CN219442310U - Precise screw valve capable of rapidly breaking rubber - Google Patents

Abstract

The utility model relates to the technical field of single-liquid screw valves, in particular to a precise screw valve capable of rapidly breaking glue. According to the utility model, the air cylinder drives the moving assembly and the firing pin to reciprocate up and down, and the firing pin with the plug is arranged, so that the firing pin is driven to reciprocate up and down, the opening and closing of the needle head can be realized, the quick glue breaking can be realized, and the response type of glue dispensing and the stability of glue quantity are improved; meanwhile, the firing pin and the needle head are designed in a split mode, so that the processing difficulty and the processing cost can be reduced, and the service life of the firing pin is prolonged; the diaphragm-free pressure sensor is arranged at the outlet of the screw, so that the outlet pressure of the screw can be accurately detected in real time and closed-loop control is carried out on the outlet pressure of the screw.

Description

Precise screw valve capable of rapidly breaking rubber

Technical Field

The utility model relates to the technical field of single-liquid screw valves, in particular to a precise screw valve capable of rapidly breaking rubber.

Background

Dispensing, which is a process also called gluing, pouring, dripping and the like, is to smear, fill and drop electronic glue, oil or other liquid onto a product, so that the product has the functions of pasting, filling, insulating, fixing, smoothing the surface and the like. Along with the gradual maturation of the automatic dispensing technology, the dispensing process has higher and higher dispensing precision requirements, especially for high-viscosity fluid and fluid with tiny solid particles, and the precision requirements of screw dispensing valves for such fluid are more and more strict. The existing single-liquid screw valve generally comprises a motor, a motor seat, a screw, a stator, a rubber outlet head and the like, when the single-liquid screw valve is used, the motor rotates to drive the screw to rotate, fluid flows downwards along a screw groove along with the rotation of the screw, and the fluid accumulates at an outlet to form pressure and is extruded from the rubber outlet head.

However, the existing single-fluid screw valve technology still has the following disadvantages: (1) The existing single-liquid screw valve can realize metering type dispensing, and is often incapable of rapidly breaking and leaking glue due to the influences of glue supply pressure, flexible stators, liquid compressibility, elastic deformation of structural materials and the like; (2) The existing single-liquid screw valve can not accurately control the pressure in the cavity to cause unstable flow or still continuously work when the needle is blocked to cause the pressure-holding damage in the screw valve; (3) The existing needle striking valve firing pin is designed integrally, and has the defects of high processing difficulty, high cost, short service life of the firing pin and the like; (4) The stroke of the existing firing pin valve firing pin is adjusted by adopting a bolt, and the firing pin valve firing pin is easy to press to deform and damage the firing pin.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the present utility model provides a precision screw valve capable of quick breaking, comprising a moving assembly, a screw assembly and a striker assembly; the side wall of the screw assembly is connected with the moving assembly, and the bottom of the screw assembly is connected with the firing pin assembly; the moving assembly drives the screw assembly and the firing pin assembly to move up and down;

the screw assembly comprises a servo motor module, a first cylinder, a glue inlet head and an outlet, wherein the upper part of the first cylinder is connected with the servo motor module, and a high-precision screw and a stator which are sequentially connected are arranged in the center of the first cylinder; the glue inlet head and the outlet are communicated with each other to form a glue channel, and the outlet is positioned at the bottom of the screw rod assembly and is coaxially connected with the firing pin assembly;

the firing pin assembly comprises a firing pin, a second cylinder body and a needle head, the second cylinder body is T-shaped, one end of the second cylinder body is clamped and fixed on the moving assembly, and the other end of the second cylinder body is connected with the needle head; the needle head and the firing pin are in split type design, the firing pin penetrates through the second cylinder body, one end of the firing pin protrudes out of the second cylinder body and is connected with the screw rod assembly, the other end of the firing pin is inserted into the needle head, and the firing pin consists of a firing pin shaft and a plug.

Further, remove the subassembly and include cylinder, mounting panel, U type piece, connecting plate, connecting block, bottom plate and spacing subassembly, cylinder, mounting panel, U type piece and bottom plate connect gradually from last to down, connecting plate, connecting block all are located U type inslot of U type piece, be provided with the connecting hole in the connecting plate, the cylinder pass through the connecting hole with the connecting block is connected, connecting block sliding connection in the U type piece, screw rod subassembly with the lateral wall fixed connection of connecting block.

