CN214330662U

CN214330662U - Anti-falling and anti-skid device for hydraulic support with large-inclination-angle working surface

Info

Publication number: CN214330662U
Application number: CN202022871667.2U
Authority: CN
Inventors: 崔贝贝; 赵光明; 樊华; 丁雁; 赵永吉; 成玲珑
Original assignee: Shanxi Jincheng Anthracite Mining Group Co Ltd
Current assignee: Shanxi Jincheng Anthracite Mining Group Co Ltd
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2021-10-01
Anticipated expiration: 2030-12-04

Abstract

The utility model belongs to the technical field of underground hydraulic supports, in particular to an anti-falling and anti-skid device for a hydraulic support with a large-dip-angle working surface; the hydraulic support aims at solving the problems of gliding, dumping, squeezing, biting and the like of the hydraulic support in a supporting state; the anti-falling and anti-sliding device is sequentially connected with the top beam and the base of the adjacent hydraulic supports, and the front end of the base of the hydraulic support is connected with the front sliding end of the scraper and the rear sliding end of the tail of the base of the hydraulic support is connected with the rear sliding end of the scraper. The utility model discloses take by last under to, by preceding design after to, respectively follow back timber and base, through increasing the interact power between the supporting three machines, offset the part and act on the tangential component force of support, and then solve the support gliding under the state of strutting, empty, crowd the frame, sting a scheduling problem.

Description

Anti-falling and anti-skid device for hydraulic support with large-inclination-angle working surface

Technical Field

The utility model belongs to the technical field of hydraulic support in the pit, concretely relates to anti-falling antiskid is prevented to big inclination working face hydraulic support.

Background

According to the size of the dip angle, the coal bed can be divided into: gently sloping seams (< 25 °), sloping seams (25 ° -45 °), and steeply sloping seams (> 45 °). With the development of coal mine technology, the mining of coal seams with large inclination angles becomes more and more, and the high-yield and high-efficiency mechanized mining of steeply inclined coal seams also becomes one of the technical problems in the coal mining industry. Due to the particularity of the occurrence conditions of the coal bed, a plurality of difficulties are brought to safe, efficient and mechanical exploitation. The hydraulic support is used as an important component of coal mining equipment, is indispensable corollary equipment for comprehensive mechanized coal mining, is also the only supporting equipment for underground coal mining, and becomes an important factor for restricting the mechanization of the mining of a coal bed with a large inclination angle for a plurality of potential safety hazards existing on a working face with the large inclination angle. In order to fundamentally solve the support difficult problem in the large-inclination-angle comprehensive mechanized coal mining process and provide technical support for smooth mining of the coal seam, the complete hydraulic support anti-falling and anti-skidding system is finally invented through continuous investigation, simulation, calculation and simulation, and further the problems of gliding, toppling, frame squeezing, frame biting and the like of the support in a support state are fundamentally solved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving under the special geological conditions in big inclination coal seam, synthesize the supporting difficult problem among the mechanized coal mining process, solve the gliding of hydraulic support under the state of strutting, empty, crowd the frame, sting a scheduling problem.

The utility model adopts the following technical scheme: a hydraulic support anti-falling and anti-skid device for a large-inclination working surface; the anti-falling and anti-sliding device is sequentially connected with the top beam and the base of the adjacent hydraulic supports, and the front end of the base of the hydraulic support is connected with the front sliding end of the scraper and the rear sliding end of the tail of the base of the hydraulic support is connected with the rear sliding end of the scraper.

Furthermore, the anti-falling and anti-skidding device comprises two connecting pins, a chain and two connecting heads, wherein the two connecting pins are vertically arranged and are respectively positioned on the left side and the right side of the front end of the base;

the anti-falling and anti-skidding device further comprises a connecting plate, the connecting plate is arranged at the tail of the base, pull holes are respectively formed in the left side and the right side of the base on the connecting plate, and the pull holes are connected with a chain and a scraper plate in a sliding mode.

Furthermore, the anti-falling and anti-sliding device comprises a bottom adjusting jack, wherein the bottom adjusting jack is arranged on one side of the base and extends out to abut against the base of the adjacent hydraulic support.

Furthermore, the bottom adjusting jacks comprise a front bottom adjusting jack and a rear bottom adjusting jack, the front bottom adjusting jack is positioned below the front pedal, and the rear bottom adjusting jack is positioned below the rear pedal and close to one side of the tail of the base.

Furthermore, the front bottom adjusting jack and the rear bottom adjusting jack are both arranged in the supporting sleeve.

