CN211401315U - Differential pressure flow sensor for backrest pipe - Google Patents

Abstract

The utility model belongs to the field of flow sensors, and discloses a backrest pipe differential pressure flow sensor, which comprises a welded pipe, one side of the welded pipe is connected with a positive pressure lead-out pipe and a negative pressure lead-out pipe, and the beneficial effects are: the device is welded with two pipes of the same diameter It is the full pressure end facing the air flow, and the static pressure end facing the air flow, and the coefficient number and the static pressure connector mark number are marked at the joint. When using, the connection should not be wrong. The side pointing rod is in the same direction as the probe. It is not necessary to distinguish the two interfaces of the backrest tube, but it should be noted that the windward interface is connected to the "+" pressure interface of the differential pressure gauge, and the other interface is connected to the differential pressure The "-" pressure port of the meter is connected to the pressure interface of the meter. This device is complementary to the thermal gas mass flowmeter in application. Especially for the measurement of humidity, high temperature, high pressure and other places, this device can not only measure the total pressure, static pressure, Dynamic pressure (ie differential pressure), velocity and flow can also be calculated.

Description

A backrest tube differential pressure flow sensor

technical field

The utility model relates to a backrest tube differential pressure flow sensor, which belongs to the technical field of flow sensors.

Background technique

In reality, the measurement of gas containing moisture, dust and coal tar is very difficult, the sensor is quickly blocked, and frequent cleaning brings a lot of inconvenience to production management. As a result, it is not suitable for wet gas, coke oven gas, and gas that is easy to hang, and the current flow sensor cannot meet the needs of use.

Utility model content

The purpose of the utility model is to overcome the defects of the prior art and provide a backrest pipe differential pressure flow sensor, which solves the problem of difficulty in measuring the gas containing moisture, dust and coal tar.

In order to solve the above-mentioned technical problems, the utility model provides the following technical solutions:

The utility model relates to a backrest pipe differential pressure flow sensor, comprising a welded pipe, one side of the welded pipe is connected with a positive pressure lead-out pipe and a negative pressure lead-out pipe, the welded pipe is provided with a flange type cut-off ball valve, and one side of the welded pipe is provided with There is a casing, the end of the casing that is far away from the welded pipe is connected with a positive pressure pipe and a negative pressure pipe, and an installation pipe is fixedly connected to the outside of the welded pipe and the end of the casing that is far away from each other, and the installation pipes are far away from each other. Both ends are provided with an installation mechanism, and the installation mechanism is composed of two flanges and a number of bolts. A baffle plate is fixedly connected between the positive pressure outlet pipe and the negative pressure outlet pipe, and the positive pressure outlet pipe and A guide plate is fixedly connected to the side of the negative pressure lead-out pipe away from the baffle plate, and the guide plate is fixedly connected to the inner wall of the installation pipe.

Preferably, the positive pressure outlet pipe and the negative pressure outlet pipe have the same diameter as the positive pressure outlet pipe and the negative pressure outlet pipe respectively, and the diameter of the positive pressure outlet pipe and the negative pressure outlet pipe is Φ3.

Preferably, the positive pressure pipe and the negative pressure pipe communicate with each other with the casing.

Preferably, both the positive pressure outlet pipe and the negative pressure outlet pipe are communicated with the welded pipe.

Preferably, the welded pipe and the sleeve are fixedly connected and communicated with each other through a flange seat.

The beneficial effects achieved by the utility model are as follows: the device is formed by welding two pipes of the same diameter, the full pressure end facing the air flow and the static pressure end facing away from the air flow, and the coefficient number and the static pressure joint are marked at the joint. The marking number should not be wrongly connected during use. The side pointing rod is in the same direction as the probe. The direction can be determined during use to ensure that the probe is aligned with the direction of the incoming flow. The interface is connected with the "+" pressure interface of the differential pressure gauge, and the other interface is connected with the "-" pressure interface of the differential pressure gauge. For measurement in other places, the device can not only measure the total pressure, static pressure, dynamic pressure (ie differential pressure) in the pipeline, but also calculate the flow rate and flow rate. The connection is simpler and more convenient, and the design of the baffle and the guide plate can assist the gas and other fluids to be detected to enter the positive pressure outlet pipe and the negative pressure outlet pipe.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation to the present invention.

