CN111089762B - Gun head of portable dust concentration detection device - Google Patents
Gun head of portable dust concentration detection device Download PDFInfo
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- CN111089762B CN111089762B CN202010141183.4A CN202010141183A CN111089762B CN 111089762 B CN111089762 B CN 111089762B CN 202010141183 A CN202010141183 A CN 202010141183A CN 111089762 B CN111089762 B CN 111089762B
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- 238000001514 detection method Methods 0.000 title claims abstract description 51
- 239000000428 dust Substances 0.000 title claims abstract description 28
- 238000005070 sampling Methods 0.000 claims abstract description 61
- 238000004891 communication Methods 0.000 claims abstract description 33
- 238000007789 sealing Methods 0.000 claims description 15
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 239000011148 porous material Substances 0.000 description 6
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N1/2258—Sampling from a flowing stream of gas in a stack or chimney
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Engineering & Computer Science (AREA)
- Dispersion Chemistry (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a gun head of a portable dust concentration detection device, which comprises a first barrel and a second barrel, wherein a gas supply core body is embedded in the first barrel, an annular zero gas supply cavity is arranged on the gas supply core body, a zero gas supply joint is welded on the gas supply core body, a communication hole is arranged in the gas supply core body, a sampling tube head is detachably arranged at the front end of the first barrel, an inner cavity of the sampling tube head is communicated with one end of the communication hole, the first barrel is detachably connected to the front end of the second barrel, a connecting block is arranged on the second barrel, an air inlet channel and an air return channel are arranged on the connecting block, one end of the air inlet channel is connected with a flow velocity detection air inlet pipe, the other end of the air return channel is connected with an air inlet pipe joint, and one end of the air return channel is connected with a flow velocity detection air return pipe; the first cylinder is detachably connected with the outer tube. The gun head is convenient to disassemble and assemble, and enables zero gas and sampling gas to be mixed better and uniformity to be better.
Description
Technical Field
The invention relates to a gun head, in particular to a gun head of a portable dust concentration detection device.
Background
The dust concentration detection device samples gas from an environment to be detected, and then the sampled gas is introduced into a dust concentration detection sensor to obtain a dust concentration value. The portable dust concentration detection device is optimized in portable treatment on the basis of detection, so that the dust concentration detection device can be moved to different places more conveniently for detection. In portable optimization of the dust concentration detection device, however, the gun head of the dust concentration detection device has a reasonable structure, the gun head is used for extending into an environment to be detected, the current gun head comprises a sampling main pipe, the front end of the sampling main pipe is bent, a zero gas inlet pipe orifice is arranged at the outer part of the front section of the sampling main pipe and is used for connecting zero gas, then the zero gas is directly supplied into the sampling main pipe to dilute the sampling gas, meanwhile, the zero gas supply of the current gun head is exposed outside, the zero gas inlet is uneven, and secondly, the gun head needs to bear the weight of the longer sampling main pipe better due to the fact that the size of the dust concentration detection device is reduced, and therefore, the gun head needs to be more compact and integrate more functions.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the gun head of the portable dust concentration detection device is convenient to disassemble and assemble, and enables zero gas and sampling gas to be mixed better and uniformity to be better.
In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides a portable dust concentration detection device's rifle head, this rifle head is installed in dust concentration detection device's front end of sampling pipe, the sampling pipe includes the outer tube and sets up the intake main pipe in the outer tube, the rifle head includes first barrel and second barrel, first barrel is embedded with the air feed core, be provided with annular zero gas and supply the cavity on the air feed core, the welding has the zero gas air feed joint with zero gas feed cavity intercommunication on the air feed core, the inside of air feed core is provided with the intercommunicating pore with zero gas feed cavity intercommunication, the front end demountable installation of first barrel has the sampling tube head, the inner chamber of sampling tube head communicates with the one end of intercommunicating pore, the other end of intercommunicating pore is provided with the screw hole that is used for being connected with the intake main pipe, first barrel demountable connection is at the front end of second barrel, install the connecting block on the second barrel, be provided with air inlet channel and air return channel on this connecting block, the one end of air inlet channel is connected with velocity detection intake pipe, the other end of air inlet channel is connected with the air inlet pipe, the one end of air return channel is connected with the air pipe joint; the flow rate detection air inlet pipe and the flow rate detection air return pipe are positioned outside the second barrel, the air return pipe joint and the air inlet pipe joint are positioned inside the second barrel, and the rear end of the first barrel is provided with a detachable structure which is detachably connected with the outer pipe.
