Stable and automatic gas supply device for hydrogen production machine under no-buffer condition

Abstract

The utility model relates to a stable and automatic gas supply device for a hydrogen production machine under a buffer-free condition, which comprises a hydrogen production device and a use terminal, and the hydrogen production device is connected with the use terminal through a conveying pipeline; the three-way valve is arranged on the conveying pipeline between the hydrogen production device and the use terminal, and a bypass valve port of the three-way valve is connected with a flame arrester through an emptying pipeline. According to the utility model, hydrogen is generated by the small-sized hydrogen production device, the gas supply pressure and the power of the hydrogen production device are adjusted under the manual operation of the three-way valve or the PLC control, the hydrogen is stably supplied to the use terminal, the hydrogen emission is reduced to the greatest extent, and the electric energy consumption is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydrogen delivery equipment technical field, specifically is about a kind of for hydrogen generator stable automatic gas supply device under no buffering condition. BACKGROUND

[0002] In the hydrogen gas using terminal of semiconductor equipment such as epitaxial furnace and other population-dense and high-security requirements cannot use tank or buffer tank to store hydrogen area;Need hydrogen production device to supply hydrogen gas to using terminal stably.

[0003] However, existing small electrolytic water hydrogen production equipment needs to be equipped with buffer tank to ensure the stability of using terminal pressure and flow under the condition of unstable gas consumption, increase storage security risk, thereby limit cannot be used in population-dense area, key area such as university laboratory etc. In addition, the gas production of hydrogen generator in the existing equipment is greater than the use amount, and the safety valve needs to discharge excess gas frequently, which not only causes waste, but also exists fire, lightning, explosion and other security risks.

[0004] Therefore, a new gas supply device is needed to solve the above problems. INVENTION CONTENTS

[0005] In view of the above problems, the utility model aims at providing a kind of for hydrogen generator stable automatic gas supply device under no buffering condition, hydrogen gas is generated in small hydrogen production device, and hydrogen gas is supplied to using terminal stably by adjusting gas supply pressure, hydrogen production device power under the control of three-way valve by hand or PLC, and hydrogen discharge is minimized, and electric energy consumption is reduced.

[0006] To achieve the above object, the utility model takes the following technical scheme:

[0007] The utility model discloses a kind of for hydrogen generator stable automatic gas supply device under no buffering condition, comprising: hydrogen production device and using terminal, the hydrogen production device and the using terminal are connected by conveying pipeline;Three-way valve is set on the conveying pipeline between the hydrogen production device and the using terminal, and the bypass valve port of the three-way valve is connected with flame arrestor by emptying pipeline.

[0008] The for hydrogen generator stable automatic gas supply device under no buffering condition preferably further includes pressure transmitter;The pressure transmitter is set on the conveying pipeline between the hydrogen production device and the using terminal, and located downstream of three-way valve;The pressure transmitter is used to detect the size of gas supply pressure and output signal.

[0009] The for hydrogen generator stable automatic gas supply device under no buffering condition preferably further includes check valve;The check valve is set on the conveying pipeline between the hydrogen production device and the three-way valve, for preventing hydrogen backflow.

[0010] The three-way valve is preferably a mechanical three-way valve, so that when the gas supply pressure passing through the three-way valve is higher than the highest emptying threshold value set by the three-way valve, the bypass valve of the three-way valve is manually opened, and when the gas supply pressure passing through the three-way valve is lower than the lowest emptying threshold value set by the three-way valve, the bypass valve of the three-way valve is manually closed.

[0011] The three-way valve is preferably a mechanical three-way valve, so that when the gas supply pressure passing through the three-way valve is higher than the highest emptying threshold value set by the three-way valve, the bypass valve of the three-way valve is manually opened, and when the gas supply pressure passing through the three-way valve is lower than the lowest emptying threshold value set by the three-way valve, the bypass valve of the three-way valve is manually closed.

[0012] The three-way valve is preferably a mechanical three-way valve, so that when the gas supply pressure passing through the three-way valve is higher than the highest emptying threshold value set by the three-way valve, the bypass valve of the three-way valve is manually opened, and when the gas supply pressure passing through the three-way valve is lower than the lowest emptying threshold value set by the three-way valve, the bypass valve of the three-way valve is manually closed.

