A blowoff powder device and system for bin unloading

Abstract

The application provides a blowout prevention device and system for material unloading of a silo. The device comprises a material level height detection device for obtaining the powder height in the silo and generating a cut-off signal when the powder height exceeds a preset height; a control device, a gas source control output end of which is used for outputting a gas pressure signal; an electrical signal receiving end of which is electrically connected with the material level height detection device and stops the output of the gas pressure signal when the cut-off signal is received; and a gas cut-off device, a gas source control input end of which is connected with the gas source control output end of the control device; an outlet end of which is connected with a pressure supply end of the tank car, and an inlet end of which is connected with an external compressed air supply device through a gas supply pipeline. The system can cut off the gas source entering the tank car instead of directly closing the powder channel, effectively preventing dust leakage and equipment damage, ensuring operation safety, reducing raw material waste and environmental pollution.

Description

Technical Field

[0001] This application relates to the technical field of silo feeding, and more particularly to a dust-preventing device and system for silo feeding. Background Technology

[0002] The current powder tanker feeding system uses compressed air from the factory to feed powder from the tanker to the silo. When the material level reaches a high level, it only provides an alarm and has no other technical measures.

[0003] In other words, its control method, which relies solely on high-level alarm prompts, poses a safety hazard. The tanker's material feeding is manually controlled; when a high material level is detected, the PLC system only outputs a signal to the control cabinet panel indicator light for an alarm. This passive control method is easily overlooked by operators. If feeding continues, the silo will overflow, damaging the silo top structure and wasting production materials. Furthermore, when a high level is detected, the operator first closes the valve between the powder tanker and the silo, causing the air pressure inside the powder tanker to rise. This can cause the flexible joint between the powder tanker and the material pipe to loosen and detach, potentially injuring nearby workers.

[0004] Based on this, this application provides a dust-prevention device and system for feeding materials from a silo. Utility Model Content

[0005] The purpose of this application is to provide a dust-prevention device and system for feeding materials from a silo, thereby solving the aforementioned technical problems.

[0006] The objective of this application is achieved through the following technical solution: This application provides a dust-prevention device for silo feeding, comprising: A material level detection device is installed at the top of the silo to obtain the height of the powder in the silo and generate a cut-off signal when the powder height exceeds a preset height. The control device has an air source control output terminal for outputting an air pressure signal; its electrical signal receiving terminal is electrically connected to the material level detection device, and stops the output of the air pressure signal when it receives the cut-off signal. A gas cut-off device has its gas source control input end connected to the gas source control output end of the control device; its outlet end connected to the pressure supply end of the tank truck; and its inlet end connected to an external compressed air supply device through a gas supply pipeline. The tank truck is used to store powder, and the discharge end of the tank truck is connected to the inlet of the silo through a powder conveying pipeline.

[0007] In some alternative embodiments, the material level detection device includes a tuning fork sensor; the gas cut-off device includes a pneumatic ball valve.

[0008] In some optional embodiments, the control device includes a two-position five-way solenoid valve and an intermediate relay. The two-position five-way solenoid valve is disposed in the middle of the gas path for driving the gas cut-off device to open. The intermediate relay is used to receive the cut-off signal and then activate and switch the two-position five-way solenoid valve from a first state to a second state. In the first state, the air inlet of the two-position five-way solenoid valve is connected to the gas source control output terminal to provide the gas pressure signal to keep the pneumatic ball valve open. In the second state, the air inlet of the two-position five-way solenoid valve is closed to the gas source control output terminal, thereby closing the pneumatic ball valve.

[0009] In some optional embodiments, the gas supply pipeline is of any one of DN40, DN50, and DN65.

[0010] In some optional embodiments, the inlet end of the pneumatic ball valve is connected to an external compressed air supply device via an air supply pipeline to receive compressed air of 0.2 MPa to 0.5 MPa provided by the compressed air supply device.

[0011] In some alternative embodiments, a powder cutting-off device is provided in the middle of the powder conveying pipeline connecting the tank truck and the silo. The powder cutting-off device is used to cut off the connection between the tank truck and the silo after the two-position five-way solenoid valve is in the second state.

[0012] In some optional embodiments, the powder is kaolin powder or titanium dioxide powder.

[0013] In some optional embodiments, an alarm device is also included, which is electrically connected to an intermediate relay of the control device and is used to receive an alarm signal sent by the intermediate relay.

