Elevator and die-casting production line

Abstract

The present disclosure relates to a lifting machine and a die casting production line, the lifting machine comprising a frame, a hopper, a driving motor, a first sensing assembly and a control assembly, the frame comprising a track, the track comprising a rising track section and a falling track section connected in sequence, the hopper being movably connected to the track, the driving motor being used to drive the hopper to reciprocate along the track, the first sensing assembly comprising a first trigger and a first sensing piece, one of the first trigger and the first sensing piece being arranged on the hopper, and the other being arranged at the falling track section and / or the connection between the falling track section and the rising track section, the control assembly comprising a controller and a frequency converter, the controller being signal connected with the first sensing piece, the frequency converter and the driving motor respectively, so as to control the frequency converter to reduce the output frequency of the driving motor when the hopper moves to the first sensing piece in the unloading stroke and the first sensing piece detects the first trigger, through the above arrangement, the mechanical impact on the components of the lifting machine when the hopper is overturned and unloaded is reduced.

Description

Technical Field

[0001] This disclosure relates to the field of die-casting equipment technology, and more specifically, to an elevator and a die-casting production line. Background Technology

[0002] Tower-type melting furnaces are fed by an elevator, which has the function of lifting and tilting the buckets to put the raw materials into the tower. In related technologies, the buckets of the elevator will cause a large mechanical impact on the components of the elevator during the tilting and unloading process. Utility Model Content

[0003] The purpose of this disclosure is to provide an elevator and a die-casting production line, which enables the bucket to decelerate during the tipping and unloading process, thereby reducing the mechanical impact caused by the tipping of the bucket.

[0004] To achieve the above objectives, the first aspect of this disclosure provides a hoist, comprising: A frame, including a track, the track comprising a rising track segment and a descending track segment connected in sequence; A hopper is movably connected to the track; A drive motor is used to drive the hopper to reciprocate along the track; A first sensing component includes a first trigger and a first sensor, wherein one of the first trigger and the first sensor is disposed on the hopper, and the other is disposed on the descending track section and / or at the connection between the descending track section and the ascending track section; and The control component includes a controller and a frequency converter. The controller is signal-connected to the first sensor, the frequency converter, and the drive motor, respectively, to control the frequency converter to reduce the output frequency to the drive motor when the hopper moves during the unloading stroke to the point where the first sensor detects the first trigger.

[0005] With the above configuration, one of the first trigger and the first sensor in the first sensing component is located on the hopper, and the other is located on the descending track and / or the connection between the descending track and the ascending track. During the unloading process, when the hopper is on the descending track and / or the connection between the descending track and the ascending track, the first sensor detects the first trigger and sends feedback to the controller. The controller then controls the frequency converter to reduce the output frequency to the drive motor, thereby reducing the speed of the drive motor. This reduces the speed of the hopper as it moves along the descending track or turns from the ascending track towards the descending track, thus reducing the mechanical impact on the hoist component. Specifically, when the controller receives feedback from the first sensor, it sends a deceleration command to the frequency converter. Upon receiving the deceleration command, the frequency converter reduces the AC frequency output to the stator winding of the drive motor. This causes the synchronous magnetic field speed of the drive motor to momentarily drop below the actual rotor speed of the drive motor maintained by the inertia of the hopper, forcing the drive motor to enter a power generation mode. This generates a braking torque opposite to the original rotation direction, effectively suppressing the hopper's movement speed and achieving smooth deceleration.

[0006] In some possible implementations, the first sensing component further includes a second sensing element that cooperates with the first trigger element disposed on the hopper. The second sensing element is disposed on the descending track section and located below the first sensing element. The controller is signal-connected to the second sensing element to control the output frequency of the frequency converter to drop to zero when the hopper moves to the point where the second sensing element detects the first trigger element during the unloading stroke, so that the drive motor stops supplying power to the hopper for stopping the hopper; or, The first sensing component includes a second trigger, which is disposed on the descending track section and located below the first trigger. The second trigger cooperates with a first sensing element disposed on the hopper to control the output frequency of the frequency converter to drop to zero when the hopper moves to the point where the first sensing element detects the second trigger during the unloading stroke, so that the drive motor stops providing power to the hopper for stopping the hopper.

[0007] In some possible implementations, the first sensor is located at the connection between the descending track section and the ascending track section, and the second sensor is spaced apart from the end of the descending track section. This arrangement allows sufficient reaction time for components such as the hoist's controller, frequency converter, drive motor, and brake, thereby ensuring that during the unloading stroke, from the time the second sensor detects the first trigger until the bucket stops moving, the bucket can avoid colliding with the end of the descending track section and causing damage to it; or, The first trigger is located at the connection between the descending track section and the ascending track section, and there is a gap between the second trigger and the end of the descending track section. This arrangement allows sufficient reaction time for the controller, frequency converter, drive motor, brake, and other components of the hoist. As a result, during the unloading stroke, from the time the second sensor detects the first trigger until the bucket stops moving, the bucket can avoid hitting the end of the descending track section and causing damage to it.

[0008] In some possible implementations, the first sensing component includes a third sensor disposed on the ascending track section. The third sensor cooperates with a first trigger disposed on the hopper. The controller is signal-connected to the third sensor to control the frequency converter to reduce the output frequency to the drive motor when the hopper moves to the point where the third sensor detects the first trigger during the reset stroke. This reduces the speed of the hopper moving on the ascending track section during the reset stroke, thereby decelerating the hopper during the reset stroke. Alternatively, The first sensing component includes a third trigger on the ascending track section. The third trigger cooperates with a first sensing element on the hopper to control the frequency converter to reduce the output frequency to the drive motor when the hopper moves to the point where the first sensing element detects the third trigger during the reset stroke. This reduces the speed of the hopper on the ascending track section during the reset stroke, thereby decelerating the hopper during the reset stroke and facilitating subsequent stopping of the hopper.

[0009] In some possible implementations, the ascending track segment includes a straight section and a curved section, with the curved section connecting the straight section and the descending track segment. The third sensing element or the third trigger element is disposed on the straight section. This arrangement allows the bucket to move rapidly in the descending track segment, the curved section, and part of the straight section, shortening the time the bucket moves during the reset stroke and improving the working efficiency of the elevator. Furthermore, during the bucket's unloading stroke, the curved section guides the bucket to smoothly transition from vertical lifting to tipping unloading, avoiding the massive mechanical impact and vibration on the elevator components caused by instantaneous tipping.

