Maintenance-free glue coating device

Abstract

The utility model discloses a maintenance-free glue coating device. A rotary glue base is mainly used for driving a deflection distributor to be matched with a static distributor to realize the functions of glue spraying, waiting, glue returning, cleaning, blow-drying and the like. According to the design, the working state of the glue device can be set by utilizing the rotary deflection distributor, the static fixed distributor and a proper control valve, so that the design and processing of the device are optimized, the maintenance workload is reduced, and the equipment efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of cigarette processing, and particularly relates to a maintenance-free glue coating device. BACKGROUND

[0002] The Chinese patent 202311132797- "a maintenance-free glue coating device" provides an efficient solution for glue coating process through the innovative "glue return-washing integrated" technical system. The core of the device is to build a closed-loop fluid control system, which integrates the traditional dispersed glue return, washing and coating functions in a single device through integrated design. Its technical implementation mainly relies on the sleeve structure of the glue seat and the fixed distribution disc. The fixed distribution disc is internally provided with a dense axial pipe network, forming a multi-stage fluid distribution channel. During coating operation, glue is precisely metered and output through the axial pipe of the distribution disc. During the non-operation stage, the system realizes the recycling of excess glue through negative pressure suction, and simultaneously uses the cleaning medium to circulate and flush in the same pipe, significantly reducing the risk of glue solidification and blockage.

[0003] However, with the urgent demand for miniaturization and high integration in the field of precision manufacturing, the structural limitations of this patent technology gradually appear. First, in the mechanical design dimension, the sleeve structure of the fixed distribution disc and the glue seat needs to meet the spatial layout requirements of the axial pipe, which makes it difficult to reduce the diameter of the components and adapt to narrow working space. Second, the independent return pipe system set up to realize the glue return function, although it guarantees the glue recovery rate, significantly increases the complexity of the device. In typical configurations, more than 3 external control valves (including electromagnetic stop valves, proportional control valves, etc.) need to be set up, which not only increases the cost of peripheral components, but also causes the number of control nodes to multiply, resulting in an increase in system failure rate. Especially under high-frequency start-stop working conditions, the timing error of multi-valve coordinated control can easily cause incomplete glue return or residual cleaning medium and other problems.

[0004] The information disclosed in this BACKGROUND section is only intended to increase an understanding of the general context in which the present application can be practiced. It will be apparent that those of ordinary skill in the art can make and use the application without more details than set forth in the foregoing description. SUMMARY

[0005] The present application aims to provide a maintenance-free glue application device to overcome various problems of existing conventional glue application equipment in long-term use. The conventional equipment has complex mechanical structure, resulting in fast wear of parts, frequent maintenance, and serious impact on production progress. In addition, its function can only cover the basic glue application demand, and it is difficult to adapt to diversified production requirements. At the same time, these devices are not accurate in glue usage control, causing a lot of waste. Therefore, the present application is committed to solving the above problems, reducing the maintenance requirement by simplifying the mechanical structure, and improving the functional flexibility of the equipment and the precise control of the glue usage to meet the needs of different production scenes, while reducing waste.

[0006] To achieve the above-mentioned purpose, the present application provides a maintenance-free glue application device, comprising a glue seat rotating around an axis, a glue application nozzle is arranged on the outer wall of the glue seat along the axial direction, a first glue hole is arranged in the inside of the glue seat, one end of the first glue hole is communicated with the glue application nozzle, and the other end is communicated with the opening of the free end of the glue seat, further comprising a deflection distributor fixedly connected to the free end of the glue seat and a fixed distributor rotatably sleeved outside the deflection distributor;

[0007] A second glue hole is arranged in the inside of the deflection distributor along the axial direction, one end of the second glue hole is communicated with the first glue hole, and the other end extends to the circumferential surface of the deflection distributor and forms at least one glue hole;

[0008] The inner wall of the fixed distributor is provided with a glue outlet communicated with a glue source, an air outlet communicated with a cleaning gas source, and a water outlet communicated with a water source; the glue outlet, the air outlet, and the water outlet are offset by a predetermined angular displacement amount; when the glue hole is aligned with the glue outlet, a glue application working state is formed; when the glue hole is aligned with the air outlet, an air washing working state is formed; and when the glue hole is aligned with the water outlet, a water washing working state is formed.

