A pressure protection valve system

Abstract

The embodiment of the application provides a pressure protection valve system, which comprises a first signal generator, a second signal generator, a pressure protection valve, a signal receiver and a valve; the pressure protection valve is provided with a one-way air flow valve, one end of the one-way air flow valve is a forward flow inlet, the other end of the one-way air flow valve is a reverse flow inlet, the forward flow inlet is connected with a fresh air outlet and a waste discharge outlet, and the forward flow inlet is provided with a valve; the signal receiver is connected with the valve; the forward flow inlet is opened or closed through the valve, so that the closed property of a vehicle compartment is improved, the pressure difference in the vehicle compartment is balanced, the ear pressure is reduced, and the comfort of passengers is improved.

Description

TECHNICAL FIELD

[0001] The embodiments of the present application relate to the field of protection valves, in particular to a pressure protection valve system. BACKGROUND

[0002] Due to the air tightness of the car, when a high-speed train passes through a tunnel, there will be a large pressure fluctuation and noise in the car, which is manifested as a decrease or increase in the pressure in the car and a large sound pressure level, which can easily cause discomfort to passengers. SUMMARY

[0003] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0004] The purpose of the present application is to at least partially solve one of the technical problems existing in the related art. The embodiments of the present application provide a pressure protection valve system, which balances the pressure difference in the car through the valve switch forward flow inlet.

[0005] In an embodiment of the present application, a pressure protection valve system comprises:

[0006] a first signal generator;

[0007] a second signal generator;

[0008] a pressure protection valve, the pressure protection valve is provided with a one-way air flow valve, one end of the one-way air flow valve is a forward flow inlet, the other end of the one-way air flow valve is a reverse flow inlet, the forward flow inlet is connected with a fresh air outlet and a waste outlet, and the forward flow inlet is provided with a valve for opening and closing the forward flow inlet;

[0009] a signal receiver, the signal receiver is connected with the valve, and the signal receiver is used to receive signals sent by the first signal generator and the second signal generator.

[0010] According to some embodiments of the present application, when the signal receiver receives a closing signal sent by the first signal generator, the valve is closed; and when the signal receiver receives an opening signal sent by the second signal generator, the valve is opened.

[0011] According to some embodiments of the present application, the first signal generator is installed at the tunnel inlet.

[0012] According to some embodiments of the present application, the second signal generator is installed at the tunnel outlet.

[0013] According to some embodiments of the present application, the one-way air flow valve comprises a plurality of sub-valves, and the plurality of sub-valves are connected in sequence.

[0014] According to some embodiments of the present application, the sub-valve comprises a straight main channel, and a curved loop, a flow outlet and a return outlet are arranged on the side of the main channel, the flow outlet is communicated with one end of the loop, and the return outlet is communicated with the other end of the loop.

[0015] According to some embodiments of the present application, the loop comprises a straight loop and an arc loop, one end of the straight loop is connected with the flow outlet, the other end of the straight loop is connected with one end of the arc loop, the straight loop extends obliquely from the flow outlet to the return outlet, and the other end of the arc loop is connected with the return outlet.

[0016] According to some embodiments of the present application, the sub-valve is provided with a plurality of flow outlets, a plurality of return outlets and a plurality of loops, and the number of the flow outlets, the return outlets and the loops is the same.

[0017] According to some embodiments of the present application, the signal receiver is connected with a processor, and the processor is connected with the valve.

[0018] According to some embodiments of the present application, the valve is an electromagnetic valve.

[0019] The above scheme has at least the following beneficial effects: when the train enters the tunnel, the electromagnetic valve closes the positive flow port of the pressure protection valve connected with the fresh air outlet and the exhaust outlet, the gas in the train cabin cannot flow out reversely due to the one-way conduction of the Tesla valve, that is, cannot flow out from the reverse flow inlet; and the external gas cannot flow in from the positive flow inlet. Therefore, the pressure in the train cabin cannot be suddenly increased or decreased, the pressure difference in the train cabin is balanced, the sound pressure is reduced, and the riding experience of passengers is improved. When the train leaves the tunnel, the electromagnetic valve opens the positive flow port, and the external air flows into the train cabin through the positive flow port again, and the normal air intake and exhaust of the train are restored. Due to the large pressure difference between the positive flow inlet and the reverse flow inlet of the Tesla valve, the air flowing in from the positive flow inlet can be accelerated, and the air can quickly flow into the fresh air outlet and flow out of the exhaust outlet when the valve is opened, reducing the exhaust gas in the train cabin. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the technical scheme of the present application, and constitute a part of the specification, and are used together with the embodiments of the present application to explain the technical scheme of the present application, and do not constitute a limitation on the technical scheme of the present application.

