Float-swing hydraulic support

Abstract

A float-swing hydraulic support, including a top beam, shield beam, elevating frame, base, adjusting jack, two float hydraulic columns, base raising unit, advancing unit, face guard unit, telescopic beam unit, hydraulic control valve block, and a valve block support. The columns are between the top beam and base, with upper ends ball-hinged to the top beam and lower ends ball-hinged to the base; the telescopic beam unit is in the front end of the top beam, and the face guard unit is hinged to the beam unit; the upper end of the shield beam is hinged to the top beam, the lower end is hinged to the upper end of the frame; the upper end of the jack is hinged to the shield beam, the lower end hinged to the base; the ends of the advancing unit are hinged to a scraper conveyor and the base, respectively.

Claims

1. A float-swing hydraulic support, comprising a top beam, a shield beam, an elevating frame, a base, an adjusting jack, an advancing unit, and a hydraulic control valve block, wherein: a rear end of the advancing unit is hinged to the base; two float hydraulic columns are arranged in parallel between a front part of the base and the top beam; upper ends of the two float hydraulic columns are ball-hinged to the top beam, lower ends of the two float hydraulic columns are ball-hinged to the base, and a rear part of the base is welded with the elevating frame as a whole; a telescopic beam unit is arranged at a front end of the top beam, a face guard unit is hinged to a front end of the telescopic beam unit, a rear end of the top beam is hinged with the shield beam, and a lower end of the shield beam is hinged directly to an upper end of the elevating frame; an upper end of the adjusting jack is hinged to the shield beam, and a lower end of the adjusting jack is hinged to the base; the top beam swings up and down around a hinge shaft between the top beam and the shield beam under the action of the two float hydraulic columns; the shield beam swings up and down around a hinge shaft between the shield beam and the elevating frame under the action of the adjusting jack; a front bridge piece and a rear bridge piece are arranged on the base, a base raising unit is arranged on the front bridge piece, and a valve block support provided with the hydraulic valve block is mounted on the rear bridge piece.

2. The float-swing hydraulic support according to claim 1, wherein: the hydraulic control valve block is a manually operated hydraulic valve block or electro-hydraulically remotely-controlled valve block.

3. The float-swing hydraulic support according to claim 1, wherein: the face guard unit is a first-grade face guard unit, or a second-grade face guard unit, or a zero-grade face guard unit.

4. The float-swing hydraulic support according to claim 1, wherein: the advancing unit is a direct-push advancing unit or a back-pull advancing unit.

5. The float-swing hydraulic support according to claim 1, wherein: the adjusting jack comprises one jack bar used separately or two jack bars used in parallel.

6. The float-swing hydraulic support according to claim 1, wherein: a diagonal bracing comprising one bracing bar used separately or two bracing bars used in parallel is arranged between an upper part of the elevating frame and the base.

7. The float-swing hydraulic support according to claim 1, wherein a front end of the advancing unit is hinged for coupling with a scraper conveyor.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a schematic structural diagram of example 1 of the present invention;

(2) FIG. 2 is a schematic structural diagram of example 2 of the present invention;

(3) In the figures: 1top beam; 2shield beam; 3elevating frame; 4base; 5adjusting jack; 6float hydraulic columns; 7base raising unit; 8advancing unit; 9scraper conveyor; 10face guard unit; 11telescopic beam unit; 12hydraulic control valve block; 13valve block support; 14front bridge piece; 15rear bridge piece; 16diagonal bracing; 17hinge shaft, 18hinge shaft.

DETAILED DESCRIPTION

(4) Hereunder the present invention will be further described according to the examples shown in the accompanying drawings:

