Air-cooled circulating vacuum quenching furnace

Abstract

This disclosure discloses an air-cooled circulating vacuum quenching furnace, comprising: a furnace body, a furnace cover installed at one end of the furnace body, a pushing structure installed on one side of the furnace body, the output end of the pushing structure being rotatably connected to the furnace cover, a cavity opened inside the furnace cover, and a connecting air inlet structure installed on the side of the cavity near the furnace body, the connecting air inlet structure including a first baffle and a second baffle, the second baffle being elastically connected to the furnace cover. In this air-cooled circulating vacuum quenching furnace, the cavity opened inside the furnace cover and the connecting air inlet structure installed on the side of the cavity near the furnace body allow inert gas to be introduced into the furnace body through the furnace cover, thereby completely blowing out the air inside the furnace body before vacuuming. Even if there is residual gas inside the furnace body, the workpiece will not come into contact with oxygen during the quenching process, thus ensuring the quenching quality and processing quality of the workpiece.

Description

Technical Field

[0001] This disclosure relates to the field of quenching furnace technology, and in particular to an air-cooled circulating vacuum quenching furnace. Background Technology

[0002] Vacuum quenching furnaces are precision heat treatment equipment used to heat, hold, and rapidly cool metal workpieces in a vacuum and controlled atmosphere. Their core function is to achieve high-quality quenching with no oxidation, no decarburization, low deformation, and a bright surface. Most existing vacuum quenching furnaces are divided into two chambers: one for heating and the other for cooling. Heating is achieved by evacuating the heating chamber. However, due to material limitations, the furnace cannot be completely vacuum-sealed, leaving some residual air. This can lead to oxidation during high-temperature heating, affecting the quenching effect. Furthermore, during quenching, an air pump is used to extract the heat-exchanged gas, which can easily damage the pump due to the high temperature, thus affecting the lifespan of the equipment. Summary of the Invention

[0003] This disclosure aims to at least partially address one of the technical problems in the related art.

[0004] Therefore, the purpose of this disclosure is to provide an air-cooled circulating vacuum quenching furnace.

[0005] To achieve the above objectives, this disclosure provides an air-cooled circulating vacuum quenching furnace, comprising: a furnace body, a furnace cover mounted at one end of the furnace body, a pushing structure mounted on one side of the furnace body, the output end of the pushing structure being rotatably connected to the furnace cover, a cavity being formed inside the furnace cover, and a connecting air inlet structure mounted on the side of the cavity near the furnace body, the connecting air inlet structure including a first baffle and a second baffle, the second baffle being elastically connected to the furnace cover; and a placement structure, the placement structure including a sliding frame slidably fitted inside the furnace body, multiple heating resistance wires fixed inside the furnace body, and a heat preservation cavity formed around the periphery of the furnace body, wherein a heat preservation cavity is installed between the heat preservation cavity and the cavity. The furnace body is equipped with a blocking structure, which includes multiple blocking plates that are elastically connected to the cavity wall of the insulation chamber. It also includes an exhaust structure, comprising an exhaust chamber with an outlet on one side. A third and fourth baffle plate are rotatably fitted inside the exhaust chamber. A cooling chamber is located at the end of the furnace body, connected to both the exhaust chamber and the insulation chamber. A heat exchange tube is installed inside the cooling chamber. A cooling box is fixed to the furnace body, with a first and a second suction pump installed at each end. The inlet of the first suction pump is connected to the cooling chamber, and a telescopic connection structure is installed between the outlet of the second suction pump and the cavity.

[0006] Optionally, the pushing structure includes: an electric cylinder, which is fixed to one side of the furnace body, and a first rotating frame is fixed to the output end of the electric cylinder. A rotating shaft is rotatably fitted inside the first rotating frame, and the rotating shaft is fixedly connected to the furnace cover; wherein, a first motor is fixed on the first rotating frame, and the output end of the first motor is fixedly connected to the rotating shaft.

[0007] Optionally, the furnace body is provided with a quenching chamber, and a slide rail is fixed inside the cavity wall of the quenching chamber. The sliding frame slides inside the slide rail, and multiple placement plates are fixed on the sliding frame. Multiple through holes are provided on the placement plates. The end of the slide rail is equipped with a locking pin, and a locking groove is provided on the sliding frame. The end of the locking pin is located in the locking groove.

