CN209107638U - A kind of nozzle assembly - Google Patents

Abstract

The purpose of this utility model is to provide a kind of nozzle assembly, there is gas pipeline in nozzle assembly, gas pipeline includes tube body and connector, and connector has tight lock part and linkage section.

Description

A kind of nozzle assembly

Technical field

The utility model relates to type medical instrument for dental use field, especially a kind of nozzle assembly.

Background technique

Cleaning one's teeth is a kind of good teeth caring means, and the primary measure for the treatment of periodontosis.It periodically cleans one's teeth and not only may be used To thoroughly remove the plaque and calculus on tooth, periodontium is allowed to keep fit, prevents and treats periodontosis.Moreover, being easy when cleaning one's teeth It was found that tiny, not noticeable odontopathy, such as hidden saprodontia, achieve the purpose that early discovery early treatment.

It is plus high pressure water that the tea stain being attached on tooth, crock and soft dirt cleaning in kind is dry by pearl salt that sandblasting, which cleans one's teeth, Only, the tooth after sandblasting cleaning is very smooth, and is not easy to deposit calculus dentalis again, therefore, usually suggests that toothwash and sandblasting combine It carries out.

Pneumatic dental sand blasting unit by one is mixed with the abrasive powder jet stream of air and water to carry out dental procedure, Pneumatic dental sand blasting unit includes cylinder block set and nozzle assembly, cylinder block set and nozzle assembly socket connection；

Cylinder block set includes the integrated powder container (also referred to as sand chamber) for storing predetermined quantity powder, for being pressurized Air and the air supply line being connected in powder container, for conveying the transmission line for being mixed with the powder of air, with water source phase Water supply line even and the body connector being connected with nozzle；Transmission line one end is connected in powder container, the other end exposes to machine Body connector；Body connector portions are provided with the water export of water supply line, and there are two sealing ring, water export exists the axial direction of body connector Between two sealing rings；

Nozzle assembly includes nozzle housing, nozzle, water output line and air-powder output line, and nozzle has aquaporin and sky Gas powder channel, air-powder channel is within aquaporin；Nozzle has the flow inlet and air-powder output of water output line The gas feed of line, nozzle housing are connect with body joint sealing；When the connection of nose assembly and nozzle assembly is connected, transmission line and Air-powder output line is connected.

Sand-blasting machine in use, cylinder block set and nozzle assembly grafting in place, region before two sealing rings, which is formed, holds water Gap；It inputs pressurized air and water, the communicated line of air-powder and air-powder output line to spray from air-powder channel, water warp Water supply line, water containing space gap and water output line are sprayed from aquaporin.

Current sand-blasting machine has the following deficiencies: 1, the part being connected within body connector and nozzle housing with body connector It is that metal material is made, manufacturing cost is high, and after multiple plug, wears between metal, lead to cylinder block set Connection with nozzle assembly loosens.2, after transmission line and the multiple plug of air-powder output line, the leakproofness of connection declines, and is easy There is sand leakage, stifled sand.3, in a ring, water flow annularly scatters aquaporin, and jet power is smaller.

Summary of the invention

The purpose of this utility model is to provide a kind of nozzle assemblies for the Pneumatic dental sand blasting unit that processing cost reduces And its processing method.

A kind of nozzle assembly of Pneumatic dental sand blasting unit, including shell, gas pipeline, waterpipe and nozzle, flue Road and waterpipe are fixed with nozzle respectively；Shell one end is connect with nozzle, the other end is connector portions；Shell has the water inlet of waterpipe Mouthful.

Nozzle assembly and cylinder block set are tightly connected the sand-blasting machine to be formed and can be worked by connector portions.Nozzle assembly and body group After part connection, cavity or space phase that the waterpipe water jet of cylinder block set and the waterpipe water inlet of nozzle assembly pass through sealing Even, to realize that water flow is transported to nozzle assembly from cylinder block set, is sprayed again by nozzle.Nozzle assembly and cylinder block set sealing connect After connecing, the gas pipeline of the gas pipeline of cylinder block set and nozzle assembly is tightly connected, and powder-air mixture is from cylinder block set It is transported to nozzle assembly, sprayed again by nozzle.In nozzle including puff prot, water out is except puff prot.

Shell

As a preferred option, shell and the detachable cooperation of nozzle, gas pipeline have thread segment, and shell has gear Plate, gas pipeline pass through baffle and are locked, the combination locking nozzle and shell of gas pipeline and shell.

As a preferred option: shell includes shell and internal frame, and internal frame is within shell；Internal frame one end is connector portions, separately One end is baffle, and gas pipeline passes through the other end of internal frame and is locked, and nozzle, shell are locked in the combination of gas pipeline and internal frame And internal frame.The connecting pin that the gas pipeline of nozzle assembly passes through internal frame is used to be connected to the gas pipeline of cylinder block set.It is shell, interior Frame and nozzle are three independent components, and while locking between gas pipeline and internal frame, internal frame, shell and nozzle be incorporated in Together.

As a preferred option, internal frame includes stack shell, and the first end of stack shell is arranged connector portions, and opposite with first end second Section has baffle, and baffle has the through-hole for allowing gas pipeline to pass through.

Preferably, locking member, locking member and gas pipeline tight fit are inside provided with.Preferably, such as locking member and flue Road is locked by inclined-plane, key cooperates etc..

Preferably, nozzle assembly has locking member, and locking member resists the baffle of internal frame, and locking member and gas pipeline pass through spiral shell Line pair is fastenedly connected or locking member and gas pipeline tight fit；Gas pipeline has the connecting pin for exposing locking member.This lock Tight part is independently of the part of internal frame, when assembly, after gas pipeline is passed through internal frame baffle, with locking member and gas pipeline phase Connect, when locking member pushes against internal frame, illustrates that locking member is connect in place with gas pipeline.Preferably, locking member is nut, flue Thread segment is set on road.Nut is engaged with thread segment.Internal frame and gas pipeline are locked with locking member, thus by nozzle, shell and interior Frame is combined into nozzle assembly, as long as nozzle assembly when assembled unclamps locking member and the disassembly to nozzle assembly can be realized, is convenient for Maintenance and renewal part.

As a preferred option, the water inlet of waterpipe is set to internal frame, there is sealing ring between internal frame and waterpipe.Waterpipe Bent to avoid internal frame, waterpipe some between internal frame and shell, sealing ring is in addition to preventing water from entering internal frame Positioning action, one end of fixed waterpipe water inlet are also played to waterpipe in region between shell.Preferably, internal frame Stack shell has the receiving portion for accommodating waterpipe, and receiving portion is the notch for being opened in stack shell surface or receiving portion is to be opened in cylinder Hole with it, receiving portion are connected to water inlet.Receiving portion plays position-limiting action to waterpipe, finally by the fixed waterpipe of sealing ring Water inlet end.

As a preferred option, the outer surface of internal frame is equipped with first step, and the inner surface of shell is equipped with and first step The second step matched；Second step is with respect to first step close to nozzle.With the combination of locking member and gas pipeline, first step Shell is moved to the direction close to nozzle against second step.Preferably, first step and second step are the platform of annular Rank.

Preferably, positioning floor is equipped in shell, positioning floor is contacted with internal frame, position floor and first step have away from From.When internal frame, shell and nozzle combine completion, positioning floor and the mutual jam-packed of internal frame avoid internal frame, gas pipeline and water pipe It shakes in road.Preferably, positioning floor has multiple, and multiple positioning floors are uniformly arranged along interior frame peripheral.Preferably, the stack shell of internal frame Cylindrical, the face that positioning floor is contacted with internal frame is arc-shaped.To increase internal frame and position the contact area of floor, improve The stability of internal frame positioning.

As preferred mode, shell and nozzle are respectively dismountable individual components.In this way, shell, internal frame and nozzle It is independent part respectively, can replace respectively, easy to repair and renewal part, and part can manufacture respectively, single part Structure simplify, reduce manufacturing cost.

