KR20200023820A - Expansion jointing apparatus - Google Patents

Abstract

The present invention relates to an expansion joint apparatus that comprises: an internal pipe through which a fluid flows therein; an expansion pipe expanding and moving within the internal pipe; a packing housing connected to at least one end of the internal pipe to seal the expansion pipe and supporting movement of the expansion pipe; an external pipe provided separately outside the internal pipe and the packing housing; and an expansion pipe protecting chamber adiabatically connected to one end of the packing housing for being provided to cover the outside of the expansion pipe. The expansion pipe protecting chamber has one end connected to an end portion of the packing housing via welding to be connected thereto while having the same outer diameter as that of the packing housing, and the other end adiabatically connected to the external pipe by an adiabatic connection unit, forms a leaked fluid remaining space, where a fluid leaked from the internal pipe remains, with the expansion pipe interposed therebetween, arranges a leaked fluid discharge pipe for discharging the leaked fluid from the leaked fluid remaining space to the outside such that the leaked fluid discharge pipe is withdrawn to the outside, and arranges a covering such that the covering is extended in a longitudinal direction from an end portion for forming a tip end as a free end where the covering is for blocking an outer circumference of a guide recess formed to be stepped at a portion with which the packing housing comes into contact on an outer circumferential surface of the expansion pipe to slide-move by expansion.

Description

Expansion joints {EXPANSION JOINTING APPARATUS}

The present invention relates to an expansion joint, and relates to an expansion joint for transferring a high-temperature fluid, such as hot water or steam, or preventing deformation of the pipe in which expansion and contraction occurs due to temperature deformation factors.

In general, hot fluid such as hot water or steam produced in a plant facility such as a cogeneration plant and an energy integrated management facility is supplied to a place of use through a pipe.

As such, the piping through which the hot fluid is transferred is supplied through the insulated piping to minimize energy loss during transportation. As an example of such heat-insulated piping, a heat-insulated double tube is typically used.

The adiabatic double tube is composed of an inner tube through which a fluid flows, and an outer tube disposed to be spaced apart from the inner tube and having an insulating space.

Such a double insulation tube may be stretched or deformed due to temperature change caused by high temperature fluid, or if it is installed in the ground, it may be deformed due to settlement of the ground or the influence of the surrounding features. This may cause deformation of the adiabatic double tube.

Accordingly, in the related art, expansion joints are installed to prevent expansion and contraction occurring in pipes such as a heat insulation double pipe. Expansion joints are installed at a certain distance according to various conditions, such as pipe diameter, to absorb the expansion and contraction of the pipe to prevent deformation of the pipe.

1 is a cross-sectional view of the expansion joint according to the prior art, Figure 2 is an enlarged view of portion A of FIG.

1 and 2, a conventional expansion joint device 1 includes an inner tube 10 through which a fluid passes, a packing housing 20 connected to at least one end of the inner tube 10, and a packing housing ( 20) includes a stretchable tube 30 which is inserted into and stretched.

In addition, the packing housing 20 seals the expansion tube 30 and supports the movement of the expansion tube 30, and a packing cylinder 25 for supplying a sealing agent to the packing housing 20 for internal sealing is provided. do. In addition, the outer tube 40 is provided to the outside of the inner tube 10 and the packing housing 20 spaced apart.

In addition, one end of the expansion joint device (1) is insulated and connected to the packing housing 20 via the heat insulating connection portion 60, the other end is connected to the expansion tube protection chamber 50.

The flexible tube protection chamber 50 is connected to the support 42 extending from the outer tube 40.

On the other hand, the heat insulating connection portion 60 is the first flange 62 formed at the end of the flexible tube protection chamber 50 facing the packing housing 20, and the packing housing 20 facing the first flange 62 The fastening member 66 is installed to bind the second flange 64 and the first flange 62 and the second flange 64 formed to correspond to the first flange 62 and the second flange 64. Insulation member 68 is interposed.

In addition, when the leakage occurs in the sealing agent of the packing housing 20, the expansion pipe protection chamber 50 is connected to a leak detection tube 52 for informing the leakage of the leaked high temperature fluid to the outside is connected. do.

