Feeding and taking device of portable resistance furnace

Abstract

The invention relates to the technical field of resistance furnaces, in particular to a feeding and taking device of a portable resistance furnace, which comprises a resistance furnace main body and a crucible main body placed in the resistance furnace main body, and further comprises a moving plate arranged on the opening side of the resistance furnace main body in a sliding manner and used for bearing an operation part of the crucible main body, according to the device, the movable plate which is arranged in a sliding mode is used for bearing an operation part, and the crucible tongs can horizontally enter and exit from a hearth of the resistance furnace main body in cooperation with the pushing part; the convenience and accuracy of feeding and taking operation are greatly improved; the crucible tongs are detachably connected with the moving plate, the separating piece is arranged, connection can be removed after clamping is completed so that the crucible tongs can be independently transferred, the operation flexibility is enhanced, the requirements of different scenes are met, the feeding and taking processes of the resistance furnace are integrally optimized, and the working efficiency and safety are improved.

Description

Technical Field

[0001] This invention relates to the field of resistance furnace technology, specifically to a portable resistance furnace feeding and unloading device. Background Technology

[0002] Resistance furnaces generate heat by passing electricity through resistance wires, and rely on refractory furnace chambers and high-precision temperature control systems to achieve high-temperature environments (up to 1800℃). They are widely used in industrial and scientific research scenarios such as metal smelting and ceramic sintering. Among them, box-type resistance furnaces have become the mainstream equipment for small and medium-sized production and laboratories due to their compact modular design (such as integrated furnace chamber and intelligent temperature control module integration) and space utilization advantages. However, current technology still relies on manual operation - workers need to manually hold crucible tongs deep into the high-temperature furnace chamber, accurately clamp the ears of the crucible filled with molten metal and remove it smoothly. This process requires extremely high operational precision, physical strength and emergency response capabilities, and there are risks such as high-temperature burns, crucible slippage or solution splashing.

[0003] To optimize the high-temperature crucible handling process, existing technologies propose two types of solutions: one is the robotic arm automation solution, which uses an external robotic arm to precisely grip the crucible deep into the resistance furnace. Although this can significantly reduce human risk, it is difficult to popularize in small and medium-sized scenarios due to the high cost of equipment procurement, customized programming, and maintenance. The other is the pallet-assisted solution, which uses a movable pallet pre-set in the furnace and uses electric or pneumatic drive components to move the crucible out of the furnace as a whole. Although this greatly reduces hardware investment, operators still need to manually hold the crucible ears with tongs for transfer, which is still quite troublesome. Therefore, we propose a portable resistance furnace loading and unloading device. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a portable electric resistance furnace loading and unloading device, comprising an electric resistance furnace body and a crucible body placed inside the electric resistance furnace body, and a movable plate slidably disposed on the open side of the electric resistance furnace body for supporting crucible body operating components. A crucible clamp is detachably connected to the movable plate for clamping or releasing the crucible body. A pushing member is provided on the outside of the electric resistance furnace body, the output end of which is drivenly connected to the movable plate for driving the movable plate to move horizontally, so that the crucible clamp extends into or exits the furnace chamber of the electric resistance furnace body. A detachment member is provided on the crucible clamp for releasing the connection between the crucible clamp and the movable plate after the crucible clamp has finished clamping, so that the crucible clamp can be moved independently.

[0005] In some embodiments, the crucible clamp includes a hollow tube connected to a movable plate. A T-shaped plate is fixedly connected to one end of the hollow tube. Two shafts are symmetrically rotatably connected to the T-shaped plate. An arc-shaped clamp is fixedly connected to each of the two shafts. The two arc-shaped clamps are aligned to clamp the crucible body.

[0006] A gear disk is fixedly connected to the shaft, and a push rod is slidably connected inside the T-shaped plate. One end of the push rod is evenly provided with multiple tooth grooves that mesh with the gear disk. Moving the push rod causes the arc-shaped clamping plate to deflect.

