Rotary gluing valve and gluing equipment

Abstract

The invention discloses a rotary gluing valve and gluing equipment. A valve body is provided with a plurality of valve body sealing surfaces of which the diameters are sequentially reduced in the glue outlet direction; a first channel for discharging glue is formed in the axis of the valve core; the diameter of the valve core is sequentially increased along the glue discharging direction; the valve core comprises a first shaft section and a second shaft section; the rotary sealing assembly comprises an annular supporting body fixedly installed on the valve body and a plurality of sealing ring sets in one-to-one correspondence with the sealing faces of the valve body. Each sealing ring set comprises a first sealing ring installed on the inner ring of the supporting body and a second sealing ring installed on the outer ring of the supporting body and connected with the sealing faces of the valve body in a sealed mode. One first sealing ring in two adjacent sealing ring groups is in sealed connection with the first shaft section, and the other first sealing ring is in sealed connection with the second shaft section, so that a first buffer cavity is formed, and a first inlet communicated with the first channel is formed in the side wall of the first shaft section corresponding to the first buffer cavity; and a first glue inlet hole is formed in the valve body sealing surface with a larger diameter corresponding to the first buffer cavity, so that the sealing performance of the sealing structure is improved, and the maintenance frequency is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic glue coating, and in particular to a rotary glue coating valve and a glue coating device. Background Art

[0002] When an automatic glue coating device is applied, for the problem that different glue coating directions need to be adapted to the flat glue outlet structure, a rotary glue coating valve is usually used for direction adjustment. The valve drives a shaft-shaped valve core to rotate through a driving mechanism, so that the flat glue nozzle installed at the end generates circumferential deflection, thereby ensuring that the width direction of the glue nozzle is always perpendicular to the glue coating trajectory.

[0003] In the existing structure of the rotary glue coating valve, the valve body is provided with a glue inlet, the valve core is installed in the valve body through a sealing structure, and a glue storage chamber is formed between the valve core and the inner cavity of the valve body. A glue channel communicating the glue storage chamber with the glue outlet is provided in the valve core, and a glue nozzle is installed at the end of the glue channel. Among them, a Gleason ring is mainly used as a dynamic sealing element between the valve core and the valve body to form a glue storage chamber.

[0004] However, in actual application of this sealing structure, the sealing ring is prone to wear and failure, resulting in glue leakage along the axial gap, which causes problems such as short equipment maintenance cycle and frequent manual intervention, seriously affecting the continuity and stability of the glue coating process. Summary of the Invention

[0005] The applicant of the present invention aims at the above-mentioned disadvantages in the existing production technology, and provides a rotary glue coating valve and a glue coating device, so as to improve the sealing performance of the sealing structure, reduce the maintenance frequency, and improve the operation convenience.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A rotary glue coating valve, comprising:

[0008] A valve body, provided with a plurality of valve body sealing surfaces whose diameters gradually decrease along the glue outlet direction;

[0009] A valve core, with a first channel for glue outlet provided at its axis, the diameter of the valve core gradually increases along the glue outlet direction and includes a first shaft section and a second shaft section;

[0010] A rotary sealing assembly, including an annular support body fixedly installed on the valve body and a plurality of seal ring groups corresponding to the valve body sealing surfaces one by one. A seal ring group includes a first seal ring installed on the inner ring of the support body and a second seal ring installed on the outer ring of the support body and sealingly connected to the valve body sealing surface;

[0011] Among them, after one first sealing ring in two adjacent sealing ring groups is sealingly connected to the first shaft section and the other first sealing ring is sealingly connected to the second shaft section, a first buffer cavity is formed. A first inlet communicating with the first channel is provided on the side wall of the first shaft section corresponding to the first buffer cavity, and a first glue inlet hole is provided on the valve body sealing surface with a larger diameter corresponding to the first buffer cavity.

[0012] As a further improvement of the above technical solution:

[0013] The first sealing ring is a rotating lip seal, and the second sealing ring is an O-ring.

[0014] The support body and a sealing ring group form an annular sealing structure in the cross-sectional direction of the sealing ring group. A through-hole group communicating the valve body sealing surface and the side space of the valve core is provided on the support body between two adjacent sealing ring groups.

[0015] The support body includes an annular bracket and an inner support. A plurality of second sealing rings are installed on the outer wall of the bracket. The inner wall of the bracket is provided with a plurality of intermediate sealing surfaces whose diameters gradually decrease along the glue outlet direction. The intermediate sealing surfaces correspond to the valve body sealing surfaces one by one. An annular thinning structure is provided on the outer wall of the bracket between two adjacent intermediate sealing surfaces, and a plurality of first through-holes are evenly opened at the same time;

[0016] The inner support includes a plurality of support rings stacked inside the bracket. The outer ring of the support ring is provided with an intermediate sealing ring sealingly connected to the intermediate sealing surface. Annular thinning structures are provided on both the inner and outer walls of the inner support between two adjacent intermediate sealing rings, and a plurality of second through-holes are evenly opened. The second through-holes and the first through-holes are staggered with each other. The through-hole group includes the first through-holes and the second through-holes located in the same cross-section;

[0017] An installation groove for installing the first sealing ring is provided on the inner ring of the support ring.

