CN212903367U - Small impeller type digital flowmeter - Google Patents
Small impeller type digital flowmeter Download PDFInfo
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- CN212903367U CN212903367U CN202021679138.6U CN202021679138U CN212903367U CN 212903367 U CN212903367 U CN 212903367U CN 202021679138 U CN202021679138 U CN 202021679138U CN 212903367 U CN212903367 U CN 212903367U
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Abstract
The utility model belongs to the technical field of measuring device, especially, relate to a small-size impeller formula digital flowmeter. A small impeller type digital flowmeter comprises a flowmeter shell and a flowmeter base which are connected with each other, wherein an impeller is arranged in the base, an impeller cavity is formed in the base, the impeller is fixed in the impeller cavity through a rotating shaft and rotates in the impeller cavity, and a multi-stage magnetic ring is further arranged on the rotating shaft and is positioned above the impeller. The utility model provides a light and graceful small-size impeller formula digital flowmeter that little flow characteristic improves by a wide margin of structure.
Description
Technical Field
The utility model belongs to the technical field of measuring device, especially, relate to a small-size impeller formula digital flowmeter.
Background
The current industrial flow meters are various in types, and differential pressure, turbine vortex street, electromagnetic, ultrasonic and the like are not sufficient. In the measurement of small pipe diameter and low flow rate in strong acid, strong alkali, marine application and the like, the most commonly used impeller flowmeter is generally adopted for the measurement of small pipe diameter and small flow rate at present, and other flow rate measurement methods have larger error and are not stable, the low flow rate characteristic is not ideal, and the price is generally higher. Although impeller flowmeters are suitable for small-pipe-diameter and small-flow measurement, most of the impeller flowmeters are applied to civil products, and small impeller digital flowmeters suitable for industrial application environments are very few.
The method is characterized in that the method is used for measuring small pipe diameter and low flow, particularly for measuring small flow below DN15 pipe diameter and flow below 20L/min, the most suitable measuring method is an impeller type, and other measuring methods are not advantageous in small pipe diameter and low flow measurement. However, the current small-caliber low-flow measurement application is mostly in the civil field, and the existing small-caliber impeller digital flow meter mostly does not have the characteristics of acid and alkali resistance and corrosion resistance, and can not meet the application in the industrial field.
The impeller type flowmeter in the prior art has the technical content as disclosed in Chinese patent CN 207263242U: the impeller structure for the flowmeter comprises an impeller body, a magnet and an impeller insert, wherein the magnet is firstly connected with the impeller insert through one-time injection molding, the impeller insert with the magnet is then connected with the impeller body through two-time injection molding, and the magnet is completely encapsulated by the impeller insert and the impeller body.
Inside magnet among the above-mentioned technical scheme located the impeller, because the weight of magnet is overweight, can lead to measurement accuracy scheduling problem relatively poor.
Disclosure of Invention
The utility model aims to solve the technical problem that a small-size impeller-type digital flowmeter that the structure is slim and graceful, little flow characteristic improves by a wide margin is provided. Therefore, the utility model adopts the following technical scheme:
a small impeller type digital flowmeter comprises a flowmeter shell and a flowmeter base which are connected with each other, wherein an impeller is arranged in the base, an impeller cavity is formed in the base, the impeller is fixed in the impeller cavity through a rotating shaft and rotates in the impeller cavity, and a multi-stage magnetic ring is further arranged on the rotating shaft and is positioned above the impeller.
The multistage magnetic ring can obtain more pulse numbers, and has higher sensitivity and higher precision on small-flow measurement.
On the basis of adopting above-mentioned technical scheme, the utility model discloses still can adopt following further technical scheme:
the lower part of the shell is provided with a boss provided with an accommodating cavity, and when the shell is connected with the base, the multistage magnetic ring is arranged in the accommodating cavity; a sealing groove is formed in the side portion of the boss, and a sealing ring is arranged in the sealing groove.
An electrical appliance cavity is further formed in the upper portion of the shell, an electronic component is fixed in the electrical appliance cavity, and an electrical appliance cover plate which fully covers the opening is further arranged at the position of the opening in the upper portion of the electrical appliance cavity.
The electronic component comprises a PCB, a liquid crystal screen arranged above the PCB and a Hall sensor arranged below the PCB, and the bottom of the electric appliance cavity is further provided with a long groove for the Hall sensor to be inserted into. The circuit part adopts a function linearization technology, can realize extremely high precision in the whole range, and can show excellent advantages in low flow rate measurement. The circuit adopts 24V direct current power supply, liquid crystal display and RS485 digital communication output.
The electric appliance cover plate is provided with a facial mask in an attaching mode.
