All-digital rope guard

Abstract

The present application relates to the technical field of slack rope protection, and more particularly to a full-digital slack rope protection device, comprising: two sets of magneto-encoders, respectively installed on a crown wheel and a hoist, for real-time detection of the running pulses of the crown wheel and the hoist; a PLC, installed inside a control cabinet of the hoist, the pulse data of the crown wheel and the hoist of the magneto-encoders being received by the PLC through transmission lines, and the running speeds of the two being obtained through PLC program calculation and analysis, so as to judge whether slack rope occurs according to the speed comparison; a control screen, installed in a driver control room, for real-time display of the speed values of the crown wheel and the hoist, and recording of the number of times of slack rope occurrence, to provide data for subsequent equipment maintenance and fault analysis; and an emergency processing unit; through the setting of the magneto-encoders, the device eliminates the disadvantages of traditional mechanical slack rope protection devices, such as insensitivity and unreliability, and fundamentally avoids slack rope accidents caused by defects of mechanical devices.

Description

Technical Field

[0001] This invention relates to the field of slack rope protection, and more particularly to a fully digital slack rope protection device. Background Technology

[0002] Slack rope protection is one of the "Ten Protections" of hoisting devices. Article 74 of the "Coal Mine Safety Regulations" (2022) stipulates that when using bucket hoisting during shaft construction, the following regulations shall be observed: the slack rope protection device of the hoist shall be connected to the alarm circuit; Article 423 stipulates that the hoisting device must be equipped with safety protection according to the following requirements: the winding hoist shall be equipped with a slack rope protection device and connected to the safety circuit or alarm circuit. When using skip hoisting, after the slack rope protection device is activated, it is strictly forbidden to release coal from the coal bunker. During use, slack rope protection devices have been found to malfunction when the wire rope gets stuck, failing to alarm or brake in time, resulting in frequent "squatting" or rope breakage accidents. In order to solve the problems of insensitivity and unreliability of traditional slack rope protection devices, it is urgent to develop a more advanced, safer, and more reliable slack rope protection device.

[0003] The slack rope protection device currently in use is a mechanical limit switch in conjunction with a pull wire. This has problems such as difficulty in setting the pull wire height, inadequate maintenance and damage or failure of the limit switch, and unreliable and insensitive slack rope protection action. When the hoist is lowered to remove waste rock and then raised again, the slack rope protection may malfunction, affecting continuous hoisting and transportation. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a fully digital slack rope protection device.

[0005] In a first aspect, the present invention provides a fully digital slack rope protection device, comprising:

[0006] Two sets of magneto-electric encoders are installed on the sheave and the hoist respectively, and are used to detect the running pulses of the sheave and the hoist in real time;

[0007] The PLC is installed inside the control cabinet of the hoist. The pulse data of the magneto-electric encoder sheave and the hoist are received by the PLC through the transmission line. After calculation and analysis by the PLC program, the running speed of the two is obtained, and the speed comparison is used to determine whether the rope has become slack.

[0008] The control panel, installed in the driver's control room, is used to display the speed values ​​of the sheave and hoist in real time, and record the number of times the rope slack occurs, providing data for subsequent equipment maintenance and fault analysis;

[0009] An emergency handling unit is installed at the bottom of the hoist and is used to perform emergency braking on the hoist within a short time when the PLC detects that the rope is slack. When the PLC detects that the rope slack phenomenon has occurred, the emergency handling unit is activated.

[0010] The magnetic electric encoder model can be selected as M-E I S38F, the temperature for use is -40℃-75℃, the protection level is IP67 (completely no dust enters, prevent short time immersion), the performance is obvious, can be applicable to more severe environment, can detect the running pulse number of the head sheave and the hoist in real time;

[0011] The PLC model can be selected as H3U-1616MT, the pulse number of the head sheave and the hoist is received by the PLC through the transmission line, the running speed of the two is obtained through the PLC program calculation and analysis;

[0012] The control screen model can be selected as TPC1530, the speed value of the head sheave and the hoist can be displayed in real time through the control screen picture, and the number of times of the rope loosening phenomenon is recorded, which provides important data for subsequent equipment maintenance and fault analysis;

[0013] The magnetic electric encoder is adopted, the running speed pulse of the hoist and the head sheave can be collected in real time, the speed value of the two is calculated and compared through the PLC program, whether the rope loosening phenomenon occurs is judged, the disadvantages of the traditional mechanical rope loosening protection device, such as not sensitive and unreliable, are abandoned, and the rope loosening accident caused by the defects of the mechanical device is fundamentally avoided;

[0014] The intelligent display and alarm function is provided, the speed value of the hoist and the head sheave is displayed in real time through the control screen, the operation personnel and the maintenance personnel can master the equipment running state in real time, when the rope loosening phenomenon is detected, the system will immediately give voice fault alarm, remind the hoist driver to stop quickly and carry out emergency treatment, or disconnect the safety circuit and start the emergency brake, ensure the safety of personnel and equipment, and record the number of times of the rope loosening phenomenon, which provides important data for subsequent equipment maintenance and fault analysis;

[0015] The complex situation in actual operation is fully considered, the normal relaxation of the steel wire rope such as the upward lifting after the gangue discharge and the hook dismounting is intelligently avoided, the false action and false alarm caused by these situations are effectively avoided, the normal operation of the hoist is greatly guaranteed, unnecessary parking and treatment process are avoided, the hoisting efficiency is significantly improved, and the operation cost is reduced.

