Low-profile inter-stand dusting device for hydraulic support

Abstract

The present application relates to a kind of low mining high hydraulic support interframe dust device, belong to mine dust protection field.The device includes dust connection mechanism, deformation compensation mechanism and sliding mechanism, wherein, sliding mechanism is arranged on the side guard of roof beam or cover beam along the length direction of roof beam or cover beam of hydraulic support, deformation compensation mechanism includes sleeve connected on the slide rod of sliding mechanism and the plug-in rod that can be inserted into the slot of guide rod, wherein, plug-in rod is fixedly connected with connecting column in slot by internal steel wire rope, in the process of moving frame, steel wire rope can be pulled out from plug-in rod inside under the movement of dust connection mechanism and sliding mechanism, to compensate the deformation of dust connection mechanism in the process of moving frame.The device reduces the influence caused by dust connection groove to narrow internal working space by setting deformation compensation mechanism when moving frame of low mining high hydraulic support, and by deformation compensation mechanism increases movable distance, avoid excessive pulling dust connection groove.

Description

Technical Field

[0001] This invention belongs to the field of mine dust protection and relates to a dust indirect device for hydraulic supports at low mining heights. Background Technology

[0002] Support in the working area of ​​a coal mine is a primary condition for safe and efficient mining. As the core of the fully mechanized mining system, hydraulic supports are mainly used to control the mine pressure in the working area. Currently, hydraulic supports used in China typically consist of a base, top beam, shield beam, hydraulic columns, and a control system. The support of the working area mainly relies on the top beam, shield beam, and hydraulic columns. The lowering and moving of the hydraulic supports is mainly achieved through an electro-hydraulic control system. During fully mechanized mining, the coal mining by the coal mining machine and the lowering and moving of the hydraulic supports are the main sources of coal mine dust. The coal mining machine directly generates a large amount of dust by cutting and crushing the coal seam. During the lowering and moving of the hydraulic supports, the crushed coal dust falls into the working area on the pedestrian side in a short period of time. Small coal chunks and large dust particles settle under gravity, while fine dust is carried by the airflow on the pedestrian side. In particular, respirable dust can remain suspended in the air for a long time, causing serious harm to the health of workers. In addition, the spread of large amounts of dust can reduce visibility in the work area and cause wear and tear on precision instruments, thus affecting their service life.

[0003] The mining height of a coal seam refers to the actual mining height of the coal mining machine. The concept of mining height differs from coal seam thickness. In layered mining of thick coal seams, where there is roof coal collapse or residual floor coal, the coal seam thickness is greater than the mining height; conversely, in thin coal seams, due to roof or floor cutting, the mining height may also be greater than the coal seam thickness. Low mining heights, such as those below 3m, contain more interbedded rock, inevitably generating a large amount of rock dust during mining. Unlike coal seams with other mining heights, low mining height coal seams have narrow mining roadways, and the internal space of the hydraulic supports used is also relatively small.

[0004] Currently, a common method to isolate the large amount of dust generated is to hang dust-collecting nets between hydraulic supports. The nets are attached to the side guards of the hydraulic supports on both sides. During column lowering and support relocation, the first hydraulic support to move pulls the net along the second hydraulic support, sliding the same distance as the first. This method is suitable for hydraulic supports with high mining heights because the internal space is large enough to allow for sufficiently long slide rails to support the net's movement. However, for hydraulic supports with low mining heights, the internal working space is smaller, and this space is further compressed during column lowering and support relocation. If the commonly used dust-collecting net placement method is still used, the net may come into contact with instruments inside the space during movement. Furthermore, due to the limited size of low-mining-height hydraulic supports, the sliding distance of the net is also limited, which may lead to damage to the net or affect the relocation distance. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a dust indirect device for low-extraction hydraulic support frames.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A dust collection device for a low-extraction-height hydraulic support includes a dust collection mechanism, a deformation compensation mechanism, and a sliding mechanism. The sliding mechanism is arranged on the side guard plate of the top beam or shield beam along the length of the hydraulic support. The deformation compensation mechanism includes a sleeve fitted onto the slide rod of the sliding mechanism and a plug rod that can be inserted into a slot on the guide rod of the dust collection mechanism. The plug rod is fixedly connected to the connecting column in the slot by an internal steel wire rope. During the support relocation process, the steel wire rope can be pulled out from inside the plug rod under the action of the movement of the dust collection mechanism and the sliding mechanism, thereby compensating for the deformation of the dust collection mechanism during the support relocation process.

