Negative pressure pneumatic conveying ton bag feeding station

Abstract

This utility model discloses a negative pressure pneumatic conveying ton bag feeding station, belonging to the field of graphite negative electrode powder material conveying technology. The feeding station includes a ton bag buffer silo, a negative pressure conveying system pipeline, and dust removal equipment. The negative pressure conveying system pipeline is connected to the ton bag buffer silo. The dust removal equipment includes a dust removal ring pipe surrounding the upper outer side of the ton bag buffer silo. At least two dust removal connecting pipes are symmetrically arranged in a spoke-like pattern between the ton bag buffer silo and the dust removal ring pipe, connecting the ton bag buffer silo and the dust removal ring pipe. The dust removal connecting pipes are inclined upwards relative to the side wall of the ton bag buffer silo. The dust removal ring pipe is connected to the negative pressure conveying system pipeline via a pipe, providing suction for the dust removal ring pipe to adsorb dust. This solution simplifies the structure of the dust removal equipment used in the ton bag buffer silo. Furthermore, the design of the connection method between the ton bag buffer silo and the dust removal ring pipe not only improves the uniformity of dust removal but also effectively prevents powder from clogging the dust removal connecting pipe.

Description

Technical Field

[0001] This utility model relates to the field of graphite negative electrode powder material conveying technology, and more specifically, to a negative pressure pneumatic conveying ton bag feeding station. Background Technology

[0002] In the lithium battery industry, the process of feeding graphite powder into ton bags is the core link in generating dust pollution. Graphite powder has characteristics such as small particle size, low density, high conductivity, and hydrophobicity, making it extremely easy to generate dust during unpacking and feeding.

[0003] To address the dust problem during ton bag feeding, existing technologies typically replace the pneumatic conveying system used in the ton bag feeding process with negative pressure pneumatic conveying, thereby reducing dust spillage to some extent. For example, Chinese patent application CN217675706 U discloses a graphite negative electrode powder feeding device, which includes a support frame with an electric hoist mounted on top. The electric hoist suspends the ton bag via a ton bag hanger. A transition hopper, a bucket-shaped material cylinder with openings at both ends, is located at the bottom of the support frame. Above the upper opening of the transition hopper is a bag-removing device, and above that is a striking device consisting of a drive cylinder and striking components. A feeding device is connected to the lower opening of the transition hopper, which also features a top-and-bottom design. A dust removal system is also located on one side of the transition hopper, connected to both the transition hopper and the feeding device. The dust removal system includes a micro-pulse bag filter and a fan.

[0004] Although the dust removal system used in the existing graphite anode material ton bag feeding station can effectively reduce dust overflow, the dust removal equipment used is relatively complex and the dust collection effect needs to be further improved. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] To address the technical issues of relatively complex structures and insufficient dust collection efficiency in existing negative pressure pneumatic conveying ton bag feeding stations, this invention provides a negative pressure pneumatic conveying ton bag feeding station. This solution simplifies the structure of the dust collection equipment used in the ton bag buffer silo by connecting the dust collection equipment to the negative pressure conveying system pipeline. Furthermore, the design of the connection method between the ton bag buffer silo and the dust collection ring pipe not only improves the uniformity of dust collection but also effectively prevents powder from clogging the dust collection connection pipe.

[0007] 2. Technical solutions adopted

[0008] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0009] This utility model provides a negative pressure pneumatic conveying ton bag feeding station, which includes a ton bag buffer silo, a negative pressure conveying system pipeline, and dust removal equipment. The negative pressure conveying system pipeline is connected to the ton bag buffer silo to provide conveying power for the materials in the ton bag buffer silo. The dust removal equipment includes a dust removal ring pipe and at least two dust removal connecting pipes. The dust removal ring pipe is arranged around the outer side of the upper part of the ton bag buffer silo, and the at least two dust removal connecting pipes are symmetrically arranged in a spoke-like pattern between the ton bag buffer silo and the dust removal ring pipe to connect the ton bag buffer silo and the dust removal ring pipe. The dust removal connecting pipes are inclined upwards relative to the side wall of the ton bag buffer silo. The dust removal ring pipe is connected to the negative pressure conveying system pipeline through a pipe, and the negative pressure conveying system pipeline provides suction for the dust removal ring pipe to adsorb dust.

