CN114099015A

CN114099015A - Pneumatic sand blasting machine for dentistry

Info

Publication number: CN114099015A
Application number: CN202111628886.0A
Authority: CN
Inventors: 王蕴华; 邝树标; 徐文辉
Original assignee: Guangzhou Conghua Shenghua Industrial Co ltd
Current assignee: Guangzhou Conghua Shenghua Industrial Co ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-03-01
Anticipated expiration: 2041-12-28
Also published as: CN114099015B

Abstract

The invention relates to a dental pneumatic sand blasting machine which comprises a pipe body, a sand bottle, a sand blasting channel, an air conveying channel, a pneumatic motor and a nozzle, wherein the sand blasting channel, the air conveying channel and the pneumatic motor are all arranged in the pipe body, the sand blasting channel is arranged in front of the air conveying channel, the air conveying channel and the sand blasting channel are respectively communicated with the sand bottle, the nozzle is arranged at the front end of the pipe body, the nozzle comprises a shell, a spray pipe and a spiral pipe, one end of the shell is fixed in the pipe body, one end of the spray pipe is fixedly sleeved in the shell, the other end of the spray pipe penetrates out of the shell, one end of the spiral pipe is rotatably arranged in the spray pipe, and the other end of the spiral pipe is connected with the pneumatic motor and communicated with the sand blasting channel. The present application has the effect of improving the efficiency of removing attachments from the surface of teeth.

Description

Pneumatic sand blasting machine for dentistry

Technical Field

The invention relates to the field of tooth cleaning equipment, in particular to a dental pneumatic sand blasting machine.

Background

At present, a pneumatic sand blasting machine is a dental special instrument commonly used in the market at present, and is often applied to dentistry as a device for quickly cleaning and whitening teeth for surface cleaning and micro-roughening treatment before bonding. The pneumatic sand blasting machine drives special particles to the surface of the tooth through high-pressure air flow to remove attachments on the surface of the tooth which is not easy to scrape, the sand blasting can clean tea dirt, smoke dirt and food soft dirt attached on the tooth softly in a moment, and can clean the pit and ditch gaps of the tooth which cannot be cleaned by the ultrasonic tooth cleaning machine, and the tooth which is subjected to sand blasting is very smooth and is not easy to deposit tartar again.

In the related technology, the particles sprayed by the pneumatic sand blasting machine are mainly removed by the impact force to remove attachments on the surface of teeth, and for some attachments which are firmly adhered, the attachments can be removed only by repeatedly carrying out sand blasting, so that the removal efficiency is low.

In view of the above-mentioned related art, the inventors considered that there is a drawback that the efficiency of removing the attached matter from the tooth surface by the particles ejected from the pneumatic blasting machine is low.

Disclosure of Invention

In order to improve the efficiency of removing the attachments of the particles sprayed by the pneumatic sand blasting machine to the tooth surface, the application provides the pneumatic sand blasting machine for dentistry.

The application provides a pneumatic sand blasting machine for dentistry adopts following technical scheme:

the utility model provides a pneumatic sand blasting machine for dentistry, includes body, sand bottle, sandblast way, gas transmission way, pneumatic motor and nozzle, the sandblast is said, gas transmission way and pneumatic motor are all located in the body, the sandblast is said and is located the place ahead of gas transmission way, gas transmission way and sandblast are said and are linked together respectively the sand bottle, the nozzle is located the front end of body, the nozzle includes shell, spray tube and coil, the one end of shell is fixed in the body, the fixed cover of one end of spray tube is located in the shell, the other end of spray tube is worn out the shell, the one end of coil rotate install in the spray tube, the other end of coil is connected pneumatic motor and intercommunication the sandblast is said.

By adopting the technical scheme, high-pressure gas enters the sand bottle through the gas transmission channel, particles in the sand bottle are blown up, then the high-pressure gas drives the particles to enter the sand blasting channel and enter the coil pipe through the sand blasting channel, the pneumatic motor drives the coil pipe to rotate, the particles in the coil pipe generate a motion in the same direction as the rotation direction of the coil pipe under the action of friction force, the particles in the coil pipe move forwards under the action of the high-pressure gas and then are sprayed out from the nozzle of the spray pipe through the coil pipe, the sprayed particles simultaneously have the motion direction which is the same as the axial direction of the spray pipe and is tangent to the nozzle of the spray pipe, when the sprayed particles are contacted with attachments on the surface of teeth, the motion direction which is the same as the axial direction of the spray pipe can impact the attachments, so that the attachments are loosened, and the motion direction which is tangent to the nozzle of the spray pipe can apply a lateral acting force to the attachments, so that the attachments leave the original position, thereby improving the efficiency of the attachment.

