Oil supply mechanism in grid continuous casting lubricating system

Abstract

An oil supply mechanism of a grid continuous casting lubricating system comprises a main oil tank capable of draining water and a secondary oil tank capable of stably outputting lubricating oil, the main oil tank stores the lubricating oil, a water storage tank capable of storing water is arranged at the bottom of the main oil tank, and the water storage tank can monitor the water storage amount and automatically drain water according to the water storage amount; oil is pressed into the secondary oil tank by compressed air input into the main oil tank, the secondary oil tank is provided with double cavities separated by a piston, the two cavities of the secondary oil tank can be controlled to alternately work, the oil is buffered, and the buffered oil is output into a next-stage working mechanism; a flow meter is arranged at the oil outlet valve, and the compressed air pressure is changed by monitoring the oil flow so as to adjust the oil conveying flow.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of lead-acid battery grid continuous casting, in particular to an oil supply system in a grid continuous casting mold lubrication system. BACKGROUND

[0002] The grid is the main component of the lead-acid battery, which is a grid-shaped structure component that supports the active material inside the lead-acid battery plate. Grid continuous casting is a new production process based on the growing demand for lead-acid batteries: molten lead alloy is continuously pumped by a lead pump to the cavity between the rotating mold and the fixed mold, and the grid is continuously drawn out in a mesh belt type through the rotation and cooling of the rotating mold.

[0003] Patent No. ZL202211230124.X discloses a lubrication system for a grid continuous casting mold. The lubrication system of the patent provides two ways to supply lubricating oil: one is to use an oil pump to directly pump lubricating oil, and the other is to use compressed air to pressurize lubricating oil. In actual use, the following problems are encountered:

[0004] Low-flow precision oil pumps that can be used stably for a long time have high costs. After comprehensive cost analysis, compressed air is more commonly used to pressurize lubricating oil in actual production. Because air contains water, and some manufacturers' compressed air manufacturing equipment does not have a water filtration function, water in the air is brought into the lubricating oil container. A small amount of water mixed in the lubricating oil at the initial stage does not affect the lubrication effect, but as the water accumulates in the container, the water content of the lubricating oil output by the lubrication system becomes higher. Because water has a higher density than lubricating oil, water in the air will continue to accumulate at the bottom of the container, and when the water level reaches the oil outlet, a large amount of water will be output to the surface of the mold, affecting the lubrication effect and causing quality problems in the grid.

[0005] Using compressed air to pressurize lubricating oil also has the problem of unstable output. Because the compressed air fluctuates greatly, the hydraulic oil surface is always in contact with the compressed air and is disturbed. At the initial stage of use, because the oil surface is high, the oil itself acts as a buffer medium to buffer the disturbance, but as the system runs and the oil surface drops, especially when the volume of compressed air in the container is larger than that of the lubricating oil, the liquid surface fluctuation becomes more intense, affecting the stability of the oil output. In actual production, workers need to operate the oil outlet adjusting valve every 20 minutes to adjust the output of oil. In some factories, the compressed air equipment is particularly unstable, and even needs to be adjusted every few minutes.

[0006] Therefore, it is necessary to redesign a set of solutions to address the output characteristics of the grid continuous casting lubrication system and the characteristics of compressed air, which can buffer the disturbance of compressed air and filter water in the air, and continuously output stable lubricating oil with low water content. SUMMARY

[0007] In view of the above, the present application aims to solve the above-mentioned technical problems, and provides an oil supply mechanism in a continuous casting mold lubrication system for a grid, which comprises a drainable main oil tank and a secondary oil tank for smooth output of lubricating oil, the main oil tank stores lubricating oil and is provided at the bottom with a water storage tank for water accumulation.

[0008] Further, the main oil tank is provided with an oil delivery cavity with an opening downward, which is a round pipe with one end open, and the outside of the oil delivery cavity is connected with the inside of the main oil tank; the main oil tank is provided above with an air inlet for input of compressed air; the oil delivery cavity is provided with an oil delivery pipe, and under the action of compressed air, the oil level in the main oil tank is lowered, while the oil level in the oil delivery cavity is raised, and the oil is pressed into the oil delivery pipe in the oil delivery cavity.

[0009] Further, the main oil tank is provided at the bottom with a water storage tank for water accumulation, and since the compressed air contains water and the density of water is greater than that of lubricating oil, the water mixed into the oil will accumulate in the water storage tank at the bottom of the main oil tank; the oil delivery cavity extends into the water storage tank for a distance, and the opening of the oil delivery cavity faces downward and is connected with the water storage tank.

