CN210166366U - Dust cover with calibration function - Google Patents
Dust cover with calibration function Download PDFInfo
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- CN210166366U CN210166366U CN201920623892.9U CN201920623892U CN210166366U CN 210166366 U CN210166366 U CN 210166366U CN 201920623892 U CN201920623892 U CN 201920623892U CN 210166366 U CN210166366 U CN 210166366U
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- dust cover
- gas
- gas detector
- shell
- sensor
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Abstract
The utility model provides a dust cover of function is markd in area belongs to gaseous detection equipment technical field. Including the gas detector casing, be located the inside gas detector who just communicates each other of gas detector casing, signal power line and sensor, gas detector chassis bottom is provided with dustproof unit, dustproof unit includes the dust cover shell, installs dust cover inner shell and filter screen in the dust cover shell, be provided with the air vent on the dust cover shell body, be provided with the air vent on the dust cover inner shell, still be provided with the gas port that connects with dust cover inner shell and filter screen intercommunication in the dust cover shell. The utility model discloses simple structure, convenient operation will gaseous demarcation with dustproof the set on a device, reduces part quantity, reduce cost. The gas detector is detected by the calibration gas with known concentration, so that the accuracy of the gas detector is guaranteed, and the detection of the gas with unknown concentration can be realized.
Description
Technical Field
The utility model belongs to the technical field of gaseous detection equipment, specifically be a dust cover of function is markd in area.
Background
In order to prevent too much dust from accumulating on the air inlet and affecting the detection effect in the actual use of the gas detector, a dust cover device is generally added at the air inlet end of the gas detector. The dust cover still has simultaneously and prevents that the drop of water that splashes from beating to form the water film at the air inlet and influence and admit air.
The gas detector needs to use gas with known concentration to carry out gas test in production, installation, later maintenance and regular inspection, and whether the detection is qualified or not is judged according to the reaction time and the concentration precision, or a display value or an alarm value of the detector is set. If the gas detector is placed in a gas concentration test box for testing, the test result is accurate, but the time of the whole test process is long when the gas detector is placed in the test box for testing, or the installed gas detector is inconvenient to place in the gas test box for testing. The gas detector is characterized in that a calibration cover is arranged at a detection gas inlet of the gas detector, so that the gas concentration sensed by the gas inlet of the gas detector in the calibration cover is close to the gas concentration in a gas test box, and the rear end of the calibration cover is connected with a calibration gas source through a gas conveying pipe.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a dust cover of function is markd in area, adopts the utility model discloses a dust cover structure can reduce part quantity, reduce cost on gas is markd and dustproof set on a device.
The utility model discloses the purpose is realized through following technical scheme:
the utility model provides a dust cover of function is markd in area, includes the gas detector casing, is located the inside gas detector who just communicates each other of gas detector casing, signal power line and sensor, gas detector chassis bottom is provided with dustproof unit, dustproof unit includes the dust cover shell, installs dust cover inner shell and filter screen in the dust cover shell, be provided with the air vent on the dust cover outer shell casing, be provided with the air vent on the dust cover inner shell, still be provided with the gas receiving mouth with dust cover inner shell and filter screen intercommunication in the dust cover shell.
As a specific embodiment of function's dust cover is markd in area, the neck end that the gas detector casing is connected including the casing that is the ball shape and with the dust cover, the sensor is located the neck and holds.
As a specific embodiment of the dust cover of function is markd in area, the sensor passes through the sensor bracket to be fixed in the neck end of gas detector casing.
As a specific embodiment of the dust cover of function is markd in area, the gas port is the obconic shape.
As a specific embodiment of the dust cover of function is markd in area, the air vent of the obconical gas receiving port is located the bottom of the obconical.
As a specific embodiment of the dust cover of function is markd in area, dust cover shell inner wall is provided with the water conservancy diversion pole, water conservancy diversion pole and connect and leave the air vent between the gas port outer wall.
As a specific embodiment of the dust cover of function is markd in area, the dust cover inner shell is provided with the separation blade.
As a specific embodiment of the dust cover of function is markd in area, the sensor bottom is provided with the explosion-proof piece.
As a specific embodiment of the dust cover of function is markd in area, the sensor top is provided with the encapsulating glue layer.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model relates to a dust cover of function is markd in area, simple structure, convenient operation will gaseous demarcation with dustproof set on a device, reduce part quantity, reduce cost. The gas detector is detected by the calibration gas with known concentration, so that the accuracy of the gas detector is guaranteed, and the detection of the gas with unknown concentration can be realized.
Drawings
Fig. 1 is a schematic structural view of the dust cover with marked performance of the present invention.
Fig. 2 is a schematic structural diagram of the dustproof unit of the present invention.
Fig. 3 is the schematic view of the airflow direction of the dustproof unit of the present invention.
