Lead-acid battery grid continuous casting lead liquid supply system

Abstract

The present invention discloses a lead liquid supply system for continuous casting of lead-acid battery grids, comprising a fixed mold and a lead melting furnace for supplying lead liquid to the fixed mold, wherein the inner cavity of the lead melting furnace is divided into a lead melting pool and a working pool by a filter screen, and a lead block is placed in the lead melting pool. After melting, the lead liquid flows into the working pool through the filter screen and supplies the lead liquid to the fixed mold. The present invention filters impurities in the lead liquid through the filter screen, cuts the gas in the lead liquid through the filter screen and helps the gas float and precipitate. The structure reduces the gas and solid impurity content in the lead liquid when the mold is filled, improves the phenomenon of more pores and slag inclusions inside the continuous casting grid, and significantly improves the strength of the continuous casting grid.

Description

Technical Field

[0001] The invention relates to the technical field of continuous casting, and in particular to a lead liquid supply system for continuous casting of lead-acid battery grids. Background Art

[0002] As the most economical and environmentally friendly way to produce grids, the continuous casting technology for lead-acid battery grids has been widely recognized by lead-acid battery manufacturers. However, due to the lack of maturity of the technology and the large-scale use of recycled lead by domestic lead-acid battery manufacturers, the use of the continuous casting technology for lead-acid battery grids in China is not ideal, mainly manifested in the large number of pores and slag inclusions inside the continuously cast grids, which seriously affect the strength of the grids.

[0003] Therefore, in order to solve the above problems, a lead liquid supply system for continuous casting of lead-acid battery grid is proposed, which reduces the gas and impurities in the lead liquid during mold filling and significantly improves the strength of the continuous casting grid. Summary of the invention

[0004] In view of this, the present invention provides a lead liquid supply system for continuous casting of lead-acid battery grids, which reduces gas and impurities in the lead liquid during mold filling and significantly improves the strength of the continuous casting grids.

[0005] The lead liquid supply system for continuous casting of lead-acid battery grids of the present invention comprises a fixed mold and a lead melting furnace for supplying lead liquid to the fixed mold. The inner cavity of the lead melting furnace is divided into a lead melting pool and a working pool by a filter screen. Lead blocks are placed in the lead melting pool. After melting, the lead liquid flows into the working pool through the filter screen and supplies the lead liquid to the fixed mold.

[0006] Furthermore, an inert gas channel is provided in the lead molten pool, and the inert gas channel is substantially connected to the bottom of the lead molten pool.

[0007] Furthermore, the fixed mold is provided with a mating surface that conforms to the continuous moving mold of the battery, the fixed mold is provided with a liquid supply channel, and a lead outlet groove radially connected to the liquid supply channel is opened on the mating surface, one end of the liquid supply channel serves as a liquid inlet, and a lead delivery pipe runs through the liquid supply channel through its liquid inlet end, the outer end of the lead delivery pipe serves as a liquid inlet end and is connected to the working pool, the inner end of the lead delivery pipe is a closed end, and a plurality of lead outlet holes are arranged on the lead delivery pipe along the axial direction, the lead outlet holes are arranged corresponding to the lead outlet groove and the lead outlet groove exposes the lead outlet holes, the top of the liquid supply channel is recessed inward to form an exhaust groove extending along the direction of the liquid supply channel and connected to the lead outlet groove, and the exhaust groove is located above the lead outlet groove to receive the gas precipitated from the lead liquid.

[0008] Furthermore, the bottom of the liquid supply channel is recessed inward to form a lead flow groove extending along the direction of the liquid supply channel, and the lead flow groove is connected to the lead outlet groove on one side close to the matching surface.

[0009] Furthermore, the other end of the liquid supply channel is connected to the working pool as a liquid outlet to allow excess lead liquid to flow back into the working pool.

[0010] Furthermore, the upper side wall of the lead outlet groove is an upper guide slope that tilts upward from the outside to the exhaust groove side.

