A lubricating oil adder for a food-grade screw air compressor

Abstract

This utility model belongs to the technical field of auxiliary equipment for air compressors, and in particular, it is a lubricating oil dispenser for a food-grade screw air compressor. It includes: a movable support assembly; a storage assembly; a conveying assembly, one end of which is connected to the storage assembly and the other end of which is connected to an oil inlet on the screw air compressor body to deliver lubricating oil; a metering control assembly connected in series in the passage of the conveying assembly; and an anti-contamination assembly covering the oil outlet of the conveying assembly. Through the linkage control of a turbine flow meter and a solenoid valve, the addition error is significantly reduced, avoiding waste and preventing equipment wear caused by insufficient addition. The entire process from storage and conveying to oil dispensing provides protection, ensuring that the lubricating oil meets food-grade hygiene standards and reducing the risk of environmental pollution. The movable support assembly allows for flexible movement and easy use in different scenarios.

Description

Technical Field

[0001] This utility model belongs to the technical field of auxiliary equipment for air compressors, specifically relating to a lubricant adder for a food-grade screw air compressor. Background Technology

[0002] In the food production industry, screw air compressors are widely used in various production processes, such as power supply for pneumatic equipment. To ensure the normal operation and service life of the compressor, it is necessary to add lubricating oil to the compressor regularly.

[0003] However, existing methods of adding lubricating oil have many problems: On the one hand, traditional methods mostly involve manual addition, which makes it difficult to accurately control the amount of lubricating oil added during operation. Adding too much will lead to waste of lubricating oil and may contaminate compressed air, affecting food quality and safety; adding too little will not meet the lubrication needs of the compressor and shorten its service life. On the other hand, under the requirements of a hygienic environment in food production, existing adding devices cannot guarantee that the lubricating oil will not be contaminated by external impurities during the addition process, thus posing a potential threat to the food production environment.

[0004] To address the aforementioned issues, this application proposes a lubricant adder for a food-grade screw air compressor. Utility Model Content

[0005] The purpose of this invention is to provide a lubricating oil adder for a food-grade screw air compressor, in order to solve the problems mentioned in the background art of the difficulty in accurately controlling the amount of lubricating oil added and the susceptibility to contamination by impurities in traditional lubricating oil adding methods.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a lubricating oil adder for a food-grade screw air compressor, comprising:

[0007] A movable support assembly for supporting the equipment and enabling its movement;

[0008] A storage assembly, which is disposed on the movable support assembly, is used to store lubricating oil;

[0009] A conveying assembly, one end of which is connected to the storage assembly and the other end of which is used to connect to the oil inlet provided on the main body of the screw air compressor to convey lubricating oil;

[0010] A metering and control component, connected in series in the passage of the conveying component, is used to meter and control the amount of lubricating oil conveyed; and

[0011] An anti-contamination component covers the oil outlet end of the delivery component to prevent external impurities from entering the lubricating oil passage.

[0012] Preferably, the movable support component includes:

[0013] A base, on which the storage component is disposed;

[0014] Lockable casters, four of which are diagonally fixed to the bottom surface of the base; and

[0015] A push-pull handle is fixed to the top surface of the base.

[0016] Preferably, the storage assembly includes:

[0017] A storage hopper, wherein the storage hopper is mounted on the base, and a material extraction port is provided at the bottom end of the outer side of the storage hopper; and

[0018] The top cover is bolted to the top of the storage tank and has a filling port for adding lubricating oil.

[0019] Preferably, it further includes:

[0020] A dust cover is provided on the top of the filling port by means of threaded engagement, and the dust cover has ventilated micropores for balancing the air pressure inside and outside the storage tank.

[0021] Preferably, the conveying assembly includes:

[0022] A centrifugal pump, which is fixed to the top surface of the base;

[0023] A material extraction pipe, one end of which is connected to the material extraction port and the other end of which is connected to the input end of the centrifugal pump;

[0024] A conveying hose, one end of which is connected to the output end of the centrifugal pump; and

[0025] An oil injection gun is attached to the other end of the conveying hose, and an operating handle is fixed to the outer wall of the oil injection gun.

