Large mining safe lifting system and method

Abstract

The invention relates to the technical field of large mine excavation, and discloses a large mine excavation safety lifting system and method and an electric vertical escalator, the large mine excavation safety lifting system comprises a vertically arranged guide rail and a lifting frame in sliding fit with the guide rail, and the lifting frame can ascend and descend along the guide rail through a transmission mechanism; the lifting frame comprises a pedal at the bottom and armrest frames on the two sides of the pedal. The first pressure sensor is installed at the pedal and used for detecting the pressure borne by the pedal. Through cooperation of the electric vertical escalator and the first pressure sensor, the controller can control the transmission mechanism to drive the lifting frame to ascend and descend according to the pressure detected by the first pressure sensor; the second pressure sensor is arranged at the position of the safety bandage, the controller obtains the relation between the pressure detected by the first pressure sensor and the pressure detected by the second pressure sensor, whether a person on the pedal records the safety bandage or not and stands stably or not can be judged, and the safety of the person when the person goes up and down a mine is guaranteed; according to the electric vertical escalator, the lifting safety is achieved under the condition that the occupied space is small.

Description

Technical Field

[0001] The present invention relates to the technical field of large-scale mining excavation, and in particular to a large-scale mining excavation safety lifting system and method. Background Art

[0002] Large mining excavators are large in size and have high cabs. It is much more difficult for drivers to get on and off the vehicles than ordinary excavators. Currently, drivers usually get on and off the cabs through vertical escalators or rotating escalators. Vertical escalators take up less space but have no tilt angle. Vertical escalators are almost vertical to the ground. Rotating escalators have a certain tilt angle but take up a large space. The specific problems of the above two escalators are as follows:

[0003] 1. Since vertical escalators have almost no inclination angle, it is difficult for drivers to observe the landing point when going down the escalator, and it is easy for them to step on empty space. For large-scale mining, there are greater safety hazards and a lack of safety protection mechanism.

[0004] 2. Although the escalator has a certain inclination angle, so that the driver can observe the foothold when going up and down, the escalator takes up a large space when unfolded. Affected by some special working conditions, the escalator may not be able to be unfolded and used normally, which has certain limitations. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a large-scale mining safety lifting system and method. The electric vertical escalator realizes the safety of lifting while occupying a small space; the signal transmission between the controller and the corresponding sensor ensures the safety of people lifting and lowering through the pedals.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] In a first aspect, a large-scale mining safety lifting system comprises:

[0008] An electric vertical escalator comprises a vertically arranged guide rail and a lifting frame that slides with the guide rail, and the lifting frame can be lifted and lowered along the guide rail through a transmission mechanism; the lifting frame comprises a pedal at the bottom and handrails on both sides of the pedal;

[0009] The first pressure sensor is installed at the pedal and is used to detect the pressure on the pedal; the controller can control the transmission mechanism to drive the lifting frame to move up and down according to the pressure detected by the first pressure sensor.

[0010] As a further implementation method, it also includes position sensors, a first position sensor at the top end of the guide rail and a second position sensor at the bottom end of the guide rail. When the lifting frame is lifted to a corresponding position, the corresponding position sensor is turned on, and the controller obtains a connection signal to control the lifting frame to lift according to the signal.

[0011] As a further implementation method, an operating switch is provided on the armrest, including an up key and a down key; the operating switch is connected to the controller, and the controller controls the corresponding lifting and lowering actions of the transmission mechanism by long pressing the up key and the down key; the outer sides of the top and bottom ends of the guide rail are correspondingly provided with a down button and an up button connected to the controller.

[0012] As a further implementation method, two sets of safety straps are provided on the armrest frame, one end of the two sets of safety straps are fixedly connected to the armrest frame, and the other end is matched through a plug interface; the safety straps are elastic straps, and the two sets of safety straps can be tightened on the driver after being plugged in.

[0013] As a further implementation method, a second pressure sensor is provided at the connection between the two groups of mounting straps and the handrail frame. When the second pressure sensor detects that the pressure exceeds a second set value, the controller controls the transmission mechanism to stop moving.

[0014] As a further implementation, a speaker is also included, the speaker is connected to the controller, and the speaker is used to issue a voice reminder.

