CN217382530U

CN217382530U - Emergency closing device for hydrogen mixed gas transmission and distribution system

Info

Publication number: CN217382530U
Application number: CN202220117807.3U
Authority: CN
Inventors: 曹莹; 任春嫒
Original assignee: Shuifa Paisi Gas Co ltd
Current assignee: Shuifa Paisi Gas Co ltd
Priority date: 2022-01-17
Filing date: 2022-01-17
Publication date: 2022-09-06
Anticipated expiration: 2032-01-17

Abstract

The utility model relates to an emergency shutdown device technical field especially relates to an emergency shutdown device for hydrogen mixes gas transmission and distribution system, including the emergency shutdown valve, the delay notes bypass valve of being connected with emergency shutdown valve both ends, be equipped with valve position switch on the emergency shutdown valve, still include the fast valve of arranging, fast valve one end of arranging is connected with the emergency shutdown valve, the other end and first three-way valve connection, the second three-way valve is connected respectively at the other both ends of first three-way valve, first solenoid valve, the second solenoid valve is connected respectively at the other both ends of first solenoid valve, instrument air treatment trigeminy piece is given vent to anger the end, instrument air treatment trigeminy piece is connected to the second solenoid valve other end and is given vent to the end, instrument air treatment trigeminy piece is admitted to the end and is connected with instrument air block valve. The utility model can cut off the air source when the transmission and distribution system has the events of leakage, fire and the like, and ensure the safety of the downstream equipment; and reduces the risk of failure of a failed or mis-closed emergency shutdown valve.

Description

Emergency closing device for hydrogen mixed gas transmission and distribution system

Technical Field

The utility model relates to an emergency shutdown technical field especially relates to an emergency shutdown device that is used for hydrogen to mix gas transmission and distribution system.

Background

Emergency Shutdown (ESD) devices are widely used in hydrogen-blended gas distribution systems as important safety shut-off devices. The hydrogen has the characteristics of large diffusion coefficient, wide explosion limit, low ignition temperature and the like, and once leakage, fire or other emergencies occur in a transmission and distribution system, the gas source needs to be cut off to ensure the safety of downstream equipment and the like; meanwhile, an Emergency Shutdown (ESD) device is usually in a failure-closed position, and once a valve is closed by mistake, air supply of downstream equipment and the like is interrupted, so that the equipment is shut down accidentally, and unnecessary economic loss and fine compensation are brought. Therefore, the stability, reliability, safety of Emergency Shutdown (ESD) devices are of paramount importance.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an emergency closing device for hydrogen gas mixes gas transmission and distribution system when the transmission and distribution system takes place to leak, conflagration or other emergency, can cut off hydrogen, natural gas or gas mixture air supply, guarantees low reaches equipment safety.

In order to realize the purpose, the utility model discloses a technical scheme be:

the utility model provides an emergency shutdown device for hydrogen mixes gas transmission and distribution system, includes emergency shutdown valve, the slow notes bypass valve of pipe connection is passed through with emergency shutdown valve both ends still be provided with the valve position switch on the emergency shutdown valve, still include the fast escape valve, fast escape valve one end is connected with emergency shutdown valve, and the other end and first three-way valve connection, second three-way valve, first solenoid valve are connected respectively to the other both ends of first three-way valve, the other both ends of first solenoid valve are connected second solenoid valve, instrument air treatment trigeminy piece respectively and are given vent to anger the end, the instrument air treatment trigeminy piece is connected to the second solenoid valve other end and is given vent to anger the end, the second three-way valve other end also gives vent to anger with instrument air treatment trigeminy piece and holds to be connected, instrument air treatment trigeminy piece inlet end and instrument air block valve are connected.

Further, the instrument air treatment triple piece comprises a pressure gauge, a pressure reducer and a filter which are connected in sequence.

Furthermore, the emergency shut-off valve is a partition ball valve, and the partition ball valve is provided with a pneumatic actuating mechanism.

