Uniform adding device for rolling oil additive

Abstract

The invention discloses a rolling oil additive uniform adding device which comprises an oil tank, a batching tank and an oil pumping mechanism, the batching tank is arranged on the outer side of the oil tank, the batching tank is used for blending base oil and an additive into a mixed solution, and the oil pumping mechanism is used for injecting the blended mixed solution in the batching tank into the oil tank. The additive and the base oil are mixed in advance through the batching box, so that the additive is completely dissolved in the base oil to form a uniformly-mixed high-concentration additive mixed solution, the mixed solution has fluidity, consumption components in the rolling oil in the oil tank can be conveniently supplemented and added, the defect that the dissolving amount of a solid additive is uncontrollable is overcome, and the service life of the rolling oil is prolonged. And the mixed liquid of the high-concentration additive is finally added into the oil tank of the rolling oil, so that the concentration of the additive in the oil tank is kept constant.

Description

Technical Field

[0001] This invention relates to the field of aluminum foil processing technology, and more specifically to a device for uniformly adding rolling oil additives. Background Technology

[0002] In the processing of battery aluminum foil, the billet needs to be fed into a rolling mill for rolling. The rolling force transforms the relatively thick billet into aluminum foil. A large amount of heat is generated during the aluminum foil rolling process, necessitating the spraying of rolling oil onto the rolling surface. This oil lubricates and cools the aluminum foil. The components of rolling oil typically include base oil (usually kerosene) and additives (such as pentaerythritol esters, phenolic ether phosphates, emulsifiers, rust inhibitors, etc.). Adjusting the chemical composition can improve oil film strength and friction performance.

[0003] During use, rolling oil, stored in an oil tank, is added between the rolling rolls via an oil pump to lubricate and cool the rolled aluminum foil. After use, the rolling oil is collected and returned to the rolling oil tank, where it is pumped back into the rolling rolls for repeated lubrication and cooling of the aluminum foil. During the collection process, base oil and additives are consumed at varying rates, with a higher proportion of additives being consumed. This causes a gradual decrease in the additive concentration in the rolling oil within the tank. Therefore, continuous replenishment of the additives is necessary to ensure the stability of the rolling oil's composition during the rolling process and to guarantee rolling quality.

[0004] In current rolling oil systems, additives are manually added to the oil tank periodically. However, this process leads to localized accumulation of additives, resulting in excessively high concentrations in the initial addition area and low concentrations in other areas after the additives are consumed. This uneven composition of the rolling oil causes instability in the quality of rolled products. Furthermore, because some additives have long carbon chains and are solid at room temperature, their melting and mixing with the base oil takes time, further extending the mixing time and making the dissolution uncontrollable. Adding additives daily, especially since some high-molecular-weight additives are solid at room temperature and do not dissolve easily, results in significant fluctuations in the additive content of the rolling oil. This further exacerbates the unevenness of the rolling oil and negatively impacts product quality stability. Summary of the Invention

[0005] The purpose of this invention is to solve the technical problem of uneven mixing of additives in rolling oil during use, and to provide a device for uniformly adding additives to rolling oil.

[0006] To achieve the above objectives, the present invention employs the following technical solution:

[0007] A rolling oil additive uniform addition device includes an oil tank, a mixing box, and an oil extraction mechanism. The mixing box is located outside the oil tank and is used to mix base oil and additives into a mixture. The oil extraction mechanism is used to inject the mixture prepared in the mixing box into the oil tank.

[0008] Furthermore, a premixing tank is provided inside the oil tank, and a return oil pipe is fixedly connected to the oil tank, extending into the premixing tank; an oil extraction mechanism is provided inside the premixing tank, and a suction pipe is connected to the oil extraction mechanism, extending into the mixing tank; the return oil pipe is connected to the oil extraction mechanism and drives the oil extraction mechanism to draw the mixture in the mixing tank into the premixing tank through the suction pipe during oil return; an outlet hole is provided on the side wall of the premixing tank, and the outlet hole discharges the rolled oil mixed in the premixing tank into the oil tank.

