A protection device for a heating furnace thermocouple

Abstract

This utility model relates to a protection device for a thermocouple in a heating furnace. The furnace includes a furnace body, a furnace door, and a thermocouple. The furnace door is located on the furnace body, and the thermocouple is inserted into the inner wall of the furnace body. The protection device comprises a guide assembly, a cylinder, a furnace door switch sensor, and a PLC. The guide assembly is located on the outer surface of the furnace body and is connected to the thermocouple for guiding its extension and retraction. The cylinder is located on the guide assembly and is used to drive the thermocouple's extension and retraction. The furnace door switch sensor is located on the furnace door, and the PLC is located on the furnace body. The PLC is connected to both the furnace door switch sensor and the cylinder for real-time control of the cylinder's extension and retraction. Through the cooperation of the guide assembly, cylinder, furnace door switch sensor, and PLC, real-time control of the thermocouple's extension and retraction is achieved, preventing workpieces from colliding and damaging the thermocouple when the furnace door is opened for removal.

Description

Technical Field

[0001] This utility model relates to a protection device for a thermocouple in a heating furnace. Background Technology

[0002] Thermocouples are commonly used temperature-sensing elements in temperature measuring instruments. They directly measure temperature and convert the temperature signal into a thermoelectric potential signal, which is then converted into the temperature of the measured medium by an electrical instrument (secondary instrument). The shapes of various thermocouples often differ greatly depending on the application, but their basic structure is roughly the same. They typically consist of thermocouples, insulating sheaths, protective tubes, and junction boxes. They are usually used in conjunction with display instruments, recording instruments, and electronic controllers. When testing the inner liner of a heating furnace, they need to be placed against the inner liner. Currently, the most common installation method for thermocouples is to directly fix them to the inner wall of the heating furnace, with the sensing end extending into the furnace chamber for temperature measurement. Furthermore, the sensing end of the thermocouple is made of ceramic, which makes it easy for workpieces to collide and damage the thermocouple each time the furnace door is opened for removal. Additionally, thermocouples are expensive, resulting in losses for manufacturing companies. Utility Model Content

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0004] The technical problem this invention aims to solve is how to avoid damage to the thermocouple caused by the workpiece when the furnace door is opened for removal.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a protection device for a thermocouple in a heating furnace, wherein the heating furnace includes a furnace body, a furnace door, and a thermocouple. The furnace door is disposed on the furnace body, and the thermocouple is inserted into the inner wall of the furnace body. The protection device includes a guide assembly, a cylinder, a furnace door switch sensor, and a PLC. The guide assembly is disposed on the outer surface of the furnace body and is connected to the thermocouple for guiding the extension and retraction of the thermocouple. The cylinder is disposed on the guide assembly for driving the extension and retraction of the thermocouple. The furnace door switch sensor is disposed on the furnace door, and the PLC is disposed on the furnace body. The PLC is connected to both the furnace door switch sensor and the cylinder for real-time control of the extension and retraction of the cylinder. The PLC is a Siemens S7-1500:6ES7511-1AL03-0AB0 model, and the furnace door switch sensor is an Omron E2B-M30KS15-WZ-B1 2M model.

[0006] As a preferred embodiment of the protection device for the thermocouple of the heating furnace described in this utility model, the guide assembly includes a mounting base, a sliding member, a fixing member, and a connecting frame. The mounting base is fixedly disposed on the outer surface of the furnace body, the sliding member is disposed on the mounting base, the fixing member is disposed at the end of the sliding member away from the mounting base, the cylinder is disposed on the fixing member, the sliding member is connected to the thermocouple through the connecting frame, and the piston rod of the cylinder is fixedly connected to the connecting frame.

[0007] As a preferred embodiment of the protective device for the heating furnace thermocouple described in this utility model, the sliding member includes a guide rod and a sliding cylinder. One end of the guide rod is fixedly mounted on the mounting base, and the sliding cylinder is sleeved on the guide rod. One end of the connecting frame is fixedly mounted on the sliding cylinder, and the other end of the connecting frame is fixedly mounted on the thermocouple, so that the thermocouple can move linearly along the guide rod during the extension and retraction process, thereby preventing the thermocouple from bending during the extension and retraction process.

[0008] As a preferred embodiment of the protection device for the heating furnace thermocouple described in this utility model, the fixing component includes a fixing frame and a nut. A journal is provided at the end of the guide rod away from the mounting seat, and an external thread is provided on the outer surface of the journal. The fixing frame is fixedly mounted on the journal of the guide rod by the nut. The cylinder is fixedly mounted on the fixing frame so that the piston rod of the cylinder can directly drive the connecting frame to make horizontal linear movement, thereby improving the efficiency of thermocouple extension and retraction.