[0010] Further, the water storage tank is provided with a water drain valve which can be controlled to open and close, and a water sensor for monitoring the water storage amount, and when the water sensor detects that the water level exceeds a set height, the water drain valve is opened to drain water, and when the sensor detects that the water level is lower than the set height, the water drain valve is closed.

[0011] Further, the main oil tank and the secondary oil tank are connected through an oil delivery circuit controlled by at least one hydraulic control valve block, and the oil delivery circuit comprises an oil delivery pipeline one for delivering the oil in the oil delivery pipe to the secondary oil tank and an oil delivery pipeline two for output of the buffered oil in the secondary oil tank.

[0012] Further, the secondary oil tank comprises a piston and piston rods at both ends of the piston, the piston is provided with a marker and the secondary oil tank is provided with a sensor for identifying the marker, the piston rod is provided with a spring, and the piston divides the secondary oil tank into two non-communicating secondary oil cavities.

[0013] Further, the oil delivery pipeline one is connected with the oil delivery pipe and both ends of the secondary oil tank respectively, and both ends are connected with the two secondary oil cavities respectively, and the oil delivery pipeline one can be controlled by the hydraulic control valve block to select one of the two secondary oil cavities for oil delivery when the oil delivery pipeline one works; the oil delivery pipeline two is connected with both ends of the secondary oil tank and an oil outlet valve respectively, and the oil delivery pipeline two can be controlled by the hydraulic control valve block to select the other secondary oil cavity for oil pumping when the oil delivery pipeline two works.

[0014] When one of the two secondary oil chambers receives oil from the oil supply pipeline 1, the other secondary oil chamber outputs oil to the oil supply pipeline 2, and the piston moves in the direction of the reduced oil, when any one of the secondary oil chambers is emptied, i.e. the piston moves to either end, the sensor identifies the movement of the marker on the piston to the end edge, sends a signal, and the hydraulic control valve block switches the working mode of the two secondary oil chambers; when the oil supply pipeline 1 stops supplying oil, for example, the air inlet is blocked or the related air path fails, because the secondary oil chamber still retains an oil volume equal to the maximum volume of the secondary oil tank, it can still work normally for a period of time.

[0015] Further, the oil supply pipeline 2 is also provided with a flow meter for detecting the oil flow, and the flow meter is connected with the upper computer, and the upper computer detects that the flow in the oil supply pipeline 2 is not within the set range, and then adjusts the compressed air pressure input to the main oil tank, so as to change the oil supply speed of the oil supply mechanism.

[0016] The beneficial effects of the present application are as follows: a kind of oil supply mechanism in the lubrication system of plate grid continuous casting mold including water storage tank is designed, which can accumulate water and automatically drain according to the accumulation amount;At the same time, a secondary oil tank capable of buffering oil is set according to the working characteristics of compressed air oil, and through the structure of the secondary oil tank, the present application can work in emergency for a period of time when failure occurs;And negative feedback control is established, and the size of compressed air pressure can be dynamically adjusted by setting flow meter to detect oil flow, so as to reduce manual work and improve automation level. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described below in combination with the drawings and embodiments:

[0018] Figure 1 It is the overall schematic diagram of the oil supply mechanism;

[0019] Figure 2 It is the sectional view of the main oil tank;

[0020] Figure 3 It is the sectional view of the secondary oil tank;

[0021] Figure 4 It is the schematic diagram of oil circuit;

[0022] Figure 5 It is the chamber schematic diagram of the secondary oil tank. DETAILED DESCRIPTION

[0023] In this embodiment, a kind of oil supply mechanism in grid continuous casting mold lubrication system is provided, including drainable main oil tank 4 and the secondary oil tank 9 of smooth output lubricating oil, the main oil tank 4 and secondary oil tank 9 whole body uses conventional carbon structural steel, such as Q235 etc., if need to manufacture larger oil tank, stronger steel can also be used, here is the conventional design selection, no longer tedious here;The main oil tank stores lubricating oil and is provided with the water storage tank 3 of water accumulation in the bottom of main oil tank, water storage tank inner wall needs blackening treatment or smears waterproof paint, to avoid long-term soaking water oil mixture causes water storage tank rust.