[0014] In some alternative embodiments, the alarm device includes a buzzer alarm and / or an alarm light.

[0015] This application also provides a dust-prevention system, including the dust-prevention device described in any of the above claims, and further including a tank truck for storing powder, wherein the discharge end of the tank truck is connected to the inlet of the silo via a powder conveying pipeline.

[0016] Based on the above technical solutions and the technical problems solved, the technical solution to be protected in this application includes a powder spray prevention system comprising a tank truck, a material level detection device, a control device, and a gas cut-off device. When the tank truck discharges material into the silo, the material level detection device monitors the powder level in the silo in real time. Once the powder level exceeds a preset value, the detection device immediately generates a cut-off signal and transmits it to the control device. Upon receiving the signal, the control device stops outputting the air pressure signal, thereby closing the gas cut-off device, cutting off the compressed air supply, and stopping the tank truck from discharging material. The powder may be, for example, kaolin powder or titanium dioxide powder. The material level detection device and the control device communicate via electrical signals, while the control device and the gas cut-off device communicate via air pressure signals. This utilizes the advantages of fast and accurate electrical signal transmission, as well as the ability of air pressure signals to directly drive the gas cut-off device, ensuring accurate and timely material level control.

[0017] Its advantages and positive effects are as follows: It prevents powder spraying by cutting off the power source (compressed air) instead of directly shutting down the powder conveying pipeline. Compared to directly shutting down the conveying pipeline, this avoids the risk of flexible joints detaching or pipe bursting due to a sudden increase in pipeline pressure, protecting the safety of operators. Simultaneously, after a high-level signal trigger, the pneumatic ball valve can quickly respond and cut off the air source, preventing dust leakage caused by silo overflow, reducing raw material waste and environmental pollution. Furthermore, the electro-pneumatic linkage control reduces manual intervention and lowers the rate of operational errors. Attached Figure Description

[0018] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of an anti-powder spraying system for silo feeding provided in an embodiment of this application.

[0020] Illustration: 1. Material level detection device; 2. Powder conveying pipeline; 3. Air supply pipeline; 4. Tank truck; 5. Silo; 6. Gas cut-off device; 7. Compressed air supply equipment; 8. Control device. Detailed Implementation

[0021] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0022] See Figure 1 This application provides a dust-prevention system for silo feeding, comprising: Tank car 4, which is used to store powder, and the discharge end of the tank car 4 is connected to the inlet of the silo 5 through an air supply pipe 3; the specifications of the air supply pipe 3 are, for example, any one of DN40, DN50, and DN65. Material level detection device 1 is installed at the top of the hopper 5 to obtain the powder level in the hopper 5 and generate a cut-off signal when the powder level exceeds a preset height; The control device 8 has an air source control output terminal for outputting an air pressure signal; its electrical signal receiving terminal is electrically connected to the material level detection device 1, and stops outputting the air pressure signal when it receives the cut-off signal. The gas cut-off device 6 has its gas source control input end connected to the gas source control output end of the control device 8; its outlet end connected to the pressure supply end of the tank truck 4; and its inlet end connected to the external compressed air supply equipment 7 (i.e., gas source) through a gas supply pipeline.

[0023] The technical solution provided in this embodiment involves a material level detection device 1 monitoring the powder level in the silo 5 in real time when the tank truck 4 is discharging material into the silo 5. Once the powder level exceeds a preset value, the detection device immediately generates a cut-off signal and transmits it to the control device 8. Upon receiving the signal, the control device 8 stops outputting the pneumatic signal, thereby closing the gas cut-off device 6, cutting off the compressed air supply, and stopping the tank truck 4 from discharging material. The powder can be, for example, kaolin powder or titanium dioxide powder. The material level detection device 1 and the control device 8 communicate via electrical signals, while the control device 8 and the gas cut-off device 6 are controlled via pneumatic signals. This utilizes the advantages of fast and accurate electrical signal transmission, as well as the ability of pneumatic signals to directly drive the gas cut-off device 6, ensuring precise and timely material level control.

[0024] Its beneficial effects include preventing powder spraying by cutting off the power source (compressed air) instead of directly shutting down the powder conveying pipeline. Compared to directly shutting down the powder conveying pipeline, this avoids the risk of flexible joints detaching or pipe bursting due to a sudden increase in pipeline pressure, protecting the safety of operators. Simultaneously, after a high-level signal trigger, the pneumatic ball valve can quickly respond and cut off the air source, preventing dust leakage caused by overflowing hopper 5, reducing raw material waste and environmental pollution. Furthermore, the electro-pneumatic linkage control reduces manual intervention and lowers the rate of operational errors.

