CN112394138A - Waste gas sampling monitoring devices in mill's environment - Google Patents
Waste gas sampling monitoring devices in mill's environment Download PDFInfo
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- CN112394138A CN112394138A CN202011237841.6A CN202011237841A CN112394138A CN 112394138 A CN112394138 A CN 112394138A CN 202011237841 A CN202011237841 A CN 202011237841A CN 112394138 A CN112394138 A CN 112394138A
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- 239000002912 waste gas Substances 0.000 title claims abstract description 29
- 238000005070 sampling Methods 0.000 title claims abstract description 24
- 238000012806 monitoring device Methods 0.000 title claims description 10
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 238000012544 monitoring process Methods 0.000 claims abstract description 14
- 238000009434 installation Methods 0.000 claims abstract description 10
- 239000007789 gas Substances 0.000 claims description 16
- 239000000523 sample Substances 0.000 claims description 6
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
- G01N33/0063—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display using a threshold to release an alarm or displaying means
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- Chemical & Material Sciences (AREA)
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- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to the technical field of factory environment waste gas sampling monitoring, in particular to a device for sampling and monitoring waste gas in a factory environment, which comprises an installation bottom plate, wherein a first telescopic rod is fixed on the installation bottom plate, the upper end of the first telescopic rod is connected with a waste gas detection module, the waste gas detection module is connected with a first lead, the first lead is connected with a control cabinet, the upper end of the control cabinet is connected with a display screen, the display screen and the control cabinet are both fixed on the lower half section of the first telescopic rod, the control cabinet is also connected with a second lead, the second lead is connected with an alarm flashing lamp, the alarm flashing lamp is fixed on the installation bottom plate on the right side of the first telescopic rod, and the lower ends of four corners of the installation bottom plate. The device has increased the function of going up and down and gyration on the basis of existing equipment, and the application scope of device is wider, has designed the device that turns to that has brake function simultaneously, has effectively solved the problem of slope section practicality.
Description
Technical Field
The invention relates to the technical field of sampling and monitoring of factory environment waste gas, in particular to a device for sampling and monitoring waste gas in a factory environment.
Background
In a factory, exhaust gas sampling and monitoring equipment is used in many places, for example, in places with high requirements on indoor exhaust gas sampling and monitoring, enough exhaust gas sampling and monitoring equipment must be ensured to ensure that the exhaust gas in a production environment is in a controllable range.
The existing waste gas sampling monitoring device does not have a lifting function and a rotating function, and can be careless to cope with the situation that environmental waste gas is complex, and the existing equipment can move but does not have the function of braking and stopping, so that the practicability is poor in the situation that a slope is steep.
Disclosure of Invention
The invention aims to provide a waste gas sampling and monitoring device in a factory environment, which aims to solve the problems that the existing waste gas sampling and monitoring device does not have a lifting function and a rotating function, is not comfortable in the situation of dealing with the complex environment waste gas, does not have the function of braking and stopping although the existing device can move, and is poor in practicability in the situation of steep slopes.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a waste gas sampling monitoring devices in mill's environment, includes mounting plate, the last first telescopic link that is fixed with of mounting plate, first telescopic link upper end is connected with waste gas detection module, waste gas detection module is connected with first wire, first wire is connected with the switch board, the switch board upper end is connected with the display screen, display screen and switch board all are fixed in first telescopic link second section, the switch board still is connected with the second wire, the second wire is connected with warning flashing lamp, warning flashing lamp is fixed in on the mounting plate on first telescopic link right side, the lower extreme in mounting plate four corners is connected with and turns to the device.
As a further scheme of the invention: the waste gas detection module comprises a motor, the motor is fixed on a support at the upper end of the first telescopic rod, the motor is connected with a gear, the gear is meshed with an incomplete gear, the toothless end of the incomplete gear is connected with a long rod, the end of the long rod is connected with a high-precision thermosensitive probe, the long rod is located, the lower end of the incomplete gear is connected with the end of the first telescopic rod in a rotating mode, and the upper end of the incomplete gear is connected with a wind vane.
As a further scheme of the invention: the wind vane comprises a base, a cylindrical boss is fixed at the upper end of the base, a rotary column is connected to the cylindrical boss in a rotating mode, and a wind vane is transversely connected to the upper end of the rotary column.
