High-speed cantilever type reciprocating elevator

Abstract

The invention provides a high-speed cantilever type reciprocating elevator, and relates to the technical field of elevators, a vertical part of an L-shaped frame comprises two stand columns, a connecting beam is arranged between the two stand columns, a transmission shaft transversely penetrates through the upper part of the vertical part of the L-shaped frame, the transmission shaft is driven by a driving motor to rotate, and a synchronous pulley fixedly sleeves the outer side of the transmission shaft; the synchronous belt is hung on the synchronous belt wheel for meshing transmission, the top of the L-shaped conveying platform is fixed to one end of the synchronous belt, the balance weight is hung at the other end of the synchronous belt, pulleys are arranged on the left side and the right side of the L-shaped conveying platform and move along vertical sliding rails of the L-shaped frame, and the electric control cabinet is provided with a PLC which is electrically connected with the driving motor. By the adoption of the two stand column frame mechanisms and the L-shaped cantilever type conveying platform, the occupied area is reduced, and the equipment is more compact and suitable for the working environment with the limited space; due to the cantilever type design, the material loading, unloading and conveying path is more direct and can be flexibly extended, and time delay caused by steering and roundabout operation in the material conveying process is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of elevators, and in particular to a high-speed cantilever reciprocating elevator. Background Art

[0002] As a heavy-duty and versatile mechanical equipment, elevators play an indispensable role in many key fields such as industrial production and logistics transportation. In industrial production, they are used to vertically transport various boxes, pallets, bags, barrels and packages to ensure the smoothness of the production process; in logistics transportation, they are widely used in warehouse stacking and rapid handling of goods, greatly improving logistics efficiency. In addition, traditional elevators have also demonstrated their wide application value in many other fields with their stable and safe performance characteristics, and have become an indispensable and important tool in modern industrial production and logistics transportation.

[0003] However, traditional elevators also have the following problems: Large footprint, high cost, and difficult maintenance: Traditional reciprocating elevators usually adopt a four-column frame structure. This structure causes it to occupy a large area, with a low space utilization rate and a large amount of factory space wasted. At the same time, the four-column frame equipment requires more materials during the manufacturing process, which leads to a significant increase in manufacturing costs. In addition, due to the characteristics of the four-column frame structure, when performing inspection and maintenance work, the staff often need to enter the body to carry out related operations, which increases the difficulty and complexity of the inspection and maintenance work.

[0004] High energy consumption: Traditional elevators consume a lot of energy during operation, which not only increases production costs, but also does not conform to the current environmental protection concept of energy conservation and emission reduction. The problem of high energy consumption mainly stems from its design principle and working method, which requires a lot of energy to lift materials.

[0005] Low conveying efficiency: Although traditional elevators can complete basic material lifting tasks, they are insufficient in conveying efficiency. For example, material blockage and uneven conveying speed may occur during the conveying process, thus affecting the overall production efficiency.

[0006] Easy to damage: Traditional elevators have many mechanical parts and are easily subject to wear and impact during use, which results in a relatively short service life of the equipment and requires regular maintenance and replacement of parts, which not only increases maintenance costs but may also affect the continuity and stability of production. Summary of the invention

[0007] The purpose of the present invention is to provide a high-speed cantilever reciprocating hoist.

[0008] In order to achieve the above object, the technical solution of the present invention is: A high-speed cantilever reciprocating hoist comprises an L-shaped frame, an L-shaped conveying platform, a driving motor, a transmission shaft, a synchronous pulley, a synchronous belt and an electric control cabinet, wherein the L-shaped frame comprises a bottom horizontal part and a vertical part, the vertical part of the L-shaped frame comprises two left-right symmetrical columns, the two columns are vertically installed on the ground foundation, a transverse connecting beam is arranged between the two columns, the transmission shaft passes through the upper part of the vertical part of the L-shaped frame in the transverse direction, the transmission shaft is driven to rotate by the driving motor, the synchronous pulley is fixedly sleeved on the outer side of the transmission shaft, the synchronous belt is hung on the synchronous pulley, the synchronous belt is meshed with the synchronous pulley for transmission, the top of the L-shaped conveying platform is fixedly connected to one end of the synchronous belt, a counterweight is hung on the other end of the synchronous belt, pulleys are arranged on the left and right sides of the L-shaped conveying platform, the pulleys move along the vertical slide rails on the left and right sides of the vertical part of the L-shaped frame, the electric control cabinet is provided with a PLC controller, and the PLC controller is connected to the The driving motor is electrically connected, and limit sensors are respectively provided at the top and bottom of the vertical part of the L-shaped frame. The detection end of the limit sensor contacts the side of the L-shaped conveying platform to limit the lifting or lowering height of the synchronous belt. A weight sensor is provided on the L-shaped conveying platform, and a sensor mounting plate is provided on the side of the L-shaped conveying platform. A slot-type deceleration photoelectric sensor, a slot-type rising stop photoelectric sensor and a slot-type descending stop photoelectric sensor are provided on the sensor mounting plate. The slot-type deceleration photoelectric sensor detects the shading plate of the vertical part of the L-shaped frame and sends a deceleration signal from time to time. The slot-type rising stop photoelectric sensor and the slot-type descending stop photoelectric sensor respectively control the start and stop of the rising and descending of the L-shaped conveying platform. The driving motor is provided with a speed sensor, and the weight sensor, the slot-type deceleration photoelectric sensor, the slot-type rising stop photoelectric sensor, the slot-type descending stop photoelectric sensor and the speed sensor are all electrically connected to the PLC controller.

