External heating type rotary furnace with internal temperature measurement function
By designing a combined structure of insulation layer, furnace cover, signal derivation assembly and thermocouple assembly in an external thermal rotary furnace, the problem of fixity and effectiveness of the temperature measurement system under the rotation of the furnace tube and high temperature environment is solved, and the furnace tube is realized Accurate monitoring and control of internal temperature.
Patent Information
- Application Number
- CN202420206925.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-26
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-01-26
AI Technical Summary
There are two major problems in the temperature measurement of existing external heat rotary furnaces: one is that the furnace pipe cannot be fixed by rotating, and the other is that the temperature measurement system fails due to the high temperature environment, which cannot accurately feedback the true temperature of the materials inside the furnace pipe.
An external thermal rotary furnace structure including an insulation layer, a furnace cover, a signal derivation assembly and a thermocouple assembly are designed. The probe of the thermocouple assembly extends into the interior through the outer wall of the furnace tube and transmits a temperature signal to the outside through the signal derivation assembly. The controller uses thermal insulation sleeves and brushes to achieve signal transmission in high-temperature environments, ensuring the accuracy and stability of temperature measurement data.
Real-time and accurate monitoring and control of the internal temperature of the external heat rotary furnace is realized, avoiding the problem of failure of the temperature measurement system due to the rotation of the furnace pipe and the high temperature environment, and providing a compact, convenient and accurate temperature measurement solution.
Smart Images
Figure CN222143714U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of external heating type rotary furnaces, in particular to an external heating type rotary furnace with an internal temperature measurement function. Background Art
[0002] The externally heated rotary kiln heats the outer wall of the furnace tube through the heating element, thereby indirectly heating the material inside the furnace tube. At the same time, the furnace tube rotates to achieve uniform heating of the material. In order to control the temperature of the material, the temperature of the material is generally measured by a thermocouple and the heating element is fed back to control the heating element. How to ensure that the measured temperature can accurately feedback the actual temperature of the material as much as possible is the key to the temperature control system of the externally heated rotary kiln.
[0003] At present, the temperature measurement of external heating rotary furnace generally adopts the outer wall temperature measurement of furnace tube, that is, the thermocouple temperature measuring probe is close to the outer wall of furnace tube for measurement. The temperature actually measured by this method is the temperature of the outer wall of furnace tube, and there is a temperature difference between the outer wall temperature and the temperature of the material inside the furnace tube, and the measurement data cannot reflect the actual temperature of the material. In addition, the prior art mentions that the internal temperature measurement of external heating rotary furnace can adopt internal suspension type, and the furnace cover is fixed at both ends of the furnace tube to set and install fixed supports, and the thermocouple probe is extended into the furnace tube through the fixed support and hung down, so that the probe is close to the furnace tube, but this method is limited to temperature measurement when there is no material running. When there is material, the material will interfere with the temperature measuring probe. The prior art also mentions that the temperature measuring probe is inserted from the outside of the furnace tube, and is led out from the outside of the furnace tube to the normal temperature section through a high-temperature wire, and a large-sized brush is set on the outside of the furnace tube to realize the transmission of electrical signals. However, the brush size required for this method is large, the operation jump is large, and the wear is large. It can be seen that there are two problems with directly measuring the temperature inside a rotating high-temperature furnace tube: first, the temperature measurement system cannot be fixed due to the rotation of the furnace tube; second, the high temperature environment causes the temperature measurement system to fail. Utility Model Content
[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an externally heated rotary furnace with an internal temperature measurement function which has a compact structure, is convenient to assemble and disassemble, and has accurate temperature measurement.
