CN2867302Y - Volumetric turbine flowmeter - Google Patents

Abstract

The utility model discloses a positive displacement turbine flowmeter. It comprises a housing (1), a turbine (4) disposed inside the housing, a sensor assembly, a fluid inlet (2)and a fluid outlet (3) both disposed on the housing and vertically to each other, a supporter (9) disposed inside the housing and provided with holes, and bearing mount hole (10) disposed in the supporter (9). The turbine is installed beside the fluid inlet (2) by using a turbine shaft (5). Two ends of the turbine shaft (5) are connected to the bearing mount hole (10) and the housing respectively. Metering chambers are defined by the space between two impellers of the turbine and the space between the upper end surface of the supporter and the inner wall of the housing. The sensor assembly consists of sensor (11), wiring board (13) and signal wire (15) and is arranged on the housing. The utility model integrates the functions of turbine flowmeter and positive displacement flowmeter and extends the metering range of small flow meters. In addition, it has advantages of small size, simple structure, stable performance, high metering accuracy, and no requirements of installation conditions.

Description

The positive displacement turbo flow meter

Affiliated technical field

The utility model belongs to the flowmeter technology field, and what relate generally to is a kind of positive displacement turbo flow meter.

Technical background

Known flow is in respect of multiple, and vane-wheel type flowmeter, volumeter are two more common in flowmeter series.Turbo flow meter belongs to vane type series, and scraper-type flowmeter, piston liquid meter, the wheeled flowmeter of waist belong to positive displacement series.

At present, turbo flow meter commonly used both at home and abroad is to come meter fluid by the rotating speed that detects turbine.Its structure is generally: turbine, and turboshaft and axle support member are all installed along housing interior conduit direction, and fluid enters and discharges along the tube chamber axial direction.Its upstream fluid pressure in axial direction acts on turbo blade, promotes the turbine rotation, realizes measuring purpose with this.The turbo flow meter of this structure is because exist bigger slit, when the downstream fluid can not be full of tube chamber between two blades of turbine, particularly under the situation of low discharge, a part of fluid passes through between two blades, and its acting force is more little, flow loss is big more, and error in dipping is big more.Thereby cause the turbo flow meter flow range little, defectives such as low discharge metering poor stability.In addition, because the special construction of turbo flow meter blade, its irregular movement of upstream fluid when rotated and the vortex phenomenon that downstream fluid produces influence secondary speed, cause measuring misalignment, and the accuracy of turbo flow meter and stability can't be guaranteed.Therefore, the turbo flow meter of said structure will take appropriate measures in use, revises its unfavorable factor, improves its stability and accurate measurement performance, and the method for taking is: level or flowmeter vertically is installed; Upstream and downstream is installed enough straight lengths; Be equipped with rectification facilities etc.Require flowmeter upstream and downstream pressure substantially constant simultaneously, fluid flows steadily, and downstream fluid is full of tube chamber etc.Like this, the supporting in use facility of turbo flow meter is many, and cost increases, and the factor that influences accuracy of detection is many.Limited the usable range of turbo flow meter.

Volumeter, as the scraper-type flowmeter, piston liquid meter, the wheeled flowmeters of waist etc. are to be unit with the single cavity volume of flowmeter, accumulation realizes the metering purpose, though its when using measuring accuracy influenced by mounting condition less.But volumeter, volume is bigger, requires the upstream enough pressure to be arranged to promote the motion of flowmeter rotary body during use, and therefore, volumeter only is fit to the measurement of fluid under the specific condition.

Summary of the invention:

The purpose of this utility model is to propose a kind of positive displacement turbo flow meter.Make its two-fold advantage that possesses turbo flow meter and volumeter, further expanded the small flowmeter weight range, it is little, simple in structure to have a volume, stable performance, and accuracy of measuring height is not subjected to the characteristics by the dress condition restriction.

For achieving the above object, the technical scheme that the utility model is taked is: it is made up of flowmeter shell, turbine, turboshaft, support, sensor module, housing is provided with fluid inlet and fluid egress point, and fluid inlet and fluid egress point are the vertical mode setting; In housing, be provided with support and turbine, support is positioned at the fluid egress point position, have on it that fluid portals and bearing mounting hole, turbine is arranged on the fluid inlet position by turboshaft and turboshaft is vertical with fluid inlet, one end of turboshaft is connected with the bearing mounting hole on the support, and other end housing connects; Sensor module is made of sensor, terminal block and signal wire, and sensor is arranged on the housing, and it is connected by terminal block with signal wire.

The utility model is reasonable in design, and is simple in structure.Its design feature with vane-wheel type flowmeter and volumeter comprehensively is an one, make it possess turbo flow meter, the two-fold advantage of volumeter, simultaneously, having overcome existing vane-wheel type flowmeter and volumeter is subjected to the mounting condition restriction big, volume is big, and measuring accuracy is low, the shortcoming that cost is high.Further improved measuring accuracy, expanded the measures range of low discharge low discharge; Because the import of fluid and outlet are vertical setting, export the support that has increased semi-circular structure, have further improved the accuracy of detection of detecting device thus, make detecting device volume greatly reduce.And reduced the error in dipping that turbo flow meter produces because of friction force, avoided existing flowmeter big to low discharge fluid metering error, even non-metering phenomenon, the stability and the accuracy of detection of raising flowmeter.Because entering of fluid is to cut from the impeller middle part of turbine to promote the turbine rotation, thereby increased the stressed torque of turbo blade, reduced the friction force that influences the turbine rotation accordingly, thereby reduced gauging loss.Do not installed and environmental influence, be suitable for varying environment liquid, the measurement of gas.

