CN217558364U - Four-column caving coal hydraulic support rear column limiting protection device - Google Patents

Abstract

The embodiment of the utility model relates to a hydraulic support technical field, concretely relates to spacing protection device of four post caving coal hydraulic support rear column, it includes the base, the top of base is connected with the back timber through back timber front column and back timber rear column, the top of base is connected with the shield roof beam through the front and back connecting rod, be provided with stop gear between back timber and the shield roof beam. The utility model has the advantages that: when the device is in actual use, the second lug plate and the first lug plate are limited through the limiting plate, so that the first connecting shaft is abutted against one end of the sliding groove, the reduction of an included angle between the top beam and the shield beam is avoided, the limiting work between the top beam and the shield beam is realized, and the back upright post of the top beam is prevented from being pulled up; and the stop block can be placed in the sliding groove, so that the supporting distance between the limiting plate and the first connecting shaft and the supporting distance between the limiting plate and the second connecting shaft are changed, and the limiting work of the top beam and the shield beam in different included angle states is realized through the limiting plate and the stop block.

Description

Four-column caving coal hydraulic support rear column limiting protection device

Technical Field

The utility model relates to a hydraulic support technical field, concretely relates to four post caving coal hydraulic support rear column limit protection device.

Background

In the fully mechanized caving working face, the hydraulic support for caving the top coal is the core equipment of the fully mechanized caving process, and is the key for ensuring the smooth operation of the fully mechanized caving.

The four-column hydraulic support for caving the top coal is the support with the largest number of use at present due to the advantages of wide pedestrian space, large ventilation section and the like. However, in the fully mechanized caving face, due to the influence of coal caving factors, a headspace appears above a rear upright post of the four-post top coal caving hydraulic support or the pressure is reduced, so that the stress on front and rear upright posts of the four-post top coal caving hydraulic support is unbalanced, and the support capability cannot be effectively exerted. Especially in the face of mining or finding the bottom along the top excavation, the coal jacking and resultant force action point antedisplacement of four post top caving coal hydraulic support top, cause back timber front column atress big more easily, back timber rear column atress is little for the angle between back timber and the shield roof beam reduces, the condition that back timber rear column was pulled up appears even, can cause back timber rear column cap round pin axle to be pulled apart when serious, the fixed dog of cylinder bottom clamp plate is pulled off or the spacing ear nest in cylinder bottom is pulled apart the consequence, seriously influence the normal production and the safety of working face.

Therefore, a rear upright post limit protection device of a four-post caving coal hydraulic support is needed to overcome the problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the embodiment of the utility model provides a four post caving coal hydraulic support rear column limit protection device has realized the purpose of solving the problem of proposing in the background art.

The embodiment of the utility model provides a in order to realize above-mentioned purpose, specifically adopt following technical scheme: a rear upright post limiting and protecting device of a four-post top coal caving hydraulic support comprises a base, wherein the top of the base is connected with a top beam through a top beam front upright post and a top beam rear upright post, the top of the base is connected with a shield beam through a front connecting rod and a rear connecting rod, and a limiting mechanism is arranged between the top beam and the shield beam; stop gear includes fixed connection at the inside second otic placode of shield beam, fixed connection second connecting axle on the second otic placode, rotates and sets up at the outside limiting plate of second connecting axle, set up in the inside spout of limiting plate, fixed connection at the inside first otic placode of back timber, fixed connection just slide and set up at the inside first connecting axle of spout, set up the dog inside the spout on first otic placode.

As a further improvement of the above technical solution:

and a limiting block for limiting the stop block is arranged outside the limiting plate.

The limiting block comprises a main body and an extension block arranged in the main body through a first bolt.

The limiting block and the stop block are fixedly connected through a second bolt.

One end of the check block is provided with an arc-shaped part, and the other end of the check block is provided with an arc-shaped groove matched with the shape and the size of the arc-shaped part.

The shape and size of the arc-shaped part are matched with the shape and size of the end part of the sliding chute.

The embodiment of the utility model provides a beneficial effect does:

when the device is in actual use, the second lug plate and the first lug plate are limited through the limiting plate, so that the first connecting shaft is abutted against one end of the sliding groove, namely the first connecting shaft and the second connecting shaft are supported, the reduction of an included angle between the top beam and the shield beam is avoided, the limiting work between the top beam and the shield beam is realized, and the rear upright post of the top beam is prevented from being pulled out; the stop block can be placed in the sliding groove, so that the supporting distance of the limiting plate between the first connecting shaft and the second connecting shaft is changed, namely, the limiting work of the top beam and the shield beam under different included angles is realized through the limiting plate and the stop block;

the limiting block is buckled at the top of the limiting plate, so that the limiting block can shield the sliding groove, the limiting block can limit the stop block, and the stop block can be prevented from falling from the sliding groove in the limiting plate; the stopper is being carried out spacing to the dog, is being connected the stopper through the second bolt with the dog that is located a plurality of dog intermediate positions, then pulls out the extension piece from the main part then through first bolt fastening, can carry on spacingly to a plurality of dogs through the stopper.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the limiting mechanism of the present invention;

FIG. 3 is a schematic structural view of the first viewing angle at the position of the limiting block of the present invention;

fig. 4 is a schematic structural view of a second visual angle at the position of the limiting block of the present invention;

fig. 5 is a schematic structural view of the stopper of the present invention.

