Multi-channel rotary seal structure, glue spraying head and glue spraying equipment

Abstract

The utility model discloses a kind of multi-channel rotary sealing structure, glue spraying head and glue spraying equipment, it is related to gluing equipment technical field, above-mentioned multi-channel rotary sealing structure includes glue outlet core, rotary shaft seat and sealing assembly, glue outlet core inside is equipped with several glue passing channels, preset gap is equipped between glue outlet core and glue passing ring, the inner wall and outer wall of glue passing ring are equipped with several annular glue passing grooves, glue passing groove is equipped with at least one glue passing hole, several glue passing channels are communicated with glue passing groove, preset gap is equipped between rotary shaft seat and glue passing ring, several corresponding glue inlet ports of outside glue passing groove are equipped on rotary shaft seat, sealing ring is respectively equipped between rotary shaft seat and glue passing ring, between glue outlet core and glue passing ring, glue passing ring does not directly contact between glue outlet core and rotary shaft seat, and sealing ring is non-metal material piece, so wear between sealing ring and glue outlet core, rotary shaft seat will not cause metal particle to scatter or directly mix into glue material.

Description

Technical Field

[0001] This utility model relates to the field of adhesive application equipment technology, and more specifically, to a multi-channel rotary sealing structure. Furthermore, this utility model also relates to an adhesive spraying head including the aforementioned multi-channel rotary sealing structure. Additionally, this utility model also relates to an adhesive spraying device including the aforementioned adhesive spraying head. Background Technology

[0002] Lithium-ion batteries, as the core energy storage carrier in the new energy industry, are widely used in new energy vehicles, energy storage power stations, and consumer electronics due to their high energy density, good consistency, and high degree of standardization.

[0003] To adapt to the requirements of cylindrical battery cells for annular adhesive paths and high-speed mass production, rotary dispensing heads have been gradually introduced. The dispensing port can rotate around the battery cell axis to directly generate annular adhesive paths without the need for additional translation of the battery cell or dispensing head, thus improving trajectory accuracy. The rotation process can enhance the shearing and mixing effect of components A and B, improving mixing uniformity.

[0004] Currently, existing rotary dispensing heads still suffer from wear and tear on the sealing structure between the rotating shaft and the dispensing head housing, leading to adhesive leakage. In addition, metal particles generated by friction of rotating parts may scatter or directly mix into the adhesive, posing a risk of causing internal short circuits in the battery cell.

[0005] In summary, how to reduce wear between rotating metal parts is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide a multi-channel rotary sealing structure, which adopts a multi-layer sealing structure to improve the sealing effect, and at the same time helps to reduce the entry of metal particles into the glue, thus avoiding the impact on the bonding of the battery cell.

[0007] Another objective of this invention is to provide a spray nozzle that includes the above-mentioned multi-channel rotary sealing structure.

[0008] Another objective of this invention is to provide a glue spraying device including the aforementioned glue spraying head.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A multi-channel rotary sealing structure, comprising:

[0011] The dispensing shaft has several glue channels inside. A glue ring is sleeved on the outside of the dispensing shaft, and a preset gap is provided between the dispensing shaft and the glue ring. The inner wall and outer wall of the glue ring are respectively provided with several annular inner glue grooves and several annular outer glue grooves. Each of the several inner glue grooves and several outer glue grooves is provided with at least one glue hole. The several glue channels are respectively connected to the corresponding inner glue grooves.

[0012] A rotating shaft seat is sleeved on the outside of the glue-passing ring and a preset gap is provided between the rotating shaft seat and the glue-passing ring. The rotating shaft seat is provided with a plurality of glue inlets corresponding to the outer glue-passing groove.

[0013] A sealing assembly includes a plurality of sealing rings, which are respectively disposed between the rotating shaft seat and the glue-passing ring, and between the glue-dispensing shaft core and the glue-passing ring, so that the plurality of inner glue-passing grooves and the plurality of outer glue-passing grooves are independent of each other, and the sealing rings are made of non-metallic materials.

[0014] Furthermore, all of the sealing rings described in this invention are engineering plastic parts.

[0015] Furthermore, the inner wall of the rotating shaft seat is provided with at least one positioning protrusion, which is used to fix the position of the rubber ring and the rotating shaft seat.

