CN102545121A - Method for connecting hydraulic tension resistant wire clip with lead - Google Patents

Abstract

The invention provides a method for connecting wires with a hydraulic tension clamp, the tension clamp includes an aluminum tube for the tension clamp and a steel anchor for the tension clamp, and it is characterized in that the hydraulic tension clamp connects The method for conducting wires comprises the following steps: (1) peeling off a section of the outer twisted wire at the connecting end of the wire to expose the inner core; (2) setting the steel anchor of the tension clamp on the outer side of the inner core after stripping the outer twisted wire at the connecting end of the wire (3) the inner core after the steel anchor crimping wire of the tension wire clamp is stripped of the outer stranded wire; (4) the aluminum tube of the tension wire clamp is arranged on the outside of the wire and the steel anchor of the tension wire clamp; (5) The aluminum tube of the tension clamp is crimped sequentially from the non-connecting end side of the wire to the middle, skipping the non-pressing area and pressing all the way to the connecting end side of the wire. The invention provides a method for connecting wires with hydraulic tension clamps, which can reduce the loose strands of the wires when the tension clamps are crimped, and improve the quality of hydraulic construction.

Description

A method for connecting wires with a hydraulic tension clamp

technical field

The invention relates to the technical field of transmission line connection, in particular to a method for connecting conductors with a hydraulic tension clamp.

Background technique

The wire tension clamp is a metal fitting that connects the wire to the tension insulator string. The tension clamp is directly installed with the wire and transmits the mechanical load and the electrical load. It is an important hardware in the overhead transmission line. According to different connection types, strain clamps usually have several types such as bolt type, clamp type, hydraulic type, burst type, wedge type, and pre-twisted type.

The most widely used conductors in overhead transmission lines are steel-cored aluminum stranded wires. Steel-cored aluminum stranded wires are single-layer or multi-layer aluminum wires stranded outside galvanized steel core wires. The wire tension clamps are mostly hydraulic. Process and wire connection transfer mechanical and mechanical loads. The hydraulic tension clamp for steel-reinforced aluminum stranded wire consists of two parts: aluminum crimped aluminum tube and steel anchor. The aluminum tube is used to connect with the aluminum stranded wire of the steel-reinforced aluminum stranded wire. , the steel anchor is used to connect with the steel core part of the steel-cored aluminum stranded wire, both of which are plastically deformed under pressure, so that they are respectively combined with the stranded wire and the steel core as a whole, and at the same time, the aluminum tube is connected by pressure. The root of the steel anchor connects the entire tension clamp with the steel-cored aluminum stranded wire. The crimping direction of the traditional tension clamp hydraulic process is from the middle of the tension clamp to the side of the aluminum tube when crimping the aluminum tube. The specific pressure sequence diagram of the tension clamp aluminum tube is shown in Figure 1 It shows that in hydraulic construction, the elastic modulus of the aluminum wire of conductor 1 is smaller than that of the steel core and is easily deformed, and the aluminum wire is located on the outer layer of the steel core. In the case of forming a double drum shape after pressing, a large relative displacement is formed between the steel core and the aluminum strand after the steel anchor 2 of the tension clamp and the aluminum tube 3 of the tension clamp are crimped to the wire 1, and at the same time due to the relative position relationship, the outer layer aluminum wire and the inner layer aluminum wire will also form a relatively large relative displacement, and the relative displacement will accumulate at the mouth of the tension wire clamp tube, which will easily cause loose strands of the wire at the outlet of the tension wire clamp aluminum tube, which will affect On to the build quality.

Contents of the invention

In view of the above-mentioned defects in the prior art, the purpose of the present invention is to provide a method for connecting wires with a hydraulic tension clamp, which can reduce the loose strands of the wires when the tension clamp is crimped, and improve the quality of hydraulic construction. The invention provides a method for connecting wires with hydraulic tension clamps. The tension clamps include aluminum tubes for tension clamps and steel anchors for tension clamps. The method for connecting wires with hydraulic tension clamps The steps are:

(1) Strip a section of the outer stranded wire at the wire connection end to expose the inner core;

(2) Set the steel anchor of the tension clamp on the outer side of the inner core after stripping the outer stranded wire at the wire connection end;

(3) The inner core after the steel anchor crimping wire of the tension wire clip is stripped of the outer stranded wire;

(4) Arranging the aluminum tube of the strain clamp on the outside of the wire and the steel anchor of the strain clamp;

(5) The aluminum tube of the strain clamp is crimped sequentially from the non-connecting end side of the wire to the middle, skipping the non-pressing area and pressing it to the connecting end side of the wire.

In the first preferred technical solution provided by the present invention: in the above step (1), the length of the outer stranded wire stripped from the connecting end of the wire is the length of the crimping part of the tension clamp steel anchor, and the elongation of the steel pipe during crimping. amount, the relative displacement of the inner core and the outer stranded wire during crimping, and the sum of the gap, and the gap is 8-12 mm.

