A protection device for an intermediate frequency induction furnace
By designing protective devices, including protective nets and warning lines, on the medium-frequency induction furnace, the risk of operators falling into the air when the furnace tipps over is eliminated, achieving both safety and convenient maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI GILDA ELECTROMECHANICAL EQUIP CO LTD
- Filing Date
- 2025-07-21
- Publication Date
- 2026-05-29
AI Technical Summary
During the pouring of molten metal in a medium-frequency induction furnace, the square plate may separate from the edge of the pit, posing a high risk of operators falling into the void and increasing the danger of the operating environment.
A protective device was designed, including a pit, an induction furnace body, an overlapping plate, a protective net, and a connecting plate, which are connected by a rotating shaft. The protective net covers the pit when the induction furnace tilts. Combined with a warning line and an infrared sensor, it alerts the operator, reduces the risk of falling into the pit, and the protective net can be cleaned with a brush.
It effectively reduces the possibility of operators falling into the pit, improves the safety of the medium frequency induction furnace, and reduces the risk of debris entering the pit through the design of the protective net, which facilitates maintenance and cleaning.
Smart Images
Figure CN224302711U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of induction furnace protection, and in particular to a protective device for medium-frequency induction furnaces. Background Technology
[0002] An intermediate frequency induction furnace is a power supply device that converts 50Hz AC power into intermediate frequency (300Hz to 1000Hz). It rectifies three-phase AC power into DC power, then converts the DC power into adjustable intermediate frequency current, which is supplied to the intermediate frequency alternating current flowing through the capacitor and induction coil. This generates high-density magnetic lines of force in the induction coil, which cut the metal material placed in the induction coil and generate large eddy currents in the metal material.
[0003] Currently, the medium-frequency induction furnace is equipped with a square plate for connecting to external structures. The furnace is situated in a pit, and during the melting process, the square plate covers the pit to prevent operators from stepping into empty spaces. When the molten metal is poured out, the furnace tilts and rotates to discharge the liquid metal.
[0004] Regarding the aforementioned technologies, the inventors believe that during the pouring of molten metal in the medium-frequency induction furnace, the square plate connected to the furnace will separate from the edge of the pit, exposing the pit to the working environment. This increases the risk of operators falling into the pit and raises the danger of the working environment. Utility Model Content
[0005] To ensure safety during the use of a medium-frequency induction furnace, this application provides a protective device for a medium-frequency induction furnace.
[0006] The protective device for a medium-frequency induction furnace provided in this application adopts the following technical solution:
[0007] A protective device for a medium-frequency induction furnace includes a pit, an induction furnace body, and an overlapping plate. The induction furnace body is disposed in the pit, and the overlapping plate is connected to the outer wall of the induction furnace body. When the induction furnace body is in a vertical position, the edge of the overlapping plate overlaps the surface of the pit. The device also includes a connecting plate and a protective net. The connecting plate is connected to the bottom surface of the overlapping plate. A rotating shaft is provided on each opposite side of the overlapping plate, and the two rotating shafts correspond one-to-one with two opposite vertical inner walls of the pit. The overlapping plate is connected to the pit via the rotating shafts. The corresponding vertical inner wall of the pit is rotatably connected, and the protective net is connected to the bottom surface of the connecting plate. The protective net includes a fan-shaped protective frame and an arc-shaped protective frame. The fan-shaped protective frame is vertically and parallelly arranged on both sides of the induction furnace body. The straight line where the rotating shaft is located intersects with the center of the fan-shaped protective frame. The two fan-shaped protective frames are arranged close to the two opposite vertical inner walls of the pit. The arc-shaped protective frame is arranged between the two fan-shaped protective frames and connected to the two fan-shaped protective frames. The fan-shaped protective frame is arranged close to one of the vertical side walls of the pit.
