CN220625455U - Volumetric standard metering device - Google Patents
Volumetric standard metering device Download PDFInfo
- Publication number
- CN220625455U CN220625455U CN202322362765.7U CN202322362765U CN220625455U CN 220625455 U CN220625455 U CN 220625455U CN 202322362765 U CN202322362765 U CN 202322362765U CN 220625455 U CN220625455 U CN 220625455U
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- CN
- China
- Prior art keywords
- plunger rod
- fixedly connected
- fixing plate
- liquid cylinder
- grating ruler
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 59
- 239000007788 liquid Substances 0.000 claims abstract description 41
- 238000006073 displacement reaction Methods 0.000 claims abstract description 11
- 238000005259 measurement Methods 0.000 claims abstract description 7
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 5
- 238000012795 verification Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Abstract
The utility model relates to a positive displacement standard metering device which solves the technical problem of how to improve the measurement precision and stability of the existing water meter and comprises a base, a liquid cylinder, a grating ruler fixing plate, a grating ruler reading head, a metering plunger rod assembly, a screw rod, a screw nut, a servo motor, a water inlet pipeline and a water outlet pipeline, wherein the lower end of the liquid cylinder is fixedly connected with the base, the upper end of the liquid cylinder is fixedly connected with an upper supporting plate through four fixing columns, one end of the grating ruler fixing plate is fixedly connected with the upper end of the liquid cylinder, the other end of the grating ruler fixing plate is fixedly connected with the upper supporting plate, the grating ruler is fixedly connected with the grating ruler fixing plate, and the grating ruler reading head is fixedly connected with the upper supporting plate; the upper end of the screw rod is connected with the upper supporting plate through a bearing seat, the servo motor is fixedly connected with the upper supporting plate through a motor seat, and an output shaft of the servo motor is connected with the upper end of the screw rod through a speed reducer and a coupler.
Description
Technical Field
The utility model relates to the technical field of water meters, in particular to a positive displacement standard metering device.
Background
In the technical field of water meters, a traditional water meter calibrating device has larger uncertainty, especially in the detection of small flow points.
In order to meet certain volume requirements, the traditional water meter device can only reduce uncertainty caused by the device by reducing the cross section area of the metering rod and increasing the processing precision. However, this results in a small device size and an increased height, which makes maintenance difficult. Therefore, it is a technical problem to be solved by those skilled in the art if the measurement accuracy and stability are improved.
Disclosure of Invention
The utility model provides a positive displacement standard metering device, which aims to solve the technical problem of how to improve the measurement accuracy and stability of the existing water meter.
The utility model provides a positive displacement standard metering device which comprises a base, a liquid cylinder, a grating ruler fixing plate, a grating ruler reading head, a metering plunger rod assembly, a screw rod nut, a servo motor, a water inlet pipeline and a water outlet pipeline, wherein the lower end of the liquid cylinder is fixedly connected with the base; the upper end of the screw rod is connected with the upper supporting plate through a bearing seat; the screw nut is connected with the screw; the servo motor is fixedly connected with the upper supporting plate through a motor seat, and an output shaft of the servo motor is connected with the upper end of the screw rod through a speed reducer and a coupler; the metering plunger rod assembly comprises a plunger rod fixing plate I, linear bearings, a plunger rod fixing plate II and a plunger rod, wherein the plunger rod fixing plate I is fixedly connected with a screw nut, the plunger rod is fixedly connected with the plunger rod fixing plate II, the plunger rod fixing plate II is in sliding connection with the four fixing columns through the four linear bearings, and the plunger rod fixing plate I is fixedly connected with the four linear bearings; the lower end of the plunger rod extends into the liquid cylinder from the upper end of the liquid cylinder; the water inlet pipeline is connected with the liquid cylinder, and the water outlet pipeline is connected with the liquid cylinder.
Preferably, the liquid tank is connected with a drain line.
The utility model has the beneficial effects that the closed circulation metering is carried out by adopting the servo motor and the grating ruler, and the error sources in the metering process can be reduced by accurately controlling the servo motor and monitoring the position information of the grating ruler in real time, so that the measuring precision and stability are improved, and the uncertainty is reduced.
The servo motor and the grating ruler are adopted to directly measure the volume, the influence of the water temperature and the water density change is avoided, the verification error caused by the water temperature and the water density change of the traditional water meter is avoided, and the measurement accuracy is improved.