[0009] Furthermore, the oil extraction mechanism includes a drive housing, within which a rotating shaft is rotatably connected. A helical blade is connected to the rotating shaft. A return oil pipe is fixed to the drive housing, and its inner cavity communicates with the interior of the drive housing to guide the refluxed rolling oil into the drive housing, flowing through the helical blade to rotate the rotating shaft. The upper end of the rotating shaft extends to the outside of the drive housing and is fixedly connected to a turntable. An oil extraction cylinder is fixedly connected to the premixing tank, and a piston is slidably connected within the oil extraction cylinder. The piston divides the oil extraction cylinder into a working chamber and an auxiliary chamber. The turntable is connected to the piston drive to drive the piston to reciprocate within the oil extraction cylinder when the turntable rotates; the suction pipe is connected to the side wall of the oil extraction cylinder and its inner cavity is connected to the working chamber; an oil outlet pipe is fixedly connected to the side wall of the oil extraction cylinder, and its inner cavity is connected to the working chamber; the end of the oil outlet pipe away from the oil extraction cylinder faces the inner cavity of the premixing tank; a first one-way valve is installed on the suction pipe to allow the fluid in the suction pipe to flow unidirectionally towards the oil extraction cylinder, and a second one-way valve is installed on the oil outlet pipe to allow the fluid in the oil outlet pipe to flow unidirectionally towards the premixing tank.

[0010] Furthermore, a drive rod is fixedly connected to the piston, the drive rod is arranged parallel to the turntable, the drive rod passes through the auxiliary cavity and is fixedly connected to a drive block, the drive block has a strip groove, the strip groove is arranged perpendicular to the drive rod, a pin is fixedly connected to the turntable, the pin is offset from the rotation axis of the turntable, and the pin is inserted into the strip groove.

[0011] Furthermore, the lower end of the rotating shaft extends to the bottom of the premixing tank, and multiple blades are fixedly connected to the rotating shaft, with the multiple blades arranged in a circumferential array on the shaft body of the rotating shaft.

[0012] Furthermore, the drive housing includes a housing cover and a sealing plate fixed to the upper end of the housing cover. The lower end of the housing cover is an open structure with the opening facing the premixing tank. A fixed cylinder is fixedly connected to the sealing plate. The rotating shaft passes through the fixed cylinder and rotates with the fixed cylinder. The oil return pipe is fixed on the housing cover and located above the spiral blade.

[0013] Furthermore, the diameter of the housing near the helical blade is smaller than the diameter at the point where the housing connects to the return oil pipe.

[0014] Furthermore, a switch valve for controlling the on / off state of the return oil pipe is installed on the return oil pipe.

[0015] Furthermore, the batching box is equipped with a batching motor, and the output shaft of the batching motor is fixedly connected to a second stirring rod. The second stirring rod extends into the inside of the batching box, and the batching motor drives the second stirring rod to rotate and stir the materials in the batching box.

[0016] This invention also provides a method for uniformly adding rolling oil additives, using the aforementioned rolling oil additive uniform addition device, and adding the additives according to the following steps:

[0017] Step S01: Add the supplementary base oil and additives to the mixing tank, and stir the base oil and additives in the mixing tank to form a uniformly dissolved mixture.

[0018] Step S02: Connect the return oil pipe of the recovered rolling oil to the oil pumping mechanism, open the switch valve on the return oil pipe, and use the return oil pump (not shown in the figure) to transport the recovered rolling oil through the return oil pipe to the drive housing. The recovered rolling oil flows downward through the drive housing into the premixing tank. When the rolling oil flows through the drive housing, it drives the rotating shaft to rotate, which in turn drives the piston to reciprocate and draw the mixed liquid material prepared in the batching box into the premixing tank.

[0019] Step 03: The mixture drawn into the premixing tank is mixed with the rolling oil recovered in the premixing tank. When the rotating shaft rotates, it drives the paddle to rotate, so that the materials in the premixing tank are fully mixed.

[0020] Step S04: After the premixing oil recovered in the premixing tank is mixed with the mixture, it is discharged into the oil tank through the liquid outlet to replenish the rolling oil in the oil tank.

