Single-gas-path spray head of spray valve and dispensing spray valve with single-gas-path spray head

Abstract

The utility model discloses a spray valve single air path nozzle and a dispensing spray valve with the same, the nozzle comprises an air guide seat, a sleeve, a glue outlet pipe and an adjustable air valve piece, the air guide seat is provided with an accommodating hole and an air valve chamber, and the air valve chamber is provided with an air inlet; the sleeve is coaxially arranged in the accommodating hole, and the lower end of the sleeve extends out of the accommodating hole; the glue outlet pipe is coaxially sleeved with the sleeve, an annular air channel is formed between the outer circumferential face of the glue outlet pipe and the inner circumferential face of the sleeve, the upper end of the annular air channel communicates with the valve chamber, and an air spraying opening is formed in the lower end of the annular air channel. The adjustable valve piece is arranged in the valve chamber and used for adjusting the opening degree of the valve chamber. The glue outlet pipe is provided with a glue outlet end, and a glue outlet hole is formed in the glue outlet end; the glue outlet hole and the air nozzle are coaxially arranged, and the air nozzle surrounds the outer side of the glue outlet hole. According to the single-gas-path spray head of the spray valve, the controllability of the state of the atomized colloid is improved, the atomized colloid can be accurately adjusted by the spray head according to different coating requirements, and the single-gas-path spray head of the spray valve is suitable for different application scenes.

Description

Technical Field

[0001] The utility model relates to dispensing equipment, in particular to a single-airway nozzle of a spray valve and a dispensing spray valve having the same. Background Art

[0002] A dispensing spray valve is an industrial device used for precisely controlling the spraying and coating of liquids or semi-fluids, playing an important role in industrial manufacturing. Its design aims to ensure an efficient, accurate, and repeatable coating process. Such a dispensing spray valve can precisely control the flow rate of viscous fluids and is widely used in high-demand fields such as semiconductors, electronics, automobiles, medical devices, and aerospace.

[0003] In the related art, a dispensing spray valve usually configures an annular air passage outside the glue outlet tube. By filling high-pressure gas into the annular air passage, when the high-pressure gas sprays out from the glue outlet end of the glue outlet tube, it mixes with the colloid at the glue outlet end to form an atomized colloid. For such a dispensing spray valve, in order to control the state of the atomized colloid, usually, parameters such as the air pressure and flow rate of the high-pressure gas output from the air source side are adjusted to achieve control. However, this adjustment and control method is single in form and difficult to meet higher precision requirements and a wider scope of application. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems in the related art to some extent. For this purpose, the purpose of the utility model is to provide a single-airway nozzle of a spray valve and a dispensing spray valve having the same.

[0005] To achieve the above object, on the one hand, according to an embodiment of the utility model, a single-airway nozzle of a spray valve includes:

[0006] An air guide seat, the air guide seat has a receiving hole and a valve chamber, and the valve chamber has an air inlet;

[0007] A sleeve, the sleeve is coaxially arranged in the receiving hole, and the lower end of the sleeve extends out of the receiving hole;

[0008] A glue outlet tube, the glue outlet tube is coaxially sleeved in the sleeve, and an annular air passage is formed between the outer peripheral surface of the glue outlet tube and the inner peripheral surface of the sleeve. The upper end of the annular air passage is communicated with the valve chamber, and the lower end of the annular air passage has an air jet port;

[0009] An adjustable valve member, the adjustable valve member is arranged in the valve chamber to adjust the opening degree of the valve chamber;

[0010] Wherein, the glue outlet tube has a glue outlet end, and the glue outlet end is provided with a glue outlet hole; the glue outlet hole and the air jet port are coaxially arranged, and the air jet port surrounds the glue outlet hole outside, and is used for spraying out an air flow so that the colloid sprayed out from the glue outlet hole is atomized into an atomized colloid.

[0011] In addition, the single-gas-path nozzle of the spray valve according to the above embodiments of the present invention may further have the following additional technical features:

[0012] According to an embodiment of the present invention, a valve hole is provided at the bottom of the valve chamber, a connecting air passage is provided in the air guide seat, one end of the connecting air passage communicates with the valve hole, and the other end of the connecting air passage communicates with the upper end of the annular air passage;

[0013] The adjustable valve member includes a valve stem and a driving knob. The valve stem is disposed in the valve chamber, and a tapered portion is provided at the lower end of the valve stem. The tapered portion is located in the valve hole and the diameter gradually decreases from top to bottom. The driving knob is pivotally disposed on the air guide seat and connected to the upper end of the valve stem to drive the valve stem to move up and down, so as to adjust the opening degree of the valve hole through the tapered portion.

