Multifunctional joint for online testing and calibration of temperature and pressure

Abstract

The invention discloses a multifunctional joint for online testing and calibration of temperature and pressure. The multifunctional joint comprises a joint main body, a temperature sensor seat and a manual working state switching valve; at least two temperature sensor seat installation openings are formed in the end surface of the tail end of the joint main body, and the tail end of the joint mainbody is also provided with a flat square; the temperature sensor seat is installed in the temperature sensor seat installation openings, and is in threaded connection with the temperature sensor seatinstallation openings; a joint installation connecting port is arranged at the other end of the joint main body, and the joint installation connecting port is of a self-sealing conical external thread structure, and is connected with a fluid medium conveying pipeline sampling port; and a medium flow channel and an installation hole are formed inside the joint main body, the manual working state switching valve penetrates through the installation hole, and the on-off state of the medium flow channel can be switched through the manual working state switching valve. According to the technical scheme, the dual functions of the medium pressure and temperature monitoring and instrument online checking and / or calibration can be achieved at the same time, the structure is compact, the space is saved, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of joints for oil exploitation and gathering and transportation pipelines, and more specifically relates to a multifunctional joint for on-line testing and calibration of temperature and pressure. Background technique [0002] Some instruments or transmitters that simultaneously monitor the pressure and temperature of the medium need to be installed in oil production and oil gathering and transportation pipelines to realize online collection of pressure and temperature, on-site and remote monitoring, and automatic control of the production process. [0003] However, on the one hand, since most of the on-site instruments used in the oil transportation field are exposed to the open air, the working conditions are poor, and the accuracy of the instruments is easy to drop. In order to ensure that the monitoring instruments can accurately reflect the pressure and temperature of the transport medium, it is necessar...

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Problems solved by technology

[0003] However, on the one hand, since most of the on-site instruments used in the oil transportation field are exposed to the open air, the working conditions are poor, and the accuracy of the instruments is easy to drop. In order to ensure that the monitoring instruments can accurately reflect the pressure and temperature of the transport medium, it is necessary to schedule Manual inspection or calibration of corresponding instruments at intervals to ensure the accuracy of measurement results greatly increases labor intensity;

[0004] On the other hand, most of the existing pressure monitoring devices are to open pressure-taking holes on the main pipeline of the medium, install needle valves or instrument valves on the pressure-taking holes, and then install pressure gauges or pressure transmitters at the outlet of the valves to monitor the medium. For temperature, the temperature measurement probe is placed in the temperature measurement blind hole reserved on the pipeline. However, this method can only be used to observe whether the instrument is working with the naked eye during equipment inspection, and cannot determine whether the data is accurate. To determine whether the monitoring of the instrument is To be accurate, the monitoring instrument generally needs to be removed, and then reinstalled after passing the calibration on a special calibration device

For pressure gauges or pressure transmitters, in some occasions, the instrument valve can be connected with a tee, and then an instrument valve can be connected as a standard gauge interface to achieve on-site comparison and verification, but for temperature instruments, there is no convenient and feasible online comparison method

[0005] Finally, the existing calibration device cannot achieve on-site calibration, and there are many joints, which are easy to leak, occupy space, and have a high overall cost

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