Low-temperature-resistant metal hose

Abstract

The utility model discloses a low temperature resistant type metal hose, which relates to the technical field of metal hoses and comprises a first metal hose and a second metal hose, the lower end of the first metal hose is fixedly connected with a first connecting flange, and the upper end of the second metal hose is fixedly connected with a second connecting flange. And a fixing bolt is arranged on the inner side of the upper end of the first connecting flange. By adopting the structure, the upper arc plate is positioned and inserted at the ends of the two adjacent fixing bolts on the first connecting flange, and then the lower arc plate is positioned and inserted at the threaded ends of the two adjacent fixing bolts; and finally, a reinforcing bolt is positioned and inserted from the upper end of the upper arc plate, penetrates through the cutting grooves of the first connecting flange and the second connecting flange and the lower arc plate, and then is locked by combining a loosening nut, so that the structure does not protrude on the basis of the original mounting characteristics, and instability caused by collision is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of metal hoses, and particularly relates to a low-temperature resistant metal hose. Background Art

[0002] The natural gas metal hose is composed of three parts: a bellows, a mesh sleeve, and a joint. It is used as a compensation element in various gas and liquid pipeline systems as well as length, temperature, position and angle compensation systems. When connected, the natural gas metal hose is mostly sealed with a flange.

[0003] After searching, a Chinese patent with publication number CN217951579U discloses a natural gas metal hose with a multiple sealing protection structure, including a first protective component and a first connecting flange, the first protective component is installed and connected to the rear end position of the first connecting flange, a first hose body is arranged around the inner side of the first protective component, a second connecting flange is arranged at the front end of the first connecting flange, a second protective component is arranged at the front end of the second connecting flange, a second hose body is arranged around the inner side of the second protective component, fixing screws are arranged around the connection between the first connecting flange and the second connecting flange, and reinforcement components are arranged at both ends of the first connecting flange and the second connecting flange.

[0004] The metal hose in the above-mentioned prior art still has some shortcomings in actual use and operation. For example, on the basis of flange connection, the metal hose is inserted into the outside of the two flanges using a U-shaped metal block, and then is locked and fixed using a limit nut in combination with a threaded round rod. Although this structure can further improve the stability of the connection between the two metal hoses, in actual operation, we found that the outer periphery of the flange is arc-shaped, and the U-shaped metal block is difficult to position during installation and fixation. Moreover, since the metal block is protruding on both sides of the flange, it is easy to be hit, causing the metal block to tilt and loosen. Utility Model Content

[0005] In view of the problems mentioned in the background technology, the purpose of the utility model is to provide a low-temperature resistant metal hose to solve the problems mentioned in the background technology.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A low-temperature resistant metal hose comprises a first metal hose and a second metal hose, wherein the lower end of the first metal hose is fixedly connected to a first connecting flange, the upper end of the second metal hose is fixedly connected to a second connecting flange, a fixing bolt is arranged inside the upper end of the first connecting flange, a threaded end of the fixing bolt movably passes through the second connecting flange and is threadedly connected to a locking nut, and a reinforcement mechanism is symmetrically arranged outside the first connecting flange;

[0008] The reinforcing mechanism comprises an upper arc plate and a lower arc plate, wherein the upper arc plate is plugged and connected to the outside of the end of the fixing bolt, and the lower arc plate is movably plugged to the outside of the thread of the fixing bolt. A reinforcing bolt is arranged at the upper end of the upper arc plate, and grooves are provided on the outside of the first connecting flange and the second connecting flange. The threaded ends of the reinforcing bolts are movably penetrated through the upper arc plate and the lower arc plate and are threadedly connected with loose nuts, and the threaded ends of the reinforcing bolts penetrate the grooves. Through the reinforcing mechanism, the first connecting flange and the second connecting flange at the first metal hose and the second metal hose can be conveniently positioned and reinforced stably.

[0009] The first metal hose comprises a rubber coating layer, a stainless steel mesh layer, a heat insulation layer, a bellows layer and a low-temperature resistant inner tube layer. The stainless steel mesh layer is arranged between the rubber coating layer and the heat insulation layer, and the bellows layer is arranged between the low-temperature resistant inner tube layer and the heat insulation layer.

