Rotary sealing assembly and rotary gluing valve

Abstract

A valve body is provided with a plurality of valve body sealing surfaces, the diameters of the valve body sealing surfaces are sequentially reduced in the glue outlet direction, the axis of a valve element is provided with a first channel used for glue outlet, the diameter of the valve element is sequentially increased in the glue outlet direction, and the valve element 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 hermetically connected with the first shaft section, and the other first sealing ring is hermetically connected with the second shaft section to form a first buffer cavity, and the side wall of the first shaft section corresponding to the first buffer cavity is provided with a first inlet communicated with the first channel; a first glue inlet hole is formed in the valve body sealing face with the large diameter corresponding to the first buffering cavity, the performance of the sealing structure is improved, the maintenance frequency is reduced, and operation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of automatic glue application technology, and in particular to a rotary sealing assembly and a rotary glue application valve. Background Technology

[0002] When using automatic glue dispensing equipment, to address the issue of adapting the flat glue nozzle structure to different glue dispensing directions, a rotary glue dispensing valve is typically used for direction adjustment. This valve, through a drive mechanism, rotates a shaft-shaped valve core, causing the flat glue nozzle mounted at the end to deflect circumferentially, thereby ensuring that the width direction of the glue nozzle is always perpendicular to the glue dispensing trajectory.

[0003] In the existing rotary glue dispensing valve structure, the valve body has a glue inlet, and the valve core is installed in the valve body through a sealing structure. The valve core and the inner cavity of the valve body form a glue storage chamber. The valve core has a glue channel connecting the glue storage chamber and the glue outlet. A glue nozzle is installed at the end of the glue channel. The valve core and the valve body mainly use a Glyd ring as a dynamic sealing element to form the glue storage chamber.

[0004] However, in practical applications, the sealing ring of this sealing structure is prone to wear and failure, resulting in glue leakage along the axial gap. This leads to problems such as short equipment maintenance cycles and frequent manual intervention, which seriously restricts the continuity and stability of the glue application process. Utility Model Content

[0005] To address the shortcomings of the existing production technology, the applicant provides a rotary sealing assembly and a rotary adhesive applicator valve, thereby improving the sealing performance of the sealing structure, reducing maintenance frequency, and increasing ease of operation.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A rotary sealing assembly for a rotary dispensing valve, wherein the valve body of the rotary dispensing valve is provided with a plurality of valve body sealing surfaces whose diameter decreases sequentially along the dispensing direction, and the valve core of the rotary dispensing valve is provided with a first channel for dispensing adhesive at its axis, and the diameter of the valve core increases sequentially along the dispensing direction and includes a first shaft section and a second shaft section.

[0008] The rotary sealing assembly includes an annular support fixedly installed on the valve body and multiple sealing ring groups corresponding to the valve body sealing surfaces. Each sealing ring group includes a first sealing ring installed in the inner annular ring of the support and a second sealing ring installed in the outer annular ring of the support and sealed to the valve body sealing surfaces.

[0009] In this configuration, one of the two adjacent sealing ring groups is sealed to the first shaft segment, and the other first sealing ring is sealed to the second shaft segment to form a first buffer cavity. The side wall of the first shaft segment corresponding to the first buffer cavity is provided with a first inlet communicating with the first channel, and the valve body sealing surface with a larger diameter corresponding to the first buffer cavity is provided with a first glue inlet hole.

[0010] As a further improvement to the above technical solution:

[0011] The first sealing ring is a rotary plug seal, and the second sealing ring is an O-ring.

[0012] The support body and a sealing ring group form an annular sealing structure in the cross-sectional direction of the sealing ring group. The support body between two adjacent sealing ring groups is provided with a through hole group that connects the valve body sealing surface and the side space of the valve core. The through hole group consists of multiple through holes arranged in an annular array with the axis of the valve core as the center.

[0013] The support body includes an annular bracket and an inner support. Multiple second sealing rings are installed on the outer wall of the bracket. The inner wall of the bracket is provided with multiple intermediate sealing surfaces whose diameter decreases sequentially along the dispensing direction. The intermediate sealing surfaces correspond one-to-one with the valve body sealing surfaces. The outer wall of the bracket between two adjacent intermediate sealing surfaces is provided with an annular thinning structure and multiple first through holes are uniformly opened.

[0014] The inner support includes multiple support rings stacked inside the bracket. The outer ring of the support ring is provided with an intermediate sealing ring that is sealed and connected to the intermediate sealing surface. The inner and outer walls of the inner support between two adjacent intermediate sealing rings are provided with annular thinning structures and multiple second through holes are evenly opened. The second through holes and the first through holes are staggered. The through hole group includes first through holes and second through holes located in the same cross section.

[0015] The inner ring of the support ring is provided with a mounting groove for installing the first sealing ring.

