CN104677432A - Magnetostrictive displacement sensing flowmeter and flow measuring method - Google Patents
Magnetostrictive displacement sensing flowmeter and flow measuring method Download PDFInfo
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- CN104677432A CN104677432A CN201410070366.6A CN201410070366A CN104677432A CN 104677432 A CN104677432 A CN 104677432A CN 201410070366 A CN201410070366 A CN 201410070366A CN 104677432 A CN104677432 A CN 104677432A
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Abstract
The invention relates to a magnetostrictive displacement sensing flowmeter. The magnetostrictive displacement sensing flowmeter comprises a sensor electronic bin, a transitional joint, a groove cover, an overflow groove, a metering barrel, a valve block, a damping washer, a straight joint, a measuring wave guide tube and a magnetic ring buoy. The magnetic ring buoy is driven to move in the up-down direction by change of the liquid level of leakage oil, a magnetostrictive effect of a magnetostriction material is achieved, the measuring wave guide tube deforms elastically so that a mechanical wave which is expanded towards two sides is generated, the mechanical wave is received by the sensor electronic bin which is connected with the upper end of the measuring wave guide tube and is converted into an electric signal, and the volume flow of the leakage oil is calculated by comparison and conversion. Owing to the magnetostrictive effect, the magnetostriction property of the magnetostrictive displacement sensing flowmeter is not changed along with time. The magnetostrictive displacement sensing flowmeter has the advantages of high stability, high reliability, high response speed, high resolution precision, non-contact measurement, zero abrasion, long service life and the like. Moreover, the magnetostrictive displacement sensing flowmeter is particularly suitable for measuring micro flow.
Description
Technical field
The present invention relates to a kind of flow detection utensil and flow-measuring method, particularly relate to that a kind of fast response time, resolving accuracy are high, non-cpntact measurement, without the flowmeter for small amount of flow measuring of wearing and tearing, long service life and flow-measuring method.
Background technology
In hydraulic engineering, the measurement of tiny flow quantity is the technical barrier of puzzlement Hydraulic Industry always.Although constantly have novel delicate flow to measure test components and parts both at home and abroad to come out, the measurement of the direct contact of its use procedure has strict pollutional equivalent amount requirement to use medium.Any pollution of medium all can cause error in dipping or the inefficacy of flowmeter, serviceable life is short, maintenance cost is high, special in Hydraulic Elements delivery test, the internal leakage of Hydraulic Elements is as trying index, when internal leakage performance assessment criteria just becomes a difficult problem for factory in the metering of milliliter timing tiny flow quantity, usually just measure by artificial visual observations oil number of drops, time and effort consuming, cannot realize automatic control, the internal leakage that these problems impel people constantly to explore improvement component test process detects gauging instrument and test method automatically.
Summary of the invention
For the problems referred to above, fundamental purpose of the present invention is to provide that a kind of fast response time, resolving accuracy are high, non-cpntact measurement, without the flowmeter for small amount of flow measuring of wearing and tearing, long service life and flow-measuring method.
The present invention solves above-mentioned technical matters by following technical proposals:
A kind of magnetostrictive displacement sensing flow meter, comprise sensor electronic storehouse, crossover sub, groove lid, overflow groove, batch box, valve block, damping washer, straight coupling, measuring wave guide, magnet ring floating drum, described measuring wave guide is circular magnetostriction materials, copper conductor is equipped with in inside, the lower end of described measuring wave guide is connected with described damping washer, the upper end of described measuring wave guide is connected with described sensor electronic storehouse, described magnet ring floating drum is freely movably sleeved on described measuring wave guide, described measuring wave guide is arranged on by described damping washer in the mounting hole of described valve block central authorities simultaneously, described batch box is set with in the outside of described magnet ring floating drum and described measuring wave guide, described overflow groove is set with in the outside of described batch box, the lower end of described overflow groove and batch box is arranged on valve block, and described overflow groove, the upper end of batch box and measuring wave guide is arranged on described groove and covers, described sensor electronic storehouse is also arranged on groove by described crossover sub and covers, the air hole having and be in communication with the outside is covered at described groove.
