CN113828483B

CN113828483B - Dispensing valve for dispensing machine

Info

Publication number: CN113828483B
Application number: CN202111231329.5A
Authority: CN
Inventors: 陈王强
Original assignee: Hubei Deqing Medical Precision Electronic Technology Co ltd
Current assignee: Hubei Deqing Medical Precision Electronic Technology Co ltd
Priority date: 2021-10-22
Filing date: 2021-10-22
Publication date: 2022-07-05
Anticipated expiration: 2041-10-22
Also published as: CN113828483A

Abstract

The invention relates to the field of dispenser equipment, and discloses a dispensing valve for a dispenser, which comprises a valve body, wherein a feed inlet is arranged on one side of the middle part of the valve body, a glue input pipe communicated with the feed inlet is arranged on the side surface of the valve body, a one-way valve is arranged on the glue input pipe, a needle cylinder is arranged at the bottom of the valve body, a glue dripping groove communicated with the feed inlet is formed in the needle cylinder, a cylinder is arranged at the top of the valve body, a push pipe is arranged in the cylinder, the push pipe is movably sleeved with the push pipe through a pneumatic piston, and a suck-back sealing partition pipe fixedly sleeved at the bottom end of the push pipe is matched, when a workpiece is subjected to dispensing work, the inner cavity of the push pipe forms negative pressure by utilizing the downward movement of the pneumatic piston, glue in the glue dripping groove is prevented from dripping and drawing wires after the glue is dripped, the product quality is ensured, and when the pneumatic piston moves upwards to extract the glue, the outside air is prevented from entering from the glue dripping groove to cause that the extraction amount of the glue is lower, thereby causing the problem of poor glue dripping precision every time.

Description

Dispensing valve for dispensing machine

Technical Field

The invention relates to the field of dispenser equipment, in particular to a dispensing valve for a dispenser.

Background

The dispensing machine is an automatic machine which is specially used for controlling fluid, dropping and coating the fluid on the surface of a product or inside the product, and is also called a glue spreader, a glue dispenser, a glue pouring machine and the like, a dispensing valve is one of necessary equipment components in the dispensing machine, the glue dispensing amount of each dispensing is controlled through the dispensing valve, wherein, a pneumatic dispensing valve is a common one, the pneumatic dispensing valve is filled into a pressure barrel through glue, compressed air enters the pressure barrel (storage barrel), the glue is pressed into a feeding pipe connected with a cylinder chamber, a piston is driven to move up and down through air supply, the glue enters a cylinder, and the glue is pressed out from a needle head to perform dispensing.

However, the problem that the existing dispensing valve often has glue remaining on the needle after dispensing and wire drawing during dispensing is often the problem when dispensing, glue is remained on the needle, part can drip on the product due to gravity action, influence the problem of product quality easily, and the existing resorption formula dispensing valve shifts up the mode of stopping glue injection through the piston, add the problem that negative pressure equipment prevents that the glue drips and falls the wire drawing in the needle tubing, extra energy consumption is higher, and it moves down through the piston, dropwise add glue by the pressure supply of glue bucket, make the precision influence factor of every glue water droplet addition still influenced by the pressure of glue bucket, thereby the accuracy of glue dropwise add at every turn has been reduced.

Disclosure of Invention

The invention provides a glue dispensing valve for a glue dispenser, which has the advantages of higher glue dripping accuracy and lower energy consumption and solves the technical problems in the background art.