[0010] As a preferred technical solution, a first positioning hole is symmetrically opened on the inner side of the upper arc plate, and the upper arc plate is plugged into the end of the fixing bolt through the first positioning hole. Through the first positioning hole, the two adjacent fixing bolt ends at the upper end of the upper arc plate and the first connecting flange can be conveniently positioned and plugged.

[0011] As a preferred technical solution, a second positioning hole is symmetrically opened on the inner side of the lower arc plate, and the lower arc plate is plugged into the lower end of the fixing bolt through the second positioning hole. Through the second positioning hole, the two adjacent fixing bolt threaded ends at the lower end of the lower guard plate and the second connecting flange can be conveniently positioned and plugged.

[0012] As an optimal technical solution, through holes are provided on the opposite surfaces of the upper arc plate and the lower guard plate, and the threaded ends of the reinforcement bolts are movable through the through holes of the upper arc plate and the lower arc plate. Through the through holes, the reinforcement bolts can be conveniently inserted into the inner side of the upper arc plate and the lower arc plate.

[0013] As a preferred technical solution, a hexagonal groove is provided at the opening of the through hole on the upper end of the upper arc plate, and the end of the reinforcing bolt is inserted into the inner side of the hexagonal groove. The hexagonal groove can facilitate the positioning and insertion of the end of the reinforcing bolt.

[0014] As a preferred technical solution, the through holes are symmetrically arranged on the sides of the cutting grooves of the first connecting flange and the second connecting flange, and the through holes of the upper arc plate and the lower arc plate correspond to the notches of the cutting grooves. The side grooves on the first connecting flange and the second connecting flange correspond to the through holes of the upper arc plate and the lower arc plate, which can facilitate the connection of reinforcement bolts and square nuts.

[0015] As a preferred technical solution, the inner surface of the low-temperature resistant inner tube layer is provided with an anti-corrosion layer, the inner side of the rubber coating layer is provided with a flame-retardant layer, and a reinforcement decorative layer is fixedly connected between the first metal hose and the first connecting flange and between the second metal hose and the second connecting flange. The flame-retardant layer on the inner side of the rubber coating layer can conveniently improve the flame-retardant effect of the rubber coating layer, and the anti-corrosion layer on the inner wall of the low-temperature resistant inner tube layer can improve the anti-corrosion effect of the low-temperature resistant inner tube layer. The reinforcement decorative layer can improve the firmness and aesthetics of the connection between the first metal hose and the first connecting flange and the second metal hose and the second connecting flange.

[0016] In summary, the utility model mainly has the following beneficial effects:

[0017] First, the upper arc plate is positioned and inserted at the ends of two adjacent fixing bolts on the first connecting flange, and then the lower arc plate is positioned and inserted at the threaded ends of the two adjacent fixing bolts. Finally, the reinforcing bolts are positioned and inserted from the upper end of the upper arc plate and penetrate the cut grooves of the first connecting flange and the second connecting flange and the lower arc plate, and then tightened in combination with the loosening nut, so that the first connecting flange and the second connecting flange of the first metal hose and the second metal hose can be more stably reinforced. In addition, the upper arc plate and the lower arc plate in the structure are installed on the basis of the original fixing bolts on the first connecting flange and the second connecting flange, so that the fixing bolts can cooperate with the positioning of the upper arc plate and the lower arc plate. In addition, the same cut groove is added to the outer side of the first connecting flange and the second connecting flange, which can facilitate the connection of the reinforcing bolts. In addition, the structure does not protrude on the basis of the original installation characteristics, and will not be unstable due to collision.

[0018] Second, through the low-temperature resistant inner pipe layer, during the natural gas transportation process, the pipeline will be affected by internal and external forces. Low temperature can reduce the temperature stress of the pipeline and reduce the risk of pipeline bursting, while the stainless steel bellows layer can protect the low-temperature resistant inner pipe layer, achieving the advantages of high strength and flexibility. The thermal insulation layer can play a role of heat insulation outside the bellows layer, which can avoid the influence of heat conduction on natural gas transportation. The stainless steel mesh layer can further enhance the protection of the internal bellows layer, and the rubber coating layer can play an anti-corrosion and wear-resistant role. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2 It is an exploded view of the reinforcement mechanism of the utility model;

[0021] Figure 3 The utility model Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4It is a schematic diagram of the internal structure of the first metal hose and the second metal hose of the utility model.

