CN1465959A

CN1465959A - Biased rotary-wing type volume watermeter

Info

Publication number: CN1465959A
Application number: CNA021250480A
Authority: CN
Inventors: 孙世利
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-07-04
Filing date: 2002-07-04
Publication date: 2004-01-07

Abstract

The invention is a biasing rotary-wing volume water meter, the biasing rotor, rotor shell and concave wing piece composing the volume measuring room during the running, able to directly and continually measure a certain flow bulk, and realizing the precision of the volume water meter. With the increase of the precision, it reduces the water loss of water-supplying departments and saves the water resource, and effectively prevents the water users stealing by water dropping.

Description

Biased rotary-wing type volume watermeter

Technical field:

Water meter involved in the present invention is the instrument that is used for measuring running water pipe water flow of pipe volume, main a kind of biased rotary-wing type volume watermeter.

Technical background:

China's metering water meter has positive displacement and flow velocity formula two major types at present.Volume watermeter is divided into two kinds of piston and disc types, is the water meter of discharging certain flow volume in the cavity with difform measuring chamber with the direct continuous coverage of different mechanical actions.Flow velocity formula water meter is with current in the pipeline, impacts difform wing wheel, converts rotating speed to, is converted into volume, is a kind of metering method of analog measurement discharge volume.

Volume watermeter has accurate measurement, precision height, advantage that the initiating flow is low, but the part material of measuring room and manufacturing accuracy are required high, complex structure, the manufacturing cost height, tight to the turbidity requirement of water, during the measuring room parts depreciation, error increases, and maintenance difficult, cost of repairs height.Volume watermeter uses extensively abroad.

Though it is simple in structure that the flow velocity water meter has, easily make, cheap, advantage such as easy to maintenance, shortcoming is that measuring accuracy is relatively poor, initiating flow height, the water pressure loss is big, hydraulic pressure is required sternly, when discharge is lower than rated flow 50%, or during maximum flow, error increases, and current are more little, and error is big more.Our common water user is with the method stolen water that drips, and water meter does not change and can't measure.

Content of the present invention

The objective of the invention is relative merits at above-mentioned water meter, the try to please advantage of ponding table and flow velocity water meter, design a kind of volumetric water meter of simple in structure, cheap, easy-maintaining, replace the flow velocity water meter that China generally uses, reduce the damage by water of water supply industry, increase benefit, improve the utilization factor of water resource, bring great social benefit for the country of this water scarcity of China.

The present invention compared with prior art has following characteristics:

1, the measuring chamber volume is little, and a measuring chamber volume of nominal diameter 15mm water meter is .000005m ³

2, hydraulic losses is little, and this water meter is the through type current, and the current of water meter are by area 〉=nominal diameter area, and can be considered hydraulic losses is zero.

3, rotor adopts plastic injection-moulded shaping, and is simple in structure, cheap, and the price of the flow velocity water meter of this water meter and identical nominal diameter is suitable.

4, highly sensitive, the initiating flow is low, presses the initiating flow of water meter C grade standard, and the water meter per minute of nominal diameter 15mm is turn-taked above, has effectively prevented with the method stolen water that drips.

5, precision height.The deflection centrifugal force that produces during the rotor rotation is used spill fin end face to inner walls

(see figure 2) makes spill fin end face be close to inner walls and forms and to be slidingly matched, and the end face of rotor and the gap＜1mm between the housing have guaranteed the precision of measuring chamber.

6, in order to prevent to be partial to the one-way abrasion that water flow pressure causes bearing, adopt the YG wimet to make bearing material, even time high speed rotating (maximum flow), under the cooling and lubricating of water, it is minimum to wear and tear, again non-corrosive.

7, the shape of spill fin uniqueness can compensate the wearing and tearing of spill fin end face automatically, when the length wearing and tearing 8-10% of spill fin does not influence measuring accuracy.

