A walkable support system for use in a coal mine

Abstract

The present application relates to the technical field of coal mine underground support equipment, and more particularly to a coal mine underground walkable support system. The coal mine underground walkable support system comprises a support system, a walking mechanism and a control system. The support system is arranged on the walking mechanism, and the control system is installed on the support system and the walking mechanism. Through the combination of the support system and the walking mechanism, the movable vehicle can walk, and the flexibility of the coal mining process crossing faults and the working face relocation is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mine underground support equipment, in particular to a coal mine underground walkable support system. BACKGROUND

[0002] Currently, there are two roof support management methods in the coal mine underground coal production support operation, one is to use hydraulic support to realize the support management of the roof in the comprehensive mechanized coal mining, and the other is to use single hydraulic prop to realize the support management of the roof in the ordinary mechanized coal mining.

[0003] The hydraulic support, as the roof support management method in the comprehensive mechanized coal mining process, has the characteristics of high support strength, low operation labor intensity, high automation and intelligence level, and is widely used in the coal seam above medium thickness. In the thin coal seam mining, according to the geological structure and the roof state, it also has certain application. However, due to the structural characteristics of the hydraulic support, in the process of the comprehensive mechanized coal mining, especially in the process of the comprehensive mechanized coal mining in the thin coal seam, the following shortcomings exist: heavy weight, difficult to move, poor flexibility, especially in the coal mining face relocation, withdrawal, and passing through the fault, the work load is large, the time is long, the labor intensity is large, and the efficiency is low. SUMMARY

[0004] The purpose of the present application is to provide a coal mine underground walkable support system, which can solve the problems of difficult movement and poor flexibility in the prior art.

[0005] The present application provides a coal mine underground walkable support system, which comprises a support system, a walking mechanism and a control system.

[0006] The support system is arranged on the walking mechanism, and the control system is arranged on the support system and the walking mechanism, and is used for controlling the operation of the support system and the walking mechanism.

[0007] Preferably, the support system comprises a double live column sleeve type hydraulic prop.

[0008] The double live column sleeve type hydraulic prop comprises a cylinder body, an inner live column, an outer live column, a guide sleeve and a rotation structure.

[0009] The inner live column is sleeved in the outer live column, and the outer live column is sleeved in the cylinder body.

[0010] The guide sleeve is arranged between the inner live column and the outer live column, and between the outer live column and the cylinder body.

[0011] The end of the inner live column and the outer live column is provided with a rotation structure.

[0012] Preferably, the cylinder body is provided with a self-sealing hose joint and a pressure protection control valve.

[0013] Preferably, the end of the inner piston and the end of the outer piston are respectively provided with an upper rotary structure and a lower rotary structure.

[0014] The upper rotary structure comprises a supporting ball head, an inner piston spherical groove and an upper gland.

[0015] The supporting ball head is arranged in the inner piston spherical groove, and the upper gland is arranged on the inner piston spherical groove and presses the supporting ball head.

[0016] The lower rotary structure comprises an outer piston ball head, a concave ball boot and a lower gland.

[0017] The outer piston ball head is arranged in the concave groove of the concave ball boot, and the lower gland is arranged on the concave groove and presses the outer piston ball head.

[0018] Preferably, the upper end and the lower end of the cylinder are respectively provided with an upper guide sleeve and a lower guide sleeve.

[0019] The upper guide sleeve is arranged between the cylinder and the inner piston, and the lower guide sleeve is arranged between the cylinder and the outer piston.

[0020] The inner piston and the outer piston are provided with an inner piston conical guide sleeve.

[0021] The outer piston and the cylinder are further provided with an outer piston conical guide sleeve, and the outer piston conical guide sleeve is arranged in the cavity between the outer piston and the cylinder.

[0022] Preferably, the walking mechanism comprises a walking device, a walking driving mechanism, a walking mechanism assembly and a walking mechanism assembly connecting plate.

[0023] The walking device and the walking driving mechanism are arranged on the walking mechanism assembly, and the walking driving mechanism is used to drive the movement of the walking device.

[0024] The walking mechanism assembly connecting plate is arranged on the walking mechanism assembly.

[0025] The supporting system is mounted on the walking mechanism assembly connecting plate.

[0026] Preferably, the walking mechanism assembly connecting plate is provided with an angle adjusting mechanism, and the supporting system is connected with the angle adjusting mechanism through a connecting mechanism.