[0023] Figure numerals: 1. first metal hose; 101. rubber coating layer; 102. stainless steel mesh layer; 103. heat insulation layer; 104. bellows layer; 105. low temperature resistant inner tube layer; 2. second metal hose; 3. first connecting flange; 4. second connecting flange; 5. fixing bolt; 6. locking nut; 7. reinforcement decorative layer; 8. reinforcement mechanism; 801. reinforcement bolt; 802. cutting groove; 803. loosening nut; 804. upper arc plate; 805. lower arc plate; 9. first positioning hole; 10. through hole; 11. hexagonal groove; 12. second positioning hole; 13. anti-corrosion layer; 14. flame retardant layer. DETAILED DESCRIPTION

[0024] refer to Figures 1 to 4 The low temperature resistant metal hose described in this embodiment includes a first metal hose 1 and a second metal hose 2. The lower end of the first metal hose 1 is fixedly connected with a first connecting flange 3, and the upper end of the second metal hose 2 is fixedly connected with a second connecting flange 4. A fixing bolt 5 is provided on the inner side of the upper end of the first connecting flange 3. The threaded end of the fixing bolt 5 movably passes through the second connecting flange 4 and is threadedly connected with a locking nut 6. A reinforcement mechanism 8 is symmetrically provided on the outer side of the first connecting flange 3.

[0025] The reinforcement mechanism 8 includes an upper arc plate 804 and a lower arc plate 805. The upper arc plate 804 is plugged into the outer side of the end of the fixing bolt 5, and the lower arc plate 805 is movably plugged into the outer side of the thread of the fixing bolt 5. A reinforcing bolt 801 is provided at the upper end of the upper arc plate 804. A groove 802 is provided on the outer side of the first connecting flange 3 and the second connecting flange 4. The threaded ends of the reinforcing bolt 801 are movably penetrated through the upper arc plate 804 and the lower arc plate 805 and are threadedly connected with a loose nut 803. The threaded end of the reinforcing bolt 801 penetrates the groove 802. When reinforcing the first connecting flange 3 of the first metal hose 1 and the second metal hose 2 and the second connecting flange 4, it is only necessary to position the upper arc plate 804 and plug it into the ends of the two adjacent fixing bolts 5 on the first connecting flange 3, and then position and insert the lower arc plate 805 at the threaded ends corresponding to the two adjacent fixing bolts 5. Finally, the reinforcing bolt 801 is inserted from the upper end of the upper arc plate 804 and penetrates the cut grooves 802 of the first connecting flange 3 and the second connecting flange 4 and the lower arc plate 805, and then is tightened in combination with the loose nut 803, so that the first connecting flange 3 and the second connecting flange 4 of the first metal hose 1 and the second metal hose 2 can be more stably reinforced. In addition, the upper arc plate 804 and the lower arc plate 805 in the structure are based on the original installation of the first connecting flange 3 and the second connecting flange 4 by the fixing bolts 5, so that the fixing bolts 5 can cooperate with the positioning of the upper arc plate 804 and the lower arc plate 805. In addition, the same cut groove 802 is added to the outer side of the first connecting flange 3 and the second connecting flange 4, which can facilitate the connection of the reinforcing bolt 801. In addition, the structure does not protrude on the basis of the original installation characteristics, and will not be unstable due to collision.

[0026] The first metal hose 1 includes a rubber coating layer 101, a stainless steel mesh layer 102, a heat insulation layer 103, a bellows layer 104 and a low-temperature resistant inner tube layer 105. The stainless steel mesh layer 102 is arranged between the rubber coating layer 101 and the heat insulation layer 103, and the bellows layer 104 is arranged between the low-temperature resistant inner tube layer 105 and the heat insulation layer 103. Through the low-temperature resistant inner tube layer 105, during the natural gas transportation process, the pipeline will be affected by internal and external forces. The low temperature can reduce the temperature stress of the pipeline and reduce the risk of pipeline bursting. Risk, and the stainless steel bellows layer 104 can protect the low-temperature resistant inner tube layer 105, achieving the advantages of high strength and flexibility. The thermal insulation layer 103 can play a heat insulation role outside the bellows layer 104, which can avoid the influence of heat conduction on natural gas transportation. The stainless steel mesh layer 102 can further enhance the protection of the internal bellows layer 104, and the rubber coating layer 101 can play an anti-corrosion and wear-resistant role. The internal structures of the first metal hose 1 and the second metal hose 2 are the same.

