Floating type adjustable pneumatic dispensing valve

Abstract

The floating type adjustable pneumatic dispensing valve comprises a valve body, an air pressure valve, a fluid piece, a needle head assembly, a valve rod and an adjusting piece, an air pressure cavity is formed in the valve body, a piston is arranged in the air pressure cavity, an air channel is formed in the top end of the side wall of the air pressure cavity, an installation groove is formed in the middle of the bottom face of the air pressure cavity, and a first spring piece is arranged in the installation groove. The fluid piece is arranged on the bottom face of the valve body, a second through groove is formed in the fluid piece, the second through groove penetrates through the upper end and the lower end of the fluid piece, a glue inlet through groove is formed in the side face of the fluid piece, and the glue inlet channel is communicated with the second through groove; the needle head assembly comprises a floating seat and a dispensing needle head, the floating seat is connected to the bottom end of the fluid piece, a third through groove is formed in the floating seat and penetrates through the bottom face of the floating seat, the dispensing needle head is connected to the lower portion of the floating seat, the valve rod penetrates through the middle of the piston, and the lower end of the valve rod sequentially penetrates through the mounting groove, the first through groove, the second through groove and the third through groove; the adjusting part is arranged at the upper end of the valve body and used for adjusting the stroke of the valve rod so as to control the glue outlet amount of the third through groove, floating glue dispensing can be achieved, the glue outlet amount can be adjusted through the adjusting part, the practicability is high, the using effect is good, and the glue dispensing efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of dispensing valves, and more specifically, to a floating adjustable pneumatic dispensing valve. Background Art

[0002] In the prior art, when the dispensing needle head dispenses glue on a product, since the height of the needle head is fixed, when dispensing glue on a workpiece with an uneven dispensing surface, it is often necessary to frequently adjust the height of the dispensing needle head in order to dispense glue on dispensing points at different horizontal heights, resulting in slow dispensing efficiency. On the other hand, since the glue output of the dispensing needle head is fixed, when it is necessary to change the glue output, it is necessary to replace dispensing needle heads of different specifications, making the operation rather cumbersome and greatly reducing the dispensing efficiency.

[0003] Therefore, it is necessary to make further improvements in the prior art. Summary of the Utility Model

[0004] The utility model aims to at least solve 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 floating adjustable pneumatic dispensing valve.

[0005] To achieve the above purpose, according to an embodiment of the utility model, the floating adjustable pneumatic dispensing valve includes a valve body, a pneumatic valve, a fluid member, a needle assembly, a valve rod, and an adjusting member.

[0006] A pneumatic chamber is provided inside the valve body. A piston is provided in the pneumatic chamber. The piston can move along the height direction of the pneumatic chamber and seals the part of the pneumatic chamber above the piston. A gas passage is provided at the top end of the side wall of the pneumatic chamber. A mounting groove is formed in the middle of the bottom surface of the pneumatic chamber. A first spring member is provided in the mounting groove. The upper end of the first spring member abuts against the bottom surface of the piston. A first through groove is formed in the bottom surface of the mounting groove and penetrates to the bottom surface of the valve body.

[0007] The pneumatic valve is connected to the gas passage to inject gas into the pneumatic chamber or discharge the gas in the pneumatic chamber.

[0008] The fluid member is provided at the bottom surface of the valve body. A second through groove is provided in the fluid member and penetrates through the upper and lower ends of the fluid member. A glue inlet through groove is provided on the side surface of the fluid member. The glue inlet passage is communicated with the second through groove.

[0009] The needle assembly includes a floating seat and a dispensing needle head. The floating seat is connected to the bottom end of the fluid member. A third through groove is provided in the floating seat and penetrates to the bottom surface of the floating seat. The dispensing needle head is connected below the floating group. Among them, the dispensing needle head can float up and down with the floating seat.

[0010] The valve stem passes through the middle of the piston, and its lower end sequentially passes through the mounting groove, the first through groove, the second through groove and the third through groove. When the valve stem moves upward, the lower end of the valve stem seals the lower end of the third through groove.

[0011] The adjusting member is arranged at the upper end of the valve body to adjust the stroke of the valve stem so as to control the glue output of the third through groove.

[0012] In addition, the floating adjustable pneumatic dispensing valve according to the above embodiment of the present invention may further have the following additional technical features:

[0013] According to an embodiment of the present invention, the adjusting member includes a mounting seat and a nut member.

