Automatic dust removal device for powder tank and powder tank

Abstract

The utility model provides an automatic dust removal device for a powder tank and the powder tank, and relates to the technical field of concrete stirring equipment. The device comprises detection equipment and electric control equipment, the detection equipment is mounted on an ash inlet pipe of the powder tank and is used for detecting the conveying state of the powder tank; the electric control equipment is electrically connected with the detection equipment and dust removal equipment of the powder tank respectively; the electric control equipment is used for controlling the dust removal equipment to remove dust for the powder tank according to a detection result of the detection equipment. According to the automatic dust removal device for the powder tank, the problem of how to provide the low-cost automatic dust removal device for the powder tank is solved.

Description

Technical Field

[0001] This application relates to the field of concrete mixing equipment, and more particularly to an automatic dust removal device for a powder silo and a powder silo. Background Technology

[0002] With the deepening and popularization of green and environmentally friendly concepts, the requirements for dust control in concrete mixing plant powder silos are becoming increasingly stringent. The problem of dust overflow generated in powder silos during transportation is particularly prominent; therefore, implementing dust control measures during transportation is especially important.

[0003] Currently, there are two main methods for controlling the operation of dust removal equipment for powder tanks. The first is the more common purely manual control method, where staff need to conduct regular inspections or manually start / stop the dust removal equipment based on the conveying situation. The second is an unmanned intelligent control system for powder tanks, which can automatically perform dust removal operations according to actual needs. However, the former requires manual operation of multiple powder tanks one by one, which is not only time-consuming and labor-intensive but also carries the risk of missed or false inspections. The latter, while achieving unmanned and intelligent control with a controller at its core, is relatively expensive.

[0004] Therefore, how to provide a low-cost automatic dust removal device for powder hoppers is a problem that this application urgently needs to solve. Utility Model Content

[0005] This application provides an automatic dust removal device for powder hoppers and a powder hopper, in order to solve the problem of how to provide a low-cost automatic dust removal device for powder hoppers.

[0006] The first aspect of this application provides an automatic dust removal device for powder hoppers, the device comprising: detection equipment and electrical control equipment;

[0007] The detection equipment is installed on the ash inlet pipe of the powder hopper and is used to detect the conveying status of the powder hopper.

[0008] The electrical control equipment is electrically connected to the testing equipment and the dust removal equipment of the powder hopper, respectively;

[0009] The electrical control equipment is used to control the dust removal equipment to remove dust from the powder hopper based on the detection results of the detection equipment.

[0010] In one possible design, the detection results include: the powder tank entering the conveying state, and the powder tank entering the non-conveying state;

[0011] The dust removal equipment is either a pulse-jet dust collector or a vibration dust collector;

[0012] When the powder hopper enters the conveying state, the electrical control equipment is used to control the pulse dust collector to remove dust from the powder hopper at regular intervals;

[0013] When the powder hopper is in a non-conveying state, the electrical control equipment is used to periodically control the vibrating dust collector to remove dust from the powder hopper.

[0014] In one possible design, the detection device includes: a clamp fitted onto the ash inlet pipe, and a rotating component hinged to the clamp;

[0015] The rotation angle of the rotating component includes: a first angle and a second angle;

[0016] When the rotation angle is the first angle, the rotating part separates from the inlet of the ash inlet pipe, and the powder hopper enters the conveying state;

[0017] When the rotation angle is the second angle, the rotating part is in contact with the opening of the ash inlet pipe, and the powder hopper enters the non-conveying state.

[0018] In one possible design, the rotating component includes: a connecting plate hinged to the pipe clamp, and a cover plate and a detection switch fixedly mounted on the connecting plate;

[0019] The on / off state of the detection switch includes: first state and second state;

[0020] When the rotation angle is the first angle, the cover plate separates from the pipe opening, and the on / off state enters the first state;

[0021] When the rotation angle is the second angle, the cover plate fits into the pipe opening, and the on / off state enters the second state.

[0022] In one possible design, the detection switch is a limit switch;

[0023] When the rotation angle is the first angle, the push rod of the limit switch separates from the clamp, and the on / off state enters the first state;

[0024] When the rotation angle is the second angle, the push rod of the limit switch is in contact with the pipe clamp, and the on / off state enters the second state.

[0025] In one possible design, the electrical control equipment includes: a time relay and a contactor;

[0026] The time relay is connected in series with the detection switch, and the contactor is connected in series with the dust removal equipment;

[0027] When the time relay is energized, the contactor is energized; when the time relay is de-energized, the contactor is de-energized.

[0028] In one possible design, the dust removal equipment is a pulse-jet dust collector.

