JPH087118B2 - Gas detector equipped with drain removal device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a gas detection device including a drain removal device that removes water in a test gas containing a large amount of water vapor.

[Conventional technology]

FIG. 2 is a configuration diagram showing an example of a gas detection device provided with a conventional drain removal device, 1 is the whole gas detection device, 2 is the drain removal device of the gas detection device 1, 3 is a drain trap, 3a is a drain cup, 3b is a bottom portion of the drain cup 3a, 3c is a drain port for discharging drain, 4 is a water seal cup provided below the drain trap 3, and 5 is the water seal. The stored water stored in the cup 4, 6 is the drain port 3c of the drain cup 3a and the water sealing cup 4
It is a drain pipe connected between the
It is immersed inside. 7 is a drain discharge pipe for discharging the stored water 5 when the surface of the stored water 5 is at a certain level or higher due to drain, 8 is a gas detector for detecting the test gas, and 9 is a pump for sucking the test gas. Is.

As described above, in order to remove the water contained in the test gas, the drain trap 3 must be provided on the negative pressure side of the pump 9. Therefore, when the suction line for the test gas is clogged and blocked. Taking the above into consideration, the lower end of the drain pipe 6 is immersed in the stored water 5, and when the water surface of the stored water 5 exceeds a certain level, the drain is discharged from the drain discharge pipe 7.

[Problems to be Solved by the Invention]

By the way, the suction pressure of the pump 9 used in the gas detector 1 is generally about 1.0 to 2.0 m of water column. Therefore, the drain trap 3 also needs to have a height h of 1 to 2 m from the surface of the stored water 5 in the water sealing cup 4. Therefore, the shape of the drain removing device 2 becomes large, and when the drain removing device 2 is attached to the gas detector 8, the shape of the entire gas detecting device 1 also becomes large and there is a problem that it becomes expensive. Therefore, the drain trap 3
If the height h of the gas is reduced, the stored water 5 in the water seal cup 4 will be sucked up when clogging occurs on the suction side of the test gas, so that the gas detector 8 and the pump 9 will malfunction. There was a point.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain a gas detection device including a drain removing device that discharges drain using an air ejector.

[Means for solving the problem]

The gas detection device provided with the drain removing device of the present invention,
When detecting a test gas with a gas detector, in a gas detection device comprising a drain trap for removing water contained in the test gas, and a drain removing device consisting of a pump for sucking the test gas, The drain removing device includes a check valve for preventing a backflow of the water, and an air ejector for sucking and discharging the water in the drain trap by supplying the discharge fluid of the pump as pressurized air. It is characterized by.

[Action]

In the present invention, the water in the drain trap is discharged by the first air ejector which uses the exhaust of the pump for sucking the test gas as the pressurized air.

〔Example〕

FIG. 1 is a block diagram showing an embodiment of the first invention of the present invention. The same reference numerals as those in FIG. 3 denote the same parts, 11 denotes the entire gas detection device, 12 denotes a drain removing device, 13 Is an air ejector, 13a is an exhaust port, 14 is an exhaust pipe for exhausting the test gas sucked by the pump 9, and 15 is a check valve provided in the drain conduit 6.

 Next, the operation will be described.

To remove the water contained in the test gas, use the exhaust pipe 14
The drain generated in the drain trap 3 is discharged as the driving flow of the air ejector 13 using the pressurized air discharged from the.

Further, the check valve 15 is provided to prevent the drain from flowing to the gas detector 8 or the pump 9 when the gas suction side is clogged.

〔The invention's effect〕

As described above, the present invention, when detecting a test gas with a gas detector, removes the drain including a drain trap that removes water contained in the test gas and a pump that sucks the test gas. In a gas detection device equipped with a device, the drain removing device sucks the water in the drain trap by supplying a check valve for preventing a backflow of the water and a fluid discharged from the pump as pressurized air. The air ejector is driven by using the exhaust gas of the pump as the pressurized air, so that the configuration is extremely simple.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram showing an example of a gas detector equipped with a conventional drain removing device. In the figure, 3 is a drain trap, 8 is a gas detector, 9 is a pump, 11 is a gas detection device, 12 is a drain removal device, and 13 is a first
The air ejector 13a is a discharge port.

Claims (1)

[Claims] 1. A gas provided with a drain removing device comprising a drain trap for removing moisture contained in the test gas when the test gas is detected by a gas detector, and a pump for sucking the test gas. In the detection device, the drain removing device sucks and discharges the water in the drain trap by supplying the check valve for preventing the backflow of the water and the discharge fluid of the pump as pressurized air. A gas detection device equipped with a drain removal device.