CN114922048A

CN114922048A - Lifting pedestrian bridge of transfer conveyor of fully mechanized coal mining face of coal mine

Info

Publication number: CN114922048A
Application number: CN202210467712.9A
Authority: CN
Inventors: 刘顺义; 李伟东; 汪义龙; 沙兴锋; 孙晓虎; 孟鹏飞; 王耀辉; 郭孝琛; 高健勋
Original assignee: Huaneng Coal Technology Research Co Ltd
Current assignee: Huaneng Coal Technology Research Co Ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-08-19

Abstract

The invention provides a lifting pedestrian bridge of a transfer conveyor of a fully mechanized coal mining face, relates to the technical field of safety guarantee of coal mining, and aims to solve the problem that the passing of a pedestrian is influenced when the height of an end hydraulic support is reduced in the prior art. The lifting pedestrian bridge of the transfer conveyor of the fully mechanized coal mining face comprises a bridge body, wherein the bridge body is connected with a lifting driving mechanism, the bridge body is fixedly connected with a handrail, and the lifting driving mechanism is configured to be installed on a main coal baffle. The lifting type pedestrian bridge crossing of the fully mechanized coal mining face transfer conveyor can reserve enough space for personnel to pass through, and prevents the head of a pedestrian from colliding with the end hydraulic support when the pedestrian passes through.

Description

Lifting pedestrian bridge of transfer conveyor of fully mechanized coal mining face of coal mine

Technical Field

The invention relates to the technical field of safety guarantee of coal mining, in particular to a lifting pedestrian bridge of a transfer conveyor of a fully mechanized coal mining face.

Background

When the pressure of the top plate is higher, the height of the end hydraulic support is insufficient, so that the difficulty of an operator is increased from a fixed gap bridge or the operator directly crosses over the reversed loader. If the reversed loader conveyer runs, personal injury accidents easily occur when people cross the reversed loader; or when the pedestrian needs to pass through, the pedestrian can pass through after the stop. If the coal mining equipment is stopped out of sequence, coal piling accidents easily occur at each transfer coal unloading point, and the starting rate is influenced.

Disclosure of Invention

The invention aims to provide a lifting type pedestrian bridge crossing of a coal mine fully-mechanized mining face transfer conveyor, and the lifting type pedestrian bridge crossing is used for solving the technical problem that in the prior art, when the height of an end hydraulic support is reduced, the pedestrian bridge crossing is influenced.

The invention provides a lifting pedestrian bridge of a transfer conveyor of a fully mechanized coal mining face.

The lifting type pedestrian bridge crossing conveyor for the fully mechanized coal mining face has the beneficial effects that:

the lifting driving mechanism is arranged to drive the bridge body, so that when a pedestrian needs to pass through, the height of the bridge body can be reduced, and a sufficient space is reserved between the bridge body and the upper end hydraulic support for the pedestrian to pass through; when the passenger does not need to pass through, the bridge body can be lifted, so that more space for transporting coal is reserved for the transfer conveyor below. And the handrail which is fixedly connected is arranged, so that the pedestrian can be prevented from falling off from the bridge body when passing through, and the safety is improved. Moreover, if the end hydraulic support is increased by the pressure of the top plate and is reduced, the position of the bridge body driven by the lifting driving mechanism can be further reduced, so that the end hydraulic support is prevented from colliding with the head top when a pedestrian passes through the space enough for the personnel.

In a preferred technical solution, the armrest includes an upright rod portion, the edge of the upper surface of the bridge body is fixedly connected with a plurality of fixing columns, the fixing columns and the upright rod portion are fixed by first connecting pins, first mounting holes are provided in both the upright rod portion and the fixing columns for the first connecting pins to be inserted into, and at least one of the upright rod portion and the fixing columns has a plurality of first mounting holes.

Through set up a plurality of first mounting holes at fixed column and pole setting portion at least one to insert first connecting pin, can make pole setting portion can be fixed by first connecting pin in a plurality of positions for the fixed column, thereby make the handrail have different heights for the pontic, so that satisfy the protection demand under the different condition of passing through.

In the preferred technical scheme, the two groups of lifting driving mechanisms are respectively positioned at the outer sides of the main coal blocking plates at the two sides of the transfer conveyor.

The lifting mechanisms are arranged on two sides of the main coal baffle plate, so that two ends of the bridge body are stressed together and move when the bridge body is lifted, the lifting stability of the bridge body is improved, and the condition that the other end of the bridge body is overloaded in the scheme of one end stress is avoided.

