Dispensing and cleaning integrated valve

Abstract

The utility model relates to a dispensing and cleaning integrated valve which comprises a valve seat, a dispensing valve device and a cleaning valve device. The valve seat is provided with a glue inlet flow channel, a cleaning liquid flow channel communicated with the glue inlet flow channel and a cleaning liquid inlet communicated with the cleaning liquid flow channel. The cleaning valve device comprises a cleaning valve element movably installed in the cleaning liquid flow channel, and the cleaning valve element is in linkage with a cleaning air cylinder. A diaphragm sealing piece is arranged in the cleaning liquid flow channel, the diaphragm sealing piece is distributed between the cleaning liquid inlet and the cleaning air cylinder and separates the cleaning liquid inlet from the cleaning air cylinder, the periphery of the diaphragm sealing piece is limited to the inner wall of the cleaning liquid flow channel, and the inner periphery of the diaphragm sealing piece is limited to the periphery of the cleaning valve element. An annular elastic body is arranged between the inner periphery and the outer periphery of the diaphragm sealing piece. The dispensing and cleaning integrated valve is better in sealing performance, cleaning liquid is prevented from flowing back to the cleaning air cylinder or a connecting gap between the cleaning valve element and the cleaning air cylinder, and the cleaning air cylinder is prevented from being damaged.

Description

Technical Field

[0001] The utility model specifically relates to a dispensing and cleaning integrated valve. Background Art

[0002] A two-component dispensing valve is an automated device used for precisely controlling and mixing two different fluids (usually component A and component B), and is widely applied in industries such as electronic manufacturing, automotive electronics, optoelectronics, etc.

[0003] The Chinese invention patent application document with the publication number of "CN109290133A" discloses a dispensing and cleaning integrated valve for two-component glue. The valve mainly consists of a valve seat, a dispensing valve part, and a cleaning valve part, and can complete mixed glue dispensing and has a cleaning function.

[0004] Among them, the cleaning valve part includes a cleaning cylinder, a cleaning valve body, and a cleaning valve core. Combining with the attached drawings of the specification of this disclosure Figure 4 The connection relationships between the components can be clearly seen. The cleaning valve part has the following defects:

[0005] The sealing method of this cleaning valve is poor, and leakage is extremely likely to occur, resulting in the failure of the cleaning valve part. This is mainly because the cleaning channel only contains a sealing plug and a sealing gasket at the lower end of the cleaning valve core. When cleaning, the cleaning cylinder will drive the cleaning valve core to rise until the three sealing plugs withdraw from the sealing gasket. At this time, the cleaning liquid will fill the cleaning channel and flow back to the connection gap between the cleaning valve core and the cleaning cylinder and into the cleaning cylinder under a relatively large pressure, causing the cleaning cylinder to be blocked until it fails. Content of the Utility Model

[0006] The technical problem to be solved by the utility model is to provide a dispensing and cleaning integrated valve aiming at the deficiencies of the above-mentioned prior art, solve the problem of leakage, prevent the cleaning liquid from flowing back to the cleaning cylinder or the connection gap between the cleaning valve core and the cleaning cylinder, and avoid damage to the cleaning cylinder.

[0007] To achieve the above object, the utility model provides the following technical solution: A dispensing and cleaning integrated valve, including

[0008] A valve seat, on which a glue inlet channel, a cleaning liquid channel communicated with the glue inlet channel, and a cleaning liquid inlet communicated with the cleaning liquid channel are provided;

[0009] A dispensing valve device, which can send the glue into the glue inlet channel;

[0010] A cleaning valve device, the cleaning valve device includes a cleaning valve core movably installed in the cleaning liquid channel, and the cleaning valve core is linked with a cleaning cylinder;

[0011] It is characterized in that: a diaphragm seal is provided in the cleaning liquid flow channel, the diaphragm seal is distributed between the cleaning liquid inlet and the cleaning cylinder and separates the cleaning liquid inlet and the cleaning cylinder from each other, the outer periphery of the diaphragm seal is limited to the inner wall of the cleaning liquid flow channel, the inner periphery of the diaphragm seal is limited to the outer periphery of the cleaning valve core, and an annular elastic body is provided between the inner periphery and the outer periphery of the diaphragm seal.

[0012] With the above technical solution, a diaphragm seal is designed, and the outer periphery of the diaphragm seal is limited to the inner wall of the cleaning liquid flow channel, and the inner periphery of the diaphragm seal is limited to the outer periphery of the cleaning valve core. This design enables the inner periphery of the diaphragm seal to follow the movement of the cleaning valve core during the reciprocating movement of the cleaning valve core. During this process, the sealing point does not change, which can better solve the leakage problem and prevent the cleaning liquid from flowing back to the cleaning cylinder or the connection gap between the cleaning valve core and the cleaning cylinder, avoiding damage to the cleaning cylinder; further, an annular elastic body is designed to promote the overall extension of the diaphragm seal, so as to adapt to the influence brought by the reciprocating movement of the cleaning cylinder and ensure that the sealing point does not change. It should be noted again that: the glue inlet flow channel and the cleaning liquid flow channel mentioned in this technical solution are limited in number. For example, for a single-component dispensing and cleaning integrated valve, one group of glue inlet flow channels and cleaning liquid flow channels can be designed respectively. For a two-component dispensing and cleaning valve, two groups of glue inlet flow channels need to be set, and the cleaning liquid flow channel can be designed with one group or multiple groups. Therefore, the number will change according to the actual situation.

