Sorting mechanism for lead powder

Abstract

A sorting mechanism for lead powder belongs to the technical field of lead-acid battery production equipment and comprises a fan, a plurality of mesh screen sorting devices are arranged at the air inlet end of the fan, and a cyclone sorting device is arranged at the air outlet end of the fan. The consistency rate of lead powder sorting grades is increased, sorting is more thorough, and the collection rate of lead powder in lead powder air flow is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of lead-acid battery production equipment and relates to a sorting mechanism for lead powder. Background Art

[0002] Lead-acid batteries are mainly composed of positive plates, negative plates, bus bars, sulfuric acid, tank covers, etc.

[0003] The plate is composed of grid and lead paste. The main component of lead paste is lead powder. The properties of lead powder have a great influence on the performance of lead paste. If the lead powder particle size is too fine or too coarse, it will affect the performance of the battery.

[0004] The disadvantages of the prior art sorting equipment are as follows: the consistency of lead powder particle size sorting is difficult to ensure, and the lead powder air flow sorting and collection is not clean enough, causing some fine particles to be discharged with the air, resulting in waste. Utility Model Content

[0005] The purpose of the invention of the utility model is to provide a sorting mechanism for a lead powder ball mill in view of the above-mentioned problems existing in the prior art. The technical problems to be solved by the utility model are how to solve the consistency of lead powder sorting and how to solve the problem of improving the collection rate of lead powder in the lead powder air flow.

[0006] The invention object of the utility model can be achieved through the following technical scheme: a sorting mechanism for lead powder, the sorting mechanism comprises a fan, the air inlet end of the fan is provided with a plurality of mesh screen sorting devices, and the air outlet end of the fan is provided with a cyclone sorting device:

[0007] The mesh screen sorting device comprises a ventilation duct arranged at the discharge end of the ball mill, a plurality of drop ports arranged below the ventilation duct, a branch pipe is arranged below each drop port, and a collecting bucket is arranged below each branch pipe. Three supports are arranged on the inner wall of the ventilation duct and above the drop ports, each support is provided with a pin and a spring, and the working ends of the three springs are fixedly connected to a mesh screen plate.

[0008] The cyclone separation device includes a cylinder, which has a straight section and a tapered section. The outer wall of the straight section is provided with an air inlet pipe, the inner wall of the tapered section is provided with a spiral groove for spirally guiding the mixed air flow, the bottom of the tapered section is provided with a discharge valve, and the top of the discharge valve is provided with a tapered guide for airflow guidance. The top of the cylinder is provided with a cover plate, and the center of the cover plate is provided with a guide pipe for spirally guiding the airflow.

[0009] Furthermore, the sorting mechanism also includes a weak flow auxiliary device, which includes a snail-shaped shell arranged above the guide tube, a weak flow tube is provided on the top of the inner wall of the snail-shaped shell, the pipe mouth of the weak flow tube corresponds to the pipe mouth of the guide tube, and the snail-shaped shell is provided with an air outlet pipe.

[0010] Furthermore, conical slopes are provided on the inner walls on both sides close to the blanking opening for the lead powder to slide down.

[0011] Furthermore, the cross-sectional area of ​​the mesh plate is between 50% and 70% of the cross-sectional area of ​​the ventilation duct.

[0012] Furthermore, a support column is provided between the conical guide and the conical section for fixing and assembling the two.

[0013] Beneficial effects: Compared with the prior art, the utility model has the following advantages: the utility model improves the consistency of lead powder sorting grades by improving the arrangement of a mesh screen sorting device and a cyclone sorting device, makes the sorting more thorough, and improves the collection rate of lead powder in the lead powder air flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a partial cross-sectional schematic diagram of the utility model in the first viewing direction;

[0016] Figure 3 It is a partial cross-sectional schematic diagram of the utility model in the first viewing direction;

[0017] Figure 4 yes Figure 2 A partial enlarged view.