[0010] In some possible implementations, the first sensing component includes a fourth sensor disposed on the ascending track section, the fourth sensor being located below the third sensor, the fourth sensor cooperating with a first trigger disposed on the hopper, and the controller being signal-connected to the fourth sensor to control the output frequency of the frequency converter to drop to zero when the hopper moves to the point where the fourth sensor detects the first trigger during its reset stroke, thereby causing the drive motor to stop supplying power to the hopper for stopping the hopper; or, The first sensing component includes a fourth trigger located on the rising track section, the fourth trigger being below the third trigger, and the fourth trigger cooperating with a first sensing element located on the hopper to control the output frequency of the frequency converter to drop to zero when the hopper moves to the point where the first sensing element detects the fourth trigger during the reset stroke, so that the drive motor stops providing power to the hopper for stopping the hopper.

[0011] In some possible implementations, the first sensing element includes a position sensor, and the first trigger element is formed in or detachably connected to the hopper or the track to cooperate with the position sensor, such that the first trigger element can trigger the position sensor to detect the position of the hopper.

[0012] In some possible implementations, the position sensor includes a proximity switch, a photoelectric sensor, or a Hall switch.

[0013] In some possible implementations, the track includes a track groove, and the hopper includes a rolling element movably disposed within the track groove. The hopper includes a bracket for mounting the rolling element, the first trigger element is disposed on the bracket, and the first sensor element is disposed on the outer wall of the track. This arrangement facilitates the first sensor element to detect the first trigger element and avoids the first sensor element from obstructing the movement of the hopper.

[0014] In some possible implementations, the frame includes a mounting frame, the track is disposed on the front side of the mounting frame, the mounting frame is provided with a transmission mechanism, and the drive motor drives the hopper to move through the transmission mechanism, so that the drive motor can drive the hopper to reciprocate along the track through the transmission mechanism.

[0015] In some possible implementations, the transmission mechanism includes a drive sprocket, a driven sprocket, and a chain surrounding the drive sprocket and the driven sprocket, the drive motor is connected to the drive sprocket, and the hopper has a connector connected to the chain, thus enabling the hopper to transport materials more efficiently.

[0016] In some possible implementations, the hopper has a bottom wall and a side wall connected to the bottom wall. The hopper has a rolling element movably connected to the track. Both the rolling element and the connecting element are disposed on the side wall. The rolling element is located above the connecting element. This arrangement makes it easier to guide the hopper to tilt and unload during the unloading stroke.

[0017] A second aspect of this disclosure provides a die-casting production line, including a melting furnace and an elevator as provided in the first aspect, the elevator supplying material to the melting furnace via the hopper.

[0018] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of the hoist provided in an exemplary embodiment of this disclosure; Figure 2 This is a top view of the hoist provided in an exemplary embodiment of this disclosure; Figure 3 This is provided in the exemplary embodiments of this disclosure. Figure 2 AA section view in the middle; Figure 4 The exemplary embodiments provided in this disclosure are different from those provided in this disclosure. Figure 1 and Figure 2 A schematic diagram of the lifting mechanism for viewing angles; Figure 5 This is provided in the exemplary embodiments of this disclosure. Figure 4 A partial schematic diagram of position B in the diagram; Figure 6 This is a schematic block diagram of the electrical connections of some components of the hoist provided in an exemplary embodiment of this disclosure; Figure 7 This is a signal connection block diagram of the controller, frequency converter, brake, drive motor and various sensors provided in the exemplary embodiments of this disclosure.

[0020] Explanation of reference numerals in the attached figures 10-Frame; 11-Mounting frame; 12-Railway; 12a-Railway groove; 121-Rising track section; 1211-Straight section; 1212-Curved section; 122-Rising track section; 20-Hopper; 20a-Bottom wall; 20b-Side wall; 21-Bracket; 22-Rolling element; 23-Connector; 30-First sensing component; 31-First trigger element; 32-First sensing element; 33-Second sensing element; 34-Third sensing element; 35-Fourth sensing element; 40-Drive motor; 41-Motor shaft; 50-Transmission mechanism; 51-Drive sprocket; 52-Chain; 53-Driven sprocket; 60-First limit switch; 70-Emergency stop trigger element; 80-Second limit switch; 90-Controller; 100-Frequency converter; 200-Brake; 1000-Elevator. Detailed Implementation

[0021] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0022] In this disclosure, the term "upper and lower direction" is used to refer to the hoist, where the upper direction refers to the top of the hoist in its normal operating state, and the lower direction refers to the bottom of the hoist in its normal operating state. Unless otherwise stated, directional terms such as "inner" and "outer" refer to the inner and outer contours relative to the component or structure itself. Furthermore, it should be noted that terms such as "first" and "second" are used to distinguish one element from another and do not indicate sequence or importance. Additionally, in the description with reference to the accompanying drawings, the same reference numerals in different drawings denote the same element.

[0023] Tower-type melting furnaces typically use elevators for feeding. These elevators lift and tilt the buckets, feeding raw materials into the tower. To achieve this tilting, the bucket's movement track usually includes an ascending section and a turning descending section. The inventors discovered that the buckets in the elevator typically move at high speeds during the ascending section. Therefore, when the buckets turn from the ascending section to the descending section, this high speed causes significant mechanical impact on the buckets themselves (e.g., guide wheels), the transmission mechanism, and the track, easily damaging the elevator components. In die-casting production lines, elevators often carry tons of material, resulting in even greater impact during the unloading process and making them even more susceptible to damage.

