Pneumatic valve device

Abstract

The utility model provides a kind of pneumatic valve device, including reversing valve, main gas path, spare gas path and downstream gas path.Reversing valve has air inlet and two gas outlets, and the air inlet of reversing valve is used to communicate to gas supply source, and the air inlet of reversing valve can be controllably conducted with one of its two gas outlets.The upstream of main gas path is communicated with one gas outlet of reversing valve, and main gas path includes first branch and second branch.The upstream of spare gas path is communicated with another gas outlet of reversing valve.The upstream of downstream gas path is communicated with the downstream of main gas path and spare gas path, and the downstream of downstream gas path is used to communicate to pneumatic actuator.The utility model adopts double-level redundancy design, first level switches main spare gas path by reversing valve, realizes the first level redundancy of gas supply gas path.Second level sets parallel branch in main gas path, realizes the second level redundancy of gas supply gas path, and this design ensures that single component failure does not affect continuous gas supply, greatly improves gas supply reliability.

Description

Technical Field

[0001] This utility model belongs to the technical field, specifically relating to a pneumatic valve device. Background Technology

[0002] In industrial production, pneumatic valves, as key actuators for controlling gas media, directly impact production safety and system stability. This is especially true in high-risk industries such as petrochemicals and natural gas, where pneumatic actuators at the terminal point require a continuous gas supply; a gas supply failure could trigger a major safety accident.

[0003] In existing technologies, pneumatic valves mostly employ a single solenoid valve drive. While this approach is simple in structure and low in cost, it has significant drawbacks. When the single solenoid valve malfunctions (e.g., coil burnout or valve core jamming), the valve will fail to operate normally. To address this issue, some existing solutions employ redundant valve designs. However, traditional redundant valves often suffer from high system complexity, large size, and excessive cost. Furthermore, they lack effective monitoring of circuit pressure, making it difficult to quickly diagnose fault locations. In addition, traditional redundant control devices lack sufficient safety reset performance under power failure conditions, failing to meet high reliability requirements.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this utility model is to provide a pneumatic valve device to solve the problems of low reliability caused by redundant design in existing pneumatic valve devices.

[0006] To achieve the above objectives, a specific embodiment of this utility model provides a pneumatic valve device, which includes a reversing valve, a main air path, a backup air path, and a downstream air path. The reversing valve has an inlet and two outlets. The inlet of the reversing valve is connected to an air supply source, and the inlet can be controllably connected to one of its two outlets. The upstream of the main air path is connected to one outlet of the reversing valve. The main air path includes a first branch and a second branch. The first branch includes a first control valve, and the second branch includes a second control valve. The upstream of the backup air path is connected to the other outlet of the reversing valve. The upstream of the downstream air path is connected to the downstream of the main air path and the backup air path, and the downstream of the downstream air path is connected to a pneumatic actuator.

[0007] In one or more embodiments of this utility model, the main air path further includes a third control valve whose outlet is connected to the upstream of the downstream air path. The two inlets of the third control valve are respectively connected to the downstream of the first branch and the second branch. The third control valve is configured to be controllably connected to one of the first branch and the second branch.

[0008] In one or more embodiments of the present invention, the pneumatic valve device further includes a fourth control valve whose outlet is connected to the upstream of the downstream air path. The two inlets of the fourth control valve are respectively connected to the downstream of the backup air path and the outlet of the third control valve. The fourth control valve is configured to be controllably connected to one of the outlets of the backup air path and the third control valve.

[0009] In one or more embodiments of this utility model, the third control valve is configured to be connected to the one with higher air pressure downstream of the first branch and the second branch.

[0010] In one or more embodiments of this utility model, the fourth control valve is configured to be connected to the one with higher gas pressure downstream of the backup gas path and downstream of the third control valve.

[0011] In one or more embodiments of this utility model, the third control valve is configured as a shuttle valve.

[0012] In one or more embodiments of this utility model, the fourth control valve is configured as a shuttle valve.

[0013] In one or more embodiments of the present invention, the pneumatic valve device further includes a valve block, with the main air passage, the backup air passage and the downstream air passage at least partially formed inside the valve block, the reversing valve, the first control valve and the second control valve disposed on the outer surface of the valve block, and the third control valve and the fourth control valve disposed inside the valve block.

