Dry oil addition equipment and its addition method

Abstract

This invention discloses a dry oil adding device and a method for adding oil to the device. The dry oil adding device includes a frame, a dry oil pump, an electromagnetic reversing valve, a proportional relief valve, a shuttle valve, a speed control valve, a pressure boosting valve, and an oil distributor. An oil tank is fixedly connected to the bottom of the frame. The dry oil pump is installed on the top of the frame and connected to the oil tank. The electromagnetic reversing valve has an injection port, a first output port, and a second output port. The proportional relief valve has an oil inlet, an oil outlet, and a control oil port. The oil inlet is connected to the oil outlet of the dry oil pump, the oil outlet is connected to the injection port, and the control oil port is connected to the oil tank. The shuttle valve has two injection ports and a third output port. The speed control valve is located on the first oil supply pipeline. The pressure boosting valve is located between the speed control valve and the first output port. The oil supply pressure and speed can be adjusted according to the needs of different instruments, and the operating threshold of the entire dry oil adding device can be significantly improved, enhancing its adaptability.

Description

Technical Field

[0001] This invention relates to the field of hot rolling machinery and equipment technology, and in particular to a dry oil adding device and its adding method. Background Technology

[0002] In mechanical equipment, especially in hot rolling mill production lines, lubrication plays a crucial role. If mechanical transmission equipment is not lubricated or is poorly lubricated, it will be damaged in a short time, causing incalculable losses. Therefore, equipment lubrication is very important in the daily maintenance of mechanical equipment. Currently, the common equipment lubrication can be divided into two main categories: automatic lubrication and manual lubrication. This invention mainly focuses on manual lubrication. Currently, there are three common manual lubrication methods: pneumatic pump, electric pump and hand pump. The lubrication steps are as follows: (1) Add dry grease to the dry grease pump; (2) Move the oil pump or hand pump to the usage position; (3) Lubricate the designated lubrication position; (4) Place the pump in the designated position after adding the grease. Currently, the pneumatic pump grease replenishment method mainly involves transporting the oil drum through a triangular support trolley. The dry grease pump is placed inside the oil drum. During the process, it must be used in conjunction with the oil drum. The dry grease in the drum cannot be effectively utilized, resulting in waste. At the same time, the dry grease drum is a hazardous waste and recycling is more complicated. In addition, the pneumatic pump cannot inject pressure higher than its rated power during the grease replenishment process, which makes it unable to meet the lubrication needs of some equipment. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a dry oil adding device that can adjust the oil supply pressure or oil supply speed according to actual needs to meet the lubrication requirements of different equipment.

[0004] The present invention also proposes an addition method using the above-mentioned dry oil addition equipment.

[0005] A dry oil adding device according to a first aspect embodiment of the present invention includes:

[0006] The frame has casters at the bottom, and a fuel tank is fixedly connected to the bottom of the frame;

[0007] A dry oil pump is installed on the top of the vehicle frame, and the oil inlet of the dry oil pump is connected to the oil tank;

[0008] The electromagnetic directional valve is equipped with an injection port, a first output port, and a second output port.

[0009] The proportional relief valve is provided with an oil inlet, an oil outlet and a control oil port. The oil inlet is connected to the oil outlet of the dry oil pump, the oil outlet is connected to the injection port and the control oil port is connected to the oil tank.

[0010] The shuttle valve is provided with two oil inlets and a third output port. A first oil supply line and a second oil supply line are respectively provided between the two oil inlets, the first output port, and the second output port.

[0011] The speed control valve is installed on the first oil delivery pipeline;

[0012] A booster valve is disposed between the speed control valve and the first output port;

[0013] The oil separator is connected to the third output port. The oil separator is connected to an oil injection pipe, and the oil separator delivers dry oil directly to the instrument through the oil injection pipe.

[0014] The dry oil adding device according to the embodiments of the present invention has at least the following beneficial effects: the oil supply pressure and oil supply speed can be adjusted according to different equipment requirements, and the operating threshold of the entire dry oil adding device can be greatly improved, thereby enhancing its adaptability.

[0015] According to some embodiments of the present invention, tube reels are provided on both sides of the frame, and the oil injection pipe is wound around the tube reels.

[0016] According to some embodiments of the present invention, the dry oil pump includes:

[0017] The outer tube has a first inner cavity and a second inner cavity arranged from top to bottom. The inner diameter of the first inner cavity is smaller than the inner diameter of the second inner cavity, so that a first step is provided between the first inner cavity and the second inner cavity.