[0013] The above-mentioned dispensing and cleaning integrated valve can be further set as: an inner ring groove is provided on the inner wall of the cleaning liquid flow channel, a first annular washer is provided on the outer periphery of the diaphragm seal, and the first annular washer is inserted into the inner ring groove; an outer ring groove is provided on the outer periphery of the cleaning valve core, a second annular washer is provided on the inner periphery of the diaphragm seal, and the second annular washer is inserted into the outer ring groove; the outer periphery of the annular elastic body is integrally formed with the first annular washer, and the inner periphery of the annular elastic body is integrally formed with the second annular washer.

[0014] With the above technical solution, "the first annular washer is inserted into the inner ring groove and the second annular washer is inserted into the outer ring groove" can realize the limit of the outer periphery of the diaphragm seal and the limit of the inner periphery and the cleaning valve core, avoiding the change of the sealing point of the diaphragm seal. Further, the first annular washer, the annular elastic body, and the second annular washer are integrally formed, reducing the leakage risk. There will be no new sealing points at the connection of the first annular washer, the annular elastic body, and the second annular washer. At the same time, the installation process is simplified. It only needs to insert the first annular washer into the inner ring groove and the second annular washer into the outer ring groove, and the annular elastic body naturally becomes the middle sealing layer.

[0015] The above-mentioned dispensing and cleaning integrated valve can be further configured as follows: the cleaning valve core includes a valve stem and a piston rod linked with a cleaning cylinder. An internal threaded hole is provided at the upper end of the valve stem, and an external thread capable of being threadedly connected to the internal threaded hole is provided at the lower end of the piston rod. The outer ring groove is arranged on the outer periphery of the piston rod, the valve stem is distributed below the outer ring groove, and the upper end surface of the valve stem contacts the lower end surface of the second annular gasket.

[0016] With the above technical solution, it is convenient to assemble the diaphragm seal and the cleaning valve core. Now, the second annular gasket is sleeved in the outer ring groove. Next, the valve stem can be installed at the lower end of the piston rod by using the internal threaded hole and the external thread. At the same time, the upper end surface of the valve stem limits the lower end surface of the second annular gasket.

[0017] The above-mentioned dispensing and cleaning integrated valve can be further configured as follows: the valve seat includes a dispensing valve seat and a cleaning valve seat. The glue inlet channel is distributed on the dispensing valve seat. A first installation hole is communicated with the side of the glue inlet channel. A first plug body inserted into the first installation hole is provided on the cleaning valve seat. The cleaning liquid channel passes through the first plug body until it is communicated with the glue inlet channel. A copper tube distributed at the lower end of the first plug body is provided in the first installation hole. A conical flow channel is provided at one end of the copper tube close to the first plug body, and a cylindrical flow channel is provided at the other end of the copper tube. One end of the cylindrical flow channel is communicated with the small end of the conical flow channel, and the other end of the cylindrical flow channel is communicated with the glue inlet channel. A conical plug is provided at the lower end of the valve stem, and the cleaning cylinder can drive the conical plug to reciprocate along the central axis of the cleaning liquid channel to control the opening and closing of the cylindrical flow channel.

[0018] With the above technical solution, the valve seat is divided into a dispensing valve seat and a cleaning valve seat, which is convenient for the processing of the glue inlet channel and the cleaning liquid channel and also convenient for the installation of the copper tube. The copper tube is arranged at the lower end of the cleaning liquid channel mainly because the cleaning liquid generally has strong corrosiveness, while copper has strong chemical resistance and is not easily corroded by the cleaning liquid. Further, a conical flow channel and a cylindrical flow channel liquid outlet flow channel structure are arranged in the copper tube. The cleaning liquid enters the conical flow channel from the cleaning liquid channel and then sprays out through the cylindrical flow channel. This process will increase the pressure of the cleaning liquid, thereby increasing the cleaning strength. Further, a conical plug is provided to facilitate the lower end of the cleaning valve core to enter the cylindrical flow channel more smoothly without jamming.

[0019] The above-mentioned dispensing and cleaning integrated valve can be further configured as follows: a second plug body is provided at the upper end of the cleaning valve seat, a second installation hole is provided on the body of the cleaning cylinder, the second plug body is inserted into the second installation hole, the inner ring groove is arranged in the cleaning cylinder and distributed at the upper end of the second installation hole, and the first annular gasket is inserted into the inner ring groove and the lower end surface of the first annular gasket contacts the upper end surface of the second plug body.

[0020] With the above technical solution, the second mounting hole and the second plug-in body facilitate the detachable connection between the cleaning valve seat and the cleaning cylinder. Further, an inner ring groove is provided at the upper end of the second mounting hole, and the upper end face of the second plug-in body is used to limit the lower end face of the first annular gasket, which facilitates the installation of the first annular gasket. At the same time, the first annular gasket can seal the connection between the cleaning valve seat and the cleaning cylinder to avoid leakage.