[0007] Furthermore, the dust collection mechanism includes a dust collection trough and guide rods. Each guide rod has a slot at its end along its length. The slot has a wedge-shaped opening, and the wedge-shaped opening faces away from the dust collection trough. A connecting post for connecting to a steel wire rope is provided at the bottom of the slot. A ring-shaped microcontroller is also provided at the bottom of the slot. When the plug rod is pulled against the bottom of the slot by the steel wire rope, and the pressure on the microcontroller exceeds a set threshold, a telescopic locking post electrically connected to the microcontroller extends from the locking post mounting seats on both sides of the slot. The extended telescopic locking post engages the ring-shaped locking protrusion on the outer side of the end of the plug rod between the telescopic locking post and the bottom of the slot.

[0008] Furthermore, during the relocation of the support, the microcontroller receives a signal that the hydraulic support on its side is about to be relocated. The microcontroller controls the telescopic locking pin to immediately retract from the slot back into the locking pin mounting base. The locking protrusion of the plug rod is no longer restricted by the telescopic locking pin, so the plug rod can be smoothly disengaged from the slot.

[0009] Furthermore, the sleeve and the plug rod of the deformation compensation mechanism are vertically connected, and the plug rod is located in the middle of the sleeve; the deformation compensation mechanism has a T-shaped structure as a whole, and the sleeve is fitted on the slide rod of the sliding mechanism.

[0010] Furthermore, the connector rod is hollow inside, and it acts as a protective shell to encapsulate the internal deformable spring, steel wire rope, and return rope guide. The extension direction of the deformable spring is consistent with the length direction of the connector rod. One end of the deformable spring is connected to the bottom of the connector rod and the sleeve, and the other end of the deformable spring is fixed to the steel wire rope. The other end of the steel wire rope passes through the return rope guide and extends out of the end of the connector rod to connect with the connecting post at the bottom of the slot. The return rope guide is located on the inner side of the end of the connector rod away from the sleeve. It is annular in shape and has a smooth curved surface.

[0011] Furthermore, the snap-fit ​​protrusion of the plug rod is located on the outer side away from the end of the sleeve. The snap-fit ​​protrusion is annular in shape and has a smooth curved surface and a flat bottom surface.

[0012] Furthermore, the deformable spring is in an elongated state whether the plug rod is engaged with the slot or disengaged from the guide rod. The difference is that the elongation deformation when disengaged is greater than that when engaged. The wire rope remains connected to the connecting post in the slot whether the plug rod is engaged with the slot or disengaged from the guide rod.

[0013] Furthermore, the sliding mechanism is installed on the side guard plate of the top beam or shield beam through the upper and lower end plates at both ends of the sliding rod, with a gap between the sliding rod and the side guard plate; a spraying mechanism capable of spraying water into the dust collection trough is provided on the upper or lower end plate.

[0014] The beneficial effects of this invention are as follows: This device, by incorporating a deformation compensation mechanism, ensures that the hydraulic support being moved first during the frame relocation process does not excessively strain the dust collection trough. Instead, the deformation compensation mechanism extends a steel wire rope to replace the dust collection mechanism for movement. This means that during the initial frame relocation, the dust collection mechanism remains essentially unchanged and will not tilt or shift during subsequent movements, thus not affecting the internal working space of the low-mining-height hydraulic support. Secondly, the deformation compensation mechanism can slide on the sliding rod of the sliding mechanism and also extend the steel wire rope. Therefore, the moving distance of the dust collection device during frame relocation is the sum of the extendable distance of the steel wire rope and the sliding distance of the sliding rod. Compared to traditional frame relocation methods that rely solely on the sliding distance of the sliding rod, this device better meets the moving distance requirements during frame relocation in low-mining-height environments, preventing excessive strain on the dust collection trough and ensuring its service life.

[0015] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0016] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a simplified schematic diagram of the overall structure of the low-extraction-height hydraulic support dust indirect dust collection device of the present invention; Figure 2 This is a cross-sectional view of the connection between the guide rod and the plug rod of the present invention.

[0017] Reference numerals: 100-Dust collection mechanism; 200-Deformation compensation mechanism; 300-Sliding mechanism; 110-Dust collection groove; 120-Guide rod; 121-Slot; 122-Wedge-shaped opening; 123-Connecting column; 124-Microcontroller; 125-Telescopic locking column; 126-Locking column mounting base; 210-Sleeve; 220-Plug-in rod; 221-Deformation spring; 222-Wire rope; 223-Return rope guide; 224-Locking flange; 310-Upper end plate; 320-Lower end plate; 330-Slide rod. Detailed Implementation

[0018] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0019] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0020] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0021] Please see Figures 1-2 This is a dust collection device for low-extraction hydraulic support frames.