[0026] Preferably, the metering control component includes:

[0027] A solenoid valve, wherein the solenoid valve is disposed between the extraction pipe and the extraction port, and is used to control the on / off state of the extraction pipe; and

[0028] A turbine flow meter is installed between the delivery hose and the oil injection gun to monitor the flow rate of lubricating oil in the delivery hose in real time.

[0029] Preferably, it further includes:

[0030] A rechargeable battery is disposed on the top surface of the base and is electrically connected to the centrifugal pump and the metering control component to provide working power.

[0031] Preferably, the anti-pollution component includes a dust cover fitted onto the oil filling gun and a protective cap screwed onto the end of the dust cover. The dust cover is connected to the oil filling gun via an elastic reset structure to cover the oil outlet of the oil filling gun when not in use. The elastic reset structure includes:

[0032] A limiting ring, the limiting ring being fixed to the outer wall of the oil injection gun;

[0033] Guide rods, a plurality of guide rods are fixed at equal intervals along the circumferential direction to the end of the dust cover and pass through the limiting ring;

[0034] A return spring, wherein the return spring is sleeved on the guide rod and positioned between the dust cover and the limiting ring; and

[0035] A limiting plate is fixed to the end of the guide rod away from the dust cover.

[0036] Preferably, it further includes:

[0037] A filter box is disposed between the solenoid valve and the extraction port;

[0038] A filter screen, which can be pulled out and installed in the filter box, and the filter box has a disassembly and assembly port for disassembling and assembling the filter screen.

[0039] A locking mechanism is used to lock the filter screen plate after it is pushed into the filter box; and

[0040] The U-shaped insert frame is fixed inside the filter box at the position corresponding to the disassembly port, and a slot adapted to the filter screen is provided inside the U-shaped insert frame.

[0041] Preferably, the locking mechanism includes:

[0042] A limiting plate is fixed to the end of the filter screen plate, and notches are provided at both ends of the limiting plate;

[0043] Two flip screws are symmetrically hinged to both ends of the filter box, and the flip screws can pass through the notch; and

[0044] A wing nut is provided at the extended end of the reversing screw by means of thread engagement.

[0045] Compared with the prior art, the beneficial effects of this utility model are:

[0046] 1. Through the linkage control of the turbine flow meter and the solenoid valve, the error in the amount of liquid added is significantly reduced, which avoids waste and prevents equipment wear caused by insufficient liquid addition;

[0047] 2. Comprehensive protection throughout the entire process from material storage and transportation to oil dispensing, ensuring that the lubricating oil meets food-grade hygiene standards and reducing the risk of pollution to the production environment;

[0048] 3. It adopts movable support components for support and flexible movement, making it easy to use in different scenarios.

[0049] Other additional advantages and benefits of this application 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 this application. Attached Figure Description

[0050] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0051] Figure 1 This is a schematic diagram of the structure of this utility model;

[0052] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the diagram;

[0053] Figure 3 This utility model Figure 1 Enlarged structural diagram at point B in the diagram;

[0054] Figure 4 This is a schematic diagram of the isometric structure of the storage tank in this utility model;

[0055] Figure 5 This utility model Figure 4 A magnified structural diagram at point C in the diagram.

[0056] In the diagram: 1. Main body of screw air compressor; 2. Oil inlet; 3. Base; 4. Lockable casters; 5. Push-pull handle; 6. Storage tank; 61. Extraction port; 7. Centrifugal pump; 8. Rechargeable battery; 9. Extraction pipe; 10. Solenoid valve; 11. Delivery hose; 12. Oil gun; 121. Operating handle; 13. Turbine flow meter; 14. Top cover; 141. Replenishment port; 15. Anti-pollution component; 15 1. Dust cover; 152. Limiting ring; 153. Guide rod; 154. Return spring; 155. Limiting plate; 156. Protective cover; 16. Dust cover; 161. Ventilation micropores; 17. Filter box; 171. Disassembly port; 18. Filter screen; 19. Locking mechanism; 191. Limiting plate; 192. Notch; 193. Flip screw; 194. Wing nut; 20. U-shaped insert frame; 201. Slot. Detailed Implementation

[0057] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0058] Please see Figures 1-5 The present invention provides the following technical solution: a lubricating oil adder for a food-grade screw air compressor, comprising: a movable support assembly, a storage assembly, a conveying assembly, a metering control assembly, and an anti-pollution assembly 15.