[0016] Two of the four adjacent sealing ring groups are sealed to the first shaft segment, and the other two first sealing rings are sealed to the second shaft segment. Then, along the glue discharge direction, the first lubrication cavity, the first buffer cavity, and the second lubrication cavity are formed in sequence. The first lubrication cavity and the second lubrication cavity are used to store softener.

[0017] Lubrication holes are provided on the valve body sealing surfaces with larger diameters corresponding to the first and second lubrication chambers.

[0018] The valve core also includes a third shaft segment connected to the second shaft segment and having a diameter larger than the second shaft segment. Multiple second channels, aligned with the axial direction of the valve core, are evenly distributed around the outer side of the first channel.

[0019] One of the two adjacent sealing ring groups is sealed to the second shaft segment, and the other first sealing ring is sealed to the third shaft segment to form a second buffer cavity. The second shaft segment corresponding to the second buffer cavity is provided with multiple second inlets that correspond one-to-one with and are connected to the second channel. The valve body sealing surface with a larger diameter corresponding to the second buffer cavity is provided with a second glue inlet hole.

[0020] After each pair of second sealing rings in the six adjacent sealing ring groups are sealed and connected to the first shaft segment, the second shaft segment and the third shaft segment respectively, a first lubrication cavity, a first buffer cavity and a second lubrication cavity, a second buffer cavity and a third lubrication cavity are formed in sequence along the glue discharge direction. The first lubrication cavity, the second lubrication cavity and the third lubrication cavity are all used to store softener.

[0021] The valve body sealing surfaces with larger diameters corresponding to the first, second, and third lubrication chambers are all provided with lubrication holes.

[0022] A rotary adhesive applicator valve includes any of the rotary sealing assemblies described above.

[0023] As a further improvement to the above technical solution:

[0024] It also includes the drive mechanism and transmission connection structure;

[0025] A first stop ring is provided on the outer side of the valve body sealing surface with the smallest diameter inside the valve body, and a first bearing is installed on the valve body outside the first stop ring.

[0026] The transmission connection structure includes a cover, which is fixedly connected to the valve body. 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. 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.

[0027] When the end cap of the drive mechanism is fixedly connected to the sealing cap, the drive shaft is connected to the minimum diameter end of the valve core by insertion.

[0028] A locking nut is installed at the smallest diameter end, and the locking nut corresponds to the inner ring of the second bearing. A retaining ring corresponding to the inner ring of the first bearing is provided on the valve core. When the locking nut is tightened, the locking nut and the retaining ring push the valve core from both ends of the valve core, so that the axial position of the valve core relative to the valve body is fixed.

[0029] The beneficial effects of this utility model are as follows:

[0030] This utility model features a compact and reasonable structure, and is easy to operate. The seal between the valve body and valve core of the rotary adhesive valve is set as a component structure, which facilitates the optimized design and selection of sealing materials, as well as the overall disassembly and installation of the sealing structure. Both the valve body and valve core are provided with stepped sealing surfaces, and holes are opened near the root of the steps on the sealing surfaces. This prevents the inner and outer sealing rings from being scratched during the installation of the sealing ring assembly, thereby improving the sealing performance of the sealing structure, reducing the maintenance frequency, and improving the ease of operation.

[0031] This utility model also has the following advantages:

[0032] (1) The inner hole of the valve body of the rotary glue applicator is generally inverted cone shape, and the outer wall of the valve core is generally positive cone shape. Between the valve body and the valve core are sealing components, a buffer chamber for containing glue, a lubricating chamber for containing softener, and a through hole assembly, which reduces the overall weight of the rotary glue applicator.

[0033] (2) Select a rotary seal as the first sealing ring to achieve rotary sealing between the first sealing ring and the valve core. Strengthen the static sealing effect on the outer ring of the rotary sealing assembly and strengthen the dynamic sealing effect on the inner ring of the rotary sealing assembly to improve the overall wear resistance and sealing performance of the rotary sealing assembly.

[0034] (3) The split structure of the support body facilitates the overall disassembly of the rotary sealing assembly, and also facilitates the installation and disassembly of multiple first and second sealing rings on the outside of the valve body.

[0035] (4) The valve core adopts three shaft segments of different diameters to form two stepped structures, so that the inlets of the two different adhesives can avoid the first sealing ring, thereby improving the sealing performance of the two-component rotary adhesive valve sealing structure, reducing maintenance frequency, and improving operation convenience.

[0036] (5) Since the support body between two adjacent sealing ring groups is provided with a through hole group that connects the valve body sealing surface and the side space of the valve core, the through hole group consists of multiple through holes distributed along the circumferential direction. The glue entering the second buffer chamber from the second glue inlet flows to the valve core through the through hole group after being buffered and blocked by the support body, which makes the flow rate of glue entering different second inlets more consistent and improves the uniformity and quality stability of the glue strip.

[0037] (6) For a bracket with an annular support and a two-layer nested structure with an inner support, the second through hole and the first through hole are intertwined to achieve multiple annular glue inlet, making the glue inlet flow rate and flow rate of multiple second inlets more uniform.

