Spraying device for heparin lithium solution

Abstract

The invention discloses a spraying device for a heparin lithium solution. The spraying device comprises a shell, the air pump body is fixedly connected to the middle of the inner top wall of the shell; the solution box is fixedly connected to two side walls in the shell and is used for storing a heparin lithium solution; one end of the conveying pipe is inserted into the solution box, and a first one-way valve is mounted at the other end; and the conveying cavity is fixedly connected to the inner wall of the circular groove in the middle of the top face of the shell, and a quantitative extraction mechanism is arranged in the conveying cavity. Through cooperation of the quantitative extraction mechanism, the conveying cavity and the solution box, accurate quantitative taking of a solution is achieved. Specifically, a medical worker can clamp a blood collection barrel into a specified clamping groove before blood collection, then the pressure of the conveying cavity is controlled to be relieved through a microcontroller, at the moment, a positioning spring drives a piston block to retract in the conveying cavity, and under the directional conduction effect of a first one-way valve, a conveying pipe accurately sucks a heparin lithium solution in a solution box into the conveying cavity; therefore, quantitative extraction and spraying of the solution are achieved.

Description

Technical Field

[0001] This invention relates to the field of heparin lithium solution spraying technology, and more particularly to a heparin lithium solution spraying apparatus. Background Technology

[0002] Heparin lithium solution spraying is a core process for anticoagulation treatment of medical device surfaces in the medical field, and is widely used in the production and pretreatment processes of blood collection tubes, syringes and other blood collection and testing equipment.

[0003] In practical applications, the quality of heparin lithium solution spraying has a direct impact on subsequent medical test results: on the one hand, the accuracy of the spraying amount must be strictly controlled. Excessive spraying may dilute the blood sample, while insufficient spraying will fail to achieve effective anticoagulation, both of which will interfere with the test data; on the other hand, the uniformity of spraying directly determines the integrity of the anticoagulant membrane. Localized missing or accumulated spraying will cause local blood coagulation, leading to sample failure; at the same time, the spraying process must meet aseptic requirements to avoid equipment contamination leading to cross-contamination of samples and ensure biosafety.

[0004] Currently, the industry commonly uses manual dripping or simple spraying equipment to treat lithium heparin solutions. This method has significant technical drawbacks: First, it lacks a quantitative control mechanism, relying entirely on the operator's experience to judge the dosage, resulting in large fluctuations in the spraying amount and poor consistency in anticoagulation effect; Second, manual operation makes it difficult to ensure uniform diffusion of the solution, easily leading to local accumulation or spraying blind spots, resulting in poor film quality; Third, the operation process is cumbersome and inefficient, and there is a potential risk of equipment contamination during manual contact; Fourth, existing simple spraying devices do not have an automated film-forming structure, making it difficult for the solution to adhere quickly and uniformly after spraying, further affecting the stability of the anticoagulation film.

[0005] Therefore, those skilled in the art provide a mass production, rapid cooling plastic molding apparatus to solve the problems mentioned in the background art. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a heparin lithium solution spraying device.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A spraying device for lithium heparin solution, including a housing; The air pump body is fixedly connected to the middle of the inner top wall of the outer casing; A solution box, fixed to the inner two side walls of the outer shell, is used to store heparin lithium solution; The delivery tube is connected at one end to the solution box and at the other end to a first one-way valve. The conveying cavity is fixed to the inner wall of the circular groove in the middle of the top surface of the outer shell, and a quantitative extraction mechanism is provided in the conveying cavity; A rotary joint is located at the top of the quantitative extraction mechanism; A pneumatic wheel is fixedly connected to the top of the rotary joint, and a snap-fit ​​groove is provided in the middle of its top surface. An abutment component is provided on the inner wall of the snap-fit ​​groove. A spraying tube is inserted into the rotary joint for spraying heparin lithium solution; a delivery tube is inserted at one end into the delivery chamber and at the other end into the rotary joint. An air inflator has one end inserted into the air pump body and the other end inserted into a sealed cavity block. The quantitative extraction mechanism extracts heparin lithium solution from the solution box into the delivery chamber, and then delivers it to the spraying pipe through the delivery pipe and rotary joint. The airflow generated by the air pump body drives the pneumatic wheel to rotate the blood collection tube, thereby achieving uniform film formation of the solution.