[0014] The mounting seat is mounted on the upper end of the valve body, and an annular connecting portion is formed at the upper end of the mounting seat.

[0015] The lower end of the nut member is connected to the inside of the annular connecting portion and forms a threaded connection with the annular connecting portion. A fourth through groove is provided in the middle of the nut member, and the fourth through groove penetrates through the upper and lower end faces of the nut member.

[0016] Wherein, the upper end of the valve stem passes through the fourth through groove and extends to the upper end of the nut member. A limiting block is provided at the upper end of the valve stem, and a stroke gap is defined between the limiting block and the nut member to limit the downward stroke of the valve stem.

[0017] According to an embodiment of the present invention, a scale ring is sleeved on the upper end of the outer surface of the nut member, and the scale ring is fixedly connected to the nut member to mark the moving distance of the nut member.

[0018] According to an embodiment of the present invention, a receiving groove is provided in the side wall of the annular connecting portion, an inner through port is opened on the inner wall of the annular connecting portion, the inner through port is communicated with the receiving groove, and an outer through port is opened on the outer wall of the annular connecting portion, and the outer through port is communicated with the receiving groove.

[0019] A pin is provided in the receiving groove. One side of the pin passes through the inner through port and extends to the inside of the annular connecting portion, and the other side of the pin passes through the outer through port and extends to the outside of the annular connecting portion. The pin can move in the direction from the outer through port to the inner through port.

[0020] A second spring member is sleeved on the outer surface of the annular connecting portion, and the second spring member presses the side surface of the pin to press it tightly towards the inside of the annular connecting portion.

[0021] The outer surface of the nut member is provided with a plurality of card slots, and the plurality of card slots all extend along the height direction of the nut member and are sequentially distributed along the circumferential direction of the nut member. One side of the pin extends into one of the card slots.

[0022] According to an embodiment of the present invention, a diversion block is provided on one side of the fluid member. A diversion groove is provided in the diversion block. One end of the diversion groove communicates with the second through groove. One end of the diversion block is connected to a glue bucket, and the outlet of the glue bucket communicates with the other end of the diversion groove.

[0023] According to an embodiment of the present invention, the floating seat includes a first adapter, a first cap and a second adapter.

[0024] The first adapter is connected to the bottom of the fluid member. The third through groove is provided in the adapter. A sealing block is provided at the bottom end of the valve stem. The sealing block is located below the first adapter, and the diameter of the sealing block is larger than the diameter of the third through groove.

[0025] The first cap is sleeved on the lower end of the fluid member, and a first step surface is formed on the inner wall of the first cap.

[0026] The second adapter is sleeved on the outside of the first adapter. A sliding portion is provided at the top end of the outer surface of the second adapter. The sliding portion is vertically slidably arranged inside the first cap and is located above the first step surface.

[0027] According to an embodiment of the present invention, a second step surface is formed on the inner wall of the second adapter. A pressing portion extending downward is provided on the outer side surface of the first adapter. A third spring member is sleeved on the outside of the first adapter. The third spring member is located between the pressing portion and the second step surface.

[0028] According to an embodiment of the present invention, a second cap is further included. The lower end of the second cap is sleeved on the outside of the dispensing needle tip, and the upper end is threadedly connected to the outer surface of the second adapter.

[0029] According to an embodiment of the present invention, a third step surface is provided at the bottom end of the inner wall of the second cap. A convex portion is provided on the outside of the dispensing needle tip, and the convex portion abuts against the third step surface.

[0030] According to an embodiment of the present invention, a solenoid valve is connected to the pneumatic valve to automatically control the opening and closing of the gas passage.

[0031] According to the floating adjustable pneumatic dispensing valve provided by the embodiments of the present utility model, during use, gas can be injected into the air pressure chamber through the air pressure valve, and then the pressure generated by the gas can be used to push the piston downward, which drives the valve stem downward to open the third through groove, enabling the glue to flow out smoothly. When the air pressure valve extracts the gas in the air pressure chamber, the elastic force of the first spring member pushes the piston upward, driving the valve stem upward to seal the third through groove and prevent the glue from flowing out. Through the connection between the floating seat and the dispensing needle tip, during dispensing, for uneven dispensing surfaces, corresponding up and down floating dispensing can be performed, eliminating the need to frequently adjust the horizontal height of the entire needle assembly. The adjusting member can adjust the stroke of the valve stem to precisely control the glue output of the third through groove. The structure of the present utility model is simple, the dispensing needle tip can perform up and down floating, and the glue output can be stably controlled. It has strong practicability, good use effect, and effectively improves the dispensing efficiency.