[0013] The three-way valve is preferably a mechanical three-way valve, so that when the gas supply pressure passing through the three-way valve is higher than the highest emptying threshold value set by the three-way valve, the bypass valve of the three-way valve is manually opened, and when the gas supply pressure passing through the three-way valve is lower than the lowest emptying threshold value set by the three-way valve, the bypass valve of the three-way valve is manually closed.

[0014] The utility model discloses a following advantage because adopt above technical scheme,

[0015] (1) the utility model discloses in the population dense area, the key safety area such as college laboratory can effectively reduce the safety interval requirement and the safety examination requirement;

[0016] (2) the utility model discloses can reduce the buffer tank and the subsidiary equipment, reduce the equipment cost and the safety protection expense;

[0017] (3) the utility model discloses can reduce the hydrogen buffer tank storage, reduce the three -way valve emptying frequency, reduce the potential explosion, the fire, the thunderbolt and so on use safety risk;

[0018] (4) the utility model discloses can reduce the hydrogen discharge and the hydrogen production device electric energy consumption, reaches the purpose of energy saving and consumption reduction. BRIEF DESCRIPTION OF DRAWINGS

[0019] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments with reference made to the accompanying drawings. The drawings are for purposes of illustration only and are not considered a limitation of the present application. Throughout the drawings, the same reference designations are used for similar or like items. In the drawings:

[0020] Figure 1 is the structural schematic diagram of the utility model.

[0021] The various reference signs in the drawings are as follows:

[0022] 1-hydrogen generator; 2-conveying pipeline; 3-three-way valve; 4-evacuation pipeline; 5-flame arrester; 6-pressure transmitter; 7-check valve; 8-PLC. DETAILED DESCRIPTION

[0023] Exemplary embodiments of the present application will be described herein below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it is understood that the present application can be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0024] The present application provides a kind of for hydrogen generator stable automatic gas supply device under no buffering condition, hydrogen gas is generated by small hydrogen generator, under the control of manual or PLC, the gas supply pressure of three-way valve is adjusted, hydrogen generator power, stable hydrogen is supplied to use terminal, and maximum limit reduces hydrogen discharge, reduces electric energy consumption.

[0025] As Figure 1 As shown in the present application for hydrogen generator stable automatic gas supply device under no buffering condition, comprising: hydrogen generator 1 and use terminal, hydrogen generator 1 and use terminal are connected by conveying pipeline 2;Three-way valve 3, is arranged on the conveying pipeline 2 between hydrogen generator 1 and use terminal, the bypass valve port of three-way valve 3 is connected with flame arrester 5 by evacuation pipeline 4.

[0026] In the above embodiment, preferably, the present application further includes pressure transmitter 6;Pressure transmitter 6 is arranged on the conveying pipeline 2 between hydrogen generator 1 and use terminal, and is located downstream of three-way valve 3;Pressure transmitter 6 is used to detect the size of gas supply pressure and output signal.

[0027] In the above embodiment, preferably, the present application further includes check valve 7;Check valve 7 is arranged on the conveying pipeline 2 between hydrogen generator 1 and three-way valve 3, for preventing hydrogen backflow.

[0028] In the above embodiment, preferably, three-way valve 3 is mechanical three-way valve, so that when the gas supply pressure after three-way valve is higher than the highest evacuation threshold value set by the three-way valve, the bypass valve door of three-way valve is manually opened, and when the gas supply pressure after three-way valve is lower than the lowest evacuation threshold value set by the three-way valve, the bypass valve door of three-way valve is manually closed.

[0029] In the above embodiment, preferably, the present application further includes mechanical hand (not shown in the figure), and the mechanical hand is used to open or close the bypass valve door of three-way valve.

[0030] In the above embodiment, preferably, the three-way valve 3 is an electromagnetic valve.

[0031] In the above embodiment, preferably, the utility model further includes PLC 8;PLC is connected with three -way valve 3, pressure transmitter 6 and hydrogen production device 1 electrically or signal respectively;PLC 8 is used to adjust the opening and closing of bypass valve port of three -way valve 3 and the current size of hydrogen production device 1 according to the size of hydrogen use pressure.

