RU115034U1 - SQUARE OR RECTANGULAR PIPE, PREFERREDLY FROM SHEET ROLL MATERIAL - Google Patents

Abstract

1. A pipe of square or rectangular cross-section, predominantly of sheet roll material, containing at least one wall, characterized in that the pipe is made of square or rectangular cross-section by bending from steel sheet or tape, contains upper and lower shelves and two said side walls , moreover, on one of the mentioned walls there are two bendings of equal height, mated to each other, to form a longitudinal said protrusion directed towards the inside of the pipe, while one said bend is made by the side of the steel sheet or tape emanating from the upper shelf, directed parallel to the wall upward with the formation of a directed upward of the longitudinal channel made between its sides, and the second mentioned bend is made by the side of the steel sheet or tape emanating from the said lower shelf, and is directed parallel to the wall downward with the formation of a downward longitudinal channel made between its sides, and the side of the steel sheet or flax you of the mentioned bend directed downward is installed in the said longitudinal channel of the bend directed upward, tightly adhering to it, and the side of the steel sheet or tape of the said bend directed upward is installed in the said longitudinal channel of the bend directed downward, tightly adjacent to it, with the formation of a closed connection of the lock type, made in the form of "Lying Fold". ! 2. A pipe of square or rectangular cross-section, predominantly of sheet roll material according to claim 1, characterized in that the said two bends, mated to each other, equal in height, forming a longitudinal protrusion and closed

Description

A pipe of square or rectangular cross section, mainly made of sheet web material.

The proposed technical solution of the utility model relates to the production of metal structures for a greenhouse with power structures from bent metal pipes having a closed cross section, as well as for the manufacture of other metal structures.

Of the analogues of the prior art, the closest technical solution to the technical solution of the proposed utility model is a pipe, mainly of sheet roll material, containing at least one wall (RS N529335, MKI F16L 9/02 application for invention No. 2023544/08 of 12.05 .1974, authors: Kochanov V.G., Beilin D.Kh., Delins P.A., applicant: Latvian Research Institute of Hydrotechnics and Land Reclamation, published in Bulletin No. 35 of December 16, 1976).

The disadvantages of the prototype solution are:

1. Less strength, rigidity and durability of the structure and the reliability of its connection when receiving the pipe.

2. The complexity of the technology of manufacturing pipes from sheet roll material.

The technical result is an increase in strength, rigidity and durability of the structure and the reliability of its connection when receiving the pipe, as well as simplification of the manufacturing technology of the pipe in comparison with the invention adopted as a prototype, a pipe, mainly from a sheet of rolled material containing at least one wall, The claimed utility model is achieved in that the pipe is made of square or rectangular cross-section by bending from a steel sheet or tape containing the upper and lower shelves and two side walls mentioned ki, moreover, on one of the said walls there are two bends of equal height, paired with each other, with the formation of a longitudinal said protrusion directed into the inside of the pipe, wherein one said bend is made by the side of the steel sheet or strip emanating from the upper shelf parallel to the wall upwards, with the formation directed to the top of the longitudinal channel made between its sides, and the second mentioned bending is made by the side of the steel sheet or tape coming from the said lower shelf and parallel but the walls are downward, with the formation of a downwardly directed longitudinal channel made between its sides, the side of the steel sheet or strip of said bending directed downwardly installed in said longitudinal bending channel directed to the top, lying close to it, and the side of the steel sheet or tape of said bending directed the top is installed in the aforementioned longitudinal bending channel directed downward, fitting tightly to it, with the formation of a closed connection such as a lock made in the form of a “Laying Seam”.

It is advisable that the above-mentioned two bends of equal height, forming a longitudinal protrusion and a closed connection of the lock type, made in the form of a “Recumbent Seam", are directed into the inside of the pipe and located on the wall in its middle part.

It is preferable that the above-mentioned two bends of equal height, forming a longitudinal protrusion and a closed connection of the lock type, made in the form of a “Recumbent Seam", are directed into the inside of the pipe and are located on the wall in its upper part.

It is advisable that the above-mentioned two bends of equal height, forming a longitudinal protrusion and a closed connection of the lock type, made in the form of a “Recumbent Seam", are directed inside the pipe and are located on the wall in its lower part.