In a preferred embodiment of the present invention, described valve block is provided with metering oil-in, metered oil outlet, inlet restriction, batch box inlet restriction, central authorities' mounting hole, overflow slotted eye, wherein said metering oil-in, inlet restriction and central mounting hole site are in the central authorities of described valve block, and be coaxially communicated with successively, described batch box inlet restriction is distributed on the step surface of described central mounting hole bottom, described metered oil outlet is positioned at the side of valve block, and it is through with described central mounting hole, and described overflow slotted eye is positioned at the upper surface of described valve block, and it is mutually through with described metered oil outlet.
In a preferred embodiment of the present invention, described measuring wave guide material is stainless steel material.
In a preferred embodiment of the present invention, described batch box inlet restriction is provided with 3-12.
In a preferred embodiment of the present invention, be also provided with run-down pipe in the annular space between described overflow groove and batch box, described run-down pipe is arranged in the described overflow slotted eye of valve block.
In a preferred embodiment of the present invention, be also provided with anti-overflow cover in the upper end of described batch box.
In a preferred embodiment of the present invention, the top circumferential wall of described batch box has spout hole.
In a preferred embodiment of the present invention, described overflow groove is arranged on described valve block by screw.
In a preferred embodiment of the present invention, described overflow groove, installs O-ring seal between batch box and described valve block respectively.
In a preferred embodiment of the present invention, described valve block is also provided with solenoid valve, described solenoid valve 2/2-way solenoid valve, and described solenoid valve port is connected with metered oil outlet.
In a preferred embodiment of the present invention, the entrance and exit of the normal off path in described solenoid valve is provided with the contrary retaining valve of conducting direction.
Utilize above-mentioned magnetostrictive displacement sensing flow meter to carry out a method for flow measurement, concrete grammar comprises the steps:
(1), tested valve Leakage Energy entrance is connected to the inlet end of a retaining valve, and the endpiece of retaining valve and the metering oil-in on described valve block are connected by pipeline with a port of described solenoid valve, and described metered oil outlet is connected with fuel tank after being connected with another port of described solenoid valve;
(2) start the oil pump that is connected with tested valve, flow through inlet restriction again after the Leakage Energy of tested valve flows through retaining valve and batch box inlet restriction enters batch box;
(3) magnet ring floating drum raises along with the liquid level in batch box and raises, magnetic field superposition in the motion of the ring-shaped magnet in magnet ring floating drum and measuring wave guide produces magnetostriction effect, make measuring wave guide produce elastic deformation and produce a mechanical wave to both sides expansion therefrom, this mechanical wave is received by the sensor electronic storehouse be connected with measuring wave guide upper end, and is converted to electric signal;
(4) by measuring the transmission time of electric signal, the time of place to sensor electronic storehouse can be produced by precision determination ripple, thus determine the distance of magnet ring floating drum with liquid surface lifting, be multiplied by the sectional area between batch box and measuring wave guide by distance, accurately record the volume flow entering batch box.
(5) when the initial zero setting of needs, the Leakage Energy entrance of tested element is connected with metering oil-in of the present invention, start oil pump, leak the metering oil-in of fluid on valve block, inlet restriction and batch box inlet restriction flow into batch box, when the fluid in batch box is filled, the spout hole of fluid through batch box top is spilled over to overflow groove automatically, when the fluid overflowed reaches run-down pipe height, leak fluid and flow back to fuel tank through run-down pipe, before each measurement, close oil pump, open solenoid valve, fluid in batch box is linked up through solenoid valve and overflow groove, fluid in batch box flows into overflow groove through solenoid valve, the fluid of overflow groove flows back to fuel tank through run-down pipe, liquid level is only freely down to run-down pipe liquid level, the height of magnet ring floating drum in batch box is in the initial position of measurement, this liquid level can be used as measurement starting point, and the display of the current potential of registering instrument is set to zero-bit.