[0018] In the figure: 1. fan; 2. ventilation duct; 3. drop port; 4. branch pipe; 5. collection bucket; 6. spring; 7. mesh screen; 8. cylinder; 9. straight section; 10. conical section; 11. air inlet pipe; 12. spiral groove; 13. discharge valve; 14. conical guide; 15. cover plate; 16. guide pipe; 17. weak flow pipe; 18. air outlet pipe; 19. conical slope; the direction of the arrow is the direction of airflow. DETAILED DESCRIPTION

[0019] like Figure 1-4 As shown, the following is a specific embodiment of the utility model and combined with the accompanying drawings to further describe the technical solution of the utility model, but the utility model is not limited to these embodiments. A sorting mechanism for lead powder, the sorting mechanism includes a fan 1, the air inlet end of the fan 1 is provided with a plurality of mesh screen sorting devices, and the air outlet end of the fan 1 is provided with a cyclone sorting device:

[0020] The mesh screen sorting device comprises a ventilation duct 2 arranged at the discharge end of the ball mill, a plurality of drop openings 3 arranged below the ventilation duct 2, a branch pipe 4 is arranged below each drop opening 3, a collecting bucket 5 is arranged below each branch pipe 4, three supports are arranged on the inner wall of the ventilation duct 2 and above the drop opening 3, each support is provided with a pin and a spring 6, and the working ends of the three springs 6 are fixedly connected with a mesh screen plate 7;

[0021] The cyclone separation device includes a cylinder 8, which has a straight section 9 and a tapered section 10. The outer wall of the straight section 9 is provided with an air inlet pipe 11, the inner wall of the tapered section 10 is provided with a spiral groove 12 for spirally guiding the mixed air flow, a discharge valve 13 is provided at the bottom of the tapered section 10, and a tapered guide 14 for air flow guidance is provided above the discharge valve 13. A cover plate 15 is provided on the top of the cylinder 8, and a guide pipe 16 for spirally guiding the air flow is provided at the center of the cover plate 15.

[0022] Preferably, the sorting mechanism also includes a weak flow auxiliary device, which includes a snail-shaped shell arranged above the guide tube 16, a weak flow tube 17 is provided on the top of the inner wall of the snail-shaped shell, the pipe mouth of the weak flow tube 17 corresponds to the pipe mouth of the guide tube 16, and the snail-shaped shell is provided with an air outlet pipe 18.

[0023] Preferably, the inner walls on both sides close to the blanking port 3 are provided with conical slopes 19 for the lead powder to slide down, so as to prevent the lead powder from blocking the ventilation duct.

[0024] Preferably, the cross-sectional area of ​​the mesh plate 7 is between 50% and 70% of the cross-sectional area of ​​the ventilation duct 2, which is convenient for filtering and sorting.

[0025] Preferably, a support is provided between the conical guide 14 and the conical section 10 for fixing the two together.

[0026] In this embodiment, the mesh size of the plurality of mesh screen plates 7 decreases gradually from the air inlet end to the air outlet end, which is conducive to sorting by grade.

[0027] When the utility model is applied, the processed lead powder is sucked into the ventilation duct 2 by negative pressure, the lead powder airflow is blocked and filtered by the mesh screen plate 7, the larger particles of lead powder are blocked, and due to the effect of inertia, they fall from the drop port 3 to the collection bucket 5, and the smaller particles of lead powder are filtered by the mesh screen plate 7 and enter the next mesh screen sorting device. The principle is the same as before, and multiple mesh screen sorting devices can be set according to the production grade requirements of the lead powder.

[0028] Compared with the traditional air duct and baffle blocking sorting device, in the traditional technology, when the lead powder mixed air flow hits the baffle, the larger particles of lead powder and a part of the smaller particles of lead powder will fall down at the same time due to inertia, and the consistency of the lead powder size particles in the traditional technology sorting cannot be guaranteed. The mesh screen plate 7 of the utility model is fixedly set on the working surface of three springs 6. Under the impact of negative pressure wind force, the mesh screen plate 7 is vibrated by force. The principle is the same as that of the vibrating screen. First, it can accelerate the smaller particles of lead powder to pass through the mesh screen plate 7. Second, it can shake off some slag that blocks the mesh. Third, because the smaller particles of lead powder are easier to pass through the mesh screen plate 7, the consistency of the lead powder particles sorted by the mesh screen sorting device is also improved.

