Inlet air cooling device of ultra-deep well type nitriding furnace

Abstract

The utility model relates to the technical field of nitriding furnaces, in particular to an inlet air cooling device of an ultra-deep well type nitriding furnace, which comprises a fan connected to the nitriding furnace and used for cooling inlet air, a butterfly valve for adjusting the inlet air rate is additionally arranged on the fan, and the pipeline joints of the butterfly valve, the nitriding furnace and the fan are all arranged to be of flange structures. A plurality of arc-shaped rings which can stretch out and draw back in the arc direction are installed on the connecting face through bolts, the arc-shaped rings form a closed ring body structure after being stretched, and the outer portion of the ring body structure is sleeved with a sealing ring used for sealing and isolation. The number of parts required for assembly is reduced, and meanwhile, a stable supporting effect on the sealing ring is achieved, so that all joint surfaces of the nitriding furnace are tighter, and air cooling is smooth and free of leakage; by additionally arranging the rotatable L-shaped limiting plate, additional locking and supporting effects are provided for the joint face, and the sealing performance of the flange joint is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of nitriding furnaces, in particular to an air inlet cooling device for an ultra-deep well type nitriding furnace. Background Art

[0002] The ultra-deep well nitriding furnace is a kind of equipment used for surface treatment process, usually used for nitriding treatment of metal parts. The ultra-deep well nitriding furnace adopts a deep well structure design, that is, the furnace depth is relatively large. This design can accommodate more workpieces and provide a larger heating space, which is suitable for situations where large-scale processing is required. The ultra-deep well nitriding furnace is equipped with an advanced temperature control system and nitrogen control system, which can achieve precise control and adjustment of parameters such as temperature and nitrogen, ensuring the accuracy and stability of the nitriding process. The ultra-deep well nitriding furnace is a kind of equipment suitable for large-scale production and processes with high requirements for nitriding treatment. It has the advantages of uniform heating, precise control, energy saving and environmental protection, and high automation. The use of this equipment can improve production efficiency, ensure product quality, and meet the needs of industrial production for surface treatment processes.

[0003] At present, the air inlet cooling effect of ultra-deep pit nitriding furnace is not good during nitriding treatment. This problem may cause the temperature in the furnace to be too high, affecting the quality and stability of the surface treatment of the workpiece. Since the existing air inlet cooling system cannot effectively reduce the furnace temperature, it causes a decrease in production efficiency and a waste of resources; and the internal connections of the pipeline are not tight, which is prone to air leakage, resulting in loud noise and uneven cooling. Utility Model Content

[0004] In view of the above problems, the present application provides an air inlet cooling device for an ultra-deep well nitriding furnace, the structure of which is as follows:

[0005] An air inlet cooling device for an ultra-deep well nitriding furnace comprises:

[0006] A fan connected to the nitriding furnace to provide air cooling, with a butterfly valve installed on the fan to adjust the air intake volume;

[0007] The pipe connections of the butterfly valve, nitriding furnace and fan are all set as flange structures. Several arc-shaped rings that can be extended and retracted in an arc direction are installed on the connection surface by bolts, and each arc-shaped ring forms a closed ring structure after stretching. A sealing ring for sealing and isolation is provided on the outside of the ring structure, and the sealing ring is clamped at the abutment surface of the flange structure.

[0008] Preferably, the flange structure is divided into two opposing flange plates, and the two flange plates are connected by bolts.

[0009] Based on the above technical solution, an arc-shaped ring that can be extended and retracted in an arc direction integrates the functions of support and limit, which can simplify the assembly process and reduce the number of required parts; when the arc-shaped ring is stretched and expanded along its arc direction, it can fit tightly and support the entire sealing ring, ensuring that its position at the flange connection is fixed, preventing the sealing ring from shifting and twisting under pressure deformation or dynamic conditions, thereby significantly improving the sealing performance of the flange connection; its structure is compact and simplifies the installation and disassembly process.