[0018] An inner tube extends from top to bottom and is housed within an outer tube. The inner tube comprises a first section and a second section extending from top to bottom. The outer diameter of the first section is equal to the inner diameter of the first inner cavity, and the outer diameter of the second section is equal to the inner diameter of the second inner cavity, and they slide in fit with the second inner cavity. The length of the second section is less than the length of the second inner diameter. A spring is provided between the end of the second section and the first step, and the spring is sleeved outside the first section.

[0019] The limiting member has a third inner cavity and a fourth inner cavity arranged from top to bottom. The limiting member is fixed to the lower inner side of the second inner cavity. The inner diameter of the third inner cavity is larger than the inner diameter of the fourth inner cavity, so that a second step is provided between the third inner cavity and the fourth inner cavity.

[0020] The sealing component is fixedly connected at its upper end to the lower end of the second pipe fitting. The sealing component is provided with a flow guide groove through it. The lower end of the sealing component can abut against the second step to block the flow guide groove; or the lower end of the sealing component is separated from the second step so that the internal space of the inner pipe can communicate with the oil tank through the flow guide groove.

[0021] According to some embodiments of the present invention, the lower end of the sealing member is tapered, and the second step is tapered and can match the lower end of the sealing member.

[0022] According to some embodiments of the present invention, the fuel tank has a built-in liquid level sensor, the vehicle frame is equipped with an alarm, and the liquid level sensor and the alarm are electrically connected to control the start and stop of the alarm.

[0023] According to some embodiments of the present invention, when the liquid level in the oil tank is lower than or equal to the liquid level S1, the lower end of the sealing member abuts against the second step, and the liquid level sensor is positioned at S2, which is located below S1.

[0024] According to some embodiments of the present invention, the oil separator includes:

[0025] The housing has a rotating cavity, and the side wall of the housing has a plurality of oil injection holes arranged side by side, the oil injection holes being connected to the oil injection pipe;

[0026] A shaft core is inserted into the rotating cavity, and the shaft core and the rotating cavity are rotatably connected. Along the axial direction of the shaft core, a first oil passage is provided through the shaft core. Along the radial direction of the shaft core, a plurality of second oil passages are provided on the shaft core. One end of the second oil passage passes through the side wall of the shaft core, and the other end is connected to the first oil passage. The plurality of second oil passages are staggered.

[0027] In this case, one end of the first oil circuit is blocked, and the other end is connected to the third output port;

[0028] The number of the second oil passage and the number of the oil injection holes are the same, and the shaft can pivot so that the second oil passage and the oil injection holes can correspond one-to-one and be connected.

[0029] According to some embodiments of the present invention, a stepper motor is fixedly connected to one end of the housing, and a third oil supply line is inserted into the other end. The drive shaft of the stepper motor extends into the rotating cavity and is fixedly connected to the end of the shaft core. A coupling is built into the rotating cavity, and the coupling is connected to the drive shaft of the stepper motor. The third oil supply line is connected to the shuttle valve.

[0030] According to some embodiments of the present invention, the oil inlet connected to the second oil pipeline is provided with a one-way valve.

[0031] The method for adding according to a second aspect embodiment of the present invention includes the following steps:

[0032] Step 1: Move the frame to the vicinity of the instrument that needs lubrication and connect the lubrication hose to the lubrication port of the instrument, then proceed to Step 2;

[0033] Step 2: Connect the solenoid directional valve to the first or second output port according to the required oil pressure and flow rate of the corresponding instrument, and proceed with step 2.1 or step 2.2;

[0034] Step 2.1: If the required oil pressure or flow rate of the instrument is less than or equal to the rated output oil pressure or rated output flow rate of the dry oil pump, switch the solenoid reversing valve to the second output port to connect the dry oil pump and the second oil pipeline, and proceed to step 3.

[0035] Step 2.2: If the required oil pressure or flow rate of the instrument is greater than the rated output oil pressure or rated output flow rate of the dry oil pump, switch the solenoid reversing valve to the first output port so that the dry oil pump and the first oil delivery pipeline are connected, and proceed to step 2.2.1.

[0036] Step 2.2.1: Adjust the pressure boosting valve to the required oil pressure according to the instrument, and adjust the rated flow rate of the speed control valve according to the required flow rate of the instrument, and proceed to step 3;

[0037] Step 3: Open the shuttle valve to allow the dry oil in the tank to pass through the shuttle valve into the oil separator, and then be injected into the instrument by the oil separator.

