Conveying device for preventing dust from escaping

Abstract

The utility model discloses a conveying device that prevents dust from escaping relates to material transportation technical field, including, seal cover, conveying belt device, conveying belt device has the middle line of front -back direction extension, and conveying belt device front side is as output side, baffle, is respectively established in the left and right sides of conveying belt device upside, baffle is installed obliquely, and baffle lower extreme with conveying belt device upside contact, and the powder material is located between the baffle of left and right sides, and the baffle of conveying belt device both sides adopts the design of inclination, can gather dust and move along the middle line direction, prevent dust from escaping.

Description

Technical Field

[0001] This utility model relates to the field of material transportation technology, and in particular to a conveying device for preventing dust from escaping. Background Technology

[0002] Belt conveyors are used for material transport and are widely used in various transportation operations in industrial production. However, for powdery materials, such as those used in the process of evaporating saline wastewater in a drum dryer, the use of belt conveyors to transport dry salt can cause a large amount of salt powder to escape, which can not only cause environmental pollution but also affect the health of workers and even pose an explosion risk.

[0003] To address the aforementioned issues in conveying powdery materials, existing technologies typically employ enclosed conveyor lines combined with vacuum adsorption to prevent dust escape. However, this vacuum adsorption method suffers from uneven adsorption, particularly as dust tends to leak out along the sides of the conveyor line where the adsorption force is lower, causing dust to escape. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a conveying device to prevent dust from escaping.

[0005] The conveying device for preventing dust escape according to an embodiment of the present invention includes:

[0006] A sealing cover with a cavity; a conveyor belt device located inside the sealing cover, the conveyor belt device having a centerline extending in the front-to-back direction, the conveyor belt device being able to convey powder from back to front along the centerline direction, the front side of the conveyor belt device serving as the output side; baffles respectively disposed on the left and right sides of the upper side of the conveyor belt device, the baffles being installed at an angle, the baffles being inclined along the direction away from the centerline from the upper side towards the lower side of the centerline, the lower end of the baffles contacting the upper side of the conveyor belt device, the powder being located between the left and right baffles.

[0007] According to some embodiments of this utility model, dust suppression skirts are provided on the left and right sides of the conveyor belt device. The dust suppression skirts are located between the baffle and the inner wall of the sealing cover. The cross-section of the dust suppression skirt is wave-shaped. The dust suppression skirt has a number of wave units arranged and connected periodically. The wave unit is composed of alternating peaks and troughs. The peaks are located away from the center line, and the troughs are located near the center line. Dust suppression spaces are formed between adjacent peaks and adjacent troughs.

[0008] According to some embodiments of this utility model, it also includes a powder feeder, which includes a drum dryer, a negative pressure duct, and a discharge cylinder. The drum dryer is equipped with a drum, the negative pressure duct is located on the upper side of the drum dryer, and a centrifugal fan is built into the negative pressure duct. The centrifugal fan can create a negative pressure inside the drum dryer. The discharge cylinder is connected between the output side of the drum dryer and the upper side of the sealing cover. A dust concentration sensor is built into the negative pressure duct.

[0009] According to some embodiments of this utility model, the conveyor belt device includes a support, a rear drive roller, a front transmission roller, and a conveyor belt. The conveyor belt is sleeved on the drive roller and the transmission roller. The drive roller is connected to a drive motor. The upper end of the baffle is connected to the inner wall of the sealing cover or the support. The conveyor belt has an upper belt and a lower belt. The powder is placed on the upper side of the upper belt. A weighing roller is provided on the lower side of the upper belt. The upper side of the weighing roller abuts against the lower side of the upper belt. The weighing roller has a pressure sensor. The drive roller, the transmission roller, the weighing roller, and the support are connected.

[0010] According to some embodiments of the present invention, the upper belt and the lower belt are provided with supporting rollers on their lower sides, and the upper side of the supporting rollers abuts against the lower side of the upper belt or the lower belt.

[0011] According to some embodiments of the present invention, a vertical unloading channel is provided on the front side of the conveyor belt device, the upper end of the vertical unloading channel is connected to the front end of the sealing cover, the lower side of the vertical unloading channel has an unloading port, and a hook is provided on the outer side of the hole wall of the unloading port, the hook being able to hang the unloading bag.

[0012] According to some embodiments of this utility model, the discharge port includes a contraction section, a throat section, and a diffusion section from top to bottom, and the hook is connected to the outer wall of the contraction section; the contraction section is a tapered tube structure, and the area of ​​the horizontal cross-section at the upper end of the contraction section is greater than the area of ​​the horizontal cross-section at the lower end of the contraction section; the diffusion section is an inverted tapered tube structure, and the area of ​​the horizontal cross-section at the upper end of the diffusion section is smaller than the area of ​​the horizontal cross-section at the lower end of the diffusion section.

