RU2333327C1 - Guard rail - Google Patents

Abstract

FIELD: constructional engineering.

SUBSTANCE: guard rail contains load-bearing racks to be installed along the perimeter of protected area. Load-bearing racks have metal mesh cloth placed thereon, made in the form of interconnected and consistently tightened along perimeter mesh panels of steel pretensioned wire with drawing strengthened skin with intersecting rods welded and hot-dip galvanised at iron and zinc ratio changing by skin direction in the range of 1:3 to 5:1000 respectively. The mesh cloth of vertical panels is fixed to racks by means of wire shackles, rods of adjacent mesh panels being interconnected with an overlap outside racks by means of metal plate clamps. Single clamp fastens adjacent net sections of guide unit, white double clamp attaches basic net section to vertical or horizontal net sections of tunnel-preventive covering and sections of forward and backward climbing shields. Welded joints of section mesh cloth are directed to outer side of guar rail. Guar racks are mounted from guar outer side. Section wire skin covers trengthened layer and have galvanised coating of density at of least 0.210 kg/m². Strengthened section wire skin is produced by drawing. The racks design is simplified, accuracy of net effect detection is improved even in case of single damage, cost is lowered, maintenance service is simplified, parameters variety of net and racks coating is excluded, and thus improved reliability unter hard climatic conditions is provided.

EFFECT: construction of effective external guard rail; wider range of external guard rails.

16 cl, 11 dwg

Description

The invention relates to technical means of protecting objects and can be used to protect the perimeters of sensitive objects for various purposes from intruders, vehicles, domestic and wild animals.

An external mesh fence is known in the form of a woven mesh, from the wire spirals of which are protected by a polymer coating, by connecting the ends of the mesh with jumpers on their edges, N signaling wires are formed, consisting of two branches of loops, the ends of the branches are on one of the edges, between the ends of the branches of each the loop resistor is turned on, and the electrical connections of the wire spirals are isolated, where N is a positive integer equal to or more than one. Wire spirals of the grid, forming various branches of the loops, are connected, periodically alternating in accordance with the normal numerical series from 1 to 2N, are connected according to any arbitrary regularity or without observing it. Jumpers connecting the ends of the wire spirals of the grid at each of its edges are located in a closed box (RU No. 1040041020, 110106).

The disadvantages of this fence are the complexity of the grid design and the low reliability and accuracy of control devices, high cost, complexity of maintenance, low durability in difficult climatic conditions.

An external fence is also known, which is a mesh fence for guarding the perimeters of objects, containing load-bearing racks, a mesh cloth and a cable sensing element, in which the load-bearing racks are made of three parts having different stiffness due to changes in the cross section of the profile of each part in shape - from box-shaped in the lower part to the U-shaped in the middle and upper parts, and in area that decreases with the transition from the middle part to the upper (RU No. 2266392, 2005, prototype).

The disadvantages of this fence are the complexity of the construction of composite racks with extensions, low accuracy of detecting impact on the mesh, especially with a single damage, high cost, complexity of maintenance, the possibility of a large spread in the parameters of coverage of the mesh and racks, which is due to the low durability in difficult climatic conditions.

An object of the invention is the creation of an effective external fence and the expansion of the arsenal of external fences.

The technical result that provides the solution of the problem lies in the fact that the design of the racks is simplified, the accuracy of detecting the impact on the grid is improved even with a single damage, the cost is reduced, maintenance is simplified, the spread of the parameters of the grid and racks coverage is excluded, due to which increased durability in difficult climatic conditions.

The essence of the invention lies in the fact that the fence contains support racks for installation around the perimeter of the enclosed area and a metal mesh cloth mounted on the racks, as well as connecting elements and means for detecting effects on the fabric, the mesh cloth being made in the form of interconnected and sequentially stretched along the perimeter of the mesh panels of steel prestressed wire with a hardened surface layer, the intersecting rods of which are welded together and galvanized hot galvanized steel with a ratio of iron and zinc, changing in the direction of the outer surface from 1: 3 to 5: 1000, respectively, while the bars of adjacent mesh panels are overlapped outside the racks.

Preferably, the mesh web is connected to the uprights by wire connecting brackets, and the rods of adjacent mesh panels are lapped together by clamps from a metal plate, the welded seams of the mesh web are preferably facing the outside of the guard, the guard struts are preferably mounted on the outside of the guard, wire coating sections applied to the hardened layer and made with a density of zinc coating of at least 0.210 kg / m ² , the hardened surface layer of wire drawn by drawing, racks are made of cold-rolled sheet steel with a longitudinal weld and are hot-dip galvanized with a zinc coating density of at least 0.210 kg / m ² and with a ratio of iron and zinc varying from 1: 3 to the outer surface 5: 1000, respectively, with the upper end of the rack equipped with an aluminum or plastic cap.