[0011] Furthermore, the lower side wall of the lead outlet trough is a lower guide slope that slopes downward from the outside lead flow trough side.

[0012] Furthermore, it also includes a partition connected to the inner cavity of the lead melting furnace, wherein the partition is located above the filter screen and is spliced ​​with the filter screen.

[0013] Furthermore, a plurality of heating holes are provided on the fixed mold approximately parallel to the liquid supply channel.

[0014] Furthermore, a plurality of cooling holes are provided on the fixed mold approximately parallel to the liquid supply channel.

[0015] Beneficial effects of the present invention:

[0016] In the present invention, the melted lead liquid will flow into the working pool through the filter screen, and the impurities in the lead liquid will be filtered through the filter screen, and the gas in the lead liquid will be cut through the filter screen and help the gas to float and precipitate. This structure reduces the content of gas and solid impurities in the lead liquid when the mold is filled. In addition, the inert gas is introduced into the bottom of the lead liquid and floats up to stir the lead liquid. The floating of the inert gas is conducive to bringing the gas and solid impurities originally existing in the lead liquid to the surface of the lead liquid, so that the scum is gathered at the surface of the lead liquid, preventing impurities from entering the working pool, which is conducive to degassing and deslagging, and finally entering the working pool. A small amount of gas in the lead liquid entering the working pool floats up and is discharged into the exhaust groove when the lead liquid is supplied to the fixed mold. The exhaust groove, as the last degassing process, is conducive to removing a small amount of gas in the lead liquid in the working pool; combined with the filter screen, the inert gas channel and the exhaust groove, the impurities and gases are removed in a three-dimensional manner in a dynamic and static manner during the initial melting stage of the lead liquid and the final liquid supply stage, which greatly reduces the amount of gas and impurities in the lead liquid during mold filling, improves the phenomenon of high pores and slag inclusions inside the continuous casting grid, and significantly improves the molding quality of the continuous casting grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the lead melting furnace structure;

[0020] Figure 3 It is a schematic diagram of the fixed mold structure;

[0021] Figure 4 for Figure 3 AA cross-sectional structure diagram; DETAILED DESCRIPTION

[0022] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the lead melting furnace structure; Figure 3 It is a schematic diagram of the fixed mold structure; Figure 4 for Figure 3 AA cross-sectional structure diagram;

[0023] As shown in the figure: the lead liquid supply system for continuous casting of lead-acid battery grids in this embodiment includes a fixed mold 10 and a lead melting furnace 20 for supplying lead liquid to the fixed mold. The inner cavity of the lead melting furnace 20 is divided into a lead melting pool 22 and a working pool 23 by a filter screen 21. The lead block is placed in the lead melting pool 22 and the lead liquid flows through the filter screen to the working pool 23 after melting and supplies the lead liquid to the fixed mold. The liquid outlet of the lead melting furnace can be directly connected to the liquid inlet of the fixed mold, or the liquid outlet of the lead melting furnace can be connected to the liquid inlet of the fixed mold through a lead pump. This embodiment adopts a solution of setting a lead pump, combined with Figure 1 As shown, the lead pump 30 is fixedly installed on the inner wall of the lead melting pool and driven by a motor 40. The motor is fixed on the outer wall of the lead melting pool and cooperates with the lead pump through a belt. The liquid inlet end of the lead pump is connected to the liquid outlet end of the lead melting furnace, and the liquid outlet end of the lead pump is connected to the liquid inlet end of the fixed mold through a lead inlet pipeline 31. The fixed mold cooperates with the battery continuous movable mold 50. The battery continuous movable mold 50 is a circular structure. The corresponding matching surface 11 of the fixed mold is arc-shaped. The matching surface 11 of the fixed mold fits the outer circle of the battery continuous movable mold 50. As the battery continuous movable mold 50 rotates, the battery continuous movable mold 50 is continuously supplied with lead liquid. The battery continuous movable mold 50 is driven to rotate by an external driving device. The battery continuous movable mold 50 is installed on a frame 60. An upper cover 70 is also installed on the frame. The upper cover 70 is half-covered on the battery continuous movable mold for capturing demoulding oil and lead smoke; the lead melting furnace 20 is a square furnace, and the filter screen 21 is vertically spaced in the inner cavity of the lead melting furnace 20 so that the lead melting pool 22 and the working pool 23 are distributed horizontally to the left and right. The bottom of the lead melting furnace 20 can be set horizontally or can be slightly inclined downward to the side of the working pool 23. The lead melting pool 22 can provide energy for melting the lead block by electric heating or gas heating. In the actual melting process, the lead block is added to the lead melting pool 22 to melt, and the molten lead liquid will flow into the working pool 23 through the filter screen. The impurities in the lead liquid are filtered out by the filter screen, and the gas in the lead liquid is cut by the filter screen and helps the gas to float and precipitate. This structure reduces the gas and solid impurity content in the lead liquid when the mold is filled, improves the phenomenon of high pores and slag inclusions inside the continuous casting grid, and significantly improves the strength of the continuous casting grid.