Reference numerals: the method comprises the following steps of 1-a gas detector shell, 101-a shell, 102-a neck end, 2-a gas detector, 3-a signal power line, 4-a sensor, 5-a dustproof cover inner shell, 6-a dustproof cover outer shell, 7-a filter screen, 8-an air receiving port, 9-a sensor bracket, 10-an explosion-proof sheet, 11-a blocking sheet, 12-an air chamber, 13-a guide rod and 14-an encapsulating adhesive layer.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following is right combining with concrete structure and principle the utility model relates to a dust cover of function is markd in area carries out the detailed description.
A dust cover with calibration function, as shown in fig. 1 and 2. Including gas detector casing 1, be located the inside gas detector 2 that just communicates each other of gas detector casing 1, signal power cord 3 and sensor 4, 1 bottom of gas detector casing is provided with dustproof unit, dustproof unit includes dust cover shell 6, installs dust cover inner shell 5 and filter screen 7 in dust cover shell 6, be provided with the air vent on the 6 casings of dust cover shell, be provided with the air vent on the dust cover inner shell 5, still be provided with in the dust cover shell 6 with dust cover inner shell 5 and filter screen 7 intercommunication connect the gas mouth 8.
In the dust cover with the setting function of the utility model, the gas detector casing 1 is used for isolating and protecting the gas detector 2 and other parts inside, and is generally processed by metal materials; gas detector 2 is used for detecting the gas that sensor 4 sensed, and signal power cord 3 transmits signal and power for gas detector 2, and sensor 4 tests the target gas type as required, selects the gas sensor of corresponding specification model, and sensor 4's pin and signal power cord 3 welded connection, and the signal change when sensor 4 perception gas concentration is transmitted for gas detector 2 through signal power cord 3 as the resistance value and is analyzed and processed and judge gas concentration.
The dust-proof unit is used for removing dust from the introduced gas and comprises a dust-proof cover outer shell 6, a dust-proof cover inner shell 5 arranged in the dust-proof cover outer shell 6 and a filter screen 7. Be provided with a plurality of air vent on the dust cover shell 6 casing, in air gets into dust cover shell 6 from the air vent on the dust cover shell casing, then gets into filter screen 7 through the air vent on the dust cover inner shell 5, gets rid of most dust in the air through filter screen 7. A certain distance is reserved between the inner shell 5 of the dust cover and the sensor 4 to form an air chamber 12, and the calibration gas or the inspection target gas can stay in the air chamber 12 for a short time, so that the sensor 4 can conveniently inspect the gas components and the concentration. In order to realize the input of calibration or detection gas, an air receiving port 8 communicated with the dust cover inner shell 5 and the filter screen 7 is further arranged in the dust cover outer shell 6.
Further, the gas detector casing 1 comprises a spherical shell 101 and a neck end 102 connected with a dust cover, and the sensor 4 is positioned in the neck end 102. Adopt spherical casing 101 to make things convenient for placing of gas detector, fix sensor 4 at neck end 102, can increase the installation fastness, prevent because sensor 4 rocks measuring error that causes, improves the detection accuracy.
Further, the sensor 4 is fixed in the neck end 102 of the gas detector housing 1 by a sensor bracket 9.
Further, the air receiving opening 8 is in an inverted conical shape. Further, the vent hole of the inverted cone shaped air receiving port 8 is located at the bottom of the inverted cone. The air receiving opening 8 is arranged to be in an inverted conical shape, so that the air receiving opening can be suitable for air receiving pipes with different diameters, and the connection with calibration or detection gas is facilitated.
Further, the inner wall of the dust cover shell 6 is provided with a flow guide rod 13, and a vent hole is reserved between the flow guide rod 13 and the outer wall of the air receiving port 8. The utility model discloses gaseous air current direction in dustproof unit is shown in fig. 3, the gaseous air vent diffusion through the 8 bottoms of obconic shape gas port of lower part advances in dust cover shell 6, and along the 8 direction diffusion of obconic shape gas port, the gaseous air vent that passes through on the dust cover shell 6 of horizontal direction gets into in dust cover shell 6, and through the air isolation that air and horizontal direction that water conservancy diversion pole 13 got into the lower part get into, prevent because gaseous entering speed or flow are too fast, cause the influence to sensor 4, improve gas detector's detection accuracy.
Further, the dust cover inner housing 5 is provided with a catch 11. For a heat-generating sensor 4 (such as a catalytic sensor 4 and a semiconductor sensor 4) and a pressure impact sensitive sensor 4 (such as an electrochemical sensor 4), if airflow is directly blown to the sensor 4, high-speed airflow impact is formed on the air inlet surface of the sensor 4, which may cause adverse effects of reduced sensitivity or unstable signal. A circular baffle plate 11 is arranged on the inner shell 5 of the dust cover opposite to the center of the sensor 4, so that high-speed airflow entering from an air pipe during calibration and high-speed airflow impacting on the sensor 4 during normal monitoring use are prevented. The air flow is blocked by the circular baffle plate 11, the speed of the air flow is reduced, and the air flow enters the air chamber 12 through the edge gap to be detected by the sensor 4.
Further, the bottom of the sensor 4 is provided with an explosion-proof sheet 10. When explosion occurs in the product, the flame cannot be discharged to the outside through the explosion-proof sheet 10, and meanwhile, the gas inside and outside the product circulates or exchanges through the explosion-proof sheet 10. The explosion-proof sheet 10 is generally formed by sintering fine metal particles or a metal wire mesh.
Further, a potting adhesive layer 14 is arranged on the top of the sensor 4.
The utility model discloses the concrete working process of dust cover of tape specification function as follows:
when the calibration gas (with known concentration) is detected, the gas receiving port 8 is connected with the calibration gas, the calibration gas enters the dust cover outer shell 6 and the dust cover inner shell 5 in sequence through the vent hole of the gas receiving port 8, then enters the gas chamber 12 through the filter screen 7, the sensor 4 senses the concentration of the entered calibration gas, the sensed gas concentration signal is transmitted to the gas detector 2 through the signal power line 3 to be analyzed and processed to judge the gas concentration, the result detected by the gas detector 2 is compared with the concentration of the calibration gas, if the detected concentration is consistent with the concentration of the calibration gas, the gas detector 2 has the detection capability and can be continuously used, if the detected concentration is inconsistent with the concentration of the calibration gas, the gas detector 2 has detection errors, and needs to be repaired and adjusted.
After the detection accuracy of the gas detector is verified by adopting the calibration gas, the gas with unknown gas concentration can be detected in the following way:
when the gas which can be directly introduced into the gas inlet 8 is detected, the detection process is the same as the detection process of the calibration gas, and finally the gas detector 2 is used for analyzing, processing, judging and displaying the gas concentration.
When detecting the free diffusible gas (the premise of detecting unknown gas is that the detection accuracy of the gas detector 2 is verified by calibration gas), for example, air enters the dust cover outer shell 6 and the dust cover inner shell 5 in sequence from the vent hole of the dust cover outer shell 6 and the vent hole on the gas receiving port 8, then enters the gas chamber 12 through the filter screen 7, the sensor 4 senses the entering calibrated gas concentration, and transmits the sensed gas concentration signal to the gas detector 2 through the signal power line 3 for analysis processing and gas concentration display.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The utility model provides a dust cover of function is markd in area, its characterized in that includes the gas detector casing, is located the inside gas detector who just communicates each other of gas detector casing, signal power line and sensor, gas detector chassis bottom is provided with dustproof unit, dustproof unit includes the dust cover shell, installs dust cover inner shell and filter screen in the dust cover shell, be provided with the air vent on the dust cover shell body, be provided with the air vent on the dust cover inner shell, still be provided with the gas receiving mouth with dust cover inner shell and filter screen intercommunication in the dust cover shell.
2. The dust cover with calibration function of claim 1, wherein the gas detector housing comprises a spherical shell and a neck end connected with the dust cover, and the sensor is located in the neck end.
3. A dust cover with calibration function as claimed in claim 1, wherein the sensor is fixed in the neck end of the gas detector housing by a sensor bracket.
4. The dust boot with calibration function of claim 1, wherein said air receiving opening is in the shape of an inverted cone.
5. The dust cover with calibration function of claim 4, wherein the vent hole of the inverted cone-shaped air receiving opening is positioned at the bottom of the inverted cone.
6. The dust cover with calibration function as claimed in claim 1, wherein the inner wall of the dust cover housing is provided with a flow guiding rod, and a vent hole is left between the flow guiding rod and the outer wall of the air receiving port.
7. A dust boot with calibration function as claimed in claim 1, wherein said dust boot inner housing is provided with a catch.
8. The dust cover with calibration function of claim 1, wherein the bottom of the sensor is provided with an explosion-proof sheet.
9. The dust cover with calibration function of claim 1, wherein the top of the sensor is provided with a potting adhesive layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920623892.9U CN210166366U (en) | 2019-05-05 | 2019-05-05 | Dust cover with calibration function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920623892.9U CN210166366U (en) | 2019-05-05 | 2019-05-05 | Dust cover with calibration function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210166366U true CN210166366U (en) | 2020-03-20 |
Family
ID=69791944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920623892.9U Active CN210166366U (en) | 2019-05-05 | 2019-05-05 | Dust cover with calibration function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210166366U (en) |
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2019
- 2019-05-05 CN CN201920623892.9U patent/CN210166366U/en active Active
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