It is preferable that the above-mentioned two bends of equal height, which form a longitudinal protrusion and a closed connection of the lock type, made in the form of a “Recumbent Seam", are directed outside the pipe and located on the wall in its middle part.

It is advisable that the above-mentioned two bends of equal height, forming a longitudinal protrusion and a closed connection of the lock type, made in the form of a “Recumbent Seam", are directed outside the pipe and are located on the wall in its upper part.

It is preferable that the above-mentioned two bends of equal height, which form a longitudinal protrusion and a closed lock-type connection made in the form of a “Recumbent Seam", are directed outside the pipe and are located on the wall in its lower part.

It is advisable that on one of the said shelves on its inner side there are two bends of equal height, paired with each other, with the formation of a longitudinal protrusion directed into the inside of the pipe, while one said bend is made by the side of the steel sheet or strip emanating from the left mentioned wall parallel shelves to the left, with the formation of a longitudinal channel directed to the left, made between its sides, and the second mentioned bend is made by the side of a steel sheet or tape, coming from the right wall and is directed parallel to the shelf to the right, with the formation of a right-directed longitudinal channel made between its sides, with the side of the steel sheet or tape of the said bending directed to the right installed in the said longitudinal bending channel directed to the left, lying snug against it, and the side of the steel sheet or tape said bending directed to the left is installed in the said longitudinal bending channel directed to the right, fitting tightly to it, with the formation of the said closed connection type z IOC, in the form of "speed welts."

It is preferable that the above-mentioned two bends of equal height, forming a longitudinal protrusion and a closed connection of the lock type, made in the form of a “Recumbent Seam", are directed into the inside of the pipe and located on a shelf in its left part.

It is advisable that the above-mentioned two bends of equal height, forming a longitudinal protrusion and a closed lock-type connection made in the form of a “Recumbent Seam", are directed into the inside of the pipe and located on a shelf in its middle part.

It is preferable that the above-mentioned two bends of equal height, which form a longitudinal protrusion and a closed lock-type connection made in the form of a “Recumbent Seam", are directed into the inside of the pipe and are located on a shelf in its right part.

It is advisable that the above-mentioned two bends of equal height equal to each other, forming a longitudinal protrusion and a closed lock-type connection made in the form of a “Recumbent Seam", are directed outside the pipe and located on a shelf in its middle part.

It is preferable that the above-mentioned two bends of equal height, forming a longitudinal protrusion and a closed connection of the lock type, made in the form of a “Recumbent Seam", are directed outside the pipe and are located on a shelf in its left part.

It is advisable that the above-mentioned two bends of equal height equal to each other, forming a longitudinal protrusion and a closed lock-type connection made in the form of a “Recumbent Seam", are directed outside the pipe and are located on a shelf in its right part.

The technical result is an increase in the strength, rigidity and durability of the structure and the reliability of its connection in the manufacture of pipes in the claimed utility model in comparison with the technical solution adopted for the prototype is achieved as follows.

In the technical solution adopted for the prototype, the pipe during manufacture is rolled up so that the surfaces and faces are in contact with each other, and the recesses located on the longitudinal edges of the sheet material are combined. Such a connection is less strong, stiff and durable in comparison with the technical solution made in the claimed utility model.

In the claimed utility model, a pipe made by bending a square or rectangular section, mainly from a steel sheet or tape, has two conjugate equal in height bends, forming a longitudinal protrusion directed outward of the pipe and a closed connection such as a lock, made in the form of "Lying Seam ". Such a closed pipe connection in the claimed utility model provides an increase in the strength, rigidity and durability of the structure and the reliability of its connection when receiving the pipe, compared with the technical solution in the invention adopted as a prototype.

In the invention adopted as a prototype in the technology of manufacturing pipes from sheet roll material, alternating staggered recesses and protrusions in the shape of a wafer are performed. Then, on the surface of the sheet material in the area of the recesses (on the side surfaces and bottom parts), perforation is performed, the recesses are filled with reinforcing material, for example concrete, or filtering, working in compression, for example poroelast, and then the sheet material is rolled so that the surfaces and faces contact each other with the other, and the recesses located on the longitudinal edges were combined.

In the claimed utility model, the manufacturing technology of the pipe is simpler, since a pipe of square or rectangular cross section, mainly from sheet rolled material, is made by bending on one special equipment from a special tape or sheet in several transitions.

The pipe is obtained by bending square and rectangular sections, which is not possible to obtain on the equipment in the technical solution adopted for the prototype.

