An automatic closed-loop powder material conveying device

Abstract

This utility model discloses a closed-loop automatic powder material conveying device, including a vibrating screen, at least two receiving containers, a vacuum conveyor, and a transfer silo. The inlet of each receiving container corresponds to the outlet of the vibrating screen. The vacuum conveyor is connected to the receiving container for receiving qualified products and to the transfer silo. The device is characterized by further including a sealed shell, a first conveying pipe, and a second conveying pipe. The vibrating screen and each receiving container are located inside the sealed shell. The first conveying pipe is connected to the vibrating screen, and its inlet end is outside the sealed shell. The receiving container for receiving qualified products and the vacuum conveyor are respectively connected to both ends of the second conveying pipe. This closed-loop automatic powder material conveying device effectively prevents dust spillage, maintains workshop cleanliness, protects worker safety, and has a high degree of automation, thus improving production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of material conveying equipment technology, and in particular to a closed-type automatic conveying device for powder materials. Background Technology

[0002] In the industrial production of powder materials, key processes such as crushing, grinding, mixing, and sieving have long relied on traditional production equipment. However, existing traditional powder production equipment suffers from several significant technical deficiencies in its design and operation:

[0003] 1. Insufficient safety: In the transfer of powder materials, frequent manual handling is generally relied upon, which can easily lead to work-related accidents due to material slippage, equipment operation errors, etc. At the same time, some powder materials are corrosive or toxic, and direct contact with people poses serious occupational health and safety hazards. In addition, the high concentration of dust that spills out and is inhaled by operators can damage their respiratory system and increase the incidence of occupational diseases.

[0004] 2. Serious environmental pollution: Dust overflow during the production process is extremely common, which not only causes serious pollution to the workshop environment, but also leads to the deterioration of air quality in the work area.

[0005] 3. Poor operational stability: Traditional powder material production equipment mostly adopts an open or semi-open structure. This structural feature makes it susceptible to the intrusion of external foreign objects (such as dust, debris, etc.), which in turn interferes with the normal material conveying process, causing frequent equipment jams, blockages and other malfunctions, seriously affecting the continuity of production, reducing production efficiency and increasing production costs.

[0006] 4. Weak adaptability to different scenarios: Due to poor equipment sealing performance, it cannot meet the strict requirements for sealing and dust-free environments in special production environments such as cleanrooms and explosion-proof workshops. This greatly limits the application of traditional powder production equipment in industries with high requirements for production environment, such as pharmaceuticals, food, and electronics, and makes it difficult to adapt to the needs of diversified production scenarios.

[0007] In existing technologies, some feeding devices attempt to improve the dust overflow problem through simple sealing measures, but they have failed to form a fully enclosed protection system, and the dust control effect is limited. Moreover, these devices have a low degree of automation, and while improving production safety, they are difficult to balance production efficiency. Utility Model Content

[0008] The technical problem to be solved by this utility model is to provide a closed-type automatic powder material conveying device. This closed-type automatic powder material conveying device can effectively prevent dust from overflowing, keep the workshop clean, protect the personal safety of workers, and has a high degree of automation, which is conducive to improving production efficiency.

[0009] To solve the above technical problems, the following technical solution is adopted:

[0010] An enclosed automatic powder material conveying device includes a vibrating screen, at least two receiving containers, a vacuum conveyor, and a transfer silo. The inlet of each receiving container corresponds to the outlet of the vibrating screen. The inlet of the vacuum conveyor is connected to the outlet of the receiving container used to receive qualified products, and the outlet of the vacuum conveyor is connected to the inlet of the transfer silo. The device is characterized by further including a sealed housing, a first conveying pipe, and a second conveying pipe. The vibrating screen and each receiving container are located inside the sealed housing. The sealed housing has a first through hole and a second through hole. The first conveying pipe passes through the first through hole, and its outlet is connected to the inlet of the vibrating screen, while its inlet is outside the sealed housing. The second conveying pipe passes through the second through hole, and the outlet of the receiving container used to receive qualified products and the inlet of the vacuum conveyor are respectively connected to both ends of the second conveying pipe.

