Underground coal mine steering platform with rail type hydraulic lifting arm structure

Abstract

The invention relates to the field of mine fully-mechanized mining hydraulic supports, in particular to an underground coal mine steering platform of a rail type hydraulic lifting arm structure, which comprises platform units and a support carrying mechanism, the guide frame platform, the transition platform, the steering platform and the loading platform are respectively hinged; the support carrying mechanism is located on the loading platform and comprises a flat car and a hydraulic lifting mechanism, and the flat car can run on the loading platform; in the process of installing the hydraulic support on the flat car, the mode that a loading platform with a rail is provided with a hydraulic lifting mechanism to lift the hydraulic support and place the hydraulic support on a flat plate, and the hydraulic support is conveyed out of a working face through cooperation of a winch is adopted to replace the traditional withdrawing mode that the support is directly dragged on a bottom plate through the winch in the existing withdrawing work. Compared with the traditional manual winch withdrawing, the complete equipment has the advantages that the labor cost is greatly saved, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of hydraulic supports for fully mechanized mining in mines, and in particular to an underground coal mine direction adjustment platform with a track-type hydraulic lifting arm structure, which is suitable for drawing, traction, direction adjustment and transportation of hydraulic supports when fully mechanized mining is in progress. Background Art

[0002] In underground coal mine comprehensive mining, after the coal mining work in a coal mining face is completed, or when a coal mining face is no longer mined, the comprehensive mining equipment must be withdrawn. During the withdrawal of the comprehensive mining equipment, each integral hydraulic support must be pulled out from the arranged hydraulic support, and then turned 90 degrees, and the integral hydraulic support must be transported along the arrangement direction of the hydraulic support. This involves the process of hydraulic support withdrawal and adjustment. The hydraulic support withdrawal and adjustment of the underground coal mine comprehensive mining face is completed using a hydraulic support adjustment platform.

[0003] The various existing steering platforms have formed a relatively complete way of withdrawing the hydraulic support. For the foldable steering platform, each platform structure is designed in a modular form, such as the guide platform, transition platform, steering platform, traction platform and loading platform; thereby realizing the extraction, steering and alignment of the hydraulic support on the withdrawal surface and the detachment of the hydraulic support from the loading platform by winch traction after reaching the loading platform, and then transferring it to the hydraulic support withdrawal vehicle; however, when detaching from the loading platform, the support is directly dragged on the bottom plate of the loading platform by a winch, which makes it difficult to transport the support, has low work efficiency and greatly increases labor costs.

[0004] With the existing publicly disclosed foldable direction-adjusting platform structure, the patent application publication number CN112177656A specifically records the withdrawal method of the hydraulic support on the direction-adjusting platform, wherein it is specifically recorded that after the hydraulic support is pulled out-directed-straightened, the hydraulic support is towed to the loading platform; the article records that through the loading arm and the push-pull wire rope on the loading platform, the hydraulic support to be evacuated is transferred to the hydraulic support withdrawal vehicle; however, there is no specific and clear record of how the hydraulic support is transferred to the hydraulic support withdrawal vehicle; that is, it is impossible to clearly state how the hydraulic support is specifically detached from the loading platform.

[0005] Therefore, the problem of hydraulic support detaching from the loading platform is a technical problem that needs to be solved when the comprehensive mining equipment is withdrawing from the comprehensive mining working face. Summary of the invention

[0006] In view of the technical defects of the above-mentioned prior art, the purpose of the present invention is to provide a coal mine underground direction adjustment platform with a rail-type hydraulic lifting arm structure. The direction adjustment platform adopts a folding structure and is suitable for the lifting, traction and transportation of the hydraulic support during the withdrawal of the underground comprehensive mining working face; it has the characteristics of reasonable structure and full hydraulic control; it has a simple structure, reliable operation, safe walking, and saves time and effort; it replaces the traditional withdrawal method of directly dragging the support on the bottom plate with a winch, and mechanizes the operation process; it reduces the labor intensity of workers, improves safety, and achieves fast, safe, reliable and efficient operation; it provides reliable guarantee for the installation of hydraulic supports for underground comprehensive mining working faces.

