Leakage cable, connector and installation method for power supply and information transmission

Abstract

The application relates to the technical field of communication cables, in particular to a leaky cable capable of realizing power supply and information transmission, a connector and a mounting method. An outer conductor is coated on the outer surface of an inner conductor tube, a first insulating layer is arranged between the inner conductor tube and the outer conductor, a sheath layer is coated on the outer surface of the outer conductor, and a power line pair is arranged in the inner conductor tube. A center inner conductor is arranged in the inner cavity of the outer conductor shell, an insulating gasket is arranged between the center inner conductor and the outer conductor shell, a front screw sleeve is arranged at one end of the outer conductor shell, and a rear screw sleeve is arranged at the other end of the outer conductor shell; an insulating core is arranged between the outer conductor shell and the center inner conductor shell body, and a soft cable is arranged in the center inner conductor shell body. The power line pair is arranged in the inner conductor tube, the on-site construction intensity is reduced, and the power line pair can realize signal transmission, coverage and equipment power supply and other requirements at one time; the fire hazard is reduced; the outer sheath process of the power line does not need to be considered, and the input and output of communication signals and electric signals can be realized at the same time.

Description

Technical Field

[0001] This invention relates to the field of communication cable technology, and in particular to a leaky cable, connector, and installation method that enables power supply and information transmission. Background Technology

[0002] With the rapid development of mobile communication technology, mobile communication standards are constantly being upgraded to meet the demands of high-speed and high-bandwidth communication, and the wireless frequencies used in communication applications are also increasing. The 2G standard mainly operates at frequencies between 900MHz and 1800MHz, while the 3G standard mainly operates around 2000MHz. The 4G global mobile communication standard has been largely unified, mainly divided into TD-LTE and FDD-LTE, using more operating frequency bands, with the highest operating frequency reaching 3600MHz to 3800MHz. The 5G communication currently under construction continues to use higher wireless frequencies, divided into FR1 and FR2. FR1's highest operating frequency reaches 4.4GHz to 5.0GHz, while FR2 has entered the millimeter wave range, reaching 24.25GHz to 52.6GHz.

[0003] The increase in mobile communication operating frequencies has led to increased transmission attenuation in communication cables, especially for leaky cables which need to simultaneously transmit signals and cover surrounding signals. Leaky cables, also known as leaky coaxial cables or leaky coaxial cables, require a series of active devices such as power amplifiers to amplify the signal in the middle of the cable's installation to effectively improve signal coverage distance and range. However, the power supply for these active devices has always been a major concern in the industry.

[0004] First, leaky cables are generally laid in narrow environments such as subways, tunnels, supermarkets, and underground parking lots. In areas with limited space, the laying of additional communication power lines will inevitably follow the leaky cable, thereby interfering with the transmission and reception of communication signals within the high-frequency signal coverage area of ​​the leaky cable.

[0005] Secondly, the increased installation of communication power cables poses a fire hazard due to power cable failures. Therefore, communication power cables require strict fire resistance and flame retardant ratings, which increases production costs.

[0006] Furthermore, laying power lines on a large scale in areas such as subways and supermarkets requires strict permits and qualifications, which are typically not available to companies in the telecommunications sector.

[0007] Therefore, it is necessary to provide a leaky cable that can effectively solve the above problems. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a leaky cable, connector and installation method that can realize signal transmission, coverage and power supply without affecting the electromagnetic field signal in the area covered by the leaky cable, and can be quickly deployed, improve the efficiency of deployment and construction and reduce fire hazards.

[0009] The technical solution adopted by this invention to solve its technical problem is: a leaky cable that can realize power supply and information transmission, including an inner conductor tube, an outer conductor covering the outer surface of the inner conductor tube, a first insulation layer between the inner conductor tube and the outer conductor, a sheath layer covering the outer surface of the outer conductor, and a power wire pair running inside the inner conductor tube. This will not affect the high-frequency electromagnetic signal transmission and reception of the leaky cable to the outside, and will also reduce fire hazards and the inconvenience of secondary wiring construction.

[0010] Furthermore, several conical plugs are installed at intervals on the power cord pair, and the power cord pair consists of two parallel cable wires.

[0011] Furthermore, each cable line includes an inner conductor and an insulation layer arranged sequentially from the inside out, and cable clamps are installed at both ends of each cable line.

[0012] Furthermore, the inner conductor tube is a smooth copper tube or a spiral-welded copper tube.

