CN210774922U

CN210774922U - Dew point meter with sampling system

Info

Publication number: CN210774922U
Application number: CN201921584807.9U
Authority: CN
Inventors: 席鹏; 陈雪菲
Original assignee: Wuhan Aozhibo Technology Co ltd
Current assignee: Wuhan Aozhibo Technology Co ltd
Priority date: 2019-09-23
Filing date: 2019-09-23
Publication date: 2020-06-16
Anticipated expiration: 2029-09-23

Abstract

The utility model discloses a dew point hygrometer with a sampling system, which comprises an air inlet pipe joint, a needle valve, a filter, a flowmeter with a pressure gauge, a spiral condenser pipe, a pressure reducing valve, a glass rotameter, a check valve and an air outlet pipe joint which are sequentially connected in series through a gas pipeline; a branch pipeline is arranged between the spiral condensation pipe and the pressure reducing valve, a sensor sleeve fixed through a ball valve is arranged in the branch pipeline, a filter is arranged below the sensor sleeve, and a dew point sensor is arranged inside the sensor sleeve and connected with a display screen. The utility model discloses a beneficial effect lie in: (1) a spiral condenser pipe is additionally arranged to reduce the gas temperature and avoid the sensor from being damaged by high temperature; (2) the sensor sleeve is connected with the ball valve through threads, so that the sensor can be quickly connected or detached at any time under the condition of not influencing the normal operation of the process flow; (3) a plurality of filters are arranged, so that the sensor is prevented from being polluted by impurities in the gas to be detected; (4) the sensor is connected with the display screen, and the dew point temperature can be observed quickly and visually.

Description

Dew point meter with sampling system

Technical Field

The utility model relates to a dew point measurement field, concretely relates to dew point hygrometer with sampling system.

Background

Air or other gases generally contain a certain amount of water vapor that creates pressure as it enters the gas; the greater the number of water vapor molecules entering the gas, the greater its pressure (i.e., partial pressure of water vapor). At the same time, the amount of water vapor that changes back to liquid water increases as the pressure of the water vapor increases. When the amount of the water vapor entering the gas is equal to that of the water changing back to the liquid state, the water vapor reaches a saturated state in the gas and begins to form dew; the temperature at this time is called the dew point of the gas, and the higher the partial pressure of water vapor in the gas is, the higher the dew point thereof is; the lower the reverse is. The dew point, also called dew point temperature, is the temperature at which water vapor in a certain gas is saturated by cooling and condensed into water under normal atmospheric pressure.

Too high a moisture content in industrial gases can create a series of problems, namely, the quality of the moisture can increase the transportation and compression costs of the gas, the moisture condensation can block or damage the vent pipes when the temperature is too low, and the too high moisture content can combine with the gas to form acid to corrode the pipes, etc. It is therefore necessary to measure the water content of industrial gases using a dew point meter to monitor the water content of the gases in real time.

Chinese patent CN209215271U discloses an online analytical equipment of water dew point appearance, including the casing that has the heat preservation, sample gas pretreatment systems and water dew point analytic system, through setting up sample gas pretreatment systems and water dew point analytic system, the natural gas that sample gas pretreatment systems will need to detect filters, the decompression is handled, guarantee to get into this device's natural gas and meet the requirements, water dew point analytic system analysis goes out the water dew point that waits to detect the natural gas, the mode of both combinations can be quick handles the sampling gas, in time accurately analyze out the water dew point of sample gas simultaneously. However, if the temperature of the gas to be detected is too high, the dew point sensor may be damaged; when the dew point sensor needs to be disassembled or connected, the whole process flow needs to be closed, and the process is complicated.

Disclosure of Invention

To prior art's defect, the utility model provides a dew point hygrometer with sampling system, this system can cool off industrial gas in advance to insert or dismantle dew point sensor at any time under the condition of guaranteeing the normal function of process flow.

In order to achieve the above purpose, the technical solution of the present invention is as follows:

a dew point instrument with a sampling system comprises an air inlet pipe joint, a needle valve, a first filter, a flowmeter with a pressure gauge, a spiral condenser pipe, a pressure reducing valve, a glass rotameter, a check valve and an air outlet pipe joint which are sequentially connected in series through a gas pipeline; the spiral condenser pipe with be equipped with the lateral conduit between the relief pressure valve, be equipped with the sensor sleeve fixed through the ball valve in the lateral conduit, the movable cover is equipped with dew point sensor in the sensor sleeve, dew point sensor probe stretches into in the gas piping.

The needle valve is matched with the flowmeter with the pressure gauge for use and is used for controlling the flow rate of the gas to be measured and avoiding the influence of overlarge pressure on the measurement result caused by overlarge flow rate; the first filter is used for filtering impurities, oil stains and the like in the gas to be measured, so that the dew point sensor is prevented from being polluted and the service life of the dew point sensor is prevented from being influenced; the spiral condenser pipe is used for cooling gas with overhigh temperature, so that the damage of the high-temperature gas to the sensor is avoided; the dew point sensor is arranged in the sensor sleeve, the sensor sleeve is connected with the branch pipeline through the ball valve on the branch pipeline, and the flow direction of gas can be controlled by opening or closing the ball valve, so that the dew point sensor can be connected or detached at any time under the condition of not influencing the normal operation of the process flow; the pressure reducing valve is matched with the glass rotameter for use and is used for controlling the pressure of the exhaust gas so that the exhaust gas can be stably exhausted; the check valve is used for preventing the discharged gas from flowing back to the sampling system, so that the accuracy of the measuring result is influenced.

Preferably, a second filter is disposed below the sensor sleeve. The filter is arranged below the sensor sleeve, so that the gas to be detected can be further filtered, and the pollution of impurities in the gas to the sensor is avoided.