[0029] The contactors are connected in series with the dust collector fan and the pulse controller of the pulse dust collector, respectively.

[0030] When the switch enters the first state from the on / off state, the detection switch is turned on.

[0031] In one possible design, the dust removal equipment is a vibrating dust removal equipment;

[0032] The contactor is connected in series with the vibrating motor of the vibrating dust collector.

[0033] When the switch enters the second state from the on / off state, the detection switch is turned on.

[0034] In one possible design, the electrical control device also includes: a manual control switch;

[0035] The manual control switch is connected in series with the contactor and in parallel with the time relay.

[0036] A second aspect of this application provides a powder canister, the powder canister comprising: a dust removal device installed in the powder canister, and an automatic dust removal device for the powder canister, such as any of the first aspects, electrically connected to the dust removal device.

[0037] This application provides an automatic dust removal device for powder hoppers and a powder hopper itself. The device includes: a detection device and an electrical control device; the detection device is installed on the ash inlet pipe of the powder hopper and is used to detect the conveying status of the powder hopper; the electrical control device is electrically connected to both the detection device and the dust removal equipment of the powder hopper; the electrical control device is used to control the dust removal equipment to remove dust from the powder hopper based on the detection results of the detection device. This achieves the following technical effects: by controlling the dust removal equipment to remove dust from the powder hopper based on its conveying status, an automated powder hopper dust removal device is provided; by detecting the conveying status of the powder hopper using the detection device installed on the ash inlet pipe, a low-cost powder hopper dust removal device is provided. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of a scenario for an automatic dust removal device for powder hoppers provided in an embodiment of this application;

[0040] Figure 2 This is a schematic diagram of the structure of the automatic dust removal device for powder hoppers provided in the embodiments of this application;

[0041] Figure 3 This is a schematic diagram of the structure of the testing equipment provided in the embodiments of this application;

[0042] Figure 4 This is a schematic diagram of the structure of the electrical control equipment provided in the embodiments of this application;

[0043] Figure 5A schematic diagram illustrating the control principle of the pulse dust collector provided in the embodiments of this application;

[0044] Figure 6 This is a schematic diagram illustrating the control principle of the vibration dust removal equipment provided in the embodiments of this application.

[0045] Figure label:

[0046] 110-Powder hopper; 111-Ash inlet pipe; 120-Dust removal equipment; 121-Dust removal fan; 122-Pulse controller; 123-Vibration motor; 130-Automatic dust removal device for powder hopper; 131-Detection equipment; 132-Electrical control equipment;

[0047] 210-Pipe clamp; 220-Rotating component; 221-Connecting plate; 222-Cover plate; 223-Detection switch; 230-Time relay; 240-Contactor; 250-Power distribution protection switch; 260-Manual control switch. Detailed Implementation

[0048] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0049] In this application, the terms "first" and "second" are used to distinguish identical or similar items with substantially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, nor do they necessarily imply difference. It should be noted that in this application, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design scheme described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner. In this application, "at least one" means one or more, and "more than one" means two or more.

[0050] It should be noted that the phrase "at the moment when..." in this application can refer to the instant at which a certain situation occurs, or to a period of time after the occurrence of a certain situation; this application does not impose a specific limitation on this. Furthermore, the automatic dust removal device for powder hoppers provided in this application is merely an example; the automatic dust removal device for powder hoppers may also include more or fewer components.

[0051] To facilitate a clear description of the technical solution of this application, some of the terms and technologies involved in this application are briefly introduced below:

[0052] A concrete batching plant is a combined facility used for centralized mixing of concrete, also known as a precast concrete plant. A concrete batching plant consists of a material storage system, a material weighing system, a material conveying system, a mixing unit, an electrical control system, and other auxiliary facilities.

[0053] The conveying status of the powder silo refers to the process by which the powder transport vehicle conveys powder into the powder silo through the powder inlet pipe.

[0054] Pulse jet dust collectors are devices that use high-pressure gases such as compressed air to remove dust from powder containers. They utilize high-pressure gas, which is injected one or more times into the filter bags through pulse valves and blowpipes in a very short time. This causes the filter bags to suddenly expand, and the dust adhering to the outer surface of the filter bags is peeled off by the impact vibration and reverse airflow.

[0055] Vibrating dust collectors are devices that use mechanical vibration, such as eccentric wheels or vibrating motors, to remove dust from powder hoppers. When dust accumulates to a certain level on the surface of the filter media, the vibrating device is activated to cause the filter media to vibrate, thereby causing the dust to fall off the surface of the filter media and into the ash hopper.

[0056] The technical solutions of this application will be described in detail below with reference to specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. This application will now be described with reference to the accompanying drawings.