[0021] The present invention provides a rolling oil additive uniform addition device, which has the following beneficial effects: The additive is pre-mixed with the base oil in the mixing tank, so that the additive is completely dissolved in the base oil to form a uniformly mixed high-concentration additive mixture. The mixture has fluidity, which facilitates the replenishment of consumed components in the rolling oil in the oil tank, overcoming the defect of uncontrollable solid additive dissolution and improving replenishment uniformity. By finally adding the high-concentration additive mixture to the rolling oil tank, the additive concentration in the oil tank is kept constant. The premixing tank mixes the returned rolling oil with the additive-added mixture, thereby timely replenishing the consumed additives and base oil in the returned rolling oil, thus maintaining the stability of the additive content in the rolling oil and ensuring the stability of the aluminum foil rolling effect. Attached Figure Description

[0022] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the internal structure of a rolling oil additive uniform addition device provided by the present invention.

[0024] Figure 2 This is a schematic diagram of the premixing tank and oil pumping mechanism in a rolling oil additive uniform addition device provided by the present invention.

[0025] Figure 3 for Figure 2 A schematic diagram of the partial structure of part A in the middle.

[0026] Figure 4 This is a top view of the drive rod and turntable assembly in a rolling oil additive uniform addition device provided by the present invention.

[0027] The following are the labels in the diagram: 1. Oil tank; 2. Batching box; 21. Batching motor; 22. Second stirring rod; 3. Oil pumping mechanism; 31. Drive housing; 3101. Housing cover; 3102. Sealing plate; 3103. Fixed cylinder; 32. Rotating shaft; 33. Spiral blade; 34. Turntable; 35. Oil pumping cylinder; 351. Working chamber; 352. Auxiliary chamber; 36. Piston; 37. Oil outlet pipe; 38. Second check valve; 39. Drive rod; 310. Drive block; 311. Strip groove; 312. Pin shaft; 313. Paddle; 4. Premixing tank; 41. Liquid outlet; 5. Oil return pipe; 51. Switch valve; 6. Suction pipe; 61. First check valve. Detailed Implementation

[0028] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that in the embodiments of the present invention, all directional indications (such as up-down-left-right-forward-backward...) are only used to explain the relative positional relationship and movement between the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly. The connection can be a direct connection or an indirect connection.

[0031] like Figures 1-4 As shown, a rolling oil additive uniform addition device includes an oil tank 1, a mixing box 2, and an oil extraction mechanism 3. The mixing box 2 is located outside the oil tank 1 and is used to mix base oil and additives into a mixture. The oil extraction mechanism 3 is used to inject the mixture prepared in the mixing box 2 into the oil tank 1.

[0032] Using the above scheme, the additives are pre-mixed with the base oil in the mixing tank 2, so that the additives are completely dissolved in the base oil to form a uniformly mixed high-concentration additive mixture. The mixture is fluid, which makes it convenient to replenish the consumed components in the rolling oil in the oil tank 1. This overcomes the defect of uncontrollable dissolution of solid additives and improves the uniformity of replenishment. By finally adding the high-concentration additive mixture to the rolling oil tank, the additive concentration in the oil tank is kept basically constant.

[0033] Specifically, a premixing tank 4 is provided inside the oil tank 1. A return oil pipe 5 is fixedly connected to the oil tank 1 and extends into the premixing tank 4. The other end of the return oil pipe 5 is connected to the return oil pump in the recycled rolling oil storage device to draw the recycled rolling oil into the premixing tank 4. An oil extraction mechanism 3 is provided inside the premixing tank 4 and is connected to a suction pipe 6. The suction pipe 6 extends into the mixing tank 2. The return oil pipe 5 is connected to the oil extraction mechanism 3 and drives the oil extraction mechanism 3 to draw the mixture in the mixing tank 2 into the premixing tank 4 through the suction pipe 6 during oil return. A liquid outlet hole 41 is provided on the side wall of the premixing tank 4 to discharge the mixed rolling oil in the premixing tank 4 into the oil tank 1.

