CN217953714U - Temperature measuring sleeve, thermocouple device and temperature measuring structure - Google Patents
Temperature measuring sleeve, thermocouple device and temperature measuring structure Download PDFInfo
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- CN217953714U CN217953714U CN202222067960.2U CN202222067960U CN217953714U CN 217953714 U CN217953714 U CN 217953714U CN 202222067960 U CN202222067960 U CN 202222067960U CN 217953714 U CN217953714 U CN 217953714U
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Abstract
The utility model belongs to the technical field of the pipeline temperature measurement, concretely relates to temperature measurement sleeve pipe. To current thermocouple (hinder) device use in more harsher environment like the easy cracked not enough of sleeve pipe on the high temperature high pressure high flow rate pipeline, the utility model discloses a following technical scheme: the temperature measuring sleeve comprises a columnar body, wherein the columnar body is provided with an inserting end and a connecting end, an axial blind hole is formed in the center of the connecting end, and spiral ribs extending along the axial direction of the columnar body are formed on the outer surface of the inserting end. The utility model discloses a temperature measurement sheathed tube beneficial effect is: the outer surface of the insertion end of the columnar body is provided with the spiral ribs extending along the axial direction, the spiral ribs can effectively avoid forming obvious Karman vortex streets, and the amplitude of dispersed vortices is reduced to avoid causing vibration, so that the vibration frequency of the temperature measuring sleeve is obviously reduced; the spiral ribs also increase the contact area and can shorten the corresponding time.
Description
Technical Field
The utility model belongs to the technical field of the pipeline temperature measurement, concretely relates to thermocouple device is particularly useful for on high temperature high pressure hydrogenation pipeline, high pressure steam conduit, the heat exchanger. The utility model discloses relate to a temperature measurement sleeve pipe and temperature measurement structure simultaneously.
Background
On a high-pressure main steam pipeline of a power plant, a high-temperature high-pressure pipeline of a hydrogenation device in the chemical industry and a large-scale heat exchanger pipeline, the problem of high resonance frequency exists in temperature measurement due to high temperature, high pressure, high flow speed and high frequency vortex excitation. The thermowell manufactured by the traditional method (see fig. 1) can not meet the high-frequency resonance requirement that the self-vibration frequency of the thermowell is equal to the eddy excitation frequency, and the problem that the welding part of the thermowell and the flange is directly broken because the welding part can not resist the resonance frequency often occurs. In the past, the casing pipe is broken and directly rushes into a steam turbine, so that the blades of the steam turbine are seriously damaged.
When measuring the temperature of a high-temperature high-pressure high-flow-rate pipeline, if the insertion length of the sleeve is too low, the temperature measurement is not accurate enough. In order to ensure accurate temperature measurement, the insertion length of the sleeve needs to be ensured, and in order to ensure the strength of the sleeve, the diameter of the sleeve needs to be increased. However, the diameter of the sleeve is limited by the inner diameter of the high pressure nozzle on the pipe to be tested.
One method that is currently relatively effective is to make a boss in the middle of the sleeve, which is shorter in length, to reduce resonance by a smaller fit clearance between the boss and the high pressure nozzle (see fig. 2). However, since the high-pressure nozzle and the high-pressure flange are connected by welding according to the standard, welding slag inevitably remains in the high-pressure nozzle, and the inner diameter of the high-pressure nozzle that is practically usable is reduced. Because the available internal diameter of the high-pressure nozzle is reduced, the clearance between the sleeve and the high-pressure nozzle returns to the original level, and the vibration frequency of the sleeve is still unqualified.
Although the high-pressure nozzle and the high-pressure flange can be manufactured into a whole to avoid the welding slag problem, the standard of the integration of the nozzle and the flange is not available at present, so that the practical application of the high-pressure nozzle and the high-pressure flange is greatly limited. More importantly, the sleeve with the boss relieves the resonance problem to a certain extent, but the problem of insufficient strength still occurs when the insertion length is required to be longer, the flow speed is higher, the temperature is higher and the pressure is higher in the large-diameter pipeline.
SUMMERY OF THE UTILITY MODEL
The utility model discloses use the easy cracked not enough of sleeve pipe on the environment that is more harsh like high temperature high pressure high velocity of flow pipeline to current thermocouple device, provide a thermocouple device, use when high temperature high pressure high velocity of flow pipeline, the sleeve pipe is difficult for splitting.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the temperature measuring sleeve comprises a columnar body, wherein the columnar body is provided with an inserting end and a connecting end, an axial blind hole is formed in the center of the connecting end, and spiral ribs extending along the axial direction of the columnar body are formed on the outer surface of the inserting end.
