CN210014829U - Micro-pressure instrument calibration device based on liquid level change - Google Patents

Abstract

The utility model provides a minute-pressure instrument calibration equipment based on liquid level changes mainly relates to the accurate calibration equipment field of minute-pressure instrument. Minute-pressure instrument calibration equipment based on liquid level variation, including the base, set up the liquid supply source on the base, set up the stand-off on the liquid supply source, connect the tee bend on the stand-off, one of them interface connection liquid level change pipe of tee bend, set up level sensor in the liquid level change pipe, a plurality of detection joint of another interface connection of tee bend, detection joint department sets up the valve, and minute-pressure instrument calibration equipment based on liquid level variation still includes the controller, the controller is connected with the level sensor electricity. The beneficial effects of the utility model reside in that: the utility model discloses can calculate the pressure under the liquid level this moment through the liquid level change, supplementary standard table accomplishes the check-up work of micro-pressure meter, and the result is more accurate, provides the reference under other check-up principles for the check-up work of micro-pressure meter.

Description

Micro-pressure instrument calibration device based on liquid level change

Technical Field

The utility model relates to a minute-pressure instrument accurate calibration equipment field specifically is minute-pressure instrument calibration equipment based on liquid level changes.

Background

The micro-pressure meter is used for measuring the pressure value less than 60000Pa, so the measuring range is smaller. When oil and gas exploitation is carried out, a large amount of micro-pressure meters are used on each auxiliary pipeline. According to different use environments, the micro-pressure meter needs to be centrally checked every 3-6 months. At present, the calibration of the pressure gauge is carried out through comparison of the standard gauges, only one calibration mode is adopted, the standard gauges are long in service time, the reading of each standard gauge has certain errors, and in view of the safety responsibility, the laboratory designs equipment for calibrating the micro-pressure gauge by using the liquid level difference, so that the micro-pressure gauge can be accurately calibrated, and the standard gauges are assisted to more accurately complete calibration of the micro-pressure gauge.

SUMMERY OF THE UTILITY MODEL

For solving prior art's not enough, the utility model provides a minute-pressure instrument calibration equipment based on liquid level change, it can calculate the pressure under the liquid level this moment through the liquid level change, and the check-up work of minute-pressure meter is accomplished to supplementary standard table, and the result is more accurate, provides the reference under other check-up principles for the check-up work of minute-pressure meter.

The utility model discloses a realize above-mentioned purpose, realize through following technical scheme:

minute-pressure instrument calibration equipment based on liquid level change, which comprises a base, set up the liquid supply source on the base, set up the stand-off on the liquid supply source, connect the tee bend on the stand-off, one of them interface connection liquid level change pipe of tee bend, liquid level change pipe perpendicular to horizontal plane is towards the top, liquid level change pipe one side sets up the support, the support is used for right liquid level change pipe carries on spacingly, the intraductal level sensor that sets up of liquid level change, a plurality of detection joint of another interface connection of tee bend, detection joint department sets up the valve, minute-pressure instrument calibration equipment based on liquid level change still includes the controller, the controller is connected with the liquid level sensor electricity.

The liquid supply source is a water bag, the water bag is a soft water bag, a one-way liquid injection port is formed in the water bag, a barrel is arranged on the outer side of the water bag, the bottom of the barrel is fixedly connected with a base, a piston is arranged at the top of the barrel, an external thread is arranged on a piston handle of the piston, a threaded sleeve fixedly connected with the barrel is arranged above the barrel, and the external thread on the piston handle is matched with the threaded sleeve.

The liquid level change pipe is a transparent pipe.

The liquid in the liquid supply source is color developing liquid.

The liquid level sensor is an ultrasonic liquid level sensor or a photoelectric liquid level sensor.

Contrast prior art, the beneficial effects of the utility model are that:

the utility model discloses a liquid supply source detects the change of liquid level in the liquid level change pipe through level sensor as pressure provides the device, through density, the gravity acceleration under the inquiry local height above sea level that detect liquid, calculates the pressure this moment through formula P ═ ρ gh. Through more accurate calculation, the micro-pressure meter can be verified by the more accurate auxiliary standard meter, and a micro-pressure meter verification mode under another verification principle is provided.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Reference numerals shown in the drawings: 1. a base; 2. a liquid supply source; 3. a lead-out pipe; 4. a liquid level changing pipe; 5. a support; 6. a liquid level sensor; 7. detecting the joint; 8. a valve; 9. a controller; 10. a water bladder; 11. a barrel; 12. a piston.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope defined in the present application.

