Temporary support devices for coal mine roadways

Abstract

This invention provides a temporary support device for coal mine roadways, comprising a main body, a support frame, and an adjustment assembly. The support frame includes a first sub-frame and a second sub-frame connected to each other. The first sub-frame is connected to the main body and is rotatable relative to the main body in the width direction. The second sub-frame is rotatable relative to the first sub-frame in the length direction of the main body. A guard plate assembly is provided on the second sub-frame. The adjustment assembly includes a first driver, the output end of which is connected to the second sub-frame for transmission. The first driver drives the second sub-frame to rotate relative to the first sub-frame, so that the guard plate assembly adapts to the inclination angle of the roadway roof. This invention can adapt to the inclination angle of the roadway roof, achieving effective support and ensuring the safe operation of coal mines.

Description

Technical Field

[0001] This invention relates to the field of roadway support technology, specifically to a temporary support device for coal mine roadways. Background Technology

[0002] In coal mining, temporary support devices can create safe zones in roadways, providing safety for operating equipment and personnel. Most temporary support devices are designed for horizontal or slightly inclined roofs. However, in deep-angle tunneling operations, the roof angle often changes. This change in roof angle alters the contact between the support points and the roadway roof, leading to uneven distribution of support force and an inability to provide stable support, posing serious safety risks. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose a temporary support device for coal mine roadways, which can adapt to the inclination angle of the roadway roof to achieve effective support and ensure the safe operation of coal mines.

[0004] The temporary support device for coal mine roadways provided by the present invention includes a body, a support frame, and an adjustment assembly. The support frame includes a first sub-frame and a second sub-frame connected to each other. The first sub-frame is connected to the body and is rotatable relative to the body in the width direction of the body. The second sub-frame is rotatable relative to the first sub-frame in the length direction of the body. A guard plate assembly is provided on the second sub-frame. The adjustment assembly includes a first driver. The output end of the first driver is connected to the second sub-frame in a transmission manner. The first driver is used to drive the second sub-frame to rotate relative to the first frame so that the guard plate assembly adapts to the inclination angle of the roadway roof.

[0005] In summary, the temporary support device for coal mine roadways of the present invention, through the coordinated rotation of the first sub-frame and the second sub-frame, enables the protective plate assembly to adapt to the inclination angle of the roadway roof, thereby achieving effective support for such an inclined roof and ensuring the safe operation of coal mines.

[0006] In some embodiments, the first subframe has a first plate, the second subframe has a second plate, the first plate and the second plate are arranged in parallel, a first pivot is provided between the first plate and the second plate, and the first pivot extends along the length direction of the body.

[0007] In some embodiments, a fastener is provided between the first plate and the second plate, the fastener being used to restrict the second subframe from rotating relative to the first subframe.

[0008] In some embodiments, the temporary support device for coal mine roadways further includes a controller, the first drive includes a plurality of adjustable support members, the two ends of the adjustable support members are respectively connected to the support frame and the machine body, the plurality of adjustable support members are respectively disposed on both sides of the machine body along the width direction of the machine body, and the controller is used to adjust the extension length of each of the adjustable support members so that the second sub-frame rotates relative to the first sub-frame.

[0009] In some embodiments, the second subframe includes a first frame and a second frame. A second pivot is provided between the first subframe and the fuselage, and a third pivot is provided between the second frame and the first frame. Both the second pivot and the third pivot extend along the width direction of the fuselage. The two ends of the adjustable support are correspondingly connected to the second frame and the fuselage. A limiting member is provided between the first frame and the second frame to restrict the first frame from rotating relative to the second frame.

[0010] In some embodiments, the support frame further includes a screw and a swivel joint, the screw and the swivel joint being threaded together, one of the screw and the swivel joint being connected to the first subframe, and the other of the screw and the swivel joint being connected to the machine body.

