CN109115259B - Standard gas conveying device - Google Patents
Standard gas conveying device Download PDFInfo
- Publication number
- CN109115259B CN109115259B CN201811035559.2A CN201811035559A CN109115259B CN 109115259 B CN109115259 B CN 109115259B CN 201811035559 A CN201811035559 A CN 201811035559A CN 109115259 B CN109115259 B CN 109115259B
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- standard
- calibration
- gas
- blowing nozzle
- communicated
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- 238000007664 blowing Methods 0.000 claims abstract description 91
- 238000007789 sealing Methods 0.000 claims abstract description 62
- 230000007246 mechanism Effects 0.000 claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000013461 design Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 121
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
Abstract
The invention provides a standard gas conveying device, which comprises a standard cover, a blowing nozzle for conveying standard gas to a detector to be calibrated and a standard control mechanism, wherein the blowing nozzle is used for conveying the standard gas to the detector to be calibrated; the calibration cover is provided with an air inlet channel; the air blowing nozzle is provided with a standard air inlet and a standard air outlet which are communicated with each other, and the standard control mechanism drives the air blowing nozzle to slide in the standard cover; when the blowing nozzle is in an opening state, the standard gas inlet is communicated with the gas inlet channel in a sealing way, and the standard gas outlet is communicated with the gas inlet of the detector to be calibrated; when the blowing nozzle is in a closed state, the standard gas inlet is not communicated with the gas inlet channel. The invention has the advantages of scientific design, strong practicability, time and labor saving, high production efficiency and reliable production quality.
Description
Technical Field
The invention relates to the technical field of detector calibration and detection, in particular to a standard gas conveying device.
Background
The JJG 693-2011 'flammable gas detection alarm' verification procedure provides clear requirements for gas alarm verification conditions, such as gas standard substances, calibration covers, and the like, and a special calibration cover is required for a diffusion instrument.
In the production process of the gas detector, the corresponding standard gas is required to be calibrated according to the detected gas type, and the calibration and the inspection of the gas detector product are necessary technological processes. At present, there are two calibration methods: (1) The detector to be calibrated is put into an air box, and the air box is filled with gases with different concentrations for calibration, and the defects are that: the calibration method is complicated, and the data is inconvenient to record and store during calibration. (2) Firstly, a calibration cover is screwed on the detector, then an air pipe is inserted into the calibration cover, then the detector is blown, and the calibration air is directly passed through each detector to be detected.
The current gas detector calibration and detection equipment is relatively backward, and the operation process is labor-consuming and time-consuming, and wastes gas; during mass production, the production efficiency is greatly reduced.
In order to solve the above problems, an ideal technical solution is always sought.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art, thereby providing the standard gas conveying device which has scientific design, strong practicability, time and labor saving, high production efficiency and reliable production quality.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the calibration gas conveying device comprises a calibration cover, a blowing nozzle for conveying calibration gas to a detector to be calibrated and a calibration control mechanism;
the calibration cover is provided with an air inlet channel;
the air blowing nozzle is provided with a standard air inlet and a standard air outlet which are communicated with each other, and the standard control mechanism drives the air blowing nozzle to slide in the standard cover;
when the blowing nozzle is in an opening state, the standard gas inlet is communicated with the gas inlet channel in a sealing way, and the standard gas outlet is communicated with the gas inlet of the detector to be calibrated;
when the blowing nozzle is in a closed state, the standard gas inlet is not communicated with the gas inlet channel.
Based on the above, a sealing sleeve is arranged at the end part of the calibration cover, the blowing nozzle is provided with a standard gas return channel, the calibration cover is provided with an air outlet channel, and one end of the air outlet channel is communicated with one end of the standard gas return channel;
when the blowing nozzle is in an open state, the other end of the sealing sleeve is in sealing connection with the end part of the detector to be calibrated, and the other end of the standard gas return channel is communicated with the sealing sleeve;
when the blowing nozzle is in a closed state, the other end of the standard gas return channel is not communicated with the sealing sleeve.
Based on the above, a cylindrical cavity is arranged in the calibration cover, and the air blowing nozzle is arranged in the calibration cover in a sliding manner through an O-shaped sealing ring.
Based on the above, the blowing nozzle is fixedly connected with the calibration control mechanism through the connecting piece, one end of the connecting piece is sleeved at the telescopic end of the calibration control mechanism, and the other end of the connecting piece is clamped on the blowing nozzle.
