Multistage flow negative pressure suction device with sterilization function

Abstract

The invention belongs to the technical field of medical instruments, and relates to a multistage flow negative pressure suction device with a sterilization function, the multistage flow negative pressure suction device comprises a machine shell and a negative pressure unit, the negative pressure unit comprises a multistage vacuum pump set, a buffer bottle, a flowmeter, an electric field sterilizer, a multi-way pipeline, a pressure regulating valve and a liquid storage bottle, the multistage vacuum pump set is installed in the machine shell, and the buffer bottle is installed in the machine shell. A negative pressure connector of the multistage vacuum pump set is connected with a negative pressure outlet of a buffer bottle through a pipeline, a negative pressure inlet of the buffer bottle is connected with a gas outlet of an electric field sterilizer through a pipeline provided with a flow meter, a gas inlet of the electric field sterilizer is connected with a multi-way pipeline, and one branch of the multi-way pipeline is connected to a liquid storage bottle through an electromagnetic valve. And one branch of the multi-way pipeline is connected to the pressure regulating valve. The invention has the advantages of scientific and reasonable design, adjustable flow and pressure, safety, reliability, reduction of pathogen transmission, and easy realization.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices and relates to an aspirator, in particular to a multi-stage flow rate negative pressure aspiration device with a sterilization function. Background Art

[0002] Medical negative pressure aspirator is an instrument used in various medical institutions to remove bleeding, exudate, pus, and contents of chest organs during surgery to make the operation clear and reduce the chance of contamination.

[0003] The existing aspirator is usually provided with a vacuum pump therein. When the aspirator is used in puncture biopsy and rotary excision, the pressure value provided by the existing vacuum pump is insufficient due to the small diameter of the rotary excision needle used for puncture biopsy, which affects the effect of the rotary excision surgery.

[0004] In addition, if the suction device is used on patients with infectious diseases, while sucking out residual liquid through negative pressure, it will also suck out gases containing viruses and bacteria. After the attracted gases are directly discharged into the atmosphere without being treated, the air will be filled with viruses and bacteria, posing a threat to the health of people around them. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a multi-stage flow rate negative pressure suction device with adjustable flow rate and pressure, which is safe and reliable, reduces the spread of pathogens, and is easy to implement and has a sterilization function.

[0006] The present invention solves the technical problem by adopting the following technical solutions:

[0007] A multi-stage flow negative pressure suction device with a sterilization function, characterized in that it comprises a casing and a negative pressure unit, the negative pressure unit comprising a multi-stage vacuum pump group, a buffer bottle, a flow meter, an electric field sterilizer, a multi-way pipeline, a pressure regulating valve and a liquid storage bottle, the multi-stage vacuum pump group is installed on the inner bottom plate of the casing, the negative pressure interface of the multi-stage vacuum pump group is connected to the negative pressure outlet of the buffer bottle through a pipeline, the negative pressure inlet of the buffer bottle is connected to the gas outlet of the electric field sterilizer through a pipeline installed with the flow meter, a multi-way pipeline is connected to the gas inlet of the electric field sterilizer, a branch of the multi-way pipeline is connected to the liquid storage bottle through an electromagnetic valve, and a branch of the multi-way pipeline is connected to the pressure regulating valve installed on the casing.

[0008] Moreover, it also includes an anti-overflow bottle, which is connected between the solenoid valve and the liquid storage bottle on the branch of the multi-way pipeline.

[0009] Moreover, there are two liquid storage bottles and two anti-overflow bottles, and the multi-way pipe is a four-way pipe. The first branch of the four-way pipe is connected to the electric field sterilizer, the second branch of the four-way pipe is connected to the pressure regulating valve, the third branch of the four-way pipe is connected to the first anti-overflow bottle through the pipe installed with the first solenoid valve, and the fourth branch of the four-way pipe is connected to the second anti-overflow bottle through the pipe installed with the second solenoid valve.

[0010] Moreover, the multi-stage vacuum pump group includes four vacuum pumps, solenoid valves, manifolds and silencers. A negative pressure interface is provided on the upper end surface of the manifold, and four interfaces are provided at intervals on the lower end surface of the manifold. A vacuum pump connected to a solenoid valve is installed on each interface, and silencers are installed on the four vacuum pumps.

