Glue valve device for packaging machine

Abstract

The utility model relates to the technical field of cigarette manufacturing, in particular to a rubber valve device for a packaging machine. The end part of the glue pipe is provided with a glue discharging port, the plug is used for opening and closing the glue discharging port, and the plug sequentially comprises a cylindrical first sealing head and a circular-truncated-cone-shaped second sealing head along the glue discharging direction; the inner wall of the glue discharging opening sequentially comprises a first sealing part capable of being attached to the outer wall of the first sealing head and a second sealing part capable of being attached to the outer wall of the second sealing head in the glue discharging direction. According to the sealing device, the cylindrical first sealing head and the circular-truncated-cone-shaped second sealing head are arranged to be attached to the inner wall of the lower glue opening, the sealing area is increased, and therefore the sealing effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cigarette manufacturing technical field especially, relate to a glue valve device for packing machine. BACKGROUND

[0002] The glue valve is the key part of the glue supply system in ZB25 and ZB45 cigarette packing machine, and the stability of the glue valve directly affects the operation of the equipment.

[0003] The patent document with the announcement number CN221360863U discloses an improved special glue valve device of ZB25 / ZB45 packing machine, which comprises a valve body, a glue pipe body and a piston. The valve body of square structure is provided with mounting holes, positive pressure air input holes and screw holes for mounting a gland on the wall. The gland is connected with the valve body by screws. The piston is sleeved outside the glue pipe body and forms a seal with the valve body through a sealing ring. One end of the piston is installed in the valve body through a circular table provided on the upper part. A return spring is installed on the lower surface of the circular table. The piston head end provided outside the valve body is provided with a circular plug. The plug and the inner wall of the piston head are connected through a connecting piece and form a lower arc-shaped glue hole. The positive pressure air input holes are connected with compressed air through pipelines. When the positive pressure air is added into the valve body, the piston moves downward to compress the spring. When the positive pressure air is disconnected, the piston is reset by the spring, and the opening of the glue pipe body is blocked by the plug.

[0004] In the prior art, first, the opening of the glue pipe body is a cylindrical hole, and the plug is a cylindrical head. The contact area of the opening and the plug is small, so there are problems of poor sealing and easy overflow of the glue valve. Second, the sealing is realized by the reset of the compression spring. After long-term use, the elasticity of the compression spring decreases, so that the plug cannot completely contact the opening. This also leads to poor sealing and easy overflow of the glue valve. UTILITY MODEL CONTENTS

[0005] The utility model solves the above problems and provides a glue valve device for a packing machine with good sealing.

[0006] The technical scheme for solving the problem of the utility model is to provide a glue valve device for a packing machine, which comprises a glue pipe provided with a glue outlet at the end, and a plug for opening and closing the glue outlet. The plug comprises a first sealing head in the form of a cylinder and a second sealing head in the form of a circular table along the glue outlet direction. The inner wall of the glue outlet comprises a first sealing part that can contact the outer wall of the first sealing head along the glue outlet direction, and a second sealing part that can contact the outer wall of the second sealing head.

[0007] As the preferred of the utility model, the plug still includes the fixed rod that connects with the one end of the first sealing head away from the second sealing head, the fixed rod is equipped with the stop plate, one end of the rubber tube that is not set the lower glue hole is equipped with the piston plate, the piston plate is equipped with the through -hole for setting in the fixed rod, the elastic piece is equipped between the piston plate and the stop plate, the lateral wall of the rubber tube is equipped with the glue inlet.

[0008] As the preferred of the utility model, the stop plate divides the fixed rod into the lower section close to the first sealing head and the upper section away from the first sealing head, and the piston plate is set in the upper section.

[0009] As the preferred of the utility model, still include the control member for controlling the piston plate relative to the stop plate and move down, so that the lower glue hole is attached with the first sealing head and the second sealing head.

[0010] As the preferred of the utility model, the glue valve device sequentially includes the fixed sleeve, the rubber tube and the plug along from outside to inside direction, the fixed rod is fixedly connected with the top of the fixed sleeve, the piston plate and the fixed sleeve are respectively slidingly sealedly connected with the fixed rod, and the control cavity is formed between the piston plate and the top of the fixed sleeve, and the control member includes the pressure cylinder for passing into gas or liquid into the control cavity.

[0011] As the preferred of the utility model, the outer wall of the piston plate and the inner wall of the through -hole are equipped with the rubber ring.

