Multistage flow negative pressure aspirator with sterilization function

Abstract

The utility model belongs to the technical field of medical instruments, and relates to a multistage flow negative pressure aspirator with a sterilization function, which comprises a casing 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 mounted in the casing, and the buffer bottle is mounted in the casing. 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 utility model has the advantages of scientific and reasonable design, adjustable flow and pressure, safety and reliability, reduction of pathogen transmission, and easy realization.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology and relates to an aspirator, specifically a multi-stage flow negative pressure aspirator with sterilization function. Background Technology

[0002] Medical negative pressure suction devices are used in various medical institutions to remove bleeding, exudate, pus, and contents of thoracic organs during surgery, making the surgery clearer and reducing the chance of contamination.

[0003] Existing suction devices typically contain a vacuum pump. When used in puncture biopsy excision procedures, the pressure provided by the existing vacuum pump is insufficient due to the small diameter of the excision needle used for puncture biopsy, thus affecting the effectiveness of the excision procedure.

[0004] In addition, if the suction device is used on patients with infectious diseases, while suctioning the residual fluid through negative pressure, it will also suction the gas containing viruses and bacteria. If the suctioned gas is released directly into the atmosphere without treatment, it will fill the air with viruses and bacteria, posing a threat to the health of people around. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a multi-stage flow negative pressure aspirator with sterilization function that is adjustable in flow rate and pressure, safe and reliable, reduces the spread of germs, and is easy to implement.

[0006] The technical problem solved by this utility model is achieved through the following technical solution:

[0007] A multi-stage flow negative pressure aspirator with sterilization function is characterized by comprising a housing and a negative pressure unit. The negative pressure unit includes a multi-stage vacuum pump assembly, a buffer bottle, a flow meter, an electric field sterilizer, a multi-way pipeline, a pressure regulating valve, and a storage bottle. The multi-stage vacuum pump assembly is installed on the inner bottom plate of the housing. The negative pressure interface of the multi-stage vacuum pump assembly 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 with the flow meter installed. A multi-way pipeline is connected to the gas inlet of the electric field sterilizer. One branch of the multi-way pipeline is connected to the storage bottle through a solenoid valve, and another branch of the multi-way pipeline is connected to the pressure regulating valve installed on the housing.

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

[0009] Moreover, the liquid storage bottle and the anti-overflow bottle are both two, the multi-way pipeline is a four-way pipeline, the first branch of the four-way pipeline is connected with the electric field sterilizer, the second branch of the four-way pipeline is connected with the pressure regulating valve, the third branch of the four-way pipeline is connected with the first anti-overflow bottle through the pipeline with the first electromagnetic valve, and the fourth branch of the four-way pipeline is connected with the second anti-overflow bottle through the pipeline with the second electromagnetic valve.

[0010] Moreover, the multi-stage vacuum pump set comprises four vacuum pumps, electromagnetic valves, a manifold and a silencer, a negative pressure interface is arranged on the upper end face of the manifold, four interfaces are arranged on the lower end face of the manifold at intervals, a vacuum pump connected with an electromagnetic valve is arranged on each interface, and a silencer is arranged on each of the four vacuum pumps.

[0011] Moreover, the multi-stage vacuum pump set comprises four vacuum pumps, electromagnetic valves, a manifold and a silencer, a negative pressure interface is arranged on the upper end face of the manifold, four interfaces are arranged on the lower end face of the manifold at intervals, a vacuum pump connected with an electromagnetic valve is arranged on each interface, and a silencer is arranged on each of the four vacuum pumps.

