CN219511596U

CN219511596U - Differential pressure type orifice plate steam flowmeter capable of eliminating measured value deviation

Info

Publication number: CN219511596U
Application number: CN202320509030.XU
Authority: CN
Inventors: 张彩绍; 唐毅虎; 李雪琼; 周驰; 李本文; 李明勇; 刘伟; 沈昆
Original assignee: Chuxiong Dianzhong Nonferrous Metal Co ltd
Current assignee: Chuxiong Dianzhong Nonferrous Metal Co ltd
Priority date: 2023-03-16
Filing date: 2023-03-16
Publication date: 2023-08-11
Anticipated expiration: 2033-03-16

Abstract

The utility model relates to a differential pressure type orifice plate steam flowmeter capable of eliminating measured value deviation, and belongs to the technical field of differential pressure type orifice plate flowmeters. The utility model comprises a pore plate steam flowmeter, a low-end pressure guiding pipe, a high-end pressure guiding pipe, a differential pressure transmitter, needle valves, a water storage barrel, an automatic drainage valve and a communicating pipe, wherein the low-end pressure guiding pipe and the high-end pressure guiding pipe are communicated with the pore plate steam flowmeter; the utility model adopts the automatic drain valve and the water storage barrel to automatically drain the condensed water in the pressure guiding pipe, thereby avoiding the accumulated water in the pressure guiding pipe, improving the accuracy of metering data, and the device can automatically drain water without consuming a great deal of manpower, and has good social and economic benefits.

Description

Differential pressure type orifice plate steam flowmeter capable of eliminating measured value deviation

Technical Field

The utility model belongs to the technical field of differential pressure type orifice plate flowmeters, and particularly relates to a differential pressure type orifice plate steam flowmeter capable of eliminating measured value deviation.

Background

The differential pressure orifice flowmeter is a high-range ratio differential pressure flow device formed by matching a standard orifice plate with a multi-parameter differential pressure transmitter, can measure the flow of gas, steam, liquid and lead, and is widely applied to process control and measurement in the fields of petroleum, chemical industry, metallurgy, electric power, heat supply, water supply and the like. The working principle of the differential pressure type orifice plate flowmeter is that the differential pressure type orifice plate flowmeter generates pressure drop before and after the throttling element, namely the pressure difference is larger, the flow rate of medium flow is larger, the pressure difference generated before and after the throttling element is larger, and the orifice plate flowmeter can measure the flow rate of the fluid by measuring the pressure difference. However, the temperature can be reduced during operation, a large amount of condensed water can be generated in the pressure guiding pipe, so that the error of the measured pressure difference is increased, and if the accuracy of the steam flow data is ensured by adopting a manual drainage mode, the labor intensity of staff can be increased, and larger manpower is consumed. Therefore, there is a need for a differential pressure orifice steam flow meter that eliminates the measurement bias.

Disclosure of Invention

In order to overcome the problems in the background art, the utility model provides a differential pressure type orifice plate steam flowmeter capable of eliminating measured value deviation.

In order to achieve the above purpose, the utility model is realized by the following technical scheme:

the utility model provides a differential pressure type orifice plate steam flowmeter capable of eliminating measured value deviation, which comprises an orifice plate steam flowmeter, a low-end pressure guiding pipe, a high-end pressure guiding pipe, a differential pressure transmitter, needle valves, a water storage barrel, an automatic drainage valve and a communicating pipe, wherein the orifice plate steam flowmeter is communicated with the low-end pressure guiding pipe and the high-end pressure guiding pipe, the lower ends of the low-end pressure guiding pipe and the high-end pressure guiding pipe are respectively provided with the water storage barrel, the automatic drainage valve is respectively arranged at the positions of water outlets of the two water storage barrels, the upper ends of the low-end pressure guiding pipe and the high-end pressure guiding pipe are respectively provided with the two needle valves, and the upper edges of the low-end pressure guiding pipe and the high-end pressure guiding pipe are respectively connected with the differential pressure transmitter through the communicating pipe.

Preferably, needle valves are arranged on the two communicating pipes.