In particular cases of implementation, the mesh web can be installed directly on the ground, or the mesh web can be partially buried in the ground, or an additional mesh web, partially buried in the ground, can be attached to the mesh web, or to the mesh web using the connecting brackets an additional mesh cloth bent at an angle of 100 ° and laid on the ground can be fixed; in other cases, solid sheet metal panels can be installed between the mesh cloth and the ground th metal, galvanized by hot dip galvanizing or concrete structures.

In any case, the implementation of the fence can be equipped with an external antiphase visor or can be equipped with an external antiphase and internal antiphase visors. In addition, the fence may preferably be equipped with means for detecting effects on the fence, responsive to vibration.

In Fig.1 shows a fence with an external anti-climbing peak, Fig.2 is a side view of Fig.1, Fig.3 is a fence with an external and internal anti-climbing visors and with a vertical underflooring, in Fig.4 is a side view of Fig .3, in Fig. 5 - a fence with a straight peak and a horizontal underfloor sheathing, in Fig. 6 - a side view in Fig. 5, in Fig. 7 - a fence with panels of sheet metal, in Fig. 8 - a mesh panel mount to the stand, in Fig.9 - a bracket made of wire, in Fig.10 - a single clamp from a metal plate, on fi d.11 - double clamp from a metal plate.

The fence contains support racks 1 for installation around the perimeter of the enclosed area. On the rack 1, a metal mesh cloth is installed in the form of mesh panels 2, 7, 8 connected to each other and sequentially stretched along the perimeter of steel prestressed wire with a reinforced drawing surface layer, the intersecting rods 3 of which are welded together and galvanized by hot-dip galvanizing with an iron ratio and zinc, varying towards the outer surface from 1: 3 to 5: 1000 (from 75 to 99.5%), respectively.

The mesh fabric of the vertical panels 2 is connected to the posts 1 by connecting brackets 4 of wire, and the rods 3 of the adjacent mesh panels 2 are lapped together outside the posts 1 by means of clips 5 of a metal plate. A single clamp 5 is used to secure adjacent mesh sections 2 of the fence with each other. Double clamp 6 is used to connect the main mesh section 2 with vertical or horizontal mesh sections 7 of the underfloor sheathing and sections 8 of the forward and reverse anti-climb peaks.

Welded seams (not indicated) of the mesh web sections 2 are facing the outside of the fence. The racks 1 of the fence are installed on the outside of the fence.

The wire coating of sections 2, 7, 8 is applied to the hardened layer and is made with a zinc coating density of at least 0.210 kg / m ² . The hardened surface layer of the wire sections 2, 7, 8 obtained by drawing.

Racks 1 are made of cold rolled sheet steel with a longitudinal weld. Racks 1 are hot-dip galvanized with a zinc coating density of at least 0.210 kg / m ² and a ratio of iron and zinc varying from 1: 3 to 5: 1000 (from 75 to 99.5%) towards the outer surface accordingly, while the upper end of the rack is equipped with an aluminum or plastic cap 9.

The mesh cloth of sections 2 can be installed directly on the ground, or the mesh cloth of sections 2 can be partially buried in the ground, or an additional mesh cloth, partially buried in the ground, is attached to the mesh cloth of the sections 2, as shown in figure 1 , 3, or to the mesh cloth of sections 2 with the help of connecting brackets 4 an additional mesh cloth is bent at an angle of 90 ° for laying on the ground, as shown in Fig.5, 6, or between the mesh cloth of sections 2 and the ground installed One-piece panels 10 are made of hot-dip galvanized sheet metal, as shown in Fig. 7, or reinforced concrete structures (not shown) are installed between the mesh web of sections 2 and the ground.

The guard may be provided with an external anti-climb visor with sections 8, as shown in FIG. 1, or the guard may be equipped with an external anti-climb visor and sections 8, as shown in FIG. 3. The fence is equipped with means for detecting effects on the vibration-sensitive fence, made in the form of one or more sensors 11 connected to a computer and then to a monitor and printer (not shown).

The fence is mounted and operated as follows.

The marking of the site for the installation of fencing in straight sections of the perimeter is carried out using a conventional cord, stretched between the proposed installation points of the extreme racks of the site.

To determine the installation points of the racks 1, the entire rectilinear section is divided into segments 2.5 meters long, equal in length to one section 2 of the fence. The installation locations of the racks 1 are marked with pegs driven into the ground.

In the places where the racks 1 are installed, using a drilling device with a diameter of 30 cm, soil is selected to a depth of not less than 90 cm. Gravel must be added to the bottom of the pits so that the top point of the rack 1 installed on it is at a distance of 315 cm from the ground.

