Online verification and calibration device for pressure detection equipment

Abstract

The utility model discloses an on-line verification and calibration device of pressure detection equipment, which comprises a mounting seat communicated with a material conveying pipeline, a pressure detection pipeline communicated with the conveying pipeline is formed in the mounting seat, and a first valve is mounted at the end, communicated with the mounting seat, of the pressure detection pipeline. A pressure detection device is mounted at the other end of the pressure detection pipeline; the pressure detection pipeline is communicated with a pressure relief pipeline and a calibration pipeline; a pressure relief valve is installed on the pressure relief pipeline, and a second valve is installed at the communicating end of the calibration pipeline and the pressure detection pipeline. According to the utility model, on-line identification and calibration can be realized, and the second valve is arranged, so that calibration errors caused by pollution of calibration equipment due to pollution of the calibration pipeline by oil stains and the like can be effectively prevented.

Description

Technical Field

[0001] The utility model belongs to the field of instrument detection, and in particular relates to an online verification and calibration device for pressure detection equipment. Background Art

[0002] Many materials, such as natural gas and gasoline, need to be transported via pipelines. To ensure the safety of pipeline transportation and to promptly detect leaks in the pipelines, pressure gauges, pressure transmitters, and other equipment are usually installed on the pipelines for pressure testing. However, to ensure the accuracy of the instrument, the pressure testing equipment needs to be tested and calibrated every once in a while. Currently, many units use a testing method that involves removing the pressure testing equipment to be calibrated and replacing it with a calibrated pressure testing equipment. The pressure testing equipment to be calibrated is then sent to the testing room for calibration, and then replaced again for the next round of calibration. However, since the specifications and sizes of the pressure testing equipment at each installation location may vary, this method is not only cumbersome and requires recording the position of each replaced pressure testing device, but also causes wear and tear on the installation location with each disassembly and assembly of the pressure gauge, resulting in a gradual deterioration in the sealing of the installation location and leakage. Summary of the Invention

[0003] In order to solve the above problems, the utility model discloses an online verification and calibration device for pressure detection equipment.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] An online verification and calibration device for pressure detection equipment includes a mounting base connected to a material conveying pipeline, a pressure detection pipeline connected to the conveying pipeline formed in the mounting base, a first valve installed at the end of the pressure detection pipeline connected to the mounting base, and a pressure detection device installed at the other end of the pressure detection pipeline; the pressure detection pipeline is connected to a pressure relief pipeline and a calibration pipeline; a pressure relief valve is installed on the pressure relief pipeline, and a second valve is installed at the connecting end of the calibration pipeline and the pressure detection pipeline.

[0006] As a further improvement, the external threaded connection of the calibration pipeline is provided with a dust cover.

[0007] As a further improvement, the calibration pipeline is located above the pressure relief pipeline.

[0008] As a further improvement, the pressure detection device is a pressure gauge or a pressure transmitter.

[0009] The advantages of this utility model are as follows:

[0010] 1. The second valve is provided to effectively prevent the calibration pipeline from being contaminated by oil and other pollutants, which in turn may cause calibration errors due to contamination of the calibration equipment.

[0011] 2. The special clamping structure not only ensures the stability of the connection during the detection process, but also facilitates quick installation and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of Example 1 with the dust cover installed after the test is completed.

[0013] Figure 2 Schematic diagram of the cover structure.

[0014] Figure 3 This is a structural diagram of the online verification and calibration of the pressure detection equipment in Example 2. DETAILED DESCRIPTION Example

[0015] like Figure 1 An online verification and calibration device for pressure detection equipment, comprising a material conveying pipeline 1, a mounting seat 2, a pressure detection pipeline 3, a first valve 4, a pressure detection device 5, a pressure relief pipeline 6, a calibration pipeline 7, a pressure relief valve 8, and a second valve 9.

[0016] The pressure detection line 3 is vertically arranged within the mounting base 2. A pressure detection device 5, such as a pressure gauge or pressure transmitter, is mounted on the top, and a first valve 4 is installed at the bottom. The pressure detection line 3 is connected to a pressure relief line 6 at the bottom and to a calibration line 7 at the top. A pressure relief valve 8 is installed on the pressure relief line 6, and a second valve 9 is installed on the calibration line 7.

