Automatic liquid preparation device of non-phosphorus degreasing agent

Abstract

The utility model belongs to phosphorus -free degreasing agent processing equipment technical field especially for a kind of phosphorus -free degreasing agent automatic liquid preparation device, including liquid preparation tank, feeding assembly, stirring assembly, control box and spiral pushing type unloading assembly;Liquid preparation tank is used to accommodate the liquid preparation raw material of phosphorus -free degreasing agent and provides liquid preparation reaction space;Three groups of the feeding assembly are located at the top of first top cap and are communicated with the liquid preparation tank;Stirring assembly is located in the liquid preparation tank;Control box is fixed to the outer wall of the liquid preparation tank, and is electrically connected with the feeding assembly and the stirring assembly;The spiral pushing type unloading assembly includes unloading pipe and spiral pushing assembly;Without manual weighing, feeding, it can be configured in production assembly line continuous operation, and production efficiency is greatly improved;Through density sensor real-time monitoring mixed liquid concentration, through control box combination feeding solenoid valve automatic adjustment corresponding component feeding flow, improve product liquid preparation precision, greatly reduce raw material waste and rework cost.

Description

Technical Field

[0001] This utility model belongs to the technical field of phosphorus-free degreasing agent processing equipment, specifically relating to an automatic liquid preparation device for phosphorus-free degreasing agent. Background Technology

[0002] Phosphorus-free degreasing agents are widely used in metal surface treatment due to their environmental friendliness, but the proportion of "phosphorus-free main agent, corrosion inhibitor, and deionized water" in the solution needs to be precisely controlled (usually the main agent accounts for 10-15%, the inhibitor accounts for 5-8%, and water accounts for 77-85%).

[0003] The current method of preparing solutions mainly involves manual weighing and feeding, which has the following problems: 1. The manual operation is inefficient and difficult to match the continuous needs of the production line; 2. The concentration is not monitored in real time and needs to be adjusted after sampling and testing, which has a strong lag and is prone to producing unqualified products.

[0004] To address the aforementioned problems, this utility model proposes an automatic dispensing device for phosphorus-free degreasing agents. Utility Model Content

[0005] To address the aforementioned problems in the existing technology, this utility model provides an automatic dispensing device for phosphorus-free degreasing agents, which features convenient use, high production efficiency, and high processing precision.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an automatic dispensing device for phosphorus-free degreasing agent, comprising a dispensing tank, a feeding assembly, a stirring assembly, a control box, and a spiral pusher feeding assembly;

[0007] The mixing tank is used to contain the raw materials for mixing the phosphorus-free degreasing agent and to provide a space for mixing and reaction. It has a first top cover fixed at the top and a discharge nozzle at the bottom.

[0008] The three sets of feeding components are located at the top of the first top cover and are connected to the liquid mixing tank, for quantitatively feeding phosphorus-free main agent, corrosion inhibitor and deionized water into the liquid mixing tank;

[0009] The stirring assembly is located inside the liquid mixing tank and is used to stir and mix the raw materials inside the liquid mixing tank;

[0010] The control box is fixed to the outer wall of the liquid preparation tank and is electrically connected to the feeding assembly and the stirring assembly.

[0011] The spiral pusher feeding assembly is distributed below the liquid preparation tank. It includes a feeding pipe and a spiral pusher assembly disposed in the feeding pipe. The top end of the feeding pipe is provided with a feeding nozzle that communicates with the discharge nozzle, and the bottom end is provided with a discharge nozzle. A density sensor and a discharge solenoid valve are provided in the connection passage between the feeding nozzle and the discharge nozzle. The density sensor and the discharge solenoid valve are electrically connected to the control box.

[0012] As a preferred technical solution of this utility model, the feeding assembly includes a storage tank, a second top cover, a discharge pipe, a flow sensor, and a feeding solenoid valve.

[0013] The storage tank is located above the first top cover;

[0014] The second top cover is fixed to the top of the storage tank, and a filling nozzle is provided on the second top cover;

[0015] The discharge pipe is fixed to the bottom of the storage tank, and the flow sensor is installed on the discharge pipe;

[0016] The feeding solenoid valve is fixed to the bottom end of the discharge pipe, and the bottom end of the feeding solenoid valve is fixedly connected to the first top cover and communicates with the liquid preparation tank.

[0017] As a preferred embodiment of this utility model, the feeding assembly further includes a liquid level sensor;

[0018] The liquid level sensor is fixed on the second top cover, and the liquid level sensor is an immersion liquid level transmitter.

[0019] As a preferred technical solution of this utility model, the stirring assembly includes a rotating column, a first servo motor, a fixed rod, a stirring paddle, a scraper, a flexible mounting assembly, and a rubber scraper.

[0020] The rotating column is rotatably mounted on the bottom surface of the first top cover;

[0021] The first servo motor is fixed to the top surface of the first top cover and is used to drive the rotating column to rotate;

[0022] The fixing rod is fixed to the outer wall of the rotating column;

[0023] The stirring paddle is fixed to the end of the fixed rod away from the rotating column;

[0024] The scraper is fixed to the outside of the stirring paddle using a flexible mounting assembly, and the rubber scraper is bonded and fixed to the outer wall of the scraper and adhered to the inner wall of the liquid preparation tank.