The temperature measuring sleeve of the utility model has the columnar body as in the prior art, but is different from the prior art, the outer surface of the inserting end of the columnar body forms the spiral rib which extends along the axial direction of the columnar body, the spiral rib can effectively avoid forming obvious Karman vortex street, and the vibration is avoided by reducing the amplitude of the dispersed vortex, thereby obviously reducing the vibration frequency of the temperature measuring sleeve, and leading the actual vibration frequency of the temperature measuring sleeve to be far lower than the natural frequency of the temperature measuring sleeve; the spiral ribs also increase the contact area, and can shorten the response time of temperature measurement.
As the improvement, the number of the spiral ribs is three. When the number of the spiral ribs is one or two, the effect of avoiding the formation of the Karman vortex street is weaker due to less number of the spiral ribs; when the number of the spiral ribs is more than three, the spiral ribs are too dense due to more number, and the processing difficulty is increased. The number of the spiral ribs is three, so that the vibration frequency is reduced and the processing difficulty is reduced.
As a refinement, the spiral ribs have a plurality of strips extending in parallel. The plurality of spiral ribs extend in parallel without being staggered.
As an improvement, the columnar body is at least provided with a first section and a second section, the first section is positioned at the insertion end, the outer diameter of the first section is smaller than that of the second section, the spiral rib is formed on the first section, and one end, close to the connecting end, of the spiral rib is connected with the end face of the second section.
As a refinement, the sum of the outer diameter of the first section and the dimension of the helical rib in the radial direction of the cylindrical body is not greater than the outer diameter of the second section. The radial dimension of the connecting end is not less than that of the inserting end, and vibration frequency is effectively reduced.
As an improvement, the cross section of the spiral rib is arc-shaped, and the spiral rib and the columnar body are in arc transition.
As an improvement, the sections of the spiral ribs are the same, namely the sections of the spiral ribs are consistent in size, and the end faces of the spiral ribs can be subjected to chamfering treatment and the like in order to prevent people from being injured and the like.
As an improvement, the columnar body is integrally conical.
As improvement, the nano ceramic is sprayed on the surface of the temperature measuring sleeve, so that the hydrogen embrittlement resistance and corrosion resistance are improved, the high-flow-rate scouring resistance and wear resistance are improved, and the service life of a high-requirement thermocouple is greatly prolonged.
As an improvement, the temperature measuring sleeve is formed by forging and pressing so as to facilitate the processing of the spiral ribs.
The utility model provides a thermocouple device for high temperature high pressure high velocity of flow pipeline, includes temperature measurement flange and temperature measurement sleeve pipe, the temperature measurement sleeve pipe is aforementioned temperature measurement sleeve pipe, temperature measurement sleeve pipe's link with temperature measurement flange rigid coupling, the installation is crossed the line bracket component on the temperature measurement flange, cross line bracket component upper end and be equipped with the terminal box, be equipped with temperature thermocouple in the terminal box, temperature thermocouple passes cross the line bracket component with the temperature measurement flange and get into in temperature measurement sleeve pipe's the blind hole.
As an improvement of the thermocouple device, the temperature measuring flange is welded with the temperature measuring sleeve. The welding mode is through welding or welding of the upper end face and the lower end face after threaded connection.
The utility model provides a high temperature high pressure high flow rate pipeline temperature measurement structure, including the temperature pipe that awaits measuring, weld in the mouthpiece on the temperature pipe that awaits measuring, with mouthpiece welded flange, the last thermocouple device of installation of flange, the thermocouple device is aforementioned thermocouple device.
The utility model discloses a temperature measurement sleeve pipe's beneficial effect is: the outer surface of the insertion end of the columnar body is provided with the spiral ribs extending along the axial direction, the spiral ribs can effectively avoid forming obvious Karman vortex streets (the principle is similar to a gun barrel rifling), and the vibration is avoided by reducing the amplitude of dispersed vortices, so that the vibration frequency of the temperature measuring sleeve is obviously reduced; the spiral ribs also increase the contact area and can shorten the corresponding time.
The utility model discloses a thermocouple device and temperature measurement structure have all adopted the utility model discloses a thermocouple device's for high temperature high pressure high velocity of flow pipeline temperature sleeve pipe has the utility model discloses a thermocouple device's for high temperature high pressure high velocity of flow pipeline temperature sleeve pipe's whole beneficial effects.