[0009] As a preferred embodiment of the protective device for the heating furnace thermocouple described in this utility model, a guide seat is fixedly provided on the outer surface of the furnace body, and the thermocouple passes through the guide seat to prevent the thermocouple from bending during the expansion and contraction process.

[0010] Beneficial effects:

[0011] 1. By cooperating with the guide assembly, cylinder, furnace door switch sensor and PLC, real-time control of thermocouple extension and retraction is achieved to avoid workpiece collision damage to thermocouple when the furnace door is opened for part removal;

[0012] 2. The use of a cylinder to directly drive the thermocouple to perform the telescopic motion not only improves the efficiency of telescopic movement but also simplifies the overall structure;

[0013] 3. The protection device uses a cylinder as the driving device. Compared with a linear servo motor, the cylinder is cheaper, thus reducing production costs. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0015] Figure 1 This is a schematic diagram of the overall structure of the protection device for the thermocouple of the heating furnace.

[0016] Figure 2 This is a schematic diagram showing the electrical connections of the furnace door switch sensor, PLC, and cylinder for the protection device of the thermocouple in the heating furnace.

[0017] In the diagram: 1. Furnace body; 2. Thermocouple; 3. Guide assembly; 31. Mounting base; 32. Sliding component; 321. Guide rod; 322. Slide cylinder; 33. Fixing component; 331. Fixing frame; 332. Nut; 34. Connecting frame; 4. Cylinder; 5. Furnace door switch sensor; 6. PLC; 7. Guide seat. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0020] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0021] Example

[0022] Reference Figure 1 and Figure 2This embodiment provides a protection device for a thermocouple in a heating furnace. The heating furnace includes a furnace body 1, a furnace door, and a thermocouple 2. The furnace door is disposed on the furnace body 1, and the thermocouple 2 is inserted into the inner wall of the furnace body 1. The protection device includes a guide assembly 3, a cylinder 4, a furnace door switch sensor 5, and a PLC 6. The guide assembly 3 is disposed on the outer surface of the furnace body 1 and is connected to the thermocouple 2 for guiding the extension and retraction of the thermocouple 2. The cylinder 4 is disposed on the guide assembly 3 for driving the extension and retraction of the thermocouple 2. The furnace door switch sensor 5 is disposed on the furnace door, and the PLC 6 is disposed on the furnace body 1. The PLC 6 is connected to both the furnace door switch sensor 5 and the cylinder 4 for real-time control of the extension and retraction of the cylinder 4.

[0023] The heating furnace in this embodiment mainly consists of a furnace body 1, a furnace door, and a thermocouple 2. It should be noted that the heating furnace also includes other components, all of which are existing technologies. The protection device in this embodiment mainly involves the relevant components of the aforementioned heating furnace. The furnace body 1 serves as the mounting base for the entire protection device. A furnace door (not shown in the attached drawings) is installed on the furnace body 1. The thermocouple 2 is inserted into the inner wall of the furnace body 1, allowing it to extend and retract horizontally. The protection device mainly consists of a guide assembly 3, a cylinder 4, a furnace door switch sensor 5, and a PLC 6. The guide assembly 3 is installed directly below the thermocouple 2 on the outer surface of the furnace body 1. The guide assembly 3 connects to the thermocouple 2... The thermocouple 2 is connected to the guide assembly 3, which guides the extension and retraction of the thermocouple 2 to ensure that it can extend and retract horizontally, thus preventing bending during the extension and retraction movement. A cylinder 4 is installed at the left end of the guide assembly 3, which can directly drive the extension and retraction of the thermocouple 2, improving the efficiency of extension and retraction and simplifying the overall structure. In addition, this embodiment uses a cylinder 4 as the driving device, which is cheaper than a linear servo motor, thus reducing production costs. A furnace door switch sensor 5 is installed on the furnace door. The furnace door switch sensor 5 is an Omron E2B-M30KS15-WZ-B1 sensor. A 2M model is used to detect the opening and closing of the furnace door in real time. A PLC6 is installed on the furnace body 1. The PLC6 is a Siemens S7-1500:6ES7511-1AL03-0AB0 model. The PLC6 is connected to the furnace door switch sensor 5 and the cylinder 4 to realize real-time control of the extension and retraction of the cylinder 4. In this embodiment, the guide assembly 3, the cylinder 4, the furnace door switch sensor 5 and the PLC6 cooperate to realize real-time control of the extension and retraction of the thermocouple 2, so as to avoid the workpiece from colliding and damaging the thermocouple 2 when the furnace door is opened for picking up the workpiece. It should be noted that this embodiment does not limit the specific number of thermocouples 2. Multiple thermocouples 2 can be installed on the heating furnace, and each thermocouple 2 can be equipped with a corresponding protection device. The PLC6 can control multiple cylinders 4 to extend and retract simultaneously.

