Thermocouple resistant to thermal scouring

Abstract

The utility model provides a thermal-erosion-resistant thermocouple, a temperature transmission meter head is connected with a temperature-resistant protection tube through a connection protection tube, and a temperature measurement core body is arranged in a space formed by the temperature-resistant protection tube and the connection protection tube; the tail end of the connecting protection tube forms an arc-shaped structure; seen from the length direction of the whole thermocouple, the arc-shaped structure extends out of the tail end of the temperature-resistant protection tube to form an anti-impact protection structure; from the circumferential direction of the whole thermocouple, the arc-shaped bend of the whole arc-shaped structure comprising the anti-impact protection structure is matched with the outer surface of the temperature-resistant protection tube, so that the temperature-resistant protection tube is protected by the arc-shaped structure. According to the technical scheme, the whole arc-shaped structure protects the temperature-resistant protection pipe in the length direction and the circumferential direction, thermal scouring focuses on the arc-shaped structure and basically does not act on the temperature-resistant protection pipe any more after the materials are shunted through the whole arc-shaped structure, and therefore the temperature-resistant protection pipe is protected. Therefore, the accuracy and durability of temperature measurement and monitoring are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermocouples, in particular to a thermocouple resistant to heat erosion, which is suitable for measuring temperature at the tail of a cement kiln. Background Art

[0002] Cement kilns (i.e. cement rotary kilns) need to reach a certain temperature during the production process so that the raw materials can react completely in the kiln and obtain the appropriate output and quality; therefore, monitoring the temperature distribution in the kiln can help production personnel understand the thermal state of the cement kiln and take timely adjustment measures. In addition, the cement kiln is a high-temperature and high-pressure environment, so production personnel are required to monitor the temperature and thermal state in the kiln within a safe range to prevent accidents. In order to improve production safety, it is necessary to use thermocouples to monitor the temperature in the kiln in real time. The thermocouples are installed in the cement kiln. The temperature at different parts of the cement kiln is measured in real time through the temperature measuring points of the thermocouples. The measured temperature is transmitted to the outside of the kiln through the thermocouples and displayed on the display device, so that production personnel can control the reaction state of the materials in the kiln according to the temperature in the kiln.

[0003] Since the materials need to be fed into the cement kiln through the feeding port at the tail of the cement kiln, the materials fed will impact or hit the thermocouple installed there; and the temperature at the tail of the cement kiln is relatively high, and the highest temperature may reach 1400℃. Such a high temperature requires a higher temperature resistance for the thermocouple installed there. If the existing thermocouple is directly used for temperature measurement at the tail of the cement kiln, its temperature resistance cannot meet the above temperature requirements. Such a high temperature will cause the service life of the thermocouple to decrease or the thermocouple cannot accurately measure the temperature at the tail of the kiln. Although the use of a corundum outer tube to wrap the thermocouple temperature measurement core can improve its temperature resistance, continuous feeding will cause impact or collision to the corundum outer tube, and the corundum outer tube needs to be protected to extend the actual service life of the thermocouple. Utility Model Content

[0004] The utility model aims to overcome the deficiencies in the prior art and provides a thermocouple resistant to heat erosion, which is suitable for measuring temperature in the tail of a cement kiln or similar structures.

[0005] The technical purpose of the utility model is achieved through the following technical solutions.

[0006] A heat-resistant thermocouple comprises a temperature transmission head, a temperature-resistant protection tube, an anti-impact protection structure and a temperature measuring core, wherein:

[0007] The temperature transmission meter head is connected to the temperature resistant protection tube through the connecting protection tube, and the temperature measuring core is placed in the space formed by the temperature resistant protection tube and the connecting protection tube;

[0008] The tail end of the connected protection tube forms an arc structure; viewed from the length direction of the overall thermocouple, the arc structure extends out of the tail end of the heat-resistant protection tube to form an anti-impact protection structure; viewed from the circumference of the overall thermocouple, the arc bend of the entire arc structure including the anti-impact protection structure cooperates with the outer surface of the heat-resistant protection tube to achieve protection of the heat-resistant protection tube by the arc structure.

[0009] A heat-resistant protective layer is arranged on the outer wall of the entire arc structure including the anti-impact protective structure to improve the high-temperature erosion resistance of the entire arc structure. The heat-resistant protective layer adopts a layered structure formed by Stellite surfacing.