[0032] 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

[0033] 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 following drawings 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.

[0034] Figure 1 is the isometric view of the overall structure in the embodiments of the present utility model;

[0035] Figure 2 is the sectional view of the overall structure in the embodiments of the present utility model;

[0036] Figure 3 is the exploded view of the overall structure in the embodiments of the present utility model;

[0037] Figure 4 is the exploded view of the adjusting member in the embodiments of the present utility model;

[0038] Figure 5 is another exploded view of the adjusting member in the embodiments of the present utility model;

[0039] Figure 6 is the exploded view of the needle assembly in the embodiments of the present utility model;

[0040] Figure 7 is the sectional view of the valve body in the embodiments of the present utility model;

[0041] Figure 8 It is a schematic diagram of the overall structure of the second adapter in the embodiment of the present utility model;

[0042] Figure 9 It is a schematic diagram of the overall structure of the first cap in the embodiment of the present utility model.

[0043] Reference numerals in the drawings:

[0044] Valve body 10;

[0045] Air pressure chamber 101;

[0046] Piston 102;

[0047] Gas passage 103;

[0048] Mounting groove 104;

[0049] First spring member 105;

[0050] First through groove 106;

[0051] Air pressure valve 20;

[0052] Solenoid valve 201;

[0053] Fluid member 30;

[0054] Second through groove 301;

[0055] Glue inlet through groove 302;

[0056] Deflector block 303;

[0057] Deflection groove 3031;

[0058] Glue barrel 304;

[0059] Needle assembly 40;

[0060] Floating seat 401;

[0061] First adapter 4011;

[0062] Pressing portion 40111;

[0063] Third spring member 40112;

[0064] First cap 4012;

[0065] First step surface 40121;

[0066] Second adapter 4013;

[0067] Sliding portion 40131;

[0068] Second step surface 40132;

[0069] The second cap 4014;

[0070] The third step surface 40141;

[0071] The dispensing needle 402;

[0072] The convex part 4021;

[0073] The third through groove 403;

[0074] The valve stem 50;

[0075] The limit block 501;

[0076] The sealing block 502;

[0077] The adjusting part 60;

[0078] The mounting seat 601;

[0079] The annular connecting part 602;

[0080] The accommodating groove 6021;

[0081] The inner through port 6022;

[0082] The outer through port 6023;

[0083] The pin 6024;

[0084] The second spring part 6025;

[0085] The nut part 603;

[0086] The fourth through groove 6031;

[0087] The scale ring 6032;

[0088] The card slot 6033.

[0089] The realization, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0090] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions from beginning to end. 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 a limitation of 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 creative efforts belong to the scope of protection of the present utility model.

[0091] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by 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. is based on the orientation or positional relationship shown in the drawings. It is 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. Therefore, it should not be construed as a limitation to the present utility model.

[0092] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying 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, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0093] In the present utility model, unless otherwise clearly specified and defined, the terms such as "installation", "connection", "connection", "fixation", etc. should be understood 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 directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. 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.

[0094] In the present utility model, unless otherwise clearly specified and defined, 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 other features between them. Moreover, the first feature being "above", "over" and "on" 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 "under" 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.

[0095] The floating adjustable pneumatic dispensing valve according to the embodiment of the present utility model will be described in detail below with reference to the drawings.

[0096] Refer to Figures 1 to 9 As shown, the floating adjustable pneumatic dispensing valve according to the embodiment of the present utility model includes a valve body 10, a pneumatic valve 20, a fluid member 30, a needle assembly 40, a valve stem 50, and an adjusting member 60.

[0097] Inside the valve body 10, there is a pneumatic chamber 101. Inside the pneumatic chamber 101, there is a piston 102. The piston 102 can move along the height direction of the pneumatic chamber 101 and seal the part of the pneumatic chamber 101 above the piston 102. At the top end of the side wall of the pneumatic chamber 101, there is a gas passage 103. In the middle of the bottom surface of the pneumatic chamber 101, there is an installation groove 104. Inside the installation groove 104, there is a first spring member 105. The upper end of the first spring member 105 abuts against the bottom surface of the piston 102. At the bottom surface of the installation groove 104, there is a first through groove 106, and the first through groove 106 penetrates to the bottom surface of the valve body 10.

