CN213956496U

CN213956496U - Small-bore flow instrument

Info

Publication number: CN213956496U
Application number: CN202022834420.3U
Authority: CN
Inventors: 徐兴伟; 王磊; 强磊
Original assignee: Kaifeng Baite Flow Instrument Co ltd
Current assignee: Kaifeng Baite Flow Instrument Co ltd
Priority date: 2020-12-01
Filing date: 2020-12-01
Publication date: 2021-08-13
Anticipated expiration: 2030-12-01

Abstract

The utility model relates to a small-caliber flow meter, which comprises a flow calculator, a support column and a measuring tube body, wherein the two ends of the support column are respectively connected with the flow calculator and the measuring tube body, a through hole which runs through along the axial direction is arranged in the measuring tube body, an annular groove is arranged on the inner side wall of the through hole, a spoiler which can freely slide is arranged in the annular groove, and the center of the spoiler is coincided with the central shaft of the through hole; the flow meter comprises a flow meter, a flow baffle plate, a plurality of liquid passing holes, a plurality of pressure sensors, a flow meter and a flow meter, wherein the flow baffle plate is provided with the liquid passing holes; a buffer device is arranged on one side of the through hole, which meets the flow of the fluid; the problem of when the fluid just let in the draught tube, the fluid front end forms great impact force, causes too big impact to determine module, damages determine module or reduces and detect the precision is solved.

Description

Small-bore flow instrument

Technical Field

The utility model belongs to the technical field of flow measurement instrument, concretely relates to small-bore flow instrument.

Background

A flow meter is also called a "flowmeter" and is a meter for detecting the flow rate of a fluid such as liquid or gas in a pipe. The fluid flow meter is divided into a liquid flow meter and a gas flow meter according to different types of measured fluids; according to different working principles, the flow meter is divided into a differential pressure type flow meter, a rotor flow meter, a throttling type flow meter, a slit flow meter, a volume flow meter, an electromagnetic flow meter, an ultrasonic flow meter and the like; the differential pressure type flowmeter changes the pressure in the pipeline according to the reduced cross section, and the flow in the pipeline is converted according to the change of the pressure.

The patent of the Chinese utility model with the publication number of CN202382776U discloses a super-small caliber vortex shedding flowmeter, which comprises a converter, a connecting rod, a detection assembly and a vortex shedding guide pipe; the converter is used for signal processing, display and remote transmission; the connecting rod is arranged at the lower part of the converter and is used for connecting the converter and the detection assembly; the detecting component has a square external structure, a round pipe in the middle, a triangular prism generator and a stress type probe are arranged in the detecting component, and guide pipes are arranged on two sides of the detecting component and are used for detecting flow signals; the vortex street guide pipe is sleeved at two sides of the detection assembly, and inlets at two ends are processed into a circular contraction-shaped structure which enables vortex separation to be more stable; the detection component generates a signal and transmits the signal to the converter, and the measurement digital display is realized through the conversion of the converter. However, when the flowmeter is used, when fluid just enters the guide pipe, the front end of the fluid forms a large impact force, which causes an excessive impact to the detection assembly, and the detection assembly is easily damaged or the detection precision is reduced.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems that when fluid is just introduced into the guide pipe, the front end of the fluid forms larger impact force, causes overlarge impact on the detection assembly, damages the detection assembly or reduces the detection precision, the utility model provides a small-caliber flow meter; in order to achieve the above object, the utility model discloses a technical scheme specifically as follows:

a small-caliber flow meter comprises a flow calculator, a support column and a measuring tube body, wherein two ends of the support column are respectively connected with the flow calculator and the measuring tube body, a through hole penetrating along the axial direction is formed in the measuring tube body, an annular groove is formed in the inner side wall of the through hole, a spoiler capable of freely sliding is arranged in the annular groove, and the center of the spoiler is coincided with the central axis of the through hole; the flow meter comprises a flow meter, a flow baffle plate, a plurality of liquid passing holes, a plurality of pressure sensors, a flow meter and a flow meter, wherein the flow baffle plate is provided with the liquid passing holes; and a buffer device is arranged on one side of the through hole, which meets the flow of the fluid.