[0015] As a further implementation method, when the first pressure sensor does not detect pressure and the pressure detected by two groups of second pressure sensors is less than the third set value, or when the pressure detected by the first pressure sensor is greater than the first set value and the pressure detected by the two groups of second pressure sensors is greater than the third set value and less than the second set value, the controller can control the lifting frame to rise and fall; the third set value is less than the second set value.

[0016] As a further implementation method, the guide rails on both sides of the lifting frame are coordinated with the chain through the upper sprocket and the lower sprocket, and the two sides of the lifting frame are fixedly connected to the chain on one side of the sprocket through the pedal connecting plate, and the two sets of upper sprockets are connected through a transmission shaft with a bevel gear, and the transmission shaft cooperates with the output end of the motor to realize the chain driving the pedal to rise and fall.

[0017] In a second aspect, a working method of a large-scale mining safety lifting system includes any of the above-described safety lifting systems, including the following steps:

[0018] The driver stands on the pedal and fastens the safety belt, and sends a lifting request through the up key or the down key. When the pressure detected by the first pressure sensor is greater than the first set value, and the pressure detected by the two groups of second pressure sensors is less than the second set value and greater than the third set value, the up key and the down key can be used to send instructions to the controller. The controller determines that it is a lifting instruction by someone, and the controller can control the transmission mechanism to drive the lifting frame to move up and down. When the first position sensor signal is connected, the lifting frame rises to the top end of the guide rail and the lifting frame stops lifting; when the second position sensor signal is connected, the lifting frame drops to the bottom end of the guide rail and the lifting frame stops lifting.

[0019] As a further implementation method, when the first pressure sensor detects no pressure and the pressure detected by the two groups of second pressure sensors is less than the third set value, an instruction is sent to the controller through the up button and the down button. The controller determines that it is an unmanned lifting instruction and can control the transmission mechanism to drive the lifting frame to rise and fall.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. The large-scale mining excavator of the present invention cooperates with the first pressure sensor through the electric vertical escalator, so that the controller can control the transmission mechanism to drive the lifting frame to rise and fall according to the pressure detected by the first pressure sensor; by setting the second pressure sensor at the safety belt, the controller obtains the relationship between the pressures detected by the first pressure sensor and the second pressure sensor, and can judge whether the personnel on the pedal are wearing the safety belt and standing firmly, and control the pedal to rise or fall or stop according to different situations, thereby ensuring the safety of personnel going up and down the mining excavator; the electric vertical escalator realizes the safety of lifting while occupying a small space.

[0022] 2. The operating switch of the present invention is arranged at the handrail, so that when the pedal is raised or lowered by the up key or the down key, it can ensure that the person's hands are placed on the handrail, providing a reliable guarantee for the person to stand firmly on the pedal.

[0023] 3. The present invention provides a first position sensor, a second position sensor and a speaker, so that a reminder can be issued through the speaker when the pedal reaches a specified position; the speaker can also issue a voice reminder when a person does not stand firmly or does not wear a safety belt.

[0024] 4. The pedal of the present invention is fixed to the chain through a pedal connecting plate, and the pedal connecting plate is located at the inner chain position, so that the outer edge of the pedal does not exceed the outer side of the guide rail by too much distance, thereby solving the problem of excessive space occupation of current rotating escalators. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0026] Figure 1 It is a schematic diagram of the overall structure of a large-scale mining safety lifting system in an embodiment of the present invention;

[0027] Figure 2 is a schematic structural diagram of a guide rail in an embodiment of the present invention;

[0028] Figure 3 It is a working flow chart of the pedal rising in the embodiment of the present invention.

[0029] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0030] Among them: 1. electric vertical escalator, 11. guide rail, 12. lifting frame, 2. operating switch, 31. first position sensor, 32. second position sensor; 4. pressure sensor, 5. safety belt, 6. speaker, 7. controller; 13. upper sprocket, 14. lower sprocket, 121. pedal connecting plate, 15. chain. DETAILED DESCRIPTION

[0031] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0032] Embodiment 1

[0033] In a typical embodiment of the present invention, reference is made to Figure 1-Figure 3 As shown, a large-scale mining safety lifting system includes an electric vertical escalator 1, an operating switch 2, a first position sensor 31, a second position sensor 32, a pressure sensor 4, a safety strap 5, a speaker 6 and a controller 7. The controller 7 is installed below the top platform of the mining excavation.

