CN210243301U - Gas sampling device and heat release test equipment - Google Patents
Gas sampling device and heat release test equipment Download PDFInfo
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- CN210243301U CN210243301U CN201920463442.8U CN201920463442U CN210243301U CN 210243301 U CN210243301 U CN 210243301U CN 201920463442 U CN201920463442 U CN 201920463442U CN 210243301 U CN210243301 U CN 210243301U
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Abstract
The utility model belongs to the technical field of the check out test set of fire prevention product, the utility model discloses a gaseous sampling device and heat release test equipment, include: the device comprises a sampling probe, a main air inlet pipe, a heat tracing pipe, a filtering module, an auxiliary air inlet pipe, a first one-way valve, a flowmeter, a cold trap, an air pump, a dryer and a back flushing module; the first end of the main air inlet pipe is detachably communicated with the sampling probe; the second end of the main air inlet pipe is communicated with the first end of the auxiliary air inlet pipe; the heat tracing pipe is wound on the periphery of the main air inlet pipe; the filtering module is arranged on the main air inlet pipe and close to the second end of the main air inlet pipe; a first one-way valve is arranged on the pipeline of the auxiliary air inlet pipe; a flowmeter is arranged on the rear side of the first one-way valve along the gas flowing direction of the auxiliary gas inlet pipe; a cold trap is arranged at the rear side of the flowmeter, an air pump is arranged at the rear side of the cold trap, a dryer is arranged at the rear side of the air pump, and gas enters an external detection container through the dryer; the second end of the main air inlet pipe is also communicated with the air passage of the back flushing module. This kind of gas sampling device can clear away the particulate matter of filter module and main intake pipe inner wall.
Description
Technical Field
The utility model belongs to the technical field of the check out test set of fire prevention product, especially, relate to a gas sampling device and heat release test equipment.
Background
In the field of fire performance detection, heat release is a principle of oxygen consumption to characterize fire performance. The basic procedure is to extract the flue gas generated in the combustion process of the sample, the flue gas enters an oxygen analyzer after being filtered, cooled and dried, the oxygen analyzer calculates the concentration data of oxygen, carbon dioxide, carbon monoxide and three gases in the gas, and the heat release data is finally obtained through a series of calculations.
The oxygen analyzer has high requirements on gas, not only drying and cleaning, but also temperature and flow, and is basically below 5 ℃. Any problem in any of these cases can lead to inaccurate final test results or damage analyzers. The prior art at present mainly comprises simple filtration, water cooling and silica gel drying through a filtration module. The flue gas of extraction contains a large amount of particulate matters, and these particulate matters can the adhesion at pipeline inner wall and filter material surface because the difference in temperature inside and outside the intake pipe, and the pipeline resistance increases, and the diameter diminishes, especially at pipeline kneck, builds up a large amount of particulate matters, can't guarantee the cleanness of the gas that gets into the analysis appearance.
SUMMERY OF THE UTILITY MODEL
The technical purpose of the utility model is to provide a gaseous sampling device and heat release test equipment, this kind of gaseous sampling device can clear away the particulate matter of filter module and main inlet pipe inner wall in order to guarantee to get into the gaseous cleanness of analysis appearance.
In order to solve the above problem, the technical scheme of the utility model is that:
a gas sampling device, comprising: the device comprises a sampling probe, a main air inlet pipe, a heat tracing pipe, a filtering module, an auxiliary air inlet pipe, a first one-way valve, a flowmeter, a cold trap, an air pump, a dryer and a back flushing module;
the first end of the main air inlet pipe is detachably communicated with the sampling probe;
the second end of the main air inlet pipe is communicated with the first end of the auxiliary air inlet pipe;
the heat tracing pipe is wound around the periphery of the main air inlet pipe and is used for preserving heat of the main air inlet pipe;
the filtering module is arranged on the main air inlet pipe and close to the second end of the main air inlet pipe, and is used for filtering particulate matters in the air in the main air inlet pipe;
the pipeline of the auxiliary air inlet pipe is provided with the first one-way valve;
the flow meter is arranged on the rear side of the first one-way valve along the gas flowing direction of the auxiliary gas inlet pipe and used for detecting the gas flow in the auxiliary gas inlet pipe;
along the gas flowing direction of the auxiliary gas inlet pipe, the cold trap is arranged on the rear side of the flow meter, the air pump is arranged on the rear side of the cold trap, the dryer is arranged on the rear side of the air pump, and gas enters an external detection container through the dryer;
the second end of the main air inlet pipe is also communicated with the air path of the back blowing module, and the back blowing module is used for blowing cleaning gas into the main air inlet pipe so as to remove the filtering module and particles on the inner wall of the main air inlet pipe.