[0021] The above-mentioned integrated dispensing and cleaning valve can be further configured as follows: a guiding hole parallel to the axis direction of the piston rod is provided in the body of the cleaning cylinder, a guiding rod is provided in the guiding hole, a piston is linked to the upper end of the piston rod, and a connection hole connected to the guiding rod is provided on the piston.

[0022] With the above technical solution, the movement stability of the piston rod is improved, that is, the movement stability of the cleaning valve core is improved, avoiding left and right shaking, enhancing the working reliability of the cleaning valve core, and being able to accurately block the cylindrical flow channel.

[0023] The above-mentioned integrated dispensing and cleaning valve can be further configured as follows: the dispensing valve device includes a valve body, an adhesive inlet channel and an adhesive inlet connected to the adhesive inlet channel are provided in the valve body, a ceramic valve core is movably installed in the adhesive inlet channel, a dispensing cylinder is linked to the upper end of the ceramic valve core, the dispensing cylinder can drive the ceramic valve core to reciprocate in the adhesive inlet channel to control the closing or opening of the adhesive inlet channel, and the lower end of the adhesive inlet channel is communicated with the adhesive flow channel.

[0024] With the above technical solution, due to the high hardness and excellent wear resistance of the ceramic material, the ceramic valve core can withstand the wear during continuous use and is not easily damaged, extending the service life of the dispensing valve device. At the same time, the smooth surface of the ceramic material reduces the resistance of the fluid passing through the adhesive inlet channel, improves the fluid control accuracy, and prevents liquid residue and pollution. In addition, the excellent corrosion resistance of the ceramic enables the valve core to resist the erosion of various chemical substances. Most importantly, during the closing process of the adhesive inlet channel by the ceramic valve core, it is a mechanical seal (that is, the cooperation between the ceramic valve core and the first ceramic ring) to prevent fluid leakage, and the work is more reliable.

[0025] The above-mentioned integrated dispensing and cleaning valve can be further configured as follows: a third mounting hole is provided on the dispensing valve seat, a third plug-in body inserted into the third mounting hole is provided at the lower end of the valve body, the adhesive inlet channel passes through the third plug-in body until it is communicated with the adhesive flow channel, a first ceramic ring distributed at the lower end of the adhesive inlet channel is provided in the third plug-in body, a cylindrical plug adapted to the first ceramic ring is provided at the lower end of the ceramic valve core, and a rectangular sealing gasket distributed at the lower end of the first ceramic ring is provided in the third mounting hole.

[0026] With the above technical solution, the seal between the cylindrical plug of the ceramic valve core and the first ceramic ring is a mechanical seal, which can better prevent fluid leakage and work more reliably. The rectangular sealing gasket can prevent leakage at the third mounting hole and, at the same time, as a clearance compensator, can well compensate for the clearance between the third plug-in body and the third mounting hole along the axial direction. At the same time, the connection method between the third mounting hole and the third plug-in body facilitates the installation of the first ceramic ring and the rectangular sealing gasket.

[0027] The above glue dispensing and cleaning integrated valve can be further configured as follows: Two sets of outward-expanded seals are sleeved on the outer periphery of the ceramic valve core and are distributed vertically. The outer periphery of the outward-expanded seals adheres to the inner wall of the glue inlet channel or the glue dispensing cylinder. An annular groove is provided on the end face of the outward-expanded seal, and annular sealing strips are provided on both sides of the annular groove. One set of annular sealing strips inclines towards the ceramic valve core, and one set of annular sealing strips inclines towards the inner wall of the glue inlet channel or the inner wall of the glue dispensing cylinder; A second ceramic ring is provided between the two sets of outward-expanded seals, and the second ceramic ring is sleeved on the outer periphery of the ceramic valve core.

[0028] With the above technical solution, when the ceramic valve core reciprocates, one set of annular sealing strips on the upper and lower two sets of outward-expanded seals will be closer to the inner wall of the glue inlet channel or the inner wall of the glue dispensing cylinder. The other set will be closer to the ceramic valve core, thus avoiding leakage. The second ceramic ring is further provided to guide the ceramic valve core and prevent the ceramic valve core from deflecting during the reciprocating movement.

[0029] The above glue dispensing and cleaning integrated valve can be further configured as follows: At least two sets of glue inlet channels are provided on the glue dispensing valve seat, and each set of glue inlet channels corresponds to a set of glue inlet channels and a set of cleaning liquid channels. A ceramic valve core is movably installed in each set of glue inlet channels, and a cleaning valve core is installed in each set of cleaning liquid channels; A mixing tube is provided at the lower end of the glue dispensing valve seat, and a mixing cavity is distributed in the mixing tube. The upper end of the mixing tube is connected with a nut, and the nut is threadedly connected to the lower end of the glue dispensing valve seat. The lower ends of at least two sets of glue inlet channels are all communicated with the mixing tube, and a spiral sheet body is spirally arranged along the central axis of the mixing tube.