Furthermore, the anti-falling and anti-skidding device comprises a pin shaft, a sleeve and a connecting jack, the pin shaft extends out of the beam bottom of the top beam, the pin shaft is sleeved with the rotatable sleeve, lug plates are respectively arranged on the sleeve in the radial direction forwards and backwards, and the lug plates are connected with the top beam of the front hydraulic support and the top beam of the rear hydraulic support through the connecting jack.

Further, the pin shaft is positioned between the front column socket and the rear column socket of the top beam.

Furthermore, the chain connecting the front end and the tail part of the base is in an outward-stretching shape.

Furthermore, a tensioning device is arranged between the front end of the base and the chain connected with the front sliding of the scraper.

Compared with the prior art, the utility model has the advantages that:

the utility model provides a pair of anti-skidding device is prevented down to big inclination working face hydraulic support transfers device, base afterbody antiskid to constitute by two ends in back timber anti-tilting device, base front end antiskid, base middle part. By utilizing the mutual relation in the matching of the three machines and increasing the mutual acting force, part of tangential component force acting on the bracket is offset, and the normal support of the bracket is further ensured; the design idea of from top to bottom and from front to back is adopted, and the anti-falling and anti-skidding design is pertinently carried out on a top beam and a base of a bracket bearing load and friction force; all designs adopt a condition separation principle, namely the system is used when the limit inclination angle is exceeded, and when the normal geological condition is recovered, the anti-falling and anti-skidding device is taken down, so that the normal operation can be realized.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic view of a base portion of the anti-slip and anti-fall device.

Fig. 3 is a partial schematic view of a top beam of the anti-skid and anti-fall device.

Fig. 4 is a perspective view of the base.

Fig. 5 is a schematic connection diagram of the connecting head and the connecting pin.

FIG. 6 is a schematic diagram of the working state and stress analysis of the large-inclination-angle working surface bracket.

In the figure: 1-top beam; 2-a base; 2-1-rear foot pedal; 2-2-forefoot pedal; 2-3-connecting cylinder; 3-bottom regulation of jack; 3-1-rear foot pedal; 3-2-forefoot pedal; 4-a support sleeve; 5-a chain; 6, tensioning the device; 7-a connector; 8-connecting pins; 9-a connecting plate; 9-1-broaching; 10-a pin shaft; 11-sleeve.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Force analysis of a stent

For special geological conditions of a high-inclination-angle coal bed, the gravity borne by the support on the working face can be decomposed into a normal component perpendicular to the top beam of the support and a tangential component parallel to the working face. The normal component force is beneficial to the stability of the support, and the tangential component force pushes the support to slide downwards and overturn along the coal bed, so that the stability of the support is not beneficial. Along with the increase of the inclination angle of the working face, the normal force is reduced, and the tangential force is increased, so that the phenomena of downward sliding and toppling of the working face support and squeezing and biting between the supports are aggravated. Meanwhile, the inclination angle of the coal bed is increased, the mine pressure of the working face is changed greatly, the moving distance of the top plate and the bottom plate of the coal bed is gradually reduced along with the increase of the inclination angle, the gravity of the overlying rock is reduced along the normal direction of the layer surface, and the tangential gliding force is increased, so that the lateral load of the support is increased, and the lateral extrusion and the backward sliding of the support are more prominent when the inclination angle is larger. The working state and stress analysis schematic diagram of the large-inclination working surface bracket is shown in fig. 6.

According to the stress analysis of the hydraulic support under the geological condition with a large inclination angle, the problem that the support slides down in a supporting state needs to be solved by reducing the tangential component force which is parallel to a working surface and acts on the support, namely increasing the reverse acting force of the tangential component force of the support. Meanwhile, because the special geological conditions of the steeply inclined coal seam are uncontrollable factors, the increase of the connection among the three machines, namely the increase of the interaction force among the three machines matched with each other is considered to offset part of the tangential component force acting on the support, so that the phenomena of downward sliding, toppling, frame squeezing, frame biting and the like of the support in a supporting state are solved.

The utility model provides a big inclination working face hydraulic support prevents down antiskid, includes hydraulic support's back timber 1 and base 2, prevents down antiskid and connects adjacent hydraulic support's back timber 1 and base 2 in proper order to and with 2 front ends connection scraper blade forerunners of base of hydraulic support, afterbody connection scraper blade back runners.