[0034] like Figure 1 As shown, the electric vertical escalator 1 includes two guide rails 11 and a lifting frame 12 slidingly fitted between the guide rails 11, and the lifting frame 12 can be lifted and lowered along the guide rails 11 through a transmission mechanism. The lifting frame includes a pedal at the bottom and handrails on both sides of the pedal. A support frame is provided on the inner side of the pedal, and both sides of the support frame are connected to the inner side of the handrail. The support frame is used to block the driver to prevent the driver from colliding with the machine body during the lifting process; no support structure is provided on the outer side of the pedal, so that the driver can step on the pedal from here.

[0035] The guide rail 11 is vertically arranged, with the bottom end close to the ground and the top end fixed on the body platform. The position sensor includes a first position sensor 31 and a second position sensor 32. The first position sensor 31 is arranged at the top end of the guide rail, and the second position sensor 32 is arranged at the bottom end of the guide rail. The first position sensor 31 is used to detect whether the pedal reaches the top end of the guide rail. When the first position sensor detects that the pedal reaches the top end, the first position sensor is turned on, and the controller obtains the connection signal to determine that the pedal has reached the top of the guide rail; correspondingly, when the second position sensor is turned on, the controller 7 determines that the pedal has reached the bottom position of the guide rail. When the lifting frame is lifted to the corresponding position, the corresponding position sensor is turned on and sends a signal to the controller. The controller 7 controls the motor according to the signal to stop the lifting frame from lifting.

[0036] like Figure 2 As shown, it is a schematic diagram of a transmission mechanism, two sets of guide rails 11 are arranged opposite to each other, and are a shell structure, and a chain 16 is arranged on one side of the opposite arrangement, wherein an upper sprocket 13 is arranged on the top of the guide rail 11, and a lower sprocket 14 is arranged on the bottom, and the upper sprocket 13 and the lower sprocket of each guide rail are matched through a chain 15. The upper sprocket 13 is a driving sprocket.

[0037] The main body of the driving mechanism is a motor, which is located inside the machine body between the two sets of upper sprockets 13. The two sides of the lifting frame are fixedly connected to the chain 15 on one side of the sprocket through the pedal connecting plate 121. The two sets of upper sprockets 13 are connected through a transmission shaft with bevel gears. The first bevel gear on the transmission shaft cooperates with the second bevel gear at the output end of the motor to form a bevel gear set, so that the motor drives the transmission shaft to rotate, and then drives the two sets of upper sprockets to rotate. The part where the chain 15 is connected to the pedal connecting plate 121 is located on the inner side of the guide rail, so Figure 2 The guide rail shown in Figure 1 The guide rail on the right side of the pedal in the viewing direction is intended to prevent the outer end of the pedal from extending too far outward and occupying space. By arranging the pedal connecting plate 121 on the inner vertical chain, the problem of pedal space occupation can be improved.

[0038] It can be understood that the motor structure is not shown in the figure and is a prior art. A bevel gear reduction mechanism can be set between the motor and the transmission shaft to ensure the smooth lifting and lowering of the pedal. The bevel gear reduction mechanism is a prior art and will not be elaborated as long as it can be achieved through bevel gear reduction.

[0039] In this embodiment, corresponding driving mechanisms and transmission mechanisms are provided to realize the movement of the pedal driven by the chain, and the lifting and lowering switching is realized by the forward and reverse rotation of the motor.

[0040] Furthermore, an operating switch 2 is provided on the handrail, including an up button and a down button; the operating switch is connected to the controller, and the controller controls the motor to rotate by long pressing the up button and the down button to complete the corresponding lifting action. By setting the operating switch 2 on the handrail, on the one hand, it is convenient for the driver to match the height of the hand with the handrail when standing on the pedal, which is convenient for operation. On the other hand, it can also ensure that the driver's hand is placed on the handrail during the lifting process to ensure safety; the handrail is welded by corresponding horizontal bars, vertical bars and diagonal bars, and the structural form is not specifically limited.