In the second preferred technical solution provided by the present invention: the above step (2) further includes: the aluminum tube of the tension clamp is arranged outside the non-connecting end of the wire, and a part of the inner core of the wire exposes the nozzle of the steel anchor of the tension clamp.

In the third preferred technical solution provided by the present invention: the sequence of applying pressure to the inner core by crimping the steel anchor of the tension clamp steel anchor in the above step (3) is: from the pull ring side pipe of the steel anchor clamp of the tension clamp The mouth side is sequentially crimped.

In the fourth preferred technical solution provided by the present invention: the aluminum tube of the strain clamp described in the above step (4) is arranged on the outside of the wire and the steel anchor of the strain clamp, specifically: the aluminum tube of the strain clamp is arranged on the At the pull ring of the steel anchor of the tension clamp, move the aluminum tube of the tension clamp to the direction away from the pull ring for a certain length.

In the fifth preferred technical solution provided by the present invention: the tension aluminum tube moves away from the pull ring for a length equal to the crimp elongation of the tension clamp aluminum tube.

Description of drawings

Figure 1 is a sequence diagram of the pressure application of the traditional strain-clamp aluminum tube;

Fig. 2 is: a structural schematic diagram of a crimping die;

Fig. 3 is: the method flowchart of Embodiment 1 of a method for connecting wires with a hydraulic tension clamp provided by the present invention;

Fig. 4 is a schematic diagram of stripping the outer aluminum stranded wire from the aluminum steel core stranded wire provided by the present invention;

Fig. 5 is: the sketch map that steel anchor of strain clamp provided by the present invention penetrates;

Fig. 6 is a sequence diagram of the pressure application of the tension clamp steel anchor provided by the present invention;

Figure 7 is a schematic diagram of the penetration of the aluminum tube of the tension clamp provided by the present invention;

Fig. 8 is a diagram of the pressure application sequence of the tension clamp aluminum tube provided by the present invention.

In the figure: 1. Conductor 2. Steel anchor for tension wire clamp 3. Aluminum tube for tension wire clamp 4. Crimping die 5. Tension resistant aluminum tube or steel anchor 6. Conductor or steel core 7. Binding wire , Pressure serial number.

Detailed ways

The invention provides a method for a hydraulic tension clamp, the hydraulic equipment used includes a hydraulic pump station, a crimping pliers head, and a crimping die, and the crimping die consists of upper and lower halves of a structure with a regular hexagonal cross section Part, its specific structure is shown in Figure 2. The crimping die 4 crimps the tensile aluminum tube or steel anchor 5 with a circular cross-section into a structure with a regular hexagonal cross-section. In a method for connecting wires provided by a hydraulic tension clamp provided by the present invention, the tension clamp includes an aluminum tube for the tension clamp and a steel anchor for the tension clamp, and the aluminum tube for the tension clamp is used for twisting with the outer side of the conductor For partial connection, the steel anchor of the tension clamp is used to connect with the inner core of the wire. The specific method steps are:

S101, strip off a section of the outer stranded wire at the connection end of the wire to expose the inner core;

S102, setting the steel anchor of the tension clamp on the outer side of the inner core after stripping the outer stranded wire at the wire connection end;

S103, the inner core after stripping the outer stranded wire of the steel anchor crimped wire with tension clamp;

S104, arranging the aluminum tube of the tension clamp on the outside of the wire and the steel anchor of the tension clamp;

S105, the aluminum tube of the strain clamp is crimped sequentially from the non-connecting end side of the wire to the middle, skipping the non-pressing area and pressing to the connecting end side of the wire.

The method for connecting wires with a hydraulic tension clamp provided by the present invention can be used for transmission line steel-cored aluminum stranded wire, aluminum-clad aluminum stranded wire, aluminum-clad invar-cored aluminum alloy stranded wire, steel-cored aluminum alloy stranded wire, It is also suitable for the crimping of various overhead stranded wires such as aluminum alloy stranded wires and carbon fiber composite core conductors, and is also suitable for overhead stranded wires of the same material as aluminum stranded wires, aluminum alloy stranded wires, steel stranded wires, and aluminum-clad steel stranded wires. Conductor and ground wire strain clamp crimping.

Embodiment one:

Embodiment 1 of a method for connecting wires with a hydraulic tension clamp provided by the present invention is a method for connecting a steel-cored aluminum stranded wire with a hydraulic tension clamp. The outer stranded wire of the aluminum stranded wire is an aluminum stranded wire, and the inner core is a steel core. The connection method flow chart is shown in Figure 3, and the specific steps are as follows:

Step S301, stripping off a section of aluminum stranded wire at the connection end of the aluminum stranded wire to expose the steel core.

The schematic diagram of stripping the aluminum wire from the wire is shown in Figure 4. Measure a certain length L from the connecting end of the wire 1 inward, tie the wire 1 firmly with the binding wire 7, and cut off the aluminum stranded wire at the measured length L to expose the wire 1 The length of the interior is a steel core of length L measured. Measure the length L specifically as:

The measured length L = the length of the crimping part of the steel anchor of the tension clamp + the elongation of the steel pipe during crimping + the relative displacement of the steel core and the aluminum wire when crimping the aluminum tube during crimping + the amount of space, of which the amount of space is generally is 10mm.

