A hydraulic support inter-stand dust separation device

Abstract

The present application relates to a kind of hydraulic support interchamber dust barrier device, belong to underground dust protection field.The device includes: installation part, roof, lifting part and controller;Lifting part and controller are set to inside installation part, installation part is installed in the top beam both sides of hydraulic support, roof is installed on the top beam upper surface of hydraulic support and is connected with lifting part;Controller is connected with the control system between hydraulic and can obtain the posture information of hydraulic support in lowering column process, controller controls lifting part to lift according to the posture information of hydraulic support in lowering column process, so that the height difference between roof and the top surface of adjacent hydraulic support is within the expected range in lowering column process.The device can always ensure that the height of roof is not lower than the bottom height of installation part during lowering column process, so that there is no gap between adjacent interchamber dust barrier device due to height difference, to avoid coal or dust from gap into the inside of hydraulic.

Description

Technical Field

[0001] This invention belongs to the field of underground dust protection and relates to a dust barrier device between hydraulic support frames. Background Technology

[0002] Coal is my country's basic energy source and industrial raw material, providing a strong guarantee for economic and social development and the stable supply of national energy security for a long time. In recent years, with the development of science and technology, the coal mining industry in my country has developed rapidly. However, this has also created certain safety hazards and seriously affected the normal production of coal mines. Current research shows that coal dust not only threatens the safe production of mines but also seriously endangers the physical and mental health of coal miners.

[0003] During fully mechanized mining, the coal mining machine's cutting and the hydraulic support's lowering and moving 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 support, the crushed coal dust falls in large quantities into the pedestrian-side working area within a short period. Small coal chunks and large dust particles settle under gravity, while fine dust is carried by airflow in the pedestrian-side area. In particular, respirable dust can remain suspended in the air for extended periods, causing serious harm to workers' health. Furthermore, the diffusion of large amounts of dust reduces visibility in the working area and causes wear and tear on precision instruments, thus affecting their service life.

[0004] Typically, side guards are installed on the top beam to prevent dust from falling into the hydraulic support during column lowering and frame relocation. However, to avoid affecting the internal working space of the hydraulic support, the height of the side guards is limited; the height of the side guards may be less than the height of the lowering column. This results in gaps in the height direction between the side guards of adjacent hydraulic supports during column lowering and frame relocation, allowing large amounts of coal or dust to enter the hydraulic support through these gaps. A common method to address the problem of coal and dust falling between hydraulic supports is to hang dust-collecting nets. However, this only protects the sloping rear half, as coal can slide down the net due to gravity. The top does not have this characteristic, so this method is unsuitable. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a dust barrier device between hydraulic support frames.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A dust-blocking device between hydraulic supports includes: an installation part for installing the dust-blocking device on the top beam of the hydraulic support; a top plate for preventing coal or dust from falling into the hydraulic support during the lowering of the hydraulic support; a lifting part for raising or lowering the top plate; and a controller for controlling the raising or lowering of the lifting part. The lifting part and the controller are disposed inside the installation part. The installation part is installed on both sides of the top beam of the hydraulic support, and the top plate is installed on the upper surface of the top beam of the hydraulic support and connected to the lifting part. The controller is connected to the control system of the hydraulic system and can acquire the attitude information of the hydraulic support during the lowering process. The controller controls the lifting part to raise and lower based on the attitude information of the hydraulic support during the lowering process, so that the height difference between the top plate and the top surface of the adjacent hydraulic support is within a expected range during the lowering process. The expected range means that the height of the top plate is always not lower than the bottom height of the installation part during the lowering process, so that there will be no gap between the adjacent dust-blocking devices due to the height difference, and coal or dust will be prevented from entering the hydraulic support through the gap.

[0007] Furthermore, the attitude information acquired by the controller during the column lowering process includes the column lowering time, column lowering rate, and final column lowering height. The controller has a descent threshold. When the controller calculates that the actual column lowering height reaches the descent threshold based on the column lowering time and rate, the controller controls the lifting unit to extend at the same rate to keep the top surface at the height of the descent threshold.

