Hoisting device and rapid charging and discharging system for box-type trolley-type heat treatment furnace

Abstract

The utility model discloses a rapid charging and discharging system for a box-type trolley-type heat treatment furnace. The rapid charging and discharging system comprises a heat treatment box, a furnace door, a heat treatment trolley, a hoisting device and a material frame, the heat treatment box comprises a box body and a heating device; a furnace door is arranged at one end of the box body, a heat treatment trolley is arranged at the bottom of the box body, a hoisting device is arranged above the heat treatment trolley when the heat treatment trolley is in a charging and discharging state, and the material frame is used for filling materials (workpieces) and is positioned in the hoisting device when being subjected to heat treatment along with the heat treatment workpieces and in the charging and discharging state. The system provided by the utility model can realize one-time clamping, realizes quick charging or discharging of the hoisting device, and has the advantages of simplicity in operation, low operation intensity, safety, reliability and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat treatment, and in particular relates to a hoisting device and a system for quickly loading and unloading a box-type trolley-type heat treatment furnace. Background Art

[0002] 1. Heat treatment

[0003] 1. Heat treatment process:

[0004] Workpieces (castings, forgings, structural parts, etc.) generally need to go through a heat treatment process to fully exert their performance advantages. The heat treatment process includes normalizing (air cooling, etc.), tempering, quenching (mist cooling, water quenching, oil quenching, quenching liquid, etc.), annealing, etc. Heat treatment is a process in which the workpiece is heated to a certain temperature and then cooled in different ways to obtain different mechanical properties.

[0005] 2. Heat treatment process:

[0006] The heat treatment process includes stacking the workpieces in a heat treatment furnace in a certain manner, heating them in a sealed heat treatment furnace according to a predetermined heating temperature and insulation time, then taking the workpieces out of the heat treatment furnace and cooling them to room temperature according to a predetermined cooling method.

[0007] 3. Heat treatment furnace:

[0008] Due to the diversity of heat treatment process types and the shapes and sizes of heat-treated workpieces, heat treatment furnace types and structures are also varied. There are many ways to classify heat treatment furnaces, and different classification methods represent different characteristics:

[0009] (1) According to the mechanization method: roller hearth furnace, walking beam furnace, trolley furnace, external mechanized chamber furnace, chain furnace, rotary hearth furnace, vibrating hearth furnace, bell furnace, etc.;

[0010] (2) According to the highest temperature: furnace temperature greater than 1000℃ is a high-temperature heat treatment furnace; 650-1000℃ is a medium-temperature heat treatment furnace; below 650℃ is a low-temperature heat treatment furnace;

[0011] (3) According to the main types of heat treatment processes: chemical heat treatment furnaces such as solution treatment, quenching, normalizing, tempering, annealing and carburizing;

[0012] (4) According to the production operation mode: periodic and continuous heat treatment furnaces;

[0013] (5) According to the heating method: direct heating method, such as open flame furnace, etc.; indirect heating method, such as radiation tube furnace, muffle furnace, etc.;

[0014] (6) According to the heating source: there are coal-fired furnaces, oil-fired furnaces and gas-fired furnaces that use fuel combustion as the heat source; in addition, there are resistance furnaces, electrode furnaces, induction heating furnaces, etc. that use electrical energy as the heat source;

[0015] (7) According to the heating medium in the furnace, there are: gas as the heating medium, such as air, flue gas, controlled atmosphere, vacuum, etc.; liquid as the heating medium, such as molten salt, molten lead, etc.; solid as the heating medium, such as fluidized particle furnace, etc.

[0016] Commonly used heat treatment furnaces include box-type resistance furnaces, pit-type resistance furnaces, gas carburizing furnaces and salt bath furnaces.

[0017] This device is mainly used for box-type trolley-type (electric, gas, oil, etc.) heat treatment furnaces.

[0018] 2. The methods and problems of loading and unloading trolley-type heat treatment furnaces:

[0019] 1. The loading and unloading methods of the trolley-type heat treatment furnace are different according to the size of the casting. If there is only one casting or workpiece on the trolley, the loading and unloading method is to lift the single piece, using tools such as hooks; if a furnace needs to be loaded with castings or workpieces of various sizes, a pallet is required. First, place the casting or workpiece on the pallet, and then use a hook or a homemade simple lifting tool to lift the pallet to complete the loading or unloading action.