Step S302, setting the steel anchor of the tension clamp on the outer side of the steel core after stripping the aluminum stranded wire at the connecting end of the wire.

The schematic diagram of the penetration of the tension clamp steel anchor is shown in Figure 5. It can be seen from Figure 5 that the tension clamp steel anchor 2 is penetrated to the outside of the steel core after the aluminum strand is stripped off at the connection end of the conductor 1, and the tension wire The clamping aluminum tube 3 penetrates the outside of the non-connecting end of the wire 1, and a part of the steel core of the wire 1 exposes the nozzle of the tension wire clamp steel anchor 2.

In step S303, the steel anchor of the tension clamp is crimped to the steel core after the aluminum stranded wire is stripped.

The pressure sequence diagram of the tension clamp steel anchor is shown in Figure 6. From Figure 6, it can be seen that the steel core of the tension clamp steel anchor 2 is crimped to the wire 1 from the side of the pull ring of the tension clamp steel anchor 2. The nozzle side is sequentially crimped.

Step S304, disposing the aluminum tube of the tension clamp on the outer side of the wire and the steel anchor of the tension clamp.

The schematic diagram of the penetration of the tension clamp aluminum tube is shown in Figure 7. It can be seen from Figure 7 that after the tension clamp steel anchor 2 is crimped, the tension clamp aluminum tube 3 is inserted at the limit position (i.e. At the pull ring of the tension wire clamp steel anchor 2) as shown in Figure 7 (a), then move the tension wire clamp aluminum tube 3 to a direction away from the pull ring for a length L1, as shown in Figure 7 (b) Show. Among them, L1 is the crimping elongation of the reserved aluminum tube when crimping the aluminum tube.

Step S305, crimping the aluminum tube of the strain clamp from the side of the non-connecting end of the wire to the middle in sequence, skipping the non-pressing zone and pressing it to the side of the connecting end of the wire.

The pressure sequence of the aluminum tube of the tension clamp is shown in Figure 8. The first molding is at the outlet of the aluminum tube at the tip of the aluminum tube of the tension clamp, and it is crimped from the side of the non-connecting end of the wire to the side of the connecting end. After the crimping of the groove of the clamp steel anchor is completed, other methods must be used to check whether the groove of the tension wire clamp steel anchor is completely pressed by the aluminum tube.

The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the specific implementation of the present invention can still be carried out. Any modification or equivalent replacement without departing from the spirit and scope of the present invention shall fall within the scope of the claims of the present invention.

Claims (6)

1. a hydraulic strain clamp connects the method for lead, and said strain clamp comprises strain clamp aluminum pipe and strain clamp steel anchor, it is characterized in that, the method for said hydraulic strain clamp connection lead comprises the steps:

(1) divests one section of wire connecting ends outside twisted wire, expose inner core;

(2) strain clamp steel anchor is arranged on the inner core outside after wire connecting ends divests outside twisted wire;

(3) inner core outside strain clamp steel anchor crimping lead divests behind the twisted wire;

(4) the strain clamp aluminum pipe is arranged on the outside of lead and strain clamp steel anchor;

(5) the strain clamp aluminum pipe is from the middle part crimping successively of lead front of motor side direction, and skipping not, nip is depressed into the wire connecting ends side always.

2. the method that connects lead according to a kind of hydraulic strain clamp of claim 1; The relative shift and the pore volume sum of inner core and the outside twisted wire when steel pipe elongation, crimping when the length that it is characterized in that divesting in the above-mentioned steps (1) the said outside twisted wire of said wire connecting ends is the pressure contact portion bit length of strain clamp steel anchor, crimping, said pore volume is the 8-12 millimeter.

3. connect the method for lead according to a kind of hydraulic strain clamp of claim 1, it is characterized in that above-mentioned steps (2) also comprises: the strain clamp aluminum pipe is arranged on the outside of lead front of motor, and the part of lead inner core is exposed the mouth of pipe of strain clamp steel anchor.

4. the method that connects lead according to a kind of hydraulic strain clamp of claim 1 is characterized in that the order of exerting pressure of the said inner core of strain clamp steel anchor crimping described in the above-mentioned steps (3) is: from the draw ring side direction mouth of pipe side crimping successively of strain clamp steel anchor.

5. the method that connects lead according to a kind of hydraulic strain clamp of claim 1; It is characterized in that the outside that strain clamp aluminum pipe described in the above-mentioned steps (4) is arranged on lead and strain clamp steel anchor is specially: the strain clamp aluminum pipe is arranged on the draw ring place of strain clamp steel anchor, the strain clamp aluminum pipe is moved a segment length to the direction of leaving said draw ring.

6. the method that connects according to a kind of hydraulic strain clamp of claim 5 is characterized in that said strain insulator aluminum pipe moves the crimping elongation that a segment length is said strain clamp aluminum pipe to the direction of leaving said draw ring.

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