Gas circuit control device based on single-seat anti-mixing valve
By setting up distribution components in the gas circuit control structure of a single-seat anti-mixing valve to coordinate the cylinder, the valve core operation problem caused by pressure fluctuations during CIP operation is solved, and the safety and stability of gas circuit control is improved.
Patent Information
- Application Number
- CN202422031672.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-21
AI Technical Summary
When using the air circuit control structure of a single-seat anti-mixing valve, especially during CIP operation, the pressure of the feed pipe has increased sharply due to the valve closing, which makes the valve core easily lifted, causing the material to flow back to the valve cavity/leakage cavity, causing the material and pipeline to be contaminated.
By providing a distribution assembly to coordinate the first cylinder, second cylinder and third cylinder of the single-seat anti-mixing valve, the piston of the first cylinder is automatically pressurized when the leakage chamber CIP is performed to prevent the valve core from being pushed up due to fluctuations in the leakage chamber pressure.
It effectively avoids valve core movement caused by changes in the pressure of the pipeline and valve chamber, prevents the material chamber and related pipelines from being contaminated by cleaning liquid, and improves the safety and stability of gas circuit control.
Smart Images
Figure CN222911395U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fluid equipment, in particular to a gas circuit control device based on a single-seat anti-mixing valve. Background Art
[0002] A single-seat anti-mixing valve is a type of pneumatically normally closed single-seat double-seal structure valve. There are two seals on the valve seat, and an isolated leakage cavity is formed between the upper and lower seals. Generally, two interfaces are provided in the leakage cavity for the cleaning liquid to flow through (flow in and out) during CIP. Each interface is equipped with a movable piston to close or open the interface when needed. When the valve is in the closed state, the leakage cavity is in communication with the atmosphere (both interfaces are in the open state). Compressed air is simultaneously connected to the piston chamber of the pneumatic actuator of the single-seat anti-mixing valve and the piston chamber of the leakage cavity. During control, the actions of the leakage cavity and the valve cavity are opposite. When the valve (valve cavity) opens, the leakage cavity closes; when the valve (valve cavity) closes, the leakage cavity opens. It is equivalent to constructing an interlocking action mechanism to prevent the material from leaking out of the leakage cavity when flowing through the valve cavity normally when the valve (valve cavity) is open. Thus, the single-seat anti-mixing valve can safely separate two different products or media during operation. One of them is usually CIP liquid (cleaning medium). Especially when applied to a valve array configuration, the pipelines connected to the upper and lower ports of the anti-mixing valve can flow different media. For the leakage cavity of the anti-mixing valve, when any one of the seals (upper or lower seal structure) is damaged, the medium in the chamber or pipeline on the side where the damaged seal structure is located can only be discharged into the leakage cavity, effectively avoiding the problem of contamination caused by the mixing of two media. Especially when one side of the medium is a product and the other side is a cleaning liquid, the safety of the isolation effect of the leakage cavity is particularly obvious.
[0003] As Figure 3 shown is a gas circuit control structure realized by using a single-seat anti-mixing valve. Among them, the valve 1' is connected to the feeding pipeline through its upper valve port and to the discharging pipeline through its lower valve port. The actuator of the valve 1' includes a cylinder 101'. The lower chamber of the piston is connected to the air source Q1' through the interface 1001' to push the piston rod to retract and open the valve 1'. Usually, a spring is arranged in the upper chamber of the piston, and the restoring force of the spring is used to push the piston rod to extend to close the valve 1'. At the same time, the cylinders at the two interfaces of the leakage cavity are also connected to the air source Q1.
[0004] When the structure is used for production, valve 1' is supplied with gas by the solenoid valve of the control cabinet, and cylinder 101' is opened while cylinders 102' and 103' are closed. Among them, the opening of cylinder 101' opens the main valve seat (single-seat anti-mixing valve), and the material flows from the upper opening of the valve cavity to the lower opening; the closing of cylinders 102' and 103' closes the leakage cavity to prevent material leakage. The interface controlled by cylinder 102' is connected to valve 2', and valve 2' is controlled to open and close by cylinder 201', and its valve cavity is connected to the cleaning liquid supply source Q3. The gas source interface of valve 2' is connected to gas source Q2.
[0005] When CIP (online cleaning) is required before or after production, valve 2' is supplied with gas by the solenoid valve of the control cabinet, and cylinder 201' opens valve 2'. After the liquid supply pipeline is connected, CIP cleaning liquid is supplied to the leakage chamber to clean the chamber and the interface.
