CN206546188U - A kind of high-precision pointer spinner flowmeter - Google Patents

Abstract

The utility model discloses the high-precision pointer spinner flowmeter of one kind, including conical pipe, it is arranged on the sensing unit in conical pipe, the upper and lower ends of the conical pipe have and measured the relative port connect of pipeline, upper and lower ends are respectively equipped with guide pipe and lower guide pipe in conical pipe, the sensing unit includes rotor, it is arranged on the upper guide rod of both sides and lower guide rod above and below rotor, the upper guide rod and lower guide rod are plugged in guide pipe and lower guide pipe respectively, the madial wall of the conical pipe is provided with up big and down small active side wall, the axial cross section of the active side wall is parabola.The utility model can make to keep linear relationship between the scale and flow of the dial of display device, so that the interval holding of scale is uniform, be conducive to the accurate reading and output of flow value.

Description

A kind of high-precision pointer spinner flowmeter

Technical field

The utility model is related to a kind of flowmeter for being used to measure fluid flow, more particularly, to a kind of high-precision pointer Formula spinner flowmeter.

Background technology

Suspended body flowmeter is also referred to as spinner flowmeter, including conical pipe and be placed in conical pipe and can along pipe center line The sensing unit freely up and down moved, the madial wall of conical pipe has the work of one section of turbination gradually expanded from bottom to top Upper and lower ends are respectively equipped with guide pipe in side wall, conical pipe, correspondingly, and sensing unit includes rotor, is arranged on two above and below rotor The guide rod of both sides constitutes with the guide pipe of conical pipe upper and lower ends be slidably connected respectively above and below the guide rod of side, rotor, so that It can ensure that rotor is centered about, uniform gap formed between rotor and the active side wall of conical pipe turbination.Work as measurement During the flow of fluid, detected fluid is flowed into from conical pipe lower end, and the impact flow of fluid rotor, and produces one upwards to it Active force, the size of this power changes with fluid flow size.When flow is sufficiently large, produced active force is by rotor Hold up, and be allowed to raise.Meanwhile, detected fluid flows through the annular section between rotor and taper tube wall, from upper end outflow.When tested To the active force of rotor during flow of fluid, when being exactly equal to the weight of rotor in a fluid, rotor stress be in poised state and A certain height is rested on, rotor transmits signal by magnetic coupling, makes the pointer in corresponding display device in pointer flowmeter Rotate, dial can show corresponding fluid flow.

It is known that the cross-sectional area that flow=flow velocity × fluid of fluid is passed through, that is to say, that flowed in conical pipe The flow of body=（The corresponding rate of flow of fluid in rotor position）×（Active side wall rotor position cross-sectional area- The cross-sectional area of rotor）, and fluid is related to the active force of rotor and the flow velocity of fluid, therefore, when the flow of fluid becomes big When, the flow velocity increase of the fluid of same position on conical pipe, active force increase suffered by rotor and rise, it is now highly right with this The sectional area for the conical pipe answered becomes big, and flow velocity then remains unchanged, so that the active force suffered by rotor is constant and keeps balance State.Because the cross-sectional area of rotor is constant, and the cross-sectional area of conical pipe active side wall and radius square into just Than, and the conical pipe active side wall of turbination radius and height be directly proportional, therefore, the cross section of conical pipe active side wall Height residing for area and rotor square is directly proportional.That is, the lifting value and the size non-linear relation of flow of rotor. So, it is also non-linear relation to cause between the rotational angle and flow of the pointer in display device, correspondingly, in display device Dial on scale be also non-linear increasing.That is, when flow indicating value gradually increases, the scale on dial The interval of line, which can be tapered into, becomes close, so as to cause the reading of flow indicating value difficult, and then has influence on the flow of flowmeter output It is worth precision.

Utility model content

The purpose of this utility model is stranded to solve the flow value reading present in existing pointer spinner flowmeter Difficulty, the problem of flow value precision of output is low can make the quarter of display device there is provided the high-precision pointer spinner flowmeter of one kind Linear relationship is kept between the scale and flow of scale, so that the interval holding of scale is uniform, is conducive to the accurate of flow value Read and export.

