CN111121989A

CN111121989A - Fluid detection device

Info

Publication number: CN111121989A
Application number: CN201911231041.0A
Authority: CN
Inventors: 宋有强; 杨坤; 樊海彬; 张�诚; 张茹; 如志鹏; 许敬德; 曲继坤; 夏玲; 郑庆伟
Original assignee: HEFEI GENERAL ENVIRONMENT CONTROL TECHNOLOGY CO LTD; Hefei General Machinery Research Institute Co Ltd
Current assignee: HEFEI GENERAL ENVIRONMENT CONTROL TECHNOLOGY CO LTD; Hefei General Machinery Research Institute Co Ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-05-08

Abstract

The invention relates to the technical field of chemical fluid detection, in particular to a fluid detection device which comprises a sleeve and a sensor, wherein the sleeve and the sensor are inserted into a pipeline to be detected, the sensor is arranged in a slot formed in the sleeve, the cross section of the sleeve along the flowing direction of fluid in the pipeline to be detected is in a water droplet shape, the end, away from a fluid source, of the cross section is a water droplet tip, and the round end of the water droplet shape is opposite to the fluid to be detected. The invention has the advantages that: according to the invention, the sleeve is arranged on the outer side of the sensor, so that the sensor is not directly contacted with the liquid to be detected, the sensor can be protected, and the section of the sleeve is made into a water drop shape, so that when the fluid to be detected flows through the sleeve, the wake region behind the sleeve is greatly reduced, violent vortex is not generated, the vibration of the sleeve is reduced, the testing precision is improved, the service life of the sleeve is prolonged, and the potential safety hazards of sleeve breakage and medium leakage are solved.

Description

Fluid detection device

Technical Field

The invention relates to the technical field of chemical fluid detection, in particular to a fluid detection device.

Background

When the temperature sensor is used for measuring fluid parameters in the industries of chemical engineering, refrigeration and the like, such as temperature measurement, when the measured fluid has the characteristics of high pressure, corrosivity, toxicity and the like, the sensor cannot be in direct contact with the measured fluid, and a temperature sensor sleeve is required. The commonly used temperature sensor sleeve at present is a round blind pipe type. When the measured fluid flows through the circular casing, separation occurs at the rear of the casing and a wake is formed, which is filled with irregular vortices, as shown in fig. 1. The strong motion of swirl causes the sleeve pipe vibration, and especially when the medium pipe diameter is great, the sleeve pipe is longer, the vibration is more violent, influences temperature test accuracy, and long-term the use can make the sleeve pipe fracture cause the medium to reveal, brings serious incident.

Disclosure of Invention

In order to solve the problems that in the prior art, the casing pipe vibrates after eddy current exists behind the casing pipe, measurement precision is affected, and medium leakage is caused by casing pipe fracture after long-term use, the invention provides a fluid detection device.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a fluid detection device, is including inserting sleeve pipe, the sensor of waiting to detect in the pipeline, and the sensor setting is in the slot of seting up on the sleeve pipe, and the sleeve pipe is the water droplet shape along waiting to detect the ascending cross-section of fluid flow direction in the pipeline, and the one end that the fluid source was kept away from in cross-section is water droplet point portion, and the round end of water droplet shape is just to being detected the fluid.

Preferably, the angle between the vector direction of the sleeve from the inner end to the outer end of the pipe to be tested and the vector direction of the fluid movement is not more than 90 degrees.

Preferably, the length direction of the slot is consistent with the length direction of the sleeve.

Preferably, the pipeline to be detected is provided with a mounting hole through which the sleeve passes, a sealing element is arranged at the rear edge of the sleeve inserted into the mounting hole, and the slot opening of the sleeve is positioned outside the pipeline to be detected.

Preferably, a conductive medium is arranged in the slot.

Preferably, the bottom of the slot is provided with a concave part matched with the bottom of the sensor.

Preferably, the sensor is a thermometer.

The invention has the advantages that:

(1) according to the invention, the sleeve is arranged on the outer side of the sensor, so that the sensor is not directly contacted with the liquid to be detected, the sensor can be protected, and the section of the sleeve is made into a water drop shape, so that when the fluid to be detected flows through the sleeve, the wake region behind the sleeve is greatly reduced, violent vortex is not generated, the vibration of the sleeve is reduced, the testing precision is improved, the service life of the sleeve is prolonged, and the potential safety hazards of sleeve breakage and medium leakage are solved.

(2) The angle between the vector direction of the sleeve from the inner end part to the outer end part of the pipeline to be detected and the vector direction of the fluid motion is not more than 90 degrees, so that the bottom of the sleeve is more fully contacted with the fluid, and better measurement is realized.

(3) The length direction of the slot is consistent with that of the sleeve, so that the requirement on the size of the sleeve is reduced, and the smaller the size of the sleeve is, the smaller the orbiting motion in the pipeline to be measured is.

(4) The slot opening is arranged outside the pipeline to be detected, so that the sensor can be replaced conveniently, for example, different types of sensors can be replaced, and the sensors with different precisions can be replaced under the same type of state.

(5) The effect of the conducting medium is used for detecting the parameters of the substances in the pipeline to be detected by the corresponding sensor, so that the influence of the sleeve on the detection result is reduced.

(6) The concave part arranged at the bottom of the slot can play a role of positioning the sensor, and as the conducting medium is also arranged in the slot, the volume of the slot is larger than that of the sensor, and the concave part can ensure that the detection end of the sensor is at the optimal position.

(7) The sensor may be a thermometer for detecting temperature, or may be used for other sensors that do not require direct contact.

Drawings

FIG. 1 is a schematic structural diagram of a fluid testing apparatus of the present invention vertically disposed in a pipe to be tested.

Fig. 2 is a cross-sectional view of the cannula and sensor during fluid detection.

FIG. 3 is a schematic structural diagram of the fluid detection device of the present invention obliquely disposed in a pipe to be detected.

The notations in the figures have the following meanings:

1-pipeline 2 to be detected-sleeve 3-slot 31-recess 4-sensor

Detailed Description

As shown in fig. 1-2, a fluid detection device comprises a sleeve 2 inserted into a pipeline 1 to be detected and a sensor 4, wherein the sensor 4 is arranged in a slot 3 formed in the sleeve 2, the cross section of the sleeve 2 along the flowing direction of fluid in the pipeline 1 to be detected is in a water drop shape, the end of the cross section far away from a fluid source is a water drop tip, and the round end of the water drop shape is opposite to the fluid to be detected. A conductive medium is arranged in the slot 3. In this embodiment, the sensor 4 is a thermometer. Through setting up sleeve pipe 2 in the outside at sensor 4, sensor 4 is direct not with wait to detect liquid direct contact like this, can play the effect of protection sensor 4 like this, and the drop shape is made to sleeve pipe 2's cross-section, when being surveyed the fluid and flowing through sleeve pipe 2 like this, the wake district behind sleeve pipe 2 reduces greatly, can not produce violent swirl, the vibration of sleeve pipe 2 has been reduced, the life of measuring accuracy and sleeve pipe 2 has been improved, the fracture of sleeve pipe 2 has been solved, the potential safety hazard of medium leakage.

The angle between the vector direction of the sleeve 2 from the inner end to the outer end of the pipe 1 to be detected and the vector direction of the fluid movement is not more than 90 degrees. In fig. 1, the sleeve 2 is vertically inserted into the pipeline 1 to be detected, and the length direction of the slot 3 is consistent with the length direction of the sleeve 2. In fig. 3, the sleeve 2 is inserted obliquely into the test tube 1 to be tested.

The pipeline 1 to be detected is provided with a mounting hole through which the sleeve 2 penetrates, a sealing element is arranged at the edge of the sleeve 2 after the sleeve 2 is inserted into the mounting hole, and the slot 3 of the sleeve 2 is positioned outside the pipeline 1 to be detected. In this embodiment, the seal is realized by welding the fixed seal.

The bottom of the slot 3 is provided with a concave part 31 which is matched with the bottom of the sensor 4.

The invention is not to be considered as limited to the specific embodiments shown and described, but is to be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a fluid detection device, its characterized in that is including inserting sleeve pipe (2), sensor (4) in waiting to detect pipeline (1), and sensor (4) set up slot (3) of seting up on sleeve pipe (2), and sleeve pipe (2) are the water droplet shape along waiting to detect the ascending cross-section of pipeline (1) internal fluid flow direction, and the one end that the fluid source was kept away from in cross-section is water droplet point portion, and the round end of water droplet shape is just to being surveyed the fluid.

2. A fluid testing device according to claim 1, characterized in that the angle of the vectorial direction of the casing (2) from the inner end to the outer end of the pipe (1) to be tested to the vectorial direction of the fluid movement is not more than 90 degrees.

3. A fluid testing device according to claim 2, wherein the length direction of the socket (3) coincides with the length direction of the sleeve (2).

4. The fluid detection device according to claim 1, wherein a mounting hole through which the sleeve (2) passes is formed in the pipeline (1) to be detected, a sealing member is arranged at the rear edge of the sleeve (2) inserted into the mounting hole, and the slot (3) of the sleeve (2) is positioned outside the pipeline (1) to be detected.

5. A fluid testing device according to claim 2, wherein the slot (3) is provided with a conductive medium.

6. A fluid testing device according to claim 5, wherein the bottom of the socket (3) is provided with a recess (31) which fits the bottom of the sensor (4).

7. A fluid testing device according to claim 1, wherein the sensor (4) is a thermometer.