PLC-control-based shape-preserving quenching automatic heating furnace oxygen feeding device

Abstract

The utility model relates to the technical field of heating furnaces, and discloses a PLC-control-based shape-maintaining quenching automatic heating furnace oxygen introducing device which comprises a furnace body, a heating pipe, an oxygen probe, a main path oxygen supply pipeline, a branch path oxygen supply pipeline, an electromagnetic valve, a furnace door and a driving part. In the using process, the driving piece is controlled to work, and the furnace door can open or close the heating chamber. When the heating chamber is in a closed state, the workpiece loaded on the tray can be heated. When the heating pipe continuously generates heat to heat the workpiece, the oxygen probe can detect the oxygen content in the heating chamber in real time. When the oxygen content is lower than a standard value, the electromagnetic valve is controlled to be switched on, and oxygen can be conveyed into the heating chamber through the main oxygen supply pipeline and the branch oxygen supply pipeline. And after oxygen is conveyed for a set time, the electromagnetic valve is controlled to be blocked, so that the exhausted oxygen in the heating chamber can be supplemented. The problem that heated workpieces are often unqualified due to the fact that the oxygen content in the heating furnace is too low is solved, and the qualification rate of the workpieces is increased.

Description

Technical Field

[0001] The present application relates to the technical field of heating furnaces, for example, to an oxygen supply device for an automated heating furnace for shape-preserving quenching based on PLC control. Background Art

[0002] At present, the hot forming process of ultra-high strength steel plate is to heat the high strength steel plate to the austenite temperature range, and after the structure of the steel plate is completely changed, it is quickly moved to the mold, and quickly stamped. Under the pressure holding state of the press, the parts are quenched and cooled through the cooling circuit arranged in the mold and a certain cooling speed is guaranteed. Finally, a new type of hot pressing forming process of ultra-high strength stamping parts is obtained, and a heating furnace is required in this process. A heating furnace for quickly entering and exiting workpieces is disclosed in the related art (publication number: CN111575469A), including a base frame. A furnace body is fixed on the base frame, and the side of the furnace body has a furnace mouth. A furnace door that can close the furnace mouth is arranged on the base frame. Both ends of the furnace door are connected to an opening and closing structure that can open or close it. A heating structure is arranged on the furnace body, and a plurality of tracks are installed in the furnace body. Trays for placing workpieces are arranged on the tracks through a plurality of rolling assemblies.

[0003] In the process of implementing the above embodiments, it is found that there are at least the following problems in the related art:

[0004] During use, the tray can be quickly pushed into the furnace body and quickly taken out of the furnace body under the action of the rolling assembly, which has the advantage of rapid entry and exit of workpieces. Through the design of the opening and closing structure, the furnace door can be opened and closed, which has the advantage of high work efficiency. However, in actual application, the oxygen in the heating furnace is easily consumed, resulting in the workpiece after heating often failing due to too little oxygen content in the heating furnace.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0006] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0007] The disclosed embodiment provides an oxygen supply device for an automated heating furnace for conformal quenching based on PLC control to improve the qualification rate of workpieces.

[0008] In some embodiments, the oxygen supply device of the automated heating furnace for conformal quenching controlled by PLC comprises: a furnace body, which comprises a heating chamber; a heating tube, which is installed on the furnace body, and the heating end of the heating tube is located inside the heating chamber; an oxygen probe, which is installed on the furnace body, and the detection end of the oxygen probe is located inside the heating chamber; a main oxygen supply pipeline, which is installed on the furnace body and is used to be connected to the oxygen supply device; a branch oxygen supply pipeline, one end of which is connected to the main oxygen supply pipeline, and the other end of which is connected to the heating chamber; an electromagnetic valve, which is respectively installed on each of the branch oxygen supply pipelines and is respectively used to put each of the branch oxygen supply pipelines in a conducting or blocking state; a furnace door, which is movably arranged on the furnace body; a driving member, which is installed between the furnace body and the furnace door and is used to drive the furnace door to move relative to the furnace body; wherein, under the drive of the driving member, the furnace door opens or closes the heating chamber.

