A hydraulic support for fully-mechanized coal mining face

Abstract

The application discloses a kind of hydraulic support of coal mine fully mechanized working face, including roof beam, support plate and support assembly, the support plate includes first plate body and second plate body, the support assembly includes first hydraulic cylinder, drill rod, motor and support sleeve, the telescopic rod can be telescopic along the thickness direction of the second plate body to drive the drill rod pass through the through hole and drill on the coal wall, the outer circumferential surface of the support sleeve is stopped on the inner wall of the drill hole, to support the support plate.The hydraulic support of coal mine fully mechanized working face of the application increases the support area of support plate to coal wall during supporting process, prevents coal wall from producing rib spalling phenomenon because of too large mining height, greatly reduces the risk of coal wall rib spalling, so as to improve the safety of the whole mining.In addition, the support sleeve can transmit support force upward to the support plate, and the support plate in turn transmits the support force upward to the front end of the roof beam, improving the support effect of the front end of the hydraulic support to the roof and reducing the risk of roof collapse.

Description

Technical Field

[0001] This invention relates to the field of hydraulic support technology, specifically to a hydraulic support for a fully mechanized coal mining face. Background Technology

[0002] In ultra-high fully mechanized longwall mining faces in coal mines, traditional hydraulic support technology faces several challenges and shortcomings, particularly in controlling mine pressure. Specifically, the upward force of the support column cylinders is mainly transmitted to the rear half of the roof beam, while providing less support to the telescopic roof beam at the front of the support. This unbalanced force distribution results in insufficient support of the roadway roof at the front of the support, increasing the risk of roof collapse at the front of the coal face. Furthermore, due to the large coal wall height, traditional sidewalls are insufficient in their support capacity and struggle to resist coal wall spalling. This not only increases the risk of coal wall spalling but also reduces the overall safety of mining operations. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of the present invention propose a hydraulic support for a fully mechanized coal mining face.

[0005] The hydraulic support for a fully mechanized coal mining face according to an embodiment of the present invention includes a top beam, a side guard plate, and a support assembly. The side guard plate includes a first plate and a second plate. The first plate is rotatably connected to the top beam, and the second plate is adjustablely connected to the first plate along the length direction of the first plate. The first plate and the second plate are used to abut against the coal wall. The second plate is provided with a through hole extending along the thickness direction of the second plate.

[0006] The support assembly is located on the inner end face of the second plate. The support assembly includes a first hydraulic cylinder, a drill rod, a motor, and a support sleeve. The first hydraulic cylinder includes a cylinder body and a telescopic rod. The cylinder body is connected to the second plate. The motor is mounted on the telescopic rod. The drill rod is coaxial with the telescopic rod and connected to the output shaft of the motor, so that the motor drives the drill rod to rotate. The support sleeve is fitted on the telescopic rod. The telescopic rod can extend and retract along the thickness direction of the second plate to drive the drill rod to pass through the through hole and drill a hole in the coal wall. The outer peripheral surface of the support sleeve abuts against the inner wall of the drill hole to support the side protection plate.

[0007] In some embodiments, the telescopic rod has a receiving cavity and an opening, a supporting bearing is provided in the receiving cavity, one end of the drill rod extends into the receiving cavity through the opening and is connected to the supporting bearing, and the motor is located in the receiving cavity and connected to the drill rod.

[0008] In some embodiments, there are multiple support bearings, which are arranged at axial intervals along the telescopic rod.

[0009] In some embodiments, the drill rod has a gas collecting chamber, and the side wall of the drill rod has an air inlet communicating with the gas collecting chamber. The air inlet is used for gas in the borehole to enter the gas collecting chamber. The gas collecting chamber is connected to the receiving chamber, and the receiving chamber is provided with a gas concentration sensor and a controller. The gas concentration sensor is used to detect the gas concentration in the borehole. The gas concentration sensor is connected to the coal mining machine via the controller. The controller is configured to control and adjust the coal mining speed and feed rate of the coal mining machine based on the detection value of the gas concentration sensor.