The utility model discloses a temperature sleeve pipe, thermocouple device or temperature measurement structure, of course also can be applied to low temperature pipeline, low pressure pipeline and low velocity of flow pipeline.
Drawings
Fig. 1 is a schematic structural diagram of a conventional pipeline temperature measurement structure.
Fig. 2 is a schematic structural diagram of another conventional pipeline temperature measurement structure.
Fig. 3 is a schematic structural diagram of a pipeline temperature measurement structure according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a temperature measuring sleeve of a pipeline temperature measuring structure according to an embodiment of the present invention.
Fig. 5 is a schematic structural view of another temperature measuring sleeve and temperature measuring flange welded according to the embodiment of the present invention.
Fig. 6 is a schematic structural view of another temperature measuring sleeve and temperature measuring flange welded according to the embodiment of the present invention.
In the figure, 1, a pipeline to be measured in temperature;
2. a nozzle;
3. a connecting flange;
4. a temperature measuring flange;
5. a temperature measuring sleeve; 51. a columnar body; 511. a first stage; 512. a second stage; 52. spiral ribs.
Detailed Description
The technical solutions of the inventive embodiments of the present invention will be explained and illustrated below with reference to the drawings of the inventive embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all of them. Other embodiments obtained by those skilled in the art without any creative work based on the embodiments in the implementation belong to the protection scope of the present invention.
Referring to fig. 3 to 6, the utility model discloses a high temperature high pressure high velocity of flow pipeline temperature measurement structure, including the warm pipeline that awaits measuring, weld in the mouthpiece on the warm pipeline that awaits measuring, with mouthpiece welded flange, install thermocouple device on the flange, thermocouple device includes temperature measurement flange and temperature measurement sleeve pipe, the temperature measurement sleeve pipe includes the column body, the column body has to insert end and link, the axial blind hole is seted up at the link center, insert the end surface and form the edge column body axial extension's spiral rib, the temperature measurement flange set up with the communicating through-hole of blind hole, temperature measurement sheathed tube link with temperature measurement flange rigid coupling, install the line bracket component on the temperature measurement flange, it is equipped with the terminal box to cross line bracket component upper end, be equipped with the temperature thermocouple in the terminal box, the temperature thermocouple passes cross the line bracket component with the through-hole gets into in the blind hole.
The utility model discloses a high temperature high pressure high flow velocity pipeline temperature measurement structure, the spiral rib that extends along the column body axial is formed to the insertion end surface of its temperature measurement sheathed tube column body, and the spiral rib can effectively avoid forming obvious Karman vortex street, through reducing the amplitude of dispersion swirl, avoids arousing the vibration to show the reduction temperature measurement sleeve pipe vibration frequency, makes the temperature measurement sleeve pipe actual vibration frequency far less than its natural frequency; the spiral ribs also increase the contact area, and can shorten the response time of temperature measurement.
Embodiments of the thermometric Structure
Referring to fig. 3 and 4, the embodiment of the utility model provides a high temperature high pressure high flow velocity pipeline temperature measurement structure, include treat temperature measurement pipeline 1, weld in treat on the temperature measurement pipeline 1 mouthpiece 2, with mouthpiece 2 welded flange 3, installation thermocouple device on the flange 3, thermocouple device includes temperature measurement flange 4 and temperature measurement sleeve pipe 5, temperature measurement sleeve pipe 5 includes column body 51, column body 51 has inserts end and link, the axial blind hole is seted up at the link center, it forms the edge to insert the end surface column body 51 axially extending's spiral rib 52, the through-hole is seted up to temperature measurement flange 4, temperature measurement sleeve pipe 5's link with temperature measurement flange 4 rigid coupling, install the wire support subassembly on the temperature measurement flange 4, wire support subassembly upper end is equipped with the terminal box, be equipped with temperature thermocouple in the terminal box, temperature thermocouple passes the wire support subassembly and gets into in the blind hole.
In this embodiment, the number of the spiral ribs 52 is three. When the number of the spiral ribs 52 is one or two, the effect of avoiding the formation of the karman vortex street is weaker due to the small number; when the number of the spiral ribs 52 is larger than three, the number of the spiral ribs 52 is large, the spiral ribs 52 are too dense, and the processing difficulty is increased. The number of the spiral ribs 52 is three, so that the vibration frequency is reduced and the processing difficulty is reduced.
