A dust removal device
By using a dust removal device that combines negative and positive pressure, the problem of dust accumulation at the bends in the dust removal system of the shredder was solved, effectively removing dust and improving shredding quality and production safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA TOBACCO GUIZHOU IND
- Filing Date
- 2025-09-02
- Publication Date
- 2026-07-31
AI Technical Summary
Dust often accumulates at the bends in the pipes of existing shredding machine dust removal systems, causing blockages, which leads to reduced shredding quality, pollution of the production environment, harm to human health, and potential fire or explosion hazards.
The dust removal device adopts a combination of negative and positive pressure. The negative pressure mechanism directly adsorbs dust, while the positive pressure mechanism blows positive pressure gas at the bends of the negative pressure pipeline. In conjunction with the detection mechanism and pressure regulating components, the gas pressure and air volume are adjusted in real time to avoid dust accumulation and blockage.
It effectively removes dust generated by the shredder, improves shredding quality, improves the production environment, reduces harm to the human body, eliminates fire or explosion safety hazards, and achieves precise matching of gas blowing and adsorption forces.
Smart Images
Figure CN224573449U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of tobacco equipment, and in particular to a dust removal device. Background Technology
[0002] Cigarette shredders are common equipment in cigarette production, primarily used to cut tobacco leaves and stems into shreds or stems of a set width for subsequent cigarette processing. During high-speed cutting, the blades of the shredder are frequently sharpened with a grinding wheel to improve their sharpness and thus the quality of the shreds. However, the friction between the grinding wheel and the blades generates a large amount of dust, including metal powder, sand particles, tobacco shreds, and tobacco dust. If this dust is not removed promptly, it can lead to various problems, such as reduced shredding quality, environmental pollution, harm to human health, and potential fire or explosion hazards.
[0003] Most existing shredders are equipped with dust removal systems, including negative pressure fans and negative pressure pipes connected to the fans. The ports of the negative pressure pipes face the dust, and the dust is drawn into the dust collection box through negative pressure suction to improve the shredding stability and working efficiency of the shredder. However, existing dust removal systems for shredders often experience dust accumulation at pipe bends, causing pipe blockages. This results in the ineffective removal of dust generated by the shredder, leading to various problems such as reduced shredding quality, environmental pollution, harm to human health, and potential fire or explosion hazards. Utility Model Content
[0004] The purpose of this invention is to solve the problem that dust accumulation at the bends of existing dust removal systems for shredders frequently causes pipe blockage, resulting in ineffective dust removal, reduced shredding quality, environmental pollution, health hazards, and potential fire or explosion risks. This invention provides a dust removal device that prevents dust accumulation or blockage at the bends of negative pressure pipes, thereby effectively removing dust generated by the shredder, improving shredding quality, improving the production environment, reducing harm to human health, and eliminating fire or explosion hazards.
[0005] To solve the above-mentioned technical problems, the present invention discloses a dust removal device for removing dust from a shredder. The shredder is equipped with a dust collection tray for collecting dust. The dust removal device includes:
[0006] The negative pressure mechanism includes a negative pressure fan and a negative pressure pipeline. The negative pressure fan is equipped with an air intake, one end of the negative pressure pipeline is connected to the air intake, and the other end of the negative pressure pipeline faces the dust collection tray.
[0007] The positive pressure mechanism includes a positive pressure fan, a positive pressure pipeline, and multiple nozzles. Each nozzle is connected to a bend in the negative pressure pipeline, and the air outlet direction of each nozzle is the same as the flow direction of the dust at each bend. Each nozzle is connected to the positive pressure fan through the positive pressure pipeline to inject positive pressure gas into each bend in the negative pressure pipeline.
[0008] The first testing unit is used to test the weight of dust in the dust collection tray;
[0009] The pressure regulating assembly includes a pressure gauge and a pressure regulating valve. Both the pressure gauge and the pressure regulating valve are located on the positive pressure pipeline. The pressure gauge is used to display the pressure of the positive pressure gas in the positive pressure pipeline, and the pressure regulating valve is used to regulate the pressure of the positive pressure gas in the positive pressure pipeline.
[0010] The control unit is electrically connected to the first detection mechanism and the pressure regulating component. The control unit is used to control the pressure regulating valve to adjust the pressure of the positive pressure gas in the positive pressure pipeline according to the weight of the dust in the dust collection pan. The pressure of the positive pressure gas is proportional to the weight of the dust in the dust collection pan.
