A high-precision batching valve with a master-slave valve structure

Abstract

This application discloses a high-precision dispensing valve with a master-slave valve structure, relating to the field of dispensing technology. It includes a master valve assembly, a slave valve assembly, and a pull plate. The master valve assembly includes a master valve body, a master valve seat, a master valve stem, and a master plug. The top of the master valve stem slides through the pull plate, and a first pull plate is fixedly mounted on the top of the master valve stem. The slave valve assembly includes a slave valve body, a slave valve seat, a slave valve stem, and a slave plug. The top of the slave valve stem is fixedly connected to the pull plate. This application utilizes a master-slave valve for dispensing. For small-flow dispensing, a cylinder moves the pull plate upwards to the first position, opening the slave valve independently. For large-flow dispensing, the cylinder moves the pull plate upwards to the second position, opening both the slave and master valves simultaneously, thus making small-flow dispensing more precise.

Description

Technical Field

[0001] This application relates to the field of batching technology, and in particular to a high-precision batching valve with a master-slave valve structure. Background Technology

[0002] High-precision dispensing valves are core actuators in industrial automation processes, used for precise and reliable control of the addition of trace or low-flow materials. They are designed for extremely fine and repeatable flow regulation of media such as liquids, powders, or gases in continuous or intermittent production. They are widely used in industries with stringent requirements for formulation ratios, such as pharmaceuticals, food and beverage, fine chemicals, electronic materials, battery manufacturing, and laboratory automation.

[0003] Patent document CN119425496B discloses a high-precision dispensing device, which consists of a three-position cylinder and a three-stage conical switching valve. The opening and closing of the three-stage conical valve is mainly controlled by the three positions of the cylinder. When controlling a small flow rate, the cylinder moves to the first position, lifting the plug and opening the first-stage valve. When controlling a medium flow rate, the cylinder moves to the second position, and the plug, via a pull rod and a first pull plate structure, lifts the first plug ring, opening the second-stage valve. When controlling a large flow rate, the cylinder moves to the third position, and the plug, via a pull rod and a first pull plate structure, lifts the second plug ring, opening the third-stage valve.

[0004] When dispensing high-viscosity materials at low flow rates, the pull rods and first pull plate structure around the plug affect the flow of the material, reducing the accuracy of low-flow dispensing. Utility Model Content

[0005] To improve the accuracy of low-flow batching, this application provides a high-precision batching valve with a master-slave valve structure.

[0006] The high-precision batching valve with a master-slave valve structure provided in this application adopts the following technical solution:

[0007] A high-precision dispensing valve with a master-slave valve structure includes a master valve assembly, at least one slave valve assembly, and a pull plate fixedly connected to a cylinder drive rod. The master valve assembly includes a master valve body, a master valve seat, a master valve stem, and a master plug. The master valve body has a feed inlet, the master valve seat is located at the bottom of the master valve body, the master valve stem is slidably disposed within the master valve seat, the master plug is located at the bottom end of the master valve stem, the top of the master valve stem slides through the pull plate, and a first pull plate is fixedly disposed at the top end of the master valve stem. The slave valve assembly includes a slave valve body, a slave valve seat, a slave valve stem, and a slave plug. The slave valve body is disposed on the side wall of the master valve body and communicates with the inner cavity of the master valve body. The slave valve seat is located at the bottom of the slave valve body, the slave valve stem is slidably disposed within the slave valve seat, the slave plug is located at the bottom end of the slave valve stem, and the top end of the slave valve stem is fixedly connected to the pull plate.

[0008] By adopting the above technical solution, the material enters the mother valve body and daughter valve body through the feed inlet. When the cylinder drives the pull plate upward to the first position, the pull plate drives the daughter plug upward through the daughter valve rod, thereby opening the primary valve and performing small-flow dispensing. At this time, the pull plate slides on the mother valve rod and does not drive the mother valve rod to move. When the cylinder drives the pull plate upward to the second position, the pull plate drives the mother valve rod upward through the first pull plate, thereby opening the secondary valve and performing large-flow dispensing. With this setting, using a mother and daughter valve for dispensing, the daughter valve opens alone during small-flow dispensing, and the daughter valve and mother valve open simultaneously during large-flow dispensing, thus making small-flow dispensing more precise.

[0009] Preferably, the mother valve body has a first flow hole, the daughter valve body has a second flow hole, the daughter valve body is detachably mounted on the mother valve body, and the first flow hole communicates with the second flow hole.

[0010] By adopting the above technical solution, the material in the mother valve body flows into the daughter valve body through the first flow hole and the second flow hole. The daughter valve body can be detachably installed on the mother valve body, which facilitates the maintenance and replacement of the daughter valve assembly.