[0024] Based on this, such as Figures 1 to 7 As shown, the first aspect of this disclosure provides a hoist 1000, including a frame 10, a hopper 20, a drive motor 40, a first sensing component 30, and a control component. The frame 10 includes a track 12, which includes a rising track section 121 and a descending track section 122 connected in sequence. The hopper 20 is movably connected to the track 12. The drive motor 40 drives the hopper 20 to reciprocate along the track 12. The first sensing component 30 includes a first trigger element 31 and a first sensing element 32. One of the first sensor 32 is disposed on the hopper 20, and the other is disposed on the descending track section 122 and / or the connection between the descending track section 122 and the ascending track section 121. The control component includes a controller 90 and a frequency converter 100. The controller 90 is connected to the first sensor 32, the frequency converter 100 and the drive motor 40 respectively, so as to control the frequency converter 100 to reduce the output frequency of the drive motor 40 when the hopper 20 moves to the point where the first sensor 32 detects the first trigger 31 during the unloading stroke.

[0025] The unloading stroke of the hopper 20 is as follows: the hopper 20 moves from the bottom end of the rising track section 121 to the top end of the rising track section 121, then moves through the connection between the rising track section 121 and the falling track section 122 to the falling track section 122, and moves along the falling track section 122 toward the end of the falling track section 122 until the hopper 20 completes the flipping action and stops moving at the preset parking position, at which point the hopper 20 completes the unloading stroke.

[0026] With the above configuration, one of the first trigger 31 and the first sensor 32 in the first sensing component 30 is disposed on the hopper 20, and the other is disposed on the descending track 12 and / or the connection between the descending track 12 and the ascending track 12. During the unloading process of the hopper 20, when the hopper 20 is located at the connection between the descending track 12 and / or the ascending track 12, the first sensor 32 detects the first trigger 31 and feeds back to the controller 90. The controller 90 controls the frequency converter 100 to reduce the output frequency to the drive motor 40, thereby reducing the speed of the drive motor 40. This reduces the speed of the hopper 20 as it moves downward on the descending track 12 or turns from the ascending track 12 towards the descending track 12, thereby reducing the mechanical impact on the elevator 1000 components. When the controller 90 receives feedback from the first sensor 32, it sends a deceleration command to the frequency converter 100. After receiving the deceleration command, the frequency converter 100 reduces the frequency of the AC power output to the stator winding of the drive motor 40. This causes the synchronous magnetic field speed of the drive motor 40 to drop instantaneously below the actual rotor speed of the drive motor 40 maintained by the inertia of the hopper 20, forcing the drive motor 40 to enter the power generation mode. This causes the drive motor 40 to generate a braking torque opposite to the original rotation direction, effectively suppressing the moving speed of the hopper 20 and achieving smooth deceleration.

[0027] In the above embodiment, the process of the hopper 20 moving downward on the descending track 12 or turning from the ascending track 12 toward the descending track 12 is the process of the hopper 20 of the elevator 1000 flipping and unloading, that is, the mechanical impact on the components of the elevator 1000 can be reduced during the process of the hopper 20 of the elevator 1000 flipping and unloading.

[0028] Of course, with the above settings, the current surge to the motor can also be reduced as the hopper 20 moves from the rising track 12 toward the falling track 12.

[0029] It should be noted that the controller 90 described above can be any suitable controller 90 from related technologies; for example, the controller 90 can be a PLC controller 90. The drive motor 40 can drive the hopper 20 to move via a reducer (not shown).

[0030] Furthermore, if either the first trigger 31 or the first sensor 32 is located at the connection between the descending track section 122 and / or the ascending track section 121, and the first sensor 32 detects the first trigger 31, the position of the hopper 20 can be the upper deceleration trigger position of the elevator 1000.

[0031] In some implementations, such as Figure 1 , Figure 3 , Figure 4 as well as Figure 7 As shown, when the first trigger 31 of the first sensing component 30 is disposed on the hopper 20 and the first sensing element 32 is disposed on the descending track section 122 and / or at the connection between the descending track section 122 and the ascending track section 121, the first sensing component 30 also includes a second sensing element 33 that cooperates with the first trigger 31 disposed on the hopper 20. The second sensing element 33 is disposed on the descending track section 122 and located below the first sensing element 32. The controller 90 is signal-connected to the second sensing element 33 so that when the hopper 20 moves to the point where the second sensing element 33 detects the first trigger 31 during the unloading stroke, the controller controls the output frequency of the frequency converter 100 to be zero.

[0032] In the above embodiment, the second sensor 33 is disposed on the descending track section 122 and located below the first sensor 32. During the unloading stroke of the hopper 20, when the hopper 20 moves towards the end of the descending track section 122, and the second sensor 33 detects the first trigger 31, the second sensor 33 feeds back to the controller 90. The controller 90 controls the output frequency of the frequency converter 100 to be zero, so that the drive motor 40 stops providing power to the hopper 20 for stopping the hopper 20.

[0033] In addition, in some possible embodiments, the elevator 1000 also includes a brake 200, which is signal-connected to the controller 90. During the unloading stroke of the hopper 20, when it moves towards the end of the descending track section 122, and the hopper 20 moves to the point where the second sensor 33 detects the first trigger 31, the controller 90 controls the output frequency of the frequency converter 100 to be zero. Then, the controller 90 controls the brake 200 to hold the drive motor 40 shaft or the reducer shaft to lock the position of the hopper 20, thereby stopping the hopper 20.

[0034] It should be understood that using brake 200 to decelerate or lock the motor or reducer is a common technical means in related technologies, and will not be elaborated here.

[0035] In addition, in this embodiment, when the second sensor 33 is disposed on the descending track section 122 and the second sensor 33 detects the first trigger 31, the position of the hopper 20 can be the upper stop trigger position.

[0036] In some other possible implementations, when the first sensing element 32 of the first sensing component 30 is disposed in the hopper 20 and the first trigger 31 is disposed at the connection between the descending track section 122 and / or the descending track section 122 and the ascending track section 121, the first sensing component 30 includes a second trigger. The second trigger is disposed in the descending track section 122 and located below the first trigger 31. The second trigger cooperates with the first sensing element 32 disposed on the hopper 20 to control the output frequency of the frequency converter 100 to be zero when the hopper 20 moves to the point where the first sensing element 32 detects the second trigger during the unloading stroke.

[0037] As mentioned above, the first sensor 32 is signal-connected to the controller 90. Thus, when the hopper 20 moves towards the end of the descending track section 122 during its unloading stroke, and the hopper 20 moves to the point where the first sensor 32 detects the second trigger, the first sensor 32 sends feedback to the controller 90. The controller 90 controls the output frequency of the frequency converter 100 to zero, so that the drive motor 40 stops providing power to the hopper 20, thereby stopping the hopper 20.

