CN219223971U

CN219223971U - Multi-junction-box thermocouple supporting structure capable of independently replacing core body

Info

Publication number: CN219223971U
Application number: CN202122357790.7U
Authority: CN
Inventors: 刘瀚孺; 刘书良
Original assignee: Tianjin Zhonghuan Temperature Instrument Co ltd
Current assignee: Tianjin Zhonghuan Temperature Instrument Co ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2023-06-20
Anticipated expiration: 2031-09-27

Abstract

The utility model provides a multi-junction-box thermocouple supporting structure capable of independently replacing cores, which comprises a reducing protection pipe, a reducing protection pipe cap and a junction box group, wherein the reducing protection pipe cap is arranged at the head end of the reducing protection pipe, a through hole penetrating through the reducing protection pipe cap is formed in the reducing protection pipe cap, a temperature measuring core extends into the reducing protection pipe from the tail end of the reducing protection pipe and finally extends out of the reducing protection pipe from the through hole, a junction box fixing plate is arranged at the outer side of the junction box in the junction box group, and the junction box in the junction box group is arranged on the reducing protection pipe cap through the junction box fixing plate. The temperature measuring core body and the junction box are installed in one-to-one correspondence, and even if one temperature measuring core body or the junction box is problematic in the long-term use process, the problem temperature measuring core body and the junction box can be replaced under the condition that the integral use of the thermocouple is not affected, so that the purpose that the normal temperature measuring work of the thermocouple is not affected is achieved.

Description

Multi-junction-box thermocouple supporting structure capable of independently replacing core body

Technical Field

The utility model relates to the technical field of thermocouples, in particular to a multi-junction box thermocouple supporting structure with independently replaceable cores.

Background

Thermocouples are commonly used temperature measuring instruments, and are often used in various occasions or reaction devices requiring temperature control, such as chemical reaction kettles, sintering furnaces and the like. The existing thermocouple mainly comprises three parts of a junction box, a protective sleeve and a temperature measuring core body, and because the thermocouple is in the process of actual use, the temperature measuring core body can independently detect the temperature at different positions in a device to be measured, temperature signals measured by all the temperature measuring core bodies are transmitted to a temperature display through the junction box after being transmitted to the temperature display through all the temperature measuring core bodies, the junction box or the temperature measuring core body is in a problem in the existing thermocouple matching installation, and when the junction box and the temperature measuring core body are required to be replaced, the junction box or the temperature measuring core body needs to be integrally detached, and then the thermocouple is in an unusable state during maintenance, so that the temperature measuring work of the device to be measured is affected.

Disclosure of Invention

The utility model overcomes the defects in the prior art, the existing thermocouple is only provided with one junction box, the temperature measurement work of the thermocouple is influenced when the junction box is in problem and needs to be replaced, and the thermocouple supporting structure with multiple junction boxes is provided, and aims to install the temperature measurement cores in one-to-one correspondence with the junction boxes.

The aim of the utility model is achieved by the following technical scheme.

The utility model provides a but many terminal boxes thermocouple supporting structure of independent change core, includes reducing protection tube, reducing protection tube cap and terminal box group the head end outer wall of reducing protection tube forms a reducing tube flange neck form the external screw thread on the outer wall of reducing tube flange neck, reducing protection tube cap pass through the screw thread with the head end of reducing protection tube links to each other set up on the reducing protection tube cap run through the through-hole of reducing protection tube cap to the temperature measurement core stretches out from the through-hole in order to link to each other with the terminal box, the inner wall of through-hole with utilize seal assembly to seal between the external diameter of temperature measurement core be provided with the terminal box fixed plate on the terminal box of terminal box group, utilize the terminal box fixed plate will the terminal box is installed on the reducing protection tube cap.

The head end of the temperature measuring core body penetrates through the through hole and then is connected with the head end of the cold end, a clamping sleeve bolt is further arranged between the cold end and the through hole and between the temperature measuring core bodies, and a lead wire extending from the tail end of the cold end is connected with the junction box through a sealing joint.

And a stainless steel flexible pipe with a polyethylene sheath is coated outside the lead and is used for protecting the lead.

The sealing assembly comprises a sealing pad and a hard pad, wherein the sealing pad and the hard pad are sequentially arranged between the inner wall of the through hole and the outer diameter of the temperature measuring core body from inside to outside.

The number of the junction boxes in the junction box group is the same as the number of the through holes and the number of the temperature measuring cores, and the number of the junction boxes in the junction box group is more than or equal to 2.

