WO2013131318A1 - Two-prop shield hydraulic support for large centre to centre distance and ultra-high working resistance in medium-thickness coal seams - Google Patents

Abstract

Disclosed is a two-prop shield hydraulic support for large centre to centre distance and ultra-high working resistance in a medium-thickness coal seam, comprising a top beam (6), a base (15), and a caving shield (12), wherein a rear end of the top beam is hinged to the caving shield, the caving shield is hinged to the base via a front connecting rod (13) and a rear connecting rod (14), and twin props (19) are provided between the top beam and the base. The support is provided with dual pedestrian passageways. The part of the rear end of the top beam hinged with the caving shield is provided with an arcuate protective panel (27). The caving shield is provided with an integral communicating rib (25) and a dual-layer cover panel (26). The outside of the props is provided with a prop protecting sheath (23). A fire retardant filler (24) is provided at the sockets where the base is connected to the props. The protection height of the support is 1.8 to 3.5 metres. The centre to centre distance is greater than or equal to 1.75 metres. The working resistance is greater than or equal to 12,000 kn. The support is safe, reliable and the production conditions are good. The support can realize the performance criterion of "reusing the hydraulic support 20,000 times without major overhaul", and guarantees the aim of sustainable development with high yield and high efficiency of mines, increasing the financial benefits.

Description

 Medium-thick coal seam two-column shield type large center distance ultra high working resistance hydraulic support

This application claims the priority of the Chinese patent application filed on March 7, 2012, the Chinese Patent Office, the application number is 201210058470.4, and the invention name is “medium-thick coal seam two-column shielded large center distance ultra-high working resistance hydraulic support”. The entire contents are incorporated herein by reference.

Technical field

The invention relates to a hydraulic support for coal mines, in particular to a two-column shielded large center distance ultra-high working resistance hydraulic support for medium and thick coal seams.

Background of the invention

At present, with the continuous development of coal mining technology, it has promoted and led the rapid development of the coal machinery equipment industry. The development and manufacture of hydraulic supports have also made great progress, but subject to objective conditions and subjective conditions, the service life of the hydraulic support, the overhaul cycle, and the humanized design still have a certain gap with foreign countries, so that the production continues and the work is reversed. Frequently, it has caused a series of factors that are not conducive to high-yield and high-efficiency mining, such as waste of resources and large amount of equipment maintenance, shortening the service period of the mine and restricting the coordinated development of the entire coal industry. Therefore, in order to ensure mine safety, reliability, improved production conditions, high production, high efficiency and sustainable development, China's coal industry must study the difficulty of extending the hydraulic support overhaul cycle, and realize the "hydraulic support 20000 cycle not overhaul" to provide technical support and guarantee for coal seam mining. .

At present, the evaluation standard of the hydraulic support is still based on the number of trials of the sample rack, and the relevant certification is obtained according to the relevant national standards. However, whether it meets the complicated working conditions of the underground, whether it can meet the extended overhaul period cannot be explained.

Summary of the invention

The object of the present invention is to provide a two-column shielded large center-to-center ultra-high working resistance hydraulic support which is safe, reliable, good in production condition, high in production and high in efficiency.

The object of the invention is achieved by the following technical solutions:

The medium-thick coal seam two-column shielded large center-to-center ultra-high working resistance hydraulic support comprises a top beam, a base and a cover beam, and the rear end of the top beam is hinged with the shield beam, and the shield beam passes through the front connecting rod and The rear connecting rod is hinged with the base, and the double pillar is arranged between the top beam and the base, wherein the bracket is provided with a double pedestrian passage, which is respectively a front channel of the front side of the double column and a double column and a front connecting rod. Intra-frame passage

The support height of the bracket is 1.8-3.5 meters, the center distance is greater than or equal to 1.75 meters, and the working resistance is greater than or equal to 12000 kn;

a circular arc guard is disposed at a portion of the top end of the top beam and the shield beam;

The cover beam is longitudinally provided with an integral through rib, and the lower part of the cover beam is provided with a double cover plate;

A pillar protection sleeve is disposed on an outer portion of the column, and a flame-retardant filler is disposed at the pillar socket connected to the pillar.