[0007] Furthermore, a threaded sleeve is rotatably connected inside the hollow tube, and a screw is fixedly connected to one end of the push rod. One end of the screw passes through the threaded sleeve, and a gear plate is fixedly connected to the threaded sleeve. A driving component connected to the gear plate is provided on the moving plate to drive the threaded sleeve to rotate, thereby driving the push rod to move.

[0008] In some embodiments, the pushing component includes a U-shaped frame disposed on one side of the resistance furnace body, a slide rod fixedly connected inside the U-shaped frame, one end of the slide rod slidingly passing through the moving plate, and a second shaft rotatably connected to the U-shaped frame, a second screw threaded through the moving plate fixedly connected to the second shaft, a first drive motor fixedly connected to the U-shaped frame, the output shaft of the first drive motor being fixedly connected to the second shaft, and starting the first drive motor driving the moving plate to move.

[0009] In some embodiments, a deflection plate is connected to the bottom end of the U-shaped frame, an installation frame is fixedly connected to the main body of the resistance furnace, a second drive motor is fixedly connected inside the installation frame, the output shaft of the second drive motor is fixed to one end of the deflection plate, and the second drive motor is started to drive the moving plate to deflect so as to avoid the door of the main body of the resistance furnace.

[0010] In some embodiments, the detachment component includes a U-shaped plate fixedly connected to one end of the movable plate, two hollow columns symmetrically fixedly connected to the hollow tube, and a guide groove provided on the U-shaped plate. When the hollow tube and the U-shaped plate are connected, the guide groove and the hollow column are used to guide and limit the hollow tube.

[0011] A cylinder is slidably connected inside the hollow tube, and a slot is provided on the U-shaped plate. One end of the cylinder is located in the slot to lock the hollow tube and the U-shaped plate. A lever is rotatably connected to one end of the hollow tube, and a linkage is provided between the lever and the cylinder to drive the cylinder to move and disengage from the slot when the lever is deflected.

[0012] In some embodiments, the linkage includes a sliding plate disposed inside a hollow tube, a connecting rod rotatably connected between the sliding plate and the cylinder via a rotating shaft, a shaft 3 fixedly connected to one end of the deflector plate, the shaft 3 being rotatably connected to the hollow tube, and a connecting plate fixedly connected to the shaft 3, a connecting rod 2 rotatably connected between the connecting plate and the sliding plate via a rotating shaft, and deflecting the deflector plate drives the cylinder to move;

[0013] A spring sheet is installed between the dial plate and the hollow tube. When the dial plate is deflected, the spring sheet is compressed and deformed to provide self-recovering elastic force to the dial plate.

[0014] In some embodiments, the driving component includes a drive motor three fixedly connected to a movable plate, a gear disk three fixedly connected to the output shaft of the drive motor three, and a gear disk four meshing with the gear disk three rotatably connected to the movable plate via a rotating shaft, so that the gear disk four meshes with the gear disk two while engaging the hollow tube and the U-shaped plate.

[0015] In some embodiments, a semi-arc plate is fixedly connected to one end of the U-shaped frame, an arc plate is fixedly connected to one end of the deflection plate, a T-shaped sliding protrusion is fixedly connected to one side of the semi-arc plate along its trajectory, a T-shaped sliding groove is provided on the arc plate, the sliding protrusion is located in the sliding groove and is slidably connected to its inner wall, for guiding and limiting the rotation of the U-shaped frame relative to the deflection plate.

[0016] Furthermore, a transmission component connected to the U-shaped frame is provided on the deflection plate, which is used to drive the U-shaped frame to deflect in the opposite direction by the same angle during the deflection of the deflection plate.

[0017] Placement plates are fixedly connected to both sides of the mounting frame for temporary placement of the crucible body.

[0018] In some embodiments, the transmission component includes a semicircular ring fixedly connected to one side of a semi-arc plate, with a plurality of toothed protrusions fixedly connected at equal intervals on one side of the semicircular ring. A semicircular body is fixedly connected to the mounting frame, with a plurality of toothed protrusions also fixedly connected at equal intervals on the semicircular body. A reversing gear plate is rotatably connected to the deflection plate via a rotating shaft, and the reversing gear plate meshes with the toothed protrusions.

