CN113418923A - Slurry concentration detection device - Google Patents
Slurry concentration detection device Download PDFInfo
- Publication number
- CN113418923A CN113418923A CN202110671152.4A CN202110671152A CN113418923A CN 113418923 A CN113418923 A CN 113418923A CN 202110671152 A CN202110671152 A CN 202110671152A CN 113418923 A CN113418923 A CN 113418923A
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- female joint
- probe
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- valve core
- male joint
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- 238000001514 detection method Methods 0.000 title claims abstract description 54
- 239000002002 slurry Substances 0.000 title claims abstract description 22
- 239000000523 sample Substances 0.000 claims abstract description 50
- 230000007704 transition Effects 0.000 claims abstract description 39
- 238000007789 sealing Methods 0.000 claims description 7
- 230000003287 optical effect Effects 0.000 claims description 5
- 239000004020 conductor Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 229910052596 spinel Inorganic materials 0.000 claims description 3
- 239000011029 spinel Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 description 8
- 230000006872 improvement Effects 0.000 description 7
- 238000009434 installation Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000002470 thermal conductor Substances 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention provides a slurry concentration detection device which comprises a connecting part and a detection part, wherein the detection part is arranged on the connecting part, the connecting part comprises a transition pipeline, mounting flanges and a male joint assembly, the mounting flanges are arranged at two ends of the transition pipeline, the male joint assembly is arranged at the middle end of the transition pipeline, the male joint assembly is communicated with the transition pipeline, the detection part comprises a female joint assembly and a detection meter which are matched with the male joint assembly, the detection meter is arranged on the female joint assembly, a probe is arranged on the detection meter, and the probe is arranged in the female joint and is inserted into the transition pipeline along with the female joint assembly. The device is convenient for plugging, detaching or overhauling the detector at any time, does not influence the normal conveying of the pipeline, reduces the shutdown loss during overhauling, and improves the working efficiency.
Description
Technical Field
The invention relates to the technical field of detection equipment, in particular to a slurry concentration detection device.
Background
The on-line measuring of thick liquid concentration, in textile sector, paper pulp and papermaking, food industry, chemical industry and biomedical field all receive extensive concern, in the chemical industry, current thick liquid concentration detection device is generally installed detection device on the pipeline of carrying chemical industry thick liquid, need often to shut down when overhauing or changing detection device when needs just can dismantle or overhaul detection device after the thick liquid clearance in the pipeline, cause the degree of difficulty of construction to increase, and work efficiency's reduction, long-time shut down stops production and causes the loss.
Disclosure of Invention
In view of this, the problem to be solved by the present invention is to provide a slurry concentration detection apparatus, which is convenient for the insertion, detachment, and maintenance of a detection meter at any time, does not affect the normal transportation of the pipeline, reduces the shutdown loss during maintenance, and improves the working efficiency.
The invention solves the technical problems by the following technical means: the invention provides a slurry concentration detection device which comprises a connecting part and a detection part, wherein the detection part is arranged on the connecting part, the connecting part comprises a transition pipeline, mounting flanges and a male joint assembly, the mounting flanges are arranged at two ends of the transition pipeline, the male joint assembly is arranged at the middle end of the transition pipeline, the male joint assembly is communicated with the transition pipeline, the detection part comprises a female joint assembly and a detection meter which are matched with the male joint assembly, the detection meter is arranged on the female joint assembly, a probe is arranged on the detection meter, and the probe is arranged in the female joint and is inserted into the transition pipeline along with the female joint assembly.
Further, the male joint subassembly includes shell body and male joint case, the shell body is provided with first through-hole, second inner chamber intercommunication in first through-hole and the transition pipeline, the mobilizable setting in first through-hole of spring is passed through to the one end of male joint case, be provided with the slide on the inner wall of second inner chamber, the slide is parallel with the axis of first through-hole, the mobilizable setting of the one end that first through-hole was kept away from to the male joint case is on the slide, spring one end butt is on the male joint case other end butt on the inner wall of second inner chamber.
Further, a sealing ring is arranged between the male connector valve core and the first through hole, and an external thread is arranged on the outer wall of the outer shell.
