Novel telescopic mechanism of hydraulic support

Abstract

The invention relates to a novel telescopic mechanism of a hydraulic support. The novel telescopic mechanism comprises a fixed beam, a movable beam, a first driver, a second driver, a plurality of guide rods and a cleaning mechanism. One side of the fixed beam is hinged to a top beam of the hydraulic support, and the two ends of the first driver are arranged on the top beam and the fixed beam so as to drive the fixed beam to rotate to a standby position or a supporting position in a vertical plane; one ends of the plurality of guide rods are fixed in the movable beam, and the movable beam is slidably sleeved on the fixed beam through the plurality of guide rods; the second driver is arranged in the fixed beam and connected with the movable beam so as to drive the movable beam to slide along the fixed beam, and then the supporting face of the top beam of the hydraulic support to the thin coal seam top plate is enlarged. The thin coal seam cleaning device has the beneficial effects that the thin coal seam cleaning device is not only suitable for thin coal seams, but also more reasonable and simpler in design, and the manufacturing cost and the maintenance difficulty are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of mining, and particularly to a novel telescopic mechanism for a hydraulic support. Background Art

[0002] In the field of coal mining, the length of the top beam of a traditional coal mine hydraulic support is adjusted by hydraulic drive between a fixed beam and a moving beam to cope with complex geological conditions such as coal seam thickness changes, roof undulations, and faults. To a certain extent, it alleviates the problems of empty roof or insufficient support caused by uneven roofs. However, there are significant defects between the fixed beam and the moving beam. On the one hand, since it has to bear high loads and frequent movements, high-strength alloy steel needs to be used and precision machining processes are adopted, which makes the material cost high and the manufacturing process complex. On the other hand, the complex structure of its multiple moving parts makes it difficult to replace underground. Once a failure occurs, it will seriously affect the mining progress. Moreover, the telescopic beam is built inside the top beam. As it extends and retracts multiple times, coal gangue easily enters it, resulting in difficult recovery and interfering with the normal operation of the shearer.

[0003] The mining environment of thin coal seams is very different from that of coal mines. The rock strata in the working face of a thin coal seam well are usually thin, and the roof is composed of broken rock strata such as gypsum and rock. Although the pressure is small, the flatness is high. In view of these characteristics, the hydraulic support in a thin coal seam well needs to be lightweight to adapt to the thinner rock strata and prevent additional pressure on the roof caused by the overweight of the support, which will aggravate the degree of roof fragmentation. At the same time, its telescopic device must be able to closely fit the roof to ensure effective support for the broken roof and maintain the stability of the mining space. However, the traditional hydraulic supports at the present stage cannot meet the needs of the working face of a thin coal seam well. Therefore, a novel telescopic mechanism for a hydraulic support is urgently needed. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] [[ID=X]]In view of the above-mentioned disadvantages and deficiencies of the prior art, the present invention provides a novel telescopic mechanism for a hydraulic support, which solves the technical problem that the prior art cannot be applied to thin coal seams.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the main technical solutions adopted by the present invention include:

[0008] It should be noted that there seems to be an error in the original text where the line number "ID=X" is used in the translation of "In view of the above-mentioned disadvantages and deficiencies of the prior art, the present invention provides a novel telescopic mechanism for a hydraulic support, which solves the technical problem that the prior art cannot be applied to thin coal seams." This should be "ID=19" as per the original text. The above translation is adjusted accordingly.The present invention provides a novel telescopic mechanism for a hydraulic support, which includes a fixed beam, a moving beam, a first driver, a second driver, a plurality of guide rods, and a cleaning mechanism; one side of the fixed beam is hinged to the top beam of the hydraulic support, and both ends of the first driver are arranged on the top beam and the fixed beam to drive the fixed beam to rotate to a standby position or a support position in a vertical plane; one ends of the plurality of guide rods are fixed inside the moving beam, and the moving beam is slidably sleeved on the fixed beam through the plurality of guide rods; the second driver is arranged inside the fixed beam, and the second driver is connected to the moving beam to drive the moving beam to slide along the fixed beam, thereby increasing the support surface of the top beam of the hydraulic support for the roof of the thin coal seam; an installation cavity capable of accommodating the cleaning mechanism is arranged inside the moving beam, and the cleaning mechanism is arranged inside the installation cavity; during cleaning, the cleaning mechanism extends out of the installation cavity to clean the thin coal seam particles falling on the top surface of the fixed plate.

