CN215726424U - Pipeline temperature monitoring device - Google Patents
Pipeline temperature monitoring device Download PDFInfo
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- CN215726424U CN215726424U CN202022693625.4U CN202022693625U CN215726424U CN 215726424 U CN215726424 U CN 215726424U CN 202022693625 U CN202022693625 U CN 202022693625U CN 215726424 U CN215726424 U CN 215726424U
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Abstract
The present disclosure provides a pipeline temperature monitoring device. The pipeline temperature monitoring device includes: the fixing band is wrapped on the outer wall of the pipeline to be detected along the circumferential direction of the pipeline to be detected and is close to the welding seam of the pipeline to be detected; the thermocouples are positioned on the fixing belt and are arranged at intervals along the circumferential direction of the pipeline to be tested; and the signal processing unit is provided with a plurality of input channels which are respectively and correspondingly electrically connected with the thermocouples one by one.
Description
Technical Field
The disclosure relates to the technical field of pipeline monitoring, in particular to a pipeline temperature monitoring device.
Background
The high-pressure natural gas pipeline is mainly made of stainless steel, carbon steel, chromium molybdenum steel and the like, and two sections of pipelines need to be welded in the pipeline laying process. In the process of pipeline welding, pre-welding preheating and postwelding heat treatment belong to key links, and have great influence on welding quality. If the pre-welding preheating and post-welding heat treatment process cannot meet the specified requirements, cold cracks, delayed cracks and the like are easy to occur, and the safe operation of the pipeline is seriously influenced. Therefore, the temperature monitoring work of strengthening the pipeline welding process management and well performing the pre-welding preheating and the post-welding heat treatment is necessary.
In the related art, a plurality of temperature monitoring methods are used for the pipeline in the processes of pre-welding preheating and post-welding heat treatment, and an infrared thermometer is commonly used for monitoring the pipeline welding temperature at present. An infrared thermometer measures the surface temperature by measuring the amount of infrared energy radiated by an object.
The single detection point of the infrared thermometer is few, and only intermittent detection can be performed, so that the temperature of the whole circumference of the pipeline is difficult to monitor before and after the pipeline is welded.
Disclosure of Invention
The embodiment of the disclosure provides a pipeline temperature monitoring device, which can continuously monitor a plurality of points in the circumferential direction of a pipeline simultaneously, and ensure the accuracy and comprehensiveness of temperature monitoring of pre-welding preheating and post-welding heat treatment. The technical scheme is as follows:
the embodiment of the present disclosure provides a pipeline temperature monitoring device, the pipeline temperature monitoring device includes:
the fixing band is wrapped on the outer wall of the pipeline to be detected along the circumferential direction of the pipeline to be detected and is close to the welding seam of the pipeline to be detected;
the thermocouples are positioned on the fixing belt and are arranged at intervals along the circumferential direction of the pipeline to be tested;
and the signal processing unit is provided with a plurality of input channels which are respectively and correspondingly electrically connected with the thermocouples one by one.
In one implementation of the disclosed embodiment, the thermocouple has a probe end and a trace connected to the probe end;
the probe end of the thermocouple is fixed on one surface, facing the outer wall of the pipeline to be tested, of the fixing band, and the wiring is fixed on one surface, facing away from the outer wall of the pipeline to be tested, of the fixing band.
In one implementation of the embodiment of the present disclosure, the fixing band is a silica gel composite cloth fixing band.
In one implementation of the disclosed embodiment, the width of the fixing strap ranges from 80 mm to 120 mm.
In one implementation of the disclosed embodiment, a distance between two adjacent thermocouples among the plurality of thermocouples is in a range of 100mm to 200 mm.
In one implementation of the disclosed embodiment, the signal processing unit includes a plurality of processing sub-units corresponding to the plurality of input channels;
each processing subunit comprises an analog-to-digital converter, a filter, an amplifier and a temperature conversion circuit which are sequentially and electrically connected, and the analog-to-digital converter is also electrically connected with the input channel.
In an implementation manner of the embodiment of the present disclosure, the pipeline temperature monitoring device further includes:
and the storage unit is electrically connected with the signal processing unit.
