All-digital rope loosening protection device

Abstract

The invention relates to the technical field of slack rope protection, in particular to an all-digital slack rope protection device, which comprises two sets of magnetoelectric encoders respectively mounted on a head sheave and an elevator and used for detecting operation pulses of the head sheave and the elevator in real time; the PLC is installed in a control cabinet of the elevator, pulse data of a head sheave of the magnetoelectric encoder and pulse data of the elevator are received by the PLC through a transmission line, the running speed of the head sheave and the running speed of the elevator are obtained through PLC program calculation and analysis, and whether rope loosening occurs or not is judged according to speed comparison; the control screen is installed in a driver control room and used for displaying the speed values of the head sheave and the elevator in real time, recording the occurrence frequency of the rope loosening phenomenon and providing data for follow-up equipment maintenance and fault analysis; an emergency processing unit; according to the device, through the arrangement of the magnetoelectric encoder, the defects that a traditional mechanical rope loosening protection device is insensitive and unreliable are overcome, and rope loosening accidents caused by the defects of a mechanical device are fundamentally avoided.

Description

Technical Field

[0001] The present invention relates to the field of loose rope protection, and particularly to a full-digital loose rope protection device. Background Art

[0002] Loose rope protection is one of the "ten major protections" of hoisting devices. Article 74 of the "Coal Mine Safety Regulations" (2022) stipulates that when a kibble hoist is used during shaft construction, the following provisions shall be observed: The loose rope protection device of the hoist shall be connected to the alarm circuit; Article 423 stipulates that hoisting devices must be equipped with safety protections as follows: The winding hoist shall be provided with a loose rope protection device and connected to the safety circuit or the alarm circuit. When a skip hoist is used, after the loose rope protection device operates, it is strictly prohibited to discharge coal from the coal receiving bunker. During the use of the loose rope protection device, there is a phenomenon that after the steel wire rope is stuck, the loose rope protection device fails and cannot give an alarm or brake in time, and "cage squatting" or rope breakage accidents occur frequently. In order to solve the problems of insensitivity and unreliability of traditional loose rope protection devices, it is urgent to develop a more advanced, safer and more reliable loose rope protection device.

[0003] At present, the loose rope protection device in use is a mechanical travel switch combined with a pull wire, which has problems such as difficult setting of the pull wire height, damage and failure of the travel switch due to improper maintenance, unreliable and insensitive loose rope protection actions, and false actions of the loose rope protection during the lowering and subsequent lifting of the hoist for waste rock discharge, which affect continuous hoisting and transportation. Summary of the Invention

[0004] The purpose of the present invention is to solve the disadvantages existing in the prior art, and a full-digital loose rope protection device is proposed.

[0005] In a first aspect, the present invention provides a full-digital loose rope protection device, including:

[0006] Two sets of magnetoelectric encoders are respectively installed on the head pulley and the hoist to detect the running pulses of the head pulley and the hoist in real time;

[0007] A PLC is installed inside the control cabinet of the hoist. The pulse data of the head pulley and the hoist of the magnetoelectric encoder are received by the PLC through a transmission line, and after being calculated and analyzed by the PLC program, the running speeds of the two are obtained to judge whether loose rope occurs according to the speed comparison;

[0008] A control panel is installed in the driver's control room to display the speed values of the head pulley and the hoist in real time and record the number of occurrences of loose rope phenomena, providing data for subsequent equipment maintenance and fault analysis;

[0009] An emergency treatment unit is installed at the bottom of the hoist. When the PLC judges loose rope, it performs emergency braking on the hoist within a short time, and when the PLC judges that loose rope occurs, it controls the emergency treatment unit to start;

[0010] The magnetoelectric encoder model can be selected as M-E I S38F, with an operating temperature of -40°C to 75°C and an IP67 protection level (completely dust-free and resistant to short-term immersion). It has remarkable performance and can be applied to relatively harsh environments. It can detect the running pulse counts of the skywheel and the hoist in real time.

[0011] The PLC model can be selected as H3U-1616MT. The pulse counts of the skywheel and the hoist are received by the PLC through transmission lines. After calculation and analysis by the PLC program, the running speeds of the two can be obtained.

[0012] The control panel model can be selected as TPC1530. The speed values of the skywheel and the hoist can be displayed in real time through the control panel screen, and the number of times of loose rope phenomena can be recorded, providing important data for subsequent equipment maintenance and fault analysis.

[0013] By adopting a magnetoelectric encoder, the running speed pulses of the hoist and the skywheel can be collected in real time. Through calculation by the PLC program and comparison of the speed values of the two, it can be judged whether a loose rope phenomenon occurs, eliminating the disadvantages of the traditional mechanical loose rope protection device being insensitive and unreliable, and fundamentally avoiding the occurrence of loose rope accidents caused by the defects of the mechanical device.

