Pressure sensor verification detection device

Abstract

The utility model discloses a pressure sensor verification detection device comprising a gas pressure reducing valve, and one side of a ball valve is connected with an external gas source through the gas pressure reducing valve; the other side of the ball valve is connected with a gas pressurization sealing device with a cylindrical structure; the other side of the gas pressurization sealing device is connected with a high-precision gas pressure gauge, a pressure sensor to be detected is arranged on the inner wall of the top of the gas pressurization sealing device, and the device can solve the problem that in the existing shield construction process, the difficulty of troubleshooting and error confirmation of a soil bin sensor and a grouting pressure sensor of a shield tunneling machine is high; the service life of the sensor can be prolonged; and the actual pressure value of the detected pressure surface can be calculated.

Description

Technical Field

[0001] The utility model relates to the technical field of shield machine soil bin pressure and grouting pressure sensor detection, in particular to a pressure sensor validation detection device. Background Art

[0002] In the current shield construction process, earth pressure balance shield machines and dual-mode shield machines are equipped with soil bin pressure sensors. At the same time, segment assembly shield machines are equipped with synchronous grouting systems, which are also equipped with pressure sensors. In actual engineering, except for equipment manufacturers, construction units have no awareness of pressure sensor validation and simple and rapid detection devices. Depending on the different sensor manufacturers and batches, there may be linear errors between the sensor display value and the actual value of the measured pressure source in the newly purchased sensors of the project. At the same time, there will also be linear errors in the display value during the long-term use of the pressure sensors that have been put into use. In the process of conventional shield construction and equipment maintenance, the technical personnel of the construction unit lack the awareness of sensor validation when entering the site and regular validation after use, resulting in large errors in the shield machine soil bin pressure sensor and grouting pressure sensor, which brings unnecessary risks to equipment safety and construction excavation safety. Therefore, it is necessary to design a pressure sensor validation detection device to solve the above problems. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a pressure sensor verification detection device, which can solve the problem of high difficulty in troubleshooting and error confirmation of shield machine soil bin sensors and grouting pressure sensors during existing shield construction, and is beneficial to extending the sensor life and calculating the actual pressure value of the detected pressure surface.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a pressure sensor effectiveness testing device, including a gas pressure reducing valve, one side of the ball valve is connected to the external gas source through the gas pressure reducing valve; the other side of the ball valve is connected to a gas pressurization sealing device with a cylindrical structure; the other side of the gas pressurization sealing device is connected to a high-precision gas pressure gauge, and a pressure sensor to be tested is arranged on the top inner wall of the gas pressurization sealing device.

[0005] Furthermore, the high-precision gas pressure gauge has a measurement accuracy of 0.05 bar and a measuring range of 10 bar.

[0006] Furthermore, the gas pressure reducing valve is an adjustable gas pressure reducing valve, which has a built-in pressure gauge with a measuring accuracy of 0.2 bar, and the gas pressure can be adjusted arbitrarily between 0-6 bar.

[0007] Preferably, the top inner wall of the gas pressurized sealing device is fixedly connected with a sealing gasket by a pressure plate screw to contact and cooperate with the pressure sensor.

[0008] Preferably, the pressure sensor is communicatively connected to a collector, the collector is connected to a USB converter via a wire, and the converter is connected to a computer.

[0009] Furthermore, multiple pressure sensors can be set up, and the collector can collect data from multiple analog pressure sensors at the same time, with a data collection error of about 1‰; the pressure sensor realizes data communication with the collector through wireless or wired means. When a wired connection is adopted, a wire hole is opened at the bottom of the gas pressurization sealing device for wire output, and a sealing ring is set at the wire hole for sealing.

[0010] Furthermore, the computer displays the sensor pressure detection value in real time, and the display value of the precision gas pressure gauge is read synchronously and compared with the computer reading to determine the quality of the sensor and the size of the error.

[0011] Furthermore, the bottom of the gas pressurized sealing device is an openable threaded sealing structure, which is convenient for taking out and putting in the pressure sensor.

