Portable temperature measuring device for heating furnace

Abstract

The invention discloses a portable heating furnace temperature measuring device, and relates to the technical field of tool equipment, the portable heating furnace temperature measuring device comprises an umbrella-shaped temperature measuring support and a temperature acquisition system, the umbrella-shaped temperature measuring support can be freely folded and unfolded, the umbrella-shaped temperature measuring support is fixed in a heating furnace to keep an unfolded state during furnace temperature uniformity detection, and the temperature acquisition system is connected with the umbrella-shaped temperature measuring support. And the temperature acquisition system is used for fixedly arranging the temperature sensor, and is connected with the temperature sensor. After the umbrella-shaped temperature measuring support is unfolded, the sensors on the connecting rods can reach the temperature measuring points respectively, the temperature measuring support is convenient and fast to unfold, furnace temperature uniformity measurement can be smoothly completed under the condition that a large amount of manpower is not consumed, the workload and test installation time are greatly reduced, and test problems are reduced.

Description

Technical Field

[0001] This application relates to the technical field of tooling equipment, and particularly to a portable temperature measuring device for a heating furnace. Background Art

[0002] The uniformity of furnace temperature is crucial for the heat treatment of workpieces. For the traditional detection of the uniformity of the temperature in a heating furnace, due to the large space inside the furnace, it is relatively difficult to arrange temperature measurement points in the air inside the furnace. The temperature measurement points arranged in the air inside the furnace may have their positions deviated due to the vibration of the furnace body or the influence of the circulating air inside the furnace, resulting in inaccurate temperature measurement in the area. Summary of the Invention

[0003] The main purpose of this application is to provide a portable temperature measuring device for a heating furnace, aiming to solve the problems that it is not convenient to arrange temperature measurement points in the air inside the furnace and the position of the temperature measurement area of the sensor is likely to deviate due to factors such as the vibration of the furnace body during the measurement of the furnace temperature uniformity.

[0004] The technical solution adopted in this application is as follows:

[0005] A portable temperature measuring device for a heating furnace, comprising:

[0006] An umbrella-shaped temperature measuring bracket, which can be freely unfolded and folded, and the umbrella-shaped temperature measuring bracket is fixed inside the heating furnace to keep it in an unfolded state during the detection of the furnace temperature uniformity for fixedly arranging temperature sensors;

[0007] A temperature acquisition system, which is connected to the temperature sensor.

[0008] Optionally, the umbrella-shaped temperature measuring bracket includes:

[0009] A support rod, which is vertically installed inside the heating furnace;

[0010] A lower bracket, a middle bracket and an upper bracket, which are arranged at intervals on the support rod from bottom to top, and all are unfolded and folded with the support rod as a fulcrum.

[0011] Optionally, the lower bracket includes a pair of lower bracket main arms hinged at the same position on the support rod, and the lower bracket main arms rotate around the hinge point to realize unfolding and folding.

[0012] Optionally, the middle bracket includes a pair of middle bracket main arms hinged at the same position on the support rod, and the middle bracket main arms rotate around the hinge point to realize unfolding and folding. A number of middle bracket auxiliary arms perpendicular to the middle bracket main arms are also arranged on the middle bracket main arms.

[0013] Optionally, the upper bracket includes a pair of main arms of the upper bracket hinged at the same position of the support rod. The main arms of the upper bracket rotate around the hinge point to achieve expansion and retraction, and a number of auxiliary arms of the upper bracket perpendicular to them are provided on the main arms of the upper bracket.

[0014] Optionally, a lifting guide rail is provided on the support rod, and an expansion adjustment mechanism for expanding and retracting the upper bracket and the middle bracket is provided on the lifting guide rail.

[0015] Optionally, the expansion adjustment mechanism includes:

[0016] A lifting slide seat that slides along the lifting guide rail and can be locked at any position on the lifting guide rail;

[0017] A support rod of the upper bracket, one end of which is movably hinged to the lifting slide seat and the other end is movably hinged to the main arm of the upper bracket;

[0018] A support rod of the middle bracket, one end of which is movably hinged to the lifting slide seat and the other end is movably hinged to the main arm of the middle bracket.

[0019] Optionally, a number of pin holes are provided along the lifting guide rail, and a locking pin that can be screwed into the pin holes is provided on the lifting slide seat.

