Temperature sensor

Abstract

The utility model discloses a temperature sensor, comprising a temperature measuring mechanism and a protection mechanism, the temperature measuring mechanism comprises a junction box and a plurality of thermocouples, the junction box is internally provided with a plurality of binding posts, and the plurality of thermocouples are respectively connected to the plurality of binding posts through a plurality of leads; the protection mechanism comprises a plurality of protection tubes, the plurality of protection tubes are respectively sleeved on the plurality of wires and the thermocouples, and the end portions of the protection tubes are connected to the junction box. The utility model has the beneficial effects that the plurality of thermocouples are respectively and independently connected to the binding posts in the junction box through the plurality of wires, each thermocouple is equipped with an independent protection tube, and the protection tubes are arranged in the junction box. Each thermocouple works independently, and when the thermocouple is damaged, only the damaged thermocouple needs to be replaced, so that the production cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of gas turbine power generation, in particular to a temperature sensor. Background Art

[0002] In the gas turbine power generation industry, armored thermocouples are usually used as temperature measurement sensors. They are usually used in conjunction with temperature transmitters, regulators and display instruments to form a process control system to directly measure or control the temperature of fluids, steam and gases in the range of 0-1800℃ and solid surfaces in various production processes.

[0003] In the related art, an integral multi-point armored thermocouple is proposed, including a junction box, a flange, multiple temperature sensing elements, a measuring protection tube and an upper protection tube. The upper protection tube and the measuring protection tube are connected together by a flange, a locking nut and a nut. The multiple temperature sensing elements are arranged in the measuring protection tube, and the measuring protection tube is processed into a slender and bendable combination.

[0004] The above-mentioned related technologies have the following defects: multiple temperature sensing elements are arranged in a measuring protection tube and fixed by a flange. When any temperature sensing element is damaged, it needs to be disassembled and replaced as a whole, which delays production efficiency and increases production costs. Utility Model Content

[0005] The purpose of the utility model is to overcome the above technical deficiencies and provide a temperature sensor to solve the technical problem in the prior art that thermocouples can only be installed and replaced as a whole.

[0006] In order to achieve the above technical purpose, the technical solution of the utility model provides a temperature sensor, including a temperature measuring mechanism, the temperature measuring mechanism includes a junction box and a plurality of thermocouples, the junction box is provided with a plurality of terminals, the plurality of thermocouples are respectively connected to the plurality of terminals through a plurality of wires; and,

[0007] The protection mechanism comprises a plurality of protection tubes, the plurality of protection tubes are respectively sleeved on a plurality of wires and thermocouples, and the ends of the protection tubes are connected to a junction box.

[0008] In some embodiments, the protection tube includes a wire protection tube sleeved on the wire and a thermocouple protection tube sleeved on the thermocouple, and the end of the wire protection tube is connected to the junction box.

[0009] In some embodiments, the wire protection tube includes a first tube body and a second tube body slidably connected to the first tube body along the length direction of the first tube body, the end of the first tube body is connected to the junction box, and the first tube body is provided with a locking assembly for locking the second tube body.

[0010] In some embodiments, the locking assembly includes an insertion rod passing through a first tube body, the first tube body is provided with an insertion hole for the insertion rod to pass through, and the second tube body is provided with a plurality of slots for accommodating the insertion rod at intervals along a sliding direction of the second tube body.

[0011] In some embodiments, a spring is sleeved on the insertion rod, one end of the spring is connected to the insertion rod, and the other end of the spring is connected to the first tube body. The spring is in a stretched state, and the spring causes the insertion rod to tend to slide toward the second tube body.

[0012] In some embodiments, the end of the insertion rod close to the second tube is spherical.

[0013] In some embodiments, a first flange is disposed at the end of the second tube body, a second flange is disposed at the end of the thermocouple protection tube, and the first flange and the second flange are connected together by bolts and nuts.

[0014] In some embodiments, the end of the second tube body is threadedly connected to the first flange, and the thermocouple protection tube is threadedly connected to the second flange.