[0029] After being sorted by the multi-stage mesh sorting device, most of the lead powder particles are sorted and collected, and the remaining small number of smaller lead powder particles are sucked in from the feed end of the fan 1 and transported to the feed end of the cyclone sorting device. The lead powder mixed airflow spins downward along the inner wall of the straight section 9 of the cylinder 8, continues to spin downward along the spiral groove 12 of the conical section 10 and hits the conical guide 14. Due to the change in inertia, the lead powder falls into the collection bucket 5 from the gap between the conical guide 14 and the inner wall of the conical section 10 of the cylinder 8, and the cleaner air flows along the conical guide 14 to the center of the cylinder 8 to the guide pipe 16, and the air flows upward from the guide pipe 16 to the weak flow pipe 17, the kinetic energy of the air is weakened, and the air flow rate is reduced before being discharged from the outlet pipe 18.

[0030] Compared with the traditional cyclone sorting device, during sorting, when the rotating air flow runs from the straight section 9 to the conical section 10, the closer it gets to the bottom, the smaller the space and the greater the pressure, which will cause a small part of the lead powder air flow to not rotate to the bottom, and be directly output from the inner wall of the inner cavity of the cylinder 8 → central area → guide tube 16, causing part of the lead powder to be discharged with the air flow, resulting in incomplete sorting and waste. The utility model adds a spiral groove 12, a conical guide 14, and a weak flow auxiliary device. The spiral groove 12 can guide the mixed air flow to the bottom more thoroughly, so that a larger proportion of the mixed air flow can participate in the impact of the conical guide 14, so that a larger proportion of the lead powder can be collected. The weak flow auxiliary device weakens the kinetic energy and flow rate of the air flow, so that the kinetic energy of the discharged air flow that can carry away the lead powder is reduced, thereby improving the cyclone sorting efficiency.

[0031] Compared with the traditional technology, the utility model improves the consistency rate of lead powder sorting grades by improving the arrangement of a mesh screen sorting device and a cyclone sorting device, makes the sorting more thorough, and improves the collection rate of lead powder in the lead powder air flow.

[0032] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A sorting mechanism for lead powder, characterized in that: The sorting mechanism comprises a fan (1), the air inlet end of the fan (1) is provided with a plurality of mesh screen sorting devices, and the air outlet end of the fan (1) is provided with a cyclone sorting device: The mesh screen sorting device comprises a ventilation duct (2) arranged at the discharge end of the ball mill, a plurality of discharge ports (3) arranged below the ventilation duct (2), a branch pipe (4) arranged below each discharge port (3), and a collecting bucket (5) arranged below each branch pipe (4); three supports are arranged on the inner wall of the ventilation duct (2) and above the discharge port (3); each support is provided with a pin and a spring (6); and the working ends of the three springs (6) are fixedly connected to a mesh screen plate (7); The cyclone separation device comprises a cylinder (8), the cylinder (8) having a straight section (9) and a conical section (10), an air inlet pipe (11) being provided on the outer wall of the straight section (9), a spiral groove (12) for spirally guiding a mixed air flow being provided on the inner wall of the conical section (10), a discharge valve (13) being provided at the bottom of the conical section (10), a conical guide (14) for guiding an air flow being provided above the discharge valve (13), a cover plate (15) being provided at the top of the cylinder (8), and a guide pipe (16) for spirally guiding an air flow being provided at the center of the cover plate (15).

2. A lead powder separation mechanism according to claim 1, characterized in that: The sorting mechanism also includes a weak flow auxiliary device, which includes a snail-shaped shell arranged above the guide tube (16), a weak flow tube (17) is provided at the top of the inner wall of the snail-shaped shell, the tube opening of the weak flow tube (17) corresponds to the tube opening of the guide tube (16), and the snail-shaped shell is provided with an air outlet pipe (18).

3. A lead powder separation mechanism according to claim 1, characterized in that: Conical slopes (19) for the lead powder to slide down are provided on the inner walls on both sides close to the blanking opening (3).

4. A lead powder separation mechanism according to claim 1, characterized in that: The cross-sectional area of ​​the mesh plate (7) is between 50% and 70% of the cross-sectional area of ​​the ventilation duct (2).

5. A lead powder separation mechanism according to claim 1, characterized in that: A support column is provided between the conical guide (14) and the conical section (10) for fixing the two together.

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