Furnace door lifting device of heating furnace

Abstract

The utility model provides a furnace door lifting device of a heating furnace, which comprises a lifting frame which is a door-shaped frame and is correspondingly arranged at a furnace opening of the heating furnace; the two sliding rails are arranged on the two sides of the lifting frame correspondingly and assembled in the opening direction of the furnace opening in a sliding mode, and the two sides of the furnace door are assembled in the sliding rails in a sliding mode through sliding blocks correspondingly; the pressing mechanisms corresponding to the furnace door are arranged on the two sides of the lifting frame, and the pressing mechanisms drive the sliding rails in the opening direction of the furnace opening so that the furnace door can be tightly attached to or loosened from the furnace opening; a lifting mechanism is arranged above the lifting frame so as to drive the furnace door in the longitudinal direction. The lifting mechanism is used for lifting the furnace door, and after the furnace door is in place, the pressing mechanism is used for carrying out extrusion driving in the opening direction of the furnace opening, so that the furnace door is pressed on the furnace opening, the sealing performance of the furnace opening is guaranteed, and the sealing effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of heating furnaces, and in particular relates to a furnace door lifting device of a heating furnace. Background Art

[0002] The existing box-type resistance furnace is composed of a furnace base, a furnace body, a furnace mouth, a furnace mouth lifting mechanism, a heating resistance wire and a heat-insulating material arranged in the furnace body, and a trolley that can move along a guide rail. The furnace mouth is generally composed of a cast iron furnace mouth frame, and its inner side is built with refractory bricks, so it is very heavy. The furnace mouth lifting mechanism is composed of two pairs of sprockets and chains, which are driven by an electric motor and a reduction mechanism placed on the top of the furnace body, and the furnace mouth is moved up and down with the help of a chain placed on the furnace mouth. Since this type of furnace mouth lifting mechanism moves up and down, it is necessary to leave a certain gap between the furnace mouth and the furnace body. Although some mechanisms have been adopted to make the gap smaller, it is still the place where heat in the furnace is dissipated, so the insulation of the furnace is poor.

[0003] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art. The utility model provides a furnace door lifting device for a heating furnace.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A furnace door lifting device for a heating furnace, comprising:

[0007] A lifting frame, which is a door-shaped frame and is correspondingly arranged at the furnace mouth of the heating furnace;

[0008] Slide rails, two of which are respectively arranged on both sides of the lifting frame and are slidably assembled along the direction of the furnace opening, and both sides of the furnace door are slidably assembled in the slide rails through sliders;

[0009] A clamping mechanism, wherein clamping mechanisms corresponding to the furnace door are provided on both sides of the lifting frame, and the clamping mechanism drives the slide rail along the furnace opening direction to make the furnace door close to or loosen the furnace opening;

[0010] A lifting mechanism is provided above the lifting frame to drive the furnace door in the longitudinal direction.

[0011] Preferably, the pressing mechanism comprises:

[0012] Guide plates, a plurality of said guide plates are fixed on the side of said lifting frame, said guide plates are provided with guide holes extending along the opening direction of the furnace mouth, and said side of said slide rail is provided with guide columns passing through said guide holes;

[0013] A shift plate, the middle part of which is connected to the outside of the lifting frame through an axle seat, one end of which is hinged to the guide column through a waist-shaped hole, and the other end of which is correspondingly hinged to a driving cylinder.

[0014] Preferably, the plurality of shift plates are fixedly connected via a rotating shaft.

[0015] Preferably, the lifting frame includes two columns and a crossbeam arranged above the columns, the columns include two I-beams or channel steels distributed at intervals, and the two ends of the guide plate are respectively fixed to the two columns.

[0016] Preferably, a position sensor corresponding to the furnace door is provided on one side of the lifting frame.

[0017] Preferably, the lifting mechanism is a driving motor, and the driving motor is connected to the furnace door via a driving steel cable.