[0014] It has intelligent display and alarm functions. The speed values of the hoist and the skywheel are displayed in real time through the control panel, enabling operators and maintenance personnel to grasp the running state of the equipment in real time. When a loose rope phenomenon is detected, the system will immediately give a voice fault alarm, reminding the hoist driver to stop quickly and take emergency measures, or disconnect the safety circuit and activate emergency braking to ensure the safety of personnel and equipment. At the same time, the number of times of loose rope phenomena is recorded, providing important data for subsequent equipment maintenance and fault analysis.

[0015] Fully considering the complex situations in actual operation, it can intelligently avoid the normal relaxation of the steel wire rope such as when hoisting after discharging waste rock and hoisting after unhooking, effectively avoiding misoperations and false alarms caused by these situations, greatly ensuring the normal operation of the hoist, avoiding unnecessary stops and handling processes, significantly improving the hoisting efficiency, and reducing the operation cost.

[0016] Preferably, it further includes:

[0017] The PLC compares the running speeds of the skywheel and the hoist. When the speed of the skywheel is 0 and the speed of the hoist is not 0, it is judged that a loose rope phenomenon occurs.

[0018] When a loose rope phenomenon occurs, after a set delay, fault outputs are respectively carried out through voice alarm and audible and visual alarm, and the safety circuit is controlled to be cut off.

[0019] The pulse counts of the head sheave and the hoist are received by the PLC via a transmission line. After being calculated and analyzed by the PLC program, the running speeds of the two are obtained and compared. When the phenomenon of loose rope occurs, after a set delay, a fault output is made, which has functions of voice, sound and light alarm, and can also cut off the safety circuit to achieve emergency braking.

[0020] Preferably, the emergency treatment unit includes:

[0021] A brake box, arranged below the hoist;

[0022] A buffer assembly, installed at the upper and lower ends of the brake box, used to reduce the vibration interference of the hoist caused by the impact force generated during braking during the braking process, and used to buffer the impact on the inside of the brake box when the hoist lands;

[0023] Four brake plates, respectively arranged on the four sides of the hoist and installed inside the shaft;

[0024] Four friction plates, respectively installed on the four sides of the brake box, used to generate friction by squeezing with the brake plates to perform emergency braking on the hoist;

[0025] A pushing assembly, installed inside the brake box, used to amplify the pushing speed of the friction plate during hydraulic pushing, so as to quickly push the friction plate to squeeze the brake plate for emergency braking, and then stably support and push the friction plate;

[0026] When loose rope occurs, the PLC controls the start of the emergency treatment unit, that is, controls the start of the pushing assembly. After the pushing assembly starts, it pushes the friction plate. In the first stage, the pushing distance of the pushing assembly is amplified, so that the pushing assembly quickly pushes the friction plate to extend, so that the friction plate squeezes the brake plate. When the hoist falls, emergency braking can be performed through the frictional force generated by the friction plate squeezing the brake plate. In the second stage, after the first stage ends, the enlarged part of the pushing distance of the pushing assembly is positioned, and then the pushing assembly continues to push until the friction plate is stably supported, so that the friction plate can be stably supported when being pushed to squeeze the brake piece, avoiding damage to the support of the friction plate under the action of resistance and affecting the braking effect, thus being beneficial to improving the timeliness and stability of the braking effect;

[0027] The setting of the buffer assembly enables the pushing assembly to push the friction plate to squeeze the brake piece for braking, buffers the impact vibration generated during the braking process, thereby slowing down the transmission of the vibration to the inside of the hoist, being beneficial to improving the stability of the hoist during braking, and being beneficial to avoiding the situation of damage to the goods inside the hoist or injury to personnel.

[0028] Preferably, the buffer assembly includes:

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

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

[0031] A number of buffer springs, divided into two groups, and the two groups of buffer springs are respectively fixed between the fixing plate and the telescopic frame;

[0032] The upper telescopic frame is fixedly connected between the hoist and the braking box. When the braking box generates impact vibration during braking, through the elastic buffering effect of the buffer spring, the transmission of vibration into the hoist is slowed down;

[0033] When the lower telescopic frame reaches the bottommost position during the hoist's descent, the fixing plate at the bottom contacts the ground. At this time, the impact vibration with the ground is buffered by the buffer spring, which helps to avoid transmitting the vibration into the braking box and damaging the internal equipment of the braking box.

