CN214173901U - Sampling probe of smoke detector - Google Patents
Sampling probe of smoke detector Download PDFInfo
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- CN214173901U CN214173901U CN202023197247.7U CN202023197247U CN214173901U CN 214173901 U CN214173901 U CN 214173901U CN 202023197247 U CN202023197247 U CN 202023197247U CN 214173901 U CN214173901 U CN 214173901U
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Abstract
The utility model discloses a sampling probe of a smoke detector, which comprises a sampling pipe, a back-blowing device, a back-blowing control unit and a filtering device; the sampling pipe is communicated with the filtering device, and the filtering device is communicated with the back flushing control unit; the back blowing device is communicated with the back blowing control unit; the gas outlet of the back-blowing control unit is communicated with the smoke detector; the back flushing device comprises a high-pressure container, a pressure relief valve and a control valve; the back-blowing control unit comprises a pipe body, a piston head and a piston actuating mechanism; the pipe body is provided with a flue gas outlet hole and a back-blowing gas inlet; the flue gas outlet hole is communicated with a flue gas detector; the back-blowing gas inlet is communicated with the high-pressure container through a pressure relief valve; the piston head slidable tube is arranged in the tube body; the piston head is provided with a through hole which communicates the circumferential surface of the piston head with one end surface of the piston head, and the end surface of the other end of the piston head is connected with a piston actuating mechanism; the utility model discloses can clear up the blowback device according to filter equipment jam condition automatic start blowback device, do not need manual operation.
Description
Technical Field
The utility model relates to a measurement detection area, concretely relates to smoke detector's sampling probe.
Background
The gas monitoring refers to the monitoring of the concentration and the total emission amount of gaseous pollutants and particulate matters emitted by an atmospheric pollution source. At present, the electricity supply of China is mainly thermal power generation. The flue gas discharged by the fire coal contains smoke dust, carbon dioxide, sulfur dioxide, nitrogen oxide and a small amount of carbon monoxide, and the smoke dust directly influences the environmental quality of the atmosphere.
At present, the detection of smoke and dust smoke is usually based on a smoke and dust smoke tester, but a sampling probe is required to collect gas of a detected sample when the detection is carried out.
When the smoke is detected again, the smoke in the smoke needs to be filtered, so that the detection result is accurate, and the smoke in the smoke is filtered by adopting a filtering device in the sampling process. But when carrying out comparatively detailed detection, the more acquisition time of the sample that needs the collection is longer, and filter equipment reduces owing to adsorb flue gas through rate behind too much smoke and dust, needs carry out the blowback to filter equipment this moment and makes filter equipment can continue the performance, just disclose a flue gas sampling pipeline blowback device like the utility model of patent number CN 203643215U.
However, the operation of the existing back-blowing device is manually controlled, that is, the sampling flow rate is manually detected, if the sampling flow rate is too low, the back-blowing device is started to clean the filtering device, and the whole process needs to manually monitor the flow rate in real time and control the back-blowing device.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned defect of prior art, the utility model aims at providing a smoke detector's sampling probe, can block up the condition automatic start blowback device according to filter equipment and clear up the blowback device, do not need manual operation.
The purpose of the utility model is realized through such technical scheme:
the sampling probe of the smoke detector comprises a sampling pipe, a back-blowing device, a back-blowing control unit and a filtering device;
the sampling pipe is communicated with a filtering device, and the filtering device is communicated with a back flushing control unit; the back blowing device is communicated with the back blowing control unit; the gas outlet of the back-blowing control unit is communicated with the smoke detector;
the back flushing device comprises a high-pressure container, a pressure relief valve and a control valve;
the back-blowing control unit comprises a pipe body, a piston head and a piston actuating mechanism; the pipe body is provided with a flue gas outlet hole and a back-blowing gas inlet; the flue gas outlet hole is communicated with a flue gas detector; the back-blowing gas inlet is communicated with the high-pressure container through a pressure relief valve; the piston head slidable tube is arranged in the tube body; the piston head is provided with a through hole which communicates the circumferential surface of the piston head with one end surface of the piston head, and the end surface of the other end of the piston head is connected with a piston actuating mechanism;
when the pipe body is communicated with the smoke detector, the back-blowing gas inlet is closed by the piston head; when the pipe body is communicated with the back-blowing gas inlet, the smoke gas outlet hole is sealed by the piston head;
the piston actuating mechanism is communicated with the high-pressure container through a control valve; the piston actuating mechanism is fixedly connected with the pipe body.