[0038] The oil addition method according to the embodiments of the present invention has at least the following beneficial effects: the oil supply pressure and oil supply speed can be adjusted according to the needs of different instruments, and the operating threshold of the entire dry oil addition equipment can be greatly improved, thereby enhancing adaptability.

[0039] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0041] Figure 1 This is a schematic diagram of a dry oil adding device according to an embodiment of the present invention;

[0042] Figure 2 This is a schematic diagram of the dry oil output circuit of the dry oil adding device according to an embodiment of the present invention;

[0043] Figure 3 A schematic diagram of the dry oil pump in the dry oil adding device according to an embodiment of the present invention;

[0044] Figure 4 This is a schematic diagram of the oil separator in the dry oil adding device according to an embodiment of the present invention.

[0045] 100. Frame; 110. Casters; 120. Fuel tank; 121. Liquid level sensor; 130. Tube coil wheel;

[0046] 200. Dry oil pump; 210. Outer pipe; 211. First inner cavity; 212. Second inner cavity; 213. First step; 220. Inner pipe; 221. First pipe section; 222. Second pipe section; 223. Spring; 230. Limiting component; 231. Third inner cavity; 232. Fourth inner cavity; 233. Second step; 240. Sealing component; 241. Flow guide groove;

[0047] 300, Solenoid directional valve; 310, Inlet; 320, First outlet; 321, First oil supply line; 330, Second outlet; 331, Second oil supply line;

[0048] 400, Proportional relief valve; 410, Oil inlet; 420, Oil outlet; 430, Control oil port;

[0049] 500, shuttle valve; 510, oil inlet; 520, third output port; 521, third oil supply line;

[0050] 600. Speed ​​control valve;

[0051] 700. Pressure boosting valve;

[0052] 800, oil distributor; 810, housing; 811, rotating cavity; 812, oil injection hole; 820, shaft core; 821, first oil passage; 822, second oil passage; 830, stepper motor; 831, coupling;

[0053] 900. Oil injection pipe; Detailed Implementation

[0054] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0055] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0056] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0057] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0058] Reference Figure 1 and Figure 2 The dry oil adding device of this invention includes a frame 100, a dry oil pump 200, an electromagnetic reversing valve 300, a proportional overflow valve 400, a shuttle valve 500, a speed regulating valve 600, a booster valve 700, and an oil distributor 800. The frame 100 is equipped with casters 110 at its bottom, and an oil tank 120 is fixedly connected to the lower part of the frame 100. The dry oil pump 200 is mounted on the top of the frame 100, and its inlet is connected to the oil tank 120. The electromagnetic reversing valve 300 has an injection port 310, a first output port 320, and a second output port 330. The proportional overflow valve 400 has an inlet port 410, an outlet port 420, and a control port 430. The inlet port 410 and the dry oil pump 200... The oil outlet is connected to the oil outlet 420 and the injection port 310, and the control oil port 430 is connected to the oil tank 120; the shuttle valve 500 is provided with two oil injection ports 510 and a third output port 520. A first oil delivery pipeline 321 and a second oil delivery pipeline 331 are respectively provided between the two oil injection ports 510 and the first output port 320 and the second output port 330; the speed control valve 600 is provided on the first oil delivery pipeline 321; the pressure boosting valve 700 is provided between the speed control valve 600 and the first output port 320; the oil distributor 800 is connected to the third output port 520, and the oil distributor 800 is connected to the oil injection pipe 900. The oil distributor 800 directly delivers dry oil to the instrument through the oil injection pipe 900.

[0059] The frame 100 is used to transport the entire dry oil adding equipment to the vicinity of different equipment to be refueled. The dry oil pump 200 is directly immersed in the dry oil in the oil tank 120 and is used to extract dry oil. The shuttle valve 500 is used to receive dry oil from the first oil supply line 321 or the second oil supply line 331 and deliver the dry oil to the oil distributor 800. Finally, the dry oil is input to different equipment by the multiple oil injection pipes 900 on the oil distributor 800.