[0034] Preferably, the pushing assembly includes:

[0035] A hydraulic station, fixed at the central part inside the braking box;

[0036] Four first pushing rods, arranged on the four sides of the hydraulic station, respectively used to push the four friction plates to squeeze the four braking plates;

[0037] Four accelerating mechanisms, respectively installed between the four first pushing rods and the friction plates, used to double the moving distance of the first pushing rod before the first pushing rod pushes the friction plate to the squeezing and braking position, so as to advance the pushing of the friction plate to the squeezing and braking position in advance;

[0038] The hydraulic station pushes the first pushing rod to move, and the first pushing rod then pushes the accelerating mechanism, enabling the accelerating mechanism to respond quickly. Before the first pushing rod pushes the friction plate to the squeezing and braking position, the moving distance of the first pushing rod is doubled, and the friction plate is advanced to the squeezing and braking position in advance, thereby realizing a rapid pushing response to the friction plate;

[0039] After the friction plate is pushed to the squeezing and braking position, the hydraulic station continues to push the first pushing rod to move. At this time, the accelerating mechanism is positioned and disengaged from the first pushing rod, and the first pushing rod then moves to support the friction plate, thereby stably supporting the friction plate that has reached the squeezing and braking position.

[0040] Preferably, it further includes:

[0041] Four support frames, respectively slidably inserted into the four sides inside the braking box;

[0042] Four first mounting grooves are respectively formed inside the four support frames, and the four friction plates are respectively detachably and fixedly mounted inside the four first mounting grooves;

[0043] Four pressure sensors are respectively fixedly mounted inside the four first mounting grooves, and when the friction plate is pressed, it presses the pressure sensor;

[0044] The support frame mounts the friction plate through the first mounting groove. When the friction plate reaches the extrusion braking position and is squeezed between the brake pads, the pressure sensor is pressed. The extrusion pressure between the friction plate and the brake pad can be detected through the pressure received by the pressure sensor. Therefore, after detecting the extrusion pressure, it is possible to control the hydraulic station to further push the first push rod to move the friction plate for compensation after the friction plate wears, which helps to avoid the situation that the frictional force for braking decreases after the friction plate wears, resulting in a weakened braking effect and potential safety hazards.

[0045] Preferably, the acceleration mechanism includes:

[0046] Two groups of sliders. Two of the sliders are symmetrically arranged up and down as a group. The two sliders in the same group are both slidably mounted on the side wall of the support frame through the sliding grooves;

[0047] Four first rotating sleeves are respectively fixed inside the four sliders;

[0048] Two rotating shafts are both fixed inside the brake box;

[0049] Four second push rods, one end of each is respectively rotatably connected to the four first rotating sleeves, and the other end of each is respectively rotatably sleeved outside the adjacent rotating shaft through the second rotating sleeve;

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

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

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

[0053] After the first push rod moves, it drives the push frame to move. After the push frame moves, it pushes 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, and the second rotating sleeve drives the second push rod to rotate around the rotating shaft. The lengths of the second push rod at both ends of the rotating shaft are different. Therefore, when the third push rod is pushed a short distance, it drives the second push rod to flip by the same angle. At this time, the end of the second push rod moves a long distance. Thus, when the first push rod just moves, it can push the support frame to move a long distance, so as to push the friction plate to quickly reach the extrusion braking position to generate extrusion with the brake pad, which is beneficial to improving the reaction timeliness of the braking process.

[0054] Preferably, the acceleration mechanism further includes:

[0055] A clamping block, fixed on the inner wall of the through hole at the center of the push frame;

[0056] A clamping groove, formed on the outside of the first push rod;

[0057] The edges of the clamping block and the clamping groove are both set as rounded corners;

[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, thus driving the push frame to move. When the push frame indirectly pushes the friction plate to the designated position and the push frame can no longer push, when the first push rod continues to move, under the action of the rigid force, it pushes the clamping block and the clamping groove to separate, so that the first push rod can continue to move to stably support the friction plate.

[0059] Preferably, the acceleration mechanism further includes:

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

[0061] Two limiting blocks, respectively slidably inserted into the two second installation grooves, and springs are fixed between the limiting blocks and the inner walls of the second installation grooves;

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

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

[0064] When the pushing frame moves to the position of the limiting groove, the limiting block aligns 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 move further when it moves to align with the limiting groove, which is beneficial to improving the accuracy of the limiting block and the limiting groove.

