CN115574965A - Temperature measuring assembly for high-temperature high-pressure small-caliber pipeline - Google Patents
Temperature measuring assembly for high-temperature high-pressure small-caliber pipeline Download PDFInfo
- Publication number
- CN115574965A CN115574965A CN202211252458.7A CN202211252458A CN115574965A CN 115574965 A CN115574965 A CN 115574965A CN 202211252458 A CN202211252458 A CN 202211252458A CN 115574965 A CN115574965 A CN 115574965A
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- temperature measuring
- cavity
- temperature
- joint
- thermocouple
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
Abstract
The invention discloses a temperature measuring component for a high-temperature high-pressure small-caliber pipeline, which comprises a temperature measuring joint, a thermocouple sleeve, a temperature measuring pipe seat and a temperature measuring tee joint, wherein the temperature measuring joint is connected with the thermocouple sleeve; the device has simple structure, low cost and convenient manufacture, installation and maintenance, and the adopted parts can be realized by simple mechanical processing; the method can be widely popularized and used for pipeline systems below DN25 under various process parameter environments, and original enlarged pipes in the market are replaced; the temperature measuring device can be well used in a small-caliber pipeline system, solves the problems of installation, large pressure loss and measurement precision of an interpolation type thermocouple (resistance), makes up the blank of the field of accurate temperature measurement of the small-caliber pipeline, and can be widely popularized along with the rapid development of industrialization, and the market demand is increased day by day.
Description
Technical Field
The invention belongs to the technical field of temperature measurement, and particularly relates to a temperature measurement assembly for a high-temperature high-pressure small-caliber pipeline.
Background
With the rapid development of industrialization, temperature measurement technology is becoming mature, and in contact temperature measurement technology, thermocouples (resistors) are widely used due to their advantages of wide measurement range, high measurement accuracy, stable performance, etc.
At present, the installation modes of contact type thermocouples (resistors) in a pipeline system are mainly divided into insertion installation and wall-attached installation. The adherence mounting operation is simple, but the application is less because the adherence mounting is arranged on the outer wall of the pipeline and the temperature of the process fluid in the pipeline can not be accurately reflected. In the measurement of the temperature of the pipeline system, the inserted thermocouple (resistor) can be directly contacted with the process fluid, and although the installation is more complicated than the adherent installation, the thermocouple can truly reflect the temperature of the process fluid, so the thermocouple is widely adopted.
At the present stage, the thermocouple (resistance) insertion installation mode of a high-temperature high-pressure small-caliber pipeline (below DN 25) system mostly adopts a mode of locally increasing the pipe diameter, commonly called as an enlarged pipe; when the arrangement of the pipeline system is dense, direct opening insertion installation is generally adopted.
When the thermocouple (resistor) is installed by adopting the expanding pipe, the diameter is generally expanded to DN80, and the first-stage diameter change of the DN80 standard reducing pipe can only be changed to DN32, so that the insertion installation of the thermocouple (resistor) can be met by the multi-stage diameter change of the pipeline with the pipe diameter smaller than the DN 32. In addition, the interval between the circumferential welding seams of the high-temperature and high-pressure pipelines is required to be 100mm at minimum, so that the minimum length space required by the installation of the expanded pipe is 400mm. The adoption of the enlarged pipe installation not only influences the overall arrangement of a pipeline system, but also causes the change of the related thermotechnical parameters of the process fluid due to the change of the pipe diameter.
When the direct opening of the pipeline is inserted and the thermocouple (resistor) is installed, the sleeve of the thermocouple (resistor) is inserted into the pipeline along the radial direction of the pipeline, so that the sleeve of the thermocouple (resistor) not only becomes a resistance part to cause larger pressure loss to the system, but also the insertion depth of the sleeve is not easy to control, and the accuracy of measured data is difficult to control
Disclosure of Invention
In order to solve the problems, the invention aims to provide an interpolation type thermocouple temperature measuring assembly suitable for a small-caliber pipeline system, which is convenient for pipeline system arrangement, simplifies installation and reduces the influence of instrument installation on a main process system and temperature measurement precision.