[0059] Furthermore, by Figure 1 and Figure 2 As shown in this embodiment, the movable support assembly is used to support the equipment and enable movement. The storage assembly is set on the movable support assembly and is used to store lubricating oil. One end of the conveying assembly is connected to the storage assembly, and the other end is used to connect with the oil inlet 2 on the screw air compressor body 1 to convey lubricating oil. The metering and control assembly is connected in series in the passage of the conveying assembly and is used to meter and control the amount of lubricating oil conveyed. The anti-contamination assembly 15 covers the oil outlet of the conveying assembly to prevent external impurities from entering the lubricating oil passage. With the above scheme, in use, firstly, the entire lubricating oil dispenser is pushed to the vicinity of the screw air compressor body 1 by the movable support assembly, so that the oil outlet of the conveying assembly is aligned with the oil inlet 2. At this time, the anti-contamination assembly 15 is in a closed state to prevent external dust, impurities, etc. from contacting the oil outlet of the conveying assembly before connection.

[0060] Next, check the amount of lubricating oil in the storage assembly to ensure there is enough. Then, turn on the metering control assembly, set the required amount of lubricating oil to be added. After the metering control assembly is started, it will open the passage of the conveying assembly. The lubricating oil in the storage assembly will start to flow along the pipeline of the conveying assembly under the power of the conveying assembly.

[0061] During the delivery process, the metering and control components monitor the amount of lubricating oil flowing through in real time. When the preset value is reached, the flow path of the delivery components will be automatically cut off, the delivery of lubricating oil will be stopped, and the amount of oil added will be precisely controlled.

[0062] After the metering and conveying are completed, connect the oil outlet of the conveying component to the oil inlet 2. At this time, open the anti-contamination component 15 so that it no longer covers the oil outlet, ensuring that the lubricating oil can be smoothly injected into the air compressor. After the injection is completed, remove the oil outlet of the conveying component. The anti-contamination component 15 will automatically reset and cover the oil outlet again to prevent impurities from entering the passage, ready for the next use. Throughout the process, the components work together to ensure the accuracy of lubricating oil addition and effectively avoid external contamination, meeting the strict cleanliness requirements of food-grade equipment.

[0063] Optionally, by Figure 1 As shown in this embodiment, the movable support component includes: a base 3, lockable casters 4, and a push-pull handle 5. The storage component is disposed on the base 3. The four lockable casters 4 are diagonally fixed to the bottom surface of the base 3, and the push-pull handle 5 is fixed to the top surface of the base 3. With the above solution, when it is necessary to move the lubricating oil adder for the food-grade screw air compressor, the operator can hold the push-pull handle 5 fixed to the top surface of the base 3. Since the four lockable casters 4 are diagonally fixed to the bottom surface of the base 3, and the lockable casters 4 are in the unlocked state at this time, the operator can apply a pushing or pulling force through the push-pull handle 5, and the lockable casters 4 will rotate flexibly, driving the entire base 3 and the storage component, conveying component, metering control component, and anti-contamination component 15 installed on it to move together, making it convenient to move the equipment to a suitable position close to the screw air compressor body 1.

[0064] Once the equipment is moved to the target position, to prevent accidental movement during subsequent lubrication oil addition, the operator can move the locking mechanisms of the four locking casters 4 to the locked state. At this time, the locking casters 4 can no longer rotate freely, and the base 3 is stably fixed in the current position, ensuring that the entire lubrication oil adder remains stable during operation, providing a reliable support foundation for the smooth operation of subsequent storage components, conveying components, etc.

