Separating type oil injection pump

Abstract

The utility model relates to the technical field of filling, in particular to a separating type oil filling pump which comprises a fixing sleeve, a first oil inlet and a first oil outlet which are communicated with a movable cavity are formed in the surface of the fixing sleeve, the movable cavity is communicated with a pumping and discharging cavity through an oil pumping and discharging outlet, and a rotating rod is movably assembled in the movable cavity. The second driving part drives the rotating rod to rotate, so that an opening in one end of the oil injection channel is communicated with the first oil inlet, an opening in the other end of the oil injection channel is communicated with the oil pumping and discharging opening, and meanwhile, the first oil pumping and discharging device is started, so that the oil pumping and discharging cavity generates negative pressure, and tobacco tar is sucked into the oil injection channel from the first oil inlet; or the opening in one end of the oil injection channel is communicated with the first oil outlet, the opening in the other end of the oil injection channel is communicated with the oil pumping and discharging opening, the first oil pumping and discharging device is started, the pumping and discharging cavity generates positive pressure, and the tobacco tar is discharged to the first oil outlet from the oil injection channel. An existing metering pump is optimized as a whole, so that the advantages of efficient cleaning and high-precision compatibility with various types of tobacco tar are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of filling, in particular to a separate oil filling pump. Background Art

[0002] An electronic atomizer is a device that atomizes tobacco liquid using high temperature, high pressure, or ultrasound. After the liquid is consumed, it needs to be refilled. Existing electronic atomizers typically use an automated refill mechanism. This system uses a supply pipe to transfer the liquid from a supply barrel to a separate metering pump, typically a positive displacement pump. A motor drives a ceramic piston rod, which presses out a predetermined volume within a ceramic sleeve, allowing the liquid to be discharged from the sleeve and then injected into the atomizer through a syringe needle.

[0003] Currently, the oil inlet and outlet of the existing metering pump are set on the outer surface of the ceramic sleeve, and the tobacco oil will enter the interior of the ceramic sleeve. However, since the tobacco oil in the cavity cannot be completely rinsed out during the cleaning process, different flavors of tobacco oils will bleed into each other. Secondly, when metered supply is made, gas is formed in the ceramic cavity, thereby forming bubbles, which will result in the inability to quantitatively supply the preset volume of liquid in the ceramic cavity and affect the injection accuracy. Summary of the Invention

[0004] In view of the above-mentioned deficiencies of the prior art, the purpose of the present invention is to optimize the existing metering pump, flush the tobacco oil in its cavity and quickly and reliably discharge the bubbles in the cavity out of the cavity, thereby achieving the advantages of efficient cleaning, high precision and compatibility with various types of tobacco oils.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: a separate oil injection pump, comprising:

[0006] The fixed sleeve has a pumping cavity and a movable cavity provided therein, and a first oil inlet and a first oil outlet connected to the movable cavity are provided on the surface of the fixed sleeve, and the movable cavity and the pumping cavity are connected through the pumping cavity;

[0007] A rotating rod, wherein the rotating rod is movably mounted in the movable cavity and is provided with an oil injection channel running through the rotating rod;

[0008] a first pumping device, wherein an output end of the first pumping device is connected to the pumping cavity;

[0009] a second driving portion, the second driving portion driving the rotating rod to rotate;

[0010] The second driving unit drives the rotating rod to rotate so that one end opening of the oil filling channel is connected to the first oil inlet, and the other end opening of the oil filling channel is connected to the oil extraction and discharge port. At the same time, the first extraction and discharge device is started and the extraction and discharge cavity generates a negative pressure and sucks the smoke oil from the first oil inlet into the oil filling channel; the second driving unit drives the ceramic rotating rod to rotate so that one end opening of the oil filling channel is connected to the first oil outlet, and the other end opening of the oil filling channel is connected to the oil extraction and discharge port. The first extraction and discharge device is started and the extraction and discharge cavity generates a positive pressure and discharges the smoke oil from the oil filling channel to the first oil outlet.

