CN212730536U - Guide column type sealing structure of sputum suction device and anti-splashing sputum suction device - Google Patents

Abstract

The utility model discloses a inhale phlegm device guide post type seal structure, including negative pressure control handle, negative pressure control handle is connected with inhales the phlegm pipe, inhales the outside parcel of phlegm pipe and has the sheath, and handle sheath subassembly and negative pressure control handle sealing connection are passed through to the one end of sheath, and handle sheath subassembly includes that sheath base, sheath are sealed to fill up and the sheath retainer plate. The utility model discloses simultaneously disclose a prevent splash and inhale phlegm device, including the cross-pipe body and as above a inhale phlegm device guide post type seal structure, cross-pipe body kneck is connected with trachea cannula joint, breathing circuit joint respectively, washs the joint and inhales the phlegm pipe and connects, inhales the both ends of phlegm pipe and is connected with inhaling phlegm pipe joint and negative pressure control assembly respectively, breathes the circuit joint and still is equipped with the switch interface on wasing the cross-pipe body between the joint. The utility model discloses can solve the sealed problem of current phlegm suction device operation end and the traditional phlegm suction device inconvenient operation, can't prevent the problem that liquid splashes.

Description

Guide column type sealing structure of sputum suction device and anti-splashing sputum suction device

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a inhale phlegm device guide pillar formula seal structure and prevent splash and inhale phlegm device.

Background

Sputum suction is a process with high repeatability and relatively complex operation, and a closed sputum suction tube is frequently used in respiratory system diseases, general anesthesia operations and emergency treatment and is used for carrying out sputum suction operation on patients with severe illness by matching with a breathing machine. However, in the sputum aspiration process, due to the difference of the state of illness and constitution of patients, the amount and viscosity of the sputum produced are different, and in order to ensure the smooth operation of sputum aspiration, the sputum aspiration tube needs to be injected or flushed from time to time; in the process of flushing, saline or other cleaning liquid flows back easily to be sucked into the trachea to enter the airway to influence the breathing of a patient, and even cause lung infection seriously; simultaneously to the patient that the sputum volume is more, because the stickness of sputum itself, when washing the suction catheter, be difficult for washing down the sputum, need wash for a long time, both caused the waste of resource, had increaseed medical personnel's work load again.

In addition, the existing sputum suction device cannot ensure the sealing of the path of the sputum suction tube, the sputum suction tube needs to be taken out after the sputum suction work is finished, sputum and secretion sucked out by the sputum suction tube in the process are easy to splash and expose in the air, and the infection risk is increased for medical staff.

Disclosure of Invention

An object of the utility model is to provide an inhale phlegm device guide pillar formula seal structure for solve the sealed problem of current phlegm device operation end of inhaling.

An object of the utility model is to provide a prevent that splash inhales phlegm device for solve the tradition and inhale the phlegm device inconvenient operation, can't prevent the problem that liquid splashes.

In order to solve the problem, the utility model adopts the following technical scheme:

a guide post type sealing structure of a sputum suction device comprises a negative pressure control assembly, the negative pressure control assembly comprises a negative pressure control handle, the negative pressure control handle is connected with a sputum suction pipe, inhale phlegm outside of tubes portion parcel has the sheath, the one end of sheath is passed through handle sheath subassembly and negative pressure control handle sealing connection, handle sheath subassembly includes the sheath base, the sealed pad of sheath and sheath retainer plate, the sheath base cover is established on negative pressure control handle, the one end that the sheath base is close to inhales phlegm pipe is through first clamp fixed connection with the one end of sheath, the one end that the phlegm pipe was kept away from to the sheath base is passed through the sealed pad of sheath and negative pressure control handle interference fit, the tip of sheath base is equipped with the guide pillar, the sealed pad of sheath and sheath retainer plate are pegged graft on the guide pillar through the guiding hole respectively, guiding hole and guide pillar interference fit, the sheath retainer plate is located the sealed one side of inhaling phlegm pipe of.