As a preferable scheme, the periphery of the air supply core body is provided with an annular groove, the groove walls on two sides of the annular groove are in sealing fit with the first cylinder body, a zero air supply cavity is formed between the annular groove and the first cylinder body, the air supply core body is provided with an axial communication hole and a radial communication hole, the axial communication hole is used for communicating the zero air supply cavity with a zero air supply joint, and the radial communication hole is used for communicating the zero air supply cavity with the communication hole.
As a preferred scheme, the sampling tube head includes sampling tube head body, and the anterior segment of this sampling tube head body is crooked into the arc, the rear end welding of sampling tube head body has sealed head, sealed head's periphery sets up in compressing tightly the step, be provided with the through-hole in the sealed head, the through-hole communicates the inner chamber of intercommunicating pore and sampling tube head body, the terminal surface sealing fit before the terminal surface and the gas supply core of sealed head face, sealed head overcoat is equipped with the interior swivel nut with first barrel threaded connection, and this interior swivel nut extrudees on compressing tightly the step.
As a preferable scheme, an inserting hole for inserting the thermocouple is further formed in the second cylinder, and an exposing hole which is convenient for exposing the thermocouple is formed in the second cylinder.
As a preferable scheme, the periphery of the second barrel is provided with a mounting groove, the extending direction of the mounting groove is perpendicular to the central line of the second barrel, the mounting groove penetrates through the inner hole of the second barrel, a special-shaped block is fixedly embedded in the mounting groove, an embedded part is arranged on the special-shaped block and extends into the inner hole of the second barrel, the embedded part is provided with an inserting hole, and the exposed opening is arranged on the special-shaped block and is communicated with the inserting hole.
As a preferred scheme, the special-shaped block comprises mounting parts which are respectively arranged at two sides of the embedded part, the special-shaped block is placed in the mounting groove, the inner side surface of the mounting part is in plane contact with the groove bottom of the mounting groove, the special-shaped block is fixedly welded with the second cylinder body, an arc-shaped groove is formed in the outer surface of the special-shaped block, and the arc-shaped groove is communicated with the insertion hole to form an exposure opening.
As a preferred embodiment, the portion of the inner side surface of the mounting portion connected to the insertion portion is provided as a stress relief groove.
As a preferable scheme, the detachable structure comprises a connecting screw sleeve, a pressing flange is arranged on the outer tube, a threaded connecting section is arranged on the periphery of the rear end part of the second cylinder body, the connecting screw sleeve is sleeved on the outer tube and abuts against the pressing flange, and the connecting screw sleeve is in threaded connection with the threaded connecting section.
After the technical scheme is adopted, the invention has the following effects: 1. the gun head comprises a first barrel and a second barrel, wherein a gas supply core body is embedded in the first barrel, an annular zero gas supply cavity is formed in the gas supply core body, a zero gas supply connector communicated with the zero gas supply cavity is welded on the gas supply core body, a communication hole communicated with the zero gas supply cavity is formed in the gas supply core body, a sampling tube head is detachably arranged at the front end of the first barrel, the inner cavity of the sampling tube head is communicated with one end of the communication hole, a threaded hole used for being connected with a main gas inlet pipeline is formed in the other end of the communication hole, so that zero gas enters the zero gas supply cavity, and then enters the main sampling pipeline through the communication hole, and the zero gas and the sampling gas are mixed more uniformly; meanwhile, the main air inlet pipeline can be directly connected to the connecting hole in a threaded mode, and assembly is very convenient. 2, the first cylinder is detachably connected to the front end of the second cylinder, a connecting block is arranged on the second cylinder, an air inlet channel and an air return channel are arranged on the connecting block, one end of the air inlet channel is connected with a flow velocity detection air inlet pipe, the other end of the air inlet channel is connected with an air inlet pipe joint, one end of the air return channel is connected with a flow velocity detection air return pipe, and the other end of the air return channel is connected with an air return pipe joint; the flow rate detection air inlet pipe and the flow rate detection air return pipe are positioned outside the second cylinder, and the air return pipe joint and the air inlet pipe joint are positioned inside the second cylinder, so that the air return pipe joint and the air inlet pipe joint can be directly connected with a differential pressure sensor of the dust concentration detection device, and the flow rate under the environment to be detected can be obtained, for example, the flow rate of gas in smoke can be detected when a chimney is detected, and the flow rate of a main sampling pipe is conveniently controlled, so that constant-speed sampling is realized. The rear end of the first barrel is provided with a detachable structure which is detachably connected with the outer tube, so that the whole gun head is convenient to detach and mount, and subsequent maintenance and repair are convenient.