[0007] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: a coal mine underground adjustment platform of a track-type hydraulic lifting arm structure, comprising: a platform unit and a bracket handling mechanism arranged in an "L" shape in a modular folding structure, wherein the platform unit is arranged in an "L" shape in the order of a guide platform, a transition platform, a steering platform and a loading platform; the guide platform, the transition platform, the steering platform and the loading platform are respectively hinged, and the guide platform, the transition platform and the loading platform can be folded toward the direction of the steering platform; the bracket handling mechanism is located on the loading platform, and the bracket handling mechanism includes a flatbed car and a hydraulic lifting mechanism, and the flatbed car can travel on the loading platform; Furthermore, a track limit groove is horizontally provided in the middle of the loading platform, a track is arranged in the track limit groove, and the rollers at the bottom of the flatbed car cooperate with the track to enable the flatbed car to reciprocate above the loading platform; Furthermore, the track limit groove is a double groove arrangement of 600 mm, and the two track limit grooves are directly connected with the original track outside the turning platform at one end of the loading platform away from the turning platform; Furthermore, a hydraulic lifting mechanism is provided at the edge of the loading platform on both sides of the track limit groove, and the hydraulic lifting mechanism includes four sets of lifting arms and their matching lifting chain assemblies; wherein, each two sets of lifting arms and their matching lifting chain assemblies are located at the edge of the loading platform on the same side of the track limit groove, and the two sets of lifting arms on the same side of the track limit groove jointly support a retractable loading arm; a lifting arm hydraulic cylinder is provided in the lifting arm, and the top of the lifting arm is fixedly connected to the loading arm; near the position of each set of lifting arms A lifting chain assembly is installed, and the lifting chain assembly includes: a lifting chain, a lifting hook, a lifting sprocket frame, a sprocket shaft, a pentagonal wheel and a chain lock; a lifting sprocket frame is fixed to the upper end of the loading arm, two sprocket shafts are arranged inside the lifting sprocket frame, and pentagonal wheels are arranged on the two sprocket shafts respectively; one end of the lifting chain is fixed to the loading platform through the chain lock, and the other end of the lifting chain bypasses the two pentagonal wheels in the lifting sprocket frame and is connected to a lifting hook, and the lifting hook bypasses the loading arm and is located inside the loading arm, and is used to lift the hydraulic support; Based on the above-mentioned scheme, the four lifting hooks arranged on the two loading arms on the loading platform are used to lift the push-pull wire rope of the loading arm from the turning platform to the hydraulic support on the loading platform; the traction structure of the push-pull wire rope of the loading arm to pull the hydraulic support to the loading platform includes: two mutually parallel retractable loading arms, each loading arm is provided with a push cylinder, one end of the push cylinder is installed with a push-pull rope pulley, one end of the push-pull wire rope is fixed on the loading arm, and the other end of the push-pull wire rope passes around the push-pull rope pulley and is connected to the hydraulic support to be evacuated on the turning platform, and the telescopic end of the retractable loading arm is driven to be retracted and extended by the push cylinder, thereby further driving the movement of the hydraulic support to be evacuated.

[0008] Specifically, the telescopic loading arm comprises an outer wall and an inner arm inserted into the outer arm, the inner arm is slidably connected to the outer arm, and the push cylinder pushes the inner arm to be telescopic.

[0009] The above-mentioned hydraulic support to be evacuated that has been towed to the loading platform has completed the turning process, but the hydraulic support still needs to go through the process of extraction, adjustment and alignment before turning on the comprehensive mining withdrawal face; and the extraction, adjustment and alignment process of the hydraulic support needs to be completed through the structure of the guiding platform, transition platform, steering platform and traction platform of the adjustment platform.

[0010] Furthermore, the guide platform, transition platform, steering platform and loading platform are respectively hinged by dumbbell pins.