Optionally, the sheath sealing gasket is of a concave structure, the sheath sealing gasket comprises a concave part and a connecting part, the concave part is in interference fit with the negative pressure control handle, and the connecting part is inserted on the guide pillar of the sheath base.

Optionally, a handheld part is arranged on the periphery of one end of the sheath base, which is far away from the sputum suction tube.

The utility model provides a prevent splash and inhale phlegm device includes cross-pipe body and as above inhale phlegm device guide post formula seal structure, cross-pipe body kneck is connected with trachea cannula joint, breathing circuit joint, washing joint and inhale the phlegm pipe and connect respectively, inhale the both ends of phlegm pipe respectively with inhale the phlegm pipe and connect with negative pressure control assembly, breathing circuit connects with still be equipped with the switch interface on the cross-pipe body between the washing joint, be provided with in the switch interface and be used for controlling trachea cannula connects with inhale the rotatory switch that the phlegm pipe connects and cut off or communicate.

Optionally, the rotary switch comprises a cock and a knob, the cock is inserted into the switch interface and is rotatably connected with the switch interface, a through hole is radially arranged on the side wall of the cock in a penetrating manner, the sputum suction tube can penetrate through the through hole, and the knob is installed at the end of the cock far away from the switch interface.

Optionally, the end of the cock inserted into the switch interface is provided with a limit groove, the inner wall of the switch interface is provided with a protrusion matched with the limit groove, and the limit groove is arc-shaped.

Optionally, the plug is further sleeved with a locking ring, the locking ring is bonded to an inner wall of the switch interface, a clamping groove is further formed in a side wall of the plug between the locking ring and the through hole, and an annular sealing ring in sealing fit with the locking ring is mounted in the clamping groove.

Optionally, when the rotary switch is in a closed state, a square sealing gasket is further disposed on a side wall of the cock corresponding to the four-way pipe body, and an area of the square sealing gasket is larger than a sectional area of the four-way pipe body.

Optionally, the sputum suction pipe joint is further provided with an annular filtrate gasket, the annular filtrate gasket is embedded in an inner cavity of the sputum suction pipe joint, one side of the annular filtrate gasket is further provided with a fixing base with a round hole in the middle, the fixing base is connected to the sputum suction pipe joint, the round hole is matched with the size of the sputum suction pipe, one side of the fixing base is further provided with an annular sealing gasket, and the other end of the sheath is fixedly connected to the fixing base through a second clamp.

Optionally, the negative pressure control assembly is a bronchofiberscope, and the bronchofiberscope comprises a negative pressure control handle and a display.

Adopt above-mentioned technical scheme, the utility model has the advantages of it is following:

1. in the sealing structure of the sputum suction device, one end of a sheath is fixed on a sheath base by a first clamp, a sheath sealing gasket and a sheath fixing ring are inserted on the sheath base, meanwhile, the sheath sealing gasket is in interference fit with a negative pressure control handle, the sealing of the operation end of a negative pressure control assembly is realized, and the sealing between the sheath base and the negative pressure control assembly can be ensured by the mechanical matching mode of a guide pillar and a guide hole.

2. The four-way pipe body of the utility model is provided with the rotary switch for controlling the partition or communication of the tracheal intubation joint and the sputum suction pipe joint, and when in use, the rotary switch is kept in a normally closed state under the condition of no operation, thereby having good sealing performance; when needs inhale the phlegm pipe operation, operating personnel only need with rotary switch anticlockwise rotation 90 degrees, radially run through on the cock lateral wall and be provided with the through-hole, it is switched on to inhale the phlegm passageway, it passes the through-hole and inhales the phlegm operation to inhale the phlegm pipe, wait to inhale the phlegm work and accomplish the back, operating personnel will inhale the phlegm pipe pull-back, press the clockwise rotation 90 degrees with rotary switch, can realize resetting sealedly, thereby accomplish switching operation once, pull down to the assigned position after inhaling the phlegm pipe, open and wash the joint, wash inhaling the phlegm pipe, the design is simple structure not only, it is convenient fast with the switching of the flash state to inhale phlegm pipe normal close, and can effectively prevent the emergence of suck-back phenomenon, it is simple and convenient high-efficient to inhale phlegm and follow-up flushing operation process, it inhales phlegm and its relevant clinical medical treatment operating efficiency to have improved.