Based on the above, the calibration control mechanism adopts a calibration cylinder.
Based on the above, the standard gas conveying device further comprises a support, wherein the support comprises a horizontal support plate and a vertical support plate perpendicular to the horizontal support plate, and a through hole for allowing the telescopic end of the standard control mechanism to pass through is formed in the vertical support plate.
Based on the above, the air inlet channel is provided with an air inlet joint, and the air outlet channel is provided with an air outlet joint.
Based on the above, the diameter of the calibration gas outlet is smaller than the diameter of the end part of the calibration cover.
Based on the above, the blowing nozzle comprises a base and a sealing member arranged at one end of the base;
the standard gas inlet is vertically arranged on one side of the base, and the standard gas return channel is transversely arranged on the other side of the base;
the air outlet of the standard air is communicated with the air inlet of the standard air and transversely penetrates through the sealing component.
Based on the above, the sealing sleeve is a rubber three-layer corrugated sucker.
Compared with the prior art, the invention has outstanding substantive characteristics and remarkable progress, and concretely comprises the following steps:
1) The invention provides a standard gas conveying device, which comprises a standard cover, a blowing nozzle for conveying standard gas to a detector to be calibrated and a standard control mechanism, wherein the blowing nozzle is used for conveying the standard gas to the detector to be calibrated; when the blowing nozzle is in an opening state, the standard gas inlet is communicated with the gas inlet channel in a sealing way, and the standard gas outlet is communicated with the gas inlet of the detector to be calibrated so as to open the blowing nozzle and convey the standard gas to the detector to be calibrated; when the blowing nozzle is in a closed state, the standard gas inlet is not communicated with the gas inlet channel so as to close the blowing nozzle; the blowing calibration of the detector is realized, automatic calibration equipment is provided, and the calibration efficiency is improved;
2) The end part of the calibration cover is provided with a sealing sleeve, the blowing nozzle is provided with a standard gas return channel, the calibration cover is provided with an air outlet channel, and one end of the air outlet channel is communicated with one end of the standard gas return channel; when the blowing nozzle is in an open state, the other end of the sealing sleeve is in sealing connection with the end part of the detector to be calibrated, the other end of the standard gas return channel is communicated with the sealing sleeve, and the standard gas is conveyed to the detector to be calibrated and is received to return from the detector to be calibrated; the waste of calibration gas is avoided, and the cost is saved;
3) An O-shaped sealing ring is arranged on the air blowing nozzle and used for separating left and right cylindrical cavities of the calibration cover to form two spaces, namely a left space and a right space. An O-shaped sealing ring arranged on the air blowing nozzle ensures that the calibration gas is not leaked; the left side space and the right side space are communicated through the standard gas return channel, so that switching of a blowing state is conveniently realized, and when the blowing nozzle is in an open state, a standard gas return channel is formed, so that the function of returning gas to the standard gas conveying device of the next detector is realized;
4) The air inlet channel of the standard gas conveying device is communicated with the air outlet channel of the adjacent standard gas conveying device in a sealing way to form a serial standard gas conveying channel; the serial type blowing calibration is realized by using the standard gas conveying devices of the plurality of detectors in series, and the multi-path gas is changed into one-path gas, so that the use amount of the gas is greatly reduced, and the cost is reduced;
in conclusion, the invention has the advantages of scientific design, strong practicability, time and labor saving, high production efficiency and reliable production quality.
Drawings
Fig. 1 is a schematic structural view of a label gas conveying device of the present invention.
Fig. 2 is a schematic top view of the standard gas conveying mechanism of the present invention.
Fig. 3 is a schematic side view of the label air conveying mechanism of the present invention.
Fig. 4 is a cross-sectional view of the opening of the label feed mechanism of the present invention.
Fig. 5 is a cross-sectional view of the label feed mechanism of the present invention closed.
FIG. 6 is a cross-sectional view of a blow nozzle of the present invention.
In the figure: 1. a calibration cover; 2. an air blowing nozzle; 3. calibrating a control mechanism; 4. a support; 5. an air outlet joint; 6. sealing sleeve; 7. an air inlet joint; 8. a connecting piece; 11. an air intake passage; 12. an air outlet channel; 21. a standard gas inlet; 22. a standard gas outlet; 23. a standard gas return channel; 24. a base; 25. and a sealing member.