[0014] In one or more embodiments of this utility model, the reversing valve is configured as a five-position three-way solenoid valve, and the reversing valve also includes two exhaust ports.

[0015] In one or more embodiments of this utility model, the first control valve is configured as a normally closed single-electrically controlled two-position three-way solenoid valve, and the first control valve also includes an exhaust valve.

[0016] In one or more embodiments of this utility model, the second control valve is configured as a normally closed single-electrically controlled two-position three-way solenoid valve, and the second control valve also includes an exhaust port.

[0017] In one or more embodiments of this utility model, the first branch further includes a first pressure switch located downstream of the first control valve.

[0018] In one or more embodiments of this utility model, the second branch further includes a second pressure switch located downstream of the second control valve.

[0019] In one or more embodiments of this utility model, the downstream gas path further includes a quick exhaust valve.

[0020] In one or more embodiments of this utility model, the pneumatic valve device further includes an air source interface located upstream of the reversing valve.

[0021] In one or more embodiments of this utility model, the pneumatic valve device further includes a pressure transmitter located upstream of the directional valve.

[0022] Compared with existing technologies, this invention adopts a dual-level redundancy design. The first level achieves primary redundancy of the gas supply path by switching between the main and backup gas paths through a reversing valve. The second level achieves secondary redundancy of the gas supply path by setting parallel branches in the main gas path. This design ensures that the failure of a single component does not affect the continuous gas supply, greatly improving the reliability of the gas supply. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural diagram of a pneumatic valve device in one embodiment of the present invention; Figure 2 This is a cross-sectional structural diagram of a pneumatic valve device in one embodiment of the present invention; Figure 3 This is another cross-sectional view of the pneumatic valve device in one embodiment of the present invention; Figure 4 This is another cross-sectional view of the pneumatic valve device in one embodiment of the present invention; Figure 5 This is a diagram of the internal air passage structure of the valve block in one embodiment of the present invention; Figure 6 This is a schematic diagram of the air path of a pneumatic valve device in one embodiment of the present invention.

[0025] Explanation of main reference numerals: 1. Reversing valve; 2. Main air path; 21. First branch; 211. First control valve; 212. First pressure switch; 22. Second branch; 221. Second control valve; 222. Second pressure switch; 23. Third control valve; 3. Backup air path; 4. Downstream air path; 41. Quick exhaust valve; 5. Fourth control valve; 6. Valve block; 7. Air source interface; 8. Pressure transmitter. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0027] In the description of this utility model, it should be understood that the terms "top", "bottom", "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, the term "first" is used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In one embodiment, reference is made to Figures 1 to 6 As shown, this utility model provides a pneumatic valve device. The pneumatic valve device adopts a redundant air path design. When one air path fails, the pneumatic actuator can be supplied with air through the backup air path to ensure the normal operation of the pneumatic actuator.

[0030] Specifically, the pneumatic valve device includes a reversing valve 1, a main air passage 2, a backup air passage 3, and a downstream air passage 4. The reversing valve 1 has one inlet and two outlets. The inlet of the reversing valve 1 is connected to an air supply source. Under the control of the valve core of the reversing valve 1, the inlet of the reversing valve 1 can be controllably connected to one of the two outlets of the reversing valve 1. The upstream of the main air passage 2 is connected to one outlet of the reversing valve 1. The main air passage 2 includes a first branch 21 and a second branch 22. The first branch 21 includes a first control valve 211, and the second branch 22 includes a second control valve 221. The downstream of the first branch 21 and the second branch 22 converge at one point. The first control valve 211 connects the upstream of the first branch 21 to its downstream, and the second control valve 221 connects the upstream of the second branch 22 to its downstream. The upstream of the backup air passage 3 is connected to the other outlet of the reversing valve 1. The downstream of the main air passage 2 and the downstream of the backup air passage 3 converge at one point and are connected to the upstream of the downstream air passage 4. The downstream of the downstream air passage 4 is used to connect to the pneumatic actuator.

