A precision screw valve with quick glue breaking

Abstract

The present application relates to single liquid screw valve technical field, specifically to a kind of precision screw valve of quick glue breaking, including moving assembly, screw assembly and striker assembly, screw assembly side is connected with moving assembly, and screw assembly has mutually communicating glue head and outlet, to form glue channel, outlet is located at the bottom of screw assembly, and coaxially connected with striker assembly.The present application utilizes cylinder to drive moving assembly and striker to reciprocate up and down, and sets up the striker with plug, promotes the switch of needle head to be realized by the up and down movement of striker, can realize quick glue breaking, improve the response type and glue volume stability of dispensing;Striker and needle head are designed in split type simultaneously, can reduce processing difficulty, processing cost, improve the service life of striker;Membraneless pressure sensor is configured at screw outlet, can accurately detect screw outlet pressure in real time, and carries out closed-loop control.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of single-liquid screw valve, in particular to a precise screw valve capable of quickly breaking glue. BACKGROUND

[0002] Dispensing is a process, also known as glue application, glue coating, glue filling, glue dropping, etc. It is to apply, fill, drop electronic glue, oil or other liquids to products to achieve the effects of sticking, filling, insulation, fixing, surface smoothing, etc. With the gradual maturity of automatic dispensing technology, the dispensing process requires higher precision, especially for high-viscosity fluids and fluids with small solid particles. The precision requirements of screw dispensing valves for such fluids are becoming more and more stringent. The existing single-liquid screw valve is generally composed of a motor, a motor base, a screw, a stator, a glue outlet, etc. During use, the motor rotates to drive the screw to rotate, and the fluid flows down along the screw groove as the screw rotates. The fluid accumulates at the outlet to form pressure and is squeezed out from the needle at the outlet.

[0003] However, the existing single-liquid screw valve technology still has the following shortcomings: (1) The existing single-liquid screw valve can achieve metering dispensing, but it often cannot quickly break glue and leak glue due to the influence of glue supply air pressure, flexible stator, liquid compressibility, and elastic deformation of structural materials; (2) The existing single-liquid screw valve cannot accurately control the pressure in the cavity, resulting in unstable flow or continued work when the needle is blocked, causing internal pressure damage to the screw valve; (3) The existing striker valve striker adopts an integrated design, which has the disadvantages of high processing difficulty, high cost, and short service life of the striker; (4) The existing striker valve striker uses a bolt to adjust the stroke, which can easily press the striker, causing deformation and damage to the striker. SUMMARY

[0004] In view of the shortcomings of the prior art, the present application provides a precise screw valve capable of quickly breaking glue, which comprises 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 is connected with the striker assembly. The moving assembly drives the screw assembly and the striker assembly to move up and down. The screw assembly has a glue inlet and an outlet connected with each other to form a glue channel. The outlet is located at the bottom of the screw assembly and is coaxially connected with the striker assembly. A pressure sensor is arranged on one side of the bottom of the screw assembly. The pressure sensor is used to detect the pressure at the outlet. The striker assembly comprises a striker composed of a striker rod and a plug.

[0005] Further, the moving assembly comprises a cylinder, a mounting plate, a U-shaped block, a connecting plate, a connecting block, a bottom plate and a limiting assembly, the cylinder, the mounting plate, the U-shaped plate and the bottom plate are sequentially connected from top to bottom, the connecting plate and the connecting block are located in the U-shaped groove of the U-shaped block, the connecting plate is provided with a connecting hole, the cylinder is connected with the connecting block through the connecting hole, the connecting block is slidingly connected in the U-shaped block, and the screw assembly is fixedly connected with the side wall of the connecting block.

[0006] Further, the limiting assembly comprises first and second limiting heads, the first and second limiting heads are fixed on the upper and lower sides of the connecting plate respectively and penetrate the interior of the connecting plate, and the first limiting head abuts against one side of the second limiting head.

[0007] Further, the mounting plate is provided with adjusting portions around the periphery and protruding outward, the cylinder stroke is adjusted through the adjusting portions, and the adjusting portions penetrate the mounting plate and abut against the limiting assembly.

