KR20230090260A - Bellows unit with cooling jacket - Google Patents

Abstract

A bellows unit equipped with a cooling jacket part according to the present invention comprises: a bellows main body with coupling parts formed on both sides and a hollow part inside; and a connection unit installed at each of the coupling parts and including a pair of flange members located on both sides of the coupling part, wherein the bellows main body comprises: an insulating part for primarily insulating the heat in the hollow part when installed; and a cooling jacket part installed outside the insulating part, secondarily insulating the heat transmitted through the insulating part, and having an insulating cooling space for cooling the insulating part. Thus, the present invention can improve insulation efficiency and be prevented from being damaged due to repeated stretching and deformation.

Description

Bellows unit having a cooling jacket

The present invention relates to a bellows unit, and more particularly, to a cooling jacket installed between pipes to ensure fluidity of the roller or to absorb a change in length due to thermal expansion of the pipe by being installed in the bearing part of the galvanized steel sheet support roller. It relates to a bellows unit provided.

In general, piping for passing high-temperature fluids is installed in processes in many fields, such as furnaces, power plants, petrochemicals, refrigeration, metallurgy, nuclear power, air conditioning systems, aviation, construction, automobiles, water treatment, and incinerators.

These pipes are thermally expanded by the heat of the fluid and the length is changed, and as a means for absorbing the length change of the pipes, a bellows unit installed to interconnect the pipes and having elasticity is used.

For example, Korean Utility Model Registration No. 20-0424261 and Patent Registration No. 10-1170808 disclose an expansion joint composed of a pair of coupling parts coupled to mutually facing pipes and a bellows connecting the coupling parts.

This expansion joint absorbs the amount of expansion and contraction caused by the temperature change of the connected pipe by the expansion and contraction of the bellows.

Since these bellows are deformed to absorb the change in length due to thermal expansion of the pipe, it is difficult to install an insulating material on the outside. Therefore, a plurality of fabrics are laminated in the bellows to insulate the fluid passing through the bellows.

On the other hand, in the manufacture of galvanized steel sheet, the support roller supporting the steel sheet to be plated and transported tilts the shaft on both sides of the support roller so that the steel sheet can be located in the center. C.P.C bellows (center position control bellows) are installed to do this.

In this C.P.C bellows, since the support roller is heated by a relatively high-temperature steel plate, insulation is required to prevent damage caused by heat.

Such bellows can increase the insulation effect by forming a thick insulation layer for insulation, but in this case, there is a problem that the elasticity of the bellows is reduced, and it is easily damaged by the tensile force acting by repeated stretching and deformation. There is a problem.

Korean Patent Registration No. 10-0758459 discloses a structure of a sealed bearing box of a roller shaft in a plating bath, and Korean Patent Registration No. 10-2407716 discloses a meandering correction device for a strip.

Registered Utility Model No. 20-0424261 Registered Patent No. 10-1170808 Korean Patent Registration No. 10-0758459 Republic of Korea Patent No. 10-2407716

The present invention is to improve the above problems, and an object of the present invention is to provide a bellows unit having a cooling jacket portion capable of preventing damage due to repeated stretching and deformation while improving insulation efficiency.

Another object of the present invention is to improve the airtightness between the heat insulating members forming the adiabatic cooling space formed therein to prevent the destruction of the heat insulation, and to provide a bellows unit having a cooling jacket portion capable of cooling the bellows body. there is.

Another object of the present invention is to provide a bellows unit having a cooling jacket portion capable of blocking the inflow of outside air toward the hollow part by introducing outside air between the laminated members.

The bellows unit having a cooling jacket part of the present invention for achieving the above object is

A coupling part is formed on both sides, and the bellows body having a hollow inside

It is installed on each of the coupling parts, and has a connection unit including one-phase flange members located on both sides of the coupling unit,

The bellows body has a thermal insulation unit for primary insulation of heat in the hollow during installation, and an adiabatic cooling space installed outside the insulation unit for secondary insulation of the heat transmitted through the insulation unit and cooling the insulation unit. A cooling jacket is provided.