[0008] Furthermore, the controller can verify the final lowering height when the column lowering begins. If the final lowering height is greater than the sum of the height of the mounting part and the range of the lifting part, it will send feedback to the control system of the hydraulic support that the final lowering height needs to be adjusted; if the final lowering height is less than the sum of the height of the mounting part and the range of the lifting part, the column lowering will begin.

[0009] Furthermore, at least four lifting units are configured, with two units installed in pairs within the mounting sections on the left and right sides of the hydraulic support top beam. Within each mounting section, two lifting units are located at the front and rear ends, respectively. Each of the four lifting units is equipped with one or more control valves, and the four lifting units move synchronously. Overall, the four lifting units are located at the four corners of the entire device to support the rectangular top plate connected to the lifting units during extension, ensuring balanced force distribution on the top plate.

[0010] Furthermore, the lifting unit is configured as a hydraulic telescopic column, which includes a hydraulic cylinder and a hydraulic rod, both of which are cylindrical in shape; one end of the hydraulic rod is placed inside the hydraulic cylinder, and the other end of the hydraulic rod is connected to the bottom surface of the top plate; the end of the hydraulic cylinder away from the hydraulic rod is fixedly connected to the inner bottom surface of the mounting part.

[0011] Furthermore, the mounting section includes a cavity for accommodating the lifting unit and the controller, and an edge for mounting. The edge is fixedly connected to the cavity, located on the upper surface of the cavity, and protrudes towards the side of the hydraulic support top beam. Thus, when the cavity is against the side of the top beam, the edge simultaneously mounts a portion of the upper surface of the top beam. A telescopic air-blowing pipe is provided at the bottom of the cavity. During the column lowering and frame movement process, air is blown from the telescopic air-blowing pipe of the hydraulic support adjacent to the lowering hydraulic support. Since adjacent hydraulic supports are not completely flush, gaps are required for column lowering and frame movement. Similarly, the hydraulic supports equipped with the inter-frame dust barrier device of this invention also require small gaps between adjacent inter-frame dust barrier devices. By providing telescopic air-blowing pipes to blow air upwards into these gaps, small particles and dust falling into the gaps are prevented from entering the hydraulic support. During the process of lowering and moving the support column, the telescopic air blowing pipe of the hydraulic support adjacent to the hydraulic support being lowered extends and blows air. This ensures that the gap between the dust blocking devices between adjacent supports is always only the bottom air inlet and the top air outlet, improving the working efficiency of the telescopic air blowing pipe.

[0012] Furthermore, the mounting part is bolted to the top beam of the hydraulic support along the edge, and several ear pads are provided on the four sides of the cavity, through which the mounting part is further installed and fixed to the top beam.

[0013] Furthermore, when the mounting part is fitted along the edge to the upper surface of the hydraulic support top beam, the edges on both sides form a concave surface on the upper surface of the top beam.

[0014] Furthermore, the lower surface of the roof has a downwardly protruding convex surface, which is embedded in the concave surface formed along the edge when the lifting unit is fully retracted. The thickness of the convex surface is the same as the thickness of the edge. When the lifting unit is fully retracted, the convex surface is precisely embedded in the concave surfaces formed along the left and right sides of the upper surface of the roof beam by the mounting part. This allows the roof to evenly transfer the load-bearing force to the bottom roof beam when supporting the coal seam at the top, avoiding deformation due to supporting the coal seam and extending the service life of the roof.

[0015] Furthermore, the area of ​​the top plate is larger than the surface area of ​​the top surface of the hydraulic support, and the upper surface of the top plate is flat, as is the surface of the convex side.

[0016] The beneficial effects of this invention are as follows: The dust-blocking device between the supports of the present invention covers the upper surface of the top beam of the hydraulic support and the side guard plate of the top beam. Under the control of the controller, the lifting unit can adjust the distance between the top plate and the upper surface of the top beam. Thus, when the hydraulic support is lowering and moving, the controller obtains the posture information of the hydraulic support during the lowering and moving process and controls the top plate to rise synchronously or semi-synchronously, so that the lowering height of the top plate is always kept within the height of the side guard plate of the adjacent hydraulic support. This eliminates the gap that may occur between adjacent hydraulic supports during the traditional lowering and moving process and prevents coal or dust from falling into the hydraulic support.

