CN220206871U

CN220206871U - Thermocouple protective sleeve

Info

Publication number: CN220206871U
Application number: CN202321712292.2U
Authority: CN
Inventors: 朱承忠; 朱忠智; 王�琦
Original assignee: Wuhan Chunhui Instrument Cable Co ltd
Current assignee: Wuhan Chunhui Instrument Cable Co ltd
Priority date: 2023-06-30
Filing date: 2023-06-30
Publication date: 2023-12-19
Anticipated expiration: 2033-06-30

Abstract

The utility model relates to the technical field of thermocouples, in particular to a thermocouple protective sleeve, which comprises a thermocouple body and an inner sleeve arranged at one end of the thermocouple body, wherein a fixing nut is fixedly connected to the top of the inner sleeve, ash cleaning holes distributed in a circular shape at equal distance are formed in the circumferential outer wall of the inner sleeve, a connecting pipe is fixedly connected to the circumferential outer wall of the inner sleeve, an internal thread is formed in the circumferential inner wall of the connecting pipe, and a sealing assembly for sealing the ash cleaning holes is arranged on the circumferential outer wall of the inner sleeve. According to the utility model, after the thermocouple works for a long time, the external purging pipe can be communicated with the connecting pipe, meanwhile, the purging gas can be connected into compressed air or nitrogen according to the process requirements, and when the purging gas enters the inner sleeve, the dust deposit in the purging gas can be blown off, so that the temperature measurement is accurate, and meanwhile, the ash removing holes are arranged outside the inner sleeve in a circular shape at equal intervals, so that the ash removing effect and uniformity are further ensured.

Description

Thermocouple protective sleeve

Technical Field

The utility model relates to the technical field of thermocouples, in particular to a thermocouple protective sleeve.

Background

Thermocouples are commonly used temperature measuring elements in temperature measuring instruments, which directly measure temperature and convert temperature signals into thermoelectromotive signals, which are converted into the temperature of the medium to be measured by an electrical instrument (secondary instrument). The external forms of the thermocouples are very different according to the needs, but the basic structures of the thermocouples are almost the same, and the thermocouples are usually composed of main parts such as a hot electrode, an insulating sleeve protection tube, a junction box and the like, and are usually matched with a display instrument, a recording instrument and an electronic regulator.

The thermocouple has the advantages of stable performance, accuracy, reliability, simple structure, convenient use, wide temperature measurement range, remote signal transmission and the like, and becomes the most widely applied temperature sensing element in the fields of industrial production, scientific research and the like. During the temperature measurement process, the thermocouple protective sleeve plays an important role.

Because the working environment of thermocouple is gone on in industrial furnace mostly, so can receive the erosion of flue gas and smoke and dust at the in-process that the thermocouple used, there is the smoke and dust entering protective sleeve inside for a long time to influence the subsequent temperature measurement of thermocouple, lead to its temperature measurement result to appear certain deviation, can not satisfy people's user demand. Accordingly, there is a need for a thermocouple shield to address the above-described problems.

Disclosure of Invention

Based on the above mentioned deficiencies of the prior art in the background art, the present utility model provides a thermocouple shield therefor.

The utility model adopts the following technical scheme to overcome the technical problems, and specifically comprises the following steps:

the thermocouple protective sleeve comprises a thermocouple body and an inner sleeve arranged at one end of the thermocouple body, wherein a fixing nut is fixedly connected to the top of the inner sleeve, ash removing holes distributed in a circular shape at equal distance are formed in the circumferential outer wall of the inner sleeve, a connecting pipe is fixedly connected to the circumferential outer wall of the inner sleeve, and an internal thread is formed in the circumferential inner wall of the connecting pipe;

the circumference outer wall of the inner sleeve is provided with a sealing component for sealing the ash cleaning hole;

one end of the inner sleeve is provided with a fastening component for ensuring stability of the sealing component.

As a further scheme of the utility model: the circumference inner wall threaded connection of connecting pipe has the screw thread post, the one end fixedly connected with first sealing plug of screw thread post.

As still further aspects of the utility model: the screw thread post is kept away from the one end fixedly connected with limiting plate of first sealing plug, fixedly connected with knob on the outer wall of one side of limiting plate.

As still further aspects of the utility model: the sealing assembly comprises a second sealing plug inserted into the ash removing hole, an outer sheath is fixedly connected to the outer wall of one end of the second sealing plug, and the number of the outer sheaths is two.

As still further aspects of the utility model: second locating columns distributed at equal distances are fixedly connected to the outer wall of one side of the outer sheath, second locating holes distributed at equal distances are formed in one side, away from the second locating columns, of the outer sheath, and the second locating columns are matched with the second locating holes.

As still further aspects of the utility model: the outer wall fixedly connected with of top of oversheath is first reference column, and another the first constant head tank has been seted up at the top of oversheath, first reference column with first constant head tank cooperatees.