The utility model is illustrated by drawings, which depict:

Figure 1. A square tube, mainly made of sheet roll material, a longitudinal protrusion of which, forming a closed connection such as a lock, made in the form of a “Reclining Seam", is directed inside the pipe and is located on the wall in its middle part.

Figure 2. A square tube, mainly from sheet roll material, a longitudinal protrusion of which, forming a closed connection such as a lock, made in the form of a “Recessed fold”, is directed into the pipe and is located on the wall in its upper part.

Figure 3. A part of a pipe of rectangular cross section, mainly from sheet roll material, a longitudinal protrusion of which, forming a closed connection such as a lock, made in the form of a “Laying Seam”, is directed inside the pipe and is located on the wall in its middle part (front side view).

Figure 4. The pipe is of rectangular cross section, mainly of sheet roll material, the longitudinal protrusion of which, forming a closed connection of the lock type, made in the form of a “Lay Folding”, is directed into the pipe and is located on the wall in its middle part.

Figure 5. A square tube, mainly made of sheet roll material, a longitudinal protrusion of which, forming a closed connection such as a lock made in the form of a “Reclining Seam", is directed outside the pipe and is located on the wall in its upper part.

6. A square tube, mainly made of sheet roll material, a longitudinal protrusion of which, forming a closed connection such as a lock made in the form of a “Recessed Seam", is directed outside the pipe and is located on the wall in its middle part.

7. The pipe is of rectangular cross section, mainly of sheet rolled material, the longitudinal protrusion of which, forming a closed connection such as a lock, made in the form of a “Lay Folding”, is directed outside the pipe and is located on the wall in its upper part.

Fig. 8. A square tube, mainly made of sheet roll material, the longitudinal protrusion of which, forming a closed connection such as a lock, made in the form of a “Reclining Seam", is directed inside the pipe and is located on a shelf in its right part.

Fig.9. A square tube, mainly made of sheet roll material, the longitudinal protrusion of which, forming a closed connection such as a lock, made in the form of a “Reclining Seam", is directed inside the pipe and is located on a shelf in its middle part.

Figure 10. A square tube, mainly made of sheet roll material, a longitudinal protrusion of which, forming a closed connection such as a lock made in the form of a “Reclining Seam", is directed outside the pipe and is located on a shelf in its right part.

11. A square tube, mainly made of sheet roll material, the longitudinal protrusion of which, forming a closed connection such as a lock, made in the form of a “Reclining Seam", is directed outside the pipe and is located on a shelf in its middle part.

Fig. 12. The pipe is of rectangular cross section, mainly of sheet roll material, the longitudinal protrusion of which, forming a closed connection such as a lock, made in the form of a “Lay Folding”, is directed into the pipe and is located on a shelf in its right part.

Fig.13. The pipe is of rectangular cross section, mainly of sheet roll material, the longitudinal protrusion of which, forming a closed connection such as a lock, made in the form of a “Laying Seam", is directed into the pipe and is located on a shelf in its middle part.

Fig.14. The pipe is of rectangular cross section, mainly of sheet roll material, the longitudinal protrusion of which, forming a closed connection of the lock type, made in the form of a “Lay Folding”, is directed outside the pipe and is located on a shelf in its middle part.

Fig.15. A square tube, mainly made of sheet roll material, a longitudinal protrusion of which, forming a closed connection such as a lock made in the form of a “Reclining Seam", is directed inside the pipe and is located on the wall in its lower part.

Fig.16. The pipe is of rectangular cross section, mainly of sheet roll material, the longitudinal protrusion of which, forming a closed connection such as a lock, made in the form of a “Recumbent Seam", is directed outside the pipe and is located on the wall in its lower part.

The essence of the utility model.