Further, the limiting assembly comprises a first limiting head and a second limiting head, the first limiting head and the second limiting head are respectively fixed on the upper side and the lower side of the connecting plate and penetrate through the inside of the connecting plate, and one side, connected with the second limiting head, of the first limiting head is abutted against the other side.

Further, all around all protruding are provided with adjustment portion on the mounting panel, adjust cylinder stroke through adjustment portion, adjustment portion runs through the mounting panel and butt spacing subassembly.

Further, a pressure sensor is arranged on one side, far away from the moving assembly, of the bottom of the first cylinder body, and the pressure sensor is used for detecting the pressure at the outlet.

Further, advance gluey head, high-accuracy screw rod and stator and form the glue passageway, first barrel with advance gluey head opposite side and be provided with first exhaust sealing plug, pressure sensor keeps away from one side of first barrel and is provided with the second exhaust sealing plug.

Further, the stator is of a hollow cylindrical structure, the inner wall of the stator is matched with the external threads of the high-precision screw, and a closed space is formed at the joint of the high-precision screw and the stator.

Further, a second groove is formed in the center of the second cylinder body, and the firing pin is inserted in the center of the second groove and forms a step-shaped exhaust gap with the second groove; a first cavity is formed between the second cylinder body and the second groove, an arc groove is formed in one side, close to the firing pin shaft, of the first cavity, and the arc groove is communicated with the exhaust gap.

Further, the firing pin pole includes afterbody, first connecting portion, second connecting portion and head, afterbody, first connecting portion, second connecting portion and head connect gradually from last to down, glue passageway has been seted up to the inside firing pin pole, and the shoulder hole has been seted up to the head circumference of firing pin pole, the shoulder hole with the inside glue passageway of firing pin pole link up, and the aperture gradually reduces from inside to outside.

Further, the head is provided with a plug, the needle is in a funnel shape, and the plug is in a spherical surface or a conical surface matched with the funnel opening of the needle.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the air cylinder drives the moving assembly and the firing pin to reciprocate up and down, and the firing pin with the plug is arranged, so that the firing pin is driven to reciprocate up and down, the opening and closing of the needle head can be realized, the quick glue breaking can be realized, and the response type of glue dispensing and the stability of glue quantity are improved; the joint of the high-precision screw rod and the stator forms a closed space, and the servo motor module continuously extrudes glue particles by rotating the high-precision screw rod to form a stable glue-spraying effect;

2. according to the utility model, the striker and the needle are designed in a split manner, so that the processing difficulty and the processing cost can be greatly reduced; after the needle is worn, the whole firing pin assembly does not need to be replaced, only the needle is needed to be replaced, so that the economic cost is saved, and the service life of the firing pin is prolonged;

3. the diaphragm-free pressure sensor is arranged at the outlet of the screw, so that the pressure of the outlet of the screw can be accurately detected in real time and closed-loop control can be carried out on the pressure;

4. according to the utility model, the stroke control of the air cylinder can be realized through the adjusting bolt, and the first limiting head and the second limiting head are used for limiting, so that when the bolt is regulated to the limit, the pressure generated by the bolt can not act on the firing pin, and the firing pin can be effectively protected.

Drawings

FIG. 1 is a schematic diagram of a precise screw valve capable of quick breaking of glue according to the present utility model;

FIG. 2 is a schematic diagram of a front structure of a mobile assembly according to an embodiment of the present utility model;

FIG. 3 is a side cross-sectional view of a mobile assembly according to an embodiment of the present utility model;

FIG. 4 is a schematic view of the front structure of a screw assembly according to an embodiment of the present utility model;

FIG. 5 is a side structural cross-sectional view of a screw assembly according to an embodiment of the present utility model;

FIG. 6 is a cross-sectional view of the front structure of the firing pin assembly according to the present utility model;

FIG. 7 is a schematic cross-sectional view of a first chamber according to an embodiment of the utility model;

FIG. 8 is a schematic view of the structure of a striker according to an embodiment of the present utility model;

FIG. 9 is a schematic diagram of a structure of a spherical plug according to an embodiment of the present utility model;

FIG. 10 is a schematic view of a plug with a conical surface according to an embodiment of the present utility model;

FIG. 11 is a schematic view of the needle according to the embodiment of the present utility model;

fig. 12 is a schematic view of the needle according to the embodiment of the present utility model when the needle is closed.

