Annular external gluing device

Abstract

The utility model provides an annular external gluing device which comprises a glue bin and a glue conveying pipe communicated with the glue bin, and a first one-way structure is arranged in the glue conveying pipe. The glue outlet cavity is communicated with the free end of the glue conveying pipe, the glue outlet cavity is communicated with a glue outlet pipe, and a second one-way structure is arranged in the glue outlet pipe; the outer side of the driving piston is movably attached to the inner wall of the glue outlet cavity in a sealed mode. One end of the driving rod is connected with the driving piston, and the other end of the driving rod is positioned on the outer side of the glue outlet cavity; and the first driving mechanism is used for driving the driving rod to move. According to the annular external gluing device provided by the utility model, the production effect can be better.

Description

Technical Field

[0001] The utility model belongs to the technical field of production of dripping bottles and relates to an annular external glue coating device. Background Art

[0002] The drip chamber is a common medical consumable. After sterilization, it establishes a channel between the vein and the liquid medicine for intravenous infusion. It is generally composed of eight parts, including an intravenous needle or injection needle, a needle cap, an infusion hose, a liquid medicine filter, a flow rate regulator, a drip pot, a bottle stopper puncture device, and an air filter. Some infusion sets also have injection parts, drug addition ports, etc.

[0003] Among them, the medicine bottle used in conjunction with the drip bucket is also called a drip bucket bottle in the industry; the drip bucket bottle also needs to be coated with glue on its outer surface during the production process for adhering label paper, etc.; currently, the market usually uses a sponge soaked in glue to coat the outside of the drip bucket bottle with glue. This method is prone to internal glue sticking during the gluing process, and the production effect is poor. Utility Model Content

[0004] The utility model aims to provide an annular external glue coating device, aiming to solve the problem of poor production effect.

[0005] In order to solve the above technical problems, the utility model provides an annular external glue coating device, comprising:

[0006] A glue bin and a glue transfer pipe communicating with the glue bin, wherein the glue transfer pipe is provided with a first one-way structure;

[0007] A glue outlet cavity, the glue outlet cavity is communicated with the free end of the glue transfer tube, and the glue outlet cavity is connected to a glue outlet tube, and a second one-way structure is arranged in the glue outlet tube;

[0008] A driving piston, the outer side of which is sealingly and movably fitted to the inner wall of the glue outlet cavity;

[0009] A driving rod, one end of which is connected to the driving piston, and the other end of which is located outside the glue outlet cavity;

[0010] a first driving mechanism, the first driving mechanism being used to drive the driving rod to move;

[0011] The driving piston includes a glue feeding state and a glue discharging state;

[0012] When the driving piston is in the glue feeding state, the first one-way structure is in an open state, the glue enters the glue outlet cavity from the glue bin through the glue transfer tube, and the second one-way structure is in a closed state;

[0013] When the driving piston is in the glue discharging state, the first one-way structure is in a closed state, the second one-way structure is in an open state, and the glue in the glue discharging cavity is discharged outward through the glue discharging pipe.

[0014] The utility model is further configured that the glue outlet cavity, the glue transfer pipe and the glue bin are arranged in sequence up and down, and the glue outlet pipe is connected to the side of the bottom of the glue outlet cavity.

[0015] The utility model is further configured such that the first driving mechanism includes a first vertical bracket, a first cylinder body is vertically arranged on the side of the first bracket, a driving member is arranged on the output shaft of the first cylinder body, and the driving member is connected to the driving rod.

[0016] The utility model is further configured that the glue outlet cavity, the driving piston, the driving rod and the glue transfer tube are all provided with a plurality of them, and all the driving rods are connected to the driving member.

[0017] The utility model is further configured that the glue bin is provided with one, and all the glue transfer pipes are communicated with the glue bin.

[0018] The utility model is further configured such that a U-shaped or L-shaped second bracket is provided on the side of the first bracket, all the glue outlet cavities are connected to the second bracket, and the first cylinder body and the second bracket are staggered.

[0019] The utility model is further configured to include a third bracket, on which a clamping mechanism is provided, and the clamping mechanism is used to clamp a drip bucket bottle. The third bracket is provided with a second driving mechanism for driving the clamping mechanism to rotate, and a glue transfer column is vertically rotated at the end of the glue discharge tube, and a set gap is provided between the side wall of the glue transfer column and the open end of the glue discharge tube. When the driving piston is in the glue discharge state, the outer wall of the glue transfer column rotates to contact the side wall of the drip bucket bottle.