[0010] Furthermore, the angle between the dust removal connecting pipe and the horizontal direction is 20~30°.

[0011] Furthermore, the outlet of the dust removal ring pipe is connected to one end of the dust removal hose, and the other end of the dust removal hose is connected to the negative pressure conveying system pipeline through a pipe.

[0012] Furthermore, the side wall of the ton bag buffer compartment is provided with a dust suction port, and the height between the dust suction port and the top of the ton bag buffer compartment is 200~400mm.

[0013] Furthermore, the top of the ton bag buffer hopper is provided with at least one feeding port, and each feeding port is provided with a corresponding ton bag feeding hopper, which is funnel-shaped and used to guide the material flow. Above each ton bag feeding hopper is a corresponding crane for lifting the ton bag.

[0014] Furthermore, the number of feeding ports is two or more.

[0015] Furthermore, the negative pressure conveying system pipeline includes a negative pressure main pipeline and a dust collection branch pipeline. The negative pressure main pipeline is connected to the discharge section of the ton bag buffer silo via a pipeline. The dust collection branch pipeline in the negative pressure conveying system pipeline is connected to the outlet of the dust removal ring pipe via a pipeline. Along the gas flow direction, the negative pressure main pipeline is sequentially provided with a first inlet connected to the dust collection branch pipeline and a second inlet connected to the bottom end of the ton bag buffer silo.

[0016] Furthermore, the negative pressure main pipeline is equipped with a negative pressure delivery pipe regulating valve for adjusting the airflow therein, and the dust extraction branch pipeline is equipped with a dust removal regulating valve for adjusting the airflow therein.

[0017] Furthermore, the air inlet of the negative pressure main pipeline is equipped with an exhaler.

[0018] Furthermore, a slide gate valve and a discharge rotary valve are sequentially installed in the pipeline between the ton bag buffer silo and the second inlet of the negative pressure main pipeline along the airflow direction.

[0019] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0020] (1) This utility model optimizes the design of the negative pressure pneumatic conveying ton bag feeding station. Specifically, the dust removal ring pipe is connected to the negative pressure conveying system pipeline through a pipe, providing suction for the dust removal ring pipe to suck up dust, thereby eliminating the need for the existing dust removal equipment, such as the fan, dust removal bin, filter bag, pulse jet cleaning, and control box that electrically connects the above structures. At the same time, traditional dust removal equipment is generally set on the top or top side of the ton bag buffer bin. By simplifying the dust removal equipment, space is freed up at the top of the ton bag buffer bin, providing a basis for the efficient use of the top space of the ton bag buffer bin.

[0021] (2) The present invention further optimizes the connection method between the ton bag buffer silo and the dust removal connecting pipe. Specifically, at least two dust removal connecting pipes are symmetrically arranged in a spoke-like shape between the ton bag buffer silo and the dust removal ring pipe, and the dust removal connecting pipes are inclined upward relative to the side wall of the ton bag buffer silo. On the one hand, at least two dust suction ports are formed on it along the circumference of the ton bag buffer silo, thereby improving the uniformity of dust adsorption inside it, especially suitable for ton bag feeding stations with multiple feeding ports on the top of the ton bag buffer silo. On the other hand, by setting the dust removal connecting pipes inclined upward, when the dust removal ring pipe stops dust suction, the material particles inside the dust removal connecting pipe fall back into the ton bag buffer silo under the influence of gravity, thereby preventing the material particles from clogging the dust removal connecting pipes. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the negative pressure pneumatic conveying ton bag feeding station in an embodiment of this utility model.

[0023] Figure 2 This is a top view of the buffer silo in the negative pressure pneumatic conveying ton bag feeding station in this embodiment of the present invention.

[0024] Label Explanation:

[0025] 1. Exhaler;

[0026] 2. Negative pressure delivery pipe regulating valve;

[0027] 3. Dust removal regulating valve;

[0028] 4. Dust collection hose;

[0029] 5. Pneumatic hammer;

[0030] 6. Dust collector ring pipe; 601. Dust collector connecting pipe;

[0031] 7. Electric hoist;

[0032] 8. Ton bags;

[0033] 9. Ton bag feeding hopper;

[0034] 10. Ton bag buffer silo; 1001. Feeding port;

[0035] 11. Slide valve;

[0036] 12. Discharge rotary valve;