Description of drawings

Fig. 1, structural representation of the present invention

The adjustable top 5-set nut of 1-spill fin 2-rotor 3-spill fin 4-

6-catch bearing 7-rotor case 8-gland 9-locatees cover plate

1-counter engaged wheel 11-magnet 12-water inlet pipe and water outlet pipe 13-counter first transmission shaft

Fig. 2 schematic diagram of the present invention

Fig. 3, additional schematic diagram of the present invention

Fig. 4, rotor profile figure

(1) upward view (2) right view (3) front view (4) left view (5) vertical view (6) rear view

Fig. 5, rotor structure figure

Embodiment

With reference to Fig. 2 (a) be a kind of with rotor case (7), rotor (2), spill fin (1,3) when rotating, can form the inner structure synoptic diagram of measuring chamber structure.The center of circle of rotor case (7) is that the center of circle of O ', rotor (2) is O, and A, A ' are two end points of a slice spill fin, and B, B ' are two end points of another spill fin.There are two to intersect the spill straight trough that is mutually 90 ° on the rotor, are used for installing the spill fin, in rotation, play the guiding role for the spill fin.When the cooperation of rotor by rotor case internal diameter (inwall), make spill fin (hereinafter to be referred as fin) do radially to-and-fro movement along the gathering sill of rotor, formed the measuring chamber that can be used to measure needs.Volume=the sectorial area of measuring chamber * rotor length.Because sectorial area is a variable, degree is an invariant, and the volume of measuring chamber changes with the variation of sectorial area, so we are considered as the variation of sectorial area the variation of measuring chamber volume.Because the center of circle of two circles is not on a round dot, thus the length OA=OB of fin, OB '=OA ', OA＞OA ', OB＞OB '.According to present position, we are called R to four end points correspondences of fin at the locational point of rotor case inwall ₁, R ₂, R ₃, R ₄, the fin correspondence is called r at the locational point of rotor diameter ₁, r ₂, r ₃, r ₄, this moment

R ₃r ₃, R ₂r ₂, between sectorial area (S ₂) the position, be called and reduce the chamber gradually,

R ₃r ₃, R ₄r ₄, between sectorial area (S ₃) the position, be called the minimum chamber position,

R ₄r ₄, R ₁r ₁, between form sectorial area (S ₄) the position, be called and increase the chamber gradually.

R ₁r ₁, R ₂r ₂, between form sectorial area (S ₁) the position, be called the measuring chamber position.Have only any two end points in two fins, corresponding to respectively simultaneously a R ₁, some R ₂In the time of locational, could form measuring chamber.Obtain a measuring chamber during 90 ° of rotor revolutions, whenever turn around (360 °) obtain the four measuring chamber.

See from Fig. 2 (a), if current enter the cavity of rotor case from water inlet, current are under the effect of hydraulic pressure, the chamber of increase gradually water-filling between current direction fin OB ', the OA, current with tangential direction impact that fin A, A ' with O are that the center of circle clockwise rotates, rotor and fin B, B ' also rotate thereupon.

During half-twist, seeing that Fig. 2 (b) fin OA, OB go to from the measuring chamber position reduces the position, chamber gradually, fin OB, OA ' go to the minimum chamber position from reducing the position, chamber gradually, fin OA ', OB ' go to from the minimum chamber position and increase the position, chamber gradually because volume increases water-filling, are full of water between fin OA, the OB ' and go to the measuring chamber position from increasing the position, chamber gradually.Therefore we have obtained the metered volume of first measuring chamber.Because fin moving radially on the rotor gathering sill, the long OB '=OA of fin at this moment, OB=OA ', OA＞OA ', OB '＞OB.

During Rotate 180 °, see Fig. 2 (c): fin OB ', OA go to from the measuring chamber position and reduce the position, chamber gradually, and chamber volume is by reducing greatly gradually, and part water is discharged from freeing port.Fin OA, OB go to minimum chamber from reducing the chamber gradually, fin OB, OA ' are gone to by the minimum chamber position and increase the position, chamber gradually, volume increases water-filling gradually, fin OA ', OB ' are full of water and go to the measuring chamber position from increasing the position, chamber gradually, and we have obtained the metered volume of second measuring chamber, because fin moving radially on the rotor gathering sill, at this moment the length OA ' of fin=OB ', OB=OA, OA '＞OA, OB '＞OB.