In the present invention, the cooling jacket part is arranged to be spaced apart from the first insulating space forming member and the first insulating space forming member to form the adiabatic cooling space outside the first insulating space forming member surrounding the heat insulating portion, the first insulating space forming member A gap member interposed between the second insulating space forming member and the first and second insulating space forming members to maintain a gap between the first and second insulating space forming members and seal the adiabatic cooling space.

The cooling jacket part is installed outside the second insulating space forming member and is formed of a material having elasticity that can be deformed to correspond to the cooling jacket part so that the sealed state of the adiabatic cooling space can be maintained even if it is deformed by thermal expansion. provide more

The bellows further includes an external sealing portion installed to surround the cooling jacket portion to maintain the shape of the cooling jacket portion and to seal the adiabatic cooling space.

Sealing parts for blocking the inflow of outside air are further provided on the inner circumferential surfaces of the coupling holes formed on the inner circumferential surfaces of the coupling portions for coupling between the ends of the coupling portions of the bellows and the flange member.

As described above, the bellows unit having a cooling jacket portion according to the present invention has a laminated structure of a heat insulation portion and a cooling jacket to insulate air passing through the hollow portion step by step, and a hollow adiabatic cooling space is formed in the cooling jacket portion for cooling. The jacket portion can improve flexibility, and the durability of the bellows can be improved by increasing the cooling effect of the outside of the thermal insulation portion while improving the insulation efficiency of the fluid passing through the bellows.

1 is a perspective view of a bellows unit having a cooling jacket according to an embodiment of the present invention;
2 is an exploded perspective view of a bellows unit having a cooling jacket shown in FIG. 1;
3 is a half-sectional view of a bellows unit having a cooling jacket shown in FIG. 1;
4 is an enlarged cross-sectional view of the bellows unit having a cooling jacket in FIG. 1;
FIG. 5 is a perspective view of the bellows body shown in FIG. 1, and is an enlarged view of the sealing part.
6 and 7 are perspective views showing a state of use of a bellows unit having a cooling jacket according to the present invention.

Referring to the accompanying drawings, an embodiment of a bellows unit having a cooling jacket according to the present invention is shown in FIGS. 1 to 5.

Referring to the drawings, the bellows unit 10 having a cooling jacket according to the present invention includes a bellows body 20 having first and second coupling parts 20a and 20b on both sides, and the bellows body 20 It is installed on the first and second coupling parts 20a and 20b, respectively, and a pair of first and second flange members 41 and 42 coupled to both sides of the first and second coupling parts 20a and 20b and A connection unit 40 including third and fourth flange members 43 and 44 is provided. The connection unit 40 is installed on the second and fourth flange members 42 and 44 to maintain the distance between them, that is, the distance between the first and second coupling parts 20a and 20b on both sides of the bellows body 20. It is further provided with a gap maintaining part 60 for doing.

In addition, the bellows body 20 is installed outside the heat insulating part 21 and the heat insulating part 21 for primary insulating the heat in the hollow part 21 during installation, and the heat transmitted through the heat insulating part 21 In addition to the secondary insulation box, a cooling jacket portion 30 having an adiabatic cooling space 31 for cooling the thermal insulation portion 21 is provided.

The bellows unit having a cooling jacket according to the present invention configured as described above will be described in detail for each component as follows.

The bellows body 20 is formed in a tubular shape having a hollow part 20c therein. The bellows 20 has a central portion having a larger diameter than the diameters of the coupling portions 20a and 20b on both sides, and has a configuration in which a plurality of thin materials are laminated.

The bellows body 20 is installed outside the heat insulating part 21 and the heat insulating part 21 for primarily insulating the heat in the hollow part 20a in the thickness direction from the side of the hollow part 20c, and heat insulating A cooling jacket portion 30 for secondary insulation of the heat transmitted through the portion 21 and a cooling jacket portion to seal the adiabatic cooling space portion 31 while maintaining the shape of the cooling jacket portion 30 ( 30) is provided with an external sealing portion 38 installed to surround it.

The heat insulating part 21 forms an inner wall of the bellows body 20 . The insulator 21 is formed by stacking a fabric sheet in which a ceramic wire is embedded and a ceramic sheet. The heat insulating part 21 is disposed adjacent to the hollow part 20c to primarily insulate the heat in the hollow part 20c and prevent the cooling jacket part 30 from being damaged.

