Automatic power-off device for box-type furnace

Abstract

The utility model discloses an automatic power-off device for a box-type furnace. The automatic power-off device comprises a fixed part, a convex part, a fixed bolt and an adjusting bolt, the fixed part is matched with the convex part and is sleeved on a rotating shaft of the furnace door; the fixing part and the protruding part are fixed through the fixing bolt. An adjusting hole is formed in the fixing part, and the adjusting bolt penetrates through the adjusting hole to abut against a rotating shaft of the furnace door. By using a split mode, the device can be additionally arranged at any position of a rotating shaft of old equipment or new equipment, and is not influenced by surface rusting or paint spraying treatment of the rotating shaft. Meanwhile, the limiting device can be mounted on a rotating shaft with any length, and the angle can be randomly adjusted, so that the reliability of the limiting device is ensured. And during later maintenance, the device can be detached or replaced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automatic control of heat treatment furnace, in particular to a box -type furnace automatic power off device. BACKGROUND

[0002] Box -type furnace (sometimes also be called as muffle furnace or box -type electric furnace) is a kind of general heating equipment widely used in multiple fields. Its main application fields include metal processing, ceramics, glass and new materials and so on. And most of the existing box -type furnace cannot automatically power off and close heating after furnace door opening, so some will additionally be installed by welding or nesting on rotating shaft Power-off device. However, this design faces removal difficulty during later maintenance, especially the rotating shaft is prone to rust after long time use and high temperature baking, so that the secondary adjustment of the limiting block cannot be carried out. In addition, some box -type furnaces are not equipped with the function of rotating shaft when leaving factory, and the rotating shaft needs to be disassembled for later installation, which has become an impossible task for some long-service-life equipment. SUMMARY

[0003] The utility model aims at providing a box -type furnace automatic power off device to realize installation at any position of the rotating shaft of old equipment or new equipment without being affected by the rusting of the surface of rotating shaft or paint treatment.

[0004] To solve the above technical problems, the utility model provides a box -type furnace automatic power off device, which comprises a fixed part, a protruding part, a fixing part and an adjusting part.

[0005] The fixed part and the protruding part are matched and installed and are sleeved on the rotating shaft of the furnace door.

[0006] The fixed part and the protruding part are fixed by the fixing part.

[0007] The adjusting hole is arranged on the fixed part, and the adjusting part abuts against the rotating shaft of the furnace door through the adjusting hole.

[0008] Further, the outer surface of the protruding part is provided with a protruding part, when the protruding part is located at the first position and the furnace door is closed, the protruding part presses down the travel switch of the furnace door, and the box -type furnace is powered on.

[0009] Further, the fixing part is a fixed bolt, and the adjusting part is an adjusting bolt.

[0010] Further, the adjusting hole is arranged at the central part of the fixed part, and the inside is provided with a thread matched with the adjusting part for installation.

[0011] Further, the adjusting part passes through the adjusting hole and contacts the rotating shaft of the furnace door to fix the automatic power-off device on the rotating shaft of the furnace door.

[0012] Further, both ends of the fixed part are provided with fixing holes.

[0013] Further, both ends of the convex part are provided with fixing grooves.

[0014] Further, the fixing members are distributed in pairs on both ends of the fixed part and pass through the fixing holes and the fixing grooves on the convex part to fix the fixed part and the convex part.

[0015] Compared with the prior art, the utility model has at least the following beneficial effects:

[0016] The utility model discloses a split type, so that the device can be installed at any position of the rotating shaft of old equipment or new equipment, and is not influenced by the rust on the surface of the rotating shaft or paint treatment. Meanwhile, the device can be installed on the rotating shaft of any length and can be adjusted at will, thereby ensuring the reliability of the limiting device. In the later maintenance, the device can also be easily removed or replaced. In addition, the design of the detachable split type limiting device adopts a cam type, so that the matched travel switch can be installed at a position far away from the furnace door, thereby reducing the baking of the hot gas of the furnace door, prolonging the service life of the travel switch and ensuring the reliability of the travel switch in the use. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a cross section structure schematic view of the utility model box type furnace automatic power-off device;

[0018] Figure 2 It is an installation position schematic view of the utility model box type furnace automatic power-off device;

[0019] Figure 3 It is a specific installation mode schematic view of the utility model box type furnace automatic power-off device. DETAILED DESCRIPTION

[0020] The utility model box type furnace automatic power-off device will be described in more detail below in conjunction with the schematic view, wherein the preferred embodiment of the utility model is shown, and it should be understood that the utility model described herein can be modified by those skilled in the art, and the advantageous effects of the utility model can still be achieved. Therefore, the following description should be understood as extensive knowledge for those skilled in the art, and not as a limitation on the utility model.