[0038] In addition, in some possible embodiments, the elevator 1000 also includes a brake 200, which is signal-connected to the controller 90. When the first sensor 32 detects the second trigger during the unloading stroke of the hopper 20, the first sensor 32 feeds back to the controller 90. The controller 90 controls the output frequency of the frequency converter 100 to be zero. Then, the controller 90 controls the brake 200 to hold the motor shaft 41 or the reducer shaft of the drive motor 40 to lock the position of the hopper 20.

[0039] It should be understood that using brake 200 to decelerate or lock the motor or reducer is a common technical means in related technologies, and will not be elaborated here.

[0040] In addition, in this embodiment, the second trigger is set in the descending track section 122. When the first sensor 32 detects the second trigger, the position of the hopper 20 is the upper stop trigger position of the elevator 1000.

[0041] In some implementations, such as Figure 1 and Figure 3 As shown, when the first sensing component 30 includes a first trigger 31, a first sensing component 32 and a second sensing component 33, and the first trigger 31 is disposed on the hopper 20, the first sensing component 32 is disposed at the connection between the descending track section 122 and the ascending track section 121, and the second sensing component 33 is disposed on the descending track section 122 and has a gap between it and the end of the descending track section 122.

[0042] In the above embodiment, the first sensing element 32 is disposed at the connection between the descending track section 122 and the ascending track section 121, so that when the hopper 20 moves from the bottom end of the ascending track section 121 to the connection between the descending track section 122 and the ascending track section 121 during the unloading stroke, the first sensing element 32 detects the first trigger element 31 and feeds back to the controller 90. The controller 90 controls the frequency converter 100 to reduce the output frequency to the drive motor 40, so that the drive motor 40 can decelerate the hopper 20 in time, so that the hopper 20 can decelerate in time during the flipping process, thereby reducing the mechanical impact on the components of the elevator 1000 more timely and effectively.

[0043] Furthermore, the second sensor 33 is disposed on the descending track section 122 and has a gap between it and the end of the descending track section 122. Thus, when the hopper 20 moves to the point where the second sensor 33 detects the first trigger 31 during the unloading stroke, sufficient reaction time is provided for the controller 90, frequency converter 100, drive motor 40, and brake 200 of the elevator 1000. This ensures that during the unloading stroke, from the time the second sensor 33 detects the first trigger 31 until the hopper 20 stops moving, the hopper 20 can avoid colliding with the end of the descending track section 122 and causing damage to the descending track section 122.

[0044] Furthermore, during the unloading stroke of the hopper 20, the hopper 20 first moves along the ascending track section 121, then passes the connection between the ascending track section 121 and the descending track section 122, and then moves towards the end of the descending track section 122. The first sensor 32 is located at the connection between the descending track section 122 and the ascending track section 121, and the second sensor 33 is located on the descending track section 122. This allows the hopper 20 to move during the unloading stroke until the first sensor 32 detects the first trigger 31 and decelerates, and then the hopper 20 moves until the second sensor 33 detects the first trigger 31 and stops. This configuration allows the hopper 20 to decelerate before stopping, reducing the difficulty of stopping and achieving a smoother stop.

[0045] In some other embodiments not shown, the first sensing component 30 includes a first sensing element 32, a first trigger element 31, and a second trigger element. When the first sensing element 32 is disposed in the hopper 20, the first trigger element 31 is disposed at the connection between the descending track section 122 and the ascending track section 121, and the second trigger element is disposed in the descending track section 122 and has a gap between it and the end of the descending track section 122.

[0046] In the above embodiment, the first trigger 31 is disposed at the connection between the descending track section 122 and the ascending track section 121, so that when the hopper 20 moves to the connection between the descending track section 122 and the ascending track section 121 during the unloading stroke, the first sensor 32 detects the first trigger 31 and feeds back to the controller 90. The controller 90 instructs the frequency converter 100 to reduce the output frequency to the drive motor 40, so that the drive motor 40 can decelerate the hopper 20 in time, so that the hopper 20 can decelerate in time during the flipping process, thereby reducing the mechanical impact on the components of the elevator 1000 more timely and effectively.

[0047] Furthermore, there is a gap between the second trigger and the lowering track segment 122 and the end of the lowering track segment 122. In this way, when the hopper 20 moves to the point where the first sensor 32 detects the second trigger during the unloading stroke, sufficient reaction time is provided for the controller 90, frequency converter 100, drive motor 40, and brake 200 of the elevator 1000. This ensures that during the unloading stroke, from the time the first sensor 32 detects the second trigger until the hopper 20 stops moving, the hopper 20 can avoid colliding with the end of the lowering track segment 122 and causing damage to it.

[0048] Furthermore, during the unloading stroke of the hopper 20, the hopper 20 first moves along the ascending track section 121, then passes the connection between the ascending track section 121 and the descending track section 122, and then moves towards the end of the descending track section 122. The first trigger 31 is located at the connection between the descending track section 122 and the ascending track section 121, and the second trigger is located on the descending track section 122. This allows the hopper 20 to move during the unloading stroke until the first sensor 32 detects the first trigger 31 and decelerates, and then the hopper 20 moves until the first sensor 32 detects the second trigger and stops. This configuration allows the hopper 20 to decelerate before stopping, reducing the difficulty of stopping and achieving a smoother stop.

[0049] In some implementations, such as Figure 1 and Figure 3 As shown, when the first sensing component 30 includes a first trigger 31, a first sensing element 32, and a second sensing element 33, and the first trigger 31 is disposed in the hopper 20, the first sensing component 30 also includes a third sensing element 34 disposed on the rising track section 121. The third sensing element 34 cooperates with the first trigger 31 disposed on the hopper 20. The controller 90 is signal-connected to the third sensing element 34 so that when the hopper 20 moves to the point where the third sensing element 34 detects the first trigger 31 during the reset stroke, the controller controls the frequency converter 100 to reduce the output frequency to the drive motor 40.