Preferably, the sensor sleeve is screwed in a threaded manner onto a ball valve fixed to the gas pipe. The sensor sleeve is quickly mounted and dismounted in a threaded connection mode.

Preferably, the dew point sensor is connected to a display. The display can intuitively reflect the measured dew point value in real time,

preferably, the probe of the dew point sensor is a probe capable of tolerating high humidity, and when the moisture content in the gas to be measured is too high, the probe of the sensor may be damaged, so that the probe capable of tolerating high humidity is adopted.

Preferably, the probe of the dew point sensor is a probe with a heating function. When the temperature of the gas to be measured is close to the condensation temperature, the heating function of the probe prevents the water vapor condensation on the surface of the sensor and avoids the damage of the sensor.

Preferably, the spiral condenser pipe is a PTEF pipe or a stainless steel pipe.

The utility model discloses a beneficial effect lie in:

(1) the spiral condenser pipe is additionally arranged in the sampling system, so that the gas to be detected with overhigh temperature can be properly reduced, and the damage of the high-temperature gas to the dew point sensor is avoided.

(2) The dew point sensor and the sleeve thereof are connected with the ball valve on the branch pipeline, the dew point sensor can be connected or detached at any time under the condition of not influencing the normal operation of the process flow so as to maintain the sensor, and meanwhile, the sensor sleeve is connected with the ball valve in a threaded manner, so that the quick installation and detachment are facilitated.

(3) All set up the filter in entrance and sensor sleeve below, avoided impurity, greasy dirt etc. in the gas that awaits measuring to the pollution of dew point sensor, increased the life of sensor.

(4) The dew point sensor is connected with the display screen, and the detected dew point temperature can be quickly and visually seen.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;

fig. 2 is a schematic structural diagram of embodiment 2 of the present invention;

in the figure: 1. an air inlet pipe joint; 2. a needle valve; 3. a first filter; 4. a flow meter with a pressure gauge; 5. a spiral condenser tube; 6. a branch pipe; 7. a ball valve; 8. a sensor sleeve; 9. a dew point sensor probe; 10. a display screen; 11. a pressure reducing valve; 12. a glass rotameter; 13. a check valve; 14. an air outlet pipe joint; 15. a second filter.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example 1

The embodiment provides a dew point meter with a sampling system, as shown in fig. 1, a gas to be measured with a high temperature enters from an air inlet pipe joint 1, the air inlet pressure and the air inlet flow are monitored in real time through a flow meter 4 with a pressure gauge, the air inlet amount is adjusted in real time through a needle valve 2, and the influence of overlarge pressure on a measurement result is avoided. The first filter 3 can preliminarily filter impurities and oil stains mixed in the gas to be detected, and pollution to the dew point sensor probe 9 is avoided. Then the higher gas that awaits measuring of temperature passes through the spiral condenser pipe 5 that the stainless steel made, because this spiral condenser pipe 5 is stainless steel pipe, and the gaseous flow distance of heliciform multiplicable to reach the effect of cooling, avoided the damage to dew point sensor probe 9. In the working state, the ball valve 7 on the branch pipeline 6 is in an open state, the sensor sleeve 8 provided with the dew point sensor probe 9 is fixed, the dew point sensor probe 9 extends into the gas pipeline, the gas to be detected flows through the dew point sensor probe 9, the dew point temperature of the gas is measured and displayed on the display screen 10. The gas continues to flow along the pipeline, the pressure of the gas discharge is controlled by a pressure reducing valve 11 so that the gas is stably discharged, and the flow rate of the gas flowing out is monitored by a glass rotameter 12. And a check valve 13 is arranged above the air outlet pipe joint 14, so that exhausted gas can be prevented from flowing back to the sampling system again, and the accuracy of a measuring result is influenced.

When the dew point sensor needs to be disassembled for maintenance, the whole process flow does not need to be closed, and the gas leakage can be avoided only by closing the switch of the ball valve 7 while unscrewing the sensor sleeve 8 connected with the ball valve 7, so that the whole process flow can be continuously carried out.

Example 2

The present embodiment is different from embodiment 1 in that: as shown in fig. 2, a second filter 15 is further disposed below the sensor sleeve 8, so as to further filter the gas to be measured, and avoid the influence of impurities and oil stains in the gas on the dew point sensor probe 9. And meanwhile, the dew point sensor probe 9 is a probe capable of tolerating higher humidity, so that the corrosion of the dew point sensor probe 9 caused by higher moisture content in the gas to be detected is avoided. The service life of the sensor can be prolonged.

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 these 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. A dew point instrument with a sampling system is characterized by comprising an air inlet pipe joint, a needle valve, a first filter, a flowmeter with a pressure gauge, a spiral condenser pipe, a pressure reducing valve, a glass rotameter, a check valve and an air outlet pipe joint which are sequentially connected in series through a gas pipeline;

the spiral condenser pipe with be equipped with the lateral conduit between the relief pressure valve, be equipped with the sensor sleeve fixed through the ball valve in the lateral conduit, the movable cover is equipped with dew point sensor in the sensor sleeve, dew point sensor's probe stretches into in the gas piping.

2. The dew point instrument with a sampling system of claim 1, wherein a second filter is disposed below the sensor sleeve.

3. The dew point instrument with a sampling system of claim 1, wherein the sensor sleeve is threadably secured to the ball valve.

4. The dew point meter with sampling system of claim 1, wherein the dew point sensor is coupled to a display.

5. The dew point meter with a sampling system of claim 1, wherein the probe of the dew point sensor is a probe that can withstand higher humidity.

6. The dew point meter with a sampling system of claim 1, wherein the probe of the dew point sensor is a probe with heating function.

7. The dew point instrument with a sampling system of claim 1, wherein the spiral condenser tube is a PTEF tube or a stainless steel tube.