[0019] In some embodiments, a limiting ring is fixedly connected to the crucible body. The bottom end of the limiting ring is designed with a bevel, which is used to lift the crucible body by the bevel when the arc-shaped clamping plate clamps the crucible body, so that it falls off to the bottom of the inner cavity of the resistance furnace body.

[0020] Furthermore, an L-shaped limiting plate is fixedly connected to one of the aforementioned arc-shaped clamps to limit the crucible body.

[0021] The present invention has at least the following beneficial effects:

[0022] This device uses a sliding plate to support the operating components, and together with the pushing component, it enables the crucible tongs to move horizontally in and out of the main furnace chamber of the resistance furnace, greatly improving the convenience and accuracy of loading and unloading operations. The crucible tongs and the sliding plate are detachably connected and equipped with a release mechanism, which allows the connection to be released after clamping, enabling the crucible tongs to be moved independently, enhancing operational flexibility, meeting the needs of different scenarios, and optimizing the loading and unloading process of the resistance furnace, thereby improving work efficiency and safety. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0024] Figure 2 For the present invention Figure 1 Schematic diagram of partial cross-section;

[0025] Figure 3 For the present invention Figure 2 Schematic diagram of partial cross-section;

[0026] Figure 4 For the present invention Figure 3 Schematic diagram of the structure of area A in the middle;

[0027] Figure 5 For the present invention Figure 3 Schematic diagram of partial cross-section;

[0028] Figure 6 For the present invention Figure 5 Schematic diagram of partial cross-section;

[0029] Figure 7 This is a schematic diagram of the structure of Embodiment 2 of the present invention.

[0030] In the diagram: 1-Resistant furnace body; 11-Crucible body; 2-Moving plate; 3-Crucible clamp; 4-Pushing component; 5-Disengaging component; 31-Hollow tube; 32-T-shaped plate; 33-Shaft 1; 34-Arc-shaped clamp; 35-Gear disc 1; 36-Push rod; 37-Gear groove; 38-Threaded sleeve; 39-Screw 1; 41-Gear disc 2; 42-Drive component; 43-U-shaped frame; 44-Slide rod; 45-Shaft 2; 46-Screw 2; 47-Drive motor 1; 48-U-shaped plate; 49-Hollow column; 51-Guide groove; 52-Cylinder; 53-Clamp 54-Groove; 55-Linkage component; 56-Sliding plate; 57-Linking rod one; 58-Shaft three; 59-Connecting plate; 61-Linking rod two; 62-Spring piece; 63-Drive motor three; 64-Gear disc three; 65-Gear disc four; 66-Semi-arc plate; 67-Arch plate; 68-Sliding convex; 69-Sliding groove; 71-Transmission component; 72-Semi-circular ring; 73-Gear convex; 74-Semi-circular body; 76-Reversing gear disc; 77-Limiting ring; 78-L-shaped limiting plate; 79-Placement plate; 81-Deflection plate; 82-Mounting frame; 83-Drive motor two. Detailed Implementation

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Example 1: Please refer to Figures 1-6The present invention provides a technical solution: a portable resistance furnace feeding and unloading device, comprising a resistance furnace body 1 and a crucible body 11 placed inside the resistance furnace body 1, and further comprising:

[0033] The movable plate 2 is slidably disposed on the open side of the resistance furnace body 1 and is used to support the operating components of the crucible body 11;

[0034] The crucible clamp 3 is detachably connected to the movable plate 2 and is used to clamp or release the crucible body 11.

[0035] The pusher 4 is located outside the resistance furnace body 1, and its output end is connected to the moving plate 2 for driving the moving plate 2 to move horizontally so that the crucible tongs 3 can extend into or out of the furnace chamber of the resistance furnace body 1.

[0036] The detachment component 5 is provided on the crucible clamp 3 and is used to disconnect the crucible clamp 3 from the moving plate 2 after the crucible clamp 3 has finished clamping, so that the crucible clamp 3 can be moved independently.

