Pressure constant mechanism based on time control type liquid filling valve

Abstract

The utility model discloses a constant pressure mechanism based on a time control type liquid filling valve, which solves the problem that the filling precision is greatly influenced due to irregular nonlinear change of the outlet flow velocity of the existing filling valve, and comprises a liquid storage tank and a filling head assembly, and one side of the bottom of the liquid storage tank is communicated with the filling head assembly through a liquid inlet pipe; the filling head assembly comprises a measuring cup, a measuring cup upper end cover, a measuring cup bottom cover, a filling nozzle and a filling pull rod; the upper part of the measuring cup is in threaded connection with the upper end cover of the measuring cup, the lower part of the measuring cup is in threaded connection with the bottom cover of the measuring cup, and the lower part of the bottom cover of the measuring cup is in threaded connection with the filling nozzle; the filling pull rod is arranged in the measuring cup and penetrates through the measuring cup upper end cover and the measuring cup bottom cover, and the upper end of the filling pull rod is connected with the telescopic end of the air cylinder through a connecting sleeve. According to the utility model, the influence of external liquid on the filling valve port is blocked in the filling process, and the flow velocity change approaches to regular linear change, so that the filling precision is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid filling, in particular to a pressure constant mechanism based on a time-controlled liquid filling valve. Background Art

[0002] Among existing liquid filling technologies, time-controlled filling valves are a common filling method. Their working principle is to regulate the filling volume by precisely controlling the valve opening time. However, in actual applications, due to the influence of various factors, such as changes in liquid pressure in the pipeline, fluctuations in the liquid level in the storage tank, changes in the liquid level, and the centripetal force generated during the rotation of the filling machine, the flow rate at the filling valve outlet can exhibit irregular, nonlinear changes. This flow rate instability directly affects filling accuracy, especially in high-precision filling processes, where errors can reach ±10-20ml / 500ml, which is unacceptable for many industries.

[0003] Furthermore, traditional filling methods are susceptible to environmental influences such as temperature and humidity, which can also adversely affect filling accuracy. Therefore, it is particularly important to develop a constant pressure mechanism that can stably control the filling flow rate and improve filling accuracy. Utility Model Content

[0004] The utility model provides a pressure constant mechanism based on a time-controlled liquid filling valve, which solves the technical problem that the outlet flow rate of the existing filling valve changes irregularly and nonlinearly, greatly affecting the filling accuracy.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] The present application provides a pressure constant mechanism based on a time-controlled liquid filling valve, comprising a liquid storage tank and a filling head assembly, wherein one side of the bottom of the liquid storage tank is connected to the filling head assembly through a liquid inlet pipe;

[0007] The filling head assembly includes a measuring cup, an upper end cover of the measuring cup, a bottom cover of the measuring cup, a filling nozzle, a filling pull rod, a cylinder, a filling plug, a filling plug silicone head and a vent tube; wherein,

[0008] The upper part of the measuring cup is threadedly connected to the upper end cover of the measuring cup, the lower part of the measuring cup is threadedly connected to the bottom cover of the measuring cup, and the lower part of the bottom cover of the measuring cup is threadedly connected to the filling nozzle; the filling rod is arranged in the measuring cup and passes through the upper end cover and the bottom cover of the measuring cup, the upper end of the filling rod is connected to the telescopic end of the cylinder through a connecting sleeve, the telescopic end of the cylinder is outer-circuited with a cylinder return spring, the lower end of the cylinder body is connected to the cylinder mounting plate by bolts, the lower end of the filling rod is connected to the filling plug, and the filling plug is connected to the filling plug silicone head; a piston ball head is welded on the filling rod, and the piston ball head is located below the upper end cover of the measuring cup;

[0009] A liquid inlet is provided on the side of the upper end cover of the measuring cup, and an air vent is provided on the upper surface of the upper end cover of the measuring cup. The liquid inlet pipe is connected to the liquid inlet through a liquid inlet pipe screw sleeve, one end of the air vent is connected to the air vent through a air vent pipe screw sleeve, and the other end of the air vent is connected to the upper part of the liquid storage tank.

[0010] Furthermore, a measuring cup silicone O-ring is installed at the threaded connection between the upper part of the measuring cup and the upper end cover of the measuring cup, and a measuring cup silicone O-ring is also installed at the threaded connection between the lower part of the measuring cup and the bottom cover of the measuring cup; a filling nozzle silicone O-ring is installed at the threaded connection between the lower part of the bottom cover of the measuring cup and the filling nozzle.