[0016] Preferably, it further comprises:

[0017] The PLC compares the running speed of the head sheave and the hoist, when the speed of the head sheave is 0 and the speed of the hoist is not 0, it is judged that the rope loosening phenomenon occurs;

[0018] When the rope loosening phenomenon occurs, after the set delay, the fault output is carried out through the voice alarm and the sound and light alarm respectively, and the safety circuit is controlled to be cut off;

[0019] The pulse number of the head sheave and the hoist is received by the PLC through the transmission line, and the running speed of the two is obtained through the PLC program calculation and analysis, and the speed comparison is carried out. When the rope loosening phenomenon occurs, after setting the delay, the fault output is carried out, and the voice, sound and light alarm functions are also realized. The safety circuit can be cut off to realize emergency braking.

[0020] Preferably, the emergency processing unit comprises:

[0021] The brake box is arranged below the hoist.

[0022] The buffer assembly is installed at the upper and lower ends of the brake box, and is used to reduce the shock force generated during braking and to buffer the impact on the inside of the brake box caused by the landing of the hoist.

[0023] The four brake plates are arranged on the four sides of the hoist and are installed in the interior of the shaft.

[0024] The four friction plates are installed on the four sides of the brake box and are used to generate friction by pressing the brake plates to brake the hoist.

[0025] The pushing assembly is installed in the interior of the brake box and is used to amplify the pushing speed of the friction plates when hydraulic pushing is performed to quickly push the friction plates to press the brake plates for emergency braking, and then to stably support and push the friction plates.

[0026] When the rope loosening occurs, the PLC controls the emergency processing unit to start, i.e. to control the pushing assembly to start. After the pushing assembly starts, the friction plates are pushed. In the first stage, the pushing distance of the pushing assembly is amplified, so that the pushing assembly quickly pushes the friction plates to extend, so that the friction plates press the brake plates. When the hoist falls, the friction force generated by the friction plates pressing the brake plates can be used for emergency braking. In the second stage, after the first stage ends, the pushing distance amplification part of the pushing assembly is positioned, and then the pushing assembly continues to push until the friction plates are stably supported, so that the friction plates can be stably supported when they are pushed to press the brake plates, avoiding damage to the support of the friction plates under the action of resistance and affecting the braking effect, thereby facilitating the improvement of the timeliness and stability of the braking effect.

[0027] The setting of the buffer assembly allows the pushing assembly to push the friction plates to press the brake plates for braking, and buffers the impact and vibration generated during braking, thereby slowing down the transmission of vibration to the interior of the hoist, which is conducive to improving the stability of the hoist during braking and avoiding damage to the goods in the hoist or injury to the personnel.

[0028] Preferably, the buffer assembly comprises:

[0029] Two telescopic frames are respectively fixed to the upper and lower ends of the brake box;

[0030] Two fixed plates are respectively fixed to the opposite ends of the two telescopic frames, and the fixed plate at the top of the telescopic frame is fixedly connected to the bottom of the elevator;

[0031] A plurality of buffer springs are divided into two groups, and the two groups of buffer springs are respectively fixed between the fixed plates and the telescopic frames;

[0032] The upper telescopic frame is fixedly connected between the elevator and the brake box, and when the brake box generates impact vibration during braking, the elastic buffering effect of the buffer spring is used to slow down the transmission of the vibration to the inside of the elevator;

[0033] When the lower telescopic frame falls to the bottom, the fixed plate at the bottom contacts the ground, and at this time the impact vibration with the ground is buffered by the buffer spring, thereby facilitating the avoidance of the transmission of the vibration to the inside of the brake box, thereby avoiding the damage to the equipment inside the brake box.

[0034] Preferably, the pushing assembly comprises:

[0035] A hydraulic station is fixedly arranged at the center of the inside of the brake box;

[0036] Four first pushing rods are arranged on the four sides of the hydraulic station and are respectively used to push the four friction plates to extrude the four brake plates;

[0037] Four acceleration mechanisms are respectively arranged between the four first pushing rods and the friction plates, and are used to double the moving distance of the first pushing rod before the first pushing rod pushes the friction plate to reach the extrusion braking position, so as to advance the friction plate to reach the extrusion braking position;

[0038] The hydraulic station pushes the first pushing rod to move, the first pushing rod pushes the acceleration mechanism, so that the acceleration mechanism quickly reacts, doubles the moving distance of the first pushing rod before the first pushing rod pushes the friction plate to reach the extrusion braking position, and advances the friction plate to reach the extrusion braking position, thereby realizing the quick pushing reaction of the friction plate;

[0039] After the friction plate is pushed to reach the extrusion braking position, the hydraulic station continues to push the first pushing rod to move, at this time the acceleration mechanism is positioned and separated from the first pushing rod, and then the first pushing rod moves to support the friction plate, thereby stably supporting the friction plate which has reached the extrusion braking position.

