CN113019817A - Dual pressure electrospray valve - Google Patents
Dual pressure electrospray valve Download PDFInfo
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- CN113019817A CN113019817A CN202110290146.4A CN202110290146A CN113019817A CN 113019817 A CN113019817 A CN 113019817A CN 202110290146 A CN202110290146 A CN 202110290146A CN 113019817 A CN113019817 A CN 113019817A
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- lever
- piezoelectric
- glue supply
- dual
- shell
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0225—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
- B05C11/1026—Valves
Abstract
A dual piezo jet valve is provided, comprising a lever; a housing on which a rotating part supporting the lever is mounted; the two piezoelectric driving assemblies are arranged on the shell and are abutted against the lever, and the two piezoelectric driving assemblies are respectively positioned on two sides of the rotating part; the glue supply assembly is arranged on the shell; and the firing pin is arranged on the lever, connected with the glue supply assembly and driven by the lever to move so as to control the opening and closing of the glue supply assembly. The piezoelectric driving components are respectively arranged on the two sides of the rotating part of the shell, when the length and the rigidity of the piezoelectric driving component on one side are changed due to temperature, the piezoelectric driving component on the other side can correct and adjust the swinging quantity of the lever, and the influence of the lever on the output displacement quantity of the striker due to amplification can be eliminated; and moreover, a spring structure is cancelled, the influence of the spring on the lever due to fatigue is eliminated, the accurate control of the firing pin on the glue supply assembly is ensured, and the stability of the dual piezoelectric injection valve is improved.
Description
Technical Field
The application belongs to the technical field of dispensing, and more specifically relates to a dual piezoelectric injection valve.
Background
In the dispensing technology field, a single piezoelectric injection valve is usually used to realize the dispensing operation. The single piezoelectric injection valve mainly comprises a piezoelectric ceramic driving component, a lever, a spring, a firing pin and a glue supply component; the piezoelectric ceramic driving component and the spring are respectively arranged on two sides of the rotating part of the lever to realize the up-and-down swing of the lever; the firing pin is used for being matched with the glue supply assembly, and the firing pin is driven by the lever to swing up and down to control the opening and closing of the glue supply assembly.
However, the up-and-down swinging of the lever is realized only by the single piezoelectric ceramic driving component and the spring, the length and the rigidity of the single piezoelectric ceramic driving component are easy to change under the influence of temperature, and the error generated by the single piezoelectric ceramic driving component is multiplied by the lever to influence the stroke of the firing pin; moreover, the spring can influence the swing of the lever due to fatigue, and further influence the firing pin on the accurate control of the glue supply assembly and influence the stability of the injection valve.
Disclosure of Invention
An object of an embodiment of the present application is to provide a dual piezoelectric injection valve to solve the problems existing in the related art: the length and the rigidity of the single piezoelectric ceramic driving assembly are easy to change under the influence of temperature, and the spring can influence the swinging of the lever due to fatigue, so that the accurate control of the striker on the glue supply assembly is influenced, and the stability of the injection valve is influenced.
In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:
provided is a dual piezoelectric injection valve including:
a lever;
a housing on which a rotating part supporting the lever is mounted;
the piezoelectric driving components are arranged on the shell and abutted against the lever, and are used for driving the lever to rotate around the rotating part, the two piezoelectric driving components are respectively positioned on two sides of the rotating part, and the distances between the piezoelectric driving components and the rotating part are equal;
the glue supply assembly is arranged on the shell;
and the firing pin is arranged on the lever, is connected with the glue supply assembly and is driven by the lever to move so as to control the opening and closing of the glue supply assembly.
In one embodiment, the dual piezoelectric injection valve further includes an elastic member disposed between the rotating portion and the striker, one end of the elastic member abuts against the lever, and the other end of the elastic member abuts against the housing.
In one embodiment, the dual piezoelectric injection valve further comprises a displacement measuring rod mounted on the lever and a displacement sensor for cooperating with the displacement measuring rod to monitor the stroke of the lever, the displacement sensor being mounted in the housing.
In one embodiment, each of the piezoelectric driving components includes a piezoelectric stack unit mounted in the housing and an adjusting unit for adjusting a deformation amount of the piezoelectric stack unit; each adjusting unit is mounted on the housing, one end of each piezoelectric stacking unit abuts against the corresponding adjusting unit, and the other end of each piezoelectric stacking unit abuts against the lever.
