Volume valve device for controlling accurate and quantitative output of glue

Abstract

The invention discloses a volume valve device for controlling accurate and quantitative output of glue. The volume valve device comprises a valve body, a valve rod A, a driving part A, a valve sleeve, a driving part B, a valve rod B and a driving part C, a first chamber, a second chamber and a third chamber are arranged at the left part in the valve body from top to bottom, and a fourth chamber is arranged at the right part in the valve body; a U-shaped glue storage channel is arranged between the bottom of the third chamber and the bottom of the fourth chamber; a glue inlet hole is formed in the side wall of the third cavity; a glue outlet hole is formed in the left bottom of the U-shaped glue storage channel; the valve rod A is arranged in the first cavity, the second cavity, the third cavity, the left part of the U-shaped glue storage channel and the glue outlet hole in a penetrating manner from top to bottom; the driving piece A is arranged in the first cavity and connected with the upper part of the valve rod A; the valve sleeve sleeves the valve rod A and is positioned in the second cavity and the third cavity, and the lower end of the valve sleeve extends into the rubber runner; the driving piece B is arranged in the second cavity and is connected with the valve sleeve; the upper end of the valve rod B is positioned in the fourth cavity, and the lower end is inserted into the right upper part of the U-shaped glue storage channel; and the driving piece C is arranged in the fourth cavity. The glue amount can be accurately output.

Description

Technical Field

[0001] The invention relates to the technical field of glue dispensing equipment, and in particular to a volumetric valve device for controlling precise quantitative output of glue. Background Art

[0002] The dispensing valve is an indispensable dispensing accessory in the dispensing equipment for realizing product dispensing, coating, filling, packaging, etc. Its main function is to realize the transportation of packaging glue medium, and to quickly suck back the glue to stop the flow in case of leakage of colloid or fluid during the packaging process, so as to ensure the packaging quality.

[0003] Simply put, a dispensing valve is a special switch that can stop the glue instantly, and is often used with dispensing machines and glue filling machines. Commonly used ones include volumetric valves, back-suction dispensing valves, ejector dispensing valves, plunger dispensing valves, and jet dispensing valves.

[0004] The volumetric valve is the core component of the dispensing equipment, which can apply the colloid to the surface of the dispensed product according to the predetermined amount requirements.

[0005] In the utility model patent "A volumetric valve device and dispensing mechanism for controlling the quantitative output of glue" with application number "202322981887.4" previously applied by the applicant of the present patent, the upper ejector rod and the lower ejector rod are of a split structure, that is, the lower end of the upper ejector rod and the upper end of the lower ejector rod are plug-connected and movably connected. Specifically, the lower end of the upper ejector rod is upwardly opened with an active cavity adapted to be inserted upwardly into the upper end of the lower ejector rod, and a certain gap is reserved at the upper part of the corresponding active cavity to form a lower ejector space. For details, please refer to the attached manual. Figure 2 As shown, the upper push rod and the lower push rod are controlled to rise and fall by a first driving member.

[0006] Although it is widely used, the inventor of this patent found that it still has certain defects and shortcomings when using it.

[0007] Specifically, on the one hand, when the upper end of the corresponding lower ejector rod frequently moves up and down in the provided active cavity, the top of the corresponding lower ejector rod is likely to frequently touch the top surface of the corresponding active cavity, resulting in that the top of the corresponding lower ejector rod and the top surface of the corresponding active cavity are susceptible to wear, resulting in a short service life of both. When the top of the corresponding lower ejector rod and the top surface of the corresponding active cavity are worn, the depth of the corresponding active cavity in the up and down directions will be increased, so that the movement stroke of the corresponding lower ejector rod in the up and down directions will change, so that the lower end thereof will not be able to open or close the corresponding step surface and the corresponding glue outlet hole well, so that the overall stability and reliability of the use of the related volume valve device will be poor. On the other hand, when it is used to discharge glue quantitatively, because the step surface is closed and the glue outlet hole is opened synchronously, thereafter, the second driving member provided will be used to control its closeness. The sealing head descends along the second chamber to force the glue to be discharged from the glue outlet. There is a slight time difference between the time when the glue outlet is opened and the time when the second driving member controls the sealing plug to descend along the second chamber. This causes a trace amount of glue to be discharged from the glue outlet and contact the elastic buffer provided at the bottom before being compressed. Since the glue has a certain corrosiveness, when the contact time with the elastic buffer accumulates and becomes longer, the corrosion of the elastic buffer is also likely to be accelerated, so that the service life of the elastic buffer is also short. At the same time, the sealing of the corresponding active cavity is not very good. When glue is injected into the corresponding active cavity and a trace amount of glue is discharged from the glue outlet before being compressed, the quantitative determination and discharge amount of glue each time are not accurate enough, so that the precise output of the glue amount cannot be achieved in a true sense.

[0008] In this regard, the inventor of this patent combined his work experience, conducted in-depth thinking on the problems encountered in the work, read a large amount of scientific research materials and literature, and through retrieval and novelty search, gradually conceived and designed this application to solve the relevant technical problems. Summary of the invention

[0009] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the purpose of the present invention is to provide a volumetric valve device for controlling the precise quantitative output of glue.

[0010] To achieve one of the above purposes, a volumetric valve device for controlling precise quantitative output of glue according to an embodiment of the present invention includes:

[0011] The valve body; the left part of the valve body is provided with a first chamber, a second chamber and a third chamber which are connected from top to bottom in sequence; the right part of the valve body is provided with a fourth chamber in the vertical direction; a U-shaped glue storage channel which connects the bottom of the third chamber and the bottom of the fourth chamber is provided between them; a glue inlet hole is opened outwardly on the side wall of the third chamber; a glue outlet hole is opened downwardly on the left bottom of the U-shaped glue storage channel;

[0012] Valve stem A; the valve stem A is arranged from top to bottom in the first chamber, the second chamber, the third chamber, the left part of the U-shaped glue storage channel and the glue outlet hole, and its outer diameter is smaller than the inner diameter of the left part of the U-shaped glue storage channel, so that a glue flow channel is formed between its outer wall and the inner wall of the left part of the U-shaped glue storage channel;

[0013] A driving member A; the driving member A is disposed in the first chamber and connected to the upper portion of the valve stem A to control the up and down movement of the valve stem A to correspondingly close / open the upper portion of the glue outlet hole;

[0014] The valve sleeve is movable up and down and is arranged outside the valve stem A and is located in the second chamber and the third chamber, and its lower end extends into the glue flow channel;

[0015] A driving member B; the driving member B is disposed in the second chamber and connected to the upper portion of the valve sleeve to control the up and down movement of the valve sleeve to correspondingly open / close the upper portion of the glue flow channel;

[0016] Valve stem B; the upper end of the valve stem B is located in the fourth chamber, and the lower end is inserted into the upper right part of the U-shaped glue storage channel;

[0017] The driving member C is arranged in the fourth chamber, and is used to control the valve stem B to move downward by a preset stroke when the glue outlet hole is opened and the glue flow channel is closed, so as to accurately and quantitatively extrude the glue stored in the U-shaped glue storage channel from the glue outlet hole.