[0040] Preferably, it further comprises:

[0041] Four support frames are respectively slidably inserted into the four sides of the inside of the brake box;

[0042] Four first installation slots are respectively arranged in the interiors of the four support frames, and the four friction plates are respectively detachably fixed in the interiors of the four first installation slots;

[0043] Four pressure sensors are respectively fixed in the interiors of the four first installation slots, and the friction plates extrude the pressure sensors when being pressed;

[0044] The support frame installs the friction plate through the first installation slot, when the friction plate reaches the extrusion braking position and extrudes the brake plate, the pressure sensor is pressed, the extrusion pressure between the friction plate and the brake plate can be detected through the pressure detected by the pressure sensor, so that after the extrusion pressure is detected, the hydraulic station can further push the first push rod to push the friction plate to move to the replacement position after the friction plate is worn, thereby avoiding the situation that the friction force for braking is reduced after the friction plate is worn, the braking effect is weakened, and the safety hidden danger is caused.

[0045] Preferably, the acceleration mechanism comprises:

[0046] Two groups of sliding blocks, two sliding blocks in a group are symmetrically arranged above and below, and two sliding blocks in a group are symmetrically arranged above and below, and are slidably installed on the side wall of the support frame through a sliding groove;

[0047] Four first rotating sleeves are respectively fixed in the interiors of the four sliding blocks;

[0048] Two rotating shafts are fixed in the interior of the brake box;

[0049] Four second push rods are respectively rotatably connected to one end of the four first rotating sleeves, and rotatably sleeved to the other end of the adjacent rotating shafts through second rotating sleeves;

[0050] Four third push rods are respectively fixedly connected to the four second rotating sleeves through rotating rings;

[0051] The second push rod and the third push rod are arranged in a staggered manner;

[0052] A push frame is arranged outside the first push rod, and the first push rod drives the push frame to move when the first push rod moves;

[0053] The first push rod moves to drive the push frame to move, the push frame moves to drive the third push rod, so that the third push rod drives the rotating ring to rotate, the rotating ring drives the second rotating sleeve to rotate, the second rotating sleeve drives the second push rod to rotate around the rotating shaft, the length of the second push rod at both ends of the rotating shaft is different, so that when the third push rod is pushed for a short distance, the second push rod is driven to overturn the same angle, and at this time, the end of the second push rod moves a long distance, so that the support frame can be pushed to move a long distance when the first push rod just moves, so as to push the friction plate to quickly reach the extrusion braking position between the brake pads to generate extrusion, thereby facilitating to improve the timeliness of the braking process.

[0054] Preferably, the acceleration mechanism further comprises:

[0055] The clamping block is fixed on the inner wall of the through hole in the center of the push frame;

[0056] The clamping groove is arranged on the outside of the first push rod;

[0057] The edges of the clamping block and the clamping groove are both provided with a rounded corner;

[0058] The first push rod drives the clamping groove to move, the clamping groove drives the clamping block to move, and the clamping block drives the push frame to move, thereby driving the push frame to move, when the push frame indirectly pushes the friction plate to reach the specified position, the push frame cannot continue to push, at this time, when the first push rod continues to move, the clamping block and the clamping groove are separated under the action of the rigidity, so that the first push rod can continue to move to stably support the friction plate.

[0059] Preferably, the acceleration mechanism further comprises:

[0060] Two second installation grooves are symmetrically arranged on the top and bottom of the push frame;

[0061] Two limiting blocks are respectively and slidably arranged in the two second installation grooves, and a spring is arranged between the limiting block and the inner wall of the second installation groove;

[0062] Two limiting grooves are respectively arranged on the top and bottom of the inner wall of the brake box, when the friction plate is pushed to reach the extrusion braking position, the push frame drives the limiting block to reach the position of the limiting groove;

[0063] Two blocking blocks are respectively fixed on the edges of the two limiting grooves away from the hydraulic station;

[0064] When the pushing frame moves to the position of the limiting groove, the limiting block is aligned with the limiting groove, at this time, the spring pushes the limiting block to move and insert into the inside of the limiting groove, thereby limiting the pushing frame, the blocking block can block the position of the pushing frame, and the pushing frame will not continue to move when moving to align with the limiting groove, thereby facilitating to improve the accuracy of the limiting block and the limiting groove.

[0065] Preferably, the acceleration mechanism further comprises:

[0066] The fixed block is fixed on the side wall of the support frame;

[0067] The limiting ring is fixed on the outer wall of the fixed block;

[0068] The clamping end is fixed on the end of the first pushing rod;

[0069] The inner groove is arranged on the side wall of the clamping end;

[0070] The annular groove is fixed in the inner groove;

[0071] The first pushing rod drives the clamping end to move towards the fixed block, so that the fixed block is inserted into the inner groove, thereby making the annular groove and the limiting ring clamped and adapted to be clamped, so that the first pushing rod is connected with the support frame to stably support the friction plate.