[0037] Specifically, this device uses a sliding movable plate 2 to support the operating components, and with the help of the pusher 4, it enables the crucible tongs 3 to move horizontally in and out of the furnace chamber of the resistance furnace body 1, which facilitates the loading and unloading of materials. The crucible tongs 3 are detachably connected to the movable plate 2 and are equipped with a release part 5, which can disconnect them from the movable plate 2 after the clamping is completed, so that the crucible tongs 3 and the crucible can be transferred independently. The overall design improves the convenience and flexibility of operation and optimizes the loading and unloading process of the resistance furnace.

[0038] The crucible clamp 3 includes a hollow tube 31 connected to the movable plate 2. A T-shaped plate 32 is fixedly connected to one end of the hollow tube 31. Two shafts 33 are symmetrically rotatably connected to the T-shaped plate 32. Arc-shaped clamps 34 are fixedly connected to both shafts 33. The two arc-shaped clamps 34 are matched to clamp the crucible body 11.

[0039] A gear plate 35 is fixedly connected to the shaft 33, and a push rod 36 is slidably connected inside the T-shaped plate 32. One end of the push rod 36 is evenly provided with multiple tooth grooves 37 that mesh with the gear plate 35. Moving the push rod 36 causes the two gear plates 35 to rotate due to the tooth grooves 37, thereby causing the arc-shaped clamping plate 34 to deflect to clamp or loosen the crucible body 11.

[0040] A threaded sleeve 38 is rotatably connected inside the hollow tube 31. One end of the push rod 36 is fixedly connected to a screw 39. One end of the screw 39 passes through the threaded sleeve 38, and the screw 39 and the threaded sleeve 38 are connected by threads. A gear plate 41 is fixedly connected to the threaded sleeve 38, and a drive component 42 connected to the gear plate 41 is provided on the moving plate 2. After the crucible clamp 3 is installed on the U-shaped plate 48, the gear plate 41 will be connected to the drive component 42. Subsequently, the drive component 42 drives the gear plate 41 to rotate, which in turn drives the threaded sleeve 38 to rotate, thereby driving the push rod 36 to move.

[0041] The pushing component 4 includes a U-shaped frame 43 disposed on one side of the resistance furnace body 1. A slide rod 44 is fixedly connected inside the U-shaped frame 43. One end of the slide rod 44 slides through the moving plate 2 to guide and limit the sliding of the moving plate 2. A shaft 45 is rotatably connected to the U-shaped frame 43. A screw 46 threaded through the moving plate 2 is fixedly connected to the shaft 45. A drive motor 47 is fixedly connected to the U-shaped frame 43. The output shaft of the drive motor 47 is fixedly connected to the shaft 45. When the drive motor 47 is started, it drives the shaft 45 to rotate, which in turn drives the screw 46 to rotate, thereby driving the moving plate 2 to move.

[0042] A deflection plate 81 is connected to the bottom of the U-shaped frame 43. An installation frame 82 is fixedly connected to the main body 1 of the resistance furnace. A second drive motor 83 is fixedly connected inside the installation frame 82. The output shaft of the second drive motor 83 is fixedly connected to one end of the deflection plate 81. When the second drive motor 83 is started, it drives the moving plate 2 and the components connected to it to deflect, so as to avoid the door of the main body 1 of the resistance furnace.

[0043] The detachment component 5 includes a U-shaped plate 48 fixedly connected to one end of the movable plate 2, and two hollow columns 49 symmetrically fixedly connected to the hollow tube 31. A guide groove 51 is provided on the U-shaped plate 48. When the hollow tube 31 and the U-shaped plate 48 are connected, the guide groove 51 and the hollow column 49 are used to guide and limit the hollow tube 31.

[0044] A cylinder 52 is slidably connected inside the hollow tube 31. A slot 53 is provided on the U-shaped plate 48. One end of the cylinder 52 is located in the slot 53 to lock the hollow tube 31 and the U-shaped plate 48. A lever 54 is rotatably connected to one end of the hollow tube 31. A linkage 55 is provided between the lever 54 and the cylinder 52. When the operator holds the hollow tube 31, the lever 54 is deflected, which drives the cylinder 52 to move and disengage from the slot 53, thereby disengaging the crucible clamp 3 from the U-shaped plate 48.

