CN111289134B - Multipoint flexible thermocouple/resistor with conical sealing cavity - Google Patents
Multipoint flexible thermocouple/resistor with conical sealing cavity Download PDFInfo
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- CN111289134B CN111289134B CN202010113956.8A CN202010113956A CN111289134B CN 111289134 B CN111289134 B CN 111289134B CN 202010113956 A CN202010113956 A CN 202010113956A CN 111289134 B CN111289134 B CN 111289134B
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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
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
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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
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
Abstract
The invention discloses a multi-point flexible thermocouple/resistor with a conical sealing cavity, which comprises a flange connected with an equipment process interface, wherein the flange is welded with a conical part of the conical sealing cavity, and the top of the conical sealing cavity is welded with a first sealing connecting plate; a secondary sealing cavity is welded on the other side of the first sealing connecting plate, a second sealing connecting plate is arranged at the upper part of the secondary sealing cavity, the secondary sealing cavity is connected with a junction box through a supporting plate, and a guide rail type terminal connection base is arranged in the junction box; and the flexible armored temperature elements sequentially penetrate through the flange, the conical sealing cavity, the first sealing connecting plate, the secondary sealing cavity, the second sealing connecting plate and the bottom of the junction box to be connected with the guide rail type terminal connection base, and the flexible armored temperature elements are respectively fixedly connected with the first sealing connecting plate and the second sealing connecting plate in a welding mode. The invention realizes the installation of the multipoint flexible thermocouple/resistor without changing the size of the process interface and increasing the number of the process interfaces.
Description
Technical Field
The invention relates to the field of temperature measurement, in particular to a multi-point flexible thermocouple/resistor with a conical sealing cavity.
Background
In the oil refining chemical industry and reactor temperature measurement, multi-point flexible thermocouples/resistors are mostly adopted, and in order to ensure the reliable and safe operation of equipment, the thermocouples/resistors adopt a multi-stage safe sealing structure. The key points are as follows: the size of a process interface of the equipment is required to be consistent with the specification and size of a thermocouple/resistor flange, the size of the thermocouple/resistor flange is determined by the number of the thermocouples/resistors and the diameter of an armor, wherein the number of the thermocouples/resistors is determined by the control requirement of a process, the diameter is determined by calculating pressure, temperature and bearing strength, and if the size of the thermocouple/resistor flange is larger than that of the equipment flange, the equipment needs to change the size of the interface flange or additionally arrange an equipment opening; if the equipment opening is additionally arranged, the number of the disassembled thermocouples/resistors needs to be redesigned, the internal installation structure of the reactor needs to be changed, the whole design and installation process relates to processes, equipment and instruments, the operation cost and the labor cost are increased, and potential safety hazards are easily formed.
Disclosure of Invention
The invention aims to provide a multi-point flexible thermocouple/resistor with a conical sealing cavity, which solves the technical problem of mounting the multi-point flexible thermocouple/resistor on the premise of not changing the size of a process interface and increasing the number of interfaces.
In order to achieve the purpose, the invention adopts the following technical scheme:
a multi-point flexible thermocouple/resistor with a conical sealing cavity comprises a flange connected with an equipment process interface, wherein the flange is welded with a conical part of the conical sealing cavity, and the top of the conical sealing cavity is welded with a first sealing connecting plate; a secondary sealing cavity is welded on the other side of the first sealing connecting plate, a second sealing connecting plate is arranged at the upper part of the secondary sealing cavity, the secondary sealing cavity is connected with a junction box through a supporting plate, and a guide rail type terminal connection base is arranged in the junction box; a plurality of flexible armor temperature components pass flange, toper seal chamber, first sealing connection board, secondary seal chamber, second sealing connection board and junction box bottom in proper order and are connected with guide rail type terminal connection terminal, and is a plurality of flexible armor temperature components respectively with first sealing connection board and second sealing connection board welded fastening connection, flexible armor temperature components and first sealing connection board and second sealing connection board junction are provided with the welding protective sheath.
Furthermore, the outside of secondary seal chamber is furnished with leak hunting instrument and combination valves.
