Shaft hoisting plant having an overwind brake device

Abstract

A shaft hoisting plant has a conveyance and an overwind brake device for the conveyance, a travel path for the conveyance, and an overwind path adjoining a lower and/or upper end of the travel path. The overwind brake device includes retaining bars arranged in pairs in a manner spaced apart from one another and extending in a longitudinal direction, energy-absorbing material arranged in the form of plates arranged one above another in the longitudinal direction between the retaining bars. A plow is movable relative to the retaining elements, such that, upon overwinding of the conveyance, the plow deforms and/or destroys the energy-absorbing material between the retaining elements.

Claims

1. A shaft hoisting plant comprising: a conveyance, an overwind brake device for the conveyance, a travel path for the conveyance extending in a longitudinal direction, and an overwind path adjoining one of a lower end or an upper end of the travel path, wherein the overwind brake device comprises: a pair of retaining bars extending parallel to the longitudinal direction of the travel path, plates of energy-absorbing material arranged between the retaining bars, the plates being arranged one above another in the longitudinal direction between the retaining bars, and a plow movable relative to the retaining bars such that, upon overwinding of the conveyance, the plow at least one of deforms and destroys the plates of energy-absorbing material between the retaining bars, wherein either the plow is movable and the retaining bars are stationary on the overwind path or the plow is stationary on the overwind path and the retaining bars are movable.

2. The shaft hoisting plant as claimed in claim 1, wherein the plow is arranged on the conveyance.

3. The shaft hoisting plant as claimed in claim 1, wherein the retaining bars are arranged on the conveyance.

4. The shaft hoisting plant as claimed in claim 1, wherein the overwind brake device has a braking frame that is movable in the longitudinal direction and guided by a guide framework, said braking frame being set up to be contacted by and moved along the overwind path by the conveyance upon overwinding of the conveyance, the retaining bars are fastened to the guide framework, and the plow is arranged on the braking frame.

5. The shaft hoisting plant as claimed in claim 1, wherein the energy-absorbing material of the plates is a fiber composite material.

6. The shaft hoisting plant as claimed in claim 5, wherein the fiber composite material is a fiber-reinforced plastic.

7. The shaft hoisting plant as claimed in claim 5, wherein the fiber composite material is reinforced by at least one of inorganic fibers, organic fibers, and metallic fibers.

8. The shaft hoisting plant as claimed in claim 6, wherein the fiber-reinforced plastic is a continuous fiber-reinforced thermoplastic.

9. The shaft hoisting plant as claimed in claim 7, wherein the fiber-reinforced plastic is a continuous fiber-reinforced thermoplastic.

10. The shaft hoisting plant as claimed in claim 4, wherein the guide framework has vertical support girders, an upper brace, and a lower brace, each of the upper brace and the lower brace consisting of cross girders arranged between the support girders.

11. The shaft hoisting plant as claimed in claim 10, wherein at least two pairs of retaining bars are arranged on two first opposite sides of the guide framework, each of the retaining bars are fastened to the lower brace and the upper brace and extend parallel to the support girders between the upper brace and the lower brace.

12. The shaft hoisting plant as claimed in claim 11, wherein at least one guide profile on two second opposite sides of the guide framework is fastened to the lower brace and the upper brace and extends parallel to the support girders, and guide shoes engaging around the guide profiles are arranged on the braking frame, the guide shoes and guide profiles guiding the braking frame along the overwind path.

13. The shaft hoisting plant as claimed in claim 12, wherein the first opposite sides of the guide framework are different than the second opposite sides of the guide framework.

14. The shaft hoisting plant as claimed in claim 10, further comprising supports supporting the braking frame, the supports arranged on the lower brace.

15. The shaft hoisting plant as claimed in claim 5, wherein the guide framework has vertical support girders an upper brace and a lower brace, which each of the upper brace and the lower brace consists of cross girders arranged between the support girders.