[0010] Preferably, the positioning ring is composed of an arc-shaped moving ring and an arc-shaped fixed ring which are slidably connected to each other, and both surfaces are provided with limiting through holes with the same size as the flange aperture, and the positioning ring is installed with bolts through the limiting through holes.

[0011] Preferably, an arcuate cavity for mounting the arcuate moving ring is provided in the arcuate fixed ring, and claws are provided at the end thereof to prevent the arcuate moving ring from falling out.

[0012] Based on the above technical solution, the claw is arranged at the matching position of the arc-shaped moving ring and the arc-shaped fixed ring. A rubber protrusion is provided at one end of the arc-shaped moving ring facing the matching position. The rubber protrusion is interference fit with the adjacent arc-shaped ring to form an annular closed self-locking structure, which makes the whole structure more stable.

[0013] Preferably, a fixing block is fixedly provided on any flange, and a limiting groove is provided on the adjacent flange. The fixing blocks and the limiting grooves correspond one to one, and a plurality of the fixing blocks and the limiting grooves are equidistantly arranged along the circumference of the flange.

[0014] Preferably, an L-shaped limit plate is rotatably connected to the fixed block via a pin shaft, the other end of the L-shaped limit plate is interference fit in the limit groove, and the abutment surface between the L-shaped limit plate and the limit groove is also installed via bolts.

[0015] Based on the above technical solution, a rotatable L-shaped limit plate is added to the flange connection structure, which provides additional locking and supporting functions to enhance the sealing performance of the flange connection; by rotating the L-shaped limit plate, it forms a stable locking fit with the flange structure and is locked with the help of bolts. Once the L-shaped limit plate is in the correct position, it can apply additional restraining force to the flange connection from the side, further squeeze the sealing ring, increase the compression of the sealing ring, thereby greatly improving the sealing effect and effectively preventing leakage of the medium.

[0016] Preferably, the abutting surface between the L-shaped limiting plate and the limiting groove is set as a waist-shaped hole, and the side of the L-shaped limiting plate is integrated with an elastic telescopic rod, and the elastic telescopic rod is coaxially arranged with the pin shaft.

[0017] Based on the above technical solution, a quick-release functional component is added to the rotating part on the basis of the original L-shaped limit plate. When it is necessary to quickly release the locking effect of the L-shaped limit plate on the flange structure, the matching relationship between the pin shaft and the rotating aperture can be changed by simply adjusting the telescopic length of the elastic telescopic rod. As the telescopic rod shortens, the pin shaft can be smoothly disengaged from the rotating aperture, so that the L-shaped limit plate loses the locking effect on the flange connection, and rapid unlocking and disassembly can be achieved; it is not only convenient for quickly adjusting the sealing state of the flange connection when necessary, such as repairing and replacing seals, but also greatly improves work efficiency, reduces downtime caused by cumbersome disassembly, and brings higher convenience and flexibility to equipment maintenance. Compared with the prior art, the utility model has the following beneficial technical effects:

[0018] 1. The utility model provides an arc ring that can be extended in an arc direction, which not only simplifies the number of parts required for assembly, but also provides a stable supporting effect on the sealing ring, so that the joint surfaces of the nitriding furnace are tighter, thereby making the air cooling smooth without leakage;

[0019] 2. The utility model provides an additional locking and supporting function for the joint surface by adding a rotatable L-shaped limit plate, thereby enhancing the sealing performance of the flange connection;

[0020] 3. The utility model has a simple structure, and realizes synchronous locking of the flange, the L-shaped limiting plate and the arc ring through bolts, further optimizing the number of parts required for assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The structure of the utility model is shown in FIG. Figure 1 ;

[0022] Figure 2 The structure of the utility model is shown in FIG. Figure 2 ;

[0023] Figure 3 It is a structural schematic diagram of the flange structure in the utility model;

[0024] Figure 4 For this utility model Figure 3 Exploded schematic diagram of the structure;

[0025] Figure 5 It is a structural schematic diagram of the sealing ring and the positioning ring in the utility model;

[0026] Figure 6 For this utility model Figure 3 A cross-sectional view of the middle structure;

[0027] Figure 7 For this utility model Figure 3 Schematic diagram of the structure of the middle part;

[0028] Figure 8 It is a structural schematic diagram of the L-shaped limiting plate in the utility model.