The outer periphery of the air supply core body is provided with the annular groove, the groove walls on the two sides of the annular groove are in sealing fit with the first cylinder body, the zero air supply cavity is formed between the annular groove and the first cylinder body, the air supply core body is provided with the axial communication hole and the radial communication hole, the axial communication hole is used for communicating the zero air supply cavity with the zero air supply connector, and the radial communication hole is used for communicating the zero air supply cavity with the communication hole, so that the formation of the zero air supply cavity can be realized completely through the processing of the air supply core body, and thus, the air supply core body is only required to be processed by running groove and drilling on the outer surface of the air supply core body, and the processing is more convenient.
Because the sampling tube head includes the sampling tube head body, the anterior segment of this sampling tube head body is crooked into the arc, the rear end welding of sampling tube head body has sealed head, sealed head's periphery sets up in compressing tightly the step, be provided with the through-hole in the sealed head, the through-hole communicates the inner chamber of intercommunicating pore and sampling tube head body, the terminal surface sealing fit before the terminal surface and the air feed core of the back terminal surface of sealed head, sealed head overcoat is equipped with the interior swivel nut with first barrel threaded connection, and this interior swivel nut extrudees like this on compressing tightly the step, after the sampling tube head is installed, still can guarantee fine sealedly between the preceding terminal surface of sealed head and air feed core after the adjustment crooked sampling tube head body to can adjust the angle of sampling tube head body and make its orientation in required direction, the practicality is stronger.
And because the inside of second barrel still is provided with the cartridge hole that is used for the cartridge thermocouple, be provided with the exposure mouth that makes things convenient for the thermocouple to expose on the second barrel, consequently, the thermocouple can be installed in an integrated way to the second barrel for detect the problem of awaiting measuring the environment.
Because the mounting groove is formed in the periphery of the second barrel, the extending direction of the mounting groove is perpendicular to the center line of the second barrel, the mounting groove penetrates through the inner hole of the second barrel, a special-shaped block is fixedly embedded in the mounting groove, an embedded part is arranged on the special-shaped block and extends into the inner hole of the second barrel, the embedded part is provided with the inserting hole, and the exposed opening is arranged on the special-shaped block and is communicated with the inserting hole, so that the special-shaped block is independently arranged, overall processing and installation are convenient, and the processing steps are simplified.
Because the special-shaped block comprises the mounting parts which are respectively arranged at the two sides of the embedded part, the special-shaped block is placed in the mounting groove, the inner side surface of the mounting part is in plane contact with the groove bottom of the mounting groove, the special-shaped block is fixedly welded with the second cylinder body, the arc-shaped groove is formed in the outer surface of the special-shaped block, the arc-shaped groove is communicated with the inserting hole to form an exposed opening, the special-shaped block is reasonable in structure, and the special-shaped block can be better mounted in the mounting groove by utilizing the mounting part, so that the special-shaped block and the second cylinder body can be conveniently welded.
And because the stress release groove is arranged at the part connected with the embedded part on the inner side surface of the mounting part, the stress of the inner side surface and the embedded part can be better released by utilizing the stress release groove, and the weight of the special-shaped block is reduced.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a cross-sectional view of a construction of an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of FIG. 1 at A;
FIG. 3 is a side-mounted schematic view of a second barrel;
FIG. 4 is a schematic view of the structure of the shaped block;
FIG. 5 is a right side view of FIG. 4;
in the accompanying drawings: 1. a first cylinder; 2. a second cylinder; 3. an outer tube; 31. compressing the flange; 4. a main intake pipe; 5. connecting a screw sleeve; 6. a zero gas supply joint; 7. an air inlet pipe joint; 8. a connecting block; 9. a flow rate detection air inlet pipe; 10. a gas supply core; 11. zero gas is supplied into the chamber; 12. a radial communication hole; 13. an axial communication hole; 14. a communication hole; 15. a sampling tube head body; 16. a sealing head; 161. compressing the step; 162. a through hole; 17. 18, special-shaped blocks; 181. an embedding part; 182. a mounting part; 183. a plug-in hole; 184. a stress relief groove; 185. an arc-shaped groove; 186. an inner side surface; 19. an air return pipe joint; 20. the flow rate detects the return air tube.
