Circulating heat exchange type vacuum gas quenching furnace

Abstract

The utility model relates to the technical field of vacuum gas quenching furnaces, and discloses a circulating heat exchange type vacuum gas quenching furnace which comprises a vacuum gas quenching furnace body, a set of connectors are arranged on the outer wall of the vacuum gas quenching furnace body, circulating pipes are connected to the outsides of the connectors, a water cooling tank is connected to one end of each circulating pipe, and a flow dividing air bellow is rotationally installed on one side of the interior of the water cooling tank; a plurality of heat exchange pipes are arranged on the inner wall of the flow dividing air bellow in the circumferential direction at equal intervals, the ends, away from the flow dividing air bellow, of the heat exchange pipes are connected with an air bellow, a sealing plate is rotationally installed on the other side in the water cooling tank, and a three-way air pipe is arranged outside the sealing plate. The workpiece is placed in the vacuum gas quenching furnace to be heated in advance, a proper environment is provided for heat treatment of the workpiece, cold air is divided through the multiple heat exchange pipes, the heat exchange efficiency is improved, the bevel gear rotates to drive the sealing plate, the air box and the heat exchange pipes to rotate, the multiple heat exchange pipes make full contact with cooling liquid, the heat exchange uniformity is improved, and the heat exchange efficiency is improved. And the workpiece cooling effect is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of vacuum air quenching furnaces, and in particular to a circulating heat exchange type vacuum air quenching furnace. Background Art

[0002] As high-end heat treatment equipment, vacuum gas quenching furnaces are widely used in industries such as aerospace, automobile manufacturing, and mold manufacturing to achieve rapid cooling of workpieces and surface treatment without oxidation or decarburization. Currently, most vacuum gas quenching furnaces on the market use direct exhaust or single-loop cooling systems. While these systems achieve efficient cooling, they also suffer from significant energy waste and uneven cooling. Specifically, direct exhaust systems are unable to effectively recover and utilize the heat released during the cooling process, resulting in low energy efficiency; while single-loop cooling systems are prone to affecting the cooling effect of subsequent workpieces due to the rapid rise in cooling medium temperature, resulting in uneven cooling rates and affecting product quality.

[0003] The above information disclosed in this background technology is only used to increase the understanding of the background technology of this application. Therefore, it may contain information that does not constitute the prior art known to ordinary technicians in this field. Utility Model Content

[0004] In order to solve the problem that the direct exhaust system cannot effectively recover and utilize the heat released during the cooling process, resulting in low energy efficiency; and the single-loop cooling system is prone to affecting the cooling effect of subsequent workpieces due to the rapid rise in cooling medium temperature, resulting in uneven cooling rate and affecting product quality, the present application provides a circulating heat exchange vacuum air quenching furnace.

[0005] The present application provides a circulating heat exchange vacuum air quenching furnace adopting the following technical solution:

[0006] A circulating heat exchange vacuum air quenching furnace includes a vacuum air quenching furnace, wherein the outer wall of the vacuum air quenching furnace is provided with a group of connectors, the outer side of the connector is connected to a circulation pipe, one end of the circulation pipe is connected to a water cooling tank, a diversion bellows is rotatably installed on one side of the inside of the water cooling tank, a plurality of heat exchange tubes are equidistantly provided on the inner wall of the diversion bellows along the circumferential direction, the end of the heat exchange tube away from the diversion bellows is connected to the bellows, a sealing plate is rotatably installed on the other side of the inside of the water cooling tank, and three ventilation ducts are provided on the outside of the sealing plate.

[0007] Preferably, a sealing cover is hingedly connected to the outer wall of the vacuum air quenching furnace, a connecting pipe is fixed to one side of the top of the water-cooling tank, and a water inlet pipe is provided on one side of the connecting pipe.

[0008] Preferably, a protective cover is detachably provided on the outer wall of the water-cooling tank close to one end of the vacuum air quenching furnace, a servo motor is fixed to one side of the outer wall of the protective cover, and the output end of the servo motor is transmission-connected to a bevel gear 1.

[0009] Preferably, a bevel gear 2 is rotatably mounted at the center of the outer wall of the protective cover, the bevel gear 1 is engaged with the bevel gear 2, and one end of the three ventilation pipes extends to the outside of the bevel gear 2 and is fixed to the inner wall of the bevel gear 2.

[0010] Preferably, sealing sleeves are symmetrically fixed on both sides of the outer wall of the sealing plate, and one end of the three ventilation pipes away from the second bevel gear passes through the sealing sleeve and extends into the sealing plate and is fixed to the outer wall of the bellows.

[0011] Preferably, a surface of the diversion bellows away from one end of the heat exchange tube is provided with a plurality of air inlets equidistantly along the circumferential direction.