[0030] With the above technical solution, when the present application is applied to a glue dispensing valve for two-component or multi-component mixing, the mixing tube can mix multiple groups of fluids. At the same time, when the fluid passes through the spiral sheet body, it spirally flows downward to the glue outlet while being automatically mixed, and the mixing is more uniform. Further, the cleaning liquid will converge into the mixing tube after passing through the glue inlet channel and flow downward along the spiral sheet body for sequential cleaning, and the cleaning effect is better.

[0031] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Description of the Drawings

[0032] Figure 1 Overall schematic diagram of the first embodiment of the present utility model;

[0033] Figure 2 Schematic cross-sectional view of the cleaning valve device of the first embodiment of the present utility model;

[0034] Figure 3 Schematic cross-sectional view of the dispensing valve device of the first embodiment of the present utility model;

[0035] Figure 4 is Figure 2 Partial enlarged schematic view at position A in

[0036] Figure 5 is Figure 2 Partial enlarged schematic view at position B in

[0037] Figure 6 is Figure 3 Partial enlarged schematic view at position C in

[0038] Figure 7 is Figure 3 Partial enlarged schematic view at position D in

[0039] Figure 8 Hook schematic diagram of the second embodiment of the present utility model;

[0040] Figure 9 Schematic diagram of the locked state of the second embodiment of the present utility model.

[0041] Label annotation: Dispensing valve seat a, glue inlet channel a1, first mounting hole a2, third mounting hole a3, rectangular sealing gasket a4; cleaning valve seat b, second plug-in body b1, cleaning liquid flow channel b2, cleaning liquid inlet b3, first plug-in body b4, copper pipe b5, cylindrical flow channel b6, conical flow channel b7; dispensing valve device c, valve body c1, glue inlet channel c2, glue inlet c3, ceramic valve core c4, third plug-in body c5, first ceramic ring c6, cylindrical plug c7, outward-expanding seal c8, dispensing cylinder c9, annular groove c10, annular sealing strip c11, second ceramic ring c12; cleaning valve device d, cleaning valve core d1, cleaning cylinder d2, diaphragm seal d3, annular elastic body d4, first annular washer d5, second annular washer d6, inner ring groove d7, outer ring groove d8, valve rod d9, piston rod d10, internal thread hole d11, conical plug d12, second mounting hole d13, guide hole d14, guide rod d15, piston d16; mixing tube e, nut e1, spiral sheet body e2. Detailed implementation manners

[0042] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0043] Embodiment 1: As Figures 1 to 7 shown in the dispensing and cleaning integrated valve, which includes

[0044] a valve seat, the valve seat includes a dispensing valve seat a and a cleaning valve seat b. There are two groups of glue inlet channels a1 provided on the dispensing valve seat a, and two groups of cleaning liquid channels b2 provided on the cleaning valve seat b. Each group of glue inlet channels a1 is communicated with a group of cleaning liquid channels b2, and each group of cleaning liquid channels b2 is communicated with a group of cleaning liquid inlets b3.

[0045] A dispensing valve device c, which includes two groups of valve bodies c1. A group of glue inlet channels c2 are provided in each group of valve bodies c1. Each group of glue inlet channels c2 is communicated with a group of glue inlets c3. A ceramic valve core c4 is movably installed in the glue inlet channel c2. The upper end of the ceramic valve core c4 is linked with a dispensing cylinder c9. The dispensing cylinder c9 can drive the ceramic valve core c4 to reciprocate in the glue inlet channel c2 to control the opening or closing of the glue inlet channel c2. The lower end of each group of glue inlet channels c2 is communicated with a group of glue inlet channels a1. Due to the high hardness and excellent wear resistance of the ceramic material, the ceramic valve core c4 can withstand the wear during continuous use and is not easily damaged, extending the service life of the dispensing valve device c. At the same time, the smooth surface of the ceramic material reduces the resistance of the fluid passing through the glue inlet channel c2, improves the fluid control accuracy, and prevents liquid residue and pollution. In addition, the excellent corrosion resistance of the ceramic enables the valve core to resist the erosion of various chemical substances. Most importantly, during the process of controlling the glue inlet channel c2, the ceramic valve core c4 is a mechanical seal to prevent fluid leakage, and the work is more reliable.

[0046] A cleaning valve device d, the cleaning valve device d includes a cleaning valve core d1 movably installed in the cleaning liquid channel b2, and the cleaning valve core d1 is linked with a cleaning cylinder d2;

[0047] In each cleaning liquid flow channel b2, a diaphragm seal d3 is provided. The diaphragm seal d3 is distributed between the cleaning liquid inlet b3 and the cleaning cylinder d2 and separates the cleaning liquid inlet b3 from the cleaning cylinder d2. The outer periphery of the diaphragm seal d3 is limited to the inner wall of the cleaning liquid flow channel b2, and the inner periphery of the diaphragm seal d3 is limited to the outer periphery of the cleaning valve core d1. An annular elastic body d4 is provided between the inner and outer peripheries of the diaphragm seal d3. The diaphragm seal d3 is designed such that its outer periphery is limited to the inner wall of the cleaning liquid flow channel b2 and its inner periphery is limited to the outer periphery of the cleaning valve core d1. This design enables the inner periphery of the diaphragm seal d3 to follow the movement of the cleaning valve core d1 during the reciprocating movement. During this process, the sealing point does not change, which can better solve the leakage problem and prevent the cleaning liquid from flowing back into the cleaning cylinder d2 or the connection gap between the cleaning valve core d1 and the cleaning cylinder d2, avoiding damage to the cleaning cylinder d2. Further, the annular elastic body d4 is designed to cause the entire diaphragm seal d3 to extend, thereby adapting to the influence brought by the reciprocating movement of the cleaning cylinder d2 and ensuring that the sealing point does not change.