As shown in fig. 2; the part of the anti-falling and anti-sliding device acting on the top beam 1 comprises a pin shaft 10, a sleeve 11 and a connecting jack, the pin shaft 10 extends out of the bottom of the top beam 1, the pin shaft 10 is sleeved with the rotatable sleeve 11, the sleeve 11 is respectively provided with an ear plate in the radial direction front and back, and the ear plates are connected with the top beams of the front and back hydraulic supports through the connecting jack.

The top beam 1 is in direct contact with a top plate, bears the rock load and dynamic pressure of the top plate, and the pin shaft 10 is arranged in the middle of the front column socket and the rear column socket in consideration of the stress condition. When the support is used, the adjacent supports are connected through the connecting jacks, and the supports are prevented from toppling over by increasing the contact area and the interaction force of the supports.

The base 2 is a main contact point of the stress of the bracket and is also a main component for increasing the tangential force reverse acting force of the bracket, so the design consideration is that the anti-falling and anti-skid device is designed in turn from the front to the back.

As shown in fig. 1, 3, 4, 5; the part of the anti-falling and anti-skid device acting on the front end of the base 2 comprises a connecting pin 8, a chain 5 and a connecting head 7; the front end of the base 2 is positioned on the left side and the right side of the base 2 and welded with two connecting cylinders 2-3, two connecting pins 8 are vertically inserted into the connecting cylinders 2-3 respectively, the connecting cylinders 2-3 and the connecting pins 8 are fixed through bolts, the connecting heads 7 are rotatably sleeved on the connecting pins 8, hanging holes are formed in the connecting pins 8, and the hanging hole connecting chains 5 are connected with the scraper plate in a sliding mode.

The front end of the base 2 is close to the scraper and slides forwards, the front end of the base of the traditional support is not provided with a connectable part, and double anti-skid connecting cylinders 2-3 are reserved at the front end part of the base. When the support is used, the support base and the scraper are connected together in a forward sliding mode through the connecting cylinders 2-3, the connector 7, the connecting pin 8, the chain 5 and the like, so that the interaction force is increased, and the support is prevented from sliding downwards.

A tensioning device 6 is also arranged between the front end of the base 2 and the chain 5 connected with the front slide of the scraper, and the tensioning device 6 can adopt an auxiliary adjusting jack.

The part of the anti-falling and anti-skid device, which is used at the tail part of the base 2, comprises a connecting plate 9, the connecting plate 9 is arranged at the tail part of the base 2, pull holes 9-1 are respectively arranged at the left side and the right side of the base 2 on the connecting plate 9, and the pull holes 9-1 are connected with a chain 5 and a scraper blade to be connected in a sliding manner.

Swift current behind the scraper blade is close to the base afterbody, but tradition base rear portion does not have the hookable part, considers with being connected of swift current after, considers the intensity of the height of swift current behind the scraper blade, engaging lug mechanism simultaneously, designs the engaging lug into whole connecting plate structure.

The chain 5 connecting the front end and the tail part of the base 2 is in an outward-expanding shape.

The anti-falling and anti-skid device is used on the middle portion of the base 2 and comprises a bottom adjusting jack 3, the bottom adjusting jack 3 is arranged on one side of the base 2, and the bottom adjusting jack 3 extends out to abut against the base of the adjacent hydraulic support. The bottom adjusting jacks 3 comprise front bottom adjusting jacks 3-2 and rear bottom adjusting jacks 3-1. The middle part of the base is provided with a single-side double-bottom adjusting jack, and during use, the bottom adjusting jack 3 is played to act on the base part of the adjacent support, so that the support is prevented from being extruded. The stress condition is considered in design, and the bottom adjusting devices are evenly distributed on two sides of the gravity center of the support. Meanwhile, considering the problems of fixing one side of the jack and arranging the rubber tube, the front bottom adjusting jack 3-2 is positioned below the front pedal 2-2, the rear bottom adjusting jack 3-1 is positioned below the rear pedal 2-1 and close to one side of the tail part of the base, and the fixed parts of the front bottom adjusting jack 3-2 and the rear bottom adjusting jack 3-1 are all arranged in the supporting sleeve 4, are all arranged in the supporting sleeve 4 and are all arranged in the supporting sleeve 4.

The base part offsets the tangential component force born by part of the supports through the integral anti-slip design from front to back, thereby ensuring the normal support of the supports.

Structural design is carried out on the top beam 1 and the base 2 respectively through the design thought from top to bottom and from front to back, and a complete anti-falling and anti-skid system suitable for supporting of a large-inclination-angle working face is finally formed by matching with forward and backward sliding of a scraper conveyor.