In order to realize the purpose, the invention provides the following technical scheme to realize the purpose: a dispensing valve for a dispenser comprises a valve body, wherein a feed inlet is arranged on one side of the middle part of the valve body, a glue input pipe communicated with the feed inlet is arranged on the side surface of the valve body, a one-way valve is arranged on the glue input pipe, a needle cylinder is arranged at the bottom of the valve body, a glue dripping groove communicated with the feed inlet is formed in the needle cylinder, a cylinder is arranged at the top of the valve body, a push pipe is arranged in the cylinder, the bottom end of the push pipe extends into the valve body and is fixedly connected with a resorption sealing partition pipe, the resorption sealing partition pipe can seal the glue dripping groove, a pneumatic piston is movably sleeved at the top end of the push pipe and can move upwards along with the pneumatic piston, the pneumatic piston is movably sleeved with the inner wall of the cylinder, an air inlet groove positioned below the pneumatic piston is formed in the cylinder, and when the pneumatic piston is positioned at the bottommost part of an inner cavity of the cylinder, a cavity above the pneumatic piston in the cylinder can be in a negative pressure pumping state, the push pipe comprises a push pipe body and is characterized in that through holes are formed in two sides of the top end of the push pipe body, the height value of each through hole is smaller than that of the binding face of a pneumatic piston and the push pipe, a second spring is arranged between the tops of inner cavities of the pneumatic piston and an air cylinder, a piston cavity is formed in the joint of the valve body and the air cylinder, the piston cavity is communicated with the inner portion and the feed inlet of the valve body, a first spring movably sleeved on the outer side of the push pipe is arranged in the piston cavity, and the bottom end of the first spring is connected with a sealing piston fixedly sleeved on the push pipe.

Optionally, a positioning threaded sleeve is sleeved on the top end of the air cylinder in a threaded manner, an adjusting threaded shaft is sleeved on the middle portion of the positioning threaded sleeve in a threaded manner, and the second spring is arranged between the adjusting threaded shaft and the pneumatic piston.

Optionally, a limit plug is fixedly sleeved at the top end of the push pipe, the limit plug seals the top end of the push pipe, and the diameter value of the limit plug is larger than the outer diameter value of the push pipe.

Optionally, a sealing layer is arranged at the joint of the push pipe and the inner wall of the cylinder, and a sealing layer is arranged at the joint of the cylinder and the valve body.

Optionally, the bottom fixed cover that the back suction sealed separates the pipe has connect the location stopper, the diameter value of location stopper is greater than the internal diameter value that drips the gluey groove, and the back suction seals the outside that separates pipe, location stopper and the inner wall contactless of valve body, and the middle part of location stopper has been seted up middle logical groove, and the inside movable sleeve that the back suction sealed separates the pipe is equipped with piston slider, and the outside of piston slider and the back suction seal the inner wall that separates the pipe laminate completely, and piston slider's top and the back suction seal separate the pipe inner chamber the top and be equipped with the magnetic ring respectively, and the opposite face magnetic pole of two magnetic rings is the same.

The invention provides a dispensing valve for a dispensing machine, which has the following beneficial effects:

1. this a dispensing valve for point gum machine, through the design that pneumatic piston cup jointed with the ejector sleeve activity, the resorption that cooperation ejector sleeve bottom end fixed cup jointed seals the partition pipe, when carrying out some glue work to the work piece, utilize moving down of pneumatic piston to make the ejector sleeve inner chamber form the negative pressure, prevent the glue dripping inslot glue dripping wire drawing behind the dropwise add glue, when ensuring product quality, when moving up the extraction glue at pneumatic piston, avoid the outside air to get into by the glue dripping groove department, lead to the glue extraction volume lower, thereby lead to the relatively poor problem of every dropwise add glue volume precision, the quality of product has further been ensured, and need not additionally to add the suction drive device, the energy consumption has been saved, the waste of resorption sizing material has still been avoided.

2. This a dispensing valve for point gum machine, through moving down of air piston release the sizing material and carry out the glue dripping, compare in current dispensing valve and adopt air piston to shift up, the mode of the pressure feed dropwise add glue that utilizes the sizing barrel, the dropwise add volume is not influenced by the pressure that the sizing barrel supplied with, make the precision influence factor of glue water dropwise add volume at every turn reduce, thereby corresponding improvement the accuracy of glue dropwise add, and then the quality of guarantee product, and simultaneously, the energy consumption that the sizing barrel lasts the pressure that supplies has been saved.

Drawings

FIG. 1 is a sectional view of the dispensing valve of the present invention;

FIG. 2 is a schematic view of the structure of the suck-back packer of FIG. 1 in accordance with the present invention;

fig. 3 is a schematic view of the enlarged structure at a point a in fig. 1 according to the present invention.