Furthermore, the piston actuating mechanism comprises a round pipe with one sealed end, a pressing sheet which is positioned in the round pipe and slides to be sealed with the inner wall of the round pipe, a support rod which is fixedly connected with the pressing sheet and has one end extending out of the opening of the round pipe, and a spring part of which the two ends are respectively connected with the pressing sheet and the piston head;
the high-pressure container is communicated with a closed space formed by the round pipe and the pressing sheet through a control valve; the circular tube is fixedly connected with the tube body.
Furthermore, the spring part comprises a spring, a mounting piece fixedly connected with two ends of the spring and an extension tube; the spring is positioned in the telescopic pipe; the mounting sheet is provided with a clamping sheet; a strip-shaped gap which penetrates through the clamping piece and the mounting piece is reserved between the clamping piece and the mounting piece;
the pressing sheet and the piston head are provided with inserting sheets bent in an arc shape; the inserted sheet is inserted into a gap between the mounting sheet and the card.
Further, the sampling probe of the smoke detector also comprises a pressurizer; the pressurizer is communicated with the high-pressure container.
Further, the filtering device comprises a filtering pipe, a filtering net and an air equalizing net; the air equalizing net and the filter screen are sequentially arranged in the filter pipe along the air inlet direction; the air inlet of the filter pipe is communicated with the sampling pipe, and the air outlet is communicated with the pipe body.
Further, the shape of the air equalizing net is conical; a plurality of strip-shaped openings from the cone top to the cone edge are uniformly arranged on the air-equalizing net in an array manner; the width of the strip-shaped opening is increased along with the increase of the distance from the conical top; the cone top is opposite to the axis of the sampling pipe.
Further, the curvature radius of the joint of the filter pipe and the sampling pipe is not less than 0.25.
Due to the adoption of the technical scheme, the utility model discloses following advantage has:
the effect of negative pressure that receives in the body to the piston head when through setting up piston actuating mechanism and normally sampling for the piston head is in balancing unit in the body, thereby makes the sampling normally go on, blocks up the back when filter equipment, under check out test set's negative pressure effect and piston actuating mechanism's effect, and the piston head slides in the body, blocks up flue gas outlet hole, with blowback gas and body intercommunication, the gaseous filter equipment blowback of high-pressure vessel is cleared up this moment. After the pressure of the gas in the high-pressure container is released, the piston head resets and moves under the action of the piston actuating mechanism, the smoke gas outlet hole is communicated with the instrument, and the instrument performs normal sampling detection again.
The back-blowing cleaning is automatically completed in the whole sampling process, and manual operation is not needed.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
The drawings of the utility model are as follows:
fig. 1 is a schematic structural view of a sampling probe of the smoke detector in embodiment 1.
Fig. 2 is an enlarged schematic view of a portion a in fig. 1.
Fig. 3 is an enlarged schematic view of B in fig. 2.
Fig. 4 is an enlarged schematic view of the structure at C in fig. 1.