[0031] The core advantage of the above structural design lies in its dual-level redundant air path design. The first level is the reversing valve 1, which can switch between two air outlets. When the downstream air path of one of the outlets of the reversing valve 1 fails, the inlet of the reversing valve 1 can be switched to the other outlet through automatic control or manual switching, and the other air path can be used to supply air to the pneumatic actuator normally, thus achieving primary redundancy of the air source path. The second level is the main air path 2, which is generally used as the primary air path, and the backup air path 3 is used as the backup air path. The first branch 21 and the second branch 22 of the main air path 2, which are connected in parallel, constitute secondary redundancy. When either the first branch 21 or the second branch 22 fails, the upstream and downstream of the failed branch can be disconnected through the corresponding control valve, and then quickly switched to the other branch, improving the stability of the primary air path.

[0032] The dual-level redundant air path design of the pneumatic valve device ensures that a single valve failure or branch failure will not cause the entire pneumatic valve device to shut down, achieving uninterrupted air supply to the pneumatic actuator and guaranteeing the continuity and stability of its operation. Furthermore, this pneumatic valve device allows for troubleshooting and maintenance of faulty components without shutting down the system, simplifying the maintenance process and making it particularly suitable for applications with extremely high requirements for air source stability and system reliability.

[0033] In one embodiment, the reversing valve 1 is configured as a five-position three-way solenoid valve. The reversing valve 1 also includes two exhaust ports. Under the control of the valve core of the reversing valve 1, one exhaust port of the reversing valve 1 can be connected to one of the outlet ports of the reversing valve 1, and the other exhaust port of the reversing valve 1 can be connected to the other outlet port of the reversing valve 1. The reversing valve 1 is equivalent to having five ports, where port 1# is the inlet, ports 2# and 4# are outlets, and ports 3# and 5# are exhaust ports. Port 2# is connected to the upstream of the main air passage 2, port 4# is connected to the upstream of the backup air passage 3, and ports 3# and 5# are connected to the external environment.

[0034] When the main gas line 2 is supplying gas, ports 1# and 2# are normally connected, and ports 4# and 5# are connected, so that the gas medium in the backup gas line 3 can be discharged to the external environment through port 5#, quickly releasing the gas medium in the backup gas line 3 and avoiding equipment damage or major accidents.

[0035] Similarly, when the main gas path 2 malfunctions and gas needs to be supplied through the backup gas path 3, ports 1# and 4# can be connected to allow the gas medium to smoothly enter the backup gas path 3. At the same time, ports 2# and 3# can be connected to allow the gas medium in the main gas path 2 to be discharged into the external environment through port 3#, quickly releasing the gas medium in the main gas path 2 and preventing equipment damage or major accidents.

[0036] In one embodiment, the first control valve 211 and the second control valve 221 are normally closed, single-electrode, two-position, three-way solenoid valves. In addition to an inlet and an outlet, each control valve 211 and 221 has an exhaust port connected to the external environment. When one of the first branch 21 or the second branch 221 fails and the gas supply switches to the other, the spring mechanism within the control valve of the faulty branch automatically drives the valve core to reset, blocking the inlet and connecting the outlet and exhaust port, thereby discharging the gaseous medium downstream of the faulty branch to the external environment.

[0037] In one embodiment, reference is made to Figure 3 and Figure 6As shown, the main gas path 2 also includes a third control valve 23. The third control valve 23 has two inlets and one outlet. The two inlets of the third control valve 23 are respectively connected to the downstream of the first branch 21 and the downstream of the second branch 22. The outlet of the third control valve 23 is connected to the upstream of the downstream gas path 4. The third control valve 23 is a two-way valve. When the main gas path 2 is supplying gas normally, the third control valve 23 can only be connected to one of the first branch 21 and the second branch 22. For example, when the third control valve 23 is connected to the first branch 21, the first control valve 211 of the first branch 21 can normally connect the upstream and downstream of the first branch 21, while the second control valve 221 of the second branch 22 automatically blocks the upstream and downstream of the second branch 22, so that only one of the first branch 21 and the second branch 22 can supply gas.

[0038] In addition, the third control valve 23 can physically isolate the first branch 21 and the second branch 22, which can effectively prevent compressed air from flowing in reverse from the high pressure side of the main air line 2 to the fault side when the control valve on one of the branches fails, thus avoiding potential internal backflow problems and ensuring a stable supply of air pressure to the downstream air line 4.