[0057] To clearly understand the technical solution of this application, the solutions of the prior art will be described in detail first.

[0058] With the deepening and popularization of green and environmentally friendly concepts, the requirements for dust control in concrete mixing plant powder silos are becoming increasingly stringent. The problem of dust overflow generated in powder silos during transportation is particularly prominent; therefore, implementing dust control measures during transportation is especially important.

[0059] Currently, dust collection equipment for powder silos is mainly divided into two types: pulse-jet dust collectors and vibratory dust collectors. Pulse-jet dust collectors require activation during powder / ash conveying. The pulse controller, with preset on / off times, controls the dust collector fan to intermittently and periodically jet dust in a pulse pattern. Vibratory dust collectors require activation before or after powder / ash conveying. During conveying, positive pressure forms inside and outside the powder silo, and vibration at this time may damage the filter element. It is understandable that a powder silo dust collector is one type of dust collector, either pulse-jet or vibratory; both cannot be used simultaneously. The type of dust collector installed is determined during the powder silo installation process.

[0060] There are two main methods for controlling the operation of dust collection equipment in powder silos. The first is the more common purely manual control method, where staff need to conduct regular inspections or manually start / stop the dust collection equipment based on the conveying situation. This method requires monthly or irregular inspections, during which each dust collection silo needs to be briefly manually operated for inspection and maintenance. Simultaneously, when the dust transport vehicle is conveying dust into the silo, the driver manually operates the start / stop switch on the silo's electrical control equipment. The second method is an unmanned intelligent control system for powder silos. This system can automatically execute dust collection operations according to actual needs. It uses a Programmable Logic Controller (PLC) as its core, and through electronic locks and Radio Frequency Identification (RFID) readers installed on the ash inlet pipes of each powder silo, along with an Enterprise Resource Planning (ERP) management system and an industrial control computer, it achieves automated monitoring of dust collection in the powder silos.

[0061] However, purely manual control requires manual operation of multiple powder tanks one by one, resulting in long inspection cycles. Alternatively, when the driver manually operates the switches, unfamiliarity with the operation and the large number of powder tanks can easily lead to operational errors or omissions, affecting the accuracy and timeliness of the operation, thus impacting dust removal efficiency and even damaging the equipment. Therefore, this method is not only time-consuming and labor-intensive but also carries the risk of missed or false inspections. Intelligent control systems, with PLCs at their core, achieve unmanned and intelligent operation, but their construction costs are high, and the subsequent maintenance costs of the hardware and software equipment are also considerable.

[0062] Therefore, in response to the question of how to provide a low-cost automatic dust removal device for powder hoppers, the research found that, in order to solve this problem, the conveying state of the powder hopper is determined by detecting whether the inlet of the ash inlet pipe is open; when the powder hopper is in the conveying state and the dust removal equipment is a pulse dust collector, the powder hopper is dusted by the pulse dust collector; when the powder hopper is in the non-conveying state and the dust removal equipment is a vibration dust collector, the powder hopper is dusted by the vibration dust collector.

[0063] Based on the above-mentioned inventive discovery, the technical solution of this application is proposed.

[0064] The following describes the application scenarios of the automatic dust removal device for powder hoppers provided in this application.

[0065] Figure 1 This is a schematic diagram illustrating a scenario of the automatic dust removal device for powder hoppers provided in an embodiment of this application. It should be noted that... Figure 1 The examples shown are merely examples of scenarios in which this application can be applied, to help those skilled in the art understand the technical content of this application, but do not mean that this application cannot be used in other devices, systems, environments or scenarios.

[0066] like Figure 1 As shown, the application scenarios of the automatic dust removal device for powder tanks include: powder tank 110, dust removal equipment 120 and automatic dust removal device for powder tanks 130.

[0067] Powder silo 110 refers to a container used in concrete mixing plants to store cement and fly ash, among other dust. Powder silo 110 is designed in a cylindrical or similar shape, possessing sufficient strength and sealing to ensure that the dust does not leak or become damp. The bottom or side of powder silo 110 is equipped with a discharge port for conveying the dust to the mixing unit or other points of use. The top or side of powder silo 110 is equipped with an inlet pipe 111 for conveying dust from transport vehicles into the silo of powder silo 110.

[0068] A dust collector 120 is installed in the powder tank 110 to remove dust generated during the use of the powder tank. The dust collector 120 is a pulse dust collector or a vibration dust collector to ensure clean air inside the powder tank 110 and prevent dust from damaging the environment and equipment.