In the figure: 1. a sampling tube; 21. a high pressure vessel; 22. a pressure relief valve; 23. a control valve; 31. a pipe body; 311. a flue gas outlet hole; 312. a blowback gas inlet; 32. a piston head; 321. a through hole; 331. a circular tube; 332. tabletting; 333. a stay bar; 3341. a spring; 3342. mounting a sheet; 3343. a telescopic pipe; 3344. a card; 41. a filter tube; 42. a filter screen; 421. a strip-shaped opening; 43. a wind equalizing net; 5. inserting sheets; 6. a pressurizer.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Example (b):
as shown in fig. 1 to 4, the sampling probe of the smoke detector comprises a sampling pipe 1, a back-blowing device, a back-blowing control unit and a filtering device;
the sampling pipe 1 is communicated with a filtering device, and the filtering device is communicated with a back flushing control unit; the back blowing device is communicated with the back blowing control unit; the gas outlet of the back-blowing control unit is communicated with the smoke detector;
the back flushing device comprises a high-pressure container 21, a pressure relief valve 22 and a control valve 23;
the back-blowing control unit comprises a pipe body 31, a piston head 32 and a piston actuating mechanism; the pipe body 31 is provided with a flue gas outlet 311 and a back-blowing gas inlet 312; the flue gas outlet 311 is communicated with a flue gas detector; the blowback gas inlet 312 is communicated with the high-pressure container 21 through the pressure relief valve 22; the piston head 32 is slidably mounted in the tube body 31; the piston head 32 is provided with a through hole 321 which communicates the circumferential surface of the piston head 32 with one end surface of the piston head 32, and the end surface of the other end of the piston head 32 is connected with a piston actuating mechanism;
when the pipe body 31 is communicated with the smoke detector, the back-blowing gas inlet 312 is closed by the piston head 32; when the pipe body 31 is communicated with the back-blowing gas inlet 312, the smoke outlet 311 is sealed by the piston head 32;
the piston actuator is communicated with the high-pressure container 21 through a control valve 23; the piston actuator is fixedly connected to the tube 31.
Negative pressure that receives in the body 31 is to the effect of piston head 32 through setting up piston actuating mechanism and normal sampling time for the piston head 32 is in balancing unit in the body 31, thereby make the sampling normally go on, after filter equipment blocks up, under check out test set's negative pressure effect and piston actuating mechanism's effect, piston head 32 slides in the body 31, block up flue gas venthole 311, gaseous and body 31 intercommunication of blowback, gaseous in the high pressure vessel 21 clears up the filter equipment blowback this moment. After the pressure of the gas in the high-pressure container 21 is released, the piston head 32 is reset and moves under the action of the piston actuating mechanism, the smoke gas outlet 311 is communicated with the instrument, and the instrument performs normal sampling detection again.
The back-blowing cleaning is automatically completed in the whole sampling process, and manual operation is not needed.
Specifically, the piston actuator comprises a circular tube 331 with one sealed end, a pressing sheet 332 which is positioned in the circular tube 331 and slides in the circular tube 331 and is sealed with the inner wall of the circular tube 331, a support rod 333 which is fixedly connected with the pressing sheet 332 and has one end extending out of the circular tube 331 and an opening, and a spring element of which the two ends are respectively connected with the pressing sheet 332 and the piston head 32;
the high-pressure container 21 is communicated with a closed space formed by the circular tube 331 and the pressing sheet 332 through the control valve 23; the circular tube 331 is fixed to the tube 31.
Through arranging the pressing sheet 332 in the circular tube 331, which can change the position according to the pressure change of the high-pressure container 21, after the filter screen 42 is decompressed and cleaned in the high-pressure container 21, the pressing sheet 332 moves towards the bottom of the circular tube 331 under the action of the spring 3341. So that sampling is automatically continued after cleaning of filter screen 42 is completed.
Specifically, the spring element comprises a spring 3341, an installation piece 3342 fixedly connected with two ends of the spring 3341 and an extension tube 3343; the spring 3341 is located within the extension tube 3343; the mounting piece 3342 is provided with a clamping piece 3344; a strip-shaped gap is reserved between the clamping piece 3344 and the mounting piece 3342;
the pressing sheet 332 and the piston head 32 are provided with inserting sheets 5 bent in an arc shape; the insertion piece 5 is inserted into a gap between the mounting piece 3342 and the card 3344.
