A top-insertion protective pipe mounting structure

Abstract

This utility model discloses an upper-insertion protective tube installation structure, relating to the field of industrial heating equipment technology. The structure includes a furnace body, a heater protective tube, a protective tube fixing part, and a heat insulation cover. The heat insulation cover is fixedly installed at the furnace opening of the furnace body to support and fix the protective tube fixing part. A key improvement is that an operating port is provided on the side of the heat insulation cover, allowing the heater protective tube to be installed or removed horizontally through this port. This structure effectively avoids the difficulty of axial removal caused by slag buildup or high-temperature deformation on the protective tube surface, significantly improving the convenience and safety of maintenance operations, and reducing maintenance costs and time.

Description

Technical Field

[0001] This utility model relates to the field of industrial furnace heating equipment technology, and in particular to an installation structure for an upper insertable heater protection tube for a metal smelting holding furnace. Background Technology

[0002] In metal smelting holding furnaces, the heater protection tube is a crucial component that protects the heating elements from corrosion and physical damage caused by molten metal. Traditional horizontally inserted heater protection tubes must be completely submerged in molten metal. If the protection tube ruptures due to thermal stress impact, mechanical damage, or other reasons, molten metal can easily leak from the tube, posing a serious safety hazard. Furthermore, maintenance requires emptying the furnace of molten metal, resulting in prolonged production interruptions and significant economic losses.

[0003] To overcome the aforementioned shortcomings, existing technologies employ an upper-insertion protective tube installation scheme, where the protective tube is vertically inserted into the molten metal from above the furnace body. This method offers significant advantages: even if the protective tube ruptures, the molten metal will not leak, greatly improving operational safety; and when replacing the protective tube, it can be directly and vertically removed from the molten metal without emptying the furnace, minimizing production downtime.

[0004] However, this upper insertion structure still has significant problems in practical applications. Due to frequent fluctuations in the liquid level caused by feeding, unloading, and thermal expansion and contraction of the molten metal during production, the upper section (cold end) of the protective tube near the furnace opening is repeatedly exposed to air and molten metal, resulting in severe condensation and adhesion of metal oxide slag on its surface. As the operating time increases, the slag layer continues to thicken and even solidifies, causing the gap between the protective tube and the surrounding refractory materials or fixing devices to disappear, generating huge adhesion forces and mechanical jamming. Under such conditions, when performing maintenance, the traditional axial vertical pulling method is prone to operational difficulties due to excessive resistance, and may even require the use of large machinery or destructive dismantling. This is not only time-consuming and labor-intensive, increasing maintenance costs, but also poses risks such as high operational risks and potential damage to the internal structure of the furnace.

[0005] Therefore, in response to the technical bottlenecks of existing top-insertion protective pipes, such as slag buildup, jamming, and difficulty in removal, there is an urgent need for an innovative installation solution that is structurally sound, highly reliable, and cost-effective, enabling safe and convenient installation, disassembly, and maintenance even under harsh working conditions. Utility Model Content

[0006] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing an upper insertion type protective tube installation structure, which aims to solve the problem of the protective tube being unable to be easily removed due to severe slag buildup on its surface, thereby achieving quick and safe installation and removal of the protective tube and reducing maintenance time and costs.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] An upper-insertion protective tube installation structure includes a furnace body, a heater protective tube, a protective tube fixing part, and a heat insulation cover. The heat insulation cover is fixedly installed at the furnace opening of the furnace body to support and fix the protective tube fixing part; the key feature is that an operating port is opened on the side of the heat insulation cover, through which the heater protective tube can be installed or removed horizontally in the horizontal direction.

[0009] Furthermore, the protective tube fixing part is located above or inside the heat insulation cover.

[0010] Furthermore, the operating port is provided with an openable and closable heat insulation cover, which is connected to the heat insulation cover by bolts or buckles to reduce the temperature of the fixed part of the protective tube.

[0011] Furthermore, the size of the operating port is larger than the maximum outer diameter formed by the high-temperature deformation of the fixed part of the protective tube.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] Effectively avoids jamming and facilitates easy disassembly: By changing the traditional axial vertical pulling method to horizontal pulling, the section of the protective tube with the most severe slag buildup does not need to pass through the inner hole of the insulation cover, completely avoiding jamming caused by slag buildup and deformation, and allowing the protective tube to be easily removed even under harsh working conditions.

[0014] High maintenance efficiency and low cost: This structure eliminates the need to empty the furnace molten metal when replacing the protective tube, and also eliminates the need for large tools or destructive operations, significantly shortening maintenance time and reducing labor intensity and maintenance costs.

[0015] High safety: Operators do not need to perform a strenuous and dangerous vertical pulling operation directly above the protective tube, reducing safety risks. The design of the heat-insulating cover also ensures the heat preservation performance of the furnace lid during normal operation.

[0016] Simple structure and strong applicability: This solution only makes innovative improvements to the insulation cover structure. The structure is simple and the modification cost is low. It is particularly suitable for high-temperature, dusty and slag-prone metal smelting environments and has broad application value. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is an axial cross-sectional view or a three-dimensional structural diagram of the upper insert-type protective tube mounting structure of this utility model in the installed position.

[0019] Figure 2 This is an axial cross-sectional view or a three-dimensional structural diagram of the upper insert-type protective tube installation structure of this utility model in the state where the protective tube is pulled out laterally.