In one embodiment, each of the adjusting units includes an adjusting screw mounted on the housing and a locking member for locking the adjusting screw to the housing, and one end of each of the adjusting screws abuts against the corresponding piezoelectric stack unit.
In one embodiment, each of the piezoelectric stacking units includes a piezoelectric stack, a first ball installed between one end of the piezoelectric stack and the corresponding adjusting unit, and a second ball installed between the other end of the piezoelectric stack and the lever.
In one embodiment, the glue supply assembly comprises a glue supply base arranged on the shell, a glue supply nozzle arranged on the glue supply base and a glue dispensing nozzle arranged on the glue supply base; the glue supply base is provided with a first flow passage communicated with the glue supply nozzle and a second flow passage communicated with the glue dispensing nozzle, and the first flow passage is communicated with the second flow passage; one end of the firing pin is hinged to the lever, the other end of the firing pin extends into the second flow channel and is used for plugging or opening the dispensing nozzle, and the diameter of the second flow channel is larger than that of the firing pin.
In one embodiment, the glue supply base is further provided with a third flow channel communicated with the first flow channel and a plug for plugging the third flow channel, and the plug is installed in the third flow channel.
In one embodiment, the glue supply assembly further includes a sealing member for sealing an end of the second flow passage away from the glue dispensing nozzle, the sealing member is mounted on the glue supply base, and the sealing member is sleeved on the striker.
In one embodiment, the dual piezoelectric injection valve further comprises an inlet nozzle and an outlet nozzle respectively mounted on the housing, the inlet nozzle and the outlet nozzle respectively communicating with the interior of the housing.
One or more technical solutions in the embodiments of the present application have at least one of the following technical effects: the piezoelectric driving components are respectively arranged on the two sides of the rotating part of the shell, when the length and the rigidity of the piezoelectric driving component on one side are changed due to temperature, the piezoelectric driving component on the other side can correct and adjust the swinging quantity of the lever, and the influence of the lever on the output displacement quantity of the striker due to amplification can be eliminated; and moreover, a spring structure is cancelled, the influence of the spring on the lever due to fatigue is eliminated, the accurate control of the firing pin on the glue supply assembly is ensured, and the stability of the dual piezoelectric injection valve is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or exemplary technical descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a dual piezoelectric injection valve provided in an embodiment of the present application;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is a schematic cross-sectional view of FIG. 1;
fig. 4 is a schematic structural view of a dual piezoelectric injection valve provided in an embodiment of the present application with a housing removed;
fig. 5 is a schematic structural diagram of a housing provided in an embodiment of the present application;
FIG. 6 is a schematic structural diagram of a lever according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a piezoelectric driving assembly according to an embodiment of the present disclosure;
fig. 8 is an exploded view of a glue supply assembly according to an embodiment of the present disclosure;
FIG. 9 is a schematic cross-sectional view of an adhesive supply assembly according to an embodiment of the present disclosure;
fig. 10 is a schematic structural diagram of a striker according to an embodiment of the present application.
Wherein, in the drawings, the reference numerals are mainly as follows:
1-a lever; 11-a groove; 12-a convex part; 13-a card slot;
2-a housing; 21-a housing; 22-a cover plate; 23-a first housing chamber; 24-a second accommodating chamber; 25-a boss; 26-a rotating shaft; 27-a third housing chamber; 28-a spacer plate; 29-an air inlet nozzle; 20-an air outlet nozzle;
3-a piezoelectric drive assembly; 31-a piezo-electric stack unit; 311-a piezoelectric stack; 312 — a first sphere; 313-a second sphere; 314-a piezoelectric stack body; 315-upper hinge; 316-lower hinge; 317-a gasket; 32-a regulating unit; 321-adjusting screws; 322-a locking member;
4-a glue supply assembly; 41-glue supply base; 42-glue supply nozzle; 43-glue dispensing nozzle; 44-a first flow channel; 45-a second flow channel; 46-a third flow channel; 47-plug; 48-a seal; 481 — first seal ring; 482-a second seal ring; 49-spin nut;
5-a firing pin; 51-a hinge block;
6-an elastic member; 7-a displacement measuring rod; 8-displacement sensor.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
Furthermore, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.