[0038] (7) The direct insertion transmission connection structure encloses the transmission shaft and valve core transmission connection between the end cover and the cover, reducing the overall size and weight of the rotary adhesive valve, facilitating the assembly of the drive mechanism and the valve core, and also facilitating the disassembly and assembly of the rotary sealing assembly. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of the rotary coating equipment of this utility model.

[0040] Figure 2 This is a schematic diagram of the rotary adhesive valve of this utility model.

[0041] Figure 3 This is a partial cross-sectional view of the rotary adhesive applicator valve of this utility model.

[0042] Figure 4 for Figure 3 A sectional view of section AA in the middle.

[0043] Figure 5 for Figure 3 Sectional view of section BB.

[0044] Figure 6 This is an axial sectional view of the valve body of this utility model.

[0045] Figure 7 This is a schematic diagram of the structure of the rotary sealing assembly of this utility model.

[0046] Figure 8 This is a schematic diagram of the structure of the bracket of this utility model.

[0047] Figure 9 This is a schematic diagram of the internal support structure of this utility model.

[0048] Figure 10 This is a schematic diagram of the valve core of this utility model.

[0049] in:

[0050] 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. Insertion hole; 17. Retaining ring;

[0051] 2. Valve body; 21. Valve body sealing surface; 22. First glue inlet hole; 23. Second glue inlet hole; 24. Lubrication hole; 25. First stop ring; 27. Softener storage tube;

[0052] 3. Rotary sealing assembly;

[0053] 31. Sealing ring assembly; 311. First sealing ring; 312. Second sealing ring; 313. Intermediate sealing ring;

[0054] 32. Via group; 321. First via; 322. Second via;

[0055] 33. Support structure;

[0056] 331, bracket; 3311, intermediate sealing surface; 3312, second stop ring;

[0057] 332, Inner support; 3321, Support ring; 3322, Mounting groove; 3323, Connecting ring;

[0058] 41. First lubrication chamber; 42. First buffer chamber; 43. Second lubrication chamber; 44. Second buffer chamber; 45. Third lubrication chamber;

[0059] 5. Transmission connection structure; 51. Cover; 52. Second bearing; 53. Locking nut;

[0060] 6. First bearing;

[0061] 7. Drive mechanism; 71. End cover; 72. Drive shaft;

[0062] 91. Adhesive supply line; 92. Mixing and dispensing line; 93. Flat nozzle. Detailed Implementation

[0063] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0064] Example 1:

[0065] like Figures 1-3 As shown, the rotary sealing assembly of this embodiment is used for a rotary glue dispensing valve. The valve body 2 of the rotary glue dispensing valve is provided with a plurality of valve body sealing surfaces 21 whose diameter decreases sequentially along the glue dispensing direction. The valve core 1 of the rotary glue dispensing valve has a first channel 14 for dispensing glue at its axis. The diameter of the valve core 1 increases sequentially along the glue dispensing direction and includes a first shaft section 11 and a second shaft section 12.

[0066] The rotary sealing assembly 3 includes an annular support 33 fixedly installed on the valve body 2 and a plurality of sealing ring groups 31 corresponding to the valve body sealing surface 21. Each sealing ring group 31 includes a first sealing ring 311 installed on the inner ring of the support 33 and a second sealing ring 312 installed on the outer ring of the support 33 and sealed to the valve body sealing surface 21.

[0067] In this arrangement, one of the two adjacent sealing ring groups 31 is sealed to the first shaft segment 11, and the other first sealing ring 311 is sealed to the second shaft segment 12, forming a first buffer cavity 42. The side wall of the first shaft segment 11 corresponding to the first buffer cavity 42 is provided with a first inlet 141 that communicates with the first channel 14. The valve body sealing surface 21 with a larger diameter corresponding to the first buffer cavity 42 is provided with a first glue inlet hole 22.

[0068] Glue discharge direction as follows Figure 3As shown by the middle arrow, in this embodiment, the number of valve body sealing surfaces 21 is at least two. The first buffer chamber 42 serves as a buffer space for the glue and is connected to the external glue supply pipeline 91 through the first glue inlet 22. The glue in the first buffer chamber 42 enters the first channel 14 through the first inlet 141. The valve core 1 is shaft-shaped, and the outlet of the first channel 14 is located at the end of the valve core 1. There are multiple first inlets 141, which are arranged in a ring array with the axis of the valve core 1 as the center.

[0069] Multiple valve body sealing surfaces 21 are coaxially arranged and located at the center of the valve body 2. Each valve body sealing surface 21 has a different diameter, and an annular step structure is formed between adjacent valve body sealing surfaces 21. The first shaft segment 11 and the second shaft segment 12 are coaxially arranged. The diameter of the first shaft segment 11 is smaller than the diameter of the second shaft segment 12, and an annular step structure is formed at the connection between the first shaft segment 11 and the second shaft segment 12.

[0070] The first buffer chamber 42 is located between the annular sealing structures corresponding to the two sealing ring groups 31.