[0012] Moreover, the electric field sterilizer comprises a ground pole body shell, an insulating support frame, an insulating medium pipe, a high-voltage pole pipe, a high-voltage pole rod and a high-voltage connecting spring sheet, a gas inlet and a gas outlet are arranged at two ends of the ground pole body shell respectively, the insulating medium pipe is arranged in the ground pole body shell through the insulating support frame, a sterilization gas gap is formed between the insulating medium pipe and the ground pole body shell, the high-voltage pole pipe is coaxially sleeved in the insulating medium pipe, the high-voltage pole rod is arranged in the high-voltage pole pipe, and the high-voltage connecting spring sheet is arranged on the high-voltage pole rod and abuts against the high-voltage pole pipe, one end of the high-voltage pole rod is arranged to protrude from one end of the ground pole body shell, and a wire connected to a power panel is arranged on the protruding high-voltage pole rod.

[0013] Moreover, the insulating support frame comprises a disc support part and a cylindrical plug-in part, the cylindrical plug-in part is coaxially arranged at the inside center position of the disc support part, the cylindrical plug-in part is plugged into the end part of the high-voltage pole pipe, air gap notches are arranged on the outer edge of the disc support part at intervals, and a through hole for arranging the high-voltage pole rod is arranged in the middle part of the cylindrical plug-in part.

[0014] Moreover, the high-voltage connecting spring sheet is bent from one spring sheet and comprises a vertical plug-in part and two connecting parts which are inclined upward at the upper and lower ends of the vertical plug-in part, the vertical plug-in part is plugged into the high-voltage pole rod through the through hole arranged in the middle part, high-voltage connecting spring sheet fastening nuts are arranged at the two ends of the vertical plug-in part and are screwed on the high-voltage pole rod, and the two connecting parts are press-connected to the inner wall of the high-voltage pole pipe.

[0015] The utility model discloses the advantages and positive effects are:

[0016] 1. The multi-stage flow negative pressure aspirator with sterilization function, through the setting of the multi-stage vacuum pump set, the adjustable flow is realized, according to the use requirement, the opening number of the vacuum pump is controlled through the electromagnetic valve connected with each vacuum pump, the negative pressure flow is adjusted, through the setting of the pressure regulating valve, the adjustable negative pressure pressure is realized, through the setting of the electric field sterilizer on the negative pressure pipeline, the gas of the negative pressure aspiration can be sterilized and filtered, the bacteria in the gas is killed and then discharged into the atmosphere, the spread of the bacteria is avoided.

[0017] 2. The multi-stage flow negative pressure aspirator with sterilization function, through the setting of the anti-overflow bottle, the problem that the aspirated liquid in the liquid storage bottle overflows into the vacuum pump is avoided, the service life of the equipment is prolonged, and the failure rate is reduced.

[0018] 3. The multi-stage flow negative pressure aspirator with sterilization function, through the design of the liquid storage bottle as two, the liquid storage capacity is increased, and the operation of stopping and replacing the liquid storage bottle due to liquid fullness is avoided.

[0019] 4. The utility model discloses the scientific and reasonable design has the advantages of flow pressure adjustable, safe and reliable, reduce the spread of bacteria, easy to realize, and is a kind of multi-stage flow negative pressure aspirator with sterilization function with higher innovation. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the perspective view of the utility model;

[0021] Figure 2 It is the structure schematic view of the internal structure in the schematic case of the utility model;

[0022] Figure 3 It is the structure schematic view of the negative pressure unit of the utility model;

[0023] Figure 4 It is the structure schematic view of electric field sterilizer;

[0024] Figure 5 It is the sectional view of electric field sterilizer of the utility model;

[0025] Figure 6 It is the structure schematic view of the insulating support frame of electric field sterilizer of the utility model;

[0026] Figure 7 It is the structure schematic view of the high-pressure connecting spring sheet of electric field sterilizer of the utility model;

[0027] Figure 8 It is the working principle diagram of the utility model.

