CN216593940U

CN216593940U - Pressure measuring pipe exhaust device

Info

Publication number: CN216593940U
Application number: CN202123236118.9U
Authority: CN
Inventors: 任长江; 姚莉; 李金波; 顾信钦; 官子愈; 姚馨贝; 徐心语; 高旭辉; 朱晓明
Original assignee: Nanchang Institute of Technology
Current assignee: Nanchang Institute of Technology
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-05-24
Anticipated expiration: 2031-12-22

Abstract

The invention provides a pressure measuring pipe exhaust device which comprises a water supply circulation system and a measuring system. The user can set up a plurality of observation holes in the model main part according to the demand, including horizontal, vertical or each different positions to through the surface of water reading of the pressure-measuring pipe direct reading of having the differentiation scale, convenient and fast, the practicality is strong. The bottom of the pressure measuring pipe is provided with the exhaust assembly, the structure is simple, the operation is convenient, the pressure measuring pipe with water columns or bubbles can be exhausted, and the measurement error caused by unsmooth gas exhaust in the traditional pressure measuring pipe is avoided.

Description

Pressure measuring pipe exhaust device

Technical Field

The invention belongs to the field of hydraulic engineering hydraulics, and particularly relates to an exhaust device of a piezometer tube.

Background

The hydraulic model test is a test technology for replaying water flow similar to a prototype in a scale-reduced model to research various hydraulic problems of a hydraulic building. In the arrangement of the test system, the measurement of the hydrodynamic pressure is an essential key link, and is related to the safety design and arrangement of related hydraulic buildings and the like.

At present, the measurement of the hydrodynamic pressure in a hydraulic model test is based on a communicating vessel principle, and generally adopts the measurement of a pressure measuring tube, and comprises the steps of pressure measuring tube arrangement, pressure measurement reading, data arrangement and the like. Therefore, the distribution relation of the pressure of the hydraulic structure along the way can be obtained. However, the method has certain defects, firstly, each pressure measuring pipe is required to be subjected to exhaust treatment before the test, particularly, the conventional exhaust method in winter is not obvious in gas exhaust effect and can cause obvious side face errors, secondly, the turbulence of water flow can cause the up-and-down turbulence at the lowest part of the concave liquid level of the pressure measuring pipe, and the most accurate reading position is difficult to find during reading, so that certain errors are caused.

Disclosure of Invention

The invention provides an exhaust device of a piezometer tube, which is used for solving the technical problem in the background technology.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a pressure measuring pipe exhaust device comprises a water supply circulation system and a measuring system:

the water supply circulating system comprises a water levelling tower, a water tank, a model main body, a tail water channel, a water return channel, a water measuring weir, an underground reservoir and a water pump; the water tank is connected to one end of the model main body, the other end of the model main body is connected with the water metering weir through the tailrace and the return channel, water in the water tank sequentially passes through the model main body, the tailrace, the return channel and the water metering weir and then reaches the underground reservoir, the water inlet of the water pump is connected with the underground reservoir, and the water outlet of the water pump is connected with the water leveling tower.

The measuring system is a pressure measuring pipe array consisting of a plurality of pressure measuring pipes, the pressure measuring pipes are vertically arranged, an exhaust assembly is arranged at the bottom of the pressure measuring pipes, and the pressure measuring pipes are arranged on the model main body in parallel through connecting pipes.

Further, the connecting pipe is a rubber hose.

Furthermore, the exhaust assembly is of a cylinder structure, an exhaust cavity with a circular transverse section and a ball capable of moving up and down along the exhaust cavity are arranged inside the exhaust assembly, and the upper end of the exhaust cavity is provided with a pressure measuring pipe interface.

The outside of the side wall of the exhaust assembly is provided with a control piece for controlling the movement of the ball, and the side wall of the exhaust assembly is provided with a hose connector for connecting with a rubber hose.

Furthermore, the material of the ball is stainless steel, and the control piece is a magnet; the magnet is fixed outside the side wall of the exhaust assembly in a magnetic attraction mode and controls the ball to move up and down along the exhaust cavity.

Furthermore, the diameter of the ball is larger than the caliber of the hose connector, so that the ball is prevented from falling into the connecting pipe from the hose connector.

Furthermore, a graduated scale is arranged on the pipe wall of the piezometric pipe.

