Executive tool of driving shield

FIELD: mining industry.

SUBSTANCE: device has frontal, two side and two conical working tools with rock-destroying tools on outer surfaces, drives, rigidly connected to axes of each working tool, and displacement mechanism, connected to guides, placed at angle relatively to each other, which angle is determined from mathematical expression. Frontal and each of side working tools are made in form of two rotation bodies, having arced forming lines with given value of convexity. Axes of frontal working tool and axes of two conical working tools are rigidly connected to guides, axes of upper rotation body of frontal working tool being displaced relatively to axis of its lower rotation body towards pit-face, and axes of each pair of side working tools are jointly connected to each other and to guides. Frontal working tool may be made in form of several modules.

EFFECT: higher efficiency.

2 cl, 4 dwg

 

The present invention relates to the mining industry, namely the tunneling shields, and can be used in tunneling transport and public utilities.

Known Executive body of the tunneling shield in the form of a table [1].

The disadvantage of this Executive body is the possibility of drilling a three-lane road tunnel with a circular cross section, the effective area of which is not more than 48%.

Known Executive body of the tunneling machine, comprising a front and two side working body, made in the form of three platters with rock cutting tools on the outer surface, the actuator being rigidly connected with the axes of each of the working body, and a transfer mechanism [2]. The construction of the tunnel mechanized shield complex with this Executive body is in fact three pairs of parallel tunnel. This solution is taken as a prototype.

The disadvantage of this device is the presence of imperfect breed in the arch and reverse the arch of the tunnel at the intersection of the circles, which necessitates the installation of girders and columns, and therefore complicates the technology. In addition, this Executive authority shall ensure that the construction of the tunnel with three lanes of traffic among the STV.

The objective of the invention is the provision of tunneling with the optimal shape of its cross section at a lower cost to develop the breed, as well as the possibility of building a four-, three-, two - and single-lane tunnels.

This is achieved by the fact that the Executive authority of the tunneling machine, comprising a front working body and two lateral working body with the rock cutting tools on the outer surfaces of the working bodies, actuators rigidly United with the axes of each of the working body, and a transfer mechanism, provided with two conical working bodies and the associated mechanism for moving guides, and the front and each side of the working bodies are made in the form of two rotating bodies having arcuate form with a given value of convexity, and the front axle of the working body and the axis of the two conical working bodies rigidly connected with the guide, the axis of the upper body rotation front of the working body offset from the axis of the lower body rotation in the direction of the face and the axis of each pair of the side of the working bodies pivotally connected with each other and with the guides, while the guides are positioned relative to each other at an angle, defined from the expression

tg=λ/L,

where λ - permissible distance from the shield to the circuit output,

L - maximum value for odci.

In addition, the front working the body in the form of several modules.

In figure 1, figure 2 shows the front view and side view of the Executive body of the shield.

Figure 3, 4 show longitudinal sections of one of the front and one side of the working bodies.

The Executive body of the tunneling shield consists of a front and two side working bodies 1 and 2, each of which is made in the form of two rotating bodies with arcuate form with a given value of convexity, two conical working bodies 3, dorabatyvalsya breed behind the front working body, a drive for each of the working body and the transfer mechanism. On the outer surface of the working bodies of the fixed Portorosa tools: milling cutter 4, the cutters 5 and scrapers 6. When drilling in hard rocks front working bodies equipped with milling cutters, side and working bodies - retractable cones, rocks average strength - bits and cutters, and in weak rocks scrapers. Axes 7, 8 of the front of the working body 1 and the axis 9 of the conical bodies 3 are rigidly connected to the guide 10 and the axle 11, 12 of the side of the working bodies of 2 of each pair are pivotally connected with each other and with the guides 10, arranged at an angle relative to each other (see figure 1, 2). While the axis 7 of the upper body rotation front of the working body is displaced relative to the axis 8 it is inego body rotation in the direction of the face. Front working body is made of several modules, each length of which corresponds to the width of the traffic lanes, i.e. equal to 4 meters. Figure 3 shows one of the front working bodies of the four modules (I, II, III, IV), and, starting from the second module consists of two parts. Working bodies tunneling machine equipped with multiple actuators depending on geological conditions. Figure 3 shows five drives for one of the front body, and figure 4 - four wheel drive to one of the side of the working bodies. Each actuator consists of several hydraulic motors 13, evenly spaced around the circumference of the inside of the working body and rigidly connected with its axis by means of rods 14, interconnected by additional cores 15 and gears 16, the shafts through which the leading sprocket 17 is connected with a circular toothed rack 18, rigidly connected with the inner surface of the working body. Each working body is mounted on two bearings 19 and 20, the first of which has a larger diameter for the passage of operating personnel. The Executive organ is the partition 21 with the Windows 22, overlapping gates (not shown), and the partition wall 23 with multiple Windows (not shown) for outputting the rocks in the tunnel. These partitions with the shell 24 of the shield form the camera. The mechanism changes the value of the tool on the bottom consists of a hydraulic Jack 25, installed in the bearing oval 26 rigidly connected to the shell 24. Submission of the Executive body for the slaughter carried out also when the shield advancing through the shield jacks 27.

