CN212363307U

CN212363307U - Wet-type gas flowmeter for laboratory

Info

Publication number: CN212363307U
Application number: CN202021420977.6U
Authority: CN
Inventors: 武博文
Original assignee: Shandong University of Science and Technology
Current assignee: Shandong University of Science and Technology
Priority date: 2020-07-17
Filing date: 2020-07-17
Publication date: 2021-01-15
Anticipated expiration: 2030-07-17

Abstract

The utility model relates to a measuring instrument measures technical field, especially relates to a wet-type gas flowmeter is used in laboratory, the welding of box upper portion has last casing, go up the casing and install U type pipe differential pressure gauge, blast pipe, spirit level and thermometer, there is a rotary drum inside the box, rotary drum rolling bearing welds in the intake pipe, the utility model discloses a U type pipe differential pressure gauge, blast pipe, spirit level, box, rotary drum, the main equipment device of thermometer and intake pipe can the accurate measurement of low discharge gas volume and speed according to the number of turns of rotation, has solved the less hour shortcoming of inaccurate, the error of measuring of gas pressure and gas speed.

Description

Wet-type gas flowmeter for laboratory

Technical Field

The utility model relates to a measuring instrument measures technical field, especially relates to a wet-type gas flowmeter is used in laboratory.

Background

In the process of gas delivery in a laboratory, when the volume total amount of gas is measured, a rotor flow meter is used for measuring the large-flow gas, the rotor flow meter has good adjusting degree, the gas flow rate is clear at a glance, and the accuracy of the measuring result is high.

When the gas with small flow is measured, the pressure and the gas speed are small, the influence on the buoyancy of the floating rotor is small, the floating rotor cannot rise, and therefore large errors are generated in the measurement of the gas flow, and the reading is inaccurate. Therefore, we propose a laboratory wet gas meter to solve this problem at the conditions of small gas flow rates involved in the experiment.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a wet-type gas flowmeter is used in laboratory possesses the gaseous accurate measuring advantage of low discharge, and the unsafe problem of reading when having solved conventional rotameter measurement low discharge gas because pressure and gas velocity are less, and the buoyancy to the rotor that floats influences very little, can't float it and rise, produces great error to gas flow's measurement.

In order to achieve the above object, the utility model provides a following technical scheme: a wet gas flowmeter for a laboratory comprises a box body, wherein a level gauge and an upper shell are fixedly welded on the upper portion of the box body, a fixed head and a detachable fixed head are mounted at the top of the upper shell, the fixed head is of a sealed non-detachable structure, a U-shaped tube differential pressure gauge is fixedly sealed by the fixed head, the detachable fixed head is connected with a thermometer in a penetrating mode, and an exhaust pipe is fixedly welded on the right side of the upper shell; a water level display pipe is arranged on the right side of the box body, and a water level device is suspended in the water level display pipe; the interior of the box body comprises a rotary drum and an air inlet pipe, and a rotary bearing in the rotary drum is connected to the air inlet pipe; an air inlet pipe and a water outlet are welded at the rear part of the box body, the air inlet pipe extends into the rotary drum in the box body, and the water outlet is connected to the inside of the box body; the lower part of the box body is fixedly welded with a fixed support, the lower part of the fixed support is provided with a supporting leg, and the joint of the supporting leg is provided with an adjusting nut.

Preferably, the upper part of the box body is welded with an upper shell, the right side of the upper shell is provided with an exhaust pipe, and the upper shell is welded with the surface of the exhaust pipe.

Preferably, a water level indicator is suspended in the water level display tube on the right side of the box body, the water level display tube is made of glass and is fixed on the right side of the box body in a sealing mode, and the water level indicator is made of a shuttle-shaped material made of polymethacrylimide.

Preferably, a rotary drum is arranged in the box body, the rotary drum is of a four-chamber structure with the same volume, the rotary drum is made of stainless steel after being subjected to corrosion protection treatment, and a rotary bearing of the rotary drum is welded on the air inlet pipe.

Preferably, the welding of box lower part has the fixed bolster, the fixed bolster material is high strength resin material, the supporting legs of fixed bolster lower part uses equilateral triangle to carry out equilateral distribution as the benchmark.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the utility model discloses a U type pipe differential pressure gauge, blast pipe, spirit level, box, rotary drum, the main equipment device of thermometer and intake pipe can the accurate measurement small flow gas volume and speed according to the number of turns of rotating, has solved that gas pressure and gas speed are inaccurate, the big shortcoming of error of measurement when less.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a side view of the present invention.

In the figure: 1. a U-tube differential pressure gauge; 2. a fixed head; 3. an exhaust pipe; 4. a level gauge; 5. a box body; 6. a drum;

7. a water level device; 8. a water level display pipe; 9. fixing a bracket; 10. supporting legs; 11. a thermometer; 12. the fixing head can be disassembled; 13. an upper housing; 14. an air inlet pipe; 15. adjusting the nut; 16. and a water outlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 and 2, the wet gas flowmeter for the laboratory comprises a box body 5, wherein a level 4 and an upper shell 13 are fixedly welded on the upper part of the box body 5, a fixed head 2 and a detachable fixed head 12 are installed on the top of the upper shell 13, the fixed head 2 is of a sealed non-detachable structure, the fixed head 2 is used for sealing and fixing a U-shaped tube differential pressure gauge 1, the detachable fixed head 12 is in penetrating connection with a thermometer 11, and an exhaust pipe 3 is fixedly welded on the right side of the upper shell 13; a water level display pipe 8 is arranged on the right side of the box body 5, and a water level device 7 is suspended in the water level display pipe 8; the box body 5 comprises a rotary drum 6 and an air inlet pipe 14, and a rotary bearing in the rotary drum 6 is connected to the air inlet pipe 14; an air inlet pipe 14 and a water outlet 16 are welded and installed at the rear part of the box body 5, the air inlet pipe 14 extends into the rotary drum 6 inside the box body 5, and the water outlet 16 is connected to the inside of the box body 5; a fixed support 9 is fixedly welded at the lower part of the box body 5, a supporting leg 10 is arranged at the lower part of the fixed support 9, and an adjusting nut 15 is arranged at the joint of the supporting leg 10; through the main equipment devices of the U-shaped pipe differential pressure gauge 1, the exhaust pipe 3, the level gauge 4, the box body 5, the rotary drum 6, the thermometer 11 and the air inlet pipe 14, the volume and the speed of the low-flow gas can be accurately measured according to the number of rotation turns, and the defects of inaccurate measurement and large error when the gas pressure and the gas speed are small are overcome.

In the embodiment, specifically, the top of the upper shell 13 is provided with a fixed head 2 and a detachable fixed head 12 which are respectively connected to the U-shaped tube differential pressure gauge 1 and the thermometer 11, the head end of the U-shaped tube differential pressure gauge 1 is closed, the tail end of the U-shaped tube differential pressure gauge 1 is fixed and can not be detached, liquid is filled in the U-shaped tube differential pressure gauge, each scale of the liquid is 0.01kPa, the thermometer 11 can be taken out from the upper part after the detachable fixed head 12 is loosened, meanwhile, solution with a standard volumetric flask constant volume can be added from the position, and the temperature and the pressure of the environment.

In the embodiment, specifically, a water level indicator 7 is suspended inside a water level display tube 8 on the right side of the tank 5, the water level display tube 8 is made of glass and is hermetically fixed on the right side of the tank 5, and the water level indicator 7 inside the water level display tube is made of a spindle-shaped material made of polymethacrylimide, so as to indicate the volume of liquid inside the tank, and check whether the water level reaches a preset position, so as to change water and supplement.

In the embodiment, specifically, the rotary bearing of the rotary drum 6 inside the box 5 is connected to the air inlet pipe 14, after surface welding, after gas is introduced from the air inlet pipe 14, the rotary drum 6 starts to rotate clockwise, the inside of the rotary drum is divided into four chambers, and reciprocating circulation of gas filling and gas exhausting occurs in the chambers, which is visually represented as the number of turns of the rotary drum 6, so as to calculate the gas flow rate.