The racks 1 mounted on gravel are poured with concrete mortar. Prior to the complete hardening of concrete, it is necessary to monitor the vertical position of the uprights 1 using a level with magnetic fastening, as well as the location of the uprights 1 in exactly one line in accordance with the marking.

Prior to the installation of the grid sections 2 on the racks 1, it is necessary to first connect the main grid sections 2 to the sections 8 of the direct visor using single clamps 5, if it is provided in this fence.

The connection is overlapped by the size of two cells 50x200 mm of the distance between the rods 3 of the grid sections 2.

After fixing 5-6 mesh sections 2 of the fence using a special tensioning winch, the mesh of sections 2 is stretched and finally fixed to the posts 1. The entire fence is installed in the same sequence. In the case of installing a fence with a reverse visor, the sections 8 of the reverse visor are fixed after fixing the main mesh section 2 and section 8 of the direct visor. The connection of sections 8 with vertical sections 2 is carried out using double clamps 6, with a removal of 0.6 meters in both directions (to / from the controlled area), passing along the top of the vertical part. Next, the tension of the mesh sections 2, as described above. To prevent penetration of the object by digging under the fence, mesh panels 7 are installed, installed in the ground or parallel to the ground, 0.6 meters wide.

The solid fence depicted in Fig. 7 is an opaque construction of a combined type, consisting of solid galvanized metal panels 10, 1.5 mm thick, 2 meters high, on top of which mesh panels 2 with a height of 1 meter are installed. Thus, the total height of the fence is 3 meters. Similarly, instead of panels 10, reinforced concrete panels or blocks can be installed.

Small bumps in the relief that could not be removed at the time of preparing the perimeter section can be compensated by trimming the mesh section 2 from the bottom with a special cutting tool.

A properly installed fence should not have freely moving components relative to each other. Gusts of wind and light blows on the fence should not cause rattling of structural elements.

A reinforced barbed tape (of the “Egoza” type) can be installed on the anti-climbing peak.

Installation of means for detecting the impact on the fence of the system elements that are part of the perimeter security alarm is carried out in accordance with the installation instructions of the system after the installation of the fence is complete.

An external mesh sectional fence is designed to protect objects of various purposes from intruders, vehicles, domestic and wild animals.

Sectional fencing can be used in various options for constructing the physical strength system of an object, such as:

- external physical enclosure;

- a physical fence separating the exclusion zone from the inside or outside of the facility;

- a physical fence separating the internal regime zones from the rest of the facility;

- a physical fence equipped with perimeter detection equipment for any of the perimeter security lines.

Section fence can be used in different versions:

- external fence with a direct peak;

- external fencing with a direct visor and underfloor protection;

- external fence with direct and reverse visor;

- external fence with direct and reverse visor and underfloor protection.

The option of the fence is selected based on the possible directions of its overcoming by the probable intruder and the location of the fence on the ground.

Installation of fencing can be carried out both directly on the ground, and on reinforced concrete structures that impede an attempt to undermine in order to penetrate the object.

The mounted guard put into operation consists of a structure 2.4–3.5 m high, consisting of a vertical part, and an anti-climb V-shaped (forward and reverse in combination) visor with a 0.6 meter extension to both sides (in / from the controlled area) passing along the top of the vertical part. To prevent penetration of the object by digging under the fence, mesh panels are used that are installed in the ground or parallel to the ground, 0.6 meters wide.

A distinctive feature of this type of fencing, due to its unique properties (internal stress), is the absence of any stiffeners, which is an additional obstacle for a potential intruder.

To ensure the long-term operation of mesh panel fencing, all structural elements are galvanized with hot zinc (min 0.15-0.210 kg / m ² ).

During galvanizing, the mesh panel 2, 7, 8 is completely immersed in a bath with molten zinc (~ 460 ° C). This operation is performed after welding the wire into a single mesh of sections 2, 7, 8, as a result of the reaction, a ferro-zinc alloy is formed on the entire surface of the product, consisting of four layers with different specific ratios of iron and zinc. The lowest Gamma layer is an alloy of 25% iron and 75% zinc. Next comes the Delta layer, which contains 10% iron. The next layer, called the Zet layer, already consists of 6% iron and 94% zinc, and finally a fourth layer is formed on the surface, consisting of almost pure (at least 99.5%) zinc. This structure of the hot-dip galvanized surface provides excellent adhesion between steel and zinc, which no other paint, varnish, polymer or metallized coating can provide.

The uniqueness of such a zinc coating lies in the fact that it creates not only an anti-corrosion barrier with a thickness of 90-120 microns, but also provides electrochemical protection of steel. The specified thickness of the protective zinc layer being created significantly exceeds the parameters of other manufacturers.

