Device for local pipeline repair

FIELD: mechanics.

SUBSTANCE: device consists of a housing with rolls being installed on it, defect detector, element for damaged area sealing, mechanism for the element expansion comprised of a set of hold-down tools, recoil compression spring, front and rear beveled push rods, and expansion mechanism drive. The device is provided with dielectric tube and rings installed coaxially on the housing. The recoil compression spring, front and rear beveled push rods are mounted on the external surface of dielectric tube. The above mentioned front and rear beveled push rods are represented with grooved shell rings for displacing hold-down mechanism. The tubular electric heaters and flexible heat-resistant curtain are fixed to cones along the perimetre. The holders are implemented with spring-loaded extensible legs. The textile sheet made from strong rot-resistant material impregnated with glue compound and wounded on hold-down tools is used as an element for damaged area sealing. The above-mentioned hold-down tools are lined with plates incapable of sticking. The extension mechanism drive is implemented with power spring made from alloy with revertible elastic recovery effect.

EFFECT: simple design, reduced overall dimensions and weight.

4 dwg

 

The invention relates to the equipment for repair work, in particular to devices for repair of pipelines and their protection from the formation of defects.

A device to fix the leak in the pipeline (As of the USSR №653480, IPC F16L 55/18, 1979), including a body on which is mounted the detector leak detection and element, sealing the damaged pipeline with the actuator, whereby the sealing element is designed in the form of a tightly wound on the body of the device, elastic tape, caught on the edges in the wound state of the spring-loaded Belleville washers of magnetic material, and drive the sealing element is designed as a pulse ring of electromagnets placed in the end cavities of the housing and electrically connected with the detector leak detection.

It is also known which is the technical entity closest to the proposed technical solution the device to fix the leak in the pipeline (U.S. Patent for the invention №3642032, IPC F16L 55/18, 1972), including the case and installed the bracket with rollers, the detector defect detection element for sealing the damaged area of the pipe, made in the form of repair of the rings, the extension mechanism of this element, consisting of clamps, return springs, front and rear cone tol is atela, and drive expansion mechanism in the form of a pneumatic system.

The disadvantages of the known devices are incomplete elimination of leakage due to possible gapping to the pipeline elements for sealing the injury, the inability warning defect hardening, as well as the complexity of devices, not enough high technology of its manufacture, relatively large size and weight caused by the use of complex actuator in the form of an electromagnet or a pneumatic system.

The objective of the invention is the complete elimination or prevention of leakage.

The problem is solved in such a way that the device for the local repair of pipelines, including the housing and installed the bracket with rollers, the detector defect detection element for sealing the damaged area of the pipe, the extension mechanism of this element, consisting of clamps, return springs, front and rear cone pushers, and drive the expansion mechanism according to the invention provided with a dielectric tube with rings mounted coaxially on the body, on the outer surfaces of which are return compression spring, front and rear tapered plungers, made in the form of shells with grooves for movement is Ragimov, around the perimeter of the pushers attached tubular heaters (heating elements) and a flexible heat-resistant aprons, holders made in the form of spring-loaded telescopic legs, as an element for sealing the damaged area of pipe used fabric cloth of durable non-decaying material, impregnated with adhesive and wound clamps on that side of the pipeline faced with an unmanageable bonding plates, and drive expansion mechanism made in the form of a power spring of the alloy with the effect of reversible shape memory.

In addition, the length of the fabric panel L (m) is determined by the formula L=π·D·n, where D is the internal pipe diameter, m; n is the number of layers of fabric.

Figure 1 shows a device for the local repair of pipelines (longitudinal section); figure 2 - is a view As in figure 1; figure 3 is a cross-section B-B in figure 1; figure 4 - constructive-technological scheme for the local repair of the pipeline.

A device for the local repair of pipelines (figure 1) includes a housing 1 and installed in the holders with the rollers 2, made in the form of spring-loaded telescopic legs 3, the detector 4 discovery of the defect (Fig 1, 2) in the form of a video camera attached to the housing 1, item 5 for sealing (figure 1) damage to the pipe 6, which used a fabric cloth of PR is knogo non-decaying material (for example, capron), impregnated adhesive (e.g. epoxy resin), the mechanism of the expansion element 5 consisting of clamps 7 holes 8 under the spring 9 (Fig 3), tightening the clamps 7, which side of the pipeline 6 faced with an unmanageable bonding the wafer 10 (e.g., PTFE). The body 1 is installed coaxial dielectric tube 11 ring 12, on the outer surfaces of which are return compression spring 13, the front and rear tapered plungers 14, 15, made in the form of shells with the slots 16. Along the perimeter of the cone of the plungers 14, 15 attached heating element 5 and the area of adhesion to the pipeline of the heating elements 17, 18, and a flexible heat resistant aprons 19, 20 (for example, from Asbo or guledani). Drive expansion mechanism made in the form of force of the spring 21 of the alloy with the effect of reversible shape memory (e.g., Nickel-titanium, Ni-50%Ti-50%), is connected by a cable 22 to a generator 23 (figure 4). Delivery of the claimed device 24 to the location of the defect is carried out by the rope 25, the movable winch 26.

The device operates as follows.

After carrying out of works on the determination of the location and nature of damage of the pipeline 6 (figure 1) using a video camera 4 (Fig 1, 2), and Stripping the surface on the defect device 24 (figure 4) is delivered to the site of repair rope 25, lane is maxemum winch 26 (figure 4). After that is current on the power spring 21 and the heating elements 17, 18 (figure 1) from the generator 23 to the cable 22, the resulting force of the spring 21 from its own electrical resistance begins to warm up to the threshold effect is reversible shape memory and transfer of material in this spring in the austenitic state. However, she begins to recover given the heat treatment of the form, generating a mechanical stress to overcome the resistance of springs 9 and 13 (1, 3) and thereby to compress the tapered plungers 14 and 15, and permits the extrusion of a set of clamps 7 plates 10 to the walls of the pipe 6 and is clamped thereto with a given force fabric panels 5, impregnated adhesive composition. Moreover, the presence of the heaters 17, 18 and aprons 19, 20 provides heating element 5 and place bonding, reduces heat loss and reduces curing time of the adhesive with one or more days, depending on air temperature in the pipeline, up to 1-2 hours. After the required exposure time is pressed against the defect of the coating material the current is turned off, the power spring 21 ceases to develop working voltage, springs 9 and 13 return conical plungers 14 and 15 in the initial state. Further, the device is removed from the pipeline.

The proposed device provides a complete elimination or prevention Ute is key, as well as simplifying its design, improving manufacturability, reduced size and weight.

A device for the local repair of pipelines, including the housing and installed the bracket with rollers, the detector defect detection element for sealing the damaged area of the pipe, the extension mechanism of this element, consisting of clamps, return springs, front and rear cone pushers, and drive the expansion mechanism, characterized in that the device has a dielectric tube with rings mounted coaxially on the body, on the outer surfaces of which are return compression spring, front and rear tapered plungers, made in the form of shells with grooves for movement of the clamps along the perimeter of the cones attached tubular heaters and flexible heat resistant aprons, holders made in the form of spring-loaded telescopic legs, as an element for sealing the damaged area of pipe used fabric cloth of durable non-decaying material, impregnated with adhesive and wound clamps on that side of the pipe lined with refractory bonding plates, and drive expansion mechanism made in the form of a power spring of the alloy to effect reversible p is Mati form.



 

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