According to the utility model discloses an embodiment, the blowback module includes: the back flushing pipe, the second one-way valve, the air storage tank and the air compressor;
the air compressor is used for providing compressed air for the air storage tank;
the air inlet end of the back flushing pipe is communicated with the air outlet of the air storage tank, and the air outlet end of the back flushing pipe is communicated with the second end of the main air inlet pipe;
the second one-way valve is arranged on the air path of the back flushing pipe, and compressed air in the air storage tank can enter the main air inlet pipe when the second one-way valve is in an open state.
According to an embodiment of the present invention, the back-blowing module further includes a pressure control module and a heating module;
the pressure control module is arranged on the gas path of the back flushing pipe and is used for controlling the flow rate of gas in the gas path of the back flushing pipe;
the heating module is arranged on the outer side of the pipe wall of the blowback pipe close to the gas storage tank and used for heating the gas output by the gas storage tank.
According to an embodiment of the present invention, the heating module includes a metal housing, a wave-shaped stainless steel heating pipe, a heat insulating layer, and a temperature control regulator;
the metal shell is arranged on the gas path of the back flushing pipe, the wavy stainless steel heating pipe is arranged in the shell of the metal shell, and the wavy stainless steel heating pipe is used for heating gas passing through the shell of the metal shell;
the heat insulation layer is arranged on the outer peripheral side of the metal shell;
the temperature control regulator comprises a thermocouple, the thermocouple is arranged in the shell of the metal shell and close to the gas outlet end, and the temperature control regulator sends the detected temperature to the external control end;
and the heating control circuit of the wavy stainless steel heating pipe is electrically connected with the external control end and is used for receiving a heating signal sent by the external control end.
According to an embodiment of the utility model, be equipped with drum filter core, silica gel drier and moisture indicator in the desicator.
Based on the same conception, the utility model also provides a heat release test equipment, this heat release test equipment includes foretell gas sampling device.
The utility model discloses owing to adopt above technical scheme, make it compare with prior art and have following advantage and positive effect:
1) the utility model discloses a gaseous sampling device in an embodiment is through providing a blowback module, and blowback module and the second end intercommunication of main intake pipe, blowback module can blow in the main intake pipe in the past and clean gas, can clear away the particulate matter of filter module and main intake pipe inner wall like this, has saved the work load of artifical clearance pipeline, and this kind of gaseous sampling device can clear away the particulate matter of filter module and main intake pipe inner wall in order to guarantee the gaseous clean of entering analysis appearance.
2) The utility model discloses a gas sampling device in the embodiment is through setting up the gas flow that the flowmeter can real-time supervision get into the analysis appearance on the gas flow direction of assisting the intake pipe and whether satisfy test analysis needs.
3) The utility model discloses a gaseous sampling device in the embodiment can guarantee the gaseous degree of drying that gets into the analysis appearance through set up cold trap and desicator in the gas flow direction of assisting the intake pipe.
Drawings
Fig. 1 is a structural diagram of a gas sampling device according to the present invention.
Description of reference numerals:
1: a sampling probe; 2: a main air inlet pipe; 3: a heat tracing pipe; 4: a filtration module; 5: an auxiliary air inlet pipe; 6: a first check valve; 7: a flow meter; 8: cold trap; 9: an air pump; 10: a dryer; 11: a back flushing module;
1101: a blowback pipe; 1102: a second one-way valve; 1103: a gas storage tank; 1104: an air compressor; 1105: a pressure control module; 1106: the module is heated.