To achieve these goals, the utility model uses following technical scheme：

A kind of high-precision pointer spinner flowmeter, including conical pipe, the sensing unit that is arranged in conical pipe, it is described The upper and lower ends of conical pipe have and measure in the relative port connect of pipeline, conical pipe upper and lower ends be respectively equipped with guide pipe and Lower guide pipe, the sensing unit includes rotor, is arranged on the upper guide rod of both sides and lower guide rod above and below rotor, it is described on lead It is plugged in respectively in upper guide pipe and lower guide pipe to bar and lower guide rod, the madial wall of the conical pipe is provided with up big and down small Active side wall, the axial cross section of the active side wall is parabola.

With unlike prior art, the axial cross section of active side wall of the present utility model is parabola, therefore, conical pipe The height of active side wall and radius square are directly proportional, and the cross-sectional area of active side wall and radius square are directly proportional, That is, the cross-sectional area of active side wall and the height of active side wall are directly proportional, so, the lifting value of rotor and flow it is big It is small linear, and then it is also linear relationship to make between the rotational angle and flow of pointer in display device.That is, The spacing between scale on dial can keep uniformity, so as to be conducive to the accurate reading and output of flow value.

Preferably, the conical pipe include middle taper base tube and be fixed in taper base tube upper and lower ends be used for and The adpting flange of signal piping docking, the ratio between the thickest and minimum wall thickness (MINI W.) of the taper base tube are between 1-1.1.

Because conical pipe of the prior art is made up of machining mode, therefore, the lateral wall of conical pipe into Cylinder, so that the wall unevenness of conical pipe is even, both waste of materials, increased weight, while the machining of endoporus is difficult, essence Degree is difficult to ensure.Conical pipe of the present utility model includes the taper base tube of centre and the adpting flange of upper and lower ends, therefore, taper Base tube can readily obtain the active side wall of parabolic shape with stainless steel tube by extrusion forming process, so that taper base tube Thickness keeps basically identical, not only improves the processing and manufacturing of conical pipe, the waste of material can be reduced again.

Preferably, the adpting flange of taper base tube upper end upper surface and lower end adpting flange lower surface on point Not She You positioning counterbore, annular slot is provided with the madial wall of positioning counterbore, is respectively equipped with the positioning counterbore of upper and lower ends Annular stent, the upper and lower guide pipe is integrally attached on the annular stent of correspondence side by connecting pole respectively, Provided with the hole back-up ring for compressing annular stent in the annular slot of the positioning counterbore.

Because upper and lower guide pipe is integrally attached on the annular stent of correspondence side by connecting pole respectively, because This had both facilitated the manufacture and installation of upper and lower guide pipe, while being easy to the flowing of taper tube fluid.Particularly, hole back-up ring can Make annular stent reliable location, so as to limit the axial location of upper and lower guide pipe, upper and lower guide pipe is played restriction and turn The effect of sub- lifting travel.

Preferably, the madial wall of the conical pipe also includes the cylindrical wait being connected with the small end of active side wall Section, the cylindrical steady flow segment that is connected with the big end of active side wall, the ratio between the axial length and internal diameter of the wait section exist Between 0.17-0.19, the ratio between axial length and internal diameter of the steady flow segment are between 0.16-0.18.

When conical pipe is in blank pipe or fluid remains static, rotor is in the lower position for waiting section；Work as taper When flow reaches minimum measurable flow amount in pipe, rotor is risen by the active force of fluid, and the madial wall due to conical pipe is being waited It is cylinder to treat section, and therefore, the rising of rotor can't reduce the active force of fluid, and rotor can rise to parabolic shape always Work sidewall sections, so that the indicators turn of display device, and shows on dial the flow of fluid.The utility model The axial length dimension of section is waited by reasonably setting, pointer scale RP points can be made（Rotor minimum point）With Qmin points（It is minimum Measurement point）Between spacing increase, so as to be conducive to improving the resolution ratio of Qmin points measurement.In addition, when the flow of fluid reaches During greatest measurement, due to the utility model there is provided larger steady flow segment, can avoid the occurrence of the critical flex point of measurement, be conducive to carrying High measurement stability.

