CN210045487U

CN210045487U - Self-plugging dispensing valve

Info

Publication number: CN210045487U
Application number: CN201920495478.4U
Authority: CN
Inventors: 黄焰君
Original assignee: Shenzhen Miqing Technology Co Ltd
Current assignee: Shenzhen Miqing Technology Co Ltd
Priority date: 2019-04-12
Filing date: 2019-04-12
Publication date: 2020-02-11
Anticipated expiration: 2029-04-12

Abstract

The utility model discloses a from stopper dispensing valve belongs to glue, pastes the control technical field of easy solidification liquid such as agent, encapsulation liquid. The pedestal is glued to point is equipped with valve, point and glues passageway and flow size adjustment mechanism, the point is glued the head and is fixed in point and is glued pedestal bottom and point passageway intercommunication, the outside of gluing the pedestal is equipped with and is used for injecting the gluey hole, inject gluey hole and valve control mechanism intercommunication, valve control mechanism includes that cylinder body and cylinder cap both hold chamber cooperation sealing washer lid and close, this body coupling of cylinder body and point gluing control, the piston divide into epicoele and cavity of resorption with the appearance chamber of cylinder body, the cylinder body is equipped with outward and is equipped with the scavenge port with the resorption adjusting part and the cavity of epicoele intercommunication, the firing pin of valve in the piston intracavity and the control point gluey pedestal of control point, the firing pin passes the cylinder body bottom and inserts the. Compared with the prior art, the self-plugging dispensing valve has the advantages that the cylinder piston is pushed to move downwards by air pressure, the piston drives the firing pin, the whole self-plugging dispensing valve is compact in structure, convenient to assemble and maintain, high-pressure resistant, corrosion resistant, micro-leakage resistant, durable and the like, and are greatly improved compared with the traditional dispensing valve.

Description

Self-plugging dispensing valve

Technical Field

The utility model relates to a control technical field of easy solidification liquid such as glue, paste agent, encapsulation liquid also includes the control of non-easy solidification liquid certainly, specifically is a from dispensing valve.

Background

With the development of various industries, such as 3C consumer electronics, automotive electronics and components, photoelectric industry, biochemical industry, photovoltaic solar industry, surface mount semiconductor manufacturing industry, LCD/LED, electronic component industry, semiconductor packaging, fixing and protecting of PCB electronic parts, bonding of LCD glass machine plate packaging, coating of mobile phone plate or key-press dispensing, speaker dispensing, battery box dispensing and sealing, coating and bonding of hardware parts with fixed amount of gas, liquid filling and coating, and chip bonding, the demand of people on the dispensing quality process is increasing.

The existing common glue dispensing valve has the following main problems:

1. poor high pressure resistance;

2. the corrosion resistance is poor;

3. the leakage phenomenon is more, the sealing ring is frequently replaced, and the leakage phenomenon is more serious along with the increase of the liquid pressure field strength;

4. incomplete function, such as high pressure resistance without suck back or with suck back but not high pressure resistance;

5. after the valve body is used for a period of time, the flow rate is slowly increased, and the adjustment is uneven.

SUMMERY OF THE UTILITY MODEL

To the problem, the utility model provides a from dispensing valve, new valve injecting glue mouth and high-low pressure field intensity sealing mode isotructure improvement have improved the comprehensive properties of valve body, possess anti high pressure simultaneously, take the resorption (resorption volume size is adjustable), stable flow size regulation, leakage, long service life, spatial structure are little etc. than traditional dispensing valve performance and improve greatly.

In order to achieve the above object, the utility model provides a following technical scheme: a self-plugging dispensing valve comprises a dispensing seat body, a valve control mechanism, a sealing control mechanism, a dispensing head and a piston cavity, wherein the dispensing seat body is provided with a valve, a dispensing channel and a flow regulating mechanism, the dispensing head is fixed at the bottom of the dispensing seat body and communicated with the dispensing channel, the outside of the dispensing seat body is provided with a hole for injecting glue, the glue injection hole is communicated with a valve control mechanism, the valve control mechanism comprises a cylinder body and a cylinder cover, the two cavities are matched with a sealing ring to cover, the cylinder body is connected with the dispensing control body, a piston is arranged in the cylinder body, the piston divides a containing cavity of the cylinder body into an upper cavity and a lower cavity, a back suction adjusting component communicated with the upper cavity is arranged outside the cylinder body, a vent hole is arranged in the lower cavity, a firing pin used for controlling a valve in the dispensing seat body is arranged in the piston cavity, the firing pin fixes the gasket and the piston spring of the lower cavity of the piston, penetrates through the bottom of the cylinder body and is inserted into a sealing ring of the dispensing control body to be connected.