The advantage that the present invention compared with prior art has and good effect concrete manifestation be in the following areas: the present invention drives magnet ring floating drum to move up and down by utilizing the change of Leakage Energy liquid level, cause the magnetostrictive effect of magnetostriction materials, make measuring wave guide produce elastic deformation and produce a mechanical wave to both sides expansion therefrom, this mechanical wave is received by the sensor electronic storehouse be connected with measuring wave guide upper end, and be converted to electric signal, through comparing and changing the volume flow calculating Leakage Energy, because its magnetostriction of magnetostrictive effect does not change in time, thus application the present invention and method thereof carry out flow measurement good stability, reliability is high, in measuring process, automatically can intercept one section of Δ t in linear measuring signal and zero setting, the unloading phase of elimination and the pulsation of dwell period, fast response time, resolving accuracy are high, and in measuring process, only have to measure bucket, measuring wave guide, magnet ring floating drum and measure liquid and contact, almost without rubbing between magnet ring floating drum and measuring wave guide, whole meter long service life, and measure between bucket, measuring wave guide is relatively airtight space, thus the present invention is adapted at rugged surroundings use, and contamination resistance is strong, the present invention also arranges run-down pipe and retention in batch box can be kept consistent with the liquid level of overflow groove, avoids the dead band of measuring wave guide end, ensures that magnet ring floating drum is in the effective travel region of measurement, be also convenient to the zero setting before measuring, valve body is provided with inlet restriction, and batch box inlet restriction effectively can reduce the disturbance caused after Leakage Energy enters measurement bucket, improves the precision measured.
Accompanying drawing explanation
Fig. 1 is the front elevation of magnetostrictive displacement sensing flow meter of the present invention.
Fig. 2 is vertical view of the present invention.
Fig. 3 is valve block vertical view of the present invention.
Fig. 4 is valve block front elevation of the present invention.
Fig. 5 is the A-A cut-open view in Fig. 3.
Fig. 6 is the partial enlarged view at I place in Fig. 5.
Fig. 7 is the B-B cut-open view in Fig. 3.
Fig. 8 is the fundamental diagram that application the present invention carries out flow measurement.
Embodiment
Present pre-ferred embodiments is provided, to describe technical scheme of the present invention in detail below in conjunction with accompanying drawing.
As shown in Fig. 1-Fig. 7, a kind of magnetostrictive displacement sensing flow meter, comprise sensor electronic storehouse 1, crossover sub 2, groove lid 3, overflow groove 5, batch box 6, valve block 8, damping washer 9, straight coupling 10, measuring wave guide 11, magnet ring floating drum 12, it is characterized in that: measuring wave guide 11 is circular magnetostriction materials, copper conductor is equipped with in inside, the lower end of measuring wave guide 11 is connected with damping washer 9, the upper end of measuring wave guide 11 is connected with sensor electronic storehouse 1, magnet ring floating drum 12 is freely movably sleeved on measuring wave guide 11, measuring wave guide 11 is arranged on by damping washer 9 in the mounting hole of valve block 8 central authorities simultaneously, batch box 6 is set with in the outside of magnet ring floating drum 12 and measuring wave guide 11, overflow groove 5 is set with in the outside of batch box 6, the lower end of overflow groove 5 and batch box 6 is arranged on valve block 8, and overflow groove 5, the upper end of batch box 6 and measuring wave guide 11 is arranged on groove lid 3, sensor electronic storehouse 1 is also arranged on groove lid 3 by crossover sub 2, groove lid 3 has the air hole be in communication with the outside.
As shown in fig. 3 to 7, valve block 8 is provided with metering oil-in 81, metered oil outlet 82, inlet restriction 83, batch box inlet restriction 84, central authorities mounting hole 85, overflow slotted eye 86, wherein measure oil-in 81, inlet restriction 83 and central mounting hole 85 are positioned at the central authorities of valve block 8, and are coaxially communicated with successively, batch box inlet restriction 84 is distributed on the step surface of central mounting hole bottom, and batch box inlet restriction 84 is provided with 3-12.Metered oil outlet 82 is positioned at the side of valve block 8, and through with central mounting hole 85, and overflow slotted eye 86 is positioned at the upper surface of valve block 8, and mutually through with metered oil outlet 82.
Wherein, in concrete implementation process, measuring wave guide 11 material is stainless steel material, and can be also other material, be also provided with run-down pipe 7 in the annular space between overflow groove 5 and batch box 6, run-down pipe 7 be arranged in the overflow slotted eye 86 of valve block 8.