[0011] In the aforementioned closed-type automatic powder material conveying device, the feed end of the first conveying pipe can be connected to the discharge port of the powder material production equipment (such as a spray granulator). The powder material production equipment conveys the prepared powder material to the vibrating screen. The vibrating screen screens the powder material, separates the powder material that meets the specifications (i.e., qualified products), and sends it into the receiving container for receiving qualified products. The vacuum feeder periodically sucks up the powder material in the receiving container for receiving qualified products (generally once every 15 seconds) and sends the powder material into the turnover silo. During this process, a large amount of dust is generated when the vibrating screen screens powder materials. By setting up a sealed shell to cover the vibrating screen and each receiving container, the entire material screening process can be carried out inside the sealed shell, preventing dust from overflowing. Furthermore, by using conveying pipes to connect the powder material production equipment and the vibrating screen, as well as the receiving containers and the vacuum conveyor, dust overflow during the conveying process can be further avoided. This effectively confines the dust within the sealed shell, thereby maintaining the cleanliness of the workshop and protecting the personal safety of the workers.

[0012] Both the vibrating screen and the vacuum feeder mentioned above can be conventional equipment. The number of receiving containers depends on the number of discharge ports of the vibrating screen. Typically, there are three receiving containers: one for receiving qualified products (i.e., powder materials that meet specifications), one for receiving unqualified products with excessively large particles, and another for receiving unqualified products with excessively small particles. If only powder materials with excessively large particles need to be screened out, only two receiving containers can be used: one for receiving qualified products and the other for receiving unqualified products with excessively large particles.

[0013] In a preferred embodiment, the enclosed automatic powder material conveying device further includes a dust concentration sensor and a dust removal device. The dust concentration sensor is located inside the sealed housing, and the exhaust port of the dust removal device is connected to the interior of the sealed housing. Furthermore, the dust concentration sensor is located at the top inside the sealed housing. The dust concentration sensor monitors the dust concentration inside the sealed housing in real time. When the dust concentration is too high (typically > 50 mg / m³), the dust removal device is activated to remove the dust. The dust removal device generally employs a vacuum pump and a dust collection box. The vacuum pump draws the dust from inside the sealed housing, where it is collected by the dust collection box.

[0014] In a preferred embodiment, the sealed housing includes a cuboid frame, a safety door, and multiple transparent panels. The safety door is openable and closable on one side of the cuboid frame, and its edge is equipped with a sealing strip. The transparent panels are respectively installed on the other sides of the cuboid frame and are sealed. The transparent panels facilitate observation of the equipment inside the sealed housing; the safety door facilitates opening and operation; and the sealing strips improve sealing performance when the door is closed. The transparent panels are typically made of transparent acrylic; the cuboid frame is typically made of stainless steel; and the sealing strips are typically made of silicone. Generally, the transparent panels are detachably installed on the cuboid frame using clips, allowing for quick disassembly and maintenance when needed.

[0015] In a preferred embodiment, the turnover hopper includes a turnover trolley and a turnover frame. The turnover frame has a placement space for the turnover trolley to pass through, and the turnover trolley has an upward-facing holding cavity. The turnover trolley is located within the placement space of the turnover frame, and the opening of the holding cavity is connected to the discharge port of the vacuum conveyor. In this way, the vacuum conveyor transports powder materials from a receiving container used to receive qualified products to the turnover trolley. When the turnover trolley is full, workers can directly push the turnover trolley away and replace it with a new one, making transfer convenient and effectively ensuring safety. Typically, the turnover trolley is equipped with a pusher.

[0016] In a further preferred embodiment, the turnover frame includes a top plate and two side plates, the upper edges of which are connected to the left and right edges of the top plate, respectively. The top plate and the two side plates form a through-hole. The top plate has a third through hole. The turnover hopper also includes a telescopic connecting pipe, a turnover cart cover, and a lifting drive device that can drive the turnover cart cover to rise and fall. The lifting drive device is installed on the top plate. The turnover cart cover matches the opening shape of the turnover cart. The turnover cart cover has a fourth through hole that matches the lower opening of the telescopic connecting pipe. The upper end of the telescopic connecting pipe is connected to the discharge port of the vacuum lifting machine. The lower end of the telescopic connecting pipe passes through the third through hole and is connected to the edge of the fourth through hole. When the trolley enters the placement space to be filled with material, the lifting drive device lowers the trolley's top cover and covers the opening, at which point the telescopic connecting pipe is extended. The vacuum feeder extracts the powder material from the corresponding receiving container and allows it to enter the trolley directly through the fourth through-hole via the telescopic connecting pipe. During this process, the trolley's opening is sealed, preventing material spillage and scattering. Therefore, in conjunction with the sealed housing, the entire material conveying process can be dust-free, solving the dust pollution problem of traditional equipment. The telescopic connecting pipe typically uses a retractable PVC flexible hose (such as a PVC steel wire hose).

