Kiln frame capable of protecting heating element

Abstract

The utility model discloses a kiln frame capable of protecting a heating element, which comprises a kiln frame body, a first heating component is arranged between two opposite inner side walls of the kiln frame body, the first heating component comprises a plurality of heat transfer pipes, and an electric heating wire is arranged in each heat transfer pipe; sealing covers are arranged on the two sides of the kiln frame body respectively, the two ends of each heat transfer pipe penetrate through the kiln frame body and extend into the corresponding sealing covers, the heat transfer pipes communicate with the sealing covers, and each sealing cover is provided with a first air inlet pipe and a first air outlet pipe. Inert gas is filled into the sealing cover through the first gas outlet pipe, so that the inert gas enters the heat transfer pipe, the electric heating wire is prevented from being in contact with oxygen to be oxidized in a high-temperature environment, the electric heating wire is always protected by gas for a long time in the working process, and the service life of the electric heating wire is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of kilns, in particular to a kiln rack capable of protecting heating elements. Background Art

[0002] Kilns are used to fire ceramic products, etc. The kiln is equipped with a kiln frame as a framework. In some kilns, the heating elements are directly installed inside the kiln frame to achieve a more uniform and higher temperature heating effect.

[0003] The heating elements currently used in kiln racks mostly use electric heating wires, which are wound around the outside of the furnace tube. When heating is required, the electric heating wire wrapped around the outside of the furnace tube is heated first, and then the heat is radiated through the furnace tube to the heated workpiece inside the kiln rack. However, the heating wire in this structure is directly exposed to the air. When the inside of the kiln does not require an inert gas atmosphere for protection, the heating wire is easily oxidized and discolored in a high-temperature oxygen-containing environment, which affects its service life. Utility Model Content

[0004] In response to the above-mentioned defects, the purpose of the present utility model is to propose a kiln rack that can protect the heating element, so as to solve the problem that the existing heating wire is directly exposed to the air. When the kiln does not require an inert gas atmosphere to protect it, the heating wire is easily oxidized and discolored in a high-temperature oxygen-containing environment, which affects its service life.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A kiln rack capable of protecting a heating element comprises a kiln rack body, a first heating component being arranged between two opposite inner side walls of the kiln rack body, the first heating component comprising a plurality of heat transfer tubes, each of the heat transfer tubes being provided with a heating wire;

[0007] Sealing covers are respectively provided on both sides of the kiln frame body, and both ends of several heat transfer pipes respectively pass through the kiln frame body and extend into the corresponding sealing covers. Several heat transfer pipes are connected to the sealing covers, and each sealing cover is respectively provided with a first air inlet pipe and a first air outlet pipe.

[0008] Preferably, sealing plates are provided at both ends of each heat transfer tube, a hollow electrode tube is fixedly inserted in the middle of each sealing plate, and the heating wire is connected between the two hollow electrode tubes on each heat transfer tube.

[0009] Preferably, a partition is provided between the upper and lower inner walls of the sealing cover, and the partition divides the interior of the sealing cover into a first chamber and a second chamber. The first chamber is located between the second chamber and the kiln frame body. The ends of several heat transfer tubes pass through the partition and extend into the second chamber. The first air inlet pipe and the first air outlet pipe are both connected to the second chamber.

[0010] Preferably, a plurality of sealing flanges are installed on the partition, and a plurality of the heat transfer pipes respectively pass through the corresponding sealing flanges. A sealing ring is provided in each sealing flange, and the sealing ring is sleeved on the heat transfer pipe.

[0011] Preferably, two opposite inner side walls of the kiln frame body are respectively provided with a plurality of through holes, and the plurality of through holes are respectively communicated with the corresponding first chambers, and the sealing cover is further provided with a second air inlet pipe communicated with the first chamber;

[0012] A second air outlet pipe is fixedly provided on the partition, one end of the second air outlet pipe passes through the kiln frame body and extends to the inside, and the other end of the second air outlet pipe passes through the sealing cover and extends to the outside.

[0013] Preferably, both ends of several of the heat transfer tubes pass through the corresponding through holes, and the diameter of the through holes is larger than the diameter of the heat transfer tubes.