Detailed Description
The gas sampling device and the heat release testing apparatus according to the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more fully apparent from the following description and appended claims.
Example 1
Referring to fig. 1, a gas sampling device includes: the device comprises a sampling probe 1, a main air inlet pipe 2, a heat tracing pipe 3, a filtering module 4, an auxiliary air inlet pipe 5, a first one-way valve 6, a flowmeter 7, a cold trap 8, an air pump 9, a dryer 10 and a back flushing module 11; the first end of the main air inlet pipe 2 is detachably communicated with the sampling probe 1; the second end of the main air inlet pipe 2 is communicated with the first end of the auxiliary air inlet pipe 5; the heat tracing pipe 3 is wound around the periphery of the main air inlet pipe 2 and is used for preserving heat of the main air inlet pipe 2; the filtering module 4 is arranged at a second end position, close to the main air inlet pipe 2, on the main air inlet pipe 2 and used for filtering particulate matters in the air in the main air inlet pipe 2; a first one-way valve 6 is arranged on the pipeline of the auxiliary air inlet pipe 5; along the gas flow direction of the auxiliary gas inlet pipe 5, a flow meter 7 is arranged on the rear side of the first one-way valve 6, and the flow meter 7 is used for detecting the gas flow in the auxiliary gas inlet pipe 5; along the gas flowing direction of the auxiliary gas inlet pipe 5, a cold trap 8 is arranged on the rear side of the flowmeter 7, a suction pump 9 is arranged on the rear side of the cold trap 8, a dryer 10 is arranged on the rear side of the suction pump 9, and gas enters an external detection container (analyzer) through the dryer 10; the second end of main intake pipe 2 still communicates with the gas circuit of blowback module 11, and blowback module 11 is used for blowing in toward main intake pipe 2 and cleans gas to clear away the particulate matter of filter module 4 and 2 inner walls of main intake pipe.
The gaseous sampling device in this embodiment is through providing a blowback module 11, blowback module 11 and main intake pipe 2's second end intercommunication, blowback module 11 can blow in main intake pipe 2 in the past and clean gas, can clear away the particulate matter of filter module 4 and 2 inner walls of main intake pipe like this, the work load of artifical clearance pipeline has been saved, the particulate matter of filter module 4 and 2 inner walls of main intake pipe can be clear away to this kind of gaseous sampling device is in order to guarantee the gaseous cleanness that gets into the analysis appearance. The back flushing module 11 not only cleans particles in the pipeline, but also can clean ash of the filter module 4, so that the two effects are achieved, and the cost of the filter module 4 is saved.
The gas sampling device in this embodiment can monitor in real time whether the gas flow entering the analyzer meets the requirements of test analysis by arranging the flowmeter 7 in the gas flow direction of the auxiliary gas inlet pipe 5. The flowmeter 7 can be electrically connected with an external control end, and when the gas flow rate does not reach a set value, a program in test software integrated to the control end can give an alarm to prompt that the gas flow rate is insufficient.
The gas sampling device in this embodiment can ensure the dryness of the gas entering the analyzer by providing the cold trap 8 and the dryer 10 in the gas flow direction of the auxiliary gas inlet pipe 5. Current simple water-cooling is abandoned to this embodiment, adopts neotype cold-trap 8, possesses the digital display, has the dehydration function simultaneously, and the external drainage function is all the way in the 8 gas outlets of cold-trap. The water generated after cooling is directly discharged into the water container.
Furthermore, the filter module 4 comprises a filter element made of a sintered plate material, a customized shell and a mounting system, and can be repeatedly used, so that the replacement is reduced, and the cost is saved. Meanwhile, the filtering precision is far higher than that of the conventional filtering material. This filter module 4 abandons conventional ceramic filtration and crosses filter pulp etc. adopts neotype high temperature resistant sintered plate filter core, and the filter core top layer has the PTFE micropore to film, has good deashing and filter effect.