Further, the female joint assembly comprises a female joint shell, a female joint body and a female joint valve element, the female joint shell is circumferentially and fixedly arranged at one end of the female joint body in a rotating mode, an internal thread matched with the external thread is arranged on the inner wall of the female joint shell, the female joint valve element is arranged at one end of the female joint body, the diameter of the outer wall, away from one end of the female joint body, of the female joint valve element is matched with the first through hole and can slide in the first through hole, a sealing ring is arranged between the female joint valve element and the first through hole, the detector is arranged on the female joint body, the front end of the probe penetrates through the female joint valve element, a push rod is further arranged at one end, away from the female joint body, of the female joint valve element, the end of the push rod exceeds the end of the probe, and the end of the probe exceeds the end of the female joint shell.
Further, the length of the push rod is smaller than that of the first through hole.
Further, the detector also comprises a body, the probe is arranged on the body, the probe is arranged in a hollow structure and communicated with the body, a prism is arranged at the front end of the probe, a gasket is arranged between the prism and the probe, a light source and a core optical module are arranged in a cavity of the probe, a CCD-camera and a microprocessor which are used for receiving reflected light are arranged in the body, a heat conductor layer is arranged on one side of the body close to the probe and connected with the probe, an air cooling cover is arranged at one end of the body, far away from the probe, and a heat insulation layer is further arranged on the outer surface of the body.
Furthermore, a temperature sensor is further arranged at the position, close to the prism, of the front end of the probe, and the prism is a spinel prism.
Further, the axis of the male joint assembly and the axis of the transition duct form a 45-degree included angle.
According to the technical scheme, the invention has the beneficial effects that: the invention provides a slurry concentration detection device which comprises a connecting part and a detection part, wherein the detection part is arranged on the connecting part, the connecting part comprises a transition pipeline, mounting flanges and a male joint assembly, the mounting flanges are arranged at two ends of the transition pipeline, the male joint assembly is arranged at the middle end of the transition pipeline, the male joint assembly is communicated with the transition pipeline, the detection part comprises a female joint assembly and a detection meter which are matched with the male joint assembly, the detection meter is arranged on the female joint assembly, a probe is arranged on the detection meter, and the probe is arranged in the female joint and is inserted into the transition pipeline along with the female joint assembly. The device is convenient for plugging, detaching or overhauling the detector at any time, does not influence the normal conveying of the pipeline, reduces the shutdown loss during overhauling, and improves the working efficiency.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a perspective view of a slurry concentration detection apparatus according to the present invention;
FIG. 2 is a sectional view showing the state where a female joint of the slurry concentration detecting means according to the present invention is inserted;
FIG. 3 is a sectional view of the slurry concentration detection apparatus according to the present invention with the female joint pulled out;
FIG. 4 is a schematic diagram of a slurry concentration detection apparatus according to the present invention;
reference numerals:
1-a connecting part; 2-a detection section; 11-a transition duct; 12-mounting flange; 13-a male fitting assembly; 21-a female joint assembly; 22-a detector; 221-a probe; 131-an outer shell; 132-male joint spool; 133-a first via; 134-a slide; 135-a spring; 211-female coupling housing; 212-a female fitting body; 213-female fitting spool; 214-a push rod; 221-a body; 222-a prism; 223-a light source; 224-CCD-camera.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
Referring to fig. 1 to 4, the invention provides a slurry concentration detection device, which comprises a connection part 1 and a detection part 2, wherein the detection part 2 is installed on the connection part 1, the connection part 1 comprises a transition pipeline 11, an installation flange 12 and a male joint component 13, the installation flange 12 is arranged at two ends of the transition pipeline 11, the transition pipeline 11 is installed on a slurry conveying pipeline through the installation flange 12, the male joint component 13 is arranged at the middle end of the transition pipeline 11, the male joint component 13 is communicated with the transition pipeline 11, the detection part 2 comprises a female joint component 21 and a detection meter 22 which are matched with the male joint component 13, the detection meter 22 is arranged on the female joint component 21, a probe 221 is arranged on the detection meter 22, and the probe 221 is arranged in the female joint and inserted into the transition pipeline 11 along with the female joint component 21. Will make through male joint subassembly 13 and female joint subassembly 21 and detect meter 22 and connecting portion 1 separation and connection for can be convenient dismantle and overhaul and can not influence the transport of thick liquid pipeline to the thick liquid to detecting meter 22, the loss of shutting down when reducing the maintenance improves work efficiency.
