CN117269419A - Gas instrument calibrating device - Google Patents

Gas instrument calibrating device Download PDF

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Publication number
CN117269419A
CN117269419A CN202311002195.9A CN202311002195A CN117269419A CN 117269419 A CN117269419 A CN 117269419A CN 202311002195 A CN202311002195 A CN 202311002195A CN 117269419 A CN117269419 A CN 117269419A
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CN
China
Prior art keywords
fixedly connected
ring
right front
circular
post
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311002195.9A
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Chinese (zh)
Inventor
蔡福明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ma'anshan Fuming Instrument Manufacturing Co ltd
Original Assignee
Ma'anshan Fuming Instrument Manufacturing Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ma'anshan Fuming Instrument Manufacturing Co ltd filed Critical Ma'anshan Fuming Instrument Manufacturing Co ltd
Priority to CN202311002195.9A priority Critical patent/CN117269419A/en
Publication of CN117269419A publication Critical patent/CN117269419A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004Gaseous mixtures, e.g. polluted air
    • G01N33/0009General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/007Arrangements to check the analyser
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004Gaseous mixtures, e.g. polluted air
    • G01N33/0006Calibrating gas analysers
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004Gaseous mixtures, e.g. polluted air
    • G01N33/0009General constructional details of gas analysers, e.g. portable test equipment

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measuring Volume Flow (AREA)

Abstract

The invention discloses a gas instrument calibrating device, which relates to the technical field of gas instrument calibrating devices and comprises a circular table ring, wherein a top supporting plate is fixedly connected to the outer part of the circular table ring, and a bottom rectangular box is fixedly connected to the bottom of the top supporting plate.