Preferably, shell one end resists nozzle, is equipped between shell and the faying face of nozzle and prevents shell and nozzle mutual The locating part of rotation.After shell is in conjunction with nozzle as a result, without rotation displacement between shell and nozzle, the steady of nozzle assembly is kept It is qualitative.

Another preferred mode, shell is fixedly connected with nozzle or shell is integrated with nozzle.Shell and nozzle are solid The process of fixed or integration, assembly simplifies, and the high reliablity that shell is connect with nozzle.

Circlip

When nozzle assembly and cylinder block set combine, there is a C-shaped clamp spring between nozzle assembly and cylinder block set, utilize circlip The clamping of deformation realization nozzle assembly and cylinder block set.

As a preferred option, the circlip of C-shaped is equipped between nozzle assembly and cylinder block set, two ends of circlip are blunt Change.Such as end is spherical, cambered surface, chamfering, is all the end of passivation.

Preferably, circlip is mounted in the connector portions of internal frame.The matched jump-ring slot of circlip is set on cylinder block set.

Preferably, each end of circlip is in inclined-plane respectively, and inclined-plane is towards cylinder block set.Inclined-plane is towards cylinder block set, tiltedly The inner ring of face and circlip is in obtuse angle.Using diameter it is small as inner ring, diameter it is big be used as outer ring.Reduce circlip and body group in inclined-plane Abrasion between part.

Preferably, the edge on inclined-plane is smooth curved surface.When the both ends of circlip are the smooth surfaces such as bulb, cambered surface, circlip Without cutting between cylinder block set, therefore when nozzle assembly and cylinder block set socket connection, circlip and body group can be avoided Part is mutually worn.

Nozzle

Water and air mixture is sprayed from nozzle, and nozzle is connected with waterpipe and gas pipeline respectively, and nozzle and shell are solid It is fixed.

As a preferred option, nozzle includes ontology and blast tube, and nozzle is connected with waterpipe, gas pipeline respectively, spray Mouth has a water spray channel and jet channel, including jet channel, sprays water channel except jet channel；Ontology and blast tube close-fitting It closes, has water spray channel in blast tube, have water entering section and water guide sector between blast tube and ontology, water entering section is connected to be formed with water guide sector Water spray channel.Blast tube except into water spray channel in addition to region be bonded with ontology, water can only from spray water channel outlet it is outside It sprays, realizes fixed point, uniformly water outlet, improve the strength that water sprays outward.

Preferably, water guide sector has multiple, outlet of the outlet of water guide sector as water spray channel, and the outlet of multiple water guide sectors is equal It is distributed in around jet channel evenly.

Preferably, the ontology of nozzle has water pipe interface channel and tracheae interface channel, water pipe interface channel and waterpipe Fixed, tracheae interface channel is fixed with gas pipeline.

Preferably, the ontology of nozzle has blast tube mounting hole, and blast tube is inserted into blast tube mounting hole, blast tube and sheet Body tight fit.

Preferably, the ontology of nozzle is by MIM injection molding, and it is logical that when injection molding then forms water pipe interface channel, tracheae connection Road and steel pipe accommodating chamber.After the MIM injection molding for completing ontology, then with laser welding waterpipe is connected with water pipe interface channel, use Gas pipeline is connected by laser welding with tracheae interface channel, and blast tube is pressed into steel pipe accommodating chamber, blast tube and ontology mistake It is full of cooperation.

In further embodiments, nozzle has connector, and there is connector air pipe interface, waterpipe jointing and blast tube to connect Mouthful, respectively with blast tube orifice, the interconnecting piece of air pipe interface and nozzle interface tube connects with water pipe for air pipe interface, waterpipe jointing The interconnecting piece of mouth and nozzle interface tube is staggered.

When making nozzle, blast tube is fixed in nozzle interface tube, has air inlet between blast tube and nozzle interface tube And water entering section, air inlet connectivity trachea interface and jet channel, water entering section are connected to waterpipe jointing and water spray channel.Connector and water After the completion of pipeline, gas pipeline, blast tube connection, the injection molding of nozzle body, area of the blast tube in addition into water spray channel are carried out Domain is bonded with ontology, and water can only spray outward from water spray channel, realize fixed point, uniformly water outlet, improves the power that water sprays outward Amount.

In further embodiments, gas pipeline, waterpipe and blast tube are wrapped in the ontology of nozzle, and gas pipeline opens up There is mounting hole, blast tube is inserted into mounting hole, and gas pipeline is connected to jet channel；Waterpipe is equipped with the water spray through waterpipe Mouthful, blast tube passes through water jet and water jet is directed at water entering section.

When making nozzle, blast tube is inserted into the mounting hole of gas pipeline after the water jet of waterpipe, then will Nozzle carry out injection molding, blast tube except into water spray channel in addition to region be bonded with ontology, water can only from spray water channel to Fixed point, uniformly water outlet are realized in outer ejection, improve the strength that water sprays outward.

As a preferred option, nozzle has the extended segment being connected with shell, and positioning table is formed between extended segment and nozzle Rank.As long as occurring change in size between nozzle and extended segment, that is, it may occur in which positioning step.When shell resists positioning step, explanation Shell in conjunction with nozzle in place.

Preferably, locating part is set between extended segment and shell, and extended segment is inserted into shell, and locating part is to be mutually matched Protrusion and groove, protrusion be located at extended segment, groove and be located at shell, or protrusion is located at extended segment positioned at shell, groove.Protrusion It is when being inserted into groove, the rotational freedom of nozzle and shell is unified.

Preferably, protrusion is rectangular block, and groove is rectangular channel.

Preferably, locating part has multiple, and multiple locating parts are uniformly distributed between shell and extended segment.

Blast tube

The mixture of powder and air is sprayed from the inner cavity of blast tube, and water flow sprays between blast tube and nozzle.

As a preferred option, blast tube is in hollow cylindrical shape, and blast tube is equipped with air inlet, water entering section and water guide sector, Air inlet is communicated with the inner cavity of blast tube, and water entering section is isolated with water guide sector with the inner cavity of blast tube, water entering section be located at waterpipe and Between water guide sector；Puff prot of the chamber exit of blast tube as nozzle, water jet of the outlet of water guide sector as nozzle.Work as spray After the body fits of mouth pipe and nozzle, the body fits formation water spray channel of water entering section and water guide sector with nozzle, water entering section conduct The entrance in water spray channel.

Tube body is divided into tracheae linkage section and water diversion section by water entering section, and air inlet is located at tracheae linkage section, and water guide sector is located at Water diversion section.

Preferably, water guide sector is arranged along the axial direction of blast tube, and there be multiple, circumference of multiple water guide sectors along blast tube in water guide sector It is uniformly distributed.Part of the water diversion section in addition to water guide sector is contacted with nozzle, and water flow concentration sprays outward from water guide sector, improves water Flow the strength of injection, and the ejection of uniform fixed point.

Preferably, water guide sector is the groove for being opened in nozzle pipe surface.The cross sectional shape of water guide sector be rectangle, semicircle, Arc, V-arrangement, U-shaped, L shape, trapezoidal etc..

Alternatively, water guide sector is located at water diversion section, water diversion section is in prismatic, and the side of water diversion section is as water guide sector, water Diversion section and the outer inscribed of blast tube.Preferably, water diversion section is regular prism.Preferably, the rib of water diversion section is fillet.Prism The water diversion section of formula is easy to process, and single-point water yield is stablized, and water yield is big.Preferably, blast tube is the cylinder of equal outer diameters, into Water portion is the circle concave ring for being opened in nozzle tube outer surface.Preferably, the end setting tool of water diversion section has extended segment, and extended segment is Cylindrical annular, extended segment are less than tube body.It therefore, is ring gap between extended segment and nozzle, water flows through water guide sector fixed point outflow Afterwards, cyclization is converged at extended segment.Nozzle when in use, the water flow of all diversion trenches pool it is a branch of after eject.Extended segment Length can't consume the dynamics of water flow injection, and water flow can be made to pool a branch of injection.

