阅读说明：本技术 螺旋胶形涂胶阀 (Spiral rubber-shaped gluing valve ) 是由 张德明 于 2021-07-08 设计创作，主要内容包括：本发明公开了一种螺旋胶形涂胶阀,包括芯轴本体、外套于芯轴本体外的外套组件、设置于外套组件上的供气头以及阀芯组件,所述芯轴本体与外套组件之间形成环形流道,所述芯轴本体下端开设有供胶体挤出的挤出口,所述芯轴本体外圆面中心对称开设有多条引流槽,所述引流槽向下延伸至芯轴本体的下端面,各引流槽的下端围绕挤出口周向分布以引导高压气流流动形成螺旋气流,所述阀芯组件用于开启或封闭挤出口。本发明通过多个螺旋形的引流槽引导形成螺旋风流,进而驱动挤出胶体形成螺旋状,通过螺旋形涂胶工艺使得胶体合理的空间分布,当两个待粘结的部件接触后挤压胶体并使得胶体填充至螺旋线之间的无胶空隙中,使得胶体填充满整个粘结空间内,利于提高粘结效果并提高粘结强度。(The invention discloses a spiral glue-shaped glue spreading valve which comprises a mandrel body, an outer sleeve assembly externally sleeved outside the mandrel body, a gas supply head arranged on the outer sleeve assembly and a valve core assembly, wherein an annular flow channel is formed between the mandrel body and the outer sleeve assembly, an extrusion opening for extruding glue is formed in the lower end of the mandrel body, a plurality of drainage grooves are symmetrically formed in the center of the outer circular surface of the mandrel body, the drainage grooves extend downwards to the lower end surface of the mandrel body, the lower ends of the drainage grooves are circumferentially distributed around the extrusion opening to guide high-pressure airflow to flow to form spiral airflow, and the valve core assembly is used for opening or closing the extrusion opening. According to the invention, the spiral air flow is formed by guiding the plurality of spiral drainage grooves, so that the extruded colloid is driven to form a spiral shape, the colloid is reasonably distributed in space through a spiral gluing process, and the colloid is extruded and filled into a glue-free gap between the spiral lines after two parts to be bonded are contacted, so that the colloid is filled in the whole bonding space, and the improvement of the bonding effect and the bonding strength are facilitated.)

1. A spiral glue-shaped gluing valve is characterized in that: comprises a mandrel body, an outer sleeve component externally sleeved outside the mandrel body, an air supply head arranged on the outer sleeve component and a valve core component, the lower end of the mandrel body extends downwards to the outside of the outer sleeve component, an annular flow passage is formed between the mandrel body and the outer sleeve component, the gas supply head is communicated with the annular flow passage, the lower end of the mandrel body is provided with an extrusion opening for extruding the colloid, a plurality of drainage grooves are symmetrically arranged at the center of the outer circular surface of the mandrel body, each drainage groove deviates from top to bottom towards the same circumferential direction of the mandrel body, the drainage grooves extend downwards to the lower end face of the mandrel body, the lower ends of the drainage grooves are circumferentially distributed around the extrusion port to guide high-pressure airflow to flow to form spiral airflow, the valve core assembly comprises a valve rod capable of being driven to lift and a valve core connected to the bottom of the valve rod, and the valve core extends downwards to the extrusion port to open or close the extrusion port.

2. The spiral glue valve as recited in claim 1, wherein: the valve core assembly further comprises an air cylinder arranged above the outer sleeve assembly, a piston which can be arranged in the air cylinder in a vertically sliding mode and an elastic piece arranged in the air cylinder, the valve rod is connected to the piston, and the elastic piece has elastic force enabling the piston to slide upwards and reset.

3. The spiral glue valve as recited in claim 1, wherein: still including supplying the glued membrane subassembly, it supplies the gluey runner to offer in the glued membrane subassembly, supply glued membrane subassembly lower extreme to extend in the overcoat subassembly with this body coupling of dabber and make and supply gluey runner and extrusion opening intercommunication.

4. The spiral glue valve as recited in claim 1, wherein: the outer sleeve component comprises an adjusting cap and a shunt, the adjusting cap is sleeved on the mandrel body, the shunt is of an annular structure and is arranged in an annular space between the adjusting cap and the shunt in a shape fitting mode, the shunt is located above the drainage grooves, and a plurality of shunting holes I which are in vertical one-to-one correspondence with the drainage grooves are circumferentially distributed in the shunt.