[0009] Furthermore, the inner side of the synchronous belt is provided with belt teeth, the rim of the synchronous belt pulley is provided with tooth grooves, and the synchronous belt is tightly meshed with the tooth grooves of the synchronous belt pulley through the belt teeth.

[0010] Furthermore, a keyway is provided on the inner side of the synchronous pulley hub, a convex key is provided on the outer side of the transmission shaft, and the synchronous pulley is positioned by the keyway and the convex key of the transmission shaft.

[0011] Furthermore, a first lifting bracket is fixedly provided on the upper end of the L-shaped conveying platform, a first lifting eyebolt is fixedly provided on one end of the synchronous belt, the first lifting eyebolt is sleeved and fixed on the first lifting bracket, a second lifting bracket is fixedly provided on the upper end of the counterweight, a second lifting eyebolt is fixedly provided on the other end of the synchronous belt, and the second lifting eyebolt is sleeved and fixed on the second lifting bracket.

[0012] Furthermore, a spring is provided upward at the lower end of the inner ring of the first lifting eye bolt, and a chain break detection sleeve is fixedly provided at the upper end of the spring. The chain break detection sleeve is pressed against the upper end of the inner ring of the first lifting bracket, and the chain break detection sleeve is electrically connected to the tension sensor, and the tension sensor is electrically connected to the PLC controller.

[0013] Furthermore, a belt conveyor is provided on the horizontal section frame of the L-shaped conveying platform. The belt conveyor includes a frame, rollers, a conveyor belt and a conveying motor. The conveyor belt is tightly sleeved on the rollers on the front and rear sides of the frame, and the rollers are driven by the conveying motor.

[0014] Furthermore, the sensor mounting plate is provided with a counting detection sensor. Each time the goods pass through the slot of the counting detection sensor, the counting detection sensor sends a pulse signal to the PLC controller and counts, so as to count the number of goods transported by the L-shaped conveying platform.

[0015] Furthermore, tray position detection sensors are provided on brackets on both sides of the bottom of the L-shaped conveying platform, and the tray position detection sensors are electrically connected to the PLC controller to detect whether there are protrusions on the tray.

[0016] Furthermore, a floor photoelectric sensor is provided on the side of the L-shaped conveying platform, and a number of floor photoelectric sensing devices are evenly provided along the vertical direction of the L-shaped frame. The floor photoelectric sensor cooperates with the floor photoelectric sensing device, and the floor photoelectric sensor and the floor sensing device are electrically connected to the PLC controller to confirm the floor number where the L-shaped conveying platform is located.

[0017] Furthermore, the L-shaped conveying platform is provided with a speed limiter and a safety clamp. The speed limiter is electrically connected to the PLC controller, and the speed limiter and the safety clamp are connected through a lifting mechanism. When the speed of the L-shaped conveying platform exceeds a specified value, the PLC controller controls the speed limiter to pull up the safety clamp through the lifting mechanism, so that the safety clamp rubs against the vertical slide rail of the vertical part of the L-shaped frame to brake the L-shaped conveying platform.

[0018] The high-speed cantilever reciprocating elevator of the present invention adopts a two-column frame mechanism and an L-shaped cantilever conveying platform through reasonable design, which effectively reduces the occupied area, makes the equipment more compact, and is suitable for working environments with limited space.

[0019] The cantilever design makes the material loading and unloading and conveying path more direct. It can be flexibly extended within a certain range, reducing the time delay caused by turning and roundabout operations during the material transportation process, so that the material can be quickly lifted and transported to the target location via a shorter path.

[0020] The present invention is equipped with a control system that is linked to a PLC and a sensor, which can accurately adjust the operation of the elevator. By precisely controlling the motor speed and the movement speed of the conveying platform, the conveying speed of the elevator can be adjusted to the optimal state according to actual conveying needs, thereby achieving fast and stable conveying.

[0021] The present invention is equipped with a safety anti-falling mechanism to ensure the stability of materials and equipment during the lifting process, thereby improving the safety of operation.

[0022] In summary, the high-speed cantilever reciprocating elevator solves the technical problems of large footprint, low conveying efficiency, complex operation, high maintenance cost, and limited flexibility through its unique design and intelligent control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the motor driving part of the present invention; Figure 3 It is a structural schematic diagram of the L-shaped conveying platform of the present invention; Figure 4 It is a structural schematic diagram of the belt conveyor of the present invention; Figure 5 It is a schematic diagram of the connection structure of the two ends of the synchronous belt of the present invention; Figure 6 It is a structural schematic diagram of the safety protection device of the present invention; Figure 7 It is a structural schematic diagram of the sensor mounting plate and each sensor of the present invention.