Preferably, the steel pipe interface channel of the tube body of blast tube and connector is interference fitted, tracheae linkage section and water entering section In connector, water diversion section has part to expose to connector.

Gas pipeline

The gas pipeline of nozzle assembly is connected with the gas pipeline of cylinder block set, forms conveying powder-air mixture Pipeline.

Preferably, gas pipeline one end is fixed with nozzle, and the other end is the linkage section for being connected with cylinder block set, gas There is the tight lock part fastened with shell, tight lock part is adjacent with linkage section on pipeline.

Preferably, tight lock part is external screw thread.Shell is built into nut, nut engages with tight lock part, reach gas pipeline with The purpose of shell locking.

Preferably, gas pipeline includes tube body and connector, and connector is fixed with tube body, and tight lock part and linkage section are set to and connect Connector.It is combined into gas pipeline with connector and tube body, then tube body can still use existing gas pipeline, it is only necessary to connect It is processed tight lock part (such as external threading) on head, reduces manufacturing cost.

Preferably, the tight lock part of connector is expanded with respect to linkage section.In this way, one can be formed between linkage section and locking section A limited step.Limited step can be inclined-plane.It when linkage section and cylinder block set cooperate, arrives at limited step, passes through inclined-plane reality Now lock.

Anticlogging sand-blasting machine

Sand-blasting machine, including cylinder block set and nozzle assembly, nozzle assembly and cylinder block set have respective gas pipeline respectively, Sealing drum is set between the gas pipeline of nozzle assembly and the gas pipeline of cylinder block set, sealing drum respectively with two gas pipelines It is tightly connected, having the common connection type of gap cylinder block set and nozzle assembly between two gas pipelines is that plug-in type connects It connects.

The gas pipeline and sealing drum of nozzle assembly are tightly connected, and the gas pipeline of cylinder block set also connects with the sealing drum It connects, sealing drum is connected to two gas pipelines as middle chamber.Sealing drum is in the cast of both ends open, the both ends difference of sealing drum Equipped with the interconnecting piece with two gas pipeline sealing cooperations.As a preferred option, the gas pipeline of nozzle assembly and body group There is adapter cavity between the gas pipeline of part, adapter cavity is the inner cavity of sealing drum.The outlet of adapter cavity and the flue of nozzle assembly Road linking, the entrance of adapter cavity are connected with the gas pipeline of cylinder block set.So-called linking refers to gas of the air-flow from cylinder block set When body pipeline enters adapter cavity, adapter cavity it is unobstructed to air-flow, when air-flow enters the gas pipeline of nozzle assembly from adapter cavity, spray The gas pipeline of nozzle assembly stops air-flow object.

As a preferred option, the both ends of sealing drum are respectively equipped with the interconnecting piece with two gas pipeline sealing cooperations, In an interconnecting piece be fixing end interconnecting piece, another interconnecting piece is inserted terminal interconnecting piece, and fixing end interconnecting piece has groove, with The connected gas pipeline of fixing end interconnecting piece is equipped with the protrusion that can be embedded in groove；Inserted terminal interconnecting piece is and another gas The chamber of pipeline tight fit.

Preferably, the outer end of inserted terminal interconnecting piece is equipped with guiding surface.

Preferably, sealing drum is tube body made of the wear resistant elastic materials such as silicone tube, emulsion tube or rubber tube.

Preferably, fixing end interconnecting piece is connected with the gas pipeline of cylinder block set, has on cylinder block set by sealing drum packet Protective shell in it；Inserted terminal interconnecting piece is connected with the gas pipeline of nozzle assembly.Protective shell and gas pipeline are by sealing drum Between being clipped in, it is not only flexible to realize sealed connection in the gas pipeline plug-in type with nozzle assembly to make sealing drum, but also have rigidity To avoid connection failure caused by sealing drum deformation.

Preferably, inserted terminal interconnecting piece is equipped with guiding surface.Guiding surface is matched with above-mentioned limited step, works as gas When pipeline is inserted in place, limited step and guiding surface close to.The contact area on two inclined-planes increases, then the reliability sealed mentions It rises.

Alternatively, fixing end interconnecting piece is connected with the gas pipeline of nozzle assembly, the gas of inserted terminal interconnecting piece and cylinder block set Body pipeline is connected.

Sand-blasting machine

In use, nozzle assembly and cylinder block set are required to freely relatively rotate sand-blasting machine, therefore, nozzle The connector portions of component and the connector portions of cylinder block set must satisfy concentricity requirement after mounting, just can guarantee the smooth of rotation Degree.

Pneumatic dental sand-blasting machine, including nozzle assembly and cylinder block set, cylinder block set have step, have on nozzle assembly With the mating surface of step cooperation；Step or step surface are plastic parts.

As a preferred option, step has multiple, and step is concentric；The corresponding mating surface of each step.Preferably, step There are two.The cooperation of two concentric step support nozzle assemblies and cylinder block set, using the circle center line connecting of two steps as axis, spray Nozzle assembly and or cylinder block set axial rotation.To guarantee during the work time, the sand chamber of cylinder block set always upward, air Mixture of powders being capable of smooth delivery of power.

As a preferred option, cylinder block set is equipped with the sealing ring for sealing water flow, and sealing ring is located at two with one heart Between step.That is, two concentric steps have certain span, increase the concentric fit area of cylinder block set and nozzle assembly Domain.

As a preferred option, step is type conical bench, and mating surface is slope.

As a preferred option, the mating surface of nozzle assembly is set to the connector portions of nozzle assembly, and the step of cylinder block set is set In the connector portions of cylinder block set, the connector portions of nozzle assembly are plastic part, the metal that the connector portions of cylinder block set are integrally formed Part.The joint area of nozzle assembly above-mentioned is in internal frame, and internal frame and shell are independent, and internal frame can be plastic part, therefore connector portions For plastic part.At this point, the connector portions of cylinder block set only need to be integrally formed out two concentric steps.It is integrally formed out two The mode of concentric steps, two direct concentricitys of step are reliable and easy to process.

Alternatively, the mating surface of nozzle assembly is metalwork, the step of cylinder block set is plastic part.Preferably, cylinder block set Joint body and Plastibell including metal, each Plastibell form a step, and Plastibell is fixed with joint body. Plastibell is fixed on joint body to be interference fitted, be bonded, in a manner of thermoplastic or injection molding etc..

When the connector portions of nozzle assembly and the connector portions of cylinder block set are all metalworks, to avoid metal covering from directly contacting and There is sharp wear, in connector portions two Plastibells of setting of cylinder block set, the connector portions of Plastibell and nozzle assembly are connect Touching, region of the cylinder block set connector portions in addition to Plastibell and nozzle assembly connector portions have gap.In this way, avoiding two metals It directly wears and concentricity is caused to increase in face.

The sand chamber of sand-blasting machine

As a preferred option, most greatly markings of powder amount are equipped in the sand chamber of sand-blasting machine.Most greatly powder amount markings It can indicate maximum of the client when adding powder.

As a preferred option, there are pressurized air delivery pipe and gas pipeline in sand chamber, pressurized air conveyance conduit 14 has Venthole has air powdering inlet on gas pipeline；Markings are lower than venthole and air-powder entrance.It avoids adding powder because of client Cause powder (emery dust) to enter pressurized air conveyance conduit 14 and gas pipeline too much, stifled sand occurs.

Preferably, the inner surface of sand chamber is spherical in shape.

Preferably, the cylinder block set of sand-blasting machine is equipped with the mounting portion of sand chamber, and sand chamber is embedded in and is fixed on mounting portion, sand chamber tool There is the top margin for being higher by mounting portion；Sand-blasting machine has sand chamber lid, and mounting portion has the interconnecting piece cooperated with sand chamber lid, and sand chamber lid has Sealing ring.After sand chamber lid is connect in place with mounting portion, sealing ring is pressed between sand chamber lid and top margin.The top margin of sand chamber is high Mounting portion out avoids the powder in sand chamber from falling into the gap of sand chamber and mounting portion junction.