[0032] Need to explain, small electrolytic water hydrogen generator: hydrogen production device. Three-way valve: three-way valve is the control part in fluid conveying system, has the functions of stop, regulation, flow guide, prevent backflow, pressure stabilization, shunt or overflow etc. Among them, hydrogen production device and three-way valve are mature components that can be directly purchased in the market, and their specific structures will not be described here.

[0033] Embodiment 1:

[0034] Manual control: if the power regulation range of hydrogen production device is current 0~1800A, the generated hydrogen pressure is 0~1.6MPa, and the use terminal gas supply pressure requirement is not less than 0.55MPa and not more than 1.0MPa, then the three-way valve emptying threshold can be set to 0.65~0.95MPa, when the gas production pressure is greater than 0.95MPa, the three-way valve bypass opens, and the hydrogen is emptied, when the production end pressure drops to 0.65MPa, the bypass valve closes and the bypass valve opens to supply gas, and in the emptying stage, the gas terminal continues to use the gas in the pipeline, and before the bypass valve opens to supply gas, the pressure in the pipeline of the use terminal needs to be higher than 0.55MPa, so that the use terminal can stably supply gas under the control of the pressure regulating valve and the flow meter.

[0035] Embodiment 2:

[0036] Automatic control: the hydrogen production device and the gas supply end pressure are each set to a center threshold value (set according to the typical amount of use), such as current 1200A and gas supply pressure 0.80MPa, when the equipment is stable, manual control is converted to automatic control, the emptying valve is started once every 5 minutes, at this time, the hydrogen production amount is greater than the use amount, and the hydrogen production device current is-50A;When the hydrogen gas supply pressure is less than or equal to 0.75MPa for more than 1 minute, the hydrogen production device current is increased by 25A per minute;When the hydrogen gas supply pressure is less than or equal to 0.70MPa for more than 1 minute, the hydrogen production device current is increased by 50A per minute;When the hydrogen gas supply pressure is greater than or equal to 0.85MPa for more than 1 minute, the hydrogen production device current is decreased by 25A per minute;When the hydrogen gas supply pressure is greater than or equal to 0.90MPa for more than 1 minute, the hydrogen production device current is decreased by 50A per minute;In turn, all pressure thresholds and time nodes need to be matched with the actual use, so that the hydrogen production amount of the hydrogen production device and the actual use amount of the equipment are matched, thereby minimizing the emptying frequency of the three-way valve.

[0037] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the present application, but not limited to; although the present application is described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still be modified to the technical solutions recorded in the foregoing examples, or part of the technical features are replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A stable automatic gas supply device for a hydrogen generator under a non-buffered condition, characterized by, The application relates to a hydrogen production device and a hydrogen use terminal connected by a delivery pipeline. A three-way valve is arranged on the delivery pipeline between the hydrogen production device and the hydrogen use terminal, and a flame arrester is connected to a bypass valve port of the three-way valve through an emptying pipeline. A pressure transmitter is further arranged.

2. The device, as claimed in claim 1, wherein, The pressure transmitter is arranged on the delivery pipeline between the hydrogen production device and the hydrogen use terminal and located downstream of the three-way valve. The pressure transmitter is used for detecting the size of a gas supply pressure and outputting a signal. A check valve is further arranged.

3. The device as claimed in claim 1, wherein, The check valve is arranged on the delivery pipeline between the hydrogen production device and the three-way valve and used for preventing hydrogen backflow. The three-way valve is a mechanical three-way valve, so that when the gas supply pressure passing through the three-way valve is higher than a highest emptying threshold value set by the three-way valve, a bypass valve door of the three-way valve is manually opened, and when the gas supply pressure passing through the three-way valve is lower than a lowest emptying threshold value set by the three-way valve, the bypass valve door of the three-way valve is manually closed.

4. The device as claimed in claim 1, wherein, A mechanical hand is further arranged for opening or closing the bypass valve door of the three-way valve.

5. The device as claimed in claim 4, wherein, The three-way valve is an electromagnetic valve.

6. The device as claimed in claim 2, wherein, A PLC is further arranged and electrically connected or signal-connected with the three-way valve, the pressure transmitter and the hydrogen production device.

7. The device, as claimed in claim 6, wherein, The PLC is used for adjusting the opening and closing of the bypass valve port of the three-way valve and the current size of the hydrogen production device according to the size of a hydrogen use pressure. ​

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