[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0006] An externally heated rotary furnace with an internal temperature measurement function comprises: an insulation layer, a furnace cover, a signal derivation component, a furnace tube and a thermocouple component; the interior of the furnace tube is a working chamber for loading materials, the insulation layer surrounds the outer circumference of the furnace tube, the space between the insulation layer and the furnace tube is a heating chamber, a heating element is arranged in the heating chamber to heat the outer wall of the furnace tube; the furnace cover is sealed and connected to the end of the furnace tube, and the furnace cover rotates with the furnace tube; one end of the thermocouple component passes through the outer wall of the furnace tube and extends into the working chamber, the other end of the thermocouple component passes through the heating chamber and the furnace cover in sequence along the outer wall of the furnace tube, and is connected to a signal derivation component arranged outside the furnace cover, the signal derivation component is used to transmit the temperature signal of the thermocouple component to an external controller to realize real-time monitoring and control of the internal temperature of the furnace tube.
[0007] As a further improvement of the present invention, the thermocouple assembly includes a thermocouple and a thermocouple wire, one end of the thermocouple passes through the outer wall of the furnace tube and extends into the working chamber, the other end of the thermocouple is located in the heating chamber and is connected to one end of the thermocouple wire, and the other end of the thermocouple wire passes through the heating chamber and the furnace cover in sequence along the outer wall of the furnace tube and is connected to the signal export assembly.
[0008] As a further improvement of the present invention, the thermocouple assembly further includes a thermal insulation sleeve, which is wrapped around the outside of the thermocouple wire to isolate the thermocouple wire from high temperature.
[0009] As a further improvement of the present invention, the signal export component includes a wire and a brush, one end of the wire is connected to the thermocouple wire and rotates with the furnace tube, the other end of the wire contacts the brush, the brush remains fixed, and the brush is used to transmit the temperature signal of the thermocouple to an external controller.
[0010] As a further improvement of the utility model, a plurality of partitions are provided in the thermal insulation layer to divide the heating chamber into a plurality of temperature zones, and each temperature zone is provided with a thermocouple and a heating element.
[0011] As a further improvement of the present invention, the number of the wires and brushes matches the number of the thermocouples.
[0012] As a further improvement of the utility model, the main body of the signal export component is a cylindrical composite conductor, the innermost layer of the composite conductor is a solid straight conductor, the remaining layers are solid annular conductors, and an insulating layer is provided between adjacent layers of conductors.
[0013] As a further improvement of the utility model, the heating element is a resistance wire or a silicon carbon rod or a gas burner.
[0014] Compared with the prior art, the advantages of the utility model are:
[0015] The utility model discloses an externally heated rotary furnace with an internal temperature measurement function. The main structure of the externally heated reheating furnace is composed of a heat-insulating layer, a furnace cover, a signal derivation component, a furnace tube and a thermocouple component. The interior of the furnace tube is a working chamber for loading materials. The heat-insulating layer surrounds the outer periphery of the furnace tube. The space between the heat-insulating layer and the furnace tube forms a heating chamber. By arranging a heating element in the heating chamber, the outer wall of the furnace tube is heated. At the same time, the furnace cover is sealed and connected to the end of the furnace tube, and the furnace cover can rotate with the furnace tube. One end of the thermocouple component passes through the outer wall of the furnace tube and extends into the working chamber. The other end of the thermocouple component passes through the heating chamber and the furnace cover in turn along the outer wall of the furnace tube, and is connected to a signal derivation component arranged outside the furnace cover, so that the thermocouple component rotates with the furnace tube, and the situation of the thermocouple component falling off is avoided. The temperature signal of the thermocouple component is transmitted to an external controller through the signal derivation component, so that the real-time monitoring and control of the internal temperature of the furnace tube is realized, and finally the internal temperature measurement of the externally heated rotary furnace with materials is realized, and the temperature measurement data is true and reliable. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 The utility model is a schematic diagram of the structural principle of an externally heated rotary kiln with an internal temperature measurement function.
[0017] Figure 2 It is a schematic diagram of the structural principle of the signal export component in the utility model.
