Efficient heat dissipation structure of box type electric furnace

Abstract

The utility model relates to a box type electric furnace efficient heat dissipation structure which comprises an electric furnace box body, a hearth is arranged in the electric furnace box body, a plurality of sets of lifting grooves are formed in the top end of the hearth, each set of lifting grooves comprises two lifting grooves which are distributed front and back, a containing cavity is formed in the top end of the electric furnace box body, a lifting frame is arranged in the containing cavity, and a plurality of sets of lifting blocks are arranged at the bottom of the lifting frame. The lifting block is embedded into the lifting groove, an airflow channel is formed in the lifting block, and a through hole is formed in the bottom of the airflow channel; an air inlet channel and a heat dissipation channel are formed in the front end and the rear end of the electric furnace box body, the air inlet channel and the heat dissipation channel communicate with the lifting grooves correspondingly and correspond to the positions of the air flow channels of the two lifting blocks correspondingly, and after the lifting blocks descend, one ends of the air flow channels communicate with the heat dissipation channel and the air inlet channel correspondingly; one end of the air inlet channel is connected with the air inlet pipe, the air inlet pipe is connected with the draught fan, the draught fan is used for ventilating the hearth, hot air in the hearth is rapidly discharged, and the situation that high-temperature hot air hurts personnel after the furnace door is opened is avoided.

Description

Technical Field

[0001] This utility model relates to the field of industrial electric furnace technology, and in particular to a high-efficiency heat dissipation structure for a box-type electric furnace. Background Technology

[0002] Box-type industrial electric furnaces are commonly used for metal heat treatment, material sintering, and other high-temperature processing. Equipped with an advanced temperature control system, they can precisely adjust the furnace temperature to adapt to various process requirements. Box-type furnaces utilize high-efficiency insulation materials and designs to reduce heat loss and improve energy utilization. Currently, after use, the high-temperature gas inside a box-type furnace cannot dissipate quickly and needs to cool naturally to room temperature before samples can be removed. This results in a long waiting time before the next processing, wasting time and severely impacting work efficiency. Traditional cooling methods use water cooling to cool the furnace walls, followed by heat conduction to cool the hot gas inside the furnace. This conduction cooling method has generally low heat dissipation efficiency and cannot quickly dissipate the hot gas inside the furnace. The furnace door still needs to wait for a period of time before opening; furthermore, the cooled furnace needs to be reheated before the next batch of heat treatments, increasing energy consumption. Utility Model Content

[0003] To address the aforementioned problems, this utility model discloses a high-efficiency heat dissipation structure for a box-type electric furnace. It employs a telescopic air duct structure to directly discharge the hot airflow inside the furnace chamber, allowing for timely opening of the furnace door to retrieve and place workpieces. This solves the problems of slow cooling efficiency and high energy consumption in existing electric furnace heat dissipation structures.

[0004] The specific technical solution is as follows:

[0005] A high-efficiency heat dissipation structure for a box-type electric furnace includes an electric furnace body with a door at the front end. A furnace chamber is located inside the furnace body. Several sets of lifting slots are arranged horizontally at the top of the furnace chamber, with two slots in each set distributed front-to-back. A receiving cavity is located at the top of the furnace chamber, communicating with each lifting slot. A lifting frame is located within the receiving cavity. The lifting frame is driven by a drive cylinder located at the top of the electric furnace body. Several sets of lifting blocks are arranged horizontally at the bottom of the lifting frame, with two blocks in each set embedded downwards into a corresponding set of lifting slots. Each pair of lifting blocks in each set has a horizontally spaced airflow channel at one end. Each channel has several through holes at its bottom. The electric furnace body has horizontally penetrating air intake channels and heat dissipation channels at the front and rear ends of each set of lifting slots. The adjacent ends of the air intake channels and heat dissipation channels are connected to two lifting slots in a set and correspond to the airflow channel openings of two lifting blocks. After the driving cylinder drives the lifting blocks to descend through the lifting frame, the opening end of the airflow channel of each set of lifting blocks is connected to the heat dissipation channel and the air intake channel respectively. One end of several heat dissipation channels is connected to a heat dissipation pipe through a collection pipe, and one end of several air intake channels is connected to an air intake pipe through a collection pipe. One end of the air intake pipe is connected to the fan outlet end located at the top of the electric furnace body.