[0045] The linkage 55 includes a sliding plate 56 disposed inside the hollow tube 31. The sliding plate 56 and the cylinder 52 are rotatably connected by a connecting rod 57 via a rotating shaft. One end of the deflector 54 is fixedly connected to a shaft 58. The shaft 58 is rotatably connected to the hollow tube 31, and a connecting plate 59 is fixedly connected to the shaft 58. The connecting plate 59 and the sliding plate 56 are rotatably connected by a connecting rod 61 via a rotating shaft. The deflector 54 drives the connecting plate 59 to deflect, which in turn pulls the sliding plate 56 to move via the connecting rod 61, thereby using the connecting rod 57 to drive the cylinder 52 to move.

[0046] A spring plate 62 is installed between the lever 54 and the hollow tube 31. While the lever 54 is deflected, the spring plate 62 is compressed and deformed to provide self-recovering force to the lever 54.

[0047] The driving component 42 includes a drive motor 63 fixedly connected to the movable plate 2. A gear disk 64 is fixedly connected to the output shaft of the drive motor 63. A gear disk 65 that meshes with the gear disk 64 is rotatably connected to the movable plate 2 via a rotating shaft. While connecting the hollow tube 31 and the U-shaped plate 48, the gear disk 65 meshes with the gear disk 41. Then, the drive motor 63 is started to drive the gear disk 64 to rotate, which in turn drives the gear disk 65 to rotate, thereby driving the gear disk 41 to rotate.

[0048] A semi-arc plate 66 is fixedly connected to one end of the U-shaped frame 43, and an arc plate 67 is fixedly connected to one end of the deflection plate 81. A sliding protrusion 68 with a T-shaped cross-section is fixedly connected to one side of the semi-arc plate 66 along its trajectory. A sliding groove 69 with a T-shaped cross-section is opened on the arc plate 67. The sliding protrusion 68 is located in the sliding groove 69 and is slidably connected to its inner wall to guide and limit the rotation of the U-shaped frame 43 relative to the deflection plate 81.

[0049] Furthermore, a transmission component 71 connected to the U-shaped frame 43 is provided on the deflection plate 81, which is used to drive the U-shaped frame 43 to deflect in the opposite direction by the same angle during the deflection of the deflection plate 81. Thus, during the deflection of the deflection plate 81, the opening of the crucible body 11 can always be kept facing upward to prevent the material inside from leaking out.

[0050] Placement plates 79 are fixedly connected to both sides of the mounting frame 82 for temporarily placing the crucible body 11. After the deflection plate 81 is deflected, the crucible body 11 can be temporarily placed on the placement plate 79. Similarly, the crucible body 11 can be placed on the placement plate 79 first for the crucible tongs 3 to pick up.

[0051] The transmission component 71 includes a semicircular ring 72 fixedly connected to one side of the semicircular plate 66. Multiple toothed protrusions 73 are fixedly connected at equal intervals on one side of the semicircular ring 72. A semicircular body 74 is fixedly connected to the mounting frame 82. Multiple toothed protrusions 73 are also fixedly connected at equal intervals on the semicircular body 74. A reversing gear disk 76 is rotatably connected to the deflection plate 81 through a rotating shaft. The reversing gear disk 76 meshes with the toothed protrusions 73. During the deflection of the deflection plate 81, the reversing gear disk 76 is driven to roll along the semicircular body 74, thereby driving the semicircular ring 72 to rotate, which in turn drives the U-shaped frame 43, the moving plate 2, the crucible clamp 3, and the crucible body 11 to deflect.

