Furnace door compounding mechanism capable of preventing shaking

Abstract

The utility model discloses an anti-shaking furnace door composite mechanism which comprises a furnace door frame, the furnace door frame is connected with a furnace body in a sliding mode, a connecting part is arranged on the furnace door frame, the connecting part is connected with an electric lifting mechanism, and the electric lifting mechanism is arranged at the top of the furnace body and used for controlling the furnace door frame to ascend and descend. The furnace door frame is provided with a furnace door body, the furnace door body is flexibly connected with the upper end of the furnace door frame through a traction component, and the furnace door body is used for opening or closing a furnace body; an elastic limiting mechanism is arranged at the lower end of the furnace door frame and used for limiting shaking of the furnace door body. According to the utility model, the furnace door body is pulled by utilizing the elastic force provided by the compression spring to prevent the furnace door body from shaking, so that the furnace door body is prevented from being stuck in the lifting or descending movement process to cause the fault of a motor; the lifting stability of the furnace door body is greatly improved through the elastic limiting mechanism, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of quenching furnaces, in particular to a composite mechanism for a furnace door which can prevent shaking. Background Art

[0002] The roller-bottom heat treatment furnace of the heat treatment quenching line adopts a radiation tube non-oxidation heating furnace type, which is used for normalizing and quenching heat treatment of steel plates, hereinafter referred to as a quenching furnace. The quenching furnace is mainly composed of a loading and unloading furnace door, a sealing section of the loading and unloading port, a furnace body steel structure and masonry, a furnace roller, a combustion system, and a protective gas system. The loading and unloading furnace door includes a furnace door body, a furnace door frame, a furnace door lifting device, a pressing device, etc., which plays the role of sealing the furnace mouth, preventing heat loss in the furnace, and preventing cold air outside the furnace body from entering the furnace. The furnace door body and the furnace door frame are water-cooled to effectively prevent the furnace door from deforming. The furnace door lifting device is equipped with an electric lifting mechanism, including chains, winches, etc. The furnace door pressing device uses a cylinder as a power to press the furnace door to ensure good sealing. In order to ensure the reliability of the furnace door sealing, the furnace door frame structure we use has an adjustable sealing strip wrapped with zirconium fiber cloth on the inside. In recent years, the heat treatment output of our factory has gradually increased, the production pace has accelerated, and there is almost no time for the quenching furnace to be shut down for maintenance. However, in April, it was found that the sealing strip of the furnace door frame of the quenching furnace feed door was ineffective and damaged, and the chain and ring of the furnace door lifting device were worn. When the furnace door is opened, under the action of the furnace pressure, the furnace door will have a large offset in the vertical direction, which will cause shaking during the lifting and lowering of the furnace door. The large shaking causes the furnace door to be stuck by the lower edge of the furnace door frame when it is lifted at a low position, and it cannot be lifted, and even causes motor failure. The usual practice is to stop the furnace and replace the sealing strip in the furnace door frame, but there is not much maintenance time for replacement. Therefore, those skilled in the art provide a furnace door composite mechanism to prevent shaking to solve the problems raised in the above background technology. Summary of the invention

[0003] The utility model aims to provide a composite mechanism for a furnace door that can prevent shaking, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a composite mechanism for preventing a furnace door from shaking, comprising: a furnace door frame, the furnace door frame is slidably connected to a furnace body, and a connecting portion is provided on the furnace door frame, the connecting portion is connected to an electric lifting mechanism, the electric lifting mechanism is provided on the top of the furnace body, and the electric lifting mechanism is used to control the furnace door frame to perform lifting and lowering movements; the furnace door frame is provided with a furnace door body, the furnace door body is flexibly connected to the upper end of the furnace door frame through a traction component, and the furnace door body is used to open or close the furnace body; an elastic limiting mechanism is provided at the lower end of the furnace door frame, and the elastic limiting mechanism comprises:

[0005] A spring baffle, the spring baffle being fixedly connected to the lower end of the furnace door frame;

[0006] A limiting screw rod, one end of which passes through a spring baffle and is fixedly connected to the furnace door body, and the other end is sequentially sleeved with a compression spring and a spring pressure plate, a clamping nut is provided on the outer side of the spring pressure plate, and the clamping nut is threadedly connected to the limiting screw rod.