[0065] Optionally, by Figure 1 and Figure 3As shown, in this embodiment, the storage assembly includes a storage tank 6, a top cover 14, and a dust cover 16. The storage tank 6 is mounted on the base 3, and a material extraction port 61 is provided at the bottom of the outer side of the storage tank 6. The top cover 14 is fixed to the top of the storage tank 6 with bolts, and a replenishment port 141 for replenishing lubricating oil is provided on the top cover 14. The dust cover 16 is screwed onto the top of the replenishment port 141, and a ventilated micropore 161 for balancing the air pressure inside and outside the storage tank 6 is provided on the dust cover 16. When the lubricating oil in the storage tank 6 is insufficient and needs to be replenished, the operator first unscrews the dust cover 16, which is screwed onto the top of the replenishment port 141. At this time, the replenishment port 141 on the top cover 14 is in an open state, and new lubricating oil can be added to the storage tank 6 through the replenishment port 141. After replenishment is completed, the dust cover 16 is screwed back onto the top of the replenishment port 141 to prevent external dust, impurities, etc. from entering the storage tank 6 through the replenishment port 141 and contaminating the lubricating oil.

[0066] During the process of the conveying component drawing lubricating oil from the extraction port 61 at the bottom of the outer side of the storage tank 6, the air pressure inside the storage tank 6 will gradually decrease. At this time, the ventilation micro-holes 161 on the dust cover 16 play an important role. Outside air can enter the storage tank 6 through the ventilation micro-holes 161, thereby balancing the air pressure inside and outside the storage tank 6 and preventing the lubricating oil from being unable to be drawn out smoothly due to the low internal air pressure. At the same time, the small pore size of the ventilation micro-holes 161 can effectively block the entry of external dust and other impurities, ensuring the cleanliness of the lubricating oil inside the storage tank 6.

[0067] The top cover 14 is fixed to the top of the storage tank 6 with bolts, which not only ensures the sealing of the storage tank 6 and prevents lubricating oil leakage and external pollution, but also makes it easy to remove the top cover 14 by unscrewing the bolts when it is necessary to clean or maintain the inside of the storage tank 6. The operation is convenient and reliable.

[0068] Optionally, by Figure 1 and Figure 2As shown, in this embodiment, the conveying assembly includes a centrifugal pump 7, a suction pipe 9, a conveying hose 11, and an oil injection gun 12. The metering and control assembly includes a solenoid valve 10 and a turbine flow meter 13. The centrifugal pump 7 is fixed to the top surface of the base 3. One end of the suction pipe 9 is connected to the suction port 61, and the other end is connected to the input end of the centrifugal pump 7. One end of the conveying hose 11 is connected to the output end of the centrifugal pump 7, and the other end of the conveying hose 11 is connected to the oil injection gun 12. An operating handle 121 is fixed on the outer wall of the oil injection gun 12. The solenoid valve 10 is located between the suction pipe 9 and the suction port 61 to control the opening and closing of the suction pipe 9. The turbine flow meter 13 is located between the conveying hose 11 and the oil injection gun 12 to monitor the flow rate of lubricating oil in the conveying hose 11 in real time. With the above scheme, when adding lubricating oil, first ensure that the oil outlet of the oil injection gun 12 is aligned with the oil injection port 2 of the screw air compressor body 1, and hold it stably by using the operating handle 121.

[0069] After the equipment is started, the solenoid valve 10 in the metering control component opens first, forming a passage between the extraction pipe 9 and the extraction port 61 of the storage tank 6. Then the centrifugal pump 7 starts to work, extracting lubricating oil from the storage tank 6 through the extraction pipe 9. Under the power of the centrifugal pump 7, the lubricating oil enters the centrifugal pump 7 through the extraction pipe 9 and is then pumped into the conveying hose 11.

[0070] When the lubricating oil flows in the delivery hose 11, the turbine flow meter 13 located between the delivery hose 11 and the oil injection gun 12 starts to monitor the flow rate of the lubricating oil in real time and transmits the flow data to the metering control system. The operator can preset the amount of lubricating oil to be added. When the turbine flow meter 13 detects that the total amount of lubricating oil flowing through it reaches the preset value, the metering control system will issue a command to close the solenoid valve 10, cut off the passage of the extraction pipe 9, and at the same time, the centrifugal pump 7 stops working, terminating the delivery of lubricating oil.

[0071] Throughout the conveying process, the flexible conveying hose 11 allows operators to easily adjust the position and angle of the oil gun 12 to ensure precise alignment with the oil inlet 2. Meanwhile, the operating handle 121 of the oil gun 12 provides operators with a stable grip point, facilitating control of the oil injection action, preventing oil spillage during the addition process, and ensuring the convenience and accuracy of the operation.