[0008] By adopting the above technical solution, when the induction furnace body rotates, the protective net rotates upward through the connecting plate. The protective net covers the outside of the induction furnace body and is set inside the pit, thus surrounding the inside of the pit and reducing the possibility of workers falling into the pit. Through the cooperation of the pit, the induction furnace body, the protective net, and the connecting plate, the pit is effectively surrounded, ensuring safety during the use of the medium-frequency induction furnace.
[0009] Optionally, the arc-shaped protective frame includes a fixed frame and a sliding frame. The top of the fixed frame is connected to the bottom surface of the connecting plate, and the two vertical sides of the fixed frame are connected to the two fan-shaped protective frames. The sliding frame is slidably disposed between the two fan-shaped protective frames, and the inner arc wall of the sliding frame is slidably fitted with the outer arc wall of the fixed frame.
[0010] By adopting the above technical solution, the arc-shaped protective frame is divided into two parts: a fixed frame and a sliding frame. During normal use, the fixed frame and the sliding frame are in an unfolded state. When maintenance of the induction furnace body is required, the sliding frame is slid upwards along the outside of the fixed frame, facilitating maintenance of the induction furnace body by the operator.
[0011] Optionally, a sliding arc groove is provided on one side of the two fan-shaped protective frames that are close to each other. The sliding arc groove is provided one-to-one with the two vertical sides of the sliding frame. Sliding rollers are provided on the two vertical sides of the sliding frame that are close to each other. The sliding rollers are slidably disposed in the corresponding sliding arc grooves.
[0012] By adopting the above technical solution, the sliding arc groove and sliding roller configuration help the sliding frame slide smoothly between the two sector-shaped protective frames.
[0013] Optionally, a snap-fit opening is provided on the top and bottom edges of the sliding frame, and a receiving groove is provided on the outer wall of the bottom edge of the fixed frame. A snap-fit block is slidably disposed in the receiving groove, and an elastic element is provided in the receiving groove. One side of the snap-fit block extends out of the receiving groove and snaps into the corresponding snap-fit opening under the action of the elastic element.
[0014] By adopting the above technical solution, under normal working conditions, the snap-fit block is embedded in the snap-fit opening located above. When the induction furnace body is being repaired, the snap-fit block is pushed into the receiving groove and the sliding frame is slid upward until the snap-fit opening below corresponds to the snap-fit block. Under the action of the elastic element, the snap-fit block is embedded in the snap-fit opening, thereby achieving the limitation of the sliding frame.
[0015] Optionally, a warning line is provided along the circumferential direction at the edge of the pit.
[0016] By adopting the above technical solution, the warning line marks the edge of the foundation pit, enabling workers to identify the edge of the pit and reducing the possibility of workers stepping into a hole.
[0017] Optionally, several infrared sensors are installed on the warning line.
[0018] By adopting the above technical solution, the infrared sensor detects the area around the foundation pit and sends a signal and alarm when someone crosses the warning line, thus alerting people in the surrounding area.
[0019] Optionally, a baffle is provided circumferentially on the inner wall of the foundation pit, and the baffle is disposed in the gap between the foundation pit and the protective net.
[0020] By adopting the above technical solution, an annular baffle is set between the inner wall of the pit and the protective net to block the gap between the two, reducing the possibility that debris in the working environment will fall into the pit through the gap when the induction furnace body is tilted.
[0021] Optionally, a brush is provided on the inner wall of the baffle, and the brush is fitted into the protective net.
[0022] By adopting the above technical solution, the brush sweeps the surface of the protective net as it rotates with the overlapping plate, thus cleaning the protective net.
[0023] In summary, this application includes at least one of the following beneficial technical effects:
[0024] 1. Through the cooperation of the foundation pit, the induction furnace body, the protective net and the overlapping plate, the foundation pit is surrounded, which has the effect of ensuring safety during the use of the medium frequency induction furnace;
[0025] 2. A ring-shaped baffle is installed between the inner wall of the pit and the protective net to block the gap between the two, reducing the possibility that debris in the working environment will fall into the pit through the gap when the induction furnace body is tilted.
