Temperature measuring device of rotary furnace

Abstract

The utility model discloses a temperature measuring device for a rotary furnace, which comprises a mounting shaft arranged between a front end wall and a rear end wall of the rotary furnace and a thermocouple armored wire fixed on the mounting shaft, and the thermocouple armored wire extends to or approaches a temperature monitoring position from the mounting shaft aiming at the temperature monitoring position. A thermocouple armored wire passes through the fixing sleeve and goes deep into the protective sleeve, and the fixing sleeve is connected with the opening of the protective sleeve; the protective sleeve is fixed on the fixing plate, and the fixing plate is connected with the mounting shaft and extends to a temperature monitoring position. When the rotary furnace operates, the installation shaft does not rotate, and the thermocouple armoring wire fixed on the installation shaft does not rotate, so that the thermocouple armoring wire is prevented from rotating or winding, the temperature measurement position can be kept unchanged, and the timeliness and the stability of temperature monitoring data are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of thermocouple temperature measurement, and more specifically to a temperature measuring device used in a rotary furnace or a rotary kiln. Background Art

[0002] A rotary kiln (or rotary kiln) is a thermal equipment used to calcine, roast, or dry granular and powdered materials. During operation, the material typically enters the furnace chamber through an inlet at the head of the rotary kiln. As the chamber rotates, the material is gradually moved to the outlet at the rear of the furnace by the action of the frying plate within the chamber. During this process, the rotary kiln calcines, roasts, or dries the material, requiring heating, temperature measurement, and control capabilities, such as inlet and outlet temperature control. For delicate operations, each section of the rotary kiln must have a temperature range along its length, controlled by equipment with heating, temperature measurement, and control capabilities. However, due to the rotation of the chamber during operation, the material is held at the bottom of the chamber by gravity. Using conventional thermocouples or RTDs for temperature measurement can easily lead to entanglement in the temperature signal transmission lines. Therefore, foreign manufacturers, such as Rosemount, have preset wireless thermocouple temperature acquisition modules on the inner wall of the rotary furnace, and wireless thermocouple temperature receiving and transmitting modules on the outer wall of the furnace or at a certain distance from the furnace. The design of internal and external wireless thermocouples avoids the entanglement problem of traditional temperature signal acquisition and transmission lines, but it also causes the following problems: (1) The temperature acquisition module set on the inner wall of the furnace rotates in a circle with the furnace, but the material that needs to be measured is basically kept at the bottom of the furnace. In actual use, only one temperature acquisition module cannot monitor the temperature of the material at all times. The temperature signal it outputs is often a pulse signal, which requires supporting software for algorithm analysis; (2) Due to the same problem as described in (1), the temperature acquisition modules are evenly set along the circumference of the inner wall of the furnace according to the amount of material and the volume of the furnace cavity occupied. In this way, it can basically maintain There is always a temperature acquisition module to monitor the temperature of the material at all times, but this also requires supporting software and algorithms for analysis. The increase in the number of temperature acquisition modules will undoubtedly increase the cost; (3) The temperature receiving and transmitting module is set outside the furnace cavity. After receiving the signal inside the furnace, it transmits it to a distant server. However, since the rotary furnace is generally equipped with a heating, insulation and temperature control system, and the surrounding supporting equipment often also has heating, insulation and temperature control functions, these will affect the reception and transmission of temperature signals, resulting in signal distortion. To avoid this problem, the temperature receiving and transmitting module is set up remotely or an isolation cover is used to protect the temperature receiving and transmitting module, which undoubtedly increases the cost. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a rotary kiln temperature measuring device.

[0004] The technical purpose of the present invention is achieved through the following technical solutions.

[0005] The rotary kiln temperature measuring device includes a mounting shaft arranged between the front end wall and the rear end wall of the rotary kiln, and a thermocouple temperature measuring unit fixed on the mounting shaft. For a certain temperature monitoring position, a certain thermocouple temperature measuring unit extends from the mounting shaft to or approaches the temperature monitoring position.

[0006] In the above technical solution, the thermocouple armor wire is fixed by fixing clips evenly distributed on the installation shaft.

[0007] In the above technical solution, the thermocouple temperature measurement unit is a thermocouple armored wire or a thermocouple armored temperature measurement core.

[0008] In the above technical solution, multiple temperature monitoring positions are set for the material along the length direction of the rotary furnace, and a thermocouple temperature measuring unit is used to monitor the temperature at each temperature monitoring position.

[0009] In the above technical solution, the temperature monitoring position is 3-5 mm above the copy board.

[0010] In the above technical solution, the fixing sleeve and the opening of the protective sleeve are connected by threads.

