CN215629287U

CN215629287U - Liftable pedestrian bridge

Info

Publication number: CN215629287U
Application number: CN202121311699.5U
Authority: CN
Inventors: 吴雅明; 鲁凤; 索俊杰; 党春博; 李米哲; 张雪峰; 司卓一; 栗国庆
Original assignee: Zhengzhou Coal Mining Machinery Longwall Equipment Co ltd; Zhengzhou Coal Mining Machinery Group Co Ltd
Current assignee: Zhengzhou Coal Mining Machinery Longwall Equipment Co ltd; Zhengzhou Coal Mining Machinery Group Co Ltd
Priority date: 2021-06-11
Filing date: 2021-06-11
Publication date: 2022-01-25
Anticipated expiration: 2031-06-11

Abstract

The utility model provides a liftable pedestrian bridge, which comprises a bridge frame arranged above a middle groove of a landing section of a reversed loader, wherein two sides of the middle groove of the landing section are respectively provided with a baffle plate, and a linear telescopic driving mechanism for lifting the bridge frame is arranged between the baffle plate and the bridge frame; handrails are respectively rotatably arranged on two sides of the upper end of the bridge frame, and a connecting rod is hinged between each handrail and the corresponding baffle. The bridge comprises a bridge deck and two side plates arranged on two sides of the bridge deck respectively, any one of the baffle and the side plates is provided with a guide groove, and the other one of the baffle and the side plates slides in the guide groove. The utility model has less transverse occupied space in the transportation roadway and improves the roadway passing rate. When the coal mining bridge is not used, the bridge frame can rise to the highest limit position, so that the gap bridge and the groove have enough distance, and coal flows can conveniently pass through the gap bridge and the groove. The utility model has multiple limits and higher safety.

Description

Liftable pedestrian bridge

Technical Field

The utility model belongs to the field of scraper conveying equipment, and particularly relates to a liftable pedestrian bridge.

Background

The scraper elevating conveyor consists of a machine head, a power part, a suspension section middle groove, a convex groove, a hinge groove, a landing section middle groove, an unloading port middle groove, a machine tail, a scraper chain and the like, and is used for transporting coal on the scraper conveyor to a belt conveyor. Because the whole set of equipment of the reversed loader is arranged in a transportation lane, people often need to cross over the tank body for overhauling the equipment, and therefore a set of pedestrian bridge-crossing equipment needs to be arranged on the middle tank of the landing section. The pedestrian bridge in the current market is of a fixed structure and cannot lift, and mainly comprises a step ladder and a bridge, wherein the step ladder and the bridge are connected through a connecting rod, a split pin and a gasket, and are fixed together through a bolt and a middle groove of a landing section after assembly. When in use, a worker can cross the gap bridge to the other side by going up the ladder at one side.

According to the structure of the existing pedestrian bridge, the following defects exist: 1. because the space of the transportation lane is limited, when the step ladder is put down, the step ladder transversely occupies larger space, and the passing rate is reduced; 2. the pedestrian bridge cannot move any more once being installed, and if large coal blocks are encountered, the pedestrian bridge can collide or extrude the bridge, bending and damage can be caused, and coal piling can even occur; 3. the pedestrian bridge-crossing structure is of a pure mechanical structure, the steps on two sides can rotate only by pulling, and the pedestrian bridge-crossing structure is free of a limiting device and is easy to loosen and slide.

SUMMERY OF THE UTILITY MODEL

The utility model provides a liftable pedestrian bridge.

The object of the utility model is achieved in the following way: a liftable pedestrian bridge comprises a bridge frame arranged above a middle groove of a landing section of a reversed loader, wherein two sides of the middle groove of the landing section are respectively provided with a baffle plate, and a linear telescopic driving mechanism for lifting the bridge frame is arranged between the baffle plate and the bridge frame; handrails are respectively rotatably arranged on two sides of the upper end of the bridge frame, and a connecting rod is hinged between each handrail and the corresponding baffle.