[0017] 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

[0018] 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 overall schematic diagram of the inter-rack dust barrier device of the present invention; Figure 2 This is a cross-sectional view of the dust barrier device between shelves of the present invention in its retracted state; Figure 3 This is a cross-sectional view of the inter-rack dust barrier device of the present invention in its extended state; Figure 4 This is a schematic diagram of the installation structure of the inter-rack dust barrier device and hydraulic support of the present invention; Figure 5 This is a cross-sectional view of the column lowering process of the dust barrier device between adjacent shelves according to the present invention.

[0019] Reference numerals: 100-installation part; 200-lifting part; 300-top plate; 400-controller; 500-hydraulic support; 101-cavity; 102-edge; 103-telescopic air blowing pipe; 201-hydraulic cylinder; 202-hydraulic rod; 301-convex surface; 501-top beam; 502-side guard plate. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] 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.

[0023] Please see Figures 1-5 This is a dust barrier device between hydraulic support frames.

[0024] like Figure 1 As shown, the inter-rack dust barrier device of the present invention includes a top plate 300, a mounting part 100, a lifting part 200, and a controller 400. The mounting parts 100, which are arranged in pairs, fix the entire inter-rack dust barrier device to the top of the hydraulic support by mounting the side guard plates 502 of the left and right top beams 501 of the hydraulic support. The top plate 300 is located on the surface of the top beam 501 of the hydraulic support and is fixedly connected to a plurality of lifting parts 200 in the mounting parts 100 on both sides. Under the drive of the lifting parts 200, the top plate 300 can move away from or closer to the surface of the top beam 501.

[0025] Specifically, the dust-blocking device between the supports of the present invention covers the upper surface of the top beam 501 of the hydraulic support and the side guard plate 502 of the top beam 501. Under the control of the controller 400, the lifting part 200 can adjust the distance between the top plate 300 and the upper surface of the top beam 501. Thus, when the hydraulic support is lowering and moving, the controller 400 obtains the posture information of the hydraulic support during the lowering and moving process and controls the top plate 300 to rise synchronously or semi-synchronously, so that the lowering height of the top plate 300 is always kept within the height of the side guard plate 502 of the adjacent hydraulic support, thereby eliminating the gap that may occur between adjacent hydraulic supports during the traditional lowering and moving process and preventing coal or dust from falling into the hydraulic support.

[0026] Preferably, the attitude information of the hydraulic support acquired by the controller 400 includes the column lowering time, column lowering rate, and final column lowering height.

[0027] Preferably, the controller 400 has a descent threshold. The controller 400 only controls the lifting unit 200 to rise at the same rate when the actual descent height reaches the threshold, based on the descent time and rate. That is, the lifting unit 200 only begins to rise after the top plate 300 of the inter-support dust barrier has descended to a certain height. This design aims to allow the top plate 300 to detach from the top coal seam, eliminating friction between the surface of the top plate 300 and the top coal seam, facilitating the movement of the hydraulic supports. Furthermore, the descent threshold maximizes the contact distance between the dust barriers of adjacent hydraulic supports in the height direction, further reducing the possibility of coal and dust entering between the hydraulic supports.

[0028] For more advanced downhole hydraulic supports, a PLC (Programmable Logic Controller 400) is typically used in the centralized control system. In the entire system, the PLC control cabinet sends predetermined control signals to the input mechanism. The input mechanism converts and amplifies the received control signals into mechanical signals. Subsequently, the transmission mechanism converts and amplifies the mechanical signals, and through this transmission mechanism, it controls the main control valve of the actuator. The hydraulic support then completes its task according to the predetermined control signals and program settings. The entire system typically uses wired transmission to ensure signal stability, such as an RS485 bus. The transmission mechanism actually refers to the hydraulic extension column of the hydraulic support, also known as a jack, and the main control valve controls the extension and retraction of the hydraulic extension column.

[0029] Based on the above, the controller 400 of the inter-frame dust barrier device of the present invention can be connected to the PLC in the control system of a single hydraulic support via a wired connection to obtain the attitude information of the hydraulic support during column lowering and frame movement.