The tail end of the reducing protection pipe is connected with the head end of the mounting flange.

The reducing protection tube adopts a tubular structure with a small tail end and a large head end.

The thermocouple with the multi-junction box thermocouple supporting structure is characterized in that a temperature measuring core body is arranged in a sleeve, the tail end of the temperature measuring core body stretches into different positions in the sleeve, the head end of the temperature measuring core body stretches into a reducing protection pipe, the head end of each temperature measuring core body stretches out of a through hole formed in a reducing protection pipe cap of the head end of the reducing protection pipe and then is connected with the head ends of a clamping sleeve bolt and a cold end, and a lead wire stretching out of the tail end of the cold end is connected with the junction box after passing through a sealing joint.

The beneficial effects of the utility model are as follows: the structure that a plurality of temperature measurement cores and same terminal box link to each other is changed into a terminal box and a temperature measurement core link to install the terminal box on reducing protection cap, when the maintenance, avoided wholly to stop the problem of thermocouple, only need wholly take out the terminal box and the temperature measurement core that go wrong from reducing protection cap, reducing protection tube and sleeve pipe in whole after, reuse detection device detects its specific problem, the temperature measurement core of thermocouple other temperature measurement positions department still normally carries out the temperature measurement work in the testing process, the temperature measurement core that maintains stretches into the intraductal corresponding temperature measurement position of cover again through the through-hole on the reducing protection cap, and install the terminal box that maintains again on the reducing protection cap can.

Drawings

FIG. 1 is a schematic side cross-sectional view of the present utility model;

FIG. 2 is a schematic view of the A-direction structure of FIG. 1;

in the figure: 1 is a reducing protection pipe, 2 is a reducing protection pipe cap, 3 is a junction box, 4 is a reducing pipe flange neck, 5 is a temperature measuring core, 6 is a junction box fixing plate, 7 is a cold end, 8 is a clamping sleeve bolt, 9 is a lead wire, 10 is a sealing joint, 11 is a sealing gasket, 12 is a hard gasket, 13 is a mounting flange, 14 is a sleeve, and 15 is a flexible pipe.

Other relevant drawings may be made by those of ordinary skill in the art from the above figures without undue burden.

Detailed Description

The technical scheme of the utility model is further described by specific examples.

The left side of the diameter-variable protection tube 1 in fig. 1 is defined as the head end of the diameter-variable protection tube 1, and the right side of the diameter-variable protection tube 1 in fig. 1 is defined as the tail end of the diameter-variable protection tube 1.

As shown in FIG. 1, the multi-junction-box thermocouple supporting structure capable of independently replacing cores comprises a reducing protection pipe 1, a reducing protection pipe cap 2 and a junction box group, wherein a reducing pipe flange neck 4 is formed on the outer wall of the head end of the reducing protection pipe 1, external threads are formed on the outer wall of the reducing pipe flange neck 4, the reducing protection pipe cap 2 is connected with the head end of the reducing protection pipe 1 through threads, a through hole penetrating through the reducing protection pipe cap 2 is formed in the reducing protection pipe cap 2, so that a temperature measuring core 5 extends out of the through hole and is connected with a junction box, a sealing assembly is used for sealing between the inner wall of the through hole and the outer diameter of the temperature measuring core 5, a junction box fixing plate 6 is arranged on the junction box 3 of the junction box group, and the junction box 3 is installed on the reducing protection pipe cap 2 through the junction box fixing plate 6.

The head end of the temperature measuring core body 5 passes through the through hole and then is connected with the head end of the cold end 7, a clamping sleeve bolt 8 is further arranged between the cold end 7 and the temperature measuring core body 5 between the through holes, and a lead 9 extending from the tail end of the cold end 7 is connected with the junction box 3 through a sealing joint 10.

The lead 9 is covered with a stainless steel flexible pipe 15 with polyethylene sheath for protecting the lead 9.

The sealing assembly comprises a sealing gasket 11 and a hard gasket 12, wherein the sealing gasket 11 and the hard gasket 12 are sequentially arranged between the inner wall of the through hole and the outer diameter of the temperature measuring core body 5 from inside to outside.

The number of the junction boxes 3 in the junction box group is the same as the number of the through holes and the number of the temperature measuring cores, and the number of the junction boxes 3 in the junction box group is more than or equal to 2.