[0009] The device innovatively adopts a rotation angle switching technology. Through this technology, the equipment can quickly and accurately switch between different working angles, easily perform glue application operation according to the preset path, and greatly improve the accuracy and uniformity of glue application. At the same time, the multi-channel distribution system cooperated with it further highlights the advancement of the device. The system can support multiple independent channels working at the same time, and the flow and pressure of glue in each channel can be independently controlled, ensuring that the glue can be accurately distributed to each glue application point, avoiding the problems of glue waste and uneven application, and realizing precise glue application.

[0010] These technical innovations enable the device to make major breakthroughs in multiple key performance indicators. In terms of automation, it can automatically operate according to the program, reducing manual work; it has strong reliability, reducing the probability of failure; it has good environmental protection, avoiding glue waste and pollution; and it has wide process adaptability, compatible with various glues and glue application processes.

[0011] This new type of gluing device provides an efficient and sustainable gluing solution for intelligent manufacturing, which not only solves many problems existing in traditional equipment, but also injects new vitality into the intelligent upgrading of industrial production, and promotes the entire industry to develop towards higher quality and sustainability.

[0012] Further preferably, the circumferential deflection angle of the glue outlet hole is 0°, the circumferential deflection angle of the air outlet hole and the water outlet hole is α+β, the air outlet hole and the water outlet hole are communicated through an annular communication groove in the fixed distributor inner wall, the annular communication groove is connected with an external clean gas source and a clean water source at the same time, and the supply of gas or water is controlled by an electromagnetic valve.

[0013] Further preferably, the air outlet hole and the water outlet hole are distributed side by side, and the glue outlet hole is offset from the air outlet hole and the water outlet hole by a predetermined angular displacement; when the glue hole is aligned with the glue outlet hole, a gluing working state is formed, and when the glue hole is aligned with the air outlet hole and the water outlet hole at the same time, a gas washing working state or a water washing working state is formed by using an electromagnetic valve.

[0014] Further preferably, the circumferential deflection angle of the glue outlet hole is 0°, the circumferential deflection angle of the air outlet hole and the water outlet hole is α+β, the air outlet hole and the water outlet hole are communicated through an annular communication groove in the fixed distributor inner wall, the annular communication groove is connected with an external clean gas source and a clean water source at the same time, and the supply of gas or water is controlled by an electromagnetic valve.

[0015] Further preferably, the deflection distributor is an axial body, one end of which is provided with a coaxial connection flange, and the inside of the coaxial connection flange and the inside of the deflection distributor are provided with a second glue hole channel penetrating in the axial direction.

[0016] Further preferably, the connection flange of the deflection distributor is connected to the glue seat through end face sealing and transmits angular displacement force through key groove structure.

[0017] Further preferably, the application further comprises a central shaft, one end of which is fixedly sleeved with the glue seat, and the other end of which is connected to the rotating end of the rotary driver.

[0018] Further preferably, the rotary driver is a direct drive motor or an indirect drive mechanism driven through a worm and gear pair or a gear pair.

[0019] Further preferably, a plurality of glue holes are distributed in the axial direction, and each glue hole is communicated with the glue hole channel through an independent branch hole.

[0020] Further preferably, the application further comprises a central shaft, one end of which is fixedly sleeved with the glue seat, and the other end of which is connected to the rotating end of the rotary driver.

[0021] Further preferably, the deflection distributor is further provided with a glue-return air channel in the axial and circumferential directions, one end of the glue-return air channel extends to the circumferential surface of the deflection distributor and forms at least one glue-return air outlet, the other end of the glue-return air channel extends to the circumferential surface of the deflection distributor and forms one glue-return air inlet,

[0022] The inner wall of the fixed distributor is provided with an air outlet corresponding to the glue-return air inlet of the deflection distributor after being deflected by a certain angle; when the glue-return air outlet is aligned with the glue-return air inlet, the glue-return air outlet is aligned with the glue outlet provided on the inner wall of the fixed distributor, forming a glue-return state.

[0023] Further preferably, the glue-return air channel includes an axial air channel or a branched air channel distributed in the axial and radial directions.

[0024] Further preferably, when the glue outlet in the inner hole of the fixed distributor and the glue-return air outlet are arranged at the position corresponding to 0° of the circumferential deflection angle, and the glue outlet of the deflection distributor is opposite to the glue outlet, the deflection distributor is provided with an axial glue-return air channel, a glue-return air inlet and a glue-return air outlet at the circumferential γ° position.