[0014] Preferably, the side wall of the sealing cover is provided with an opening communicating with the second chamber, a baffle is installed at the opening, and the baffle is provided with an avoidance gap for avoiding the first air outlet pipe and the second air outlet pipe.

[0015] Preferably, it also includes a second heating component, which is arranged between the two opposite inner walls of the kiln frame body, and is located directly below the first heating component. The second heating component has the same structure as the first heating component, and a transmission roller group is provided between the second heating component and the first heating component.

[0016] Preferably, the heating wire is a molybdenum wire.

[0017] The technical solution provided by the utility model may have the following beneficial effects:

[0018] Inert gas is filled into the sealing cover through the first gas outlet pipe, so that the inert gas enters the interior of the heat transfer tube, preventing the heating wire from coming into contact with oxygen and being oxidized in a high-temperature environment. The heating wire is always protected by gas during operation, thereby increasing the service life of the heating wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a cross-sectional view of the internal structure of the first heating component of the present invention;

[0021] Figure 3 This utility model Figure 2 Magnified view of area A in .

[0022] Among them: 1. kiln frame body; 11. through hole; 2. first heating component; 21. heat transfer tube; 22. sealing plate; 23. hollow electrode tube; 24. heating wire; 3. sealing cover; 31. first air inlet pipe; 32. first air outlet pipe; 33. partition; 331. first chamber; 332. second chamber; 333. sealing flange; 334. sealing ring; 335. second air outlet pipe; 336. second air inlet pipe; 34. baffle; 4. second heating component. DETAILED DESCRIPTION

[0023] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0024] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more such features, and are used to distinguish between the described features, without distinction of order or importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0026] Below is the attached figure Figures 1 to 3 The technical solution of the utility model is further illustrated through specific implementation methods.

[0027] like Figure 1-3 As shown, a kiln rack capable of protecting a heating element comprises a kiln rack body 1, a first heating component 2 being provided between two opposite inner side walls of the kiln rack body 1, the first heating component 2 comprising a plurality of heat transfer tubes 21, each of the heat transfer tubes 21 being provided with a heating wire 24;

[0028] Sealing covers 3 are respectively provided on both sides of the kiln frame body 1. Both ends of the plurality of heat transfer pipes 21 respectively pass through the kiln frame body 1 and extend into the corresponding sealing covers 3. The plurality of heat transfer pipes 21 are all connected to the sealing covers 3. Each sealing cover 3 is respectively provided with a first air inlet pipe 31 and a first air outlet pipe 32.

[0029] In this solution, an inert gas is filled into the sealing cover 3 through the first gas outlet pipe 32, so that the inert gas enters the interior of the heat transfer tube 21, thereby preventing the heating wire from coming into contact with oxygen and oxidizing in a high-temperature environment. The heating wire is always protected by the gas during operation, thereby increasing the service life of the heating wire.

[0030] Optionally, the sealing cover 3 is an integrally formed structure, which avoids seams and gaps that may exist in traditional assembly methods, making it difficult for the gas in the sealing cover 3 to flow to the outside, thereby achieving a better sealing effect.

[0031] like Figure 2-3 As shown, sealing plates 22 are provided at both ends of each heat transfer tube 21 , a hollow electrode tube 23 is fixedly inserted in the middle of each sealing plate 22 , and the heating wire 24 is connected between the two hollow electrode tubes 23 on each heat transfer tube 21 .

[0032] Specifically, the heating wire 24 can be energized through the hollow electrode tube 23, thereby generating heat, and the inert gas enters the interior of the heat transfer tube 21 through the hollow electrode tube 23, so that the inert gas fills the heat transfer tube 21, thereby ensuring that the heating wire is always protected by gas during operation.

[0033] like Figure 2-3 As shown, a partition 33 is provided between the upper and lower inner walls of the sealing cover 3, and the partition 33 divides the interior of the sealing cover 3 into a first chamber 331 and a second chamber 332. The first chamber 331 is located between the second chamber 332 and the kiln frame body 1, and the ends of several heat transfer tubes 21 pass through the partition 33 and extend into the second chamber 332. The first air inlet pipe 31 and the first air outlet pipe 32 are both connected to the second chamber 332.