[0017] Normally, the first valve 4 is open, the pressure relief valve 8 and the second valve 9 are closed, and the pressure detection device 5 detects the pressure in the material conveying pipeline 1 in real time. When pressure calibration is required, close the first valve 4, open the pressure relief valve 8 to release the high-pressure material (such as oil and gas) in the pressure detection pipeline 3, and then close the pressure relief valve 8 after cleaning it. Open the second valve 9, and then connect the pressure calibrator to the calibration pipeline 7 to calibrate the pressure detection device 5. After calibration, close the second valve 9, open the first valve 4, and then cover the outer end of the calibration pipeline 7 with a dust cover 11. Figure 1 shown. Example

[0018] On the basis of Example 1, in order to overcome the problem that the existing pressure calibrator rotates too many times through the detection nut connection, causing the hose spiral to narrow its internal air path and thus affecting the accuracy of calibration, the following improvement is made: a female quick-clamping structure is formed at the end of the calibration pipeline, the female quick-clamping structure is connected to a male quick-clamping structure, the male quick-clamping structure is connected to a hose 10, and the hose is connected to the pressure calibrator. Very specific

[0019] The pressure calibrator's hose is bonded to a rigid tube 101, with L-shaped clamping joints 102 formed on both sides of the middle of the rigid tube 101. A cover plate 71 is fixed to the outer end of the calibration pipeline 7. The inside of the cover plate 71 is formed with a connecting cavity 72 with a diameter larger than the inner diameter of the calibration pipeline 7. A socket 73 corresponding to the rigid tube 101 is formed in the middle of the cover plate 71, and avoidance holes 74 corresponding to the clamping joint 102 are formed on the left and right sides of the socket 73. A clamping groove 77 that cooperates with the clamping joint 102 is formed on the upper and lower sides of the cover plate 71. The bottom of the connecting cavity 72 is connected to an annular sealing sheet 76 via an elastic structure 75.

[0020] When using it, the rigid tube 101 is inserted into the insertion hole 73, and the clamping joint 102 is inserted into the avoidance hole 74, and then the annular sealing piece 76 is pressed downward. Then the rigid tube 101 is rotated 90 degrees, and the annular sealing piece 76 rebounds under the elastic force of the elastic structure 75, and the clamping joint 102 is clamped into the clamping groove 77 to complete the fixation. Figure 3 As shown. At this point, the pressure calibrator is inflated and calibrated. Due to the obstruction of the clamping joint 102, the rigid tube 101 will not be pushed out by the air pressure, ensuring the stability of the connection. After the test is completed, press down, rotate 90 degrees, and pull out.

[0021] It should be noted that the end of the rigid tube 101 needs to pass through the connecting cavity 72 and be inserted into the calibration pipeline 7 to ensure airtightness. To further ensure airtightness, the outer periphery of the end of the rigid tube 101 can be covered with elastic sealing materials such as rubber.

[0022] The pressure detection device 5 is a pressure gauge or a pressure transmitter.

[0023] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and the embodiments. They can be fully applied to various fields suitable for the present invention. For those familiar with this field, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. An online verification and calibration device for pressure detection equipment, characterized in that: The invention comprises a mounting seat (2) connected to a material conveying pipeline (1), a pressure detection pipeline (3) connected to the conveying pipeline (1) is formed in the mounting seat (2), a first valve (4) is installed at the end of the pressure detection pipeline (3) connected to the mounting seat (2), and a pressure detection device (5) is installed at the other end of the pressure detection pipeline (3); the pressure detection pipeline (3) is connected to a pressure relief pipeline (6) and a calibration pipeline (7); a pressure relief valve (8) is installed on the pressure relief pipeline (6), and a second valve (9) is installed at the end connecting the calibration pipeline (7) and the pressure detection pipeline (3).

2. The online verification and calibration device for pressure detection equipment according to claim 1, characterized in that: The calibration pipeline (7) is externally threadedly connected to a dust cover (11).

3. The online verification and calibration device for pressure detection equipment according to claim 1, characterized in that: The calibration pipeline (7) is located above the pressure relief pipeline (6).

4. The on-line verification and calibration device for pressure detection equipment according to any one of claims 1 to 3, characterized in that: The pressure detection device (5) is a pressure gauge or a pressure transmitter.

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