Preferably, the air-powder entrance of the venthole of pressurized air conveyance conduit 14 and gas pipeline is lower than the top of sand chamber Side.Venthole and air-powder entrance are located within sand chamber, are conducive to pressurized air for all powder (or the sand in sand chamber Powder) dispersed, the powder loaded every time can be used up, and that improves the interior prepackage powder of sand chamber uses up rate.

Preferably, sand chamber has outwardly extending outer annular edge, and mounting portion is in the region that outer annular edge covers.In this way, sand chamber It is completely covered by the junction between drop chamber and mounting portion, when adding powder, powder will not fall into the company between sand chamber and mounting portion Connect region.Preferably, mounting portion is connected with sand chamber lid by screw thread pair.

Preferably, sand chamber lid has transparent form.Markings are in the visual range of form.

Utility model has the advantages that 1, shell, internal frame and nozzle are three mutually independent parts, difference can be used Material manufactures respectively, reduces manufacturing cost.2, internal frame can be made of plastic material, then connector portions are also plastic part, nozzle sets The adapter of plastic portion of part and the cylinder block set plug-in of metal connect, and using the self-lubricating and wearability of plastic material, reduce spray Abrasion between nozzle assembly and cylinder block set.3, pass through Passivation Treatment circlip using end, avoid or mitigate circlip and body group What the abrasion between part, nozzle assembly, extension cylinder block set and nozzle assembly precision combined uses the time.5, nozzle passes through water guide Portion makes the uniform fluid flow sprayed and strength is concentrated to water flow directional stream-guidance.6, in the gas pipeline of cylinder block set and nozzle assembly Gas pipeline between sealing drum is set, be tightly connected respectively with two gas pipelines with sealing drum, two gas pipelines are not straight It contacts, without abrasion between gas pipeline；It is flexible piece that gas pipeline, which is rigid member, sealing drum, and sealing drum wearability is good, is not easy Deformation improves the grafting number of nozzle assembly and cylinder block set；Extend the service life of sand-blasting machine, ensures not sand leakage, not stifled sand. 7, cylinder block set and nozzle assembly are cooperated by concentric step, opposite turn that cylinder block set and nozzle assembly can be smooth It is dynamic.

Detailed description of the invention

Fig. 1 is the schematic diagram of nozzle assembly.

Fig. 2 is the cross-sectional view of Fig. 1.

Fig. 3 is the schematic diagram of internal frame.

Fig. 4 is the position view of water export on cylinder block set.

Fig. 5 is the schematic diagram of shell, wherein (a) is the main view of shell, is (b) the A-A cross-sectional view of (a), is (c) one Shell under visual angle (d) is shell under another visual angle.

Fig. 6 is the perspective view of nozzle.

Fig. 7 is a kind of cross-sectional view of nozzle.

Fig. 8 is the cross-sectional view of second of nozzle with connector.

Fig. 9 is the cross-sectional view of the third nozzle.

Figure 10 is the schematic diagram of blast tube, wherein (a) is a kind of blast tube schematic diagram of structure, it is (b) second of structure Blast tube schematic diagram, (c) be the third structure blast tube schematic diagram.

Figure 11 is the schematic diagram of circlip.

Figure 12 is that the water flow jet comparison diagram of nozzle is (b) wherein (a) is the water flow jet figure of the nozzle of the prior art The water flow jet figure of the nozzle of the utility model.

Figure 13 is the schematic diagram of gas pipeline.

Figure 14 is the schematic diagram of the connector of gas pipeline.

Figure 15 is the schematic diagram of waterpipe.

Figure 16 is the schematic diagram of nut.

Figure 17 is the schematic diagram that the gas pipeline of cylinder block set is connected with the gas pipeline of nozzle assembly.

Figure 18 is the cross-sectional view of sealing drum.

Figure 19 is the portion the K enlarged drawing of Figure 17.

Figure 20 is the schematic diagram of sand chamber.

Detailed description and specific embodiment

In conjunction with attached drawing, the utility model is described below:

Dentistry sand-blasting machine is mixed with the abrasive powder jet stream of air and water by one to carry out dental procedure, dentistry spray Sand machine includes cylinder block set and nozzle assembly, cylinder block set and nozzle assembly socket connection.

Nozzle assembly

In some embodiments, as depicted in figs. 1 and 2, a kind of nozzle assembly of Pneumatic dental sand blasting unit, including shell 1, gas pipeline 2, waterpipe 3 and nozzle 4, gas pipeline 2 and waterpipe 3 are fixed with nozzle 4 respectively；1 one end of shell and nozzle 4 Connection, the other end are connector portions；Shell 1 has the water inlet 301 of waterpipe 3.

Nozzle assembly and cylinder block set are tightly connected the sand-blasting machine to be formed and can be worked by connector portions.Nozzle assembly and body group Part connection after, the waterpipe water outlet 12(of cylinder block set is as shown in Figure 4) and nozzle assembly waterpipe water inlet 301(as figure Shown in 1- Fig. 3) by sealing cavity or space be connected, thus realize water flow from cylinder block set be transported to nozzle assembly, again by Nozzle sprays.After nozzle assembly and cylinder block set are tightly connected, the gas pipeline of cylinder block set and the gas pipeline 2 of nozzle assembly It is tightly connected, powder-air mixture is transported to nozzle assembly from cylinder block set, is sprayed again by nozzle.Puff prot exists in nozzle 4 Interior, water out is except puff prot.

Shell

Shell forms the appearance of nozzle assembly, and in sand-blasting machine, nozzle is arranged in shell one end, and the other end connects cylinder block set, When in use, doctor holds shell to sand-blasting machine.Shell and nozzle are directly contacted with human oral cavity, it is desirable that accomplish one machine of a people, because After this each use, shell and nozzle require to carry out sterilization.

In some embodiments, as shown in Fig. 2, shell 1 and the detachable cooperation of nozzle 4, shell 1 have baffle, gas Pipeline 2 passes through baffle and is locked, the combination locking nozzle 4 and shell 1 of gas pipeline 2 and shell 1.

In some embodiments, as shown in Figure 3 and Figure 5, shell 1 includes shell 101 and internal frame 102, and internal frame 102 is in shell Within 101；Connector portions are set to one end of internal frame 102, and gas pipeline 2 passes through the other end of internal frame 102 and is locked, gas pipeline 2 and internal frame 102 combination locking nozzle 4, shell 101 and internal frame 102.The gas pipeline of nozzle assembly passes through the connecting pin of internal frame For the gas pipeline connection with cylinder block set.Shell 101, internal frame 102 and nozzle 4 are three independent components, in flue While locking between road and internal frame, internal frame 102, shell 101 and nozzle 4 are combined together.

In some embodiments, through hole is equipped with locking member, locking member and gas pipeline tight fit；Or through-hole and gas Pipeline interference fit.Such as locking member and gas pipeline are cooperated by inclined-plane locking, key.Alternatively, as shown in Fig. 2 and Figure 16, spray Nozzle assembly has locking member 7, and locking member 7, which resists the baffle 1022 of internal frame, locking member 7 and gas pipeline and fastened by screw thread pair, to be connected It connects or locking member 7 and gas pipeline tight fit；Gas pipeline has the connecting pin for exposing locking member 7.This locking member 7 is Independently of the part of internal frame, when assembly, after gas pipeline is passed through internal frame baffle, it is connected with locking member 7 with gas pipeline, works as lock When tight part 7 pushes against internal frame, illustrate that locking member 7 is connect in place with gas pipeline.Locking member 7 is nut, sets screw thread on gas pipeline Section.Nut is engaged with thread segment.