[0020] The utility model is further configured that the clamping mechanism includes a pneumatic clamping jaw, two clamping arms are arranged on two clamping jaws of the pneumatic clamping jaw, and a contoured groove matching the drip bottle is opened on the inner side of the clamping arm;

[0021] A second cylinder is vertically arranged on the side of the third bracket, a lifting frame is horizontally arranged on the output shaft of the second cylinder, a plurality of rotating rods are vertically passed through the lifting frame and are rotatably connected with the lifting frame, and each rotating rod has a pneumatic clamp at the bottom;

[0022] The second driving mechanism includes a third cylinder body horizontally arranged on the top of the lifting frame, a driving rack is horizontally arranged on the output shaft of the third cylinder body, a passive gear is arranged on each of the rotating rods, and all the passive gears are meshed with the driving rack.

[0023] The utility model is further configured as follows: the first one-way structure and the second one-way structure have the same shape, the first one-way structure includes an annular one-way ring, the outer wall of the one-way ring is connected to the inner wall of the glue transfer tube, and two semicircular one-way disks are hingedly provided at the middle part of the one-way ring away from the glue bin, and the inner wall of the glue transfer tube is also provided with a termination rod, and termination parts are provided on both sides of the termination rod, and the termination part and the termination rod are cross-shaped, and when the driving piston is in the glue feeding state, the outer sides of the two one-way disks respectively abut against the two ends of the termination part, and the cross-section of the two one-way disks is V-shaped.

[0024] The utility model is further configured as follows: the first unidirectional structure and the second unidirectional structure have the same shape, the first unidirectional structure includes a cross-shaped support portion, an elastic member which is continuously in a compressed state, and a sealing portion connected to the inner wall of the glue transfer tube, a truncated cone-shaped glue hole is provided through the sealing portion, and the end with a larger opening diameter of the glue hole is directly opposite to the support portion, a sealing ball is movably arranged in the glue hole, the diameter of the sealing ball is larger than the minimum diameter of the glue hole and smaller than the maximum diameter of the glue hole, the sealing ball is connected to the free end of the elastic member, the outer wall of the sealing portion is threadedly connected to the inner wall of the glue transfer tube, and a plurality of rotating holes are provided at the end of the sealing portion which is away from the support portion.

[0025] Compared with the prior art, the utility model provides an annular external glue coating device. When coating the outer wall of the dripping bucket bottle with glue, firstly, the first driving mechanism drives the driving piston to move through the driving rod, and makes the driving piston in a glue feeding state. At this time, the glue enters the glue outlet cavity from the glue bin through the glue transfer tube, and the glue in the glue outlet cavity cannot flow out through the glue outlet tube; then the driving piston moves in the opposite direction, so that the glue in the glue outlet cavity can flow out through the glue outlet tube and act on the outer wall of the dripping bucket bottle, but at the same time, the glue in the glue outlet cavity cannot enter the glue bin; in this way, the outer wall of the dripping bucket bottle can be coated with glue in a continuous cycle; at the same time, since the rule for the first driving mechanism to drive the driving piston to move is fixed, it can prevent the glue from entering the dripping bucket bottle during coating, thereby ensuring the coating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of an embodiment of a ring-shaped external glue coating device of the utility model. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the structure of an embodiment of a ring-shaped external glue coating device of the utility model. Figure 2 ;

[0028] Figure 3 It is a schematic diagram of an embodiment of a rubber outlet pipe part in an embodiment of a ring-shaped external glue coating device of the utility model;

[0029] Figure 4 It is an internal schematic diagram of an embodiment of a rubber outlet pipe part in an embodiment of a ring-shaped external glue coating device of the utility model;

[0030] Figure 5 yes Figure 4 A magnified view of part A;

[0031] Figure 6 It is an internal schematic diagram of an embodiment of a glue transfer hose part in an embodiment of a ring-shaped external glue coating device of the utility model.

[0032] Among them, 1. glue bin; 2. glue transfer hose; 3. glue outlet cavity; 4. glue outlet hose; 5. driving rod; 6. first bracket; 7. first cylinder; 8. driving member; 9. second bracket; 10. third bracket; 11. glue transfer column; 12. pneumatic clamp; 13. clamping arm; 14. second cylinder; 15. lifting frame; 16. rotating rod; 17. third cylinder; 18. driving rack; 19. passive gear; 20. one-way ring; 21. one-way disk; 22. termination rod; 23. termination part; 24. supporting part; 25. elastic part; 26. sealing part; 27. glue hole; 28. sealing ball; 29. ​​rotating hole. DETAILED DESCRIPTION

[0033] The following is a further detailed description of an annular external glue coating device proposed by the utility model in combination with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the utility model will be more clear. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model. The same or similar reference numerals in the drawings represent the same or similar components.

