CN210952978U

CN210952978U - Spiral rotor flowmeter

Info

Publication number: CN210952978U
Application number: CN202020023014.6U
Authority: CN
Inventors: 张蔚; 张跃进; 戴秋晨
Original assignee: Yinyi Measuring Instrument Shanghai Co ltd
Current assignee: Yinyi Measuring Instrument Shanghai Co ltd
Priority date: 2020-01-07
Filing date: 2020-01-07
Publication date: 2020-07-07
Anticipated expiration: 2030-01-07

Abstract

The utility model discloses a spiral rotor flow meter, include: the device comprises a shell, wherein an inlet and an outlet are respectively arranged on two sides of the shell; the first screw rod is rotatably arranged in the shell; the second screw rod is rotatably arranged in the shell and is arranged in parallel with the first screw rod. The spiral rotor flowmeter has the advantages of simple structure, small volume, no pulsation, low noise, high precision, high reliability, high flow rate, strong environmental adaptability and the like, and adopts a pair of spiral rotors with special tooth shapes. The spiral rotor flowmeter leads the flow velocity of the introduced fluid to be stable through the arrangement of the flow guide mechanism, can prolong the service life of the turbine flowmeter, and can accurately and stably measure the flow of the fluid for a long time.

Description

Spiral rotor flowmeter

Technical Field

The utility model relates to a technical field of flowmeter, in particular to spiral rotor flowmeter.

Background

Positive displacement flow measurement uses a fixed small volume to repeatedly meter the volume of fluid through a flow meter. Therefore, there must be a space within the volumetric flow meter that constitutes a standard volume, commonly referred to as the "metering space" or "metering chamber" of the volumetric flow meter. This space is formed by the inner wall of the meter housing and the rotating parts of the meter. The working principle of the positive displacement flowmeter is as follows: when fluid passes through the flowmeter, a certain pressure difference is generated between the inlet and the outlet of the flowmeter. The rotating part of the flowmeter (called rotor for short) rotates under the action of the pressure difference and discharges the fluid from the inlet to the outlet. In this process, the fluid fills the "metering volume" of the meter one time at a time and is then continuously sent to the outlet. The volume of the metering space is determined for a given flow meter condition, and a cumulative value of the volume of fluid passing through the flow meter is obtained as long as the number of revolutions of the rotor is measured.

The existing positive displacement flowmeter has a complex structure and a large volume; the types, calibers and working states of the measured media are relatively limited; noise and vibration are generated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a spiral rotameter solves one or more among the above-mentioned prior art problem.

The utility model provides a spiral rotor flow meter, include:

the device comprises a shell, wherein an inlet and an outlet are respectively arranged on two sides of the shell;

the first screw rod is rotatably arranged in the shell;

the second screw rod is rotatably arranged in the shell and is arranged in parallel with the first screw rod.

In some embodiments, the fluid guiding device further comprises a first fluid guiding mechanism and a second fluid guiding mechanism, the first fluid guiding mechanism and the second fluid guiding mechanism are arranged in the shell and located on two sides of the first screw and the second screw, the first fluid guiding mechanism is used for guiding fluid to the first screw and the second screw, and the second fluid guiding mechanism is used for guiding fluid from the first screw and the second screw to the outflow port.

In some embodiments, the first diversion mechanism includes a first triangular cone, a first shaft, a plurality of blades disposed on the first shaft, and a first diversion cone, wherein the first triangular cone tapers in a direction opposite to the direction of fluid flow, and the first diversion cone tapers in a direction opposite to the direction of fluid flow; the second diversion mechanism comprises a second triangular cone, a second shaft, a plurality of blades arranged on the second shaft and a second diversion cone, the taper direction of the second triangular cone is the same as the flow direction of the fluid, and the taper direction of the second diversion cone is the same as the flow direction of the fluid.

In some embodiments, a first screw is circumferentially provided with a helical first protrusion, and a second screw is circumferentially provided with a helical second protrusion that is embedded in a groove formed by an adjacent first protrusion.

In some embodiments, the first protrusion has a width greater than the second protrusion.

In some embodiments, the thickness of the first protrusion is the same as the thickness of the second protrusion.

In some embodiments, the diameter of the first screw is smaller than the diameter of the second screw.

Has the advantages that:

the utility model discloses a spiral rotameter simple structure, small adopts the spiral rotor of a pair of special profile of tooth, makes it have no pulsation, and the noise is extremely low, and the high accuracy, the high reliability, the flow is big, advantages such as environmental suitability is strong.

The spiral rotor flowmeter leads the flow velocity of the introduced fluid to be stable through the arrangement of the flow guide mechanism, can prolong the service life of the turbine flowmeter, and can accurately and stably measure the flow of the fluid for a long time.