[0041] It can be understood that a descending button and an ascending button connected to the controller 7 are correspondingly provided at the outer sides of the top and bottom ends of the guide rail 11 shell; the ascending button and the descending button have the same function as the corresponding ascending key and descending key, forming a double-control switch; the purpose is to achieve double control; its working principle is similar to that of the double-control switches on the market.

[0042] The above-mentioned dual-control structure is provided for the purpose of realizing that when the driver stands on the pedal, the pedal can be controlled to rise and fall by operating the switch; when there is no one on the pedal, for example, after the driver reaches the cockpit, the pedal can be controlled to descend by pressing the descending button at the top of the guide rail; on the ground, the unmanned pedal can be controlled to rise by the ascending button, so as to realize the situation where multiple people need to get on and off the cab in certain special circumstances.

[0043] To ensure safety, the electric vertical escalator 1 is provided with a pressure sensor 4, wherein the first pressure sensor is installed at the bottom of the pedal and supported by a corresponding support frame. When a person steps on the pedal, the pressure sensor 4 will detect the pressure on the pedal. The controller can control the transmission mechanism to drive the lifting frame to rise and fall according to the pressure detected by the first pressure sensor.

[0044] In order to further ensure safety, two sets of safety straps are provided on the armrest frame, and one end of the two sets of safety straps 5 are fixed to the armrest frames on the left and right sides, that is, one set of safety straps 5 has one end fixed to the left armrest frame, and the other set of safety straps 5 has one end fixed to the left armrest frame and the other set of safety straps 5 has one end fixed to the left armrest frame and the right armrest frame, and the other end of the safety straps 5 is matched through the plug interface. The safety straps are elastic straps with a certain elasticity, so that the two sets of safety straps can be tightened on the driver after being plugged in.

[0045] A second pressure sensor is provided at the connection between the two sets of mounting straps 5 and the armrest frame. When tightened on the driver, the second pressure sensor can detect the pressure and transmit it to the controller. The controller 7 can judge the corresponding state according to the corresponding pressure value and control the motor to make corresponding action.

[0046] This embodiment uses two sets of position sensors, one set of first pressure sensors and two sets of second pressure sensors to detect, so that the controller controls the motor to run or stop according to the corresponding detection conditions. It also includes a speaker arranged on the top of the cab, the speaker is connected to the controller, and the speaker is used to issue a voice reminder.

[0047] Specific:

[0048] Case 1: The first pressure sensor detects pressure, indicating that there is someone on the pedal, and the pressure detected by the first pressure sensor is greater than the first set value; at the same time, when the pressure detected by the two sets of second pressure sensors is greater than the third set value and less than the second set value, it means that there is someone on the pedal and standing firmly. At this time, the double-control switch can send instructions to the controller, and the controller controls the motor to operate and realize the pedal lifting. This situation is expressed as: Nsteps>N 1 ; and N 3 <N belt <N 2 .

[0049] Situation 2: The first pressure sensor detects pressure, and the pressure detected by the first pressure sensor is greater than the first set value, indicating that there is someone on the pedal; however, when the pressures detected by the two groups of second pressure sensors are greater than the second set value, the controller controls the transmission mechanism to stop operating, and at this time the motor stops; this situation means that when the driver stands on the pedal and rises and falls, the driver's pressure on the safety belt is too large, and it is possible that the driver does not stand firmly on the pedal and there is a situation of body tilt. At this time, the pedal stops rising and falling, and the controller controls the speaker to issue a voice reminder for the driver to stand firm. This situation is expressed as: N_step > N 1 ; but N_belt > N 2 . When the pressure detected by the second pressure sensor is less than the second set value and greater than the third set value, it means that the person on the pedal stands firm and returns to Situation 1. At this time, the double-control switch can control the motor to run again.

[0050] Situation 3: When N_step > N 1 , but when the two groups of second pressure sensors do not detect pressure, it means that there is someone on the pedal and the safety belt is not fastened. At this time, the pedal cannot rise and fall, which is expressed as N_step > N 1 , N_belt = 0; the speaker reminds the person to fasten the safety belt; when N 3 < N_belt < N 2 , the pedal can rise and fall again.