[0034] Example 1

[0035] An annular external glue coating device, such as Figures 1 to 5 As shown, including:

[0036] A glue bin 1 and a glue transfer pipe 2 connected to the glue bin 1, wherein a first one-way structure is arranged in the glue transfer pipe 2;

[0037] A glue outlet cavity 3, the glue outlet cavity 3 is communicated with the free end of the glue transfer tube 2, and the glue outlet cavity 3 is connected to a glue outlet tube 4, and a second one-way structure is arranged in the glue outlet tube 4;

[0038] A driving piston, the outer side of which is sealingly and movably fitted to the inner wall of the glue outlet cavity 3;

[0039] A driving rod 5, one end of which is connected to the driving piston, and the other end of which is located outside the glue outlet cavity 3;

[0040] A first driving mechanism, the first driving mechanism is used to drive the driving rod 5 to move;

[0041] The driving piston includes a glue feeding state and a glue discharging state;

[0042] When the driving piston is in the glue feeding state, the first one-way structure is in an open state, the glue enters the glue outlet cavity 3 from the glue bin 1 through the glue transfer tube 2, and the second one-way structure is in a closed state;

[0043] When the driving piston is in the glue discharging state, the first one-way structure is in a closed state, the second one-way structure is in an open state, and the glue in the glue discharging cavity 3 is discharged outward through the glue discharging pipe 4 .

[0044] The glue outlet cavity 3 , the glue transfer pipe 2 and the glue bin 1 are arranged in sequence up and down, and the glue outlet pipe 4 is connected to the side of the bottom of the glue outlet cavity 3 .

[0045] The first driving mechanism includes a first vertical bracket 6 , a first cylinder 7 is vertically disposed on the side of the first bracket 6 , a driving member 8 is disposed on the output shaft of the first cylinder 7 , and the driving member 8 is connected to the driving rod 5 .

[0046] The glue outlet cavity 3 , the driving piston, the driving rod 5 and the glue transfer tube 2 are all provided in plurality, and all the driving rods 5 are connected to the driving member 8 .

[0047] The glue bin 1 is provided with one, and all the glue transfer pipes 2 are communicated with the glue bin 1 .

[0048] A U-shaped or L-shaped second bracket 9 is disposed on the side of the first bracket 6 , all of the glue outlet cavities 3 are connected to the second bracket 9 , and the first cylinder 7 and the second bracket 9 are staggered.

[0049] It also includes a third bracket 10, on which a clamping mechanism is provided, and the clamping mechanism is used to clamp a drip bottle. The third bracket 10 is provided with a second driving mechanism for driving the clamping mechanism to rotate. A glue transfer column 11 is vertically rotated at the end of the glue outlet tube 4, and a set gap is provided between the side wall of the glue transfer column 11 and the open end of the glue outlet tube 4. When the driving piston is in the glue discharging state, the outer wall of the glue transfer column 11 rotates to contact the side wall of the drip bottle.

[0050] The clamping mechanism comprises a pneumatic clamping jaw 12, two clamping arms 13 are arranged opposite to each other on the two clamping jaws of the pneumatic clamping jaw 12, and a contoured groove matching the drip bottle is provided on the inner side of the clamping arm 13;

[0051] A second cylinder 14 is vertically disposed on the side of the third bracket 10, a lifting frame 15 is horizontally disposed on the output shaft of the second cylinder 14, and a plurality of rotating rods 16 are vertically passed through the lifting frame 15 and are rotatably connected to the lifting frame 15, and each rotating rod 16 has a pneumatic clamp 12 at its bottom;

[0052] The second driving mechanism includes a third cylinder 17 horizontally arranged on the top of the lifting frame 15, and a driving rack 18 is horizontally arranged on the output shaft of the third cylinder 17. A driven gear 19 is arranged on each of the rotating rods 16, and all the driven gears 19 are meshed with the driving rack 18.