[0021] The utility model will be described in more detail in the following paragraphs with reference to the drawings. The advantages and features of the utility model will be more apparent according to the following description and claims. It should be noted that the drawings are very simplified and all use non-precise proportions, only to facilitate, clear and assist the purpose of describing the utility model embodiments.

[0022] AsFigure 1 The utility model discloses an automatic power-off device of box furnace, including fixed part 2, convex part 1, fixed part 3 and adjusting part 4.

[0023] Specifically, the fixed part 3 is a fixed bolt, and the adjusting part 4 is an adjusting bolt. The fixed part 2 and the convex part 1 are matched and sleeved on the rotating shaft of the furnace door. Compared with the traditional installation mode, the utility model divides the whole device into two parts, and installs the device in a mode of embracing positioning and then combination and fixation. The device can save installation time and adapt to rotating shafts of furnace doors of different specifications. The fixed part 2 and the convex part 1 are fixed by penetrating the fixed part 3 through the fixed holes arranged at two ends of the fixed part 2 and the fixed slots arranged at two ends of the convex part 1.

[0024] In a specific embodiment, as shown in Figure 2 The automatic power-off device needs to be installed on a box furnace, and the furnace door rotating shaft of the box furnace has been rusted and cannot be normally removed from the box furnace. Therefore, the fixed part 2 and the convex part 1 need to be sleeved on the furnace door rotating shaft of the box furnace respectively during installation, and then the fixed part 2 and the convex part 1 are simply fixed by the fixed part 3. As shown in Figure 3 The adjusting part 4 is used to firmly fix the device and the rotating shaft. When the furnace door is opened, the convex part 1 deviates from the first position, the travel switch 6 is triggered, the power supply is cut off, and accidents such as wire breakage caused by dry burning of the box furnace are prevented.

[0025] Specifically, the fixed part 2 is provided with an adjusting hole 5, and the adjusting bolt 4 is penetrated through the adjusting hole 5 and abuts against the rotating shaft of the furnace door. When the adjusting bolt 4 is difficult to fix due to rust and other reasons on the rotating shaft, a gasket is arranged between the adjusting bolt 4 and the rotating shaft, and then the adjusting bolt 4 is tightened to ensure that the adjusting bolt 4 presses the gasket on the rotating shaft, so that the adjusting bolt 4 can fix the whole device and the rotating shaft.

[0026] In another specific embodiment, as shown in Figure 3When the box furnace needs to open the furnace door, the winch fixed on the rotating shaft rotates to tighten the iron chain connected with the furnace door, and slowly lifts and opens the furnace door. The automatic power-off device is fixed on the rotating shaft and rotates with the rotating shaft, so that the protruding part 1 of the automatic power-off device is separated from the first position, the travel switch 6 originally pressed by the protruding part 1 is lifted, and the circuit is powered off. When the box furnace closes the furnace door, the rotating shaft rotates in the opposite direction, the winch lowers the furnace door to close the furnace door, at this time, the automatic power-off device rotates with the rotating shaft, the protruding part 1 returns to the first position, the travel switch 6 is pressed, the circuit is powered on, and the box furnace is normally heated.

[0027] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. An automatic power-off device for a box-type furnace, characterized in that: The fixed part, the protruding part, the fixing member and the adjusting member are included; The fixed part and the protruding part are matched and installed, and are sleeved on the rotating shaft of the oven door; The fixed part and the protruding part are fixed through the fixing member; The adjusting member is arranged on the fixed part and is in contact with the rotating shaft of the oven door through the adjusting hole.

2. The automatic power-off device for a box furnace according to claim 1, wherein An outer surface of the protruding part is provided with a protruding part position, when the protruding part position is located at the first position and the oven door is closed, the protruding part position presses down the travel switch of the oven door, and the box-type furnace is powered on.

3. The automatic power-off device for a box furnace according to claim 1, wherein The fixing member is a fixing bolt, and the adjusting member is an adjusting bolt.

4. The automatic power-off device for a box furnace according to claim 1, wherein The adjusting hole is arranged at the central position of the fixed part, and the inside is provided with a thread matched with the adjusting member.

5. The automatic power-off device for a box furnace according to claim 1, wherein The adjusting member is in contact with the rotating shaft of the oven door through the adjusting hole, and the automatic power-off device is fixed on the rotating shaft of the oven door.

6. The automatic power-off device for a box furnace according to claim 1, wherein Both ends of the protruding part are provided with fixing grooves.

7. The automatic power-off device for a box furnace according to claim 6, wherein Both ends of the fixed part are provided with fixing holes.

8. The automatic power-off device for a box furnace according to claim 7, wherein The fixing member is arranged in pairs at both ends of the fixed part, and passes through the fixing hole and the fixing groove on the protruding part to fix the fixed part and the protruding part.

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