[0025] Further preferably, the glue outlet, water outlet and air outlet of the fixed distributor are axially corresponding to the glue inlet, water source, glue-return air source and cleaning air source, respectively.

[0026] When working, the driver drives the glue seat and the deflection distributor to deflect by a certain circumferential angular phase displacement, so that the glue seat is in the following working states:

[0027] Working state: the deflection angle is 0°, at this time, the glue outlet of the deflection distributor corresponds to the glue outlet of the fixed distributor, and the glue finally reaches the coating nozzle of the glue seat through the glue outlet and the glue hole;

[0028] Working state: the deflection angle is -γ°, at this time, the deflection distributor is reversely deflected to correspond to the glue-return air inlet and the air outlet on the inner wall of the fixed distributor, the glue-return air source is reversely pushed back to the glue source through the glue-return air outlet, the glue-return air inlet, the glue-return air channel, the glue-return air outlet and the glue outlet;

[0029] Working state: the deflection angle is α or α+β, at this time, the glue outlet of the deflection distributor corresponds to the air outlet of the fixed distributor, the cleaning air controlled by the electromagnetic valve finally reaches the coating nozzle of the glue seat through the glue outlet and the glue hole, forming cleaning and drying of the coating nozzle;

[0030] Or the cleaning water controlled by the electromagnetic valve finally reaches the coating nozzle of the glue seat through the glue outlet and the glue hole, forming cleaning of the coating nozzle.

[0031] Working state: deflection angle is α+β, at this time the glue hole of the deflection distributor corresponds to the water outlet hole of the fixed distributor, the cleaning water passes through the glue hole and the glue hole channel to finally reach the coating nozzle of the glue seat to form cleaning for the coating nozzle, and the sewage containing glue flows into the water tank.

[0032] Technical effects:

[0033] 1. Different rotation angles of the deflection distributor are used to realize glue coating, air drying, water cleaning, glue recovery in the pipeline, standby operation and other functions;

[0034] 2. The communication groove arranged in the inner hole of the fixed distributor cooperates with the rotating shaft of the deflection distributor to form a communication channel, so that one air blowing pipe recovers multiple glue, one cleaning water cleans multiple coating pipes and nozzles, and the cleaning water flows into the sewage tank to prevent pollution of the mechanical environment, and the cleaning water is discharged after cleaning to achieve all-pipe node without dead angle and comprehensive cleaning;

[0035] 3. The multiple glue pipes, cleaning water pipes and air blowing pipes are arranged on the fixed distributor without the need of rotating interface, which simplifies the mechanical structure, occupies small space and is especially suitable for the modification of original machine type equipment;

[0036] 4. The control is simple and the mechanical action is less, the rotation is used to realize function setting, and the electromagnetic valve is used to switch glue and cleaning water and cleaning air drying;

[0037] 5. The same air is used to realize glue recovery in the glue supply pipeline by using rotation angle setting, which reduces glue waste, reduces pipeline cleaning time and difficulty, improves production efficiency and reduces maintenance frequency. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is a schematic diagram of a direct drive for a driver, Figure 2 is a schematic diagram of a drive through a transmission;

[0039] Figure 3 and Figure 4 is a schematic diagram of a glue hole channel and a glue hole in a deflection distributor;

[0040] Figure 5 and Figure 6 is a schematic diagram of a hole channel and a hole in a fixed distributor;

[0041] Figure 7 , Figure 8 , Figure 9 is a schematic diagram of a glue hole corresponding to a fixed distributor at different angular displacements;

[0042] Figure 10 , Figure 11 is a schematic diagram of the structure when air washing and water washing working states are at the same deflection angular displacement;

[0043] Figure 12 、 Figure 13 Structure diagram of device with glue returning function;

[0044] Figure 14 、 Figure 15 Structure diagram of deflection distributor with axial glue returning air channel;

[0045] Figure 16 Structure diagram of glue returning air channel with axial and radial branch air channels;

[0046] Figure 17 、 Figure 18 Structure diagram of fixed distributor with glue returning air outlet;

[0047] Figure 19 、 Figure 20 Structure diagram of fixed distributor with glue outlet and glue returning air outlet arranged at 0°;

