High-strength vacuum furnace disc type corrugated pipe

Abstract

The utility model provides a high-strength vacuum furnace disc type corrugated pipe, which relates to the technical field of corrugated pipes, and comprises a pipe body, the pipe body adopts a double-wall structure, a lining layer is arranged in the pipe body, a corrugated structure is arranged outside the pipe body, a metal spiral wire is arranged in the pipe body, and the corrugated structure, flexible salient points and the metal spiral wire are matched to form the corrugated pipe. The metal spiral wire is arranged in the pipe body, so that during use, the axial tensile strength and compressive strength of the pipe body are enhanced, the pipe body is prevented from being excessively deformed or broken when bearing axial tensile force or pressure, and meanwhile, the multiple sets of flexible convex points are located on the side of the corrugated structure to be arranged at intervals in a staggered mode, so that the tensile strength and the compressive strength of the pipe body are improved. According to the corrugated pipe, the pipe body and the corrugated structure can be moderately deformed when being pressed, part of external force is absorbed, stress concentration of the corrugated structure is reduced, meanwhile, stress distribution of the corrugated structure is conveniently improved, the anti-fatigue performance of the corrugated structure is improved, and the overall strength and durability of the corrugated pipe are effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bellows, in particular to a high-strength vacuum furnace disc-type bellows. Background Art

[0002] Vacuum furnaces are mainly used for quenching treatment of tool steel, high-speed steel, stainless steel and other materials, solution treatment of stainless steel, titanium and titanium alloy steel and other materials, and annealing or tempering of various magnetic materials. They can also be used for vacuum brazing and vacuum sintering. During the use of the vacuum furnace, bellows are required to connect the various components of the vacuum furnace for operation.

[0003] However, the existing bellows have poor impact resistance and low compressive strength during use. When used in vacuum furnace equipment, the extreme environmental changes produced can easily cause the bellows to break during long-term operation. Therefore, it is necessary to propose a new type of high-strength vacuum furnace disc-type bellows. Utility Model Content

[0004] The purpose of the utility model is to solve the problems of poor impact resistance and low compressive strength during the use of bellows, and the extreme environmental changes generated when used in vacuum furnace equipment, which easily lead to the problem of breakage of the bellows during long-term operation, and to propose a high-strength vacuum furnace disc-type bellows.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a high-strength vacuum furnace disc-type corrugated pipe, including a pipe body, the pipe body adopts a double-wall structure, an inner lining layer is arranged inside the pipe body, a corrugated structure is arranged outside the pipe body, a metal spiral wire is arranged inside the pipe body, the corrugated structure is arranged in a staggered corrugation, a plurality of groups of flexible protrusions are installed at the gap end of the corrugated structure, the plurality of groups of flexible protrusions are located on the side of the corrugated structure to form an interval and staggered arrangement, a continuous cross groove is installed on the side of the corrugated structure, and reinforcing ring ribs are installed on the outer side of the continuous cross groove.

[0006] Preferably, both left and right ends of the tube body are connected with inner plug sleeves, and the inner plug of the inner plug sleeve is connected with an extension part.

[0007] Preferably, a welding point is arranged inside the side end of the extension portion, and a first metal laminate and a second metal laminate are arranged at the side ends of the welding point respectively, and the first metal laminate and the second metal laminate are made of the same material and have the same structure.

[0008] Preferably, a corrosion-resistant layer is provided inside the inner lining layer.

[0009] Preferably, the outer wall surface of the contact gap between the tube body and the corrugated structure is coated with a high temperature resistant layer.

[0010] Preferably, the high temperature resistant layer is set to 0.4 mm.

[0011] Preferably, the corrosion-resistant layer is set to 0.3 mm.

[0012] Compared with the prior art, the advantages and positive effects of the utility model are:

[0013] 1. In the utility model, a metal spiral wire is arranged inside the tube body under the cooperation of a corrugated structure, flexible protrusions and a metal spiral wire, so that when in use, the axial tensile strength and compressive strength of the tube body are enhanced, and the tube body is prevented from being excessively deformed or broken when subjected to axial tension or pressure. At the same time, multiple groups of flexible protrusions are arranged at intervals and staggered on the sides of the corrugated structure, so that the tube body and the corrugated structure can be appropriately deformed when under pressure, absorb part of the external force, and reduce the stress concentration of the corrugated structure. At the same time, it is convenient to improve the stress distribution of the corrugated structure and improve its fatigue resistance. With the cooperation of the first metal laminate and the second metal laminate, the contact area of ​​the tube body under pressure is increased, so that under the same external pressure conditions, the overall compression rate is larger, and the overall strength and durability are effectively improved.