[0011] Using the above technical solution, the negative pressure mechanism is used to directly adsorb dust under negative pressure, and the positive pressure mechanism is used to blow air through each bend of the negative pressure pipeline. Through the cooperation of the negative pressure structure and the positive pressure mechanism, the problem of dust accumulation or adhesion at each bend can be avoided, thereby removing the dust generated by the shredder in a timely manner, improving the shredding quality, improving the production environment, reducing harm to the human body, and eliminating safety hazards such as fire or explosion.
[0012] In addition, by detecting the actual weight of the dust in the dust collection tray through the first testing agency, and adjusting the pressure of the positive pressure gas in the positive pressure pipeline in real time based on the actual weight of the dust in the dust collection tray, the precise adaptation of the positive pressure gas blowing force can be achieved. When the weight of the dust in the dust collection tray is large, it means that a large amount of dust is generated per unit time. At this time, increasing the positive pressure gas pressure can enhance the blowing intensity at the bend, effectively counteracting the tendency of a large amount of dust to accumulate. When the weight of the dust is small, the positive pressure is correspondingly reduced, which can avoid energy waste caused by excessive pressure and prevent high-pressure airflow from unnecessarily interfering with the negative pressure adsorption effect.
[0013] Optionally, the pressure of the positive pressure gas and the weight of the dust in the dust collection tray satisfy a first preset function, which is:
[0014]
[0015] Wherein, G0 is the preset weight of dust in the dust collection tray, in kg; P0 is the preset pressure of the positive pressure gas in the positive pressure pipe corresponding to the preset weight of dust in the dust collection tray, in MPa; G is the actual weight of dust in the dust collection tray, in kg; and P is the pressure of the positive pressure gas in the positive pressure pipe corresponding to the actual weight of dust in the dust collection tray, in MPa.
[0016] Optionally, the control unit is also electrically connected to the negative pressure fan, and the control unit is also used to adjust the air volume of the negative pressure fan according to the weight of the dust in the dust collection tray, wherein the air volume of the negative pressure fan is proportional to the weight of the dust.
[0017] By adopting the above technical solution, the air volume of the negative pressure fan can be adjusted in real time according to the actual weight of the dust in the dust collection tray, so as to achieve precise adaptation of the adsorption force of the negative pressure fan.
[0018] Optionally, the air volume of the negative pressure fan and the weight of the dust satisfy a second preset function, which is:
[0019]
[0020] Wherein, G0 is the preset weight of dust in the dust collection tray, in kg; D0 is the preset air volume of the negative pressure fan corresponding to the preset weight of dust in the dust collection tray, in m³ / s. 3 / h; G is the actual weight of the dust in the dust collection tray, in kg; D is the air volume of the negative pressure fan corresponding to the actual weight of the dust in the dust collection tray, in m³ / h. 3 / h.
[0021] Optionally, each bend in the negative pressure pipeline is provided with a connecting joint, the connecting joint having an internal cavity, the extension direction of each cavity being the same as the flow direction of dust at each bend, the first end of each connecting joint being connected to the negative pressure pipeline, and the second end of each connecting joint being provided with an internal thread; the two ends of the nozzle are the spraying end and the connecting end, respectively, the outer circumferential surface of the nozzle being provided with an external thread, the nozzle being inserted into the cavity and the external thread and the internal thread being threadedly connected, and the spraying end extending into the negative pressure pipeline.
[0022] Optionally, the connecting end is located outside the connecting joint. The connecting end is used to connect to the positive pressure pipeline. The outer circumferential surface of the connecting end is provided with an annular protrusion. The annular protrusion is interference-fitted with the end of the positive pressure pipeline. The annular protrusion is used to prevent the positive pressure pipeline from detaching from the connecting end.
[0023] Optionally, the injection end is funnel-shaped, and the inner diameter of the injection end gradually decreases along the flow direction of the positive pressure gas.
[0024] Optionally, the diameter of the nozzle at the injection end is 0.5 mm.
[0025] Optionally, the dust removal device also includes a dust collection box, which is located between the negative pressure fan and the negative pressure pipeline, and is used to collect dust.