As shown in FIG. 1, minute-pressure instrument calibration equipment based on liquid level change, including base 1, set up the liquid supply source 2 on the base 1, the base is as the fixed part in liquid supply source, the liquid supply source provides power for the liquid level change of this device. The liquid supply source 2 is provided with an eduction tube 3, the eduction tube 3 is connected with a tee joint, one of the interfaces of the tee joint is connected with a liquid level change tube 4, the liquid level change tube 4 is vertical to the horizontal plane and faces upwards, and when the liquid supply source is started to extrude liquid, the liquid can rise in the liquid level change tube. A support 5 is arranged on one side of the liquid level change pipe 4, and the support 5 is used for limiting the liquid level change pipe 4 to ensure that the liquid level change pipe is vertical. And a liquid level sensor 6 is arranged in the liquid level change pipe 4 and is used for detecting the liquid level height in the liquid level change pipe. The other interface of the tee joint is connected with a plurality of detection joints 7, and the detection joints are used for installing a micro-pressure meter to be detected and a standard meter. The detection joint 7 is provided with a valve 8, the micro-pressure instrument calibration device based on liquid level change further comprises a controller 9, and the controller 9 is electrically connected with the liquid level sensor 6.

Specifically, the liquid supply source 2 is a water bag 10, the water bag 10 is a soft water bag, a one-way liquid injection port is formed in the water bag 10, and liquid for detection is injected into the water bag through the one-way liquid injection port. The water bag comprises a water bag 10 and is characterized in that a cylinder body 11 is arranged on the outer side of the water bag 10, the bottom of the cylinder body 11 is fixedly connected with a base 1, a piston 12 is arranged at the top of the cylinder body 11, an external thread is arranged on a piston handle of the piston 12, a threaded sleeve fixedly connected with the cylinder body 11 is arranged above the cylinder body 11, and the external thread on the piston handle is matched with the threaded sleeve. Through the cooperation of piston handle and swivel nut, screw up the piston handle on the swivel nut, can make the piston push down gradually in leading to the body, reduce the water pocket compression in the barrel, make the liquid in the water pocket extruded and go out, make the liquid level in the liquid level change pipe rise to be used in the area that detects the joint and detect little manometer and standard table. Through the screw thread precession mode, can make the liquid in the water pocket be extruded by even, make the change of manometer, the liquid level change in the liquid level change pipe slowly and even.

Specifically, the liquid level change pipe 4 is a transparent pipe. Through the transparent tube, the liquid level change in the liquid level change tube can be observed by naked eyes, and reference is provided for adjustment of the liquid supply source.

Specifically, the liquid in the liquid supply source 2 is a color developing liquid. Through the color-developing liquid, the liquid level change condition in the liquid level change pipe can be observed more obviously by an operator.

Specifically, the liquid level sensor is an ultrasonic liquid level sensor or a photoelectric liquid level sensor. The two liquid level sensors can be arranged above the liquid level without being arranged in the liquid, so that the size of the liquid level change pipe can be reduced, the interference of the sensors to the liquid level is avoided, and the detection result is more accurate.

Example 1:

the micro-pressure instrument calibration device based on liquid level change comprises a base 1, wherein the base is made of metal or wood and is square. Set up on the base 1 and supply liquid source 2, in this embodiment supply liquid source 2 is water pocket 10, water pocket 10 is soft rubber water pocket, the one-way liquid mouth of annotating that has on the water pocket 10, through annotating the liquid mouth to annotate the water that contains red pigment into in the water pocket. The water bag 10 outside sets up barrel 11, barrel 11 bottom and 1 screw fixed connection of base, barrel 11 top sets up piston 12, the piston bottom surface contacts with the water bag, set up the external screw thread on the piston handle of piston 12, barrel 11 top sets up the swivel nut with barrel 11 fixed connection, external screw thread on the piston handle cooperatees with the swivel nut. The liquid supply source 2 is connected with the eduction tube 3, the eduction tube can be connected with an eduction valve in series, and when water is injected into the water sac, the eduction valve is closed, so that the liquid can be injected into the water sac more conveniently. The three-way pipe is connected to the eduction pipe 3, one interface of the three-way pipe is in threaded connection with the liquid level change pipe 4, and the liquid level change pipe is a transparent plastic pipe. In the embodiment, the liquid level change pipe is 4.1 meters, and the micro-pressure gauge measuring range within 4Kpa can be subjected to auxiliary verification. The liquid level changes 4 perpendicular to horizontal plane upsides, liquid level changes 4 one sides of pipe and sets up support 5, the support passes through the bolt fastening with ground. The bracket 5 is used for fixing the liquid level change pipe 4. Set up level sensor 6 in the liquid level change pipe 4, level sensor is ultrasonic wave level sensor or photoelectric liquid level sensor, adopts photoelectric liquid level sensor in this embodiment, photoelectric liquid level sensor settles at liquid level change pipe top. The other interface of the tee joint is connected with three detection joints 7, the detection joints 7 are connected with valves 8 in series, the micro-pressure instrument calibration device based on liquid level change further comprises a controller 9, and the controller 9 is electrically connected with the liquid level sensor 6. The controller can adopt a microprocessor and also can adopt a single chip microcomputer, the single chip microcomputer is adopted in the embodiment, and when the single chip microcomputer is adopted, a liquid crystal display screen is required to be connected in series for displaying the reading detected by the liquid level sensor.

When the liquid level sensor is used, water for dissolving red pigment is injected into the water bag at first, then the piston or the piston is screwed into the cylinder, all valves are opened, the piston is screwed, liquid just flows out of the detection joint, then the valve is closed, the pressure gauge to be detected and the standard gauge are connected into the detection joint, and the current liquid level value detected by the liquid level sensor is recorded. Then the valve is opened, the piston is slowly screwed, the piston compresses the water sac, at the moment, the water sac can move to the next integer by referring to the reading of the standard meter, and the liquid level value at the moment is recorded. And calculating the liquid level change pressure at the moment through the liquid level difference to serve as a reference for verifying the micro-pressure meter. And then repeating the steps of screwing the piston and recording data, and carrying out a plurality of times of verification on the micro-pressure meter.

Example 2:

for embodiment 1, when the controller adopts a microprocessor, the formula is programmed by a PC, when liquid just flows out at the detection joint, the valve is closed, the pressure gauge to be detected and the standard gauge are connected to the detection joint, the current liquid level value detected by the liquid level sensor is recorded, and the current liquid level value is a return-to-zero value. When the liquid level changes along with the continuous verification of the micro-pressure meter, a real-time pressure value is automatically calculated and displayed on the PC according to the gravity acceleration constant and the liquid density which are input in advance.

Claims (5)

1. Minute-pressure instrument calibration equipment based on liquid level change, including base (1), characterized by: set up on base (1) and supply liquid source (2), set up stand-off (3) on the liquid source of supply (2), connect the tee bend on stand-off (3), one of them interface connection liquid level change pipe (4) of tee bend, liquid level change pipe (4) perpendicular to horizontal plane is towards the top, liquid level change pipe (4) one side sets up support (5), support (5) are used for right liquid level change pipe (4) carry on spacingly, set up level sensor (6) in liquid level change pipe (4), a plurality of detection joint (7) of another interface connection of tee bend, detection joint (7) department sets up valve (8), and micropressure instrument calibration equipment based on liquid level change still includes controller (9), controller (9) are connected with level sensor (6) electricity.

2. The micro-pressure instrument calibration device based on liquid level change as claimed in claim 1, wherein: the utility model discloses a liquid supply device, including liquid supply source (2), water bag (10), barrel (11) bottom and base (1), supply liquid source (2) to be water bag (10), water bag (10) are soft water bag, set up one-way notes liquid mouth on water bag (10), water bag (10) outside sets up barrel (11), barrel (11) bottom and base (1) fixed connection, barrel (11) top sets up piston (12), set up the external screw thread on the piston handle of piston (12), barrel (11) top sets up the swivel nut with barrel (11) fixed connection, the external screw thread on the piston handle suits with the swivel nut.

3. The micro-pressure instrument calibration device based on liquid level change as claimed in claim 1, wherein: the liquid level change pipe (4) is a transparent pipe.

4. The micro-pressure instrument calibration device based on liquid level change as claimed in claim 3, wherein: the liquid in the liquid supply source (2) is color developing liquid.

5. The micro-pressure instrument calibration device based on liquid level change as claimed in claim 1, wherein: the liquid level sensor is an ultrasonic liquid level sensor or a photoelectric liquid level sensor.

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