[0018] After two first sealing rings in four groups of adjacent sealing ring groups are sealingly connected to the first shaft section and the other two first sealing rings are sealingly connected to the second shaft section, a first lubricating cavity, the first buffer cavity and a second lubricating cavity are sequentially formed along the glue outlet direction. The first lubricating cavity and the second lubricating cavity are used for storing softening agent;

[0019] Lubricating holes are provided on the valve body sealing surfaces with a larger diameter corresponding to the first lubricating cavity and the second lubricating cavity.

[0020] It further includes a softening agent storage pipe communicating with the lubricating holes. The softening agent storage pipe is made of a transparent material.

[0021] The valve core further includes a third shaft section connected to the second shaft section and having a diameter larger than that of the second shaft section. A plurality of second channels axially consistent with the valve core are evenly distributed around the first channel.

[0022] One of the first sealing rings in the other two adjacent sealing ring groups is sealingly connected to the second shaft section, and the other first sealing ring is sealingly connected to the third shaft section to form a second buffer cavity. A plurality of second inlets corresponding to and communicating with the second channels one by one are provided on the second shaft section corresponding to the second buffer cavity, and a second glue inlet hole is provided on the valve body sealing surface with a larger diameter corresponding to the second buffer cavity.

[0023] After every two of the six groups of adjacent sealing ring groups are respectively sealingly connected to the first shaft section, the second shaft section, and the third shaft section, a first lubricating cavity, the first buffer cavity, a second lubricating cavity, the second buffer cavity, and a third lubricating cavity are sequentially formed along the glue outlet direction. The first lubricating cavity, the second lubricating cavity, and the third lubricating cavity are all used for storing softening agents.

[0024] Lubricating holes are provided on the valve body sealing surfaces with larger diameters corresponding to the first lubricating cavity, the second lubricating cavity, and the third lubricating cavity.

[0025] It further includes a driving mechanism and a transmission connection structure.

[0026] A first stop ring is arranged outside the valve body sealing surface with the smallest diameter in the valve body, and a first bearing is installed on the valve body outside the first stop ring.

[0027] The transmission connection structure includes a cover. The cover is fixedly connected to the valve body, and the rotary sealing assembly is fixed between the first stop ring and the cover. The smallest diameter end of the valve core passes through the through hole of the cover, and a second bearing is installed in the through hole. The inner rings of the first bearing and the second bearing are both fixedly connected to the valve core.

[0028] A jack is arranged at the center of the smallest diameter end. When the end cover of the driving mechanism is fixedly connected to the cover, the transmission shaft of the driving mechanism is inserted into the jack to transmit the connection between the transmission shaft and the valve core.

[0029] A glue coating device includes the rotary glue coating valve according to any one of the above 9.

[0030] The beneficial effects of the present invention are as follows:

[0031] The structure of the present invention is compact and reasonable, and the operation is convenient. The sealing between the valve body and the valve core of the rotary glue coating valve is set as a component structure, which is convenient for the optimized design and selection of sealing materials, as well as the overall disassembly and installation of the sealing structure. Step-shaped sealing surfaces are provided on both the valve body and the valve core, and holes are opened near the root of the step on the sealing surface, so that the inner and outer sealing rings will not be scratched when the sealing ring group is installed, improving the sealing performance of the sealing structure, reducing the maintenance frequency, and improving the operation convenience.

[0032] The present invention also has the following advantages:

[0033] (1) The inner hole of the valve body is integrally inverted conical, the outer wall of the valve core is integrally positive conical, and between the valve body and the valve core are a seal component, a buffer cavity for accommodating glue, a lubricating cavity for accommodating softener, and a through-hole group, which reduces the overall weight of the rotary glue coating valve.

[0034] (2) Select a rotary lip seal as the first sealing ring to achieve the rotary seal between the first sealing ring and the valve core. Strengthen the static sealing effect on the outer ring of the rotary seal component and the dynamic sealing effect on the inner ring of the rotary seal component, improving the overall wear resistance and sealing performance of the rotary seal component.

[0035] (3) The split structure of the support body facilitates the overall disassembly of the rotary seal component and also facilitates the installation and disassembly of multiple first sealing rings and second sealing rings outside the valve body.

[0036] (4) Two stepped structures are formed by three shaft sections with different diameters, enabling both inlets for two different glues to avoid the first sealing ring, improving the sealing performance of the two-component rotary glue coating valve's sealing structure, reducing the maintenance frequency, and enhancing the operation convenience.

[0037] (5) Since through-hole groups that connect the sealing surface of the valve body and the side space of the valve core are provided on the support body between two adjacent sealing ring groups, and the through-hole groups are multiple through-holes distributed circumferentially, the glue entering the second buffer cavity from the second glue inlet flows to the valve core through the through-hole groups after being buffered and blocked by the support body, making the flow consistency of the glue entering different second inlets better, and improving the uniformity and quality stability of the glue strip.

[0038] (6) For the support body being an annular bracket and a two-layer nested structure of inner support, the second through-holes and the first through-holes are staggered with each other to achieve multiple annular glue feeding, making the glue feeding flow rate and flow volume of multiple second inlets more uniform.