[0027] Preferably, the coal mine underground walkable supporting system further comprises a closed control system.

[0028] The closed control system comprises a supporting force power source, a system control valve, a pressure overload protection valve, a dynamic self-sealing connector, a self-sealing liquid filling head, a walking mechanism controller, a remote control system receiver, a walking driver and a supporting hydraulic cylinder angle adjusting mechanism.

[0029] The support force power source is connected with the support system control valve through a self-sealing high-pressure pipe;

[0030] The pressure overload protection valve is arranged on the cylinder of the support system;

[0031] The support system control valve is connected with the self-sealing joint and the support hydraulic cylinder angle adjusting mechanism through a self-sealing high-pressure pipe;

[0032] The self-sealing joint is connected with the self-sealing liquid filling joint through a self-sealing high-pressure pipe;

[0033] The support system control valve is connected with the walking mechanism controller, and the walking mechanism controller is connected with the remote control system receiver.

[0034] Beneficial effects:

[0035] Through the combination of the support system and the walking mechanism, the movable vehicle can be moved, the flexibility of the coal mining process crossing the fault and the working face relocation is improved, and through the setting of the control system, the intelligent level of the roof support operation is improved. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the specific embodiments or prior art of the present application, the drawings needed to be used in the specific embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0037] Figure 1 The coal mine underground movable support system structure schematic diagram is provided for the specific embodiments of the present application;

[0038] Figure 2 The walking mechanism structure schematic diagram is provided for the specific embodiments of the present application;

[0039] Figure 3 The walking mechanism top view is provided for the specific embodiments of the present application;

[0040] Figure 4 The support system cross-sectional view is provided for the specific embodiments of the present application;

[0041] Figure 5 The control system structure layout schematic diagram is provided for the specific embodiments of the present application.

[0042] Explanation of reference signs:

[0043] 100-control system, 200-support system, 300-walking mechanism.

[0044] 200-support system:

[0045] 201 - support ball head, 202 - upper gland, 203 - inner ram, 204 - upper seal, 205 - upper guide sleeve, 206 - overpressure protection valve interface, 207 - self-sealing joint, 208 - cylinder, 209 - centering spring; 210 - lower guide sleeve, 211 - lower seal, 212 - outer ram, 213 - lower gland, 214 - concave ball shoe, 215 - outer ram conical guide sleeve, 216 - inner ram conical guide sleeve;

[0046] K1 - pressure protection valve inlet, K2 - cavity between cylinder and ram, K3 - operating valve inlet, K4 - central cavity, K5 - outer ram inlet hole;

[0047] 100 - control system;

[0048] 101 - support system power source, 102 - support system control valve, 103 - pressure overload protection valve, 104 - self-sealing joint, 1041 - self-sealing liquid filling joint, 105 - walking mechanism controller, 1051 - remote control system receiver, 106 - walking driving mechanism, 107 - support hydraulic cylinder angle adjusting mechanism, 1071: connecting structure.

[0049] 300 - walking mechanism:

[0050] 301 - walking device, 302 - walking driving mechanism, 303 - walking mechanism assembly, 304 - walking mechanism assembly connecting plate. DETAILED DESCRIPTION

[0051] The technical solutions of the present application will be described below in conjunction with embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0052] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0053] Furthermore, the terms "first", "second", "third", etc. are used herein for descriptive purposes only and should not be construed as indicating or implying relative importance or an ordered ranking of the indicated technical features. Thus, features defined with "first", "second" or "third" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless explicitly specified otherwise. Furthermore, the terms "mounting", "connected", "connecting" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0054] As Figure 1 shown, the present embodiment provides a walkable support system in coal mine, which comprises a control system 1, a support system 200 and a walking mechanism 3, the support system is arranged on the walking mechanism, the control system 1 is arranged on the support system 200 and the walking mechanism 3 and connected with the support system 200 and the walking mechanism 3 to control the operation of the support system 200 and the walking mechanism 3.

[0055] Through the combination of the support system and the walking mechanism, the walkable mobile vehicle improves the flexibility and intelligent level of the coal mining process crossing the fault and the working face relocation.

