Pneumatic negative pressure aspirator

Abstract

The invention belongs to the technical field of aspirators, and particularly discloses a pneumatic negative pressure aspirator which comprises a shell, an upper cover is fixedly mounted at the top end of the shell, a water pumping opening is formed in the top end of the upper cover, spray pipes are fixedly mounted on the two sides of the bottom end of the upper cover, and water storage tanks are arranged at the two ends of the front side of the shell. The top of the water storage tank is connected with the bottom of the upper cover, and the spray pipe is located at the top end of an inner cavity of the water storage tank. By adopting a small and exquisite shell structure and modular design, the equipment can be flexibly moved to various departments for use, fixed installation is not needed, the problem that existing equipment is poor in use flexibility is solved, and the equipment has the effects of being convenient to move and suitable for being used in multiple scenes.

Description

pneumatic negative pressure suction device Technical Field

[0001] This invention relates to the field of suction technology, specifically to a pneumatic negative pressure suction device. Background Technology

[0002] Suction devices are commonly used auxiliary equipment in the medical field, widely applied in surgical treatment, clinical nursing, and other scenarios. Their core function is to remove bleeding, exudate, pus, and contents from organs such as the pleural cavity and oral cavity during surgery, thereby ensuring a clear surgical field, reducing residual contaminants, lowering the risk of infection, and ensuring the smooth conduct of medical procedures. The working principle of a suction device is based on negative pressure generation. A specific structure creates a negative pressure state at the suction head, using atmospheric pressure to force substances outside the suction head towards it, thus completing the "suction" operation.

[0003] However, most of the hospital suction devices or dental suction devices and negative pressure pumps commonly available on the market are large-scale devices with many technical drawbacks: for example, they are bulky and heavy, cannot be moved flexibly, and can only be used in a fixed area, making it difficult to meet the mobile use needs of different departments and different treatment scenarios (such as bedside care and outpatient minor surgery); therefore, the pneumatic negative pressure suction device was invented. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a pneumatic negative pressure suction device, comprising a housing, a top cover fixedly installed at the top of the housing, a water inlet at the top of the top of the top cover, and nozzles fixedly installed on both sides of the bottom end of the top cover; water tanks are provided at both ends of the front side of the housing, the top of the water tanks is connected to the bottom of the top cover, and the nozzles are located at the top of the inner cavity of the water tanks; an air inlet shut-off valve is provided at the rear side of the housing, an air distribution block is fixedly installed at the front side of the housing, and the air distribution block is connected to the air inlet shut-off valve by a pipe thread; air flow pipes are connected to both ends of the air distribution block; a vacuum generator connected to the air flow pipes is fixedly installed at both ends of the front side of the housing; a vent hole is opened on the top side wall of the water tank, and the vacuum end of the vacuum generator is fixed in the vent hole.

[0005] As a preferred embodiment of the pneumatic negative pressure suction device of the present invention, the nozzle has a first one-way valve at the top of its inner cavity, and the airflow pipe has a second solenoid valve, which is fixed to the vacuum generator by a threaded connection.

[0006] As a preferred embodiment of the pneumatic negative pressure suction device of the present invention, the air inlet valve is provided with an air inlet, and one end of the air inlet extends to the outside of the housing.

[0007] In a preferred embodiment of the pneumatic negative pressure suction device of the present invention, a drain outlet is provided on the rear side of the housing, and flow grooves are provided on both sides of the bottom end of the housing, and the drain outlet and the flow grooves are connected.

[0008] As a preferred embodiment of the pneumatic negative pressure suction device of the present invention, a second one-way valve is fixedly installed at the bottom of the water storage tank, and the second one-way valve is located in the flow channel, and a lower cover is provided at the bottom of the inner cavity of the flow channel.

[0009] As a preferred embodiment of the pneumatic negative pressure suction device of the present invention, a set of silencer fixing blocks are fixedly installed at the exhaust ends of the two sets of vacuum generators, and a silencer is fixedly installed on the silencer fixing blocks.