[0008] Optionally, the insulation cavity has multiple first connecting ports on one side and multiple second connecting ports inside the cavity, the second connecting ports being connected to the first connecting ports. Multiple first sliding grooves are formed inside the insulation cavity, and multiple sliding rods are fixed to a blocking plate. The sliding rods are located within the first sliding grooves, and multiple first springs are fixed between the sliding rods and the groove walls of the first sliding grooves. The blocking plate is located on one side of the first connecting ports and blocks them. A push rod is fixed inside the second connecting port, contacting the blocking plate. A third connecting port is formed on the push rod, and a first electric valve is installed inside the third connecting port. Multiple support rods are fixed inside the insulation cavity, and multiple air blowing holes are formed on the periphery of the insulation cavity. Second electric valves are installed inside the air blowing holes, and the air blowing holes are connected to the quenching cavity.

[0009] Optionally, an air inlet is provided in the cavity, which is connected to the quenching chamber. A first baffle is fixed inside the air inlet, and a second sliding groove is provided inside the air inlet. A sliding block is slidably fitted inside the second sliding groove, and the sliding block is fixedly connected to the second baffle. Multiple second springs are fixed between the sliding block and the second sliding groove. The first baffle has multiple first air holes, and the second baffle has multiple second air holes, which are staggered.

[0010] Optionally, a second motor is fixed on one side of the furnace body, and the output end of the second motor is fixedly connected to the third baffle and the fourth baffle. Multiple third air holes are opened between the quenching chamber and the exhaust chamber. Multiple fourth air holes are fixed on the third baffle. A groove is opened on the fourth baffle, and the groove is connected to the air outlet. A second rotating frame is fixed on the fourth baffle. Multiple fifth air holes are opened on the second rotating frame, and the fifth air holes are connected to the cooling chamber.

[0011] Optionally, a connecting pipe is fixed between the cooling chamber and the insulation chamber, and a third electric valve is installed inside the connecting pipe; wherein, the heat exchange tube is fixed inside the cooling chamber, the heat exchange tube has an annular structure, a water inlet pipe is fixed on one side of the heat exchange tube, and a water outlet pipe is fixed on the other side of the heat exchange tube.

[0012] Optionally, a coolant tank is fixed to the lower side of the cooling box, and the first and second air pumps are both fixedly connected to the cooling box. The outlet of the first air pump is connected to the cooling box, and the inlet of the second air pump is connected to the cooling box.

[0013] Optionally, multiple heat exchange plates are fixed on the coolant tank. The heat exchange plates are located inside the coolant tank and have a hollow structure. The two ends of the heat exchange plates are respectively provided with liquid inlet and liquid outlet, and both liquid inlet and liquid outlet are connected to the coolant tank.

[0014] Optionally, the telescopic connection structure includes: a telescopic rod, which is fixed to the second air pump. The telescopic rod includes a first rod body and a second rod body, which are slidably connected. Both the first rod body and the second rod body are hollow structures. Multiple third springs are fixed between the first rod body and the second rod body. The second rod body is connected to the cavity. A fourth electric valve is installed on the second rod body.

[0015] The technical solution provided in this disclosure may include the following beneficial effects: 1. A cavity is opened inside the furnace cover, and a connecting air intake structure is installed on the side of the cavity near the furnace body. Inert gas can be introduced into the furnace body through the furnace cover, thereby completely blowing out the air in the furnace body. Then, a vacuum is drawn. At this time, even if there is gas residue in the furnace body, it will not cause the workpiece to come into contact with oxygen during the quenching process, thus ensuring the quenching quality of the workpiece and the processing quality of the workpiece.

[0016] 2. An exhaust port is opened on one side of the exhaust chamber, and a cooling box is installed on the furnace body. The inert gas can be circulated by the air pump, which can reduce the waste of inert gas, reduce production costs, and allow the inert gas to be initially cooled by the cooling chamber and further cooled by the cooling box. This can ensure the quenching effect, prevent high temperatures from damaging the air pump, and extend the service life of the device.

[0017] 3. By opening insulation cavities around the furnace body, heat can be retained, thereby reducing heat waste. Cooler inert gas can be introduced into the insulation cavities and then into the quenching cavity, thus ensuring temperature uniformity within the insulation cavities and achieving rapid cooling, thereby improving the quenching effect.

