Safety interlocking device of gas chromatograph
By integrating components such as combustible gas sensors, logic controllers, and dry powder fire extinguishers into a gas chromatograph, automated handling of hydrogen leaks and rapid fire suppression are achieved, resolving safety hazards associated with gas chromatographs and improving overall safety.
Patent Information
- Application Number
- CN202520199501.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-08
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-02-08
AI Technical Summary
Existing gas chromatographs lack emergency response measures for hydrogen leaks, posing a risk of fire and explosion.
A safety interlock device for a gas chromatograph was designed, comprising a combustible gas sensor, a logic controller, hydrogen and nitrogen shut-off valves, a fire source sensor, and a dry powder fire extinguisher, to achieve automated detection, shut-off, and displacement of hydrogen leaks, as well as automatic fire extinguishing.
In the event of a hydrogen leak, the system automatically cuts off the hydrogen supply, displaces nitrogen to dilute the hydrogen, prevents an explosion, and quickly extinguishes fires to reduce fire hazards.
Smart Images
Figure CN223756236U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to gas chromatograph safety interlock device technical field, especially gas chromatograph safety interlock device. BACKGROUND
[0002] Gas chromatograph is using high purity hydrogen as carrier to carry out chromatographic analysis, and hydrogen belongs to flammable and explosive dangerous goods, and the explosion limit is extremely wide, and the existing gas chromatograph does not have the emergency disposal measure after hydrogen leakage, and once hydrogen leaks, there is the danger of fire and explosion. CONTENT
[0003] In order to solve the above technical problem, the application provides a gas chromatograph safety interlock device, the utility model is realized through the following technical scheme:
[0004] A kind of gas chromatograph safety interlock device, including gas chromatograph, hydrogen inlet is equipped on the gas chromatograph, hydrogen inlet is connected hydrogen inlet pipe, hydrogen inlet pipe is equipped with hydrogen cut-off valve at hydrogen inlet connection, nitrogen inlet is equipped on the gas chromatograph, nitrogen inlet is connected nitrogen inlet pipe, nitrogen inlet pipe is equipped with nitrogen cut-off valve at nitrogen inlet connection, combustible gas sensor is equipped between nitrogen inlet and hydrogen inlet of the gas chromatograph, the combustible gas sensor is electrically connected logic controller, the logic controller is electrically connected alarm, hydrogen cut-off valve, nitrogen cut-off valve, the alarm is fixedly installed on the gas chromatograph.
[0005] Fire source inductor is also installed on the gas chromatograph, the fire source inductor is electrically connected logic controller, the logic controller is electrically connected the starting valve of dry powder fire extinguisher, bottle valve is equipped on the dry powder fire extinguisher, spray rod is equipped on the dry powder fire extinguisher, nozzle is equipped on the spray rod, the nozzle is towards the direction of gas chromatograph.
[0006] Further, the gas chromatograph is equipped with a chromatographic column.
[0007] Further, the fire source inductor is installed close to hydrogen inlet.
[0008] Compared with prior art, the utility model has the advantages that: the utility model can monitor hydrogen leakage when hydrogen leaks in the gas chromatograph by combustible gas sensor, and the hydrogen leakage signal monitored by combustible gas sensor is uploaded to logic controller, and logic controller controls hydrogen cut-off valve and nitrogen cut-off valve to work, hydrogen cut-off valve is closed, hydrogen in hydrogen inlet pipe will not be sent into the inside of gas chromatograph, at the same time, nitrogen cut-off valve is opened, and nitrogen in nitrogen inlet pipe is filled into the inside of gas chromatograph, and hydrogen in the inside of gas chromatograph is expelled, so that the hydrogen leakage in the gas chromatograph is prevented from mixing with air to form explosive gas.
[0009] The logic controller controls the alarm to work at the same time, and the alarm emits a warning sound to attract the attention of the staff.
[0010] If a fire occurs, the fire source signal will be monitored by the fire source sensor, the fire source sensor will upload the monitored fire source signal to the logic controller, the logic controller controls the starting valve of the dry powder fire extinguisher to open, and a large amount of dry powder is sprayed out through the nozzle on the spray rod to extinguish the fire, the structure can quickly and effectively extinguish the fire, and the degree of automation is high, so that the harm caused by the fire is reduced as much as possible. BRIEF DESCRIPTION OF DRAWINGS
[0011] The utility model will be further described in detail below in combination with the specific embodiments and the drawings:
[0012] Figure 1 It is the connecting structure schematic diagram of the utility model. DETAILED DESCRIPTION
[0013] The utility model will be further described in detail below in combination with the specific embodiments and the drawings:
[0014] A gas chromatograph safety interlocking device, including gas chromatograph 1, be equipped with hydrogen inlet 2 on gas chromatograph 1, hydrogen inlet 2 is connected hydrogen inlet pipe 3, be equipped with hydrogen cut-off valve 4 at hydrogen inlet pipe 3 and hydrogen inlet 2 junction, be equipped with nitrogen inlet 5 on gas chromatograph 1, nitrogen inlet 5 is connected nitrogen inlet pipe 6, be equipped with nitrogen cut-off valve 7 at nitrogen inlet pipe 6 and nitrogen inlet 5 junction, be equipped with combustible gas sensor 8 between nitrogen inlet 5 and hydrogen inlet 2 on gas chromatograph 1, combustible gas sensor 8 is electrically connected logic controller 9, logic controller 9 is electrically connected alarm 10, hydrogen cut-off valve 4, nitrogen cut-off valve 7, alarm 10 is fixedly installed on gas chromatograph 1.