[0017] In a further preferred embodiment, the turnover silo also includes a weighing platform, which is located at the bottom of the placement space. The turnover cart is situated within the placement space of the turnover frame and placed on the weighing platform. The weighing platform can be a platform scale, typically buried in the ground with its upper surface flush with the ground. When the turnover cart is in the placement space, as powder material enters the cart, the platform scale weighs it. When the weight of the turnover cart reaches a preset weight, an alarm or other notification can be used to notify workers to remove and replace the cart.

[0018] In a further preferred embodiment, the transfer cart has multiple wheels at its bottom, and a material outlet is located at the bottom of the holding chamber, with a valve at the outlet. The lower part of the holding chamber is funnel-shaped. Typically, a DN50-PP ball valve is used. The transfer cart is also generally equipped with an electromagnetic vibrator, which drives the holding chamber and the powder material inside to vibrate. The electromagnetic vibrator prevents material agglomeration from clogging the material outlet.

[0019] The beneficial effects of this invention are as follows: This enclosed automatic powder material conveying device can effectively prevent dust spillage, maintain workshop cleanliness, protect worker safety, and has a high degree of automation, which is conducive to improving production efficiency. Trial operation of this device in a cathode material production workshop showed that dust spillage was reduced by more than 98% compared to traditional equipment, and the workshop dust concentration was ≤10mg / m³, meeting the occupational exposure limits of GBZ 2.1-2019. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the enclosed automatic powder material conveying device in the embodiment of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the sealing shell in an embodiment of the present invention. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0023] like Figure 1-2 The diagram shows a closed-loop automatic powder material conveying device, comprising a first conveying pipe 1, a vibrating screen 2, two receiving containers 3, a sealed housing 4, a second conveying pipe 5, a vacuum conveyor 6, and a transfer silo 7. The inlets of each receiving container 3 correspond to the outlets of the vibrating screen 2. The inlet of the vacuum conveyor 6 is connected to the outlet of the receiving container 3 used to receive qualified products, and the outlet of the vacuum conveyor 6 is connected to the inlet of the transfer silo 7. The vibrating screen 2 and each receiving container... All three components are located inside the sealed housing 4, which has a first through hole 401 and a second through hole 402. The first conveying pipe 1 passes through the first through hole 401, and its outlet end is connected to the inlet of the vibrating screen 2. The inlet end of the first conveying pipe 1 is outside the sealed housing 4. The second conveying pipe 5 passes through the second through hole 402, and its outlet and the inlet of the receiving container 3 for receiving qualified products and the vacuum feeder 6 are respectively connected to the two ends of the second conveying pipe 5.

[0024] In the above-mentioned closed-type automatic powder material conveying device, the feed end of the first conveying pipe 1 can be connected to the discharge port of the powder material production equipment 8 (such as a spray granulator). The powder material production equipment 8 conveys the prepared powder material to the vibrating screen 2. The vibrating screen 2 screens the powder material, separates the powder material that meets the specifications (i.e., qualified products) and sends it into the receiving container 3 for receiving qualified products. The vacuum feeder 6 periodically sucks up the powder material in the receiving container 3 for receiving qualified products (generally once every 15 seconds) and sends the powder material into the turnover silo 7. During this process, a large amount of dust is generated when the vibrating screen 2 screens the powder material. By setting up a sealed shell 4 to cover the vibrating screen 2 and each receiving container 3, the entire material screening process can be carried out inside the sealed shell 4, and there will be no dust overflow. Furthermore, by using conveying pipes to connect the powder material production equipment 8 and the vibrating screen 2, and the receiving container 3 and the vacuum conveyor 6, dust overflow during the conveying process can be further avoided, effectively confining the dust within the sealed shell 4, thereby maintaining the cleanliness of the workshop and protecting the personal safety of the workers.

