Valve terminal integrated multi-control valve fluid passage structure and control system and method thereof

Abstract

The invention discloses a valve terminal integrated multi-control valve fluid passage structure and a control system and method thereof. The fluid passage structure comprises a valve terminal, a control valve bank connected to the valve terminal and an execution unit controlled by the control valve bank. A first one-way valve is further arranged on the pipeline between the control valve set and the execution unit, and the first one-way valve is provided with a forward channel communicating the control valves and the execution unit in the forward direction and a reverse channel communicating the execution unit and the external space. The first one-way valve and the second one-way valve are arranged on the pipeline between the control valve group and the execution unit, so that false triggering of airflow to the starting unit when the exhaust holes of the control valve group are synchronously opened can be blocked, and stable and reliable operation of equipment and a system is guaranteed; meanwhile, the first one-way valve and the second one-way valve which are connected in series can keep enough opening degree in the exhaust process of the starting unit, so that rapid exhaust and closing are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical control systems, and particularly to a fluid passage structure integrating multiple control valves on a valve island, its control system, and method. Background Art

[0002] A single-acting component (taking a single-acting cylinder as an example) usually works in cooperation with a two-position three-way or four-position double three-way solenoid valve. The single-acting cylinder obtains the opening / closing power through the normally closed "one-in-one-out" working mode of the four-position double three-way solenoid valve. When the solenoid valve coil is energized, it provides strong extending power for the cylinder; when the solenoid valve coil is de-energized, the working chamber of the cylinder is connected to the exhaust port of the valve island. While the cylinder loses the extending power, the internal spring rebounds rapidly to discharge the internal residual gas and returns to the initial state.

[0003] A double-acting component (taking a double-acting cylinder as an example) is mostly used in combination with a two-position five-way solenoid valve. The two-position five-way solenoid valve can flexibly control the bidirectional movement of the cylinder, providing strong support for the complex actions of the equipment. When the cylinder executes the extending / retracting command, the working chamber obtains pneumatic power from the air inlet of the valve island through the two-position five-way solenoid valve, and at the same time discharges the residual gas in the non-working chamber into the exhaust port of the valve island.

[0004] In the application of automated equipment, the four-position double three-way solenoid valve and the two-position five-way solenoid valve often share a common air source valve island base, and the air inlets and exhaust ports of all solenoid valves are interconnected. The common air pressure of the valve island air source is 0.6 MPa. When the two-position five-way solenoid valves on the valve island exhaust simultaneously, the instantaneous pressure at the exhaust port will increase sharply. This instantaneous pressure is higher than the minimum opening pressure of the single-acting component controlled by the four-position double three-way solenoid valve. The increased pressure at the exhaust port is like an uncontrolled air source, providing power to open the single-acting component through the four-position double three-way solenoid valve. This abnormal phenomenon may trigger the alarm mechanism of the equipment and even lead to more serious operation risks. It will not only damage the equipment, cause misoperation of the key components of the equipment and deviation of the process parameters, but also affect the product quality and production efficiency, bringing great uncertainty and potential risks to the process manufacturing. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a fluid passage structure integrating multiple control valves on a valve island, its control system, and method to solve the technical problem of the risk of mis-triggering in the existing control valve for controlling the execution unit.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] In a first aspect, an embodiment of the present invention provides a fluid passage structure integrating multiple control valves on a valve island, which includes: a valve island, a control valve group connected to the valve island, and an execution unit controlled by the control valve group;

[0008] Wherein, a first one-way valve is further provided on the pipeline between the control valve group and the execution unit. The first one-way valve has a forward channel that positively connects the control valve and the execution unit, and a reverse channel that connects the execution unit and the external space.

[0009] Wherein, the starting pressure value of the first one-way valve is not less than the total pressure value when the exhaust ports of the control valve group start to exhaust synchronously.

[0010] Wherein, the control valve group includes: a two-position five-way valve and a four-position double three-way valve.

[0011] Wherein, a number of vacant positions for connecting control valves are further provided on the valve island.

[0012] Wherein, a second one-way valve is further connected in series on the pipeline between the control valve group and the execution unit. The second one-way valve is used to isolate the air flow transported from the exhaust hole of the valve island to the execution unit.

[0013] Wherein, the second one-way valve has a forward channel that connects the control valve group and the first one-way valve, and a reverse channel that connects the first one-way valve and the external space.

[0014] In a second aspect, an embodiment of the present invention provides a control system, which includes the valve island integrated multi-control valve fluid passage structure as described in any one of the above.