When rotating 270 °, see Fig. 2 (d): fin OA ', OB ' go to from the measuring chamber position and reduce the position, chamber gradually, because chamber volume is discharged from freeing port by reducing part water greatly gradually, fin OB ', OA go to the minimum chamber position from reducing the position, chamber gradually, and water is discharged entirely from freeing port because chamber volume diminishes.Fin OB, OA go to from the minimum chamber position and increase the position, chamber gradually, and chamber volume increases water-filling gradually.Fin OB, OA ' are full of water and go to the measuring chamber position from increasing the position, chamber gradually, and at this moment we have obtained the metered volume of the 3rd measuring chamber, because fin moves radially epitrochanterian, at this moment the length OB=OA ' of fin, OA=OB ', OB＞OB ', OA '＞OA.

When rotating 360 °, see Fig. 2 (e), fin OB, OA ' go to from the measuring chamber position and reduce the position, chamber gradually, and the measuring chamber volume diminishes gradually, and part water is discharged from freeing port.Fin OA ', OB ' go to the minimum chamber position from reducing the position, chamber gradually, because chamber volume diminishes gradually, water is discharged entirely from freeing port.Fin OB ', OA go to from the minimum chamber position and increase the position, chamber gradually, and volume increases water-filling gradually.Fin OA, OB are full of water and go to the measuring chamber position from increasing the position, chamber gradually, and we obtain the metered volume of four measuring chamber.Because fin moving radially on the rotor gathering sill, fin length OA=OB at this moment, OA '=OB ', OA＞OA ', OB＞OB '.

Rotation along with rotor, by biasing rotor, rotor case, but the spill fin is formed the measuring chamber of continuous measurement one by one in rotor rotation, the measuring to the process of water delivering orifice from water inlet " transfer " one by one of the current in the cavity with measuring chamber, the accumulative total of continuous coverage is exactly the total amount of flow volume.

In the time of rotor rotation, drive the counter rotation, slow down by the no-load voltage ratio of gear, drive character wheel, obtain the reading of water inventory.

With reference to Fig. 3, when the fin end face was close to the housing internal diameter, we were called H the lap length between the inner face on rotor internal diameter and fin top.The gap of the localization part lower edge of the rotor heart and the inner face of fin bottom is called h, and when the upper end of fin and housing friction produced wearing and tearing, fin length shortened, move on the fin, at this moment h reduces, and H is also along with reducing, along with the wearing and tearing of fin upper end strengthen, h reduces until being zero.When h is zero, H must not＜1.5-2mm, also can gap size artificially be set according to the size and the needs of nominal diameter, prolonged the serviceable life of fin like this, guaranteed the precision of measuring chamber again.Fin adopts metal or nonmetallic wear-resistant material.

Fin length F * rotor length G=watermeter flowing rate between (see figure 3) housing internal diameter and the rotor diameter passes through area.

Reference derives from " water meter millwright rudimentary knowledge ":

Wu shows gradually, and Zhang Zhao writes the publication of Shanghai translation issuing company

ISBN7——80514——686——1/TB·68

Claims

1, a kind of biased rotary-wing type volume watermeter mainly is to be made up of rotor case (7), biasing rotor (2), spill fin (1,3), and it is characterized in that: the center of circle of rotor case (7) and the center of circle of rotor be not on a round dot.There are two to intersect the concavity straight trough that is mutually 90 ° on the rotor, be used for installing matrix fin (1,3), give spill fin (1,3) when rotating, play the guiding role, when rotating, rotor, make spill fin (1,3) on rotor, do radially to-and-fro movement along the gathering sill of rotor by the cooperation of rotor case (7) cavity internal diameter (inwall).Half-twist is formed a volumetric measurement chamber, and composition four measuring chamber when rotate 360 ° is used for directly measuring the volume of water.Current in the water supply pipe tangentially impact fin, promote rotor rotation.Form the continuous coverage chamber during rotor rotation discharge volume is directly measured, continuous coverage result's accumulative total is exactly the total amount of discharge volume.

2, as claim 1 described biased rotary-wing type volume watermeter, when the rotor (2) that it is characterized in that setovering rotates and two intersect the matrix fins (1 that are mutually 90 °, 3) under the cooperation of rotor case (7) internal diameter (inwall), on the gathering sill of rotor, do radially to-and-fro movement, can form the structure and the working method of continuous coverage chamber.