[0029] 1: fan, 2: butterfly valve, 3: nitriding furnace, 4: flange, 5: sealing ring, 6: positioning ring, 7: bolt, 8: L-shaped limiting plate, 401: fixing block, 402: limiting groove, 601: arc-shaped moving ring, 602: arc-shaped fixed ring, 603: limiting through hole, 801: waist-shaped hole, 802: elastic telescopic rod, 803: pin shaft. DETAILED DESCRIPTION

[0030] The following describes the specific implementation of the utility model in conjunction with the accompanying drawings and embodiments:

[0031] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportional relationship or adjustment of size should fall within the scope of the technical content disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0032] At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of the implementation of the present utility model without substantially changing the technical content.

[0033] Example 1

[0034] Reference Figures 1 to 6 The present embodiment provides an air inlet cooling device for an ultra-deep well nitriding furnace, comprising a fan 1 connected to the nitriding furnace 3 for providing air inlet cooling, a butterfly valve 2 for adjusting the air inlet amount is installed on the fan 1, the butterfly valve 2, the nitriding furnace 3 and the pipeline connection of the fan 1 are all arranged as flange structures, a plurality of arc rings that can be extended and retracted in an arc direction are installed at the connection surface by bolts 7, and each arc ring forms a closed ring structure after being stretched, and a sealing ring 5 for sealing and isolation is provided on the outside of the ring structure.

[0035] The flange structure is divided into two opposing flange plates 4, and the two flange plates 4 are connected by bolts 7. The positioning ring 6 is composed of an arc-shaped moving ring 601 and an arc-shaped fixed ring 602 that are slidably connected to each other. Both surfaces are provided with limiting through holes 603 with the same diameter as the flange plate 4. The positioning ring 6 is installed with the bolts 7 through the limiting through holes 603. In this structure, an arc-shaped fixed ring 602 is provided with an arc-shaped cavity for installing the arc-shaped moving ring 601, and its end is provided with a claw to prevent the arc-shaped moving ring 601 from falling out.

[0036] Example 2

[0037] Reference Figures 3 to 7 Based on Example 1, this embodiment further provides an air inlet cooling device for an ultra-deep well nitriding furnace, wherein a fixing block 401 is fixedly provided on any flange 4, and a limiting groove 402 is provided on the adjacent flange 4, the fixing block 401 corresponds to the limiting groove 402 one by one, and four are equidistantly arranged along the circumference of the flange 4, and in this structure, an L-shaped limiting plate 8 is rotatably connected to the fixing block 401 through a pin shaft 803, and the other end of the L-shaped limiting plate 8 is interference-connected to the limiting groove 402, and the abutting surface of the L-shaped limiting plate 8 and the limiting groove 402 is also installed by bolts 7.

[0038] Example 3

[0039] Reference Figure 8 Based on Example 2, this embodiment also provides an air inlet cooling device for an ultra-deep well nitriding furnace, wherein the abutting surface between the L-shaped limiting plate 8 and the limiting groove 402 is set as a waist-shaped hole 801, and the side of the L-shaped limiting plate 8 is integrated with an elastic telescopic rod 802, and the elastic telescopic rod 802 is coaxially arranged with the pin shaft 803. In this structure, the surface where the waist-shaped hole 801 is located can be set as an inclined surface, and the L-shaped limiting plate 8 is radially pulled out under the premise that the pin shaft 803 is detached, and its inclined surface structure can cause the disintegration of the sealing structure.