In a preferred technical scheme, the lifting driving mechanism comprises a fluid pressure type working cylinder; one end of the fluid pressure working cylinder is hinged with the bridge body, and the other end of the fluid pressure working cylinder is hinged with the outer side of the main coal baffle plate.

The fluid pressure type working cylinder is adopted for lifting, the action is stable, and the output acting force is large. And the two ends of the fluid pressure type working cylinder are hinged with the bridge body and the main coal baffle plate, so that the degree of freedom constraint on the fluid pressure type working cylinder can be reduced, and the phenomenon that the fluid pressure type working cylinder bears overlarge lateral force due to the fact that the lifting direction is not strictly consistent with the telescopic direction of the fluid pressure type working cylinder in the movement process is avoided.

In the preferable technical scheme, the coal mine underground coal.

The lifting guide mechanisms are arranged on the outer sides of the main coal blocking plates on each side, the lifting guide mechanisms can control the vertical movement direction of the bridge body to bear horizontal acting force, the lateral load of the fluid pressure type working cylinder is reduced, and the movement stability of the bridge body is improved.

In a preferred technical scheme, the lifting guide mechanism comprises a first guide rail and a second guide rail, the bottom of the first guide rail is inserted into a guide cavity of the second guide rail and is rotatably provided with a roller, the roller is in rolling friction connection with the inner wall of the guide cavity of the second guide rail, the first guide rail is fixedly connected with the bridge body, and the second guide rail is configured to be fixedly connected with the main coal blocking plate.

The bottom of the first guide rail is provided with the roller, the roller is connected with the inner wall of the guide cavity of the second guide rail in a rolling friction mode, so that the resistance to relative movement of the first guide rail and the second guide rail can be reduced, the bottom of the first guide rail cannot shake relative to the second guide rail, and the lifting stability of the bridge body is improved.

In a preferred technical scheme, the first guide rail is further fixedly connected with an auxiliary coal baffle, and the auxiliary coal baffle is located on the inner side face of the main coal baffle.

The auxiliary coal baffle can rise together with the bridge body when the bridge body is lifted, and when the reversed loader conveys materials, the auxiliary coal baffle positioned at a higher position and the main coal baffle positioned at a lower position jointly prevent the materials from splashing and scattering outwards, so that the loss of material conveying is reduced. Moreover, the auxiliary coal baffle is arranged on the inner side surface of the main coal baffle, so that even if materials splash and fall onto the surface of the auxiliary coal baffle, the materials fall onto the inner side of the main coal baffle when falling off from the auxiliary coal baffle, and cannot be lost.

In the preferred technical scheme, the bridge further comprises a ladder, wherein the ladder is fixedly connected to two ends of the bridge in the length direction and detachably connected with the bridge.

Through setting up the ladder, the operating personnel of being convenient for climb the ladder and come on the pontic and cross the conveying mechanism of elevating conveyor, improved the operating personnel and used the colliery to combine to adopt the convenience that working face elevating pedestrian crossed the bridge. The ladder is detachably connected with the bridge body, so that the ladder can be detached from the bridge body when the lifting driving mechanism and the lifting guide mechanism are required to be maintained, and the convenience of maintaining the lifting type pedestrian crossing bridge of the fully mechanized coal mining face transfer conveyor is improved.

In the preferred technical scheme, the otic placode subassembly is installed to the pontic, the otic placode subassembly includes the otic placode body, set up two at least second mounting holes of vertically arranging along on the otic placode body, the top of ladder through two at least second connecting pins with the connection can be dismantled to the otic placode subassembly, one side of ladder the quantity less than or equal to one of second connecting pin on the otic placode body the quantity of second mounting hole.

The adoption sets up two at least second mounting holes on the otic placode body, cooperates two at least second connecting pins, can carry out the location of two points at least to the pole setting of every side of ladder, after the second connecting pin is installed, can prevent that the ladder from swinging in vertical plane, when avoiding the workman to climb the ladder, the ladder perpendicular to rocks from the facade of place, has improved the security of workman climbing.

Drawings

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

Fig. 1 is a schematic structural diagram of a lifting pedestrian bridge of a transfer conveyor on a fully mechanized coal mining face according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a lifting pedestrian bridge of a transfer conveyor on a fully mechanized coal mining face of a coal mine provided by an embodiment of the invention when a bridge body is lowered;

fig. 3 is a schematic structural diagram of another implementation manner of the lifting pedestrian bridge of the coal mine fully mechanized coal mining face transfer conveyor according to the first embodiment of the present invention;

fig. 4 is an application scene intention of the lifting pedestrian crossing bridge of the coal mine fully mechanized mining face transfer conveyor according to the first embodiment of the invention.

