High-precision liquid batching valve

Abstract

The utility model discloses a high-precision liquid batching valve which is a combination valve and is characterized by comprising a liquid inlet pipe, a liquid outlet pipe, a large-flow valve and a small-flow valve, the large-flow valve is a three-way pneumatic valve and comprises a side liquid inlet channel and a bottom liquid outlet channel; the small flow valve is a backflow type pneumatic valve, and a backflow channel is arranged in the small flow valve. The large-flow valve and the small-flow valve are arranged side by side in an integrated mode. The backflow channel extends into the large-flow valve and is communicated with the bottom liquid outlet channel; the liquid inlet pipe is arranged on a liquid inlet channel on one side of the large-flow valve, and the liquid outlet pipe is arranged on a liquid outlet channel at the bottom of the large-flow valve. The large-flow valve and the small-flow valve are arranged in parallel, the two valves are controlled in a pneumatic combination mode, and accurate control and rapid adjustment of liquid flow are achieved.

Description

Technical Field

[0001] This utility model belongs to the technical field of dispensing valve devices, specifically relating to a high-precision liquid dispensing valve used in the production of pharmaceuticals, cosmetics, or food. Background Technology

[0002] In the pharmaceutical, cosmetic, or food industries, liquid dispensing systems often use a single flow control valve for dispensing, which is insufficient to meet the requirements for high-precision dispensing.

[0003] Currently, in many of these industries, high-precision liquid batching is still done manually, which cannot meet the needs of automated batching. To facilitate automated batching, some attempts have been made in the industry. For example, Chinese Patent CN212251151U, published on December 9, 2020, discloses a valve structure for precise addition of liquid raw materials, including: a valve body with multiple valve chambers, and a pressure port, a feed inlet, and a discharge port; a valve core assembly disposed within the valve chambers; when in a pressureless or first pressure-controlled state, the valve core assembly closes the discharge port; when in a second pressure-controlled state, the valve core assembly fully opens the discharge port, and the feed inlet communicates with the discharge port through the valve chamber; when in a third pressure-controlled state, the feed inlet communicates with the discharge port through the valve core assembly; and when in a fourth pressure-controlled state, the feed inlet and discharge port alternately close and communicate through the valve core assembly. However, this type of valve structure is cumbersome to control during use, and its complex structure makes it prone to damage. Utility Model Content

[0004] In view of this, this application provides a high-precision liquid dispensing valve, which is a combined valve with a large flow valve and a small flow valve arranged in parallel. The two valves are controlled by a pneumatic combination to achieve precise control and rapid adjustment of the liquid flow rate.

[0005] According to one aspect of this application, one embodiment provides a high-precision liquid dispensing valve, which is a combination valve including a high-flow valve, a low-flow valve, an inlet pipe, and an outlet pipe;

[0006] The high-flow valve is a three-way pneumatic valve, including a side inlet channel and a bottom outlet channel;

[0007] The low-flow valve is a reflux type pneumatic valve, and a reflux channel is provided inside the low-flow valve;

[0008] The high-flow valve and the low-flow valve are arranged side by side as a single unit;

[0009] The return channel extends into the high-flow valve and connects to the bottom outlet channel;

[0010] The inlet pipe is located on the side inlet channel of the high-flow valve, and the outlet pipe is located on the bottom outlet channel of the high-flow valve.

[0011] Furthermore, both the large-flow valve and the small-flow valve include a valve body, a valve core, a cylinder, a support rod, and a floating joint. The valve core is slidably mounted on the valve body, and a support rod is mounted on the valve body. A cylinder is mounted at the top of the support rod, and the piston head of the cylinder is connected to the valve core through the floating joint.

[0012] Furthermore, a number of sealing rings are provided between the valve core and the valve body.

[0013] Furthermore, the valve body of the high-flow-rate valve is an unequal-diameter three-way valve body.

[0014] Furthermore, the diameter of the return channel in the small flow valve is smaller than the diameter of the tee in the valve body of the large flow valve.