[0040] The specific implementation process is: when locking, the L-shaped limit plate 8 rotates with the fixing block 401 of the first flange 4 through the pin shaft 803, and the L-shaped limit plate 8 is flipped upward into the limit groove 402 of the second flange 4; at this time, the waist-shaped hole 801, the aperture of the flange 4 and the limit through hole 603 on the positioning ring 6 coincide with each other, and the connection between the three can be achieved through a single bolt 7. During this period, the combined use of the L-shaped limit plates 8 can also improve the lateral stability of the flange connection; when the L-shaped limit plate 8 needs to be disassembled, the elastic telescopic rod 802 is pulled to make the pin shaft 803 disengage from the fixing block 401. At this time, the L-shaped limit plate 8 can be radially pulled to achieve its separation from the connection relationship between the three.

[0041] Many other changes and modifications can be made without departing from the concept and scope of the utility model. It should be understood that the invention is not limited to specific embodiments, and the scope of the invention is defined by the appended claims.

Claims

1. An air inlet cooling device for an ultra-deep pit nitriding furnace, characterized in that: include: A fan (1) connected to the nitriding furnace (3) for providing air intake for cooling, wherein a butterfly valve (2) for adjusting the air intake volume is installed on the fan (1); The pipe connections of the butterfly valve (2), the nitriding furnace (3) and the fan (1) are all arranged as flange structures, and a plurality of arc-shaped rings that can be extended and retracted in an arc direction are installed at the connection surface by bolts (7), and each arc-shaped ring forms a closed ring structure after being stretched, and a sealing ring (5) for sealing and isolation is sleeved on the outside of the ring structure, and the sealing ring (5) is clamped at the abutment surface of the flange structure.

2. The air inlet cooling device of the ultra-deep pit nitriding furnace according to claim 1 is characterized in that: The flange structure is divided into two opposing flange plates (4), and the two flange plates (4) are connected via bolts (7).

3. The air inlet cooling device of the ultra-deep pit nitriding furnace according to claim 2 is characterized in that: The positioning ring (6) is composed of an arc-shaped moving ring (601) and an arc-shaped fixed ring (602) which are slidably connected to each other. Both surfaces are provided with a limiting through hole (603) with the same diameter as the flange (4). The positioning ring (6) is installed with the bolt (7) through the limiting through hole (603).

4. The air inlet cooling device of the ultra-deep pit nitriding furnace according to claim 3 is characterized in that: An arcuate cavity for mounting the arcuate moving ring (601) is provided in the arcuate fixed ring (602), and a claw is provided at the end thereof to prevent the arcuate moving ring (601) from falling out.

5. The air inlet cooling device of the ultra-deep pit nitriding furnace according to claim 1, characterized in that: A fixing block (401) is fixedly arranged on any flange (4), and a limiting groove (402) is provided on the adjacent flange (4). The fixing blocks (401) and the limiting grooves (402) correspond one to one, and a plurality of the fixing blocks (401) are equidistantly arranged along the circumference of the flange (4).

6. The air inlet cooling device of the ultra-deep pit nitriding furnace according to claim 5, characterized in that: The fixing block (401) is rotatably connected to an L-shaped limiting plate (8) via a pin shaft (803); the other end of the L-shaped limiting plate (8) is interference fit in the limiting groove (402); and the abutting surfaces of the L-shaped limiting plate (8) and the limiting groove (402) are also installed via the bolts (7).

7. The air inlet cooling device of the ultra-deep pit nitriding furnace according to claim 6, characterized in that: The abutting surface between the L-shaped limiting plate (8) and the limiting groove (402) is provided with a waist-shaped hole (801), and the side of the L-shaped limiting plate (8) is integrated with an elastic telescopic rod (802), and the elastic telescopic rod (802) and the pin shaft (803) are coaxially arranged in one body.

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