[0009] Optionally, the cleaning mechanism includes a third driver, a telescopic arm, and a scraper; the third driver is fixed in the installation cavity, the telescopic arm is installed at the driving end of the third driver, and the scraper is arranged at the free end of the telescopic arm; during cleaning, the third driver can drive the telescopic arm to move out of the installation cavity and be located on one side of the fixed plate, and drive the scraper to clean the thin coal seam particles on the top surface of the fixed plate by stretching the telescopic arm.

[0010] Optionally, the telescopic arm includes a support, a telescopic frame, and a telescopic driver; the support is installed on the third driver, one end of the telescopic frame is installed on the support, the scraper is installed at the free end of the telescopic frame, and the telescopic driver is installed on the telescopic frame to drive the telescopic frame to stretch and drive the scraper to clean the thin coal seam particles on the top surface of the fixed beam.

[0011] Optionally, the scraper includes a driving component, a fixed section, and two sliding sections; the fixed section is arranged at the free end of the telescopic arm, and the two sliding sections are symmetrically and slidably sleeved on the fixed section; the driving component is arranged inside the fixed section, and the driving component is connected to the two sliding sections to drive the two sliding sections to slide synchronously and reversely along the length direction of the fixed section to be in a working state.

[0012] Optionally, the driving component includes a biaxial motor, two lead screws, and two moving blocks; the two lead screws are respectively connected to the two driving shafts of the biaxial motor, and the two moving blocks arranged on the two lead screws are respectively connected to the two sliding sections.

[0013] Optionally, a plurality of scraping teeth are arranged on the scraper, and a cutting angle of 75° - 80° is formed between the leading edge of the scraping teeth and the surface of the scraper; when the telescopic arm drives the scraper to clean, the scraping teeth can break the coal blocks adhered to the top surface of the fixed beam.

[0014] Optionally, the outer surface of the scraper is coated with a tungsten carbide cermet layer, a polyetheretherketone infiltration layer, and a fluorosilane molecular self-assembled film from the inside to the outside to form a gradient anti-adhesion coating.

[0015] Optionally, outer protection plates are arranged at the front end and both sides of the moving beam.

[0016] Optionally, a limiting component is arranged inside the moving beam; when the second driver drives the moving beam to slide outwards along the fixed beam to the maximum stroke, the limiting component abuts against the fixed beam to prevent the moving beam from falling off.

[0017] Optionally, the limiting component includes a limiting block, a fixing bolt and a nut; the limiting block is arranged inside the moving beam through the fixing bolt and the nut.

[0018] (III) Beneficial effects

[0019] The beneficial effects of the present invention are as follows:

[0020] A new telescopic mechanism for a hydraulic support provided by the present invention is hinged to the top beam of the hydraulic support through a fixed beam and is driven by a first driver to rotate in a vertical plane, which can flexibly adjust the fixed beam to the standby position or the support position, better meeting the requirements of different stages in the thin coal seam mining process. During the preparation stage of the mining operation, the fixed beam can be rotated to the standby position to facilitate the movement and arrangement of the equipment; during mining, it is rotated to the support position to provide stable support for the roof. The moving beam is slidably sleeved on the fixed beam through a guide rod and is driven by a second driver to slide, which can increase the support surface of the top beam of the hydraulic support for the thin coal seam roof. Since the roof of the thin coal seam is flat but relatively broken, a larger support surface can disperse the pressure more evenly, effectively avoiding the aggravation of roof breakage caused by local pressure concentration and ensuring the safety and stability of the mining space. An installation cavity for accommodating a cleaning mechanism is arranged inside the moving beam. During cleaning, the cleaning mechanism extends out to clean the thin coal seam particles falling on the top surface of the fixing plate, effectively solving the problem that the thin coal seam particles affect the recovery of the fixed beam and the moving beam from the support position to the standby position. It avoids the thin coal seam particles getting stuck in the key parts between the fixed beam and the moving beam, reduces the frictional resistance between components, prevents excessive wear of components, prolongs the service life of the equipment, ensures that the fixed beam and the moving beam can smoothly switch between the support position and the standby position, and improves the mining efficiency. Compared with the prior art, its design is more reasonable. The moving beam and the fixed beam are connected through a guide rod and driven by a driver, with a clear and simple structure, reducing the manufacturing cost and the maintenance difficulty. When a certain component fails, it is convenient for underground workers to carry out maintenance and replacement, reducing the equipment downtime and ensuring the continuity of the mining operation. Moreover, it has stronger adaptability and more advantages in processing and manufacturing costs Description of the drawings

[0021] Figure 1 is the overall structural schematic diagram of the new telescopic mechanism of the hydraulic support in Embodiment 1 of the present invention;

[0022] Figure 2 is the cross-sectional view of the new telescopic mechanism of the hydraulic support in Embodiment 1 of the present invention;

[0023] Figure 3It is a schematic structural diagram of the new telescopic mechanism of the hydraulic support in Embodiment 1 of the present invention installed on the roof beam;

[0024] Figure 4 It is a top view schematic diagram of the moving beam in Embodiment 1 of the present invention;

[0025] Figure 5 It is a front view schematic diagram of the moving beam in Embodiment 1 of the present invention;

[0026] Figure 6 It is a schematic structural diagram of the cleaning mechanism in Embodiment 1 of the present invention;

[0027] Figure 7 It is a schematic structural diagram of the working state of the scraper in Embodiment 1 of the present invention.

[0028]

Description of the reference numerals

[0029] 1: Fixed beam; 2: Moving beam; 21: Outer guard plate; 3: First driver; 4: Second driver; 5: Guide rod; 61: Third driver; 62: Support; 63: Telescopic frame; 64: Telescopic driver; 65: Fixed section; 66: Sliding section; 67: Lead screw; 68: Moving block; 69: Scraper tooth; 71: Limit block; 72: Fixed bolt. Detailed implementation manners

[0030] In order to better understand the above technical solutions, the exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and the scope of the present invention can be completely conveyed to those skilled in the art.

[0031] Embodiment 1:

[0032] As Figures 1-3As shown in the figure, the specific embodiment of the present invention provides a new telescopic mechanism for a hydraulic support, which includes a fixed beam 1, a moving beam 2, a first driver 3, a second driver 4, multiple guide rods 5, and a cleaning mechanism; one side of the fixed beam 1 is hinged to the top beam of the hydraulic support, and both ends of the first driver 3 are arranged on the top beam and the fixed beam 1 to drive the fixed beam 1 to rotate to the standby position or the support position in the vertical plane; one end of multiple guide rods 5 is fixed inside the moving beam 2, and the moving beam 2 is slidably sleeved on the fixed beam 1 through multiple guide rods 5; the second driver 4 is arranged inside the fixed beam 1, and the second driver 4 is connected to the moving beam 2 to drive the moving beam 2 to slide along the fixed beam 1, thereby increasing the support surface of the top beam of the hydraulic support on the roof of the thin coal seam; an installation cavity capable of accommodating the cleaning mechanism is arranged inside the moving beam 2, and the cleaning mechanism is arranged inside the installation cavity; during cleaning, the cleaning mechanism extends out of the installation cavity to clean the thin coal seam particles falling on the top surface of the fixed plate.