[0018] Legend: 1. Insulation layer; 2. Thermocouple; 3. Thermocouple wire; 4. Insulation sleeve; 5. Furnace hood; 6. Signal export component; 61. First wire; 62. Second wire; 63. Third wire; 64. Fourth wire; 65. Insulation layer; 66. Fourth brush; 67. Third brush; 68. Second brush; 69. First brush; 7. Furnace tube; 8. Heating element; 9. Heating chamber; 10. Partition; 11. Working chamber. DETAILED DESCRIPTION
[0019] The present invention is further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the protection scope of the present invention is not limited thereby.
[0020] Example
[0021] like Figure 1 and Figure 2As shown, the external heating rotary furnace with internal temperature measurement function of the utility model comprises: an insulation layer 1, a furnace cover 5, a signal export component 6, a furnace tube 7 and a thermocouple component. The interior of the furnace tube 7 is a working chamber 11 for loading materials, the insulation layer 1 surrounds the outer periphery of the furnace tube 7, the space between the insulation layer 1 and the furnace tube 7 is a heating chamber 9, and a heating element 8 is arranged in the heating chamber 9 to heat the outer wall of the furnace tube 7. The furnace cover 5 is sealed and connected to the end of the furnace tube 7, and the furnace cover 5 rotates with the furnace tube 7. One end of the thermocouple component passes through the outer wall of the furnace tube 7 and extends into the working chamber 11, and the other end of the thermocouple component passes through the heating chamber 9 and the furnace cover 5 in sequence along the outer wall of the furnace tube 7, and is connected to the signal export component 6 arranged outside the furnace cover 5. The signal export component 6 is used to transmit the temperature signal of the thermocouple component to the external controller to realize real-time monitoring and control of the internal temperature of the furnace tube 7.
[0022] In this embodiment, the main structure of the external rotary reheat furnace is composed of the insulation layer 1, the furnace cover 2, the signal output component 6, the furnace tube 7 and the thermocouple component; the interior of the furnace tube 7 is a working chamber 11 for loading materials, the insulation layer 1 is surrounded by the outer periphery of the furnace tube 7, and the space between the insulation layer 1 and the furnace tube 7 forms a heating chamber 9. By arranging a heating element 8 in the heating chamber 9, the outer wall of the furnace tube 7 is heated; at the same time, the furnace cover 5 is sealed and connected to the end of the furnace tube 7, so that the furnace cover 5 can rotate with the furnace tube 7; one end of the thermocouple component One end passes through the outer wall of the furnace tube 7 and extends into the working chamber 11, and the other end of the thermocouple assembly passes through the heating chamber 11 and the furnace cover 5 in sequence along the outer wall of the furnace tube 7, and is connected to the signal exporting assembly 6 arranged outside the furnace cover 5, so that the thermocouple assembly can rotate with the furnace tube 7, thereby avoiding the situation where the thermocouple assembly falls off; the temperature signal of the thermocouple assembly is transmitted to the external controller through the signal exporting assembly 6, thereby realizing real-time monitoring and control of the internal temperature of the furnace tube, and finally realizing the temperature measurement of the material inside the externally heated rotary furnace, and the temperature measurement data is true and reliable.
[0023] like Figure 1 As shown, in this embodiment, the thermocouple assembly includes a thermocouple 2 and a thermocouple wire 3. One end of the thermocouple 2 passes through the outer wall of the furnace tube 7 and extends into the working chamber 11. The other end of the thermocouple 2 is located in the heating chamber 9 and is connected to one end of the thermocouple wire 3. The other end of the thermocouple wire 3 passes through the heating chamber 9 and the furnace cover 5 in sequence along the outer wall of the furnace tube 7 and is connected to the signal export assembly 6.
[0024] Furthermore, the thermocouple assembly further includes a heat-insulating sleeve 4 , which is wrapped around the outside of the thermocouple wire 3 to isolate the thermocouple wire 3 from high temperature.
