RU2576057C2 - Mandrel of device for continuous manufacturing of non-metal pipes - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: mandrel includes sectors making the work surface of the mandrel, being shape-generating internal cylindrical surface of non-metal pipe. Sectors are installed with possibility of movement along the axis of rotation of the mandrel. The mandrel contains four modules, each of them comprises two coaxially installed rings with same diameter, to external surface of each ring two mandrel sectors are rigidly secured, they are uniformly located on the external surface of rings. Rings of all modules creating the mandrel are installed coaxially with the axis of rotation of the mandrel. External surface of rings contains at least two shoulders to which sectors abut.

EFFECT: reduced weight, simple design of mandrel.

2 cl, 6 dwg, 1 tbl

Description

Application area

The invention relates to mandrels of devices for the continuous manufacture of non-metallic pipes by winding long fiberglass material with a binder on a mandrel, followed by curing of the binder.

The invention can be used in the production of non-metallic pipes of large or small cross-section from reinforced polymers (fiberglass).

State of the art

Known installations for the continuous manufacture of non-metallic pipes by winding a long fiberglass material with a binder on a mandrel with subsequent curing of the binder, see patents Nos. SU 234650, SU 378327, SU 729077, SU 994276, SU 1388310, RU 2209731, RU 2236350 and UA 9498.

The prototype of the proposed invention is the mandrel of the device for the continuous manufacture of non-metallic pipes according to patent No. RU 2334617, consisting of sectors forming the working surface of the said mandrel, which is the forming internal cylindrical surface of the non-metallic pipe, while these sectors are mounted with the possibility of movement along the axis of rotation of the mandrel.

A design feature of the known technical solution is that the mandrel sectors contain support elements made in the form of plates.

The disadvantages of the known technical solutions are:

- a large weight of the mandrel, which leads to high material-intensive costs, as well as to energy costs associated with the heating of the mandrel. Also, the large weight of the mandrel leads to the fact that the shell of the preform of a non-metallic pipe, which comes off the free end of the mandrel, is deformed in the area of the support of the free end of the mandrel, which leads to a deterioration in the quality parameters of the manufactured non-metallic pipe;

- the complexity and high labor costs for the manufacture of the mandrel;

- the complexity of installation and dismantling of the mandrel.

The essence of the invention

The objective of the proposed invention is to reduce the weight of the mandrel of the device for the continuous manufacture of non-metallic pipes.

Another objective of the proposed invention is to simplify the design of the mandrel.

Other objectives and advantages of the claimed invention will be discussed below as the presentation of the present description and drawings.

Thus, a mandrel of a device for the continuous production of non-metallic pipes is known, consisting of sectors forming the working surface of said mandrel, which is the forming internal cylindrical surface of a non-metallic pipe, while these sectors are mounted to move along the axis of rotation of the mandrel, according to the claimed invention, the mandrel consists of at least four modules, each of which consists of at least two coaxially mounted rings of the same diameter, to the outer the surfaces of each of which at least two mandrel sectors are rigidly attached, which are uniformly located on the outer surface of the rings, while the rings of all the modules forming the mandrel are aligned with the axis of rotation of the mandrel, and the outer surface of the rings contains at least two protrusions adjacent to sectors.

Also, according to the proposed invention, in which the rings in each module are arranged with the same pitch along the entire length of the module sectors, which ensures uniform distribution of the weight and rigidity of the mandrel along its entire length.

When considering embodiments of the present invention, narrow terminology is used. However, the present invention is not limited to the accepted terms and it should be borne in mind that each such term covers all equivalent elements that work in a similar way and are used to solve the same problems.

The present invention is depicted in the following figures:

Figure 1 - shows a device for the continuous manufacture of non-metallic pipes.

Figure 2 - shows the mandrel of the device for the continuous manufacture of non-metal pipes shown in figure 1, according to the claimed invention.

Figure 3 - shows a view aa of figure 1.

Figure 4 - shows the mandrel depicted in figure 2 with a breakout.

Figure 5 - shows the module of the mandrel shown in figure 2.

6 - shows the mandrel (figure 2) with offset sectors along the axis of rotation of the mandrel.

Implementation example

In Fig.1 shows a device for the continuous manufacture of non-metallic pipes, which contains the main drive 1, the mandrel 2, means for laying 3 of long fiberglass material and a binder on the mandrel 2, polymerization chambers 4. Also figure 1 shows a non-metallic pipe 5 and a cutting device 6.