In order to achieve the aim, the invention provides a temperature measuring assembly for a high-temperature high-pressure small-caliber pipeline, which comprises a temperature measuring joint, a thermocouple sleeve, a temperature measuring pipe seat and a temperature measuring tee joint; the right end of the temperature measuring joint is in butt welding connection with the left end of the thermocouple sleeve to form a thermocouple protective sleeve; the middle bulge part of the temperature measuring joint is in butt welding connection with the temperature measuring tube seat; the thermocouple sleeve is arranged in the cavity of the temperature tube seat; the other end of the temperature measuring tube seat is in butt welding connection with the temperature measuring tee.
Furthermore, the left end of the temperature measuring joint is cylindrical, an inner/outer thread groove is formed in the inner side of the cylinder, and a middle bulge of the temperature measuring joint is a conical bulge; the conical bulge is narrow at the left side and wide at the right side.
Further, the thermowell adopts
The seamless steel pipe is processed, one end of the seamless steel pipe is plugged by argon arc welding surfacing, and the seamless steel pipe is polished and polished after plugging is finished, so that the thickness of the surfacing is not more than 1.2mm.
Furthermore, the size of the right end of the temperature measuring joint corresponds to the size of the thermowell.
Furthermore, a tapered groove is formed in the left end of the temperature measuring tube seat, and the tapered groove is wide and narrow on the left; the inner diameter and the wall thickness of the right end of the temperature measuring tube seat are consistent with the butt welding connection part of the temperature measuring tee.
Furthermore, the inner diameter and the wall thickness of the right end of the temperature measuring tee joint 4 are consistent with those of the measured pipeline, and the temperature measuring tee joint is in butt welding connection with the measured pipeline; a cavity A is arranged in the pipeline to be detected; the temperature measuring tee joint is provided with four cavities in total, namely a cavity B, a cavity C, a cavity D and a cavity E; the cavity B is communicated with the cavity A; and the cavity C is respectively communicated with the cavity B, the cavity D and the cavity E.
Furthermore, the cavity B is a reducing cavity, the inner diameter of the right side of the cavity B is consistent with that of the cavity A, and the inner diameter of the left side of the cavity B is consistent with that of the cavity C.
Further, the size of the inner diameter of the cavity No. D is consistent with that of the inner diameter of the cavity No. A; the size of the inner diameter of the cavity E is consistent with that of the inner diameter of the cavity C.
Furthermore, the end part of the thermocouple sleeve is arranged in the No. C cavity, and the installation depth is 1-2cm beyond the center line of the medium outlet.
Furthermore, the cavity E is a flow dead zone, and the thermocouple sensing area is located in the cavity C.
It should be noted that, the left and right parts mentioned in the above text are all referred to the angle provided by the drawings of the specification, and are not totally left or right. Compared with the prior art, the invention achieves the following technical achievements:
(1) The device has simple structure, low cost and convenient manufacture, installation and maintenance, and the adopted parts can be realized by simple mechanical processing; the method can be widely popularized and used for pipeline systems below DN25 under various process parameter environments, and original enlarged pipes in the market are replaced;
(2) The device can be used in a small-caliber pipeline system well, solves the problems of installation, large pressure loss and measurement precision of an interpolation type thermocouple (resistance), and fills the blank in the field of accurate temperature measurement of small-caliber pipelines. With the rapid development of industrialization, the method is inevitably popularized and the market demand is increased day by day.
Drawings
In order to more clearly illustrate the present invention or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below. It is obvious that the figures in the following description are only some embodiments of the invention, and that other figures may also be derived by a person skilled in the art from the present figures.
FIG. 1 is an overall cross-sectional view of a temperature measurement assembly of the present invention;
FIG. 2 is an exploded view of the structural components of the temperature measuring assembly of the present invention;
FIG. 3 is a schematic view of a temperature measuring joint;
FIG. 4 is a schematic view of a thermowell configuration;
FIG. 5 is a schematic view of a thermo-tube base;
FIG. 6 is a schematic view of a temperature measuring tee joint;
FIG. 7 is a schematic view of the operation of the temperature measuring assembly of the present invention.
Description of reference numerals: 1. a temperature measuring joint; 2. a thermowell; 3. a temperature tube base; 4. and (4) measuring the temperature of the tee joint.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The schematic diagram of the invention is shown in fig. 1-7, the invention provides a temperature measuring assembly for a high-temperature high-pressure small-caliber pipeline, which comprises a temperature measuring joint 1, a thermocouple well 2, a temperature measuring pipe seat 3 and a temperature measuring tee joint 4; the right end of the temperature measuring joint 1 and the left end of the thermocouple sleeve 2 are in butt welding connection to form a thermocouple protective sleeve, so that fluid is prevented from directly contacting a thermocouple; the middle bulge part of the temperature measuring joint 1 is in butt welding connection with the temperature measuring tube seat 3, and forms a sealing structure together with the thermocouple well 2 and the temperature measuring tee joint 4, so that the tightness of a pipeline system is ensured; the thermocouple sleeve 2 is arranged in a cavity of the temperature measuring tube seat 3; the other end of the temperature measuring tube seat 3 is connected with the temperature measuring tee joint 4 in a butt welding mode.