[0069] The automatic dust removal device 130 for powder hoppers is electrically connected to the dust removal equipment 120. The automatic dust removal device 130 is the core of this application scenario, responsible for automatically detecting the dust removal needs of the powder hopper 110 and automatically controlling the dust removal equipment 120 to perform dust removal on the powder hopper 110. The automatic dust removal device 130 includes the detection device 131 and the electrical control device 132 shown in the embodiments of this application.

[0070] The embodiments of this application are described below with reference to the accompanying drawings.

[0071] Figure 2 This is a schematic diagram of the structure of the automatic dust removal device for powder tanks provided in the embodiments of this application. Figure 2 for Figure 1 A magnified view of a portion, such as Figure 1 and Figure 2 As shown, the automatic dust removal device 130 for powder hoppers provided in this application embodiment includes:

[0072] Testing equipment 131 and electrical control equipment 132;

[0073] The detection device 131 is installed on the ash inlet pipe 111 of the powder hopper 110. The detection device 131 is used to detect the conveying status of the powder hopper 110.

[0074] The electrical control device 132 is electrically connected to the detection device 131 and the dust removal device 120 of the powder hopper 110, respectively;

[0075] The electrical control device 132 is used to control the dust removal device 120 to remove dust from the powder tank 110 based on the detection results of the detection device 131.

[0076] Specifically, the detection results of the detection device 131 include: whether the powder tank 110 has entered the conveying state and whether the powder tank 110 has entered the non-conveying state. The detection device 131 is installed on the ash inlet pipe 111. The detection device 131 can be installed outside the ash inlet pipe 111. By using sensors such as laser rangefinders, proximity switches, magnetic sensors, or pressure sensors installed outside the ash inlet pipe 111, it determines whether the pipe opening of the ash inlet pipe 111 is open, and thus determines the conveying state of the powder tank 110. When the pipe opening is open, it indicates that the powder tank 110 has entered the conveying state; when the pipe opening is closed, it indicates that the powder tank 110 has entered the non-conveying state. The detection device 131 can also be installed inside the ash inlet pipe 111. By using sensors such as a dust concentration sensor, an electrostatic induction sensor, an ultrasonic sensor, or a pressure sensor installed inside the ash inlet pipe 111, it can determine whether there is dust inside the ash inlet pipe 111, and thus determine the conveying status of the powder tank 110. When there is dust inside the ash inlet pipe 111, it indicates that the powder tank 110 has entered a non-conveying state; when there is no dust inside the ash inlet pipe 111, it indicates that the powder tank 110 has entered a non-conveying state.

[0077] Electrical control device 132 is electrically connected to detection device 131, and electrical control device 132 obtains the detection results of detection device 131 from detection device 131. Detection device 131 may include a switch, and different detection results of detection device 131 correspond to the on or off state of the switch. Electrical control device 132 directly monitors the voltage or current changes in the circuit connected to the switch to obtain the switching signal of detection device 131, and thus obtains the detection result of detection device 131. Alternatively, electrical control device 132 may contain logic circuitry to process the switching signal from detection device 131, and thus obtain the detection result of detection device 131. Detection device 131 may also include a signal transmitting device, and different detection results of detection device 131 correspond to different communication signals of the signal transmitting device. Electrical control device 132 obtains the detection result of detection device 131 based on the communication signal.

[0078] The electrical control device 132 is electrically connected to the dust removal device 120, and its connection method is similar to that of the electrical connection with the detection device 131, which will not be described again in this embodiment. Based on the detection results of the detection device 131, the electrical control device 132 controls the dust removal device 120 to remove dust from the powder hopper 110. If the detection result indicates that the powder hopper 110 has entered the conveying state, and the dust removal device is a pulse-jet dust collector, the pulse-jet dust collector can be controlled to remove dust from the powder hopper 110; or, if the detection result indicates that the powder hopper 110 has entered the non-conveying state, and the dust removal device is a vibration-jet dust collector, the vibration-jet dust collector can be controlled to remove dust from the powder hopper 110. The control method can be to remove dust once at fixed intervals of conveying frequency, or to remove dust once at fixed time intervals.

[0079] This application provides an automatic dust removal device for powder hoppers. The device includes a detection device and an electrical control device. The detection device is installed on the ash inlet pipe of the powder hopper and is used to detect the conveying status of the powder hopper. The electrical control device is electrically connected to both the detection device and the dust removal equipment of the powder hopper. The electrical control device is used to control the dust removal equipment to remove dust from the powder hopper based on the detection results of the detection device. This achieves the following technical effects: it provides an automated powder hopper dust removal device by controlling the dust removal equipment to remove dust from the powder hopper based on the conveying status of the powder hopper; and it provides a low-cost powder hopper dust removal device by detecting the conveying status of the powder hopper using the detection device installed on the ash inlet pipe.