[0034] Using the above technical solution, a mixing tank 2 is set outside the oil tank 1. In the mixing tank 2, a portion of the base oil and additives are mixed to form a high-concentration mixture, so that the additives are completely dissolved in the base oil to form a uniformly mixed mixture. A premixing tank 4 is set in the oil tank 1. During the process of the return oil pipe 5 transporting the recovered rolling oil to the premixing tank 4, the flowing rolling oil drives the oil pumping mechanism 3 to work and suck the mixture in the mixing tank 2 into the premixing tank 4 through the suction pipe 6. The returned recovered rolling oil is mixed with the mixture containing high-concentration additives to form rolling oil with the required concentration. The mixed rolling oil flows out through the liquid outlet 41 and falls into the oil tank 1 to replenish the rolling oil in the oil tank 1 and replenish the rolling oil consumed in the oil tank 1. The rolling oil in the oil tank 1 is pumped into the cooling system and sprayed onto the aluminum foil in the rolling mill through the oil nozzle for cooling, realizing the cooling of the rolled aluminum foil by the circulation of rolling oil. The additives are pre-mixed with the base oil in the mixing tank 2, ensuring the additives are completely dissolved in the base oil to form a homogeneous, high-concentration additive mixture. This mixture is used only after the additives are fully dissolved, ensuring the additive content reaches the set value and preventing instability caused by undissolved solids. The mixture's fluidity also facilitates the replenishment of rolling oil. The premixing tank 4 mixes the returned rolling oil with the additive-added mixture, promptly replenishing the additives and base oil consumed in the returned rolling oil, thus maintaining a stable additive content in the rolling oil in the tank and ensuring stable rolling results. The recovered rolling oil is the oil collected after cooling the rolled aluminum foil.

[0035] Specifically, the oil extraction mechanism 3 includes a drive housing 31, a rotating shaft 32 rotatably connected inside the drive housing 31, a helical blade 33 connected to the rotating shaft 32, a return oil pipe 5 fixed to the drive housing 31, and the inner cavity of the return oil pipe 5 communicating with the inside of the drive housing 31 to guide the return rolling oil into the drive housing 31, flowing through the helical blade 33 to rotate the rotating shaft 32; the upper end of the rotating shaft 32 extends to the outside of the drive housing 31 and is fixedly connected to a turntable 34; an oil extraction cylinder 35 is fixedly connected to the premixing tank 4, and a piston 36 is slidably connected inside the oil extraction cylinder 35, the piston 36 dividing the oil extraction cylinder 35 into a working chamber 351 and an auxiliary chamber 352. The turntable 34 is driven to the piston 36 so that the piston 36 can reciprocate within the oil extraction cylinder 35 when the turntable 34 rotates; the suction pipe 6 is connected to the side wall of the oil extraction cylinder 35 and the inner cavity of the suction pipe 6 is connected to the working chamber 351; an oil outlet pipe 37 is fixedly connected to the side wall of the oil extraction cylinder 35, the inner cavity of the oil outlet pipe 37 is connected to the working chamber 351, and the end of the oil outlet pipe 37 away from the oil extraction cylinder 35 faces the inner cavity of the premixing tank 4; a first one-way valve 61 is installed on the suction pipe 6 so that the fluid in the suction pipe 6 flows unidirectionally towards the oil extraction cylinder 35, and a second one-way valve 38 is installed on the oil outlet pipe 37 so that the fluid in the oil outlet pipe 37 flows unidirectionally towards the premixing tank 4. By connecting the return oil pipe 5 to the drive housing 31, the recovered rolling oil is introduced into the drive housing 31. When the returned rolling oil flows through the spiral blade 33, it drives the spiral blade 33, causing the rotating shaft 32 to rotate and drive the piston 36 to reciprocate in the oil extraction cylinder 35. This draws the mixture in the mixing tank 2 into the premixing tank 4 and mixes it with the recovered rolling oil. This allows the high concentration of additives in the mixture to compensate for the consumption of additives in the rolling oil, keeping the content of each component in the rolling oil stable. At the same time, the return rolling oil drives the oil extraction mechanism 3 to work, so that the returned rolling oil and the mixture flow into the premixing tank 4 synchronously for mixing. When there is no returned rolling oil, the mixture will not be added to the premixing tank 4, avoiding the return rolling oil or the mixture flowing into the oil tank 1 separately, which would cause fluctuations in the content of the rolling oil in the oil tank 1. This ensures that the returned rolling oil and the mixture are mixed synchronously to form the rolling oil with the set content. In specific operations, a flow valve can be installed on the suction pipe 6 to control the flow rate of the mixture flowing through the suction pipe 6, thereby adjusting the proportion of additives mixed in so that the components of the rolling oil in the premixing tank 4 meet the mixing ratio requirements.

