Centralized switching control system of coal mine air pressure machine

Abstract

The invention relates to the technical field of wind pressure machines, in particular to a coal mine wind pressure machine centralized switching control system, which comprises a first main wind pipe and a second main wind pipe, and further comprises a standby wind pipe arranged on one side of the first main wind pipe and the second main wind pipe, and the end part of the standby wind pipe passes through the tops of the first main wind pipe and the second main wind pipe; the airflow detection assembly is used for monitoring airflow conditions in the first main air pipe and the second main air pipe; the two switching assemblies are installed between the standby air pipe and the first main air pipe and between the standby air pipe and the second main air pipe and used for gradually switching the standby air pipe when damage exists. The control unit is used for starting the switching assembly when the airflow detection assembly detects that the airflow is abnormal; according to the device, through the arrangement of the switching assembly, the first main air pipe and the standby air pipe are switched in a sliding mode, and therefore the situation that when switching is conducted, the first main air pipe needs to be closed, airflow circulation is interrupted, and potential safety hazards are caused by underground harmful gas accumulation is avoided.

Description

Technical Field

[0001] The present invention relates to the field of air compressors, and particularly to a centralized switching control system for coal mine air compressors. Background Art

[0002] An air compressor is a mechanical device for transporting gases. It realizes functions such as transportation, blowing, and exhaust through air compression. The air compressor can transport fresh air into the coal mine shaft, provide oxygen required for miners to breathe, improve the underground working environment, discharge harmful gases such as methane and carbon monoxide generated underground out of the shaft, reduce the concentration of harmful gases, and prevent accidents such as methane explosions.

[0003] The coal mine ventilation system usually is equipped with a standby air compressor to ensure that it can be switched to the standby device in time when the main air compressor fails and maintain the normal operation of the ventilation system. When switching during the damage of the main fan, the fan needs to be stopped for switching, resulting in the stop of the underground air flow during the switching process, leading to an increase in the concentration of harmful gases underground and causing potential safety hazards. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the prior art, and a centralized switching control system for coal mine air compressors is proposed.

[0005] The present invention provides a centralized switching control system for coal mine air compressors, including a first main air duct and a second main air duct, and further including:

[0006] A standby air duct, arranged on one side of the first main air duct and the second main air duct, and the end passes through the tops of both;

[0007] An air inlet box, fixedly communicated with one ends of the first main air duct, the second main air duct, and the standby air duct;

[0008] A connecting channel, fixed to the other ends of the first main air duct and the second main air duct, and communicating with the underground ventilation duct;

[0009] Multiple power components, respectively fixedly installed inside the first main air duct, the second main air duct, and the standby air duct, for driving the air flow to flow after starting;

[0010] An air flow detection component, used for monitoring the air flow conditions inside the first main air duct and the second main air duct;

[0011] Two switching components, installed between the standby air duct and the first main air duct and between the standby air duct and the second main air duct, for gradually switching the standby air duct when there is damage;

[0012] A control unit for starting the switching component when the air flow detection component detects an abnormal air flow;

[0013] The air flow detection component can detect the air flow rate inside the first main air duct and the second main air duct. During normal operation, if a significant decrease in the air flow rate inside the first main air duct or the second main air duct is detected, at this time, the control unit controls the corresponding switching component on the first main air duct or the second main air duct to start. After the switching component starts, it gradually connects the first main air duct with the standby air duct or the second main air duct with the standby air duct;

[0014] For example, when the air flow rate inside the first main air duct significantly decreases, the control unit controls the switching component between the first main air duct and the standby air duct to start. After the switching component starts, it gradually connects the first main air duct with the standby air duct. As the decrease in the air flow rate inside the first main air duct gradually increases, the connection amount of the switching component gradually increases, so that the standby air duct can increase the air flow rate delivered to the inside of the first main air duct, thereby supplementing the decreased air flow rate inside the first main air duct. And by gradually increasing the connection amount of the switching component, the first main air duct and the standby air duct can be gradually fully connected. At this time, the power component inside the first main air duct is turned off to achieve the complete switching connection between the first main air duct and the standby air duct, which is beneficial to the smooth switching between the first main air duct and the standby air duct, and is beneficial to avoiding the interruption of air flow caused by closing the first main air duct during switching, resulting in the accumulation of harmful gases underground and causing potential safety hazards.

[0015] Preferably, the switching component includes:

[0016] A first rotating box rotatably sleeved on the outer circle of the standby air duct, and the first rotating box is connected to the standby air duct;

[0017] A driving mechanism installed on the top of the standby air duct for driving the first rotating box to rotate and switch;

[0018] A first rubber connection end fixedly connected to the outer wall of the first rotating box through a first flexible connection belt;

[0019] A moving connection end slidably installed on the top of the first main air duct or the second main air duct;

[0020] A connection mechanism installed between the first rubber connection end and the moving connection end for sealing and connecting the two when they are aligned and matched;

[0021] A moving sealing block fixed to the end of the moving connection end and slidably installed on the top of the first main air duct or the second main air duct;

[0022] The communication port is formed through the first main air duct or the second main air duct. Both the movable connection end and the movable sealing block are hermetically connected to the edge of the communication port through a sealing ring.

[0023] Taking the first main air duct as an example, when the first main air duct is damaged and the control switching component is activated, the control unit controls the driving mechanism to start. The driving mechanism drives the first rotating box to rotate. The first rotating box drives the first rubber connection end connected thereto to rotate synchronously. After the first rubber connection end rotates, it drives the movable sealing block to move through the action of friction. The movable sealing block drives the movable connection end to move, so that the movable connection end gradually moves towards the communication port. At the same time, the movable connection end is gradually communicated with the first rubber connection end through the communication mechanism. When the movable connection end is communicated with the first rubber connection end, the part of the movable connection end connected to the first rubber connection end moves to the top of the communication port, so that the movable connection end communicates with the first main air duct. At this time, the first main air duct is communicated with the standby air duct through the communication between the movable connection end and the first rubber connection end, and the communication process between the two is controlled according to the weakening amount of the air flow in the first main air duct. Therefore, it is beneficial to gradually communicate the movable connection end with the first rubber connection end when the first main air duct is not completely damaged, so as to avoid the situation that when switching after the first main air duct is damaged, the first main air duct stops, resulting in the interruption of ventilation in the underground environment and the accumulation of harmful gases in the underground, causing potential safety hazards.