[0016] Furthermore, the present invention provides that the number of positioning protrusions is one, and it is located at one end of the rotating shaft seat, while the other end of the rotating shaft seat is detachably fitted with a sealing and pressing cover.

[0017] Furthermore, in this invention, there are several glue-passing rings, and each glue-passing ring is provided with at least one inner glue-passing groove and one outer glue-passing groove, and the several glue-passing rings are distributed sequentially along the axis of the glue-dispensing shaft.

[0018] Furthermore, the sealing assembly further includes:

[0019] Two rotating bushings are fitted onto the dispensing shaft core. One of the two rotating bushings is located at one end of the rotating shaft seat, and the other is located on the side of the sealing and pressing cover away from the rotating shaft seat.

[0020] Furthermore, the present invention includes a retaining ring detachably mounted on the dispensing shaft core, which is used to limit the position of the rotating shaft seat located near the sealing and pressing cover.

[0021] A glue spray head, comprising the multi-channel rotary sealing structure described in any one of the above claims.

[0022] Furthermore, this utility model also includes:

[0023] A mixing tube is sleeved on one end of the glue dispensing shaft core. A glue nozzle is installed on the end of the mixing tube away from the glue dispensing shaft core. The ends of several glue passages away from the glue passage ring are all connected to the mixing tube.

[0024] A bracket is installed on the side of the rotating shaft seat opposite to the mixing tube. The bracket is equipped with a motor for controlling the rotation of the dispensing shaft core and a reducer connected to the motor.

[0025] A glue spraying device, including the glue spraying head described above.

[0026] The multi-channel rotary sealing structure provided by this utility model involves fitting a glue-passing ring around the glue-dispensing shaft core. The inner and outer walls of the glue-passing ring each have several annular inner and outer glue-passing grooves, each with at least one glue-passing hole. Several glue-passing channels communicate with their respective inner glue-passing grooves. The glue-dispensing shaft core also has several glue-passing channels, each communicating with its corresponding inner glue-passing groove. A rotating shaft seat is fitted around the glue-passing ring, and this rotating shaft seat has several glue inlets corresponding to the outer glue-passing grooves. In other words, the glue-passing grooves on the glue-passing ring connect the glue-passing channels of the glue-dispensing shaft core to the glue-passing grooves, thereby allowing the glue inlets to pass through. It is connected to the glue channel, so the glue inlet and glue channel can still be connected when the glue dispensing shaft rotates. At the same time, a preset gap is maintained between the glue dispensing ring, the glue dispensing shaft, and the rotating shaft seat. Several sealing rings are respectively set between the rotating shaft seat and the glue dispensing ring, and between the glue dispensing shaft and the glue dispensing ring, so that the several inner glue dispensing grooves and the outer glue dispensing grooves are independent of each other and have extremely strong sealing performance. Therefore, the glue dispensing ring does not directly contact the glue dispensing shaft and the rotating shaft seat. Its sealing and positioning functions are achieved through the sealing rings. Moreover, the sealing rings are made of non-metallic materials. Therefore, the wear between the sealing rings and the glue dispensing shaft and the rotating shaft seat will not cause metal particles to scatter or directly mix into the glue, avoiding the impact on the glue coating of the battery cell.

[0027] The present invention also provides a glue spray head, which includes the above-mentioned multi-channel rotary sealing structure and has the above-mentioned beneficial effects.

[0028] The glue spraying device provided by this utility model includes the above-mentioned glue spraying head and has the above-mentioned beneficial effects. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0030] Figure 1 This is a side view of the device provided by this utility model;

[0031] Figure 2 This is a side cross-sectional view of the device provided by this utility model;

[0032] Figure 3 This is a schematic diagram of the axial structure of the device provided by this utility model;

[0033] Figure 4 This is a schematic diagram of the structure of the device provided by this utility model after disassembly on the shaft side.

[0034] Figure 5 A schematic diagram of the structure of the dispensing shaft and sealing assembly mating shaft side provided by this utility model;

[0035] Figure 6 This is a schematic diagram of the structure of the sealing ring provided by this utility model;

[0036] Figure 7 This is a schematic diagram of the side view of the glue dispensing shaft and sealing assembly provided by this utility model.