[0013] According to some embodiments of the present invention, a powder scraper is provided at the front end of the conveyor belt device. The powder scraper has a scraping blade, and the scraping blade of the powder scraper contacts the conveyor belt device. The powder scraper can scrape off the powder adhering to the conveyor belt device.

[0014] According to some embodiments of the present invention, a bottom channel is provided on the lower side of the sealing cover, the bottom channel has a cavity, the conveyor belt device is located above the bottom channel, and the bottom channel can collect the powder falling to the lower side of the sealing cover.

[0015] According to some embodiments of the present invention, the upper side of the sealing cover has an opening, and the opening is covered by a movable cover plate.

[0016] The conveying device for preventing dust escape according to the embodiments of the present utility model has at least the following technical effects:

[0017] 1. The baffles on both sides of the conveyor belt device are designed to be inclined, which can collect dust and move it along the center line. During the conveying process, the powder is gathered between the baffles on the conveyor belt device to prevent dust from escaping.

[0018] 2. The dust suppression skirt forms a local sealed space with the inner wall of the sealing cover, the conveyor belt device, and the baffle, which can block the upward airflow of dust and block the dust leaking from the baffle position, further preventing dust from escaping.

[0019] 3. The dust concentration sensor monitors the internal dust concentration in real time and sends a signal based on the dust condition detected in the negative pressure air duct. The centrifugal fan can then automatically adjust its suction power according to the signal from the dust concentration sensor to achieve energy saving and consumption reduction.

[0020] 4. The weighing roller measures the weight of the powder on the upper belt through a pressure sensor and outputs a signal according to the weight of the powder monitored by the pressure sensor. The drive motor can then control the speed of the conveyor belt and control the amount of powder conveyed based on the signal from the pressure sensor.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] Additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0023] Figure 1 This is a perspective view of the present invention;

[0024] Figure 2 This is a cross-sectional view of the conveyor belt device of this utility model;

[0025] Figure 3 This is a perspective view of the dust-suppressing skirt panel of this utility model;

[0026] Figure 4 This is a schematic diagram of the operation of the conveyor belt device of this utility model;

[0027] Figure 5 This is a schematic diagram of the installation of the baffle of this utility model;

[0028] Figure 6 This is a schematic diagram of the installation of the dust suppression skirt panel of this utility model;

[0029] Figure 7 This is a schematic diagram of the structure of the support roller of this utility model;

[0030] Figure 8 This is another installation diagram of the baffle of this utility model;

[0031] Figure 9 This is a schematic diagram of the installation of the powder scraper of this utility model;

[0032] Figure 10 This is a schematic diagram of the powder feeder of this utility model;

[0033] Figure 11 This is a schematic diagram of the vertical unloading channel of this utility model.

[0034] Figure label:

[0035] 100 sealing cover, 110 bottom channel, 111 drain outlet, 120 upper opening of sealing cover, 121 movable cover plate, 130 guide chute; 200 conveyor belt device, 210 drive roller, 211 drive motor, 220 transmission roller, 230 conveyor belt, 231 upper belt, 232 lower belt, 240 weighing roller, 241 pressure sensor, 250 support roller, 251 support rod, 260 scraper, 261 scraper blade, 270 bracket, 2 side plate 71; baffle 300; dust suppression skirt 400, waveform unit 410, wave crest section 411, wave trough section 412, dust suppression space 420; powder feeder 500, drum dryer 510, drum 511, negative pressure air duct 520, centrifugal fan 521, dust concentration sensor 522, material discharge cylinder 530; vertical unloading channel 600, unloading port 610, contraction section 611, throat section 612, diffusion section 613, hook 620, unloading bag 630. Detailed Implementation

[0036] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0037] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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 this utility model.

[0038] In the description of this utility model, "multiple" means two or more, and "greater than," "less than," and "exceeding" are understood to exclude the stated number. Unless otherwise explicitly defined, terms such as "set," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of these terms in this utility model based on the specific content of the technical solution.

[0039] The following is for reference. Figure 1 and Figure 2 This invention describes a conveying device for preventing dust from escaping according to an embodiment of the present invention.

[0040] like Figure 1 and Figure 2 As shown, the conveying device for preventing dust escape according to an embodiment of the present invention includes a sealing cover 100, a conveyor belt device 200, and a baffle 300.