[0048] An inner ring groove d7 is provided on the inner wall of the cleaning liquid flow channel b2. A first annular washer d5 is provided on the outer periphery of the diaphragm seal d3, and the first annular washer d5 is inserted into the inner ring groove d7. An outer ring groove d8 is provided on the outer periphery of the cleaning valve core d1. A second annular washer d6 is provided on the inner periphery of the diaphragm seal d3, and the second annular washer d6 is inserted into the outer ring groove d8. The outer periphery of the annular elastic body d4 is integrally formed with the first annular washer d5, and the inner periphery of the annular elastic body d4 is integrally formed with the second annular washer d6. "The first annular washer d5 is inserted into the inner ring groove d7 and the second annular washer d6 is inserted into the outer ring groove d8" can achieve the limitation of the outer periphery of the diaphragm seal d3 and the limitation of the inner periphery of the diaphragm seal d3 with the cleaning valve core d1, avoiding the change of the sealing point of the diaphragm seal d3. Further, the first annular washer d5, the annular elastic body d4, and the second annular washer d6 are integrally formed, reducing the leakage risk. No new sealing point will appear at the connection of the first annular washer d5, the annular elastic body d4, and the second annular washer d6. At the same time, the installation process is simplified. It only needs to insert the first annular washer d5 into the inner ring groove d7 and the second annular washer d6 into the outer ring groove d8, and the annular elastic body d4 naturally becomes the middle sealing layer.

[0049] The cleaning valve core d1 includes a valve stem d9 and a piston rod d10 linked to the cleaning cylinder d2. An internal threaded hole d11 is provided at the upper end of the valve stem d9, and an external thread capable of being threadedly connected to the internal threaded hole d11 is provided at the lower end of the piston rod d10. An outer ring groove d8 is provided on the outer periphery of the piston rod d10, the valve stem d9 is distributed below the outer ring groove d8, and the upper end surface of the valve stem d9 contacts the lower end surface of the second annular washer d6. To facilitate the assembly of the diaphragm seal d3 and the cleaning valve core d1, the second annular washer d6 is now sleeved in the outer ring groove d8. Next, the valve stem d9 can be installed at the lower end of the piston rod d10 by using the internal threaded hole d11 and the external thread. At the same time, the upper end surface of the valve stem d9 limits the lower end surface of the second annular washer d6.

[0050] Each side of the glue inlet channel a1 is communicated with a first mounting hole a2. There are two groups of first plug-in bodies b4 provided on the cleaning valve seat b, and each group of first plug-in bodies b4 is respectively inserted into a group of first mounting holes a2. The cleaning liquid channel b2 passes through the first plug-in body b4 until it is communicated with the glue inlet channel a1. A copper pipe b5 distributed at the lower end of the first plug-in body b4 is provided in the first mounting hole a2. A tapered channel b7 is provided at one end of the copper pipe b5 close to the first plug-in body b4, and a cylindrical channel b6 is provided at the other end of the copper pipe b5. One end of the cylindrical channel b6 is communicated with the small end of the tapered channel b7, and the other end of the cylindrical channel b6 is communicated with the glue inlet channel a1. A conical plug d12 is provided at the lower end of the valve stem d9. The cleaning cylinder d2 can drive the conical plug d12 to reciprocate along the central axis of the cleaning liquid channel b2 to control the opening and closing of the cylindrical channel b6. Dividing the valve seat into a dispensing valve seat a and a cleaning valve seat b facilitates the processing of the glue inlet channel a1 and the cleaning liquid channel b2, and also facilitates the installation of the copper pipe b5. The copper pipe b5 is provided at the lower end of the cleaning liquid channel b2 mainly because the cleaning liquid generally has strong corrosiveness, and copper has strong chemical resistance and is not easily corroded by the cleaning liquid. Further, a liquid outlet channel structure of a tapered channel b7 and a cylindrical channel b6 is provided inside the copper pipe b5. The cleaning liquid enters the tapered channel b7 from the cleaning liquid channel b2 and then sprays out through the cylindrical channel b6. This process will increase the pressure of the cleaning liquid, thereby increasing the cleaning strength. Further, the conical plug d12 is provided to facilitate the lower end part of the cleaning valve core d1 to enter the cylindrical channel b6 more smoothly without jamming.