[0011] Furthermore, the fixed sleeve is also provided with a fixed cavity, which is arranged perpendicular to the pumping cavity and is connected to the pumping cavity, wherein the fixed cavity is detachably equipped with a hollow special-shaped sleeve, and the hollow special-shaped sleeve is provided with a second oil inlet connected to the first oil inlet and a second oil outlet connected to the first oil outlet. The interior of the hollow special-shaped sleeve constitutes a movable cavity, and the oil pumping port is arranged on the hollow special-shaped sleeve.

[0012] Furthermore, the second oil inlet, the second oil outlet, and the oil pumping and draining ports on the hollow special-shaped sleeve are evenly distributed at 120 degrees along the central axis of the hollow special-shaped sleeve.

[0013] Furthermore, the openings at both ends of the oil injection channel are distributed at an angle of 120 degrees along the axis of the rotating rod, and one end of the rotating rod extends out of the fixing sleeve and is connected to the second driving part.

[0014] Furthermore, a ceramic sleeve is installed in the pumping chamber, and the first pumping device includes a screw motor that moves horizontally. The output end of the screw motor is equipped with a ceramic piston rod, and the screw motor drives the ceramic piston rod to move back and forth in the ceramic sleeve.

[0015] Furthermore, it also includes a fixed bracket assembly, which includes a fixed base plate and a fixed plate. The fixed plate is installed on the surface of the fixed base plate, and the surface of the fixed plate is provided with a first limiting groove for fitting the fixed sleeve.

[0016] Furthermore, the first pumping device also includes a limiting device and a screw motor fixing plate. The limiting device includes a U-shaped limiting bracket, a piston rod connecting piece, and a fixed clamping ring. The screw motor is fixed to the surface of the fixed base plate through the screw motor fixing plate, and the output end of the screw motor passes through the limiting bracket and is equipped with a piston rod connecting piece, and the movable rod connecting piece is connected to the ceramic piston rod through a fixed clamping ring, and a second limiting groove is provided on the surface of the fixed base plate, and a limiting linear guide rail is installed on the second limiting groove, and the limiting bracket is movably equipped on the limiting linear guide rail through a slider.

[0017] Furthermore, the second driving part includes a stepping motor, the output end of the stepping motor is connected to the first bevel gear, and one end of the rotating rod extending out of the fixed sleeve is equipped with a second bevel gear meshing with the first bevel gear.

[0018] Furthermore, the second driving unit also includes a motor fixing plate, and the stepping motor is fixed on the fixing plate through the motor fixing plate.

[0019] The beneficial effect of the present invention is that during the process of extracting and discharging oil, the oil does not directly enter the extraction chamber, but is transferred through the oil filling channel of the rotating rod. This design prevents the oil from flowing directly through the extraction chamber, thereby reducing the accumulation of oil stains in the extraction chamber. When the equipment needs to be cleaned, since the oil mainly remains in the first oil inlet, the first oil outlet, and the oil filling channel, these areas can be cleaned more easily and thoroughly, avoiding the problem of odor cross-talk between oils of different flavors and improving the hygiene of the equipment. At the same time, by controlling the movement of the rotating rod and the working state of the first extraction device, the connection state between the oil filling channel and the oil inlet, oil outlet, and extraction port can be quickly changed. This dynamic connection mechanism enables the bubbles in the cavity to be effectively discharged as the oil flows, thereby avoiding the influence of bubbles on the accuracy of quantitative supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the overall structure of an embodiment of the utility model from another perspective;

[0022] Figure 3 It is a partial cross-sectional schematic diagram of the overall structure of an embodiment of the present utility model.

[0023] Figure 4 It is a partial enlarged cross-sectional schematic diagram of an embodiment of the present utility model.