[0072] Compared with the prior art, the present application has the following beneficial effects:

[0073] 1、The present application discards the disadvantages of traditional mechanical rope loosening protection device, such as insensitivity and unreliability, and fundamentally avoids the rope loosening accidents caused by mechanical device defects through the setting of the magneto-encoder;

[0074] 2、The present application sets the emergency treatment unit, so that the pushing distance of the pushing assembly is enlarged, the friction plate is pushed to the extrusion braking position in advance, thereby realizing the rapid pushing reaction of the friction plate, and thereby facilitating to improve the timeliness and stability of the braking effect; BRIEF DESCRIPTION OF DRAWINGS

[0075] Figure 1 It is a schematic diagram of the principle of the present application.

[0076] Figure 2 It is a schematic diagram of the overall structure of the present application.

[0077] Figure 3 It is a schematic diagram of the structure of the emergency treatment unit after sectioning.

[0078] Figure 4 It is a schematic diagram of the Figure 3 Enlarged structure diagram of A in the present application.

[0079] Figure 5This is a schematic diagram of the internal structure of the brake box of the present invention.

[0080] Figure 6 For the present invention Figure 5 A magnified structural diagram at point B in the middle.

[0081] In the diagram: 1. Hoist; 2. Brake box; 3. Fixed plate; 301. Telescopic frame; 302. Buffer spring; 4. Friction plate; 401. Support frame; 402. First mounting slot; 403. Pressure sensor; 5. Hydraulic station; 501. First push rod; 6. Push frame; 601. Second mounting slot; 602. Limit block; 603. Limit slot; 604. Locking block; 605. Locking slot; 606. Blocking block; 7. Slider; 701. Slide groove; 702. First rotating sleeve; 703. Second push rod; 704. Rotating shaft; 705. Second rotating sleeve; 706. Rotating ring; 707. Third push rod; 8. Fixed block; 801. Limit ring; 802. Locking end; 803. Inner groove; 804. Annular groove. Detailed Implementation

[0082] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0083] like Figures 1 to 5 The fully digital slack rope protection device shown includes:

[0084] Two sets of magneto-electric encoders are installed on the sheave and hoist 1 respectively, and are used to detect the running pulses of the sheave and hoist 1 in real time;

[0085] The PLC is installed inside the control cabinet of hoist 1. The pulse data of the magneto-electric encoder sheave and hoist 1 are received by the PLC through the transmission line. After calculation and analysis by the PLC program, the running speed of the two is obtained, and the speed comparison is used to determine whether the rope has become slack.

[0086] The control panel, installed in the driver's control room, is used to display the speed values ​​of the sheave and hoist 1 in real time, and record the number of times the rope slack occurs, providing data for subsequent equipment maintenance and fault analysis;

[0087] An emergency handling unit is installed at the bottom of the hoist 1. It is used to perform emergency braking on the hoist 1 in a short time when the PLC detects that the rope is slack. When the PLC detects that the rope is slack, it controls the emergency handling unit to start.

[0088] The rope slack protection device used at present is a mechanical stroke switch matched with a pull wire, which has the problems of difficult setting of the pull wire height, damage and failure of the stroke switch due to imperfect maintenance, unreliable and insensitive rope slack protection action, and the problem of continuous hoisting transportation affected by the false action of the rope slack protection due to the downward discharge of the gangue and the upward lifting after the discharge of the gangue;

[0089] The embodiment of the application can solve the above problems, and the specific implementation is as follows: the magnetic encoder model can be selected as M-E I S38F, the use temperature is-40℃-75℃, the protection level is IP67 (completely dust-free and short-time water immersion), the performance is remarkable, can be applied to a relatively harsh environment, and can detect the running pulse number of the head sheave and the hoist 1 in real time;

[0090] The PLC model can be selected as H3U-1616MT, the pulse number of the head sheave and the hoist 1 is received by the PLC through the transmission line, and the running speed of the two is obtained through PLC program calculation and analysis;

[0091] The control screen model can be selected as TPC1530, the speed value of the head sheave and the hoist 1 can be displayed in real time through the control screen picture, and the number of rope slack phenomenon occurrences is recorded, which provides important data for subsequent equipment maintenance and fault analysis;

[0092] The magnetic encoder is adopted, the running speed pulse of the hoist 1 and the head sheave can be collected in real time, the speed value of the two is calculated and compared through the PLC program, whether the rope slack phenomenon occurs is judged, the disadvantages of the traditional mechanical rope slack protection device, such as insensitivity and unreliability, are abandoned, and the rope slack accident caused by the defects of the mechanical device is fundamentally avoided;

[0093] The intelligent display and alarm function is provided, the speed value of the hoist 1 and the head sheave is displayed in real time through the control screen, the operating personnel and the maintenance personnel can master the equipment running state in real time, when the rope slack phenomenon is detected, the system will immediately give a voice fault alarm, remind the hoist driver to stop quickly and perform emergency treatment, or disconnect the safety circuit and start the emergency brake, ensure the safety of personnel and equipment, and record the number of rope slack phenomenon occurrences, which provides important data for subsequent equipment maintenance and fault analysis;

[0094] The complex situation in actual operation is fully considered, the normal slackening of the steel wire rope such as the upward lifting after the discharge of the gangue and the upward lifting after unhooking is intelligently avoided, the false action and false alarm caused by these situations are effectively avoided, the normal operation of the hoist is greatly ensured, unnecessary parking and processing procedures are avoided, the hoisting efficiency is significantly improved, and the operation cost is reduced.