The bridge comprises a bridge deck and two side plates arranged on two sides of the bridge deck respectively, any one of the baffle and the side plates is provided with a guide groove, and the other one of the baffle and the side plates slides in the guide groove.

The linear telescopic driving mechanism is hinged between the baffle and the bridge.

The baffle is provided with a guide groove; the side plates of the bridge frame move in the guide grooves; the side plate is provided with a notch for a hydraulic pipeline to pass through; the bridge deck is a rectangular plate, and channel steel is arranged on the bridge deck in the direction perpendicular to the surface of the side plate.

The linear telescopic driving mechanism is a hydraulic jack, and a hydraulic control system for controlling the hydraulic jack is arranged on the baffle.

The utility model has the beneficial effects that: the utility model has less transverse occupied space in the transportation roadway and improves the roadway passing rate. When the coal mining bridge is not used, the bridge frame can rise to the highest limit position, so that the gap bridge and the groove have enough distance, and coal flows can conveniently pass through the gap bridge and the groove. The utility model has multiple limits and higher safety.

Drawings

Fig. 1 is a schematic view of a middle trough of a landing section and a pedestrian bridge.

Fig. 2 is a schematic view of a pedestrian bridge.

Fig. 3 is a perspective view of a pedestrian crossing bridge in use (omitting a hydraulic jack).

Fig. 4 is a perspective view of a pedestrian crossing bridge in a raised state (omitting a hydraulic jack).

Fig. 5 is a schematic view of a baffle.

Fig. 6 is a perspective view of the bridge.

Fig. 7 is a schematic view of an armrest.

The hydraulic control system comprises a connecting rod 1, a baffle 2, a connecting rod connecting hole 21, a hydraulic jack fixing groove 22, an operating valve set fixing plate 23, a cleaning hole 24, a guide groove 25, a one-way lock fixing part 26, a groove-shaped hole 27, a floor section middle groove 3, a handrail 4, a bridge frame 5, a bridge deck 50, a side plate 51, a channel steel 52, a hydraulic jack 6 and a hydraulic control system 7.

Detailed Description

In the present invention, unless otherwise specifically defined and limited, technical terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention pertains. The terms "connected", "fixed", "arranged" and the like are to be understood in a broad sense, and may be fixedly connected, detachably connected or integrated; can be directly connected or indirectly connected through an intermediate medium; either mechanically or electrically. Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features, or indirectly contacting the first and second features through intervening media. Furthermore, a first feature may be "on" or "over" or "above" a second feature, and the like, may be directly on or obliquely above the second feature, or may simply mean that the first feature is at a higher level than the second feature. A first feature "under" or "beneath" a second feature may be directly under or obliquely under the first feature or may simply mean that the first feature is at a lesser level than the second feature. Relational terms such as first, 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. Terms used in the description such as "center", "lateral", "longitudinal", "length", "width", "thickness", "height", "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated.

The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. As shown in fig. 1-7, a liftable pedestrian bridge comprises a bridge frame 5 arranged above a floor section middle groove 3 of a reversed loader, wherein baffles 2 are respectively arranged at two sides of the floor section middle groove 3, and a linear telescopic driving mechanism for lifting the bridge frame 5 is arranged between the baffles 2 and the bridge frame 5; handrails 4 are respectively and rotatably arranged on two sides of the upper end of the bridge frame 5, and a connecting rod 1 is hinged between each handrail 4 and the baffle 2; when the pedestrian crosses the bridge, the handrail 4 rotates to be perpendicular or nearly perpendicular to the upper surface of the bridge frame 5, such as an included angle between 75 and 105 degrees. The pedestrian bridge of the utility model is arranged above the middle groove 3 of the landing section. When a person needs to pass through the linear telescopic driving mechanism, the linear telescopic driving mechanism is shortened, and the bridge 5 descends to a preset position. The handrail 4 is perpendicular or substantially perpendicular to the upper surface of the bridge 5, and can play a role in protection. When the pedestrian bridge crossing is not needed, the linear telescopic driving mechanism extends, the pedestrian bridge crossing is in a rising state, and finally, the handrail 4 rotates until the handrail 4 is basically parallel to the upper surface of the bridge frame 5 and the handrail 4, and an included angle with a certain angle can be formed. The bridge frame 5 of the utility model can realize vertical lifting, and the handrail 4 rotates along with the lifting of the bridge frame 5. The transverse occupied space in the transportation roadway is small, and the roadway passing rate is improved. When the coal mine bridge is not used, the bridge frame 5 can rise to the highest limit position, so that the gap bridge and the groove have enough distance, and coal flows can conveniently pass through the gap bridge and the groove.