Description of reference numerals:

10-a bridge; 11-fixed columns; 12-an ear plate assembly; 13-a first mounting hole; 20-a handrail; 21-a crossbar portion; 22-a stem portion; 23-a first connecting pin; 30-a lifting drive mechanism; 40-a lifting guide mechanism; 41-a first guide rail; 42-a second guide rail; 43-a roller; 50-auxiliary coal baffle; 60-a ladder; 61-a second connecting pin; 99-a primary coal deflector; 100-lifting pedestrian bridge crossing of a transfer conveyor on a fully mechanized coal mining face; 200-end hydraulic support.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The first embodiment is as follows:

fig. 1 is a schematic structural view of a lifting pedestrian bridge of a transfer conveyor on a fully mechanized coal mining face according to an embodiment of the present invention; fig. 2 is a schematic structural diagram of a lifting pedestrian bridge of a fully mechanized coal mining face transfer conveyor provided by the first embodiment of the invention when a bridge body is lowered; fig. 4 is an application scene intention of the lifting pedestrian bridge of the transfer conveyor of the coal mine fully mechanized mining face according to the first embodiment of the invention. As shown in fig. 1-2 and 4, the liftable pedestrian bridge 100 of the coal mine fully mechanized mining face transfer conveyor provided by this embodiment includes a bridge 10, the bridge 10 is connected to a lifting driving mechanism 30, the bridge 10 is fixedly connected to a handrail 20, and the lifting driving mechanism 30 is configured to be mounted on a main coal baffle 99.

The lifting driving mechanism 30 is arranged to drive the bridge body 10, so that when a pedestrian needs to pass through, the height of the bridge body 10 can be reduced, and the bridge body 10 and the upper end hydraulic support can leave a sufficient space for the pedestrian to pass through; when no pedestrian passes through the transfer conveyor, the bridge body 10 can be lifted, so that more space for transporting coal is reserved for the transfer conveyor below. And the fixedly connected handrail 20 is arranged, so that the pedestrian can be prevented from falling off the bridge body 10 when passing through, and the safety is improved. As shown in fig. 4, when the pressure of the top plate is large, the height of the hydraulic head support 200 is insufficient, so that it is difficult for the operator to pass through the fixed bridge or the operator to directly cross the reversed loader. And this embodiment has adopted foretell colliery to combine to adopt working face reprint conveyer pedestrian to cross bridge 100, drives the pontic 10 through adopting lift actuating mechanism 30, when end hydraulic support 200 descends, thereby can suitably reduce the pontic 10 for personnel through keeping enough space, guarantee personnel's sufficient height of passing through, head top collides with end hydraulic support when avoiding personnel to pass through.

The fixed connection of the bridge 10 to the handrail 20 is not limited to the fact that the handrail 20 must be destructively removed after being installed on the bridge 10 to be separated from the bridge 10, but rather, during operation, the handrail 20 is fixed relative to the bridge 10 and does not move relative to the bridge 10, and can move relative to the bridge when the height of the handrail 20 needs to be adjusted.

As shown in fig. 1 to 2, it is preferable that the handle 20 includes a vertical rod portion 22, a plurality of fixing posts 11 are fixedly connected to an edge of an upper surface of the bridge 10, the fixing posts 11 and the vertical rod portion 22 are fixed by first connecting pins 23, first mounting holes 13 are provided in both the vertical rod portion 22 and the fixing posts 11 for the first connecting pins 23 to be inserted into, and at least one of the vertical rod portion 22 and the fixing posts 11 has a plurality of first mounting holes 13.

Specifically, in the present embodiment, the handrail 20 includes an upright rod portion 22 and a crossbar portion 21, and both ends of the crossbar portion 21 are connected to the upright rod portion 22. The upright rod part 22 is provided with one first mounting hole 13, the fixed column 11 is provided with a plurality of first mounting holes 13, and the upright rod part 22 and the fixed column 11 can be fixed at different relative positions by aligning the first mounting holes 13 of the upright rod part 22 with different first mounting holes 13 of the fixed column 11 and inserting the first connecting pins 23. The first connecting pin 23 may be a solid rod, through holes penetrating in the radial direction are formed at two ends of the solid rod, and a cotter pin is inserted into the through holes, so that the first connecting pin 23 is fixed to the vertical rod portion 22 and the fixing column 11 along the length thereof. Alternatively, the first connecting pin 23 may be a bolt or a screw, and a nut may be screwed to the first mounting hole 13. It may also serve the basic function of a pin. The fixing post 11 may be a hollow post, the vertical rod 22 and the horizontal rod 21 may be 2 ″ steel pipes, the vertical rod 22 may be inserted into the fixing post 11, and the outer diameter of the vertical rod 22 may substantially match the inner diameter of the fixing post 11.

