Isothermal air circulation heat treatment electric furnace

Abstract

The invention relates to the technical field of heat treatment electric furnaces, in particular to an isothermal air circulation heat treatment electric furnace which mainly comprises a heat preservation shell and a heating mechanism, the heating mechanism is located in the heat preservation shell and comprises a heating block fixedly installed on the inner wall of the heat preservation shell, and a furnace pipe and a conveying mechanism are arranged in the heat preservation shell. The conveying mechanism is arranged in the heat preservation shell, and the fixing mechanism is arranged in the furnace pipe. A placing frame moves to make contact with a fixed block, after a second guide rail drives a clamping block to move out of a clamping groove, the clamping block does not abut against a wedge-shaped rod any more, an elastic piece, a limiting block, a limiting groove and a moving frame are arranged, so that the moving frame moves upwards to exceed a first groove body, the side face of the moving frame abuts against the placing frame, and the placing frame is limited; the metal parts in the containing frame are not prone to falling or colliding with one another, so that it is guaranteed that the materials are not prone to damage, and the quality of finished metal is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat treatment electric furnaces, and particularly to an isothermal air circulation heat treatment electric furnace. Background Art

[0002] During the metal processing, heat treatment of metals is often required. The isothermal air circulation heat treatment electric furnace is often used for the processing of metal heat treatment. This equipment can be used for the annealing, normalizing, quenching and other treatment processes of steel to improve the organizational structure and mechanical properties of steel. In the non-ferrous metal industry, the isothermal heat treatment furnace can be used for the aging treatment of materials such as aluminum alloy and copper alloy to improve the strength and hardness of the materials.

[0003] Chinese Patent Publication No. CN103397153B discloses an isothermal air circulation heat treatment electric furnace. By controlling the calorific value of the heating element and setting up the isothermal hot air channels such as the stainless steel temperature equalizing partition plate, the surface temperature of the heating element is effectively reduced, and the temperature gradient between the surface of the heating element and the stainless steel temperature equalizing partition plate is reduced. At the same time, the temperature gradient between the stainless steel temperature equalizing partition plate and the stainless steel furnace liner is also reduced, thereby improving the temperature uniformity of the furnace chamber. At the same time, the device drives the metal in the hanging basket into the stainless steel furnace liner by pulling the hanging basket with the lifting steel wire rope, so as to carry out the heat treatment processing on the metal inside the furnace liner.

[0004] However, when the device pulls the hanging basket with the lifting steel wire and moves the metal into the stainless steel furnace liner, due to the lack of necessary limiting measures for the hanging basket itself, and during the processing, the circulating fan blades blow the hanging basket, which will cause the hanging basket to shake easily during the processing, resulting in the falling or mutual collision of the metal materials in the hanging basket. Once such a situation occurs, it will not only damage the material itself, but also may have an adverse impact on the subsequent heat treatment process, ultimately affecting the quality of the finished metal. Summary of the Invention

[0005] The purpose of the present invention is to provide an isothermal air circulation heat treatment electric furnace to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: An isothermal air circulation heat treatment electric furnace, comprising: a heat preservation outer shell, a support leg is fixedly installed on the bottom surface of the heat preservation outer shell, and a door panel is movably penetrated and installed on the side surface of the heat preservation outer shell; A heating mechanism, the heating mechanism is located inside the heat preservation outer shell. The heating mechanism includes a heating block fixedly installed on the inner wall of the heat preservation outer shell. A furnace liner is arranged inside the heat preservation outer shell. A temperature equalizing shell is fixedly installed on the outer wall of the furnace liner through a connecting piece. The heating mechanism is used for heating the metal inside the furnace liner; The conveying mechanism is arranged inside the heat preservation outer shell. The conveying mechanism includes a placement frame located inside the furnace liner. A first guide rail is fixedly installed on the inner wall of the lower end of the furnace liner. A second guide rail is arranged on one side of the first guide rail. The first guide rail and the second guide rail are connected to each other and arranged along the same axis. The conveying mechanism is used for placing and taking out metals. The fixing mechanism is arranged inside the furnace liner. The fixing mechanism includes a moving frame located inside the furnace liner. A fixing block is arranged on one side of the moving frame. The fixing mechanism is used for fixing the placement frame.

