CN214200488U - Pressure precision output device of liquid medium for pressure instrument measurement precision detection - Google Patents
Pressure precision output device of liquid medium for pressure instrument measurement precision detection Download PDFInfo
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- CN214200488U CN214200488U CN202120502584.8U CN202120502584U CN214200488U CN 214200488 U CN214200488 U CN 214200488U CN 202120502584 U CN202120502584 U CN 202120502584U CN 214200488 U CN214200488 U CN 214200488U
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Abstract
The utility model discloses a pressure instrument measurement accuracy detects with liquid medium's accurate output device of pressure belongs to mechatronic and pressure instrument's measurement accuracy and detects technical field. The device comprises: the method comprises the following steps: the device comprises a linear driving device, a liquid pressure adjusting device, a standard meter, a detected meter, an exhaust and liquid supplementing device, a controller and an operation console; the linear driving device is connected with the controller; the liquid pressure adjusting device is in power connection with the linear driving device; the exhaust liquid supplementing device is respectively connected with the liquid pressure regulating device and the liquid pipeline; the controller is connected with the standard meter; the operation console is in communication connection with the controller through a data line. The utility model discloses can carry out accurate control to liquid pressure adjusting device output liquid medium, can satisfy the high accuracy demand that low pressure to high-pressure instrument detected simultaneously, have characteristics such as simple structure, low in manufacturing cost, pressure control precision height, possess good price/performance ratio.
Description
Technical Field
The utility model belongs to the technical field of mechatronic and pressure instrument's measurement accuracy detects technique and specifically relates to indicate pressure instrument measurement accuracy detects with liquid medium's accurate output device of pressure.
Background
According to the regulations, instrument instruments (hereinafter collectively referred to as instruments) such as a pointer type mechanical pressure gauge, a pressure transmitter, a differential pressure transmitter, a pressure switch, a digital pressure gauge, a pressure sensor, an I/P controller/positioner and the like need to be regularly detected so as to ensure that the tested data can meet the required precision requirement; the metering detection is finished in a detection mechanism with related qualification, and a qualified instrument can obtain a metering calibration certificate of a metering verification certificate issued by the qualified detection mechanism.
The measuring range of the instrument has high or low, the required pressure is required to be generated during detection, the pressure can be generated by gas (compressed air, nitrogen and the like) or liquid (oil, water and the like) and other media, the reading of the instrument to be detected is required to be read when the pressure of the media reaches each detection point during detection, and then whether the testing precision is qualified is determined. Therefore, the pressure of the medium needs to be accurately controlled to reach the value of each detection point during the detection process, and the pause pressure holding needs to be carried out.
The conventional manual pressing method is not only inefficient, but also has a bad influence on the accuracy of detection because it is difficult to accurately control the pressure to the pressure of each detection point at one time. For reasons such as safety, the automatic gas medium pressure source generally can only provide about 6MPa of pressure, and cannot meet the detection requirements of high-pressure and ultrahigh-pressure instruments. The high pressure sources such as 'gas drive liquid' and the like also have the defects of complex structure, high price, need of an external gas source or matching with a pressurizing pump and the like.
SUMMERY OF THE UTILITY MODEL
Therefore, the technical problem to be solved by the present invention is to overcome the problems of the prior art that the automatic pressure source has a complex structure and a high price, and needs an external air source or is equipped with a pressurizing pump.
In order to solve the technical problem, the utility model provides a pressure instrument measurement accuracy detects with liquid medium's accurate output device of pressure, include: the device comprises a linear driving device, a liquid pressure adjusting device, a standard meter, a detected meter, an exhaust and liquid supplementing device, a controller and an operation console; the linear driving device is connected with the controller through a first lead; the liquid pressure adjusting device is in power connection with the linear driving device and outputs liquid media with corresponding pressure through the linear driving device; the detected meter and the standard meter are both connected to the output end of the liquid pressure regulating device through a liquid pipeline; the exhaust liquid supplementing device is respectively connected with the liquid pressure regulating device and the liquid pipeline and is used for exhausting air in the liquid medium and supplementing the liquid medium; the controller is connected with the standard meter through a second lead and acquires the real-time pressure of the standard meter through the controller; the operation control console is used for setting the number of the verification points and the pressure of the verification points, and is in communication connection with the controller through a data line.
In an embodiment of the present invention, the linear driving device includes: the output end of the motor is connected with the translation mechanism, the translation mechanism is used for converting the rotary motion of the motor into linear motion, and the power of the linear reciprocating motion is output outwards by the telescopic shaft.