[0071] When assembling the rotary glue applicator:

[0072] All the sealing ring groups 31 can be installed on the support body 33, and then the support body 33 with the sealing ring groups 31 installed can be inserted into the center of the valve body 2. Since the diameter of each valve body sealing surface 21 is different, the second sealing ring 312 in the sealing ring group 31 only contacts and squeezes the corresponding valve body sealing surface 21, which reduces the installation difficulty while ensuring the sealing performance.

[0073] Since the first glue inlet 22 is located on the valve body sealing surface 21 with a larger diameter, the first glue inlet 22 will not come into contact with the second sealing ring 312 during the assembly process, thus avoiding damage to the second sealing ring 312 and ensuring the sealing effect of the first buffer chamber 42.

[0074] After the support body 33 and the sealing ring group 31 are installed in the valve body 2, the valve core 1 is inserted into the center of the first sealing ring 311 in the opposite direction of the dispensing direction. One first sealing ring 311 contacts and is pressed with the first shaft section 11, and the other first sealing ring 311 contacts and is pressed with the second shaft section 12 to form the first buffer cavity 42, which reduces the installation difficulty while ensuring the sealing performance.

[0075] Since the first inlet 141 is located on the first shaft segment 11 with a smaller diameter, the first inlet 141 will not come into contact with the first sealing ring 311 during the assembly process, thus avoiding damage to the first sealing ring 311 and ensuring the sealing effect of the first buffer cavity 42.

[0076] After the above assembly process is completed, the valve core 1 is axially limited so that the valve core 1 is rotatably connected to the valve body 2 and simultaneously connected to the drive mechanism 7.

[0077] When the rotary dispensing valve is applied to the dispensing equipment, a flat nozzle 93 for controlling the width and thickness of the dispensing is installed at the end of the valve core 1. The drive mechanism 7 drives the valve core 1 to rotate, changing the direction of the flat nozzle 93 so that it is adapted to the dispensing direction.

[0078] In existing technology, two Glyd rings are installed between the valve core 1 and the valve body 2, forming an annular lubrication cavity between them. This structure typically requires a groove on the valve core 1 for installing the Glyd rings. When installing the Glyd rings, they need to be enlarged, fitted onto the valve core 1, and then slid into the groove. Therefore, the Glyd rings require a certain degree of elasticity, and their hardness and wear resistance are relatively poor. Furthermore, removing the Glyd rings is quite inconvenient.

[0079] In existing technologies, the selection of Glyd rings balances the ease of installation and sealing performance of the sealing structure, thereby sacrificing sealing performance. Glyd rings with this installation structure have a shorter lifespan, requiring frequent replacement of the sealing ring during the use of rotary adhesive valves. Furthermore, the disassembly and assembly of the Glyd ring increases the workload for operators.

[0080] The sealing method in this embodiment is a combined sealing method. In addition to the support body 33 that acts as a skeleton, the rotary sealing assembly 3 also includes 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. The materials can be selected according to the different positions of the two to improve the overall sealing effect and performance.

[0081] The seal between the valve body 2 and the valve core 1 of the rotary adhesive applicator is set as a component structure, which facilitates the optimized design and selection of sealing materials, as well as the overall disassembly and installation of the sealing structure. Both the valve body 2 and the valve core 1 are provided with stepped sealing surfaces, and holes are opened near the root of the steps on the sealing surfaces, so that the inner and outer sealing rings will not be scratched when the sealing ring assembly 31 is installed, thereby improving the sealing performance of the sealing structure, reducing the frequency of maintenance, and improving the convenience of operation.

[0082] In the assembly structure of the rotary sealing assembly in this embodiment, the inner hole of the valve body 2 of the rotary glue applicator is generally inverted conical, and the outer wall of the valve core 1 is generally conical. The valve body 2 and the valve core 1 are a sealing component assembly and a first buffer chamber 42 for containing glue, which reduces the overall weight of the rotary glue applicator.

[0083] Furthermore, the first sealing ring 311 is a rotary plug seal, and the second sealing ring 312 is an O-ring.

[0084] Select an O-ring with better elasticity as the second sealing ring 312 to achieve a seal between the support body 33 and the valve body 2, and fix the support body 33 relative to the valve body 2 through elastic force.

[0085] A rotary sealing ring 311 is selected as the first sealing ring 311 to achieve rotary sealing between the first sealing ring 311 and the valve core 1. The static sealing effect is enhanced on the outer ring of the rotary sealing assembly 3, and the dynamic sealing effect is enhanced on the inner ring of the rotary sealing assembly 3, thereby improving the overall wear resistance and sealing performance of the rotary sealing assembly 3.

[0086] In the sealing ring assembly 31 that forms the first buffer cavity 42, the opening of the lip of the rotating plug seal must face into the first buffer cavity 42 to achieve a sealing effect.