Furthermore, the inner diameter of the lower opening of the flange is less than or equal to the inner diameter of the equipment process interface, and the upper opening and the lower opening of the conical sealing cavity are welded together in a size matching manner; the taper of the tapered sealing cavity is consistent with that of the inner hole of the flange, so that all flexible armored temperature elements can smoothly pass through the flange.
Furthermore, the upper end of the conical sealing cavity is of a straight structure, the conical sealing cavity is of a conical structure relative to the whole sealing cavity, the conical sealing cavity of the structure provides a reasonable space for bending of the flexible armored temperature element, and the bending radius of the flexible armored temperature element is met.
Furthermore, welding holes are respectively formed in the first sealing connecting plate and the second sealing connecting plate, and the number of the welding holes in the first sealing connecting plate and the number of the welding holes in the second sealing connecting plate are matched with the number of the measuring points; the size of the welding holes is matched with the outer diameter of the welding protective sleeve, a welding space is reserved between every two adjacent welding holes, welding is convenient, and the welding quality cannot be affected due to the fact that the distance between the welding holes is too close.
Furthermore, the supporting plate is fixedly connected with the junction box through screws, and an electrical interface of the junction box is provided with an explosion-proof Glan head.
Further, the flexible armored temperature element comprises an inner leakage prevention structure, the inner leakage prevention structure comprises a main sealing element, one end of the main sealing element is connected with the armored sleeve through a basic connecting piece, the other end of the main sealing element is connected with a compression sealing element, the main sealing element is of a hollow structure, a high-voltage insulating sealing element is arranged in a cavity of the main sealing element, high-voltage sealant is filled between the inner wall of the main sealing element and the high-voltage insulating sealing element, the high-voltage insulating sealing element has the characteristic of self sealing through compression deformation, and the temperature resistance is more than or equal to 200; a threading hole is formed in the compression sealing element, and a cable lead passes through the threading hole in the compression sealing element and is connected with a temperature measuring element arranged in the cavity of the main sealing element; the high-voltage insulating sealing element wraps the cable lead, the temperature measuring element and the lead arranged in the cavity of the main sealing element, and plays a role in insulating and isolating the lead; high-pressure sealant is filled in a threading hole in which the cable lead is in contact with the compression sealing element; the other end of the temperature measuring element is arranged in the armor.
Further, the high-voltage insulating sealing element comprises a ceramic sealing element, a through hole is formed in the ceramic sealing element and used for penetrating through the cable lead, the temperature measuring element and the lead, high-voltage sealant is filled between the main sealing element and the ceramic sealing element and between the ceramic sealing element and the cable lead, between the ceramic sealing element and the temperature measuring element and between the ceramic sealing element and the lead, the high-voltage sealant is tightly pressed and compacted through the compression sealing element, and is solidified for 10 hours through physical and chemical reactions, so that the high-voltage sealant and the ceramic sealing element are fused, and the bearing pressure of the.
Further, the armor is in brazed connection with a basic connecting piece, and the pressure bearing of the brazed connection position of the basic connecting piece and the armor of the temperature element is more than 40 Mpa; the sealing external thread of the basic connecting piece is connected with the sealing internal thread of the main sealing piece; the compression sealing element is in threaded connection with the main sealing element and is used for compressing the high-voltage insulating sealing element in the main sealing element; the section of the main sealing element is hexagonal or circular; the basic connecting piece, the main sealing piece and the pressing sealing piece are all machined by forging materials.
The invention has the beneficial effects that: the arrangement of multi-point flexible thermocouples/resistance measuring points is realized under the conditions of not changing the size of the process interfaces of the equipment and increasing the number of the process interfaces, so that the installation cost is greatly reduced; when the temperature element is welded to the first sealing connecting plate and the second sealing connecting plate, a reasonable welding space is provided, the welding quality is guaranteed, and the welding part is firm and reliable.
The temperature element is provided with an inner leakage prevention structure, and a conical sealing cavity and a secondary sealing cavity are combined to form secondary sealing for the temperature element, so that the toxic medium in the reactor is effectively prevented from leaking out through the thermocouple/resistance device to cause major safety accidents.
Drawings
FIG. 1 is a view showing the configuration of the present invention;
FIG. 2 is a layout of temperature elements on a sealing web;
FIG. 3 is a cross-sectional view of a tapered seal chamber;
fig. 4 is a schematic view of an inner leakage prevention structure of the temperature element.
