Anti-loosening device for a kaldo furnace

Abstract

The utility model relates to mechanical engineering technical field, concretely relates to a kind of anti-loosening device for Kaldo furnace, to solve the ordinary bolt of current Kaldo furnace loose, the situation that the central body coupling and furnace body are disconnected, to cause the problem of molten metal overflow in furnace. The utility model includes screw rod, first nut, second nut, frosted surface and trapezoidal external thread, opposite trapezoidal external thread is used to the both sides of screw rod, tooth shape is isosceles trapezoid, tooth shape angle is 30 °, this type of external thread and the internal thread of screw rod are closely attached with taper surface, good process performance, high tooth root strength, good centring, effectively avoid that screw rod appears loose, and the inside of second nut is set as frosted surface, to increase the friction between second nut and the friction between the flange of central body coupling and furnace body flange adhering surface, to reach the purpose of anti-loosening.

Description

Technical Field

[0001] This utility model relates to the field of mechanical engineering technology, specifically to an anti-loosening device for a Kaldor furnace. Background Technology

[0002] In the Kaldor furnace drive system, the connection between the central coupling and the furnace body is subjected to significant stress, requiring a high-strength screw for connection. However, while ordinary screws may meet the strength requirements, they lack anti-loosening properties. Especially during furnace rotation, the screw connecting the central coupling and the furnace body is prone to loosening due to the constant rotation, necessitating regular manual tightening. High-strength tightening is required, but this is detrimental to stable furnace operation. Furthermore, if loosening is not detected promptly, the central coupling may detach from the furnace body, potentially causing molten metal to overflow due to furnace instability, posing a significant safety hazard. Utility Model Content

[0003] This invention provides an anti-loosening device for a Kaldor furnace to solve the problem that ordinary screws in Kaldor furnaces are prone to loosening, causing the central coupling to detach from the furnace body, resulting in molten material overflowing from the furnace.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An anti-loosening device for a Kaldor furnace includes a threaded rod that passes through a central coupling flange and a furnace body flange. A second nut is threaded onto the threaded rod near the central coupling flange and the furnace body flange. A first nut is threaded onto the threaded rod on the side of the second nut.

[0006] Furthermore, the screw has trapezoidal external threads at both ends, and the first nut and the second nut are both connected by trapezoidal external threads.

[0007] Furthermore, the second nut has a frosted surface on the side near the central coupling flange and the furnace body flange.

[0008] Furthermore, the screw is an 8.8 grade screw, the first nut is an 8.8 grade first nut, and the second nut is an 8.8 grade second nut, all made of medium carbon steel.

[0009] Furthermore, the trapezoidal external thread profile is an isosceles trapezoid with a thread angle of 30°.

[0010] This utility model has the following beneficial effects:

[0011] The screw of this invention features trapezoidal external threads with different helical directions at both ends. The two outermost nuts of the screw are the first nuts, with trapezoidal internal threads corresponding to the helical direction of the external threads. The internal threads of the first nuts and the trapezoidal external threads of the screw are tightly fitted together with a tapered surface, making them less prone to loosening. This design offers good processability, high root strength, and good centering. The two innermost nuts are the second nuts, with a frosted inner surface to increase the friction between the second nuts and the mating surfaces of the central coupling flange and the furnace body flange. The first and second nuts provide a double fastening effect, further preventing loosening. This device effectively solves the problem of screw loosening due to uneven force distribution during the rotation of the Kaldor furnace, ensuring the reliability of each transmission component of the Kaldor furnace and laying a solid foundation for its stable operation. It can be widely used in high-strength mechanical transmission systems. Attached Figure Description

[0012] Fig. 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Fig. 2 This is a schematic diagram of the second nut structure of this utility model.

[0014] The meanings of the reference numerals in the attached figures are as follows:

[0015] 1. Screw; 2. First nut; 3. Second nut; 4. Frosted surface; 5. Trapezoidal external thread; 6. Center coupling flange; 7. Furnace body flange. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0017] like Figs. 1-2 As shown, an anti-loosening device for a Kaldor furnace includes a screw 1 that passes through a central coupling flange 6 and a furnace body flange 7. A second nut 3 is threaded onto the screw 1 near the central coupling flange 6 and the furnace body flange 7. A first nut 2 is threaded onto the screw 1 on the side of the second nut 3.

[0018] The screw 1 has trapezoidal external threads 5 at both ends, and the first nut 2 and the second nut 3 are connected by trapezoidal external threads 5.

[0019] The second nut 3 has a frosted surface 4 on the side near the center coupling flange 6 and the furnace body flange 7.

[0020] In practical use, the screw 1 is passed through the threaded hole of the central coupling flange 6 and then aligned with the threaded hole on the furnace flange 7, so that the central coupling flange 6 and the furnace flange 7 are tightly fitted. The threads at both ends of the screw are trapezoidal external threads 5 with different helical directions. The second nut 3 is tightened on both sides of the central coupling flange 6 and the furnace flange 7, ensuring that the side of the second nut 3 with the frosted surface 4 is in contact with the central coupling flange 6 and the furnace flange 7. The frosted surface 4 can increase the friction between the second nut 3 and the contact surface of the central coupling flange 6 and the furnace flange 7, thereby achieving the purpose of preventing loosening. Then, the first nut 2 is tightened on both sides of the symmetrical second nut 3. The first nut 2 and the second nut 3 on the side of the central coupling flange 6 rotate counterclockwise, and the first nut 2 and the second nut 3 on the side of the furnace flange 7 rotate clockwise, thereby achieving a tight fit between the central coupling and the furnace body. The tightened bolts are not easy to loosen, avoiding the situation where the central coupling is separated from the furnace body.

Claims

1. An anti-loosening device for a Kaldor furnace, characterized in that: The screw (1) includes a threaded rod (1) that passes through the central coupling flange (6) and the furnace body flange (7). A second nut (3) is threaded on the screw (1) near the central coupling flange (6) and the furnace body flange (7). A first nut (2) is threaded on the screw (1) on the side of the second nut (3).

2. The anti-loosening device for a Kaldor furnace according to claim 1, characterized in that: The screw (1) has trapezoidal external threads (5) at both ends, and the first nut (2) and the second nut (3) are connected by trapezoidal external threads (5).

3. The anti-loosening device for a Kaldor furnace according to claim 1, characterized in that: The second nut (3) has a frosted surface (4) on the side near the central coupling flange (6) and the furnace body flange (7).

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