[0087] The rotary plug seal has a structure with a clamping flange. The clamping flange and the sealing element are made of the same non-metallic material. After the rotary plug seal is installed into the mounting groove 3322, the two sides of the clamping flange are pressed by the metal parts (support rings 3321) on both sides to prevent the sealing element from rotating, thereby achieving a sealed and fixed connection between the rotary plug seal and the support body 33. The detachable support body 33 facilitates the installation of the rotary plug seal.

[0088] Example 2:

[0089] Based on Embodiment 1, this embodiment further studies the implementation method of the specific structure of the internal cavity of the rotary sealing assembly 3.

[0090] like Figures 3-9 As shown, the support body 33 and a sealing ring group 31 form an annular sealing structure in the cross-sectional direction of the sealing ring group 31. The support body 33 between two adjacent sealing ring groups 31 is provided with a through hole group 32 that connects the valve body sealing surface 21 and the side space of the valve core 1. The through hole group 32 consists of multiple through holes arranged in an annular array with the axis of the valve core 1 as the center.

[0091] In this embodiment, the cross section refers to the section perpendicular to the axis of valve core 1.

[0092] The via assembly 32 is located on the support 33 connecting the two annular sealing structures, so that the space between the two annular sealing structures forms two or more interconnected annular cavities.

[0093] The support 33 can be an integral structure or a split structure. The difference lies in whether it is convenient to install the first sealing ring 311, especially when there are many sealing ring groups 31.

[0094] Furthermore, the support body 33 is a split structure, including an annular bracket 331 and an inner support 332. Multiple second sealing rings 312 are installed on the outer wall of the bracket 331. Multiple intermediate sealing surfaces 3311 with diameters decreasing sequentially along the dispensing direction are provided on the inner wall of the bracket 331. The intermediate sealing surfaces 3311 correspond one-to-one with the valve body sealing surfaces 21. The outer wall of the bracket 331 between two adjacent intermediate sealing surfaces 3311 is provided with an annular thinning structure and multiple first through holes 321 are uniformly opened.

[0095] The inner support 332 includes multiple 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 sealed and 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 provided with annular thinning structures and multiple second through holes 322 are evenly opened. The second through holes 322 and the first through holes 321 are interleaved. The through hole group 32 includes the first through hole 321 and the second through hole 322 located in the same cross section.

[0096] The inner ring of the support ring 3321 is provided with a mounting groove 3322 for installing the first sealing ring 311.

[0097] like Figures 7-9 As shown, the annular thinning structure forms an annular cavity between a local position of the bracket 331 and the valve body sealing surface 21. The annular thinning structure located on the inner and outer walls of the inner support 332 forms an annular cavity between a local position of the inner support 332 and the bracket 331 and the valve core 1.

[0098] The structure of the support ring 3321 can be the same or different, depending on the number of sealing ring groups 31. A set of sealing ring groups 31 can be installed on one support ring 3321, or a set of sealing ring groups 31 can be installed at each end of one support ring 3321. An independent connecting ring 3323 can be set in the middle part of the inner support 332. The connecting ring 3323 is only provided with a second through hole 322, which serves to limit the distance between two adjacent sealing ring groups 31.

[0099] The intermediate sealing ring 313 is an O-ring.

[0100] The support body 33 includes a bracket 331 and a plurality of stacked support rings 3321 disposed within the bracket 331. The bracket 331 is a cup-shaped structure with a hollow bottom. A second stop ring 3312 is provided on the outer side of the smallest diameter middle sealing surface 3311 on the bracket 331 to limit the installation position of the support rings 3321. The stacked support rings 3321 facilitate the individual installation of each first sealing ring 311 and then fixing the relative position of the first sealing ring 311 to the second sealing ring 312.

[0101] When assembling rotary seal assembly 3:

[0102] A second sealing ring 312 is installed on the outer wall of the bracket 331;

[0103] An intermediate sealing ring 313 is installed on the outer ring of the support ring 3321, and a first sealing ring 311 is installed in the mounting 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 plug seal), the first sealing ring 311 is pressed into the mounting groove 3322.

[0104] The support rings 3321 are stacked inside the bracket 331 so that the intermediate sealing ring 313 is sealed to the intermediate sealing surface 3311.

[0105] Then the bracket 331 is installed inside the valve body 2. The valve body sealing surface 21 with the smallest diameter inside the valve body 2 is provided with a first stop ring 25, which plays a positioning and limiting role when installing the bracket 331.

[0106] The split-structure support 33 facilitates the overall disassembly of the rotary sealing assembly 3, while also facilitating the installation and removal of multiple first sealing rings 311 and second sealing rings 312 on the outside of the valve body 2.

[0107] Example 3:

[0108] Based on Embodiment 1 and Embodiment 2, the number of sealing ring groups 31 in the rotary sealing assembly of this embodiment is greater than or equal to four.

