CN112891653A

CN112891653A - Sputum suction device

Info

Publication number: CN112891653A
Application number: CN202110250690.6A
Authority: CN
Inventors: 黄翠麦; 王建源; 陆启祥; 李燕飞; 黄明凤
Original assignee: Youjiang Medical University for Nationalities Affiliated Hospital
Current assignee: Youjiang Medical University for Nationalities Affiliated Hospital
Priority date: 2021-03-08
Filing date: 2021-03-08
Publication date: 2021-06-04

Abstract

The invention discloses a sputum suction device which comprises a piston type negative pressure cylinder, wherein the piston type negative pressure cylinder comprises a connecting plate, one side of the connecting plate is fixedly provided with the negative pressure cylinder, and a piston is connected in the negative pressure cylinder in a sliding manner; one end of the negative pressure cylinder, which is far away from the connecting plate, is communicated with a sputum collecting part, and a sputum suction pipe is communicated with the sputum collecting part; one side of the connecting plate, which is far away from the negative pressure cylinder, is provided with a driving part, and the driving part is in transmission connection with the piston. According to the invention, the piston type negative pressure cylinder is driven by the driving part, so that the sputum suction work can be realized by only holding the position of the sputum suction hose with one hand of a medical worker, and the operation is convenient; the piston of the piston type negative pressure cylinder can realize sputum suction in the pushing and pulling processes, the action is smooth, and the sputum suction efficiency is improved; moreover, the sputum backflow condition in the sputum suction device can be avoided by the arrangement of the sputum collecting part; and through will inhale the phlegm pipe and separate for the binary channels, can in time clear up the sputum that blocks up and inhale the phlegm pipe, very big improvement inhale the effect and the progress of phlegm treatment to the patient.

Description

Sputum suction device

Technical Field

The invention relates to the technical field of medical equipment, in particular to a sputum suction device.

Background

In some respiratory cases, the patient may suffocate due to sputum blocking in the respiratory tract, which is very dangerous and requires rapid treatment, and sputum aspiration is very important.

However, when the existing piston type sputum suction auxiliary device is used by medical staff, one hand is needed to keep the position of the sputum suction hose still, the other hand is needed to pull out the piston to suck sputum, and the piston is difficult to pull out by one hand, so that the operation is inconvenient; the piston can suck phlegm only when pulled out, the action is not smooth, the efficiency is low, and the patient is easy to feel pain; but also the situation of sputum backflow inside the sputum suction device can occur, which causes serious influence on the use of the sputum suction device; when medical personnel inhales the phlegm treatment for the patient in addition, the internal thick sputum of patient can the adhesion on the inner wall of inhaling the phlegm pipe, and then causes to inhale the phlegm pipe and block up, very big influence the patient and inhaled effect and the progress of phlegm treatment.

Disclosure of Invention

The invention aims to provide a sputum aspirator to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following scheme: the invention provides a sputum suction device, which comprises a piston type negative pressure cylinder, wherein the piston type negative pressure cylinder comprises a connecting plate, one side of the connecting plate is fixedly provided with a negative pressure cylinder, and a piston is connected in the negative pressure cylinder in a sliding way; one end of the negative pressure cylinder, which is far away from the connecting plate, is communicated with a sputum collecting part, and a sputum suction pipe is communicated with the sputum collecting part; one side of the connecting plate, which is far away from the negative pressure cylinder, is provided with a driving part, and the driving part is in transmission connection with the piston.