[0018] Preferably, the main shaft of the driving motor is connected to two rotating wheels, and the driving steel cables are wound around the two rotating wheels;

[0019] The two driven wheels are staggeredly distributed on both sides of the top of the lifting frame in the direction of the furnace opening. The driven wheels are rotatably connected to the lifting frame through the mounting shaft. The driving steel cables on the two rotating wheels are connected to the furnace door after passing through the two driven wheels respectively.

[0020] Beneficial effect: The lifting mechanism is used to lift the furnace door. After the furnace door is in place, the pressing mechanism is used to squeeze and drive it in the direction of the furnace opening, so that the furnace door is pressed against the furnace opening, thereby ensuring the sealing of the furnace opening and improving the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. Among them:

[0022] Figure 1 A schematic structural diagram of a lifting frame in a specific embodiment provided by the utility model;

[0023] Figure 2 This is a schematic front view of a lifting frame in a specific embodiment provided by the utility model;

[0024] Figure 3 A schematic top view of a lifting frame in a specific embodiment provided by the utility model;

[0025] Figure 4 for Figure 1 Enlarged schematic diagram at point A in the middle.

[0026] In the figure: 1. lifting frame; 2. furnace door; 3. slide rail; 4. guide plate; 5. guide hole; 6. position sensor; 7. driving cylinder; 8. paddle plate; 9. shaft seat; 10. driving motor; 11. driving steel cable; 12. rotating wheel; 13. driven wheel; 14. positioning arm; 15. rotating shaft; 16. slider. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0028] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The terms "connected" and "connection" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0030] like Figure 1-4 As shown, a lifting device for a furnace door 2 of a heating furnace comprises a lifting frame 1, a slide rail 3, and a clamping mechanism. The lifting frame 1 is a door-shaped frame, which is correspondingly arranged at the furnace mouth of the heating furnace; two slide rails 3 are respectively arranged on both sides of the lifting frame 1, and the slide rails 3 extend longitudinally and are slidably assembled along the opening direction of the furnace mouth, so that they can be close to or away from the furnace mouth under driving, and the slide rails 3 are channel steels with grooves pointing to the side of the furnace door 2. The two sides of the furnace door 2 are slidably assembled in the slide rails 3 through sliders 16, so that the furnace door 2 can be slidably assembled in the longitudinal direction inside the lifting frame 1, and clamping mechanisms corresponding to the furnace door 2 are arranged on both sides of the lifting frame 1, and the clamping mechanism drives the slide rails 3 along the opening direction of the furnace mouth, so that the furnace door 2 is close to or loosens the furnace mouth. When the furnace door 2 is in place to a closed state, the furnace door 2 is sealed by being close to the furnace mouth. When the furnace door 2 needs to be opened, the furnace door 2 releases the furnace mouth so that the furnace door 2 can be smoothly lifted.

[0031] A lifting mechanism is provided above the lifting frame 1 to drive the furnace door 2 in the longitudinal direction so as to open and close the furnace door 2. Clamping mechanisms corresponding to the furnace door 2 are provided on both sides of the lifting frame 1. The clamping mechanisms drive the furnace door 2 in the direction of the furnace opening to make the furnace door 2 close to or loosen the furnace opening. When the furnace door 2 is in place to a closed state, the furnace door 2 is close to the furnace opening to achieve sealing. When the furnace door 2 needs to be opened, the furnace door 2 loosens the furnace opening so that the furnace door 2 can be lifted smoothly.

[0032] In an optional embodiment, two clamping mechanisms are provided, and the two clamping mechanisms are respectively located on both sides of the lifting frame 1 (outside the two columns), so as to synchronously drive both sides of the furnace door 2 to ensure the force balance after clamping at the furnace mouth.

[0033] The clamping mechanism includes a guide plate 4 and a paddle plate 8. The guide plate 4 is a metal plate and is correspondingly arranged between the two columns. At least two guide plates 4 are arranged on each column. Two columns are fixed at both ends of the guide plate 4 respectively. At least two guide plates 4 are arranged at intervals on each column. The guide plate 4 is provided with a guide hole 5 extending along the opening direction of the furnace mouth. The side of the slide rail 3 is provided with a guide column passing through the guide hole 5. The guide column is a metal column. The furnace door 2 is clamped or released by sliding along the guide hole 5.