[0010] As a preferred embodiment of the pneumatic negative pressure suction device of the present invention, the side of the housing is provided with a rinsing water inlet, a water flow pipe is fixedly installed in the rinsing water inlet, one end of the water flow pipe is fixedly installed on the upper cover and connected to the water inlet.

[0011] In a preferred embodiment of the pneumatic negative pressure suction device of the present invention, a first solenoid valve is provided on the water pipe, and the first solenoid valve is fixedly installed on the front side of the housing.

[0012] As a preferred embodiment of the pneumatic negative pressure suction device of the present invention, the front two ends of the housing are provided with liquid level sensors, and the ends of the liquid level sensors extend into the water storage tank.

[0013] As a preferred embodiment of the pneumatic negative pressure suction device of the present invention, the side of the housing is provided with a start switch, an indicator light and a power interface in sequence, the housing is provided with a circuit board, and the circuit board is electrically connected to the start switch, the indicator light, the power interface, the first solenoid valve, the liquid level sensor and the second solenoid valve respectively.

[0014] Compared with existing technologies: 1. By adopting a compact shell structure and modular design, the equipment can be flexibly moved to various departments without fixed installation, solving the problem of poor flexibility in the use of existing equipment, and achieving the effect of convenient mobility and adaptability to multiple scenarios; 2. By setting up two sets of water storage tanks and a vacuum generator, combined with the automatic control of liquid level sensors and circuit boards, the water storage tanks can be automatically switched and sewage can be automatically discharged, eliminating the need for frequent manual cleaning, solving the problem of cumbersome operation of existing equipment, and achieving the effect of automated operation and reducing the workload of medical staff; 3. By setting up a silencer, the exhaust noise of the vacuum generator during operation is absorbed, solving the problem of high noise in existing equipment, and achieving the effect of low-noise operation of the equipment and improving the treatment environment. Attached Figure Description

[0015] Figure 1 is a front view of the three-dimensional structure of the present invention; Figure 2 is a rear view of the three-dimensional structure of the present invention; Figure 3 is a front view of the structure of the present invention; Figure 4 is a rear sectional view of the structure of the present invention; Figure 5 is a front sectional view of the structure of the present invention; Figure 6 is a side sectional view of the structure of the present invention; Figure 7 is a three-dimensional schematic diagram of a partial structure of the present invention.

[0016] In the diagram: 1. Top cover, 2. Water inlet, 3. Flushing inlet, 4. Water tank, 5. Air inlet, 6. Air intake valve, 7. Start switch, 8. Indicator light, 9. Power interface, 10. Bottom cover, 11. Drain, 12. Circuit board, 13. Air distribution block, 14. First solenoid valve, 15. Liquid level sensor, 16. Silencer fixing block, 17. Vacuum generator, 18. Second solenoid valve, 19. Silencer, 20. First check valve, 21. Nozzle, 22. Second check valve. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0018] This invention provides a pneumatic negative pressure suction device, as shown in Figures 1-7. It includes a housing, which serves as the mounting carrier for the entire device, used to fix and support various functional components. The housing is made of high-strength, wear-resistant plastic, ensuring structural stability while reducing the overall weight of the device for easy movement. A top cover 1 is fixedly installed at the top of the housing, connected to the housing with sealing bolts to ensure internal sealing and prevent air and water leakage. A water inlet 2 is located at the top of the top cover 1, used to connect to an external suction pipe for suctioning substances (such as blood, sputum, and exudate). Its port has a sealing interface, compatible with suction tubes of different specifications. Nozzles 21 are fixedly installed on both sides of the bottom of the top cover 1. The nozzles 21 and the top cover 1 are integrally molded to ensure a secure connection. The nozzles 21 employ a Laval nozzle structure, utilizing the principle of the Laval nozzle to effectively increase suction force and improve suction efficiency, solving the problem of insufficient suction force in existing devices. Both ends of the front side of the shell are provided with water storage tanks 4. The water storage tanks 4 are used to store the inhaled sewage (mixture of blood, sputum, etc.), and the nozzle 21 is located at the top of the inner cavity of the water storage tank 4 to ensure that the inhaled sewage can smoothly enter the interior of the water storage tank 4 and avoid leakage.