Preferably, the negative pressure cylinder comprises an inner cylinder and an outer cylinder, the outer cylinder is sleeved outside the inner cylinder, and a cylinder opening of the inner cylinder and a cylinder opening of the outer cylinder are both fixedly connected with the connecting plate; one end of the outer barrel, which is far away from the connecting plate, is communicated with a connecting pipe, and the sputum collecting part is communicated with the outer barrel through the connecting pipe; the outer wall of the inner barrel is fixedly connected with four communicating pipes which are divided into two first communicating pipes and two second communicating pipes; the two first communication pipes are respectively positioned at two ends of the inner barrel, and the inner cavity of the inner barrel is communicated with the inner cavity of the outer barrel through the first communication pipes; the two second communicating pipes are respectively positioned at two ends of the inner barrel, the second communicating pipes are arranged corresponding to the first communicating pipes, and the tail ends of the second communicating pipes penetrate through the outer barrel and extend out of the outer side of the outer barrel; the piston is arranged in the inner cylinder, the piston head of the piston is connected with the cylinder wall of the inner cylinder in a sliding manner, and the piston head of the piston is positioned between the two first communication pipes; first check valves are arranged in the first communicating pipe and the second communicating pipe respectively.

Preferably, the first check valve comprises a limiting plate fixedly connected with the inner wall of the communicating pipe, a through hole is formed in the middle of the limiting plate, a connecting column is connected in the through hole in a sliding mode, a plugging plate is fixedly connected to the top end of the connecting column, a mounting plate is fixedly connected to the bottom end of the connecting column, a spring is sleeved on the connecting column, and two ends of the spring are respectively and fixedly connected with the mounting plate and the limiting plate; the limiting plate is provided with an air hole, the bottom end of the blocking plate is fixedly connected with a blocking column, and the blocking column corresponds to the air hole.

Preferably, the driving part comprises a shell fixedly connected with the connecting plate, a sliding rod is fixedly connected to the top end inside the shell, a sliding sleeve is slidably sleeved on the sliding rod, and a plate frame is fixedly connected to the bottom end of the sliding sleeve; toothed plates are fixedly connected to the top end and the bottom end of the inner side of the plate frame, a motor is fixedly connected to the inner wall of the shell, a half gear is fixedly connected to an output shaft of the motor, and the half gear is meshed with the toothed plates; a push rod of the piston penetrates through the connecting plate to be fixedly connected with the plate frame, and the push rod of the piston is connected with the connecting plate in a sliding manner; an inlet and an outlet are formed in one side, far away from the connecting plate, of the shell, and the plate frame is matched with the inlet and the outlet.

Preferably, the sputum collecting part comprises a collecting box, a collecting port is formed in the bottom of the collecting box, the collecting box is detachably connected with a sputum collecting bottle through the collecting port, and the connecting pipe and the sputum suction pipe are communicated with the collecting box.

Preferably, an impeller is rotatably connected in the connecting pipe, a worm is fixedly connected in the middle of the impeller, a rotating shaft is rotatably connected at the top of the collecting box, a worm wheel is fixedly sleeved on the rotating shaft, and the worm wheel is matched with the worm; the rotary shaft bottom is fixedly connected with an auger blade, the auger blade is positioned below the worm wheel, and the auger blade extends into the sputum collecting bottle.

Preferably, a baffle is arranged in the collection box, the top end of the baffle is fixedly connected with the collection box, the baffle is arranged corresponding to the sputum suction tube, and one end of the worm, which is far away from the impeller, is rotatably connected with the baffle.

Preferably, a partition plate is arranged in the sputum suction pipe along the length direction of the sputum suction pipe, the partition plate divides the sputum suction pipe into a sputum suction channel and a ventilation channel, a second one-way valve is installed at the inlet end of the sputum suction channel, a third one-way valve is installed in the ventilation channel, and the third one-way valve is located between the second one-way valve and the sputum collection part; the partition plate is provided with a vent hole, and the vent hole is positioned between the second one-way valve and the third one-way valve; the tail end of the second communicating pipe is communicated with an air supply pipe, and the tail end of the air supply pipe is communicated with the ventilation channel; and an electromagnetic directional valve is arranged on the air supply pipe between the second communicating pipe and the ventilation channel.

Preferably, the connecting pipe is provided with a pressure gauge, and the pressure gauge is electrically connected with the electromagnetic directional valve.