[0060] Specifically, the method for adding dry oil using the dry oil adding device according to an embodiment of the present invention includes the following steps:

[0061] Step 1: Move the frame 100 to the vicinity of the instrument that needs lubrication, and connect the oil filling pipe 900 to the instrument's oil filling port, then proceed to Step 2;

[0062] Step 2: Connect the solenoid directional valve 300 to the first output port 320 or the second output port 330 according to the required oil pressure and flow rate of the corresponding instrument, and proceed with step 2.1 or step 2.2;

[0063] Step 2.1: If the required oil pressure or flow rate of the instrument is less than or equal to the rated output oil pressure or rated output flow rate of the dry oil pump 200, switch the solenoid reversing valve 300 to the second output port 330 so that the dry oil pump 200 and the second oil supply line 331 are connected, and proceed to step 3.

[0064] Step 2.2: If the required oil pressure or flow rate of the instrument is greater than the rated output oil pressure or rated output flow rate of the dry oil pump 200, switch the solenoid reversing valve 300 to the first output port 320 so that the dry oil pump 200 and the first oil delivery line 321 are connected, and proceed to step 2.2.1.

[0065] Step 2.2.1: Adjust the pressure boosting factor of the pressure boosting valve 700 according to the required oil pressure of the instrument, and adjust the rated flow rate of the speed regulating valve 600 according to the required flow rate of the instrument, and proceed to step 3;

[0066] Step 3: Open shuttle valve 500 to allow the dry oil in oil tank 120 to enter oil distributor 800 through shuttle valve 500, and then be injected into the instrument by oil distributor 800.

[0067] In step 2.2 above, which is the "low pressure" control process of this dry oil adding equipment, specifically, the solenoid directional valve 300 switches to the 2DT passage, so that the second oil supply line 331 is connected and the first oil supply line 321 is closed. The dry oil pump 200 draws dry oil from the oil tank 120. The dry oil enters the shuttle valve 500 directly through the second oil supply line and finally flows out from the oil distributor 800. Before passing through the solenoid directional valve 300, the dry oil will first pass through the proportional relief valve 400 and the working pressure is set by the proportional relief valve 400. Specifically, the working pressure set by the proportional relief valve 400 is less than or equal to the rated working pressure of the dry oil pump 200.

[0068] In steps 2.2 and 2.2.1 above, which pertain to the "high pressure" control process of this dry oil adding equipment, specifically, the solenoid directional valve 300 switches to the 1DT passage, connecting the first oil supply line 321 and closing the second oil supply line 331. The dry oil pump 200 draws dry oil from the oil tank 120. The dry oil enters the shuttle valve 500 directly through the first oil supply line and finally flows out from the oil distributor 800. When the dry oil passes through the proportional relief valve 400, the proportional relief valve 400 will be in a fully open state, allowing the dry oil to enter the solenoid directional valve 300 at the rated pressure of the dry oil pump 200, and then enter the booster valve 700 for multiplied pressurization. The speed control valve 600 then adjusts the oil supply flow rate. At this time, the flow rate can only be changed at a rate lower than the rated flow rate of the dry oil pump 200, which means that a high-pressure, low-speed oil supply speed can be achieved.

[0069] It is important to emphasize that the pressure boosting valve 700 typically includes a pressure boosting chamber, a low-pressure chamber, a piston, seals, and inlets / outlets. The piston separates the pressure boosting chamber and the low-pressure chamber, and the seals on the piston ensure that the liquid in the two chambers does not leak into each other. When low-pressure liquid enters from the low-pressure chamber, it pushes the piston towards the pressure boosting chamber. Due to the squeezing action of the piston, the pressure of the liquid in the pressure boosting chamber increases.

[0070] The speed control valve 600 is a combination valve consisting of a differential pressure reducing valve and a throttle valve connected in series. Its working principle is to ensure that the pressure difference across the throttle valve is constant through the automatic adjustment of the differential pressure reducing valve. Since the flow rate of the throttle valve mainly depends on the throttle orifice area and the pressure difference across it, the flow rate through the speed control valve 600 can remain stable and is not affected by factors such as load changes when the throttle orifice area remains unchanged and the pressure difference is constant.

[0071] In summary, the dry oil adding device of the present invention can adjust the oil supply pressure and oil supply speed according to different instrument requirements, and can significantly improve the operating threshold of the entire dry oil adding device and improve adaptability.

[0072] According to some embodiments of the present invention, the oil inlet 510 connected to the second oil pipeline 331 is provided with a check valve.