[0018] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which: Figure 1This is a schematic diagram of the overall assembly three-dimensional structure of an air-cooled circulating vacuum quenching furnace according to an embodiment of the present disclosure; Figure 2 This is a schematic diagram of the three-dimensional assembly structure of the furnace body and furnace cover in an air-cooled circulating vacuum quenching furnace according to an embodiment of the present disclosure. Figure 3 This is a schematic diagram of the overall assembly cross-sectional structure of an air-cooled circulating vacuum quenching furnace according to an embodiment of this disclosure; Figure 4 yes Figure 3 A schematic diagram at point A in the middle; Figure 5 yes Figure 3 A schematic diagram at point B in the middle; Figure 6 yes Figure 3 A schematic diagram at point C in the middle; Figure 7 This is a schematic diagram of the assembly cross-sectional structure of the furnace body in an embodiment of the air-cooled circulating vacuum quenching furnace proposed in this disclosure; Figure 8 This is a schematic diagram of the three-dimensional structure of the furnace cover in an air-cooled circulating vacuum quenching furnace according to an embodiment of the present disclosure; Figure 9 This is a schematic diagram of the three-dimensional assembly structure of the second rotating frame in an air-cooled circulating vacuum quenching furnace according to an embodiment of the present disclosure; Figure 10 This is a schematic diagram of the three-dimensional assembly structure of the sliding frame in an air-cooled circulating vacuum quenching furnace according to an embodiment of this disclosure; Figure 11 This is a schematic diagram of the assembly cross-sectional structure of the quenching chamber and the heat preservation chamber in an air-cooled circulating vacuum quenching furnace according to an embodiment of this disclosure. As shown in the figure: 101, furnace body; 102, furnace cover; 103, electric cylinder; 104, first rotating frame; 105, first motor; 106, rotating shaft; 201. Sliding frame; 202. Slide rail; 203. Placement plate; 204. Through hole; 301. Quenching chamber; 302. Heating resistance wire; 303. Insulation chamber; 304. First connecting port; 305. First sliding groove; 306. Sliding rod; 307. Blocking plate; 308. First spring; 309. Support rod; 401. Cavity; 402. Second connecting port; 403. Push rod; 404. Third connecting port; 405. Air inlet; 406. First baffle; 407. Second baffle; 408. First air hole; 409. Second air hole; 410. Second sliding groove; 411. Sliding block; 412. Second spring; 501. Exhaust chamber; 502. Second motor; 503. Third baffle; 504. Fourth baffle; 505. Second rotating frame; 506. Third air hole; 507. Fourth air hole; 508. Fifth air hole; 509. Air outlet; 601. Cooling chamber; 602. Cooling tank; 603. First air pump; 604. Connecting pipe; 605. Third electric valve; 606. Coolant tank; 607. Heat exchange plate; 608. Heat exchange tube; 609. Liquid inlet; 610. Liquid outlet; 611. Second air pump; 612. Telescopic rod; 613. First rod body; 614. Second rod body; 615. Third spring; 616. Fourth electric valve. Detailed Implementation

[0020] Embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are used only to explain this disclosure, and should not be construed as limiting this disclosure. Rather, embodiments of this disclosure include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0021] like Figures 1 to 11 As shown in the figure, this disclosure proposes an air-cooled circulating vacuum quenching furnace, comprising: a furnace body 101, a furnace cover 102 mounted at one end of the furnace body 101, a pushing structure mounted on one side of the furnace body 101, the output end of the pushing structure being rotatably connected to the furnace cover 102, a cavity 401 formed inside the furnace cover 102, a communicating air inlet structure mounted on the side of the cavity 401 near the furnace body 101, the communicating air inlet structure including a first baffle 406 and a second baffle 407, the second baffle 407 being elastically connected to the furnace cover 102; and a placement structure, the placement structure including a sliding frame 201 slidably fitted inside the furnace body 101, a plurality of heating resistance wires 302 fixed inside the furnace body 101, a heat preservation cavity 303 formed on the periphery of the furnace body 101, and a blocking structure mounted between the heat preservation cavity 303 and the cavity 401. The blocking structure includes multiple blocking plates 307, which are elastically connected to the cavity wall of the insulation cavity 303; the exhaust structure includes an exhaust cavity 501, with an exhaust port 509 on one side of the exhaust cavity 501, and a third baffle 503 and a fourth baffle 504 rotatably fitted inside the exhaust cavity 501; a cooling cavity 601 is provided at the end of the furnace body 101, which is connected to the exhaust cavity 501 and the insulation cavity 303, and a heat exchange tube 608 is installed inside the cooling cavity 601; a cooling box 602 is fixed on the furnace body 101, and a first suction pump 603 and a second suction pump 611 are respectively installed at both ends of the cooling box 602; the air inlet of the first suction pump 603 is connected to the cooling cavity 601, and a telescopic connection structure is installed between the air outlet of the second suction pump 611 and the cavity 401.