[0007] Preferably, the outer wall of the temperature equalizing shell is fixedly connected to the inner wall of the heat preservation outer shell through a connecting piece. An air duct is formed between the inner wall of the temperature equalizing shell and the outer wall of the furnace liner. A plurality of through holes are formed through the bottom surface of the furnace liner.

[0008] Preferably, a motor is fixedly installed on the top surface of the heat preservation outer shell. The lower end of the output rod of the motor rotates through the outer wall of the heat preservation outer shell and the outer wall of the temperature equalizing shell and extends into the temperature equalizing shell. A wind hole is formed through the top surface of the furnace liner. A fan blade is fixedly installed on the outer wall of the lower end of the output rod of the motor. A diversion shell is fixedly installed on the inner wall of the upper end of the temperature equalizing shell. An air expansion shell is fixedly installed on the inner wall of the upper end of the furnace liner. Both the diversion shell and the air expansion shell are arranged as funnel-shaped covers.

[0009] Preferably, there are two first guide rails and two second guide rails. The bottom surfaces of the two first guide rails are fixedly connected to the inner wall of the lower end of the furnace liner. Two sliding grooves are formed on the bottom surface of the placement frame. The inner walls of the two sliding grooves are respectively slidably connected to the outer walls of the two first guide rails and the outer walls of the two second guide rails.

[0010] Preferably, a plurality of through grooves are formed through the bottom surface of the placement frame. A handle is fixedly installed on the side surface of the placement frame. Card slots are respectively formed on the top surfaces of one ends of the two first guide rails. A clamping block is fixedly installed at one end of each of the two second guide rails close to the first guide rail. A limiting plate is fixedly installed at one end of each of the two second guide rails far from the first guide rail. The side surfaces of the two clamping blocks are respectively slidably connected to the inner walls of the two card slots.

[0011] Preferably, a support frame is fixedly installed on the bottom surfaces of the two second guide rails. A rotating shaft is fixedly installed at one end of the support frame. Two mounting plates are fixedly installed on the side surface of the heat preservation outer shell. The two mounting plates are rotatably connected to the two ends of the rotating shaft through bearing seats close to the side surface. Two stoppers are respectively fixedly installed on the side surfaces of the two mounting plates close to each other. The two stoppers are arranged perpendicular to each other.

[0012] Preferably, two hinge blocks one are fixedly installed on the bottom surface of the support frame. Electric push rods are respectively hinged inside the two hinge blocks one. A support plate is fixedly connected to the same side surface of the two support legs. Two hinge blocks two are fixedly connected to the side wall of the support plate close to the two electric push rods. The two hinge blocks two are respectively rotatably connected to the ends of the two electric push rods far from the hinge blocks one.

[0013] Preferably, grooves are respectively formed on the top surfaces of the two guide rails I. A groove II is formed on the inner wall of one side of the groove I, and the groove II extends into the clamping groove. The ends of the two guide rails I away from the guide rail II are respectively fixedly connected to the sides of the two fixing blocks.

[0014] Preferably, the inner wall of the groove I is slidably connected to the outer wall of the moving frame. Two limiting blocks are fixedly installed on the side of the moving frame. Two limiting grooves are formed on the inner wall of the groove I, and the inner walls of the two limiting grooves are respectively slidably connected to the outer walls of the two limiting blocks. The inner walls of the lower ends of the two limiting blocks are respectively elastically connected to the inner walls of the lower ends of the two limiting grooves through elastic members.