[0019] An air intake shut-off valve 6 is located on the rear side of the housing. This valve is manually adjustable, allowing medical personnel to control the gas flow rate into the gas distributor 13 by rotating its adjustment knob, thereby adjusting the suction force of the device to suit different treatment scenarios. The gas distributor 13 is fixedly installed on the front side of the housing, secured to the housing surface with bolts. The gas distributor 13 is connected to the air intake shut-off valve 6 via pipe threads and is sealed to prevent gas leakage. Both ends of the gas distributor 13 are connected to airflow pipes, which are sealed to the gas distributor 13 to dissipate the gas. Gas is delivered to vacuum generator 17; vacuum generators 17 connected to airflow pipes are fixedly installed at both ends of the front side of the housing. Vacuum generators 17 are fixed to the housing by brackets, and their input ends are sealed to airflow pipes. The vacuum end is fixed in the vent hole and sealed. Vacuum generator 17 has three functions: air intake, vacuum generation, and exhaust. Its core function is to achieve air intake and blowing, providing power for suction and drainage. Vent holes are opened on the top side wall of water storage tank 4 to allow gas flow between water storage tank 4 and vacuum generator 17, providing a channel for negative pressure generation inside water storage tank 4 and sewage discharge.

[0020] The nozzle 21 has a first one-way valve 20 at the top of its inner cavity. This first one-way valve 20 is a waterproof, sealed type, designed to prevent wastewater in the water storage tank 4 from flowing back into the nozzle 21 and the suction port 2, thus avoiding contamination of the suction pipe and internal components. The airflow pipe has a second solenoid valve 18, which is threadedly fixed to the vacuum generator 17. The second solenoid valve 18 controls the opening and closing of the airflow pipe, thereby controlling the operating state of the corresponding vacuum generator 17. The air inlet valve 6 has an air inlet 5, one end of which extends outside the housing. The air inlet 5 is used to connect to external compressed gas, providing a power source for the equipment.

[0021] A drain outlet 11 is provided on the rear side of the shell, which is used to discharge the sewage collected in the water storage tank 4. Its port can be connected to a drainage pipe for centralized sewage treatment. Flow grooves are provided on both sides of the bottom end of the shell. The flow grooves are connected to the bottom end of the water storage tank 4, and the drain outlet 11 is connected to the flow grooves to form a sewage discharge channel. A second one-way valve 22 is fixedly installed at the bottom end of the water storage tank 4 and is located in the flow groove. The function of the second one-way valve 22 is to prevent sewage in the flow groove from flowing back into the water storage tank 4. At the same time, when the water storage tank 4 needs to be drained, it can be opened by gas to allow sewage to be discharged smoothly. A lower cover 10 is provided at the bottom of the inner cavity of the flow groove. The lower cover 10 is threadedly connected to the shell, which is convenient to open and clean the residual sewage and impurities in the flow groove to maintain the cleanliness of the equipment.

[0022] A set of silencer fixing blocks 16 are fixedly installed at the exhaust end of the two sets of vacuum generators 17. The silencer fixing blocks 16 are fixed to the vacuum generators 17 by bolts, and silencers 19 are fixedly installed on the silencer fixing blocks 16. The silencers 19 are sealed to the exhaust end of the vacuum generators 17 to absorb the exhaust noise generated when the vacuum generators 17 are working, reduce the operating noise of the equipment, improve the comfort of the treatment environment, and solve the problem of high noise of existing large equipment.

[0023] The side of the housing is provided with a flushing inlet 3, which is used to connect to an external flushing water source. A water flow pipe is fixedly installed in the flushing inlet 3, and the water flow pipe is sealed to the flushing inlet 3. One end of the water flow pipe is fixedly installed on the upper cover 1 and connected to the suction port 2, which is used to deliver flushing water to the suction port 2 and the spray pipe 21 to achieve flushing of the suction pipe and the spray pipe 21 and prevent residual dirt from clogging the pipe. A first solenoid valve 14 is provided on the water flow pipe and is fixedly installed on the front side of the housing. The first solenoid valve 14 is used to control the opening and closing of the water flow pipe, thereby controlling the delivery of flushing water and realizing the start and stop control of the flushing function.