[0024] In this embodiment, the lead molten pool 22 has an inert gas channel 24, and the inert gas channel 24 is substantially connected to the bottom of the lead molten pool 22. Substantially connected to the bottom of the lead molten pool 22 means that the gas outlet end of the inert gas channel is located near the bottom of the lead molten pool 22, and the gas outlet end may contact the bottom of the lead molten pool 22 or maintain a certain distance; Figure 2 As shown, the inert gas channel 24 is composed of an air pipe, which is externally connected to an air supply device such as an air pump or an air compressor. The inert gas can be nitrogen or argon. The inert gas is introduced into the bottom of the lead liquid and floats up to stir the lead liquid. The floating of the inert gas is conducive to bringing the gas and solid impurities originally existing in the lead liquid to the surface of the lead liquid, so that the slag is gathered at the surface of the lead liquid, preventing impurities from entering the working pool, which is conducive to degassing and deslagging. This structure is combined with the filter screen 21 to realize the combination of dynamic degassing and deslagging and static degassing and deslagging, and comprehensively improves the effect of degassing and deslagging.

[0025] In this embodiment, the fixed mold is provided with a mating surface 11 which conforms to the continuous movable mold of the battery, the fixed mold is provided with a liquid supply channel, and a lead outlet groove 12 which is radially connected to the liquid supply channel is opened on the mating surface, one end of the liquid supply channel serves as a liquid inlet, and a lead delivery pipe 13 passes through the liquid supply channel through its liquid inlet end, the outer end of the lead delivery pipe 13 serves as a liquid inlet end and is connected to the working pool, the inner end of the lead delivery pipe is a closed end, and a plurality of lead outlet holes 14 are arranged on the lead delivery pipe along its axial direction, the lead outlet holes are arranged corresponding to the lead outlet groove and the lead outlet groove exposes the lead outlet holes, the top of the liquid supply channel is recessed inward to form an exhaust groove 15 extending along the direction of the liquid supply channel and connected to the lead outlet groove 12, and the exhaust groove is located above the lead outlet groove 12 to receive the gas precipitated from the lead liquid. The radial direction here is based on the lead pipe, the axial direction is the length direction of the lead pipe, and the radial direction is the direction of the lead pipe perpendicular to its length direction and perpendicular to the outer surface of the lead pipe; the top and bottom here correspond to the up and down directions of the liquid supply channel, and the up and down directions are in the same direction as the liquid supply system. Figure 1 The corresponding directions are consistent when the installation state is in Figure 3 and Figure 4 As shown, the outer end of the lead delivery pipe 13 is connected to the liquid inlet joint 19a, and the liquid inlet joint is connected to the lead inlet pipeline 31. The liquid lead passes through the lead delivery pipe 13 and the lead outlet hole 14 in turn to flow to the lead outlet groove 12 and is supplied to the continuous moving mold of the battery through the lead outlet groove 12. At this time, a small amount of gas in the liquid lead entering the working pool floats to the exhaust groove and is discharged from the liquid outlet of the liquid supply channel. The exhaust groove of this structure is arranged in the fixed mold as the last degassing process, which is conducive to removing a small amount of gas in the liquid lead in the working pool. Combined with the filter screen and the inert gas channel, impurities and gases are removed in a three-dimensional manner in the initial melting stage of the liquid lead and the final liquid supply stage through dynamic and static methods, which greatly reduces the amount of gas and impurities in the liquid lead when the mold is filled, and significantly improves the molding quality of the continuous casting grid.