[0025] Specifically, the temperature probe of the thermocouple 2 penetrates the outer wall of the furnace tube 7 and extends into the working chamber 11. The part of the thermocouple 2 located outside the furnace tube 7 is covered with a heat-insulating sleeve 4 to isolate the external high temperature of the thermocouple 2 terminal and prevent the thermocouple 2 from being damaged during the heating process. The thermocouple wire 3 is connected to the terminal of the thermocouple 2, and the outside of the thermocouple wire 3 is covered with a heat-insulating sleeve 4 to isolate the external high temperature and prevent the thermocouple wire 3 from being damaged during the heating process. The heat-insulating sleeve 4 is axially fixed to the outer wall of the furnace tube 7 and rotates with the furnace tube 7. The thermocouple wires 3 distributed circumferentially and fixed to the outside of the furnace tube 7 are converged from the inside of the furnace cover 5 to the rotation axis position of the furnace tube 7, and each thermocouple wire 3 is connected to the signal export component 6.
[0026] In this embodiment, the signal derivation component 6 includes a wire and a brush, one end of the wire is connected to the thermocouple wire 3 and rotates with the furnace tube 7, the other end of the wire contacts the brush, the brush remains fixed, and the brush is used to transmit the temperature signal of the thermocouple 2 to the external controller. The signal derivation component 6 is small in size, less in wear, low in cost, and easy to replace.
[0027] like Figure 1 As shown, in this embodiment, a partition 10 is provided in the insulation layer 1 to divide the heating chamber 9 into two temperature zones, and both temperature zones are provided with independent thermocouples 2 and independent heating elements 8. In other embodiments, the heating chamber 9 can also be divided into multiple temperature zones by a partition 10 according to actual production needs, and independent thermocouples 2 and independent heating elements 8 are provided in each temperature zone to achieve independent heating and independent temperature measurement in each temperature zone, thereby improving the accuracy of temperature control inside the furnace tube 7.
[0028] In this embodiment, the average number of wires and brushes matches the number of thermocouples 2 to achieve independent temperature measurement in each temperature zone, and can realize integrated feedback of multi-point temperature measurement, that is, one signal export system can realize temperature signal transmission of multiple temperature zones, thereby improving the convenience and accuracy of temperature measurement.
[0029] In this embodiment, each thermocouple wire 3 passes through the center of the end face of the furnace hood 5 and is connected to the signal export component 6. The main body of the signal export component 6 is a cylindrical composite conductor. The innermost layer of the composite conductor is a solid straight conductor, and the remaining layers are solid annular conductors, and an insulating layer is provided between adjacent layers of conductors.
[0030] like Figure 2As shown, the inner core of the wire of the signal export component 6 is a solid first wire 61, the outer layer of the first wire 61 is covered with an insulating layer 65, the outer side of the insulating layer 65 is covered with a ring-shaped second wire 62, and the outer layer of the second wire 62 is covered with an insulating layer 65. According to this rule, the wires are distributed from the inside to the outside as solid first wire 61-insulating layer 65-ring-shaped second wire 62-insulating layer 65-ring-shaped third wire 63-insulating layer 65-ring-shaped fourth wire 64-insulating layer 65. One end of the four wires is respectively connected to the positive and negative thermocouple wires 3 of the two thermocouples 2, and rotates with the furnace tube 7. The other end of the wire contacts each brush, the first wire 61 contacts the first brush 69, the second wire 62 is released from the second brush 68, the third wire 63 contacts the third brush 67, and the fourth wire 64 contacts the fourth brush 66. When the equipment is running, the brushes are fixed, and the cylindrical composite wire of the signal export component 6 rotates around the center with the furnace tube 7. The thermocouple 2 signal is transmitted to the external controller through the action of the brushes, thereby realizing the effective transmission of the temperature signal in the furnace tube 7.
[0031] In this embodiment, the heating element 8 is a resistance wire. In other embodiments, the heating element 8 can be a silicon carbon rod or a gas burner.