[0020] Optionally, the temperature acquisition system includes a front-end acquisition device and a back-end data processing device. The front-end acquisition device includes a front-end temperature information processing unit and a front-end LCD display screen.

[0021] Optionally, the portable temperature measuring device for the heating furnace further includes an accessory carrier for carrying test instruments for detecting the temperature uniformity of the heating furnace.

[0022] Optionally, the accessory carrier includes:

[0023] A transfer trolley with a bracket base for fixing the umbrella-shaped temperature measuring bracket provided thereon;

[0024] An accessory cabinet fixed to the transfer trolley, and at least two storage drawers are provided in the accessory cabinet.

[0025] Compared with the prior art, the beneficial effects of the present application are:

[0026] A temperature measuring device for a portable heating furnace proposed in this application includes an umbrella-shaped temperature measuring bracket and a temperature acquisition system. The umbrella-shaped temperature measuring bracket can be freely unfolded and retracted, and when performing the furnace temperature uniformity detection, the umbrella-shaped temperature measuring bracket is fixed in the heating furnace and kept in the unfolded state to be used for fixedly arranging temperature sensors. The temperature acquisition system is connected to the temperature sensors. It can be seen that by setting the umbrella-shaped temperature measuring bracket, the temperature sensors can be arranged on the bracket after unfolding to reach each temperature measurement point, ensuring the smooth completion of the furnace temperature uniformity measurement without consuming a large amount of manpower, greatly reducing the workload and the test installation time. At the same time, the bracket provides a fulcrum for the temperature sensors, avoiding the temperature sensors from hanging in the air and reducing the problem that the position of the temperature sensors is deviated due to the vibration of the furnace body or the blowing of the circulating air in the furnace, resulting in inaccurate regional temperature measurement, and realizing the uniformity detection of the furnace temperature in cooperation with the temperature acquisition system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 FIG. is a schematic structural diagram of the temperature measuring device for a portable heating furnace provided by an embodiment of this application;

[0028] Figure 2 FIG. is a schematic structural diagram of a fitting carrier;

[0029] Figure 3 FIG. is an unfolded schematic of the umbrella-shaped temperature measuring bracket Figure 1 ;

[0030] Figure 4 FIG. is Figure 3 an enlarged view of part A in FIG.

[0031] Figure 5 FIG. is an unfolded schematic of the umbrella-shaped temperature measuring bracket Figure 2 ;

[0032] Figure 6 FIG. is Figure 5 an enlarged view of part B in FIG.

[0033] Figure 7 FIG. is a system block diagram of the temperature acquisition system;

[0034] Figure 8 FIG. is a schematic structural diagram of a front-end acquisition device;

[0035] Figure 9 FIG. is a running logic block diagram of the temperature acquisition system;

[0036] Figure 10 FIG. is a layout schematic of the umbrella-shaped temperature measuring bracket in the heating furnace;

[0037] Figure 11 FIG. is a schematic working state diagram of the temperature measuring device for a portable heating furnace provided by an embodiment of this application.

[0038] Description of the reference numerals in the drawings:

[0039] 1- accessory carrier, 2- umbrella-shaped temperature measuring bracket, 3- front-end acquisition equipment, 101- transfer trolley, 102- cabinet surface slot; 103- temperature sensor and conductive wire group storage cabinet, 104- power supply hose reel storage cabinet, 111- roller, 112- stainless steel push rod, 113- bracket base, 201- upper bracket, 202- middle bracket, 203- lower bracket, 204- lifting slide, 205- support rod, 206- lifting guide rail, 207- locking pin, 208- upper bracket support rod, 209- middle bracket auxiliary arm, 210- upper bracket auxiliary arm, 211- middle bracket support rod, 301- front-end LCD display, 302- front-end temperature information processing unit. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] In addition, if the embodiments of the present application involve descriptions such as "first" and "second", the descriptions of "first", "second", etc. are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or inability to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0044] Referring to the atta Figure 1 As shown, the embodiment of the present application provides a portable temperature measuring device for a heating furnace, including an umbrella-shaped temperature measuring bracket 2 and a temperature acquisition system. The umbrella-shaped temperature measuring bracket 2 can be freely retracted and extended, and the umbrella-shaped temperature measuring bracket 2 is fixed in the heating furnace and kept in an extended state during the detection of the temperature uniformity of the furnace temperature for fixedly arranging temperature sensors. In the working state, the umbrella-shaped temperature measuring bracket 2 is in an extended state so that the temperature sensors can be distributed in different areas of the heating furnace for temperature measurement, rather than one-sidedly using the temperature of a certain area as the furnace temperature, thereby improving the accuracy of the detection of the overall furnace temperature uniformity. In the non-working state, the umbrella-shaped temperature measuring bracket 2 is in a retracted state to facilitate the storage and transportation of the umbrella-shaped temperature measuring bracket 2. The temperature acquisition system is connected to the temperature sensors, and the temperature sensors transmit the monitored temperature signals to the temperature acquisition system to achieve the automatic acquisition and control of the furnace temperature.