In an implementation manner of the embodiment of the present disclosure, the pipeline temperature monitoring device further includes:
and the display unit is electrically connected with the signal processing unit.
In one implementation of the disclosed embodiment, the display unit is a liquid crystal display.
In an implementation manner of the embodiment of the present disclosure, the pipeline temperature monitoring device further includes:
and the alarm unit is electrically connected with the signal processing unit.
In one implementation of the embodiment of the present disclosure, the alarm unit is an audible and visual alarm.
The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:
the utility model provides a pipeline temperature monitoring device, through circumference parcel fixed band on the outer wall of pipeline that awaits measuring, and arrange a plurality of thermocouples at the fixed band interval, make a plurality of thermocouples can measure the temperature of the ascending multiple point in pipeline circumference that awaits measuring, then transmit the data that record respectively for signal processing unit, make signal processing unit can determine the temperature of the ascending each point in pipeline circumference that awaits measuring based on the data that a plurality of thermocouples surveyed, realize the continuous temperature monitoring to the pipeline circumference multiple point that awaits measuring, the temperature monitoring result of each data point that obtains of measurement can be used for confirming whether accord with the welding process requirement. The pipeline temperature monitoring device can ensure the accuracy and comprehensiveness of temperature monitoring of pre-welding preheating and post-welding heat treatment.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a pipeline temperature monitoring device provided in an embodiment of the present disclosure;
fig. 2 is a block diagram of a pipeline temperature monitoring device provided in an embodiment of the present disclosure;
fig. 3 is a block diagram of a signal processing unit provided by an embodiment of the present disclosure;
fig. 4 is a block diagram of a pipeline temperature monitoring device provided in an embodiment of the present disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a pipeline temperature monitoring device provided in an embodiment of the present disclosure. Referring to fig. 1, the pipe temperature monitoring apparatus includes: a fixed band 11 and a plurality of thermocouples 12. Fig. 2 is a block diagram of a pipeline temperature monitoring device provided in an embodiment of the present disclosure. Referring to fig. 2, the pipe temperature monitoring apparatus further includes: a signal processing unit 13.
The fixing belt 11 is wrapped on the outer wall of the pipeline 10 to be tested along the circumferential direction of the pipeline 10 to be tested, and the fixing belt 11 is close to the welding seam 100 of the pipeline 10 to be tested;
a plurality of thermocouples 12 are located on the fixing band 11, and the plurality of thermocouples 12 are arranged at intervals along the circumferential direction of the pipe 10 to be measured;
the signal processing unit 13 has a plurality of input channels, which are electrically connected to the plurality of thermocouples 12 in a one-to-one correspondence, respectively.
The utility model provides a pipeline temperature monitoring device, through circumference parcel fixed band on the outer wall of pipeline that awaits measuring, and arrange a plurality of thermocouples at the fixed band interval, make a plurality of thermocouples can measure the temperature of the ascending multiple point in pipeline circumference that awaits measuring, then transmit the data that record respectively for signal processing unit, make signal processing unit can determine the temperature of the ascending each point in pipeline circumference that awaits measuring based on the data that a plurality of thermocouples surveyed, realize the continuous temperature monitoring to the pipeline circumference multiple point that awaits measuring, the temperature monitoring result of each data point that obtains of measurement can be used for confirming whether accord with the welding process requirement. The pipeline temperature monitoring device can ensure the accuracy and comprehensiveness of temperature monitoring of pre-welding preheating and post-welding heat treatment.
The welding seam 100 of the fixing band 11 near the pipe 10 to be tested may mean that the distance between the fixing band 11 and the welding seam 100 in the axial direction of the pipe 10 to be tested is small, for example, less than 30 mm.
In the embodiment of the present disclosure, the fixing band 11 is used to fix a plurality of thermocouples 12 on the outer sidewall of the pipe 10 to be measured, on one hand, the fixing band 11 should be high temperature resistant and not affected by preheating before welding, welding and heat treatment after welding, on the other hand, it is good to achieve a heat transfer effect, and it does not affect the temperature measurement of the thermocouples 12 on the pipe to be measured.