[0008] As a further embodiment of the present invention, the quantitative extraction mechanism includes a positioning spring, a piston block, and a sliding rod. The piston block slides against the inner wall of the delivery cavity. The sliding rod is fixed to the middle of the surface of the piston block by embedded injection molding. The positioning spring is sleeved on the outer surface of the sliding rod, with one end fixed to the top wall of the delivery cavity and the other end fixed to the surface of the piston block. The piston block is driven to reciprocate by the extension and retraction of the positioning spring, thereby achieving precise quantitative extraction of heparin lithium solution.

[0009] As a further embodiment of the present invention, the contact component includes a contact block and a contact spring. The contact spring is fixed to the bottom wall of the circular groove inside the snap-fit ​​groove. The contact block is fixed to the end of the contact spring by vulcanization bonding. Under the elastic force of the contact spring, the contact block adheres to the outer wall of the blood collection tube, ensuring that the blood collection tube is fixed and stable.

[0010] As a further embodiment of the present invention, the top of the spray tube is provided with a spreading mechanism, which includes a protective cylinder, a miniature electric push rod, a spreading rod, a contact plate, and an auxiliary rod. The protective cylinder is fixedly connected to the top axis of the spray tube, the miniature electric push rod is fixedly connected inside the protective cylinder, the spreading rod is rotatably connected to the top edge of the miniature electric push rod, the contact plate is rotatably connected to the end of the spreading rod, and the two ends of the auxiliary rod are respectively rotatably connected to the back of the contact plate and the edge of the protective cylinder, thus adapting to the positioning of blood collection tubes of different diameters.

[0011] As a further embodiment of the present invention, a circular ring is fixed to the outer surface of the pneumatic wheel, and a vent plate is fixed to the top of the circular ring. A cover is rotatably connected to the top of the vent plate via a hinge. Anti-slip stripes are equidistantly arranged in a circular array on the outer surface of the cover to protect the spray pipe and the pneumatic wheel from contamination.

[0012] As a further embodiment of the present invention, a cavity ring is rotatably connected to the outer surface of the rotary joint, and air supply pipes are inserted into both sides of the bottom of the cavity ring. A pressure relief valve is screwed onto one side of the surface of the air supply pipe. The pressure relief valve controls the air pressure in the delivery chamber to achieve the reset of the quantitative extraction mechanism.

[0013] As a further embodiment of the present invention, a door is rotatably connected to the front of the outer shell via a hinge, and a micro controller is embedded on one side of the front of the door. The micro controller is electrically connected to the air pump body, the micro electric push rod, and the pressure relief valve to achieve coordinated control of the components.

[0014] As a further embodiment of the present invention, an observation window is integrally formed in the center of the front of the solution box. The observation window is made of transparent PVC material and is used to view the remaining amount of heparin lithium solution in real time.

[0015] As a further embodiment of the present invention, a ventilation groove is provided on one side of the back of the outer shell, and a stainless steel dustproof mesh is embedded in the ventilation groove; connecting blocks are screwed to both sides of the outer surface of the outer shell, and a shoulder strap is fixed to the bottom of the connecting blocks to facilitate carrying the device and heat dissipation.

[0016] As a further embodiment of the present invention, each of the four corners of the bottom surface of the outer shell is fixed with a pad by a threaded fastener. The pad is made of rubber and has anti-slip texture on its surface, which is used for anti-slip and shock absorption of the device.

[0017] The beneficial effects of this invention are as follows: 1. A precise quantitative extraction mechanism, delivery chamber, and solution cartridge work together to achieve precise quantitative dispensing of the solution. Specifically, before blood collection, medical personnel can insert the blood collection tube into the designated slot. Then, a microcontroller controls the depressurization of the delivery chamber. At this time, a positioning spring drives the piston block to retract within the delivery chamber. Under the directional guidance of the first one-way valve, the delivery tube precisely draws the heparin lithium solution from the solution cartridge into the delivery chamber, thus achieving quantitative extraction and spraying of the solution. This device, through its structural design, simplifies the operating procedures for medical personnel, effectively improves the accuracy of heparin lithium solution dispensing, and ensures the precise addition of anticoagulants during blood collection.

[0018] 2. The device achieves rapid and uniform solution spraying through the coordinated operation of the air pump body, inflation tube, air delivery tube, and spraying tube. Specifically, when medical personnel need to spray heparin lithium solution onto the inner wall of the blood collection cylinder, they can connect the power supply to the air pump body via the microcontroller. The gas generated by the air pump is then sequentially delivered to the delivery chamber through the inflation tube and air delivery tube. This airflow presses down on the piston block in the delivery chamber, causing the heparin lithium solution in the delivery chamber to enter the spraying tube through the delivery tube, and then be evenly sprayed onto the inner wall of the blood collection cylinder, thus quickly completing the solution spraying operation. This device controls the solution release through the air pressure driven by the air pump, simplifying the traditional manual spraying process and effectively improving the spraying efficiency and uniformity of heparin lithium solution on the inner wall of the blood collection cylinder.