[0010] In some embodiments, a support rod coaxial with the drill rod is provided in the gas collecting chamber. An installation hole is provided on the side wall of the support rod. A push pin is slidably connected in the installation hole. A return spring is provided between the bottom end of the push pin and the bottom wall of the installation hole. The top end of the push pin is spaced apart from the air inlet and coaxial with the axis of the air inlet. When the drill rod rotates, the push pin moves outward from the drill rod under the action of centrifugal force and passes through the air inlet to prevent coal dust from clogging the air inlet.

[0011] In some embodiments, the support rod is provided with a guide sleeve, the guide sleeve is perpendicular to the support rod and coaxial with the axis of the mounting hole, and the ejector pin passes through the guide sleeve.

[0012] In some embodiments, the first plate has a groove, a portion of the second plate is slidably disposed within the groove, and the first plate is provided with a second hydraulic cylinder connected to the second plate for driving the second plate to slide, thereby adjusting the position of the second plate relative to the first plate.

[0013] In some embodiments, the hydraulic support for a fully mechanized coal mining face according to the present invention includes a mounting shell, which is disposed on the inner side of the second plate. The mounting shell has a mounting cavity and a mounting opening, the mounting opening communicating with the through hole, and the support assembly disposed in the mounting cavity.

[0014] In some embodiments, a coal leakage groove is provided on the outer end face of the second plate. The coal leakage groove extends along the length direction of the second plate and communicates with the through hole. The coal leakage groove is used to discharge the coal dust generated by the drill rod during drilling.

[0015] In some embodiments, the support sleeve includes a tapered section and a constant-diameter section, the cross-sectional area of ​​the tapered section gradually increasing along the direction of the drill rod toward the telescopic rod, and the outer diameter of the constant-diameter section being equal to the maximum outer diameter of the tapered section.

[0016] Therefore, in the hydraulic support of the fully mechanized coal mining face according to this embodiment of the invention, the first and second plates are adjustablely connected during the support process, increasing the support area of ​​the side guard plate on the coal wall, preventing coal wall spalling due to excessive mining height, greatly reducing the risk of coal wall spalling, and thus improving the overall safety of mining. Furthermore, the support sleeve can transfer the supporting force upwards to the side guard plate, which in turn transfers the supporting force upwards to the front end of the top beam, so that the front end of the top beam provides greater supporting force to the roof of the fully mechanized coal mining face, improving the support effect of the hydraulic support front end on the roof and reducing the risk of roof collapse. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the hydraulic support for a fully mechanized coal mining face according to an embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram illustrating the use of hydraulic supports in a fully mechanized coal mining face according to an embodiment of the present invention.

[0019] Figure 3 yes Figure 1 An enlarged schematic diagram of part A in the middle.

[0020] Figure 4 This is a schematic diagram of the drill pipe structure according to an embodiment of the present invention.

[0021] Figure 5 This is a schematic diagram illustrating the use of hydraulic supports in a fully mechanized coal mining face according to an embodiment of the present invention.

[0022] Figure 6 yes Figure 1 Enlarged schematic diagram of part B.

[0023] Figure label: 100. Hydraulic support for fully mechanized coal mining face; 200. Coal wall; 300. Drill hole; 400. Coal mining machine; 1. Top beam; 2. Side guard plate; 201. First plate; 2011. Slide groove; 202. Second plate; 2021. Through hole; 2022. Coal leakage chute; 3. Support assembly; 301. First hydraulic cylinder; 3011. Cylinder body; 3012. Telescopic rod; 30121. Receiving cavity; 30 2. Drill rod; 3021. Gas collection chamber; 3022. Air inlet; 303. Motor; 304. Support sleeve; 3041. Tapered section; 3042. Equal diameter section; 305. Support bearing; 306. Support rod; 3061. Mounting hole; 307. Ejector pin; 308. Return spring; 309. Guide sleeve; 4. Gas concentration sensor; 5. Second hydraulic cylinder; 6. Mounting shell; 601. Mounting cavity. Detailed Implementation

[0024] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0025] like Figures 1 to 6 As shown, the hydraulic support 100 for a fully mechanized coal mining face according to an embodiment of the present invention includes a top beam 1, a side guard plate 2, and a support assembly 3. The side guard plate 2 includes a first plate 201 and a second plate 202. The first plate 201 is rotatably connected to the top beam 1, and the second plate 202 is adjustablely connected to the first plate 201 along its length. The first plate 201 and the second plate 202 are used to abut against the coal wall 200, and the second plate 202 is provided with a through hole 2021 extending along its thickness direction.

