Sealing structure for filling machine

Abstract

The utility model discloses a sealing structure for a filling machine, which belongs to the technical field of filling machines, and comprises a filling head, the bottom end of the filling head is communicated with a liquid outlet pipe, one side, close to the middle, of the filling head is communicated with a liquid inlet pipe, and the top end of the filling head is provided with a top cover; according to the utility model, when the filling head is in an initial state, the sealing plug is used for blocking the liquid outlet pipe through the second spring and sealing the liquid outlet pipe of the filling head, when filling is needed, the hydraulic pressure in the filling head is increased, the piston is pushed to overcome the second spring to move upwards, the sealing plug is used for opening the liquid outlet pipe, and when filling is carried out through the filling head and liquid injection is stopped, the liquid outlet pipe is sealed. And the hydraulic pressure in the filling head is reduced, the piston is driven by the second spring to move downwards, so that the sealing plug blocks the liquid outlet pipe again, the filling head can be automatically opened and closed according to the filling state through the sealing structure of the filling head, and the practicability of the sealing structure of the filling head is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filling machines, in particular to a sealing structure for a filling machine. Background Art

[0002] In the production process of liquid or paste products such as milk, yogurt, ice cream, etc., the products need to be poured into packaging containers such as bottles or bags. In this process, filling equipment is usually used. When the filling machine is in use, a sealing structure is required to seal the filling head.

[0003] The sealing structure of the current filling machine, for example, a sealing structure and a filling machine for a filling machine proposed in Publication No.: CN218909814U, this sealing structure is achieved by arranging a disc seat covered with a complete rubber bag at the discharge port of the filling tube, and the discharge port of the filling tube is sealed or opened under the drive of the valve stem. When filling, the valve stem drives the disc seat to move upward, and the disc seat is away from the discharge port, so that the discharge port is in an open state. When the filling is stopped, the valve stem drives the disc seat to move downward, and the disc seat seals the discharge port, so that the discharge port is in a closed state, ensuring that the slurry does not drip out. Through this sealing structure, the coupling between the valve stem and the filling tube is strengthened, avoiding dripping and splashing when the filling is stopped, which causes adverse effects and influences.

[0004] When the sealing structure of the existing filling machine is in use, the valve stem needs to drive the disc seat to rise and fall to control the opening and closing of the filling head. The valve stem rise and fall needs to be controlled by electrical components, and it cannot automatically rise and fall to control the opening and closing of the filling head, which is inconvenient to use. Utility Model Content

[0005] The utility model aims to provide a sealing structure for a filling machine, which achieves the purpose of automatically opening and closing the filling head according to the filling state through the sealing structure of the filling head, thereby effectively improving the practicability of the sealing structure of the filling head.

[0006] To achieve the above object, the utility model provides the following technical solution: a sealing structure for a filling machine, comprising a filling head, the bottom end of the filling head is connected to a liquid outlet pipe, and the side of the filling head near the middle is connected to a liquid inlet pipe, wherein:

[0007] A top cover is installed at the top of the filling head, and the top cover is connected to the filling head through a quick disassembly mechanism. A piston is arranged on the inner side of the filling head near the top of the liquid inlet pipe. A guide rod groove runs through the middle of the top cover, and a guide rod runs through the guide rod groove. The bottom end of the guide rod is fixedly connected to the piston.

[0008] The end of the guide rod near the top cover is fixedly connected with a baffle, the guide rod between the piston and the top cover is sleeved with a second spring, the middle of the bottom end of the piston is fixedly connected with a support rod, and the bottom end of the support rod near the liquid outlet pipe is fixedly connected with a sealing plug.

[0009] Preferably, the quick disassembly and assembly mechanism includes an installation head, the top end of the filling head is fixedly connected to the installation head, a sealing ring is installed on the top of the ring side of the installation head, a block groove is opened on the inner wall of the top cover near the bottom of the installation head, the top cover is connected to the outer side of the block groove corresponding to the block groove with a pull rod groove, a first spring is installed in the block groove, a block is installed on the opening side of the first spring near the block groove, and the end of the block near the pull rod groove is fixedly connected to the pull rod.

[0010] Preferably, the lower part of the clamping block away from the first spring is a curved surface, and the clamping block is elastically connected to the top cover through the first spring.

[0011] Preferably, the guide rod is in the shape of a rectangular column, and the outer dimensions of the guide rod are consistent with the inner dimensions of the guide rod groove.

[0012] Preferably, the outer diameter of the sealing plug is larger than the inner diameter of the liquid outlet pipe, and the outer diameter of the sealing plug is smaller than the inner diameter of the filling head.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. In the utility model, when the filling head is in the initial state, the sealing plug blocks the liquid outlet pipe through the second spring to seal the liquid outlet pipe of the filling head. When filling is required, the hydraulic pressure in the filling head increases, pushing the piston to overcome the second spring and move upward, so that the sealing plug opens the liquid outlet pipe, and filling is carried out through the filling head. When the injection is stopped, the hydraulic pressure in the filling head decreases, and the piston is driven to move downward by the second spring, so that the sealing plug blocks the liquid outlet pipe again. Through the sealing structure of the filling head, the filling head can be automatically opened and closed according to the filling state, which effectively improves the practicality of the sealing structure of the filling head.

