CN211203257U - Hot melt butt joint wrapping structure of continuous glass fiber reinforced composite pipe - Google Patents

Abstract

The utility model belongs to the technical field of composite pipe joints, in particular to a hot-melt butt wrapping structure of a continuous glass fiber reinforced composite pipe. It includes a double-step interface disposed at the butt joint of the pipe mouth, wherein the double-step interface includes a wrapping groove disposed on the outer layer of the composite pipe, a wrapping surface of the continuous glass fiber reinforced layer, and a heat exchanger disposed on the inner layer of the composite pipe. In the melting section, a wrapping layer composed of continuous glass fiber prepreg tape hot-melt laying is disposed on the wrapping groove and wrapping surface, and a wrapping layer made of plastic is disposed on the outside of the wrapping layer. The novel hot-melt butt wrapping structure has the characteristics of high interface structure strength, strong sealing performance and simple connection operation.

Description

A hot-melt butt wrapping structure of continuous glass fiber reinforced composite pipe

technical field

The utility model belongs to the technical field of composite pipe joints, in particular to a hot-melt butt wrapping structure of a continuous glass fiber reinforced composite pipe.

Background technique

The composite pipe is a pipe with a central interlayer. The central interlayer has a variety of options according to different application scenarios of the pipe. Among them, the continuous glass fiber reinforced thermoplastic pipe is added in the pipe wall. The reinforcement composed of continuous glass fiber prepreg tape winding The core layer increases the structural strength of the composite pipeline, so that the flexible pipeline can withstand high pressure transmission medium. The direction of pipeline development.

However, due to the many layers of the composite pipe wall and the complex structure, the inner and outer layers are made of plastic or rubber, the overall hardness is relatively high, the diameter is relatively large, and the sealing and compression performance of the joint is high, which makes the nozzle connection interface a difficult point of processing. Therefore, the continuous fiber reinforced plastic composite pipes currently on the market generally use pure plastic pipe fittings or metal pipe fittings for their interface fittings, which cannot meet the high pressure requirements of the pipeline system and are relatively expensive.

Utility model content

The purpose of the utility model is to provide a hot-melt butt-wrapping structure of a continuous glass fiber reinforced composite pipe with high interface structure strength, strong sealing performance and simple connection operation.

To achieve the above object, the technical scheme adopted by the present utility model is:

A hot-melt butt wrapping structure of a continuous glass fiber reinforced composite pipe, characterized in that it comprises a double-step interface arranged at the mouth of the pipe, wherein the double-step interface comprises a wrapping groove arranged on the outer layer of the composite pipe , the wrapping surface of the continuous glass fiber reinforced layer and the hot-melt section arranged on the inner layer of the composite pipe, the wrapping groove and the wrapping surface are provided with a wrapping layer composed of continuous glass fiber prepreg tape hot-melt laying. The outer part of the wrapping layer is provided with a cladding layer made of plastic.

The additional technical features of the hot-melt butt wrapping structure constituting the above-mentioned continuous glass fiber reinforced composite pipe also include:

- The included angle between the wrapping groove and the axial direction of the composite tube is 20 to 30 degrees, and the included angle between the coating layer and the axial direction of the composite tube is 10 to 15 degrees.

- The length of the wrapping surface of the continuous glass fiber reinforced layer is between 400 and 800 mm, and the length of the hot-melt section arranged in the inner layer of the composite pipe is between 2 and 2.5 mm.

- A reinforcing layer formed by winding metal wires or metal strips is arranged between the winding layer and the cladding layer in the double-step interface.

Compared with the prior art, the hot-melt butt-wrapped structure of the continuous glass fiber reinforced composite pipe provided by the utility model has the following advantages: because the hot-melt butt-wrapped structure of the composite pipe comprises a The double-step interface is composed of a wrapping groove set on the outer layer of the composite pipe, a wrapping surface of the continuous glass fiber reinforced layer, and a hot-melt section set on the inner layer of the composite tube. The joint orifice of the composite tube is simple to process. The processing operation is fast, and it is convenient for hot-melt connection. The winding layer composed of continuous glass fiber prepreg tape is arranged on the winding groove and the winding surface, and the coating layer composed of plastic is arranged on the outside of the winding layer. The double-layer structure improves the connection strength at the interface, the pressure bearing capacity is strong, and the sealing effect is outstanding, and for the joint connection of the continuous glass fiber reinforced composite pipe, the consistency of the overall pipeline system is guaranteed, and the safety performance is greatly enhanced.

Description of drawings

Fig. 1 is a schematic diagram of a hot-melt butt-wrapping structure of a continuous glass fiber reinforced composite pipe of the present invention.