As a further improvement to the above technical solution, the male joint assembly 13 includes an outer housing 131 and a male joint valve core 132, the outer housing 131 is provided with a first through hole 133, the first through hole 133 is communicated with a second inner cavity in the transition pipe 11, one end of the male joint valve core 132 is movably disposed in the first through hole 133 through a spring 135, an inner wall of the second inner cavity is provided with a slide 134, the slide 134 is parallel to an axis of the first through hole 133, one end of the male joint valve core 132, which is far away from the first through hole 133, is movably disposed on the slide 134, and one end of the spring 135 abuts against the male joint valve core 132 and the other end abuts against an inner wall of the second inner cavity. The first through hole 133 is provided to communicate with the transition duct 11, the second through hole is closed by the male joint spool 132, the first through hole 133 is opened and closed by the male joint spool 132 sliding in the second inner cavity of the transition duct 11 and by the elastic force of the spring 135.
As a further improvement to the above technical solution, a sealing ring is disposed between the male connector valve element 132 and the first through hole 133, and an external thread is disposed on an outer wall of the outer housing 131. The seal ring is provided to seal the space between the male joint spool 132 and the first through hole 133, thereby preventing the outflow of the slurry. While the female connector is mounted through the external thread on the outer wall of the outer housing 131.
As a further improvement to the above technical solution, the female joint assembly 21 includes a female joint housing 211, a female joint body 221212 and a female joint valve core 213, the female joint housing 211 is circumferentially and fixedly disposed at one end of the female joint body 221212, an inner wall of the female joint housing 211 is provided with an internal thread matching with the external thread, the female joint valve core 213 is disposed at one end of the female joint body 221212, an outer wall diameter of one end of the female joint valve core 213 away from the female joint body 221212 matches with the first through hole 133 and can slide in the first through hole 133, a sealing ring is disposed between the female joint valve core 213 and the first through hole 133, the detector 22 is disposed on the female joint body 221212, a front end of the probe 221 penetrates through the female joint valve core 213, one end of the female joint valve core 213 away from the female joint body 221212 is further provided with a push rod 214, and an end of the push rod 214 exceeds an end of the probe 221, the end of the probe 221 protrudes beyond the end of the female housing 211. And a sealing ring is arranged between the probe and the female joint valve core to prevent liquid leakage.
As a further improvement to the above technical solution, the length of the push rod 214 is smaller than the length of the first through hole 133. During the process of inserting the female joint valve core 213 into the first through hole 133, the female joint valve core 213 is firstly inserted into the first through hole 133 to close the first through hole 133 and is gradually screwed through the housing, the male joint is pushed into the inner cavity of the transition pipeline 11 through the push rod 214 during the process of continuing the insertion, and the front end of the probe 221 is inserted into the transition pipeline 11 to measure the concentration. While the diameter of the first through-hole 133 is set to 1/4 smaller than the diameter or side length of the transition duct 11. So that the male fitting spool 132 will not interfere with the flow of fluid through the conduit after being pushed into the interior of the transition conduit 11. During the process of pulling out the female joint valve element 213, the male joint valve element 132 firstly enters the first through hole 133 under the action of the spring 135 to close the first through hole 133, and then the female joint valve element 213 is pulled out.
As a further improvement of the above technical solution, the detector 22 further includes a body 221, the probe 221 is disposed on the body 221, the probe 221 is disposed in a hollow structure and is communicated with the body 221, the front end of the probe 221 is provided with a prism 222, a gasket is disposed between the prism 222 and the probe 221, a light source 223 and a core optical module are disposed in a cavity of the probe 221, a CCD-camera and a microprocessor for receiving reflected light are disposed inside the body 221, a thermal conductor layer is disposed on a side of the body 221 close to the probe 221, the thermal conductor layer is connected with the probe 221, an air cooling cover is disposed on a side of the body 221 far from the probe 221, and a thermal insulation layer is further disposed on an outer surface of the body 221. The light emitted from the light source 223 is irradiated onto the interface between the prism 222 and the solution to be measured at different angles, some of the light is totally reflected and some of the light is partially reflected and most of the refracted light enters the measurement solution, thereby generating an optical image consisting of a bright area and a dark area, the incident angle corresponding to the boundary between the dark area and the bright area is called a "critical angle" which is a function of the refractive index, and the solution concentration is proportional to the refractive index, so that the solution concentration is measured at the critical angle. The digital CCD camera is used for detecting the optical image and the position of the bright-dark boundary line, the image information is converted into electric signals point by point, and the exact position of the shadow line is measured, so that the refractive index is measured. A temperature sensor is arranged in the probe 221 to measure the temperature of the medium at the interface, and the transmitter calculates and displays the liquid concentration at the temperature according to the obtained refractive index and the temperature.