[0045] When large-component products need to be heat-treated after assembly, large-size heating equipment is usually used for heat treatment. The heat treatment process requires heating the parts in a heating furnace to the required temperature, so that the center of the parts also reaches the corresponding temperature and is maintained for a certain period of time. It is required that the temperature measured by the equipment temperature sensor should be the true temperature of the parts. Only when the heat exchange process among the measured medium, parts, and temperature sensors reaches a complete dynamic balance can the temperature detected by the temperature sensor represent the temperature of the parts.

[0046] However, due to the complexity of heat transfer between temperatures and factors such as hysteresis in temperature measuring elements and other links, in actual furnace temperature measurement, the temperature measured by the temperature sensor is only the local temperature in the furnace rather than the true temperature of the parts. Especially when there is a large temperature gradient in the furnace, the difference between the two is significant. This requires that the temperature distribution everywhere in the furnace must be uniform. However, due to the furnace body structure and the arrangement of heating elements, the actual temperature distribution in the heat treatment furnace is non-uniform. When using a temperature sensor equipped with a display instrument to detect the furnace temperature, only the local temperature in the furnace (the temperature near the working end of the temperature sensor) is measured and controlled, while the heat treatment process requires the temperature of a certain working space, and it is required that the temperature distribution in the working space is uniform and can be maintained stable for a long time. Under the condition of controlling and measuring the local temperature, in order to determine the size and position of the furnace space, it is necessary to measure the uniformity of the temperature of the entire furnace chamber of the heat treatment furnace.

[0047] The furnace temperature uniformity test can not only determine the effective use area of the furnace, but also timely understand the problems existing in the non-uniformity of the furnace insulation layer or the layout of heating wires. In practice, insufficient attention is paid to the furnace temperature uniformity measurement. This work is rarely carried out for newly purchased and overhauled furnaces, and even less for long-term used heat treatment furnaces. This is one of the main reasons for the unstable quality of heat treatment products, resulting in overburning or insufficient heating of products sometimes, leaving quality hidden dangers. Therefore, for products with strict quality requirements, it is very necessary to regularly measure the furnace temperature uniformity.

[0048] It can be found that a portable temperature measuring device for a heating furnace provided by an embodiment of the present application includes an umbrella-shaped temperature measuring bracket 2 and a temperature acquisition system. The umbrella-shaped temperature measuring bracket 2 can be freely retracted and expanded, and the umbrella-shaped temperature measuring bracket 2 is fixed in the heating furnace and kept in an expanded state during the furnace temperature uniformity detection for fixing and arranging temperature sensors. The temperature acquisition system is connected to the temperature sensors, and the temperature sensors transmit the monitored temperature signals to the temperature acquisition system to realize the automatic acquisition and control of the furnace temperature. It is not difficult to find that during the furnace temperature uniformity detection, the umbrella-shaped temperature measuring bracket 2 in an expanded state is placed in the heating furnace, and the temperature sensors are arranged using the rods of the umbrella-shaped temperature measuring bracket 2. Supported by the umbrella-shaped temperature measuring bracket 2, the temperature sensors can not only be distributed in different areas of the heating furnace to measure the temperature of different areas, eliminating the one-sided use of the temperature of a certain area as the furnace temperature, and striving to achieve the true detection of the real uniform furnace temperature. At the same time, the umbrella-shaped temperature measuring bracket 2 can also ensure the installation stability of the temperature sensors, so that even if the furnace body vibrates or is disturbed by the heated circulating air, the position of the temperature sensors will not deviate, thereby ensuring that the temperature sensors always measure the temperature of the specified area, and thus ensuring the accuracy of temperature measurement.