[0034] The middle part of the paddle plate 8 is connected to the outer side of the lifting frame 1 through the shaft seat 9. One end of the paddle plate 8 is hinged to the guide column through the waist-shaped hole, so as to make way during the paddle movement. A driving cylinder 7 is correspondingly hinged at the other end of the paddle plate 8. The driving cylinder 7 extends along the opening direction of the furnace mouth. The paddle plate 8 drives the guide column to slide along the guide hole 5.

[0035] The plurality of paddles 8 are fixedly connected by a rotating shaft 15, and the two shaft seats 9 are correspondingly rotatably connected to the two ends of the rotating shaft 15. In the present application, two paddles 8 are provided, and only one of the two paddles 8 is connected to the driving cylinder 7.

[0036] In an optional embodiment, the lifting frame 1 includes two columns and a crossbeam arranged above the columns to form a door-type structure. The column includes two I-beams or channel steels distributed at intervals for the dial plate 8 to extend into, and the two ends of the guide plate 4 are respectively fixed to the two columns.

[0037] In this embodiment, one end of the shifting plate 8 is hinged to the guide column through a waist-shaped hole, and the end of the guide column after extending out of the guide hole 5 is provided with a hinge seat extending along the longitudinal direction. The hinge seat is hinged to the waist-shaped hole through a hinge shaft, so that it makes way during the shifting process, and the driving cylinder 7 extends along the direction of the furnace opening. The driving cylinder 7 drives the shifting plate 8 to drive the guide column to slide along the guide hole 5.

[0038] In an optional embodiment, a position sensor 6 corresponding to the furnace door 2 is provided on one side of the lifting frame 1, and there are four position sensors 6. The four position sensors 6 are distributed on the column along the longitudinal direction. The upper two position sensors 6 are an upper limit sensor group, wherein the upper position sensor 6 in the upper limit sensor group is used for positioning the furnace door 2, and the lifting mechanism stops driving after reaching the position sensor 6; the lower position sensor 6 in the upper limit sensor group is used for lifting and decelerating the furnace door 2, and the lifting mechanism slows down the driving speed after reaching the position sensor 6.

[0039] The two lower position sensors 6 form a lower limit sensor group, wherein the upper position sensor 6 in the lower limit sensor group is used to decelerate the descent of the furnace door 2 , and the lifting mechanism slows down the driving speed after reaching the position sensor 6 .

[0040] A position sensor 6 at the lower middle of the upper limit sensor group is used for positioning the furnace door 2. After reaching the position sensor 6, the lifting mechanism stops driving, and the furnace door 2 is thus in place. At this time, the clamping mechanism is started to clamp the furnace door 2.

[0041] In this embodiment, the limit sensor is a limit switch, and a positioning arm 14 corresponding to the limit sensor extends from the front of the furnace door 2. The positioning arm 14 extends toward the limit switch to trigger it, thereby accurately displaying the position of the furnace door 2.

[0042] In an optional embodiment, the lifting mechanism is a driving motor 10, and the driving motor 10 is connected to the furnace door 2 through a driving steel cable 11. The main shaft of the driving motor 10 is connected to two rotating wheels 12, and a winding groove is provided on the outer periphery of the rotating wheel 12 for winding the driving steel cable 11. Two driven wheels 13 are staggered on both sides of the top of the lifting frame 1 in the direction of the furnace opening, and the two driven wheels 13 are symmetrically distributed about the center line of the furnace door 2. The staggered distribution makes it possible for the driving steel cables 11 passing around the two of them to not interfere with each other. The driven wheels 13 are rotatably connected to the lifting frame 1 through the mounting shaft, and the driving steel cables 11 on the two rotating wheels 12 are connected to the furnace door 2 after passing around the two driven wheels 13 respectively.

