CN216283738U - Signal sending mechanism suitable for various volumetric flowmeters - Google Patents

Abstract

The utility model provides a signaling mechanism suitable for various volumetric flowmeters, which comprises a magnetic induction transmission mechanism, a transmission shaft, an output shaft, a connecting shaft unit, a tray and a coded disc. When the code wheel rotates once, dozens or hundreds of pulse signals are output, the output precision of the pulse signals is higher, and the instantaneous flow, the accumulated flow and the like of the fluid can be accurately measured. Simultaneously, through the tray of design bearing code wheel at the top of output shaft, the tray can improve fine support for the code wheel and guarantee, has improved the stability ability of code wheel in rotatory process. Moreover, the design that the positioning protrusions and the positioning holes are matched with each other can realize quick and accurate positioning in the process of disassembling and assembling the code disc, and the disassembling and assembling accuracy is improved.

Description

Signal sending mechanism suitable for various volumetric flowmeters

Technical Field

The utility model relates to the technical field of flowmeters, in particular to a signaling mechanism suitable for various volumetric flowmeters.

Background

The volumetric flow meters commonly used at present comprise: dual rotor flowmeters, triple rotor flowmeters, blade rotor flowmeters, and the like. The dual-rotor flowmeter has the advantages of high metering precision and the disadvantages of easy blockage, heavy weight and long rotor processing time. The three-rotor flow meter has the advantage of difficult blockage, and has the defects of low metering precision and high processing cost of the meter body. The scraper flowmeter has the advantage of difficult blockage, and has the defects of large influence of wax precipitation and scale formation on the metering precision and high processing cost of a meter body.

When the revolution of the rotor is measured by the existing positive displacement flowmeter, the Hall effect principle is generally adopted: the rotary table edge that fixes several magnet steels, the carousel is rotatory along with the axis of survey, and the magnet steel will also follow synchronous revolution, at a hall device of carousel below installation, when the carousel was rotatory along with the axis, received the influence in the produced magnetic field of magnet steel, hall sensor output pulse signal, export counter or other pulse counting assembly after signal processing.

However, after the turntable rotates for one circle, only a few pulse signals can be output, the output frequency is low, and the output precision is low, so that the accuracy of metering the instantaneous flow and the accumulated flow of the fluid is influenced.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a signaling mechanism suitable for various volumetric flowmeters, and improve the frequency and the precision of pulse signal output.

In order to achieve the above object, the present invention provides a signaling mechanism suitable for various volumetric flowmeters, including a magnetic induction transmission mechanism and a transmission shaft, wherein the magnetic induction transmission mechanism is used for driving the transmission shaft to rotate. The output shaft is coaxially arranged above the transmission shaft and is connected with the transmission shaft; a coupling unit for achieving power transmission between the transmission shaft and the output shaft; the tray is coaxially arranged at the top end of the output shaft, and a plurality of positioning bulges are arranged on the top surface of the tray; and the coded disc is coaxially arranged on the tray, the projection of a code channel of the coded disc on the horizontal plane is positioned outside the projection of the tray on the horizontal plane, and a plurality of positioning holes matched with the positioning bulges penetrate through the coded disc.

Preferably, the number of the positioning protrusions and the number of the positioning holes are four, the four positioning protrusions are arranged in an annular array along the circle center of the tray, and the four positioning holes are arranged in an annular array along the circle center of the code disc.

Preferably, the tray further comprises a fastening knob, the top of the tray is recessed downwards to form a first screw hole, a mounting hole penetrates through the center of the coded disc, a screw of the fastening knob penetrates through the mounting hole and then is in threaded fit with the first screw hole, and the coded disc is fastened on the tray by the fastening knob.

Preferably, the coupling unit includes a connection protrusion disposed at a top end of the transmission shaft, and a connection groove disposed at a bottom end of the output shaft, and the connection protrusion is engaged with the connection groove.

Preferably, the magnetic induction transmission mechanism comprises: a first magnetic steel seat having a circular groove arranged coaxially with the transmission shaft; the center of the isolation sleeve penetrates through a second mounting hole, the circumferential edge of the second mounting hole extends downwards to form an isolation cylinder with a closed bottom end, and the isolation cylinder extends into the circular groove; the second magnetic steel seat is coaxially arranged in the isolation cylinder and connected to the bottom of the transmission shaft, and the second magnetic steel seat and the first magnetic steel seat are magnetically attracted; the first shaft sleeve is rotatably sleeved on the transmission shaft, the first shaft sleeve is arranged in the second mounting hole, a first mounting disc is formed by extending the circumferential outer wall of the first shaft sleeve outwards along the radial direction, and the first mounting disc is mounted on the isolation sleeve.

