CN201111987Y - Highway load cell cable - Google Patents

Abstract

The utility model relates to a highway weighing sensor cable, which is composed of an insulating wire core, a shielding layer and a sheath. The insulating wire cores are stranded to form an insulating wire core group, and the insulating wire core group is wrapped with the shielding layer and the sheath in turn. Its innovative point is: the shielding layer is composed of polyester aluminum-plastic composite film and tinned copper ground wire, the tinned copper ground wire is evenly wound in the outer edge gap of the insulated core group, and the sheath is coaxially wrapped in the shielding layer in turn Outer polyethylene inner sheath and polyurethane outer sheath. The utility model is simple in structure, reasonable in design, has good water resistance, wear resistance, flame retardancy and strong longitudinal pressure resistance, and solves the technical problem that the insulation resistance gradually decreases. Therefore, the utility model is suitable for laying in wet And in special environments that need to withstand greater ground pressure, and effectively ensure the accuracy of the measurement results of the weighing system used with it.

Description

Highway load cell cable

technical field

The utility model belongs to the field of cables for sensors, in particular to a highway weighing sensor cable.

Background technique

With the development of our country's traffic, people pay more and more attention to the supervision and control of vehicles on expressways. In order to ensure the safety of highway driving and reduce the probability of violations such as speeding and overloading, DCS-H highway vehicle high-speed dynamic weighing system is currently used to detect the weight of normal driving vehicles and classify them according to the pre-established vehicle category. The type table automatically identifies the vehicle type, etc., and at the same time uploads traffic information such as weight, speed, and lane flow to the supervision center of the road section to which it belongs.

At present, the cables used in conjunction with the DCS-H road vehicle high-speed dynamic weighing system are ordinary sensor cables, which generally have the following defects: 1. Since the cables need to be laid in the ground for a long time, and large vehicles often pass through them, Therefore, the load of the cable is increased, causing its insulation layer to be damaged due to long-term pressure, resulting in a decrease in insulation resistance and reducing the safety and reliability of the cable; 2. Most of the existing cable sheaths are single-layer flame-retardant sheaths. Therefore, the water resistance of the cable is poor, and the water molecules in the ground can easily penetrate into the cable, causing damage to the cable and a decrease in insulation resistance. Both of the above two defects will affect the accuracy of the measurement results of the weighing system, resulting in the supervisory center not being able to make timely and accurate decisions. Therefore, it is very necessary to develop a cable suitable for expressway weighing systems.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a highway weighing sensor cable, which has good pressure resistance, water resistance, and moisture resistance, and can be laid for a long time on wet ground and needs to withstand large ground In the special environment of pressure, it can effectively avoid the occurrence of cable insulation resistance drop.

The utility model solves its technical problem and realizes by taking the following technical solutions:

The expressway weighing sensor cable is composed of an insulated wire core, a shielding layer and a sheath. The insulated wire cores are twisted to form an insulated wire core group, and the insulated wire core group is wrapped with a shielding layer and a sheath in turn. The layer is composed of polyester aluminum-plastic composite film and tinned copper ground wire. The tinned copper ground wire is evenly wound in the outer edge gap of the insulated wire core group. The sheath is made of polyethylene inner sheath coaxially wrapped in sequence Cover and polyurethane outer sheath.

Moreover, the insulated wire core group is formed by twisting 4-20 insulated wire cores.

Moreover, the insulated wire core is composed of an inner conductor and an irradiated polyethylene insulating layer covering the inner conductor.

Advantage and positive effect of the present utility model are:

1. The insulation layer of the insulated wire core is made of irradiated polyethylene, which improves the temperature resistance level of the cable, makes it have good moisture resistance and high mechanical strength, and solves the problem that the cable is laid in humidity for a long time. , Under the high-voltage environment, the technical problems of insulation layer damage and gradual decline of insulation resistance ensure the safety and reliability of the cable.

2. The shielding layer adopts the structure of polyester-aluminum-plastic composite film with tinned copper ground wire, and the tinned copper ground wire is evenly wound in the outer edge gap of the insulated core group to avoid damage to the insulation caused by the long-term laying of the cable underground due to ground pressure The occurrence of the layer phenomenon greatly improves the safety of the cable.

3. The sheath adopts a double-layer sheath structure of waterproof polyethylene and flame-retardant polyurethane, which makes up for the defects of the traditional single sheath structure and ensures that the cable has good waterproof and flame retardancy.

4. Due to the improved safety of the cable, the water resistance and compression resistance have been greatly improved, thus ensuring that the weighing system used with it can obtain test data in a timely and accurate manner, which is conducive to the effective supervision of vehicles on the expressway with control.

5. The utility model is simple in structure, reasonable in design, has good water resistance, wear resistance, flame retardancy and strong longitudinal pressure resistance, and solves the technical problem of gradual decline in insulation resistance, so the utility model is suitable for long-term laying It is suitable for use in special environments that are wet and need to withstand high ground pressure, and effectively guarantee the accuracy of the measurement results of the weighing system used with it.

Description of drawings

Fig. 1 is a sectional view of the utility model.

Detailed ways

Embodiments of the utility model are described in further detail below in conjunction with the accompanying drawings:

A highway weighing sensor cable is composed of an insulated core, a shielding layer and a sheath. 4-20 adjacently arranged insulated wire cores are twisted to form an insulated wire core group, and there are 4 insulated wire cores in this embodiment. The shielding layer and the sheath are successively wrapped on the outside of the insulated core group.

The innovation of this utility model lies in that the insulating wire core is composed of the inner conductor 5 and the irradiated polyethylene insulating layer 4 covering it, so the cable has good moisture resistance and high mechanical strength, avoiding the insulation resistance The drop ensures the safety and reliability of the cable use.

The shielding layer is composed of polyester-aluminum-plastic composite film 3 and tinned copper ground wire 6. This structure can ensure good grounding performance of the cable and enhance the shielding effect. The tinned copper ground wire is evenly wound in the gap on the outer edge of the insulated core group to avoid damage to the insulation layer due to the long-term laying of the cable underground and to bear the ground pressure, which greatly improves the insulation and safety of the cable.

The sheath is composed of a waterproof polyethylene inner sheath 2 and a flame-retardant polyurethane outer sheath 1 coaxially wrapped outside the shielding layer in sequence. The double-layer sheath structure ensures that the cable has the advantages of good water resistance and flame retardancy.

Claims (3)

1. A highway weighing sensor cable is composed of an insulated wire core, a shielding layer and a sheath, and the insulated wire cores are twisted to form an insulated wire core group, and the insulated wire core group is wrapped with a shielding layer and a sheath successively outside the group, and its characteristics The reason is: the shielding layer is composed of polyester aluminum-plastic composite film and tinned copper ground wire, the tinned copper ground wire is evenly wound in the outer edge gap of the insulated core group, and the sheath is made of poly Consists of a vinyl inner sheath and a polyurethane outer sheath. 2. The expressway load cell cable according to claim 1, characterized in that: said insulated wire core group is formed by twisting 4-20 insulated wire cores. 3. The expressway load cell cable according to claim 1 or 2, characterized in that: the insulated core is composed of an inner conductor and an irradiated polyethylene insulating layer covering it.

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