Preferably, the temperature measuring joint 1 is forged by a metal bar, the left end of the temperature measuring joint is cylindrical, an inner/outer thread groove is formed in the inner side of the cylinder, and a middle bulge of the temperature measuring joint 1 is a conical bulge; the conical bulge is narrow at the left side and wide at the right side.
Preferably, the thermowell 2 is adopted
The seamless steel pipe is processed, one end of the seamless steel pipe is plugged by argon arc welding surfacing, and the seamless steel pipe is polished and polished after plugging is finished, so that the thickness of the surfacing is not more than 1.2mm.
Preferably, the size of the right end of the temperature measuring joint 1 corresponds to the size of the thermowell 2.
Preferably, the temperature measuring tube seat 3 is forged by a metal bar, a tapered groove is formed in the left end of the temperature measuring tube seat, and the tapered groove is wide and narrow on the left; the inner diameter and the wall thickness of the right end of the temperature measuring tube seat 3 are consistent with the butt welding connection part of the temperature measuring tee joint 4. The middle bulge of the temperature measuring joint 1 is matched with the conical groove of the temperature measuring tube seat 3, and the structural strength after butt welding is further ensured because the conical inclined planes of the middle bulge and the conical groove are opposite.
Preferably, the outer diameters and the wall thicknesses of the left end of the temperature measuring tee joint 4 and the right end of the temperature measuring tube seat 3 are kept consistent and are in butt welding connection, the inner diameter and the wall thickness of the right end of the temperature measuring tee joint 4 are kept consistent and are in butt welding connection with a measured pipeline, and a cavity A is arranged in the measured pipeline; the temperature measuring tee joint 4 is provided with four cavities in total, namely a cavity B, a cavity C, a cavity D and a cavity E; the cavity A is a medium inlet; the cavity B is communicated with the cavity A; and the cavity C is respectively communicated with the cavity B, the cavity D and the cavity E.
Preferably, the cavity B is a reducing cavity, the inner diameter of the right side of the cavity B is consistent with that of the cavity A, and the inner diameter of the left side of the cavity B is consistent with that of the cavity C.
Preferably, the size of the inner diameter of the cavity No. D is consistent with that of the inner diameter of the cavity No. A; the size of the inner diameter of the cavity E is consistent with that of the inner diameter of the cavity C.
Preferably, the end part of the thermowell 2 is installed in the No. C cavity, and the installation depth is 1-2cm beyond the midline of a medium outlet.
Preferably, the cavity E is a flow dead zone, and the sensing area of the thermocouple is in the cavity C.
It should be noted that, the left end of the temperature measuring joint and the thermocouple are fixedly installed, and the side can be processed into different forms and sizes according to actual needs, such as forms of internal threads, welding, sleeve connection and the like.
When the temperature measuring assembly is used, the temperature measuring assembly is required to be installed at the turning position of a pipeline, the medium flows to the position shown in figure 7, the medium enters from the No. A cavity of the measured pipeline and passes through the No. B cavity, the No. B cavity is a reducing pipe, the inner diameter of the pipeline is properly enlarged, on one hand, the thermocouple (resistance) sleeve is prevented from excessively occupying the flow area of the pipeline, and on the other hand, the fluid is also promoted to be fully contacted with the sleeve; fluid flows through cavity B and then enters cavity C and then enters cavity D, and the inner diameters of the cavity D and the cavity A are the same. The end part of the thermocouple (resistance) sleeve is arranged in the cavity C, the installation depth is 1-2cm beyond the center line of the medium outlet, the cavity E is a flow dead zone, but the thermocouple (resistance) induction area is arranged in the cavity C, so the flow dead zone does not influence the measurement accuracy.
The assembly is simple in installation form and small in occupied space, not only optimizes the arrangement of a pipeline system, but also solves the problems of pressure loss and measurement precision, and meets the requirements of users.
