CN113855294B

CN113855294B - Saliva pipe and inhale saliva device are inhaled in extension

Info

Publication number: CN113855294B
Application number: CN202111303414.8A
Authority: CN
Inventors: 周彦玢
Original assignee: Second Xiangya Hospital of Central South University
Current assignee: Second Xiangya Hospital of Central South University
Priority date: 2021-11-05
Filing date: 2021-11-05
Publication date: 2022-12-20
Anticipated expiration: 2041-11-05
Also published as: CN113855294A

Abstract

The invention discloses an extended saliva suction tube which comprises a suction tube body and an extended tube, wherein one end of the suction tube body is communicated with the extended tube through a connecting piece, the connecting piece comprises a cylindrical tube and a nut, arc-shaped threaded pieces are fixedly connected to the outer walls of two ends of the cylindrical tube, three arc-shaped threaded pieces positioned at the same end of the cylindrical tube are arranged at equal angles, the nut is in threaded connection with the arc-shaped threaded pieces, one end of the extended tube is fixedly inserted and connected to one end of the cylindrical tube, and one end of the suction tube body is fixedly inserted and connected to the other end of the cylindrical tube.

Description

Saliva pipe and inhale saliva device are inhaled in extension

Technical Field

The invention relates to the technical field of medical instruments, in particular to a device for prolonging a saliva suction pipe and sucking saliva.

Background

With the continuous development of intelligent medical instruments, people increasingly use a new generation of convenient medical instruments in life. At present, the saliva suction pipeline of the common oral chair is short and heavy, so the saliva suction pipeline is hung at the mouth corner of a patient during treatment, the dragging feeling is obvious, and if the treatment is carried out according to the condition, the patient is uncomfortable due to long treatment time, and the treatment experience of the patient is reduced. When the saliva suction pipe needs to be replaced from the left side of the patient to the right side of the patient, the length of the saliva suction pipe is not long enough, so that the operation of a doctor is not facilitated in the actual operation, and inconvenience is caused.

Meanwhile, the existing saliva suction equipment does not have the functions of filtering off peculiar smell and temporarily flushing; the first problem is that since saliva contains various enzymes, oral cavity bleeding can be sucked together with the saliva during treatment, so that peculiar smell can be generated in the collecting bottle after a long time, and the peculiar smell in the collecting bottle can be sucked and discharged into the surrounding air by the suction pump, thereby polluting the surrounding air;

problem two, when the patient is more, saliva in the collecting bottle just need pour out, clear up once for a period of time, and this process is not only extravagant a large amount of time, influences work efficiency, and in a period of time moreover, saliva and blood can the adhesion on the collecting bottle inner wall, subsequent cleaning work of being not convenient for.

Disclosure of Invention

The technical task of the invention is to provide a saliva suction pipe and a saliva suction device aiming at the defects, so as to solve the problems.

The technical scheme of the invention is realized as follows:

the invention provides an extension saliva suction tube, which comprises a suction tube body and an extension tube, wherein one end of the suction tube body is communicated with the extension tube through a connecting piece.

Preferably, the straw body is a disposable saliva straw.

Preferably, the extension tube is a transparent silica gel hose.

Preferably, the side surface of the straw body is provided with a liquid sucking hole, and the straw body is in a U-shaped arrangement.

Preferably, the extension tube has a length of one meter, an inner diameter of five millimeters, and an outer diameter of seven millimeters.

Preferably, the connecting piece comprises a cylindrical pipe and a nut, arc thread pieces are fixedly connected to the outer walls of the two ends of the cylindrical pipe, the number of the arc thread pieces at the same end of the cylindrical pipe is three, the number of the arc thread pieces is equal to the number of the arc thread pieces, the nut is in threaded connection with the arc thread pieces, one end of the extension pipe is fixedly connected with one end of the cylindrical pipe in an inserted mode, and one end of the suction pipe body is fixedly connected with the other end of the cylindrical pipe in an inserted mode.

Preferably, both ends of the cylindrical tube are arranged in a conical shape.