[0072] By working in concert with the delivery and metering control components, the entire process of lubricating oil delivery from storage to precise delivery to the air compressor is controlled. This improves the efficiency of adding the oil and ensures the accuracy of the amount added, meeting the stringent requirements of food-grade equipment for lubricating oil addition.

[0073] Optionally, by Figure 1As shown, this embodiment also includes a rechargeable battery 8, which is located on the top surface of the base 3 and is electrically connected to the centrifugal pump 7 and the metering control component to provide working power. With the above solution, the rechargeable battery 8 serves as the power source for the entire lubricating oil adder during use and plays a key role in the equipment's operation. When the equipment needs to be moved and lubricating oil is added, there is no need to rely on an external power source. The rechargeable battery 8 will continuously provide a stable working power to the centrifugal pump 7 and the metering control component (including the solenoid valve 10 and the turbine flow meter 13) that are electrically connected to it.

[0074] After the equipment is started, the electrical energy output by the rechargeable battery 8 drives the centrifugal pump 7 to operate, enabling it to smoothly extract lubricating oil from the storage tank 6. At the same time, the electrical energy also provides power for the opening and closing of the solenoid valve 10, ensuring the timely opening and closing of the material extraction pipe 9. The turbine flow meter 13 also relies on the power provided by the rechargeable battery 8 to realize real-time monitoring and data transmission of the lubricating oil flow in the conveying hose 11, ensuring the accuracy of metering control.

[0075] It should be noted that the present invention may also include a metering control system (not shown in the figure), which is electrically connected to the centrifugal pump 7, the rechargeable battery 8, the solenoid valve 10 and the turbine flow meter 13, for controlling the operation of the centrifugal pump 7, the solenoid valve 10 and the turbine flow meter 13, and the metering control system can preset the amount of lubricating oil injected. When the amount of injection meets the preset value, the centrifugal pump 7 and the solenoid valve 10 are shut off through the metering control system.

[0076] Optionally, by Figure 1 and Figure 2As shown, in this embodiment, the anti-pollution component 15 includes a dust cover 151 fitted onto the oil gun 12 and a protective cap 156 screwed onto the end of the dust cover 151. The dust cover 151 is connected to the oil gun 12 via an elastic reset structure to cover the oil outlet end of the oil gun 12 when not in use. The elastic reset structure includes a limiting ring 152, a guide rod 153, a reset spring 154, and a limiting plate 155. The limiting ring 152 is fixed to the outer wall of the oil gun 12. Multiple guide rods 153 are fixed at equal intervals along the circumferential direction at the end of the dust cover 151 and pass through the limiting ring 152. The reset spring 154 is fitted onto the guide rod 153 and is located between the dust cover 151 and the limiting ring 152. The limiting plate 155 is fixed to the end of the guide rod 153 away from the dust cover 151. After adopting the above scheme, when in use, the anti-pollution component 15 can effectively prevent external impurities from entering the oil outlet of the oil gun 12 in the non-use state. At this time, the protective cover 156 is tightly set at the end of the dust cover 151 by threaded engagement, forming a double protection together with the dust cover 151. In the elastic reset structure, the reset spring 154 is in a naturally extended state, and its elastic force acts between the dust cover 151 and the limiting ring 152, pushing the dust cover 151 to tightly cover the oil outlet of the oil gun 12. The limiting ring 152 is fixed to the outer wall of the oil gun 12, which plays a limiting and guiding role for the guide rod 153. The limiting plate 155 is fixed at the end of the guide rod 153 away from the dust cover 151, which can prevent the guide rod 153 from falling out of the limiting ring 152 and ensure the stability of the entire elastic reset structure.

[0077] When it is necessary to add lubricating oil to the oil inlet 2 of the screw air compressor body 1 using the oil gun 12, the operator first unscrews the protective cover 156, then holds the operating handle 121, aligns the oil outlet of the oil gun 12 with the oil inlet 2 and pushes it forward. During the pushing process, the dust cover 151 is resisted by the edge of the oil inlet 2 and moves backward against the elastic force of the return spring 154. The guide rod 153 slides backward synchronously along the through hole of the limiting ring 152, and the limiting plate 155 moves accordingly. At this time, the return spring 154 is compressed. As the dust cover 151 moves backward, the oil outlet of the oil gun 12 is gradually exposed until it is completely connected to the oil inlet 2 (or inserted into the oil inlet 2), which facilitates the smooth injection of lubricating oil.

[0078] After the oil is added, the operator removes the oil gun 12 from the oil inlet 2. The resistance force on the dust cover 151 disappears, and the return spring 154 returns to its natural extended state under the action of elasticity, pushing the dust cover 151 forward to cover the oil outlet end of the oil gun 12 again. Finally, the operator reinstalls the protective cover 156 at the end of the dust cover 151 by screwing it on, so that the anti-contamination component 15 returns to the protective state in the non-use state, ensuring that the oil outlet end of the oil gun 12 is always in a clean environment and avoiding external impurities from contaminating the lubricating oil passage.

[0079] Preferably, by Figure 1 , Figure 4 and Figure 5 As shown, this embodiment also includes: a filter box 17, a filter screen 18, a locking mechanism 19, and a U-shaped insert frame 20. The locking mechanism 19 includes: a limiting plate 191, a flip screw 193, and a wing nut 194. The filter box 17 is disposed between the solenoid valve 10 and the extraction port 61. The filter screen 18 can be pulled out and disposed in the filter box 17. The filter box 17 has an opening 171 for removing and installing the filter screen 18. After the filter screen 18 is pushed into the filter box 17, it is locked by the locking mechanism 19. The U-shaped insert frame 20 is fixed in the filter box 17 at the position corresponding to the opening 171. The U-shaped insert frame 20 has a slot 201 adapted to the filter screen 18. The limiting plate 191 Fixed to the end of the filter screen plate 18, and with notches 192 at both ends of the limiting plate 191, two rotating screws 193 are symmetrically hinged to both ends of the filter box 17. The rotating screws 193 can pass through the notches 192. The wing nuts 194 are provided at the protruding ends of the rotating screws 193 by thread engagement. With the above scheme, during use, the filter box 17 plays a key filtering role in the process of adding lubricating oil. When the lubricating oil flows out from the extraction port 61 of the storage tank 6, it will first enter the filter box 17. At this time, the filter screen plate 18 in the filter box 17 can filter the lubricating oil and intercept any impurities that may be present, ensuring that the lubricating oil entering the subsequent conveying components is clean and meets food-grade requirements.

[0080] When the filter screen 18 needs to be installed, the operator aligns the filter screen 18 with the disassembly port 171 on the filter box 17 and pushes it in. Since the U-shaped insert 20 is fixed in the filter box 17 at the position corresponding to the disassembly port 171, and the U-shaped insert 20 has a slot 201 that is compatible with the filter screen 18, the filter screen 18 will smoothly enter the filter box 17 along the slot 201.

[0081] When the filter screen 18 is fully pushed in, the limiting plate 191 at its end will fit against the outer wall of the filter box 17. At this time, the operator flips the two symmetrically hinged flip screws 193 at both ends of the filter box 17 so that the flip screws 193 pass through the notches 192 at both ends of the limiting plate 191. Then, the wing nut 194 is screwed onto the protruding end of the flip screw 193 by thread engagement and the wing nut 194 is tightened to firmly lock the limiting plate 191, preventing the filter screen 18 from loosening or falling off during operation and improving the sealing performance.

[0082] When the filter screen 18 needs to be cleaned or replaced after a period of use, the operator only needs to loosen the wing nut 194 and remove it from the flip screw 193. Then, flip the flip screw 193 out of the notch 192 of the limit plate 191, and pull the limit plate 191 to pull the filter screen 18 out of the filter box 17 for subsequent cleaning or replacement. After that, the new or cleaned filter screen 18 can be reinstalled according to the above installation and locking steps.

[0083] Through the coordinated operation of the filter box 17, filter screen 18, locking mechanism 19 and U-shaped insert frame 20, impurities in the lubricating oil can be effectively filtered, and the filter screen 18 can be easily disassembled and maintained, ensuring the continuity and stability of the filtration effect.

[0084] It should be noted that the power devices involved in this utility model are all commercially available conventional equipment with built-in power switches. Those skilled in the art can make conventional selections according to their needs. Their working principles are common knowledge known to those skilled in the art and have been fully disclosed in the prior art, so they will not be elaborated on further in this article.