Reference numerals: 1. an inner leakage prevention structure; 2. a first seal connection plate; 3. a secondary sealing cavity; 4. welding a protective sleeve; 5. a conical seal cavity; 6. a flange; 7. a rail-type terminal wire holder; 8. a junction box; 9. a support plate; 10. a leak detection instrument and a combined valve group; 11. a flexible sheathed temperature element; 12. a second sealing connection plate; 13. a base connector; 14. a primary seal; 15. compressing the seal; 16. a high voltage insulating seal; 17. high-pressure sealant; 18. brazing points; 19. an armor; 20. and (4) cable leads.
Detailed Description
The invention will be further described with reference to the accompanying drawings and the detailed description below:
example one
The utility model provides a proxy conical seal chamber's multiple spot flexible thermocouple/hinder, includes flange 6, and flange 6 carries out seal welding with conical seal chamber 5, at the even good temperature element 11 of welding of first sealed connection board 2, welds first sealed connection board 2 with conical seal chamber 5 again to under the prerequisite of not changing equipment technology interface size, increased the arrangement area of temperature element, solved and mismatch the connection problem that can't arrange the temperature element that leads to in measurement station quantity and technology interface size.
As shown in fig. 1, a multi-point flexible thermocouple/resistor with a conical sealing cavity comprises a junction box 8, a supporting plate 9, a second sealing connecting plate 12, a secondary sealing cavity 3, a leak detector and combination valve group 10, a conical sealing cavity 5, a first sealing connecting plate 2, a flange 6, a welding protective sleeve 4 and a flexible armored temperature element 11; the junction box 8 is fixedly connected with the supporting plate 9 through screws; in this embodiment, two ends of a secondary sealing cavity 3 are respectively welded with a first sealing connection plate 2 and a second sealing connection plate in a sealing manner, the first sealing connection plate 2 and the second sealing connection plate 12 are both welded with a welding protection sleeve 4 of a flexible armored temperature element 11, the secondary sealing cavity 3 is connected with a junction box 8 through a supporting plate 9, and a leak detection instrument and a combined valve group 10 are installed on the secondary sealing cavity 3;
as shown in fig. 3, in this embodiment, the tapered sealing cavity 5 is a tapered structure, the inner diameter of the lower opening thereof is smaller than or equal to the inner diameter of the process interface of the equipment, the upper portion of the tapered sealing cavity 5 is a straight structure, and the inner diameter of the upper opening thereof satisfies the arrangement and connection of the multi-point flexible thermocouple thermal resistance temperature elements 11.
In this embodiment, the welding position of the flexible armored temperature element 11 is protected by the welding protection sleeve 4, so as to prevent the armored sleeve outside the flexible armored temperature element from being damaged in the welding process.
In this embodiment, the number of the welding holes on the first sealing connection plate 2 and the second sealing connection plate 12 matches with the number of the measuring points, the size of the welding hole matches with the outer diameter of the welding protection sleeve 4, and a welding space is reserved between adjacent welding holes for facilitating welding.
The taper and the associated structure of the tapered sealing cavity are determined by comprehensive calculation and design according to the number of the thermocouples/resistance measuring points, pressure and temperature, the diameter and the wall thickness of the armor, the material of the armor, the standard specification of a flange and the welding process technology. As shown in fig. 2 and 3, optimally arranging the measuring points according to the number of the flexible armored temperature elements, the outer diameter of the welding protective sleeve 4 and the space required by welding, and determining the diameter D of the first sealing connecting plate 2 and the inner diameter D2 of the upper opening of the conical sealing cavity 5; the inner diameter D2 of the lower opening of the conical sealing cavity 5 is equal to the inner diameter of the process opening of the equipment. According to the geometrical relationship, the relationship between the taper angle 2A of the tapered sealed cavity 5 and the height H of the tapered part is as follows: h1/2 cotA (D2-D1), if the taper angle 2A is too large, the corresponding temperature element also needs to be bent greatly when penetrating into the tapered capsule 5, and is not easy or impossible to install, so that the taper angle 2A does not exceed 50 °. After the cone angle is determined, the height H is linearly and positively correlated with the difference (D2-D1) between the inner diameters of the upper opening and the lower opening of the conical sealed cavity 5, and the value of the height H is determined by calculation, thereby determining the basic size of the conical sealed cavity.
