CN220982502U

CN220982502U - Pipeline detection equipment normal position calibrating device

Info

Publication number: CN220982502U
Application number: CN202322514686.3U
Authority: CN
Inventors: 钟一峰; 朱晨彬; 牛亚琳; 罗佳骏
Priority date: 2023-09-15
Filing date: 2023-09-15
Publication date: 2024-05-17
Anticipated expiration: 2033-09-15

Abstract

The invention belongs to the field of pipeline testing equipment calibration, and discloses an in-situ calibration device of pipeline testing equipment, wherein a pipeline connecting piece is connected in series between a medium output port of the pipeline testing equipment to be calibrated and a medium input port of a test piece, a standard pressure sensor and a standard temperature sensor are used for measuring the pressure and the temperature in the pipeline connecting piece on line, the actual measurement values of the pressure and the actual measurement values of the temperature output by the two sensors are collected at the same time according to a set sampling period, and the two actual measurement values are corrected into a standard pressure value and a standard temperature value for calibrating the pipeline testing equipment; the correction includes: carrying out dynamic temperature correction on the temperature measured value, and carrying out temperature compensation correction on the pressure measured value; the dynamic temperature correction algorithm is based on a transfer function deduced by an energy balance equation, and a correction coefficient is introduced; the pressure temperature compensation method is based on the experimentally obtained deviation relationship between the temperature in the connecting pipe and the temperature in the heat-radiating pressure-conducting device and the pressure measurement; the performance of the pipeline testing equipment in the actual working state can be truly represented, and the calibration precision can be improved.

Description

Pipeline detection equipment normal position calibrating device

Technical Field

The utility model belongs to the field of pipeline detection equipment calibration, and particularly relates to an in-situ calibration device of pipeline detection equipment.

Background

Hydraulic/pneumatic circuits are widely used in core power systems in aircraft, automotive, etc., and are known as "power nerves". The insufficient pressure resistance and high-low temperature alternating resistance of the hydraulic/pneumatic system can cause leakage, fatigue damage and even explosion of the hydraulic conduit assembly, and serious safety accidents can be caused, so that the reliability of the detection results of the performances such as pressure resistance, explosion resistance, pulse resistance, high-low temperature alternating resistance and the like is directly related to the safety of equipment operation.

The method is still in the starting stage in the field of hydraulic/pneumatic system pressure and temperature tests in China, and is relatively weak from test method research and test equipment research to tracing of related parameters. Although pipeline pressure and temperature tests are widely applied in other industries in recent years, the metering traceability of a common pressure-resistant explosion testing machine, a pulse testing machine and a high-low temperature alternating testing machine still does not have a practical and effective method and equipment.

For the calibration of pipeline detection equipment, the industry mainly adopts the steps of detaching pressure and temperature sensors and meters, calibrating the pressure and temperature sensors on site or sending the pressure and temperature sensors to a laboratory, calibrating the temperature sensors by referring to JJG229-2010, JJF 1637-2017 or ASTM E220, calibrating the pressure transmitters by referring to JG875 or JJG882, and calibrating the pressure transmitters by referring to JJF1101 for testing the external temperature; the frequent disassembly process of the sensor seriously affects the service life of equipment and is easy to cause safety problems such as pipeline leakage and the like. Some manufacturers can reserve the calibration port, but the calibration port is usually far away from the working condition environment, and the single parameter calibration can not take into account the mutual influence of multiple parameters, and the pressure sensor and the temperature sensor can not be calibrated alone, so that the actual performance of the pipeline detection device can not be represented truly.

