RU2091587C1 - Device for formation of shotcrete support - Google Patents

Abstract

FIELD: mining; applicable in mine workings for formation of light supports based on shotcrete. SUBSTANCE: the offered device includes shotcreting machine 1 installed on platform 2, manipulators 4 with nozzle system, main line for supply of concrete-air mixture. Each nozzle is secured to bushing which is fitted on bar 5 for axial motion. Installed on bar 5 between bushings are calibrated washers with cutout corresponding to bar thickness. Bushings are locked by locking strip whose length corresponding to bar length to point of its fastening to manipulators. Each nozzle has individual supply of concrete-air mixture. EFFECT: higher efficiency. 4 dwg

Description

 The invention relates to mining and can be used in mines for the construction of lightweight roof supports based on spray concrete.

 A device for the construction of spray concrete supports [1] The device includes a spray concrete machine, concrete, nozzle for applying concrete mixture.

 The disadvantage of this device is that the nozzle is controlled manually. In addition, the area of the working surface of the mine is limited, which depends on the parameters of the nozzle.

 As a prototype, a device for the construction of spray concrete supports [2] was selected. The device includes a spray concrete machine, a concrete conduit, a manipulator. The manipulator is equipped with additional nozzles and is made in the form of a bent pipeline, and a monorail is installed on the permanent lining with the possibility of interaction with the manipulator by means of a trolley.

 A disadvantage of the known device is that the distance between the nozzle and the working surface is practically not adjustable depending on the contour of its cross section and profile.

 The aim of the invention is to increase the efficiency of the construction of spray concrete lining.

 This goal is achieved by the fact that the spray concrete support device includes a spray concrete machine mounted on the platform, manipulators with a nozzle system, a concrete conduit and an air supply line. The device is equipped with bushings mounted on the rod with the possibility of axial movement along it and calibrated washers placed between the bushings and made with a retaining plate and a cutout for it. The locking bar has a length equal to the length of the rod to the place of its attachment to the manipulator. Each nozzle is fixed on the sleeve and has an individual supply of concrete-air mixture.

 In FIG. 1 shows the proposed device; in FIG. 2 bar connecting manipulators; in FIG. 3, section AA in FIG. 2; in FIG. 4 - calibrated washer.

 The device for erecting spray concrete support includes a spray concrete machine 1 connected to the platform 2. On the platform 2, telescopic arms 4 are mounted on the hinges 3, which are connected in the upper part by the rod 5. The sleeves 6 are attached to the rod 5, to which the nozzles are fixed 7. Between the bushings 6 calibrated washers 8 are installed on the rod 5, equipped with a cutout corresponding to the thickness of the rod 5. The washers are fixed by a bar 9, which has a length equal to the distance between the manipulators 4. The concrete-air mixture is supplied along langam 10 to each nozzle 7 individually.

 The device operates as follows.

 Spray concrete machine 1 installed on the platform 2 is moved to the place of construction of the lining. The manipulators 4 bring the nozzle closer to the surface of the output at a given distance. The concrete-air mixture through pipelines 10 enters each nozzle 7 individually on the surface of the mine. When changing the diameter of the nozzle 7 or its design, the distance between the nozzles 7 is changed either upward or downward. To do this, pull the locking bar 9 and remove the required number of calibrated washers 9, rearranging them to the edges of the rod 5 to which they were fixed. After removing the washers 8, the bushings 6 with the nozzles 7 fixed to them are moved along the rod 5 to the required distance, the retaining plate 9 is installed and the concrete support is erected.

 Analytical and laboratory studies show that the inventive device is simple, technologically advanced and does not require a bulky tool to adjust the distance between the nozzles depending on the granulometric composition of the fillers of the monolithic mixture in the mining conditions for the construction of the lining.

Sources of information
1. Streltsov EV and others. Fortified mine workings of coal mines with sprayed concrete. M. Nedra, 1978, p. 207 210.

 2. Copyright certificate of the USSR N 885563 class. E 21 D 11/00, 1980.

Claims (1)

 A device for erecting spray concrete support, including a spray concrete machine mounted on a platform, manipulators with a nozzle system, a concrete conduit and an air supply line, characterized in that, in order to increase the efficiency of erection of spray concrete support, it is equipped with bushings mounted on the bar with the possibility of axial movement along it and calibrated washers placed between the bushings and made with a retainer plate and a cutout for it, while the retainer plate has a length equal to the length of the rod to the place e mounting on the robot arm, wherein each nozzle is secured to the sleeve and has an individual inlet betonovozdushnoy mixture.

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