[0006] However, when this type of control structure is used in daily applications, especially when performing CIP operations, the pressure in the feed pipeline increases sharply due to the closure of valve 1'. When the cleaning liquid flows in the leakage chamber, the valve core (valve 1') is easily pushed up due to the change in pipeline pressure, causing the material to flow back into the valve chamber / leakage chamber, resulting in the problem of material and pipeline contamination. Utility Model Content
[0007] The purpose of the utility model is to provide a gas circuit control device based on a single-seat anti-mixing valve to solve the above technical problems.
[0008] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:
[0009] A gas circuit control device based on a single-seat anti-mixing valve, comprising a device body, wherein the device body comprises a single-seat anti-mixing valve, an angle valve, and a distribution assembly, the single-seat anti-mixing valve is connected to the angle valve and the distribution assembly, the angle valve is used to supply cleaning fluid when the leakage cavity of the single-seat anti-mixing valve is cleaned, and the distribution assembly is used to pressurize the piston of the actuator of the single-seat anti-mixing valve when the leakage cavity of the single-seat anti-mixing valve is cleaned;
[0010] The single-seat anti-mixing valve has a first cylinder and a valve chamber, the valve chamber includes a material chamber and a leakage chamber, the first cylinder serves as an actuator of the single-seat anti-mixing valve, has a first interface and a second interface, the first interface is connected to the chamber above the piston of the first cylinder, the second interface is connected to the chamber below the piston of the first cylinder, the valve chamber has a third interface and a fourth interface, the third interface and the fourth interface are both connected to the leakage chamber, the third interface is provided with a second cylinder for controlling the opening and closing of the third interface, the fourth interface is provided with a third cylinder for controlling the opening and closing of the fourth interface,
[0011] The angle valve has a fourth cylinder, which is connected to a gas source. The fourth cylinder serves as the actuating structure of the angle valve for opening and closing the valve chamber of the angle valve. The valve chamber of the angle valve is connected to the third interface, and the fourth interface is set as a grounding interface for discharging the cleaning liquid or returning the cleaning liquid to the cleaning liquid supply end during the CIP process.
[0012] The first interface, the second interface, the second cylinder, and the third cylinder are all connected to the distribution assembly, and the distribution assembly is connected to a gas source.
[0013] The utility model controls the first cylinder, the second cylinder, and the third cylinder of the single-seat anti-mixing valve in a coordinated manner by setting a distribution assembly, so as to automatically pressurize the piston of the first cylinder during the CIP of the leakage chamber, prevent the valve core from being lifted due to the pressure fluctuation in the leakage chamber, and avoid the contamination of the material chamber and related pipelines by the cleaning liquid caused thereby.
[0014] Preferably, the distribution assembly includes a first control valve, and the first control valve is a solenoid valve with a two-position three-way structure, which has three interfaces, including two working interfaces and one gas source interface, and the gas source interface is connected to the gas source.
[0015] The first interface is connected to one of the two working interfaces of the first control valve, and the second interface, the second cylinder, and the third cylinder are all connected to the other interface of the two working interfaces of the first control valve.
[0016] Preferably, the fourth cylinder is connected to the gas source through the distribution assembly, connected to the gas source through the distribution assembly, and realizes air intake or air return after being controlled by the distribution assembly.
[0017] Preferably, the distribution assembly includes a first control valve and a second control valve. Both the first control valve and the second control valve adopt two-position three-way valves, and both have two working interfaces and one gas source interface. Among them, the gas source interface is connected to the gas source.
[0018] One working interface of the first control valve is connected to the first interface, and the other working interface is connected to the second interface and the third cylinder.
[0019] One working interface of the second control valve is connected to the second cylinder, and the other working interface is connected to the fourth cylinder.
[0020] Preferably, the valve chamber sealing structure of the single-seat anti-mixing valve is set as a conical upper seal and a radial lower seal structure.
[0021] Preferably, the valve chamber sealing structure uses a sealing member made of silica gel, fluororubber, or EPDM.
[0022] Preferably, the valve body of the single-seat anti-mixing valve and the outer shell bracket of the actuator are connected by a clamp to facilitate equipment maintenance more conveniently.
[0023] Beneficial effects: Due to the above technical solutions, the present utility model realizes a gas path control structure with relatively high safety, such that when cleaning the leakage chamber of the single-seat anti-mixing valve, it can effectively avoid the problem that the pipeline and valve chamber are contaminated due to the movement of the valve core caused by the pressure change in the pipeline and valve chamber. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 is the first structural schematic diagram of the present utility model;
[0025] Figure 2 is the second structural schematic diagram of the present utility model;
[0026] Figure 3 is an application schematic diagram of a single-seat anti-mixing valve in the prior art;
[0027] Figure 4 is a structural schematic diagram of the single-seat anti-mixing valve of the present utility model;
[0028] Figure 5 is based on Figure 4 a partial structural cross-sectional view of the structure;
[0029] Figure 6 is the working state schematic diagram of the single-seat anti-mixing valve of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0030] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below with reference to specific illustrations. It should be noted that the terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present utility model are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the term "comprising" or "having" and any variation thereof are intended to cover non-exclusive inclusion. For example, a product or device comprising a series of components or units does not necessarily have to be limited to those components or units clearly listed, but may include other components or units inherent to these products or devices that are not clearly listed.