16. The shaft hoisting plant as claimed in claim 15, wherein at least two pairs of the pair of retaining bars are arranged on two opposite sides of the guide framework, each of the retaining bars are fastened to the lower brace and the upper brace and extend parallel to the support girders between the upper brace and the lower brace.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The overwind brake device according to the invention is explained in more detail in the following text with reference to the figures, in which

(2) FIG. 1 is shows a perspective view of a first exemplary embodiment of an overwind brake device according to the invention, arranged at the upper filling station of a shaft hoisting plant, with a braking frame,

(3) FIG. 2a is a front view of the overwind brake device according to FIG. 1 before overwinding,

(4) FIG. 2b is a side view of the overwind brake device according to FIG. 1 before overwinding,

(5) FIG. 2c a side view of the overwind brake device according to FIG. 1 after overwinding,

(6) FIG. 3 is a perspective view of a second exemplary embodiment of an overwind brake device according to the invention, arranged at the upper filling station of a shaft hoisting plant, without a braking frame, and

(7) FIG. 4 is a perspective view of a third exemplary embodiment of an overwind brake device according to the invention, arranged at the upper filling station of a shaft hoisting plant, without a braking frame.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(8) FIG. 1 shows a first exemplary embodiment of an overwind brake device (1) for a conveyance (2), configured as a cage, which is arranged at the end of the winding path above the upper filling station.

(9) The overwind brake device (1) has a braking frame (5) which is positively driven in a longitudinal direction (4) in a guide framework (3), said braking frame (5) being set up to be struck by the conveyance (2) upon overwinding of the conveyance (2).

(10) The guide framework (3) comprises four vertical support girders (3.1) and an upper brace (3.2) and a lower brace (3.3), which each consist of four cross girders (3.4) arranged between the support girders (3.1). The cuboidal guide framework (3) is bounded by opposite end sides (3.5) parallel to the open end sides of the cage (2), and opposite long sides (3.6) parallel to the side walls of the cage (2).

(11) On the opposite long sides (3.6) of the guide framework (3), in each case one pair of retaining bars (6.1, 6.2) is fastened to the upper and lower brace (3.2, 3.3) by means of fastening strips (7). The pairs of retaining bars (6.1, 6.2) extend parallel to the support girders (3.1) and in the longitudinal direction (4) of the guide framework (3). Between the pairs of retaining bars (6.1, 6.2), plates (8) of energy-absorbing material are arranged one above another in the longitudinal direction (4). The material is in particular fiber-reinforced plastic.

(12) The rectangular braking frame (5) is stiffened by struts (5.1) which at the same time form the impact surface for the conveyance (2) that strikes upon overwinding. From the outer periphery of the braking frame (5), in each case one plow (9) extends in the direction of the long sides (3.6) of the guide framework (3) on both sides, said plow (9) having a cutting edge (9.1) (cf. FIG. 2b) in the direction of the braking path (10) (cf. FIG. 2c). The plow (9) extends in a horizontal direction into the intermediate space between the retaining bars (6.1, 6.2) beneath the plates (8) of energy-absorbing material.

(13) Furthermore, arranged at the outer edge of the braking frame (5) are a total of four guide shoes (11), which extend in the direction of the opposite end sides (3.5) of the guide framework (3). On the opposite end sides (3.5) of the guide framework (3), in each case two guide profiles (12) are fastened to the lower and upper brace (3.2, 3.3), symmetrically to the middle of the end side (3.5), and extend parallel to the support girders (3.1). The guide shoes (11) fastened to the braking frame (5) engage around the guide profiles (12). As a result, the braking frame (5) is positively driven along the guide profiles (12) in a tilt-free manner in the longitudinal direction (4) of the guide framework (1).

(14) In FIG. 1, the braking frame (5) is in the starting position of the overwind brake device. In the starting position, the braking frame rests on supports (13.1, 13.2) which extend between the long-side cross girders (3.4) of the lower brace (3.3). The spacing between the supports (13.1, 13.2) is such that the rectangular braking frame (5) rests on the supports (13.1, 13.2) with the frame parts extending parallel to the end sides (3.5), but the conveyance (2) can pass easily through the cross section, narrowed by the supports (13.1, 13.2), in the guide framework (3).

(15) In the following, the mode of operation of the overwind brake device (1) according to the invention is explained in more detail with reference to FIGS. 2a-2c. It is apparent from FIGS. 2a and 2b that the braking frame (5) rests on the supports (13.1, 13.2) in the starting position. The guide shoes (11) engage around the guide profiles (12).

(16) It is apparent from FIG. 2b how the cutting edge (9.1) of the plow (9) fastened to the braking frame (5) bears against the underside of the stack, fixed between the retaining bars (6.1, 6.2), of plates (8) of energy-absorbing material.

(17) The conveyance (2) strikes the braking frame (5), which, as a result of the kinetic energy of the overwinding conveyance (2), moves upward along the braking path (10) in the guide framework (3) (cf. FIG. 2c). In the process, the plow (9) destroys the energy-absorbing material of the plates (8), and as a result brakes the conveyance (2) to a standstill at the end of the braking path (10).