[0037] Figures 1-7 In the accompanying drawings, the reference numerals include:

[0038] 1. Glue dispensing shaft; 101. Glue passage; 2. Glue passage ring; 201. Outer glue passage groove; 202. Glue passage hole; 203. Inner glue passage groove; 3. Rotating shaft seat; 301. Positioning protrusion; 302. Glue inlet; 4. Sealing and clamping cover; 5. Sealing assembly; 501. Sealing ring; 502. Rotating bushing; 6. Retaining ring; 7. Mixing tube; 8. Glue spray nozzle; 9. Bracket; 10. Reducer; 11. Motor. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] The core of this utility model is to provide a multi-channel rotary sealing structure, which adopts a multi-layer sealing structure to improve the sealing effect and at the same time helps to reduce the entry of metal particles into the glue, thus avoiding the impact on the bonding of the battery cell.

[0041] Another key aspect of this invention is providing a spray nozzle that includes the aforementioned multi-channel rotary sealing structure.

[0042] Another core aspect of this invention is to provide a glue spraying device that includes the aforementioned glue spraying head.

[0043] Please refer to Figure 2 A multi-channel rotary sealing structure includes a dispensing shaft core 1, a rotating shaft seat 3, and a sealing assembly 5. The dispensing shaft core 1 has several dispensing channels 101 inside. A dispensing ring 2 is sleeved on the outside of the dispensing shaft core 1, with a preset gap between the dispensing shaft core 1 and the dispensing ring 2. The inner and outer walls of the dispensing ring 2 are respectively provided with several annular inner dispensing grooves 203 and outer dispensing grooves 201. Each inner and outer dispensing groove 203 and outer dispensing groove 201 has at least one dispensing hole 202. The dispensing channels 101... 01 is connected to the corresponding inner glue passage groove 203. The rotating shaft seat 3 is sleeved on the outside of the glue passage ring 2 and a preset gap is provided between them. The rotating shaft seat 3 is provided with a plurality of glue inlets 302 corresponding to the outer glue passage groove 201. The sealing assembly 5 includes a plurality of sealing rings 501. The plurality of sealing rings 501 are respectively provided between the rotating shaft seat 3 and the glue passage ring 2, and between the glue outlet shaft core 1 and the glue passage ring 2, so that the plurality of inner glue passage grooves 203 and outer glue passage grooves 201 are independent of each other.

[0044] It should be noted that in this embodiment of the invention, the glue-dispensing shaft core 1, the rotating shaft seat 3, and the glue-passing ring 2 are all made of metal to improve their service life, and are made of corrosion-resistant metal.

[0045] Optionally, in some embodiments, the plurality of sealing rings 501 respectively include a plurality of inner sealing rings 501 and a plurality of outer sealing rings 501, wherein the inner sealing rings 501 and the outer sealing rings 501 are used in conjunction with each other, and the inner sealing rings 501 and the outer sealing rings 501 of the same group are stacked to increase their sealing performance, and the inner sealing rings 501 and the outer sealing rings 501 of the same group are all located at the same position of the adhesive ring 2.

[0046] In the above embodiments, the inner sealing ring 501 adopts a rectangular or trapezoidal cross-section to increase its contact area, while the outer sealing ring 501 adopts a circular or elliptical structure to increase its compressive force.

[0047] Optionally, in some embodiments, the inner sealing ring 501 may be made of plastic to avoid wear between metal parts, while the outer sealing ring 501 may be made of rubber or silicone or other materials with greater elastic deformation to increase sealing and the compression effect on the inner sealing ring 501.

[0048] Optionally, in some embodiments, the inner sealing ring 501 may be made of engineering plastic material, and the inner sealing ring 501 and the dispensing shaft core 1 are interference-fitted.

[0049] Optionally, in some embodiments, the plurality of sealing rings 501 further include a plurality of external sealing rings 501, which are sleeved on the outside of the adhesive ring 2 so that the cavity between the adhesive ring 2 and the rotating shaft seat 3 remains independent.

[0050] Optionally, in some embodiments, the number of glue tanks and glue channels 101 can be determined according to the number of fluids that need to be mixed during use.