[0015] Still be equipped with fire source sensor 13 on gas chromatograph 1, fire source sensor 13 is electrically connected logic controller 9, logic controller 9 is electrically connected the starting valve 15 of dry powder fire extinguisher 14, be equipped with bottle valve 11 on dry powder fire extinguisher 14, bottle valve 15 is in the normal open state during the operation of gas chromatograph,
[0016] Be equipped with spray rod 16 on dry powder fire extinguisher 14, be equipped with nozzle 17 on spray rod 16, nozzle 17 is towards the direction of gas chromatograph 1.
[0017] Further, be equipped with chromatographic column 18 on gas chromatograph 1.
[0018] Further, fire source sensor 13 is installed near hydrogen inlet 2.
[0019] The gas chromatograph safety interlocking device, in use, once hydrogen leaks, the leaked hydrogen will be monitored by the combustible gas sensor 8, the hydrogen leakage signal monitored by the combustible gas sensor 8 is uploaded to the logic controller 9, the logic controller 9 controls the hydrogen cut-off valve 11 and the nitrogen cut-off valve 12 to work, the hydrogen cut-off valve 11 is closed, the hydrogen of the hydrogen inlet pipe 3 will no longer be sent into the inside of the gas chromatograph 1, at the same time the nitrogen cut-off valve 12 is opened, the nitrogen of the nitrogen inlet pipe 6 is filled into the inside of the gas chromatograph 1, the hydrogen in the inside of the gas chromatograph 1 is expelled, the leaked hydrogen in the gas chromatograph 1 is avoided to mix with air to form explosive gas.
[0020] The logic controller 9 controls the alarm 10 to work at the same time, the alarm 10 issues a warning sound, attention of the staff is caused.
[0021] If a fire occurs, a fire source signal will be monitored by the fire source sensor 13, the fire source sensor 13 uploads the monitored fire source signal to the logic controller 9, the logic controller 9 controls the starting valve 15 of the dry powder fire extinguisher 14 to open, a large amount of dry powder is sprayed out through the nozzle 17 on the spray rod 16 to extinguish the fire, the structure can extinguish the fire quickly and effectively, and the degree of automation is high, the harm caused by the fire is reduced as far as possible.
[0022] The specific implementation of the utility model is described in detail above, but is only as an example, the utility model is not limited to the specific implementation cases described above, equivalent modifications to the utility model are also within the protection scope of the utility model.
Claims
1. A safety interlock for a gas chromatograph, comprising: Including gas chromatograph (1), hydrogen inlet (2) is equipped on the gas chromatograph (1), hydrogen inlet (2) is connected hydrogen inlet pipe (3) at, hydrogen inlet pipe (3) is equipped with hydrogen cut-off valve (4) at hydrogen inlet (2) connection place, nitrogen inlet (5) is equipped on the gas chromatograph (1), nitrogen inlet (5) is connected nitrogen inlet pipe (6) at, nitrogen inlet pipe (6) is equipped with nitrogen cut-off valve (7) at nitrogen inlet (5) connection place, combustible gas sensor (8) is equipped between nitrogen inlet (5) and hydrogen inlet (2) on the gas chromatograph (1), combustible gas sensor (8) is electrically connected logic controller (9), alarm (10), hydrogen cut-off valve (4), nitrogen cut-off valve (7) are electrically connected logic controller (9), alarm (10) is fixedly installed on the gas chromatograph (1); The gas chromatograph (1) is also installed with fire source sensor (13), the fire source sensor (13) is electrically connected logic controller (9), the starting valve (15) of dry powder fire extinguisher (14) is electrically connected logic controller (9), the bottle valve (11) is equipped on the dry powder fire extinguisher (14), the spray rod (16) is equipped on the dry powder fire extinguisher (14), the spray nozzle (17) is equipped on the spray rod (16), and the spray nozzle (17) is towards the direction of the gas chromatograph (1).
2. The safety interlock for a gas chromatograph of claim 1, wherein, The gas chromatograph (1) is equipped with a chromatographic column (18).
3. The safety interlock for a gas chromatograph of claim 1 wherein, The fire source sensor (13) is installed near the hydrogen inlet (2).