Further, the blowback module 11 includes: a blowback pipe 1101, a second check valve 1102, an air storage tank 1103 and an air compressor 1104; an air compressor 1104 for providing compressed air to the air tank 1103; the air inlet end of the blowback pipe 1101 is communicated with the air outlet of the air storage tank 1103, and the air outlet end of the blowback pipe 1101 is communicated with the second end of the main air inlet pipe 2; the second check valve 1102 is disposed in an air path of the blowback pipe 1101, and compressed air in the air tank 1103 can enter the main intake pipe 2 in a state where the second check valve 1102 is opened.
Further, the blowback module 11 further includes a pressure control module 1105 and a heating module 1106; the pressure control module 1105 is arranged on the gas path of the blowback pipe 1101 and is used for controlling the flow rate of gas in the gas path of the blowback pipe 1101; the heating module 1106 is arranged on the outer side of the pipe wall of the blowback pipe 1101 close to the gas storage tank 1103 and used for heating the gas output by the gas storage tank 1103.
Specifically, the pressure control module 1105 may be an electric switch, and the pressure of the blowback gas may be set by controlling the opening of the electric switch.
Specifically, the heating module 1106 comprises a metal shell, a wavy stainless steel heating pipe, a heat-insulating layer and a temperature control regulator; the metal shell is arranged on the gas path of the blowback pipe 1101, the wavy stainless steel heating pipe is arranged in the shell of the metal shell, and the wavy stainless steel heating pipe is used for heating gas passing through the shell of the metal shell; the heat insulation layer is arranged on the outer periphery of the metal shell; the temperature control regulator comprises a thermocouple, the thermocouple is arranged in the shell of the metal shell and close to the gas outlet end, and the temperature control regulator sends the detected temperature to the external control end; and a heating control circuit of the wavy stainless steel heating pipe is electrically connected with the external control end and used for receiving a heating signal sent by the external control end. The wavy stainless steel heating pipe can increase the contact area with gas, the thermocouple is arranged in the temperature control regulator, the heated temperature can be transmitted to the test software of the control end in real time, the heating time is calculated, the temperature of the wavy stainless steel heating pipe is controlled, the purging frequency can be set according to the temperature, and the requirement for the temperature of the purged gas is met. The heating device has low cost and simple structure.
Further, a cylindrical filter element, a silica gel drying agent and a moisture indicator are arranged in the dryer 10.
The operation of the gas sampling device in one embodiment is described below as an example.
Firstly, the aspiration pump 9 starts work, sampling probe 1 samples the gas that the experiment produced, get into main intake pipe 2, heat tracing pipe 3 does not start this moment, play heat retaining effect, it filters to filter module 4, filter module 4 gives vent to anger the end and has two directions, firstly to blowback pipe 1101 direction, another one is supplementary intake pipe 5, second check valve 1102 on blowback pipe 1101 way is in the closed condition this moment, and first check valve 6 on supplementary intake pipe 5 is in opening, when gas flow-through flowmeter 7, test software shows real-time gas flow data, the font black shows that the flow is higher than the minimum value that sets up this moment, otherwise, show that the flow is lower than the minimum value that sets up this moment. The test software exits the current operation and the air pump 9 stops operating.
The cleaning function is triggered in the test software, at the moment, the air compressor 1104 starts to operate, the pressure, the temperature, the frequency and the frequency of the back flushing gas are set, and the setting is automatically adjusted according to the environment and the viscosity degree of particles in the pipeline. The temperature should not exceed 300 ℃ to ensure the safety of the pipeline, and the frequency should not exceed 3 times per minute to ensure the pressure of purging. The second check valve 1102 is opened and the first check valve 6 is closed. Gas passes through heating module 1106, and pressure control module 1105 flows through, gets into filter module 4, crosses the sintering plate filter core and cleans, gets into main intake pipe 2 and sweeps the particulate matter on the pipe wall, and the gas temperature in the heat tracing pipe 3 perception pipeline, when the temperature was less than the setting, heat tracing pipe 3 began to heat, guarantees that the gas temperature in the pipeline is invariable.
Example 2
Based on the same conception, the utility model also provides a heat release test equipment, this heat release test equipment includes embodiment 1's gaseous sampling device.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, the changes are still within the scope of the present invention if they fall within the scope of the claims and their equivalents.