[0039] (7) The direct plug-in type drive connection structure encloses the drive connection part between the drive shaft and the valve core between the end cover and the seal cover, reducing the overall size and weight of the rotary glue coating valve, facilitating the assembly of the drive mechanism and the valve core, and also facilitating the disassembly and assembly of the rotary seal component. Brief Description of the Drawings

[0040] Figure 1 is a schematic structural diagram of the rotary glue coating equipment of the present invention.

[0041] Figure 2 is a schematic structural diagram of the rotary glue coating valve of the present invention.

[0042] Figure 3 is a partial cross-sectional view of the rotary glue coating valve of the present invention.

[0043] Figure 4 is Figure 3 a cross-sectional view of the A-A section in

[0044] Figure 5 is Figure 3 The sectional view of the B-B section in it.

[0045] Figure 6 It is the axonometric sectional view of the valve body of the present invention.

[0046] Figure 7 It is the structural schematic diagram of the rotary seal assembly of the present invention.

[0047] Figure 8 It is the structural schematic diagram of the bracket of the present invention.

[0048] Figure 9 It is the structural schematic diagram of the inner support of the present invention.

[0049] Figure 10 It is the structural schematic diagram of the valve core of the present invention.

[0050] Wherein:

[0051] 1. Valve core; 11. First shaft section; 12. Second shaft section; 13. Third shaft section; 14. First channel; 141. First inlet; 15. Second channel; 151. Second inlet; 16. Jack; 17. Retaining ring;

[0052] 2. Valve body; 21. Valve body sealing surface; 22. First glue inlet hole; 23. Second glue inlet hole; 24. Lubricating hole; 25. First stop ring; 27. Softener storage tube;

[0053] 3. Rotary seal assembly;

[0054] 31. Seal ring group; 311. First seal ring; 312. Second seal ring; 313. Intermediate seal ring;

[0055] 32. Through hole group; 321. First through hole; 322. Second through hole;

[0056] 33. Support body;

[0057] 331. Bracket; 3311. Intermediate sealing surface; 3312. Second stop ring;

[0058] 332. Inner support; 3321. Support ring; 3322. Installation groove; 3323. Connection ring;

[0059] 41. First lubricating cavity; 42. First buffer cavity; 43. Second lubricating cavity; 44. Second buffer cavity; 45. Third lubricating cavity;

[0060] 5. Transmission connection structure; 51. Cover; 52. Second bearing; 53. Locking nut;

[0061] 6. First bearing;

[0062] 7. Driving mechanism; 71. End cover; 72. Transmission shaft;

[0063] 91. Glue supply pipeline; 92. Mixed glue outlet pipe; 93. Flat glue nozzle. Detailed implementation manners

[0064] The following combines with the attached drawings to illustrate the detailed implementation manners of the present invention.

[0065] Embodiment 1:

[0066] As Figures 1 - 3 shown, the rotary glue application valve of this embodiment includes a valve body 2, a valve core 1 and a rotary sealing assembly 3.

[0067] The valve body 2 is provided with a plurality of valve body sealing surfaces 21 whose diameters gradually decrease along the glue outlet direction;

[0068] The valve core 1 is provided with a first channel 14 for glue outlet at its axis. The diameter of the valve core 1 gradually increases along the glue outlet direction and includes a first shaft section 11 and a second shaft section 12;

[0069] The rotary sealing assembly 3 includes an annular support body 33 fixedly installed on the valve body 2 and a plurality of seal ring groups 31 corresponding to the valve body sealing surfaces 21 one by one. A seal ring group 31 includes a first seal ring 311 installed on the inner ring of the support body 33 and a second seal ring 312 installed on the outer ring of the support body 33 and sealingly connected to the valve body sealing surface 21;

[0070] Among them, after one first seal ring 311 in two adjacent seal ring groups 31 is sealingly connected to the first shaft section 11 and the other first seal ring 311 is sealingly connected to the second shaft section 12, a first buffer cavity 42 is formed. A first inlet 141 communicating with the first channel 14 is provided on the side wall of the first shaft section 11 corresponding to the first buffer cavity 42, and a first glue inlet hole 22 is provided on the valve body sealing surface 21 with a larger diameter corresponding to the first buffer cavity 42.

[0071] The glue outlet direction is as Figure 3 shown by the arrow in. In this embodiment, the number of the valve body sealing surfaces 21 is at least two. The first buffer cavity 42 serves as a buffer space for the glue and is connected to the external glue supply pipeline 91 through the first glue inlet hole 22. The glue in the first buffer cavity 42 enters the first channel 14 through the first inlet 141; the valve core 1 is shaft-shaped, the outlet of the first channel 14 is located at the end of the valve core 1, and the number of the first inlets 141 is multiple and is distributed in an annular array centered on the axis of the valve core 1.

[0072] A plurality of valve body sealing surfaces 21 are coaxially arranged and located at the center of the valve body 2. The diameters of each valve body sealing surface 21 are different, and an annular step structure is formed between adjacent valve body sealing surfaces 21; the first shaft section 11 and the second shaft section 12 are coaxially arranged, the diameter of the first shaft section 11 is smaller than that of the second shaft section 12, and an annular step structure is formed at the connection of the first shaft section 11 and the second shaft section 12.