[0073] As described above, the dry oil passes through the oil separator 800 and enters different instruments. The purpose of the oil separator 800 is to switch the oil supply between different instruments. Accordingly, in the embodiments of the present invention, referring to... Figure 4The oil distributor 800 includes a housing 810 and a shaft 820. The housing 810 is provided with a rotating cavity 811, and multiple oil injection holes 812 are arranged side by side on the side wall of the housing 810. The oil injection holes 812 are connected to oil injection pipes 900. The shaft 820 is inserted into the rotating cavity 811, and the shaft 820 and the rotating cavity 811 are rotatably connected. Along the axial direction of the shaft 820, a first oil passage 821 is provided through the shaft 820. Along the radial direction of the shaft 820, the shaft 820... The shaft is equipped with multiple second oil passages 822. One end of each second oil passage 822 passes through the side wall of the shaft core 820, and the other end is connected to the first oil passage 821. The multiple second oil passages 822 are staggered. One end of the first oil passage 821 is blocked, and the other end is connected to the third output port 520. The number of second oil passages 822 and oil injection holes 812 is the same. The shaft core 820 can pivot so that the second oil passages 822 and oil injection holes 812 can correspond one-to-one and be connected.

[0074] In practical use, different oil injection holes 812 are connected to oil injection pipes 900 connected to different instruments. After lubrication of one instrument, the shaft core 820 can be rotated directly to connect different second oil passages 822 with the corresponding oil injection holes 812. This allows the dry oil in the first oil passage 821 to enter different instruments through the replaced oil injection pipes 900 and lubricate those instruments. To ensure the normal rotation of the shaft core 820 inside the housing 810, preferably, a stepper motor 830 is fixedly connected to one end of the housing 810, and a third oil supply pipe 521 is inserted into the other end. The drive shaft of the stepper motor 830 extends into the rotating cavity 811 and is fixedly connected to the end of the shaft core 820. The rotating cavity 811 contains a coupling 831, which is connected to the drive shaft of the stepper motor 830. The third oil supply pipe 521 is connected to the shuttle valve 500. The drive shaft of the stepper motor 830 is stabilized by the coupling 831, and the stepper motor 830 can rotate the shaft at a fixed angle, so that the oil injection hole 812 and the second oil passage 822 can be accurately positioned.

[0075] In addition, in order to facilitate the storage of multiple oil injection pipes 900, tube reel wheels 130 are provided on both sides of the frame 100, and the oil injection pipes 900 are wound around the tube reel wheels 130.

[0076] According to some embodiments of the present invention, with reference to Figure 3The dry oil pump 200 includes an outer pipe 210, an inner pipe 220, a limiting member 230, and a sealing member 240. The outer pipe 210 has a first inner cavity 211 and a second inner cavity 212 arranged from top to bottom. The inner diameter of the first inner cavity 211 is smaller than the inner diameter of the second inner cavity 212, so that a first step 213 is provided between the first inner cavity 211 and the second inner cavity 212. The inner pipe 220 is arranged from top to bottom and is built into the outer pipe 210. The inner pipe 220 includes a first pipe section 221 and a second pipe section 222 arranged from top to bottom. The outer diameter of the first pipe section 221 is equal to the inner diameter of the first inner cavity 211, and the outer diameter of the second pipe section 222 is equal to the inner diameter of the second inner cavity 212 and is in sliding fit with the second inner cavity 212. The length of the second pipe section 222 is less than the length of the second inner cavity. The end of the second pipe section 222... A spring 223 is provided between the first section 221 and the first step 213, and the spring 223 is sleeved outside the first pipe section 221; the limiting member 230 is provided with a third inner cavity 231 and a fourth inner cavity 232 from top to bottom, and the limiting member 230 is fixed to the inner side of the lower end of the second inner cavity 212. The inner diameter of the third inner cavity 231 is larger than the inner diameter of the fourth inner cavity 232, so that a second step 233 is provided between the third inner cavity 231 and the fourth inner cavity 232; the sealing member 240 is fixedly connected at its upper end to the lower end of the second pipe, and the sealing member 240 is provided with a guide groove 241 through it. The lower end of the sealing member 240 can abut against the second step 233 to seal the guide groove 241; or the lower end of the sealing member 240 is separated from the second step 233, so that the internal space of the inner pipe 220 is connected to the oil tank 120 through the guide groove 241.