[0027] refer to Figure 2A first positioning hole 9 is symmetrically provided on the inner side of the upper arc plate 804, and the upper arc plate 804 is plugged with the end of the fixing bolt 5 through the first positioning hole 9. A second positioning hole 12 is symmetrically provided on the inner side of the lower arc plate 805, and the lower arc plate 805 is plugged with the lower end of the fixing bolt 5 through the second positioning hole 12. When installing the upper arc plate 804, it is only necessary to plug the two first positioning holes 9 of the upper arc plate 804 into the ends of the two adjacent fixing bolts 5 on both sides of the groove 802 at the upper end of the first connecting flange 3, so as to facilitate the positioning and installation of the upper arc plate 804, and the second positioning holes 12 on the lower arc plate 805 can also facilitate the positioning and plugging of the threaded ends of the fixing bolts 5 located on both sides of the groove 802 at the second connecting flange 4.

[0028] refer to Figure 2 and Figure 3 , through holes 10 are provided on the opposite surfaces of the upper arc plate 804 and the lower guard plate, and the threaded ends of the reinforcing bolts 801 are movable through the through holes 10 of the upper arc plate 804 and the lower arc plate 805. A hexagonal groove 11 is provided at the opening of the through hole 10 at the upper end of the upper arc plate 804, and the end of the reinforcing bolt 801 is inserted into the inner side of the hexagonal groove 11. The through holes 10 are symmetrically arranged on the sides of the cut groove 802 of the first connecting flange 3 and the second connecting flange 4. The through holes 10 of the upper arc plate 804 and the lower arc plate 805 correspond to the notch of the cut groove 802. The through hole 10 of the plate corresponds to the groove 802 of the first connecting flange 3 and the second connecting flange 4. During installation, the upper arc plate 804 and the lower arc plate 805 are plugged in. It is only necessary to insert the reinforcing bolt 801 into and penetrate the through hole 10 and the groove 802 before connecting and fixing it with the loosening nut 803. After the end of the reinforcing bolt 801 is inserted into the hexagonal groove 11, the reinforcing bolt 801 can be limited, which further facilitates the installation using the loosening nut 803. The loosening nut 803 is prevented from loosening by friction, which is a prior art product.

[0029] refer to Figure 4 The inner surface of the low-temperature resistant inner tube layer 105 is provided with an anti-corrosion layer 13, and the inner side of the rubber coating layer 101 is provided with a flame-retardant layer 14. A reinforcement decorative layer 7 is fixedly connected between the first metal hose 1 and the first connecting flange 3 and between the second metal hose 2 and the second connecting flange 4. The anti-corrosion layer 13 on the inner wall of the low-temperature resistant inner tube layer 105 can improve the anti-corrosion effect of the inner wall of the low-temperature resistant inner tube layer 105. The flame-retardant layer 14 on the inner side of the rubber coating layer 101 can improve the flame retardancy of the rubber coating layer 101. The flame-retardant layer 14 is specifically composed of polyvinyl chloride material; the anti-corrosion layer 13 specifically adopts epoxy resin coating.

[0030] Principle and advantages of use: When reinforcing the first connection flange 3 of the first metal hose 1 and the second metal hose 2 and the second connection flange 4, it is only necessary to position and insert the upper arc plate 804 at the ends of the two adjacent fixing bolts 5 on the first connection flange 3, and then position and insert the lower arc plate 805 at the threaded ends of the two adjacent fixing bolts 5, and finally position and insert the reinforcing bolts 801 from the upper end of the upper arc plate 804, penetrate the cut grooves 802 of the first connection flange 3 and the second connection flange 4 and the lower arc plate 805, and then tighten them in combination with the loosening nut 803;