[0095] As an optional embodiment, it further comprises:

[0096] The PLC compares the running speed of the head sheave and the hoist 1. When the speed of the head sheave is 0 and the speed of the hoist is not 0, it is determined that the rope is loose.

[0097] When the rope is loose, after a set delay, the fault is output through voice alarm and sound-light alarm, and the safety circuit is cut off.

[0098] The pulse numbers of the head sheave and the hoist 1 are received by the PLC through the transmission line. After calculation and analysis by the PLC program, the running speeds of the two are obtained, and the speed comparison is performed. When the rope is loose, after a set delay, the fault is output, with voice, sound-light alarm function, and the safety circuit can be cut off to achieve emergency braking.

[0099] As an optional embodiment, the emergency processing unit comprises:

[0100] The brake box 2 is arranged below the hoist 1.

[0101] The buffer assembly is installed at the upper and lower ends of the brake box 2, and is used to reduce the vibration disturbance of the impact force generated during braking on the hoist 1, and to buffer the impact caused by the hoist 1 falling on the inside of the brake box 2.

[0102] The four brake plates are arranged on the four sides of the hoist 1 and are installed inside the shaft.

[0103] The four friction plates 4 are installed on the four sides of the brake box 2, and are used to generate friction by pressing the brake plates to brake the hoist 1.

[0104] The pushing assembly is installed inside the brake box 2, and is used to amplify the pushing speed of the friction plate 4 when pushed by hydraulic pressure, so as to quickly push the friction plate 4 to press the brake plate for emergency braking, and then stably support and push the friction plate 4.

[0105] When the rope is loose, the PLC controls the emergency processing unit to start, i.e. controls the pushing assembly to start. After the pushing assembly starts, the friction plate 4 is pushed. In the first stage, the pushing distance of the pushing assembly is amplified, so that the pushing assembly quickly pushes the friction plate 4 to extend, so that the friction plate 4 presses the brake plate. When the hoist 1 falls, the friction force generated by the friction plate 4 pressing the brake plate can be used for emergency braking. In the second stage, after the first stage ends, the pushing distance of the pushing assembly is amplified by the structure positioning part, and then the pushing assembly continues to push until the friction plate 4 is stably supported. Therefore, when the friction plate 4 is pushed and pressed, it can be stably supported, avoiding damage to the support of the friction plate 4 under the action of resistance and affecting the braking effect, thereby facilitating the timeliness and stability of the braking effect.

[0106] The buffer assembly is arranged so that when the pushing assembly pushes the friction plate 4 to press the brake plate to brake, the impact vibration generated during braking is buffered, thereby slowing down the transmission of vibration to the inside of the elevator 1, which helps to improve the stability of the elevator 1 during braking and helps to avoid damage to goods or injury to personnel inside the elevator 1.

[0107] As an optional embodiment, the buffer assembly comprises:

[0108] Two telescopic frames 301 are respectively fixed to the upper and lower ends of the brake box 2;

[0109] Two fixed plates 3 are respectively fixed to the opposite ends of the two telescopic frames 301, and the fixed plate 3 at the top of the upper telescopic frame 301 is fixedly connected to the bottom of the elevator 1;

[0110] A plurality of buffer springs 302 are divided into two groups, and the two groups of buffer springs 302 are respectively fixed between the fixed plates 3 and the telescopic frames 301;

[0111] The upper telescopic frame 301 is fixedly connected between the elevator 1 and the brake box 2, and when the brake box 2 generates impact vibration during braking, the elastic buffering action of the buffer spring 302 slows down the transmission of vibration to the inside of the elevator 1;

[0112] When the lower telescopic frame 301 falls to the bottom of the elevator 1, the bottom fixed plate 3 contacts the ground, and at this time the impact vibration with the ground is buffered by the buffer spring 302, thereby helping to avoid transmitting the vibration to the inside of the brake box 2, causing damage to the equipment inside the brake box 2.