[0041] The sealing cover 100 has a cavity; the conveyor belt device 200 is located inside the sealing cover 100, the conveyor belt device 200 has a centerline extending in the front-back direction, the conveyor belt device 200 can convey powder from back to front along the centerline direction, and the front side of the conveyor belt device 200 serves as the output side; baffles 300 are respectively provided on the left and right sides of the upper side of the conveyor belt device 200, the baffles 300 are installed at an angle, the baffles 300 are inclined in the direction away from the centerline and towards the lower side of the centerline, the lower end of the baffles 300 contacts the upper side of the conveyor belt device 200, and the powder is located between the baffles 300 on the left and right sides.

[0042] For example, such as Figure 1 and Figure 2As shown, the sealing cover 100, as a fixed sealing structure, has a cavity, forming a sealed channel. The conveyor belt device 200 is located inside the sealing cover 100, meaning the conveyor belt device 200 operates within the sealed environment of the sealing cover 100. The conveyor belt device 200 can transport powder forward along the centerline direction, with the front side of the conveyor belt device 200 serving as the output side, completing the centralized conveying of powder. Baffles 300 are respectively provided on the left and right sides of the upper side of the conveyor belt device 200. The baffles 300 are installed at an angle, tilting from the upper side away from the centerline towards the lower side of the centerline. The baffles 300 are relatively fixed. The lower end of the baffles 300 contacts the upper side of the conveyor belt device 200. The powder is located between the left and right baffles 300, ensuring that the powder on the conveyor belt device 200 is concentrated between the two baffles 300.

[0043] In actual operation, during the operation of the conveyor belt device 200, the baffles 300 on both sides remain fixed, with their bottoms adhering to the surface of the conveyor belt device 200. Then, the powder to be conveyed is fed from outside the sealing cover 100 onto the conveyor belt device 200 inside the sealing cover 100. When the powder falls onto the surface of the conveyor belt device 200, the baffles 300 dynamically engage with the conveyor belt device 200. The inclined design of the baffles 300 allows the dust to accumulate and move along the centerline, acting as the first barrier to prevent dust escape. During the process of the conveyor belt device 200 driving the powder forward, the baffles 300 also ensure that the dust gathers between the baffles 300 on the conveyor belt device 200. Once it reaches the output side, it can be collected or used for the next process.

[0044] In some specific embodiments of this utility model, the conveying device of this utility model includes a controller for coordinating and controlling the operation of the conveying device of this utility model.

[0045] In some specific embodiments of this utility model, reference is made to Figure 5 The baffle 300 is a rectangular plate structure made of 2205 material.

[0046] In some specific embodiments of this utility model, the upper end of the baffle 300 is welded together with the inner wall of the sealing cover 100.

[0047] In some specific embodiments of this utility model, reference is made to Figure 2 , Figure 4 The baffle 300 forms a 45° angle with the horizontal plane, which is equivalent to a 45° angle between the baffle 300 and the upper surface of the conveyor belt device 200. The vertical distance between the baffle 300 and the surface of the conveyor belt device 200 is 10cm.

[0048] In some embodiments of this utility model, the conveyor belt device 200 includes a bracket 270, and the conveyor belt device 200 is supported in the sealing cover 100 by the bracket 270.

[0049] In some specific embodiments of this utility model, the upper end of the baffle 300 is connected to the inner wall of the sealing cover 100 or the bracket 270.

[0050] In some embodiments of this utility model, reference is made to Figure 2 , Figure 3 Dust-suppressing skirts 400 are provided on both sides of the conveyor belt device 200. The dust-suppressing skirts 400 are located between the baffle 300 and the inner wall of the sealing cover 100. The cross-section of the dust-suppressing skirts 400 is corrugated, and the dust-suppressing skirts 400 have a number of corrugated units 410 arranged and connected periodically. The corrugated units 410 are composed of alternating crests 411 and troughs 412. The crests 411 are located away from the center line, and the troughs 412 are located close to the center line. Dust-suppressing spaces 420 are formed between adjacent crests 411 and adjacent troughs 412. This is equivalent to the dust-suppressing skirts 400 being perpendicularly connected to the conveyor belt device 200. The dust-suppressing skirt 400 moves synchronously with the conveyor belt device 200. The dust-suppressing skirt 400, the inner wall of the sealing cover 100, the conveyor belt device 200, and the baffle 300 form a partially sealed space. Each dust-suppressing space 420, in conjunction with the baffle 300, can block the upward airflow of dust and prevent dust leakage from the baffle 300, acting as another barrier to prevent dust escape. The blocked dust is collected in the dust-suppressing space 420 and will not escape.

[0051] In some specific embodiments of this utility model, reference is made to Figure 6 The dust suppression skirt 400 is glued and sealed to the conveyor belt 230 of the conveyor belt device 200.