In the description of the present application, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present application.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in some embodiments" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Referring to fig. 1 to 3, a dual piezoelectric injection valve according to an embodiment of the present invention will now be described. The dual piezoelectric injection valve comprises a lever 1, a shell 2, two piezoelectric driving components 3, a glue supply component 4 and a firing pin 5, wherein the glue supply component 4 and the firing pin are installed on the shell 2. As shown in fig. 5, the housing 2 includes a casing 21 and a cover plate 22 connected to the casing 21, a first accommodating chamber 23 for accommodating the lever 1 and a second accommodating chamber 24 for accommodating the two piezoelectric driving assemblies 3 are separately formed in the casing 21, a boss 25 is installed in the first accommodating chamber 23, a rotation shaft 26 is installed on the boss 25, the boss 25 and the rotation shaft 26 are combined to form a rotation portion for supporting the lever 1, and the lever 1 can rotate around the rotation portion. The boss 25 is provided with a recessed portion along the thickness direction of the housing 21, so that the rotating shaft 26 can be supported, and the rotating shaft 26 is prevented from sliding off the boss 25. The cover plate 22 may cover the first receiving chamber 23 and the second receiving chamber 24. Through the dismouting of apron 22, make things convenient for the dismouting to piezoelectric drive subassembly 3 and lever 1.
Referring to fig. 3 and 6, one end of the lever 1 is provided with a groove 11 into which the rotating shaft 26 and the boss 25 extend, and the lever 1 can rotate around the rotating shaft 26. The other end of the lever 1 protrudes out of the housing 21, and the striker 5 is mounted to the end of the lever 1 that protrudes out of the housing 21. The distance between the striker 5 and the rotating shaft 26 is larger than the distance between the end of the lever 1 away from the striker 5 and the rotating shaft 26, so that the moving reliability of the striker 5 can be improved. The side surface of the lever 1 departing from the groove 11 is convexly provided with a convex part 12 towards the direction far away from the boss 25, and the convex part 12 is positioned between the two piezoelectric driving components 3, so that the two piezoelectric driving components 3 can be matched and resisted to limit the rotation stroke of the lever 1.
Referring to fig. 3, two piezoelectric driving assemblies 3 are respectively installed in the second accommodating chamber 24, one end of each piezoelectric driving assembly 3 is installed on the housing 21, and the other end of each piezoelectric driving assembly 3 extends into the first accommodating chamber 23 and abuts against the lever 1. The two piezoelectric driving assemblies 3 are respectively located at two sides of the rotating portion, and the two piezoelectric driving assemblies 3 are located at the same side of the lever 1. When each piezoelectric driving element 3 is charged or discharged, each piezoelectric driving element 3 can be extended or shortened. When the piezoelectric driving component 3 on one side of the rotating shaft 26 is extended, the piezoelectric driving component 3 on the other side of the rotating shaft 26 is shortened, and at this time, the lever 1 moves upwards and drives the striker 5 to move upwards, so that the opening of the dual piezoelectric injection valve can be realized. When the piezoelectric driving component 3 on one side of the rotating shaft 26 is shortened, the piezoelectric driving component 3 on the other side of the rotating shaft 26 is extended, and at this time, the lever 1 moves downwards and drives the striker 5 to move downwards, so that the closing of the dual-pressure electrospray valve can be realized. The distances between each piezoelectric driving component 3 and the rotating shaft 26 of the rotating part are equal, so that the extension amount and the shortening amount of the two piezoelectric driving components 3 can be kept consistent, the extension amount and the shortening amount of one piezoelectric driving component 3 can be prevented from being influenced by temperature, the other piezoelectric driving component 3 can compensate and correct the movement amount of the lever 1, and the swinging reliability of the lever 1 can be improved.
In the structure, the piezoelectric driving components 3 are respectively arranged on the two sides of the rotating part of the shell 2, when the length and the rigidity of the piezoelectric driving component 3 on one side are changed due to temperature, the piezoelectric driving component 3 on the other side can correct and adjust the swinging amount of the lever 1, and the influence of the lever 1 on the output displacement of the firing pin 5 due to amplification can be eliminated; and a spring structure is cancelled, the influence of the spring on the lever 1 due to fatigue is eliminated, the accurate control of the firing pin 5 on the glue supply assembly 4 is ensured, and the stability of the dual piezoelectric injection valve is improved.