[0065] Preferably, the acceleration mechanism further includes:

[0066] A fixed block, fixed on the side wall of the support frame;

[0067] A limiting ring, fixed on the outer wall of the fixed block;

[0068] A clamping end, fixed at the end of the first push rod;

[0069] An inner groove, opened on the side wall of the clamping end;

[0070] An annular groove, fixed inside the inner groove;

[0071] The first push rod drives the clamping end to move towards the fixed block, so that the fixed block is inserted into the inside of the inner groove, so that the annular groove is clamped and adapted to the limiting ring for positioning, so that the first push rod is connected to the support frame to stably support the friction plate.

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

[0073] 1. Through the setting of the magnetoelectric encoder, the present invention abandons the disadvantages of the traditional mechanical loose rope protection device being insensitive and unreliable, and fundamentally avoids the occurrence of loose rope accidents caused by the defects of the mechanical device;

[0074] 2. Through the setting of the emergency treatment unit, the pushing distance of the pushing component is amplified, and the friction plate is pushed to the extrusion braking position in advance, so as to realize the rapid pushing reaction of the friction plate, which is beneficial to improving the timeliness and stability of the braking effect; BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0078] Figure 4 is of the present invention Figure 3 The enlarged structural schematic diagram of part A in.

[0079] Figure 5Schematic diagram of the internal structure of the brake box of the present invention.

[0080] Figure 6 Of the present invention Figure 5 Enlarged schematic diagram of the structure at position B in

[0081] In the figure: 1, hoist; 2, brake box; 3, fixing plate; 301, telescopic frame; 302, buffer spring; 4, friction plate; 401, support frame; 402, first installation groove; 403, pressure sensor; 5, hydraulic station; 501, first push rod; 6, push frame; 601, second installation groove; 602, limit block; 603, limit groove; 604, clamping block; 605, clamping groove; 606, blocking block; 7, slider; 701, chute; 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, clamping end; 803, inner groove; 804, annular groove. Detailed implementation manners

[0082] 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 in the following description are only examples, and those skilled in the art can think of other obvious variations.

[0083] As Figures 1 to 5 shown in the all-digital loose rope protection device, including:

[0084] Two sets of magnetoelectric encoders, respectively installed on the head sheave and the hoist 1, for real-time detection of the running pulses of the head sheave and the hoist 1;

[0085] PLC, installed inside the control cabinet of the hoist 1, the pulse data of the head sheave and the hoist 1 of the magnetoelectric encoder are received by the PLC through the transmission line, and after being calculated and analyzed by the PLC program, the running speeds of the two are obtained to judge whether loose rope occurs according to the speed comparison;

[0086] Control panel, installed in the driver's control room, for real-time display of the speed values of the head sheave and the hoist 1, and recording the occurrence times of the loose rope phenomenon, providing data for subsequent equipment maintenance and fault analysis;

[0087] Emergency treatment unit, installed at the bottom of the hoist 1, for emergency braking of the hoist 1 in a short time when the PLC judges loose rope, and controlling the emergency treatment unit to start when the PLC judges that the loose rope phenomenon occurs;

[0088] At present, the slack rope protection device used is a mechanical travel switch with a pull wire, which has problems such as difficult setting of the pull wire height, failure and ineffectiveness of the travel switch due to improper maintenance, unreliable and insensitive slack rope protection actions. When the hoist lowers the waste rock and then raises it after discharging the waste rock, there will be problems of false actions of the slack rope protection, affecting continuous hoisting and transportation;

[0089] This embodiment of the present invention can solve the above problems. The specific implementation is as follows. The magnetoelectric encoder model can be selected as M-E I S38F, with an operating temperature of -40°C - 75°C and a protection level of IP67 (completely dust-free entry, protection against short-term immersion in water). It has remarkable performance, can be applied to relatively harsh environments, and can detect the running pulse numbers of the skywheel and the hoist 1 in real time;

[0090] The PLC model can be selected as H3U-1616MT. The pulse numbers of the skywheel and the hoist 1 are received by the PLC through transmission lines. After calculation and analysis by the PLC program, the running speeds of the two are obtained;

[0091] The control panel model can be selected as TPC1530. Through the control panel screen, the speed values of the skywheel and the hoist 1 can be displayed in real time, and the number of occurrences of the slack rope phenomenon can be recorded, providing important data for subsequent equipment maintenance and fault analysis;

[0092] By adopting a magnetoelectric encoder, the running speed pulses of the hoist 1 and the skywheel can be collected in real time. Through calculation by the PLC program and comparison of the speed values of the two, it is judged whether the slack rope phenomenon occurs, eliminating the disadvantages of the traditional mechanical slack rope protection device being insensitive and unreliable, and fundamentally avoiding the occurrence of slack rope accidents caused by the defects of the mechanical device;