5. The spiral glue valve as recited in claim 4, wherein: the lower end of the mandrel body is a truncated cone-shaped body which is reduced downwards, the drainage groove is formed in the conical surface, and the inner cavity of the adjusting cap is a conical cavity matched with the lower end of the mandrel body.

6. The spiral glue valve as recited in claim 4, wherein: the outer sleeve component further comprises a nozzle outer barrel, the nozzle outer barrel is connected above the adjusting cap, and the air supply head is arranged on the nozzle outer barrel and communicated with an inner cavity of the nozzle outer barrel.

7. The spiral glue valve as recited in claim 6, further comprising: the outer sleeve component further comprises a nozzle seat, the nozzle seat is connected between the mandrel body and the nozzle outer barrel, a plurality of flow distribution holes II which are communicated up and down are circumferentially distributed on the nozzle seat, the upper ends of the flow distribution holes II are communicated with the inner cavity of the nozzle outer barrel, and the lower ends of the flow distribution holes II are communicated with the inner cavity of the adjusting cap.

8. The spiral glue valve as recited in claim 6, further comprising: the outer sleeve component further comprises an inner lining disc, the inner lining disc is arranged in the inner cavity of the nozzle outer barrel and located below the air supply head, and a plurality of flow distribution holes III which are communicated up and down are circumferentially distributed on the inner lining disc.

9. The spiral glue valve as recited in claim 3, wherein: the confession rubber head subassembly includes the inner base and supplies to glue the head, supply to glue the runner and set up on the inner base, the inner base extends downwards in the overcoat subassembly with this body coupling of dabber and make supply to glue the runner and extrude mouthful intercommunication, supply to glue the head and connect in the inner base lateral part and with supply to glue the runner intercommunication.

10. The spiral glue valve as recited in claim 9, further comprising: it glues the chamber to state this internal upper end open-ended storage that has of dabber, it glues the chamber lower extreme and is the truncated cone shape chamber that dwindles downwards to store up to glue the chamber, extrude the mouth and set up in the bottom that stores up gluey chamber and link up with dabber body lower terminal surface, the inner base is connected with dabber body upper end and supplies gluey runner and store up gluey chamber intercommunication, the valve rod is through supplying gluey runner downwardly extending to store up gluey intracavity, the case is connected in the valve rod lower extreme, the case is used for the ball core and realizes extruding opening and close of mouth with the tapered cavity cooperation that stores up gluey intracavity.

Technical Field

The invention relates to the technical field of gluing, in particular to a spiral glue-shaped gluing valve.

Background

A large number of gluing processes are used in automobile manufacturing to realize connection of various parts, a gluing valve is generally adopted in the existing gluing process to carry out gluing, an outlet of the gluing valve is of a cylindrical or elliptic cylindrical structure, so that the gluing shape can only form a cylindrical straight line shape or an elliptic straight line shape, the gluing amount for reasonably filling glue is difficult to control due to single glue distribution structure, glue solution overflow caused by excessive gluing amount is easy to occur, or the bonding strength is insufficient due to insufficient gluing amount, and particularly in the edge gluing coating process, the existing gluing valve is difficult to meet the use requirement of edge gluing coating.

Therefore, a spiral glue-shaped glue coating valve is needed, high-pressure airflow is introduced into the glue coating valve, so that a spiral airflow is formed at an outlet of a glue coating nozzle, a glue strip extruded by a blowing mandrel can be driven to form a spiral structure, and the glue outlet amount of glue can be controlled to enable the glue to be reasonably filled.

Disclosure of Invention

In view of the above, the present invention provides a spiral glue-shaped glue-applying valve, in which a high-pressure air flow is introduced to form a spiral air flow at an outlet of a glue-applying nozzle, so that a glue strip extruded through a blowing mandrel can be driven to form a spiral structure, thereby facilitating control of the glue output amount of the glue body and reasonable filling of the glue body.