[0015] Wherein, it further includes an air source assembly and a gas distribution unit connected to the air source assembly. The output end of the gas distribution unit is connected to the valve island.

[0016] Wherein, the air source assembly includes: an air source generator and an air pipe connected to the output end of the air source generator. A switch valve, a pressure regulating valve and a pressure gauge are sequentially arranged on the air pipe.

[0017] In a third aspect, an embodiment of the present invention provides a method for preventing mis-triggering of a valve island integrated multi-control valve, which includes the following steps:

[0018] Set a first one-way valve and a second one-way valve on the pipeline between the control valve group and the execution unit. The first one-way valve and the second one-way valve are connected in series front and back. The control valve group is integrated on the valve island. Both the first one-way valve and the second one-way valve have a forward channel and a reverse channel.

[0019] The fluid passage structure of the valve island integrated multi-control valve and its control system and method of the present invention can prevent the mis-triggering of the starting unit by the airflow when the exhaust holes of the control valve group are synchronously opened by arranging a first one-way valve and a second one-way valve on the pipeline between the control valve group and the execution unit, ensuring the stable and reliable operation of the equipment and system. At the same time, the series-connected first one-way valve and second one-way valve can maintain a sufficient opening during the exhaust process of the starting unit, enabling it to exhaust and close quickly.

[0020] The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, the following preferred embodiments are specifically described in detail as follows. Brief Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the control system of the fluid passage structure of the valve island integrated multi-control valve according to an embodiment of the present invention.

[0022] Description of the Reference Numerals:

[0023] Control system 100, gas source assembly 10, gas source generator 11, switching valve 12, pressure regulating valve 13, pressure gauge 14, gas distribution unit 20, valve island 30, vacant position 31, control valve group 40, two-position five-way valve 41, four-position double three-way valve 42, second one-way valve 50, first one-way valve 60, execution unit 70. Detailed Embodiments

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts belong to the protection scope of the present invention.

[0026] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present invention.

[0027] In addition, the terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms such as "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral molding; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0030] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0031] In the application of automated equipment, a four-way double-three-way solenoid valve and a two-way five-way solenoid valve often share a gas source valve island base, and the air inlets and exhaust ports of all solenoid valves are interconnected. The common air pressure of the valve island gas source is 0.6 MPa. When the two-way five-way solenoid valves on the valve island exhaust simultaneously, the instantaneous pressure at the exhaust port will increase sharply. This instantaneous pressure is higher than the minimum opening pressure of the single-acting component controlled by the four-way double-three-way solenoid valve. The increased pressure at the exhaust port is like an uncontrolled gas source, providing power to open the single-acting component through the four-way double-three-way solenoid valve. This abnormal phenomenon may trigger the alarm mechanism of the equipment and even cause more serious operation risks. It will not only damage the equipment, resulting in misoperation of key components of the equipment and deviation of process parameters, but also affect the quality and production efficiency of the products, bringing great uncertainty and potential losses to the process manufacturing. To solve the above problems, this embodiment discloses a fluid passage structure of a valve island integrated with multiple control valves.

[0032] Please refer to Figure 1 , this fluid passage structure of a valve island integrated with multiple control valves includes: a valve island 30, a control valve group 40 connected to the valve island 30, and an execution unit 70 controlled by the control valve group 40; the control valve group 40 controls the external gas source to be delivered to the execution unit 70, so that the execution unit 70 performs a moving action, and the control valve group 40 is a control switch for controlling the on-off of the fluid passage. In this embodiment, the execution unit 70 is described by taking a cylinder as an example.

[0033] Among them, a first one-way valve 60 is further provided on the fluid communication pipeline between the control valve group 40 and the execution unit 70. The first one-way valve 60 has a forward channel for positively connecting the control valve 40 and the execution unit 70, and a reverse channel for connecting the execution unit 70 and the external space. Here, the external space refers to the environment of the equipment connected by the first one-way valve 60, which is relative to the internal fluid flow space of this fluid passage system. The control valve group 40 is used to control the on-off of the flow of gas, liquid, etc.

[0034] During the startup process of the execution unit 70, the control valve group 40 controls the opening of the external power source input passage, and the execution unit 70 is driven by the fluid to move a first stroke in the first direction. When the startup unit 70 stops, the control valve group 40 controls the closing of the air source fluid passage. At this time, the execution unit 70 relies on the internal elastic reset member to move in the reverse direction of the first direction to reset. During this process, the fluid located in the execution unit 70 is discharged reversely from the first exhaust pipe 60 to the outside of the pipeline. During the opening process of the execution unit 70, the fluid output by the control valve group 40 is transported to the execution unit 70 through the forward passage of the first one-way valve 60. After the startup unit 70 stops, the internal fluid is output to the outside through the reverse passage of the first one-way valve 60.

