Thermocouple assembly and installation structure thereof

Abstract

The utility model belongs to the technical field of thermocouples, and particularly relates to a thermocouple assembly and an installation structure thereof, the thermocouple assembly comprises a thermocouple core, ceramic protection tubes and a fixed tube, the ceramic protection tubes are sleeved outside the thermocouple core at intervals, and one end of the thermocouple core and one end of each ceramic protection tube extend out of the fixed tube. A sealing structure is arranged between the other end of the couple core and the fixing tube, and the other end of the ceramic protection tube is in sealing connection with the fixing tube. The thermocouple core and the ceramic protection tube are arranged at intervals, the ceramic protection tube is fixedly arranged on the inner wall of one end of the fixed tube, and the other end of the thermocouple core and the other end of the ceramic protection tube are provided with the sealing structure, so that the sealing structure still exists between the thermocouple core and the fixed tube even if the sealing between the ceramic protection tube and the fixed tube fails in a temperature measurement process; therefore, the sealing of the thermocouple end is still effective, the service life of the thermocouple is prolonged, the frequency of replacing the thermocouple is reduced, and the operation time is saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of thermocouple, specifically relates to a thermocouple assembly and mounting structure thereof. BACKGROUND

[0002] In the field of petroleum chemical industry and coal chemical industry, the temperature measurement of high-temperature high-pressure furnace (equipment) often uses thermocouples, which monitor the temperature of the furnace body in real time. In the prior art, a ceramic protection tube is fixedly sleeved outside the core, and the ceramic protection tube is sealingly installed at the temperature measuring port of the high-temperature high-pressure furnace. Once the seal between the ceramic protection tube and the temperature measuring port fails, the medium is likely to leak, the leaked medium is sprayed along the thermocouple, the detection equipment is damaged, and serious safety accidents such as fire and explosion are likely to occur, and the thermocouple is also damaged, so that the service life of the thermocouple is short. SUMMARY

[0003] The utility model aims at overcoming the defects of the prior art, and provides a thermocouple assembly and mounting structure thereof, which further seals the thermocouple and prolongs the service life of the thermocouple.

[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of a thermocouple assembly, which comprises a core, a ceramic protection tube and a fixed tube. The ceramic protection tube is sleeved outside the core at intervals, and one end of the core and the ceramic protection tube protrudes out of the fixed tube. A sealing structure is arranged between the other end of the core and the fixed tube, and the other end of the ceramic protection tube is sealingly connected to the fixed tube.

[0005] Preferably, the other end of the core and the ceramic protection tube is arranged in the fixed tube, the inner side of the fixed tube is provided with a sealing protrusion, the ceramic protection tube is arranged on one side of the sealing protrusion, the other end of the core passes through the middle of the sealing protrusion, and the sealing structure is arranged on the other side of the sealing protrusion.

[0006] Preferably, the sealing structure comprises a sealing filler, the sealing filler is arranged between the core and the fixed tube, and the sealing filler is pressed on the sealing protrusion by an inner pressure nut.

[0007] Preferably, the sealing structure further comprises a core sealant, and the core sealant is arranged in the other end of the core.

[0008] Preferably, the outer wall of the ceramic protection tube is fixedly installed on the inner wall of one end of the fixed tube through a fixing sealant.

[0009] A mounting structure of a thermocouple assembly, comprising the above-mentioned thermocouple assembly, a mounting tube and an end sealing assembly, one end of the thermocouple assembly is fixedly installed on an inner furnace wall, one end of the core and the ceramic protection tube passes through the inner furnace wall, the other end of the thermocouple assembly is connected to one end of the mounting tube, and the end sealing assembly is arranged at the other end of the mounting tube.

[0010] Preferably, a mounting boss is arranged at one end of the fixed tube, and a temperature measuring hole is arranged on the inner furnace wall, and the outer wall of the temperature measuring hole is arranged outwardly protruding, and the mounting nut is pressed against the mounting boss and connects the fixed tube at the temperature measuring hole of the inner furnace wall.