[0012] In summary, this application has the following beneficial technical effects:

[0013] In this application, the workpiece is pre-placed in a vacuum air quenching furnace for heating, which provides a suitable environment for the heat treatment of the workpiece. After the heating is completed, the cooling operation can be carried out quickly, which improves the production efficiency. The cold air is diverted through multiple heat exchange tubes, which improves the heat exchange efficiency. The bevel gear rotates to drive the sealing plate, bellows and heat exchange tubes to rotate, so that multiple heat exchange tubes are fully in contact with the coolant, which improves the uniformity of heat exchange and ensures the cooling effect of the workpiece. The cooled gas is discharged to the outside through the three-way ventilation duct and transported to the vacuum air quenching furnace through the circulation pipe to cool the workpiece, thereby realizing circulating heat exchange. This recycling method not only saves energy, but also reduces pollution to the environment, realizes efficient heating and cooling, improves production efficiency, and ensures uniform cooling effect of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of a circulating heat exchange vacuum air quenching furnace according to an embodiment of the application.

[0015] Figure 2 It is a partial exploded view of the water-cooling tank of the application embodiment.

[0016] Figure 3 It is a structural schematic diagram of the bellows of the application embodiment.

[0017] Explanation of the accompanying symbols: 1. Vacuum air quenching furnace; 2. Connector; 3. Sealing cover; 4. Circulation pipe; 5. Water cooling tank; 6. Connecting pipe; 7. Protective cover; 8. Water inlet pipe; 9. Servo motor; 10. Bevel gear 1; 11. Bevel gear 2; 12. Three-ventilation duct; 13. Sealing sleeve; 14. Air inlet; 15. Sealing plate; 16. Bellows; 17. Heat exchange pipe; 18. Diverter bellows. DETAILED DESCRIPTION

[0018] The following is combined with Figure 1-3 This application is described in further detail.

[0019] The present application discloses a circulating heat exchange vacuum air quenching furnace. Figure 1 , including a vacuum air quenching furnace 1, the outer wall of the vacuum air quenching furnace 1 is hinged with a sealing cover 3, the outer wall of the vacuum air quenching furnace 1 is provided with a group of connectors 2, and a circulation pipe 4 is connected to the outside of the connector 2. The circulation of the internal cooling gas is realized through the connection of the connector 2, and one end of the circulation pipe 4 is connected to a water-cooled tank 5. A connecting pipe 6 is fixed on one side of the top of the water-cooled tank 5. The connecting pipe 6 is used to connect the air duct of the external cooling fan to transport the gas to the inside of the water-cooled tank 5, and a water inlet pipe 8 is provided on one side of the connecting pipe 6. The external coolant pump is connected through the water inlet pipe 8 to pump the cooling liquid into the water-cooled tank 5 to cool the gas.

[0020] like Figure 2-Figure 3 As shown, a diverter bellows 18 is rotatably installed on one side of the interior of the water-cooled tank 5, and some space is reserved between the diverter bellows 18 and the inner wall of the water-cooled tank 5. A plurality of heat exchange tubes 17 are equidistantly arranged on the inner wall of the diverter bellows 18 along the circumferential direction, and a plurality of air inlets 14 are equidistantly arranged on the surface of the diverter bellows 18 away from one end of the heat exchange tube 17 along the circumferential direction. Therefore, the airflow input through the connecting pipe 6 will be diverted and transported to the interior of the diverter bellows 18 through the air inlet 14, and then diverted to multiple heat exchange tubes 17.

[0021] In the present application, one end of the heat exchange tube 17 away from the diversion bellows 18 is connected to the bellows 16, and a sealing plate 15 is rotatably installed on the other side of the inside of the water-cooled tank 5, and the sealing plate 15 is connected to the bellows 16. Three ventilation pipes 12 are provided on the outside of the sealing plate 15, and a protective cover 7 is detachably provided on the outer wall of the water-cooled tank 5 close to the vacuum air quenching furnace 1. A servo motor 9 is fixed to one side of the outer wall of the protective cover 7. The output end of the servo motor 9 is transmission-connected to a bevel gear 10. A bevel gear 2 11 is rotatably installed at the center of the outer wall of the protective cover 7. The bevel gear 10 is meshed with the bevel gear 2 11, and one end of the three ventilation pipes 12 extends to the outside of the bevel gear 2 11 and is fixed to the inner wall of the bevel gear 2 11. One end of the circulation pipe 4 is rotatably connected to the output end of the three ventilation pipes 12.

[0022] In the present application, sealing sleeves 13 are symmetrically fixed on both sides of the outer wall of the sealing plate 15, and the end of the three ventilation pipes 12 away from the bevel gear 2 11 passes through the sealing sleeve 13 and extends to the inside of the sealing plate 15 and is fixed to the outer wall of the bellows 16. Therefore, as the bevel gear 10 and the bevel gear 2 11 engage, the three ventilation pipes 12 will be driven to rotate and push the bellows 16, the heat exchange pipe 17 and the diversion bellows 18 to rotate synchronously in the water-cooled tank 5, and then the multiple heat exchange pipes 17 can be fully in contact with the coolant, which plays a role in uniform heat exchange, improves the cooling effect of the gas, and facilitates the subsequent cooling and heat exchange of the interior of the vacuum air quenching furnace 1.