[0028] BRIEF DESCRIPTION OF DRAWINGS

[0029] 1-peristaltic pump, 2-second liquid storage bottle, 3-foot switch, 4-rotary cutting needle, 5-first liquid storage bottle, 6-casing, 7-pressure regulating valve, 8-buffer bottle, 9-first overflow prevention bottle, 10-multistage vacuum pump set, 11-flow meter, 12-power panel, 13-electric field sterilizer, 14-silencer, 15-vacuum pump, 16-converging pipe, 17-first electromagnetic valve, 18-four-way pipe, 19-negative pressure interface, 20-second overflow prevention bottle, 21-second electromagnetic valve, 22-gas inlet, 23-ground pole outer shell, 24-gas outlet, 25-flange, 26-flange fastening nut, 27-separation sleeve fastening nut, 28-second high voltage pole sealing fastening nut, 29-high voltage pole, 30-connecting boss, 31-connecting spring, 32-high voltage pole sealing fastening insulation nut, 33-insulation support frame, 34-high voltage pole body, 35-ground pole body, 36-high voltage connecting spring sheet, 37-insulation medium pipe, 38-high voltage pole pipe, 39-flange fastening screw, 40-sealing gasket, 41-insulation separation sleeve, 42-high voltage pole top connecting rod body, 43-first high voltage pole sealing fastening nut, 44-sterilization air gap, 45-high voltage connecting spring sheet fastening nut, 46-disc support part, 47-cylinder plug-in part, 48-connecting part, 49-vertical through part. DETAILED DESCRIPTION

[0030] The embodiments of the utility model will be further described in combination with the drawings:

[0031] A multistage flow negative pressure aspirator with sterilization function, the utility model discloses a casing 6 and negative pressure unit, the negative pressure unit includes multistage vacuum pump set 10, the buffer bottle 8 of stabilizing pressure function, flow meter 11, electric field sterilizer 13, multichannel pipeline, pressure regulating valve 7 and liquid storage bottle, install multistage vacuum pump set on the inside bottom plate of casing, connect the negative pressure outlet of buffer bottle through pipeline on the negative pressure interface 19 of multistage vacuum pump set, and the negative pressure import of buffer bottle is connected the gas outlet 24 of electric field sterilizer through the pipeline of installing flow meter, and a multichannel pipeline is connected at the gas inlet 22 of electric field sterilizer, and one branch of multichannel pipeline is connected to the liquid storage bottle through electromagnetic valve, and one branch of multichannel pipeline is connected to the pressure regulating valve installed on the casing, and the electric field sterilizer is installed on the power panel 12, and also include overflow prevention bottle, and the electromagnetic valve is connected with the overflow prevention bottle between the branch of multichannel pipeline and the liquid storage bottle.

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

[0033] The multi-stage vacuum pump group comprises four vacuum pumps 15, electromagnetic valves, a confluence pipe 16 and silencers 14, a negative pressure interface is arranged on the upper end surface of the confluence pipe, four interfaces are arranged on the lower end surface of the confluence pipe at intervals, a vacuum pump connected with an electromagnetic valve is arranged on each interface, and a silencer is arranged on each of the four vacuum pumps.

[0034] In the process of the rotary cutting operation, the negative pressure adsorption can adsorb the lesion tissue into the rotary cutting hole of the rotary cutting needle, in order to facilitate the observation of the rotary cutting, the negative pressure needs to be repeatedly opened and closed to suck the tissue in more positions for observation, but the negative pressure closing cannot release the sucked tissue from the rotary cutting hole, and the observation effect is affected.

[0035] In the process of the rotary cutting operation, the negative pressure adsorption can adsorb the lesion tissue into the rotary cutting hole of the rotary cutting needle, in order to facilitate the observation of the rotary cutting, the negative pressure needs to be repeatedly opened and closed to suck the tissue in more positions for observation, but the negative pressure closing cannot release the sucked tissue from the rotary cutting hole, and the observation effect is affected.