[0021] Figure 1 is an internal structure diagram of the pressure protection valve;

[0022] Figure 2 is an internal structure diagram of the sub-valve. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0024] It should be noted that although the functional modules are divided in the device schematic diagram, and the logical sequence is shown in the flowchart, in some cases, the steps shown or described can be performed in a manner different from the module division in the device or the sequence in the flowchart. The terms "first", "second", etc. in the specification, claims or above-described drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

[0025] Due to the air tightness of the car body, when a high-speed train passes through a tunnel, there will be a large pressure fluctuation and noise in the car body, which is manifested as a decrease or increase in the pressure in the car body and a large sound pressure level, which is easy to cause passenger discomfort.

[0026] In order to solve the above problems, the embodiments of the present application provide a pressure protection valve system. A pressure fluctuation detection means is used to close the fresh air and exhaust valves of the EMU air conditioning system by using the pressure protection valve, so as to isolate the inside and outside of the train.

[0027] The embodiments of the present application will be further described below with reference to the drawings.

[0028] The pressure protection valve system comprises a first signal generator, a second signal generator, a pressure protection valve, a signal receiver, a valve and a processor.

[0029] The pressure protection valve is provided with a one-way air flow valve 100, one end of the one-way air flow valve 100 is a forward flow inlet 210, the other end of the one-way air flow valve 100 is a reverse flow inlet 220, the forward flow inlet 210 is connected with a fresh air outlet and an exhaust outlet, and the forward flow inlet 210 is provided with a valve for opening and closing the forward flow inlet 210; the signal receiver is connected with the valve, and the signal receiver is used to receive the signals sent by the first generator and the second generator.

[0030] The first signal generator is installed at the tunnel inlet. The second signal generator is installed at the tunnel outlet.

[0031] The signal receiver is connected with the processor, and the processor is connected with the valve.

[0032] When the signal receiver receives the closing signal sent by the first signal generator, the signal receiver sends the closing signal to the processor, and the processor controls the valve to close according to the closing signal; when the signal receiver receives the opening signal sent by the second signal generator, the signal receiver sends the opening signal to the processor, and the processor controls the valve to open according to the opening signal.

[0033] The forward flow inlet 210 and the reverse flow inlet 220 are each provided with a funnel-shaped device.

[0034] With reference to Figure 1 For the one-way air flow valve 100, the one-way air flow valve 100 is based on the Tesla valve principle. The Tesla valve is a one-way air flow valve 100 characterized by the absence of any moving parts, and only uses the spatial structure to push the gas flow, without the need for input energy to achieve the one-way air flow characteristics of the fluid.

[0035] The Tesla valve principle is that the forward flow and the reverse flow of the fluid are very different. When the fluid flows forward, the fluid can bypass all wing-shaped obstacles and flow freely from the right to the left, and the fluid is accelerated due to the flow pressure. However, when the fluid flows reversely, the fluid enters a wing-shaped obstacle upward / downward after passing through each channel. The backflow causes the flow to be blocked and the pressure head to be increased, which hinders the overall forward flow of the fluid. The more wing-shaped obstacles there are, the greater the resistance to the forward flow of the fluid, which leads to the unique one-way air flow effect of the Tesla valve.

[0036] With reference to Figure 2 The one-way air flow valve 100 includes a plurality of sub-valves 110 connected in sequence. The sub-valve 110 includes a straight main channel 111 and a curved loop 112. The side of the main channel 111 is provided with a flow outlet 121 and a backflow port 122. The flow outlet 121 is in communication with one end of the loop 112, and the backflow port 122 is in communication with the other end of the loop 112. The loop 112 includes a straight loop 113 and an arc-shaped loop 114. One end of the straight loop 113 is connected to the flow outlet 121, and the other end of the straight loop 113 is connected to one end of the arc-shaped loop 114. The straight loop 113 extends obliquely from the flow outlet 121 to the backflow port 122. The other end of the arc-shaped loop 114 is connected to the backflow port 122.

