Cooling recovery device for vacuum furnace

Abstract

The utility model discloses a cooling recovery device for a vacuum furnace, which comprises an upper hearth, a lower hearth, a cooling motor and a centrifugal fan, and further comprises an upper air return box and a condenser, a plurality of upper air return through pipes communicated with the upper air return box are arranged on the two sides of the upper air return box respectively, a lower air return box and a condenser installation cavity which are communicated with each other are arranged in the lower hearth from top to bottom, and an air inlet through pipe and a lower air return through pipe which are correspondingly communicated with the lower air return box and the condenser installation cavity are arranged on the two sides of the lower air return box and the condenser installation cavity respectively. The air inlet through pipe and the lower air return through pipe correspond to the air inlet through groove and the upper air return through pipe in the bottom of the upper hearth in position and are communicated with each other, so that when the upper hearth and the lower hearth are closed in a covering mode, a circulating flow channel for cooling airflow to flow is formed in the upper hearth and the lower hearth. The cooling device can improve the cooling efficiency of products in the vacuum furnace.

Description

TECHNICAL FIELD

[0001] The utility model relates to vacuum furnace technical field especially relates to a cooling recovery device for vacuum furnace. BACKGROUND

[0002] The vacuum furnace includes separate heating area, vacuum area and cooling area. The product is moved to the cooling area for rapid cooling after being heated and kept for a period of time in the vacuum furnace heating area. In order to accelerate the cooling of the product, the cooling motor and centrifugal fan are arranged on the upper and lower sides of the vacuum furnace, which reduces the installation space of the condenser and reduces the cooling efficiency of the cooling area of the vacuum furnace.

[0003] Therefore, the cooling recovery device for the vacuum furnace is provided to solve the above problems. SUMMARY

[0004] In order to overcome the above-mentioned shortcomings, the purpose of the utility model is to provide a cooling recovery device for vacuum furnace, which forms a cooling flow channel by sealing the upper and lower hearths, and shares a cooling motor arranged in the upper hearth, so that the lower hearth has enough space for the installation of the condenser, and the cooling efficiency of the product in the vacuum furnace is improved.

[0005] In order to achieve the above purpose, the utility model adopts the technical scheme: a cooling recovery device for vacuum furnace, comprising an upper hearth, a lower hearth, a cooling motor and a centrifugal fan, the centrifugal fan is connected with the driving end of the cooling motor, further comprising an upper return air box and a condenser, the centrifugal fan is connected with the top of the upper return air box and is arranged in the upper hearth in turn from top to bottom, a plurality of upper return air pipes are arranged on the two sides of the upper return air box and are connected with the upper return air box, a lower return air box and a condenser installation cavity are arranged in the lower hearth from top to bottom and are connected with each other, the two sides of the lower return air box and the condenser installation cavity are respectively provided with air inlet pipes and lower return air pipes corresponding to them, the air inlet pipes and the lower return air pipes are respectively connected with the air inlet grooves and the upper return air pipes at the bottom of the upper hearth, so that when the upper hearth and the lower hearth are closed, a circulating flow channel for cooling air flow is formed in the inside.

[0006] Further, the upper support plate is arranged at the lower end of the upper hearth, one end of the upper return air pipe away from the upper return air box extends to the lower surface of the upper support plate, and the air inlet grooves are arranged on the upper support plate along the length direction of the vacuum furnace. The air inlet grooves and the upper return air pipes do not interfere with each other, and there is no mixing phenomenon, so as to ensure that the air flow blown into the lower return air box from the air inlet grooves is always cooling air flow, and the cooling efficiency of the product is ensured.

[0007] Further, the upper return air box comprises a support bottom plate for placing a product jig, the air inlet pipe is of a structure with a sealed bottom and an open top, and a plurality of air inlet openings are formed in the bottom of the side of the air inlet pipe close to the upper return air box and communicated with the upper return air box.

[0008] Further, a plurality of air passing grooves are formed in the support bottom plate in parallel with the length direction of the support bottom plate, the air passing grooves correspond to the positions of the air inlet openings, and the product jig is arranged above the air passing grooves. The air passing grooves are lower than the product jig, so that the cooling air flow in the air inlet pipe blows into the lower surface of the product from below the product after being guided by the air passing grooves, thereby radiating the lower surface of the product and improving the heat dissipation efficiency of the product.

