Pilot-operated type electromagnetic valve redundancy system
By designing a new redundant system, using a combination of three pilot solenoid valves and mechanical valves, the problems of high cost, complex wiring and safety hazards in the existing 2OO3 redundant system are solved, and a redundant system with lower cost, simpler wiring and higher reliability are achieved.
Patent Information
- Application Number
- CN202420835095.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-22
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-04-22
AI Technical Summary
In the existing 2OO3 redundant system, the configuration of four solenoid valves and four solenoid coils leads to increased user costs, complex field wiring and safety risks of leakage.
A new redundant system is designed, using three pilot solenoid valves, and the normal operation of the system is achieved through the combination of mechanical valves and reversing shuttle valves. Only two solenoid valves are needed to ensure the system's operation when the system is normal.
It reduces system costs, simplifies field wiring, reduces leakage safety risks, and improves system reliability.
Smart Images
Figure CN222616161U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a pilot-operated electromagnetic valve, in particular to a redundant 2OO3 pilot-operated electromagnetic valve. Background Art
[0002] A pilot solenoid valve is a valve that, when powered on, relies on electromagnetic force to lift the valve stem and the pilot valve port is opened. At this time, the upper chamber of the solenoid valve is depressurized through the pilot hole, forming a pressure difference around the main valve core, with the upper part lower and the lower part higher. Under the action of the pressure difference, the fluid pressure pushes the main valve core upward to open the main valve port; when the power is off, under the action of the spring force and the gravity of the main valve core, the valve stem is reset, the pilot hole is closed, the main valve core moves downward, and the main valve port is closed; the pressure in the upper chamber of the solenoid valve increases, and the fluid pressure pressurizes the main valve core for better sealing. For the sake of insurance, the redundant system adopts two or more sets of hardware, software or designs with the same independent configuration, and two or more sets of hardware, software or designs with the same independent configuration are operated at the same time to prevent the entire system from still working normally when one of the systems fails.
[0003] For the sake of insurance, a redundant system uses two or more sets of independently configured hardware, software or designs. Two or more sets of independently configured hardware, software or designs run simultaneously. When one of the systems fails, the other system still works normally, thus ensuring the normal operation of the entire system.
[0004] At present, the 2OO3 redundant system is widely used in the market. In this system, as long as any two sets of solenoid valves can operate normally among the three sets of solenoid valves, the whole system can operate normally. The 2OO3 solenoid valve redundant system (2OO3 redundant system is a special term, which is the name of a redundant system recognized by the industry) on the market actually has four solenoid valves (SOLENOID VALVE1, SOLENOID VALVE2, SOLENOID VALVE3, SOLENOID VALVE4), and these four solenoid valves are equipped with four electromagnetic coils to control the actions of the corresponding solenoid valves respectively. In order to control each solenoid valve individually, it is necessary to equip it with four switch signals. Therefore, users need four sets of signal lines for on-site use, which will lead to a series of risks such as increased user costs, messy and complicated on-site wiring, and increased leakage safety hazards. When the user has only three switch signals, the only way is to connect two of the solenoid valves in parallel, so that the two solenoid valves are combined into a new solenoid valve. However, such treatment will still cause some risks such as rising costs. Utility Model Content
[0005] The purpose of the utility model is to propose a new redundant system solenoid valve structure in order to reduce the cost of the 2OO3 redundant system, reduce the safety hazard of leakage and improve the on-site wiring. The design adopts three pilot solenoid valves. When only two of the three pilot solenoid valves in the system can operate normally, the entire system can operate normally.
[0006] The technical scheme of the utility model is a pilot solenoid valve redundancy system, including three pilot solenoid valves from the first to the third, a mechanical valve, and a reversing shuttle valve. The first and second pilot solenoid valves are connected in parallel, the outlets of the first and second pilot solenoid valves are connected to the first and second ports of the reversing shuttle valve through an air path, the third port of the reversing shuttle valve is connected to the inlet of the third pilot solenoid valve, and a check valve is connected in series to the first pilot solenoid valve; the mechanical valve is a valve with two inlets and two outlets, the first outlet of the first pilot solenoid valve is connected to the first inlet of the mechanical valve, the first outlet of the second pilot solenoid valve is connected to the second inlet of the mechanical valve, and the second inlet of the mechanical valve has a flow channel connected to the first outlet of the mechanical valve and connected to the second inlet of the second reversing shuttle valve. The second outlets of the first and second pilot solenoid valves are interconnected and connected to a muffler; the second outlet of the mechanical valve is interconnected with the second outlet of the third pilot solenoid valve and connected to a muffler. The first outlet of the third pilot solenoid valve is connected to the first inlet of the second reversing shuttle valve.