Example 1

(5) As shown in FIG. 1, the float-swing hydraulic support provided in the present invention mainly comprises a top beam 1, a shield beam 2, an elevating frame 3, a base 4, an adjusting jack 5, two float hydraulic columns 6, a base raising unit 7, an advancing unit 8, a scraper conveyor 9, a face guard unit 10, a telescopic beam unit 11, a hydraulic control valve block 12, a valve block support 13, a front bridge piece 14, and a rear bridge piece 15. The top beam 1, shield beam 2, elevating frame 3, and base 4 are made of steel plate or profile steel by welding. The front bridge piece 14 and the rear bridge pieces 15 are made of thick steel plates by welding, and are welded with the base 4 as a whole. The hydraulic control valve block 12 is a manually operated valve block or electro-hydraulically remotely-controlled valve block, serves as a manipulation center of the actions of the support, and can be manually operated or electro-hydraulically remotely-controlled. The front end of the advancing unit 8 is hinged to the scraper conveyor 9, and the rear end of the advancing unit 8 is hinged to the base 4; the advancing unit 8 is a direct-push advancing unit or a back-pull advancing unit. The two float hydraulic columns 6 are arranged in parallel between the front part of the base 4 and the top beam 1, the upper ends of the two float hydraulic columns 6 are ball-hinged to the top beam 1, and the lower ends of the two float hydraulic columns 6 are ball-hinged to the base 4. The rear part of the base 4 is welded with the elevating frame 3 as a whole; the telescopic beam unit 11 is disposed in the front end of the top beam 1, and the face guard unit 10 is hinged to the front end of the telescopic beam unit 11; the face guard unit 10 is a first-grade face guard unit, or a second-grade face guard unit, or a zero-grade face guard unit; the face guard unit is composed of face guards, face guard jack supporting the face guards, and hinge shafts. The rear end of the top beam 1 is hinged with the shield beam 2 together, and the lower end of the shield beam 2 is hinged with the upper end of the elevating frame 3 together; the upper end of the adjusting jack 5 is hinged to the shield beam 2, and the lower end of the adjusting jack 5 is hinged to the base 4; the adjusting jack 5 comprises one jack bar used separately or two jack bars used in parallel. The top beam 1 swings up and down around the hinge shaft between it and the shield beam 2 under the action of the two float hydraulic columns 6; the shield beam 2 swings up and down around the hinge shaft between it and the elevating frame 3 under the action of the adjusting jack 5; the front and rear bridge pieces are arranged on the base 4, the base raising unit 7 is arranged on the front bridge piece 14, and the valve block support 13 provided with hydraulic valve block 12 is mounted on the rear bridge piece 15.

(6) The advancing unit 8 is disposed in the base 4, with two ends being respectively hinged to the base 4 and the scraper conveyor 9 in the coal mining working face; the advancing unit 8 is a component configured to push the scraper conveyor 9 and move the hydraulic support. When the two float hydraulic columns 6 extend and retract up and down, the top beam 1 swings up and down around the hinge shaft 17 between the top beam 1 and the shield beam 2; when the adjusting jack 5 extends and retracts up and down, the shield beam 2 swings up and down around the hinge shaft 18 between the shield beam 2 and the elevating frame 3.

(7) The hydraulic control valve block 12 serves as a manipulation center for the manipulation and control of float-swing hydraulic support, i.e., the two float hydraulic columns 6, telescopic beam unit 11, face guard unit 10, advancing unit 8, base raising unit 7, and adjusting jack 5 of the support are manipulated and controlled via the hydraulic control valve block 12; the hydraulic control valve block 12 is mounted on the rear bridge piece 15 via the valve block support 13.

Example 2

(8) As shown in FIG. 2, example 2 is essentially the same as the example 1. Herein, the description of identical parts is omitted. The difference lies in: a diagonal bracing 16 comprising one bracing bar used separately or two bracing bars used in parallel is arranged between the upper part of the elevating frame 3 and the base 4.

(9) Working Process:

(10) To raise the support, the hydraulic control valve block 12 is operated, so that a high-pressure liquid enters into a big chamber of the two float hydraulic columns 6 and the adjusting rack 5, and the top beam 1 and the shield beam 2 swing and move upward; the shield beam 2 stops moving upward when it comes into contact with the roof, while the top beam 1 further swing slightly around the hinge shaft between the top beam 1 and the shield beam 2 under the action of the two float hydraulic columns 6, till the initial support resistance of the support is reached; the telescopic beam unit 11 and the face guard unit 10 extend or unfold accordingly, and the shield beam 2 rotates around the hinge shaft between it and the elevating frame 3 during the rising process.

(11) To lower the support, the hydraulic control valve block 12 is operated, so that the high-pressure liquid enters into a small chamber of the two float hydraulic columns 6 and the adjusting jack 5, the top beam 1 and the shield beam 2 swing and move downward, the telescopic beam unit 11 and the face guard unit 10 retract accordingly, the top beam 1 rotates around the hinge shaft between it and the shield beam 2 and descends at the same time, while the shield beam 2 swings around the hinge shaft between it and the elevating frame 3 and descends at the same time; thus, the top beam 1 and the shield beam 2 swing in relation to each other around their hinge shafts at the same time and thereby the support is lowered.

(12) To push the scraper conveyor 9 forward, the hydraulic control valve block 12 is operated, so that the high-pressure liquid enters into a small chamber or a big chamber of the jack in the advancing unit 8, and thereby the scraper conveyor 9 is pushed forward.

(13) To advance the hydraulic support, the scraper conveyor 9 is fixed, and the hydraulic control valve block 12 is operated, so that the high-pressure liquid enters into a small chamber or a big chamber of the jack in the advancing unit 8, and thereby the hydraulic support is pulled forward.

(14) All of the four actions of the support are accomplished by operating the hydraulic control valve block 12, and the sequence of actions of the support is determined according to the field situation at the working face; a working cycle of the support is accomplished whenever a cycle of support raising, support lowering, conveyor pushing, and support advancing actions is completed.