[0011] Furthermore, the piston ball head outer shell is provided with a piston silicone head.

[0012] Furthermore, a liquid inlet tube silicone O-ring is installed at the connection between the liquid inlet tube and the upper end cover of the measuring cup, and a ventilation tube silicone O-ring is installed at the connection between the ventilation tube and the upper end cover of the measuring cup.

[0013] Furthermore, a rod guide sleeve is provided on the filling rod, and the rod guide sleeve is located on the upper surface of the upper end cover of the measuring cup. A rod guide sleeve silicone O-ring is installed at the connection between the rod guide sleeve and the upper end cover of the measuring cup. A guide sleeve nut is provided on the rod guide sleeve, and a rod silicone O-ring is installed between the rod guide sleeve and the guide sleeve nut.

[0014] Furthermore, a cylinder support rod is provided between the cylinder mounting plate and the upper end cover of the measuring cup.

[0015] Furthermore, a liquid level float switch is provided in the liquid storage tank.

[0016] Beneficial effects achieved by this utility model:

[0017] (1) The utility model provides a constant pressure mechanism based on a time-controlled liquid filling valve, which integrates a storage cup on each filling valve to block the influence of external liquid on the filling valve port during the filling process, so that the flow rate change approaches a regular linear change, thereby greatly improving the filling accuracy and stability (about ±1.5ML / 500ML), significantly reducing the liquid waste caused by filling errors, and reducing production costs. Due to the stable control of the flow rate, the utility model can significantly reduce the filling errors caused by flow rate changes and improve the filling accuracy. This has important practical significance for industries that require high-precision filling.

[0018] (2) The pressure constant mechanism based on the time-controlled liquid filling valve provided by the utility model has a flexible design and can adapt to different types of liquids and different filling requirements. At the same time, it has a compact structure and is easy to operate, making it easy to modify and upgrade existing filling equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the utility model during fluid replenishment;

[0020] Figure 2 This is a schematic diagram of the structure of the utility model during filling;

[0021] Figure 3 This is a cross-sectional view of the filling head assembly of the present invention;

[0022] Figure 4 This is an exploded view of the filling head assembly of the utility model.

[0023] Reference numerals:

[0024] 1. Liquid storage tank; 2. Filling head assembly; 3. Liquid inlet pipe; 4. Liquid level float switch; 5. Measuring cup; 6. Measuring cup upper cover; 7. Measuring cup bottom cover; 8. Measuring cup silicone O-ring; 9. Filling nozzle; 10. Filling nozzle silicone O-ring; 11. Filling rod; 12. Cylinder; 13. Connecting sleeve; 14. Cylinder return spring; 15. Cylinder mounting plate; 16. Filling plug; 17. Filling plug silicone head; 18. Piston ball joint; 19. Piston silicone head; 20. Vent tube; 21. Vent tube screw sleeve; 22. Liquid inlet pipe screw sleeve; 23. Liquid inlet pipe silicone O-ring; 24. Vent tube silicone O-ring; 25. Tie rod guide sleeve; 26. Tie rod guide sleeve silicone O-ring; 27. Guide sleeve nut; 28. Tie rod silicone O-ring; 29. Cylinder support rod.

[0025] The accompanying drawings are for illustrative purposes only and should not be construed as limitations on this patent. To better illustrate this embodiment, some components of the accompanying drawings may be omitted, enlarged, or reduced in size and do not represent the actual dimensions of the product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted from the accompanying drawings. The same or similar reference numerals correspond to the same or similar components. The terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limitations on this patent. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] The technical solution of the present invention is described in detail below with reference to the accompanying drawings.

[0028] like Figure 3-Figure 4 As shown, a pressure constant mechanism based on a time-controlled liquid filling valve includes a liquid storage tank 1 and a filling head assembly 2. The bottom side of the liquid storage tank 1 is connected to the filling head assembly 2 through a liquid inlet pipe 3; the filling head assembly 2 includes a measuring cup 5, a measuring cup upper end cover 6, a measuring cup bottom cover 7, a filling nozzle 9, a filling rod 11, a cylinder 12, a filling plug 16, a filling plug silicone head 17, and a vent tube 20.