The heat insulating portion 21 includes an expansion and contraction part 22 extending with a relatively larger diameter than the diameter of the coupling part 20a and 20b, and extending from both ends of the expansion and contraction part 22 and having a diameter of the expansion and contraction part 22 It consists of a first extension portion 23 having a smaller diameter and a second extension portion 24 extending radially from an end of the first extension portion 23 . The stretchable portion 22 and the first extension portion 23 have an omega-shaped cross section in the longitudinal direction. In this embodiment, an inner sealing part 25 installed to surround the outside of the heat insulating part 21 of the bellows body 20 may be further provided.

The inner sealing part 25 may be a fiber composite coated with silicon on a PTFE Teflon sheet or glass fiber. The inner sealing part 25 prevents foreign matter penetrating through the heat insulating part 21 from penetrating into the cooling jacket part 30 and damaging the cooling jacket part 30, and the heat insulating part 21 is damaged by internal pressure. prevent deformation.

In addition, the inner sealing portion 25 prevents the cooling jacket portion 30 from being deformed or damaged even when the pressure of the fluid in the hollow portion 20c is transmitted to the cooling jacket portion 30 through the heat insulating portion 21 ( 30) is reinforced.

The cooling jacket part 30 is installed to surround the heat insulating part 21 outside the inner sealing part 25 . The cooling jacket unit 30 has at least one adiabatic cooling space 31 spaced apart from the thermal insulation unit 21 therein so as to secondaryly insulate heat transferred through the thermal insulation unit 21 .

In more detail, the cooling jacket part 30 includes a first insulating space forming member 32 surrounding the heat insulating part 21 and an adiabatic cooling space 31 outside the first insulating space forming member 32. ) Is installed between the second insulating space forming member 33 disposed to be spaced apart from the first insulating space forming member 32 and the first and second insulating space forming members 32 and 33 to form a first, A gap member 34 for maintaining a gap between the two insulating space forming members 32 and 33 and sealing the adiabatic cooling space 31, and a coating member 36 installed outside the second insulating space forming member 33 to provide

The first insulating space forming member 32 is installed to surround the inner sealing part 25 from the outside.

The second insulating space forming member 33 is spaced apart from the first insulating space forming member 32 . The second insulating space forming member 33 is attached to the outer circumferential surface of the gap member 34 so that the gap member 34 is interposed between the first insulating space forming member 32 and the gap member 34 . The first and second insulating space forming members 32 are made of glass fiber fabric or fiber composite fabric in which synthetic resin is applied to glass fiber.

It is preferable that compressed glass fiber fabric compressed to a thin thickness is applied to the first and second insulating space forming members 32 and 33 to minimize the inflow and outflow of air in the adiabatic cooling space 31 . The gap member 34 is installed on the outer circumferential surface of the first insulating space forming member 32 .

The gap member 34 is made of silicon. The gap member 34 is formed by applying liquid silicone to the outer surface of the first insulating space forming member 32 and then curing it. A pair of gap members 34 are provided and are spaced apart from each other along the longitudinal direction of the first insulating space forming member 32 . The gap member 34 has a side corresponding to the first and second extension parts 23 and 24 along the longitudinal direction of the bellows body 20 so that the adiabatic cooling space 31 is formed outside the expansion and contraction part 22. installed on

The gap member 34 is preferably positioned on both sides of the bellows body 20 so as to form an adiabatic cooling space 31 sealed on the outside corresponding to the stretchable part 22 .

Meanwhile, the coating member 36 is installed on the outer circumferential surface of the second insulating space forming member 33 . The coating member 36 is made of thermoplastic resin, silicon, or rubber so that the sealed state of the adiabatic cooling space 31 can be maintained even if the bellows body 20 is deformed to correspond to the change in the distance between the coupling parts 20a and 20b due to external force. It is made of a material with elasticity such as

In this embodiment, the coating member 36 may be formed by curing after applying liquid silicone to the outer surface of the second insulating space forming member 33 .