Preferably, the air inlet of the pneumatic motor is connected with an air inlet pipe, the air inlet pipe is arranged in the pipe body, and one end, far away from the pneumatic motor, of the air inlet pipe is arranged at the rear end of the pipe body and communicated with the rear end of the air conveying passage.

Through adopting above-mentioned technical scheme, the intake pipe communicates with the rear end of gas transmission way for an air supply can be shared to intake pipe and gas-supply pipe, only needs to connect an air supply pipe just can realize ventilating of intake pipe and gas-supply pipe.

Preferably, the pneumatic motor is installed in the middle of the pipe body, the pneumatic motor is connected with the coil pipe through a transmission mechanism, and the transmission mechanism is installed in the pipe body.

Through adopting above-mentioned technical scheme, pneumatic motor installs and can reduce the influence of pneumatic motor to the size of the diameter of the front end of body at the middle part of body, and the size of the front end of body can design as required, avoids influencing the condition emergence of the convenience that pneumatic sand blasting machine used because pneumatic motor leads to the front end of body too big.

Preferably, the transmission mechanism comprises a transmission shaft, a driving bevel gear, a driven bevel gear and a connecting rod, the transmission shaft is rotatably connected with the pipe body, one end of the transmission shaft is fixedly connected with the output shaft of the pneumatic motor, the other end of the transmission shaft is fixedly connected with the driving bevel gear, the driven bevel gear is meshed with the driving bevel gear, the driven bevel gear is fixedly connected with the connecting rod, the connecting rod is rotatably connected with the pipe body, and one end, far away from the driven bevel gear, of the connecting rod is connected with the coil pipe.

Through adopting above-mentioned technical scheme, through the setting of drive bevel gear and driven bevel gear, realize the change of direction of rotation to can set the direction that has certain contained angle with the body with the coil, be convenient for clean tooth operation and staff observe.

Preferably, the coil is close to the one end fixedly connected with connector of connecting rod, the connecting rod is kept away from driven bevel gear's one end fixedly connected with the sleeve of connector butt joint, the connection can be dismantled to the connector the sleeve.

Through adopting above-mentioned technical scheme, through being connected of connector and telescopic, change nozzle that can convenient and fast.

Preferably, the connector and the sleeve are mutually clamped, and the connection and the separation of the connector and the sleeve are realized by pushing and pulling.

Through adopting above-mentioned technical scheme, the mutual joint of connector and sleeve can realize connecting fast to connect stably safely.

Preferably, the inner wall of the coil is fixedly provided with a spiral sheet, and the length direction of the spiral sheet is consistent with that of the coil.

Through adopting above-mentioned technical scheme, the flight can improve the rotational speed of the particle in the whirl for the particle that the spray tube jetted has bigger lateral velocity, thereby improves the clear efficiency of the attachment on tooth surface.

Preferably, the water pipe further comprises a water conveying channel, the water conveying channel is arranged in the pipe body, a water cavity is arranged between the outer wall of the spray pipe and the inner wall of the shell, the water cavity surrounds the spray pipe, the shell is provided with a plurality of water through holes, two ends of each water through hole are respectively communicated with the water cavity and the water conveying channel, a plurality of water outlets communicated with the water cavity are formed between the inner wall of one end, far away from the pipe body, of the shell and the outer wall of the spray pipe, and the water outlets are arranged around the spray pipe at intervals.

Through adopting above-mentioned technical scheme, the water that sprays away from the delivery port can surround the particle that sprays away from the spray tube, reduces the condition that the particle splashes toward all around, improves the concentration and the utilization ratio of particle.

Preferably, the pipe body comprises a front pipe and a rear pipe, the front pipe and the rear pipe are mutually rotatably connected through a rotator, and the nozzle and the pneumatic motor are fixed on the front pipe.