[0014] 2. In the utility model, by using the cooperation of continuous cross grooves and reinforcing ring sheet ribs and placing reinforcing ring sheet ribs on the outer side of the continuous cross grooves, the edge strength and bending resistance of the corrugated structure are further enhanced to prevent edge warping or breakage when subjected to lateral force or bending moment. In addition, with the cooperation of the corrosion-resistant layer and the high-temperature-resistant layer, the resistance of the pipe body to the internal conveying medium or corrosive substances in the surrounding environment is improved, and the heat resistance of the pipe body is enhanced, thereby further ensuring the usability of the pipe body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model provides a main structure schematic diagram of a high-strength vacuum furnace disc-type bellows;

[0016] Figure 2 The utility model provides a schematic diagram of the metal spiral wire installation position structure of a high-strength vacuum furnace disc-type bellows;

[0017] Figure 3 The utility model proposes a high-strength vacuum furnace disc-type bellows Figure 1 The enlarged structural diagram at A in the middle;

[0018] Figure 4 The utility model provides a schematic cross-sectional structure diagram of a tube body of a high-strength vacuum furnace disc-type bellows.

[0019] Legend: 1. Pipe body; 2. Inner plug sleeve; 3. Corrugated structure; 4. Flexible protrusion; 5. Extension part; 6. Welding point; 7. First metal laminate; 8. Metal spiral wire; 9. Continuous cross groove; 10. Reinforced ring rib; 11. Inner lining layer; 12. Corrosion-resistant layer. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0022] Example 1

[0023] like Figure 1-Figure 4 As shown, the utility model provides a technical solution: a high-strength vacuum furnace disc-type corrugated pipe, including a pipe body 1, the pipe body 1 adopts a double-wall structure, an inner lining layer 11 is arranged inside the pipe body 1, a corrugated structure 3 is arranged outside the pipe body 1, a metal spiral wire 8 is arranged inside the pipe body 1, the corrugated structure 3 is arranged in a staggered corrugation, a plurality of groups of flexible protrusions 4 are installed at the gap end of the corrugated structure 3, and the plurality of groups of flexible protrusions 4 are located on the side of the corrugated structure 3 to form an interval and staggered arrangement, a continuous cross groove 9 is installed on the side of the corrugated structure 3, and a reinforcing ring sheet rib 10 is installed on the outer side of the continuous cross groove 9, the left and right ends of the pipe body 1 are plugged with an inner plug resistance sleeve 2, the inner plug of the inner plug resistance sleeve 2 is connected with an extension part 5, a welding point 6 is arranged inside the side end of the extension part 5, and the side ends of the welding point 6 are respectively provided with a first metal laminate 7 and a second metal laminate, and the first metal laminate 7 and the second metal laminate have the same material and the same structure.

[0024] In this embodiment, the pipe body 1 is set to a double-wall structure, so that an inner lining layer 11 is set inside the pipe body 1, and a corrugated structure 3 is set outside, so that the inner lining layer 11 and the corrugated structure 3 cooperate to make the internal medium and the pipe wall have good contact and sealing, and the corrugated structure 3 is used to improve the overall external pressure resistance and flexibility of the pipe body 1, and a metal spiral wire 8 is set inside the pipe body 1, so that when in use, the axial tensile strength and compressive strength of the pipe body 1 are enhanced to prevent the pipe body 1 from being excessively deformed or broken when subjected to axial tension or pressure, and the corrugated structure 3 is set to a staggered corrugation, that is, the undulating direction of the corrugation is alternately changed in the circumferential direction of the pipe body 1, so as to further improve the axial and radial pressure resistance of the pipe body 1, and at the same time reduce the resistance of the fluid when flowing in the pipe, and then a plurality of groups of flexible protrusions 4 are arranged at intervals on the side of the corrugated structure 3, so that the pipe body 1 and the corrugated structure 3 can be appropriately deformed when under pressure, absorb part of the external force, reduce the stress concentration of the corrugated structure 3, and at the same time improve the corrugated structure 3. The stress distribution of the corrugated structure 3 improves its fatigue resistance, and according to the setting of the continuous cross groove 9, the rigidity and stability of the corrugated structure 3 are increased. By reinforcing the placement of the ring sheet ribs 10, it is convenient to further enhance the edge strength and bending resistance of the corrugated structure 3 to prevent edge warping or fracture when subjected to lateral force or bending moment. When in use, the inner plug sleeve 2 is plugged into the left and right ends of the pipe body 1 to enhance the end sealing and connection stability. Then, the extension part 5 is located at both ends of the pipe body 1. According to the needs, the first metal laminate 7 and the second metal laminate are laser welded at the welding point 6 for operation, and then the first metal laminate 7 and the second metal laminate cooperate, so that when the whole is operated, it can withstand a large compression force without plastic deformation, and the setting of the first metal laminate 7 and the second metal laminate can increase the contact area of ​​the pipe body 1 under pressure, so that under the same external pressure conditions, the overall compression rate is greater, effectively improving the overall strength and durability.

[0025] Example 2

[0026] like Figure 1-Figure 4 As shown, a corrosion-resistant layer 12 is arranged inside the inner lining layer 11, and a high-temperature resistant layer is coated on the outer wall surface of the contact gap between the tube body 1 and the corrugated structure 3. The high-temperature resistant layer is set to 0.4 mm, and the corrosion-resistant layer 12 is set to 0.3 mm.

