RU168799U1 - ARCH TYPE FARM - Google Patents

Abstract

The utility model relates to arched-type trusses and is mainly used in arched-type canopies for cars or gazebos. The technical result of the utility model is to reduce the metal consumption of the truss, simplifying the manufacturing and assembly technology of the truss, which is achieved due to the fact that the truss-type arches contain lower and upper arches, between which strips are installed with the formation of resistant angles, differs in that the strips are connected in pairs on the lower arch and form a discrete structure of inverted supports squares, with the length of the strips I = 0.03L + 0.168 + k1, and the angle of inclination of the ends of the strips α = 2.5L + 47 + k2, where L is the distance between the extreme strips that are located vertically between the inner surface of the upper arch and the ends the lower arch, the height of the truss H = 0,097L + 0,117 + k3, where k1 is a coefficient selected in the range from -0.05 to 0 m, k2 is a coefficient selected in the range from -4 to 0 deg., k3 is a coefficient, selectable in the range from -0.4 to +0.6 m.

Description

The utility model relates to arched-type trusses and is mainly used in arched-type canopies for cars or arbors.

The ARCH TYPE FARM is known from the prior art.

[http://www.zavodsz.ru/Metallokonstruktsii/metallicheskie-arki.html, publ. 06/14/2014], containing the lower arch and two upper arches, between which transverse trims are installed, while between the upper and lower arches, pairwise inclined trims are installed, which form two parallel continuous structures of the supporting squares.

The disadvantage of the analogue is the large metal consumption of the arch-type truss, the use of 2 types of trims, and the need to form 2 continuous structures of the supporting squares, which complicates the manufacturing technology of the truss.

The closest in technical essence is the FARM ARCH TYPE [http://kranovoy.ru/assets/images/D7.tif, publ. 07/09/2016], containing the lower arch and the upper arch, between which the slats are installed, while the extreme laths are made with a length equal to the height of the truss, and the adjacent laths are made with an increased length in comparison with the rest of the laths, which form a continuous structure of supporting squares.

The disadvantage of the prototype is the large metal consumption of the farm, which is due to the fact that the planks form a continuous structure of supporting squares, as well as the need to use 3 types of trims for one truss, which complicates the manufacturing and assembly technology of the truss.

The technical result of the utility model is to reduce the metal consumption of the farm, simplifying the manufacturing and assembly technology of the farm.

The indicated technical result of the utility model is achieved due to the fact that the truss is arched type, containing the lower and upper arches, between which there are planks with the formation of angles, characterized in that the trims are paired on the lower arch and form a discrete structure of inverted supporting angles, the length of the planks is I = 0.03 L + 0.168 + k1, and the angle of inclination of the ends of the planks is α = 2.5L + 47 + k2, where L is the distance between the extreme planks, which are located vertically between the inner surface of the upper arch and the ends of the lower a ki, farm height Н = 0,097L + 0,117 + k3, where k1 is a coefficient selected in the range from -0.05 to 0 m, k2 is a coefficient selected in the range from -4 to 0 deg., k3-coefficient is selected in the range from -0.4 to +0.6 m.

In particular, the normal distance from the inner to the outer surface of the truss h is 0.3 m at L in the range from 2.8 to 4.5 m and 0.35 m at L in the range from 4.8 to 6 m. In particular , the width of the profile bar d for the width of the arch span L in the range from 2.8 to 4.5 m is 25 mm, for the width of the arch span L in the range from 4.8 to 6 m is 35 mm.

In particular, the lower ends of the extreme slats and the inner surface of the lower arch form a common continuous surface.

In particular, the distance between the extremes L is the width of the arched span.

In particular, the height of the farm H is selected based on the condition under which the minimum material consumption of the farm and sufficient strength and slope to maintain snow cover are ensured.

Brief Description of the Drawings

In FIG. 1 shows a truss structure of an arched canopy from one section of arches.

In FIG. 2 shows a truss structure of an arched canopy of two sections of arches.

In FIG. 3 shows the truss of an arched canopy truss.

The figures indicate: 1 - the lower arch, 2 - the upper arch, 3 - truss level, 4 - the fastening section of the arches, L - the width of the arch span, N - the height of the arch span, h - the height of the truss, I - the length of the truss, α - the angle of inclination of the end of the truss truss, d - the width of the truss profile.

Utility Model Implementation

The arch-type truss consists of the lower arch 1 and the upper arch 2, between which the trims 3 are installed so that adjacent pairs of trims 3 form a discrete structure of inverted support squares. The extreme laths 3 are located vertically between the inner surface of the upper arch 2 and the ends of the lower arch 1. The arch of the arch canopy is characterized by the width of the arch span L - this is the distance between the extreme laths 3, the height of the arch span H is the distance from the extreme lower points of the arch 1 to the upper point ( crown or ridge) of the inner surface of the arch 1, the height of the truss h is the normal distance from the inner surface of the arch 1 to the outer surface of the arch 2.

Plank 3 is characterized by a length I - this is the distance along the upper or lower surface from one end to the other, the angle of inclination of the ends α - is the angle in the vertical plane between the end plane and the upper or lower surfaces of the plank 3, the profile width d is, for example, the length of the side a square forming a cross section of the square profile of the strap 3 or the diameter of the circle of the round profile of the strap 3.

The design of the arched canopy truss may consist of two sections of arches (see Fig. 2), which are connected by a fastener 4, which can be represented by a bolt-on strip.

