Material hoist and method of hoisting material
By introducing a return material gap adjustment and overflow discharge mechanism into the bucket elevator, combined with current monitoring and automatic control by the controller, the problems of return material and blockage during the unloading process of the bucket elevator have been solved, thus achieving equipment safety and stable production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUNAN ZOOMLION CONCRETE MASCH STATION EQUIP CO LTD
- Filing Date
- 2023-06-21
- Publication Date
- 2026-06-26
Smart Images
Figure CN116750438B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of conveying mechanism technology, specifically to a material hoist and a material hoisting method. Background Technology
[0002] A bucket elevator is a continuous conveying machine that uses a series of buckets evenly fixed to a chain to vertically lift materials. It is mainly used for vertically conveying powdery, granular, and small lump materials.
[0003] Bucket elevators have advantages such as compact structure, large conveying capacity, high lifting height, wide applicable material temperature range, low drive power, and long service life. They are widely used in industries such as sand and gravel, cement, mining, building materials, chemical, grain, and metallurgy.
[0004] However, bucket elevators are prone to backflow during the unloading process. The returned material accumulates at the bottom, which can cause blockages during prolonged production. This can increase the current of the elevator motor, and in severe cases, damage the equipment and affect production. Summary of the Invention
[0005] The purpose of this invention is to provide a material hoist and a material hoisting method to overcome the shortcomings of the prior art.
[0006] To achieve the above objectives, in a first aspect, the present invention provides a material hoist, comprising:
[0007] The elevator body has a chain-driven bucket inside and a feed inlet and a discharge outlet.
[0008] A return material gap adjustment mechanism is telescopically disposed between the discharge port and the hopper to adjust the gap width between the discharge port and the hopper;
[0009] An overflow discharge mechanism is provided on the overflow channel of the feed inlet, and the overflow discharge mechanism is used to selectively open the overflow channel;
[0010] A current monitor, installed on the hoist body, is used to acquire the operating current of the hoist body; and
[0011] The controller is electrically connected to the return material gap adjustment mechanism, the overflow discharge mechanism, and the current monitor, respectively. The controller is used to control the operation of the return material gap adjustment mechanism and the overflow discharge mechanism according to the operating current.
[0012] As a further improvement to the above technical solution:
[0013] In conjunction with the first aspect, in one possible implementation, the return material gap adjusting mechanism includes:
[0014] A receiving valve plate is slidably mounted on the inclined base plate of the discharge port; and
[0015] A first drive assembly is disposed on the inclined base plate and connected to the receiving valve plate. The first drive assembly is electrically connected to the controller. The first drive assembly is used to drive the receiving valve plate to extend or retract between the discharge port and the hopper located at the discharge port.
[0016] In conjunction with the first aspect, in one possible implementation, the return gap adjustment mechanism further includes a first position sensor, which is disposed on the inclined base plate and electrically connected to the controller. The first position sensor is used to detect the maximum stroke of the receiving valve plate.
[0017] When the receiving valve plate extends to its maximum stroke, the first position sensor sends a first positioning signal, and the controller controls the first drive component to stop driving based on the first positioning signal.
[0018] In conjunction with the first aspect, in one possible implementation, the return gap adjustment mechanism further includes a second position sensor electrically connected to the controller, the first drive assembly having a telescopic rod for driving the receiving valve plate to extend or retract, and the second position sensor for detecting the stroke of the telescopic rod;
[0019] When the telescopic rod extends to its maximum stroke, the second position sensor sends a second positioning signal. The controller is used to control the first drive assembly to stop driving and send a signal to replace the receiving valve plate based on the second positioning signal.
[0020] In conjunction with the first aspect, in one possible implementation, the width of the receiving valve plate is adapted to the width of the inclined base plate.
[0021] In conjunction with the first aspect, in one possible implementation, the casing of the elevator body is provided with an inspection port corresponding to the discharge port, and the inspection port is provided with an openable inspection door.
[0022] In conjunction with the first aspect, in one possible implementation, the overflow discharge mechanism includes:
[0023] An overflow valve is provided on the overflow channel; and
[0024] The second drive component is disposed on the overflow valve and electrically connected to the controller, and is used to drive the overflow valve to open or close.
[0025] In conjunction with the first aspect, in one possible implementation, the current monitor includes a current transformer disposed on the incoming cable of the hoisting motor in the hoisting machine body.
[0026] In conjunction with the first aspect, in one possible implementation, the material hoist further includes a conveying mechanism arranged at the outlet of the overflow channel for receiving and conveying material discharged from the overflow channel.