[0015] Furthermore, the high-flow-rate valve is equipped with an anti-backflow pipe at its return port.

[0016] Furthermore, the anti-backflow pipe is a bent pipe with its opening facing the direction of liquid flow.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. This utility model discloses a high-precision liquid dispensing valve, which combines a large-flow valve and a small-flow valve to achieve precise control and rapid adjustment of liquid flow, thereby meeting the needs of different dispensing methods.

[0019] 2. This utility model provides a high-precision liquid dispensing valve with a compact structure and flexible control action, which improves the stability and reliability of the dispensing system.

[0020] 3. The high-precision liquid dispensing valve of this utility model has an anti-backflow pipe design, which further improves the dispensing accuracy. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0022] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0023] In the diagram: 1. High flow valve; 2. Low flow valve; 3. Inlet pipe; 4. Outlet pipe; 5. Inlet channel; 6. Outlet channel; 7. Return channel; 8. Valve body; 9. Valve core; 10. Cylinder; 11. Support column; 12. Floating joint; 13. Sealing ring; 14. Anti-backflow pipe; 15. Valve core head. Detailed Implementation

[0024] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0025] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operational steps involved in each embodiment can also be rearranged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for clearly describing a particular embodiment and do not imply that they represent the necessary components and / or order.

[0026] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0027] Please refer to Figure 1 and Figure 2 According to one aspect of this application, one embodiment provides a high-precision liquid dispensing valve, which is a combination valve including a high-flow valve 1, a low-flow valve 2, an inlet pipe 3, and an outlet pipe 4.

[0028] Both the high-flow valve 1 and the low-flow valve 2 include a valve body 8, a valve core 9, a cylinder 10, a support rod 11, and a floating joint 12. The valve core 9 is slidably mounted on the valve body 8. Multiple sealing rings 13 are provided on the valve core 9 and / or inside the valve body 8. The sealing rings 13 include, but are not limited to, plug seals, guide rings, O-rings, oil seals, etc. The valve body 8 is provided with four support rods 11, which are located at the four corners of the valve body 8. A cylinder 10 is mounted at the top of the support rod 11. The piston head of the cylinder 10 is connected to the valve core 9 through the floating joint 12. The floating joint 12 can solve connection problems caused by vibration or installation errors, and reduce equipment failure and downtime.

[0029] The high-flow valve 1 is a three-way pneumatic valve. In its valve body 8, the three-way liquid passage includes a side liquid inlet 5 and a bottom liquid outlet 6. The side liquid inlet 5 is set with unequal diameter, and the diameter changes at the position where it connects with the bottom liquid outlet 6. When the valve core 9 is closed, the valve core 9 passes through the side liquid inlet 5 and the bottom liquid outlet is blocked by the valve core head 15. In order to prevent leakage, the valve core head 15 is made of rubber with sealing properties, such as silicone rubber, fluororubber, nitrile rubber, etc.

[0030] The small flow valve 2 is a reflux type pneumatic valve. Its valve body 8 is provided with an inlet channel and a reflux channel 7. The inlet channel is a blind channel, and the reflux channel 7 is interconnected at the end of the inlet channel. The valve core 9 of the small flow valve 2 is located at the end of the inlet channel. When the valve core 9 is closed, the valve core head 15 of the valve core 9 blocks the opening of the reflux channel 7. In order to prevent leakage, the valve core head 15 is made of rubber with sealing properties.

[0031] The inner diameter of the return channel 7 of the small flow valve 2 is smaller than the inner diameter of the inlet channel 5 and the outlet channel 6 of the large flow valve 1.

[0032] The return channel 7 of the small flow valve 2 extends in the opposite direction to the surface of the valve body 8, which can serve as a process hole for the return channel 7. At the same time, it facilitates cleaning of the return channel 7 during later use.

[0033] The large flow valve 1 and the small flow valve 2 are side by side and fastened together by fasteners, so that the liquid inlet channel 5 of the large flow valve 1 and the liquid inlet channel of the small flow valve 2 are connected to each other. In order to prevent liquid leakage, an O-ring is provided at the liquid inlet of the large flow valve 1 and the small flow valve 2.