Detailed Description
The present invention will be described in further detail with reference to the following examples.
As shown in fig. 1 to 5, a gun head of a portable dust concentration detection device is mounted at the front end of a sampling tube of the dust concentration detection device, the sampling tube comprises an outer tube 3 and an air inlet main tube 41 arranged in the outer tube 3, the air inlet main tube 41 and the outer tube 3 are concentrically arranged, the gun head comprises a first cylinder body 1 and a second cylinder body 2, an air supply core 10 is embedded in the first cylinder body 1, the air supply core 10 is tightly matched with the first cylinder body 1, an annular zero air supply cavity 11 is arranged on the air supply core 10, a zero air supply joint 6 communicated with the zero air supply cavity 11 is welded on the air supply core 10, a communication hole 16214 communicated with the zero air supply cavity 11 is arranged inside the air supply core 10, in this embodiment, an annular groove is arranged on the periphery of the air supply core 10, an annular sealing ring is arranged between the groove walls of the two sides of the annular groove and the first cylinder body 1, the annular groove and the first cylinder body 1 form a sealing fit, the zero air supply cavity 11 is formed between the annular groove and the first cylinder body 1, the air supply core 10 is axially connected with the communication hole 3565 and the air supply cavity 3535, the communication hole 3565 is radially communicated with the air supply cavity 16225, and the communication hole 16225 is radially communicated with the zero air supply cavity 16214.
The front end demountable installation of first barrel 1 has the sampling tube head, and the inner chamber of sampling tube head communicates with the one end of intercommunicating pore 16214, and in this embodiment, the sampling tube head includes sampling tube head body 15, and the anterior segment of this sampling tube head body 15 is crooked into the arc, and during general use, the lower extreme of sampling tube head body 15 can be adjusted according to actual demand, for example when sampling in the chimney, and the lower extreme of sampling tube head body 15 then needs down, and the gas in the convenient cigarette dashes enters into in the sampling tube like this. The rear end welding of sampling tube head body 15 has sealed head 16, the periphery of sealed head 16 sets up in compressing tightly step 161, be provided with through-hole 162 in the sealed head 16, through-hole 162 communicates the communication hole 16214 with the inner chamber of sampling tube head body 15, the terminal surface sealing fit of the terminal surface before the terminal surface and the air feed core 10 of sealed head 16, sealed head 16 overcoat is equipped with the interior swivel 17 with first barrel 1 threaded connection, and this interior swivel 17 extrudees on compressing tightly step 161, and this sampling tube head's structure is very reasonable, still has guaranteed good leakproofness under the condition of arbitrary regulation sampling tube head body 15 front end angle.
The other end of the communicating hole 16214 is provided with a threaded hole for connection with the main air intake pipe 41, and the main air intake pipe 41 of the final dust concentration detecting device is communicated with a sampling pump, through which sampling power is supplied.
The first cylinder 1 is detachably connected to the front end of the second cylinder 2, and the detachable mode of the first cylinder 1 is the same as the detachable installation mode of the second cylinder 2 and the outer tube 3. The detachable structure comprises a connecting screw sleeve 5, a compression flange 31 is arranged on the outer tube 3, a threaded connecting section is arranged on the periphery of the rear end part of the second cylinder body 2, the connecting screw sleeve 5 is sleeved on the outer tube 3 and abuts against the compression flange 31, and the connecting screw sleeve 5 is in threaded connection with the threaded connecting section.