[0022] This invention proposes a dust collection device for low-extraction hydraulic supports, comprising a dust collection mechanism 100, a deformation compensation mechanism 200, and a sliding mechanism 300. The sliding mechanism 300 is arranged along the length of the top beam or shield beam of the hydraulic support on the side guard plate of the top beam or shield beam. The deformation compensation mechanism 200 includes a sleeve 210 sleeved on the slide rod 330 of the sliding mechanism 300 and a plug rod 220 that can be inserted into the slot 121 on the guide rod 120 of the dust collection mechanism 100. The plug rod 220 is fixedly connected to the connecting post 123 in the slot 121 by an internal steel wire rope 222. During the support relocation process, the steel wire rope 222 can be pulled out from the plug rod 220 under the action of the movement of the dust collection mechanism 100 and the sliding mechanism 300, thereby compensating for the deformation of the dust collection mechanism 100 during the support relocation process.

[0023] Furthermore, the dust collection mechanism 100 comprises a dust collection trough 110 and guide rods 120. The dust collection trough 110 is a rigid structural component with a roughly U-shaped cross-section, and the overall direction of the trough is consistent with the length direction of the guide rods 120. A guide rod 120 is connected to each side of the trough of the dust collection trough 110, and the guide rods 120 are fixed to the dust collection trough 110 by welding or threading.

[0024] Furthermore, each guide rod 120 has a slot 121 at its longitudinal end. The slot 121 is generally cylindrical, and the opening of the slot 121 is located on the side away from the dust collection groove 110 and is a wedge-shaped opening 122. This facilitates the insertion rod 220 of the deformation compensation mechanism 200 into the slot 121.

[0025] Furthermore, each guide rod 120 has a connecting post 123 at the bottom of its slot 121 for fixed connection with the steel wire rope 222 of the deformation compensation mechanism 200. The connecting post 123 is welded to the bottom of the slot 121 and is approximately located at the center of the circular bottom of the slot 121. Each guide rod 120 also has a ring-shaped microcontroller 124 at the bottom of its slot 121. When the insertion rod 220 of the deformation compensation mechanism 200 abuts against the bottom of the slot 121 under the traction of the steel wire rope 222, the microcontroller 124 detects the pressure from the insertion rod 220. When the pressure on the microcontroller 124 exceeds a set threshold, the telescopic locking post 125, which is electrically connected to the microcontroller 124, extends from the locking post mounting seats 126 on both sides of the slot 121, with the extension direction being the same as the radial direction of the slot 121. The extended telescopic pin 125 engages the annular snap-fit ​​protrusion 224 on the outer side of the end of the plug rod 220 between the telescopic pin 125 and the bottom of the slot 121, thereby engaging the entire plug rod 220 onto the guide rod 120 to support the entire dust collection mechanism 100 connected between the two hydraulic supports.

[0026] Furthermore, during the relocation of the support, the microcontroller 124 receives a signal that the hydraulic support on its side is about to be relocated. The microcontroller 124 controls the telescopic locking post 125 to immediately retract from the slot 121 back into the locking post mounting base 126. The locking protrusion 224 of the plug rod 220 is no longer restricted by the telescopic locking post 125, so the plug rod 220 can be smoothly disengaged from the slot 121.

[0027] Furthermore, the sleeve 210 and the plug rod 220 of the deformation compensation mechanism 200 are vertically connected, and the plug rod 220 is located in the middle part of the sleeve 210, preferably at the midpoint. The deformation compensation mechanism 200 has a T-shaped structure, and the sleeve 210 is sleeved on the slide rod 330 parallel to the guide rod 120 of the dust collection mechanism 100, and can slide along the slide rod 330. The plug-in rod 220 is hollow inside, and it acts as a protective shell to enclose the internal deformable spring 221, wire rope 222, and return rope guide 223. The extension direction of the deformable spring 221 is consistent with the length direction of the plug-in rod 220. One end of the deformable spring 221 is fixedly connected to the bottom of the plug-in rod 220 where it connects to the sleeve 210, and the other end is fixedly connected to the wire rope 222. The other end of the wire rope 222 passes through the return rope guide 223 and extends out of the end of the plug-in rod 220, where it is fixedly connected to the connecting post 123 at the bottom of the slot 121. The return rope guide 223 is located on the inner side of the end of the plug-in rod 220 away from the sleeve 210. It is annular in shape with a smooth curved surface, reducing the friction between the surface of the return rope guide 223 and the wire rope 222 to prevent the wire rope 222 from jamming during extension and retraction.