[0026] Optionally, the negative pressure pipes and nozzles are made of stainless steel. Attached Figure Description
[0027] Figure 1 This diagram shows a schematic representation of the dust removal device in an embodiment of the present invention.
[0028] Figure 2 This diagram shows a schematic representation of the positive pressure mechanism in an embodiment of the present invention.
[0029] Figure 3 Show Figure 1 A magnified view of part A in the middle;
[0030] Figure 4 Show Figure 1 Sectional view of part A.
[0031] Reference numerals: 11. Negative pressure pipe, 111. Bend, 12. Connecting joint, 121. Cavity, 21. Positive pressure pipe, 22. Nozzle, 221. Spray end, 222. Connecting end, 223. Annular protrusion, 224. Spray port, 23. Positive pressure fan, 31. Pressure gauge, 32. Pressure regulating valve, 41. First detection mechanism, 100. Dust collection tray. Detailed Implementation
[0032] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.
[0033] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0034] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.
[0035] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0036] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.
[0037] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.
[0038] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model discloses a dust removal device for removing dust from a shredder. The shredder is equipped with a dust collection tray 100, in which dust is collected. The dust removal device includes a negative pressure mechanism, a positive pressure mechanism, a first detection mechanism 41, a pressure regulating component, and a control unit. The negative pressure mechanism includes a negative pressure fan (not shown) and a negative pressure pipe 11. The negative pressure fan has an air intake (not shown). One end of the negative pressure pipe 11 is connected to the air intake, and the other end of the negative pressure pipe 11 faces the dust collection tray 100. The negative pressure mechanism is used to adsorb dust from the dust collection tray 100. The positive pressure mechanism includes a positive pressure fan 23, a positive pressure pipe 21, and multiple nozzles 22. Each nozzle 22 is connected to a bend 111 of the negative pressure pipe 11, and the air outlet direction of each nozzle 22 (e.g., ...) is... Figure 4 (As shown by the middle arrow Y) corresponds to the direction of dust flow at each bend (e.g., Figure 1 and Figure 4As indicated by the middle arrow X, each nozzle 22 is connected to the positive pressure fan 23 via the positive pressure pipe 21 to inject positive pressure gas into each bend 111 of the negative pressure pipe 11, thereby blowing away dust at each bend 111 and preventing dust accumulation and blockage. The first detection mechanism 41 is used to detect the weight of dust in the dust collection pan 100. Specifically, the first detection mechanism 41 uses a high-precision weighing sensor to improve the accuracy of dust weight detection. The pressure regulating component includes a pressure gauge 31 and a pressure regulating valve 32, both of which are located on the positive pressure pipe 21. The pressure gauge 31 is used to display the real-time pressure of the positive pressure gas in the positive pressure pipe 21, and the pressure regulating valve 32 is used to adjust the pressure of the positive pressure gas in the positive pressure pipe 21. The control unit (not shown in the figure) is electrically connected to the first detection mechanism 41, the pressure gauge 31 and the pressure regulating valve 32. The control unit is used to receive the weight of the dust in the dust collection pan 100 detected by the first detection mechanism 41 and the real-time pressure value of the pressure gauge 31, and automatically adjust the pressure regulating valve 32 according to the weight of the dust in the dust collection pan 100 to adjust the pressure of the positive pressure gas in the positive pressure pipeline 21 to the ideal value.
[0039] Furthermore, the pressure of the positive pressure gas in the positive pressure pipe 21 is directly proportional to the weight of the dust in the dust collection pan 100. That is to say, when the weight of the dust in the dust collection pan 100 is large, it means that a large amount of dust is generated per unit time. At this time, increasing the positive pressure gas pressure can enhance the blowing intensity at the bend 111 and effectively counteract the potential trend of large-scale dust accumulation. When the weight of the dust is small, the positive pressure is correspondingly reduced, which can avoid energy waste caused by excessive pressure and prevent high-pressure airflow from causing unnecessary interference to the negative pressure adsorption effect.