[0037] 13. Negative pressure delivery system pipeline. Detailed Implementation

[0038] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0039] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0040] This embodiment provides a negative pressure pneumatic conveying ton bag feeding station, see reference. Figure 1 As shown, the feeding station includes a ton bag buffer silo 10, a negative pressure conveying system pipeline 13, and a dust removal device. The negative pressure conveying system pipeline 13 is connected to the ton bag buffer silo 10, providing conveying power to the materials in the ton bag buffer silo 10. The dust removal device includes a dust removal ring pipe 6 and at least two dust removal connecting pipes 601. The dust removal ring pipe 6 is arranged around the outer side of the upper part of the ton bag buffer silo 10, and the at least two dust removal connecting pipes 601 are symmetrically arranged in a spoke-like pattern between the ton bag buffer silo 10 and the dust removal ring pipe 6, for connecting the ton bag buffer silo 10 and the dust removal ring pipe 6. The dust removal connecting pipes 601 are inclined upward relative to the side wall of the ton bag buffer silo 10. The dust removal ring pipe 6 is connected to the negative pressure conveying system pipeline 13 through a pipe, and the negative pressure conveying system pipeline 13 provides suction for the dust removal ring pipe 6 to adsorb dust.

[0041] In the existing graphite powder conveying process, the negative pressure conveying system pipeline 13 is connected to the ton bag buffer silo 10 to provide power for conveying the graphite powder falling through the ton bag buffer silo 10. This new embodiment connects the dust collection ring pipe 6 in the dust removal equipment to the negative pressure conveying system pipeline 13, providing suction for the dust collection ring pipe 6 to draw in dust. This eliminates the need for the existing dust removal equipment, which includes a fan, dust collection silo, filter bags, pulse jet cleaning, and the control box that electrically connects to these components. Furthermore, traditional dust removal equipment is typically located at the top or top side of the ton bag buffer silo. By simplifying the dust removal equipment, space is freed up at the top of the ton bag buffer silo 10, providing a basis for the efficient utilization of this space. In addition, by designing the number and angle of the dust collection connecting pipes 601, at least two dust suction ports are formed along the circumference of the ton bag buffer silo 10, thereby improving the uniformity of dust removal inside the ton bag buffer silo 10. This is particularly suitable for ton bag feeding stations with multiple feeding ports at the top of the ton bag buffer silo.

[0042] By tilting the dust removal connecting pipe 601 upwards, and connecting both ends of the dust removal connecting pipe 601 to the ton bag buffer 10 and the dust removal ring pipe 6 respectively, when the dust removal ring pipe 6 stops suctioning, the material particles inside the dust removal connecting pipe fall back into the ton bag buffer 10 under the influence of gravity, thereby preventing the material particles from clogging the dust removal connecting pipe.

[0043] It should also be noted that a small amount of graphite powder inside the ton bag buffer silo 10, that is, graphite powder in the form of small particulate dust, enters the dust removal connecting pipe 601 from the outlet of the ton bag buffer silo 10 corresponding to the dust removal connecting pipe 601, and then enters the negative pressure conveying system pipeline 13 through the dust removal ring pipe 6. Here, it merges with the dust falling through the buffer 10, thereby realizing the immediate recycling of the dust obtained from dust removal, thereby reducing the subsequent processing steps of the dust obtained from traditional dust removal.

[0044] The dust removal ring pipe 6 is made of stainless steel, with S30408 ​​being the preferred material grade.

[0045] Preferably, the angle between the dust removal connecting pipe 601 and the horizontal direction is 20~30°, and more preferably 30°.

[0046] In a further preferred embodiment, the outlet of the dust removal ring pipe 6 is connected to one end of the dust removal hose 4, and the other end of the dust removal hose 4 is connected to the negative pressure conveying system pipeline 13 through a pipe. The dust removal hose 4 has an internal steel wire hose embedded inside to reduce material blockage.

[0047] In some embodiments, the side wall of the ton bag buffer hopper 10 is provided with a dust suction port corresponding to the dust removal connection pipe 601. The height between the dust suction port and the top of the ton bag buffer hopper 10 is 200~400mm. This is close to the material drop point inside the ton bag buffer hopper 10, which helps to improve the dust removal effect of the dust removal connection pipe 601.