[0007] The shuttle valve can be understood as a spherical piston added to the tee. When there is abnormally no fluid in the valve body at the front end of the air inlet 1, the fluid at the air inlet 2 will push the spherical piston to move toward port 1, thereby sealing port 1.
[0008] The left end of V1, V2, and V3 is the exhaust end. Its function is that when the valve body is closed, the fluid inside the outlet end can be discharged through this port without causing suffocation.
[0009] In order to realize a truly 2OO3 redundant system, this solution adopts a new flow channel design and integrates three pilot solenoid valves (hereinafter referred to as solenoid valves) at the corresponding flow channel points. Only switching signals need to be equipped for these three solenoid valves.
[0010] Beneficial effects: The features of the 2OO3 pilot solenoid valve redundant system of the utility model are:
[0011] 1. The utility model system has only three pilot solenoid valves, and only switching signals need to be provided to the three solenoid valves, which can achieve lower costs.
[0012] 2. A mechanical valve body is integrated in the system of the utility model, so that when any two of the three pilot solenoid valves are in normal state, the normal operation of the entire system can be guaranteed.
[0013] 3. The utility model designs a one-way valve on the pilot air path of the first pilot solenoid valve SOLENOID VALVE1, which can ensure that no blowby gas is generated on the pilot air path of the first pilot solenoid valve SOLENOID VALVE1.
[0014] 4. A SHUT VALVE is designed in the system to realize automatic switching operation of the two gas lines.
[0015] 5. The springs inside the pilot solenoid valve and mechanical valve body adopt a high-life anti-fatigue design, which can make the service life of the valve body more than 10 million times. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the structure of the gas circuit (fluid circuit) of the pilot-operated solenoid valve system of the utility model.
[0017] Figure 2 This is a schematic diagram of the faulty gas circuit structure of the pilot-operated solenoid valve V3 of the utility model;
[0018] Figure 3 This is a schematic diagram of the faulty gas circuit structure of the pilot-operated solenoid valve V2 of the utility model;
[0019] Figure 4 This is a schematic diagram of the faulty gas circuit structure of the pilot-operated solenoid valve V1 of the utility model. DETAILED DESCRIPTION
[0020] like Figure 1 As shown, it includes three pilot solenoid valves V1, V2, and V3, a mechanical valve MV, and a reversing shuttle valve S1; a second reversing shuttle valve S2 is also provided, and the first and second ports of the second reversing shuttle valve are respectively connected to the outlet of the third pilot solenoid valve and the outlet of the mechanical valve, and the third port (outlet) of the second shuttle valve is the outlet of the gas circuit.
[0021] The one-way valve NRV, the total inlet of the gas circuit (the lower part of the figure) INLET, the total outlet of the gas circuit (the upper part of the figure) OUTLET, the second shuttle valve or even the shuttle valve can be understood as a spherical piston added to the three-way. When the valve body at the front end of the air inlet 1 is abnormally without fluid, the fluid at the air inlet 2 will push the spherical piston to move to port 1, thereby sealing port 1. The left end of V1, V2, and V3 in the figure is the exhaust end. Its function is that when the valve body is closed, the fluid inside the outlet end can be discharged through this port without causing suffocation. The four ports ABCD are pressure indicators (), and their function is to inform customers through pressure indicators whether there are any abnormalities in the three solenoid valves and mechanical valves.
[0022] 1. Figure 2 As shown, gas circuit description:
[0023] When the input end (INLET) is ventilated, the thick solid line generates air pressure. When SOLENOID VALVE1, i.e., V1, and SOLENOID VALVE2, i.e., V2, can ventilate normally, and SOLENOID VALVE3, i.e., V3, is abnormal, the medium flowing through the solenoid valve V1 opens and enters the sealing chamber of the mechanical valve MV, thereby opening the flow channel of the mechanical valve MV. At the same time, the medium flowing through the solenoid valve V2 opens and enters the flow channel of the mechanical valve MV and then enters the second shuttle valve S2 (equivalent to adding a spherical piston to the three-way valve. If the pressure on one side is high, the piston is pushed to move to the other side. The piston makes the pipeline with high pressure conduct to the output), and finally realizes the passage of the system (see Figure 2 , the thin solid line represents the part where the pipeline is open, and the dotted line represents the part where the pipeline is blocked).