[0098] The pneumatic valve 20 is connected to the gas passage 103 to inject gas into the pneumatic chamber 101 or discharge the gas in the pneumatic chamber 101.

[0099] The fluid member 30 is arranged at the bottom surface of the valve body 10. Inside the fluid member 30, there is a second through groove 301, and the second through groove 301 penetrates through the upper and lower ends of the fluid member 30. On the side surface of the fluid member 30, there is a glue inlet through groove 302, and the glue inlet passage is communicated with the second through groove 301. So that glue can enter the second through groove 301 through the glue inlet passage.

[0100] The needle assembly 40 includes a floating seat 401 and a dispensing needle 402. The floating seat 401 is connected to the bottom end of the fluid member 30. Inside the floating seat 401, there is a third through groove 403, and the third through groove 403 penetrates to the bottom surface of the floating seat 401. The dispensing needle 402 is connected below the floating group. Among them, the dispensing needle 402 can float up and down with the floating seat 401.

[0101] The valve rod 50 passes through the middle of the piston 102, and the lower end sequentially passes through the installation groove 104, the first through groove 106, the second through groove 301 and the third through groove 403. When the valve rod 50 moves upward, the lower end of the valve rod 50 seals the lower end of the third through groove 403. It can be understood that the above first through groove 106, second through groove 301 and third through groove 403 are all on the same axis.

[0102] The adjusting member 60 is arranged at the upper end of the valve body 10 to adjust the stroke of the valve rod 50 to control the glue discharge amount of the third through groove 403.

[0103] Based on the above, during use, gas can be injected into the air pressure chamber 101 through the air pressure valve 20, and then the pressure generated by the gas can be used to push the piston 102 downward, that is, drive the valve rod 50 downward to open the third through groove 403, so that the glue can flow out smoothly. When the air pressure valve 20 extracts the gas in the air pressure chamber 101, the elastic force of the first spring member 105 will push the piston 102 upward, that is, drive the valve rod 50 upward, thereby sealing the third through groove 403 to prevent the glue from flowing out. Through the connection between the floating seat 401 and the dispensing needle 402, during dispensing, for uneven dispensing surfaces, corresponding up and down floating dispensing can be performed, so that it is not necessary to frequently adjust the horizontal height of the entire needle assembly 40. And the adjusting member 60 can adjust the stroke of the valve rod 50 to accurately control the glue output of the third through groove 403. The structure of the present utility model is simple, the dispensing needle 402 can perform up and down floating, and the glue output can be stably controlled. It has strong practicability, good use effect, and effectively improves the dispensing efficiency.

[0104] Preferably, in an embodiment of the present utility model, the adjusting member 60 includes a mounting seat 601 and a nut member 603.

[0105] The mounting seat 601 is installed at the upper end of the valve body 10, and an annular connecting portion 602 is formed at the upper end of the mounting seat 601.

[0106] The lower end of the nut member 603 is connected to the annular connecting portion 602 and forms a threaded connection with the annular connecting portion 602. A fourth through groove 6031 is provided in the middle of the nut member 603, and the fourth through groove 6031 penetrates through the upper and lower end faces of the nut member 603.

[0107] Wherein, the upper end of the valve rod 50 passes through the fourth through groove 6031 and extends to the upper end of the nut member 603. A limiting block 501 is provided at the upper end of the valve rod 50, and a stroke gap is defined between the limiting block 501 and the nut member 603 to limit the downward stroke of the valve rod 50.

[0108] It should be noted that there is a gap between the valve rod 50 and the nut member 603, that is, the valve rod 50 remains stationary when the nut member 603 rotates. Thus, when the nut member 603 is rotated, it can be lifted or lowered, thereby changing the stroke gap between the limiting block 501 and the nut member 603, and further changing the maximum downward stroke of the valve rod 50, thereby changing the glue output of the third through groove 403. Its adjustment method is simple and reliable. The limiting block 501 is used to limit the valve rod 50 to prevent the end of the valve rod 50 from entering the nut member 603.