[0025] As a preferred embodiment of the present invention, the flexible mounting assembly includes a first threaded rod, a first nut, and a telescopic spring;

[0026] At least two of the first threaded rods are fixed at intervals to the outer wall of the scraper and penetrate the stirring paddle;

[0027] The first nut is provided at the protruding end of the first threaded rod by means of thread engagement;

[0028] The telescopic spring is sleeved on the first threaded rod and is located between the stirring paddle and the scraper.

[0029] As a preferred technical solution of this utility model, the spiral feeding assembly includes a rotating rod, spiral blades, and a second servo motor;

[0030] Both ends of the feeding tube are fixed with end plates, and the rotating rod is rotatably disposed between the two end plates;

[0031] The spiral blade is fixed to the outer wall of the rotating rod;

[0032] The second servo motor is fixed to the outer wall of the end plate and is used to drive the rotating rod to rotate.

[0033] As a preferred embodiment of this utility model, a rubber strip is bonded and fixed at the edge of the spiral blade, and the rubber strip is attached to the inner wall of the feed pipe.

[0034] As a preferred technical solution of this utility model, the spiral pusher feeding assembly further includes an installation mechanism. Four support legs are fixed on the bottom surface of the liquid mixing tank and are evenly distributed along the circumferential direction. The feeding pipe is fixed between two of the support legs by the installation mechanism. The installation mechanism includes a clamp, a second threaded rod and a second nut.

[0035] The two clamps are assembled into a ring structure using bolts and are fitted onto the feed pipe;

[0036] At least two second threaded rods are fixed at intervals to the outer wall of the clamp and pass through the support leg;

[0037] The second nut is provided at the protruding end of the second threaded rod by means of thread engagement.

[0038] Compared with the prior art, the beneficial effects of this utility model are:

[0039] 1. No manual weighing or feeding is required; it can be configured for continuous operation in a production line, significantly improving production efficiency.

[0040] 2. The concentration of the mixed solution is monitored in real time by a density sensor, and the feeding flow rate of the corresponding components is automatically adjusted by the control box in conjunction with the feeding solenoid valve, which improves the accuracy of product dispensing and greatly reduces raw material waste and rework costs.

[0041] Other additional advantages and beneficial effects of this 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 this invention. Attached Figure Description

[0042] 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:

[0043] Figure 1 This is a schematic diagram of the structure of this utility model;

[0044] Figure 2 This is a schematic diagram of the isometric structure of the feeding component in this utility model;

[0045] Figure 3 This is an isometric structural diagram of the stirring assembly in this utility model;

[0046] Figure 4 This is a schematic cross-sectional view of the spiral pusher feeding assembly in this utility model;

[0047] Figure 5 This utility model Figure 1 Enlarged schematic diagram of the installation mechanism in the diagram;

[0048] Figure 6 This utility model Figure 3 A magnified schematic diagram of the flexible mounting components in the diagram;

[0049] Figure 7 This utility model Figure 4 A magnified structural diagram at point A in the diagram.

[0050] In the diagram: 1. Liquid mixing tank; 11. Discharge nozzle; 12. Density sensor; 13. Discharge solenoid valve; 14. Support leg; 2. First top cover; 3. Feeding assembly; 31. Storage tank; 32. Second top cover; 321. Injection nozzle; 33. Liquid level sensor; 34. Discharge pipe; 35. Flow sensor; 36. Feeding solenoid valve; 4. Stirring assembly; 41. Rotating column; 42. First servo motor; 43. Fixing rod; 44. Stirring paddle; 45. Scraper; 46. Flexible mounting assembly Components; 461, First threaded rod; 462, First nut; 463, Telescopic spring; 47, Rubber scraper; 5, Control box; 6, Spiral pusher feeding assembly; 61, Feeding pipe; 611, Feed nozzle; 612, Discharge nozzle; 62, Mounting mechanism; 621, Clamp; 622, Second threaded rod; 623, Second nut; 63, End plate; 64, Spiral pusher assembly; 641, Rotating rod; 642, Spiral blade; 643, Second servo motor; 644, Rubber strip. Detailed Implementation

[0051] 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.

[0052] Please see Figures 1-7 The present invention provides the following technical solution: an automatic liquid preparation device for a phosphorus-free degreasing agent, comprising a liquid preparation tank 1, a feeding assembly 3, a stirring assembly 4, a control box 5 (with built-in PLC controller) and a spiral pusher feeding assembly 6.