It can be seen from the technical solution provided by the present invention that the medium-thick coal seam two-column shielded large center-to-center ultra-high working resistance hydraulic support provided by the present invention has double pedestrian passages, which are respectively the front side of the double column. The front channel and the inner channel between the double column and the front connecting rod; the rear end of the top beam and the shielding beam are hinged with a circular arc guard; the shielding beam is longitudinally provided with an integral through rib, and the lower part of the shielding beam is provided with double Layer cover; the outer part of the column is provided with a pillar protection sleeve, and the column socket connected with the base and the column column is provided with a flame-retardant filler, and the support height is 1.8-3.5 meters, the center distance is greater than or equal to 1.75 meters, and the working resistance is greater than Or the bracket equal to 12000kn, safe, reliable, and good production conditions, can achieve the performance index of "hydraulic support 20000 cycle not overhaul", to ensure the goal of high-yield, high-efficiency and sustainable development of the mine, and improve economic benefits.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic structural view of a two-column shielded large center-to-center ultra-high working resistance hydraulic support for a medium-thick coal seam according to an embodiment of the present invention;

2 is a bottom view of a shield beam according to an embodiment of the present invention;

3 is a longitudinal cross-sectional view showing a shield beam in an embodiment of the present invention;

4 is a schematic view showing a mounting position of a circular arc guard according to an embodiment of the present invention;

FIG. 5a is a schematic structural diagram of an adjustable rotary controller frame according to an embodiment of the present invention; FIG.

FIG. 5b is a schematic structural diagram of an adjustable rotary controller frame according to an embodiment of the present invention; FIG.

6 is a schematic structural view of a rotatable wall protection device according to an embodiment of the present invention;

FIG. 7 is a schematic structural view of a detachable wind shield according to an embodiment of the present invention.

In the figure, the serial number: 1, the guard; 2, the long pole; 3, the short rod; 4, the telescopic beam; 5, the joist; 6, the top beam; 7, the guard jack; 8, the telescopic jack; 9, the top beam side Guard plate; 10, rotating controller frame; 11, balance jack; 12, shield beam and its side guard; 13, front link; 14, rear link; 15, base; 16, inter-stand fluid multi-pass Tube group; 17, shifting jack; 18, pedestrian pedal; 19, column; 20, lifting jack; 21, putter; 22, connector; 23, column protection sleeve; 24, flame retardant column filling; 25, overall Reinforcement; 26, double-layer cover; 27, arc shield; 28, fixed frame; 29, orifice plate; 30, diagonal bracing; 31, controller; 32, rotatable retaining device in the provoked state; a retractable wall-retaining device; 34, a windshield in the retracted state; 35, a windshield in an extended state.

Mode for carrying out the invention

The medium-thick coal seam two-column shielded large center-to-center ultra-high working resistance hydraulic support according to the present invention has a preferred embodiment as shown in FIG. 1 :

a top beam, a base, a shield beam, a rear end of the top beam is hinged to the shield beam, the shield beam is hinged to the base through a front link and a rear link, and a double column is arranged between the top beam and the base. The utility model is characterized in that the bracket is provided with a double pedestrian passage, which is a front passage of the front side of the double pillar and an inner passage between the double pillar and the front link;

The support height of the bracket is 1.8-3.5 meters, the center distance is greater than or equal to 1.75 meters, and the working resistance is greater than or equal to 12000 kn;

As shown in FIG. 2 and FIG. 3, the cover beam is provided with an integral through rib in the longitudinal direction, and a double cover plate is arranged on the lower part of the shield beam;

As shown in FIG. 4, a portion of the top end of the top beam is hinged with the shield beam;

A pillar protection sleeve is disposed on an outer portion of the column, and a flame-retardant filler is disposed at the pillar socket connected to the pillar.

An adjustable rotary controller frame is disposed below the top beam.