In figures 2-4 shows the mandrel 2, which contains sixteen sectors 7, forming the working surface of the mandrel 2, which is the forming internal cylindrical surface of the non-metallic pipe 5.

The mandrel 2 consists of four modules 8, each of which consists of rings 9, which contain four projections 10 on the outer surface, each sector adjoins one sector 7. Moreover, the sectors 7 of the mandrel 2 are mounted with the possibility of movement along the axis of rotation O of the mandrel 2 (see FIG. 6).

For clarity, understanding the essence of the proposed invention in figures 2-6, one of the four modules 8 of the mandrel 2 is specially highlighted.

The mandrel 2 device for the continuous manufacture of non-metallic pipes 5 works as follows, namely: through the main drive 1 (Fig. 1) comes into operation mandrel 2 (Fig. 2), which rotates around its axis of rotation O (Fig. 2) with simultaneous movement of sectors 7 along the axis of rotation O of the mandrel 2 (Fig. 6). Typically, the movement of sectors 7 along the axis of rotation O of the mandrel 2 is carried out using a copier (not shown in the figures).

During the operation of the mandrel 2 by means of laying 3 on the outer working surface of the mandrel 2, a protective or sealing layer is wound, after which a long fiberglass material with a binder is wound on the mandrel 2 and as a result a shell of a non-metallic pipe 5 is formed. the pipes 5 maintain the necessary temperature of the mandrel 2, which depends on the temperature properties of the binder.

The descent of the formed shell of the continuous pipe 5 from the mandrel 2 is due to the movement of sectors 7 along the axis of rotation O of the mandrel 2 (Fig. 6). Moreover, at any time considered, 3/4 of the sectors 7 moves in the direction of supply of the moldable shell of the non-metallic pipe 5, and 1/3 of the sectors 7 returns in the opposite direction with increased speed to ensure uniform descent from the mandrel 2 of the shell of the non-metallic pipe 5. Due to the uniform arrangement sectors 7 on the outer surface of the rings 9 provides an effective descent of the shell of a non-metallic pipe 5 from the mandrel 2, and due to the use on the outer surface of the rings 9 of the protrusions 10 of the sector 7 is not They are used with rings 9 of other modules 8 of the mandrel 2, which leads to a decrease in the weight of the mandrel 2, the cost of its manufacture and a decrease in its wear, and also allows to take into account the thermal expansion of the mandrel 2 during its operation.

The curing of the binder shell of the continuous pipe 5 takes place in the polymerization chambers 4. After the curing of the binder using a cutting device 6, the non-metallic pipe 5 is cut and as a result, the non-metallic pipe 5 of a given length is obtained.

Table No. 1 shows the weight of the mandrel 2, according to the proposed invention.

Table number 1 Diameter of mandrel, mm Mandrel length, mm The weight of the mandrel according to the proposed invention, kg 200 4600 425 250 4600 695 300 4600 760

You should also pay attention to the fact that the proposed design of the mandrel allows for quick and convenient installation and dismantling of the mandrel at the installation of continuous manufacture of non-metallic pipes.

Also, the proposed design of the mandrel is easy to manufacture.

It is clear that the above presents one possible example of the implementation of the claimed invention. The invention is not limited to the presented implementation example. So, for example, it is obvious that the outer surface of the rings of the module can be made in the form of a regular polyhedron containing at least eight faces, which ensures uniform distribution of at least two segments on the outer surface of the ring.

Technical result

The technical result of the proposed invention is to simplify the design of the mandrel, as well as reducing its weight.

Claims (2)

1. The mandrel of the device for the continuous manufacture of non-metallic pipes, consisting of sectors forming the working surface of the said mandrel, which is the forming internal cylindrical surface of the non-metallic pipe, while these sectors are mounted to move along the axis of rotation of the mandrel, characterized in that the mandrel consists of at least four modules, each of which consists of at least two coaxially mounted rings of the same diameter, to the outer surface of each of At least two sectors of the mandrel are rigidly attached, which are uniformly located on the outer surface of the rings, while the rings of all modules forming the mandrel are aligned with the axis of rotation of the mandrel, and the outer surface of the rings contains at least two protrusions adjacent to the sectors. 2. The mandrel according to claim 1, in which the rings in each module are arranged with the same pitch along the entire length of the sectors of the module.

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