[0011] Preferably, the end sealing assembly comprises a sealing cylinder, a sealing plug and a pressing column, one end of the sealing cylinder is fixedly connected to the other end of the mounting tube, the inner diameter of the end of the sealing cylinder away from the thermocouple assembly is larger than the inner diameter of the other end, the pressing column is arranged in the end of the sealing cylinder with larger inner diameter, and the pressing column presses the sealing plug in the sealing cylinder.

[0012] Preferably, a pressing nut is arranged at the other end of the sealing cylinder, the pressing nut is threadedly connected to the outer wall of the other end of the sealing cylinder, and the pressing nut presses the pressing column.

[0013] Preferably, the furnace wall temperature measuring thermocouple and the cavity temperature measuring thermocouple are further arranged, the temperature measuring end of the furnace wall temperature measuring thermocouple abuts against the outer wall of the inner furnace wall, the temperature measuring end of the cavity temperature measuring thermocouple is arranged in the cavity outside the inner furnace wall, and the furnace wall temperature measuring thermocouple, the cavity temperature measuring thermocouple and the mounting tube are fixedly connected through the connecting assembly.

[0014] Preferably, the connecting assembly is a connecting block, a mounting tube mounting hole is arranged in the middle of the connecting block, the mounting tube is arranged through the mounting tube mounting hole, two side holes are arranged on both sides of the mounting tube mounting hole, the furnace wall temperature measuring thermocouple and the cavity temperature measuring thermocouple are arranged through one side hole respectively, and a threaded hole is arranged on one side of the mounting tube mounting hole and the side hole, and the furnace wall temperature measuring thermocouple, the cavity temperature measuring thermocouple and the mounting tube are all fixed through the fixing bolt.

[0015] Preferably, a mounting block is arranged on the outer wall of the inner furnace wall, and the temperature measuring end of the furnace wall temperature measuring thermocouple is inserted into the mounting block.

[0016] Compared with the prior art, the above technical scheme has the following beneficial effects:

[0017] 1、The thermocouple core and the ceramic protection tube are arranged at intervals, the ceramic protection tube is fixedly arranged at one end of the fixed tube, and a sealing structure is further arranged at the other end of the thermocouple core and the ceramic protection tube, so that the leakage of medium is easy to occur at the thermocouple temperature measuring position of the high-temperature and high-pressure furnace, the leaked medium is sprayed along the thermocouple, the detection equipment is damaged, and serious safety accidents such as fire and explosion are easy to occur, in the temperature measuring process of the utility model, even if the sealing between the ceramic protection tube and the fixed tube fails, there is still a sealing structure between the thermocouple core and the fixed tube, so that the sealing of the thermocouple end is still effective, the service life of the thermocouple is prolonged, the replacement frequency of the thermocouple is reduced, and the operation time is saved.

[0018] 2. The other end of the core is provided with a core sealing glue, which can prevent the leaked gas from entering the core and protect the core, and when one end of the core is damaged, the core sealing glue seals the other end of the core, prevents the furnace gas from entering the cavity outside the furnace wall, and prevents the furnace gas from leaking to the outside of the furnace.

[0019] 3. The furnace wall temperature measuring thermocouple and the cavity temperature measuring thermocouple are further provided, which can measure the temperature of the outer wall of the inner furnace wall and the cavity, and even if the temperature measuring of the thermocouple assembly is damaged or inaccurate, the temperature of the high-temperature and high-pressure furnace can be judged through the furnace wall temperature measuring thermocouple and the cavity temperature measuring thermocouple. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of the thermocouple assembly.

[0021] Figure 2 It is a partial installation structure schematic view of the thermocouple assembly.

[0022] Figure 3 It is a front view of the connecting block.

[0023] Figure 4 It is an installation structure schematic view of the thermocouple assembly.