The impeller comprises an impeller cavity, and is characterized in that a left channel and a right channel which are communicated with the impeller cavity are respectively formed in two sides of the impeller cavity, a left connecting cavity is arranged at the joint of the left channel and the impeller cavity, a right connecting cavity is arranged at the joint of the right channel and the impeller cavity, and the caliber of the joint of the left connecting cavity and the impeller cavity is smaller than that of the joint of the right connecting cavity and the impeller cavity. The design with different calibers is a unique eccentric diversion design, and even if the flow is small under the condition of extremely small flow, the impeller can also obtain enough driving force and can also rotate under the action of extremely small driving force. The stable pulse number can be obtained under the condition of the lowest flow rate of 0.1L/min, the stable flow rate is displayed, and the high sensitivity is embodied.
The left connecting cavity comprises a first channel and a second channel, the first channel is a straight channel and is communicated with the impeller cavity, and the second channel is arranged between the left channel and the first channel, and the caliber of the second channel is gradually reduced from the left channel to the first channel; the right connecting cavity is a straight channel.
An electrical socket is further arranged on the side of the upper portion of the shell and connected with the shell through threads.
The shell is connected with the base through hexagon socket head cap screws, and at least two screws are arranged.
The shell is made of ABS material, and Teflon material is sprayed on the contact surface of the shell and the base with liquid. The Teflon spraying technology is adopted to ensure that all liquid receiving parts have the characteristics of acid and alkali resistance and corrosion resistance, and particularly, the liquid receiving parts are applied to seawater and are resistant to chloride ion corrosion.
The utility model has the advantages that: the multi-stage magnetic rings are adopted to replace single magnetic steel, and the magnetic rings are not fixed on the impeller but on the rotating shaft, so that the structure of the impeller is more balanced and lighter, and the small flow characteristic is greatly improved. The utility model discloses a flowmeter specially is little pipe diameter, and low flow measurement and design, and the specification has the hickey of 4 minutes, 3 minutes, 2 minutes, is fit for DN6 to DN 15's little pipe diameter flow measurement, small in size, simple to operate, flow range 0.2 ~ 30L/min. Through the innovative design, the excellent small-flow measuring characteristic is realized, and the high-sensitivity and high-precision small-flow impeller digital flowmeter is provided. The acid and alkali resistance and corrosion resistance design makes the product suitable for strong acid and alkali and marine measurement environment.
Description of the drawings:
fig. 1 is a sectional view of the small impeller type digital flowmeter according to the present invention.
Fig. 2 is a cross-sectional view of the small impeller type digital flowmeter according to the present invention in a separated state.
The device comprises an electric appliance cover plate 1, a liquid crystal display 2, a Hall sensor 3, a PCB 4, a shell 5, an electric appliance socket 6, a hexagon socket screw 7, a base 8, a sealing O-shaped ring 9, a multi-stage magnetic ring 10, an impeller 11, a rotating shaft 12, a left channel 13, a right channel 14, a right connecting cavity 15, a first channel 16, a second channel 17 and a containing cavity 18.
Detailed Description
The small impeller type digital flowmeter provided by the utility model is further explained by combining with the attached drawings.
The terms "first" and "second" in the present application 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
In the first embodiment, as shown in fig. 1-2, a small impeller-type digital flowmeter comprises a flowmeter casing 5 and a flowmeter base 8 which are connected with each other, wherein the casing 5 is connected with the flowmeter base 8 through hexagon socket head cap screws 7, and four hexagon socket head cap screws 7 are provided.
An electrical appliance cavity is further formed above the shell 5, an electronic component is fixed in the electrical appliance cavity, and an electrical appliance cover plate 1 which fully covers the opening is further arranged at the position of the opening above the electrical appliance cavity.
Furthermore, the electronic component comprises a PCB (printed circuit board) 4, a liquid crystal screen 2 arranged above the PCB 4 and a Hall sensor 3 arranged below the PCB 4, and the bottom of the electric appliance cavity is also provided with a long groove for inserting the Hall sensor 3.
Further, a facial mask is attached to the electric appliance cover plate 1.
Furthermore, an electrical socket 6 is arranged on the upper side of the shell 5, and the electrical socket 6 is connected with the shell 5 through threads.
Further, the shell 5 is made of ABS material, and the contact surfaces of the shell 5 and the base 8 with liquid are sprayed by Teflon.
The lower part of the shell 5 is provided with a boss provided with a containing cavity 18, and when the shell 5 is connected with the base 8, the multistage magnetic ring 10 is arranged in the containing cavity 18.
Furthermore, a sealing groove is formed in the side part of the boss, and a sealing O-shaped ring 9 is arranged in the sealing groove.