[0040] Using the above technical solution, the negative pressure mechanism is used to directly adsorb dust under negative pressure, while the positive pressure mechanism is used to blow air through each bend 111 of the negative pressure pipe 11. Through the cooperation of the negative pressure structure and the positive pressure mechanism, the problem of dust accumulation or adhesion at each bend 111, which would otherwise cause blockage, can be avoided. This allows for timely removal of dust generated by the shredder, improving shredding quality, improving the production environment, reducing harm to human health, and eliminating safety hazards such as fire or explosion. Furthermore, the first detection mechanism 41 detects the actual weight of the dust in the dust collection tray 100, and adjusts the pressure of the positive pressure gas in the positive pressure pipe 21 in real time based on the actual weight of the dust in the dust collection tray 100, enabling precise matching of the positive pressure gas blowing force.
[0041] Optionally, the pressure of the positive pressure gas and the weight of the dust in the dust collection tray 100 satisfy a first preset function, which is:
[0042]
[0043] Wherein, G0 is the preset weight of dust in the dust collection tray 100, in kg; P0 is the preset pressure of the positive pressure gas in the positive pressure pipe 21 corresponding to the preset weight of dust in the dust collection tray 100, in MPa; G is the actual weight of dust in the dust collection tray 100, in kg; and P is the pressure of the positive pressure gas in the positive pressure pipe 21 corresponding to the actual weight of dust in the dust collection tray 100, in MPa.
[0044] Optionally, the control unit is also electrically connected to the negative pressure fan. The control unit is also used to adjust the airflow of the negative pressure fan according to the weight of the dust in the dust collection tray, and the airflow of the negative pressure fan is directly proportional to the weight of the dust. That is to say, when the weight of the dust in the dust collection tray 100 is large, it means that a large amount of dust is generated per unit time. At this time, increasing the airflow of the negative pressure fan can enhance the adsorption of dust and effectively counteract the tendency of a large amount of dust to accumulate. When the weight of the dust is small, the airflow of the negative pressure fan is reduced accordingly, so as to reduce production energy consumption while ensuring that the dust can be adsorbed.
[0045] By adopting the above technical solution, the air volume of the negative pressure fan can be adjusted in real time according to the actual weight of the dust in the dust collection tray 100, which can achieve precise matching of the adsorption force of the negative pressure fan.
[0046] Optionally, the air volume of the negative pressure fan and the weight of the dust satisfy a second preset function, which is:
[0047]
[0048] Wherein, G0 is the preset weight of dust in the dust collection tray 100, in kg; D0 is the preset air volume of the negative pressure fan corresponding to the preset weight of dust in the dust collection tray 100, in m³ / s. 3 / h; G is the actual weight of the dust in the dust collection tray 100, in kg; D is the air volume of the negative pressure fan corresponding to the actual weight of the dust in the dust collection tray 100, in m³ / h. 3 / h.
[0049] Optionally, such as Figure 3 and Figure 4 As shown, each bend 111 of the negative pressure pipeline 11 is provided with a connecting joint 12, and the interior of the connecting joint 12 has a cavity 121. The extension direction of each cavity 121 is (e.g., Figure 4 (As shown by the middle arrow Z) and the direction of dust flow at each bend (as shown by...) Figure 4(As shown by the middle arrow X). The first end of each connecting joint 12 is connected to the negative pressure pipe 11, and the second end of each connecting joint 12 is provided with an internal thread (not shown in the figure). The two ends of the nozzle 22 are the injection end 221 and the connection end 222, respectively. The outer circumferential surface of the nozzle 22 is provided with an external thread (not shown in the figure). The nozzle 22 is inserted into the cavity 121 and the external thread and the internal thread are threadedly connected. The injection end 221 extends into the negative pressure pipe 11 to inject positive pressure gas into the negative pressure pipe 11.
[0050] Optionally, such as Figure 3 and Figure 4 As shown, the connecting end 222 is located outside the connecting joint 12. The connecting end 222 is used to connect to the positive pressure pipe 21. An annular protrusion 223 is provided on the outer circumferential surface of the connecting end 222. The annular protrusion 223 is interference-fitted with the end of the positive pressure pipe 21 to prevent the positive pressure pipe 21 from disengaging from the connecting end 222. For example, the outer diameter of the annular protrusion 223 of the connecting end 222 is 16 mm, forming an interference fit with the positive pressure pipe 21 with an inner diameter of 16 mm, so that the positive pressure pipe 21 is tightly connected to the nozzle 22.