In the figure: 1. a valve body; 101. a feed inlet; 2. a needle cylinder; 201. a glue dripping groove; 3. a cylinder; 301. an air inlet groove; 4. pushing the tube; 401. a through hole; 402. a limiting plug; 5. back sucking the isolation tube; 501. a positioning plug; 502. a middle through groove; 503. a piston slide block; 6. a first spring; 7. a sealing piston; 8. a pneumatic piston; 9. positioning threaded sleeves; 10. a second spring; 11. and adjusting the screw shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, a dispensing valve for a dispenser, includes a valve body 1, a feed inlet 101 is disposed on one side of the middle portion of the valve body 1, a glue input pipe connected to the feed inlet 101 is flanged on the side surface of the valve body 1, and a check valve is disposed on the glue input pipe, the check valve is opened when glue enters the valve body 1, a needle cylinder 2 is fixedly sleeved at the bottom of the valve body 1, a glue dripping groove 201 communicated with the inner cavity of the valve body 1 is disposed at the middle portion of the needle cylinder 2, a cylinder 3 is fixedly sleeved at the top of the valve body 1, a push pipe 4 is movably sleeved in the inner cavity of the valve body 1, a suck-back isolation pipe 5 is fixedly sleeved at the bottom end of the push pipe 4, the push pipe 4 is communicated with the inner cavity of the suck-back isolation pipe 5, and the inner diameter of the push pipe 4 is smaller than the inner diameter of the suck-back isolation pipe 5, referring to fig. 2, a positioning plug 501 is fixedly sleeved at the bottom end of the suck-back isolation pipe 5, the diameter value of the positioning plug 501 is larger than the inner diameter value of the glue dripping groove 201, the outer sides of the resorption sealing isolation pipe 5 and the positioning plug 501 are not in contact with the inner wall of the valve body 1, a middle through groove 502 is formed in the middle of the positioning plug 501, a piston sliding block 503 is movably sleeved inside the resorption sealing isolation pipe 5, the outer side of the piston sliding block 503 is completely attached to the inner wall of the resorption sealing isolation pipe 5, magnetic rings are respectively arranged on the top of the piston sliding block 503 and the top of the inner cavity of the resorption sealing isolation pipe 5, and opposite magnetic poles of the two magnetic rings are the same.

Referring to fig. 1, the joint of the valve body 1 and the cylinder 3 is a piston cavity, the piston cavity is communicated with the interior of the valve body 1 and the feed inlet 101, a first spring 6 movably sleeved outside the push tube 4 is arranged in the piston cavity, the bottom end of the first spring 6 is connected with a sealing piston 7 fixedly sleeved on the push tube 4, one side of the cylinder 3 is provided with an air inlet groove 301, referring to fig. 3, a pneumatic piston 8 positioned above the air inlet groove 301 is movably sleeved inside the air inlet groove 301, a lower chamber of the pneumatic piston 8 in the cylinder 3 is communicated with the air inlet groove 301, when the pneumatic piston 8 is positioned at the bottommost position of the inner chamber of the cylinder 3, a chamber above the pneumatic piston 8 in the cylinder 3 is in a negative pressure pumping state, the pneumatic piston 8 is movably sleeved on the top end of the push tube 4, and both sides of the top end of the push tube 4 are provided with through holes 401, the height value of the through holes 401 is smaller than the height value of the joint surface of the pneumatic piston 8 and the push tube 4, the pneumatic piston 8 can seal the through hole 401, the limit plug 402 is fixedly sleeved at the top end of the push tube 4, the limit plug 402 seals the push tube 4 at the top end of the push tube 4, the diameter value of the limit plug 402 is larger than the outer diameter value of the push tube 4, the pneumatic piston 8 cannot be separated from the push tube 4 through the limiting effect of the limit plug 402, and when the top of the pneumatic piston 8 contacts with the bottom of the limit plug 402, the pneumatic piston 8 is in a state of plugging the through hole 401, at the moment, the negative pressure state above the pneumatic piston 8 in the cylinder 3 cannot affect the inside of the push tube 4, the top end thread of the cylinder 3 is sleeved with the positioning screw sleeve 9, the middle thread of the positioning screw sleeve 9 is sleeved with the adjusting screw shaft 11, the second spring 10 is arranged between the bottom of the adjusting screw shaft 11 and the top of the pneumatic piston 8, the middle of the adjusting screw shaft 11 is provided with a notch, and the top end of the adjusting screw shaft 11 is provided with an air inlet and outlet pipe, by controlling the air pressure above the inside of the pneumatic piston 8, after the pneumatic piston 8 moves to the bottom of the air inlet groove 301, negative pressure can be formed above the pneumatic piston 8, and the negative pressure overcomes the magnetic repulsion force of the two magnetic rings.