[0018] In addition, the volumetric valve device for controlling the precise quantitative output of glue according to the above embodiment of the present invention may also have the following additional technical features:

[0019] According to one embodiment of the present invention, a through groove A suitable for the valve stem A to pass through with interference fit is vertically opened between the bottom of the first chamber and the top of the second chamber;

[0020] A sealing ring A is clamped in the through groove A and is tightly sleeved outside the valve stem A and does not move up and down with the valve stem A.

[0021] According to one embodiment of the present invention, a through groove B suitable for the valve sleeve to pass through with interference fit is vertically opened between the bottom of the second chamber and the top of the third chamber;

[0022] A sealing ring B is clamped in the through groove B and is tightly sleeved outside the valve sleeve and does not move up and down with the valve sleeve.

[0023] According to one embodiment of the present invention, the outer wall of the valve stem A is provided with a sealing ring C adapted to abut against the inner wall of the valve sleeve;

[0024] When the valve sleeve moves up and down to correspondingly open / close the upper part of the glue flow channel, the inner wall thereof is tightly against the outer peripheral edge of the sealing ring C.

[0025] According to one embodiment of the present invention, a sealing ring D is mounted in the lower part of the third chamber;

[0026] The lower end of the valve sleeve is cut inward to form a pointed sealing portion. When the driving member B controls the valve sleeve to move downward by a preset stroke, the pointed sealing portion is inserted into the sealing ring D, and its outer wall is tightly against the inner periphery of the sealing ring D to close the glue flow channel.

[0027] According to one embodiment of the present invention, the inner diameter of the lower part of the glue outlet hole is larger than the inner diameter of the upper part thereof, and a sealing ring E is clamped in the upper part thereof;

[0028] The lower end of the valve stem A protrudes outward to form a conical sealing portion that is limited at the lower part of the glue outlet hole. When the driving member A controls the valve stem A to move upward by a preset stroke, the upper end of the conical sealing portion extends into the sealing ring E, and its outer wall tightly abuts against the inner periphery of the sealing ring E to close the glue outlet hole.

[0029] According to one embodiment of the present invention, the outer wall of the lower end of the valve stem B is sleeved with a sealing ring F adapted to abut against the inner wall of the right part of the U-shaped glue storage channel.

[0030] According to one embodiment of the present invention, it also includes a glue inlet pipe for introducing glue;

[0031] The glue inlet pipe is arranged outside the valve body, and the connecting end thereof is connected to the glue inlet hole.

[0032] According to one embodiment of the present invention, it also includes an anti-rotation nut for adjusting the downward movement stroke of the conical sealing portion to control the opening range of the glue outlet hole;

[0033] A through groove C is formed at the top left side of the valve body and passes through the first chamber. A sealing ring G adapted to the outer wall of the valve stem A is clamped at the bottom of the through groove C. The anti-rotation nut is threadedly screwed on the upper inner part of the through groove C, and a movable groove is formed vertically therein and passes through the upper and lower end surfaces thereof. The upper end of the valve stem A extends upward and passes through the through groove C and the movable groove with an interference fit and extends out of the upper part of the movable groove. A limiting protrusion with an outer diameter larger than the inner diameter of the movable groove is fixed on the top.

[0034] When the anti-rotation nut is screwed to move up and down along the through slot C, the gap between the top surface thereof and the bottom surface of the limiting projection is adjustable.

[0035] According to one embodiment of the present invention, it also includes a glue dispensing needle for dispensing glue;

[0036] The glue dispensing needle is arranged at the bottom of the valve body, and the upper end of the glue dispensing needle is plug-connected with the lower part of the glue outlet hole.

[0037] According to one embodiment of the present invention, the driving member A comprises a sealing piston A sleeved outside the valve stem A and a pressure relief spring A fixedly arranged at the bottom of the sealing piston A and wrapped outside the valve stem A; the lower end of the pressure relief spring A abuts against the inner bottom surface of the first chamber, and the inner bottom surface of the first chamber is provided with a gas inlet and outlet connector A extending out of the valve body for connecting to an external gas supply device;

[0038] The driving member B comprises a sealing piston B sleeved on the outside of the middle and upper part of the valve sleeve and a pressure relief spring B fixed on the top of the sealing piston B and wrapped on the outside of the upper part of the valve sleeve; the upper end of the pressure relief spring B abuts against the inner top surface of the second chamber, and the inner top surface of the second chamber is provided with a gas inlet and outlet connector B extending out of the valve body for connecting to an external gas supply device;

[0039] The driving member C is a sealing piston C sleeved on the upper part of the valve stem B; the top surface of the fourth chamber is provided with a gas inlet and outlet connector C extending out of the valve body for connecting to an external gas supply device.

[0040] The beneficial effects of the present invention are:

[0041] First, the volumetric valve device for controlling the precise quantitative output of glue provided by the present application, in specific implementation, compared with the background technology described in which the split upper push rod and lower push rod are used to control the opening and closing of the step surface (corresponding to the glue flow channel of the present application) and the glue outlet hole, the present application sets a whole valve stem A, and sets the valve sleeve to replace the whole constituted by it, and sets the driving member A and the driving member B to control the up and down movement stroke separately, so that the stability and reliability of the use of the entire volumetric valve device can be increased, that is, the present application does not have the active cavity existing in the patent described in the background technology, so that the end of the valve stem A and the end of the valve sleeve are not easy to be worn, so that they have a long service life.

[0042] Secondly, since the present application arranges the driving member A and the driving member B to separately control the up and down movement stroke of the valve stem A and the up and down movement stroke of the valve sleeve, the up and down movement strokes are relatively stable, and the corresponding glue outlet holes and the corresponding glue flow channels can be opened or closed better within the preset up and down movement strokes, so as to realize the quantitative entry of glue into the U-shaped glue storage channel, and quantitatively forced out from the U-shaped glue storage channel, and then quantitatively squeezed out from the glue outlet hole. This process is not prone to glue loss, so that the precise output of glue quantity can be achieved in a true sense.