[0020] 2. The main problems with the current furnace loading and unloading methods:

[0021] (1) When a single piece (single tray) is unloaded (loaded) from the furnace, it requires manual auxiliary hooks, and is exposed to high temperature baking when unloading, which has low safety;

[0022] (2) Low furnace discharge efficiency. Due to the use of manual auxiliary hooks, the hooking time is long under high temperature conditions, which seriously affects the furnace discharge efficiency;

[0023] (3) Due to the long manual hanging time, the furnace temperature cannot meet the process requirements, affecting the quality of heat treatment. Utility Model Content

[0024] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a lifting device and a system for quickly loading and unloading a box-type trolley-type heat treatment furnace. The utility model can achieve one-time clamping and quick loading and unloading.

[0025] In order to achieve the above technical objectives, the utility model adopts the following technical solutions:

[0026] A lifting device comprises a lifting frame, a movable clamping block, a forward and backward travel switch, a motor, a motor speed regulating box, a bar gear, a backward travel switch, a gear, a control electric box, a heat insulation baffle, and a lifting hole; the lifting hole is arranged on the upper part of the lifting frame, and the heat insulation baffles are arranged on both sides of the lower part of the lifting frame; the movable clamping block, the forward and backward travel switch, the motor, the motor speed regulating box, the bar gear, the backward travel switch, and the gear are all arranged at the bottom of the lifting frame, and the control electric box is connected to the heat insulation baffle through a circuit.

[0027] Furthermore, the movement of the movable clamp is completed by the motor driving the bar teeth.

[0028] Furthermore, rolling bearing casters are designed between the movable clamping blocks.

[0029] Furthermore, the movable clamp and the rolling bearing caster are installed in a travel sleeve, and the travel trajectory is controlled by the sleeve.

[0030] The utility model also provides a system for quickly loading and unloading a box-type trolley-type heat treatment furnace, comprising a heat treatment box, a furnace door, a heat treatment trolley, a lifting device, and a material frame; a furnace door is provided at one end of the heat treatment box, a heat treatment trolley is provided at the bottom of the heat treatment box 1, a lifting device is provided above the heat treatment trolley, and the material frame is provided inside the lifting device.

[0031] Furthermore, the heat treatment box includes a box body and a heating device.

[0032] Furthermore, the length of the material frame is the same as the effective width of the heat treatment trolley, and the width is 1 / 2 or 1 / 3 of the effective length of the heat treatment trolley.

[0033] Furthermore, the diameters of the material frame columns and beams are both 50-70 mm.

[0034] Furthermore, the material frame is integrally cast, and the manufacturing materials include heat-resistant steel, carbon steel or cast iron.

[0035] Furthermore, the width of the lifting step of the material frame is 300-500 mm.

[0036] The utility model has the following beneficial effects:

[0037] The box-type trolley-type heat treatment furnace rapid loading and unloading system of the utility model can be clamped once, realizing rapid loading and unloading of the hoisting device, and has the advantages of simple operation, low operation intensity, safety and reliability, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural schematic diagram of a system for rapid loading and unloading of a box-type trolley-type heat treatment furnace of the utility model;

[0039] Figure 2 It is a schematic diagram of the three-dimensional structure of the lifting device and the material frame;

[0040] Figure 3 It is a three-dimensional structural diagram of the other side of the lifting device and the material frame;

[0041] Figure 4 It is a side view structural diagram of the lifting device and the material frame;

[0042] Figure 5 It is a schematic diagram of the overhead structure of the lifting device and the material frame;

[0043] Figure 6 It is a schematic diagram of the material frame structure;

[0044] Figure 7 This is a simplified diagram of the heat treatment of a box-type trolley;

[0045] Figure 8 It is a schematic diagram of the furnace loading platform;

[0046] Fig. 9 This is the main view of the hoisting device and furnace loading platform;

[0047] Fig.10 It is a schematic diagram of the bottom structure of the A-A section of the lifting device. DETAILED DESCRIPTION

[0048] The following is further described in detail by specific implementation modes in conjunction with the accompanying drawings:

[0049] like Figure 1-6 As shown, a system for quickly loading and unloading a box-type trolley-type heat treatment furnace comprises a heat treatment box 1, a furnace door 2, a heat treatment trolley 3, a lifting device 4, and a material frame 5; a furnace door 2 is provided at one end of the heat treatment box 1, a heat treatment trolley 3 is provided at the bottom of the heat treatment box 1, a lifting device 4 is provided above the heat treatment trolley 3, and the material frame 5 is provided inside the lifting device 4.