[0019] 3. With the pneumatic wheel, rotary joint, and air pump body, when medical staff spray heparin lithium solution onto the blood collection tube, they can invert the blood collection tube inside the retaining groove. Then, the air pump body delivers gas to the inside of the circular ring, causing the pneumatic wheel to be blown by the gas. The pneumatic wheel can drive the blood collection tube to rotate rapidly along the rotary joint, so that the heparin lithium solution adsorbed on the inner wall of the blood collection tube can form a uniform film, thereby achieving the effect of rapid film formation of heparin lithium solution.

[0020] 4. A uniform film formation of the solution is achieved through the coordinated operation of the pneumatic wheel, rotary joint, and air pump body. Specifically, after medical personnel spray the heparin lithium solution onto the blood collection tube, the tube can be inverted and placed in the retaining groove. The air pump body then delivers gas into the circular ring, driving the pneumatic wheel to rotate under the airflow. This, in turn, causes the rotary joint to rapidly centrifuge the blood collection tube, allowing the heparin lithium solution adsorbed on the inner wall of the tube to diffuse evenly under centrifugal force and form a stable film. This device, through a pneumatically driven centrifugal rotation mechanism, effectively solves the problem of localized solution accumulation and significantly improves the uniformity and efficiency of the heparin lithium solution film formation on the inner wall of the blood collection tube.

[0021] 5. Through the coordinated use of the spreading mechanism and the spraying rod, when this device is used to spray and position large-sized blood collection tubes, the operator can place the blood collection tube on the top of the spraying tube and connect the power supply of the micro electric push rod. The micro electric push rod will drive the auxiliary rod to lift upward. Since the auxiliary rod and the top of the electric push rod are rotatably connected, the auxiliary rod will drive the spreading rod to open outward, which will then drive the contact plate to contact the inner wall of the blood collection tube. This facilitates the spraying tube to adapt to blood collection tubes of different diameters for spraying heparin lithium solution. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the main structure of a heparin lithium solution spraying device proposed in this invention; Figure 2This is a second-view structural schematic diagram of a heparin lithium solution spraying device proposed in this invention. Figure 3 This is a side cross-sectional view of a heparin lithium solution spraying device proposed in this invention. Figure 4 This invention provides a spraying device for lithium heparin solution. Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a schematic diagram of the disassembled structure of the spray pipe of a heparin lithium solution spraying device proposed in this invention; Figure 6 This is a schematic diagram of the top cross-sectional structure of the pneumatic wheel of the heparin lithium solution spraying device proposed in this invention; Figure 7 This is a side cross-sectional view of the pneumatic wheel structure of the heparin lithium solution spraying device proposed in this invention.

[0023] In the diagram: 1. Outer shell; 2. Air pump body; 3. Cover; 4. Solution box; 5. Delivery pipe; 6. First one-way valve; 7. Delivery chamber; 8. Positioning spring; 9. Inflation pipe; 10. Slide rod; 11. Circular ring; 12. Rotary joint; 13. Liquid delivery pipe; 14. Cavity ring; 15. Air delivery pipe; 16. Pressure relief valve; 17. Pneumatic wheel; 18. Snap-fit ​​groove; 19. Spraying pipe; 20. Ventilation plate; 21. Abutment assembly; 211. Abutment block; 212. Abutment spring; 22. Connecting block; 23. Shoulder strap; 24. Pad block; 25. Stop door; 26. Microcontroller; 27. Sealed cavity block; 28. Piston block; 29. ​​Protective cylinder; 30. Abutment plate; 31. Spreading rod; 32. Auxiliary rod; 33. Miniature electric push rod. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. It should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection", and "setting" should be interpreted broadly. For those skilled in the art, the specific meaning of the above terms in this patent can be understood according to the specific circumstances.