[0052] In some specific embodiments of this utility model, the crest portion 411 and the trough portion 412 are semi-circular. This design ensures that the dust suppression space 420 is larger. Moreover, this design makes the waveform unit 410 more stable on the conveyor belt device 200, ensuring that the dust collected in the dust suppression space 420 will not escape.

[0053] In some embodiments of this utility model, the conveying device further includes a powder feeder 500, see reference. Figure 1 , Figure 10The powder feeder 500 includes a drum dryer 510, a negative pressure duct 520, and a discharge cylinder 530. The drum dryer 510 contains a drum 511. The negative pressure duct 520 is located on the upper side of the drum dryer 510 and houses a centrifugal fan 521. The centrifugal fan 521 creates negative pressure within the drum dryer 510. The discharge cylinder 530 connects the output side of the drum dryer 510 to the upper side of the sealing cover 100. After entering the powder feeder 500 from the input side of the drum dryer 510, the powder is dried by the drum 511 and then discharged from the output side of the drum dryer 510, falling into the sealing cover 100 via the discharge cylinder 530.

[0054] The powder feeder 500 is a device that inputs powder into the conveyor belt device 200. The drum dryer 510 is the core component of the powder feeder 500, and its internal rotatable drum 511 is mainly used for drying materials. The negative pressure duct 520 is located on the upper side of the drum dryer 510, and is equipped with a centrifugal fan 521 and a dust concentration sensor 522. The centrifugal fan 521 generates strong suction through high-speed rotation, creating a stable negative pressure environment inside the drum dryer 510. This allows the negative pressure duct 520 to collect dust escaping from the drum 511, controlling dust at its source and effectively improving drying efficiency.

[0055] In a further embodiment of this utility model, the negative pressure duct 520 has a built-in dust concentration sensor 522. The dust concentration sensor 522 and the centrifugal fan 521 work in coordination through a controller. The dust concentration sensor 522 monitors the internal dust concentration in real time, and sends a signal to the controller based on the dust condition detected by the dust concentration sensor 522. Then, the centrifugal fan 521 can automatically adjust its suction power according to the signal sent by the dust concentration sensor 522, thereby achieving energy saving and consumption reduction.

[0056] The discharge cylinder 530 is connected between the output side of the drum dryer 510 and the upper side of the sealing cover 100, serving the functions of material transfer and sealing, ensuring that the powder does not leak during the transfer into the sealing cover 100, and maintaining the airtightness and efficiency of the entire system.

[0057] In some embodiments of this utility model, reference is made to Figure 1 , Figure 2The conveyor belt device 200 includes a support 270, a rear drive roller 210, a front transmission roller 220, and a conveyor belt 230. The conveyor belt 230 is fitted onto the drive roller 210 and the transmission roller 220. The drive roller 210 is connected to a drive motor 211. The upper end of the baffle 300 is connected to the inner wall of the sealing cover 100 or the support 270. The conveyor belt 230 has an upper belt 231 and a lower belt 232. The powder is placed on the upper side of the upper belt 231. A weighing roller 240 is installed on the lower side of the upper belt 231, with the upper side of the weighing roller 240 pressing against the lower side of the upper belt 231. The weighing roller 240 has a pressure sensor 241. The drive roller 210, the transmission roller 220, and the weighing roller 240 are connected to the support 270. In actual operation, the drive motor 211 drives and controls the drive roller 210 to rotate, thereby moving the conveyor belt 230 to complete the powder conveying work.

[0058] The upper end of the baffle 300 is connected to the inner wall of the sealing cover 100 or the bracket 270. Ensure that the baffle 300 is securely connected and does not interfere with the operation of the conveyor belt device 200.

[0059] The weighing roller 240 measures the weight of the powder on the upper belt 231 through the pressure sensor 241, and outputs a signal according to the weight of the powder monitored by the pressure sensor 241. The drive motor 211 can then control the moving speed of the conveyor belt 230 and control the amount of powder conveyed according to the signal from the pressure sensor 241.

[0060] In some specific embodiments of this utility model, the drive motor 211 is a variable frequency motor.

[0061] In some specific embodiments of this utility model, the weighing roller 240 is located below the material discharge cylinder 530.

[0062] In some specific embodiments of this utility model, the bearing seats at both ends of the weighing roller 240 are mounted on the pressure sensor 241. The pressure sensor 241 detects the weight of the powder and can then send a signal to the controller.

[0063] In some specific embodiments of this utility model, the dust suppression skirt 400 is connected to the conveyor belt 230, and the dust suppression skirt 400 is located at a position extending from the upper side of the upper belt 231 to the lower side of the lower belt 232.