[0049] As an embodiment, as described above Figures 3 to 6As shown in the figure, the umbrella-shaped temperature measuring support 2 includes a support rod 205, a lower support 203, a middle support 202 and an upper support 201. A support plate is welded to the bottom of the support rod 205. The support plate is provided with bolt holes. Bolts are inserted into the bolt holes, so that the support rod 205 is installed in the heating furnace through the bolts. The lower support 203, the middle support 202 and the upper support 201 are arranged on the support rod 205 at intervals from bottom to top, and all expand and fold with the support rod 205 as the fulcrum. It can be understood that by hierarchically arranging the lower support 203, the middle support 202 and the upper support 201 on the support frame, and the lower support 203, the middle support 202 and the upper support 201 can all be expanded, so as to realize temperature detection at different heights and different positions at the same height, covering different areas in the heating furnace, in order to strive for the rationality of the furnace temperature uniformity detection.

[0050] Continuing, specifically, as Figures 3 to 6 shown, the lower support 203 includes a pair of lower support main arms. The adjacent ends of the lower support main arms are jointly rotatably sleeved on a short threaded shaft fixed on the support rod 205. At the same time, a fastening nut is sleeved on the short threaded shaft. Therefore, it is not difficult to imagine that by loosening the fastening nut, the two lower support main arms can be rotated around the short threaded shaft, so as to realize the expansion and folding of the lower support main arms. In the expanded or folded state, the lower support main arms can be kept in the expanded or folded state by tightening the fastening nut.

[0051] Also as shown in FIGS. 3 to Figure 6 shown, the middle support 202 includes a pair of middle support main arms. The adjacent ends of the middle support main arms are also movably hinged at the same position in the middle of the support rod 205. A number of middle support auxiliary arms perpendicular to the middle support main arms are arranged on the middle support main arms. Similarly, the upper support 201 includes a pair of upper support main arms. The adjacent ends of the upper support main arms are also movably hinged at the same position at the top of the support rod 205. A number of upper support auxiliary arms perpendicular to the upper support main arms are arranged on the upper support main arms. The arrangements of the middle support auxiliary arms and the upper support auxiliary arms are both for obtaining temperature detection in different areas.

[0052] In one embodiment, the middle support auxiliary arms and the upper support auxiliary arms are both installed on the corresponding support main arms in the same way. Specifically, longitudinal through grooves are provided at the positions of the middle support main arms and the upper support main arms corresponding to the installation of the auxiliary arms. Convex ribs are arranged in the grooves. One end of the middle support auxiliary arm and the upper support auxiliary arm is provided with a U-shaped clamping groove matching with the convex ribs. The U-shaped clamping groove clamps the convex ribs. At the same time, a shaft rod penetrates through the U-shaped clamping groove and the convex ribs, so that the middle support auxiliary arm and the upper support auxiliary arm can rotate around the shaft rod. Locking nuts are arranged at both ends of the shaft rod. By screwing the locking nuts towards the middle, the middle support auxiliary arm and the upper support auxiliary arm can be locked on the support main arm. With this structure, the middle support auxiliary arm and the upper support auxiliary arm can be rotated on the corresponding main arm to expand and fold.

[0053] In the above, to realize the unfolding and folding of the middle support 202 and the upper support 201, as Figures 3 to 6 shown, a lifting guide rail 206 is fixedly arranged along the support rod 205 in a close-fitting manner, and an unfolding adjustment mechanism for unfolding and folding the upper support 201 and the middle support 202 is arranged on the lifting guide rail 206. Specifically, the unfolding adjustment mechanism includes a lifting slide seat 204, an upper support strut 208 and a middle support strut 211. Among them, the lifting slide seat 204 slides along the lifting guide rail 206 and can be locked at any position of the lifting guide rail 206. One end of the upper support strut 208 is movably hinged to the lifting slide seat 204, and the other end is movably hinged to the main arm of the upper support; one end of the middle support 202 strut is movably hinged to the lifting slide seat 204, and the other end is movably hinged to the main arm of the middle support, thereby forming an unfolding and folding structure like an umbrella, so as to realize the synchronous unfolding and folding of the middle support 202 and the upper support 201.

[0054] Of course, in one embodiment, in order to keep the unfolded and folded middle support 202 and the upper support 201 in a stable state, a number of pin holes are arranged along the lifting guide rail 206, a locking pin 207 is arranged on the lifting slide seat 204, and the up and down movement of the lifting slide seat 204 unfolds or folds the main arm of the support through the support strut, and the position of the lifting slide seat 204 is fixed by inserting the locking pin 207 into the pin hole, so that the middle support 202 and the upper support 201 are kept in a stable state.