[0024] Description of Figure Numbers:

[0025] 1. Fixed base plate; 11. Second limiting groove; 2. Fixed sleeve; 21. Pumping and exhaust chamber; 22. Fixed chamber; 23. First oil inlet; 24. First oil outlet; 3. Fixed plate; 31. First limiting groove; 4. Ceramic sleeve; 5. Ceramic piston rod; 6. First pumping and exhaust device; 61. Screw motor; 62. Screw motor fixing plate; 63. Limiting bracket; 64. Linear guide; 65. Piston rod connector; 66. Fixed clamping ring; 67. Slider; 7. Hollow special-shaped sleeve; 71. Movable chamber; 72. Second oil inlet; 73. Second oil outlet; 74. Pumping and exhaust port; 8. Rotating rod; 81. Oil filling channel; 9. Second driving unit; 91. Stepping motor; 92. Motor fixing plate; 93. First bevel gear; 94. Second bevel gear. DETAILED DESCRIPTION

[0026] See also Figure 1-4As shown, the utility model relates to a separate oil injection pump, comprising:

[0027] The fixed sleeve 2 has a pumping cavity 21 and a movable cavity 71 disposed therein. The surface of the fixed sleeve 2 is provided with a first oil inlet 23 and a first oil outlet 24 communicating with the movable cavity 71 , and the movable cavity 71 is communicated with the pumping cavity 21 via the pumping cavity 74 .

[0028] The rotating rod 8 is movably mounted in the movable cavity 71 and is provided with an oil injection channel 81 penetrating the rotating rod 8;

[0029] A first pumping device 6, wherein the output end of the first pumping device 6 is connected to the pumping chamber 21;

[0030] a second driving portion 9, wherein the second driving portion 9 drives the rotating rod 8 to rotate;

[0031] The second driving unit 9 drives the rotating rod 8 to rotate so that one end opening of the oil filling channel 81 is connected to the first oil inlet 23, and the other end opening of the oil filling channel 81 is connected to the oil extraction and discharge port 74. At the same time, the first extraction and discharge device 6 is activated and causes the extraction and discharge chamber 21 to generate negative pressure and suck the oil from the first oil inlet 23 into the oil filling channel 81.

[0032] The second driving part 9 drives the ceramic rotating rod 8 to rotate and makes one end opening of the oil injection channel 81 communicate with the first oil outlet 24, and the other end opening of the oil injection channel 81 communicate with the oil extraction and discharge port 74. The first extraction and discharge device 6 is started and causes the extraction and discharge cavity 21 to generate positive pressure and discharge the smoke oil from the oil injection channel 81 to the first oil outlet 24.

[0033] In this embodiment, the beneficial effect is that during the extraction and discharge process, the oil does not directly enter the extraction chamber 21, but is instead transferred through the oil injection channel 81 of the rotating rod 8. This design prevents the oil from flowing directly through the extraction chamber 21, thereby reducing the accumulation of oil contaminants within the extraction chamber 21. When the device needs to be cleaned, since the oil primarily remains in the first oil inlet 23, the first oil outlet 24, and the oil injection channel 81, these areas can be cleaned more easily and thoroughly, preventing odor cross-contamination between different flavors of oil and improving the hygiene of the device. Furthermore, by controlling the movement of the rotating rod 8 and the operating state of the first extraction device 6, the connection between the oil injection channel 81 and the oil inlet, outlet, and extraction and discharge port 74 can be rapidly changed. This dynamic connection mechanism allows bubbles within the chamber to be effectively discharged as the oil flows, thereby preventing bubbles from affecting metered delivery accuracy. This improvement significantly improves injection accuracy, ensuring that each injection meets the preset standards. The entire refueling process is precisely controlled by the second drive unit 9, which rotates the ceramic rotating rod 8 to change the connection state of the refueling channel 81. When the smoke needs to be drawn in, one end of the refueling channel 81 connects to the oil inlet and the other end connects to the oil extraction port 74. The first extraction device 6 generates negative pressure to draw the smoke in. When the smoke needs to be discharged, the two ends of the refueling channel 81 connect to the oil outlet and the oil extraction port 74, respectively. The first extraction device 6 generates positive pressure to push the smoke out. This process design is simple and clear, easy to operate, and efficient.

[0034] Furthermore, the fixed sleeve 2 is also provided with a fixed cavity 22, which is arranged perpendicular to the pumping cavity 21 and is connected to the pumping cavity 21, wherein the fixed cavity 22 is detachably equipped with a hollow special-shaped sleeve 7, and the hollow special-shaped sleeve 7 is provided with a second oil inlet 72 connected to the first oil inlet 23 and a second oil outlet 73 connected to the first oil outlet 24. The interior of the hollow special-shaped sleeve 7 constitutes a movable cavity 71, and the pumping and draining port 74 is provided on the hollow special-shaped sleeve 7.