[0024] Wherein: 1, core 2, ceramic protection tube 3, fixed sealing glue 4, fixed tube 5, installation nut 6, core sealing glue 7, sealing filler 8, inner compression nut 9, inner furnace wall 10, locking nut 11, gasket 12, installation tube 13, furnace wall temperature measuring thermocouple 14, cavity temperature measuring thermocouple 15, connecting block 16, fixed bolt 17, installation block 18, sealing cylinder 19, welding seam 20, sealing plug 21, compression column 22, compression nut 23, installation tube installation hole 24, side hole 25, secondary sealing 26, junction box 27, temperature measuring port 28, thermocouple assembly 29, furnace wall flange 30, high-temperature and high-pressure container wiring device 31, installation bolt 32, primary sealing 33, sealing protrusion 34, installation boss. DETAILED DESCRIPTION

[0025] Figures 1-4 It is the best embodiment of the utility model, and the following will be combined with the drawings to further explain the utility model. Figures 1-4 The utility model is further explained.

[0026] As Figure 1As shown, a thermocouple assembly of this utility model includes a thermocouple core 1, a ceramic protective tube 2, and a fixing tube 4. The ceramic protective tube 2 is spaced out on the outside of the thermocouple core 1. One end of both the thermocouple core 1 and the ceramic protective tube 2 extends out of the fixing tube 4. The thermocouple core 1 is also located inside the fixing tube 4. A sealing structure is provided between the other end of the thermocouple core 1 and the fixing tube 4. The other end of the ceramic protective tube 2 is sealed to the fixing tube 4 through a fixing sealant 3. The fixing sealant 3 is a high-temperature sealant. Even if the seal between the ceramic protective tube 2 and the fixing tube 4 fails, the sealing structure still exists between the thermocouple core 1 and the fixing tube 4, and the seal remains effective.

[0027] The other ends of the coupling core 1 and the ceramic protective tube 2 are both set inside the fixed tube 4. The inner side of the fixed tube 4 is provided with a sealing protrusion 33. The ceramic protective tube 2 is set on one side of the sealing protrusion 33. The sealing protrusion 33 protrudes inward from the inner wall of the fixed tube 4. The inner diameter of the fixed tube 4 at the sealing protrusion 33 is smaller. The sealing protrusion 33 is set at the other end of the ceramic protective tube 2. The other end of the ceramic protective tube 2 rests on the sealing protrusion 33. The other end of the coupling core 1 passes through the middle of the sealing protrusion 33. The sealing structure is set on the other side of the sealing protrusion 33.

[0028] The sealing structure includes a sealing filler 7, which is disposed between the coupling core 1 and the fixed tube 4. The sealing filler 7 is pressed onto the sealing protrusion 33 by an inner pressure nut 8. The inner pressure nut 8 enters the fixed tube 4 from the other end and presses the sealing filler 7. The sealing structure also includes a coupling core sealant 6, which is disposed inside the other end of the coupling core 1 to seal and fix the end of the coupling core 1. The coupling core sealant 6 is also a high-temperature sealant.

[0029] like Figure 2 As shown, the installation structure of a thermocouple assembly of the present invention includes the aforementioned thermocouple assembly 28, mounting tube 12, and end sealing assembly. One end of the thermocouple assembly 28 is fixedly installed on the inner furnace wall 9. One end of the thermocouple core 1 and the ceramic protective tube 2 passes through the inner furnace wall 9 for temperature measurement. The other end of the thermocouple assembly 28 is connected to one end of the mounting tube 12, and the end sealing assembly is disposed at the other end of the mounting tube 12.