[0008] Further, the screw assembly further comprises a servo motor module and a first cylinder, the upper portion of the first cylinder is connected with the servo motor module, the center of the first cylinder is provided with a high-precision screw and a stator which are sequentially connected, the glue inlet head, the high-precision screw and the stator form a glue channel, and the pressure sensor is located on the side, away from the moving assembly, of the bottom of the first cylinder; the side, opposite to the glue inlet head, of the first cylinder is provided with a first exhaust sealing plug, and the side, away from the first cylinder, of the pressure sensor is provided with a second exhaust sealing plug.

[0009] Further, the striker assembly further comprises a second cylinder and a needle head, the second cylinder is T-shaped, one end of the second cylinder is clamped and fixed to the moving assembly, and the other end is connected with the needle head; the striker penetrates the second cylinder, one end of the striker protrudes from the second cylinder and is connected with the screw assembly, and the other end is inserted into the needle head.

[0010] Further, the center of the second cylinder is provided with a second groove, the striker is inserted into the center of the second groove, and a stepped exhaust gap is formed between the striker and the second groove; a first cavity is formed between the second cylinder and the second groove, an arc groove is formed on the side, close to the striker rod, of the first cavity, and the arc groove is communicated with the exhaust gap.

[0011] Further, the striker rod (31) comprises a tail portion, a first connecting portion, a second connecting portion and a head portion, the tail portion, the first connecting portion, the second connecting portion and the head portion are sequentially connected from top to bottom, a glue channel is formed in the interior of the striker rod, a stepped hole is formed in the periphery of the head portion of the striker rod, the stepped hole is communicated with the glue channel in the interior of the striker rod, and the hole diameter gradually decreases from inside to outside.

[0012] Further, the needle is arranged in a funnel shape, and the plug is arranged on the head of the striker rod and arranged in a spherical surface or a conical surface matched with the funnel mouth of the needle.

[0013] A use method of a precise screw valve capable of rapid glue breaking, characterized in that the use method comprises:

[0014] Initially, under the pressing action of the cylinder, the moving assembly drives the screw assembly and the striker to press down the needle, and at this time, the needle is in a closed state and does not discharge glue;

[0015] The cylinder moves upward, the moving assembly drives the screw assembly and the striker to move upward, and at the same time, the servo motor module of the screw assembly is started, the glue liquid enters from the glue inlet head of the screw assembly, then flows into the striker from the outlet, and then flows into the needle from the four small holes in the circumferential direction, and the glue flows out from the bottom of the needle, and the glue dispensing starts;

[0016] When the glue dispensing ends, the screw assembly stops supplying glue, the striker moves downward to drive the plug to quickly block the needle, and the glue is cut off from flowing out of the needle;

[0017] Repeat a working cycle.

[0018] Compared with the prior art, the beneficial effects of the present application are:

[0019] 1. The present application utilizes the cylinder to drive the moving assembly and the striker to reciprocate up and down, and the striker is provided with a plug, so that the opening and closing of the needle can be realized by the up and down movement of the striker, the rapid glue breaking can be realized, the response type of the glue dispensing and the stability of the glue amount are improved, a closed space is formed at the joint of the high-precision screw and the stator, the servo motor module continuously extrudes glue particles by rotating the high-precision screw, and a stable glue discharging effect is formed;

[0020] 2. The striker and the needle are designed in a split type in the present application, which can greatly reduce the processing difficulty and processing cost; and after the needle is worn, the entire striker assembly does not need to be replaced, only the needle needs to be replaced, economic cost is saved, and the service life of the striker is improved;

[0021] 3. The present application is provided with a diaphragm-free pressure sensor at the outlet of the screw, which can accurately detect the outlet pressure of the screw in real time and perform closed-loop control on the outlet pressure;

[0022] 4. The travel of the cylinder can be controlled by adjusting the bolt, and the bolt is limited by the first limiting head and the second limiting head, so that when the bolt is adjusted to the limit, the pressure generated by the bolt will not act on the striker, and the striker can be effectively protected. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structural schematic view of the precise screw valve capable of rapid glue breaking.