The invention also provides a saliva suction device, which comprises the prolonged saliva suction pipe matched with the saliva suction device, a mounting seat and a collecting bottle, wherein the collecting bottle is arranged on the mounting seat through a lifting assembly, and four corners of the mounting seat are provided with mounting holes;

the lifting assembly comprises a sleeve, the sleeve is fixedly connected to the upper surface of the mounting seat, an inserted rod is movably inserted in the sleeve, a handle screw for tightening and loosening the inserted rod is arranged at the upper end of the sleeve, a mounting block is fixedly connected to the top of the inserted rod, a cylindrical connecting cylinder is fixedly connected to the mounting block, the lower end of the cylindrical connecting cylinder fixedly penetrates through the top of the mounting block, external threads are formed in the outer wall of the lower end of the cylindrical connecting cylinder, internal threads are formed in the inner wall of the upper end of the collecting bottle, and the collecting bottle is installed at the lower end of the cylindrical connecting cylinder in a threaded manner;

the vacuum pump is characterized in that a shell is fixedly connected to the mounting seat, a vacuum pump and a cleaning pump are fixedly mounted inside the shell respectively, an air inlet of the vacuum pump is communicated with a first connecting pipe, one end of the first connecting pipe fixedly penetrates through the shell, a placing groove is formed in one end, penetrating out of the shell, of the first connecting pipe, a filter element is hermetically sleeved inside the placing groove, a rotary cover is connected to the lower end of a negative pressure hose, threads of the rotary cover are fixedly connected to one end of the first connecting pipe, one end of the negative pressure hose is communicated with the inside of the upper end of the cylindrical connecting cylinder, the upper end of the collecting bottle is communicated with a connecting nozzle, the connecting nozzle is communicated with one end of a third connecting pipe, a valve is arranged at one end, far away from the connecting nozzle, of the third connecting pipe, the other end of the valve is communicated with one end of an extension pipe, a groove is formed in the outer wall of one side, far away from the first connecting pipe, of the shell, a choke plate is fixedly mounted inside the groove, an air outlet of the vacuum pump is communicated with an air outlet pipe, one end of the air outlet pipe is communicated with the inside of the groove, and a plurality of inclined holes which are formed in a downward inclination;

a water outlet of the cleaning pump is communicated with a second connecting pipe, a water valve is arranged on the second connecting pipe, one end of the second connecting pipe penetrates through one side of the shell, one end, located on the outer side of the shell, of the second connecting pipe is communicated with a water outlet hose, the upper end of the water outlet hose is hermetically inserted into the cylindrical connecting cylinder, the end, extending into the cylindrical connecting cylinder, of the water outlet hose is communicated with a hard pipe, the lower end of the hard pipe is fixedly connected with a spray head, the spray head extends into the collecting bottle, a water inlet of the cleaning pump is communicated with a water inlet pipe, and one end of the water inlet pipe fixedly penetrates through the shell and is communicated with an external cleaning liquid tank;

the lower end of the collecting bottle is communicated with a liquid discharge pipe, and a liquid discharge valve is arranged on the liquid discharge pipe.

Preferably, a top cover is fixedly mounted on the top of the shell through bolts.

Preferably, the upper end of the inside of the filter element is fixedly connected with a taking and placing plate.

Compared with the prior art, the invention has the advantages and positive effects that:

1. according to the prolonged saliva suction tube, the suction tube body and the prolonged tube are matched with the connecting piece, so that the problem that the saliva suction tube is hung at the mouth corner of a patient during treatment in the prior art, the patient is subjected to dragging feeling, and the comfort of the patient is improved.

2. According to the saliva suction device, the filter element arranged inside the first connecting pipe is matched with the screw cap, so that peculiar smell in saliva can be effectively prevented from diffusing into surrounding air, the surrounding air is prevented from being polluted, and meanwhile, the filter element is convenient to clean and replace;

3. according to the saliva suction device provided by the invention, the nozzle arranged in the cylindrical connecting cylinder is matched with the cleaning pump, so that the interior of the collecting bottle can be quickly and temporarily cleaned, the phenomenon that saliva is adhered to the inner wall of the collecting bottle due to long-time non-cleaning is avoided, the subsequent cleaning work is facilitated, meanwhile, the liquid discharge pipe arranged at the bottom of the collecting bottle can timely and quickly discharge the saliva in the collecting bottle, when a large number of patients exist, the assembling and disassembling work of the collecting bottle is reduced, and the working efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed 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 creative efforts.