With locking member and gas acting pipe locking shell and nozzle assembly method, make shell, internal frame and nozzle respectively It is made of different materials.Such as: nozzle, PEAK and or PPSU high temperature resistant sterile material system are made with the metal injection molded mode of MIM Make shell and internal frame.Nozzle assembly requires the sterilization treatment that carries out disinfection after each, using PAEK and PPSU high temperature resistant The shell and internal frame that sterile material is done are being heated to 200-500 times it is possible that damaged, rupture, and the nozzle of MIM injection molding exists Substantially be not in damage under high-temperature sterilization, therefore, using the assembly method of locking, when shell and or internal frame damage when, Damaged components are only needed replacing, nozzle still can continue to use, and reduce the use cost being used for.

By the way of being interference fitted with gas pipeline, manufacturing cost saving and easy for installation, but in autoclaving process In will cause shell internal stress variation and cause to crack.By the way of nut fastening, nut and thread segment are nibbled by screw thread pair It closes, without internal stress, the rupture of shell can be reduced, extend the service life of nozzle assembly.

Internal frame

Internal frame is used to compress shell to the direction of nozzle, cooperates with gas pipeline to lock nozzle and shell, and hold Receive waterpipe.

In some embodiments, as shown in figure 3, internal frame 102 includes stack shell, connector portions 1021 are arranged in the first end of stack shell, Baffle is arranged in second end 1022, and baffle has the through-hole 1024 for allowing gas pipeline 2 to pass through.In some embodiments, such as Fig. 3 and Shown in Fig. 5, the outer surface of internal frame 102 is equipped with first step 1023, and the inner surface of shell is equipped with matched with first step 1023 Second step 1012；Second step 1012 is with respect to first step 1023 close to nozzle 4.With the knot of locking member 7 and gas pipeline It closes, first step 1023 moves shell to the direction close to nozzle 4 against second step 1012.First step 1023 and second Step 1012 is the step of annular.

In some embodiments, as shown in figure 17, the water inlet 301 of waterpipe 3 is set to internal frame 102, internal frame 102 and water pipe There is sealing ring 8 between road 3.As shown in figure 15, waterpipe 3 bends to avoid internal frame 102, waterpipe 3 some be located at Between internal frame 102 and shell 1, sealing ring 8 is in addition to preventing water from entering the region between internal frame 102 and shell 1, also to waterpipe 3 Play positioning action, one end of fixed 3 water inlet of waterpipe.As shown in figure 3, the stack shell of internal frame 102, which has, accommodates waterpipe Receiving portion 1025, receiving portion 1025 is the notch for being opened in stack shell surface or receiving portion 1025 is the hole being opened on stack shell, Receiving portion 1025 is connected to water inlet.Receiving portion 1025 plays position-limiting action to waterpipe, finally by the fixed waterpipe of sealing ring 8 Water inlet end, as shown in figure 17, sealing ring 8 is arranged in the water inlet end of waterpipe.

Shell

Shell forms the appearance of nozzle assembly, and shell positions internal frame and nozzle.

In some embodiments, as shown in Fig. 2, 1 one end of shell resists nozzle 4, between shell 1 and the faying face of nozzle 4 Equipped with the locating part for preventing shell 1 and nozzle 4 from mutually rotating.After shell 1 is combined with nozzle 4 as a result, between shell 1 and nozzle 4 Without rotation displacement, the stability of nozzle assembly is kept.As shown in Fig. 5 (d) and Fig. 6, convex block 1013 is set in shell 101, is being sprayed Mouth 4 is arranged with the matched groove 4032 of convex block 1013, and convex block 1013 limits between shell 101 and nozzle 4 in groove 4032 Rotational freedom.

In some embodiments, as shown in figure 5, being equipped with positioning floor 1011 in shell 101, floor 1011 and internal frame are positioned 102 contacts, positioning floor 1011 and first step 1012 have distance.When internal frame 102, shell 101 and nozzle 4 combine completion, Floor 1011 and the mutual jam-packed of internal frame 102 are positioned, internal frame 102, gas pipeline 2 and waterpipe 3 is avoided to shake.Position floor 1011 Have multiple, multiple positioning floors 1011 are uniformly arranged along interior frame peripheral.The stack shell of internal frame 102 is cylindrical, positions floor 1011 The face contacted with stack shell is arc-shaped.To increase internal frame 102 and position the contact area of floor 1011, it is fixed to improve internal frame 102 The stability of position.

Nozzle

Water and air mixture is sprayed from nozzle, and nozzle is connected with waterpipe and gas pipeline respectively, and nozzle and shell are solid It is fixed.

In some embodiments, as shown in figs, nozzle has water spray channel A and jet channel B, jet channel B Inside, water spray channel A is except jet channel B；Water spray channel A, which is connected to by water entering section 4022 with water guide sector 4023, to be formed, water guide There is multiple, outlet of the outlet of each water guide sector 4023 as the channel A that sprays water in portion 4023.

As shown in Fig. 7, Fig. 8 and Figure 10, nozzle 4 include ontology 401 and blast tube 402, nozzle respectively with waterpipe 3, gas Body pipeline 2 is connected, and including nozzle 4 has water spray channel A and jet channel B, jet channel B, the channel A that sprays water is in jet channel B Except；Ontology 401 and 402 tight fit of blast tube have water spray channel A in blast tube, have between blast tube 402 and ontology 401 into Water portion 4022 and water guide sector 4023, water entering section 4022 are connected to formation water spray channel A with water guide sector 4023.

Water guide sector 4023 has multiple, and the outlet of multiple water guide sectors 4023 is distributed evenly in around jet channel B.Blast tube 4 region in addition into water spray channel A is bonded with ontology, and water can only spray outward from water spray channel A, is realized and is pinpointed, uniformly Water outlet improves the strength that water sprays outward, focuses the spray regime of water flow and sand particle, improves the efficiency of cleaning tooth.Cleaning Efficiency improves, and natural blast time will shorten, and the loss of emery dust will reduce.

As shown in fig. 7, the ontology 401 of nozzle has water pipe interface channel 4012 and tracheae interface channel 4011, water pipe connects It connects road 4012 and waterpipe 3 is fixed, tracheae interface channel 4011 and gas pipeline 2 are fixed.The ontology 401 of nozzle has nozzle Pipe mounting hole 4013, blast tube 402 are inserted into blast tube mounting hole 4013, blast tube 402 and 401 tight fit of ontology.Such as Fig. 6 institute Show, nozzle has the extended segment 403 being connected with shell, and positioning step 4031 is formed between extended segment 403 and ontology 401.As long as Occur change in size between ontology 401 and extended segment 401, that is, may occur in which positioning step 4031.Shell 101 resists positioning step When 4031, illustrate that shell 101 is combined in place with nozzle 4.

As shown in Fig. 5 (d) and Fig. 6, locating part is set between extended segment and shell, and extended segment is inserted into shell, limit Part is the protrusion 1013 being mutually matched and groove 4032, and protrusion 4031 is located at that extended segment, groove is located at shell or protrusion is located at Shell, groove are located at extended segment.It is when in protrusion insertion groove, the rotational freedom of nozzle and shell is unified.Protrusion is rectangle Block, groove are rectangular channel.Locating part has multiple, and multiple locating parts are uniformly distributed between shell and extended segment.

In some embodiments, as shown in fig. 7, the ontology of nozzle is by MIM injection molding, when injection molding, then forms water pipe company Connect road 4012, tracheae interface channel 4011 and steel pipe accommodating chamber 4013.After the MIM injection molding for completing ontology, then use laser welding Waterpipe is connected with water pipe interface channel, gas pipeline is connected with tracheae interface channel with laser welding, by blast tube 402 It is pressed into steel pipe accommodating chamber 4013, blast tube 402 and ontology are interference fitted.

In further embodiments, as shown in figure 8, nozzle have connector 10, connector 10 have air pipe interface 1001, Waterpipe jointing 1002 and nozzle interface tube 1003, air pipe interface, waterpipe jointing respectively with blast tube orifice, air pipe interface with The interconnecting piece of nozzle interface tube is staggered with the interconnecting piece of waterpipe jointing and nozzle interface tube.