[0048] It should be noted that the feeding port of the ton bag buffer silo 10 is generally located at its top, and the feeding port is usually equipped with a corresponding funnel-like ton bag feeding hopper to facilitate the powder in the ton bag 8 falling into the interior of the ton bag buffer silo 10. During use, the discharge port of the ton bag 8 is inserted into the interior of the ton bag feeding hopper. In addition, the interior of the ton bag buffer silo 10 is a negative pressure air passage, so relatively little dust escapes from the ton bag feeding hopper into the external environment. Therefore, the dust suction port of the ton bag buffer silo 10 is located on its side wall.

[0049] As an extension option, refer to Figure 2 As shown, the top of the ton bag buffer bin 10 is provided with at least one feeding port 1001. Each feeding port 1001 is provided with a corresponding ton bag feeding hopper 9, which is funnel-shaped. The small port of the ton bag feeding hopper 9 is inserted into the corresponding feeding port 1001 to guide the material falling in. A crane for lifting the ton bag 8 is provided directly above each ton bag feeding hopper 9.

[0050] As a further expansion option, the number of feeding ports 1001 is two or more. Two or more feeding ports 1001 are evenly distributed around the top of the ton bag buffer silo 10 along its axis. Through optimization of the dust removal equipment, new space can be freed up at the top of the ton bag buffer silo 10, thus facilitating the opening of more feeding ports 1001, and allowing more ton bags 8 to simultaneously feed into a single ton bag buffer silo 10. The ton bag buffer silo 10 is particularly suitable for specifications with a capacity of 25m³ or more.

[0051] The number of dust removal connecting pipes 601 is preferably set to two, three, or four. The number of dust removal connecting pipes 601 is mainly determined by the dust removal air volume requirement and the number of feeding ports 1001 located at the top of the ton bag buffer silo 10. Preferably, the number of dust removal connecting pipes 601 is the same as the number of feeding ports 1001, and multiple feeding ports 1001 are evenly distributed on the ton bag buffer silo 10. The dust removal connecting pipes 601 are evenly distributed on the outer side of the ton bag buffer silo 10 along the circumferential direction.

[0052] In other embodiments, the crane is an electric hoist 7, the specifications of which are determined according to the specifications of the ton bag 8. The ton bag 8 is hung upside down on the electric hoist 7 with its discharge port facing downwards. After the ton bag 8 is unpacked, the graphite powder in the ton bag 8 falls into the ton bag buffer chamber 10 through the ton bag feeding hopper 9.

[0053] As a preferred embodiment of the negative pressure conveying system pipeline 13, the negative pressure conveying system pipeline 13 includes a negative pressure main pipeline and a dust collection branch pipeline. The negative pressure main pipeline is connected to the discharge section of the ton bag buffer silo 10 through a pipeline. The dust collection branch pipeline in the negative pressure conveying system pipeline 13 is connected to the outlet of the dust removal ring pipe 6 through a pipeline. Along the gas flow direction, the negative pressure main pipeline is provided with a first inlet connected to the dust collection branch pipeline and a second inlet connected to the bottom end of the ton bag buffer silo 10.

[0054] In a further preferred embodiment, the negative pressure main pipeline is equipped with a negative pressure conveying pipe regulating valve 2 for adjusting the airflow therein, and the dust collection branch pipeline is equipped with a dust removal regulating valve 3 for adjusting the airflow therein.

[0055] It should be noted that the opening degrees of the negative pressure conveying pipe regulating valve 2 and the dust removal regulating valve 3 are negatively correlated. When the air flow rate in the pipeline where the negative pressure conveying pipe regulating valve 2 is located increases, the air flow rate in the pipeline where the dust removal regulating valve 3 is located decreases accordingly. This linkage can be manually controlled. To facilitate adjustment of their opening degrees, the negative pressure conveying pipe regulating valve 2 and the dust removal regulating valve 3 are selected as regulating valves of the same specification, and the pipe diameters of the pipelines where they are located are the same. By controlling the opening degree of the dust removal regulating valve 5, the air flow rate inside the dust collection branch pipeline is controlled, thereby controlling the dust removal effect.

[0056] More preferably, the air inlet of the negative pressure main pipeline is equipped with an exhaler 1. The exhaler 1 is used to draw in external air into the negative pressure main pipeline and filter out some of the particles and impurities in the air.