[0035] Beneficial effects: The fixed cavity 22 is detachably equipped with a hollow shaped sleeve 7. This design makes the replacement and maintenance of the hollow shaped sleeve 7 more convenient. When the hollow shaped sleeve 7 is worn due to long-term use or needs to be cleaned, it can be easily removed from the fixed cavity 22 for necessary repairs or replacements, thereby extending the service life of the oil injection pump. The hollow shaped sleeve 7 is made of ceramic, and this choice has multiple advantages. Ceramic materials have good corrosion resistance and wear resistance, and can resist the chemical components and mechanical wear in the smoke oil, thereby extending the service life of the hollow shaped sleeve 7. Secondly, ceramic materials have good thermal stability and are not easily deformed or cracked due to temperature changes. The high surface smoothness of ceramic materials helps to reduce the resistance of the smoke oil during flow and improve the accuracy of oil injection.

[0036] Furthermore, the second oil inlet 72, second oil outlet 73, and oil extraction and discharge port 74 on the hollow shaped sleeve 7 are evenly distributed at a 120-degree angle along the central axis of the hollow shaped sleeve. Furthermore, the second oil inlet 72, second oil outlet 73, and oil extraction and discharge port 74 on the hollow shaped sleeve 7 are evenly distributed at a 120-degree angle along the central axis of the hollow shaped sleeve. This layout helps optimize the flow path of the e-liquid, reduces fluid resistance, and improves filling efficiency. This design also ensures a more uniform flow of the e-liquid, helping to reduce the generation and accumulation of bubbles. The hollow shaped sleeve 7 is also made of ceramic.

[0037] Furthermore, the openings at both ends of the oil injection channel 81 are distributed at an angle of 120° along the axis of the rotating rod 8 , and one end of the rotating rod 8 extends out of the fixing sleeve 2 and is connected to the second driving part 9 .

[0038] Beneficial effects: The openings at both ends of the oil injection channel 81 on the rotating rod 8 are distributed at an angle of 120° along the axis of the rotating rod 8. This layout design allows the oil injection channel 81 to be flexibly connected or disconnected with the first oil inlet 23, the first oil outlet 24, and the oil extraction and discharge port 74 during the rotation process. By precisely controlling the rotation angle of the rotating rod 8, it can be ensured that the tobacco oil can smoothly enter or leave the oil injection channel 81 when needed, thereby achieving precise oil injection operation. One end of the rotating rod 8 extends out of the fixed sleeve 2 and is connected to the second drive part 9. This design allows the second drive part 9 to directly drive the rotating rod 8 to rotate without going through a complex transmission mechanism. This not only simplifies the structure of the oil injection pump, but also improves the ease and reliability of operation. At the same time, since the connection between the rotating rod 8 and the second drive part 9 is stable, it can be ensured that it will not loosen or fall off during the rotation process. By precisely controlling the rotation speed and rotation angle of the rotating rod 8, precise control of the oil injection process can be achieved. When the smoke needs to be inhaled, the rotating rod 8 rotates to a position where one end of the oil filling channel 81 is connected to the first oil inlet 23 and the other end is connected to the oil extraction and discharge port 74. At this time, the first extraction and discharge device 6 generates negative pressure to draw the smoke into the oil filling channel 81. When the smoke needs to be discharged, the rotating rod 8 rotates again to a position where one end of the oil filling channel 81 is connected to the first oil outlet 24 and the other end is connected to the oil extraction and discharge port 74. At this time, the first extraction and discharge device 6 generates positive pressure to push the smoke from the oil filling channel 81 to the first oil outlet 24. This efficient operation method not only improves the efficiency of oil filling, but also ensures the accuracy and stability of oil filling.