FIG. 1 is a schematic diagram of an architecture according to an embodiment of the present invention;

FIG. 2 is a schematic illustration of a partial explosion configuration according to an embodiment of the present invention;

FIG. 3 is an exploded view of a cylindrical connector barrel and collection bottle according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a connector according to an embodiment of the present invention;

fig. 5 is a schematic view of an explosive structure of an extended salivary suction pipe according to an embodiment of the present invention;

FIG. 6 is an enlarged view of portion A of FIG. 2;

FIG. 7 is an enlarged view of portion B of FIG. 2;

fig. 8 is an enlarged view of a portion C in fig. 5.

In the figure: 100. a mounting seat; 101. mounting holes; 201. a housing; 202. a top cover; 203. a vacuum pump; 204. a first connecting pipe; 205. a negative pressure hose; 206. an air outlet pipe; 207. cleaning the pump; 208. a water inlet pipe; 209. a second connecting pipe; 210. a water valve; 211. a water outlet hose; 212. screwing a cover; 213. a filter element; 214. taking and placing the plate; 215. a placement groove; 216. a groove; 217. a choke plate; 301. a sleeve; 302. inserting a rod; 303. a handle screw; 304. mounting blocks; 401. a cylindrical connecting cylinder; 402. a collection bottle; 403. a third connecting pipe; 404. a valve; 405. a rigid tube; 406. a spray head; 407. a connecting nozzle; 408. a liquid discharge pipe; 409. a drain valve; 501. an extension tube; 502. a straw body; 5021. a liquid suction hole; 503. a connecting member; 5031. a cylindrical tube; 5032. an arc-shaped thread sheet; 5033. and a nut.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

The invention is further described with reference to the following figures and specific examples.

Example 1

As shown in fig. 2, 4, 5 and 8, the saliva sucking extension tube provided in this embodiment includes a suction tube body 502 and an extension tube 501, one end of the suction tube body 502 is communicated with the extension tube 501 through a connector 503, the connector 503 includes a cylindrical tube 5031 and a nut 5033, the outer walls of both ends of the cylindrical tube 5031 are fixedly connected with arc threaded sheets 5032, three arc threaded sheets 5032 at the same end of the cylindrical tube 5031 are arranged at equal angles, the nut 5033 is in threaded connection with the arc threaded sheets 5032, one end of the extension tube 501 is inserted and fixed at one end of the cylindrical tube 5031, one end of the suction tube body 502 is inserted and fixed at the other end of the cylindrical tube 5031, so that the suction tube body 502 and the extension tube 501 are inserted and fixed at both ends of the cylindrical tube 5031, both ends of the cylindrical tube 5031 are tapered, in order to absorb saliva in the oral cavity of a patient conveniently, a liquid suction hole 5021 is formed in the side face of the suction pipe body 502, the suction pipe body 502 is in a U-shaped arrangement, namely the suction pipe body 502 can be bent by 180 degrees of radian, in order to avoid cross transmission of saliva among different patients, the suction pipe body 502 is a disposable saliva suction pipe, in order to guarantee the aging resistance of the extension pipe 501, the extension pipe 501 is a transparent silica gel hose, the silica gel hose has good physiological stability, the extension pipe 501 is one meter long, five millimeters in inner diameter and seven millimeters in outer diameter, the extension pipe can be conveniently stretched and extended and adjusted at any angle, the saliva suction effect is guaranteed, and the influence on the saliva suction effect caused by overlong extension pipe 501 is avoided;

when the straw tube 502 is used, one end of the straw tube 502 is inserted into one end of the cylindrical tube 5031, one end of the extension tube 501 is inserted into the other end of the cylindrical tube 5031, then the nut 5033 is screwed, so that the straw tube 502 and the extension tube 501 are pressed on the cylindrical tube 5031 by the arc-shaped thread piece 5032 to avoid falling off, when the extension tube 501 is not used, the straw tube can be hung on a dental chair frame through the connecting piece 503 to facilitate the placement of the extension tube 501, when the straw tube 502 needs to be replaced, the used straw tube 502 is pulled out of the cylindrical tube 5031 by reversely rotating the nut 5033, and then a new straw tube 502 is fixed on the cylindrical tube 5031.

Example 2

As shown in fig. 1-8, the saliva sucking device provided by this embodiment is composed of the above-mentioned extension saliva sucking tube and mounting seat 100 used in cooperation with it, a collecting bottle 402, a vacuum pump 203, a cylindrical connecting cylinder 401, and a lifting assembly;

in order to fix the mounting seat 100 on the dental chair conveniently, mounting holes 101 are formed at four corners of the mounting seat 100.