[0022] Specifically, the steel forging is placed on the placement plate 203, and then the placement plate 203 is slid into the furnace body 101 for quenching. Before quenching, the furnace cover 102 is closed, and then an inert gas is introduced into the furnace body 101 through a vacuum pump in conjunction with the furnace cover 102 to blow out the air inside the furnace body 101. After the air is completely blown out, a vacuum is then created by the vacuum pump to prevent residual oxygen in the furnace body 101 from causing oxidation of the steel forging, thus ensuring the quenching effect of the steel forging. Then, relatively cold inert gas is introduced into the furnace body 101. The gas can rapidly cool the interior of furnace 101, and auxiliary gas intake through the insulation chamber 303 ensures uniform heat distribution within furnace 101, preventing excessive heat loss during heating and guaranteeing optimal roughing performance. This allows the device to process fastener steel used in the automotive and wind power industries, high-performance machine tool guide rails, and high-performance tunneling machine tools. It also ensures optimal processing results for high-strength cord steel products, gas insulation, pipeline, and railway weathering welding wire steel. A controller is installed on one side of furnace 101 to control the device's operation and improve its efficiency.

[0023] In this embodiment, the pushing structure includes: an electric cylinder 103, which is fixed to one side of the furnace body 101. A first rotating frame 104 is fixed to the output end of the electric cylinder 103. A rotating shaft 106 is rotatably fitted inside the first rotating frame 104. The rotating shaft 106 is fixedly connected to the furnace cover 102. A first motor 105 is fixed on the first rotating frame 104. The output end of the first motor 105 is fixedly connected to the rotating shaft 106.

[0024] Specifically, when it is necessary to open or close the furnace cover 102 to process or remove the steel forgings inside the furnace cover 102, the electric cylinder 103 is activated, which pushes the first rotating frame 104 to move, causing the furnace cover 102 to move. This prevents the furnace body 101 from continuing to limit the furnace cover 102. Then, the first motor 105 is activated, which drives the rotating shaft 106 to rotate, thereby causing the furnace cover 102 to flip, so that the furnace cover 102 no longer obstructs the furnace body 101, making it easier to remove the steel forgings inside the furnace body 101. When the furnace cover 102 is closed, it can seal the inside of the furnace body 101, which not only ensures the sealing effect and prevents external air from entering the furnace body 101 through gaps and causing oxidation of the steel forgings inside the furnace body 101, but also ensures the vacuum effect inside the furnace body 101 and prevents the inert gas from escaping and being wasted, thus improving the quenching effect of the device and expanding the application range of the device.

[0025] The furnace body 101 has a quenching chamber 301. A slide rail 202 is fixed inside the cavity wall of the quenching chamber 301. The sliding frame 201 slides inside the slide rail 202. Multiple placement plates 203 are fixed on the sliding frame 201. Multiple through holes 204 are opened on the placement plates 203. The end of the slide rail 202 is equipped with a locking pin. The sliding frame 201 has a locking groove. The end of the locking pin is located in the locking groove.

[0026] Specifically, when the steel forging needs to be placed in the quenching chamber 301 for quenching, the furnace cover 102 is opened, and then the sliding frame 201 is manually slid out, so that the placement plate 203 is fully exposed. The steel forging can then be placed on the placement plate 203. The sliding frame 201 is then slid into the quenching chamber 301 to perform the quenching action. After sliding into the quenching chamber 301, the locking pin can be manually inserted into the locking groove to fix the sliding frame 201, thereby ensuring the stability of the steel forging on the sliding frame 201 and preventing the steel forging from shaking, thus ensuring the quenching effect of the steel forging.

