Blowing type sheathed thermocouple temperature measuring device

Abstract

The utility model belongs to the technical field of temperature measuring devices, and particularly discloses a blowing type armored thermocouple temperature measuring device which comprises an exchange tube, a thermocouple is arranged on the exchange tube in a penetrating mode, a gas input end and a gas output end are arranged on the exchange tube, a connecting tube set is arranged on the exchange tube, and the sensing end of the thermocouple is located in the connecting tube set. The connecting pipe group is used for being fixed with a to-be-tested device; the breather pipe is arranged on the exchange pipe, a gas inlet channel is arranged between the breather pipe and the thermocouple, a gas outlet channel is arranged between the breather pipe and the connecting pipe group, the gas inlet channel is communicated with the gas input end, and the gas outlet channel is communicated with the gas output end; and the gas blowing assembly is used for inputting gas to the gas input end. According to the utility model, the gas inlet channel and the gas outlet channel are formed in the temperature measuring device through the arranged breather pipe, so that the temperature measuring device can be filled with inert gas, the induction end of the thermocouple is prevented from being oxidized due to contact with a high-temperature medium, and the service life of the temperature measuring device is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature measuring devices, in particular to an air-blowing armored thermocouple temperature measuring device. Background Art

[0002] Thermocouples are one of the commonly used temperature sensors. In the temperature monitoring of the cold collectors and reactors in the synthetic ammonia projects of the chemical industry, thermocouples are often used to measure the temperatures of multiple locations. Generally, the monitored temperature values ​​are high and change frequently, so the thermocouples are required to have a fast reaction speed and be resistant to high-temperature oxidation.

[0003] In the prior art, a shell is generally provided outside the thermocouple to prevent the sensing end of the thermocouple from direct contact with the high-temperature medium. However, during use, the high-temperature medium will still enter the outer shell and contact the thermocouple. After long-term use, the sensing end of the thermocouple will be oxidized, resulting in a short service life of the thermocouple. In view of this, the applicant proposes an air-blown armored thermocouple temperature measuring device. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide an air-blowing armored thermocouple temperature measuring device to solve the problem of low service life of the thermocouple temperature measuring device in the prior art.

[0005] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides an air-blowing armored thermocouple temperature measuring device, comprising:

[0006] An exchange tube, wherein a thermocouple is provided through the exchange tube, a gas input end and a gas output end are provided on the exchange tube, a connecting tube group is provided on the exchange tube, a sensing end of the thermocouple is located in the connecting tube group, and the connecting tube group is used to be fixed to the device to be tested;

[0007] A vent pipe is arranged on the exchange pipe, an air inlet channel is arranged between the vent pipe and the thermocouple, and an air outlet channel is arranged between the vent pipe and the connecting pipe group, wherein the air inlet channel is communicated with the gas input end, and the air outlet channel is communicated with the gas output end;

[0008] The blowing component is used to input gas to the gas input end.

[0009] Optionally, the connecting tube group includes a connecting tube and a fixing tube, the connecting tube is detachably connected to the exchange tube, the fixing tube is detachably connected to the connecting tube, and the fixing tube is provided with a fixing piece for connecting to the device to be tested.

[0010] Optionally, it also includes a fixing component for connecting the exchange tube and the connecting tube, the fixing component is arranged between the exchange tube and the connecting tube, the fixing component includes a first connecting member, a second connecting member and a locking nut, wherein the first connecting member is threadedly connected to the exchange tube, the locking nut is sleeved on the first connecting member, the first connecting member is threadedly connected to the connecting tube, and the first connecting member is threadedly connected to the locking nut.

[0011] Optionally, a retention cavity is formed between the fixing assembly and the connecting pipe, and the retention cavity is communicated with the gas outlet channel and the gas output end.

[0012] Optionally, a gas outlet piece is provided on the exchange tube, the gas outlet piece is fixedly connected to the exchange tube, a gas outlet port is provided on the gas outlet piece, and the gas outlet port is communicated with the gas output end.

[0013] Optionally, a protective cap is provided at one end of the thermocouple away from the exchange tube group, a first ferrule joint is provided at one end of the exchange tube away from the ventilation pipe, and a compression nut for fixing the first ferrule joint is threadedly connected on the exchange tube.

[0014] Optionally, one end of the exchange tube away from the ventilation tube is threadedly connected to a junction box, and the wires of the thermocouple pass through a protective cap and are arranged in the junction box.