The Executive body works as follows.

When the tunneling top and reverse its vaults form a front working body 1 and the side - lateral working units 2. At the same time turn actuators of the Executive body and then submit it to the bottom by means of hydraulic jacks 25. Destroyed the breed in the working area when the tunnel excavation in unstable rocks creates a counterweight to the slaughter, providing natural gidrokabina in developing mountain massif. When reducing the pressure of the weights in the process of work of the Executive body move it to the bottom panel jacks 27. When drilling in hard rocks of the weights is not required and breed continuously into the chamber. Submission on the working face of the working bodies in such conditions is carried out by hydraulic cylinders 25. The magnitude of zagadki Executive body depends on the stability of the array and ranges from 200 to 700 mm In the process of submission to the Executive body at the bottom by means of hydraulic jacks 25 and the guide 10, the distance between the axes of the front body and the angle between the axes of the side of the working bodies of each pair increases, because the guides are located is received at a certain angle relative to each other. The magnitude of this angle is determined from the expression

tgα=λ/L, where

λ - allowable distance from the shield to the circuit of production;

L - maximum zagadki.

Currently, according to the international standards λ=50...100 mm, the Maximum value of the angle α 4.5°. This Executive body allows you to build a four-lane road tunnel. The length of the upper front element of the working body is equal to 13.2 m and weight is 12 t, the lower element respectively 15.1 m and 13.5 t and each side respectively 5.5 m and 5 so the height of the tunnel is equal to 11 m, width 20 m, which corresponds to the requirements of international standards. When the values of convexity forming the front of the working body, equal to 3.0 and 2.4 m for the roof and back of the arch, and the magnitude of the convexity equal to 0.6 m for forming the side of the working bodies, the excavation contour is oval in shape with optimal cross-section. To ensure the penetration rate of 20 m/day (500 m/month.) the drive power of the Executive body must be equal to 6600 kW, and the number of hydraulic motors with gearboxes can be chosen according to their capacity. This design also allows you to build three-, two-, one-lane road tunnels by removing the Central module I and module II, III, consisting of two parts. Thus, this and the additional body allows to reduce the costs of developing the breed is not less than 30% due to the optimal cross-section generation. During operation of the Executive authority necessary to carry out technical inspection. Pass attendants possible through the guide 10 having a diameter of 2.0 m, and the bearing 19 with a diameter of about 2.0 m inside front and side of the working bodies.

Sources of information taken into account when preparing the description of the invention

1. Auerbach V.M. magazine “the Underground world”, No. 3, 2000, Moscow, “Timra”, pages 36-37.

2. Vlasov, S., Garber V.A., Merkin V.E., journal of Underground space in the world, No. 5, 1996, Moscow, “Timra”, pages 3-12.

1. The Executive body of the tunneling machine, comprising a front and two side working body with the rock cutting tools on the outer surfaces of the working bodies, actuators rigidly United with the axes of each of the working body, and a transfer mechanism, characterized in that it is provided with two conical working bodies and the associated mechanism for moving guides, and the front and each side of the working bodies are made in the form of two rotating bodies having arcuate form with a given value of convexity, and the front axle of the working body and the axis of the two conical working bodies rigidly connected with the guide, the axis of the upper body rotation front of the working body is offset the axis of the lower body rotation is in the direction of the face, and the axis of each pair of the side of the working bodies pivotally connected with each other and with the guides, while the guides are positioned relative to each other at an angle, defined from the expression

tg=λ/L,

where λ - allowable distance from the shield to the circuit output,

L - maximum zagadki.

2. The Executive body of the tunneling machine according to claim 1, characterized in that the front working the body in the form of several modules.



 

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