Tunnel shield

FIELD: underground building, particularly tunnel shields used to drive tunnels of square cross-sections.

SUBSTANCE: device has body of square cross-section with rounded corners and ground excavation unit made as rotor with cutting members connected to end and cylindrical surfaces thereof. Device also has cutting members made as inserted blades secured in corners of end body surface and inclined walls, which are arranged between body and partition.

EFFECT: simplified structure and increased operational reliability.

3 dwg

 

The invention relates to the field of underground construction, namely, the tunneling shields, and can be used in the construction of the tunnel of rectangular cross-section for different purposes with different types of soil.

Known for the design of tunnel shield, intended for the construction of tunnels of noncircular cross section, comprising a housing, a node for sampling of soil, provided with a main rotor with cutting elements on the end faces of the rotor, additional rotor of smaller diameter located below the horizontal axis of the main rotor and cutting knives associated with the hydraulic cylinders to ensure that they move (patent EP No. 0456824 A1 in class. E 21 D 9/06 from 23.08.90 year).

The disadvantage of this device is the design complexity due to the presence of a large number of rotary elements and scoring knives, each of which is equipped with its own drive. In addition, for the construction of the tunnel of rectangular or square section require additional restructuring of the rotor assemblies.

The closest technical solution of the essential features is the tunneling shield, described in the patent EP No. 0384065 B1 through class E 21 D 9/06.

Tunnel shield includes a housing square section with rounded corners with a partition separating the bottom-hole zone from C is by placing staff, site to select the soil in the form of a rotor with cutting elements on its end surface of the cutting and scoring elements.

The construction of this tunnel shield complex contains a large number of additional small rotors with individual actuators a predetermined program, which also leads to decrease in the reliability of the device as a whole.

Task to be solved by the claimed invention is directed, is to simplify the design and increase the reliability of the device.

The problem is solved due to the fact that the tunneling shield includes a housing square section with rounded corners and partition separating the bottom-hole zone from a zone of the operating staff, the site for a sample of the soil in the form of a rotor with cutting elements on its end surface of the cutting and scoring elements with additional cutting elements placed on the cylindrical surface of the rotor, and scoring elements in the form attached at the corners of the end surface of the shell cutter inserts and tapered walls placed between the casing and the partition.

Figure 1 shows the head part of the tunnel shield.

Figure 2 - a view B figure 1.

Figure 3 - cross section a-a in figure 2.

Tunnel shield includes a housing square section with sucrogen the mi angles 1, partition 2 separating the bottom-hole zone from a zone for staff, site for a sample of the soil in the form of the rotor 3 with zaborniak 4. On the end surface of the rotor and on its cylindrical surface placed cutting elements 5. Cutting elements posted on sabunike 4.

On the corners of the end surface of the housing 1 is fixed cutting elements in the form of knife inserts 6 and the inclined wall 7 disposed between the housing 1 and partition 2. On the inclined wall 7 is fixed pipe section 8 is hermetically secured from the service area staff flange 9.

The device operates as follows :

When moving the tunneling shield with hydraulic jacks (on the drawing conventionally not shown) and the rotation of the rotor 3 is destroyed and sampling of soil using the cutting elements placed on the end and cylindrical surfaces of the rotor and on the surface of sabunike. This is achieved by the formation of circular cross-section of the tunnel.

When moving the shield is also pressing knife inserts 6 in conjunction with an inclined wall 7 into the soil, which leads to the shedding ground in the corners of the end surface of the body and removal of soil for the destruction in the area of the cutting elements placed on the cylindrical surface of the rotor.

Thus, the use of a rotor with cutting elements on its tor is eve and cylindrical surfaces and knife inserts with inclined sides, allows you to build a tunnel of rectangular shape. At cutting corners does not require additional energy to work with cutting elements. In this case, energy is used to move the tunneling shield, which ultimately simplifies the design of the device and increases its reliability.

In the case when there is clogging the soil site in the critical zone, which prevents its removal from this area, you are punching it through the pipe 8, the first opening flange 9.