[0039] Furthermore, the third control valve 23 is configured as a shuttle valve. Based on the characteristics of a shuttle valve, in practical applications, the third control valve 23 can be connected to the branch with the higher gas pressure downstream of the first branch 21 and the second branch 22. Generally speaking, the branch with the relatively higher gas pressure has better gas supply stability and can perform more stable gas supply operations. In addition, when one of the first branch 21 and the second branch 22 fails and the gas supply switches to the other branch, the gas medium downstream of the faulty branch will be discharged from the faulty branch through the exhaust port of the control valve. Therefore, the gas pressure downstream of the faulty branch will drop significantly. The third control valve 23 can automatically disconnect the connection of its faulty branch and immediately connect to the other branch to continue gas supply.

[0040] In one embodiment, reference is made to Figure 4 and Figure 6As shown, the pneumatic valve device also includes a fourth control valve 5. The fourth control valve 5 has a similar structure to the third control valve 23. One inlet of the fourth control valve 5 is connected to the downstream of the main air path 2 (i.e., one inlet of the fourth control valve 5 is connected to the outlet of the third control valve 23), the other inlet of the fourth control valve 5 is connected to the downstream of the backup air path 3, and the outlet of the fourth control valve 5 is connected to the upstream of the downstream air path 4. The fourth control valve 5 is a two-way valve; it can only be connected to one of the main air path 2 or the backup air path 3. For example, under normal operating conditions, the main air path 2 supplies air normally. At this time, the fourth control valve 5 is connected to the outlet of the third control valve 23 (i.e., the fourth control valve 5 is connected to the main air path 2) but not to the backup air path 3, allowing the main air path 2 to supply air normally. When the main air path 2 malfunctions, the fourth control valve 5 is connected to the backup air path 3 but not to the outlet of the third control valve 23.

[0041] In addition, the fourth control valve 5 can physically isolate the main air circuit 2 and the backup air circuit 3, which can effectively prevent compressed air from flowing in reverse from the high-pressure side of the air circuit to the fault side when a fault occurs in one of the air circuits, avoid potential internal backflow problems, and ensure stable air pressure supply to the downstream air circuit 4.

[0042] Furthermore, the fourth control valve 5 is configured as a shuttle valve. Based on the characteristics of the shuttle valve, in practical applications, the fourth control valve 5 can be connected to the outlet of the third control valve 23 (i.e., downstream of the main gas path 2) and the downstream of the backup gas path 3, where the gas pressure is higher. When one of the main gas path 2 and the backup gas path 3 fails and the gas supply switches to the other, the gas medium downstream of the faulty gas path will be discharged from the faulty gas path, thus the gas pressure downstream of the faulty gas path will drop significantly. The fourth control valve 5 can automatically disconnect the connection of its faulty gas path and immediately connect to the other gas path to continue supplying gas.

[0043] In one embodiment, reference is made to Figures 1 to 4 As shown, the pneumatic valve device also includes a valve block 6. The main air passage 2, the backup air passage 3, and the downstream air passage 4 are at least partially formed inside the valve block 6. The reversing valve 1, the first control valve 211, and the second control valve 221 are located on the outer surface of the valve block 6. The third control valve 23 and the fourth control valve 5 are located inside the valve block 6. This design can improve the integration of the pneumatic valve device and avoid laying a large number of messy pipes between the various valves.

[0044] In one embodiment, reference is made to Figure 3 and Figure 6As shown, the first branch 21 also includes a first pressure switch 212 located downstream of the first control valve 211, and the second branch 22 also includes a second pressure switch 222 located downstream of the second control valve 221. The first pressure switch 212 and the second pressure switch 222 are specifically installed on the outer surface of the valve block 6. The first pressure switch 212 and the second pressure switch 222 can monitor the air pressure of the first branch 21 and the second branch 22 in real time, provide feedback on the air circuit status, and assist personnel in troubleshooting air circuit faults.

[0045] In one embodiment, reference is made to Figure 1 and Figure 6 As shown, the pneumatic valve device also includes a pressure transmitter 8 located upstream of the directional valve 1, specifically mounted on the outer surface of the valve block 6. The pressure transmitter 8 can convert physical pressure signals into standard signals and remotely transmit them to the control module, providing decision-making basis for the monitoring, control, and protection of the pneumatic valve device.