[0064] In some embodiments of this utility model, reference is made to Figure 2 , Figure 4Support rollers 250 are provided on the underside of the upper belt 231 and the lower belt 232. The upper side of the support rollers 250 abuts against the lower side of the upper belt 231 or the lower belt 232. In this way, the support rollers 250 can support the upper belt 231 and the lower belt 232 of the conveyor belt 230, supporting and assisting in the operation of the conveyor belt 230, ensuring a sufficiently smooth powder conveying process. (Refer to...) Figure 7 Support rollers 250 should be used in sets of at least two.

[0065] In some embodiments of this utility model, the conveyor belt 230 is made of shape memory rubber material, so that the conveyor belt 230 automatically repairs the gaps caused by wear after being heated.

[0066] In some embodiments of this utility model, the outer surface of the conveyor belt 230 has a carbon fiber conductive layer to prevent electrostatic adsorption of dust.

[0067] In some embodiments of this utility model, the outer surface of the conveyor belt 230 has a molded diamond-shaped anti-slip pattern, which is equivalent to increasing the surface friction of the conveyor belt 230, reducing the material sliding speed, and helping to reduce dust caused by friction.

[0068] In some embodiments of this utility model, the conveyor belt device 200 further includes a bracket 270, and the drive roller 210, drive motor 211 and transmission roller 220 are fixed on the bracket 270.

[0069] In some specific embodiments of this utility model, the support 270 of the conveyor belt device 200 is provided with support legs, and an additional support leg is added for every 3 meters increase in the length of the conveyor belt to support the conveyor belt device 200.

[0070] In some embodiments of this utility model, reference is made to Figure 1 , Figure 11 A vertical discharge channel 600 is provided on the front side of the conveyor belt device 200. The upper end of the vertical discharge channel 600 is connected to the front end of the sealing cover 100, and the lower side of the vertical discharge channel 600 has a discharge port 610. A hook 620 is provided on the outer side of the hole wall of the discharge port 610, which can hang the discharge bag 630. In this way, the powder conveyed by the conveyor belt device 200 can directly pass through the vertical discharge channel 600 and be discharged from the discharge port 610 and fall into the discharge bag 630 for collection after exiting the output side. This can improve the efficiency of powder collection.

[0071] In some embodiments of this utility model, reference is made to Figure 11The discharge port 610 has a Venturi tube structure, comprising a contraction section 611, a throat section 612, and a diffuser section 613 from top to bottom. A hook 620 is connected to the outer wall of the contraction section 611. The contraction section 611 is a tapered tube structure, with the area of ​​its upper horizontal cross-section larger than that of its lower horizontal cross-section. The diffuser section 613 is an inverted tapered tube structure, with the area of ​​its upper horizontal cross-section smaller than that of its lower horizontal cross-section. This Venturi design of the discharge port 610 increases the flow rate of powder as it passes through the throat section 612. Conversely, the velocity decreases as the powder passes through the throat section 612 and reaches the diffuser section 613. This design effectively reduces dust dispersion when the powder enters the discharge bag 630. Through practice, the aforementioned Venturi-designed discharge port 610 can achieve a dust collection efficiency of 98%.

[0072] In some embodiments of this utility model, reference is made to Figure 1 , Figure 2 A scraper 260 is provided at the front end of the conveyor belt device 200. The bottom channel 110 has a cavity, and the conveyor belt device 200 is located above the bottom channel 110. The scraper 260 can scrape off the powder adhering to the conveyor belt device 200. (Refer to...) Figure 9 That is, when the powder passes through the scraper plate 260, the scraper plate 260 can scrape off the powder on the conveyor belt device 200, ensuring that the powder will not remain on the conveyor belt device 200, ensuring more complete output of powder, and also avoiding long-term accumulation of dust on the conveyor belt device 200.

[0073] In some specific embodiments of this utility model, the powder scraper 260 is a polyurethane scraper.

[0074] In some embodiments of this utility model, reference is made to Figure 4 A bottom channel 110 is provided on the lower side of the sealing cover 100. The bottom channel 110 has a cavity, and the conveyor belt device 200 is located above the bottom channel 110. The bottom channel 110 can collect the powder falling to the lower side of the sealing cover 100. The powder in the bottom channel 110 can be discharged into the workshop wastewater treatment system through the drain outlet 111 or other means, serving as another barrier to prevent dust from escaping.

[0075] In some specific embodiments of this utility model, a drain outlet 111 is provided on the bottom wall or side wall of the bottom channel 110 so that the powder material of the bottom channel 110 can be discharged through the drain outlet 111.

[0076] In some specific embodiments of this utility model, the bottom channel 110 is equipped with a dust collection plate, which is a detachable structure. Powder falling into the bottom channel 110 can be collected on the dust collection plate. The dust collection plate can be removed periodically to empty and clean the dust on the plate, keeping the bottom channel 110 clean.