[0009] Optionally, the driving member includes: a first rocker arm, one end of which is rotatably connected to the furnace body, and the other end of which is rotatably connected to the furnace door; a second rocker arm, rotatably installed on the furnace body, and one end of which is rotatably connected to the furnace door; wherein the second rocker arm can be controlled to rotate to drive the furnace door to open or close the heating chamber.

[0010] Optionally, the driving member also includes: a rotating shaft, rotatably mounted on the furnace body; a third rocker arm, one end of the third rocker arm is connected to the rotating shaft; a connecting rod, both ends of the connecting rod are rotatably connected to the other end of the second rocker arm and the other end of the third rocker arm respectively; wherein the rotating shaft can be controlled to rotate to drive the second rocker arm to perform rotational motion.

[0011] Optionally, the driving member further includes: a motor installed on the furnace body; wherein the rotating shaft rotates under the drive of the motor.

[0012] Optionally, the driving member further includes: a driving gear mounted on the rotating end of the motor; a driven gear mounted on the rotating shaft and meshingly connected with the teeth of the driving gear; wherein the diameter of the driving gear is smaller than the diameter of the driven gear.

[0013] Optionally, the driving member further includes: a protective cover, which is installed on the furnace body and covers the outside of the driving gear and the driven gear; wherein the protective cover includes a notch, and the notch is used for passing the rotating end of the motor.

[0014] Optionally, it further includes: a support plate installed on the furnace body and located at the bottom of the heating chamber.

[0015] Optionally, it also includes: a flow meter installed on the main oxygen supply pipeline.

[0016] Optionally, it also includes: an electric control cabinet, which is electrically connected to the oxygen probe and each of the solenoid valves.

[0017] The oxygen supply device for the automatic heating furnace for shape-preserving quenching based on PLC control provided in the embodiments of the present disclosure can achieve the following technical effects:

[0018] The oxygen supply device of the automatic heating furnace for conformal quenching based on PLC control provided by the embodiment of the present disclosure includes a furnace body, a heating tube, an oxygen probe, a main oxygen supply pipeline, a branch oxygen supply pipeline, an electromagnetic valve, a furnace door and a driving member. The furnace body includes a heating chamber, and the heating chamber is used to heat the workpiece placed on the tray. The heating tube is installed on the furnace body, and the heating end of the heating tube is located inside the heating chamber, which is used to generate heat and heat up the heating chamber. The oxygen probe is installed on the furnace body, and the detection end of the oxygen probe is located inside the heating chamber, which is used to detect the oxygen content in the heating chamber. The main oxygen supply pipeline is installed on the furnace body, and is used to connect with the oxygen supply device to transport the oxygen generated by the oxygen supply device. One end of the branch oxygen supply pipeline is connected to the main oxygen supply pipeline, and is used to transport oxygen. The other end of the branch oxygen supply pipeline is connected to the heating chamber, and is used to transport oxygen to different areas of the heating chamber. The electromagnetic valve is installed on each branch oxygen supply pipeline, and is used to make each branch oxygen supply pipeline in a conducting or blocking state. The furnace door is movably arranged on the furnace body, and is used to open or close the heating chamber. The driving member is installed between the furnace body and the furnace door, and is used to drive the furnace door to move relative to the furnace body to realize automatic opening and closing of the heating chamber.

[0019] During use, the drive is controlled to work, and the furnace door can open or close the heating chamber. When the heating chamber is in the open state, the tray and the workpiece contained in the tray can be placed inside the heating chamber. When the heating chamber is in the closed state, the workpiece contained in the tray can be heated. When the heating tube continues to generate heat and heats the workpiece in the tray, the oxygen probe will detect the oxygen content in the heating chamber in real time. When the oxygen content is lower than the standard value, the solenoid valve is controlled to be turned on, and oxygen can be transported to the inside of the heating chamber through the main oxygen supply pipeline and the branch oxygen supply pipeline. After the oxygen is transported for the set time, the solenoid valve is controlled to be blocked, and the oxygen consumed in the heating chamber can be replenished. It solves the problem that the heated workpieces are often unqualified due to too little oxygen content in the heating furnace, and improves the qualified rate of the workpieces.