[0024] Reference numerals: 1L-type frame, 2L-type conveying platform, 3 driving motors, 4 transmission shafts, 5 synchronous pulleys; 6 synchronous belt, 7 counterweight, 8 pulley, 9 vertical slide rail, 10 limit sensor; 11 sensor mounting plate, 12 slot type deceleration photoelectric sensor, 13 slot type rise stop photoelectric sensor; 14 trough type descending stop photoelectric sensor, 15 counting detection sensor, 16 belt conveyor; 17 protective cover, 18 protective fence; 101 columns, 102 connecting beams; 201 first lifting bracket; 601 first lifting eye bolt, 602 second lifting eye bolt; 701 second lifting bracket; 1601 frame, 1602 roller, 1603 conveyor belt, 1604 conveyor motor. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] This embodiment discloses a high-speed cantilever reciprocating hoist, such as Figure 1 As shown, it is composed of the following parts: a power unit, a transmission device, an L-shaped conveying platform 2, an L-shaped frame 1, a counterweight 7, a control part, a detection part, a conveying system, an L-shaped conveying platform 2 communication system and an electrical safety system.

[0027] The power unit includes: Drive motor 3; Figure 2 As shown, a servo motor is used, which is mainly composed of a motor body, an encoder and a controller. It can quickly start, stop and change the direction of movement to meet the needs of high-speed reciprocating motion. It can provide a large torque to ensure that the cantilever can operate stably when lifting a heavier load. A PLC controller is used to control the operation of the drive motor 3. By writing a control program, the reciprocating lifting motion law of the cantilever can be realized, such as setting the lifting height, speed, and dwell time parameters.

[0028] The drive motor 3 is equipped with an encoder, which feeds back the position and speed information of the drive motor 3 to the PLC controller. If the actual operating position of the drive motor 3 deviates from the preset position, the PLC controller adjusts the output of the drive motor 3 according to the feedback information to achieve closed-loop control and ensure the accuracy of cantilever lifting.

[0029] Mounting seat; used to fix the torque arm of the drive motor 3. The drive motor 3 generates torque during operation. The torque arm balances the torque generated by the drive motor 3 to prevent unnecessary rotation of the drive motor 3. The mounting seat provides a stable installation base for the torque arm.

[0030] The transmission includes: Transmission shaft 4; Figure 2 As shown, it is a cylindrical metal rod connected to the output shaft of the driving motor 3. The left and right ends of the transmission shaft 4 are connected to the columns of the L-shaped frame 1 through flanges. Two synchronous pulleys 5 are installed on the transmission shaft 4. The power generated by the driving motor 3 is transmitted to the synchronous pulley 5 through the transmission shaft 4. When the driving motor 3 rotates, it drives the transmission shaft 4 to rotate synchronously. The rotational motion of the transmission shaft 4 is then transmitted to the synchronous pulley 5 through a key connection, so that the synchronous pulley 5 rotates, thereby driving the synchronous belt 6 to move.

[0031] The synchronous belt 6 is composed of a belt back, belt teeth and a tensile layer. The synchronous belt 6 realizes power transmission by tightly meshing the belt teeth with the tooth grooves of the synchronous pulley 5. When the synchronous pulley 5 rotates under the drive of the drive motor 3, the tooth grooves of the synchronous pulley 5 interact with the belt teeth of the synchronous belt 6 in turn. Due to the precise fit between the teeth, the synchronous belt 6 will be driven by the pulley and move synchronously at the same linear speed.

[0032] The synchronous pulley 5 is composed of a rim, a hub and spokes. The rim is the part of the synchronous pulley 5 that is in direct contact with the synchronous belt 6, corresponding to the arc tooth groove of the synchronous belt 6. The part where the hub and the drive shaft 4 are connected has a keyway, which transmits the power of the drive shaft 4 to the pulley. The spokes connect the rim and the hub, and play a role in supporting the rim and transmitting torque.

[0033] like Figure 3 As shown, the L-shaped conveying platform 2 includes a horizontal section frame and a vertical section frame. The horizontal section frame extends outward to reach the working area, and the vertical section frame serves to connect the horizontal section and the column 101 of the L-shaped frame 1.

[0034] The horizontal section frame is a frame structure composed of cross beams and longitudinal beams. The cross beams are mainly used to bear the bending moment caused by the weight of the cargo. The longitudinal beams connect the cross beams and disperse the load. The cross beams and longitudinal beams are connected by bolts to form a stable frame. The horizontal section frame carries the cargo.

[0035] The vertical section frame is also a frame structure composed of horizontal beams and longitudinal beams. A lifting bracket is provided on the top of the vertical section frame for connecting the synchronous belt 6. There is a set of pulleys 8 on both sides of the vertical section frame, with a total of four pulleys 8, which slide up and down along the vertical guide rails on the front and rear sides of the L-shaped frame 1, thereby realizing the lifting and lowering actions.

[0036] The L-shaped frame 1 comprises a bottom horizontal portion, a vertical portion and diagonal braces.