[0051] Two groups of second plug connectors b1 are provided at the upper end of the cleaning valve seat b. One group of second mounting holes d13 is provided on the body of each cleaning cylinder d2. Each group of second plug connectors b1 is inserted into one group of second mounting holes d13. The inner ring groove d7 is arranged inside the cleaning cylinder d2 and distributed at the upper end of the second mounting hole d13. The first annular gasket d5 is inserted into the inner ring groove d7, and the lower end surface of the first annular gasket d5 contacts the upper end surface of the second plug connector b1. The second mounting hole d13 and the second plug connector b1 facilitate the detachable connection between the cleaning valve seat b and the cleaning cylinder d2. Further, the inner ring groove d7 is arranged at the upper end of the second mounting hole d13, and the upper end surface of the second plug connector b1 is used to limit the lower end surface of the first annular gasket d5, which is convenient for the installation of the first annular gasket d5. At the same time, the first annular gasket d5 can seal the connection between the cleaning valve seat b and the cleaning cylinder d2 to avoid leakage.

[0052] A guide hole d14 is arranged inside the body of the cleaning cylinder d2 and distributed in the direction parallel to the axis of the piston rod d10. A guide rod d15 is arranged inside the guide hole d14. The upper end of the piston rod d10 is linked with a piston d16, and a connection hole for connecting with the guide rod d15 is arranged on the piston d16. The movement stability of the piston rod d10 is improved, that is, the movement stability of the cleaning valve core d1 is improved, avoiding left - right shaking, and the working reliability of the cleaning valve core d1 is improved, and the cylindrical flow channel b6 can be accurately blocked.

[0053] Two groups of third mounting holes a3 are provided on the dispensing valve seat a. One group of third plug connectors c5 inserted into one group of third mounting holes a3 is provided at the lower end of each valve body c1. The glue inlet channel c2 runs through the third plug connector c5 until it communicates with the glue inlet flow channel a1. A first ceramic ring c6 distributed at the lower end of the glue inlet channel c2 is arranged inside the third plug connector c5. A cylindrical plug c7 capable of matching with the first ceramic ring c6 is arranged at the lower end of the ceramic valve core c4. A rectangular sealing gasket a4 distributed at the lower end of the first ceramic ring c6 is arranged inside the third mounting hole a3. The seal between the cylindrical plug c7 of the ceramic valve core c4 and the first ceramic ring c6 is a mechanical seal, which can better prevent fluid leakage and work more reliably. The rectangular sealing gasket a4 can prevent leakage at the third mounting hole a3. At the same time, as a clearance compensation part, it can well compensate the axial clearance between the third plug connector c5 and the third mounting hole a3. At the same time, the connection mode between the third mounting hole a3 and the third plug connector c5 facilitates the installation of the first ceramic ring c6 and the rectangular sealing gasket a4.

[0054] Two sets of outward-expanding seals c8 are sleeved on the outer periphery of the ceramic valve core c4, and are distributed up and down relatively. The outer periphery of the outward-expanding seal c8 is attached to the inner wall of the glue inlet channel c2 or the dispensing cylinder c9. An annular groove c10 is provided on the end face of the outward-expanding seal c8. Two annular sealing strips c11 are respectively arranged on both sides of the annular groove c10. One set of annular sealing strips c11 inclines towards the ceramic valve core c4, and one set of annular sealing strips c11 inclines towards the inner wall of the glue inlet channel c2 or the inner wall of the dispensing cylinder c9. When the ceramic valve core c4 reciprocates, one set of annular sealing strips c11 on the upper and lower two sets of outward-expanding seals c8 will be closer to the inner wall of the glue inlet channel c2 or the inner wall of the dispensing cylinder c9. The other set will be closer to the ceramic valve core c4, thereby avoiding leakage.

[0055] A second ceramic ring c12 is arranged between the two sets of outward-expanding seals c8, and the second ceramic ring c12 is sleeved on the outer periphery of the ceramic valve core c4. It guides the ceramic valve core c4 to avoid deflection of the ceramic valve core c4 during the reciprocating motion.

[0056] A mixing tube e is provided at the lower end of the dispensing valve seat a. A mixing chamber is distributed in the mixing tube e. The upper end of the mixing tube e is connected with a nut e1, and the nut e1 is threadedly connected with the lower end of the dispensing valve seat a. The lower ends of the two glue inlet channels a1 are both communicated with the mixing tube e. A spiral blade body e2 is arranged in the mixing tube e in a spiral shape along the central axis of the mixing tube e. In the second embodiment, it is a two-component dispensing valve. The mixing tube e can mix the two fluids. At the same time, when the fluid passes through the spiral blade body e2, it spirals downward to the glue outlet while being automatically mixed, and the mixing is more uniform. Further, the cleaning liquid will converge into the mixing tube e after passing through the glue inlet channel c2 and flow downward along the spiral blade body e2 for successive cleaning, and the cleaning effect is better.