Description

Gas instrument calibrating device
Technical Field
The invention relates to the technical field of gas instrument calibrating devices, in particular to a gas instrument calibrating device.
Background
The instrument for detecting various data of gas is called as a gas instrument, in the existing experimental process, a gas flow standard device adopting a sonic venturi nozzle as a standard meter is used for detecting the gas instrument, so that the stable use and accuracy of the gas instrument can be ensured, the gas instrument needs to be fixed when the gas instrument is detected, in the fixing process, a detection table for placing a flowmeter to be detected is needed, the detection table is at least sequentially connected with a stagnation container, the sonic nozzle, a negative pressure pipeline and a Roots vacuum pump adopting variable frequency control, an exhaust port of the vacuum pump is communicated with the detection chamber through an underground pipeline, certain defects exist in the existing detection device when the gas instrument is detected, the instrument is placed on the detection table to be fixed, but the instrument is easy to shake when the gas instrument is directly placed on the detection table, in the use process, different detection devices are needed for the gas instrument with different sizes, and the use efficiency is low.
Disclosure of Invention
The invention provides a gas instrument calibrating device, which solves the technical problem of the gas instrument calibrating device.
In order to solve the technical problems, the invention provides a gas instrument calibrating device, which comprises a round platform ring, wherein a top support plate is fixedly connected to the outer part of the round platform ring, a bottom rectangular box is fixedly connected to the bottom of the top support plate, a middle round hole is formed in the middle of the top support plate, a middle connecting pipe is fixedly connected to the bottom of the middle of the round platform ring, a top round cover is fixedly connected to the top of the middle connecting pipe, a left limit plate is fixedly connected to one side of the top round cover, a right limit plate is fixedly connected to the other side of the top round cover, a movable outer ring is movably connected to the outer part of the inner rotating ring, a left rear column is fixedly connected to one side of the rear part of the top support plate, a right rear column is fixedly connected to the other side of the rear part of the top support plate, a left front column is fixedly connected to the other side of the front part of the top support plate, the side fixedly connected with left back link at left back stand middle part, the side fixedly connected with right back link at right back stand middle part, the side fixedly connected with left front link at left front stand middle part, the side fixedly connected with right front link at right front stand middle part, the middle part fixedly connected with left back horizontal pole at left back link, the middle part fixedly connected with right back horizontal pole at right back link, the middle part fixedly connected with left front horizontal pole at left front link, the middle part fixedly connected with right front horizontal pole at right front link, the tip fixedly connected with left back spring at left back horizontal pole, the tip fixedly connected with left back gag lever post of left back spring, the tip fixedly connected with left front spring of left front horizontal pole, the tip fixedly connected with left front gag lever post of left front spring, the end part fixedly connected with right back spring of right back horizontal pole, the end part fixedly connected with right back gag lever post of right back spring, the end part fixedly connected with right front spring of right front horizontal pole, the end part fixedly connected with right front gag lever post of right front spring, the bottom fixedly connected with left back pull rod of left back gag lever post, the bottom fixedly connected with right back pull rod of right back gag lever post, the bottom fixedly connected with left front pull rod of left front gag lever post, the bottom fixedly connected with right front pull rod of right front gag lever post, the bottom fixedly connected with movable outer loop of left back pull rod and right back pull rod, the bottom fixedly connected with movable outer loop of left front pull rod and right front pull rod.
Preferably, the movable outer ring is matched with the middle connecting pipe, the movable outer ring is in a circular ring structure, and the inner rotary ring is matched with the circular truncated cone ring.
Preferably, the structure of well connecting pipe is the pipe, well connecting pipe rotates along with the rotating ring, left limiting plate and right limiting plate are located the both sides at top dome top.
Preferably, the structure of the bottom rectangular box is a rectangular box, the round table ring is matched with the round hole in the middle, the left front upright post and the left rear upright post are positioned on one side of the top supporting plate, and the right front upright post and the right rear upright post are positioned on the other side of the top supporting plate.
Preferably, the round table ring is in a hollow round table structure, and the inner rotating ring rotates in the middle of the round table ring.
Preferably, the left rear pull rod and the left front pull rod are positioned at two ends of the left limiting plate, and the right rear pull rod and the right front pull rod are positioned at two ends of the right limiting plate.
Preferably, the inner surface of the circular truncated cone ring is provided with threads, the outer surface of the inner rotating ring is provided with threads, and the inner rotating ring moves up and down in the middle of the circular truncated cone ring.
Compared with the related art, the gas instrument calibrating device provided by the invention has the following beneficial effects:
the invention provides a gas meter calibrating device, which is characterized in that a left front upright post and a left rear upright post are fixedly connected to one side of the top of a top supporting plate, a right front upright post and a right rear upright post are fixedly connected to the other side of the top supporting plate, a left rear connecting frame is fixedly connected to the top of the left rear upright post, a right rear connecting frame is fixedly connected to the top of the left front upright post, a right front connecting frame is fixedly connected to the top of the right front upright post, a spring is fixedly connected to the middle parts of the left front connecting frame and the right front connecting frame, a left rear limit rod and a right rear limit rod are respectively fixedly connected to the ends of the spring, a left rear limit rod and a right front limit rod are fixedly connected to the bottoms of the left rear limit rod and the right rear limit rod, a left front pull rod and a right rear pull rod are fixedly connected to the bottoms of the left front limit rod and the right front limit rod, a left front pull rod and the right rear pull rod are fixedly connected to the bottoms of the left front limit rod and the right front limit rod, a right front ring is movably connected to the bottoms of the right front upright post and the right front upright post, a rotary table is rotatably connected to the left front limit rod and the right front limit rod is rotatably connected to the inside of a meter, the meter is rotatably connected to the left front limit rod and the meter is rotatably, and the meter is rotatably connected to the inside the meter is rotatably and the meter.
The invention provides a gas instrument calibrating device, which is characterized in that a left rear pull rod is fixedly connected to the bottom of a left rear limit rod, a right rear pull rod is fixedly connected to the bottom of a right rear limit rod, a left front pull rod is fixedly connected to the bottom of a left front limit rod, and a right front pull rod is fixedly connected to the bottom of a right front limit rod.
The invention provides a gas instrument calibrating device, which is characterized in that a left rear pull rod is fixedly connected to the bottom of a left rear limit rod, a right rear pull rod is fixedly connected to the bottom of a right rear limit rod, a left front pull rod is fixedly connected to the bottom of a left front limit rod, a right front pull rod is fixedly connected to the bottom of a right front limit rod, when the gas instrument calibrating device is used, the gas instrument is arranged in the middle of a left limit plate and the middle of a right limit plate, and then the movable outer ring moves downwards by rotating an inner rotating ring, so that the gas instrument is extruded, the instrument is fixed, and the arrangement of an elastic extruding device is suitable for more gas instruments with different sizes in the use process, so that the use range of the calibrating device is improved, and the use efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the overall explosive structure of the present invention;
FIG. 3 is a schematic view of the structure of the bottom rectangular box of the present invention;
FIG. 4 is a schematic view of the structure of the left rear stop lever of the present invention;
FIG. 5 is a schematic view of the structure of the left front tie rod of the present invention;
fig. 6 is a schematic view of the structure of the middle connecting pipe of the present invention.
Reference numerals in the drawings: 1. a circular truncated cone ring; 2. a right front pillar; 3. a left front upright; 4. a left rear pillar; 5. a right rear pillar; 6. a top support plate; 7. a bottom rectangular box; 8. a left rear connecting frame; 9. a right rear connecting frame; 10. a left front connecting frame; 11. a right front connecting frame; 12. a middle round hole; 13. a left rear cross bar; 14. a left front cross bar; 15. a right rear cross bar; 16. a right front rail; 17. an inner rotating ring; 18. a middle connecting pipe; 19. a right limiting plate; 20. a left limiting plate; 21. a left rear spring; 22. a right rear spring; 23. a left front spring; 24. a right front spring; 25. a left rear limit rod; 26. a right rear limit rod; 27. a left front limit rod; 28. a right front limit rod; 29. a left rear pull rod; 30. a left front pull rod; 31. a right rear tie rod; 32. a right front pull rod; 33. a movable outer ring; 34. and (5) a top dome.
Detailed Description
The embodiments of the present invention will be described more fully with reference to the accompanying drawings, and the configurations of the structures described in the following embodiments are merely examples, and the gas meter verification device according to the present invention is not limited to the configurations described in the following embodiments, but all other embodiments obtained by a person skilled in the art without any inventive effort are within the scope of the present invention.
Referring to fig. 1-6, the invention provides a gas instrument calibrating device, which comprises a round table ring 1, a top support plate 6 is fixedly connected to the outside of the round table ring 1, a bottom rectangular box 7 is fixedly connected to the bottom of the top support plate 6, a middle round hole 12 is formed in the middle of the top support plate 6, an inner rotating ring 17 is movably connected to the middle of the round table ring 1, a middle connecting pipe 18 is fixedly connected to the bottom of the middle of the round table ring 1, a top round cover 34 is fixedly connected to the top of the middle connecting pipe 18, a left limiting plate 20 is fixedly connected to one side of the top round cover 34, a right limiting plate 19 is fixedly connected to the other side of the top round cover 34, a movable outer ring 33 is movably connected to the outside of the inner rotating ring 17, a left rear column 4 is fixedly connected to one side of the rear of the top support plate 6, a right rear column 5 is fixedly connected to one side of the rear of the top support plate 6, a left front column 3 is fixedly connected to one side of the front of the top support plate 6, the other side of the front part of the top supporting plate 6 is fixedly connected with a right front upright post 2, the side surface of the middle part of a left rear upright post 4 is fixedly connected with a left rear connecting frame 8, the side surface of the middle part of a right rear upright post 5 is fixedly connected with a right rear connecting frame 9, the side surface of the middle part of a left front upright post 3 is fixedly connected with a left front connecting frame 10, the side surface of the middle part of the right front upright post 2 is fixedly connected with a right front connecting frame 11, the middle part of the left rear connecting frame 8 is fixedly connected with a left rear cross rod 13, the middle part of the right rear connecting frame 9 is fixedly connected with a right rear cross rod 15, the middle part of the left front connecting frame 10 is fixedly connected with a left front cross rod 14, the end part of the left rear cross rod 13 is fixedly connected with a left rear spring 21, the end part of the left rear spring 21 is fixedly connected with a left rear limit rod 25, the end part of the left front cross rod 14 is fixedly connected with a left front spring 23, the end part of the left front spring 23 is fixedly connected with a left front limit rod 27, the end part of the right rear cross rod 15 is fixedly connected with a right rear spring 22, the end part of the right rear spring 22 is fixedly connected with a right rear limit rod 26, the end part of the right front cross rod 16 is fixedly connected with a right front spring 24, the end part of the right front spring 24 is fixedly connected with a right front limit rod 28, the bottom of the left rear limit rod 25 is fixedly connected with a left rear pull rod 29, the bottom of the right rear limit rod 26 is fixedly connected with a right rear pull rod 31, the bottom of the left front limit rod 27 is fixedly connected with a left front pull rod 30, the bottom of the right front limit rod 28 is fixedly connected with a right front pull rod 32, the bottom of the left rear pull rod 29 and the right rear pull rod 31 is fixedly connected with a movable outer ring 33, and the bottom of the left front pull rod 30 and the right front pull rod 32 is fixedly connected with a movable outer ring 33.