[0011] In the above technical solution, the thermocouple temperature measuring unit passes through the fixed sleeve and penetrates into the protective sleeve, and the fixed sleeve is connected to the opening of the protective sleeve; the protective sleeve is fixed on the fixed plate, the fixed plate is connected to the installation shaft, and extends to the temperature monitoring position.

[0012] In the above technical solution, a thermocouple mounting hole is provided on the front end wall of the rotary kiln outside the rotary kiln, and a flange short tube is fixedly connected to the hole. The thermocouple temperature measuring unit passes through the flange short tube and is connected to the junction box through a compensation wire.

[0013] In the above technical solution, an integral installation shaft is selected, or a plurality of installation shaft bodies are assembled into an integral installation shaft, such as by welding.

[0014] In the above technical solution, a support ring is provided on the mounting shaft, a bearing is provided outside the support ring, a support rod is provided between the bearing and the rotary furnace wall, and a thermocouple channel is provided on the support ring for the thermocouple temperature measuring unit to pass through.

[0015] In the above technical solution, support rods are evenly arranged along the circumference of the rotary kiln body, one end of which is fixedly connected to the rotary kiln wall, and the other end is fixedly connected to the bearing.

[0016] In the above technical solution, the above supporting structure is provided at the assembly position of multiple installation shafts, or multiple supporting structures are evenly provided on the installation shafts along the length direction of the rotary furnace.

[0017] In the above technical solution, the bearing adopts an annular bearing to cooperate with the support ring, and adopts a rotating or sliding bearing.

[0018] With the technical solution of this utility model, when the rotary kiln is in operation, the materials, the shovel, the furnace wall and other structures maintain their previous operating mode. Because the mounting shaft does not rotate, the multiple thermocouple armor wires fixed thereto do not rotate. As a result, the thermocouple armor wires located at various temperature monitoring positions will not rotate or become entangled, and the temperature measurement position can be basically maintained unchanged, thus ensuring the timeliness and stability of the temperature monitoring data. At the same time, a support structure is provided on the mounting shaft to support it and ensure the position of the thermocouple armor wires and prevent them from becoming entangled. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a rotary kiln temperature measuring device of the present utility model.

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of the rotary furnace in the utility model.

[0021] Figure 3 It is a structural diagram (1) of the support structure in the utility model.

[0022] Figure 4 It is a structural diagram (2) of the support structure in the utility model.

[0023] Among them, 1 is the junction box, 2 is the compensation wire, 3 is the flange short pipe, 4 is the installation shaft, 5 is the rotary furnace wall, 5-1 is the front end wall of the rotary furnace, 5-2 is the rear end wall of the rotary furnace, 6 is the copying plate, 7 is the fixing plate, 8 is the thermocouple armor wire, 9 is the fixing card, 10 is the installation hole, 11 is the fixing sleeve, 12 is the protective sleeve, 13 is the support rod, 14 is the bearing, 15 is the support ring, and 16 is the thermocouple channel. DETAILED DESCRIPTION

[0024] The technical solution of the present utility model is further described below with reference to specific embodiments.

[0025] like Figure 1As shown in Figure 2, a rotary kiln generally includes a furnace wall, a front wall (for mounting a charging port and the temperature collection and transmission components of a temperature measuring device), and a rear wall (for mounting a discharge port). Mounting holes are provided at the same height on the front and rear walls of the rotary kiln, and a mounting shaft is provided in each of the mounting holes. This shaft extends through the furnace cavity of the rotary kiln, with its front end extending out of the front wall and its rear end extending out of the rear wall. A stir plate is generally provided in the rotary kiln. Since the stir plate is located in the lower half or bottom of the furnace cavity, it stirs the material during operation (i.e., when the furnace cavity rotates), and the material is generally concentrated near the stir plate structure.

[0026] The rotary kiln temperature measuring device includes a mounting shaft disposed between the front end wall and the rear end wall of the rotary kiln, and a thermocouple armored wire fixed to the mounting shaft, and is used to detect the material temperature, wherein:

[0027] In the rotary furnace, a plurality of thermocouple armor wires are fixed on the mounting shaft, and the number of thermocouple armor wires is determined according to the number of positions where temperature measurement is required; preferably, the thermocouple armor wires are fixed by fixing clips evenly distributed on the mounting shaft;

[0028] In a rotary kiln, the locations where temperature monitoring is required are mostly material concentration areas, i.e., the bottom of the rotary kiln cavity, or the location where the copy plate is set in the cavity. According to the process requirements of using a rotary kiln for roasting, multiple temperature monitoring locations are set for the material along the length of the rotary kiln. For each temperature monitoring location, a thermocouple armored wire is used for temperature monitoring.