It is located at preferably, the active side wall is located on the middle part of taper base tube, the taper base tube on active side wall The spout diameter of lower both sides is identical, and the steady flow segment for the sidewall upper that works passes through the pipe on the upside of the changeover portion and taper base tube of cone Mouth is connected, and the wait section for the side wall lower ends that work is connected by the changeover portion of cone with the mouth of pipe on the downside of taper base tube.

Because the spout diameter for being located at both sides above and below active side wall on taper base tube is identical, therefore, we can use internal diameter The work of centre is processed by way of extrusion forming with the spout diameter identical stainless steel tube of both sides above and below active side wall Sidewall sections, so as to reduce the waste of material, and reduce the allowance of extrusion forming.The changeover portion of cone, which is not only improved, to be carried The intensity of high conical pipe, facilitates it to process, while the turbulent flow produced during flow of fluid in conical pipe can be reduced.

Preferably, two radial direction through hole for intersecting 90 degree are respectively equipped with the upper and lower guide rod, and two footpaths Misplaced arrangement in the axial direction to through hole, and the slide post that glass is made is fitted with the radial direction through hole, and the slide post stretches out footpath Hemispherical contact jaw is respectively equipped with to the two ends of through hole.

Because the slide post that glass is made has high hardness and minimum thermal coefficient of expansion, therefore, we can make, Lower guide rod forms the larger cooperation in gap with upper and lower guide pipe respectively, reduces the requirement to machining accuracy.Particularly, two Slide post intersects 90 degree, and the two ends of slide post are hemispherical contact jaw, thus makes upper and lower guide rod in X, Y two Direction obtains reliable location, and then can ensure that upper and lower guide rod forms uniform gap with upper and lower guide pipe, and can be notable Ground reduces the contact area of upper and lower guide rod and upper and lower guide pipe, to avoid clamping stagnation occur because of the change of temperature.

Preferably, the upper end of the upper guide pipe, which is provided with plug, the upper guide rod, is additionally provided with damping ring, damping ring Periphery be provided with spiral helicine amortisseur bar.

Amortisseur bar can make to form less gap between guide rod and upper guide sleeve, so, when fluid especially gas Instability of flow and in a short time quick change when, because the upper end of upper guide pipe is provided with plug, so that upper guide pipe The structure of similar cylinder is formed between upper guide rod, rotor is when oscilaltion is floated, and the fluid in upper guide pipe can pass through Tiny gap between rotor and upper guide pipe discharges and entered, so that a kind of damping action is formed, effectively to delay The lifting frequency and speed of rotor are solved, the flow value of display is kept stable.Particularly, when fluid flow quickly change so as to When causing the guide rod to be lifted in upper guide pipe, fluid can flow through the gap between guide pipe and upper guide rod, now flow The active force that a circumferencial direction is produced to spiral helicine amortisseur bar is known from experience, so that upper guide rod is being lifted together with rotor While rotate, and then be conducive to the reliable and stable lifting of rotor, it is to avoid stuck phenomenon occur.

Therefore, the utility model has the advantages that：It can make between the scale and flow of the dial of display device Linear relationship is kept, so that the interval holding of scale is uniform, is conducive to the accurate reading and output of flow value.

Brief description of the drawings

Fig. 1 is a kind of structural representation of the present utility model.

Fig. 2 is another structural representation of the present utility model.

Fig. 3 is the enlarged drawing at A in Fig. 2.

In figure：1st, conical pipe 11, adpting flange 111, port 112, positioning counterbore 12, taper base tube 121, work Side wall 122, wait section 123, steady flow segment 124, changeover portion 2, sensing unit 21, rotor 22, upper guide rod 221, damping Ring 222, amortisseur bar 23, lower guide rod 3, upper guide pipe 31, annular stent 32, radial pins 33, slide post 331, Contact jaw 34, plug 4, lower guide pipe.

