Stock bin suitable for bowl loading system

Abstract

The utility model discloses a stock bin suitable for a bowl loading system, which comprises a stock bin body comprising a conical section and a cylindrical section which are connected in sequence, and the bottom of the cylindrical section is provided with a discharge port; the cylindrical filter element is arranged in the inner cavity of the cylindrical section; wherein an exhaust through hole is formed in the side wall of the cylindrical section, the exhaust through hole is connected with a negative pressure system, and the negative pressure system is used for removing gas in the stock bin after the gas is filtered by the cylindrical filter element. The exhaust through hole of the stock bin is connected with the negative pressure system, and the negative pressure system continuously provides a negative pressure environment for the interior of the stock bin through the exhaust through hole, so that gas in the stock bin is exhausted from the degassing pipeline; meanwhile, the cylindrical filter element can effectively prevent dust from escaping from the exhaust through hole and entering a negative pressure system.

Description

Technical Field

[0001] The utility model relates to the technical field of material conveying, and more specifically, to a material bin suitable for a potting system. Background Art

[0002] In the preparation process of the positive electrode material of nickel-cobalt-manganese ternary lithium-ion battery, the precursor and lithium salt are first mixed evenly by a mixer to form a mixture, which is then sent into the sagger through the filling system and then into the kiln for sintering. Due to the loose nature of the mixed material, scattering, dust and inaccurate metering are prone to occur during the filling process. From the perspective of capacity improvement and energy efficiency, there is a lot of gas between the particles of the loose mixed material, which reduces the available space of the mixed material in the sagger and leads to a reduction in the actual filling amount; from the perspective of equipment maintenance, dust enters the moving parts, causing the moving parts to be contaminated by dust and shortening their service life, affecting the stable operation of the production line equipment and increasing maintenance costs.

[0003] Therefore, how to improve the situation where loose mixed materials lead to low filling pot utilization and inaccurate metering accuracy, and reduce the adverse effects of dust on equipment components, is the key to achieving cost reduction and efficiency improvement in the ternary positive electrode material manufacturing industry. Utility Model Content

[0004] The utility model aims to provide a material bin suitable for a potting system, which can improve the low potting utilization rate and inaccurate metering accuracy caused by loose mixed materials.

[0005] The utility model provides a silo suitable for a potting system, comprising:

[0006] The silo body comprises a conical section and a cylindrical section connected in sequence, and a discharge port is provided at the bottom of the cylindrical section;

[0007] The cylindrical filter element is arranged in the inner cavity of the cylindrical section; wherein, an exhaust through hole is opened on the side wall of the cylindrical section, and the exhaust through hole is connected to a negative pressure system, and the negative pressure system is used to filter the gas in the silo through the cylindrical filter element and then escape.

[0008] Optionally, the silo further comprises a rotating shaft, which is coaxially arranged in the silo and extends from the conical section to the cylindrical section;

[0009] The portion of the rotating shaft corresponding to the cylindrical section is provided with spiral blades; and / or, a filter screen is provided at the discharge port.

[0010] Optionally, the cylindrical filter element is a titanium filter element, and the pore size of the titanium filter element is 0.5 μm-1.5 μm;

[0011] And / or, the filter screen is a stainless steel filter screen, and the pore size of the stainless steel filter screen is 0.5cm-1.5cm.

[0012] Optionally, the side wall of the cylindrical section is further provided with an air intake hole, which is connected to an external high-pressure air source.

[0013] Optionally, the negative pressure system includes a pressure detection device, a pressure relief device and a degassing device arranged in sequence along the degassing gas path;

[0014] The degassing device is connected to the exhaust through hole through the degassing pipeline to provide negative pressure in the silo body;

[0015] The pressure relief device comprises a plurality of pressure relief air filter elements which are arranged in parallel on the degassing pipeline, and an air pressure balance valve is arranged between any pressure relief air filter element and the degassing pipeline.

[0016] Optionally, a degassing filter element is further provided on the degassing pipeline, and the degassing filter element is arranged on the degassing pipeline between the pressure relief device and the degassing device.

[0017] Optionally, the degassing filter element comprises a primary degassing filter element and a secondary degassing filter element which are sequentially arranged in series along the degassing gas path.

[0018] Optionally, the degassing device comprises a vacuum pump connected to the gas outlet end of the degassing pipeline, and a pump head filter element is provided at the gas inlet end of the vacuum pump.