[0015] Preferably, a wedge-shaped block is slidably installed on the inner wall of the groove I. The side of the moving frame is wedge-shaped. The bottom surface of the wedge-shaped block is slidably connected to the inner wall of the lower end of the moving frame. A wedge-shaped rod is fixedly installed on the side of the wedge-shaped block. The outer wall of the wedge-shaped rod is slidably connected to the inner wall of the groove II. One end of the wedge-shaped rod is slidably connected to the side of the clamping block.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: After a metal workpiece is placed in the placing frame in the present invention, the placing frame moves and contacts the fixing block. After the guide rail II drives the clamping block out of the clamping groove, the clamping block no longer abuts against the wedge-shaped rod. Through the arranged elastic members, limiting blocks, limiting grooves and moving frame, the moving frame moves upward beyond the groove I, and the side of the moving frame abuts against the placing frame. Under the combined action of the moving frame and the fixing block, the placing frame is limited. When the placing frame is blown by the fan blades, it will not shake or tilt, ensuring that the metal parts inside the placing frame are not likely to fall or collide with each other, thereby ensuring that the material itself is not easily damaged and improving the quality of the final finished metal. By driving the hinge block I and the support frame to rotate through the arranged electric push rod, the support frame drives the guide rail II to rotate, and makes the clamping block on the guide rail II coincide with the clamping groove on the guide rail I, so that the guide rail I and the guide rail II are connected. The placing frame can be pulled out of the furnace lining, facilitating the placement and removal of the metal, thereby shortening the placement and taking time and improving the processing efficiency. The inner furnace lining is insulated by the arranged heat preservation shell, reducing energy loss. The heating block heats the temperature equalizing shell, and the temperature equalizing shell heats the air inside the air duct. The hot air is blown by the fan blades and transported into the furnace lining through the air duct to heat-treat the metal. At the same time, the hot air enters the air duct again through the through holes for recycling, thereby reducing energy consumption and being more environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the overall three-dimensional structure schematic diagram of the present invention; Figure 2 is the three-dimensional structure folding schematic diagram of the guide rail II of the present invention; Figure 3 is the overall three-dimensional structure sectional schematic diagram of the present invention; Figure 4 Schematic cross-sectional view of the three-dimensional structure of the furnace liner of the present invention; Figure 5 of the present invention Figure 2 Enlarged view at location A in; Figure 6 Exploded view of the three-dimensional structure of a part of the guide rail of the present invention; Figure 7 Schematic cross-sectional view of the three-dimensional structure of a guide rail of the present invention; Figure 8 Schematic cross-sectional view of the three-dimensional structure of the moving frame of the present invention; Figure 9 Schematic three-dimensional structure diagram of the fixed state of the placement frame of the present invention; Figure 10 Schematic three-dimensional structure diagram of the support frame of the present invention.

[0018] In the figure: 1. Heat preservation shell; 101. Support leg; 102. Door panel; 2. Heating mechanism; 201. Temperature equalizing shell; 202. Furnace liner; 203. Heating block; 204. Through hole; 205. Motor; 206. Fan blade; 207. Flow guiding shell; 208. Wind expanding shell; 209. Air duct; 3. Conveying mechanism; 301. Guide rail 1; 302. Guide rail 2; 303. Card slot; 304. Card block; 305. Support frame; 306. Mounting plate; 307. Rotating shaft; 308. Stopper; 309. Hinge block 1; 310. Electric push rod; 311. Hinge block 2; 312. Support plate; 313. Placement frame; 314. Slide groove; 315. Through groove; 316. Handle; 317. Limiting plate; 4. Fixing mechanism; 401. Fixing block; 402. Groove 1; 403. Groove 2; 404. Wedge rod; 405. Wedge block; 406. Moving frame; 407. Limiting block; 408. Limiting groove; 409. Elastic member. Detailed implementation manners

[0019] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will describe the present application in detail with reference to the drawings and in combination with the embodiments.

[0020] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0021] As shown Figures 1-10 in the figure, the present application provides an isothermal air circulation heat treatment electric furnace, which includes a heat preservation housing 1. Support legs 101 are fixedly installed on the bottom surface of the heat preservation housing 1, and a door panel 102 is movably and penetratingly installed on the side surface of the heat preservation housing 1; a heating mechanism 2, the heating mechanism 2 is located inside the heat preservation housing 1. The heating mechanism 2 includes heating blocks 203 fixedly installed on the inner wall of the heat preservation housing 1. A furnace liner 202 is arranged inside the heat preservation housing 1. A temperature equalizing shell 201 is fixedly installed on the outer wall of the furnace liner 202 through a connecting member. The heating mechanism 2 is used to heat the metal inside the furnace liner 202; Specifically, as Figures 1-4 shown in the figure, the outer wall of the temperature equalizing shell 201 is fixedly connected to the inner wall of the heat preservation housing 1 through a connecting member. An air duct 209 is formed between the inner wall of the temperature equalizing shell 201 and the outer wall of the furnace liner 202. A plurality of through holes 204 are formed through the bottom surface of the furnace liner 202.