Disclosure of utility model

Aiming at the defects of the prior art, the utility model provides an in-situ calibration device for pipeline detection equipment, which integrates pressure detection and temperature detection equipment, and is also provided with an expansion connecting piece, so that in-situ calibration and temperature and pressure compound calibration of the pipeline detection equipment can be realized, and the device is high in calibration precision, strong in applicability and portable.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the in-situ calibration device of the pipeline detection equipment is characterized by comprising a detection device, a collector and a data processor; the detection device comprises a pipeline connecting piece, a standard pressure sensor and a standard temperature sensor; the pipeline connecting piece comprises a detection pipe and a first U-shaped bracket, wherein the installation central axis of the detection pipe and the central axis of a medium output pipe of the pipeline detection equipment to be calibrated are arranged on the same horizontal plane; the two ends of the detection tube are respectively provided with a flange piece connected with a medium output tube orifice of the detection device of the pipeline to be calibrated and a medium input port of the test piece in series, the flange piece comprises an upstream tube, a downstream tube and a connecting tube which are sequentially and fixedly connected, the cross section sizes of the upstream tube and the connecting tube are the same as those of the medium output tube of the detection device of the pipeline to be calibrated, and the diameter of the downstream tube is 60-80 mm; the standard pressure sensor is arranged on a pressure guide pipe communicated with the upstream pipe, and a measuring contact of the standard pressure sensor is positioned in the pressure guide pipe; the surface of the pressure guide pipe is provided with a radiator; the standard temperature sensor is arranged on the downstream pipe, and a measuring contact of the standard temperature sensor extends into the downstream pipe and is close to the central axis of the downstream pipe; the collector is respectively and electrically connected with the standard pressure sensor and the standard temperature sensor, and the data processor is electrically connected with the collector.

Preferably, the standard temperature sensor is a Pt100 platinum resistor with a diameter of 1mm, which measures an armoured protective housing with a diameter of about 4mm over the contact.

Further preferably, the measuring contact of the standard temperature sensor is coated with a protective sleeve.

Preferably, the standard pressure sensor is not parallel to the mounting central axis of the standard temperature sensor.

Preferably, the first U-shaped bracket comprises a base, two groups of lower clamping blocks and an upper clamping block; the base is a hollowed-out flat plate, and the two lower clamping blocks are fixed on the base; the surface of the lower clamping block, which is connected with the upper clamping block, is provided with a semicircular groove which is matched with each other.

Further preferably, the first U-shaped bracket is made of an aluminum alloy material.

Preferably, the detection device further comprises an expansion connector, wherein the expansion connector is arranged at the upstream of the pipeline connector and is used for connecting other sensors except temperature and pressure; the expansion connecting piece comprises an extension tube and a second U-shaped bracket; the length of the extension pipe is greater than 300mm, the cross section size of the extension pipe is the same as that of a medium output pipe of the pipeline detection equipment to be calibrated, and the installation central axis of the extension pipe is in the same horizontal plane with that of the medium output pipe of the pipeline detection equipment to be calibrated.

Preferably, the detection tube is made of stainless steel material.

Preferably, the maximum size of all parts of the detection device is less than 400mm.

Preferably, the collector is electrically connected with the standard pressure sensor and the standard temperature sensor through quick plugs; the data processor and the collector are packaged in a first portable box body, and a power interface is arranged on the first portable box body.

Compared with the prior art, the utility model has the beneficial effects that:

1. The standard temperature sensor and the standard pressure sensor are integrated on the detection device, and the detection device is connected in series between the medium output pipe orifice of the pipeline detection equipment to be calibrated and the medium input port of the test piece, so that the in-situ calibration of the disassembly-free sensor is realized, the temperature and pressure compound calibration capable of representing the whole actual working performance of the pipeline detection equipment to be calibrated is also realized, the data detection point is closer to the actual output of the pipeline detection equipment, and the calibration precision is high.

2. According to the detection device, the radiator is arranged on the surface of the pressure guide pipe for taking pressure, so that the difficulty in selecting the standard pressure sensor and the maintenance cost of the calibration equipment are reduced.

3. The standard temperature sensor provided by the utility model has the advantages that the installation position of the measuring contact is close to the central axis of the downstream pipe, and the temperature detection precision is improved.

4. The standard temperature sensor selects Pt100 platinum resistor with short response time, and designs and measures the contact protection sleeve for the standard temperature sensor, thereby being safe and reliable.

5. The collector and the data processor are packaged in the first portable box, the detection device adopts a detachable portable design, and the detection device can be packaged in the second portable box, is convenient to carry and install and is suitable for on-site calibration.