[0027] To achieve the above objectives, in a second aspect, the present invention also provides a material lifting method, based on the material lifting machine provided according to the first aspect, the material lifting method comprising:
[0028] Obtain the operating current of the hoist body;
[0029] When the operating current is greater than the first threshold, the overflow discharge mechanism is controlled to open the overflow channel;
[0030] When the operating current is greater than the second threshold and less than the first threshold, the return material gap adjustment mechanism is controlled to reduce the gap width between the discharge port and the hopper to a preset width.
[0031] Wherein, the second threshold is less than the first threshold.
[0032] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0033] This invention provides a material hoist and a material hoisting method. The material hoist obtains the operating current of the hoist body through a current monitor. When the operating current increases, it can be determined that there is more material at the bottom of the hoist body, and the hoisting of the bucket is obstructed. Therefore, the gap width between the discharge port and the bucket can be reduced by adjusting the return material gap mechanism to reduce the amount of return material. Alternatively, the overflow discharge mechanism can be used to open the overflow channel on the feed port to discharge the material accumulated at the feed port from the overflow channel, reducing the feed amount and thus reducing the operating load of the material hoist. This allows the material hoist to resume normal operation in a timely manner, prevents material blockage and continuous increase in operating current, protects equipment safety, and ensures safe and orderly production.
[0034] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description
[0035] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention. It should be understood that the following drawings only show some embodiments of the invention and should not be considered as limiting the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:
[0036] Figure 1 This diagram illustrates a modular control system in a material hoist provided by an embodiment of the present invention.
[0037] Figure 2 A schematic diagram of a material hoist provided in an embodiment of the present invention is shown;
[0038] Figure 3 It shows Figure 2 A magnified view of a portion at point A shown;
[0039] Figure 4 It shows Figure 2 A magnified view of a portion of point B shown.
[0040] Explanation of reference numerals in the attached figures:
[0041] 100. Elevator body; 110. Casing; 120. Chain; 130. Hopper; 140. Feed inlet; 141. Overflow channel; 150. Discharge outlet; 151. Inclined bottom plate; 160. Elevator motor; 170. Inspection door;
[0042] 200. Return material gap adjustment mechanism; 210. Receiving valve plate; 220. First drive assembly; 230. First position sensor; 240. Second position sensor;
[0043] 300. Overflow discharge mechanism; 310. Overflow valve; 320. Second drive assembly;
[0044] 400. Current monitor;
[0045] 500, Controller;
[0046] 600. Conveying mechanism. Detailed Implementation
[0047] The specific embodiments of the present invention 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 the scope of the present invention.
[0048] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.
[0049] In the embodiments of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.
[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.
[0051] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0052] The present invention will now be described in detail with reference to the accompanying drawings and exemplary embodiments.
[0053] Example 1
[0054] Please see Figure 1 and Figure 2 This embodiment provides a material hoist for vertical material transfer.
[0055] The material hoist includes a hoist body 100, a return material gap adjustment mechanism 200, an overflow discharge mechanism 300, a current monitor 400, and a controller 500. The hoist body 100 has a housing 110 containing a bucket 130 driven by a chain 120. The chain 120 is driven by two sprockets arranged vertically. The hoist body 100 also includes a hoisting motor 160, which is connected to one of the sprockets, thereby driving the corresponding sprocket to rotate.
[0056] In this embodiment, the housing 110 of the elevator body 100 is provided with a feed inlet 140 and a discharge outlet 150. The feed inlet 140 is located below the discharge outlet 150, and the feed inlet 140 is provided with an overflow channel 141.
[0057] A return material gap adjustment mechanism 200 is disposed at the discharge port 150. Specifically, the return material gap adjustment mechanism 200 is telescopically disposed between the discharge port 150 and the hopper 130 located at the discharge port 150. The return material gap adjustment mechanism 200 adjusts the gap width between the discharge port 150 and the corresponding hopper 130. It can be understood that by adjusting the gap width between the discharge port 150 and the corresponding hopper 130 through the return material gap adjustment mechanism 200, the amount of material returning from the gap when the hopper 130 discharges material from the discharge port 150 can be controlled.
[0058] An overflow discharge mechanism 300 is installed on the overflow channel 141 at the feed inlet 140. The overflow discharge mechanism 300 is used to selectively open the overflow channel 141. Therefore, it can be understood that when the hopper 130 cannot quickly transfer material from the feed inlet 140, causing material accumulation, the overflow discharge mechanism 300 is controlled to open the overflow channel 141, allowing the accumulated material at the feed inlet 140 to be quickly discharged through the overflow channel 141, reducing the operating load of the material elevator.
[0059] A current monitor 400 is installed on the hoist body 100 and is used to obtain the operating current of the hoist body 100.