[0009] Further, the upper support plate is provided with a flow guide plate corresponding to the position of the upper return air box, and a plurality of flow guide holes are formed in the flow guide plate. The flow guide plate is arranged above the lower return air box, so that part of the cooling air flow blown by the centrifugal fan blows into the upper surface of the product through the flow guide holes of the flow guide plate, thereby accurately radiating the upper surface of the product, and the other part of the cooling air flow blows into the air inlet groove and then blows into the air inlet pipe from the air inlet groove, and then blows into the lower return air box from the air inlet pipe, thereby accurately radiating the lower surface of the product.

[0010] Further, the flow guide plate is arranged in an inverted V shape. The V-shaped arrangement of the flow guide plate enables the flux to flow down from both sides of the flow guide plate, thereby effectively preventing the flux from accumulating.

[0011] Further, a plurality of return air holes are formed in the support bottom plate and communicated with the condenser installation chamber.

[0012] Further, the air inlet pipe and the lower return air pipe are each provided with a sealing ring along the edge thereof.

[0013] The beneficial effects of the utility model are as follows:

[0014] In the utility model, the cooling air flow in the vacuum furnace is circulated between the upper furnace and the lower furnace through the air inlet groove, the air inlet pipe, the upper return air pipe and the lower return air pipe under the action of the cooling motor, the centrifugal fan and the condenser. Further, one cooling motor and one centrifugal fan can be reduced, the condenser is arranged in a large area in the vacuum furnace, and the cooling efficiency of the product in the vacuum furnace is effectively improved. The condenser is installed in a pulling manner, and the flux is conveniently recycled. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1It is the overall structure shaft side view of one embodiment of the utility model;

[0016] Fig. 2 It is the partial structure shaft side view of one embodiment of the utility model;

[0017] Fig. 3 It is the cooling airflow flow direction schematic view of one embodiment of the utility model;

[0018] Fig. 4 It is the partial structure shaft side view of one embodiment of the utility model;

[0019] In the figure: 1, upper hearth;2, lower hearth;3, cooling motor;4, centrifugal fan;5, upper return air box;6, lower return air box;7, product fixture;8, condenser installation chamber;9, upper return air pipe;10, air inlet pipe;11, upper support plate;12, air inlet pipe;13, lower return air pipe;14, air inlet;15, air passage;16, guide plate;17, guide hole;18, return air hole. Specific implementation

[0020] The preferred embodiments of the utility model are described in detail below in combination with the drawings, so that the advantages and characteristics of the utility model can be more easily understood by the person skilled in the art, and the protection scope of the utility model can be more clearly and explicitly defined.

[0021] Referring to the drawings Figs. 1-2 The cooling recovery device for the vacuum furnace in the embodiment includes an upper hearth 1, a lower hearth 2, a cooling motor 3, and a centrifugal fan 4, the centrifugal fan 4 is connected with the driving end of the cooling motor 3, further includes an upper return air box 5 and a condenser, the centrifugal fan 4 is connected with the top of the upper return air box 5 and is sequentially arranged in the upper hearth 1 from top to bottom, in some embodiments, the centrifugal fan 4 is arranged on the inner top wall of the upper hearth 1, the cooling motor 3 is arranged on the outer wall surface of the upper hearth 1, the driving end of the cooling motor 3 penetrates the upper hearth 1 and is connected with the central shaft of the centrifugal fan 4, when the cooling motor 3 works, the centrifugal fan 4 can be driven to rotate, and the airflow is guided to the two sides of the upper return air box 5 and then enters the lower hearth 2, so that the product in the lower hearth 2 is cooled;

[0022] A plurality of upper return air pipes 9 are sequentially arranged along the length direction of the vacuum furnace, the airflow after cooling the product flows into the upper return air box 5 in the upper hearth 1 from the plurality of upper return air pipes 9 after being cooled by the condenser, and then flows to the product in the lower hearth 2 under the action of the centrifugal fan 4, so that the product is cooled, and the return air efficiency of the whole vacuum furnace is improved.

[0023] In some embodiments, the upper air return pipe 9 is arranged in an L shape, facilitating the circulating cooling air to flow into the upper air return box 5 from bottom to top.

[0024] The lower furnace 2 is internally provided with a lower air return box 6 and a condenser installation chamber 8, which are in communication with each other, the lower air return box 6 is used to support the product fixture 7, and the product fixture 7 can place a plurality of products that need to be welded and cooled, and the condenser installation chamber 8 is used to install the condenser. No cooling motor 3 and centrifugal fan 4 are arranged below the lower furnace 2. Therefore, a sufficient limited space for laying the condenser is left below the lower air return box 6, thereby further improving the condensation efficiency of the entire vacuum furnace on the products.