[0022] In this embodiment: by arranging the temperature equalizing shell 201, the heat of the heating blocks 203 is conducted more evenly. An air duct 209 is formed between the inner wall of the temperature equalizing shell 201 and the outer wall of the furnace liner 202, and a plurality of through holes 204 are formed through the bottom surface of the furnace liner 202, so that the hot air can be circulated and used.

[0023] Specifically, as Figures 1-4 shown in the figure, a motor 205 is fixedly installed on the top surface of the heat preservation housing 1. The lower end of the output rod of the motor 205 rotates through the outer wall of the heat preservation housing 1 and the outer wall of the temperature equalizing shell 201 and extends into the temperature equalizing shell 201. A wind hole is formed through the top surface of the furnace liner 202. A fan blade 206 is fixedly installed on the outer wall of the lower end of the output rod of the motor 205. A guide shell 207 is fixedly installed on the inner wall of the upper end of the temperature equalizing shell 201, and a wind expanding shell 208 is fixedly installed on the inner wall of the upper end of the furnace liner 202. Both the guide shell 207 and the wind expanding shell 208 are arranged as funnel-shaped covers.

[0024] In this embodiment: the hot air is blown into the furnace liner 202 by the fan blade 206 through the wind hole for processing the metal. By arranging the guide shell 207 and the wind expanding shell 208, the hot air inside the air duct 209 is guided to the wind hole through the guide shell 207 and discharged into the furnace liner 202 through the wind expanding shell 208, so that the metal inside the furnace liner 202 is heated more evenly.

[0025] a conveying mechanism 3, the conveying mechanism 3 is arranged inside the heat preservation housing 1. The conveying mechanism 3 includes a placing frame 313 located inside the furnace liner 202. A guide rail one 301 is fixedly installed on the inner wall of the lower end of the furnace liner 202. A guide rail two 302 is arranged on one side of the guide rail one 301. The guide rail one 301 and the guide rail two 302 are connected to each other and arranged along the same axis. The conveying mechanism 3 is used to place and take out the metal; Specifically, asFigures 1-10 As shown, there are two guide rails 301 and two guide rails 302. The bottom surfaces of the two guide rails 301 are fixedly connected to the inner wall of the lower end of the furnace liner 202. Two chutes 314 are provided on the bottom surface of the placement frame 313. The inner walls of the two chutes 314 are respectively slidably connected to the outer walls of the two guide rails 301 and the outer walls of the two guide rails 302.

[0026] In this embodiment: By providing the guide rails 301 and 302 and slidably connecting them with the chutes 314, the placement frame 313 can be conveniently moved, and feeding and material taking can be carried out conveniently.

[0027] Specifically, as Figures 1-10 shown, a plurality of through slots 315 are provided through the bottom surface of the placement frame 313. A handle 316 is fixedly installed on the side surface of the placement frame 313. Card slots 303 are respectively provided on the top surfaces of one ends of the two guide rails 301. Blocks 304 are respectively fixedly installed at one ends of the two guide rails 302 close to the guide rails 301. The side surfaces of the two blocks 304 are respectively slidably connected to the inner walls of the two card slots 303. The top surface of the block 304 is flush with the top surface of the guide rail 301.

[0028] In this embodiment: By providing the limit plates 317 to limit the placement frame 313, the placement frame 313 is not easily slipped off the guide rail 302. By providing the blocks 304 and the card slots 303, the guide rails 301 and 302 are connected more tightly, so that the placement frame 313 moves more stably and smoothly.

[0029] Specifically, as Figures 1-10 shown, supports 305 are fixedly installed on the bottom surfaces of the two guide rails 302. A rotating shaft 307 is fixedly installed at one end of the support 305. Two mounting plates 306 are fixedly installed on the side surface of the heat preservation shell 1. The two mounting plates 306 are rotatably connected to both ends of the rotating shaft 307 through bearing seats near the side surface. Two stoppers 308 are respectively fixedly installed on the side surfaces of the two mounting plates 306 close to each other. The two stoppers 308 are arranged perpendicular to each other.