[0012] As the preferred of the utility model, the inner wall of the rubber tube and the outer wall of the stop plate are slidingly sealedly connected.

[0013] As the preferred of the utility model, the outer wall of the rubber tube and the inner wall of the fixed sleeve are slidingly sealedly connected.

[0014] As the preferred of the utility model, the glue inlet is arranged on the lateral wall of the rubber tube outside the fixed sleeve.

[0015] As the preferred of the utility model, the fixed rod and the first sealing head are connected through the circular table type flow guide part.

[0016] The utility model discloses the beneficial effect:

[0017] 1. in the application, the first sealing head and the circular table type second sealing head are set to be attached with the inner wall of the lower glue hole, improve the sealing area, thereby improve the sealing effect.

[0018] 2. In some embodiments, the sealing is to control the downward movement of the rubber tube to fit with the first sealing head and the second sealing head, so that the fitting place is not easy to accumulate glue, further improving the sealing effect. On this basis, in some embodiments, the pressure cylinder is used to control the downward movement of the rubber tube for fitting, instead of the spring rebounding in the prior art to achieve fitting. The control effect of the pressure cylinder is more reliable to improve the sealing performance and prevent glue overflow. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic view of a glue valve device for a packaging machine when the glue outlet is opened;

[0020] Figure 2 is a structural schematic view of a glue valve device for a packaging machine when the glue outlet is closed;

[0021] Figure 3 is an installation schematic view of a glue valve device on a glue cylinder for a packaging machine;

[0022] In the figure: rubber tube 1, glue outlet 11, first sealing part 111, second sealing part 112, piston plate 12, glue inlet 13, plug 2, first sealing head 21, second sealing head 22, fixed rod 23, stop plate 231, elastic member 232, flow guide part 24, fixed sleeve 3. DETAILED DESCRIPTION

[0023] The following is a specific embodiment of the present application, which is further described in conjunction with the drawings. The present application is not limited to these embodiments.

[0024] A glue valve device for a packaging machine, as shown in Figure 1 and Figure 2 , comprises a rubber tube 1 provided with a glue outlet 11 at the lower end, and a plug 2 for opening and closing the glue outlet 11. The plug 2 includes a cylindrical first sealing head 21 and a circular truncated cone-shaped second sealing head 22 in sequence along the glue outlet direction. The outer diameter of the top end of the second sealing head 22 is consistent with the outer diameter of the first sealing head 21, and the outer diameter of the bottom end is larger than that of the top end. The inner wall of the glue outlet 11 includes a first sealing part 111 which can fit with the outer wall of the first sealing head 21 in sequence along the glue outlet direction, and the first sealing part 111 is a cylindrical surface; and a second sealing part 112 which can fit with the outer wall of the second sealing head 22, and the second sealing part 112 is a circular truncated cone surface.

[0025] When glue is discharged, as shown in Figure 1 , the plug 2 is controlled to move downward, or the rubber tube 1 is controlled to move upward, so that the sealing of the plug 2 to the glue outlet 11 is released, and the glue liquid in the rubber tube 1 can flow out from the glue outlet 11. When glue is not discharged, as shown in Figure 2As shown, the control plug 2 is moved upward until it completely matches the lower glue outlet 11, or the control glue pipe 1 is moved downward until it completely matches the plug 2, so as to seal the lower glue outlet 11. In the application, the matching area between the plug 2 and the lower glue outlet 11 is increased, so as to improve the sealing effect. At the same time, the second sealing head 22 and the second sealing part 112 of the circular truncated cone type are not matched during the relative movement, so as not to be easily rubbed and worn, so that even if the first sealing head 21 and the first sealing part 111 are matched and rubbed during the relative movement, the sealing effect is still achieved, and the service life of the glue valve device is improved.

[0026] In some embodiments, in order to control the movement of the plug 2 or the glue pipe 1, the plug 2 further comprises a fixed rod 23 connected to the end of the first sealing head 21 away from the second sealing head 22, and the outer diameter of the fixed rod 23 is smaller than that of the first sealing head 21, so as to facilitate the glue liquid to pass through. The fixed rod 23 is fixedly provided with a stop plate 231, which divides the fixed rod 23 into a lower segment close to the first sealing head 21 and an upper segment away from the first sealing head 21. At the same time, the upper end of the glue pipe 1, which is not provided with the lower glue outlet 11, is provided with a piston plate 12, and the piston plate 12 is provided with a through hole for sleeving the fixed rod 23, so that the piston plate 12 is sleeved on the fixed rod 23. An elastic member 232 is arranged between the piston plate 12 and the stop plate 231, and the elastic expansion direction of the elastic member 232 is the same as the movement direction of the plug 2 or the glue pipe 1, that is, the vertical direction.