[0036] The electric field sterilizer comprises a ground electrode body shell 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 fastening insulating nut 32, a connecting spring 31, a first high-voltage electrode sealing fastening nut 43, an insulating spacer sleeve 41, a flange plate 25, a flange fastening screw 39, a spacer sleeve fastening nut 27 and a second high-voltage electrode sealing fastening nut 28, gas inlets and outlets are arranged at two ends of the ground electrode body shell respectively for air entering sterilization and being discharged after sterilization, the high-voltage electrode tube is coaxially arranged in and outside the insulating medium tube, the insulating medium tube is made of quartz glass, ceramic or other insulating materials, two ends of the insulating medium tube are coaxially supported and installed in the ground electrode body shell through the insulating support frames, the two insulating support frames are located between the two air inlets and outlets, a sterilization air gap 44 is formed between the insulating medium tube and the ground electrode body shell, the high-voltage electrode rod is coaxially arranged in the high-voltage electrode tube, the high-voltage connecting spring sheet is arranged on the high-voltage electrode rod, the outer ring of the high-voltage connecting spring sheet abuts against the high-voltage electrode tube, two ends of the high-voltage electrode rod are both extended out through the two insulating support frames, the high-voltage electrode sealing fastening insulating nut is installed on the high-voltage electrode rod extended out at one end, the high-voltage electrode sealing fastening insulating nut is connected to the connecting boss 30 of the ground electrode body shell through the connecting spring, the first high-voltage electrode sealing fastening nut abutting against the end of the insulating support frame and the T-shaped insulating spacer sleeve are sequentially installed on the high-voltage electrode rod extended out at the other end from inside to outside, the flange plate is sleeved on the insulating spacer sleeve and fixed by the spacer sleeve fastening nut, the flange plate is connected to the ground electrode body shell through the flange fastening screw, the flange fastening screw is connected to the flange fastening nut 26, and the second high-voltage electrode sealing fastening nut is arranged outside the insulating spacer sleeve and installed on the high-voltage electrode rod.

[0037] The ground electrode body shell is integrally formed of stainless steel and comprises a ground electrode tube body 35, an end plate arranged at one end of the ground electrode tube body, the outer diameter of the end plate is greater than or equal to the outer diameter of the ground electrode tube body, a connecting boss for installing the connecting spring is arranged at the middle position of the inner side of the end plate, an outwardly turned edge structure is arranged at the other end of the ground electrode tube body, flange holes connected to the flange plate are arranged at the turned edge structure in intervals, and the air inlets and outlets are arranged at two ends of the tube body of the ground electrode tube body.

[0038] The insulating support frame is made of a material with good heat resistance, voltage resistance and insulation, such as polytetrafluoroethylene material, which is composed of a disc support part 46 and a cylindrical insertion part 47. The cylindrical insertion part is coaxially arranged at the inner center of the disc support part, is inserted into the end of the high-voltage pole tube, and is provided with a gas passage gap at the outer edge of the disc support part. The cylindrical insertion part is provided with a through hole for inserting the high-voltage pole rod in the middle part.

[0039] The high-voltage pole rod is made of a conductive material, such as stainless steel material, which is designed as a two-section structure for easy assembly. The high-voltage pole rod is composed of a high-voltage pole rod body 34 and a high-voltage pole top connecting rod body 42. The high-voltage pole rod body is inserted into the insulating support frame and is provided with external threads for connecting the high-voltage pole sealing fastening insulating nut, the high-voltage connecting spring fastening nut, and the high-voltage pole sealing fastening nut. The high-voltage pole top connecting rod body is composed of a top connecting disc and a through rod arranged horizontally at the center of the rear part of the top connecting disc. The through rod is provided with a light rod at the front end and a thread at the rear end. The top connecting disc of the high-voltage pole top connecting rod body is connected to the end face of the high-voltage pole rod body. The light rod part of the through rod of the high-voltage pole top connecting rod body is inserted into the insulating spacer sleeve, and the threaded part of the through rod that protrudes out of the insulating spacer sleeve is connected with the second high-voltage pole sealing fastening nut.