In one possible implementation, the thermocouple 12 has a probe end and a trace connected to the probe end;
the probe end of the thermocouple 12 is fixed on one surface of the fixing band 11 facing the outer wall of the pipeline 10 to be tested, and the routing is fixed on one surface of the fixing band 11 facing away from the outer wall of the pipeline 10 to be tested.
In the implementation mode, the probe ends of the thermocouples 12 are fixed on one surface of the fixing belt 11, and when the fixing belt is wound around the circumference of a pipeline, the probe ends of the thermocouples 12 can be tightly attached to the wall surface of the pipeline for measurement; the wire of the thermocouple 12 is fixed on the other side of the fixing band 11, and when the wire is wound on the circumferential direction of the pipeline, the influence of the high temperature of the wall surface of the pipeline on the wire arrangement can be reduced. Illustratively, one end of the wire is connected to the probe end, and the other end of the wire can pass through the fixing tape 11, and then the middle portion of the wire is fixed on the fixing tape 11 and then connected to the signal processing unit 13.
Exemplarily, the fixing band 11 may be a silica gel composite cloth fixing band, the silica gel composite cloth is a high temperature resistant heat insulation material, and the fixing band made of the silica gel composite cloth may satisfy the above requirements for the fixing band.
The silica gel composite cloth fixing band is fixed on the outer side wall of the pipeline to be detected in a winding mode, and the stability of the whole pipeline temperature monitoring device is guaranteed.
Since the fixing band 11 mainly serves to fix the thermocouple 12, a certain width is required to be provided for placing the thermocouple 12. Illustratively, the width of the fixing band 11 may range from 80 mm to 120 mm.
In the plurality of thermocouples 12, the distance between two adjacent thermocouples 12 is in the range of 100mm to 200 mm, and the thermocouples 12 are arranged according to the distance range, so that the temperature of the pipeline to be measured can be comprehensively monitored.
Wherein, a plurality of thermocouples 12 can be circumferentially arranged on the outer side wall of the pipeline in a uniformly spaced manner. That is, the spacing between any two adjacent thermocouples 12 is the same.
Illustratively, the size of the distance between the adjacent thermocouples 12 is positively correlated with the size of the pipe diameter of the pipe to be measured, that is, the larger the pipe diameter of the pipe to be measured is, the larger the distance between the adjacent thermocouples 12 is, the smaller the pipe diameter of the pipe to be measured is, and the smaller the distance between the adjacent thermocouples 12 is.
For example, taking a high-pressure natural gas pipeline with a pipe diameter of 1016mm as an example, the circumference of the cross section of the pipeline is about 3190mm, and the circumference of the fixing belt is about equal to the circumference of the pipeline. Thermocouples are arranged on the fixing belt at intervals of 100mm, and 32 thermocouples are arranged in total.
Fig. 3 is a block diagram of a signal processing unit according to an embodiment of the disclosure. Referring to fig. 3, the signal processing unit 13 includes a plurality of processing subunits 130 corresponding to the plurality of input channels;
each processing subunit 130 comprises an analog-to-digital converter 131, a filter 132, an amplifier 133 and a temperature conversion circuit 134 which are electrically connected in sequence, wherein the analog-to-digital converter 131 is also electrically connected with the input channel.
The analog-to-digital converter 131 is configured to convert an analog signal output by the thermocouple 12 into a digital signal; the filter 131 is configured to filter the digital signal output by the analog-to-digital converter 131, so as to remove noise therein; the amplifier 132 is used for amplifying the filtered digital signal; the temperature conversion circuit 134 is used for analyzing the amplified digital signal to obtain a temperature value.
For example, the temperature conversion circuit 134 may be implemented by a single chip.
Fig. 4 is a schematic structural diagram of a pipeline temperature monitoring device provided in an embodiment of the present disclosure. Referring to fig. 4, the pipe temperature monitoring apparatus further includes, in comparison with the pipe temperature monitoring apparatus of fig. 2:
and a storage unit 14 electrically connected to the signal processing unit 13.
In this implementation manner, the storage unit 14 is electrically connected to the signal processing unit 13, so that the temperature value of the pipeline to be measured output by the signal processing unit 13 can be saved.