A pipe of square or rectangular cross section, mainly from sheet roll material, is made by bending on special equipment from a special tape or sheet. The pipe contains the left wall 1 (Fig.1-16) and the right wall 2 (Fig.1-16). The upper part of the left wall 1 (Fig. 1-16) and the right wall 2 (Fig. 1-16) are bent to form the upper shelf 3 (Fig. 1-16), and the lower part of which is bent to form the lower shelf 4 (Fig. .1-16). The wall 1 (Figs. 1-7, 15, 16) has two, interlocking equal in height of the limb, forming a protrusion 5 directed into the inside of the pipe (Figs. 1-7, 15, 16). Performed on the walls 1 (Fig.2-7) or on the walls 2 (Fig.1, 15, 16), the bend 6 (Fig.1-4) is formed by the side of the steel sheet or tape coming from the upper shelf 3 (Fig.1- 7, 15, 16) and is directed parallel to the wall 1 (Fig.2-7) or to the wall 2 (Fig.1, 15, 16) up. The limb 7 on the wall 1 (Fig.2-7) or on the walls 2 (Fig.1, 15, 16) is formed by the side of the steel sheet or tape emanating from the lower shelf 2 (Fig.1-7, 15, 16) and is directed in parallel wall 1 (Fig.2-7) or wall 2 (Fig.1, 15, 16) down. Inside the limb 6 (Figs. 1-7, 15, 16), between its parallel sides, a longitudinal channel 8 is formed (Figs. 1-7, 15, 16), directed upward. Inside the limb 7 (Figs. 1-7, 15, 16) between the parallel sides, a longitudinal channel 9 (Figs. 1-7, 15, 16) is formed, directed downward. In the longitudinal channel 8 (Figs. 1-7, 15, 16), directed upward, a bent side is installed, the downward-facing side of the bend 7 (Figs. 1-7, 15, 16) is tightly adjacent to it. In the longitudinal channel 9 (Figs. 1-7, 15, 16), directed downward, an upwardly curved side of the steel sheet or bend strip 6 (Figs. 1-7, 15, 16) is installed. The bent sides of the steel sheet or tape of each bend 6 (Fig.1-7, 15, 16) and 7 (Fig.1-7, 15, 16) are installed with a snug fit in their longitudinal channels, respectively 9 (Fig.1-7, 15, 16) and 8 (Fig. 1) form a closed connection lock made in the form of a “Lay Folding”. It is preferable that two bends 6 and 7, conjugate with each other, equal in height (Figs. 1-7, 15, 16), forming a longitudinal protrusion 5 (Figs. 1-7, 15, 16) and a closed lock-type connection made in the form The “lying fold” was directed into the inside of the pipe and located on the wall in its middle part (Figs. 1, 3, 4) or in its upper part (Fig. 2) or in its lower part (Fig. 15).

It is advisable that two limbs 6 and 7, conjugated with each other, equal in height (Figs. 1-7, 15, 16), forming a longitudinal protrusion 5 (Figs. 1-7, 15, 16) and a closed lock-type connection made in the form “Recumbent Seam”, were directed outside the pipe and are located on the wall in its middle part (Fig.6) or in its upper part (Fig.5, 7) or in its lower part (Fig.16). On the upper flange 3 (Figs. 8-12, 14) or on the lower flange 4 (Fig. 13), two bends 6 and 7, conjugate with each other, equal in height, (fig. 8-14), forming a longitudinal protrusion 5 ( 1-7, 15, 16). The limb 6 (Fig. 8-14) is made by the side of the steel sheet or strip emanating from the left wall 1 (Fig. 8-14) and is directed parallel to the upper shelf 3 (Fig. 8-14) and to the lower shelf 4 (Fig. 8- 14) to the left, with the formation of the left-directed longitudinal channel 8 (Fig.8-14), made between its sides. The second limb 7 (Figs. 8-14) is made by the side of the steel sheet or strip emanating from the right wall 2 (Figs. 8-14) and is directed parallel to the upper shelf 3 (Figs. 8-14) and to the lower shelf 4 (Figs. 8-14) to the right, with the formation of the right-directed longitudinal channel 9 (Fig.8-14), made between its sides. Moreover, the side of the steel sheet or bending tape 7 (Figs. 8-14) directed to the right is installed in the longitudinal channel 8 (Figs. 8-14) of the bending 6 (Figs. The side of the steel sheet or bending tape 6 (Figs. 8-14) directed to the left is installed in the longitudinal channel 9 (Figs. 14-14) of the bending 7 (Figs. 8-14) directed to the right, tightly fitting to it, with the formation of a closed connection of the type a lock made in the form of a “Reclining Seam".

