A lifting type supporting device for underground coal mine

Abstract

The present application relates to coal mine supporting technical field, specifically to a kind of lifting type supporting device for underground coal mine, including base, support column, mobile jack, hydraulic controller, protective beam, roof beam plate, support assembly, connecting assembly, moving assembly and contact zone;Support assembly extends outside roof beam plate in initial state, when supporting device needs to move forward, the support column is relieved, after the base and roof beam plate slide forward a standard step, the support column is raised and supported, the connecting assembly is disconnected, support assembly returns to inside roof beam plate, after moving assembly pushes support assembly forward a standard step, support assembly extends outside roof beam plate, and connecting assembly is connected with the connecting assembly of two side supporting devices, solve the problem that when the rock layer above is too loose, when hydraulic support removes support, the loose rock on top can not wait for the "stress arch" of adjacent frame to form completely, and instantaneously collapse.

Description

Technical Field

[0001] This invention relates to the field of coal mine support technology, specifically to a lifting support device for underground coal mines. Background Technology

[0002] Coal mine support equipment is mainly divided into temporary support equipment and semi-permanent support. Semi-permanent support equipment is mainly used to build return airway and transport roadway in coal mines, which are then used for coal transportation and underground ventilation. Temporary support equipment is used to create temporary mining space during coal mining. After the coal mine is mined, this space will be buried along with the movement of the temporary support equipment.

[0003] In existing technologies, hydraulic supports are mainly used for temporary support. During coal mining, multiple hydraulic supports are arranged side by side and supported by a top beam to support the upper space. The front end of the hydraulic support is connected to the scraper conveyor via a push jack. The coal mining machine is installed on top of the scraper conveyor. The coal mining machine will mine the coal in front of the hydraulic support and drop it onto the scraper conveyor. When one round of coal mining is completed, the hydraulic support will be pushed forward by the push jack by a standard step distance so that it is in the newly mined space. At this time, the hydraulic support will lower the column to release pressure. Since the hydraulic support no longer supports the upper rock, the push jack will retract, and the push jack will pull the hydraulic support forward by a standard step distance. At this time, the hydraulic support will rise to support the upper space again, thus completing one round of work.

[0004] However, during the aforementioned process, as the hydraulic support moves forward, it needs to lower its column to release pressure, at which point it loses its supporting force on the space above. Although existing technologies use side guard plates on the left and right sides of the hydraulic support and extend forward beams at the front of the hydraulic support on both sides to assist in supporting the hydraulic support and form a "stress arch" to help support the space above, if the rock strata above are too loose, when the hydraulic support is removed, the loose rock above it may collapse instantly before the "stress arch" of the adjacent support is fully formed. Even if the forward beams of the adjacent support provide pre-support, they may not be effective due to the small contact area, and there is still a risk of collapse. In this case, the existing solutions are mostly to insert anchor bolts into the space above for reinforcement or to fill it with concrete for reinforcement. However, this method is cumbersome, inefficient, greatly affects the coal mining progress, and is also dangerous.

[0005] Therefore, a lifting support device for underground coal mines is proposed. Summary of the Invention

[0006] This invention provides a lifting support device for underground coal mines. In its initial state, the support component extends beyond the top beam plate and connects to the support components of the two side support devices via a connecting component. When the support device needs to move forward, the support column depressurizes, the base and top beam plate slide forward one standard step, and the support column rises to support the structure. The connecting component disconnects, and the support component returns to the inside of the top beam plate. The moving component then pushes the support component forward one standard step, after which the support component extends beyond the top beam plate, and the connecting component connects to the connecting components of the two side support devices. This solves the problem that when the upper rock strata are too loose, the loose rock above the hydraulic support may collapse instantly before the "stress arch" of the adjacent support can fully form when the hydraulic support is removed, especially if the rock strata above are too loose.

[0007] To achieve the above-mentioned technical objectives, the present invention provides the following technical solution:

[0008] A lifting support device for underground coal mines includes a base, a support column, a movable jack, a hydraulic controller, a protective beam, a top beam plate, a support assembly, a connecting assembly, a moving assembly, and contact belts. The top beam plate is installed on the upper end of the support column, the support assembly is installed inside the top beam plate, the connecting assembly is installed on both sides of the support assembly, and the moving assembly is installed on both sides of the support assembly. Two contact belts are respectively wrapped around the outer periphery of the top beam plate. In the initial state, the support assembly extends outward from the top beam plate, and the connecting assembly is connected to the connecting assemblies of the two side support devices. When the support device needs to move forward, the support column is depressurized, the base and the top beam plate slide forward one standard step, and then the support column rises to support it. The connecting assembly disconnects, the support assembly returns to the inside of the top beam plate, and the moving assembly pushes the support assembly forward one standard step, after which the support assembly extends outward from the top beam plate, and the connecting assembly connects to the connecting assemblies of the two side support devices.

[0009] In the above scheme, during operation, the support components of multiple support devices are connected by connecting components to form a continuous support network at the upper end of the mining area. This firmly supports the upper crushed rock, preventing excessive pressure on the upper part of the support device and thus avoiding damage. Simultaneously, when the support device needs to move forward a step distance with the mining progress, the support devices on both sides can be used to support the support components. This avoids the formation of a gap during the movement of the support device, thus preventing the risk of loose rock collapsing. Furthermore, by setting a contact strip, this invention increases the contact area with the upper rock, thereby reducing local pressure on the support device. Compared to the prior art using a top beam plate to support the upper rock, this avoids the risk of unevenness or even damage to the support device due to excessive local pressure from the rock. The contact strip also prevents relative friction between the rock and the top beam plate, thus extending the service life of the top beam plate.

[0010] The support assembly includes a support frame, a lifting column, a support side frame, and support rods. The top beam plate has an installation groove inside, the support frame is installed in the installation groove, the lifting column is installed inside the support frame, the support side frame is installed at both ends of the support frame, and multiple support rods are installed on the outside of the support side frame.

[0011] Multiple fixing rods are installed on the surface of the top beam plate. The diameter of the fixing rods is the same as that of the support rods, and the height of the fixing rods is slightly lower than that of the support rods in the initial state.

[0012] The connecting assembly includes a connecting port, a connecting rod, and a conical locking pin. The connecting port is located inside the right support rod, the connecting rod is installed inside the left support rod, and the conical locking pin is installed at the end of the connecting rod. The cross-section of the connecting port is "V" shaped, and the inner wall of the V-shaped opening is perfectly matched with the conical angle of the conical locking pin. A locking hole matching the conical locking pin is provided inside the connecting port.

[0013] This invention connects the support components of adjacent support equipment by setting a connecting port, a connecting rod, and a conical locking pin, forming a whole that can withstand greater pressure. When the support equipment as a whole needs to be moved, the connecting components can support the support equipment at both ends, so that the support equipment only needs to overcome the friction between itself and the lower end when moving, and there will be no gap. At the same time, setting the cross-section of the connecting port to V-shape can prevent the connecting port and the connecting rod from misaligning due to the heavy pressure of the gangue at the upper end.

[0014] The movable component includes a telescopic rod and a slider. The support frame has grooves on both sides, the slider is installed in the grooves, the support side frame is installed on the surface of the slider, the telescopic rod is installed inside the top beam plate, and the telescopic end of the telescopic rod is connected to the slider.

[0015] This invention, by setting up telescopic rods and sliders, allows the support side frame to be pushed forward by moving components when the support assembly retracts to the inside of the top beam plate. Thus, when the support frame moves upward, the entire process is completed, facilitating the next movement.

[0016] The contact strip includes a contact plate, a hinge rod, and a pressure-relieving pad. The lower end of the contact plate has a fixing groove, the curvature of which matches the support rod. The contact plate is in contact with the support rod. The hinge rod is hinged between adjacent contact plates. The pressure-relieving pad is installed on the outside of the contact plate. The distance between adjacent fixing grooves is equal to the horizontal distance between the support rod and the fixing rod.

