Emergency stop solenoid valve 2oo3 redundancy control device
By employing a 2oo3 redundant control device with four two-position three-way solenoid valves in the emergency stop system, the problems of high false stop rate or high hidden failure rate in the existing system are solved, achieving higher safety and availability.
Patent Information
- Application Number
- CN202520045783.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2035-01-09
AI Technical Summary
The redundant control devices in existing emergency parking systems suffer from high rates of false parking errors or hidden failures, affecting safety and availability.
An emergency stop solenoid valve 2oo3 redundant control device is adopted, which forms three redundant channels through four two-position three-way solenoid valves. The "two out of three" voting method is adopted. When two channels are closed, emergency stop is performed. The minority obeys the majority principle, which reduces the failure rate and increases safety and availability.
This reduces the failure rate of solenoid valves in emergency situations, improves the safety and availability of the system, and meets the highest level of safety control requirements.
Smart Images
Figure CN223664931U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the emergency stop control technical field relates to an emergency stop solenoid valve 2oo3 redundancy control device. BACKGROUND
[0002] Emergency stop system is also commonly known as safety instrument system, which is set for the safety of production process, and is specially used for the control system of interlocking and emergency stop of dangerous place. Emergency stop solenoid valve is an important component of safety instrument system. Safety instrument system adopts the structure composed of detection element, logic unit and execution element. In safety instrument system, the final execution element, emergency stop valve, is the last line of defense for process exception. When the production device appears emergency, the safety instrument system directly sends a protection interlocking signal to carry out safety protection to the field equipment, so as to avoid the spread of danger and cause huge loss. The main factor affecting the reliability of emergency stop is that the solenoid valve may be stuck, corroded or blocked by foreign matter, which accounts for more than 55% of the failure rate of the entire safety system. The conventional setting of domestic safety instrument system is generally 1oo2 (dual two-to-one voting) redundancy system or 2oo2 (dual two-to-two voting) redundancy system. The main problems existing in this conventional emergency stop method are:
[0003] 1oo2 redundancy system, any fault of the channel will lead to system shutdown, since both channels can lead to shutdown, although its safety is high, but the false shutdown rate is high.
[0004] 2oo2 (dual two-to-two voting) redundancy system, both channels must be faulty to cause shutdown, so the false shutdown rate is low, but if there is a hidden fault in one channel of the two-to-two system, it may cause system failure and lead to danger (high hidden fault rate). INVENTION CONTENTS
[0005] The utility model aims at the problems existing in the prior art, and provides an emergency stop solenoid valve 2oo3 redundancy control device.
[0006] Therefore, the utility model takes the following technical scheme:
[0007] The utility model relates to an emergency parking electromagnetic valve 2oo3 redundancy control device, including single -action pneumatic diaphragm actuator, first gas pipe is connected with the single -action pneumatic diaphragm actuator, first two -way three -way electromagnetic valve is connected with the first gas pipe, second gas pipe and third gas pipe are connected with the first two -way three -way electromagnetic valve, second two -way three -way electromagnetic valve is connected with the second gas pipe, third two -way three -way electromagnetic valve is connected with the third gas pipe, fourth gas pipe is connected with the second two -way three -way electromagnetic valve, fourth two -way three -way electromagnetic valve is connected with the fourth gas pipe, the middle part of the fourth gas pipe is connected with fifth gas pipe, and the fifth gas pipe is connected with the third two -way three -way electromagnetic valve.
[0008] Further, the fourth two-way three-way electromagnetic valve is connected with a first gas inlet pipe, the first gas inlet pipe is connected with a gas source, the gas source is connected with a second gas inlet pipe, and the second gas inlet pipe is connected with the third two-way three-way electromagnetic valve.
[0009] Further, the second two-way three-way electromagnetic valve is connected with an exhaust main pipe, the exhaust main pipe is connected with an exhaust branch pipe, the exhaust branch pipe is connected with the third two-way three-way electromagnetic valve, and an exhaust valve is arranged on the exhaust main pipe.