[0011] Moreover, it also includes a peristaltic pump and a liquid bag. The peristaltic pump is installed on the front end surface of the housing, one end of the peristaltic pump is connected to the liquid bag through a pipeline, and the other end of the peristaltic pump is connected to the operating device through a pipeline.

[0012] Moreover, the electric field sterilizer includes a geodetic body shell, an insulating support frame, an insulating medium tube, a high-voltage pole tube, a high-voltage pole rod and a high-voltage connecting spring sheet. A gas inlet and a gas outlet are respectively arranged at the two ends of the geodetic body shell. An insulating medium tube is installed inside the geodetic body shell through the insulating support frame. The gap between the insulating medium tube and the geodetic body shell forms a disinfection air gap. The high-voltage pole tube is coaxially sleeved in the insulating medium tube. The high-voltage pole rod is inserted in the high-voltage pole tube. A high-voltage connecting spring sheet with an edge abutting against the high-voltage pole tube is installed on the high-voltage pole rod. One end of the high-voltage pole rod extends from one end of the geodetic body shell, and a wire connected to a power board is connected to the extended high-voltage pole rod.

[0013] Moreover, the insulating support frame is composed of a disc support part and a cylindrical insertion part. The cylindrical insertion part is coaxially arranged at the inner center position of the disc support part. The cylindrical insertion part is inserted into the end of the high-voltage pole tube. Air-passing notches are arranged at intervals on the outer edge of the disc support part, and a through hole for inserting the high-voltage pole is provided in the middle of the cylindrical insertion part.

[0014] Moreover, the high-voltage connecting spring sheet is formed by bending a spring sheet, including a vertical penetration portion and upwardly inclined connecting portions at the upper and lower ends of the vertical penetration portion. The vertical penetration portion is penetrated on the high-voltage pole through a through-hole arranged in the middle thereof, and high-voltage connecting spring sheet fastening nuts threadedly connected to the high-voltage pole are arranged at both ends of the vertical penetration portion, and the two connecting portions are crimped on the inner wall of the high-voltage pole tube.

[0015] The advantages and positive effects of the present invention are:

[0016] 1. This multi-stage flow rate negative pressure suction device with sterilization function realizes the purpose of adjustable flow rate through the setting of multi-stage vacuum pump group. According to the use needs, the opening number of vacuum pumps is controlled by the solenoid valves connected to each vacuum pump to realize the adjustment of negative pressure flow rate; the purpose of adjustable negative pressure is achieved through the setting of pressure regulating valve; through the setting of electric field sterilizer on the negative pressure pipeline, the gas attracted by negative pressure can be disinfected and filtered, and the bacteria in the gas can be killed before being discharged into the atmosphere to avoid the spread of bacteria.

[0017] 2. This multi-stage flow negative pressure suction device with sterilization function avoids the problem of the liquid in the storage bottle overflowing into the vacuum pump through the setting of the anti-overflow bottle, thereby extending the service life of the equipment and reducing the failure rate.

[0018] 3. This multi-stage flow rate negative pressure suction device with sterilization function increases the liquid storage capacity by designing two liquid storage bottles, avoiding the need to stop the machine to replace the liquid storage bottle due to full liquid.

[0019] 4. The present invention is scientifically and reasonably designed, has the advantages of adjustable flow and pressure, safety and reliability, reduction of the spread of germs, and easy implementation. It is a highly innovative multi-stage flow negative pressure suction device with sterilization function. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A perspective view of the present invention;

[0021] Figure 2 A schematic diagram showing the internal structure of the casing of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the negative pressure unit of the present invention;

[0023] Figure 4 It is a structural schematic diagram of an electric field sterilizer;

[0024] Figure 5 is a cross-sectional view of the electric field sterilizer of the present invention;

[0025] Figure 6 It is a structural schematic diagram of the insulating support frame of the electric field sterilizer of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the high voltage connection spring sheet of the electric field sterilizer of the present invention;

[0027] Figure 8 It is a working principle diagram of the present invention.