The utility model discloses a small-bore flow instrument's beneficial effect: under the interaction of the flow blocking plate and the wall of the through hole, a dune and venturi benefit is formed at the position of the through hole where the flow blocking plate is located, so that the pressure on two sides of the flow blocking plate is changed, the flow blocking plate is pressed against the pressure sensor under the action of fluid, the pressure sensor generates an electric signal and transmits the electric signal to the flow calculator, and the flow of the fluid in the through hole is displayed after the electric signal is analyzed and processed by the flow calculator; through being provided with buffer in the one side that the through-hole caters to the fluid flow, when solving the fluid and just letting in the water conservancy diversion pipe, the fluid front end forms great impact force, under buffer's effect, forms the buffering to the fluid front end, reduces the impact to detecting element (spoiler and pressure sensor).

Further, buffer includes horn pipe, buffer board and buffer spring, the horn pipe sets up the one end of measuring the body that measures the body and cater to the one side that the fluid flows, the buffer board is coaxial to be set up in the horn pipe, buffer spring's both ends are fixed respectively on the inside wall of buffer board and horn pipe.

Has the advantages that: the buffer device comprises the horn tube, the buffer plate and the buffer spring, so that the structure is simple, and the buffer effect is good; when fluid just enters the guide pipe, the front end of the fluid presses the buffer plate, the buffer plate compresses the buffer spring, the buffer plate moves, and a gap between the buffer plate and the inner side face of the horn pipe is changed, so that the amount of the fluid entering the through hole is adjusted, and the impact on the detection assembly in the through hole is reduced.

Further, the horn pipe and the measuring pipe body structure as an organic whole, the aperture of the minor diameter end of horn pipe with the aperture of through-hole equals, the diameter of buffer board is less than the aperture of through-hole, and buffer spring through-hole support is fixed on the inside wall of horn pipe.

Has the advantages that: the horn tube and the measuring tube body are of an integrated structure, so that the horn tube has the characteristics of simple structure and convenience in processing; the small-diameter end of the horn tube is equal to the aperture of the through hole, so that a step is formed when the fluid normally flows, and the normal flow of the fluid is influenced.

Furthermore, a first flange is arranged at one end, away from the measuring pipe body, of the horn pipe, a second flange is arranged at one end, away from the horn pipe, of the measuring pipe body, bolt through holes are formed in the first flange and the second flange respectively, and a groove for inserting a sealing ring into the sealing groove is formed in the connecting surface of the first flange and the second flange.

Has the advantages that: through setting up first flange and second flange, the small-bore flow instrument of being convenient for is connected with the pipeline, through inserting the sealing washer in sealed recess, is favorable to improving and connects the leakproofness.

Furthermore, a through hole is formed in the supporting column, the electrical signal connection between the pressure sensor and the flow calculator is specifically wire connection, and the wire passes through the through hole and is connected with the flow calculator; an anti-seepage plug is arranged in the through hole, and a through hole for a lead to pass through is formed in the anti-seepage plug.

Has the advantages that: the wire is adopted to transmit the electric signal, so that the stability in the signal transmission process is facilitated, and the detection signal is interfered; and through holes for the insertion of the conducting wires are formed in the supporting columns, so that the conducting wires are prevented from leaking.

Further, an annular check ring is arranged in one side, away from the pressure sensor, of the annular groove, and the annular check ring and the annular groove are fixed in an adhesive mode.

Has the advantages that: the annular retainer ring is used for filling part of the annular groove, and the influence of the annular groove on fluid flow is reduced.

Further, the pressure sensor includes at least 3, evenly arranges at interval along the circumference of through-hole.

Has the advantages that: through setting up 3 at least pressure sensor, for the spoiler provides stable support, be favorable to the stable collection of pressure sensor signal.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of a small-bore flow meter according to the present invention;

FIG. 2 is a right side view of FIG. 1;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;

fig. 4 is an enlarged view of fig. 3 at B.