[0017] A forward extension beam is installed at the front end of the top beam plate. The forward extension beam includes a forward extension rod and a pivot. The forward extension rod is fixedly installed at the front end of the top beam plate. The pivot is installed between two forward extension rods. The diameter of the pivot is the same as that of the support rod and the surface of the pivot mates with the contact plate. The forward extension length of the forward extension rod is an integer multiple of the length of the contact plate.

[0018] An adjustment frame is installed at the lower end of the protective beam. The adjustment frame includes an adjustment rod and an adjustment shaft. The adjustment rod is installed at the lower end of the protective beam, and the adjustment shaft is installed between two adjustment rods. A disc spring is installed inside the adjustment rod. The diameter of the adjustment shaft is the same as that of the rotating shaft, and the surface of the adjustment shaft mates with the fixing groove.

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

[0020] 1. Compared with existing technologies, traditional hydraulic supports must perform a "column lowering and pressure relief" operation when moving, causing their top beams to temporarily detach from the roof, creating an unsupported "empty roof period." Although the forward beams and side guards of adjacent supports can form a certain "stress arch," under harsh geological conditions with loose and fractured roof strata, this indirect and limited support often cannot bear the load in time, easily leading to roof collapse accidents. This invention innovatively changes the support mode by setting support components that can be connected to adjacent devices: when a single support device needs to move forward, its own support column is depressurized, but the support components above it remain firmly connected to the adjacent supports on the left and right through connecting components, with the adjacent supports jointly bearing the roof pressure. This is equivalent to seamlessly "transferring" the roof support responsibility to adjacent equipment during the support movement process, ensuring that there is direct and effective mechanical support acting on the roof from beginning to end. This design completely solves the inherent defects of the "empty roof period," especially under conditions of soft and fractured roofs, its safety advantages far exceed those of existing technologies.

[0021] 2. In existing technologies, the top beam of a hydraulic support directly contacts the roof rock, resulting in a relatively limited contact area and stress concentration, leading to excessive local pressure. This not only easily damages loose roof surfaces, causing spalling and collapse, but also causes severe relative friction and scraping between the top beam and the uneven roof surface during the movement of the support device, severely wearing down the top beam and shortening its service life. This invention, by setting a flexible contact strip above the top beam plate, consisting of a hinged contact plate and a pressure-relieving pad, offers two advantages: First, the contact strip significantly increases the contact area with the roof plate, evenly distributing the enormous supporting force, reducing local pressure, and providing a "surface" support effect, better maintaining the stability of the roof. Second, during the movement of the device, it is the relatively inexpensive and easily replaceable contact strip that slides against the roof plate, while the top beam plate, as the core load-bearing structural component, is completely protected, avoiding direct wear. This significantly extends the service life of the entire support equipment and reduces maintenance costs.

[0022] 3. In actual downhole operations, uneven pressure distribution on the roof or unevenness of the floor makes it difficult to perfectly align the support components of adjacent support devices in terms of height. This places extremely high demands on the reliability of the connection mechanism. Existing technologies using simple pin connections are prone to connection failure even with slight misalignment. The connection component designed in this invention cleverly employs a matching structure of a "V"-shaped connection port and a conical locking pin. When the connecting rod extends towards the connection port, even with a certain height deviation, the conical head will automatically slide and center along the V-shaped slope, ultimately precisely entering the locking hole and being locked by the locking pin. This self-guiding and fault-tolerant design greatly simplifies the docking operation and ensures rapid and reliable locking even under harsh conditions such as heavy pressure and misalignment. This not only ensures the stable realization of the core "cooperative support" function of this invention but also significantly improves the equipment's adaptability to complex environments and operational efficiency, which is unparalleled by existing connection methods. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] The above and other aspects of the invention will now be described by way of example only, with reference to the accompanying drawings, in which:

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a front view of the present invention;

[0027] Figure 3 This is the present invention. Figure 2 Sectional view of section AA;

[0028] Figure 4 This is a schematic diagram of the internal structure of the top beam plate of the present invention;

[0029] Figure 5 This is the present invention. Figure 4 Enlarged view of section A in the middle;

[0030] Figure 6 This is a schematic diagram of the overall structure of the top beam plate of the present invention;

[0031] Figure 7 This is the present invention. Figure 6 Enlarged view of section B;

[0032] Figure 8This is a structural diagram of the contact component of the present invention.

[0033] In the picture:

[0034] 1. Base;

[0035] 2. Support columns;

[0036] 3. Move the jack;

[0037] 4. Hydraulic controller;

[0038] 5. Protective beams;

[0039] 6. Top beam plate; 61. Mounting groove; 62. Fixing rod;

[0040] 7. Support components; 71. Support frame; 711. Slide groove; 72. Lifting column; 73. Support side frame; 74. Support rod;

[0041] 8. Connecting component; 81. Connecting port; 811. Locking hole; 82. Connecting rod; 83. Conical locking pin;

[0042] 9. Moving component; 91. Telescopic rod; 92. Slider;

[0043] 10. Contact strip; 101. Contact plate; 1011. Fixing groove; 102. Hinge rod; 103. Pressure relief pad;

[0044] 11. Extension beam; 111. Extension rod; 112. Pivot;

[0045] 12. Adjusting frame; 121. Adjusting rod; 122. Adjusting shaft. Detailed Implementation

[0046] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0047] like Figures 1 to 8As shown, the system includes a base 1, a support column 2, a movable jack 3, a hydraulic controller 4, a protective beam 5, a top beam plate 6, a support assembly 7, a connecting assembly 8, a moving assembly 9, and contact belts 10. The top beam plate 6 is installed on the upper end of the support column 2, the support assembly 7 is installed inside the top beam plate 6, the connecting assembly 8 is installed on both sides of the support assembly 7, and the moving assembly 9 is installed on both sides of the support assembly 7. The two contact belts 10 are respectively wrapped around the outer periphery of the top beam plate 6. In the initial state, the support assembly 7 extends outward from the top beam plate 6, and the connecting assembly 8 is connected to the connecting assembly 8 of the two side support devices. When the support devices need to move forward, the support column 2 is depressurized, the base 1 and the top beam plate 6 slide forward one standard step, the support column 2 rises to support, the connecting assembly 8 disconnects, the support assembly 7 returns to the inside of the top beam plate 6, and the moving assembly 9 pushes the support assembly 7 forward one standard step, after which the support assembly 7 extends outward from the top beam plate 6, and the connecting assembly 8 is connected to the connecting assembly 8 of the two side support devices.

[0048] In operation, the support components 7 of multiple support devices are connected by connecting components 8 to form a continuous support network at the upper end of the mining area, thereby firmly supporting the upper crushed stone and preventing excessive pressure on the upper part of the support equipment at any point, which could damage the support equipment. At the same time, when the support equipment needs to move forward a step distance with the mining progress, the support components 7 can be supported by the support equipment on both sides, thereby avoiding the occurrence of a gap in the roof during the movement of the support equipment and thus avoiding the risk of loose gangue collapsing. In addition, by setting the contact strip 10, the present invention increases the contact area with the gangue above, thereby reducing the local pressure on the support equipment. Compared with the prior art of using the top beam plate 6 to support the gangue above, it can avoid the risk of uneven surface or even damage caused by excessive local pressure from the gangue on the support equipment. At the same time, the contact strip 10 can prevent relative friction between the gangue and the top beam plate 6, thereby extending the service life of the top beam plate 6.

[0049] As a specific embodiment of the present invention, refer to Figure 3The support assembly 7 includes a support frame 71, a lifting column 72, a support side frame 73, and a support rod 74. The support frame 71 is divided into upper and lower parts, connected in the middle by the lifting column 72. The lifting column 72 is a telescopic hydraulic cylinder, controlled by a hydraulic controller 4 for its extension and retraction. The top beam plate 6 is hollow inside, with an "I"-shaped opening at the upper end for the lifting and lowering of the support frame 71. The middle position of the opening is tightly fitted to the support frame 71. The outer side of the protruding part is covered with an elastic telescopic cover for dust prevention and to prevent gangue from falling into the top beam plate 6. The bottom of the top beam plate 6 has an installation groove 61, and the lower half of the support frame 71 is installed in the installation groove 61. The support side frame 73 is slidably installed on the support frame 71. On both the left and right sides, multiple support rods 74 are fixedly installed on the outside of the support side frame 73. Multiple fixing rods 62 are installed on the upper surface of the top beam plate 6. The fixing rods 62 are solid cylinders with the same diameter as the support rods 74. Initially, the height of the fixing rods 62 is lower than that of the support rods 74. When the lifting column 72 pushes the support frame 71 to rise, the support rods 74 come into contact with the contact strip 10, jointly supporting the upper gangue. Simultaneously, they are connected to the support rods 74 of the left and right support equipment via the connecting assembly 8, forming a protective net to distribute the pressure of the upper gangue, thereby enhancing its bearing capacity. When the entire support equipment needs to move forward a step, it can be moved forward via the lower... The support column 2 is depressurized, but the support rod 74 continues to be connected to the adjacent support rod 74 via the connecting component 8, temporarily supporting the upper gangue using the support rod 74. At this time, the lower support equipment, the top beam plate 6, and the support frame 71 slide forward one standard step (by moving the support equipment forward using the moving jack 3, which is existing technology and will not be elaborated further here), while the support side frame 73 and the support rod 74 remain in their original positions. After the support equipment has moved, the support column 2 is pressurized again to support the upper top beam plate 6 and the support frame 71. At this time, the lifting column 72 is depressurized and lowered, the connecting component 8 is disconnected, and the entire support frame 71, support side frame 73, and support rod 74... Returning to the top beam plate 6, the contact strip 10 connects to the fixed rod 62, and the support column 2 rises slightly to jointly support the upper gangue. The support side frame 73 and the support rod 74 slide forward one step under the push of the moving component 9. At this time, the lifting column 72 rises, and the support rod 74 resumes support for the upper gangue. Meanwhile, it continues to connect with the support rods 74 on the left and right sides through the connecting component 8. In this way, the support equipment continues to support the upper gangue when it moves, and the movement resistance of the support equipment will not increase due to the pressure of the upper gangue. At the same time, it increases the overall support capacity of the support equipment during normal operation and improves safety.

[0050] As a specific embodiment of the present invention, refer to Figures 5 to 7The connecting assembly 8 includes a connecting port 81, a connecting rod 82, and a conical locking pin 83. The connecting port 81 is opened inside the left support rod 74, and the connecting rod 82 is installed inside the right support rod 74. The connecting rod 82 is a miniature double-acting hydraulic cylinder, the cylinder body of which is fixed inside the support rod 74, and the piston rod end is connected to the conical locking pin 83. The inlet and outlet of the hydraulic cylinder are connected to the hydraulic controller 4 via oil passages built into the support rod 74 and the support side frame 73. The conical locking pin 83 is installed at the end of the connecting rod 82. A spring is installed inside the locking pin, and both ends of the outer side are arc-shaped. The tension of the connecting rod 82 can pull it out and compress the spring. The cross-section of the connecting port 81 is "V"-shaped, and the inner wall of the V-shaped port is perfectly matched with the conical surface angle of the conical locking pin 83. The connecting port 81 has a locking hole 811 that matches the conical locking pin 83. When the support rod 74 needs to be connected to an adjacent support rod 74, the hydraulic controller 4 will control the connecting rod 82 to extend. At this time, because the cross-section of the connecting port 81 is "V"-shaped, and the inner wall of the V-shaped port is perfectly matched with the conical surface angle of the conical locking pin 83... Even though the vertical height of each connecting rod 82 may be inconsistent due to different pressure from the upper gangue, the V-shaped opening design can still make them match each other until they overlap. When the connecting rod 82 extends into the connecting port 81, the locking pin of the front cone locking pin 83 pops out and cooperates with the locking hole 811, thereby locking the adjacent support rod 74. When the support rod 74 needs to be disconnected, simply pull back the connecting rod 82, and the arc surface of the locking pin compresses the spring, unlocking it and pulling it out. In this way, the adjacent support rods 74 can be firmly fixed together, so that they can share the pressure of the upper gangue. At the same time, the V-shaped opening design allows for a certain deviation in the position of the connecting rod 82 under heavy pressure, enhancing the fault tolerance of the support equipment.

[0051] As a specific embodiment of the present invention, refer to Figure 3 , Figure 4The movable component 9 includes a telescopic rod 91 and a slider 92. The support frame 71 has grooves 711 on both sides of its surface, with a certain depth to prevent damage from the heavy pressure of the overhead rock. The slider 92 is installed within the grooves 711 and is made of high-strength alloy, making it resistant to deformation under heavy pressure. The support side frame 73 is welded to the surface of the slider 92. The telescopic rod 91 is installed inside the top beam plate 6 and is a double-acting hydraulic cylinder. Its rear end is hinged to a reinforcing rib inside the top beam plate 6, and its piston rod front end is hinged to the slider 92. The slider 92 can slide within the grooves 711 formed on the side wall of the support frame 71. The support frame 73 is fixed on the slider 92. The telescopic end of the telescopic rod 91 is connected to the slider 92. The slider 92 is also slidably connected to the telescopic rod 91. The telescopic rod 91 does not move with the support frame 71. When the support frame 71 retracts into the top beam plate 6, the telescopic rod 91 extends and the slider 92 moves forward one step. At this time, the support frame 71 moves upward, so that the support rod 74 supports the gangue above again, thereby realizing the movement of the entire support equipment and preparing for the next cycle.

[0052] As a specific embodiment of the present invention, refer to Figure 8 The contact strip 10 includes a contact plate 101, a hinge rod 102, and a pressure-relieving pad 103. The contact plate 101 is made of high-strength alloy and has a fixing groove 1011 at its lower end. The curvature of the fixing groove 1011 matches that of the support rod 74. In the working state, the fixing groove 1011 is in contact with the support rod 74. The hinge rod 102 is hinged between adjacent contact plates 101. The pressure-relieving pad 103 is installed on the outside of the contact plate 101 and is made of flexible material for use in... By increasing the contact area with the upper gangue and reducing the pressure, the spacing between adjacent fixing grooves 1011 is equal to the horizontal spacing between the support rod 74 and the fixing rod 62, so that the contact strip 10 is always in contact with the support rod 74 or the fixing rod 62, avoiding the phenomenon of the contact strip 10 falling off. By setting the contact strip 10, the contact area with the upper gangue can be increased and the pressure reduced, while avoiding friction between the support equipment and the upper gangue during the movement of the support equipment, thereby extending the service life of the support equipment.

[0053] As a specific embodiment of the present invention, refer to Figures 3 to 7A forward extension beam 11 is installed at the front end of the top beam plate 6. The forward extension beam 11 includes a forward extension rod 111 and a rotating shaft 112. The forward extension rod 111 is fixedly installed at the front end of the top beam plate 6 and is also driven by the hydraulic controller 4. The rotating shaft 112 is installed between the two forward extension rods 111. The diameter of the rotating shaft 112 is the same as that of the support rod 74 and the surface of the rotating shaft 112 is in contact with the contact plate 101. Whenever the coal mining machine has mined a certain distance, the forward extension rod 111 can extend forward a corresponding distance in advance to provide pre-support for the coal mine ahead, so as to avoid the situation where the coal mining machine has just passed by and the coal mining progress is affected.