Reference numerals:

1. a moving assembly; 2. a screw assembly; 3. a striker assembly; 4. a U-shaped block; 5. a cylinder; 6. a mounting plate; 7. a connecting plate; 8. a connecting block; 9. a bottom plate; 10. a slide block; 11. a guide rail; 12. a first positioning head; 13. a locking screw; 14. a second positioning head; 15. a lock nut; 16. a bolt; 17. countersunk head screws; 18. a first vent plug; 19. a servo motor module; 20. a glue inlet head; 21. a pressure sensor; 22. a second vent plug; 23. a stator; 24. a high-precision screw; 25. a plug; 26. a needle; 27. a sealing plug for air flooding; 28. tabletting; 29. a compression nut; 30. a first cavity; 31. a firing pin shaft; 32. a sealing gasket; 201. an outlet; 202. a first cylinder; 301. a second cylinder; 302. an exhaust gap; 303. an arc groove; 310. tail part; 311. a first connection portion; 312. a second connecting portion; 313. a stepped hole; 314. a head; 260. and a second cavity.

Detailed Description

In order to better understand the technical solutions in the present application, the following description will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

It should be noted that, in the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements to be referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model; the terms "first," "second," "third," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "coupled," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally coupled, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1, the utility model provides a precise screw valve capable of rapidly breaking glue, which comprises a moving assembly 1, a screw assembly 2 and a firing pin assembly 3, wherein one side of the screw assembly 2 is connected with the moving assembly 1, the bottom of the screw assembly 2 is provided with an outlet 201, the outlet 201 is coaxially connected with the firing pin assembly 3, and the moving assembly 1 drives the screw assembly 2 and the firing pin assembly 3 to move up and down to perform glue dispensing.

As shown in fig. 2 to 3, the moving assembly 1 includes a U-shaped block 4, an air cylinder 5, a mounting plate 6, a connecting plate 7, a connecting block 8, a bottom plate 9, a limit assembly, a slider 10, a guide rail 11, a locking screw 13, an adjusting portion, and a countersunk screw 17. The cylinder 5, the mounting plate 6, the U-shaped block 4 and the bottom plate 9 are sequentially connected from top to bottom, and the cylinder, the mounting plate 6, the U-shaped block 4 and the bottom plate 9 are positioned on the same central axis, wherein a first groove is formed in the U-shaped block 4, three opening directions are arranged, the first direction and the second direction are relatively parallel and symmetrical, and the first direction and the second direction are perpendicular to the third direction. The first direction of U type piece 4 is connected with mounting panel 6, and the second direction is connected with bottom plate 9, and the third direction is connected with screw rod subassembly 2, and connecting plate 7, connecting block 8 all are located first recess, and connecting plate 7 is located the top of connecting block 8.

A guide rail 11 and a slide block 10 which is matched with the guide rail 11 are arranged in a first groove on the U-shaped block 4, and a connecting block 8 is connected with the slide block 10 so as to enable the connecting block 8 to move up and down in the U-shaped block 4; the cylinder 5 runs through mounting panel 6, and connecting plate 7 is connected with connecting block 8, is provided with the connecting hole in the connecting plate 7 simultaneously, installs countersunk head screw 17 in the connecting hole, is connected cylinder 5 with connecting plate 7, connecting block 8 through countersunk head screw 17, and the one side that connecting block 8 is close to the third direction is connected with screw rod subassembly 2. The air cylinder 5 can convert the pressure in the air into mechanical energy, drives the connecting block 8 to reciprocate up and down in the first groove of the U-shaped block 4, and drives the screw assembly 2 to reciprocate up and down through the connecting block 8.

All be provided with adjustment portion all around on the mounting panel 6, this adjustment portion includes lock nut 15 and bolt 16, and wherein bolt 16 runs through mounting panel 6 and with spacing subassembly looks butt, bolt 16 length is greater than the thickness of mounting panel 6, adjusts the height of mounting panel 6 on bolt 16 through adjusting bolt 16 to drive cylinder 5 highly change, play the effect of adjusting cylinder 5 stroke promptly through adjusting bolt 16, and then indirectly adjust the firing pin stroke.

