the right end surface of the first mounting ring 701. The first connection ring 703 provides a connection interface with the sub-connection component 8. A washer 704 is provided on the right end surface of the first connection ring 703. The washer 704 ensures the connection sealing between the main connection component 7 and the sub-connection component 8 and prevents leakage. An internal thread 705 is provided on the inner surface of the first connection ring 703. The internal thread 705 provides the connection function of the threaded structure;

[0023] The secondary connection assembly 8 is arranged on the outer surface of the left side of the secondary housing 2. The secondary connection assembly 8 is a component that constitutes an interface connection sealing structure. The secondary connection assembly 8 includes a second mounting ring 801, a second sealing ring 802, a second connection ring 803 and an external thread 804. The second mounting ring 801 is arranged on the left side of the outer surface of the primary housing 1. The second mounting ring 801 is used for sleeving and installing on the surface of the secondary housing 2 to provide a limiting effect. A second sealing ring 802 is arranged on the inner surface of the second mounting ring 801. The second sealing ring 802 abuts on the contact surface between the secondary housing 2 and the second mounting ring 801. Through the cooperation with the second mounting ring 801, the second sealing ring 802 abuts on the outer surface of the secondary housing 2, so as to realize the function of connection sealing, form a sealing layer, and prevent the leakage of liquid and particulate matter. A second connection ring 803 is arranged on the left end face of the second mounting ring 801. An external thread 804 is provided on the outer surface of the left side of the second connection ring 803. The external thread 804 provides the meshing function of threaded connection. The aperture sizes of the internal thread 705 and the external thread 804 are equal, and the internal thread 705 and the external thread 804 are meshed with each other. By rotating the main connection assembly 7, the internal thread 705 can be driven to rotate, so as to rotate and tighten and fix along the threaded outer surface of the external thread 804, achieving the effect of fixing the seal at the connection. In this way, after the main connection assembly 7 and the secondary connection assembly 8 are combined and installed, it can prevent objects or people from loosening or damaging the connection of the wire and cable, so as to prevent affecting the line connection effect at the connection.

[0024] In summary, as Figures 1 to 4 shown, for this flame-retardant wire and cable, the five groups of wires 6 are insulated and protected by the primary housing 1, secondary housing 2 and inner housing 3 made of polyethylene material, and the wires 6 are wrapped. When a short circuit occurs in the line and causes the line to catch fire, after the inner housing 3 is burned, the flame-retardant layer 5 is exposed. The flame-retardant layer 5 will undergo a carbonization reaction under high-temperature combustion to form a carbonized layer. This carbonized layer can isolate the contact between the material and the flame, prevent the further spread of the flame, and block the combustible areas of different sections of the wires 6 through the flame-retardant ring 9, and conduct layer-by-layer flame retardance, so as to prevent the fire from spreading. When the line is connected, the internal thread 705 on the inner surface of the first connection ring 703 in the main connection assembly 7 meshes with the external thread 804 of the second connection ring 803 in the secondary connection assembly 8, so that the user can rotate one of the main connection assembly 7 or the secondary connection assembly 8 to connect and fix along the threaded track, and a soft layer buffer is provided at the junction through the washer 704 to increase the sealing performance at the connection. The first mounting ring 701 and the second mounting ring 801 abut on the main connection assembly 7 and the secondary connection assembly 8 and the housing through the first sealing ring 702 and the second sealing ring 802 respectively, so as to achieve the sealing effect.

Claims

1. A flame-retardant wire and cable, comprising a primary housing (1), a secondary housing (2), a primary connection component (7) and a secondary connection component (8), characterized in that: The secondary shell (2) is arranged on the right side of the primary shell (1); the inner surfaces of the primary shell (1) and the secondary shell (2) are both provided with a flame retardant layer (5); the inner surfaces of the two groups of the flame retardant layers (5) are both provided with an inner shell (3); the inner cavities of the two groups of the inner shells (3) are both provided with electric wires (6); the electric wires (6) are provided in a plurality of groups; the main connection component (7) is arranged on the outer surface of the right side of the primary shell (1); the auxiliary connection component (8) is arranged on the outer surface of the left side of the secondary shell (2); the outer surfaces of the primary shell (1) and the secondary shell (2) are both provided with flame retardant rings (9); the flame retardant rings (9) are provided in a plurality of groups.

2. The flame-retardant wire and cable according to claim 1, characterized in that: The main connection assembly (7) comprises a first mounting ring (701), a first sealing ring (702), a first connecting ring (703), a gasket (704) and an internal thread (705); the first mounting ring (701) is arranged on the right side of the outer surface of the first-stage shell (1); the inner surface of the first mounting ring (701) is provided with a first sealing ring (702); the right end surface of the first mounting ring (701) is provided with a first connecting ring (703); the right end surface of the first connecting ring (703) is provided with a gasket (704); and the inner surface of the first connecting ring (703) is provided with an internal thread (705).

3. The flame-retardant wire and cable according to claim 2, characterized in that: The auxiliary connection component (8) comprises a second mounting ring (801), a second sealing ring (802), a second connecting ring (803) and an external thread (804); the second mounting ring (801) is arranged on the left side of the outer surface of the first-stage shell (1); the inner surface of the second mounting ring (801) is provided with a second sealing ring (802); the left end surface of the second mounting ring (801) is provided with a second connecting ring (803); and the outer surface of the left side of the second connecting ring (803) is provided with an external thread (804).

4. The flame-retardant wire and cable according to claim 3, characterized in that: The five groups of electric wires (6) are arranged adjacent to each other in a ring shape, the inner cavity of the flame retardant layer (5) is filled with a carbonizing agent, the primary shell (1), the secondary shell (2) and the inner shell (3) are all made of polyethylene, and a plurality of groups of flame retardant rings (9) are arranged at equal intervals on the outer surfaces of the primary shell (1) and the secondary shell (2).

5. The flame-retardant wire and cable according to claim 4, characterized in that: The internal thread (705) and the external thread (804) have the same aperture size, and the internal thread (705) and the external thread (804) are meshed with each other.

6. The flame-retardant wire and cable according to claim 5, characterized in that: The first sealing ring (702) abuts against the contact surface between the primary housing (1) and the first mounting ring (701), and the second sealing ring (802) abuts against the contact surface between the secondary housing (2) and the second mounting ring (801).

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