Shield

 

The invention relates to mining and can be used in mechanized mount Stopes in underground mining. The objective of the invention is the provision of reducing the height of the bases and the expansion of the range of application of the lining on the power of layers, increasing its reliability. The shield includes hydraulic jacks, two grounds, between which is placed the transfer mechanism, the fence, set the hinge on the overlap and the associated bases by at least two pairs of levers, each of which levers are placed symmetrically about the plane of symmetry of the section and hinged to the fence and grounds. Leverage one of the pairs are connected by thrust, the ends of which are pivotally connected to these levers. The axis of the hinge links of the thrust levers can pass through the common axis of the hinge mounting of these levers to the fence. 1 C.p. f-crystals, 4 Il.

The invention relates to mining, namely, mechanized mount Stopes in underground mining.

Famous shield, including the hydraulic jacks, two grounds, between there through, at least two pairs of levers, each of which levers are placed symmetrically about the plane of symmetry of the section and hinged to the fence and grounds. With goaf side of the transfer mechanism installed thrust, the hinge connecting the base to each other (the application of Germany OS 3400771. Publication 18.07.85. Priority 12.1.84).

All signs are similar, except for the swivel bases in avalanche zone thrust, coincide with features of the invention.

Swivel bases in the dammed part by means of thrust in cooperation with communication in their face portion provides a constant distance between the bases. This is due to the kinematic requirements and force structure stability of the shields, and the operation of the transfer mechanism placed between the bases.

The disadvantages of the design is that the location of the traction connecting the reasons behind the transfer mechanism limits the stroke of the moving section. Moreover, this limitation is particularly negative impact in the design of modern single-row two-column supports, with a relatively short base. At the specified location of the thrust in these sectioi effort divergence hydraulic cylinder movement. Instead, the shifting section is performed when folding hydraulic cylinder displacement, resulting in reduced effort shifting in 1,5-1,7 times (see, for example, the Support is the Best 055/15-Oz. Operation manual". , in Gorlice (Poland), 1998 - s.).

In addition, to ensure the necessary mutual displacement of the bases vertically (so-called "otaplivanie" bases relative to each other, the connection of the bases through the thrust provided samirnet in two planes. This is because when otaplivanie" the Foundation of the associated levers with the fence, make a plane-parallel movement, in which, in addition to displacement, there is also mutual reversal. The need for dual hinge in connection basis complicates its design, respectively, reducing the reliability.

Closest to the invention to the technical essence and the achieved result is a shield that includes hydraulic jacks, two grounds, between which is placed the transfer mechanism, the fence, set the hinge on the overlap and the associated bases by at least two pairs of levers, each of which levers are placed symmetrically with respect to blockley zone thrust with a double hinge, above the transfer mechanism (see Complex treatment KMC-500 TONS. Manual CMCT.00.00.000 re. JSC PNII, Russia, 1996. - S.).

All the characteristics of the prototype, except for the connection of the bases in the dammed part of the thrust with a double hinge, coincide with features of the invention.

In comparison with similar traction with double hinge provides greater freedom of movement ("otaplivanie") bases relative to each other. Placing traction on the transfer mechanism can not limit its progress and to use structural diagram of the shields, in which the shifting is effected by the force of the spreading of the hydraulic cylinder moving.

The shortcoming of the prototype is the high grounds, due to the need of vertical clearance between the thrust and the transfer mechanism engaged in the process, supports the reciprocating movement relative to the rod. Note that the magnitude of the clearance is determined by considering the possible subsidence of foundations in soil and "ascent" of the mechanism for moving coal and rock rubble. The lack of clearance can cause failure and damage to the mechanism or thrust. At the same time increasing the height of the bases su the shM the disadvantage of the prototype is the complexity and lack of reliability of design thrust with a double hinge. Rod placed between the bases, is connected to one of the grounds through a hinge with a vertical axis, and the other hinge with a horizontal axis. As a consequence, the mutual displacement of the bases vertically limited by the hinge with a vertical axis and a horizontal offset - hinge with a horizontal axis. In this case the axis of the mounting arms to the base, on which is placed swivel rod with grounds not provide additional isolation, because after a short period of operation in the mine conditions under high loads them twist in the holes of the substrate becomes almost impossible.

The basis of the invention the goal is to create sections of powered roof supports, in which by changing the design and nature of the relationships between the nodes section, placed on both sides of its plane of symmetry is ensured by reducing the height of the bases and the expansion of the range of application of the lining capacity of reservoirs, as well as improving the reliability of connections between nodes section and, accordingly, the reliability of the shields in General.

The problem is solved due to the fact that in the section of powered roof supports, including hydrostone and related grounds by, at least two pairs of levers, each of which levers are placed symmetrically about the plane of symmetry of the section and hinged to the fence and grounds, according to the invention, the levers of one of the pairs are connected by thrust, the ends of which are pivotally connected to these levers. In some cases, the execution section of the axis of the hinge links of the thrust levers pass through the axis of the hinge mounting of these levers to the fence.

The essential features of the invention: connecting one of the pairs of levers by means of thrust, the ends of which are pivotally connected to these levers (see, for example, Fig.1, 2). These signs, in collaboration with the known characteristics allow, while maintaining the dignity of the decision of the prototype, to increase the vertical clearance between the thrust and the transfer mechanism with the required minimum height of the base. This expands the range of use of the shields on the power of layers, reducing its minimum threshold. It should be noted that increasing the thickness of the levers, which are thrust, rotate, thereby increasing the clearance.