[0026] The support assembly 3 is disposed on the inner end face of the second plate 202. The support assembly 3 includes a first hydraulic cylinder 301, a drill rod 302, a motor 303, and a support sleeve 304. The first hydraulic cylinder 301 includes a cylinder body 3011 and a telescopic rod 3012. The cylinder body 3011 is connected to the second plate 202, and the motor 303 is disposed on the telescopic rod 3012. The drill rod 302 is coaxial with the telescopic rod 3012 and is connected to the output shaft of the motor 303 so that the motor 303 drives the drill rod 302 to rotate. The support sleeve 304 is sleeved on the telescopic rod 3012. The telescopic rod 3012 can extend and retract along the thickness direction of the second plate 202 to drive the drill rod 302 to pass through the through hole 2021 to drill a hole 300 in the coal wall 200. The outer peripheral surface of the support sleeve 304 abuts against the inner wall of the drill hole 300 to support the side guard plate 2.

[0027] like Figure 1 and Figure 5 As shown, the top beam 1102 of the hydraulic support 100 abuts against the roof of the fully mechanized mining face, and the side guard plate 2101 abuts against the coal wall 200 to be cut. A support space is formed between the side guard plate 2101 and the top beam 1102 for the movement of the coal mining machine 400, so that the coal mining machine 400 can cut coal from the coal wall 200. After the coal mining machine 400 completes one coal cutting cycle, the hydraulic support 100 and the coal mining machine 400 are pushed and moved to continuously cut coal from the coal wall 200.

[0028] In use, the hydraulic support 100 for a fully mechanized coal mining face according to this embodiment of the invention first adjusts the position of the second plate 202 along the length of the first plate 201 to extend the second plate 202. Then, the first plate 201 and the second plate 202 of the side support plate 2 are abutted against the coal wall 200. Next, the motor 303 is started to drive the drill rod 302 to rotate. Simultaneously, the telescopic rod of the first hydraulic cylinder 301 pushes the drill rod 303 towards the coal wall 200, causing the drill rod 302 to pass through the through hole 2021 and form a drill hole 300 in the coal wall 200. After the drill hole 300 is formed, under the pushing force of the telescopic rod 3012, the support sleeve 304 enters the drill hole 300, and the outer circumferential surface of the support sleeve 304 abuts against the inner wall of the drill hole 300, thereby providing support for the side support plate 2 in the height direction of the coal wall 200.

[0029] Therefore, in the support process of the hydraulic support 100 for the fully mechanized coal mining face of this embodiment of the invention, the first plate 201 and the second plate 202 are arbitrarily connected, increasing the support area of ​​the side guard plate 2 on the coal wall 200, preventing the coal wall 200 from spalling due to excessive mining height, greatly reducing the risk of coal wall spalling, and thus improving the safety of the entire mining process. Furthermore, the support sleeve 304 can transmit the supporting force upwards to the side guard plate 2, which in turn transmits the supporting force upwards to the front end of the top beam 1, so that the front end of the top beam 1 provides greater supporting force to the roof of the fully mechanized coal mining face, improving the support effect of the hydraulic support front end on the roof and reducing the risk of roof collapse.

[0030] In some embodiments, the telescopic rod 3012 has a receiving cavity 30121 and an opening. A support bearing 305 is provided in the receiving cavity 30121. One end of the drill rod 302 extends into the receiving cavity 30121 through the opening and is connected to the support bearing 305. A motor 303 is provided in the receiving cavity 30121 and is connected to the drill rod 302.