Compared with the prior art, the invention has the beneficial effects that:

1. the user can set up a plurality of observation holes in the model main part as required, including horizontal, vertical or each different position to through the surface of water reading of the pressure-measuring pipe direct reading of the pressure-measuring pipe that has the differentiation scale, convenient and fast, the practicality is strong.

2. Water in the pressure-measuring pipe easily forms and cuts off bubble or gas column under the effect of surface tension, and the user carries out exhaust treatment through spring discharge valve to the pressure-measuring pipe, avoids causing measuring error because of having gas column or bubble in the pressure-measuring pipe. Simultaneously, each pressure-measuring pipe bottom all is equipped with the exhaust subassembly, and the user can only carry out exhaust treatment to the pressure-measuring pipe that has the bubble, and need not to carry out unified exhaust to all pressure-measuring pipes, has advantages such as high efficiency, easy operation, labour saving and time saving.

3. The exhaust assembly is simple in structure and convenient to operate. The user passes through the control part control ball and moves upwards to break away from the exhaust chamber, at this moment, the water column that has the bubble in the piezometer pipe flows through the exhaust chamber under the effect of gravity.

4. One end of the model main body is connected with the water tank, and the other end is connected with the water measuring weir through the tail water channel and the return water channel. Water in the water tank arrives underground return system after looping through model main part, tailrace, return water canal and measuring weir, avoids in time getting back to the reservoir because of rivers to influence the formation of steady flow, the measuring error who causes.

Drawings

FIG. 1 is a schematic view of a water supply circulation system;

in the figure, the direction of the arrow is the direction of water flow

FIG. 2 is a schematic view of the exhaust assembly;

FIG. 3 is a schematic view of a measurement system;

in the figure, 1, a water levelling tower, 2, a water tank, 3, a model body, 4, a pressure measuring pipe array, 5, a tail water channel, 6, a water return channel, 7, a water measuring weir, 8, an underground reservoir, 9, a water pump, 10, an exhaust assembly, 11, a pressure measuring pipe, 12 and a connecting pipe are arranged;

10-1, a pressure measuring pipe interface 10-2, a hose interface 10-3, a ball 10-4 and a control piece.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A pressure measuring pipe exhaust device comprises a water supply circulation system and a measuring system.

As shown in fig. 1 to 3, the water supply circulation system includes a water-open tower 1, a water tank 2, a mold body 3, a tailrace 4, a return canal 5, a measuring weir 6, an underground reservoir 7, and a water pump 8. The utility model discloses a water supply system, including model main body 3, water tank 2, backwater channel 4, backwater channel 5, weir 6, backwater weir 6, underground reservoir 7 is connected to the water inlet of water pump 8, and the delivery port passes through aqueduct connection water tower 1, finally reaches water supply cycle's purpose, water tank 2 is connected to the one end of model main body 3, and the other end passes through tailrace 4, backwater channel 5 and connects weir 6, weir 6 is the rectangle weir, water in the water tank 2 loops through model main body 3, tailrace 4, backwater channel 5 and weir 6 after reachs underground reservoir 7, water pump 8's water inlet connects underground reservoir 7, and the delivery port passes through aqueduct connection water tower 1.

The measuring system is a pressure measuring pipe array 4 consisting of a plurality of pressure measuring pipes 11, the pressure measuring pipes 11 are vertically arranged, an exhaust assembly 10 is arranged at the bottom of the pressure measuring pipes, and the pressure measuring pipes are arranged on the model main body 3 in parallel through connecting pipes 12.

As shown in fig. 2, the exhaust assembly 10 is a regular hexagonal cylinder structure, and is internally provided with an exhaust cavity with a circular transverse section and a ball 10-3 capable of moving up and down along the exhaust cavity, and the upper end of the exhaust cavity is provided with a pressure tube interface 10-1. A control member 10-4 for controlling the movement of the ball 10-3 is arranged outside the side wall of the exhaust assembly 10, and a hose connector 10-2 for connecting with a rubber hose is arranged on the side wall of the exhaust assembly 10.

In the structure, the material of the ball 10-3 is stainless steel, and the control piece 10-4 is a magnet. The magnet is fixed outside the side wall of the exhaust component 10 in a magnetic attraction mode, and controls the ball 10-3 to move up and down along the exhaust cavity.

