A connection structure for compensating conductors in a heating furnace

Abstract

The present invention provides a connection structure of a compensation wire used in a heating furnace, the connection structure comprises a compensation wire, the compensation wire is connected between a thermocouple and a measuring device, the thermocouple is arranged in the heating furnace, and the thermocouple is used to measure the temperature in the heating furnace; the compensation wire comprises a thermocouple connection end, the thermocouple connection end is connected to an end of the thermocouple extending out of the heating furnace, and a heat insulation layer is arranged between the thermocouple connection end and the heating furnace; the heat insulation layer is arranged between the compensation wire and the thermocouple connected in the heating furnace, so as to reduce the influence of the heat radiation of the heating furnace on the compensation wire as much as possible, so as to avoid premature aging of the compensation wire affecting the thermoelectric characteristics, thereby ensuring the accuracy of temperature measurement.

Description

Technical Field

[0001] The invention belongs to the technical field of compensation wire connection, and in particular relates to a connection structure of a compensation wire used in a heating furnace. Background Art

[0002] A thermocouple for temperature measurement is provided in the annular heating furnace, and the thermocouple is connected to the operating room where the thermocouple measurement results can be displayed through a compensation wire. The cold end of the thermocouple passes through the furnace roof of the annular heating furnace, and the compensation wire is directly connected to the cold end of the thermocouple at the furnace roof of the annular heating furnace, so that the distance between the compensation wire and the furnace roof is only 300mm.

[0003] The above-mentioned method of directly connecting the thermocouple and the compensation wire at the top of the heating furnace has the following problems:

[0004] 1. The distance between the compensation wire and the furnace top is relatively close, which causes a greater impact on the heat radiation of the annular heating furnace, thus affecting the measurement results. In addition, the compensation wire frequently fails due to being in a high temperature environment for a long time.

[0005] 2. Since the hot end of the thermocouple is not effectively insulated, the compensation wire joint is easily burned, causing a short circuit or open circuit and affecting the measurement results;

[0006] 3. When a fault occurs at the joint of the compensation wire, the fault occurs at the top of the heating furnace. When maintenance personnel handle the fault on the top of the furnace, there are safety risks such as burns, heat stroke, and falling from a height.

[0007] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0008] The object of the present invention is to provide a connection structure of a compensation conductor used in a heating furnace, so as to overcome the problem in the prior art that the compensation conductor is greatly affected by heat radiation, resulting in inaccurate temperature measurement.

[0009] In order to achieve the above object, the present invention provides the following technical solutions:

[0010] A connection structure for a compensation wire in a heating furnace, the connection structure comprising a compensation wire, the compensation wire being connected between a thermocouple and a measuring device, the thermocouple being arranged in the heating furnace, and the thermocouple being used to measure the temperature in the heating furnace;

[0011] The compensation wire comprises a thermocouple connection end, the thermocouple connection end is connected to one end of the thermocouple extending out of the heating furnace, and a heat insulation layer is arranged between the thermocouple connection end and the heating furnace.

[0012] As a preferred embodiment of the connection structure of the compensating conductor used in the heating furnace, the heat insulation layer is arranged on the outer furnace wall of the heating furnace.

[0013] As a preferred embodiment of the connection structure of the compensating wire used in the heating furnace, the thermal insulation layer is a ceramic fiber blanket, and the thermocouple passes through the ceramic fiber blanket and is connected to the compensating wire.

[0014] As a preferred embodiment of the connection structure of the compensation conductor used in the heating furnace, the heat insulation layer is a heat insulation sleeve covering the connection between the compensation conductor and the thermocouple.

[0015] As a preferred embodiment of the connection structure of the compensating conductor used in the heating furnace, the thermal insulation sleeve is made of asbestos.

[0016] As described above, the connection structure of the compensation wire used in the heating furnace is, as a preferred embodiment, the heating furnace is an annular heating furnace, and a compensation wire joint is provided at one end of the compensation wire away from the thermocouple, and the compensation wire joint is located in the middle of the space surrounded by the annular heating furnace.

[0017] As a preferred embodiment of the connection structure of the compensating wire used in the heating furnace, the connection structure further comprises a support frame, the compensating wire is arranged on the support frame, and the support frame comprises a horizontal frame and a vertical frame arranged in an L shape;

[0018] One end of the compensation wire connected to the thermocouple is located on the horizontal frame;

[0019] One end of the compensation wire away from the thermocouple is located on the vertical frame.