[0073] The first buffer cavity 42 is located between the annular plugging structures corresponding to the two seal ring groups 31.

[0074] When assembling the rotary glue application valve:

[0075] All the seal ring groups 31 can be installed on the support 33, and then the support 33 installed with the seal ring groups 31 is integrally inserted into the center of the valve body 2. Since the diameters of each valve body sealing surface 21 are different, the second seal ring 312 in the seal ring group 31 only contacts and presses against the corresponding valve body sealing surface 21, reducing the installation difficulty while ensuring the sealing performance;

[0076] Since the first glue inlet hole 22 is located on the valve body sealing surface 21 with a larger diameter, the first glue inlet hole 22 will not contact the second seal ring 312 during the assembly process, avoiding damage to the second seal ring 312 and ensuring the sealing effect of the first buffer cavity 42;

[0077] After the support 33 and the seal ring group 31 are installed in the valve body 2, the valve core 1 is inserted into the center of the first seal ring 311 in the opposite direction of the glue outlet direction. One first seal ring 311 contacts and presses against the first shaft section 11, and the other first seal ring 311 contacts and presses against the second shaft section 12 to form the first buffer cavity 42, reducing the installation difficulty while ensuring the sealing performance;

[0078] Since the first inlet 141 is located on the first shaft section 11 with a smaller diameter, the first inlet 141 will not contact the first seal ring 311 during the assembly process, avoiding damage to the first seal ring 311 and ensuring the sealing effect of the first buffer cavity 42;

[0079] After the above assembly process is completed, axial limit is performed on the valve core 1 so that the valve core 1 is rotatably connected to the valve body 2 and is in transmission connection with the driving mechanism 7 at the same time.

[0080] When the rotary glue application valve is applied to the glue application equipment, a flat glue nozzle 93 for controlling the glue application width and thickness is installed at the end of the valve core 1, and the driving mechanism 7 drives the valve core 1 to rotate to change the direction of the flat glue nozzle 93 to make it adapt to the glue application direction.

[0081] In the prior art, two Gleason rings are installed between the valve core 1 and the valve body 2 to form an annular lubrication cavity therebetween. This structure usually requires the valve core 1 to be provided with grooves for installing the Gleason rings. When installing the Gleason rings, the rings need to be stretched and then sleeved on the valve core 1 and slid into the grooves. Therefore, there are certain elastic requirements for the Gleason rings, and their hardness and wear resistance are relatively poor. At the same time, it is very inconvenient to disassemble the Gleason rings.

[0082] In the prior art, when selecting Gleason rings, the installation convenience and sealing performance of the sealing structure are balanced, thereby sacrificing the sealing performance. The service life of the Gleason rings with this installation structure is relatively short. During the use of the rotary glue coating valve, the sealing rings need to be frequently replaced. In addition, the disassembly and assembly of the Gleason rings also increase the labor intensity of the operator.

[0083] The sealing method of this embodiment is a combined sealing. In the rotary sealing assembly 3, in addition to the support body 33 that plays a skeleton role, there are also two specific sealing positions, namely the second sealing ring 312 located on the outer ring and the first sealing ring 311 located on the inner ring. According to their different positions, targeted material selection can be carried out to improve the comprehensive sealing effect and service performance.

[0084] The seal between the valve body 2 and the valve core 1 of the rotary glue coating valve is set as a component structure, which is convenient for the optimized design and selection of the sealing material, as well as the overall disassembly and installation of the sealing structure. Step-shaped sealing surfaces are provided on both the valve body 2 and the valve core 1. Holes are opened near the root of the steps on the sealing surfaces, so that the sealing rings on the inner and outer circles will not be scratched during the installation of the sealing ring group 31, improving the sealing performance of the sealing structure, reducing the maintenance frequency, and improving the operation convenience.

[0085] In the structure of the rotary glue coating valve of this embodiment, the inner hole of the valve body 2 is integrally inverted conical, the outer wall of the valve core 1 is integrally positive conical, and between the valve body 2 and the valve core 1 are a sealing component and a first buffer cavity 42 for accommodating glue, which reduces the overall weight of the rotary glue coating valve.

[0086] Furthermore, the first sealing ring 311 is a rotary lip seal, and the second sealing ring 312 is an O-ring.

[0087] Select an O-ring with better elasticity as the second sealing ring 312 to achieve the seal between the support body 33 and the valve body 2, and fix the support body 33 relative to the valve body 2 through the elastic force;

[0088] Select a rotary lip seal as the first sealing ring 311 to achieve the rotary seal between the first sealing ring 311 and the valve core 1, strengthen the static sealing effect on the outer ring of the rotary sealing assembly 3, and strengthen the dynamic sealing effect on the inner ring of the rotary sealing assembly 3, improving the overall wear resistance and sealing performance of the rotary sealing assembly 3.

[0089] In the seal ring group 31 that forms the first buffer cavity 42, the opening of the lip of the rotating pantograph seal needs to face the inside of the first buffer cavity 42 to play a sealing role.