[0031] like Figure 3 and Figure 6 As shown, by incorporating a support bearing 305 within the telescopic rod 3012, the frictional force experienced by the drill rod 302 during rotation and extension is reduced, thereby decreasing wear. The support bearing 305 enhances the stability of the drill rod 302, resulting in a smoother drilling process and ensuring drilling quality. Since both the motor 303 and the drill rod 302 are located within the receiving cavity 30121 of the telescopic rod 3012, they are protected and less susceptible to external environmental influences, improving the reliability and durability of the equipment. Integrating the motor 303 and support bearing 305 within the telescopic rod 3012 makes the overall structure more compact, effectively utilizing space and reducing the size and weight of the equipment.

[0032] In some embodiments, there are multiple support bearings 305, which are arranged at axial intervals along the telescopic rod 3012.

[0033] The even distribution of multiple support bearings 305 helps improve the stability of the drill rod 302, reducing its vibration and misalignment during operation. Distributing the load reduces wear on individual support bearings 305, thereby extending the overall service life of the bearings and the drill rod 302. A stable drill rod 302 allows for more efficient drilling of the borehole 300, improving the support efficiency of the coal wall 200 and accelerating the mining speed. Because the load on each support bearing 305 is reduced, the frequency of replacement and maintenance is correspondingly decreased.

[0034] In some embodiments, the drill rod 302 has a gas collecting chamber 3021, and the side wall of the drill rod 302 has an air inlet 3022 communicating with the gas collecting chamber 3021. The air inlet 3022 is used for gas in the borehole 300 to enter the gas collecting chamber 3021. The gas collecting chamber 3021 is connected to a receiving chamber 30121, and a gas concentration sensor 4 and a controller are provided in the receiving chamber 30121. The gas concentration sensor 4 is used to detect the gas concentration in the borehole 300. The gas concentration sensor 4 is connected to the coal mining machine 400 via the controller, and the controller is configured to control and adjust the coal mining speed and feed rate of the coal mining machine 400 according to the detection value of the gas concentration sensor 4.

[0035] Specifically, the drill rod 302 is internally designed with a gas collecting chamber 3021, which is used to collect methane gas released from the coal mine to be excavated into the borehole 300. Methane entering the borehole 300 enters the gas collecting chamber 3021 through the air inlet 3022. Since the gas collecting chamber 3021 is connected to the receiving chamber 30121, the methane in the gas collecting chamber 3021 enters the receiving chamber 30121 and is detected by the methane concentration sensor 4. The controller judges the data detected by the methane concentration sensor 4. If the methane concentration in the borehole 300 exceeds the threshold, the cutting speed and feed rate of the coal mining machine 400 are reduced to prevent the methane in the coal seam from being released too quickly per unit time, thus avoiding excessive methane concentration in the fully mechanized mining face. If the methane concentration in the borehole 300 does not exceed the threshold, the cutting speed and feed rate of the coal mining machine 400 are increased to increase the coal mining speed.

[0036] Therefore, the hydraulic support 100 of the fully mechanized coal mining face in this embodiment of the invention can detect the gas concentration in the coal seam to be cut in advance, and make a judgment on the gas concentration in the coal seam to be cut, so as to provide early warning and adjust the cutting speed and feed rate of the coal mining machine 400 in real time. This avoids the problem of excessive gas concentration in the fully mechanized coal mining face due to excessive cutting speed and feed rate of the coal mining machine 400, which would cause the fully mechanized coal mining face to release too much gas per unit time. This can avoid the problem of the coal mining machine 400 stopping due to excessive gas concentration in the fully mechanized coal mining face, save the time for diffusion and dilution of gas in the fully mechanized coal mining face, and improve the coal mining efficiency.