In an embodiment, referring to fig. 2 and 3, as a specific implementation of the dual piezoelectric injection valve provided in the embodiments of the present application, the dual piezoelectric injection valve further includes an elastic member 6 disposed between the rotating portion and the striker 5, one end of the elastic member 6 abuts against the lever 1, and the other end of the elastic member 6 abuts against the housing 2. With the structure, the elastic piece 6 can play a certain role in buffering and protecting the up-and-down swing of the lever 1, and further can improve the structural stability of the lever 1. Wherein, the elastic member 6 may be a spring.
In an embodiment, referring to fig. 3 and 4, as an embodiment of the dual piezoelectric injection valve provided in the embodiment of the present application, the dual piezoelectric injection valve further includes a displacement measuring rod 7 mounted on the lever 1 and a displacement sensor 8 for cooperating with the displacement measuring rod 7 to monitor a stroke of the lever 1, and the displacement sensor 8 is mounted in the housing 2. With the structure, when the lever 1 swings up and down, the displacement measuring rod 7 moves up and down along with the lever. The displacement sensor 8 detects the movement amount of the displacement measuring rod 7, so that the stroke of the lever 1 can be monitored in real time, the position of the firing pin 5 can be compensated, and the stability of the dual piezoelectric injection valve is ensured.
In one embodiment, referring to fig. 3 and 5, a third accommodating chamber 27 for accommodating the displacement sensor 8 is formed in the housing 21, one end of the displacement measuring rod 7 is mounted on the lever 1, and the other end of the displacement measuring rod 7 extends into the third accommodating chamber 27 and is connected to the displacement sensor 8. The displacement measuring rod 7 and the elastic member 6 may be respectively located at both sides of the lever 1 to contribute to reliability of the up-and-down swing of the lever 1. The distance between the elastic member 6 and the striker 5 is greater than the distance between the elastic member 6 and the rotary shaft 26, so that the amount of deformation of the elastic member 6 can be reduced, thereby improving the reliability of the elastic member 6 and preventing its failure. The distance between the displacement measuring rod 7 and the rotating shaft 26 is larger than the distance between the displacement measuring rod 7 and the firing pin 5, so that the matching accuracy of the displacement measuring rod 7 and the displacement sensor 8 can be improved.
In one embodiment, referring to fig. 3 and 7, as a specific implementation of the dual piezoelectric injection valve provided in the embodiments of the present application, each piezoelectric driving assembly 3 includes a piezoelectric stack unit 31 installed in the housing 2 and an adjusting unit 32 for adjusting a deformation amount of the piezoelectric stack unit 31; each adjustment unit 32 is attached to the housing 2, one end of each piezoelectric stack unit 31 abuts against the corresponding adjustment unit 32, and the other end of each piezoelectric stack unit 31 abuts against the lever 1. With this structure, each of the adjustment units 32 can be used to adjust the amount of extension and contraction of the corresponding piezo-electric stack unit 31, and thus can adjust the amount of swing of the lever 1 and the amount of movement of the striker 5.
In an embodiment, referring to fig. 3 and 7, as a specific implementation of the dual piezoelectric injection valve provided in the embodiments of the present application, each adjusting unit 32 includes an adjusting screw 321 installed on the housing 2 and a locking member 322 for locking the adjusting screw 321 on the housing 2, and one end of each adjusting screw 321 abuts against the corresponding piezoelectric stack unit 31. Here, the locking member 322 may be a nut. With this structure, the amount of deformation of the piezoelectric stack unit 31 can be adjusted by adjusting the length of the screw 321 that protrudes into the case 2. Of course, in other embodiments, each adjusting unit 32 may be an air cylinder, an electric cylinder, an oil cylinder, etc., and is not limited herein.
In one embodiment, referring to fig. 3 and 7, as a specific implementation of the dual piezoelectric injection valve provided by the embodiments of the present application, each piezoelectric stack unit 31 includes a piezoelectric stack 311, a first sphere 312 installed between one end of the piezoelectric stack 311 and the corresponding adjusting unit 32, and a second sphere 313 installed between the other end of the piezoelectric stack 311 and the lever 1. Specifically, the piezoelectric stack 311 may include a piezoelectric stack body 314, an upper hinge 315 mounted at one end of the piezoelectric stack body 314, and a lower hinge 316 mounted at the other end of the piezoelectric stack body 314, and the upper hinge 315 and the lower hinge 316 may be respectively adhesively fixed to the piezoelectric stack body 314. The top surface of the upper hinge 315 is provided with an arc concave surface for supporting the first sphere 312, the bottom surface of the corresponding adjusting screw 321 is provided with an arc concave surface for supporting the first sphere 312, and two ends of the first sphere 312 can be in point contact with the corresponding adjusting screw 321 and the corresponding upper hinge 315 respectively. Similarly, the bottom surface of the lower hinge 316 is provided with an arc-shaped concave surface for supporting the second ball 313, the lever 1 is correspondingly provided with an arc-shaped concave surface for supporting the second ball 313, and two ends of the second ball 313 can be respectively in point contact with the corresponding lower hinge 316 and the lever 1.
In one embodiment, referring to fig. 3, 5 and 7, each piezoelectric stack unit 31 further includes a spacer 317 sleeved on the lower hinge 316, a partition 28 is disposed between the first accommodating chamber 23 and the second accommodating chamber 24, and the spacer 317 is disposed between the lower hinge 316 and the partition 28. With this structure, the spacer 317 can be used for preloading the piezoelectric stack 311, and compensate for the inertial force generated when the piezoelectric stack 311 vibrates at a high speed.
In some embodiments, each piezoelectric driving component 3 may also be a cylinder, an electric cylinder, an oil cylinder, etc. for driving the lever 1 to swing around the rotating shaft 26, which is not limited herein.
In an embodiment, referring to fig. 8 and 9, as a specific implementation of the dual piezoelectric injection valve provided in the embodiments of the present application, the glue supply assembly 4 includes a glue supply base 41 mounted on the housing 2, a glue supply nozzle 42 mounted on the glue supply base 41, and a glue dispensing nozzle 43 mounted on the glue supply base 41; the glue supply base 41 is provided with a first flow passage 44 communicated with the glue supply nozzle 42 and a second flow passage 45 communicated with the glue dispensing nozzle 43, and the first flow passage 44 is communicated with the second flow passage 45; one end of the firing pin 5 is hinged on the lever 1, the other end of the firing pin 5 extends into the second flow channel 45 and is used for plugging or opening the dispensing nozzle 43, and the diameter of the second flow channel 45 is larger than that of the firing pin 5. Specifically, the first flow path 44 may be provided in a direction perpendicular to the length direction of the striker 5, and the second flow path 45 may be provided in the length direction of the striker 5. The glue supply nozzle 42 is used for connecting with an external glue supply mechanism and can guide glue solution into the second flow channel 45. The cross section of the second flow channel 45 may be a structure of a quincunx hole, the periphery of the quincunx hole is used for conveying glue solution, and the middle of the quincunx hole is used for guiding the up-and-down movement of the striker 5 and can be lubricated by the glue solution. When the lever 1 swings upwards and drives the striker 5 to move upwards, the bottom of the striker 5 is separated from the dispensing nozzle 43, so that the first flow passage 44, the second flow passage 45 and the dispensing nozzle 43 are communicated, and high-speed glue spraying operation can be realized; when the lever 1 swings downwards and drives the firing pin 5 to move downwards, the bottom of the firing pin 5 seals the dispensing nozzle 43, and the dispensing nozzle 43 is disconnected from the second flow channel 45, so that the closing of the dual piezoelectric injection valve is realized.
In one embodiment, referring to fig. 4, 6 and 10, a slot 13 is formed at one end of the lever 1, a hinge block 51 is mounted at one end of the striker 5, and the hinge block 51 is mounted in the slot 13, so that the movement of the striker 5 in the horizontal plane and the rotation in the vertical plane can be realized.
In one embodiment, referring to fig. 9, the dispensing nozzle 43 is fastened to the glue supply base 41 by rotating the nut 49, so as to facilitate the assembly and disassembly of the dispensing nozzle 43.
In an embodiment, referring to fig. 8 and 9, as a specific implementation manner of the dual piezoelectric injection valve provided in the embodiment of the present application, the glue supply base 41 is further provided with a third flow channel 46 communicated with the first flow channel 44 and a plug 47 for plugging the third flow channel 46, and the plug 47 is installed in the third flow channel 46. With this structure, when the striker 5 blocks the dispensing nozzle 43, the plug 47 can be pulled out to communicate the first flow channel 44 with the third flow channel 46, and the glue can be discharged from the third flow channel 46.