The limiting component and the adjusting part are positioned on the same central axis and below the adjusting part. The limiting assembly comprises a first limiting head 12 and a second limiting head 14, the first limiting head 12 and the second limiting head 14 are respectively fixed on the upper side and the lower side of the connecting plate 7, penetrate through the inside of the connecting plate 7, are oppositely arranged with the second limiting head 14, are mutually abutted, and the abutting parts are fixed through locking screws 13. The protruding head 314 of the first limiting head 12 is clamped between the mounting plate 6 and the connecting plate 7, the protruding head 314 of the second limiting head 14 is clamped between the connecting plate 7 and the connecting block 8, and gaps are reserved between the mounting plate 6 and the connecting plate 7 and between the connecting plate 7 and the connecting block 8. In this application, set up spacing subassembly into two pairs of locking-type spacing head's form, when impelling bolt 16 to twist down the extreme position, because the effect of spacing head, can not press connecting plate 7, the firing pin subassembly 3 that the screw rod subassembly 2 below is connected can not receive the pressure effect of bolt 16 promptly, can effectively protect the firing pin.

The bottom plate 9 is installed in the second direction of U type piece 4, and the one end that bottom plate 9 is close to screw rod subassembly 2 extends to be provided with U type breach, breach direction orientation screw rod subassembly 2 direction, U type breach diameter and the external diameter looks adaptation of firing pin subassembly 3 for centre gripping firing pin subassembly 3 increases the stability of firing pin subassembly 3. Screw holes are formed in the periphery of the bottom plate 9 and used for fixing the precise screw valve to a use place.

As shown in fig. 4-5, the screw assembly 2 includes a servo motor module 19, a first barrel 202, a first vented seal plug 18, a glue inlet head 20, a pressure sensor 21, a second vented seal plug 22, a high precision screw 24, and a stator 23. The upper side of the first barrel 202 is connected with a servo motor module 19, a high-precision screw 24 and a stator 23 are arranged in the first barrel 202, the upper side of the high-precision screw 24 is connected with a servo motor, the lower side of the high-precision screw is connected with the stator 23, the stator 23 is communicated with an outlet 201 of the first barrel 202, the servo motor module 19, the high-precision screw 24 and the stator 23 are positioned on the same central axis, the stator 23 is of a hollow cylindrical structure, the hollow inner wall of the stator 23 is of a corrugated structure, the corrugated structure is matched with external threads of the high-precision screw 24, during glue discharging, glue is extruded through the high-precision screw 24, namely glue liquid enters a closed space formed by the high-precision screw 24 and the stator 23 through a glue inlet head 20, a closed space is formed at the joint of the high-precision screw 24 and the stator 23, and the servo motor module 19 continuously extrudes glue particles through rotating the high-precision screw 24 to form a stable glue discharging effect.

The first cylinder 202 is prismatic similar to a cuboid, one side of the first cylinder 202 is connected with the moving assembly 1, a pressure sensor 21 is arranged at the bottom of the side, opposite to the moving assembly 1, of the first cylinder 202, a glue inlet head 20 is arranged at the side, adjacent to the moving assembly 1, of the first cylinder 202, a glue inlet head 20, a high-precision screw 24, a stator 23 and an outlet 201 are formed into a glue channel, and under the action of a servo motor, glue enters from the glue inlet head 20, flows through the high-precision screw 24 and the stator 23, and then flows out from the outlet 201 into the firing pin assembly 3. The first cylinder 202 is provided with the first exhaust sealing plug 18 on one side opposite to the glue inlet head 20, a cavity flow channel is arranged between the first cylinder 202 and the high-precision screw 24 as well as between the first cylinder 202 and the stator 23, and air in the cavity flow channel in the first cylinder can be discharged by arranging the first exhaust sealing plug 18, so that the pressure balance inside and outside the first cylinder 202 is realized, and the unstable glue flow caused by the pressure in the first cylinder 202 is avoided.

The pressure sensor 21 is a diaphragm-free pressure sensor 21, and the pressure sensor 21 has the advantages of high frequency response, small volume, low power consumption, high sensitivity, good precision and the like, and can accurately detect the pressure of the screw outlet 201 in real time by arranging the pressure sensor 21 near the outlet 201, and perform closed-loop control on the pressure, thereby improving the dispensing precision. The side of the pressure sensor 21 far away from the first cylinder 202 is provided with a second exhaust sealing plug 22, and the second exhaust sealing plug 22 is communicated with the interior of the pressure sensor 21 and is used for exhausting air in a flow channel of the pressure sensor 21, so that the accuracy of the pressure sensor 21 caused by air pressure difference in the interior is avoided.