[0040] The two-section high-voltage pole rod structure can realize modular assembly of the sterilization device. The high-voltage pole rod body, the insulating medium tube, the high-voltage pole tube, the high-voltage connecting spring, the insulating support frame, the high-voltage pole sealing fastening insulating nut, and the connecting spring are assembled into one sterilization module. During overall assembly, the sterilization module is assembled into the ground pole body shell, and then the flange plate, the insulating spacer sleeve, and the second high-voltage pole rod are assembled. The second high-voltage pole rod is connected to the first high-voltage pole rod. At the same time, the two-section structure is convenient for adapting to different lengths of the ground pole body shell and meets the sterilization requirements.

[0041] The high-voltage connecting spring sheet is bent from a spring sheet and is composed of a vertical insertion part 49 and two connecting parts 48 that are inclined upward at the upper and lower ends of the vertical insertion part. The vertical insertion part is inserted into the high-voltage pole rod body of the high-voltage pole rod through the through hole arranged in the middle part. The high-voltage connecting spring sheet fastening nuts 45 are arranged at the two ends of the vertical insertion part and are connected to the high-voltage pole rod by threads. The two connecting parts are crimped to the inner wall of the high-voltage pole tube. The sealing gasket 40 for gas sealing is arranged between the insulating spacer sleeve and the ground pole body shell of the flange plate.

[0042] In operation, the bacteria-containing gas is sucked into the liquid storage bottle through the rotary cutting needle, and is sterilized in the electric field sterilizer through the anti-overflow bottle: under the action of the alternating electric field (the frequency of the alternating electric field is 30 KHz, the electric field strength is 2200 V / mm, and the air flow speed is 3 M / S), the air is sterilized (when the ground electrode body is forcedly grounded, and the high-voltage electrode rod is connected with the high-voltage alternating current signal, the alternating electric field is formed in the sterilization air gap, when the external alternating electric field is greater than or equal to 2000 V / mm, the air in the sterilization air gap is ionized to generate plasma, if the gas in the sterilization air gap contains bacteria, viruses and other organisms, the organisms will react with the oxygen in the air in the plasma state to generate carbon dioxide and water, thereby achieving sterilization, and the single sterilization rate can reach 99.99%), the sterilized air is discharged from the gas outlet, and finally is discharged into the atmosphere through the silencer of the multi-stage vacuum pump set.

[0043] Although the embodiments and drawings of the utility model are disclosed for the purpose of illustration, those skilled in the art can understand that various substitutions, changes and modifications are possible without departing from the spirit and scope of the utility model and the appended claims, therefore, the scope of the utility model is not limited to the content disclosed in the embodiments and drawings.

Claims

1. A multi-stage flow negative pressure aspirator with sterilization function, characterized in that: The utility model provides a kind of negative pressure device, including shell and negative pressure unit, the negative pressure unit includes multistage vacuum pump group, buffer bottle, flowmeter, electric field sterilizer, multi-way pipeline, pressure regulating valve and liquid storage bottle, multistage vacuum pump group is installed on the inside bottom plate of the shell, the negative pressure interface of multistage vacuum pump group is connected with the negative pressure outlet of buffer bottle by pipeline, the negative pressure inlet of buffer bottle is connected with the gas outlet of electric field sterilizer by the pipeline of installing flowmeter, a branch of multi-way pipeline is connected to the liquid storage bottle by electromagnetic valve, a branch of multi-way pipeline is connected to the pressure regulating valve installed on shell.

2. The multi-stage flow negative pressure aspirator with sterilization function according to claim 1, characterized in that: It also includes anti-overflow bottle, and the electromagnetic valve and the liquid storage bottle are connected by anti-overflow bottle between a branch of the multi-way pipeline.