3. In the downward pulling process of the sputum suction tube, the annular filtrate gasket arranged at the joint of the sputum suction tube can scrape the sputum on the outer wall of the sputum suction tube, so that the sputum suction tube is more convenient and thorough to clean, the workload of medical operators is further reduced, and the efficiency of sputum suction and subsequent flushing is improved.

4. The sheath can seal and isolate the sputum suction tube from the environment, and avoid the sputum and secretion of the patient infected by the sputum suction tube from polluting the indoor environment or infecting medical care personnel. The sealing structures at the two ends of the sheath can ensure the sealing between the bronchofiberscope and the four-way pipe, so that a closed space is formed and the operation is safe.

5. Bronchofiberscope is selected for use to the negative pressure control subassembly, is different from current phlegm suction device, and it can be directly at the lung phlegm suction, and bronchofiberscope connects patient end trachea cannula joint and inhales the phlegm, when guaranteeing visual degree of depth, pins bronchofiberscope with rotary switch and makes it fixed, connects the apparatus of oxygen suppliment through breathing return circuit and to patient's oxygen suppliment. The artificial airway does not need to be separated from the breathing machine in the process of sucking the sputum each time, so that the mechanical ventilation is interrupted to ensure that the airway of the patient is communicated with the atmosphere, the continuous oxygen supply can be realized while the sputum is sucked, and the hypoxia of the patient is avoided.

Drawings

Fig. 1 is a schematic structural view of the splash-proof sputum aspirator of the utility model.

Fig. 2 is a partially enlarged schematic view at a in fig. 1.

Fig. 3 is a partially enlarged schematic view at B in fig. 1.

Fig. 4 is the assembly structure diagram of the middle four-way pipe body and the rotary switch of the present invention.

Fig. 5 is a schematic view of the cross-sectional structure of the middle cross-pipe body and the rotary switch of the present invention.

Fig. 6 is a schematic view of an assembly structure of the rotary switch of the present invention.

Fig. 7 is a schematic view of a knob structure of the middle rotary switch of the present invention.

In the figure, 1 is a four-way pipe body, 2 is a sputum suction pipe, 3 is a tracheal intubation joint, 4 is a breathing circuit joint, 5 is a cleaning joint, 6 is a sputum suction pipe joint, 7 is a sheath, 8 is a switch interface, 9 is a rotary switch, 10 is a sealing ring, 11 is a cock, 12 is a knob, 13 is a through hole, 14 is a limiting groove, 15 is a protrusion, 16 is a locking ring, 17 is a clamping groove, 18 is an annular sealing ring, 19 is a slotted hole, 20 is a column, 21 is a square sealing gasket, 22 is a first triangular mark, 23 is a second triangular mark, 24 is a positioning block, 25 is a positioning groove, 26 is a bump, 27 is an indicating mark, 28 is a filtrate gasket, 29 is a round hole, 30 is a fixing base, 31 is a sealing gasket, 32 is a second clamp, 33 is a negative pressure control handle, 34 is a sheath base, 35 is a sheath sealing gasket, 36 is a sheath fixing ring, 37 is a first clamp, 38 is a guide, 39 is a hand-held portion, 40 is a display.

Detailed Description

In order to make the technical purpose, technical solutions and advantageous effects of the present invention clearer, the technical solutions of the present invention are further described below with reference to fig. 1 to 6 and specific embodiments.