The spiral rubber-shaped gluing valve comprises a mandrel body, an outer sleeve component externally sleeved outside the mandrel body, an air supply head arranged on the outer sleeve component and a valve core component, the lower end of the mandrel body extends downwards to the outside of the outer sleeve component, an annular flow passage is formed between the mandrel body and the outer sleeve component, the gas supply head is communicated with the annular flow passage, the lower end of the mandrel body is provided with an extrusion opening for extruding the colloid, a plurality of drainage grooves are symmetrically arranged at the center of the outer circular surface of the mandrel body, each drainage groove deviates from top to bottom towards the same circumferential direction of the mandrel body, the drainage grooves extend downwards to the lower end face of the mandrel body, the lower ends of the drainage grooves are circumferentially distributed around the extrusion port to guide high-pressure airflow to flow to form spiral airflow, the valve core assembly comprises a valve rod capable of being driven to lift and a valve core connected to the bottom of the valve rod, and the valve core extends downwards to the extrusion port to open or close the extrusion port.

Further, the valve core assembly further comprises an air cylinder arranged above the outer sleeve assembly, a piston arranged in the air cylinder in a vertically sliding mode and an elastic piece arranged in the air cylinder, the valve rod is connected to the piston, and the elastic piece has elastic force enabling the piston to slide upwards and reset.

Further, still including supplying the glued membrane subassembly, it supplies the gluey runner to offer in the glued membrane subassembly, supply glued membrane subassembly lower extreme to extend in the overcoat subassembly with this body coupling of dabber and make and supply gluey runner and extrusion opening intercommunication.

Further, overcoat subassembly is including adjusting cap and shunt, it is on the dabber body to adjust the cap overcoat, the shunt is the annular structure and shape to set up in the annular space between adjusting cap and shunt, the shunt is located the drainage groove top, circumference distributes on the shunt has a plurality ofly and the vertical one-to-one's in each drainage groove branch discharge orifice I.

Further, the lower extreme of dabber body is the truncated cone who dwindles downwards, the drainage groove is seted up on the conical surface, adjust the cap inner chamber and be the toper chamber with dabber body lower extreme adaptation.

Further, the jacket assembly further comprises a nozzle outer barrel, the nozzle outer barrel is connected above the adjusting cap, and the air supply head is arranged on the nozzle outer barrel and communicated with an inner cavity of the nozzle outer barrel.

Further, the overcoat subassembly still includes the nozzle holder, the nozzle holder is connected between dabber body and nozzle urceolus, the circumference distributes on the nozzle holder has a plurality of reposition of redundant personnel holes II that communicate from top to bottom, II upper ends of reposition of redundant personnel holes and nozzle urceolus inner chamber intercommunication, lower extreme and regulation cap inner chamber intercommunication.

Further, the outer sleeve component further comprises an inner lining disc, the inner lining disc is arranged in the inner cavity of the nozzle outer barrel and located below the air supply head, and a plurality of flow distribution holes III which are communicated up and down are circumferentially distributed on the inner lining disc.

Further, supply the rubber head subassembly to include the inner base and supply the gluey head, supply to glue the runner and set up on the inner base, the inner base extends downwards in the overcoat subassembly and this body coupling of dabber and makes and supply to glue the runner and extrude mouthful intercommunication, supply to glue the head and connect in the inner base lateral part and with supply to glue the runner intercommunication.

Further, this internal upper end open-ended that has of dabber stores up gluey chamber, store up the upper end mouth in gluey chamber and supply gluey runner's upper end mouth intercommunication, store up gluey chamber lower extreme and be the truncated cone-shaped chamber that dwindles downwards, extrude the mouth and set up in the bottom of storing up gluey chamber and link up with dabber body terminal surface down, inner base is connected and supplies gluey runner and store up gluey chamber intercommunication with dabber body upper end, the valve rod supplies gluey runner downwardly extending to store up gluey intracavity, the case is connected in the valve rod lower extreme, the case is used for the ball core and realizes extruding opening and close of mouth with storing up gluey intracavity's toper chamber cooperation.

The invention has the beneficial effects that:

the valve body of the invention is introduced with high-pressure airflow to enable the outlet of the gluing nozzle to form spiral airflow, the extrusion amount of the colloid is accurately controlled by opening and closing the valve core, the rubber strip is extruded to form a spiral body with the controllable extrusion amount and height by matching with the spiral airflow, and the reasonable filling of the colloid is facilitated by controlling the glue output amount and the glue output form of the colloid;