[0039] At the same time, the rotating rod 8 is made of ceramic material, which has the following beneficial effects: ceramic materials have excellent corrosion resistance and can resist erosion by chemical components that may be present in tobacco oil. This means that the ceramic rotating rod 8 is not easily corroded by tobacco oil during long-term use, thereby maintaining the stability of its shape and performance, and extending the service life of the oil injection pump. Ceramic materials have high hardness and good wear resistance, which enables the ceramic rotating rod 8 to resist friction and wear with other components during rotation. Even under high-speed rotation and frequent operation, the ceramic rotating rod 8 can maintain a good surface finish and precision, ensuring smooth oil injection channel 81 and stable oil injection accuracy.

[0040] Furthermore, a ceramic sleeve 4 is installed in the extraction chamber 21, and the first extraction device 6 includes a screw motor 61 that moves in the horizontal direction. A ceramic piston rod 5 is installed at the output end of the screw motor 61, and the screw motor 61 drives the ceramic piston rod 5 to move back and forth in the ceramic sleeve 4.

[0041] Beneficial Effects: Both the ceramic sleeve 4 and the ceramic piston rod 5 are made of ceramic material, which offers excellent corrosion resistance. This effectively resists corrosion when handling chemical liquids like tobacco oil, extending the life of the device. The high hardness and wear resistance of the ceramic material minimize friction and wear between the ceramic sleeve 4 and the ceramic piston rod 5. This means that over long-term use, the gap between them remains minimal, ensuring stable and reliable extraction. The high smoothness of the ceramic material ensures a tighter fit between the ceramic sleeve 4 and the ceramic piston rod 5, improving sealing performance. This helps prevent tobacco oil leakage during extraction, ensuring accurate and clean oil filling. The screw motor 61 drives the ceramic piston rod 5 back and forth within the ceramic sleeve 4, creating a stable and reliable linear motion. Precisely controlling the speed and stroke of the screw motor 61 allows for precise control of the extraction process, improving the accuracy and stability of oil filling. Due to the hardness and smoothness of the ceramic material, the friction noise generated by the ceramic piston rod 5 within the ceramic sleeve 4 is minimal, reducing the operating noise of the oil filling pump and providing a more comfortable user experience.

[0042] Furthermore, it also includes a fixed bracket assembly, which includes a fixed base plate 1 and a fixed plate 3. The fixed plate 3 is installed on the surface of the fixed base plate 1, and a first limiting groove 31 for fitting the fixed sleeve 2 is provided on the surface of the fixed plate 3.

[0043] Beneficial effects: The fixed base plate 1 serves as the foundation of the entire fixed bracket assembly, providing a stable support surface. The fixed plate 3 is mounted on the surface of the fixed base plate 1 and is firmly bonded to the fixed base plate 1 through a specific structural design (such as bolt connection, welding, etc.). This stable base design ensures that the oil injection pump will not be displaced or tilted due to vibration or external force during operation. A first limiting groove 31 is provided on the surface of the fixed plate 3 for fitting the fixed sleeve 2. This design enables the fixed sleeve 2 to be precisely aligned and fixed in the predetermined position during installation, avoiding performance degradation or failure due to installation position deviation. The precise size and shape of the first limiting groove 31 ensure a tight fit between the fixed sleeve 2 and the fixed plate 3, further improving the overall accuracy and stability of the equipment. The design of the fixed bracket assembly takes into account the convenience of installation and maintenance. Through standardized interfaces and connection methods, users can easily complete the installation and removal of the fixed sleeve 2. In addition, the structure of the fixed bracket assembly is relatively simple and clear, which helps users quickly locate problems and take corresponding solutions when performing equipment maintenance.

[0044] Furthermore, the first pumping device 6 also includes a limiting device and a screw motor fixing plate 62. The limiting device includes a U-shaped limiting bracket 63, a piston rod connecting piece 65, and a fixed clamping ring 66. The screw motor 61 is fixed to the surface of the fixed base plate 1 through the screw motor fixing plate 62, and the output end of the screw motor 61 passes through the limiting bracket 63 and is equipped with a piston rod connecting piece 65, and the movable rod connecting piece is connected to the ceramic piston rod 5 through the fixed clamping ring 66, and a second limiting groove 11 is provided on the surface of the fixed base plate 1, and a limiting linear guide rail 64 is installed on the second limiting groove 11, and the limiting bracket 63 is movably equipped on the limiting linear guide rail 64 through a slider 67.