The outer sealing part 38 is installed to surround the cooling jacket part 30 from the outside. The external sealing portion 38 is formed of a material having elasticity such as thermoplastic resin, silicon, or rubber so as to be deformed in response to the deformation of the cooling jacket portion 30 .

The outer sealing part 38 surrounds the cooling jacket part 30 from the outside to maintain the shape of the cooling jacket part 30, and the first and second insulating space forming members 32 and 33 and the gap member 34 are separated from each other. prevent the phenomenon of In addition, the external sealing part 38 prevents heat leakage of the fluid in the hollow part 20c by maintaining the sealing of the adiabatic cooling space 31 even if the cooling jacket part 30 is damaged due to excessive deformation.

On the other hand, the connection unit 40 installed in the first and second coupling parts 20a and 20b of the bellows body 20 configured as described above has ring-shaped first and second couplings on both sides of the first coupling portion 20a. Flange members 41 and 42 are installed, respectively, and first coupling holes 46 are formed in the first coupling portion 20a and the first and second flange members 41 and 42 for their coupling. . In addition, the first coupling hole 46 is inserted into the first fastening member 47 to couple the first and second flange members 41 and 42 to both sides of the first coupling portion 20a.

In addition, ring-shaped third and fourth flange members 43 and 44 are installed on both sides of the second coupling portion 20b, respectively, and the second coupling portion 20b and the third and fourth flange members 43 ( 44) is formed with a second coupling hole 47 for their coupling. In addition, the second coupling hole is inserted into the second fastening member 48 to couple the first and second flange members 43 and 44 to both sides of the second coupling portion 20a.

The connection unit 40 is connected to the first coupling part 20a and the first and second flange members 41 and 42 installed on both sides thereof have a plurality of third coupling holes 51 for connecting or fixing the bellows unit are formed, and a plurality of fourth coupling holes 52 are formed in the second coupling portion 20b and the third and fourth flange members 43 and 44 installed on both sides thereof to connect or fix the bellows unit. It can be. It is preferable that the diameters of the third and fourth coupling holes 51 and 52 are larger than those of the first and second coupling holes 47 and 46. However, it is not limited thereto.

The inner peripheral surfaces of the first to fourth coupling holes 46, 47, 51, and 52 formed in the first and second coupling portions 20a and 20b and the side surfaces of the first and second coupling portions 20a and 20b, That is, the sealing portion 55 formed by coating silicon is formed on both end surfaces of the bellows body. The sealing part 55 is between the stacked heat insulating part 21, the inner sealing part 25, the first and second insulating space forming members 32 and 33, the gap member 34, and the outer sealing part 28. It has a structure that blocks between them to prevent outside air from entering. The sealing part 55 may be formed of a repair layer to increase airtightness.

The connecting unit 40 further includes a space keeping unit 60, and one side of the space keeping unit 60 is fixed to the second and fourth flange members 42 and 44 constituting the connecting unit, respectively, in a radial direction. It is provided with support pieces 61 and 62 installed as and a spacing bar 65 to which both ends are fixed to the end side of the support pieces 61 and 62. The fixing of both ends of the spacing bar 65 to the support pieces 61 and 62 is provided with threaded portions 66 and 67 on both sides of the spacing bar 65, respectively, and the threaded portion 66 and 67 It can be made by the fastening nuts 68 and 69 coupled to the threaded portion in a state of being inserted into the through hole formed at the end of the support piece. The end of each support piece 61, 62 is located between the fastening nuts coupled to the screw portion.

The gap maintaining unit 60 facilitates the installation of the bellows unit according to an embodiment of the present invention by maintaining a gap between the coupling parts 10 before the bellows 20 are deformed by thermal expansion of the pipe. In addition, the gap maintaining unit 60 adjusts the gap between the fastening nuts 68 and 69 to widen the support pieces 61 and 62 to be movable along the longitudinal direction of the gap maintaining bar 65, so that the bellows 20 The amount of deformation can be adjusted.

As described above, the bellows unit 10 having a cooling jacket according to the present invention, as shown in FIG. When the support roller 101 is tilted so that the plated steel sheet 100 is located at the center of the support roller 101, airtightness of the bearing part is maintained.