[0020] As a preferred embodiment of the connection structure of the compensating conductor used in the heating furnace, the distance between the horizontal frame and the furnace top of the annular heating furnace is greater than or equal to 1000 mm, and the vertical frame is located in the middle of the space enclosed by the annular heating furnace.

[0021] As a preferred embodiment of the connection structure of the compensating wire used in the heating furnace, the compensating wire is fixed to the cold end of the thermocouple by means of a fixing screw.

[0022] As a preferred embodiment of the connection structure of the compensating wire used in the heating furnace, a protective structure is arranged around the fixing screw;

[0023] The protection structure comprises a base and a protection cover, the base is fixedly arranged on the cold end of the thermocouple, and the protection cover and the base are detachably connected together.

[0024] Compared with the closest prior art, the technical solution provided by the present invention has the following excellent effects:

[0025] The present invention provides a connection structure of a compensation wire used in a heating furnace. A heat insulation layer is arranged between the compensation wire and a thermocouple connected in the heating furnace, thereby minimizing the influence of heat radiation from the heating furnace on the compensation wire, avoiding premature aging of the compensation wire and affecting thermoelectric characteristics, thereby ensuring the accuracy of temperature measurement.

[0026] The compensation wire leads the compensation wire joint to the inner ring of the annular heating furnace. The temperature in the inner ring of the annular heating furnace is relatively low, which prevents the compensation wire joint from being too close to the annular heating furnace and being burned to cause short circuit or open circuit, thereby ensuring that the measurement result is not affected; and the fault point at the joint connection position is set away from the heating furnace, reducing the safety risks of maintenance personnel being burned by high temperature, heatstroke, etc., and ensuring the personal safety of maintenance personnel; and a compensation wire joint is set at the end of the compensation wire away from the thermocouple, thereby extending the fault point to the compensation wire joint, and only plugging and unplugging operations need to be performed at the compensation wire joint, thereby reducing the disassembly work at the connection between the cold end of the thermocouple and the compensation wire, ensuring that the connection between the thermocouple and the compensation wire is securely fastened without looseness.

[0027] The distance between the cross frame in the support frame supporting the compensation wire and the furnace top is greater than the thickness of the insulation layer, so that the compensation wire on the cross frame is as far away from the annular heating furnace as possible, thereby reducing the heat radiation effect of the annular heating furnace on the compensation wire.

[0028] A heat-insulating sleeve is arranged around the connection between the compensation wire and the thermocouple, so as to protect the portion of the compensation wire close to the annular heating furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of a connection structure of a compensation conductor used in a heating furnace according to an embodiment of the present invention;

[0030] Figure 2 The figure is a schematic diagram of the structure of the specific connection between the compensation wire and the cold end of the thermocouple in the embodiment of the present invention.

[0031] In the figure: 1. roof of the annular heating furnace; 2. thermocouple; 21. base; 22. protective cover; 3. ceramic fiber blanket; 4. thermal insulation sleeve; 5. horizontal frame; 6. vertical frame; 7. omega connector; 8. measuring device connecting wire; 9. compensation wire; 10. fixing screw. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0033] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0034] According to an embodiment of the present invention, Figure 1 As shown, the present invention provides a connection structure of a compensation wire for a heating furnace, the connection structure includes a compensation wire, the compensation wire is connected between a thermocouple 2 and a measuring device, the thermocouple 2 is arranged in the heating furnace, the thermocouple 2 is used to measure the temperature in the heating furnace, the compensation wire includes a thermocouple connection end, the thermocouple connection end is connected to an end of the thermocouple 2 extending out of the heating furnace, a compensation wire joint is arranged at an end of the compensation wire away from the thermocouple 2, the thermocouple connection end is connected to an end of the thermocouple 2 extending out of the heating furnace, and a heat insulation layer is arranged between the thermocouple connection end and the heating furnace, so as to minimize the influence of the heat radiation of the heating furnace on the compensation wire to ensure the accuracy of temperature measurement.

[0035] Furthermore, the thermal insulation layer is arranged on the outer furnace wall of the heating furnace. Specifically, the thermal insulation layer in this embodiment is a ceramic fiber blanket 3 arranged on the furnace roof 1 of the annular heating furnace. The ceramic fiber blanket 3 is provided with three layers. The length and width of a single ceramic fiber blanket 3 are 300mm×300mm, and the thickness is 200mm. The arrangement of multiple layers of ceramic fiber blankets 3 can ensure the isolation effect of the thermal radiation of the annular heating furnace and compensate the wire from being affected by the thermal radiation of the heating furnace; and when the ceramic fiber blanket is damaged, the ceramic fiber blanket can be easily replaced.