[0051] Optionally, such as Figure 3 and Figure 4 As shown, the injection end 221 is funnel-shaped, along the direction of the positive pressure gas flow (i.e., the nozzle outlet direction, such as...). Figure 4 As indicated by the middle arrow Y), the inner diameter of the injection end 221 gradually decreases. For example, the inlet diameter of the injection end 221 (e.g., ...) Figure 4 The dimension D1 shown in the figure is 10mm, and the diameter of the nozzle 224 (as shown in the figure) is 10mm. Figure 4 The dimension D2 shown in the figure is 0.5 mm. This structure, which gradually contracts along the direction of positive pressure gas flow, can increase the speed of the ejected airflow and enhance the pushing force on the dust.
[0052] Optionally, the dust removal device also includes a dust collection box (not shown in the figure), which is located between the negative pressure fan and the negative pressure pipe 11. The dust collection box is used to collect dust. Furthermore, the dust collection box can adopt a drawer-type filter structure, located between the negative pressure fan and the negative pressure pipe, to regularly clean the collected mixture of metal powder and soot, etc., to avoid secondary pollution.
[0053] Optionally, both the negative pressure pipe 11 and the nozzle 22 are made of 304 stainless steel to withstand dust abrasion and airflow impact, thus extending the service life of the equipment.
[0054] The dust removal device of this utility model will be described in detail below through Embodiments 1 and 2:
[0055] This dust removal device is used in the shredding machine production line of a cigarette factory. The preset weight G0 of the dust collection tray 100 is set to 0.25 kg, the corresponding preset pressure P0 of the positive pressure pipe 21 is 0.14 MPa, and the preset airflow D0 of the negative pressure fan is 1000 m³ / h. 3 / h. The first testing agency 41 monitors the actual weight G of the dust in the dust collection tray 100 in real time.
[0056] Example 1
[0057] When the shredder is operating at full load, the frequency of the grinding wheel sharpening the blades increases, and the actual weight G of the dust in the dust collection pan 100 reaches 0.5 kg. According to the first preset function, the pressure P of the positive pressure gas at this time is calculated as follows:
[0058]
[0059] The pressure regulating valve 32 automatically adjusts the pressure of the positive pressure pipeline 21 to 0.28 MPa. At this time, the airflow intensity of the nozzle 22 blowing towards the bend 111 of the negative pressure pipeline 11 increases. Simultaneously, the airflow of the negative pressure fan is adjusted synchronously according to the second preset function.
[0060]
[0061] In other words, the air volume of the negative pressure fan increases simultaneously. Through the synergistic effect of negative and positive pressure, a large amount of dust is ensured to pass smoothly through the pipe bend 111 without accumulation or blockage.
[0062] Example 2
[0063] When the shredder is running at low load, the frequency of the grinding wheel sharpening the blades decreases, and the actual weight G of the dust in the dust collection pan 100 drops to 0.2 kg. According to the first preset function, the pressure P of the positive pressure gas at this time is calculated as follows:
[0064]
[0065] The pressure regulating valve 32 automatically adjusts the pressure of the positive pressure pipeline 21 to 0.11 MPa, and the airflow intensity sprayed by the nozzle 22 onto the bend 111 of the negative pressure pipeline 11 decreases. Simultaneously, the airflow of the negative pressure fan is adjusted synchronously according to the second preset function.
[0066]
[0067] In other words, the air volume of the negative pressure fan is reduced to 946m³. 3 / h, achieving energy consumption optimization while ensuring dust removal effectiveness.
[0068] In summary, the dust removal device provided by this utility model can prevent dust accumulation or blockage at each bend 111 of the negative pressure pipe 11, thereby effectively removing the dust generated by the shredder, improving shredding quality, improving the production environment, reducing harm to the human body, and eliminating safety hazards such as fire or explosion. Furthermore, by detecting the actual weight of the dust in the dust collection tray 100 through the first detection mechanism 41, and adjusting the pressure of the positive pressure gas in the positive pressure pipe 21 and the airflow of the negative pressure fan in real time based on the actual weight of the dust in the dust collection tray 100, precise matching of the positive pressure gas blowing force and the negative pressure fan adsorption force can be achieved.
[0069] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.