Embodiment

The utility model is further described with embodiment below in conjunction with the accompanying drawings.

As shown in figure 1, a kind of high-precision pointer spinner flowmeter, it needs to be vertically mounted on measurement pipeline, Specifically include conical pipe 1, the sensing unit being arranged in conical pipe 2, the upper and lower ends of conical pipe have and to measure pipeline relative Upper and lower ends vertically set upper guide pipe 3 and lower guide pipe 4, the madial wall of conical pipe respectively in the port 111 connect, conical pipe It is upper that up big and down small active side wall 121 is set, and the axial cross section of active side wall is parabola.Sensing unit includes rotor 21st, the upper guide rod 22 of both sides and lower guide rod 23 above and below rotor are arranged on, upper guide rod is plugged in guide pipe, it is lower to be oriented to Bar is then plugged in lower guide pipe.Certainly, we also need to set corresponding magnetic induction part in the outside of conical pipe and referred to Pin type or digital flow display device.When the fluid matasomatism in conical pipe is on rotor, rotor is set to rest on conical pipe Some height and position, magnetic induction part senses the height and position of rotor, so that corresponding electric signal is exported, finally in display dress Corresponding flow value can be shown by putting.Because spinner flowmeter belongs to prior art, therefore, to magnetic induction in the present embodiment Element, display device etc. do not do specific description.

Because the axial cross section of active side wall is parabola, therefore, the height of conical pipe active side wall and active side wall Radius square is directly proportional, and the cross-sectional area of active side wall and radius square are directly proportional, that is to say, that active side wall The height of cross-sectional area and active side wall is directly proportional, so, and the lifting value of rotor and the size of flow are that may make up linear pass System, and then it is also linear relationship to make between the rotational angle and flow of pointer in display device.That is, on dial Spacing between scale can keep uniformity, so as to be conducive to the accurate reading and output of flow value.

Processing for the ease of conical pipe and the waste for reducing material, conical pipe include middle taper base tube 12 and weldering Be connected on taper base tube upper and lower ends be used for and signal piping docking adpting flange 11, port therein be separately positioned on above and below two On the adpting flange at end.So, taper base tube by extrusion forming process can readily obtain parabolic shape with stainless steel tube Active side wall, so that the ratio between thickest and minimum wall thickness (MINI W.) of taper base tube are maintained between 1-1.1, not only improves conical pipe Processing and manufacturing, the waste of material can be reduced again.In addition, active side wall should be located at the middle part of taper base tube, and taper base tube The upper spout diameter positioned at both sides above and below active side wall is identical.So, we can be using both sides above and below internal diameter and active side wall Spout diameter identical stainless steel tube processes the work sidewall sections of centre by way of extrusion forming, so as to reduce material Waste, and reduce the processing capacity of extrusion forming.

For the ease of the installation of upper guide pipe and lower guide pipe, we can be in the upper end of the adpting flange of taper base tube upper end Positioning counterbore 112 is set respectively on the lower surface of the adpting flange of face and lower end, ring is set on the madial wall of positioning counterbore Annular stent 31 is set respectively in shape neck, the positioning counterbore of upper and lower ends, and upper guide pipe is uniform in circumferencial direction by 6 The radial pins 32 of distribution are integrally attached on the annular stent of upper end, and lower guide pipe is then equal in circumferencial direction by 6 The radial pins of even distribution are integrally attached on the annular stent of lower end, and are set and supported in the annular slot of positioning counterbore The hole back-up ring 113 of annular stent is pressed, so that annular stent reliable location, and limit the axial position of upper and lower guide pipe Put.So, in assembling, upper guide pipe first can be arranged in conical pipe by we by annular stent, and be positioned with one Hole in counterbore is positioned with back-up ring.Then rotor is loaded in conical pipe, and made in the upper guide pipe of guide rod insertion.Then will Lower guide pipe is arranged on by annular stent at the positioning counterbore of lower end, and the lower guide rod on rotor then enters lower guide pipe It is interior, then position the annular stent on lower guide pipe with the hole back-up ring in a positioning counterbore, so as to complete assembling.