It is preferable that two limbs 6 (Figs. 8-14) and 7 (Figs. 8-14), paired with each other, equal in height, forming a longitudinal protrusion 5 (Figs. 8-14) and a closed lock-type connection made in the form of " Lying fold ”, were directed into the inside of a square or rectangular pipe in and are located on the upper shelf 3 (Fig. 8-14) or lower shelf 4 (Fig. 8-14) of a square or rectangular pipe in the middle part (Fig. 9 , 13) either on the right side (Fig. 8) or on the left side (not shown in the drawing).

It is advisable that two limb 6, conjugated with each other, equal in height (Figs. 8-14) and 7 (Figs. 8-14), forming a longitudinal protrusion 5 (Figs. 8-14) and a closed lock type connection made in the form of " Recumbent Seam ”, pipes of square or rectangular cross-section were directed outward and located on the upper flange 3 (Figs. 8-14) or lower flange 4 (Figs. 8-14) in the middle part (Figs. 11, 14) or on the right side (figure 10) or in the left part (not shown in the drawing).

An example of a square tube:

The walls have a height of 25 mm, the width of the upper and lower shelves is 25 mm, the height of the longitudinal protrusion is 5.2 mm, the thickness of the workpiece material is 0.3 to 2 mm, the inner radii are 0.5 mm, the crescent shape is 1 m in length, not more than 1 mm, and marginal deviation of angles + _1 degrees.

Examples of execution of a pipe of rectangular cross section.

1. The walls have a height of 28 mm, the width of the upper and lower shelves is 25 mm.

2. The walls have a height of 40 mm, the width of the upper and lower shelves is 20 mm.

3. The walls have a height of 40 mm, the width of the upper and lower shelves is 25 mm.

4. The walls have a height of 40 mm, the width of the upper and lower shelves is 28 mm.

5. The walls have a height of 50 mm, the width of the upper and lower shelves is 25 mm.

6 The walls have a height of 60 mm, the width of the upper and lower shelves is 30 mm.

Two bends 6 and 7, which are paired with each other and equal in height, forming a longitudinal protrusion 5 and a closed connection of the lock type, made in the form of a “Recumbent Seam", can be directed inside the pipe and located on the wall in its middle part or in its upper part or in its lower part, and also pipes can be directed outside and located on the wall in its middle part or in its upper part or in its lower part. In addition, two bends 6 and 7, which are paired with each other and equal in height, forming a longitudinal protrusion 5 and a closed lock-type connection made in the form of a “Recumbent Seam", can be directed into the inside of a square or rectangular pipe in and are located on the upper shelf 3 or the lower flange 4 of a pipe of square or rectangular cross section in the middle part or in the right part or in the left part, and can also be directed outside the pipe of square or rectangular cross section and are located on the upper flange 3 or lower flange 4 in the middle Asti or on the right side or the left side. In all cases, the height of the longitudinal protrusion of 5.2 mm, the thickness of the workpiece material from 0.3 mm. up to 2 mm., inner radii 0.5 mm, crescent length 1 m, not more than 1 mm, and the maximum deviation of the angles + _1 degrees. This embodiment of a square and rectangular pipe allows you to get an element that, in addition to the required strength parameters, allows you to expand the range of its use in the design of the greenhouse in various combinations and combinations, as well as in the manufacture of other metal structures.

Claims (14)