[0036] The cold end of the thermocouple 2 passes through the furnace roof 1 and the three-layer ceramic fiber blanket 3 of the annular heating furnace, and the compensation wire is pressed to the cold end of the thermocouple 2 by a fixing screw. A protective cover is provided at the connection between the thermocouple 2 and the compensation wire to prevent dust from entering and avoiding dust from affecting the connection between the compensation wire and the thermocouple and causing a short circuit.

[0037] Furthermore, the connection between the compensation wire and the thermocouple 2 is covered with a heat-insulating sleeve 4, which is made of asbestos with good heat-insulating properties. The heat-insulating sleeve 4 mainly protects the compensation wire between the thermocouple 2 and the cross frame 5 to reduce the influence of the heat radiation of the heating furnace on the compensation wire and ensure normal temperature measurement. In other embodiments, the heat-insulating sleeve 4 can also be made of other refractory materials, such as ceramic fiber.

[0038] Furthermore, one end of the compensation wire equipped with the omega connector 7 is located in the middle of the space enclosed by the annular heating furnace. Since the middle of the space enclosed by the annular heating furnace is far away from the high-temperature part of the annular heating furnace, its temperature is relatively low, thereby better avoiding the omega connector 7 from being burned, better preventing the occurrence of short circuit or open circuit, thereby ensuring that the measurement result is not affected. Moreover, even if one end of the compensation wire equipped with the omega connector 7 fails, since the fault point is far away from the annular heating furnace and the temperature is low, the maintenance operation is convenient and the risk of high-temperature burns and heatstroke of maintenance personnel is reduced, thereby ensuring the personal safety of maintenance personnel.

[0039] Furthermore, the connection structure also includes a support frame, and the compensation wire is arranged on the support frame. The support frame includes a horizontal frame 5 and a vertical frame 6 arranged in an L shape. The end of the compensation wire connected to the thermocouple 2 is located on the horizontal frame 5, and the end of the compensation wire away from the thermocouple 2 is located on the vertical frame 6. The support frame in this embodiment is welded and fixed to the angle steel, and the angle steel plays a supporting and fixing role for the entire support frame. The distance between the horizontal frame 5 in the support frame and the furnace top 1 is greater than or equal to 1000mm, so that the compensation wire on the horizontal frame 5 is as far away from the annular heating furnace as possible to reduce the influence of the heat radiation of the heating furnace on the compensation wire; and the vertical frame 6 is located in the inner ring of the annular heating furnace, and the inner ring of the annular heating furnace is in a relatively low temperature position, which ensures that the compensation wire in the vertical frame 6 is in a more suitable temperature environment, thereby reducing the influence of the heat radiation of the annular heating furnace on the compensation wire.

[0040] Furthermore, the compensation wire joint is an omega joint 7, and the model of the omega joint 7 is HMPW-NM / F; the omega joint 7 is plugged into the adapter joint provided on the measuring device connecting wire 8, and the measuring device connecting wire 8 is connected to the measuring device, and is used to transmit the data measured by the thermocouple 2 to the measuring device. The use of the omega joint can realize the quick plug-in and pull-out of the adapter joint, facilitate the connection between the compensation wire and the measuring instrument, and facilitate the temperature measurement and the point test of the temperature measurement system. Further, if Figure 2 As shown, the fixing screw 10 presses and fixes the compensation wire 9 to the cold end of the thermocouple 2.

[0041] Furthermore, if Figure 2 As shown, a protective structure is arranged on the periphery of the fixing screw 10, and the protective structure includes a base 21 and a protective cover 22. The base 21 is fixedly arranged on the cold end of the thermocouple 2; the protective cover 22 is threadedly connected with the base 21. The protective cover 22 is hemispherical and made of alloy steel, and its specific model is 1Cr18Ni9.

[0042] After the fixing screw 10 presses and fixes the compensation wire 9 to the cold end of the thermocouple 2, the protective cover 22 covers the periphery of the fixing screw 10, and the protective cover 22 is threadedly connected to the base 21, thereby sealing the connection between the thermocouple 2 and the compensation wire 9 to prevent dust from entering and affecting the connection between the thermocouple and the compensation wire 9 and causing a short circuit; and after the protective cover 22 and the base 21 are fixed together, the two are no longer opened, thereby avoiding frequent removal of the screws to cause the connection between the thermocouple 2 and the compensation wire 9 to become loose.