Reference numbers in the figures: 1-a flow calculator, 2-a support column, 3-a measuring tube body, 4-a through hole, 5-an annular groove, 6-a spoiler, 7-a liquid passing hole, 8-a pressure sensor, 9-a buffer device, 91-a horn tube, 92-a buffer plate, 93-a buffer spring, 10-an annular retainer ring, 11-a first flange, 12-a second flange, 13-a bolt through hole, 14-a sealing groove, 15-a through hole and 16-an anti-seepage plug.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments:

the specific structure of the embodiment of the small-caliber flow meter of the utility model is shown in fig. 1-4, and comprises a flow calculator 1, a support column 2 and a measuring tube body 3, wherein two ends of the support column 2 are respectively connected with the flow calculator 1 and the measuring tube body 3, a through hole 4 which runs through along the axial direction is arranged in the measuring tube body 3, an annular groove 5 is arranged on the inner side wall of the through hole 4, a spoiler 6 which can slide freely is arranged in the annular groove 5, and the center of the spoiler 6 is coincided with the central axis of the through hole 4; a plurality of liquid passing holes 7 are formed in the spoiler 6, a plurality of pressure sensors 8 are arranged on one side of the spoiler 6, which is far away from the flow of the fluid, two ends of each pressure sensor 8 are fixedly connected with the spoiler 6 and the end wall of the annular groove 5 respectively, and the pressure sensors 8 are in electrical signal connection with the flow calculator 1; the side of the through hole 4 facing the fluid flow is provided with a damping device 9.

In this embodiment, the buffer device 9 includes a flared tube 91, a buffer plate 92 and a buffer spring 93, the flared tube 91 is disposed at one end of the measuring tube 3 on a side of the measuring tube 3 facing the fluid flow, the buffer plate 92 is coaxially disposed in the flared tube 91, and two ends of the buffer spring 93 are respectively fixed on the inner side walls of the buffer plate 92 and the flared tube 91; the buffer device 9 comprises a horn tube 91, a buffer plate 92 and a buffer spring 93, and has simple structure and good buffer effect; when fluid just enters the guide pipe, the front end of the fluid presses the buffer plate 92, the buffer plate 92 compresses the buffer spring 93, the buffer plate 92 moves, and the gap between the buffer plate 92 and the inner side face of the horn pipe 91 is changed, so that the amount of the fluid entering the through hole 4 is adjusted, and the impact on the detection assembly in the through hole 4 is reduced. The flared tube 91 and the measuring tube body 3 are of an integrated structure, the aperture of the small-diameter end of the flared tube 91 is equal to that of the through hole 4, the diameter of the buffer plate 92 is smaller than that of the through hole 4, and the buffer spring 93 is fixed on the inner side wall of the flared tube 91 through the through hole 4; the horn pipe 91 and the measuring pipe body 3 are of an integrated structure, and the measuring pipe has the characteristics of simple structure and convenience in processing; the small diameter end of the flared tube 91 is equal to the aperture of the through hole 4, so that the normal flow of the fluid is prevented from being influenced by the step formed when the fluid normally flows. In other embodiments, the flare tube and the measuring tube body adopt a split structure instead of an integral structure, and the flare tube and the measuring tube body are connected through a flange.

In the embodiment, an annular retainer ring 10 is arranged in one side of the annular groove 5 away from the pressure sensor 8, and the annular retainer ring 10 is fixed with the annular groove 5 by gluing; the annular collar 10 is used to fill part of the annular groove 5 and reduce the influence of the annular groove 5 on the fluid flow. Pressure sensor includes 3, arranges along the even interval of circumference of through-hole 4, sets pressure sensor 8 to 3, for spoiler 6 provides stable support, is favorable to the stable collection of 8 signals of pressure sensor. In other embodiments, the pressure sensors are provided in 4 or 5 or more, and are arranged at regular intervals in the circumferential direction of the through hole.