[0024] Liquid level sensors 15 are provided at both ends of the front side of the housing. The liquid level sensors 15 are fixed to the housing by threaded connection, and the end of the liquid level sensor 15 extends into the water storage tank 4 for real-time detection of the sewage level in the water storage tank 4. When the sewage level reaches a preset threshold, the liquid level sensor 15 sends a signal to the circuit board 12, which controls the second solenoid valve 18 on the corresponding side to close, stopping the operation of the vacuum generator 17 on that side, and starting the vacuum generator 17 on the other side, realizing the automatic switching of the two sets of vacuum generators 17 without manual intervention, reducing the workload of medical staff.

[0025] The side of the housing is sequentially equipped with a start switch 7, an indicator light 8, and a power interface 9. The power interface 9 is used to connect to an external AC power source to provide power to the electrical components of the entire device. A circuit board 12 is located inside the housing. The circuit board 12 is the control core of the device and is fixedly installed in a mounting slot inside the housing. The circuit board 12 is electrically connected to the start switch 7, indicator light 8, power interface 9, first solenoid valve 14, liquid level sensor 15, and second solenoid valve 18 via wires, enabling unified control of each component. The start switch 7 controls the overall start and stop of the device. When the start switch 7 is pressed, the circuit board 12 is powered on, and the device enters the working state. The indicator light 8 displays the working status of the device, including power indication, solenoid valve working indication, and liquid level alarm indication, allowing medical personnel to monitor the device's operation in real time. The circuit board 12 receives signals from the liquid level sensor 15 and controls the start, stop, and switching of the second solenoid valve 18 and the vacuum generator 17, while simultaneously controlling the opening and closing of the first solenoid valve 14 to control the flushing function.

[0026] In practical use, those skilled in the art should operate according to the following steps: 1. Equipment connection: Connect the external compressed gas pipeline to the air inlet 5, the suction pipeline to the water inlet 2, the drain pipeline to the drain outlet 11, and the external flushing water pipeline to the flushing water inlet 3. Connect the external AC power supply through the power interface 9; 2. Equipment start-up: Press the start switch 7, the circuit board 12 is powered on, the indicator light 8 lights up, indicating that the equipment has started successfully. At this time, the circuit board 12 controls one of the second solenoid valves 18 to open, and the vacuum generator 17 on the corresponding side starts to work; 3. Suction adjustment Section: Medical staff adjust the gas flow rate entering the gas distribution block 13 by rotating the air intake shut-off valve 6 on the outside of the housing, thereby adjusting the negative pressure generated by the vacuum generator 17 to ensure that the suction force meets the current diagnostic and treatment needs; 4. Suction operation: The material to be suctioned (such as blood, sputum) enters the water inlet 2 through the suction pipeline, and then enters the corresponding water storage tank 4 through the nozzle 21 (Laval nozzle increases suction force), realizing the suction function; the exhaust noise generated by the vacuum generator 17 during operation is absorbed by the silencer 19 to reduce operating noise; 5. Water storage tank switching: when the sewage in one of the water storage tanks 4 is switched... When the liquid level reaches a preset threshold, the liquid level sensor 15 sends a signal to the circuit board 12. The circuit board 12 controls the second solenoid valve 18 on that side to close, stopping the corresponding vacuum generator 17 from working. At the same time, it controls another set of second solenoid valves 18 to open, starting another set of vacuum generators 17 to work, realizing the alternating use of the two sets of water storage tanks 4 to ensure continuous suction work; 6. Sewage discharge: The gas supplied by the vacuum generator 17 to the stopped water storage tank 4 enters the interior of the water storage tank 4 through the vent at the top of the water storage tank 4. The gas pressure opens the second one-way valve at the bottom of the water storage tank 4. 22. Wastewater in the storage tank 4 flows into the drain outlet 11 through the flow channel and is then discharged through the drain pipe; 7. Pipeline flushing: After the suction work is completed, the first solenoid valve 14 can be opened by the circuit board 12. External flushing water enters the suction outlet 2 and the spray pipe 21 through the flushing inlet 3 and the water flow pipe to flush the suction pipe and the spray pipe 21 to prevent dirt residue from clogging; 8. Equipment shutdown: After the suction work and flushing work are completed, press the start switch 7 to shut down the equipment, disconnect the power supply of the power interface 9, disassemble all connecting pipes, open the lower cover 10 to clean the flow channel, and complete the equipment maintenance.