[0025] Reference Figures 1-7A heparin lithium solution spraying device is disclosed. The outer shell 1 is integrally injection molded from medical-grade ABS plastic, with a regular overall structure. The material is odorless, disinfection-resistant, and not prone to aging, making it suitable for frequent use and disinfection requirements in medical environments. At the four corners of the bottom surface of the outer shell 1, pads 24 are fixedly connected by hot melt adhesive. The pads 24 are made of highly elastic rubber with fine anti-slip textures on the surface, effectively preventing slippage during device placement and providing cushioning and shock absorption during operation, reducing the impact of component vibration. Connecting blocks 22 are symmetrically arranged on both sides of the outer surface of the outer shell 1. The connecting blocks 22 are rectangular stainless steel components, detachably fixed to the outer shell 1 using a threaded connection. The threads are tightly engaged, ensuring no loosening after installation. Disassembly is achieved by simply rotating clockwise, facilitating future maintenance or replacement of internal components. The bottom of the connecting block 22 is firmly connected to the shoulder strap 23 by rivets. The shoulder strap 23 is made of high-strength nylon material, which is soft and has strong tensile strength. It can be buckled and its length can be flexibly adjusted to suit the height and carrying habits of different operators. The shoulder strap conforms to the shoulder curve, which can reduce the pressure on the shoulder when carrying it for a long time, making it easy for operators to move the device to various work scenarios.

[0026] Specifically, the air pump body 2 is securely mounted on the inner top wall of the outer casing 1 with four bolts. The bolts are firmly installed to prevent loosening during operation. The air pump body 2 is a miniature, quiet model, operating with low noise to avoid interfering with the medical environment. It also boasts strong operational stability, continuously providing a stable airflow. Solution containers 4 are bolted to the inner side walls of the outer casing 1. These containers are made of transparent medical-grade PVC, offering excellent sealing performance and effectively preventing leakage or external contamination of the heparin lithium solution. An observation window, integrally formed with the casing body, is located in the center of the front of the solution container 4. The high transparency of the window allows operators to clearly observe the remaining solution level even in low-light conditions, enabling timely replenishment. A venting groove is located on one side of the back of the outer casing 1, with a stainless steel dustproof mesh embedded inside. The fine mesh pores ensure efficient heat dissipation during operation of the air pump body 2, maintaining the normal operating temperature of the components, while also preventing external dust from entering the device and affecting its operation.

[0027] In particular, one side of the solution container 4 has an integrally formed interface with a sealing groove. A sealing ring is embedded in the groove, and the delivery tube 5 is sealed to the interface through the sealing ring, ensuring a tight and leak-free connection. The delivery tube 5 is made of medical-grade silicone tubing, which is flexible and can be arranged flexibly according to the internal structure of the device. It also has good corrosion resistance and will not react with the heparin lithium solution. The end of the delivery tube 5 away from the solution container 4 is fixedly installed with a first one-way valve 6 by a clamp. The first one-way valve 6 is made of medical-grade stainless steel, and its valve core is highly responsive. It can quickly open when the solution is flowing and immediately close when the flow stops, allowing the solution to flow only from the solution container 4 to the delivery chamber 7, effectively avoiding the problem of solution backflow causing contamination or inaccurate dosage.

[0028] In particular, a circular groove is formed in the center of the top surface of the outer casing 1, and the inner wall of the circular groove is machined with internal threads. The conveying cavity 7 is fixedly installed to the circular groove through the threads, resulting in a stable connection and good sealing performance after installation. The conveying cavity 7 is a cylindrical stainless steel component with a finely polished inner wall, resulting in a smooth and burr-free surface, which reduces the friction when the piston block 28 slides, ensuring smooth sliding. The conveying cavity 7 is equipped with a quantitative extraction mechanism, which includes a positioning spring 8, a piston block 28, and a slide rod 10. The piston block 28 is made of rubber, and its diameter is precisely matched with the inner diameter of the conveying cavity 7. An annular sealing ring is provided on the outer surface, which fits tightly against the inner wall of the conveying cavity 7, effectively preventing gas and liquid leakage. The slide rod 10 is fixedly connected to the center of the piston block 28 by welding, and the weld is firm and reliable, with no risk of detachment. The slide rod 10 is made of stainless steel and has high straightness. One end is fixed vertically to the piston block 28, and the other end passes through a through hole in the top wall of the delivery chamber 7 and extends to the outside. A sealing ring is provided at the through hole to further enhance the sealing effect and prevent gas leakage. The positioning spring 8 is sleeved on the outer surface of the slide rod 10. The spring has stable elasticity and good extension and contraction performance. One end is welded and fixed to the top wall of the delivery chamber 7, and the other end is welded and fixed to the surface of the piston block 28. Through the natural extension and contraction of the spring, the piston block 28 can be driven to reciprocate within the delivery chamber 7 to realize the extraction and pushing of the solution.