Claims (6)
1. A gas sampling device, comprising: the device comprises a sampling probe, a main air inlet pipe, a heat tracing pipe, a filtering module, an auxiliary air inlet pipe, a first one-way valve, a flowmeter, a cold trap, an air pump, a dryer and a back flushing module;
the first end of the main air inlet pipe is detachably communicated with the sampling probe;
the second end of the main air inlet pipe is communicated with the first end of the auxiliary air inlet pipe;
the heat tracing pipe is wound around the periphery of the main air inlet pipe and is used for preserving heat of the main air inlet pipe;
the filtering module is arranged on the main air inlet pipe and close to the second end of the main air inlet pipe, and is used for filtering particulate matters in the air in the main air inlet pipe;
the pipeline of the auxiliary air inlet pipe is provided with the first one-way valve;
the flow meter is arranged on the rear side of the first one-way valve along the gas flowing direction of the auxiliary gas inlet pipe and used for detecting the gas flow in the auxiliary gas inlet pipe;
along the gas flowing direction of the auxiliary gas inlet pipe, the cold trap is arranged on the rear side of the flow meter, the air pump is arranged on the rear side of the cold trap, the dryer is arranged on the rear side of the air pump, and gas enters an external detection container through the dryer;
the second end of the main air inlet pipe is also communicated with the air path of the back blowing module, and the back blowing module is used for blowing cleaning gas into the main air inlet pipe so as to remove the filtering module and particles on the inner wall of the main air inlet pipe.
2. The gas sampling device of claim 1, wherein the blowback module comprises: the back flushing pipe, the second one-way valve, the air storage tank and the air compressor;
the air compressor is used for providing compressed air for the air storage tank;
the air inlet end of the back flushing pipe is communicated with the air outlet of the air storage tank, and the air outlet end of the back flushing pipe is communicated with the second end of the main air inlet pipe;
the second one-way valve is arranged on the air path of the back flushing pipe, and compressed air in the air storage tank can enter the main air inlet pipe when the second one-way valve is in an open state.
3. The gas sampling device of claim 2, wherein the back flushing module further comprises a pressure control module and a heating module;
the pressure control module is arranged on the gas path of the back flushing pipe and is used for controlling the flow rate of gas in the gas path of the back flushing pipe;
the heating module is arranged on the outer side of the pipe wall of the blowback pipe close to the gas storage tank and used for heating the gas output by the gas storage tank.
4. The gas sampling device of claim 3, wherein the heating module comprises a metal housing, a corrugated stainless steel heating tube, an insulation layer, a temperature control regulator;
the metal shell is arranged on the gas path of the back flushing pipe, the wavy stainless steel heating pipe is arranged in the shell of the metal shell, and the wavy stainless steel heating pipe is used for heating gas passing through the shell of the metal shell;
the heat insulation layer is arranged on the outer peripheral side of the metal shell;
the temperature control regulator comprises a thermocouple, the thermocouple is arranged in the shell of the metal shell and close to the gas outlet end, and the temperature control regulator sends the detected temperature to the external control end;
and the heating control circuit of the wavy stainless steel heating pipe is electrically connected with the external control end and is used for receiving a heating signal sent by the external control end.
5. The gas sampling device of claim 1, wherein the desiccator comprises a cylindrical filter element, a silica gel desiccant, and a moisture indicator.
6. A heat release testing apparatus, characterized by comprising a gas sampling device according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920463442.8U CN210243301U (en) | 2019-04-08 | 2019-04-08 | Gas sampling device and heat release test equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920463442.8U CN210243301U (en) | 2019-04-08 | 2019-04-08 | Gas sampling device and heat release test equipment |
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| Publication Number | Publication Date |
|---|---|
| CN210243301U true CN210243301U (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920463442.8U Active CN210243301U (en) | 2019-04-08 | 2019-04-08 | Gas sampling device and heat release test equipment |
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| CN (1) | CN210243301U (en) |
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2019
- 2019-04-08 CN CN201920463442.8U patent/CN210243301U/en active Active
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