[0014] According to an embodiment of the present invention, the upper end of the valve stem is threadedly connected to the driving knob, and a first sealing ring is sleeved on the valve stem to seal the gap between the valve stem and the air guide seat.

[0015] According to an embodiment of the present invention, a spring is sleeved on the valve stem. The upper end of the spring abuts against the top wall of the valve chamber, and the lower end of the spring abuts against the tapered portion.

[0016] According to an embodiment of the present invention, the glue outlet tube further has a connection end. The sleeve includes a tube portion and a connection portion located at the upper end of the tube portion. The annular air passage is defined between the inner peripheral surface of the tube portion and the outer peripheral surface of the glue outlet tube. The connection portion is used to connect to the dispensing valve head and press the connection end firmly on the dispensing valve head.

[0017] According to an embodiment of the present invention, the connection portion has a threaded hole communicating with the tube portion, and the threaded hole is adapted to be threadedly connected to the dispensing valve head.

[0018] According to an embodiment of the present invention, a buffer chamber is formed between the connection portion and the inner peripheral wall of the receiving hole. The other end of the connecting air passage communicates with the buffer chamber, and a ventilation hole is provided on the side wall of the upper end of the tube portion. The ventilation hole communicates the buffer chamber with the annular air passage.

[0019] According to an embodiment of the present invention, the upper end of the connection portion is sealed with the receiving hole through a second sealing ring, and the upper end of the tube portion is sealed with the receiving hole through a third sealing ring to define the buffer chamber.

[0020] According to an embodiment of the present utility model, the air guiding seat includes:

[0021] A socket seat, where the receiving hole is provided on the socket seat;

[0022] A channel seat, the channel seat is connected to one side of the socket seat, and the air inlet, the valve chamber and the connecting air passage are provided on the channel seat.

[0023] On the other hand, the dispensing spray valve according to the embodiment of the present utility model has the above-mentioned spray valve single-airway nozzle.

[0024] The spray valve single-airway nozzle and the dispensing spray valve having the same provided according to the embodiment of the present utility model introduce an adjustable valve member, realizing precise adjustment of the opening degree of the valve chamber, so that the atomization effect can be controlled more flexibly. Not only can parameters such as pressure and flow rate on the air source side be adjusted, but also the air flow in the annular air passage can be adjusted by adjusting the opening degree of the valve chamber. This design not only improves the controllability of the atomized colloid state, but also enables the nozzle to accurately adjust the atomized colloid according to different coating requirements, thereby adapting to different application scenarios and expanding its application range.

[0025] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0027] Figure 1 is a schematic structural diagram of the spray valve single-airway nozzle according to the embodiment of the present utility model;

[0028] Figure 2 is a front view of the spray valve single-airway nozzle according to the embodiment of the present utility model;

[0029] Figure 3 is Figure 2 a cross-sectional view taken along line A-A in

[0030] Figure 4 is a side view of the spray valve single-airway nozzle according to the embodiment of the present utility model;

[0031] Figure 5 is Figure 4 a cross-sectional view taken along line B-B in

[0032] Figure 6 is an exploded view of the single-airway nozzle of the spray valve according to an embodiment of the present utility model;

[0033] Figure 7 is another exploded view of the single-airway nozzle of the spray valve according to an embodiment of the present utility model;

[0034] Figure 8 is a schematic structural diagram of the dispensing spray valve according to an embodiment of the present utility model;

[0035] Figure 9 is a cross-sectional view of the dispensing spray valve according to an embodiment of the present utility model.