Preferably, the self-plugging dispensing valve further comprises a flow regulating mechanism for regulating the dispensing amount, the flow regulating mechanism is formed by connecting and combining a flow regulating cover, a flow regulating core, a flow regulating gasket and a flow regulating sealing ring, the flow regulating core can be screwed by a straight screwdriver to regulate the position of the flow regulating core, the flow of the glue injected from the glue injection port is regulated, although the flow regulating mechanism is the same as the valve control mechanism and is arranged in the glue injection high-pressure field intensity, the flow regulating mechanism and the valve control mechanism can bear the glue injection liquid high-pressure field intensity simultaneously, and the self-plugging dispensing valve has the advantages that the dispensing flow can be regulated, and the sealing effect is greatly superior to that of the existing dispensing valve.

Preferably, the combined mode of the dispensing control body and the sealing mechanism only bears low-voltage field intensity.

Preferably, during the wire drawing of the needle head part, namely glue dispensing, glue is residual and adheres to the needle nozzle, the produced product is possibly polluted, the product quality is influenced, the resorption adjusting mechanism is arranged at the top of the cylinder cover, the rising height of the piston in the cylinder is used for determining the resorption amount, the resorption amount can be adjusted according to the viscosity characteristic of the used glue, and the problems of the wire drawing of the glue and the residual glue at the needle head part are reduced or avoided.

Preferably, the dispensing valve has the functions of high pressure resistance, flow rate regulation, suck-back quantity regulation, micro leakage, corrosion resistance and durability.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model provides a pair of from stopper dispensing valve possesses anti high pressure simultaneously, takes the resorption (resorption volume size adjustable), and functions such as stable flow size regulation, utmost point leak, long service life, spatial structure are little. The dispensing valve adopts a firing pin, the valve switch of the valve body is controlled, the firing pin is pushed by air pressure and a spring to move up and down, the response speed is high, no glue is left on the needle head, and the glue is discharged uniformly; the glue outlet amount can be manually controlled by adjusting the sub-heads (the glue outlet amount after adjustment is very stable and uniform; and the whole self-plugging glue dispensing valve has small volume, compact structure and convenient assembly and maintenance.

Drawings

1) Fig. 1 is a perspective view and an exploded view of a self-plugging dispensing valve provided by the present invention;

2) fig. 2 is a front view and a front cross-sectional view of a self-plugging dispensing valve provided by the present invention;

3) fig. 3 is a side view and a cross-sectional side view of a self-plugging dispensing valve provided by the present invention;

4) FIG. 4 is a schematic view of the pressure field strength of the self-plugging dispensing valve;

5) FIG. 5 is a graph showing the field strength of a conventional dispensing valve;

6) fig. 4 and 5 are schematic diagrams for comparing and analyzing the new dispensing valve pressure field strength and the old dispensing valve pressure field strength.

Reference numbers in the figures: 10. a suck-back adjustment mechanism; 101. a suck-back adjusting nut; 102. a suck-back adjusting positioning nut; 103. an air inlet hole of the cylinder; 104. a suck-back adjusting lever; 20. a cylinder cover; 30. a cylinder body; 301. an upper chamber; 302. a piston guide ring; 303. a striker; 304. a ventilation hole; 305. an O-shaped sealing ring; 306. a striker fixing fixed gasket; 307. a piston body; 308. a lower cavity; 309. a piston spring; 40. dispensing control body; 401. a striker guide ring; 402. a flow control body; 403. a V-shaped sealing ring; 404. SEAT sealing ring; 405. the V-shaped sealing ring fastens the adjusting nut; 406. a dispensing valve body mounting fixing hole; 50. a glue dispensing base body; 501. injecting glue holes; 502. a valve; 503. a valve spring; 504. a flow regulating cover; 505. a flow regulating core; 506. a flow regulating gasket; 507. a conical seal ring; 508. a glue outlet channel; 60. a dispensing needle mounting mechanism; 601. a dispensing head sealing ring; 602. dispensing a glue head; 603. a dispensing needle head fixing seat; 604. and a glue outlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: fig. 1, 2 to 3 illustrate a preferred embodiment of a self-plugging dispensing valve according to the present invention. As shown in fig. 1, 2 to 3, the self-plugging dispensing valve includes a suck-back adjusting mechanism 10, a cylinder cover 20, a cylinder 30, a dispensing control body 40, a dispensing seat body 50, and a dispensing needle mounting mechanism 60, and controls the valve of the dispensing seat body 50 to perform a dispensing opening and closing operation through the cooperation (connection is a sealing cover) of the dispensing

valve bodies

10, 20, 30, and 40.