[0051] In use, the glue-passing ring 2 is fitted over the glue-dispensing shaft core 1. The inner and outer walls of the glue-passing ring 2 are respectively provided with several annular inner glue-passing grooves 203 and outer glue-passing grooves 201. Each inner and outer glue-passing groove 203 and outer glue-passing groove 201 has at least one glue-passing hole 202. Several glue-passing channels 101 are respectively connected to the corresponding inner glue-passing grooves 203. The glue-dispensing shaft core 1 has several glue-passing channels 101 inside, each connected to a corresponding inner glue-passing groove 203. A rotating shaft seat 3 is fitted over the glue-passing ring 2. The rotating shaft seat 3 has several glue inlets 302 corresponding to the outer glue-passing grooves 201. In other words, through the glue-passing grooves on the glue-passing ring 2, the glue-passing channels 101 of the glue-dispensing shaft core 1 are connected to the glue-passing grooves, thereby allowing the glue inlets 302 and the glue-passing channels to communicate. Since channel 101 is connected, the connection between the glue inlet 302 and the glue passage 101 can still be ensured when the glue dispensing shaft 1 rotates. At the same time, a preset gap is maintained between the glue passage ring 2, the glue dispensing shaft 1, and the rotating shaft seat 3. Several sealing rings 501 are respectively set between the rotating shaft seat 3 and the glue passage ring 2, and between the glue dispensing shaft 1 and the glue passage ring 2, so that the several inner glue passage grooves 203 and the outer glue passage grooves 201 are independent of each other and have extremely strong sealing performance. Therefore, the glue passage ring 2 does not directly contact the glue dispensing shaft 1 and the rotating shaft seat 3. Its sealing and positioning functions are achieved through the sealing rings 501. Moreover, the sealing rings 501 are made of non-metallic materials. Therefore, the wear between the sealing rings 501 and the glue dispensing shaft 1 and the rotating shaft seat 3 will not cause metal particles to scatter or directly mix into the glue, avoiding the impact on the glue coating of the battery cell.

[0052] Please refer to Figure 2In some embodiments, the inner wall of the rotating shaft seat 3 is provided with at least one positioning protrusion 301. The positioning protrusion 301 is used to fix the position of the glue ring 2 and the rotating shaft seat 3. That is, by providing the positioning protrusion 301 inside the rotating shaft seat 3, the position of the glue ring 2 is restricted to prevent the glue ring position from changing during use.

[0053] Please refer to Figure 1 To facilitate the replacement of parts, in some embodiments, the number of positioning protrusions 301 is one and located at one end of the rotating shaft seat 3. The other end of the rotating shaft seat 3 is detachably equipped with a sealing and pressing cover 4. That is, the sealing and pressing cover 4 is used to press the glue ring 2 to ensure that the glue ring 2 is fixed in its position.

[0054] Optionally, in some embodiments, the sealing and clamping cover 4 is provided with a through hole, through which the glue dispensing shaft 1 extends out of the sealing and clamping cover 4. At the same time, the sealing and clamping cover 4 is detachably installed on the rotating shaft seat 3 by bolts. Therefore, when it is necessary to replace internal parts, the sealing and clamping cover 4 can be removed from the rotating shaft seat 3 to open the rotating shaft seat 3, which greatly facilitates the replacement of the glue dispensing ring 2 or the sealing ring 501.

[0055] In the above embodiment, when the sealing and pressing cover 4 is installed on the rotating shaft seat 3, it contacts the glue ring 2 and presses it against the positioning protrusion 301. That is to say, the sealing and pressing cover 4 can contact the glue ring 2 to achieve pressing.

[0056] Optionally, in some embodiments, a gasket may be provided between the sealing and pressing cover 4 and the adhesive ring 2 to increase the pressing effect and prevent wear between the sealing and pressing cover 4 and the adhesive ring 2.

[0057] Please refer to Figure 6 In some embodiments, there are several glue-passing rings 2, and each glue-passing ring 2 is provided with at least one inner glue-passing groove 203 and an outer glue-passing groove 201. The several glue-passing rings 2 are distributed sequentially along the axis of the glue-dispensing shaft core 1. That is to say, using several glue-passing rings 2 with the same diameter can improve the contact sealing between them, and at the same time, it is convenient to replace them. Furthermore, the several glue-passing rings 2 can be replaced individually, reducing maintenance costs during use.