[0037] In some embodiments, a support rod 306 coaxial with the drill rod 302 is provided in the gas collecting chamber 3021. A mounting hole 3061 is provided on the side wall of the support rod 306, and a ejector pin 307 is slidably connected within the mounting hole 3061. A return spring 308 is provided between the bottom end of the ejector pin 307 and the bottom wall of the mounting hole 3061. The top end of the ejector pin 307 is spaced apart from the air inlet hole 3022 and coaxial with the axis of the air inlet hole 3022. When the drill rod 302 rotates, the ejector pin 307 moves outward from the drill rod 302 under the action of centrifugal force and passes through the air inlet hole 3022 to prevent coal dust from clogging the air inlet hole 3022.

[0038] like Figure 4 As shown, the air collecting chamber 3021 contains a support rod 306 coaxial with the drill rod 302. This support rod 306 is used to maintain the stability and correct position of the drill rod 302. Mounting holes 3061 are formed on the side wall of the support rod 306 for mounting ejector pins 307. Ejector pins 307 are slidably connected within the mounting holes 3061, allowing them to move within the holes. The top of the ejector pins 307 is spaced apart from the air inlet holes 3022 and coaxial with the axis of the air inlet holes 3022. This design allows the ejector pins 307 to move outward under centrifugal force and pass through the air inlet holes 3022 when the drill rod 302 rotates.

[0039] When the drill rod 302 rotates, the ejector pin 307 moves outward due to centrifugal force, which prevents coal dust from entering the air inlet 3022 and clogging the orifice. When the drill rod 302 stops rotating, the ejector pin 307 will return to its original position under the action of the return spring 308, so that the gas in the borehole 300 can enter the gas collecting chamber 3021 through the air inlet 3022.

[0040] The centrifugal force of the ejector pin 307 effectively prevents coal dust and other debris from clogging the air inlet 3022 during drilling, ensuring smooth gas flow. The design of the return spring 308 allows the ejector pin 307 to automatically return to its original position after the drill rod 302 stops rotating, preventing the ejector pin 307 from clogging the air inlet 3022 and facilitating gas flow.

[0041] In some embodiments, a guide sleeve 309 is provided on the support rod 306. The guide sleeve 309 is perpendicular to the support rod 306 and coaxial with the axis of the mounting hole 3061. The ejector pin 307 passes through the guide sleeve 309.

[0042] like Figure 4 As shown, the design of the guide sleeve 309 ensures the linear movement of the ejector pin 307 under centrifugal force, improving the accuracy of the ejector pin 307 in aligning with the air inlet 3022. The guiding effect of the guide sleeve 309 on the ejector pin 307 increases the stability of the ejector pin 307 and reduces its vibration during movement. The precise alignment and stable movement of the ejector pin 307 can more effectively prevent coal dust from clogging the air inlet 3022, maintaining the smooth flow of gas.

[0043] In some embodiments, the first plate 201 has a groove 2011, a portion of the second plate 202 is slidably disposed in the groove 2011, and the first plate 201 is provided with a second hydraulic cylinder 5, which is connected to the second plate 202 for driving the second plate 202 to slide, so as to adjust the position of the second plate 202 relative to the first plate 201.

[0044] like Figure 1 , Figure 2 and Figure 5 As shown, by adjusting the position of the second plate 202, it can better adapt to the shape and position of the coal wall 200, improving the fit of the support. Precise adjustment of the position of the second plate 202 can enhance the support effect on the coal wall 200 and reduce the risk of roof collapse. Effective support can reduce the risk of roof collapse and improve mining safety. The drive of the second hydraulic cylinder 5 makes the position adjustment of the second plate 202 more flexible and convenient, allowing for rapid adjustment according to actual needs. By improving the adaptability and effectiveness of the support, the overall efficiency of the mining process can be improved.

[0045] In some embodiments, the hydraulic support 100 for a fully mechanized coal mining face of the present invention includes a mounting shell 6, which is disposed inside the second plate 202. The mounting shell 6 has a mounting cavity 601 and a mounting opening, which communicates with a through hole 2021. The support assembly 3 is disposed in the mounting cavity 601.