An embodiment of a guide column type sealing structure of a sputum suction device comprises the following steps:

a guide post type sealing structure of a sputum suction device comprises a negative pressure control assembly, wherein the negative pressure control assembly comprises a negative pressure control handle 33, the negative pressure control handle 33 is connected with a sputum suction pipe 2, the exterior of the sputum suction pipe 2 is wrapped with a sheath 7, the sheath 7 is made of transparent materials, one end of the sheath 7 is in sealing connection with the negative pressure control handle 33 through a handle sheath assembly, the handle sheath assembly comprises a sheath base 34, a sheath sealing gasket 35 and a sheath fixing ring 36, the sheath base 34 is sleeved on the negative pressure control handle 33, one end, close to the sputum suction pipe, of the sheath base 34 is fixedly connected with one end of the sheath 7 through a first clamp 37, one end, far away from the sputum suction pipe, of the sheath base 34 is in interference fit with the negative pressure control handle 33 through the sheath sealing gasket 35, the sheath sealing gasket is made of soft elastic materials such as silica gel, rubber and the, the sheath sealing gasket 35 and the sheath fixing ring 36 are respectively inserted on the guide post 38 through the guide holes, the guide holes are in interference fit with the guide post 38, and the sheath fixing ring 36 is located on one side of the sheath sealing gasket 35 far away from the sputum suction tube.

Further, as the utility model discloses one of them embodiment, the sealed pad 35 of sheath is interior concave type structure, and the sealed pad 35 of sheath includes interior concave part and connecting portion, interior concave part with negative pressure control handle interference fit, connecting portion peg graft on the guide pillar 38 of sheath base. The sheath sealing gasket structure of the concave structure is more stable and has better sealing property.

Further, as one embodiment of the present invention, a handheld portion 39 is disposed at the periphery of one end of the sheath base 34 away from the sputum aspirating tube. The sheath base 34 can be secured to the negative pressure control handle 33 by a hand grip 39.

During sealing connection, the one end of sheath 7 is connected to the one end that is close to the sputum suction tube of sheath base 34 through first clamp fixed connection, and peg graft sheath sealing gasket 35 and sheath retainer plate 36 on guide pillar 38 through the guiding hole respectively, overlap sheath base 34 to negative pressure control handle, make the sealed gasket 35 of sheath and negative pressure control handle interference fit, from this, can keep apart the one end that sheath 7 is close to negative pressure control handle 33 with the external world, guarantee the leakproofness of negative pressure control assembly operation end.

An embodiment of a splash-proof sputum aspirator comprises:

the utility model provides a prevent splash and inhale phlegm device includes cross-tube body 1 and as above an inhale phlegm device guide post formula seal structure, cross-tube body 1 kneck be connected with trachea cannula joint 3 respectively, breathe return circuit joint 4, wash joint 5 and inhale phlegm pipe joint 6, inhale the both ends of phlegm pipe 2 and inhale phlegm pipe joint 6 and negative pressure control assembly and be connected respectively, breathe return circuit joint 4 with wash still to be equipped with switch interface 8 on the cross-tube body 1 between the joint 5, be provided with in the switch interface 8 and be used for control trachea cannula joint 3 with inhale the rotary switch 9 that phlegm pipe joint 6 cuts off or communicate.

Further, the utility model discloses in one of them embodiment, trachea cannula connects 3, breathing circuit connects 4 and inhales phlegm pipe joint 6 and is the setting of T style of calligraphy structure, and it is more convenient to operate, trachea cannula connects 3 and breathing circuit connect 4 with the junction of cross body 1 still is embedded respectively to have a sealing washer 10 to more be favorable to improving its sealing performance, sealing washer 10 is the silicon rubber material, it sets up perpendicularly to wash connects 5 on the cross body 1, it is connected with the flushing assembly to wash connects 5.