[0093] It has an intelligent display and alarm function. The speed values of the hoist 1 and the skywheel are displayed in real time through the control panel, enabling operators and maintenance personnel to grasp the running state of the equipment in real time. When the slack rope phenomenon is detected, the system will immediately give a voice fault alarm, reminding the hoist driver to stop quickly and carry out emergency treatment, or disconnect the safety circuit and start emergency braking to ensure the safety of personnel and equipment. At the same time, the number of occurrences of the slack rope phenomenon is recorded, providing important data for subsequent equipment maintenance and fault analysis;

[0094] Fully considering the complex situations in actual operation, it can intelligently avoid the normal relaxation of the steel wire rope such as when raising after discharging waste rock and when unhooking and raising, effectively avoiding false actions and false alarms caused by these situations, greatly ensuring the normal operation of the hoist, avoiding unnecessary stops and handling processes, significantly improving the hoisting efficiency, and reducing the operation cost.

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

[0096] The PLC compares the running speeds 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 a loose rope phenomenon has occurred.

[0097] When a loose rope phenomenon occurs, after a set delay, fault outputs are respectively carried out through voice alarm and audible and visual alarm, and the safety circuit is controlled to be cut off.

[0098] The pulse numbers of the head sheave and the hoist 1 are received by the PLC through transmission lines. After being calculated and analyzed by the PLC program, the running speeds of the two are obtained and compared. When a loose rope phenomenon occurs, after a set delay, fault output is carried out, with voice and audible and visual alarm functions, and the safety circuit can also be cut off to achieve emergency braking.

[0099] As an optional embodiment, the emergency treatment unit includes:

[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 interference of the braking force on the hoist 1 during the braking process and to buffer the impact on the inside of the brake box 2 caused by the hoist 1 landing.

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

[0103] Four friction plates 4 are respectively installed on the four sides of the brake box 2 and are used to generate friction by squeezing against the brake plates to perform emergency braking on the hoist 1.

[0104] The pushing assembly is installed inside the brake box 2 and is used to amplify the pushing speed of the hydraulic push on the friction plate 4 to quickly push the friction plate 4 to squeeze the brake plate for emergency braking, and then to stably support and push the friction plate 4.

[0105] When a loose rope occurs, the PLC controls the emergency treatment unit to start, that is, controls the pushing assembly to start. After the pushing assembly starts, it pushes the friction plate 4. 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 squeezes the brake plate. When the hoist 1 falls, emergency braking can be carried out through the frictional force generated by the friction plate 4 squeezing the brake plate. In the second stage, after the first stage ends, the enlarged part of the pushing distance of the pushing assembly is positioned, and then the pushing assembly continues to push until the friction plate 4 is stably supported, so that the friction plate 4 can be stably supported when it is pushed to squeeze the brake piece, avoiding damage to the support of the friction plate 4 under the action of resistance and affecting the braking effect, thereby being beneficial to improving the timeliness and stability of the braking effect.

[0106] The buffer assembly is arranged such that when the pushing assembly pushes the friction plate 4 to squeeze the brake plate for braking, it buffers the impact vibration generated during the braking process, thereby slowing down the transmission of the vibration into the hoist 1, which is beneficial to improving the stability of the hoist 1 during braking and avoiding damage to the goods inside the hoist 1 or injury to personnel.

[0107] As an alternative embodiment, the buffer assembly includes:

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

[0109] Two fixing plates 3, 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;

[0110] A number of buffer springs 302, divided into two groups, and the two groups of buffer springs 302 are respectively fixed between the fixing plate 3 and the telescopic frame 301;

[0111] The upper telescopic frame 301 is fixedly connected between the hoist 1 and the brake box 2. When the brake box 2 generates impact vibration during braking, through the elastic buffering effect of the buffer spring 302, the transmission of the vibration into the hoist 1 is slowed down;

[0112] When the hoist 1 falls to the bottommost position, the bottom fixing plate 3 of the lower telescopic frame 301 contacts the ground. At this time, the impact vibration with the ground is buffered by the buffer spring 302, which is beneficial to avoiding the transmission of the vibration into the interior of the brake box 2 and causing damage to the equipment inside the brake box 2.

[0113] As an alternative embodiment, the pushing assembly includes:

[0114] A hydraulic station 5, fixed at the center inside the brake box 2;

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

[0116] Four acceleration mechanisms, respectively installed between the four first pushing rods 501 and the friction plates 4, used to double the moving distance of the first pushing rods 501 before the first pushing rods 501 push the friction plates 4 to reach the squeezing and braking position, so as to advance the friction plates 4 to reach the squeezing and braking position in advance;

[0117] The hydraulic station 5 pushes the first push rod 501 to move. The first push rod 501 pushes the rear push acceleration mechanism, enabling the acceleration mechanism to respond quickly. Before the first push rod 501 pushes the friction plate 4 to the extrusion braking position, the moving distance of the first push rod 501 is doubled, and the friction plate 4 is pushed to the extrusion braking position in advance, thereby realizing a quick push response to the friction plate 4.