[0053] Furthermore, by Figure 1 As shown, in this embodiment, the mixing tank 1 is used to contain the raw materials for the phosphate-free degreasing agent and provide a reaction space for the mixing. A first top cover 2 is fixed to its top, and a discharge nozzle 11 is provided at its bottom. Three sets of feeding components 3 are located at the top of the first top cover 2 and communicate with the mixing tank 1, used to quantitatively deliver the phosphate-free main agent, corrosion inhibitor, and deionized water into the mixing tank 1. A stirring component 4 is located inside the mixing tank 1 and is used to stir and mix the raw materials inside the mixing tank 1. A control box 5 is fixed to the outer wall of the mixing tank 1 and is electrically connected to the feeding components 3 and the stirring components 4. A spiral pusher type feeding component 6 is distributed below the mixing tank 1, including a feeding pipe 61 and a feeding nozzle 62. The spiral feeding assembly 64 inside the pipe 61 has an inlet 611 at the top end of the feeding pipe 61 that is connected to the outlet 11, and a discharge nozzle 612 at the bottom end. A density sensor 12 and a discharge solenoid valve 13 are provided in the connection passage between the inlet 611 and the outlet 11. The density sensor 12 and the discharge solenoid valve 13 are electrically connected to the control box 5. After adopting the above scheme, when in use, the operator inputs the mixing ratio of the phosphorus-free degreasing agent (the quantitative ratio of phosphorus-free main agent, corrosion inhibitor, and deionized water) and the total amount of liquid to be mixed in one batch through the operation interface of the control box 5. After receiving the instruction, the control box 5 automatically stores the parameters and enters the standby state.

[0054] The control box 5 sends a start signal to the three sets of feeding components 3. The three sets of feeding components 3 start the quantitative delivery mechanism according to the preset parameters. The feeding component 3 corresponding to the phosphorus-free main agent injects the set dose of phosphorus-free main agent into the liquid preparation tank 1 through the communication port of the first top cover 2. Similarly, the corrosion inhibitor feeding component 3 and the deionized water feeding component 3 complete the quantitative delivery of the corresponding raw materials in sequence.

[0055] After all raw materials are injected into the mixing tank 1, the control box 5 automatically switches commands and starts the stirring component 4. The stirring component 4 thoroughly stirs and mixes the phosphorus-free main agent, corrosion inhibitor and deionized water in the mixing tank 1. The stirring speed and stirring time are preset by the control box 5 according to the mixing process (usually low speed stirring).

[0056] After the stirring component 4 completes stirring, the control box 5 first instructs the stirring component 4 to stop running, and then delays for a certain period of time (to allow the liquid in the liquid preparation tank 1 to settle, so as to avoid the turbulence generated by stirring from affecting the detection accuracy). Then, it sends a "small opening" signal to the discharge solenoid valve 13. The discharge solenoid valve 13 opens slightly, and the degreasing agent initially prepared in the liquid preparation tank 1 slowly flows into the inlet 611 of the spiral push-type feeding component 6 through the discharge nozzle 11. When it flows through the connection passage between the inlet nozzle 611 and the discharge nozzle 11, the density sensor 12 detects the liquid density in real time and converts the density data into an electrical signal and transmits it to the control box 5.

[0057] If the density value meets the preset standard (i.e., the concentration of the solution meets the standard), the control box 5 records the test result and instructs the discharge solenoid valve 13 to fully open, and proceed to the next feeding process.

[0058] If the density value is lower than the standard (i.e. the liquid is too thin, possibly due to excessive deionized water or insufficient main agent / auxiliary agent), the control box 5 immediately closes the discharge solenoid valve 13 and sends a replenishment signal to the corresponding feeding component 3 to replenish phosphorus-free main agent or corrosion inhibitor according to the difference. After the replenishment is completed, the stirring component 4 is restarted. After the second stirring is completed, the density is detected again.

[0059] If the density value is higher than the standard (i.e. the liquid is too concentrated, possibly due to insufficient deionized water), the control box 5 closes the discharge solenoid valve 13 and instructs the deionized water feeding component 3 to replenish a quantitative amount of deionized water. After replenishment, the mixture is stirred again and tested until the density meets the standard.

[0060] Once the density test meets the standard, the control box 5 sends a start signal to the spiral pusher assembly 64 of the spiral pusher feeding assembly 6. The spiral pusher assembly 64 starts, and at the same time, the discharge solenoid valve 13 remains fully open. The qualified phosphorus-free degreasing agent in the liquid preparation tank 1 continuously enters the discharge pipe 61 through the inlet 611. The spiral pusher assembly 64 steadily pushes the liquid along the inner wall of the discharge pipe 61 to the tail end, and finally discharges it through the discharge nozzle 612 (the discharge nozzle 612 can be connected to the liquid storage tank or the liquid supply pipeline of the production line), realizing the automated output of the liquid preparation.

[0061] During the feeding process, the control box 5 continuously monitors the liquid density through the density sensor 12. If density fluctuation occurs (such as uneven mixing of the remaining liquid in the mixing tank 1), the rotation speed of the spiral pusher assembly 64 is immediately adjusted (the rotation speed is reduced to reduce the instantaneous feeding amount), and at the same time, the stirring assembly 4 is instructed to operate at low speed to ensure that the remaining liquid remains in a uniform state.