Further, the first solenoid valve and the second solenoid valve are both solenoid valves with isolation valves.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses an emergency shutdown device for hydrogen gas mixes gas transmission and distribution system has following beneficial effect:

1. when the transmission and distribution system leaks, fires or other emergencies, the hydrogen, natural gas or mixed gas source can be cut off, and the safety of downstream equipment is ensured;

2. the device greatly reduces the failure risk of refusing to operate or closing by mistake of the emergency shut-off valve, and has obvious practical significance;

3. the electromagnetic valve in the device is an electromagnetic valve with an isolation valve, and the electromagnetic valve can be isolated, replaced and maintained on line without influencing the work of downstream equipment;

4. the device has two opening/closing functions of manual operation and electric operation.

Drawings

FIG. 1 is a schematic view of the process of the present invention;

in the figure: 101. an emergency shut-off valve; 102. a slow filling bypass valve; 103. a valve position switch; 104. a quick discharge valve; 105. a second three-way valve; 106. a first three-way valve; 107. a second solenoid valve; 108. a first solenoid valve; 109. an instrument air handling triplet; 110. an instrument air block valve.

Detailed Description

The following describes in detail embodiments of the present invention with reference to the drawings.

As shown in fig. 1, the utility model discloses an emergency closing device for a hydrogen gas mixing transmission and distribution system, which comprises an emergency shut-off valve 101 and a slow filling bypass valve 102 connected with two ends of the emergency shut-off valve 101 through pipelines, wherein the emergency shut-off valve 101 is a partition ball valve with a pneumatic actuator, and the slow filling bypass valve 102 is a ball valve with a slow filling function; still be provided with valve position switch 103 on the emergency shutdown valve 101, the utility model discloses still include quick-witted 104 of arranging, quick-witted 104 one end of arranging is connected with emergency shutdown valve 101, and the other end is connected with first three-way valve 106, second three-way valve 105 and first solenoid valve 108 are connected respectively to first three-way valve 106 other both ends, second solenoid valve 107 and instrument air treatment trigeminy piece 109 end of giving vent to anger are connected respectively to first solenoid valve 108 other both ends, instrument air treatment trigeminy piece 109 is including manometer, pressure reducer and the filter that connects gradually, and pressure reducer one end is kept away from to the filter and is the inlet end, and pressure reducer one end is kept away from for giving vent to anger to the manometer and holds. The other end of the second electromagnetic valve 107 is connected with an air outlet end of an instrument air processing triple piece 109, the other end of the second three-way valve 105 is also connected with an air outlet end of the instrument air processing triple piece 109, and an air inlet end of the instrument air processing triple piece 109 is connected with an instrument air isolating valve 110.

When the emergency shut-off valve works actually, one end of the emergency shut-off valve 101 is connected with a hydrogen, natural gas or mixed gas inlet, and the other end of the emergency shut-off valve is connected with downstream equipment; a pressure gauge is installed between the hydrogen, natural gas or mixer inlet and the emergency shutdown valve 101, and a pressure gauge is also installed between the emergency shutdown valve 101 and downstream equipment. The emergency shutdown valve 101 is first charged through the slow fill bypass valve 102 until the upstream and downstream pressures of the emergency shutdown valve 101 are equalized. And then, an instrument air isolating valve 110 of the pneumatic actuating mechanism is opened, an air source enters an instrument air processing triple piece 109 through the instrument air isolating valve 110 at the moment, and the air source pressure output by the instrument air processing triple piece 109 is 0.5-0.7 MPag.

The manner of opening and closing the emergency shutdown valve 101 may be selected from manual or electric based on the positions of the three-way valve and the solenoid valve:

first, manual in-place: when the emergency cut-off valve 101 is operated manually, the second manual three-way valve 105 is operated at an air inlet position, namely a working position, the first manual three-way valve 106 is operated at an air inlet position, and the pneumatic actuator of the emergency cut-off valve 101 is powered on, namely the pneumatic spring is switched on; thereby opening the emergency shutdown valve 101 to supply hydrogen, natural gas or a mixture to downstream equipment; when the emergency cut-off is carried out, the manual first three-way valve 106 is operated to be at a discharge position, the pneumatic actuating mechanism of the emergency cut-off valve 101 loses air, so that the emergency cut-off valve 101 is closed, and the inlet of hydrogen, natural gas or mixed gas is cut off; the emergency shutdown valve 101 is equipped with a valve position switch 103 that can both remotely and locally indicate the valve position.