[0029] The upper portion of the measuring cup 5 is threadedly connected to the measuring cup upper end cover 6, and a measuring cup silicone O-ring 8 is installed at the threaded connection between the upper portion of the measuring cup 5 and the measuring cup upper end cover 6. The lower portion of the measuring cup 5 is threadedly connected to the measuring cup bottom cover 7, and a measuring cup silicone O-ring 8 is installed at the threaded connection between the lower portion of the measuring cup 3 and the measuring cup bottom cover 7. The lower portion of the measuring cup bottom cover 7 is threadedly connected to the filling nozzle 9, and a filling nozzle silicone O-ring 10 is installed at the threaded connection between the lower portion of the measuring cup bottom cover 7 and the filling nozzle 9.

[0030] The filling rod 11 is arranged in the measuring cup 5 and passes through the upper end cover 6 and the bottom cover 7 of the measuring cup. The upper end of the filling rod 11 is connected to the telescopic end of the cylinder 12 through a connecting sleeve 13. The telescopic end of the cylinder 12 is covered with a cylinder return spring 14. The lower end of the body of the cylinder 12 is connected to the cylinder mounting plate 15 by bolts. The lower end of the filling rod 11 is connected to the filling plug 16, and the filling plug 16 is connected to the filling plug silicone head 17; a piston ball head 18 is welded on the filling rod 11, and the piston ball head 18 is located below the upper end cover 6 of the measuring cup; a piston silicone head 19 is covered on the piston ball head 18.

[0031] A liquid inlet is provided on the side of the measuring cup upper end cover 6 , and an air vent is provided on the upper surface of the measuring cup upper end cover 6 . The liquid inlet pipe 3 is connected to the liquid inlet through the liquid inlet pipe screw sleeve 22 , and the air vent pipe 20 is connected to the air vent through the air vent pipe screw sleeve 21 .

[0032] In order to ensure the sealing of the liquid inlet and the air permeability, a liquid inlet silicone O-ring 23 is installed at the connection between the liquid inlet pipe 3 and the upper end cover 6 of the measuring cup, and a air permeability silicone O-ring 24 is installed at the connection between the air permeability pipe 20 and the upper end cover 6 of the measuring cup.

[0033] In order to ensure that the filling rod 11 moves linearly in the vertical direction, a rod guide sleeve 25 is provided on the filling rod 11. The rod guide sleeve 25 is located on the upper surface of the measuring cup upper end cover 6. A rod guide sleeve silicone O-ring 26 is installed at the connection between the rod guide sleeve 25 and the measuring cup upper end cover 6. A guide sleeve nut 27 is provided on the rod guide sleeve 25, and a rod silicone O-ring 28 is installed between the rod guide sleeve 25 and the guide sleeve nut 27.

[0034] In order to facilitate support and ensure that the head of the cylinder 12 can remain stable during operation, a cylinder support rod 29 is provided between the cylinder mounting plate 15 and the measuring cup upper end cover 6.

[0035] The liquid storage tank 1 is provided with a liquid level float switch 4, the function of which is to monitor and control the liquid height in the liquid storage tank. Its working principle is based on the change in the buoyancy of the float. Specifically, when the liquid level in the liquid storage tank rises, the float will also rise; and when the liquid level drops, the float will drop. This position change will be detected by the sensing mechanism inside the liquid level float switch and converted into a corresponding electrical signal output. When the liquid in the liquid storage tank drops to the preset minimum liquid level, the liquid level float switch will send a signal, triggering the external device of the mechanism to operate and replenish the liquid in the liquid storage tank; as the liquid is replenished, the liquid level in the liquid storage tank rises, and the float also rises. When the preset maximum liquid level is reached, the liquid level float switch sends a signal again to stop the replenishment process. In this way, the liquid level float switch can realize automatic control of the liquid height in the liquid storage tank and ensure the stable operation of the equipment.

[0036] The following is a detailed description of the operation of the above-mentioned constant pressure mechanism based on the time-controlled liquid filling valve:

[0037] See also Figure 1 When replenishing liquid in the measuring cup, start the cylinder, which drives the filling rod to move downward. A vent is formed between the piston ball head on the filling rod and the upper end cover of the measuring cup. The liquid in the liquid storage tank enters the measuring cup from the liquid inlet pipe. The filling plug at the lower end of the filling rod blocks the filling nozzle as the filling rod moves downward, preventing liquid from flowing out of the filling nozzle during replenishment.