[0007] Furthermore, a connecting block is provided between the limiting screw rod and the furnace door body, and the limiting screw rod is fixedly connected to the furnace door body through the connecting block.

[0008] Furthermore, there are two elastic limiting mechanisms, which are horizontally arranged at the furnace door frame and the lower end of the furnace door body.

[0009] Furthermore, a clamping mechanism is provided at the bottom of the furnace door frame, and the clamping mechanism includes: a clamping cylinder, a piston rod of the clamping cylinder is perpendicular to the furnace door body, a cylinder barrel of the clamping cylinder is fixedly connected to the furnace door frame, and a clamping block is provided at the end of the piston rod of the clamping cylinder.

[0010] Furthermore, the pressing block is made of high temperature resistant material.

[0011] Furthermore, the traction component is a metal chain.

[0012] Furthermore, the electric lifting mechanism is a winch, and the winch is connected to the furnace door frame through a connecting part.

[0013] Furthermore, the connecting portion is a connecting ear, and there are two connecting ears, which are symmetrically arranged on the upper end of the furnace door frame.

[0014] Furthermore, sliders are provided on both sides of the furnace door frame, and corresponding slide rails are provided on the furnace body. The sliders are slidably connected to the slide rails and are used to guide the furnace door frame during lifting and lowering.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The device utilizes the elastic force provided by the compression spring to pull the furnace door body to prevent it from shaking, so that the furnace door body will not get stuck during the lifting or lowering movement, thereby causing motor failure; the elastic limit mechanism greatly improves the stability of the furnace door body's lifting and lowering, and extends its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 It is a main schematic diagram of the utility model;

[0019] Figure 3 for Figure 2 AA cross-sectional view of ;

[0020] Figure 4 It is a schematic diagram of the connection of the elastic limiting mechanism on the furnace door frame;

[0021] In the figure: 1. furnace door frame; 2. connecting part; 3. furnace door body; 4. elastic limiting mechanism; 401. limiting screw rod; 402. spring baffle; 403. compression spring; 404. spring pressure plate; 405. clamping nut; 406. connecting block; 5. traction component; 6. clamping cylinder; 601. clamping block. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-Figure 4 A composite mechanism for preventing a furnace door from shaking comprises: a furnace door frame 1, wherein the furnace door frame 1 is slidably connected to a furnace body, and a connecting portion 2 is provided on the furnace door frame 1, wherein the connecting portion 2 is connected to an electric lifting mechanism, wherein the electric lifting mechanism is provided on the top of the furnace body (not shown in the figure), and wherein the electric lifting mechanism is used to control the furnace door frame 1 to perform lifting and lowering movements; the furnace door frame 1 is provided with a furnace door body 3, wherein the furnace door body 3 is flexibly connected to the upper end of the furnace door frame 1 through a traction component 5, and wherein the furnace door body 3 is used to open or close the furnace body; an elastic limiting mechanism 4 is provided at the lower end of the furnace door frame 1, and wherein the elastic limiting mechanism 4 comprises:

[0024] A spring baffle 402, wherein the spring baffle 402 is fixedly connected to the lower end of the furnace door frame 1;

[0025] A limiting screw rod 401 has one end passing through a spring baffle plate 402 and fixedly connected to the furnace door body 3, and the other end is sequentially sleeved with a compression spring 403 and a spring pressure plate 404, a clamping nut 405 is provided on the outer side of the spring pressure plate 404, and the clamping nut 405 is threadedly connected to the limiting screw rod 401.

[0026] In this embodiment, a connecting block 406 is provided between the limiting screw rod 401 and the furnace door body 3 , and the limiting screw rod 401 is fixedly connected to the furnace door body 3 via the connecting block 406 .