[0050] The heat treatment box 1 includes a box body 101 and a heating device 102 .

[0051] The hoisting device 4 includes a hoisting frame 401, a movable clamping block 402, a forward and backward travel switch 403, a motor 404, a motor speed regulating box 405, a bar tooth 406, a backward travel switch 407, a gear 408, a control electric box 409, a heat insulation baffle 410, and a hoisting hole 411; the hoisting frame 401 is provided with a hoisting hole 411 on the upper part, and the hoisting frame 401 is provided with heat insulation baffles 410 on both sides of the lower part; the movable clamping block 402, the forward and backward travel switch 403, the motor 404, the motor speed regulating box 405, the bar tooth 406, the backward travel switch 407, and the gear 408 are all arranged at the bottom of the hoisting frame 401, and the control electric box 409 is connected to the heat insulation baffle 410 through a circuit.

[0052] In order to make the utility model more open and comprehensive, the following further describes:

[0053] (1) Trolley-type heat treatment

[0054] like Figure 7 As shown, the trolley-type heat treatment furnace mainly includes a heat treatment trolley, a box, a furnace door, a heating device, etc. The heat treatment trolley mainly carries the workpiece (casting) and enters and exits the box. The box, the furnace door, and the heat treatment trolley form a relatively sealed space. The box is equipped with a heating device, which can be electric heating or gas heating. When the furnace door is opened, the heat treatment trolley can enter and exit the heat treatment furnace box. When the furnace door is closed, the heat treatment furnace is in a closed heating or insulation state.

[0055] (2) Furnace loading platform

[0056] like Figure 8 The loading (unloading) platform refers to placing the workpiece (casting) to be heat treated on the material frame, and pre-placing the material frame according to the position of the trolley-type heat treatment furnace during heat treatment, so as to facilitate one-time lifting by the lifting device.

[0057] The plane dimensions of the furnace loading platform are the same length and width as the effective dimensions of the heat treatment trolley of the trolley-type heat treatment furnace. It can be made of steel structure with a height of about 1 meter, which is convenient for manual operation.

[0058] (3) Material frame

[0059] like Figure 6 The material frame is an auxiliary tooling specially used to place workpieces (castings) that need heat treatment. The length of the material frame is the same as the effective width of the heat treatment trolley, and the width is 1 / 2 or 1 / 3 of the effective length of the trolley, which is determined according to the size of the trolley and the heat treatment workpiece. A lifting step is set at the bottom of the frame.

[0060] The dimensions of the material frame columns and beams are designed according to the total weight of the material, generally with a diameter of 50-70 mm. The material frame is cast as a whole, and the manufacturing material can be selected from heat-resistant steel (suitable for high-temperature heat treatment above 1000 degrees), carbon steel or cast iron according to the heat treatment temperature.

[0061] (4) Lifting device control system

[0062] 1) The control system of the lifting device includes:

[0063] It consists of a control box, a motor and a motor speed regulating box.

[0064] 2) The control box is equipped with four control switches: "main switch", "forward", "reverse" and "emergency stop".

[0065] (5) Working principle of lifting device

[0066] 1) The movable clamp mainly serves as a material frame;

[0067] 2) The "forward movement" of the movable clamp will extend into the lifting step of the material frame, and the crane can lift the material frame; after the crane places the material frame on the heat treatment trolley (or the furnace unloading platform), the "backward movement" of the movable clamp will leave the material frame in place;

[0068] 3) The action of the movable clamp is completed by the motor driving the bar teeth;

[0069] 4) The "forward" or "backward" travel of the movable clamp is controlled by the "backward travel switch" and the "forward travel switch". The specific travel is determined by the width of the material frame lifting step, which is generally designed to be 300-500 mm;

[0070] 5) In order to reduce the resistance of the movable clamping block, rolling bearing casters are designed between the clamping blocks (see Fig. 9 , 10 );

[0071] 6) The movable clamp and rolling bearing caster are installed in the travel sleeve, and the travel trajectory is controlled by the sleeve (see Fig. 9 , 10 ).

