CN209342180U - A kind of Pi Tuoba flowmeter - Google Patents

Abstract

The utility model relates to a Pitoba flowmeter, comprising a pressure taking head, a pitot tube and an induction head, the pitot tube is connected with the pressure taking head and the induction head, the pressure taking head includes a static pressure hole and a full pressure hole, the Pitot tube includes a static pressure tube and a full pressure tube, and the multiple induction heads include a static pressure joint and a full pressure joint, and the static pressure tube connects the static pressure hole and the static pressure joint, and the full pressure tube Connect the full-pressure hole and the full-pressure joint, and a cooling channel is arranged around the static pressure tube and the full-pressure tube, circulating cooling water circulates in the cooling channel, and the cooling channel is connected with a micro motor and cooling water. The cooling water circulates in the cooling channel under the action of the micro motor; temperature sensors are installed in the total pressure pipe and the static pressure pipe, and the temperature sensors are connected to the micro motor. The flowmeter is suitable for high temperature measurement of fluids.

Description

A Pitoba Flowmeter

technical field

The present invention relates to a flowmeter, in particular to a Pitoba flowmeter.

Background technique

The Pitoba flowmeter is a double-layer hollow compound frame bent at right angles, with multiple pressure-taking holes, which can measure the total pressure and static pressure of the fluid at the same time. It is used together with differential pressure transmission and flow indicator. It is widely used in the production process of petrochemical, metallurgy, power plant, electric power, textile and other industries to measure the flow of gas, liquid, steam, water, air volume and other fluids.

There is a small hole called the total pressure hole in the upstream direction of the pitot tube head, where a "stagnation point" is formed, and there are several static pressure holes perpendicular to the fluid flow direction at a certain distance from the head. The static pressure measured by each static pressure hole is output after equalizing the pressure in the pressure equalization chamber. Since the difference between the total pressure of the fluid and the static pressure has a certain numerical relationship with the flow rate of the measured fluid, it can be calculated by measuring the fluid flow rate with a Pitot tube. The size of the measured flow.

Pitot tube has the advantages of small pressure loss, low price, small size, easy to carry, install and measure, etc. It is suitable for flow measurement of medium and large diameter pipelines, as well as fluid velocity and velocity distribution at any point in air ducts, water pipes and mines Measurement.

The measurement environment of the existing pitot tube flowmeter has certain requirements on the temperature, and the measurement results will be affected if the temperature is higher than a certain temperature, which will lead to inaccurate measurement.

Contents of the invention

In order to solve the problem that the measurement temperature of the existing pitot tube flowmeter is limited and the measurement result is inaccurate due to the high temperature, the invention provides a pitot tube flowmeter, which can be adapted to the high temperature measurement of the fluid.

The technical solution adopted by the present invention is: a Pitoba flowmeter, including a pressure taking head, a Pitot tube and an induction head, the Pitot tube is connected to the pressure taking head and the induction head, and the pressure taking head includes A static pressure hole and a total pressure hole, the Pitot tube includes a static pressure tube and a full pressure tube, and multiple induction heads include a static pressure joint and a full pressure joint, and the static pressure tube connects the static pressure hole and the static pressure joint, The full-pressure tube is connected to the full-pressure hole and the full-pressure joint, and a cooling channel is arranged around the periphery of the static pressure tube and the full-pressure tube. Circulating cooling water circulates in the cooling channel, and the cooling channel is connected to a micro motor. and cooling water, the cooling water circulates in the cooling channel under the action of the micro motor; a temperature sensor is arranged in the full pressure pipe and the static pressure pipe, and the temperature sensor is connected to the micro motor , a first pressure sensor and a second pressure sensor are respectively provided in the static pressure joint and the full pressure joint.

Further, the induction head is arranged on the mounting base, and the flowmeter is fixed on the pipeline to be tested through the mounting base.

Further, the axes of the total pressure tube and the static pressure tube are parallel to each other.

Further, the temperature sensor is connected with a display screen, and the display screen is used to display the temperature value sensed by the temperature sensor.

Further, the static pressure hole is arranged vertically to the fluid flow direction, and the orifice of the total pressure hole is arranged on an inclined plane.

Further, the angle between the orifice slope of the total pressure hole and the axis of the total pressure tube is 40-60°.

Further, the inner diameter of the total pressure tube is larger than the inner diameter of the static pressure tube.

The beneficial effects produced by the present invention include: the Pitoba flowmeter in the present invention is provided with a temperature control device, which can control the temperature of the fluid to be measured. When the fluid temperature is too high, the micro motor drives the cooling water to flow. The pressure tubes are equipped with temperature sensors, and the cooling channels around them are relatively independent, and are respectively connected with corresponding micro-motors. When the temperature in the full-pressure tube is too high, the water in the cooling channel outside the full-pressure tube starts to circulate and cool. When the static pressure When the temperature of the pipe and the full-pressure pipe are both too high, the water in the two cooling passages will flow; the present invention is respectively provided with a first pressure sensor and a second pressure sensor on the static pressure joint and the full-pressure joint to facilitate the monitoring of the flow As a result, pressure compensation is carried out; the full pressure hole adopts the slope method, which well protects the impact of fluid pressure on the full pressure hole and increases the service life of the Pitoba flowmeter.

Description of drawings

The structural representation of Pitoba flowmeter among Fig. 1 the present invention;

In the figure 1. Static pressure hole, 2. Total pressure hole, 3. Static pressure pipe, 4. Total pressure pipe, 5. Static pressure joint, 6. Full pressure joint, 7. Mounting seat, 8. Cooling channel, 9. Temperature Sensor.