[0029] In particular, the output end of the air pump body 2 is connected to an inflation tube 9 via a clamp. The clamp has a moderate tightening force, ensuring a tight connection without damaging the inflation tube 9. The inflation tube 9 is a medical-grade silicone tube with a diameter adapted to the air pump output end, allowing for smooth airflow delivery. A sealing cavity block 27 is inserted into the end of the inflation tube 9 via a sealing ring. The sealing cavity block 27 is made of rubber and has an internal diversion channel with a smooth inner wall, allowing for even distribution of the gas generated by the air pump to different pipelines, ensuring stable airflow in each pipeline. A rotary joint 12 is fixedly installed on the top of the quantitative extraction mechanism via welding. The weld is well-sealed, preventing gas or liquid leakage. The rotary joint 12 is made of stainless steel and has an internal through-flow liquid delivery channel. It is equipped with a high-precision rotary bearing on the outside. The bearing rotates flexibly with low friction, ensuring stable delivery of solution and gas during rotation without interruption or leakage. A pneumatic wheel 17 is fixedly installed on the top of the rotary joint 12 by welding. The pneumatic wheel 17 is an aluminum alloy disc structure, which is lightweight and high-strength, and can start quickly and maintain stable rotation under the action of airflow.

[0030] In particular, a locking groove 18 is provided in the center of the top surface of the pneumatic wheel 17. The inner wall of the locking groove 18 is smooth, facilitating the insertion and removal of the blood collection tube. Four circular grooves are equidistantly arranged on the inner wall of the locking groove 18, and each circular groove contains an abutment component 21. The abutment component 21 includes an abutment block 211 and an abutment spring 212. The abutment spring 212 is a stainless steel compression spring with good elastic recovery performance. One end is welded and fixed to the bottom wall of the circular groove, ensuring a firm weld. The other end is bonded to the abutment block 211, preventing it from easily detaching. The abutment block 211 is an arc-shaped rubber block with a curvature precisely matched to the inner wall of the locking groove 18. Its surface has fine anti-slip textures, allowing it to tightly adhere to the outer wall of the blood collection tube under the elastic force of the abutment spring 212. Even with slight differences in the specifications of the blood collection tubes, it can achieve quick and stable fixation, preventing the blood collection tubes from shaking during the spraying process.

[0031] In particular, a spray tube 19 is inserted inside the rotary joint 12, and a sealing structure is provided at the insertion point to ensure no leakage during solution delivery. The spray tube 19 is a medical-grade stainless steel tube with a smooth wall and strong corrosion resistance. Multiple spray holes are evenly distributed at the top to ensure comprehensive and uniform coverage of the solution during spraying. A hollow ring 14 is rotatably connected to the outer surface of the rotary joint 12 via a bearing. The fit between the bearing, the rotary joint 12, and the hollow ring 14 is extremely small, ensuring smooth rotation while maintaining good sealing. The hollow ring 14 is a stainless steel annular component with a hollow interior, maintaining a seal with the rotary joint 12 to prevent gas or liquid leakage. Air delivery tubes 15, made of medical-grade silicone tubing, are inserted into both sides of the bottom of the hollow ring 14 via clamps, ensuring reliable connection and stable airflow delivery. A pressure relief valve 16 is fixedly installed on one side of the air supply pipe 15 by threads. The threaded connection is tight. The pressure relief valve 16 is a miniature electromagnetic type, which is sensitive and can quickly respond to control signals to realize automatic adjustment of air pressure.

[0032] In particular, a circular ring 11 is welded and fixed to the outer surface of the pneumatic wheel 17, with a firm and secure weld. The circular ring 11 is an aluminum alloy ring component with a hollow interior, communicating with the diversion channel of the sealed cavity block 27, and can evenly deliver airflow to the vent plate 20. The vent plate 20 is bolted to the top of the circular ring 11, with evenly distributed bolts, resulting in a flat and stable vent plate 20 after installation. The vent plate 20 is a stainless steel perforated plate with high strength and is not easily deformed. The surface has dense and evenly distributed vent holes, which form a stable airflow when gas is discharged through the vent holes, generating a uniform circumferential thrust on the pneumatic wheel 17 and driving it to rotate smoothly. A cover 3 is rotatably connected to the top of the vent plate 20 via a hinge, which allows for flexible rotation and convenient opening and closing. The cover 3 is made of medical-grade ABS plastic. The outer surface has anti-slip stripes arranged in a ring array at equal intervals. The stripes have a clear tactile feel and are easy for operators to open and close. When closed, it can completely cover the internal spray tube 19 and pneumatic wheel 17, effectively preventing dust or foreign objects from contaminating the parts.