[0060] Furthermore, the current monitor 400 includes a current transformer, which is installed on the incoming cable of the hoist motor 160 in the hoist body 100, and is used to detect the operating current of the hoist motor 160.
[0061] The controller 500 is electrically connected to the return material gap adjustment mechanism 200, the overflow discharge mechanism 300 and the current monitor 400 respectively. The controller 500 is used to acquire the operating current and control the return material gap adjustment mechanism 200 and the overflow discharge mechanism 300 to perform corresponding actions according to the operating current.
[0062] Optionally, the controller 500 can be selected as a PLC controller.
[0063] Furthermore, this embodiment also provides a material lifting method based on a material hoist.
[0064] The material lifting method includes the following steps:
[0065] S100: Obtain the operating current of the hoist body 100.
[0066] Specifically, the current monitor 400 collects the operating current of the lifting motor 160 in real time and feeds the collected operating current back to the controller 500 for further processing.
[0067] S200: When the operating current is greater than the first threshold, control the overflow discharge mechanism 300 to open the overflow channel 141.
[0068] Here, the collected operating current is set to I, and the first threshold is set to I. N1 , when I>I N1 When this occurs, it indicates that material accumulation at the bottom of the elevator body 100 is severe, obstructing the operation of the hopper 130. At this time, the controller 500 issues a first command, and the overflow discharge mechanism 300, upon receiving this command, executes the action of opening the overflow channel 141. After the overflow channel 141 is opened, the material accumulated in the feed inlet 140 can be quickly discharged, thereby reducing the amount of material entering the elevator body 100 and reducing the operating load. When I≤I N1 At this time, the controller 500 issues a second command to control the overflow discharge mechanism 300 to close the overflow channel 141, ensuring that the feed inlet 140 feeds normally, thereby ensuring the normal and stable operation of the material elevator.
[0069] S300: When the operating current is greater than the second threshold and less than the first threshold, the return material gap adjustment mechanism 200 is controlled to reduce the gap width between the discharge port 150 and the hopper 130 to a preset width. Wherein, the second threshold is less than the first threshold.
[0070] Specifically, the second threshold is set to I. N2 I N2 <I N1 . Therefore, when I>I N2 And I<I N1 This indicates that some material is still accumulated at the bottom of the elevator, but the obstruction of hopper 130 is not severe. At this point, it is only necessary to reduce the amount of material returning to the bottom of hopper 130 during discharge. Thus, when I > I... N2 And I<I N1 When the controller 500 issues a third command, the return material gap adjustment mechanism 200 receives the third command and adjusts the gap width between the discharge port 150 and the corresponding hopper 130 to a preset width L, thereby reducing return material. This preset width L ensures that the return material gap adjustment mechanism 200 does not contact the hopper 130, thus not interfering with the normal operation of the hopper 130. It is understandable that when I < I N2 At this time, the controller 500 issues a fourth command to control the return material gap adjustment mechanism 200 to return to its initial state.
[0071] It should also be noted that the above steps S200 and S300 are not distinguished by their existing order. Steps S200 and S300 can be executed simultaneously, or step S300 can be executed after step S200 is completed.
[0072] In some embodiments, considering that the current of the boost motor 160 may fluctuate, and sometimes the instantaneous current may exceed I... N1 or I N2 This could lead to misjudgment. Therefore, in step S100 above, the collected operating current I is the average value of multiple currents collected within a certain time interval.
[0073] Specifically, for example, N sets of current data are collected within a time period t, namely I1, I2, I3...I N Where, I = (I1 + I2 + I3 ... + I...) N It should be noted that the values of time t and N need to be specifically determined according to the type of material, and the values of time t and N will differ for different materials. Therefore, this embodiment does not limit the values of time t and N.
[0074] In some embodiments, the material hoist further includes a conveying mechanism 600, which is disposed on the foundation and located at the outlet of the overflow channel 141. The conveying mechanism 600 is used to receive and convey the material discharged from the overflow channel 141. Specifically, when the overflow discharge mechanism 300 opens the overflow channel 141, the controller 500 simultaneously controls the conveying mechanism 600 to start, and the conveying mechanism 600 conveys the material discharged from the overflow channel 141 to a designated location, preventing the material from accumulating at the outlet of the overflow channel 141.
[0075] Optionally, the conveying mechanism 600 may be a belt conveyor or a screw conveyor. It should be understood that the above are merely illustrative examples and are not intended to limit the scope of protection of this invention.