Drawings
FIG. 1 is a schematic view of a positive displacement standard metering device according to the present utility model, wherein FIG. (a) is a front view of the positive displacement standard metering device and FIG. (b) is a side view of the positive displacement standard metering device;
fig. 2 is a schematic view of the return of the metering plunger rod assembly;
fig. 3 is a schematic view of the structure of the liquid cylinder for absorbing water.
Symbol description in the drawings:
1. the liquid cylinder device comprises a base, a liquid cylinder, a grating ruler fixing plate, a metering plunger rod assembly, a plunger rod fixing plate I, a linear bearing I, a plunger rod fixing plate II, a plunger rod I, a grating ruler 5, a grating ruler 6, a grating ruler reading head 7, a screw nut 8, a screw rod 9, a coupler 10, a servo motor 11, a speed reducer 12, an upper supporting plate 13, a fixing column 14, a water inlet pipeline 15, a water outlet pipeline 16 and a drainage pipeline.
Detailed Description
The utility model will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the volumetric standard metering device comprises a base 1, the lower end of a liquid cylinder 2 is fixedly connected with the base 1, the upper end of the liquid cylinder 2 is fixedly connected with an upper supporting plate 12 through four fixing columns 13, one end of a grating ruler fixing plate 3 is fixedly connected with the upper end of the liquid cylinder 2, the other end of the grating ruler fixing plate 3 is fixedly connected with the upper supporting plate 12, a grating ruler 5 is fixedly connected with the grating ruler fixing plate 3, and a grating ruler reading head 6 is fixedly connected with the upper supporting plate 12. The upper end of the screw rod 8 is connected with an upper supporting plate 12 through a bearing seat; the screw nut 7 is connected and matched with the screw rod 8, the screw rod nut 7 can move up and down on the screw rod 8, the servo motor 10 is fixedly connected with the upper supporting plate 12 through a motor base, and an output shaft of the servo motor 10 is connected with the upper end of the screw rod 8 through the speed reducer 11 and the coupler 9. The metering plunger rod assembly 4 is in sliding connection with the four fixing columns 13, the metering plunger rod assembly 4 can move up and down along the fixing columns 13, the metering plunger rod assembly 4 comprises a first plunger rod fixing plate 4-1, a linear bearing 4-2, a second plunger rod fixing plate 4-3 and a first plunger rod 4-4, the first plunger rod fixing plate 4-1 is fixedly connected with a screw nut 7, the first plunger rod 4-4 is fixedly connected with the second plunger rod fixing plate 4-3, the four linear bearings 4-2 are fixedly connected with the second plunger rod fixing plate 4-3, and the second plunger rod fixing plate 4-3 is in sliding connection with the four fixing columns 13 through the four linear bearings 4-2, so that auxiliary supporting and positioning functions are realized in operation; the plunger rod fixing plate I4-1 is fixedly connected with four linear bearings 4-2; the lower part of the plunger rod 4-4 protrudes from the upper end of the liquid cylinder 2. The servo motor 10 works to drive the screw rod 8 to rotate, drive the screw rod nut 7 to linearly move on the screw rod 8, and drive the plunger rod 4-4 to move up and down in the liquid cylinder 2 by the screw rod nut 7. The water inlet pipeline 14 is connected with the liquid cylinder 2, the water outlet pipeline 15 is connected with the liquid cylinder 2, and the water outlet pipeline 16 is connected with the liquid cylinder 2, so that water suction, water outlet and water discharge actions can be performed. The water inlet pipeline 14 is connected with an external water tank, and the water outlet pipeline 15 is connected with a test bench.
The drain line 16 is typically used for maintenance of equipment and for drain and decontamination when impurities are present in the water.
The following describes the method of using the positive displacement standard metering device:
(1) The water outlet pipeline valve is connected with the water outlet pipeline 15, the water discharge pipeline valve is connected with the water discharge pipeline 16, and the water inlet pipeline valve is connected with the water inlet pipeline 14.
(2) Resetting the metering plunger rod assembly 4: the water outlet pipeline valve is opened, the water inlet pipeline valve and the water draining pipeline valve are closed, then the servo motor is operated to drive the metering plunger rod assembly 4 to move downwards in the liquid cylinder 2, and the metering plunger rod assembly stops after reaching the required position (as shown in fig. 2, stops when reaching a certain distance between the metering plunger rod assembly and the bottom of the liquid cylinder), and the grating ruler reading head 6 reads while the metering plunger rod assembly 4 moves. The metering plunger rod assembly is designed to be at a certain distance from the bottom of the liquid cylinder.