Also be provided with anti-overflow cover 4 in the upper end of batch box 6, at an upper portion thereof circumferential wall have spout hole, when the Leakage Energy in batch box 6 is full, Leakage Energy can from spout hole overflow to overflow groove 5.Overflow groove 5 is arranged on valve block 8 by screw 14, at overflow groove 5, installs O-ring seal respectively between batch box 6 and valve block 8.
Valve block 8 is also provided with solenoid valve 15, solenoid valve 15 2/2-way solenoid valve, and solenoid valve 15 1 ports are connected with metered oil outlet 82, the entrance and exit of the normal off path in solenoid valve 15 is provided with the contrary retaining valve of conducting direction.
Utilize above-mentioned magnetostrictive displacement sensing flow meter to carry out a method for flow measurement, comprise the steps:
1) as shown in Figure 8, tested valve Leakage Energy entrance is connected to the inlet end of a retaining valve 16, and the endpiece of retaining valve 16 and the metering oil-in 81 on valve block 8 are connected by pipeline with a port of solenoid valve 15, and metered oil outlet 82 is connected with fuel tank 17 after being connected with another port of solenoid valve 15;
2) start the oil pump that is connected with tested valve, flow through inlet restriction 83 again after the Leakage Energy of tested valve flows through retaining valve and batch box inlet restriction 84 enters batch box 6;
3) magnet ring floating drum 12 raises along with the liquid level in batch box 6 and raises, magnetic field superposition in the motion of the ring-shaped magnet in magnet ring floating drum 12 and measuring wave guide 11 produces magnetostriction effect, make measuring wave guide 11 produce elastic deformation and produce a mechanical wave to both sides expansion therefrom, this mechanical wave is received by the sensor electronic storehouse 1 be connected with measuring wave guide 11 upper end, and is converted to electric signal;
4) by measuring the transmission time of electric signal, the time of place to sensor electronic storehouse 1 can be produced by precision determination ripple, thus determine the distance of magnet ring floating drum 12 with liquid surface lifting, be multiplied by the sectional area between batch box 6 and measuring wave guide 11 by distance, accurately record the volume flow entering batch box.
5) when the initial zero setting of needs, the Leakage Energy entrance of tested element is connected with metering oil-in 81 of the present invention, start oil pump, leak the metering oil-in 81 of fluid on valve block 8, inlet restriction 83 and batch box inlet restriction 84 flow into batch box 6, when the fluid in batch box 6 is filled, the spout hole of fluid through batch box 6 top is spilled over to overflow groove 5 automatically, when the fluid overflowed reaches run-down pipe 7 height, leak fluid and flow back to fuel tank through run-down pipe 7, before each measurement, close oil pump, open solenoid valve 15, fluid in batch box 6 is linked up through solenoid valve 15 and overflow groove 5, fluid in batch box 6 flows into overflow groove 5 through solenoid valve 15, the fluid of overflow groove 5 flows back to fuel tank through run-down pipe 7, liquid level is only freely down to run-down pipe 7 liquid level, the height of magnet ring floating drum 12 in batch box is in the initial position of measurement, this liquid level can be used as measurement starting point, and the display of the current potential of registering instrument is set to zero-bit.
The present invention drives magnet ring floating drum to move up and down by utilizing the change of Leakage Energy liquid level, cause the magnetostrictive effect of magnetostriction materials, make measuring wave guide produce elastic deformation and produce a mechanical wave to both sides expansion therefrom, this mechanical wave is received by the sensor electronic storehouse be connected with measuring wave guide upper end, and be converted to electric signal, through comparing and changing the volume flow calculating Leakage Energy, because its magnetostriction of magnetostrictive effect does not change in time, thus application the present invention and method thereof carry out flow measurement good stability, and reliability is high; In measuring process, automatically can intercept one section of Δ t in linear measuring signal and zero setting, the unloading phase of elimination and the pulsation of dwell period, fast response time, resolving accuracy are high; And in measuring process, only have to measure bucket, measuring wave guide, magnet ring floating drum and measure liquid and contact, almost without rubbing between magnet ring floating drum and measuring wave guide, whole meter long service life, and measure between bucket, measuring wave guide is relatively airtight space, thus the present invention is adapted at rugged surroundings use, and contamination resistance is strong; The present invention also arranges run-down pipe and retention in batch box can be kept consistent with the liquid level of overflow groove, avoids the dead band of measuring wave guide end, ensures that magnet ring floating drum is in the effective travel region of measurement, be also convenient to the zero setting before measuring; Valve body is provided with inlet restriction, and batch box inlet restriction effectively can reduce the disturbance caused after Leakage Energy enters measurement bucket, improves the precision measured.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications; these changes and improvements all fall in the claimed scope of the invention, and application claims protection domain is defined by appending claims and equivalent thereof.