In an embodiment of the present invention, the liquid pressure adjusting device includes: the plunger piston is connected with the telescopic shaft through a shaft connecting sleeve, and the plunger piston can reciprocate in the hydraulic cylinder through the reciprocating motion of the telescopic shaft.
In an embodiment of the present invention, the exhaust fluid infusion device includes: the liquid storage tank is connected with the liquid return pipe through the first valve; liquid return pipe one end is connected on the pneumatic cylinder, and the other end is connected in the liquid storage tank, the liquid pipeline passes through the liquid delivery pump and is connected with the liquid storage tank, first valve is located on the liquid pipeline, the second valve is located back on the liquid pipe.
In an embodiment of the present invention, the type of the first valve includes a check valve and a solenoid valve, and the type of the second valve includes a solenoid valve.
The utility model discloses an in the embodiment, liquid line connects in the output of pneumatic cylinder, detected table, standard table connect on liquid line just detected table, standard table pressure keep unanimous.
In an embodiment of the present invention, the standard table and the detected table all include: a pressure transmitter.
In an embodiment of the present invention, the operation console includes: a computer, a human-computer interface, or a manual control knob.
In an embodiment of the present invention, the controller includes: PLC, singlechip.
In an embodiment of the present invention, the type of the motor includes: servo motor, step motor.
Compared with the prior art, the technical scheme of the utility model have following advantage:
the utility model discloses carry out the accurate control to liquid pressure adjusting device output liquid medium according to the predetermined examination point pressure of operation control platform and pressure rising and falling speed, this accurate control's precision can reach the micron order, can satisfy the high accuracy demand of low pressure to high-pressure instrument detection simultaneously, in addition, can be in order to discharge the air of liquid medium in the system and can in time supply liquid medium through exhaust fluid infusion device. The utility model has the characteristics of simple structure, low in manufacturing cost, pressure control precision height etc, possess good price/performance ratio.
Drawings
In order to make the content of the invention more clearly understood, the invention will now be described in further detail with reference to specific embodiments thereof, in conjunction with the accompanying drawings, in which
Fig. 1 is a structure diagram of a pressure precision output device of a liquid medium for measuring precision detection of a pressure instrument.
The specification reference numbers indicate: 1. a hydraulic cylinder; 2. a plunger; 3. a shaft connecting sleeve; 4. a telescopic shaft; 5. a translation mechanism; 6. a motor; 7. a first conductive line; 8. a controller; 9. a data line; 10. a second conductive line; 11. operating a console; 12. a standard table; 13. a detected table; 14. a liquid line; 15. a first valve; 16. a liquid delivery pump; 17. a liquid storage tank; 18. a liquid return pipe; 19. a second valve.
Detailed Description
The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention. It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances for purposes of describing the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Examples
Referring to fig. 1, the utility model discloses a pressure instrument measurement accuracy detects with liquid medium's accurate output device of pressure includes: the device comprises a linear driving device, a liquid pressure adjusting device, a standard meter 12, a detected meter 13, an exhaust and liquid supplementing device, a controller 8 and an operation console 11; the linear driving device is connected with a controller 8 through a first lead 7; the liquid pressure adjusting device is in power connection with the linear driving device and outputs liquid media with corresponding pressure through the linear driving device; the detected meter 13 and the standard meter 12 are both connected to the output end of the liquid pressure regulating device through a liquid pipeline 14; the exhaust liquid supplementing device is respectively connected with the liquid pressure adjusting device and the liquid pipeline 14, and is used for exhausting air in the liquid medium and supplementing the liquid medium; the controller 8 is connected with the standard meter 12 through a second lead 10, and the real-time pressure of the standard meter 12 is obtained through the controller 8; the operation console 11 is used for setting the number of the verification points and the pressure of the verification points, and the operation console 11 is in communication connection with the controller 8 through a data line 9. Through the structure, the system can accurately control the output of the liquid pressure regulating device and the liquid medium according to the pressure of the detection point preset by the operation console 11 and the pressure increasing and decreasing rate, can meet the high-precision requirement of detection from low pressure to a high-pressure instrument, and can discharge the air of the liquid medium in the system and timely supplement the liquid medium through the exhaust liquid supplementing device.
Specifically, the linear driving device includes: the device comprises a motor 6, a translation mechanism 5 and a telescopic shaft 4, wherein the output end of the motor 6 is connected with the translation mechanism 5, the translation mechanism 5 is used for converting the rotary motion of the motor 6 into linear motion, and the telescopic shaft 4 outputs the power of the linear reciprocating motion to the outside; the types of the motor 6 include: servo motor, step motor; the translation mechanism 5 may be the following mechanism: and one end of the screw rod is connected with the motor, and the other end of the screw rod is connected with the telescopic shaft 4. Through the structure, the rotary motion of the motor 6 can be stably converted into linear motion, so that the displacement of the telescopic shaft 4 is accurately controlled, and the precision of the telescopic shaft is guaranteed to reach the micron level.