Detailed Description
The technical scheme of the invention is further described in detail through the following specific embodiments.
Example 1
The device comprises a calibration cover 1, a blowing nozzle 2 for conveying calibration gas to a detector to be calibrated, and a calibration control mechanism 3;
the calibration cover 1 is provided with an air inlet channel 11;
the air blowing nozzle 2 is provided with a standard air inlet 21 and a standard air outlet 22 which are communicated with each other, and the standard control mechanism 3 drives the air blowing nozzle 2 to slide in the standard cover 1 so as to control the air blowing state of the air blowing nozzle 2;
when the blowing nozzle 2 is in an open state, the standard gas inlet 21 is communicated with the gas inlet channel 11 in a sealing way, and the standard gas outlet 22 is communicated with the gas inlet of the detector to be calibrated;
when the blowing nozzle 2 is in the closed state, the target gas inlet 21 is not communicated with the gas inlet passage 11.
The working process of the implementation is as follows: when the air blowing nozzle 2 is in an open state, the calibration control mechanism 3 drives the air blowing nozzle 2 to act, the calibration air inlet 21 of the air blowing nozzle 2 is communicated with the air inlet channel 11 in a sealing way, calibration air enters the calibration air outlet 22 of the air blowing nozzle 2 from the air inlet channel 11 of the calibration cover 1, enters the detector to be calibrated through the probe, and transmits the calibration air to the detector to be calibrated, so that the aim of opening the calibration air conveying device is fulfilled.
The calibration control mechanism 3 drives the blowing nozzle 2 to act, so that when the blowing nozzle 2 is in a closed state, the calibration gas inlet 21 is not communicated with the gas inlet channel 11, and the calibration gas cannot enter the blowing nozzle 2 and cannot be conveyed to the detector to be calibrated, thereby achieving the purpose of closing the calibration gas conveying device
Example 2
This embodiment differs from embodiment 1 in that: as shown in fig. 1-5, a sealing sleeve 6 is arranged at the end part of the calibration cover 1, the blowing nozzle 2 is provided with a target gas return channel 23, the calibration cover 1 is provided with an air outlet channel 12, and one end of the air outlet channel 12 is communicated with one end of the target gas return channel 23;
when the blowing nozzle 2 is in an open state, the other end of the sealing sleeve 6 is in sealing connection with the end part of the detector to be calibrated, and the other end of the standard gas return channel 23 is communicated with the sealing sleeve 6;
when the blowing nozzle 2 is in a closed state, the other end of the standard gas return channel 23 is not communicated with the sealing sleeve 6.
The working process of the implementation is as follows: as shown in fig. 4, the blowing nozzle 2 is in an open state; the air inlet 21 of the air blowing nozzle 2 is communicated with the air inlet channel 11 in a sealing way, one end of the sealing sleeve 6 is connected with the end part of the detector to be calibrated in a sealing way, and the other end of the air return channel 23 is communicated with the other end of the sealing sleeve 6. At this time, the calibration gas sequentially passes through the gas inlet 21, the gas outlet 22 and the sealing sleeve 6 from the gas inlet channel 11 of the calibration cover 1, and enters the detector to be calibrated for calibration; simultaneously, the gas is returned to the calibration cover 1 through the sealing sleeve 6, and is discharged out of the gas conveying device through the sealing sleeve 6, the gas return channel 23 and the gas outlet channel 12 in sequence.
As shown in fig. 5, the blowing nozzle 2 is in a closed state; the standard gas inlet 21 of the blowing nozzle 2 is not communicated with the gas inlet channel 11, and the standard gas return channel 23 of the blowing nozzle 2 is not communicated with the sealing sleeve 6. The calibration gas cannot enter the blowing nozzle 2 from the air inlet channel 11, and at this time, the calibration gas enters the calibration cover 1, and is directly discharged from the air outlet channel 12 of the calibration cover 1.
Specifically, the diameter of the calibration gas outlet 22 is smaller than the diameter of the end of the calibration cap 1.
As shown in fig. 6, the blowing nozzle 2 includes a base 24 and a sealing member 25 provided at one end of the base 24; the standard gas inlet 21 is vertically arranged on one side of the base 24, and the standard gas return channel 23 is transversely arranged on the other side of the base 24; the standard gas outlet 22 is communicated with the standard gas inlet 21 and transversely penetrates through the sealing member 25; an O-ring is provided on the sealing member 25.