[0024] Specifically, the guide assembly 3 includes a mounting base 31, a sliding member 32, a fixing member 33, and a connecting frame 34. The mounting base 31 is fixedly disposed on the outer surface of the furnace body 1. The sliding member 32 is disposed on the mounting base 31. The fixing member 33 is disposed at the end of the sliding member 32 away from the mounting base 31. The cylinder 4 is disposed on the fixing member 33. The sliding member 32 is connected to the thermocouple 2 through the connecting frame 34. The piston rod of the cylinder 4 is fixedly connected to the connecting frame 34.

[0025] In this embodiment, the guide assembly 3 mainly consists of a mounting base 31, a sliding member 32, a fixing member 33, and a connecting frame 34. The mounting base 31 is installed directly below the thermocouple 2 on the outer surface of the furnace body 1. The sliding member 32 is installed on the mounting base 31 to guide the thermocouple 2. A fixing frame 331 is installed on the right end of the sliding member 32. The cylinder 4 is fixedly installed on the fixing member 33, that is, the cylinder 4 is horizontally installed on the right end of the sliding member 32 through the fixing member 33 so as to directly drive the thermocouple 2 to extend and retract horizontally. A connecting frame 34 is installed on the sliding member 32. The top of the connecting frame 34 is fixedly connected to the end of the thermocouple 2 that extends out of the furnace body 1, and the bottom of the connecting frame 34 is fixedly connected to the piston rod of the cylinder 4. That is, the cylinder 4 is directly connected to the thermocouple 2 through the connecting frame 34. The connecting frame 34 is installed on the sliding member 32 so that the connecting frame 34 can move back and forth horizontally, thereby preventing the thermocouple 2 from bending during horizontal extension and retraction.

[0026] Specifically, the sliding member 32 includes a guide rod 321 and a slide cylinder 322. One end of the guide rod 321 is fixedly mounted on the mounting base 31, and the slide cylinder 322 is sleeved on the guide rod 321. One end of the connecting frame 34 is fixedly mounted on the slide cylinder 322, and the other end of the connecting frame 34 is fixedly mounted on the thermocouple 2.

[0027] In this embodiment, the sliding member 32 mainly consists of a guide rod 321 and a sliding cylinder 322. The guide rod 321 is symmetrically fixedly mounted on the mounting base 31, and the sliding cylinder 322 is fitted onto the guide rod 321 so that the sliding cylinder 322 can slide horizontally along the guide rod 321. The connecting frame 34 is fixedly mounted on the sliding cylinder 322 and can move horizontally along the guide rod 321. When the cylinder 4 drives the thermocouple 2 to extend or retract through the connecting frame 34, the thermocouple 2 can move linearly along the guide rod 321 during the extension or retraction process to avoid the thermocouple 2 bending during the extension or retraction process. It should be noted that this embodiment does not further limit the specific number of guide rods 321 and sliding cylinders 322.

[0028] Specifically, the fastener 33 includes a fixing bracket 331 and a nut 332. The end of the guide rod 321 away from the mounting base 31 is provided with a journal, and the outer surface of the journal is provided with an external thread. The fixing bracket 331 is fixedly mounted on the journal of the guide rod 321 by the nut 332. The cylinder 4 is fixedly mounted on the fixing bracket 331.

[0029] In this embodiment, the fixing member 33 mainly consists of a fixing frame 331 and a nut 332. A journal is machined at the end of the guide rod 321 away from the mounting base 31. The journal mates with the mounting hole on the fixing frame 331 so that the fixing frame 331 can be installed on the journal of the guide rod 321. An external thread is provided on the outer surface of the journal, which mates with the nut 332 so that the nut 332 can fix the fixing frame 331. During installation, the fixing frame 331 with the cylinder 4 can be fixedly installed on the left end of the guide rod 321 by the nut 332 so that the piston rod of the cylinder 4 can directly drive the connecting frame 34 to make horizontal linear movement. This not only improves the efficiency of the thermocouple 2's extension and retraction but also simplifies the overall structure of the protection device.

[0030] Furthermore, a guide seat 7 is fixedly installed on the outer surface of the furnace body 1, and the thermocouple 2 passes through the guide seat 7.