[0025] In some embodiments, the material level detection device 1 includes a tuning fork sensor; the gas cut-off device 6 includes a pneumatic ball valve.

[0026] The tuning fork sensor is chosen because it is suitable for detecting powder materials such as kaolin or titanium dioxide in complex industrial environments. It accurately determines whether the powder level has reached a high level, thus enabling automatic control and preventing safety issues caused by overpressure in the silo. It efficiently detects the level of powder or granules, exhibits high stability and strong anti-interference capabilities, and is easy to install and maintain.

[0027] In some embodiments, the control device 8 includes a two-position five-way solenoid valve and an intermediate relay, the two-position five-way solenoid valve being disposed in the gas path for driving the gas cut-off device 6 to open. Figure 1 (A schematic diagram of a partial gas path is shown in the diagram of the connection between the control device 8 and the gas cut-off device 6.) The intermediate relay (with its electrical signal receiving end) receives the cut-off signal and activates, causing the two-position five-way solenoid valve to switch from a first state to a second state. In the first state, the air inlet of the two-position five-way solenoid valve is connected to the gas source control output (i.e., between the first exhaust port), providing the gas pressure signal to keep the pneumatic ball valve open. In the second state, the air inlet of the two-position five-way solenoid valve is closed (in this case, the air inlet can be connected to the second exhaust port), causing the pneumatic ball valve to close. The intermediate relay is, for example, a 24VDC intermediate relay.

[0028] As an example, the control device 8 achieves rapid switching of the air circuit through electro-pneumatic linkage. When the material level detection device 1 (such as a tuning fork sensor) detects that the powder exceeds the limit and generates a cut-off signal, the intermediate relay receives the electrical signal and activates, driving the two-position five-way solenoid valve to switch from the first state to the second state. In the first state (normal feeding), the air inlet of the solenoid valve is connected to the air source control output terminal, continuously outputting a 0.6 MPa air pressure signal to the gas cut-off device 6 (such as a pneumatic ball valve), keeping it open, and compressed air can be supplied to the tank truck 4 for feeding; while in the second state, the air inlet of the solenoid valve is closed to the air source control output terminal, the air pressure signal is interrupted, the pneumatic ball valve closes instantly, completely cutting off the compressed air supply to the tank truck 4 (working pressure, for example, 0.2 MPa-0.5 MPa), forcibly terminating the feeding process.

[0029] Its beneficial effects include improved system safety and response efficiency through an electro-pneumatic conversion mechanism. Compared to directly shutting down the powder conveying pipeline, directly cutting off the power source rather than simply cutting off the powder flow path avoids the risk of flexible joints detaching or pipe bursting due to a sudden increase in pipeline pressure, ensuring the safety of operators. Furthermore, the switching speed of the solenoid valve ensures that the air source is immediately cut off after the signal is triggered, preventing powder overflow and eliminating environmental pollution and material waste.

[0030] In some embodiments, a powder cutting device is provided in the middle of the powder conveying pipe 2 connecting the tank truck 4 and the silo 5. Figure 1 (Not shown in the image), the powder cutting device is used to cut off the connection between the tanker 4 and the silo 5 after the two-position five-way solenoid valve is in the second state.

[0031] Specifically, when the material level reaches a preset height, the material level sensor sends a signal to the control device 8, which controls the powder cutting device (e.g., a control valve) to cut off the connection between the tank truck 4 and the silo 5 after a certain period of time in the second state, or at that time. The period of time is, for example, 1 minute, 2 minutes, or 5 minutes.

[0032] In some embodiments, an alarm device is further included, which is electrically connected to an intermediate relay of the control device 8, for receiving an alarm signal sent by the intermediate relay after receiving the cut-off signal and for triggering an alarm. The alarm device may include, for example, a buzzer alarm and / or an alarm light.

[0033] To facilitate understanding, the technical solution protected in this application will be illustrated through an example.

[0034] The system is configured as follows: Tank truck 4 is used to temporarily store kaolin powder. One end of the powder conveying pipeline 2 is connected to the discharge port of tank truck 4, and the other end is connected to the top inlet of silo 5. The material level detection device 1 is a tuning fork sensor installed on the top of silo 5, with the powder accumulation height set at 5.5m (total silo height 6m).