The utility model has the beneficial effects that:

the utility model adopts the automatic drain valve and the water storage barrel to automatically drain the condensed water in the pressure guiding pipe, thereby avoiding the accumulated water in the pressure guiding pipe, reducing the influence on the measurement result of the differential pressure transmitter and improving the accuracy of the metering data. The device can automatically drain water without consuming a great deal of manpower, and has good social and economic benefits.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

In the figure, a 1-steam pipe, a 2-pore plate steam flowmeter, a 3-low end pressure guiding pipe, a 4-high end pressure guiding pipe, a 5-differential pressure transmitter, a 6-needle valve, a 7-water storage barrel, an 8-automatic drain valve and a 9-communicating pipe are arranged.

Detailed Description

In order to make the objects, technical solutions and advantageous effects of the present utility model more apparent, preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate understanding of the skilled person.

As shown in FIG. 1, a differential pressure type orifice plate steam flowmeter capable of eliminating measured value deviation comprises an orifice plate steam flowmeter 2, a low-end pressure guiding pipe 3, a high-end pressure guiding pipe 4, a differential pressure transmitter 5, needle valves 6, a water storage barrel 7, an automatic drain valve 8 and a communicating pipe 9, wherein the low-end pressure guiding pipe 3 and the high-end pressure guiding pipe 4 are communicated with the orifice plate steam flowmeter 2, the water storage barrel 7 is arranged at the lower ends of the low-end pressure guiding pipe 3 and the high-end pressure guiding pipe 4, the automatic drain valve 8 is arranged at the water outlet position of the two water storage barrels 7, the automatic drain valve 8 is a drain valve which works by utilizing the physical principle, the drain valve is opened by the buoyancy of a buoy in the drain valve, when the liquid level in the water storage barrel 7 rises, the buoy rises, the valve is automatically opened, the upper ends of the low-end pressure guiding pipe 3 and the high-end pressure guiding pipe 4 are respectively provided with the two needle valves 6, and the upper ends of the low-end pressure guiding pipe 3 and the high-end pressure guiding pipe 4 are respectively connected with the differential pressure transmitter 5 through the communicating pipe 9, the upper needle valves 6 and the lower needle valves 6 are respectively arranged at the positions, and the upper needle valves 6 are respectively more accurately, and the upper needle valves 6 are used for measuring and the two needle valves 6 are arranged at the position of the same.

The working process of the utility model comprises the following steps: steam is generated in the steam pipe 1, and the steam passes through the orifice plate steam flowmeter 2 to generate a pressure difference, and is introduced into a sensor of the differential pressure transmitter 9 through the pressure guiding pipe, so that a pressure difference result is measured. However, due to the fact that the temperature is reduced, the pressure guiding pipe generates a large amount of condensed water, when the liquid level of the condensed water in the water storage barrel 7 rises to a certain height, the automatic drain valve 8 is opened to drain the condensed water, when the condensed water is drained, the automatic drain valve 8 is closed after the liquid level is reduced, the circulation is achieved, accumulated water in the pressure guiding pipe is avoided, the measuring error of the differential pressure transmitter is reduced, and therefore the accuracy of measurement of the steam flowmeter is guaranteed.

Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the utility model, and that, although the utility model has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the utility model as defined by the appended claims.

Claims

1. A differential pressure type orifice plate steam flowmeter capable of eliminating measured value deviation is characterized in that: a differential pressure type orifice plate steam flowmeter that can eliminate measured value deviation include orifice plate steam flowmeter (2), low side draws pressure pipe (3), high side draws pressure pipe (4), differential pressure transmitter (5), needle valve (6), water storage bucket (7), automatic drain valve (8), communicating pipe (9), the intercommunication has low side to draw pressure pipe (3) and high side to draw pressure pipe (4) on orifice plate steam flowmeter (2), the lower extreme that low side draws pressure pipe (3) and high side to draw pressure pipe (4) all is provided with water storage bucket (7), automatic drain valve (8) are all installed along delivery port position to two water storage buckets (7), the upper end that low side draws pressure pipe (3) and high side to draw pressure pipe (4) all is provided with two needle valves (6), and the pipeline that follows between two needle valves (6) on low side draws pressure pipe (3) and high side draws pressure pipe (4) all is connected with differential pressure transmitter (5) through installation (9).

2. A differential pressure orifice plate vapor flow meter capable of eliminating measured value bias as defined in claim 1, wherein: needle valves (6) are arranged on the two communicating pipes (9).