Description of drawings

Fig. 1 is the utility model one-piece construction synoptic diagram.

Fig. 2 is the structural representation at the utility model turbine position.

Fig. 3 is Fig. 2 A-A cut-away view.

Fig. 4 is the utility model supporting structure synoptic diagram.

Fig. 5 is the structural representation of the utility model sensor module.

Among the figure: 1, housing, 2, fluid inlet, 3, fluid egress point, 4, turbine, 5, turboshaft, 6, sliding bearing, 7,8, solid bearing, 9, support, 10, bearing mounting hole, 11, sensor, 12, sensor pressure pad, 13, terminal block, 14, the rubber pressure pad, 15, signal wire.

Embodiment

In conjunction with the accompanying drawings, it is as follows to provide example of the present utility model:

As shown in Figure 1: present embodiment is made of housing 1, turbine 4, support 9 and sensor 11, have fluid inlet 2 and fluid egress point 3 on the housing 1, this fluid inlet 2 and fluid egress point 3 are the vertical mode setting, be connected with fluid line for convenient, fluid inlet 2 and fluid egress point 3 can be designed to helicitic texture.Be provided with support 9 and turbine 4 in housing 1, support 9 is positioned at fluid egress point 3 positions.Support shown in Figure 4 is a schistose texture, has perforate on it, and the relative fluid inlet of this perforate 2 is provided with and is communicated with fluid egress point 3, and perforate is one or two, present embodiment be two fan-shaped.Be provided with bearing mounting hole 10 at the center of support 9.Turbine 4 centers are with sliding bearing 6, turboshaft 5 is positioned at sliding bearing inside, the one end is connected with bearing mounting hole 10 on the support 9, solid bearing 7 in the other end and the housing 1 is connected, make turbine 4 be positioned at the position of housing 1 inner fluid import 2 and fluid egress point 3, the lower surface of turbine 4 is close to the upper surface of support 9 and along its rotation, is made between 4 liang of impellers of turbine thus and form between the inwall of the upper surface of support 9 and housing 1 and measure cavity, and the fluid that enters in it is carried out metering.Because entering of fluid is to cut from the impeller middle part of turbine to promote the turbine rotation, thereby only needs less pressure can promote turbine 4 rotations.On housing 1, also be provided with sensor module, as shown in Figure 5, sensor module is made of the sensor 11, sensor pressure pad 12, terminal block 13, rubber pressure pad 14 and the signal wire 15 that are arranged in the sensor housing body, sensor 11 adopts Hall element, sensor housing and detecting device housing (1) are by being threaded, fixing by sensor pressure pad 12, it is connected by terminal block 13 with signal wire 15, the safe reliability of using for guaranteeing is provided with rubber pressure pad 14 at the connecting portion of terminal block 13 and signal wire 15.When present embodiment uses, it is installed on the fluid passage, fluid enters from the fluid inlet 2 of housing 1, make between 4 liang of impellers of turbine and form between the inwall of the upper surface of support 9 and housing 1 and measure cavity, utilize hydrodynamic pressure to promote turbine 4 rotations, perforate on support 9 is flowed out by fluid egress point 3, and the Hall element in the sensor module spreads out of the signal of gathering to Displaying Meter through signal wire.

Claims (4)

1, a kind of positive displacement turbo flow meter, comprise housing (1), turbine (4) and sensor module, have fluid inlet (2) and fluid egress point (3) on the housing (1), it is characterized in that: fluid inlet (2) and fluid egress point (3) on the described housing (1) are the vertical mode setting, be provided with support (9) and turbine (4) in housing (1), support (9) is a schistose texture, has perforate on it, be arranged on fluid egress point (3) position, be provided with bearing mounting hole (10) at the center of support (9); Turbine (4) is arranged on fluid inlet (2) position by turboshaft (5) and turboshaft (5) is vertical with fluid inlet (2), solid bearing (8) in the bearing mounting hole (10) on one end of turboshaft (5) and the support (9) is connected, solid bearing (7) in the other end and the housing (1) is connected, and is formed with the metering cavity between the inwall of between two impellers of turbine (4) and upper surface of support (9) and housing (1); Sensor module is made of sensor (11), terminal block (13) and signal wire (15), and sensor module is arranged in the housing (1), and it is connected by terminal block (13) with signal wire (15).

2, positive displacement turbo flow meter according to claim 1 is characterized in that: the perforate on the described support (9) is two fan shape.

3, positive displacement turbo flow meter according to claim 1, it is characterized in that: described sensor module is arranged in the sensor housing, and this sensor housing and detecting device housing (1) are by being threaded.

4, positive displacement turbo flow meter according to claim 1 is characterized in that: described terminal block (13) is provided with rubber pressure pad (14) with the connecting portion of signal wire (15).

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