[0109] Preferably, in an embodiment of the present invention, a scale ring 6032 is sleeved on the upper end of the outer surface of the nut member 603, and the scale ring 6032 is fixedly connected to the nut member 603 for marking the moving distance of the nut member 603.

[0110] In this way, by sleeving the scale ring 6032 on the upper end of the outer surface of the nut member 603 and fixedly connecting the scale ring 6032 to the nut member 603, when the nut member 603 is rotated, the scale ring 6032 can also be rotated accordingly. The operator can accurately control the rotation stroke of the nut member 603 through the scale indication on the scale ring 6032, further enhancing the accuracy of the glue output control.

[0111] Preferably, in an embodiment of the present invention, a receiving groove 6021 is provided in the side wall of the annular connecting portion 602, an inner through port 6022 is opened on the inner wall of the annular connecting portion 602, the inner through port 6022 is communicated with the receiving groove 6021, an outer through port 6023 is opened on the outer wall of the annular connecting portion 602, and the outer through port 6023 is communicated with the receiving groove 6021.

[0112] A pin 6024 is provided in the receiving groove 6021. One side of the pin 6024 extends through the inner through port 6022 to the inside of the annular connecting portion 602, and the other side of the pin 6024 extends through the outer through port 6023 to the outside of the annular connecting portion 602. The pin 6024 can move in the direction from the outer through port 6023 to the inner through port 6022.

[0113] A second spring member 6025 is sleeved on the outer surface of the annular connecting portion 602. The second spring member 6025 presses the side surface of the pin 6024 to press it tightly towards the inside of the annular connecting portion 602.

[0114] A plurality of card slots 6033 are provided on the outer surface of the nut member 603. The plurality of card slots 6033 all extend along the height direction of the nut member 603 and are sequentially distributed along the circumferential direction of the nut member 603. One side surface of the pin 6024 extends into one of the card slots 6033.

[0115] Based on the above, it can be understood that the opposite side surfaces of the pin 6024 respectively extend to the outer through - port 6023 and the inner through - port 6022, and one side surface of the pin 6024 (this side surface is an arc surface) extends into the card slot 6033, while the other side surface contacts the inner side of the second spring member 6025. And the second spring member 6025 will undergo a certain degree of deformation after being pressured by the pin 6024. Then, when the nut member 603 is rotated, both sides of the card slot 6033 on the nut member 603 will squeeze the pin 6024, causing it to move towards the side of the outer through - port 6023 until the next - side card slot 6033 is opposite to the pin 6024, and the side surface of the pin 6024 will pop back into the corresponding card slot 6033, thereby limiting the nut member 603, that is, generating a corresponding resistance to prevent the nut member 603 from rotating randomly.

[0116] Preferably, in an embodiment of the present invention, a diversion block 303 is provided on one side of the fluid member 30. A diversion groove 3031 is provided in the diversion block 303. One end of the diversion groove 3031 is communicated with the second through - groove 301. One end of the diversion block 303 is connected to a glue bucket 304, and the outlet of the glue bucket 304 is communicated with the other end of the diversion groove 3031.

[0117] In this way, by providing the diversion block 303 and arranging the glue bucket 304 on one side of the diversion block 303, the glue in the glue bucket 304 can enter the second through - groove 301 through the diversion groove 3031, and pass through the second through - groove 301 and the third through - groove 403 into the needle assembly 40.

[0118] Preferably, in an embodiment of the present invention, the floating seat 401 includes a first adapter 4011, a first cap 4012, and a second adapter 4013.

[0119] The first adapter 4011 is connected to the bottom of the fluid member 30. The third through - groove 403 is provided in the adapter. A sealing block 502 is provided at the bottom end of the valve stem 50. The sealing block 502 is located below the first adapter 4011, and the diameter of the sealing block 502 is larger than the diameter of the third through - groove 403.

[0120] The first cap 4012 is sleeved on the lower end of the fluid member 30, and a first step surface 40121 is formed on the inner wall of the first cap 4012.

[0121] The second adapter 4013 is sleeved outside the first adapter 4011. The top end of the outer surface of the second adapter 4013 is provided with a sliding part 40131. The sliding part 40131 is vertically slidably arranged inside the first cap 4012 and is located above the first step surface 40121.