[0015] Optionally, the blowing assembly includes a gas delivery member, a flow meter and a valve connected thereto, wherein an output end of the valve is communicated with the gas input end.

[0016] Optionally, an air supply pipe is provided between the flow meter and the valve, and a second ferrule joint is provided on the air supply pipe for connecting with the valve.

[0017] Optionally, a sealing ring is provided between the first connecting member and the second connecting member.

[0018] As described above, the air-blowing armored thermocouple temperature measuring device proposed by the utility model has the following beneficial effects:

[0019] (1) Compared with the prior art, the present invention can realize the input and output of gas by setting up an exchange tube. After the gas is input into the entire device, the gas can be discharged from the gas output end, ensuring that the gas can always fill the temperature measuring device, so that the inside of the temperature measuring device is always maintained in a positive pressure state, and preventing high-temperature medium from entering the temperature measuring device and contacting the sensing end of the thermocouple.

[0020] (2) Compared with the prior art, the utility model forms an air inlet channel and an air outlet channel in the temperature measuring device through the ventilation pipe, and the air inlet channel is connected to the gas input end, and the air outlet channel is connected to the gas output end, forming a gas circuit, ensuring the effective circulation of the gas, taking away the heat from the thermocouple sensing end, realizing the heat dissipation function, and extending the service life of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Shown is a schematic diagram of an embodiment of the utility model;

[0022] Figure 2 Shown is an enlarged view of point A in one embodiment of the utility model;

[0023] Figure 3 Shown is an enlarged view of point B in an embodiment of the utility model;

[0024] Figure 4 It shows an enlarged view of point C in one embodiment of the present invention.

[0025] Description of reference numerals:

[0026] Junction box 1, exchange tube 2, thermocouple 3, sensing end 301, compression nut 4, first ferrule joint 5, protective cap 6, gas input end 7, vent pipe 8, air inlet channel 9, gas output end 10, air outlet piece 11, air outlet 12, first connecting piece 13, locking nut 14, second connecting piece 15, sealing ring 16, connecting pipe 17, retention cavity 18, fixing pipe 19, air outlet channel 20, fixing piece 21, bottom plate 22, gas delivery piece 23, flow meter 24, gas delivery pipe 25, valve 26, second ferrule joint 27. DETAILED DESCRIPTION

[0027] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0028] It should be noted that the diagrams provided in the present embodiment are only used to illustrate the basic concept of the present invention in a schematic manner, so the diagrams only show the components related to the present invention rather than the number, shape and size of the components in the actual implementation. The type, quantity and proportion of each component in the actual implementation can be changed at will, and the layout of the components may be more complicated. The structure, proportion, size, etc. shown in the diagrams attached to this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that the present invention can be implemented, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effect and purpose that the present invention can produce. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of the implementation of the present utility model without substantially changing the technical content.

[0029] like Figure 1-Figure 4 As shown, the utility model provides an air-blowing armored thermocouple temperature measuring device.

[0030] In an exemplary embodiment, the air-blown armored thermocouple temperature measuring device comprises:

[0031] An exchange tube 2, a thermocouple 3 is provided through the exchange tube 2, a gas input end 7 and a gas output end 10 are provided on the exchange tube 2, a connecting tube group is provided on the exchange tube 2, a sensing end 301 of the thermocouple 3 is located in the connecting tube group, and the connecting tube group is used to be fixed to the device to be tested;

[0032] A vent pipe 8 is arranged on the exchange pipe 2, an air inlet channel 9 is arranged between the vent pipe 8 and the thermocouple 3, and an air outlet channel 20 is arranged between the vent pipe 8 and the connecting pipe group, wherein the air inlet channel 9 is communicated with the gas input end 7, and the air outlet channel 20 is communicated with the gas output end 10;

[0033] The blowing component is used to input gas to the gas input end 7.

[0034] In this embodiment, the exchange tube 2 is provided to realize the input and output of gas. After the gas is input into the entire device, the gas can be discharged from the gas output end 10, ensuring that the gas can always fill the temperature measuring device, so that the inside of the temperature measuring device is always kept in a positive pressure state, and avoiding the high-temperature medium from entering the temperature measuring device and contacting the sensing end 301 of the thermocouple 3. At the same time, in the utility model, the ventilation pipe 8 is provided to form an air inlet channel 9 and an air outlet channel 20 in the temperature measuring device, and the air inlet channel 9 is connected to the gas input end 7, and the air outlet channel 20 is connected to the gas output end 10, forming a gas loop, ensuring the effective circulation of the gas, taking away the heat of the sensing end 301 of the thermocouple 3, realizing the heat dissipation function, and extending the service life of the utility model.