[0053] The first one-way structure and the second one-way structure have the same shape but different directions. The first one-way structure includes an annular one-way ring 20, the outer wall of which is connected to the inner wall of the glue transfer tube 2. The one-way ring 20 is hingedly provided with two semicircular one-way disks 21 in the middle part of the side away from the glue bin 1. The inner wall of the glue transfer tube 2 is also provided with a stop rod 22. Stop parts 23 are provided on both sides of the stop rod 22. The stop parts 23 and the stop rod 22 are in a cross shape. When the driving piston is in the glue feeding state, the outer sides of the two one-way disks 21 respectively abut against the two ends of the stop part 23, and the cross-sections of the two one-way disks 21 are in a V shape.

[0054] The utility model provides an annular external glue coating device. When coating the outer wall of a drip bucket bottle with glue, firstly, a first driving mechanism drives a driving piston to move through a driving rod 5, and makes the driving piston in a glue feeding state. At this time, the glue enters the glue outlet cavity 3 from the glue bin 1 through the glue transfer tube 2, and the glue in the glue outlet cavity 3 cannot flow out through the glue outlet tube 4; then, the driving piston moves in the opposite direction, so that the glue in the glue outlet cavity 3 can flow out through the glue outlet tube 4 and act on the outer wall of the drip bucket bottle, but at the same time, the glue in the glue outlet cavity 3 cannot enter the glue bin 1; in this way, the outer wall of the drip bucket bottle can be coated with glue in a continuous cycle; at the same time, since the rule for the first driving mechanism to drive the driving piston to move is fixed, it can prevent the glue from entering the drip bucket bottle during coating, thereby ensuring the coating effect.

[0055] When actually applying glue, first, the second cylinder 14 drives the lifting frame 15 to descend, so that the height of the pneumatic clamping claw 12 is reduced, and each dripping bucket bottle in the lower row (the dripping bucket bottle stops after being conveyed to the designated position by the conveyor belt) has two clamping arms 13 on both sides; then the pneumatic clamping claw 12 (i.e., pneumatic fingers) controls the two clamping arms 13 to approach each other, and at this time, the two clamping arms 13 are buckled on both sides of the dripping bucket bottle through two arc-shaped profiling grooves, and the dripping bucket bottle is clamped;

[0056] After that, the second cylinder 14 rises, so that the end of each glue outlet pipe 4 is directly opposite to a dripping bottle, and the outer wall of each glue transfer column 11 is in contact with the corresponding dripping bottle; in the process of driving the piston downward, the glue in the glue outlet cavity 3 flows out through the glue outlet pipe 4 and adheres to the outer wall of the glue transfer column 11; at the same time, the third cylinder 17 drives the driving rack 18 to move, and the driving rack 18 drives all the rotating rods 16 to rotate through the passive gear 19, and at the same time, the rotating rod 16 drives all the pneumatic clamps 12 to rotate, so that all the dripping bottles are rotated, and then the glue transfer column 11 is driven to rotate during the rotation of the dripping bottle, so that the glue on the outer wall of the glue transfer column 11 is transferred to the outer wall of the dripping bottle, so that the required range of the outer wall of the dripping bottle is brushed with glue. In the above glue brushing process, the glue transfer column 11 can also play a blocking role on the glue at the end of the glue outlet pipe 4, preventing the glue from splashing or flowing out too much, and ensuring the stability of the glue brushing.

[0057] Since all the drip bottles can be rotated only through a third cylinder 17, the investment cost of the equipment is lower and the control effect is better; at the same time, only a first cylinder 7 and a driving member 8 are needed to drive all the driving rods 5 and the driving pistons to rise and fall, which can also reduce the equipment cost and the failure rate. In addition, the bottoms of all the glue transfer tubes 2 are connected to a glue bin 1. In this way, during the process of applying glue, even if the efficiency of applying glue by different glue outlet tubes 4 is different, since there is only one glue bin 1, when filling glue into the glue bin 1, only one glue bin 1 needs to be filled, which reduces the complexity of operation.

[0058] When the driving piston moves upward, the one-way disk 21 on the glue transmission tube 2 is in an open state, that is, the longitudinal section formed by the two one-way disks 21 is in a V-shape with the opening upward, so that the glue liquid can smoothly pass through the one-way disk 21 and flow into the glue outlet cavity 3; at the same time, the two one-way disks 21 on the glue outlet tube 4 form a complete disc shape and fit on the outside of the corresponding one-way ring 20 (that is, the one-way ring 20 in the glue outlet tube 4 is located between the one-way disk 21 and the glue outlet cavity 3), so that a closed state is formed, which prevents external air from entering the glue outlet cavity 3 and allows the glue liquid to flow into the glue outlet cavity 3 normally. Then, when the piston is driven downward, the glue liquid in the glue outlet cavity 3 generates pressure, which acts on the upper side of the one-way disk 21 in the glue transfer tube 2, thereby driving the two one-way disks 21 to return to a horizontal state, and work together with the one-way ring 20 to form a closed state; but at the same time, the glue liquid acts on the inner side of the one-way disk 21 in the glue outlet tube 4, and drives the two one-way disks 21 in the glue outlet tube 4 to rotate, so that the glue liquid can flow out of the glue outlet tube 4 normally.