[0043] Third, when the driving member A, the driving member B and the driving member C work separately and in coordination, the valve stem A can move downward to open the glue outlet hole, the valve sleeve can move downward to close the glue flow channel, and the valve stem C can move downward to squeeze the glue synchronously, so that there is no tiny time difference existing in the patent described in the background technology, and it is not easy to cause the problem of glue flowing out of the glue outlet hole before being compressed. In addition, the elastic buffer component existing in the patent described in the background technology is not provided at the lower end of the valve stem A described in the present application, so that there is no problem of the elastic buffer component being corroded by glue.

[0044] Fourthly, by setting the sealing ring A, the first chamber has good sealing performance and is not easy to be penetrated by glue from bottom to top, which can better protect the driving member A from being stained by glue and corroded by glue, thereby extending its service life; by setting the sealing ring B, the second chamber has good sealing performance and is not easy to be penetrated by glue from bottom to top, which can better protect the driving member B from being stained by glue and corroded by glue, thereby extending its service life; by setting the sealing ring C, the small gap between the inner wall of the valve sleeve and the outer wall of the valve stem A is not easy to be penetrated by glue from bottom to top, thereby making it difficult for glue to flow upward, thereby further ensuring quantitative and accurate output of glue; by setting the sealing ring D, the glue flow channel can be increased when it is surrounded by the pointed sealing ring. The sealing performance when the sealing part is closed is such that when the glue flow channel of the present application is closed, the glue flow channel is not easy to leak glue upward or downward, and it can also protect and isolate the glue flow channel, so that the pointed sealing part will not directly contact the upper part of the glue flow channel and damage it, making the present application more stable and reliable to use; by setting the sealing ring E, the sealing performance of the upper part of the glue outlet hole when it is closed by the conical sealing part can be increased, so that when the present application is not in use, the glue outlet hole is not easy to leak glue downward, and it can also protect and isolate the glue outlet hole, so that the conical sealing part will not directly contact the upper part of the glue outlet hole and damage it, making the present application more stable and reliable to use. By setting the sealing ring F, when the driving member C controls the valve stem B to move up and down along the right part of the U-shaped glue storage channel, the glue stored in the U-shaped glue storage channel is not easy to enter the fourth chamber, which can better protect the driving member C from being stained by glue and corroded by glue, so that its service life is long.

[0045] Fifth point, within a unit time, the amount of glue discharged downward from the glue outlet hole can be achieved by adjusting the downward movement stroke of the conical sealing part to control the opening range of the glue outlet hole. Therefore, the present application is provided with an anti-rotation nut for adjusting the downward movement stroke of the conical sealing part to control the opening range of the glue outlet hole. By adjusting the height of the anti-rotation nut, it is convenient to adjust the subsequent opening range of the glue outlet hole, so as to achieve an adjustable lower discharge amount within a unit, so that the present application is more flexible to use and can be flexibly controlled according to actual needs.

[0046] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0048] Figure 1 The overall structure of the volumetric valve device for controlling the precise quantitative output of glue according to the present invention is shown in FIG. Figure 1 ;

[0049] Figure 2 The overall structure of the volumetric valve device for controlling the precise quantitative output of glue according to the present invention is shown in FIG. Figure 2 ;

[0050] Figure 3 It is a longitudinal cross-sectional view of a volumetric valve device for controlling precise quantitative output of glue according to the present invention;

[0051] Figure 4 yes Figure 3 A longitudinal cross-sectional view of the volumetric valve device for controlling the precise quantitative output of glue of the present invention when the valve stem A, the driving member A, the valve sleeve, the driving member B, the valve stem B and the driving member C are removed;

[0052] Figure 5 is a longitudinal cross-sectional view of the valve stem A, the driving member A, the valve sleeve and the driving member B connected together in an embodiment of the present invention;

[0053] Figure 6 is a longitudinal cross-sectional view of the valve stem B and the driving member C connected together in an embodiment of the present invention;

[0054] Figure 7It is a partial exploded view of the volumetric valve device for controlling the precise quantitative output of glue according to the present invention;

[0055] Reference numerals:

[0056] A volumetric valve device 1000 for controlling the precise quantitative output of glue;

[0057] Valve body 10;

[0058] The first chamber 101; the second chamber 102; the third chamber 103; the fourth chamber 104; the U-shaped glue storage channel 105; the glue flow channel 1051; the glue inlet hole 106; the glue outlet hole 107; the through groove A108; the sealing ring A109; the through groove B110; the sealing ring B111; the sealing ring D112; the sealing ring E113; the through groove C114; the sealing ring G115; the gas inlet and outlet connector A116; the gas inlet and outlet connector B117; the gas inlet and outlet connector C118; the sealing plug body A119; the sealing plug body B120; the clamping ring 121; the clamping mouth 1211;

[0059] Valve stem A20;

[0060] Sealing ring C201; conical sealing portion 202; limiting protrusion 203;

[0061] Driving member A30;

[0062] Sealing piston A301; pressure relief spring A302;

[0063] Valve sleeve 40;

[0064] A pointed sealing portion 401;

[0065] Driving member B50;

[0066] Sealing piston B501; pressure relief spring B502;

[0067] Valve stem B60;

[0068] Sealing ring F601;

[0069] Driving member C70;

[0070] Glue inlet pipe 80;

[0071] Anti-rotation nut 90;

[0072] Movable groove 901; threaded section 902; anti-rotation section 903; rotation groove 9031; screwing section 904; scale mark 9041; wrapping spring 905; movable limit rod 906;

[0073] Dispensing needle 100;

[0074] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0075] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the drawings of the specification, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present invention, but cannot be understood as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0076] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “circumferential”, “radial”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the drawings of the specification, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0077] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0078] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0079] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0080] The following describes in detail a volumetric valve device 1000 for controlling precise quantitative output of glue according to an embodiment of the present invention with reference to the accompanying drawings.