[0027] The insulation cavity 303 has multiple first connecting ports 304 on one side, and multiple second connecting ports 402 are provided inside the cavity 401. The second connecting ports 402 are connected to the first connecting ports 304. The insulation cavity 303 has multiple first sliding grooves 305. Multiple sliding rods 306 are fixed on the blocking plate 307. The sliding rods 306 are located inside the first sliding grooves 305. Multiple first springs 308 are fixed between the sliding rods 306 and the groove wall of the first sliding groove 305. The blocking plate 307 is located in the first... One side of the connecting port 304 is blocked, and the first connecting port 304 is blocked. A push rod 403 is fixed in the second connecting port 402. The push rod 403 is in contact with the blocking plate 307. A third connecting port 404 is opened on the push rod 403. A first electric valve is installed in the third connecting port 404. A plurality of support rods 309 are fixed in the heat preservation cavity 303. A plurality of air blowing holes are opened on the periphery of the heat preservation cavity 303. A second electric valve is installed in the air blowing holes. The air blowing holes are connected to the quenching cavity 301.

[0028] Specifically, the insulation cavity 303 is filled with inert gas, which can insulate the quenching cavity 301, thereby generating a higher temperature in the quenching cavity 301 for heat preservation, reducing heat loss and thus reducing heat energy waste. When it is necessary to fill the insulation cavity 303 with inert gas, the furnace lid 102 is closed, causing the furnace lid 102 to move the push rod 403, which in turn moves the blocking plate 307. The first spring 308 is stretched, creating a gap between the blocking plate 307 and the first connecting port 304, through which inert gas can be introduced. Furthermore, when it is necessary to fill the quenching cavity 301 with inert gas... When the insulation cavity 303 is sealed, closing the first electric valve prevents further leakage. When the furnace cover 102 is opened, the first spring 308 rebounds, causing the blocking plate 307 to reset, thus preventing the inert gas in the insulation cavity 303 from flowing out and reducing waste of inert gas. When the quenching cavity 301 is rapidly cooled, opening the second electric valve allows the inert gas in the insulation cavity 303 to pass through the air vent into the quenching cavity 301, ensuring that the temperature in the quenching cavity 301 can be rapidly reduced, thereby ensuring the quenching effect of the steel forgings, improving work efficiency, preventing damage to the steel forgings, and ensuring the product qualification rate.

[0029] An air inlet 405 is provided in the cavity 401, and the air inlet 405 is connected to the quenching chamber 301. A first baffle 406 is fixed in the air inlet 405. A second sliding groove 410 is provided in the air inlet 405. A sliding block 411 is slidably fitted in the second sliding groove 410. The sliding block 411 is fixedly connected to the second baffle 407. A plurality of second springs 412 are fixed between the sliding block 411 and the second sliding groove 410. The first baffle 406 is provided with a plurality of first air holes 408, and the second baffle 407 is provided with a plurality of second air holes 409. The first air holes 408 and the second air holes 409 are staggered.

[0030] Specifically, inert gas is introduced into cavity 401. When the gas pressure in cavity 401 is too high, the higher pressure compresses the second baffle 407, causing it to slide under the action of sliding block 411 and second sliding groove 410. The second spring 412 is compressed, creating a gap between the first baffle 406 and the second baffle 407. Inert gas can then enter the quenching chamber 301 through this gap, either by expelling the gas from the chamber or by cooling and quenching it. When the quenching chamber 301 is in a vacuum state, the wall of the second sliding groove 410 limits the sliding of the second baffle 407. At this time, a portion of the furnace cover 102 is directly inserted into the furnace body 101, thus limiting the furnace cover 102 and ensuring its sealing effect. This prevents gas leakage and quenching failure, thereby ensuring the processing quality of the steel forgings.

[0031] A second motor 502 is fixed on one side of the furnace body 101. The output end of the second motor 502 is fixedly connected to the third baffle 503 and the fourth baffle 504. Multiple third air holes 506 are opened between the quenching chamber 301 and the exhaust chamber 501. Multiple fourth air holes 507 are fixed on the third baffle 503. A groove is opened on the fourth baffle 504, and the groove is connected to the air outlet 509. A second rotating frame 505 is fixed on the fourth baffle 504. Multiple fifth air holes 508 are opened on the second rotating frame 505, and the fifth air holes 508 are connected to the cooling chamber 601.