[0080] In one possible design, the detection results include: powder tank 110 entering the conveying state, and powder tank 110 entering the non-conveying state;

[0081] Dust removal equipment 120 is either a pulse dust collector or a vibration dust collector;

[0082] When the powder hopper 110 enters the conveying state, the electrical control device 132 is used to control the pulse dust collector to remove dust from the powder hopper 110 at regular intervals.

[0083] When the powder hopper 110 is in a non-conveying state, the electrical control device 132 is used to control the vibration dust removal device to remove dust from the powder hopper 110 at regular intervals.

[0084] Specifically, when powder hopper 110 enters the conveying state, it means that the transport vehicle is connected to the ash inlet pipe 111 and conveys powder into powder hopper 110 through the ash inlet pipe 111; when powder hopper 110 enters the non-conveying state, it means that the transport vehicle is disconnected from the ash inlet pipe 111, which can be the state when the conveying state has ended or the state when it has not yet entered the conveying state.

[0085] When the powder tank 110 enters the conveying state, specifically at the moment of entering the conveying state or after a period of time in the conveying state, the electrical control device 132 starts the pulse dust collector and controls the pulse dust collector to remove dust from the powder tank 110; after the pulse dust collector has been running for a period of time, in order to avoid damage to the equipment due to prolonged operation, the electrical control device 132 shuts down the pulse dust collector.

[0086] When the powder tank 110 enters the non-conveying state, specifically at the moment of exiting the conveying state or after a period of time after exiting the conveying state, the electrical control device 132 starts the vibrating dust collector and controls the vibrating dust collector to remove dust from the powder tank 110; after the vibrating dust collector has been running for a period of time, in order to avoid damage to the equipment due to prolonged operation, the electrical control device 132 shuts down the vibrating dust collector.

[0087] In other embodiments, the electrical control device 132 is used to periodically control the dust removal device 120 to remove dust from the powder tank 110, specifically by the electrical control device 132 periodically starting and stopping the dust removal device 120.

[0088] The technical advantages of this application embodiment are: it is compatible with both pulse dust collectors and vibration dust collectors, and has high compatibility compared to purely manual control methods; it achieves automated control of the dust collector while avoiding damage to the dust collector; it eliminates the need for the driver to manually operate the switch, thus avoiding problems such as affecting the dust collection effect or even damaging the equipment.

[0089] Figure 3 This is a schematic diagram of the structure of the detection device provided in an embodiment of this application. Figures 1 to 3 As shown, the testing device 131 includes: a pipe clamp 210 sleeved on the ash inlet pipe 111, and a rotating component 220 hinged to the pipe clamp 210;

[0090] The rotation angle of the rotating component 220 includes: a first angle and a second angle;

[0091] When the rotation angle is the first angle, the rotating component 220 separates from the opening of the ash inlet pipe 111, and the powder tank 110 enters the conveying state.

[0092] When the rotation angle is the second angle, the rotating component 220 is in contact with the opening of the ash inlet pipe 111, and the powder tank 110 enters the non-conveying state.

[0093] Specifically, the detection device 131 is installed on the ash inlet pipe 111 of the powder silo 110, near the inlet of the ash inlet pipe 111. The detection device 131 includes a pipe clamp 210 and a rotating component 220.

[0094] Pipe clamp 210 is a pipe connector. The inner diameter of pipe clamp 210 matches the outer diameter of ash inlet pipe 111 to ensure that pipe clamp 210 can be tightly fitted onto ash inlet pipe 111, thereby ensuring that pipe clamp 210 remains stationary relative to ash inlet pipe 111. Pipe clamp 210 can be directly fixed to ash inlet pipe 111 by fasteners such as bolts and nuts, or indirectly fixed to ash inlet pipe 111 by other auxiliary structures such as brackets or hangers.

[0095] The rotating component 220 provides rotational motion. Due to its hinged connection, the rotating component 220 can flexibly rotate around a certain axis to meet various angle and direction adjustment requirements. When the ash inlet pipe 111 is connected to the ash transport vehicle, the powder tank 110 enters the conveying state. At this time, the rotating component 220 is lifted and separated from the opening of the ash inlet pipe 111. The rotation angle of the rotating component 220 in this state is the first angle mentioned above. When the ash inlet pipe 111 is not connected to the ash transport vehicle, the powder tank 110 enters the non-conveying state. At this time, the rotating component 220 is in a falling state under its own weight and is in contact with the opening of the ash inlet pipe 111; or, under the action of the connectors such as the pipe opening clips, the rotating component 220 is in a stable state and is in contact with the opening of the ash inlet pipe 111. The rotation angle of the rotating component 220 in this state is the second angle mentioned above.