[0076] Compared to existing technologies, the material hoist provided in this embodiment obtains the operating current of the hoist body 100 through the current monitor 400. When the operating current increases, it can be determined that there is more material at the bottom of the hoist body 100, and the hoisting of the hopper 130 is obstructed. Therefore, the gap width between the discharge port 150 and the hopper 130 can be reduced by adjusting the return material gap to reduce the amount of return material. Alternatively, the overflow discharge mechanism 300 can open the overflow channel 141 on the feed port 140 to discharge the material accumulated at the feed port 140 from the overflow channel 141, reducing the amount of feed material and thus reducing the operating load of the material hoist. This allows the material hoist to resume normal operation in a timely manner, prevents material blockage and continuous increase in operating current, protects equipment safety, and ensures safe and orderly production.
[0077] Furthermore, the material hoist provided in this embodiment achieves automatic control of the return material gap mechanism and the overflow discharge mechanism 300 through the controller 500, resulting in a high degree of automation and reducing the labor intensity of manual operation. It also avoids downtime caused by material blockage, ensuring high safety performance.
[0078] Example 2
[0079] Please see Figure 1 and Figure 2 This embodiment provides a material hoist. This embodiment is an improvement upon the technology of Embodiment 1 described above. The difference between Embodiment 1 and Embodiment 1 lies in:
[0080] Please refer to the following: Figure 3 In this embodiment, the return material gap adjustment mechanism 200 includes a receiving valve plate 210 and a first drive assembly 220. The receiving valve plate 210 is slidably disposed on the inclined base plate 151 of the discharge port 150, for example, through a slide rail slider assembly. The first drive assembly 220 is disposed on the inclined base plate 151 and connected to the receiving valve plate 210. The first drive assembly 220 is electrically connected to the controller 500 and is used to drive the receiving valve plate 210 to extend or retract between the discharge port 150 and the hopper 130 located at the discharge port 150.
[0081] Optionally, the width of the receiving valve plate 210 is adapted to the width of the inclined base plate 151. This further prevents material from flowing back from both sides of the receiving valve plate 210.
[0082] Furthermore, the return material gap adjustment mechanism 200 also includes a first position sensor 230 and a second position sensor 240. The first position sensor 230 is mounted on the inclined base plate 151 and electrically connected to the controller 500. The first position sensor 230 is used to detect the maximum extension stroke of the receiving valve plate 210. Understandably, when the receiving valve plate 210 extends to its maximum stroke, the first position sensor 230 sends a first positioning signal, and the controller 500 uses this first positioning signal to control the first drive assembly 220 to stop driving.
[0083] Optionally, both the first position sensor 230 and the second position sensor 240 can be selected as limit switches, infrared sensors, or contact sensors, etc.
[0084] The first drive assembly 220 has a telescopic rod for driving the receiving valve plate 210 to extend or retract, and a second position sensor 240 for detecting the stroke of the telescopic rod. When the telescopic rod extends to its maximum stroke, the second position sensor 240 sends a second position signal, and the controller 500 controls the first drive assembly 220 to stop driving and simultaneously sends a signal to replace the receiving valve plate 210 based on the second position signal.
[0085] When the first position sensor 230 sends the first position signal, the extension stroke of the telescopic rod is L1; when the second position sensor 240 sends the second position signal, the extension stroke of the telescopic rod is L2. Under normal circumstances, L1 < L2. When L1 = L2, it can be determined that the receiving valve plate 210 has worn out.
[0086] Optionally, the first drive assembly 220 is a linear motor, an electric cylinder, an electric actuator, or a lead screw motor. In some embodiments, the first drive assembly 220 may also be a telescopic cylinder or a telescopic hydraulic cylinder. It should be understood that the above are merely illustrative examples and are not intended to limit the scope of protection of the present invention.
[0087] Furthermore, the casing 110 of the elevator body 100 is provided with an inspection port (not shown) corresponding to the discharge port 150, and the inspection port is provided with an openable inspection door 170. By opening the inspection door 170, the return material gap adjustment mechanism 200 can be easily maintained and repaired.
[0088] Please refer to the following: Figure 4 In this embodiment, the overflow discharge mechanism 300 includes an overflow valve 310 and a second drive assembly 320. The overflow valve 310 is disposed on the overflow channel 141. The second drive assembly 320 is disposed on the overflow valve 310 and electrically connected to the controller 500, and is used to drive the overflow valve 310 to open or close.
[0089] In some embodiments, the second drive assembly 320 drives the gate of the overflow valve 310 to rotate and open or close. Optionally, the second drive assembly 320 may be a motor, a rotary cylinder, or a rotary hydraulic cylinder. It should be understood that the above are merely illustrative examples and are not intended to limit the scope of protection of the present invention.