[0030] Preferably, the controller 400 transmits a control signal to the control valve of the lifting unit 200 based on the set descent threshold and the acquired descent time and actual descent height of the hydraulic support during the descent and relocation process. The controller 400 verifies the final descent height of the hydraulic support. The height of the installation unit 100 is set to h, the range of the lifting unit 200 to s, and the final descent height to H. If H is greater than h + s, it indicates that the final descent height will result in a gap between adjacent dust-blocking devices. The controller 400 then sends feedback to the control system of the hydraulic support, requesting adjustment of the final descent height.

[0031] Preferably, such as Figure 2 and Figure 3 As shown, the controller 400 and the lifting unit 200 are installed in the mounting part 100 of the inter-frame dust barrier device. At least four lifting units 200 are configured, with two of them installed in the mounting parts 100 on the left and right sides of the hydraulic support top beam 501 respectively. Furthermore, the two lifting units 200 inside each mounting part 100 are located at the front and rear ends inside the mounting part 100 respectively. That is, in general, the four lifting units 200 are located at the four corners of the entire device to support the rectangular top plate 300 connected to the lifting unit 200 when it is extended, so as to ensure that the top plate 300 is subjected to balanced force.

[0032] Preferably, the lifting unit 200 can be configured as a hydraulic telescopic column, which includes a hydraulic cylinder 201 and a hydraulic rod 202. Both the hydraulic cylinder 201 and the hydraulic rod 202 are cylindrical. One end of the hydraulic rod 202 is placed inside the hydraulic cylinder 201, and the other end is fixedly connected to the bottom surface of the top plate 300. The end of the hydraulic cylinder 201 away from the hydraulic rod 202 is fixedly connected to the inner bottom surface of the mounting part 100, so that the entire inter-frame dust barrier device presents an inverted concave cover, such as... Figure 4 As shown, during the actual installation process, the cover of the dust barrier between the frames is located on the upper surface and side of the top beam 501 of the hydraulic support.

[0033] Preferably, the four lifting parts 200 can be equipped with one or more control valves. The four lifting parts 200 need to maintain synchronous movement to prevent the top plate 300 from tilting. The control valve is also located inside the mounting part 100 and is connected to the controller 400.

[0034] Preferably, such as Figure 5As shown, the mounting part 100 includes a cavity 101 for accommodating the lifting part 200 and the controller 400, and an edge 102 for mounting. The edge 102 is fixedly connected to the cavity 101. The edge 102 is located on the upper surface of the cavity 101 and protrudes towards the side of the hydraulic support top beam 501. Thus, when the cavity 101 is against the side of the top beam 501, the edge 102 is also simultaneously mounted on part of the upper surface of the top beam 501, and then fixed by bolts. Furthermore, a telescopic air blowing pipe 103 is provided at the bottom of the cavity 101. Since adjacent hydraulic supports are not completely fitted together, gaps need to be left to facilitate column lowering and support movement. Similarly, the hydraulic supports equipped with the inter-support dust barrier device of this invention also need to have small gaps between adjacent inter-support dust barrier devices. By providing the telescopic air blowing pipe 103, air is blown upwards into the gaps between adjacent inter-support dust barrier devices, thereby preventing small particles and dust falling into the gaps from entering the interior of the hydraulic support. Figure 5 As shown, during the process of lowering the column and moving the support, the telescopic air blowing pipe 103 of the hydraulic support adjacent to the hydraulic support being lowered extends and blows air. This ensures that the gap formed between the dust blocking devices between adjacent supports is always only the bottom air inlet and the top air outlet, thus improving the working efficiency of the telescopic air blowing pipe 103.

[0035] Preferably, the four sides of the cavity 101 of the mounting part 100 are also provided with a number of ear pads (not shown in the figure), and the mounting part 100 is further fitted and installed with the top beam 501 through the ear pads to ensure the stability of the mounting part 100.