In the attached image:

Figure 1 is a schematic structural diagram of the present invention.

In the picture: 1. Positive pressure outlet pipe; 2. Negative pressure outlet pipe; 3. Flanged cut-off ball valve; 4. Flange seat; 5. Casing; 6. Positive pressure pipe; 7. Negative pressure pipe; 8. Welded pipe; 9. Installation pipe; 10. Installation mechanism; 11. Baffle plate; 12. Guide plate.

Detailed ways

The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present utility model, but not to limit the present utility model.

Example 1

As shown in FIG. 1, a backrest tube differential pressure flow sensor includes a welded pipe 8. One side of the welded pipe 8 is connected with a positive pressure outlet pipe 1 and a negative pressure outlet pipe 2. Both the positive pressure outlet pipe 1 and the negative pressure outlet pipe 2 are connected to The welded pipes 8 are connected to each other, and the welded pipe 8 is provided with a flanged cut-off ball valve 3, which is convenient to control the internal communication state of the welded pipe 8. One side of the welded pipe 8 is connected with the sleeve 5 through the flange seat 4, and the end of the sleeve 5 away from the welded pipe 8 is connected. There are a positive pressure pipe 6 and a negative pressure pipe 7, the welded pipe 8 and the outer end of the sleeve 5 that are far away from each other are fixedly connected with an installation pipe 9, and the two ends of the installation pipe 9 that are far away from each other are provided with an installation mechanism 10, and the installation mechanism 10 Both are composed of two flanges and several bolts. During installation, only the flanges far away from the device are welded to the pipeline to be tested, and then the installation pipe 9 can be fixedly connected to the pipeline to be tested through bolts. This design, It can make the connection between the device and the pipeline more simple and convenient. A baffle plate 11 is fixedly connected between the positive pressure lead-out pipe 1 and the negative pressure lead-out pipe 2. The design of the guide plate 12, the baffle plate 11 and the guide plate 12 are fixedly connected to the sides, which can assist the gas and other fluids to be detected to enter the positive pressure outlet pipe and the negative pressure outlet pipe 2. The guide plate 12 is connected to the installation pipe 9. The inner wall is fixedly connected, the positive pressure pipe 6 and the negative pressure pipe 7 and the casing 5 are communicated with each other, the positive pressure lead-out pipe 1 and the negative pressure lead-out pipe 2 have the same diameter and are respectively the same as the diameter of the positive pressure pipe 6 and the negative pressure pipe 7 In the same way, this device is welded with two pipes of the same diameter. It is the full pressure end facing the airflow, and the static pressure end facing away from the airflow. The joints are marked with the coefficient number and the static pressure joint mark number, and they cannot be connected wrongly when using. , the side pointing rod is in the same direction as the probe, and the direction can be determined during use to ensure that the probe is aligned with the direction of the incoming flow. "The pressure port is connected to the positive pressure outlet pipe 1, and the other interface is connected to the "-" pressure port of the differential pressure gauge, that is, it is connected to the negative pressure outlet pipe 2. This device is complementary to the thermal gas mass flowmeter in application. Especially for the measurement of humidity, high temperature, high pressure and other places, this device can not only measure the total pressure, static pressure, dynamic pressure (ie pressure difference) in the pipeline, but also calculate the flow rate and flow, positive pressure outlet pipe 1 and negative pressure. The diameter of the lead-out pipe 2 is Φ3.