[0011] Furthermore, the front end of the guide platform is configured as an inclined platform; Furthermore, a traction platform is arranged outside the steering platform, and a main traction cylinder is arranged on the traction platform, and a main traction pulley is fixed at the end of the telescopic end of the main traction cylinder, one end of the main traction chain is fixed on the cylinder seat of the main traction cylinder, and the other end of the main traction chain bypasses the main traction pulley and extends to the guide frame platform, and is connected to the hydraulic support to be adjusted on the guide frame platform through a hook; a slideway is arranged on the traction platform, and a traction slider matched with the slideway is arranged below the main traction pulley, and the main traction pulley is pushed along the slideway toward the loading platform under the action of the main traction cylinder; an auxiliary traction arm is arranged above the main traction cylinder, and an arm propulsion cylinder that is telescopic in the same direction as the main traction cylinder is arranged inside the auxiliary traction arm; Furthermore, an auxiliary rope pulley is arranged on the steering platform, a return rope pulley is arranged on the cylinder seat of the main traction cylinder, one end of the auxiliary steel wire rope is fixed on the return rope pulley, and the other end of the auxiliary steel wire rope is passed around the main traction pulley and the auxiliary rope pulley in sequence and extended to the guide frame platform, and connected with the hydraulic support to be adjusted; Furthermore, a stepping cylinder in the same direction is respectively arranged on the steering platform and the transition platform, and the telescopic ends of the two stepping cylinders are respectively connected to the extended connecting rods, and the ends of the extended connecting rods are provided with connecting heads and connected to the shielding bracket in the mining working face; Furthermore, a row of inclined guide limit wheels are arranged at the edge of the transition platform to prevent the hydraulic support from being offside during the adjustment process, thus ensuring smooth adjustment. Furthermore, the loading platform includes a first platform section, a second platform section and a third platform section, two parallel tracks are distributed in the three platform section areas, and the first platform section, the second platform section and the third platform section are hinged by dumbbell pins.

[0012] The core of this solution is that the loading platform has the function of towing and lifting the hydraulic support (the track in the cut eye can enter the track groove limit of the loading platform), and the hydraulic support can be directly installed on the flatbed truck, and the hydraulic support can be transported out of the working surface by a winch or a rubber-wheeled truck.

[0013] The beneficial effects of the direction adjustment platform of the present invention are: The steering platform adopts a modular folding structure, which consists of a guide platform, a transition platform, a steering platform, a traction platform, a loading platform, a loading arm, a hydraulic control system, etc. Each platform is connected by stabilizing nails and high-strength bolts, making the platform assembly and disassembly process quick and easy; the folding structure can be folded into three parts, which is convenient for transportation and assembly into the well; The platform drives the main traction pulley and main traction chain through the extension and retraction of the main traction cylinder, and the auxiliary traction arm and loading arm cooperate to pull out the hydraulic support on the withdrawal surface, adjust the direction, straighten it, and then install it on the hydraulic support flatbed truck; in the process of installing the hydraulic support on the flatbed truck, a loading platform with tracks is used to set up a hydraulic lifting mechanism to lift the hydraulic support and place it on the flatbed, and then the hydraulic support is transported out of the working surface through the winch, replacing the traditional withdrawal method of directly dragging the support on the bottom plate with a winch during the previous withdrawal work; compared with the traditional manual winch withdrawal, the use of this set of equipment greatly saves labor costs and improves work efficiency; The steering platform can complete the transportation and steering of 8 to 10 hydraulic supports in 8 hours, which is 4 times faster than the process of using a winch to directly drag the supports on the bottom plate to withdraw them. It replaces the traditional withdrawal process and is a major reform in the withdrawal process of the fully mechanized mining face in coal mines, achieving speed, safety, reliability and efficiency, and providing intrinsically safe equipment for the withdrawal of hydraulic supports. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the steering platform of the present invention.

[0015] Figure 2 for Figure 1 main view.

[0016] Figure 3 for Figure 1 Left view of .

[0017] Figure 4This is the assembly drawing of the maneuvering platform (the hydraulic support has been lifted and landed on the flatbed truck).

[0018] Figure 5 This is a working status diagram of the platform lifting arm rising and lifting the hydraulic support.

[0019] Figure 6 for Figure 4 Side view of the assembly structure of the steering platform.