[0027] The piston plate 12 can be sleeved on the upper segment of the fixed rod 23 or the lower segment of the fixed rod 23, and different sleeving modes determine the mode of opening and closing the lower glue outlet 11 of the plug 2.

[0028] For example, in some embodiments, the piston plate 12 is sleeved on the lower segment of the fixed rod 23, and in use, the glue pipe 1 is fixed. When glue is discharged, a downward pressure is applied to the stop plate 231, the elastic member 232 is compressed, the plug 2 is moved downward, and the first sealing head 21 and the second sealing head 22 are separated from the lower glue outlet 11 to open the lower glue outlet 11. When the glue is not discharged, the pressure on the stop plate 231 is released, the elastic member 232 rebounds, the plug 2 moves upward, and the first sealing head 21 and the second sealing head 22 match the lower glue outlet 11 to seal. In this embodiment, the glue inlet 13 can be arranged at any position of the side wall of the glue pipe 1. At the same time, in order to avoid that the glue liquid is taken out by the plug 2, a rubber ring is arranged on the inner wall of the through hole of the piston plate 12, which plays a sealing role.

[0029] For example, in some embodiments, as shown in FIG. 6, the piston plate 12 is sleeved on the upper segment of the fixed rod 23, and in use, the plug 2 is fixed. When the glue is discharged, the stop plate 231 is pressed downward, the elastic member 232 is compressed, the glue pipe 1 is moved downward, and the first sealing head 21 and the second sealing head 22 are separated from the lower glue outlet 11 to open the lower glue outlet 11. When the glue is not discharged, the pressure on the stop plate 231 is released, the elastic member 232 rebounds, the glue pipe 1 moves upward, and the first sealing head 21 and the second sealing head 22 match the lower glue outlet 11 to seal. Figure 1 and Figure 2As shown, the piston plate 12 is sleeved on the upper section of the fixed rod 23, and then the plug 2 is fixed in use. When glue is not needed, downward pressure is applied to the piston plate 12, so that the elastic member 232 is compressed, the glue pipe 1 and the glue outlet 11 are lowered to abut against the first sealing head 21 and the second sealing head 22 to complete sealing. When glue is needed, the pressure applied to the piston plate 12 is released, and the elastic member 232 rebounds to make the glue pipe 1 and the glue outlet 11 move upward to open the glue outlet 11. In this embodiment, the glue inlet 13 is arranged on the side wall of the glue pipe 1 corresponding to the lower section of the fixed rod 23. At the same time, in order to avoid that glue liquid is brought into the space where the elastic member 232 is located, the inner wall of the glue pipe 1 and the outer wall of the stop plate 231 are in sliding sealing connection, for example, a rubber ring is arranged on the outer wall of the stop plate 231.

[0030] In this embodiment, in some embodiments, a control member for controlling the piston plate 12 to move downward relative to the stop plate 231 so that the glue outlet 11 abuts against the first sealing head 21 and the second sealing head 22 is further included. For example, in some embodiments, the control member is a pressure cylinder, such as a pneumatic cylinder or an oil cylinder, as shown in Figure 1 and Figure 2 As shown, the glue valve device includes, in sequence from outside to inside, the fixed sleeve 3, the glue pipe 1, and the plug 2; the fixed rod 23 is fixedly connected with the top of the fixed sleeve 3; the piston plate 12 is in sliding sealing connection with the fixed rod 23 and the inner wall of the fixed sleeve 3, respectively, for example, a rubber ring is arranged on the outer wall of the piston plate 12 and the inner wall of the through hole, and a control cavity is formed between the piston plate 12 and the top of the fixed sleeve 3; the control member includes a pressure cylinder for introducing gas or liquid into the control cavity. The glue inlet 13 is arranged on the side wall of the glue pipe 1 outside the fixed sleeve 3. In use, the fixed sleeve 3 and the plug 2 are fixed, and introduction of positive pressure gas into the control cavity can increase the volume of the control cavity, thereby pushing the piston plate 12 and the glue pipe 1 to move downward to seal the glue outlet 11. At the same time, in order to improve the sealing effect in the control cavity to prevent air leakage, the outer wall of the glue pipe 1 and the inner wall of the fixed sleeve 3 are in sliding sealing connection, and the structure of the sliding sealing connection is not limited, for example, a rubber ring on the piston of a syringe can be used.