[0020] Figure 3 This is a schematic diagram illustrating the cooperation between the heat-insulating cover and the heat-resistant cover in a preferred embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1- Furnace body;

[0023] 2- Heater protection tube;

[0024] 3- Protective tube fixing part;

[0025] 4- Insulation cover;

[0026] 41- Operation port;

[0027] 5- Heat insulation cover; Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The specific embodiments described in this section are only used to explain the present utility model and are not intended to limit the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0029] This embodiment aims to provide a preferred implementation of the upper insertion protective tube installation structure, so that those skilled in the art can better understand and implement this utility model. The core of this utility model lies in the innovative improvement of the traditional insulation cover structure, which realizes the lateral installation and removal of the protective tube through the lateral operation port, thereby fundamentally solving the jamming problem caused by slag formation.

[0030] The present invention provides an upper insert-type protective tube installation structure, which mainly consists of a furnace body 1, a heater protective tube 2, a protective tube fixing part 3, a heat insulation cover 4, and a heat insulation cover 5.

[0031] The furnace body 1 is the main structure of a metal smelting and holding furnace, and its top is equipped with a furnace opening.

[0032] The heater protection tube 2 is made of high-temperature resistant and corrosion-resistant material and is vertically inserted into the molten metal in the furnace. Its interior is used to house the heating element.

[0033] The protective tube fixing part 3 is usually a flange assembly or clamp structure, which is used to clamp and fix the upper end of the heater protective tube 2.

[0034] The heat-insulating cover 4 is the core improvement of this utility model. Made of refractory insulation material, it is fixed to the furnace opening of the furnace body 1 by bolts or its own weight, and its main function is to reduce heat loss from the furnace opening. Unlike existing technologies, the heat-insulating cover 4 in this embodiment has an operating port 41 on its side. This operating port 41 is an opening that penetrates the side wall of the heat-insulating cover 4, and its shape is adapted to the cross-sectional shape of the protective tube fixing part 3, preferably square, but its internal dimensions (side length) must be greater than the maximum outer diameter of the protective tube fixing part 3 to ensure smooth passage.

[0035] The assembly and working process is as follows:

[0036] 1. Installation Process: First, assemble the protective tube fixing part 3 with the upper end of the heater protective tube 2. Then, place the insulation cover 4 on the furnace opening of the furnace body 1 and secure it. Finally, the operator moves the assembled heater protective tube 2 and protective tube fixing part 3 horizontally to the working position through the side operating port 41 of the insulation cover 4, so that the protective tube 2 is vertically suspended in the center of the furnace. Then, fix the protective tube fixing part 3 to the upper surface of the insulation cover 4 or the internal pre-set support structure using bolts or clips to complete the installation.

[0037] 2. Disassembly Process: When it is necessary to inspect or replace the heater protection tube 2, first disconnect the fixing connection between the protection tube fixing part 3 and the insulation cover 4. Then, apply horizontal force directly to pull the protection tube fixing part 3, along with the heater protection tube 2 below which is covered with slag, out horizontally as a whole through the operating port 41. Since the most severely slag-covered area is located on the protection tube body near the liquid surface, the diameter of this area is much smaller than the size of the operating port 41, and the extraction path is horizontal. The slag-covered area does not need to pass through the originally narrow top inner hole of the insulation cover 4, so the resistance is minimal, and disassembly can be easily completed.

[0038] In a preferred embodiment, a heat insulation cover 5 can be installed outside the operating port 41. The heat insulation cover 5 is connected to the side wall of the heat insulation cover 4 by bolts or clips. During normal production, the heat insulation cover 5 is closed to ensure the heat insulation effect of the furnace cover and reduce the internal temperature of the protective tube fixing part; during installation, disassembly and maintenance, the heat insulation cover 5 can be removed for operation, which is simple and quick.

[0039] It should be noted that the size design of the operating port 41 is crucial. It must fully consider the possible deformation of the protective tube fixing part 3 after long-term use, and ensure that the protective tube fixing part 3 can pass smoothly even under the worst working conditions.

[0040] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the protection scope of this utility model.

Claims

1. An upper insertion type protection tube mounting structure comprising a furnace body (1), a heater protection tube (2), a protection tube fixing portion (3), and a heat retaining cover (4) fixedly installed to a furnace mouth of the furnace body (1), characterized in that: The heat insulation cover (4) has an operation port (41) on its side, through which the heater protection tube (2) can be installed into or removed from the protection tube fixing part (3) laterally.

2. The upper-insertion-type protection-tube mounting structure according to claim 1, characterized by: The protective tube fixing part (3) is located above or inside the heat insulation cover (4) and is supported and fixed by the heat insulation cover (4).

3. The upper-insertion-type protection tube mounting structure according to claim 1 or 2, characterized by: The operating port (41) is equipped with a heat insulation cover (5) for the operating port.

4. The upper-insertion-type protection-tube mounting structure according to claim 3, characterized by: The heat insulation cover (5) is connected to the heat preservation cover (4) by bolts or clips.

5. The upper-insert protective tube installation structure according to claim 1, characterized by: The size of the operating port (41) is larger than the maximum outer diameter formed by high temperature deformation on the fixed part (3) of the protective tube.

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