[0054] As a specific embodiment of the present invention, refer to Figures 3 to 7 An adjusting frame 12 is installed at the lower end of the protective beam 5. The adjusting frame 12 is installed at the lower end of the top beam plate 6. The adjusting frame 12 includes an adjusting rod 121 and an adjusting shaft 122. The adjusting rod 121 is installed at the lower end of the protective beam 5, and the adjusting shaft 122 is installed between the two adjusting rods 121. The adjusting rod 121 is a spring-loaded push rod with an internal disc spring that always tends to extend outward. The adjusting shaft 122 is installed at the front end of the adjusting rod 121. When the support assembly 7 retracts and the contact strip 10 falls and rests on the fixed rod 62, a section of it will contact and press down on the adjusting shaft 122. The adjusting shaft 122 moves downward, using the spring force to eliminate its slack, thereby maintaining it at a moderate tension. The diameter of the adjusting shaft 122 is the same as that of the rotating shaft 112. The surface of the adjusting shaft 122 is in sync with the fixing groove 1011. When the support rod 74 retracts, the contact strip 10 falls onto the fixing rod 62. Due to the height difference, the contact strip 10 will inevitably become loose. By setting the adjusting frame 12, the contact strip 10 can be kept taut at all times, further preventing the contact strip 10 from falling off.

[0055] Working process: The support components 7 of multiple support devices are connected by the connecting components 8 to form a complete support net at the upper end of the mining area, thereby firmly supporting the upper crushed stone. At the same time, when the support equipment needs to move forward one step distance with the progress of mining, the support equipment on both sides can be used to support the support component 7. At this time, the other parts of the support equipment move forward one step distance first. After the other parts have moved, the support column 2 rises and supports the upper gangue through the top beam plate 6. The connecting components 8 disconnect, and the support component 7 returns to the inside of the top beam plate 6. At this time, the moving component 9 pushes the support component 7 forward one step distance. Then the support component 7 rises and supports the upper gangue again.

[0056] Specifically, when the lifting column 72 pushes the support frame 71 to rise, the support rod 74 fits against the contact strip 10, jointly supporting the upper gangue. Simultaneously, when the connecting rod 82 extends into the connecting port 81, the locking pin of the cone-shaped locking pin 83 at the front end pops out and engages with the locking hole 811, thereby locking the adjacent support rod 74 and connecting it to the support rods 74 of the left and right support equipment. In this way, a protective net can be formed to distribute the pressure of the upper gangue, thus enhancing its pressure-bearing capacity. When the entire support equipment needs to move forward one step, pressure can be released through the lower support column 2, but the support rod 74 continues to be connected to the adjacent support rod 74 through the connecting component 8, temporarily supporting the upper gangue. At this time, the lower support equipment, the top beam plate 6, and the support frame 71 slide forward one standard step, while the support side frame 7... 3. The support rod 74 stops in its original position. After the support equipment is moved, the support column 2 is repressurized to support the top beam plate 6 and the support frame 71. At this time, the lifting column 72 is depressurized and lowered, and the connecting rod 82 is pulled back. The arc surface of the locking pin compresses the spring, unlocking it. The entire support frame 71, the support side frame 73, and the support rod 74 return to the top beam plate 6. At this time, the contact belt 10 is connected to the fixed rod 62. At the same time, the support column 2 rises slightly to support the gangue above. The telescopic rod 91 extends, and the slider 92 moves forward one step. The support side frame 73 and the support rod 74 slide forward one step under the push of the telescopic rod 91. At this time, the lifting column 72 rises, and the support rod 74 supports the gangue above again. At the same time, it continues to be connected to the support rods 74 on the left and right sides through the connecting component 8 to support the gangue above again.

[0057] 1. The technical features disclosed above are not limited to the combination of the disclosed features with other features. Those skilled in the art can also make other combinations of the technical features according to the purpose of the disclosure in order to achieve the purpose of this disclosure.