[0024] Preferably, the communication mechanism includes:

[0025] A plurality of first insertion ends are fixedly communicated with the outer wall of the first rubber connection end in a linear array;

[0026] A plurality of first blocking frames are respectively fixed to the inner walls of the respective first insertion ends;

[0027] A plurality of first sealing plates are respectively slidably inserted into the inner walls of the respective first insertion ends, and the first blocking frame limits the first sealing plate;

[0028] A plurality of second blocking frames are respectively fixed inside a plurality of through holes formed through the movable connection end;

[0029] A plurality of second sealing plates are respectively slidably inserted into the respective through holes, and the second blocking frame limits the second sealing plate;

[0030] A plurality of pushing members are respectively installed between the respective first sealing plates and the second sealing plates, and are used to push the two away from each other when the first sealing plate and the second sealing plate are matched;

[0031] Taking the first main air duct as an example, when the movable connection end is aligned with the first rubber connection end, the first insertion end at the outermost end is inserted into the outermost through port. A first pressure sensor is arranged inside the through port. After the first insertion end is inserted into the through port, the corresponding first pressure sensor is squeezed, so that the first pressure sensor generates pressure information after being pressed, thereby identifying the insertion of the first insertion end and the through port. The first pressure sensor sends the pressure information to the control unit, so that the control unit controls the corresponding pusher to start according to the received pressure information. The pusher starts to push the first sealing plate and the second sealing plate inside the through port of the corresponding first insertion end to move away from each other, so that after the first sealing plate moves, it disengages from the inside of the first insertion end, enabling the air flow to pass through the inside of the first insertion end and circulate. At the same time, after the second sealing plate moves, it disengages from the inside of the through port, enabling the air flow to pass through the inside of the through port and circulate, so that the air flow can flow from the first insertion end to the through port, thereby connecting the first main air duct and the standby air duct;

[0032] As the first rotating box rotates, it drives the first rubber connection end to gradually rotate towards the movable connection port, so that the extrusion position between the movable connection end and the first rubber connection end gradually changes. And at the previous extrusion position between the movable connection end and the first rubber connection end, the first insertion end and the through port are completed for insertion. When moving towards the connection port as the first rotating box rotates, the first rubber connection end pulls the first flexible connection belt to stretch, and the first flexible connection belt then maintains the insertion of the first insertion end and the through port, that is, after the first insertion end and the through port move away from the extrusion position, the connection between the movable connection end and the first rubber connection end is maintained, and as the extrusion position changes, the connection range between the movable connection end and the first rubber connection end gradually increases, so that the first main air duct and the standby air duct are gradually completely connected;

[0033] The setting of the first blocking frame causes the air pressure inside the first main air duct to increase when the air flow inside the first main air duct circulates, that is, the air pressure inside the first main air duct increases. When the air flow velocity increases, the air pressure pushing the first sealing plate towards the first blocking frame increases, and the first blocking frame blocks the first sealing plate, so that the extrusion between the first sealing plate and the first blocking frame is enhanced, thereby increasing the sealing performance and being beneficial to reducing air flow leakage.

[0034] Preferably, the pusher includes:

[0035] A number of first cylinders, respectively fixed on the tops of the respective second sealing plates;

[0036] A number of first limiting plates, arranged in one-to-one correspondence with the first insertion end, and fixed inside the first rotating box;

[0037] Multiple groups of spherical insertion grooves, with two spherical insertion grooves in a group, are penetrated and opened on the first limiting plate;

[0038] Multiple groups of spherical insertion blocks, with two of the spherical insertion blocks as a group, respectively fixed to the tops of the respective second sealing plates, and the spherical insertion blocks being inserted and adapted to the spherical insertion grooves;

[0039] After the first cylinder is activated, it pushes the second sealing plate and the first sealing plate away from each other. After the first sealing plate moves upward, it presses the first limiting plate, causing the spherical insertion block on the first limiting plate to insert into the interior of the spherical insertion groove. Due to the spherical setting of the spherical insertion block, the first sealing plate and the first limiting plate are inserted and combined into one body. Thus, after the first flexible connection belt is stretched, the first sealing plate moves upward relative to the first rubber connection end following the rolling of the first rotating box with the first limiting plate, thereby avoiding the situation where the first sealing plate drops and causes the first insertion end to be blocked, and thus realizing and maintaining the connection between the first insertion end and the through port.

[0040] Preferably, the connection mechanism further includes:

[0041] Multiple groups of gears, with two of the gears as a group, and the two gears in the same group being symmetrically rotatably installed inside the through port;

[0042] Multiple groups of first racks, with two of the first racks as a group, and the two first racks in the same group being symmetrically slidably installed inside the through port. The first racks are meshed with the adjacent gears, and the bottoms of all the first racks are fixedly connected to the corresponding second sealing plates;

[0043] Multiple groups of second racks, with two of the second racks as a group, and the two second racks in the same group being symmetrically slidably installed inside the through port. The second racks are meshed with the adjacent gears, and first magnets are fixed to the tops of all the second racks;

[0044] Multiple second magnets, respectively fixed to the bottoms of the respective first sealing plates, and the second magnets attracting the first magnets with opposite magnetic poles;

[0045] When the first rubber connection end presses the moving connection end, the first sealing plate contacts the first magnet at the top of the second rack, so that the second magnet on the first sealing plate and the first magnet attract each other, connecting the first sealing plate to the second rack. Subsequently, when the first sealing plate moves upward with the first limiting plate, it can drive the first sealing plate and the second rack to move upward. When the second rack moves upward, it moves relative to the gear, thereby driving the gear to rotate, so as to drive the first rack to move downward, thereby pushing the second sealing plate to move downward. Thus, after the first sealing plate moves upward, the second sealing plate continues to move downward, which can increase the ventilation position range and is thus beneficial to improving the ventilation smoothness.