[0013] Furthermore, multiple sets of leakage slots are formed on the conductor sidewall of the outer conductor.

[0014] A connector for a leaky cable that enables power supply and information transmission is used to be installed at both ends of a leaky cable. It includes a central inner conductor, an outer conductor shell, a front threaded sleeve, and a rear threaded sleeve. The central inner conductor is installed in the inner cavity of the outer conductor shell. An insulating gasket is provided between the central inner conductor and the outer conductor shell. A front threaded sleeve is installed at one end of the outer conductor shell, and a rear threaded sleeve is installed at the other end of the outer conductor shell. A circular hole is provided on the shell of the outer conductor shell.

[0015] The inner conductor comprises a flexible cable and an inner conductor shell. An insulating core is installed between the outer conductor shell and the inner conductor shell. Symmetrical circular holes are formed on the inner conductor shell.

[0016] A flexible cable is threaded through the inner conductor shell. The front end of the flexible cable is led out from the top of the inner conductor, and the rear end is led out through symmetrical circular holes and then through corresponding circular holes on the outer conductor shell to the outside of the connector.

[0017] Furthermore, the flexible cable includes an inner conductor and a second insulation layer. The inner conductor is made of multiple strands of soft copper wire twisted together, which facilitates bending and installation. At the same time, the use of silver-plated soft copper wire material can reduce the resistance and reduce the outer diameter of the flexible cable. The outer surface of the inner conductor is covered with a second insulation layer. Both ends of the flexible cable are equipped with cable clamps. One end of the flexible cable is connected to the power supply line through the cable clamp, and the other end is connected to the power supply or power supply equipment through the cable clamp.

[0018] Furthermore, the insulating pad has an insulating core on both the front and rear sides, and the insulating pad has a through hole along the axial direction for the flexible cable to pass through.

[0019] Furthermore, the central axis of the symmetrical circular hole is set to coincide with the central axis of the circular hole.

[0020] A method for installing a leaky cable and connector capable of power supply and information transmission, comprising a leaky cable and connector for power supply and information transmission, and the installation steps are as follows:

[0021] Step 1: In the factory, install tapered plugs at regular intervals on each individual cable;

[0022] Step 2: Inside the factory, thread the two cables obtained in Step 1 into the inner conductor tube of the pre-processed leaky cable;

[0023] Step 3: At the construction site, install connectors at both ends of the leaky cable and connect the cable clamp at one end of the flexible cable to the single cable wire.

[0024] Step 4: Connect the cable clamp at the other end of the flexible cable leading out from the outer conductor shell to the lead wire. Connect one end of the lead wire to the power source and the other end to the equipment that needs power.

[0025] The beneficial effects of this invention are that it solves the defects existing in the background technology. 1. By placing the power cord in the inner conductor tube of the leaky cable, the on-site construction intensity is reduced, and various needs such as signal transmission, coverage and equipment power supply can be achieved at the same time in one wiring.

[0026] 2. Place the power cord inside the inner conductor tube of the leaky cable. Since the inner conductor tube itself is non-combustible, the fire hazard is reduced.

[0027] 3. By placing the power cord pair inside the inner conductor tube of the leaky cable, the outer sheath process of the power cord pair can be eliminated, reducing production costs.

[0028] 4. Connectors can simultaneously input and output communication signals and electrical signals, reducing production costs and improving construction efficiency;

[0029] 5. It has a simple structure, low production cost, is easy to deploy and can be flexibly deployed. It is easy to operate and has a wide range of applications. Attached Figure Description

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] Figure 1 This is a schematic diagram of the structure of the leaky cable for power supply and information transmission according to the present invention;

[0032] Figure 2 This is the present invention. Figure 1 A sectional view;

[0033] Figure 3 This is a schematic diagram of the power supply line pair of the present invention;

[0034] Figure 4 This is a schematic diagram of the connector structure of the present invention;

[0035] Figure 5 This is the present invention. Figure 4 A sectional view;

[0036] Figure 6 This is a schematic diagram of the structure of the flexible cable of the present invention;

[0037] Figure 7 This is a schematic diagram of the connection between the cable and the connector of the present invention;

[0038] In the diagram: 1. Power cord pair, 2. Leaky cable, 3. Connector, 11. Single cable wire.

[0039] 21. Inner conductor tube; 22. First insulating layer; 23. Outer conductor; 24. Sheath layer; 25. Leakage groove.