[0020] In the figure, 1, guide platform, 2, transition platform, 3, steering platform, 4, flatbed car, 5, track limit groove, 6, track, 7, lifting arm, 8, lifting arm hydraulic cylinder, 9, loading arm, 10, lifting chain, 11, lifting hook, 12, lifting sprocket frame, 13, sprocket shaft, 14, pentagon wheel, 15, chain lock, 16, push cylinder, 17, push-pull rope pulley, 18, push-pull wire rope, 19, hydraulic support, 19.1, base part, 19.2, hydraulic rod, 19.3, Upper top plate part, 20, inner arm of loading arm, 21, dumbbell pin, 22, traction platform, 23, main traction cylinder, 24, main traction pulley, 25, slideway, 26, auxiliary traction arm, 27, arm propulsion cylinder, 28, auxiliary rope pulley, 29, return rope pulley, 30, auxiliary wire rope, 31, stepping cylinder, 32, extension connecting rod, 33, connecting head, 34, guide limiting wheel, 35, first platform section, 36, second platform section, 37, third platform section, 38, bolt cover plate. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0022] Referring to the track-type hydraulic lifting arm structure of the coal mine underground steering platform as shown in the figure, it includes: a platform unit and a support handling mechanism arranged in an "L" shape with a modular folding structure, wherein the platform unit is arranged in an "L" shape in the order of a guide platform 1, a transition platform 2, a steering platform 3 and a loading platform; the guide platform 1, the transition platform 2, the steering platform 3 and the loading platform are respectively hinged, and the guide platform 1, the transition platform 2 and the loading platform 3 can be folded toward the steering platform 3; the support handling mechanism is located on the loading platform, and the support handling mechanism includes a flatbed car 4 and a hydraulic lifting mechanism, and the flatbed car 4 can travel on the loading platform; the hydraulic support steering platform is structurally divided into a folding symmetrical structure to meet the needs of the left and right working surfaces, and the modular structure steering platform is composed of a guide platform 1, a transition platform 2, a steering platform 3, a traction platform 22, a loading platform, a loading arm 9, a hydraulic control system, etc. Each platform is connected by stabilizing nails and high-strength bolts, making the platform assembly and disassembly process quick and easy; the foldable structure can be folded into three parts for easy transportation and assembly into the well.

[0023] Furthermore, a track limit groove 5 is horizontally provided in the middle of the loading platform, and a track 6 is provided in the track limit groove 5. The rollers at the bottom of the flatbed car 4 cooperate with the track 6 to enable the flatbed car 4 to reciprocate above the loading platform; Furthermore, the track limit groove 5 is a double groove setting of 600 mm, and the two track limit grooves 5 are directly connected with the original track outside the adjustment platform on the loading platform at one end away from the turning platform 3, so as to facilitate the flatbed car 4 to enter the loading platform track 6; Furthermore, a hydraulic lifting mechanism is provided at the edge of the loading platform on both sides of the track limit groove 5, and the hydraulic lifting mechanism includes four sets of lifting arms 7 and their matching lifting chain assemblies; wherein, every two sets of lifting arms 7 and their matching lifting chain assemblies are located at the edge of the loading platform on the same side of the track limit groove 5, and the two sets of lifting arms 7 on the same side of the track limit groove 5 jointly support a retractable loading arm 9; a lifting arm hydraulic cylinder 8 is provided in the lifting arm 7, and the top of the lifting arm 7 is fixedly connected to the loading arm 9; a lifting chain assembly is installed near each set of lifting arms 7, and the lifting chain The components include: a lifting chain 10, a lifting hook 11, a lifting sprocket frame 12, a sprocket shaft 13, a pentagonal wheel 14 and a chain lock 15; a lifting sprocket frame 12 is fixed to the upper end of the loading arm 9, two sprocket shafts 13 are arranged inside the lifting sprocket frame 12, and pentagonal wheels 14 are respectively arranged on the two sprocket shafts 13; one end of the lifting chain 10 is fixed to the loading platform through the chain lock 15, and the other end of the lifting chain 10 bypasses the two pentagonal wheels 14 in the lifting sprocket frame 12 and is connected to the lifting hook 11, and the lifting hook 11 bypasses the loading arm 9 and is located inside the loading arm 9, and is used to lift the hydraulic support 19; Based on the above technical solution, the four lifting hooks 11 arranged on the two loading arms 9 of the loading platform constitute four-point lifting. The four lifting points lift or lower the loading arms 9 through the action of the lifting hydraulic cylinders 8 in the four sets of lifting arms 7, and then the four lifting chains 10 on the loading arms 9 drive their respective lifting hooks 11 to lift or lower the hydraulic support 19 at the same time.