[0045] Beneficial Effect: The U-shaped limit bracket 63 provides a stable support and guide frame for the piston rod and its connecting parts, preventing the ceramic piston rod 5 from deflecting or shaking during linear motion. This enhances the rigidity and stability of the overall structure and ensures the linearity and precision of the ceramic piston rod 5's motion.

[0046] The piston rod connector 65 connects the output of the lead screw motor 61 to the ceramic piston rod 5, ensuring efficient transmission between them. Through precise design and manufacturing, the piston rod connector 65 achieves efficient and reliable transmission, reducing energy loss and mechanical wear. A fixed clamping ring 66 securely connects the piston rod connector 65 to the ceramic piston rod 5, preventing relative movement or loosening between the two.

[0047] Moreover, the second limiting groove 11 provided on the fixed base plate 1 is equipped with a limiting linear guide rail 64, and the limiting bracket 63 is movably mounted on the guide rail through a slider 67. This design limits the movement trajectory of the limiting bracket 63 and ensures its precise movement in a specific direction. It improves the movement accuracy and stability of the limiting bracket 63 and reduces the performance degradation or failure caused by movement deviation. At the same time, it also provides convenience for subsequent maintenance and adjustment. Working process: When the screw motor 61 is working, its output end drives the ceramic piston rod 5 to move back and forth in the ceramic sleeve 4 through the piston rod connector 65. In this process, the U-shaped limiting bracket 63 and the limiting linear guide rail 64 work together to ensure the stability and linearity of the movement of the ceramic piston rod 5. The fixed clamping ring 66 provides a reliable connection and locking force to prevent the connector from loosening or falling off.

[0048] Furthermore, the second driving part 9 includes a stepping motor 91 , the output end of the stepping motor 91 is connected to the first bevel gear 93 , and one end of the rotating rod 8 extending out of the fixing sleeve 2 is equipped with a second bevel gear 94 meshing with the first bevel gear 93 .

[0049] The output end of the stepper motor 91 is connected to the first bevel gear 93, forming the starting point of the transmission system. The first bevel gear 93 is meshed with the second bevel gear 94 to realize the conversion and transmission of power. The characteristics of bevel gear transmission are that it can realize power transmission between different axes and has high transmission efficiency and load-bearing capacity. In the oil injection pump, this transmission method can effectively convert the rotational motion of the motor into the rotational motion of the rotating rod 8. One end of the rotating rod 8 extends out of the fixed sleeve 2 and is connected to the second bevel gear 94. This connection method ensures that the rotating rod 8 can rotate synchronously with the rotation of the second bevel gear 94. By adjusting the module and tooth ratio of the bevel gear, the speed and direction of the rotating rod 8 can be precisely controlled, thereby meeting the requirements of the oil injection pump for oil injection accuracy and efficiency. The design of the second drive unit 9 takes into account the compactness of the structure. By compactly integrating components such as the motor, bevel gear and rotating rod 8, the equipment's footprint and weight are reduced, making the oil injection pump easier to install and transport.

[0050] Furthermore, the second driving unit 9 further includes a motor fixing plate 92 , and the stepping motor 91 is fixed on the fixing plate 3 via the motor fixing plate 92 .

[0051] Beneficial Effects: The primary function of the motor mounting plate 92 is to securely fasten the stepper motor 91 to the mounting plate 3. Through a rational structural design and adequate securing force, the motor mounting plate 92 effectively prevents vibration and loosening of the motor during operation, thereby ensuring stable rotation of the rotating rod 8 and accurate oil injection from the oil injection pump. The design of the motor mounting plate 92 also takes maintenance convenience into consideration. Pre-defined maintenance ports and easily removable connectors allow users to easily inspect or replace the motor. This design reduces the complexity and time cost of maintenance work, thereby improving the overall availability and reliability of the equipment.