[0058] Optionally, in some embodiments, in order to further improve the basic seal between each adhesive ring 2, a sealing gasket may be provided between several adhesive rings 2 to increase its sealing performance.

[0059] Please refer to Figure 5In some embodiments, the sealing assembly 5 further includes two rotating bushings 502, both of which are sleeved on the dispensing shaft core 1. One of the two rotating bushings 502 is located at one end of the rotating shaft seat 3, and the other is located on the side of the sealing and pressing cover 4 away from the rotating shaft seat 3. That is, by setting the rotating bushings 502, the stability of the dispensing shaft core 1 during rotation is increased. Through the contact between the rotating bushings 502 and the dispensing shaft core 1, the coaxiality of the dispensing shaft core 1 during rotation is increased, and the sealing effect is enhanced.

[0060] Optionally, in some embodiments, the rotating bushing 502 is made of engineering plastic to reduce wear between metal parts and further reduce the entry of metal powder into the adhesive.

[0061] Please refer to Figure 7 In some embodiments, in order to further improve the stability of the position of the rotating bushing 502 during use, a retaining ring 6 is detachably installed on the dispensing shaft core 1 and is used to limit the position of the rotating shaft seat 3 near the sealing pressure cover 4. That is, the retaining ring 6 is installed on the dispensing shaft core 1 to limit the rotating bushing 502 and prevent it from leaving the use position.

[0062] Alternatively, in some embodiments, the retaining ring 6 is made of metal.

[0063] Optionally, in some embodiments, the glue dispensing shaft 1 is provided with a groove, and the outer diameter of the retaining ring 6 is larger than that of the glue dispensing shaft 1. The retaining ring 6 can be detached into the groove. Specifically, the retaining ring 6 is provided with a notch, and the retaining ring 6 can enter the groove through its own elastic deformation, so as to achieve the positioning of the rotating bushing 502.

[0064] A glue spray head, comprising the multi-channel rotary sealing structure of any one of the above.

[0065] Please refer to Figure 3 In some embodiments, the system further includes a mixing tube 7 and a bracket 9. The mixing tube 7 is sleeved on one end of the dispensing shaft 1. A nozzle 8 is installed on the end of the mixing tube 7 away from the dispensing shaft 1. The ends of several glue passages 101 away from the glue passage ring 2 are all connected to the mixing tube 7. The bracket 9 is installed on the side of the rotating shaft seat 3 away from the mixing tube 7. A motor 11 for controlling the rotation of the dispensing shaft 1 and a reducer 10 connected to the motor 11 are installed on the bracket 9. In other words, the glue in the multiple glue passages 101 of the dispensing shaft 1 is mixed by the mixing tube 7 and then sprayed out through the nozzle 8 to achieve its spraying effect.

[0066] A glue spraying device, including the glue spraying head described above.

[0067] In other words, the key point of this utility model is that: through the glue groove on the glue-feeding ring 2, the glue-feeding channel 101 of the glue-feeding shaft 1 is connected to the glue-feeding groove, thereby connecting the glue inlet 302 and the glue-feeding channel 101. Therefore, when the glue-feeding shaft 1 rotates, the connection between the glue inlet 302 and the glue-feeding channel 101 can still be guaranteed. At the same time, a preset gap is maintained between the glue-feeding ring 2, the glue-feeding shaft 1, and the rotating shaft seat 3, and several sealing rings 501 are respectively set between the rotating shaft seat 3 and the glue-feeding ring 2, and the glue-feeding channel 101 is connected to the glue-feeding groove on the glue-feeding ring 2. The adhesive core 1 and the adhesive ring 2 are designed to ensure that the several inner adhesive grooves 203 and the outer adhesive grooves 201 are independent of each other, resulting in a strong seal. Therefore, the adhesive ring 2 does not directly contact the adhesive core 1 or the rotating shaft seat 3. The sealing and positioning functions are achieved through the sealing ring 501. Since the sealing ring 501 is made of non-metallic material, the wear between the sealing ring 501 and the adhesive core 1 and the rotating shaft seat 3 will not cause metal particles to scatter or directly mix into the adhesive, thus avoiding any impact on the adhesive coating of the battery cell.