By providing a plurality of first mounting holes 13 in at least one of the fixed column 11 and the upright rod portion 22 for inserting the first connecting pins 23, the upright rod portion 22 can be fixed by the first connecting pins 23 at a plurality of positions relative to the fixed column 11, so that the armrest 20 has different heights relative to the bridge 10, thereby meeting the protection requirements under different passing conditions.

Of course, in another implementation, a plurality of first mounting holes 13 may be provided on the upright rod portion 22, and one first mounting hole 13 may be provided on the fixed column 11, which has the same effect as the solution in the above embodiment. Further, it is possible to adopt a configuration in which the upright bar portion 22 and the fixed post 11 are provided with the plurality of first mounting holes 13, but the pitch between the first mounting holes 13 is different between the upright bar portion and the fixed post 11, and for example, the pitch between the plurality of first mounting holes 13 on the fixed post 11 may be 100mm, and the pitch between the plurality of first mounting holes 13 on the upright bar portion 22 may be 80mm, so that a greater variety of heights of the armrests 20 can be combined.

In addition, in another implementation, the inside diameter of the upright part 22 may be equal to or slightly larger than the outside diameter of the fixed column 11, and the upright part 22 is sleeved on the outside of the fixed column 11, so that substantially the same effect can be achieved. Alternatively, the upright portion 22 and the fixed post 11 are not nested, but are arranged side by side.

As shown in fig. 1-2, preferably, the lifting drive mechanisms 30 are provided in two sets, respectively located outside the main coal deflector 99 on both sides of the transfer conveyor.

The outer side of the main coal baffle 99 refers to a side of each main coal baffle 99 away from the conveying mechanism of the transfer conveyor, and the inner side of the main coal baffle 99 refers to a side of the main coal baffle 99 facing the conveying mechanism of the transfer conveyor.

The lifting mechanisms are arranged on two sides of the main coal baffle plate 99, so that two ends of the bridge 10 are stressed together and move when the bridge is lifted, the lifting stability of the bridge 10 is improved, and the condition that the other end of the bridge is overloaded in a scheme with one end stressed is avoided.

Fig. 3 is a schematic structural diagram of another implementation manner of the lifting pedestrian bridge of the transfer conveyor of the coal mine fully mechanized coal mining face according to the first embodiment of the present invention; as shown in fig. 1 to 3, preferably, the elevating driving mechanism 30 includes a fluid pressure type operating cylinder; one end of the fluid pressure cylinder is hinged to the bridge 10 and the other end is configured to be hinged to the outside of the main coal deflector 99.

The fluid pressure type working cylinder in this embodiment may be an oil cylinder, and the oil cylinder may be installed in a manner as shown in fig. 1 and 2, in which the cylinder body is at the lower portion, the piston rod is at the upper portion, and the piston rod extends upward. It is also possible that the cylinder is in the upper part and the piston rod in the lower part, the piston rod extending downwards, as shown in fig. 3. And the two ends of the fluid pressure type working cylinder are respectively connected with the bridge body 10 and the main coal baffle plate 99 through hinged seats.

The fluid pressure type working cylinder is adopted for lifting, the action is stable, and the output acting force is large. And the two ends of the fluid pressure type working cylinder are hinged with the bridge body 10 and the main coal baffle plate 99, so that the degree of freedom constraint on the fluid pressure type working cylinder can be reduced, and the phenomenon that the fluid pressure type working cylinder bears overlarge lateral force due to the fact that the lifting direction is not strictly consistent with the stretching direction of the fluid pressure type working cylinder in the movement process is avoided.

In addition, in another implementation manner, the fluid pressure type working cylinder can also be an air cylinder, but if the air cylinder is selected, an air passage needs to be equipped for the air cylinder, and the applicability is inferior to that of an oil cylinder.

As shown in fig. 1-2, it is preferable that the lifting and lowering device 40 is further included, and the lifting and lowering device 40 is disposed outside the main coal blocking plate 99 on each side of the transfer conveyor.

A guide driving mechanism is provided outside each main coal baffle 99, and an elevation guide mechanism 40 is provided on the upstream side and the downstream side in the conveying direction of the guide-driven conveyor.

