Intermediate-frequency steel shell furnace

Abstract

The utility model relates to the technical field of medium-frequency steel shell furnaces, and discloses a medium-frequency steel shell furnace which comprises a heating tank assembly, an installation frame is arranged on the outer wall of the heating tank assembly, and a discharge valve port is formed in the inner wall of the heating tank assembly. Then, a pressing plate can be pressed downwards to enable a connecting ring and an elastic telescopic plate to displace, then a rotating disc can be rotated to enable a threaded rod to rotate and descend so as to drive an upper cover to descend, a rotating sleeve can be rotated after the upper cover descends, then the upper cover is rotated, and therefore internal threads and external threads make contact with each other for sealing; and finally, after sealing is completed, a pressing plate can be loosened to enable an elastic telescopic plate to reset and stretch, so that the elastic telescopic plate can be inserted into an adaptive rotating sleeve, the upper cover is prevented from being displaced by external force during use, and the stability of the heating tank assembly during molten material adding is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of medium-frequency steel shell furnace technology, specifically a medium-frequency steel shell furnace. Background Technology

[0002] The smelting furnace uses a 200-2500Hz medium-frequency power supply for induction heating, with a power range of 20-2500KW. Based on its characteristics, it can also be called a medium-frequency electric furnace. It is mainly used for smelting and heating precious metals such as gold, platinum, silver, copper, iron, stainless steel, aluminum alloys, and other metals. It is an ideal piece of equipment for university laboratories, research institutes, jewelry processing, and precision casting. The power supply uses imported IGBT power devices, making it more integrated and miniaturized, with an effective output power of over 90%, saving energy—60% more energy than traditional thyristor-controlled medium-frequency furnaces.

[0003] According to a dustproof medium-frequency steel shell smelting furnace (Announcement No.: CN215176953U) disclosed in the above application, the furnace cover is provided to block dust, which solves the problem that in the existing smelting furnaces, the materials to be smelted are mostly placed directly in the smelting furnace for smelting, but the furnace does not have a furnace cover at the top, which may lead to dust entering and thus affecting product quality.

[0004] However, in actual use, although the above-mentioned equipment can cover the smelting furnace with the furnace cover and buckles, the temperature of the outer wall of the smelting furnace is high during smelting. This causes the small buckles placed directly on the outer wall of the smelting furnace to undergo thermal expansion and deformation, resulting in a loose connection between the furnace cover and the smelting furnace. In view of this, we propose a medium-frequency steel shell furnace. Utility Model Content

[0005] The purpose of this invention is to provide a medium-frequency steel shell furnace to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a medium-frequency steel shell furnace, comprising a heating tank assembly, an mounting frame provided on the outer wall of the heating tank assembly, a discharge valve port provided on the inner wall of the heating tank assembly, a sealing assembly provided on the outer wall of the mounting frame, the sealing assembly comprising an elastic telescopic plate, the elastic telescopic plate being fixedly connected to the outer wall of the mounting frame, a connecting ring being fixedly connected to the outer wall of the elastic telescopic plate, a pressure plate being fixedly connected to the outer wall of the connecting ring, and a threaded rod being threadedly connected to the inner wall of the mounting frame;

[0007] A turntable is fixedly connected to the end of a threaded rod. A top cover is rotatably mounted on the end of the threaded rod. A rotating sleeve is fixedly connected to the outer wall of the top cover. An internal thread is provided on the inner wall of the top cover. An external thread is provided on the outer wall of the heating tank assembly.

[0008] Preferably, the size of the external thread is adapted to the size of the internal thread, so that the top cover can be tightly connected to the heating tank assembly.

[0009] Preferably, the center line of the upper cover and the center line of the connecting ring are on the same straight line.

[0010] Preferably, the number of rotating sleeves is several, and the several rotating sleeves are arranged in a circumferential array on the outer wall of the upper cover.

[0011] Preferably, the outer wall of the mounting frame is provided with a positioning component, the positioning component including a rotating disk, the rotating disk being rotatably mounted on the outer wall of the mounting frame, the outer wall of the rotating disk being fixedly connected to a spring telescopic rod, the end of the spring telescopic rod being fixedly connected to a horizontal plate, the outer wall of the horizontal plate being fixedly connected to an insert rod, and the outer wall of the rotating disk being provided with a positioning hole.