The lifting assembly comprises a sleeve 301, an inserting rod 302 and a handle screw 303 for loosening and tightening the inserting rod 302, the sleeve 301 is fixedly connected to the upper surface of the mounting base 100, the lower end of the inserting rod 302 is movably inserted into the sleeve 301, the handle screw 303 is arranged at the upper end of the sleeve 301, the top of the inserting rod 302 is fixedly connected with a mounting block 304, a cylindrical connecting cylinder 401 is fixedly connected to the mounting block 304, the lower end of the cylindrical connecting cylinder 401 fixedly penetrates through the top of the mounting block 304, the outer wall of the lower end of the cylindrical connecting cylinder 401 is provided with an external thread, the inner wall of the upper end of the collecting bottle 402 is provided with an internal thread, the collecting bottle 402 is in threaded mounting at the lower end of the cylindrical connecting cylinder 401, the height of the inserting rod 302 can be adjusted through the loosening and tightening handle screw 303, further, the height of the cylindrical connecting cylinder 401 can be adjusted, and the collecting bottle 402 can be conveniently mounted and dismounted;

the mounting seat 100 is fixedly connected with a shell 201, the vacuum pump 203 is fixedly mounted inside the shell 201, an air inlet of the vacuum pump 203 is communicated with a first connecting pipe 204, one end of the first connecting pipe 204 fixedly penetrates through the shell 201, in order to realize rapid and effective filtration of discharged gas, a filter element 213 is arranged, a placing groove 215 is formed in one end, penetrating out of the shell 201, of the first connecting pipe 204, the filter element 213 is hermetically inserted inside the placing groove 215, meanwhile, in order to facilitate replacement of the filter element 213, the lower end of the negative pressure hose 205 is connected with a screw cap 212, the screw cap 212 is fixedly connected to one end of the first connecting pipe 204 in a threaded manner, one end of the negative pressure hose 205 is communicated with the inside of the upper end of the cylindrical connecting cylinder 401, the upper end of the collecting bottle 402 is communicated with a connecting nozzle 407, the connecting nozzle 407 is communicated with one end of a third connecting pipe 403, a valve 403 is arranged at one end, far away from the connecting nozzle 407, and the other end of the valve 404 is communicated with one end of an extension pipe 501 for extending the saliva sucking pipe;

in order to avoid direct discharge of airflow blown out by the vacuum pump 203, a groove 216 is formed in the outer wall of one side, away from the first connecting pipe 204, of the shell 201, a choke plate 217 is fixedly installed inside the groove 216, an air outlet of the vacuum pump 203 is communicated with an air outlet pipe 206, one end of the air outlet pipe 206 is communicated with the inside of the groove 216, a plurality of inclined holes which incline downwards are formed in the surface of the choke plate 217, and the arrangement prevents the discharged airflow from being directly blown to the outside.

When the filter core 213 needs to be replaced, only the screw cap 212 needs to be rotated, the screw cap 212 is separated from the first connecting pipe 204, the used filter core 213 is taken out, a new filter core 213 is placed into the placing groove 215, and the screw cap 212 is screwed on the first connecting pipe 204.

In order to temporarily and effectively clean the inner wall of the collecting bottle 402 and quickly discharge saliva in the collecting bottle 402, a cleaning pump 207 and a drain pipe 408 are arranged, the drain pipe 408 is communicated with the bottom of the collecting bottle 402, a drain valve 409 is arranged on the drain pipe 408, the cleaning pump 207 is fixedly arranged in the shell 201, a water outlet of the cleaning pump 207 is communicated with a second connecting pipe 209, one end of the second connecting pipe 209 penetrates through one side of the shell 201, one end of the second connecting pipe 209, which is positioned outside the shell 201, is communicated with a water outlet hose 211, the upper end of the water outlet hose 211 is hermetically inserted into the interior of the cylindrical connecting cylinder 401, the end of the water outlet hose 211, which extends into the interior of the cylindrical connecting cylinder 401, is communicated with a hard pipe 405, the lower end of the hard pipe 405 is fixedly connected with a spray head 406, the spray head 406 is a rotary spray head, the spray head 406 extends into the interior of the collecting bottle 402, a water inlet of the cleaning pump 207 is communicated with a water inlet pipe 208, one end of the water inlet pipe 208 fixedly penetrates through the interior of the shell 201 and is communicated with an external cleaning liquid tank, and in order to ensure stable negative pressure in the collecting bottle 402, a water valve 210 is arranged on the second connecting pipe 209, and to observe the amount of the collecting bottle 402, and the transparent collecting bottle 402 is arranged for conveniently.