Preferably, the first check valve, the second check valve and the third check valve have the same structure.

The invention discloses the following technical effects: according to the sputum suction device provided by the invention, the piston type negative pressure cylinder is driven by the driving part, so that the sputum suction work can be realized by a medical worker only needing to keep the position of the sputum suction hose still with one hand, and the operation is convenient; the piston of the piston type negative pressure cylinder can realize sputum suction in the pushing and pulling processes, the action is smooth, and the sputum suction efficiency is improved; moreover, the sputum backflow condition in the sputum suction device can be avoided by the arrangement of the sputum collecting part; and through will inhale the phlegm pipe and separate for the binary channels, can in time clear up the sputum that blocks up and inhale the phlegm pipe, very big improvement inhale the effect and the progress of phlegm treatment to the patient.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

FIG. 1 is a schematic view of the sputum aspirator of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is an enlarged view of a portion B of FIG. 1;

FIG. 4 is an enlarged view of a portion C of FIG. 1;

wherein, the connecting plate-1; a piston-2; a sputum suction tube-3; an inner cylinder-4; an outer cylinder-5; a connecting pipe-6; a first communicating pipe-7; a second communicating tube-8; a limiting plate-9; connecting a column-10; a plugging plate-11; a mounting plate-12; a spring-13; a plugging column-14; a housing-15; a slide bar-16; a sliding sleeve-17; a plate frame-18; a toothed plate-19; motor-20; half gear-21; a collection tank-22; a sputum collection bottle-23; an impeller-24; a worm-25; a worm gear-26; a rotating shaft-27; a packing auger blade-28; a baffle-29; a separator-30; sputum aspiration channel-31; -a vent passage-32; a second check valve-33; a third one-way valve-34; a gas supply pipe-35; an electromagnetic directional valve-36; pressure gauge-37.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

The invention provides a sputum suction device, which comprises a piston type negative pressure cylinder, wherein the piston type negative pressure cylinder comprises a connecting plate 1, the negative pressure cylinder is fixedly installed on one side of the connecting plate 1, and a piston 2 is connected in the negative pressure cylinder in a sliding manner; one end of the negative pressure cylinder, which is far away from the connecting plate 1, is communicated with a sputum collection part, and a sputum suction pipe 3 is communicated with the sputum collection part; one side of the connecting plate 1, which is far away from the negative pressure cylinder, is provided with a driving part, and the driving part is in transmission connection with the piston 2.

Further, the negative pressure cylinder comprises an inner cylinder 4 and an outer cylinder 5, the outer cylinder 5 is sleeved outside the inner cylinder 4, and a cylinder opening of the inner cylinder 4 and a cylinder opening of the outer cylinder 5 are both fixedly connected with the connecting plate 1; one end of the outer barrel 5, which is far away from the connecting plate 1, is communicated with a connecting pipe 6, and the sputum collecting part is communicated with the outer barrel 5 through the connecting pipe 6; four communicating pipes are fixedly connected to the outer wall of the inner barrel 4, and the four communicating pipes are divided into two first communicating pipes 7 and two second communicating pipes 8; the two first communication pipes 7 are respectively positioned at two ends of the inner cylinder 4, and the inner cavity of the inner cylinder 4 is communicated with the inner cavity of the outer cylinder 5 through the first communication pipes 7; the two second communicating pipes 8 are respectively positioned at two ends of the inner barrel 4, the second communicating pipes 8 are arranged corresponding to the first communicating pipes 7, and the tail ends of the second communicating pipes 8 penetrate through the outer barrel 5 and extend out of the outer barrel 5; the piston 2 is arranged in the inner cylinder 4, the piston head of the piston 2 is in sliding connection with the cylinder wall of the inner cylinder 4, and the piston head of the piston 2 is positioned between the two first communicating pipes 7; first check valves are arranged in the first communicating pipe 7 and the second communicating pipe 8.