[0043] In summary, in a specific solution of a connection structure of a compensation conductor in a heating furnace provided by the present invention:

[0044] (1) An insulation layer is provided between the compensation wire and the thermocouple in the heating furnace to minimize the influence of the heat radiation of the heating furnace on the compensation wire, so as to avoid premature aging of the compensation wire and affect the thermoelectric characteristics, thereby ensuring the accuracy of temperature measurement.

[0045] (2) The compensation wire leads the compensation wire joint to the inner ring of the annular heating furnace. The temperature in the inner ring of the annular heating furnace is relatively low, so the compensation wire joint is prevented from being burned out due to being too close to the annular heating furnace, resulting in a short circuit or open circuit, thereby ensuring that the measurement result is not affected; and the fault point at the joint connection position is set away from the heating furnace, reducing the safety risks of maintenance personnel being burned by high temperature, heatstroke, etc., and ensuring the personal safety of maintenance personnel; and a compensation wire joint is set at the end of the compensation wire away from the thermocouple, thereby extending the fault point to the compensation wire joint, and only plugging and unplugging operations need to be performed at the compensation wire joint, thereby reducing the disassembly work at the connection between the cold end of the thermocouple and the compensation wire, ensuring that the connection between the thermocouple and the compensation wire is securely fastened and not loose.

[0046] (3) The distance between the cross frame in the support frame supporting the compensating wire and the furnace top is greater than the thickness of the insulation layer, so that the compensating wire on the cross frame is as far away from the annular heating furnace as possible, thereby reducing the heat radiation effect of the annular heating furnace on the compensating wire.

[0047] (4) A heat-insulating sleeve is arranged around the connection between the compensation wire and the thermocouple, so as to protect the portion of the compensation wire close to the annular heating furnace.

[0048] (5) After the fixing screws press and fix the compensation wire to the cold end of the thermocouple, the protective cover covers the periphery of the fixing screws, and the protective cover is threadedly connected to the base, thereby sealing the connection between the thermocouple and the compensation wire to prevent dust from entering and affecting the connection between the thermocouple and the compensation wire and causing a short circuit; and after the protective cover and the base are fixed together, the two are no longer opened, thereby avoiding frequent removal of the screws and causing the connection between the thermocouple and the compensation wire to become loose.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A connection structure for a compensation wire in a heating furnace, the connection structure comprising a compensation wire, the compensation wire being connected between a thermocouple and a measuring device, the thermocouple being arranged in the heating furnace, and the thermocouple being used to measure the temperature in the heating furnace; It is characterized in that The compensation wire comprises a thermocouple connection end, the thermocouple connection end is connected to one end of the thermocouple extending out of the heating furnace, and a heat insulation layer is arranged between the thermocouple connection end and the heating furnace; the heat insulation layer is arranged on the outer furnace wall of the heating furnace; the heat insulation layer is a ceramic fiber blanket, and the thermocouple passes through the ceramic fiber blanket and is connected to the compensation wire; The heating furnace is an annular heating furnace, and a compensation wire joint is provided at one end of the compensation wire away from the thermocouple, and the compensation wire joint is located in the middle of the space surrounded by the annular heating furnace; The connection structure further comprises a support frame, the compensation wire is arranged on the support frame, and the support frame comprises a horizontal frame and a vertical frame arranged in an L shape; One end of the compensation wire connected to the thermocouple is located on the horizontal frame; One end of the compensation wire away from the thermocouple is located on the vertical frame; The distance between the horizontal frame and the furnace top of the annular heating furnace is greater than or equal to 1000 mm, and the vertical frame is located in the middle of the space enclosed by the annular heating furnace; The connection between the compensation wire and the thermocouple is covered with a heat-insulating sleeve, and the heat-insulating sleeve is used to protect the compensation wire located between the thermocouple and the cross frame.

2. The connection structure of the compensation conductor used in the heating furnace according to claim 1, characterized in that: The heat insulating sleeve is made of asbestos.

3. The connection structure of the compensation conductor used in the heating furnace according to any one of claims 1 to 2, characterized in that: The compensation wire is fixed to the cold end of the thermocouple by means of a fixing screw.

4. The connection structure of the compensation conductor used in the heating furnace according to claim 3, characterized in that: A protective structure is arranged around the fixing screw; The protection structure comprises a base and a protection cover, the base is fixedly arranged on the cold end of the thermocouple, and the protection cover and the base are detachably connected together.

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