[0081] Reference Figures 1 to 7 As shown, the volumetric valve device 1000 for controlling the precise quantitative output of glue provided in accordance with an embodiment of the present invention comprises a valve body 10, a valve stem A20, a driving member A30, a valve sleeve 40, a driving member B50, a valve stem B60 and a driving member C70;

[0082] Among them, especially the comparison Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the left part of the valve body 10 is provided with a first chamber 101, a second chamber 102 and a third chamber 103 which are connected from top to bottom in sequence; the right part of the valve body 10 is provided with a fourth chamber 104 vertically; a U-shaped glue storage channel 105 which connects the bottom of the third chamber 103 and the bottom of the fourth chamber 104 is provided between them; a glue inlet hole 106 is opened outwardly on the side wall of the third chamber 103; and a glue outlet hole 107 is opened downwardly at the left bottom of the U-shaped glue storage channel 105;

[0083] On this basis, the valve stem A20 is arranged from top to bottom in the first chamber 101, the second chamber 102, the third chamber 103, the left part of the U-shaped glue storage channel 105 and the glue outlet hole 107, and its outer diameter is smaller than the inner diameter of the left part of the U-shaped glue storage channel 105, so that a glue flow channel 1051 is formed between its outer wall and the inner wall of the left part of the U-shaped glue storage channel 105;

[0084] On this basis, the driving member A30 is disposed in the first chamber 101 and connected to the upper portion of the valve stem A20 to control the up and down movement of the valve stem A20 to correspondingly close / open the upper portion of the glue outlet hole 107;

[0085] On this basis, the valve sleeve 40 is movably mounted outside the valve stem A20 and is located in the second chamber 102 and the third chamber 103, with its lower end extending into the glue flow channel 1051;

[0086] On this basis, the driving member B50 is disposed in the second chamber 102 and connected to the upper portion of the valve sleeve 40 to control the up and down movement of the valve sleeve 40 to correspondingly open / close the upper portion of the glue flow channel 1051;

[0087] On this basis, the upper end of the valve stem B60 is located in the fourth chamber 104, and the lower end is inserted into the upper right part of the U-shaped glue storage channel 105;

[0088] On this basis, the driving member C70 is arranged in the fourth chamber 104, and is used to control the valve stem B60 to move downward by a preset stroke when the glue outlet hole 107 is opened and the glue flow channel 1051 is closed, so as to accurately and quantitatively squeeze the glue stored in the U-shaped glue storage channel 105 out of the glue outlet hole 107.

[0089] Based on the above, it can be clearly seen that, in specific implementation, the present application is mainly used as a volumetric valve device 1000 for controlling the precise quantitative output of glue.

[0090] Specifically, when applying the present application, the present application is assembled according to the above-mentioned structure, and the internal gas of the valve body 10 described in the present application is discharged in advance, and the valve stem A20 is controlled by the driving component A30 to move upward by a preset stroke to close the upper part of the glue outlet hole 107, and the valve sleeve 40 is controlled by the driving component B50 to move upward by a preset stroke to open the glue flow channel 1051. In this way, the glue to be used can be squeezed into the third chamber 103 through the glue inlet hole 106, and enter the U-shaped glue storage channel 105 along the glue flow channel 1051.

[0091] Subsequently, when the required amount of glue is stored in the U-shaped glue storage channel 105, the valve sleeve 40 is controlled by the driving component B50 to move downward by a preset stroke to close the upper part of the glue flow channel 1051. Then, when it is necessary to dispense glue on the product surface, the valve stem A20 is controlled by the driving component A30 to move downward by a preset stroke to open the upper part of the glue outlet hole 107. Simultaneously, the valve stem B60 is controlled by the driving component C70 to move downward by a preset stroke. In this way, the required amount of glue stored in the U-shaped glue storage channel 105 can be accurately and quantitatively squeezed out from the glue outlet hole 107 to the product surface to achieve dispensing.

[0092] The use of the above-mentioned application will obviously have the following technical effects:

[0093] On the one hand, compared with the background technology described in which a split upper push rod and a lower push rod are used to control the opening and closing of the step surface (corresponding to the glue flow channel 1051 of this application) and the glue outlet hole 107, the present application sets a whole valve stem A20, and sets the valve sleeve 40 to replace the whole constituted by it, and sets the driving member A30 and the driving member B50 to control the up and down movement strokes separately, so that the stability and reliability of the use of the entire volumetric valve device can be increased, that is, the present application does not have the active cavity existing in the patent described in the background technology, so that the end of the valve stem A20 and the end of the valve sleeve 40 are not easy to be worn, so that they have a long service life.

[0094] On the other hand, since the present application arranges the driving member A30 and the driving member B50 to separately control the up and down movement stroke of the valve stem A20 and the up and down movement stroke of the valve sleeve 40, the up and down movement strokes are relatively stable, and the corresponding glue outlet hole 107 and the corresponding glue flow channel 1051 can be opened or closed better within the preset up and down movement strokes, so as to realize the quantitative entry of glue into the U-shaped glue storage channel 105, and quantitatively forced out from the U-shaped glue storage channel 105, and then quantitatively squeezed out from the glue outlet hole 107. In this process, it is not easy for glue to be lost, so that the precise output of glue quantity can be realized in a true sense.

[0095] Furthermore, when the driving member A30, the driving member B50 and the driving member C70 work separately and in coordination, the valve stem A20 can move downward to open the glue outlet hole 107, the valve sleeve 40 can move downward to close the glue flow channel 1051, and the valve stem C can move downward to squeeze the glue synchronously, so that there is no slight time difference existing in the patent described in the background technology, and it is not easy to cause the problem of glue flowing out of the glue outlet hole 107 before being squeezed. In addition, the elastic buffer component existing in the patent described in the background technology is not provided at the lower end of the valve stem A20 of the present application, so that there is no problem of the elastic buffer component being corroded by glue.

[0096] Furthermore, through the above-mentioned optimized design, the overall structure of the present application is highly practical and has good use effect.

[0097] Furthermore, in the specific implementation, Figure 3 and Figure 4 As shown, according to one embodiment of the present invention, a through groove A108 suitable for the valve stem A20 to pass through by interference fit is vertically opened between the bottom of the first chamber 101 and the top of the second chamber 102;

[0098] Among them, a sealing ring A109 is clamped in the through groove A108, which is tightly mounted outside the valve stem A20 and does not move up and down with the valve stem A20.

[0099] In this way, the first chamber 101 and the second chamber 102 are connected without affecting the up and down movement of the valve stem A20, and the first chamber 101 has good sealing performance and is not easy to get glue from bottom to top, which can better protect the driving part A30 from being stained by glue and corroded by glue, thereby extending its service life.

[0100] Furthermore, in the specific implementation, continue to compare Figure 3 and Figure 4 As shown, according to one embodiment of the present invention, a through groove B110 suitable for the valve sleeve 40 to pass through by interference fit is vertically opened between the bottom of the second chamber 102 and the top of the third chamber 103;

[0101] A sealing ring B111 which is tightly mounted on the outside of the valve sleeve 40 and does not move up and down with the valve sleeve 40 is clamped in the through groove B110 .