When the piston 2 is pushed into the inner barrel 4, a first one-way valve in a first communicating pipe 7 close to the connecting plate 1 and a first one-way valve in a second communicating pipe 8 far away from the connecting plate 1 are opened, the first one-way valve in the second communicating pipe 8 close to the connecting plate 1 and the first one-way valve in the first communicating pipe 7 far away from the connecting plate 1 are closed, air between the outer barrel 5 and the inner barrel 4 is sucked into the inner barrel 4 by the piston 2, and meanwhile, original air in the inner barrel 4 is discharged out of the outer barrel through the second communicating pipe 8 far away from the connecting plate 1; when the piston 2 is pulled out towards the cylinder opening, a first one-way valve in a first communicating pipe 7 close to the connecting plate 1 and a first one-way valve in a second communicating pipe 8 far away from the connecting plate 1 are closed, a first one-way valve in the second communicating pipe 8 close to the connecting plate 1 and a first one-way valve in the first communicating pipe 7 far away from the connecting plate 1 are opened, air between the outer cylinder 5 and the inner cylinder 4 is sucked into the inner cylinder 4 by the piston 2, and meanwhile, original air in the inner cylinder 4 is discharged out of the outer cylinder through the second communicating pipe 8 far away from the connecting plate 1; in the push-and-pull process of the piston 2, a certain negative pressure is formed in the outer tube, so that the sputum is sucked through the sputum suction tube 3, the operation is smooth, and the sputum suction efficiency is improved.

Further, the first check valve comprises a limiting plate 9 fixedly connected with the inner wall of the communicating pipe, a through hole is formed in the middle of the limiting plate 9, a connecting column 10 is connected in the through hole in a sliding mode, a plugging plate 11 is fixedly connected to the top end of the connecting column 10, a mounting plate 12 is fixedly connected to the bottom end of the connecting column 10, a spring 13 is sleeved on the connecting column 10, and two ends of the spring 13 are respectively and fixedly connected with the mounting plate 12 and the limiting plate 9; the limiting plate 9 is provided with air holes, the bottom end of the plugging plate 11 is fixedly connected with plugging columns 14, and the plugging columns 14 correspond to the air holes.

Further, the driving part comprises a shell 15 fixedly connected with the connecting plate 1, the top end inside the shell 15 is fixedly connected with a sliding rod 16, the sliding rod 16 is slidably sleeved with a sliding sleeve 17, and the bottom end of the sliding sleeve 17 is fixedly connected with a plate frame 18; toothed plates 19 are fixedly connected to the top end and the bottom end of the inner side of the plate frame 18, a motor 20 is fixedly connected to the inner wall of the shell 15, a half gear 21 is fixedly connected to an output shaft of the motor 20, and the half gear 21 is meshed with the toothed plates 19; the push rod of the piston 2 penetrates through the connecting plate 1 to be fixedly connected with the plate frame 18, and the push rod of the piston 2 is in sliding connection with the connecting plate 1; an inlet and an outlet are formed in one side, far away from the connecting plate 1, of the shell 15, and the plate frame 18 is matched with the inlet and the outlet.

Utilize motor 20 to drive half gear 21 and rotate, half gear 21 when rotating, the periodic meshing with upper and lower pinion rack 19 respectively, and then make sheet frame 18 carry out reciprocating motion along slide bar 16 direction, and then drive piston 2 and push and pull, medical personnel only need a hand to keep inhaling the position of phlegm hose motionless when using and inhaling the phlegm device, can realize inhaling phlegm work, and the device operation is convenient.

