Today, I will introduce a national invention authorized patent-high temperature remote pressure differential pressure transmitter. The patent was applied for by Chongqing Nanxiaojun Technology Co., Ltd., and the authorization was announced on October 20, 2017.
Content descriptionThe utility model relates to a high temperature remote pressure differential pressure transmitter, which is suitable for corrosion resistance, high temperature resistance, and measurement of high temperature medium at minus 45 DEG C to 300 DEG C, and is widely used in the fields of chemical industry, electric power, metallurgy, pharmacy and the like.
Background of the inventionAt present, it is known that the transmitters that measure pressure at home or abroad are composed of measuring diaphragm, connecting flange, capillary tube, pressure differential pressure transmitter body, high temperature filling liquid and other components. When traditional transmitters measure high-temperature media, the high-boiling point filling fluid has poor fluidity due to its high boiling point and poor fluidity in the high-temperature medium environment, which affects the capillary transmission speed, resulting in slow pressure value display, and low-boiling point filling fluid in a high-temperature environment. It is prone to vaporization and expansion, causing the diaphragm to be damaged and difficult to repair; the traditional remote pressure and differential pressure transmitter is transmitted to the pressure and differential pressure transmitter body through the capillary tube filled with silicon oil to achieve pressure measurement. In traditional transmitters, the capillary tube generally cannot exceed 15 meters, and due to environmental temperature changes, in addition to the volatilization and blockage of the pressure tube, once the capillary tube leaks oil, the entire transmitter measurement will not be possible. Therefore, the traditional The transmitter is difficult to measure in a high-temperature medium environment, and the transmission distance is limited, and maintenance is extremely inconvenient.
Therefore, those skilled in the art devote themselves to developing a high temperature remote pressure differential pressure transmitter that can improve the response time of the high temperature remote pressure differential pressure transmitter and can be used in high temperature medium measurement at the same time, and is easy to maintain.
Summary of the inventionIn view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a high-temperature remote-transmission pressure differential pressure transmitter that improves the response time and can be used in high-temperature medium measurement, and is easy to maintain. Remote pressure differential pressure transmitter.
In order to achieve the above purpose, the present invention provides a high temperature remote pressure differential pressure transmitter, which includes a high temperature filling area, a high temperature sensing area, a signal transmission device, and a remote pressure differential pressure transmitter body. The sensing area includes a circuit signal conversion device and a fixed connection device; the signal transmission device is a high-temperature communication cable.
![[New patent introduction] High temperature remote pressure differential pressure transmitter](http://i.bosscdn.com/blog/o4/YB/AF/tvl2KAL_lSAACVlTD3sPM760.png)
The circuit signal conversion device includes a high temperature sensor and an amplifying circuit. The strain resistance and the amplifying circuit in the high temperature sensor constitute a Wheatstone bridge; the fixed connection device includes a high temperature sensor connector, a high temperature sensor fixed part, and an amplifying circuit connector , High temperature cable joints.
A high temperature sensor is installed in the high temperature sensor connecting piece and fixed by a high temperature sensor fixing piece; an amplifier circuit is installed in the amplifier circuit connection, and a high temperature cable connector is welded on the outside of the amplifier circuit connecting piece, and the high temperature sensor connecting piece The connecting piece and the amplifying circuit are assembled together by screwing.
The high-temperature filling area includes a measuring diaphragm laser welded on the outside of the connecting flange, a heat sink is welded on the inner side of the connecting flange, and a capillary whose one end is welded to the measuring diaphragm is wrapped in the heat sink, and the other end of the heat sink is It is welded and connected to the outside of the high temperature sensor connector, and the other end of the capillary is connected with the strain diaphragm in the high temperature sensor. The connecting flange is provided with a high temperature filling hole, and the high temperature filling liquid is filled after being vacuumed through the high temperature filling hole to seal; One end of the high-temperature communication cable is inserted into the high-temperature cable connector and connected to the amplifier circuit, and the other end is connected to the pressure differential pressure transmitter body through the M12 aviation plug-in. The high temperature sensor uses a sapphire core; the high temperature filling fluid uses a super high temperature filling fluid.
The beneficial effect of the utility model is: the invention converts the pressure to be measured into an electric signal through the high temperature sensor, and then transmits the electric signal to the pressure differential pressure transmitter body through the high temperature communication cable, so as to realize the transmission and measurement of the pressure of the high temperature medium. The transmission mode of the electric signal greatly improves the response time of the high-temperature remote pressure differential pressure transmitter. At the same time, the utility model can also work in a high-temperature environment, and the replacement of each working area is convenient, which is very convenient for the maintenance of the device.
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