[0035] Among them, the startup pressure value of the first one-way valve 60 is not less than the total pressure value when the exhaust ports of the control valve group 40 start to exhaust synchronously. As described in the background art, when multiple control valves integrated on the valve island 30 are opened and exhausted synchronously, the pressure value of the exhaust passage of the valve island will increase sharply, causing the air flow to be transported along the pipeline between the control valve group 40 and the execution unit 70 to the execution unit 70, resulting in abnormal startup of the execution unit 70. If applied to precision system equipment, the execution action of the execution unit 70 will have a serious impact on the operation of the entire equipment, resulting in system failures or equipment damage. In order to solve the influence of the synchronous exhaust (or drainage) of multiple control valves integrated on the valve island 30 on the mis-triggering of the execution unit 70, in this embodiment, a first one-way valve 60 is added to the pipeline between the control valve group 40 and the execution unit 70. The forward passage of the first one-way valve 60 is a one-way passage, and the opening pressure value of the one-way passage is not less than the total pressure value generated when all the control valves integrated on the valve island 30 exhaust synchronously. Under this condition, the first one-way valve 60 can still be in a closed state, and the air flow in the exhaust passage of the valve island 30 will not flow into the execution unit 70, nor will it cause mis-triggering startup of the execution unit 70.

[0036] In this embodiment, the control valve group 40 includes: a two-position five-way valve 41 and a four-position double three-way valve 42. It can be understood that in other embodiments, the control valves integrated on the valve island 30 can also be other arbitrary types of valve bodies, depending on the type of execution unit they control.

[0037] Furthermore, there are several vacant positions 31 for connecting control valves on the valve island 30. Here, since the first one-way valve 60 is provided on the pipeline between the control valve group 40 and the execution unit 70, therefore, control valves can be arbitrarily added to the vacant positions 31 on the valve island 30. At this time, it is necessary to test the total air pressure value generated when all the control valves integrated on the valve island 30 are opened and exhausted synchronously, and just select a first one-way valve 60 whose opening air pressure value is not less than the total of the above air pressure values.

[0038] The valve island 30 is a device used in industrial automation control systems and is usually composed of multiple electrically controlled valves. Its structure is similar to an "island" and integrates signal input / output and signal control functions. The valve island can precisely adjust various parameters in the production process by controlling the flow and pressure of fluids (such as gases and liquids).

[0039] Please refer to again Figure 1 , a second one-way valve 50 is also connected in series on the pipeline between the control valve group 40 and the execution unit 70. The second one-way valve 50 is used to isolate the airflow transported from the exhaust hole of the valve island 30 to the execution unit. The reason for using the first one-way valve 60 and the second one-way valve 50 in series to control the fluid passage transported from the control valve group 40 to the execution unit 70 is that compared with the design of a single first one-way valve 60, it is more beneficial for the first one-way valve 60 to be in a larger opening degree, improving the start-stop speed of the exhaust valve. During the process of the gas inside the execution unit 70 discharging gas through the reverse channel of the first one-way valve 60, in order to avoid the influence of the airflow resistance transported by the control valve group 40 on the opening degree of the reverse channel, the second one-way valve 50 can completely isolate the starting fluid (including gases and liquids) transported by the control valve group 40. At this time, the opening degree of the reverse channel of the first one-way valve 60 always remains the maximum opening degree, that is, the fluid inside the execution unit 70 can be quickly discharged, thereby improving the start-stop speed of the first one-way valve 60.

[0040] Similarly, the second one-way valve 50 has a forward channel connecting the control valve group 40 and the first one-way valve 60 and a reverse channel connecting the first one-way valve 60 and the external space.

[0041] It should be noted that in the above embodiment, the fluid passage structure of the valve island integrating multiple control valves adopts a pneumatic method, and the corresponding control valve group 40 is an electromagnetic valve group. In other embodiments, the fluid passage structure of the valve island integrating multiple control valves can also adopt liquid drive, the corresponding execution unit 70 can be replaced with a hydraulic cylinder, etc., and the corresponding control valve group 40 is a liquid control valve.

[0042] Please refer to again Figure 1 , this embodiment also discloses a control system 100, and this control system 100 includes the fluid passage structure of the valve island integrating multiple control valves as described above.