[0036] Reference numerals:

[0037] 10, air guide seat;

[0038] 101, socket seat;

[0039] 102, channel seat;

[0040] H101, air inlet;

[0041] H102, receiving hole;

[0042] H103, valve hole;

[0043] H104, connecting air passage;

[0044] P10, valve chamber;

[0045] 20, sleeve;

[0046] 201, tube part;

[0047] 202, connecting part;

[0048] H201, ventilation hole;

[0049] H202, air jet port;

[0050] P20, buffer chamber;

[0051] 30, adjustable valve member;

[0052] 301, valve stem;

[0053] 3011, conical part;

[0054] 302, drive knob;

[0055] 303, first sealing ring;

[0056] 304, spring;

[0057] 40, glue outlet tube;

[0058] 401. Connecting end

[0059] H40. Glue outlet hole

[0060] P40. Annular air duct

[0061] 50. Valve body

[0062] 60. Valve head

[0063] 601. Firing pin

[0064] The realization, functional features and advantages of the present utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific embodiments

[0065] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model and should not be construed as limiting the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0066] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

[0067] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0068] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "attachment", "fixation" and the like shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0069] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0070] The single-airway nozzle of the spray valve and the dispensing device having the same according to the embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

[0071] Refer to Figures 1 to 7 As shown, the single-airway nozzle of the spray valve according to the embodiments of the present utility model includes a gas guide seat 10, a sleeve 20, a glue outlet pipe 40 and an adjustable valve member 30.

[0072] Specifically, the gas guide seat 10 has a receiving hole H102 and a valve chamber P10, and the valve chamber P10 has an air inlet H101. The receiving hole H102 is used for installing the sleeve 20 and the glue outlet pipe 40 to ensure the stability of the entire nozzle. In a specific application, the gas guide seat 10 can be fixedly connected to the dispensing valve body 50 or the valve head 60. The air inlet H101 on the valve chamber P10 can be connected to an external gas source, and the valve chamber P10 is a chamber for introducing gas and controlling the introduced gas. By using the external gas source to provide high-pressure gas, the high-pressure gas provides a continuous and reliable air flow power source for the atomization process of the valve head 60.

[0073] The sleeve 20 is coaxially arranged in the receiving hole H102, and the lower end of the sleeve 20 extends out of the receiving hole H102. The glue outlet pipe 40 is coaxially sleeved in the sleeve 20, and an annular air passage P40 is formed between the outer peripheral surface of the glue outlet pipe 40 and the inner peripheral surface of the sleeve 20. The upper end of the annular air passage P40 communicates with the valve chamber P10, and the lower end of the annular air passage P40 has an air jet port H202. That is to say, the air inlet H101, the valve chamber P10, the annular air passage P40, and the air jet port H202 are sequentially communicated to form a high-pressure gas flow path for providing high-pressure gas and concentrating it to be ejected from the air jet port H202.

[0074] The adjustable valve member 30 is arranged in the valve chamber P10 for adjusting the opening degree of the valve chamber P10. By adjusting the opening of the valve chamber P10 through the adjustable valve member 30, the operator can directly and precisely control the amount of gas entering the annular air passage P40. The adjustable valve member 30 can adopt adjustment mechanisms such as a fine-tuning screw and a precision valve to achieve a micron-level adjustment accuracy.

[0075] The glue outlet pipe 40 has a glue outlet end, and a glue outlet hole H40 is provided at the glue outlet end. The glue in the glue outlet pipe 40 can be extruded from the glue outlet hole H40. The glue outlet hole H40 and the air jet port H202 are coaxially arranged, and the air jet port H202 surrounds the outside of the glue outlet hole H40 for ejecting an air flow so that the glue extruded from the glue outlet hole H40 is atomized into atomized glue. The gas in the valve chamber P10 can enter the air flow of the annular air passage P40, and this air flow is then ejected from the air jet port H202 at the lower end of the annular air passage P40. When the glue is extruded from the glue outlet hole H40 of the glue outlet pipe 40, it will encounter the air flow and be split into extremely small droplets under the shearing force of the air flow to form atomized glue.

[0076] It should be noted that the glue outlet hole H40 and the air jet port H202 are coaxially arranged, and the air jet port H202 surrounds the outside of the glue outlet hole H40. This design is based on the principle of fluid dynamics, ensuring that the glue released from the glue outlet hole H40 can immediately be fully mixed with the high-pressure air flow ejected from the air jet port H202, providing reliable shearing force and diffusion effect at the moment of glue release, thereby realizing an efficient atomization process. This design not only improves the atomization efficiency but also ensures the uniformity and consistency of the atomized particles.