As shown in fig. 4, the flexible armored temperature element comprises an inner leakage prevention structure 1, the inner leakage prevention structure 1 comprises a main sealing element 14, one end of the main sealing element 14 is connected with an armored sleeve 19 through a basic connecting element 13, the other end of the main sealing element is connected with a compression sealing element 15, the main sealing element 14 is of a hollow structure, a high-voltage insulating sealing element 16 is arranged in a cavity of the main sealing element 14, high-voltage sealant 17 is filled between the inner wall of the main sealing element 14 and the high-voltage insulating sealing element 16, the high-voltage insulating sealing element 16 has a compression deformation self-sealing characteristic; a threading hole is formed in the compression sealing element 15, and a cable lead 20 passes through the threading hole in the compression sealing element 15 and is connected with a temperature measuring element arranged in the cavity of the main sealing element 14; the high-voltage insulating sealing element 16 wraps the cable lead 20, the temperature measuring element and the lead arranged in the cavity of the main sealing element 14, and plays a role in insulating and isolating the lead; the high-pressure sealant 17 is also filled in the threading hole of the cable lead 20 contacted with the compression sealing element 15; the other end of the temperature sensing element is disposed within the sheath 19.
The high-voltage insulating sealing element 16 comprises a ceramic sealing element, a through hole is formed in the ceramic sealing element and is used for penetrating through the cable lead 20, the temperature measuring element and the lead, high-voltage sealant is filled between the main sealing element 14 and the ceramic sealing element, between the ceramic sealing element and the cable lead, between the temperature measuring element and the lead, and high-voltage sealant is tightly pressed and compacted by the pressing sealing element 15 to perform physical and chemical reaction consolidation for 10 hours, so that the high-voltage sealant 17 and the ceramic sealing element are fused, and the bearing pressure of the formed high-voltage insulating sealing element 16 is.
The armor 19 is connected with the basic connecting piece 13 in a brazing mode, brazing points 18 are shown in figure 4, basic connection is achieved, and the pressure bearing capacity of the brazing connection position of the armor 19 and the armor 13 is larger than 40 Mpa; the sealing external thread of the basic connection piece 13 is connected with the sealing internal thread of the main seal 14; a compression seal 15 is threadedly connected to the main seal 14 for compressing a high pressure insulating seal 16 within the main seal 14; the main seal 14 is hexagonal or circular in cross-section; the basic connector 13, the main seal 14 and the compression seal 15 are all machined from forged material.
Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present invention.
Claims (7)
1. A multi-point flexible thermocouple/resistor with a conical sealing cavity is characterized by comprising a flange connected with an equipment process interface, wherein the flange is welded with a conical part of the conical sealing cavity, and the top of the conical sealing cavity is welded with a first sealing connecting plate; a secondary sealing cavity is welded on the other side of the first sealing connecting plate, a second sealing connecting plate is arranged at the upper part of the secondary sealing cavity, the secondary sealing cavity is connected with a junction box through a supporting plate, and a guide rail type terminal connection base is arranged in the junction box; the flexible armored temperature elements sequentially penetrate through the flange, the conical sealing cavity, the first sealing connecting plate, the secondary sealing cavity, the second sealing connecting plate and the bottom of the junction box to be connected with the guide rail type terminal junction box;
the flexible armored temperature element comprises an inner leakage prevention structure, the inner leakage prevention structure comprises a main sealing element, one end of the main sealing element is connected with the armored sleeve through a basic connecting piece, the other end of the main sealing element is connected with a compression sealing element, the main sealing element is of a hollow structure, a high-voltage insulating sealing element is arranged in a cavity of the main sealing element, high-voltage sealant is filled between the inner wall of the main sealing element and the high-voltage insulating sealing element, and the high-voltage insulating sealing element has a compression deformation characteristic and can resist temperature of more than or equal to 200 ℃; a threading hole is formed in the compression sealing element, and a cable lead passes through the threading hole in the compression sealing element and is connected with a temperature measuring element arranged in the cavity of the main sealing element; the high-voltage insulating sealing element wraps the cable lead, the temperature measuring element and the lead arranged in the cavity of the main sealing element, and plays a role in insulating and isolating the lead; high-pressure sealant is filled in a threading hole in which the cable lead is in contact with the compression sealing element; the other end of the temperature measuring element is arranged in the armor; the high-voltage insulation sealing element comprises a ceramic sealing element, a perforation is arranged in the ceramic sealing element and used for penetrating through a cable lead, a temperature measuring element and a lead, high-voltage sealant is filled between the main sealing element and the ceramic sealing element, between the ceramic sealing element and the cable lead, between the temperature measuring element and the lead, and the high-voltage sealant is tightly pressed and compacted by the compression sealing element, and is solidified for 10 hours through physical and chemical reactions, so that the high-voltage sealant and the ceramic sealing element are fused, and the bearing pressure of the high-voltage insulation sealing element is more than.