[0037] The bottom horizontal part mainly resists torsional force and bears bending moment. When the synchronous belt 6 moves in cantilever motion, torsional force will be generated, and the horizontal part can effectively prevent the frame from being deformed due to such torsional force, thereby ensuring the stability and integrity of the L-shaped frame 1.

[0038] The vertical part includes a frame with a double column 101 structure. The two columns 101 are vertically installed on the ground foundation. There is a transverse connecting beam 102 between the two columns 101 to improve the overall deformation resistance of the frame.

[0039] The bottom horizontal part of the L-shaped frame 1 is connected to the foundation through anchor bolts, and the middle part of the vertical part of the L-shaped frame 1 is fixed to the floor through an anti-sway fixing structure to ensure the stability of the L-shaped frame 1.

[0040] The L-shaped frame 1 mainly bears the gravity from the cantilever and the material, the inertia force generated by the cantilever movement and the possible lateral force; when the L-shaped conveying platform 2 lifts the goods and moves, the gravity of the goods is transmitted to the column through the synchronous belt 6, causing the column to bear axial pressure. If the L-shaped conveying platform 2 starts, stops or changes direction quickly, inertia force will be generated, and this part of the force will also act on the column.

[0041] In order to enhance the stability of the vertical part, diagonal braces are provided. The diagonal braces and the columns form a triangular stable structure. When the synchronous belt 6 moves, lateral force will be generated when the inertia force of the cargo, the center of gravity of the material and the central axis of the synchronous belt 6 do not coincide, and the material swings during the lifting process. In addition to bearing the axial pressure, the vertical part also needs to resist this lateral force. At this time, the diagonal braces will generate corresponding tension or pressure, and cooperate with the columns to decompose and transfer the lateral force to the basic structure, thereby preventing the columns from bending and deforming and maintaining the stability of the vertical part.

[0042] Counterweight 7 is used to balance the weight of both ends of the synchronous belt 6. Since one side of the synchronous belt 6 cantilever structure is suspended, a large unbalanced torque will be generated when carrying goods. The counterweight 7 effectively reduces the torque required for the drive motor 3 to lift the goods, such as Figure 5 As shown, a second hanging bracket 701 is fixedly provided on the upper end of the counterweight 7 , and a second hanging eye bolt 602 is fixedly provided on the rear end of the synchronous belt 6 , and the second hanging eye bolt 602 is sleeved and fixed on the second hanging bracket 701 .

[0043] The control part includes: Electric control cabinet; mainly composed of circuit breakers, contactors, relays, frequency converters, PLC controllers, power modules, buttons and indicator lights.

[0044] The PLC controller can process various sensor signals, such as limit switch signals, speed sensor signals, etc., to perform precise position control and speed control on the L-shaped conveying platform 2.

[0045] Operating console: Based on the PLC controller, the operating instructions are processed and controlled to realize the automatic control of the L-shaped conveying platform 2. The operating console is arranged with control handles, switches, buttons, and indicator lights to control the start, stop, acceleration, deceleration, rise, descent, and braking of the L-shaped conveying platform 2.

[0046] The operation console can realize the following functions: 1) Operation control: The operator sends instructions to the electrical control system of the L-shaped conveying platform 2 through the handles, switches and buttons on the operating table to implement various operating operations of the L-shaped conveying platform 2, such as starting, stopping, accelerating, decelerating, forward and reverse.

[0047] 2) Status monitoring: The operating parameters and working status of the elevator are monitored in real time through instruments and indicator lights. The operator can understand the operating status of the elevator in a timely manner based on the monitoring information.

[0048] 3) Safety protection: The operating console is connected to the safety protection system. When the elevator is overloaded, overspeeded, or the chain is broken, the operating console will immediately trigger the corresponding safety protection device to ensure the safety of personnel and equipment.

[0049] 3) Emergency brake: The operating console is connected to the brake system. When an emergency occurs, such as the operator pressing the emergency stop button, a serious failure of the equipment, or overload or overspeed, the operating console will immediately trigger the brake system to stop the elevator quickly.

[0050] 4) Safety interlock protection: Safety interlock devices are installed between the operating console and other key equipment and systems, such as interlock control with the position detection device, loading equipment, and unloading equipment of the L-shaped conveying platform 2. Only when all safety conditions are met can the elevator start and operate normally.

[0051] 5) Fault alarm and prompt: When a fault is detected in the hoist system, the operating console will send out corresponding alarm signals through the sound and light alarm device, such as buzzer beeping, fault indicator light flashing, and detailed fault information will be displayed on the display screen, including fault type, fault location, and occurrence time.

[0052] 6) Interaction with the electrical control system: The operating console serves as the interface between the operator and the electrical control system of the elevator. It transmits the operator's operating instructions to the electrical control system. The electrical control system controls the operation of the elevator's motor, inverter, contactor, and relay according to these instructions to realize various actions and functions of the elevator.