Illustratively, the storage units 14 are electrically connected to the plurality of processing subunits 130 in the signal processing unit 13, respectively.
Since the signal processing unit 13 includes a plurality of processing sub-units 130 corresponding to the plurality of input channels, and the plurality of input channels and the plurality of thermocouples 12 are in one-to-one correspondence, the temperature output by each processing sub-unit 130 is measured by the corresponding thermocouple 12, and the position of each thermocouple 12 on the pipe 10 to be measured is fixed, so that a number can be assigned to the position of each thermocouple 12, and the number can be used as the number corresponding to each processing sub-unit 130. When storing the temperature, the storage unit 14 may store the time corresponding to the temperature value, and may store a number corresponding to the temperature value, which indicates the temperature measured at which position on the pipe 10 to be measured.
In the related art, when an infrared thermometer is used for measurement, the temperature record is an artificial paper record, so that electronization is difficult to realize, data filling may be wrong due to skill level or misoperation of an operator, and the actual situation of a field cannot be traced. The storage unit 14 stores temperature data in the welding process, the temperature value and the temperature value are synchronously stored, and powerful data tracing can be provided for the welding process when the welding process of the welding port is analyzed.
Referring again to fig. 4, the pipe temperature monitoring apparatus may further include:
and a display unit 15 electrically connected to the signal processing unit 13.
In this implementation manner, the temperature value output by the signal processing unit 13 may be displayed, and during the display, the temperature values at each position on the pipeline 10 to be measured may be displayed respectively.
Illustratively, the display unit 15 may be a liquid crystal display.
The multi-channel temperature values measured in real time are clearly displayed on the liquid crystal display screen, and the temperature condition of the pipeline to be measured can be known by a worker in real time.
Referring again to fig. 4, the pipe temperature monitoring apparatus may further include:
and the alarm unit 16 is electrically connected with the signal processing unit 13.
The alarm unit 16 may be provided with a threshold range of the temperature of the pipe to be measured, which is favorable for the welding process, and when the temperature monitored by the signal processing unit 13 is in the threshold range, it indicates that the welding condition is satisfied, and displays an indication that the welding condition is satisfied; and when the temperature monitored by the signal processing unit 13 exceeds the threshold range, which indicates that the welding condition is not met, alarming.
For example, the threshold range of the temperature of the pipe to be measured may include a threshold range of a preheating temperature of the pre-weld preheating, a threshold range of an interlayer temperature of the pre-weld preheating, and a threshold range of a post-weld heat treatment temperature.
Wherein, the preheating temperature that the pipeline that awaits measuring weld the preheating is different according to the material difference of pipeline with the interlayer temperature that the pipeline that awaits measuring welded, and corresponding threshold value scope sets up also differently: for example, the preheating temperature of a 15CrMo steel pipeline has a threshold range of not more than 180 ℃ and the interlayer temperature has a threshold range of below 300 ℃; the preheating temperature of the carbon steel high-pressure pipeline is in a threshold range of 100-200 ℃, and the interlayer temperature is not more than 250 ℃; the stainless steel pipeline and the nickel-based pipeline can be not preheated, and the threshold range of the interlayer temperature is ensured to be less than or equal to 150 ℃. For alloy steel pipelines and chrome molybdenum steel pipes which need to be subjected to postweld heat treatment, heat treatment is carried out within 30min after welding construction is completed, and the threshold range of postweld heat treatment temperature is 300-500 ℃.
The alarm unit 16 may further include a plurality of levels, for example, a first threshold range and a second threshold range, where a yellow alarm is performed when the temperature exceeds the first threshold range, a red alarm is performed when the temperature exceeds the second threshold range, and the like.
The alarm unit 16 may determine the current stage and the material of the pipe to be measured based on the user operation, and thus select an appropriate threshold range.
In the embodiment of the present disclosure, the storage unit 14, the display unit 15, and the alarm unit 16 may be integrated into a single device, for example, a computer is used to implement the storage unit 14, the display unit 15, and the alarm unit 16.
When the computer is adopted to realize the units, data in the computer can be copied through the USB flash disk and transferred to other equipment for processing or storing.