Detailed ways

The hot-melt butt wrapping structure and working principle of a continuous glass fiber reinforced composite pipe provided by the present utility model will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 , it is a schematic diagram of a hot-melt butt wrapping structure of a continuous glass fiber reinforced composite pipe provided by the present invention. The novel hot-melt butt wrapping structure includes a double-step interface arranged at the nozzle, and the double-step interface includes a wrapping groove 11 arranged on the outer layer 1 of the composite pipe, a wrapping surface 21 of the continuous glass fiber reinforced layer 2, and a wrapping surface 21 arranged on the outer layer 1 of the composite pipe. In the hot-melt section 31 of the inner layer 3 of the composite pipe, a wrapping layer 4 composed of continuous glass fiber prepreg tapes is provided on the wrapping groove 11 and the wrapping surface 21 by hot-melting and laying, and the exterior of the wrapping layer 4 is provided with plastics. cladding layer 5.

Its working principle is: the butt joint of the continuous glass fiber prepreg tape reinforced core layer high-pressure composite pipe is machined into a double-step structure, including the wrapping groove 11 arranged on the outer layer of the composite pipe, and the outer layer of the peeling composite pipe is exposed. The wrapping surface 21 of the continuous glass fiber reinforced layer and the hot-melt section 31 arranged in the inner layer 3 of the composite pipe, the hot-melt section 31 of the inner layer pipe is butted by hot-melt, and then cross-wrapped with continuous glass fiber prepreg tape after grinding. The wrapping surface 21 and the surface of the groove 11 are heated while wrapping so that the glass fiber prepreg tape is melted and laid, and then the plastic wrapping layer 5 on the surface is formed into an integrated connection interface.

In the hot-melt butt wrapping structure constituting the above-mentioned continuous glass fiber reinforced composite pipe,

——As a preferred embodiment, the angle a between the above-mentioned wrapping groove 11 and the axial direction of the composite pipe is 20 to 30 degrees, and the angle b between the coating layer and the axial direction of the composite pipe is 10 to 15 degrees, which is convenient for Mechanical processing is also suitable for continuous glass fiber prepreg tapes to be cross-wound to form a firm and tight reinforced skeleton, which ensures the consistency of continuous glass fibers in the composite pipe and improves the connection strength and sealing effect of the composite pipe joints.

——Further, the length of the wrapping surface 21 of the above-mentioned continuous glass fiber reinforced layer 2 is between 400 and 800 mm, and the length of the hot-melt section 31 arranged in the inner layer 3 of the composite pipe is between 2 and 2.5 mm, which not only ensures the The inner layer of the composite pipe is hot-melted and fixed firmly and stably, and provides enough space for the continuous glass fiber prepreg tape to be hot-wrapped, with high structural strength and tight connection.

——Preferably, the reinforcing layer 6 formed by the winding of metal wires or metal tapes is arranged between the winding layer 4 and the cladding layer 5 in the above-mentioned double-step interface, which can further enhance the connection strength at the joint of the composite pipe and improve the composite pipe. Safe and stable operation, extending the service life of the joint pipeline.

Claims (4)

1. a hot-melt butt wrapping structure of continuous glass fiber reinforced composite pipe, it is characterized in that: comprise the double-step interface that is arranged at the butt joint of the nozzle, wherein, the double-step interface comprises the bag that is arranged on the outer layer of the composite pipe. The wrapping groove, the wrapping surface of the continuous glass fiber reinforced layer, and the hot-melt section arranged on the inner layer of the composite pipe, and the wrapping groove and the wrapping surface are provided with a continuous glass fiber prepreg tape. layer, on the outside of the wrapping layer a cladding layer made of plastic is provided. 2. The hot-melt butt wrapping structure of a continuous glass fiber reinforced composite tube according to claim 1, wherein the included angle between the wrapping groove and the axial direction of the composite tube is 20 to 30 degrees, so The included angle between the cladding layer and the axial direction of the composite pipe is 10 to 15 degrees. 3. The hot-melt butt wrapping structure of a continuous glass fiber reinforced composite pipe according to claim 2, characterized in that: the length of the wrapping surface of the continuous glass fiber reinforced layer is between 400 and 800 mm. The length of the hot melt section in the inner layer of the composite pipe is between 2 and 2.5 mm. 4. The hot-melt butt wrapping structure of a continuous glass fiber reinforced composite pipe according to claim 1, characterized in that: between the wrapping layer and the wrapping layer located in the double-step interface, a metal wire or a wrapping layer is provided. Reinforcing layer formed by winding metal tapes.

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