[0006] Furthermore, both the heat dissipation channel and the air inlet channel are provided with elastic joint assemblies at one end near the lifting groove. The elastic joint assembly includes a sleeve, a joint tube, and a spring. An installation groove is opened at one end of both the heat dissipation channel and the air inlet channel for installing the sleeve. The joint tube is horizontally slidably arranged inside the sleeve. One end of the joint tube is supported by the spring, so that the other end of the joint tube is connected to the airflow channel or pressed against the side wall of the lifting block.

[0007] Furthermore, one end of the connector tube has a tapered outer wall, which allows the connector tube to be pressed against the opening of the airflow channel by the tapered surface under the action of the spring, thus achieving a seal.

[0008] Furthermore, heating elements are provided on the inner wall of the furnace chamber and the inner wall of the door.

[0009] Furthermore, each of the lifting blocks has a retaining edge at its bottom, and the bottom of the lifting groove has a sealing groove that matches the retaining edge, so that after the lifting block rises, it is pressed upward into the sealing groove by the retaining edge, thereby sealing the lifting groove.

[0010] Furthermore, the lifting frame is longitudinally slidably connected around its perimeter by a slider that engages with a slide rail on the inner wall of the accommodating cavity.

[0011] Furthermore, the lifting block has a rectangular structure.

[0012] The beneficial effects of this utility model are reflected in:

[0013] Compared with the prior art, this utility model uses a lifting block with an airflow channel at the top of the furnace for lifting and lowering, so as to connect or close the air intake channel and the heat dissipation channel. When the lifting block rises, it seals the top of the furnace by cooperating with the sealing groove at its bottom edge, thus preventing heat loss from the furnace during the heating process. When the lifting block descends to the designated position, the heat dissipation channel and the air intake channel are connected to the inside of the furnace through the airflow channel of the lifting block. Then, the fan is used to ventilate the furnace, thereby quickly exhausting the hot air in the furnace, avoiding the high temperature air from causing harm to personnel after the furnace door is opened, and facilitating the handling of workpieces for the next batch of heat treatment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a side sectional view of the present invention.

[0016] Figure 3 This is a front sectional view of the present invention.

[0017] Figure 4 for Figure 2 Enlarged diagram of point A in the middle.

[0018] Explanation of reference numerals in the attached drawings: 1. Electric furnace body; 11. Lifting groove; 111. Sealing groove; 12. Receiving cavity; 121. Slide rail; 13. Lifting frame; 2. Door; 3. Furnace chamber; 4. Lifting block; 41. Airflow channel; 42. Opening; 43. Sidewall; 5. Air inlet channel; 51. Air inlet pipe; 52. Combining pipe; 53. Mounting groove; 6. Heat dissipation channel; 61. Heat dissipation pipe; 7. Flexible joint assembly; 71. Sleeve; 72. Joint pipe; 73. Spring; 8. Drive cylinder; 9. Fan. Detailed Implementation

[0019] To make the technical solution of this utility model clearer and more explicit, the utility model will be further described below with reference to the accompanying drawings. Any solution derived by equivalent substitution and conventional reasoning of the technical features of this utility model falls within the protection scope of this utility model. The fixed connections and fixed settings mentioned in this utility model are all common connection methods in the mechanical field, including welding, bolt and nut connections, and screw connections.