The second cylinder body 2 is provided with a connecting block 8, an air inlet channel and an air return channel are arranged on the connecting block 8, one end of the air inlet channel is connected with a flow velocity detection air inlet pipe 9, the other end of the air inlet channel is connected with an air inlet pipe joint 7, one end of the air return channel is connected with a flow velocity detection air return pipe 20, and the other end of the air return channel is connected with an air return pipe joint 19; the flow rate detection air inlet pipe 9 and the flow rate detection air return pipe 20 are positioned outside the second barrel 2, the air return pipe joint 19 and the air inlet pipe joint 7 are positioned inside the second barrel 2, wherein the flow rate detection air inlet pipe 9 and the flow rate detection air return pipe 20 are positioned outside the second barrel 2, the orientation of the flow rate detection air inlet pipe 9 is the same as the orientation of the front end of the sampling pipe head body 15, the orientation of the flow rate detection air return pipe 20 is opposite to the orientation of the flow rate detection air inlet pipe 9, and the air inlet pipe joint 7 and the air return pipe joint 19 are connected in a differential pressure sensor, so that the flow rate is detected through a differential pressure.
The second cylinder 2 is further provided with an insertion hole 183 for inserting a thermocouple, and the second cylinder 2 is provided with an exposure port for exposing the thermocouple conveniently.
As shown in fig. 3 to 5, the outer periphery of the second cylinder 2 is provided with a mounting groove, the extending direction of the mounting groove is perpendicular to the center line of the second cylinder 2, the mounting groove penetrates through the inner hole of the second cylinder 2, a special-shaped block 18 is embedded and fixed in the mounting groove, an embedded part 181 is arranged on the special-shaped block 18, the embedded part 181 extends into the inner hole of the second cylinder 2, the embedded part 181 is provided with an inserting hole 183, and the exposed opening is arranged on the special-shaped block 18 and is communicated with the inserting hole 183.
The special-shaped block 18 comprises mounting portions 182 which are respectively arranged on two sides of the embedded portion 181, the special-shaped block 18 is placed in the mounting groove, the inner side surface 186 of the mounting portion 182 is in plane contact with the groove bottom of the mounting groove, the special-shaped block 18 is fixedly welded with the second cylinder 2, an arc-shaped groove 185 is formed in the outer surface of the special-shaped block 18, and the arc-shaped groove 185 is communicated with the inserting hole 183 to form an exposing port. The inner side 186 of the mounting portion 182 is provided with a stress relief groove 184 at a portion connected to the insertion portion 181.
The above examples are merely illustrative of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and adaptations of the technical solution of the present invention should and are intended to fall within the scope of the present invention as defined in the claims.
Claims (8)
1. The utility model provides a portable dust concentration detection device's rifle head, this rifle head is installed in dust concentration detection device's sampling tube's front end, the sampling tube includes the outer tube and sets up the inlet main pipe in the outer tube, its characterized in that: the gun head comprises a first cylinder body and a second cylinder body, wherein an air supply core body is embedded in the first cylinder body, an annular zero air supply cavity is formed in the air supply core body, a zero air supply connector communicated with the zero air supply cavity is welded on the air supply core body, a communication hole communicated with the zero air supply cavity is formed in the air supply core body, a sampling tube head is detachably arranged at the front end of the first cylinder body, an inner cavity of the sampling tube head is communicated with one end of the communication hole, a threaded hole used for being connected with an air supply main pipeline is formed in the other end of the communication hole, the first cylinder body is detachably connected to the front end of the second cylinder body, a connecting block is arranged on the second cylinder body, an air inlet channel and an air return channel are arranged on the connecting block, one end of the air inlet channel is connected with a flow rate detection air inlet pipe, the other end of the air inlet channel is connected with an air inlet pipe connector, one end of the air return channel is connected with a flow rate detection air return pipe, and the other end of the air return channel is connected with an air return pipe connector; the flow rate detection air inlet pipe and the flow rate detection air return pipe are positioned outside the second barrel, the air return pipe joint and the air inlet pipe joint are positioned inside the second barrel, and the rear end of the first barrel is provided with a detachable structure which is detachably connected with the outer pipe.
2. The gun head of the portable dust concentration detection device according to claim 1, wherein: the periphery of the air supply core body is provided with an annular groove, the groove walls on two sides of the annular groove are in sealing fit with the first cylinder body, a zero air supply cavity is formed between the annular groove and the first cylinder body, the air supply core body is provided with an axial communication hole and a radial communication hole, the axial communication hole is used for communicating the zero air supply cavity with a zero air supply joint, and the radial communication hole is used for communicating the zero air supply cavity with the communication hole.