according to the invention, the spiral air flow is formed by guiding through the plurality of spiral drainage grooves, so that the extruded colloid is driven to form a spiral shape, the colloid is reasonably distributed in a space through a spiral gluing process, and is extruded and filled into a glue-free gap between the spiral lines after two parts to be bonded are contacted, so that the colloid is filled in the whole bonding space, the bonding effect is improved, the bonding strength is improved, the stress distribution is more uniform, the gluing amount can be more accurately controlled, the glued liquid is prevented from overflowing after bonding, the bonding is firm and attractive, the sealing property and the rust resistance of the product are ensured to meet the requirements, and the production cost is reduced; the coating process has better applicability to the coating process of the hem adhesive in the automobile, can better control the coating amount, can greatly reduce the difficulty of the coating process of the hem adhesive, and improves the bonding effect;

according to the invention, the high-pressure air flow is uniformly distributed in the circumferential direction and uniformly distributed in each splitter box by arranging the multilayer splitter structure, so that the improvement of the splitting stability at the air outlet is facilitated, the stable spiral air flow is formed, the rubber column is stably molded, the glue coating amount is conveniently and accurately controlled, and the improvement of the bonding effect is facilitated.

Drawings

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

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

FIG. 2 is a partial schematic view of the structure;

FIG. 3 is a schematic view of a mandrel body structure;

FIG. 4 is a side view of the mandrel body;

FIG. 5 is a schematic cross-sectional view of the mandrel body;

FIG. 6 is a schematic bottom view of the mandrel body;

FIG. 7 is a schematic view of a gel extrusion structure;

FIG. 8 is a schematic view of a hem glue application configuration;

Detailed Description

As shown in the figures, the embodiment provides a spiral glue-shaped glue-applying valve, which includes a mandrel body 10, an outer sleeve component 20 externally sleeved outside the mandrel body, a gas supply head 30 arranged on the outer sleeve component, and a valve core component 50, wherein the lower end of the mandrel body extends downward to the outside of the outer sleeve component, an annular flow channel is formed between the mandrel body and the outer sleeve component, the gas supply head is communicated with the annular flow channel, the lower end of the mandrel body is provided with an extrusion port 11 for extruding glue, the outer circumferential surface of the mandrel body is centrally and symmetrically provided with a plurality of drainage grooves 12, each drainage groove is offset to the same circumferential direction of the mandrel body from top to bottom, the drainage grooves extend downward to the lower end surface of the mandrel body, the lower ends of the drainage grooves are circumferentially distributed around the extrusion port to guide high-pressure gas flow to form spiral gas flow, the valve core component includes a valve rod 51 capable of being driven to lift and a valve core 52 connected to the bottom of the valve rod, the valve core extends downwards to the extrusion port to open or close the extrusion port.

The outer contour of the outer sleeve component can be a cylindrical structure or a rectangular structure, in the embodiment, the outer contour of the outer sleeve component is integrally a cylindrical structure, the valve core component 50 is arranged at the upper end of the outer sleeve component, and the arrangement of the valve rod and the valve core is combined with that shown in fig. 1, so that the opening of the extrusion opening can be conveniently opened or closed, and the opening size of the extrusion opening can be accurately controlled, and further the extrusion amount can be accurately controlled; referring to fig. 2, the gas supply head is a threaded joint, the gas supply head 30 is used for externally connecting a high-pressure gas supply device, guiding the high-pressure gas flow into the annular flow, and making the high-pressure gas flow into the drainage groove, and making the high-pressure gas flow out from the lower end of the mandrel body through the drainage of the drainage groove and forming a spiral gas flow at the extrusion port; referring to fig. 3, eight drainage grooves are distributed on the outer circle of the mandrel body, each drainage groove is roughly spirally arranged around the outer circle of the mandrel body, and the airflows sprayed by the drainage grooves jointly form a spiral airflow, as shown in fig. 7, the airflow can drive the rubber columns extruded from the extrusion ports to rotate and form a spiral pattern, and along with the linear movement of the valve body, the rubber extruded from the mandrel body is coated on the surface of a component in a spiral linear superposition structure; with reference to fig. 8, the part a14 is adhered to the part B15 through the colloid 16 after being hemmed, and the coating process in the embodiment has better applicability to the coating process of the hemming adhesive in an automobile, can better control the coating amount, can greatly reduce the difficulty of the coating process of the hemming adhesive, and improves the bonding effect; this rubber coating mode makes the reasonable spatial distribution of colloid through spiral rubber coating technology, and through the accurate control extrusion capacity of valve rod, extrude the colloid and make the colloid fill to the no glue space between the helix after two parts that treat the bonding contact, make in the colloid fills up whole bonding space, do benefit to and improve the bonding effect and improve bonding strength, it is more even to guarantee stress distribution, control rubber coating volume that can be more accurate, make the back glue solution that bonds not spill over, it is firm pleasing to the eye to bond, ensure that product leakproofness and antirust nature meet the requirements, and low in production cost.