[0010] In the technical solution of the utility model, the distance that the arc structure extends out of the tail end of the heat-resistant protection tube is 10-20 cm.

[0011] In the technical solution of the present utility model, the central angle range of the arc of the arc structure corresponding to the arc is 160-200°, preferably 180°.

[0012] In the technical solution of the utility model, a temperature signal transmission interface is formed on the side of the temperature transmission meter head, which is used to transmit the temperature value obtained by the temperature transmission meter head to the display system.

[0013] In the technical solution of the utility model, the temperature-resistant protection tube is made of corundum material, which is connected to the connecting protection tube through high-temperature glue; the connecting protection tube serves to connect the temperature transmission head and the temperature-resistant protection tube, and at the same time protects the temperature measuring core and other structures located therein.

[0014] In the technical solution of the utility model, a mounting flange is provided on the connecting pipe for mounting the thermocouple at the tail of the cement kiln.

[0015] In the technical solution of the utility model, flange mounting holes are uniformly formed on the mounting flange along the circumference of the center of the circle, and preferably four are formed.

[0016] In the technical solution of the utility model, the temperature measuring core adopts an armored thermocouple or a thermocouple wire.

[0017] Compared with the prior art, the technical solution of the utility model has the following advantages: firstly, the heat-resistant protection tube itself is made of high-temperature resistant material to protect the temperature measuring core; secondly, the entire arc structure protects the heat-resistant protection tube from both the length direction and the circumferential direction, and the heat erosion is focused on the arc structure. After the entire arc structure diverts the material, it basically no longer acts on the heat-resistant protection tube, thereby improving the accuracy and durability of temperature measurement and monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram (1) of the utility model.

[0019] Figure 2 It is a structural schematic diagram (2) of the utility model.

[0020] In the figure: 1 is a heat-resistant protective tube, 2 is an anti-impact protective structure, 3 is a heat-resistant protective layer, 4 is a connecting protective tube, 5 is a temperature measuring core, 6 is a temperature transmission head, 7 is a temperature signal transmission interface, 8 is a mounting flange, and 9 is a flange mounting hole.

[0021] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0022] The technical solution of the utility model is further described below through specific embodiments and in conjunction with the accompanying drawings of the specification.

[0023] like Figures 1 to 2 As shown, a heat-resistant thermocouple includes a temperature transmission head 6, a temperature-resistant protection tube 1, an anti-impact protection structure 2 and a temperature measuring core 5, wherein:

[0024] The temperature transmission meter head 6 is connected to the temperature resistant protection tube 1 through the connecting protection tube 4, and the temperature measuring core 5 is placed in the space formed by the temperature resistant protection tube 1 and the connecting protection tube 4;

[0025] The tail end of the connecting protection tube 4 (i.e., one end of the connecting protection tube 4 is connected to the temperature transmission meter head, i.e., the head end of the connecting protection tube 4; the other end of the connecting protection tube 4 is its tail end) forms an arc structure; from the length direction of the entire thermocouple, i.e., from Figure 1 From the perspective of the view shown, from left to right, the arc-shaped structure extends out of the tail end of the temperature-resistant protection tube 1 to form an anti-impact protection structure 2; from the circumference of the entire thermocouple, that is, from Figure 2 From the viewing angle shown, viewed from top to bottom, the arc-shaped bend of the entire arc structure (including the anti-impact protection structure 2) cooperates with the outer surface of the heat-resistant protection tube 1 to achieve protection of the heat-resistant protection tube 1 by the arc structure; a heat-resistant protective layer 3 is provided on the outer wall of the entire arc structure (including the anti-impact protection structure 2) to improve the high-temperature erosion resistance of the entire arc structure, and the heat-resistant protective layer 3 adopts a layered structure formed by Stellite surfacing.

[0026] The arc structure extends out of the tail end of the heat-resistant protection tube by 10-20 cm.

[0027] The central angle of the arc structure corresponding to the arc is in the range of 160-200°, preferably 180°.

[0028] A temperature signal transmission interface 7 is formed on the side of the temperature transmission meter head 6 for transmitting the temperature value obtained by the temperature transmission meter head 6 to the display system.

[0029] The heat-resistant protection tube 1 is made of corundum material and is connected to the connecting protection tube 4 through high-temperature glue; the connecting protection tube 4 connects the temperature transmission meter head 6 and the heat-resistant protection tube 1, and protects the temperature measuring core 5 and other structures located therein.