Specifically, when the utility model is used, the device is welded with two pipes of the same diameter, the full pressure end facing the air flow and the static pressure end facing away from the air flow, and the coefficient number and the static pressure joint mark are marked at the joint. The direction of the side pointing rod is the same as that of the probe, and the direction can be determined during use to ensure that the probe is aligned with the direction of the incoming flow. It is connected to the "+" pressure port of the differential pressure gauge, that is, it is connected to the positive pressure outlet pipe 1, and the other interface is connected to the "-" pressure port of the differential pressure gauge, that is, it is connected to the negative pressure outlet pipe 2. This device can not only measure the total pressure, static pressure, dynamic pressure (ie pressure difference) in the pipeline, but also calculate the flow rate and flow rate, in the When using, it is necessary to correctly select the section of the measuring point to ensure that the measuring point is in a straight pipe section with smooth airflow. For this reason, the local components such as elbows and variable-diameter special-shaped pipes in the direction of the measurement section away from the incoming flow should be larger than 4 times the diameter of the pipeline, and the local elbows and variable-diameter structures in the downstream direction should be larger than 2 times the diameter of the pipeline. The pressure hole is aligned with the direction of the air flow, and is indicated by a pointing rod. The insertion hole of the measuring point should avoid air leakage, which can prevent the air flow interference on this section. The backrest tube can only measure the flow velocity at a certain point on the pipe section. Due to the uneven flow distribution of the section, more points should be measured on the section to obtain the average value. Test the smoothness before use, and the positive pressure outlet pipe 1 And the small static pressure holes on the negative pressure lead-out pipe 2 are often checked to prevent impurities from blocking the small holes. Clean the inner and outer pipes in time after use to ensure a long-term good state. By setting the installation pipe 9 and the installation mechanism 10, during installation, only The flange plate away from the device needs to be welded to the pipeline to be tested, and the installation pipe 9 can be fixedly connected to the pipeline to be tested by bolts. This design can make the connection between the device and the pipeline more simple and convenient. The baffle 11 and the guide The design of the plate 12 can assist the gas and other fluids to be detected to enter the positive pressure outlet pipe and the negative pressure outlet pipe 2 .

Finally, it should be noted that the above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. , it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (5)

1. The utility model provides a backrest tube differential pressure flow sensor, its characterized in that, includes welded tube (8), welded tube (8) one side is connected with malleation fairlead (1) and negative pressure fairlead (2), be provided with flange formula on welded tube (8) and cut off ball valve (3), welded tube (8) one side is provided with sleeve pipe (5), the one end of keeping away from welded tube (8) on sleeve pipe (5) is connected with malleation pipe (6) and negative pressure pipe (7), the equal fixedly connected with installation pipe (9) in the one end outside of keeping away from each other on welded tube (8) and sleeve pipe (5), the both ends of keeping away from each other on installation pipe (9) all are provided with installation mechanism (10), installation mechanism (10) comprise by two ring flanges and a plurality of bolts, fixedly connected with baffle (11) between malleation fairlead (1) and the negative pressure fairlead (2), the negative pressure guiding pipe is characterized in that a guide plate (12) is fixedly connected to one side of the positive pressure guiding pipe (1) and one side of the negative pressure guiding pipe (2) far away from the baffle (11), and the guide plate (12) is fixedly connected with the inner wall of the installation pipe (9).

2. The back tube differential pressure flow sensor of claim 1, wherein: the positive pressure eduction tube (1) and the negative pressure eduction tube (2) have the same calibers and are respectively the same as the calibers of the positive pressure tube (6) and the negative pressure tube (7), and the calibers of the positive pressure eduction tube (1) and the negative pressure eduction tube (2) are phi 3.

3. The back tube differential pressure flow sensor of claim 1, wherein: the positive pressure pipe (6) and the negative pressure pipe (7) are communicated with the sleeve (5).

4. The back tube differential pressure flow sensor of claim 1, wherein: the positive pressure eduction tube (1) and the negative pressure eduction tube (2) are communicated with the welding tube (8).

5. The back tube differential pressure flow sensor of claim 1, wherein: the welding pipe (8) and the sleeve (5) are fixedly connected and communicated with each other through the flange seat (4).

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