Through adopting above-mentioned technical scheme, in the treatment process, can rotate the head tube as required, adjust the nozzle to any angle of wanting, improve work efficiency.

Preferably, the rear end of the front pipe is fixedly connected with a rotary joint, the front end of the rear pipe is fixedly connected with a mounting seat, the rotary joint is rotatably connected with the mounting seat and forms sealing connection, the sand conveying channel comprises a front sand channel and a rear sand channel, the water conveying channel comprises a front water channel and a rear water channel, the front sand channel and the front water channel are respectively installed in the front pipe, the rear sand channel and the rear water channel are respectively installed in the rear pipe, the rear end of the front sand channel and the rear end of the front water channel are respectively penetrated through the rotary joint, the rear end of the front sand channel protrudes out of the rear end surface of the rotary joint, the axis of the rear end of the front sand channel coincides with the rotation center line of the rotary joint, the rear end of the front sand channel is rotatably sleeved with the front end of the rear sand channel, and the front end of the rear sand channel and the front end of the rear water channel respectively penetrate through the front end surface of the mounting seat, an annular transition cavity is arranged between the rear end face of the rotary joint and the front end face of the mounting seat, and the rear end of the front water channel and the front end of the rear water channel are communicated with the transition cavity respectively.

Through adopting above-mentioned technical scheme, anterior sand is said and is said can dock smoothly through rotary joint and mount pad with rear portion sand to anterior sand is said and can is rotated along with the head tube, and anterior water course and rear portion water course pass through the transition chamber and connect, makes anterior water course can rotate along with the head tube, and the angle of rotatory nozzle can not influence the transport of particle and the transport of water.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the pneumatic motor drives the coil to rotate, the particles in the coil generate a motion in the same direction as the rotation direction of the coil under the action of friction force, the particles sprayed out of the nozzle have a motion direction tangential to the nozzle of the nozzle, and when the sprayed particles are contacted with attachments on the surface of teeth, the motion direction tangential to the nozzle of the nozzle can apply a lateral acting force on the attachments so that the attachments leave the original positions, thereby improving the clarity efficiency of the attachments;

2. the pneumatic motor is arranged in the middle of the pipe body and is connected with the coil pipe through the transmission mechanism, so that the influence of the pneumatic motor on the diameter of the front end of the pipe body can be reduced, the size of the front end of the pipe body can be designed according to needs, and the situation that the use convenience of the pneumatic sand blasting machine is influenced due to the fact that the front end of the pipe body is too large due to the pneumatic motor is avoided;

3. the transmission mechanism is provided with a driving bevel gear and a driven bevel gear to realize the change of the rotating direction, so that the coil can be arranged in the direction with a certain included angle with the pipe body, and the tooth cleaning operation and the observation of workers are facilitated.

Drawings

Fig. 1 is a schematic cross-sectional view of a dental pneumatic blasting machine according to an embodiment of the present application.

FIG. 2 is a schematic cross-sectional view of a nozzle of an embodiment of the present application.

Fig. 3 is an enlarged view at a in fig. 1.

Fig. 4 is an enlarged view at B in fig. 1.