[0027] In this embodiment, there are two elastic limiting mechanisms 4 which are horizontally arranged at the lower ends of the furnace door frame 1 and the furnace door body 3 .

[0028] In this embodiment, a clamping mechanism is provided at the bottom of the furnace door frame 1, and the clamping mechanism includes: a clamping cylinder 6, a piston rod of the clamping cylinder 6 is perpendicular to the furnace door body 3, a cylinder barrel of the clamping cylinder 6 is fixedly connected to the furnace door frame 1, and a clamping block 601 is provided at the end of the piston rod of the clamping cylinder 6.

[0029] In this embodiment, the pressing block 601 is made of high temperature resistant material.

[0030] In this embodiment, the traction component 5 is a metal chain.

[0031] In this embodiment, the electric lifting mechanism is a winch, and the winch is connected to the furnace door frame 1 through a connecting part 2.

[0032] In this embodiment, the connecting portion 2 is a connecting ear, and there are two connecting ears symmetrically arranged on the upper end of the furnace door frame 1.

[0033] In this embodiment, sliders are provided on both sides of the furnace door frame 1, and corresponding slide rails are provided on the furnace body. The sliders are slidably connected with the slide rails to guide the furnace door frame 1 during its lifting and lowering. Compared with the prior art, the utility model has the following beneficial effects:

[0034] This device utilizes the elastic force provided by the compression spring 403 to pull the furnace door body 3 to prevent it from shaking, so that the furnace door body 3 will not get stuck during the lifting or lowering movement, thereby preventing the motor from malfunctioning. The elastic limiting mechanism 4 is utilized to greatly improve the stability of the lifting and lowering of the furnace door body 3 and extend its service life.

Claims

1. A composite mechanism for preventing a furnace door from shaking, comprising: A furnace door frame, the furnace door frame is slidably connected to the furnace body, and a connecting portion is provided on the furnace door frame, the connecting portion is connected to an electric lifting mechanism, the electric lifting mechanism is provided on the top of the furnace body, and the electric lifting mechanism is used to control the furnace door frame to perform lifting and lowering movements; the furnace door frame is provided with a furnace door body, the furnace door body is flexibly connected to the upper end of the furnace door frame through a traction component, and the furnace door body is used to open or close the furnace body; it is characterized in that: an elastic limiting mechanism is provided at the lower end of the furnace door frame, and the elastic limiting mechanism includes: A spring baffle, the spring baffle being fixedly connected to the lower end of the furnace door frame; A limiting screw rod, one end of which passes through a spring baffle and is fixedly connected to the furnace door body, and the other end is sequentially sleeved with a compression spring and a spring pressure plate, a clamping nut is provided on the outer side of the spring pressure plate, and the clamping nut is threadedly connected to the limiting screw rod.

2. The composite structure for preventing furnace door from shaking according to claim 1, characterized in that: A connecting block is provided between the limiting screw rod and the furnace door body, and the limiting screw rod is fixedly connected to the furnace door body through the connecting block.

3. The composite structure for preventing furnace door from shaking according to claim 1, characterized in that: There are two elastic limiting mechanisms, which are horizontally arranged on the furnace door frame and the lower end of the furnace door body.

4. The composite structure for preventing furnace door from shaking according to claim 1, characterized in that: A clamping mechanism is provided at the bottom of the furnace door frame, and the clamping mechanism includes: a clamping cylinder, a piston rod of the clamping cylinder is perpendicular to the furnace door body, a cylinder barrel of the clamping cylinder is fixed to the furnace door frame, and a clamping block is provided at the end of the piston rod of the clamping cylinder.

5. The composite structure for preventing furnace door from shaking according to claim 4, characterized in that: The pressing block is made of high temperature resistant material.

6. The composite structure for preventing furnace door from shaking according to claim 1, characterized in that: The traction component is a metal chain.

7. The composite structure for preventing furnace door from shaking according to claim 1, characterized in that: The connecting part is a connecting ear, and there are two connecting ears, which are symmetrically arranged on the upper end of the furnace door frame.

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