[0024] Based on the above-mentioned scheme, the four lifting hooks 11 wound around the two loading arms 9 on the loading platform are used to lift the push-pull wire rope 18 of the loading arm 9 from the turning platform 3 to the hydraulic support 19 on the loading platform; the traction structure of the push-pull wire rope 18 of the loading arm 9 to pull the hydraulic support 19 to the loading platform includes: two mutually parallel retractable loading arms 9, each loading arm 9 is provided with a push cylinder 16, one end of the push cylinder 16 is installed with a push-pull rope pulley 17, one end of the push-pull wire rope 18 is fixed on the loading arm 9, and the other end of the push-pull wire rope 18 passes around the push-pull rope pulley 17 and is connected to the hydraulic support 19 to be evacuated on the turning platform 3, and the telescopic end of the retractable loading arm 9 is driven to be retracted and retracted by the push cylinder 16, thereby further driving the movement of the hydraulic support 19 to be evacuated.

[0025] Specifically, the retractable loading arm 9 includes an outer wall and an inner arm 20 inserted inside the outer arm, the inner arm 20 is slidably connected to the outer arm, and the push cylinder 16 pushes the inner arm 20 to retract. The structure and working principle of the loading arm 9 involved in the above scheme of the present application are the same as the loading arm form recorded in the patent CN112177656A, which has been disclosed in the prior art and is named Folding Steering Platform.

[0026] The hydraulic support 19 to be evacuated that is towed to the loading platform has completed the turning process, but the hydraulic support 19 needs to go through the process of extraction, adjustment and alignment of the hydraulic support 19 before turning on the comprehensive mining withdrawal face; and the extraction, adjustment and alignment process of the hydraulic support 19 needs to be completed through the structure of the guiding platform 1, transition platform 2, steering platform 3 and traction platform 22 of the adjustment platform.

[0027] Furthermore, the said guide platform 1, transition platform 2, steering platform 3 and loading platform are respectively hinged by dumbbell pins 21. The hinged connection between the platforms facilitates the folding of the entire platform, reduces the area occupied by the entire steering platform, facilitates transportation down the well, and adapts to the conditions down the well; Furthermore, the front end of the said guide platform 1 is set as an inclined platform. When in use, the inclined platform of the guide platform 1 is placed in front of the hydraulic support 19, and the hydraulic support 19 can be smoothly guided to the adjustment platform; the said transition platform 2 forms a transition section, and the hydraulic support 19 is straightened as a whole; the steering platform 3 is to make the hydraulic support 19 gradually adjusted to 90 degrees while being pulled out, and the hydraulic support 19 after steering is pulled from the steering platform 3 to the loading platform through the push-pull wire rope 18 of the loading arm 9; Furthermore, the structures of the guide platform 1, transition platform 2, steering platform 3 and traction platform 22, the connection methods and working principles between the platforms are completely consistent with the corresponding structures in the patent CN112177656A disclosed in the prior art, named as foldable steering platform. Therefore, this part of the content of this application is directly recommended.