As a further scheme of the invention: the steering device comprises a main shaft, the main shaft is fixed and penetrates through the mounting bottom plate, a plurality of clamping rings are arranged on the main shaft, the main shaft is located a U-shaped wheel seat is connected between the two clamping rings at the lower end of the main shaft in a rotating mode, the lower end of the U-shaped wheel seat is connected with a wheel, the main shaft is hollow, a brake rod is arranged in the main shaft, the lower end of the brake rod is connected with an arc-shaped brake block, the upper end of the brake rod is connected with a spring, and a manual brake locking structure is arranged above.
As a further scheme of the invention: the hand brake deadlocking structure comprises a first rod, wherein a second rod and a third rod are hinged to two sides of the upper end of the first rod respectively, a fourth rod is hinged to the second rod and connected with a fifth rod, the right end of the fifth rod is connected with the left end of the third rod, and the fifth rod is connected with a T-shaped rod at the lower end.
As a further scheme of the invention: the extension device comprises a base plate, an inclined U-shaped plate is obliquely arranged at the upper end of the base plate, a first support is hinged to the outer portion of the inclined U-shaped plate, a V-shaped plate is hinged to the lower end of the first support, a second support is hinged to the right end of the V-shaped plate, a third support is hinged to the middle of the V-shaped plate, a sectional display screen is arranged at the folding opposite position of the second support and the third support and located at the upper end of the third support, a rotary column is fixedly connected to the upper end of the third support and is connected to the inner side of the U-shaped plate in a rotating.
As a further scheme of the invention: the fixed shaft sleeve is externally connected with a fourth support, the left end of the fourth support is hinged to the U-shaped support, the lower end of the U-shaped support is connected with a second telescopic rod, the second telescopic rod is hinged to an external connecting seat, the external connecting seat is fixed to the side face of the base plate, and the rotary column is installed in an interval on the inner side of the U-shaped plate.
According to the device for sampling and monitoring the waste gas in the factory environment, the lifting and rotating functions are added on the basis of the existing equipment, the application range of the device is wider, and meanwhile, the steering device with the braking function is designed, so that the problem of practicability of a slope section is effectively solved.
Drawings
FIG. 1 is a block diagram of an exhaust sampling and monitoring device in a plant environment according to an embodiment of the present invention;
FIG. 2 is an enlarged view of the structure of FIG. 1 at A;
FIG. 3 is a structural view of the steering apparatus;
FIG. 4 is a cross-sectional view of the extension device;
fig. 5 is an enlarged view of the structure of fig. 1 at B.
In the figure: 1. mounting a bottom plate; 2. a first telescopic rod; 3. an exhaust gas detection module; 301. a motor; 307. a support; 302. a gear; 303. an incomplete gear; 304. a long rod; 305. a high-precision heat-sensitive probe; 306. a wind vane; 3061. a base; 3062. a cylindrical boss; 3063. turning the column; 3064. a weather vane; 4. a first conductive line; 5. a control cabinet; 6. a stretching device; 61. a base plate; 62. an oblique U-shaped plate; 63. a first bracket; 64. a V-shaped plate; 65. a second bracket; 66. a third support; 67. turning the column; 68. fixing the shaft sleeve; 69. a fourth bracket; 610. a U-shaped bracket; 611. a second telescopic rod; 612. an external connecting seat; 613. an interval; 614. a segmented display screen; 7. a second conductive line; 8. an alarm flashing light; 9. a steering device; 901. a main shaft; 902. a snap ring; 903. a U-shaped wheel seat; 904. a wheel; 905. a brake lever; 906. an arc-shaped brake pad; 907. a spring; 908. a manual brake locking structure; 9081. a first lever; 9082. a second lever; 9083. a third lever; 9084. a fourth bar; 9085. a fifth lever; 9086. a T-shaped rod; 9087. an L-shaped rod.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
Example 1:
as shown in fig. 1 and 2, in an embodiment of the present invention, an exhaust gas sampling monitoring device in a factory environment includes an installation base plate 1, a first telescopic rod 2 is fixed on the installation base plate 1, an exhaust gas detection module 3 is connected to an upper end of the first telescopic rod 2, the exhaust gas detection module 3 is connected to a first wire 4, the first wire 4 is connected to a control cabinet 5, an extension device 6 is connected to an upper end of the control cabinet 5, the extension device 6 and the control cabinet 5 are both fixed to a lower half section of the first telescopic rod 2, the control cabinet 5 is further connected to a second wire 7, the second wire 7 is connected to an alarm flashing lamp 8, the alarm flashing lamp 8 is fixed to the installation base plate 1 on the right side of the first telescopic rod 2, and lower ends of four corners of the installation base plate 1 are connected to a steering device 9.