[0077] In a specific application, the single-airway nozzle of the spray valve in this embodiment can be connected to the valve head 60 of the dispensing valve. For example, the air guide seat 10 is fixed to the valve body 50 of the dispensing valve, the sleeve 20 and the glue outlet pipe 40 are connected to the valve head 60 of the dispensing valve, and the plunger 601 on the valve head 60 penetrates into the glue outlet pipe 40. The specific working principle is as follows:

[0078] Utilize the movement of the firing pin 601 to extrude the colloid from the colloid outlet hole H40 of the colloid outlet pipe 40. Meanwhile, high-pressure gas is filled into the valve chamber P10 through the air inlet H101. The high-pressure gas enters the annular air passage P40 through the valve chamber P10 to form an air current. The air current sprays out from the air jet hole H202 to atomize the colloid flowing out from the colloid outlet hole H40 into fine droplets, forming an atomized colloid.

[0079] Before dispensing glue, the adjustable valve member 30 can be adjusted according to the dispensing requirements of the product to be dispensed, and then the opening degree of the valve chamber P10 can be adjusted to an appropriate opening degree. During the dispensing process, by adjusting the pressure and flow rate on the air source side, through the combination of the two, the state and deposition form of the atomized colloid can be precisely controlled, so as to achieve the expected dispensing effect.

[0080] According to the single-airway nozzle of the spray valve provided by the embodiment of the present utility model, the introduction of the adjustable valve member 30 realizes the precise adjustment of the opening degree of the valve chamber P10, so that the atomization effect can be controlled more flexibly. Not only can parameters such as the pressure and flow rate on the air source side be adjusted, but also the air current in the annular air passage P40 can be adjusted by adjusting the opening degree of the valve chamber P10. This design not only improves the controllability of the state of the atomized colloid, but also enables the nozzle to precisely adjust the atomized colloid according to different coating requirements, thereby adapting to different application scenarios and expanding its application range.

[0081] Refer to Figure 3 and Figure 5 As shown, in an embodiment of the present utility model, a valve hole H103 is provided at the bottom of the valve chamber P10. A connecting air passage H104 is provided in the air guide seat 10. One end of the connecting air passage H104 is communicated with the valve hole H103, and the other end of the connecting air passage H104 is communicated with the upper end of the annular air passage P40. That is, the gas in the valve chamber P10 can enter the connecting air passage H104 through the valve hole H103 and then enter the annular air passage P40 from the connecting air passage H104.

[0082] The adjustable valve member 30 includes a valve rod 301 and a driving knob 302. The valve rod 301 is arranged in the valve chamber P10, and a conical portion 3011 is provided at the lower end of the valve rod 301. The conical portion 3011 is located in the valve hole H103 and the diameter gradually decreases from top to bottom. The driving knob 302 is pivotally arranged on the air guide seat 10 and is connected to the upper end of the valve rod 301 to drive the valve rod 301 to move up and down, so as to adjust the opening degree of the valve hole H103 through the conical portion 3011.

[0083] In this embodiment, the adjustable valve member 30 mainly consists of a valve stem 301 and a driving knob 302. The valve stem 301 is inserted into the valve chamber P10 to ensure smooth and precise up-and-down movement. A tapered portion 3011 is designed at the lower end of the valve stem 301. This tapered portion 3011 is located in the valve hole H103. The tapered design allows for precise control of the opening degree of the valve hole H103 by changing the position of the valve stem 301, thus achieving precise flow control.

[0084] By rotating the driving knob 302, the operator can precisely control the up-and-down movement of the valve stem 301. This movement is directly converted into a change in the opening degree of the valve hole H103 through the tapered portion 3011. When the valve stem 301 moves downward, the degree to which the tapered portion 3011 enters the valve hole H103 increases, reducing the effective opening area of the valve hole H103 and thus decreasing the gas flow rate. Conversely, when the valve stem 301 moves upward, the tapered portion 3011 gradually withdraws from the valve hole H103, increasing the effective opening area of the valve hole H103 and thus increasing the gas flow rate. By finely adjusting the position of the valve stem 301, the operator can achieve fine adjustment of the air flow to meet different dispensing requirements. In addition, there is a predictable and approximately linear relationship between the rotation angle of the driving knob 302 and the change in gas flow rate. This characteristic enables the operator to manipulate more intuitively, improving the convenience and precision of the operation.