[0028] Specifically, a traction platform 22 is arranged outside the steering platform 3, and a main traction cylinder 23 is arranged on the traction platform 22. A main traction pulley 24 is fixed to the end of the telescopic end of the main traction cylinder 23, one end of the main traction chain is fixed to the cylinder seat of the main traction cylinder 23, and the other end of the main traction chain bypasses the main traction pulley 24 and extends to the guide frame platform 1, and is connected to the hydraulic support 19 to be adjusted on the guide frame platform 1 through a hook; a slideway 25 is arranged on the traction platform 22, and a traction slider matched with the slideway 25 is arranged below the main traction pulley 24. The main traction pulley 24 is pushed toward the loading platform along the slideway 25 under the action of the main traction cylinder 23; an auxiliary traction arm 26 is arranged above the main traction cylinder 23, and an arm propulsion cylinder 27 that is telescopic in the same direction as the main traction cylinder 23 is arranged inside the auxiliary traction arm 26; Furthermore, an auxiliary rope sheave 28 is provided on the steering platform 3, a return rope sheave 29 is provided on the cylinder seat of the main traction cylinder 23, one end of the auxiliary steel wire rope 30 is fixed on the return rope sheave 29, and the other end of the auxiliary steel wire rope 30 is passed around the main traction pulley 24 and the auxiliary rope sheave 28 in sequence and extended to the guide frame platform 1, and connected with the hydraulic support 19 to be adjusted; the main traction pulley 24 and the auxiliary rope sheave 28 are staggered, so that the main traction chain and the auxiliary steel wire rope 30 form a certain angle in the initial state, which is convenient for the connection and adjustment of the hydraulic support to be adjusted; Furthermore, a stepping cylinder 31 in the same direction is respectively arranged on the turning platform 3 and the transition platform 2, and the telescopic ends of the two stepping cylinders 31 are respectively connected to the lengthened connecting rods 32, and the ends of the lengthened connecting rods 32 are provided with connecting heads 33 and connected to the shielding bracket in the mining working face; Furthermore, a row of inclined guide limit wheels 34 are provided at the edge of the transition platform 2 to prevent the hydraulic support from being offside during the adjustment process, thereby ensuring smooth adjustment. Furthermore, the loading platform includes a first platform section 35, a second platform section 36 and a third platform section 37, two parallel tracks 6 are distributed in the three platform section areas, and the first platform section 35, the second platform section 36 and the third platform section 37 are hinged by a dumbbell pin 21.

[0029] It should be noted that the steering platform is connected and fixed to the ground by a number of bolts, and a bolt cover plate 38 is arranged above the bolts; the various hydraulic structures on the steering platform are detachably connected to the platform, which does not affect the folding effect of the steering platform. The hydraulic structure and the steering platform are installed and connected after they arrive at the comprehensive mining working face respectively.

[0030] The core of this solution is that the loading platform has the function of towing and lifting the hydraulic support (the cut-eye track can enter the track limit groove 5 of the loading platform), and the hydraulic support 19 is directly installed on the flatbed truck 4, and the hydraulic support is transported out of the working surface by a winch or a rubber-wheeled truck.

[0031] Reasons for choosing this solution's transfer platform: First, it replaces the traditional retrieval method of using a winch to directly drag the bracket on the bottom plate during the retrieval work. Compared with the traditional manual winch retrieval, the use of this set of equipment greatly saves labor costs, improves work efficiency, and improves the working environment of workers; Second, the operating system adopts full hydraulic control, which makes it easy to operate, noise-free, pollution-free, and more suitable for underground use; Third, the major components of the complete set of equipment are connected and arranged reasonably and orderly, forming a complete set of hydraulic support withdrawal technology, which solves the problem of difficult, dangerous and long-term withdrawal of hydraulic supports, and replaces the backward technology of directly pulling with a winch during traditional withdrawal. It is a major reform in the withdrawal technology of coal mines in comprehensive mining working faces.