Drawings

FIG. 1 is a schematic view of a pipeline inspection device according to an embodiment of the present utility model;

FIG. 2 is a perspective view of a piping connection piece according to an embodiment of the present utility model;

FIG. 3 is a top view of a piping connection piece according to an embodiment of the present utility model;

FIG. 4 is a right side view of a pipe connection according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram of a standard temperature sensor according to an embodiment of the present utility model;

FIG. 6 is an exploded view of a standard temperature sensor mounting structure according to an embodiment of the present utility model;

FIG. 7 is a block diagram of a standard temperature sensor installation in accordance with an embodiment of the present utility model;

fig. 8 is a diagram of an expansion joint according to an embodiment of the present utility model.

In the figure: 11. the device comprises a first U-shaped bracket, 111, a base, 112, a lower clamping block, 113, an upper clamping block, 114, a threaded fastener, 12, an upstream pipe, 121, a pressure guiding pipe, 13, a downstream pipe, 131, a temperature measuring hole, 14, a connecting pipe, 15, a first flange piece, 16, a second flange piece, 21, an armoured protective shell, 22, a standard temperature sensor measuring contact, 23, a connecting box, 24, a lead wire opening, 25, a threaded connecting piece, 26, a protective sleeve, 31, an extension pipe, 32, a third flange piece, 33, a fourth flange piece, 34, a second U-shaped bracket, alpha, an angle between the pressure guiding pipe and a central axis of the temperature measuring hole.

Detailed Description

In order that the manner in which the above-recited features, advantages, objects and advantages of the present utility model are attained and can be understood in detail, a more particular description of the utility model, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings.

It should be noted that, in the description of the present utility model, the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are directions or positional relationships based on the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model; the terms "first," "second," "third," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "coupled," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally coupled, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. When two elements are "fixedly connected" or "pivotally connected," the two elements may be directly connected or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The fixed connection or the fixed connection mode can be screw connection or welding or riveting or plugging connection or connection through a third component. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The structure of a common set of pipeline detection equipment is shown in fig. 1 (oil medium is taken as an example in the drawing), the pipeline detection equipment is controlled by pressure transmission equipment (pulse signal source and servo controller) to output dynamic hydraulic pressure or air pressure to a tested hydraulic pressure or air pressure pipeline (test piece), and the tested hydraulic pressure or air pressure pipeline (test piece) is arranged on an equidistributed integrated block; a temperature sensor of the pipeline detection device for detecting the medium temperature of the input test piece is arranged in a source medium tank (hydraulic oil source), and a pressure sensor for detecting the medium pressure of the input test piece is arranged behind the supercharger; output signals of the temperature sensor and the pressure sensor are collected and analyzed by a data collection system and are used for representing the output of the pipeline detection equipment. The structure shows that the actual working condition positions of the detection sensor and the test piece are not the same, and the temperature and the pressure values of the actual working condition are different from those of the detection position due to factors such as the diversion of a pipeline, wherein the temperature sensor is the internal temperature of a source medium tank, and after the temperature of the external environment of a pipeline changes when the water pump circulates for a long distance, the measured value of the temperature sensor cannot reflect the medium temperature of a medium output port of the pipeline detection device; the pressure sensor monitoring position of the pipeline detection device is a pipeline outlet or pipeline inlet position which is arranged near the supercharger, the position and a pipeline detection device medium output port are not in the same horizontal plane, and the factors such as opening control of various valves and bending of the pipeline can generate certain pressure loss. Furthermore, the temperature sensor and the pressure sensor are mounted at different locations of the pipe inspection device being inspected, without taking into account the effect of temperature on the pressure measurement results. For the above two reasons, in the prior art, the temperature sensor and the pressure sensor of the pipeline detection device to be calibrated are detached to calibrate respectively, so that the performance of the device can be affected due to the detachment, and the integral actual working performance of the pipeline detection device to be calibrated can not be represented.

The in-situ calibration device of the pipeline detection equipment comprises a detection device, a collector and a data processor.