When making nozzle, blast tube 402 is fixed in nozzle interface tube 1003, and air inlet connectivity trachea interface and jet are logical Road B, water entering section 4022 are connected to waterpipe jointing and water spray channel A.Connector 10 has been connect with waterpipe, gas pipeline, blast tube Cheng Hou carries out the injection molding of nozzle body, and region of the blast tube in addition into water spray channel A is bonded with ontology, and water can only be from spray Aquaporin A sprays outward, realizes fixed point, uniformly water outlet, improves the strength that water sprays outward.

In further embodiments, as shown in Figure 10, gas pipeline, waterpipe and blast tube are fixed on the ontology of nozzle, Gas pipeline offers mounting hole, and blast tube is inserted into mounting hole, and gas pipeline is connected to jet channel B；Waterpipe, which is equipped with, to be run through The water jet of waterpipe, blast tube passes through water jet and water jet is directed at water entering section 4022.

When making nozzle, blast tube is inserted into the mounting hole of gas pipeline after the water jet of waterpipe, then will Nozzle carries out injection molding, and region of the blast tube in addition into water spray channel A is bonded with ontology, and water can only be from water spray channel A It sprays outward, realizes fixed point, uniformly water outlet, improve the strength that water sprays outward.

Blast tube

The mixture of powder and air is sprayed from the inner cavity of blast tube, and water flow sprays between blast tube and nozzle.

In some embodiments, as shown in Figure 10, blast tube 402 is in equal outer diameters and hollow cylindrical shape, blast tube 402 are set There are air inlet 4021, water entering section 4022 and water guide sector 4023, air inlet 4021 is communicated with the inner cavity of blast tube 402, water entering section 4022 are isolated with water guide sector 4023 with the inner cavity of blast tube 402, and water entering section 4022 is between waterpipe and water guide sector 4023；Spray Puff prot of the chamber exit of mouth pipe 402 as nozzle 4, water jet of the outlet of water guide sector 4023 as nozzle.

In some embodiments, as shown in Figure 10 (a) shows, the cross sectional shape of water guide sector is rectangle, semicircle, arc, V-arrangement, U Shape, L shape, trapezoidal etc..

As shown in Figure 10 (b), the end setting tool of water diversion section has extended segment 4024, and extended segment is cylinder, and extended segment is small In tube body.It therefore, is that ring gap converges at extended segment after water flows through water guide sector fixed point outflow between extended segment and nozzle Cyclization.Nozzle when in use, the water flow of all diversion trenches pool it is a branch of after eject.The length of extended segment can't consume water The dynamics projected is flowed, and water flow can be made to pool a branch of injection.

The tube body of blast tube and the steel pipe interface channel of connector are interference fitted, and tracheae linkage section and water entering section are located at connection In part, water diversion section has part to expose to connector.

As shown in Figure 10 (c), for water diversion section in prismatic, the side of water diversion section is used as water guide sector, water diversion section with spray The outer inscribed of mouth pipe.Water diversion section is regular prism；The rib of water diversion section is fillet.When in blast tube insertion nozzle body, lead The channel for allowing water stream channel to flow through is formed between water portion and ontology.The water diversion section of prism is easy to process, and single-point waterline Water yield it is big, cleaning efficiency is high.

Gas pipeline

The gas pipeline of nozzle assembly is connected with the gas pipeline of cylinder block set, forms conveying powder-air mixture Pipeline.In some embodiments, 2 one end of gas pipeline is fixed with nozzle, and the other end is the company for being connected with cylinder block set Section is connect, there is the tight lock part fastened with shell on gas pipeline, tight lock part is adjacent with linkage section.Tight lock part is external screw thread.Shell It is built into nut, nut engages with tight lock part, achievees the purpose that gas pipeline and shell are locked.Tight lock part can be with flue Road one.

In some embodiments, as shown in figure 13, gas pipeline 2 include tube body 201 and connector 202, connector 202 with Tube body 201 is fixed, and tight lock part 2021 and linkage section 2022 are set to connector 202.Gas is combined into connector 202 and tube body 201 Body pipeline 2, then tube body can still use existing gas pipeline, it is only necessary to process tight lock part on connector 202 and (such as attack outer Screw thread), reduce manufacturing cost.

As shown in figure 14, the tight lock part 2021 of connector 202 is expanded with respect to linkage section 2022.In this way, 2022 He of linkage section A limited step can be formed between locking section 2021.Limited step is in 2023 inclined-planes.When linkage section and cylinder block set cooperate, Limited step 2023 is realized by inclined-plane and is locked.

Circlip

When nozzle assembly and cylinder block set combine, there is a C-shaped clamp spring 9 between nozzle assembly and cylinder block set, utilize circlip 9 Deformation realize nozzle assembly and cylinder block set clamping.

In some embodiments, the circlip 9 of C-shaped is equipped between nozzle assembly and cylinder block set, two ends of circlip 9 are blunt Change.Such as end is spherical, cambered surface, chamfering, is all the end of passivation.

Circlip 9 is mounted in the connector portions of internal frame.The matched jump-ring slot of circlip 9 is set on cylinder block set.

As shown in figure 11, each end of circlip 9 is in inclined-plane respectively, and inclined-plane is towards cylinder block set.Inclined-plane is towards body group The inner ring of part, inclined-plane and circlip 9 is in obtuse angle.Using diameter it is small as inner ring, diameter it is big be used as outer ring.Reduce circlip 9 in inclined-plane Abrasion between cylinder block set.

The edge on inclined-plane is smooth curved surface.When the both ends of circlip 9 are the smooth surfaces such as bulb, cambered surface, circlip 9 and body Without cutting between component, therefore when nozzle assembly and cylinder block set socket connection, it is mutual with cylinder block set to can be avoided circlip 9 Abrasion.

Sealing drum

Component of the sealing drum 5 as the gas pipeline of connection and sealing nozzle assembly and the gas pipeline of cylinder block set, it is real The purpose of not stifled sand not sand leakage in existing air-powder mixture transmission process.Sealing drum 5 is fabricated from a flexible material, sealing drum 5 with Gas pipeline is tightly connected.For example, sealing drum 5 is silica gel cylinder, sealing drum 5 and gas pipeline 2 are tightly connected.Except sealing drum 5 There is connected with outer casing.Connected with outer casing plays support sealing drum, sealing drum is avoided to deform because of the grafting of cylinder block set and gas pipeline Cause sand leakage or stifled sand.

In some embodiments, as shown in figure 18, sealing drum 5 includes being located at the inserted terminal interconnecting piece 501 at both ends and fixing Hold interconnecting piece 502 and adapter cavity 503, adapter cavity 503 between inserted terminal interconnecting piece 501 and fixing end interconnecting piece 502, Inserted terminal interconnecting piece 501 is connected with the linkage section of the gas pipeline of nozzle assembly, and fixing end interconnecting piece 502 is used for cylinder block set Gas pipeline be connected.

Sealing drum 5 is tube body made of the wear resistant elastic materials such as silicone tube, emulsion tube or rubber tube.

That is, the gas pipeline of cylinder block set and the gas pipeline of nozzle assembly are not directly contacted with, but respectively at Sealing drum contact, sealing drum is made of flexible material, sealing drum there is good wearability and have good elastic deformation with Restore the ability of deformation, postpones sand leakage, stifled sand occurs.

Sealing drum is set between the gas pipeline of cylinder block set and the gas pipeline of nozzle assembly, with sealing drum respectively with Two gas pipelines are tightly connected, and two gas pipelines are not directly contacted with, without abrasion between gas pipeline；Gas pipeline is rigidity Part, sealing drum are flexible pieces, and sealing drum wearability is good, is unlikely to deform, and improve the grafting number of nozzle assembly and cylinder block set；Prolong The service life of long sand-blasting machine.