[0024] Figure 2 Front view of the moving assembly of the embodiment of the present application;

[0025] Figure 3 Side view of the moving assembly of the embodiment of the present application;

[0026] Figure 4 Front view of the screw assembly of the embodiment of the present application;

[0027] Figure 5 Side view of the screw assembly of the embodiment of the present application;

[0028] Figure 6 Front view of the striker assembly of the embodiment of the present application;

[0029] Figure 7 Sectional view of the first cavity of the embodiment of the present application;

[0030] Figure 8 Structure of the striker of the embodiment of the present application;

[0031] Figure 9 Structure of the plug of the embodiment of the present application;

[0032] Figure 10 Structure of the plug of the embodiment of the present application;

[0033] Figure 11 Structure of the needle of the embodiment of the present application;

[0034] Figure 12 Structure of the needle of the embodiment of the present application.

[0035] Reference signs:

[0036] 1, moving assembly; 2, screw assembly; 3, striker assembly; 4, U-shaped block; 5, cylinder; 6, mounting plate; 7, connecting plate; 8, connecting block; 9, bottom plate; 10, sliding block; 11, guide rail; 12, first limiting head; 13, locking screw; 14, second limiting head; 15, locking nut; 16, bolt; 17, countersunk screw; 18, first exhaust sealing plug; 19, servo motor module; 20, glue inlet head; 21, pressure sensor; 22, second exhaust sealing plug; 23, stator; 24, high-precision screw; 25, plug; 26, needle; 27, universal gas sealing plug; 28, pressing piece; 29, pressing nut; 30, first cavity; 31, striker rod; 32, sealing gasket; 201, outlet; 202, first cylinder; 301, second cylinder; 302, exhaust gap; 303, circular arc groove; 310, tail part; 311, first connecting part; 312, second connecting part; 313, stepped hole; 314, head part; 260, second cavity. DETAILED DESCRIPTION

[0037] In order for those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0038] It should be noted that in the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application; the terms "first", "second", "third" are only for description purposes, and cannot be understood as indicating or implying relative importance, and in addition, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] As Figure 1As shown, the present invention provides a precision screw valve for rapid dispensing of adhesive, including a moving assembly 1, a screw assembly 2, and a firing pin assembly 3. One side of the screw assembly 2 is connected to the moving assembly 1, and an outlet 201 is provided at the bottom of the screw assembly 2. The outlet 201 is coaxially connected to 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 to dispense adhesive.

[0040] like Figures 2-3 As shown, the moving assembly 1 includes a U-shaped block 4, a cylinder 5, a mounting plate 6, a connecting plate 7, a connecting block 8, a base plate 9, a limiting assembly, a slider 10, a guide rail 11, a locking screw 13, an adjusting part, and a countersunk screw 17. The cylinder 5, mounting plate 6, U-shaped plate, and base plate 9 are connected sequentially from top to bottom and are all located on the same central axis. The U-shaped block 4 has a first groove with three opening directions. The first and second directions are relatively parallel and symmetrical, and both are perpendicular to the third direction. The first direction of the U-shaped block 4 connects to the mounting plate 6, the second direction connects to the base plate 9, and the third direction connects to the screw assembly 2. The connecting plate 7 and the connecting block 8 are both located within the first groove, with the connecting plate 7 positioned above the connecting block 8.

[0041] A guide rail 11 and a slider 10 adapted to the guide rail 11 are provided in the first groove of the U-shaped block 4. The connecting block 8 is connected to the slider 10, enabling the connecting block 8 to move up and down within the U-shaped block 4. The cylinder 5 passes through the mounting plate 6, and the connecting plate 7 is connected to the connecting block 8. The connecting plate 7 is provided with a connecting hole, in which a countersunk screw 17 is installed. The cylinder 5 is connected to the connecting plate 7 and the connecting block 8 through the countersunk screw 17. The side of the connecting block 8 closest to the third direction is connected to the screw assembly 2. The cylinder 5 can convert the pressure in the air into mechanical energy, driving the connecting block 8 to reciprocate up and down within the first groove of the U-shaped block 4, and driving the screw assembly 2 to reciprocate up and down through the connecting block 8.