[0122] In this way, when the valve stem 50 moves upward, the sealing block 502 will seal against the bottom end of the first adapter 4011 to seal the third through groove 403. The first clamping groove 6033 can connect the first adapter 4011 below the fluid part 30. The second adapter 4013 is sleeved outside the first adapter 4011. The top end of the outer surface of the second adapter 4013 is provided with a sliding part 40131. The sliding part 40131 is vertically slidably arranged inside the first cap 4012 and is located above the first step surface 40121. Then, the second adapter 4013 can move along the height direction of the first adapter part through the sliding part 40131, so as to realize the floating of the dispensing needle 402. The function of the first step surface 40121 is to limit the sliding part 40131.

[0123] Preferably, in an embodiment of the present invention, a second step surface 40132 is formed on the inner wall of the second adapter 4013. A pressing part 40111 extending downward is provided on the outer side surface of the first adapter 4011. A third spring member 40112 is sleeved outside the first adapter 4011. The third spring member 40112 is located between the pressing part 40111 and the second step surface 40132.

[0124] In this way, by forming the second step surface 40132 on the inner wall of the second adapter 4013, it can be used to support the third spring member 40112. When the dispensing needle 402 is under pressure, the second adapter 4013 will rise, and the third spring member 40112 will contract (i.e., applicable to the dispensing area with a high horizontal position). When the pressure on the dispensing needle 402 disappears, the elastic force of the third spring member 40112 will drive the second adapter 4013 to move downward (applicable to the dispensing area with a lower horizontal position).

[0125] Preferably, in an embodiment of the present invention, it further includes a second cap 4014. The lower end of the second cap 4014 is sleeved outside the dispensing needle 402, and the upper end is threadedly connected to the outer surface of the second adapter 4013.

[0126] It should be understood that the second capping 4014 and the dispensing needle 402 are relatively rotatable. In this way, the dispensing needle 402 can be detachably connected to the second adapter 4013 through the second capping 4014, facilitating the disassembly and installation of the needle.

[0127] Preferably, in an embodiment of the present invention, a third stepped surface 40141 is provided at the bottom end of the inner wall of the second capping 4014, and a protrusion 4021 is provided on the outer side of the dispensing needle 402, and the protrusion 4021 abuts against the third stepped surface 40141.

[0128] In this way, since the protrusion 4021 abuts against the third stepped surface 40141, the second capping 4014 can be prevented from slipping off the dispensing needle 402. Then, by connecting the upper end of the second capping 4014 to the second adapter 4013, the dispensing needle 402 can be stably locked at the lower end of the second adapter 4013 to guide the glue flowing out of the third through groove 403.

[0129] Preferably, in an embodiment of the present invention, a solenoid valve 201 is connected to the pneumatic valve 20 to automatically control the opening and closing of the gas passage 103.

[0130] In this way, by providing the solenoid valve 201 on the pneumatic valve 20, automatic control of the opening and closing of the gas passage 103 can be achieved, making it more intelligent and automated.

[0131] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "example", "specific example", or "some examples" means 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 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 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.

[0132] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A floating adjustable pneumatic dispensing valve, characterized in that, Comprising: A valve body, inside which there is a pneumatic chamber. Inside the pneumatic chamber, there is a piston. The piston can move along the height direction of the pneumatic chamber and seals the part of the pneumatic chamber above the piston. At the top end of the side wall of the pneumatic chamber, there is a gas passage. In the middle of the bottom surface of the pneumatic chamber, there is a mounting groove. Inside the mounting groove, there is a first spring member. The upper end of the first spring member abuts against the bottom surface of the piston. At the bottom surface of the mounting groove, there is a first through groove, which penetrates through to the bottom surface of the valve body; A pneumatic valve, which is connected to the gas passage of the pneumatic valve to inject gas into the pneumatic chamber or discharge the gas in the pneumatic chamber; A fluid member, which is arranged at the bottom surface of the valve body. Inside the fluid member, there is a second through groove, which penetrates through the upper and lower ends of the fluid member. On the side surface of the fluid member, there is a glue inlet through groove, which is communicated with the second through groove; A needle assembly, which includes a floating seat and a dispensing needle. The floating seat is connected to the bottom end of the fluid member. Inside the floating seat, there is a third through groove, which penetrates through to the bottom surface of the floating seat. The dispensing needle is connected below the floating seat. Among them, the dispensing needle can float up and down with the floating seat; A valve rod, which passes through the middle of the piston and sequentially passes through the mounting groove, the first through groove, the second through groove and the third through groove at the lower end. When the valve rod moves upward, the lower end of the valve rod seals the lower end of the third through groove; An adjusting member, which is arranged at the upper end of the valve body to adjust the stroke of the valve rod to control the glue discharge amount of the third through groove.