[0046] like Figure 3 and Figure 6 As shown, the mounting shell 6 provides a protective environment for the support component 3, preventing dust, coal dust, and other impurities from entering the component and extending its service life. The design of the mounting shell 6 makes the installation and replacement of the support component 3 more convenient, reducing maintenance costs and time. The compact design of the mounting shell 6 and mounting cavity 601 does not occupy excessive space, maintaining the overall compactness of the bracket. The mounting shell 6 protects the support component 3 from damage by the external environment, improving the safety of the bracket.

[0047] In some embodiments, a coal leakage groove 2022 is provided on the outer end face of the second plate 202. The coal leakage groove 2022 extends along the length direction of the second plate 202 and communicates with the through hole 2021. The coal leakage groove 2022 is used to discharge the coal dust generated by the drill rod 302 when drilling the hole 300.

[0048] like Figure 3 and Figure 6 As shown, specifically, when the drill rod 302 rotates and drills a hole 300 in the coal wall 200, coal dust is guided into the coal drain trough 2022 and discharged outside the support through the trough's opening. The design of the coal drain trough 2022 ensures that the coal dust generated during drilling 300 can be discharged in a timely manner, preventing coal dust from accumulating in the hole 300 channel and keeping the hole 300 unobstructed. Because the coal dust can be discharged in a timely manner, the drilling efficiency of the drill rod 302 will not decrease due to the accumulation of coal dust. The automatic dust removal function of the coal drain trough 2022 reduces the need for manual cleaning of the hole 300 channel, reducing labor intensity and cleaning costs.

[0049] In some embodiments, the support sleeve 304 includes a tapered section 3041 and a constant diameter section 3042. The cross-sectional area of ​​the tapered section 3041 gradually increases along the drill rod 302 toward the telescopic rod 3012, and the outer diameter of the constant diameter section 3042 is equal to the maximum outer diameter of the tapered section 3041.

[0050] like Figure 3 and Figure 6 As shown, the support sleeve 304 consists of a tapered section 3041 and a constant-diameter section 3042. The cross-sectional area of ​​the tapered section 3041 gradually increases along the drill rod 302 toward the telescopic rod 3012. This design allows the tapered section 3041 to act as a guide during the drilling process of the drill rod 302, so that the outer circumference of the constant-diameter section 3042 can smoothly abut against the inner wall of the borehole 300, improving the support effect of the support sleeve 304. The tapered section 3041 can fit tightly against the inner wall of the borehole 300, forming a good sealing effect, so that all the gas released from the coal seam into the borehole 300 can be detected by the gas concentration sensor 4, which helps to improve the detection accuracy and effectively adjust the cutting speed and feed rate of the coal mining machine 400.

[0051] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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, they should not be construed as limitations on this invention.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0053] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0054] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0055] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0056] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A hydraulic support for a fully mechanized coal mining face, characterized in that, include: Top beam (1); Side protection plate (2), the side protection plate (2) includes a first plate body (201) and a second plate body (202), the first plate body (201) is rotatably connected to the top beam (1), the second plate body (202) is variably connected to the first plate body (201) along the length direction of the first plate body (201), the first plate body (201) and the second plate body (202) are used to abut against the coal wall (200), the second plate body (202) is provided with a through hole (2021) extending along the thickness direction of the second plate body (202). A support assembly (3) is disposed on the inner end face of the second plate (202). The support assembly (3) includes a first hydraulic cylinder (301), a drill rod (302), a motor (303), and a support sleeve (304). The first hydraulic cylinder (301) includes a cylinder body (3011) and a telescopic rod (3012). The cylinder body (3011) is connected to the second plate (202). The motor (303) is disposed on the telescopic rod (3012). The drill rod (302) and the telescopic rod (3012) are connected together. The shaft is connected to the output shaft of the motor (303) so that the motor (303) drives the drill rod (302) to rotate. The support sleeve (304) is sleeved on the telescopic rod (3012). The telescopic rod (3012) can extend and retract along the thickness direction of the second plate (202) to drive the drill rod (302) to pass through the through hole (2021) and drill a hole (300) in the coal wall (200). The outer peripheral surface of the support sleeve (304) abuts against the inner wall of the drill hole (300) to support the side plate (2).