In the embodiment of the invention, the waste gas detection module 3 measures waste gas at a certain position of the environment, data is transmitted to the control cabinet 5 through the first lead 4, the control cabinet 5 displays the waste gas data through the extension device 6, if the set waste gas is exceeded, the control cabinet 5 sends alarm information to the alarm flashing lamp 8 through the second lead 7, the alarm flashing lamp 8 gives an alarm and flashes, the steering device 9 can enable the whole device to move for 360 degrees without limitation, the first telescopic rod 2 stretches and retracts to drive the waste gas detection module 3 to lift, and the height range of waste gas detection is enlarged.
Example 2:
as shown in fig. 1 and 2, in the embodiment of the present invention, the exhaust gas detection module 3 includes a motor 301, the motor 301 is fixed on a bracket 307 at the upper end of the first telescopic rod 2, the motor 301 is connected with a gear 302, the gear 302 is engaged with an incomplete gear 303, the toothless end of the incomplete gear 303 is connected with a long rod 304, the end of the long rod 304 is connected with a high-precision heat sensitive probe 305, the lower end of the incomplete gear 303 is rotatably connected with the end of the first telescopic rod 2, and the upper end of the incomplete gear 303 is connected with a wind vane 306.
In the embodiment of the present invention, the high-precision thermo-sensitive probe 305 generates an electromotive force according to the change of the exhaust gas, and the electromotive force generated current is transmitted to the control cabinet 5 through the first wire 4; the motor 301 rotates to drive the gear 302 and the incomplete gear 303 to rotate, the long rod 304 on the incomplete gear 303 rotates 360 degrees along with the rotation of the incomplete gear 303, and the high-precision thermosensitive probe 305 realizes the detection effect of 360 degrees in the horizontal direction.
Example 3:
as shown in fig. 1 and 2, in the embodiment of the present invention, the vane 306 includes a base 3061, a cylindrical boss 3062 is fixed at an upper end of the base 3061, a rotating column 3063 is rotatably connected to the cylindrical boss 3062, and a vane 3064 is transversely connected to an upper end of the rotating column 3063.
In the embodiment of the present invention, the vane 3064 is changed in orientation by the wind, the cylindrical boss 3062 and the rotating post 3063 rotate relatively, and the vane 3064 rotates the rotating post 3063 by the wind.
Example 4:
as shown in fig. 1, 2 and 3, in the embodiment of the present invention, the steering apparatus 9 includes a main shaft 901, the main shaft 901 is fixed and penetrates through the mounting base plate 1, a plurality of snap rings 902 are disposed on the main shaft 901, a U-shaped wheel seat 903 is rotatably connected between two snap rings 902 disposed at a lower end of the main shaft 901, a wheel 904 is connected to a lower end of the U-shaped wheel seat 903, the main shaft 901 is hollow, a brake lever 905 is disposed in the main shaft 901, an arc-shaped brake pad 906 is connected to a lower end of the brake lever 905, a spring 907 is connected to an upper end of the brake lever 905, and a manual brake locking structure 908 is disposed above the brake lever 905.
In the embodiment of the invention, the U-shaped wheel seat 903 is rotatably connected with the main shaft 901 to realize the function of changing the direction of the wheel 904, the brake rod 905 is pressed downwards, the arc-shaped brake block 906 is abutted against the wheel 904, the wheel 904 stops under the action of friction force, the brake rod 905 is loosened, the brake rod 905 moves upwards under the action of the elastic force of the spring 907, the arc-shaped brake block 906 is separated from the wheel 904, and the device recovers movement.
Example 5:
as shown in fig. 1 to 5, in the embodiment of the present invention, the manual brake locking structure 908 includes a first rod 9081, two sides of an upper end of the first rod 9081 are respectively hinged with a second rod 9082 and a third rod 9083, the second rod 9082 is hinged with a fourth rod 9084, the fourth rod 9084 is connected with a fifth rod 9085, a right end of the fifth rod 9085 is connected with a left end of the third rod 9083, and a T-shaped rod 9086 is connected to a lower end of the fifth rod 9085.
In the embodiment of the invention, the left end of the fifth rod 9085 is pressed downwards, the T-shaped rod 9086 abuts against the brake rod 905 downwards, the fourth rod 9084 and the second rod 9082 rotate downwards, the second rod 9082 is abutted against by the L-shaped rod 9087, and extrusion force exists between the fourth rod 9084 and the second rod 9082, the extrusion force is increased, and the fourth rod 9084 and the second rod 9082 are a pair of rods with elastic contraction, so that the two rods abut against the sixth rod 9088 in a reverse direction after being aligned by zero, and a locking state is completed; similarly, the left end of the fifth rod 9085 is lifted, the second rod 9082 is extruded by the sixth rod 9088, and the fourth rod 9084 and the second rod 9082 rebound to the original state to complete the recovery action.