[0028] Description of Reference Numerals

[0029] 1-peristaltic pump, 2-second liquid storage bottle, 3-foot switch, 4-peeling needle, 5-first liquid storage bottle, 6-casing, 7-pressure regulating valve, 8-buffer bottle, 9-first anti-overflow bottle, 10-multi-stage vacuum pump group, 11-flow meter, 12-power board, 13-electric field disinfector, 14-muffler, 15-vacuum pump, 16-manifold, 17-first solenoid valve, 18-four-way pipeline, 19-negative pressure interface, 20-second anti-overflow bottle, 21-second solenoid valve, 22-gas inlet, 23-ground electrode shell, 24-gas outlet, 25-flange, 26-flange fastening nut, 27-spacer sleeve fastening nut, 28 -The second high-voltage pole sealing and fastening nut, 29-high-voltage pole, 30-connecting boss, 31-connecting spring, 32-high-voltage pole sealing and fastening insulating nut, 33-insulating support frame, 34-high-voltage pole body, 35-ground pole tube body, 36-high-voltage connecting spring sheet, 37-insulating medium tube, 38-high-voltage pole tube, 39-flange fastening screw, 40-sealing gasket, 41-insulating spacer sleeve, 42-high-voltage pole top connecting rod body, 43-first high-voltage pole sealing and fastening nut, 44-disinfection air gap, 45-high-voltage connecting spring sheet fastening nut, 46-disc support part, 47-cylindrical insertion part, 48-connecting part, 49-vertical penetration part. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings:

[0031] A multi-stage flow negative pressure suction device with sterilization function, the innovation of which is: comprising a housing 6 and a negative pressure unit, the negative pressure unit comprising a multi-stage vacuum pump group 10, a buffer bottle 8 for stabilizing pressure, a flow meter 11, an electric field sterilizer 13, a multi-way pipeline, a pressure regulating valve 7 and a liquid storage bottle, a multi-stage vacuum pump group is installed on the inner bottom plate of the housing, the negative pressure interface 19 of the multi-stage vacuum pump group is connected to the negative pressure outlet of the buffer bottle through a pipeline, the negative pressure inlet of the buffer bottle is connected to the gas outlet 24 of the electric field sterilizer through a pipeline installed with a flow meter, a multi-way pipeline is connected to the gas inlet 22 of the electric field sterilizer, a branch of the multi-way pipeline is connected to the liquid storage bottle through a solenoid valve, a branch of the multi-way pipeline is connected to the pressure regulating valve installed on the housing, and the electric field sterilizer is installed on a power board 12. It also comprises an anti-overflow bottle, and an anti-overflow bottle is connected between the solenoid valve and the liquid storage bottle on the branch of the multi-way pipeline.

[0032] There are two liquid storage bottles and two anti-overflow bottles, and the multi-way pipeline is a four-way pipeline 18. The first branch of the four-way pipeline is connected to the electric field sterilizer, the second branch of the four-way pipeline is connected to the pressure regulating valve, the third branch of the four-way pipeline is connected to the first anti-overflow bottle 9 through the pipeline installed with the first solenoid valve 17, the first anti-overflow bottle is connected to the first liquid storage bottle 5, the fourth branch of the four-way pipeline is connected to the second anti-overflow bottle 20 through the pipeline installed with the second solenoid valve 21, and the second anti-overflow bottle is connected to the second liquid storage bottle 2.

[0033] The multi-stage vacuum pump group includes four vacuum pumps 15, a solenoid valve, a manifold 16 and a muffler 14. A negative pressure interface is provided on the upper end surface of the manifold, and four interfaces are provided at intervals on the lower end surface of the manifold. A vacuum pump connected to a solenoid valve is installed on each interface, and a muffler is installed on each of the four vacuum pumps. A foot switch 3 for controlling the switch is connected to the multi-stage vacuum pump group. The multi-stage vacuum pump group can achieve negative pressure flow regulation of 0-90kpa to meet the use requirements of different operating equipment.