As a further improvement to the above technical solution, a temperature sensor is further disposed at a position close to the prism 222 at the front end of the probe 221, and the prism 222 is a spinel prism 222. As a further improvement to the above solution, the axis of the male joint assembly 13 is at an angle of 45 degrees to the axis of the transition duct 11.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (8)
1. A slurry concentration detection device is characterized in that: including connecting portion (1) and detection portion (2), install on connecting portion (1) detection portion (2), connecting portion (1) are including transition pipeline (11), mounting flange (12) and male joint subassembly (13), mounting flange (12) set up at transition pipeline (11) both ends, male joint subassembly (13) set up at transition pipeline (11) middle-end, male joint subassembly (13) and transition pipeline (11) intercommunication, detection portion (2) include with male joint subassembly (13) assorted female joint subassembly (21) and detect meter (22), detect meter (22) and set up on female joint subassembly (21), be provided with probe (221) on detecting meter (22), probe (221) set up in the female joint follow female joint subassembly (21) and insert in transition pipeline (11).
2. The slurry concentration detection apparatus according to claim 1, characterized in that: the male joint assembly (13) comprises an outer shell (131) and a male joint valve core (132), wherein a first through hole (133) is formed in the outer shell (131), the first through hole (133) is communicated with a second inner cavity in the transition pipeline (11), one end of the male joint valve core (132) is movably arranged in the first through hole (133) through a spring (135), a slide way (134) is arranged on the inner wall of the second inner cavity, the slide way (134) is parallel to the axis of the first through hole (133), one end, far away from the first through hole (133), of the male joint valve core (132) is movably arranged on the slide way (134), one end of the spring (135) is abutted to the male joint valve core (132), and the other end of the spring (135) is abutted to the inner wall of the second inner cavity.
3. The slurry concentration detection apparatus according to claim 2, characterized in that: a sealing ring is arranged between the male joint valve core (132) and the first through hole (133), and an external thread is arranged on the outer wall of the outer shell (131).
4. The slurry concentration detection apparatus according to claim 3, characterized in that: the female joint assembly (21) comprises a female joint shell (211), a female joint body (221) (212) and a female joint valve core (213), the female joint shell (211) is circumferentially and fixedly arranged at one end of the female joint body (221) (212) in a rotating mode, an internal thread matched with the external thread is arranged on the inner wall of the female joint shell (211), the female joint valve core (213) is arranged at one end of the female joint body (221) (212), the diameter of the outer wall of one end, far away from the female joint body (221) (212), of the female joint valve core (213) is matched with the first through hole (133) and can slide in the first through hole (133), a sealing ring is arranged between the female joint valve core (213) and the first through hole (133), the detection meter (22) is arranged on the female joint body (221) (212), and the front end of the probe (221) penetrates through the female joint valve core (213), and a push rod (214) is further arranged at one end, away from the female joint body (221) (212), of the female joint valve core (213), the end part of the push rod (214) exceeds the end part of the probe (221), and the end part of the probe (221) exceeds the end part of the female joint shell (211).
5. The slurry concentration detection apparatus according to claim 4, characterized in that: the length of the push rod (214) is smaller than that of the first through hole (133).
6. The slurry concentration detection apparatus according to claim 1, characterized in that: the detector (22) further comprises a body (221), the probe (221) is arranged on the body (221), the probe (221) is arranged to be of a hollow structure and communicated with the body (221), a prism (222) is arranged at the front end of the probe (221), a gasket is arranged between the prism (222) and the probe (221), a light source (223) and a core optical module are arranged in a cavity of the probe (221), a CCD-camera and a microprocessor which are used for receiving reflected light are arranged inside the body (221), a heat conductor layer is arranged on one side, close to the probe (221), of the body (221), the heat conductor layer is connected with the probe (221), an air cooling cover is arranged at one end, far away from the probe (221), of the body (221), and a heat insulation layer is further arranged on the outer surface of the body (221).