[0096] The technical advantages of this application embodiment are: the rotating component has a simple and reliable structure, and the rotation angle of the rotating component reflects the conveying status of the powder tank.

[0097] In one possible design, the rotating component 220 includes: a connecting plate 221 hinged to the clamp 210, and a cover plate 222 and a detection switch 223 fixedly mounted on the connecting plate 221;

[0098] The on / off state of the detection switch 223 includes: a first state and a second state;

[0099] When the rotation angle is the first angle, the cover plate 222 separates from the pipe opening, and the on / off state enters the first state;

[0100] When the rotation angle is the second angle, the cover plate 222 is in contact with the pipe opening, and the on / off state enters the second state.

[0101] Specifically, the connecting plate 221 is hinged to the pipe clamp 210, and the cover plate 222 is fixedly connected to the connecting plate 221. The connecting plate 221 and the cover plate 222 form an L-shaped plate.

[0102] A detection switch 223 is fixedly installed on the inner side of the connecting plate 221. The on / off state of the detection switch 223 is used to indicate whether the cover plate 222 is in contact with the pipe opening. When the rotation angle of the rotating component 220 is the first angle, the detection switch 223 is reset, and the on / off state of the detection switch 223 enters the first state; wherein, the first state can be either a conducting state or a disconnected state; the first state is used to indicate that the cover plate 222 is separated from the pipe opening, that is, the rotating component 220 is separated from the pipe opening, and thus the powder tank 110 has entered the conveying state. When the rotation angle of the rotating component 220 is the second angle, the detection switch 223 is triggered, and the on / off state of the detection switch 223 enters the second state; wherein, when the first state is a conducting state, the second state is a disconnected state, and vice versa; the second state is used to indicate that the cover plate 222 is in contact with the pipe opening, that is, the rotating component 220 is in contact with the pipe opening, and thus the powder tank 110 has entered the non-conveying state.

[0103] The technical effect of this application embodiment is that the conveying status of the powder tank is reflected by detecting the on / off state of the switch;

[0104] In one possible design, the detection switch 223 is a limit switch;

[0105] When the rotation angle is the first angle, the push rod of the limit switch separates from the clamp 210, and the on / off state enters the first state;

[0106] When the rotation angle is the second angle, the push rod of the limit switch is in contact with the clamp 210, and the on / off state enters the second state.

[0107] Specifically, a limit switch is an electrical switch. The on / off state of the limit switch changes with the rotation angle of the connecting plate 221. When the rotation angle is the first angle, the push rod of the limit switch separates from the clamp 210, equivalent to releasing the push rod, and the limit switch is reset, thus entering the first on / off state. When the rotation angle is the second angle, the push rod of the limit switch is engaged with the clamp 210, equivalent to pressing the push rod, and the limit switch is triggered, thus entering the second on / off state.

[0108] In other embodiments, an operating head is installed on the limit switch. When the rotation angle is a first angle, the operating head of the limit switch is separated from the clamp 210; when the rotation angle is a second angle, the operating head of the limit switch is in contact with the clamp 210.

[0109] In other embodiments, the detection switch 223 is a limit switch. When the rotation angle is a first angle, the limit switch is placed in a first position by the clamp 210; when the rotation angle is a second angle, the limit switch is placed in a second position by the clamp 210.

[0110] Figure 4This is a schematic diagram of the structure of the electrical control device provided in an embodiment of this application. Figures 1 to 4 As shown,

[0111] Electrical control equipment 132 includes: a time relay 230 and a contactor 240;

[0112] Time relay 230 is connected in series with detection switch 223, and contactor 240 is connected in series with dust removal equipment 120;

[0113] When time relay 230 is energized, contactor 240 is energized; when time relay 230 is de-energized, contactor 240 is de-energized.

[0114] Specifically, the electrical control device 132 is a circuit structure that can be located in the electrical control box of the powder silo 110, in the central control room of the concrete mixing plant, or in other feasible locations.

[0115] The electrical control equipment 132 includes a time relay 230 and a contactor 240. The detection switch 223, the time relay 230, the contactor 240 and the dust removal equipment 120 are connected to the AC circuit.

[0116] The time relay 230 is an electrical component that can de-energize after a preset time. When energized, the time relay 230 starts timing; it remains energized until the preset time is reached; after the preset time, the time relay 230 automatically de-energizes. The preset time can be manually set according to the dust removal time of the dust removal equipment 120. The time relay 230 is connected in series with the detection switch 223. When the detection switch 223 is on, the time relay 230 is energized; when the detection switch 223 is off, or when the time relay 230 automatically de-energizes, the time relay 230 de-energizes.