[0043] Specifically, this control system 100 further includes a gas source assembly 10 and a gas distribution unit 20 connected to the gas source assembly 10. The output end of the gas distribution unit 20 is connected to the valve island 30.

[0044] Among them, the gas source assembly 10 includes: a gas source generator 11 and a gas pipe connected to the output end of the gas source generator. A switch valve 12, a pressure regulating valve 13, and a pressure gauge 14 are sequentially arranged on the gas pipe.

[0045] An embodiment of the present invention further provides a method for preventing mis-triggering of a multi-control valve integrated in a valve island. This method is executed by the control system 100 and includes the following steps:

[0046] A first one-way valve 60 and a second one-way valve 50 are arranged on the pipeline between the control valve group 40 and the execution unit 70. The first one-way valve 60 and the second one-way valve 50 are connected in series front and back. The control valve group 40 is integrated in the valve island 30. Both the first one-way valve 60 and the second one-way valve 50 have a forward channel and a reverse channel.

[0047] Finally, it should be noted that in the above embodiment, the control system 100 adopts a pneumatic mode, and the corresponding control valve group 40 is an electromagnetic valve group. In other embodiments, the control system can also adopt liquid drive, the corresponding execution unit 70 can be replaced by a hydraulic cylinder, etc., and the corresponding control valve group 40 is a hydraulic valve.

[0048] For the fluid passage structure of the valve island integrated with multiple control valves and its control system and method in this embodiment, by arranging a first one-way valve and a second one-way valve on the pipeline between the control valve group and the execution unit, it can block the mis-triggering of the start unit by the air flow when the exhaust holes of the control valve group are opened synchronously, ensuring the stable and reliable operation of the equipment and the system. At the same time, the series-connected first one-way valve and second one-way valve can maintain a sufficient opening during the exhaust process of the start unit, enabling it to exhaust and close quickly.

[0049] The above is only to further illustrate the technical content of the present invention with examples to make it easier for readers to understand, but it does not mean that the implementation mode of the present invention is limited to this. Any technical extension or re-creation based on the present invention is protected by the present invention. The protection scope of the present invention is subject to the claims.

Claims

1. A fluid passage structure of a valve island integrated with multiple control valves, characterized in that, Comprising: A valve island, a control valve group connected to the valve island, and an execution unit controlled by the control valve group; Wherein, a first check valve is further provided on the pipeline between the control valve group and the execution unit, and the first check valve has a forward channel for positively connecting the control valve and the execution unit, and a reverse channel for connecting the execution unit to the external space.

2. The fluid passage structure of the valve island integrated multi-control valve according to claim 1, wherein The starting pressure value of the first check valve is not less than the total pressure value when the exhaust ports of the control valve group start to exhaust synchronously.

3. The fluid passage structure of the valve island integrated multi-control valve according to claim 2, characterized in that, The control valve group includes: a two-position five-way valve and a four-position double three-way valve.

4. The fluid passage structure of the valve island integrated multi-control valve according to claim 3, characterized in that There are also several vacant positions for connecting control valves on the valve island.

5. The fluid passage structure of the valve island integrated multi-control valve according to any one of claims 1 to 4, characterized in that A second check valve is also connected in series on the pipeline between the control valve group and the execution unit, and the second check valve is used to isolate the air flow transported from the exhaust hole of the valve island to the execution unit.

6. The fluid passage structure of the valve island integrated with multiple control valves according to claim 5, wherein The second check valve has a forward channel connecting the control valve group and the first check valve and a reverse channel connecting the first check valve and the external space.

7. A control system, characterized in that, The control system includes the valve island integrated multi-control valve fluid passage structure according to any one of claims 1 to 6.

8. The control system according to claim 7, characterized in that, It further includes a gas source assembly and a gas distribution unit connected to the gas source assembly, and the output end of the gas distribution unit is connected to the valve island.

9. The control system according to claim 8, wherein The gas source assembly includes: a gas source generator and a gas pipe connected to the output end of the gas source generator, and a switch valve, a pressure regulating valve and a pressure gauge are sequentially arranged on the gas pipe.

10. A method for preventing mis-triggering of multiple control valves integrated in a valve island, characterized in that, Including the following steps: A first check valve and a second check valve are arranged on the pipeline between the control valve group and the execution unit, the first check valve and the second check valve are connected in series front and back, the control valve group is integrated on the valve island, and both the first check valve and the second check valve have a forward channel and a reverse channel.

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