Example 6:
as shown in fig. 1 to 5, in the embodiment of the present invention, the extending device 6 includes a base plate 61, an inclined U-shaped plate 62 is obliquely disposed on an upper end of the base plate 61, a first support 63 is hinged to an outer portion of the inclined U-shaped plate 62, a V-shaped plate 64 is hinged to a lower end of the first support 63, a second support 65 is hinged to a right end of the V-shaped plate 64, a third support 66 is hinged to a middle portion of the V-shaped plate 64, a sectional display screen 614 is disposed at a folding opposite portion of the second support 65 and the third support 66, a rotating column 67 is fixedly connected to an upper end of the third support 66, the rotating column 67 is rotatably connected to an inner side of the U-shaped plate 62, and a fixing shaft.
In the embodiment of the invention, the stretching device 6 principle: the second telescopic rod 611 is contracted, then the U-shaped bracket 610 pulls the fourth bracket 69 downwards, then the rotating column 67 and the fixed shaft sleeve 68 rotate anticlockwise, then the third bracket 66 rotates anticlockwise, and due to the quadrilateral mechanism formed by the third bracket 66, the V-shaped plate 64, the first bracket 63 and the oblique U-shaped plate 62, the V-shaped plate 64 rotates clockwise at the middle part while the third bracket 66 rotates anticlockwise, and then the second bracket 65 is extended outwards.
Example 7:
as shown in fig. 1 to 5, in the embodiment of the present invention, a fourth bracket 69 is externally connected to the fixed shaft sleeve 68, a left end of the fourth bracket 69 is hinged to a U-shaped bracket 610, a second telescopic rod 611 is connected to a lower end of the U-shaped bracket 610, the second telescopic rod 611 is hinged to an external connecting seat 612, the external connecting seat 612 is fixed to a side surface of the base plate 61, and the rotating column 67 is installed in an area 613 inside the U-shaped plate 62.
In an embodiment of the present invention, the extended second and third brackets 65, 66 are raised to the right and deployed by about 130 degrees, and the segmented display screen 614 also becomes fully deployed for the worker to see.
The embodiment of the invention provides a waste gas sampling and monitoring device in a factory environment, which is added with lifting and rotating functions on the basis of the existing equipment, has wider application range, and is provided with a steering device with a braking function, thereby effectively solving the problem of practicability of a slope section.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make several variations and modifications without departing from the concept of the present invention, and these should be considered as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.
Claims (7)
1. A device for sampling and monitoring waste gas in factory environment comprises an installation bottom plate (1), a first telescopic rod (2) is fixed on the mounting bottom plate (1), the upper end of the first telescopic rod (2) is connected with a waste gas detection module (3), the waste gas detection module (3) is connected with a first lead (4), the first lead (4) is connected with a control cabinet (5), the upper end of the control cabinet (5) is connected with an extension device (6), the extension device (6) and the control cabinet (5) are both fixed on the lower half section of the first telescopic rod (2), the control cabinet (5) is also connected with a second lead (7), the second lead (7) is connected with an alarm flashing lamp (8), the alarm flashing lamp (8) is fixed on the mounting bottom plate (1) at the right side of the first telescopic rod (2), the lower ends of the four corners of the mounting bottom plate (1) are connected with steering devices (9).
2. The device for sampling and monitoring the exhaust gas in the factory environment according to the claim 1, wherein the exhaust gas detection module (3) comprises a motor (301), the motor (301) is fixed on a bracket (307) at the upper end of the first telescopic rod (2), the motor (301) is connected with a gear (302), the gear (302) is meshed with an incomplete gear (303), the toothless end of the incomplete gear (303) is connected with a long rod (304), the end of the long rod (304) is connected with a high-precision thermosensitive probe (305), the lower end of the incomplete gear (303) is rotatably connected with the end of the first telescopic rod (2), and the upper end of the incomplete gear (303) is connected with a wind vane (306).
3. A device for sampling and monitoring exhaust gas in a factory environment according to claim 2, wherein the vane (306) comprises a base (3061), a cylindrical boss (3062) is fixed on the upper end of the base (3061), a rotating column (3063) is rotatably connected to the cylindrical boss (3062), and a vane (3064) is transversely connected to the upper end of the rotating column (3063).