[0077] In some specific embodiments of this utility model, reference is made to Figure 8 A rectangular side plate 271, made of material 2205, is welded to the inner wall of the sealing cover 100 or the outer side of the support 270 of the conveyor belt device 200. The side plate 271 is 20cm above the surface of the upper belt 231 and 10cm below the surface of the lower belt 232. The distance between the surfaces of the upper belt 231 and the lower belt 232 is 15cm, and the total height of the side plate 271 is 45cm. The upper end of the baffle 300 is welded to the side plate 271.

[0078] In some embodiments of this utility model, reference is made to Figure 1 The sealing cover 100 has an opening 120 on its upper side, and a movable cover plate 121 is closed over the opening 120. The movable cover plate 121 can be disassembled, facilitating observation and maintenance of the conveyor belt device 200. When the movable cover plate 121 is closed, it serves as another barrier to prevent dust from escaping.

[0079] In some specific embodiments of this utility model, the movable cover plate 121 is made of PP material, which can achieve segmented and quick disassembly and assembly without compromising airtightness.

[0080] In some specific embodiments of this utility model, a handle is provided above the movable cover plate 121 to facilitate installation and disassembly by operators.

[0081] In some specific embodiments of this utility model, the movable cover plate 121 is a rectangular plate.

[0082] In some specific embodiments of this utility model, a material guide groove 130 is provided on the upper side of the sealing cover 100. The material guide groove 130 is bonded to the upper side wall of the sealing cover 100 or the upper side of the movable cover plate 121 by a thermoformed sealing strip. The material guide groove 130 adopts an inverted cone shape, and the inner layer of the material guide groove 130 is a polymer damping liner, which can reduce the impact drop of materials. The material guide groove 130 can further reduce dust dispersion by at least 40%.

[0083] In some specific embodiments of this utility model, right-angled trapezoidal covers are installed at the turning points at both ends of the sealing cover 100. The right-angled trapezoidal covers are made of PP material. The rectangular sealing cover 100 is closely connected with the right-angled trapezoidal covers to form a fully enclosed sealed channel for the conveyor belt.

[0084] In some specific embodiments of this utility model, the dry powder conveying device includes the dust-preventing conveying device described above, used for conveying dry powder generated from drying saline wastewater in a drum dryer. By employing the aforementioned dust-preventing conveying device, the dry powder conveying device according to the embodiments of this utility model reduces dust emission from the conveying device, facilitating a clean working design and improving the working environment.

[0085] Other configurations and operations of the conveying device according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0086] The following is for reference. Figure 1 and Figure 2 A conveying device for preventing dust escape according to an embodiment of the present invention is described in detail with reference to a specific example. It is to be understood that the following description is merely illustrative and not intended to limit the scope of the invention.

[0087] like Figure 1 and Figure 2 As shown, the conveying device for preventing dust dispersion according to this utility model embodiment includes a sealing cover 100, a conveyor belt device 200, a baffle 300, a dust suppression skirt 400, a powder feeder 500, and a vertical unloading channel 600, used to convey dry powder generated by the drum dryer drying saline wastewater.

[0088] A bottom channel 110 is provided on the lower side of the sealing cover 100, and a material guide trough 130 and an upper opening 120 are provided on the upper side of the sealing cover 100. A movable cover plate 121 is fitted over the upper opening 120. A vertical unloading channel 600 is connected to the output side of the sealing cover 100. A discharge port 610, a hook 620, and a discharge bag 630 are provided on the lower side of the vertical unloading channel 600. The discharge port 610 includes a contraction section 611, a throat section 612, and a diffusion section 613.

[0089] The conveyor belt device 200 includes a drive roller 210, a drive motor 211, a transmission roller 220, a conveyor belt 230, a weighing roller 240, a pressure sensor 241, support rollers 250, and a scraper 260. The conveyor belt 230 includes an upper belt 231 and a lower belt 232. The support frame 270 of the conveyor belt device 200 is equipped with support legs, with one support leg added for every 3 meters of conveyor belt length. Symmetrical circular holes are equally spaced on both sides of the support frame 270, and support rods 251 are installed between the symmetrical circular holes to support and fix the fixed wheels of the rollers 250.

