CN217304047U

CN217304047U - Miniature volumetric flowmeter

Info

Publication number: CN217304047U
Application number: CN202221131704.9U
Authority: CN
Inventors: 刘杰; 唐勇志; 王国武; 曹玉柱; 王欣
Original assignee: Hefei Jingda Instrument Co ltd
Current assignee: Hefei Jingda Instrument Co ltd
Priority date: 2022-05-11
Filing date: 2022-05-11
Publication date: 2022-08-26
Anticipated expiration: 2032-05-11

Abstract

The utility model relates to a flow measurement technical field, and a miniature volumetric flowmeter is disclosed, including flowmeter main part and volume room, the below setting that the volume room is located the flowmeter main part, the indoor rotation of volume is equipped with first oval gear subassembly and the oval gear subassembly of second, first oval subassembly meshes with the oval subassembly of second mutually and is connected, the mounting groove has all been seted up to the terminal surface both sides of first oval subassembly, the equal fixed embedding in inside of every mounting groove is equipped with the magnet steel, the inside embedding of volume room is equipped with hall sensor, hall sensor and volume room all with flowmeter main part signal connection. This application can improve the measurement accuracy of fluid flow greatly through the redundant design of two measurement methods, simple structure, convenient to use.

Description

Miniature volumetric flowmeter

Technical Field

The application relates to the technical field of flow measurement, in particular to a miniature volumetric flowmeter.

Background

Positive displacement meters are the most accurate type of flow meters that utilize a mechanical measuring element to continuously divide the fluid into individual known volume portions, and measure the total volume of the fluid based on the number of times the measuring chamber is filled and drained of successive repetitions of the volume portion.

In the process of implementing the present application, the inventor finds that at least the following problems exist in the technology, and the common positive displacement flowmeter mostly measures the rotating speed or the rotating number of the meshing part in the volume chamber through a counter during detection, but the method is simple, and the measuring precision is low during use, so that the micro positive displacement flowmeter is provided.

SUMMERY OF THE UTILITY MODEL

The purpose of this application is in order to solve among the prior art volumetric flowmeter and measure through meshing piece rotational speed or the revolution in the counter measurement volume room mostly when detecting, but this kind of mode is comparatively single, when using, the lower problem of measurement accuracy, and the miniature volumetric flowmeter who provides.

In order to achieve the purpose, the following technical scheme is adopted in the application:

the utility model provides a miniature positive displacement flowmeter, includes flowmeter main part and volume room, the below that the volume room is located the flowmeter main part sets up, the indoor rotation of volume is equipped with first oval gear subassembly and the oval gear subassembly of second, first oval subassembly meshes with the oval subassembly of second mutually and is connected, the mounting groove has all been seted up to the terminal surface both sides of first oval subassembly, every the equal fixed embedding in inside of mounting groove is equipped with the magnet steel, the inside embedding of volume room is equipped with hall sensor, hall sensor and volume room all with flowmeter main part signal connection.

By adopting the technical scheme, the measurement accuracy of the fluid flow can be greatly improved through the redundant design of the double-measurement mode, the structure is simple, and the use is convenient.

Preferably, the lower end of the volume chamber is provided with an opening, a rear cover is arranged below the volume chamber, and a group of internal hexagonal stud screws are in threaded connection with the end face of the rear cover and the end face of the volume chamber together.

By adopting the technical scheme, the volume chamber can be conveniently overhauled and maintained.

Preferably, a digital display counter is arranged on the side wall of the flowmeter main body.

By adopting the technical scheme, the real-time detection result can be conveniently displayed.

Preferably, a connector is integrally arranged at one end, close to the flowmeter body, of the volume chamber, and a group of hexagon bolts are in threaded connection with the outer side wall of the casing of the connector and the end face of the flowmeter body together.

By adopting the technical scheme, the volume chamber and the flowmeter main body can be conveniently connected and assembled.

Preferably, the annular seal groove has all been seted up at the both ends of the different side of volume room, two the inside of annular seal groove all is equipped with O type seal ring, two O type seal ring's lateral wall all is the setting of offseting with the lateral wall of back lid and the lateral wall of flowmeter body.

By adopting the technical scheme, the sealing performance between the volume chamber and the rear cover and between the volume chamber and the flowmeter main body can be effectively improved through the O-shaped sealing washer.

Preferably, the backlash between the elliptical gears of the first and second elliptical gear assemblies and the inner wall of the volume chamber is maintained in the range of 0.01mm to 0.02 mm.

By adopting the technical scheme, no leakage of fluid can be ensured, and the elliptic gears of the first elliptic gear assembly and the second elliptic gear assembly do not touch the shell wall of the volume chamber, so that the abrasion is reduced.

Compared with the prior art, the method has the following beneficial effects:

this miniature positive displacement flowmeter, through the flowmeter body that is equipped with, the volume room, first oval gear subassembly, mutually supporting of the oval gear subassembly of second, can rotate through oval meshing, cut apart into single unit with the fluid and be full of the emission, can survey fluid flow, mutually supporting through two magnet steel that are equipped with and hall sensor, can utilize first oval gear subassembly pivoted magnetism at every turn to change and record flow, through the redundant design of two measurement methods, can improve fluid flow's measurement accuracy greatly, moreover, the steam generator is simple in structure, high durability and convenient use.

The part that does not relate to in the device all is the same with prior art or can adopt prior art to realize, and this application can improve the measurement accuracy of fluid flow greatly through the redundant design of two measurement methods, simple structure, convenient to use.

Drawings

FIG. 1 is a schematic structural diagram of a micro positive displacement flowmeter according to the present application;

fig. 2 is an enlarged view of a portion a of fig. 1.