2. The floating adjustable pneumatic dispensing valve according to claim 1, characterized in that, The adjusting member includes: A mounting seat, which is mounted on the upper end of the valve body. At the upper end of the mounting seat, there is an annular connecting portion; A nut member, the lower end of which is connected inside the annular connecting portion and forms a threaded connection with the annular connecting portion. In the middle of the nut member, there is a fourth through groove, which penetrates through the upper and lower end surfaces of the nut member; Among them, the upper end of the valve rod passes through the fourth through groove and extends to the upper end of the nut member. A limiting block is arranged at the upper end of the valve rod. A stroke gap is defined between the limiting block and the nut member to limit the downward stroke of the valve rod.

3. The floating adjustable pneumatic dispensing valve according to claim 2, wherein, A scale ring is sleeved on the upper outer surface of the nut member, and the scale ring is fixedly connected to the nut member to mark the moving distance of the nut member.

4. The floating adjustable pneumatic dispensing valve according to claim 2, wherein, An accommodating groove is arranged inside the side wall of the annular connecting portion. An inner through port is opened on the inner wall of the annular connecting portion, and the inner through port is communicated with the accommodating groove. An outer through port is opened on the outer wall of the annular connecting portion, and the outer through port is communicated with the accommodating groove; A pin is arranged in the accommodating groove. One side of the pin passes through the inner through port and extends to the inside of the annular connecting portion. The other side of the pin passes through the outer through port and extends to the outside of the annular connecting portion. The pin can move in the direction from the outer through port to the inner through port; A second spring member is sleeved on the outer surface of the annular connecting portion. The second spring member presses the side surface of the pin to press it tightly towards the inside of the annular connecting portion; The outer surface of the nut member is provided with a plurality of card slots, and the plurality of card slots all extend along the height direction of the nut member and are sequentially distributed along the circumferential direction of the nut member. One side surface of the pin extends into one of the card slots.

5. The floating adjustable pneumatic dispensing valve according to claim 1, wherein One side of the fluid member is provided with a diversion block, and a diversion groove is arranged in the diversion block. One end of the diversion groove is communicated with the second through groove, one end of the diversion block is connected with a glue bucket, and the discharge port of the glue bucket is communicated with the other end of the diversion groove.

6. The floating adjustable pneumatic dispensing valve according to claim 1, wherein, The floating seat includes: A first adapter, the first adapter is connected to the bottom of the fluid member, the third through groove is arranged in the adapter, a sealing block is arranged at the bottom end of the valve stem, the sealing block is located below the first adapter, and the diameter of the sealing block is larger than the diameter of the third through groove; A first cap, the first cap is sleeved on the lower end of the fluid member, and a first step surface is formed on the inner wall of the first cap; A second adapter, the second adapter is sleeved on the outside of the first adapter, a sliding part is arranged at the top end of the outer surface of the second adapter, and the sliding part is vertically slidably arranged inside the first cap and is located above the first step surface.

7. The floating adjustable pneumatic dispensing valve according to claim 6, wherein A second step surface is formed on the inner wall of the second adapter, a pressing part extending downward is arranged on the outer side surface of the first adapter, and a third spring member is sleeved on the outside of the first adapter, and the third spring member is located between the pressing part and the second step surface.

8. The floating adjustable pneumatic dispensing valve according to claim 6, wherein It further includes a second cap, the lower end of the second cap is sleeved on the outside of the dispensing needle head, and the upper end is threadedly connected with the outer surface of the second adapter.

9. The floating adjustable pneumatic dispensing valve according to claim 8, characterized in that, A third step surface is arranged at the bottom end of the inner wall of the second cap, and a protrusion is arranged on the outside of the dispensing needle head, and the protrusion abuts against the third step surface.

10. The floating adjustable pneumatic dispensing valve according to claim 1, characterized in that, An electromagnetic valve is connected to the pneumatic valve to automatically control the opening and closing of the gas passage.

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