Preferably, the isolation sleeve is circular, and the circumferential outer wall of the isolation sleeve extends outwards in the radial direction to form a positioning boss.

Preferably, the bottom of the first magnetic steel seat is recessed upwards to form a connecting hole coaxial with the circular groove.

Preferably, the power transmission device further comprises a second shaft sleeve, the second shaft sleeve is rotatably sleeved on the output shaft and is located below the tray, and the circumferential outer wall of the second shaft sleeve extends outwards along the radial direction to form a second mounting disc.

The utility model has the beneficial effects that:

the utility model discloses a signaling mechanism suitable for various volumetric flowmeters, which can output dozens or hundreds of pulse signals when a coded disc rotates for one circle, and the output frequency and the precision of the pulse signals are higher, so that the instantaneous flow, the accumulated flow and the like of fluid can be accurately measured. Simultaneously, through the tray of design bearing code wheel at the top of output shaft, the tray can improve fine support for the code wheel and guarantee, has improved the stability ability of code wheel in rotatory process.

Moreover, the design that the positioning protrusions and the positioning holes are matched with each other can realize quick and accurate positioning in the process of disassembling and assembling the code disc, and the disassembling and assembling accuracy is improved. The signaling mechanism has simple structure, convenient installation and use, stable operation and suitability for various volumetric flowmeters.

Drawings

In order to more clearly illustrate the detailed description of the utility model or the technical solutions in the prior art, the drawings that are needed in the detailed description of the utility model or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic structural diagram of a signaling mechanism suitable for various volumetric flowmeters according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a signaling mechanism;

FIG. 3 is a schematic structural diagram of a code wheel;

FIG. 4 is a schematic structural view of a tray;

fig. 5 is a schematic view of the separation of the drive shaft from the output shaft.

Reference numerals:

10-a magnetic induction transmission mechanism, 11-a first magnetic steel seat, 111-a circular groove, 112-a connecting hole, 12-an isolating sleeve, 121-a second mounting hole, 122-an isolating cylinder, 123-a positioning boss, 13-a second magnetic steel seat, 14-a first shaft sleeve and 15-a first mounting disc;

20-transmission shaft, 21-connecting projection;

30-output shaft, 31-connecting groove;

40-tray, 41-positioning projection, 42-first screw hole;

50-code disc, 51-code channel, 52-positioning hole and 53-mounting hole;

60-fastening a knob;

70-second bushing, 71-second mounting plate.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the utility model pertains.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In one embodiment of the present invention, as shown in fig. 1-5, a signaling mechanism for a plurality of volumetric flowmeters is provided, which comprises a magnetic induction transmission mechanism 10 and a transmission shaft 20, wherein the magnetic induction transmission mechanism 10 is in transmission connection with a rotor of the flowmeter so as to drive the transmission shaft 20 to rotate, and further comprises an output shaft 30, a shaft coupling unit, a tray 40 and a code disc 50.

The output shaft 30 is coaxially arranged above the transmission shaft 20 and connected with the transmission shaft 20, and the coupling unit is used for realizing power transmission between the transmission shaft 20 and the output shaft 30. The tray 40 is coaxially fixed to the top end of the output shaft 30, and a plurality of positioning protrusions 41 are provided on the top surface of the tray 40. The code disc 50 is coaxially arranged on the tray 40, a plurality of light-transmitting and light-tight code channels 51 which are uniformly distributed are etched on the code disc 50, the projection of the code channels 51 on the horizontal plane is positioned outside the projection of the tray 40 on the horizontal plane, and a plurality of positioning holes 52 matched with the positioning protrusions 41 penetrate through the code disc 50.

The infrared ray inside the meter head (not shown in the figure) vertically irradiates on the code channel 51 of the code disc 50, when the code disc 50 rotates, the cut infrared ray is used for switching on and off to output a stable and regular pulse signal, the signal processing device inside the meter head amplifies and shapes the pulse signal, the calculating device calculates the instantaneous flow, the accumulated flow and the like through the rotating speed, and the signal output device outputs the instantaneous flow, the accumulated flow and the like according to the communication protocol. The devices in the pulse signal processing and outputting processes are all the prior art, and are not described herein again.

