signal cable

Usage

Sensor signal cables are used for signal transmission of various sensors and instruments.

The sensor signal cable adopts a silver-plated conductor and a multi-core structure to ensure that the resistance between each core is highly consistent, and the weak power signal can be accurately transmitted hundreds of meters away.

Structure

The sensor signal cable uses tin-plated or silver-plated conductors.

The sensor signal cable has four layers of protection, namely insulation layer, shielding layer, winding layer, and sheath layer, just to ensure the accurate transmission of weak power signals.

Insulation layer: The physical and chemical properties are equivalent to the sheath layer. The sheath, shielding net and winding layer can be removed in a small environment and used as a wire alone.

Winding layer: The winding layer is a selected polymer material, mainly to prevent the shielding net from hurting the insulation layer. It also enhances the overall mechanical properties of the cable.

Shielding layer: Exquisite metal materials (using copper or tinned copper), on the one hand, to smoothly derive interference signals, extremely thin metal wires must have sufficient resistance to bending Ability to avoid metal debris from affecting other electrical equipment.

Sheath layer: Excellent mechanical properties, able to withstand high-strength metal impact and cutting. It has very high tensile strength and can withstand long-term repeated bending.

Classification

Railway signal cable

1. Signal cable mainly refers to railway dedicated signal cable, suitable for the transmission of railway digital signal, audio signal or automatic signal device with rated voltage of AC 500V or DC 1000V and below Control circuit.

2. Product technical standards:

▲TB/T2476-1993 Railway Signal Cable

▲TB/T3100.1～.5-2004 "Railway Digital Signal cable"

▲Q/JTL051.33-2001 integrated shielded signal cable

3. The main models are:

Railway signal cable, railway integrated sheath Signal cables, railway aluminum sheathed signal cables, railway digital signal cables, railway internal shielded digital signal cables, railway axle counting signal cables, railway transponder data transmission cables.

4. Railway signal cable characteristics:

The ambient temperature of the cable is -45～+60℃, and the ambient temperature for laying is not lower than -10℃. The long-term working temperature of the cable conductor should not exceed 70°C. The aluminum sheathed cable has good shielding performance, and the comprehensive sheath has a certain shielding performance. It can be used in the main line of the railway electrification section or the area with strong electric interference. The bending radius of the cable is not less than 15-20 times the outer diameter.

5. The signal cable specifications are:

4, 6, 8, 9, 12, 14, 16, 19, 21, 24, 28, 30, 33, 37, 42, 44, 48, 52, 56, 61.

Minimum 4 cores, maximum 61 cores

6. Product functions

The railway digital signal cable has the ability to transmit analog signals (1MHz) and digital signals (2Mbit/s). ), rated voltage AC 750V or DC 1100V and below system control information and power transmission function. It is suitable for the transmission of control information, monitoring information and other related signal equipment and control devices such as railway signal automatic block system, axle counting, station electrical coding, computer interlocking, microcomputer monitoring, dispatching concentration, dispatching supervision, high-power electric point machine, etc. Electricity.

Mining signal cable

MHY32(PUYV39, PUYV39-1) mine polyethylene insulated flame retardant PVC sheathed single-layer steel wire armored signal cable for mine shaft

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Used as main signal cable in inclined shaft or vertical shaft

MHYVRP (PUYVRP) mine polyethylene insulated flame retardant PVC sheathed copper wire braided shielded soft mine signal cable

Used for underground roadway or inclined roadway as mining signal cable

MHYVP (PUYVP) mining polyethylene insulated flame-retardant PVC sheathed copper wire braided shielded mining signal cable

Field cooperation mine signal cable with large underground electromagnetic interference

MHYVR (PUYVR) mine polyethylene insulated flame retardant PVC sheathed soft mine signal cable

Used as signal cable in underground or inclined roadways

MHYV(1×22×21×45×2)×7/0.28 Polyethylene insulated PVC sheathed mine for coal mine Signal cable

Used in inclined lanes and electromechanical chambers

MHJYV4/0.28 copper wire+3/0.28 steel wire 1×22×2 reinforced core polyethylene insulation for coal mines Polyvinyl chloride sheathed signal cable for mines

Used for high mechanical damage to flat and inclined roadways

Cable direction box

 (1) Seven direction box ( HF-7 ) 

 There are 1 entrance and 7 exits, 7 terminal boards can be installed inside (up to 11 can be added), each terminal board has 7 terminals for the main cable The connection point with the branch cable.

(2) Four-way box (HF-4 ) 

  There is 1 entrance and 4 exits, 4 6-post terminal boards can be installed inside, each terminal board has 7 A terminal for the connection of the main cable and branch cable. 

Signal transformer box

 The signal transformer box can be used to connect signal equipment, the other is to place transformers and other equipment, and the third is to realize the relay and distribution of cables. It is generally used at the inbound signal, the outbound and shunting signal, and the power transmitting and receiving ends of the track circuit.  The signal transformer box has two types: XB1 and XB2. XB1 type has 4 lead-in (out) holes, 14 terminal boards can be placed inside, and each terminal board has 2 terminals. XB2 type has 5 lead-in (out) holes, 18 terminal boards can be placed inside, and each terminal board has 2 terminals.  

Terminal cable box

The terminal cable box is set at the end of the cable and is used to connect signal equipment. The terminal cable box has three types: HZ-24,  HZ-12 , and HZ0.

HZ-24 type cable box has a cable lead-in hole and a cable lead-out hole, which can be used for cable relay. A BZ4 type small transformer can be placed inside, and four 6-post terminal boards can be installed. That is, 24 terminals are connected to the device. 

HZ-12 type cable box has only one cable lead-in hole, that is, it can only enter and cannot exit. Two 6-post terminal boards can be installed inside, that is, 12 terminals, which can only be used at the end of the cable. 

HZ0 type cable box has no terminal board inside, it can only be installed at the sending and receiving end of the track circuit to realize the connection between the cable and the rail lead wire. 

The selection of cable terminal connection equipment corresponding to various signal equipment can be found in the table. 

When choosing, you should pay attention to the number of cable cores and the number of cable protection tubes, the capacity of the built-in equipment and the terminal board.