[0019] Optionally, the high-pressure gas source is a gas storage tank, and a filter is provided on the air inlet pipeline of the gas storage tank.

[0020] Optionally, the discharge port is connected to a dust collecting hood.

[0021] According to the technical content disclosed in the utility model, the following beneficial effects are achieved:

[0022] The utility model provides a silo suitable for a filling system, wherein an exhaust through hole is opened on the outer periphery of a cylindrical section of a silo body; the exhaust through hole is connected to a negative pressure system; when the silo is fed, the negative pressure system continuously provides a negative pressure environment for the silo body through the exhaust through hole, so that the gas in the silo body is discharged from the negative pressure system; the cylindrical filter element can effectively prevent dust from escaping from the exhaust through hole and entering the negative pressure system.

[0023] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0025] Figure 1 This is a structural diagram of a silo suitable for a potting system of the utility model.

[0026] Explanation of the reference numerals in the accompanying drawings: 1. first drive motor; 2. conical section; 3. stirring device; 4. dust collecting hood; 5. rotating shaft; 6. titanium filter element; 7. cylindrical section; 8. filter screen; 9. sagger; 10. pressure relief air filter element; 11. air pressure balance valve; 12. primary filter element; 13. pump head filter element; 14. vacuum pump; 15. second drive motor; 16. filter; 17. air storage tank; 18. solenoid valve; 19. secondary filter element; 20. pressure gauge; 21. spiral pushing device. DETAILED DESCRIPTION

[0027] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0028] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0029] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0030] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0031] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0032] In view of the deficiencies in the above-mentioned background technology, the present invention proposes to add a micron-grade titanium filter element 6 (about 1 μm) and a stainless steel filter screen (about 1 cm, the aperture size of the filter screen 8 is related to the degassing effect. If the aperture of the filter screen 8 is too large, the material will be discharged too quickly, affecting the metering accuracy. If the filter screen 8 is too small, it will be easily clogged). The degassing treatment of the mixed material is achieved through the degassing system of the degassing system, which solves the problem of low filling volume caused by the excessive looseness of the mixed material under the existing technology. In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0033] See also Figure 1 The utility model discloses a silo suitable for a sagger system, comprising: a first drive motor 1, a sagger 9, a silo body, a rotating shaft 5, a cylindrical filter element, a filter screen 8, a negative pressure system and a back-blowing system;

[0034] The silo body is used to store and transport powders, and includes a conical section 2 and a cylindrical section 7 connected in sequence from top to bottom. An air intake hole and an exhaust hole are relatively opened on the outer periphery of the middle part of the cylindrical section 7. A trumpet-shaped dust hood 4 is connected to the bottom of the cylindrical section 7. The dust hood 4 is a stainless steel dust hood that can prevent dust from flying during the unloading process.

[0035] The rotating shaft 5 is concentrically arranged in the silo body and passes through the conical section 2 and the cylindrical section 7 in sequence; the outer circumference of the rotating shaft 5 is sequentially provided with a stirring device 3 and a spiral pushing device 21 from top to bottom, the stirring device 3 is located at the lower part of the conical section 2, and the spiral pushing device 21 is located at the cylindrical section 7, specifically, the part of the rotating shaft 5 located at the cylindrical section 7 is provided with a spiral blade for pushing the material forward; the first driving motor 1 is arranged above the conical section 2, and the output shaft of the first driving motor 1 is connected to the rotating shaft 5 to drive the rotating shaft 5 to rotate around the axis, thereby driving the stirring device 3 to stir in the conical section 2 to prevent the mixed material from bridging in the conical section 2, and synchronously driving the spiral pushing device 21 to rotate around the axis to slowly push the material downward in the cylindrical section.

[0036] There are no seals on the top and bottom of the cylindrical filter element, and the top of the cylindrical filter element is connected to the upper end of the cylindrical section 7 by a positioning pin; the cylindrical filter element is specifically a micron-grade titanium filter element 6, and the titanium filter element 6 is located between the spiral pushing device 21 and the cylindrical section 7; the titanium filter element 6 has a height of 40 cm, a diameter of 20 cm, and a pore size of 0.5μm-1.5μm, preferably a cylindrical titanium filter element 6 of 1μm. The material of the cylindrical filter element is titanium, which has good corrosion resistance.