[0053] 7) Interaction with the sensor system: Connect with various sensors on the elevator, such as speed sensors and position sensors, receive real-time data collected by the sensors, and display and process them on the operating console. Based on the sensor data, the operating console can monitor the operating status, perform protection control and fault diagnosis of the elevator.

[0054] The detection part includes: The limit sensor 10 includes a limit switch WLCA32-43-N and a bracket on the cable trough, one at the bottom and one at the top, which are installed on the vertical part of the L-shaped frame 1. When the cantilever of the hoist reaches the set limit position, it triggers a signal by contacting the mechanical part at the limit position, and sends a signal to the controller to stop the corresponding movement to prevent the equipment from exceeding the safety range.

[0055] The weight sensor is installed on the L-shaped conveying platform 2 and is used to detect the weight of the goods. When the weight sensor detects that the weight of the goods exceeds the rated load, the PLC controller immediately stops the operation of the L-shaped conveying platform 2 and sends out an overload alarm signal.

[0056] Speed ​​sensor; indirectly obtains the running speed of the elevator by detecting the rotation speed of the drive motor 3. If the speed sensor detects that the running speed of the elevator is abnormal, such as overspeed, the PLC controller adjusts the driving power of the drive motor 3 to restore the elevator to normal speed.

[0057] Groove type deceleration photoelectric sensor 12; such as Figure 7 As shown, a sensor mounting plate 11 is provided on the side of the L-shaped conveying platform 2, and a groove-type deceleration photoelectric sensor 12 is provided on the sensor mounting plate 11. The groove-type deceleration photoelectric sensor 12 emits infrared light. When an object passes through the groove-type area, the light reception situation changes and the photoelectric sensor generates a signal.

[0058] A shading plate is installed at a designated position on the vertical part of the L-shaped frame 1 along the rising and falling directions of the L-shaped conveying platform 2. During the rising process of the L-shaped conveying platform 2, when the shading plate at the designated position on the frame enters the groove area of ​​the groove-shaped deceleration photoelectric sensor 12, the light path is cut off, and the groove-shaped deceleration photoelectric sensor 12 detects the change in the light signal and sends out a forced deceleration signal.

[0059] Groove-type rising stop photoelectric sensor 13, groove-type descending stop photoelectric sensor 14; install a shading plate at the designated position along the rising and descending direction of the L-shaped conveying platform 2 on the vertical part frame of the L-shaped frame 1, and install the groove-type rising stop photoelectric sensor 13 and the groove-type descending stop photoelectric sensor 14 on the sensor mounting plate 11, the principle is the same as the groove-type deceleration photoelectric sensor 12.

[0060] The counting detection sensor 15 is installed on the sensor mounting plate 11. Each time the goods pass through the slot of the counting detection sensor 15, the counting detection sensor 15 generates a pulse signal. The PLC controller counts after receiving the pulse signal, thereby accurately counting the number of goods transported by the elevator. The principle is the same as that of the slot-type deceleration photoelectric sensor 12.

[0061] Pallet position detection sensor; uses a photoelectric sensor, which consists of a light emitter and a receiver. The light emitter emits light. When the pallet passes through the detection area under normal conditions, the light will not be blocked or reflected normally. If there are protrusions on the pallet, the protrusions will block the light, causing the light signal received by the receiver to change, thereby detecting that the pallet has a protrusion. For example, if the goods are not placed neatly and have protruding parts, the sensor will be triggered.

[0062] The pallet position detection sensor is installed on the brackets on both sides of the bottom of the L-shaped conveying platform 2. It can detect whether there are protrusions on the pallet to prevent the protrusions on the pallet from colliding with the elevator and avoiding damage to the equipment.

[0063] Floor confirmation sensor; installed on the L-shaped conveying platform 2, a corresponding floor photoelectric sensor is set at the corresponding position of each floor, and the floor position is determined by the interaction between the floor confirmation sensor and the floor photoelectric sensor.

[0064] The floor confirmation sensor detects the existence and position of the L-shaped conveying platform 2 by emitting and receiving light. A floor photoelectric sensor is installed at the corresponding position of each floor of the elevator frame. When the L-shaped conveying platform 2 of the elevator passes by, it will block the light. The sensor determines whether the L-shaped conveying platform 2 has reached the floor based on the change in light, thereby realizing floor confirmation.

[0065] Chain break detection sensor; including chain break detection sleeve, spring, tension sensor, such as Figure 5 As shown, a first hanging bracket 201 is fixedly provided at the upper end of the L-shaped conveying platform 2 , a first hanging eye bolt 601 is fixedly provided at the front end of the synchronous belt 6 , and the first hanging eye bolt 601 is sleeved and fixed on the first hanging bracket 201 .

[0066] The spring is installed upward on the lower end of the inner ring of the first lifting eye bolt 601, the lower part of the broken chain detection sleeve is fixedly sleeved on the upper end of the spring, the upper end of the broken chain detection sleeve is pressed against the upper end of the inner ring of the first lifting bracket 201, the broken chain detection sleeve is electrically connected to the tension sensor, and the tension sensor is electrically connected to the PLC controller.