[0048] Figure 21 、 Figure 22 Structure diagram of glue returning air outlet and cleaning water outlet arranged at α+β circumferential angle;

[0049] Figure 23 Structure diagram of working state 1;

[0050] Figure 24 Structure diagram of working state 2;

[0051] Figure 25 Structure diagram of working state 3 and working state 4. DETAILED DESCRIPTION Embodiment

[0052] A maintenance-free glue coating device comprises a central shaft 1, a glue seat 2 fixedly sleeved on one end of the central shaft 1, an outer side wall of the glue seat 2 being provided with a glue coating nozzle 21 along an axial direction, a deflection distributor 3 axially fixedly connected with the glue seat 2, a fixed distributor 4 rotatably sleeved on the outside of the deflection distributor 3, and a rotary driver 5 for driving the deflection of the glue seat 2.

[0053] The deflection distributor 3 is an axial body, one end of which is provided with a coaxial connecting flange 31, an inside of the coaxial connecting flange 31 and an inside of the deflection distributor 3 being provided with a glue hole 32 penetrating along an axial direction, one end of the glue hole 32 being communicated with the glue coating nozzle 21 and the other end of the glue hole 32 extending to a circumferential surface of the deflection distributor 3 and forming a plurality of glue holes 33, the plurality of glue holes 33 being uniformly distributed along a circumferential direction and an axial direction, and each glue hole 33 being communicated with the axial glue hole 32 through an independent branch hole 34.

[0054] The fixed distributor 4 is provided with glue outlet holes 41 connected to a glue source, air outlet holes 42 connected to a cleaning gas source and water outlet holes 43 connected to a clean water source on the circumference of the inner wall of the fixed distributor 4.

[0055] The rotation driver 5 drives the glue seat 2 and the deflection distributor 3 to produce a predetermined angular displacement relative to the fixed distributor 4, the circumferential deflection angle of the glue outlet holes 41 is 0°, the circumferential deflection angle of the air outlet holes 42 is α, and the circumferential deflection angle of the water outlet holes 43 is α+β, wherein α and β are preset angle differences.

[0056] So that:

[0057] When the glue holes 33 are aligned with the glue outlet holes 41, a glue coating working state is formed;

[0058] When the glue holes 33 are aligned with the air outlet holes 42, an air washing working state is formed;

[0059] When the glue holes 33 are aligned with the water outlet holes 43, a water washing working state is formed.

[0060] Alternatively, when the glue holes 33 are aligned with the glue outlet holes 41, a glue coating working state is formed; the circumferential deflection angles of the air outlet holes 42 and the water outlet holes 43 are both α+β, the air outlet holes 42 and the water outlet holes 43 are connected through an annular communication groove 44 in the inner wall of the fixed distributor 4, the annular communication groove 44 is connected to an external cleaning gas source and a clean water source at the same time, and the supply of gas or water is controlled by an electromagnetic valve 45.

[0061] When the air outlet holes 42 and the water outlet holes 43 are located at the same angular displacement, the glue holes 33 are aligned with the air outlet holes 42 and the water outlet holes 43 at the same time, and an air washing working state or a water washing working state is formed by using the electromagnetic valve 45.

[0062] The connecting flange 31 of the deflection distributor 3 and the glue seat 2 are connected by end face sealing and transfer angular displacement force through key groove structure.

[0063] The rotation driver 5 is a direct drive motor or an indirect drive mechanism driven by a worm and gear pair or a gear pair.

[0064] The coating nozzle 21 is in a strip shape or a hole arranged along the axial direction of the glue seat. Embodiment

[0065] A maintenance-free glue coating device, comprising a central shaft 1, a glue seat 2 fixedly sleeved on one end of the central shaft, a glue coating nozzle 21 provided on the outer side wall of the glue seat along the axial direction, a deflection distributor 3 fixedly connected with the glue seat in the axial direction, a fixed distributor 4 rotatably sleeved on the outside of the deflection distributor 3, and a rotation driver 5 driving the deflection of the glue seat.