Specifically, a cylindrical cavity is arranged in the calibration cover 1, and the air blowing nozzle 2 is slidably arranged in the calibration cover 1 through an O-shaped sealing ring. The O-shaped sealing ring arranged on the blowing nozzle 2 is used for separating the left and right cylindrical cavities of the calibration cover 1 to form two spaces, namely a left space and a right space, so that the calibration gas in the calibration cover 1 is prevented from leaking from the left space to the right space; the right space is communicated with the left space through the standard gas return channel 23, so that the switching of the blowing state is convenient to realize; and when the blowing nozzle is in an open state, a calibration gas backflow channel is formed, so that the function of backflow of the calibration gas into the calibration gas conveying device of the next detector is realized.
When the blowing nozzle 2 is in an open state, a gap exists between the standard gas outlet 22 and the end part of the standard cover 1, and standard gas can enter a right side space of the standard cover from the sealing sleeve 6; the gap, the standard gas return channel and the gas outlet channel form a standard gas return channel; when the blowing nozzle 2 is in a closed state, the base 24 is attached to the inner side edge of the end part of the calibration cover 1, the sealing member 25 is attached to the end part of the calibration cover 1, and the O-shaped sealing ring ensures tightness, so that gas in the sealing sleeve 6 cannot enter the calibration cover 1.
In order to increase the tightness of the standard gas conveying device, the end part of the standard gas conveying device is provided with a sealing sleeve 6, and the sealing sleeve 6 is connected with the standard gas conveying device 1 and a detector to be calibrated; when the air blowing nozzle 2 blows air to a probe in a probe seat of a detector to be calibrated, the sealing sleeve 6 plays a sealing role, so that the air in the cavity of the calibration cover 1 is not leaked; the sealing sleeve 6 is a rubber three-layer corrugated sucker.
Example 3
This embodiment differs from embodiment 2 in that: the calibration control mechanism 3 adopts a calibration cylinder.
Specifically, the air blowing nozzle 2 is fixedly connected with the calibration cylinder through a connecting piece 8; one end of the connecting piece 8 is sleeved at the telescopic end of the calibration cylinder, and the other end of the connecting piece is clamped on the blowing nozzle 2 through a clamping spring retainer ring. The air inlet 21 of the air blowing nozzle 2 is matched with the air inlet channel 11 of the calibration cover 1, and moves back and forth in the cylindrical cavity of the calibration cover 1 along the axial direction under the action of the calibration cylinder, so that the state switching of blowing or closing blowing of the detector is realized, and the automatic control of the air blowing conveying device can be realized by controlling the calibration cylinder, thereby saving time and labor.
The telescopic end of the calibration cylinder reciprocates to drive the blowing nozzle 2 to move in the calibration cover 1, when the telescopic end of the calibration cylinder is retracted, the blowing nozzle 2 is in a first position, and at the moment, the blowing nozzle 2 is in an open state, can blow gas to a detector to be calibrated and receive calibration gas returned from the detector to be calibrated; when the telescopic end of the calibration cylinder stretches out, the air blowing nozzle 2 is in a second position, and at the moment, the air blowing nozzle 2 is in a closed state, the detector to be calibrated cannot be blown, calibration cannot be performed, and the calibration gas is directly discharged from the gas outlet channel 12 of the calibration cover 1 after entering the calibration cover 1 from the gas inlet channel 11.
Specifically, the calibration cylinder is further connected with the PLC through a relay switch and is used for automatically controlling the blowing state of the blowing nozzle 2. The standard gas conveying device realizes automatic opening and closing, and improves the degree of automation of calibration and inspection.
Specifically, the invention also comprises a support 4, wherein the support 4 comprises a horizontal support plate and a vertical support plate which is mutually perpendicular to the horizontal support plate, and the vertical support plate is provided with a through hole for the telescopic end of the calibration control mechanism 3 to pass through.
Specifically, the calibration cover 1, the blowing nozzle 2 and the connecting piece 8 are stainless steel pieces; the O-shaped sealing ring, the clamp spring retainer ring and the quick connector are standard components; the consistency, stability and reliability of the service performance of the device are ensured.