[0011] In some embodiments, the guard plate assembly includes a sliding roof plate that is slidably connected to the second subframe. A second driver is provided between the second subframe and the sliding roof plate. The second driver is used to drive the sliding roof plate to move relative to the second subframe toward the roadway heading direction to form advanced temporary support.

[0012] In some embodiments, the guard plate assembly includes a mounting plate, a ball joint is provided between the mounting plate and the sliding top plate, and an elastic element is provided between the mounting plate and the sliding top plate.

[0013] In some embodiments, the guard plate assembly further includes an outer sleeve, an inner sleeve, and a front guard plate. The outer sleeve is connected to the mounting plate, the inner sleeve is slidably connected to the outer sleeve, and a fourth actuator is provided between the outer sleeve and the inner sleeve. The fourth actuator is used to drive the inner sleeve to slide relative to the outer sleeve. The front guard plate is connected to the inner sleeve to adjust the distance between the front guard plate and the mounting plate.

[0014] In some embodiments, the front guard plate is rotatably connected to the inner sleeve about the width of the body, and a third driver is provided between the front guard plate and the inner sleeve, the third driver being used to drive the front guard plate to rotate relative to the inner sleeve. Attached Figure Description

[0015] Figure 1This is an assembly diagram of a temporary support device for coal mine roadways installed on mining equipment, according to an embodiment of the present invention.

[0016] Figure 2 This is a three-dimensional schematic diagram of a temporary support device for coal mine roadways provided in an embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the support frame in a temporary support device for coal mine roadways provided in an embodiment of the present invention.

[0018] Figure 4 This is a schematic diagram showing the connection between the first subframe and the second subframe in a temporary support device for coal mine roadways provided in an embodiment of the present invention.

[0019] Figure 5 This is a schematic diagram of the connection between the support frame and the adjustable support component in a temporary support device for coal mine roadways provided in an embodiment of the present invention.

[0020] Figure 6 This is a schematic diagram of the connection between the support frame and the support leg in a temporary support device for coal mine roadways provided in an embodiment of the present invention.

[0021] Figure 7 This is a schematic diagram of the structure of the protective plate assembly in a temporary support device for coal mine roadways provided in an embodiment of the present invention.

[0022] Figure 8 This is a schematic diagram of the connection between the mounting plate and the sliding roof plate in a temporary support device for coal mine roadways provided in an embodiment of the present invention.

[0023] Figure label:

[0024] 10. Fuselage; 11. Support legs;

[0025] 21. Support frame; 211. First sub-frame; 2111. First plate; 2112. Rotating hole; 2113. Limiting hole; 212. Second sub-frame; 2121. Second plate; 213. First pivot; 214. Fixing component; 215. First frame body; 216. Second frame body; 217. Second pivot; 218. Third pivot; 219. Limiting component;

[0026] 221. Screw; 222. Screw mount; 223. Connecting arm;

[0027] 23. Adjustment component; 231. First driver; 232. Adjustable support;

[0028] 25. Guard plate assembly; 251. Sliding top plate; 2511. Connecting ball; 252. Second actuator; 253. Mounting plate; 2531. Ball socket; 254. Elastic element; 255. Outer sleeve; 256. Inner sleeve; 257. Front guard plate; 258. Third actuator. Detailed Implementation

[0029] 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.

[0030] like Figures 1 to 8 This invention provides a temporary support device for coal mine roadways, comprising a machine body 10, a support frame 21, and an adjustment assembly 23. The support frame 21 includes a first sub-frame 211 and a second sub-frame 212 connected to each other. The first sub-frame 211 is connected to the machine body 10 and is rotatable relative to the machine body 10 in the width direction. The second sub-frame 212 is rotatable relative to the first sub-frame 211 in the length direction of the machine body 10. A guard plate assembly 25 is provided on the second sub-frame 212. The adjustment assembly 23 includes a first driver 231, the output end of which is connected to the second sub-frame 212 in a transmission manner. The first driver 231 is used to drive the second sub-frame 212 to rotate relative to the first sub-frame 211, so that the guard plate assembly 25 adapts to the inclination angle of the roadway roof.

[0031] Specifically, the support frame 21, through the connected first sub-frame 211 and second sub-frame 212, forms a flexible yet stable support system. The first sub-frame 211 is tightly connected to the machine body 10 and has the function of rotating around the width of the machine body 10, allowing the support frame 21 to make initial angle adjustments according to the specific direction and spatial layout of the tunnel to better fit the tunnel roof. The second sub-frame 212 further enhances the adaptability of the support frame 21. It can rotate relative to the first sub-frame 211 around the length of the machine body 10, forming a two-way rotation mechanism, which greatly improves the flexibility and stability of the support frame 21 in complex tunnel environments. A guard plate assembly 25 is also specially set on the second sub-frame 212. This assembly can not only effectively prevent roof debris from falling and injuring people, but also better adapt to the actual shape of the tunnel roof through adjustments to its shape and position.

[0032] The tilt angle of the tunnel roof is often caused by various factors such as geological conditions and construction techniques during the tunnel excavation process, resulting in tilting or unevenness of the roof in the left and right directions of the tunnel. The output end of the first drive 231 is connected to the second sub-frame 212 through a transmission connection, and the second sub-frame 212 is driven to rotate relative to the first sub-frame 211 through mechanical transmission, so that the guard plate assembly 25 can adapt to the tilt angle of the tunnel roof.

[0033] In summary, the temporary support device for coal mine roadways of the present invention, through the coordinated rotation of the first sub-frame 211 and the second sub-frame 212, enables the guard plate assembly 25 to adapt to the tilt angle of the roadway roof, thereby achieving effective support for such tilted roofs and ensuring the safe operation of coal mines.

[0034] like Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the first subframe 211 has a first plate 2111, and the second subframe 212 has a second plate 2121. The first plate 2111 and the second plate 2121 are arranged in parallel, and a first rotating shaft 213 is provided between the first plate 2111 and the second plate 2121, extending along the length direction of the body 10. That is, the first plate 2111 and the second plate 2121 can be connected through the first rotating shaft 213. Under the driving action of the first driver 231, the second subframe 212 can rotate relative to the first subframe 211 around the first rotating shaft 213. Furthermore, since the first plate 2111 and the second plate 2121 are arranged in parallel in the width direction of the body 10, and the first plate 2111 and the second plate 2121 are in close contact with each other, the rotation direction of the second subframe 212 relative to the first subframe 211 can be restricted, reducing the risk of rotational deviation of the second subframe 212.

[0035] Furthermore, a fixing member 214 is provided between the first plate 2111 and the second plate 2121. The fixing member 214 is used to restrict the rotation of the second subframe 212 relative to the first subframe 211. It should be noted that when the second subframe 212 does not need to rotate relative to the first subframe 211, the fixing member 214 can connect the first plate 2111 and the second plate 2121 together to form a rigid integral structure. When the second subframe 212 needs to rotate relative to the first subframe 211, the operator can temporarily release the connection of the fixing member 214 to one of the first plate 2111 and the second plate 2121, so that the second subframe 212 can rotate relative to the first subframe 211 around the first pivot 213.

[0036] In this embodiment, both the first plate 2111 and the second plate 2121 are provided with a rotating hole 2112 and a limiting hole 2113, and the first rotating shaft 213 passes through the rotating hole 2112. The fixing member 214 is a component such as a connecting pin or bolt. One end of the fixing member 214 is inserted into the limiting hole 2113 of the second plate 2121 through the limiting hole 2113 of the second plate 2121, so as to realize the installation and fixing of the first plate 2111 and the second plate 2121.

[0037] Furthermore, both the first plate 2111 and the second plate 2121 have two corresponding limiting holes 2113. The two limiting holes 2113 on the first plate 2111 are symmetrically arranged on opposite sides of the rotating hole 2112. The limiting holes 2113 on the first plate 2111 correspond to the limiting holes 2113 on the second plate 2121. It is conceivable that the fixing member 214 has two parts, allowing it to be smoothly inserted into the two limiting holes 2113 on the first plate 2111, achieving double limiting.

[0038] like Figure 1 , Figure 2 , Figure 5 As shown, in some embodiments, the temporary support device for coal mine roadways further includes a controller. The first drive 231 includes multiple adjustable support members 232, with each end of the adjustable support member 232 correspondingly connected to the support frame 21 and the machine body 10. The multiple adjustable support members 232 are respectively arranged on both sides of the machine body 10 along the width direction of the machine body 10. The controller is used to adjust the extension length of each adjustable support member 232 so that the second sub-frame 212 rotates relative to the first sub-frame 211.

[0039] Specifically, the support frame 21 has a front end and a rear end. The rear end of the support frame 21 is rotatably connected to the machine body 10, and the front end of the support frame 21 is connected to adjustable support members 232. Multiple adjustable support members 232 are located on opposite sides of the support frame 21. When it is necessary to adjust the inclination angle of the guard plate assembly 25 in the left-right direction of the roadway, the controller can control the adjustable support members 232 on the left and right sides of the support frame 21 to have different extension lengths. Due to the height difference between the adjustable support members 232 on both sides of the support frame 21, the second sub-frame 212 rotates relative to the first sub-frame 211 around the first rotating shaft 213, thereby supporting the roadway roof at different inclination angles.

[0040] Furthermore, during the actual support process, the controller can also control the extension length of the adjustable support members 232 to be consistent or arranged linearly, so that the support frame 21 rotates relative to the machine body 10 around the width direction of the machine body 10, thereby making the protective plate assembly 25 have different heights to adapt to the roadway roof of different heights.

[0041] In other words, the adjustable support 232 can not only enable the second subframe 212 to rotate relative to the first subframe 211 in the length direction of the fuselage 10, but also enable the support frame 21 to rotate relative to the fuselage 10 in the width direction of the fuselage 10, thus having multiple functions.

[0042] like Figure 2 , Figure 6As shown, in some embodiments, the second subframe 212 includes a first frame 215 and a second frame 216. A second pivot 217 is provided between the first subframe 211 and the fuselage 10, and a third pivot 218 is provided between the second frame 216 and the first frame 215. Both the second pivot 217 and the third pivot 218 extend along the width direction of the fuselage 10. The two ends of the adjustable support member 232 are correspondingly connected to the second frame 216 and the fuselage 10. A limiting member 219 is provided between the first frame 215 and the second frame 216. The limiting member 219 is used to restrict the first frame 215 from rotating relative to the second frame 216.

[0043] Specifically, in actual tunnel operations, the height of the tunnel roof is not fixed but fluctuates significantly due to differences in geological structure, mining depth, and coal seam thickness. The first frame 215 and the second frame 216 in the second sub-frame 212 are connected by a third pivot 218, allowing for the selection of appropriate support structures when the tunnel roof height varies.

[0044] For example, when the tunnel roof is low, the limiting member 219 can be released from the restriction on the first frame 215 and the second frame 216. At this time, the controller can adjust the extension length of the adjustable support member 232 so that the second frame 216 rotates relative to the first frame 215 around the third rotating shaft 218. The first frame 215 is fixed or moves relatively little relative to the machine body 10, so that the guard plate assembly 25 on the second frame 216 has a lower height to accurately fit the tunnel roof.

[0045] When the tunnel roof is high, the limiting member 219 can limit the first frame 215 and the second frame 216 to form a rigid whole. At this time, when the controller adjusts the extension length of the adjustable support member 232, the whole formed by the first frame 215 and the second frame 216 will rotate around the second pivot 217, thereby causing the guard plate assembly 25 to fit against the tunnel roof.

[0046] like Figure 2 , Figure 6 As shown, in some embodiments, the support frame 21 further includes a screw 221 and a swivel joint 222, with a threaded connection between the screw 221 and the swivel joint 222. One of the screw 221 and the swivel joint 222 is connected to the first sub-frame 211, and the other of the screw 221 and the swivel joint 222 is connected to the fuselage 10. In actual use, by connecting the position of the swivel joint 222 on the screw 221, the first sub-frame 211 and the second sub-frame 212 can be moved relative to the fuselage 10 along the length of the fuselage 10, thereby causing the guard plate assembly 25 to move towards the frontal direction, thus achieving support for the forward-facing area.

[0047] Furthermore, the first subframe 211 also includes multiple connecting arms 223, which are arranged in parallel to each other. Each connecting arm 223 is provided with a screw seat 222, and the screw 221 can be connected to the machine body 10 through the second rotating shaft 217.

[0048] Furthermore, there are two connecting arms 223. When the positions of the rotating seats 222 on the two connecting arms 223 on the screw 221 are inconsistent, the guard plate assembly 25 will tilt in the left and right directions of the roadway, so that it can cooperate with the first rotating shaft 213 to realize the tilt adjustment of the guard plate assembly 25.

[0049] In this embodiment, the body 10 has a support leg 11, and a second rotating shaft 217 is connected between the support leg 11 and the screw 221 of the first sub-frame 211. The support leg 11 can provide a stable mounting base for the support frame 21.

[0050] like Figure 2 , Figure 7 and Figure 8 As shown, in some embodiments, the protective plate assembly 25 includes a sliding roof plate 251, which is slidably connected to the second subframe 212. A second driver 252 is provided between the second subframe 212 and the sliding roof plate 251. The second driver 252 is used to drive the sliding roof plate 251 to move relative to the second subframe 212 toward the roadway facing direction, so as to form temporary support for the advanced area, provide a safe working environment for the tunneling and mining equipment, and avoid damage to the equipment caused by accidents such as roof collapse and sidewall spalling.

[0051] Furthermore, the guard plate assembly 25 also includes a mounting plate 253, which is connected to the sliding roof plate 251 by a ball joint, and an elastic element 254 is provided between the mounting plate 253 and the sliding roof plate 251. The ball joint refers to the presence of a ball socket 2531 and a connecting ball 2511 on the mounting plate 253 and the sliding roof plate 251, respectively. The connecting ball 2511 can rotate omnidirectionally within the ball socket 2531, giving the mounting plate 253 three degrees of freedom of rotation relative to the sliding roof plate 251. This allows for better adaptation to uneven surfaces and angle changes on the roadway roof, ensuring that other components on the guard plate assembly 25 maintain a suitable working angle at all times.

[0052] The elastic element 254 plays multiple important roles between the mounting plate 253 and the sliding top plate 251. First, the elastic element 254 can act as a buffer and shock absorber. During coal mine tunneling, the equipment is subjected to various vibrations and impacts, such as the tunneling vibration of the tunneling head. At this time, the elastic element 254 can absorb and dissipate these vibrations and impacts through its own elastic deformation, reducing the vibration transmitted to the guard plate assembly 25 and the entire equipment.

[0053] Secondly, the elastic element 254 can provide a certain preload. By adjusting the preload of the elastic element 254, the mounting plate 253 and the sliding top plate 251 can maintain appropriate contact pressure, ensuring that the guard plate assembly 25 will not loosen or shift due to vibration or external force during operation.

[0054] Furthermore, the elastic element 254 also has a certain self-adjusting capability. When the pressure or shape of the roadway top changes, the elastic element 254 can automatically adjust its elastic deformation according to the actual situation, so that the mounting plate 253 and the guard plate assembly 25 can always maintain good contact with the roadway top, improving the adaptability and working effect of the guard plate assembly 25.