[0026] 3. As the protective net rotates with the overlapping plate, the brush sweeps the surface of the protective net, thus cleaning the protective net. Attached Figure Description
[0027] Figure 1 This is a schematic diagram illustrating the structure of a protective device for a medium-frequency induction furnace, as described in this application.
[0028] Figure 2 This is a schematic diagram illustrating the structure of the protective net in the embodiments of this application.
[0029] Figure 3 This is a structural diagram used in the embodiments of this application to illustrate the internal structure of the foundation pit.
[0030] Figure 4 yes Figure 3 Enlarged view of section B in the middle.
[0031] Figure 5 yes Figure 3 Enlarged view of section C.
[0032] Figure 6 yes Figure 2 Enlarged view of part A in the middle.
[0033] Explanation of reference numerals in the attached drawings: 1. Foundation pit; 2. Induction furnace body; 3. Overlap plate; 4. Protective net; 41. Fan-shaped protective frame; 42. Arc-shaped protective frame; 421. Fixed frame; 422. Sliding frame; 43. Snap-fit spring; 44. Snap-fit block; 5. Connecting plate; 6. Connecting inner frame; 7. Connecting outer frame; 8. Connecting bolt; 9. Rotating shaft; 10. Sliding arc groove; 11. Sliding roller; 12. Snap-fit opening; 13. Receiving groove; 14. Baffle; 15. Brush; 16. Warning line; 17. Infrared sensor. Detailed Implementation
[0034] The following is in conjunction with the appendix Figure 1-6 This application will be further described in detail below. Embodiments of this application provide a protective device for a medium-frequency induction furnace, which provides safety during the use of the medium-frequency induction furnace.
[0035] Reference Figure 1-3A protective device for a medium-frequency induction furnace includes a pit 1, an induction furnace body 2, an overlapping plate 3, and a protective net 4. The induction furnace body 2 is disposed in the pit 1. The overlapping plate 3 is fixedly connected to the outer wall of the induction furnace body 2. When the induction furnace body 2 is in a vertical state, the edge of the overlapping plate 3 overlaps the surface of the pit 1. A connecting plate 5 is connected to the outer wall of the induction furnace body 2, and the connecting plate 5 is connected to the bottom surface of the overlapping plate 3. The area of the connecting plate 5 is smaller than the area of the overlapping plate 3. A rotating shaft 9 is horizontally connected to each opposite side of the connecting plate 5, and the two rotating shafts 9 are located on the same straight line. The two rotating shafts 9 correspond one-to-one with the two opposite vertical inner walls of the pit 1 and are rotatably connected. A drive source (not shown in the attached drawings) for driving the rotation of the induction furnace body 2 is provided in the pit 1.
[0036] Reference Figure 2-4 The protective net 4 is set on the outside of the induction furnace body 2 and on the bottom surface of the connecting plate 5. The top of the protective net 4 is connected to the inner frame 6, and the bottom surface of the connecting plate 5 is connected to the outer frame 7. The inner frame 6 is inserted into the outer frame 7, and several connecting bolts 8 are threaded on the outer frame 7. One end of the connecting bolt 8 extends into the inner frame 7 and is threadedly connected to the inner frame 6.