[0085] Refer to Figure 3 and Figure 5 As shown, in an embodiment of the present invention, the upper end of the valve stem 301 is threadedly connected to the driving knob 302. A first sealing ring 303 is sleeved on the valve stem 301. The first sealing ring 303 seals the gap between the valve stem 301 and the air guide seat 10.

[0086] When the driving knob 302 rotates, the driving knob 302 can drive the valve stem 301 to move up and down. The threaded connection method can improve the adjustment accuracy of the valve stem 301, and further improve the control accuracy of the opening degree of the valve hole H103. The first sealing ring 303 seals the gap between the valve stem 301 and the air guide seat 10 to prevent gas leakage and ensure the pressure stability of the valve chamber P10.

[0087] Refer to Figure 3 and Figures 5 to 6 As shown, in an embodiment of the present invention, a spring 304 is sleeved on the valve stem 301. The upper end of the spring 304 abuts against the top wall of the valve chamber P10, and the lower end of the spring 304 abuts against the tapered portion 3011.

[0088] The presence of the spring 304 provides a damping effect for the movement of the valve stem 301. When the operator adjusts the position of the valve stem 301 through the drive knob 302, the pressure change of the spring 304 can provide a tactile feedback, enabling the operator to more precisely perceive the change in the opening degree of the valve. This feedback mechanism helps to improve the accuracy and repeatability of the adjustment. In addition, the spring 304 also plays a stabilizing role, maintaining the stability of the valve stem 301 at the set position, thereby maintaining the accuracy of the air flow control.

[0089] Referring to Figure 3 and Figure 9 As shown, in some embodiments of the present invention, the glue outlet tube 40 further has a connection end 401, which is used to connect to the valve head 60 of the dispensing valve. The sleeve 20 includes a tube portion 201 and a connection portion 202 located at the upper end of the tube portion 201. An annular air passage P40 is defined between the inner peripheral surface of the tube portion 201 and the outer peripheral surface of the glue outlet tube 40. The connection portion 202 is used to connect to the valve head 60 of the dispensing valve and press the connection end 401 firmly on the valve head 60 of the dispensing valve. The connection between the connection portion 202 and the valve head 60 of the dispensing valve can be fixed by means such as screw locking, threaded connection, snap connection, etc.

[0090] In this embodiment, by connecting to the valve head 60 of the dispensing valve through the connection portion 202, the sleeve 20 is assembled to the valve head 60 of the dispensing valve in a specific application. At the same time, when the connection portion 202 is connected and fixed to the valve head 60 of the dispensing valve, the glue outlet tube 40 can be firmly fixed on the valve head 60 of the dispensing valve. Thus, the assembly between the glue outlet tube 40 and the valve head 60 of the dispensing valve is extremely convenient. Thus, the reliability and stability of the nozzle during operation are ensured, and the dispensing accuracy is improved. In addition, this design makes the installation, disassembly, and maintenance of the nozzle simpler and faster, and different models of nozzles can be replaced according to needs, increasing the market adaptability.

[0091] Referring to Figure 3 and Figure 9 As shown, in an embodiment of the present invention, the connection portion 202 has a threaded hole communicating with the tube portion 201, and the threaded hole is adapted to be threadedly connected to the valve head 60 of the dispensing valve.

[0092] Exemplarily, the connection end 401 of the glue outlet tube 40 has a radially protruding shoulder. The diameter of the threaded hole is larger than the inner diameter of the tube portion 201, so that a stepped surface is formed between the threaded hole and the tube portion 201. When the threaded hole is threadedly connected to the external thread on the valve head 60 of the dispensing valve, by screwing the sleeve 20, the stepped surface presses on the shoulder, and then the shoulder presses and fits on the bottom surface of the valve head 60 of the dispensing valve.

[0093] In this embodiment, the connecting portion 202 of the sleeve 20 is connected to the dispensing valve head 60 by a threaded connection method. This not only makes the connection and disassembly simple, but also uses the screwing method to compress the glue outlet tube 40, ensuring a reliable connection between the glue outlet tube 40 and the dispensing valve head 60, forming a better sealed connection state, and ensuring no glue leakage and other problems.