[0011] Preferably, a sealing ring is provided on the outer wall of the mother valve body and on the outer periphery of the first flow hole, and the daughter valve body abuts against the sealing ring on the side away from the mother valve body.

[0012] By adopting the above technical solution, the sealing ring seals the connection between the sub-valve body and the mother valve body, making it difficult for materials to leak from the connection between the sub-valve body and the mother valve body.

[0013] Preferably, a mounting base is fixedly provided on the outer side wall of the mother valve body, and a mounting plate is fixedly provided on the outer side wall of the daughter valve body. A fixing member is provided on the mounting plate, and the fixing member is detachably and fixedly connected to the mounting base.

[0014] By adopting the above technical solution, when installing the sub-valve body, the fixing component is fixedly installed in the mounting base. The fixing component fixes the sub-valve body to the mother valve body through the mounting plate. When disassembling the sub-valve body, the fixing component is removed from the mounting base, and the sub-valve body can be removed, thus facilitating quick assembly and disassembly of the sub-valve body.

[0015] Preferably, multiple mounting bases, mounting plates, and fasteners are provided, with multiple mounting bases located on both sides of the width direction of the first flow hole, multiple mounting plates located on both sides of the width direction of the second flow hole, and multiple fasteners provided on multiple mounting plates.

[0016] By adopting the above technical solution, multiple sets of mounting seats, mounting plates and fasteners are used to fix the sub-valve body during installation, thereby making the sub-valve body more firmly fixed on the mother valve body.

[0017] Preferably, there are two sub-valve assemblies. The sub-valve stem of the first sub-valve assembly is fixedly connected to the pull plate. The top of the sub-valve stem of the second sub-valve assembly slides through the pull plate. A second pull plate is fixedly installed on the top of the sub-valve stem of the second sub-valve assembly. The height of the second pull plate is less than the height of the first pull plate.

[0018] By adopting the above technical solution, when the cylinder drives the pull plate to move upward to the first position, the pull plate drives the sub-plug to move upward through the first sub-valve rod, opening the first-stage valve and performing small-flow dispensing. When the cylinder drives the pull plate to move upward to the second position, the pull plate drives the second sub-valve rod to move through the second pull plate, and the second sub-valve rod drives the sub-plug to move upward, opening the second-stage valve and performing medium-flow dispensing. When the cylinder drives the pull plate to move upward to the third position, the pull plate drives the mother valve rod to move upward through the first pull plate, opening the third-stage valve and performing large-flow dispensing, thereby achieving three-stage dispensing.

[0019] In summary, this application includes at least one of the following beneficial technical effects:

[0020] 1. Using a master and slave valve for batching: When batching at a small flow rate, the cylinder moves the pull plate upward to the first position, and the slave valve opens independently. When batching at a large flow rate, the cylinder moves the pull plate upward to the second position, and the slave valve and the master valve open simultaneously, thus making the batching at a small flow rate more accurate.

[0021] 2. The connection between the sub-valve body and the main valve body is sealed with a sealing ring to prevent material from leaking from the connection between the sub-valve body and the main valve body;

[0022] 3. By setting two sub-valve assemblies, when the cylinder drives the pull plate to move upward to the first position, the pull plate drives the sub-plug to move upward through the first sub-valve rod, opening the first-stage valve and performing small-flow dispensing. When the cylinder drives the pull plate to move upward to the second position, the pull plate drives the second sub-valve rod to move through the second pull plate, and the second sub-valve rod drives the sub-plug to move upward, opening the second-stage valve and performing medium-flow dispensing. When the cylinder drives the pull plate to move upward to the third position, the pull plate drives the mother valve rod to move upward through the first pull plate, opening the third-stage valve and performing large-flow dispensing, thus achieving three-stage dispensing. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the high-precision batching valve with a master-slave valve structure in Embodiment 1 of this application;

[0024] Figure 2 This is a cross-sectional view of the overall structure of the high-precision batching valve with a master-slave valve structure in Embodiment 1 of this application;

[0025] Figure 3This is an exploded view of the overall structure of the high-precision dispensing valve with a master-slave valve structure in Embodiment 1 of this application, highlighting the first flow hole;

[0026] Figure 4 This is an exploded view of the overall structure of the high-precision dispensing valve with a master-slave valve structure in Embodiment 1 of this application, highlighting the second flow hole;

[0027] Figure 5 This is a schematic diagram of the overall structure of the high-precision batching valve with a master-slave valve structure in Embodiment 2 of this application.