[0020] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of an oxygen supply device for an automated heating furnace for shape-preserving quenching based on PLC control provided in an embodiment of the present disclosure;

[0023] Figure 2 It is a schematic diagram of the main structure of an oxygen supply device for an automated heating furnace for shape-preserving quenching based on PLC control provided in an embodiment of the present disclosure;

[0024] Figure 3 It is a side view structural schematic diagram of an oxygen supply device for an automated heating furnace for conformal quenching controlled by PLC provided in an embodiment of the present disclosure;

[0025] Figure 4 It is a rear view structural schematic diagram of an oxygen supply device with a protective cover for an automated heating furnace for conformal quenching controlled by PLC provided in an embodiment of the present disclosure;

[0026] Figure 5 It is a schematic diagram of the rear view structure of the automated heating furnace for conformal quenching controlled by PLC with the protective cover removed, provided in an embodiment of the present disclosure.

[0027] Reference numerals:

[0028] 1: furnace body; 2: heating tube; 3: oxygen probe; 4: main oxygen supply pipeline; 5: branch oxygen supply pipeline; 6: solenoid valve; 7: furnace door; 8: first rocker arm; 9: second rocker arm; 10: rotating shaft; 11: third rocker arm; 12: connecting rod; 13: motor; 14: protective cover; 15: support plate; 16: flow meter; 17: electric control cabinet. DETAILED DESCRIPTION

[0029] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0030] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0031] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0032] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0033] Unless otherwise stated, the term "plurality" means two or more.

[0034] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0035] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0037] Combination Figures 1 to 5As shown, the embodiment of the present disclosure provides an oxygen supply device for an automated heating furnace for conformal quenching based on PLC control, including a furnace body 1, a heating tube 2, an oxygen probe 3, a main oxygen supply pipeline 4, a branch oxygen supply pipeline 5, an electromagnetic valve 6, a furnace door 7 and a driving member. The furnace body 1 includes a heating chamber. The heating tube 2 is installed on the furnace body 1, and the heating end of the heating tube 2 is located inside the heating chamber. The oxygen probe 3 is installed on the furnace body 1, and the detection end of the oxygen probe 3 is located inside the heating chamber. The main oxygen supply pipeline 4 is installed on the furnace body 1 for connecting to the oxygen supply device. One end of the branch oxygen supply pipeline 5 is connected to the main oxygen supply pipeline 4, and the other end of the branch oxygen supply pipeline 5 is connected to the heating chamber. The electromagnetic valve 6 is installed on each branch oxygen supply pipeline 5, respectively, and is used to make each branch oxygen supply pipeline 5 in a conducting or blocking state. The furnace door 7 is movably arranged on the furnace body 1. The driving member is installed between the furnace body 1 and the furnace door 7, and is used to drive the furnace door 7 to move relative to the furnace body 1. Wherein, under the drive of the driving member, the furnace door 7 opens or closes the heating chamber.