In other embodiments, the calibration control mechanism 3 may also use other devices with telescopic functions, such as an electric telescopic rod.
Example 4
This embodiment differs from embodiment 2 in that: the air inlet channel 11 is provided with an air inlet connector 7, the air outlet channel 12 is provided with an air outlet connector 5, the air inlet connector 7 and the air outlet connector 5 are quick connectors, so that two or more similar standard air conveying devices are connected with each other conveniently to form a serial air conveying structure.
When being connected in series, the air outlet joint 5 of each standard gas conveying device is connected with the air inlet joint 7 of the adjacent standard gas conveying device to form a standard gas conveying system; the embodiment realizes the serial connection of the standard gas conveying devices of the plurality of detectors, one path of standard gas can calibrate and test the plurality of gas detectors at the same time, thereby saving gas resources, reducing cost, and having stable performance and strong reliability.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same; while the invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.
Claims (6)
1. The utility model provides a mark gas conveyor which characterized in that: the device comprises a calibration cover, an air blowing nozzle for conveying calibration gas to a detector to be calibrated and a calibration control mechanism;
the calibration cover is provided with an air inlet channel;
the air blowing nozzle is provided with a standard air inlet and a standard air outlet which are communicated with each other, and the standard control mechanism drives the air blowing nozzle to slide in the standard cover;
when the blowing nozzle is in an opening state, the standard gas inlet is communicated with the gas inlet channel in a sealing way, and the standard gas outlet is communicated with the gas inlet of the detector to be calibrated;
when the blowing nozzle is in a closed state, the standard gas inlet is not communicated with the gas inlet channel;
the end part of the calibration cover is provided with a sealing sleeve, the blowing nozzle is provided with a standard gas return channel, the calibration cover is provided with an air outlet channel, and one end of the air outlet channel is communicated with one end of the standard gas return channel;
when the blowing nozzle is in an open state, the other end of the sealing sleeve is in sealing connection with the end part of the detector to be calibrated, and the other end of the standard gas return channel is communicated with the sealing sleeve;
when the blowing nozzle is in a closed state, the other end of the standard gas return channel is not communicated with the sealing sleeve;
the blowing nozzle is fixedly connected with the calibration control mechanism through a connecting piece, one end of the connecting piece is sleeved at the telescopic end of the calibration control mechanism, and the other end of the connecting piece is clamped on the blowing nozzle;
the standard gas conveying device further comprises a support, wherein the support comprises a horizontal support plate and a vertical support plate which is mutually perpendicular to the horizontal support plate, and a through hole for a telescopic end of the standard control mechanism to pass through is formed in the vertical support plate;
the blowing nozzle comprises a base and a sealing member arranged at one end of the base; the standard gas inlet is vertically arranged on one side of the base, and the standard gas return channel is transversely arranged on the other side of the base; the standard gas outlet is communicated with the standard gas inlet and transversely penetrates through the sealing member;
the air inlet channel of the standard gas conveying device is communicated with the air outlet channel of the adjacent standard gas conveying device in a sealing way to form a serial standard gas conveying channel; the serial type blowing calibration is realized by using the gas calibration conveying devices of the plurality of detectors in series.
2. The label gas delivery device of claim 1, wherein: the calibration cover is internally provided with a cylindrical cavity, and the air blowing nozzle is arranged in the calibration cover in a sliding way through an O-shaped sealing ring.
3. The label gas delivery device of claim 1, wherein: the calibration control mechanism adopts a calibration cylinder.
4. The label gas delivery device of claim 1, wherein: the air inlet channel is provided with an air inlet joint, and the air outlet channel is provided with an air outlet joint.
5. The label gas delivery device of claim 1, wherein: the diameter of the standard gas outlet is smaller than the diameter of the end part of the standard cover.
6. The label gas delivery device of claim 1, wherein: the sealing sleeve is a rubber three-layer corrugated sucker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811035559.2A CN109115259B (en) | 2018-09-06 | 2018-09-06 | Standard gas conveying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811035559.2A CN109115259B (en) | 2018-09-06 | 2018-09-06 | Standard gas conveying device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109115259A CN109115259A (en) | 2019-01-01 |
| CN109115259B true CN109115259B (en) | 2024-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811035559.2A Active CN109115259B (en) | 2018-09-06 | 2018-09-06 | Standard gas conveying device |
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| CN (1) | CN109115259B (en) |
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