[0031] Refer to Figure 1, A gas circuit control device based on a single-seat anti-mixing valve, including a device body. The device body includes a single-seat anti-mixing valve 1, an angle valve 2, and a distribution component. The single-seat anti-mixing valve 1 is connected to the angle valve 2 and the distribution component. The angle valve 2 is used to supply cleaning liquid during the cleaning of the leakage chamber of the single-seat anti-mixing valve 1, and the distribution component is used to pressurize the piston of the actuator of the single-seat anti-mixing valve during the cleaning of the leakage chamber of the single-seat anti-mixing valve.
[0032] As Figure 1 , Figure 4 , Figure 5 As shown, the single-seat anti-mixing valve has a first cylinder 101 and a valve cavity. The valve cavity is the inner cavity of the valve body 102. The valve cavity includes a material cavity 1001 and a leakage cavity 1002. The first cylinder 101 serves as the actuator of the single-seat anti-mixing valve 1 and has a first interface 1011 and a second interface 1012. The first interface 1011 communicates with the chamber above the piston of the first cylinder 101, and the second interface 1012 communicates with the chamber below the piston of the first cylinder 101. The valve cavity has a third interface 1021 and a fourth interface 1022, and both the third interface 1021 and the fourth interface 1022 communicate with the leakage cavity 1002. A second cylinder 103 for controlling the opening and closing of this interface is provided at the third interface 1013, and a third cylinder 104 for controlling the opening and closing of the fourth interface is provided at the fourth interface 1022.
[0033] As Figure 1 As shown, the angle valve has a fourth cylinder 201. The fourth cylinder 201 is connected to the gas source Q2. The fourth cylinder 201 serves as the actuator of the angle valve to open and close the valve cavity of the angle valve 2. The valve cavity of the angle valve 2 is connected to the third interface 1021. The fourth interface 1022 is set as a drain interface for discharging the cleaning liquid or returning the cleaning liquid to the cleaning liquid supply end during the CIP process. In addition, the inlet of the valve cavity of the angle valve 2 is also connected to the cleaning liquid supply source Q3 through a pipeline.
[0034] The first interface 1011, the second interface 1012, the second cylinder 103, and the third cylinder 104 are all connected to the distribution component, and the distribution component is connected to the gas source Q1.
[0035] It should be noted that the actuator of the single-seat anti-mixing valve of the present invention is the first cylinder 101, which has a piston cavity. The piston in the cavity divides the piston cavity into two independent chambers, namely the upper piston chamber and the lower piston chamber. The outer shell of the first cylinder 101 is provided with a first interface 1011 and a second interface 1012, both of which communicate with the piston cavity. Among them, the first interface 1011 communicates with the upper piston chamber above the piston, and the second interface 1012 communicates with the lower piston chamber below the piston. After they are respectively connected to the distribution component through pipelines, they alternately intake and exhaust air to drive the piston to move, thereby driving the valve core to move and realizing the opening and closing of the material cavity; As Figure 4As shown, the valve chamber further has a fifth interface 1061, a sixth interface 1062, and a seventh interface 1062, which are respectively used for the inlet and outlet of materials when flowing through the valve chamber.
[0036] In the present utility model, the first cylinder 101 and the fourth cylinder 201 are set as cylinders with a normally closed structure, and the second cylinder 103 and the third cylinder 104 are set as cylinders with a normally open structure. Among them, the first cylinder 101 realizes the piston movement through the air inlet and outlet control of the first interface 1011 and the second interface 1012. When the second cylinder 103 and the third cylinder 104 intake air, the third interface 1021 and the fourth interface 1022 are respectively closed. On the contrary, when returning air (inhaling), the third interface 1021 and the fourth interface 1022 are opened.
[0037] When the fourth cylinder 201 intakes air, it opens the valve chamber of the angle valve 2, that is, after the angle valve chamber is conducted, cleaning liquid is supplied to the third interface 1021.