On the other hand, the outer tube 40 is provided with a sealing agent inlet 46 for filling the sealing agent into the packing housing 20 through the packing cylinder 25.

In addition, the support part 42 supports the packing housing 20 and the inner tube 10 as it is connected to the expansion tube protecting chamber 50. In addition, at the end of the support portion 42, a sealing packing 44 in close contact with the expansion tube 30 is installed. The sealing packing 44 shields the space enclosed by the flexible tube protection chamber 50 so that the hot fluid leaked from the packing housing 20 cannot be discharged between the inner tube 10 and the outer tube 40.

In the conventional expansion joint device 1 configured as described above, when expansion occurs due to a high temperature fluid passing through the inner tube 10, the expansion tube 30 is expanded in the packing housing 20, and deformation is prevented. .

However, the conventional expansion joint device 1 has the following problems.

First, as the packing housing 20 is positioned adjacent to the inner tube 10, radiant heat generated from the inner tube 10 is transmitted to the packing housing 20, and the support 42 to which the packing housing 20 is connected is provided. It is transmitted to the outer tube 40 through the has become a factor to lower the thermal insulation efficiency.

Second, one end of the expansion tube protection chamber 50 is coupled to the packing housing 20 via the heat insulating connection 60, but is not completely in contact due to the heat insulating member 68 interposed between the heat insulating connection (60). As a result, rocking may occur in the packing housing 20, and thus, the sealing packing 44 installed on the support 42 may be easily damaged.

Third, the packing housing 3 and the flexible tube protective sleeve 71 are flanged to each other, thereby failing to provide a smooth coupling structure having the same outer diameter, thereby causing interference in the formation of the heat insulating layer 92, so that the heat insulating layer 92 Difficult to form stable).

Fourth, the leakage fluid discharge pipe 91 is provided in the packing housing 3, the leakage fluid due to the space limitation of the leakage fluid space (C) forming a narrow gap between the packing housing (3) and the expansion pipe (5) When a small amount is passed by not properly diffused to the leaking fluid discharge pipe 91 side, it becomes difficult to identify the leaking fluid through the leaking fluid discharge pipe 91.

In order to solve the above problems, the present invention is to ensure that the expansion tube protection chamber connected to the packing housing for sealing the expansion tube is insulated from the outer tube, the heat transmitted from the packing housing and the heat radiated from the expansion tube is external It can block the delivery to the pipe, and the packing housing and the expansion tube protective sleeve is connected to the same outer diameter so that the heat insulating material can be easily provided on the outside, it is easy to check whether the leakage of leakage fluid, the sliding of the packing housing It is an object of the present invention to provide an expansion joint device for preventing the inflow of foreign substances into the guide groove while also providing excellent installation or assembly of the covering to block the exposure of the guide groove for guiding the guide groove.

Expansion joint according to an embodiment of the present invention for solving the above technical problem, the inner tube through which the fluid passes; An expansion pipe that is elastically moved inwardly of the inner pipe; A packing housing connected to at least one end of the inner tube to seal the expansion tube and supporting movement of the expansion tube; An outer tube spaced apart from the inner tube and the outside of the packing housing; And a flexible tube protection chamber that is thermally connected to one end of the packing housing to cover the outside of the expansion tube, wherein the expansion tube protection chamber has one end connected to the end of the packing housing by welding. Is connected to the same outer diameter of the outer diameter of, the other end is insulated and connected to the outer tube by a heat insulating connection, the leakage fluid remaining space for remaining the leakage fluid from the inner tube is formed between the expansion tube, the leakage The outer side of the guide groove is provided so that the leakage fluid discharge pipe for discharging the leaked fluid from the fluid remaining space to the outside, the step is formed in the sliding housing by the packing housing in contact with the packing housing in the outer peripheral surface of the expansion pipe From the end so that the covering for blocking the circumference forms the free end It may be provided to extend along the two-way.

The heat insulation connecting portion, the first support portion extending in the direction of the inner tube from the outer tube; A second support portion extending corresponding to the first support portion at one end of the flexible tube protection chamber; A fastening member for coupling the first support portion and the second support portion; And a heat insulating member interposed between the first support part and the second support part.