[0024] In this embodiment, the main oil tank 4 is provided with an oil delivery cavity opening downward, the oil delivery cavity 401 is a circular tube with one end opening, the outside of the oil delivery cavity 401 is connected with the inside of the main oil tank 4 through the welding of rib plate, a bolt mounting structure of integral molding can also be used, and an open support fixing structure can also be made on the transition surface of the main oil tank and the water storage tank, as long as the oil delivery cavity can be fixed and the flow of oil in different functional areas is not affected, no longer tedious here;The main oil tank 4 is provided with an air inlet for inputting compressed air, the compressed air is generated by an air compressor purchased from the market, the air compressor is connected with the air inlet, and the air compressor is started during equipment operation, so that the oil in the main oil tank can be continuously pressed out;The oil delivery cavity 401 is provided with an oil delivery pipe, and under the action of compressed air, the oil level in the main oil tank 4 is lowered, while the oil level in the oil delivery cavity 401 is raised, and the oil is pressed into the oil delivery pipe 402 in the oil delivery cavity under the action of pressure;Since the impact force of the compressed air for sending lubricating oil is large, the oil is sent by the oil level rising from the main oil tank bottom to the oil delivery cavity 401, compared with the mode without oil delivery cavity, the oil output is more stable, and the oil shortage caused by the violent fluctuation of oil level will not occur.

[0025] In this embodiment, the main oil tank is provided with the water storage tank 3 for accumulating water, since the compressed air contains water, and the density of water is greater than that of lubricating oil, the water mixed into the oil will accumulate in the water storage tank 3 at the bottom of the main oil tank;The oil delivery cavity 401 extends into the water storage tank 3 for a distance, and the opening of the oil delivery cavity is downward and communicates with the water storage tank 3, after extending into the water storage tank 3 for a distance, the oil must pass through the water storage tank 3 first to enter the oil delivery cavity, since water and lubricating oil are not mutually soluble and the density of water is greater than that of oil, water is more likely to accumulate in the water storage tank 3, and since the oil delivery process is from the lower part of the main oil tank 4 to the upper part through the oil delivery pipe, under the action of gravity, it is more difficult for water to be delivered to the oil delivery pipe 402.

[0026] In this embodiment, as Figure 2As shown, the water storage tank 3 is equipped with a controllable drain valve 1 and a water sensor 2 for monitoring the water level. The water sensor is a common monitoring device on the market and will not be described in detail here. When the water sensor detects that the water level exceeds the set height, the drain valve 1 is opened to release water. When the sensor detects that the water level is below the set height, the drain valve 1 is closed. Since the oil is pumped by compressed air, the oil fluctuates violently. If the valve is opened to release water every time a little water is accumulated, it is easy to discharge a water-oil mixture with a large proportion of oil, resulting in waste. Therefore, it is set to drain water only when the water level exceeds a certain amount to reduce the number of times water is drained.

[0027] In this embodiment, the main oil tank 4 and the secondary oil tank 9 are connected by an oil delivery circuit controlled by at least one hydraulic control valve block. In this scheme, the hydraulic control valve block adopts two three-port two-position valves, namely an oil injection valve 7A that inputs oil from the main oil tank to the secondary oil tank, and an oil delivery valve 7B that inputs oil from the secondary oil tank to the oil outlet valve. The oil delivery circuit includes an oil delivery pipeline one that transports oil from the oil delivery pipeline to the secondary oil tank. The oil delivery pipeline one is equipped with a one-way valve 6 to prevent oil from flowing back from the secondary oil tank. The oil delivery circuit also includes an oil delivery pipeline two that outputs buffered oil from the secondary oil tank. The oil delivery pipeline two is also equipped with a one-way valve 6 to prevent oil from flowing back from the oil outlet valve.

[0028] In this embodiment, as Figure 1 and Figure 3 The secondary oil tank 9 shown includes a piston 901 and a piston rod 902 integrally formed with the piston. The piston 901 is provided with a marker, and a sensor that can identify the marker is provided in the secondary oil tank. In this design, a ring of magnets 9011 is set in the middle of the piston, and a magnetic induction sensor 904 is provided. A spring 903 is installed on the piston rod, which can buffer the impact of the oil. The piston divides the secondary oil tank into two non-interconnected secondary oil chambers. The piston and the inner wall of the secondary oil tank achieve liquid sealing without affecting relative movement. Therefore, a sealing ring 9012 needs to be set on the piston, and the tolerance of the piston bore and shaft fit and the surface roughness are controlled. The relevant selection and design are common technical knowledge known to those skilled in the art and will not be described in detail here.