[0015] In some embodiments, a plurality of protruding rings are provided on a side of the first flange close to the second flange, and the plurality of protruding rings are arranged in sequence along the radial direction of the first flange; a plurality of grooves for accommodating the protruding rings are provided on a side of the second flange close to the first flange, and the plurality of grooves are arranged in sequence along the radial direction of the second flange.

[0016] In some embodiments, an elastic layer is provided on a side of the first flange close to the second flange.

[0017] Compared with the prior art, the beneficial effects of the utility model include: multiple thermocouples are independently connected to the terminal posts in the junction box through multiple wires, each thermocouple is equipped with an independent protective tube, each thermocouple works independently, and when a thermocouple is damaged, only the damaged thermocouple needs to be replaced, which reduces production costs and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a sectional view of the overall structure of the alarm device provided by the utility model;

[0019] Figure 2 It is a sectional view of the overall structure of the protection mechanism provided by the utility model.

[0020] Description of reference numerals:

[0021] 1. Temperature measuring mechanism; 11. Junction box; 12. Thermocouple; 13. Terminal post; 14. Wire; 2. Protection mechanism; 21. Protection tube; 22. Wire protection tube; 23. Thermocouple protection tube; 24. First tube body; 25. Second tube body; 3. Locking assembly; 31. Insert rod; 32. Socket; 33. Slot; 34. Spring; 4. First flange; 41. Second flange; 42. Bolt; 43. Nut; 44. Through hole; 45. Protruding ring; 46. Groove; 47. Elastic layer. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] The utility model provides a temperature sensor, the structure of which is as follows Figure 1 - Figure 2 As shown, it includes a temperature measuring mechanism 1 and a protection mechanism 2.

[0024] The temperature measuring mechanism 1 includes a junction box 11 and a plurality of thermocouples 12 . A plurality of connecting posts 13 are installed in the junction box 11 at intervals along the width direction of the junction box 11 . The plurality of thermocouples 12 are respectively connected to the plurality of connecting posts 13 through a plurality of wires 14 .

[0025] The protection mechanism 2 includes a plurality of protection tubes 21 , which are coaxially sleeved on a plurality of wires 14 and thermocouples 12 , respectively. The top ends of the protection tubes 21 are connected to the bottom of the junction box 11 .

[0026] When in use, multiple thermocouples 12 are independently connected to the terminal posts 13 in the junction box 11 through multiple wires 14. Each thermocouple 12 is equipped with an independent protection tube 21 to protect the wire 14 and the thermocouple 12. Each thermocouple 12 works independently. When the thermocouple 12 is damaged, it is only necessary to remove the protection tube 21 and replace the damaged thermocouple 12, thereby reducing production costs and improving production efficiency.

[0027] In the utility model, a plurality of thermocouples 12 are independently connected to the terminal posts 13 in the junction box 11 through a plurality of wires 14, each thermocouple 12 is equipped with an independent protective tube 21, and each thermocouple 12 works independently. When a thermocouple 12 is damaged, only the damaged thermocouple 12 needs to be replaced, thereby reducing production costs and improving production efficiency.

[0028] To protect the wire 14 and the thermocouple 12 separately, refer to Figure 1In a preferred embodiment, the protection tube 21 includes a wire 14 protection tube 21 coaxially sleeved on the wire 14 and a thermocouple 12 protection tube 21 coaxially sleeved on the thermocouple 12 , and the end of the wire 14 protection tube 21 is connected to the junction box 11 .

[0029] When in use, the wire 14 is located at normal room temperature, while the thermocouple 12 is located in a high temperature, high pressure or corrosive fluid environment. Therefore, the materials required for the wire 14 protection tube 21 and the thermocouple 12 protection tube 21 are also different, and they are separately equipped to reduce production costs.

[0030] To adjust the length of the wire 14 protection tube 21, please refer to Figure 1 In a preferred embodiment, the wire 14 protection tube 21 includes a first tube body 24 and a second tube body 25 slidably connected to the first tube body 24 along the length direction of the first tube body 24, the end of the first tube body 24 is connected to the junction box 11, and the first tube body 24 is provided with a locking assembly 3 for locking the second tube body 25.