Second, electric mode: in the electric operation, the first manual three-way valve 106 is first operated to be in the intake position, i.e., the working position. When the opening button is pressed remotely, the first electromagnetic valve 108 and the second electromagnetic valve 107 are powered on to be opened, and the pneumatic actuating mechanism of the emergency shutdown valve 101 is powered on, so that the emergency shutdown valve 101 is opened, and hydrogen, natural gas or mixed gas is supplied to downstream equipment; when the emergency stop button is pressed remotely, the first electromagnetic valve 108 and the second electromagnetic valve 107 lose power, the pneumatic actuating mechanism of the emergency shut-off valve 101 loses gas, so that the emergency shut-off valve 101 is closed, and the inlet of hydrogen, natural gas or mixed gas is cut off; the emergency shutdown valve 101 is equipped with a valve position switch 103, and a signal can be remotely transmitted to an existing control system to display the corresponding on and off positions.

In addition, preferably, in order to facilitate online maintenance and repair of the first solenoid valve 108 and the second solenoid valve 107, the first solenoid valve 108 and the second solenoid valve 107 are designed as redundant solenoid valves, that is, the first solenoid valve 108 and the second solenoid valve 107 are respectively and independently provided with an isolation valve, so that the isolation valves can shield the single solenoid valve for on-site maintenance and repair without shutdown.

Preferably, for the production efficiency who improves the mill, increase economic benefits, realize the profit maximize, there is the utility model discloses the continuous operation cycle is long, the condition of the corresponding extension of time of periodic maintenance also. The emergency shutdown valve 101 may not be operated for a long time and may be in a "sleep" state, and the emergency shutdown valve 101 may not respond to the remote shutdown command to generate a "failure". The utility model discloses can set up Partial Stroke Test (PST), insert the action of partial stroke test in the periodic maintenance cycle, let the periodic partial stroke action of emergency shutdown valve 101, can carry out the valve test under the condition that does not influence technology production and unmanned on duty, judge whether its operating condition is normal. The manner of operation and function of this stroke test is well known to those skilled in the art.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An emergency shutdown device for a hydrogen-mixed gas delivery and distribution system, comprising: comprises an emergency shut-off valve (101), a slow filling bypass valve (102) which is connected with the two ends of the emergency shut-off valve (101) through pipelines, the emergency shut-off valve (101) is also provided with a valve position switch (103) and a quick-release valve (104), one end of the quick-discharging valve (104) is connected with the emergency shut-off valve (101), the other end is connected with the first three-way valve (106), the other two ends of the first three-way valve (106) are respectively connected with a second three-way valve (105) and a first electromagnetic valve (108), the other two ends of the first electromagnetic valve (108) are respectively connected with the second electromagnetic valve (107) and the air outlet end of the instrument air processing triple piece (109), the other end of the second electromagnetic valve (107) is connected with the air outlet end of the instrument air processing triple piece (109), the other end of the second three-way valve (105) is also connected with the air outlet end of the instrument air processing triple piece (109), the air inlet end of the instrument air processing triple piece (109) is connected with an instrument air isolating valve (110).

2. The emergency shutdown device for a hydrogen gas-mixed transportation and distribution system according to claim 1, characterized in that: the instrument air treatment triple piece (109) comprises a pressure gauge, a pressure reducer and a filter which are connected in sequence.

3. An emergency shutdown device for a hydrogen gas mixture delivery and distribution system as claimed in claim 1, wherein: the emergency shut-off valve (101) is a partition ball valve which is provided with a pneumatic actuating mechanism.

4. The emergency shutdown device for a hydrogen gas-mixed transportation and distribution system according to claim 1, characterized in that: the first solenoid valve (108) and the second solenoid valve (107) are both solenoid valves with isolation valves.