[0012] Preferably, the outer wall of the insertion rod is adapted to the inner wall of the positioning hole, so that the insertion rod can be smoothly inserted into the positioning hole.

[0013] Preferably, the centerline of the elastic telescopic rod and the centerline of the rotating disk are on the same straight line.

[0014] Compared with the prior art, this utility model provides a medium-frequency steel shell furnace, which has the following beneficial effects:

[0015] 1. In daily use, the turntable of this medium-frequency steel shell furnace can be rotated to make the threaded rod rotate and descend, thereby driving the upper cover to descend. After the upper cover descends, the rotating sleeve can be rotated at the same time, which will make the upper cover rotate, so that the internal thread and the external thread come into contact and seal with each other. Finally, after the seal is completed, the pressure plate can be released to allow the elastic telescopic plate to return to its original position and extend, so that the elastic telescopic plate can be inserted into the matching rotating sleeve, preventing the upper cover from being displaced by external forces during use, and ensuring the stability of the heating tank assembly when adding molten materials.

[0016] 2. In this medium-frequency steel shell furnace, after the turntable has rotated, the horizontal plate on the elastic telescopic rod can be pulled up, and then the horizontal plate and the turntable can be rotated so that the insertion rod can be aligned with the positioning hole on the turntable. Finally, the horizontal plate can be lowered so that the insertion rod can be smoothly inserted into the positioning hole, thereby further limiting the threaded rod and preventing rotational displacement when accidentally touched by external force. At the same time, the overall practicality and stability are further improved. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the elastic telescopic plate and connecting ring structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the pressure plate and turntable structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the horizontal plate and insert rod structure of this utility model.

[0021] In the diagram: 1. Mounting bracket; 2. Heating tank assembly; 3. Discharge valve port; 4. Cover assembly; 401. Elastic telescopic plate; 402. Connecting ring; 403. Pressure plate; 404. Threaded rod; 405. Turntable; 406. Top cover; 407. Rotating sleeve; 408. Internal thread; 409. External thread; 5. Positioning assembly; 501. Rotating disc; 502. Elastic telescopic rod; 503. Horizontal plate; 504. Insert rod; 505. Positioning hole. Detailed Implementation

[0022] like Figures 1-4 As shown, this utility model provides a technical solution: a medium-frequency steel shell furnace, including a heating tank assembly 2, an installation frame 1 is provided on the outer wall of the heating tank assembly 2, a discharge valve port 3 is provided on the inner wall of the heating tank assembly 2, a cover assembly 4 is provided on the outer wall of the installation frame 1, the cover assembly 4 includes an elastic telescopic plate 401, the elastic telescopic plate 401 is fixedly connected to the outer wall of the installation frame 1, a connecting ring 402 is fixedly connected to the outer wall of the elastic telescopic plate 401, a pressure plate 403 is fixedly connected to the outer wall of the connecting ring 402, and a threaded rod 404 is threadedly connected to the inner wall of the installation frame 1.

[0023] Furthermore, the turntable 405 is fixedly connected to the end of the threaded rod 404, and the end of the threaded rod 404 is rotatably mounted with an upper cover 406. The outer wall of the upper cover 406 is fixedly connected with a rotating sleeve 407, the inner wall of the upper cover 406 is provided with an internal thread 408, and the outer wall of the heating tank assembly 2 is provided with an external thread 409.

[0024] In the embodiments of this utility model, the size of the external thread 409 is adapted to the size of the internal thread 408, so that the upper cover 406 can be tightly connected with the heating tank assembly 2. The center line of the upper cover 406 and the center line of the connecting ring 402 are on the same straight line. The number of rotating sleeves 407 is several, and the several rotating sleeves 407 are arranged in a circumferential array on the outer wall of the upper cover 406.

[0025] Furthermore, the outer wall of the mounting frame 1 is provided with a positioning component 5, which includes a rotating disk 501. The rotating disk 501 is rotatably mounted on the outer wall of the mounting frame 1. An elastic telescopic rod 502 is fixedly connected to the outer wall of the rotating disk 501. A horizontal plate 503 is fixedly connected to the end of the elastic telescopic rod 502. An insertion rod 504 is fixedly connected to the outer wall of the horizontal plate 503. A positioning hole 505 is opened on the outer wall of the rotating disk 405. The outer wall of the insertion rod 504 is adapted to the inner wall of the positioning hole 505, so that the insertion rod 504 can be smoothly inserted into the positioning hole 505. The center line of the elastic telescopic rod 502 and the center line of the rotating disk 501 are on the same straight line.