[0034] Specifically, the inert gas is filled into the second chamber 332 through the first air inlet pipe 31. The first chamber 331 is separated from the second chamber 332 and the kiln frame body 1, so that the inert gas filled into the second chamber 332 does not directly contact the kiln frame body 1, thereby avoiding the inert gas temperature being too high, which causes the temperature of the hollow electrode tube 23 to be too high and affects the service life of the heating component.

[0035] like Figure 2-3As shown, a plurality of sealing flanges 333 are installed on the partition 33, and a plurality of the heat transfer pipes 21 are respectively passed through the corresponding sealing flanges 333. A sealing ring 334 is provided in each sealing flange 333, and the sealing ring 334 is sleeved on the heat transfer pipe 21.

[0036] Specifically, the sealing flange 333 and the sealing ring 334 can be provided to achieve good sealing at the connection between the partition plate 33 and the heat transfer tube 21 .

[0037] like Figure 1-3 As shown, two opposite inner side walls of the kiln frame body 1 are respectively provided with a plurality of through holes 11, and the plurality of through holes 11 are respectively communicated with the corresponding first chambers 331. The sealing cover 3 is further provided with a second air inlet pipe 336 communicated with the first chamber 331.

[0038] A second air outlet pipe 335 is fixedly provided on the partition 33 . One end of the second air outlet pipe 335 passes through the kiln frame body 1 and extends to the inside. The other end of the second air outlet pipe 335 passes through the sealing cover 3 and extends to the outside.

[0039] Specifically, inert gas is filled into the first chamber 331 through the second air inlet pipe 336 , and the inert gas in the first chamber 331 then enters the kiln frame body 1 through the through hole 11 , thereby controlling the atmosphere in the kiln frame body 1 . When the inert gas is no longer needed in the kiln frame body 1 , the inert gas can be discharged to the outside through the second air outlet pipe 335 .

[0040] like Figure 1-3 As shown, both ends of the plurality of heat transfer tubes 21 pass through the corresponding through holes 11 , and the diameter of the through holes 11 is larger than the diameter of the heat transfer tubes 21 .

[0041] Specifically, both ends of the heat transfer tube 21 are respectively passed through corresponding through holes 11, which can reduce the number of openings and facilitate device manufacturing. The diameter of the through hole 11 is larger than the diameter of the heat transfer tube 21, which can prevent the heat transfer tube 21 from blocking the through hole 11 and does not affect the inert gas in the first chamber 331 from entering the kiln frame body 1 through the through hole 11.

[0042] like Figure 1 As shown, the side wall of the sealing cover 3 is provided with an opening communicating with the second chamber 332 , and a baffle 34 is installed at the opening. The baffle 34 is provided with an avoidance gap for avoiding the first air outlet pipe 32 and the second air outlet pipe 335 .

[0043] Specifically, by installing the baffle 34, when the hollow electrode tube 23 in the second chamber 332 is damaged, there is no need to remove the entire sealing cover 3. Only the baffle 34 needs to be removed to repair and replace the hollow electrode tube 23 in the second chamber 332, thereby shortening the disassembly and assembly time during the maintenance process, and the avoidance notch on the baffle 34 can facilitate the disassembly and assembly of the baffle 34.

[0044] like Figure 1 As shown, it also includes a second heating component 4, which is arranged between the two opposite inner walls of the kiln frame body 1. The second heating component 4 is located directly below the first heating component 2. The second heating component 4 has the same structure as the first heating component 2, and a transmission roller group is provided between the second heating component 4 and the first heating component 2.

[0045] Specifically, the product to be processed can be transported by the transmission roller group, and the first heating component 2 and the second heating component 4 arranged up and down can make the product to be processed heated more evenly.

[0046] like Figure 1-3 As shown, the heating wire 24 is a molybdenum wire.

[0047] It is worth noting that molybdenum wire has a high melting point, high temperature resistance, good electrical conductivity, a small thermal expansion coefficient and good oxidation resistance, and the heating effect is stable and repeatable. Therefore, the use of molybdenum wire in the heating wire 24 can meet the high temperature and high performance requirements of the heating element working scene such as the kiln.

[0048] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will be able to devise other specific implementations of the present invention without inventive effort, and such implementations will fall within the scope of protection of the present invention.

Claims

1. A kiln stand capable of protecting a heating element, characterized in that: The invention comprises a kiln frame body (1), wherein a first heating component (2) is provided between two opposite inner side walls of the kiln frame body (1), wherein the first heating component (2) comprises a plurality of heat transfer tubes (21), and each heat transfer tube (21) is provided with a heating wire (24) inside. Sealing covers (3) are respectively provided on both sides of the kiln frame body (1); both ends of a plurality of heat transfer pipes (21) respectively pass through the kiln frame body (1) and extend into the corresponding sealing covers (3); the plurality of heat transfer pipes (21) are all in communication with the sealing covers (3); and each sealing cover (3) is respectively provided with a first air inlet pipe (31) and a first air outlet pipe (32).

2. A kiln stand capable of protecting a heating element according to claim 1, characterized in that: Each heat transfer tube (21) is provided with a sealing plate (22) at both ends, a hollow electrode tube (23) is fixedly inserted in the middle of each sealing plate (22), and the heating wire (24) is connected between the two hollow electrode tubes (23) on each heat transfer tube (21).

3. A kiln stand capable of protecting a heating element according to claim 1, characterized in that: A partition (33) is provided between the upper and lower inner walls of the sealing cover (3), and the partition (33) divides the interior of the sealing cover (3) into a first chamber (331) and a second chamber (332). The first chamber (331) is located between the second chamber (332) and the kiln frame body (1). The ends of the plurality of heat transfer pipes (21) all pass through the partition (33) and extend into the second chamber (332). The first air inlet pipe (31) and the first air outlet pipe (32) are both in communication with the second chamber (332).

4. A kiln stand capable of protecting a heating element according to claim 3, characterized in that: A plurality of sealing flanges (333) are installed on the partition (33), and a plurality of the heat transfer pipes (21) are respectively passed through the corresponding sealing flanges (333). A sealing ring (334) is provided in each sealing flange (333), and the sealing ring (334) is sleeved on the heat transfer pipe (21).

5. A kiln stand capable of protecting a heating element according to claim 3, characterized in that: Two opposite inner side walls of the kiln frame body (1) are respectively provided with a plurality of through holes (11), and the plurality of through holes (11) are respectively communicated with the corresponding first chambers (331). The sealing cover (3) is also provided with a second air inlet pipe (336) communicated with the first chamber (331); A second air outlet pipe (335) is fixedly provided on the partition (33), one end of the second air outlet pipe (335) passes through the kiln frame body (1) and extends to the inside, and the other end of the second air outlet pipe (335) passes through the sealing cover (3) and extends to the outside.

6. A kiln stand capable of protecting a heating element according to claim 5, characterized in that: Both ends of the plurality of heat transfer tubes (21) are respectively passed through the corresponding through holes (11), and the diameter of the through holes (11) is larger than the diameter of the heat transfer tubes (21).

7. The kiln stand capable of protecting the heating element according to claim 3, characterized in that: The side wall of the sealing cover (3) is provided with an opening communicating with the second chamber (332), a baffle (34) is installed at the opening, and the baffle (34) is provided with an escape notch for evading the first air outlet pipe (32) and the second air outlet pipe (335).

8. The kiln stand capable of protecting a heating element according to claim 1, characterized in that: The kiln frame body (1) further comprises a second heating component (4), the second heating component (4) being arranged between two opposite inner side walls of the kiln frame body (1), the second heating component (4) being located directly below the first heating component (2), the second heating component (4) having the same structure as the first heating component (2), and a transmission roller group being provided between the second heating component (4) and the first heating component (2).

9. The kiln stand capable of protecting a heating element according to claim 1, characterized in that: The heating wire (24) is a molybdenum wire.

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