[0043] The driven wheel 13 and the rotating wheel 12 are in the same horizontal plane, and a driven wheel 13 is correspondingly provided on the mounting shaft corresponding to the driven wheel 13 close to the rotating wheel 12, for guiding the driving steel cable 11. The cross beam of the lifting frame 1 is provided with a through hole corresponding to the driving steel cable 11.

[0044] In another embodiment, the rotating wheel 12 and the driven wheel 13 are both sprockets, and the number of teeth of the two is the same. The corresponding driving steel cable 11 should also be replaced by a chain. A counterweight block is provided on the side of the lifting frame 1. The weight of the counterweight block is the same as or close to the weight of the furnace door 2. In this way, after the two chains pass around the two rotating wheels 12 and the two driven wheels 13 respectively, they are connected to the furnace door 2. The furnace door 2 can be lifted and lowered under the drive of the driving motor 10, and the driving motor 10 is a self-locking stepping motor.

[0045] A protective shell corresponding to the counterweight block is provided on the side of the lifting frame 1, and the inner cavity of the protective shell has a lifting channel adapted to the cross section of the counterweight block, thereby limiting the lifting trajectory of the counterweight block.

[0046] In this case, a tension sensor is provided under the chain between the two driven wheels 13. The tension sensor is a touch switch. When the chain is in a tensioned state, there is a gap of 2-10 mm between the chain and the tension sensor. In a loose state, the middle part of the chain sags to touch the tension sensor. At this time, the connection stability of the chain needs to be inspected.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A furnace door lifting device for a heating furnace, characterized in that: include: A lifting frame, which is a door-shaped frame and is correspondingly arranged at the furnace mouth of the heating furnace; Slide rails, two of which are respectively arranged on both sides of the lifting frame and are slidably assembled along the furnace opening direction, and both sides of the furnace door are slidably assembled in the slide rails through sliders; A clamping mechanism, wherein clamping mechanisms corresponding to the furnace door are provided on both sides of the lifting frame, and the clamping mechanism drives the slide rail along the furnace opening direction to make the furnace door close to or loosen the furnace opening; A lifting mechanism is provided above the lifting frame to drive the furnace door in the longitudinal direction.

2. The furnace door lifting device of the heating furnace according to claim 1, characterized in that: The clamping mechanism comprises: Guide plates, a plurality of said guide plates are fixed on the side of said lifting frame, said guide plates are provided with guide holes extending along the opening direction of the furnace mouth, and said side of said slide rail is provided with guide columns passing through said guide holes; A shift plate, the middle part of which is connected to the outside of the lifting frame through an axle seat, one end of which is hinged to the guide column through a waist-shaped hole, and the other end of which is correspondingly hinged to a driving cylinder.

3. The furnace door lifting device of the heating furnace according to claim 2, characterized in that: The plurality of shift plates are fixedly connected via a rotating shaft.

4. The furnace door lifting device of the heating furnace according to claim 2, characterized in that: The lifting frame includes two columns and a crossbeam arranged above the columns. The columns include two I-beams or channel steels distributed at intervals. Both ends of the guide plate are respectively fixed to the two columns.

5. The furnace door lifting device of the heating furnace according to claim 2, characterized in that: A position sensor corresponding to the furnace door is provided on one side of the lifting frame.

6. The furnace door lifting device of a heating furnace according to claim 1, characterized in that: The lifting mechanism is a driving motor, and the driving motor is connected to the furnace door via a driving steel cable.

7. The furnace door lifting device of the heating furnace according to claim 6, characterized in that: The main shaft of the driving motor is connected to two rotating wheels, and the driving steel cables are wound around the two rotating wheels; The two driven wheels are staggeredly distributed on both sides of the top of the lifting frame in the direction of the furnace opening. The driven wheels are rotatably connected to the lifting frame through the mounting shaft. The driving steel cables on the two rotating wheels are connected to the furnace door after passing through the two driven wheels respectively.

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