[0046] Preferably, the connection mechanism further includes:

[0047] Multiple groups of sliding grooves, with two of the sliding grooves as a group, and the sliding grooves of the same group are symmetrically opened inside the through hole;

[0048] Multiple connecting plates, which are arranged in one-to-one correspondence with the sliding grooves and are respectively slidably installed inside the sliding grooves, and the connecting plates are respectively fixedly connected to the second racks;

[0049] Multiple springs, which are arranged in one-to-one correspondence with the connecting plates and are respectively fixed between each connecting plate and the bottom of the sliding groove;

[0050] When the second rack moves upward, it drives the connecting plate to move upward. When the connecting plate moves upward to the top of the sliding groove, it is limited, so that the second rack cannot continue to move upward. Thus, when the first rotating box rotates and drives the first limiting plate to move upward by a distance exceeding the highest position of the upward movement of the second rack, the spherical plug block and the spherical plug groove on the second rack are forcibly pulled apart under the action of an external force. At this time, the second rack moves downward to reset and drives the first sealing plate to move downward to reset until the first sealing plate moves to the first blocking frame and is blocked. At this time, if the first rotating box continues to rotate and drives the first plug end to continue to move upward, the first magnet and the second magnet are forcibly pulled apart under the action of an external force. At this time, under the elastic force of the spring, the second rack is pulled downward to reset, thereby driving the first rack to move upward to reset, and at the same time driving the first sealing plate and the second sealing plate to achieve reset.

[0051] Preferably, it further includes:

[0052] Two second rotating boxes, which are respectively rotatably sleeved on the outer circles of the first main air duct and the second main air duct and are respectively communicated with them, and the second rotating boxes are driven to rotate by the driving mechanism;

[0053] Two second rubber connection ends, which are respectively fixedly communicated with the outer walls of the second rotating boxes through second flexible connection belts;

[0054] Multiple plug connection ports, which are linearly penetrated through the side wall of one of the second rubber connection ends along the edge of the second rubber connection end;

[0055] Multiple second plug ends, which are linearly fixed on the side wall of the other second rubber connection end along the edge of the second rubber connection end, and the plug connection ports are hermetically plugged and adapted to the plug connection ports;

[0056] Multiple connecting members, which are respectively installed between each plug connection port and the second plug end to achieve communication when the second plug end is plugged;

[0057] The driving mechanism drives the two second rotating boxes to rotate, controls the driving mechanism to drive the two second rotating boxes to rotate relatively, so that the two second rubber connection ends are mutually extruded. After the second rubber connection ends are mutually extruded, the second insertion end is inserted into the inside of the insertion connection port. A second pressure sensor is arranged inside the insertion connection port. When the second pressure sensor is pressed, the control unit controls the corresponding communication component to start, so that the communication component connects the second insertion end and the insertion connection port, thereby connecting the two second rotating boxes. Thus, when the spare air duct is damaged, the first main air duct and the second main air duct can cooperate to ventilate the pipeline connected to the damaged first main air duct or second main air duct, so as to avoid the occurrence of safety hazards caused by the interruption of the underground air flow.

[0058] Preferably, the communication component includes:

[0059] Two second limiting plates, respectively fixed on the inner walls of the two second rubber connection ends;

[0060] Two third blocking frames, respectively fixed inside the insertion connection port and the second insertion end;

[0061] A third sealing plate, slidably inserted inside the second insertion end;

[0062] A fourth sealing plate, slidably inserted inside the insertion connection port;

[0063] A second air cylinder, fixed between the third sealing plate and the fourth sealing plate;

[0064] After the second air cylinder starts, it pushes the third sealing plate and the fourth sealing plate away from each other. When the third sealing plate and the fourth sealing plate are blocked by the second limiting plate, they are limited, so that the air flow is connected along the second insertion end and the insertion connection port.

[0065] Preferably, the driving mechanism includes:

[0066] A motor, fixed on the top of the spare air duct or the first main air duct and the second main air duct through a support frame;

[0067] A first bevel gear, fixed at the end of the output shaft of the motor;

[0068] A second bevel gear, fixed on the side wall of the first rotating box or the second rotating box, and the first bevel gear meshes with the second bevel gear;

[0069] After the motor starts, it drives the first bevel gear connected thereto to rotate through the output shaft. After the first bevel gear rotates, it drives the second bevel gear meshing therewith to rotate. After the second bevel gear rotates, it drives the first rotating box or the second rotating box to rotate, thereby realizing the communication switching.

[0070] Preferably, it further includes:

[0071] A first flow control valve is fixedly installed on one side of the communication port facing the communication channel and on one side of the communication channel facing the air inlet box inside the first main air duct and the second main air duct;

[0072] A second flow control valve is fixedly installed at a position between the two first rotating boxes inside the standby air duct and at one end facing the first rotating box;

[0073] Taking the damage of the first main air duct as an example, at this time, if the standby air duct is intact, after the first main air duct is connected to the standby air duct, the control unit controls the first flow control valve at a position on one side of the communication channel facing the air inlet box in the first main air duct to close, so as to close one end of the first main air duct communicating with the air inlet box and avoid the overflow of air flow along the air inlet box;

[0074] At this time, if the standby air duct is damaged and the second main air duct is used to assist ventilation, according to the air flow rates required by the first main air duct and the second main air duct, the opening degree of the first flow control valve on one side of the communication port inside the first main air duct and the second main air duct facing the communication channel is controlled, so as to control the air flow rate passing through the air flow driven by the power component inside the first main air duct according to the opening degree of the first flow control valve inside the first main air duct and the second main air duct, so as to control the air flow rates at different positions underground;

[0075] The second flow control valve can control the air flow passage space of the standby air duct to adjust the air flow passage space in the standby air duct.

[0076] Compared with the prior art, the present invention has the following beneficial effects:

[0077] 1. Through the setting of the switching component, the present invention enables a smooth switch between the first main air duct and the standby air duct, which is beneficial to avoiding the interruption of air flow caused by the need to close the first main air duct during switching, resulting in the accumulation of harmful gases underground and potential safety hazards.