Sand-blasting machine is before use, nozzle assembly and cylinder block set are to slotting sealed connection, and water flow is from cylinder block set flow nozzle When component, in the waterpipe by the gap flow nozzle component between cylinder block set and nozzle assembly.Spray in the prior art Sand machine, the connection type of the gas pipeline of the gas pipeline and nozzle assembly of cylinder block set are two metal gas tube contacts, Sealing ring is set between two gas pipelines for sealing.But in long-term sandblasting procedures, emery dust will lead in sandblasting procedures Metal pipe-wall is damaged, and steam can enter the interconnecting piece of two gas pipelines between cylinder block set and nozzle assembly, lead to sand Powder agglomerates in gas pipeline, gas pipeline is caused to block.Herein, sealing drum both ends are separately connected two gas pipelines, and two It is not contacted between a gas pipeline, what emery dust was collided when through the junction of two gas pipelines is sealing drum, is equivalent to handle Impact to sealing drum is switched to the impact of metal gas pipeline.Realized by sealing drum the transition of sand particle from cylinder block set to Nozzle assembly, sealing drum is flexible, and emery dust is encountered sealing barrel and can be shot back in sandblasting procedures, without wearing sealing drum. The damaging problem of metal tube is solved, and the service life of such nozzle assembly just improves.Sealing drum not only plays sealing, isolation steam Effect, also act as impact of the caching emery dust to gas pipeline, emery dust made to smoothly transit to the work of nozzle assembly from cylinder block set With.

Concentric steps

In use, nozzle assembly and cylinder block set are required to freely relatively rotate sand-blasting machine, therefore, nozzle The connector portions of component and the connector portions of cylinder block set must satisfy concentricity requirement after mounting, just can guarantee the smooth of rotation Degree.

In some embodiments, the cylinder block set of Pneumatic dental sand-blasting machine has step C, has on nozzle assembly and step The mating surface D of C cooperation；Step C or the face step C are plastic parts.

There are two step C to contact simultaneously with corresponding mating surface D mating surface D, and two step C are concentric；Each step C is corresponding One mating surface D.The cooperation of two concentric step C support nozzle assemblies and cylinder block set, with the circle center line connecting of two step C For axis, nozzle assembly and or cylinder block set axial rotation.To guarantee during the work time, the sand chamber of cylinder block set court always On, air-powder mixture being capable of smooth delivery of power.

Cylinder block set is equipped with the sealing ring for sealing water flow, and sealing ring is located between two concentric steps C.Step C It is slope for type conical bench C, mating surface D.

In some embodiments, the mating surface D of nozzle assembly is set to the connector portions of nozzle assembly, the step C of cylinder block set Set on the connector portions of cylinder block set, the connector portions of nozzle assembly are plastic part, the gold that the connector portions of cylinder block set are integrally formed Belong to part.The joint area of nozzle assembly above-mentioned is in internal frame, and internal frame and shell are independent, and internal frame can be plastic part, therefore connector Portion is plastic part.At this point, the connector portions of cylinder block set only need to be integrally formed out two concentric steps C.It is integrally formed out The mode of two concentric steps C, two direct concentricitys of step C are reliable and easy to process.

Alternatively, in some embodiments, the mating surface D of nozzle assembly is metalwork, the step C of cylinder block set is plastics Part.Preferably, cylinder block set includes the joint body and Plastibell of metal, and each Plastibell forms a step C, plastics Lantern ring is fixed with joint body.Plastibell is fixed on joint body to be interference fitted, be bonded, in a manner of thermoplastic or injection molding etc..

When the connector portions of nozzle assembly and the connector portions of cylinder block set are all metalworks, to avoid metal covering from directly contacting and There is sharp wear, in connector portions two Plastibells of setting of cylinder block set, the connector portions of Plastibell and nozzle assembly are connect Touching, region of the cylinder block set connector portions in addition to Plastibell and nozzle assembly connector portions have gap.In this way, avoiding two metals It directly wears and concentricity is caused to increase in face.

Sand chamber

Sand chamber is in sand-blasting machine for storing the cavity of emery dust.The gas pipeline of pressurized air delivery pipe and cylinder block set is equal It is inserted into sand chamber, after pressurized air enters sand chamber, emery dust is dispersed to be formed air-powder mixture, and air-powder mixture enters In gas pipeline, emery dust is conveyed.

In some embodiments, as shown in figure 20, most greatly markings 131 of powder amount are equipped in the sand chamber 13 of sand-blasting machine. Most greatly powder amount markings can indicate maximum of the doctor when adding powder.There are pressurized air delivery pipe 14 and body in sand chamber The gas pipeline 15 of component, pressurized air conveyance conduit 14 have venthole, have air-powder on the gas pipeline 15 of cylinder block set Entrance；Markings 131 are lower than venthole and air-powder entrance.It avoids causing powder (emery dust) to enter because client adds powder too many There is stifled sand in pressurized air conveyance conduit 14 and gas pipeline.The inner surface of sand chamber is spherical in shape.

The cylinder block set of sand-blasting machine is equipped with the mounting portion 16 of sand chamber 13, and sand chamber 13 is embedded in and is fixed on mounting portion 16, sand chamber 13 have the top margin 132 for being higher by mounting portion 16；Sand-blasting machine is covered with sand chamber 13, and mounting portion 16 has the company with the lid cooperation of sand chamber 13 Socket part, the lid of sand chamber 13 have sealing ring.After the lid of sand chamber 13 is connect in place with mounting portion 16, sealing ring is pressed in the lid of sand chamber 13 Between top margin 132.The top margin 132 of sand chamber 13 is higher by mounting portion 16, and the powder in sand chamber 13 is avoided to fall into sand chamber 13 and installation In the gap of 16 junction of portion.

The venthole of pressurized air conveyance conduit 14 and the air-powder entrance of gas pipeline are lower than the top margin of sand chamber 13.Out Stomata and air-powder entrance are located within sand chamber 13, are conducive to pressurized air for all powder (or emery dust) in sand chamber 13 Dispersed, the powder loaded every time can be used up, and that improves the interior prepackage powder of sand chamber 13 uses up rate.

Sand chamber 13 has outwardly extending outer annular edge, and mounting portion 16 is in the region that outer annular edge covers.In this way, sand chamber 13 is complete Junction between complete hiding drop chamber 13 and mounting portion 16, when adding powder, powder will not fall into sand chamber 13 and mounting portion 16 it Between join domain.

Mounting portion 16 is covered with sand chamber 13 and is connected by screw thread pair.The lid of sand chamber 13 has transparent form.Markings are in form In visual range.

Dismountable nozzle assembly

In some embodiments, nozzle assembly includes shell 1, nozzle 4 and gas pipeline 2, nozzle 4 and gas pipeline 2 It is fixed；Shell 1 and the detachable cooperation of nozzle 4, gas pipeline 3 have thread segment, and shell 1 has baffle, and thread segment passes through gear Plate is simultaneously engaged with nut 7, and gas pipeline 2 and nut 7 lock shell 1 and nozzle 4.Thread segment 202 is set to connector, connector It is fixedly connected with gas pipeline 2.Connector is fixed on the end of gas pipeline 2, and connector has the company being connected to cylinder block set Connect section.

When nut 7 and thread segment 202 are locked in place, nut 7 offsets with baffle 1022.The internal diameter of through-hole is greater than thread segment 202 outer diameter, and through-hole is less than nut 7.The end that nut 7 and baffle 1022 offset is first end, is applied in the second end of nut 7 Power portion.Force section is flat recess or force section is stop surfaces.For example nut 7 is hex nut 7, then each side of nut 7 Face is all stop surfaces.For another example, there is a plane in the outer surface of nut 7, uses the sleeve of the external shape fits with nut 7, set Cylinder can make nut 7 that sleeve be followed to rotate by offseting with the plane of nut 7, then the plane of 7 outer surface of nut is stop surfaces. When assembly, internal frame 102 is first inserted into shell 101, while gas pipeline 2 is directed at through-hole；By the step C of internal frame 102 to shell 101 step C is pushed, and the thread segment 202 of gas pipeline 2 passes through through-hole；Nut 7 is rotated along thread segment 202, until internal frame 102 step C is mutually pushed against with the step C of shell 101.When needing to dismantle shell 101 and internal frame 102, nut 7 is unscrewed and is taken Out, i.e. separated casing 101 and internal frame 102, this 4 component of nozzle is easy to disassemble, easy to repair and replacement components.