(18) FIG. 3 shows a perspective view of a second exemplary embodiment of an overwind brake device arranged at the upper filling station of a shaft hoisting plant, but without a braking frame. Corresponding elements are provided with identical reference signs to those in the first exemplary embodiment.

(19) The overwind brake device (1) has a guide framework (3), which has four vertical support girders (3.1) and an upper brace (3.2) and a lower brace (3.3), which each consist of four cross girders (3.4) arranged between the support girders (3.1). The cuboidal guide framework (3) is bounded by opposite end sides (3.5) parallel to the open end sides of the cage (2), and opposite long sides (3.6) parallel to the side walls (2.1) of the cage (2).

(20) On the opposite long sides (3.6) of the guide framework (3), in each case one pair of retaining bars (6.1, 6.2) is fastened to the upper and lower brace (3.2, 3.3) by means of fastening strips (7). The pairs of retaining bars (6.1, 6.2) extend parallel to the support girders (3.1) and in the longitudinal direction (4) of the guide framework (3). Between the pairs of retaining bars (6.1, 6.2), plates (8) of energy-absorbing material are arranged one above another in the longitudinal direction (4). The material is in particular fiber-reinforced plastic.

(21) From the side walls (2.1) of the conveyance (2), in each case one plow (9) extends in the direction of the long sides (3.6) of the guide framework (3) on both sides, said plow (9) having a cutting edge (9.1) in the direction of the braking path (10). The plow (9) extends in a horizontal direction into the intermediate space between the retaining bars (6.1, 6.2) beneath the plates (8) of energy-absorbing material.

(22) It is apparent from FIG. 3, detail H, how the cutting edge (9.1) of the plow (9) bears against the underside of the stack, fixed between the retaining bars (6.1, 6.2), of plates (8) of energy-absorbing material. The overwinding conveyance (2) moves upward along the braking path (10) in the guide framework (3). In the process, the plow (9) destroys the energy-absorbing material of the plates (8), and as a result brakes the conveyance (2) to a standstill.

(23) FIG. 4 shows a perspective view of a third exemplary embodiment of an overwind brake device arranged at the upper filling station of a shaft hoisting plant, but without a braking frame. Corresponding elements are provided with identical reference signs to those in the first exemplary embodiment.

(24) The overwind brake device (1) has a guide framework (3), which has four vertical support girders (3.1) and an upper brace (3.2) and a lower brace (3.3), which each consist of four cross girders (3.4) arranged between the support girders (3.1). Located between the upper brace (3.2) and the lower brace (3.3) is a further, central brace (3.7), which comprises two cross girders (3.4) arranged in a parallel manner on opposite sides of the guide framework (3). The cuboidal guide framework (3) is bounded by opposite end sides (3.5) parallel to the open end sides of the cage (2), and opposite long sides (3.6) parallel to the side walls (2.1) of the cage (2).

(25) On the opposite side walls (2.1) of the cage (2), in each case one pair of retaining bars (6.1, 6.2) is fastened centrally. The pairs of retaining bars (6.1, 6.2) extend parallel to the support girders (3.1) and in the longitudinal direction (4) of the winding and overwind path. Between the pairs of retaining bars (6.1, 6.2), plates (8) of energy-absorbing material are arranged one above another in the longitudinal direction (4). The material is in particular fiber-reinforced plastic.

(26) From the cross girders (3.4) of the central brace (3.7) of the guide framework (3), in each case one plow (9) extends in the direction of the two side walls (2.1) of the cage (2), said plow (9) having a cutting edge (9.1) in the opposite direction to the direction of the braking path (10). The plow (9) extends in a horizontal direction into the intermediate space between the retaining bars (6.1, 6.2) above the plates (8) of energy-absorbing material. The overwinding conveyance (2) moves upward along the braking path (10) in the guide framework (3). In the process, the stationary plow (9) destroys the energy-absorbing material of the plates (8) between the retaining bars (6.1, 6.2), and as a result brakes the conveyance (2) to a standstill at the end of the braking path (10).

(27) TABLE-US-00001 No. Designation 1. Overwind brake device 2. Conveyance 2.1 Side walls 3. Guide framework 3.1 Support girders 3.2 Upper brace 3.3 Lower brace 3.4 Cross girders 3.5 End sides 3.6 Long sides 3.7 Central brace 4. Longitudinal direction 5. Braking frame 5.1 Struts 6.1 Retaining bar 6.2 Retaining bar 7. Fastening strips 8. Plates of energy-absorbing material 9. Plow 9.1 Cutting edge 10 Braking path 11. Guide shoes 12. Guide profiles 13.1 Support 13.2 Support