Description of reference numerals: 1. a pipe body; 11. a head tube; 12. a rear tube; 13. a rotary joint; 14. a mounting seat; 15. a rotator; 2. a sand bottle; 3. a sand blasting channel; 4. a gas delivery passage; 5. a pneumatic motor; 6. a nozzle; 61. a housing; 62. a nozzle; 63. coiling; 64. a connector; 65. a spiral sheet; 66. a water chamber; 67. a water through hole; 68. a straight rod; 7. a transmission mechanism; 71. a drive shaft; 72. a drive bevel gear; 73. a driven bevel gear; 74. a connecting rod; 75. a sleeve; 8. an air inlet pipe; 9. a water delivery channel.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a pneumatic sand blasting machine for dentistry. Referring to fig. 1 and 2, a pneumatic sand blasting machine for dentistry includes body 1, sand bottle 2, the sandblast is said 3, air transmission way 4, pneumatic motor 5 and nozzle 6, the sandblast is said 3, air transmission way 4 and pneumatic motor 5 all locate in body 1, the front end of body 1 is located to sandblast way 3, the rear end of body 1 is located to air transmission way 4, the front end of air transmission way 4 and the rear end of sandblast way 3 communicate sand bottle 2 respectively, the rear end of body 1 is located to the rear end of air transmission way 4, the front end of sandblast way 3 communicates nozzle 6, nozzle 6 locates the front end of body 1, the axis of nozzle 6 becomes the forty-five degree contained angle with the axis of body 1, be convenient for observe the clean tooth process of nozzle 6. The nozzle 6 comprises a shell 61, a spray pipe 62 and a coil 63, wherein the shell 61 is cylindrical, the shell 61, the spray pipe 62 and the coil 63 are coaxial, one end of the shell 61 is fixedly sleeved at the front end of the pipe body 1 and can be detached, the shell 61 is connected with the pipe body 1 in a sealing manner, one end of the spray pipe 62 is fixedly sleeved in the shell 61, the other end of the spray pipe 62 penetrates out of the shell 61, the inner walls of the two ends of the spray pipe 62 are respectively provided with an annular groove, and a bearing is installed in the annular groove. The coil 63 is connected with the spray pipe 62 through the bearing rotation in the two annular grooves and forms sealing connection with the spray pipe 62, the pneumatic motor 5 is connected with one end of the coil 63 and is communicated with the sand blasting channel 3, the other end of the coil 63 is arranged in the spray pipe 62, and the pneumatic motor 5 drives the coil 63 to rotate, so that particles of the coil 63 rotate along with the particles. The inner wall of the coil 63 is fixedly provided with a spiral sheet 65, the length direction of the spiral sheet 65 is consistent with the length direction of the coil 63, and the spiral sheet 65 improves the rotation speed of particles in the coil 63, so that the particles sprayed by the spray pipe 62 have larger lateral speed.

Pneumatic motor 5 installs in the middle part of body 1, and pneumatic motor 5 passes through drive mechanism 7 and connects coil 63, and drive mechanism 7 installs in body 1, reduces pneumatic motor 5 to the influence of the size of the diameter of the front end of body 1 to can design the front end of body 1 less, facilitate the use. The air inlet of pneumatic motor 5 is connected with intake pipe 8, and the gas vent of pneumatic motor 5 is connected with the blast pipe, and intake pipe 8 and blast pipe are all located in body 1, and intake pipe 8 is kept away from the fixed rear end of locating body 1 of one end of pneumatic motor 5 and is communicate with the rear end of gas transmission way 4 for an air supply connecting pipe can be shared to intake pipe 8 and gas transmission pipe. One end of the exhaust pipe, which is far away from the pneumatic motor 5, penetrates through the side wall of the pipe body 1, and the gas passing through the pneumatic motor 5 is discharged from one end of the exhaust pipe, which is far away from the pneumatic motor 5.

Referring to fig. 1 and 3, the transmission mechanism 7 includes a transmission shaft 71, a driving bevel gear 72, a driven bevel gear 73 and a connecting rod 74, the transmission shaft 71 is rotatably connected to the pipe body 1, one end of the transmission shaft 71 is fixedly connected to the output shaft of the air motor 5 and is coaxial with the output shaft of the motor, the other end of the transmission shaft 71 is fixedly connected to the driving bevel gear 72, the driven bevel gear 73 is engaged with the driving bevel gear 72, the driven bevel gear 73 is fixedly connected to the connecting rod 74, the connecting rod 74 is rotatably connected to the pipe body 1, and one end of the connecting rod 74 away from the driven bevel gear 73 is connected to the coil 63. The driving bevel gear 72 and the driven bevel gear 73 change the rotation direction of the motor to be transmitted to the coil 63, so that the requirement that the included angle between the axis of the nozzle 6 and the axis of the pipe body 1 is forty-five degrees is met.