As shown in fig. 1, 2 and 3, the dispensing valve includes a dispensing seat body 50, a dispensing needle mounting mechanism 60, the dispensing seat body 50 is provided with a dispensing hole 501, a valve 502, a valve spring 503, a flow adjusting cover 504, a flow adjusting core 505, a flow adjusting gasket 506, a conical sealing ring 507 and a dispensing channel 508, the dispensing needle mounting mechanism 60 includes a dispensing head 602 and a dispensing needle fixing seat 603, the dispensing head 602 is fixed at the bottom of the dispensing seat body 50, the joint is sealed by the dispensing head sealing ring 601, when the dispensing opening 501 is filled with glue and the valve 502 is opened, the glue flows into an external dispensing needle from a dispensing opening 604 through the dispensing channel 508 for dispensing, the dispensing amount during dispensing operation can be adjusted by turning the flow adjusting core 505 with a straight screwdriver to move left and right to engage or disengage with or disengage from a central hole of the dispensing hole, the closer the flow regulating core 505 is to the glue injection hole 501, the smaller the glue outlet flow rate is, and on the contrary, the larger the glue outlet amount is.

The suck-back adjusting mechanism 10 of the dispensing valve, the cylinder cover 20, the cylinder body 30, the dispensing control body 40 are matched and sealed to cover, the dispensing control body 40 is connected with the dispensing seat body 50, a piston assembly is arranged in the cylinder body 30, wherein the piston body 306 divides the cavity of the cylinder body 30 into an upper cavity 301 and a lower cavity 308, the suck-back adjusting mechanism 10 comprises a suck-back adjusting nut 101, a suck-back adjusting positioning nut 102 and a suck-back adjusting rod 104, the top of the suck-back adjusting rod 104 is provided with a cylinder air inlet hole 103, the side of the cylinder body 30 is provided with a ventilation hole 304, the bottom of the piston body 306 is connected with a striker 303 for controlling the opening and closing of the valve 502, the striker 303 passes through the bottom of the cylinder body 30 and is inserted into a striker guide ring 401 to fasten the adjusting nut 405 and a V-shaped sealing ring 403 with a V-shaped sealing ring in the dispensing control body, injecting air into the upper chamber 301 to push the piston body 306 to move downward (the air in the lower chamber 308 is exhausted from the ventilation hole 304), moving the striker 303 at the bottom of the piston body 306 downward, pushing the valve 502 in the dispensing seat body 50 through the striker guide ring 401 and the striker 303 of the V-shaped sealing ring fastening adjusting nut 405 and the V-shaped sealing ring 403 in the dispensing control body 40, and allowing the glue injected from the glue injection hole 501 of the dispensing seat body 50 to enter the glue outlet channel 508 through the valve 50 and enter the glue inlet needle from the glue outlet 604 of the glue dispensing head 602 to perform the glue dispensing operation; when the air injection into the upper cavity 301 of the cylinder 30 is stopped, the striker 303 is moved upward by the force of the piston spring 309 (air flows into the lower cavity 308 of the cylinder 30 from the ventilating hole 304) and is separated from the valve 502, and the valve 50 is moved upward by the force of the valve spring 503 and is blocked by the middle hole of the SEAT sealing ring 404, so that the glue is not communicated with the glue outlet channel 508, and the glue dispensing is stopped.

A piston spring 309 which is mutually extruded with the piston body 306 is also arranged in the cylinder body 30, and the piston spring 309 is positioned in the cylinder body lower cavity 308, so that the piston body 306 is in an extruded state; it is worth noting that: the piston body 306, the firing pin 303, the firing pin fixing gasket 305 and the piston spring 309 are connected in a combined and superposed structure, screws are not needed for fastening connection, assembly and maintenance are very simple and convenient, the piston body 306 is combined with the piston guide ring 302 and the O-shaped sealing ring 305 to seal the piston, the piston guide ring 302 plays a role in guiding the piston and ensures that the piston does not shake when moving up and down, the piston guide ring 302 is made of a teflon material which is wear-resistant, high-temperature-resistant, corrosion-resistant and strong in self-lubricating property, wear of the piston body 306 and the O-shaped sealing ring 305 with the cylinder body 30 in the using process is greatly reduced, and the service life is prolonged.

The cylinder cover 20 is hermetically connected with the suck-back adjusting rod 104 and the suck-back adjusting fastening nut 102, when the suck-back adjusting nut 101 rotates left and right, the flow adjusting rod 104 moves up and down, and the distance of the up and down movement of the firing pin 303 connected with the piston body 306 is further controlled to adjust the glue suck-back amount; the smaller the upward movement distance of the firing pin 303 is, the smaller the suck-back amount is, the larger the upward movement distance of the firing pin 303 is, and the larger the suck-back amount is, so that the problem of wire drawing caused by different glue viscosity characteristics in the operation process can be solved.