[0015] 2. According to the utility model, when the top cover needs to be removed, the clamping block is retracted into the clamping block groove by the pull rod, so that the top cover and the filling head can be separated. When the top cover is installed, the top cover is covered on the top of the filling head. When the curved surface of the clamping block abuts against the installation head, the clamping block is squeezed and retracted into the inside of the clamping block groove to overcome the elastic force of the first spring. When the clamping block moves to the bottom of the installation head, the first spring makes the clamping block extend out of the clamping block groove and abut against the bottom of the installation head, so that the top cover and the filling head can be installed. The sealing structure of the filling head is installed and connected to the top cover, and the sealing structure of the filling head can be disassembled or installed through the top cover that is easy to disassemble and assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 For this utility model Figure 1 A schematic diagram of the partially enlarged structure at center A;

[0018] Figure 3 For this utility model Figure 1 Schematic diagram of the local enlarged structure at point B in the middle.

[0019] In the figure: 1. filling head; 2. liquid outlet pipe; 3. liquid inlet pipe; 4. top cover; 5. mounting head; 6. sealing ring; 7. block groove; 8. pull rod groove; 9. first spring; 10. block; 11. pull rod; 12. piston; 13. guide rod groove; 14. guide rod; 15. baffle; 16. second spring; 17. support rod; 18. sealing plug. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example:

[0022] See also Figures 1 to 3 The utility model provides a technical solution: a sealing structure for a filling machine, including a filling head 1, a liquid outlet pipe 2, a liquid inlet pipe 3, a top cover 4, a mounting head 5, a sealing ring 6, a block groove 7, a pull rod groove 8, a first spring 9, a block 10, a pull rod 11, a piston 12, a guide rod groove 13, a guide rod 14, a baffle 15, a second spring 16, a support rod 17, and a sealing plug 18. The bottom end of the filling head 1 is connected with the liquid outlet pipe 2, and the side of the filling head 1 near the middle is connected with the liquid inlet pipe 3, wherein,

[0023] A top cover 4 is installed at the top of the filling head 1, and the top cover 4 is connected to the filling head 1 through a quick disassembly mechanism. A piston 12 is arranged on the inner side of the filling head 1 near the top of the liquid inlet pipe 3. A guide rod groove 13 runs through the middle of the top cover 4, and a guide rod 14 runs through the guide rod groove 13. The bottom end of the guide rod 14 is fixedly connected to the piston 12.

[0024] The end of the guide rod 14 near the top cover 4 is fixedly connected with a baffle 15, the guide rod 14 between the piston 12 and the top cover 4 is sleeved with a second spring 16, the middle of the bottom end of the piston 12 is fixedly connected with a support rod 17, and the bottom end of the support rod 17 near the liquid outlet pipe 2 is fixedly connected with a sealing plug 18;

[0025] When the filling head 1 is in the initial state, the sealing plug 18 blocks the liquid outlet pipe 2 through the second spring 16, so as to seal the liquid outlet pipe 2 of the filling head 1. When filling is required, the hydraulic pressure in the filling head 1 increases, pushing the piston 12 to overcome the second spring 16 and move upward, so that the sealing plug 18 opens the liquid outlet pipe 2, and filling is carried out through the filling head 1. When the injection is stopped, the hydraulic pressure in the filling head 1 decreases, and the piston 12 is driven to move downward by the second spring 16, so that the sealing plug 18 blocks the liquid outlet pipe 2 again. Through the sealing structure of the filling head 1, the filling head 1 can be automatically opened and closed according to the filling state, which effectively improves the practicality of the sealing structure of the filling head 1.

[0026] See also Figures 1 to 3 The quick disassembly and assembly mechanism includes a mounting head 5, the top of the filling head 1 is fixedly connected with the mounting head 5, the top of the ring side of the mounting head 5 is installed with a sealing ring 6, the inner wall of the top cover 4 near the bottom of the mounting head 5 is provided with a block groove 7, the outer side of the top cover 4 corresponding to the block groove 7 is connected with a pull rod groove 8, a first spring 9 is installed in the block groove 7, the first spring 9 is installed with a block 10 near the opening side of the block groove 7, the end of the block 10 near the pull rod groove 8 is fixedly connected with a pull rod 11, the lower part of the block 10 away from the first spring 9 is a curved surface, and the block 10 is elastically connected to the top cover 4 through the first spring 9, and needs to be disassembled When removing the top cover 4, the block 10 is retracted into the block groove 7 by the pull rod 11, so that the top cover 4 can be separated from the filling head 1. When installing the top cover 4, the top cover 4 is covered on the top of the filling head 1. When the curved surface of the block 10 abuts against the installation head 5, the block 10 is squeezed and retracted into the inside of the block groove 7 to overcome the elastic force of the first spring 9. When the block 10 moves to the bottom of the installation head 5, the first spring 9 makes the block 10 extend out of the block groove 7 and abut against the bottom of the installation head 5, so that the top cover 4 and the filling head 1 can be installed. The sealing structure of the filling head 1 is installed and connected to the top cover 4, and the sealing structure of the filling head 1 can be disassembled or installed through the top cover 4 that is easy to disassemble and assemble.