[0055] In the above, a number of bolt holes and mounting holes are arranged on the main arm of the upper support, the auxiliary arm of the upper support, the main arm of the middle support, the auxiliary arm of the middle support and the main arm of the lower support for fixing the temperature sensor and the wire group.

[0056] In this embodiment, as Figures 7 to 9 shown, the temperature acquisition system includes a front-end acquisition device 3 and a back-end data processing device. The front-end acquisition device 3 includes a front-end temperature information processing unit 302 and a front-end LCD display screen 301. The temperature data measured by the temperature sensor is transmitted to the front-end temperature information processing unit 302 to realize the acquisition function of each measurement point and is displayed on the front-end LCD display screen 301 for the current furnace temperature information display function. The data interaction between the front-end and back-end devices is realized through the industrial Ethernet for its transmission function, and the real-time display of temperature data and the temperature uniformity analysis function are realized through the back-end data processing device.

[0057] In a preferred embodiment, to facilitate transporting the test instrument to the heating furnace for testing, as Figure 1 shown, the portable heating furnace temperature measuring device further includes a fitting carrier 1. The fitting carrier 1 is used to transport the test instrument, and the test instrument is used for detecting the temperature uniformity of the heating furnace.

[0058] Specifically, as Figure 2As shown, the accessory carrier 1 includes a transfer trolley 101. A bracket base 113 for fixing the umbrella-shaped temperature measuring bracket 2 is provided on the transfer trolley 101. The bracket base 113 is bolted to the support plate. The transfer trolley 101 is equipped with four rollers 111. An accessory cabinet is fixed on the transfer trolley 101. Stainless steel push rods 112 are provided on both sides of the accessory cabinet to facilitate pushing the transfer trolley 101. A cabinet surface card slot 102 for placing the front-end acquisition device 3 is provided on the top of the accessory cabinet. The accessory cabinet is provided with at least two storage drawer cabinets, namely a temperature sensor and wire group storage cabinet 103 and a power supply reel storage cabinet 104. The temperature sensor and wire group storage cabinet 103 is provided with a temperature sensor card slot and a wire group card slot. The temperature sensor and wire group storage cabinet 103 is provided with regional partition physical isolation and is locked with a padlock. The temperature sensor and wire group storage cabinet 103 is provided with a built-in power cord reel to supply power to all the tested instruments.

[0059] In summary, for a portable heating furnace temperature measuring device provided by an embodiment of the present application, its working process is as follows:

[0060] When measuring the temperature of the heating furnace, use the accessory carrier 1 to transport the umbrella-shaped temperature measuring bracket 2 and related test instruments to the side of the heating furnace. Place the transfer trolley 101 at the designated position of the heating furnace, and place the umbrella-shaped temperature measuring bracket 2 at the designated temperature measuring position inside the heating furnace (as Figure 10 shown). Manually operate the upper bracket 201, the middle bracket 202, and the lower bracket 203 of the three-part bracket to unfold, so that each arm reaches the temperature measuring point. At the same time, the bracket has a locking structure, so that the arm can reach a specific angle to complete the temperature measurement. Place the front-end acquisition device 3 on the cabinet surface of the accessory cabinet. Take out the sensor wire from the temperature sensor and wire group storage cabinet 103 and connect it to the temperature measuring point of the unfolded bracket of the umbrella-shaped temperature measuring bracket 2 in the heating furnace according to Figure 11 shown. After the instrument collects the temperature data of the temperature measuring point, it generates a report on the spatial distribution characteristics, time distribution characteristics, and temperature fluctuation magnitude of the temperature, and prints it.