[0118] After the friction plate 4 is pushed to 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 disengaged from the first push rod 501. The first push rod 501 then moves to support the friction plate 4, thereby stably supporting the friction plate 4 that has reached the extrusion braking position.

[0119] As an alternative embodiment, it further includes:

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

[0121] Four first installation grooves 402, which are respectively opened inside the four support frames 401. The four friction plates 4 are respectively detachably and fixedly installed inside the four first installation grooves 402.

[0122] Four pressure sensors 403, which are respectively fixedly installed inside the four first installation grooves 402. When the friction plate 4 is pressed, it squeezes the pressure sensor 403.

[0123] The support frame 401 installs the friction plate 4 through the first installation groove 402. When an extrusion occurs between the friction plate 4 and the brake pad when the friction plate 4 reaches the extrusion braking position, the pressure sensor 403 is pressed. The extrusion pressure between the friction plate 4 and the brake pad can be detected through the pressure detected by the pressure sensor 403. Thus, after detecting the extrusion pressure, it can control the hydraulic station 5 to further push the first push rod 501 to push the friction plate 4 to move and make up for the position after the friction plate 4 wears, which is beneficial to avoiding the situation that the braking friction force decreases due to the wear of the friction plate 4, resulting in a weakened braking effect and potential safety hazards.

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

[0125] Two groups of sliders 7, with two sliders 7 in a group and arranged symmetrically up and down. The two sliders 7 in the same group are both slidably installed on the side wall of the support frame 401 through the chute 701.

[0126] Four first rotating sleeves 702, which are respectively fixed inside the four sliders 7.

[0127] Two rotating shafts 704, which are both fixed inside the brake box 2.

[0128] Four second push rods 703, one ends of which are respectively rotatably connected to four first rotating sleeves 702, and the other ends of which are respectively rotatably sleeved outside adjacent rotating shafts 704 through second rotating sleeves 705;

[0129] Four third push rods 707 are respectively fixedly connected to four second rotating sleeves 705 through rotating rings 706;

[0130] The second push rods 703 and the third push rods 707 are arranged in a staggered manner with each other;

[0131] The push frame 6 is arranged outside the first push rod 501, and when the first push rod 501 moves, it drives the push frame 6 to move;

[0132] After the first push rod 501 moves, it drives the push frame 6 to move. After the push frame 6 moves, it pushes the third push rod 707, so that the third push rod 707 drives the rotating ring 706 to rotate. The rotating ring 706 drives the second rotating sleeve 705 to rotate, and the second rotating sleeve 705 drives the second push rod 703 to rotate around the rotating shaft 704. The lengths of the two ends of the second push rod 703 located at both ends of the rotating shaft 704 are different. Therefore, when the third push rod 707 is pushed for a short distance, it drives the second push rod 703 to flip by the same angle. At this time, the end of the second push rod 703 moves a long distance. Therefore, when the first push rod 501 just moves, it can push the support frame 401 to move a long distance, so as to push the friction plate 4 to quickly reach the extrusion braking position to generate extrusion with the brake pad, which is beneficial to improving the reaction timeliness of the braking process.

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

[0134] The clamping block 604 is fixed on the inner wall of the through-round hole at the center of the push frame 6;

[0135] The clamping groove 605 is opened outside the first push rod 501;

[0136] The edges of the clamping block 604 and the clamping groove 605 are both set as rounded corners;

[0137] The first push 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 push frame 6 to move, so as to drive the push frame 6 to move. When the push frame 6 indirectly pushes the friction plate 4 to reach the specified position, the push frame 6 cannot continue to push. At this time, when the first push rod 501 continues to move, under the action of the rigid force, it pushes the clamping block 604 to separate from the clamping groove 605, so that the first push rod 501 can continue to move to stably support the friction plate 4.

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

[0139] Two second mounting grooves 601 are symmetrically formed at the top and bottom of the pushing frame 6;

[0140] Two limiting blocks 602 are respectively inserted into the two second mounting grooves 601 in a sliding manner, and springs are fixed between the limiting blocks 602 and the inner walls of the second mounting grooves 601;

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

[0142] Two blocking blocks 606 are respectively fixed on one side of the edges of the two limiting grooves 603 facing away from the hydraulic station 5;

[0143] When the pushing frame 6 moves to the position of the limiting groove 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 insert into the limiting grooves 603, thereby limiting the pushing frame 6. The blocking blocks 606 can block the position of the pushing frame 6 and will not continue to move when the pushing frame 6 moves and aligns with the limiting grooves 603, which is beneficial to improving the accuracy of the limiting blocks 602 and the limiting grooves 603.