[0102] In this way, the connection between the second chamber 102 and the third chamber 103 does not affect the up and down movement of the valve stem A20, and the second chamber 102 has good sealing performance and is not easy to get glue from bottom to top. It can better protect the driving part B50 from being stained by glue and corroded by glue, thereby extending its service life.

[0103] Furthermore, in the specific implementation, Figure 3 and Figure 5 As shown, according to one embodiment of the present invention, the outer wall of the valve stem A20 has a sealing ring C201 adapted to abut against the inner wall of the valve sleeve 40;

[0104] When the valve sleeve 40 moves up and down to correspondingly open / close the upper portion of the glue flow channel 1051 , the inner wall thereof is tightly against the outer peripheral edge of the sealing ring C201 .

[0105] As a result, the small gap between the inner wall of the valve sleeve 40 and the outer wall of the valve stem A20 is not easy to get glue in from bottom to top, so that the glue is not easy to flow upward, which can further ensure the quantitative and accurate output of glue.

[0106] In addition, in this technical solution, Figure 3 and Figure 4 As shown, according to one embodiment of the present invention, a sealing ring D112 is mounted in the lower part of the third chamber 103;

[0107] Among them, the lower end of the valve sleeve 40 is cut inward to form a pointed sealing portion 401. When the driving member B50 controls the valve sleeve 40 to move downward a preset stroke, the pointed sealing portion 401 is inserted into the sealing ring D112, and its outer wall is tightly against the inner periphery of the sealing ring D112 to close the glue flow channel 1051.

[0108] Therefore, by providing the sealing ring D112, the sealing performance of the glue flow channel 1051 can be increased when it is closed by the pointed sealing portion 401, so that when the glue flow channel 1051 of the present application is closed, the glue flow channel 1051 is not easy to leak glue upward or downward, and it can also protect and isolate the glue flow channel 1051, so that the pointed sealing portion 401 will not directly contact the upper part of the glue flow channel 1051 and damage it, making the present application more stable and reliable to use.

[0109] Furthermore, in this technical solution, continue to compare Figure 3 and Figure 4 As shown, according to one embodiment of the present invention, the inner diameter of the lower part of the glue outlet hole 107 is larger than the inner diameter of the upper part thereof, and a sealing ring E113 is clamped in the upper part thereof;

[0110] Among them, the lower end of the valve stem A20 protrudes outward to form a conical sealing portion 202 which is limited at the lower inner part of the glue outlet hole 107. When the driving member A30 controls the valve stem A20 to move upward for a preset stroke, the upper end of the conical sealing portion 202 extends into the sealing ring E113, and its outer wall is tightly against the inner periphery of the sealing ring E113 to close the upper inner part of the glue outlet hole 107.

[0111] Therefore, by setting the sealing ring E113, the sealing performance of the upper inner part of the glue outlet hole 107 can be increased when it is closed by the conical sealing part 202, so that when the present application is not in use, the glue outlet hole 107 is not easy to leak glue downwards, and it can also play a role in protecting and isolating the glue outlet hole 107, so that the conical sealing part 202 will not directly contact the upper inner part of the glue outlet hole 107 and damage it, making the present application more stable and reliable to use.

[0112] Again, in the specific implementation, Figure 3 and Figure 6 As shown, according to one embodiment of the present invention, the outer wall of the lower end of the valve stem B60 is sleeved with a sealing ring F601 adapted to abut against the inner wall of the right part of the U-shaped glue storage channel 105.

[0113] Therefore, when the valve stem B60 is controlled by the driving component C70 to move up and down along the right part of the U-shaped glue storage channel 105, the glue stored in the U-shaped glue storage channel 105 is not easy to enter the fourth chamber 104, which can better protect the driving component C70 from being stained by glue and corroded by glue, thereby extending its service life.

[0114] Furthermore, in this technical solution, Figure 1 , Figure 2 and Figure 3As shown, according to one embodiment of the present invention, the present invention further comprises a glue inlet pipe 80 for introducing glue;

[0115] The glue inlet pipe 80 is arranged outside the valve body 10 , and its connecting end is connected to the glue inlet hole 106 .

[0116] Therefore, by connecting a glue storage container such as a glue barrel pre-filled with glue through the glue inlet pipe 80, a set amount of glue can be introduced into the U-shaped glue storage channel 105 of the present application to achieve quantitative and accurate output of glue during subsequent use.

[0117] And in this technical solution, continue to compare Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, according to one embodiment of the present invention, the present invention further comprises an anti-rotation nut 90 for adjusting the downward movement stroke of the conical blocking portion 202 to control the opening range of the glue outlet hole 107;

[0118] Among them, a through groove C114 is opened on the top left side of the valve body 10 and passes through the first chamber 101, and a sealing ring G115 adapted to the outer wall of the valve stem A20 is clamped on the bottom of the through groove C114; the anti-rotation nut 90 is threadedly screwed on the upper inner part of the through groove C114, and a movable groove 901 is opened vertically inside it and passes through its upper and lower end surfaces; the upper end of the valve stem A20 extends upward and passes through the through groove C114 and the movable groove 901 with an interference fit and extends out of the upper part of the movable groove 901, and a limiting protrusion 203 with an outer diameter larger than the inner diameter of the movable groove 901 is fixed on its top.

[0119] When the anti-rotation nut 90 is screwed to move up and down along the through slot C114, the gap between the top surface thereof and the bottom surface of the limiting protrusion 203 is adjustable.

[0120] In this regard, it is clear that, within a unit time, the amount of glue discharged downward from the glue outlet hole 107 can be achieved by adjusting the downward movement stroke of the conical sealing portion 202 to control the opening range of the glue outlet hole 107. Therefore, the present application is provided with the anti-rotation nut 90 for adjusting the downward movement stroke of the conical sealing portion 202 to control the opening range of the glue outlet hole 107.

[0121] For example, at the beginning, the anti-rotation nut 90 is at a relatively high position, so that the gap between its upper top surface and the lower bottom surface of the limiting protrusion 203 is very small. In this case, the valve stem A20 is controlled by the driving member A30 to drive the conical sealing portion 202 to move downward until the lower bottom surface of the limiting protrusion 203 reaches the upper top surface of the anti-rotation nut 90 at a relatively high position. At this time, the valve stem A20 can no longer continue to drive the conical sealing portion 202 to move downward, so that the downward movement stroke of the conical sealing portion 202 will be very small, so that the opening amplitude of the glue outlet hole 107 is small, so that the glue outlet amount per unit time is relatively small.