[0037] The filter screen 8 is a stainless steel filter screen, and the pore size of the stainless steel filter screen is 0.5 cm-1.5 cm, preferably 1 cm. The stainless steel filter screen is arranged at the bottom of the cylindrical section 7, and both play the role of slowing down the feeding speed of the mixed material together with the spiral pushing device 21.

[0038] The negative pressure system includes a degassing device and a pressure relief device. The degassing device is a vacuum pump 14. The air inlet end of the vacuum pump 14 is connected to the exhaust through hole on the cylindrical section 7. The vacuum pump 14 operates continuously to extract the gas inside the cylindrical section 7. The pressure relief device includes an air pressure balance valve 11 and a pressure relief air filter element 10. Specifically, the negative pressure system includes an air pressure balance valve 11, a pressure relief air filter element 10, a degassing pipeline, a degassing filter element, a pump head filter element 13, a vacuum pump 14 and a second drive motor 15. The second driving motor 15 drives the vacuum pump 14 to operate, and the vacuum pump 14 is connected to the exhaust through hole through the degassing pipeline to provide negative pressure inside the silo body; the negative pressure system also includes a pressure relief pipeline and a pressure detection device; the pressure detection device is a pressure gauge 20, one end of the pressure relief pipeline is connected to the degassing pipeline, and the other end is connected to the air pressure balance valve 11, and the air outlet end of the air pressure balance valve 11 is connected to the pressure relief air filter element 10; the air pressure balance valve 11 is used to control the delivery and discharge of the degassing pipeline and the system pressure, and the pressure relief air filter element 10 is used to filter the air inside the system; the pressure balance valve 11 has a plurality of The working principle of the system is as follows: when the negative pressure system works normally, the second drive motor 15 drives the vacuum pump 14 to generate pressure to suck the dust inside the cylindrical section 7, the titanium filter element 6 effectively intercepts the material, and the gas inside the cylindrical section 7 is extracted, meeting the requirements of only exhausting the air without leaking the powder and without clogging; when the negative pressure system works abnormally, the pressure gauge 20 detects that the pressure inside the system is too high and transmits the signal to the air pressure balance valve 11 and the solenoid valve 18. At this time, the air pressure balance valve 11 is opened by the impact of the air, and the air inside the system is discharged through the pressure relief air filter element 10 to maintain the air pressure balance of the system.

[0039] The degassing filter element includes a primary filter element 12 and a secondary filter element 19 which are connected in series with a pressure relief pipe along the degassing gas path of the degassing pipeline. The primary filter element 12 and the secondary filter element 19 are used for primary / secondary filtration of dust to make the gas purity higher. The pump head filter element 13 is connected to the upper end of the vacuum pump 14 to prevent unfiltered gas powder materials from entering the vacuum pump 14 and damaging the bearings of the second drive motor 15.

[0040] The back-blowing system is used to back-blow the material on the titanium filter element 6 to prevent the titanium filter element 6 from being blocked and to improve the material metering accuracy. It includes a gas tank 17 connected to the air inlet end of the back-blowing pipe to provide a high-pressure air source, and a solenoid valve 18 arranged between the gas tank 17 and the air inlet hole. The solenoid valve 18 is used to control the on-off of the air path between the gas tank 17 and the air inlet hole. The gas outlet end of the gas tank 17 is connected to the air inlet hole through a back-blowing pipe to blow air into the silo. A filter 16 for purifying air is arranged on the air inlet pipeline of the gas tank 17. The back-blowing system reversely purges the titanium filter element 6 through air pressure, thereby removing the mixture attached to the surface of the titanium filter element 6, wherein a solenoid valve 18 for controlling the gas delivery switch is arranged between the gas tank 17 and the cylindrical section 7.

[0041] The mixing material powder-gas separation loading and degassing system further comprises a material collection container, which is a sagger 9 located below the cylindrical section and facing the filter screen, and is a mullite sagger 9 used for loading the mixing material.