[0062] After the liquid in the liquid preparation tank 1 is emptied, the control box 5 first instructs the discharge solenoid valve 13 to close, and then delays for a certain period of time (to ensure that the residual liquid in the discharge pipe 61 is completely discharged) before stopping the operation of the screw pusher assembly 64 to complete a single automatic liquid preparation cycle.

[0063] Optionally, by Figure 1 and Figure 2 As shown, in this embodiment, the feeding assembly 3 includes a storage tank 31, a second top cover 32, a discharge pipe 34, a flow sensor 35, and a feeding solenoid valve 36; the storage tank 31 is located above the first top cover 2; the second top cover 32 is fixed to the top of the storage tank 31, and a filling nozzle 321 is provided on the second top cover 32; the discharge pipe 34 is fixed to the bottom of the storage tank 31, and the flow sensor 35 is installed on the discharge pipe 34; the feeding solenoid valve 36 is fixed to the bottom of the discharge pipe 34, and the feeding solenoid valve 36 is... The bottom end of 6 is fixedly connected to the first top cover 2 and connected to the liquid preparation tank 1. After adopting the above scheme, before use, the staff can add the corresponding raw materials to the storage tanks 31 of the three sets of feeding components 3 through the injection nozzle 321 on the second top cover 32. One set of storage tanks 31 is injected with phosphorus-free main agent, one set is injected with corrosion inhibitor, and the third set is injected with deionized water (the injection nozzle 321 can also be connected to a centrifugal pump to draw the corresponding raw materials from the raw material storage container and transport them to the corresponding storage tanks 31).

[0064] When the control box 5 issues a feeding command, the feeding solenoid valve 36 in the corresponding raw material feeding component 3 opens after receiving an electrical signal. The raw material in the storage tank 31 flows downward along the discharge pipe 34 under the action of gravity. At this time, the flow sensor 35 installed on the discharge pipe 34 is activated synchronously to monitor the flow rate of the raw material flowing through the discharge pipe 34 in real time and continuously feeds back the monitoring data to the control box 5 in the form of an electrical signal.

[0065] The control box 5 compares the real-time flow data with the preset quantitative parameters. When the cumulative flow reaches the set value of the raw material, it immediately sends a closing signal to the corresponding feeding solenoid valve 36. The valve core of the feeding solenoid valve 36 is reset and closed, cutting off the passage of the discharge pipe 34 and stopping the raw material conveying, thereby completing the single quantitative feeding.

[0066] Preferably, by Figure 1 and Figure 2 As shown, in this embodiment, the feeding assembly 3 also includes a liquid level sensor 33; the liquid level sensor 33 is fixed on the second top cover 32. The liquid level sensor 33 is an immersion liquid level transmitter. After adopting the above scheme, when the liquid level sensor 33 (immersion liquid level transmitter) is installed, its detection probe extends vertically into the storage tank 31 through the second top cover 32. The end of the probe is close to the bottom of the storage tank 31, which can monitor the liquid level height of the raw materials in the tank in real time. When working, the liquid level sensor 33 converts the liquid level signal into a standard electrical signal by sensing the static pressure of the liquid on the probe (static pressure is proportional to the liquid level height) and continuously transmits it to the control box 5.

[0067] During the material injection stage, when the staff replenishes the raw materials to the storage tank 31 through the injection nozzle 321, the liquid level sensor 33 provides real-time feedback on the liquid level change.

[0068] During daily standby and feeding processes, the liquid level sensor 33 continuously monitors the remaining amount of raw materials. The control box 5 presets a low liquid level threshold. When the raw materials in the storage tank 31 are consumed to this threshold, the liquid level sensor 33 sends a low liquid level signal to the control box 5 to prompt the staff to replenish the raw materials in time. At the same time, the feeding process is interrupted to avoid the feeding deviation caused by insufficient raw materials and to ensure the accuracy of the liquid ratio.

[0069] Optionally, by Figure 1 and Figure 3 As shown, in this embodiment, the stirring assembly 4 includes a rotating column 41, a first servo motor 42, a fixed rod 43, a stirring paddle 44, a scraper 45, a flexible mounting assembly 46, and a rubber scraper 47. The rotating column 41 is rotatably mounted on the bottom surface of the first top cover 2. The first servo motor 42 is fixed to the top surface of the first top cover 2 and is used to drive the rotating column 41 to rotate. The fixed rod 43 is fixed to the outer wall of the rotating column 41. The stirring paddle 44 is fixed to the end of the fixed rod 43 away from the rotating column 41. The scraper 45 is mounted using the flexible mounting assembly. 46 is fixed to the outside of the stirring paddle 44, and the rubber scraper 47 is bonded and fixed to the outer wall of the scraper 45 and attached to the inner wall of the liquid preparation tank 1. After adopting the above scheme, when the control box 5 issues a stirring command, the first servo motor 42 starts, and its output shaft drives the rotating column 41 to rotate around its own axis through the coupling. When the rotating column 41 rotates, the fixed rod 43 fixed to its outer wall moves synchronously in a circular motion, thereby driving the stirring paddle 44 fixed to the end of the fixed rod 43 to rotate in the liquid preparation tank 1, and stirring and mixing in the liquid preparation tank 1.