In this embodiment, the lower end of each drainage groove faces the outside of the extrusion port, that is, the lower end of each drainage groove is not directly aligned with the extrusion port, as shown in fig. 6, a line a is a pointing direction of the lower end of each drainage groove along the lower end surface of the mandrel body, the direction is located outside the extrusion port, eight directions corresponding to the eight drainage grooves are formed, wherein the eight lines a intersect to form a regular octagon, an inscribed circle of the octagon is coaxially arranged with the extrusion port, and the diameter of the inscribed circle is greater than the inner diameter of the extrusion port; through this mode for the air current that flows in each drainage inslot encircles around extruding the mouth and forms spiral air current, can drive the colloid that extrudes from extruding the mouth and form helical structure, does benefit to and makes the colloid form reasonable space distribution pattern, is convenient for improve the rubber coating degree of consistency of colloid.

In this embodiment, still include and supply the glued membrane subassembly 40, it supplies the gluey runner to offer in the gluey membrane subassembly, supply glued membrane subassembly lower extreme to extend in the overcoat subassembly with dabber body coupling and make and supply gluey runner and extrusion opening intercommunication. The glue supply head assembly is externally connected with glue supply equipment, supplies glue to the extrusion opening of the mandrel body, and enables the glue to be extruded through the extrusion opening to form a glue strip;

in this embodiment, the glue supply assembly 40 includes an inner base 41 and a glue supply head 42, the glue supply channel 43 is disposed on the inner base, the inner base extends downwards into the outer sleeve assembly 20 to be connected with the mandrel body and make the glue supply channel communicate with the extrusion port, and the glue supply head 42 is connected to the side of the inner base and communicates with the glue supply channel. The inner base is of a cylindrical structure, a vertical glue supply flow channel which is coaxially arranged inside the inner base, the lower end of the inner base is used for being connected with the nozzle outer barrel 23 and the nozzle seat 24 as a connecting base, wherein a glue supply head is connected to the side portion of the inner base in a threaded mode, and a valve rod is further installed in the glue supply flow channel and used for opening and closing an extrusion opening.

In this embodiment, the outer sleeve assembly 20 includes an adjusting cap 21 and a diverter 22, the adjusting cap is sleeved on the mandrel body 10, the diverter is in an annular structure and is disposed in an annular space between the adjusting cap and the diverter in a form-fitting manner, the diverter is located above the drainage groove 12, and a plurality of diversion holes i corresponding to the drainage grooves in a vertical one-to-one manner are circumferentially distributed on the diverter. The mandrel body is matched with the adjusting cap, the inner wall of the conical cavity of the adjusting cap can be attached to the outer wall of the lower end of the mandrel so that the drainage groove forms a closed groove, a small gap can be reserved between the inner wall of the conical cavity of the adjusting cap and the outer wall of the lower end of the mandrel, and the drainage groove is a semi-closed groove; wherein the upper end of the mandrel body is a stepped shaft with a small upper part and a big lower part; the outer circular surface of the small diameter section and the large diameter section at the upper end of the mandrel body are provided with threads. The small-diameter section at the upper end of the mandrel body is in threaded connection with the bottom of the nozzle seat 24, the large-diameter section is in threaded connection with the flow divider 22, the flow divider is of a disc-shaped structure, the outer circular surface of the flow divider 22 is attached to the inner circular surface of the adjusting cap 21, a pin 26 is mounted on the adjusting cap to position the flow divider, the inner wall of the adjusting cap is provided with a shaft shoulder surface, and the lower end of the flow divider abuts against the shaft shoulder surface to form axial positioning so as to facilitate installation of the flow divider; the splitter is used for distributing the wind flow flowing from the top to each splitter box evenly.