[0144] As an alternative embodiment, the acceleration mechanism further includes:

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

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

[0147] A clamping end 802 is fixed at the end of the first push rod 501;

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

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

[0150] The first push rod 501 drives the clamping end 802 to move towards the fixing block 8, so that the fixing block 8 is inserted into the inner groove 803, thereby making the annular groove 804 and the limiting ring 801 be clamped and adapted for positioning, so that the first push rod 501 is connected to the support frame 401 to stably support the friction plate 4.

[0151] The working principle of the present invention: The magnetic and electric encoder model can be selected as M-E I S38F, the operating temperature is -40°C - 75°C, the protection level is IP67 (completely dust-free entry, short-term water immersion protection), with remarkable performance, can be applicable to relatively harsh environments, and can detect the running pulse numbers of the sky wheel and the hoist 1 in real time;

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

[0153] The model of the control panel can be selected as TPC1530. The speed values of the skywheel and the hoist 1 can be displayed in real time through the control panel screen, and the number of times of loose rope phenomenon is recorded, providing important data for subsequent equipment maintenance and fault analysis.

[0154] By using a magnetoelectric encoder, the running speed pulses of the hoist 1 and the skywheel can be collected in real time. Through calculation by the PLC program and comparison of the speed values of the two, it is judged whether the loose rope phenomenon occurs, getting rid of the disadvantages of the traditional mechanical loose rope protection device being insensitive and unreliable, and fundamentally avoiding the occurrence of loose rope accidents caused by the defects of the mechanical device.

[0155] It has an intelligent display and alarm function. The speed values of the hoist 1 and the skywheel are displayed in real time through the control panel, enabling the operators and maintenance personnel to grasp the running state of the equipment in real time. When the loose rope phenomenon is detected, the system will immediately give a voice fault alarm, reminding the hoist driver to stop quickly and carry out emergency treatment, or disconnect the safety circuit and start emergency braking to ensure the safety of personnel and equipment. At the same time, the number of times of the loose rope phenomenon is recorded, providing important data for subsequent equipment maintenance and fault analysis.

[0156] Fully considering the complex situations in actual operation, it can intelligently avoid the normal relaxation of the steel wire rope such as when hoisting after discharging gangue and hoisting after unhooking, effectively avoiding misoperation and false alarm caused by these situations, greatly ensuring the normal operation of the hoist, avoiding unnecessary parking and treatment processes, significantly improving the hoisting efficiency, and reducing the operation cost.

[0157] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. 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 all fall within the scope of the present invention claimed.

Claims

1. Fully digital slack rope protection device, characterized in that: include: Two sets of magnetoelectric encoders are respectively installed on the sheave and the hoist (1) for real-time detection of the operating pulses of the sheave and the hoist (1); A PLC is installed inside a control cabinet of the hoist (1). The pulse data of the head wheel of the magnetoelectric encoder and the hoist (1) are received by the PLC through a transmission line. The running speeds of the two are obtained through calculation and analysis by the PLC program, so as to judge whether the rope is loose according to the speed comparison. A control panel installed in the driver's control room is used to display the speed values ​​of the sheave and the hoist (1) in real time and record the number of occurrences of the loose rope phenomenon to provide data for subsequent equipment maintenance and fault analysis; The emergency processing unit is installed at the bottom of the hoist (1) and is used to perform emergency braking on the hoist (1) within a short period of time when the PLC determines that the rope is loose, and to control the emergency processing unit to start when the PLC determines that the rope is loose.

2. The fully digital slack rope protection device according to claim 1 is characterized in that: Also includes: The PLC compares the running speeds of the sheave and the hoist (1), and when the speed of the sheave is 0 and the speed of the hoist is not 0, it is determined that a loose rope phenomenon has occurred; When the rope is loose, after a set delay, the fault output is made through voice alarm and sound and light alarm respectively, and the safety circuit is cut off by control.