[0070] As the agitator 44 rotates, the scraper 45 fixed to its outer side moves synchronously with the agitator 44. The scraper 45 is connected to the agitator 44 through a flexible mounting assembly 46. This flexible structure can provide continuous elastic thrust, so that the rubber scraper 47 on the outer side of the scraper 45 always fits tightly against the inner wall of the liquid preparation tank 1.

[0071] When the scraper 45 rotates with the agitator 44, the rubber scraper 47 will scrape the inner wall of the mixing tank 1 in a circumferential manner, scraping the raw materials (especially viscous phosphorus-free main agents or corrosion inhibitors) adhering to the tank wall into the main solution in the mixing tank 1, avoiding waste caused by raw material residue, and preventing the residual raw materials from drying and affecting the purity of subsequent mixing due to long-term adhesion.

[0072] The control box 5 can adjust the speed of the first servo motor 42 (the servo motor supports stepless speed regulation) to adapt to the stirring needs at different stages: for example, a higher speed is used when the raw material is first injected to quickly break up the material stratification; in the later stage of stirring, the speed is switched to a lower speed to reduce solution splashing and bubble generation, and ensure uniform and stable mixing.

[0073] Optionally, by Figure 1 , Figure 3 and Figure 6As shown, in this embodiment, the flexible mounting component 46 includes a first threaded rod 461, a first nut 462, and a telescopic spring 463; at least two first threaded rods 461 are fixed at intervals to the outer wall of the scraper 45 and pass through the stirring paddle 44; the first nut 462 is provided at the protruding end of the first threaded rod 461 by threaded engagement; the telescopic spring 463 is sleeved on the first threaded rod 461 and is located between the stirring paddle 44 and the scraper 45. With the above scheme, during the device assembly stage, the operator determines the appropriate mounting method based on the smoothness of the inner wall of the liquid preparation tank 1 and the material properties of the rubber scraper 47. The preload of the telescopic spring 463 is adjusted by rotating the first nut 462 and moving it axially along the first threaded rod 461. When the nut is tightened toward the stirring paddle 44, the telescopic spring 463 is further compressed, and its thrust on the scraper 45 increases. Conversely, when the first nut 462 is loosened, the thrust of the telescopic spring 463 decreases. Through this adjustment, the rubber scraper 47 can be made to adhere to the inner wall of the liquid preparation tank 1 with appropriate pressure, which ensures that the rubber scraper 47 is in close contact with the tank wall, while avoiding excessive pressure that could cause excessive wear of the rubber scraper 47 or scratches on the tank wall.

[0074] Optionally, by Figure 1 and Figure 4 As shown, in this embodiment, the spiral feeding assembly 64 includes a rotating rod 641, a spiral blade 642, and a second servo motor 643; both ends of the feeding tube 61 are fixed with end plates 63, and the rotating rod 641 is rotatably disposed between the two end plates 63; the spiral blade 642 is fixed to the outer wall of the rotating rod 641; the second servo motor 643 is fixed to the outer wall of the end plate 63 and is used to drive the rotating rod 641 to rotate. With the above scheme, when the control box 5 commands to start the feeding process, the second servo motor 643 starts after receiving the electrical signal, and its output shaft is rigidly connected to one end of the rotating rod 641 through a coupling, driving the rotating rod 641 to rotate around its own axis.

[0075] The spiral blade 642, fixed to the outer wall of the rotating rod 641, rotates synchronously with the rotating rod 641. The spiral blade 642 has a continuous spiral design, and the edge of the spiral blade 642 maintains a small gap with the inner wall of the discharge pipe 61. When the qualified degreasing agent in the liquid preparation tank 1 enters the discharge pipe 61 through the inlet 611, the rotating spiral blade 642 will generate an axial thrust on the liquid: the spiral surface of the spiral blade 642 pushes the liquid along the inner wall of the discharge pipe 61 towards the tail end. At the same time, the sealing property of the spiral structure is used to reduce the backflow of the liquid during the pushing process, ensuring that the liquid moves towards the discharge nozzle 612 at a stable flow rate.

[0076] The control box 5 can flexibly control the feeding speed by adjusting the speed of the second servo motor 643 (the servo motor supports stepless speed regulation): when rapid conveying is required (such as when the production line urgently needs liquid supply), the control box 5 instructs the second servo motor 643 to increase its speed, the spiral blade 642 to push at a faster frequency, and the conveying amount per unit time to increase; when precise control of the feeding amount is required, the speed is reduced, and quantitative output is achieved by extending the pushing time.