Further, in one embodiment of the present invention, the rotary switch 9 includes a cock 11 and a knob 12, the cock 11 is a cylinder structure with one end open and the other end closed, the knob 12 is installed at the end of the open end of the cock 11, the closed end of the cock 11 is inserted into the switch interface 8 and is rotatably connected to the switch interface 8, a through hole 13 is radially arranged on the side wall of the cock 11 in a penetrating manner, and the size of the through hole 13 matches with the sputum suction tube 2; the end part of the closed end of the cock 11 is provided with a limit groove 14, the inner wall of the switch interface 8 is correspondingly provided with a bulge 15 matched with the limit groove 14, is used for rotationally positioning the rotary switch 9, the rotary switch 9 is kept in a normally closed state under the normal non-operation state, the sealing performance is good, when the sputum suction operation is needed, the cock 11 is rotated to enable the through hole 13 to be coaxial with the sputum suction pipe 2, the rotary switch 9 is opened, the sputum suction tube 2 passes through the through hole 13 to perform sputum suction operation, after the sputum suction operation is finished, the operator pulls back the sputum suction tube 2, rotates the cock 11 again to realize the reset closing of the rotary switch 9, then opens the cleaning joint, the sputum suction tube 2 is cleaned, so that the phenomenon of back suction is effectively prevented, and the sputum suction tube is safer and more reliable.

Furthermore, in one embodiment of the present invention, the limiting groove 14 is arc-shaped, and the arc length of the limiting groove 14 is one fourth of the circumference of the cock 11, so that the cock 11 can be rapidly turned 90 ° clockwise or counterclockwise for one-time opening and closing operation of the rotary switch 8, which is more simple and convenient to operate.

Further, the utility model discloses in one of them embodiment, it is equipped with locking ring 16 still to overlap on the cock 11, locking ring 16 bonds switch interface 8 inner wall, locking ring 16 with still be equipped with draw-in groove 17 on the cock 11 lateral wall between the through-hole 13, install in the draw-in groove 17 with locking ring 16 seals complex ring 18, and the design makes like this cock 11 is in rotation in the switch interface 8 is more stable, does not influence its rotation promptly, has effectively prevented again that it from inhaling the phlegm in-process in the clinic and following drop in the switch interface 8, and is safe and reliable more, and ring 18 can effectively prevent that washing liquid from outflowing, avoids doctorsing and nurses and leads to the fact unnecessary injury and influence to personnel.

Further, in one of them embodiment of the utility model, under the rotary switch 9 closure state, four-way pipe body 1 corresponds still be provided with slotted hole 19 on the 11 lateral walls of cock, be provided with square sealed pad 21 in the slotted hole 19, the area of square sealed pad 21 is greater than four-way pipe body 1's sectional area to form interference fit, play sealed effect, more can guarantee to inhale phlegm work and accomplish the back, it is closed rotary switch 9, it is right when inhaling phlegm pipe 2 and wasing, the flush fluid can not flow backwards and is inhaled to the intratracheal entering air flue and influence patient and breathe, square sealed pad 21 adopts the silicon rubber material.

Furthermore, in one embodiment of the present invention, a column 20 is further disposed in the slot 19, a clamping groove matched with the column 20 is disposed on the bottom surface of the square sealing gasket 21, the square sealing gasket 21 is fastened on the column 20, so that the rotary switch 9 is rotated, the column 20 can provide a supporting force for the square sealing gasket 21, and the square sealing gasket 21 is not deformed when the rotation is ensured.

Further, the utility model discloses in one of them embodiment, knob 12 with cock 11 adopts sticky mode to connect, be provided with two sets of first triangle signs 22 along radial symmetry on the circumference of knob 12 lateral wall, be provided with on switch interface 8's the lateral wall with two sets of second triangle signs 23 that first triangle sign 22 corresponds each other, knob 12's inside wall is provided with locating piece 24, the inside wall of cock 11 open end is provided with rather than complex constant head tank 25, is in under the open mode like this when rotary switch, first triangle sign 22 with second triangle sign 23 is corresponding, more does benefit to medical personnel and judges rotary switch 9's on-off state.