[0056] In order to further illustrate the above-mentioned walkable support system in coal mine, the present embodiment provides the structure of each component of the above-mentioned support system, which is specifically described as follows:

[0057] Support system 200

[0058] The main structural component of the support system 200 is a single-acting double-acting column sleeve type hydraulic prop, which comprises a cylinder body 208, an inner active column 203, an outer active column 212, a guide sleeve and a rotary structure, as shown in Figure 4 The structural features mainly embody the following aspects:

[0059] ① Double inner and outer active column design is adopted, as shown in Figure 4 The inner active column 203 and the outer active column 212 realize double active column bidirectional extension and contraction, improve the support efficiency and extension ratio, the inner active column 203 is sleeved in the outer active column 212, and the outer active column 212 is sleeved in the cylinder body 208.

[0060] ② A guide sleeve is arranged between the inner active column 203 and the outer active column 212, and between the outer active column 212 and the cylinder body 208, the guide sleeve is a conical guide sleeve, which cooperates with the conical cylinder at the end of the upper active column 203 to ensure the centering and retraction. As Figure 4The inner plunger taper guide sleeve 216 is arranged between the inner plunger 203 and the outer plunger 212, and the outer plunger taper guide sleeve 215 is arranged between the outer plunger 212 and the cylinder body 208.

[0061] ③The end of the inner plunger 203 and the outer plunger 212 is provided with a rotary structure. Figure 4 In particular, the rotary structure of the end of the inner plunger 203 and the outer plunger 212 is an upper rotary structure and a lower rotary structure, respectively.

[0062] The upper rotary structure includes a support ball head 201, an inner plunger spherical groove, and an upper gland 202.

[0063] The support ball head 201 is arranged in the inner plunger spherical groove, and the upper gland 202 is arranged on the inner plunger spherical groove and presses the support ball head 201.

[0064] The lower rotary structure includes an outer plunger ball head, a concave ball shoe sleeve 214, and a lower gland 213.

[0065] The outer plunger ball head is arranged in the concave groove of the concave ball shoe sleeve 214, and the lower gland 213 is arranged on the concave groove and presses the outer plunger ball head.

[0066] The upper rotary structure and the lower rotary structure adapt to the uneven changes of the floor and the roof in the coal mine underground, ensure the force balance of the hydraulic prop in the supporting process, and reduce the bending unbalanced force of the roof pressure on the prop.

[0067] ④The cylinder body 208 is welded with a self-sealing joint 207 to isolate air from entering the working cavity of the hydraulic prop, prevent the system components from being eroded, reduce the maintenance cost, and improve the working life of the components.

[0068] ⑤The cylinder body 208 is provided with a pressure overload protection valve 103 communicating with the inner cavity of the cylinder body 208, and the pressure overload protection valve 103 and the support system control valve 102 of the control system realize double operation and double control mode, improve the operation flexibility and efficiency, and ensure the safety and reliability of the roof support. The pressure overload protection valve 103, as a safety protection component of the hydraulic prop, can also be used as an auxiliary operation control of the support system control valve 102 to realize the auxiliary support operation of the roof.

[0069] The cylinder body 208 is provided with an overpressure protection valve interface 206 communicating with the space in the cylinder body 208, and the pressure overload protection valve 103 is arranged on the overpressure protection valve interface 206.

[0070] In particular, the ball head of the support ball head 201 is pressed in the spherical groove of the inner plunger 203 by the bolt of the upper gland 202.

[0071] The upper seal 204 realizes the sealing of the cavity K2 between the cylinder body 208 and the inner plunger.

[0072] The upper guide sleeve 205 is arranged between the cylinder and the inner piston rod 203, and the lower guide sleeve 210 is arranged between the cylinder and the outer piston rod 212 to guide the extension of the piston rod.

[0073] The self-sealing joint 207 is welded to the cylinder 208. The spring 209 is hung on the inner and outer piston rods and is distributed in the central cavity K4. The lower seal 211 seals the cavity K2 between the cylinder 208 and the outer piston rod 212.

[0074] The spherical head of the outer piston rod 212 is pressed in the concave groove of the concave boot 214 through the lower pressing cover 213. The outer piston rod conical guide sleeve 215 and the inner piston rod conical guide sleeve 216 are respectively fixed to the outer side and the inner side of the outer piston rod 212.

[0075] The pressure overload protection valve 103, the liquid inlet K1, the operating valve liquid inlet cavity K3, and the cavity K2 between the cylinder and the piston rod are all connected to the central cavity K4.