[0113] As an optional embodiment, the pushing assembly comprises:

[0114] A hydraulic station 5 is fixedly arranged at the inside center of the brake box 2;

[0115] Four first pushing rods 501 are arranged on the four sides of the hydraulic station 5 and are respectively used to push the four friction plates 4 to press the four brake plates;

[0116] Four acceleration mechanisms are respectively installed between the four first pushing rods 501 and the friction plates 4, and are used to double the movement distance of the first pushing rod 501 before the first pushing rod 501 pushes the friction plate 4 to reach the pressing brake position, so as to advance the friction plate 4 to reach the pressing brake position;

[0117] The hydraulic station 5 pushes the first push rod 501 to move, the first push rod 501 pushes the rear push acceleration mechanism, so that the acceleration mechanism reacts quickly, the moving distance of the first push rod 501 is doubled before the first push rod 501 pushes the friction plate 4 to reach the extrusion braking position, the friction plate 4 is pushed to reach the extrusion braking position in advance, so that the friction plate 4 is quickly pushed and reacts;

[0118] After the friction plate 4 is pushed to reach the extrusion braking position, the hydraulic station 5 continues to push the first push rod 501 to move, at this time the acceleration mechanism is positioned and is separated from the first push rod 501, and the first push rod 501 is then moved to support the friction plate 4, thereby stably supporting the friction plate 4 which has reached the extrusion braking position.

[0119] As an optional embodiment, it also includes:

[0120] Four support frames 401 are respectively slidably inserted into four sides inside the brake box 2;

[0121] Four first installation grooves 402 are respectively formed in the interiors of the four support frames 401, and the four friction plates 4 are respectively detachably and fixedly installed in the interiors of the four first installation grooves 402;

[0122] Four pressure sensors 403 are respectively fixedly installed in the interiors of the four first installation grooves 402, and the friction plate 4 extrudes the pressure sensor 403 when being pressed;

[0123] The support frame 401 installs the friction plate 4 through the first installation groove 402, when the friction plate 4 reaches the extrusion braking position and extrusion occurs between the friction plate 4 and the brake sheet, the pressure sensor 403 is pressed, and the extrusion pressure between the friction plate 4 and the brake sheet can be detected through the pressure detected by the pressure sensor 403, so that after the extrusion pressure is detected, the hydraulic station 5 can be further pushed by the first push rod 501 to push the friction plate 4 to move to the position after the friction plate 4 is worn, thereby avoiding the situation that the friction force for braking is reduced after the friction plate 4 is worn, the braking effect is weakened, and a safety hazard occurs.

[0124] As an optional embodiment, the acceleration mechanism includes:

[0125] Two groups of sliding blocks 7 are symmetrically arranged above and below, and the two sliding blocks 7 in the same group are a group, and are slidably installed on the side wall of the support frame 401 through the sliding groove 701;

[0126] Four first rotating sleeves 702 are respectively fixed in the interiors of the four sliding blocks 7;

[0127] Two rotating shafts 704 are fixed in the interior of the brake box 2;

[0128] Four second pushing rods 703, one end of each of which is rotatably connected with the four first rotating sleeves 702, and the other end of each of which is rotatably sleeved on the outside of the adjacent rotating shaft 704 through the second rotating sleeve 705;

[0129] Four third pushing rods 707 are fixedly connected with the four second rotating sleeves 705 through the rotating ring 706;

[0130] The second pushing rods 703 and the third pushing rods 707 are arranged in a staggered manner;

[0131] A pushing frame 6 is arranged on the outside of the first pushing rod 501, and the first pushing rod 501 moves to drive the pushing frame 6 to move;

[0132] The first pushing rod 501 moves to drive the pushing frame 6 to move, the pushing frame 6 moves to drive the third pushing rod 707, so that the third pushing rod 707 drives the rotating ring 706 to rotate, the rotating ring 706 drives the second rotating sleeve 705 to rotate, the second rotating sleeve 705 drives the second pushing rod 703 to rotate around the rotating shaft 704, and the lengths of the second pushing rod 703 at both ends of the rotating shaft 704 are different, so that when the third pushing rod 707 is pushed for a short distance, the second pushing rod 703 is driven to overturn by the same angle, and at this time, the end of the second pushing rod 703 moves a long distance, so that the support frame 401 can be pushed to move a long distance when the first pushing rod 501 just moves, to push the friction plate 4 to quickly reach the extrusion between the brake plate and the brake plate, thereby facilitating the reaction and timeliness of the braking process.

[0133] As an optional embodiment, the acceleration mechanism further comprises:

[0134] A clamping block 604 is fixed on the inner wall of the through hole in the center of the pushing frame 6;

[0135] A clamping groove 605 is arranged on the outside of the first pushing rod 501;

[0136] The edges of the clamping block 604 and the clamping groove 605 are both arranged as a round corner;

[0137] The first pushing rod 501 drives the clamping groove 605 to move, the clamping groove 605 drives the clamping block 604 to move, and the clamping block 604 drives the pushing frame 6 to move, thereby driving the pushing frame 6 to move, and when the pushing frame 6 indirectly pushes the friction plate 4 to reach the designated position, the pushing frame 6 cannot continue to push, and at this time, when the first pushing rod 501 continues to move, the clamping block 604 and the clamping groove 605 are separated under the action of the rigidity, so that the first pushing rod 501 can continue to move to stably support the friction plate 4.