[0036] Preferably, such as Figure 5 As shown, the area of ​​the top plate 300 is slightly larger than the surface area of ​​the top surface of the hydraulic support. The upper surface of the top plate 300 is flat, and the lower surface of the top plate 300 has a downwardly protruding convex surface 301, the surface of which is also flat. When the lifting part 200 is fully retracted, the convex surface 301 fits precisely into the concave surface formed by the mounting part 100 on the left and right sides of the upper surface of the top beam 501, so that when the top plate 300 supports the top coal seam, the load is evenly transferred to the bottom top beam 501, avoiding deformation due to supporting the coal seam and extending the service life of the top plate 300. The thickness of the convex surface 301 on the top surface is the same as the thickness of the edge 102 of the mounting part 100.

[0037] Preferably, in the assembly process of the inter-rack dust barrier device of the present invention, when calculating the center distance between adjacent hydraulic supports, the width of the top plate 300 needs to be taken into account, and then it can be installed in a conventional manner. During the installation process, the mounting part 100 of the inter-rack dust barrier device of the present invention and its internal controller 400 and lifting part 200 can be installed on the side of the top beam 501 first. After adjusting the support position and posture of the hydraulic supports, the top plate 300 and the lifting part 200 can be connected and installed last.

[0038] Preferably, for the inclined shield beam section, a conventional dust collection net can be used. Due to the inclination, coal chunks falling into the dust collection net will slide off to the outside of the hydraulic support under gravity. Specifically, one end of the conventional dust collection net is connected to the bottom of the mounting part 100, and the other end is connected to the bottom of the shield beam to achieve dust prevention for the shield beam section.

[0039] The specific working process of the hydraulic support dust barrier device of the present invention is as follows: The controller 400 obtains the column lowering time, lowering rate, and final lowering height of the hydraulic support 500 from the control system PLC of the hydraulic support 500; it verifies whether the final lowering height is qualified. If it is not qualified, it requests adjustment of the final lowering height; if it is qualified, it continues. After the hydraulic support 500 begins to lower the column, the controller 400 calculates the actual lowering height based on the lowering time and lowering rate. When the actual lowering height reaches the lowering threshold, the controller 400 controls the lifting unit 200 to raise the column at the same rate, ensuring that the top plate 300 is as close as possible to the height of the lowering threshold. At the start of column lowering, adjacent supports... The telescopic air blowing pipe 103 in the mounting part 100 near the lowering dust barrier device extends out and begins to blow air into the gap between adjacent dust barrier devices; after the column is lowered, the frame is moved, and after the frame is moved, the column is raised. During this process, the controller 400 also controls the retraction rate of the lifting part 200 according to the column raising rate, keeping the column raising rate and retraction rate synchronized until the lifting part 200 is fully retracted. At this time, the top plate 300 is completely attached to the upper surface of the top beam 501; finally, the top beam 501 supports the entire inter-frame dust barrier device to support the top coal seam, completing the entire column lowering and frame moving process.

[0040] The dust-blocking device between the supports of the present invention covers the upper surface of the top beam 501 of the hydraulic support 500 and the side guard plate 502 of the top beam 501. Under the control of the controller 400, the lifting part 200 can adjust the distance between the top plate 300 and the upper surface of the top beam 501. Thus, when the hydraulic support 500 is lowering and moving, the controller 400 obtains the posture information of the hydraulic support 500 during the lowering and moving process and controls the top plate 300 to rise synchronously or semi-synchronously, so that the lowering height of the top plate 300 is always kept within the height of the side guard plate 502 of the adjacent hydraulic support. This eliminates the gaps that may occur between adjacent hydraulic supports 500 during the traditional lowering and moving process and prevents coal or dust from falling into the hydraulic support 500.

[0041] 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-blocking device between hydraulic support frames, characterized in that: It includes: The mounting part (100) is used to install the inter-frame dust barrier device at the top beam (501) of the hydraulic support (500); The top plate (300) is used to prevent coal or dust from falling into the hydraulic support (500) during the lowering process of the hydraulic support (500); Lifting unit (200) is used to raise or lower the top plate (300). A controller (400) is used to control the lifting unit (200) to raise or lower; The lifting part (200) and the controller (400) are disposed inside the mounting part (100). The mounting part (100) is installed on both sides of the top beam (501) of the hydraulic support (500). The top plate (300) is installed on the upper surface of the top beam (501) of the hydraulic support (500) and connected to the lifting part (200). The controller (400) is connected to the hydraulic control system and can obtain the attitude information of the hydraulic support (500) during the column lowering process. The controller (400) controls the lifting part (200) to lift and lower according to the attitude information of the hydraulic support (500) during the column lowering process, so that the height difference between the top plate (300) and the top surface of the adjacent hydraulic support (500) is within the expected range during the column lowering process.