Specifically, the liquid pressure adjusting device includes: the hydraulic cylinder comprises a hydraulic cylinder 1 and a plunger 2, wherein the plunger 2 is connected with a telescopic shaft 4 through a shaft connecting sleeve 3, and the plunger 2 can reciprocate in the hydraulic cylinder 1 through the reciprocating motion of the telescopic shaft 4. With the above configuration, the pressure of the output liquid medium in the hydraulic cylinder 1 is raised or lowered.
Specifically, the exhaust fluid infusion device includes: a first valve 15, a liquid delivery pump 16, a liquid storage tank 17, a liquid return pipe 18 and a second valve 19; one end of the liquid return pipe 18 is connected to the hydraulic cylinder 1, the other end of the liquid return pipe is connected to the liquid storage tank 17, the liquid pipeline 14 is connected to the liquid storage tank 17 through the liquid delivery pump 16, the first valve 15 is arranged on the liquid pipeline 14, the second valve 19 is arranged on the liquid return pipe 18, the first valve 15 comprises a one-way valve and an electromagnetic valve, the second valve 19 comprises an electromagnetic valve, and the liquid medium contained in the liquid storage tank 17 can be water or oil. With the above-described arrangement, in the open state of the first valve 15 and the second valve 19, the liquid delivery pump 16 circulates the liquid medium in the liquid tank 17 among the liquid line 14, the hydraulic cylinder 1, and the liquid return pipe 18, so as to exhaust the air of the liquid medium in the system circuit and replenish the liquid medium.
Specifically, the liquid pipeline 14 is connected to the output end of the hydraulic cylinder 1, the detected meter 13 and the standard meter 12 are connected to the liquid pipeline 14, and the pressures of the detected meter 13 and the standard meter 12 are kept consistent. The standard meter 12 transmits the pressure signal to the controller 8, so that the output pressure of the liquid medium can be accurately measured, and a control feedback signal is provided for controlling the voltage increase and decrease.
Specifically, the standard table 12 and the detected table 13 each include: a pressure transmitter.
Specifically, the operation console 11 includes: a computer, a human-computer interface, or a manual control knob.
Specifically, the controller 8 includes: PLC, singlechip. If manual operation is selected to control the processes of rising, stopping, falling and the like of the pressure of the liquid medium, no PLC or single chip microcomputer is needed in the controller 8, and the operation console 1111 only needs to manually control a knob (or other similar switches) to control the rotation rate (including forward and reverse rotation and stopping) of the motor 6.
It should be noted that the pressure degree of the meter 14 to be detected can be realized by an automatic detection method, and specifically, the pressure degree can be realized by an "automatic detection device of a mechanical pointer type meter" disclosed in application No. 202010753060.6, which is not described herein again.
The control method of the control system comprises the following steps:
the number of the detection points and the pressure of each detection point are input into a computer or a human-computer interface of the operation console 11 in advance, the operation console 11 sends a 'start' command, and the first valve 15 and the second valve 19 are in a closed state;
the controller 8 receives the instruction and uploads the pressure of the standard meter 12 to a computer or a human-computer interface of the operation console 11; the controller 8 controls the rate of rotation (including stopping) of the motor 6 based on the pressure difference between the current liquid medium output pressure and the certification point, including: when the numerical value of the pressure difference changes from large to small, the rotation speed of the motor 6 is changed from fast to slow, and when the output pressure is equal to the pressure of the verification point, the motor 6 stops rotating; the above control process makes the motor 6 rotate faster when the pressure difference is larger, and the motor 6 rotate slower when the pressure is closer to the pressure of the verification point, and the motor 6 stops rotating when the current output pressure is equal to the pressure of the verification point, so that the pressure of the liquid medium can be controlled to accurately reach the pressure of each verification point, and the required pause (pressure maintaining) is realized at the pressure of each verification point.
The inspection flow for testing the precision of the detected table 13 includes: the controller 8 controls the motor 6 to enable the output pressure to rise, pause, fall and pause; the method specifically comprises the following steps: the controller 8 rotates according to a program input in advance, and then controls the liquid pressure to rise, pause, fall and pause according to the specification of a pressure gauge or a pressure transmitter 'inspection procedure' so as to finish the inspection flow of the test precision of the pressure gauge to be inspected;
when the test precision detection process of the detected meter 13 is completed, a computer or a human-computer interface of the operation console 11 sends an 'end' instruction to the controller 8, and the controller 8 controls the motor 6 to stop rotating;
the first valve 15 and the second valve 19 are opened, and the liquid transfer pump 16 circulates the liquid medium in the liquid storage tank 17 among the liquid line 14, the hydraulic cylinder 1 and the liquid return pipe 18 to discharge the air of the liquid medium in the system and supplement the liquid medium.