In this embodiment, the lower extreme of dabber body is the truncated cone who dwindles downwards, the drainage groove is seted up on the conical surface, adjust the cap inner chamber and be the toper chamber with dabber body lower extreme adaptation. Combine 2 to 5 to show, the cone angle of the truncated cone shape body of dabber body lower extreme is 60, and this cone angle can be adjusted according to the in-service use operating mode, and corresponding cover is also the toper chamber with dabber body conical surface adaptation in the regulation cap inner chamber of dabber body lower extreme for the drainage groove extends towards extrusion opening downwards to guide the air current to extrude mouthful department slant flow, and then to extruding the gluey post spiral drive that mouthful department extruded.

In this embodiment, the outer sleeve assembly 20 further includes a nozzle outer cylinder 23 connected above the adjusting cap 21, and the air supply head 30 is disposed on the nozzle outer cylinder 23 and is communicated with the inner cavity of the nozzle outer cylinder 23. As shown in fig. 2, the nozzle outer cylinder 23 is a cylindrical structure, the nozzle outer cylinder is sleeved on the inner base 41, and the gas supply head 30 is connected to the nozzle outer cylinder by screw threads;

in this embodiment, the outer sleeve assembly 20 further includes a nozzle holder 24, the nozzle holder is connected between the mandrel body and the nozzle outer cylinder, a plurality of vertically-communicated flow distribution holes ii are circumferentially distributed on the nozzle holder 24, the upper ends of the flow distribution holes ii are communicated with the inner cavity of the nozzle outer cylinder 23, and the lower ends of the flow distribution holes ii are communicated with the inner cavity of the adjusting cap 21. As shown in fig. 2, sealing rings are disposed between the inner base 41 and the nozzle outer cylinder 23, between the nozzle holder 24 and the adjusting cap 21, between the upper end surface of the mandrel body 10 and the lower end surface of the inner base 41, and between the inner base 41 and the glue supplying head 42; the lower section of the inner base 41 is a stepped shaft with a large upper part and a small lower part, the small diameter section of the stepped shaft is a threaded section, the nozzle outer cylinder 23 is externally sleeved on the large diameter section of the lower section of the inner base 41, the nozzle seat 24 is in threaded connection with the small diameter section of the lower section of the inner base, the nozzle seat 24 upwards abuts against the bottom of the nozzle outer cylinder 23, and the nozzle outer cylinder is axially positioned through a shaft shoulder of the inner base 41 and the nozzle seat 24; the inner cavity of the nozzle outer cylinder is a stepped cavity with a small upper part and a large lower part, wherein the small diameter section of the inner cavity of the nozzle outer cylinder is matched with the large diameter section of the lower section of the inner base 41 in a form-fitting manner, an upper annular cavity 27 is formed between the large diameter section of the inner cavity of the nozzle outer cylinder 23 and the small diameter section of the lower section of the inner base, and the gas supply head 30 is communicated with the upper annular cavity; the adjusting cap 21 is screwed to the lower end of the nozzle holder 24, and the flow divider 22 is located below the nozzle holder 24 with a gap maintained therebetween in the axial direction to form a lower annular chamber 28; the high-pressure gas introduced through the gas supply head flows into the upper annular cavity 27 firstly, so that the high-pressure gas flow forms certain buffering and is uniformly distributed in the circumferential direction, then flows into the lower annular cavity after being distributed by the nozzle seat 24, is further uniformly distributed in the circumferential direction in the process, and finally is guided into the corresponding drainage groove through the distribution of the distributor to be sprayed out to form spiral gas flow;

in this embodiment, the outer sleeve assembly 20 further includes an inner lining disk 25, the inner lining disk is disposed in the inner cavity of the nozzle outer cylinder 23 and located below the air supply head 30, and a plurality of flow distribution holes iii are circumferentially distributed on the inner lining disk 25 and are communicated up and down. Referring to fig. 2, the lining disk 25 is screwed to the small diameter section of the lower section of the inner base 41, the lining disk 25 is located in the upper annular cavity 27, the lining disk 25 is located above the nozzle seat 24, the lining disk 25 includes an inner sleeve and an inner disk protruding from the outer circle of the inner sleeve, the inner sleeve is sleeved on the small diameter section of the lower section of the inner base and screwed to the small diameter section, the upper end of the inner sleeve abuts against the shaft shoulder of the inner base 41, the inner disk is provided with a diversion hole iii, the diversion holes i on the diverter, the diversion holes ii on the nozzle seat 24 and the diversion holes iii on the lining disk 25 are staggered in the axial direction, and the number of the diversion holes on each component is the same; high-pressure airflow is uniformly distributed through three-layer flow distribution;