[0028] Furthermore, an annular locking flange 224 is provided on the outer side of the end of the connector 220 away from the sleeve 210. The locking flange 224 has a smooth curved surface and a flat bottom surface. The flat bottom surface is perpendicular to the connector 220. Starting from the bottom surface, with the length direction of the connector 220 as a reference, the distance from the point on the curved surface of the locking flange 224 to the central axis of the connector 220 gradually decreases until it is equal to the radial distance of the connector 220. Thus, a smooth annular ring is formed on the outer side of the end of the connector 220 to ensure that the connector 220 can be smoothly inserted into the slot 121 on the guide rod 120. In addition, the flat bottom surface of the locking flange 224 will not slip much when it is engaged by the telescopic locking post 125, ensuring the stability of the connection.

[0029] Furthermore, the deformable spring 221 inside the plug-in rod 220 is in an extended state whether the plug-in rod 220 is engaged with the slot 121 of the guide rod 120 or disengaged from the guide rod 120; the difference is that the extension deformation when disengaged is greater than that when engaged. The elastic coefficient of the deformable spring 221 is large enough to ensure that when a small amount of coal or rocks falls onto the dust collection mechanism 100, the plug-in rod 220 will not disengage from the slot 121 of the guide rod 120 due to the impact of the coal or rocks.

[0030] Furthermore, the steel wire rope 222 inside the plug rod 220 is fixedly connected to the connecting post 123 inside the slot 121, whether the plug rod 220 is engaged with the slot 121 of the guide rod 120 or when the plug rod 220 is disengaged from the guide rod 120.

[0031] Furthermore, the sliding mechanism 300 is mounted on the side guard plate of the top beam or shield beam via the upper end plate 310 and lower end plate 320 at both ends of the slide rod 330, and the mounting method can be a threaded connection. A gap is left between the slide rod 330 and the side guard plate to facilitate the movement of the sleeve 210.

[0032] Furthermore, the upper end plate 310 or the lower end plate 320 is provided with a spraying mechanism that can spray water into the dust collection trough 110 of the dust collection mechanism 100, thereby reducing the dust in the dust collection trough 110, and the sprayed water causes the condensed dust to slide from the dust collection trough 110 to the outside of the hydraulic support.

[0033] Example When using the low mining height hydraulic support frame dust initiation device of the present invention, installation is required first. During installation, simply install the upper end plate 310 and lower end plate 320 of the sliding mechanism 300 onto the side guard plate of the top beam or shield beam along the length direction of the top beam or shield beam. It should be noted that during installation, it is necessary to ensure that the sliding rod 330 of the sliding mechanism 300 is parallel to the length direction of the side guard plate.