Further, the sputum collecting part comprises a collecting box 22, a collecting port is formed in the bottom of the collecting box 22, the collecting box 22 is detachably connected with a sputum collecting bottle 23 through the collecting port, and the connecting pipe 6 and the sputum suction pipe 3 are communicated with the collecting box 22. In order to prevent the sputum in the sputum suction device from flowing back, an impeller 24 is rotatably connected in the connecting pipe 6, a worm 25 is fixedly connected in the middle of the impeller 24, a rotating shaft 27 is rotatably connected at the top of the collecting box 22, a worm wheel 26 is fixedly sleeved on the rotating shaft 27, and the worm wheel 26 is matched with the worm 25; the bottom of the rotating shaft 27 is fixedly connected with an auger blade 28, the auger blade 28 is positioned below the worm wheel 26, and the auger blade 28 extends into the sputum collection bottle 23. Sputum is sucked into the collection box 22 through the sputum suction pipe 3 and flows into the sputum collection bottle 23 through the collection port, and in the process of generating negative pressure by using the piston type negative pressure cylinder, air sucked in by the sputum suction pipe 3 can drive the impeller 24 to rotate when passing through the connecting pipe 6, the impeller 24 further drives the worm 25 to rotate, the worm 25 is further used for driving the worm wheel 26 to rotate, and then the auger blade 28 is driven to rotate, the sputum sucked into the collection box 22 and collected at the collection port can quickly enter the sputum collection bottle 23 by using the auger blade 28, the sputum is prevented from being sticky and blocking the collection port, and the effect of preventing the sputum from flowing back is not achieved; moreover, the auger blade 28 is used for actively conveying the sputum to the sputum collecting bottle 23, so that the sputum in the sputum collecting bottle 23 can be prevented from flowing out due to reasons such as dumping of the sputum collecting bottle 23.

Further, for better preventing that the sputum from flowing out by in the collection sputum bottle 23, at the collection mouth outside installation insert tube of collecting box 22 to make auger blade 28's outward flange and the interior pipe wall sliding connection of insert tube, and then realize even collection sputum bottle 23 emptys, the sputum also can't directly flow into to the collection box 22 through the collection mouth, further realizes preventing the effect that the sputum flows out by in the collection sputum bottle 23.

Furthermore, in order to prevent sputum from being sucked into the piston type negative pressure cylinder to block the one-way valve, a baffle plate 29 is arranged in the collection box 22, the top end of the baffle plate 29 is fixedly connected with the collection box 22, the baffle plate 29 is arranged corresponding to the sputum suction pipe 3, and one end of the worm 25, which is far away from the impeller 24, is rotatably connected with the baffle plate 29. Through the setting of baffle 29, can block the sputum on the one hand, prevent that the sputum from being inhaled in the piston negative pressure section of thick bamboo, on the other hand can carry out the drainage to the sputum of suction, makes the sputum enter into collection sputum flask 23 more easily.

Furthermore, in order to avoid the situation that thick sputum in the body of a patient is adhered to the inner wall of the sputum suction tube 3 to cause blockage of the sputum suction tube 3, a partition plate 30 is arranged in the sputum suction tube 3 along the length direction of the sputum suction tube 3, the partition plate 30 divides the sputum suction tube 3 into a sputum suction channel 31 and a ventilation channel 32, a second one-way valve 33 is installed at the inlet end of the sputum suction channel 31, a third one-way valve 34 is installed in the ventilation channel 32, and the third one-way valve 34 is located between the second one-way valve 33 and the sputum collection part; a vent hole is formed in the partition plate 30 and is positioned between the second check valve 33 and the third check valve 34; an air supply pipe 35 is communicated with the tail end of the second communicating pipe 8, and the tail end of the air supply pipe 35 is communicated with the ventilation channel 32; an electromagnetic directional valve 36 is installed on the air supply pipe 35 between the second communicating pipe 8 and the air vent passage 32, a pressure gauge 37 is installed on the connecting pipe 6, and the pressure gauge 37 is electrically connected with the electromagnetic directional valve 36.