[0052] The above embodiments are merely descriptions of preferred embodiments of the present invention and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A separate oil injection pump, characterized in that: include: The fixed sleeve has a pumping cavity and a movable cavity provided therein, and a first oil inlet and a first oil outlet connected to the movable cavity are provided on the surface of the fixed sleeve, and the movable cavity and the pumping cavity are connected through the pumping cavity; A rotating rod, wherein the rotating rod is movably mounted in the movable cavity and is provided with an oil injection channel running through the rotating rod; a first pumping device, wherein an output end of the first pumping device is connected to the pumping cavity; a second driving portion, the second driving portion driving the rotating rod to rotate; The second driving unit drives the rotating rod to rotate so that one end opening of the oil filling channel is connected to the first oil inlet, and the other end opening of the oil filling channel is connected to the oil extraction and discharge port. At the same time, the first extraction and discharge device is started and the extraction and discharge cavity generates a negative pressure and sucks the smoke oil from the first oil inlet into the oil filling channel; the second driving unit drives the ceramic rotating rod to rotate so that one end opening of the oil filling channel is connected to the first oil outlet, and the other end opening of the oil filling channel is connected to the oil extraction and discharge port. The first extraction and discharge device is started and the extraction and discharge cavity generates a positive pressure and discharges the smoke oil from the oil filling channel to the first oil outlet.

2. A separate oil injection pump according to claim 1, characterized in that: The fixed sleeve is also provided with a fixed cavity, which is arranged perpendicular to the pumping cavity and is connected to the pumping cavity, wherein the fixed cavity is detachably equipped with a hollow special-shaped sleeve, and the hollow special-shaped sleeve is provided with a second oil inlet connected to the first oil inlet and a second oil outlet connected to the first oil outlet. The interior of the hollow special-shaped sleeve constitutes a movable cavity, and the oil pumping port is arranged on the hollow special-shaped sleeve.

3. A separate oil injection pump according to claim 2, characterized in that: The second oil inlet, the second oil outlet and the oil pumping and draining ports on the hollow special-shaped sleeve are evenly distributed at 120 degrees along the central axis of the hollow special-shaped sleeve.

4. A separate oil injection pump according to claim 3, characterized in that: The openings at both ends of the oil filling channel are distributed at an angle of 120 degrees along the axis of the rotating rod, and one end of the rotating rod extends out of the fixing sleeve and is connected to the second driving part.

5. A separate oil injection pump according to claim 4, characterized in that: A ceramic sleeve is installed in the pumping chamber. The first pumping device includes a screw motor that moves horizontally. The output end of the screw motor is equipped with a ceramic piston rod, and the screw motor drives the ceramic piston rod to move back and forth in the ceramic sleeve.

6. A separate oil injection pump according to claim 5, characterized in that: It also includes a fixed bracket assembly, which includes a fixed base plate and a fixed plate. The fixed plate is installed on the surface of the fixed base plate, and the surface of the fixed plate is provided with a first limiting groove for fitting a fixed sleeve.

7. The separate oil injection pump according to claim 6, characterized in that: The first pumping device also includes a limit device and a screw motor fixing plate. The limit device includes a U-shaped limit bracket, a piston rod connecting piece, and a fixed clamping ring. The screw motor is fixed to the surface of the fixed base plate through the screw motor fixing plate, and the output end of the screw motor passes through the limit bracket and is equipped with a piston rod connecting piece, and the movable rod connecting piece is connected to the ceramic piston rod through a fixed clamping ring, and a second limit groove is provided on the surface of the fixed base plate, and a limit linear guide rail is installed on the second limit groove, and the limit bracket is movably equipped on the limit linear guide rail through a slider.

8. The separate oil injection pump according to claim 7, characterized in that: The second driving part includes a stepping motor, the output end of the stepping motor is connected to the first bevel gear, and one end of the rotating rod extending out of the fixed sleeve is equipped with a second bevel gear meshing with the first bevel gear.

9. The separate oil injection pump according to claim 8, characterized in that: The second driving unit further includes a motor fixing plate, and the stepping motor is fixed on the fixing plate through the motor fixing plate.

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