[0109] like Figure 3 As shown, two first sealing rings 311 in the four adjacent sealing ring groups 31 are sealed to the first shaft segment 11, and the other two first sealing rings 311 are sealed to the second shaft segment 12. Then, a first lubrication cavity 41, a first buffer cavity 42 and a second lubrication cavity 43 are formed in sequence along the glue discharge direction. The first lubrication cavity 41 and the second lubrication cavity 43 are used to store softener.

[0110] Lubrication holes 24 are provided on the valve body sealing surfaces 21 with larger diameters corresponding to the first lubrication chamber 41 and the second lubrication chamber 43.

[0111] In the existing technology, when the glue leaks during use, it tends to solidify inside the valve body 2, causing the glyd ring to dry-grind, shortening its service life, and making it prone to leakage.

[0112] Before use, the rotary adhesive valve needs to be filled with softener in the first lubrication chamber 41 and the second lubrication chamber 43, and with adhesive in the first buffer chamber 42. During use, the softener layer adds a liquid seal between the adhesive layer and the air, preventing the adhesive from curing after contact with the air, avoiding accelerated damage to the sealing structure, and also playing a lubricating role, reducing the wear of the first sealing ring 311 and the valve core 1, and extending the service life of the first sealing ring 311.

[0113] It also includes a softener storage tube 27 that communicates with the lubrication hole 24, and the softener storage tube 27 is made of transparent material.

[0114] The first lubrication chamber 41 corresponds to a softener storage tube 27, and the second lubrication chamber 43 corresponds to a softener storage tube 27. The softener storage tube 27 stores softener and is used to supply softener. At the same time, when glue leaks into the softener, the color change of the softener can be observed through the softener storage tube 27, thereby understanding the sealing performance of the internal sealing structure of the rotary glue applicator.

[0115] Example 4:

[0116] Based on Embodiment 1 and Embodiment 2, as follows Figure 3 As shown, in this embodiment of the rotary sealing assembly, the valve core 1 further includes a third shaft segment 13 connected to the second shaft segment 12 and having a diameter larger than the second shaft segment 12. Multiple second channels 15, aligned with the axial direction of the valve core 1, are evenly distributed around the first channel 14.

[0117] One of the two adjacent sealing ring groups 31 is a first sealing ring 311 that is sealed to the second shaft segment 12, and the other first sealing ring 311 is sealed to the third shaft segment 13 to form a second buffer cavity 44. The second shaft segment 12 corresponding to the second buffer cavity 44 is provided with a plurality of second inlets 151 that correspond one-to-one with and communicate with the second channel 15. The valve body sealing surface 21 with a larger diameter corresponding to the second buffer cavity 44 is provided with a second glue inlet hole 23.

[0118] In this embodiment, the number of sealing ring assemblies 31 is greater than or equal to three.

[0119] The second channel 15 is distributed around the outer periphery of the first channel 14. The ends of the first channel 14 and the second channel 15 are both located at the end of the valve core 1. The end of the valve core 1 is equipped with a mixing dispensing tube 92. When the glue in the second buffer chamber 44 and the first buffer chamber 42 are different, the first glue inlet hole 22 and the second glue inlet hole 23 are connected to different glue supply pipes 91. After the glue is discharged from the valve core 1, it is mixed in the mixing dispensing tube 92 and then discharged from the flat nozzle 93 at the end of the mixing dispensing tube 92.

[0120] In this embodiment, the valve core 1 adopts three shaft segments of different diameters to form two stepped structures, so that the inlets of the two different adhesives can avoid the first sealing ring 311, thereby improving the sealing performance of the two-component rotary adhesive valve sealing structure, reducing maintenance frequency, and improving operation convenience.

[0121] Because the support 33 between two adjacent sealing ring groups 31 is provided with a through hole group 32 that connects the valve body sealing surface 21 and the side space of the valve core 1, the through hole group 32 consists of multiple through holes distributed along the circumferential direction. The glue entering the second buffer chamber 44 from the second glue inlet 23 flows to the valve core 1 through the through hole group 32 after being buffered and blocked by the support 33. This makes the flow rate of glue entering different second inlets 151 more consistent, and improves the uniformity and quality stability of the glue strip.

[0122] For the support body 33, which is a two-layer nested structure of an annular bracket 331 and an inner support 332, the second through hole 322 and the first through hole 321 are intertwined to achieve multiple annular glue inlets, making the glue inlet flow rate and flow rate of multiple second inlets 151 more uniform.

[0123] In the sealing ring assembly 31 that forms the second buffer cavity 44, the opening of the lip of the rotating plug seal must face into the second buffer cavity 44 to achieve a sealing effect.

[0124] Example 5:

[0125] Based on Embodiment 4, the number of sealing ring groups 31 in the rotary sealing assembly of this embodiment is greater than or equal to six.

[0126] like Figure 3 As shown, after each pair of second sealing rings 312 in the six adjacent sealing ring groups 31 are sealed and connected to the first shaft segment 11, the second shaft segment 12 and the third shaft segment 13 respectively, a first lubrication cavity 41, a first buffer cavity 42 and a second lubrication cavity 43, a second buffer cavity 44 and a third lubrication cavity 45 are formed in sequence along the glue discharge direction. The first lubrication cavity 41, the second lubrication cavity 43 and the third lubrication cavity 45 are all used to store softener.