[0090] A rectangular side plate 271, made of material 2205, is welded to the inner wall of the sealing cover 100 or the outer side of the support 270 of the conveyor belt device 200. The side plate 271 is 20cm above the surface of the upper belt 231 and 10cm below the surface of the lower belt 232. The distance between the surfaces of the upper belt 231 and the lower belt 232 is 15cm, and the total height of the side plate 271 is 45cm. Baffles 300 are installed on the side plate 271. Baffles 300 are respectively located on the left and right sides of the upper side of the conveyor belt device 200. A dust suppression skirt 400 is connected to the conveyor belt 230. The dust suppression skirt 400 includes wave units 410 connected together. The wave unit 410 includes a crest portion 411, a trough portion 412, and a dust suppression space 420.

[0091] The powder feeder 500 is located next to the sealing cover 100. The powder feeder 500 includes a drum dryer 510, a drum 511, a negative pressure air duct 520, a centrifugal fan 521, a dust concentration sensor 522, and a discharge cylinder 530.

[0092] During operation, saline wastewater enters the drum dryer 510 for drying. The centrifugal fan 521 is turned on, and its frequency is automatically adjusted based on the dust concentration signal transmitted by the internal dust concentration sensor 522. With the centrifugal fan 521 running, key dust-generating points (such as the loading end and turning points) within the drum dryer 510 and the sealing cover 100 are under negative pressure, allowing dust to flow along the designed channels and preventing dust escape. The dried material from the drum dryer 510 enters the conveyor belt device 200 through the discharge cylinder 530 and the guide chute 130. The discharge cylinder 530 is spaced at equal intervals along the conveyor belt device 200. A weighing roller 240 is installed below the guide chute 130. Bearings at both ends of the weighing roller 240 are mounted on pressure sensors 241 to measure the material weight and transmit the signal to a signal controller. This signal is then sent to the drive motor 211, which operates at a variable frequency based on the received pressure signal. The conveyor belt 230 runs alongside the drive roller 210.

[0093] Baffles 300 are installed on both sides of the conveyor belt device 200, which cooperate with the conveyor belt 230 to collect dust and move it along the direction of the conveyor belt's rotation, preventing dust from overflowing. The baffles 300 serve as the first barrier against dust dispersion. Simultaneously, dust-suppressing skirts 400 are installed on both sides of the conveyor belt 230. The dust-suppressing skirts 400 are located between the side wall of the sealing cover 100 and the baffles 300, forming a partially sealed space with the conveyor belt device 200, blocking the upward airflow of dust. The dust-suppressing skirts 400 serve as the second barrier against dust dispersion.

[0094] As materials are transported along the conveyor belt, they pass through a fully enclosed sealing cover 100, which has a detachable movable cover 121 on top, allowing for quick and easy disassembly and assembly in sections without compromising airtightness. A handle is provided on top of the movable cover 121 for easy installation and removal by operators. The movable cover 121 serves as a third barrier to prevent dust escape. The sealing cover 100 has an internal maintenance passage for easy unclogging and observation of salt discharge, without affecting material loading and inspection, thus reducing maintenance time and costs.

[0095] When the material reaches the end of the conveyor belt, it comes into contact with the scraper blade 260, and the dry material is scraped off in real time to the discharge port 610. The discharge port 610 is equipped with a hook 620 as a ton bag hanger to support the discharge bag 630. The discharge bag 630 serves as a ton bag for easy material collection. The discharge port 610 is vertically set and adopts a venturi design to achieve material transfer without drop, which can effectively reduce dust flying.

[0096] The device has a bottom channel 110 at the bottom, which is used to collect powder and liquid leakage, and discharge them into the workshop wastewater treatment system through the sewage outlet, serving as the fourth barrier to prevent dust from escaping.

[0097] According to the embodiment of the present invention, the conveying device for preventing dust dispersion can achieve at least the following effects through the following configuration: the baffles 300 on both sides of the conveyor belt device 200 are designed with inclination, which can collect dust and move along the centerline direction to prevent dust dispersion; the dust suppression skirt 400 forms a local sealed space with the inner wall of the sealing cover 100, the conveyor belt device 200, and the baffles 300, which can block the upward airflow of dust and block the dust leaking from the position of the baffles 300, serving as another barrier to prevent dust dispersion; the four barriers of baffles 300, dust suppression skirt 400, fully enclosed sealing cover 100, and bottom channel 110 can effectively suppress dust, with a dust suppression efficiency of ≥95%, meeting environmental emission standards; the drive motor 211 and centrifugal fan 521 operate by frequency conversion according to the signals transmitted by the pressure sensor 241 and the dust concentration sensor 522, respectively, and intelligent regulation reduces energy consumption by 20%~30%.