In this process, since the furnace and the hollow part of the bellows body 20 have a communication structure, the inside of the bellows body 20 is exposed to relatively high pressure and high temperature. Since the heat insulating part 21 is formed on the inner surface of the bellows body 20, heat can be prevented from being transferred to the surface of the bellows. Since the cooling jacket portion having the space 31 is formed, the heat insulating effect of the heat insulating portion 21 can be enhanced, and since the outer surface of the cooling jacket portion 30 is exposed to the outside air, the outside of the heat insulating portion 21 is cooled. effect can be expected.

In particular, since the sealing part 55 is formed on the end side of the coupling part of the bellows body 20 and the inner circumferential surface of the first and second coupling holes formed in the coupling portion, it is possible to prevent outside air from entering the inside of the furnace through this. , By expanding the air in the adiabatic cooling space 31, leakage to the outside can be prevented.

And, as shown in FIG. 8, when pipes 200 through which high-temperature fluid flows are interconnected using the bellows unit 10 having a cooling jacket according to the present invention, the expansion and contraction of the bellows unit 10 It can absorb thermal expansion and contraction, and as described above, it prevents overheating or damage to the insulation part 21 of the bellows oil body 20, and the end side of the first and second coupling parts 20a and 20b Since the sealing layer 55 is formed on the inner circumferential surface of the 2 and 3 coupling holes formed in the coupling portion, the outside air is passed between the stacked insulation layer, the inner sealing layer, the first and second insulation space forming members constituting the cooling jacket portion, and the sheets constituting the external sealing portion. inflow can be prevented.

As described above, the bellows unit having a cooling jacket according to the present invention protects the heat insulating part, maximizes the heat insulating effect, and prevents the bellows body from deteriorating due to the increase in temperature of the outer surface of the bellows unit.

In addition, the bellows unit having a cooling jacket according to the present invention is an insulating space formed in the cooling jacket 30 even if the bellows 20 is deformed due to a positional change in which the coupling parts 10 get closer to each other as the pipe thermally expands. Since 31 is hollow, the cooling jacket portion 30 can be flexibly deformed and has the advantage of preventing the cooling jacket portion 30 from being damaged.

10: Velo use unit having a cooling jacket
20: bellows body
20a: first coupling part 20b: inner sealing part
30: cooling jacket part 31: insulation space part
32: first insulating space forming member 33: second insulating space forming member
34: gap member

Claims (5)

A coupling part is formed on both sides, and the bellows body having a hollow inside
It is installed on each of the coupling parts and has a connection unit including a pair of flange members located on both sides of the coupling unit,
The bellows body has a thermal insulation unit for primary insulation of heat in the hollow during installation, and an adiabatic cooling space installed outside the insulation unit for secondary insulation of the heat transmitted through the insulation unit and cooling the insulation unit. A bellows unit having a cooling jacket portion, characterized in that it has a cooling jacket portion. According to claim 1,
The cooling jacket unit includes a first insulating space forming member surrounding the heat insulating portion, and a second insulating space forming member disposed spaced apart from the first insulating space forming member to form the adiabatic cooling space outside the first insulating space forming member. and a gap member interposed between the first and second insulating space forming members to maintain a distance between the first and second insulating space forming members and seal the adiabatic cooling space. one bellows unit. According to claim 1,
The cooling jacket portion is installed outside the second insulating space forming member and further includes a coating member formed of a material having elasticity capable of being deformed to correspond to the cooling jacket portion so as to maintain a sealed state of the insulating space portion even if it is deformed by thermal expansion. A bellows unit having a cooling jacket, characterized in that it is provided. According to claim 1,
The bellows unit having a cooling jacket portion, characterized in that the bellows body further includes an external sealing portion installed to surround the cooling jacket portion to maintain the shape of the cooling jacket portion and seal the heat insulation space portion. According to claim 1,
A bellows unit having a cooling jacket, characterized in that a sealing part for inflow of external air is further provided on the inner circumferential surface of the coupling holes formed on the inner circumferential surface of the coupling portion for coupling the end of the coupling portion of the bellows body and the flange member.

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