[0024] 2. Figure 3 As shown, the gas circuit description is: when the input end (INLET) is ventilated, the thick solid circuit generates air pressure. When SOLENOIDVALVE1 and SOLENOID VALVE3 can be ventilated normally, and SOLENOID VALVE2 is abnormal, the medium circulated by the solenoid valve V1 opens the valve and enters the sealing chamber of the mechanical valve MV, thereby opening the flow channel of the mechanical valve MV. At the same time, the medium circulated by the solenoid valve V1 also passes through an inlet of the first reversing shuttle valve S1, and then enters the inlet of the solenoid valve V3 from the outlet of the first reversing shuttle valve S1. At this time, the solenoid valve V3 is energized and open, and the medium entering from the outlet of the first reversing shuttle valve S1 can enter the second reversing shuttle valve S2 through the solenoid valve V3, and finally realize the passage of the system (see Figure 3 , the thin solid line represents the part where the pipeline is open, and the dotted line represents the part where the pipeline is blocked).
[0025] 3. Figure 4As shown, the gas circuit description: when the input end (INLET) is ventilated, the thick solid circuit generates air pressure. When SOLENOIDVALVE2 and SOLENOID VALVE3 can be ventilated normally, and SOLENOID VALVE1 is abnormal, the medium circulated by the solenoid valve V2 opens and enters an inlet of the first reversing shuttle valve S1 and the first inlet of the mechanical valve MV. However, because the solenoid valve V1 is abnormal, the circulating medium does not enter the piston chamber of the mechanical valve MV, and it is impossible to promote the flow channel switching of the mechanical valve MV. At this time, although the circulating medium at the outlet of the second solenoid valve V2 also flows to the second inlet of the mechanical valve MV synchronously, because the flow channel of the mechanical valve MV is not switched, there is no circulating medium at the second outlet of the mechanical valve MV. After the medium circulated by the solenoid valve V2 opens and enters an inlet of the first reversing shuttle valve S1, it will continue to enter the inlet of the solenoid valve V3 from the outlet of the first reversing shuttle valve S1. At this time, the solenoid valve V3 is in the power-on open state, and the medium entering from the outlet of the first reversing shuttle valve S1 can enter the second reversing shuttle valve S2 through the solenoid valve V3. Finally, the system path is realized (see Figure 4 , the thin solid line represents the part where the pipeline is open, and the dotted line represents the part where the pipeline is blocked).
[0026] 4. In addition to the above introduction, the pilot solenoid valve 2OO3 redundant system has other on-off conditions, as shown in Table 1.
[0027]
[0028]
[0029] The above-mentioned embodiments only express the implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the attached claims.
Claims
1. A pilot-operated solenoid valve redundant system, characterized in that: It includes three pilot solenoid valves, a mechanical valve and a reversing shuttle valve; the first and second pilot solenoid valves are connected in parallel, the outlets of the first and second pilot solenoid valves are connected to the first and second ports of the reversing shuttle valve through an air circuit, the third port of the reversing shuttle valve is connected to the inlet of the third pilot solenoid valve, and a one-way valve is connected in series to the first pilot solenoid valve; the mechanical valve is a valve with two inlets and two outlets, the first outlet of the first pilot solenoid valve is connected to the first inlet of the mechanical valve, the first outlet of the second pilot solenoid valve is connected to the second inlet of the mechanical valve, and the second inlet of the mechanical valve has a flow channel connected to the first outlet of the mechanical valve and connected to the second inlet of the second reversing shuttle valve; the second outlets of the first and second pilot solenoid valves are interconnected and connected to a muffler; the second outlet of the mechanical valve is interconnected with the second outlet of the third pilot solenoid valve and connected to the muffler; the first outlet of the third pilot solenoid valve is connected to the first inlet of the second reversing shuttle valve.
2. The redundant system according to claim 1, characterized in that: A second shuttle valve is provided, the first and second ports of the second shuttle valve are respectively connected to the outlet of the third pilot electromagnetic valve and the outlet of the mechanical valve, and the third port of the second shuttle valve is the outlet of the gas circuit.