Claims (12)
1. a magnetostrictive displacement sensing flow meter, comprise sensor electronic storehouse (1), crossover sub (2), groove lid (3), overflow groove (5), batch box (6), valve block (8), damping washer (9), straight coupling (10), measuring wave guide (11), magnet ring floating drum (12), it is characterized in that: described measuring wave guide (11) is circular magnetostriction materials, copper conductor is equipped with in inside, the lower end of described measuring wave guide (11) is connected with described damping washer (9), the upper end of described measuring wave guide (11) is connected with described sensor electronic storehouse (1), described magnet ring floating drum (12) is freely movably sleeved on described measuring wave guide (11), described measuring wave guide (11) is arranged on by described damping washer (9) in the mounting hole of described valve block (8) central authorities simultaneously, described batch box (6) is set with in the outside of described magnet ring floating drum (12) and described measuring wave guide (11), described overflow groove (5) is set with in the outside of described batch box (6), the lower end of described overflow groove (5) and batch box (6) is arranged on valve block (8), and described overflow groove (5), the upper end of batch box (6) and measuring wave guide (11) is arranged on described groove lid (3), described sensor electronic storehouse (1) is also arranged on groove lid (3) by described crossover sub (2), described groove lid (3) has the air hole be in communication with the outside.
2. magnetostrictive displacement sensing flow meter according to claim 1, it is characterized in that: described valve block (8) is provided with metering oil-in (81), metered oil outlet (82), inlet restriction (83), batch box inlet restriction (84), central authorities' mounting hole (85), overflow slotted eye (86), wherein said metering oil-in (81), inlet restriction (83) and central mounting hole (85) are positioned at the central authorities of described valve block (8), and be coaxially communicated with successively, described batch box inlet restriction (84) is distributed on the step surface of described central mounting hole bottom, described metered oil outlet (82) is positioned at the side of valve block (8), and it is through with described central mounting hole (85), and described overflow slotted eye (86) is positioned at the upper surface of described valve block (8), and it is mutually through with described metered oil outlet (82).
3. magnetostrictive displacement sensing flow meter according to claim 1, is characterized in that: described measuring wave guide (11) material is stainless steel material.
4. magnetostrictive displacement sensing flow meter according to claim 2, is characterized in that: described batch box inlet restriction (84) is provided with 3-12.
5. magnetostrictive displacement sensing flow meter according to claim 2, it is characterized in that: be also provided with run-down pipe (7) in the annular space between described overflow groove (5) and batch box (6), described run-down pipe (7) is arranged in the described overflow slotted eye (86) of valve block (8).
6. magnetostrictive displacement sensing flow meter according to claim 5, is characterized in that: be also provided with anti-overflow cover (4) in the upper end of described batch box (6).
7. magnetostrictive displacement sensing flow meter according to claim 5, is characterized in that: in the top circumferential wall of described batch box (6), have spout hole.
8. magnetostrictive displacement sensing flow meter according to claim 5, is characterized in that: described overflow groove (5) is arranged on described valve block (8) by screw (14).
9. magnetostrictive displacement sensing flow meter according to claim 5, is characterized in that: described overflow groove (5), installs O-ring seal respectively between batch box (6) and described valve block (8).
10. magnetostrictive displacement sensing flow meter according to claim 5, it is characterized in that: described valve block (8) is also provided with solenoid valve (15), described solenoid valve (15) 2/2-way solenoid valve, and described solenoid valve (15) ports are connected with metered oil outlet (82).