Referring to fig. 6, the movable outer ring 33 is adapted to the middle connection pipe 18, the movable outer ring 33 has a circular ring structure, and the inner rotary ring 17 is adapted to the inside of the circular truncated cone ring 1.
Referring to fig. 4, the middle connection pipe 18 is configured as a circular pipe, the middle connection pipe 18 rotates along with the inner rotating ring 17, and the left and right limiting plates 20 and 19 are positioned at both sides of the top dome 34.
Referring to fig. 1-3, the bottom rectangular box 7 is a rectangular box, the round table ring 1 is matched with the middle round hole 12, the left front upright 3 and the left rear upright 4 are positioned on one side of the top support plate 6, and the right front upright 2 and the right rear upright 5 are positioned on the other side of the top support plate 6.
Referring to fig. 4, the circular truncated cone ring 1 has a hollow circular truncated cone structure, and the inner rotating ring 17 rotates in the middle of the circular truncated cone ring 1.
Referring to fig. 5, a left rear link 29 and a left front link 30 are located at both ends of the left limiting plate 20, and a right rear link 31 and a right front link 32 are located at both ends of the right limiting plate 19.
Referring to fig. 6, the inner surface of the circular truncated cone ring 1 is threaded, the outer surface of the inner rotating ring 17 is threaded, and the inner rotating ring 17 moves up and down in the middle of the circular truncated cone ring 1.
The working principle of the invention is as follows: the left front upright 3 and the left rear upright 4 are fixedly connected to one side of the top supporting plate 6, the right front upright 2 and the right rear upright 5 are fixedly connected to the other side of the top supporting plate 6, the left rear connecting frame 8 is fixedly connected to the top of the left rear upright 4, the right rear connecting frame 9 is fixedly connected to the top of the right rear upright 5, the left front connecting frame 10 is fixedly connected to the top of the left front upright 3, the right front connecting frame 11 is fixedly connected to the top of the right front upright 2, the left rear connecting frame 8 and the right rear connecting frame 9, the middle parts of the left front connecting frame 10 and the right front connecting frame 11 are fixedly connected with springs, the left rear limiting rod 25 and the right rear limiting rod 26 are fixedly connected to the ends of the springs respectively, the left front limiting rod 27 and the right front limiting rod 28, the left rear pull rod 29 and the right rear pull rod 31 are fixedly connected to the bottoms of the left rear limiting rod 25 and the right rear limiting rod 26, the bottom of the left front limit rod 27 and the right front limit rod 28 is fixedly connected with a left front pull rod 30 and a right front pull rod 32, the bottom of the left rear pull rod 29 and the right rear pull rod 31, the bottom of the left front pull rod 30 and the right front pull rod 32 is fixedly connected with a movable outer ring 33, the bottom of the middle connecting pipe 18 is fixedly connected with a round table ring 1, the outer side of the top of the inner rotating ring 17 is fixedly connected with the movable outer ring 33, the inner rotating ring 17 can rotate in the round table ring 1, the height of the movable outer ring 33 changes along with the rotation of the inner rotating ring 17, the height of the left rear limit rod 25 and the right rear limit rod 26, the left front limit rod 27 and the right front limit rod 28 changes, the ends of the left rear limit rod 25 and the right rear limit rod 26 press the gas meter, the gas meter is fixed, the gas meter is convenient to use, the bottom fixedly connected with left back pull rod 29 at left back gag lever post 25, the bottom fixedly connected with right back pull rod 31 at right back gag lever post 26, the bottom fixedly connected with left front pull rod 30 at left front gag lever post 27, the bottom fixedly connected with right front pull rod 32 at right front gag lever post 28, in the use, because press device is elastic structure, make in the use, avoid causing the injury to the gas instrument, can not leave the trace on the surface, make the gas instrument that is examined and tested intact, the bottom fixedly connected with left back pull rod 29 at left back gag lever post 25, the bottom fixedly connected with right back pull rod 31 at right back gag lever post 26, the bottom fixedly connected with left front pull rod 30 at left front gag lever post 27, the bottom fixedly connected with right front pull rod 32 at right front gag lever post 28, in the middle part of left gag lever post 20 and right gag lever post 19 when using, then through rotating the inner rotating ring 17, make the movable outer ring 33 move down, make the gas instrument receive the extrusion like this, make the instrument be fixed, make the elastic device set up, make the gas instrument be more applicable to the improvement in the use of the device, the use of the device is more than can be used in the same.
The last points to be described are: first, in the description of the present application, it should be noted that, unless otherwise specified and defined, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be mechanical or electrical, or may be a direct connection between two elements, and "upper," "lower," "left," "right," etc. are merely used to indicate relative positional relationships, which may be changed when the absolute position of the object being described is changed;
secondly: in the drawings of the disclosed embodiments, only the structures related to the embodiments of the present disclosure are referred to, and other structures can refer to the common design, so that the same embodiment and different embodiments of the present disclosure can be combined with each other under the condition of no conflict;
finally: the foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims (7)

1. The utility model provides a gas instrument calibrating device, includes round platform ring (1), its characterized in that: the outside fixedly connected with top backup pad (6) of round platform ring (1), the bottom fixedly connected with bottom rectangle box (7) of top backup pad (6), middle part round hole (12) have been seted up at the middle part of top backup pad (6), one side fixedly connected with left back post (4) at top backup pad (6) rear portion, opposite side fixedly connected with right back post (5) at top backup pad (6) rear portion, one side fixedly connected with left front post (3) at top backup pad (6) front portion, the opposite side fixedly connected with right front post (2) at top backup pad (6) front portion, the side fixedly connected with left back link (8) at left back post (4) middle part, the side fixedly connected with right back link (9) at right back post (5) middle part, the side fixedly connected with left front link (10) at left front post (3) middle part, the middle part fixedly connected with left back link (8) at right front side, the left back link (13) at right front cross bar (15) at right front side fixedly connected with right cross bar (14) at right front side of front side link (2), the utility model provides a left back spring (21) of tip fixedly connected with of left back horizontal pole (13), the tip fixedly connected with of left back spring (21) is left back gag lever post (25), tip fixedly connected with of left back horizontal pole (14) is left front spring (23), tip fixedly connected with of left front spring (23) is left front gag lever post (27), tip fixedly connected with of right back horizontal pole (15) is right back spring (22), tip fixedly connected with of right back spring (22) is right back gag lever post (26), tip fixedly connected with of right front horizontal pole (16) is right front spring (24), tip fixedly connected with of right front spring (24) is right front gag lever post (28), the bottom fixedly connected with of left back gag lever post (25) is left back gag lever post (29), the bottom fixedly connected with of left front gag lever post (26) is left front pull rod (30), the bottom fixedly connected with of right front limit lever post (28) is right front pull rod (32) and outer loop (33), the bottom fixedly connected with of left front pull rod (33) and right outer loop (33).
2. The gas instrument verification device according to claim 1, wherein the movable outer ring (33) is matched with the middle connecting pipe (18), the movable outer ring (33) is in a circular ring structure, the middle part of the circular table ring (1) is movably connected with an inner rotating ring (17), the inner rotating ring (17) is matched with the inner part of the circular table ring (1), the middle connecting pipe (18) is fixedly connected with the bottom of the middle part of the circular table ring (1), the top of the middle connecting pipe (18) is fixedly connected with a top circular cover (34), one side of the top circular cover (34) is fixedly connected with a left limiting plate (20), the other side of the top circular cover (34) is fixedly connected with a right limiting plate (19), and the outer part of the inner rotating ring (17) is movably connected with the movable outer ring (33).
3. A gas meter calibrating apparatus according to claim 2, wherein the structure of the middle connecting pipe (18) is a circular pipe, the middle connecting pipe (18) rotates along with the rotating ring (17), and the left limiting plate (20) and the right limiting plate (19) are located at two sides of the top circular cover (34).
4. A gas meter calibrating device according to claim 1, characterized in that the bottom rectangular box (7) is configured as a rectangular box, the circular platform ring (1) is adapted to the middle circular hole (12), the left front upright (3) and the left rear upright (4) are located at one side of the top support plate (6), and the right front upright (2) and the right rear upright (5) are located at the other side of the top support plate (6).
5. A gas meter calibrating device according to claim 2, characterized in that the circular truncated cone ring (1) is in the form of a hollow circular truncated cone, and the inner rotating ring (17) rotates in the middle of the circular truncated cone ring (1).
6. A gas meter calibration device according to claim 1, wherein the left rear tie rod (29) and the left front tie rod (30) are located at both ends of the left limiting plate (20), and the right rear tie rod (31) and the right front tie rod (32) are located at both ends of the right limiting plate (19).
7. The gas meter calibrating device according to claim 2, wherein the inner surface of the circular truncated cone ring (1) is provided with threads, the outer surface of the inner rotating ring (17) is provided with threads, and the inner rotating ring (17) moves up and down in the middle of the circular truncated cone ring (1).
CN202311002195.9A 2023-08-10 2023-08-10 Gas instrument calibrating device Pending CN117269419A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311002195.9A CN117269419A (en) 2023-08-10 2023-08-10 Gas instrument calibrating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311002195.9A CN117269419A (en) 2023-08-10 2023-08-10 Gas instrument calibrating device

Publications (1)

Publication Number Publication Date
CN117269419A true CN117269419A (en) 2023-12-22

Family

ID=89203445

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311002195.9A Pending CN117269419A (en) 2023-08-10 2023-08-10 Gas instrument calibrating device

Country Status (1)

Country Link
CN (1) CN117269419A (en)

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