[0031] In this embodiment, a guide seat 7 is fixedly installed at the installation location of the thermocouple 2 on the outer surface of the furnace body 1. The right end (detection end) of the thermocouple 2 passes through the guide seat 7 and extends into the furnace body 1. When the thermocouple 2 moves in extension and retraction, the guide seat 7 can play a certain guiding role for the thermocouple 2, further preventing the thermocouple 2 from bending during the extension and retraction process.

[0032] In use, when the operator opens the furnace door to grab the workpiece, the furnace door switch sensor 5 detects that the furnace door is open. At this time, the furnace door switch sensor 5 transmits a signal to the PLC 6. After receiving the furnace door opening signal from the furnace door switch sensor 5, the PLC 6 controls the cylinder 4 to retract. The cylinder 4 drives the connecting frame 34 to move through the piston rod. The connecting frame 34 drives the thermocouple 2 to move horizontally to the left along the guide rod 321, that is, to realize the rapid horizontal movement of the thermocouple 2 out of the furnace body 1 until the measuring end of the thermocouple 2 moves into the inner wall of the furnace body 1, so as to avoid the workpiece colliding with and damaging the thermocouple 2 when the furnace door is opened to pick up the workpiece. After the operator finishes grabbing the workpiece and closes the furnace door, when the furnace door switch... When sensor 5 detects that the furnace door is completely closed, the furnace door switch sensor 5 transmits a signal to PLC 6. After receiving the furnace door closing signal from the furnace door switch sensor 5, PLC 6 controls cylinder 4 to expand. Cylinder 4 drives connecting frame 34 to move through piston rod. Connecting frame 34 drives thermocouple 2 to move horizontally to the right along guide rod 321, thus realizing the rapid horizontal movement of thermocouple 2 into furnace body 1 until the measuring end of thermocouple 2 extends into furnace body 1 to measure the temperature inside furnace body 1. This implementation achieves real-time control of the extension and retraction movement of thermocouple 2 through the cooperation between furnace door switch sensor 5, PLC 6 and cylinder 4, ensuring that it will not be damaged by collision during workpiece gripping.

[0033] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A protection device for a thermocouple in a heating furnace, wherein the heating furnace includes a furnace body (1), a furnace door, and a thermocouple (2), the furnace door being disposed on the furnace body (1), and the thermocouple (2) being inserted into the inner wall of the furnace body (1), characterized in that: The protection device includes a guide assembly (3), a cylinder (4), a furnace door switch sensor (5), and a PLC (6). The guide assembly (3) is disposed on the outer surface of the furnace body (1) and is connected to the thermocouple (2) for guiding the extension and retraction of the thermocouple (2). The cylinder (4) is disposed on the guide assembly (3) for driving the thermocouple (2) to extend and retract. The furnace door switch sensor (5) is disposed on the furnace door. The PLC (6) is disposed on the furnace body (1) and is connected to the furnace door switch sensor (5) and the cylinder (4) respectively for controlling the extension and retraction of the cylinder (4) in real time.

2. The protection device for the thermocouple of the heating furnace as described in claim 1, characterized in that: The guide assembly (3) includes a mounting base (31), a sliding member (32), a fixing member (33), and a connecting frame (34). The mounting base (31) is fixedly disposed on the outer surface of the furnace body (1). The sliding member (32) is disposed on the mounting base (31). The fixing member (33) is disposed at the end of the sliding member (32) away from the mounting base (31). The cylinder (4) is disposed on the fixing member (33). The sliding member (32) is connected to the thermocouple (2) through the connecting frame (34). The piston rod of the cylinder (4) is fixedly connected to the connecting frame (34).

3. The protection device for the thermocouple of the heating furnace as described in claim 2, characterized in that: The sliding member (32) includes a guide rod (321) and a slide cylinder (322). One end of the guide rod (321) is fixedly mounted on the mounting base (31), and the slide cylinder (322) is sleeved on the guide rod (321). One end of the connecting frame (34) is fixedly mounted on the slide cylinder (322), and the other end of the connecting frame (34) is fixedly mounted on the thermocouple (2).

4. The protection device for the thermocouple of the heating furnace as described in claim 3, characterized in that: The fastener (33) includes a fixing bracket (331) and a nut (332). The end of the guide rod (321) away from the mounting base (31) is provided with a journal. The outer surface of the journal is provided with an external thread. The fixing bracket (331) is fixedly mounted on the journal of the guide rod (321) by the nut (332). The cylinder (4) is fixedly mounted on the fixing bracket (331).

5. The protection device for the thermocouple of the heating furnace as described in claim 1, characterized in that: A guide seat (7) is fixedly installed on the outer surface of the furnace body (1), and the thermocouple (2) passes through the guide seat (7).

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