[0028] Reference numerals: 1. Female valve assembly; 11. Female valve body; 12. Female valve seat; 13. Female valve stem; 14. Female plug; 2. Female valve assembly; 21. Female valve body; 22. Female valve seat; 23. Female valve stem; 24. Female plug; 3. Pull plate; 4. Feed inlet; 5. First pull plate; 6. First flow hole; 7. Second flow hole; 8. Sealing ring; 9. Mounting base; 15. Mounting plate; 16. Fixing component; 17. Second pull plate. Detailed Implementation

[0029] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0030] This application discloses a high-precision batching valve with a master-slave valve structure.

[0031] Example 1:

[0032] Reference Figure 1 A high-precision batching valve with a master-slave valve structure includes a master valve assembly 1, a slave valve assembly 2, and a pull plate 3. The slave valve assembly 2 is detachably mounted on the master valve assembly 1, and the pull plate 3 is fixedly connected to the drive rod of the cylinder.

[0033] Reference Figure 2 Specifically, the female valve assembly 1 includes a female valve body 11, a female valve seat 12, a female valve stem 13, and a female plug 14. The female valve body 11 has a feed port 4 on its side wall. The female valve seat 12 is fixedly installed at the bottom of the female valve body 11. The female valve stem 13 is slidably installed inside the female valve body 11. The female plug 14 is fixedly installed at the bottom end of the female valve stem 13. The top end of the female valve stem 13 slides through the pull plate 3, and a first pull plate 5 is fixedly installed at the top end of the female valve stem 13.

[0034] The sub-valve assembly 2 includes a sub-valve body 21, a sub-valve seat 22, a sub-valve stem 23, and a sub-plug 24. The sub-valve body 21 is detachably and fixedly installed on the side wall of the main valve body 11. The sub-valve seat 22 is fixedly installed at the bottom of the sub-valve body 21, the sub-valve stem 23 is slidably installed inside the sub-valve body 21, the sub-plug 24 is fixedly installed at the bottom end of the sub-valve stem 23, and the top end of the sub-valve stem 23 is fixedly connected to the pull plate 3.

[0035] Reference Figure 3 and Figure 4 The mother valve body 11 has a first flow hole 6 on the side near the daughter valve body 21, and the daughter valve body 21 has a second flow hole 7 on the side near the mother valve body 11. Two mounting seats 9 are fixedly installed on both sides of the mother valve body 11 in the width direction of the first flow hole 6, and two mounting plates 15 are fixedly installed on both sides of the daughter valve body 21 in the width direction of the second flow hole 7. The four mounting plates 15 correspond one-to-one with the four mounting seats 9.

[0036] Each mounting plate 15 is equipped with a fastener 16, which is detachably and fixedly installed in the mounting base 9. In this application, the fastener 16 can be a bolt. By rotating the fastener 16, the mounting plate 15 and the mounting base 9 can be fixed or disassembled, thereby allowing the sub-valve body 21 to be installed or disassembled, which facilitates the assembly and disassembly of the sub-valve body 21.

[0037] A sealing ring 8 is installed on the outer wall of the mother valve body 11, located on the outer periphery of the first flow hole 6. When the daughter valve body 21 is installed on the mother valve body 11, the first flow hole 6 communicates with the second flow hole 7, and the daughter valve body 21 is pressed against the sealing ring 8. The sealing ring 8 seals the connection between the daughter valve body 21 and the mother valve body 11, making it difficult for material to leak from the connection between the daughter valve body 21 and the mother valve body 11.

[0038] The implementation principle of a high-precision batching valve with a master-slave valve structure in this application embodiment is as follows: Material enters the master valve body 11 through the inlet 4, and the material in the master valve flows into the slave valve body 21 through the first flow hole 6 and the second flow hole 7. When the cylinder drives the pull plate 3 to move upward to the first position, the pull plate 3 drives the slave plug 24 to move upward through the slave valve rod 23, thereby opening the first-stage valve. At this time, the pull plate 3 slides on the master valve rod 13 and does not drive the master valve rod 13 to move, and the batching valve performs small-flow batching. When the cylinder drives the pull plate 3 to continue moving upward to the second position, the pull plate 3 drives the master valve rod 13 to move upward through the first pull plate 5, thereby opening the second-stage valve, and the batching valve performs large-flow batching. When using the master-slave valve structure for batching, only the slave valve is open during small-flow batching, and the slave valve and master valve are opened simultaneously during large-flow batching. This design makes the small-flow batching process more precise.