[0042] The mounting plate 6 is provided with adjustment parts on all four sides. The adjustment parts include locking nuts 15 and bolts 16. Bolts 16 pass through the mounting plate 6 and abut against the limiting component. The length of bolts 16 is greater than the thickness of the mounting plate 6. By adjusting bolts 16, the height of the mounting plate 6 on bolts 16 is adjusted, thereby causing the height of cylinder 5 to change. That is, by adjusting bolts 16, the stroke of cylinder 5 is adjusted, thereby indirectly adjusting the stroke of the firing pin.

[0043] The limiting assembly is on the same central axis as the adjusting part and is below the adjusting part. The limiting assembly includes a first limiting head 12 and a second limiting head 14, which are respectively fixed on the upper and lower sides of the connecting plate 7 and penetrate the inside of the connecting plate 7. The first limiting head 12 and the second limiting head 14 are oppositely arranged and abut against each other, and the abutting part is fixed by a locking screw 13. The protruding head 314 of the first limiting head 12 is clamped between the mounting plate 6 and the connecting plate 7, and the protruding head 314 of the second limiting head 14 is clamped between the connecting plate 7 and the connecting block 8, so that a gap is left between the mounting plate 6 and the connecting plate 7 and between the connecting plate 7 and the connecting block 8. In this application, the limiting assembly is arranged in the form of two pairs of lock limiting heads, so that when the bolt 16 is screwed down to the limit, due to the action of the limiting head, the connecting plate 7 will not be pressed, that is, the striker assembly 3 connected below the screw rod assembly 2 will not be subjected to the pressure action of the bolt 16, and the striker can be effectively protected.

[0044] The bottom plate 9 is installed in the second direction of the U-shaped block 4, and the end of the bottom plate 9 close to the screw rod assembly 2 extends out and is provided with a U-shaped notch, the notch direction faces the direction of the screw rod assembly 2, the diameter of the U-shaped notch is matched with the outer diameter of the striker assembly 3, and the U-shaped notch is used for clamping the striker assembly 3 to increase the stability of the striker assembly 3. Threaded holes are arranged around the bottom plate 9, which are used for fixing the precision screw rod valve at the use site.

[0045] As shown in Figures 4-5 The screw rod assembly 2 includes a servo motor module 19, a first cylinder body 202, a first exhaust sealing plug 18, a glue inlet head 20, a pressure sensor 21, a second exhaust sealing plug 22, a high-precision screw rod 24 and a stator 23. The servo motor module 19 is connected to the upper side of the first cylinder body 202, the high-precision screw rod 24 and the stator 23 are arranged in the inside of the first cylinder body 202, the high-precision screw rod 24 is connected to the servo motor above and connected to the stator 23 below, the stator 23 is communicated with the outlet 201 of the first cylinder body 202, the servo motor module 19, the high-precision screw rod 24 and the stator 23 are on the same central axis, the stator 23 is a hollow cylindrical structure, the inner wall of the hollow stator 23 is a corrugated structure, the corrugated structure is matched with the external thread of the high-precision screw rod 24, and during glue discharging, the glue is extruded by the high-precision screw rod 24, that is, the glue liquid enters the closed space formed by the high-precision screw rod 24 and the stator 23, a closed space is formed at the joint of the high-precision screw rod 24 and the stator 23, and the servo motor module 19 continuously extrudes the glue particles by rotating the high-precision screw rod 24, so that a stable glue discharging effect is formed.

[0046] The first cylinder 202 is a prism similar to a cuboid, one side of which is connected with the moving assembly 1, and a pressure sensor 21 is arranged on the bottom of the side of the first cylinder 202 opposite to the moving assembly 1 and close to the outlet 201, a glue inlet head 20 is arranged on the side of the first cylinder 202 adjacent to the moving assembly 1, and a glue channel is formed at the glue inlet head 20, the high-precision screw 24, the stator 23 and the outlet 201, under the action of the servo motor, the glue liquid 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 plunger assembly 3. A first exhaust sealing plug 18 is arranged on the side of the first cylinder 202 opposite to the glue inlet head 20, and a cavity flow channel exists between the first cylinder 202 and the high-precision screw 24 and the stator 23, the air in the cavity flow channel in the first cylinder can be exhausted by arranging the first exhaust sealing plug 18, the pressure balance inside and outside the first cylinder 202 is realized, and the unstable flow of the glue liquid caused by the pressure in the first cylinder 202 is avoided.