[0026] In this embodiment, the bottom of the liquid supply channel is recessed inward to form a lead flow groove 16 extending along the direction of the liquid supply channel, and the lead flow groove 16 is connected to the lead outlet groove 12 on the side close to the mating surface. Through the setting of the lead flow groove, when the lead liquid is input into the battery continuous moving mold cavity from the lead outlet hole, the lead liquid will be filled into the lead flow groove, and the lead liquid accumulated in the lead flow groove will supplement the lead liquid in the mold cavity of the battery continuous moving mold during the rotation of the battery continuous moving mold, thereby effectively avoiding the phenomenon of insufficient lead liquid in the battery continuous moving mold cavity, and effectively improving the molding quality of the grid;

[0027] In this embodiment, the other end of the liquid supply channel is connected to the working pool 23 as a liquid outlet so that excess lead liquid can flow back to the working pool. Figure 3 As shown, a liquid inlet joint 19a and a liquid outlet joint 19b are respectively installed at the liquid inlet and the liquid outlet of the fixed mold, and the setting of the joint is conducive to the installation of the lead inlet pipeline 31 and the lead return pipeline 32. In actual use, flanges and other devices need to be welded and fully welded at the liquid inlet joint 19a and the liquid outlet joint 19b to fill the gaps in the lead flow grooves exposed at the liquid inlet and the liquid outlet of the liquid supply channel to prevent the lead liquid from leaking along the lead flow grooves; the reflux structure is conducive to the reflux of excess lead liquid, and the dynamic circulation of the lead liquid is conducive to providing sufficient lead liquid for the continuous moving mold of the battery, and is conducive to maintaining a constant pressure when the lead liquid is supplied, which helps to improve the forming quality of the grid.

[0028] In this embodiment, the upper side wall of the lead outlet groove is an upper guide slope 121 that is inclined upward from the outer exhaust groove 15 side. Figure 3 As shown, the upper guide slope 121 is conducive to guiding the gas precipitated from the lead liquid into the exhaust groove, preventing the gas from flowing into the battery continuous dynamic model cavity through the lead outlet groove.

[0029] In this embodiment, the lower side wall of the lead outlet groove is a lower guide slope 122 that slopes downward from the outer lead flow groove 16. Figure 3 As shown, the lower guide slope is conducive to filling the lead flow groove 16 with lead liquid, ensuring sufficient lead liquid replenishment.

[0030] In this embodiment, a partition 25 connected to the inner cavity of the lead melting furnace 2 is also included, and the partition is located above the filter screen and spliced ​​with the filter screen. The partition is mainly used in conjunction with the inert gas channel. When the lead liquid level submerges the partition, the scum floating on the lead liquid surface is blocked by the partition, so that the scum cannot enter the working pool, thereby ensuring the purity of the lead liquid in the working pool.