[0035] The air supply circuit consists of compressed air supply equipment 7 (air source) – pneumatic ball valve – tank truck pressurization port, providing the tank truck with a delivery air pressure of 0.4MPa. The opening and closing of the pneumatic ball valve is controlled by a two-position five-way solenoid valve. In the first state, the solenoid valve connects to the air supply to the pneumatic ball valve, opening the valve; in the second state, it disconnects the air supply, closing the valve.

[0036] In the powder cutting section, a powder cutting device is added to the middle section of the powder conveying pipeline 2. The powder cutting device includes a solenoid valve and a pneumatic valve, as well as a time-delay relay positioned between the solenoid valve and the tuning fork sensor. The linkage between the solenoid valve, pneumatic valve, tuning fork sensor, and air source is similar to that of the pneumatic ball valve and two-position five-way solenoid valve mentioned above, and will not be elaborated further. The difference is the addition of a time-delay relay, used to cut off the connection between the tank truck 4 and the silo 5 after a set time following the disconnection of the compressed air supply equipment 7 from the tank truck. The set time is achieved using the time-delay relay.

[0037] Its working process is as follows: During normal material feeding, the solenoid valve is in the first state, and the compressed air supply equipment 7 continuously supplies air to the tank truck. Under the action of air pressure, the powder in the tank truck is transported to the silo 5 through the powder conveying pipeline 2. At this time, the powder cutting device is in the open circuit.

[0038] When the material level reaches 5.5m, the tuning fork sensor activates, the solenoid valve de-energizes and switches to its second state, the pneumatic ball valve shuts off and closes quickly, cutting off the air supply to the tank truck; simultaneously, the time-delay relay is energized and begins a 1-minute countdown. During the delay, the remaining powder in the powder conveying pipeline 2 continues to enter the silo 5 using residual air pressure. At the end of the delay, the normally open contact of the time-delay relay closes, and the pneumatic ball valve closes, completely cutting off the powder channel between the tank truck and the silo, preventing overfeeding and powder spraying.

[0039] The entire system effectively prevents dust leakage and equipment damage by cutting off the air supply to tanker 4 instead of directly shutting off the powder channel, ensuring operational safety and reducing raw material waste and environmental pollution.

[0040] This application also provides a dust-prevention device for silo feeding, the specific embodiment of which is consistent with the embodiments described in the above system embodiments and achieves the same technical effects, and some contents will not be repeated. It includes: A material level detection device is installed at the top of the silo to obtain the height of the powder in the silo and generate a cut-off signal when the powder height exceeds a preset height. The control device has an air source control output terminal for outputting an air pressure signal; its electrical signal receiving terminal is electrically connected to the material level detection device, and stops the output of the air pressure signal when it receives the cut-off signal. A gas cut-off device has its gas source control input end connected to the gas source control output end of the control device; its outlet end connected to the pressure supply end of the tank truck; and its inlet end connected to an external compressed air supply device through a gas supply pipeline. The tank truck is used to store powder, and the discharge end of the tank truck is connected to the inlet of the silo through a powder conveying pipeline.

[0041] In some embodiments, the material level detection device includes a tuning fork sensor; the gas cut-off device includes a pneumatic ball valve.

[0042] In some embodiments, the control device includes a two-position five-way solenoid valve and an intermediate relay. The two-position five-way solenoid valve is disposed in the middle of the gas path for driving the gas cut-off device to open. The intermediate relay is used to receive the cut-off signal and then activate and switch the two-position five-way solenoid valve from a first state to a second state. In the first state, the air inlet of the two-position five-way solenoid valve is connected to the gas source control output terminal to provide the gas pressure signal to keep the pneumatic ball valve open. In the second state, the air inlet of the two-position five-way solenoid valve is closed to the gas source control output terminal, thereby closing the pneumatic ball valve.

[0043] In some embodiments, the gas supply pipeline has a specification of any one of DN40, DN50, and DN65.

[0044] In some embodiments, the inlet end of the pneumatic ball valve is connected to an external compressed air supply device via an air supply pipeline to receive compressed air at 0.2 MPa to 0.5 MPa provided by the compressed air supply device. Simultaneously, compressed air at 0.6 MPa is provided to the air source control output end through the compressed air supply device and the connecting pipe to drive the gas cut-off device to open.