[0027] See also Figures 1 to 3 The guide rod 14 is in a rectangular column shape, and the outer dimensions of the guide rod 14 match the inner dimensions of the guide rod groove 13 . The outer diameter of the sealing plug 18 is larger than the inner diameter of the liquid outlet pipe 2 , and the outer diameter of the sealing plug 18 is smaller than the inner diameter of the filling head 1 .

[0028] Working principle: This is a sealing structure for a filling machine. When the filling head 1 is in the initial state, the sealing plug 18 blocks the liquid outlet pipe 2 through the second spring 16 to seal the liquid outlet pipe 2 of the filling head 1. When filling is required, the hydraulic pressure in the filling head 1 increases, pushing the piston 12 to overcome the second spring 16 and move upward, so that the sealing plug 18 opens the liquid outlet pipe 2, and filling is performed through the filling head 1. When the injection is stopped, the hydraulic pressure in the filling head 1 decreases, and the piston 12 is driven to move downward by the second spring 16, so that the sealing plug 18 blocks the liquid outlet pipe 2 again. Through the sealing structure of the filling head 1, the filling head 1 can be automatically opened and closed according to the filling state, which effectively improves the practicality of the sealing structure of the filling head 1.

[0029] When it is necessary to remove the top cover 4, the pull rod 11 drives the block 10 to retract into the block groove 7, so that the top cover 4 can be separated from the filling head 1. When installing the top cover 4, the top cover 4 is covered on the top of the filling head 1. When the curved surface of the block 10 abuts against the installation head 5, the block 10 is squeezed and retracts into the inside of the block groove 7 to overcome the elastic force of the first spring 9. When the block 10 moves to the bottom of the installation head 5, the first spring 9 makes the block 10 extend out of the block groove 7 and abut against the bottom of the installation head 5, so that the top cover 4 and the filling head 1 can be installed. The sealing structure of the filling head 1 is installed and connected to the top cover 4, and the sealing structure of the filling head 1 can be disassembled or installed through the top cover 4 that is easy to disassemble and assemble.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing structure for a filling machine, comprising a filling head (1), characterized in that: The bottom end of the filling head (1) is connected to a liquid outlet pipe (2), and the side of the filling head (1) close to the middle is connected to a liquid inlet pipe (3), wherein: A top cover (4) is installed at the top of the filling head (1), and the top cover (4) is connected to the filling head (1) through a quick disassembly mechanism. A piston (12) is arranged on the inner side of the filling head (1) near the top of the liquid inlet pipe (3). A guide rod groove (13) runs through the middle of the top cover (4), and a guide rod (14) runs through the guide rod groove (13). The bottom end of the guide rod (14) is fixedly connected to the piston (12); The end of the guide rod (14) close to the top cover (4) is fixedly connected to a baffle (15); a second spring (16) is sleeved on the guide rod (14) between the piston (12) and the top cover (4); a support rod (17) is fixedly connected to the middle of the bottom end of the piston (12); and a sealing plug (18) is fixedly connected to the bottom end of the support rod (17) close to the liquid outlet pipe (2).

2. The sealing structure for a filling machine according to claim 1, characterized in that: The quick disassembly and assembly mechanism comprises an installation head (5), the top end of the filling head (1) is fixedly connected to the installation head (5), the top of the ring side of the installation head (5) is installed with a sealing ring (6), the inner wall of the top cover (4) near the bottom of the installation head (5) is provided with a block groove (7), the outer side of the top cover (4) corresponding to the block groove (7) is connected to a pull rod groove (8), a first spring (9) is installed in the block groove (7), a block (10) is installed on the opening side of the first spring (9) near the block groove (7), and the end of the block (10) near the pull rod groove (8) is fixedly connected with a pull rod (11).

3. The sealing structure for a filling machine according to claim 2, characterized in that: The lower part of the clamping block (10) away from the first spring (9) is a curved surface, and the clamping block (10) is elastically connected to the top cover (4) via the first spring (9).

4. The sealing structure for a filling machine according to claim 1, characterized in that: The guide rod (14) is in the shape of a rectangular column, and the external dimensions of the guide rod (14) coincide with the internal dimensions of the guide rod groove (13).

5. The sealing structure for a filling machine according to claim 1, characterized in that: The outer diameter of the sealing plug (18) is greater than the inner diameter of the liquid outlet pipe (2), and the outer diameter of the sealing plug (18) is smaller than the inner diameter of the filling head (1).

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