The joint position of the inner wall of the push pipe 4 and the cylinder 3 is provided with a sealing layer, and the joint of the cylinder 3 and the valve body 1 is also provided with a sealing layer, so that when the air inlet groove 301 is filled with air, the air cannot permeate into the inner cavity of the valve body 1, and the problems that the precision of the glue dripping amount is poor and the product quality is affected are avoided.

When the glue dispensing device is used specifically, the height position of the bottom end of the adjusting screw shaft 11 is adjusted by controlling the rotation of the adjusting screw shaft 11, so that the up-and-down moving range of the pneumatic piston 8 is limited, the same glue dripping amount is ensured every time, the error is small, when the glue dispensing device is used specifically, under the action of the elastic force of the first spring 6 in the initial state, the suck-back isolation pipe 5 is positioned at the bottom of the valve body 1 and is contacted with the needle cylinder 2, the glue dripping groove 201 is sealed, meanwhile, under the action of the elastic force of the second spring 10, the pneumatic piston 8 is also positioned at the bottom of the inner cavity of the air cylinder 3, at the moment, the pneumatic piston 8 is separated from the through hole 401, when the glue dispensing work is carried out, the air inlet groove 301 inflates air into the air cylinder 3, so that the pneumatic piston 8 overcomes the elastic force of the second spring 10, the pneumatic piston 8 moves upwards and is contacted with the bottom of the limiting plug 402, the pneumatic piston 8 seals the through hole 401, under the action of the magnetic repulsion force of the magnetic ring, the piston slide block 503 moves to the bottom of the inner cavity of the suck-back sealed partition pipe 5, and along with the continuous increase of the air pressure, the pneumatic piston 8 drives the limit plug 402, the push pipe 4, the sealing piston 7 and the suck-back sealed partition pipe 5 to move upwards continuously, the bottom of the suck-back sealed partition pipe 5 is separated from the glue dripping groove 201, the sealing piston 7 moves upwards to suck glue into the valve body 1 through the glue input pipe and the feed inlet 101, then the air pressure input is removed from the air groove 301, under the elastic force action of the first spring 6 and the second spring 10, the sealing piston 7, the pneumatic piston 8, the push pipe 4 and the suck-back sealed partition pipe 5 integrally and simultaneously move downwards, at the moment, the one-way valve on the glue input pipe is in a closed state, the suck-back sealed partition pipe 5 moves to the glue dripping groove 201, the glue in the valve body 1 is extruded through the glue dripping groove 201, the work of dripping glue is completed, then under the elastic force action of the second spring 10, the pneumatic piston 8 is pushed to move downwards relative to the push tube 4 continuously to open the through hole 401, the inner cavity of the push tube 4 is communicated with a chamber above the pneumatic piston 8 in the cylinder 3, and after the pneumatic piston 8 moves to the air inlet groove 301, the chamber is in a negative pressure state, under the action of negative pressure, the piston slide block 503 overcomes the magnetic repulsion force of the two magnetic rings to move upwards, so that a negative pressure pumping state is formed for the glue dripping groove 201, the problem that glue drops and wires in the glue dripping groove 201 affect the product quality is solved, and the pneumatic piston 8 is pushed to move upwards by refilling air into the air inlet groove 301, the pneumatic piston 8 is driven to move upwards to contact with the limit plug 402 to drive the push tube 4 and the sealing piston 7 to move upwards integrally, at the moment, the limit plug 402 is in a blocking state, and the negative pressure intensity in the push tube 4 is smaller after the pneumatic piston 8 moves upwards for a certain distance, under the action of the magnetic repulsion force of the two magnetic rings, the piston slide block 503 moves downwards, the glue water in the suck-back seal partition pipe 5 and the residual glue water in the glue dripping groove 201 flow equally into the valve body 1 by matching with the upward movement of the seal piston 7, so that when the glue water is extracted from the valve body 1, the problem that the precision of the glue water amount dripped each time is poor due to the fact that the external air enters from the glue dripping groove 201 and the extraction amount of the glue water is low is avoided, the quality of the product is further guaranteed, no suck-back force driving device is additionally arranged, energy consumption is saved, the waste of suck-back glue materials is avoided, the glue materials are pushed out for glue dripping through the downward movement of the pneumatic piston 8, compared with the existing glue dripping valve which adopts the pneumatic piston 8 to move upward, the glue dripping amount is not influenced by the pressure supplied by the glue material barrel, the precision influence factor of the glue water dripping amount each time is reduced, the glue dripping accuracy is correspondingly improved, and the quality of the product is further guaranteed, meanwhile, the energy consumption of continuous pressure supply of the sizing barrel is saved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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. The utility model provides a dispensing valve for point gum machine, includes valve body (1), and one side at valve body (1) middle part is equipped with feed inlet (101), its characterized in that: the glue dripping valve is characterized in that a glue input pipe communicated with the feed port (101) is arranged on the side face of the valve body (1), a one-way valve is arranged on the glue input pipe, a needle cylinder (2) is arranged at the bottom of the valve body (1), a glue dripping groove (201) communicated with the feed port (101) is formed in the needle cylinder (2), an air cylinder (3) is arranged at the top of the valve body (1), a push pipe (4) is arranged in the air cylinder (3), the bottom end of the push pipe (4) extends into the valve body (1) and is fixedly connected with a suck-back sealing partition pipe (5), the suck-back sealing partition pipe (5) can seal the glue dripping groove (201), a pneumatic piston (8) is movably sleeved at the top end of the push pipe (4), the push pipe (4) can move upwards along with the pneumatic piston (8), the pneumatic piston (8) is movably sleeved with the inner wall of the air cylinder (3), an air inlet groove (301) positioned below the pneumatic piston (8) is formed in the air cylinder (3), when the pneumatic piston (8) is positioned at the bottommost position of the inner cavity of the cylinder (3), a cavity above the pneumatic piston (8) in the cylinder (3) is in a negative pressure pumping state, through holes (401) are formed in two sides of the top end of the push pipe (4), the height value of each through hole (401) is smaller than the height value of the joint face of the pneumatic piston (8) and the push pipe (4), a second spring (10) is arranged between the top of the inner cavity of the pneumatic piston (8) and the top of the inner cavity of the cylinder (3), the joint of the valve body (1) and the cylinder (3) is a piston cavity, the piston cavity is communicated with the inner part and the feed inlet (101) of the valve body (1), a first spring (6) movably sleeved on the outer side of the push pipe (4) is arranged in the piston cavity, the bottom end of the first spring (6) is connected with a sealing piston (7) fixedly sleeved on the push pipe (4), and the bottom end of the suck-back isolation pipe (5) is fixedly sleeved with a positioning plug (501), the diameter value of location stopper (501) is greater than the internal diameter value that drips gluey groove (201), and the resorption seals and separates pipe (5), the outside of location stopper (501) and the inner wall of valve body (1) contactless, logical groove (502) in the middle of having seted up in the middle of location stopper (501), the resorption seals the inside movable sleeve that separates pipe (5) and is equipped with piston slider (503), and the outside of piston slider (503) seals the inner wall that separates pipe (5) with the resorption completely and laminates, the top of piston slider (503) and the resorption seals the top that separates pipe (5) inner chamber and be equipped with the magnetic ring respectively, and the opposite face of two magnetic rings is the same.

2. The dispensing valve for a dispenser according to claim 1, wherein: the top end of the cylinder (3) is in threaded sleeve connection with a positioning threaded sleeve (9), the middle of the positioning threaded sleeve (9) is in threaded sleeve connection with an adjusting threaded shaft (11), and the second spring (10) is arranged between the adjusting threaded shaft (11) and the pneumatic piston (8).

3. The dispensing valve for a dispenser according to claim 1, wherein: the fixed cover in top of ejector sleeve (4) is equipped with spacing stopper (402), spacing stopper (402) are sealed ejector sleeve (4) in the top of ejector sleeve (4), and the diameter value of spacing stopper (402) is greater than the external diameter value of ejector sleeve (4).

4. The dispensing valve for a dispenser according to claim 1, wherein: the joint part of the push pipe (4) and the inner wall of the cylinder (3) is provided with a sealing layer, and the joint of the cylinder (3) and the valve body (1) is also provided with a sealing layer.