The signaling mechanism of the present embodiment, which is suitable for various volumetric flowmeters, outputs dozens or hundreds of pulse signals every time the code disc 50 rotates one cycle, and the output frequency and precision of the pulse signals are higher, so that the instantaneous flow rate, the accumulated flow rate, etc. of the fluid can be accurately measured. Meanwhile, the tray 40 for supporting the coded disc 50 is designed at the top end of the output shaft 30, the tray 40 can well support and guarantee the coded disc 50, and the stability of the coded disc 50 in the rotating process is improved. Moreover, the design that the positioning protrusions 41 and the positioning holes 52 are matched with each other can realize quick and accurate positioning in the process of disassembling and assembling the code disc 50, so that the disassembling and assembling accuracy is improved. The signaling mechanism has the advantages of simple structure, convenient installation and use, stable operation and suitability for various volumetric flowmeters (such as a double-rotor flowmeter, a three-rotor flowmeter, a scraper rotor flowmeter and the like).

In one embodiment, four positioning protrusions 41 and four positioning holes 52 are provided, respectively, four positioning protrusions 41 being arranged in an annular array along the center of the tray 40, and four positioning holes 52 being arranged in an annular array along the center of the code wheel 50. The design that four positioning protrusions 41 and four positioning holes 52 are matched with each other can realize quick and accurate positioning in the process of disassembling and assembling the code disc 50, and the disassembling and assembling accuracy is improved.

In one embodiment, the signaling mechanism further comprises a fastening knob 60, the top of the tray 40 is recessed downward to form a first screw hole 42, the first screw hole 42 extends downward along the output shaft 30, a mounting hole 53 extends through the center of the code disc 50, a screw of the fastening knob 60 passes through the mounting hole 53 and then is in threaded fit with the first screw hole 42, and the fastening knob 60 fastens the code disc 50 on the tray 40. After the tightening knob 60 is tightened in the first threaded hole 42, the tightening knob 60 may firmly press the code wheel 50 against the tray 40, thereby making the code wheel 50 more stable during rotation.

In one embodiment, the coupling unit includes a coupling protrusion 21 provided at the top end of the driving shaft 20, and a coupling groove 31 provided at the bottom end of the output shaft 30, and the coupling protrusion 21 is engaged with the coupling groove 31. When the gauge outfit is disassembled and assembled, in order to facilitate the connection and the separation of the transmission shaft 20 and the output shaft 30, the connecting shaft unit is designed into the structural form of the connecting protrusion 21 and the connecting groove 31, so that the processing is convenient, and the connection stability can be ensured.

In one embodiment, the magnetic induction transmission mechanism 10 comprises a first magnetic steel base 11, an isolation sleeve 12, a second magnetic steel base 13 and a first shaft sleeve 14. The first magnetic steel seat 11 is connected with the rotor in a transmission mode, the first magnetic steel seat 11 is provided with a circular groove 111 which is coaxial with the transmission shaft 20, external magnetic steel is fixed in the first magnetic steel seat 11, a second mounting hole 53 penetrates through the center of the isolation sleeve 12, the circumferential edge of the second mounting hole 53 extends downwards to form an isolation cylinder 122 with a closed bottom end, and the isolation cylinder 122 extends into the circular groove 111. The second magnetic steel seat 13 is coaxially arranged in the isolation cylinder 122 and connected to the bottom of the transmission shaft 20, the second magnetic steel seat 13 is internally fixed with inner magnetic steel, and the inner magnetic steel of the second magnetic steel seat 13 and the outer magnetic steel of the first magnetic steel seat 11 are magnetically attracted.

The first shaft sleeve 14 is rotatably sleeved on the transmission shaft 20 through a bearing, the first shaft sleeve 14 is arranged in the second mounting hole 53, a circumferential outer wall of the first shaft sleeve 14 extends outwards along the radial direction to form a first mounting disc 15, and the first mounting disc 15 is mounted on the isolation sleeve 12. A plurality of second screw holes are formed in the first mounting disc 15 in a penetrating mode, and the first mounting disc 15 is connected with the isolation sleeve 12 through bolts. The rotor drives the first magnetic steel base 11 to rotate synchronously, the second magnetic steel base 13 is driven to rotate by magnetic force, the second magnetic steel base 13 drives the transmission shaft 20 to rotate synchronously, and the transmission shaft 20 drives the output shaft 30 and the tray 40 to rotate through the connecting shaft unit, so that the coded disc 50 is driven to rotate. The isolation sleeve 12 and the isolation cylinder 122 are of an integral structure and are made of stainless steel, and the stainless steel magnetic conduction does not contain magnetism, so that the reliability of magnetic transmission of the inner magnetic steel of the second magnetic steel seat 13 and the outer magnetic steel of the first magnetic steel seat 11 is guaranteed, the isolation sleeve 12 can isolate fluid in the shell (not shown in the figure), and the fluid is prevented from entering the inside of the meter head. Of course, the magnetic torque transmission technology is the prior art and will not be described in detail herein.