[0040] 31. Inner conductor, 32. Insulating gasket, 33. Outer conductor shell, 34. Front threaded sleeve, 35. Rear threaded sleeve, 36. Round hole, 37. Through hole.

[0041] 111. Single-wire inner conductor; 112. Single-wire insulation layer; 113. Cable clamp; 114. Conical plug.

[0042] 311. Flexible cable; 312. Insulating core; 313. Inner conductor shell; 314. Symmetrical circular holes.

[0043] 3111. Inner conductor; 3112. Second insulation layer; 3113. Cable clamp. Detailed Implementation

[0044] The present invention will now be described in further detail with reference to the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0045] like Figures 1-3 The leaky cable shown includes an inner conductor tube 21, an outer conductor 23 covering the outer surface of the inner conductor tube 21, a first insulation layer 22 between the inner conductor tube 21 and the outer conductor 23, a sheath layer 24 covering the outer surface of the outer conductor 23, and a power supply pair 1 passing through the inner conductor tube 21.

[0046] like Figure 3 As shown, several conical plugs 114 are installed at intervals on the power cord pair 1. The conical plugs 114 are made of rubber and are used to facilitate the placement of the power cord pair 1 inside the inner conductor tube 21. The power cord pair 1 can be sucked out from the other end of the inner conductor tube 21 by using air suction at one end of the inner conductor tube 21 and by using negative pressure. In addition, it is convenient to fix the power cord pair 1 and prevent the power cord pair 1 from falling out of the inner conductor tube 21 during the laying process. The maximum outer diameter of the conical plug 114 is slightly smaller than the inner diameter of the inner conductor tube 21 by 1mm to 2mm.

[0047] The power cord pair 1 consists of two parallel cable wires 11, which respectively constitute the live wire and neutral wire required for power supply. The two cable wires 11 are placed inside the inner conductor tube 21, so there is no need to consider the sheath layer required by conventional power cords, thus reducing the overall production cost. At the same time, since the inner conductor tube 21 is a copper tube, which is flame retardant, the fire hazard caused by the production of single cable wires can be eliminated.

[0048] like Figure 1 , 3 As shown, the single cable 11 includes a single inner conductor 111 and a single insulation layer 112 arranged sequentially from the inside to the outside. The two single cables 11 are distinguished by single insulation layers 112 of different colors, such as red for the live wire and black for the neutral wire. Other colored stripes or bands can also be used to avoid wiring confusion and facilitate use. Cable clamps 113 are installed at both ends of the single cable 11.

[0049] like Figure 2 As shown, the inner conductor tube 21 is a smooth copper tube or a spiral-welded copper tube, while the other parts are made of conventional leaky cable materials and structures. If a spiral-welded copper tube is used, the power cable pair 1 can be laid inside the copper tube simultaneously with the spiral welding process. Because the spiral-welded copper tube has greater internal friction than the smooth copper tube, it is not convenient to place the power cable pair using a negative pressure suction method.

[0050] like Figure 1As shown, multiple sets of leakage slots 25 are formed on the conductor sidewall of the outer conductor 23. The adjacent leakage slots 25 are arranged symmetrically or in parallel. The shape and combination of the leakage slots 25 can be designed according to communication requirements.

[0051] According to the working principle of coaxial cable transmission, the high-frequency electromagnetic field that enables signal transmission in coaxial cable is transmitted between the outer surface of its inner conductor tube 21, the inner surface of its outer conductor 23, and the first insulation layer 22 in between. Therefore, the power line pair 1 placed in the inner conductor tube 21 will not affect the transmission function of the coaxial cable.

[0052] As a special specification product among coaxial cables, leaky cables, while fulfilling their signal transmission function, also transmit and receive communication signals in the surrounding coverage area through multiple sets of leaky slots 25 on the outer conductor 23 of the leaky cable. If other cables are laid within the coverage area of ​​the leaky cable, the metal conductors in the cables will affect the propagation of high-frequency electromagnetic signals.

[0053] like Figures 4-6 As shown, a connector for a leaky cable that enables power supply and information transmission is used to be installed at both ends of a leaky cable. It includes a central inner conductor 31, an outer conductor shell 33, a front screw sleeve 34, and a rear screw sleeve 35. The central inner conductor 31 is installed in the inner cavity of the outer conductor shell 33. An insulating gasket 32 ​​is provided between the central inner conductor 31 and the outer conductor shell 33. The front screw sleeve 34 is installed at one end of the outer conductor shell 33, and the rear screw sleeve 35 is installed at the other end of the outer conductor shell 33. A circular hole 36 is opened on the shell of the outer conductor shell 33.