In addition, we can also set one section of cylinder being connected with the small end of active side wall on the madial wall of conical pipe Wait section 122, while set on the madial wall of conical pipe one section be connected with the big end of active side wall it is cylindrical steady Section 123 is flowed, the axial length of section is waited（I.e. highly）The ratio between internal diameter with waiting section is between 0.17-0.19, and its preferred value is 0.18；The axial length of steady flow segment（I.e. highly）With the ratio between the internal diameter of steady flow segment between 0.16-0.18, its preferred value is 0.17.So, when conical pipe is in blank pipe or fluid remains static, lower guide pipe makes, limited the axial direction of lower guide rod Position, rotor now is in the lower position for waiting section；When flow reaches minimum measurable flow amount in conical pipe, rotor by The active force of fluid and rise, due to conical pipe madial wall wait section for cylinder, therefore, the rising of rotor can't subtract The active force of small fluid, rotor can rise to the work sidewall sections of parabolic shape always, so that the pointer of display device turns It is dynamic, and show on dial the flow of fluid.The utility model waits the axial length dimension of section by reasonably setting, Pointer scale RP points can be made（Rotor minimum point）With Qmin points（Minimum measurement point）Between spacing increase so that be conducive to improve The resolution ratio of Qmin points measurement.In addition, when the flow of fluid reaches greatest measurement, due to the utility model there is provided larger Steady flow segment, the critical flex point of measurement can be avoided the occurrence of, be conducive to improving measurement stability.

In addition, the steady flow segment of work sidewall upper can be by the mouth of pipe on the upside of the changeover portion 124 and taper base tube of cone It is connected, the wait Duan Ze for the side wall lower ends that work is connected by the changeover portion of cone with the mouth of pipe on the downside of taper base tube, from And be conducive to improving the intensity of conical pipe, convenient processing, while the turbulent flow produced during flow of fluid in conical pipe can be reduced.

In order that rotor can be lifted reliably, as shown in Figure 2 and Figure 3, we can also set two to intersect on upper guide rod Into 90 degree of radial direction through hole, and two radial direction through hole misplace arrangement in the axial direction；Similarly, two are set on lower guide rod Intersect 90 degree of radial direction through hole, and two radial direction through hole misplace arrangement in the axial direction.It is fitted with each radial direction through hole Radial direction through hole is stretched out at the slide post 33 that glass is made, the two ends of slide post respectively, and slide post stretches out the two ends of radial direction through hole Hemispherical contact jaw 331 is set respectively, so that slide post can connect with the madial wall formation point of upper guide pipe or lower guide pipe Touch.Certainly, we can make upper and lower guide rod respectively with the larger cooperation in formation gap of upper and lower guide pipe, two on upper guide rod Root slide post can make X, Y both direction of the guide rod in upper guide pipe obtain reliable location so that upper guide rod with it is upper Uniform gap is formed between guide pipe, and reduces contact area therebetween, it is to avoid is occurred during flow temperature change stuck Phenomenon.With this similarly, two slide posts on lower guide rod can obtain X, Y both direction of the lower guide rod in lower guide pipe Reliable location, so that uniform gap is formed between lower guide rod and lower guide pipe, and the contact area of reduction therebetween, Avoid stuck phenomenon occur during fluid temperature variations.