The detection device comprises a pipeline connecting piece, a standard pressure sensor and a standard temperature sensor. The installation position of the detection device is selected at a medium (liquid or gas) output port of the pipeline detection equipment to be calibrated, and the detection pipe on the pipeline connector is directly connected with the medium input port of the test piece, namely, the medium output pipe orifice of the pipeline detection equipment to be calibrated, the detection pipe on the pipeline connector and the medium input port of the test piece are sequentially connected in series. The cross section size of the detecting tube provided with the pipeline connecting piece is the same as that of the medium output tube of the pipeline detecting device to be calibrated, and the two tubes are positioned on the same horizontal plane (the pressure of the two tubes is kept the same) through structures such as a bracket and the like. And installing a standard temperature sensor and a standard pressure sensor on the detection tube, enabling the measurement contact to be in contact with a medium in the detection tube, and collecting the actual temperature and pressure in the pipeline at the working condition position.

As shown in fig. 2, 3 and 4, the pipe connection member includes a sensing pipe and a first U-shaped bracket 11 fixedly supporting the sensing pipe.

The detection tube comprises an upstream tube 12, a downstream tube 13 and a connecting tube 14 which are coaxially and sequentially fixedly connected; the diameters of the upstream pipe 12 and the connecting pipe 14 are the same as the cross section size of an output pipe (generally DN 32) of the pipeline detection device to be calibrated; the pressure guide pipe 121 is arranged on the outer cylindrical surface of the upstream pipe 12, the pressure guide pipe 121 is communicated with the interior of the upstream pipe 12, and a connecting piece 122 is arranged on the pressure guide pipe and is used for detachably and fixedly connecting a standard pressure sensor; a temperature measuring hole 131 is formed in the outer cylindrical surface of the downstream pipe 13 and used for installing a standard temperature sensor; the diameter of the downstream pipe 13 (generally DN 65) is set to be 60-80 mm so as to ensure that the insertion depth of the standard temperature sensor in the pipeline medium is more than 30mm, and the measuring contact of the standard temperature sensor is close to the central axis of the downstream pipe 13 so as to ensure the measuring precision. Preferably, the pressure guide tube 121 is not parallel to the central axis of the temperature measuring hole 131, so that the installation central lines of the two standard sensors are at a certain angle to facilitate the installation and the disassembly of the sensors, and the two central axes are arranged at an acute angle alpha as shown in fig. 4.

The first U-shaped bracket 11 is used for ensuring that the central axes of the upstream pipe 12 and the downstream pipe 13 are on the same horizontal plane with the central axes of the output pipe and the test piece pipe of the calibrated pipe detection equipment; preferably, the first U-shaped bracket 11 includes a base 111, two sets of lower clamping blocks 112 and upper clamping blocks 113 with semicircular grooves, and the lower clamping blocks 112 are fixed on the base 111. When the detection tube is fixed, after two ends of the detection tube (the left end of the upstream tube 12 and the right end of the connecting tube 14) are supported in the semicircular grooves of the two lower clamping blocks 112, the upper clamping blocks 113 and the lower clamping blocks 112 are fixed face to face through threaded fasteners 114, so that the semicircular grooves on the two clamping blocks are connected, and the fixation of the detection tube is realized.

The two ends of the detection pipe are fixedly connected with a first flange piece 15 and a second flange piece 16 respectively, and the first flange piece and the second flange piece are used for connecting an output pipe of the calibrated pipeline detection equipment and an input port of a test piece pipeline respectively.

In order to prolong the service life of the pipeline connecting piece, the detection pipe, the first flange piece 15 and the second flange piece 16 are preferably made of stainless steel materials with good pressure resistance and corrosion resistance; in order to make the device lightweight, the first U-shaped bracket 11 is made of an aluminum alloy material, and the base 111 thereof is hollowed out.

Standard pressure sensors and standard temperature sensors are selected based on the pipe test range (temperature, pressure, etc.), the test conditions (impact conditions, etc.), and the type of media (oil, water, and other liquids or gases).