Claims
1. A dust removal device for removing dust from a shredder, characterized in that, The shredder is equipped with a dust collection tray for collecting dust. The dust removal device includes: The negative pressure mechanism includes a negative pressure fan and a negative pressure pipe. The negative pressure fan is provided with an air intake. One end of the negative pressure pipe is connected to the air intake, and the other end of the negative pressure pipe faces the dust collection tray. A positive pressure mechanism includes a positive pressure fan, a positive pressure pipeline, and multiple nozzles. Each nozzle is connected to a bend in the negative pressure pipeline, and the air outlet direction of each nozzle is the same as the flow direction of the dust at each bend. Each nozzle is connected to the positive pressure fan through the positive pressure pipeline to inject positive pressure gas into each bend in the negative pressure pipeline. The first testing mechanism is used to test the weight of the dust in the dust collection tray; A pressure regulating assembly includes a pressure gauge and a pressure regulating valve. Both the pressure gauge and the pressure regulating valve are located on the positive pressure pipeline. The pressure gauge is used to display the pressure of the positive pressure gas in the positive pressure pipeline, and the pressure regulating valve is used to adjust the pressure of the positive pressure gas in the positive pressure pipeline. The control unit is electrically connected to the first detection mechanism and the pressure regulating component, respectively. The control unit is used to control the pressure regulating valve to adjust the pressure of the positive pressure gas in the positive pressure pipeline according to the weight of the dust in the dust collection pan. The pressure of the positive pressure gas is proportional to the weight of the dust in the dust collection pan.
2. The dust removal device as described in claim 1, characterized in that, The pressure of the positive pressure gas and the weight of the dust in the dust collection tray satisfy a first preset function, which is: Wherein, G0 is the preset weight of dust in the dust collection tray, in kg; P0 is the preset pressure of the positive pressure gas in the positive pressure pipe corresponding to the preset weight of dust in the dust collection tray, in MPa; G is the actual weight of dust in the dust collection tray, in kg; and P is the pressure of the positive pressure gas in the positive pressure pipe corresponding to the actual weight of dust in the dust collection tray, in MPa.
3. The dust removal device as described in claim 2, characterized in that, The control unit is also electrically connected to the negative pressure fan, and the control unit is also used to adjust the air volume of the negative pressure fan according to the weight of the dust in the dust collection tray, wherein the air volume of the negative pressure fan is proportional to the weight of the dust.
4. The dust removal device as described in claim 3, characterized in that, The air volume of the negative pressure fan and the weight of the dust satisfy a second preset function, which is: Wherein, G0 is the preset weight of dust in the dust collection tray, in kg; D0 is the preset air volume of the negative pressure fan corresponding to the preset weight of dust in the dust collection tray, in m³ / s. 3 / h; G is the actual weight of the dust in the dust collection tray, in kg; D is the air volume of the negative pressure fan corresponding to the actual weight of the dust in the dust collection tray, in m³ / h. 3 / h.
5. The dust removal device according to any one of claims 1 to 4, characterized in that, Each bend in the negative pressure pipeline is provided with a connecting joint, and the connecting joint has a cavity inside. The extension direction of each cavity is the same as the flow direction of dust at each bend. The first end of each connecting joint is connected to the negative pressure pipeline, and the second end of each connecting joint is provided with an internal thread. The two ends of the nozzle are a spray end and a connecting end, respectively. The outer circumferential surface of the nozzle is provided with an external thread. The nozzle is inserted into the cavity and the external thread and the internal thread are threadedly connected. The spray end extends into the negative pressure pipeline.
6. The dust removal device as described in claim 5, characterized in that, The connecting end is located outside the connecting joint. The connecting end is used to connect to the positive pressure pipeline. An annular protrusion is provided on the outer circumferential surface of the connecting end. The annular protrusion is interference-fitted with the end of the positive pressure pipeline. The annular protrusion is used to prevent the positive pressure pipeline from detaching from the connecting end.
7. The dust removal device as described in claim 6, characterized in that, The injection end is funnel-shaped, and its inner diameter gradually decreases along the flow direction of the positive pressure gas.
8. The dust removal device as described in claim 7, characterized in that, The diameter of the nozzle at the injection end is 0.5 mm.
9. The dust removal device as described in claim 1, characterized in that, The dust removal device also includes a dust collection box, which is located between the negative pressure fan and the negative pressure pipeline, and is used to collect the dust.
10. The dust removal device as described in claim 1, characterized in that, Both the negative pressure pipe and the nozzle are made of stainless steel.