[0057] Working principle:

[0058] During dispensing, the conical plug d12 on the cleaning valve core d1 blocks the cylindrical flow channel b6 under the drive of the cleaning cylinder d2, and the cleaning function is closed; the ceramic valve core c4 drives the cylindrical plug c7 to withdraw from the first ceramic ring c6 under the drive of the dispensing cylinder c9, the glue inlet channel c2 is opened, and the two glue inlets c3 respectively inject the colloid into the glue inlet channel c2. The colloid in the two glue inlet channels c2 enters the glue inlet channels a1. The colloid in the two glue inlet channels a1 flows into the mixing tube e, is automatically mixed under the action of the mixing tube e, and finally is discharged through the glue outlet.

[0059] During cleaning: The conical plugs d12 on the two sets of cleaning valve cores d1 are driven by the cleaning cylinder d2 to withdraw from the cylindrical flow channel b6, the cleaning liquid flow channel b2 is opened, the cleaning liquid inlet b3 inputs the cleaning liquid, and the cleaning liquid flows through the cylindrical flow channel b6 at the lower end of the cleaning liquid flow channel b2. A relatively large jet force will be generated during this process to flush the glue inlet flow channel a1. The cleaning liquid enters the mixing tube e to clean the mixing tube e.

[0060] Embodiment 2: As Figures 8 to 9 shown in the dispensing and cleaning integrated valve. Compared with Embodiment 1, Embodiment 2 is in the form of single-component glue.

[0061] The dispensing and cleaning integrated valve includes a valve seat, a dispensing valve device c, and a cleaning valve device d, and there is no need to set up a mixing tube e.

[0062] The valve seat of the dispensing and cleaning integrated valve includes a dispensing valve seat a and a cleaning valve seat b. A set of glue inlet flow channels a1 are provided on the dispensing valve seat a, a set of cleaning liquid flow channels b2 are provided on the cleaning valve seat b, the glue inlet flow channels a1 are communicated with the cleaning liquid flow channels b2, and a set of cleaning liquid inlets b3 are communicated with the cleaning liquid flow channels b2.

[0063] A ceramic valve core c4 is movably installed in the glue inlet channel c2, a cleaning valve core d1 is installed in the cleaning liquid flow channel b2, the ceramic valve core c4 is linked with a dispensing cylinder c9, and the cleaning valve core d1 is linked with a cleaning cylinder d2. The structures and installation methods of the ceramic valve core c4 and the cleaning valve core d1 are the same as those of the ceramic valve core c4 and the cleaning valve core d1 in Embodiment 1.

[0064] A diaphragm seal d3 is provided in the cleaning liquid flow channel b2, and the structure and installation method of the diaphragm seal d3 are the same as those in Embodiment 1.

[0065] Two sets of outward-expanding seals c8 are sleeved on the outer periphery of the ceramic valve core c4 and are distributed up and down relatively. The structure and installation method of the outward-expanding seal c8 are the same as those in Embodiment 1.

[0066] Compared with Embodiment 1 and Embodiment 2,

[0067] In terms of structure: Embodiment 1 is a two-component dispensing and cleaning integrated valve, so a mixing tube e needs to be installed at the lower end to mix the two-component colloid, and the glue inlet channel c2, the glue inlet flow channel a1, and the cleaning liquid flow channel b2 are all two sets. The corresponding ceramic valve core c4 and cleaning valve core d1 are also two sets; Embodiment 2 is a single-component dispensing and cleaning integrated valve, so there is no need to install a mixing tube e, and the glue inlet channel c2, the glue inlet flow channel a1, and the cleaning liquid flow channel b2 are all one set. The ceramic valve core c4 and cleaning valve core d1 matching each flow channel are also one set. Therefore, the two embodiments only differ in the quantity.

[0068] In terms of effects: Both of them can solve the problem of cleaning liquid leakage in the prior art, can not only achieve dispensing, but also achieve tilting, and there will be no leakage.

Claims

1. Dispensing and cleaning integrated valve, including A valve seat, wherein the valve seat is provided with a glue inlet flow channel, a cleaning liquid flow channel connected to the glue inlet flow channel, and a cleaning liquid inlet connected to the cleaning liquid flow channel; A dispensing valve device, which can deliver the colloid into the glue inlet flow channel; A cleaning valve device, the cleaning valve device comprising a cleaning valve core movably installed in a cleaning liquid flow channel, the cleaning valve core being linked to a cleaning cylinder; It is characterized in that: a diaphragm seal is provided in the cleaning liquid flow channel, the diaphragm seal is distributed between the cleaning liquid inlet and the cleaning cylinder and separates the cleaning liquid inlet from the cleaning cylinder, the outer periphery of the diaphragm seal is located at the inner wall of the cleaning liquid flow channel, the inner periphery of the diaphragm seal is located at the outer periphery of the cleaning valve core, and an annular elastomer is provided between the inner periphery and the outer periphery of the diaphragm seal.

2. The dispensing and cleaning integrated valve according to claim 1, characterized in that: An inner ring groove is provided on the inner wall of the cleaning liquid flow channel, a first ring gasket is provided on the outer periphery of the diaphragm seal, and the first ring gasket is inserted into the inner ring groove; an outer ring groove is provided on the outer periphery of the cleaning valve core, a second ring gasket is provided on the inner periphery of the diaphragm seal, and the second ring gasket is inserted into the outer ring groove; the outer periphery of the annular elastomer is integrally formed with the first annular gasket, and the inner periphery of the annular elastomer is integrally formed with the second annular gasket.