[0117] Contactor 240 is an electrical component capable of remotely controlling dust removal equipment 120. Contactor 240 closes or opens contacts using electromagnetic force. Contactor 240 is connected in series with dust removal equipment 120. When contactor 240 is on, dust removal equipment 120 is energized and starts working; when contactor 240 is off, dust removal equipment 120 is de-energized and stops working.

[0118] The time relay 230 can be connected in series with the contactor 240, that is, the detection switch 223, the time relay 230, the contactor 240, and the dust removal equipment 120 are connected in series. Therefore, when the detection switch 223 is turned on, the time relay 230 is energized and starts timing, and the contactor 240 and the dust removal equipment 120 are energized; when the detection switch 223 is turned off, or when the time relay 230 is automatically de-energized, the time relay 230 is de-energized, causing the contactor 240 and the dust removal equipment 120 to be de-energized.

[0119] The time relay 230 can also be connected in parallel with the contactor 240, meaning the time relay 230 remotely controls the energization and de-energization of the contactor 240; when the time relay 230 is energized, the contactor 240 conducts, and when the time relay 230 is de-energized, the contactor 240 disengages. Therefore, when the detection switch 223 is on, the time relay 230 is energized and starts timing, the contactor 240 conducts, energizing the dust removal equipment 120; when the detection switch 223 is off, or when the time relay 230 automatically de-energizes, the time relay 230 de-energizes, the contactor 240 disengages, de-energizing the dust removal equipment 120. The coordinated control of the time relay 230 and the contactor 240 can be achieved through communication signals and a PLC.

[0120] In other embodiments, the electrical control device 132 also includes a power distribution protection switch 250.

[0121] The technical advantages of this application embodiment are: by detecting the on / off state of the switch, the power supply and power cut-off of the dust removal equipment are controlled, thus realizing the automated control of the dust removal equipment; by controlling the start and stop of the dust removal equipment through time relays and contactors, compared with intelligent management and control systems, complex software and hardware are not required, and the construction cost and subsequent maintenance cost of software and hardware equipment are low.

[0122] In one possible design, the dust removal device 120 is a pulse-jet dust removal device;

[0123] Contactor 240 is connected in series with the dust collector fan and pulse controller of the pulse dust collector, respectively;

[0124] When the on / off state enters the first state, the detection switch 223 is turned on.

[0125] In one possible design, the dust removal device 120 is a vibrating dust removal device;

[0126] Contactor 240 is connected in series with the vibrating motor of the vibrating dust collector;

[0127] When the switch enters the second state from the on / off state, the detection switch 223 is turned on.

[0128] In one possible design, the electrical control device 132 also includes: a manual control switch 260;

[0129] The manual control switch is connected in series with contactor 240 and in parallel with time relay 230.

[0130] Specifically, on-site operators can manually control the dust removal equipment 120 to be powered on and start working, or to be powered off and stop working, as needed. The control method of the manual control switch 260 is similar to that of the detection switch 223, and will not be described in detail in this embodiment.

[0131] The technical effect of this application embodiment is that by manually controlling the on and off of the switch, the power supply and power off of the dust removal equipment can be controlled, thereby realizing on-demand control of the dust removal equipment.

[0132] Figure 5 This is a schematic diagram illustrating the control principle of a pulse-jet dust collector provided in an embodiment of this application. Figure 5 As shown, the dust removal equipment is a pulse dust removal equipment, including a dust removal fan 121 and a pulse controller 122, and the contacts of the detection switch 223 are normally open contacts.

[0133] When the cover plate 222 separates from the opening of the ash inlet pipe 111, the detection switch 223 enters the first state and is turned on; then the time relay 230 is energized and starts timing, with the preset time set to 30 minutes; the contactor 240 is energized, and the dust removal fan 121 and the pulse controller 122 are energized and start working to remove dust from the powder hopper 110.

[0134] If the cover plate 222 is in contact with the pipe opening within 30 minutes, the detection switch 223 enters the second state and disconnects, and the time relay 230 is de-energized. If the cover plate 222 remains separated from the pipe opening after 30 minutes, the time relay 230 automatically de-energizes to prevent damage to the dust removal equipment 120 from prolonged operation. After the time relay 230 is de-energized, the contactor 240 is de-energized, causing the dust removal fan 121 and the pulse controller 122 to be de-energized and stop working.

[0135] Figure 6 This is a schematic diagram illustrating the control principle of the vibration-type dust collector provided in an embodiment of this application. Figure 6 As shown, the dust removal equipment is a vibration dust removal equipment, including a vibration motor 123, and the contacts of the detection switch 223 are normally closed contacts.