Further, the utility model discloses in one of them embodiment, radially still the symmetry is provided with two sets of lugs 26 on the knob 12 lateral wall circumference, the application of force when being convenient for rotate, two sets of lugs 26 the line with two sets of first triangle sign 22's line is perpendicular, the surface of knob 12 can also be printed and have indicator 27 to make things convenient for medical personnel's operation more.

Further, the utility model discloses in one of them embodiment, sputum aspirator pipe joint 6 department still is provided with annular filtrating gasket 28, annular filtrating gasket 28 embedded in the inner chamber of sputum aspirator pipe joint 6 department, the size of annular filtrating gasket 28 slightly is less than inhale the size of phlegm pipe 2, annular filtrating gasket 28 be the silicon rubber material, because the elasticity of silica gel self, design like this neither influences phlegm pipe 2 and passes, makes things convenient for again in the daily sputum aspiration operation to glue thick or the patient that the sputum volume is big uses, inhales phlegm pipe 2 and pull down the in-process, annular filtrating gasket 28 can be scraped the sputum on the outer wall of sputum aspirator pipe 2, not only makes the washing of sputum convenient and fast more, and the effect is better, has shortened the scavenging period moreover greatly, has reduced medical personnel's work load.

Further, in one embodiment of the present invention, the annular filtrate gasket 28 one side is provided with the fixing base 30 having the round hole 29 in the middle, the fixing base 30 is connected to the sputum suction pipe joint 6, the round hole 29 matches with the size of the sputum suction pipe 2, so that the sputum suction pipe 2 can pass through smoothly, the fixing base 30 one side is further provided with the annular sealing gasket 31, and the other end of the sheath 7 is fixedly connected to the fixing base 30 through the second clamp 32.

Further, in the above embodiments, the negative pressure control component is a bronchofiberscope, and the bronchofiberscope includes the negative pressure control handle 33 and the display 40.

The utility model discloses it has following advantage to set up the four-way pipe: the bronchofiberscope is connected with the trachea cannula joint at the patient end to suck phlegm, and when visual depth is ensured, the bronchofiberscope is locked by a rotary switch to be fixed, and is connected with an oxygen supply device through a breathing loop joint to supply oxygen to the patient. The artificial airway is not required to be separated from the breathing machine in the process of sucking the sputum each time, mechanical ventilation is interrupted, the airway of a patient is communicated with the atmosphere, continuous oxygen supply can be realized while the sputum is sucked, and the hypoxia of the patient is avoided.

The sheath 7 can carry out airtight isolation with bronchofiberscope and environment, and simultaneously, the accessible washs the connector and connects washing component (if the syringe that contains the washing liquid) and wash the bronchofiberscope, avoids the indoor environment of bronchofiberscope contaminated patient's sputum and secretion to pollute or cause the infection to medical personnel. Meanwhile, after the sputum suction work is finished, sputum and secretion sucked out by the sputum suction pipe can be prevented from splashing and being exposed in the air in the process of taking out the sputum suction pipe, and the infection risk of medical personnel is reduced.

The sealing structures at the two ends of the sheath 7 can ensure the sealing between the bronchofiberscope and the four-way pipe, so that a closed space is formed and the operation is safe.

The above embodiments are not intended to limit the shape, material, structure, etc. of the present invention in any form, and all of the technical matters of the present invention belong to the protection scope of the present invention to any simple modification, equivalent change and modification of the above embodiments.

