CN2073107U - Flow variable conveyer with scraper - Google Patents
Flow variable conveyer with scraper Download PDFInfo
- Publication number
- CN2073107U CN2073107U CN 90213090 CN90213090U CN2073107U CN 2073107 U CN2073107 U CN 2073107U CN 90213090 CN90213090 CN 90213090 CN 90213090 U CN90213090 U CN 90213090U CN 2073107 U CN2073107 U CN 2073107U
- Authority
- CN
- China
- Prior art keywords
- scraper
- cylinder
- inner cavity
- rotor
- inner chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Landscapes
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
The utility model relates to a flow variable conveyer with scraper, comprising a baffle, a case, a cylindrical rotor, a clean-up scraper, a connecting rod, a spring, etc. The features of the flow variable conveyer with scraper are that the curved face of the case inner cavity is composed of two cylindrical surfaces with different radius and two curved face of particular geometric morphologies, and the function table expression of the formset surface curve is a quadratic function. According to the smoothing of the formset surface curve of the case inner cavity determined by the function, the continuous tangent line at the boundary point position, and the equal distance between each clean-up scraper and the surface contact point of the inner cavity at any position, the stable movement is guaranteed. In addition, the symmetrical Y axis in the inner cavity of the case can make the flow regime of the fluid be consistent before and after entering into the constant volume chamber of the case inner cavity.
Description
The utility model belongs to the flow transmitter of volumeter, particularly the improvement of the flow transmitter inner chamber curved surface of volumetric scraper flow.
Existing scraper-type flow transmitter, its housing inner-cavity structure has two types, and a kind of is that housing inner chamber shape surface curve is round; Another kind is non-circle.For the housing inner chamber shape surface curve of a kind of structure in back, at present, still there is not definite universal expression form, therefore, for the design and the processing of this class shape face, difficulty is bigger, and the pattern design all is difficult to guarantee with crudy.In addition, can not guarantee the continuity of housing inner chamber shape surface curve, thereby influence robust motion.And be unfavorable for producing in serial form to this series products.
The purpose of this utility model provides advanced meanses such as a kind of available computers and numerically-controlled machine, housing inner chamber shape face to its various different sizes accurately designs and precision machined scraper-type flow transmitter, this transmitter housing inner chamber shape surface curve has the optimization mathematical model, it can inherit the advantage of prior art, robust motion and reliability can be guaranteed again, thereby accuracy of instrument can be further improved.
Solution of the present utility model is: housing inner chamber curved surface is made up of the different face of cylinder of two radiuses and the curved surface of two special geometric shapes, wherein, and the face of cylinder of cylindrical rotor is concentric and radius is identical for the roundlet cylinder of inner chamber, and the great circle cylinder of inner chamber and rotor cylinder surface and two scraper plate sides and two ends capping form the constant volume chamber.With the cylindrical rotor center of circle (also being the center of circle of housing inner chamber roundlet cylinder) is initial point, is Y-axis with the vertical axis of symmetry of housing, sets up plane coordinates system, and the function expression of housing inner chamber shape surface curve is:
γ＝Ro （0≤Q≤90°－ (φ)/2 －α
1）……（1）
γ＝Ro＋K
1〔θ－（90－ (φ)/2 －α
1）〕
2
（90°－ (φ)/2 －α
1≤θ≤90°－α）……（2）
γ＝R－K
2［（90＋ (φ)/2 －α
2）－θ］
2
（90°－α≤θ≤90°＋ (φ)/2 －α）……（3）
γ＝R （90＋ (φ)/2 －α
2≤θ≤180）……（4）
Wherein:
α
1＝Sin
－1(b)/(2Ro)
α
2＝Sin
－1(b)/(2R)
In the formula, Ro is a rotor radius, R be the precious shell wall of constant volume to distance of shaft centers from, b is a scraper thickness, φ is the cornerite of two special geometric shape surface curves, its value is advisable at 70 °-90 °.Ro, R, the b all flowmeter according to different size are given.Model specification is certain, and Ro, R, b, φ are respectively given constant.
By kinematics and kinetic theory analysis, by making prototype test and verification, the flow transmitter that housing inner chamber shape surface curve satisfies above-mentioned mathematical function expression formula can satisfy following specific (special) requirements.
1. housing inner chamber shape surface curve is level and smooth, and at boundary position, its tangent line is continuous;
2. in any position, every pair of scraper plate equates with inner cavity surface contact point distance, to guarantee that motion steadily;
3. housing inner chamber symmetry y axle distributes, and the fluidised form that enters the fluid zone of transition before and after the constant volume chamber behind the housing inner chamber is consistent, and strengthens robust motion.
Thereby realized purpose of the present invention.
Specific structural details of the present utility model is provided by accompanying drawing.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the a-a cut-open view of Fig. 1.