[0085] The circuit connection involved in this utility model is a common method used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments. It belongs to the widely used prior art.

[0086] Components not described in detail in this article are existing technologies.

[0087] The working principle and usage process of this utility model: When using the additive of this utility model, the operator holds the push-pull handle 5 on the top surface of the base 3. Because the four locking universal wheels 4 are fixed diagonally to the bottom surface of the base 3 and are in the unlocked state, the device can be easily pushed to the vicinity of the screw air compressor body 1. After reaching the target position, the locking mechanism of the locking universal wheels 4 is turned to the locked state to make the device stable and fixed, and to prevent displacement during operation.

[0088] The storage hopper 6 stores an appropriate amount of lubricating oil. If the amount is insufficient, unscrew the dust cover 16 at the top of the replenishment port 141 and add lubricating oil through the replenishment port 141. After that, screw the dust cover 16 back on. The ventilated micropores 161 on the dust cover 16 can balance the air pressure inside and outside the storage hopper 6 and prevent impurities from entering.

[0089] Ensure that the filter screen 18 inside the filter box 17 is installed in place. Push the filter screen 18 into the filter box 17 along the slot 201 of the U-shaped insert frame 20. The limiting plate 191 fits against the outer wall of the filter box 17. The flip screw 193 passes through the notch 192 of the limiting plate 191. Tighten the wing nut 194 to lock it in place, ensuring the filtration effect and sealing performance.

[0090] The rechargeable battery 8 supplies power to the centrifugal pump 7, solenoid valve 10 and turbine flow meter 13, ensuring sufficient power. If the power is insufficient, it needs to be charged in advance.

[0091] Unscrew the protective cap 156 at the end of the dust cover 151 in the anti-pollution assembly 15, hold the operating handle 121 of the oil gun 12, align the oil outlet with the oil inlet 2 of the air compressor, and push the oil gun 12. The dust cover 151 will move backward due to the resistance force overcoming the elastic force of the return spring 154. The guide rod 153 will slide along the limit ring 152, and the limit plate 155 will prevent it from falling off. Finally, the oil outlet will be exposed and connected with the oil inlet 2.

[0092] When the equipment is started, the solenoid valve 10 of the metering control component is opened, and the centrifugal pump 7 operates under the power of the rechargeable battery 8. It draws lubricating oil from the extraction port 61 of the storage tank 6 through the extraction pipe 9. The lubricating oil first passes through the filter box 17, and then enters the subsequent passage after the impurities are filtered by the filter screen plate 18.

[0093] The filtered lubricating oil enters the centrifugal pump 7 through the suction pipe 9, and then is pumped into the conveying hose 11. The turbine flow meter 13 monitors the flow rate in real time and transmits data. When the preset addition amount is reached, the metering control system commands the solenoid valve 10 to close, the centrifugal pump 7 to stop working, and the conveying is terminated.

[0094] Remove the oil gun 12. The dust cover 151 moves forward under the action of the return spring 154 to cover the oil outlet again. Screw back the protective cover 156 to complete the pollution prevention protection.

[0095] If the filter screen 18 needs to be cleaned or replaced, loosen the wing nut 194, flip the screw 193 to disengage from the notch 192, pull the limit plate 191 to remove the filter screen 18, and reinstall and lock it according to the original steps after processing. After the equipment is used, it can be moved to the storage location. When the rechargeable battery 8 is low on power, charge it in time to ensure normal use next time.

[0096] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A lubricating oil additive for a food grade screw air compressor, characterized by, include: A movable support assembly for supporting the equipment and enabling its movement; A storage assembly, which is disposed on the movable support assembly, is used to store lubricating oil; A conveying assembly, one end of which is connected to the storage assembly and the other end of which is used to connect to the oil inlet (2) provided on the main body (1) of the screw air compressor, so as to convey lubricating oil; A metering and control component, connected in series in the passage of the conveying component, is used to meter and control the amount of lubricating oil conveyed. as well as Anti-contamination component (15) covers the oil outlet end of the delivery component to prevent external impurities from entering the lubricating oil passage.