[0025] Both the vibrating screen 2 and the vacuum feeder 6 mentioned above can be conventional equipment. The number of receiving containers 3 is determined according to the number of discharge ports of the vibrating screen 2. Of the two receiving containers 3, one receiving container 3 is used to receive qualified products, and the other receiving container 3 is used to receive unqualified products with excessively large particles.

[0026] The enclosed automatic powder material conveying device also includes a dust concentration sensor 9 and a dust removal device 10. The dust concentration sensor 9 is located inside the sealed housing 4, and the exhaust port of the dust removal device 10 is connected to the inside of the sealed housing 4. Furthermore, the dust concentration sensor 9 is located at the top inside the sealed housing 4. The dust concentration sensor 9 detects the dust concentration inside the sealed housing 4 in real time. When the dust concentration is too high (typically >50 mg / m³), the dust removal device 10 is activated to remove the dust. The dust removal device 10 includes a vacuum pump 1001 and a dust collection box 1002. The vacuum pump 1001 draws dust from inside the sealed housing 4 and collects it in the dust collection box 1002.

[0027] The sealed housing 4 includes a cuboid frame 403, a safety door 404, and multiple transparent panels 405. The safety door 404 is openable and closable on one side of the cuboid frame 403, and its edge is equipped with a sealing strip. The transparent panels 405 are respectively installed on the other sides of the cuboid frame 403 and are sealed. The transparent panels 405 facilitate observation of the internal equipment of the sealed housing 4; the safety door 404 facilitates opening and operation; and the sealing strips improve sealing performance when the door is closed. The transparent panels 405 are made of transparent acrylic; the cuboid frame 403 is typically made of stainless steel; and the sealing strips are typically made of silicone. Generally, the transparent panels 405 are detachably installed on the cuboid frame 403 using clips, allowing for quick disassembly and maintenance when needed.

[0028] The turnover hopper 7 includes a turnover cart 701 and a turnover frame 702. The turnover frame 702 has a placement space for the turnover cart 701 to pass through. The turnover cart 701 has a holding cavity with an upward opening. The turnover cart 701 is located in the placement space of the turnover frame 702, and the opening of the holding cavity is connected to the discharge port of the vacuum conveyor 6. In this way, the vacuum conveyor 6 transports powder materials from the receiving container 3 used to receive qualified products to the turnover cart 701. When the turnover cart 701 is full, the worker can directly push the turnover cart 701 away and replace it with a new one, which is convenient for transfer and can effectively ensure safety. Typically, the turnover cart 701 is equipped with a pusher.

[0029] The turnover frame 702 includes a top plate and two side plates. The upper edges of the two side plates are connected to the left and right edges of the top plate, respectively. The top plate and the two side plates form a through-hole. The top plate has a third through hole. The turnover hopper 7 also includes a telescopic connecting pipe 703, a turnover cart cover 704, and a lifting drive device that can drive the turnover cart cover 704 to rise and fall. The lifting drive device is installed on the top plate. The turnover cart cover 704 matches the opening shape of the turnover cart 701. The turnover cart cover 704 has a fourth through hole that matches the lower opening of the telescopic connecting pipe 703. The upper end of the telescopic connecting pipe 703 is connected to the discharge port of the vacuum lifting machine 6. The lower end of the telescopic connecting pipe 703 passes through the third through hole and is connected to the edge of the fourth through hole. When the trolley 701 enters the placement space to be filled with material, the lifting drive device drives the trolley cover 704 to descend and cover the opening of the trolley 701. At this time, the telescopic connecting pipe 703 is stretched. After the vacuum feeder 6 extracts the powder material from the corresponding receiving container 3, it can directly enter the trolley 701 through the fourth through hole via the telescopic connecting pipe 703. During this process, the opening of the trolley 701 is sealed, and there will be no overflow or scattering of material. Therefore, in conjunction with the sealing shell 4, the entire material conveying process can be dust-free, solving the dust pollution problem of traditional equipment. The telescopic connecting pipe 703 is generally made of telescopic PVC hose (such as PVC steel wire hose).