in this embodiment, this internal upper end open-ended that has of dabber stores up gluey chamber 13, store up the last port in gluey chamber 13 and supply gluey runner 43's last port intercommunication, store up gluey chamber lower extreme and be the truncated cone shape chamber that dwindles downwards, extrude the mouth and set up in the bottom of storing up gluey chamber and link up with dabber body lower terminal surface, inner base 41 is connected and supplies gluey runner and store up gluey chamber intercommunication with dabber body upper end, the valve rod supplies gluey runner downwardly extending to store up gluey intracavity, the case is connected in the valve rod lower extreme, the case is used for the ball core and stores up the opening and close of the toper chamber cooperation realization extrusion mouth in gluey chamber 13. The valve core can be driven to operate up and down along with the valve rod, the valve core abuts against the conical surface of the glue storage cavity to form sealing, the opening and closing of the extrusion opening are controlled through the up-and-down operation of the valve core, the valve core is a ball core and is matched with the conical surface, the opening size of the extrusion opening is favorably and accurately controlled, and the extrusion amount of the glue is further accurately controlled; the conical surface of the excircle of the mandrel body is coaxial with the conical surface of the inner circle of the glue storage cavity, and the conical angles of the conical surfaces are the same. This structure makes the wall thickness of dabber body bottom keep invariable, does benefit to the good structural strength who guarantees the dabber body, and the processing of the dabber body of also being convenient for also does benefit to offering of drainage groove simultaneously.

The valve core assembly 50 further comprises a cylinder 53 mounted above the outer sleeve assembly, a piston 54 slidably disposed in the cylinder up and down, and an elastic member 55 disposed in the cylinder, wherein the valve rod is connected to the piston, and the elastic member has an elastic force for sliding the piston upwards and returning the piston.

As shown in fig. 1, the cylinder includes a cylinder body 53a with an open upper end and a cylinder cap 53b screwed and sealed to the upper end of the cylinder body, wherein the cylinder body is a cylinder, and the piston 54 is axially and slidably fitted to the inner circumferential surface of the cylinder body. In this embodiment, the elastic member is a cylindrical coil spring, and of course, an elastic member of other structural forms may be selected and installed in the upper chamber of the cylinder; wherein the cylinder cap is coaxially and threadedly connected with an adjusting sleeve 56 in a sealing manner, the lower end of the adjusting sleeve is provided with an opening, the upper end of the adjusting sleeve extends out of the upper part of the cylinder cap 53b, the upper end of the adjusting sleeve is connected with a rotating handle 59, and the elastic element is arranged in the adjusting sleeve; the upper end of the elastic part is connected with the top of the inner cavity of the adjusting sleeve, the lower end of the elastic part is connected with the piston, and the elastic part is in a stretching state, so that the elastic part has elastic force for enabling the piston to slide upwards; in addition, an air supply hole is formed in the cylinder cap 53b, an external air pipe can supply air to the upper chamber of the cylinder through the air supply hole and compress the piston to move downwards, so that the valve rod and the valve core are driven to move downwards and sealed at the conical surface of the rubber storage chamber to seal the extrusion opening, after pressure is released in the upper chamber of the cylinder, the elastic piece pulls the piston to reset, so that the valve rod and the valve core are driven to move upwards to open the extrusion opening, and the adjusting sleeve can rotate relative to the cylinder cap to adjust the pre-pressure of the elastic piece;

a through hole for the valve rod to pass through is formed in the cylinder body 53a, a multiple sealing ring is arranged between the valve rod and the cylinder body, the lower end of the cylinder body is detachably and hermetically connected with the upper end of the inner base 41 through a bolt, the glue supply flow channel extends upwards to the upper end face of the inner base, the upper end of the glue supply flow channel is a stepped cavity with a large upper part and a small lower part, a large-diameter section of the stepped cavity is provided with internal threads, the large-diameter section is in threaded connection with a locking nut 57, and an avoiding groove 58 for the locking nut is formed in the inner concave part of the lower end of the cylinder body so as to facilitate the installation of the locking nut; the valve rod passes through the locking nut and extends downwards through the glue supply flow channel, the large-diameter section at the upper end of the glue supply flow channel is filled with sealing material, and the sealing material is compressed by the locking nut, so that the sealing material is sealed between the glue supply flow channel and the valve rod.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.