[0025] The lower air return box 6 and the condenser installation chamber 8 are respectively provided with air inlet pipes 12 and lower air return pipes 13 corresponding to them on both sides, and the cooling air can flow into the lower air return box 6 from the air inlet pipes 12 to cool the products. The cooling air gradually heated after cooling the products enters the condenser installation chamber 8 from the lower air return box 6 under the action of the centrifugal fan 4, becomes low-temperature cooling air after passing through the condenser, and flows into the upper air return box 5 from the lower air return pipe 13. Finally, it is blown out through the centrifugal fan 4, realizing the cooling circulation.

[0026] The air inlet pipes 12 and the lower air return pipes 13 are respectively corresponding to the air inlet grooves 10 and the upper air return pipes 9 at the bottom of the upper furnace 1 and are in communication with each other, so that when the upper furnace 1 and the lower furnace 2 are combined, a circulating flow channel for the cooling air to flow is formed in the inside.

[0027] Specifically, after the products are placed in the lower air return box 6, the upper furnace 1 is closed, the cooling motor 3 drives the centrifugal fan 4 to start working, the centrifugal fan 4 draws the air in the upper air return box 5 and directs it to both sides of the upper air return box 5, so that the cooling air can flow into the corresponding air inlet pipes 12 from the air inlet grooves 10 on both sides of the upper air return box 5. The air inlet pipes 12 are in communication with the lower air return box 6 on the lower furnace 2, so the cooling air can directly enter the lower air return box 6 and blow into the surface of the products to dissipate heat. The cooling air heated during the heat dissipation process is drawn from the lower air return box 6 to the condenser installation chamber 8 under the continued action of the centrifugal fan 4, and after being cooled by the condenser, it flows from the lower air return pipes 13 on both sides of the condenser installation chamber 8 to the upper air return pipes 9 in the upper furnace 1, and finally returns to the upper air return box 5.

[0028] That is, under the action of the cooling motor 3, the centrifugal fan 4 and the condenser in the vacuum furnace, the cooling air flows through the air inlet grooves 10, the air inlet pipes 12, the upper air return pipes 9 and the lower air return pipes 13 corresponding to each other, realizing the circulation between the upper furnace 1 and the lower furnace 2. Further, one cooling motor 3 and centrifugal fan 4 can be reduced to lay the condenser in a large area inside the vacuum furnace, effectively improving the cooling efficiency.

[0029] Further, an upper support plate 11 is arranged at the lower end of the upper furnace 1, and the upper return air duct 9 extends to the lower surface of the upper support plate 11 at the end away from the upper return air box 5, and the air inlet channel 10 is arranged on the upper support plate 11 along the length direction of the vacuum furnace. The air inlet channel 10 and the upper return air duct 9 do not interfere with each other, and there is no mixing phenomenon, so as to ensure that the air flow blown into the lower return air box 6 from the air inlet channel 10 is always a cooling air flow, and the cooling efficiency of the product is ensured.

[0030] The upper return air box 5 includes a support bottom plate for placing the product jig 7, and the air inlet duct 12 is a structure with a sealed bottom and an open top, and a plurality of air inlet openings 14 are arranged on the side of the air inlet duct 12 close to the upper return air box 5 and in communication with the upper return air box 5. The cooling gas in the lower return air box 6 is delivered by the air inlet duct 12 on both sides, and the cooling air flow is sequentially blown into the inside of the upper furnace 1, the air inlet channel 10, the air inlet duct 12 and the lower return air box 6 by the centrifugal fan 4, forming a fixed cooling channel.

[0031] A plurality of parallel air passing grooves 15 are arranged on the support bottom plate along the length direction of the support bottom plate, the air passing grooves 15 correspond to the positions of the air inlet openings 14, and the product jig 7 is arranged above the air passing grooves 15. The air passing grooves 15 are arranged lower than the product jig 7, so that the cooling air flow in the air inlet duct 12 is blown into the lower return air box 6 after being guided by the air passing grooves 15, and then is blown into the lower surface of the product from below the product jig 7 to cool the lower surface of the product, thereby improving the heat dissipation efficiency of the product.