[0031] In this embodiment, a plurality of heating holes 17 are provided on the fixed mold approximately parallel to the liquid supply channel. In this embodiment, a plurality of cooling holes 18 are provided on the fixed mold approximately parallel to the liquid supply channel. Approximately parallel means that the heating holes and the cooling holes are arranged parallel to the liquid supply channel and a certain error or deviation is allowed; combined with Figure 4 As shown, three heating holes and three cooling holes are respectively arranged on the fixed mold, six of which are arranged around the liquid supply channel. Figure 1 As shown, a temperature control component 80 is also provided to match the heating hole and the cooling hole. The temperature control component is used to heat the heating hole or cool the cooling hole. An electric heating rod can be inserted into the heating hole, and the electric heating rod is controlled to be turned on and off by the temperature control component. Air supply equipment is connected inside and outside the cooling hole, and the opening and closing of the air supply equipment is controlled by the temperature control component. Air cooling is achieved through this structure. In addition, a temperature sensor is provided at the fixed mold, and the signal of the temperature sensor is fed back to the temperature control component, and then the heating hole or the cooling hole is controlled to work through the temperature control component so that the fixed mold is maintained within a preset temperature range; of course, liquid can also be passed into the heating hole and the cooling hole to achieve heating or cooling, which will not be described in detail; the temperature increase and decrease of the fixed mold can be actively controlled through the heating hole or the cooling hole, which is conducive to accurate and timely control of the temperature of the fixed mold.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A lead liquid supply system for continuous casting of lead-acid battery grids, characterized in that: The invention comprises a fixed mold and a lead melting furnace for supplying lead liquid to the fixed mold, wherein the inner cavity of the lead melting furnace is divided into a lead melting pool and a working pool by a filter screen, and a lead block is placed in the lead melting pool, and after melting, the lead liquid flows into the working pool through the filter screen and supplies the lead liquid to the fixed mold; the lead melting pool is provided with an inert gas channel, and the gas outlet end of the inert gas channel is located near the bottom of the lead melting pool; The fixed mold is provided with a mating surface conforming to the continuous moving mold of the battery, the fixed mold is provided with a liquid supply channel, the mating surface is provided with a lead outlet groove radially connected to the liquid supply channel, one end of the liquid supply channel serves as a liquid inlet, a lead delivery pipe runs through the liquid supply channel through its liquid inlet end, the outer end of the lead delivery pipe serves as a liquid inlet end and is connected to the working pool, the inner end of the lead delivery pipe is a closed end, a plurality of lead outlet holes are arranged along the axial direction of the lead delivery pipe, the lead outlet holes are arranged corresponding to the lead outlet groove and the lead outlet groove exposes the lead outlet holes, the top of the liquid supply channel is recessed inwardly to form an exhaust groove extending along the direction of the liquid supply channel and connected to the lead outlet groove, the exhaust groove is located above the lead outlet groove and is used to receive the gas precipitated from the lead liquid; The invention also comprises a partition plate connected to the inner cavity of the lead melting furnace, wherein the partition plate is located above the filter screen and is spliced ​​with the filter screen.

2. The lead-acid battery grid continuous casting lead liquid supply system according to claim 1, characterized in that: The bottom of the liquid supply channel is recessed inward to form a lead flow groove extending along the direction of the liquid supply channel, and the lead flow groove is connected to the lead outlet groove on one side close to the matching surface.

3. The lead liquid supply system for continuous casting of lead-acid battery grid according to claim 1, characterized in that: The other end of the liquid supply channel is connected to the working pool as a liquid outlet so that excess lead liquid can flow back to the working pool.

4. The lead liquid supply system for continuous casting of lead-acid battery grid according to claim 1, characterized in that: The upper side wall of the lead outlet groove is an upper guide inclined surface inclined upward from the outside to the exhaust groove side.

5. The lead liquid supply system for continuous casting of lead-acid battery grid according to claim 2, characterized in that: The lower side wall of the lead outlet trough is a lower guide slope that tilts downward from the outside lead flow trough side.

6. The lead liquid supply system for continuous casting of lead-acid battery grid according to claim 1, characterized in that: The fixed mold is provided with a plurality of heating holes approximately parallel to the liquid supply channel.

7. The lead liquid supply system for continuous casting of lead-acid battery grids according to claim 6, characterized in that: The fixed mold is provided with a plurality of cooling holes approximately parallel to the liquid supply channel.

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