[0050] The reset stroke of the hopper 20 is as follows: after the hopper 20 has finished unloading, it moves from the position of the descending track section 122 to the connection between the descending track section 122 and the ascending track section 121. After passing the connection, it enters the ascending track section 121 and moves towards the bottom of the ascending track section 121 until it reaches the preset stopping position of the hopper 20 and stops moving. The reset stroke of the hopper 20 is then completed.

[0051] In the above embodiment, during the reset stroke, when the hopper 20 moves downward on the rising track section 121 to the point where the third sensor 34 detects the first trigger 31, the third sensor 34 feeds back to the controller 90. The controller 90 controls the frequency converter 100 to reduce the output frequency to the drive motor 40, thereby reducing the speed of the drive motor 40. This reduces the speed of the hopper 20 moving on the rising track section 121 during the reset stroke, thus decelerating the hopper 20 during the reset stroke to facilitate the subsequent stopping of the hopper 20.

[0052] It is understandable that when the third sensor 34 is located on the ascending track section 121 and the third sensor 34 detects the first trigger 31, the position of the hopper 20 can be the lower deceleration trigger position. That is, the hopper 20 decelerates when it moves to the position where the third sensor 34 detects the first trigger 31 during the reset stroke.

[0053] In some other embodiments not shown, when the first sensing component 30 includes a first trigger 31, a second trigger, and a first sensor 32, and the first sensor 32 is disposed in the hopper 20, the first sensing component 30 further includes a third trigger disposed in the rising track section 121. The third trigger cooperates with the first sensor 32 disposed on the hopper 20 to control the inverter 100 to reduce the output frequency to the drive motor 40 when the hopper 20 moves to the point where the first sensor 32 detects the third trigger during the reset stroke.

[0054] In the above embodiment, during the reset stroke, when the hopper 20 moves downward on the rising track section 121 until the first sensor 32 detects the third trigger, the third sensor 34 feeds back to the controller 90. The controller 90 controls the frequency converter 100 to reduce the output frequency to the drive motor 40, thereby reducing the speed of the drive motor 40. This reduces the speed of the hopper 20 on the rising track section 121 during the reset stroke, thus decelerating the hopper 20 during the reset stroke and facilitating the subsequent stopping of the hopper 20.

[0055] It is understandable that when the third trigger is located on the ascending track section 121 and the first sensor 32 detects the third trigger, the position of the hopper 20 can be the lower deceleration trigger position. That is, the hopper 20 decelerates when it moves to the point where the first sensor 32 detects the third trigger during the reset stroke, so as to facilitate the subsequent stopping of the hopper 20.

[0056] In some implementations, such as Figure 1 and Figure 3 As shown, the ascending track segment 121 includes a straight segment 1211 and a curved segment 1212. The curved segment 1212 is connected between the straight segment 1211 and the descending track segment 122. The third sensing element 34 or the third triggering element is disposed on the straight segment 1211. In the reset stroke, driven by the drive motor 40, the hopper 20 first moves from the descending track section 122 to the connection between the descending track section 122 and the upper track section 12. Then, the hopper 20 moves downward along the ascending track section 121 (i.e., the bottom of the elevator 1000). The third sensing element 34 or the third trigger element is set on the straight section 1211, which allows the hopper 20 to move quickly in the descending track section 122, the curved section 1212 and part of the straight section 1211, shortening the time of movement of the hopper 20 in the reset stroke and improving the working efficiency of the elevator 1000. In the unloading stroke of the hopper 20, the setting of the curved section 1212 can guide the hopper 20 to smoothly transition from vertical lifting to tilting unloading, avoiding the huge mechanical impact and vibration of the elevator 1000 components caused by instantaneous tilting.

[0057] In the above embodiments, the third sensing element 34 or the third triggering element is disposed in two ways along the straight section 1211. When the first sensing component 30 includes a first triggering element 31, a first sensing element 32, a second sensing element 33, and a third sensing element 34, and the first triggering element 31 is disposed in the hopper 20, the third sensing element 34 is disposed in the straight section 1211. When the first sensing component 30 includes a first sensing element 32, a first triggering element 31, a second triggering element, and a third triggering element, and the first sensing element 32 is disposed in the hopper 20, the third triggering element is disposed in the straight section 1211.

[0058] In some implementations, such as Figure 1 and Figure 3 As shown, when the first sensing component 30 includes a first trigger 31, a first sensor 32, a second sensor 33, and a third sensor 34, and the first trigger 31 is disposed in the hopper 20, the first sensing component 30 also includes a fourth sensor 35 disposed on the rising track section 121. The fourth sensor 35 is located below the third sensor 34. The fourth sensor 35 cooperates with the first trigger 31 disposed on the hopper 20. The controller 90 is signal-connected to the fourth sensor 35 so that when the hopper 20 moves to the point where the fourth sensor 35 detects the first trigger 31 during the reset stroke, the output frequency of the frequency converter 100 is controlled to drop to zero.

[0059] In the above embodiment, the fourth sensor 35 is disposed on the rising track section 121 and located below the third sensor 34. During the reset stroke, when the hopper 20 moves downward on the rising track section 121 until the fourth sensor 35 detects the first trigger 31, the fourth sensor 35 feeds back to the controller 90. The controller 90 controls the output frequency of the frequency converter 100 to be zero, so that the drive motor 40 stops providing power to the hopper 20 for stopping the hopper 20.

[0060] Furthermore, as mentioned above, in some possible implementations, the elevator 1000 may also include a brake 200, which is signal-connected to the controller 90. When the hopper 20 moves to the point where the fourth sensor 35 detects the first trigger 31 during its reset stroke, the controller 90 controls the output power of the frequency converter 100 to be zero. Then, the controller 90 controls the brake 200 to hold the drive motor 40 shaft or the reducer shaft to lock the position of the hopper 20, thereby stopping the hopper 20.

[0061] It should be understood that using brake 200 to decelerate or lock the motor or reducer is a common technical means in related technologies, and will not be elaborated here.

[0062] In addition, in this embodiment, when the fourth sensor 35 is installed on the rising track section 121 and the fourth sensor 35 detects the first trigger 31, the position of the hopper 20 can be the lower stop trigger position.

[0063] Furthermore, in this embodiment, the fourth sensor 35 is located below the third sensor 34, which allows the hopper 20 to decelerate before stopping during the reset stroke, thereby reducing the difficulty of stopping the hopper 20 of the elevator 1000 and enabling the hopper 20 to stop more smoothly.