[0090] The rotating pantograph seal is a structure with a pressing flange. The pressing flange is made of the same non-metallic material as the seal. After the rotating pantograph seal is installed in the installation groove 3322, both sides of the pressing flange are pressed by the metal parts (support rings 3321) on both sides to prevent the seal from rotating, realizing the sealed and fixed connection between the rotating pantograph seal and the support body 33. The detachable support body 33 facilitates the installation of the rotating pantograph seal.

[0091] Embodiment 2:

[0092] Based on Embodiment 1, this embodiment further studies the implementation method of the specific structure of the internal cavity of the rotating seal assembly 3.

[0093] As Figures 3 - 9 shown, the support body 33 and a seal ring group 31 form an annular sealing structure in the cross-sectional direction of the seal ring group 31. A through-hole group 32 that connects the valve body sealing surface 21 and the side space of the valve core 1 is provided on the support body 33 between two adjacent seal ring groups 31.

[0094] In this embodiment, the cross-section refers to a section perpendicular to the axis of the valve core 1.

[0095] The through-hole group 32 is located on the support body 33 connecting two annular sealing structures, so that the space between the two annular sealing structures forms two or more interconnected annular cavities. The through-hole group 32 is a plurality of through-holes arranged in an annular array centered on the axis of the valve core 1.

[0096] Among them, the support body 33 can be an integral structure or a split structure, depending on whether it is convenient to install the first seal ring 311, especially when the number of seal ring groups 31 is large.

[0097] Furthermore, the support body 33 is a split structure. The support body 33 includes an annular bracket 331 and an inner support 332. A plurality of second seal rings 312 are installed on the outer wall of the bracket 331. A plurality of intermediate sealing surfaces 3311 with diameters gradually decreasing along the glue outlet direction are provided on the inner wall of the bracket 331. The intermediate sealing surfaces 3311 correspond to the valve body sealing surface 21 one by one. While there is an annular thinning structure on the outer wall of the bracket 331 between two adjacent intermediate sealing surfaces 3311, a plurality of first through-holes 321 are evenly opened;

[0098] The inner support 332 includes a plurality of support rings 3321 stacked inside the bracket 331. The outer ring of the support ring 3321 is provided with an intermediate sealing ring 313 that is sealingly connected to the intermediate sealing surface 3311. The inner and outer walls of the inner support 332 between two adjacent intermediate sealing rings 313 are both provided with an annular thinning structure, and a plurality of second through holes 322 are evenly opened. The second through holes 322 are staggered with the first through holes 321. The through hole group 32 includes the first through holes 321 and the second through holes 322 located in the same cross section.

[0099] An installation groove 3322 for installing the first sealing ring 311 is provided on the inner ring of the support ring 3321.

[0100] As Figures 7 - 9 shown, the annular thinning structure forms an annular cavity between the local position of the bracket 331 and the valve body sealing surface 21. The annular thinning structures at the inner and outer walls of the inner support 332 form an annular cavity between the local position of the inner support 332 and the bracket 331 and the valve core 1.

[0101] The structures of the support rings 3321 can be the same or different, which can be determined according to the number of the sealing ring groups 31. One set of sealing ring groups 31 can be installed on one support ring 3321, or one set of sealing ring groups 31 can be installed at both ends of one support ring 3321. An independent connecting ring 3323 can be provided at the middle part of the inner support 332. Only the second through holes 322 are provided on the connecting ring 3323, which serves to limit the distance between two adjacent sealing ring groups 31.

[0102] The intermediate sealing ring 313 is an O-ring.

[0103] The support body 33 includes the bracket 331 and a plurality of support rings 3321 stacked inside the bracket 331. The bracket 331 is a cup-shaped structure with a hollow bottom. A second stop ring 3312 is provided outside the intermediate sealing surface 3311 with the smallest diameter on the bracket 331, which is used to limit the installation position of the support ring 3321. The stacked support rings 3321 facilitate fixing the relative positions of the first sealing ring 311 and the second sealing ring 312 after individually installing each first sealing ring 311.

[0104] When assembling the rotary seal assembly 3:

[0105] Install the second sealing ring 312 on the outer wall of the bracket 331;

[0106] Install the intermediate sealing ring 313 on the outer ring of the support ring 3321, and install the first sealing ring 311 in the installation groove 3322 of the support ring 3321. When installing the first sealing ring 311, after adjusting the direction of the inner ring (lip structure) of the first sealing ring 311 (rotary lip seal), press the first sealing ring 311 into the installation groove 3322.

[0107] Stack the support rings 3321 in the bracket 331 so that the intermediate sealing ring 313 is sealingly connected to the intermediate sealing surface 3311;

[0108] Then install the bracket 331 in the valve body 2. A first stop ring 25 is provided outside the valve body sealing surface 21 with the smallest diameter in the valve body 2, which plays a role in positioning and limiting when installing the bracket 331.

[0109] The split support body 33 facilitates the overall disassembly of the rotary seal assembly 3 and also facilitates the installation and disassembly of multiple first sealing rings 311 and second sealing rings 312 outside the valve body 2.