[0094] Referring to Figure 3 As shown, in an embodiment of the present invention, a buffer chamber P20 is formed between the connecting portion 202 and the inner peripheral wall of the receiving hole H102. The other end of the connecting air passage H104 communicates with the buffer chamber P20. An air vent H201 is provided on the side wall of the upper end of the pipe portion 201, and the air vent H201 communicates the buffer chamber P20 with the annular air passage P40.

[0095] In this embodiment, a buffer chamber P20 is formed between the connecting portion 202 and the inner peripheral wall of the receiving hole H102. The existence of the buffer chamber P20 not only provides a transition space, but also plays an important role in gas flow and pressure regulation to ensure that it can effectively balance and stabilize the air flow and reduce the possible pressure fluctuations during the dispensing process. Specifically, the high-pressure gas from the air source enters the buffer chamber P20 from the valve chamber P10 for preliminary pressure equalization, absorbing and alleviating the possible pressure fluctuations. An air vent H201 is provided on the side wall of the upper end of the pipe portion 201. For example, there are multiple air vents H201, and the multiple air vents H201 are circumferentially spaced. The function of these air vents H201 is to communicate the buffer chamber P20 with the annular air passage P40. The setting of the air vents H201 enables the gas to have a pre-distribution process before entering the annular air passage P40, which helps to ensure the uniformity of the gas distribution in the annular air passage P40.

[0096] Referring to Figure 3 As shown, in an embodiment of the present invention, the upper end of the connecting portion 202 is sealed with the receiving hole H102 through a second sealing ring, and the upper end of the pipe portion 201 is sealed with the receiving hole H102 through a third sealing ring to define the buffer chamber.

[0097] Through the setting of the second sealing ring and the third sealing ring, the space between the connecting portion 202 and the receiving hole H102 is completely enclosed, forming an independent and sealed air chamber, that is, the buffer chamber P20, effectively preventing the gas leakage in the buffer chamber P20 and ensuring the stability of the air pressure. In addition, the sealed independent air chamber makes the air pressure control more precise, which is beneficial to controlling the atomization state.

[0098] Exemplarily, a first sealing groove is provided on the outer peripheral surface of the upper end of the connecting portion 202. The second sealing ring is sleeved in the first sealing groove and elastically abuts and seals against the inner peripheral wall of the receiving hole H102. A second sealing groove is provided on the outer peripheral surface of the upper end of the pipe portion 201. The third sealing ring is sleeved in the second sealing groove and elastically abuts and seals against the inner peripheral wall of the receiving hole H102. In this way, a good sealing effect can be formed, and the second sealing ring and the third sealing ring are positioned and fixed, with reliable and stable sealing and more convenient assembly.

[0099] Referring Figures 1 to 7 As shown, in an embodiment of the present invention, the air guide seat 10 includes a socket seat 101 and a channel seat 102. The receiving hole H102 is provided on the socket seat 101; the channel seat 102 is connected to one side of the socket seat 101, and the air inlet H101, the valve chamber P10 and the connecting air passage H104 are provided on the channel seat 102.

[0100] In this embodiment, the air guide seat 10 is composed of a socket seat 101 and a channel seat 102. The receiving hole H102 is provided on the socket seat 101, and the air inlet H101, the valve chamber P10 and the connecting air passage H104 are arranged on the channel seat 102, realizing a more flexible air path layout and more convenient interface management.

[0101] Referring Figure 8 and Figure 9 As shown, the dispensing spray valve according to the embodiment of the present invention has the above-mentioned spray valve single air path nozzle.

[0102] It can be understood that the dispensing spray valve further includes a valve body 50 and a valve head 60. A striker driving mechanism is provided in the valve body 50 to drive the striker 601 to move up and down to extrude the colloid in the glue outlet pipe. The connecting portion of the sleeve 20 is threadedly connected to the valve head 60, and the glue outlet pipe 40 is pressed against the bottom of the valve head 60 to achieve a sealed connection.

[0103] The dispensing spray valve provided by the embodiment of the present invention has the above-mentioned spray valve single air path nozzle. The nozzle introduces an adjustable valve member 30, realizing precise adjustment of the opening degree of the valve chamber P10, so that the atomization effect can be controlled more flexibly. Not only can parameters such as pressure and flow rate on the air source side be adjusted, but also the air flow in the annular air passage P40 can be adjusted by adjusting the opening degree of the valve chamber P10. This design not only improves the controllability of the atomized colloid state, but also enables the nozzle to precisely adjust the atomized colloid according to different coating requirements, thereby adapting to different application scenarios and expanding its application range.