[0064] In some other embodiments not shown, when the first sensing component 30 includes a first sensing element 32, a first trigger element 31, a second trigger element, and a third trigger element, and the first sensing element 32 is disposed in the hopper 20, the first sensing element 32 further includes a fourth trigger element disposed on the rising track section 121. The fourth trigger element is located below the third trigger element, and the fourth trigger element cooperates with the first sensing element 32 disposed on the hopper 20 to control the output frequency of the frequency converter 100 to drop to zero when the first sensing element 32 detects the fourth trigger element during the reset stroke of the hopper 20.

[0065] In the above embodiment, the fourth trigger is disposed on the rising track section 121 and located below the third trigger. During the reset stroke, when the hopper 20 moves downward on the rising track section 121 to the point where the first sensor 32 detects the fourth trigger, the first sensor 32 feeds back to the controller 90. The controller 90 controls the output frequency of the inverter 100 to be zero, so that the drive motor 40 stops providing power to the hopper 20 for stopping the hopper 20.

[0066] Furthermore, as mentioned above, in some possible implementations, the elevator 1000 may also include a brake 200, which is signal-connected to the controller 90. When the hopper 20 moves to the point where the first sensor 32 detects the fourth trigger during its reset stroke, the controller 90 controls the inverter 100 to output power to zero. Then, the controller 90 controls the brake 200 to hold the drive motor 40 shaft or the reducer shaft to lock the position of the hopper 20, thereby stopping the hopper 20.

[0067] It should be understood that using brake 200 to decelerate or lock the motor or reducer is a common technical means in related technologies, and will not be elaborated here.

[0068] In addition, in this embodiment, when the fourth trigger is set in the rising track section 121 and the first sensing element 32 detects the fourth trigger, the position of the hopper 20 can be the lower stop trigger position.

[0069] Furthermore, in this embodiment, the fourth trigger is located below the third trigger, which allows the hopper 20 to decelerate before stopping during the reset stroke, thereby reducing the difficulty of stopping the hopper 20 of the elevator 1000 and enabling the hopper 20 to stop more smoothly.

[0070] In some implementations, such as Figure 6 As shown, the main circuit power path of the hoist 1000 is: three-phase power supply → disconnecting switch → fuse → main contactor → frequency converter → drive motor.

[0071] The power supply path for the 200 circuit of the brake is: brake power supply → brake relay → brake.

[0072] The power supply path for the controller's 90-loop circuit is: controller power supply → controller relay → controller.

[0073] The power path for the safety relay is: control power supply → safety relay.

[0074] The safety relays are electrically connected to the main contactor, the controller relay, and the controller relay, respectively.

[0075] In some implementations, such as Figure 1 and Figure 3As shown, the elevator 1000 also includes a frame 10, a first limit switch 60, a second limit switch 80, and an emergency stop trigger 70. The frame 10 includes a mounting bracket 11, the first limit switch 60 and the second limit switch 80 can be respectively mounted on the mounting bracket 11, and the emergency stop trigger 70 is mounted on the hopper 20.

[0076] The first limit switch 60 can be set below the fourth trigger or the fourth sensor 35 of the rising track section 121, and on the moving path of the emergency stop trigger 70 during the reset stroke of the hopper 20. The first limit switch 60 is electrically connected to the safety relay. When the emergency stop trigger 70 collides with the first limit switch 60, the safety relay is activated to control the main contactor, the brake relay and the controller relay to cut off the power supply to the frequency converter 100, the drive motor 40, the brake 200 and the controller 90. The brake 200 is de-energized and engages to lock the position of the drive motor 40 shaft and the hopper 20, thus completing the emergency stop of the hopper 20.

[0077] In addition, the second limit switch 80 can be set above the first sensing element 32 or the first trigger element 31 of the track 12, and on the moving path of the emergency stop trigger element 70 in the unloading stroke of the hopper 20. The second limit switch 80 is electrically connected to the safety relay. When the emergency stop trigger element 70 collides with the second limit switch 80, the safety relay is activated to control the main contactor, the brake relay and the controller relay to activate respectively, so as to cut off the power supply of the frequency converter 100, the drive motor 40, the brake 200 and the controller 90. The brake 200 is de-energized and engages to lock the position of the drive motor 40 shaft and the hopper 20, thus completing the emergency stop of the hopper 20.

[0078] It should be understood that the position of the first limit switch 60 on the frame 10 can be understood as the lower emergency stop trigger position, and the position of the second limit switch 80 on the frame 10 can be understood as the upper emergency stop trigger position, which will not be elaborated here.

[0079] Of course, the elevator 1000 can also control the emergency stop of the hopper 20 via the emergency stop button, which will not be described in detail here.

[0080] In some implementations, such as Figure 1 and Figure 3 As shown, the first sensing element 32 includes a position sensor, and the first trigger element 31 is formed on or detachably connected to the hopper 20 or the track 12 to cooperate with the position sensor. Thus, in this embodiment, the first trigger element 31 can trigger the position sensor to detect the position of the hopper 20.

[0081] In the above embodiments, when the first sensing element 32 is disposed on the track 12, the first triggering element 31 is formed on or detachably connected to the hopper 20; when the first sensing element 32 is disposed on the hopper 20, the first triggering element 31 is formed on or detachably connected to the track 12.

[0082] In some implementations, the position sensor can be constructed in any suitable form. For example, the position sensor may include, but is not limited to, proximity switches, photoelectric sensors, and Hall switches.

[0083] In some embodiments, when the first sensing component 30 includes a first trigger 31, a first sensor 32, a second sensor 33, a third sensor 34, and a fourth sensor 35, the first trigger 31 is formed in or detachably connected to the hopper 20 and cooperates with the first sensor 32, the second sensor 33, the third sensor 34, and the fourth sensor 35, respectively. In addition to the first sensor 32 mentioned above potentially including a position sensor, the second sensor 33, the third sensor 34, and the fourth sensor 35 can all include position sensors, including but not limited to proximity switches, photoelectric sensors, and Hall effect switches.