[0066] The deflection distributor 3 is a shaft-like body, one end of which is provided with a coaxial connection flange 31, the inside of the coaxial connection flange 31 and the inside of the deflection distributor 3 are provided with a through glue hole 32 in the axial direction, one end of the glue hole 32 communicates with the glue coating nozzle 21, the other end extends to the circumferential surface of the deflection distributor 3 and forms a plurality of glue holes 33; the plurality of glue holes 33 are uniformly distributed in the circumferential direction and in the axial direction, and each glue hole 33 communicates with the axial glue hole 32 through an independent branch hole 34.

[0067] The fixed distributor 4 is provided with glue outlet holes 41 communicating with a glue source, gas outlet holes 42 communicating with a cleaning gas source and water outlet holes 43 communicating with a clean water source on the inner wall circumference;

[0068] The rotary driver 5 drives the glue seat 2 and the deflection distributor 3 to produce a predetermined angular displacement relative to the fixed distributor 4, the circumferential deflection angle of the glue outlet hole 41 is 0°, the circumferential deflection angle of the gas outlet hole 42 is α, and the circumferential deflection angle of the water outlet hole 43 is α+β, wherein α and β are preset angle difference values.

[0069] So that: when the glue hole 33 is aligned with the glue outlet hole 41, a glue coating working state is formed; when the glue hole 33 is aligned with the gas outlet hole 42, a gas washing working state is formed; when the glue hole 33 is aligned with the water outlet hole 43, a water washing working state is formed.

[0070] Or: when the glue hole 33 is aligned with the glue outlet hole 41, a glue coating working state is formed; the circumferential deflection angles of the gas outlet hole 42 and the water outlet hole 43 are both α+β, the gas outlet hole 42 and the water outlet hole 43 are connected through an annular communication groove 44 in the inner wall of the fixed distributor 4, the annular communication groove 44 is connected with an external cleaning gas source and a clean water source at the same time, and the gas supply or water supply is controlled by an electromagnetic valve 45.

[0071] When the gas outlet hole 42 and the water outlet hole 43 are located at the same angular displacement, the glue hole 33 is aligned with the gas outlet hole 42 and the water outlet hole 43 at the same time, a gas washing working state or a water washing working state is formed by using the electromagnetic valve 45.

[0072] The connection flange 31 of the deflection distributor 3 and the glue seat 2 are connected by end face sealing and transfer angular displacement force by key groove structure.

[0073] The rotary driver 5 is a direct drive motor or an indirect drive mechanism driven by a worm and gear pair or a gear pair.

[0074] The coating nozzle 21 is long strip-shaped or a hole arranged along the axial direction of the glue seat.

[0075] The deflection distributor 3 is further provided with a glue-returning air channel 35 inside the deflection distributor 3 along the axial direction and the circumference, one end of the glue-returning air channel 35 extends to the circumference surface of the deflection distributor 3 and forms at least one glue-returning air outlet hole 36, the other end of the glue-returning air channel 35 extends to the circumference surface of the deflection distributor 3 and forms one glue-returning air inlet hole 37,

[0076] The inner wall circumference of the fixed distributor is provided with a glue outlet hole 46 corresponding to the glue-returning air inlet hole 37 of the deflection distributor after being deflected by a certain angle; when the glue-returning air outlet hole 36 is aligned with the glue outlet hole 41 provided on the inner wall circumference of the fixed distributor, the glue-returning air outlet hole 36 is aligned with the glue outlet hole 41 provided on the inner wall circumference of the fixed distributor, forming a glue-returning state.

[0077] The glue-returning air channel 35 includes an axial air channel or a branched air channel distributed along the axial direction and the radial direction.

[0078] When the glue outlet hole 41 in the inner hole of the fixed distributor 4 and the glue-returning air outlet hole 46 of the glue-returning air channel are arranged at the position corresponding to 0° of the circumferential deflection angle, and the glue hole 33 of the deflection distributor 3 is opposite to the glue outlet hole 41, the glue-returning air channel 35, the glue-returning air inlet hole 37 and the glue-returning air outlet hole 36 of the deflection distributor 3 are arranged at the circumferential γ° position.