The spring 3341 with the telescopic tube 3343 can ensure that the force of the spring 3341 on the piston head 32 and the pressing sheet 332 is stable and axial, and meanwhile, the spring part is arranged to be replaceable and detachable, so that the time for cleaning the filter screen 42 can be set according to the actual sampling requirement.
Specifically, the sampling probe of the smoke detector also comprises a pressurizer 6; the pressurizer 6 communicates with the high-pressure tank 21.
The high-pressure vessel 21 can be continuously supplied with high-pressure gas by the pressurizer 6, so that the filter net 42 can be cleaned repeatedly.
Specifically, the filtering device comprises a filtering pipe 41, a filtering net 42 and an air-equalizing net 43; the air equalizing net 43 and the filter screen 42 are sequentially arranged in the filter pipe 41 along the air inlet direction; the air inlet of the filter pipe 41 is communicated with the sampling pipe 1, and the air outlet is communicated with the pipe body 31.
Specifically, the air-equalizing net 43 is conical; a plurality of strip-shaped openings 421 from the cone top to the cone edge are uniformly arranged on the wind-equalizing net in an array manner; the width of the strip-shaped opening 421 increases as the distance from the conical top increases; the cone top is opposite to the axis of the sampling tube 1.
The air-equalizing net 43 is arranged in the filter pipe 41, so that the smoke collected by the sampling pipe 1 can be uniformly distributed on the filter screen 42, and the smoke accumulated on the filter screen 42 can not be completely concentrated at the center, thereby being convenient for cleaning during back blowing.
Specifically, the radius of curvature of the joint of the filter tube 41 and the sampling tube 1 is not less than 0.25.
When the back blowing is convenient, the smoke dust is discharged out of the filter pipe 41 and the sampling pipe 1.
The sampling probe of the smoke detector of the embodiment has the following working principle: according to the sampling flow rate requirement and the condition of the filter screen 42, spring members with proper elasticity coefficients are selected to be arranged on the piston head 32 and the pressing sheet 332, so that the smoke outlet 311 is communicated with the pipe body 31, and the blowback gas inlet 312 is closed. Injecting high-pressure gas into the high-pressure vessel 21 through the pressurizer 6, and then opening the relief valve 22 and the control valve 23;
the sampling pipe 1 is inserted into the sampling area, the detector is started, smoke and dust smoke enters the filter pipe 41 under the action of the detector, and gas uniformly passes through the filter plate and then enters the detector through the pipe body 31 and the smoke outlet 311 under the action of the air equalizing plate. At this time, the pressing piece 332 is kept stable and does not displace under the action of the high-pressure gas and the spring member.
After the filter screen 42 is blocked by smoke dust, smoke gas can not smoothly enter the detector, but under the continuous negative pressure action of the detector, the piston head 32 is attracted by negative pressure, so that the piston head 32 moves, finally, the piston head 32 seals the smoke gas outlet 311, the through hole 321 of the piston head 32 is communicated with the inside of the high-pressure container 21, at the moment, the spring 3341 is attracted by the tensile force, high-pressure gas in the high-pressure container 21 is blown to the filter screen 42, and the smoke dust on the filter screen 42 is discharged through the air equalizing net 43 and the sampling pipe 1.
When the exhaust pressure of the gas in the high-pressure container 21 is reduced, the piston head 32 is reset under the pulling force of the spring 3341, and the sampling tube 1 can continue to work, and at this time, the filter screen 42 can be cleaned again only by starting the pressurizer 6 again to inject the high-pressure gas into the high-pressure container 21.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.