[0029] For a certain temperature monitoring position, a certain thermocouple armor wire extends from the installation axis to or close to the temperature monitoring position, such as 3-5 mm above the copy board.

[0030] The thermocouple armor wire passes through the fixed clamp and penetrates into the protective sleeve. The fixed clamp is connected to the opening of the protective sleeve, such as connected by threads, so that the thermocouple armor wire is centered in the protective sleeve. The protective sleeve is fixed on the fixed plate, and the fixed plate is connected to the installation shaft and extends to the temperature monitoring position.

[0031] In a rotary kiln, the fixed ferrule and protective sleeve work together to protect the centrally located thermocouple wires from impact and / or other impacts from the material. The fixed plate ensures the thermocouple wires extend toward the temperature monitoring location. During rotary kiln operation, the material, slab, and furnace walls maintain their original operating mode. Because the mounting shaft does not rotate, the several thermocouple wires affixed to it do not rotate. This prevents the thermocouple wires at each temperature monitoring location from rotating or becoming entangled, essentially maintaining the temperature measurement position unchanged and ensuring the timeliness and stability of temperature monitoring data.

[0032] Outside the rotary furnace, a thermocouple mounting hole is set on the front end wall of the rotary furnace, and a flange short pipe is fixedly connected to it. The thermocouple armored wire passes through the flange short pipe to play the role of installation, sealing and protection. Then it is connected to the temperature transmitter in the junction box through a compensation wire. Here, a 4-20mA current signal is selected for remote data transmission. This is mainly due to the consideration of the influence of the peripheral equipment of the rotary furnace on the signal. Therefore, the wireless transmission mode is abandoned and a long-distance 4-20mA current signal is used for transmission.

[0033] In practice, if the rotary kiln is long and an integral mounting shaft is selected, it is easy to cause defects or even breakage in the middle of the mounting shaft due to factors such as gravity and material action. Therefore, multiple support structures are set in the length direction of the mounting shaft to reinforce the mounting shaft, or multiple mounting shafts are spliced ​​(such as welding) to form an integral mounting shaft from the front end wall to the rear end wall of the rotary kiln, and at the same time, support structures are used for reinforcement support.

[0034] like Figure 3 and 4 As shown, a schematic diagram of the support structure, wherein along Figure 3 Observe in the direction of the arrow, and you will get Figure 4 The support structure includes support rods, bearings and support rings, among which:

[0035] A support ring is placed on the mounting shaft, a bearing is placed outside the support ring, a support rod is placed between the bearing and the rotary kiln wall, and a thermocouple channel is provided on the support ring to allow the thermocouple armor wire (or thermocouple armor temperature measurement core) to pass through and reach the next support structure. The support rods are evenly arranged along the circumference of the rotary kiln body, with one end of each rod fixedly connected to the rotary kiln wall and the other end fixedly connected to the bearing.

[0036] The above support structure can be installed at the joint of multiple mounting shafts, or multiple support structures can be evenly installed along the length of the rotary furnace. The bearings can be rotating or sliding bearings, such as ring bearings.

[0037] By adopting the above-mentioned support structure, on the one hand, the rotary furnace wall is used to support the installation shaft or its splicing. At the same time, when the rotary furnace is running, the support rod rotates with the furnace wall, and the bearing connected to it rotates, and the support ring and the installation shaft located in the center position do not rotate accordingly, thereby ensuring the stability of the position of the thermocouple armor wire and avoiding problems caused by entanglement.

[0038] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" are used in the embodiments to illustrate the relationship between an element or feature shown in the figures and another element or feature. It should be understood that, in addition to the orientation shown in the figures, 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 "above" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions 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 any such actual relationship or order between these components.

[0039] The above is an exemplary description of the present invention. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be made by other technical personnel in this field without expending creative labor falls within the scope of protection of the present invention.

Claims

1. Rotary kiln temperature measuring device, characterized in that: It includes an installation shaft arranged between the front end wall and the rear end wall of the rotary furnace, and a thermocouple temperature measuring unit fixed on the installation shaft. For a certain temperature monitoring position, a certain thermocouple temperature measuring unit extends from the installation shaft to or close to the temperature monitoring position.

2. The rotary kiln temperature measuring device according to claim 1, characterized in that: Select an integral mounting shaft, or assemble multiple mounting shaft bodies into an integral mounting shaft.

3. The rotary kiln temperature measuring device according to claim 1 or 2, characterized in that: A support ring is arranged on the installation shaft, a bearing is arranged outside the support ring, a support rod is arranged between the bearing and the rotary kiln wall, and a thermocouple channel is arranged on the support ring for the thermocouple temperature measuring unit to pass through.