[0078] 2. Through the setting of the connection mechanism, after the first sealing plate moves upward, the second sealing plate continues to move downward, which can increase the ventilation position range and is beneficial to improving the ventilation smoothness. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0080] Figure 2 It is the Figure 1 enlarged schematic diagram of part A in the present invention.

[0081] Figure 3Schematic diagram of the structure after the overall section of the present invention.

[0082] Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the structure at position B in

[0083] Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure at position C in

[0084] Figure 6 Schematic diagram of the structure after the section of the switching component of the present invention.

[0085] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at position D in

[0086] Figure 8 Schematic diagram of the structure after the section of the second rotating box of the present invention.

[0087] Figure 9 For the present invention Figure 8 Enlarged schematic diagram of the structure at position E in

[0088] In the figure: 101, the first main air duct; 102, the second main air duct; 103, the air inlet box; 104, the connecting channel; 105, the standby air duct; 106, the power component; 2, the first rotating box; 201, the first rubber connection end; 202, the first flexible connection belt; 203, the movable connection end; 204, the movable sealing block; 205, the communication port; 3, the first plug-in end; 301, the first blocking frame; 302, the first sealing plate; 303, the second blocking frame; 304, the second sealing plate; 4, the first cylinder; 401, the first limiting plate; 402, the spherical plug-in groove; 403, the spherical plug-in block; 5, the gear; 501, the first rack; 502, the second rack; 6, the sliding groove; 601, the spring; 602, the connecting plate; 7, the motor; 701, the support frame; 702, the first bevel gear; 703, the second bevel gear; 8, the second rotating box; 801, the second flexible connection belt; 802, the second rubber connection end; 803, the plug-in connection port; 804, the second plug-in end; 9, the second cylinder; 901, the third sealing plate; 902, the third blocking frame; 903, the fourth sealing plate; 904, the second limiting plate. Detailed implementation manners

[0089] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations.

[0090] As Figures 1 to 9A centralized switching control system for a coal mine air compressor as shown, includes a first main air duct 101 and a second main air duct 102, and further includes:

[0091] A standby air duct 105, arranged on one side of the first main air duct 101 and the second main air duct 102, and the end passes over the tops of both of them;

[0092] An air inlet box 103, fixedly connected to one ends of the first main air duct 101, the second main air duct 102, and the standby air duct 105;

[0093] A connecting channel 104, fixed to the other ends of the first main air duct 101 and the second main air duct 102, and communicating with the underground ventilation duct;

[0094] A plurality of power components 106, respectively fixedly installed inside the first main air duct 101, the second main air duct 102, and the standby air duct 105, for driving the air flow to flow after starting;

[0095] An air flow detection component, for monitoring the air flow conditions inside the first main air duct 101 and the second main air duct 102;

[0096] Two switching components, installed between the standby air duct 105 and the first main air duct 101, and between the standby air duct 105 and the second main air duct 102, for gradually switching the standby air duct 105 when there is damage;

[0097] A control unit, for starting the switching component when the air flow detection component detects abnormal air flow;

[0098] A coal mine ventilation system usually is equipped with a standby air compressor to ensure that it can be switched to the standby equipment in time when the main air compressor fails, and maintain the normal operation of the ventilation system. When switching during the damage of the main fan, it is necessary to stop the fan for switching, resulting in the stop of the air flow underground during the switching process, leading to the situation that the concentration of harmful gases underground increases and causes potential safety hazards;

[0099] This embodiment of the present invention can solve the above problems. The specific implementation method is as follows. The air flow detection component can detect the air flow rate inside the first main air duct 101 and the second main air duct 102. During normal operation, if it detects a significant decrease in the air flow rate inside the first main air duct 101 or the second main air duct 102, at this time, the control unit controls the corresponding switching component on the first main air duct 101 or the second main air duct 102 to start. After the switching component starts, it gradually connects the first main air duct 101 and the standby air duct 105 or the second main air duct 102 and the standby air duct 105;

[0100] For example, when the air flow rate inside the first main air duct 101 drops significantly, the control unit controls the switching component between the first main air duct 101 and the standby air duct 105 to start. After the switching component starts, it gradually connects the first main air duct 101 and the standby air duct 105. As the drop in the air flow rate inside the first main air duct 101 gradually increases, the connection amount of the switching component gradually increases, so that the standby air duct 105 can increase the air flow rate delivered to the inside of the first main air duct 101, thereby supplementing the decreased air flow rate inside the first main air duct 101. And by gradually increasing the connection amount of the switching component, the first main air duct 101 and the standby air duct 105 can be gradually fully connected. At this time, the power component 106 inside the first main air duct 101 is turned off to achieve the complete switching connection between the first main air duct 101 and the standby air duct 105, which is beneficial to the smooth switching between the first main air duct 101 and the standby air duct 105, and is beneficial to avoiding the interruption of air flow caused by closing the first main air duct 101 during switching, resulting in the accumulation of harmful gases underground and causing potential safety hazards;

[0101] The power component 106 is composed of a driving motor and an impeller, and drives the air flow to flow through the rotation of the impeller.

[0102] As an optional embodiment, the switching component includes:

[0103] The first rotating box 2 is rotatably sleeved on the outer circle of the standby air duct 105, and the first rotating box 2 is connected to the standby air duct 105;

[0104] The driving mechanism is installed on the top of the standby air duct 105 and is used to drive the first rotating box 2 to rotate and switch;

[0105] The first rubber connection end 201 is fixedly connected to the outer wall of the first rotating box 2 through the first flexible connection belt 202;

[0106] The moving connection end 203 is slidably installed on the top of the first main air duct 101 or the second main air duct 102;

[0107] The connecting mechanism is installed between the first rubber connection end 201 and the moving connection end 203 and is used to seal and connect the two when they are aligned and matched;

[0108] The moving sealing block 204 is fixed to the end of the moving connection end 203 and is slidably installed on the top of the first main air duct 101 or the second main air duct 102;