[0030] In this embodiment: By providing the two stoppers 308 and the two stoppers 308 being arranged perpendicularly, the support 305 rotates around the rotating shaft 307. The support 305 rotates 90 degrees and contacts the stopper 308. The stopper 308 limits the support 305, so that the support 305 and the guide rail 302 rotate 90 degrees.

[0031] Specifically, as Figures 1-10As shown in the figure, two hinge blocks 309 are fixedly installed on the bottom surface of the support frame 305. Electric push rods 310 are respectively hinged inside the two hinge blocks 309. A support plate 312 is fixedly connected to the same side of the two support legs 101. Two hinge blocks 311 are fixedly connected to the side wall of the support plate 312 close to the two electric push rods 310. The two hinge blocks 311 are respectively rotatably connected to the ends of the two electric push rods 310 far from the hinge blocks 309.

[0032] In this embodiment: By arranging the electric push rods 310, the hinge blocks 309 and the support frame 305 are driven to rotate. The support frame 305 drives the guide rail 302 to rotate and connect with the guide rail 301, so as to facilitate the placing frame 313 to be moved out of the furnace liner 202 and facilitate the taking out of the workpiece.

[0033] Fixing mechanism 4, the fixing mechanism 4 is arranged inside the furnace liner 202. The fixing mechanism 4 includes a moving frame 406 located inside the furnace liner 202. A fixing block 401 is arranged on one side of the moving frame 406. The fixing mechanism 4 is used to fix the placing frame 313.

[0034] Specifically, as Figures 1-9 shown, a groove 402 is respectively opened on the top surfaces of the two guide rails 301. A groove 403 is opened on the inner wall of one side of the groove 402. The groove 403 extends into the clamping groove 303. The ends of the two guide rails 301 far from the guide rail 302 are respectively fixedly connected to the side surfaces of the two fixing blocks 401.

[0035] In this embodiment: By arranging the two fixing blocks 401, one side of the placing frame 313 is limited.

[0036] Specifically, as Figures 1-9 shown, the inner wall of the groove 402 is slidably connected to the outer wall of the moving frame 406. Two limiting blocks 407 are fixedly installed on the side surface of the moving frame 406. Two limiting grooves 408 are opened on the inner wall of the groove 402. The inner walls of the two limiting grooves 408 are respectively slidably connected to the outer walls of the two limiting blocks 407. The inner walls of the lower ends of the two limiting blocks 407 are respectively elastically connected to the inner walls of the lower ends of the two limiting grooves 408 through elastic members 409.

[0037] In this embodiment: The moving frame 406 arranged is used to abut and support the side surface of the placing frame 313, and together with the fixing block 401, the placing frame 313 is not prone to shaking and offset.

[0038] Specifically, as Figures 1-9As shown, a wedge block 405 is slidably installed on the inner wall of the first trough body 402. The side surface of the moving frame 406 is wedge-shaped. The bottom surface of the wedge block 405 is slidably connected to the inner wall of the lower end of the moving frame 406. A wedge rod 404 is fixedly installed on the side surface of the wedge block 405. The outer wall of the wedge rod 404 is slidably connected to the inner wall of the second trough body 403. One end of the wedge rod 404 is slidably connected to the side surface of the clamping block 304.

[0039] In this embodiment: When the wedge rod 404 moves under the extrusion of the clamping block 304, it drives the wedge block 405 to move and extrude the moving frame 406, so that the moving frame 406 moves down to the inside of the first trough body 402 and is flush with the top surface of the first guide rail 301, ensuring that the placement frame 313 moves more smoothly and stably.