Claims (10)

1. The utility model provides a inhale phlegm device guide pillar formula seal structure, includes negative pressure control assembly, negative pressure control assembly includes negative pressure control handle, and negative pressure control handle is connected with inhales phlegm pipe, its characterized in that: inhale phlegm outside of tubes portion parcel has the sheath, the one end of sheath is passed through handle sheath subassembly and negative pressure control handle sealing connection, handle sheath subassembly includes the sheath base, the sealed pad of sheath and sheath retainer plate, the sheath base cover is established on negative pressure control handle, the one end that the sheath base is close to inhales phlegm pipe is through first clamp fixed connection with the one end of sheath, the one end that the phlegm pipe was kept away from to the sheath base is passed through the sealed pad of sheath and negative pressure control handle interference fit, the tip of sheath base is equipped with the guide pillar, the sealed pad of sheath and sheath retainer plate are pegged graft on the guide pillar through the guiding hole respectively, guiding hole and guide pillar interference fit, the sheath retainer plate is located the sealed one side of inhaling phlegm pipe of.

2. The column type sealing structure of sputum aspirator according to claim 1, wherein: the sheath is sealed to seal the pad and is interior concave type structure, and the sheath is sealed to seal the pad and is included interior concave part and connecting portion, and interior concave part and negative pressure control handle interference fit, connecting portion peg graft on the guide pillar of sheath base.

3. The column type sealing structure of the sputum aspirator guide of claim 2, wherein: the periphery of one end of the sheath base, which is far away from the sputum suction tube, is provided with a handheld part.

4. The utility model provides a prevent splash and inhale phlegm device which characterized in that: the sputum aspirator guide post type sealing structure comprises a four-way pipe body and the sputum aspirator guide post type sealing structure according to any one of claims 1 to 3, wherein a trachea cannula joint, a breathing circuit joint, a cleaning joint and a sputum aspirator joint are respectively connected to the interface of the four-way pipe body, two ends of the sputum aspirator are respectively connected with the sputum aspirator joint and the negative pressure control assembly, a switch interface is further arranged on the four-way pipe body between the breathing circuit joint and the cleaning joint, and a rotary switch used for controlling the partition or communication between the trachea cannula joint and the sputum aspirator joint is arranged in the switch interface.

5. The anti-splashing sputum aspirator of claim 4, wherein: the rotary switch comprises a cock and a knob, the cock is inserted into the switch interface and is rotatably connected with the switch interface, a through hole is radially arranged on the side wall of the cock in a penetrating manner, the sputum suction tube can penetrate through the through hole, and the knob is arranged at the end part of the cock far away from the switch interface.

6. The anti-splashing sputum aspirator of claim 5, wherein: the end part of the cock, which is inserted into the switch interface, is provided with a limit groove, the inner wall of the switch interface is provided with a bulge matched with the limit groove, and the limit groove is arc-shaped.

7. The anti-splashing sputum aspirator of claim 6, wherein: the plug is also sleeved with a locking ring, the locking ring is bonded on the inner wall of the switch interface, a clamping groove is also arranged on the side wall of the plug between the locking ring and the through hole, and an annular sealing ring which is in sealing fit with the locking ring is arranged in the clamping groove.

8. The anti-splashing sputum aspirator of claim 7, wherein: and under the closed state of the rotary switch, the side wall of the cock corresponding to the four-way pipe body is also provided with a square sealing gasket, and the area of the square sealing gasket is larger than the sectional area of the four-way pipe body.

9. The anti-splashing sputum aspirator of claim 4, wherein: the sputum suction pipe joint is also provided with an annular filtrate gasket, the annular filtrate gasket is embedded in an inner cavity of the sputum suction pipe joint, one side of the annular filtrate gasket is also provided with a fixed base with a round hole in the middle, the fixed base is connected to the sputum suction pipe joint, the round hole is matched with the size of the sputum suction pipe, one side of the fixed base is also provided with an annular sealing gasket, and the other end of the sheath is fixedly connected to the fixed base through a second clamp.

10. The anti-splashing sputum aspirator of claim 4, wherein: the negative pressure control assembly is a bronchofiberscope which comprises a negative pressure control handle and a display.

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