3. The dispensing and cleaning integrated valve according to claim 2, characterized in that: The cleaning valve core includes a valve stem and a piston rod linked to the cleaning cylinder, the upper end of the valve stem is provided with an internal threaded hole, the lower end of the piston rod is provided with an external thread that can be threadedly connected to the internal threaded hole, the outer ring groove is arranged on the outer periphery of the piston rod, the valve stem is distributed below the outer ring groove and the upper end surface of the valve stem is in contact with the lower end surface of the second annular gasket.

4. The dispensing and cleaning integrated valve according to claim 3, characterized in that: The valve seat includes a dispensing valve seat and a cleaning valve seat. The glue feed channel is distributed on the dispensing valve seat. The side of the glue feed channel is connected to a first mounting hole. The cleaning valve seat is provided with a first plug-in body inserted into the first mounting hole. The cleaning liquid flow channel passes through the first plug-in body until it is connected to the glue feed channel. A copper tube distributed at the lower end of the first plug-in body is provided in the first mounting hole. A conical flow channel is provided at one end of the copper tube close to the first plug-in body, and a cylindrical flow channel is provided at the other end of the copper tube. One end of the cylindrical flow channel is connected to the small end of the conical flow channel, and the other end of the cylindrical flow channel is connected to the glue feed channel. A conical plug is provided at the lower end of the valve stem, and the cleaning cylinder can drive the conical plug to reciprocate along the central axis of the cleaning liquid flow channel to control the closing and opening of the cylindrical flow channel.

5. The dispensing and cleaning integrated valve according to claim 4, characterized in that: A second plug-in body is provided at the upper end of the cleaning valve seat, a second mounting hole is provided on the main body of the cleaning cylinder, the second plug-in body is inserted into the second mounting hole, the inner ring groove is arranged in the cleaning cylinder and distributed at the upper end of the second mounting hole, the first annular gasket is inserted into the inner ring groove and the lower end surface of the first annular gasket contacts with the upper end surface of the second plug-in body.

6. The dispensing and cleaning integrated valve according to claim 5, characterized in that: The cleaning cylinder body is provided with a guide hole parallel to the axis direction of the piston rod, a guide rod is provided in the guide hole, the upper end of the piston rod is linked with a piston, and the piston is provided with a connecting hole connected with the guide rod.

7. The dispensing and cleaning integrated valve according to any one of claims 4 to 6, characterized in that: The glue dispensing valve device includes a valve body, a glue feed channel and a glue feed port connected to the glue feed channel are provided in the valve body, a ceramic valve core is movably installed in the glue feed channel, the upper end of the ceramic valve core is linked to a glue dispensing cylinder, and the glue dispensing cylinder can drive the ceramic valve core to reciprocate in the glue feed channel to control the closing or opening of the glue feed channel, and the lower end of the glue feed channel is connected to the glue feed flow channel.

8. The dispensing and cleaning integrated valve according to claim 7, characterized in that: A third mounting hole is provided on the dispensing valve seat, a third plug-in body is provided at the lower end of the valve body and is inserted into the third mounting hole, the glue feed channel passes through the third plug-in body until it is connected with the glue feed channel, a first ceramic ring is provided at the lower end of the glue feed channel, a cylindrical plug that can be matched with the first ceramic ring is provided at the lower end of the ceramic valve core, and a rectangular sealing gasket is provided at the lower end of the first ceramic ring in the third mounting hole.

9. The dispensing and cleaning integrated valve according to claim 8, characterized in that: The outer periphery of the ceramic valve core is sleeved with two groups of outward-expanding seals which are relatively distributed up and down. The outer periphery of the outward-expanding seals is attached to the inner wall of the glue feed channel or the glue dispensing cylinder. The end face of the outward-expanding seal is provided with an annular groove, and annular sealing strips are provided on both sides of the annular groove. One group of annular sealing strips is inclined toward the ceramic valve core, and the other group of annular sealing strips is inclined toward the inner wall of the glue feed channel or the inner wall of the glue dispensing cylinder. A second ceramic ring is provided between the two groups of outward-expanding seals, and the second ceramic ring is sleeved on the outer periphery of the ceramic valve core.

10. The dispensing and cleaning integrated valve according to claim 7, characterized in that: At least two groups of glue feed channels are provided on the glue dispensing valve seat, each group of glue feed channels corresponds to a group of glue feed channels and a group of cleaning liquid channels, a ceramic valve core is movably installed in each group of glue feed channels, and a cleaning valve core is installed in each group of cleaning liquid channels; a mixing tube is provided at the lower end of the glue dispensing valve seat, and a mixing cavity is distributed in the mixing tube, a nut is connected to the upper end of the mixing tube, and the nut is threadedly connected to the lower end of the glue dispensing valve seat, the lower ends of at least two groups of glue feed channels are connected to the mixing tube, and a spiral sheet body spirally arranged along the central axis of the mixing tube is provided in the mixing tube.

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