As shown in fig. 6-10, the firing pin assembly 3 includes a second barrel 301, a stopper 25, a needle 26, a flood seal 27, a compression tab 28, a compression nut 29, a first cavity 30, a firing pin shaft 31, and a gasket 32. The second cylinder 301 is T-shaped, is clamped at the U-shaped notch of the bottom plate 9, and is fixed with the bottom plate 9 through a threaded structure. The center of the second cylinder 301 is downwards provided with a second groove which is cylindrical, the opening direction is upward, and the height of the second groove is smaller than that of the second cylinder 301. The firing pin shaft 31 is inserted in the center of the second groove and penetrates the second cylinder 301 downwards, and a channel for glue to flow is arranged inside the firing pin shaft 31.

The firing pin shaft includes a tail portion 310, a first connecting portion 311, a second connecting portion 312, and a head portion 314, the tail portion 310, the first connecting portion 311, the second connecting portion 312, and the head portion 314 are sequentially connected from top to bottom, and the four are located on the same central axis, and the first connecting portion 311, the second connecting portion 312, and the head portion 314 are all cylindrical, and the diameters thereof are sequentially reduced. The inner part of the firing pin shaft 31 is provided with a glue channel, the head 314 of the firing pin shaft 31 is provided with a stepped hole 313 in the circumferential direction, the stepped hole 313 is communicated with the glue channel in the firing pin shaft 31, the head 314 of the firing pin shaft 31 is provided with a choke plug 25, and the choke plug 25 is arranged below the stepped hole 313.

The tail part 310 of the firing pin shaft 31 protrudes above the second cylinder 301, the shape of the tail part 310 is matched with the position of the outlet 201 of the screw rod assembly 2, and the tail part is used for connecting the screw rod assembly 2, so that glue solution in the stator 23 flows into the firing pin shaft 31 through the outlet 201, and the outlet 201 of the screw rod assembly 2 is coaxially connected with the firing pin assembly 3, so that the firing pin shaft has the characteristics of short channel and small resistance, and can promote smooth circulation of the glue solution. The sealing gasket 32 is sleeved below the tail part 310, the joint of the firing pin assembly 3 and the screw rod assembly 2 can be sealed by arranging the sealing gasket 32, and meanwhile, a gap is reserved between the screw rod assembly 2 and the second cylinder 301 by the sealing gasket 32 with the height slightly higher than that of the second cylinder 301, so that air in the second cylinder 301 is discharged to the outside through the gap.

The outer shape of the first connection portion 311 is configured to be stepped, and a stepped exhaust gap 302 is formed between the first connection portion 311 and the second connection portion 312 and the second groove, and the exhaust effect can be further improved by forming the stepped exhaust gap 302 through the above configuration. A first cavity 30 is formed between the second cylinder 301 and the second groove, a circular arc groove 303 is formed in one side, close to the second connecting portion 312, of the first cavity 30, the circular arc groove 303 is communicated with an exhaust gap 302 in the second groove, and through the arrangement, generated air pressure can be discharged to the outside through the circular arc groove 303 and the exhaust gap 302 when the firing pin shaft 31 moves up and down, so that the movement of the firing pin shaft 31 is prevented from being influenced.

The bottom of the second cylinder 301 protrudes downwards, the diameter of the protruding part is the same as that of the needle 26, the protruding part at the bottom of the second cylinder 301 is abutted with the pressing sheet 28, the pressing sheet 28 is positioned between the second cylinder 301 and the needle 26, the pressing sheet 28 surrounds the head 314, and the distance between the bottom of the second connecting part 312 and the pressing sheet 28 is larger than the distance between the plug 25 and the opening of the needle 26. The protruding part of the second cylinder 301, the pressing sheet 28 and the needle 26 are fixedly connected through the pressing nut 29, the needle 26, the pressing sheet 28 and the second cylinder 301 are jointly fixed on the bottom plate 9 of the moving assembly 1, fixed-point dispensing is realized through the fixation of the needle 26, the influence of the stability of a striker is avoided, and the dispensing accuracy is improved; the provision of the plunger 28 serves as a cushion to prevent the plunger 31 from directly striking the needle 26 and causing damage.