In one embodiment, referring to fig. 8 and 9, as an embodiment of the dual piezoelectric injection valve provided in the present application, the glue supply assembly 4 further includes a sealing member 48 for sealing an end of the second flow channel 45 away from the glue dispensing nozzle 43, the sealing member 48 is mounted on the glue supply base 41, and the sealing member 48 is sleeved on the striker 5. With this structure, the upper end of the second flow channel 45 can be sealed by the sealing member 48, so that the glue flowing into the first flow channel 44 can enter the second flow channel 45 and be discharged from the dispensing nozzle 43.
In an embodiment, referring to fig. 8 and 9, the sealing member 48 may include a first sealing ring 481 and a second sealing ring 482 respectively mounted on the glue supply base 41, and the first sealing ring 481 and the second sealing ring 482 are respectively provided with a through hole for the striker 5 to pass through. With this structure, the first and second seal rings 481 and 482 can improve the sealing effect of the second flow path 45.
In some embodiments, the glue supply assembly 4 may also be a glue supply base 41, a glue supply nozzle 42 and a glue dispensing nozzle 43 respectively mounted on the glue supply base 41, and a first channel communicating the glue supply nozzle 42 and the glue dispensing nozzle 43 and a second channel for inserting the striker 5 are opened on the glue supply base 41, and the first channel is communicated with the second channel. When the striker 5 moves downward to intercept the first channel, the dual piezoelectric injection valve is closed. When the striker 5 moves upward to communicate the first passage, the dual piezoelectric injection valve is opened. Of course, in other embodiments, the structure of the glue supply assembly 4 may also be adjusted according to actual needs, and is not limited herein.
In an embodiment, referring to fig. 1 and 2, as a specific implementation of the dual piezoelectric injection valve provided in the embodiments of the present application, the dual piezoelectric injection valve further includes an inlet nozzle 29 and an outlet nozzle 20 respectively mounted on the housing 2, and the inlet nozzle 29 and the outlet nozzle 20 respectively communicate with the inside of the housing 2. With this structure, the inlet nozzle 29 is used for the compressed gas to enter the housing 2, and the outlet nozzle 20 is used for the compressed gas in the housing 2 to discharge, so that the heat dissipation of the piezoelectric driving component 3 in the housing 2 can be realized.
With reference to fig. 3, the specific steps of closing the dual electrospray valve provided in the present application will now be described: the piezoelectric driving component 3 on the left side of the rotating portion is discharged, the piezoelectric driving component 3 on the right side of the rotating portion is charged, the piezoelectric driving component 3 on the right side of the rotating portion is extended, the lever 1 swings downwards around the rotating shaft 26, the lever 1 acts on the piezoelectric driving component 3 on the left side of the rotating portion and shortens the piezoelectric driving component 3, the striker 5 is driven to move downwards in the process that the lever 1 swings downwards, and the striker 5 can block the glue dispensing nozzle 43 of the glue supply component 4, so that the double piezoelectric injection valve is closed. Wherein the extension of the piezoelectric driving element 3 located on the right side of the rotation part is equal to the shortening of the piezoelectric driving element 3 located on the left side of the rotation part.
With reference to fig. 3, the specific steps of the dual electrospray valve provided in the present application when opened will now be described: the piezoelectric driving component 3 on the left side of the rotating portion is charged, the piezoelectric driving component 3 on the right side of the rotating portion is discharged, the piezoelectric driving component 3 on the left side of the rotating portion is extended, the lever 1 swings upwards around the rotating shaft 26, the lever 1 acts on the piezoelectric driving component 3 on the right side of the rotating portion and shortens the piezoelectric driving component 3, the lever 1 drives the striker 5 to move upwards in the process of swinging upwards, and the striker 5 can be separated from the glue dispensing nozzle 43 of the glue supply component 4 to achieve opening of the double-piezoelectric injection valve. Wherein the extension of the piezoelectric driving element 3 located on the left side of the rotating part is equal to the shortening of the piezoelectric driving element 3 located on the right side of the rotating part.
The application provides a two piezoelectricity injection valve has following beneficial effect at least:
1. the dual piezoelectric driving component 3 is adopted, so that the influence of temperature on the amplified output displacement of the lever 1 is eliminated, the influence of the fatigue precision of the spring is eliminated, and the stability of the dual piezoelectric injection valve is improved.
2. Through the cooperation of the displacement measuring rod 7 and the displacement sensor 8, the position of the firing pin 5 can be compensated and corrected, and the jetting stability is ensured.