[0012] The utility model has the following technical effects:

[0013] The simple pressure sensor validation detection device provided by the utility model can not only be split on the shield machine equipment platform to quickly detect the sensor error and quality, but also can quickly detect the quality and error value of the newly purchased sensor at any position through the hub and converter. It has the characteristics of simple processing, low cost, strong applicability, easy operation, good stability, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0015] Figure 1 It is a side view of the utility model;

[0016] Figure 2 It is a top view of the utility model;

[0017] Figure 3 This is the principle diagram of the detection device system of the utility model;

[0018] Explanation of the numbers in the figure: gas pressure reducing valve 1, ball valve 2, gas pressurization sealing device 3, high-precision gas pressure gauge 4, pressure sensor 5, sealing gasket 6, collector 7, converter 8, computer 9. DETAILED DESCRIPTION

[0019] like Figures 1 to 3As shown, a pressure sensor verification and detection device includes a gas pressure reducing valve 1, one side of a ball valve 2 is connected to an external gas source through the gas pressure reducing valve 1; the other side of the ball valve 2 is connected to a gas pressurization sealing device 3 of a cylindrical structure; the other side of the gas pressurization sealing device 3 is connected to a high-precision gas pressure gauge 4, and a pressure sensor 5 to be detected is arranged on the top inner wall of the gas pressurization sealing device 3.

[0020] Furthermore, the high-precision gas pressure gauge 4 has a measurement accuracy of 0.05 bar and a measuring range of 10 bar.

[0021] Furthermore, the gas pressure reducing valve 1 is an adjustable gas pressure reducing valve, which has a built-in pressure gauge with a measurement accuracy of 0.2 bar, and the gas pressure can be adjusted arbitrarily between 0-6 bar.

[0022] Preferably, a sealing gasket 6 is fixedly connected to the inner wall of the top of the gas pressurization sealing device 3 by a pressure plate screw to contact and cooperate with the pressure sensor 5.

[0023] Preferably, the pressure sensor 5 is communicatively connected to the collector 7 , the collector 7 is connected to a USB converter 8 via a wire, and the converter 8 is connected to a computer 9 .

[0024] Furthermore, multiple pressure sensors 5 can be set, and the collector 7 can collect data from multiple analog pressure sensors 5 at the same time, and the data collection error is about 1‰; the pressure sensor 5 realizes data communication with the collector 7 through wireless or wired means. When a wired connection is adopted, a wire hole is opened at the bottom of the gas pressurization sealing device 3 for wire output, and a sealing ring is set at the wire hole for sealing.

[0025] Furthermore, the computer 9 displays the sensor pressure detection value in real time, and the display value of the precision gas pressure gauge is read synchronously and compared with the reading of the computer 9 to determine the quality of the sensor and the size of the error.

[0026] The working principle of the utility model is:

[0027] Place the pressure sensor 5 to be tested in the gas pressurized sealing device 3, compact and seal it; give the external pressure gas source pressure through the air pipe and the gas pressure reducing valve 1, and close the ball valve 2 when the pressure is stable; connect the pressure sensor 5 to be tested, the collector 7, the converter 8 and the computer 9 through the wire and the communication line; read the pressure reading of the high-precision gas pressure gauge 4, and read the pressure reading of the pressure sensor 5 detected and displayed at the computer 9; give different detection pressure values, repeat the above detection actions, record and compare the data, and determine whether the pressure sensor 5 is good or bad, and understand the error value of the sensor pressure display. This provides technical guidance for equipment maintenance and shield advancement construction.

[0028] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A pressure sensor validation detection device, characterized in that: The invention comprises a gas pressure reducing valve (1), one side of a ball valve (2) is connected to an external gas source through the gas pressure reducing valve (1); the other side of the ball valve (2) is connected to a gas pressurizing sealing device (3) of a cylindrical structure; the other side of the gas pressurizing sealing device (3) is connected to a high-precision gas pressure gauge (4), and a pressure sensor (5) to be detected is arranged on the inner wall of the top of the gas pressurizing sealing device (3).

2. A pressure sensor validation detection device according to claim 1, characterized in that: The top inner wall of the gas pressurizing sealing device (3) is fixedly connected with a sealing gasket (6) by a pressure plate screw and is in contact with the pressure sensor (5).

3. A pressure sensor validation detection device according to claim 2, characterized in that: The pressure sensor (5) is communicatively connected to the collector (7), the collector (7) is connected to a 485 to USB converter (8) via a wire, and the converter (8) is connected to a computer.

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