Anticlogging sand-blasting machine

In some embodiments, anticlogging sand-blasting machine, cylinder block set and nozzle assembly including socket connection, nozzle Component and cylinder block set have respective gas pipeline respectively, and the gas pipeline of nozzle assembly and the gas pipeline of cylinder block set pass through Sealing drum connection.

As shown in figure 17, the gas pipeline 2 of nozzle assembly and sealing drum 6 are tightly connected, the gas pipeline 7 of cylinder block set It is connect with the sealing drum, sealing drum is connected to two gas pipelines as middle chamber.Sealing drum is in the cast of both ends open, sealing The both ends of cylinder are respectively equipped with the interconnecting piece with two gas pipeline sealing cooperations.

In some embodiments, there is adapter cavity 503 between the gas pipeline of nozzle assembly and the gas pipeline of cylinder block set, Adapter cavity 503 is the inner cavity of sealing drum.The outlet of adapter cavity 503 is connected with the gas pipeline of nozzle assembly, and adapter cavity 503 enters Mouth is connected with the gas pipeline of cylinder block set.So-called linking refers to that air-flow enters adapter cavity from the gas pipeline of cylinder block set When 503, adapter cavity 503 it is unobstructed to air-flow, air-flow from adapter cavity 503 enter nozzle assembly gas pipeline when, nozzle assembly Gas pipeline to air-flow object stop.

In some embodiments, as shown in figure 18, the both ends of sealing drum are respectively equipped with cooperates with two gas pipeline sealings Interconnecting piece, one of interconnecting piece is fixing end interconnecting piece 502, another interconnecting piece is inserted terminal interconnecting piece 501, fixing end Interconnecting piece 502 has groove, and the gas pipeline being connected with fixing end interconnecting piece 502 is equipped with the protrusion that can be embedded in groove；It inserts Connecing end interconnecting piece 501 is the chamber with another gas pipeline tight fit.

The outer end of inserted terminal interconnecting piece 501 is equipped with guiding surface.

In some embodiments, sealing drum is rubber tube or silica gel cylinder.

Fixing end interconnecting piece 502 is connected with the gas pipeline of cylinder block set, has on cylinder block set by sealing drum Bao Qi Interior protective shell；Inserted terminal interconnecting piece 501 is connected with the gas pipeline of nozzle assembly.Protective shell and gas pipeline will seal collet chuck Between, make sealing drum the gas pipeline plug-in type with nozzle assembly not only it is flexible with realize be tightly connected, but also have rigidity with Avoid connection failure caused by sealing drum deformation.

Inserted terminal interconnecting piece 501 is equipped with guiding surface.Guiding surface is matched with above-mentioned limited step C, works as flue When road is inserted in place, limited step C and guiding surface close to.The contact area on two inclined-planes increases, then the reliability sealed mentions It rises.

Preferable scheme is that being arranged sealing drum on cylinder block set.Because nozzle assembly requires a people one when in use Machine, that is, after guest's use that each sandblasting cleans one's teeth, need to carry out disinfection nozzle assembly.Sealing drum setting is existed On cylinder block set, sealing drum will not limit to the applicable disinfection way of nozzle assembly.Also, high temperature, height are not carried out to sealing drum The disinfection such as pressure, ultraviolet light, is able to extend the service life of sealing drum, ensure sand-blasting machine be used for a long time in not sand leakage, do not block up sand.

Certainly, sealing drum is arranged on nozzle assembly is also optinal plan, only with the disinfection side for selecting sealing drum applicable Formula.In some embodiments, fixing end interconnecting piece 502 is connected with the gas pipeline of nozzle assembly, inserted terminal interconnecting piece 501 It is connected with the gas pipeline of cylinder block set.

Pneumatic dental sand-blasting machine

In use, nozzle assembly and cylinder block set are required to freely relatively rotate sand-blasting machine, therefore, nozzle The connector portions of component and the connector portions of cylinder block set must satisfy concentricity requirement after mounting, just can guarantee the smooth of rotation Degree.

As shown in fig. 16 and fig. 19, Pneumatic dental sand-blasting machine, including nozzle assembly and cylinder block set, cylinder block set have platform Rank C has the mating surface D cooperated with step C on nozzle assembly；Step C or the face step C are plastic parts.

There are two step C to contact simultaneously with corresponding mating surface D mating surface D, and two step C are concentric；Each step C is corresponding One mating surface D.The cooperation of two concentric step C support nozzle assemblies and cylinder block set, with the circle center line connecting of two step C For axis, nozzle assembly and or cylinder block set axial rotation.To guarantee that the sand chamber 13 of cylinder block set is always during the work time Upward, air-powder mixture being capable of smooth delivery of power.

Cylinder block set is equipped with the sealing ring for sealing water flow, and sealing ring is located between two concentric steps C.Step C It is slope for type conical bench C, mating surface D.

In some embodiments, the mating surface D of nozzle assembly is set to the connector portions of nozzle assembly, the step C of cylinder block set Set on the connector portions of cylinder block set, the connector portions of nozzle assembly are plastic part, the gold that the connector portions of cylinder block set are integrally formed Belong to part.The joint area of nozzle assembly above-mentioned is in internal frame, and internal frame and shell are independent, and internal frame can be plastic part, therefore connector Portion is plastic part.At this point, the connector portions of cylinder block set only need to be integrally formed out two concentric steps C.It is integrally formed out The mode of two concentric steps C, two direct concentricitys of step C are reliable and easy to process.

Alternatively, in some embodiments, the mating surface D of nozzle assembly is metalwork, the step C of cylinder block set is plastics Part.Preferably, cylinder block set includes the joint body and Plastibell of metal, and each Plastibell forms a step C, plastics Lantern ring is fixed with joint body.Plastibell is fixed on joint body to be interference fitted, be bonded, in a manner of thermoplastic or injection molding etc..

When the connector portions of nozzle assembly and the connector portions of cylinder block set are all metalworks, to avoid metal covering from directly contacting and There is sharp wear, in connector portions two Plastibells of setting of cylinder block set, the connector portions of Plastibell and nozzle assembly are connect Touching, region of the cylinder block set connector portions in addition to Plastibell and nozzle assembly connector portions have gap.In this way, avoiding two metals It directly wears and concentricity is caused to increase in face.It, can be in the case where lacking any element specifically disclosed herein, limitation Realize utility model shown and described herein.Used terms and expressions method is used as the term of explanation rather than limits, and And it is not intended to any equivalent shown in excluded in the use of these terms and expressions methods with the feature or part thereof, and And it should be realized that various remodeling are all feasible in the scope of the utility model.It is therefore to be understood that although by various Embodiment and optional feature specifically disclose the utility model, but the modifications and variations of concept as described herein can be by this Field those of ordinary skill is used, and it is practical new to think that these modifications and variations fall into the sheet that the appended claims limit Within the scope of type.

It is described herein or record article, patent, patent application and every other document and can electronically obtain The content of information to a certain extent in full include herein by reference, just as each individual publication by specific and single Solely point out by reference.Applicant retains from any of any this article, patent, patent application or other documents And all material and information are incorporated into the right in the application.

Claims (5)

1. a kind of nozzle assembly, there is gas pipeline in nozzle assembly, which is characterized in that gas pipeline includes tube body and connector, Connector has tight lock part and linkage section.

2. nozzle assembly as described in claim 1, which is characterized in that connector is independent part, and connector is fixed on pipe Body one end.

3. nozzle assembly as described in claim 1, which is characterized in that be equipped with nut in nozzle assembly, tight lock part is and nut The screw thread of engagement.

4. nozzle assembly as described in claim 1, which is characterized in that the tight lock part of connector is expanded with respect to linkage section.

5. nozzle assembly as claimed in claim 4, which is characterized in that a limit can be formed between linkage section and locking section Step, limited step are in inclined-plane.