Detailed ways

The present invention will be further explained in detail below in conjunction with the accompanying drawings and specific embodiments, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

As shown in Fig. 1, the present invention relates to a Pitobar flowmeter, comprising a pressure-taking head, a Pitot tube and an induction head, the Pitot tube is connected to the pressure-taking head and the induction head, and the pressure-taking head includes Static pressure hole 1 and full pressure hole 2, the pitot tube includes a static pressure tube 3 and a full pressure tube 4, and multiple induction heads include a static pressure joint 5 and a full pressure joint 6, and the static pressure tube 3 is connected to the static pressure tube 3. The pressure hole 1 and the static pressure joint 5, the full pressure tube 4 is connected to the full pressure hole 2 and the full pressure joint 6, and a cooling channel 8 is arranged around the periphery of the static pressure tube 3 and the full pressure tube 4, and the cooling channel 8 circulates cooling water, and the cooling channel 8 is connected with a micro motor and cooling water, and the cooling water circulates in the cooling channel 8 under the action of the micro motor; and the static pressure pipe 3 are all provided with a temperature sensor 9, the temperature sensor 9 is connected to the micro-motor through the controller, when the temperature detected by the temperature sensor 9 is higher than the applicable temperature of the flowmeter, the micro-motor is started by the controller , a first pressure sensor and a second pressure sensor are respectively provided in the static pressure joint 5 and the full pressure joint 6 .

The Pitoba flowmeter in the present invention is provided with a temperature control device, i.e. a cooling channel 8, a micro motor and a temperature sensor 9, which can control the temperature of the fluid to be measured. When the fluid temperature is too high, the micro motor drives the cooling water to flow, and the static pressure Both the tube 3 and the full pressure tube 4 are provided with a temperature sensor 9, and the peripheral cooling channels 8 are relatively independent, and are respectively connected with corresponding micro motors. When the temperature inside the full pressure tube 4 is too high, the cooling channel 8 outside the full pressure tube 4 The water in the passage 8 starts to circulate and cool, and when the temperature of the static pressure pipe 3 and the full pressure pipe 4 is too high, the water in the two cooling passages 8 all flows; A first pressure sensor and a second pressure sensor are provided to facilitate pressure compensation for flow monitoring results;

The Pitoba flowmeter in the present invention needs to be fixed on the pipeline to be tested so that the full pressure hole 2 faces the fluid, so the flowmeter is fixed on the pipeline to be tested through the mounting seat 7, and the pressure head extends into the pipeline.

The axes of the total pressure pipe 4 and the static pressure pipe 3 are parallel to each other. The temperature sensor 9 is connected with a display screen, and the display screen is used to display the temperature value sensed by the temperature sensor 9, which is convenient for observing the temperature condition in the tube.

In the present invention, the static pressure hole 1 is arranged vertically to the fluid flow direction, and the orifice of the total pressure hole 2 is arranged on an inclined plane. The angle between the inclined surface of the full pressure hole 2 and the axis of the full pressure tube 4 is 40~60°. The inclined surface of the full pressure hole 2 is used to well protect the impact of the fluid pressure on the full pressure hole 2 and increase the Pitoba flowmeter. service life. In order to ensure the accuracy of the measurement results, the inner diameter of the total pressure tube 4 in the present invention is larger than the inner diameter of the static pressure tube 3 .

The above are only preferred embodiments of the present invention, and the present invention is not limited to the content of the embodiments. For those skilled in the art, various changes and modifications can be made within the scope of the technical solution of the present invention, and any changes and modifications made are within the protection scope of the present invention.

Claims (8)

1. a kind of Pi Tuoba flowmeter, it is characterised in that: including pressure head, Pitot tube and inductive head, the Pitot tube connects institute Pressure head and the inductive head are stated, the pressure head includes static pressure hole and full pressure hole, and the Pitot tube includes static tube and total pressure Pipe, more inductive heads include static pressure inlet and total pressure connector, and the static tube connects the static pressure hole and static pressure inlet, described complete Pressure pipe connects full pressure hole and total pressure connector, is installed with cooling duct in the static tube and ram-air pipe peripheral tray, the cooling is logical Circulation has recirculated cooling water in road, and the cooling duct is connected with micromotor and cooling water, and the cooling water is described miniature In the cooling duct internal circulation flow under the action of motor；It is equipped with temperature sensor in the ram-air pipe and static tube, The temperature sensor connects the micromotor.

2. Pi Tuoba flowmeter according to claim 1, it is characterised in that: the inductive head is arranged in mounting base, institute Flowmeter is stated to be fixed in pipe under test by mounting base.

3. Pi Tuoba flowmeter according to claim 1, it is characterised in that: the axis of the ram-air pipe and the static tube It is parallel to each other.

4. Pi Tuoba flowmeter according to claim 1, it is characterised in that: the temperature sensor is connected with display screen, The display screen is for showing the temperature value that the temperature sensor senses arrive.

5. Pi Tuoba flowmeter according to claim 1, it is characterised in that: the static pressure hole vertical fluid flow direction setting, The full pressure hole aperture is arranged in inclined-plane.

6. Pi Tuoba flowmeter according to claim 5, it is characterised in that: full pressure hole aperture inclined-plane and ram-air pipe axis Wire clamp angle is 40 ~ 60 °.

7. Pi Tuoba flowmeter according to claim 1, it is characterised in that: the total pressure bore is greater than the static tube Internal diameter.

8. Pi Tuoba flowmeter according to claim 1, it is characterised in that: divide in the static pressure inlet and total pressure connector It She You not first pressure sensor and second pressure sensor.