[0035] In an exemplary embodiment, the connecting tube set includes a connecting tube 17 and a fixing tube 19 . The connecting tube 17 is detachably connected to the exchange tube 2 . The fixing tube 19 is detachably connected to the connecting tube 17 . The fixing tube 19 is provided with a fixing member 21 for connecting to the device under test.

[0036] In this embodiment, the connecting pipe 17 is provided so that the connecting pipe 17 can be indirectly connected to the exchange tube 2, and the fixed pipe 19 is provided mainly for connecting with the device to be measured temperature to achieve the stability of temperature measurement, and the fixing part 21 in this embodiment adopts a flange plate for easy installation.

[0037] Exemplarily, in this embodiment, a fixing assembly for connecting the exchange tube 2 and the connecting tube 17 is also included, the fixing assembly is arranged between the exchange tube 2 and the connecting tube 17, and the fixing assembly includes a first connecting member 13, a second connecting member 15 and a locking nut 14, wherein the first connecting member 13 is threadedly connected to the exchange tube 2, the locking nut 14 is sleeved on the first connecting member 13, the first connecting member 13 is threadedly connected to the connecting tube 17, and the first connecting member 13 is threadedly connected to the locking nut 14. The fixing assembly provided in this embodiment can realize the connection between the connecting tube 17 and the exchange tube 2, and since the on-site installation position is first, the locking nut 14 can be removed, and the exchange tube 2 can be rotated to facilitate the exchange tube 2 to be connected to the blowing assembly, and it is also convenient to install the ventilation pipe 8.

[0038] It is worth noting that a retention cavity 18 is formed between the fixing assembly and the connecting pipe 17, and the retention cavity 18 is communicated with the gas outlet channel 20 and the gas output end 10. In this embodiment, a sealing ring 16 is provided between the first connecting member 13 and the second connecting member 15. The provided sealing ring 16 can prevent gas leakage in the retention cavity 18.

[0039] It should also be noted that, in the present embodiment, the ventilation pipe 8 is connected to the ventilation pipe 8 by welding. During the specific installation, the first connecting member 13 can be removed to facilitate the welding of the ventilation pipe 8 to the exchange pipe 2.

[0040] In an exemplary embodiment, a gas outlet member 11 is provided on the exchange tube 2 , the gas outlet member 11 is fixedly connected to the exchange tube 2 , a gas outlet port 12 is provided on the gas outlet member 11 , and the gas outlet port 12 is communicated with the gas output end 10 .

[0041] The gas outlet 11 provided in this embodiment has a gas outlet 12 which is connected to the gas output end 10. Therefore, the gas will eventually reach the gas outlet 12, so as to facilitate gas collection and recycling.

[0042] In this embodiment, the gas outlet member 11 is fixedly connected to the side wall of the exchange tube 2 by welding.

[0043] In an exemplary embodiment, a protective cap 6 is provided at one end of the thermocouple 3 away from the exchange tube 2 group, a first ferrule joint 5 is provided at one end of the exchange tube 2 away from the ventilation pipe 8, and a compression nut 4 for fixing the first ferrule joint 5 is threadedly connected to the exchange tube 2.

[0044] The thermocouple 3 in this embodiment is an armored thermocouple 3, and the protective cap 6 is used to protect the armored thermocouple 3 and fix the wire of the thermocouple 3. At the same time, the thermocouple 3 can be firmly fixed on the exchange tube 2 through the clamping nut 4 and the first ferrule joint 5.

[0045] For example, in this embodiment, the end of the exchange tube 2 away from the ventilation tube 8 is threadedly connected to the junction box 1, and the wires of the thermocouple 3 are arranged in the junction box 1 through the protective cap 6. The arranged junction box 1 can place the wires of the thermocouple 3 to ensure the normal operation of the thermocouple 3.

[0046] It is worth noting that the first ferrule joint 5 in this embodiment is a prior art and will not be described in detail herein. In this embodiment, other fixing methods can also be used to fix the thermocouple 3 on the exchange tube 2.

