CN213600498U

CN213600498U - Concrete pressure test device

Info

Publication number: CN213600498U
Application number: CN202021732607.6U
Authority: CN
Inventors: 潘广明; 刘宪杰; 相立峰; 于洋; 张华军; 陈会勇; 孙丽; 李栋栋
Original assignee: LUXI INDUSTRY EQUIPMENT CO LTD
Current assignee: LUXI INDUSTRY EQUIPMENT CO LTD
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2021-07-02
Anticipated expiration: 2030-08-18

Abstract

The utility model relates to a concrete pressure test device, including compression testing machine, control system and terminal display system, the control system includes pressure sensor, displacement sensor and controller, pressure sensor can measure the pressure that the concrete sample bore, displacement sensor can measure the distance between support column up end and the lower terminal surface of pressure part to the deformation of representation concrete sample; the controller can acquire the numerical values of the displacement sensor and the pressure sensor in real time to form a stress-strain curve of the concrete sample to the terminal display system.

Description

Concrete pressure test device

Technical Field

The utility model belongs to the technical field of the concrete test, concretely relates to concrete pressure test device and method.

Background

At present, a pressure tester is widely applied to detection of infrastructure construction in China and is used for testing the compressive strength of concrete. Specifically, the concrete sample is clamped and fixed by a supporting seat generally, then a piston rod of a hydraulic cylinder stretches to complete pressurization of the concrete sample, a pressure sensor is arranged at the end face of the piston rod or the upper end face of the supporting seat, the pressure borne by the concrete sample is measured constantly, when the concrete sample is observed to be damaged visually, pressurization is stopped, the piston rod retracts, the concrete sample is taken out, a pressure curve graph output by a controller is observed, the numerical value during sudden pressure drop is the maximum pressure borne by the concrete sample, and the compressive strength is converted according to the compressed area.

However, the inventor thinks that in the existing test process, the oil pump, the oil supply valve, the overflow valve, the return valve and the like of the testing machine are manually operated; the pressure change in the test process needs manual recording, and results are processed and analyzed manually.

Meanwhile, the existing concrete compression testing machine can only obtain the relation curve of stress and time generally, and can not output the relation curve of stress and strain.

Disclosure of Invention

The utility model aims at providing a concrete pressure test device realizes the experimental automatic pressurization of concrete test block, pressure signal automatic acquisition and output, reduces personnel's participation, improves the purpose of data authenticity and reliability in the testing process.

In order to achieve the above object, one or more embodiments of the present invention provide a concrete pressure test device, including pressure test machine, control system and terminal display system, control system includes pressure sensor, displacement sensor and controller, pressure sensor can measure the pressure that the concrete sample bore, and displacement sensor can measure the distance between the terminal surface under support column up end and the pressure component to the deformation of sign concrete sample. The controller can acquire the numerical values of the displacement sensor and the pressure sensor in real time to form a stress-strain curve of the concrete sample to the terminal display system.

The beneficial effects of one or more of the above technical solutions are as follows:

the method that the pressure sensor and the displacement sensor are matched for use is adopted, the relation between pressure and deformation when the concrete sample is pressed can be measured in real time, and a stress-strain relation curve is conveniently established; on the basis of a traditional stress curve, the structural strength characteristic of the concrete is represented more accurately.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

Fig. 1 is a schematic connection diagram of an integrated device according to an embodiment of the present invention;

in the figure: 1. a pressure sensor; 2. an oil tank; 3. a pressure relief valve; 4. an oil pump; 5. an overflow valve; 6. a servo control valve; 7. a display; 8. a data module; 9. an oil filter valve; 10. and a controller.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. 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 application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

In a typical embodiment of the present invention, as shown in fig. 1, the present invention provides a concrete pressure testing apparatus, which comprises a pressure testing machine, a control system and a terminal display system, wherein the control system comprises a pressure sensor 1, a displacement sensor and a controller 10, the pressure sensor 1 can measure the pressure born by a concrete sample, and the displacement sensor can measure the distance between the upper end surface of a support column and the lower end surface of a pressurizing part to represent the deformation of the concrete sample; the controller 10 can collect the values of the displacement sensor and the pressure sensor 1 in real time to form a stress-strain curve of the concrete sample to a terminal display system.

The pressure testing machine comprises an oil pump 4, an oil tank 2 and a hydraulic cylinder, wherein the oil pump 4, the oil tank 2 and the hydraulic cylinder are communicated through oil passages; an electromagnetic valve is installed in the oil circuit, and the controller 10 is in signal connection with the electromagnetic valve in the oil circuit.

A piston rod in the hydraulic cylinder extends vertically downwards, and the lower end face of the piston rod is provided with the pressure sensor 1.