(3) The liquid jar absorbs water: the water inlet pipeline valve is opened, the water outlet pipeline valve is closed, the water discharge pipeline valve is closed, then the servo motor 10 is operated reversely, the metering plunger rod assembly 4 is driven to move upwards in the liquid cylinder 2, the metering plunger rod assembly stops after reaching the required position, the liquid cylinder is fully filled with water, and the metering plunger rod assembly 4 moves and simultaneously the grating ruler reading head 6 reads.
(4) Liquid cylinder water outlet: the water outlet pipeline valve is opened, the water inlet pipeline valve is closed, and the water discharge pipeline valve is closed; then the servo motor is operated to drive the metering plunger rod assembly 4 to move downwards in the liquid cylinder 2, the metering plunger rod assembly stops after reaching the required position, water stored in the liquid cylinder is pushed out, and the metering plunger rod assembly 4 moves and the grating ruler reading head 6 reads.
(5) And calculating the volume of the pushed water according to the reading difference value of the grating ruler reading head and the sectional area of the plunger rod 4-4, and sequentially calculating the difference value of the volume of the pushed water and the volume of the measuring meter.
When the positive displacement standard metering device is matched with the verification device for use, the servo motor can push out water in the liquid cylinder at a stable speed according to requirements.
By adopting the servo motor and the grating ruler, closed circulation metering can be realized, the volume change of water can be accurately measured, and higher measurement precision and stability can be obtained compared with the traditional device.
By adopting the servo motor and the grating ruler for closed circulation metering, the problems of small volume, large uncertainty, large verification error, long verification time, large installation height, difficult maintenance and the like of the water meter verification device are effectively solved. The device has higher measurement precision, stability and accuracy, and avoids errors caused by water temperature and water density changes. The innovative characteristics enable the metering equipment to have higher practical value and application prospect. Meanwhile, as the grating ruler is high in precision and quick in feedback time, uncertain factors of the device are reduced, the diameter of a metering rod can be increased, the processing precision is reduced, the size of the device is increased, the height is reduced, the convenience of installation and the convenience of maintenance operation are optimized, the cost of manufacturing the device is reduced, better use experience is brought to users, obvious economic benefits are brought in actual production, and the feasibility and market competitiveness of the device are improved.
It should be noted that the first plunger rod fixing plate 4-1 may be fixedly connected to the second plunger rod fixing plate 4-3 via a connecting rod instead of being fixedly connected to the four linear bearings 4-2.
The above description is only for the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the scope of the claims of the present utility model should fall within the protection scope of the present utility model.
Claims (2)
1. The utility model provides a positive displacement standard metering device, its characterized in that includes base, liquid jar, grating chi fixed plate, grating chi reading head, measurement plunger rod assembly, lead screw nut, servo motor, water inlet pipeline and outlet pipe way, the lower extreme and the base fixed connection of liquid jar, the upper end of liquid jar is through four fixed columns and last backup pad fixed connection, the upper end fixed connection of one end and liquid jar of grating chi fixed plate, the other end and last backup pad fixed connection of grating chi fixed plate, grating chi and grating chi fixed plate fixed connection, grating chi reading head and last backup pad fixed connection; the upper end of the screw rod is connected with the upper supporting plate through a bearing seat; the screw nut is connected with the screw; the servo motor is fixedly connected with the upper supporting plate through a motor seat, and an output shaft of the servo motor is connected with the upper end of the screw rod through a speed reducer and a coupler; the metering plunger rod assembly comprises a plunger rod fixing plate I, linear bearings, a plunger rod fixing plate II and a plunger rod, wherein the plunger rod fixing plate I is fixedly connected with a screw nut, the plunger rod is fixedly connected with the plunger rod fixing plate II, the plunger rod fixing plate II is in sliding connection with four fixing columns through four linear bearings, and the plunger rod fixing plate I is fixedly connected with the four linear bearings; the lower end of the plunger rod extends into the liquid cylinder from the upper end of the liquid cylinder; the water inlet pipeline is connected with the liquid cylinder, and the water outlet pipeline is connected with the liquid cylinder.
2. The positive displacement standard metering device of claim 1, wherein the liquid cylinder is connected to a drain line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322362765.7U CN220625455U (en) | 2023-08-30 | 2023-08-30 | Volumetric standard metering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322362765.7U CN220625455U (en) | 2023-08-30 | 2023-08-30 | Volumetric standard metering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220625455U true CN220625455U (en) | 2024-03-19 |
Family
ID=90226482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322362765.7U Active CN220625455U (en) | 2023-08-30 | 2023-08-30 | Volumetric standard metering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220625455U (en) |
-
2023
- 2023-08-30 CN CN202322362765.7U patent/CN220625455U/en active Active
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