Steel with such a thickness of the protective zinc layer can last up to 50 years without visible corrosion damage and renewal of the zinc coating.

The main characteristics of the welded mesh panels 2, 7, 8 fencing:

- The diameter of the wire mesh (after drawing) is 4.5 mm.

- The cell size is 50 × 200 mm.

- The minimum density of the zinc coating is 0.210 kg / m ² .

- Zinc purity - not less than 99.5%.

- The tensile strength of the wire is not less than 596 MPa.

- The strength of the weld is 2890 N.

The strength of the rod 3, of which the welded mesh fence is made, does not allow for a bite of the fence using improvised means.

The fencing sections are welded under tension, which makes it possible to detect damage to the mesh by burning, for example, with a gas torch (burst string effect) using means for detecting impact on the web, for example, technical vibrating tools such as Intrudalert-5500, Barrier. In this case, even with a single damage, the impulse and vibration are transmitted along the entire perimeter of the fence, are recorded by the computer and displayed on the monitor and / or printer.

The linear part of the fence during installation is stretched and overlapped outside the posts of the fence. The welded joints of the lattice structure are turned in the direction of penetration of the intruder, which makes it impossible to support the descent from the fence. The fence posts are installed on the outside of the trellised fence to create additional obstacles for the intruder during the operation of the fence.

This fence is quite simple to install, reliable in operation both from the point of view of its long-term preservation in readiness, and from the point of view of functional reliability, since it excludes the possibility of any quick overcoming of the fence and penetration into the protected area. In addition, any person who intends to unauthorizedly enter the fenced territory will not be able to break and overcome this fence without being detected.

Thus, an effective fence was created and the arsenal of fences was expanded.

At the same time, the design of the racks is simplified, the accuracy of detecting the impact on the grid is improved even with a single damage, the cost is reduced, maintenance is simplified, the spread of the parameters of the coating of the grid and racks is excluded, which is due to increased durability in difficult climatic conditions.

Claims (17)

1. A fence containing support racks for installation around the perimeter of the enclosed area and a metal mesh cloth installed on the racks, as well as connecting elements and means for detecting impact on the canvas, characterized in that the mesh cloth is made in the form of interconnected and sequentially stretched along the perimeter mesh panels of steel prestressed wire with a hardened surface layer, the intersecting rods of which are welded together and then hot-dip galvanized th galvanizing ratio of iron and zinc, changing the direction of the outer surface of from 1: 3 to 5: 1000, respectively, the rods of neighboring grid panels connected to each other is overlapped racks. 2. The fence according to claim 1, characterized in that the mesh fabric is connected to the posts by connecting brackets of wire, and the rods of adjacent mesh panels are overlapped by means of clamps from a metal plate. 3. The fence according to claim 1, characterized in that the welds of the mesh fabric are preferably facing the outside of the fence. 4. The fence according to claim 1, characterized in that the racks of the fence are preferably mounted on the outside of the fence. 5. The fence according to claim 1, characterized in that the coating of the wire sections applied to the hardened layer and made with a density of zinc coating of at least 0.210 kg / m ² . 6. The fence according to claim 5, characterized in that the hardened surface layer of the wire is obtained by drawing. 7. The fence according to claim 1, characterized in that the racks are made of cold rolled sheet steel with a longitudinal weld. 8. The fence according to claim 7, characterized in that the racks are hot-dip galvanized with a zinc coating density of at least 0.210 kg / m ² and with a ratio of iron and zinc varying from 1: 3 to 5 in relation to the outer surface : 1000, respectively, with the upper end of the rack equipped with an aluminum or plastic cap. 9. The fence according to any one of claims 1 to 8, characterized in that the mesh web is installed directly on the ground. 10. The fence according to any one of claims 1 to 8, characterized in that the mesh web is partially buried in the ground. 11. The fence according to any one of claims 1 to 8, characterized in that an additional mesh web is partially attached to the ground to the mesh web using connecting brackets. 12. The fence according to any one of claims 1 to 8, characterized in that an additional mesh web is fixed to the mesh web using connecting brackets, bent at an angle of 100 ° and laid on the ground. 13. The fence according to any one of claims 1 to 8, characterized in that between the mesh fabric and the ground there are solid panels of sheet metal, hot-dip galvanized. 14. The fence according to any one of claims 1 to 8, characterized in that reinforced concrete structures are installed between the mesh web and the ground. 15. The fence according to any one of claims 1 to 8, characterized in that it is provided with an external antirelapse visor. 16. The fence according to any one of claims 1 to 8, characterized in that it is provided with an external antiphase and an internal antiphase visor. 17. The fence according to any one of claims 1 to 8, characterized in that it is equipped with means for detecting effects on the fence, responsive to vibration.

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