[0084] In other embodiments, when the first sensing component 30 includes a first sensing element 32, a first trigger element 31, a second trigger element, a third trigger element, and a fourth trigger element, the first sensing element 32 is disposed in the hopper 20, and the first trigger element 31, the second trigger element, the third trigger element, and the fourth trigger element can all be formed on or detachably connected to the track 12. Each of the first, second, third, and fourth trigger elements cooperates with the first sensing element 32. As mentioned above, the first sensing element 32 may include a position sensor.

[0085] In some implementations, such as Figure 1 and Figure 3 As shown, the track 12 includes a track groove 12a, and the hopper 20 includes a rolling element 22 movably disposed within the track groove 12a. The hopper 20 includes a bracket 21 for mounting the rolling element 22, a first trigger element 31 is disposed on the bracket 21, and a first sensor element 32 is disposed on the outer wall of the track 12. This arrangement facilitates the detection of the first trigger element 31 by the first sensor element 32 and prevents the first sensor element 32 from obstructing the movement of the hopper 20.

[0086] In addition, when the first sensing component 30 includes a first trigger 31, a first sensing element 32, a second sensing element 33, a third sensing element 34, and a fourth sensing element 35, the second sensing element 33, the third sensing element 34, and the fourth sensing element 35 may also be disposed on the outer wall of the track 12.

[0087] In some implementations, such as Figure 1and Figure 3 As shown, the frame 10 includes a mounting frame 11, and a track 12 is provided on the front side of the mounting frame 11. A transmission mechanism 50 is provided on the mounting frame 11. The drive motor 40 drives the hopper 20 to move through the transmission mechanism 50, so that the drive motor 40 can drive the hopper 20 to reciprocate along the track 12 through the transmission mechanism 50.

[0088] In some implementations, such as Figure 1 , Figure 3 as well as Figure 5 As shown, the transmission mechanism 50 can be constructed in any suitable form. For example, the transmission mechanism 50 includes a drive sprocket 51, a driven sprocket 53, and a chain 52 surrounding the drive sprocket 51 and the driven sprocket 53. The drive motor 40 is connected to the drive sprocket 51, and the hopper 20 has a connector 23 connected to the chain 52. With this arrangement, the hopper 20 is connected to the chain 52 via the connector 23, and the drive motor 40 drives the drive sprocket 51 to rotate, thereby causing the hopper 20 to reciprocate along the track 12.

[0089] In the above embodiment, the drive motor 40 can drive a connected reducer (not shown), and the reducer drives the drive sprocket 51 to rotate.

[0090] In some implementations, such as Figure 3 As shown, the hopper 20 has a bottom wall 20a and a side wall 20b connected to the bottom wall 20a. The hopper 20 has a rolling element 22 movably connected to the track 12. The rolling element 22 and the connecting element 23 are both disposed on the side wall 20b, and the rolling element 22 is located above the connecting element 23.

[0091] In the above embodiments, the rolling element 22 can be a guide wheel, the opening of the hopper 20 is usually located on the opposite side of the bottom wall 20a, the rolling element 22 and the connecting element 23 are arranged on the side wall 20b of the hopper 20, so that when the material is in the rising track section 121 during the unloading stroke of the hopper 20, the material outlet of the hopper 20 faces upward or tilts upward, so as to avoid the material in the hopper 20 from spilling, so that the hopper 20 can transport the material better.

[0092] In addition, the rolling element 22 is movably disposed in the track groove 12a. The rolling element 22 moves along the track 12. The connecting element 23 is connected to the chain 52 of the transmission mechanism 50 and moves with the chain 52. The rolling element 22 is located above the connecting element 23 and closer to the opening of the hopper 20. During the unloading stroke of the hopper 20, it is easier to guide the hopper 20 to flip and unload.

[0093] The following is in conjunction with the appendix Figure 1 To be continued Figure 7The unloading and resetting processes of the elevator 1000 are briefly described below. The first sensing component 30 includes a first trigger 31, a first sensor 32, a second sensor 33, a third sensor 34, and a fourth sensor 35. The first trigger 31 is located on the hopper 20. The first sensor 32, the second sensor 33, the third sensor 34, and the fourth sensor 35 are all located on the track 12. The first sensor 32 is located at the connection between the ascending track section 121 and the descending track section 122. When the first sensor 32 detects the first trigger 31, the position of the hopper 20 can be the upper deceleration trigger position. When the second sensor 33 detects the first trigger 31, the position of the hopper 20 can be the upper stop trigger position. When the third sensor 34 detects the first trigger 31, the position of the hopper 20 can be the lower deceleration trigger position. When the fourth sensor 35 detects the first trigger 31, the position of the hopper 20 can be the lower stop trigger position.

[0094] Unloading process: When hopper 20 is in the lower stop trigger position, material is added to hopper 20, the elevator 1000 is started, the frequency converter 100 controls the drive motor 40 to rotate forward, the frequency converter 100 increases the output frequency of the drive motor 40, the speed of the drive motor 40 increases, and hopper 20 moves upward along the rising track section 121. The output frequency of the frequency converter 100 to the drive motor 40 remains constant when it reaches the preset frequency, so that the moving speed of hopper 20 increases to the preset speed and maintains the preset speed. When hopper 20 moves to the first sensor 32 and detects the first trigger 31, hopper 20 enters the upper deceleration position. At the high-speed trigger position, the first sensor 32 sends feedback to the controller 90. The controller 90 controls the frequency converter 100 to reduce the frequency output to the drive motor 40, causing the hopper 20 to decelerate. Then, as the hopper 20 continues to move until the second sensor 33 detects the first trigger 31, the hopper 20 is in the upper stop trigger position. The second sensor 33 sends feedback to the controller 90, which then controls the frequency converter 100 to reduce its output power to zero. The controller 90 then controls the brake 200 to engage the motor shaft 41, locking the motor shaft 41 and the hopper 20. When the hopper 20 moves from the upper deceleration trigger position to the upper stop position, the hopper 20 completes its tipping and unloading process. Reset Process: After unloading, hopper 20 remains in the upper stop trigger position. After a preset time, controller 90 controls inverter 100, which in turn controls drive motor 40 to reverse. Inverter 100 increases the output frequency of drive motor 40, increasing its speed. Hopper 20 moves along descending track 122 to the curved section 1212 of ascending track 121, then continues to the straight section 1211 after passing the curved section 1212, and continues downward in the straight section 1211. During this process, the output frequency of inverter 100 to drive motor 40 remains constant when it reaches the preset frequency, ensuring the hopper 20 moves at a certain speed. The speed is increased to a preset speed and maintained at the preset speed. When the hopper 20 moves to the third sensor 34 and detects the first trigger 31, the hopper 20 is in the lower deceleration trigger position. The third sensor 34 feeds back to the controller 90, and the controller 90 controls the frequency converter 100 to reduce the frequency output to the drive motor 40 so that the hopper 20 decelerates. Then the hopper 20 continues to move to the fourth sensor 35 and detects the first trigger 31. The hopper 20 is in the lower stop trigger position. The fourth sensor 35 feeds back to the controller 90, and the controller 90 controls the output power of the frequency converter 100 to be reduced to zero. Then the controller controls the brake 200 to hold the motor shaft 41 to lock the motor shaft 41 and the hopper 20.

