CN219757611U - Pore water pressure gauge check-up equipment - Google Patents

Abstract

The utility model relates to pore water pressure gauge verification equipment, which comprises a piston press, a vacuum pump, a pressure tank, a measuring instrument and a pressure gauge, wherein the pressure tank comprises a tank body, a tank cover and a mounting frame, the tank cover is covered at a port of the tank body to form a sealing cavity, the mounting frame is arranged in the tank body, a water pressure gauge to be measured is arranged on the mounting frame, the water pressure gauge to be measured is electrically connected with the measuring instrument through a wire harness, the pressure gauge is arranged on the tank cover and is used for detecting the air pressure in the sealing cavity, the piston press and the vacuum pump are communicated with the pressure tank through pipelines, and regulating valves are arranged at the joints of the pipelines with the piston press and the vacuum pump. The piston press for pressurization and the vacuum pump for pumping the pressure tank to a zero pressure state are integrated, and when the water pressure gauge to be detected is immersed into water for detection, the accuracy of a detection result is improved.

Description

Pore water pressure gauge check-up equipment

Technical Field

The utility model relates to the technical field of engineering metering equipment, in particular to pore water pressure gauge verification equipment.

Background

The pore water pressure gauge is widely applied in the field of water transport engineering, and the accuracy of the measured value of the pore water pressure gauge has a great influence on the quality of the water transport engineering. The steel string type pore water pressure gauge is one of the pore water pressure gauges with the greatest social conservation amount and the most extensive application, and is used for knowing the strength and deformation of a soft foundation and the property change conditions of soil in different periods in the engineering construction process, analyzing the reinforcing effect of the soft foundation, providing scientific monitoring data for owners and supervision units, so that a detection unit can master the construction quality in reinforcing engineering, and enhancing the engineering quality control of vacuum preloading. At present, when the water pressure is verified, the verification is carried out according to JJG (traffic) 029-2004 steel string pore water pressure gauge verification rules, such as application number 201821705473.1, a water pressure verification method is disclosed, but the initial air pressure in a pressure tank is not regulated by the water pressure immersion verification method, so that the verification precision is reduced, and the accuracy of a detection result is affected.

Disclosure of Invention

Based on this, it is necessary to provide a pore water pressure gauge verification device that addresses the above-described issues.

The utility model provides a pore water pressure gauge check-up equipment, includes piston press, vacuum pump, overhead tank, measuring apparatu and manometer, the overhead tank includes the jar body, tank cover and mounting bracket, the tank cover closes in jar body port department, constitutes a seal chamber, the mounting bracket is installed in the jar internally, and the water pressure gauge that awaits measuring is installed on the mounting bracket, the water pressure gauge that awaits measuring passes through the pencil and is connected with the measuring apparatu electricity, the manometer is installed on the tank cover, is used for detecting atmospheric pressure in the seal chamber, piston press and vacuum pump are the intercommunication through pipeline and overhead tank, the governing valve is all installed in the junction with piston press and vacuum pump to the pipeline.

Preferably, a sealing rubber ring is further arranged at the joint of the tank body and the tank cover.

Preferably, the inner wall of the tank body is also provided with vertical ribs.

Preferably, a drain valve is arranged at the bottom of the tank body.

Preferably, a sealing joint is further arranged on the tank cover, and the wire harness penetrates through the sealing joint and connects the measuring instrument with the water pressure gauge to be measured.

The utility model has the advantages that: the piston press for pressurization and the vacuum pump for pumping the pressure tank to a zero pressure state are integrated, and when the water pressure gauge to be detected is immersed into water for detection, the accuracy of a detection result is improved.

Drawings

FIG. 1 is a schematic perspective view of a pore water pressure gauge calibration apparatus according to one embodiment;