[0138] As an optional embodiment, the acceleration mechanism further comprises:

[0139] Two second installation grooves 601 are symmetrically arranged on the top and bottom of the pushing frame 6;

[0140] Two limiting blocks 602 are respectively and slidingly arranged in the second installation grooves 601, and springs are fixed between the limiting blocks 602 and the inner walls of the second installation grooves 601;

[0141] Two limiting grooves 603 are respectively arranged on the top and bottom of the inner wall of the brake box 2, and when the friction plate 4 is pushed to the extrusion braking position, the pushing frame 6 drives the limiting blocks 602 to the positions of the limiting grooves 603;

[0142] Two blocking blocks 606 are respectively fixed to the edges of the limiting grooves 603 away from the hydraulic station 5;

[0143] When the pushing frame 6 moves to the positions of the limiting grooves 603, the limiting blocks 602 are aligned with the limiting grooves 603, at this time, the springs push the limiting blocks 602 to move and be inserted into the limiting grooves 603, so as to limit the pushing frame 6, and the blocking blocks 606 can block the position of the pushing frame 6, so that the pushing frame 6 cannot continue to move when it is aligned with the limiting grooves 603, thereby facilitating the accuracy of the limiting blocks 602 and the limiting grooves 603.

[0144] As an optional embodiment, the acceleration mechanism further comprises:

[0145] A fixed block 8 is fixed to the side wall of the support frame 401;

[0146] A limiting ring 801 is fixed to the outer wall of the fixed block 8;

[0147] A clamping end 802 is fixed to the end of the first pushing rod 501;

[0148] An inner groove 803 is arranged on the side wall of the clamping end 802;

[0149] An annular groove 804 is fixed in the inner groove 803;

[0150] The first pushing rod 501 drives the clamping end 802 to move towards the fixed block 8, so that the fixed block 8 is inserted into the inner groove 803, so that the annular groove 804 is clamped and matched with the limiting ring 801 to be clamped, so that the first pushing rod 501 is connected with the support frame 401 to stably support the friction plate 4.

[0151] The working principle of the application is that the magnetic encoder type can be selected as M-E I S38F, the use temperature is-40℃-75℃, the protection level is IP67 (completely no dust enters, prevent short-time immersion), the performance is remarkable, can be applied to a relatively harsh environment, and can detect the running pulse number of the headstock and the elevator 1 in real time;

[0152] The model of the PLC can be H3U-1616MT, the pulse numbers of the crown and the hoist 1 are received by the PLC through the transmission line, the running speeds of the two are obtained through the PLC program calculation and analysis;

[0153] The model of the control screen can be TPC1530, the speed values of the crown and the hoist 1 can be displayed in real time through the control screen picture, and the occurrence frequency of the rope loosening phenomenon is recorded, which provides important data for subsequent equipment maintenance and fault analysis;

[0154] The magneto-encoder is adopted, the running speed pulses of the hoist 1 and the crown can be collected in real time, the speed values of the two are calculated and compared through the PLC program, whether the rope loosening phenomenon occurs is judged, the disadvantages of the traditional mechanical rope loosening protection device, such as insensitivity and unreliability, are abandoned, and the rope loosening accidents caused by the defects of the mechanical device are fundamentally avoided;

[0155] The intelligent display and alarm functions are provided, the speed values of the hoist 1 and the crown are displayed in real time through the control screen, the operating personnel and the maintenance personnel can master the equipment running state in real time, when the rope loosening phenomenon is detected, the system will immediately give a voice fault alarm, the hoist driver is reminded to stop quickly and perform emergency treatment, or the safety circuit is disconnected, the emergency brake is started, the safety of the personnel and the equipment is ensured, and the occurrence frequency of the rope loosening phenomenon is recorded, which provides important data for subsequent equipment maintenance and fault analysis;

[0156] The complex situations in actual operation are fully considered, the normal rope loosening situations such as the upward lifting after the gangue discharge and the upward lifting after the hook dismounting can be intelligently avoided, the false actions and false alarms caused by these situations are effectively avoided, the normal operation of the hoist is greatly guaranteed, unnecessary parking and treatment processes are avoided, the hoisting efficiency is significantly improved, and the operation cost is reduced.

[0157] The above shows and describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, the above embodiments and descriptions in the specification are only the principles of the present application, various changes and improvements of the present application can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application.