[0032] In this embodiment, a thermocouple probe is used to penetrate the hot zone furnace tube, and the probe is extended into the material layer, which can accurately measure the actual temperature in the furnace; the signal transmission system adopts a multi-conductor + brush structure, which has a compact structure, small wear and tear, and is easy to replace; the signal transmission system adopts a multi-conductor structure, which can realize the synchronous transmission of multiple groups of temperature measurement signals.
[0033] Although the utility model is disclosed as above with preferred embodiments, it is not intended to limit the utility model. Any technician familiar with the art can use the above disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the utility model without departing from the spirit and technical solution of the utility model, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of protection of the technical solution of the utility model.
Claims
1. An externally heated rotary kiln with an internal temperature measurement function, characterized in that: include: The invention relates to a heat-insulating layer (1), a furnace cover (5), a signal derivation component (6), a furnace tube (7) and a thermocouple component; the interior of the furnace tube (7) is a working chamber (11) for loading materials, the heat-insulating layer (1) surrounds the outer periphery of the furnace tube (7), the space between the heat-insulating layer (1) and the furnace tube (7) is a heating chamber (9), a heating element (8) is arranged in the heating chamber (9) to heat the outer wall of the furnace tube (7); the furnace cover (5) is sealed and connected to the end of the furnace tube (7), and the furnace cover (5) rotates with the furnace tube (7); one end of the thermocouple component passes through the outer wall of the furnace tube (7) and extends into the working chamber (11), and the other end of the thermocouple component passes through the heating chamber (9) and the furnace cover (5) in sequence along the outer wall of the furnace tube (7), and is connected to a signal derivation component (6) arranged outside the furnace cover (5), and the signal derivation component (6) is used to transmit the temperature signal of the thermocouple component to an external controller to realize real-time monitoring and control of the internal temperature of the furnace tube (7).
2. The externally heated rotary kiln with internal temperature measurement function according to claim 1, characterized in that: The thermocouple assembly comprises a thermocouple (2) and a thermocouple wire (3); one end of the thermocouple (2) passes through the outer wall of the furnace tube (7) and extends into the working chamber (11); the other end of the thermocouple (2) is located in the heating chamber (9) and is connected to one end of the thermocouple wire (3); the other end of the thermocouple wire (3) passes through the heating chamber (9) and the furnace cover (5) in sequence along the outer wall of the furnace tube (7) and is connected to the signal derivation assembly (6).
3. The externally heated rotary kiln with internal temperature measurement function according to claim 2, characterized in that: The thermocouple assembly further comprises a heat-insulating sleeve (4), wherein the heat-insulating sleeve (4) is wrapped around the outside of the thermocouple wire (3) to isolate the thermocouple wire (3) from high temperature.
4. The externally heated rotary kiln with internal temperature measurement function according to claim 2, characterized in that: The signal export component (6) includes a wire and a brush. One end of the wire is connected to the thermocouple wire (3) and rotates with the furnace tube (7). The other end of the wire contacts the brush, which remains fixed. The brush is used to transmit the temperature signal of the thermocouple (2) to an external controller.
5. The externally heated rotary kiln with internal temperature measurement function according to claim 4, characterized in that: A plurality of partitions (10) are arranged in the thermal insulation layer (1) so as to divide the heating chamber (9) into a plurality of temperature zones, and each temperature zone is provided with a thermocouple (2) and a heating element (8).
6. The externally heated rotary kiln with internal temperature measurement function according to claim 5, characterized in that: The number of the wires and brushes matches the number of the thermocouples (2).
7. The externally heated rotary kiln with internal temperature measurement function according to claim 6, characterized in that: The main body of the signal export component (6) is a cylindrical composite conductor, the innermost layer of the composite conductor is a solid straight conductor, the remaining layers are solid annular conductors, and an insulating layer is provided between adjacent layers of conductors.
8. The externally heated rotary kiln with internal temperature measurement function according to any one of claims 1 to 7, characterized in that: The heating element (8) is a resistance wire, a silicon carbon rod or a gas burner.