[0033] In particular, the top of the spray tube 19 is equipped with a support mechanism, which includes a protective cylinder 29, a miniature electric push rod 33, support rods 31, a contact plate 30, and an auxiliary rod 32. The protective cylinder 29 is a stainless steel cylindrical component, which is welded to the top axis of the spray tube 19. The weld is firm and provides stable support and protection for the internal components. The miniature electric push rod 33 is bolted to the inside of the protective cylinder 29. The installation position is precise and ensures that the extension and retraction direction of the push rod is vertically upward. The miniature electric push rod 33 operates smoothly, and the extension and retraction process is smooth. It can accurately control the extension and retraction amount to meet the fixing requirements of blood collection tubes of different sizes. Three support rods 31 are equidistantly connected to the top edge of the miniature electric push rod 33 through hinges. The hinge connection is flexible, and the support rods 31 can be smoothly extended and retracted. The support rods 31 are stainless steel rods with high strength and are not easy to bend or deform. The end is hinged and fitted with a contact plate 30. The contact plate 30 is an arc-shaped rubber plate that is soft and elastic, preventing damage to the inner wall of the blood collection tube. Its curvature can accommodate various sizes of blood collection tubes. The surface has anti-slip protrusions to enhance friction with the inner wall of the blood collection tube, improving its fixation. An auxiliary rod 32, made of stainless steel and with a length matching the expansion rod 31, is hinged to one side of the back of the contact plate 30. The other end of the auxiliary rod is hinged to the edge of the protective cylinder 29, forming a stable triangular support structure. This ensures that the expansion mechanism can continuously and stably support the blood collection tube after deployment, preventing deformation due to the weight or rotational force of the blood collection tube.

[0034] In particular, a retaining door 25 is mounted on the front of the outer casing 1 via a hinge. The hinge is made of reliable stainless steel, ensuring smooth rotation and a long service life. The retaining door 25 is made of the same material as the outer casing 1 and is secured by a latch when closed. After the latch is locked, the retaining door 25 fits tightly against the outer casing 1, effectively preventing dust from entering. After opening the retaining door 25, the operator can easily replenish the solution in the internal solution box 4 or inspect and maintain the internal components. A microcontroller 26 is embedded on one side of the front of the retaining door 25, with a sealing gasket at the mounting point to prevent liquid leakage. The microcontroller is an easy-to-use model with operation buttons and an LCD display screen. The operation buttons have clear tactile feedback, facilitating quick operation by the operator; the LCD display screen has clear fonts and adjustable brightness, allowing the operator to easily read information such as solution volume and equipment operating status, and quickly complete the setting of the spraying amount. The microcontroller 26 is electrically connected to the air pump body 2, the micro electric push rod 33, and the pressure relief valve 16 via wires. The wires are arranged through the wiring channels inside the outer casing 1, and the wiring is neat and orderly to avoid mess and tangling. The wires are covered with protective tubes to prevent wear and leakage. The coordinated and orderly operation of each component can be achieved through preset programs.

[0035] In particular, a liquid delivery tube 13 is inserted into one side of the surface of the delivery chamber 7 via a clamp. After the clamp is tightened, the connection is tight. The liquid delivery tube 13 is a medical-grade silicone tube with good flexibility, which can adapt to the installation path inside the device. The end is inserted into the liquid inlet of the rotary joint 12 via a sealing ring. The sealing ring ensures that the connection is well sealed and there is no solution leakage, ensuring that the solution can be stably delivered from the delivery chamber 7 to the spraying tube 19.

[0036] The operating procedure of the device is as follows: The operator carries the device to the work site using the shoulder strap 23 and places it on a stable table or workbench. The pad 24 fits tightly against the contact surface to prevent slipping and secure the device. The operator opens the door 25 and checks the remaining heparin lithium solution level through the observation window on the front of the solution container 4. If the solution is insufficient, the operator opens the sealing cap of the filling port of the solution container 4 and slowly pours the heparin lithium solution into the container through the funnel, avoiding spillage. After pouring, the sealing cap is tightened to ensure the airtightness of the solution container 4. When the stop door 25 is closed, the latch on the stop door 25 automatically locks. The operator sets the required spray volume through the operation button of the microcontroller 26. After the setting is completed, the microcontroller 26 sends a control signal to activate the pressure relief valve 16, and the gas in the air supply pipe 15 is quickly discharged. The air pressure in the delivery chamber 7 gradually drops to atmospheric pressure. At this time, the positioning spring 8 slowly pushes the piston block 28 to slide upward along the inner wall of the delivery chamber 7 under its own elastic force. The piston block 28 slides smoothly without jamming. At this time, a negative pressure is generated in the delivery pipe 5. Under the directional conduction of the first one-way valve 6, the heparin lithium solution in the solution box 4 is accurately drawn into the delivery chamber 7 through the delivery pipe 5. The quantitative extraction is achieved according to the sliding stroke of the piston block 28 to meet the anticoagulation requirements of different specifications of medical devices.