[0032] Specifically, when air needs to be vented, the second motor 502 is activated, causing it to drive the third baffle 503 and the fourth baffle 504, and the second rotating frame 505 to rotate. At this time, the third vent 506 and the fourth vent 507 are connected, allowing air from inside the furnace body 101 to enter the exhaust chamber 501 through these vents and finally exit from the outlet 509. When inert gas needs to be circulated, the second motor 502 is activated, and the second motor drives... When the third baffle 503 and the fourth baffle 504 and the second rotating frame 505 rotate, the third vent 506 and the fourth vent 507 are in a connected state, and the vent 509 is blocked. Inert gas can enter the cooling chamber 601 through the fifth vent 508, thereby realizing the circulation of inert gas. In the cooling chamber 601, it mixes with the inert gas in the insulation chamber 303 and undergoes preliminary cooling, which can prevent the inert gas temperature from being too high and causing damage to the first air pump 603, thus extending the service life of the device.

[0033] A connecting pipe 604 is fixed between the cooling chamber 601 and the insulation chamber 303, and a third electric valve 605 is installed inside the connecting pipe 604; wherein, the heat exchange tube 608 is fixed inside the cooling chamber 601, the heat exchange tube 608 has an annular structure, a water inlet pipe is fixed on one side of the heat exchange tube 608, and a water outlet pipe is fixed on the other side of the heat exchange tube 608.

[0034] Specifically, a coolant at a lower temperature is introduced into the heat exchange tube 608 through the inlet pipe. After exchanging heat with the inert gas through the heat exchange tube 608, the coolant flows out through the outlet pipe, thereby cooling the inert gas. Furthermore, the inert gas in the furnace body 101 mixes with the inert gas in the insulation cavity 303 blown out by the connecting pipe 604, thereby improving the efficiency of temperature reduction, ensuring the cooling effect, and thus ensuring the quenching effect and the production quality of steel forgings.

[0035] A coolant tank 606 is fixed to the lower side of the cooling tank 602. A first air pump 603 and a second air pump 611 are both fixedly connected to the cooling tank 602. The outlet of the first air pump 603 is connected to the cooling tank 602, and the inlet of the second air pump 611 is connected to the cooling tank 602. Multiple heat exchange plates 607 are fixed on the coolant tank 606, located inside the cooling tank 602. The heat exchange plates 607 are hollow, and each end of the heat exchange plate 607 has a liquid inlet 609 and a liquid outlet 610. All 0 are connected to the coolant tank 606. The telescopic connection structure includes: a telescopic rod 612, which is fixed to the second air pump 611. The telescopic rod 612 includes a first rod body 613 and a second rod body 614. The first rod body 613 and the second rod body 614 are slidably connected. Both the first rod body 613 and the second rod body 614 are hollow structures. A plurality of third springs 615 are fixed between the first rod body 613 and the second rod body 614. The second rod body 614 is connected to the cavity 401. A fourth electric valve 616 is installed on the second rod body 614.

[0036] Specifically, when vacuuming is required, the first vacuum pump 603 is started to evacuate the gas, and then the inert gas is sent into the cooling box 602 for cooling. When circulation is required, the first vacuum pump 603 and the second vacuum pump 611 are started. The first vacuum pump 603 sends the inert gas into the cooling box 602, and then the inert gas contacts the heat exchange plate 607 for heat exchange. Then, the second vacuum pump 611 extracts the inert gas from the cooling box 602 and sends it into the cavity 401, which then enters the furnace body 101 for quenching. At this time, the air pressure in the second rod 614 is relatively high, causing the second rod 614 to be pushed upward and inserted into the furnace cover 102, which can play a certain limiting role in the furnace cover 102, thereby ensuring the stability of the furnace cover 102 and improving the sealing effect of the device.