[0040] Specifically, the set heat preservation outer shell 1 insulates the inner furnace liner 202 to reduce energy loss. The set heating block 203 heats the temperature equalizing shell 201, and the temperature equalizing shell 201 heats the air inside the air duct 209. The hot air is blown by the fan blade 206 and transported from the air duct 209 into the inside of the furnace liner 202 to heat-treat the metal. At the same time, the hot air enters the air duct 209 again through the through hole 204 for recycling, thereby reducing energy consumption and being more environmentally friendly. The set electric push rod 310 drives the first hinge block 309 and the support frame 305 to rotate. The support frame 305 drives the second guide rail 302 to rotate, and makes the clamping block 304 on the second guide rail 302 coincide with the clamping groove 303 on the first guide rail 301. When the wedge rod 404 moves under the extrusion of the clamping block 304, it drives the wedge block 405 to move and extrude the moving frame 406, so that the moving frame 406 moves down to the inside of the first trough body 402 and is flush with the top surface of the first guide rail 301. Thus, the first guide rail 301 and the second guide rail 302 are connected, and the placement frame 313 can be pulled out of the inside of the furnace liner 202, facilitating the placement and removal of the metal, thereby shortening the placement and taking time and improving the processing efficiency. After the metal processing parts are placed in the placement frame 313, the placement frame 313 moves and contacts the fixed block 401. After the clamping block 304 is driven by the second guide rail 302 to move out of the clamping groove 303, the clamping block 304 no longer abuts against the wedge rod 404. Through the set elastic member 409, limiting block 407, limiting groove 408 and moving frame 406, the moving frame 406 moves up beyond the first trough body 402, and the side surface of the moving frame 406 abuts against the placement frame 313. Together with the fixed block 401, the placement frame 313 is limited. When the placement frame 313 is blown by the fan blade 206, it will not shake or skew, ensuring that the metal parts inside the placement frame 313 are not easily dropped or collided with each other, thereby ensuring that the material itself is not easily damaged and improving the quality of the final finished metal.

[0041] Those of ordinary skill in the art should understand that the discussion of any of the above embodiments is merely exemplary; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity.

[0042] The present invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An isothermal air circulation heat treatment electric furnace, comprising: Heat preservation shell (1), a support leg (101) is fixedly installed on the bottom surface of the heat preservation shell (1), and a door panel (102) is movably and penetratingly installed on the side surface of the heat preservation shell (1), characterized in that, Heating mechanism (2), the heating mechanism (2) is located inside the heat preservation shell (1), the heating mechanism (2) includes a heating block (203) fixedly installed on the inner wall of the heat preservation shell (1), a furnace liner (202) is arranged inside the heat preservation shell (1), a temperature equalizing shell (201) is fixedly installed on the outer wall of the furnace liner (202) through a connecting piece, and the heating mechanism (2) is used for heating the metal inside the furnace liner (202); Conveying mechanism (3), the conveying mechanism (3) is arranged inside the heat preservation shell (1), the conveying mechanism (3) includes a placement frame (313) located inside the furnace liner (202), a guide rail one (301) is fixedly installed on the inner wall of the lower end of the furnace liner (202), a guide rail two (302) is arranged on one side of the guide rail one (301), the guide rail one (301) and the guide rail two (302) are connected to each other and arranged along the same axis, and the conveying mechanism (3) is used for placing and taking out the metal; Fixing mechanism (4), the fixing mechanism (4) is arranged inside the furnace liner (202), the fixing mechanism (4) includes a moving frame (406) located inside the furnace liner (202), and a fixing block (401) is arranged on one side of the moving frame (406), and the fixing mechanism (4) is used for fixing the placement frame (313).

2. The isothermal air circulation heat treatment electric furnace according to claim 1, characterized in that, The outer wall of the temperature equalizing shell (201) is fixedly connected to the inner wall of the heat preservation shell (1) through a connecting piece, a wind channel (209) is formed between the inner wall of the temperature equalizing shell (201) and the outer wall of the furnace liner (202), and a plurality of through holes (204) are formed through the bottom surface of the furnace liner (202).

3. An isothermal air circulation heat treatment electric furnace according to claim 2, characterized in that, A motor (205) is fixedly installed on the top surface of the heat preservation shell (1), the lower end of the output rod of the motor (205) rotates through the outer wall of the heat preservation shell (1) and the outer wall of the temperature equalizing shell (201) and extends into the temperature equalizing shell (201), a wind hole is formed through the top surface of the furnace liner (202), a fan blade (206) is fixedly installed on the outer wall of the lower end of the output rod of the motor (205), a guide shell (207) is fixedly installed on the inner wall of the upper end of the temperature equalizing shell (201), and a wind expanding shell (208) is fixedly installed on the inner wall of the upper end of the furnace liner (202), and both the guide shell (207) and the wind expanding shell (208) are arranged as funnel-shaped covers.