[0054] The inner conductor 31 includes a flexible cable 311 and an inner conductor shell 313. An insulating core 312 is installed between the outer conductor shell 33 and the inner conductor shell 313. The inner conductor shell 313 has symmetrical circular holes 314.

[0055] Two flexible cables 311 are threaded inside the inner conductor housing 313, which can introduce power supply function without affecting the communication function between the connector and the leaky cable. The front ends of the two flexible cables 311 are led out from the top of the inner conductor 31, and the rear ends are led out from the symmetrical circular holes 314, and then led out to the outside of the connector through the corresponding circular holes 36 on the outer conductor housing 33.

[0056] like Figure 6As shown, the flexible cable 311 includes an inner conductor 3111 and a second insulation layer 3112. The inner conductor 3111 is made of multiple strands of silver-plated soft copper wire twisted together. The use of silver-plated soft copper wire reduces the resistance and outer diameter of the flexible cable. Due to the limited space in the inner conductor 31, the flexible cable 311, under the condition of a limited outer diameter, must ensure higher conductivity while being sufficiently flexible and bendable to exit through the symmetrical circular holes 314. The outer surface of the inner conductor 3111 is covered with a second insulation layer 3112, which is made of polytetrafluoroethylene (PTFE) to improve the cable's high-temperature resistance.

[0057] Both ends of the flexible cable 311 are welded with cable clamps 3113. One end of the flexible cable 311 is connected to the power line pair 1 through the cable clamp 3113, and the other end is connected to the power supply or power supply equipment through the cable clamp 3113. Thus, this leaky cable and its connector, which can realize power supply and information transmission, can realize signal transmission, coverage and power supply without affecting the electromagnetic field signal in the area covered by the leaky cable. It can also be quickly deployed, improving the efficiency of deployment and construction and reducing fire hazards.

[0058] like Figure 5 As shown, the insulating pad 32 has an insulating core 312 on both the front and rear sides, and the insulating pad 32 has a through hole 37 along the axial direction for the flexible cable 311 to pass through.

[0059] like Figure 5 As shown, the central axis of the symmetrical circular hole 314 coincides with the central axis of the circular hole 36, which facilitates the extension of the two flexible cables 311 to the outside of the connector without affecting the fastening device between the connector and the cables and equipment.

[0060] According to the working principle of coaxial cable connectors, when the connector is connected to the coaxial cable, the high-frequency electromagnetic field will be transmitted between the central inner conductor shell 313 and the outer conductor shell 33 of the connector through the coaxial cable. The internal structure of the central inner conductor 31 does not affect the performance of the connector.

[0061] A method for installing a leaky cable and connector capable of power supply and information transmission, comprising a leaky cable and connector capable of power supply and information transmission, wherein the installation steps are as follows:

[0062] Step 1: In the factory, install conical plugs 114 at regular intervals on the single cable 11;

[0063] Step 2: In the factory, thread the two single wires 11 of the cable obtained in Step 1 into the inner conductor tube 21 of the pre-processed leaky cable 2;

[0064] Step 3: At the construction site, install specially designed connectors 3 at both ends of the leaky cable 2, and connect the cable clamp 3113 at one end of the flexible cable 311 to the single cable 11.

[0065] Step 4: The cable clamp 3113 at the other end of the flexible cable 311 leading out from the outer conductor shell 33 is connected to the lead wire. One end of the lead wire is connected to the power supply, and the other end is connected to the equipment that needs to be powered.

[0066] At the same time, depending on the transmission distance, multiple cables can be spliced ​​together. Customers can add active devices such as power amplifiers in the middle section of the cable laying to amplify the signal as needed.

[0067] Therefore, this leaky cable and its connector, which can realize power supply and information transmission, can achieve signal transmission, coverage and power supply without affecting the electromagnetic field signal in the area covered by the leaky cable. It can also be deployed quickly, improving the efficiency of deployment and construction and reducing fire hazards.

[0068] The above description is only a specific embodiment of the present invention. Various examples and illustrations do not constitute a limitation on the substantive content of the present invention. Those skilled in the art can make modifications or variations to the above-described specific embodiments after reading the specification without departing from the substance and scope of the invention.