[0036] Specifically, a drive rod 39 is fixedly connected to the piston 36. The drive rod 39 is parallel to the turntable 34. The end of the drive rod 39 away from the piston 36 passes through the auxiliary cavity 352 and is fixedly connected to a drive block 310. The drive block 310 has a strip groove 311, which is arranged perpendicular to the drive rod 39. A pin 312 is fixedly connected to the turntable 34. The pin 312 is offset from the rotation axis of the turntable 34 and is inserted into the strip groove 311. When the turntable 34 rotates, it drives the pin 312, which is offset from the turntable 34, to rotate around the center of the turntable 34. The rotation of the pin 312, in conjunction with the drive block 310, drives the drive rod 39 to move back and forth, which in turn drives the piston 36 to move back and forth. This causes the volume of the working chamber 351 of the oil extraction cylinder 35 to change cyclically, drawing the mixture in the mixing tank 2 into the premixing tank 4.

[0037] Specifically, the lower end of the rotating shaft 32 extends to the bottom of the premixing tank 4, and multiple blades 313 are fixedly connected to the rotating shaft 32. The multiple blades 313 are arranged in a circumferential array on the shaft body of the rotating shaft 32. While the rotating shaft 32 rotates, it drives the blades 313 to rotate. The blades 313 mix the recycled rolling oil and the mixture fed into the premixing tank 4, so that the recycled rolling oil and the mixture are evenly mixed, promoting the premixing effect.

[0038] Specifically, the drive housing 31 includes a housing 3101 and a sealing plate 3102 fixed to the upper end of the housing 3101. The lower end of the housing 3101 is an open structure and the opening faces the premixing tank 4. A fixing cylinder 3103 is fixedly connected to the sealing plate 3102. The rotating shaft 32 is inserted into the fixing cylinder 3103 and rotates with the fixing cylinder 3103. The oil return pipe 5 is fixed on the housing 3101 and located above the spiral blade 33.

[0039] Specifically, the diameter of the housing 3101 near the spiral blade 33 is smaller than the diameter at the point where the housing 3101 connects to the return oil pipe 5. This reduces the surface area through which the recovered rolling oil flows downward along the housing 3101, increasing its flow velocity and thus better driving the spiral blade 33 to rotate.

[0040] Specifically, a switching valve 51 is installed on the return oil pipe 5 to control its opening and closing. Specifically, the switching valve 51 is one of a gate valve, butterfly valve, or stop valve. By controlling the opening and closing of the return oil pipe 5 through the switching valve 51, after the materials in the batching box 2 are prepared, the return oil pipe 5 is opened to guide the recycled rolling oil into the oil extraction mechanism 3, thereby adding additives to the rolling oil to prevent the recycled rolling oil from flowing into the oil tank 1 if the materials in the batching box 2 are not properly prepared.

[0041] Specifically, the mixing tank 2 is equipped with a mixing motor 21, and the output shaft of the mixing motor 21 is fixedly connected to a second stirring rod 22. The second stirring rod 22 extends into the mixing tank 2, and the mixing motor 21 drives the second stirring rod 22 to rotate and stir the materials in the mixing tank 2. When preparing additives, the mixing motor 21 is started to drive the base oil and additive materials in the mixing tank 2 to mix, thereby improving the mixing efficiency of the mixture.

[0042] This invention also provides a method for uniformly adding rolling oil additives, using the aforementioned rolling oil additive uniform addition device, and adding the additives according to the following steps:

[0043] Step S01: Add the supplemented base oil and additives to the mixing tank 2, and stir the base oil and additives in the mixing tank 2 until the additives are completely dissolved and no solids float, so as to form a uniformly dissolved mixture containing a high concentration of additives.

