RU2773569C1 - Folding trench attachment with canopy for welding - Google Patents

Abstract

FIELD: construction industry.

SUBSTANCE: invention relates to the field of construction or repair of pipelines and is intended to strengthen the walls of trenches dug in the ground during the repair or installation of main, technological and field pipelines, when there is no possibility of digging trenches with a slope or when the slope significantly increases the cost of work, and adverse weather conditions interfere with installation and welding work in the field conditions. The folding fastening of the trench with a canopy for welding work contains enclosing shields, crisscrossing spacers pivotally connected in the center, the upper ends of the struts are made with a hinged fastening, and the lower ends of the struts are made with the possibility of fastening and connector using pins passing through the corresponding holes. The surface of the enclosing shields along the contour is rigidly connected to the metal corners forming the frame, holes are made on the metal corners of the side surface of the enclosing shields along the entire length, ensuring the reinstallation of the struts depending on the configuration of the trench. The metal corners of the lower end surface of the enclosing shields are pivotally connected to the decking, providing isolation of workers from the soil and moisture of the trench bottom, a metal ladder is rigidly installed on the inside of the enclosing shield. A drum with a fabric canopy is rigidly mounted on the metal corner of the upper end of one enclosing shield. A crossbar is rigidly installed on the metal corner of the upper end of the second enclosing shield, which provides tension and fastening of the fabric canopy, mounting loops are located on the upper part of the shields.

EFFECT: increasing the efficiency of work, increasing the reliability and structural strength of the enclosing shields, reducing the metal consumption, labor intensity and duration of assembly and disassembly of the device, expanding the technological capabilities that ensure the performance of welding and installation work in all weather conditions, saving material costs and improving the safety and working culture of workers.

2 cl, 3 dwg

Description

The invention relates to the field of construction or repair of pipelines and is intended to strengthen the walls of trenches dug in the ground during the repair or installation of main, technological and field pipelines, when there is no possibility of digging trenches with a slope or when the slope significantly increases the cost of work, and unfavorable weather conditions interfere with installation and welding work in the field.

When repairing technological pipelines, work is carried out in a trench. The means of strengthening the edge of the trench for safe work in most cases is a slope - removing the soil at an angle corresponding to the parameters of the soil, at which the slipping of the edge of the soil under the action of its own weight becomes impossible. The slope, however, is not always a means of providing the possibility of repairing and laying communications. In the conditions of the oil field, the location of facilities and pipelines often does not allow the construction of a trench with a slope, in addition, the implementation of slopes at least doubles the amount of lifted soil, which means it increases one of the main components of the cost of work. In such cases, it is advisable to strengthen the trench wall with the help of additional materials - wood, metal. Usually the support consists of shields and spacers between them. The support restores the balance of soil pressure between the edge of the trench and the working space, from where the soil is removed - thus the collapse of the soil becomes impossible.

The disadvantage of the support is the spacers - it is necessary to have spacers of various lengths along the width of the trench or make them directly on the job site according to the size of the trench. The design of the support also does not provide for a ladder for descent and ascent, flooring to the bottom of the trench and protection from precipitation during work. To create favorable working conditions, stairs, flooring and rain cover must be delivered and installed separately, which requires additional labor and time resources.

A fencing device for strengthening the walls of a trench during earthworks is known (patent RU No. 2366781, publ. 10.09.2009). The structure consists of two aluminum-plastic walls and a frame consisting of two spacers made of aluminum pipes connected by four longitudinal and one diagonal rods. The walls are attached to the frame with wedge grips and fixed with locking pins.

The disadvantage of this design is the complexity and low efficiency of installation, the presence of longitudinal and diagonal rods does not allow the dismantling and installation of the coil by a crane. Due to the lack of protection from atmospheric precipitation, it is impossible to work in bad weather.

A device is known for protecting trench slopes from soil shedding (patent RU No. 2637250, publ. 12/01/2017), made in the form of modules with stiffeners and the presence of vertical grooves of a trapezoidal shape that allow you to connect the modules to each other using connecting inserts, which allows you to quickly construct slope protection.

The disadvantage of this design is the presence of the bottom of the modules, which will not allow the installation of the structure in a trench with a pipeline.

Known canopies (shelter, tent) for welding, which serve to protect the welder and the welded joint from precipitation. Basically, canopies have a frame structure made of metal tubes or profiles and an awning mounted on the frame. The disadvantages of these designs are the low installation speed.