[0030] Specifically, a mounting boss 34 is provided at one end of the fixed pipe 4, and a temperature measuring port 27 is provided on the inner furnace wall 9. The ceramic protective tube 2 and the coupling core 1 enter the high-temperature and high-pressure furnace through the temperature measuring port 27 to measure the temperature. The outer wall of the temperature measuring port 27 protrudes outward, and a thread is provided on the protruding outer wall of the temperature measuring port 27. The mounting nut 5 presses the mounting boss 34 and connects the fixed pipe 4 to the temperature measuring port 27 on the inner furnace wall 9. The mounting nut 5 is threaded and fixed at the temperature measuring port 27. One end of the mounting pipe 12 is fixedly connected to the other end of the fixed pipe 4, and a gasket 11 is provided between the mounting pipe 12 and the fixed pipe 4. A locking nut 10 is provided at the end of the mounting pipe 12 and is threadedly connected to the fixed pipe 4.

[0031] The end sealing assembly comprises a sealing cylinder 18, a sealing plug 20 and a compression column 21, one end of the sealing cylinder 18 is welded and fixed at the other end of the mounting pipe 12, there is a welding seam 19 at the joint of the sealing cylinder 18 and the mounting pipe 12, the inner diameter of the end of the sealing cylinder 18 away from the thermocouple assembly 28 is larger than that of the other end, the left end of the inner cavity of the sealing cylinder 18 is large, the right end of the inner cavity is small, the compression column 21 is arranged in the end of the sealing cylinder 18 with larger inner diameter, and the compression column 21 compresses the sealing plug 20 in the sealing cylinder 18. A compression nut 22 is arranged at the other end of the sealing cylinder 18, the compression nut 22 is threadedly connected to the outer wall of the other end of the sealing cylinder 18, and the compression nut 22 is rotated to compress the compression column 21, so that the inner cavity of the sealing cylinder 18 is sealed. The compression nut 22, the compression column 21 and the sealing plug 20 are all provided with through holes for the signal line to pass through, and the end of the compression nut 22 is also provided with a locking nut 10.

[0032] The mounting structure of the thermocouple assembly also comprises a furnace wall temperature measuring thermocouple 13 and a cavity temperature measuring thermocouple 14. The temperature measuring end of the furnace wall temperature measuring thermocouple 13 abuts against the outer wall of the inner furnace wall 9 and measures the temperature of the outer furnace wall in real time. The temperature measuring end of the cavity temperature measuring thermocouple 14 is arranged in the cavity outside the inner furnace wall 9 and monitors the temperature of the outer cavity in real time. The furnace wall temperature measuring thermocouple 13, the cavity temperature measuring thermocouple 14 and the mounting pipe 12 are fixedly connected through a connecting assembly. Even if the thermocouple assembly 28 fails to measure the temperature, the temperature measured by the furnace wall temperature measuring thermocouple 13 and the cavity temperature measuring thermocouple 14 can be used to determine whether the temperature in the furnace is normal. The mounting block 17 is arranged on the outer wall of the inner furnace wall 9, and the temperature measuring end of the furnace wall temperature measuring thermocouple 13 is fixedly installed on the mounting block 17, so as to stabilize the temperature measuring position of the furnace wall temperature measuring thermocouple 13.

[0033] As shown in Figure 3 The connecting assembly is a connecting block 15, a mounting pipe mounting hole 23 is formed in the middle of the connecting block 15, the diameter of the mounting pipe mounting hole 23 corresponds to the diameter of the mounting pipe 12, the mounting pipe 12 passes through the mounting pipe mounting hole 23, two side holes 24 are formed on the two sides of the mounting pipe mounting hole 23, the side holes 24 correspond to the diameters of the furnace wall temperature measuring thermocouple 13 and the cavity temperature measuring thermocouple 14, the furnace wall temperature measuring thermocouple 13 and the cavity temperature measuring thermocouple 14 pass through one side hole 24 respectively, threaded holes are formed on the upper side of the mounting pipe mounting hole 23 and the side hole 24, the furnace wall temperature measuring thermocouple 13, the cavity temperature measuring thermocouple 14 and the mounting pipe 12 are all fixed through fixing bolts 16, the three fixing bolts 16 are threadedly connected in the threaded holes respectively, and the ends of the three fixing bolts 16 abut against the mounting pipe 12, the furnace wall temperature measuring thermocouple 13 and the cavity temperature measuring thermocouple 14 respectively, so as to fix them.