[0067] During normal operation, the tension of the synchronous belt 6 is transmitted through the first hanging bolt, and the spring produces corresponding deformation according to the tension.

[0068] For example, when the load on the L-shaped conveying platform 2 increases, the tension of the synchronous belt 6 increases, the spring is compressed, and elastic potential energy is stored; when the load decreases, the spring recovers part of its deformation, and this change in tension is transmitted to the chain break detection sleeve through the system composed of the first lifting bolt and the spring. The chain break detection sleeve transmits the tension change to the tension sensor, and the tension sensor sends the detected electrical signal to the PLC controller, which analyzes and processes the signal.

[0069] Under normal circumstances, the tension sensor signal is in a relatively stable range, and the PLC controller determines whether a chain break occurs by comparing the received signal with a preset threshold.

[0070] If the signal exceeds the normal range, the PLC controller will determine that a chain break may have occurred, thereby triggering the alarm device and taking corresponding safety measures, such as stopping the operation of the elevator.

[0071] like Figure 4 As shown, the L-shaped conveying platform 2 is provided with a conveying system, which includes a belt conveyor 16. The belt conveyor 16 is installed across the horizontal section frame of the L-shaped conveying platform 2 in the left-right direction and can be stacked in two layers. The belt conveyor 16 includes a frame 1601, rollers 1602, a conveyor belt 1603 and a conveying motor 1604. The conveyor belt 1603 is tightly sleeved on the rollers 1602 on the front and rear sides of the frame 1601. The rollers 1602 are driven by the conveying motor 1604, and the conveyor belt 1603 is dragged by the friction between the driving roller and the conveyor belt 1603.

[0072] The material is fed from the feeding end of the belt conveyor 16, falls on the rotating conveyor belt 1603, and is driven by the friction of the conveyor belt 1603 to be transported to the designated location for unloading.

[0073] A conveyor movable baffle device is installed on the belt conveyor 16 through a guide rail. The top of the movable baffle device is a groove-shaped metal baffle. The lower end of the movable baffle device is connected to a push rod and a piston rod that transmits linear motion. The conveying motor 1604 provides power to push the push rod part up and down.

[0074] The communication system of the L-type conveyor platform 2 is realized through a flat cable (or drag chain cable). The starting end is near the control cabinet and fixed with a bracket or cable clamp. A guide device is set to guide the direction to prevent collision and entanglement. The cable is laid along the path to prevent twisting and knotting. It is fixed with a cable tie. The end is connected to the L-type conveyor platform 2 equipment and connected with a terminal. After checking for problems, it is wrapped and sealed. After the flat cable is installed, the tension of the cable is appropriately adjusted.

[0075] The communication equipment in the L-shaped conveying platform 2 includes a camera, a sensor, a data collector and a wireless communication module. The camera is used to collect video images in the L-shaped conveying platform 2. The sensor and the data collector are used to collect the operating status data and environmental data of the L-shaped conveying platform 2. The wireless communication module is configured accordingly according to the wireless communication method adopted to realize the wireless connection between the L-shaped conveying platform 2 and the outside.

[0076] The external equipment corresponding to the L-type conveying platform 2 includes the duty room host, the control center server, the monitoring terminal, and the wireless base station. The control center server is used to store and process the operating status data and video images transmitted from the L-type conveying platform 2, and to perform real-time monitoring and analysis. The monitoring terminal is used for management personnel and maintenance personnel to view the operating status of the L-type conveying platform 2. The wireless base station provides signal coverage and support for wireless communications.

[0077] The speed limiter, tensioner and safety clamp constitute the safety braking system of the elevator.

[0078] The speed limiter detects the operating speed of the elevator. When the operating speed of the elevator exceeds the set limit speed, the speed limiter will trigger an action. For example, when the downward speed of the L-shaped conveying platform 2 exceeds 115% of the rated speed, the speed limiter will activate the safety mechanism.

[0079] The speed limiter can accurately sense speed changes, and its internal mechanical or electrical devices can produce corresponding actions based on the speed.

[0080] When an electromagnetic speed limiter is used, at normal speed, the electrical signal is within the normal range. When the speed exceeds the specified value, the electrical signal strength changes. The PLC controller receives the changed signal and triggers the braking command after processing.

[0081] The tensioning device is used to maintain the appropriate tension of the synchronous belt 6. It can ensure that the synchronous belt 6 is in a tensioned state at all times, prevent the synchronous belt 6 from loosening, and keep the synchronous belt 6 in good contact and friction conditions with other components.

[0082] The speed limiter is connected to the safety clamp through a lifting mechanism. When the speed of the L-shaped conveying platform 2 exceeds the specified value, the PLC controller controls the speed limiter to pull up the safety clamp through the lifting mechanism, so that the safety clamp rubs against the vertical slide rail 9 of the vertical part of the L-shaped frame 1 to brake the L-shaped conveying platform 2.

[0083] For example, when the driving device of the elevator is out of control and causes the L-shaped conveying platform 2 to descend at an excessive speed, the safety clamp can act quickly to tightly clamp the vertical slide rail 9 to stop the L-shaped conveying platform 2 from falling.