[0058] 2. The description herein is provided to enable those skilled in the art to implement or use the present disclosure. Various modifications to the present disclosure will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other variations without departing from the scope of the disclosure. Therefore, this disclosure is not limited to the examples and designs described herein, but should be given the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lifting support device for underground coal mines, comprising a base (1), a support column (2), a movable jack (3), a hydraulic controller (4), and a protective beam (5), characterized in that... It also includes a top beam plate (6), a support assembly (7), a connecting assembly (8), a moving assembly (9), and contact strips (10); the top beam plate (6) is installed on the upper end of the support column (2), the support assembly (7) is installed inside the top beam plate (6), the connecting assembly (8) is installed on both sides of the support assembly (7), and the moving assembly (9) is installed on both sides of the support assembly (7); the two contact strips (10) are respectively wrapped around the outer periphery of the top beam plate (6), and in the initial state, the support assembly (7) extends out of the outside of the top beam plate (6), and the connecting assembly (8) is connected to the connecting assembly (8) of the two side support devices; The support assembly (7) includes a support frame (71), a lifting column (72), a support side frame (73), and support rods (74). The top beam plate (6) has an installation groove (61) inside. The support frame (71) is divided into upper and lower parts, which are connected in the middle by the lifting column (72). The lower part of the support frame (71) is installed in the installation groove (61). The top beam plate (6) is hollow inside, and an "I"-shaped opening is opened at the top for the lifting of the support frame (71). The middle position of the opening is closely fitted with the support frame (71). The support side frame (73) is slidably installed on the left and right sides of the support frame (71). Multiple support rods (74) are installed on the outside of the support side frame (73). The top beam plate (6) is equipped with a plurality of fixing rods (62), the diameter of the fixing rods (62) is the same as that of the support rods (74), and in the initial state the height of the fixing rods (62) is lower than that of the support rods (74), and the support rods (74) are in contact with the contact strip (10); The connecting assembly (8) includes a connecting port (81), a connecting rod (82), and a conical locking pin (83). The connecting port (81) is opened inside the left support rod (74), the connecting rod (82) is installed inside the right support rod (74), and the conical locking pin (83) is installed at the end of the connecting rod (82). The cross-section of the connecting port (81) is "V" shaped, and the inner wall of the V-shaped opening is perfectly matched with the conical angle of the conical locking pin (83). The connecting port (81) is provided with a locking hole (811) that matches the conical locking pin (83). The moving component (9) includes a telescopic rod (91) and a slider (92). The support frame (71) has grooves (711) on both sides. The slider (92) is installed in the grooves (711). The support side frame (73) is installed on the surface of the slider (92). The telescopic rod (91) is installed on one side of the support frame (71). The telescopic end of the telescopic rod (91) is connected to the slider (92).

2. The lifting support device for underground coal mines according to claim 1, characterized in that: The contact strip (10) includes a contact plate (101), a hinge rod (102), and a pressure-relieving pad (103). The lower end of the contact plate (101) is provided with a fixing groove (1011). The curvature of the fixing groove (1011) matches that of the support rod (74). The contact plate (101) is in contact with the support rod (74). The hinge rod (102) is hinged between adjacent contact plates (101). The pressure-relieving pad (103) is installed on the outside of the contact plate (101). The distance between adjacent fixing grooves (1011) is equal to the horizontal distance between the support rod (74) and the fixing rod (62).

3. A lifting support device for underground coal mines according to claim 2, characterized in that: A front extension beam (11) is installed at the front end of the top beam plate (6). The front extension beam (11) includes a front extension rod (111) and a rotating shaft (112). The front extension rod (111) is fixedly installed at the front end of the top beam plate (6). The rotating shaft (112) is installed between two front extension rods (111). The diameter of the rotating shaft (112) is the same as that of the support rod (74), and the surface of the rotating shaft (112) is in contact with the contact plate (101).

4. A lifting support device for underground coal mines according to claim 3, characterized in that: An adjustment frame (12) is installed at the lower end of the top beam plate (6). The adjustment frame (12) includes an adjustment rod (121) and an adjustment shaft (122). The adjustment rod (121) is installed at the lower end of the top beam plate (6), and the adjustment shaft (122) is installed between the two adjustment rods (121). The surface of the adjustment shaft (122) is in cooperation with the fixing groove (1011).

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