3. The gun head of the portable dust concentration detection device according to claim 2, wherein: the sampling tube head comprises a sampling tube head body, the front section of the sampling tube head body is bent into an arc shape, the rear end of the sampling tube head body is welded with a sealing head, the periphery of the sealing head is arranged on a compression step, a through hole is formed in the sealing head, the through hole is used for communicating a communication hole with the inner cavity of the sampling tube head body, the rear end face of the sealing head is in sealing fit with the front end face of the air supply core body, an inner threaded sleeve in threaded connection with a first cylinder body is sleeved outside the sealing head, and the inner threaded sleeve is extruded on the compression step.
4. A gun head of a portable dust concentration detection apparatus according to claim 3, wherein: the inside of second barrel still is provided with the cartridge hole that is used for the cartridge thermocouple, be provided with the exposure mouth that makes things convenient for the thermocouple to expose on the second barrel.
5. The gun head of the portable dust concentration detection device according to claim 4, wherein: the mounting groove is formed in the periphery of the second barrel, the extending direction of the mounting groove is perpendicular to the center line of the second barrel, the mounting groove penetrates through the inner hole of the second barrel, a special-shaped block is fixedly embedded in the mounting groove, an embedded portion is arranged on the special-shaped block and extends into the inner hole of the second barrel, the embedded portion is provided with the inserting hole, and the exposed opening is arranged on the special-shaped block and is communicated with the inserting hole.
6. The gun head of the portable dust concentration detection apparatus according to claim 5, wherein: the special-shaped block comprises mounting parts which are respectively arranged on two sides of the embedded part, the special-shaped block is placed in the mounting groove, the inner side surface of the mounting part is in plane contact with the groove bottom of the mounting groove, the special-shaped block is fixedly welded with the second cylinder body, an arc-shaped groove is formed in the outer surface of the special-shaped block, and the arc-shaped groove is communicated with the inserting hole to form an exposing port.
7. The gun head of the portable dust concentration detection apparatus according to claim 6, wherein: the part connected with the embedded part on the inner side surface of the mounting part is provided with a stress release groove.
8. The gun head of the portable dust concentration detection apparatus of claim 7, wherein: the detachable structure comprises a connecting screw sleeve, a compression flange is arranged on the outer tube, a threaded connection section is arranged on the periphery of the rear end part of the second cylinder body, the connecting screw sleeve is sleeved on the outer tube and abuts against the compression flange, and the connecting screw sleeve is in threaded connection with the threaded connection section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010141183.4A CN111089762B (en) | 2020-03-04 | 2020-03-04 | Gun head of portable dust concentration detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010141183.4A CN111089762B (en) | 2020-03-04 | 2020-03-04 | Gun head of portable dust concentration detection device |
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| CN111089762A CN111089762A (en) | 2020-05-01 |
| CN111089762B true CN111089762B (en) | 2024-07-02 |
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| CN212007993U (en) * | 2020-03-04 | 2020-11-24 | 常熟市矿山机电器材有限公司 | Portable dust concentration detection device's rifle head |
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| FR2844463B1 (en) * | 2002-09-17 | 2005-04-22 | Amiflor Fabries | DEVICE MIXING LIQUID FERTILIZER WITH A WATER FLOW FOR INDIVIDUAL |
| CN105067493B (en) * | 2015-09-07 | 2017-09-29 | 常熟市矿山机电器材有限公司 | Flue dust concentration on-line measurement system and measuring apparatus and On-line Measuring Method |
| JP2017194330A (en) * | 2016-04-20 | 2017-10-26 | 日本特殊陶業株式会社 | Gas sensor |
| CN107576601B (en) * | 2017-09-20 | 2023-11-17 | 张家港朗亿机电设备有限公司 | Particle on-line detection and analysis instrument suitable for urban rail transit places |
| CN209132062U (en) * | 2018-12-05 | 2019-07-19 | 张家港朗亿机电设备有限公司 | A kind of smoke particle dust tube |
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| CN212007993U (en) * | 2020-03-04 | 2020-11-24 | 常熟市矿山机电器材有限公司 | Portable dust concentration detection device's rifle head |
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