An impeller 11 is installed in the base 8, an impeller cavity is formed in the base 8, the impeller 11 is fixed in the impeller cavity through a rotating shaft 12 and rotates in the impeller cavity, a multi-stage magnetic ring 10 is further arranged on the rotating shaft 12, and the multi-stage magnetic ring 10 is located above the impeller 11.
The two sides of the impeller cavity are respectively provided with a left channel 13 and a right channel 14 which are communicated with the impeller cavity, the joint of the left channel 13 and the impeller cavity is provided with a left connecting cavity, the joint of the right channel 14 and the impeller cavity is provided with a right connecting cavity 15, and the caliber of the joint of the left connecting cavity and the impeller cavity is smaller than that of the joint of the right connecting cavity 15 and the impeller cavity.
The left connecting cavity comprises a first channel 16 and a second channel 17, the first channel 16 is a straight channel and is communicated with the impeller cavity, and the second channel 17 is arranged between the left channel 13 and the first channel 16, and the caliber of the second channel is gradually reduced from the left channel 13 to the first channel 16.
Further, the right connecting chamber 15 is a straight passage.
While the invention has been shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the appended claims.
Claims (10)
1. A small impeller type digital flowmeter comprises a flowmeter shell and a flowmeter base which are connected with each other, wherein an impeller is arranged in the base, the small impeller type digital flowmeter is characterized in that an impeller cavity is formed in the base, the impeller is fixed in the impeller cavity through a rotating shaft and rotates in the impeller cavity, and a multi-stage magnetic ring is further arranged on the rotating shaft and is positioned above the impeller.
2. The small impeller type digital flowmeter as claimed in claim 1, wherein the lower part of the casing is provided with a boss provided with a receiving cavity, and when the casing is connected with the base, the multistage magnetic ring is placed in the receiving cavity; a sealing groove is formed in the side portion of the boss, and a sealing ring is arranged in the sealing groove.
3. The small impeller-type digital flowmeter according to claim 1, wherein an electrical cavity is further formed above the housing, an electronic component is fixed in the electrical cavity, and an electrical cover plate fully covering the opening is further provided at an upper opening of the electrical cavity.
4. The small impeller-type digital flowmeter according to claim 3, wherein the electronic components include a PCB, a liquid crystal display disposed above the PCB, and a Hall sensor disposed below the PCB, and the bottom of the electrical chamber is further provided with a slot into which the Hall sensor is inserted.
5. The small impeller-type digital flowmeter as set forth in claim 3, wherein a face mask is attached to said cover plate.
6. The small impeller-type digital flowmeter of claim 1, wherein a left channel and a right channel communicated with the impeller cavity are respectively formed at two sides of the impeller cavity, a left connecting cavity is formed at the joint of the left channel and the impeller cavity, a right connecting cavity is formed at the joint of the right channel and the impeller cavity, and the aperture of the joint of the left connecting cavity and the impeller cavity is smaller than that of the joint of the right connecting cavity and the impeller cavity.
7. The small impeller-type digital flowmeter of claim 6, wherein the left connecting chamber comprises a first channel and a second channel, the first channel is a straight channel and is communicated with the impeller chamber, the second channel is arranged between the left channel and the first channel, and the caliber of the second channel is gradually reduced from the left channel to the first channel; the right connecting cavity is a straight channel.
8. The small impeller-type digital flowmeter of claim 1, wherein an electrical socket is further provided on the upper side of the housing, and the electrical socket is connected to the housing by a screw thread.
9. The small impeller type digital flowmeter of claim 1, wherein the housing is connected to the base by at least two socket head cap screws.
10. The small impeller-type digital flowmeter of claim 1, wherein the housing is made of ABS material, and teflon material is further coated on the liquid contact surface of the housing and the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021679138.6U CN212903367U (en) | 2020-08-13 | 2020-08-13 | Small impeller type digital flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021679138.6U CN212903367U (en) | 2020-08-13 | 2020-08-13 | Small impeller type digital flowmeter |
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| Publication Number | Publication Date |
|---|---|
| CN212903367U true CN212903367U (en) | 2021-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021679138.6U Active CN212903367U (en) | 2020-08-13 | 2020-08-13 | Small impeller type digital flowmeter |
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| CN (1) | CN212903367U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113607225A (en) * | 2021-08-25 | 2021-11-05 | 上海朝辉压力仪器有限公司 | Impeller flowmeter |
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2020
- 2020-08-13 CN CN202021679138.6U patent/CN212903367U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113607225A (en) * | 2021-08-25 | 2021-11-05 | 上海朝辉压力仪器有限公司 | Impeller flowmeter |
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