[0098] In the description of this specification, references to terms such as "some embodiments" or "as one might imagine" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0099] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A conveying device for preventing dust escape, characterized in that, include: The sealing cover (100) has a cavity; A conveyor belt device (200) is located inside the sealing cover (100). The conveyor belt device (200) has a centerline extending in the front-back direction. The conveyor belt device (200) can convey powder from back to front along the centerline direction. The front side of the conveyor belt device (200) serves as the output side. Baffles (300) are respectively provided on the left and right sides of the upper side of the conveyor belt device (200). The baffles (300) are installed at an angle and are inclined from the upper side away from the center line to the lower side of the center line. The lower end of the baffles (300) is in contact with the upper side of the conveyor belt device (200). The powder is located between the baffles (300) on the left and right sides.

2. The conveying device for preventing dust escape according to claim 1, characterized in that, Dust-suppressing skirts (400) are provided on the left and right sides of the conveyor belt device (200). The dust-suppressing skirts (400) are located between the baffle (300) and the inner wall of the sealing cover (100). The cross-section of the dust-suppressing skirts (400) is wave-shaped. The dust-suppressing skirts (400) have a number of wave units (410) arranged and connected periodically. The wave unit (410) is composed of alternating peaks (411) and troughs (412). The peaks (411) are located away from the center line, and the troughs (412) are located close to the center line. Dust-suppressing spaces (420) are formed between adjacent peaks (411) and adjacent troughs (412).

3. The conveying device for preventing dust escape according to claim 1, characterized in that, It also includes a powder feeder (500), which includes a drum dryer (510), a negative pressure air duct (520) and a discharge cylinder (530). The drum dryer (510) is equipped with a drum (511). The negative pressure air duct (520) is located on the upper side of the drum dryer (510). The negative pressure air duct (520) is equipped with a centrifugal fan (521). The centrifugal fan (521) can create a negative pressure inside the drum dryer (510). The discharge cylinder (530) is connected between the output side of the drum dryer (510) and the upper side of the sealing cover (100). The negative pressure duct (520) has a built-in dust concentration sensor (522).

4. The conveying device for preventing dust escape according to claim 1, characterized in that, The conveyor belt device (200) includes a bracket (270), a rear drive roller (210), a front transmission roller (220), and a conveyor belt (230). The conveyor belt (230) is sleeved on the drive roller (210) and the transmission roller (220). The drive roller (210) is connected to a drive motor (211). The upper end of the baffle (300) is connected to the inner wall of the sealing cover (100) or the bracket (270). The conveyor belt (230) has an upper belt (231) and a lower belt (232). The powder is placed on the upper belt (231). A weighing roller (240) is provided on the lower side of the upper belt (231). The upper side of the weighing roller (240) presses against the lower side of the upper belt (231). The weighing roller (240) has a pressure sensor (241). The drive roller (210), the transmission roller (220), the weighing roller (240) are connected to the bracket (270).

5. The conveying device for preventing dust escape according to claim 4, characterized in that, The upper belt (231) and the lower belt (232) are provided with support rollers (250), and the upper side of the support rollers (250) abuts against the lower side of the upper belt (231) or the lower side of the lower belt (232).

6. The conveying device for preventing dust escape according to claim 1, characterized in that, The conveyor belt device (200) is provided with a vertical unloading channel (600) on the front side. The upper end of the vertical unloading channel (600) is connected to the front end of the sealing cover (100). The lower side of the vertical unloading channel (600) has an unloading port (610). A hook (620) is provided on the outer side of the hole wall of the unloading port (610). The hook (620) can hang the unloading bag (630).

7. The conveying device for preventing dust escape according to claim 6, characterized in that, The discharge port (610) includes, from top to bottom, a contraction section (611), a throat section (612), and a diffusion section (613), and the hook (620) is connected to the outer wall of the contraction section (611); The contraction section (611) is a tapered tube structure, and the area of ​​the upper horizontal cross section of the contraction section (611) is greater than the area of ​​the lower horizontal cross section of the contraction section (611). The diffusion section (613) is an inverted tapered tube structure, and the area of ​​the upper horizontal cross section of the diffusion section (613) is less than the area of ​​the lower horizontal cross section of the diffusion section (613).

8. The conveying device for preventing dust escape according to claim 1, characterized in that, The front end of the conveyor belt device (200) is provided with a scraper plate (260), the scraper plate (260) has a scraper blade (261), and the scraper blade (261) of the scraper plate (260) is in contact with the conveyor belt device (200).

9. The conveying device for preventing dust escape according to claim 1, characterized in that, A bottom channel (110) is provided on the lower side of the sealing cover (100), the bottom channel (110) has a cavity, and the conveyor belt device (200) is located above the bottom channel (110).

10. The conveying device for preventing dust escape according to claim 1, characterized in that, The sealing cover (100) has an upper opening (120) on its upper side, and the upper opening (120) is covered by a movable cover plate (121).

Images