[0037] Reference Figure 2 , Figure 3 and Figure 5 The protective net 4 includes a fan-shaped protective frame 41 and an arc-shaped protective frame 42. One fan-shaped protective frame 41 is vertically installed on each of the opposite sides of the induction furnace body 2, and the two fan-shaped protective frames 41 are arranged parallel to each other. The center of each fan-shaped protective frame 41 intersects the line containing the rotating shaft 9. The arc-shaped protective frame 42 connects the arc-shaped sides of the two fan-shaped protective frames 41 and includes an arc-shaped fixed frame 421 and a sliding frame 422. The two vertical sides of the fixed frame 421 connect to the arc-shaped sides of the two fan-shaped protective frames 41, and the top edge of the fixed frame 421 connects to the connecting inner frame 6. The inner arc wall of the sliding frame 422 slides and fits against the outer arc wall of the fixed frame 421, and the two opposite vertical sides of the sliding frame 422 correspond one-to-one with and slide to the two fan-shaped protective frames 41. Figure 6 A sliding arc groove 10 corresponding to the side of the sliding frame 422 is provided on the side of the fan-shaped protective frame 41 near the sliding frame 422. A sliding roller 11 is provided on the vertical side of the sliding frame 422, and the sliding roller 11 is rotatably connected in the corresponding sliding arc groove 10. A snap-fit opening 12 is provided on the top and bottom edges of the sliding frame 422. A receiving groove 13 corresponding to the snap-fit opening 12 is provided on the bottom edge of the fixed frame 421 near the sliding frame 422. A snap-fit spring 43 is connected to the bottom wall of the receiving groove 13. A snap-fit block 44 is connected to the end of the snap-fit spring 43 away from the inner wall of the receiving groove 13. The snap-fit block 44 is slidably disposed in the receiving groove 13 and is embedded in the corresponding snap-fit opening 12.
[0038] Reference Figure 1 , Figure 3 and Figure 4 Two fan-shaped protective frames 41 are installed next to two opposite vertical inner walls of the pit 1, and an arc-shaped protective frame 42 is installed next to one of the vertical inner walls of the pit 1. A baffle 14 is circumferentially connected to the inner wall of the pit 1, and the baffle 14 is positioned in the gap between the protective frame and the inner wall of the pit 1. A brush 15 is installed on the inner side of the baffle 14, and the brush 15 is fitted against the side wall of the protective net 4. A warning line 16 is circumferentially installed on the top surface of the pit 1, and several infrared sensors 17 are installed on the warning line 16.
[0039] Reference Figure 1-3 When the induction furnace body 2 is tilted, the connecting plate 5 and the overlapping plate 3 rotate around the rotating shaft 9. This moves the protective net 4 connected to the connecting plate 5 above the pit 1, enclosing the pit 1 and reducing the possibility of workers falling into it. The warning line 16 serves as a warning to workers, further reducing the possibility of them falling. Infrared sensors monitor the area near the warning line 16 and issue an alarm when someone is detected approaching, reminding workers not to approach.
[0040] Reference Figure 4-6 When maintenance is required on the induction furnace body 2, the sliding frame 422 can be slid upwards, and the sliding roller 11 slides in the sliding arc groove 10, which helps the sliding frame 422 slide more smoothly. When the locking block 44 corresponds to the locking opening 12 below the sliding frame 422, the locking block 44 is embedded in the corresponding locking opening 12 under the action of the locking spring 43, thus positioning the sliding frame 422. On the other hand, the connecting bolt 8 can be removed, the inner connecting frame 6 can be taken out from the outer connecting frame 7, and the protective net 4 can be removed from the connecting plate 5 as a whole, which facilitates the replacement and maintenance of the protective net 4.
[0041] Reference Figure 2 and Figure 4 The baffle 14 is set in the gap between the foundation pit 1 and the protective net 4, which reduces the possibility of debris outside the foundation pit 1 falling into the foundation pit 1 through the gap. When the protective net 4 moves, the brush 15 sweeps the surface of the protective net 4, thus cleaning the protective net 4.
[0042] The implementation principle of a protective device for a medium-frequency induction furnace in this embodiment is as follows: When the induction furnace body 2 is tilted, the connecting plate 5 and the overlapping plate 3 rotate accordingly. This causes the protective net 4 connected to the connecting plate 5 to move above the pit 1. The protective net 4 surrounds the pit 1, reducing the possibility of workers falling into the pit 1. When maintenance of the induction furnace body 2 is required, the sliding frame 422 can be slid upwards. When the locking block 44 corresponds to the locking opening 12 below the sliding frame 422, the locking block 44 is embedded in the corresponding locking opening 12 under the action of the locking spring 43, thus achieving the positioning of the sliding frame 422.