[0077] In addition, the continuous spiral structure of the spiral blade 642 can also play an auxiliary role in stirring: during the pushing process, the shearing force of the spiral blade 642 on the liquid can prevent the degreasing agent from local precipitation due to standing, ensuring the uniformity of the output liquid. At the same time, the rotation action of the spiral blade 642 in conjunction with the tiny gap between it and the inner wall of the feed pipe 61 can scrape off the small amount of residual liquid adhering to the inner wall of the feed pipe 61, reducing raw material waste and preventing the residual liquid from drying and affecting the subsequent pushing accuracy.

[0078] Preferably, by Figure 1 , Figure 4 and Figure 7 As shown in this embodiment, a rubber strip 644 is bonded and fixed to the edge of the spiral blade 642, and the rubber strip 644 fits against the inner wall of the discharge pipe 61. With the above solution, the elastic fit of the rubber strip 644 can greatly reduce the side leakage and backflow of liquid during spiral pushing. When the spiral blade 642 rotates to push the liquid, the rubber strip 644 can tightly fill the space between the spiral blade 642 and the inner wall of the discharge pipe 61, so that the liquid moves more efficiently along the spiral direction to the discharge nozzle 612, reducing the "ineffective pushing" caused by gaps, improving the conveying efficiency per unit time, and making the discharge flow rate more stable.

[0079] Because the rubber strip 644 is soft and fits tightly against the inner wall of the feed tube 61, when the spiral blade 642 rotates, the rubber strip 644 will thoroughly scrape the inner wall of the feed tube 61 to remove residual degreasing agent (including tiny droplets or viscous residue) adhering to the tube wall.

[0080] Optionally, by Figure 1 and Figure 5As shown, in this embodiment, the spiral pusher feeding assembly 6 also includes an installation mechanism 62. Four support legs 14 are fixed on the bottom surface of the liquid preparation tank 1, which are evenly distributed along the circumferential direction. The feeding pipe 61 is fixed between two support legs 14 by the installation mechanism 62. The installation mechanism 62 includes a clamp 621, a second threaded rod 622, and a second nut 623. The two clamps 621 are combined with bolts to form a ring structure and are fitted onto the feeding pipe 61. At least two second threaded rods 622 are fixed at intervals to the outer wall of the clamp 621 and pass through the support legs 14. The second nut 623 is provided at the protruding end of the second threaded rod 622 by thread engagement. With the above scheme, during the device assembly stage, the workers first symmetrically fasten the two clamps 621 to the preset position of the feeding pipe 61, and then fasten the two clamps 621 into a closed ring structure by bolts, so that the inner wall of the clamp 621 is tightly fitted with the outer wall of the feeding pipe 61.

[0081] Subsequently, the feed tube 61 with the clamp 621 is raised to the preset height between the support legs 14, so that the second threaded rod 622 is aligned with the reserved through hole on the support leg 14. After the second threaded rod 622 is passed through the support leg 14, the second nut 623 is screwed into the protruding end. By symmetrically tightening the second nuts 623 on both sides, the clamp 621 drives the feed tube 61 to tighten towards the support leg 14 until the feed tube 61 is firmly fixed between the two support legs 14.

[0082] During maintenance or repair, staff only need to loosen the connecting bolts of clamp 621 and the second nut 623 to remove the feed pipe 61 from between the support legs 14, which facilitates cleaning and replacement of parts such as the spiral pusher assembly 64, rubber strip 644 or the inner wall of the feed pipe 61, greatly reducing the difficulty of maintenance.

[0083] It should be noted that the density sensor 12, discharge solenoid valve 13, liquid level sensor 33, flow sensor 35, feeding solenoid valve 36, first servo motor 42, control box 5 (with built-in PLC controller) and second servo motor 643 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 described in detail here.

[0084] 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.

[0085] Components not described in detail in this article are existing technologies.

[0086] The working principle and usage process of this utility model: When using the liquid preparation device of this utility model, the operator replenishes the corresponding raw materials into the storage tanks 31 of the three sets of feeding components 3 through the injection nozzle 321 on the second top cover 32. One set of storage tanks 31 is injected with phosphorus-free main agent, one set is injected with corrosion inhibitor, and the third set is injected with deionized water (the injection nozzle 321 can also be connected to a centrifugal pump to draw the corresponding raw materials from the raw material storage container and transport them to the corresponding storage tanks 31).

[0087] The staff inputs the mixing ratio of the phosphorus-free degreasing agent (the quantitative ratio of phosphorus-free main agent, corrosion inhibitor, and deionized water) and the total amount of solution to be mixed in one batch through the operation interface of control box 5. After receiving the instruction, control box 5 automatically stores the parameters and enters the standby state.

[0088] During the material injection stage, when the staff replenishes the raw materials to the storage tank 31 through the injection nozzle 321, the liquid level sensor 33 provides real-time feedback on the liquid level change.

[0089] During daily standby and feeding processes, the liquid level sensor 33 continuously monitors the remaining amount of raw materials. The control box 5 presets a low liquid level threshold. When the raw materials in the storage tank 31 are consumed to the threshold, the liquid level sensor 33 sends a low liquid level signal to the control box 5 to prompt the staff to replenish the raw materials in time. At the same time, the feeding process is interrupted to avoid the feeding deviation caused by insufficient raw materials and to ensure the accuracy of the liquid ratio.