[0051] Situation 4: When the first pressure sensor does not detect pressure, that is, N_step = 0, and at the same time the pressures detected by the two groups of second pressure sensors are less than the third set value (equivalent to the second pressure sensor not detecting pressure. Generally, by default, when there is no one on the pedal, the second pressure sensor can detect a small pressure due to the gravity of the safety belt, but less than the third set value. This situation can be represented by N_belt = 0), the controller determines that there is no one on the pedal; the controller can control the lifting frame to rise and fall, which is achieved through the up button and the down button.

[0052] The principle for setting the first set value N in this embodiment 1 is: less than but close to the value detected by the first pressure sensor presented by the weight of an adult, for example, 400N.

[0053] The principle for setting the second set value N in this embodiment 2 is: when the driver tilts on the pedal, the value detected by the second pressure sensor increases, for example, 150N; the second set value N 2 is greater than the pressure detected by the second pressure sensor under the condition of properly fastening the safety belt.

[0054] The principle for setting the third set value N in this embodiment 3 is: when the driver fastens the safety belt and stands firm, the safety belt is tightened on the driver, so that the second pressure sensor has an initial detected value, for example, 50N, and the third set value N3 The pressure detected by the second pressure sensor is lower than the pressure detected by the second pressure sensor when the safety belt is normally fastened. The technician can adjust different set values ​​as needed.

[0055] N represents the pressure detected by the first pressure sensor; N represents the pressure detected by the second pressure sensor.

[0056] After the pedal reaches the specified position, the first position sensor 31 and the second position sensor 32 can detect the pedal position, so that the corresponding position sensor is connected with the controller signal. At this time, the controller determines that the pedal has reached the top or the bottom and sends a voice reminder through the speaker.

[0057] In other examples, the up button and the down button can be replaced by a remote controller, also achieving dual control.

[0058] Embodiment 2

[0059] In a typical embodiment of the present invention, reference is made to Figure 1-Figure 3 As shown, a working method of a large-scale mining safety lifting system includes the safety lifting system described in Example 1, including the following steps:

[0060] Case 1:

[0061] The driver stands on the pedal and fastens the safety belt 5, and sends a lifting command request through the up key or the down key. The controller 7 first obtains the position sensor signal. If the first position sensor 31 and the second position sensor 32 are not connected, it means that the pedal can be raised or lowered; if the first position sensor 31 is connected, it means that the pedal can be lowered; if the second position sensor 32 is connected, it means that the pedal can be raised.

[0062] The controller 7 sequentially obtains data from the first pressure sensor and the second pressure sensor;

[0063] When the pressure detected by the first pressure sensor is greater than the first set value, and the pressure detected by the two sets of second pressure sensors is less than the second set value and greater than the third set value, the above situation is expressed as: Nstep>N 1 ; and N 3 <N belt <N 2 , the controller determines that someone has issued a lifting instruction. At this time, the up and down keys on the armrest can send instructions to the controller, and the controller can control the transmission mechanism to drive the pedal to rise and fall.

[0064] When the signal of the first position sensor 31 is connected, the lifting frame rises to the top of the guide rail 11 and stops lifting; when the signal of the second position sensor 32 is connected, the lifting frame falls to the bottom of the guide rail 11 and stops lifting, and the speaker 6 can give corresponding voice prompts according to whether the pedal rises to the bottom or the top.

[0065] When Nstep > N 1 , and at the same time N 2 < Nbelt, the controller determines that the person may be in an inclined state and not standing firmly on the pedal. The controller controls the motor to stop, the pedal stops lifting, and the speaker prompts the person to stand firmly; when N 3 < Nbelt < N 2 , the pedal can be lifted and lowered again.

[0066] When Nstep > N 1 , and Nbelt = 0, the controller determines that the person has not fastened the safety belt. The controller controls the motor to stop, and the pedal cannot be lifted and lowered. The speaker prompts the person to fasten the safety belt. When N 3 < Nbelt < N 2 , the pedal can be lifted and lowered again.

[0067] When Nstep = 0, the controller determines that there is no lifting instruction for the pedal. Then, there is no need to fasten the safety belt, so Nbelt < N 3 , which can be expressed as Nbelt = 0; at this time, the pedal can be lifted and lowered by the up button and the down button. This situation can be used when the pedal needs to continuously transport multiple people and is required in the occasion where the pedal is unmanned but needs to be lifted and lowered.