[0037] After extraction, the pressure relief valve 16 automatically closes. The operator holds the anti-slip stripes on the outer surface of the cover 3 and lifts the cover 3 upwards. The cover 3 rotates smoothly around the hinge. The blood collection tube is inserted upside down into the locking groove 18 on the top surface of the pneumatic wheel 17. During the insertion of the blood collection tube, the contact block 211 is slowly squeezed. The contact block 211 moves into the circular groove and compresses the contact spring 212. The reaction force of the contact spring 212 pushes the contact block 211 to fit tightly against the outer wall of the blood collection tube, achieving rapid fixation of the blood collection tube. If the diameter of the blood collection tube is large, the operator starts the micro electric push rod 33 through the micro controller 26. The telescopic rod of the micro electric push rod 33 extends smoothly, pushing the opening rod 31 to slowly unfold outwards. The auxiliary rod 32 moves in sync, forming a stable support structure. The contact plate 30 gradually contacts the inner wall of the blood collection tube under the action of the opening rod 31. The contact force is moderate, which will not damage the blood collection tube and can provide sufficient fixing force to ensure that the blood collection tube will not shake or fall off during the spraying process.

[0038] After fixing, the operator starts the air pump body 2 through the microcontroller 26. The air pump body 2 starts quickly and runs stably. The generated gas is divided into two paths through the inflation pipe 9: one path of gas enters the circular ring 11 through the sealed cavity block 27, and then is discharged at high speed through the vent holes of the vent plate 20. The discharged airflow generates a uniform circumferential thrust on the pneumatic wheel 17, driving the pneumatic wheel 17 to rotate stably. The pneumatic wheel 17 drives the blood collection tube to rotate synchronously through the rotary joint 12. The other path of gas enters the air delivery pipe 15 through the cavity ring 14, and is then delivered to the top of the delivery chamber 7. The pressure generated by the gas acts evenly on the piston block 28, pushing the piston block 28 to slide down along the inner wall of the delivery chamber 7. A certain amount of heparin lithium solution in the delivery chamber is smoothly pressed into the rotary joint 12 through the liquid delivery pipe 13. It is then delivered to the spray pipe 19 through the liquid delivery channel inside the rotary joint 12, and evenly sprayed onto the inner wall of the rotating blood collection tube through the spray hole at the top of the spray pipe 19.

[0039] During the rotation of the blood collection tube, the heparin lithium solution adsorbed on the inner wall diffuses evenly under centrifugal force, forming a uniformly thick and strongly adhered anticoagulant film that meets medical anticoagulant standards. After the spraying process is completed, the microcontroller 26 automatically shuts off the air pump body 2 and simultaneously activates the pressure relief valve 16. The air pressure in the delivery chamber 7 gradually decreases, and the positioning spring 8 pushes the piston block 28 to slowly reset, preparing for the next extraction. The operator closes the micro electric push rod 33 via the microcontroller 26, and the expansion rod 31 and auxiliary rod 32 reset simultaneously. The operator then gently pulls the blood collection tube upwards and closes the cover 3, completing one full spraying operation.

[0040] In this application, the structures and connections not described in detail are all prior art, and their structures and principles are well known, so they will not be described in detail here.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A spraying apparatus for heparin lithium solution, characterized in that, include: Outer shell (1); The air pump body (2) is fixed to the middle of the inner top wall of the outer shell (1); Solution box (4) is fixed to the inner two side walls of the outer shell (1) for storing heparin lithium solution; The delivery pipe (5) is connected at one end to the solution box (4) and at the other end is a first one-way valve (6). The conveying cavity (7) is fixed to the inner wall of the circular groove in the middle of the top surface of the outer shell (1), and the conveying cavity (7) is provided with a quantitative extraction mechanism; A rotary joint (12) is located on the top of the quantitative extraction mechanism; A pneumatic wheel (17) is fixed to the top of the rotary joint (12), and a snap-fit ​​groove (18) is provided in the middle of its top surface. The inner wall of the snap-fit ​​groove (18) is provided with an abutment component (21). The spray tube (19) is inserted into the rotary joint (12) for spraying heparin lithium solution; the liquid delivery tube (13) is inserted into the delivery chamber (7) at one end and into the rotary joint (12) at the other end. An air inflator (9) is inserted into the air pump body (2) at one end and a sealing cavity block (27) is inserted into the other end. The quantitative extraction mechanism extracts the heparin lithium solution from the solution box (4) to the delivery chamber (7), and then delivers it to the spraying pipe (19) via the delivery pipe (13) and the rotary joint (12). The airflow generated by the air pump body (2) drives the pneumatic wheel (17) to rotate the blood collection tube, thereby achieving uniform film formation of the solution.

