Steel ball heat treatment furnace capable of reducing heat loss

Abstract

A steel ball heat treatment furnace capable of reducing heat loss comprises a furnace body, a discharging pipe is arranged on the furnace body, a first gate and a second gate are arranged on the discharging pipe in the length direction at intervals, an opening and closing door is arranged at the end of the discharging pipe, and when the discharging pipe inclines, the first gate, the second gate and the opening and closing door are sequentially opened for discharging. According to the steel ball heat treatment furnace capable of reducing the heat loss, the amount of cold air entering the furnace during discharging can be reduced, and then the situation that the temperature of steel balls in the furnace is reduced, and hardening and tempering are affected is avoided.

Description

Technical Field

[0001] The utility model relates to a steel ball heat treatment furnace, in particular to a steel ball heat treatment furnace which can reduce heat loss. Background Art

[0002] The steel ball heat treatment furnace is used to heat the steel balls to a certain temperature. After the steel balls reach this temperature, they are poured into water for rapid cooling to achieve quenching and tempering. In actual operation, it takes about half an hour to pour out all the steel balls in the furnace. Since the discharge port is open and the hot and cold air convection inside and outside causes the temperature of the steel balls in the steel ball heat treatment furnace to decrease during the pouring process, the temperature is lower than the set temperature after pouring out, resulting in poor quenching and tempering effect of the steel balls.

[0003] Although the prior art proposes to intermittently close the opening and closing door on the discharge port to achieve the purpose of reducing the amount of air entering and cooling, as long as the discharge port is opened to pour materials, cold air will inevitably enter, which will still cause the temperature of the steel balls in the heat treatment furnace to drop. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a steel ball heat treatment furnace which can reduce heat loss. When the heat treatment furnace is unloaded, multiple gates are opened in turn so that convection of cold and hot air inside and outside the steel ball heat treatment furnace is not formed, which greatly reduces heat loss in the furnace and ensures that the temperature of the steel balls after unloading meets the tempering requirements.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A steel ball heat treatment furnace capable of reducing heat loss comprises a furnace body, a discharge pipe is arranged on the furnace body, a first gate and a second gate are arranged at intervals along the length direction of the discharge pipe, an opening and closing door is arranged at the end of the discharge pipe, when the discharge pipe is tilted, the first gate, the second gate and the opening and closing door are opened in sequence to discharge.

[0007] The first gate and the second gate have the same structure, both including a flap, a lever and a counterweight block, which form an integral part with a rotating shaft, and the rotating shaft is rotatably mounted on the discharge pipe; a transmission shaft is installed between the levers of the first gate and the second gate, and a crank is installed on the transmission shaft, and the crank drives the two levers alternately.

[0008] The outer end of the opening and closing door is fixedly connected to the swing rod, the middle of the swing rod is rotatably mounted on the bracket, the other end of the swing rod is hinged to the electric push rod, and the electric push rod is rotatably mounted on the bracket.

[0009] The utility model provides a steel ball heat treatment furnace which can reduce heat loss and has the following technical effects:

[0010] 1) By adopting the first gate, the second gate and the opening and closing door, they can be opened in turn during unloading, so that when the steel balls are discharged, the first gate is in a closed state, avoiding the cold air outside the furnace from entering the furnace during unloading. During the unloading process, the steel balls in the furnace still maintain a high temperature state within the set range, and achieve a better tempering effect in the later tempering process.

[0011] 2) By citing the valve plate structure in the patent "A high-temperature ash conveying double-layer flap valve" with application number "201820898429.0", the above mechanism can not only adapt to high-temperature working conditions, but also control two sets of flaps for intermittent movement through one motor, which not only meets actual needs but also saves the cost of redesign; in addition, compared with the pull-out plate body, the mechanism and control are simplified. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0013] Figure 1 It is a schematic diagram of the utility model.

[0014] Figure 2 for Figure 1 A partial enlarged schematic diagram of the middle discharge pipe.

[0015] Figure 3 This is a schematic diagram of the working state of the utility model (the first gate is opened).

[0016] Figure 4 It is a schematic diagram of the working process of the utility model.

[0017] In the figure: a discharge pipe 1, a first gate 2, a second gate 3, an opening and closing door 4, a flap 5, a lever 6, a counterweight 7, a rotating shaft 8, a transmission shaft 9, a crank 10, a rocker arm 11, and an electric push rod 12. DETAILED DESCRIPTION

[0018] like Figure 1 As shown, a steel ball heat treatment furnace capable of reducing heat loss comprises a furnace body, a discharge pipe 1 is arranged on the furnace body (the discharge pipe 1 is in a non-rotating form when the furnace body heats the steel ball), a first gate 2 and a second gate 3 are arranged at intervals along the length direction of the discharge pipe 1, and both the first gate 2 and the second gate 3 are high temperature resistant gates to avoid deformation due to heat. An opening and closing door 4 is arranged at the end of the discharge pipe 1, and the opening and closing door 4 opens or closes the end of the discharge pipe 1.

[0019] like Figure 4As shown, the furnace body is in a horizontal state when working, and is in an inclined state when unloading is required. When unloading, the first gate 2 is first opened and the second gate 3 is in a closed state. The steel ball enters the discharge pipe 1 between the first gate 2 and the second gate 3. Subsequently, the first gate 2 is closed, and then the second gate 3 is opened, so that the steel ball enters the discharge pipe 1 between the second gate 3 and the opening and closing door 4. After opening the second gate 3, the opening and closing door 4 can be opened immediately. After all the steel balls are moved out, the second gate 3 is closed, and the opening and closing door 4 is closed immediately. Since the first gate 2 closes the furnace body of the steel ball heat treatment furnace when the opening and closing door 4 is opened for unloading, the hot and cold air inside and outside the furnace body cannot form convection, so that the steel balls in the furnace body are always kept within a certain temperature range, ensuring that the temperature of the steel balls is higher than the preset value, and ensuring that the tempering effect of pouring into cold water is ideal.

[0020] The first gate 2 and the second gate 3 can adopt the valve plate structure in the patent "A high-temperature ash conveying double-layer flap valve" with application number "201820898429.0". The first gate 2 and the second gate 3 have the same structure, both including a flap 5, a lever 6 and a counterweight 7, the flap 5, the lever 6 and the counterweight 7 form a whole with a rotating shaft 8, and the rotating shaft 8 can be rotatably installed on the discharge pipe 1; a transmission shaft 9 is installed between the levers 6 of the first gate 2 and the second gate 3, and a crank 10 is installed on the transmission shaft 9, and the crank 10 alternately shifts the two levers 6, and the crank 10 is driven by a motor.

[0021] like Figure 2-3 As shown, when the motor drives the transmission shaft 9 to rotate counterclockwise, the crank 10 drives the lever 6 of the first gate 2 to rotate clockwise, so that the flap 5 at the first gate 2 rotates clockwise to open. The steel ball rolls out and falls into the middle cavity. When the crank 10 continues to rotate, the crank 10 is separated from the lever 6 of the first gate 2, and under the downward gravity of the counterweight 7 (the counterweight of the counterweight 7 is determined according to actual needs and needs to meet the closing requirements), the first gate 2 is reset and closed. When the crank 10 continues to rotate a certain angle, the lever 6 of the second gate 3 is moved to open the flap 5 of the second gate 3 clockwise, and the steel ball is removed again. At this time, the opening and closing door 4 is opened, and the steel ball can directly roll out through the port of the discharge pipe 1 into the water for quenching and tempering.

[0022] By controlling the rotation speed of the motor, the intermittent opening speed of the first gate 2 and the second gate 3 can be adjusted in turn.

[0023] like Figure 2-3As shown, the outer end of the opening and closing door 4 is fixedly connected to the swing rod 11, the swing rod 11 is Z-shaped, the first inflection point of the swing rod 11 is rotatably mounted on the bracket through a pin, and the bracket is fixed on the discharge pipe 1. The other end of the swing rod 11 is hinged to the electric push rod 12, and the outer shell of the electric push rod 12 is rotatably mounted on the bracket through a pin. The bracket is fixed on the discharge pipe 1. When it is necessary to open, the rod body of the electric push rod 12 is retracted, and the opening and closing door 4 is opened; when it is necessary to close, the rod body of the electric push rod 12 is extended again, and the opening and closing door 4 is pressed tightly against the end of the discharge pipe 1.

[0024] The electric push rod 12 can also be replaced by a hydraulic cylinder or a gas cylinder. The specific structure of the opening and closing door 4 is set according to actual conditions.

[0025] The discharge port of the device is only suitable for discharging materials, and is not suitable for both feeding and discharging materials.

Claims

1. A steel ball heat treatment furnace capable of reducing heat loss, characterized in that: The furnace body comprises a furnace body, on which a discharge pipe (1) is provided, a first gate (2) and a second gate (3) are arranged at intervals along the length direction of the discharge pipe (1), and an opening and closing door (4) is arranged at the end of the discharge pipe (1); when the discharge pipe (1) is tilted, the first gate (2), the second gate (3), and the opening and closing door (4) are opened in sequence to discharge the material.

2. A steel ball heat treatment furnace capable of reducing heat loss according to claim 1, characterized in that: The first gate (2) and the second gate (3) have the same structure, and both comprise a flap (5), a lever (6) and a counterweight (7); the flap (5), the lever (6) and the counterweight (7) form an integral body with a rotating shaft (8); the rotating shaft (8) is rotatably mounted on the discharge pipe (1); a transmission shaft (9) is mounted between the levers (6) of the first gate (2) and the second gate (3); a crank (10) is mounted on the transmission shaft (9); and the crank (10) drives the two levers (6) in turn.

3. A steel ball heat treatment furnace capable of reducing heat loss according to claim 1, characterized in that: The outer end of the opening and closing door (4) is fixedly connected to the swing rod (11), the middle of the swing rod (11) is rotatably mounted on the bracket, the other end of the swing rod (11) is hinged to the electric push rod (12), and the electric push rod (12) is rotatably mounted on the bracket.

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