Further, we can also set a sealed plug 34 in the upper end of upper guide pipe, so that upper guide pipe Formed on the housing structure of similar cylinder, and the setting damping ring 221 on upper guide rod, the periphery of damping ring and spiral is set The amortisseur bar 222 of shape, sets less fit clearance between amortisseur bar and upper guide pipe, upper guide rod now is to be formed to lead Piston rod into pipe.When the instability of flow of fluid especially gas quickly changes in a short time rotor is increased, Fluid in upper guide pipe be squeezed can by the tiny gap between the amortisseur bar on upper guide pipe and upper guide pipe to Outer discharge, so as to form a kind of damping action, effectively to alleviate the rising frequency and speed of rotor, and then shows display device The flow value shown keeps stable；Analogously, when rotor declines, the fluid formation in upper guide pipe vacuumizes effect, now Outside fluid can be entered in upper guide pipe by the tiny gap between the amortisseur bar on upper guide pipe and upper guide pipe, from And a kind of damping action is formed, effectively to alleviate the droping frequency and speed of rotor, and then the flow for showing display device Value keeps stable.Particularly, when upper guide rod is lifted in upper guide pipe, fluid can be flowed through between guide pipe and amortisseur bar Gap, now fluid can to spiral helicine amortisseur bar produce a circumferencial direction active force so that upper guide rod together with Rotor is rotated while lifting together, and then is conducive to the reliable and stable lifting of rotor, it is to avoid stuck phenomenon occur.

Claims (7)

1. a kind of high-precision pointer spinner flowmeter, including conical pipe, the sensing unit that is arranged in conical pipe, the cone The upper and lower ends of shape pipe have and measured upper and lower ends in the relative port connect of pipeline, conical pipe to be respectively equipped with guide pipe with Guide pipe, the sensing unit includes rotor, is arranged on the upper guide rod of both sides and lower guide rod above and below rotor, the upper guiding Bar and lower guide rod are plugged in guide pipe and lower guide pipe respectively, it is characterized in that, the madial wall of the conical pipe is provided with Up big and down small active side wall, the axial cross section of the active side wall is parabola.

2. the high-precision pointer spinner flowmeter of one kind according to claim 1, it is characterized in that, the conical pipe includes Middle taper base tube and be fixed in taper base tube upper and lower ends be used for and signal piping docking adpting flange, the taper The ratio between thickest and minimum wall thickness (MINI W.) of base tube are between 1-1.1.

3. the high-precision pointer spinner flowmeter of one kind according to claim 2, it is characterized in that, taper base tube upper end Positioning counterbore is respectively equipped with the upper surface of adpting flange and the lower surface of the adpting flange of lower end, in the inner side of positioning counterbore Wall is provided with annular slot, the positioning counterbore of upper and lower ends and is respectively equipped with annular stent, and the upper and lower guide pipe leads to respectively Cross connection pole to be integrally attached on the annular stent of correspondence side, be provided with and compress in the annular slot of the positioning counterbore The hole back-up ring of annular stent.

4. a kind of high-precision pointer spinner flowmeter according to claim 1 or 2 or 3, it is characterized in that, the taper Cylindrical wait section that the madial wall of pipe also includes being connected with the small end of active side wall, it is connected with the big end of active side wall Cylindrical steady flow segment, the ratio between the axial length and internal diameter of wait section are between 0.17-0.19, the axle of the steady flow segment To the ratio between length and internal diameter between 0.16-0.18.

5. the high-precision pointer spinner flowmeter of one kind according to claim 4, it is characterized in that, the active side wall position It is identical in the spout diameter for being located at both sides above and below active side wall on the middle part of taper base tube, the taper base tube, on active side wall The steady flow segment at end is connected by the changeover portion of cone with the mouth of pipe on the upside of taper base tube, and the wait section for the side wall lower ends that work is logical The changeover portion for crossing cone is connected with the mouth of pipe on the downside of taper base tube.

6. a kind of high-precision pointer spinner flowmeter according to claim 1 or 2 or 3, it is characterized in that, it is described it is upper, It is respectively equipped with two radial direction through hole for intersecting 90 degree on lower guide rod, and two radial direction through hole misplace arrangement in the axial direction, The slide post that glass is made is fitted with the radial direction through hole, the two ends that the slide post stretches out radial direction through hole are respectively equipped with hemisphere The contact jaw in face.

7. a kind of high-precision pointer spinner flowmeter according to claim 1 or 2 or 3, it is characterized in that, it is described on lead It is provided with to the upper end of pipe on plug, the upper guide rod and is additionally provided with damping ring, the periphery of damping ring is provided with spiral helicine resistance Buddhist nun's bar.