In the embodiment, specifically, the supporting legs 10 are installed on the lower portion of the fixing support 9, the adjusting nuts 15 are installed at the joints of the supporting legs 10, and the adjusting nuts 15 are adjusted to be matched with the level meter 4 on the upper portion of the box body 5, so that the level of the device can be calibrated, and accurate measurement of small-volume gas in a stable state is facilitated.

The working principle is as follows: the device is placed on a workbench, an adjusting nut 15 is adjusted to enable the bubble of the level gauge 4 to be positioned at the center, the center position is also kept in the using process, distilled water with a calibrated volume is injected into a box body 5 at a position of a detachable fixing head 12, whether a water level indicator 7 suspended inside a water level display tube 8 reaches a preset position or not is observed, a rotary drum 6 is provided with four variable-area-shaped blades, the four blades form four small chambers with equal volumes, the lower half part of the drum is soaked in the water, gas sequentially enters each chamber from an air inlet pipe 14 in the middle of the back of the box body 5 and is continuously discharged from the top, and the rotary wheel is forced to rotate ceaselessly. Before the measurement is started, the thermometer 11 is installed, the air inlet pipe 14 and the exhaust pipe 3 are connected with the air path in a sealing mode, then gas measurement is carried out, the gas volume is clearly obtained according to the number of turns of the rotary drum 6 in rotation, the temperature and the room temperature are kept as consistent as possible in the using process, the gas cannot be used when the gas pressure is too large, and the measured gas is insoluble in water and does not corrode a flowmeter.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a wet-type gas flowmeter is used in laboratory, includes box (5), its characterized in that: a level (4) and an upper shell (13) are fixedly welded on the upper portion of the box body (5), a fixed head (2) and a detachable fixed head (12) are installed on the top of the upper shell (13), the fixed head (2) is of a sealed non-detachable structure, the fixed head (2) is fixedly sealed with the U-shaped tube differential pressure gauge (1), the detachable fixed head (12) is connected with the thermometer (11) in a penetrating mode, and the exhaust pipe (3) is fixedly welded on the right side of the upper shell (13); a water level display pipe (8) is installed on the right side of the box body (5), and a water level device (7) is suspended in the water level display pipe (8); the box body (5) comprises a rotary drum (6) and an air inlet pipe (14) inside, and a rotary bearing inside the rotary drum (6) is connected to the air inlet pipe (14); an air inlet pipe (14) and a water outlet (16) are welded and installed at the rear part of the box body (5), the air inlet pipe (14) extends into the rotary drum (6) inside the box body (5), and the water outlet (16) is connected to the inside of the box body (5); the lower part of the box body (5) is fixedly welded with a fixed support (9), supporting legs (10) are installed on the lower part of the fixed support (9), and adjusting nuts (15) are installed at the joints of the supporting legs (10).

2. The wet gas flowmeter for a laboratory according to claim 1, wherein: the welding of box (5) upper portion has last casing (13), it has blast pipe (3) to go up casing (13) right side installation trompil, go up casing (13) and blast pipe (3) surface welding.

3. The wet gas flowmeter for a laboratory according to claim 1, wherein: the water level indicator is characterized in that a water level indicator (7) is suspended inside a water level display tube (8) on the right side of the box body (5), the water level display tube (8) is made of glass and is fixed on the right side of the box body in a sealing mode, and the water level indicator (7) is made of a shuttle-shaped material made of polymethacrylimide.

4. The wet gas flowmeter for a laboratory according to claim 1, wherein: the anti-corrosion device is characterized in that a rotary drum (6) is arranged in the box body (5), the rotary drum (6) is of a four-cavity structure with the same volume, the rotary drum (6) is made of stainless steel subjected to anti-corrosion treatment, and a rotary bearing of the rotary drum (6) is welded on the air inlet pipe (14).

5. The wet gas flowmeter for a laboratory according to claim 1, wherein: the welding of box (5) lower part has fixed bolster (9), fixed bolster (9) material is high strength resin material, supporting legs (10) of fixed bolster (9) lower part use equilateral triangle to carry out equilateral distribution as the benchmark.