Claims

1. A leaky cable capable of power supply and information transmission, characterized in that: The cable includes a leaky cable body (2), which includes an inner conductor tube (21). An outer conductor (23) is wrapped around the outer surface of the inner conductor tube (21). A first insulation layer (22) is provided between the inner conductor tube (21) and the outer conductor (23). A sheath layer (24) is wrapped around the outer surface of the outer conductor (23). A power supply pair (1) is passed through the inner conductor tube (21). It also includes connectors installed at both ends of the leaky cable body (2). The connectors include a central inner conductor (31), an outer conductor shell (33), a front screw sleeve (34), and a rear screw sleeve (35). The central inner conductor (31) is installed in the inner cavity of the outer conductor shell (33). An insulating gasket (32) is provided between the central inner conductor (31) and the outer conductor shell (33). A front screw sleeve (34) is installed at one end of the outer conductor shell (33), and a rear screw sleeve (35) is installed at the other end of the outer conductor shell (33). A round hole (36) is opened on the shell of the outer conductor shell (33). The inner conductor (31) includes a flexible cable (311) and an inner conductor shell (313). An insulating core (312) is installed between the outer conductor shell (33) and the inner conductor shell (313). Symmetrical circular holes (314) are provided on the inner conductor shell (313). A flexible cable (311) is inserted inside the inner conductor housing (313). The front end of the flexible cable (311) is led out from the top of the inner conductor (31), and its rear end is led out from the symmetrical circular hole (314) and led out to the outside of the connector through the corresponding circular hole (36) on the outer conductor housing (33). Both ends of the flexible cable (311) are equipped with cable clamps (3113). One end of the flexible cable (311) is connected to the power supply pair (1) through the cable clamp (3113), and the other end is connected to the power supply or power supply equipment through the cable clamp (3113).

2. The leaky cable capable of power supply and information transmission as described in claim 1, characterized in that: The power cable pair (1) is equipped with several conical plugs (114) at intervals, and the power cable pair (1) consists of two parallel cable single wires (11).

3. The leaky cable capable of power supply and information transmission as described in claim 2, characterized in that: The cable single wire (11) includes a single wire inner conductor (111) and a single wire insulation layer (112) arranged sequentially from the inside to the outside, and cable clamps (113) are installed at both ends of the cable single wire (11).

4. The leaky cable capable of power supply and information transmission as described in claim 1, characterized in that: The inner conductor tube (21) is a smooth copper tube or a spiral welded copper tube.

5. The leaky cable capable of power supply and information transmission as described in claim 1, characterized in that: The outer conductor (23) has multiple sets of leakage slots (25) on its conductor sidewall.

6. The leaky cable capable of power supply and information transmission as described in claim 1, characterized in that: The flexible cable (311) includes an inner conductor (3111) and a second insulation layer (3112). The inner conductor (3111) is made of multiple strands of flexible wire twisted together. The outer surface of the inner conductor (3111) is covered with the second insulation layer (3112). Cable clamps (3113) are installed at both ends of the flexible cable (3111).

7. The leaky cable capable of power supply and information transmission as described in claim 1, characterized in that: The insulating pad (32) is provided with insulating cores (312) on both the front and rear sides, and the insulating pad (32) is provided with through holes (37) along the axial direction for the flexible cable (311) to pass through.

8. The leaky cable capable of power supply and information transmission as described in claim 1, characterized in that: The central axis of the symmetrical circular hole (314) is set to coincide with the central axis of the circular hole (36).

9. A method for installing a leaky cable and connector capable of power supply and information transmission, comprising the leaky cable capable of power supply and information transmission as described in any one of claims 1 to 8, wherein the installation steps are as follows: Step 1: In the factory, install conical plugs (114) at regular intervals on the single cable (11). Step 2: In the factory, insert the two single cable wires (11) obtained in Step 1 into the inner conductor tube (21) of the pre-processed leaky cable body (2); Step 3: In the construction site, install connectors (3) at both ends of the leaky cable body (2) and connect the cable clamp (3113) at one end of the flexible cable (311) to the single cable (11). Step 4: Connect the cable clamp (3113) at the other end of the flexible cable (311) led out from the outer conductor shell (33) to the lead wire. Connect one end of the lead wire to the power supply and the other end to the equipment that needs to be powered.

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