[0090] When the control box 5 issues a feeding command, the feeding solenoid valve 36 in the corresponding raw material feeding component 3 opens after receiving an electrical signal. The raw material in the storage tank 31 flows downward along the discharge pipe 34 under the action of gravity. At this time, the flow sensor 35 installed on the discharge pipe 34 starts synchronously, monitors the flow rate of the raw material flowing through the discharge pipe 34 in real time, and continuously feeds back the monitoring data to the control box 5 in the form of an electrical signal.

[0091] The control box 5 compares the real-time flow data with the preset quantitative parameters. When the cumulative flow reaches the set value of the raw material, it immediately sends a closing signal to the corresponding feeding solenoid valve 36. The valve core of the feeding solenoid valve 36 is reset and closed, cutting off the passage of the discharge pipe 34 and stopping the raw material conveying, thereby completing a single quantitative feeding.

[0092] After all raw materials are injected into the mixing tank 1, the control box 5 automatically switches commands and starts the stirring component 4. The stirring component 4 thoroughly mixes the phosphorus-free main agent, corrosion inhibitor and deionized water in the mixing tank 1. The stirring speed and stirring time are preset by the control box 5 according to the mixing process (usually low speed stirring).

[0093] After the stirring component 4 completes stirring, the control box 5 first instructs the stirring component 4 to stop running, and then delays for a certain period of time (to allow the liquid in the liquid preparation tank 1 to settle, so as to avoid the turbulence generated by stirring from affecting the detection accuracy). Then, it sends a "small opening" signal to the discharge solenoid valve 13. The discharge solenoid valve 13 opens slightly, and the degreasing agent initially prepared in the liquid preparation tank 1 slowly flows into the inlet 611 of the spiral push-type feeding component 6 through the discharge nozzle 11. When it flows through the connection passage between the inlet nozzle 611 and the discharge nozzle 11, the density sensor 12 detects the liquid density in real time and converts the density data into an electrical signal and transmits it to the control box 5.

[0094] If the density value meets the preset standard, the control box 5 records the test result and instructs the discharge solenoid valve 13 to fully open, and proceeds to the next material feeding process.

[0095] If the density value is lower than the standard (i.e. the liquid is too thin, which may be due to excessive deionized water or insufficient main agent / auxiliary agent), the control box 5 immediately closes the discharge solenoid valve 13 and sends a replenishment signal to the corresponding feeding component 3 to replenish phosphorus-free main agent or corrosion inhibitor according to the difference. After the replenishment is completed, the stirring component 4 is restarted. After the second stirring is completed, the density is detected again.

[0096] If the density value is higher than the standard (i.e. the liquid is too concentrated, possibly due to insufficient deionized water), the control box 5 closes the discharge solenoid valve 13 and instructs the deionized water feeding component 3 to replenish a quantitative amount of deionized water. After replenishment, the liquid is stirred again and tested until the density meets the standard.

[0097] Once the density test meets the standard, the control box 5 sends a start signal to the spiral pusher assembly 64 of the spiral pusher feeding assembly 6. The spiral pusher assembly 64 starts, and at the same time, the discharge solenoid valve 13 remains fully open. The qualified phosphorus-free degreasing agent in the liquid preparation tank 1 continuously enters the discharge pipe 61 through the inlet 611. The spiral pusher assembly 64 steadily pushes the liquid along the inner wall of the discharge pipe 61 to the tail end, and finally discharges it through the discharge nozzle 612 (the discharge nozzle 612 can be connected to the liquid storage tank or the liquid supply pipeline of the production line), realizing the automated output of the liquid preparation.

[0098] During the feeding process, the control box 5 continuously monitors the liquid density through the density sensor 12. If density fluctuation occurs (such as uneven mixing of the remaining liquid in the mixing tank 1), the rotation speed of the spiral pusher assembly 64 is immediately adjusted (the rotation speed is reduced to reduce the instantaneous feeding amount), and at the same time, the stirring assembly 4 is instructed to operate at low speed to ensure that the remaining liquid remains in a uniform state.

[0099] After the liquid in the liquid preparation tank 1 is emptied, the control box 5 first instructs the discharge solenoid valve 13 to close, and then delays for a certain period of time (to ensure that the residual liquid in the discharge pipe 61 is completely discharged) before stopping the operation of the screw pusher assembly 64 to complete a single automatic liquid preparation cycle.