In 2016, the applicant, in order to optimize the structural parameters of the truss to minimize the metal consumption of the claimed design while maintaining the standard strength, conducted full-scale tests of mock-ups with the values of the arch span L = 2.88 m and 4.5 m.

When modeling the loads on the mock-ups, the optimal values of the structural parameters of the strips 3 were determined. So, for the width of the arch span L = 2.88 m, the optimal length of the strips 3 I was 0.25 m, and the optimal bevel angle of the ends a was 54 degrees, for the width the arch span L = 4.5 m, the optimal length of the strips 3 I was 0.3 m, and the optimal bevel angle α of the ends was 58 degrees.

Based on the results of the experiments, the functional dependences of the ranges of the optimal design parameters of the strips 3 were determined depending on the width of the arch span I = 0.03 L + 0.168 + k1 and α = 2.5L + 47 + k2, where k1 is a coefficient selected in the range from -0 , 05 to 0 m, k2 - coefficient selected in the range from -4 to 0 deg.

In the same way, the functional dependence of the optimal height of the arch-type truss was determined depending on the width of the arch span H = 0.097L + 0.117 + k3, where k3 is a coefficient selected in the range from -0.4 to + 0.6 m.

With the indicated functional dependencies of the design parameters, the truss width h will be 0.3 m at L from 2.8 to 4.5 m and 0.35 m at L from 4.8 to 6 m.

The width of the bar profile d for the width of the arch span L from 2.8 to 4.5 m is 25 mm, for the width of the arch span L from 4.8 to 6 m d will be 35 mm.

Let us explain the practical use of the obtained functional dependences in order to determine the geometric characteristics of the arch-type truss for the arch span width L = 4.4 m, k1 = -0.05 m, k2 = -4 deg., K3 = -0.02 m.

For these initial values, the length of the truss bar I = 0.25 m, the angle of inclination of the end of the truss bar α = 54 degrees, the height of the arch span H = 0.52 m, the height of the truss h = 0.3 m, the width of the profile d = 25 mm

In the same way, to clarify the practical use of the obtained functional dependencies, we define the geometric characteristics of the arch-type truss for the arch span width L = 6 m, k1 = -0.05 m, k2 = -4 deg., K3 = -0.02 m.

For these initial values, the length of the truss bar I = 0.3 m, the angle of inclination of the end of the truss bar α = 58 degrees, the height of the arch span H = 0.68 m, the height of the truss h = 0.35 m, the width of the profile d = 35 mm

The technical result of the utility model is the reduction in the metal consumption of the arch-type truss due to the fact that the strips 3 are connected in pairs on the lower arch 1 and form a discrete structure of inverted support squares, which reduces the number of strips 3. In addition, this technical result is achieved by the fact that for the manufacture of trusses use trims 3 of optimal length I = 0.03 L + 0.168 + k1 and the angle of inclination of the ends of the trims α = 2.5L + 47 + k2, as well as arches 1 and 2, the optimal height of which is determined by the ratio H = 0,097L + 0,117 + k3, k which depend only on the width of the arched span L.

The technical result of the utility model is that simplification of manufacturing technology is achieved by using only strips 3 of the same type, including using them as extreme struts, while simplification of assembly technology is achieved by forming a discrete structure from inverted support squares, which is much simpler than assembling a continuous structure, because no need to mark the installation location of the strips 3 on the arch 2, since they are installed in pairs on the arch 1, and the ends simply burst the base of the upper arch 2. The advantages of the declared arch type truss are:

- universality of the shape of the strips 3 for a wide range of widths of arched spans within 1.5 meters, which makes it possible to save materials and produce fewer types of trusses;

- no need for intermediate struts between the arched sections, because the design is highly durable;

- the lack of the need to perform individual designs of extreme struts.

Claims (6)

1. An arch-type truss containing lower and upper arches, between which strips are installed with the formation of stop angles, characterized in that the strips are connected in pairs on the lower arch and form a discrete structure of inverted support angles, while the length of the strips I = 0.03L + 0.168 + k1, and the angle of inclination of the ends of the trims α = 2.5L + 47 + k2, where L is the distance between the extreme trims that are located vertically between the inner surface of the upper arch and the ends of the lower arch, truss height H = 0.097L + 0.117 + k3 where k1 is a coefficient selected in the range from -0.05 d about 0 m, k2 - coefficient selected in the range from - 4 to 0 degrees, k3 - coefficient selected in the range from -0.4 to +0.6 m. 2. The farm according to claim 1, characterized in that the normal distance from the inner to the outer surface of the farm h is 0.3 m at L in the range from 2.8 to 4.5 m and 0.35 m at L in the range from 4.8 to 6 m. 3. The truss according to claim 1, characterized in that the width of the bar profile d for the width of the arch span L in the range from 2.8 to 4.5 m is 25 mm, for the width of the arch span L in the range from 4.8 to 6 m is 35 mm. 4. The farm according to claim 1, characterized in that the lower ends of the extreme slats and the inner surface of the lower arch form a common continuous surface. 5. The farm according to claim 1, characterized in that the distance between the extreme slats L is the width of the arch span. 6. The farm according to claim 1, characterized in that the height of the farm N is chosen based on the condition under which the minimum material consumption of the farm and sufficient strength and slope to maintain snow cover are ensured.

Images