The air-filling sealing plug 27 is sleeved above the head 314, and the air-filling sealing plug 27 can seal the inside of the needle 26 when the plug 25 plugs the needle 26 downwards, so that the sealing pressure is high, the glue can be quickly broken, and the glue can be prevented from dripping; the plunger 31 has a plurality of stepped holes 313 formed in the inner circumference thereof, and glue solution in the plunger 31 can flow into the needle 26 through the stepped holes 313. The stepped hole 313 is positioned between the air-permeable sealing plug 27 and the plug 25, the aperture of the stepped hole 313 is gradually reduced from inside to outside, and the glue solution resistance can be reduced to the greatest extent.

The plunger 31 and the stopper 25 constitute a plunger that is inserted into the needle 26. Compared with the integrated design, the needle 26 and the firing pin are in a split design, wherein the firing pin shaft 31 is made of stainless steel, the plug 25 is made of tungsten steel or ceramic and other high-hardness and high-wear-resistant materials, and the processing difficulty and the processing cost can be greatly reduced; the needle 26 is detachably fixed outside the firing pin through the compression nut 29, after the needle 26 is worn, the whole firing pin assembly 3 does not need to be replaced, only the needle 26 needs to be replaced, the economic cost is saved, and the service life of the firing pin is prolonged.

The needle 26 joint is outside in the air-out sealing plug 27, and needle 26 below sets up to the funnel-shaped, is provided with second cavity 260 in the needle 26, and second cavity 260 is located air-out sealing plug 27 below, and the opening direction is downward, and second cavity 260 below shape setting also sets up to the funnel-shaped, and second cavity 260 bottom is the gum outlet, and firing pin pole 31 peg graft in second cavity 260, and firing pin pole 31 diameter is less than second cavity 260 diameter.

The plug 25 may be configured as a sphere in line contact with the funnel opening of the second cavity 260 or a conical surface in surface contact, the plug 25 is connected with the striker rod 31 to form a striker, and the up-and-down movement of the striker rod is used to realize the opening and closing of the needle 26, specifically: the air cylinder 5 drives the firing pin to move up and down, when the firing pin moves up, the plug 25 is separated from the funnel opening, glue solution of the firing pin shaft 31 is reserved in the needle 26 through the stepped hole 313, and then flows out through the glue outlet to perform glue dispensing; when dispensing is finished, the air cylinder 5 drives the firing pin to press down, the choke plug 25 plugs the funnel opening in the second cavity 260, glue solution is prevented from flowing out of the funnel opening, and glue breaking is achieved.

As shown in fig. 11-12, the present utility model provides a method for using a precise screw valve capable of quick breaking, in an initial state, under the action of the pressing down of the cylinder 5, the cylinder 5 drives the screw assembly 2 and the firing pin to press down the funnel opening of the second cavity 260 in the needle 26 through the connecting block 8 on the moving assembly 1, and at this time, the needle 26 is in a closed state and no glue is discharged; when the air cylinder 5 moves upwards, the moving assembly 1 drives the screw assembly 2 and the firing pin to move upwards, meanwhile, the servo motor module 19 in the screw assembly 2 is started, glue solution enters from the glue inlet head 20 of the screw assembly 2, passes through the screw and the stator 23, flows into the firing pin from the outlet 201 of the screw assembly 2, flows into the needle 26 from the stepped hole 313 on the firing pin shaft 31, flows out from the glue outlet, and starts dispensing; when dispensing is finished, the screw assembly 2 stops supplying glue, the needle 26 opening can be quickly blocked by downward movement of the firing pin, and the glue is stopped from flowing out of the needle 26, so that quick glue breaking is realized; and repeatedly cycling the working period to perform dispensing.

It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the scope of the present disclosure, since any structural modifications, proportional changes, or dimensional adjustments made by those skilled in the art should not be made in the present disclosure without affecting the efficacy or achievement of the present disclosure.

Although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. The precise screw valve capable of rapidly breaking glue is characterized by comprising a moving assembly (1), a screw assembly (2) and a firing pin assembly (3); the side wall of the screw assembly (2) is connected with the moving assembly (1), and the bottom of the screw assembly is connected with the firing pin assembly (3); the moving assembly (1) drives the screw assembly (2) and the firing pin assembly (3) to move up and down;

the screw assembly (2) comprises a servo motor module (19), a first cylinder (202), a glue inlet head (20) and an outlet (201), wherein the upper part of the first cylinder (202) is connected with the servo motor module (19), and a high-precision screw (24) and a stator (23) which are sequentially connected are arranged at the center of the first cylinder (202); the glue inlet head (20) and the outlet (201) are communicated with each other to form a glue channel, and the outlet (201) is positioned at the bottom of the screw assembly (2) and is coaxially connected with the firing pin assembly (3);