[0029] In this embodiment, the first oil pipeline is connected to both ends of the oil pipeline and the secondary oil tank, and both ends are connected to the two secondary oil chambers. When the first oil pipeline is in operation, it can be controlled by the oil injection valve to select one of the secondary oil chambers for oil delivery. The second oil pipeline is connected to both ends of the secondary oil tank and the oil outlet valve. When the second oil pipeline is in operation, it can be controlled by the oil delivery valve to select the other secondary oil chamber for oil extraction. The oil outlet valve is the target downstream device for outputting the processed oil, and will not be described in detail here.

[0030] When one of the two secondary oil chambers, M, receives oil from the first oil supply line, the other secondary oil chamber, N, outputs oil to the second oil supply line. The piston moves in the direction of decreasing oil volume. When either secondary oil chamber is emptied (i.e., the piston moves to either end), a magnetic induction sensor detects a ring of magnets on the piston. The host computer then controls two three-port two-position valves to switch the operating modes of the two secondary oil chambers. Since a single secondary oil chamber will not simultaneously receive and discharge oil, each end of the secondary oil tank is equipped with a three-way interface 8. The large port of the three-way interface 8 is connected to one end of the secondary oil tank 9, and the other two small ports are connected to the first and second oil supply lines, respectively. When the first oil supply line stops supplying oil, for example, if the air inlet to the compressed air is blocked or there is a related air circuit failure, the secondary oil chambers still retain oil equal to the maximum volume of the secondary oil tank, allowing normal operation for a period of time.

[0031] The host computer refers to the control system of this organization, which receives monitoring information provided by the sensors of this organization and operates the displacement of each valve block and changes the compressed air pressure.

[0032] Combination Figure 4 and Figure 5 The working principle of the secondary oil tank and oil transfer circuit is explained as follows: The oil injection valve 7A connects A1-B1, and the oil transfer valve 7B connects C2-A2. Figure 5 Oil is received in chamber M and discharged from chamber N. The piston moves to the right in the diagram. When the piston reaches its far right, it triggers the sensor, and the system control pipeline switches. At this time, the oil injection valve 7A connects A1-C1, and the oil delivery valve 7B connects B2-A2. Figure 5 Oil is supplied to chamber N and discharged from chamber M. The piston moves to the left in the diagram. When the piston moves to the far left, it triggers the sensor, and the system controls the pipeline to switch again. This process is repeated continuously to achieve continuous oil supply.

[0033] Combination Figure 4 and Figure 5This explains the principle behind the secondary oil tank continuing to operate for a period of time when the main oil tank stops supplying oil during a malfunction: When oil is discharged from the N chamber (i.e., during the piston's rightward movement), a gas circuit malfunction causes the main oil tank to stop supplying oil, triggering an alarm in the host computer system, awaiting maintenance personnel. At this time, the oil injection valve 7A connects A1-B1, and the oil delivery valve 7B connects C2-A2. Simultaneously, the one-way valve 6 prevents oil backflow. The situation is divided into two scenarios: the piston has crossed the center line or not. If the piston has not crossed the center line, the spring in the N chamber is stretched, and the spring in the M chamber is compressed, allowing the piston to continue moving to the right and oil to be discharged from the N chamber. If the piston has crossed the center line, the spring in the N chamber is compressed, and the host computer controls the oil circuit switching, causing the piston to move to the left, and oil to be discharged from the M chamber. When the piston finally stabilizes in the middle position, since the springs on both sides have no deformation and cannot push the piston, and the magnetic induction sensor in the secondary oil tank detects that the magnetic signal remains in the middle, it will notify relevant personnel, triggering an alarm and requiring the mold equipment to be shut down.

[0034] In this embodiment, the second oil pipeline is also equipped with a flow meter 10 for detecting the flow rate of the oil. The flow meter 10 is connected to the host computer. When the host computer detects that the flow rate in the second oil pipeline is not within the set range, it controls the electronically controlled proportional valve 5 that affects the amount of compressed air input, thereby changing the compressed air pressure of the main oil tank and changing the oil supply speed of the oil supply mechanism.