Fig. 3 is a housing inner chamber shape surface curve synoptic diagram.
As shown in drawings, (A) being conducting element, (B) is flow sensor.Flow sensor is made up of housing (1), cylindrical rotor (2), scraper plate (3), spring (4), connecting rod (5), four uniform groovings are arranged on the circumference of described cylindrical rotor, and pilot hole is arranged with the grooving radial communication, by connecting rod (5) that places pilot hole and can in this hole, slide and the spring (4) that is loaded on the connecting rod top scraper plate (3) is loaded in the grooving, and keeps scraper plate to contact with the housing inner cavity surface.1.-4. the shape surface curve (6) of described housing inner chamber satisfies the aforementioned functions expression formula, and is symmetrical in the y axle.Provided an embodiment of this shape surface curve as accompanying drawing 3.In this embodiment, φ is 80 °, (50-α
1), (90 °-α), (130 °-α
2), (230 °+α
2), (270 °+α), (310 °+α
1) locate to be respectively flex point.Shown in accompanying drawing 1, be in the great circle cylinder of R the time as the radius that two scraper plates are in shell inner cavity simultaneously, this great circle cylindrical inner wall and rotor (2) cylindrical wall and two scraper plate sides, the close room of envelope that the two ends capping forms just is constant volume chamber (7).Conducting element of the present utility model (A) also can be as a whole with housing (1).
The course of work of the present utility model is: fluid is after the inlet of baffle (A) enters the inner chamber of housing (1), drive scraper plate, the rotation of drive rotor, thereby the fluid that enters in the housing inner chamber is discharged from the endpiece of conducting element (A), rotor whenever circles, and just has the fluid of the precious volume of four times of constant volumes to discharge.Driving sender unit by armature spindle (8) sends flow signal.
Claims (3)
1, a kind of scraper-type flow transmitter, form by conducting element A and flow sensor B two parts, flow sensor B comprises housing (1), cylindrical rotor (2), scraper plate (3), spring (4), connecting rod (5), the face of cylinder that the inner chamber curved surface that is characterised in that described housing (1) of the present utility model is not waited by two radiuses and the curved surface of two special geometric shapes are formed, form the roundlet cylinder of inner chamber curved surface and the face of cylinder of rotor (2), concentric and radius equates great circle cylinder and rotor cylinder surface, two scraper plate sides and two ends capping constitute the constant volume chamber, whole shape surface curve (6) is with the y rotational symmetry, and its function expression is:
r=R
0(0≤O≤90° (Φ)/2 -α
1)……(1)
r=R
0+K
1[θ-(90- (Φ)/2 -α
1)]
2
(90°- (Φ)/2 -α
1≤θ≤90°-α)……(2)
r=R-K
2｜(90+ (Φ)/2 -α
2)-θ｜
2
(90-α≤θ≤90°+ (Φ)/2 -α)……(3)
r=R (90°+ (Φ)/2 -α
2≤θ≤180°)……(4)
Wherein:
R
0Identical with rotor radius, R be constant volume chamber shell wall to distance of shaft centers from, b is a scraper thickness, their value is according to different size model exactness.
2, scraper-type flow transmitter according to claim 1 is characterized in that aforesaid φ value is 70 °-90 °.
3, scraper-type flow transmitter according to claim 2 is characterized in that aforesaid conducting element A and housing (1) can be an integral body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90213090 CN2073107U (en) | 1990-06-30 | 1990-06-30 | Flow variable conveyer with scraper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90213090 CN2073107U (en) | 1990-06-30 | 1990-06-30 | Flow variable conveyer with scraper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2073107U true CN2073107U (en) | 1991-03-13 |
Family
ID=4892583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90213090 Withdrawn CN2073107U (en) | 1990-06-30 | 1990-06-30 | Flow variable conveyer with scraper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2073107U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103697959A (en) * | 2013-12-25 | 2014-04-02 | 三正集团股份有限公司 | Elastic telescopic scraper flow meter |
| CN109762683A (en) * | 2019-02-28 | 2019-05-17 | 宁波乐惠国际工程装备股份有限公司 | Scraper plate and lautertuns comprising the scraper plate |
-
1990
- 1990-06-30 CN CN 90213090 patent/CN2073107U/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103697959A (en) * | 2013-12-25 | 2014-04-02 | 三正集团股份有限公司 | Elastic telescopic scraper flow meter |
| CN109762683A (en) * | 2019-02-28 | 2019-05-17 | 宁波乐惠国际工程装备股份有限公司 | Scraper plate and lautertuns comprising the scraper plate |
| CN109762683B (en) * | 2019-02-28 | 2024-02-13 | 宁波乐惠国际工程装备股份有限公司 | Scraper and filter tank comprising same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |