Vacuum heat treatment furnace with corrugated anti-cracking heating belt

Abstract

The utility model provides a vacuum heat treatment furnace with corrugated reinforcing rib anti-cracking heating belt, belongs to vacuum heat treatment equipment technical field, including heat shield outer tube, the coaxial arrangement of multilayer intermediate heat shield is equipped with in heat shield outer tube, the coaxial arrangement of inner layer heat shield is equipped with in intermediate heat shield, the upper and lower arrangement of a plurality of annular heating belts is arranged in inner layer heat shield inboard, heat shield outer tube, multilayer intermediate heat shield, inner layer heat shield and annular heating belt are fixedly connected through insulating pull rod connecting assembly, and each annular heating belt is the annular belt structure formed by the butt joint of at least two heating pieces, and the wave vertical rib is equipped with on each heating piece, and the rib direction of wave vertical rib is perpendicular to the length direction of heating piece, the utility model sets up wave vertical rib on heating piece, makes heating piece have certain elastic contraction ability along length direction, effectively absorbs the stress generated by thermal expansion and cold shrink, solves the deformation, cracking problem of heating piece due to thermal expansion and cold shrink in prior art, prolongs the service life of heating piece.

Description

Technical Field

[0001] This utility model belongs to the technical field of vacuum heat treatment equipment, specifically relating to a vacuum heat treatment furnace with a corrugated anti-cracking heating belt. Background Technology

[0002] Vacuum heat treatment furnaces are widely used in the heat treatment of metallic materials. Their internal heating systems typically consist of multiple heating elements connected end-to-end to form a ring-shaped heating zone. In existing technology, adjacent heating elements are usually fixed together by bolts and round holes. Because the round holes and bolts are a fitted fit with little allowance for shrinkage, thermal expansion and contraction during heating and cooling can easily cause deformation and cracking of the edges of the round holes, or even seizing with the bolts. This severely affects the service life of the heating elements and increases equipment maintenance costs. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a vacuum heat treatment furnace with a corrugated heating strip to prevent cracking. This utility model solves the problem of deformation and cracking of heating elements caused by thermal expansion and contraction in the prior art, and extends the service life of the heating elements.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A vacuum heat treatment furnace with corrugated anti-cracking heating belts includes an outer cylinder of a heat insulation screen. Multiple intermediate heat insulation screens are coaxially arranged inside the outer cylinder of the heat insulation screen. An inner heat insulation screen is coaxially arranged inside the intermediate heat insulation screens. Multiple annular heating belts are arranged vertically on the inner side of the inner heat insulation screen. The outer cylinder of the heat insulation screen, the multiple intermediate heat insulation screens, the inner heat insulation screen, and the annular heating belts are fixedly connected by an insulating tie rod connecting assembly.

[0006] Each of the annular heating bands is formed by connecting at least two heating plates end to end to form an annular band structure. Each heating plate is provided with a wavy vertical rib, and the direction of the wavy vertical rib is perpendicular to the length direction of the heating plate.

[0007] Further defining the above scheme, each heating element has one or more wavy vertical ribs, and the wavy vertical ribs are evenly distributed at intervals along the length of the heating element.

[0008] As a further limitation of the above scheme, the heating element is provided with connecting holes at both ends, and a ring structure is formed by bolt connection.

[0009] As a further specification of the above scheme, the heating element is made of high-temperature molybdenum, molybdenum-lanthanum alloy, tungsten, or tungsten alloy material.

[0010] Further defining the above solution, the insulating tie rod connection assembly includes an insulating sleeve and a tie rod, the tie rod passing through each layer of heat insulation screen and heating strip and being fixed by a nut.

[0011] Further specifying the above solution, the intermediate heat insulation screen and the inner heat insulation screen are made of high-temperature molybdenum, molybdenum-lanthanum alloy, tungsten, or tungsten alloy materials.

[0012] Advantages of this utility model compared to the prior art:

[0013] 1. This solution uses corrugated vertical ribs on the heating element to give it a certain elastic contraction capacity along its length, effectively absorbing the stress generated by thermal expansion and contraction, and preventing deformation or cracking at the connection holes on the heating element.

[0014] 2. This solution extends the lifespan of the heating element and reduces equipment maintenance costs;

[0015] 3. This solution has a simple structure, is easy to manufacture and install, and is suitable for the renovation and upgrading of existing vacuum heat treatment furnaces. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front view of the heating element in this utility model; Figure 3 This is a top view of the heating element in this utility model. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0018] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0019] Please see Figure 1-3 The embodiments of this utility model are described in detail below.

[0020] Example: See Figure 1As shown, this embodiment provides a vacuum heat treatment furnace with corrugated anti-cracking heating belts, including an outer cylinder of a heat insulation screen 1. The outer cylinder of the heat insulation screen 1 has multiple layers of intermediate heat insulation screens 2 coaxially arranged inside. The inner side of the intermediate heat insulation screens 2 has an inner layer of heat insulation screen 3 coaxially arranged inside. The inner side of the inner layer of heat insulation screen 3 has multiple annular heating belts 4 arranged vertically on the inner side. The outer cylinder of the heat insulation screen 1, the multiple layers of intermediate heat insulation screens 2, the inner layer of heat insulation screen 3 and the annular heating belts 4 are fixedly connected by an insulating tie rod connecting assembly 5.

[0021] See Figure 1 and Figure 3 As shown, each of the annular heating bands 4 is an annular band structure formed by connecting at least two heating elements 4-1 end to end. Each heating element 4-1 has circular connecting holes at both ends, and is connected by bolts to form an annular structure.

[0022] See Figure 2 and Figure 3 As shown, each heating element 4-1 is provided with a wavy vertical rib 4-1-1, the direction of which is perpendicular to the length of the heating element. During heating, the wavy vertical rib can undergo elastic deformation to absorb thermal stress and prevent cracking caused by stress concentration at the connection holes at the ends of the heating elements.

[0023] Preferably, each heating element 4-1 has one or more wavy vertical ribs 4-1-1, and the multiple wavy vertical ribs 4-1-1 are evenly distributed at intervals along the length of the heating element 4-1.

[0024] Preferably, the heating element 4-1 is made of high-temperature molybdenum, molybdenum-lanthanum alloy, tungsten, or tungsten alloy material.

[0025] See Figure 1 As shown, the insulating tie rod connection assembly 5 includes an insulating sleeve and a tie rod, which passes through each layer of heat insulation screen and heating belt and is fixed by a nut.

[0026] Preferably, the intermediate heat insulation screen 2 and the inner heat insulation screen 3 are made of high-temperature molybdenum, molybdenum-lanthanum alloy, tungsten, or tungsten alloy materials.

[0027] Working principle: After being powered on, the heating element 4-1 heats up. The corrugated vertical ribs 4-1-1 elastically expand and contract with temperature changes, effectively absorbing the stress generated by thermal expansion and contraction, releasing thermal stress, preventing deformation or cracking of the connecting holes, protecting the structural integrity of the heating element, and extending its service life. This device has a simple structure, is easy to manufacture and install, and is suitable for the retrofitting and upgrading of existing vacuum heat treatment furnaces.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A vacuum heat treatment furnace with a corrugated heating belt to prevent cracking, characterized in that: The device includes an outer cylinder of a heat insulation screen (1), inside which multiple layers of intermediate heat insulation screens (2) are coaxially arranged, and an inner heat insulation screen (3) is coaxially arranged on the inner side of the intermediate heat insulation screens (2). Multiple annular heating bands (4) are arranged vertically on the inner side of the inner heat insulation screen (3). The outer cylinder of the heat insulation screen (1), the multiple layers of intermediate heat insulation screens (2), the inner heat insulation screen (3) and the annular heating bands (4) are fixedly connected by an insulating tie rod connecting assembly (5). Each of the annular heating bands (4) is an annular band structure formed by connecting at least two heating plates (4-1) end to end. Each heating plate (4-1) is provided with a wavy vertical rib (4-1-1), and the direction of the rib (4-1-1) is perpendicular to the length direction of the heating plate.

2. The vacuum heat treatment furnace with corrugated anti-cracking heating belt according to claim 1, characterized in that: Each heating element (4-1) has one or more wavy vertical ribs (4-1-1), and the wavy vertical ribs (4-1-1) are evenly distributed at intervals along the length of the heating element (4-1).

3. The vacuum heat treatment furnace with corrugated anti-cracking heating belt according to claim 1, characterized in that: The heating element (4-1) has connection holes at both ends, which are connected by bolts to form a ring structure.

4. The vacuum heat treatment furnace with corrugated anti-cracking heating belt according to claim 1, characterized in that: The heating element (4-1) is made of high-temperature molybdenum, molybdenum-lanthanum alloy, tungsten, or tungsten alloy.

5. The vacuum heat treatment furnace with corrugated anti-cracking heating belt according to claim 1, characterized in that: The insulating tie rod connection assembly (5) includes an insulating sleeve and a tie rod, which passes through each layer of heat insulation screen and heating strip and is fixed by a nut.

6. The vacuum heat treatment furnace with corrugated anti-cracking heating belt according to claim 1, characterized in that: The intermediate heat shield (2) and the inner heat shield (3) are made of high-temperature molybdenum, molybdenum-lanthanum alloy, tungsten or tungsten alloy materials.

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