11. magnetostrictive displacement sensing flow meters according to claim 10, is characterized in that: the entrance and exit of the normal off path in described solenoid valve (15) is provided with the contrary retaining valve of conducting direction.
12. 1 kinds of methods utilizing the magnetostrictive displacement sensing flow meter described in claim 1-11 to carry out flow measurement, is characterized in that comprising the steps:
1) tested valve Leakage Energy entrance is connected to the inlet end of a retaining valve (16), and the endpiece of retaining valve (16) and the metering oil-in (81) on described valve block (8) are connected by pipeline with a port of described solenoid valve (15), and described metered oil outlet (82) is connected with fuel tank (17) after being connected with another port of described solenoid valve (15);
2) start the oil pump that is connected with tested valve, flow through inlet restriction (83) again after the Leakage Energy of tested valve flows through retaining valve and batch box inlet restriction (84) enters batch box (6);
3) magnet ring floating drum (12) raises along with the liquid level in batch box (6) and raises, magnetic field superposition in the motion of the ring-shaped magnet in magnet ring floating drum (12) and measuring wave guide (11) produces magnetostriction effect, make measuring wave guide (11) produce elastic deformation and produce a mechanical wave to both sides expansion therefrom, this mechanical wave is received by the sensor electronic storehouse (1) be connected with measuring wave guide (11) upper end, and is converted to electric signal;
4) by measuring the transmission time of electric signal, the time of place to sensor electronic storehouse (1) can be produced by precision determination ripple, thus determine the distance of magnet ring floating drum (12) with liquid surface lifting, be multiplied by the sectional area between batch box (6) and measuring wave guide (11) by distance, accurately record the volume flow entering batch box.
5) when the initial zero setting of needs, the Leakage Energy entrance of tested element is connected with metering oil-in (81) of the present invention, start oil pump, leak the metering oil-in (81) of fluid on valve block (8), inlet restriction (83) and batch box inlet restriction (84) flow into batch box (6), when the fluid in batch box (6) is filled, the spout hole of fluid through batch box (6) top is spilled over to overflow groove (5) automatically, when the fluid overflowed reaches run-down pipe (7) height, leak fluid and flow back to fuel tank through run-down pipe (7), before each measurement, close oil pump, open solenoid valve (15), fluid in batch box (6) is linked up through solenoid valve (15) and overflow groove (5), fluid in batch box (6) flows into overflow groove (5) through solenoid valve (15), the fluid of overflow groove (5) flows back to fuel tank through run-down pipe (7), liquid level is only freely down to run-down pipe (7) liquid level, magnet ring floating drum (12) height in batch box is in the initial position of measurement, this liquid level can be used as measurement starting point, and the display of the current potential of registering instrument is set to zero-bit.
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| CN201410070366.6A CN104677432A (en) | 2013-11-28 | 2014-02-27 | Magnetostrictive displacement sensing flowmeter and flow measuring method |
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| CN114136680A (en) * | 2021-11-29 | 2022-03-04 | 中铁隧道局集团有限公司 | Laser type shield/TBM grease real-time measuring device and measuring method |
| CN116518838A (en) * | 2023-07-05 | 2023-08-01 | 广东润宇传感器股份有限公司 | Displacement sensor based on low-temperature drift compensation and use method |
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| CN114136680A (en) * | 2021-11-29 | 2022-03-04 | 中铁隧道局集团有限公司 | Laser type shield/TBM grease real-time measuring device and measuring method |
| CN114136680B (en) * | 2021-11-29 | 2024-03-19 | 中铁隧道局集团有限公司 | Laser type shield/TBM grease real-time measurement device and measurement method |
| CN116518838A (en) * | 2023-07-05 | 2023-08-01 | 广东润宇传感器股份有限公司 | Displacement sensor based on low-temperature drift compensation and use method |
| CN116518838B (en) * | 2023-07-05 | 2023-10-20 | 广东润宇传感器股份有限公司 | Displacement sensor based on low-temperature drift compensation and use method |
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Application publication date: 20150603 |