Claims (7)
1. The sampling probe of the smoke detector is characterized by comprising a sampling pipe, a back flushing device, a back flushing control unit and a filtering device;
the sampling pipe is communicated with a filtering device, and the filtering device is communicated with a back flushing control unit; the back blowing device is communicated with the back blowing control unit; the gas outlet of the back-blowing control unit is communicated with the smoke detector;
the back flushing device comprises a high-pressure container, a pressure relief valve and a control valve;
the back-blowing control unit comprises a pipe body, a piston head and a piston actuating mechanism; the pipe body is provided with a flue gas outlet hole and a back-blowing gas inlet; the flue gas outlet hole is communicated with a flue gas detector; the back-blowing gas inlet is communicated with the high-pressure container through a pressure relief valve; the piston head slidable tube is arranged in the tube body; the piston head is provided with a through hole which communicates the circumferential surface of the piston head with one end surface of the piston head, and the end surface of the other end of the piston head is connected with a piston actuating mechanism;
when the pipe body is communicated with the smoke detector, the back-blowing gas inlet is closed by the piston head; when the pipe body is communicated with the back-blowing gas inlet, the smoke gas outlet hole is sealed by the piston head;
the piston actuating mechanism is communicated with the high-pressure container through a control valve; the piston actuating mechanism is fixedly connected with the pipe body.
2. The sampling probe of the smoke detector according to claim 1, wherein the piston actuator comprises a round tube with one sealed end, a pressing sheet located in the round tube and sliding and sealed with the inner wall of the round tube, a support rod fixedly connected with the pressing sheet and with one end extending out of the opening of the round tube, and a spring part with two ends respectively connected with the pressing sheet and the piston head;
the high-pressure container is communicated with a closed space formed by the round pipe and the pressing sheet through a control valve; the circular tube is fixedly connected with the tube body.
3. The sampling probe of the smoke detector of claim 2, wherein the spring member comprises a spring, a mounting piece fixedly connected with two ends of the spring and a telescopic tube; the spring is positioned in the telescopic pipe; the mounting sheet is provided with a clamping sheet; a strip-shaped gap which penetrates through the clamping piece and the mounting piece is reserved between the clamping piece and the mounting piece;
the pressing sheet and the piston head are provided with inserting sheets bent in an arc shape; the inserted sheet is inserted into a gap between the mounting sheet and the card.
4. The sampling probe of the smoke detector according to claim 1, wherein the sampling probe of the smoke detector further comprises a pressurizer; the pressurizer is communicated with the high-pressure container.
5. The sampling probe of the smoke detector according to claim 1, wherein the filtering device comprises a filtering pipe, a filtering net and a wind-equalizing net; the air equalizing net and the filter screen are sequentially arranged in the filter pipe along the air inlet direction; the air inlet of the filter pipe is communicated with the sampling pipe, and the air outlet is communicated with the pipe body.
6. The sampling probe of the smoke detector according to claim 5, wherein the shape of the air-equalizing net is a cone; a plurality of strip-shaped openings from the cone top to the cone edge are uniformly arranged on the air-equalizing net in an array manner; the width of the strip-shaped opening is increased along with the increase of the distance from the conical top; the cone top is opposite to the axis of the sampling pipe.
7. The sampling probe of claim 5, wherein the radius of curvature of the joint of the filter tube and the sampling tube is not less than 0.25.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023197247.7U CN214173901U (en) | 2020-12-25 | 2020-12-25 | Sampling probe of smoke detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023197247.7U CN214173901U (en) | 2020-12-25 | 2020-12-25 | Sampling probe of smoke detector |
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| Publication Number | Publication Date |
|---|---|
| CN214173901U true CN214173901U (en) | 2021-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023197247.7U Active CN214173901U (en) | 2020-12-25 | 2020-12-25 | Sampling probe of smoke detector |
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| CN (1) | CN214173901U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115124001A (en) * | 2022-06-28 | 2022-09-30 | 山东航和医疗设备有限公司 | Molecular sieve oxygen generator and use method thereof |
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2020
- 2020-12-25 CN CN202023197247.7U patent/CN214173901U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115124001A (en) * | 2022-06-28 | 2022-09-30 | 山东航和医疗设备有限公司 | Molecular sieve oxygen generator and use method thereof |
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