[0038] In order to realize the control of the distribution component on the single-seat anti-mixing valve in the present utility model, so that when the leakage chamber is being cleaned, the piston is automatically pressurized, it can be set as follows: In some embodiments, the distribution component includes a first control valve. The first control valve is an electromagnetic valve with a two-position three-way structure, which has three interfaces, including two working interfaces and a gas source interface. The gas source interface is connected to the gas source.
[0039] The first interface is connected to one of the two working interfaces of the first control valve, and the second interface, the second cylinder, and the third cylinder are all connected to the other interface of the two working interfaces of the first control valve.
[0040] Specifically, the connection structure of the first control valve is set as follows: As Figure 1 shown, the control valve 301 has three interfaces, including two working interfaces and a gas source interface. The two working interfaces are respectively defined as port A and port B, and the gas source interface is defined as port P. The gas source Q1 is connected through port P. The first interface 1011 is connected to port A, and the second interface 1012 is connected to port B;
[0041] The second cylinder 103 and the third cylinder 104 are also connected to port B.
[0042] During operation, when port A returns air and port B supplies air, the second cylinder 103 and the third cylinder 104 close the third interface 1021 and the fourth interface 1022. At the same time, the first cylinder 101 controls the valve core to lift and then opens the feeding chamber for feeding; during CIP, when port A supplies air and port B returns air, the second cylinder 103 and the third cylinder 104 control the third interface 1021 and the fourth interface 1022 to open. After the angle valve 2 is opened, cleaning liquid is supplied to the leakage chamber.
[0043] The utility model has a simplified structure design and realizes the collaborative operation of air supply and air return for supplying air source (referring to cleaning liquid) to the leakage chamber during CIP. It can be set as follows: In some preferred embodiments, the fourth cylinder is connected to the air source through a distribution component, connected to the air source through the distribution component, and realizes air intake or air return after being controlled by the distribution component.
[0044] Specifically, when the fourth cylinder is set to intake air, it opens the control structure of the angle valve cavity, and its air chamber interface is connected to port A of the first control valve.
[0045] When the single-seat anti-mixing valve of the utility model performs CIP, in order to pressurize the piston of the first cylinder and ensure the safety of cleaning liquid supply at the same time, it can be set as follows: In some embodiments, the distribution component includes a first control valve and a second control valve. Both the first control valve and the second control valve adopt two-position three-way valves, and both have two working interfaces and one air source interface. Among them, the air source interface is connected to the air source.
[0046] One working interface of the first control valve is connected to the first interface, and the other working interface is connected to the second interface and the third cylinder.
[0047] One working interface of the second control valve is connected to the second cylinder, and the other working interface is connected to the fourth cylinder.
[0048] During operation, the cleaning liquid supply is not affected by the first control valve. Only the second control valve is used to construct the opening and closing of the pipeline during liquid supply. The second control valve realizes the collaborative opening and closing of the angle valve and the third interface. That is, when the second cylinder opens the third interface, the fourth cylinder controls the valve cavity of the angle valve to conduct and supply cleaning liquid to the third interface, thereby ensuring the safety and stability of the liquid supply process.
[0049] Specifically, as Figure 2 shown, the distribution component includes a valve control structure constructed by two two-position three-way solenoid valves. The two two-position three-way solenoid valves are respectively a control valve 301 and a control valve 302. Both the control valve 301 and the control valve 302 have three interfaces, including two working interfaces and one air source interface. The two working interfaces are respectively defined as port A and port B, and the air source interface is defined as port P. The control valve 301 is connected to the air source Q1 through port P, and the control valve 302 is connected to the air source Q2 through port P. The connection settings of each valve are as follows: The upper cavity of the piston of the first cylinder 101 is connected to port A of the control valve 301 through the first interface 1011, and the lower cavity of the piston is connected to port B of the control valve 301 through the second interface 1012. At the same time, the third cylinder 104 is also connected to port B of the control valve 301.
[0050] The second cylinder 103 is connected to port A of the control valve 302, and the fourth cylinder 201 is connected to port B of the control valve 302.
[0051] It should be noted that the gas sources Q1 and Q2 can be set as the same gas source.
[0052] In the present utility model, in order to further enhance the sealing performance of the single-seat anti-mixing valve, its valve cavity sealing structure can be set as a conical upper seal and a radial lower seal structure.
[0053] In some preferred embodiments, the valve cavity sealing structure adopts a seal made of silica gel, fluororubber or EPDM.
[0054] In order to increase the convenience of maintenance in the present utility model, the valve body of the single-seat anti-mixing valve and the outer shell bracket of the actuator can be connected by a clamp, so as to achieve more convenient disassembly and assembly, accelerate the maintenance or the replacement speed of the equipment structure, and reduce the maintenance difficulty.