[0034] During the frame shifting process, the hydraulic support that moves first drives the entire sliding mechanism 300 to move. The sleeve 210 moves relative to the slide rod 330 and abuts against the upper end plate 310 or the lower end plate 320. Then, the entire sliding mechanism 300 applies a pulling force to the sleeve 210, causing the insertion rod 220 of the deformation compensation mechanism 200 to tend to disengage from the slot 121 of the guide rod 120. At this time, the microcontroller 124 at the bottom of the slot 121 receives a signal that the hydraulic support that shifted first is about to move. The microcontroller 124 controls the telescopic locking post 125 to retract, the insertion rod 220 disengages from the slot 121, and the deformation spring 221 is stretched again until the hydraulic support that shifted first... The support reaches the target position for the frame movement; then the hydraulic support that moves later drives the entire dust collection mechanism 100 to move, the distance between the hydraulic supports decreases, the tension applied to the plug rod 220 by the hydraulic support that moves first decreases, and under the action of the rebound tension of the deformation spring 221, the plug rod 220 is inserted into the slot 121 of the guide rod 120 again along the wire rope 222, and when the frame movement is completely completed, the plug rod 220 is only subjected to the tension of the deformation spring 221, so pressure is applied to the microcontroller 124 at the bottom of the slot 121. The microcontroller 124 detects the pressure, and the telescopic locking pin 125 extends out from the locking pin mounting seat 126 to lock the plug rod 220.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A dust collection device between low-extraction hydraulic support frames, characterized in that: It includes a dust collection mechanism (100), a deformation compensation mechanism (200), and a sliding mechanism (300). The sliding mechanism (300) is arranged on the side guard plate of the top beam or shield beam along the length direction of the top beam or shield beam of the hydraulic support. The deformation compensation mechanism (200) includes a sleeve (210) sleeved on the slide rod (330) of the sliding mechanism (300) and a plug rod (220) that can be inserted into the slot (121) on the guide rod (120) of the dust collection mechanism (100). The plug rod (220) is fixedly connected to the connecting post (123) in the slot (121) by an internal steel wire rope (222). During the frame relocation process, the steel wire rope (222) can be pulled out from the inside of the plug rod (220) under the action of the movement of the dust collection mechanism (100) and the sliding mechanism (300), thereby compensating for the deformation of the dust collection mechanism (100) during the frame relocation process. The dust collection mechanism (100) includes a dust collection groove (110) and guide rods (120). Each guide rod (120) has a slot (121) at its longitudinal end. The slot (121) has a wedge-shaped opening (122) facing away from the dust collection groove (110). A connecting post (123) for connecting to the wire rope (222) is provided at the bottom of the slot (121). A ring-shaped microcontroller (124) capable of detecting pressure is also provided at the bottom of the slot (121). When the plug rod (220) abuts against the bottom of the slot (121) under the traction of the wire rope (222) and the pressure on the microcontroller (124) exceeds the set threshold, the telescopic locking pin (125) electrically connected to the microcontroller (124) extends out from the locking pin mounting seats (126) on both sides of the slot (121). The extended telescopic locking pin (125) engages the annular locking protrusion (224) on the outer side of the end of the plug rod (220) between the telescopic locking pin (125) and the bottom of the slot (121).

2. The dust collection device between low-extraction hydraulic support frames according to claim 1, characterized in that: When the frame is moved, the microcontroller (124) receives a signal that the hydraulic support on its side is about to be moved, and the microcontroller (124) controls the telescopic pin (125) to immediately retract from the slot (121) back into the pin mounting base (126).

3. The dust collection device between low-mining-height hydraulic support frames according to claim 2, characterized in that: The sleeve (210) and the plug rod (220) of the deformation compensation mechanism (200) are vertically connected, and the plug rod (220) is located in the middle part of the sleeve (210); the deformation compensation mechanism (200) has a T-shaped structure, and the sleeve (210) is sleeved on the slide rod (330) of the sliding mechanism (300).

4. A dust collection device between low-extraction hydraulic support frames according to claim 3, characterized in that: The plug rod (220) is hollow inside and serves as a protective shell to encapsulate the internal deformable spring (221), steel wire rope (222), and return rope guide (223). The extension direction of the deformable spring (221) is consistent with the length direction of the plug rod (220). One end of the deformable spring (221) is connected to the bottom of the plug rod (220) connected to the sleeve (210), and the other end of the deformable spring (221) is fixed to the steel wire rope (222). The other end of the steel wire rope (222) passes through the return rope guide (223) and extends out of the end of the plug rod (220) to connect with the connecting post (123) at the bottom of the slot (121). The return rope guide (223) is located on the inner side of the end of the plug rod (220) away from the sleeve (210). It is annular in shape and has a smooth curved surface.

5. A dust collection device between low-extraction hydraulic support frames according to claim 4, characterized in that: The snap-fit ​​protrusion (224) of the plug rod (220) is located on the outer side away from the end of the sleeve (210). The snap-fit ​​protrusion (224) is annular in shape and has a smooth curved surface and a flat bottom surface.

6. A dust collection device between low-extraction hydraulic support frames according to claim 5, characterized in that: The deformable spring (221) is in an extended state whether the plug rod (220) is engaged with the slot (121) or disengaged from the guide rod (120). The difference is that the extension deformation when disengaged is greater than that when engaged. The wire rope (222) remains connected to the connecting post (123) in the slot (121) whether the plug rod (220) is engaged with the slot (121) or disengaged from the guide rod (120).

7. A dust collection device between hydraulic supports for low mining heights according to claim 6, characterized in that: The sliding mechanism (300) is mounted on the side guard plate of the top beam or the shield beam through the upper end plate (310) and the lower end plate (320) at both ends of the slide rod (330), and a gap is left between the slide rod (330) and the side guard plate; the upper end plate (310) or the lower end plate (320) is provided with a spraying mechanism that can spray water into the dust collection trough (110).

Images