[0034] As shown in Figure 4As shown, the thermocouple assembly 28 is installed at the temperature measuring port 27 of the inner furnace wall 9, and the thermocouple assembly 28 and the mounting pipe 12 are arranged in the outer cavity of the high-temperature and high-pressure furnace, the odd core 1 is connected to the junction box 26, the odd core 1 converts the measured temperature signal into an electric signal and transmits it to the junction box 26, the high-temperature and high-pressure container wiring device 30 is fixedly connected to the furnace wall flange 29 outside the outer cavity through the mounting bolt 31, the high-temperature and high-pressure container wiring device 30 and the furnace wall flange 29 are provided with threading holes, the junction box 26 is connected to the side of the high-temperature and high-pressure container wiring device 30 away from the furnace wall flange 29, and the signal line of the odd core 1 passes through the high-temperature and high-pressure container wiring device 30 and the furnace wall flange 29 to connect the junction box 26. The high-temperature and high-pressure container wiring device 30 adopts the Chinese invention patent with the patent number 2021105651117, realizes multi-stage sealing, and sets a group of wiring posts as three groups of wiring posts, wherein the ceramic sealing element for mounting the wiring post can be replaced after the component is damaged.

[0035] The medium is easy to leak at the thermocouple assembly 28 of the high-temperature and high-pressure furnace, the leaked medium is sprayed along the thermocouple assembly 28, damage to the detection equipment is caused, and serious safety accidents such as fire and explosion are easy to occur, the sealing device is arranged on the high-temperature and high-pressure container wiring device 30, the sealing device comprises a primary seal 32 and a secondary seal 25, the primary seal 32 and the secondary seal 25 are arranged between the junction box 26 and the furnace wall flange 29, sealing structures are also arranged in the cavity between the primary seal 32 and the secondary seal 25, and sealing structures are also arranged at the wiring position of the high-temperature and high-pressure container wiring device 30 close to the furnace wall flange 29, and the detailed structure and sealing principle of the sealing structure at the high-temperature and high-pressure container wiring device 30 can be known from the Chinese invention patent with the patent number 2021105651117, and thus will not be described here.

[0036] In use, the thermocouple assembly 28 is installed at the temperature measuring port of the inner furnace wall 9, the ceramic protection pipe 2 is fixedly installed on the inner wall of one end of the fixed pipe 4 through the fixed sealing glue 3, and the odd core sealing glue 6 and the sealing filler 7 are arranged at the other end of the odd core 1, in the temperature measuring process, even if the sealing between the ceramic protection pipe and the fixed pipe fails, there is still a sealing structure between the odd core and the fixed pipe, so that the leaked medium is prevented from being sprayed along the thermocouple after the sealing fails, damage to the detection equipment is avoided, the service life of the thermocouple is prolonged, the replacement frequency of the thermocouple is reduced, and the operation time is saved; the furnace wall temperature measuring thermocouple 13 and the cavity temperature measuring thermocouple 14 are also arranged, the outer wall of the inner furnace wall 9 and the cavity temperature can be measured, even if the temperature measurement of the thermocouple assembly 28 is damaged or inaccurate, whether the temperature of the high-temperature and high-pressure furnace is normal can be judged through the furnace wall temperature measuring thermocouple 13 and the cavity temperature measuring thermocouple 14, and the thermocouple assembly 28 does not need to be frequently replaced.

[0037] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in other forms, and any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiments without departing from the technical solution of the present application, and in accordance with the technical essence of the present application, still belong to the protection scope of the technical solution of the present application.

Claims

1. A thermocouple assembly characterized by: The application relates to a thermocouple assembly, which comprises a double core (1), a ceramic protective tube (2) and a fixing tube (4), the ceramic protective tube (2) is sleeved on the outside of the double core (1), the double core (1) and one end of the ceramic protective tube (2) extend out of the fixing tube (4), a sealing structure is arranged between the other end of the double core (1) and the fixing tube (4), and the other end of the ceramic protective tube (2) is sealingly connected with the fixing tube (4).