As still further aspects of the utility model: the fastening component comprises a positioning cylinder which is connected with the circumferential outer wall of the inner sleeve in a threaded manner;

the positioning cylinder comprises a limiting cylinder and a threaded cylinder, and the specification of the limiting cylinder is larger than that of the threaded cylinder;

the outer wall of the circumference of the inner sleeve is provided with a thread groove, the thread cylinder is meshed with the thread groove, and one end of the outer sheath is positioned in the limiting cylinder.

After adopting the structure, compared with the prior art, the utility model has the following advantages: the external purging pipe can be communicated with the connecting pipe after the thermocouple works for a long time, meanwhile, the purging gas can be connected with compressed air or nitrogen according to the process requirement, and accumulated ash in the purging gas can be blown off after the purging gas enters the inner sleeve, so that the temperature measurement is accurate, and meanwhile, the ash removing holes are arranged outside the inner sleeve in a circular shape at equal intervals, so that the ash removing effect and uniformity are further ensured;

when the thermocouple is used, the connection pipe can be sealed through the threaded connection between the threaded column and the connection pipe, and meanwhile, when the two groups of outer jackets are clamped and fixed on the circumferential outer wall of the inner sleeve, the sealing of the ash cleaning hole can be ensured through the second sealing plug, so that the integral sealing of the inner sleeve is realized, and the situation that a large amount of smoke dust enters in the subsequent use process is avoided;

after the two groups of outer jackets are clamped and fixed, the worker rotates the positioning cylinder to enable the threaded cylinder to be meshed with the threaded groove, so that the two groups of outer jackets can be effectively locked and fixed, and the two groups of outer jackets can be always clung to the circumferential outer wall of the inner sleeve.

Drawings

Fig. 1 is a schematic view of the structure of the inner sleeve of the present utility model after installation.

Fig. 2 is a schematic diagram of the overall structure of the present utility model.

Fig. 3 is an enlarged schematic view of the structure of fig. 1 a according to the present utility model.

Fig. 4 is a schematic diagram of a split structure of the present utility model.

In the figure: 1. a thermocouple body; 2. an inner sleeve; 3. an outer sheath; 4. a positioning cylinder; 401. a limiting cylinder; 402. a thread cylinder; 5. a connecting pipe; 6. a fixing nut; 7. a limiting plate; 8. a knob; 9. a first positioning column; 10. a first positioning groove; 11. a threaded column; 12. a first sealing plug; 13. a second positioning column; 14. a second positioning hole; 15. a second sealing plug; 16. ash removal holes; 17. a thread groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 4, in the embodiment of the utility model, a thermocouple protection sleeve comprises a thermocouple body 1 and an inner sleeve 2 arranged at one end of the thermocouple body 1, wherein a fixing nut 6 is fixedly connected to the top of the inner sleeve 2, ash removing holes 16 distributed in a circular shape at equal distance are formed in the circumferential outer wall of the inner sleeve 2, a connecting pipe 5 is fixedly connected to the circumferential outer wall of the inner sleeve 2, internal threads are formed in the circumferential inner wall of the connecting pipe 5, an external purge pipe can be communicated with the connecting pipe 5 after the thermocouple body 1 works for a long time, and meanwhile, compressed air or nitrogen can be introduced into the purge gas according to technological requirements, when the purge gas enters the inner sleeve 2, accumulated ash in the inner sleeve can be blown off, so that accurate temperature measurement is ensured, and meanwhile, the ash removing holes 16 are arranged on the outer wall of the inner sleeve 2 in a circular shape at equal distance, so that the ash removing effect and uniformity are further ensured;

the circumferential outer wall of the inner sleeve 2 is provided with a sealing component for sealing the ash cleaning hole 16;

one end of the inner sleeve 2 is provided with a fastening assembly for ensuring the stability of the sealing assembly.

Preferably, the circumferential inner wall of the connecting pipe 5 is in threaded connection with a threaded column 11, and one end of the threaded column 11 is fixedly connected with a first sealing plug 12.

Preferably, one end of the threaded column 11 far away from the first sealing plug 12 is fixedly connected with a limiting plate 7, and a knob 8 is fixedly connected to the outer wall of one side of the limiting plate 7.

Preferably, the sealing component comprises a second sealing plug 15 inserted in the ash cleaning hole 16, one end outer wall of the second sealing plug 15 is fixedly connected with an outer sheath 3, the number of the outer sheaths 3 is two, the sealing of the ash cleaning hole 16 can be ensured through the second sealing plug 15, the whole sealing of the inner sleeve 2 is realized, and the situation that a large amount of smoke dust enters in the subsequent use process is avoided.

Preferably, the outer wall of one side of the outer sheath 3 is fixedly connected with second positioning columns 13 which are distributed equidistantly, one side of the outer sheath 3 away from the second positioning columns 13 is provided with second positioning holes 14 which are distributed equidistantly, and the second positioning columns 13 are matched with the second positioning holes 14, so that the stability of the two groups of outer sheaths 3 after being assembled is ensured.

Preferably, the first reference column 9 of top outer wall fixedly connected with of oversheath 3, first constant head tank 10 has been seted up at the top of another oversheath 3, and first reference column 9 cooperatees with first constant head tank 10, can play the effect of direction at the in-process of two sets of oversheaths 3 equipment, makes the staff can cooperate the joint with two sets of oversheaths 3 fast.