the firing pin assembly (3) comprises a firing pin, a second cylinder (301) and a needle head (26), the second cylinder (301) is T-shaped, one end of the second cylinder (301) is clamped and fixed on the moving assembly (1), and the other end of the second cylinder is connected with the needle head (26); the needle head (26) and the firing pin are of a split design, the firing pin penetrates through the second cylinder body (301), one end of the firing pin protrudes out of the second cylinder body (301) and is connected with the screw rod assembly (2), the other end of the firing pin is inserted into the needle head (26), and the firing pin is composed of a firing pin shaft (31) and a plug (25).

2. The precise screw valve capable of rapidly breaking glue according to claim 1, wherein the moving assembly (1) comprises an air cylinder (5), a mounting plate (6), a U-shaped block (4), a connecting plate (7), a connecting block (8), a bottom plate (9) and a limiting assembly, the air cylinder (5), the mounting plate (6), the U-shaped block (4) and the bottom plate (9) are sequentially connected from top to bottom, the connecting plate (7) and the connecting block (8) are all located in a U-shaped groove of the U-shaped block (4), a connecting hole is formed in the connecting plate (7), the air cylinder (5) is connected with the connecting block (8) through the connecting hole, the connecting block (8) is slidably connected in the U-shaped block (4), and the screw assembly (2) is fixedly connected with the side wall of the connecting block (8).

3. The precise screw valve capable of rapidly breaking glue according to claim 2, wherein the limiting assembly comprises a first limiting head (12) and a second limiting head (14), the first limiting head (12) and the second limiting head (14) are respectively fixed on the upper side and the lower side of the connecting plate (7) and penetrate through the inside of the connecting plate (7), and one side, connected with the second limiting head (14), of the first limiting head (12) is abutted against one side.

4. A quick-break precision screw valve according to claim 3, characterized in that the mounting plate (6) is provided with adjusting parts protruding all around, the stroke of the cylinder (5) is adjusted by the adjusting parts, and the adjusting parts penetrate the mounting plate (6) and abut against the limiting assembly.

5. A quick-break precision screw valve according to claim 1, characterized in that the side of the bottom of the first cylinder (202) remote from the moving assembly (1) is provided with a pressure sensor (21) for detecting the pressure at the outlet (201).

6. The precise screw valve capable of rapidly breaking glue according to claim 5, wherein the glue inlet head (20), the high-precision screw (24) and the stator (23) form a glue channel, a first exhaust sealing plug (18) is arranged on one side of the first cylinder (202) opposite to the glue inlet head (20), and a second exhaust sealing plug (22) is arranged on one side of the pressure sensor (21) away from the first cylinder (202).

7. The precise screw valve capable of rapidly breaking glue according to claim 1, wherein the stator (23) is of a hollow cylindrical structure, the inner wall of the stator (23) is matched with the external thread of the high-precision screw (24), and a closed space is formed at the joint of the high-precision screw (24) and the stator (23).

8. The precise screw valve capable of rapidly breaking glue according to claim 1, wherein a second groove is formed in the center of the second cylinder (301), the firing pin is inserted in the center of the second groove, and a step-shaped exhaust gap (302) is formed between the firing pin and the second groove; a first cavity (30) is formed between the second cylinder (301) and the second groove, an arc groove (303) is formed in one side, close to the firing pin shaft (31), of the first cavity (30), and the arc groove (303) is communicated with the exhaust gap (302).

9. The precise screw valve capable of rapidly breaking glue according to claim 1, wherein the plunger (31) comprises a tail portion (310), a first connecting portion (311), a second connecting portion (312) and a head portion (314), the tail portion (310), the first connecting portion (311), the second connecting portion (312) and the head portion (314) are sequentially connected from top to bottom, a glue channel is formed in the plunger (31), a stepped hole (313) is formed in the periphery of the head portion (314) of the plunger (31), the stepped hole (313) is communicated with the glue channel in the plunger (31), and the aperture is gradually reduced from inside to outside.

10. A precision screw valve capable of quick breaking glue according to claim 9, characterized in that the head (314) is provided with a plug (25), the needle (26) is provided in a funnel shape, the plug (25) is provided as a sphere or conical surface adapted to the funnel opening of the needle (26).