The above is only a preferred embodiment of the present technology, and the protection scope of the present technology is not limited to the above-mentioned embodiments, and any technical solutions that belong to the technical idea belong to the protection scope of the present technology. It should be noted that modifications and adaptations to those techniques may occur to one skilled in the art without departing from the principles of the present technique and are intended to be within the scope of the present technique. . The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. A temperature measuring component for a high-temperature high-pressure small-caliber pipeline comprises a temperature measuring joint, a thermocouple sleeve, a temperature measuring pipe seat and a temperature measuring tee joint; the right end of the temperature measuring joint is in butt welding connection with the left end of the thermocouple sleeve to form a thermocouple protective sleeve; the middle bulge part of the temperature measuring joint is in butt welding connection with the temperature measuring tube seat; the thermocouple sleeve is arranged in the cavity of the temperature tube seat; the other end of the temperature measuring tube seat is in butt welding connection with the temperature measuring tee.
2. The temperature measuring assembly for the high-temperature high-pressure small-caliber pipeline according to claim 1, wherein: the left end of the temperature measuring joint is cylindrical, an inner/outer thread groove is formed in the inner side of the cylinder, and a middle bulge of the temperature measuring joint is a conical bulge; the conical bulge is narrow at the left side and wide at the right side.
3. The temperature measuring assembly for the high-temperature high-pressure small-caliber pipeline according to claim 1, wherein: the thermocouple sleeve adopts
The seamless steel pipe is processed, one end of the seamless steel pipe is plugged by argon arc welding surfacing, and the seamless steel pipe is polished and polished after plugging is finished, so that the thickness of the surfacing is not more than 1.2mm.
4. The temperature measuring assembly for the high-temperature high-pressure small-caliber pipeline according to claim 3, wherein: the size of the right end of the temperature measuring joint corresponds to the size of the thermocouple sleeve.
5. The temperature measuring assembly for the high-temperature high-pressure small-caliber pipeline according to claim 1, wherein: the left end of the temperature measuring tube seat is provided with a conical groove, and the left side of the conical groove is wide and narrow; the inner diameter and the wall thickness of the right end of the temperature measuring tube seat are consistent with the butt welding connection part of the temperature measuring tee.
6. The temperature measuring assembly for the high-temperature high-pressure small-caliber pipeline according to claim 1, wherein: the inner diameter and the wall thickness of the right end of the temperature measuring tee joint 4 are consistent with those of the measured pipeline, and the temperature measuring tee joint is in butt welding connection with the measured pipeline; a cavity A is arranged in the pipeline to be detected; the temperature measuring tee joint is provided with four cavities in total, namely a cavity B, a cavity C, a cavity D and a cavity E; the cavity B is communicated with the cavity A; and the cavity C is respectively communicated with the cavity B, the cavity D and the cavity E.
7. The temperature measuring assembly for the high-temperature high-pressure small-caliber pipeline according to claim 6, wherein: the cavity B is a reducing cavity, the right inner diameter is consistent with the cavity A, and the left inner diameter is consistent with the cavity C.
8. The temperature measuring assembly for the high-temperature high-pressure small-caliber pipeline according to claim 6, wherein: the size of the inner diameter of the cavity D is consistent with that of the cavity A; the size of the inner diameter of the cavity E is consistent with that of the inner diameter of the cavity C.
9. The temperature measuring assembly for the high-temperature high-pressure small-caliber pipeline according to claim 6, wherein: the end part of the thermocouple sleeve is arranged in the No. C cavity, and the installation depth is 1-2cm beyond the center line of the medium outlet.
10. The temperature measurement assembly for a high temperature high pressure small bore pipeline of claim 6, wherein: the cavity E is a flow dead zone, and the thermocouple sensing area is arranged in the cavity C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211252458.7A CN115574965A (en) | 2022-10-13 | 2022-10-13 | Temperature measuring assembly for high-temperature high-pressure small-caliber pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211252458.7A CN115574965A (en) | 2022-10-13 | 2022-10-13 | Temperature measuring assembly for high-temperature high-pressure small-caliber pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115574965A true CN115574965A (en) | 2023-01-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211252458.7A Pending CN115574965A (en) | 2022-10-13 | 2022-10-13 | Temperature measuring assembly for high-temperature high-pressure small-caliber pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115574965A (en) |
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2022
- 2022-10-13 CN CN202211252458.7A patent/CN115574965A/en active Pending
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