[0047] In an exemplary embodiment, the blowing assembly includes a gas delivery member 23 , a flow meter 24 , and a valve 26 connected thereto, wherein an output end of the valve 26 is communicated with the gas input end 7 .

[0048] In this embodiment, the gas delivery component 23, flow meter 24 and valve 26 can accurately control the amount of gas entering the temperature measuring device to ensure that the inert gas can fill the interior of the temperature measuring device and prevent the sensing end 301 of the thermocouple 3 from being oxidized. The gas delivery component 23 and the flow meter 24 are installed on the base plate 22, and the gas delivery component 23 and the flow meter 24 are connected by a pipeline.

[0049] Exemplarily, an air pipe 25 is provided between the flow meter 24 and the valve 26, and a second ferrule joint 27 is provided on the air pipe 25 for connecting with the valve 26. The second ferrule joint 27 in this embodiment is used to connect the air pipe 25 with the valve 26 to avoid failure of the connection at the interface between the air pipe 25 and the valve 26.

[0050] In summary, in the present invention, the ventilation pipe 8 is provided to form an air inlet channel 9 and an air outlet channel 20 inside the temperature measuring device, so that the inert gas can fill the temperature measuring device, avoiding oxidation caused by contact between the sensing end 301 of the thermocouple 3 and the high-temperature medium, thereby improving the service life of the present invention.

[0051] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. An air-blown armored thermocouple temperature measuring device, characterized in that: include: An exchange tube, wherein a thermocouple is provided through the exchange tube, a gas input end and a gas output end are provided on the exchange tube, a connecting tube group is provided on the exchange tube, a sensing end of the thermocouple is located in the connecting tube group, the connecting tube group is used to be fixed to the device to be tested, the connecting tube group includes a connecting tube and a fixing tube, the connecting tube is detachably connected to the exchange tube, the fixing tube is detachably connected to the connecting tube, a fixing piece for connecting to the device to be tested is provided on the fixing tube, and a fixing assembly for connecting the exchange tube and the connecting tube is also provided, the fixing assembly is arranged between the exchange tube and the connecting tube; A vent pipe is arranged on the exchange pipe, an air inlet channel is arranged between the vent pipe and the thermocouple, and an air outlet channel is arranged between the vent pipe and the connecting pipe group, wherein the air inlet channel is communicated with the gas input end, the air outlet channel is communicated with the gas output end, a retention cavity is formed between the fixing assembly and the connecting pipe, and the retention cavity is communicated with the air outlet channel and the gas output end; The blowing component is used to input gas to the gas input end.

2. The air-blown armored thermocouple temperature measuring device according to claim 1, characterized in that: The fixing assembly includes a first connecting piece, a second connecting piece and a locking nut, wherein the first connecting piece is threadedly connected to the exchange pipe, the locking nut is sleeved on the first connecting piece, the first connecting piece is threadedly connected to the connecting pipe, and the first connecting piece is threadedly connected to the locking nut.

3. The air-blown armored thermocouple temperature measuring device according to claim 1, characterized in that: The exchange tube is provided with a gas outlet component, the gas outlet component is fixedly connected to the exchange tube, the gas outlet component is provided with a gas outlet, and the gas outlet is communicated with the gas output end.

4. The air-blown armored thermocouple temperature measuring device according to claim 1, characterized in that: A protective cap is provided at one end of the thermocouple away from the exchange tube group, a first ferrule joint is provided at one end of the exchange tube away from the ventilation pipe, and a compression nut for fixing the first ferrule joint is threadedly connected on the exchange tube.

5. The air-blown armored thermocouple temperature measuring device according to claim 4 is characterized in that: One end of the exchange tube away from the ventilation tube is threadedly connected to a junction box, and the wire of the thermocouple passes through a protective cap and is arranged in the junction box.

6. The air-blown armored thermocouple temperature measuring device according to claim 1, characterized in that: The blowing assembly comprises a gas delivery member, a flow meter and a valve connected thereto, wherein the output end of the valve is communicated with the gas input end.

7. The air-blown armored thermocouple temperature measuring device according to claim 6, characterized in that: An air delivery pipe is provided between the flow meter and the valve, and a second ferrule joint is provided on the air delivery pipe for connecting with the valve.

8. The air-blown armored thermocouple temperature measuring device according to claim 2, characterized in that: A sealing ring is provided between the first connecting member and the second connecting member.

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