The lifting guide mechanism 40 is arranged on the outer side of the main coal baffle plate 99 on each side, the lifting guide mechanism 40 can control the vertical movement direction of the bridge 10 to bear horizontal acting force, the side load of the fluid pressure type working cylinder is reduced, and the movement stability of the bridge 10 is improved.

As shown in fig. 1-2, preferably, the elevating guide mechanism 40 includes a first guide rail 41 and a second guide rail 42, a bottom of the first guide rail 41 is inserted into a guide cavity of the second guide rail 42 and rotatably mounted with a roller 43, the roller 43 is in rolling friction connection with an inner wall of the guide cavity of the second guide rail 42, the first guide rail 41 is fixedly connected with the bridge 10, and the second guide rail 42 is configured to be fixedly connected with the main coal blocking plate 99.

The top of the first guide rail 41 is fixedly connected with the bridge 10, and the second guide rail 42 is fixedly connected with the main coal baffle 99. The second guide rail 42 has a guide cavity, and a through hole is formed in a top cover of the guide cavity to accommodate the first guide rail 41 to pass through. And the bottom of the first guide rail 41 is provided with rollers 43 on both sides thereof, which are respectively connected with both side walls of the guide cavity of the second guide rail 42 in a rolling manner.

By arranging the roller 43 at the bottom of the first guide rail 41 and utilizing the rolling friction connection between the roller 43 and the inner wall of the guide cavity of the second guide rail 42, the resistance of the relative movement between the first guide rail 41 and the second guide rail 42 can be reduced, and the bottom of the first guide rail 41 can not shake relative to the second guide rail 42, so that the lifting stability of the bridge 10 is improved.

As shown in fig. 1-2, preferably, the first guide rail 41 is further fixedly connected with an auxiliary coal deflector 50, and the auxiliary coal deflector 50 is located on the inner side surface of the main coal deflector 99.

The auxiliary coal baffle 50 may be fixedly connected to the first guide rail 41 through a connecting rod and a reinforcing rib.

The auxiliary coal baffle 50 can ascend together with the bridge body 10 when the bridge body 10 is lifted, and when the reversed loader conveys materials, the auxiliary coal baffle 50 at the higher position and the main coal baffle 99 at the lower position jointly prevent the materials from splashing and scattering outwards, so that the loss of material conveying is reduced. Moreover, the auxiliary coal baffle 50 is arranged on the inner side surface of the main coal baffle 99, so that even if materials splash and fall on the surface of the auxiliary coal baffle 50 and then fall off from the auxiliary coal baffle 50, the materials also fall on the inner side of the main coal baffle 99, and the materials cannot be lost.

As shown in fig. 1-2, it is preferable that a ladder 60 is further included, and the ladder 60 is fixedly connected to both ends of the bridge 10 in the length direction and detachably connected to the bridge 10.

By arranging the ladder 60, the operator can conveniently climb the ladder 60 to the bridge body 10 to cross the conveying mechanism of the reversed loader, and the convenience of the operator for using the lifting type pedestrian crossing bridge 100 of the reversed loader on the coal mine fully mechanized coal mining face is improved. The ladder 60 is detachably connected with the bridge body 10, and when the lifting driving mechanism 30 and the lifting guide mechanism 40 need to be maintained, the ladder 60 can be detached from the bridge body 10, so that the convenience of maintaining the lifting pedestrian bridge 100 of the transfer conveyor of the fully mechanized coal mining face is improved.

As shown in fig. 1-2, preferably, the bridge 10 is provided with an ear plate assembly 11, the ear plate assembly 11 includes an ear plate body, at least two second mounting holes are formed in the ear plate body, the second mounting holes are longitudinally arranged, the top of the ladder 60 is detachably connected to the ear plate assembly 11 through at least two second connecting pins 61, and the number of the second connecting pins 61 on one side of the ladder 60 is less than or equal to the number of the second mounting holes on one ear plate body.

In particular, in this embodiment, the uprights of each side of the ladder 60 are connected to one of the lug plate assemblies 11, each lug plate assembly 11 comprising two lug plates. Two second mounting holes which are arranged along the vertical direction are formed in each ear plate body, and the second mounting holes of the two ear plate bodies on one ear plate assembly 11 correspond to each other. The second connecting pin 61 may be a solid rod, and through holes penetrating in the radial direction are formed at both ends of the solid rod, and a cotter pin is inserted into the through holes, so as to fix the ladder 60 and the ear plate body to each other in the length direction of the second connecting pin 61. Alternatively, the second connecting pin 61 may be a bolt or a screw, and a nut may be screwed to the second mounting hole. It may also serve the basic function of a pin.