[0045] In some embodiments, a powder cutting device is provided in the middle of the powder conveying pipeline connecting the tank truck and the silo. The powder cutting device is used to cut off the connection between the tank truck and the silo after the two-position five-way solenoid valve is in the second state.

[0046] In some embodiments, the powder is kaolin powder or titanium dioxide powder.

[0047] In some embodiments, an alarm device is further included, which is electrically connected to an intermediate relay of the control device and is used to receive an alarm signal sent by the intermediate relay. This can be understood as receiving the alarm signal sent by the intermediate relay after receiving the cut-off signal and triggering an alarm. The alarm device includes a buzzer alarm and / or an alarm light.

[0048] It should be noted that in the embodiments of this application, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, and c can be single or multiple. It is worth noting that "at least one" can also be interpreted as "one or more".

[0049] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are configured to distinguish similar objects and are not necessarily configured to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0050] This application describes the invention from the perspectives of purpose, performance, progress, and novelty, and it meets the functional enhancement and use requirements emphasized by the Patent Law. The above description and drawings are merely preferred embodiments of this application and are not intended to limit this application. Therefore, all structures, devices, features, etc., that are similar to or identical to those of this application, i.e., all equivalent substitutions or modifications made in accordance with the scope of this patent application, shall fall within the scope of protection of this patent application.

Claims

1. A dust-prevention device for feeding materials from a silo, characterized in that, include: A material level detection device is installed at the top of the silo to obtain the height of the powder in the silo and generate a cut-off signal when the powder height exceeds a preset height. The control device has an air source control output terminal used to output an air pressure signal; Its electrical signal receiving end is electrically connected to the material level detection device, and stops the output of the air pressure signal when the cut-off signal is received; A gas cut-off device, wherein the gas source control input terminal is connected to the gas source control output terminal of the control device; Its outlet end is connected to the pressure supply end of the tank truck, and its inlet end is connected to an external compressed air supply device through an air supply pipeline; wherein, the tank truck is used to store powder, and the discharge end of the tank truck is connected to the inlet of the silo through a powder conveying pipeline.

2. The dust spray prevention device according to claim 1, characterized in that, The material level detection device includes a tuning fork sensor; the gas cut-off device includes a pneumatic ball valve.

3. The dust spray prevention device according to claim 2, characterized in that, The control device includes a two-position five-way solenoid valve and an intermediate relay. The two-position five-way solenoid valve is located in the middle of the gas path used to drive the gas cut-off device to open. The intermediate relay is used to receive the cut-off signal and activate it to switch the two-position five-way solenoid valve from a first state to a second state. In the first state, the air inlet of the two-position five-way solenoid valve is connected to the gas source control output terminal to provide the gas pressure signal to keep the pneumatic ball valve open. In the second state, the air inlet of the two-position five-way solenoid valve is closed to the gas source control output terminal, so that the pneumatic ball valve is closed.

4. The anti-powder spray device according to claim 3, characterized in that, The gas supply pipeline has any one of the following specifications: DN40, DN50, and DN65.

5. The anti-powder spraying device according to claim 4, characterized in that, The inlet of the pneumatic ball valve is connected to an external compressed air supply device via an air supply pipeline, and is used to receive compressed air of 0.2Mpa-0.5Mpa provided by the compressed air supply device.

6. The dust spray prevention device according to claim 3, characterized in that, A powder cutting-off device is provided in the middle of the powder conveying pipeline connecting the tank truck and the silo. The powder cutting-off device is used to cut off the connection between the tank truck and the silo after the two-position five-way solenoid valve is in the second state.

7. The dust spray prevention device according to claim 1, characterized in that, The powder is kaolin powder or titanium dioxide powder.

8. The dust spray prevention device according to claim 1, characterized in that, It also includes an alarm device, which is electrically connected to the intermediate relay of the control device and is used to receive alarm signals sent by the intermediate relay.

9. The dust spray prevention device according to claim 8, characterized in that, The alarm device includes a buzzer alarm and / or an alarm light.

10. A dust spray prevention system, characterized in that, The device includes the anti-powder spraying device according to any one of claims 1-9, and further includes a tank truck for storing powder, wherein the discharge end of the tank truck is connected to the inlet of the silo through a powder conveying pipeline.

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