During the use, when needs are discharged saliva in the receiving flask 402, open scavenging pump 207 and water valve 210 and flowing back valve 409, the washing liquid sprays into receiving flask 402 via shower nozzle 406 in, wash the inner wall of receiving flask 402, the mixed liquid of saliva and washing liquid passes through fluid-discharge tube 408 and discharges, the lower extreme accessible blow off pipe of fluid-discharge tube 408 is linked together with the slop pail, this setting is convenient carries out interim, quick washing to receiving flask 402 inner wall, makes things convenient for the discharge of saliva simultaneously.

A top cover 202 is fixedly mounted on the top of the housing 201 by bolts.

Through adopting above-mentioned technical scheme, be convenient for protect the electrical apparatus in the casing 201.

The upper end of the inside of the filter element 213 is fixedly connected with a taking and placing plate 214.

By adopting the above technical scheme, the filter element 213 is conveniently taken and placed.

For the convenience of understanding the technical solutions of the present invention, the following detailed description will be made on the working principle or the operation mode of the present invention in the practical process.

In practical application, one end of the straw tube 502 is inserted into one end of the column tube 5031, one end of the extension tube 501 is inserted into the other end of the column tube 5031, then the nut 5033 is screwed to enable the arc-shaped threaded sheet 5032 to press the straw tube 502 and the extension tube 501 on the column tube 5031 to prevent the extension tube from falling off, then one end of the straw tube 502 with the liquid suction hole 5021 is placed in the oral cavity of a patient, the angle is adjusted, then the vacuum pump 203 is started to draw out air in the collection bottle 402 to enable the interior of the collection bottle 402 to be always in a negative pressure state, then the valve 404 is opened, saliva enters the collection bottle 402 through the extension saliva suction tube, the air is filtered and adsorbed by the filter element 213 and then is discharged by the air outlet tube 206, when the saliva in the collection bottle 402 needs to be discharged, the cleaning pump 207, the water valve 210 and the liquid discharge valve 409 are opened, the cleaning liquid is sprayed into the collection bottle 402 through the spray head 406 to flush the inner wall of the collection bottle 402, the mixed liquid of the saliva and the cleaning liquid is discharged through the liquid discharge tube 408, and the lower end of the waste discharge tube 408 is communicated with the waste water discharge barrel; when the collection bottle 402 needs to be thoroughly cleaned, the collection bottle 402 is unscrewed from the cylindrical connecting cylinder 401 and placed in a cleaning device for cleaning.

The present invention can be easily implemented by those skilled in the art from the above detailed description. It should be understood, however, that the intention is not to limit the invention to the particular embodiments described. On the basis of the disclosed embodiments, a person skilled in the art can combine different technical features at will, thereby implementing different technical solutions.

Claims

1. A saliva suction device, which is characterized in that: the saliva suction device comprises an extension saliva suction pipe, wherein the extension saliva suction pipe comprises a suction pipe body (502) and an extension pipe (501), one end of the suction pipe body (502) is communicated with the extension pipe (501) through a connecting piece (503), and the suction pipe body (502) is a disposable saliva suction pipe;

inhale saliva device still includes: the collecting bottle (402) is arranged on the mounting seat (100) through a lifting assembly, and mounting holes (101) are formed in four corners of the mounting seat (100);

the lifting assembly comprises a sleeve (301), the sleeve (301) is fixedly connected to the upper surface of the mounting base (100), an insertion rod (302) is movably inserted into the sleeve (301), a handle screw (303) used for tightening and loosening the insertion rod (302) is arranged at the upper end of the sleeve (301), a mounting block (304) is fixedly connected to the top of the insertion rod (302), a cylindrical connecting cylinder (401) is fixedly connected to the mounting block (304), the lower end of the cylindrical connecting cylinder (401) fixedly penetrates through the top of the mounting block (304), external threads are formed in the outer wall of the lower end of the cylindrical connecting cylinder (401), internal threads are formed in the inner wall of the upper end of the collecting bottle (402), and the collecting bottle (402) is installed at the lower end of the cylindrical connecting cylinder (401) in a threaded mode;