Fig. 4 and 5 show that the pressure field strength of glue applied to the new and old dispensing valves in a non-operating state and an operating state is respectively A1, B1 and A2, wherein A1 and A2 are high-pressure field, and B1 is low-pressure field; the leakage of the traditional glue dispensing valve is represented by high-pressure field strength in the using process, so that the sealing position is not resistant to the leakage of high-pressure field strength, namely, in fig. 5, the sealing ring 1 and the sealing ring 2 are subjected to the same high-pressure field strength A2, the high-pressure field strength A2 is the same as the glue injection pressure, and after the glue dispensing valve is used for a period of time, the sealing ring 2 has larger abrasion (rubs with a firing pin for a long time), so that the glue leakage is easy to occur. In fig. 4, the high-pressure field a1 in the self-plugging glue valve is sealed by the valve 502 and the seat sealing ring which do not generate dynamic friction, and the flow regulating assembly is also sealed, so that no abrasion phenomenon occurs, that is, glue leakage does not occur in a non-operation state; during the dispensing operation of the self-plugging dispensing valve, after the valve 502 is pushed open by the striker 303, the glue flows from the high-pressure field a1 to the glue outlet channel 508 (the arrow direction indicates the glue flowing direction), and the glue outlet channel 508 is communicated with the low-pressure field B1, that is, after the glue flows from the high-pressure field a1 to the B1, the pressure generated by the glue is released, that is, although the V-shaped sealing ring and the striker 303 generate dynamic friction, the glue flows out from the glue outlet 604 under the low-pressure field B1, and the glue leakage phenomenon hardly occurs at the V-shaped sealing ring in the dispensing operation process; therefore, the self-plugging dispensing valve has the advantages of no leakage in the non-dispensing operation state and possible tiny leakage in the dispensing operation state.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A self-plugging dispensing valve comprises a dispensing seat body, a valve control mechanism, a sealing control mechanism, a dispensing head and a piston cavity, and is characterized in that the dispensing seat body is provided with a valve, a dispensing channel and a flow rate adjusting mechanism, the dispensing head is fixed at the bottom of the dispensing seat body and is communicated with the dispensing channel, a dispensing hole is formed in the outer side of the dispensing seat body and is communicated with the valve control mechanism, the valve control mechanism comprises a cylinder body and a cylinder cover, the cylinder body is matched with a sealing ring to cover, the cylinder body is connected with the dispensing control body, a piston is arranged in the cylinder body, the piston structure is of a superposed type and is tightly connected with the piston body, a firing pin fixing gasket and a piston spring without screws; the piston divides into epicoele and cavity of resorption with the appearance chamber of cylinder body, the cylinder body is equipped with the resorption adjusting part and the cavity of resorption that communicate with the epicoele outward and is equipped with the scavenge port, the firing pin of valve in the piston intracavity and the seat that is used for controlling the point gum, the piston spring of firing pin fixed shim and piston lower chamber, the firing pin passes the cylinder body bottom and inserts the sealing washer of point gum control body and connects.

2. A self-plugging dispensing valve in accordance with claim 1, wherein: the self-plugging dispensing valve also comprises a flow regulating mechanism for regulating the dispensing amount, wherein the flow regulating mechanism is formed by connecting and combining a flow regulating cover, a flow regulating core, a flow regulating gasket and a flow regulating sealing ring, the flow regulating core can be screwed by a straight screwdriver to regulate the position of the flow regulating core, and the flow of glue injected from a glue injection port is regulated.

3. A self-plugging dispensing valve in accordance with claim 1, wherein: the combined mode of the dispensing control body and the sealing mechanism only needs to bear low-voltage field intensity, and has the advantages that the dispensing valve does not leak in a non-dispensing operation state, and the leakage phenomenon of glue during dispensing operation is very small.

4. A self-plugging dispensing valve in accordance with claim 1, wherein: the cylinder cover top is equipped with resorption adjustment mechanism, and the piston height that rises in the cylinder body determines the size of resorption volume, can be according to the glue viscosity characteristic that uses, adjusts the height that the piston rises, the size of glue resorption volume promptly, reduces or avoids the emergence of glue wire drawing, the residual glue problem in syringe needle portion.

5. A self-plugging dispensing valve according to claim 1, 2, 3 or 4 wherein: the dispensing valve has the functions of high pressure resistance, corrosion resistance, back suction, stable flow regulation, micro leakage, long service life, small space structure and the like.