[0033] Specifically, by hinging the fixed beam 1 to the top beam of the hydraulic support and driving it to rotate in the vertical plane by the first driver 3, the fixed beam 1 can be flexibly adjusted to the standby position or the support position, better adapting to the requirements of different stages during the exploitation of thin coal seams. During the preparation stage of the mining operation, the fixed beam 1 can be rotated to the standby position to facilitate the movement and arrangement of the equipment; during mining, it is rotated to the support position to provide stable support for the roof. The moving beam 2 is slidably sleeved on the fixed beam 1 through the guide rods 5, and the moving beam 2 is driven to slide by the second driver 4, which can increase the support surface of the top beam of the hydraulic support on the roof of the thin coal seam. Since the roof of the thin coal seam is flat but relatively broken, a larger support surface can disperse the pressure more evenly, effectively avoiding the aggravation of roof breakage caused by local pressure concentration and ensuring the safety and stability of the mining space. An installation cavity capable of accommodating the cleaning mechanism is arranged inside the moving beam 2, and during cleaning, the cleaning mechanism extends out to clean the thin coal seam particles falling on the top surface of the fixed plate, effectively solving the problem that the thin coal seam particles affect the recovery of the fixed beam 1 and the moving beam 2 from the support position to the standby position. It avoids the thin coal seam particles getting stuck in the key parts between the fixed beam 1 and the moving beam 2, reduces the frictional resistance between components, prevents excessive wear of components, prolongs the service life of the equipment, ensures that the fixed beam 1 and the moving beam 2 can smoothly switch between the support position and the standby position, and improves the mining efficiency. Compared with the prior art, its design is more reasonable. The moving beam 2 and the fixed beam 1 are connected by the guide rods 5 and driven by the driver, with a clear and simple structure, reducing the manufacturing cost and maintenance difficulty. When a certain component fails, it is convenient for underground workers to repair and replace, reducing the equipment downtime and ensuring the continuity of the mining operation. And combined with the characteristics of the thin rock layer of the thin coal seam, through optimizing the layout in the structural design, while meeting the support strength requirements, lightweight is achieved. It reduces the weight of the entire hydraulic support, reduces the additional pressure on the roof, better meets the special requirements of thin coal seam mining, and further ensures the stability of the roof during the mining process. It has stronger adaptability and more advantages in processing and manufacturing costs.

[0034] Further, as Figure 6 shown, the cleaning mechanism includes a third driver 61, a telescopic arm, and a scraper; the third driver 61 is fixed in the installation cavity, the telescopic arm is installed at the driving end of the third driver 61, and the scraper is arranged at the free end of the telescopic arm; during cleaning, the third driver 61 can drive the telescopic arm to move out of the installation cavity and be located on one side of the fixing plate, and drive the scraper to clean the thin coal seam particles on the top surface of the fixing plate by extending the telescopic arm. The combined design of the third driver 61, the telescopic arm, and the scraper makes the cleaning operation more targeted and efficient. The third driver 61 is fixed in the installation cavity, can stably provide power, and accurately drive the telescopic arm to move to a specified position, ensuring that the scraper can accurately reach the area with thin coal seam particles on the top surface of the fixed beam 1. The extension of the telescopic arm drives the scraper to clean. Compared with manual cleaning, it not only saves manpower but also improves the cleaning speed, effectively reduces the adverse effects of thin coal seam particles on the telescopic mechanism, ensures the smooth operation of the telescopic mechanism, and further improves the working efficiency and stability of the entire hydraulic support.