[0047] The pressure sensor 21 is a diaphragm-free pressure sensor 21, which has the advantages of high frequency response, small volume, low power consumption, high sensitivity and good precision, and by arranging the pressure sensor 21 near the outlet 201, the pressure of the screw outlet 201 can be accurately detected in real time, and closed-loop control is performed thereon, so that the dispensing accuracy is improved. The side of the pressure sensor 21 away from the first cylinder 202 is provided with a second exhaust sealing plug 22, which is in communication with the inside of the pressure sensor 21 and is used for exhausting the air in the flow channel of the pressure sensor 21 to avoid the air pressure difference in the inside of the pressure sensor 21 affecting the accuracy of the pressure sensor 21.

[0048] As shown in Figures 6-10 The plunger assembly 3 includes a second cylinder 301, a plug 25, a needle 26, a gas sealing plug 27, a pressing sheet 28, a pressing nut 29, a first cavity 30, a plunger rod 31 and a sealing gasket 32. The second cylinder 301 is T-shaped and is clamped in the U-shaped notch of the bottom plate 9 and is fixed with the bottom plate 9 through a threaded structure. A second recess is formed downward in the center of the second cylinder 301, the second recess is cylindrical, the opening direction is upward, and the height of the second recess is less than the height of the second cylinder 301. The plunger rod 31 is inserted into the center of the second recess and penetrates downward through the second cylinder 301, and a channel for the flow of glue is arranged in the inside of the plunger rod 31.

[0049] The firing pin rod comprises a tail portion 310, a first connecting portion 311, a second connecting portion 312 and a head portion 314, which are sequentially connected from top to bottom and located on the same central axis, 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 firing pin rod 31 is internally provided with a glue passage, the head portion 314 of the firing pin rod 31 is circumferentially provided with a stepped hole 313, the stepped hole 313 is communicated with the internal glue passage of the firing pin rod 31, and the head portion 314 of the firing pin rod 31 is provided with a plug 25, which is arranged below the stepped hole 313.

[0050] The tail portion 310 of the firing pin rod 31 protrudes above the second cylinder body 301, the shape of the tail portion 310 is matched with the outlet 201 of the screw assembly 2, which is used to connect the screw assembly 2, so that the glue liquid in the stator 23 can flow to the inside of the firing pin rod 31 through the outlet 201, the outlet 201 of the screw assembly 2 is coaxially connected with the firing pin assembly 3, which has the characteristics of short passage and small resistance, and can promote the smooth flow of the glue liquid. The tail portion 310 is sleeved with a sealing gasket 32 below, the sealing gasket 32 can seal the connection between the firing pin assembly 3 and the screw assembly 2, and the height of the sealing gasket 32 is slightly higher than that of the second cylinder body 301, so that a gap is left between the screw assembly 2 and the second cylinder body 301, so that the air in the second cylinder body 301 can be discharged to the outside through the gap.

[0051] The outer shape of the first connecting portion 311 is arranged in a stepped shape, the first connecting portion 311 and the second connecting portion 312 form a stepped exhaust gap 302 with the second groove, and the above-mentioned arrangement of the stepped exhaust gap 302 can further improve the exhaust effect. The second cylinder body 301 and the second groove form a first cavity 30, and a circular arc groove 303 is arranged on the side close to the second connecting portion 312 in the first cavity 30, which is communicated with the exhaust gap 302 in the second groove, and the above-mentioned arrangement can discharge the generated air pressure to the outside through the circular arc groove 303 and the exhaust gap 302 when the firing pin rod 31 moves up and down, thereby avoiding affecting the movement of the firing pin rod 31.

[0052] The bottom of the second barrel body 301 protrudes downward, the protruding part has the same diameter as the needle head 26, the bottom of the second barrel body 301 abuts against a pressing plate 28, the pressing plate 28 is located between the second barrel body 301 and the needle head 26, the pressing plate 28 surrounds the head part 314, and the distance between the bottom of the second connecting part 312 and the pressing plate 28 is greater than the distance between the plug 25 and the opening of the needle head 26. The second barrel body 301, the pressing plate 28 and the needle head 26 are fixedly connected through a pressing nut 29, the needle head 26, the pressing plate 28 and the second barrel body 301 are fixedly connected to the bottom plate 9 of the moving assembly 1, the fixed connection of the needle head 26 realizes point gluing at a fixed point, is not affected by the stability of the plunger rod 31, and the accuracy of point gluing is improved; the pressing plate 28 plays a buffering role, prevents the plunger rod 31 from directly impacting the needle head 26, and prevents damage.