[0027] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, as long as there is no structural conflict, the features in the disclosed embodiments can be combined with each other in any manner. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A pneumatic negative pressure suction device, comprising a housing, characterized in that, The top of the housing is fixedly installed with a top cover (1), the top of the top cover (1) is provided with a water inlet (2), the bottom of the top cover (1) is fixedly installed with nozzles (21) on both sides, the front of the housing is provided with water tanks (4), the top of the water tank (4) is connected to the bottom of the top cover (1), and the nozzles (21) are located at the top of the inner cavity of the water tank (4); the rear of the housing is provided with an air intake cut-off valve (6), the front of the housing is fixedly installed with a gas distribution block (13), and the gas distribution block (13) is connected to the air intake cut-off valve (6) through a pipe thread, the two ends of the gas distribution block (13) are connected with airflow pipes, the front of the housing is fixedly installed with a vacuum generator (17) connected to the airflow pipes, the top side wall of the water tank (4) is provided with a vent hole, and the vacuum end of the vacuum generator (17) is fixed in the vent hole.

2. The pneumatic negative pressure suction device according to claim 1, characterized in that, The nozzle (21) has a first one-way valve (20) at the top of its inner cavity, and a second solenoid valve (18) is provided on the airflow pipe. The second solenoid valve (18) is fixed to the vacuum generator (17) by a threaded connection.

3. The pneumatic negative pressure suction device according to claim 1, characterized in that, The air intake shut-off valve (6) is provided with an air intake port (5), and one end of the air intake port (5) extends to the outside of the housing.

4. The pneumatic negative pressure suction device according to claim 1, characterized in that, The rear side of the housing is provided with a drain outlet (11), and both sides of the bottom end of the housing are provided with flow grooves, and the drain outlet (11) and the flow grooves are connected.

5. The pneumatic negative pressure suction device according to claim 4, characterized in that, The bottom end of the water storage tank (4) is fixedly installed with a second one-way valve (22), and the second one-way valve (22) is located in the flow channel. The bottom end of the inner cavity of the flow channel is provided with a lower cover (10).

6. The pneumatic negative pressure suction device according to claim 1, characterized in that, A set of muffler fixing blocks (16) are fixedly installed at the exhaust end of the two sets of vacuum generators (17), and a muffler (19) is fixedly installed on the muffler fixing blocks (16).

7. The pneumatic negative pressure suction device according to claim 1, characterized in that, The side of the housing is provided with a flushing inlet (3), and a water pipe is fixedly installed in the flushing inlet (3). One end of the water pipe is fixedly installed on the top cover (1) and connected to the water inlet (2).

8. The pneumatic negative pressure suction device according to claim 7, characterized in that, The water pipe is equipped with a first solenoid valve (14), and the first solenoid valve (14) is fixedly installed on the front side of the housing.

9. The pneumatic negative pressure suction device according to claim 8, characterized in that, Liquid level sensors (15) are provided at both ends of the front side of the housing, and the ends of the liquid level sensors (15) extend into the water storage tank (4).

10. The pneumatic negative pressure suction device according to claim 9, characterized in that, The side of the housing is provided with a start switch (7), an indicator light (8) and a power interface (9) in sequence. The housing is provided with a circuit board (12), and the circuit board (12) is electrically connected to the start switch (7), the indicator light (8), the power interface (9), the first solenoid valve (14), the liquid level sensor (15) and the second solenoid valve (18) respectively.

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