[0122] On the contrary, in the initial state, the anti-rotation nut 90 is screwed on to lower its height position. At this time, the gap between its upper top surface and the lower bottom surface of the limiting protrusion 203 will become larger. In this case, the valve stem A20 is controlled by the driving member A30 to drive the conical sealing portion 202 to move downward until the lower bottom surface of the limiting protrusion 203 reaches the upper top surface of the anti-rotation nut 90 which is in a lowered height position. At this time, the valve stem A20 can no longer drive the conical sealing portion 202 to move downward. However, in this case, the downward movement stroke of the conical sealing portion 202 will be very large, so that the glue outlet hole 107 opens to a large extent, resulting in a large amount of glue discharged per unit time.

[0123] Therefore, it can be clearly seen that by adjusting the height of the anti-rotation nut 90, the subsequent opening range of the glue outlet hole 107 can be adjusted to achieve adjustable lower outlet range between units, so that the application is more flexible to use and can be flexibly controlled according to actual needs.

[0124] At the same time, in this technical solution, or reference Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, according to one embodiment of the present invention, the present invention further comprises a dispensing needle 100 for dispensing glue;

[0125] The glue dispensing needle 100 is arranged at the bottom of the valve body 10 , and the upper end thereof is detachably plug-connected with the lower part of the glue outlet hole 107 .

[0126] Therefore, by providing the dispensing needle, it is convenient to discharge glue from the lower end to the surface of the product to achieve dispensing, and because it is detachable, it is also convenient for maintenance and replacement.

[0127] And preferably, in the specific implementation, the control Figure 3 and Figure 5As shown, according to one embodiment of the present invention, the driving member A30 includes a sealing piston A301 sleeved outside the valve stem A20 and a pressure-relief spring A302 fixedly arranged at the bottom of the sealing piston A301 and enclosed outside the valve stem A20; the lower end of the pressure-relief spring A302 abuts against the inner bottom surface of the first chamber 101, and the inner bottom surface of the first chamber 101 is provided with a gas inlet and outlet connector A116 extending out of the valve body 10 for connecting to an external gas supply device; the driving member B50 includes a sealing piston B501 sleeved outside the middle and upper part of the valve sleeve 40 and a pressure-relief spring B502 fixedly arranged at the top of the sealing piston B501 and enclosed outside the upper part of the valve sleeve 40; the upper end of the pressure-relief spring B502 abuts against the inner top surface of the second chamber 102, and the inner top surface of the second chamber 102 is provided with a gas inlet and outlet connector B117 extending out of the valve body 10 for connecting to an external gas supply device;

[0128] Comparison Figure 3 and Figure 6 As shown, the driving member C70 is a sealing piston C sleeved on the upper part of the valve stem B60; the top surface of the fourth chamber 104 is provided with a gas inlet and outlet connector C118 extending out of the valve body 10 for connecting to an external gas supply device.

[0129] In this regard, it can be made clear that in the present application, the driving member A30, the driving member B50 and the driving member C70 are all driven by an external air supply device, so that the sealing piston A301 of the driving member A30 can drive the valve stem A20 to move up and down to achieve the corresponding closing / opening of the glue outlet hole 107, and the sealing piston B501 of the driving member B50 can drive the valve sleeve 40 to move up and down to achieve the corresponding opening / closing of the glue flow channel 1051, and the sealing piston C of the driving member C70 can drive the valve stem B60 to move downward, so as to achieve the precise and quantitative extrusion of the required amount of glue stored in the U-shaped glue storage channel 105 from the glue outlet hole 107 to the product surface for dispensing.

[0130] During this process, when the sealing piston A301 of the driving member A30 drives the valve stem A20 to move downward by a preset stroke to open the glue outlet hole 107, the pressure relief spring A302 is provided to provide pressure relief in the opposite direction, so that the sealing piston A301 does not directly hit the lower bottom surface of the first chamber 101, thereby ensuring that the sealing piston A301 is well protected.

[0131] Similarly, when the sealing piston B501 of the driving member B50 drives the valve sleeve 40 to move upward a preset stroke to open the rubber flow channel 1051, the pressure relief spring B502 is provided to provide pressure relief in the opposite direction, so that the sealing piston B501 will not directly hit the top surface of the second chamber 102, thereby ensuring that the sealing piston B501 is well protected.

[0132] Furthermore, through the above-mentioned optimization design, the overall use effect of the present application can be effectively improved.

[0133] It should be added that in the specific implementation, Figure 3 and Figure 4 As shown, according to the volumetric valve device 1000 for controlling the precise quantitative output of glue provided by the embodiment of the present invention, the outer wall of the valve body 10 is provided with a maintenance port A which is opened horizontally to the bottom of the U-shaped glue storage channel 105 and is located just to the left of the bottom of the U-shaped glue storage channel 105, and is provided vertically with a maintenance port B which is opened vertically to the right part of the U-shaped glue storage channel 105 and is located just below the right part of the U-shaped glue storage channel 105;

[0134] Among them, a sealing plug body A119 is detachably inserted in the maintenance port A, and a sealing plug body B120 is detachably inserted in the maintenance port B.

[0135] In this way, when the cleaning liquid is poured into the glue inlet hole 106, it is convenient to clean and maintain the third chamber 103 and the left part of the U-shaped glue storage channel 105. When the sealing plug body A119 is removed, it is convenient to pour the cleaning liquid to the bottom of the U-shaped glue storage channel 105 to clean and maintain the bottom of the U-shaped glue storage channel 105. When the sealing plug body B120 is removed, it is convenient to pour the cleaning liquid to the right part of the U-shaped glue storage channel 105 to clean and maintain the right part of the U-shaped glue storage channel 105. This makes it more convenient to use the present application flexibly. For example, when the present application is used to accurately and quantitatively output different glues, the third chamber 103 and the U-shaped glue storage channel 105 can be cleaned and maintained before changing the glue.