[0077] In practical use, this part of the dry oil pump 200 is used to be immersed in the oil tank 120 and works with the pump in the dry oil pump 200 to extract dry oil. When the inner tube 220 moves downward under the action of the spring 223 and the sealing member 240 and the second step 233 come into contact, a metal seal is formed between the sealing member and the limiting member 230. At this time, there is still a small amount of dry oil in the entire oil tank 120, which can ensure that the dry oil pump 200 will not be dry-pumped, realize the long-term stable operation of the dry oil pump 200, and improve the service life of the entire dry oil adding equipment. On the other hand, if the oil tank 120 is full of dry oil, the oil pressure will push the sealing member 240 up, so that there is a gap between the sealing member 240 and the second step 233. After the dry oil enters through the gap, it will be drawn into the inner tube 220 by the dry oil pump 200 through the guide groove 241 and finally flow out through the upper end of the outer tube 210.

[0078] In a preferred embodiment, the lower end of the sealing member 240 is tapered, and the second step 233 has a tapered surface that matches the lower end of the sealing member 240. The tapered lower end surface can mate with the second step 233 to achieve a metal seal. At the same time, the tapered shape can better guide the sealing member 240, so that the sealing member 240 can fit snugly against the second step 233 to achieve contact.

[0079] Meanwhile, in order to further reduce the risk of dry pumping, the fuel tank 120 is equipped with a liquid level sensor 121, and the frame 100 is equipped with an alarm. The liquid level sensor 121 and the alarm are electrically connected to control the start and stop of the alarm. Preferably, when the liquid level in the fuel tank 120 is lower than or equal to the liquid level S1, the lower end of the sealing member 240 and the second step 233 abut against each other. The liquid level sensor 121 is set at position S2, which is below S1.

[0080] In addition, an extra liquid level sensor 121 can be installed at the top of the fuel tank 120 to prevent fuel from overflowing when refueling. This liquid level sensor 121 is also electrically connected to the alarm for warning purposes.

[0081] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A dry oil adding device, characterized in that, include: The frame (100) is provided with casters (110) at the bottom, and an oil tank (120) is fixedly connected to the bottom of the frame (100); A dry oil pump (200) is installed on the top of the frame (100), and the oil inlet of the dry oil pump (200) is connected to the oil tank (120); The electromagnetic directional valve (300) is provided with an injection port (310), a first output port (320), and a second output port (330); The proportional overflow valve (400) is provided with an oil inlet (410), an oil outlet (420) and a control oil port (430). The oil inlet (410) is connected to the oil outlet of the dry oil pump (200), the oil outlet (420) is connected to the injection port (310), and the control oil port (430) is connected to the oil tank (120). The shuttle valve (500) is provided with two oil inlets (510) and a third output port (520). A first oil supply line (321) and a second oil supply line (331) are respectively provided between the two oil inlets (510), the first output port (320), and the second output port (330). A speed control valve (600) is installed on the first oil supply line (321); A booster valve (700) is disposed between the speed control valve (600) and the first output port (320); The oil separator (800) is connected to the third output port (520). The oil separator (800) is connected to an oil injection pipe (900). The oil separator (800) delivers dry oil directly to the instrument through the oil injection pipe (900). The dry oil pump (200) includes: The outer tube (210) is provided with a first inner cavity (211) and a second inner cavity (212) from top to bottom. The inner diameter of the first inner cavity (211) is smaller than the inner diameter of the second inner cavity (212) so that a first step (213) is provided between the first inner cavity (211) and the second inner cavity (212). An inner tube (220) is installed from top to bottom, and is built inside the outer tube (210). The inner tube (220) includes a first tube segment (221) and a second tube segment (222) installed from top to bottom. The outer diameter of the first tube segment (221) is equal to the inner diameter of the first inner cavity (211), and the outer diameter of the second tube segment (222) is equal to the inner diameter of the second inner cavity (212) and slides with the second inner cavity (212). The length of the second tube segment (222) is less than the length of the second inner cavity. A spring (223) is provided between the end of the second tube segment (222) and the first step (213). The spring (223) is sleeved outside the first tube segment (221). The limiting member (230) is provided with a third inner cavity (231) and a fourth inner cavity (232) from top to bottom. The limiting member (230) is fixed to the inner side of the lower end of the second inner cavity (212). The inner diameter of the third inner cavity (231) is larger than the inner diameter of the fourth inner cavity (232) so that a second step (233) is provided between the third inner cavity (231) and the fourth inner cavity (232). A sealing component (240) is fixedly connected at its upper end to the lower end of the second pipe section. The sealing component (240) is provided with a flow guide groove (241) through it. The lower end of the sealing component (240) can abut against the second step (233) to block the flow guide groove (241); or the lower end of the sealing component (240) is separated from the second step (233) so that the internal space of the inner pipe (220) can communicate with the oil tank (120) through the flow guide groove (241).