[0031] When in use, the length of the wire 14 protection tube 21 can be adjusted according to the distance between the junction box 11 and the thermocouple 12. It has a wide range of applications and strong practicality. When adjusting the length of the wire 14 protection tube 21, push the second tube body 25 to slide along the length direction of the first tube body 24. After pushing the second tube body 25 to a predetermined position, use the locking assembly 3 to lock the second tube body 25.

[0032] In order to fix the second tube 25 on the first tube 24, please refer to Figure 2 In a preferred embodiment, the locking assembly 3 includes an insertion rod 31 slidably penetrated on the side wall of the first tube body 24, the insertion rod 31 is located at the bottom end of the first tube body 24, the insertion rod 31 is perpendicular to the first tube body 24, and the first tube body 24 is provided with a plug hole 32 for the insertion rod 31 to pass through, and the second tube body 25 is provided with a plurality of slots 33 for accommodating the insertion rod 31 at intervals along the sliding direction of the second tube body 25.

[0033] When in use, after the insertion rod 31 is slid to a predetermined position, the insertion hole 32 is aligned with one of the slots 33, and the insertion rod 31 is slid into the insertion hole 32 and the corresponding slot 33, and the second tube body 25 is fixed, which is convenient to operate and firmly fixed.

[0034] In order to improve the stability of the insertion rod 31, please refer to Figure 2 In a preferred embodiment, a spring 34 is sleeved on the insertion rod 31, one end of the spring 34 is fixedly connected to the insertion rod 31, and the other end of the spring 34 is fixedly connected to the first tube body 24. The spring 34 is in a stretched state, and the spring 34 causes the insertion rod 31 to have a tendency to slide toward the second tube body 25.

[0035] During use, on the one hand, when the socket 32 ​​is aligned with one of the slots 33, under the action of the restoring force of the spring 34, the insertion rod 31 automatically rebounds to the socket 32 ​​and the corresponding slot 33, making the operation more convenient; on the other hand, under the action of the restoring force of the spring 34, the insertion rod 31 is not easy to loosen from the socket 32, and the fixation is more stable.

[0036] In order to make the insertion rod 31 easier to slide into the insertion hole 32, please refer to Figure 2 In a preferred embodiment, the end of the insertion rod 31 close to the second tube body 25 is spherical.

[0037] When in use, when the insertion rod 31 slides into the insertion hole 32 , it plays a guiding role, making it easier for the insertion rod 31 to slide into the insertion hole 32 .

[0038] To facilitate the installation and removal of the first flange 4 and the second flange 41, please refer to Figure 2 In a preferred embodiment, the bottom end of the second tube body 25 is fixedly connected to the first flange 4, and the top end of the thermocouple 12 protection tube 21 is fixedly connected to the second flange 41. The first flange 4 and the second flange 41 are each provided with a plurality of corresponding through holes 44, and each through hole 44 is slidably penetrated by a bolt 42, and a nut 43 is threadedly connected to the bolt 42.

[0039] When in use, the end faces of the first flange 4 and the second flange 41 are butted together, the multiple bolts 42 are respectively slid into the multiple through holes 44, and then the nuts 43 are tightened to the ends of the bolts 42. The operation is convenient and the fixation is stable.

[0040] In order to facilitate the installation and removal of the second tube body 25 and the thermocouple 12 protection tube 21, please refer to Figure 2 In a preferred embodiment, the end of the second tube body 25 is coaxially threadedly connected to the first flange 4 , and the end of the thermocouple 12 protection tube 21 is coaxially threadedly connected to the second flange 41 .

[0041] When in use, the second tube body 25 and the first flange 4, as well as the thermocouple 12 protection tube 21 and the second flange 41 are connected by threaded connection, which is convenient for assembly and disassembly and stable for fixation.

[0042] In order to improve the airtightness of the connection between the first flange 4 and the second flange 41, please refer to Figure 2 In a preferred embodiment, a plurality of protruding rings 45 are provided on a side of the first flange 4 close to the second flange 41, and the plurality of protruding rings 45 are arranged sequentially along the radial direction of the first flange 4, and a plurality of grooves 46 for accommodating the protruding rings 45 are provided on a side of the second flange 41 close to the first flange 4, and the plurality of grooves 46 are arranged sequentially along the radial direction of the second flange 41.