[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Please see the appendix Figure 1-4 This embodiment provides a high-efficiency heat dissipation structure for a box-type electric furnace, including an electric furnace body 1, a door 2 at the front end of the electric furnace body 1, a furnace chamber 3 inside the electric furnace body 1, heating elements on the inner side wall of the furnace chamber 3 and the inner wall of the door 2, and several sets of lifting slots 11 arranged horizontally at the top of the furnace chamber 3, with two lifting slots 11 in each set distributed front to back. A receiving cavity 12 is located at the top of the furnace chamber 3 in the electric furnace body 1, communicating with each lifting slot 11. A lifting frame 13 is provided in the receiving cavity 12, and the lifting frame 13 is surrounded by... The slider and the slide rail 121 on the inner wall of the accommodating cavity 12 cooperate to achieve longitudinal sliding connection. The lifting frame 13 is driven to lift by the drive cylinder 8 set on the top of the electric furnace box 1. Several sets of lifting blocks 4 are arranged horizontally at the bottom of the lifting frame 13. Each set of lifting blocks 4 consists of two blocks and is embedded downward into a corresponding set of lifting slots 11. Each set of two lifting blocks 4 has a horizontal airflow channel 41 at one end away from each other. Several through holes are provided at the bottom of each airflow channel 41 so that the airflow channel 41 is connected to the furnace 3 through the through holes.

[0022] The electric furnace body 1 has horizontally penetrating air intake channels 5 and heat dissipation channels 6 at the front and rear ends of each set of lifting slots 11. The adjacent ends of the air intake channels 5 and heat dissipation channels 6 are respectively connected to two lifting slots 11 in a set and correspond to the opening positions of the airflow channels 41 of the two lifting blocks 4. When the drive cylinder 8 drives the lifting blocks 4 to descend through the lifting frame 13, the opening end of the airflow channel 41 of each set of lifting blocks 4 can be connected to the heat dissipation channel 6 and the air intake channel 5 respectively. One end of several heat dissipation channels 6 is connected to heat dissipation pipes 61 through a manifold 52, and hot air is discharged from the heat dissipation pipes 61. One end of several air intake channels 5 is connected to air intake pipes through a manifold 52. When the resistance furnace is performing processes such as annealing and quenching of metals, the internal temperature of its furnace chamber 3 is between 650°C and 1000°C. In this embodiment, one end of the air inlet pipe is connected to the air outlet of the fan 9 at the top of the electric furnace box 1. The fan 9 blows air into the furnace chamber 3, thereby promoting the hot air in the furnace chamber 3 to be discharged through the airflow channel 41 of the rear lifting block 4.

[0023] In this embodiment, to avoid a large gap between the lifting block 4 and the inner wall of the lifting groove 11, which could lead to a gap between the airflow channel 41 and the heat dissipation and air intake channels, causing hot air to overflow, both the heat dissipation channel 6 and the air intake channel are provided with an elastic joint assembly 7 near the lifting groove 11. The elastic joint assembly 7 includes a sleeve 71, a joint tube 72, and a spring 73. An installation groove 53 is provided at one end of both the heat dissipation channel 6 and the air intake channel for installing the sleeve 71. The joint tube 72 is horizontally slidably disposed inside the sleeve 71. One end of the joint tube 72 is supported by the spring 73, allowing the other end of the joint tube 72 to connect with the airflow channel 41 or press against the side wall of the lifting block 4. Furthermore, the outer wall of one end of the joint tube 72 is tapered, allowing the joint tube 72 to press against the opening of the airflow channel 41 under the action of the spring 73, achieving a seal. The tapered structure also facilitates the locking phenomenon between the lifting block 4 and the joint tube 72 during lifting.

[0024] In this embodiment, the lifting block 4 has a rectangular structure, and each lifting block 4 has a ring of baffle 43 at its bottom. The bottom of the lifting groove 11 has a ring of sealing groove 111 that matches the baffle 43, so that after the lifting block 4 rises, it presses upward into the sealing groove 111 through the baffle 43 to achieve sealing of the lifting groove 11.

[0025] In another embodiment, when the resistance furnace needs to perform laboratory low-temperature heating and drying processes, its operating temperature is generally below 650°C. In this case, the fan 9 at one end of the air inlet pipe can be removed, and the air outlet of the high-temperature resistant fan 9 can be connected to one end of the heat dissipation pipe 61 to dissipate heat by exhaust.