Referring to fig. 2 and 3, one end of the coil 63 close to the connecting rod 74 is fixedly connected with a connector 64 through a plurality of straight rods 68, the straight rods 68 are fixed on the outer wall of the coil 63, the connector 64 is a cuboid, one end of the connecting rod 74 far away from the driven bevel gear 73 is fixedly connected with a sleeve 75 butted with the connector 64, an inner hole of the sleeve 75 is a square hole, the sleeve 75 is arranged on one side of the sand blasting channel 3 and is rotationally connected with the pipe body 1, the sleeve is connected with the pipe body 1 through a bearing in a sealing and rotating mode, and the connector 64 can be detachably connected with the sleeve 75. Connector 64 and sleeve 75 can be dismantled and be connected and realize through the joint, be equipped with spacing hole on four sides of connector 64 respectively, slidable mounting has the gag lever post in the spacing hole, be equipped with spacing spring between the bottom in gag lever post and spacing hole, the both ends of spacing spring are the bottom in fixed connection gag lever post and spacing hole respectively, the gag lever post is kept away from the one end protrusion spacing hole of spring, the one end that the spring was kept away from to the gag lever post is equipped with the circular cone spigot surface, spacing downthehole is located to the one end of circular cone spigot surface, the other end of circular cone spigot surface is located outside the spacing hole. Be equipped with the spacing groove on the four sides lateral wall of sleeve 75's hole respectively, when the connector 64 targets in place in inserting sleeve 75, the one end card of gag lever post is gone into to the spacing groove, make connector 64 and sleeve 75 reciprocal anchorage, when pulling connector 64 hard, the circular cone spigot surface is by the lateral wall extrusion of spacing groove, in the spacing hole of retracting gradually, when the gag lever post is whole to break away from the spacing groove, connector 64 and sleeve 75 can be pulled relatively, with connector 64 and sleeve 75 alternate segregation, realize nozzle 6's convenient and fast change.

Referring to fig. 1, 2 and 3, a water supply passage 9 for supplying water is installed in the pipe body 1, and both ends of the water supply passage 9 are respectively provided at both ends of the pipe body 1. Be equipped with water cavity 66 between the outer wall of spray tube 62 and the inner wall of shell 61, water cavity 66 encircles spray tube 62, the lateral wall of casing is equipped with a plurality of evenly distributed's limbers 67, be equipped with sealed chamber of being connected between the outer wall of casing and the lateral wall of body 1, water cavity 66 and connection chamber are connected respectively to the both ends of limbers 67, the casing is kept away from and is equipped with the delivery port of a plurality of intercommunication water cavities 66 between the inner wall of the one end of body 1 and the outer wall of spray tube 62, a plurality of delivery ports encircle spray tube 62 interval and lay, the delivery port is the crescent. Water passes through water delivery way 9, connection chamber, limbers 67, water cavity 66 respectively, jets out from the delivery port, and the spun water will surround from the particle that spray tube 62 jetted out, reduces the condition that the particle splashes around, improves the concentration and the utilization ratio of particle, and simultaneously, spun water can be with the particle circle that jets out in the range of surrounding around of water, avoids having the particle dispersion of lateral movement speed.