[0038] The oxygen supply device of the automatic heating furnace for conformal quenching based on PLC control provided by the embodiment of the present disclosure includes a furnace body 1, a heating tube 2, an oxygen probe 3, a main oxygen supply pipeline 4, a branch oxygen supply pipeline 5, a solenoid valve 6, a furnace door 7 and a driving member. The furnace body 1 includes a heating chamber, which is used to heat the workpiece placed on the tray. The heating tube 2 is installed on the furnace body 1, and the heating end of the heating tube 2 is located inside the heating chamber, which is used to generate heat to heat up the heating chamber. The oxygen probe 3 is installed on the furnace body 1, and the detection end of the oxygen probe 3 is located inside the heating chamber, which is used to detect the oxygen content in the heating chamber. The main oxygen supply pipeline 4 is installed on the furnace body 1, which is used to be connected to the oxygen supply device to transport the oxygen generated by the oxygen supply device. One end of the branch oxygen supply pipeline 5 is connected to the main oxygen supply pipeline 4, and is used to transport oxygen. The other end of the branch oxygen supply pipeline 5 is connected to the heating chamber, which is used to transport oxygen to different areas of the heating chamber. The electromagnetic valve 6 is installed on each branch oxygen supply pipeline 5, and is used to make each branch oxygen supply pipeline 5 in a conducting or blocking state. The furnace door 7 is movably arranged on the furnace body 1, and is used to open or close the heating chamber. The driving member is installed between the furnace body 1 and the furnace door 7, and is used to drive the furnace door 7 to move relative to the furnace body 1, so as to realize the automatic opening and closing of the heating chamber.

[0039] During use, the drive member is controlled to work, and the furnace door 7 can open or close the heating chamber. When the heating chamber is in the open state, the tray and the workpiece contained in the tray can be placed inside the heating chamber. When the heating chamber is in the closed state, the workpiece contained in the tray can be carried out. When the heating tube 2 continues to generate heat and heats the workpiece in the tray, the oxygen probe 3 will detect the oxygen content in the heating chamber in real time. When the oxygen content is lower than the standard value, the solenoid valve 6 is controlled to be turned on, and oxygen can be transported to the inside of the heating chamber through the main oxygen supply pipeline 4 and the branch oxygen supply pipeline 5. After the oxygen is transported for the set time, the solenoid valve 6 is controlled to be blocked, and the oxygen consumed in the heating chamber can be replenished. The problem that the heated workpiece is often unqualified due to too little oxygen content in the heating furnace is solved, and the qualified rate of the workpiece is improved.

[0040] Optionally, combined Figures 1 to 3 As shown, the driving member includes a first rocker arm 8 and a second rocker arm 9. One end of the first rocker arm 8 is rotatably connected to the furnace body 1, and the other end of the first rocker arm 8 is rotatably connected to the furnace door 7. The second rocker arm 9 is rotatably installed on the furnace body 1, and one end of the second rocker arm 9 is rotatably connected to the furnace door 7. The second rocker arm 9 can be controlled to rotate to drive the furnace door 7 to open or close the heating chamber.

[0041] In the disclosed embodiment, the driving member includes a first rocker arm 8 and a second rocker arm 9. One end of the first rocker arm 8 is rotatably connected to the furnace body 1, and the other end of the first rocker arm 8 is rotatably connected to the furnace door 7, so as to ensure the stability of the furnace door 7 when it moves. The second rocker arm 9 is rotatably installed on the furnace body 1, and one end of the second rocker arm 9 is rotatably connected to the furnace door 7, and the other end is controlled to move to drive the furnace door 7 to move. During use, the second rocker arm 9 can rotate relative to the furnace body 1 under the drive of external force. Then, under the support of the first rocker arm 8, the furnace door 7 can be driven to move relative to the furnace body 1, thereby opening or closing the heating chamber.

[0042] Optionally, combined Figure 4 and Figure 5 As shown, the driving member further includes a rotating shaft 10, a third rocker arm 11 and a connecting rod 12. The rotating shaft 10 is rotatably mounted on the furnace body 1. One end of the third rocker arm 11 is connected to the rotating shaft 10. Both ends of the connecting rod 12 are rotatably connected to the other end of the second rocker arm 9 and the other end of the third rocker arm 11, respectively. The rotating shaft 10 can be controlled to rotate to drive the second rocker arm 9 to perform a rotational motion.