[0068] In this embodiment, the controller continuously monitors the corresponding sensors. When the operating conditions of the lifting frame are not met, the motor is controlled to stop, thereby ensuring the safety of personnel during the lifting and lowering on the pedal.

[0069] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A large-scale mining safety lifting system, characterized in that: include: An electric vertical escalator comprises a vertically arranged guide rail and a lifting frame that slides with the guide rail, and the lifting frame can be lifted and lowered along the guide rail through a transmission mechanism; the lifting frame comprises a pedal at the bottom and handrails on both sides of the pedal; The first pressure sensor is installed at the pedal and is used to detect the pressure on the pedal; the controller can control the transmission mechanism to drive the lifting frame to move up and down according to the pressure detected by the first pressure sensor.

2. A large-scale mining safety lifting system according to claim 1, characterized in that: It also includes position sensors, a first position sensor at the top end of the guide rail and a second position sensor at the bottom end of the guide rail. When the lifting frame is lifted to a corresponding position, the corresponding position sensor is turned on, and the controller obtains the connection signal and controls the lifting frame to lift according to the signal.

3. A large-scale mining safety lifting system according to claim 2, characterized in that: The armrest is provided with an operating switch, including an up key and a down key; the operating switch is connected to the controller, and the controller controls the corresponding lifting and lowering actions of the transmission mechanism by long pressing the up key and the down key; the outer sides of the top and bottom ends of the guide rail are correspondingly provided with a down button and an up button connected to the controller.

4. A large-scale mining safety lifting system according to claim 3, characterized in that: The armrest frame is provided with two sets of safety straps, one end of the two sets of safety straps is fixedly connected to the armrest frame, and the other end is matched through an insertion interface; the safety straps are elastic straps, and the two sets of safety straps can be tightened on the driver after being plugged in.

5. A large-scale mining safety lifting system according to claim 4, characterized in that: A second pressure sensor is provided at the connection between the two groups of mounting straps and the handrail frame. When the pressure detected by the second pressure sensor exceeds a second set value, the controller controls the transmission mechanism to stop the action.

6. A large-scale mining safety lifting system according to claim 3, characterized in that: The device also includes a speaker, which is connected to the controller and is used for issuing voice reminders.

7. A large-scale mining safety lifting system according to claim 5, characterized in that: When the first pressure sensor does not detect pressure and the pressure detected by two groups of second pressure sensors is less than the third set value, or when the pressure detected by the first pressure sensor is greater than the first set value and the pressure detected by two groups of second pressure sensors is greater than the third set value and less than the second set value, the controller can control the lifting frame to move up and down; the third set value is less than the second set value.

8. A large-scale mining safety lifting system according to claim 7, characterized in that: The guide rails on both sides of the lifting frame cooperate with the chain through the upper sprocket and the lower sprocket. The two sides of the lifting frame are fixedly connected to the chain on one side of the sprocket through the pedal connecting plate. The two sets of upper sprockets are connected by a transmission shaft with a bevel gear. The transmission shaft cooperates with the output end of the motor to realize the chain driving the pedal to rise and fall.

9. A working method of a large-scale mining safety lifting system, characterized in that: The safe lifting system according to any one of claims 5 comprises the following steps: The driver stands on the pedal and fastens the safety belt, and sends a lifting request through the up key or the down key. When the pressure detected by the first pressure sensor is greater than the first set value, and the pressure detected by the two groups of second pressure sensors is less than the second set value and greater than the third set value, the up key and the down key can be used to send instructions to the controller. The controller determines that it is a lifting instruction by someone, and the controller can control the transmission mechanism to drive the lifting frame to move up and down. When the first position sensor signal is connected, the lifting frame rises to the top end of the guide rail and the lifting frame stops lifting; when the second position sensor signal is connected, the lifting frame drops to the bottom end of the guide rail and the lifting frame stops lifting.

10. A working method of a large-scale mining safety lifting system according to claim 9, characterized in that: When the first pressure sensor detects no pressure and the pressure detected by the two groups of second pressure sensors is less than the third set value, an instruction is sent to the controller through the up button and the down button. The controller determines that it is an unmanned lifting instruction and can control the transmission mechanism to drive the lifting frame to rise and fall.

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