Referring to fig. 4, the tube body 1 includes a front tube 11 and a rear tube 12, the front tube 11 and the rear tube 12 are rotatably connected to each other by a rotator 15, a nozzle 6 is provided at a front end of the front tube 11, a pneumatic motor 5 is provided at a middle portion of the front tube 11, and a flask 2 is mounted on the rear tube 12. The rotating device 15 comprises a rotating cylinder, the inner wall of the front end of the rotating cylinder is in threaded connection with the outer wall of the rear end of the front pipe 11 and is fixed with the front pipe 11, an annular step-shaped protrusion is arranged on the inner wall of the rear end of the rotating cylinder, a groove matched with the protrusion is formed in the outer wall of the front end of the rear pipe 12, the protrusion is clamped into the groove, the rear end of the rotating cylinder is clamped with the front end of the rear pipe 12 through the protrusion, the rotating cylinder is rotatably connected with the rear pipe 12, the axis displacement of the front pipe 11 and the rear pipe 12 is limited, and the mutual rotation of the front pipe 11 and the rear pipe 12 is not limited. The rear end fixedly connected with rotary joint 13 of front tube 11, the front end fixedly connected with mount pad 14 of rear tube 12, rotary joint 13 rotates and connects mount pad 14 and forms sealing connection, is equipped with annular first transition chamber and annular second transition chamber between rotary joint 13's the rear end face and the preceding terminal surface of mount pad 14, and first transition chamber and second transition chamber separate each other not communicate with each other, and first transition chamber cover is located the second transition intracavity. The sand conveying channel comprises a front sand channel and a rear sand channel, the sand conveying channel 9 comprises a front water channel and a rear water channel, the air inlet pipe 8 comprises a front air pipe and a rear air pipe, the front sand channel, the front water channel and the front air pipe are respectively installed in the front pipe 11, the rear end of the front sand channel, the rear end of the front water channel and the rear end of the front air pipe respectively penetrate through the rear end face of the rotary joint 13, the rear end of the front water channel is communicated with the first transition cavity, and the rear end of the front air pipe is communicated with the second transition cavity. The rear sand channel, the rear water channel and the rear air pipe are respectively arranged in the rear pipe 12, the front end of the rear sand channel, the front end of the rear water channel and the front end of the rear air pipe respectively penetrate through the front end face of the mounting seat 14, the front end of the rear water channel is communicated with the first transition cavity, and the front end of the rear air pipe is communicated with the second transition cavity. The rear end of the front sand channel, the front end of the rear sand channel, the rotary joint 13 and the central axis of the front pipe 11 are coincided, the rear end of the front sand channel protrudes out of the rear end face of the rotary joint 13, and the rear end of the front sand channel is rotatably connected with the front end of the rear sand channel and sealed through a rubber sealing ring. The rear end of the rear pipe 12 is connected with a quick connector, and the quick connector is connected with the rear pipe 12 in an inserting mode.

The implementation principle of the pneumatic sand blasting machine for the dental department in the embodiment of the application is as follows: high-pressure gas enters the sand bottle 2 through the gas transmission channel 4, particles in the sand bottle 2 are blown up, and then the high-pressure gas flow drives the particles to enter the sand blasting channel 3 and enter the coil 63 through the sand blasting channel 3. The pneumatic motor 5 drives the coil 63 to rotate, the particles in the coil 63 are subjected to friction force to generate movement in the same direction as the rotation direction of the coil 63, meanwhile, the particles in the coil 63 move forwards under the action of high-pressure gas and then are ejected out of the nozzle 62 through the coil 63, and the ejected particles have the movement directions which are the same as the axial direction of the nozzle 62 and tangential to the nozzle of the nozzle 62. When the sprayed particles contact with attachments on the surfaces of teeth, the movement direction which is the same as the axial direction of the spray pipe 62 impacts the attachments to loosen the attachments, and the movement direction which is tangential to the nozzle of the spray pipe 62 exerts a lateral acting force on the attachments to enable the attachments to be separated from the original position, so that the attachment cleaning efficiency is improved. Water is sprayed out from the water outlet through the water conveying channel 9, the connecting cavity, the water through hole 67 and the water cavity 66 respectively, and particles sprayed out from the spray pipe 62 are surrounded by the sprayed water, so that the situation that the particles splash around is reduced. In the use process, the rear pipe 12 is held by hands, the front pipe 11 can be rotated according to the requirement, the nozzle 6 is adjusted to the required angle, and the use is convenient.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a pneumatic sand blasting machine for dentistry which characterized in that: comprises a pipe body (1), a sand bottle (2), a sand blasting channel (3), a gas transmission channel (4), a pneumatic motor (5) and a nozzle (6), wherein the sand blasting channel (3), the gas transmission channel (4) and the pneumatic motor (5) are all arranged in the pipe body (1), the sand blasting channel (3) is arranged in the front of the gas transmission channel (4), the gas transmission channel (4) and the sand blasting channel (3) are respectively communicated with the sand bottle (2), the nozzle (6) is arranged at the front end of the pipe body (1), the nozzle (6) comprises a shell (61), a spray pipe (62) and a coil pipe (63), one end of the shell (61) is fixed on the pipe body (1), one end of the spray pipe (62) is fixedly arranged in the shell (61), the other end of the spray pipe (62) penetrates out of the shell (61), one end of the coil pipe (63) is rotatably arranged in the spray pipe (62), the other end of the coil pipe (63) is connected with the pneumatic motor (5) and communicated with the sand blasting channel (3).