Whether the sputum suction pipe 3 is blocked is judged according to the pressure value displayed by the pressure gauge 37, when the sputum suction pipe 3 is blocked, air exhausted by the piston type negative pressure cylinder enters the sputum suction passage 31 from the vent hole through the electromagnetic directional valve 36 and the vent passage 32, the third one-way valve 34 is opened at the moment, the second one-way valve 33 is closed, the sputum suction device stops sucking sputum, the air pressure in the sputum suction passage 31 is increased, sputum blocked by the sputum suction pipe 3 is discharged into the collection box 22 by the air pressure, when the sputum suction pipe 3 is recovered smoothly, the index of the pressure gauge 37 is recovered to be normal, meanwhile, the electromagnetic directional valve 36 is reversed, the air exhausted by the piston type negative pressure cylinder is discharged into the external environment through the electromagnetic directional valve 36, the second one-way valve 33 is opened, and the sputum suction work is recovered.

Further, the first check valve, the second check valve 33, and the third check valve 34 have the same structure.

When the sputum suction device provided by the invention is used, medical staff can realize the sputum suction work only by keeping the position of the sputum suction hose still with one hand, and the operation is convenient; the piston 2 of the piston type negative pressure cylinder can realize sputum suction in the pushing and pulling processes, the action is smooth, and the sputum suction efficiency is improved; moreover, the sputum backflow condition in the sputum suction device can be avoided by the arrangement of the sputum collecting part; and through will inhale phlegm pipe 3 and separate for the binary channels, can in time clear up the sputum that blocks up and inhale phlegm pipe 3, very big improvement inhale the effect and the progress of phlegm treatment to the patient.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.

Claims

1. The sputum suction device is characterized by comprising a piston type negative pressure cylinder, wherein the piston type negative pressure cylinder comprises a connecting plate (1), the negative pressure cylinder is fixedly installed on one side of the connecting plate (1), and a piston (2) is connected in the negative pressure cylinder in a sliding manner; one end of the negative pressure cylinder, which is far away from the connecting plate (1), is communicated with a sputum collection part, and a sputum suction pipe (3) is communicated with the sputum collection part; one side of the connecting plate (1) far away from the negative pressure cylinder is provided with a driving part, and the driving part is in transmission connection with the piston (2).

2. The sputum aspirator of claim 1, wherein: the negative pressure barrel comprises an inner barrel (4) and an outer barrel (5), the outer barrel (5) is sleeved on the outer side of the inner barrel (4), and a barrel opening of the inner barrel (4) and a barrel opening of the outer barrel (5) are fixedly connected with the connecting plate (1); one end of the outer barrel (5) far away from the connecting plate (1) is communicated with a connecting pipe (6), and the sputum collecting part is communicated with the outer barrel (5) through the connecting pipe (6); four communicating pipes are fixedly connected to the outer wall of the inner barrel (4), and the four communicating pipes are divided into two first communicating pipes (7) and two second communicating pipes (8); the two first communication pipes (7) are respectively positioned at two ends of the inner cylinder (4), and the inner cavity of the inner cylinder (4) is communicated with the inner cavity of the outer cylinder (5) through the first communication pipes (7); the two second communicating pipes (8) are respectively positioned at two ends of the inner barrel (4), the second communicating pipes (8) are arranged corresponding to the first communicating pipes (7), and the tail ends of the second communicating pipes (8) penetrate through the outer barrel (5) and extend out of the outer barrel (5); the piston (2) is arranged in the inner cylinder (4), the piston head of the piston (2) is connected with the cylinder wall of the inner cylinder (4) in a sliding manner, and the piston head of the piston (2) is positioned between the two first communication pipes (7); first one-way valves are arranged in the first communicating pipe (7) and the second communicating pipe (8).