[0109] The connection port 205 is penetrated and opened on the first main air duct 101 or the second main air duct 102, and both the moving connection end 203 and the moving sealing block 204 are sealed and connected to the edge of the connection port 205 through sealing rings;

[0110] Taking the first main air duct 101 as an example, when the first main air duct 101 is damaged and the control switching component is controlled to start, the control unit controls the driving mechanism to start. The driving mechanism drives the first rotating box 2 to rotate. The first rotating box 2 drives the first rubber connecting end 201 connected thereto to rotate synchronously. After the first rubber connecting end 201 rotates, it drives the movable sealing block 204 to move through the action of friction. The movable sealing block 204 drives the movable connecting end 203 to move, so that the movable connecting end 203 gradually moves towards the communication port 205. At the same time, the movable connecting end 203 is gradually communicated with the first rubber connecting end 201 through the communication mechanism. When the movable connecting end 203 is communicated with the first rubber connecting end 201, the part where the movable connecting end 203 is connected to the first rubber connecting end 201 moves to the top of the communication port 205, so that the movable connecting end 203 communicates with the first main air duct 101. At this time, the first main air duct 101 is communicated with the standby air duct 105 through the communication between the movable connecting end 203 and the first rubber connecting end 201, and the communication process between the two is controlled according to the weakening amount of the internal air flow of the first main air duct 101. Therefore, it is beneficial to gradually communicate the movable connecting end 203 with the first rubber connecting end 201 when the first main air duct 101 is not completely damaged, so as to avoid the situation that when the first main air duct 101 stops during the switching after being damaged, the ventilation of the underground environment is interrupted, resulting in the accumulation of harmful gases underground and causing potential safety hazards.

[0111] As an alternative embodiment, the communication mechanism includes:

[0112] A plurality of first insertion ends 3, which are fixedly communicated with the outer wall of the first rubber connecting end 201 in a linear array;

[0113] A plurality of first blocking frames 301, which are respectively fixed on the inner walls of the respective first insertion ends 3;

[0114] A plurality of first sealing plates 302, which are respectively slidably inserted into the inner walls of the respective first insertion ends 3, and the first blocking frames 301 limit the first sealing plates 302;

[0115] A plurality of second blocking frames 303, which are respectively fixed inside a plurality of through holes formed through the movable connecting end 203;

[0116] A plurality of second sealing plates 304, which are respectively slidably inserted into the respective through holes, and the second blocking frames 303 limit the second sealing plates 304;

[0117] A plurality of pushing members, which are respectively installed between the respective first sealing plates 302 and the second sealing plates 304, and are used to push the two away from each other when the first sealing plates 302 and the second sealing plates 304 are matched;

[0118] Taking the first main air duct 101 as an example, when the movable connection end 203 is aligned with the first rubber connection end 201, the first insertion end 3 at the outermost end is inserted into the outermost through hole. A first pressure sensor is arranged inside the through hole. After the first insertion end 3 is inserted into the through hole, the corresponding first pressure sensor is squeezed, so that the first pressure sensor generates pressure information after being pressed, thereby identifying the insertion of the first insertion end 3 into the through hole. The first pressure sensor sends the pressure information to the control unit, so that the control unit controls the corresponding pusher to start according to the received pressure information. The pusher starts to push the first sealing plate 302 and the second sealing plate 304 inside the through hole of the corresponding first insertion end 3 to move away from each other, so that after the first sealing plate 302 moves, it disengages from the inside of the first insertion end 3, enabling air flow to pass through the inside of the first insertion end 3. At the same time, after the second sealing plate 304 moves, it disengages from the inside of the through hole, enabling air flow to pass through the inside of the through hole, so that the air flow can flow from the first insertion end 3 to the through hole, thereby connecting the first main air duct 101 and the standby air duct 105;

[0119] As the first rotating box 2 rotates, it drives the first rubber connection end 201 to gradually rotate towards the movable connection port 205, so that the extrusion position between the movable connection end 203 and the first rubber connection end 201 gradually changes. And at the previous extrusion position between the movable connection end 203 and the first rubber connection end 201, the first insertion end 3 and the through hole are inserted. When moving towards the connection port 205 as the first rotating box 2 rotates, the first rubber connection end 201 pulls the first flexible connection belt 202 to stretch, and the first flexible connection belt 202 then maintains the insertion of the first insertion end 3 into the through hole, that is, after the first insertion end 3 and the through hole move away from the extrusion position, the connection between the movable connection end 203 and the first rubber connection end 201 is maintained, and as the extrusion position changes, the connection range between the movable connection end 203 and the first rubber connection end 201 gradually increases, so that the first main air duct 101 and the standby air duct 105 are gradually completely connected;

[0120] The setting of the first blocking frame 301 causes the air pressure inside the first main air duct 101 to increase when the air flow inside the first main air duct 101 circulates, that is, the air pressure inside the first main air duct 101 increases. When the air flow velocity increases, the air pressure pushing the first sealing plate 302 towards the first blocking frame 301 increases. The first blocking frame 301 blocks the first sealing plate 302, so that the extrusion between the first sealing plate 302 and the first blocking frame 301 is enhanced, thereby increasing the sealing performance and thus being beneficial to reducing air flow leakage.

[0121] As an alternative embodiment, the pusher includes:

[0122] A plurality of first cylinders 4, respectively fixed to the tops of the respective second sealing plates 304;

[0123] A number of first limiting plates 401, which are arranged in one-to-one correspondence with the first insertion end 3 and are fixed inside the first rotating box 2;

[0124] Multiple groups of spherical insertion grooves 402, with two spherical insertion grooves 402 as a group, are formed through the first limiting plate 401;

[0125] Multiple groups of spherical insertion blocks 403, with two spherical insertion blocks 403 as a group, are respectively fixed on the tops of the respective second sealing plates 304, and the spherical insertion blocks 403 are inserted and adapted to the spherical insertion grooves 402;

[0126] After the first cylinder 4 is started, it pushes the second sealing plate 304 and the first sealing plate 302 to move away from each other. After the first sealing plate 302 moves upward, it squeezes the first limiting plate 401, so that the spherical insertion blocks 403 on the first limiting plate 401 are inserted into the inside of the spherical insertion grooves 402. Due to the spherical setting of the spherical insertion blocks 403, the first sealing plate 302 and the first limiting plate 401 are inserted and combined into one body. Thus, after the first flexible connection belt 202 is stretched, the first sealing plate 302 moves upward relative to the first rubber connection end 201 following the rolling of the first rotating box 2 with the first limiting plate 401, thereby avoiding the situation that the first sealing plate 302 falls and causes the blockage of the first insertion end 3, and thus realizing and maintaining the communication between the first insertion end 3 and the through hole.