[0079] The air outlet hole of the cleaning air is arranged at the position corresponding to α of the circumferential deflection angle, and the water outlet hole of the cleaning water is arranged at the position corresponding to α+β of the circumferential deflection angle;

[0080] Or the air outlet hole of the cleaning air and the water outlet hole of the cleaning water are arranged at the position corresponding to α or α+β of the circumferential deflection angle;

[0081] The glue outlet hole, the water outlet hole and the air outlet hole of the fixed distributor are respectively axially corresponding to the glue inlet hole, the clean water source, the glue-returning air source and the cleaning air source;

[0082] When working, the driver 5 drives the glue seat 2 and the deflection distributor 3 to deflect by a certain circumferential angular phase displacement, so that the glue seat is in the following working state:

[0083] Working state 1: the deflection angle is 0°, at this time the glue hole 33 of the deflection distributor corresponds to the glue outlet hole 41 of the fixed distributor, the glue passes through the glue hole 33 and the glue hole 32 and finally reaches the coating nozzle 21 of the glue seat 2;

[0084] Working state 2: the deflection angle is -γ°, at this time the deflection distributor 3 is reversely deflected to correspond to the glue-returning air inlet hole 37 and the glue outlet hole 46 of the inner wall of the fixed distributor, the glue-returning air source passes through the glue-returning air outlet hole 46, the glue-returning air inlet hole 37, the glue-returning air channel 35, the glue-returning air outlet hole 36 and the glue outlet hole 41 to reversely push the glue in the glue port back to the glue source;

[0085] Working state 3: the deflection angle is α or α+β, at this time the glue hole 33 of the deflection distributor 3 corresponds to the air outlet hole 42 of the fixed distributor, the electromagnetic valve controls the cleaning gas to pass through the glue hole 33, the glue hole channel 32 and finally reach the coating nozzle 21 of the glue seat 2 to form cleaning and drying of the coating nozzle 21;

[0086] Or the electromagnetic valve controls the cleaning water to pass through the glue hole 33, the glue hole channel 32 and finally reach the coating nozzle 21 of the glue seat 2 to form cleaning of the coating nozzle 21;

[0087] Working state 4: the deflection angle is α+β, at this time the glue hole of the deflection distributor corresponds to the water outlet hole of the fixed distributor, the cleaning water passes through the glue hole 33, the glue hole channel 32 and finally reaches the coating nozzle 21 of the glue seat 2 to form cleaning of the coating nozzle 21, and the sewage with glue dirt flows into the water tank.

Claims

1. A maintenance-free glue applying device, comprising a glue seat (2) rotating along an axis, an outer wall of the glue seat (2) being provided with a glue applying nozzle (21) in the axial direction, and a first glue channel being provided inside the glue seat (2), one end of the first glue channel being communicated with the glue applying nozzle (21) and the other end being communicated with an opening at a free end of the glue seat (2), characterized in that: The deflection distributor (3) is fixedly connected to the free end of the glue seat, and the fixed distributor (4) is rotatably sleeved on the deflection distributor (3). ​ The second glue hole (32) is arranged in the deflection distributor (3) and extends to the circumferential surface of the deflection distributor (3) to form at least one glue hole (33). The inner wall of the fixed distributor (4) is provided with a glue outlet (41) connected to the glue source, an air outlet (42) connected to the cleaning gas source and a water outlet (43) connected to the clean water source.

2. The maintenance-free glue applicator of claim 1, wherein: The circumferential deflection angle of the glue outlet (41) is 0°, the circumferential deflection angle of the air outlet (42) is α, and the circumferential deflection angle of the water outlet (43) is α+β, wherein α and β are preset angle differences.

3. The maintenance-free glue applicator of claim 1, wherein: Alternatively, the air outlet (42) and the water outlet (43) are arranged side by side, and the glue outlet (41) is offset from the air outlet (42) and the water outlet (43) by a predetermined angular displacement.

4. The maintenance-free glue applicator of claim 3, wherein: The circumferential deflection angle of the glue outlet (41) is 0°, the circumferential deflection angle of the air outlet (42) and the water outlet (43) are both α+β, the air outlet (42) and the water outlet (43) are connected through the annular communication groove (44) in the inner wall of the fixed distributor (4), and the annular communication groove (44) is connected to the external cleaning gas source and the clean water source at the same time and is controlled by the electromagnetic valve (45) to supply air or water.

5. The maintenance-free glue applicator of claim 1, wherein: The deflection distributor (3) is an axial body, one end of which is provided with a coaxial connection flange (31), and the inside of the coaxial connection flange (31) and the inside of the deflection distributor (3) are provided with a second glue hole (32) extending in the axial direction.