[0052] Example 2: Please refer to Figures 1-7 The present invention provides a technical solution: Embodiment 2 is an optimization based on Embodiment 1;

[0053] A limiting ring 77 is fixedly connected to the crucible body 11. The bottom end of the limiting ring 77 is designed with a bevel. When the arc-shaped clamp 34 clamps the crucible body 11, the bevel of the limiting ring 77 is used to lift the crucible body 11 so that it falls off the bottom of the inner cavity of the resistance furnace body 1. This prevents the crucible body 11 from rubbing against the inner wall of the resistance furnace body 1 when the crucible clamp 3 moves the crucible body 11.

[0054] An L-shaped limiting plate 78 is fixedly connected to an arc-shaped clamping plate 34 to limit the crucible body 11.

[0055] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A loading and unloading device for a portable resistance furnace, comprising a resistance furnace body (1) and a crucible body (11) placed inside the resistance furnace body (1), characterized in that, It also includes: The movable plate (2) is slidably disposed on the opening side of the resistance furnace body (1) for supporting the operating components of the crucible body (11); The crucible tongs (3) are detachably connected to the movable plate (2) and are used to clamp or release the crucible body (11); The pusher (4) is located outside the resistance furnace body (1), and its output end is connected to the moving plate (2) for driving the moving plate (2) to move in the horizontal direction so that the crucible tongs (3) can extend into or out of the furnace chamber of the resistance furnace body (1). A release element (5) is provided on the crucible clamp (3) to release the connection between the crucible clamp (3) and the moving plate (2) after the crucible clamp (3) has finished clamping, so that the crucible clamp (3) can be moved independently.

2. The feeding and unloading device for the portable resistance furnace according to claim 1, characterized in that: The crucible clamp (3) includes a hollow tube (31) connected to the movable plate (2). A T-shaped plate (32) is fixedly connected to one end of the hollow tube (31). Two shafts (33) are symmetrically rotatably connected to the T-shaped plate (32). Arc-shaped clamps (34) are fixedly connected to both shafts (33). The two arc-shaped clamps (34) are matched to clamp the crucible body (11). A gear disk (35) is fixedly connected to the shaft (33), and a push rod (36) is slidably connected inside the T-shaped plate (32). One end of the push rod (36) is evenly provided with multiple tooth grooves (37) that mesh with the gear disk (35). Moving the push rod (36) causes the arc-shaped clamping plate (34) to deflect. A threaded sleeve (38) is rotatably connected inside the hollow tube (31). One end of the push rod (36) is fixedly connected to a screw (39). One end of the screw (39) passes through the threaded sleeve (38). A gear plate (41) is fixedly connected to the threaded sleeve (38). A drive component (42) connected to the gear plate (41) is provided on the moving plate (2) to drive the threaded sleeve (38) to rotate, thereby driving the push rod (36) to move.

3. The feeding and unloading device for the portable resistance furnace according to claim 2, characterized in that: The pusher (4) includes a U-shaped frame (43) set on one side of the resistance furnace body (1). A slide rod (44) is fixedly connected inside the U-shaped frame (43). One end of the slide rod (44) slides through the moving plate (2). A shaft two (45) is rotatably connected on the U-shaped frame (43). A screw two (46) threaded through the moving plate (2) is fixedly connected on the shaft two (45). A drive motor one (47) is fixedly connected on the U-shaped frame (43). The output shaft of the drive motor one (47) is fixedly connected to the shaft two (45). Starting the drive motor one (47) drives the moving plate (2) to move.

4. The feeding and unloading device for the portable resistance furnace according to claim 3, characterized in that: The bottom end of the U-shaped frame (43) is connected to a deflection plate (81). The main body of the resistance furnace (1) is fixedly connected to an installation frame (82). The installation frame (82) is fixedly connected to a second drive motor (83). The output shaft of the second drive motor (83) is fixed to one end of the deflection plate (81). The second drive motor (83) is started to drive the moving plate (2) to deflect so as to avoid the door of the main body of the resistance furnace (1).