[0027] In this embodiment, by arranging the corrosion-resistant layer 12 inside the inner lining layer 11, it is convenient to improve the resistance of the pipe body 1 to the internal conveying medium or corrosive substances in the surrounding environment when the vacuum furnace overall equipment is operating, and the corrosion-resistant layer 12 is composed of polytetrafluoroethylene and ceramic coating, and the high-temperature resistant layer is coated on the outer wall surface of the contact gap between the pipe body 1 and the corrugated structure 3, so as to improve the tolerance of the pipe body 1 to the external high-temperature environment, facilitate further enhancing the heat resistance of the pipe body 1 in the operation of the vacuum furnace overall equipment, and improve the service life, and the high-temperature resistant layer is composed of silicon carbide and carbon fiber.

[0028] The working principle of this embodiment is as follows: first, the corrosion-resistant layer 12 is arranged inside the inner lining layer 11, and the high-temperature resistant layer is coated on the outer wall surface of the contact gap between the pipe body 1 and the corrugated structure 3, so as to improve the resistance of the pipe body 1 to the internal conveying medium or corrosive substances in the surrounding environment, and enhance the heat resistance of the pipe body 1; then, the corrugated structure 3 is arranged outside the pipe body 1, and a metal spiral wire 8 is arranged inside the pipe body 1, so that when in use, the axial tensile strength and compressive strength of the pipe body 1 are enhanced to prevent the pipe body 1 from excessively deforming or rupturing when subjected to axial tension or pressure; at the same time, multiple groups of flexible protrusions 4 are arranged at intervals and staggered on the sides of the corrugated structure 3, so that the pipe body 1 and the corrugated structure 3 can be appropriately deformed when under pressure, absorb part of the external force, reduce the stress concentration of the corrugated structure 3, and facilitate the improvement of the stress distribution of the corrugated structure 3 and improve its fatigue resistance; then, the addition The strong annular ribs 10 are placed on the outer side of the continuous cross grooves 9 to further enhance the edge strength and bending resistance of the corrugated structure 3, prevent edge warping or breakage when subjected to lateral force or bending moment, and when in use, the inner plug sleeve 2 is connected to the left and right ends of the tube body 1 to enhance the end sealing and connection stability. Then, the extension part 5 is located at both ends of the tube body 1. According to needs, the first metal laminate 7 and the second metal laminate are laser welded at the welding point 6, and then the first metal laminate 7 and the second metal laminate cooperate to facilitate the overall operation. When the first metal laminate 7 and the second metal laminate are operated, it is convenient to withstand a large compression force without plastic deformation, and the setting of the first metal laminate 7 and the second metal laminate can increase the contact area of ​​the tube body 1 under pressure, so that under the same external pressure conditions, the overall compression rate is greater, effectively improving the overall strength and durability.

[0029] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A high-strength vacuum furnace disc-type bellows, characterized in that: The invention comprises a tube body (1), wherein the tube body (1) adopts a double-wall structure, an inner lining layer (11) is arranged inside the tube body (1), a corrugated structure (3) is arranged outside the tube body (1), a metal spiral wire (8) is arranged inside the tube body (1), the corrugated structure (3) is arranged in a staggered corrugation, a plurality of groups of flexible protrusions (4) are installed at the gap end of the corrugated structure (3), the plurality of groups of flexible protrusions (4) are located at the side of the corrugated structure (3) to form an interval staggered arrangement, a continuous cross groove (9) is installed at the side of the corrugated structure (3), and a reinforcing ring sheet rib (10) is installed on the outer side of the continuous cross groove (9).

2. The high-strength vacuum furnace disc-type bellows according to claim 1, characterized in that: The left and right ends of the tube body (1) are both plugged with an inner blocking sleeve (2), and the inner part of the inner blocking sleeve (2) is plugged with an extension part (5).

3. The high-strength vacuum furnace disc-type bellows according to claim 2 is characterized in that: A welding point (6) is arranged inside the side end of the extension portion (5), and a first metal laminate (7) and a second metal laminate are arranged at the side ends of the welding point (6), respectively. The first metal laminate (7) and the second metal laminate are made of the same material and have the same structure.

4. The high-strength vacuum furnace disc-type bellows according to claim 1, characterized in that: A corrosion-resistant layer (12) is arranged inside the inner lining layer (11).

5. The high-strength vacuum furnace disc-type bellows according to claim 1, characterized in that: The outer wall surface of the contact gap between the tube body (1) and the corrugated structure (3) is coated with a high temperature resistant layer.

6. The high-strength vacuum furnace disc-type bellows according to claim 5, characterized in that: The high temperature resistant layer is set to 0.4 mm.

7. The high-strength vacuum furnace disc-type bellows according to claim 4, characterized in that: The thickness of the corrosion-resistant layer (12) is set to 0.3 mm.

Images