FIG. 2 is an exploded schematic view of a pore water pressure gauge calibration apparatus.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1-2, a pore water pressure gauge verification device comprises a piston press 1, a vacuum pump 2, a pressure tank 3, a measuring instrument 4 and a pressure gauge 5, wherein the pressure tank 3 comprises a tank body 31, a tank cover 32 and a mounting frame 33, the tank cover 32 is covered at a port of the tank body 31 to form a sealing cavity, the mounting frame 33 is arranged in the tank body 31, a water pressure gauge 100 to be tested is arranged on the mounting frame 33, the water pressure gauge 100 to be tested is electrically connected with the measuring instrument 4 through a wire harness 101, the pressure gauge 5 is arranged on the tank cover 32 and used for detecting air pressure in the sealing cavity, the piston press 1 and the vacuum pump 2 are communicated with the pressure tank 3 through a pipeline 6, and regulating valves are arranged at joints of the pipeline 6 and the piston press 1 and the vacuum pump 2. Specifically, in the present embodiment, during measurement, first, liquid is injected into the pressure tank 3, and the water pressure gauge 100 to be measured is immersed in the liquid, the liquid injected into the pressure tank 3 does not fill the tank, and a certain gap exists between the liquid surface and the tank cover 32. And in order to adapt to the water pressure gauges 100 to be measured with different specification models, the mounting frame 33 is arranged in the tank body 31, and the position of the mounting frame 33 in the vertical direction is adjustable, so that the water pressure gauges 100 to be measured with different length models can be completely immersed in liquid in the vertical direction. After preparation is completed, the vacuum pump 2 starts to work by using the cover 32 to cover, the pressure tank 3 is pumped to a zero pressure state through the pipeline 6, and the pressure meter 5 can detect the pressure state in the pressure tank 3 in real time. At this time, because the pipeline 6 is Y-shaped, the regulating valve of the pipeline 6 communicated with the vacuum pump 2 is opened, and the regulating valve communicated with the piston press 1 is closed, after the pressure tank 3 is pumped to zero pressure and maintained for a certain time, the piston press 1 is selected to pre-press the full range pressure value for 3 times, each time is 5min apart, then a formal test is carried out, the pressure increment of 10%F.S is taken in the measuring range to be separated by two points, the pressure is gradually pressurized to the full range, and after each stage of pressure is maintained for at least 1min, the output frequency value of the water pressure gauge 100 to be measured is read by the measuring instrument 4. The zero pressure pumping step is added in the measuring process, and the vacuum pump 2 is used for realizing the zero pressure pumping step, so that the checking accuracy is greatly improved.

As shown in fig. 2, a sealing rubber ring 311 is further disposed at the joint of the can body 31 and the can cover 32, the can body 31 is detachably connected with the can cover 32 through bolts, and the sealing rubber ring 311 is used for enhancing the air tightness of the joint and preventing air leakage.

As shown in fig. 2, the inner wall of the tank 31 is further provided with vertical ribs 312, which not only can be used for enhancing the structural strength of the tank 31, but also can keep the outer wall of the tank 31 smooth, so that the tank is convenient to carry in a case.

As shown in fig. 1-2, a drain valve 313 and a base 314 are provided at the bottom of the tank 31. Specifically, after the measurement is completed, the drain valve 313 is opened to drain the liquid in the tank 31, so as to avoid accumulation of the liquid in the tank 31, and the inner wall of the tank 31 made of metal is easy to rust. And the base 314 can enable the tank body 31 to be erected on a horizontal table top, so that measurement is facilitated.

As shown in fig. 2, the tank cover 32 is further provided with a sealing joint 321, and the wire harness 101 penetrates through the sealing joint 321 to connect the measuring instrument 4 with the water pressure gauge 100 to be measured. Specifically, the sealing joint 321 may be used to improve the air tightness with the wire harness 101, and prevent air from leaking out from the connection between the wire harness 101 and the can cover 32 during calibration, resulting in a reduced inspection accuracy.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (5)

1. The utility model provides a pore water pressure gauge check-up equipment which characterized in that: including piston press, vacuum pump, overhead tank, measuring apparatu and manometer, the overhead tank includes the jar body, cover and mounting bracket, the cover closes in jar body port department, constitutes a sealed chamber, the mounting bracket is installed in the jar body, and the hydrogauge that awaits measuring is installed on the mounting bracket, the hydrogauge that awaits measuring passes through the pencil and is connected with the measuring apparatu electricity, the manometer is installed on the cover, is used for detecting the atmospheric pressure in the sealed chamber, piston press and vacuum pump are linked together through pipeline and overhead tank, the governing valve is all installed in the junction with piston press and vacuum pump to the pipeline.

2. A pore water pressure gauge verification apparatus as claimed in claim 1, wherein: the junction of the tank body and the tank cover is also provided with a sealing rubber ring.

3. A pore water pressure gauge verification apparatus as claimed in claim 2, wherein: the inner wall of the tank body is also provided with vertical ribs.

4. A pore water pressure gauge verification apparatus as claimed in claim 3, wherein: the bottom of the tank body is provided with a drain valve and a base.

5. A pore water pressure gauge verification apparatus as claimed in claim 1 or 4, wherein: and the tank cover is also provided with a sealing joint, and the wire harness penetrates through the sealing joint and is connected with the measuring instrument and the water pressure gauge to be measured.