[0026] In this utility model, during daily use, an appropriate amount of material can be added to the heating tank assembly 2 first. Then, the pressure plate 403 can be pressed down to displace the connecting ring 402 and the elastic telescopic plate 401. Then, the turntable 405 can be rotated to make the threaded rod 404 rotate and descend, thereby driving the upper cover 406 to descend. After the upper cover 406 descends, the rotating sleeve 407 can be rotated at the same time, thereby making the upper cover 406 rotate, so that the internal thread 408 and the external thread 409 come into contact and seal with each other. Finally, after sealing is completed, the pressure plate 403 can be released to allow the elastic telescopic plate 401 to return to its original position and extend, so that the elastic telescopic plate 401 can be inserted into the matching rotating sleeve 407, preventing the upper cover 406 from being displaced by external force during use, and ensuring the stability of the heating tank assembly 2 when adding molten material.

[0027] After the turntable 405 has rotated, the horizontal plate 503 on the elastic telescopic rod 502 can be pulled up. Then, the horizontal plate 503 and the turntable 501 are rotated so that the insertion rod 504 can be aligned with the positioning hole 505 on the turntable 405. Finally, the horizontal plate 503 can be lowered so that the insertion rod 504 can be smoothly inserted into the positioning hole 505. This further limits the threaded rod 404, preventing rotational displacement when accidentally touched by external force, and further improving the overall practicality and stability.

[0028] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A medium-frequency steel shell furnace, comprising a heating tank assembly (2), wherein an mounting bracket (1) is provided on the outer wall of the heating tank assembly (2), and a discharge valve port (3) is provided on the inner wall of the heating tank assembly (2), characterized in that: The outer wall of the mounting bracket (1) is provided with a cover assembly (4), the cover assembly (4) comprising: Elastic telescopic plate (401), the elastic telescopic plate (401) is fixedly connected to the outer wall of the mounting frame (1), the outer wall of the elastic telescopic plate (401) is fixedly connected to a connecting ring (402), the outer wall of the connecting ring (402) is fixedly connected to a pressure plate (403), and the inner wall of the mounting frame (1) is threadedly connected to a threaded rod (404). A turntable (405) is fixedly connected to the end of a threaded rod (404). A top cover (406) is rotatably mounted on the end of the threaded rod (404). A rotating sleeve (407) is fixedly connected to the outer wall of the top cover (406). An internal thread (408) is provided on the inner wall of the top cover (406). An external thread (409) is provided on the outer wall of the heating tank assembly (2).

2. An intermediate frequency steel shell furnace according to claim 1, characterized in that: The size of the external thread (409) is adapted to the size of the internal thread (408).

3. An intermediate frequency steel shell furnace as claimed in claim 1, characterized in that: The center line of the upper cover (406) and the center line of the connecting ring (402) are on the same straight line.

4. An intermediate frequency steel shell furnace as claimed in claim 1, characterized in that: The number of rotating sleeves (407) is several, and the several rotating sleeves (407) are arranged in a circular array on the outer wall of the upper cover (406).

5. An intermediate frequency steel shell furnace as claimed in claim 1, characterized in that: The outer wall of the mounting frame (1) is provided with a positioning component (5), the positioning component (5) includes a rotating disk (501), the rotating disk (501) is rotatably mounted on the outer wall of the mounting frame (1), the outer wall of the rotating disk (501) is fixedly connected with an elastic telescopic rod (502), the end of the elastic telescopic rod (502) is fixedly connected with a horizontal plate (503), the outer wall of the horizontal plate (503) is fixedly connected with an insert rod (504), and the outer wall of the turntable (405) is provided with a positioning hole (505).

6. An intermediate frequency steel shell furnace as claimed in claim 5, characterised in that: The outer wall of the insertion rod (504) is adapted to the inner wall of the positioning hole (505).

7. An intermediate frequency steel shell furnace as claimed in claim 5, characterised in that: The centerline of the elastic telescopic rod (502) and the centerline of the rotating disk (501) are on the same straight line.

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