[0023] The implementation principle of a circulating heat exchange vacuum air quenching furnace in the embodiment of the present application is as follows: when in use, the sealing cover 3 is opened in advance to place the workpiece in the vacuum air quenching furnace 1 for heating, and the water cooling tank 5 is connected through the circulation pipe 4. After the heating is completed, the external cooling fan is connected through the connecting pipe 6. The cooling fan works to deliver cold air to the inside of the water cooling tank 5. The cold air is diverted to the diversion air box 18 through multiple air inlets 14, and then diverted to multiple heat exchange tubes 17. At this time, the external cooling pump is connected through the water inlet pipe 8 to pump the coolant into the water cooling tank 5. The coolant will flow through the surface of the heat exchange tube 17 for heat exchange, and at the same time, the bevel gear is driven by the servo motor 9. The rotation of gear 10 and engagement with bevel gear 2 11 can drive the sealing plate 15 and the bellows 16 to rotate synchronously through the three ventilation pipes 12, thereby driving the multiple heat exchange tubes 17 inside to rotate, so that the multiple heat exchange tubes 17 are fully in contact with the coolant, thereby improving the uniformity of heat exchange. The liquid after heat exchange is discharged through the water pipe at the bottom of the water-cooling tank 5 for subsequent use, and the cooled gas is discharged to the outside through the three ventilation pipes 12 and transported to the vacuum air quenching furnace 1 through the circulation pipe 4 to cool the workpiece. The gas after heat exchange with the workpiece in the vacuum air quenching furnace 1 is discharged through the connector 2 on the other side and connected to the cooling fan through the external pipeline, thereby realizing circulating heat exchange.

[0024] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change.

[0025] Secondly: The drawings of the embodiments disclosed in this utility model only involve structures related to the embodiments disclosed in this utility model. Other structures can refer to common designs. In the absence of conflicts, the same embodiment and different embodiments of the utility model can be combined with each other.

[0026] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0027] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A circulating heat exchange type vacuum air quenching furnace, comprising a vacuum air quenching furnace (1), characterized in that: The outer wall of the vacuum air quenching furnace (1) is provided with a group of connectors (2), the connectors (2) are externally connected to a circulation pipe (4), one end of the circulation pipe (4) is connected to a water cooling tank (5), a diversion bellows (18) is rotatably mounted on one side of the interior of the water cooling tank (5), a plurality of heat exchange tubes (17) are equidistantly arranged on the inner wall of the diversion bellows (18) along the circumferential direction, one end of the heat exchange tube (17) away from the diversion bellows (18) is connected to a bellows (16), a sealing plate (15) is rotatably mounted on the other side of the interior of the water cooling tank (5), and three ventilation tubes (12) are externally arranged on the sealing plate (15).

2. The circulating heat exchange vacuum air quenching furnace according to claim 1, characterized in that: A sealing cover (3) is hingedly connected to the outer wall of the vacuum air quenching furnace (1), a connecting pipe (6) is fixed to one side of the top of the water cooling tank (5), and a water inlet pipe (8) is provided on one side of the connecting pipe (6).

3. The circulating heat exchange vacuum air quenching furnace according to claim 1, characterized in that: The outer wall of the water-cooling tank (5) close to one end of the vacuum air quenching furnace (1) is detachably provided with a protective cover (7), a servo motor (9) is fixed to one side of the outer wall of the protective cover (7), and the output end of the servo motor (9) is transmission-connected to a bevel gear (10).

4. The circulating heat exchange vacuum air quenching furnace according to claim 3, characterized in that: A second bevel gear (11) is rotatably mounted at the center of the outer wall of the protective cover (7), the first bevel gear (10) is meshed with the second bevel gear (11), and one end of the three ventilation pipes (12) extends to the outside of the second bevel gear (11) and is fixed to the inner wall of the second bevel gear (11).

5. The circulating heat exchange vacuum air quenching furnace according to claim 1, characterized in that: Sealing sleeves (13) are symmetrically fixed on both sides of the outer wall of the sealing plate (15); one end of the three ventilation pipes (12) away from the second bevel gear (11) passes through the sealing sleeve (13) and extends into the sealing plate (15) and is fixed to the outer wall of the bellows (16).

6. The circulating heat exchange vacuum air quenching furnace according to claim 1, characterized in that: A plurality of air inlets (14) are provided at equal intervals along the circumferential direction on the surface of the diversion wind box (18) away from one end of the heat exchange tube (17).

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