2. A food grade lubricating oil additive for a screw air compressor as claimed in claim 1, wherein: The movable support component includes: The base (3) is on which the storage component is disposed; Lockable casters (4), four of which are diagonally fixed to the bottom surface of the base (3); and Push-pull handle (5), which is fixed to the top surface of the base (3).

3. A food grade lubricating oil additive for a screw air compressor as claimed in claim 2, wherein: The storage assembly includes: A storage bin (6) is mounted on the base (3), and a material extraction port (61) is provided at the bottom of the outer side of the storage bin (6); and The top cover (14) is fixed to the top of the storage tank (6) with bolts, and the top cover (14) is provided with a filling port (141) for replenishing lubricating oil.

4. A food grade lubricating oil additive for a screw air compressor as claimed in claim 3, wherein: Also includes: Dust cover (16) is provided on the top of the filling port (141) by means of threaded engagement, and a breathable micropore (161) is provided on the dust cover (16) for balancing the air pressure inside and outside the storage tank (6).

5. A food grade lubricating oil additive for a screw air compressor as claimed in claim 3, wherein: The conveying assembly includes: Centrifugal pump (7), the centrifugal pump (7) is fixed to the top surface of the base (3); The material extraction pipe (9) has one end connected to the material extraction port (61) and the other end connected to the input end of the centrifugal pump (7). Material conveying hose (11), one end of which is connected to the output end of the centrifugal pump (7); and The other end of the oil injection gun (12) is connected to the oil injection gun (12), and an operating handle (121) is fixed on the outer wall of the oil injection gun (12).

6. A food grade lubricating oil additive for a screw air compressor as claimed in claim 5, wherein: The metering control component includes: A solenoid valve (10) is disposed between the extraction pipe (9) and the extraction port (61) for controlling the opening and closing of the extraction pipe (9); and Turbine flow meter (13) is located between the material delivery hose (11) and the oil injection gun (12) and is used to monitor the flow rate of lubricating oil in the material delivery hose (11) in real time.

7. A food grade lubricating oil additive for a screw air compressor as claimed in claim 5, wherein: Also includes: A rechargeable battery (8) is disposed on the top surface of the base (3) and is electrically connected to the centrifugal pump (7) and the metering control component to provide working power.

8. A food grade lubricating oil additive for a screw air compressor as claimed in claim 5, wherein: The anti-pollution component (15) includes a dust cover (151) fitted onto the oil filling gun (12) and a protective cap (156) screwed onto the end of the dust cover (151). The dust cover (151) is connected to the oil filling gun (12) via an elastic reset structure to cover the oil outlet of the oil filling gun (12) when not in use. The elastic reset structure includes: A limiting ring (152) is fixed to the outer wall of the oil injection gun (12); Guide rods (153), a plurality of the guide rods (153) are fixed at equal intervals along the circumferential direction to the end of the dust cover (151) and pass through the limiting ring (152). A return spring (154) is sleeved on the guide rod (153) and positioned between the dust cover (151) and the limiting ring (152); and A limiting plate (155) is fixed to the end of the guide rod (153) away from the dust cover (151).

9. A food grade lubricating oil additive for a screw air compressor as claimed in claim 6, wherein: Also includes: A filter box (17) is disposed between the solenoid valve (10) and the extraction port (61); The filter screen (18) is removable and can be installed in the filter box (17). The filter box (17) has a disassembly and assembly port (171) for disassembling and assembling the filter screen (18). The locking mechanism (19) locks the filter screen (18) after it is pushed into the filter box (17); and U-shaped insert (20), the U-shaped insert (20) is fixed in the filter box (17) at the position corresponding to the disassembly port (171), and a slot (201) adapted to the filter screen (18) is provided in the U-shaped insert (20).

10. A food grade lubricating oil additive for a screw air compressor as claimed in claim 9, wherein: The locking mechanism (19) includes: A limiting plate (191) is fixed to the end of the filter screen plate (18), and notches (192) are provided at both ends of the limiting plate (191). Two rotating screws (193) are symmetrically hinged at both ends of the filter box (17), and the rotating screws (193) can pass through the notch (192); and A wing nut (194) is provided at the protruding end of the reversing screw (193) by means of thread engagement.

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