[0039] Example 2:

[0040] Reference Figure 5 The difference between this embodiment and Embodiment 1 is that two sub-valve assemblies 2 are installed, with the two sub-valve assemblies 2 spaced apart on the outer wall of the main valve body 11. The sub-valve stem 23 of the first sub-valve assembly 2 is fixedly connected to the pull plate 3. The sub-valve stem 23 of the second sub-valve assembly 2 slides through the pull plate 3, and a second pull plate 17 is fixedly installed at the top of the sub-valve stem 23 of the second sub-valve assembly 2, and the height of the second pull plate 17 is less than the height of the first pull plate 5.

[0041] The implementation principle of Embodiment 2 of this application is as follows: When the cylinder drives the pull plate 3 to move upward to the first position, the pull plate 3 drives the sub-plug 24 to move upward with the first sub-valve rod 23, so that the first-stage valve is opened and a small-flow dispensing operation is performed; when the cylinder drives the pull plate 3 to continue moving upward to the second position, the pull plate 3 drives the second sub-valve rod 23 to move through the second pull plate 17, and the sub-valve rod 23 drives the sub-plug 24 to move upward, opening the second-stage valve and performing medium-flow dispensing; when the cylinder drives the pull plate 3 to move upward to the third position, the pull plate 3 drives the mother valve rod 13 to move upward through the first pull plate 5, opening the third-stage valve and performing large-flow dispensing, thus realizing the three-stage dispensing function.

[0042] The above are merely optional embodiments of this disclosure and are not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A high-precision dispensing valve with a master-slave valve structure, characterized in that: The system includes a main valve assembly (1), at least one sub-valve assembly (2), and a pull plate (3) fixedly connected to a cylinder drive rod. The main valve assembly (1) includes a main valve body (11), a main valve seat (12), a main valve stem (13), and a main plug (14). The main valve body (11) is provided with a feed port (4). The main valve seat (12) is located at the bottom of the main valve body (11). The main valve stem (13) is slidably disposed within the main valve seat (12). The main plug (14) is located at the bottom end of the main valve stem (13). The top of the main valve stem (13) slides through the pull plate (3). 3) The top end is fixedly provided with a first pull plate (5). The sub-valve assembly (2) includes a sub-valve body (21), a sub-valve seat (22), a sub-valve stem (23) and a sub-plug (24). The sub-valve body (21) is provided on the side wall of the mother valve body (11). The sub-valve body (21) is connected to the inner cavity of the mother valve body (11). The sub-valve seat (22) is provided at the bottom of the sub-valve body (21). The sub-valve stem (23) is slidably provided in the sub-valve seat (22). The sub-plug (24) is provided at the bottom end of the sub-valve stem (23). The top end of the sub-valve stem (23) is fixedly connected to the pull plate (3).

2. The high-precision dispensing valve with a master-slave valve structure according to claim 1, characterized in that: The mother valve body (11) is provided with a first flow hole (6), and the daughter valve body (21) is provided with a second flow hole (7). The daughter valve body (21) is detachably mounted on the mother valve body (11), and the first flow hole (6) is connected to the second flow hole (7).

3. A high-precision dispensing valve with a master-slave valve structure according to claim 2, characterized in that: A sealing ring (8) is provided on the outer wall of the mother valve body (11) and on the outer periphery of the first flow hole (6), and the daughter valve body (21) abuts against the sealing ring (8) on the side away from the mother valve body (11).

4. A high-precision dispensing valve with a master-slave valve structure according to claim 2, characterized in that: A mounting base (9) is fixedly provided on the outer side wall of the mother valve body (11), and a mounting plate (15) is fixedly provided on the outer side wall of the daughter valve body (21). A fixing member (16) is provided on the mounting plate (15), and the fixing member (16) is detachably and fixedly connected to the mounting base (9).

5. A high-precision dispensing valve with a master-slave valve structure according to claim 4, characterized in that: Multiple mounting bases (9), mounting plates (15) and fasteners (16) are provided. Multiple mounting bases (9) are located on both sides of the width direction of the first flow hole (6), multiple mounting plates (15) are located on both sides of the width direction of the second flow hole (7), and multiple fasteners (16) are provided on multiple mounting plates (15).

6. A high-precision dispensing valve with a master-slave valve structure according to claim 1, characterized in that: The sub-valve assembly (2) is provided in two parts. The sub-valve rod (23) of the first sub-valve assembly (2) is fixedly connected to the pull plate (3). The top of the sub-valve rod (23) of the second sub-valve assembly (2) slides through the pull plate (3). A second pull plate (17) is fixedly installed on the top of the sub-valve rod (23) of the second sub-valve assembly (2). The height of the second pull plate (17) is less than the height of the first pull plate (5).

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