[0127] The valve body sealing surfaces 21 with larger diameters corresponding to the first lubrication chamber 41, the second lubrication chamber 43, and the third lubrication chamber 45 are all provided with lubrication holes 24.

[0128] like Figure 3 As shown, there are three sets of sealing rings 31 along the glue discharge direction. Each set of sealing rings 31 consists of two rings. The second sealing ring 312 of the first set is sealed to the first shaft segment 11. The second sealing ring 312 of the second set is sealed to the second shaft segment 12. The second sealing ring 312 of the third set is sealed to the third shaft segment 13.

[0129] The upper and lower ends of the valve core 1 are rotatably connected to the valve body 2 via the first bearing 52 and the second bearing 6, respectively.

[0130] Example 6:

[0131] The rotary adhesive valve of this embodiment includes the rotary sealing assembly described in any of the above embodiments.

[0132] Example 7:

[0133] Based on Embodiment Six, in order to facilitate the fixing of the rotary sealing assembly 3 and the valve core 1 after assembly, as well as the connection between the valve core 1 and the drive mechanism 7, this embodiment designs a direct-insertion connection structure.

[0134] like Figure 3 , Figure 10 As shown, the rotary glue applicator valve in this embodiment also includes a drive mechanism 7 and a transmission connection structure 5;

[0135] A first stop ring 25 is provided on the outer side of the valve body sealing surface 21 with the smallest diameter inside the valve body 2, and a first bearing 6 is installed on the valve body 2 outside the first stop ring 25.

[0136] The transmission connection structure 5 includes a cover 51, which is fixedly connected to the valve body 2. The rotary sealing 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. A second bearing 52 is installed in the through hole. The inner ring of the first bearing 6 and the inner ring of the second bearing 52 are both fixedly connected to the valve core 1.

[0137] When the end cap 71 of the drive mechanism 7 is fixedly connected to the cover 51, the drive shaft 72 is connected to the minimum diameter end of the valve core 1 by insertion.

[0138] A specific drive mechanism 7 includes a motor, specifically a servo motor, an end cover 71 which is the mounting end of a reducer that is connected to the servo motor, and a drive shaft 72 which is the rotating shaft of the reducer.

[0139] The valve core 1 has a socket 16 at the center of its smallest diameter end. When the end cover 71 of the drive mechanism 7 is fixedly connected to the cover 51, the drive shaft 72 of the drive mechanism 7 is inserted into the socket 16, and the drive shaft 72 and the valve core 1 are connected by insertion. A keyway structure is provided at the insertion structure between the drive shaft 72 and the socket 16.

[0140] The direct-insertion transmission connection structure 5 encloses the transmission connection between the transmission shaft 72 and the valve core 1 between the end cover 71 and the sealing cover 51, reducing the overall size and weight of the small rotary adhesive valve, facilitating the assembly of the drive mechanism 7 and the valve core 1, and also facilitating the disassembly and assembly of the rotary sealing assembly 3.

[0141] Furthermore, a locking nut 53 is installed at the smallest diameter end, which 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 locked, the locking nut 53 and the retaining ring 17 push the valve core 1 from both ends, 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 a locking nut 53 and a retaining ring 17, which makes the installation and disassembly of the valve core 1 convenient.

[0143] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A rotary sealing assembly, characterized in that: For use in rotary glue dispensing valve, the valve body (2) of the rotary glue dispensing valve is provided with a plurality of valve body sealing surfaces (21) whose diameter decreases sequentially along the glue dispensing direction, and the valve core (1) of the rotary glue dispensing valve is provided with a first channel (14) for glue dispensing at the center of the axis, and the diameter of the valve core (1) increases sequentially along the glue dispensing direction and includes a first shaft section (11) and a second shaft section (12). The rotary sealing assembly (3) includes an annular support (33) fixedly installed on the valve body (2) and a plurality of sealing ring groups (31) corresponding one-to-one with the valve body sealing surface (21). A sealing ring group (31) includes a first sealing ring (311) installed on the inner ring of the support (33) and a second sealing ring (312) installed on the outer ring of the support (33) and sealed to the valve body sealing surface (21). Among them, one of the two adjacent sealing ring groups (31) is sealed to the first shaft segment (11), and the other first sealing ring (311) is sealed to the second shaft segment (12) to form a first buffer cavity (42). The side wall of the first shaft segment (11) corresponding to the first buffer cavity (42) is provided with a first inlet (141) communicating with the first channel (14). The valve body sealing surface (21) with a larger diameter corresponding to the first buffer cavity (42) is provided with a first glue inlet hole (22).

2. The rotary sealing assembly as described in claim 1, characterized in that: The first sealing ring (311) is a rotary plug seal, and the second sealing ring (312) is an O-ring.