1. Standard pressure sensor

Under the high temperature condition, the medium temperature of the test piece has an important influence on the pressure measurement result in the pipeline, so that the service life of the standard pressure sensor is reduced, and the selection standard (such as temperature resistance limit) of the standard pressure sensor is improved. In order to improve the accuracy of pressure measurement and reduce the manufacturing and maintenance cost of a calibration device, the utility model is provided with a radiator on the surface of the pressure guide pipe 121, the temperature of a medium entering the pressure guide pipe 121 from a detection pipe is reduced, so that the temperature of the medium contacting with a measuring contact of a standard pressure sensor is reduced to be within the standard temperature range of the sensor, and when the temperature range of the medium in a test piece pipeline is (-70-160) DEG C, the standard pressure sensor with the standard temperature range of (-40-60) DEG C is selected.

2. Standard temperature sensor

In the related standard, the peak range, the rising rate and the like of the pulse test waveform of the hydraulic/pneumatic pipe fitting are clearly defined, so that the calibration of the dynamic temperature measurement precision (usually step signals) of the pipeline detection equipment is one of the key problems to be solved by the calibration device. In order to improve the measurement accuracy of the dynamic temperature signal, a temperature sensor with a smaller time constant is required to measure the temperature so as to obtain better response time dynamic characteristics, so that the diameter of the temperature measuring end of the temperature sensor is expected to be thinner and better. However, high-pressure pulsating fluid often exists in actual working conditions, and mechanical strength of the ultra-thin sensor cannot be ensured in pulsating liquid. It is therefore necessary to balance the response time with the mechanical strength of the sensor when designing the sensor structure.

Typically, to ensure a fast response time, a Pt100 platinum resistor with a diameter of 1mm is selected as a standard temperature sensor, and to ensure mechanical strength, an armoured protective housing 21 with a diameter of about 4mm is wrapped around a position of about 10mm from the sensor measuring contact 22, as shown in fig. 5. For the condition that the flow speed of the working medium is fast or the flow speed change is severe, in order to ensure that the sensor measuring contact is not damaged, the sensor measuring contact 22 needs to be coated with the protective sleeve 26 by the threaded connector 25, and then a standard sensor coated with the protective sleeve 26 is inserted into the temperature measuring hole 131 on the downstream pipe 13; the protective sleeve 26 is typically provided with a diameter of about 4mm; as shown in fig. 6 and 7.

In order to improve the applicability of the in-situ calibration device of the pipeline detection equipment, the detection device also comprises an expansion connecting piece, and the expansion connecting piece is mainly used for connecting a flowmeter or other sensors. As shown in fig. 8, the expansion connector comprises an extension tube 31 with the length of more than 300mm and the diameter the same as that of a medium output tube of the pipeline detection device to be calibrated, and a third flange member 32 and a fourth flange member 33 are respectively fixedly arranged at two ends of the extension tube; the two ends of the extension tube 31 are supported and fixed by adopting a second U-shaped bracket 34, so that the central axis of the extension tube 31 and the central axis of an output tube of the calibrated pipeline detection device are positioned at the same horizontal plane; preferably, the second U-shaped bracket 34 is identical in construction to the first U-shaped bracket 11. When the expansion connecting piece and the pipeline connecting piece are used simultaneously, the expansion connecting piece is arranged at the upstream of the pipeline connecting piece, so that the influence of various components in the pipeline connecting piece on parameters measured by the expansion connecting piece is avoided.

The collector is electrically connected with a standard pressure sensor and a standard temperature sensor in the detection device and is used for collecting the output of the two sensors; the data processor is electrically connected with the collector and is used for inputting calibration experimental conditions and parameters, analyzing, correcting and displaying calibration results.

The utility model relates to an in-situ calibration device of pipeline detection equipment, which is mainly suitable for in-situ calibration, and is characterized in that quick plugs are arranged at lead ports of a collector and two standard sensors, the collector and a data processor are packaged in a first portable box body, a power interface is arranged on the first portable box body, and a 220V power supply is externally connected for working; meanwhile, the pipeline connecting piece and the expansion connecting piece adopt a detachable and portable design (as described above), the maximum size of all parts on the pipeline connecting piece and the expansion connecting piece is not more than 400mm (the maximum size of two standard sensors is not more than 400 mm), and the pipeline connecting piece and the expansion connecting piece can be packaged in a second portable box after being detached; the first portable box body and the second portable box body can be independent or integrated into a whole.