[0136] When the cover plate 222 is in contact with the opening of the ash inlet pipe 111, the detection switch 223 enters the second state and is turned on; then the time relay 230 is energized and starts timing, with the preset time set to 1 minute; the contactor 240 is energized, the vibration motor 123 is energized and starts working to remove dust from the powder hopper 110.

[0137] If the cover plate 222 separates from the pipe opening within one minute, the detection switch 223 enters the first state and disconnects, and the time relay 230 is de-energized. If the cover plate 222 remains in contact with the pipe opening after one minute, the time relay 230 automatically de-energizes to prevent damage to the dust removal equipment 120 from prolonged operation. After the time relay 230 is de-energized, the contactor 240 is de-energized, causing the vibration motor 123 to stop working.

[0138] according to Figure 5 and Figure 6It can be seen that by simply adjusting the contacts of the detection switch 223 and the preset time of the time relay 230, the automatic dust removal device for powder hoppers can be adapted to different types of powder hopper dust removal equipment.

[0139] This application also provides a powder hopper, which includes: a dust removal device installed in the powder hopper, and an automatic dust removal device for the powder hopper, as provided in any of the above embodiments, electrically connected to the dust removal device.

[0140] The powder jar provided in this application embodiment has a similar implementation principle and technical effect to the powder jar with automatic dust removal device installed in the above embodiment, and will not be described again here.

[0141] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A powder tank automatic dust removal device characterized by comprising: The device comprises a detection device and an electric control device; The detection device is installed on an ash inlet pipe of a powder tank, and is used to detect a conveying state of the powder tank; The electric control device is electrically connected with the detection device and a dust removal device of the powder tank respectively; The electric control device is used to control the dust removal device to remove dust from the powder tank according to a detection result of the detection device.

2. The apparatus of claim 1, wherein, The detection result comprises that the powder tank enters a conveying state and the powder tank enters a non-conveying state; The dust removal device is a pulse type dust removal device or a vibration type dust removal device; When the powder tank enters the conveying state, the electric control device is used to control the pulse type dust removal device to remove dust from the powder tank in a timing manner; When the powder tank enters the non-conveying state, the electric control device is used to control the vibration type dust removal device to remove dust from the powder tank in a timing manner.

3. The apparatus of claim 2, wherein, The detection device comprises a pipe clamp sleeved on the ash inlet pipe and a rotating part hinged on the pipe clamp; The rotating angle of the rotating part comprises a first angle and a second angle; When the rotating angle is the first angle, the rotating part is separated from a pipe opening of the ash inlet pipe, and the powder tank enters the conveying state; When the rotating angle is the second angle, the rotating part is attached to the pipe opening of the ash inlet pipe, and the powder tank enters the non-conveying state.

4. The apparatus of claim 3, wherein, The rotating part comprises a connecting plate hinged on the pipe clamp, and a cover plate and a detection switch fixedly installed on the connecting plate; The on-off state of the detection switch comprises a first state and a second state; When the rotating angle is the first angle, the cover plate is separated from the pipe opening, and the on-off state enters the first state; When the rotating angle is the second angle, the cover plate is attached to the pipe opening, and the on-off state enters the second state.

5. The apparatus of claim 4, wherein, The detection switch is a travel switch; When the rotating angle is the first angle, a push rod of the travel switch is separated from the pipe clamp, and the on-off state enters the first state; When the rotating angle is the second angle, the push rod of the travel switch is attached to the pipe clamp, and the on-off state enters the second state.

6. The apparatus of claim 4, wherein, The electric control device comprises a time relay and a contactor; The time relay is connected in series with the detection switch, and the contactor is connected in series with the dust removal device; When the time relay is powered on, the contactor is powered on; when the time relay is powered off, the contactor is powered off.

7. The apparatus of claim 6, wherein, The dust removal device is the pulse type dust removal device; The contactor is connected in series with a dust removal fan and a pulse control instrument of the pulse type dust removal device; When the on-off state enters the first state, the detection switch is turned on.

8. The apparatus of claim 6, wherein, The dust removal device is the vibration type dust removal device; The contactor is connected in series with a vibration motor of the vibration type dust removal device; When the on-off state enters the second state, the detection switch is turned on.

9. The device of any of claims 6-8, wherein, The electric control device further comprises a manual control switch; The manual control switch is connected in series with the contactor, and is connected in parallel with the time relay.

10. A powder canister characterized by, The powder tank comprises a dust removal device installed in the powder tank and the powder tank automatic dust removal device as claimed in any one of claims 1 to 9 electrically connected with the dust removal device.

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