Drawings

Fig. 1 is a schematic structural diagram of a helical rotor flow meter according to an embodiment of the present invention;

fig. 2 is a partial schematic structural view of a helical rotor flow meter according to an embodiment of the present invention;

fig. 3 is a schematic view of a partial structure of a helical rotor flow meter according to an embodiment of the present invention.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, 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 partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

As shown in fig. 1 and 2:

a helical rotameter comprising:

the device comprises a shell 10, wherein an inlet 11 and an outlet 12 are respectively arranged on two sides of the shell 10;

a first screw 20 rotatably disposed in the housing 10;

and a second screw 30 rotatably provided in the housing 10 and arranged in parallel with the first screw 20.

Further, the fluid guide device further comprises a first fluid guide mechanism 40 and a second fluid guide mechanism 50, wherein the first fluid guide mechanism 40 and the second fluid guide mechanism 50 are arranged in the housing 10 and located at two sides of the first screw 20 and the second screw 30, the first fluid guide mechanism 40 is used for guiding fluid to the first screw 20 and the second screw 30, and the second fluid guide mechanism 50 is used for guiding fluid from the first screw 20 and the second screw 30 to the outlet 12.

Further, the first diversion mechanism 40 includes a first triangular cone 41, a first shaft 42, a plurality of blades arranged on the first shaft, and a first diversion cone 43, a taper direction of the first triangular cone 41 is opposite to a fluid flow direction, and a taper direction of the first diversion cone 43 is opposite to the fluid flow direction; the second diversion mechanism 50 includes a second triangular cone 51, a second shaft 52, a plurality of blades arranged on the second shaft, and a second diversion cone 53, the taper direction of the second triangular cone 51 is the same as the fluid flow direction, and the taper direction of the second diversion cone 53 is the same as the fluid flow direction.

The first guide mechanism is arranged to stably guide the fluid into the first screw and the second screw, so that the side face stability of the spiral rotor flow meter is improved.

Further, a spiral first protrusion 21 is circumferentially arranged on the first screw 20, a spiral second protrusion 31 is circumferentially arranged on the second screw 30, and the second protrusion 31 is embedded into a groove formed by the adjacent first protrusion 21.

The first screw and the second screw are matched with each other, so that the screw has the advantages of no pulsation, extremely low noise, high precision, high reliability, large flow, strong environmental adaptability and the like.

Further, the width of the first protrusion 21 is larger than that of the second protrusion 31.

Further, the thickness of the first protrusion 21 is the same as that of the second protrusion 31.

Further, the diameter of the first screw 20 is smaller than the diameter of the second screw 30.

The utility model discloses spiral rotameter simple structure, small adopts the spiral rotor of a pair of special profile of tooth, makes it have no pulsation, and the noise is extremely low, and the high accuracy, high reliability, the flow is big, advantages such as environmental suitability is strong.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many variations and modifications can be made without departing from the inventive concept, and these should also be considered as within the scope of the present invention.

Claims

1. A helical rotameter, comprising:

the device comprises a shell (10), wherein an inflow port (11) and an outflow port (12) are respectively arranged on two sides of the shell (10);

a first screw (20) rotatably provided in the housing (10);

and a second screw (30) which is rotatably provided in the housing (10) and is arranged in parallel with the first screw (20).

2. A helical rotameter according to claim 1, further comprising a first flow directing mechanism (40) and a second flow directing mechanism (50), said first flow directing mechanism (40) and said second flow directing mechanism (50) being disposed within said housing (10) and being located on opposite sides of said first screw (20) and said second screw (30), said first flow directing mechanism (40) being adapted to direct fluid to said first screw (20) and said second screw (30), said second flow directing mechanism (50) being adapted to direct fluid from said first screw (20) and said second screw (30) to said outlet (12).

3. The helical rotameter of claim 2, wherein said first flow directing means (40) comprises a first triangular cone (41), a first shaft (42), a plurality of blades disposed on said first shaft, and a first flow directing cone (43), said first triangular cone (41) tapering in a direction opposite to the direction of fluid flow, said first flow directing cone (43) tapering in a direction opposite to the direction of fluid flow; the second diversion mechanism (50) comprises a second triangular cone (51), a second shaft (52), a plurality of blades arranged on the second shaft and a second diversion cone (53), the taper direction of the second triangular cone (51) is the same as the flow direction of the fluid, and the taper direction of the second diversion cone (53) is the same as the flow direction of the fluid.

4. A screw rotor flow meter according to claim 1, wherein the first screw (20) is circumferentially provided with a helical first protrusion (21), and the second screw (30) is circumferentially provided with a helical second protrusion (31), the second protrusion (31) being embedded in a groove formed by an adjacent first protrusion (21).

5. A helical rotameter as claimed in claim 4, characterised in that said first projections (21) have a greater width than said second projections (31).

6. A helical rotameter as claimed in claim 4, characterised in that said first projections (21) have the same thickness as said second projections (31).

7. A helical rotameter as claimed in claim 4, wherein said first screw (20) has a diameter smaller than the diameter of said second screw (30).