[0034] During the endoscopic surgery, negative pressure adsorption will adsorb the lesion tissue into the endoscopic hole of the endoscopic needle. In order to facilitate the observation of the endoscopic situation, it is sometimes necessary to repeatedly open and close the negative pressure to suck in more tissue for observation. However, closing the negative pressure cannot release the sucked tissue from the endoscopic hole, which affects the observation effect. Therefore, the present invention designs a peristaltic pump 1 and a liquid bag (not shown in the figure). A peristaltic pump is installed on the front end surface of the housing, and a liquid bag is connected to one end of the peristaltic pump through a pipeline, and the other end of the peristaltic pump is connected to an operating device through a pipeline. In this embodiment, the operating device is a endoscopic needle 4.

[0035] During operation, the peristaltic pump can be used to flush liquid into the rotary cutting needle, and the sucked tissue can be released through the liquid, making it easier for the doctor to observe and operate during the operation.

[0036] The electric field sterilizer comprises a ground electrode housing 23, an insulating support frame 33, an insulating medium tube 37, a high-voltage electrode tube 38, a high-voltage electrode rod 29, a high-voltage connecting spring sheet 36, a high-voltage electrode sealing and fastening insulating nut 32, a connecting spring 31, a first high-voltage electrode sealing and fastening nut 43, an insulating spacer sleeve 41, a flange 25, a flange fastening screw 39, a spacer sleeve fastening nut 27 and a second high-voltage electrode sealing and fastening nut 28. A gas inlet and a gas outlet are respectively arranged at both ends of the ground electrode housing for air to enter for sterilization and to be discharged after sterilization. The high-voltage electrode tube and the insulating medium tube are nested inside and outside and are coaxially arranged. The insulating medium tube is made of other insulating materials such as quartz glass and ceramics. The two ends of the insulating medium tube are coaxially supported and installed inside the ground electrode housing through an insulating support frame. The two insulating support frames are located between the two air inlets and outlets. The gap between the insulating medium tube and the ground electrode housing is shaped A sterilized air gap 44 is formed, a high-voltage pole is coaxially installed in the high-voltage pole tube, a high-voltage connecting spring sheet is installed on the high-voltage pole rod, the outer ring of the high-voltage connecting spring sheet abuts on the high-voltage pole tube, both ends of the high-voltage pole rod are extended from the insulating support frames at both ends, a high-voltage pole sealing and fastening insulating nut is installed on the high-voltage pole extending at one end, and the high-voltage pole sealing and fastening insulating nut is connected to the connecting boss 30 made of the earth pole body shell through a connecting spring, and a first high-voltage pole sealing and fastening nut abutting against the end of the insulating support frame and a T-shaped insulating spacer sleeve are sequentially installed on the high-voltage pole extending at the other end from the inside to the outside, a flange plate fixed by a spacer sleeve fastening nut is mounted on the insulating spacer sleeve, the flange plate is connected to the earth pole body shell through a flange fastening screw, a flange fastening nut 26 is connected to the flange fastening screw, and a second high-voltage pole sealing and fastening nut installed on the high-voltage pole is provided on the outside of the insulating spacer sleeve.

[0037] The earth pole body shell is a stainless steel one-piece structure, which includes an earth pole tube body 35, an end plate arranged at one end of the earth pole tube body, the outer diameter of the end plate is greater than or equal to the outer diameter of the earth pole tube body, a connecting boss for installing a connecting spring is arranged at the inner middle position of the end plate, and a flange structure with an outward flange is arranged at the other end of the earth pole tube body, and flange holes connected to the flange plate are arranged at intervals on the flange structure, and the air inlet and outlet are arranged at both ends of the tube body of the earth pole tube body. During specific assembly, a fastening clamp made of conductive material (such as stainless steel, etc.) is installed on the outside of the earth pole tube body, and the fastening nut of the fastening clamp is directly grounded or connected to the ground pole of the power supply; the power supply outputs an AC high-voltage signal, wherein the high-voltage pole is connected to the high-voltage pole rod through a wire, and the ground pole is directly grounded or connected to the earth pole body shell.