[0032] A guide plate 16 corresponding to the position of the upper return air box 5 is arranged at the bottom of the upper support plate 11, and a plurality of through guide holes 17 are arranged on the guide plate 16. The guide plate 16 is arranged above the lower return air box 6, and is arranged such that part of the cooling air flow blown by the centrifugal fan 4 is blown into the upper surface of the product through the guide holes 17 on the guide plate 16 to accurately cool the upper surface of the product, and the other part is blown into the air inlet channel 10, and then is blown into the air inlet duct 12 from the air inlet channel 10, and then is blown into the lower return air box 6 from below the product jig 7 to accurately cool the lower surface of the product.

[0033] That is, the product is cooled from the upper and lower sides, which can further improve the heat dissipation efficiency of the product.

[0034] The guide plate 16 is arranged in an inverted V shape. The V-shaped arrangement allows the flux on the guide plate 16 to flow down from both sides of the guide plate 16, effectively preventing the flux from accumulating.

[0035] In some embodiments, the condenser is arranged in the vacuum furnace in a push-pull manner. Specifically, referring to FIG. 4, the condenser is arranged in the vacuum furnace in a push-pull manner, and the condenser is arranged in the vacuum furnace in a push-pull manner. Fig. 3The condenser is pushed into the vacuum furnace from the left side of the vacuum furnace, and the flux dropped on the condenser is conveniently cleaned and recovered.

[0036] The support bottom plate is provided with a plurality of return air holes 18 which are communicated with the lower return air box 6 and the condenser mounting chamber 8.

[0037] The top of the air inlet pipe 12 and the lower return air pipe 13 are provided with sealing rings along the edges thereof, so that the sealing property of the cooling channel and the return flow channel is ensured after the upper hearth 1 and the lower hearth 2 are covered, and the cooling efficiency of the vacuum furnace is ensured.

[0038] It should be noted that the cooling channel is a channel through which the cooling air flows in sequence through the air inlet channel 10, the air inlet pipe 12 and finally into the lower return air box 6, and the return flow channel is a channel through which the cooling air flows in sequence from the lower return air box 6, through the condenser, the lower return air pipe 13, the upper return air pipe 9 and finally into the upper return air box 5, wherein the cooling channel and the return flow channel are one-way channels.

[0039] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A cooling and recovery device for a vacuum furnace, comprising an upper furnace chamber, a lower furnace chamber, a cooling motor, and a centrifugal fan, wherein the centrifugal fan is connected to the drive end of the cooling motor, characterized in that: It also includes an upper return air box and a condenser. The centrifugal fan is connected to the top of the upper return air box and is arranged sequentially from top to bottom in the upper furnace. Several upper return air pipes are arranged on both sides of the upper return air box and are connected to it. The lower furnace has an interconnected lower return air box and a condenser installation chamber arranged from top to bottom. The lower return air box and the condenser installation chamber are respectively provided with corresponding air inlet pipes and lower return air pipes on both sides. The air inlet pipes and lower return air pipes correspond to the positions of the air inlet slot and the upper return air pipe at the bottom of the upper furnace and are connected to each other, so that when the upper furnace and the lower furnace are closed, a circulating flow channel for cooling airflow is formed inside.

2. The cooling and recovery device for a vacuum furnace according to claim 1, characterized in that: It also includes an upper support plate located at the lower end of the upper furnace chamber, with one end of the upper return air duct extending away from the upper return air box to the lower surface of the upper support plate, and the air inlet slot opened on the upper support plate along the length of the vacuum furnace.

3. A cooling and recovery device for a vacuum furnace according to claim 1, characterized in that: The upper return air box includes a supporting base plate for placing product fixtures. The air inlet pipe has a structure with a sealed bottom and an open top, and several air inlets communicating with the upper return air box are opened on the bottom side of the pipe near the upper return air box.

4. A cooling and recovery device for a vacuum furnace according to claim 3, characterized in that: The support base plate has multiple parallel air passage slots along its length, the air passage slots correspond to the air inlet positions, and the product fixture is mounted above the air passage slots.

5. A cooling and recovery device for a vacuum furnace according to claim 2, characterized in that: The bottom of the upper support plate is provided with a guide plate corresponding to the position of the upper return air box, and the guide plate has several through guide holes.

6. A cooling recovery device for a vacuum furnace according to claim 5, characterized in that: The deflector is arranged in an inverted V-shape.

7. A cooling and recovery device for a vacuum furnace according to claim 3, characterized in that: The support base plate has several return air holes that connect the lower return air box and the condenser installation chamber.

8. A cooling and recovery device for a vacuum furnace according to claim 5, characterized in that: Both the top of the air inlet duct and the bottom return duct are provided with sealing rings along their edges.

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