4. The device for sampling and monitoring the exhaust gas in the factory environment according to claim 1, wherein the steering device (9) comprises a main shaft (901), the main shaft (901) is fixed and penetrates through the installation base plate (1), a plurality of clamping rings (902) are arranged on the main shaft (901), a U-shaped wheel seat (903) is rotatably connected between the two clamping rings (902) at the lower end of the main shaft (901), a wheel (904) is connected at the lower end of the U-shaped wheel seat (903), the main shaft (901) is hollow, a brake rod (905) is arranged in the main shaft (901), an arc-shaped brake pad (906) is connected at the lower end of the brake rod (905), a spring (907) is connected at the upper end of the brake rod (905), and a manual brake locking structure (908) is arranged above the brake rod (905).
5. The device for sampling and monitoring the exhaust gas in the factory environment according to claim 4, wherein the manual brake deadlocking structure (908) comprises a first rod (9081), a second rod (9082) and a third rod (9083) are hinged to two sides of the upper end of the first rod (9081), a fourth rod (9084) is hinged to the second rod (9082), the fourth rod (9084) is connected with a fifth rod (9085), the right end of the fifth rod (9085) is connected with the left end of the third rod (9083), and a T-shaped rod (9086) is connected to the lower end of the fifth rod (9085).
6. The sampling and monitoring device for the exhaust gas in the factory environment according to claim 1, the stretching device (6) comprises a base plate (61), an inclined U-shaped plate (62) is obliquely arranged at the upper end of the base plate (61), a first bracket (63) is hinged outside the oblique U-shaped plate (62), a V-shaped plate (64) is hinged at the lower end of the first bracket (63), the right end of the V-shaped plate (64) is hinged with a second bracket (65), the middle part of the V-shaped plate (64) is hinged with a third bracket (66), a sectional display screen (614) is arranged at the folding opposite part of the second bracket (65) and the third bracket (66), a rotary column (67) is fixedly connected at the upper end of the third bracket (66), the rotary column (67) is rotatably connected to the inner side of the U-shaped plate (62), and a fixed shaft sleeve (68) is fixed at one end of the rotary column (67).
7. The device for sampling and monitoring the waste gas in the factory environment according to claim 6, wherein a fourth support (69) is connected outside the fixed shaft sleeve (68), the left end of the fourth support (69) is hinged to a U-shaped support (610), a second telescopic rod (611) is connected to the lower end of the U-shaped support (610), the second telescopic rod (611) is hinged to an external connecting seat (612), the external connecting seat (612) is fixed to the side surface of the base plate (61), and the rotating column (67) is installed in an interval (613) inside the U-shaped plate (62).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011237841.6A CN112394138A (en) | 2020-11-09 | 2020-11-09 | Waste gas sampling monitoring devices in mill's environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011237841.6A CN112394138A (en) | 2020-11-09 | 2020-11-09 | Waste gas sampling monitoring devices in mill's environment |
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| CN112394138A true CN112394138A (en) | 2021-02-23 |
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| CN202011237841.6A Withdrawn CN112394138A (en) | 2020-11-09 | 2020-11-09 | Waste gas sampling monitoring devices in mill's environment |
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| CN (1) | CN112394138A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113551852A (en) * | 2021-07-30 | 2021-10-26 | 深圳华尔升智控技术有限公司 | Full-automatic helium mass spectrometer leak detector with liquid crystal touch color screen display |
| CN114046414A (en) * | 2021-11-25 | 2022-02-15 | 郑州信息科技职业学院 | Building indoor intelligent thermal comfort monitoring device |
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| CN207764188U (en) * | 2018-01-22 | 2018-08-24 | 绿格兰（天津）环保科技有限公司 | One kind being based on intelligent comprehensive environmental factor monitoring device |
| CN208383462U (en) * | 2018-07-16 | 2019-01-15 | 深圳市亚讯威视数字技术有限公司 | A kind of multimedia central informationization control adjustable detection device |
| CN110793578A (en) * | 2019-12-10 | 2020-02-14 | 深圳星华环保科技有限公司 | Environmental dust noise monitoring and early warning device |
| CN212206386U (en) * | 2020-06-30 | 2020-12-22 | 上海工程技术大学 | Ambient temperature detection alarm device |
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| CN113551852A (en) * | 2021-07-30 | 2021-10-26 | 深圳华尔升智控技术有限公司 | Full-automatic helium mass spectrometer leak detector with liquid crystal touch color screen display |
| CN114046414A (en) * | 2021-11-25 | 2022-02-15 | 郑州信息科技职业学院 | Building indoor intelligent thermal comfort monitoring device |
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