An electromagnetic valve: an oil filtering valve 9 is arranged in the oil path, a servo control valve 6, an overflow valve 5 and a pressure release valve 3 are arranged in the oil path between the oil filtering valve 9 and the hydraulic cylinder, and the oil filtering valve 9 and the servo control valve 6 are respectively in signal connection with a control system; the oil filtering valve 9 is used for filtering impurities in hydraulic oil flowing into a main machine of the pressure testing machine; the servo control valve 6 is used for automatically adjusting the flow. The displacement sensor is arranged on one side of the supporting seat and supported by a frame of the pressure testing machine.

Specifically, the control system further comprises a data module 8, and the data module 8 comprises a data acquisition module and a data output module; the pressure sensor 1 and the displacement sensor are respectively in signal connection with a data acquisition module, the data acquisition module is in signal connection with a data output module, and the data output module can convert received analog signals into digital signals and then transmit the digital signals to the controller 10.

The terminal display system comprises a display 7, and the display 7 is in signal connection with a controller 10. The pressure sensor 1 is installed on the upper end face of the supporting seat. The pressure testing machine comprises a base, and the hydraulic cylinder is installed on the upper end face of the base through a rack.

The embodiment also provides an automatic concrete pressure test method, which comprises the following steps:

step 1, placing a sample test block into a sample placing position of a pressure test, starting a controller, and allowing hydraulic oil in an oil pump 4 in the pressure test machine to flow into a host through an oil delivery pipe.

And 2, filtering impurities of the hydraulic oil in the oil delivery pipe by using an oil filtering valve 9.

And 3, the controller sends control information to the servo control valve 6, and the servo control valve 6 performs pressure stabilization regulation on the flow of the hydraulic oil.

And 4, allowing hydraulic oil to flow into the host to generate pressure in the host, extruding the sample test block, and acquiring a slave force signal in real time by the pressure sensor 1 and converting the pressure signal into a current signal of 4-20 milliamperes.

And 5, acquiring a 4-20 milliampere current signal converted by the pressure sensor 1 in real time by the data module, and uploading the processed signal to the controller.

And 6, after the sample test block in the pressure testing machine is crushed, ending the test, and controlling an oil return valve in the pressure testing machine to be completely opened by a control system to enable all hydraulic oil in the host machine to flow into the oil tank 2 through an oil return pipe.

And 7, converting the received signals into pressure values by the control system, and finally generating a pressure value curve graph.

Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.

Claims

1. A concrete pressure test device is characterized by comprising a pressure test machine, a control system and a terminal display system, wherein the control system comprises a pressure sensor, a displacement sensor and a controller, the pressure sensor can measure the pressure born by a concrete sample, and the displacement sensor can measure the distance between the upper end surface of a support column and the lower end surface of a pressurizing part so as to represent the deformation of the concrete sample; the pressure testing machine comprises an oil pump, an oil tank and a hydraulic cylinder, wherein the oil pump, the oil tank and the hydraulic cylinder are communicated through oil passages; an electromagnetic valve is arranged in the oil way, a piston rod in the hydraulic cylinder vertically extends downwards, and the lower end surface of the piston rod is provided with the pressure sensor;

the controller can acquire the numerical values of the displacement sensor and the pressure sensor in real time to form a stress-strain curve of the concrete sample to the terminal display system.

2. The concrete pressure test device according to claim 1, wherein an oil filter valve is arranged in the oil path, a servo control valve is arranged in the oil path between the oil filter valve and the hydraulic cylinder, and the oil filter valve and the servo control valve are respectively in signal connection with a control system;

the oil filtering valve is used for filtering impurities in hydraulic oil flowing into a main machine of the pressure testing machine; the servo control valve is used for automatically adjusting the flow.

3. The concrete pressure test apparatus according to claim 1, wherein the displacement sensor is provided at one side of the support base, and the displacement sensor is supported by a frame of the pressure tester.

4. The concrete pressure test device according to claim 3, wherein the pressure sensor and the displacement sensor are respectively in signal connection with a data acquisition module, the data acquisition module is in signal connection with a data output module, and the data output module can convert received analog signals into digital signals and transmit the digital signals to the controller.

5. The concrete pressure test apparatus of claim 1, wherein the pressure sensor is mounted on an upper end surface of the support base.

6. The concrete pressure testing apparatus of claim 1, wherein the terminal display system comprises a display, and the display is in signal communication with the controller.

7. The concrete pressure test apparatus according to claim 1, wherein a relief valve is provided in the oil passage.

8. The concrete pressure test device according to claim 1, wherein the pressure test machine comprises a base, and the hydraulic cylinder is mounted on the upper end face of the base through a frame.

9. The concrete pressure test apparatus of claim 1, wherein the controller is in signal communication with a solenoid valve in the oil circuit.