The closest is a device for fastening the walls of trenches, containing enclosing shields, crisscross struts, pivotally connected in the center, the upper ends of the struts are made with hinge fastening, and the lower ends of the struts are made with the possibility of fastening and detachment using pins passing through the corresponding holes (ed. St. SU No. 1296688, published 03/15/1987). The device contains a formwork frame, equipped with combined struts with the possibility of adjusting its internal dimensions, while the upper and subsequent lower struts are made telescopic and installed between the support posts in their upper part, and are rigidly fixed to them at one end and pivotally at the other. Holes are made on the support posts, the support posts are connected by crossing struts, pivotally connected in the center, the upper ends are pivotally fastened to the support posts, and the lower ends are attached using pins passing through the corresponding holes in the support posts with the possibility of their vertical movement along the racks, if necessary. adjusting the internal dimensions of the frames for various diameters of the pipeline being laid. The device is equipped with folding fencing shields, folding fencing shield expansion mechanisms made in the form of hinged flat expansion lever systems, including rods, additional rods and rods, located outside the support posts and having tension locks and clamps. The support posts are made in the form of hollow guides with slots in which the ends of the additional rods are installed, while the mechanism for spreading the fencing shields is made in the form of rods installed in the cavity of the support posts, pivotally connected to the ends of the additional rods and made with a number of holes and teeth in their upper parts for interaction with clamps.

The disadvantages of the known device are

- firstly, the low efficiency of using the device due to the complexity of the design during manufacture, as well as the high duration of assembly of the device for fixing the trench and dismantling, as it includes many structural elements (frame, combined telescopic struts, mechanisms for spreading folding fencing shields, made in the form of hinged flat spacer lever systems, including rods, additional rods and rods located outside the support posts and having tension locks, clamps, etc.), and the lack of fastening of the enclosing shields by the frame, leading to a possible distortion of the shield;

- secondly, a narrow scope due to the lack of a canopy that ensures the work of the welder in all weather conditions, and a rigidly installed ladder;

- thirdly, additional costs associated with the involvement of specialized equipment for the transportation of the device;

- fourthly, high metal consumption;

- fifthly, unfavorable working conditions and safety of workers due to the lack of flooring.

The technical objectives of the invention are to increase the efficiency, increase the reliability and strength of the design of fencing shields, reduce the metal consumption, labor intensity and duration of assembly and disassembly of the device for fastening the walls of trenches for welding, expanding the technological capabilities of the device, ensuring the performance of welding and installation work in all weather conditions, saving material costs and improving the safety and work culture of employees.

Technical problems are solved by folding the trench with a canopy for welding, containing fencing panels, crossing struts, pivotally connected in the center, the upper ends of the struts are hinged, and the lower ends of the struts are made with the possibility of fastening and detachment using pins passing through the corresponding holes .

What is new is that the surface of the fencing shields along the contour is rigidly connected to the metal corners that form the frame, on the metal corners of the side surface of the fencing shields, holes are made along the entire length to ensure the reinstallation of the spacers depending on the configuration of the trench, the metal corners of the lower end surface of the fencing shields are hinged with floorings providing isolation of workers from the soil and moisture of the trench bottom, a metal ladder is rigidly installed on the inner side of the fencing shield, a drum with a fabric canopy is rigidly installed on the metal corner of the upper end of one fencing shield, a crossbar is rigidly installed on the metal corner of the upper end of the second fencing shield, providing tension and fastening of the fabric canopy, mounting loops are located on the upper part of the shields.

Also new is that the walls of the protective shields are made of steel sheet material or boards.

In FIG. 1 shows a general view of a folding trench mount with a canopy for welding .

In FIG. 2 shows a top view of a folding trench mount with a canopy for welding.

In FIG. 3 shows a folding trench mount with a folded welding canopy.

A folding trench fastening with a canopy for welding operations contains fencing shields 1, cross struts 2 pivotally connected in the center, the upper ends of the struts are hinged, the lower ends of the struts are made with the possibility of fastening and detachment using pins 3 passing through the corresponding holes 4. Spacers are made of a profile pipe 40x20x3 mm or 40x25x3 mm. The surface of the fencing shields along the contour is rigidly fixed with metal corners 5 with a shelf width of 45 to 70 mm, forming the frame of the fencing shields. The frame of the fencing shields eliminates the possibility of bending or warping of the shield surface, ensures tight pressing of the fencing shields to the slope of the trench. On the metal corners of the side surface of the fencing shields, holes 4 are made along the entire length, with a diameter of 20 to 40 mm with a distance between the holes from 300 to 500 mm, providing reinstallation of spacers 2 depending on the configuration of the trench. The metal corners of the lower end surface of the protective shields are pivotally connected to the floorings 6, which provide isolation of workers from the soil and moisture of the trench bottom. The flooring is made of angle steel with a shelf width of 35 to 63 mm, which acts as a flooring frame and boards bolted to the flooring frame. On the inner side of the enclosing shield, a ladder 7 is rigidly installed, welded from round steel with a diameter of 16 to 20 mm. The ladder is fastened to the shield frame in the upper part by welding, in the middle of the shield it is made by threaded connection. A drum with a fabric canopy 8 is rigidly mounted on the metal corner of the upper end of one enclosing shield. The drum body is mounted on roller bearings to the drum shaft, the drum shaft is rigidly fixed to the shield frame by welding or bolting. The width of the canopy provides overlapping of the welder's working area. On the metal corner of the upper end of the second fencing shield, a crossbar 9 made of round steel with a diameter of 16 to 20 mm is rigidly installed, which provides tension to the fabric canopy. For tension, the canvas of the canopy is passed through the space between the crossbar and the shield and attached to the shield. For fastening, a fold of the canopy web was made at the beginning of the web, made with a seam with polyester threads, a loop of round steel with a diameter of 3-5 mm was installed in the fold cavity. The canopy is attached to the shield by fixing the loop to the hooks on the shield, and the hooks are installed along the height of the shield in three horizontal rows to select the optimal tension depending on the size of the trench. Hooks are attached to the shield with a threaded connection. Mounting steel hinges 10 are located on the upper part of the shields, with a rod diameter of 16 to 20 mm and are rigidly fixed to the corner of the frame by welding.