[0035] Further, as Figure 6 shown, the telescopic arm includes a support 62, a telescopic frame 63, and a telescopic driver 64; the support 62 is installed on the third driver 61, one end of the telescopic frame 63 is installed on the support 62, the scraper is installed at the free end of the telescopic frame 63, and the telescopic driver 64 is installed on the telescopic frame 63 to drive the telescopic frame 63 to extend and drive the scraper to clean the thin coal seam particles on the top surface of the fixed beam 1. The support 62, the telescopic frame 63, and the telescopic driver 64 work together, making the cleaning action of the scraper more flexible. The support 62 provides a stable support foundation for the telescopic frame 63, and the telescopic driver 64 drives the telescopic frame 63 to extend. According to the distribution of thin coal seam particles at different positions on the top surface of the fixed beam 1, the cleaning range of the scraper can be flexibly adjusted, and the thin coal seam particles on the top surface of the fixed beam 1 can be cleaned more comprehensively and effectively, further enhancing the cleaning effect of the cleaning mechanism, ensuring the normal operation of the front beam of the hydraulic support, and reducing the risk of equipment failure.

[0036] Further, as Figure 6 and Figure 7As shown in the figure, the scraper includes a drive assembly, a fixed section 65 and two sliding sections 66; the fixed section 65 is arranged at the free end of the telescopic arm, and the two sliding sections 66 are symmetrically and slidably sleeved on the fixed section 65; the drive assembly is arranged in the fixed section 65, and the drive assembly is connected to the two sliding sections 66 to drive the two sliding sections 66 to slide synchronously and reversely along the length direction of the fixed section 65 to the working state. The cooperation of the drive assembly, the fixed section 65 and the two sliding sections 66 enables the scraper to adaptively adjust according to the actual width of the fixed beam 1 during operation. The two sliding sections 66 slide synchronously and reversely to better cover the top surface of the fixed beam 1, avoid cleaning dead corners, and improve the comprehensiveness and thoroughness of cleaning. This structural optimization effectively solves the problem of the adaptability between the width of the scraper and the fixed beam 1, ensuring that the scraper can fully play its cleaning role regardless of the change in the width of the fixed beam 1, and enhancing the practicability and versatility of the cleaning mechanism.

[0037] Further, as Figure 7 shown, the drive assembly includes a dual-axis motor, two lead screws 67 and two moving blocks 68; the two lead screws 67 are respectively connected to the two drive shafts of the dual-axis motor, and the two moving blocks 68 arranged on the two lead screws 67 are respectively connected to the two sliding sections 66. The combination of the dual-axis motor, the two lead screws 67 and the two moving blocks 68 provides stable and reliable power for the synchronous reverse sliding of the two sliding sections 66. The two drive shafts of the dual-axis motor respectively drive the two lead screws 67, so that the two moving blocks z8 drive the sliding sections 66 to slide smoothly, ensuring the accuracy and consistency of the expansion and contraction actions of the scraper, enhancing the stability and reliability of the scraper structure, further improving the working performance of the cleaning mechanism, and reducing the problem of incomplete cleaning caused by uncoordinated scraper actions.

[0038] Further, as Figure 7 shown, a plurality of scraping teeth 69 are arranged on the scraper, and the leading edge of the scraping teeth 69 forms a cutting angle of 75° - 80° with the surface of the scraper; when the telescopic arm drives the scraper to clean, the scraping teeth 69 can break the coal blocks adhered to the top surface of the fixed beam 1. Prevent its long-term accumulation from affecting the fit and support effect between the fixed beam 1 and the roof. The design of the scraping teeth 69 improves the cleaning ability of the cleaning mechanism for thin coal seam particles in different states, further ensures the normal operation of the front beam of the hydraulic support, and maintains the safety and stability of the mining operation.

[0039] Further, as Figure 1 and Figure 4As shown in the figure, outer guard plates 21 are provided at the front end and both sides of the movable beam 2, which play a good protective role. The outer guard plates 21 can prevent impurities such as thin coal seam particles and dust from entering the gap between the movable beam 2 and the fixed beam 1, prevent wear and damage to key components such as the guide rod 5 and the drive, and extend the service life of the equipment. At the same time, the outer guard plates 21 can also protect the internal structure and components of the movable beam 2 to a certain extent, reduce the risk of damage caused by external collisions and other factors, and improve the reliability and stability of the front beam of the hydraulic support.