3. The up-and-down movement of the striker 5 is realized by driving the lever 1 to swing through the two piezoelectric driving components 3, and the device has the advantages of quick response, high reliability and good displacement linearity.
4. The striker 5 can be guided in motion through the second flow path 45, and can be lubricated by glue solution, and at the same time, the influence of sealing leakage on the movement of the striker 5 can be avoided, and the service life of the striker 5 can be prolonged.
5. The shell 2, the air inlet nozzle 29 and the air outlet nozzle 20 can form an independent air cooling chamber to carry out air cooling heat dissipation on the piezoelectric drive component 3, the working stability of the dual-piezoelectric injection valve is guaranteed, the influence of heat dissipation air on other parts can be avoided, and the structural stability is further improved.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A dual piezo jet valve, comprising:
a lever;
a housing on which a rotating part supporting the lever is mounted;
the piezoelectric driving components are arranged on the shell and abutted against the lever, and are used for driving the lever to rotate around the rotating part, the two piezoelectric driving components are respectively positioned on two sides of the rotating part, and the distances between the piezoelectric driving components and the rotating part are equal;
the glue supply assembly is arranged on the shell;
and the firing pin is arranged on the lever, is connected with the glue supply assembly and is driven by the lever to move so as to control the opening and closing of the glue supply assembly.
2. The dual piezo jet valve of claim 1, wherein: the dual piezoelectric injection valve further comprises an elastic member arranged between the rotating portion and the striker, one end of the elastic member is abutted to the lever, and the other end of the elastic member is abutted to the housing.
3. The dual piezo jet valve of claim 1, wherein: the dual piezoelectric injection valve further comprises a displacement measuring rod arranged on the lever and a displacement sensor used for being matched with the displacement measuring rod to monitor the stroke of the lever, and the displacement sensor is arranged in the shell.
4. The dual piezo jet valve of claim 1, wherein: each piezoelectric driving component comprises a piezoelectric stacking unit arranged in the shell and an adjusting unit used for adjusting the deformation of the piezoelectric stacking unit; each adjusting unit is mounted on the housing, one end of each piezoelectric stacking unit abuts against the corresponding adjusting unit, and the other end of each piezoelectric stacking unit abuts against the lever.
5. The dual piezo jet valve of claim 4, wherein: each adjusting unit comprises an adjusting screw installed on the shell and a locking piece used for locking the adjusting screw on the shell, and one end of each adjusting screw abuts against the corresponding piezoelectric stacking unit.
6. The dual piezo jet valve of claim 4, wherein: each of the piezoelectric stacking units includes a piezoelectric stack, a first ball installed between one end of the piezoelectric stack and the corresponding adjustment unit, and a second ball installed between the other end of the piezoelectric stack and the lever.
7. The dual piezo jet valve of any one of claims 1-6, wherein: the glue supply assembly comprises a glue supply base arranged on the shell, a glue supply nozzle arranged on the glue supply base and a glue dispensing nozzle arranged on the glue supply base; the glue supply base is provided with a first flow passage communicated with the glue supply nozzle and a second flow passage communicated with the glue dispensing nozzle, and the first flow passage is communicated with the second flow passage; one end of the firing pin is hinged to the lever, the other end of the firing pin extends into the second flow channel and is used for plugging or opening the dispensing nozzle, and the diameter of the second flow channel is larger than that of the firing pin.
8. The dual piezo jet valve of claim 7, wherein: and the glue supply base is also provided with a third flow channel communicated with the first flow channel and a plug for plugging the third flow channel, and the plug is arranged in the third flow channel.
9. The dual piezo jet valve of claim 7, wherein: the glue supply assembly further comprises a sealing element used for sealing one end of the second flow passage far away from the glue dispensing nozzle, the sealing element is mounted on the glue supply base, and the sealing element is sleeved on the firing pin.
10. The dual piezo jet valve of any one of claims 1-6, wherein: the double-pressure electrospray valve further comprises an air inlet nozzle and an air outlet nozzle which are respectively arranged on the shell, and the air inlet nozzle and the air outlet nozzle are respectively communicated with the inside of the shell.
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| CN202110290146.4A CN113019817A (en) | 2021-03-18 | 2021-03-18 | Dual pressure electrospray valve |
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| CN202110290146.4A CN113019817A (en) | 2021-03-18 | 2021-03-18 | Dual pressure electrospray valve |
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Application publication date: 20210625 |