2. A thermocouple assembly according to claim 1, wherein: The other end of the double core (1) and the ceramic protective tube (2) is arranged in the fixing tube (4), a sealing protrusion (33) is arranged on the inner side of the fixing tube (4), the ceramic protective tube (2) is arranged on one side of the sealing protrusion (33), the other end of the double core (1) passes through the middle of the sealing protrusion (33), and the sealing structure is arranged on the other side of the sealing protrusion (33).

3. A thermocouple assembly according to claim 1, wherein: The sealing structure comprises sealing filler (7), which is arranged between the double core (1) and the fixing tube (4), and the sealing filler (7) is tightly pressed on the sealing protrusion (33) by an inner pressure nut (8).

4. A thermocouple assembly according to claim 3, wherein: The sealing structure further comprises double core sealing glue (6), which is arranged in the other end of the double core (1).

5. A thermocouple assembly according to claim 1, wherein: The outer wall of the ceramic protective tube (2) is fixedly installed on the inner wall of one end of the fixing tube (4) through fixing sealing glue (3).

6. A mounting structure of a thermocouple assembly characterized by comprising: The application further relates to a thermocouple assembly (28) as claimed in any one of claims 1 to 5, a mounting tube (12) and an end sealing assembly, one end of the thermocouple assembly (28) is fixedly installed on the inner furnace wall (9), the double core (1) and one end of the ceramic protective tube (2) pass through the inner furnace wall (9), the other end of the thermocouple assembly (28) is connected to one end of the mounting tube (12), and the end sealing assembly is arranged on the other end of the mounting tube (12).

7. A mounting structure for a thermocouple assembly according to claim 6, wherein: The end sealing assembly comprises a sealing cylinder (18), a sealing plug (20) and a pressing column (21), one end of the sealing cylinder (18) is fixedly connected to the other end of the mounting tube (12), the inner diameter of the end of the sealing cylinder (18) away from the thermocouple assembly (28) is larger than that of the other end, the pressing column (21) is arranged in the end of the sealing cylinder (18) with the larger inner diameter, and the sealing plug (20) is tightly pressed in the sealing cylinder (18) by the pressing column (21).

8. A mounting structure for a thermocouple assembly according to claim 7, wherein: A pressing nut (22) is arranged on the other end of the sealing cylinder (18), the pressing nut (22) is threadedly connected to the outer wall of the other end of the sealing cylinder (18), and the pressing nut (22) tightly presses the pressing column (21).

9. The mounting structure for a thermocouple assembly according to claim 6, wherein: The application further relates to a furnace wall temperature measuring thermocouple (13) and a cavity temperature measuring thermocouple (14), the temperature measuring end of the furnace wall temperature measuring thermocouple (13) abuts against the outer wall of the inner furnace wall (9), the temperature measuring end of the cavity temperature measuring thermocouple (14) is arranged in a cavity outside the inner furnace wall (9), and the furnace wall temperature measuring thermocouple (13), the cavity temperature measuring thermocouple (14) and the mounting tube (12) are fixedly connected through a connecting assembly.

10. A mounting structure for a thermocouple assembly according to claim 9, wherein: The connecting component is a connecting block (15), a mounting pipe mounting hole (23) is formed in the middle of the connecting block (15), the mounting pipe (12) is arranged through the mounting pipe mounting hole (23), two side holes (24) are formed on both sides of the mounting pipe mounting hole (23), the furnace wall temperature measuring thermocouple (13) and the cavity temperature measuring thermocouple (14) are respectively arranged through one side hole (24), threaded holes are formed on one side of the mounting pipe mounting hole (23) and the side hole (24), and the furnace wall temperature measuring thermocouple (13), the cavity temperature measuring thermocouple (14) and the mounting pipe (12) are all fixed through fixing bolts (16).

Images