[0031] During use, through the low-temperature resistant inner pipe layer 105, during the natural gas transportation process, the pipeline will be affected by internal and external forces. The low temperature can reduce the temperature stress of the pipeline and reduce the risk of pipeline bursting, while the stainless steel bellows layer 104 can protect the low-temperature resistant inner pipe layer 105, achieving the advantages of high strength and flexibility. The heat insulation layer 103 can play a heat insulation role outside the bellows layer 104, which can avoid the influence of heat conduction on natural gas transportation. The stainless steel mesh layer 102 can further enhance the protection of the internal bellows layer 104, and the rubber coating layer 101 can play an anti-corrosion and wear-resistant role.

Claims

1. A low temperature resistant metal hose, comprising a first metal hose (1) and a second metal hose (2), characterized in that: The lower end of the first metal hose (1) is fixedly connected to a first connecting flange (3), the upper end of the second metal hose (2) is fixedly connected to a second connecting flange (4), a fixing bolt (5) is provided on the inner side of the upper end of the first connecting flange (3), the threaded end of the fixing bolt (5) movably passes through the second connecting flange (4) and is threadedly connected to a locking nut (6), and a reinforcement mechanism (8) is symmetrically provided on the outer side of the first connecting flange (3); The reinforcing mechanism (8) comprises an upper arc plate (804) and a lower arc plate (805), wherein the upper arc plate (804) is plugged into the outer side of the end of the fixing bolt (5), and the lower arc plate (805) is movably plugged into the outer side of the thread of the fixing bolt (5), a reinforcing bolt (801) is provided at the upper end of the upper arc plate (804), and a groove (802) is provided on the outer side of the first connecting flange (3) and the second connecting flange (4), and the threaded ends of the reinforcing bolt (801) are movably penetrated through the upper arc plate (804) and the lower arc plate (805) and are threadedly connected with a loosening nut (803), and the threaded ends of the reinforcing bolt (801) penetrate through the groove (802); The first metal hose (1) comprises a rubber coating layer (101), a stainless steel mesh layer (102), a heat insulation layer (103), a bellows layer (104) and a low-temperature resistant inner tube layer (105), wherein the stainless steel mesh layer (102) is arranged between the rubber coating layer (101) and the heat insulation layer (103), and the bellows layer (104) is arranged between the low-temperature resistant inner tube layer (105) and the heat insulation layer (103).

2. A low temperature resistant metal hose according to claim 1, characterized in that: A first positioning hole (9) is symmetrically opened on the inner side of the upper arc plate (804), and the upper arc plate (804) is plugged into the end of the fixing bolt (5) through the first positioning hole (9).

3. The low temperature resistant metal hose according to claim 1, characterized in that: A second positioning hole (12) is symmetrically opened on the inner side of the lower arc plate (805), and the lower arc plate (805) is inserted through the second positioning hole (12) and the lower end of the fixing bolt (5).

4. The low temperature resistant metal hose according to claim 1, characterized in that: The upper arc plate (804) and the lower guard plate have through holes (10) on their opposite surfaces, and the threaded ends of the reinforcing bolts (801) are movable through the through holes (10) of the upper arc plate (804) and the lower arc plate (805).

5. A low temperature resistant metal hose according to claim 4, characterized in that: A hexagonal groove (11) is provided at the opening of the through hole (10) at the upper end of the upper arc plate (804), and the end of the reinforcing bolt (801) is inserted into the inner side of the hexagonal groove (11).

6. A low temperature resistant metal hose according to claim 4, characterized in that: The through holes (10) are symmetrically arranged on the sides of the cutting grooves (802) of the first connecting flange (3) and the second connecting flange (4), and the through holes (10) of the upper arc plate (804) and the lower arc plate (805) both correspond to the notches of the cutting grooves (802).

7. The low temperature resistant metal hose according to claim 1, characterized in that: The inner surface of the low-temperature resistant inner tube layer (105) is provided with an anti-corrosion layer (13), the inner side of the rubber coating layer (101) is provided with a flame retardant layer (14), and a reinforcement decorative layer (7) is fixedly connected between the first metal hose (1) and the first connecting flange (3) and between the second metal hose (2) and the second connecting flange (4).

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