[0034] The return channel 7 of the small flow valve 2 extends into the large flow valve 1 and connects to the bottom outlet channel 6. An anti-backflow pipe 14 is provided on the return channel 7 of the large flow valve 1. The anti-backflow pipe 14 is a bend and the opening of the anti-backflow pipe 14 faces the direction of liquid flow.

[0035] In some cases, the anti-backflow pipe 14 is misaligned with the return channel 7 to further control the flow rate of the liquid and improve the accuracy of the dispensing valve.

[0036] The inlet pipe 3 is installed on the side inlet channel 5 of the high flow valve 1, and the outlet pipe 4 is installed on the bottom outlet channel 6 of the high flow valve 2.

[0037] In some embodiments, the inlet pipe 3 is integrally formed with the valve body 8 of the high-flow valve 1.

[0038] In some embodiments, an adapter is provided between the outlet pipe 4 and the valve body 8 of the high-flow valve 1 to accommodate outlet pipes of different diameters.

[0039] This utility model discloses a high-precision liquid dispensing valve. When dispensing liquid, the liquid is first added coarsely through a high-flow-rate valve, and then precisely added through a low-flow-rate valve, achieving the purpose of fast addition speed and high precision.

[0040] This invention relates to a high-precision liquid dispensing valve, which is a combination valve. When adding large quantities of chemical raw materials, the high-flow-rate valve achieves the same dispensing speed as a conventional valve of the same diameter. For precise dispensing, the low-flow-rate valve and small-diameter return channel control the precise addition of chemical raw materials, achieving an accuracy of 1 gram. Since both the high-flow-rate and low-flow-rate valves are pneumatic, the dispensing speed is not affected while maintaining accuracy, and the cost and control reliability are lower than traditional methods.

[0041] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A high precision liquid dispensing valve, being a combination valve, characterized in that: It comprises a large flow valve (1), a small flow valve (2), an inlet pipe (3) and an outlet pipe (4). The large flow valve (1) is a three-way pneumatic valve, comprising a side inlet channel (5) and a bottom outlet channel (6). The small flow valve (2) is a reflux type pneumatic valve, and a reflux channel (7) is arranged in the small flow valve (2). The large flow valve (1) and the small flow valve (2) are arranged side by side. The reflux channel (7) extends into the large flow valve (1) and communicates with the bottom outlet channel (6). The inlet pipe (3) is arranged on the side inlet channel (5) of the large flow valve (1), and the outlet pipe (4) is arranged on the bottom outlet channel (6) of the large flow valve (1).

2. A high precision liquid dispensing valve according to claim 1, characterized in that: The large flow valve (1) and the small flow valve (2) each comprise a valve body (8), a valve core (9), a gas cylinder (10), a support rod (11) and a floating joint (12), the valve core (9) is arranged on the valve body (8) and can slide up and down, the support rod (11) is arranged on the valve body (8), the top end of the support rod (11) is provided with the gas cylinder (10), and the piston head of the gas cylinder (10) is connected with the valve core (9) through the floating joint (12).

3. A high precision liquid dispensing valve according to claim 2, wherein: A plurality of sealing rings (13) are arranged between the valve core (9) and the valve body (8).

4. A high precision liquid dispensing valve according to claim 2, wherein: The valve body (8) of the large flow valve (1) is a three-way valve body with different diameters.

5. A high precision liquid dispensing valve as defined in claim 1, wherein: The diameter of the reflux channel (7) in the small flow valve (2) is smaller than that of the three-way in the valve body (8) of the large flow valve (1).

6. A high precision liquid dispensing valve as defined in claim 1, wherein: An anti-backflow pipe (14) is arranged on the reflux channel (7) of the large flow valve (1).

7. A high precision liquid dispensing valve according to claim 6, wherein: The anti-backflow pipe (14) is a bent pipe, and the pipe opening is directed to the liquid flow direction.

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