Further, the above control process may also control the rotation speed of the motor 6 by manually operating a button to perform a test process of the test accuracy of the table 13 to be tested.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.
Claims (10)
1. Pressure instrument measurement accuracy detects with accurate output device of liquid medium's pressure, its characterized in that includes:
the linear driving device is connected with the controller through a first lead;
the liquid pressure adjusting device is in power connection with the linear driving device and outputs liquid media with corresponding pressure through the linear driving device;
the device comprises a standard meter and a detected meter, wherein the detected meter and the standard meter are both connected to the output end of a liquid pressure regulating device through a liquid pipeline;
the exhaust liquid supplementing device is respectively connected with the liquid pressure regulating device and the liquid pipeline and is used for exhausting air in the liquid medium and supplementing the liquid medium;
the controller is connected with the standard meter through a second lead and acquires the real-time pressure of the standard meter through the controller;
the operation control console is used for setting the number of the verification points and the pressure of the verification points, and the operation control console is in communication connection with the controller through a data line.
2. The pressure-precision output device of a liquid medium for pressure-meter measurement-precision detection according to claim 1, characterized in that the linear driving device includes: the output end of the motor is connected with the translation mechanism, the translation mechanism is used for converting the rotary motion of the motor into linear motion, and the power of the linear reciprocating motion is output outwards by the telescopic shaft.
3. The pressure-precision output device of a liquid medium for pressure-meter measurement-precision detection according to claim 2, characterized in that the liquid pressure adjusting device includes: the plunger piston is connected with the telescopic shaft through a shaft connecting sleeve, and the plunger piston can reciprocate in the hydraulic cylinder through the reciprocating motion of the telescopic shaft.
4. The pressure-meter-measurement-accuracy-detecting liquid medium pressure-accuracy output device according to claim 2 or 3, characterized in that the exhaust-gas-liquid-replenishing device includes: the liquid storage tank is connected with the liquid return pipe through the first valve; liquid return pipe one end is connected on the pneumatic cylinder, and the other end is connected in the liquid storage tank, the liquid pipeline passes through the liquid delivery pump and is connected with the liquid storage tank, first valve is located on the liquid pipeline, the second valve is located back on the liquid pipe.
5. The pressure instrument measurement accuracy detection liquid medium pressure accuracy output device according to claim 4, wherein the first valve is of a type including a one-way valve and a solenoid valve, and the second valve is of a type including a solenoid valve.
6. The apparatus according to claim 3, wherein the fluid line is connected to an output end of the hydraulic cylinder, and the detected gauge and the standard gauge are connected to the fluid line and the pressures of the detected gauge and the standard gauge are kept in agreement with each other.
7. The apparatus for accurately outputting the pressure of the liquid medium for measuring accuracy detection of a pressure meter according to claim 1, wherein each of the standard meter and the meter to be detected includes: a pressure transmitter.
8. The pressure-precision output device of a liquid medium for pressure-meter measurement-precision detection according to claim 1, characterized in that the operation console includes: a computer, a human-computer interface, or a manual control knob.
9. The pressure-precision output device of a liquid medium for pressure-meter measurement-precision detection according to claim 1, characterized in that the controller includes: PLC, singlechip.
10. The pressure-precision output device of a liquid medium for pressure-meter measurement-precision detection according to claim 2, characterized in that the type of the motor includes: servo motor, step motor.
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| CN202120502584.8U CN214200488U (en) | 2021-03-09 | 2021-03-09 | Pressure precision output device of liquid medium for pressure instrument measurement precision detection |
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| CN202120502584.8U CN214200488U (en) | 2021-03-09 | 2021-03-09 | Pressure precision output device of liquid medium for pressure instrument measurement precision detection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113029434A (en) * | 2021-03-09 | 2021-06-25 | 江南大学 | Pressure control system and method of liquid medium for measuring precision detection of pressure instrument |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113029434A (en) * | 2021-03-09 | 2021-06-25 | 江南大学 | Pressure control system and method of liquid medium for measuring precision detection of pressure instrument |
| WO2022188308A1 (en) * | 2021-03-09 | 2022-09-15 | 江南大学 | Pressure control system and method for liquid medium for measurement accuracy testing of pressure meter |
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