[0044] In step S02, the return oil pipe 5 for conveying and recovering the rolling oil is connected to the oil pumping mechanism 3, and the switch valve 51 on the return oil pipe 5 is opened. The recovered rolling oil is conveyed to the drive housing 31 through the return oil pump (not shown in the figure). The recovered rolling oil flows downward through the drive housing 31 into the premixing tank 4. When the rolling oil flows through the drive housing 31, it drives the rotating shaft 32 to rotate, which in turn drives the piston 36 to reciprocate and draw the mixed liquid material prepared in the batching box 2 into the premixing tank 4.

[0045] Step 03: The mixture drawn into the premixing tank 4 is mixed with the rolling oil recovered in the premixing tank 4. When the rotating shaft 32 rotates, it drives the blade 313 to rotate, so that the materials in the premixing tank 4 are fully mixed.

[0046] In step S04, the rolled oil recovered in the premixing tank 4 is mixed with the mixed liquid and discharged into the oil tank 1 through the liquid outlet 41 to replenish the rolled oil in the oil tank 1.

[0047] Using the above method, this application dissolves the required additives in the mixing tank 2, forming a uniformly mixed liquid with a high concentration of additives. This liquid is then mixed with recycled rolling oil and fed into the oil tank 1 to replenish the lost rolling oil, maintaining a constant additive concentration in the tank and ensuring stable additive content in the rolling oil during the rolling oil cooling and lubrication system's circulation. Furthermore, the recycled rolling oil drives the pumping mechanism 3, causing the returned rolling oil and the mixture to flow synchronously into the premixing tank 4 for mixing. This ensures that the returned rolling oil and the mixture are synchronously mixed to form a set content of rolling oil, maintaining stable rolling oil composition during cooling.

[0048] The parts not covered in this technical solution can be implemented using existing technologies.

[0049] The foregoing has shown and described the basic principles, main features, and characteristics of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention includes the appended claims and their equivalents.

Claims

1. A device for uniformly adding rolling oil additives, characterized in that: It includes an oil tank (1), a mixing tank (2) and an oil pumping mechanism (3). The mixing tank (2) is located outside the oil tank (1). The mixing tank (2) is used to mix base oil and additives into a mixture. The oil pumping mechanism (3) is used to inject the mixture prepared in the mixing tank (2) into the oil tank (1).

2. The rolling oil additive uniform addition device according to claim 1, characterized in that: The oil tank (1) is equipped with a premixing tank (4), and a return oil pipe (5) is fixedly connected to the oil tank (1). The return oil pipe (5) extends into the premixing tank (4). The oil extraction mechanism (3) is installed in the premixing tank (4). A suction pipe (6) is connected to the oil extraction mechanism (3). The suction pipe (6) extends into the mixing tank (2). The return oil pipe (5) is connected to the oil extraction mechanism (3) and drives the oil extraction mechanism (3) to draw the mixture in the mixing tank (2) into the premixing tank (4) through the suction pipe (6) when returning oil. A liquid outlet hole (41) is opened on the side wall of the premixing tank (4). The liquid outlet hole (41) discharges the rolling oil mixed in the premixing tank (4) into the oil tank (1).

3. The rolling oil additive uniform addition device according to claim 2, characterized in that: The oil extraction mechanism (3) includes a drive housing (31), a rotating shaft (32) is rotatably connected inside the drive housing (31), a spiral blade (33) is connected to the rotating shaft (32), the return oil pipe (5) is fixed on the drive housing (31), the inner cavity of the return oil pipe (5) communicates with the inside of the drive housing (31) to guide the return rolling oil to the drive housing (31) and flow through the spiral blade (33) to make the rotating shaft (32) rotate; the upper end of the rotating shaft (32) extends to the outside of the drive housing (31) and is fixedly connected to a turntable (34), an oil extraction cylinder (35) is fixedly connected to the premixing tank (4), a piston (36) is slidably connected inside the oil extraction cylinder (35), the piston (36) divides the oil extraction cylinder (35) into a working chamber (351) and an auxiliary chamber (352), the rotating shaft (35) is rotatably connected to the drive housing (31), and the spiral blade (33) is rotatably connected to the drive housing (31). The disc (34) is driven to the piston (36) to drive the piston (36) to reciprocate within the oil extraction cylinder (35) when the disc (34) rotates; the suction pipe (6) is connected to the side wall of the oil extraction cylinder (35) and the inner cavity of the suction pipe (6) is connected to the working chamber (351); an oil outlet pipe (37) is fixedly connected to the side wall of the oil extraction cylinder (35); the inner cavity of the oil outlet pipe (37) is connected to the working chamber (351); the end of the oil outlet pipe (37) away from the oil extraction cylinder (35) faces the inner cavity of the premixing tank (4); a first one-way valve (61) is installed on the suction pipe (6) to allow the fluid in the suction pipe (6) to flow unidirectionally towards the oil extraction cylinder (35); a second one-way valve (38) is installed on the oil outlet pipe (37) to allow the fluid in the oil outlet pipe (37) to flow unidirectionally towards the premixing tank (4).