[0042] Working principle: the mixture enters the cylindrical section 7 from the conical section 2 through the stirring device 3, and is slowly loaded into the sagger 9 under the action of the spiral pushing device 21 and the stainless steel filter screen; when the degassing system is in operation, the second drive motor 15 drives the vacuum pump 14 to operate, and the gas inside the cylindrical section 7 mixture is extracted through the titanium filter element 6. The specific extraction process is as follows: the mixture gas passes through the titanium filter element 6, and passes through the air pressure balance valve 11 through the degassing pipeline. If the air pressure is too high, the air pressure balance valve 11 automatically opens to discharge the excess gas through the pressure relief air filter element 10 to maintain the steady-state balance of the air pressure inside the pipeline; then the mixture gas passes through the primary filter element 12 and the secondary filter element 19 again for double filtration, and finally the gas is discharged under the continuous operation of the vacuum pump 14. In a specific embodiment, the apertures of the primary filter element 12, the secondary filter element 19 and the pump head filter element can all be 0.5μm. When the synchronous back-blowing system is working, the compressed air enters the air storage tank 17 through the filter 16, and the air storage tank 17 intermittently back-blows the titanium filter element 6, so that the powder mixture adsorbed on the surface of the titanium filter element 6 is back-blown into the sagger 9, preventing the filter element from being blocked and improving the metering accuracy.

[0043] In summary, compared with the prior art, the silo suitable for the bowl loading system provided by the utility model adds a micron-grade titanium filter element 6 and a stainless steel filter screen respectively, so that the mixture can effectively improve the material density during the discharge process through the synergistic effect of the degassing device and the back-blowing system, expand the effective utilization rate of the sagger 9 materials, and then increase the loading volume and production capacity. The mixing volume per unit sagger space is increased by 15%-25%, and the dust volume can also be reduced, which not only improves the batching accuracy but also maintains the stable operation of the equipment. By degassing the mixture, the fluidity of the mixture is effectively reduced, and the problem of dust leakage caused by strong fluidity during the bowl loading process and the problem of easy collapse of the material blocks during the cutting process are improved.

[0044] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A silo suitable for a potting system, characterized in that: include: The silo body comprises a conical section and a cylindrical section connected in sequence, and a discharge port is provided at the bottom of the cylindrical section; The cylindrical filter element is arranged in the inner cavity of the cylindrical section; wherein, an exhaust hole is opened on the side wall of the cylindrical section, and the exhaust hole is connected to a negative pressure system, and the negative pressure system is used to filter the gas in the silo through the cylindrical filter element and then escape.

2. The silo suitable for the potting system according to claim 1, characterized in that: The silo further includes a rotating shaft, which is coaxially disposed in the silo and extends from the conical section to the cylindrical section; The portion of the rotating shaft corresponding to the cylindrical section is provided with spiral blades; and / or, a filter screen is provided at the discharge port.

3. The silo suitable for the potting system according to claim 2, characterized in that: The cylindrical filter element is a titanium filter element, and the pore size of the titanium filter element is 0.5 μm-1.5 μm; And / or, the filter screen is a stainless steel filter screen, and the pore size of the stainless steel filter screen is 0.5cm-1.5cm.

4. A silo suitable for a bowl filling system according to any one of claims 1 to 3, characterized in that: The side wall of the cylindrical section is also provided with an air intake hole, which is connected to an external high-pressure air source.

5. The silo suitable for a potting system according to any one of claims 1 to 3, characterized in that: The negative pressure system comprises a pressure detection device, a pressure relief device and a degassing device arranged in sequence along the degassing gas path; The degassing device is connected to the exhaust through hole through a degassing pipeline to provide negative pressure in the silo body; The pressure relief device comprises a plurality of pressure relief air filter elements which are arranged in parallel on the degassing pipeline, and an air pressure balancing valve is arranged between any of the pressure relief air filter elements and the degassing pipeline.

6. The silo suitable for the potting system according to claim 5, characterized in that: The degassing pipeline is also provided with a degassing filter element, and the degassing filter element is arranged on the degassing pipeline between the pressure relief device and the degassing device.

7. The silo suitable for the potting system according to claim 6, characterized in that: The degassing filter element comprises a primary degassing filter element and a secondary degassing filter element which are sequentially arranged in series along the degassing gas path.

8. The silo suitable for a potting system according to claim 5, characterized in that: The degassing device comprises a vacuum pump connected to the gas outlet end of the degassing pipeline, and a pump head filter element is arranged at the gas inlet end of the vacuum pump.

9. The silo suitable for a potting system according to claim 4, characterized in that: The high-pressure gas source is a gas storage tank, and a filter is arranged on the air inlet pipeline of the gas storage tank.

10. The silo suitable for a potting system according to claim 2 or 3, characterized in that: The material discharge port is connected with a dust collecting hood.

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