1. A pipe of square or rectangular cross section, predominantly made of sheet roll material, containing at least one wall, characterized in that the pipe is made of square or rectangular cross section by bending from a steel sheet or tape, contains upper and lower shelves and two side walls mentioned moreover, on one of the said walls there are two bends, equal in height, conjugated with each other with the formation of a longitudinal said protrusion directed inside the pipe, wherein one said bend is made the roll of the steel sheet or tape extending from the upper shelf is directed parallel to the wall upward with the formation of an upwardly directed longitudinal channel made between its sides, and the second said bending is made by the side of the steel sheet or tape emanating from the lower shelf and is directed parallel to the wall downward the formation of a downwardly directed longitudinal channel made between its sides, the side of a steel sheet or strip of said bending pointing downwardly being installed in said longitudinal the bending analge directed upward, closely fitting to it, and the side of the steel sheet or tape of the said elbowing directed upward, is installed in the aforementioned longitudinal bending channel, directed downward, closely fitting to it, with the formation of a closed connection such as a lock made in the form of Seam ". 2. A square or rectangular pipe predominantly made from sheet roll material according to claim 1, characterized in that the two said two interlocking equal in height bends, forming a longitudinal protrusion and a closed connection such as a lock made in the form of a “Recumbent Seam”, are directed inside the pipe and located on the wall in its middle part. 3. A square or rectangular pipe predominantly made from sheet web material according to claim 1, characterized in that the two said two interlocking equal in height bends, forming a longitudinal protrusion and a closed connection such as a lock made in the form of a “Recumbent Seam”, are directed inwards pipes and are located on the wall in its upper part. 4. A square or rectangular pipe predominantly made from sheet web material according to claim 1, characterized in that the two said two interlocking equal in height bends, forming a longitudinal protrusion and a closed connection such as a lock made in the form of a “Recumbent Seam”, are directed inwards pipes and are located on the wall in its lower part. 5. A square or rectangular pipe predominantly made from sheet roll material according to claim 1, characterized in that the two said two interlocking equal in height bends, forming a longitudinal protrusion and a closed connection such as a lock made in the form of a “Recumbent Seam”, are directed outward pipes and are located on the wall in its middle part. 6. A square or rectangular pipe predominantly made from sheet roll material according to claim 1, characterized in that the two said two interlocking equal in height bends, forming a longitudinal protrusion and a closed connection such as a lock made in the form of a “Recumbent Seam”, are directed outward pipes and are located on the wall in its upper part. 7. A square or rectangular pipe predominantly made from sheet roll material according to claim 1, characterized in that the two said two interlocking equal in height bends, forming a longitudinal protrusion and a closed connection such as a lock made in the form of a “Recumbent Seam”, are directed outward pipes and are located on the wall in its lower part. 8. A pipe of square or rectangular cross section, predominantly of sheet rolled material, containing at least one wall, characterized in that the pipe is square or rectangular by bending from a steel sheet or tape, contains upper and lower shelves and two side walls mentioned moreover, on one of the said shelves on its inner side there are two bends of equal height interlocking with each other with the formation of a longitudinal protrusion directed inside the pipe, with one said bend executed by the side of the steel sheet or tape emanating from the left-hand wall, directed parallel to the shelf to the left with the formation of a left-directed longitudinal channel made between its sides, and the second mentioned folding is made by the side of the steel sheet or tape emanating from the right-hand wall, and directed parallel to the shelf to the right with the formation of a longitudinal channel directed to the right, made between its sides, and the side of the steel sheet or tape of the said bending, directed to the right, is set and in said longitudinal bending channel directed to the left, lying snugly against it, and the side of the steel sheet or tape of said bending directed to the left, is installed in the said longitudinal channel of bending, directed to the right, fitting snugly against it, with the formation of said closed lock type connection, made in the form of "Recumbent Seam". 9. A square or rectangular pipe predominantly made from sheet roll material according to claim 8, characterized in that the two said two interlocking equal in height bends, forming a longitudinal protrusion and a closed connection such as a lock made in the form of a “Recumbent Seam”, are directed inwards pipes and are located on a shelf in its left part. 10. A square or rectangular pipe predominantly made from sheet roll material according to claim 8, characterized in that the two said two interlocking equal in height bends, forming a longitudinal protrusion and a closed connection such as a lock made in the form of a “Recumbent Seam”, are directed inside the pipe and located on a shelf in its middle part. 11. A square or rectangular pipe predominantly made from sheet roll material according to claim 8, characterized in that the two said two interlocking equal in height bends, forming a longitudinal protrusion and a closed connection such as a lock made in the form of a “Recumbent Seam”, are directed inside the pipe and are located on a shelf in its right side. 12. A square or rectangular pipe predominantly made of sheet roll material according to claim 7, characterized in that the two said two interlocking equal in height bends, forming a longitudinal protrusion and a closed connection such as a lock made in the form of a "Recumbent Seam", are directed outward pipes and are located on a shelf in its middle part. 13. A square or rectangular pipe predominantly made of sheet web material according to claim 7, characterized in that the two said two interlocking equal in height bends, forming a longitudinal protrusion and a closed connection such as a lock made in the form of a "Recumbent Seam", are directed outward pipes and are located on a shelf in its left part. 14. A square or rectangular pipe predominantly made from sheet web material according to claim 7, characterized in that the two said two interlocking equal in height bends, forming a longitudinal protrusion and a closed connection such as a lock made in the form of a “Recumbent Seam”, are directed outward pipes and are located on a shelf in its right side.