The bridge frame 5 comprises a bridge deck 50 and two side plates 51 respectively arranged at two sides of the bridge deck 50, wherein one of the baffle 2 and the side plates 51 is provided with a guide groove 25, and the other one slides in the guide groove 25. The baffle 2 and the side plate 51 form a guide mechanism through the guide groove 25, so that the position of the bridge frame 5 is ensured not to generate large deviation in the ascending and descending processes, and the safety performance is also improved. In the case where the guide groove 25 is provided in the shutter 2, the side plate 51 slides in the guide groove 25 of the shutter 2. In the case where the guide groove 25 is provided in the side plate 51, the shutter 2 slides in the guide groove 25 of the side plate 51.

The linear telescopic driving mechanism is hinged between the baffle 2 and the bridge frame 5. The bridge frame 5 can realize vertical lifting under the action of the guide mechanism; the linear extension drive mechanism should be installed in the same length direction as the lifting direction of the bridge 5. However, due to the influence of installation errors and other factors, in the lifting process of the bridge frame 5, a certain angle error can exist between the linear telescopic driving mechanism and the lifting direction of the bridge frame 5, so that the hinge arrangement can better adapt to the environment and avoid damage.

The baffle 2 is provided with a guide groove 25; the side plates 51 of the bridge 5 move in the guide slots 25; the side plate 51 is provided with a notch for a hydraulic pipeline to pass through; the bridge deck 50 is a rectangular plate, a channel steel 52 is arranged on the bridge deck 50 in the direction perpendicular to the surface of the side plate 51, and a square notch of the channel steel 52 is aligned with a notch in the upper end of the side plate 51. The channel 52 is used for protecting the hydraulic system pipeline.

The linear telescopic driving mechanism is a hydraulic jack 6, and a hydraulic control system 7 for controlling the hydraulic jack 6 is arranged on the baffle 2. The hydraulic control system 7 is prior art and will not be described in detail and may comprise a manually operated valve to manually control the extension or retraction of the hydraulic jack. It can also be made into electromagnetic valve to realize automatic control.