[0100] 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. An automatic dispensing device for a phosphate-free degreasing agent, characterized in that, It includes a liquid preparation tank (1), a feeding assembly (3), a stirring assembly (4), a control box (5), and a spiral pusher feeding assembly (6); The liquid preparation tank (1) is used to contain the liquid preparation raw materials of the phosphorus-free degreasing agent and provide a liquid preparation reaction space. It has a first top cover (2) fixed at the top and a discharge nozzle (11) at the bottom. The three sets of feeding components (3) are located at the top of the first top cover (2) and are connected to the liquid preparation tank (1) for quantitatively feeding phosphorus-free main agent, corrosion inhibitor and deionized water into the liquid preparation tank (1); The stirring assembly (4) is located inside the liquid preparation tank (1) and is used to stir and mix the raw materials inside the liquid preparation tank (1); The control box (5) is fixed to the outer wall of the liquid preparation tank (1) and is electrically connected to the feeding assembly (3) and the stirring assembly (4); The spiral pusher feeding assembly (6) is located below the liquid preparation tank (1). It includes a feeding pipe (61) and a spiral pusher assembly (64) disposed in the feeding pipe (61). The feeding pipe (61) has an inlet (611) at the top end and is connected to the outlet (11), and a discharge nozzle (612) at the bottom end. A density sensor (12) and a discharge solenoid valve (13) are provided in the connection passage between the inlet (611) and the outlet (11). The density sensor (12) and the discharge solenoid valve (13) are electrically connected to the control box (5).

2. The automatic dispensing device for a phosphorus-free degreasing agent according to claim 1, characterized in that: The feeding assembly (3) includes a storage tank (31), a second top cover (32), a discharge pipe (34), a flow sensor (35), and a feeding solenoid valve (36). The storage tank (31) is located above the first top cover (2); The second top cover (32) is fixed to the top of the storage tank (31), and a filling nozzle (321) is provided on the second top cover (32). The discharge pipe (34) is fixed to the bottom of the storage tank (31), and the flow sensor (35) is installed on the discharge pipe (34); The feeding solenoid valve (36) is fixed to the bottom end of the discharge pipe (34), and the bottom end of the feeding solenoid valve (36) is fixedly connected to the first top cover (2) and communicates with the liquid preparation tank (1).

3. The automatic dispensing device for a phosphorus-free degreasing agent according to claim 2, characterized in that: The feeding assembly (3) also includes a liquid level sensor (33). The liquid level sensor (33) is fixed on the second top cover (32), and the liquid level sensor (33) is an immersion liquid level transmitter.

4. The automatic dispensing device for a phosphorus-free degreasing agent according to claim 1, characterized in that: The stirring assembly (4) includes a rotating column (41), a first servo motor (42), a fixed rod (43), a stirring paddle (44), a scraper (45), a flexible mounting assembly (46), and a rubber scraper (47). The rotating column (41) is rotatably mounted on the bottom surface of the first top cover (2); The first servo motor (42) is fixed to the top surface of the first top cover (2) and is used to drive the rotating column (41) to rotate; The fixing rod (43) is fixed to the outer wall of the rotating column (41); The stirring paddle (44) is fixed to the end of the fixed rod (43) away from the rotating column (41); The scraper (45) is fixed to the outside of the stirring paddle (44) using a flexible mounting component (46), and the rubber scraper (47) is bonded and fixed to the outer wall of the scraper (45) and attached to the inner wall of the liquid preparation tank (1).

5. The automatic dispensing device for a phosphorus-free degreasing agent according to claim 4, characterized in that: The flexible mounting assembly (46) includes a first threaded rod (461), a first nut (462), and a telescopic spring (463). At least two of the first threaded rods (461) are fixed at intervals to the outer wall of the scraper (45) and penetrate the agitator (44); The first nut (462) is provided at the protruding end of the first threaded rod (461) by means of thread engagement; The telescopic spring (463) is sleeved on the first threaded rod (461) and is located between the stirring paddle (44) and the scraper (45).

6. The automatic dispensing device for phosphorus-free degreasing agent according to claim 1, characterized in that: The spiral feeding assembly (64) includes a rotating rod (641), a spiral blade (642), and a second servo motor (643). Both ends of the feeding pipe (61) are fixed with end plates (63), and the rotating rod (641) is rotatably disposed between the two end plates (63). The spiral blade (642) is fixed to the outer wall of the rotating rod (641); The second servo motor (643) is fixed to the outer wall of the end plate (63) and is used to drive the rotating rod (641) to rotate.

7. The automatic dispensing device for a phosphorus-free degreasing agent according to claim 6, characterized in that: A rubber strip (644) is bonded and fixed at the edge of the spiral blade (642), and the rubber strip (644) is attached to the inner wall of the feed pipe (61).

8. The automatic dispensing device for phosphorus-free degreasing agent according to claim 1, characterized in that: The spiral pusher feeding assembly (6) also includes an installation mechanism (62). Four support legs (14) are fixed on the bottom surface of the liquid mixing tank (1) and are evenly distributed along the circumferential direction. The feeding pipe (61) is fixed between two of the support legs (14) by the installation mechanism (62). The installation mechanism (62) includes a clamp (621), a second threaded rod (622), and a second nut (623). The two clamps (621) are assembled into a ring structure by bolts and are fitted onto the feed pipe (61); At least two second threaded rods (622) are fixed at intervals to the outer wall of the clamp (621) and pass through the support leg (14); The second nut (623) is provided at the protruding end of the second threaded rod (622) by means of thread engagement.

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