Also new is that the walls of the protective shields are made of sheet steel 2-3 mm thick or boards 30-40 mm thick. The fastening of sheet steel to the metal corners of the shield frame is carried out by welding, the boards are fastened with a bolted connection.

Foldable trench fastening with a canopy for welding increases the efficiency of welding in the field by improving the quality of fastening the trench and the stability of the fencing shields, simplifying the assembly of the device while reducing metal consumption, labor intensity and duration of assembly and disassembly of the device for fastening the walls of trenches for welding, while simplifying the manufacture of the device, and also expands the technological capabilities of the device, ensuring the performance of welding and installation work in all weather conditions due to a canopy, ensuring safe descent into the trench and climbing a rigidly installed ladder, increasing favorable working conditions and safety of workers by installing a deck, saves material costs and improves the safety and work culture of employees.

The device works as follows.

Folding trench fastening with a canopy for welding is made in workshop conditions. Blanks are cut off for frames of fencing shields and floorings from angle steel and two frames are welded. Holes for hinges and pins are drilled at the four corners. Sheet steel is welded to the shield frame or boards are bolted. A ladder is rigidly installed on the frame, mounting steel hinges are welded. A drum with a canopy is installed on one of the shields, a crossbar is welded on the other and hooks are installed to tension the fabric of the canopy. Boards are rigidly attached to the frame of the flooring, then the flooring is connected with the body of the fencing shields with the help of hinges. Spacers are attached to the ends of the fencing shields in the upper part with the help of hinges. Fencing shields are hung on mounting loops with the help of a crane-beam and a traverse, in this position the hinge is installed on the spacers at the intersection. In this position, the device is loaded into the car body.

The device is unloaded using a four-branch sling and a crane-manipulator of the welding unit and lowered into the trench, the required distance between the floorings is set, the fencing shields are moved apart according to the size of the trench and the spacers are fixed to the fencing shields with pins. If it is necessary to protect against precipitation, the canopy canopy is stretched and fixed. Disassembly of the device is carried out in reverse order.

The proposed folding fastening of the walls of trenches for welding increases the efficiency of using the device due to the simplicity of the design during manufacture, reducing the assembly and disassembly time of the device for fastening the trench and dismantling, increasing the reliability and strength of the design of fencing shields, expands the technological possibilities of application by installing a canopy, stairs and flooring, reduces the costs associated with the involvement of specialized equipment for the transportation of the device, reduces the intensity of metal.

Claims (2)

1. A folding trench mount with a canopy for welding, containing fencing shields, criss-cross struts pivotally connected in the center, the upper ends of the struts are hinged, and the lower ends of the struts are made with the possibility of fastening and detachment using pins passing through the corresponding holes, characterized in that the surface of the fencing shields along the contour is rigidly connected to the metal corners that form the frame, holes are made on the metal corners of the side surface of the fencing shields along the entire length, ensuring the reinstallation of the spacers depending on the configuration of the trench, the metal corners of the lower end surface of the fencing shields are hinged to floorings that provide insulation of workers from the soil and moisture of the trench bottom, a metal ladder is rigidly installed on the inside of the fencing shield, a drum with a fabric canopy is rigidly installed on the metal corner of the upper end of one fencing shield, at the metal corner of the upper end of the second fencing shield, a crossbar is rigidly installed, providing tension and fastening of the fabric canopy, mounting loops are located on the upper part of the shields. 2. Foldable trench fastening with a canopy for welding according to claim 1, characterized in that the walls of the enclosing shields are made of steel sheet material or boards.

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