[0076] The walking mechanism 300

[0077] The walking mechanism 300 is composed of Figure 2 、 Figure 3 The walking mechanism 300 is mainly composed of a walking device 301, a walking driving mechanism 302, a walking mechanism assembly 303, and a walking mechanism assembly connecting plate 304.

[0078] The walking device 301 is a track type or tire type walking mechanism. The walking device 301 and the walking driving mechanism 302 are arranged on the walking mechanism assembly 302, the walking driving mechanism 302 is used to drive the movement of the walking device 301, the walking mechanism assembly connecting plate 304 is arranged on the walking mechanism assembly 303, and the support system 200 is installed on the walking mechanism assembly connecting plate 304.

[0079] The support hydraulic cylinder angle adjusting mechanism 107 is connected to the connecting mechanism 1071 between the cylinder 208. The structural features mainly include four aspects: ①power walking, convenient movement, small labor intensity for crossing faults and withdrawing from the working face, high working efficiency, and high intelligent level; ②mature structure is adopted to cooperate with multiple types of driving power systems, to expand the application of the equipment in different geological structure conditions in the coal mine, to overcome the restrictive application of the equipment by the underground gas, faults, and coal seam inclination; ③the walking mechanism cooperates with the closed system, to effectively avoid the rust and cavitation phenomena of the existing power liquid open power system, to improve the working environment of the system components, to prolong the working life of the components, and to reduce the system operation and maintenance costs; ④the installation angle of the support part is adjusted to realize the folding of the overall equipment, and the operation in the narrow space in the coal mine is facilitated.

[0080] The control system 100

[0081] The control system 100 is a closed control system, as shown in the figure. Figure 5 The roof support power source 101 is connected to the support system control valve 102 and the pressure overload protection valve 103 through a self-sealing high-pressure pipe. The support system control valve 102 is connected to the self-sealing joint 104 and the support hydraulic cylinder angle adjustment mechanism 107 through a self-sealing high-pressure pipe. The self-sealing joint 104 is connected to the self-sealing liquid filling joint 1041 through a self-sealing high-pressure pipe. The support system controller 102 sends a signal to control the walking mechanism controller 105, and the action of the walking mechanism controller 105 is also controlled by the remote control system receiver 1051.

[0082] The support system control valve 102, the walking mechanism controller 105, and the remote control system receiver 1051 form a self-sealing control operation system with the walking mechanism driver 106.

[0083] The walking mechanism 300 is provided with four evenly distributed hydraulic supports. The walking mechanism assembly connecting plate 304 is provided with the support hydraulic cylinder angle adjustment mechanism 107. The walking mechanism assembly connecting plate 304 is provided with two support hydraulic cylinder angle adjustment mechanisms 107. The support hydraulic cylinder angle adjustment mechanism 107 is connected to the hydraulic support through the connecting structure 1071.

[0084] The walking mechanism assembly 303 and the walking mechanism assembly connecting plate 305 are connected. The support hydraulic cylinder angle adjustment mechanism 107 is connected to the walking mechanism assembly connecting plate 304. The angle adjustment mechanism 107 is connected to the support system 201 through the connecting structure 1071. The walking device 301 is driven to walk by the walking driving mechanism 106, realizing straight walking or turning walking. The power of the driving mechanism 106 comes from the support system control valve 102, and can be adjusted by the walking mechanism controller 105. The walking mechanism controller 105 receives the control signal of the remote control system receiver controller 1051, realizing remote unmanned operation and control.

[0085] In summary, the coal mine underground walkable support system provided by the embodiment has the following advantages:

[0086] 1. Bidirectional telescopic control of the coal mine underground support column is realized, improving the work efficiency.

[0087] 2. Through the control of the controller, joint operation and control of multiple support columns are realized, improving the intelligent level of roof support management.

[0088] 3. Through the self-sealing joint, a closed liquid supply mode of the power liquid supply system is realized, reducing the occurrence of corrosion and cavitation of system components, reducing equipment maintenance cost, and improving equipment service life.

[0089] 4. The single-acting double-acting column packaged hydraulic prop matched with a movable vehicle realizes unmanned operation of the hydraulic prop of the machine mining working face, and improves the flexibility of the coal mining process in crossing the fault and moving the working face.