In one embodiment, spacer sleeve 12 is circular in shape and the outer circumferential wall of spacer sleeve 12 extends radially outward to form a locating boss 123. After the isolation sleeve 12 is installed on the casing of the flowmeter, the isolation sleeve 12 needs to be pressed and fixed by the compression ring, and therefore, the accuracy of the alignment of the compression ring and the isolation sleeve 12 is guaranteed by designing the positioning boss 123.

In one embodiment, in order to facilitate the connection of the first magnetic steel base 11 with the rotating shaft of the rotor, the bottom of the first magnetic steel base 11 is recessed upward to form a connection hole 112 coaxial with the circular groove 111.

In one embodiment, to mount the tray 40 and the output shaft 30 inside the watch head, the signaling mechanism includes a second sleeve 70, the second sleeve 70 is rotatably mounted on the output shaft 30 through a bearing and is located below the tray 40, and a circumferential outer wall of the second sleeve 70 extends radially outward to form a second mounting plate 71. A plurality of third screw holes are formed in the second mounting disc 71 in a penetrating manner, and the second mounting disc 71 is connected with the gauge outfit through bolts.

In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the utility model may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims (8)

1. The utility model provides a be suitable for signaling mechanism of multiple volumetric flowmeter, includes magnetic induction drive mechanism and transmission shaft, magnetic induction drive mechanism is used for the drive the transmission shaft is rotatory, its characterized in that: further comprising:

the output shaft is coaxially arranged above the transmission shaft and is connected with the transmission shaft;

a coupling unit for achieving power transmission between the transmission shaft and the output shaft;

the tray is coaxially arranged at the top end of the output shaft, and a plurality of positioning bulges are arranged on the top surface of the tray; and

the coded disc is coaxially arranged on the tray, the projection of a code channel of the coded disc on the horizontal plane is positioned outside the projection of the tray on the horizontal plane, and a plurality of positioning holes matched with the positioning protrusions penetrate through the coded disc.

2. The signaling mechanism of claim 1, adapted for use with a plurality of positive displacement flow meters, wherein: the positioning protrusions and the positioning holes are respectively provided with four, the four positioning protrusions are arranged in an annular array along the circle center of the tray, and the four positioning holes are arranged in an annular array along the circle center of the coded disc.

3. The signaling mechanism according to claim 1 or 2, wherein the signaling mechanism comprises: the tray is characterized by further comprising a fastening knob, the top of the tray is downwards sunken to form a first screw hole, a mounting hole penetrates through the center of the coded disc, a screw of the fastening knob penetrates through the mounting hole and then is in threaded fit with the first screw hole, and the coded disc is fastened on the tray through the fastening knob.

4. The signaling mechanism of claim 1, adapted for use with a plurality of positive displacement flow meters, wherein: the connecting shaft unit comprises a connecting protrusion arranged at the top end of the transmission shaft and a connecting groove arranged at the bottom end of the output shaft, and the connecting protrusion is matched with the connecting groove.

5. The signaling mechanism of claim 1, adapted for use with a plurality of positive displacement flow meters, wherein: the magnetic induction drive mechanism includes:

a first magnetic steel seat having a circular groove arranged coaxially with the transmission shaft;

the center of the isolation sleeve penetrates through a second mounting hole, the circumferential edge of the second mounting hole extends downwards to form an isolation cylinder with a closed bottom end, and the isolation cylinder extends into the circular groove;

the second magnetic steel seat is coaxially arranged in the isolation cylinder and connected to the bottom of the transmission shaft, and the second magnetic steel seat and the first magnetic steel seat are magnetically attracted; and

the first shaft sleeve is rotatably sleeved on the transmission shaft and arranged in the second mounting hole, a first mounting disc is formed by extending the circumferential outer wall of the first shaft sleeve outwards along the radial direction, and the first mounting disc is mounted on the isolation sleeve.

6. The signaling mechanism of claim 5 adapted for use with a plurality of positive displacement flow meters, wherein: the spacer sleeve is circular, and the circumferential outer wall of the spacer sleeve extends outwards along the radial direction to form a positioning boss.

7. The signaling mechanism of claim 5 adapted for use with a plurality of positive displacement flow meters, wherein: and a connecting hole coaxial with the circular groove is formed in the bottom of the first magnetic steel seat in an upwards sunken mode.

8. The signaling mechanism of claim 1, adapted for use with a plurality of positive displacement flow meters, wherein: the second shaft sleeve is rotatably sleeved on the output shaft and is positioned below the tray, and the circumferential outer wall of the second shaft sleeve extends outwards along the radial direction to form a second mounting disc.

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