[0043] In the disclosed embodiment, the driving member also includes a rotating shaft 10, a third rocker arm 11 and a connecting rod 12. The rotating shaft 10 is rotatably mounted on the furnace body 1, and can rotate relative to the furnace body 1. One end of the third rocker arm 11 is connected to the rotating shaft 10, and moves driven by the rotating shaft 10. The two ends of the connecting rod 12 are rotatably connected to the other end of the second rocker arm 9 and the other end of the third rocker arm 11, respectively, for transmitting driving force. During use, the rotating shaft 10 can rotate under the drive of external force. Then, the third rocker arm 11 is driven to rotate, and then the second rocker arm 9 can rotate under the pull or push of the connecting rod 12, and finally the furnace door 7 can be moved relative to the furnace body 1.

[0044] Optionally, combined Figure 4 and Figure 5 As shown, the driving member further includes a motor 13. The motor 13 is installed on the furnace body 1. The rotating shaft 10 rotates under the drive of the motor 13.

[0045] In the embodiment of the present disclosure, the driving member further comprises a motor 13 mounted on the furnace body 1. The motor 13 is used to provide driving force to drive the rotating shaft 10 to rotate, and finally the furnace door 7 automatically moves relative to the furnace body 1 to realize the automatic opening or closing function of the heating chamber.

[0046] Optionally, combined Figure 5 As shown, the driving member also includes a driving gear and a driven gear. The driving gear is installed at the rotating end of the motor 13. The driven gear is installed on the rotating shaft 10 and is meshed with the teeth of the driving gear. The diameter of the driving gear is smaller than the diameter of the driven gear.

[0047] In the disclosed embodiment, the driving member also includes a driving gear and a driven gear for transmitting driving force. During use, the motor 13 is controlled to work, which can drive the driving gear to rotate. Through the meshing action between the teeth, the rotating shaft 10 can be driven to rotate. Finally, the furnace door 7 automatically moves relative to the furnace body 1, realizing the automatic opening or closing function of the heating chamber. In addition, the design in which the diameter size of the driving gear is smaller than the diameter size of the driven gear can reduce the rotation speed and thus increase the output torque.

[0048] Optionally, combined Figure 4 and Figure 5 As shown, the driving member further includes a protective cover 14. The protective cover 14 is installed on the furnace body 1 and covers the outside of the driving gear and the driven gear. The protective cover 14 includes a notch, and the notch is used to pass the rotating end of the motor 13.

[0049] In the embodiment of the present disclosure, the driving member further comprises a protective cover 14 mounted on the furnace body 1. The protective cover 14 covers the outside of the driving gear and the driven gear to play a protective role.

[0050] Optionally, combined Figure 1 and Figure 2 As shown, it also includes a support plate 15. The support plate 15 is installed on the furnace body 1 and is located at the bottom of the heating chamber.

[0051] In the embodiment of the present disclosure, a support plate 15 is also included which is installed on the furnace body 1. The support plate 15 is located at the bottom of the heating chamber and is used to support the tray.

[0052] Optionally, combined Figure 4 and Figure 5 As shown, it also includes a flow meter 16. The flow meter 16 is installed on the main oxygen supply pipeline 4.

[0053] In the embodiment of the present disclosure, a flow meter 16 is also included which is installed on the main oxygen supply pipeline 4. The flow meter 16 is used to measure the oxygen flow rate of the main oxygen supply pipeline 4, and plays a role of real-time monitoring.

[0054] Optionally, combined Figure 4 and Figure 5 As shown, an electric control cabinet 17 is also included. The electric control cabinet 17 is electrically connected to the oxygen probe 3 and each solenoid valve 6.

[0055] In the disclosed embodiment, an electric control cabinet 17 electrically connected to the oxygen probe 3 and each solenoid valve 6 is also included. The electric control cabinet 17 includes a PLC control cabinet, which uses the PLC as the main control device to intelligently control the operation of the oxygen probe 3 and each solenoid valve 6. During use, the oxygen probe 3 is used to detect the oxygen content in the heating chamber. When the oxygen content is lower than the standard value, a feedback signal is given to the PLC control cabinet. The PLC control cabinet automatically controls the solenoid valve 6 to be in a conducting state, thereby delivering oxygen to the heating chamber. After delivering oxygen for a set time, the PLC control cabinet automatically controls the solenoid valve 6 to be in a blocked state to replenish the oxygen consumed in the heating chamber. Then, the oxygen probe 3 detects the oxygen content in the heating chamber here. When the oxygen content does not reach the standard value, repeat the above operation until the oxygen content is higher than the standard value. Therefore, the oxygen supply device of the automatic heating furnace for conformal quenching controlled by PLC can solve the problem of unqualified workpieces due to too little oxygen content.