[0127] As an alternative embodiment, the communication mechanism further includes:

[0128] Multiple groups of gears 5, with two gears 5 as a group, and the two gears 5 in the same group are symmetrically rotatably installed inside the through hole;

[0129] Multiple groups of first racks 501, with two first racks 501 as a group, and the two first racks 501 in the same group are symmetrically slidably installed inside the through hole. The first racks 501 are engaged with the adjacent gears 5, and the bottoms of all the first racks 501 are fixedly connected to the corresponding second sealing plates 304;

[0130] Multiple groups of second racks 502, with two second racks 502 as a group, and the two second racks 502 in the same group are symmetrically slidably installed inside the through hole. The second racks 502 are engaged with the adjacent gears 5, and a first magnet is fixed on the top of all the second racks 502;

[0131] Multiple second magnets, which are respectively fixed on the bottoms of the respective first sealing plates 302, and the second magnets attract the first magnets with opposite magnetic poles;

[0132] When the first rubber connection end 201 extrudes and moves the connection end 203, the first sealing plate 302 contacts the first magnet at the top of the second rack 502, so that the second magnet on the first sealing plate 302 adsorbs with the first magnet, connecting the first sealing plate 302 to the second rack 502. Subsequently, when the first sealing plate 302 moves upward along with the first limiting plate 401, it can drive the first sealing plate 302 and the second rack 502 to move upward. When the second rack 502 moves upward, it moves relative to the gear 5, thereby driving the gear 5 to rotate, driving the first rack 501 to move downward, and thus pushing the second sealing plate 304 to move downward. Therefore, after the first sealing plate 302 moves upward, the second sealing plate 304 continues to move downward, which can increase the ventilation position range and is conducive to improving the ventilation smoothness.

[0133] As an alternative embodiment, the communication mechanism further includes:

[0134] Multiple groups of sliding grooves 6, with two sliding grooves 6 as a group, and the same-group sliding grooves 6 are symmetrically arranged inside the through hole;

[0135] Multiple connecting plates 602, which are arranged in one-to-one correspondence with the sliding grooves 6 and are respectively slidably installed inside the respective sliding grooves 6. The connecting plates 602 are respectively fixedly connected to the respective second racks 502;

[0136] Multiple springs 601, which are arranged in one-to-one correspondence with the connecting plates 602 and are respectively fixed between the respective connecting plates 602 and the bottoms of the sliding grooves 6;

[0137] When the second rack 502 moves upward, it drives the connecting plate 602 to move upward. After the connecting plate 602 moves upward to the top of the sliding groove 6, it is limited, so that the second rack 502 cannot continue to move upward. Thus, when the first rotating box 2 rotates and drives the first limiting plate 401 to move upward by a distance exceeding the highest position of the upward movement of the second rack 502, the spherical plug-in block 403 and the spherical plug-in groove 402 on the second rack 502 are forcibly pulled and separated under an external force. At this time, the second rack 502 moves downward to reset and drives the first sealing plate 302 to move downward to reset until the first sealing plate 302 moves to the first blocking frame 301 and is blocked. At this time, if the first rotating box 2 continues to rotate and drives the first plug-in end 3 to move upward continuously, the first magnet and the second magnet are forcibly pulled and separated under an external force. At this time, under the elastic force of the spring 601, the second rack 502 is pulled to move downward to reset, thereby driving the first rack 501 to move upward to reset, and at the same time driving the first sealing plate 302 and the second sealing plate 304 to achieve reset.

[0138] As an alternative embodiment, it further includes:

[0139] Two second rotating boxes 8 are respectively rotatably sleeved on the outer circles of the first main air duct 101 and the second main air duct 102, and are respectively communicated with both of them. The second rotating box 8 is driven to rotate by a driving mechanism;

[0140] Two second rubber connection ends 802 are respectively fixedly communicated with the outer walls of the second rotating boxes 8 through second flexible connection belts 801;

[0141] A plurality of plug-in connection ports 803 are linearly penetrated and opened on the side walls of one of the second rubber connection ends 802 along the edge;

[0142] A plurality of second plug-in ends 804 are linearly fixed on the side walls of the other second rubber connection end 802 along the edge. The plug-in connection ports 803 are hermetically plugged and adapted to the plug-in connection ports 803;

[0143] A plurality of connecting members are respectively installed between each plug-in connection port 803 and the second plug-in end 804 to achieve communication when the second plug-in end 804 is plugged;

[0144] The driving mechanism drives the two second rotating boxes 8 to rotate, controls the driving mechanism to drive the two second rotating boxes 8 to rotate relatively, so that the two second rubber connection ends 802 are mutually extruded. After the second rubber connection ends 802 are mutually extruded, the second plug-in end 804 is inserted into the interior of the plug-in connection port 803. A second pressure sensor is arranged inside the plug-in connection port 803. When the second pressure sensor is pressed, the control unit controls the corresponding connecting member to start, so that the connecting member connects the second plug-in end 804 and the plug-in connection port 803, thereby connecting the two second rotating boxes 8. Thus, when the spare air duct 105 is damaged, the first main air duct 101 and the second main air duct 102 can cooperate to work to ventilate the pipeline connected to the damaged first main air duct 101 or the second main air duct 102, so as to avoid the occurrence of safety hazards caused by the interruption of the underground air flow.

