SU920220A1 - Shield for driving mine workings - Google Patents

Description

(5) SHIPPING FOR MINING

I

The invention relates to the mining industry, namely to the construction of shields for the excavation of mine workings.

A well-known shield for excavation of mine workings, in the case of which the handle of the executive body l is fixed on the bracket.

The disadvantage of this shield is that the working body is fixed in the middle part of the shield, cluttering up its free space, which reduces its safety and operational efficiency.

The closest to the offer. the technical essence and the achieved effect is a shield for excavation, mine workings, including a housing with front and rear support rings, in the upper part of which a box-shaped bracket tM- is fastened, hinged to a trunnion, which is connected to the handle of the executive body with the ability to rotate it by means of tilt and pivot cylinders in the vertical and horizontal planes x.

The disadvantage of this shield is that the presence of a console arm located in the area of the block paver increases the length of the tool, making it difficult to assemble in the shield and reducing the free space in the shield shell and around the rear support ring. At the same time, in shields with a diameter of 2 m, the connection of the trunnion with the bracket arm through the tilt cylinders of the arm makes it difficult to secure the cutting

15 to the edge of the handle the necessary cutting effort, especially when working in soils of Group III-IV, and raising the handle to the upper position, since in this position it is significantly reduced

Claims (2)

20 shoulder forces raising the handle. In addition, the rigid fastening of the bracket in the upper part of the shield between its support rings makes it difficult to mount and adjust the position of the bracket, does not ensure that the fixing elements of the bracket accept the bending and torsional moments from the cutting forces at the end of the arm. The purpose of the invention is to increase the reliability of the shield. The goal is achieved by the fact that the bracket is attached to the housing by means of a hinge mounted on the rear support ring, and a threaded rod fixed to the front support ring, and provided with an internal partition passing through the axes of the hinges of the bracket and trunnion, and the trunnion is made with an additional lever , while the tilt cylinders of the handle are connected with this lever and hinged to the bracket on the side of the front support ring. In FIG. 1 shows the proposed shield, side view; in fig. 2 shows section A-A in FIG. one; in fig. 3 section bb in fig. 2. The shield for excavation of mine workings consists of a case 1c front 2 and rear 3 support rings, in the upper part of which a box-type bracket k is attached with a pin 5 pivotally mounted on it by means of a finger 6. Pin 5 of the executive body, ending swivel 8; The handle 7 is installed with the ability to move in a vertical plane around the axis of the finger 6 by means of tilt hydraulic cylinders 9 and in a horizontal plane around axis 10 by means of turning hydraulic cylinders 11. The bracket k, used simultaneously as an oil block, is hinged in the shield case 1 by means of a finger 12 and rez (abutment rod 13 with spherical nuts 1. Inside / bracket k is installed - a partition 15, located in a plane passing through the axes of the fingers 6 and 12. Trunnion 5 is made in the form of a two-armed lever ha covering the bracket k, while its free end 1b is directed upwards and has two cheeks that are connected to the hydraulic cylinders 9 of the inclination of the handle 7 hinged on the bracket 4 from the front support ring 2 . The shield housing 1 is fitted with shield jacks 17. The handle 7 is made telescopic and can be extended by means of a hydraulic cylinder 18. The shovel 8 is turned around the axle 19 by hydraulic cylinders 20. Removable horizontal platforms 21 and 22 are installed in the shield case 1. conveyor 23. The shield operates as follows: In loose soils, the bottom is held by horizontal platforms 21 and 22. When the shield is moved with the help of shield jacks 17, the soil is showered from horizontal platforms 21, 22 into a chute shield part. The handle 7 of the executive body, using a shovel 8, performs, if necessary, partial development of the walls in the cells between partitions, as well as loading the soil in the tray part of the shield onto the conveyor 23. In stable soils, platforms 21, 22 are dismantled and the executive body develops the soil all slaughter. The hand is moved up and down, left and right and back and forth using hydraulic cylinders 9, 11, 18. The active cutting force on a shovel 8 is created by means of a hydraulic cylinder 20 turning the shovel 8. In this case, in the hydraulic cylinders 9 tilt and threading 13 of the bracket k, reactive loads are perceived, which are perceived by the housing 1. The torque that occurs when the shovel 8 digs; It is transmitted through the trunnion 5. The pallet 6, the partition 15 of the bracket and is perceived by the finger 12 securing the bracket k to the body 1 of the shield. When advancing the shield to the width of the block lining ring in the tail section of the shield, the next ring lining assembly is assembled. The invention allows to ensure the unambiguous choice of the design scheme of the executive body, and also allows, other things being equal (oil pressure in the hydraulic system, the size of the executive body, etc.) to increase the cutting force on the shovel, and consequently, the performance and reliability of the shield. The implementation of the bracket without the cantilever tilted towards the tail of the shield allows to expand the free space in the shield and thereby improve the working conditions of the drifters. The use of the proposed construction, for example, for the construction of municipal and industrial tunnels with a diameter of 2, allows for increasing the reliability of the shield and improving working conditions to increase the average construction speed of the tunnels. Claim Shield for excavation of mine workings, comprising a housing with front and rear support rings, in the upper part of which a box-type bracket is attached, hinged associated with a trunnion, which is connected to the arm of the executive body with the possibility of turning it by means of tilt and turn hydraulic cylinders in the vertical and horizontal planes, characterized in that 4to, in order to increase the reliability of the shield's 92 0 operation, the bracket is attached to the housing by means of a hinge mounted on the rear support ring and p zbovoy rod fixed to the front support ring and provided with an internal partition extending through the hinge axis and the trunnion bracket, and the pin is provided with an additional lever, the tilting cylinders handgrip pivotally coupled with the lever and articulated on. bracket from the front support ring. Sources of information taken into account in the examination 1. The German patent If 1279708, class, 19 f 3/02, published. 1968. 2. USSR author's certificate number 637725, cl. E 21 D 9 / On, 1976 (prototype).