7. The slurry concentration detection apparatus according to claim 1, characterized in that: the front end of the probe (221) is also provided with a temperature sensor at a position close to the prism (222), and the prism (222) is a spinel prism (222).
8. The slurry concentration detection apparatus according to claim 1, characterized in that: and the axis of the male joint assembly (13) and the axis of the transition pipeline (11) form a 45-degree included angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110671152.4A CN113418923A (en) | 2021-06-17 | 2021-06-17 | Slurry concentration detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110671152.4A CN113418923A (en) | 2021-06-17 | 2021-06-17 | Slurry concentration detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113418923A true CN113418923A (en) | 2021-09-21 |
Family
ID=77788795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110671152.4A Pending CN113418923A (en) | 2021-06-17 | 2021-06-17 | Slurry concentration detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113418923A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2091456U (en) * | 1991-06-14 | 1991-12-25 | 北京轻工业学院 | High-temp. liquid concentration on-line detecting device |
| JPH0469489A (en) * | 1990-07-10 | 1992-03-04 | Mitsubishi Kasei Corp | Device for joining transport pipe |
| CN105021570A (en) * | 2015-07-15 | 2015-11-04 | 中山市三易测量仪器有限公司 | Liquid concentration detection device |
| CN206638353U (en) * | 2017-03-22 | 2017-11-14 | 浙江伟星新型建材股份有限公司 | The auxiliary connecting pipe of water temperature in a kind of measurement plastic conduit |
| CN108561746A (en) * | 2018-04-24 | 2018-09-21 | 中车长江车辆有限公司 | Vacuum measuring device and cryogenic liquid storing and transporting system |
| CN109595414A (en) * | 2019-01-24 | 2019-04-09 | 新乡市普敏姆液压配件有限公司 | Male contact and quick coupling |
| CN110333187A (en) * | 2019-07-25 | 2019-10-15 | 四川维思达光学技术有限公司 | A kind of detection spoon measuring strength of fluid |
| CN110398476A (en) * | 2019-07-25 | 2019-11-01 | 四川维思达光学技术有限公司 | The optical system and its measurement method that pen type for measuring refractive indexes of liquid is laid out |
| CN211719507U (en) * | 2020-04-29 | 2020-10-20 | 上海乐研电气有限公司 | Gas density relay and monitoring devices of full life intelligent monitoring |
| CN212746022U (en) * | 2020-07-24 | 2021-03-19 | 上海朝辉压力仪器有限公司 | Multi-parameter metering device for water content and flow |
-
2021
- 2021-06-17 CN CN202110671152.4A patent/CN113418923A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0469489A (en) * | 1990-07-10 | 1992-03-04 | Mitsubishi Kasei Corp | Device for joining transport pipe |
| CN2091456U (en) * | 1991-06-14 | 1991-12-25 | 北京轻工业学院 | High-temp. liquid concentration on-line detecting device |
| CN105021570A (en) * | 2015-07-15 | 2015-11-04 | 中山市三易测量仪器有限公司 | Liquid concentration detection device |
| CN206638353U (en) * | 2017-03-22 | 2017-11-14 | 浙江伟星新型建材股份有限公司 | The auxiliary connecting pipe of water temperature in a kind of measurement plastic conduit |
| CN108561746A (en) * | 2018-04-24 | 2018-09-21 | 中车长江车辆有限公司 | Vacuum measuring device and cryogenic liquid storing and transporting system |
| CN109595414A (en) * | 2019-01-24 | 2019-04-09 | 新乡市普敏姆液压配件有限公司 | Male contact and quick coupling |
| CN110333187A (en) * | 2019-07-25 | 2019-10-15 | 四川维思达光学技术有限公司 | A kind of detection spoon measuring strength of fluid |
| CN110398476A (en) * | 2019-07-25 | 2019-11-01 | 四川维思达光学技术有限公司 | The optical system and its measurement method that pen type for measuring refractive indexes of liquid is laid out |
| CN211719507U (en) * | 2020-04-29 | 2020-10-20 | 上海乐研电气有限公司 | Gas density relay and monitoring devices of full life intelligent monitoring |
| CN212746022U (en) * | 2020-07-24 | 2021-03-19 | 上海朝辉压力仪器有限公司 | Multi-parameter metering device for water content and flow |
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