[0046] In one embodiment, reference is made to Figure 1 , Figure 4 and Figure 6 As shown, the downstream air path 4 also includes a quick-release valve 41, which is specifically installed on the outer surface of the valve block 6 and located at the front end of the pneumatic actuator. When the entire pneumatic valve device fails, the gas medium in the pneumatic valve device and the pneumatic actuator can be quickly discharged to the external environment through the quick-release valve 41, accelerating the depressurization speed of the air path and ensuring that each valve closes quickly.

[0047] In one embodiment, reference is made to Figure 1 As shown, the pneumatic valve device also includes an air source interface 7 located upstream of the reversing valve 1. The air source interface 7 is specifically installed on the outer surface of the valve block 6 and is arranged opposite to the quick exhaust valve 41. The air source interface 7 is mainly used to connect to the air supply source and transport the gas medium provided by the air supply source to the pneumatic valve device.

[0048] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pneumatic valve device, characterized in that, The pneumatic valve device includes: A reversing valve (1) has an air inlet and two air outlets. The air inlet of the reversing valve (1) is used to connect to an air supply source. The air inlet of the reversing valve (1) can be controlled to be connected to one of its two air outlets. The main air passage (2) is connected upstream to one of the outlets of the reversing valve (1). The main air passage (2) includes a first branch (21) and a second branch (22). The first branch (21) includes a first control valve (211), and the second branch (22) includes a second control valve (221). The backup air passage (3) is connected upstream to another air outlet of the reversing valve (1); The downstream air passage (4) is connected upstream to the downstream of the main air passage (2) and the backup air passage (3), and the downstream of the downstream air passage (4) is used to connect to the pneumatic actuator.

2. The pneumatic valve device according to claim 1, characterized in that, The main gas path (2) also includes a third control valve (23) whose outlet is connected to the upstream of the downstream gas path (4). The two inlets of the third control valve (23) are respectively connected to the downstream of the first branch (21) and the second branch (22). The third control valve (23) is configured to be controllably connected to one of the first branch (21) and the second branch (22).

3. The pneumatic valve device according to claim 2, characterized in that, The pneumatic valve device also includes a fourth control valve (5) whose outlet is connected to the upstream of the downstream air path (4). The two inlets of the fourth control valve (5) are respectively connected to the downstream of the backup air path (3) and the outlet of the third control valve (23). The fourth control valve (5) is configured to be controllably connected to one of the outlets of the backup air path (3) and the third control valve (23).

4. The pneumatic valve device according to claim 3, characterized in that, The third control valve (23) is configured to connect with the downstream of the first branch (21) and the downstream of the second branch (22) with the higher air pressure; and / or, The fourth control valve (5) is configured to connect with the one with higher gas pressure downstream of the backup gas line (3) and downstream of the third control valve (23).

5. The pneumatic valve device according to claim 3, characterized in that, The third control valve (23) is configured as a shuttle valve; and / or, The fourth control valve (5) is configured as a shuttle valve.

6. The pneumatic valve device according to claim 3, characterized in that, The pneumatic valve device also includes a valve block (6), the main air passage (2), the backup air passage (3) and the downstream air passage (4) are at least partially formed inside the valve block (6), the reversing valve (1), the first control valve (211) and the second control valve (221) are located on the outer surface of the valve block (6), and the third control valve (23) and the fourth control valve (5) are located inside the valve block (6).

7. The pneumatic valve device according to claim 1, characterized in that, The reversing valve (1) is configured as a five-position three-way solenoid valve, and the reversing valve (1) further includes two exhaust ports; and / or, The first control valve (211) is configured as a normally closed, single-electrode, two-position, three-way solenoid valve, and the first control valve (211) further includes an exhaust port; and / or, The second control valve (221) is configured as a normally closed single-electric control two-position three-way solenoid valve, and the second control valve (221) also includes an exhaust port.

8. The pneumatic valve device according to claim 1, characterized in that, The first branch (21) also includes a first pressure switch (212) located downstream of the first control valve (211); and / or, The second branch (22) also includes a second pressure switch (222) located downstream of the second control valve (221).

9. The pneumatic valve device according to claim 1, characterized in that, The downstream gas path (4) also includes a quick exhaust valve (41); and / or, The pneumatic valve device also includes an air source interface (7) located upstream of the reversing valve (1).

10. The pneumatic valve device according to claim 1, characterized in that, The pneumatic valve device also includes a pressure transmitter (8) located upstream of the directional valve (1).

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