Tunnel shield, containing the body of square cross section with rounded corners with a partition separating the bottom-hole zone from a zone of the operating staff, the site for a sample of the soil in the form of a rotor with cutting elements on its end surface of the cutting elements, characterized in that it is provided with an additional cutting elements on the cylindrical surface of the rotor, and scoring elements in the form attached at the corners of the end surface of the shell cutter inserts and tapered walls placed between the casing and the partition.



 

Same patents:

FIELD: mining industry.

SUBSTANCE: method includes expanding guiding pipeline by extracting soil from around it by driving shield with rotor working implement. Soil is extracted to value, surpassing needed outer diameter of shield cover. Forming ring-shaped space inside tunnel mine is compacted from back side and continuously filled with liquid. Concurrently sedimentation of extracted soil is drained from lower portion of face. Displacement of driving equipment relatively to guiding pipeline is performed along soft trajectory. Device has means for driving guiding pipeline and driving shield with rotor working implement. Rotor working implement is mounted on body of driving shield. Front surface of working implement with cutters extends beyond outer contour of shield cover, provided with back end compaction. Device is provided with fluid pump device. Force hose of pump is outputted from upward portion beyond outer contour of shield cover. Device for transporting extracted soil from face is made in form of suck-in hose connected to pump device and to lower portion of ring space beyond rotor working implement.

EFFECT: lower transverse loads on guiding pipeline.

2 cl, 1 dwg

FIELD: mining industry.

SUBSTANCE: method includes expanding guiding pipeline by extracting soil from around it by driving shield with rotor working implement. Soil is extracted to value, surpassing needed outer diameter of shield cover. Forming ring-shaped space inside tunnel mine is compacted from back side and continuously filled with liquid. Concurrently sedimentation of extracted soil is drained from lower portion of face. Displacement of driving equipment relatively to guiding pipeline is performed along soft trajectory. Device has means for driving guiding pipeline and driving shield with rotor working implement. Rotor working implement is mounted on body of driving shield. Front surface of working implement with cutters extends beyond outer contour of shield cover, provided with back end compaction. Device is provided with fluid pump device. Force hose of pump is outputted from upward portion beyond outer contour of shield cover. Device for transporting extracted soil from face is made in form of suck-in hose connected to pump device and to lower portion of ring space beyond rotor working implement.

EFFECT: lower transverse loads on guiding pipeline.

2 cl, 1 dwg

Tunnel shield // 2264538

FIELD: underground building, particularly tunnel shields used to drive tunnels of square cross-sections.

SUBSTANCE: device has body of square cross-section with rounded corners and ground excavation unit made as rotor with cutting members connected to end and cylindrical surfaces thereof. Device also has cutting members made as inserted blades secured in corners of end body surface and inclined walls, which are arranged between body and partition.

EFFECT: simplified structure and increased operational reliability.

3 dwg

FIELD: mining industry and construction, particularly to construct multipurpose tunnels, and tunneling rigs.

SUBSTANCE: method involves successive tunneling tunnel having variable cross-section and demounting tunneling rig. In going from tunnel section having one cross-section to that having another one the tunneling machine is reset by replacing tunnel profile forming members thereof in mounting chamber constructed in end of the first tunnel section so that the number of above members is constant. The rig comprises load-bearing body with air-tight membrane. Fastened to the body are shield shell composed of head and rear parts, shield hydraulic cylinders, cutting edge and multi-axis executive tool with driving modules. Executive tool housing is made as skeleton grid with rock cutting and mixing members. The grid is arranged in front of geometric diaphragm and is connected to outlet shafts of driving modules by means of crankshafts. Means for transporting cut rock from tunnel face and means for tunnel lining laying are arranged inside the shield shell. The rig has additional system comprising head and rear parts of shield shell, removable cutting edge and skeleton grid having outer cross-sectional outline different from that of similar primary members. Head part of sheet shield is composed of figured covering members in transversal cross-section. The covering members are fastened to load-bearing body along tunnel excavation contour.

EFFECT: possibility to construct tunnel having variable profile.

2 cl, 4 dwg

Full-face machine // 2324051

FIELD: mining; apparatus for making tunnels in underground mining of minerals.