[0110] Embodiment Three:

[0111] Based on Embodiment One and Embodiment Two, the number of the sealing ring group 31 in the rotary glue coating valve of this embodiment is greater than or equal to four.

[0112] As Figure 3 shown, after two first sealing rings 311 in four adjacent sealing ring groups 31 are sealingly connected to the first shaft section 11 and the other two first sealing rings 311 are sealingly connected to the second shaft section 12, a first lubricating cavity 41, a first buffer cavity 42 and a second lubricating cavity 43 are sequentially formed along the glue outlet direction. The first lubricating cavity 41 and the second lubricating cavity 43 are used to store softening agents;

[0113] Lubricating holes 24 are provided on the valve body sealing surfaces 21 with larger diameters corresponding to the first lubricating cavity 41 and the second lubricating cavity 43.

[0114] During the use of the Gleitring in the prior art, after the glue leaks, the glue is likely to solidify inside the valve body 2, causing the Gleitring to dry grind, shortening the service life and being prone to leakage.

[0115] Before the rotary glue coating valve of this embodiment is used, it is necessary to fill the first lubricating cavity 41 and the second lubricating cavity 43 with softening agents and fill the first buffer cavity 42 with glue; during the use process, the softening agent layer adds a liquid seal between the glue layer and the air, preventing the glue from curing after contacting the air, avoiding accelerating the damage of the sealing structure, and also playing a lubricating role, reducing the wear degree of the first sealing ring 311 and the valve core 1, and extending the service life of the first sealing ring 311.

[0116] It further includes a softening agent storage pipe 27 communicated with the lubricating hole 24, and the softening agent storage pipe 27 is made of a transparent material.

[0117] The first lubricating cavity 41 corresponds to a softener storage pipe 27, and the second lubricating cavity 43 corresponds to a softener storage pipe 27. The softener storage pipe 27 stores a softener and is used to provide the softener. At the same time, when glue leaks into the softener, the color change of the softener can be observed through the softener storage pipe 27, so as to understand the sealing performance of the internal sealing structure of the rotary coating valve.

[0118] Embodiment 4:

[0119] On the basis of Embodiment 1 and Embodiment 2, as Figure 3 shown, the valve core 1 in the rotary coating valve of this embodiment further includes a third shaft section 13 connected to the second shaft section 12 and having a diameter larger than that of the second shaft section 12. A plurality of second channels 15 axially consistent with the valve core 1 are evenly distributed around the first channel 14.

[0120] One first sealing ring 311 in another two adjacent sealing ring groups 31 is sealingly connected to the second shaft section 12, and the other first sealing ring 311 is sealingly connected to the third shaft section 13 to form a second buffer cavity 44. A plurality of second inlets 151 corresponding to and communicating with the second channels 15 are provided on the second shaft section 12 corresponding to the second buffer cavity 44, and a second glue inlet hole 23 is provided on the larger-diameter valve body sealing surface 21 corresponding to the second buffer cavity 44.

[0121] The number of the sealing ring groups 31 in this embodiment is greater than or equal to three.

[0122] The second channels 15 are distributed on the outer periphery of the first channel 14. The ends of the first channel 14 and the second channels 15 are both located at the end of the valve core 1. A mixing glue outlet pipe 92 is installed at the end of the valve core 1. When the glue in the second buffer cavity 44 and the first buffer cavity 42 is different, the first glue inlet hole 22 and the second glue inlet hole 23 are connected to different glue supply pipelines 91. After the glue is discharged from the valve core 1 and mixed in the mixing glue outlet pipe 92, it is discharged from the flat glue nozzle 93 at the end of the mixing glue outlet pipe 92.

[0123] The valve core 1 of the rotary coating valve in this embodiment is formed by three shaft sections with different diameters to form two stepped structures, so that the inlets of two different glues avoid the first sealing ring 311, improving the sealing performance of the sealing structure of the two-component rotary coating valve, reducing the maintenance frequency, and improving the operation convenience.

[0124] Since a through-hole group 32 that connects the valve body sealing surface 21 and the side space of the valve core 1 is provided on the support body 33 between two adjacent sealing ring groups 31, and the through-hole group 32 is a plurality of through-holes distributed circumferentially, the glue entering the second buffer cavity 44 from the second glue inlet hole 23 flows to the valve core 1 from the through-hole group 32 after being buffered and blocked by the support body 33, making the flow consistency of the glue entering different second inlets 151 better, and improving the uniformity and quality stability of the glue strip.

[0125] For the two - layer nested structure of the bracket 331 with a ring - shaped support 33 and the inner support 332, the second via - hole 322 and the first via - hole 321 are staggered with each other to achieve multiple - ring glue injection, making the glue injection flow rate and flow volume of multiple second inlets 151 more uniform.

[0126] In the seal ring group 31 that forms the second buffer cavity 44, the opening of the lip of the rotating lip seal needs to face the inside of the second buffer cavity 44 to play a sealing role.

[0127] Embodiment Five:

[0128] Based on Embodiment Four, in this embodiment, the number of the seal ring group 31 in the rotary coating valve is greater than or equal to six.