Claims

1. A fully digital rope guard characterized in that, The utility model relates to a kind of emergency braking device of mine hoist, including: Two sets of magneto-encoder are installed on head sheave and elevator (1) respectively, for real-time detection of the running pulse of head sheave and elevator (1); PLC is installed in the control cabinet of elevator (1), and the pulse data of the magneto-encoder of head sheave and elevator (1) is received by the PLC through the transmission line, and the running speed of the two is obtained by the PLC program calculation and analysis, to judge whether the rope is loose according to the speed comparison; Control screen is installed in the driver control room, for real-time display of the speed value of head sheave and elevator (1), and records the number of times of rope loosening, providing data for subsequent equipment maintenance and fault analysis; Emergency processing unit is installed at the bottom of the elevator (1), for emergency braking of the elevator (1) in a short time when the PLC judges that the rope is loose, and the emergency processing unit is started when the PLC judges that the rope is loose. The emergency processing unit includes: Brake box (2) is arranged below the elevator (1); Buffer assembly is installed at the upper and lower ends of the brake box (2), for reducing the shock force generated during braking to the vibration interference of the elevator (1), and for buffering the impact caused by the landing of the elevator (1) to the inside of the brake box (2); Four brake plates are arranged on the four sides of the elevator (1) respectively and installed in the inside of the shaft; Four friction plates (4) are installed on the four sides of the brake box (2) respectively, for extruding the brake plates to generate friction to brake the elevator (1); Pushing assembly is installed in the inside of the brake box (2), for amplifying the pushing speed of the friction plate (4) when hydraulic pushing, to quickly push the friction plate (4) to extrude the brake plate for emergency braking, and then stably support and push the friction plate (4); The pushing assembly includes: Hydraulic station (5) is fixed at the center of the inside of the brake box (2); Four first pushing rods (501) are arranged on the four sides of the hydraulic station (5), respectively for pushing four friction plates (4) to extrude four brake plates; Four acceleration mechanisms are installed respectively between the first pushing rod (501) and the friction plate (4), for doubling the moving distance of the first pushing rod (501) before pushing the friction plate (4) to reach the extrusion braking position, to push the friction plate (4) to reach the extrusion braking position in advance; It also includes: Four support frames (401) are respectively slidably inserted into the four sides of the inside of the brake box (2); Four first mounting grooves (402) are respectively formed in the inside of the four support frames (401), and four friction plates (4) are respectively detachably fixed and installed in the inside of the four first mounting grooves (402); Four pressure sensors (403) are respectively fixed and installed in the inside of the four first mounting grooves (402), and the friction plate (4) extrudes the pressure sensor (403) when it is pressed; The acceleration mechanism includes: Two sets of sliders (7), the two sliders (7) are arranged symmetrically in the upper and lower parts of the same set, and the two sliders (7) in the same set are slidably installed on the side wall of the support frame (401) through the slide groove (701); Four first rotating sleeves (702) are respectively fixed inside the four sliders (7); Both rotating shafts (704) are fixed inside the brake box (2); Four second push rods (703) are respectively rotatably connected at one end to the four first rotating sleeves (702), and the other end is respectively rotatably sleeved on the outside of the adjacent rotating shaft (704) through the second rotating sleeve (705); Four third push rods (707) are fixedly connected to four second rotating sleeves (705) via rotating rings (706); The second push rod (703) and the third push rod (707) are both staggered with each other; The push frame (6) is located outside the first push rod (501), and the push frame (6) moves when the first push rod (501) moves.

2. The all-digital rope slip protection device of claim 1, wherein, Also includes: The PLC compares the running speed of the sheave and the hoist (1). When the speed of the sheave is 0 and the speed of the hoist is not 0, it determines that the rope is slack. When a slack rope occurs, after a set delay, a fault output will be issued through both voice and audible / visual alarms, and the safety circuit will be cut off.

3. The all-digital rope slip protection device of claim 1, wherein, The buffer component includes: Two telescopic frames (301) are fixed to the upper and lower ends of the brake box (2), respectively; Two fixing plates (3) are respectively fixed to the opposite ends of the two telescopic frames (301), and the fixing plate (3) at the top of the upper telescopic frame (301) is fixedly connected to the bottom of the hoist (1); Several buffer springs (302) are divided into two groups, and the two groups of buffer springs (302) are respectively fixed between the fixed plate (3) and the telescopic frame (301).

4. The all-digital rope slip protection device of claim 1, wherein, The acceleration mechanism also includes: The locking block (604) is fixed on the inner wall of the through hole in the center of the push frame (6); A slot (605) is formed on the outside of the first push rod (501); The edges of both the locking block (604) and the locking groove (605) are rounded.

5. The all-digital rope slip protection device of claim 1, wherein, The acceleration mechanism also includes: Two second mounting slots (601) are symmetrically opened at the top and bottom of the push frame (6); Two limiting blocks (602) are slidably inserted into the two second mounting slots (601), and springs are fixed between the limiting blocks (602) and the inner walls of the second mounting slots (601); Two limiting grooves (603) are respectively opened at the top and bottom of the inner wall of the brake box (2). When the friction plate (4) is pushed to the squeezing braking position, the push frame (6) drives the limiting block (602) to the position of the limiting groove (603). Two blocking blocks (606) are fixed to the side of the two limiting grooves (603) facing away from the hydraulic station (5).

6. The all-digital rope slip protection device of claim 1, wherein, The acceleration mechanism also includes: The fixing block (8) is fixed to the side wall of the support frame (401); A limiting ring (801) is fixed to the outer wall of the fixed block (8); A clamping end (802) is fixed to the end of the first push rod (501); An inner groove (803) is arranged on the side wall of the clamping end (802); An annular groove (804) is arranged in the inner groove (803).

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