[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A protective device for a medium-frequency induction furnace, comprising a pit (1), an induction furnace body (2), and an overlapping plate (3), wherein the induction furnace body (2) is disposed in the pit (1), and the overlapping plate (3) is connected to the outer wall of the induction furnace body (2), wherein when the induction furnace body (2) is in a vertical state, the edge of the overlapping plate (3) overlaps the surface of the pit (1), characterized in that: It also includes a connecting plate (5) and a protective net (4). The connecting plate (5) is connected to the bottom surface of the overlapping plate (3). A pivot (9) is provided on each of the opposite sides of the overlapping plate (3). The two pivots (9) are respectively provided with the two vertical inner walls of the pit (1). The overlapping plate (3) is rotatably connected to the corresponding vertical inner wall of the pit (1) through the pivots (9). The protective net (4) is connected to the bottom surface of the connecting plate (5). The protective net (4) includes a fan-shaped protective frame (41) and an arc-shaped protective frame. (42) The fan-shaped protective frame (41) is vertically and parallelly arranged on both sides of the induction furnace body (2). The straight line where the rotating shaft (9) is located intersects with the center of the fan-shaped protective frame (41). The two fan-shaped protective frames (41) are arranged close to the two vertical inner walls of the pit (1). The arc-shaped protective frame (42) is arranged between the two fan-shaped protective frames (41) and connected to the two fan-shaped protective frames (41). The fan-shaped protective frame (41) is arranged close to one of the vertical side walls of the pit (1).
2. The protective device for a medium-frequency induction furnace according to claim 1, characterized in that: The arc-shaped protective frame (42) includes a fixed frame (421) and a sliding frame (422). The top of the fixed frame (421) is connected to the bottom surface of the connecting plate (5). The two vertical sides of the fixed frame (421) are connected to the two fan-shaped protective frames (41). The sliding frame (422) is slidably disposed between the two fan-shaped protective frames (41). The inner arc wall of the sliding frame (422) is slidably attached to the outer arc wall of the fixed frame (421).
3. A protective device for a medium-frequency induction furnace according to claim 2, characterized in that: The two fan-shaped protective frames (41) are provided with sliding arc grooves (10) on their sides that are close to each other. The sliding arc grooves (10) are provided in correspondence with the two vertical sides of the sliding frame (422). Sliding rollers (11) are provided on the two vertical sides of the sliding frame (422) respectively. The sliding rollers (11) are slidably disposed in the corresponding sliding arc grooves (10).
4. A protective device for a medium-frequency induction furnace according to claim 2, characterized in that: The sliding frame (422) has a snap-fit opening (12) on its top and bottom edges. The fixed frame (421) has a receiving groove (13) on its bottom outer wall. A snap-fit block (44) is slidably disposed in the receiving groove (13). An elastic element is disposed in the receiving groove (13). One side of the snap-fit block (44) extends out of the receiving groove (13) under the action of the elastic element and snaps into the corresponding snap-fit opening (12).
5. A protective device for a medium-frequency induction furnace according to claim 1, characterized in that: The edge of the foundation pit (1) is provided with a warning line (16) along the circumferential direction.
6. A protective device for a medium-frequency induction furnace according to claim 5, characterized in that: Several infrared sensors (17) are installed on the warning line (16).
7. A protective device for a medium-frequency induction furnace according to claim 1, characterized in that: A baffle (14) is provided along the circumferential direction on the inner wall of the foundation pit (1), and the baffle (14) is provided in the gap between the foundation pit (1) and the protective net (4).
8. A protective device for a medium-frequency induction furnace according to claim 7, characterized in that: A brush (15) is provided on the inner wall of the baffle (14), and the brush (15) is attached to the protective net (4).