[0090] In other embodiments, the second drive assembly 320 drives the gate of the overflow valve 310 to extend or retract, opening or closing. Optionally, the second drive assembly 320 may be a linear motor, an electric cylinder, an electric push rod, a lead screw motor, a telescopic cylinder, or a telescopic hydraulic cylinder. It should be understood that the above are merely illustrative examples and are not intended to limit the scope of protection of the present invention.
[0091] The optional embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above embodiments. Within the scope of the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all fall within the protection scope of the embodiments of the present invention.
[0092] 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, the embodiments of the present invention will not describe the various possible combinations separately.
[0093] Furthermore, various different implementations of the present invention can be combined arbitrarily, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed in the present invention.
Claims
1. A material hoist, characterized in that, include: The elevator body (100) is provided with a bucket (130) driven by a chain (120) inside the elevator body (100), and the elevator body (100) is provided with a feed inlet (140) and a discharge outlet (150). The return material gap adjustment mechanism (200) is telescopically disposed between the discharge port (150) and the hopper (130) to adjust the gap width between the discharge port (150) and the hopper (130); An overflow discharge mechanism (300) is provided on the overflow channel (141) of the feed inlet (140), and the overflow discharge mechanism (300) is used to selectively open the overflow channel (141). A current monitor (400) is installed on the hoist body (100) to obtain the operating current of the hoist body (100); and The controller (500) is electrically connected to the return material gap adjustment mechanism (200), the overflow discharge mechanism (300), and the current monitor (400), respectively. The controller (500) is used to control the return material gap adjustment mechanism (200) and the overflow discharge mechanism (300) according to the operating current. The return material gap adjustment mechanism (200) includes: A receiving valve plate (210) is slidably disposed on the inclined base plate (151) of the discharge port (150); and A first drive assembly (220) is disposed on the inclined base plate (151) and connected to the receiving valve plate (210). The first drive assembly (220) is electrically connected to the controller (500). The first drive assembly (220) is used to drive the receiving valve plate (210) to extend or retract between the discharge port (150) and the hopper (130) located at the discharge port (150).
2. The material hoist according to claim 1, characterized in that, The return material gap adjustment mechanism (200) further includes a first position sensor (230), which is disposed on the inclined base plate (151) and electrically connected to the controller (500). The first position sensor (230) is used to detect the maximum stroke of the receiving valve plate (210) extending. When the receiving valve plate (210) extends to its maximum stroke, the first position sensor (230) sends a first positioning signal, and the controller (500) controls the first drive component (220) to stop driving according to the first positioning signal.
3. The material hoist according to claim 1, characterized in that, The return material gap adjustment mechanism (200) further includes a second position sensor (240) electrically connected to the controller (500), the first drive assembly (220) has a telescopic rod for driving the receiving valve plate (210) to extend or retract, and the second position sensor (240) is used to detect the stroke of the telescopic rod; When the telescopic rod extends to its maximum stroke, the second position sensor (240) sends a second positioning signal, and the controller (500) controls the first drive assembly (220) to stop driving and sends a signal to replace the receiving valve plate (210) according to the second positioning signal.
4. The material hoist according to claim 1, characterized in that, The width of the receiving valve plate (210) is adapted to the width of the inclined base plate (151).
5. The material hoist according to any one of claims 1-4, characterized in that, The housing (110) of the elevator body (100) is provided with an inspection port corresponding to the discharge port (150), and the inspection port is provided with an openable inspection door (170).
6. The material hoist according to claim 1, characterized in that, The overflow discharge mechanism (300) includes: An overflow valve (310) is disposed on the overflow channel (141); and The second drive assembly (320) is disposed on the overflow valve (310) and electrically connected to the controller (500) for driving the overflow valve (310) to open or close.
7. The material hoist according to claim 1, characterized in that, The current monitor (400) includes a current transformer, which is disposed on the incoming cable of the hoisting motor (160) in the hoist body (100).
8. The material hoist according to claim 1, characterized in that, The material hoist also includes a conveying mechanism (600), which is arranged at the outlet of the overflow channel (141) for receiving and conveying the material discharged from the overflow channel (141).
9. A material lifting method, characterized in that, Based on the material hoist according to any one of claims 1-8, the material hoisting method includes: Obtain the operating current of the hoist body (100); When the operating current is greater than the first threshold, the overflow discharge mechanism (300) is controlled to open the overflow channel (141). When the operating current is greater than the second threshold and less than the first threshold, the return material gap adjustment mechanism (200) is controlled to reduce the gap width between the discharge port (150) and the hopper (130) to a preset width. Wherein, the second threshold is less than the first threshold.