In the figure: 1. a flow meter body; 2. a volume chamber; 3. a first elliptical gear assembly; 4. a second elliptical gear assembly; 5. magnetic steel; 6. a Hall sensor; 7. a rear cover; 8. internal hexagonal stud screws; 9. a counter is digitally displayed; 10. a linker; 11. a hexagon head bolt; 12. an O-shaped sealing gasket.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

Referring to fig. 1-2, a miniature volumetric flowmeter, including flowmeter main part 1 and volume chamber 2, volume chamber 2 is located flowmeter main part 1's below setting, 2 rotations in the volume chamber are equipped with first oval gear assembly 3 and the oval gear assembly 4 of second, first oval subassembly is connected with the oval subassembly looks meshing of second, the mounting groove has all been seted up to the terminal surface both sides of first oval subassembly, the inside equal fixed embedding of every mounting groove is equipped with magnet steel 5, the inside embedding of volume chamber 2 is equipped with hall sensor 6, hall sensor 6 and volume chamber 2 all with flowmeter main part 1 signal connection.

The lower extreme of volume room 2 is the opening setting, and the below of volume room 2 is equipped with hou gai 7, and the terminal surface of hou gai 7 has a set of interior hexagonal socket head cap screw 8 with the common threaded connection of the terminal surface of volume room 2, through hou gai 7 and a set of interior hexagonal socket head cap screw 8, can be convenient for overhaul volume room 2 and maintain.

The side wall of the flowmeter main body 1 is provided with a digital display counter 9, the real-time detection result can be conveniently displayed through the digital display counter 9, and the digital display counter 9 is a BELZ digital display counter.

The volume chamber 2 is close to the integrative connector 10 that is provided with of one end of flowmeter body, and the common threaded connection of the casing lateral wall of connector 10 and the terminal surface of flowmeter main part 1 has a set of hexagon head bolt 11, through this kind of setting, can be convenient for the volume chamber 2 and the equipment of being connected between the flowmeter main part 1.

Annular seal groove has all been seted up at the both ends of 2 different sides in volume chamber, and the inside of two annular seal grooves all is equipped with O type seal ring 12, and the lateral wall of two O type seal ring 12 all is the setting that offsets with the lateral wall of back lid 7 and the lateral wall of flowmeter body, through O type seal ring 12, can effectively improve the leakproofness between volume chamber 2 and back lid 7 and volume chamber 2 and flowmeter main part 1.

The backlash between the elliptic gears of the first elliptic gear assembly 3 and the second elliptic gear assembly 4 and the inner wall of the volume chamber 2 are kept in the range of 0.01mm to 0.02mm, and by the arrangement, no leakage of fluid can be ensured, and no contact is generated between the elliptic gears of the first elliptic gear assembly 3 and the second elliptic gear assembly 4 and the shell wall of the volume chamber 2, so that the abrasion is reduced.

In this application, during the use, after accomplishing flowmeter main part 1 and volume chamber 2 equipment, insert the fluidic pipeline of volume of awaiting measuring and go inside cloth, then the fluid gets into, can be full of the volume between first elliptical gear subassembly 3 and the second elliptical gear subassembly 4, and promote first elliptical gear subassembly 3 and the rotation of second elliptical gear subassembly 4, can survey fluidic flow through measuring pivoted number of turns and speed, when first elliptical gear subassembly 3 rotates, can drive two magnet steel 5 cycle reciprocating's rotation on it, whenever when magnet steel 5 rotatory to hall sensor 6 position department, hall sensor 6 all can obtain the signal, and utilize this to measure fluid flow, and finally, the measurement result of balanced dual mode, can improve measurement accuracy.

The above description is only for the preferred embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present application in the scope of the present application.

Claims

1. The utility model provides a miniature volumetric flowmeter, includes flowmeter main part (1) and volume room (2), its characterized in that, the below that volume room (2) are located flowmeter main part (1) sets up, volume room (2) internal rotation is equipped with first oval gear subassembly (3) and second oval gear subassembly (4), first oval gear subassembly meshes with the oval gear subassembly of second mutually and is connected, the mounting groove has all been seted up to the terminal surface both sides of first oval gear subassembly, every the inside equal fixed embedding of mounting groove is equipped with magnet steel (5), the inside embedding of volume room (2) is equipped with hall sensor (6), hall sensor (6) and volume room (2) all with flowmeter main part (1) signal connection.

2. The micro positive displacement flowmeter according to claim 1, wherein the lower end of the volume chamber (2) is open, a rear cover (7) is arranged below the volume chamber (2), and a set of internal hexagonal stud screws (8) are screwed on the end surface of the rear cover (7) and the end surface of the volume chamber (2) together.

3. A micro positive displacement meter according to claim 1, characterized in that the side wall of the meter body (1) is provided with a digital counter (9).

4. The micro positive displacement flowmeter of claim 1, wherein a connecting body (10) is integrally arranged at one end of the volume chamber (2) close to the flowmeter body, and a group of hexagon head bolts (11) are jointly and threadedly connected with the outer side wall of the shell of the connecting body (10) and the end face of the flowmeter body (1).

5. The micro positive displacement flowmeter of claim 2, wherein two ends of the opposite side of the volume chamber (2) are provided with annular sealing grooves, O-shaped sealing gaskets (12) are arranged inside the two annular sealing grooves, and the side walls of the two O-shaped sealing gaskets (12) are respectively abutted against the side wall of the rear cover (7) and the side wall of the flowmeter body.

6. A miniaturised positive displacement flowmeter according to claim 1, characterised in that the backlash between the elliptic gears of the first (3) and second (4) elliptic gear assemblies and the inner wall of the volume chamber (2) is kept in the range of 0.01mm to 0.02 mm.