[0095] A second aspect of this disclosure provides a die-casting production line, including an elevator 1000 as provided in the first aspect of this disclosure and a melting furnace. The elevator 1000 supplies material to the melting furnace via a hopper 20. The descending track section 122 of the elevator 1000 is positioned close to the feed inlet of the melting furnace. Thus, during the unloading process of the elevator 1000, when the hopper 20 moves from the upper deceleration trigger position to the upper stop trigger position, the hopper 20 tilts to unload the material, pouring it into the melting furnace.

[0096] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0097] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0098] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A hoist, characterized in that, include: A frame, including a track, the track comprising a rising track segment and a descending track segment connected in sequence; A hopper is movably connected to the track; A drive motor is used to drive the hopper to reciprocate along the track; The first sensing component includes a first trigger and a first sensor, one of which is disposed on the hopper and the other is disposed on the descending track section and / or at the connection between the descending track section and the ascending track section. as well as The control component includes a controller and a frequency converter. The controller is signal-connected to the first sensor, the frequency converter, and the drive motor, respectively, to control the frequency converter to reduce the output frequency to the drive motor when the hopper moves during the unloading stroke to the point where the first sensor detects the first trigger.

2. The hoist according to claim 1, characterized in that, The first sensing component further includes a second sensing element that cooperates with the first trigger element disposed on the hopper. The second sensing element is disposed on the descending track section and located below the first sensing element. The controller is signal-connected to the second sensing element to control the output frequency of the frequency converter to drop to zero when the hopper moves to the point where the second sensing element detects the first trigger element during the unloading stroke; or... The first sensing component includes a second trigger element, which is disposed on the descending track section and located below the first trigger element. The second trigger element cooperates with a first sensing element disposed on the hopper to control the output frequency of the frequency converter to drop to zero when the hopper moves during the unloading stroke to the point where the first sensing element detects the second trigger element.

3. The hoist according to claim 2, characterized in that, The first sensor is disposed at the connection between the descending track segment and the ascending track segment, and the second sensor has a gap between it and the end of the descending track segment; or, The first trigger is located at the connection between the descending track segment and the ascending track segment, and the second trigger is spaced apart from the end of the descending track segment.

4. The hoist according to claim 1, characterized in that, The first sensing component includes a third sensor disposed on the rising track section. The third sensor cooperates with a first trigger disposed on the hopper. The controller is signal-connected to the third sensor to control the frequency converter to reduce the output frequency to the drive motor when the hopper moves to the point where the third sensor detects the first trigger during its reset stroke; or... The first sensing component includes a third trigger element disposed on the rising track section. The third trigger element cooperates with a first sensing element disposed on the hopper to control the frequency converter to reduce the output frequency to the drive motor when the hopper moves to the point where the first sensing element detects the third trigger element during the reset stroke.

5. The hoist according to claim 4, characterized in that, The ascending track segment includes a straight segment and a curved segment, the curved segment connecting the straight segment and the descending track segment, and the third sensing element or the third triggering element is disposed on the straight segment.

6. The hoist according to claim 4 or 5, characterized in that, The first sensing component includes a fourth sensor disposed on the rising track section, the fourth sensor being located below the third sensor. The fourth sensor cooperates with a first trigger disposed on the hopper. The controller is signal-connected to the fourth sensor to control the output frequency of the frequency converter to drop to zero when the hopper moves to the point where the fourth sensor detects the first trigger during its reset stroke; or... The first sensing component includes a fourth trigger located on the rising track section, the fourth trigger being below the third trigger, and the fourth trigger cooperating with a first sensing element located on the hopper to control the output frequency of the frequency converter to drop to zero when the hopper moves to the point where the first sensing element detects the fourth trigger during the reset stroke.

7. The hoist according to claim 1, characterized in that, The first sensing element includes a position sensor, and the first trigger element is formed in or detachably connected to the hopper or the track to cooperate with the position sensor.

8. The hoist according to claim 7, characterized in that, The position sensor includes a proximity switch, a photoelectric sensor, and a Hall switch.

9. The hoist according to claim 1, characterized in that, The track includes a track groove, and the hopper includes a rolling element movably disposed within the track groove. The hopper includes a bracket for mounting the rolling element, the first trigger element is disposed on the bracket, and the first sensing element is disposed on the outer wall of the track.

10. The hoist according to claim 1, characterized in that, The frame includes a mounting frame, the track is disposed on the front side of the mounting frame, the mounting frame is provided with a transmission mechanism, and the drive motor drives the hopper to move through the transmission mechanism.

11. The hoist according to claim 10, characterized in that, The transmission mechanism includes a drive sprocket, a driven sprocket, and a chain surrounding the drive sprocket and the driven sprocket. The drive motor is connected to the drive sprocket, and the hopper has a connector connected to the chain.

12. The hoist according to claim 11, characterized in that, The hopper has a bottom wall and a side wall connected to the bottom wall. The hopper has a rolling element movably connected to the track. The rolling element and the connecting element are both disposed on the side wall, and the rolling element is located above the connecting element.

13. A die-casting production line, characterized in that, It includes a melting furnace and an elevator as described in any one of claims 1-12, wherein the elevator supplies material to the melting furnace through the hopper.

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