2. A dental pneumatic blasting machine according to claim 1, wherein: the air inlet of pneumatic motor (5) is connected with intake pipe (8), intake pipe (8) are located in body (1), intake pipe (8) are kept away from the one end of pneumatic motor (5) is located the rear end of body (1) and with the rear end intercommunication of defeated air flue (4).

3. A dental pneumatic blasting machine according to claim 1, wherein: the pneumatic motor (5) is installed in the middle of the pipe body (1), the pneumatic motor (5) is connected with the coil pipe (63) through a transmission mechanism (7), and the transmission mechanism (7) is installed in the pipe body (1).

4. A dental pneumatic blasting machine according to claim 3, wherein: the transmission mechanism (7) comprises a transmission shaft (71), a driving bevel gear (72), a driven bevel gear (73) and a connecting rod (74), the transmission shaft (71) is rotatably connected with the pipe body (1), one end of the transmission shaft (71) is fixedly connected with an output shaft of the pneumatic motor (5), the other end of the transmission shaft (71) is fixedly connected with the driving bevel gear (72), the driven bevel gear (73) is meshed with the driving bevel gear (72), the driven bevel gear (73) is fixedly connected with the connecting rod (74), the connecting rod (74) is rotatably connected with the pipe body (1), and one end, far away from the driven bevel gear (73), of the connecting rod (74) is connected with the spiral pipe (63).

5. A dental pneumatic blasting machine according to claim 4, wherein: coil (63) are close to the one end fixedly connected with connector (64) of connecting rod (74), connecting rod (74) are kept away from the one end fixedly connected with of driven bevel gear (73) with sleeve (75) that connector (64) docks, connection can be dismantled in connector (64) sleeve (75).

6. A dental pneumatic blasting machine according to claim 5, wherein: the connector (64) and the sleeve (75) are mutually clamped, and the connector (64) and the sleeve (75) are connected and separated through pushing and pulling.

7. A dental pneumatic blasting machine according to claim 1, wherein: the inner wall of the coil (63) is fixedly provided with a spiral sheet (65), and the length direction of the spiral sheet (65) is consistent with that of the coil (63).

8. A dental pneumatic blasting machine according to claim 1, wherein: still include water delivery way (9), water delivery way (9) are located in body (1), the outer wall of spray tube (62) with be equipped with water cavity (66) between the inner wall of shell (61), water cavity (66) encircle spray tube (62), shell (61) are equipped with a plurality of limbers (67), the both ends of limbers (67) communicate respectively water cavity (66) and water delivery way (9), the casing is kept away from the inner wall of the one end of body (1) with be equipped with a plurality of intercommunications between the outer wall of spray tube (62) the delivery port of water cavity (66), it is a plurality of the delivery port encircles spray tube (62) interval is laid.

9. A dental pneumatic blasting machine according to claim 8, wherein: the pipe body (1) comprises a front pipe (11) and a rear pipe (12), the front pipe (11) and the rear pipe (12) are connected in a mutually rotating mode through a rotating device (15), and the nozzle (6) and the air motor (5) are fixed on the front pipe (11).

10. A dental pneumatic blasting machine according to claim 9, wherein: the rear end fixed connection of preceding pipe (11) has rotary joint (13), the front end fixed connection of back pipe (12) has mount pad (14), rotary joint (13) rotate to be connected mount pad (14) and form sealing connection, defeated sand way includes anterior sand way and rear portion sand way, defeated water way (9) include anterior water course and rear portion water course, anterior sand way and anterior water course install respectively in preceding pipe (11), rear portion sand way and rear portion water course install respectively in back pipe (12), the rear end of anterior sand way and the rear end of anterior water course run through rotary joint (13) respectively, the rear end protrusion of anterior sand way the rear end face of rotary joint (13) and the axis of the rear end of anterior sand way with the axis of rotation coincidence of rotary joint (13), the rear end of anterior sand way with the front end of rear portion sand way cup joints, the front end of the rear sand channel and the front end of the rear water channel penetrate through the front end face of the mounting seat (14) respectively, an annular transition cavity is formed between the rear end face of the rotary joint (13) and the front end face of the mounting seat (14), and the rear end of the front water channel and the front end of the rear water channel are communicated with the transition cavity respectively.