When the geological condition of big inclination, start the support and prevent down anti-skidding system, the concrete mode is as follows:

(1) firstly, double bottom adjusting jacks in the middle of the base 2 are driven out to enhance the interaction force among the supports;

(2) installing a top beam tilting prevention device, and connecting adjacent brackets by connecting jacks to form an organic whole on the working face bracket;

(3) installing an antiskid device at the front end of the base, and connecting the support with the front slide through a chain 5, a connecting pin 8, a connector 7, an auxiliary adjusting jack and other mechanisms;

(4) an anti-skid device at the tail of the base is installed, and the bracket is connected with the backward slide through mechanisms such as a chain 5 and a connecting plate 9;

(5) after the installation is accomplished, three quick-witted equipment of whole working face have formed an organic whole, through the interaction force, have effectively promoted the stability of equipment under the geological condition of big inclination, when the working face inclination resumes normal angle, take off anti-skidding device, normal work can with the support fall-down prevention.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a big inclination working face hydraulic support prevents anti-skidding device that falls, includes hydraulic support's back timber (1) and base (2), its characterized in that: the anti-falling and anti-skid device is sequentially connected with a top beam (1) and a base (2) of adjacent hydraulic supports, and the front end of the base (2) of each hydraulic support is connected with a front slide of a scraper and the tail end of the base is connected with a rear slide of the scraper.

2. The anti-falling and anti-skid device for the hydraulic support with the large inclined working surface as claimed in claim 1, wherein: the anti-falling and anti-skidding device comprises two connecting pins (8), a chain (5) and connectors (7), the two connecting pins (8) are vertically arranged and are respectively positioned on the left side and the right side of the front end of the base (2), the connectors (7) are rotatably sleeved on the connecting pins (8), lifting holes are formed in the connecting pins (8), and the lifting holes are connected with the chain (5) and the scraper plate in a forward sliding manner;

the anti-falling and anti-skidding device further comprises a connecting plate (9), the connecting plate (9) is arranged at the tail of the base (2), pull holes (9-1) are respectively formed in the left side and the right side of the base (2) on the connecting plate (9), and the pull holes (9-1) are connected with the chain (5) and are connected with the scraper in a sliding mode.

3. The anti-falling and anti-skid device for the hydraulic support with the large inclined working surface as claimed in claim 2, wherein: the anti-falling and anti-sliding device comprises a bottom adjusting jack (3), the bottom adjusting jack (3) is arranged on one side of the base (2), and the bottom adjusting jack (3) extends out to abut against the base of the adjacent hydraulic support.

4. The anti-falling and anti-skid device for the hydraulic support with the large inclined working surface as claimed in claim 3, wherein: the bottom adjusting jacks (3) comprise front bottom adjusting jacks (3-2) and rear bottom adjusting jacks (3-1), the front bottom adjusting jacks (3-2) are positioned below the front foot pedals (2-2), and the rear bottom adjusting jacks (3-1) are positioned below the rear foot pedals (2-1) and close to one side of the tail of the base.

5. The anti-falling and anti-skid device for the hydraulic support with the large inclined working surface as claimed in claim 4, wherein: the front bottom adjusting jack (3-2) and the rear bottom adjusting jack (3-1) are both arranged in the supporting sleeve (4).

6. The anti-falling and anti-skid device for the hydraulic support with the large inclined working surface as claimed in claim 1, wherein: the anti-falling and anti-skidding device comprises a pin shaft (10), a sleeve (11) and a connecting jack, the pin shaft (10) is extended out of the beam bottom of the top beam (1), the pin shaft (10) is sleeved with the rotatable sleeve (11), lug plates are respectively arranged on the sleeve (11) in the radial direction and the front and the back of the sleeve, and the lug plates are connected with the top beams of the front and the back hydraulic supports through the connecting jack.

7. The anti-falling and anti-skid device for the hydraulic support with the large inclined working surface as claimed in claim 6, wherein: the pin shaft (10) is positioned between the front column socket and the rear column socket of the top beam (1).

8. The anti-falling and anti-skid device for the hydraulic support with the large inclined working surface as claimed in claim 2, wherein: the chain (5) connecting the front end and the tail part of the base (2) is in an outward-opening shape.

9. The anti-falling and anti-skid device for the hydraulic support with the large inclined working surface as claimed in claim 2, wherein: and a tensioning device (6) is also arranged between the front end of the base (2) and the chain (5) connected with the front slide of the scraper.