The diameter-variable protection tube 1 adopts a tubular structure with an open tail end and a large head end, or a tubular structure with a basically consistent tail end and head end, namely, the tube diameter of the diameter-variable protection tube is obviously changed or basically kept consistent from the tail end to the head end, the outer diameter of the diameter-variable protection tube is basically kept consistent, and the inner diameter of the diameter-variable protection tube is obviously changed.

The left side of the temperature measuring core 5 in fig. 1 is defined as the head end of the temperature measuring core 5, the right side of the temperature measuring core 5 in fig. 1 is defined as the tail end of the temperature measuring core 5, the left side of the mounting flange 13 in fig. 1 is defined as the head end of the mounting flange 13, the right side of the mounting flange 13 in fig. 1 is defined as the tail end of the mounting flange 13, the left side of the sleeve 14 in fig. 1 is defined as the head end of the sleeve 14, and the right side of the sleeve 14 in fig. 1 is defined as the tail end of the sleeve 14.

The thermocouple with the multi-junction-box thermocouple supporting structure capable of independently replacing cores is utilized, a temperature measuring core body 5 is arranged in a sleeve 14, the tail ends of the temperature measuring core bodies 5 extend into different positions in the sleeve 14, the head ends of the temperature measuring core bodies 5 extend into the reducing protection pipe 1, the head ends of each temperature measuring core body 5 extend out of through holes formed in the reducing protection pipe caps 2 of the head ends of the reducing protection pipe 1 and then are connected with the head ends of the clamping sleeve bolts 8 and the cold ends 7, and a lead 9 extending out of the tail ends of the cold ends 7 is connected with the junction box 3 after passing through a sealing joint 10.

The tail end of the reducing protection tube 1 is connected with the head end of the mounting flange 13 so as to be convenient for installing the thermocouple on the device to be measured, and the head end of the sleeve 14 is connected with the tail end of the mounting flange 13.

In the using process, if one temperature measuring core body 5 or the junction box 3 has a problem, after the junction box 3 on the side with the problem is taken down from the diameter-changing protection pipe cap 2, the sealing joint 10, the lead 9, the cold end 7, the clamping sleeve bolt 8 and the temperature measuring core body 5 which are connected with the junction box 3 are taken out from the sleeve 14 together, then the junction box 3 and the temperature measuring core body 5 are respectively subjected to problem detection by utilizing the detection device, whether the junction box 3 or the temperature measuring core body 5 has a problem is found, then the junction box 3 or the temperature measuring core body 5 with the problem is replaced, after the replacement is completed, the repaired temperature measuring core body 5 is stretched into the corresponding temperature measuring position in the sleeve 14 through the through hole on the diameter-changing protection pipe cap 2, and then the junction box 3 is installed on the diameter-changing protection pipe cap 2 again, so that one repair work is completed.

The cold end is formed by a stainless steel protection tube, magnesium oxide insulating powder and thermocouple wires, the structure of the cold end is basically the same as that of the armored thermocouple, the only difference between the cold end and the armored thermocouple is that the diameter of the cold end is larger than that of the armored thermocouple, the thermocouple wires extend out of the head end of the armored thermocouple and extend into the cold end and are connected with the thermocouple wires in the cold end, the thermocouple wires are thin, the problem of fracture easily occurs, the cold end can be used for protecting the thermocouple wires, the electric potential of the thermocouple is related to the temperatures at the two ends of the electric potential of the thermocouple wires, the temperature-thermoelectric potential relation curve is divided under the condition that the temperature of the cold end is 0 ℃, the temperature of the cold end can be influenced by the external environment due to the fact that the cold end of the thermocouple is exposed to the air, the temperature of the cold end can not be kept at 0 ℃, the same, the temperature of the cold end can not be kept at a fixed temperature, if the temperature of the cold end is freely changed, the measurement accuracy can be influenced, therefore, the temperature compensation is needed for the cold end, the measurement error can be easily occur, finally, the stainless steel protection tube of the cold end is internally is packaged with the magnesium oxide insulating powder and the magnesium oxide insulating powder, the electric potential of the thermocouple wires can be prevented from the explosion by the electric potential of the thermocouple wires, the temperature protection device can be sealed by the electric potential of the thermocouple wires, and the temperature protection device, the temperature can be prevented from the explosion, and the temperature protection device.

Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature's illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "under" other elements or features would then be oriented "over" the other elements or features. Thus, the exemplary term "lower" may encompass both an upper and lower orientation. The device may be otherwise positioned (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Moreover, relational terms such as "first" and "second", and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.