[0061] It can be seen that a temperature measuring device for a portable heating furnace proposed in an embodiment of the present application selects a material with a relatively light weight to make a shape of a telescopic umbrella rack according to the position and spatial size of the sensor inside the furnace. The thermocouple wire passes through the inside of the umbrella rack and is numbered. The thermocouple wire is installed inside the device and is less affected by the environment. By setting up an umbrella-shaped temperature measuring bracket, the temperature sensors can be arranged on the bracket after being unfolded and reach each temperature measuring point respectively, eliminating the one-sided use of the temperature in a certain area as the temperature inside the furnace, and striving to achieve the true detection of the real and uniform furnace temperature. At the same time, the umbrella-shaped temperature measuring bracket can also ensure the installation stability of the temperature sensors. In this way, even if the furnace body vibrates or is disturbed by the heated circulating air, the positions of the temperature sensors will not deviate, so as to ensure that the temperature sensors always measure the temperature of the designated area, thereby ensuring the accuracy of temperature measurement. Without consuming a large amount of manpower, the uniformity measurement of the furnace temperature can be successfully completed, greatly reducing the workload and the test installation time. At the same time, the bracket provides a fulcrum for the temperature sensors, avoiding the temperature sensors from being suspended, and reducing the problem that the position of the temperature sensors deviates due to the vibration of the furnace body or the blowing of the circulating air inside the furnace, resulting in inaccurate temperature measurement in the area. When paired with a temperature acquisition system, using FPGA as the control center, the temperature data at the acquisition end is dynamically displayed as temperature information on the backend data processing device in real time, intelligently correcting the temperature value error and completing the temperature uniformity measurement report at the measuring points, effectively improving the efficiency and accuracy of temperature acquisition, enabling automatic acquisition and control of temperature information, greatly improving the work efficiency and accuracy, facilitating the operator to conduct real-time control over the vulcanized products, and improving the product quality.

[0062] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A portable temperature measuring device for a heating furnace, characterized in that, Including: An umbrella-shaped temperature measuring support which can be freely retracted and extended, and which is fixed in the heating furnace in an extended state for furnace temperature uniformity detection to fixedly arrange temperature sensors; A temperature acquisition system which is connected to the temperature sensors.

2. The temperature measuring device of the portable heating furnace according to claim 1, wherein, The umbrella-shaped temperature measuring support includes: A support rod which is vertically installed in the heating furnace; A lower support, a middle support and an upper support which are arranged at intervals on the support rod from bottom to top and which are retracted and extended with the support rod as a fulcrum.

3. The portable temperature measuring device for a heating furnace according to claim 2, characterized in that, The lower support includes a pair of lower support main arms hinged at the same position on the support rod, and the lower support main arms rotate around the hinge points to achieve retraction and extension.

4. The portable heating furnace temperature measuring device according to claim 2, characterized in that, The middle support includes a pair of middle support main arms hinged at the same position on the support rod, and the middle support main arms rotate around the hinge points to achieve retraction and extension. A number of middle support auxiliary arms perpendicular to the middle support main arms are also arranged on the middle support main arms.

5. The temperature measuring device for the portable heating furnace according to claim 4, wherein, The upper support includes a pair of upper support main arms hinged at the same position on the support rod, and the upper support main arms rotate around the hinge points to achieve retraction and extension. A number of upper support auxiliary arms perpendicular to the upper support main arms are arranged on the upper support main arms.

6. The temperature measuring device of the portable heating furnace according to claim 5, characterized in that, A lifting guide rail is arranged on the support rod, and an unfolding adjustment mechanism for retracting and extending the upper support and the middle support is arranged on the lifting guide rail.

7. The temperature measuring device of the portable heating furnace according to claim 6, wherein, The unfolding adjustment mechanism includes: A lifting slide seat which slides along the lifting guide rail and can be locked at any position on the lifting guide rail; An upper support strut, one end of which is movably hinged to the lifting slide seat and the other end of which is movably hinged to the upper support main arm; A middle support strut, one end of which is movably hinged to the lifting slide seat and the other end of which is movably hinged to the middle support main arm.

8. The temperature measuring device for the portable heating furnace according to claim 7, wherein, A number of pin holes are arranged along the lifting guide rail, and a locking pin capable of being screwed into the pin holes is arranged on the lifting slide seat.

9. The temperature measuring device for the portable heating furnace according to claim 1, wherein, The temperature acquisition system includes a front-end acquisition device and a back-end data processing device, and the front-end acquisition device includes a front-end temperature information processing unit and a front-end LCD display screen.

10. The portable temperature measuring device for a heating furnace according to claim 1, characterized in that, It also includes an accessory carrier which is used to carry test instruments for furnace temperature uniformity detection of the heating furnace.

11. The temperature measuring device for the portable heating furnace according to claim 10, wherein, The accessory carrier includes: A transfer trolley on which a support base for fixing the umbrella-shaped temperature measuring support is arranged; An accessory cabinet which is fixed on the transfer trolley and which is provided with at least two storage drawers.

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