Claims

1. The in-situ calibration device of the pipeline detection equipment is characterized by comprising a detection device, a collector and a data processor; wherein,

The detection device comprises a pipeline connecting piece, a standard pressure sensor and a standard temperature sensor;

The pipeline connecting piece comprises a detection pipe and a first U-shaped bracket (11) which enables the installation central axis of the detection pipe and the central axis of a medium output pipe of the pipeline detection equipment to be calibrated to be on the same horizontal plane; the two ends of the detection tube are respectively provided with flange pieces (15, 16) connected with a medium output tube orifice of the detection device of the calibrated tube and a medium input port of the test piece in series, the detection tube comprises an upstream tube (12), a downstream tube (13) and a connecting tube (14) which are sequentially and fixedly connected, the cross section sizes of the upstream tube (12) and the connecting tube (14) are the same as those of the medium output tube of the detection device of the calibrated tube, and the diameter of the downstream tube (13) is 60-80 mm;

The standard pressure sensor is arranged on a pressure guide pipe (121) communicated with the upstream pipe (12), and a measuring contact of the standard pressure sensor is positioned in the pressure guide pipe (121); a radiator is arranged on the surface of the pressure guide pipe (121);

The standard temperature sensor is arranged on the downstream pipe (13), and a measuring contact of the standard temperature sensor extends into the downstream pipe (13) and is close to the central axis of the downstream pipe (13);

The collector is respectively and electrically connected with the standard pressure sensor and the standard temperature sensor, and the data processor is electrically connected with the collector.

2. An in-situ calibration apparatus for a pipeline inspection device according to claim 1, wherein the standard temperature sensor is a Pt100 platinum resistor with a diameter of 1mm, and an armoured protective shell (21) with a diameter of about 4mm is covered over the measuring contact (22).

3. An in-situ calibration apparatus for a pipeline inspection device as claimed in claim 2 wherein the measurement contacts (22) of the standard temperature sensor are covered with protective sleeves (26).

4. A pipeline inspection apparatus in-situ calibration device as recited in claim 1, wherein the standard pressure sensor is non-parallel to the mounting center axis of the standard temperature sensor.

5. An in-situ calibration apparatus for a pipeline inspection device according to claim 1, wherein the first U-shaped bracket (11) comprises a base (111), two sets of lower clamping blocks (112) and an upper clamping block (113); the base (111) is a hollowed-out flat plate, and the two lower clamping blocks (112) are fixed on the base (111); a matched semicircular groove is formed in one surface, connected with the upper clamping block (113), of the lower clamping block (112).

6. A pipeline inspection device in-situ calibration apparatus as claimed in claim 5 wherein said first U-shaped bracket (11) is fabricated from an aluminium alloy material.

7. A pipeline inspection apparatus in-situ calibration device according to claim 1, wherein the inspection apparatus further comprises an expansion connector mounted upstream of the pipeline connector for connection to other sensors than temperature and pressure; the expansion connector comprises an extension tube (31) and a second U-shaped bracket (34); the length of the extension pipe (31) is larger than 300mm, the cross section size of the extension pipe is the same as that of a medium output pipe of the pipeline detection equipment to be calibrated, and the installation central axis of the extension pipe is in the same horizontal plane with that of the medium output pipe of the pipeline detection equipment to be calibrated.

8. A pipeline inspection apparatus in-situ calibration device as claimed in claim 1 wherein the inspection tube is fabricated from a stainless steel material.

9. An in situ calibration apparatus for a pipeline inspection device as claimed in claim 1 wherein all parts of the inspection device have a maximum dimension of less than 400mm.

10. The in-situ calibration device of pipeline inspection equipment according to claim 1, wherein the collector is electrically connected with the standard pressure sensor and the standard temperature sensor through quick plugs; the data processor and the collector are packaged in a first portable box body, and a power interface is arranged on the first portable box body.