In this embodiment, a first flange 11 is disposed at an end of the flare tube 91 far from the measuring tube body 3, a second flange 12 is disposed at an end of the measuring tube body 3 far from the flare tube 91, bolt through holes 134 are respectively disposed on the first flange 11 and the second flange 12, and a sealing groove 14 for inserting a sealing ring is disposed on a connection surface of the first flange 11 and the second flange 12; through setting up first flange 11 and second flange 12, the small-bore flow instrument of being convenient for is connected with the detection pipeline, through inserting the sealing washer in sealed recess 14, is favorable to improving and connects the leakproofness. A through hole 15 is formed in the support column 2, the electrical signal connection between the pressure sensor 8 and the flow calculating instrument 1 is specifically wire connection, and a wire passes through the through hole 15 and is connected with the flow calculating instrument 1; an anti-seepage plug 16 is arranged in the through hole 15, and a through hole for a lead to pass through is formed in the anti-seepage plug 16; the wire is adopted to transmit the electric signal, so that the stability in the signal transmission process is facilitated, and the detection signal is interfered; the through holes 15 for the insertion of the conducting wires are arranged in the supporting columns 2, so that the conducting wires are prevented from leaking. In other embodiments, no through hole is formed in the support column, and a lead for electric signal transmission leaks outside.

When the device is used, when fluid just enters the guide pipe, the front end of the fluid presses the buffer plate 92, the buffer plate 92 compresses the buffer spring 93, the buffer plate 92 moves, and a gap between the buffer plate 92 and the inner side surface of the horn pipe 91 is changed, so that the amount of the fluid entering the through hole 4 is adjusted, and the impact on a detection assembly in the through hole 4 is reduced; when the flow rate of the fluid is stable, under the interaction of the spoiler 6 and the hole wall of the through hole 4, a dune venturi effect is formed at the position of the through hole 4 where the spoiler 6 is positioned, so that the pressure at two sides of the spoiler 6 is changed, the spoiler 6 is pressed against the pressure sensor 8 under the action of the fluid, the pressure sensor 8 generates an electric signal and transmits the electric signal to the flow calculating instrument 1, and the flow of the fluid in the through hole 4 is displayed after the analysis processing of the flow calculating instrument 1.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A small-caliber flow meter comprises a flow calculator, a support column and a measuring tube body, wherein two ends of the support column are respectively connected with the flow calculator and the measuring tube body, and a through hole penetrating along the axial direction is formed in the measuring tube body; the flow meter comprises a flow meter, a flow baffle plate, a plurality of liquid passing holes, a plurality of pressure sensors, a flow meter and a flow meter, wherein the flow baffle plate is provided with the liquid passing holes; and a buffer device is arranged on one side of the through hole, which meets the flow of the fluid.

2. The small-bore flow meter according to claim 1, wherein the buffer device comprises a flare tube, a buffer plate and a buffer spring, the flare tube is disposed at one end of the measuring tube on a side of the measuring tube facing the fluid flow, the buffer plate is coaxially disposed in the flare tube, and two ends of the buffer spring are respectively fixed on inner sidewalls of the buffer plate and the flare tube.

3. The small-bore flow meter according to claim 2, wherein the flare tube and the measuring tube are of an integral structure, the diameter of the small-bore end of the flare tube is equal to that of the through hole, the diameter of the buffer plate is smaller than that of the through hole, and the buffer spring through hole support is fixed on the inner side wall of the flare tube.

4. The small-caliber flow meter according to claim 3, wherein a first flange is provided at an end of the flare away from the measuring pipe body, a second flange is provided at an end of the measuring pipe body away from the flare, bolt through holes are respectively provided on the first flange and the second flange, and a groove for inserting a sealing ring into the sealing groove is provided on a connection surface of the first flange and the second flange.

5. The small-caliber flow meter according to claim 1, wherein a through hole is formed in the support column, the electrical signal connection between the pressure sensor and the flow calculator is specifically a wire connection, and the wire passes through the through hole and is connected with the flow calculator; an anti-seepage plug is arranged in the through hole, and a through hole for a lead to pass through is formed in the anti-seepage plug.

6. The small bore flow meter of claim 1, wherein an annular retaining ring is disposed in a side of the annular groove remote from the pressure sensor, the annular retaining ring being adhesively secured to the annular groove.

7. The small bore flow meter of claim 1, wherein the pressure sensors comprise at least 3, evenly spaced circumferentially of the through bore.