[0136] It is further necessary to add that in the specific implementation, Figure 1 , Figure 2 and Figure 7 As shown, according to the volumetric valve device 1000 for controlling the precise quantitative output of glue provided by the embodiment of the present invention, the anti-rotation nut 90 is divided from bottom to top into a threaded section 902, an anti-rotation section 903 and a screwing section 904 whose outer diameter is larger than the outer diameter of the anti-rotation section, and has a wrapping spring 905 and a movable limiting rod 906;

[0137] The threaded section 902 is screwed on the inner upper part of the through groove C114, and the outer wall of the anti-rotation section 903 is evenly provided with a plurality of rotation grooves 9031 in the vertical direction; a clamping ring 121 is convexly provided on the top of the left side of the valve body 10 just above the through groove C114, and the wrapping spring 905 is sleeved outside the clamping ring 121 with an interference fit, and the outer wall of the clamping ring 121 is vertically provided with a bayonet 1211 for the vertical interference fit of the movable limit rod;

[0138] Initially, the partial outer wall of the outer half of the movable limiting rod 906 is against the inner wall of the wrapping spring 905, and the inner half is stuck in one of the rotating grooves 9031; when the screwing section 904 is rotated with force, the movable limiting rod 906 presses the wrapping spring 905 outward, and can be rotated from one of the rotating grooves 9031 to be stuck in another rotating groove 9031 that is opposite to its position. In this way, the anti-rotation nut 90 can be rotated to the required range, and under the coordinated action of the wrapping spring 905, the movable limiting rod 906, the rotating groove 9031 and the bayonet 1211, it can maintain the relevant rotation range when no force is continued to be applied to rotate it, so that it has higher stability in use.

[0139] Moreover, in a preferred embodiment, the outer wall of the screwing section 904 is provided with a numerical scale mark 9041 for indicating the rotation amplitude, so that the user can know the rotation amplitude of the anti-rotation nut 90 when screwing it by visually observing the corresponding scale mark 9041, making the anti-rotation nut 90 described in the present application more intuitive and clear when used.

[0140] Other embodiments and the like are not described here by way of example.

[0141] To summarize, the volumetric valve device 1000 for controlling the precise quantitative output of glue provided by the present application, in its specific implementation, compared with the background technology described in which the split upper push rod and lower push rod are used to control the opening and closing of the step surface (corresponding to the glue flow channel 1051 of the present application) and the glue outlet hole 107, the present application sets a whole valve stem A20, and sets the valve sleeve 40 to replace the whole constituted by it, and sets the driving member A30 and the driving member B50 to control the up and down movement strokes separately, so that the stability and reliability of the use of the entire volumetric valve device can be increased, that is, the present application does not have the active cavity existing in the patent described in the background technology, so that the end of the valve stem A20 and the end of the valve sleeve 40 are not easy to be worn, so that they have a long service life.

[0142] Furthermore, since the present application arranges the driving member A30 and the driving member B50 to separately control the up and down movement stroke of the valve stem A20 and the up and down movement stroke of the valve sleeve 40, the up and down movement strokes thereof are relatively stable, and the corresponding glue outlet hole 107 and the corresponding glue flow channel 1051 can be opened or closed better within the preset up and down movement strokes, so as to realize the quantitative entry of glue into the U-shaped glue storage channel 105, and quantitatively forced out from the U-shaped glue storage channel 105, and then quantitatively squeezed out from the glue outlet hole 107. In this process, it is not easy for glue to be lost, so that the precise output of glue quantity can be realized in a true sense.

[0143] When the driving member A30, the driving member B50 and the driving member C70 work separately and in coordination, the valve stem A20 can move downward to open the glue outlet hole 107, the valve sleeve 40 can move downward to close the glue flow channel 1051, and the valve stem C can move downward to squeeze the glue synchronously, so that there is no slight time difference existing in the patent described in the background technology, and it is not easy to cause the problem of glue flowing out of the glue outlet hole 107 before being squeezed. In addition, the elastic buffer component existing in the patent described in the background technology is not arranged at the lower end of the valve stem A20 of the present application, so that there is no problem of the elastic buffer component being corroded by glue.

[0144] In addition, by setting the sealing ring A109, the first chamber 101 has good sealing performance and is not easy to be penetrated by glue from bottom to top, which can better protect the driving component A30 from being stained by glue and corroded by glue, thereby extending its service life; by setting the sealing ring B111, the second chamber 102 has good sealing performance and is not easy to be penetrated by glue from bottom to top, which can better protect the driving component B50 from being stained by glue and corroded by glue, thereby extending its service life; by setting the sealing ring C201, the small gap between the inner wall of the valve sleeve 40 and the outer wall of the valve stem A20 is not easy to be penetrated by glue from bottom to top, so that the glue is not easy to flow upward, which can further ensure the quantitative and precise output of glue; by setting the sealing ring D112, the glue flow channel 1051 can be increased when it is closed by the pointed sealing portion 401 The sealing performance is improved so that when the glue flow channel 1051 described in the present application is closed, the glue flow channel 1051 is not easy to leak glue upward or downward, and it can also protect and isolate the glue flow channel 1051, so that the pointed sealing part 401 will not directly contact the upper part of the glue flow channel 1051 and damage it, making the present application more stable and reliable to use; by setting the sealing ring E113, the sealing performance of the upper inner part of the glue outlet hole 107 when it is closed by the conical sealing part 202 can be increased, so that when the present application is not in use, the glue outlet hole 107 is not easy to leak glue downward, and it can also protect and isolate the glue outlet hole 107, so that the conical sealing part 202 will not directly contact the upper inner part of the glue outlet hole 107 and damage it, making the present application more stable and reliable to use. By setting the sealing ring F601, when the driving component C70 controls the valve stem B60 to move up and down along the right part of the U-shaped glue storage channel 105, the glue stored in the U-shaped glue storage channel 105 is not easy to enter the fourth chamber 104, which can better protect the driving component C70 from being stained by glue and corroded by glue, thereby extending its service life.

[0145] Furthermore, within a unit time, the amount of glue discharged downward from the glue outlet hole 107 can be achieved by adjusting the downward movement stroke of the conical sealing portion 202 to control the opening range of the glue outlet hole 107. Therefore, the present application is provided with an anti-rotation nut 90 for adjusting the downward movement stroke of the conical sealing portion 202 to control the opening range of the glue outlet hole 107. By adjusting the height of the anti-rotation nut 90, it is convenient to adjust the subsequent opening range of the glue outlet hole 107 to achieve an adjustable lower discharge amount within a unit, so that the present application is more flexible to use and can be flexibly controlled according to actual needs.

[0146] Furthermore, the volumetric valve device 1000 for controlling the precise quantitative output of glue provided by the present application is indeed extremely practical and has excellent use effects, which makes the present application inevitably have a good market promotion value, and the present application is also bound to be very popular and will be effectively popularized.