2. The heparin lithium solution spraying apparatus according to claim 1, characterized in that, The quantitative extraction mechanism includes a positioning spring (8), a piston block (28), and a slide rod (10). The piston block (28) slides against the inner wall of the delivery cavity (7). The slide rod (10) is fixed to the middle of the surface of the piston block (28) by embedded injection molding. The positioning spring (8) is sleeved on the outer surface of the slide rod (10), with one end fixed to the top wall of the delivery cavity (7) and the other end fixed to the surface of the piston block (28). The piston block (28) is driven to reciprocate by the extension and retraction of the positioning spring (8) to achieve precise quantitative extraction of heparin lithium solution.

3. The heparin lithium solution spraying apparatus according to claim 1, characterized in that, The contact component (21) includes a contact block (211) and a contact spring (212). The contact spring (212) is fixed to the bottom wall of the circular groove inside the inner wall of the snap-fit ​​groove (18). The contact block (211) is fixed to the end of the contact spring (212) by vulcanization. Under the elastic force of the contact spring (212), the contact block (211) adheres to the outer wall of the blood collection tube to ensure that the blood collection tube is fixed and stable.

4. The heparin lithium solution spraying apparatus according to claim 1, characterized in that, The top of the spray tube (19) is provided with a support mechanism, which includes a protective cylinder (29), a miniature electric push rod (33), a support rod (31), a contact plate (30), and an auxiliary rod (32). The protective cylinder (29) is fixed to the top axis of the spray tube (19), the miniature electric push rod (33) is fixed to the inside of the protective cylinder (29), the support rod (31) is rotatably connected to the top edge of the miniature electric push rod (33), the contact plate (30) is rotatably connected to the end of the support rod (31), and the two ends of the auxiliary rod (32) are rotatably connected to the back of the contact plate (30) and the edge of the protective cylinder (29), respectively, to adapt to the positioning of blood collection tubes of different diameters.

5. The heparin lithium solution spraying apparatus according to claim 4, characterized in that, A circular ring (11) is fixed to the outer surface of the pneumatic wheel (17), and a breathable plate (20) is fixed to the top of the circular ring (11). A cover (3) is rotatably connected to the top of the breathable plate (20) via a hinge. Anti-slip stripes are equidistantly arranged in a circular array on the outer surface of the cover (3) to protect the spray pipe (19) and the pneumatic wheel (17) from contamination.

6. The heparin lithium solution spraying apparatus according to claim 5, characterized in that, The outer surface of the rotary joint (12) is rotatably connected to a cavity ring (14). Both sides of the bottom of the cavity ring (14) are connected to air supply pipes (15). A pressure relief valve (16) is screwed onto one side of the surface of the air supply pipe (15). The pressure relief valve (16) controls the air pressure in the delivery chamber (7) to achieve the reset of the quantitative extraction mechanism.

7. The apparatus for spraying heparin lithium solution according to any one of claims 1 to 6, characterized in that, The front of the outer shell (1) is connected to a door (25) by a hinge. A micro controller (26) is embedded on one side of the front of the door (25). The micro controller (26) is electrically connected to the air pump body (2), the micro electric push rod (33), and the pressure relief valve (16) to realize the coordinated control of each component.

8. The heparin lithium solution spraying apparatus according to claim 7, characterized in that, The solution box (4) has an observation window integrally formed in the center of the front. The observation window is made of transparent PVC material and is used to view the remaining amount of heparin lithium solution in real time.

9. The heparin lithium solution spraying apparatus according to claim 1, characterized in that, A ventilation groove is provided on one side of the back of the outer shell (1), and a stainless steel dustproof mesh is embedded in the ventilation groove; Both sides of the outer surface of the outer shell (1) are screwed with connecting blocks (22), and the bottom of the connecting blocks (22) is fixed with a shoulder strap (23) to facilitate carrying the device and heat dissipation.

10. The heparin lithium solution spraying apparatus according to claim 1, characterized in that, The bottom of the outer shell (1) is fixed with pads (24) at the four corners by threaded fasteners. The pads (24) are made of rubber and have anti-slip textures on the surface, which are used for anti-slip and shock absorption of the device.

Images