[0145] As an alternative embodiment, the connecting member includes:

[0146] Two second limiting plates 904 are respectively fixed on the inner walls of the two second rubber connection ends 802;

[0147] Two third blocking frames 902 are respectively fixed inside the plug-in connection port 803 and the second plug-in end 804;

[0148] A third sealing plate 901 is slidably inserted into the interior of the second plug-in end 804;

[0149] A fourth sealing plate 903 is slidably inserted into the interior of the plug-in connection port 803;

[0150] The second cylinder 9 is fixed between the third sealing plate 901 and the fourth sealing plate 903;

[0151] After the second cylinder 9 is started, it pushes the third sealing plate 901 and the fourth sealing plate 903 away from each other. When the third sealing plate 901 and the fourth sealing plate 903 are blocked by the second limiting plate 904, they are limited, so that the air flow is communicated along the second insertion end 804 and the insertion connection port 803.

[0152] As an alternative embodiment, the driving mechanism includes:

[0153] The motor 7 is fixed to the top of the standby air duct 105 or the first main air duct 101 and the second main air duct 102 through the support frame 701;

[0154] The first bevel gear 702 is fixed to the end of the output shaft of the motor 7;

[0155] The second bevel gear 703 is fixed to the side wall of the first rotating box 2 or the second rotating box 8, and the first bevel gear 702 meshes with the second bevel gear 703;

[0156] After the motor 7 is started, it drives the first bevel gear 702 connected thereto to rotate through the output shaft. After the first bevel gear 702 rotates, it drives the second bevel gear 703 meshing therewith to rotate. After the second bevel gear 703 rotates, it drives the first rotating box 2 or the second rotating box 8 to rotate, so as to realize the communication switching.

[0157] As an alternative embodiment, it further includes:

[0158] First flow control valves are fixedly installed on one side of the inside of the first main air duct 101 and the second main air duct 102 facing the communication port 205 towards the communication channel 104 and on one side of the communication channel 104 facing the air inlet box 103;

[0159] Second flow control valves are fixedly installed at the position between the two first rotating boxes 2 inside the standby air duct 105 and at one end facing the first rotating box 2;

[0160] Taking the damage of the first main air duct 101 as an example, at this time, if the standby air duct 105 is intact, after the first main air duct 101 and the standby air duct 105 are connected, the control unit controls the first flow control valve at the position on one side of the communication channel 104 facing the air inlet box 103 on the first main air duct 101 to close, so that one end of the first main air duct 101 communicating with the air inlet box 103 is closed, avoiding the occurrence of the situation that the air flow overflows along the air inlet box 103;

[0161] At this time, if the spare air duct 105 is damaged and the second main air duct 102 is used to assist in ventilation, according to the air flow rates required by the first main air duct 101 and the second main air duct 102, the opening degree of the first flow control valve on the side of the communication port 205 inside the first main air duct 101 and the second main air duct 102 facing the communication channel 104 is controlled, so as to control the air flow rate of the air flow driven by the power component 106 inside the first main air duct 101 according to the opening degree of the first flow control valve inside the first main air duct 101 and the second main air duct 102, so as to control the air flow rates at different positions underground;

[0162] The second flow control valve can control the air flow passage space of the spare air duct 105 to adjust the air flow passage space in the spare air duct 105.

[0163] The working principle of the present invention: The air flow detection component can detect the air flow rates inside the first main air duct 101 and the second main air duct 102. During normal operation, if it is detected that the air flow rate inside the first main air duct 101 or the second main air duct 102 drops significantly, at this time, the control unit controls the corresponding switching component on the first main air duct 101 or the second main air duct 102 to start. After the switching component starts, it gradually connects the first main air duct 101 and the spare air duct 105 or the second main air duct 102 and the spare air duct 105;

[0164] For example, when the air flow rate inside the first main air duct 101 drops significantly, the control unit controls the switching component between the first main air duct 101 and the spare air duct 105 to start. After the switching component starts, it gradually connects the first main air duct 101 and the spare air duct 105. As the drop amplitude of the air flow rate inside the first main air duct 101 gradually increases, the connection amount of the switching component gradually increases, so that the spare air duct 105 can increase the air flow rate delivered to the inside of the first main air duct 101, so as to supplement the decreased air flow rate inside the first main air duct 101. And by gradually increasing the connection amount of the switching component, it can gradually make the first main air duct 101 and the spare air duct 105 fully connected. At this time, the power component 106 inside the first main air duct 101 is turned off to realize the complete switching connection between the first main air duct 101 and the spare air duct 105, which is beneficial to the smooth switching between the first main air duct 101 and the spare air duct 105, and is beneficial to avoiding the interruption of air flow caused by closing the first main air duct 101 during switching, resulting in the accumulation of harmful gases underground and causing potential safety hazards.

[0165] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A centralized switching control system for a coal mine air compressor, comprising a first main air duct (101) and a second main air duct (102), characterized in that, It further includes: A spare air duct (105), arranged on one side of the first main air duct (101) and the second main air duct (102), and the end passes over the tops of both; An air inlet box (103), fixedly connected to one ends of the first main air duct (101), the second main air duct (102), and the spare air duct (105); A connecting channel (104), fixed to the other ends of the first main air duct (101) and the second main air duct (102), and communicating with the underground ventilation duct; A plurality of power components (106), respectively fixedly installed inside the first main air duct (101), the second main air duct (102), and the spare air duct (105), used to drive the air flow after startup; An air flow detection component, used to monitor the air flow conditions inside the first main air duct (101) and the second main air duct (102); Two switching components, installed between the spare air duct (105) and the first main air duct (101) and between the spare air duct (105) and the second main air duct (102), used to gradually switch the spare air duct (105) when there is damage; A control unit, used to start the switching component when the air flow detection component detects abnormal air flow; 2. The centralized switching control system of a coal mine air compressor according to claim 1, wherein, The switching component includes: A first rotating box (2), rotatably sleeved on the outer circle of the spare air duct (105), and the first rotating box (2) communicates with the spare air duct (105); A driving mechanism, installed on the top of the spare air duct (105), used to drive the first rotating box (2) to rotate and switch; A first rubber connection end (201), fixedly connected to the outer wall of the first rotating box (2) through a first flexible connection belt (202); A moving connection end (203), slidably installed on the top of the first main air duct (101) or the second main air duct (102); A connecting mechanism, installed between the first rubber connection end (201) and the moving connection end (203), used to seal and connect the two when they are aligned and matched; A moving sealing block (204), fixed to the end of the moving connection end (203), and slidably installed on the top of the first main air duct (101) or the second main air duct (102); A connecting port (205), penetratingly opened on the first main air duct (101) or the second main air duct (102), and both the moving connection end (203) and the moving sealing block (204) are hermetically connected to the edge of the connecting port (205) through a sealing ring; 3. The centralized switching control system of a coal mine air compressor according to claim 2, characterized in that, The connecting mechanism includes: A number of first insertion ends (3), fixedly connected to the outer wall of the first rubber connection end (201) in a linear array; A number of first blocking frames (301), respectively fixed to the inner walls of the respective first insertion ends (3); A number of first sealing plates (302), respectively slidably inserted into the inner walls of the respective first insertion ends (3), and the first blocking frames (301) limit the first sealing plates (302); A plurality of second blocking frames (303) are respectively fixed inside a number of through openings formed through the moving connection end (203); A plurality of second sealing plates (304) are respectively slidably inserted inside each of the through openings, and the second blocking frame (303) limits the second sealing plate (304); A plurality of pushing members are respectively installed between each of the first sealing plates (302) and the second sealing plates (304) for pushing the two away from each other when the first sealing plate (302) and the second sealing plate (304) are matched.