[0030] The turnover hopper 7 also includes a weighing platform 705, which is located at the bottom of the placement space. The turnover cart 701 is situated within the placement space of the turnover frame 702 and rests on the weighing platform 705. The weighing platform 705 can be a platform scale, typically buried in the ground with its upper surface flush with the ground. When the turnover cart 701 is in the placement space, as powder material enters it, the platform scale weighs the cart. When the weight of the turnover cart 701 reaches a preset weight, an alarm or other notification can be used to notify workers to remove and replace the cart.

[0031] The transfer cart 701 has multiple wheels 7011 at its bottom, and a material outlet 7012 at the bottom of the holding chamber. The lower part of the holding chamber is funnel-shaped. The valve is a DN50-PP ball valve.

[0032] The turnover cart 701 is equipped with an electromagnetic vibrator, which can drive the vibration of the holding chamber and the powder material inside. The electromagnetic vibrator can prevent the material from agglomerating and blocking the material outlet.

Claims

1. A closed-type automatic powder material conveying device, comprising a vibrating screen, at least two receiving containers, a vacuum conveyor, and a transfer silo, wherein the inlet of each receiving container corresponds to the outlet of the vibrating screen, the inlet of the vacuum conveyor is connected to the outlet of the receiving container for receiving qualified products, and the outlet of the vacuum conveyor is connected to the inlet of the transfer silo; characterized in that: It also includes a sealed housing, a first conveying pipe and a second conveying pipe. The vibrating screen and each receiving container are located inside the sealed housing. The sealed housing is provided with a first through hole and a second through hole. The first conveying pipe passes through the first through hole, and the discharge end of the first conveying pipe is connected to the feed inlet of the vibrating screen. The feed end of the first conveying pipe is located outside the sealed housing. The second conveying pipe passes through the second through hole, and the discharge port of the receiving container used to receive qualified products and the feed inlet of the vacuum feeder are respectively connected to the two ends of the second conveying pipe.

2. The closed-type automatic powder material conveying device as described in claim 1, characterized in that: The enclosed automatic powder material conveying device also includes a dust concentration sensor and a dust removal device. The dust concentration sensor is located inside the sealed housing, and the exhaust port of the dust removal device is connected to the inside of the sealed housing.

3. The closed-type automatic powder material conveying device as described in claim 2, characterized in that: The dust concentration sensor is located at the top inside the sealed housing.

4. The enclosed automatic powder material conveying device as described in claim 1, characterized in that: The sealed housing includes a cuboid frame, a safety door, and multiple transparent panels. The safety door is openable and closable on one side of the cuboid frame, and the edge of the safety door is provided with a sealing strip. Each transparent panel is installed on the other sides of the cuboid frame and is sealed.

5. The closed-type automatic powder material conveying device as described in claim 1, characterized in that: The turnover hopper includes a turnover trolley and a turnover frame. The turnover frame has a placement space for the turnover trolley to pass through. The turnover trolley has a holding cavity with an opening facing upwards. The turnover trolley is placed in the placement space of the turnover frame, and the opening of the holding cavity is connected to the discharge port of the vacuum lifting machine.

6. The enclosed automatic powder material conveying device as described in claim 5, characterized in that: The turnover frame includes a top plate and two side plates. The upper edges of the two side plates are connected to the left and right edges of the top plate, respectively. The top plate and the two side plates form a through-hole. The top plate has a third through hole. The turnover hopper also includes a telescopic connecting pipe, a turnover trolley cover, and a lifting drive device that can drive the turnover trolley cover to rise and fall. The lifting drive device is installed on the top plate. The turnover trolley cover matches the opening shape of the turnover trolley. The turnover trolley cover has a fourth through hole that matches the lower opening of the telescopic connecting pipe. The upper end of the telescopic connecting pipe is connected to the discharge port of the vacuum lifting machine. The lower end of the telescopic connecting pipe passes through the third through hole and is connected to the edge of the fourth through hole.

7. The closed-type automatic powder material conveying device as described in claim 5, characterized in that: The turnover silo also includes a weighing platform, which is located at the bottom of the placement space. The turnover cart is located in the placement space of the turnover frame and is placed on the weighing platform.

8. The closed-type automatic powder material conveying device as described in claim 5, characterized in that: The turnover vehicle is equipped with multiple wheels at the bottom, and a material outlet is located at the bottom of the holding chamber, with a valve at the material outlet.

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