In this embodiment, the three helical ribs 52 extend in parallel, rather than staggered.
In this embodiment, the cylindrical body 51 has a first section 511 and a second section 512, the first section 511 is located at the insertion end, the outer diameter of the first section 511 is smaller than that of the second section 512, the spiral rib 52 is formed on the first section 511, and one end of the spiral rib 52 close to the connection end is connected with the end face of the second section 512.
In this embodiment, the end of the spiral rib 52 remote from the connection end is substantially flush with the end of the first segment 511 remote from the connection end.
In this embodiment, the sum of the outer diameter of the first section 511 and the radial dimension of the spiral rib 52 along the cylindrical body 51 is not greater than the outer diameter of the second section 512. The radial dimension of the connecting end is not less than that of the inserting end, and vibration frequency is effectively reduced.
In this embodiment, the cylindrical body 51 is tapered, and the radial dimension of the insertion end is smaller than that of the connection end. In this embodiment, the first section 511 and the second section 512 are both tapered.
In other embodiments, the cylindrical body 51 may also have a third or more segments. When the insertion depth is 1m, the columnar body 51 has three sections each having a tapered shape.
In this embodiment, the cross section of the spiral rib 52 is circular arc, and the spiral rib 52 and the cylindrical body 51 are in circular arc transition.
In this embodiment, the cross-sections of the spiral ribs 52 are the same, i.e., the cross-sections of the spiral ribs 52 have the same size. The end faces of the spiral ribs 52 may be chamfered to prevent injury to a person or the like.
In the embodiment, the nano ceramic is sprayed on the surface of the temperature measuring sleeve 5, so that the hydrogen embrittlement resistance and corrosion resistance are improved, the high-flow-rate scouring resistance and wear resistance are improved, and the service life of a high-requirement thermocouple is greatly prolonged.
In this embodiment, the temperature measuring flange 4 is welded to the temperature measuring sleeve 5.
In this embodiment, the temperature measuring sleeve 5 is inserted into the temperature measuring flange 4 and welded.
Referring to fig. 5, in another welding structure of the temperature measuring flange 4 and the temperature measuring sleeve 5, the temperature measuring sleeve 5 penetrates through the temperature measuring flange 4, and the temperature measuring sleeve 4 and the temperature measuring flange 4 are welded through penetration or fusion.
Referring to fig. 6, in another welding structure of the temperature measuring flange 4 and the temperature measuring sleeve 5, the temperature measuring sleeve 5 penetrates through the temperature measuring flange 4 to be in threaded connection, and the upper surface and the lower surface are welded.
The utility model discloses temperature measurement structure has obtained actual verification, compares prior art and possesses better performance. Specifically, the design requirements of the main steam high-pressure pipeline of a certain project of steam turbine are as follows: the operating temperature is 550 ℃; the working pressure is 10MPa; the flow rate was 28m/s. Before the temperature detection thermocouple, a Mitsubishi electric appliance in Japan is adopted for matching, a structure similar to that in figure 1 is adopted (in order to prevent breakage, the sleeve 5 does not extend out of the pipeline 1 to be measured with temperature), the sleeve 5 adopts a graduation number K, the diameter of the sleeve 5 is 20, the insertion length (namely the length of the sleeve 5) is 250mm, and the actual work shows that the temperature fluctuates between 420 and 520 ℃. This project was modified in march 2022, requiring the insertion length to increase to 350mm. If the formula is calculated from the vibration frequency calculation table of the sleeve 5 (from ASME PTC 19.3), the insertion length can be only 280mm even if the diameter of the sleeve 5 is increased to 36. This is not possible at all with conventional designs. The improved scheme is as follows: graduation number K, flange drift diameter DN40, pressure grade PN42MPa (2500 LB), diameter 28 of the sleeve pipe 5 is conical, the sleeve pipe 5 is inserted by 360mm, axial length of the spiral rib 52 is 150mm, and the temperature measuring flange 4 is welded with the temperature measuring sleeve pipe 5. After the improved scheme is adopted, the temperature display is always kept between 526 and 535 ℃, and the linearity is kept stable.
Adopt the utility model discloses a temperature measurement structure, 5 vibration frequency of sleeve pipe calculate and can break through ASME PTC 19.3, even do not satisfy ASME PTC 19.3 requirement promptly, but still can satisfy actual vibration frequency requirement.