[0084] When the speed of the L-shaped conveying platform 2 exceeds the preset safety speed (for example, 115% of the rated speed), the mechanical or electrical device of the speed limiter will be activated. For a mechanical speed limiter, when overspeeding, the centrifugal block or flyweight inside it will move due to the centrifugal force, and drive the brake element of the safety clamp through the pulling mechanism (such as a pull rod or rope). For an electromagnetically triggered speed limiter, the overspeed signal will cause the electromagnetic device to move, thereby driving the pulling mechanism.

[0085] The braking method of the wedge-type safety clamp is as follows: when the lifting mechanism is triggered, for the wedge-type safety clamp, the lifting action will cause the wedge to move upward or toward the vertical guide rail. As the L-shaped conveying platform 2 continues to descend, the angle between the wedge and the vertical guide rail will make the wedge tighter and tighter. Since the friction force generated between the wedge and the vertical guide rail counteracts the gravity and descending power of the L-shaped conveying platform 2, when the friction force is large enough, the descending speed of the L-shaped conveying platform 2 will rapidly decrease until it stops. The magnitude of the friction force depends on the shape and material of the wedge and the contact pressure between the wedge and the vertical guide rail.

[0086] The electrical safety system includes: Overload protection device: installed in the motor circuit of the hoist, it determines whether it is overloaded by detecting the current of the motor. For example, a thermal relay is a common overload protection device. When the motor current exceeds the rated current for a certain period of time, the bimetallic strip inside the thermal relay will bend and deform due to heat, thereby cutting off the motor circuit. Alternatively, an electronic overload protector can be used, which monitors the current in real time through a current transformer. When the current exceeds the set value, it immediately sends a signal to cut off the circuit.

[0087] Leakage protection device; used to detect whether there is leakage in the electrical system of the hoist. It determines whether there is leakage by detecting whether the current flowing into and out of the equipment is balanced. Once leakage is detected, the leakage protection device will quickly cut off the power supply.

[0088] For example, with a residual current protective device, when a leakage occurs in the equipment and the difference between the inflow and outflow currents reaches the operating current (30mA), the RCD will cut off the circuit in a very short time (0.1 second).

[0089] Emergency stop button; installed on the operating panel of the elevator. When an emergency occurs, such as signs of broken chain or people being trapped, press the emergency stop button to directly cut off the power supply of the elevator or trigger the braking system. The emergency stop button adopts a normally closed contact design. Under normal circumstances, the circuit is connected. After pressing the button, the circuit is disconnected to achieve emergency braking.

[0090] like Figure 6 As shown, the elevator of this embodiment is provided with a safety protection device, including a protective cover 17 and a protective fence 18. The protective cover 17 is arranged around the driving motor 3 and the transmission parts of the elevator to prevent foreign matter from entering the transmission parts and avoid mechanical failure. The protective fence 18 can prevent personnel from accidentally contacting the running parts.

[0091] For example, metal protective covers with observation windows are installed in the chain and sprocket transmission areas of the elevator to facilitate operators to check the equipment while preventing tools and debris from falling into the transmission area.

[0092] The elevator in this embodiment is also provided with a safety interlock device, which is implemented by mechanical interlocking or electrical interlocking. The door lock mechanism of the L-shaped conveying platform 2 door is interlocked with the control circuit of the elevator. Only when the door lock is completely locked can the control circuit be connected; the electrical interlock sends the switch status signal of the L-shaped conveying platform 2 door to the PLC controller through the door status sensor. Only when the door closing signal is received, the PLC controller allows the elevator to start.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-speed cantilever reciprocating hoist, characterized in that: The invention comprises an L-shaped frame (1), an L-shaped conveying platform (2), a driving motor (3), a transmission shaft (4), a synchronous pulley (5), a synchronous belt (6) and an electric control cabinet, wherein the L-shaped frame (1) comprises a bottom horizontal part and a vertical part, the vertical part of the L-shaped frame (1) comprises two vertically symmetrical columns (101), the two columns (101) are vertically installed on a ground foundation, a horizontal connecting beam (102) is provided between the two columns (101), the transmission shaft (4) passes through the upper part of the vertical part of the L-shaped frame (1) in the horizontal direction, and the transmission shaft (4) is driven by the driving motor (3 ) is driven to rotate, the synchronous pulley (5) is fixedly sleeved on the outer side of the transmission shaft (4), the synchronous belt (6) is hung on the synchronous pulley (5), the synchronous belt (6) and the synchronous pulley (5) are meshed and transmitted, the top of the L-shaped conveying platform (2) is fixedly connected to one end of the synchronous belt (6), the other end of the synchronous belt (6) is hung with a counterweight (7), the left and right sides of the L-shaped conveying platform (2) are provided with pulleys (8), the pulleys (8) move along the vertical slide rails (9) on the left and right sides of the vertical part of the L-shaped frame (1), the electric control cabinet is provided with a PLC controller, the PL The C controller is electrically connected to the drive motor (3); the top and bottom of the vertical part of the L-shaped frame (1) are respectively provided with limit sensors (10); the detection end of the limit sensor (10) contacts the side of the L-shaped conveying platform (2) to limit the lifting or lowering height of the synchronous belt (6); a weight sensor is provided on the L-shaped conveying platform (2); a sensor mounting plate (11) is provided on the side of the L-shaped conveying platform (2); a slot-shaped deceleration photoelectric sensor (12), a slot-shaped rise stop photoelectric sensor (13) and a slot-shaped descend stop photoelectric sensor (14) are provided on the sensor mounting plate (11); The photoelectric sensor (14) sends a deceleration signal when the slot-type deceleration photoelectric sensor (12) detects the shading plate on the vertical part of the L-shaped frame (1). The slot-type rising stop photoelectric sensor (13) and the slot-type descending stop photoelectric sensor (14) respectively control the start and stop of the rising and descending of the L-shaped conveying platform (2). The driving motor (3) is provided with a speed sensor. The weight sensor, the slot-type deceleration photoelectric sensor (12), the slot-type rising stop photoelectric sensor (13), the slot-type descending stop photoelectric sensor (14) and the speed sensor are all electrically connected to the PLC controller.