[0032] The steps for withdrawing each set of hydraulic supports using the lifting platform of this solution are as follows: Step 1: The steering platform is arranged in front of the foot of the hydraulic support to be withdrawn, and the hydraulic support is guided to the steering platform through the inclined platform of the guide platform 1 of the steering platform; Step 2: Use the transition platform 2 to straighten the hydraulic support as a whole; use the steering platform 3 to pull out the hydraulic support, gradually adjust it to 90°, and then straighten it; use the two loading arms 9 above the loading platform to pull the hydraulic support 19 to the loading platform; at this time, connect the interface of the adjustment platform track 6 to the original track in a straight manner to prepare for the loading of the hydraulic support 19; Step 3: The two loading arms 9 are lifted by raising the four lifting arms 7 on the loading platform, so that the four lifting hooks 11 around the loading arms 9 are hung on the hydraulic support 19, and the hydraulic support 19 is lifted; Step 4: After the flatbed car 4 is moved along the track 6 to the top of the loading platform, the hydraulic support 19 is dropped onto the flatbed car 4 by lowering the four lifting arms 7. At this time, the four lifting hooks 11 on the hydraulic support 19 are released, and the flatbed car 4 and the hydraulic support 19 are fixed with bolts; Step 5: The winch pulls the flatbed truck 4 to withdraw the hydraulic support 19 from the working surface; after withdrawing from the working surface, prepare for the next hydraulic support to be withdrawn.

[0033] It should be noted in the above steps that the height of the hydraulic support 19 lifted by the lifting hooks 11 of the four lifting arms 7 must ensure that the bottom of the hydraulic support 19 exceeds the height of the upper top surface of the flatbed truck 4 when it is on the loading platform, ensuring that the flatbed truck 4 can enter the loading platform when the hydraulic support 19 is lifted.

[0034] In the third step, the hydraulic support 19 itself includes a base portion 19.1, a hydraulic rod 19.2 on the base portion 19.1 and an upper top plate portion 19.3; The sides of the base part 19.1 of the hydraulic support 19 are provided with four lifting holes corresponding to the four lifting hooks 11, and the four lifting hooks 11 hook the four lifting holes to lift the hydraulic support 19; During the above-mentioned withdrawal process, the two groups of stepping cylinders 31 adjusted to the platform are connected to the shielding support to ensure that after the hydraulic support 19 is evacuated, the mine will not collapse immediately with the support of the shielding support; when the next hydraulic support is withdrawn, the two shielding supports will be adjusted to move 1.5 meters or 1.75 meters toward the platform; and a section of track will be removed accordingly.

[0035] It should be noted that the parts not described in detail in the present invention are prior art.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0040] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0041] The above examples are only the best embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and many variations are possible. All variations that can be directly derived or associated with the contents disclosed by a person skilled in the art should be considered as the protection scope of the present invention.

Claims

1. A track-type hydraulic lifting arm structure for coal mine underground adjustment platform, characterized in that: include: The platform units and the support transport mechanism are arranged in an "L" shape with a modular folding structure, wherein the platform units are arranged in an "L" shape in the order of a frame-introducing platform, a transition platform, a turning platform and a loading platform; the frame-introducing platform, the transition platform, the turning platform and the loading platform are respectively hinged, and the frame-introducing platform, the transition platform and the loading platform can be folded toward the turning platform; the support transport mechanism is located on the loading platform, and the support transport mechanism includes a flatbed truck and a hydraulic lifting mechanism, and the flatbed truck can travel on the loading platform.

2. The underground coal mine adjustment platform of the rail-type hydraulic lifting arm structure according to claim 1 is characterized by: A track limiting groove is horizontally arranged in the middle of the loading platform, and a track is arranged in the track limiting groove. The rollers at the bottom of the flatbed car cooperate with the track to enable the flatbed car to reciprocate above the loading platform.

3. The underground coal mine adjustment platform of the track-type hydraulic lifting arm structure according to claim 2 is characterized in that: The track limit groove is a double groove arrangement of 600 mm, and the two track limit grooves are directly connected with the original track outside the turning platform at one end of the loading platform away from the turning platform.