[0038] The insulating support frame is made of a material with good heat resistance, pressure resistance and insulation properties, such as polytetrafluoroethylene material. It is composed of a disc support part 46 and a cylindrical insertion part 47. A cylindrical insertion part is coaxially arranged at the inner center position of the disc support part. The cylindrical insertion part is inserted into the end of the high-voltage pole tube. Air-passing notches are arranged at intervals on the outer edge of the disc support part, and a through hole for inserting the high-voltage pole is provided in the middle of the cylindrical insertion part.

[0039] The high-voltage pole is made of conductive material and is as corrosion-resistant as possible, such as stainless steel. In order to facilitate assembly, it is designed as a two-stage structure, that is, it is composed of a high-voltage pole body 34 and a high-voltage pole top connection rod body 42. The high-voltage pole body is installed on the insulating support frame. The high-voltage pole body is a structure with external thread design, which is convenient for the connection of the high-voltage pole sealing and fastening insulating nut, the high-voltage connection spring fastening nut and the high-voltage pole sealing and fastening nut; the high-voltage pole top connection rod body is composed of a top connection disk and a through rod horizontally arranged at the center position of the rear part of the top connection disk. The through rod is a structure with a front end polished rod and a rear end threaded structure. The top connection disk of the high-voltage pole top connection rod body is top-connected to the end face of the high-voltage pole body. The polished rod part of the through rod of the high-voltage pole top connection rod body is installed in the insulating spacer sleeve, and the second high-voltage pole sealing and fastening nut is threadedly connected on the threaded part that passes through the insulating spacer sleeve.

[0040] The two-stage high-voltage pole structure can realize the modular assembly of the sterilization device, that is, the high-voltage pole body is assembled with the insulating medium tube, the high-voltage pole tube, the high-voltage connecting spring, the insulating support frame, the high-voltage pole sealing and fastening insulating nut and the connecting spring to form a sterilization module. When the whole is assembled, the sterilization module is assembled in the ground pole body shell, and then the flange, the insulating spacer sleeve and the second high-voltage pole are assembled, and the second high-voltage pole is connected to the first high-voltage pole. At the same time, this two-stage structure is also convenient for adapting to ground pole body shells of different lengths to meet sterilization requirements.

[0041] The high-voltage connection spring sheet is formed by bending a spring sheet, and includes a vertical insertion portion 49 and connection portions 48 inclined upward at the upper and lower ends of the vertical insertion portion. The vertical insertion portion is inserted into the high-voltage pole body of the high-voltage pole through a through hole set in the middle thereof, and high-voltage connection spring sheet fastening nuts 45 threadedly connected to the high-voltage pole are set at both ends of the vertical insertion portion, and the two connection portions are crimped on the inner wall of the high-voltage pole tube. A sealing gasket 40 for gas sealing is sandwiched between the ground pole body shell and the flange on the insulating spacer sleeve.

[0042] During operation, the contaminated gas is sucked into the liquid storage bottle through the rotary cutting needle, and enters the electric field sterilizer through the overflow prevention bottle for disinfection: under the action of the alternating electric field (the frequency of the alternating electric field is 30K Hz, the electric field strength is 2200V / mm, and the air flow speed is 3M / S), the air is sterilized and disinfected (when the earth electrode body shell is forcibly grounded and the high-voltage pole is connected to a high-voltage AC signal, an alternating electric field is formed in the disinfection air gap. When the external alternating electric field is greater than or equal to 2000V / mm, the air in the disinfection air gap will be ionized to generate plasma. If the gas in the disinfection air gap contains organisms such as bacteria and viruses, in the plasma state, the organisms will react with the oxygen in the air to generate carbon dioxide and water, thereby achieving sterilization and disinfection, and the single disinfection rate can reach 99.99%), the sterilized air is discharged from the gas outlet, and finally discharged into the atmosphere by the muffler of the multi-stage vacuum pump group.