2. The hydraulic support for a fully mechanized coal mining face according to claim 1, characterized in that, The telescopic rod (3012) has a receiving cavity (30121) and an opening. A support bearing (305) is provided in the receiving cavity (30121). One end of the drill rod (302) extends into the receiving cavity (30121) through the opening and is connected to the support bearing (305). The motor (303) is located in the receiving cavity (30121) and is connected to the drill rod (302).

3. The hydraulic support for a fully mechanized coal mining face according to claim 2, characterized in that, The number of the support bearings (305) is multiple, and the multiple support bearings (305) are arranged at intervals along the axial direction of the telescopic rod (3012).

4. The hydraulic support for a fully mechanized coal mining face according to claim 2, characterized in that, The drill rod (302) has a gas collecting chamber (3021), and the side wall of the drill rod (302) has an air inlet (3022) communicating with the gas collecting chamber (3021). The air inlet (3022) is used for the gas in the borehole (300) to enter the gas collecting chamber (3021). The gas collecting chamber (3021) is connected to the receiving chamber (30121). The receiving chamber (30121) is equipped with a gas concentration sensor (4) and a controller. The gas concentration sensor (4) is used to detect the gas concentration in the borehole (300). The gas concentration sensor (4) is connected to the coal mining machine (400) through the controller. The controller is configured to control and adjust the coal mining speed and feed rate of the coal mining machine (400) according to the detection value of the gas concentration sensor (4).

5. The hydraulic support for a fully mechanized coal mining face according to claim 4, characterized in that, The gas collecting chamber (3021) is provided with a support rod (306) coaxial with the drill rod (302). The support rod (306) has an installation hole (3061) on its side wall. A push pin (307) is slidably connected in the installation hole (3061). A return spring (308) is provided between the bottom end of the push pin (307) and the bottom wall of the installation hole (3061). The top end of the push pin (307) is spaced apart from the air inlet (3022) and is coaxial with the axis of the air inlet (3022). When the drill rod (302) rotates, the push pin (307) moves to the outside of the drill rod (302) under the action of centrifugal force and passes through the air inlet (3022) to prevent coal dust from clogging the air inlet (3022).

6. The hydraulic support for a fully mechanized coal mining face according to claim 5, characterized in that, The support rod (306) is provided with a guide sleeve (309), the guide sleeve (309) is perpendicular to the support rod (306) and coaxial with the axis of the mounting hole (3061), and the ejector pin (307) passes through the guide sleeve (309).

7. The hydraulic support for a fully mechanized coal mining face according to claim 1, characterized in that, The first plate (201) has a groove (2011), and a portion of the second plate (202) is slidably disposed in the groove (2011). The first plate (201) is provided with a second hydraulic cylinder (5), which is connected to the second plate (202) for driving the second plate (202) to slide, so as to adjust the position of the second plate (202) relative to the first plate (201).

8. The hydraulic support for a fully mechanized coal mining face according to claim 1, characterized in that, The device includes a mounting shell (6) located inside the second plate (202). The mounting shell (6) has a mounting cavity (601) and a mounting opening, which communicates with the through hole (2021). The support assembly (3) is located inside the mounting cavity (601).

9. The hydraulic support for a fully mechanized coal mining face according to claim 1, characterized in that, The second plate (202) has a coal leakage groove (2022) on its outer end face. The coal leakage groove (2022) extends along the length direction of the second plate (202) and communicates with the through hole (2021). The coal leakage groove (2022) is used to discharge the coal dust generated by the drill rod (302) when drilling (300).

10. The hydraulic support for a fully mechanized coal mining face according to claim 1, characterized in that, The support sleeve (304) includes a tapered section (3041) and a constant diameter section (3042). The cross-sectional area of ​​the tapered section (3041) gradually increases along the direction of the drill rod (302) toward the telescopic rod (3012). The outer diameter of the constant diameter section (3042) is equal to the maximum outer diameter of the tapered section (3041).

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