4. The underground coal mine adjustment platform of the track-type hydraulic lifting arm structure according to claim 2 is characterized in that: A hydraulic lifting mechanism is arranged at the edge of the loading platform on both sides of the track limit groove, and the hydraulic lifting mechanism includes four sets of lifting arms and their matching lifting chain assemblies; wherein, every two sets of lifting arms and their matching lifting chain assemblies are located at the edge of the loading platform on the same side of the track limit groove, and the two sets of lifting arms on the same side of the track limit groove jointly support a retractable loading arm; a lifting arm hydraulic cylinder is arranged in the lifting arm, and the top of the lifting arm is fixedly connected to the loading arm; a lifting chain assembly is installed near each set of lifting arms, and the lifting chain assembly includes: a lifting chain, a lifting hook, a lifting sprocket frame, a sprocket shaft, a five-corner wheel and a chain lock; a lifting sprocket frame is fixed at the upper end of the loading arm, two sprocket shafts are arranged inside the lifting sprocket frame, and five-corner wheels are respectively arranged on the two sprocket shafts; one end of the lifting chain is fixed to the loading platform through a chain lock, and the other end of the lifting chain bypasses the two five-corner wheels in the lifting sprocket frame and is connected with a lifting hook, and the lifting hook bypasses the loading arm and is located on the inner side of the loading arm.

5. The underground coal mine adjustment platform of the track-type hydraulic lifting arm structure according to claim 4 is characterized in that: The four lifting hooks arranged around the two loading arms on the loading platform are used to lift the push-pull wire ropes of the loading arms from the steering platform to the hydraulic supports on the loading platform; The traction structure of the push-pull wire rope of the loading arm to pull the hydraulic support to the loading platform includes: two mutually parallel retractable loading arms, a push cylinder is arranged in each loading arm, a push-pull rope wheel is installed at one end of the push cylinder, one end of the push-pull wire rope is fixed on the loading arm, and the other end of the push-pull wire rope passes around the push-pull rope wheel and is connected to the hydraulic support to be evacuated on the steering platform. The telescopic end of the retractable loading arm is driven to retract and retract through the push cylinder, thereby further driving the movement of the hydraulic support to be evacuated.

6. The underground coal mine adjustment platform of the rail-type hydraulic lifting arm structure according to claim 1 is characterized by: The guide platform, transition platform, steering platform and loading platform are respectively hinged by dumbbell pins.

7. The underground coal mine adjustment platform of the track-type hydraulic lifting arm structure according to claim 1 is characterized by: The front end of the guide frame platform is set as an inclined platform; the outer side of the steering platform is set with a traction platform, and a main traction cylinder is set on the traction platform. The end of the telescopic end of the main traction cylinder is fixed with a main traction pulley, one end of the main traction chain is fixed on the cylinder seat of the main traction cylinder, and the other end of the main traction chain bypasses the main traction pulley and extends to the guide frame platform, and is connected with the hydraulic support to be adjusted on the guide frame platform through a hook; The traction platform is provided with a slideway, a traction slider matched with the slideway is provided below the main traction pulley, and the main traction pulley is pushed along the slideway toward the loading platform under the action of the main traction cylinder; an auxiliary traction arm is provided above the main traction cylinder, and an arm pushing cylinder which can be extended and retracted in the same direction as the main traction cylinder is provided inside the auxiliary traction arm; An auxiliary sheave is arranged on the steering platform, a return sheave is arranged on the cylinder seat of the main traction cylinder, one end of the auxiliary steel wire rope is fixed on the return sheave, and the other end of the auxiliary steel wire rope passes around the main traction pulley and the auxiliary sheave in sequence and extends to the guide frame platform and is connected to the hydraulic support to be adjusted.

8. The underground coal mine adjustment platform of the track-type hydraulic lifting arm structure according to claim 1 is characterized by: A stepping cylinder in the same direction is respectively arranged on the turning platform and the transition platform, and the telescopic ends of the two stepping cylinders are respectively connected to the extended connecting rods, and the ends of the extended connecting rods are provided with connecting heads and connected to the shielding brackets in the mining working face.

9. The underground coal mine adjustment platform of the track-type hydraulic lifting arm structure according to claim 8 is characterized in that: A row of inclined guide limiting wheels is arranged on the edge of the transition platform.

10. The underground coal mine adjustment platform of the track-type hydraulic lifting arm structure according to claim 3, characterized in that: The loading platform comprises a first platform section, a second platform section and a third platform section, two parallel tracks are distributed in the three platform section areas, and the first platform section, the second platform section and the third platform section are hinged by dumbbell pins.

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