[0040] Furthermore, as Figure 1 shown in the figure, a limiting component is arranged inside the movable beam 2; when the second drive 4 drives the movable beam 2 to slide outward along the fixed beam 1 to the maximum stroke, the limiting component abuts against the fixed beam 1 to provide reliable limiting protection and prevent the movable beam 2 from falling off and causing a safety accident. Specifically, the limiting component includes a limiting block 71, a fixing bolt 72 and a nut; the limiting block 71 is arranged inside the movable beam 2 through the fixing bolt 72 and the nut.

[0041] The usage situation of the new telescopic mechanism of the hydraulic support provided in this embodiment is as follows: when it is necessary to support the roof of the thin coal seam, the first drive 3 is started to rotate the fixed beam 1 to the support position. Subsequently, the second drive 4 drives the movable beam 2 to slide along the fixed beam 1. The limiting component will play a role when the movable beam 2 slides to the maximum stroke to prevent the movable beam 2 from falling off and ensure the safety and stability of the support operation. The sliding of the movable beam 2 increases the support surface of the top beam of the hydraulic support for the roof, adapts to the characteristics of the broken and low-pressure roof of the thin coal seam, evenly disperses the pressure, effectively guarantees the stability of the roof, and provides a safe space for the mining operation. When the support is over, after the fixed beam 1 rotates back to the standby position, the cleaning operation starts. The third drive 61 is started to push the telescopic arm with the scraper to extend out of the installation cavity and reach the top surface of the fixed beam 1. The support 62, the telescopic frame 63 and the telescopic drive 64 of the telescopic arm cooperate with each other to flexibly adjust the position of the scraper and the cleaning range. The drive component of the scraper drives the two sliding sections 66 to unfold, so that it can be adaptively adjusted according to the width of the fixed beam 1 to comprehensively clean the thin coal seam particles. The scraping teeth 69 on the scraper can break the adhered coal blocks to improve the cleaning effect. The gradient anti-adhesion coating on the surface of the scraper can reduce particle adhesion and ensure efficient cleaning, so that the top surface of the fixed beam 1 remains clean.

[0042] Embodiment 2:

[0043] This embodiment provides a new telescopic mechanism for a hydraulic support, including all the structures of the front beam of the hydraulic support described in Embodiment 1.

[0044] Furthermore, in this embodiment, the outer surface of the scraper is coated with a tungsten carbide cermet layer, a polyether ether ketone permeation layer, and a fluorosilane molecular self-assembled film from the inside to the outside to form a gradient anti-adhesion coating, effectively solving the problem of the scraper sticking to the thin coal seam particles during the cleaning process. The tungsten carbide cermet layer provides high hardness and wear resistance, extending the service life of the scraper; the polyether ether ketone permeation layer enhances the bonding force between the coating and the scraper and has certain anti-friction properties; the fluorosilane molecular self-assembled film utilizes its low surface energy characteristics to make it difficult for the thin coal seam particles to adhere to the surface of the scraper. This gradient anti-adhesion coating can reduce the residue after the scraper is cleaned, reduce the cleaning difficulty, improve the cleaning efficiency, and ensure the continuous and efficient operation of the scraper.

[0045] In the description of the present invention, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0046] In the present invention, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0048] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0049] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A new telescopic mechanism for a hydraulic support, characterized in that it includes a fixed beam (1), a moving beam (2), a first driver (3), a second driver (4), multiple guide rods (5) and a cleaning mechanism; One side of the fixed beam (1) is hinged to the top beam of the hydraulic support. The two ends of the first driver (3) are arranged on the top beam and the fixed beam (1) to drive the fixed beam (1) to rotate to the standby position or the support position in the vertical plane; One end of multiple guide rods (5) is fixed inside the moving beam (2). The moving beam (2) is slidably sleeved on the fixed beam (1) through multiple guide rods (5). The second driver (4) is arranged inside the fixed beam (1). The second driver (4) is connected to the moving beam (2) to drive the moving beam (2) to slide along the fixed beam (1), thereby increasing the support surface of the top beam of the hydraulic support for the roof of the thin coal seam; An installation cavity capable of accommodating the cleaning mechanism is arranged inside the moving beam (2). The cleaning mechanism is arranged inside the installation cavity. During cleaning, the cleaning mechanism extends from the installation cavity to clean the thin coal seam particles falling on the top surface of the fixed plate.