As shown in FIG. 5a and FIG. 5b, the adjustable rotary controller frame includes a fixing frame and an orifice plate hinged to each other, and an upper end of the fixing frame is fixed under the top beam, the fixing frame and the fixing frame are a slanting plate is arranged between the orifice plates, and the slanting slab is provided with a plurality of connecting holes;

The lower end of the orifice plate is hinged with a controller, and a plurality of fixing holes are arranged around the hinge point.

The top beam is an integral top beam structure, the front part of the top beam is provided with a built-in telescopic beam, and a telescopic jack is arranged between the built-in telescopic beam and the top beam, and the front end of the built-in telescopic beam is hinged The support is provided with a joist under the middle of the top beam, a guard jack is hinged between the guard and the joist, and a small four-bar linkage is arranged between the guard and the guard jack.

The front end of the top beam is provided with a reinforced frame plate and is provided with a cut-proof protection block.

The movable side guard is provided on both sides of the top beam.

As shown in Figure 6, the side of the top beam is provided with a rotatable wall protection device, the rotatable wall protection device is hinged to the top beam, and a jack is arranged between the rotatable wall protection device and the top beam;

As shown in FIG. 7, the side of the shield beam is provided with a detachable wind shield, and the detachable wind shield comprises two independent windshields, at least one of which is disposed between the windshield and the shield beam. There are jacks.

The outer side of the bracket is provided with a rotatable damper plate.

The base adopts an open bottom form, and is divided into a left bottom and a right bottom. The front portions of the left bottom and the right bottom are connected by a bridge, and the rear portions of the left bottom and the right bottom are connected by a rear bridge, the left A pushing mechanism in the form of a flip-chip push rod is provided between the bottom and the right bottom.

The inter-frame feed-in and multi-flow pipe set of the bracket adopts a whole stainless steel material bending structure.

The medium-thick coal seam two-column shield type large center distance ultra-high working resistance hydraulic support, the bracket provides double pedestrian passage, can realize the performance index of "hydraulic support 20000 cycle not overhaul", and ensures the mine is safe and reliable. The goal of improving production conditions, high yield, high efficiency and sustainable development has improved economic efficiency.

In a specific embodiment of the present invention, the integral top beam structure, the column socket is in a forged form, the front end of the top beam is in the form of a reinforced frame plate and is provided with a cut-proof protection block; the built-in telescopic beam slides in the top beam beam through the telescopic jack; The guard is hinged to the front end of the telescopic beam, and the joist is arranged below the middle part of the top beam. The guard jack is hinged between the guard and the joist. The hinged small four-bar linkage mechanism can realize 180° rotation of the guard plate; The side guard plate is fixed on one side and movable on the other side when used; the shield beam adopts the form of integral through bars; the front and rear links adopt a double link mechanism, the base adopts an open bottom form, the front part is connected by a bridge, and the rear part has a rear axle. The plate is connected; the pushing mechanism adopts a flip-type long push rod form; the jack of the bottoming mechanism is connected with the bridge plate by a pin shaft.

The effect of the present invention is significant compared to the prior art. The telescopic mechanism and the guard mechanism of the bracket can timely protect the top and the guard; the reinforcing frame plate and the cut-proof protection block at the front end of the top beam can effectively prevent the crack of the top beam lip; the rear part of the bracket top beam and the shield beam are hinged The arc guard plate prevents leakage; the shield beam adopts the form of integral through bars, and the double-layer cover plate is added to enhance the torsion resistance of the shield beam; the multi-pass pipe group for the inter-frame inlet and return liquid adopts the whole stainless steel material bending form; Easy to replace; the bottom lifting mechanism is fixed by the pin shaft and has higher reliability than the previous bolt connection; the adjustable rotary controller frame is convenient for workers to operate; and the outer side of the end bracket is provided with a rotatable retaining plate to prevent the old Tang The meteorite is broken in, and the rotatable wall-protecting device is arranged on the top beam to leave a safe space for the pedestrian, and a detachable wind-proof device is arranged on the cover beam.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope of the present disclosure. Alternatives are intended to be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims (9)