[0035] This invention designs an oil supply mechanism in a continuous casting mold lubrication system including a water storage tank, capable of accumulating water and automatically draining it according to the accumulated amount; simultaneously, based on the working characteristics of compressed air pressurizing oil, a secondary oil tank is set up to buffer the oil, and through the structure of the secondary oil tank, this invention can operate for a period of time in case of failure; and a negative feedback control is established, which dynamically adjusts the compressed air pressure by setting a flow meter to detect the oil flow rate, reducing manual labor and improving the level of automation.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An oil supply mechanism for a continuous casting lubrication system for plate grids, characterized in that: It includes a main oil tank that can drain water and a secondary oil tank that can smoothly output lubricating oil. The main oil tank stores lubricating oil and a water storage tank that can store water is provided at the bottom of the main oil tank.

2. The oil supply mechanism of the continuous casting lubrication system for grids according to claim 1, characterized in that: The main oil tank has a downward-facing oil delivery chamber, which is a circular pipe with one open end. The outside of the oil delivery chamber is connected to the inside of the main oil tank. An air inlet for compressed air is provided above the main oil tank. An oil delivery pipe is installed inside the oil delivery chamber. Under the action of compressed air, the oil level in the main oil tank is reduced, while the oil level in the oil delivery chamber is increased, and the oil is forced into the oil delivery pipe in the oil delivery chamber.

3. The oil supply mechanism of the continuous casting lubrication system for grids according to claim 2, characterized in that: The main oil tank is equipped with a water storage tank at the bottom. Since compressed air contains water and water has a higher density than lubricating oil, the water mixed in with the oil will accumulate in the water storage tank at the bottom of the main oil tank. The oil delivery chamber extends into the water storage tank a certain distance, and the opening of the oil delivery chamber faces downward and is connected to the water storage tank.

4. The oil supply mechanism of the continuous casting lubrication system for grids according to claim 3, characterized in that: The water storage tank is equipped with a controllable drain valve and a water sensor that monitors the water level. When the water sensor detects that the water level exceeds the set height, the drain valve is opened to release water. When the sensor detects that the water level is below the set height, the drain valve is closed.

5. The oil supply mechanism of the continuous casting lubrication system for grids according to claim 2, characterized in that: The main oil tank and the secondary oil tank are connected by an oil delivery circuit controlled by at least one hydraulic valve block. The oil delivery circuit includes an oil delivery pipeline one that delivers oil from the main oil tank to the secondary oil tank and an oil delivery pipeline two that outputs buffered oil from the secondary oil tank.

6. The oil supply mechanism of the continuous casting lubrication system for grids according to claim 5, characterized in that: The secondary oil tank includes a piston and piston rods at both ends of the piston. The piston is equipped with a marker and the secondary oil tank is equipped with a sensor that can identify the marker. A spring is mounted on the piston rod. The piston divides the secondary oil tank into two non-communicating secondary oil chambers.

7. The oil supply mechanism of the continuous casting lubrication system for grids according to claim 6, characterized in that: The first oil pipeline is connected to both ends of the oil pipeline and the secondary oil tank, and both ends are connected to the two secondary oil chambers. When the first oil pipeline is in operation, it can be controlled by the hydraulic control valve block to select one of the secondary oil chambers for oil delivery. The second oil pipeline is connected to both ends of the secondary oil tank and the oil outlet valve. When the second oil pipeline is in operation, it can be controlled by the hydraulic control valve block to select the other secondary oil chamber for oil extraction. When one of the two secondary oil chambers receives oil from the first oil supply line, the other secondary oil chamber supplies oil to the second oil supply line. The piston moves in the direction of decreasing oil volume. When either secondary oil chamber is emptied, i.e., the piston moves to either end, the sensor detects that the marker on the piston has moved to the end edge and sends a signal. The hydraulic control valve block then switches the operating modes of the two secondary oil chambers. When the first oil supply line stops supplying oil, the secondary oil chambers still retain oil equal to the maximum volume of the secondary oil tank, allowing them to continue operating normally for a period of time.

8. The oil supply mechanism of the continuous casting lubrication system for grids according to claim 5, characterized in that: The second oil pipeline is also equipped with a flow meter for detecting the oil flow rate. The flow meter is connected to a host computer. When the host computer detects that the flow rate in the second oil pipeline is not within the set range, it adjusts the pressure of the compressed air input to the main oil tank to change the oil supply speed of the oil supply mechanism.

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