[0010] The utility model discloses a beneficial effect lies in: three redundancy channels are formed by four two -way three -way electromagnetic valves, when emergency occurs, if two channels are closed, then stop the gas transmission to single -action pneumatic diaphragm actuator, and then execute emergency parking, if only one channel is closed, then it continues to transmit the gas to single -action pneumatic diaphragm actuator with channel and does not execute emergency parking, according to the principle of minority submits to majority, namely " two out of three " voting mode, satisfy the highest grade requirement of industry to safety control, both reduce the requirement failure rate of electromagnetic valve, also increase electromagnetic valve security and availability, and the requirement of availability and security is considered. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 It is structure schematic drawing of the utility model;
[0012] In the drawing, 1-single -action pneumatic diaphragm actuator, 2-first gas pipe, 3-first two -way three -way electromagnetic valve, 4-second gas pipe, 5-third gas pipe, 6-second two -way three -way electromagnetic valve, 7-third two -way three -way electromagnetic valve, 8-fourth gas pipe, 9-fourth two -way three -way electromagnetic valve, 10-fifth gas pipe, 11-first gas inlet pipe, 12-gas source, 13-second gas inlet pipe, 14-exhaust main pipe, 15-exhaust branch pipe, 16-exhaust valve. DETAILED DESCRIPTION
[0013] The utility model will be described in detail below in combination with the drawings:
[0014] For example, Figure 1As shown, an emergency parking electromagnetic valve 2oo3 redundancy control device, including a single-acting pneumatic diaphragm actuator 1, pneumatic diaphragm actuator 1, namely emergency stop valve, single-acting pneumatic diaphragm actuator 1 is connected with first gas pipe 2, first gas pipe 2 is connected with first two-position three-way electromagnetic valve 3, specifically, first gas pipe 2 is connected with the A port of first two-position three-way electromagnetic valve 3, the T and P ports of first two-position three-way electromagnetic valve 3 are connected with second gas pipe 4 and third gas pipe 5 respectively, second gas pipe 4 is connected with second two-position three-way electromagnetic valve 6, second gas pipe 4 is connected with the A port of second two-position three-way electromagnetic valve 6, third gas pipe 5 is connected with third two-position three-way electromagnetic valve 7, specifically, third gas pipe 5 is connected with the A port of third two-position three-way electromagnetic valve 7, the P port of second two-position three-way electromagnetic valve 6 is connected with fourth gas pipe 8, fourth gas pipe 8 is connected with fourth two-position three-way electromagnetic valve 9, specifically, fourth two-position three-way electromagnetic valve 9 is connected with the A port, the middle part of fourth gas pipe 8 is connected with fifth gas pipe 10, and fifth gas pipe 10 is connected with the T port of third two-position three-way electromagnetic valve 7.
[0015] In addition, the P port of the fourth two-position three-way electromagnetic valve 9 is connected with the first gas inlet pipe 11, the first gas inlet pipe 11 is connected with the gas source 12, the gas source 12 can adopt a gas cylinder or other existing conventional gas source, the gas source 11 is connected with the second gas inlet pipe 13, the second gas inlet pipe 13 is connected with the P port of the third two-position three-way electromagnetic valve 7, the T port of the second two-position three-way electromagnetic valve 6 is connected with the exhaust main pipe 14, the exhaust main pipe 14 is connected with the exhaust branch pipe 15, and the exhaust branch pipe 15 is connected with the T port of the fourth two-position three-way electromagnetic valve 9, and the exhaust valve 16 is arranged on the exhaust main pipe 15.
[0016] When the gas in the gas source 12 can be input to the single-acting pneumatic diaphragm actuator 1, the system can be normally operated, when the gas in the gas source cannot be input to the single-acting pneumatic diaphragm actuator 1, parking can be performed, and the signals detected by the corresponding instruments can be transmitted to the control, and the first two-position three-way electromagnetic valve 3, the second two-position three-way electromagnetic valve 6, the third two-position three-way electromagnetic valve 7 and the fourth two-position three-way electromagnetic valve 9 are controlled to act, so that the single-acting pneumatic diaphragm actuator 1 is switched.
[0017] The device forms three channels to input gas to the single-acting pneumatic diaphragm actuator 1, the first channel is the second gas inlet pipe 13, the third gas pipe 5 and the first gas pipe 2, the second channel is the first gas inlet pipe 11, the fourth gas pipe 8, the second gas pipe 4 and the first gas pipe 2, and the third channel is the first gas inlet pipe 11, the fifth gas pipe 10, the third gas pipe 5 and the first gas pipe 2, and the opening or closing of each gas pipe can be controlled by switching the two-position three-way electromagnetic valve.