[0059] Example 2

[0060] The difference from the first embodiment is that, Figure 6 As shown, the first unidirectional structure and the second unidirectional structure have the same shape but different directions. The first unidirectional structure includes a cross-shaped support portion 24, an elastic member 25 which is continuously in a compressed state, and a sealing portion 26 connected to the inner wall of the glue transfer tube 2. A truncated cone-shaped glue hole 27 is provided through the sealing portion 26. The end of the glue hole 27 with a larger opening diameter is directly opposite to the support portion 24. A sealing ball 28 is movably provided in the glue hole 27. The diameter of the sealing ball 28 is larger than the minimum diameter of the glue hole 27 and smaller than the maximum diameter of the glue hole 27. The sealing ball 28 is connected to the free end of the elastic member 25. The outer wall of the sealing portion 26 is threadedly connected to the inner wall of the glue transfer tube 2. A plurality of rotating holes 29 are provided at the end of the sealing portion 26 away from the support portion 24.

[0061] The supporting portion 24 in the glue transfer tube 2 is located above the sealing portion 26, and the sealing portion 26 in the glue outlet tube 4 is located between the supporting portion 24 and the glue outlet cavity 3; in this way, when the glue is in the glue feeding state, a negative pressure is formed in the glue outlet cavity 3, and the sealing ball 28 in the glue outlet tube 4 contacts the inner wall of the glue hole 27, and the external air cannot enter the glue outlet cavity 3 through the glue outlet tube 4; and the elastic member 25 in the glue transfer tube 2 is further compressed, so that the glue in the glue bin 1 can enter the glue outlet cavity 3; thereafter, when the piston is driven downward, the sealing ball 28 in the glue transfer tube 2 blocks the glue hole 27, while the glue hole 27 in the glue outlet tube 4 is in an open state. When connecting the support part 24 with the glue transfer tube 2 or the glue outlet tube 4, the support part 24 is first placed in a suitable position, and then the support part 24 and the glue transfer tube 2 or the glue outlet tube 4 are directly welded, and then the sealing part 26 is rotatably connected to the inner wall of the glue transfer tube 2 or the glue outlet tube 4. In this way, even if the reaction force of the elastic part 25 is received during the operation, the normal installation of the sealing part 26 is not affected, and the operation is simple and convenient; at the same time, the rotating hole 29 can be operated after the tool is inserted, which improves the convenience of operation.

[0062] The above description is only a description of the preferred embodiment of the utility model, and is not any limitation on the scope of the utility model. Any changes and modifications made by ordinary technicians in the field of the utility model based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A ring-shaped external glue coating device, characterized in that: include: A glue bin (1) and a glue transfer pipe (2) connected to the glue bin (1), wherein a first one-way structure is arranged in the glue transfer pipe (2); A glue outlet cavity (3), the glue outlet cavity (3) is in communication with the free end of the glue transfer tube (2), and the glue outlet cavity (3) is in communication with a glue outlet tube (4), and a second one-way structure is provided in the glue outlet tube (4); A driving piston, the outer side of which is sealingly and movably fitted to the inner wall of the glue outlet cavity (3); A driving rod (5), one end of which is connected to the driving piston, and the other end of which is located outside the glue outlet cavity (3); a first driving mechanism, the first driving mechanism being used to drive the driving rod (5) to move; The driving piston has a glue feeding state and a glue discharging state; When the driving piston is in the glue feeding state, the first one-way structure is in an open state, the glue flows from the glue bin (1) into the glue outlet cavity (3) through the glue transfer tube (2), and the second one-way structure is in a closed state; When the driving piston is in the glue discharging state, the first one-way structure is in a closed state, the second one-way structure is in an open state, and the glue in the glue discharging cavity (3) is discharged outward through the glue discharging pipe (4).