3. The fully digital slack rope protection device according to claim 1 is characterized in that: The emergency processing unit comprises: A brake box (2) is arranged below the hoist (1); A buffer assembly is installed at the upper and lower ends of the brake box (2) and is used to reduce the vibration interference of the impact force generated by braking on the elevator (1) during the braking process, and is used to buffer the impact of the elevator (1) falling to the ground on the inside of the brake box (2); Four brake plates are respectively arranged on four sides of the hoist (1) and installed inside the shaft; Four friction plates (4) are respectively mounted on four sides of the brake box (2) and are used to generate friction by squeezing with the brake plate to perform emergency braking on the hoist (1); A pushing component is installed inside the brake box (2) and is used to amplify the pushing speed of the friction plate (4) during hydraulic pushing, so as to quickly push the friction plate (4) to squeeze the brake plate for emergency braking, and then stably support and push the friction plate (4).

4. The fully digital slack rope protection device according to claim 3 is characterized in that: The buffer assembly comprises: Two telescopic frames (301) are respectively fixed to the upper and lower ends of the brake box (2); Two fixed plates (3) are respectively fixed to opposite ends of the two telescopic frames (301), and the fixed plate (3) on the top of the upper telescopic frame (301) is fixedly connected to the bottom of the hoist (1); A plurality of buffer springs (302) are divided into two groups, and the two groups of buffer springs (302) are respectively fixed between the fixing plate (3) and the telescopic frame (301).

5. The fully digital slack rope protection device according to claim 3 is characterized in that: The pushing component comprises: A hydraulic station (5) fixed at the inner center of the brake box (2); Four first push rods (501) are arranged on four sides of the hydraulic station (5) and are respectively used to push the four friction plates (4) to squeeze the four brake plates; Four acceleration mechanisms are respectively installed between the four first push rods (501) and the friction plates (4), and are used to double the moving distance of the first push rod (501) before the first push rod (501) pushes the friction plate (4) to reach the squeeze braking position, so as to push the friction plate (4) to reach the squeeze braking position in advance.

6. The fully digital slack rope protection device according to claim 5, characterized in that: Also includes: Four support frames (401) are respectively slidably inserted into four sides of the brake box (2); Four first installation grooves (402) are respectively opened inside the four support frames (401), and the four friction plates (4) are respectively detachably fixedly installed inside the four first installation grooves (402); Four pressure sensors (403) are respectively fixedly mounted inside the four first mounting grooves (402), and the friction plate (4) presses the pressure sensors (403) when pressure is applied.

7. The fully digital slack rope protection device according to claim 6, characterized in that: The acceleration mechanism comprises: Two groups of sliders (7), wherein the two sliders (7) form a group and are symmetrically arranged up and down, and the two sliders (7) in the same group form a group, and are all slidably installed on the side wall of the support frame (401) through a slide groove (701); Four first rotating sleeves (702) are respectively fixed inside the four sliding blocks (7); Two rotating shafts (704) are both fixed inside the brake box (2); Four second push rods (703), one end of which is rotatably connected to the four first rotating sleeves (702) respectively, and the other end of which is rotatably sleeved on the outside of the adjacent rotating shafts (704) through second rotating sleeves (705); Four third push rods (707) are fixedly connected to the four second rotating sleeves (705) through rotating rings (706) respectively; The second push rod (703) and the third push rod (707) are arranged alternately with each other; The pushing frame (6) is arranged outside the first pushing rod (501), and when the first pushing rod (501) moves, the pushing frame (6) is driven to move.

8. The fully digital slack rope protection device according to claim 7, characterized in that: The acceleration mechanism also includes: A positioning block (604) is fixed on the inner wall of the through circular hole at the center of the pushing frame (6); A locking groove (605) is provided on the outside of the first push rod (501); The edges of the locking block (604) and the locking groove (605) are both configured as rounded corners.

9. The fully digital slack rope protection device according to claim 7, characterized in that: The acceleration mechanism also includes: Two second mounting grooves (601) are symmetrically arranged at the top and bottom of the pushing frame (6); Two limit blocks (602) are respectively slidably inserted into the two second installation grooves (601), and springs are fixed between the limit blocks (602) and the inner walls of the second installation grooves (601); Two limiting grooves (603) are respectively provided at the top and the bottom of the inner wall of the brake box (2); when the friction plate (4) is pushed to reach the squeeze braking position, the pushing frame (6) drives the limiting block (602) to reach the position of the limiting groove (603); The two blocking blocks (606) are respectively fixed on the sides of the edges of the two limiting grooves (603) facing away from the hydraulic station (5).

10. The fully digital slack rope protection device according to claim 7, characterized in that: The acceleration mechanism also includes: A fixing block (8) fixed on a side wall of the support frame (401); A limiting ring (801) is fixed on the outer wall of the fixing block (8); A clamping end (802) fixed to the end of the first push rod (501); An inner groove (803) is formed on a side wall of the clamping end (802); The annular groove (804) is fixed inside the inner groove (803).

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