[0037] Workflow: Starting the electric cylinder 103 moves the first rotating frame 104, causing it to move the furnace cover 102, thus preventing the furnace body 101 from further restricting the furnace cover 102. Then, starting the first motor 105 rotates the shaft 106, causing the furnace cover 102 to flip, preventing it from obstructing the furnace body 101. This facilitates placing the steel forgings from the furnace body 101 onto the placement plate 203. The sliding frame 201 is then slid into the quenching chamber 301 for quenching. After sliding into the quenching chamber 301, the locking pin can be manually inserted into the locking groove to lock the furnace. After the sliding frame 201 is fixed, the furnace cover 102 is closed. The insulation cavity 303 is filled with inert gas. The furnace cover 102 moves the push rod 403, causing the push rod 403 to push the blocking plate 307 to move. The first spring 308 is stretched, creating a gap between the blocking plate 307 and the first connecting port 304, allowing inert gas to pass through. When it is necessary to seal the insulation cavity 303, the first electric valve is closed to prevent further leakage. When the furnace cover 102 is opened, the first spring 308 rebounds, causing the blocking plate 307 to reset, thus preventing the inert gas in the insulation cavity 303 from flowing out and reducing waste of inert gas. When it is necessary to vent air... At this time, the second motor 502 is started, causing the third baffle 503 and the fourth baffle 504 and the second rotating frame 505 to rotate. At this time, the third air hole 506 and the fourth air hole 507 are connected, so the air in the furnace body 101 enters the exhaust chamber 501 through the third air hole 506 and the fourth air hole 507, and finally exits from the air outlet 509. Then, it is heated by the heating resistance wire 302. After heating is completed, the second motor 502 is started, which drives the third baffle 503 and the fourth baffle 504 and the second rotating frame 505 to rotate. At this time, the third air hole 506 and the fourth air hole 507 are in a connected state, and the air outlet... With 509 blocked, inert gas can enter the cooling chamber 601 through the fifth vent 508, thus enabling the circulation of inert gas. The inert gas mixes with the inert gas in the insulation chamber 303 within the cooling chamber 601 and undergoes preliminary cooling, preventing the inert gas from overheating and damaging the first extraction pump 603. Activating the first extraction pump 603 and the second extraction pump 611 allows the inert gas to be sent into the cooling box 602 via the first extraction pump 603. The inert gas then contacts the heat exchange plate 607 for heat exchange. The second extraction pump 611 then extracts the inert gas from the cooling box 602 and sends it into the cavity 401, thus entering the furnace body 101 for quenching.

[0038] In the description of this disclosure, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0039] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of preferred embodiments of this disclosure includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this disclosure pertain.

[0040] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A gas-cooled circulating vacuum quenching furnace, characterized in that, include: A furnace body (101) is provided with a furnace cover (102) at one end. A pushing structure is provided on one side of the furnace body (101). The output end of the pushing structure is rotatably connected to the furnace cover (102). A cavity (401) is provided inside the furnace cover (102). A connecting air intake structure is provided on the side of the cavity (401) near the furnace body (101). The connecting air intake structure includes a first baffle (406) and a second baffle (407). The second baffle (407) is elastically connected to the furnace cover (102). The placement structure includes a sliding frame (201) that is slidably fitted inside the furnace body (101), a plurality of heating resistance wires (302) that are fixed inside the furnace body (101), a heat preservation cavity (303) that is opened on the periphery of the furnace body (101), and a blocking structure that is installed between the heat preservation cavity (303) and the cavity (401). The blocking structure includes a plurality of blocking plates (307) that are elastically connected to the cavity wall of the heat preservation cavity (303). The exhaust structure includes an exhaust chamber (501), an outlet (509) on one side of the exhaust chamber (501), a third baffle (503) and a fourth baffle (504) rotatably fitted inside the exhaust chamber (501), a cooling chamber (601) at the end of the furnace body (101), the cooling chamber (601) being connected to the exhaust chamber (501) and the heat preservation chamber (303), a heat exchange tube (608) being installed inside the cooling chamber (601), a cooling box (602) being fixed on the furnace body (101), a first suction pump (603) and a second suction pump (611) being installed at both ends of the cooling box (602), the inlet end of the first suction pump (603) being connected to the cooling chamber (601), and a telescopic connection structure being installed between the outlet end of the second suction pump (611) and the cavity (401).

2. The air-cooled circulating vacuum quenching furnace according to claim 1, characterized in that, The propulsion structure includes: An electric cylinder (103) is fixed to one side of the furnace body (101). A first rotating frame (104) is fixed to the output end of the electric cylinder (103). A rotating shaft (106) is rotatably fitted inside the first rotating frame (104). The rotating shaft (106) is fixedly connected to the furnace cover (102). The first rotating frame (104) is fixed with a first motor (105), and the output end of the first motor (105) is fixedly connected to the rotating shaft (106).

3. The air-cooled circulating vacuum quenching furnace according to claim 1, characterized in that, include: The furnace body (101) has a quenching chamber (301) inside. A slide rail (202) is fixed inside the cavity wall of the quenching chamber (301). The sliding frame (201) slides inside the slide rail (202). Multiple placement plates (203) are fixed on the sliding frame (201). Multiple through holes (204) are opened on the placement plate (203). The slide rail (202) is equipped with a locking pin at its end, and the slide frame (201) is provided with a locking groove, with the end of the locking pin located in the locking groove.