[0072] (6) How to use the lifting device to load the furnace

[0073] 1) After the material frame is loaded with materials, it is placed on the furnace loading platform;

[0074] 2) Use a crane to lift the hoisting device and place it on the furnace loading platform;

[0075] 3) The lifting device is connected to a normal 220V AC power supply;

[0076] 4) Start the main switch of the control box and press the "forward" button. The movable clamp will move forward. After it stops moving forward, the crane will lift the material frame to the heat treatment trolley and place it on the trolley.

[0077] 5) Press the "Back" button on the control box, the movable clamp moves back, and the material frame is placed on the heat treatment trolley. The crane lifts the lifting device and moves it away to complete a furnace loading operation.

[0078] (7) How to use the lifting device after it is taken out of the furnace:

[0079] 1) The door of the heat treatment furnace is opened, and the trolley is moved out of the heat treatment furnace to the designated position;

[0080] 2) The crane lifts the lifting device and places it on the trolley;

[0081] 3) The lifting device is connected to a normal 220V AC power supply;

[0082] 4) Start the main switch of the control box and press the "forward" button. The movable clamp will move forward. After it stops moving forward, the crane will lift the material frame to the furnace discharge platform and place it on the platform.

[0083] 5) Press the "Back" button on the control box, the movable clamp moves back, and the material frame is placed on the furnace unloading platform. The crane lifts the hoisting device and moves it away to complete the furnace unloading operation.

[0084] Those skilled in the art will appreciate that the examples described here are intended to help readers understand the principles of the present invention, and should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific variations and combinations based on the technical inspirations disclosed in the present invention without departing from the present invention, and these variations and combinations are still within the protection scope of the present invention.

Claims

1. A lifting device, characterized in that: It includes a lifting frame, a movable clamping block, a forward and backward travel switch, a motor, a motor speed regulating box, a bar gear, a backward travel switch, a gear, a control electric box, a heat insulation baffle, and a lifting hole; the lifting frame is provided with a lifting hole on the upper part, and heat insulation baffles are provided on both sides of the lower part of the lifting frame; the movable clamping block, the forward and backward travel switch, the motor, the motor speed regulating box, the bar gear, the backward travel switch, and the gear are all arranged at the bottom of the lifting frame, and the control electric box is connected with the heat insulation baffle through a circuit.

2. The lifting device according to claim 1, characterized in that: The movement of the movable clamping block is completed by the motor driving the bar teeth.

3. The lifting device according to claim 2, characterized in that: Rolling bearing casters are designed between the movable clamping blocks.

4. The hoisting device according to claim 3, characterized in that: The movable clamp block and the rolling bearing caster are installed in the travel sleeve, and the travel track is controlled by the sleeve.

5. A system for rapid loading and unloading of a box-type trolley-type heat treatment furnace, characterized in that: It comprises the lifting device, heat treatment box, furnace door, heat treatment trolley and material frame as described in any one of claims 1 to 4; a furnace door is provided at one end of the heat treatment box, a heat treatment trolley is provided at the bottom of the heat treatment box, a lifting device is provided above the heat treatment trolley, and the material frame is provided inside the lifting device.

6. The system for rapid loading and unloading of a box-type trolley-type heat treatment furnace according to claim 5, characterized in that: The heat treatment box comprises a box body and a heating device.

7. The system for rapid loading and unloading of a box-type trolley-type heat treatment furnace according to claim 5, characterized in that: The length of the material frame is the same as the effective width of the heat treatment trolley, and the width is 1 / 2 or 1 / 3 of the effective length of the heat treatment trolley.

8. The system for rapid loading and unloading of a box-type trolley-type heat treatment furnace according to claim 7, characterized in that: The diameters of the material frame columns and crossbeams are both 50-70 mm.

9. The system for rapid loading and unloading of a box-type trolley-type heat treatment furnace according to claim 8, characterized in that: The material frame is integrally cast, and the manufacturing materials include heat-resistant steel, carbon steel or cast iron.

10. The system for rapid loading and unloading of a box-type trolley-type heat treatment furnace according to claim 9, characterized in that: The width of the lifting step of the material frame is 300-500 mm.

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