[0055] In this embodiment, the mounting plate 253 is provided with a ball socket 2531, and the sliding top plate 251 is provided with a connecting ball 2511. The ball socket 2531 is rotatably disposed in the connecting ball 2511 to realize the ball connection between the mounting plate 253 and the sliding top plate 251.

[0056] like Figure 7 As shown, in some embodiments, the guard plate assembly 25 further includes an outer sleeve 255, an inner sleeve 256, and a front guard plate 257. The outer sleeve 255 is connected to the mounting plate 253, and the inner sleeve 256 is slidably connected to the outer sleeve 255. A fourth actuator is provided between the outer sleeve 255 and the inner sleeve 256. The fourth actuator is used to drive the inner sleeve to slide relative to the outer sleeve. The front guard plate 257 is connected to the inner sleeve 256 to adjust the distance between the front guard plate 257 and the mounting plate 253.

[0057] Furthermore, the front guard plate 257 is rotatably connected to the inner sleeve 256 in the width direction of the body 10, and a third driver 258 is provided between the front guard plate 257 and the inner sleeve 256. The third driver 258 is used to drive the front guard plate 257 to rotate relative to the inner sleeve 256.

[0058] Optionally, the fourth actuator may be configured as a component such as a hydraulic cylinder or a linear motor.

[0059] In this embodiment, one end of the outer sleeve 255 can be connected to the mounting plate 253 by welding, bolting, or other means to ensure that the two will not loosen due to equipment vibration or external forces. The front guard plate 257 can contact the coal mine roadway or extend towards the tunneling face to support the front of the equipment. The third drive 258 can adjust the rotation angle of the front guard plate 257 according to actual operational needs, providing reliable protection for the equipment and operators.

[0060] Through research by the technical personnel of this invention, it has been discovered that this invention can achieve forward-probing temporary support by coordinating the sliding top plate 251, the outer sleeve 255 and the inner sleeve 256, and the screw 221 and the swivel joint 222. This achieves zero open roof in advance temporary support and provides an initial support force of 2×200kN, effectively ensuring the safety of workers and equipment. It solves the problem that the temporary support available on the market (which can only provide an initial support force of 50kN) cannot truly cope with large-scale roof collapses.

[0061] like Figure 1 , Figure 2 As shown, in this embodiment, two guard plate assemblies 25 are provided, and the two guard plate assemblies 25 are spaced apart from the sliding roof plate 251 in the width direction of the machine body 10. In practical applications, the two guard plate assemblies 25 can support the roof plates on both sides of the roadway respectively, forming a comprehensive support system. For example, when the roadway is wide, a single guard plate assembly 25 may not be able to completely cover the entire roof plate, while the double guard plate assembly 25 can achieve comprehensive support for the roadway roof plate by reasonably adjusting the spacing and angle, effectively preventing local roof collapse.

[0062] Meanwhile, the two guard plate assemblies 25 can be adjusted independently according to the uneven stress on the roadway roof. When the roof pressure on one side of the roadway is greater, the guard plate assembly 25 on that side can adjust the rotation angle of the front guard plate 257 through the third actuator 258 to increase the support force; while the guard plate assembly 25 on the other side can be adjusted accordingly according to the actual situation to ensure the stability and reliability of the entire support system.

[0063] It should be noted that the second and third drives can be hydraulic cylinders, electric cylinders (trapezoidal screws, ball screws), or linear motors, etc.

[0064] 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," "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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] In this invention, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are 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.

[0069] 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 temporary support device for coal mine roadways, characterized in that, The system includes a body (10), a support frame (21), and an adjustment assembly (23). The support frame (21) includes a first sub-frame (211) and a second sub-frame (212) connected to each other. The first sub-frame (211) is connected to the body (10) and is rotatable relative to the body (10) about the width of the body (10). The second sub-frame (212) is rotatable relative to the first sub-frame (211) about the length of the body (10). The second sub-frame (212) is provided with a guard plate assembly (25). The adjustment assembly (23) includes a first driver (231). The output end of the first driver (231) is connected to the second sub-frame (212) in a transmission connection. The first driver (231) is used to drive the second sub-frame (212) to rotate relative to the first sub-frame (211) so that the guard plate assembly (25) adapts to the tilt angle of the tunnel roof. The first subframe (211) has a first plate (2111), and the second subframe (212) has a second plate (2121). The first plate (2111) and the second plate (2121) are arranged in parallel. A first rotating shaft (213) is provided between the first plate (2111) and the second plate (2121). The first rotating shaft (213) extends along the length direction of the body (10).