2. The hydraulic support frame dust barrier device according to claim 1, characterized in that: The attitude information acquired by the controller (400) during the column lowering process includes column lowering time, column lowering rate and final column lowering height. The controller (400) has a descent threshold. When the controller (400) calculates the actual column lowering height based on the column lowering time and column lowering rate and the descent threshold is reached, the controller (400) controls the lifting part (200) to extend at the same rate to keep the top surface at the height of the descent threshold.

3. The hydraulic support frame dust barrier device according to claim 2, characterized in that: The controller (400) can verify the final lowering height when the column lowering begins. If the final lowering height is greater than the sum of the height of the mounting part (100) and the range of the lifting part (200), it will send feedback to the control system of the hydraulic support (500) that the final lowering height needs to be adjusted. If the final lowering height is less than the sum of the height of the mounting part (100) and the range of the lifting part (200), the column lowering will begin.

4. The dust barrier device between hydraulic support frames according to claim 1, characterized in that: At least four lifting units (200) are configured, with two units installed in pairs in the mounting parts (100) on the left and right sides of the top beam (501), and the two lifting units (200) inside each mounting part (100) are located at the front and rear ends inside the mounting part (100); the four lifting units (200) are configured with one or more control valves, and the four lifting units (200) move synchronously.

5. The hydraulic support frame dust barrier device according to claim 4, characterized in that: The lifting unit (200) is configured as a hydraulic telescopic column, which includes a hydraulic cylinder (201) and a hydraulic rod (202). Both the hydraulic cylinder (201) and the hydraulic rod (202) are cylindrical. One end of the hydraulic rod (202) is placed inside the hydraulic cylinder (201), and the other end of the hydraulic rod (202) is connected to the bottom surface of the top plate (300). The end of the hydraulic cylinder (201) away from the hydraulic rod (202) is fixedly connected to the inner bottom surface of the mounting part (100).

6. The hydraulic support frame dust barrier device according to claim 1, characterized in that: The mounting part (100) includes a cavity (101) for accommodating the lifting part (200) and the controller (400), and an edge (102) for mounting. The edge (102) is fixedly connected to the cavity (101). The edge (102) is located on the upper surface of the cavity (101) and protrudes from the cavity (101) to the side of the top beam (501). Thus, when the cavity (101) is against the side of the top beam (501), the edge (102) is also simultaneously mounted on part of the upper surface of the top beam (501). A telescopic air blowing pipe (103) is provided at the bottom of the cavity (101). During the process of lowering the column and moving the frame, the telescopic air blowing pipe (103) of the hydraulic support adjacent to the hydraulic support (500) that is being lowered extends out and blows air.

7. The hydraulic support frame dust barrier device according to claim 6, characterized in that: The mounting part (100) is bolted to the top beam (501) via the edge (102), and the four sides of the cavity (101) are provided with a number of ear pads, and the mounting part (100) is further installed and fixed to the top beam (501) via the ear pads.

8. The hydraulic support frame dust barrier device according to claim 6, characterized in that: When the edge (102) of the mounting part (100) is attached to the upper surface of the top beam (501), the edge (102) on both sides forms a concave surface on the upper surface of the top beam (501).

9. The hydraulic support frame dust barrier device according to claim 8, characterized in that: The lower surface of the top plate (300) has a downwardly protruding convex surface (301), which is embedded in the concave surface formed by the edge (102) when the lifting part (200) is fully retracted, and the thickness of the convex surface (301) is the same as the thickness of the edge (102).

10. The hydraulic support frame dust barrier device according to claim 9, characterized in that: The area of ​​the top plate (300) is greater than the surface area of ​​the top surface of the hydraulic support (500), the upper surface of the top plate (300) is flat, and the surface of the convex surface (301) is flat.

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