3. The rotary sealing assembly as described in claim 1, characterized in that: The support (33) and a sealing ring group (31) form an annular sealing structure in the cross-sectional direction of the sealing ring group (31). The support (33) between two adjacent sealing ring groups (31) is provided with a through hole group (32) that connects the valve body sealing surface (21) and the side space of the valve core (1). The through hole group (32) consists of multiple through holes arranged in an annular array with the axis of the valve core (1) as the center.

4. The rotary sealing assembly as described in claim 3, characterized in that: The support (33) includes an annular bracket (331) and an inner support (332). Multiple second sealing rings (312) are installed on the outer wall of the bracket (331). The inner wall of the bracket (331) is provided with multiple intermediate sealing surfaces (3311) whose diameter decreases sequentially along the dispensing direction. The intermediate sealing surfaces (3311) correspond one-to-one with the valve body sealing surfaces (21). The outer wall of the bracket (331) between two adjacent intermediate sealing surfaces (3311) is provided with an annular thinning structure and multiple first through holes (321) are uniformly opened. The inner support (332) includes multiple 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 sealed to the intermediate sealing surface (3311). The inner and outer walls of the inner support (332) between two adjacent intermediate sealing rings (313) are provided with annular thinning structures and multiple second through holes (322) are evenly opened. The second through holes (322) and the first through holes (321) are intersected. The through hole group (32) includes a first through hole (321) and a second through hole (322) located in the same cross section. The inner ring of the support ring (3321) is provided with a mounting groove (3322) for installing the first sealing ring (311).

5. The rotary sealing assembly as claimed in claim 1, characterized in that: Two of the four adjacent sealing ring groups (31) are sealed to the first shaft segment (11), and the other two first sealing rings (311) are sealed to the second shaft segment (12). After these two sealing rings are sealed to the second shaft segment (12), a first lubrication cavity (41), a first buffer cavity (42), and a second lubrication cavity (43) are formed in sequence along the dispensing direction. The first lubrication cavity (41) and the second lubrication cavity (43) are used to store softener. Lubrication holes (24) are provided on the valve body sealing surfaces (21) with larger diameters corresponding to the first lubrication chamber (41) and the second lubrication chamber (43).

6. The rotary sealing assembly as claimed in claim 1, characterized in that: The valve core (1) also includes a third shaft segment (13) that connects to the second shaft segment (12) and has a diameter greater than the second shaft segment (12). Multiple second channels (15) that are axially aligned with the valve core (1) are evenly distributed around the outer side of the first channel (14). One of the two adjacent sealing ring groups (31) is sealed to the second shaft segment (12), and the other first sealing ring (311) is sealed to the third shaft segment (13) to form a second buffer cavity (44). The second shaft segment (12) corresponding to the second buffer cavity (44) is provided with multiple second inlets (151) that correspond one-to-one with and communicate with the second channel (15). The valve body sealing surface (21) with a larger diameter corresponding to the second buffer cavity (44) is provided with a second glue inlet hole (23).

7. The rotary sealing assembly as claimed in claim 6, characterized in that: After each pair of second sealing rings (312) in the six adjacent sealing ring groups (31) are sealed and connected to the first shaft segment (11), the second shaft segment (12) and the third shaft segment (13) respectively, a first lubrication cavity (41), a first buffer cavity (42), a second lubrication cavity (43), a second buffer cavity (44) and a third lubrication cavity (45) are formed in sequence along the glue discharge direction. The first lubrication cavity (41), the second lubrication cavity (43) and the third lubrication cavity (45) are all used to store softener. The valve body sealing surfaces (21) with larger diameters corresponding to the first lubrication chamber (41), the second lubrication chamber (43), and the third lubrication chamber (45) are all provided with lubrication holes (24).

8. A rotary glue applicator valve, characterized in that: Includes the rotary sealing assembly as described in any one of claims 1-7.

9. The rotary glue applicator valve as described in claim 8, characterized in that: It also includes a drive mechanism (7) and a transmission connection structure (5); A first stop ring (25) is provided on the outer side of the valve body sealing surface (21) with the smallest diameter inside the valve body (2), and a first bearing (6) is installed on the valve body (2) on the outer side of the first stop ring (25). The transmission connection structure (5) includes a cover (51), which is fixedly connected to the valve body (2). The rotary sealing 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). A second bearing (52) is installed in the through hole. The inner ring of the first bearing (6) and the inner ring of the second bearing (52) are both fixedly connected to the valve core (1). When the end cap (71) of the drive mechanism (7) is fixedly connected to the cover (51), the drive shaft (72) of the drive mechanism (7) is connected to the minimum diameter end of the valve core (1) by plugging.

10. The rotary glue applicator valve as described in claim 9, characterized in that: A locking nut (53) is installed at the smallest 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 locked, the locking nut (53) and the retaining ring (17) push the valve core (1) from both ends of the valve core (1) to fix the axial position of the valve core (1) relative to the valve body (2).

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