[0057] As a further preferred embodiment of any of the above embodiments, a slide gate valve 11 and a discharge rotary valve 12 are sequentially provided in the pipeline between the ton bag buffer silo 10 and the second inlet of the negative pressure main pipeline along the airflow direction. The slide gate valve 11 is used to control the discharge speed of the ton bag buffer silo 10.

[0058] The upper part of the ton bag buffer 10 is cylindrical, and the lower part is conical. The air hammer 5 is installed in the lower part of the ton bag buffer 10 to prevent bridging and blockage of materials in the lower part of the ton bag buffer 10.

[0059] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A negative pressure pneumatic conveying ton bag feeding station, the feeding station comprising a ton bag buffer silo (10), a negative pressure conveying system pipeline (13), and dust removal equipment, wherein, The negative pressure conveying system pipeline (13) is connected to the ton bag buffer silo (10) and is used to provide conveying power for the materials in the ton bag buffer silo (10); characterized in that, The dust removal equipment includes a dust removal ring pipe (6) and at least two dust removal connecting pipes (601). The dust removal ring pipe (6) is arranged around the upper outer side of the ton bag buffer silo (10). The at least two dust removal connecting pipes (601) are symmetrically arranged in a spoke-like manner between the ton bag buffer silo (10) and the dust removal ring pipe (6) to connect the ton bag buffer silo (10) and the dust removal ring pipe (6). The dust removal connection pipe (601) is inclined upward relative to the side wall of the ton bag buffer silo (10); The dust removal ring pipe (6) is connected to the negative pressure conveying system pipeline (13) through a pipe, and the negative pressure conveying system pipeline (13) provides suction for the dust removal ring pipe (6) to adsorb dust.

2. The negative pressure pneumatic conveying ton bag feeding station according to claim 1, characterized in that, The angle between the dust removal connecting pipe (601) and the horizontal direction is 20~30°.

3. The negative pressure pneumatic conveying ton bag feeding station according to claim 1, characterized in that, The outlet of the dust removal ring pipe (6) is connected to one end of the dust removal hose (4), and the other end of the dust removal hose (4) is connected to the negative pressure conveying system pipeline (13) through a pipe.

4. The negative pressure pneumatic conveying ton bag feeding station according to any one of claims 1-3, characterized in that, The side wall of the ton bag buffer chamber (10) is provided with a dust suction port, and the height between the dust suction port and the top of the ton bag buffer chamber (10) is 200~400mm.

5. The negative pressure pneumatic conveying ton bag feeding station according to claim 4, characterized in that, The top of the ton bag buffer silo (10) is provided with at least one feeding port (1001), and each feeding port (1001) is provided with a corresponding ton bag feeding hopper (9), which is funnel-shaped and used to guide the material. A crane for lifting the ton bag (8) is provided directly above each ton bag feeding hopper (9).

6. The negative pressure pneumatic conveying ton bag feeding station according to claim 5, characterized in that, The number of feeding ports (1001) is two or more.

7. The negative pressure pneumatic conveying ton bag feeding station according to any one of claims 1-3, characterized in that, The negative pressure conveying system pipeline (13) includes a negative pressure main pipeline and a dust suction branch pipeline. The negative pressure main pipeline is connected to the discharge section of the ton bag buffer silo (10) through a pipeline. The dust suction branch pipeline in the negative pressure conveying system pipeline (13) is connected to the outlet of the dust removal ring pipe (6) through a pipeline. Along the gas flow direction, the negative pressure main pipeline is provided with a first inlet connected to the dust suction branch pipeline and a second inlet connected to the bottom end of the ton bag buffer silo (10).

8. The negative pressure pneumatic conveying ton bag feeding station according to claim 7, characterized in that, The negative pressure main pipeline is equipped with a negative pressure conveying pipe regulating valve (2) for adjusting the airflow therein, and the dust suction branch pipeline is equipped with a dust removal regulating valve (3) for adjusting the airflow therein.

9. The negative pressure pneumatic conveying ton bag feeding station according to claim 8, characterized in that, The air inlet of the negative pressure main pipeline is equipped with an exhaler (1).

10. The negative pressure pneumatic conveying ton bag feeding station according to claim 7, characterized in that, The pipeline between the ton bag buffer silo (10) and the second inlet of the negative pressure main pipeline is also provided with a slide gate valve (11) and a discharge rotary valve (12) in sequence along the airflow direction.

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