3. The multi-stage flow negative pressure aspirator with sterilization function according to claim 2, characterized in that: The utility model discloses a kind of negative pressure device, including shell and negative pressure unit, the negative pressure unit includes multistage vacuum pump group, buffer bottle, flowmeter, electric field sterilizer, multi-way pipeline, pressure regulating valve and liquid storage bottle, multistage vacuum pump group is installed on the inside bottom plate of the shell, the negative pressure interface of multistage vacuum pump group is connected with the negative pressure outlet of buffer bottle by pipeline, the negative pressure inlet of buffer bottle is connected with the gas outlet of electric field sterilizer by the pipeline of installing flowmeter, a branch of multi-way pipeline is connected to the liquid storage bottle by electromagnetic valve, a branch of multi-way pipeline is connected to the pressure regulating valve installed on shell.

4. The multi-stage flow negative pressure aspirator with sterilization function according to claim 1, characterized in that: The utility model discloses a kind of negative pressure device, including shell and negative pressure unit, the negative pressure unit includes multistage vacuum pump group, buffer bottle, flowmeter, electric field sterilizer, multi-way pipeline, pressure regulating valve and liquid storage bottle, multistage vacuum pump group is installed on the inside bottom plate of the shell, the negative pressure interface of multistage vacuum pump group is connected with the negative pressure outlet of buffer bottle by pipeline, the negative pressure inlet of buffer bottle is connected with the gas outlet of electric field sterilizer by the pipeline of installing flowmeter, a branch of multi-way pipeline is connected to the liquid storage bottle by electromagnetic valve, a branch of multi-way pipeline is connected to the pressure regulating valve installed on shell.

5. The multi-stage flow negative pressure aspirator with sterilization function according to claim 1, characterized in that: The utility model discloses a kind of negative pressure device, including shell and negative pressure unit, the negative pressure unit includes multistage vacuum pump group, buffer bottle, flowmeter, electric field sterilizer, multi-way pipeline, pressure regulating valve and liquid storage bottle, multistage vacuum pump group is installed on the inside bottom plate of the shell, the negative pressure interface of multistage vacuum pump group is connected with the negative pressure outlet of buffer bottle by pipeline, the negative pressure inlet of buffer bottle is connected with the gas outlet of electric field sterilizer by the pipeline of installing flowmeter, a branch of multi-way pipeline is connected to the liquid storage bottle by electromagnetic valve, a branch of multi-way pipeline is connected to the pressure regulating valve installed on shell.

6. The multi-stage flow negative pressure aspirator with sterilization function according to claim 1, characterized in that: The utility model discloses a kind of negative pressure device, including shell and negative pressure unit, the negative pressure unit includes multistage vacuum pump group, buffer bottle, flowmeter, electric field sterilizer, multi-way pipeline, pressure regulating valve and liquid storage bottle, multistage vacuum pump group is installed on the inside bottom plate of the shell, the negative pressure interface of multistage vacuum pump group is connected with the negative pressure outlet of buffer bottle by pipeline, the negative pressure inlet of buffer bottle is connected with the gas outlet of electric field sterilizer by the pipeline of installing flowmeter, a branch of multi-way pipeline is connected to the liquid storage bottle by electromagnetic valve, a branch of multi-way pipeline is connected to the pressure regulating valve installed on shell.

7. The multi-stage flow negative pressure aspirator with sterilization function according to claim 6, characterized in that: The utility model discloses a kind of negative pressure device, including shell and negative pressure unit, the negative pressure unit includes multistage vacuum pump group, buffer bottle, flowmeter, electric field sterilizer, multi-way pipeline, pressure regulating valve and liquid storage bottle, multistage vacuum pump group is installed on the inside bottom plate of the shell, the negative pressure interface of multistage vacuum pump group is connected with the negative pressure outlet of buffer bottle by pipeline, the negative pressure inlet of buffer bottle is connected with the gas outlet of electric field sterilizer by the pipeline of installing flowmeter, a branch of multi-way pipeline is connected to the liquid storage bottle by electromagnetic valve, a branch of multi-way pipeline is connected to the pressure regulating valve installed on shell.

8. The multi-stage flow negative pressure aspirator with sterilization function according to claim 6, characterized in that: ​

Images