It should be noted that the piezometer tube 11 is made of organic glass material, and the wall of the tube is provided with a graduated scale which divides mm scales, so as to meet the requirements of conventional tests. The pressure measuring pipe interface 10-1 and the hose interface 10-2 are connected with a pressure measuring pipe 11 and a connecting pipe 12 in a bolt fixing mode.

It should be understood that the structure of the exhaust assembly 10 is not limited to a regular hexagonal cylinder structure, and may be other cylinder structures such as a regular triangle or a regular pentagon. The preferred embodiment is a regular hexagonal cylinder structure, which is beautiful and facilitates the fixing of the control member 10-4 to the outside of the sidewall.

It should be understood that the pressure sensing tube 11 shown in FIG. 3 is mounted in one of many embodiments. The model main body 3 is a pressure pipe, the pipeline is full of water flow after the test begins, the inner wall of the pipeline bears the pressure of the test water flow, and in order to observe the hydrodynamic pressure of the pipeline with different measuring points of the model main body 3, a user sets measuring points at different positions of the model main body 3 according to the test requirements and is connected with the test pipe 11.

It should be noted that the connecting pipe 12 is a rubber hose, and has high wear resistance, high bending degree, high strength and no deformation. The diameter of the ball 10-3 is larger than the caliber of the hose connector 10-2, so that the ball 10-3 is prevented from falling into the connecting pipe 12 from the hose connector 10-2 to affect the test.

The method comprises the following specific operation steps:

s1, water injection and air exhaust of the pressure measuring pipe:

and S1-1, when the piezometer tube is provided with an air column or air bubbles, the control piece is moved upwards, and the ball moves synchronously along with the control piece under the magnetic action. When the ball is separated from the exhaust cavity and enters the pressure measuring pipe, water with bubbles or air columns in the pressure measuring pipe flows out from the bottom of the exhaust cavity under the action of gravity.

And S1-2, when the water in the pressure measuring pipe is exhausted, the control piece is moved downwards and drives the ball to move to the initial position. At the moment, the hose connector is opened, and the water body enters the piezometer tube through the hose connector again.

S2 hydrodynamic pressure measurement:

and S2-1, according to the flow demand, opening the corresponding water pump, adjusting the valve control water head, reading the reading of the measuring probe of the downstream rectangular water measuring weir after the water flow is stable, and drawing a water level-flow characteristic curve.

And S2-2, observing the water flow state in the water tank scale and the model main body, so that the water flow forms stable constant flow. The flow and water level corresponding to the hydrodynamic pressure were tested.

And S2-3, when the water flows through the model main body, recording and storing the data measured by the piezometer tube.

S3 test water reflux:

and after the test is finished, the valve and the water pump are closed, and redundant water in the model main body, the tail water channel and the water return channel flows back to the underground reservoir.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The pressure measuring pipe exhaust device is characterized by comprising a water supply circulation system and a measuring system;

the water supply circulating system comprises a water levelling tower, a water tank, a model main body, a tail water channel, a water return channel, a water measuring weir, an underground reservoir and a water pump; the water tank is supplied with water by the water levelling tower through a water guide pipe, one end of the model main body is connected with the water tank, the other end of the model main body is connected with the water measuring weir through the tail water channel and the water return channel, water in the water tank sequentially passes through the model main body, the tail water channel, the water return channel and the water measuring weir and then reaches the underground reservoir, the water inlet of the water pump is connected with the underground reservoir, and the water outlet of the water pump is connected with the water levelling tower;

2. The pressure measuring tube venting device according to claim 1, wherein said connecting tube is a rubber hose.

3. The pressure measuring pipe exhaust device according to claim 1, wherein the exhaust assembly is of a cylindrical structure, an exhaust cavity with a circular transverse section is formed inside the exhaust assembly, a ball bearing capable of moving up and down along the exhaust cavity is arranged inside the exhaust assembly, and the upper end of the exhaust cavity is a pressure measuring pipe connector;

4. The piezometer tube air-discharge device according to claim 3, wherein the material of said ball is stainless steel, and said control member is a magnet; the magnet is fixed outside the side wall of the exhaust assembly in a magnetic attraction mode and controls the ball to move up and down along the exhaust cavity.

5. The pressure measuring tube venting device according to claim 4, wherein the diameter of the ball is larger than the diameter of the hose port to prevent the ball from falling out of the hose port into the connection tube.

6. The pressure measuring tube exhaust apparatus according to claim 1, wherein a graduated scale is provided on the wall of the pressure measuring tube.