2. The temporary support device for coal mine roadways according to claim 1, characterized in that, A fastener (214) is provided between the first plate (2111) and the second plate (2121), the fastener (214) being used to restrict the second sub-frame (212) from rotating relative to the first sub-frame (211).

3. The temporary support device for coal mine roadways according to claim 1, characterized in that, The temporary support device for coal mine roadways also includes a controller. The first driver (231) includes multiple adjustable support members (232). The two ends of the adjustable support members (232) are connected to the support frame (21) and the machine body (10) respectively. The multiple adjustable support members (232) are respectively arranged on both sides of the machine body (10) along the width direction of the machine body (10). The controller is used to adjust the extension length of each adjustable support member (232) so that the second sub-frame (212) rotates relative to the first sub-frame (211).

4. The temporary support device for coal mine roadways according to claim 3, characterized in that, The second subframe (212) includes a first frame (215) and a second frame (216). A second pivot (217) is provided between the first subframe (211) and the fuselage (10). A third pivot (218) is provided between the second frame (216) and the first frame (215). Both the second pivot (217) and the third pivot (218) extend along the width direction of the fuselage (10). The two ends of the adjustable support (232) are connected to the second frame (216) and the fuselage (10). A limiting member (219) is provided between the first frame (215) and the second frame (216). The limiting member (219) is used to restrict the first frame (215) from rotating relative to the second frame (216).

5. The temporary support device for coal mine roadways according to claim 1, characterized in that, The support frame (21) also includes a screw (221) and a screw seat (222), the screw (221) and the screw seat (222) are connected by a thread, one of the screw (221) and the screw seat (222) is connected to the first sub-frame (211), and the other of the screw (221) and the screw seat (222) is connected to the body (10).

6. The temporary support device for coal mine roadways according to claim 1, characterized in that, The guard plate assembly (25) includes a sliding top plate (251), which is slidably connected to the second subframe (212). A second driver (252) is provided between the second subframe (212) and the sliding top plate (251). The second driver (252) is used to drive the sliding top plate (251) to move relative to the second subframe (212) toward the roadway facing direction to form advanced temporary support.

7. The temporary support device for coal mine roadways according to claim 6, characterized in that, The guard plate assembly (25) includes a mounting plate (253), the mounting plate (253) and the sliding top plate (251) are connected by a ball joint, and an elastic element (254) is provided between the mounting plate (253) and the sliding top plate (251).

8. The temporary support device for coal mine roadways according to claim 7, characterized in that, The guard plate assembly (25) further includes an outer sleeve (255), an inner sleeve (256), and a front guard plate (257). The outer sleeve (255) is connected to the mounting plate (253), and the inner sleeve (256) is slidably connected to the outer sleeve (255). A fourth actuator is provided between the outer sleeve (255) and the inner sleeve (256). The fourth actuator is used to drive the inner sleeve (256) to slide relative to the outer sleeve (255). The front guard plate (257) is connected to the inner sleeve (256) to adjust the distance between the front guard plate (257) and the mounting plate (253).

9. The temporary support device for coal mine roadways according to claim 8, characterized in that, The front guard plate (257) is rotatably connected to the inner sleeve (256) about the width of the body (10). A third driver (258) is provided between the front guard plate (257) and the inner sleeve (256). The third driver (258) is used to drive the front guard plate (257) to rotate relative to the inner sleeve (256).

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