1. A medium-thick coal seam two-column shielded large center-to-center ultra-high working resistance hydraulic support comprises a top beam, a base and a shield beam, the rear end of the top beam being hinged to the shield beam, the shield beam passing through the front connecting rod and the rear The connecting rod is hinged to the base, and the double pillar is arranged between the top beam and the base, wherein the bracket is provided with a double pedestrian passage, which is respectively between the front channel of the front side of the double pillar and the double pillar and the front connecting rod. Intra-frame passage;

   The support height of the bracket is 1.8-3.5 meters, the center distance is greater than or equal to 1.75 meters, and the working resistance is greater than or equal to 12000 kn;

   a circular arc guard is disposed at a portion of the top end of the top beam and the shield beam;

   The cover beam is longitudinally provided with an integral through rib, and the lower part of the cover beam is provided with a double cover plate;

   A pillar protection sleeve is disposed on an outer portion of the column, and a flame-retardant filler is disposed at the pillar socket connected to the pillar.
2. The medium-thick coal seam two-column shielded large center-to-center ultra-high working resistance hydraulic support according to claim 1, wherein an adjustable rotary controller frame is disposed below the top beam, and the adjustable rotary type The controller frame includes a fixing frame and an orifice plate which are hinged to each other, and an upper end of the fixing frame is fixed under the top beam, and a diagonal bracing plate is arranged between the fixing frame and the orifice plate, and the diagonal bracing plate is arranged a plurality of connecting holes are arranged thereon;

   The lower end of the orifice plate is hinged with a controller, and a plurality of fixing holes are arranged around the hinge point.
3. The medium-thick coal seam two-column shield type large center-to-center ultra-high working resistance hydraulic support according to claim 2, wherein the top beam is an integral top beam structure, and the front part of the top beam is provided with a built-in type expansion and contraction. a beam, a telescopic jack is arranged between the inner telescopic beam and the top beam, a front end of the inner telescopic beam is hinged with a guard, and a joist is arranged below the middle part of the top beam, the guard and the joist There is a guard jack attached between them, and a small four-bar linkage mechanism is arranged between the guard and the guard jack.
4. The medium-thick coal seam two-column shielded large center-to-center ultra-high working resistance hydraulic support according to claim 3, wherein the front end of the top beam is provided with a reinforced frame plate and is provided with a cut-proof protection block.
5. The medium-thick coal seam two-column shield type large center-to-center ultra-high working resistance hydraulic support according to any one of claims 1 to 4, characterized in that the movable side guard plates are arranged on both sides of the top beam.
6. The medium-thick coal seam two-column shield type large center-to-center ultra-high working resistance hydraulic support according to claim 5, wherein the side of the top beam is provided with a rotatable wall protection device, and the rotatable wall protection device and the top beam Hinged, and a jack is arranged between the rotatable wall protection device and the top beam;

   The side of the shield beam is provided with a detachable windshield device, and the detachable windshield device comprises two independent windshields, wherein at least one windshield and the shield beam are provided with a jack.
7. The medium-thick coal seam two-column shielded large center-to-center ultra-high working resistance hydraulic support according to claim 6, wherein the outer side of the bracket is provided with a rotatable damper plate.
8. The medium-thick coal seam two-column shielded large center-to-center ultra-high working resistance hydraulic support according to claim 7, wherein the base is in an open bottom form, and is divided into a left bottom and a right bottom, the left bottom and the right side. The front portion of the bottom is connected by a bridge, the rear portions of the left bottom and the right bottom are connected by a rear bridge, and a pushing mechanism in the form of a flip-length push rod is provided between the left bottom and the right bottom.
9. The medium-thick coal seam two-column shielded large center-to-center ultra-high working resistance hydraulic support according to claim 8, wherein the inter-frame inlet and outlet fluid multi-way pipe set of the bracket adopts an integral stainless steel material bending structure.

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