[0056] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. Based on PLC control, the oxygen supply device of the automatic heating furnace for shape-preserving quenching is characterized in that: include: A furnace body, the furnace body comprising a heating chamber; A heating tube is installed on the furnace body, and a heating end of the heating tube is located inside the heating chamber; An oxygen probe is installed on the furnace body, and a detection end of the oxygen probe is located inside the heating chamber; A main oxygen supply pipeline is installed on the furnace body and is used to be connected to the oxygen supply device; A branch oxygen supply pipeline, one end of which is connected to the main oxygen supply pipeline, and the other end of which is connected to the heating chamber; Solenoid valves are respectively installed on each branch oxygen supply pipeline and are used to make each branch oxygen supply pipeline in a conducting or blocking state; A furnace door, movably arranged on the furnace body; A driving member, installed between the furnace body and the furnace door, and used for driving the furnace door to move relative to the furnace body; Wherein, under the driving of the driving member, the furnace door opens or closes the heating chamber.

2. The oxygen supply device for the automatic heating furnace for preservative quenching based on PLC control according to claim 1 is characterized in that: The driving member comprises: a first rocker arm, one end of which is rotatably connected to the furnace body, and the other end of which is rotatably connected to the furnace door; A second rocker arm is rotatably mounted on the furnace body, and one end of the second rocker arm is rotatably connected to the furnace door; Wherein, the second rocker arm can be controlled to rotate to drive the furnace door to open or close the heating chamber.

3. The oxygen supply device for the automatic heating furnace for shape-preserving quenching based on PLC control according to claim 2 is characterized in that: The driving member also includes: A rotating shaft rotatably mounted on the furnace body; A third rocker arm, one end of which is connected to the rotating shaft; A connecting rod, two ends of which are rotatably connected to the other end of the second rocker arm and the other end of the third rocker arm respectively; The rotating shaft can be controlled to rotate so as to drive the second rocker arm to perform rotational motion.

4. The oxygen supply device for the automatic heating furnace for preservative quenching based on PLC control according to claim 3 is characterized in that: The driving member also includes: A motor, mounted on the furnace body; Wherein, the rotating shaft performs rotational motion under the drive of the motor.

5. The oxygen supply device for the automatic heating furnace for shape-preserving quenching based on PLC control according to claim 4 is characterized in that: The driving member also includes: A driving gear, mounted on the rotating end of the motor; A driven gear is mounted on the rotating shaft and meshes with the driving gear; Wherein, the diameter size of the driving gear is smaller than the diameter size of the driven gear.

6. The oxygen supply device for the automatic heating furnace for shape-preserving quenching based on PLC control according to claim 5 is characterized in that: The driving member also includes: A protective cover is installed on the furnace body and covers the outside of the driving gear and the driven gear; Wherein, the protective cover comprises a gap, and the gap is used for passing the rotating end of the motor.

7. The oxygen supply device for an automated heating furnace for conformal quenching controlled by PLC according to any one of claims 1 to 6, characterized in that: Also includes: The support plate is installed on the furnace body and located at the bottom of the heating chamber.

8. The oxygen supply device for an automated heating furnace for conformal quenching controlled by PLC according to any one of claims 1 to 6, characterized in that: Also includes: A flow meter is installed on the main oxygen supply pipeline.

9. The oxygen supply device for an automated heating furnace for conformal quenching controlled by PLC according to any one of claims 1 to 6, characterized in that: Also includes: An electric control cabinet is electrically connected to the oxygen probe and each of the solenoid valves.

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