[0129] As Figure 3 shown, after each two second seal rings 312 in six adjacent seal ring groups 31 are respectively sealed and connected to the first shaft section 11, the second shaft section 12, and the third shaft section 13, a first lubricating cavity 41, a first buffer cavity 42, a second lubricating cavity 43, a second buffer cavity 44, and a third lubricating cavity 45 are sequentially formed along the glue - discharging direction. The first lubricating cavity 41, the second lubricating cavity 43, and the third lubricating cavity 45 are all used for storing softening agents;

[0130] Lubricating holes 24 are provided on the valve body sealing surfaces 21 with larger diameters corresponding to the first lubricating cavity 41, the second lubricating cavity 43, and the third lubricating cavity 45.

[0131] As Figure 3 shown, along the glue - discharging direction, there are three groups of seal ring groups 31, with two in each group. The second seal ring 312 of the first group is sealed and connected to the first shaft section 11, the second seal ring 312 of the second group is sealed and connected to the second shaft section 12, and the second seal ring 312 of the third group is sealed and connected to the third shaft section 13.

[0132] The upper end and the lower end of the valve core 1 are respectively rotatably connected to the valve body 2 through a first bearing 52 and a second bearing 6.

[0133] Embodiment Six:

[0134] In order to facilitate the fixation after the assembly of the rotary seal assembly 3 and the valve core 1 and the connection between the valve core 1 and the driving mechanism 7, this embodiment designs a direct - insertion connection structure.

[0135] Based on the above embodiments, as Figure 3 、 Figure 10 shown, this embodiment of the rotary coating valve further includes a driving mechanism 7 and a transmission connection structure 5;

[0136] A first stop ring 25 is arranged outside the valve body sealing surface 21 with the smallest diameter in the valve body 2, and a first bearing 6 is installed on the valve body 2 outside the first stop ring 25;

[0137] The transmission connection structure 5 includes a cover 51. The cover 51 is fixedly connected to the valve body 2, and the rotary seal assembly 3 is fixed between the first stop ring 25 and the cover 51. The minimum diameter end of the valve core 1 passes through the through hole of the cover 51, and a second bearing 52 is installed in the through hole. The inner rings of the first bearing 6 and the second bearing 52 are both fixedly connected to the valve core 1;

[0138] A jack 16 is provided at the center of the minimum diameter end. When the end cover 71 of the driving mechanism 7 is fixedly connected to the cover 51, the transmission shaft 72 of the driving mechanism 7 is inserted into the jack 16, and the transmission shaft 72 and the valve core 1 are drivingly connected in an inserted manner.

[0139] A specific driving mechanism 7, the driving mechanism 7 includes a motor, specifically a servo motor. The end cover 71 is the installation end of the reducer drivingly connected to the servo motor, the transmission shaft 72 is the rotating shaft of the reducer, and a keyway structure is provided at the insertion structure of the transmission shaft 72 and the jack 16.

[0140] The direct plug-in type transmission connection structure 5 closes the driving connection part between the transmission shaft 72 and the valve core 1 between the end cover 71 and the cover 51, reducing the overall size and weight of the rotary coating valve, facilitating the assembly of the driving mechanism 7 and the valve core 1, and also facilitating the disassembly and assembly of the rotary seal assembly 3.

[0141] Furthermore, a locking nut 53 is installed at the minimum diameter end. The locking nut 53 corresponds to the inner ring of the second bearing 52. A retaining ring 17 corresponding to the inner ring of the first bearing 6 is provided on the valve core 1. When the locking nut 53 is tightened, the locking nut 53 and the retaining ring 17 hold the valve core 1 from both ends of the valve core 1, so that the axial position of the valve core 1 relative to the valve body 2 is fixed.

[0142] The axial position of the valve core 1 is fixed by using the locking nut 53 and the retaining ring 17, making the installation and disassembly operations of the valve core 1 convenient.

[0143] The above description is an explanation of the present invention, not a limitation of the invention. The scope defined by the present invention is referred to the claims, and any form of modification can be made within the protection scope of the present invention.

Claims

1. A rotary coating valve, characterized in that: Comprising, A valve body (2) provided with a plurality of valve body sealing surfaces (21) whose diameters gradually decrease along the glue outlet direction; A valve core (1) with a first channel (14) for glue outlet provided at its axis. The diameter of the valve core (1) gradually increases along the glue outlet direction and includes a first shaft section (11) and a second shaft section (12); A rotary seal assembly (3) including an annular support body (33) fixedly installed on the valve body (2) and a plurality of seal ring groups (31) corresponding to the valve body sealing surfaces (21) one by one. A seal ring group (31) includes a first seal ring (311) installed in the inner ring of the support body (33) and a second seal ring (312) installed in the outer ring of the support body (33) and sealingly connected to the valve body sealing surface (21); Wherein, after one first seal ring (311) in two adjacent seal ring groups (31) is sealingly connected to the first shaft section (11) and the other first seal ring (311) is sealingly connected to the second shaft section (12), a first buffer cavity (42) is formed. A first inlet (141) communicating with the first channel (14) is provided on the side wall of the first shaft section (11) corresponding to the first buffer cavity (42), and a first glue inlet hole (22) is provided on the valve body sealing surface (21) with a larger diameter corresponding to the first buffer cavity (42).