Of course, the above units may also be separately arranged, for example, the alarm unit 16 may be an audible and visual alarm, which may perform an audible and visual alarm when the temperature exceeds the threshold range, for example, an indicator light flashes, and an alarm is performed through voice prompt.
The pipeline temperature monitoring device provided by the embodiment of the disclosure can realize online temperature monitoring, alarming and data recording of the high-pressure natural gas pipeline during pre-welding preheating and post-welding heat treatment. The pipeline temperature monitoring device has the following characteristics:
(1) the pipeline temperature can be monitored at multiple points simultaneously, the detection points cover the cross section of the pipeline for a circle, the obtained data are comprehensive, and the detection method is convenient and fast;
(2) the temperature over-limit alarm can be set to remind welding personnel of timely noticing the condition of over-low or over-high temperature, so that the safe operation of welding is ensured;
(3) the temperature data can be recorded, and the related data can be stored in a storage unit, such as a computer, so that the data statistics and analysis can be performed subsequently.
The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.
Claims (10)
1. A pipeline temperature monitoring device, characterized in that, pipeline temperature monitoring device includes:
the fixing belt (11) is wrapped on the outer wall of the pipeline to be detected (10) along the circumferential direction of the pipeline to be detected (10), and the fixing belt (11) is close to a welding seam (100) of the pipeline to be detected (10);
the thermocouples (12) are positioned on the fixing band (11), and the thermocouples (12) are arranged at intervals along the circumferential direction of the pipeline (10) to be measured;
and the signal processing unit (13) is provided with a plurality of input channels which are respectively and correspondingly and electrically connected with the thermocouples (12).
2. The pipe temperature monitoring device of claim 1, wherein the thermocouple (12) has a probe end and a trace connected to the probe end;
the probe end of the thermocouple (12) is fixed on one surface, facing the outer wall of the pipeline to be tested, of the fixing belt (11), and the routing is fixed on one surface, facing away from the outer wall of the pipeline to be tested, of the fixing belt (11).
3. The pipeline temperature monitoring device according to claim 1, wherein the fixing band (11) is a silica gel composite cloth fixing band.
4. The pipeline temperature monitoring device according to claim 1, wherein the width of the fixing band (11) ranges from 80 mm to 120 mm.
5. The pipe temperature monitoring device according to any one of claims 1 to 4, wherein, among the plurality of thermocouples (12), a pitch between two thermocouples (12) arranged adjacently is in a range of 100mm to 200 mm.
6. The pipeline temperature monitoring device according to any one of claims 1 to 4, characterized in that the signal processing unit (13) comprises a plurality of processing subunits (130) corresponding to the plurality of input channels;
each processing subunit (130) comprises an analog-to-digital converter (131), a filter (132), an amplifier (133) and a temperature conversion circuit (134) which are electrically connected in sequence, and the analog-to-digital converter (131) is also electrically connected with the input channel.
7. The pipe temperature monitoring device according to any one of claims 1 to 4, further comprising:
and the storage unit (14) is electrically connected with the signal processing unit (13).
8. The pipe temperature monitoring device according to any one of claims 1 to 4, further comprising:
and a display unit (15) electrically connected to the signal processing unit (13).
9. The pipeline temperature monitoring device according to claim 8, wherein the display unit (15) is a liquid crystal display.
10. The pipe temperature monitoring device according to any one of claims 1 to 4, further comprising:
and the alarm unit (16) is electrically connected with the signal processing unit (13).
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| CN202022693625.4U CN215726424U (en) | 2020-11-19 | 2020-11-19 | Pipeline temperature monitoring device |
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| CN202022693625.4U CN215726424U (en) | 2020-11-19 | 2020-11-19 | Pipeline temperature monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024037313A1 (en) * | 2022-08-18 | 2024-02-22 | 深圳市合元科技有限公司 | Multi-point temperature measurement device, aerosol generation device and temperature control method |
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2020
- 2020-11-19 CN CN202022693625.4U patent/CN215726424U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024037313A1 (en) * | 2022-08-18 | 2024-02-22 | 深圳市合元科技有限公司 | Multi-point temperature measurement device, aerosol generation device and temperature control method |
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