2. The new telescopic mechanism for a hydraulic support according to claim 1, characterized in that the cleaning mechanism includes a third driver (61), a telescopic arm and a scraper; The third driver (61) is fixed to the installation cavity. The telescopic arm is installed at the driving end of the third driver (61). The scraper is arranged at the free end of the telescopic arm; During cleaning, the third driver (61) can drive the telescopic arm to move out of the installation cavity and be located on one side of the fixed plate, and drive the scraper to clean the thin coal seam particles on the top surface of the fixed plate by stretching the telescopic arm.

3. The new telescopic mechanism for a hydraulic support according to claim 2, characterized in that the telescopic arm includes a support (62), a telescopic frame (63) and a telescopic driver (64); The support (62) is installed on the third driver (61). One end of the telescopic frame (63) is installed on the support (62). The scraper is installed at the free end of the telescopic frame (63). The telescopic driver (64) is installed on the telescopic frame (63) to drive the telescopic frame (63) to stretch and drive the scraper to clean the thin coal seam particles on the top surface of the fixed beam (1).

4. The new telescopic mechanism for a hydraulic support according to claim 2, characterized in that the scraper includes a driving component, a fixed section (65) and two sliding sections (66); The fixed section (65) is arranged at the free end of the telescopic arm. The two sliding sections (66) are symmetrically and slidably sleeved on the fixed section (65). The driving component is arranged inside the fixed section (65). The driving component is connected to the two sliding sections (66) to drive the two sliding sections (66) to slide synchronously and reversely along the length direction of the fixed section (65) to expand into the working state.

5. The new telescopic mechanism for a hydraulic support according to claim 4, characterized in that the driving component includes a double-shaft motor, two lead screws (67) and two moving blocks (68); The two lead screws (67) are respectively connected to the two driving shafts of the double-shaft motor. The two moving blocks (68) arranged on the two lead screws (67) are respectively connected to the two sliding sections (66).

6. The new telescopic mechanism for a hydraulic support according to claim 2, characterized in that A plurality of scraping teeth (69) are provided on the scraping plate, and a cutting angle of 75° to 80° is formed between the leading edge of the scraping teeth (69) and the surface of the scraping plate; When the telescopic arm drives the scraping plate to clean, the scraping teeth (69) can break the coal blocks adhered to the top surface of the fixed beam (1).

7. The novel telescopic mechanism of a hydraulic support according to claim 2, wherein The outer surface of the scraping plate is coated with a tungsten carbide cermet layer, a polyether ether ketone penetration layer and a fluorosilane molecular self-assembled film from the inside to the outside to form a gradient anti-adhesion coating.

8. The novel telescopic mechanism of a hydraulic support according to claim 1, wherein Outer protection plates (21) are provided at the front end and both sides of the moving beam (2).

9. The novel telescopic mechanism of a hydraulic support according to claim 1, wherein A limiting component is arranged inside the moving beam (2); When the second driver (4) drives the moving beam (2) to slide outwards along the fixed beam (1) to the maximum stroke, the limiting component abuts against the fixed beam (1) to prevent the moving beam (2) from falling off.

10. The novel telescopic mechanism of a hydraulic support according to claim 9, wherein The limiting component includes a limiting block (71), a fixing bolt (72) and a nut; The limiting block (71) is arranged inside the moving beam (2) through the fixing bolt (72) and the nut.

Images