[0031] In addition, in the embodiments in which the fixed rod 23 is arranged, in some embodiments, the fixed rod 23 is connected with the first sealing head 21 through a circular truncated cone type flow guide 24, and the flow guide 24 forms an inclined flow guide between the side wall of the fixed rod 23 and the top of the first sealing head 21, so as to avoid accumulation of glue liquid on the first sealing head 21.

[0032] In this embodiment, in some embodiments, a glue cylinder with the glue valve device is provided, so as to facilitate installation and use of the glue valve device. As shown in Figure 3As shown, the side wall of the glue cylinder comprises a first vertical plate, a first horizontal plate, a second vertical plate and a second horizontal plate along the direction from bottom to top, the fixing sleeve 3 is installed on the second horizontal plate, the first horizontal plate is provided with a through hole for the glue pipe 1 to pass through, the lower glue outlet 11 is always located between the first horizontal plate and the bottom of the glue cylinder for feeding glue liquid into the glue cylinder, the glue inlet 13 of the glue pipe 1 is located between the first horizontal plate and the second horizontal plate and outside the glue cylinder, facilitating glue feeding and maintenance.

[0033] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. A glue valve device for a packaging machine, comprising a glue pipe (1) provided with a lower glue outlet (11) at one end, and a plug (2) for opening and closing the lower glue outlet (11), characterized in that: the plug (2) comprises a cylindrical first sealing head (21) and a circular truncated cone-shaped second sealing head (22) in sequence along the glue outlet direction; the inner wall of the lower glue outlet (11) comprises a first sealing part (111) which can be attached to the outer wall of the first sealing head (21), and a second sealing part (112) which can be attached to the outer wall of the second sealing head (22) in sequence along the glue outlet direction.

2. The glue valve device for a packaging machine according to claim 1, characterized in that: the plug (2) further comprises a fixed rod (23) connected to the end of the first sealing head (21) away from the second sealing head (22), and the fixed rod (23) is provided with a stop plate (231); the end of the glue pipe (1) not provided with the lower glue outlet (11) is provided with a piston plate (12), the piston plate (12) is provided with a through hole for sleeving the fixed rod (23), and an elastic element (232) is arranged between the piston plate (12) and the stop plate (231); the side wall of the glue pipe (1) is provided with a glue inlet (13).

3. A glue valve device for a packaging machine according to claim 2, characterized in that: The stop plate (231) divides the fixed rod (23) into a lower section close to the first sealing head (21) and an upper section away from the first sealing head (21); and the piston plate (12) is sleeved on the upper section.

4. A glue valve device for a packaging machine according to claim 3, characterized in that: Further comprising a control element for controlling the downward movement of the piston plate (12) relative to the stop plate (231) so that the lower glue outlet (11) is attached to the first sealing head (21) and the second sealing head (22).

5. A glue valve device for a packaging machine according to claim 4, characterized in that: The glue valve device comprises, in sequence from outside to inside, a fixed sleeve (3), the glue pipe (1), and the plug (2); the fixed rod (23) is fixedly connected to the top of the fixed sleeve (3); the piston plate (12) is in sliding sealing connection with the fixed rod (23) and the fixed sleeve (3) respectively, and a control cavity is formed between the piston plate (12) and the top of the fixed sleeve (3); the control element comprises a pressure cylinder for introducing gas or liquid into the control cavity.

6. A glue valve device for a packaging machine according to claim 5, characterized in that: The outer wall of the piston plate (12) and the inner wall of the through hole are provided with rubber rings.

7. A glue valve device for a packaging machine according to claim 4, characterized in that: The inner wall of the glue pipe (1) is in sliding sealing connection with the outer wall of the stop plate (231).

8. A glue valve device for a packaging machine according to claim 5, characterized in that: The outer wall of the glue pipe (1) is in sliding sealing connection with the inner wall of the fixed sleeve (3).

9. A glue valve device for a packaging machine according to claim 5, characterized in that: The glue inlet (13) is arranged on the side wall of the glue pipe (1) outside the fixed sleeve (3).

10. A glue valve device for a packaging machine according to claim 2, characterized in that: The fixed rod (23) and the first sealing head (21) are connected through a circular truncated cone-shaped flow guide part (24).

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