[0090] 5. The structure of the packaged hydraulic prop improves the telescopic ratio of the hydraulic prop, and increases the adaptability of the support device to different coal seam thicknesses.

[0091] 6. The folding support structure and its simple power walking mechanism reduce the investment cost of the comprehensive coal mining working face supporting equipment.

[0092] 7. The single-acting double-acting column hydraulic prop matched with a self-sealing support power system realizes the recycling of the power system of the machine mining working face.

[0093] 8. The control system adopts a combination of wireless remote control and on-site control to realize unmanned operation of the coal mining and filling operation.

[0094] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A walkable support system for use in a coal mine, characterised in that, The support system, the walking mechanism and the control system are included. The support system is arranged on the walking mechanism, and the control system is installed on the support system and the walking mechanism. The support system includes double-rod sleeve type hydraulic props. The double-rod sleeve type hydraulic prop includes a cylinder body, an inner rod, an outer rod, a guide sleeve and a rotating structure. The inner rod is sleeved in the outer rod, and the outer rod is sleeved in the cylinder body. Springs are hung on the inner rod and the outer rod and distributed in the central cavity. The guide sleeves are arranged between the inner rod and the outer rod and between the outer rod and the cylinder body. The end of the inner rod and the end of the outer rod are provided with the rotating structure. The inner rod and the outer rod realize two-way extension and contraction, and the support efficiency and the extension ratio are improved.

2. A walkable coal mine support system in a coal mine shaft according to claim 1, characterised in that, The upper seal realizes the sealing of the cavity K2 between the cylinder body and the inner rod, and the upper guide sleeve is arranged between the cylinder body and the inner rod.

3. The walkable underground coal mine support system of claim 1, wherein, The cylinder body is provided with a self-sealing hose joint and a pressure overload protection valve. The rotating structure at the end of the inner rod and the end of the outer rod is an upper rotating structure and a lower rotating structure respectively. The upper rotating structure includes a support ball head, an inner rod spherical groove and an upper gland. The support ball head is arranged in the inner rod spherical groove, and the upper gland is arranged on the inner rod spherical groove and presses the support ball head. The lower rotating structure includes an outer rod ball head, a concave ball boot and a lower gland.

4. The walkable underground coal mine support system of claim 1, wherein, The outer rod ball head is arranged in the concave groove of the concave ball boot, and the lower gland is arranged on the concave groove and presses the outer rod ball head. The upper end and the lower end of the cylinder body are respectively provided with an upper guide sleeve and a lower guide sleeve. The upper guide sleeve is arranged between the cylinder body and the inner rod, and the lower guide sleeve is arranged between the cylinder body and the outer rod. A inner rod conical guide sleeve is arranged between the inner rod and the outer rod.

5. The walkable underground coal mine support system of claim 1, wherein, An outer rod conical guide sleeve is further arranged between the outer rod and the cylinder body, and the outer rod conical guide sleeve is arranged in the cavity between the outer rod and the cylinder body. The walking mechanism includes a walking device, a walking driving mechanism, a walking mechanism assembly and a walking mechanism assembly connecting plate. The walking device and the walking driving mechanism are arranged on the walking mechanism assembly, and the walking driving mechanism is used for driving the movement of the walking device. The walking mechanism assembly connecting plate is arranged on the walking mechanism assembly.

6. A walkable coal mine support system in a coal mine shaft according to claim 5, characterised in that, The support system is installed on the walking mechanism assembly connecting plate.

7. The walkable underground coal mine support system of claim 1, wherein, An angle adjusting mechanism is arranged on the walking mechanism assembly connecting plate, and the support system is connected with the angle adjusting mechanism through a connecting mechanism. The control system includes a support force power source, a system control valve, a pressure overload protection valve, an automatic self-sealing connector, a self-sealing liquid filling head, a walking mechanism controller, a remote control system receiver, a walking driver and a support hydraulic cylinder angle adjusting mechanism. The support force power source is connected with the support system control valve through a self-sealing high-pressure pipe. The pressure overload protection valve is arranged on the cylinder body of the support system. The support system control valve is connected with the self-sealing connector and the support hydraulic cylinder angle adjusting mechanism through a self-sealing high-pressure pipe. The self-sealing connector is connected with the self-sealing liquid filling connector through a self-sealing high-pressure pipe. The support system control valve is connected with the walking mechanism controller, and the walking mechanism controller is connected with the remote control system receiver.

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