In addition, the installation of pull on the levers reduces in comparison with the prototype, relative to use of the ordinary swivel thrust levers instead of the double hinge. Thus, the increased reliability of links between the nodes section and, accordingly, the reliability of the shields in General.

Used in some cases, execution of the shields the location of the axis of the hinge links of the thrust levers so that it passes through the common axis of the hinge mounting of these levers to the fence allows for "otaplivanie" grounds (see, for example, Fig.4) to minimize the angular misalignment of thrust and places her grip on the levers. This increases the reliability of the connection between arm connected by a rod.

In Fig.1 shows an example execution of the shields according to the invention.

In Fig.2 shows the section a-a of Fig.1.

In Fig.3 shows the kinematic diagram of the shields of the prototype in position with the bases placed at different heights (when otaplivanie" basis), In Fig.4 shows the kinematic diagram of the shields according to the invention in position with the bases placed at different heights (when otaplivanie" grounds).

An example of executing sections of powered roof supports (see Fig.1, 2) includes the hydraulic jacks 1 and two base 2, between which is placed gidrotartrat 3 and the plunger 4 of the transfer mechanism. Fence 5, mounted pivotally on the cross is a rule about the plane of symmetry of the section. Each of the levers 7 provided with a hole 9 which contains the axis 10. The levers 7 are interconnected by means of thrust 11, the ends of which are pivotally connected to these levers through the axis 10.

The shield works as follows. In the transport position with the minimum dimensions of the section height (when fully folded section of the hydraulic jacks 1 are folded to the minimum size, gidrotartrat 3 complex, the pusher 4 is advanced. Fence 5, cover 6 and the rod 11 are in the lowest position. The clearance between the thrust 11 and the hydraulic cylinder 3 is minimal.

When spreading out the legs 1 overlap 6 and downhole edge of the fence 5 rise. The levers 7 are rotated in the hinge bases 2 and fencing 5. Rod 11 when this rises, thereby increasing the clearance between itself and the hydraulic cylinder 3. When planting section before the shifting of the hydraulic jacks 1 fold, overlap 6 and downhole edge of the fence 5 are omitted. The levers 7 are rotated by omitting the rod 11. However, section height as the height of thrust, more than when fully folded section. Thus, the clearance between the thrust 11 and the hydraulic cylinder 3 is greater than the minimum.

Moving sections of the support is carried out through razdvizhnaya 3 is ejected to the face. Rod 11 together with the section moves freely over the hydraulic cylinder 3 and the pusher 4 transfer mechanism.

When afloat or sinking into the soil of one base 2 (see kinematic diagram of Fig.4) corresponding lever 7 is rotated. Between the levers 7, is formed anglewith the top in the hinge fence 5, which is associated with the levers 7. Rod 11 is rotated around the axes 10, placed on different levers 7, compensating for this mutual offset S axis 10.

Improving the reliability of communication between the nodes section, placed on both sides of its plane of symmetry, in comparison with the prototype is determined by two factors (see Fig.3, 4). First, the offset amount S is smaller than the offset between the hinge mounting of the prototype Sp, located on the grounds. Secondly, the shaft 10 is displaced along the arc of a circle with the center in so and their position and orientation are not linked with the position of the bases, making plane-parallel motion.

The optimum conditions of communication between the levers are achieved with the implementation of the section with the location of the axis of the hinge links of the thrust levers so that they passed through the common axis of the hinge mounting of these levers to the fence (so in Fig.4). This Bulstrode spatial reversal thrust 11 in the hinge connections with her arms. While the spatial axis of rotation of the traction bar 11 in each of the hinged connections with her arms as close as possible to the axis of symmetry of this compound, determined by the axis 10. As a consequence, the magnitude of the required angular junction 11 thrust in its connection with the axle 10 is minimal. On the one hand, allows to minimize the gaps in the hinge links of the thrust levers, thereby ensuring maximum stability of the distance between the levers 7 and bases 2. On the other hand can virtually eliminate the likelihood of these relationships twisting loads, the axis of which does not coincide with the axis of the hinge connections, which increases the reliability of their work.

Claims

1. Shield, including the hydraulic jacks, two grounds, between which is placed the transfer mechanism, the fence, set the hinge on the overlap and the associated bases by at least two pairs of levers, each of which levers are placed symmetrically about the plane of symmetry of the section and hinged to the fence and grounds, characterized in that the arms of one of the pairs are connected by thrust, the ends of which are articulated swathi with levers pass through the common axis of the hinge mounting of these levers to the fence.

 

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FIELD: mining.

SUBSTANCE: facility for connecting sections of support with conveyor consists of bracket rigidly secured on linear section of conveyor and connected with support by means of vertical hinge; support in its turn is connected with vertical ribs of beam of powered roof support section by means of horizontal hinge; hydro-cartridge for control over linear section of conveyor in vertical plane is secured on face surface of support; plunger of hydro-cartridge interacts with beam of section of powered support; also run of hydro-cartridge for control over linear section of powered support in vertical plane exceeds value of support set-off relative to beam of section of support in vertical plane; facility also consists of share located on mining side of conveyor section. The horizontal hinge is connected with vertical ribs of the beam of the section of powered support by means of two coaxial slots made in vertical ribs; also each of slots in vertical plane on ends has rounding with chamfers, the top of the angle between which in each vertical slot is directed to support.

EFFECT: increased functionality of facility under conditions of dirtying due to less dirt ingress and due to self-cleaning capacity of slots during main process operations of facility.

5 dwg

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