[0037] The sub-valve 110 is provided with a plurality of flow outlets 121, a plurality of backflow ports 122, and a plurality of loops 112. The number of the flow outlets 121, the backflow ports 122, and the loops 112 is the same. The plurality of loops 112 can increase the resistance and avoid air backflow.

[0038] Specifically, the valve is an electromagnetic valve.

[0039] When the train enters the tunnel with complex environment (strong wind and sand, high altitude), the first signal generator installed at the entrance of the tunnel sends a closing signal. When the signal receiver receives the closing signal sent by the first signal generator, the signal receiver sends a closing signal to the processor. The processor controls the electromagnetic valve to close according to the closing signal. The electromagnetic valve closes the positive flow port of the pressure protection valve connected to the fresh air inlet and the exhaust outlet. The gas in the car cannot flow out in reverse direction due to the one-way conductivity of the Tesla valve, that is, it cannot flow out from the reverse flow inlet 220. Moreover, the external gas cannot flow into the positive flow inlet 210. Therefore, the pressure in the car will not increase or decrease suddenly, the pressure difference in the car is balanced, the sound pressure is reduced, and the riding experience of passengers is improved.

[0040] When the train exits the tunnel, the second signal generator installed at the exit of the tunnel sends an opening signal. When the signal receiver receives the opening signal sent by the second signal generator, the signal receiver sends an opening signal to the processor. The processor controls the valve to open according to the opening signal. The electromagnetic valve opens the positive flow port. The external air flows into the car through the positive flow port again, and the normal air intake and exhaust of the train is restored. Due to the large pressure difference between the positive flow inlet 210 and the reverse flow inlet 220 of the Tesla valve, the air flowing into the positive flow inlet 210 can be accelerated. When the valve is opened, the air can quickly flow into the fresh air inlet and flow out of the exhaust outlet, reducing the exhaust gas in the car.

[0041] The above is a specific description of the preferred embodiment of the present application, but the present application is not limited to the embodiment. Those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application. These equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. A pressure protection valve system, characterized in that, include: A first signal generator is installed at the tunnel entrance; A second signal generator is installed at the tunnel exit; A pressure protection valve is provided with a one-way airflow valve. One end of the one-way airflow valve is a forward flow inlet, and the other end is a reverse flow inlet. The forward flow inlet is connected to the fresh air inlet and the waste air outlet. The forward flow inlet is provided with a valve for opening and closing the forward flow inlet. A signal receiver, connected to the valve, is used to receive signals emitted by the first signal generator and signals emitted by the second signal generator; When the signal receiver receives a shutdown signal from the first signal generator, the valve closes. The valve closes the forward flow port of the pressure protection valve connected to the fresh air inlet and the exhaust outlet, preventing gas inside the carriage from flowing out through the reverse flow port and preventing external gas from flowing in through the forward flow port. This prevents sudden increases or decreases in pressure inside the carriage and maintains a pressure differential balance. When the signal receiver receives an opening signal from the second signal generator, the valve opens, opening the forward flow port. External air flows back into the carriage through the forward flow port and is accelerated, allowing air to quickly flow into the fresh air inlet and out of the exhaust outlet, reducing exhaust gas inside the carriage.

2. The pressure protection valve system according to claim 1, characterized in that, The unidirectional airflow valve includes multiple sub-valves, which are connected in sequence.

3. The pressure protection valve system according to claim 2, characterized in that, The sub-valve includes a straight main channel and a curved loop. The main channel has an outlet and a return port on its side. The outlet is connected to one end of the loop, and the return port is connected to the other end of the loop.

4. A pressure protection valve system according to claim 3, characterized in that, The circuit includes a straight circuit and an arc circuit. One end of the straight circuit is connected to the outlet, and the other end of the straight circuit is connected to one end of the arc circuit. The straight circuit extends obliquely from the outlet to the return port, and the other end of the arc circuit is connected to the return port.

5. A pressure protection valve system according to claim 4, characterized in that, The sub-valve is provided with multiple flow outlets, multiple return ports, and multiple loops, and the number of flow outlets, return ports, and loops is the same.

6. A pressure protection valve system according to claim 1, characterized in that, The signal receiver is connected to the processor, and the processor is connected to the valve.

7. A pressure protection valve system according to claim 1, characterized in that, The valve is a solenoid valve.

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