[0018] The use mode of the utility model is as follows:
[0019] When the fourth two-way three-way electromagnetic valve 9 cuts off the first inlet pipe 11 (i.e. connects the T port), and the first two-way three-way electromagnetic valve 3 cuts off the third inlet pipe 5 (i.e. connects the T port), the gas in the gas source 12 cannot be transported to the single-acting pneumatic diaphragm actuator 1 through the first inlet pipe 11 or the second inlet pipe 12 to execute the stop operation, i.e. when the fourth two-way three-way electromagnetic valve 9 and the first two-way three-way electromagnetic valve 3 execute the switching operation, the vehicle stops.
[0020] When the fourth two-way three-way electromagnetic valve 9 cuts off the first inlet pipe 11, the third two-way three-way electromagnetic valve 7 cuts off the second inlet pipe 13, and the second two-way three-way electromagnetic valve 6 cuts off the fourth inlet pipe 8, the gas in the gas source 12 cannot be transported to the single-acting pneumatic diaphragm actuator 1 through the first inlet pipe 11 or the second inlet pipe 12 to execute the stop operation, i.e. when the fourth two-way three-way electromagnetic valve 9, the third two-way three-way electromagnetic valve 7, and the second two-way three-way electromagnetic valve 6 execute the switching operation, the vehicle stops.
[0021] When the second two-way three-way electromagnetic valve 6 cuts off the fourth inlet pipe 8 and the third two-way three-way electromagnetic valve 7 cuts off the second inlet pipe 13 (i.e. connects the T port), the gas in the gas source 12 can be input to the single-acting pneumatic diaphragm actuator 1 through the first inlet pipe 11, the fifth inlet pipe 10, the third inlet pipe 5, and the first inlet pipe 2, so no stop operation is executed.
[0022] When an emergency occurs, if two channels are closed, the device stops supplying gas to the single-acting pneumatic diaphragm actuator, and then executes emergency stop; if only one channel is closed, the device continues to supply gas to the single-acting pneumatic diaphragm actuator through the channel and does not execute emergency stop, i.e. except for the case where the fourth two-way three-way electromagnetic valve 9 cuts off the first inlet pipe 11 and the first two-way three-way electromagnetic valve 3 cuts off the third inlet pipe 5, the remaining cases require three two-way three-way electromagnetic valves to execute the cutting operation to stop the vehicle, which implements the principle of minority submission to majority, reduces the required failure rate of the electromagnetic valve, increases the safety and availability of the electromagnetic valve, and balances the requirements of availability and safety.
Claims
1. An emergency stop solenoid valve 2oo3 redundancy control device characterized by, The single-acting pneumatic film actuator (1) is connected with a first gas supply pipe (2), the first gas supply pipe (2) is connected with a first two-position three-way electromagnetic valve (3), the first two-position three-way electromagnetic valve (3) is connected with a second gas supply pipe (4) and a third gas supply pipe (5), the second gas supply pipe (4) is connected with a second two-position three-way electromagnetic valve (6), the third gas supply pipe (5) is connected with a third two-position three-way electromagnetic valve (7), the second two-position three-way electromagnetic valve (6) is connected with a fourth gas supply pipe (8), the fourth gas supply pipe (8) is connected with a fourth two-position three-way electromagnetic valve (9), the fourth gas supply pipe (8) is connected with a fifth gas supply pipe (10) in the middle, and the fifth gas supply pipe (10) is connected with the third two-position three-way electromagnetic valve (7).
2. The emergency parking solenoid valve 2oo3 redundancy control device according to claim 1, characterized by, The fourth two-position three-way electromagnetic valve (9) is connected with a first gas inlet pipe (11), the first gas inlet pipe (11) is connected with a gas source (12), the gas source (12) is connected with a second gas inlet pipe (13), and the second gas inlet pipe (13) is connected with the third two-position three-way electromagnetic valve (7).
3. The emergency parking solenoid valve 2oo3 redundant control device according to claim 1, characterized by, The second two-position three-way electromagnetic valve (6) is connected with an exhaust main pipe (14), the exhaust main pipe (14) is connected with an exhaust branch pipe (15), the exhaust branch pipe (15) is connected with the third two-position three-way electromagnetic valve (7), and the exhaust main pipe (14) is provided with an exhaust valve (16).