2. The dry oil adding device according to claim 1, characterized in that, The frame (100) is provided with tube reels (130) on both sides, and the oil injection pipe (900) is wound around the tube reels (130).

3. The dry oil adding device according to claim 1, characterized in that, The lower end of the sealing element (240) is conical, and the second step (233) is conical and can match the lower end of the sealing element (240).

4. The dry oil adding device according to claim 1, characterized in that, The fuel tank (120) has a built-in liquid level sensor (121), and the frame (100) is equipped with an alarm. The liquid level sensor (121) and the alarm are electrically connected to control the start and stop of the alarm.

5. The dry oil adding device according to claim 4, characterized in that, When the liquid level in the oil tank (120) is lower than or equal to the liquid level S1, the lower end of the sealing member (240) abuts against the second step (233), and the liquid level sensor (121) is positioned at S2, which is below S1.

6. The dry oil adding device according to claim 1, characterized in that, The oil separator (800) includes: The housing (810) is provided with a rotating cavity (811), and a plurality of oil injection holes (812) are arranged side by side on the side wall of the housing (810), and the oil injection holes (812) are connected to the oil injection pipe (900); A shaft core (820) is inserted into the rotating cavity (811). The shaft core (820) and the rotating cavity (811) are rotatably connected. Along the axial direction of the shaft core (820), a first oil passage (821) is provided through the shaft core (820). Along the radial direction of the shaft core (820), a plurality of second oil passages (822) are provided on the shaft core (820). One end of the second oil passage (822) passes through the side wall of the shaft core (820), and the other end is connected to the first oil passage (821). The plurality of second oil passages (822) are staggered. One end of the first oil passage (821) is blocked, and the other end is connected to the third output port (520); The number of the second oil passage (822) and the oil injection hole (812) are the same, and the shaft (820) can pivot so that the second oil passage (822) and the oil injection hole (812) can correspond one-to-one and be connected.

7. The dry oil adding device according to claim 6, characterized in that, One end of the housing (810) is fixedly connected to a stepper motor (830), and the other end is fitted with a third oil supply line (521). The drive shaft of the stepper motor (830) extends into the rotating cavity (811) and is fixedly connected to the end of the shaft core (820). The rotating cavity (811) contains a coupling (831), which is connected to the drive shaft of the stepper motor (830). The third oil supply line (521) is connected to the shuttle valve (500).

8. The dry oil adding device according to claim 1, characterized in that, The oil inlet (510) connected to the second oil pipeline (331) is equipped with a check valve.

9. A method for adding, characterized in that, The dry oil adding device according to any one of claims 1 to 8 includes the following steps: Step 1: Move the frame (100) to the vicinity of the instrument that needs lubrication and connect the oil filling pipe (900) to the instrument's oil filling port, then proceed to Step 2; Step 2: Connect the solenoid directional valve (300) to the first output port (320) or the second output port (330) according to the required oil pressure and flow rate of the corresponding instrument, and proceed with step 2.1 or step 2.2; Step 2.1: If the required oil pressure or flow rate of the instrument is less than or equal to the rated output oil pressure or rated output flow rate of the dry oil pump (200), then switch the solenoid reversing valve (300) to the second output port (330) so that the dry oil pump (200) and the second oil pipeline (331) are connected, and proceed to step 3. Step 2.2: If the required oil pressure or flow rate of the instrument is greater than the rated output oil pressure or rated output flow rate of the dry oil pump (200), then switch the solenoid reversing valve (300) to the first output port (320) so that the dry oil pump (200) and the first oil delivery pipeline (321) are connected, and proceed to step 2.2.1; Step 2.2.1: Adjust the pressure boosting factor of the boosting valve (700) according to the required oil pressure of the instrument, and adjust the rated flow rate of the speed regulating valve (600) according to the required flow rate of the instrument, and proceed to step 3; Step 3: Open the shuttle valve (500) to allow the dry oil in the oil tank (120) to pass through the shuttle valve (500) into the oil separator (800), and then be injected into the instrument by the oil separator (800).

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