[0053] The head part 314 is sleeved with a gas sealing plug 27, the gas sealing plug 27 can realize sealing of the inside of the needle head 26 when the plug 25 blocks the needle head 26 downward, has high sealing pressure, can quickly break glue, and avoids dripping of glue; a plurality of stepped holes 313 are arranged in the plunger rod 31 in a circumferential direction, and glue in the plunger rod 31 can flow into the needle head 26 through the stepped holes 313. The stepped holes 313 are located between the gas sealing plug 27 and the plug 25, the diameters of the stepped holes 313 gradually decrease from inside to outside, and the resistance of glue can be minimized.

[0054] The plunger rod 31 and the plug 25 form a plunger, and the plunger is inserted into the inside of the needle head 26. Compared with an integrated design, the needle head 26 and the plunger are designed in a split type, the plunger rod 31 is made of stainless steel, the plug 25 is made of tungsten steel or ceramic and the like, has high hardness and high wear resistance, can greatly reduce processing difficulty and processing cost, the needle head 26 is detachably fixed to the outside of the plunger through the pressing nut 29, after the needle head 26 is worn, the entire plunger assembly 3 does not need to be replaced, only the needle head 26 needs to be replaced, economic cost is saved, and the service life of the plunger is improved.

[0055] The needle head 26 is clamped to the outside of the gas sealing plug 27, the lower part of the needle head 26 is provided in a funnel shape, the needle head 26 is provided with a second cavity 260, the second cavity 260 is located below the gas sealing plug 27 and has a downward opening direction, the lower part of the second cavity 260 is also provided in a funnel shape, the bottom of the second cavity 260 is a glue outlet, the plunger rod 31 is inserted into the second cavity 260, and the diameter of the plunger rod 31 is less than the diameter of the second cavity 260.

[0056] The plug 25 can be provided as a spherical surface in line contact with the funnel mouth of the second cavity 260 or a conical surface in surface contact. The plug 25 and the striker rod 31 are connected to form a striker, and the opening and closing of the needle 26 are realized by the up-down movement of the striker. Specifically, the striker is driven by the cylinder 5 to move up and down. When moving upward, the plug 25 is separated from the funnel mouth, and the adhesive in the striker rod 31 is retained in the needle 26 through the stepped hole 313, and then flows out through the glue outlet to carry out dispensing. When the dispensing is completed, the cylinder 5 drives the striker to press down, and the plug 25 blocks the funnel mouth in the second cavity 260, so that the adhesive cannot flow out of the funnel mouth, and the dispensing is stopped.

[0057] As shown in the drawings, Figures 11-12 The present application provides a method for using a precise screw valve capable of quickly stopping dispensing. In the initial state, the cylinder 5 drives the screw assembly 2 and the striker to press down the funnel mouth of the second cavity 260 in the needle 26 through the connecting block 8 on the moving assembly 1 under the pressing action of the cylinder 5, and at this time, the needle 26 is in a closed state and does not dispense adhesive. When the cylinder 5 moves upward, the moving assembly 1 drives the screw assembly 2 and the striker to move upward, and at the same time, the servo motor module 19 in the screw assembly 2 is started. The adhesive enters the screw assembly 2 from the glue inlet 20, passes through the screw and the stator 23, and then flows into the striker from the outlet 201 of the screw assembly 2, and then flows into the needle 26 from the stepped hole 313 on the striker rod 31. The adhesive flows out of the glue outlet, and the dispensing starts. When the dispensing is completed, the screw assembly 2 stops supplying adhesive, and the striker moves downward to quickly block the needle 26, so that the adhesive cannot flow out of the needle 26, and the dispensing is quickly stopped. The above working cycle is repeated to carry out dispensing.