4. The isothermal air circulation heat treatment electric furnace according to claim 1, characterized in that, Both the guide rail one (301) and the guide rail two (302) are provided with two, the bottom surfaces of the two guide rail ones (301) are fixedly connected to the inner wall of the lower end of the furnace liner (202), two sliding grooves (314) are formed in the bottom surface of the placement frame (313), and the inner walls of the two sliding grooves (314) are respectively slidably connected to the outer walls of the two guide rail ones (301) and the outer walls of the two guide rail twos (302).

5. An isothermal air circulation heat treatment electric furnace according to claim 4, wherein A plurality of through grooves (315) are formed through the bottom surface of the placement frame (313), a handle (316) is fixedly installed on the side surface of the placement frame (313), clamping grooves (303) are respectively formed in the top surfaces of one ends of the two guide rails one (301), clamping blocks (304) are respectively fixedly installed at one ends of the two guide rails two (302) close to the guide rail one (301), limiting plates (317) are respectively fixedly installed at one ends of the two guide rails two (302) far from the guide rail one (301), and the side surfaces of the two clamping blocks (304) are respectively in sliding connection with the inner walls of the two clamping grooves (303).

6. The isothermal air circulation heat treatment electric furnace according to claim 5, characterized in that, Two support frames (305) are fixedly installed on the bottom surface of the two guide rails two (302), a rotating shaft (307) is fixedly installed at one end of the support frame (305), two mounting plates (306) are fixedly installed on the side surface of the heat preservation shell (1), the two mounting plates (306) are rotatably connected to the two ends of the rotating shaft (307) through bearing seats on the side close to each other, two stoppers (308) are respectively fixedly installed on the side surfaces of the two mounting plates (306) close to each other, and the two stoppers (308) are arranged perpendicular to each other relatively.

7. An isothermal air circulation heat treatment electric furnace according to claim 6, characterized in that, Two hinge blocks one (309) are fixedly installed on the bottom surface of the support frame (305), electric push rods (310) are respectively hinged inside the two hinge blocks one (309), a support plate (312) is fixedly connected to the same side surface of the two support legs (101), two hinge blocks two (311) are fixedly connected to the side walls of the support plate (312) close to the two electric push rods (310), and the two hinge blocks two (311) are respectively rotatably connected to one ends of the two electric push rods (310) far from the hinge blocks one (309).

8. An isothermal air circulation heat treatment electric furnace according to claim 5, characterized in that, Grooves one (402) are respectively formed in the top surfaces of the two guide rails one (301), a groove two (403) is formed in one inner wall of the groove one (402), the groove two (403) extends into the clamping groove (303), and one ends of the two guide rails one (301) far from the guide rail two (302) are respectively fixedly connected to the side surfaces of the two fixing blocks (401).

9. An isothermal air circulation heat treatment electric furnace according to claim 8, characterized in that, The outer wall of the moving frame (406) is in sliding connection with the inner wall of the groove one (402), two limiting blocks (407) are fixedly installed on the side surface of the moving frame (406), two limiting grooves (408) are formed in the inner wall of the groove one (402), the outer walls of the two limiting grooves (408) are respectively in sliding connection with the outer walls of the two limiting blocks (407), and the inner walls of the lower ends of the two limiting blocks (407) are respectively elastically connected to the inner walls of the lower ends of the two limiting grooves (408) through elastic members (409).

10. An isothermal air circulation heat treatment electric furnace according to claim 9, characterized in that, A wedge block (405) is slidably installed on the inner wall of the groove one (402), the side surface of the moving frame (406) is arranged in a wedge shape, the bottom surface of the wedge block (405) is in sliding connection with the inner wall of the lower end of the moving frame (406), a wedge rod (404) is fixedly installed on the side surface of the wedge block (405), the outer wall of the wedge rod (404) is in sliding connection with the inner wall of the groove two (403), and one end of the wedge rod (404) is in sliding connection with the side surface of the clamping block (304).

Images