[0055] Such as Figure 4 shown, the clamp 105 clamps the bracket structure between the valve body 102 and the first cylinder 101 to the outer wall of the upper valve seat of the valve body.
[0056] Such as Figure 6 shown, when the present utility model works, there are three working states of the single-seat anti-mixing valve, including the feeding state at the leftmost part of the figure, the cleaning state at the rightmost part of the figure, and the intermediate state in the middle. The intermediate state is between the feeding state and the cleaning state (or, it can also be considered that in this state, the medium flowing through the single-seat valve cavity is different from the medium flowing through the external pipeline connected to the lower port). Combining Figure 1 、 Figure 6 shown, in the feeding state, the B port of the control valve 301 supplies gas and the A port returns gas. The first cylinder 101 pushes up the spool of the single-seat anti-mixing valve to allow the material to flow through. At this time, the second cylinder 103 and the third cylinder 104 close the third interface 1021 and the fourth interface 1022; in the intermediate state, the A port of the control valve 301 supplies gas and the B port returns gas, and the spool closes the lower valve cavity; in the cleaning state, the A port of the control valve 301 is kept supplying gas and the B port returns gas. The second cylinder 103 and the third cylinder 104 are opened, and at the same time the fourth cylinder 201 opens the angle valve 2, and the cleaning liquid flows through the leakage cavity.
[0057] In summary, the present utility model sets a distribution component to coordinately control the first cylinder, the second cylinder and the third cylinder of the single-seat anti-mixing valve, so as to automatically pressurize the piston of the first cylinder during the CIP of the leakage cavity, prevent the spool from being pushed up due to the pressure fluctuation of the leakage cavity, and avoid the contamination of the material cavity and the related pipelines by the cleaning liquid.
[0058] The foregoing has shown and described the basic principles, main features, and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.
Claims
1. A gas circuit control device based on a single-seat anti-mixing valve, comprising a device body, characterized in that: The device body comprises a single-seat anti-mixing valve, an angle valve, and a distribution assembly, wherein the single-seat anti-mixing valve connects the angle valve and the distribution assembly; The single-seat anti-mixing valve has a first cylinder and a valve chamber, the valve chamber includes a material chamber and a leakage chamber, the first cylinder has a first interface and a second interface, the first interface is connected to the chamber above the piston of the first cylinder, the second interface is connected to the chamber below the piston of the first cylinder, the valve chamber has a third interface and a fourth interface, the third interface and the fourth interface are both connected to the leakage chamber, the third interface is provided with a second cylinder for controlling the opening and closing of the third interface, and the fourth interface is provided with a third cylinder for controlling the opening and closing of the fourth interface. The angle valve has a fourth cylinder, the fourth cylinder is connected to the gas source, the valve cavity of the angle valve is connected to the third interface, and the fourth interface is set as a grounding interface. The first interface, the second interface, the second cylinder, and the third cylinder are all connected to the distribution component, and the distribution component is connected to a gas source.
2. The gas circuit control device based on the single-seat anti-mix valve according to claim 1 is characterized in that: The distribution assembly includes a first control valve, which is a solenoid valve with a two-position three-way structure and has three interfaces, including two working interfaces and an air source interface, wherein the air source interface is connected to an air source. The first interface is connected to one of the two working interfaces of the first control valve, and the second interface, the second cylinder, and the third cylinder are all connected to the other of the two working interfaces of the first control valve.
3. The gas circuit control device based on the single-seat anti-mix valve according to claim 2 is characterized in that: The fourth cylinder is connected to the gas source through the distribution component and connected to the gas source through the distribution component.
4. The gas circuit control device based on the single-seat anti-mix valve according to claim 1 is characterized in that: The distribution assembly includes a first control valve and a second control valve. The first control valve and the second control valve are both two-position three-way valves. Both have two working interfaces and one gas source interface. The gas source interface is connected to the gas source. One working interface of the first control valve is connected to the first interface, and the other working interface is connected to the second interface and the third cylinder. One working interface of the second control valve is connected to the second cylinder, and the other working interface is connected to the fourth cylinder.
5. The gas circuit control device based on a single-seat anti-mix valve according to any one of claims 1 to 4, characterized in that: The valve cavity sealing structure of the single-seat anti-mixing valve is configured as a conical upper sealing and radial lower sealing structure.
6. The gas circuit control device based on the single-seat anti-mix valve according to claim 5 is characterized in that: The valve cavity sealing structure adopts a sealing element made of silicone, fluororubber or EPDM.
7. The gas circuit control device based on a single-seat anti-mix valve according to any one of claims 1 to 4, characterized in that: The valve body of the single-seat anti-mixing valve is connected to the housing bracket of the actuator by a clamp.