[0026] The above description is merely a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A high-efficiency heat dissipation structure of a box-type electric furnace, comprising an electric furnace box body (1), a box door (2) being arranged at the front end of the electric furnace box body (1), and a furnace chamber (3) being arranged in the electric furnace box body (1), characterized in that, The top end of the hearth (3) is transversely arranged with a plurality of groups of lifting grooves (11), each group of lifting grooves (11) is two in number and is distributed front and back, and the electric furnace box body (1) is located at the top end of the hearth (3) and is provided with a containing cavity (12), the containing cavity (12) is communicated with each lifting groove (11), and the containing cavity (12) is provided with a lifting frame (13), the lifting frame (13) is driven to lift by the driving cylinder (8) arranged on the top of the electric furnace box body (1), a plurality of groups of lifting blocks (4) are transversely arranged on the bottom of the lifting frame (13), each group of lifting blocks (4) is two in number and is respectively embedded into a corresponding group of lifting grooves (11), and the two lifting blocks (4) in each group are respectively provided with airflow channels (41) at the ends away from each other, and a plurality of through holes are respectively arranged at the bottom of each airflow channel (41); the electric furnace box body (1) is respectively provided with an air inlet channel (5) and a heat dissipation channel (6) at the front and back ends of each group of lifting grooves (11), the adjacent ends of the air inlet channel (5) and the heat dissipation channel (6) are respectively communicated with the two lifting grooves (11) in a group and correspond to the opening positions of the airflow channels (41) of the two lifting blocks (4), and after the driving cylinder (8) drives the lifting blocks (4) to descend through the lifting frame (13), the opening ends of the airflow channels (41) of each group of lifting blocks (4) are respectively communicated with the heat dissipation channel (6) and the air inlet channel (5); one end of a plurality of heat dissipation channels (6) is connected with a heat dissipation pipe (61) through a manifold (52), and one end of a plurality of air inlet channels (5) is connected with an air inlet pipe through the manifold (52), and the other end of the air inlet pipe is connected with the outlet end of the fan (9) arranged on the top of the electric furnace box body (1).

2. The high-efficiency heat dissipation structure of a box-type electric furnace according to claim 1, characterized in that, The ends of the heat dissipation channel (6) and the air inlet channel close to the lifting groove (11) are respectively provided with an elastic joint assembly (7), the elastic joint assembly (7) comprises a sleeve (71), a joint pipe (72) and a spring (73), the ends of the heat dissipation channel (6) and the air inlet channel are respectively provided with mounting grooves (53) for mounting the sleeve (71), the joint pipe (72) is horizontally slidably arranged in the sleeve (71), one end of the joint pipe (72) is supported by the spring (73), and the other end of the joint pipe (72) is abutted with the airflow channel (41) or pressed against the side wall of the lifting block (4).

3. The high-efficiency heat dissipation structure of a box-type electric furnace according to claim 2, characterized in that, The outer wall of one end of the joint pipe (72) is conical, so that the joint pipe (72) is abutted with the opening of the airflow channel (41) through the taper under the action of the spring (73) to realize sealing.

4. The high-efficiency heat dissipation structure of a box-type electric furnace according to claim 1, characterized in that, The inner wall of the hearth (3) and the inner wall of the box door (2) are respectively provided with heating elements.

5. The high-efficiency heat dissipation structure of a box-type electric furnace according to claim 1, characterized in that, The bottom of the lifting block (4) is provided with a ring-shaped retaining edge (43), and the bottom end of the lifting groove (11) is provided with a ring-shaped sealing groove (111) matched with the retaining edge (43), so that the lifting block (4) is abutted upward in the sealing groove (111) through the retaining edge (43) after being lifted, thereby sealing the lifting groove (11).

6. The high-efficiency heat dissipation structure of a box-type electric furnace according to claim 1, characterized in that, The lifting frame (13) is longitudinally slidably connected with the slide rails (121) on the inner wall of the containing cavity (12) through the sliding blocks.

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