[0043] When in use, when the end faces of the first flange 4 and the second flange 41 are butted together, the multiple protruding rings 45 respectively enter the multiple grooves 46, thereby increasing the contact area between the first flange 4 and the second flange 41, improving the air tightness of the connection between the second tube body 25 and the thermocouple 12 protection tube 21, reducing the possibility of damage to the wire 14 and the thermocouple 12, and improving the measurement accuracy.

[0044] In order to make the first flange 4 and the second flange 41 fit more closely, please refer to Figure 2 In a preferred embodiment, an elastic layer is fixedly connected to one side of the first flange 4 close to the second flange 41, and the elastic layer is a rubber pad.

[0045] During use, when the first flange 4 and the second flange 41 are in contact with each other, the elastic layer is squeezed and deformed, so that the first flange 4 and the second flange 41 fit more closely, further improving the airtightness of the connection between the second tube body 25 and the thermocouple 12 protection tube 21.

[0046] In order to better understand the present invention, the following Figure 1 - Figure 2 The working principle of the technical solution of a temperature sensor of the utility model is described in detail: a plurality of thermocouples 12 are independently connected to the terminal posts 13 in the junction box 11 through a plurality of wires 14, and each thermocouple 12 is equipped with an independent protection tube 21 to protect the wire 14 and the thermocouple 12. Each thermocouple 12 works independently. When the thermocouple 12 is damaged, it is only necessary to remove the protection tube 21 and replace the damaged thermocouple 12, thereby reducing production costs and improving production efficiency.

[0047] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A temperature sensor, characterized in that: include: A temperature measuring mechanism, the temperature measuring mechanism comprising a junction box and a plurality of thermocouples, the junction box is provided with a plurality of terminals, and the plurality of thermocouples are respectively connected to the plurality of terminals through a plurality of wires; as well as, The protection mechanism comprises a plurality of protection tubes, the plurality of protection tubes are respectively sleeved on a plurality of wires and thermocouples, and the ends of the protection tubes are connected to a junction box.

2. A temperature sensor according to claim 1, characterized in that: The protection tube comprises a wire protection tube sleeved on the wire and a thermocouple protection tube sleeved on the thermocouple, and the end of the wire protection tube is connected to the junction box.

3. A temperature sensor according to claim 2, characterized in that: The wire protection tube comprises a first tube body and a second tube body slidably connected to the first tube body along the length direction of the first tube body, the end of the first tube body is connected to the junction box, and the first tube body is provided with a locking assembly for locking the second tube body.

4. A temperature sensor according to claim 3, characterized in that: The locking assembly comprises an insertion rod penetrating the first tube body, the first tube body is provided with an insertion hole for the insertion rod to pass through, and the second tube body is provided with a plurality of slots for accommodating the insertion rod at intervals along the sliding direction of the second tube body.

5. A temperature sensor according to claim 4, characterized in that: A spring is sleeved on the insertion rod, one end of the spring is connected to the insertion rod, and the other end of the spring is connected to the first tube body. The spring is in a stretched state, and the spring causes the insertion rod to slide toward the second tube body.

6. A temperature sensor according to claim 4, characterized in that: One end of the insertion rod close to the second tube body is spherical.

7. A temperature sensor according to claim 3, characterized in that: The end of the second tube body is provided with a first flange, the end of the thermocouple protection tube is provided with a second flange, and the first flange and the second flange are connected together by bolts and nuts.

8. A temperature sensor according to claim 7, characterized in that: The end of the second tube body is threadedly connected to the first flange, and the thermocouple protection tube is threadedly connected to the second flange.

9. A temperature sensor according to claim 7, characterized in that: A plurality of protruding rings are provided on a side of the first flange close to the second flange, and the plurality of protruding rings are arranged in sequence along the radial direction of the first flange. A plurality of grooves for accommodating the protruding rings are provided on a side of the second flange close to the first flange, and the plurality of grooves are arranged in sequence along the radial direction of the second flange.

10. A temperature sensor according to claim 7, characterized in that: An elastic layer is provided on one side of the first flange close to the second flange.

Images