[0058] It should be understood that the structures, proportions, sizes, etc. shown in the drawings of the present application are only used to cooperate with the disclosed content, so that those skilled in the art can understand and read, and are not used to limit the implementation conditions of the present application. Therefore, any modification of the structure, change of the proportion relationship or adjustment of the size, which does not affect the effect and purpose of the present application, should still fall within the scope of the disclosed technology.

[0059] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions described in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A precision screw valve with quick break glue, characterized in that, The application relates to a glue injection device which comprises a moving assembly (1), a screw rod assembly (2) and a striker assembly (3); the screw rod assembly (2) is connected with the moving assembly (1) at the side wall and connected with the striker assembly (3) at the bottom; the screw rod assembly (2) is provided with a glue inlet head (20) and an outlet (201) which are communicated with each other to form a glue channel; the outlet (201) is located at the bottom of the screw rod assembly (2) and coaxially connected with the striker assembly (3); a pressure sensor (21) is arranged at one side of the bottom of the screw rod assembly (2); the pressure sensor (21) is used for detecting the pressure at the outlet (201); the striker assembly (3) comprises a striker which is composed of a striker rod (31) and a plug (25); the moving assembly (1) drives the screw rod assembly (2) and the striker to move up and down. The moving assembly (1) comprises a 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 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 located in the U-shaped groove of the U-shaped block (4); the connecting plate (7) is provided with a connecting hole; the 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); the screw rod assembly (2) is fixedly connected with the side wall of the connecting block (8). The limiting assembly comprises first limiting heads (12) and second limiting heads (14); the first limiting heads (12) and the second limiting heads (14) are fixed on the upper and lower sides of the connecting plate (7) respectively and penetrate through the inside of the connecting plate (7); the first limiting head (12) and the second limiting head (14) abut on one side. Adjusting parts are protrusively arranged around the mounting plate (6); the adjusting parts comprise locking nuts (15) and bolts (16); the bolts (16) penetrate through the mounting plate (6) and abut on the limiting assembly; the length of the bolts (16) is greater than the thickness of the mounting plate (6); the stroke of the cylinder (5) can be adjusted through the adjusting parts.

2. A precision screw valve according to claim 1, wherein The screw rod assembly (2) further comprises a servo motor module (19) and a first cylinder (202); the upper part of the first cylinder (202) is connected with the servo motor module (19); the first cylinder (202) is provided with a high-precision screw rod (24) and a stator (23) which are sequentially connected in the center; the glue inlet head (20), the high-precision screw rod (24) and the stator (23) form a glue channel; the pressure sensor (21) is located at the bottom of the first cylinder (202) on the side far away from the moving assembly (1); the first cylinder (202) is provided with a first exhaust sealing plug (18) on the side opposite to the glue inlet head (20); the side far away from the first cylinder (202) of the pressure sensor (21) is provided with a second exhaust sealing plug (22).

3. A precision screw valve according to claim 1, wherein The needle assembly (3) further comprises a second cylinder (301) and a needle head (26), the second cylinder (301) is T-shaped, one end of the second cylinder (301) is fixedly connected to the moving assembly (1), the other end is connected with the needle head (26), and the needle head (26) is funnel-shaped; the striker penetrates through the second cylinder (301), one end of the striker protrudes from the second cylinder (301) and is connected with the screw rod assembly (2), and the other end is inserted into the needle head (26).

4. A precision screw valve according to claim 3, wherein The second cylinder (301) is provided with a second groove in the center, the striker is inserted into the center of the second groove, and a stepped exhaust gap (302) is formed between the striker and the second groove; a first cavity (30) is formed between the second cylinder (301) and the second groove, a circular arc groove (303) is formed on one side of the first cavity (30) close to the striker rod (31), and the circular arc groove (303) is communicated with the exhaust gap (302).

5. A precision screw valve according to claim 3, wherein The striker rod (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 striker rod (31), a stepped hole (313) is formed in the circumferential direction of the head portion (314) of the striker rod (31), the stepped hole (313) is communicated with the glue channel in the striker rod (31), and the hole diameter gradually decreases from inside to outside.

6. A precision screw valve according to claim 5, wherein, The head portion (314) is provided with a plug (25), and the plug (25) is provided with a spherical surface or a conical surface matched with the funnel mouth of the needle head (26).

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