Preferably, the fastening assembly comprises a positioning cylinder 4 which is connected with the circumference and the outer wall of the inner sleeve 2 in a threaded manner;

the positioning cylinder 4 comprises a limiting cylinder 401 and a threaded cylinder 402, and the specification of the limiting cylinder 401 is larger than that of the threaded cylinder 402;

the screw thread groove 17 has been seted up to the circumference outer wall of interior sleeve pipe 2, and screw thread section of thick bamboo 402 meshes with screw thread groove 17 mutually, and the one end of oversheath 3 is located the inside of spacing section of thick bamboo 401, and the staff rotates the positioning tube 4 after two sets of oversheath 3 joint are fixed to be accomplished, makes screw thread section of thick bamboo 402 mesh with screw thread groove 17 mutually to can carry out effectual locking to two sets of oversheaths 3 and fix, make two sets of oversheaths 3 can hug closely the circumference outer wall of interior sleeve pipe 2 all the time.

Working principle: can be linked together external purge pipe and connecting pipe 5 after thermocouple body 1 works for a long time, simultaneously purge gas can insert compressed air or nitrogen gas according to the technological requirement, can blow off its inside deposition after purge gas gets into interior sleeve pipe 2 inside, guarantee that the temperature measurement is accurate, the ash removal hole 16 equidistance is circular setting at the outer wall of interior sleeve pipe 2 simultaneously, consequently further guaranteed the effect and the homogeneity of deashing, can realize the sealing of connecting pipe 5 through threaded connection between screw post 11 and connecting pipe 5 when thermocouple deashing is accomplished in use, simultaneously when two sets of oversheath 3 joint are fixed on the circumference outer wall of interior sleeve pipe 2, can guarantee the sealing to ash removal hole 16 through second sealing plug 15, realize interior sleeve pipe 2 holistic sealing, avoid appearing the condition that the smoke and dust is in a large amount of entering in the in-process of follow-up use, staff rotates positioning cylinder 4 after two sets of oversheath 3 joint is fixed, make screw thread cylinder 402 mesh with screw groove 17, thereby can carry out effective locking fixedly to two sets of oversheath 3, make two sets of oversheath 3 can hug closely the circumference of interior sleeve pipe 2 all the time.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

Claims

1. The thermocouple protective sleeve comprises a thermocouple body (1) and an inner sleeve (2) arranged at one end of the thermocouple body (1), and is characterized in that a fixing nut (6) is fixedly connected to the top of the inner sleeve (2), ash cleaning holes (16) distributed in a circular shape at equal intervals are formed in the circumferential outer wall of the inner sleeve (2), a connecting pipe (5) is fixedly connected to the circumferential outer wall of the inner sleeve (2), and internal threads are formed in the circumferential inner wall of the connecting pipe (5);

the circumference outer wall of the inner sleeve (2) is provided with a sealing component for sealing the ash cleaning hole (16);

one end of the inner sleeve (2) is provided with a fastening assembly for ensuring the stability of the sealing assembly.

2. Thermocouple protecting sleeve according to claim 1, characterized in that the circumferential inner wall of the connecting tube (5) is screwed with a threaded column (11), and one end of the threaded column (11) is fixedly connected with a first sealing plug (12).

3. A thermocouple protecting sleeve according to claim 2, characterized in that one end of the threaded column (11) far away from the first sealing plug (12) is fixedly connected with a limiting plate (7), and a knob (8) is fixedly connected to the outer wall of one side of the limiting plate (7).

4. Thermocouple protection sleeve according to claim 1, characterized in that the sealing assembly comprises a second sealing plug (15) inserted into the ash cleaning hole (16), an outer jacket (3) is fixedly connected to the outer wall of one end of the second sealing plug (15), and the number of the outer jackets (3) is two.

5. The thermocouple protective sleeve according to claim 4, wherein second positioning columns (13) distributed at equal distances are fixedly connected to the outer wall of one side of the outer sheath (3), second positioning holes (14) distributed at equal distances are formed in one side, away from the second positioning columns (13), of the outer sheath (3), and the second positioning columns (13) are matched with the second positioning holes (14).

6. The thermocouple protecting sleeve according to claim 5, wherein a first positioning column (9) is fixedly connected to the outer wall of the top of the outer sheath (3), a first positioning groove (10) is formed in the top of the other outer sheath (3), and the first positioning column (9) is matched with the first positioning groove (10).

7. A thermocouple protection sleeve according to claim 6, characterized in that said fastening assembly comprises a positioning cylinder (4) screwed on the circumferential outer wall of said inner sleeve (2);

the positioning cylinder (4) comprises a limiting cylinder (401) and a threaded cylinder (402), and the specification of the limiting cylinder (401) is larger than that of the threaded cylinder (402);

a thread groove (17) is formed in the circumferential outer wall of the inner sleeve (2), the thread cylinder (402) is meshed with the thread groove (17), and one end of the outer sheath (3) is located in the limiting cylinder (401).