2. The annular external glue coating device according to claim 1, characterized in that: The glue outlet cavity (3), the glue transfer pipe (2) and the glue bin (1) are arranged in sequence up and down, and the glue outlet pipe (4) is connected to the side of the bottom of the glue outlet cavity (3).

3. The annular external glue coating device according to claim 1, characterized in that: The first driving mechanism comprises a first vertical bracket (6), a first cylinder (7) is vertically arranged on the side of the first bracket (6), a driving member (8) is arranged on the output shaft of the first cylinder (7), and the driving member (8) is connected to the driving rod (5).

4. The annular external glue coating device according to claim 3, characterized in that: The glue outlet cavity (3), the driving piston, the driving rod (5) and the glue transfer tube (2) are all provided in plurality, and all the driving rods (5) are connected to the driving member (8).

5. The annular external glue coating device according to claim 4, characterized in that: The glue bin (1) is provided with one, and all the glue transfer pipes (2) are in communication with the glue bin (1).

6. The annular external glue coating device according to claim 4, characterized in that: A U-shaped or L-shaped second bracket (9) is provided on the side of the first bracket (6), all the glue outlet cavities (3) are connected to the second bracket (9), and the first cylinder body (7) and the second bracket (9) are staggered.

7. The annular external glue coating device according to any one of claims 1 to 6, characterized in that: The invention also comprises a third bracket (10), on which a clamping mechanism is arranged, and the clamping mechanism is used to clamp a dripping bucket bottle. The third bracket (10) is provided with a second driving mechanism for driving the clamping mechanism to rotate. A glue transfer column (11) is arranged at the end of the glue discharge tube (4) for vertical rotation. A set gap is provided between the side wall of the glue transfer column (11) and the open end of the glue discharge tube (4). When the driving piston is in the glue discharge state, the outer wall of the glue transfer column (11) rotates to contact the side wall of the dripping bucket bottle.

8. The annular external glue coating device according to claim 7, characterized in that: The clamping mechanism comprises a pneumatic clamping jaw (12), two clamping jaws of the pneumatic clamping jaw (12) are provided with two clamping arms (13) opposite to each other, and the inner side of the clamping arm (13) is provided with a contoured groove matching the drip bottle; A second cylinder (14) is vertically arranged on the side of the third bracket (10); a lifting frame (15) is horizontally arranged on the output shaft of the second cylinder (14); a plurality of rotating rods (16) are vertically passed through the lifting frame (15) and are rotatably connected to the lifting frame (15); each rotating rod (16) has a pneumatic clamp (12) at its bottom; The second driving mechanism comprises a third cylinder (17) horizontally arranged on the top of the lifting frame (15), a driving rack (18) is horizontally arranged on the output shaft of the third cylinder (17), each of the rotating rods (16) is provided with a passive gear (19), and all the passive gears (19) are meshed with the driving rack (18).

9. The annular external glue coating device according to claim 1, characterized in that: The first one-way structure and the second one-way structure have the same shape. The first one-way structure comprises an annular one-way ring (20). The outer wall of the one-way ring (20) is connected to the inner wall of the glue transfer tube (2). Two semicircular one-way disks (21) are hingedly provided in the middle of the one-way ring (20) on the side away from the glue bin (1). The inner wall of the glue transfer tube (2) is also provided with a stop rod (22). Stop parts (23) are provided on both sides of the stop rod (22). The stop parts (23) and the stop rod (22) are in a cross shape. When the driving piston is in the glue feeding state, the outer sides of the two one-way disks (21) respectively contact the two ends of the stop part (23), and the cross-sections of the two one-way disks (21) are in a V shape.

10. The annular external glue coating device according to claim 1, characterized in that: The first unidirectional structure and the second unidirectional structure have the same shape. The first unidirectional structure comprises a cross-shaped support portion (24), an elastic member (25) which is continuously in a compressed state, and a sealing portion (26) connected to the inner wall of the rubber transfer tube (2). A truncated cone-shaped glue hole (27) is provided through the sealing portion (26). The end of the glue hole (27) with a larger opening diameter is directly opposite to the support portion (24). A sealing ball (28) is movably arranged in the glue hole (27). The diameter of the sealing ball (28) is larger than the minimum diameter of the glue hole (27) and smaller than the maximum diameter of the glue hole (27). The sealing ball (28) is connected to the free end of the elastic member (25). The outer wall of the sealing portion (26) is threadedly connected to the inner wall of the rubber transfer tube (2). The end of the sealing portion (26) which is away from the support portion (24) is provided with a plurality of rotating holes (29).

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