5. The feeding and unloading device for the portable resistance furnace according to claim 2, characterized in that: The detachment component (5) includes a U-shaped plate (48) fixedly connected to one end of the movable plate (2), and two hollow columns (49) symmetrically fixedly connected to the hollow tube (31). A guide groove (51) is provided on the U-shaped plate (48). When the hollow tube (31) and the U-shaped plate (48) are connected, the guide groove (51) and the hollow column (49) are used to guide and limit the hollow tube (31). A cylinder (52) is slidably connected inside the hollow tube (31). A slot (53) is provided on the U-shaped plate (48). One end of the cylinder (52) is located in the slot (53) to lock the hollow tube (31) and the U-shaped plate (48). A lever (54) is rotatably connected to one end of the hollow tube (31). A linkage (55) is provided between the lever (54) and the cylinder (52) to drive the cylinder (52) to move and disengage from the slot (53) when the lever (54) is deflected.

6. The feeding and unloading device for the portable resistance furnace according to claim 5, characterized in that: The linkage (55) includes a sliding plate (56) disposed inside the hollow tube (31), a connecting rod (57) rotatably connected between the sliding plate (56) and the cylinder (52) via a rotating shaft, a shaft (58) fixedly connected to one end of the deflector (54), the shaft (58) rotatably connected to the hollow tube (31), and a connecting plate (59) fixedly connected to the shaft (58), a connecting rod (61) rotatably connected between the connecting plate (59) and the sliding plate (56) via a rotating shaft, and deflecting the deflector (54) drives the cylinder (52) to move; A spring sheet (62) is installed between the dial plate (54) and the hollow tube (31). While deflecting the dial plate (54), the spring sheet (62) is compressed and deformed to provide self-recovering force to the dial plate (54).

7. The feeding and unloading device for the portable resistance furnace according to claim 6, characterized in that: The driving component (42) includes a third driving motor (63) fixedly connected to the moving plate (2). A third gear disk (64) is fixedly connected to the output shaft of the third driving motor (63). A fourth gear disk (65) that meshes with the third gear disk (64) is rotatably connected to the moving plate (2) via a rotating shaft. When the hollow tube (31) and the U-shaped plate (48) are connected, the fourth gear disk (65) can mesh with the second gear disk (41).

8. The feeding and unloading device for the portable resistance furnace according to claim 7, characterized in that: One end of the U-shaped frame (43) is fixedly connected to a semi-arc plate (66), and one end of the deflection plate (81) is fixedly connected to an arc plate (67). A sliding protrusion (68) with a T-shaped cross-section is fixedly connected to one side of the semi-arc plate (66) along its trajectory. A sliding groove (69) with a T-shaped cross-section is provided on the arc plate (67). The sliding protrusion (68) is located in the sliding groove (69) and is slidably connected to its inner wall, which is used to guide and limit the rotation of the U-shaped frame (43) relative to the deflection plate (81). Furthermore, a transmission component (71) connected to the U-shaped frame (43) is provided on the deflection plate (81) to drive the U-shaped frame (43) to deflect in the opposite direction by the same angle during the deflection process of the deflection plate (81); Placement plates (79) are fixedly connected to both sides of the mounting frame (82) for temporarily placing the crucible body (11).

9. The feeding and unloading device for the portable resistance furnace according to claim 8, characterized in that: The transmission component (71) includes a semicircular ring (72) fixedly connected to one side of the semi-arc plate (66). A plurality of toothed protrusions (73) are fixedly connected at equal intervals on one side of the semicircular ring (72). A semicircular body (74) is fixedly connected to the mounting frame (82). A plurality of toothed protrusions (73) are also fixedly connected at equal intervals on the semicircular body (74). A reversing gear disk (76) is rotatably connected to the deflection plate (81) through a rotating shaft. The reversing gear disk (76) meshes with the toothed protrusions (73).

10. The feeding and unloading device for the portable resistance furnace according to claim 9, characterized in that: A limiting ring (77) is fixedly connected to the crucible body (11). The bottom end of the limiting ring (77) is designed with a bevel. When the arc-shaped clamp (34) clamps the crucible body (11), the bevel of the limiting ring (77) is used to lift the crucible body (11) so that it falls off the bottom of the inner cavity of the resistance furnace body (1). An L-shaped limiting plate (78) is fixedly connected to one of the arc-shaped clamps (34) to limit the crucible body (11).

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