6. The maintenance-free glue applicator of claim 5, wherein: The connection flange (31) of the deflection distributor (3) is connected to the glue seat (2) through end face sealing and transmits angular displacement force through a key groove structure.

7. The maintenance-free glue applicator of claim 1, wherein: The center shaft (1) is fixedly sleeved with the glue seat (2) at one end and connected to the rotating end of the rotary driver (5) at the other end.

8. The maintenance-free glue applicator of claim 7, wherein: The rotary driver (5) is a direct drive motor or an indirect drive mechanism driven through a worm and gear pair or a gear pair.

9. The maintenance-free glue applicator of claim 1, wherein: A plurality of glue holes (33) are arranged in the axial direction, and each glue hole (33) is connected to the glue hole (32) through an independent branch hole (34).

10. The maintenance-free glue applicator of claim 1, wherein: The glue coating nozzle (21) is in the shape of a long strip or a hole arranged in the axial direction of the glue seat.

11. The maintenance-free glue applicator of claim 1, wherein: The deflection distributor (3) is further provided with a glue return air channel (35) inside along the axial direction and the circumference, one end of the glue return air channel (35) extends to the circumference surface of the deflection distributor (3) and forms at least one glue return air outlet (36), the other end extends to the circumference surface of the deflection distributor (3) and forms a glue return air inlet (37), The inner wall circumference of the fixed distributor is provided with the glue return air outlet (36) corresponding to the glue return air inlet (37) of the deflection distributor after being deflected by a certain angle; when the glue return air outlet (36) is aligned with the glue return air inlet (37), the glue return air outlet (36) is aligned with the glue outlet (41) provided on the inner wall circumference of the fixed distributor, forming a glue recovery state.

12. The apparatus of claim 11, wherein: The glue return air channel (35) includes an axial air channel or a branched air channel distributed along the axial direction and the radial direction.

13. The maintenance-free glue applicator of claim 11, wherein: When the glue outlet (41) in the inner hole of the fixed distributor (4), the glue return air outlet (36) are arranged at the 0° position corresponding to the circumferential deflection angle, and the glue hole (33) of the deflection distributor (3) is opposite to the glue outlet (41), the deflection distributor (3) is provided with the axial glue return air channel (35), the glue return air inlet (37) and the glue return air outlet (36) at the circumferential γ° position.

14. The maintenance-free glue applicator of claim 13, wherein: The glue outlet, water outlet and air outlet of the fixed distributor are respectively axially corresponding to the glue inlet, water source, glue return air source and cleaning air source; When working, the glue seat (2) and the deflection distributor (3) are deflected by a certain circumferential angular phase displacement amount under the driving of the rotary driver (5), so that the glue seat is in the following working states: Working state 1: the deflection angle is 0°, at this time the glue hole (33) of the deflection distributor is corresponding to the glue outlet (41) of the fixed distributor, the glue passes through the glue hole (33) and the glue hole (32) and finally reaches the glue coating nozzle (21) of the glue seat (2); Working state 2: the deflection angle is -γ°, at this time the deflection distributor (3) is reversely deflected to the glue return air inlet (37) corresponding to the glue return air outlet (36) of the inner wall of the fixed distributor, the glue return air source passes through the glue return air inlet (37), the glue return air channel (35), the glue return air outlet (36) and the glue outlet (41) to return the glue in the glue port to the glue source; Working state 3: the deflection angle is α or α+β, at this time the glue hole (33) of the deflection distributor (3) is corresponding to the glue return air outlet (36) of the fixed distributor, the electromagnetic valve controls the cleaning air to pass through the glue hole (33) and the glue hole (32) and finally reaches the glue coating nozzle (21) of the glue seat (2) to form cleaning and drying of the glue coating nozzle (21); Or the electromagnetic valve controls the cleaning water to pass through the glue hole (33) and the glue hole (32) and finally reaches the glue coating nozzle (21) of the glue seat (2) to form cleaning of the glue coating nozzle (21); Working state 4: the deflection angle is α+β, at this time the glue hole of the deflection distributor is corresponding to the water outlet of the fixed distributor, the cleaning water passes through the glue hole (33) and the glue hole (32) and finally reaches the glue coating nozzle (21) of the glue seat (2) to form cleaning of the glue coating nozzle (21), and the sewage containing glue dirt flows into the water tank.

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