4. The centralized switching control system of a coal mine air compressor according to claim 3, wherein The pushing member includes: A number of first cylinders (4) are respectively fixed on the tops of each of the second sealing plates (304); A number of first limiting plates (401) are arranged in one-to-one correspondence with the first insertion end (3) and are fixed inside the first rotating box (2); Multiple groups of spherical insertion grooves (402), with two of the spherical insertion grooves (402) as a group, are formed through the first limiting plate (401); Multiple groups of spherical insertion blocks (403), with two of the spherical insertion blocks (403) as a group, are respectively fixed on the tops of each of the second sealing plates (304), and the spherical insertion blocks (403) are inserted and adapted to the spherical insertion grooves (402).

5. The centralized switching control system of a coal mine air compressor according to claim 4, characterized in that The communication mechanism further includes: Multiple groups of gears (5), with two of the gears (5) as a group, and the two gears (5) in the same group are symmetrically rotatably installed inside the through opening; Multiple groups of first racks (501), with two of the first racks (501) as a group, and the two first racks (501) in the same group are symmetrically slidably installed inside the through opening. The first rack (501) meshes with the adjacent gear (5), and the bottoms of all the first racks (501) are fixedly connected to the corresponding second sealing plate (304); Multiple groups of second racks (502), with two of the second racks (502) as a group, and the two second racks (502) in the same group are symmetrically slidably installed inside the through opening. The second rack (502) meshes with the adjacent gear (5), and a first magnet is fixed on the top of all the second racks (502); A plurality of second magnets are respectively fixed on the bottoms of each of the first sealing plates (302), and the second magnet attracts the first magnet with opposite magnetic poles.

6. The centralized switching control system of a coal mine air compressor according to claim 5, characterized in that, The communication mechanism further includes: Multiple groups of chutes (6), with two of the chutes (6) as a group, and the two chutes (6) in the same group are symmetrically formed inside the through opening; A plurality of connecting plates (602) are arranged in one-to-one correspondence with the chutes (6) and are respectively slidably installed inside each of the chutes (6). The connecting plates (602) are respectively fixedly connected to each of the second racks (502); A plurality of springs (601) are arranged in one-to-one correspondence with the connecting plates (602) and are respectively fixed between each of the connecting plates (602) and the bottoms of the chutes (6).

7. The centralized switching control system of a coal mine air compressor according to claim 6, characterized in that It further includes: Two second rotating boxes (8) are respectively rotatably sleeved on the outer circles of the first main air duct (101) and the second main air duct (102), and are respectively communicated with both of them. The second rotating box (8) is driven to rotate by the driving mechanism; Two second rubber connection ends (802) are respectively fixedly communicated with the outer walls of the second rotating boxes (8) through second flexible connection belts (801); A plurality of plug connection ports (803) are linearly and penetratingly formed in the side wall of one of the second rubber connection ends (802) along the edge; A plurality of second plug ends (804) are linearly fixed on the side wall of the other second rubber connection end (802) along the edge. The plug connection ports (803) are hermetically plugged and adapted to the plug connection ports (803); A plurality of communicating members are respectively installed between each of the plug connection ports (803) and the second plug ends (804) to achieve communication when the second plug ends (804) are plugged; 8. A centralized switching control system for a coal mine air compressor according to claim 7, characterized in that The communicating member includes: Two second limiting plates (904) are respectively fixed on the inner walls of the two second rubber connection ends (802); Two third blocking frames (902) are respectively fixed inside the plug connection ports (803) and the second plug ends (804); A third sealing plate (901) is slidably inserted into the inside of the second plug end (804); A fourth sealing plate (903) is slidably inserted into the inside of the plug connection port (803); A second cylinder (9) is fixed between the third sealing plate (901) and the fourth sealing plate (903).

9. The centralized switching control system of a coal mine air compressor according to claim 8, characterized in that, The driving mechanism includes: A motor (7) is fixed on the top of the standby air duct (105) or the first main air duct (101) and the second main air duct (102) through a support frame (701); A first bevel gear (702) is fixed at the end of the output shaft of the motor (7); A second bevel gear (703) is fixed on the side wall of the first rotating box (2) or the second rotating box (8). The first bevel gear (702) meshes with the second bevel gear (703).

10. A centralized switching control system for a coal mine air compressor, as claimed in claim 9, wherein, It further includes: First flow control valves are fixedly installed on one side of the communicating port (205) facing the communication channel (104) inside the first main air duct (101) and the second main air duct (102) and on one side of the communication channel (104) facing the air inlet box (103); Second flow control valves are fixedly installed at the position between the two first rotating boxes (2) inside the standby air duct (105) and at one end facing the first rotating box (2).

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