In the figure: 1. a base; 2. a top beam front column; 3. a top beam rear column; 4. a top beam; 5. a front and a rear connecting rods; 6. covering the beam; 7. a limiting mechanism; 71. a first ear plate; 72. a first connecting shaft; 73. a second ear plate; 74. a second connecting shaft; 75. a limiting plate; 76. a chute; 77. a stopper; 8. a limiting block; 81. a main body; 82. a first bolt; 83. a lengthening block; 9. a second bolt; 10. an arcuate portion; 11. an arc-shaped groove.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

Referring to fig. 1 to 5, the embodiment of the utility model discloses a four-column top coal caving hydraulic support rear column limit protection device, which comprises a base 1, wherein the top of the base 1 is connected with a top beam 4 through a top beam front column 2 and a top beam rear column 3, the top of the base 1 is connected with a shield beam 6 through a front connecting rod and a rear connecting rod 5, and a limit mechanism 7 is arranged between the top beam 4 and the shield beam 6;

in actual use, the top beam 4 is adjusted through the top beam front upright post 2 and the top beam rear upright post 3, the shield beam 6 is adjusted through the front and rear connecting rods 5 (the technology is mature in the prior art, and therefore detailed description is not needed), and the angle between the top beam 4 and the shield beam 6 is limited through the limiting mechanism 7, so that the top beam rear upright post 3 is prevented from being pulled up;

the limiting mechanism 7 comprises a second lug plate 73 fixedly connected inside the shield beam 6, a second connecting shaft 74 fixedly connected on the second lug plate 73, a limiting plate 75 rotatably arranged outside the second connecting shaft 74, a sliding chute 76 arranged inside the limiting plate 75, a first lug plate 71 fixedly connected inside the top beam 4, a first connecting shaft 72 fixedly connected on the first lug plate 71 and slidably arranged inside the sliding chute 76, and a stop dog 77 arranged inside the sliding chute 76;

in practical use, the second lug plate 73 and the first lug plate 71 are limited by the limiting plate 75, so that the first connecting shaft 72 abuts against one end of the sliding groove 76, namely the first connecting shaft 72 and the second connecting shaft 74 are supported, the reduction of the included angle between the top beam 4 and the shield beam 6 is avoided, the limiting work between the top beam 4 and the shield beam 6 is realized, and the pulling-up of the top beam rear upright 3 is avoided; and the stopper 77 can be placed in the sliding groove 76, so that the supporting distance between the limiting plate 75 and the first connecting shaft 72 and the second connecting shaft 74 is changed, namely, the limiting work of the top beam 4 and the shield beam 6 in different included angle states is realized through the limiting plate 75 and the stopper 77.

As further illustration of the present application: a limiting block 8 for limiting the stopper 77 is arranged outside the limiting plate 75; the stop block 8 comprises a main body 81, an extension block 83 arranged inside the main body 81 through a first bolt 82; the limiting block 8 and the stop block 77 are fixedly connected through a second bolt 9; the limiting block 8 is buckled at the top of the limiting plate 75, so that the limiting block 8 shields the sliding groove 76, the limiting block 8 limits the stop block 77, and the stop block 77 is prevented from falling from the sliding groove 76 in the limiting plate 75; when the stopper 77 is limited by the stopper 8, the stopper 8 is connected with the stopper 77 located at the middle position of the stoppers 77 through the second bolt 9, and then the extension block 83 is pulled out of the main body 81 and fixed by the first bolt 82, so that the stoppers 77 can be limited by the stopper 8.

As further illustration of the present application: one end of the block 77 is provided with an arc part 10, and the other end of the block 77 is provided with an arc groove 11 matched with the arc part 10 in shape and size, so that the blocks 77 can be spliced and aligned; the size of the arc-shaped part 10 is matched with the size of the end part of the sliding chute 76, so that the stop 77 can be attached to one end of the sliding chute 76 in actual use.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus.

So far, the technical solution of the present invention has been described with reference to the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, a person skilled in the art can make equivalent changes or substitutions to the related technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims (6)

1. A four-column top coal caving hydraulic support rear column limiting protection device comprises a base (1), wherein the top of the base (1) is connected with a top beam (4) through a top beam front column (2) and a top beam rear column (3), the top of the base (1) is connected with a shield beam (6) through a front connecting rod and a rear connecting rod (5), and the four-column top coal caving hydraulic support rear column limiting protection device is characterized in that a limiting mechanism (7) is arranged between the top beam (4) and the shield beam (6);

stop gear (7) include fixed connection at the inside second otic placode (73) of shield roof beam (6), second connecting axle (74) of fixed connection on second otic placode (73), rotate and set up limiting plate (75) outside second connecting axle (74), set up spout (76) inside limiting plate (75), fixed connection is at the inside first otic placode (71) of back timber (4), fixed connection just slides on first otic placode (71) and sets up first connecting axle (72) inside spout (76), set up dog (77) inside spout (76).

2. The rear upright post limit protection device of the four-post caving coal hydraulic support according to claim 1, characterized in that a limit block (8) for limiting a stop block (77) is arranged outside the limit plate (75).

3. The rear pillar position-limiting protection device of the four-pillar hydraulic support for caving coal according to claim 2, wherein the position-limiting block (8) comprises a main body (81), and an extension block (83) arranged inside the main body (81) through a first bolt (82).

4. The rear pillar position-limiting protection device of the four-pillar hydraulic support for caving coal according to claim 2, wherein the position-limiting block (8) and the stop block (77) are fixedly connected by a second bolt (9).

5. The rear upright post limit protector of the four-post hydraulic top coal caving bracket according to claim 1, characterized in that one end of the block (77) is provided with an arc-shaped part (10), and the other end of the block (77) is provided with an arc-shaped groove (11) matched with the arc-shaped part (10) in shape and size.

6. The rear pillar position-limiting protection device of the four-pillar hydraulic support for caving coal according to claim 5, wherein the shape and size of the arc-shaped part (10) is matched with the shape and size of the end part of the chute (76).

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