SUBSTANCE: machine includes undercarriage representing a frame whereon caterpillar trucks are attached and trunnion axes of a working head gearbox together with a rotary working head, loading buckets, berm mills, cutting drums, gathering blades, conveyer and protection cowl mounted on supports of said frame. Hydraulic lift cylinders of the working head gearbox are attached to this frame, rods of said cylinders are attached to the working head housing and all rotating parts of said rods are set into bearings equipped with a force lubrication system. The lubrication system includes pump, pressure pipeline, manifolds and system of distribution tubes leading to gear shaft bearings of the gearbox. The undercarriage frame has two tightly closed cavities, wherein a pressure line between the pump and manifolds is positioned being made in the form of coils. Both cavities of the frame are filled with cooling fluid.

EFFECT: cooling of lubricating fluid within the lubrication system; increasing the life of gear shaft bearings of the machine gearbox; decreasing the ambient air temperature; enhancement of working conditions for the operating staff.

4 dwg

Full-face machine // 2324052

FIELD: mining; apparatus for making arched tunnels in underground mining of minerals.

SUBSTANCE: machine includes frame whereon an undercarriage and working element drive gearbox are mounted together with a rotary working head being attached to output shafts of said gearbox. The working head consists of borer, pitching borer, cross element, each end of its arms having a loading bucket with a bottom and sidewalls, and conveyer. The front face bottoms of two loading buckets positioned on opposite arms of said cross element are slopped forward with respect to the machine displacement vector, and those of the other buckets - slopped backward with respect to the same vector.

EFFECT: cleaning-up with the full engagement of the bucket cross-section area; reduction of impact loads for the cross element; reduction of heating and increased wear of the bearings in the working head drive gearbox of the machine.

7 dwg

FIELD: mining.

SUBSTANCE: invention refers to mining industry, namely to driving shields, and may be used during building of highway, railway and public tunnels. Operating member of driving shield includes centre rotor working organ in the form of faceplate, working organs with rock-breaking tools on outer surface for creation of oval form of tunnel section, actuating device of working organs and traveling mechanism. In order to create oval form of tunnel section, working organs are designed as two side and two vertical working organs of drum-type. Each side working organ is designed in the form of body of revolution arranged in relation to cross centroidal principal axis of tunnel section, with bow-shaped element corresponding to arch, half of side arches and perimetres of their connection. End surfaces of vertical working organs of drum-type correspond to arch and floor arch of tunnel. Central working organ is installed by means of bearing on axis located in centre of gravity of driving shield, this axis is also operating member guide. At that side working organs and vertical working organs are installed by means of bearings on their axes rigidly cantilever connected to guide. At that each of mentioned working organs is provided with actuating device, and traveling mechanism is designed in the form of hydraulic jacks.

EFFECT: providing of driving of tunnel of optimal oval shape transverse and establishing of conditions for maximum mechanisation and automation of all operating processes during tunnel building.

5 dwg

FIELD: mining.

SUBSTANCE: actuator of a tunnel shield with oval shape comprises a central rotor tool, two horizontal side tools and two vertical drum tools. The actuator is telescopically connected to a shield shell along centres of rotation of side and vertical tools, and also via a square opening in a tight partition along the centre of gravity with oval section and a square guide passing through it.

EFFECT: invention provides for correction of shield shell position and position of tunnel section as direction of tools rotation changes.

5 dwg

FIELD: mining.

SUBSTANCE: device for formation of tunnels contains cutting head provided with electric or hydraulic motor, mechanism for cutting head actuation, hydraulic mechanism connected to cutting head and designed with possibility of pushing of cutting heads towards the end of tunnel during material removal and supporting structure for support of previously formed part of tunnel. Supporting structure is designed so that to provide support on the tunnel surface both during stop and movement along the tunnel. Cutting head is designed with possibility to move independent of supporting structure. Besides the device has a conveyor for transportation of removed material from cutting head to the place distant from the cutting head during formation of part of tunnel. Also the method of tunnel formation using this device is proposed.

EFFECT: reducing time for tunnel driving.

31 cl, 4 dwg

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