[0147] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0148] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A volumetric valve device for controlling the precise quantitative output of glue, characterized in that: include: Valve body; the left part of the valve body is provided with the first chamber, the second chamber and the third chamber which are connected from top to bottom in sequence; the right part of the valve body is provided with the fourth chamber vertically; a U-shaped glue storage channel which connects the bottom of the third chamber and the bottom of the fourth chamber is provided between them; a glue inlet hole is opened outward on the side wall of the third chamber; a glue outlet hole is opened downward on the left bottom of the U-shaped glue storage channel; Valve stem A; Valve stem A is arranged from top to bottom in the first chamber, the second chamber, the third chamber, the left part of the U-shaped glue storage channel and the glue outlet hole, and its outer diameter is smaller than the inner diameter of the left part of the U-shaped glue storage channel, so that a glue flow channel is formed between its outer wall and the inner wall of the left part of the U-shaped glue storage channel; Driving member A; the driving member A is disposed in the first chamber and connected to the upper portion of the valve stem A to control the up and down movement of the valve stem A to correspondingly close / open the upper portion of the glue outlet hole; The valve sleeve is movable up and down and is arranged outside the valve stem A and is located in the second chamber and the third chamber, and its lower end extends into the rubber flow channel; A driving member B is disposed in the second chamber and connected to the upper portion of the valve sleeve to control the up and down movement of the valve sleeve to correspondingly open / close the upper portion of the glue flow channel; Valve stem B; the upper end of valve stem B is located in the fourth chamber, and the lower end is inserted into the upper right part of the U-shaped glue storage channel; Driving member C; The driving member C is arranged in the fourth chamber, and is used to control the valve stem B to move downward by a preset stroke when the glue outlet is opened and the glue flow channel is closed, so as to accurately and quantitatively squeeze out the glue stored in the U-shaped glue storage channel from the glue outlet.

2. The volumetric valve device for controlling the precise quantitative output of glue according to claim 1, characterized in that: A through groove A suitable for the valve stem A to pass through with interference fit is vertically opened between the bottom of the first chamber and the top of the second chamber; A sealing ring A is clamped in the through groove A and is tightly sleeved outside the valve stem A and does not move up and down with the valve stem A.

3. The volumetric valve device for controlling the precise quantitative output of glue according to claim 1, characterized in that: A through groove B suitable for the valve sleeve to pass through with interference fit is vertically opened between the bottom of the second chamber and the top of the third chamber; a sealing ring B tightly sleeved outside the valve sleeve and not moving up and down with the valve sleeve is clamped in the through groove B; The outer wall of the valve stem A is provided with a sealing ring C adapted to abut against the inner wall of the valve sleeve; when the valve sleeve moves up and down to correspondingly open / close the upper part of the rubber flow channel, its inner wall is tightly against the outer periphery of the sealing ring C.

4. The volumetric valve device for controlling the precise quantitative output of glue according to claim 1, characterized in that: A sealing ring D is mounted in the lower part of the third chamber; The lower end of the valve sleeve is cut inward to form a pointed sealing portion. When the driving member B controls the valve sleeve to move downward to a preset stroke, the pointed sealing portion is inserted into the sealing ring D, and its outer wall is tightly against the inner periphery of the sealing ring D to close the glue flow channel.

5. The volumetric valve device for controlling the precise quantitative output of glue according to claim 1, characterized in that: The inner diameter of the lower part of the glue outlet hole is larger than the inner diameter of the upper part, and a sealing ring E is clamped in the upper part; The lower end of the valve stem A protrudes outward to form a conical sealing portion that is limited in the lower part of the glue outlet hole. When the driving member A controls the valve stem A to move upward by a preset stroke, the upper end of the conical sealing portion extends into the sealing ring E, and its outer wall is tightly against the inner periphery of the sealing ring E to close the glue outlet hole.

6. The volumetric valve device for controlling the precise quantitative output of glue according to claim 1, characterized in that: The outer wall of the lower end of the valve stem B is sleeved with a sealing ring F adapted to abut against the inner wall of the right part of the U-shaped glue storage channel.

7. The volumetric valve device for controlling the precise quantitative output of glue according to claim 1, characterized in that: Also includes a glue inlet pipe for introducing glue; The rubber inlet pipe is arranged outside the valve body, and the connecting end thereof is connected to the rubber inlet hole.

8. The volumetric valve device for controlling the precise quantitative output of glue according to claim 5, characterized in that: It also includes an anti-rotation nut for adjusting the downward movement stroke of the conical sealing portion to control the opening range of the glue outlet hole; A through groove C is opened on the top left side of the valve body and passes through the first chamber. A sealing ring G adapted to the outer wall of the valve stem A is clamped on the bottom of the through groove C; the anti-rotation nut is threadedly screwed on the upper inner part of the through groove C, and a movable groove is opened vertically along the inner edge thereof and passes through the upper and lower end surfaces thereof; the upper end of the valve stem A extends upward and passes through the through groove C and the movable groove with an interference fit and extends out of the upper part of the movable groove, and a limiting protrusion with an outer diameter larger than the inner diameter of the movable groove is fixed on the top thereof. When the anti-rotation nut is screwed to move up and down along the through slot C, the gap between the top surface and the bottom surface of the limiting projection is adjustable.

9. The volumetric valve device for controlling the precise quantitative output of glue according to claim 5, characterized in that: Also included is a dispensing needle for dispensing glue; The glue dispensing needle is arranged at the bottom of the valve body, and the upper end of the glue dispensing needle is plug-connected with the lower part of the glue outlet hole.

10. The volumetric valve device for controlling precise quantitative output of glue according to any one of claims 1 to 9, characterized in that: The driving member A comprises a sealing piston A sleeved on the outside of the valve stem A and a pressure relief spring A fixedly arranged at the bottom of the sealing piston A and wrapped around the outside of the valve stem A; the lower end of the pressure relief spring A abuts against the bottom surface of the first chamber, and the bottom surface of the first chamber is provided with a gas inlet and outlet connector A extending out of the valve body for connecting to an external gas supply device; The driving member B comprises a sealing piston B which is sleeved and fixed on the outside of the middle and upper part of the valve sleeve, and a pressure relief spring B which is fixed on the top of the sealing piston B and wrapped on the outside of the upper part of the valve sleeve; the upper end of the pressure relief spring B abuts against the top surface of the second chamber, and the top surface of the second chamber is provided with a gas inlet and outlet connector B which extends out of the valve body and is used for connecting an external gas supply device; The driving member C is a sealing piston C sleeved on the outside of the upper part of the valve stem B; the top surface of the fourth chamber is provided with a gas inlet and outlet connector C extending out of the valve body for connecting to an external gas supply device.

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