4. The rolling oil additive uniform addition device according to claim 3, characterized in that: A drive rod (39) is fixedly connected to the piston (36). The drive rod (39) is arranged parallel to the turntable (34). The drive rod (39) passes through the auxiliary cavity (352) and is fixedly connected to a drive block (310). A strip groove (311) is opened on the drive block (310). The strip groove (311) is arranged perpendicular to the drive rod (39). A pin (312) is fixedly connected to the turntable (34). The pin (312) is offset from the rotation axis (32) of the turntable (34). The pin (312) is inserted into the strip groove (311).

5. The rolling oil additive uniform addition device according to claim 3, characterized in that: The lower end of the rotating shaft (32) extends to the bottom of the premix box (4). Multiple blades (313) are fixedly connected to the rotating shaft (32), and the multiple blades (313) are arranged in a circumferential array on the shaft body of the rotating shaft (32).

6. The rolling oil additive uniform addition device according to claim 3, characterized in that: The drive housing (31) includes a housing (3101) and a sealing plate (3102) fixed to the upper end of the housing (3101). The lower end of the housing (3101) is an open structure and the opening faces the premixing tank (4). A fixed cylinder (3103) is fixedly connected to the sealing plate (3102). The rotating shaft (32) is inserted into the fixed cylinder (3103) and rotates with the fixed cylinder (3103). The return oil pipe (5) is fixed on the housing (3101) and located above the spiral blade (33).

7. The rolling oil additive uniform addition device according to claim 6, characterized in that: The diameter of the housing (3101) near the spiral blade (33) is smaller than the diameter at the point where the housing (3101) connects to the return oil pipe (5).

8. The rolling oil additive uniform addition device according to claim 3, characterized in that: The return oil pipe (5) is equipped with a switch valve (51) for controlling the opening and closing of the return oil pipe (5).

9. The rolling oil additive uniform addition device according to claim 3, characterized in that: The batching box (2) is equipped with a batching motor (21). The output shaft of the batching motor (21) is fixedly connected to a second stirring rod (22). The second stirring rod (22) extends into the batching box (2). The batching motor (21) drives the second stirring rod (22) to rotate and stir the material in the batching box (2).

10. A method for uniformly adding rolling oil additives, characterized in that: Using the rolling oil additive uniform addition device according to any one of claims 3-9, the additive is added according to the following steps: Step S01: Add the supplementary base oil and additives to the mixing tank (2), and stir the base oil and additives in the mixing tank (2) to form a uniformly dissolved mixture; Step S02: Connect the return oil pipe (5) of the recycled rolling oil to the oil pumping mechanism (3), open the switch valve (51) on the return oil pipe (5), and transport the recycled rolling oil through the return oil pump (not shown in the figure) to the drive housing (31) via the return oil pipe (5). The recycled rolling oil flows downward through the drive housing (31) into the premixing tank (4). When the rolling oil flows through the drive housing (31), it drives the rotating shaft (32) to rotate, which in turn drives the piston (36) to reciprocate and draw the mixed liquid material prepared in the batching box (2) into the premixing tank (4). Step 03: The mixture drawn into the premixing tank (4) is mixed with the rolling oil recovered in the premixing tank (4). When the rotating shaft (32) rotates, it drives the paddle (313) to rotate, so that the materials in the premixing tank (4) are fully mixed. In step S04, the rolled oil recovered in the premixing tank (4) is mixed with the mixed liquid and discharged into the oil tank (1) through the liquid outlet (41) to replenish the rolled oil in the oil tank (1).

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