2. The high-speed cantilever reciprocating hoist according to claim 1, characterized in that: The inner side of the synchronous belt (6) is provided with belt teeth, the rim of the synchronous belt pulley (5) is provided with tooth grooves, and the synchronous belt (6) is tightly meshed with the tooth grooves of the synchronous belt pulley (5) through the belt teeth.

3. The high-speed cantilever reciprocating hoist according to claim 1, characterized in that: A keyway is provided on the inner side of the hub of the synchronous pulley (5), a convex key is provided on the outer side of the transmission shaft (4), and the synchronous pulley (5) is positioned via the keyway and the convex key of the transmission shaft (4).

4. The high-speed cantilever reciprocating hoist according to claim 1, characterized in that: A first lifting bracket (201) is fixedly provided at the upper end of the L-shaped conveying platform (2), a first lifting eye bolt (601) is fixedly provided at one end of the synchronous belt (6), and the first lifting eye bolt (601) is sleeved and fixed on the first lifting bracket (201), a second lifting bracket (701) is fixedly provided at the upper end of the counterweight (7), and a second lifting eye bolt (602) is fixedly provided at the other end of the synchronous belt (6), and the second lifting eye bolt (602) is sleeved and fixed on the second lifting bracket (701).

5. The high-speed cantilever reciprocating hoist according to claim 4, characterized in that: A spring is provided upward at the lower end of the inner ring of the first lifting eye bolt (601), and a chain break detection sleeve is fixedly provided at the upper end of the spring. The chain break detection sleeve is pressed against the upper end of the inner ring of the first lifting bracket (201), and the chain break detection sleeve is electrically connected to a tension sensor, and the tension sensor is electrically connected to a PLC controller.

6. The high-speed cantilever reciprocating hoist according to claim 1, characterized in that: A belt conveyor (16) is provided on the horizontal section frame of the L-shaped conveying platform (2), wherein the belt conveyor (16) comprises a frame (1601), rollers (1602), a conveyor belt (1603) and a conveying motor (1604), wherein the conveyor belt (1603) is tightly sleeved on the rollers (1602) at the front and rear sides of the frame (1601), and the rollers (1602) are driven by the conveying motor (1604).

7. The high-speed cantilever reciprocating hoist according to claim 1, characterized in that: The sensor mounting plate (11) is provided with a counting detection sensor (15). Each time the goods pass through the notch of the counting detection sensor (15), the counting detection sensor (15) sends a pulse signal to the PLC controller and counts, so as to count the number of goods transported by the L-shaped conveying platform (2).

8. The high-speed cantilever reciprocating hoist according to claim 1, characterized in that: The brackets on both sides of the bottom of the L-shaped conveying platform (2) are provided with pallet position detection sensors, and the pallet position detection sensors are electrically connected to the PLC controller to detect whether there are protrusions on the pallet.

9. The high-speed cantilever reciprocating hoist according to claim 1, characterized in that: A floor photoelectric sensor is provided on the side of the L-shaped conveying platform (2), and a plurality of floor photoelectric sensing devices are evenly provided vertically on the vertical portion of the L-shaped frame (1). The floor photoelectric sensor cooperates with the floor photoelectric sensing device, and the floor photoelectric sensor and the floor sensing device are both electrically connected to the PLC controller to confirm the floor number where the L-shaped conveying platform (2) is located.

10. The high-speed cantilever reciprocating hoist according to claim 1, characterized in that: The L-shaped conveying platform (2) is provided with a speed limiter and a safety clamp, wherein the speed limiter is electrically connected to a PLC controller, and the speed limiter and the safety clamp are connected via a lifting mechanism. When the speed of the L-shaped conveying platform (2) exceeds a specified value, the PLC controller controls the speed limiter to pull up the safety clamp via the lifting mechanism, so that the safety clamp rubs against a vertical slide rail (9) of a vertical portion of the L-shaped frame (1) to brake the L-shaped conveying platform (2).

Images