[0104] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. 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 can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0105] The above are only the preferred embodiments of the present utility model, and do not thus limit the patent scope of the present utility model. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A single-airway spray head for a spray valve, characterized in that, Comprising: An air guiding seat, the air guiding seat having a receiving hole and a valve chamber, the valve chamber having an air inlet; A sleeve, the sleeve being coaxially arranged in the receiving hole, and the lower end of the sleeve protruding from the receiving hole; A glue outlet pipe, the glue outlet pipe being coaxially sleeved in the sleeve, and an annular air passage being formed between the outer peripheral surface of the glue outlet pipe and the inner peripheral surface of the sleeve, the upper end of the annular air passage communicating with the valve chamber, and the lower end of the annular air passage having an air jet port; An adjustable valve member, the adjustable valve member being arranged in the valve chamber for adjusting the opening degree of the valve chamber; Wherein, the glue outlet pipe has a glue outlet end, and the glue outlet end is provided with a glue outlet hole; the glue outlet hole and the air jet port are coaxially arranged, and the air jet port surrounds the glue outlet hole outside, for jetting out an air flow so that the glue ejected from the glue outlet hole is atomized into atomized glue.

2. The single gas path nozzle of the spray valve according to claim 1, characterized in that, A valve hole is provided at the bottom of the valve chamber, a connecting air passage is provided in the air guiding seat, one end of the connecting air passage communicates with the valve hole, and the other end of the connecting air passage communicates with the upper end of the annular air passage; The adjustable valve member includes a valve rod and a driving knob, the valve rod is inserted in the valve chamber, and the lower end of the valve rod has a tapered portion, the tapered portion is located in the valve hole and the diameter gradually decreases from top to bottom, the driving knob is pivotally arranged on the air guiding seat and connected to the upper end of the valve rod for driving the valve rod to move up and down, so as to adjust the opening degree of the valve hole through the tapered portion.

3. The single-gas-path nozzle of the spray valve according to claim 2, characterized in that, The upper end of the valve rod is threadedly connected to the driving knob, a first sealing ring is sleeved on the valve rod, and the first sealing ring seals the gap between the valve rod and the air guiding seat.

4. The single gas path nozzle of the spray valve according to claim 2, characterized in that A spring is sleeved on the valve rod, the upper end of the spring abuts against the top wall of the valve chamber, and the lower end of the spring abuts against the tapered portion.

5. The single-airway spray head of the spray valve according to claim 2, wherein The glue outlet pipe further has a connecting end, the sleeve includes a pipe portion and a connecting portion located at the upper end of the pipe portion, the annular air passage is defined between the inner peripheral surface of the pipe portion and the outer peripheral surface of the glue outlet pipe, and the connecting portion is used for connecting with the valve head of the dispensing valve and pressing and fixing the connecting end on the valve head of the dispensing valve.

6. The single-gas-path spray head of the spray valve according to claim 5, characterized in that, The connecting portion has a threaded hole communicating with the pipe portion, and the threaded hole is adapted to be threadedly connected to the valve head of the dispensing valve.

7. The single-gas-path nozzle of the spray valve according to claim 5, characterized in that, A buffer chamber is formed between the connecting portion and the inner peripheral wall of the receiving hole, the other end of the connecting air passage communicates with the buffer chamber, and a ventilation hole is provided on the side wall of the upper end of the pipe portion, and the ventilation hole communicates the buffer chamber with the annular air passage.

8. The single gas path spray head of the spray valve according to claim 7, characterized in that, The upper end of the connecting portion is sealed with the receiving hole through a second sealing ring, and the upper end of the pipe portion is sealed with the receiving hole through a third sealing ring to define the buffer chamber.

9. The single gas path nozzle of the spray valve according to claim 2, characterized in that The air guiding seat includes: A socket seat, the receiving hole is provided on the socket seat; A channel seat, the channel seat is connected to one side of the socket seat, and the air inlet, the valve chamber and the connecting air passage are provided on the channel seat.

10. A dispensing spray valve, characterized in that, Having the single air path nozzle of the spray valve according to any one of claims 1 to 9.

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