[0030] A mounting flange 8 is provided on the connecting pipe 4 for mounting the thermocouple at the tail of the cement kiln.

[0031] Flange mounting holes 9 are uniformly formed on the mounting flange 8 along the circumference of the center of the circle, and preferably there are four of them.

[0032] The temperature measuring core 5 adopts an armored thermocouple or a thermocouple wire.

[0033] During installation, the thermocouple part located below the mounting flange 8 is extended into the tail of the cement kiln, and the entire arc structure including the anti-impact protection structure 2 is facing the direction of the incoming materials. During use, since the material carries heat and has a certain flow rate, the heat carried will be flushed (i.e., thermal flushing) on ​​the protective sleeve of the general thermocouple. The simple protective sleeve structure is prone to cracking, which in turn affects the use. After adopting the technical solution of the utility model, on the one hand, the heat-resistant protection tube itself is made of high-temperature resistant materials to protect the temperature measuring core; on the other hand, the entire arc structure (including the anti-impact protection structure) protects the heat-resistant protection tube in both the length direction and the circumferential direction. The heat flushing is mainly concentrated on the arc structure. After the entire arc structure diverts the material, it basically no longer acts on the heat-resistant protection tube, thereby improving the accuracy and durability of temperature measurement and monitoring. Since the arc structure does not wrap the entire heat-resistant protection tube 1, but exposes the surface of the heat-resistant protection tube 1, the temperature measuring core 5 can still measure and monitor the temperature of the material and / or the furnace. At the same time, due to the above protection, the damage of the heat-resistant protection tube 1 is avoided, thereby extending the service life and stability of the entire thermocouple.

[0034] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship between an element or feature shown in the figure and another element or feature. It should be understood that, in addition to the orientation shown in the figure, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "lower" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or located in other orientations), and the spatial relative description used here can be interpreted accordingly. Moreover, relational terms such as "first" and "second" are only used to distinguish one from another component with the same name, and do not necessarily require or imply that there is any such actual relationship or order between these components.

[0035] The above is a detailed description of the utility model, but the above content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A thermocouple resistant to heat erosion, characterized in that: It includes a temperature transmission meter head, a temperature-resistant protection tube, an anti-impact protection structure and a temperature measuring core, wherein: the temperature transmission meter head is connected to the temperature-resistant protection tube through a connecting protection tube, and the temperature measuring core is placed in a space formed by the temperature-resistant protection tube and the connecting protection tube; The tail end of the connected protection tube forms an arc structure; viewed from the length direction of the overall thermocouple, the arc structure extends out of the tail end of the heat-resistant protection tube to form an anti-impact protection structure; viewed from the circumference of the overall thermocouple, the arc bend of the entire arc structure including the anti-impact protection structure cooperates with the outer surface of the heat-resistant protection tube to achieve protection of the heat-resistant protection tube by the arc structure.

2. A heat-resistant thermocouple according to claim 1, characterized in that: A temperature-resistant protective layer is arranged on the outer wall of the entire arc-shaped structure including the anti-impact protective structure.

3. A heat-resistant thermocouple according to claim 2, characterized in that: The heat-resistant protective layer adopts a layered structure formed by Stellite cladding.

4. A heat-resistant thermocouple according to any one of claims 1 to 3, characterized in that: The arc structure extends out of the tail end of the heat-resistant protection tube by 10-20 cm.

5. A heat-resistant thermocouple according to any one of claims 1 to 3, characterized in that: The arc of the arc structure corresponds to a central angle range of 160-200°.

6. A heat-resistant thermocouple according to claim 5, characterized in that: The central angle range corresponding to the arc of the arc structure is 180°.

7. A heat-resistant thermocouple according to any one of claims 1 to 3, characterized in that: A temperature signal transmission interface is formed on the side of the temperature transmission meter head.

8. A heat-resistant thermocouple according to any one of claims 1 to 3, characterized in that: The heat-resistant protection tube is made of corundum material and is connected to the connecting protection tube through high-temperature glue.

9. A heat-resistant thermocouple according to any one of claims 1 to 3, characterized in that: A mounting flange is arranged on the connecting pipe, and flange mounting holes are evenly formed on the mounting flange along the circumference of the center of the circle.

10. A heat-resistant thermocouple according to any one of claims 1 to 3, characterized in that: The temperature measuring core adopts armored thermocouple or thermocouple wire.

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