[0068] In addition to the multi-channel rotary sealing structure disclosed in the above embodiments, this utility model also provides a spray nozzle that includes the above-mentioned multi-channel rotary sealing structure. For the structure of other parts of the spray nozzle, please refer to the prior art, which will not be described in detail here.

[0069] In addition to the glue spraying head disclosed in the above embodiments, this utility model also provides a glue spraying device including the above-mentioned glue spraying head. For the structure of other parts of the glue spraying device, please refer to the prior art, which will not be described in detail here.

[0070] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0071] The multi-channel rotary sealing structure, glue spraying head, and glue spraying equipment provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A multi-channel rotary sealing structure, characterized in that, include: The glue dispensing shaft (1) has several glue passages (101) inside. A glue passage ring (2) is sleeved on the outside of the glue dispensing shaft (1) and there is a preset gap between the glue dispensing shaft (1) and the glue passage ring (2). The inner wall and outer wall of the glue passage ring (2) are respectively provided with several annular inner glue passage grooves (203) and several annular outer glue passage grooves (201). Each of the several inner glue passage grooves (203) and the several outer glue passage grooves (201) is provided with at least one glue passage hole (202). The several glue passages (101) are respectively connected to the corresponding inner glue passage grooves (203). A rotating shaft seat (3) is sleeved on the outside of the glue-passing ring (2) and a preset gap is provided between the rotating shaft seat (3) and the glue-passing ring (2). The rotating shaft seat (3) is provided with a plurality of glue inlets (302) corresponding to the outer glue-passing groove (201). The sealing assembly (5) includes a plurality of sealing rings (501), which are respectively disposed between the rotating shaft seat (3) and the glue-passing ring (2), and between the glue-dispensing shaft core (1) and the glue-passing ring (2), so that the plurality of inner glue-passing grooves (203) and the plurality of outer glue-passing grooves (201) are independent of each other. The sealing rings (501) are non-metallic parts.

2. The multi-channel rotary sealing structure according to claim 1, characterized in that, Several of the sealing rings (501) are engineering plastic parts.

3. The multi-channel rotary sealing structure according to claim 2, characterized in that, The inner wall of the rotating shaft seat (3) is provided with at least one positioning protrusion (301), which is used to fix the position of the rubber ring (2) and the rotating shaft seat (3).

4. The multi-channel rotary sealing structure according to claim 3, characterized in that, The number of the positioning protrusions (301) is one, and it is located at one end of the rotating shaft seat (3). The other end of the rotating shaft seat (3) is detachably fitted with a sealing pressure cover (4).

5. The multi-channel rotary sealing structure according to claim 2, characterized in that, There are several glue-passing rings (2), and each glue-passing ring (2) is provided with at least one inner glue-passing groove (203) and one outer glue-passing groove (201). The several glue-passing rings (2) are distributed sequentially along the axis of the glue-dispensing shaft (1).

6. The multi-channel rotary sealing structure according to claim 4, characterized in that, The sealing assembly (5) further includes: Two rotating bushings (502) are fitted onto the dispensing shaft core (1). One of the two rotating bushings (502) is located at one end of the rotating shaft seat (3), and the other is located on the side of the sealing and pressing cover (4) away from the rotating shaft seat (3).

7. The multi-channel rotary sealing structure according to claim 6, characterized in that, A retaining ring (6) is detachably installed on the dispensing shaft core (1) and is used to limit the position of the rotating shaft seat (3) located near the sealing pressure cover (4).

8. A glue spray head, characterized in that, Includes the multi-channel rotary sealing structure as described in any one of claims 1-7.

9. The glue spray head according to claim 8, characterized in that, Also includes: A mixing tube (7) is sleeved on one end of the glue dispensing shaft (1). A glue nozzle (8) is installed on the end of the mixing tube (7) away from the glue dispensing shaft (1). The ends of several glue passages (101) away from the glue passage ring (2) are all connected to the mixing tube (7). The bracket (9) is installed on the side of the rotating shaft seat (3) away from the mixing tube (7). The bracket (9) is equipped with a motor (11) for controlling the rotation of the dispensing shaft (1) and a reducer (10) connected to the motor (11).

10. A glue spraying device, characterized in that, Includes the glue spray head as described in claim 8 or 9.

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