a shell (201) is fixedly connected to the mounting seat (100), a vacuum pump (203) and a cleaning pump (207) are fixedly mounted in the shell (201) respectively, an air inlet of the vacuum pump (203) is communicated with a first connecting pipe (204), one end of the first connecting pipe (204) fixedly penetrates through the shell (201), a placing groove (215) is formed in one end, penetrating out of the shell (201), of the first connecting pipe (204), a filter element (213) is connected in the placing groove (215) in a sealing and sealing manner, the lower end of a negative pressure hose (205) is connected with a spiral cover (212), the spiral cover (212) is fixedly connected to one end of the first connecting pipe (204) in a threaded manner, one end of the negative pressure hose (205) is communicated with the inside of the upper end of the cylindrical connecting cylinder (401), the upper end of the collecting bottle (402) is communicated with a connecting nozzle (407), the connecting nozzle (407) is communicated with one end of a third connecting pipe (403), a valve (404) is arranged at one end, far away from the connecting nozzle (407), the other end of the connecting pipe (403) is communicated with one end of the connecting pipe (501), an extension plate (216) is arranged at one side, an extension plate (217) far away from the outer wall of the shell (201), and a groove (216) is formed in the connecting pipe (216) is arranged on one side of the connecting pipe (217), an air outlet of the vacuum pump (203) is communicated with an air outlet pipe (206), one end of the air outlet pipe (206) is communicated with the inside of the groove (216), and the surface of the choke plate (217) is provided with a plurality of inclined holes which incline downwards;

a water outlet of the cleaning pump (207) is communicated with a second connecting pipe (209), a water valve (210) is arranged on the second connecting pipe (209), one end of the second connecting pipe (209) penetrates through one side of the shell (201), one end, located on the outer side of the shell (201), of the second connecting pipe (209) is communicated with a water outlet hose (211), the upper end of the water outlet hose (211) is inserted into the cylindrical connecting cylinder (401) in a sealing mode, the end, extending into the cylindrical connecting cylinder (401), of the water outlet hose (211) is communicated with a rigid pipe (405), the lower end of the rigid pipe (405) is fixedly connected with a spray head (406), the spray head (406) extends into the collecting bottle (402), a water inlet of the cleaning pump (207) is communicated with a water inlet pipe (208), and one end of the water inlet pipe (208) fixedly penetrates through the interior of the shell (201) and is communicated with an external cleaning liquid tank;

the lower end of the collecting bottle (402) is communicated with a liquid discharge pipe (408), and a liquid discharge valve (409) is arranged on the liquid discharge pipe (408).

2. A saliva suction device according to claim 1, wherein: the extension pipe (501) is a transparent silica gel hose.

3. A saliva suction device according to claim 2, wherein: a liquid suction hole (5021) is formed in the side face of the straw body (502), and the straw body (502) is arranged in a U shape.

4. A saliva ejector according to claim 3, wherein: the length of extension pipe (501) is a meter, and internal diameter is five millimeters and the external diameter is seven millimeters.

5. A saliva ejector according to claim 4, wherein: the connecting piece (503) comprises a cylindrical pipe (5031) and a nut (5033), the outer walls of two ends of the cylindrical pipe (5031) are fixedly connected with arc-shaped threaded sheets (5032), three arc-shaped threaded sheets (5032) are arranged at the same end of the cylindrical pipe (5031) at equal angles, the nut (5033) is in threaded connection with the arc-shaped threaded sheets (5032), one end of the extension pipe (501) is inserted and fixed at one end of the cylindrical pipe (5031), and one end of the suction pipe body (502) is fixedly inserted and connected at the other end of the cylindrical pipe (5031).

6. A saliva ejector according to claim 5, wherein: the two ends of the cylindrical tube (5031) are arranged in a conical shape.

7. A saliva suction device according to claim 6, characterised in that: the top of the shell (201) is fixedly provided with a top cover (202) through bolts.

8. A saliva suction device according to claim 7, characterised in that: the upper end of the inside of the filter element (213) is fixedly connected with a taking and placing plate (214).