2. The multi-point flexible thermocouple/resistor with the conical sealed cavity as claimed in claim 1, wherein the outside of the secondary sealed cavity is provided with a leak detector and a combination valve set.
3. The multi-point flexible thermocouple/resistor with the conical sealing cavity as claimed in claim 1, wherein the inner diameter of the lower opening of the flange is less than or equal to the inner diameter of the equipment process interface, and the upper opening and the lower opening of the conical sealing cavity are welded together in a size fit manner; the taper of the tapered sealing cavity is consistent with that of the inner hole of the flange, so that all flexible armored temperature elements can smoothly pass through the flange.
4. The multi-point flexible thermocouple/resistor with a tapered sealed cavity as claimed in claim 1, wherein the upper end of the tapered sealed cavity is straight.
5. The multipoint flexible thermocouple/resistor with the conical sealing cavity as claimed in claim 1, wherein the first sealing connecting plate and the second sealing connecting plate are respectively provided with welding holes, and the number of the welding holes on the first sealing connecting plate and the number of the welding holes on the second sealing connecting plate are both matched with the number of the measuring points; the size of the welding holes is matched with the outer diameter of the welding protective sleeve, and a reasonable welding space is reserved between every two adjacent welding holes.
6. The multipoint flexible thermocouple/resistor with the conical sealed cavity as claimed in claim 1, wherein the supporting plate is fixedly connected with a junction box through screws, and an electrical interface of the junction box is provided with an explosion-proof Glan head.
7. The multi-point flexible thermocouple/resistor with a tapered sealed cavity according to claim 1, wherein the armor is brazed to a primary connecting member, and the primary connecting member is brazed to the temperature element armor at a pressure of > 40 Mpa; the sealing external thread of the basic connecting piece is connected with the sealing internal thread of the main sealing piece; the compression sealing element is in threaded connection with the main sealing element and is used for compressing the high-voltage insulating sealing element in the main sealing element; the section of the main sealing element is hexagonal or circular; the basic connecting piece, the main sealing piece and the pressing sealing piece are all machined by forging materials.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010113956.8A CN111289134B (en) | 2020-02-24 | 2020-02-24 | Multipoint flexible thermocouple/resistor with conical sealing cavity |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010113956.8A CN111289134B (en) | 2020-02-24 | 2020-02-24 | Multipoint flexible thermocouple/resistor with conical sealing cavity |
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| CN111289134A CN111289134A (en) | 2020-06-16 |
| CN111289134B true CN111289134B (en) | 2020-09-29 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112519304B (en) * | 2020-11-12 | 2022-12-13 | 钢研昊普科技有限公司 | Multipoint temperature measurement leading-out device of hot isostatic pressing machine |
| CN115194412A (en) * | 2022-07-22 | 2022-10-18 | 马鞍山市安马电子设备实业有限公司 | Manufacturing method of thermocouple TC flange pressing plate and combined flange structure |
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Effective date of registration: 20230906 Address after: 100000 22 Chaoyangmen North Street, Chaoyang District, Beijing. Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: ZIBO YIYUAN ENGINEERING & TECHNOLOGY Co.,Ltd. Address before: No.377 Zicheng Road, Zichuan District, Zibo City, Shandong Province 255100 Patentee before: ZIBO YIYUAN ENGINEERING & TECHNOLOGY Co.,Ltd. |