In other implementations, the number of the second mounting holes provided on the ear plate body and the upright on each side of the ladder 60 may be three, two of which are pierced with the second connecting pins 61, and substantially the same function may be achieved. Alternatively, in order to increase the rigidity of the connection, three second mounting holes may be provided for each ear plate body and the upright on each side of the ladder 60, and three second connecting pins 61 are correspondingly inserted for fixing.

The adoption sets up two at least second mounting holes on the otic placode body, cooperates two at least second connecting pins 61, can carry out the location of two at least points to the pole setting of ladder 60 every side, after second connecting pin 61 is installed, can prevent that ladder 60 from swinging in vertical plane, when avoiding the workman to scramble ladder 60, ladder 60 perpendicular to rocks from the place facade, has improved the security of workman's climbing.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, 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, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

In the above embodiments, the descriptions of the orientations such as "up", "down", and the like are based on the drawings.

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 lifting type pedestrian bridge (100) is characterized by comprising a bridge body (10), wherein the bridge body (10) is connected with a lifting driving mechanism (30), the bridge body (10) is fixedly connected with a handrail (20), and the lifting driving mechanism (30) is configured to be installed on a main coal blocking plate (99).

2. The coal mine fully mechanized mining face elevating pedestrian bridge (100) according to claim 1, wherein the handrail (20) includes a vertical rod portion (22), a plurality of fixing columns (11) are fixedly connected to an edge of an upper surface of the bridge body (10), the fixing columns (11) and the vertical rod portion (22) are fixed by first connecting pins (23), first mounting holes (13) are formed in both the vertical rod portion (22) and the fixing columns (11) for the first connecting pins (23) to be inserted into, and at least one of the vertical rod portion (22) and the fixing columns (11) has a plurality of the first mounting holes (13).

3. The elevating pedestrian bridge (100) of the fully mechanized coal mining face of the coal mine, according to claim 1, wherein the elevating drive mechanisms (30) are provided in two groups, respectively, outside the main coal blocking plates (99) on both sides of the transfer conveyor.

4. The coal mine fully mechanized mining face transloading conveyor elevating pedestrian bridge (100) according to claim 3, wherein the elevating drive mechanism (30) includes a fluid pressure type working cylinder; one end of the fluid pressure working cylinder is hinged with the bridge body (10), and the other end of the fluid pressure working cylinder is hinged with the outer side of the main coal baffle plate (99).

5. The coal mine fully mechanized mining face transloading conveyor lifting pedestrian bridge (100) according to claim 3, further comprising a lifting guide mechanism (40), wherein the lifting guide mechanism (40) is arranged at the outer side of the main coal baffle plate (99) at each side of the transloading conveyor.

6. The coal mine fully mechanized mining face elevating pedestrian bridge (100) of claim 5, wherein the elevating guide mechanism (40) comprises a first guide rail (41) and a second guide rail (42), the bottom of the first guide rail (41) is inserted into a guide cavity of the second guide rail (42) and is rotatably provided with a roller (43), the roller (43) is in rolling friction connection with the inner wall of the guide cavity of the second guide rail (42), the first guide rail (41) is fixedly connected with the bridge body (10), and the second guide rail (42) is configured to be fixedly connected with the main coal blocking plate (99).

7. The coal mine fully mechanized mining face transloading conveyor lifting pedestrian bridge (100) according to claim 6, wherein the first guide rail (41) is further fixedly connected with an auxiliary coal baffle (50), and the auxiliary coal baffle (50) is positioned on the inner side surface of the main coal baffle (99).

8. The coal mine fully mechanized mining face transfer conveyor lifting pedestrian bridge (100) according to claim 1, further comprising a ladder (60), wherein the ladder (60) is fixedly connected to two ends of the bridge body (10) in the length direction and detachably connected to the bridge body (10).

9. The coal mine fully mechanized mining face elevating pedestrian bridge (100) of claim 8, wherein the bridge body (10) is provided with an ear plate assembly (11), the ear plate assembly (11) comprises an ear plate body, at least two second mounting holes longitudinally arranged are formed in the ear plate body, the top of the ladder (60) is detachably connected with the ear plate assembly (11) through at least two second connecting pins (61), and the number of the second connecting pins (61) on one side of the ladder (60) is less than or equal to one of the number of the second mounting holes in the ear plate body.