3. The sputum aspirator of claim 2, wherein: the first one-way valve comprises a limiting plate (9) fixedly connected with the inner wall of the communicating pipe, a through hole is formed in the middle of the limiting plate (9), a connecting column (10) is connected in the through hole in a sliding mode, a plugging plate (11) is fixedly connected to the top end of the connecting column (10), a mounting plate (12) is fixedly connected to the bottom end of the connecting column (10), a spring (13) is sleeved on the connecting column (10), and two ends of the spring (13) are respectively and fixedly connected with the mounting plate (12) and the limiting plate (9); the limiting plate (9) is provided with air holes, the bottom end of the plugging plate (11) is fixedly connected with plugging columns (14), and the plugging columns (14) correspond to the air holes.

4. The sputum aspirator of claim 1, wherein: the driving part comprises a shell (15) fixedly connected with the connecting plate (1), the top end inside the shell (15) is fixedly connected with a sliding rod (16), the sliding rod (16) is sleeved with a sliding sleeve (17) in a sliding mode, and the bottom end of the sliding sleeve (17) is fixedly connected with a plate frame (18); toothed plates (19) are fixedly connected to the top end and the bottom end of the inner side of the plate frame (18), a motor (20) is fixedly connected to the inner wall of the shell (15), a half gear (21) is fixedly connected to an output shaft of the motor (20), and the half gear (21) is meshed with the toothed plates (19); a push rod of the piston (2) penetrates through the connecting plate (1) to be fixedly connected with the plate frame (18), and the push rod of the piston (2) is in sliding connection with the connecting plate (1); an inlet and an outlet are formed in one side, far away from the connecting plate (1), of the shell (15), and the plate frame (18) is matched with the inlet and the outlet.

5. The sputum aspirator of claim 2, wherein: the sputum collecting part comprises a collecting box (22), a collecting port is formed in the bottom of the collecting box (22), the collecting box (22) is detachably connected with a sputum collecting bottle (23) through the collecting port, and the connecting pipe (6) and the sputum suction pipe (3) are communicated with the collecting box (22).

6. The sputum aspirator of claim 5, wherein: an impeller (24) is rotatably connected in the connecting pipe (6), a worm (25) is fixedly connected in the middle of the impeller (24), a rotating shaft (27) is rotatably connected at the top of the collecting box (22), a worm wheel (26) is fixedly sleeved on the rotating shaft (27), and the worm wheel (26) is matched with the worm (25); pivot (27) bottom fixedly connected with auger blade (28), auger blade (28) are located worm wheel (26) below, just auger blade (28) stretch into in album sputum flask (23).

7. The sputum aspirator of claim 6, wherein: a baffle (29) is arranged in the collection box (22), the top end of the baffle (29) is fixedly connected with the collection box (22), the baffle (29) is arranged corresponding to the sputum suction pipe (3), and one end, far away from the impeller (24), of the worm (25) is rotatably connected with the baffle (29).

8. The sputum aspirator of claim 2, wherein: a partition plate (30) is arranged in the sputum suction pipe (3) along the length direction of the sputum suction pipe (3), the partition plate (30) divides the sputum suction pipe (3) into a sputum suction channel (31) and a ventilation channel (32), a second one-way valve (33) is installed at the inlet end of the sputum suction channel (31), a third one-way valve (34) is installed in the ventilation channel (32), and the third one-way valve (34) is located between the second one-way valve (33) and the sputum collection part; a vent hole is formed in the partition plate (30), and the vent hole is positioned between the second one-way valve (33) and the third one-way valve (34); an air supply pipe (35) is communicated with the tail end of the second communicating pipe (8), and the tail end of the air supply pipe (35) is communicated with the ventilation channel (32); an electromagnetic directional valve (36) is mounted on the air supply pipe (35) between the second communicating pipe (8) and the ventilation channel (32).

9. The sputum aspirator of claim 8, wherein: install manometer (37) on connecting pipe (6), manometer (37) with solenoid directional valve (36) electric connection.

10. The sputum aspirator of claim 8, wherein: the first check valve, the second check valve (33) and the third check valve (34) are identical in structure.