4. The air-cooled circulating vacuum quenching furnace according to claim 3, characterized in that, include: The insulation cavity (303) has multiple first connecting ports (304) on one side, and multiple second connecting ports (402) are provided in the cavity (401). The second connecting ports (402) are connected to the first connecting ports (304). The insulation cavity (303) has multiple first sliding grooves (305). Multiple sliding rods (306) are fixed on the blocking plate (307). The sliding rods (306) are located in the first sliding grooves (305). Multiple first springs (308) are fixed between the first sliding groove (305) and the groove wall. A blocking plate (307) is located on one side of the first connecting port (304) and blocks the first connecting port (304). A push rod (403) is fixed in the second connecting port (402). The push rod (403) is in contact with the blocking plate (307). A third connecting port (404) is opened on the push rod (403). A first electric valve is installed in the third connecting port (404). The heat insulation cavity (303) is fixed with multiple support rods (309), and multiple air blowing holes are opened on the periphery of the heat insulation cavity (303). A second electric valve is installed in the air blowing hole, and the air blowing hole is connected to the quenching cavity (301).

5. The air-cooled circulating vacuum quenching furnace according to claim 3, characterized in that, include: An air inlet (405) is provided in the cavity (401), and the air inlet (405) is connected to the quenching chamber (301). A first baffle (406) is fixed in the air inlet (405). A second sliding groove (410) is provided in the air inlet (405). A sliding block (411) is slidably fitted in the second sliding groove (410). The sliding block (411) is fixedly connected to the second baffle (407). A plurality of second springs (412) are fixed between the sliding block (411) and the second sliding groove (410). The first baffle (406) has multiple first air holes (408), and the second baffle (407) has multiple second air holes (409). The first air holes (408) and the second air holes (409) are staggered.

6. The air-cooled circulating vacuum quenching furnace according to claim 3, characterized in that, include: A second motor (502) is fixed on one side of the furnace body (101). The output end of the second motor (502) is fixedly connected to the third baffle (503) and the fourth baffle (504). A plurality of third air holes (506) are opened between the quenching chamber (301) and the exhaust chamber (501). A plurality of fourth air holes (507) are fixed on the third baffle (503). A groove is opened on the fourth baffle (504), and the groove is connected to the air outlet (509). A second rotating frame (505) is fixed on the fourth baffle (504). A plurality of fifth air holes (508) are opened on the second rotating frame (505), and the fifth air holes (508) are connected to the cooling chamber (601).

7. The air-cooled circulating vacuum quenching furnace according to claim 1, characterized in that, include: A connecting pipe (604) is fixed between the cooling chamber (601) and the heat preservation chamber (303), and a third electric valve (605) is installed inside the connecting pipe (604). The heat exchange tube (608) is fixed inside the cooling chamber (601). The heat exchange tube (608) has an annular structure. A water inlet pipe is fixed on one side of the heat exchange tube (608), and a water outlet pipe is fixed on the other side of the heat exchange tube (608).

8. The air-cooled circulating vacuum quenching furnace according to claim 1, characterized in that, include: A coolant tank (606) is fixed to the lower side of the cooling box (602). The first air pump (603) and the second air pump (611) are both fixedly connected to the cooling box (602). The air outlet of the first air pump (603) is connected to the cooling box (602), and the air inlet of the second air pump (611) is connected to the cooling box (602).

9. The air-cooled circulating vacuum quenching furnace according to claim 8, characterized in that, The term includes: Multiple heat exchange plates (607) are fixed on the coolant tank (606). The heat exchange plates (607) are located inside the coolant tank (602). The heat exchange plates (607) are hollow structures. The two ends of the heat exchange plates (607) are respectively provided with liquid inlet (609) and liquid outlet (610). Both the liquid inlet (609) and the liquid outlet (610) are connected to the coolant tank (606).

10. The air-cooled circulating vacuum quenching furnace according to claim 1, characterized in that, The telescopic connection structure includes: Telescopic rod (612), the telescopic rod (612) is fixed on the second air pump (611), the telescopic rod (612) includes a first rod body (613) and a second rod body (614), the first rod body (613) and the second rod body (614) are slidably connected, the first rod body (613) and the second rod body (614) are both hollow structures, a plurality of third springs (615) are fixed between the first rod body (613) and the second rod body (614), the second rod body (614) is connected to the cavity (401), and a fourth electric valve (616) is installed on the second rod body (614).

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