2. The rotary coating valve according to claim 1, wherein: The first seal ring (311) is a rotary universal seal, and the second seal ring (312) is an O-ring.

3. The spin coating valve according to claim 1, characterized in that: The support body (33) and a seal ring group (31) form an annular sealing structure in the cross-sectional direction of the seal ring group (31). Through-hole groups (32) communicating the side space between the valve body sealing surface (21) and the valve core (1) are provided on the support body (33) between two adjacent seal ring groups (31).

4. The rotary coating valve according to claim 3, wherein: The support body (33) includes an annular bracket (331) and an inner support (332). A plurality of second seal rings (312) are installed on the outer wall of the bracket (331). The inner wall of the bracket (331) is provided with a plurality of intermediate sealing surfaces (3311) whose diameters gradually decrease along the glue outlet direction. The intermediate sealing surfaces (3311) correspond to the valve body sealing surfaces (21) one by one. While an annular thinning structure is provided on the outer wall of the bracket (331) between two adjacent intermediate sealing surfaces (3311), a plurality of first through-holes (321) are evenly opened; The inner support (332) includes a plurality of support rings (3321) stacked inside the bracket (331). An intermediate seal ring (313) sealingly connected to the intermediate sealing surface (3311) is provided on the outer ring of the support ring (3321). Annular thinning structures are provided on both the inner and outer walls of the inner support (332) between two adjacent intermediate seal rings (313), and a plurality of second through-holes (322) are evenly opened. The second through-holes (322) are staggered with the first through-holes (321). The through-hole group (32) includes the first through-holes (321) and the second through-holes (322) located in the same cross-section; An installation groove (3322) for installing the first seal ring (311) is provided on the inner ring of the support ring (3321).

5. The rotary coating valve according to claim 1, wherein: After two first sealing rings (311) in four groups of adjacent sealing ring groups (31) are sealingly connected to the first shaft section (11) and the other two first sealing rings (311) are sealingly connected to the second shaft section (12), a first lubricating cavity (41), the first buffer cavity (42) and a second lubricating cavity (43) are sequentially formed along the glue outlet direction. The first lubricating cavity (41) and the second lubricating cavity (43) are used for storing softening agent; Lubricating holes (24) are provided on the valve body sealing surfaces (21) with larger diameters corresponding to the first lubricating cavity (41) and the second lubricating cavity (43).

6. The spin coating valve according to claim 5, wherein: It further includes a softening agent storage pipe (27) communicated with the lubricating hole (24), and the softening agent storage pipe (27) is made of a transparent material.

7. The rotary spin coating valve according to claim 1, wherein: The valve core (1) further includes a third shaft section (13) connected to the second shaft section (12) and having a diameter larger than that of the second shaft section (12). A plurality of second channels (15) axially consistent with the valve core (1) are evenly distributed around the first channel (14). One of the first sealing rings (311) in another two adjacent sealing ring groups (31) is sealingly connected to the second shaft section (12), and the other first sealing ring (311) is sealingly connected to the third shaft section (13) to form a second buffer cavity (44). A plurality of second inlets (151) corresponding to and communicated with the second channels (15) are provided on the second shaft section (12) corresponding to the second buffer cavity (44). A second glue inlet hole (23) is provided on the valve body sealing surface (21) with a larger diameter corresponding to the second buffer cavity (44).

8. The rotary coating valve according to claim 7, characterized in that: After every two second sealing rings (312) in six groups of adjacent sealing ring groups (31) are respectively sealingly connected to the first shaft section (11), the second shaft section (12) and the third shaft section (13), a first lubricating cavity (41), the first buffer cavity (42) and a second lubricating cavity (43), the second buffer cavity (44), and a third lubricating cavity (45) are sequentially formed along the glue outlet direction. The first lubricating cavity (41), the second lubricating cavity (43) and the third lubricating cavity (45) are all used for storing softening agent; Lubricating holes (24) are provided on the valve body sealing surfaces (21) with larger diameters corresponding to the first lubricating cavity (41), the second lubricating cavity (43) and the third lubricating cavity (45).

9. The spin coating valve according to claim 1, wherein: It further includes a driving mechanism (7) and a transmission connection structure (5); A first stop ring (25) is arranged outside the valve body sealing surface (21) with the smallest diameter in the valve body (2), and a first bearing (6) is installed on the valve body (2) outside the first stop ring (25); The transmission connection structure (5) includes a cover (51). The cover (51) is fixedly connected to the valve body (2) to fix the rotary sealing assembly (3) between the first stop ring (25) and the cover (51). The smallest diameter end of the valve core (1) passes through the through hole of the cover (51), and a second bearing (52) is installed in the through hole. The inner rings of the first bearing (6) and the second bearing (52) are both fixedly connected to the valve core (1); A jack (16) is provided at the center of the minimum diameter end. When the end cover (71) of the driving mechanism (7) is fixedly connected to the sealing cover (51), the transmission shaft (72) of the driving mechanism (7) is inserted into the jack (16) to transmit - connect the transmission shaft (72) with the valve core (1).

10. A glue - applying device, characterized in that: It includes the rotary glue - coating valve according to any one of claims 1 - 9.

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