4. The rotary kiln temperature measuring device according to claim 3, characterized in that: It is selected to set the support structure at the assembly point of multiple installation shaft bodies, or to evenly set multiple support structures on an integral installation shaft along the length direction of the rotary kiln.

5. The rotary kiln temperature measuring device according to claim 1 or 2, characterized in that: The thermocouple temperature measuring unit is a thermocouple armored wire or a thermocouple armored temperature measuring core; the thermocouple armored wire is fixed by fixing clips evenly distributed on the installation shaft.

6. The rotary kiln temperature measuring device according to claim 3, characterized in that: The thermocouple temperature measuring unit is a thermocouple armored wire or a thermocouple armored temperature measuring core; the thermocouple armored wire is fixed by fixing clips evenly distributed on the installation shaft.

7. The rotary kiln temperature measuring device according to claim 4, characterized in that: The thermocouple temperature measuring unit is a thermocouple armored wire or a thermocouple armored temperature measuring core; the thermocouple armored wire is fixed by fixing clips evenly distributed on the installation shaft.

8. The rotary kiln temperature measuring device according to claim 1 or 2, characterized in that: Along the length of the rotary kiln, multiple temperature monitoring positions are set for the material, and a thermocouple temperature measuring unit is used to monitor the temperature at each temperature monitoring position.

9. The rotary kiln temperature measuring device according to claim 3, characterized in that: Along the length of the rotary kiln, multiple temperature monitoring positions are set for the material, and a thermocouple temperature measuring unit is used to monitor the temperature at each temperature monitoring position.

10. The rotary kiln temperature measuring device according to claim 5, characterized in that: Along the length of the rotary kiln, multiple temperature monitoring positions are set for the material, and a thermocouple temperature measuring unit is used to monitor the temperature at each temperature monitoring position.

11. The rotary kiln temperature measuring device according to claim 1 or 2, characterized in that: The temperature monitoring position is 3-5mm above the copy board.

12. The rotary kiln temperature measuring device according to claim 3, characterized in that: The temperature monitoring position is 3-5mm above the copy board.

13. The rotary kiln temperature measuring device according to claim 5, characterized in that: The temperature monitoring position is 3-5mm above the copy board.

14. The rotary kiln temperature measuring device according to claim 8, characterized in that: The temperature monitoring position is 3-5mm above the copy board.

15. The rotary kiln temperature measuring device according to claim 1 or 2, characterized in that: Outside the rotary furnace, a thermocouple mounting hole is provided on the front end wall of the rotary furnace, and a flange short tube is fixedly connected thereto. The thermocouple temperature measuring unit passes through the flange short tube and is connected to the junction box through a compensation wire.

16. The rotary kiln temperature measuring device according to claim 1 or 2, characterized in that: The thermocouple temperature measuring unit passes through the fixed sleeve and penetrates into the protective sleeve, and the fixed sleeve is connected to the opening of the protective sleeve; the protective sleeve is fixed on the fixed plate, and the fixed plate is connected to the installation shaft and extends to the temperature monitoring position.

17. The rotary kiln temperature measuring device according to claim 3, characterized in that: The thermocouple temperature measuring unit passes through the fixed sleeve and penetrates into the protective sleeve, and the fixed sleeve is connected to the opening of the protective sleeve; the protective sleeve is fixed on the fixed plate, and the fixed plate is connected to the installation shaft and extends to the temperature monitoring position.

18. The rotary kiln temperature measuring device according to claim 5, characterized in that: The thermocouple temperature measuring unit passes through the fixed sleeve and penetrates into the protective sleeve, and the fixed sleeve is connected to the opening of the protective sleeve; the protective sleeve is fixed on the fixed plate, and the fixed plate is connected to the installation shaft and extends to the temperature monitoring position.

19. The rotary kiln temperature measuring device according to claim 8, characterized in that: The thermocouple temperature measuring unit passes through the fixed sleeve and penetrates into the protective sleeve, and the fixed sleeve is connected to the opening of the protective sleeve; the protective sleeve is fixed on the fixed plate, and the fixed plate is connected to the installation shaft and extends to the temperature monitoring position.

20. The rotary kiln temperature measuring device according to claim 3, characterized in that: The support rods are evenly arranged along the circumference of the rotary kiln body, one end of which is fixedly connected to the rotary kiln wall and the other end is fixedly connected to the bearing; the bearing adopts an annular bearing to cooperate with the support ring, and adopts a rotating or sliding bearing.

21. The rotary kiln temperature measuring device according to claim 6, characterized in that: The support rods are evenly arranged along the circumference of the rotary kiln body, one end of which is fixedly connected to the rotary kiln wall and the other end is fixedly connected to the bearing; the bearing adopts an annular bearing to cooperate with the support ring, and adopts a rotating or sliding bearing.

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