[0038] See also Figure 2 During filling, the container to be canned is placed under the filling nozzle, the cylinder is started, and the cylinder drives the filling rod to move upward. The piston ball head set on the filling rod is lifted to block the liquid inlet channel, and the filling plug at the lower end of the filling rod moves upward, the filling nozzle is opened, and filling is carried out.

[0039] The serial numbers of the embodiments of this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are only preferred embodiments of this application and do not limit the scope of the patent of this application. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the scope of patent protection of this application.

Claims

1. A constant pressure mechanism based on a time-controlled liquid filling valve, characterized in that: It comprises a liquid storage tank (1) and a filling head assembly (2), wherein one side of the bottom of the liquid storage tank (1) is connected to the filling head assembly (2) via a liquid inlet pipe (3); The filling head assembly (2) comprises a measuring cup (5), a measuring cup upper end cover (6), a measuring cup bottom cover (7), a filling nozzle (9), a filling pull rod (11), a cylinder (12), a filling plug (16), a filling plug silicone head (17) and a vent tube (20); wherein, The upper portion of the measuring cup (5) is threadedly connected to the upper end cover (6) of the measuring cup, the lower portion of the measuring cup (5) is threadedly connected to the bottom cover (7) of the measuring cup, and the lower portion of the bottom cover (7) of the measuring cup is threadedly connected to the filling nozzle (9); the filling rod (11) is arranged in the measuring cup (5) and passes through the upper end cover (6) and the bottom cover (7) of the measuring cup, the upper end of the filling rod (11) is connected to the telescopic end of the cylinder (12) through the connecting sleeve (13), and the cylinder ( The telescopic end of the cylinder (12) is provided with a cylinder return spring (14), the lower end of the body of the cylinder (12) is connected to the cylinder mounting plate (15) by bolts, the lower end of the filling rod (11) is connected to the filling plug (16), and the filling plug (16) is connected to the filling plug silicone head (17); a piston ball head (18) is welded to the filling rod (11), and the piston ball head (18) is located below the upper end cover (6) of the measuring cup; A liquid inlet is provided on the side of the measuring cup upper end cover (6), and a vent is provided on the upper surface of the measuring cup upper end cover (6). The liquid inlet pipe (3) is connected to the liquid inlet via a liquid inlet pipe screw sleeve (22), one end of the vent pipe (20) is connected to the vent via a vent pipe screw sleeve (21), and the other end of the vent pipe (20) is connected to the upper part of the liquid storage tank (1).

2. A pressure constant mechanism based on a time-controlled liquid filling valve according to claim 1, characterized in that: A measuring cup silicone O-ring (8) is installed at the threaded connection between the upper portion of the measuring cup (5) and the measuring cup upper end cover (6), and a measuring cup silicone O-ring (8) is also installed at the threaded connection between the lower portion of the measuring cup (5) and the measuring cup bottom cover (7); and a filling nozzle silicone O-ring (10) is installed at the threaded connection between the lower portion of the measuring cup bottom cover (7) and the filling nozzle (9).

3. The constant pressure mechanism based on a time-controlled liquid filling valve according to claim 1, characterized in that: The outer cover of the piston ball head (18) is provided with a piston silicone head (19).

4. The constant pressure mechanism based on a time-controlled liquid filling valve according to claim 1, characterized in that: A liquid inlet pipe silicone O-ring (23) is installed at the connection between the liquid inlet pipe (3) and the upper end cover (6) of the measuring cup, and a vent pipe silicone O-ring (24) is installed at the connection between the vent pipe (20) and the upper end cover (6) of the measuring cup.

5. The constant pressure mechanism based on a time-controlled liquid filling valve according to claim 1, characterized in that: The filling rod (11) is provided with a rod guide sleeve (25), the rod guide sleeve (25) is located on the upper surface of the measuring cup upper end cover (6), a rod guide sleeve silicone O-ring (26) is installed at the connection between the rod guide sleeve (25) and the measuring cup upper end cover (6), a guide sleeve nut (27) is provided on the rod guide sleeve (25), and a rod silicone O-ring (28) is installed between the rod guide sleeve (25) and the guide sleeve nut (27).

6. The constant pressure mechanism based on a time-controlled liquid filling valve according to claim 1, characterized in that: A cylinder support rod (29) is provided between the cylinder mounting plate (15) and the measuring cup upper end cover (6).

7. The constant pressure mechanism based on a time-controlled liquid filling valve according to claim 1, characterized in that: A liquid level float switch (4) is provided in the liquid storage tank (1).

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