The foregoing detailed description of the utility model has been presented for purposes of illustration and description, but is not intended to limit the scope of the utility model. All equivalent changes and modifications within the scope of the present utility model are intended to be covered by the present utility model.

Claims

1. Can independently change many terminal boxes thermocouple support structures of core, its characterized in that: including reducing protection pipe, reducing protection pipe cap and terminal box group the head end installation of reducing protection pipe the reducing protection pipe cap is last to be seted up and runs through the through-hole of reducing protection pipe cap is seted up, and the temperature measurement core stretches into from the tail end of reducing protection pipe in the reducing protection pipe and finally stretches out outside the reducing protection pipe from the through-hole, the outside of terminal box in the terminal box group is provided with the terminal box fixed plate, through the terminal box fixed plate will terminal box in the terminal box group is installed on the reducing protection pipe cap.

2. The multi-junction box thermocouple support structure with independently replaceable cores according to claim 1, wherein: and a sealing assembly is arranged between the inner wall of the through hole and the outer diameter of the temperature measuring core body, the sealing assembly comprises a sealing pad and a hard pad, and the sealing pad and the hard pad are sequentially arranged between the inner wall of the through hole and the outer diameter of the temperature measuring core body from inside to outside.

3. Thermocouple utilizing the multi-junction box thermocouple support structure with independently replaceable cores according to claim 1 or 2, characterized in that: the temperature measuring core body stretches into the reducing protection pipe from the tail end opening of the reducing protection pipe, stretches out through the through hole on the reducing protection pipe cap and is connected with the corresponding junction box.

4. A thermocouple as in claim 3 wherein: the temperature measuring core body stretches out of the reducing protection pipe from the through hole and is connected with a junction box arranged on the reducing protection pipe cap through a lead.

5. A thermocouple as in claim 3 wherein: the temperature measuring core body stretches out of the reducing protection pipe from the through hole and is connected with the clamping sleeve bolt and then connected with the junction box arranged on the reducing protection pipe cap through the lead.

6. A thermocouple as in claim 3 wherein: the temperature measuring core body stretches out of the reducing protection pipe from the through hole and is connected with the clamping sleeve bolt and the cold end in sequence and then is connected with a junction box arranged on the reducing protection pipe cap through a lead.

7. A thermocouple according to any of claims 4 to 6, characterised in that: the lead wire is connected with a junction box arranged on the reducing protection pipe cap through a sealing joint.

8. A thermocouple according to any of claims 4 to 6, characterised in that: and a stainless steel flexible pipe with a polyethylene sheath is coated outside the lead and is used for protecting the lead.

9. The thermocouple of claim 7, wherein: and a stainless steel flexible pipe with a polyethylene sheath is coated outside the lead and is used for protecting the lead.

10. A thermocouple as in claim 3 wherein: the tail end of the reducing protection tube is connected with the head end of the mounting flange so as to facilitate the thermocouple to be mounted on the device to be measured.

11. The thermocouple of claim 10, wherein: and a sleeve is arranged on the outer side of the temperature measuring core body and used for protecting the temperature measuring core body, and the head end of the sleeve is connected with the tail end of the mounting flange.

12. A thermocouple according to any of claims 4 to 6, characterised in that: the tail end of the reducing protection tube is connected with the head end of the mounting flange so as to facilitate the thermocouple to be mounted on the device to be measured.

13. The thermocouple of claim 12, wherein: and a sleeve is arranged on the outer side of the temperature measuring core body and used for protecting the temperature measuring core body, and the head end of the sleeve is connected with the tail end of the mounting flange.

14. The thermocouple of claim 7, wherein: the tail end of the reducing protection tube is connected with the head end of the mounting flange so as to facilitate the thermocouple to be mounted on the device to be measured.

15. The thermocouple of claim 14, wherein: and a sleeve is arranged on the outer side of the temperature measuring core body and used for protecting the temperature measuring core body, and the head end of the sleeve is connected with the tail end of the mounting flange.

16. The thermocouple of claim 8, wherein: the tail end of the reducing protection tube is connected with the head end of the mounting flange so as to facilitate the thermocouple to be mounted on the device to be measured.

17. The thermocouple of claim 16, wherein: and a sleeve is arranged on the outer side of the temperature measuring core body and used for protecting the temperature measuring core body, and the head end of the sleeve is connected with the tail end of the mounting flange.