[0043] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A multi-stage flow rate negative pressure suction device with sterilization function, characterized in that: The invention comprises a casing and a negative pressure unit, wherein the negative pressure unit comprises a multi-stage vacuum pump group, a buffer bottle, a flow meter, an electric field sterilizer, a multi-way pipeline, a pressure regulating valve and a liquid storage bottle. The multi-stage vacuum pump group is installed on the inner bottom plate of the casing, the negative pressure interface of the multi-stage vacuum pump group is connected to the negative pressure outlet of the buffer bottle through a pipeline, the negative pressure inlet of the buffer bottle is connected to the gas outlet of the electric field sterilizer through a pipeline installed with a flow meter, a multi-way pipeline is connected to the gas inlet of the electric field sterilizer, a branch of the multi-way pipeline is connected to the liquid storage bottle through an electromagnetic valve, and a branch of the multi-way pipeline is connected to the pressure regulating valve installed on the casing.

2. A multi-stage flow rate negative pressure suction device with sterilization function according to claim 1, characterized in that: It also includes an anti-overflow bottle, which is connected between the solenoid valve and the liquid storage bottle on the branch of the multi-channel pipeline.

3. A multi-stage flow rate negative pressure suction device with sterilization function according to claim 2, characterized in that: There are two liquid storage bottles and two anti-overflow bottles, and the multi-way pipe is a four-way pipe. The first branch of the four-way pipe is connected to the electric field sterilizer, the second branch of the four-way pipe is connected to the pressure regulating valve, the third branch of the four-way pipe is connected to the first anti-overflow bottle through the pipe installed with the first solenoid valve, and the fourth branch of the four-way pipe is connected to the second anti-overflow bottle through the pipe installed with the second solenoid valve.

4. A multi-stage flow rate negative pressure suction device with sterilization function according to claim 1, characterized in that: The multi-stage vacuum pump group includes four vacuum pumps, a solenoid valve, a manifold and a muffler. A negative pressure interface is provided on the upper end surface of the manifold, and four interfaces are provided at intervals on the lower end surface of the manifold. A vacuum pump connected to a solenoid valve is installed on each interface, and a muffler is installed on each of the four vacuum pumps.

5. The multi-stage flow rate negative pressure suction device with sterilization function according to claim 1, characterized in that: It also includes a peristaltic pump and a liquid bag. The peristaltic pump is installed on the front end surface of the housing, one end of the peristaltic pump is connected to the liquid bag through a pipeline, and the other end of the peristaltic pump is connected to the operating equipment through a pipeline.

6. A multi-stage flow rate negative pressure suction device with sterilization function according to claim 1, characterized in that: The electric field sterilizer comprises a geodetic body shell, an insulating support frame, an insulating medium tube, a high-voltage electrode tube, a high-voltage electrode rod and a high-voltage connecting spring sheet. A gas inlet and a gas outlet are respectively arranged at the two ends of the geodetic body shell. An insulating medium tube is installed inside the geodetic body shell through the insulating support frame. The gap between the insulating medium tube and the geodetic body shell forms a disinfection air gap. A high-voltage electrode tube is coaxially sleeved inside the insulating medium tube. A high-voltage electrode rod is inserted inside the high-voltage electrode tube. A high-voltage connecting spring sheet with an edge abutting against the high-voltage electrode tube is installed on the high-voltage electrode rod. One end of the high-voltage electrode rod extends out from one end of the geodetic body shell. A wire connected to a power board is connected to the extended high-voltage electrode rod.

7. A multi-stage flow rate negative pressure suction device with sterilization function according to claim 6, characterized in that: The insulating support frame is composed of a disc support part and a cylindrical insertion part. The cylindrical insertion part is coaxially arranged at the inner center position of the disc support part. The cylindrical insertion part is inserted into the end of the high-voltage pole tube. Air-passing notches are arranged at intervals on the outer edge of the disc support part, and a through hole for inserting the high-voltage pole is provided in the middle of the cylindrical insertion part.

8. The multi-stage flow rate negative pressure suction device with sterilization function according to claim 6, characterized in that: The high-voltage connecting spring sheet is formed by bending a spring sheet, and includes a vertical penetration portion and upwardly inclined connecting portions at the upper and lower ends of the vertical penetration portion. The vertical penetration portion is penetrated on the high-voltage pole through a through hole arranged in the middle thereof, and high-voltage connecting spring sheet fastening nuts threadedly connected to the high-voltage pole are arranged at both ends of the vertical penetration portion, and the two connecting portions are crimped on the inner wall of the high-voltage pole tube.

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