The embodiment of the utility model provides a high temperature high pressure high velocity of flow pipeline temperature measurement structure's beneficial effect is: the outer surface of the insertion end of the columnar body 51 of the temperature measuring sleeve 5 is provided with the spiral ribs 52 extending along the axial direction, the spiral ribs 52 can effectively avoid forming obvious Karman vortex streets, and the vibration is avoided by reducing the amplitude of dispersed vortex, so that the vibration frequency of the temperature measuring sleeve 5 is obviously reduced; the spiral ribs 52 also increase the contact area, which can shorten the corresponding time; further, the spiral ribs 52 are optimized.
The utility model discloses a temperature sleeve 5 and thermocouple device are requested to protect simultaneously.
Other endless structures may be referred to in the drawings and/or in the art.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the contents described in the above specific embodiments. Any modification which does not depart from the functional and structural principles of the invention is intended to be included within the scope of the claims.
Claims (10)
1. A temperature measuring sleeve is characterized in that: the temperature measuring sleeve (5) comprises a cylindrical body (51), the cylindrical body (51) is provided with an inserting end and a connecting end, an axial blind hole is formed in the center of the connecting end, and spiral ribs (52) extending along the axial direction of the cylindrical body (51) are formed on the outer surface of the inserting end.
2. The thermometric sleeve of claim 1, wherein: the number of the spiral ribs (52) is three; the spiral ribs (52) are provided with a plurality of parallel extending ribs.
3. The thermometric sleeve of claim 1, wherein: the cylindrical body (51) is at least provided with a first section (511) and a second section (512), the first section (511) is positioned at the insertion end, the outer diameter of the first section (511) is smaller than that of the second section (512), the spiral ribs (52) are formed on the first section (511), and one end, close to the connection end, of each spiral rib (52) is connected with the end face of the second section (512).
4. The thermometric sleeve of claim 3, wherein: the sum of the outer diameter of the first section (511) and the size of the spiral ribs (52) along the radial direction of the cylindrical body (51) is not larger than the outer diameter of the second section (512).
5. The thermometric sleeve of claim 1, wherein: the cross section of the spiral rib (52) is arc-shaped, and the spiral rib (52) and the columnar body (51) are in arc transition; the cross sections of the spiral ribs (52) are the same.
6. The thermometric sleeve of claim 1, wherein: the whole columnar body (51) is conical; the surface of the temperature measuring sleeve (5) is sprayed with nano ceramic; and the temperature measuring sleeve (5) is formed by forging and pressing.
7. The utility model provides a thermocouple device, includes temperature measurement flange (4) and temperature sleeve pipe (5), its characterized in that: the temperature measuring sleeve (5) is the temperature measuring sleeve (5) according to any one of claims 1 to 6, the connecting end of the temperature measuring sleeve (5) is fixedly connected with the temperature measuring flange (4), the temperature measuring flange (4) is provided with a wire passing support component, the upper end of the wire passing support component is provided with a junction box, a temperature measuring thermocouple is arranged in the junction box, and the temperature measuring thermocouple penetrates through the wire passing support component and the temperature measuring flange (4) and enters the blind hole of the temperature measuring sleeve (5).
8. A thermocouple device according to claim 7, wherein: the temperature measuring flange (4) is welded with the temperature measuring sleeve (5).
9. A thermocouple device, according to claim 8, wherein: the temperature measurement flange (4) is in through welding with the temperature measurement sleeve (5), or the temperature measurement flange (4) is in threaded connection with the temperature measurement sleeve (5) and then the upper end face and the lower end face are welded.
10. The utility model provides a high velocity of flow pipeline temperature measurement structure, includes to treat temperature measurement pipeline (1), weld in treat mouthpiece (2) on temperature measurement pipeline (1), with mouthpiece (2) welded flange (3), install thermocouple device on flange (3), its characterized in that: the thermocouple device is as claimed in any one of claims 7 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222067960.2U CN217953714U (en) | 2022-08-04 | 2022-08-04 | Temperature measuring sleeve, thermocouple device and temperature measuring structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222067960.2U CN217953714U (en) | 2022-08-04 | 2022-08-04 | Temperature measuring sleeve, thermocouple device and temperature measuring structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217953714U true CN217953714U (en) | 2022-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222067960.2U Active CN217953714U (en) | 2022-08-04 | 2022-08-04 | Temperature measuring sleeve, thermocouple device and temperature measuring structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217953714U (en) |
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2022
- 2022-08-04 CN CN202222067960.2U patent/CN217953714U/en active Active
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