In the specific structure, the connecting rod 1 is in a long strip shape, two ends of the connecting rod are respectively provided with a unthreaded hole, one unthreaded hole is the connecting baffle 2, and the other unthreaded hole is used for connecting the handrail 4. The upper end of the baffle 2 is provided with two connecting rod connecting holes 21 consisting of two ear plates. Four hydraulic jack fixing grooves 22 are formed in the baffle 2; with every two hydraulic jack holding slots 22 being collinear. Each of the hydraulic jack fixing grooves 22 is composed of a plurality of small arc plates which are oppositely arranged, thereby forming an arc-shaped groove. The purpose of the hydraulic jack fixing slots 22 is to place the hydraulic jacks 6. The small arc plate is provided with a threaded hole, and the oil cylinder of the hydraulic jack 6 can be fixed through a screw and a pressing plate. The baffle 2 is provided with a control valve group fixing plate 23 which is a square plate with a plurality of threaded holes and is used for fixing a control valve group of the hydraulic control system 7. The baffle 2 is also provided with a cleaning hole 24, a one-way lock fixing part 26 and a slot-shaped hole 27. The cleaning hole 24 is a rectangular hole and is used for cleaning the blocked coal slime. The guide groove 25 is a notch formed by four plates and is matched with a side plate on the bridge frame 5 to ensure that the bridge frame 5 can move along the vertical direction; the one-way lock fixing part 26 is a strip-shaped plate with a plurality of threaded holes and is used for fixing the one-way lock in the hydraulic control system 7; the slotted hole 27 is an oblong hole and is used for passing through a bolt connecting the baffle 2 and the middle slot 3 of the landing section. The middle groove 3 of the landing section is a component part of the reversed loader and is positioned in the transportation lane. The armrests 4 are provided with ear plates for connecting the armrests and the bridge 5 and ear plates for connecting the armrests 4 and the connecting rods 1. The guard plate of the handrail is a plate with a plurality of long holes. The upper end of the bridge frame 5 is provided with an ear plate for connecting the handrail 4 with the bridge frame 5 and an ear plate for connecting the hydraulic jack with the bridge frame 5. The function of the side plates 51 is to cooperate with the guide slots 25 of the shutters 2 to ensure that the bridge 5 can move in the vertical direction. The notch at the upper end of the side plate 51 is used for penetrating a hydraulic rubber pipe of the hydraulic control system 7.

In the specific implementation: when the crane bridge is installed, the baffle 2 and the middle groove 3 of the landing section are connected together through bolts, the side plates 51 on two sides of the bridge 5 are inserted into the baffle guide groove 25, the bridge 5 is connected with the connecting rod 1 and the hydraulic jack 6 through a pin shaft, and the bridge 5 can be freely lifted and lowered by pulling an operating rod of a hydraulic control valve group in the hydraulic control system 7 to control the hydraulic jack 6 to stretch. When in use, the operating lever is pulled to contract the hydraulic jack 6, so that the bridge frame 5 is lowered to the lowest limit position; after the use, the operating rod is pulled reversely, and the hydraulic jack 6 extends to enable the bridge frame 5 to reach the highest limit position.

The features of the embodiments described above may be arbitrarily combined, and the combination of the features is not contradictory, and should be considered as a range described in the present specification. The technical solution according to the present invention and equivalents or changes thereof, as well as several changes and modifications made therein, should also be considered as the protection scope of the present invention without departing from the overall concept of the present invention.

Claims

1. The utility model provides a liftable pedestrian crosses bridge, is including setting up the crane span structure above falling to the ground section middle part groove of elevating conveyor, its characterized in that: baffles are respectively arranged on two sides of the middle groove of the landing section, and a linear telescopic driving mechanism for lifting the bridge is arranged between the baffles and the bridge; handrails are respectively rotatably arranged on two sides of the upper end of the bridge frame, and a connecting rod is hinged between each handrail and the corresponding baffle.

2. The liftable pedestrian bridge according to claim 1, characterized in that: the bridge comprises a bridge deck and two side plates arranged on two sides of the bridge deck respectively, any one of the baffle and the side plates is provided with a guide groove, and the other one of the baffle and the side plates slides in the guide groove.

3. The liftable pedestrian bridge according to claim 2, characterized in that: the linear telescopic driving mechanism is hinged between the baffle and the bridge.

4. The liftable pedestrian bridge according to claim 2, characterized in that: the baffle is provided with a guide groove; the side plates of the bridge frame move in the guide grooves; the side plate is provided with a notch for a hydraulic pipeline to pass through; the bridge deck is a rectangular plate, and channel steel is arranged on the bridge deck in the direction perpendicular to the surface of the side plate.

5. A liftable pedestrian bridge according to any one of claims 1 to 4, characterized in that: the linear telescopic driving mechanism is a hydraulic jack, and a hydraulic control system for controlling the hydraulic jack is arranged on the baffle.