The first support portion and the second support portion are formed through holes that correspond to each other, the heat insulating member, a communication hole communicating with the through hole is formed between the first support portion and the second support portion, the fastening member The fixing bolt is inserted into and fastened to the through hole and the communication hole, and the fixing bolt is formed of a heat insulating material to block heat transfer between the first support part and the second support part, or the first support part. And the washer of the insulating material may be inserted into the binding portion with the second support.

A heat dissipation coating part provided on an outer circumferential surface of the outer tube and the heat insulating connection part, wherein the heat dissipation coating part is coated on an outer circumferential surface of the outer tube to block heat emission and prevent corrosion; A second heat shield coating layer laminated on the first heat shield coating layer to block heat release; And a third thermal barrier coating layer laminated on the second thermal barrier coating layer to block heat release, wherein the first thermal barrier coating layer has a use temperature of −60 ° C. to 250 ° C. and a thickness within 0.5 mm. The second heat shield coating layer, the use temperature is -60 ℃ to 220 ℃, coated with a thickness of 0.5mm to 1.5mm, the third heat shield coating layer, the use temperature is -60 ℃ to 120 ℃, and may be coated with a thickness of 1mm to 2mm.

The heat dissipation coating part may further include a heat shrink sheet provided outside.

The expansion joint according to the present invention is such that the expansion pipe protection chamber connected to the packing housing for sealing the expansion pipe is insulated from the outer pipe, the heat transmitted from the packing housing and the heat radiated from the expansion pipe is transferred to the outer pipe. To prevent waste of enormous energy due to heat loss, thereby improving thermal efficiency and reducing energy costs.

In addition, the expansion joint device of the present invention, because the expansion pipe can be moved in accordance with the temperature change when connecting the pipe, it can improve the durability, it is easy to confirm that the expansion pipe is leaked to the sealing part during the expansion movement In this case, the sealing material may be injected to effectively maintain the sealing property, thereby preventing the generation of condensate, leakage of high temperature fluid, and the like, and improving durability.

In addition, the expansion joint device of the present invention, the packing housing and the expansion tube protective sleeve is connected to the same outer diameter so that the heat insulating material can be easily provided on the outside thereof, and it is easy to check whether the leakage fluid leakage, the packing housing The installation or assembly of the covering to block the exposure of the guide groove for guiding the sliding may be excellent, and the foreign material may be blocked into the guide groove.

1 is a cross-sectional view of the expansion joint according to the prior art.
FIG. 2 is an enlarged view of a portion A of FIG. 1. FIG.
Figure 3 is a perspective view of the expansion joint according to an embodiment of the present invention.
Figure 4 is a cross-sectional view of the expansion joint according to an embodiment of the present invention.
5 is an enlarged view of a portion B of FIG. 4.
6 is a cross-sectional view of the expansion joint according to another embodiment of the present invention.

Certain terms are defined herein for convenience of understanding the invention. Unless defined otherwise herein, scientific and technical terms used herein have the meanings that are commonly understood by one of ordinary skill in the art. Also, unless specifically indicated in the context, the singular forms "a", "an", and "the" are intended to include their plural forms as well.

3 is a perspective view of the expansion joint according to an embodiment of the present invention, Figure 4 is a cross-sectional view of the expansion joint according to an embodiment of the present invention.

Hereinafter, with reference to Figures 3 and 4, the expansion joint according to an embodiment of the present invention will be described.

In one embodiment of the present invention, the expansion joint device 100 may be installed in a pipe through which a high temperature fluid, such as hot water or steam, passes, and may be provided to absorb expansion and contraction of the pipe according to temperature change. The pipe through which the fluid passes may be provided in a heat insulation double pipe 101 structure for heat insulation.

The expansion joint device 100 is provided between the inner tube 110 and the outer tube 140 and between them to absorb the elastic deformation and to seal the inside of the packing housing 120, expansion tube 130, and expansion Tube protection chamber 150 may be included.

In detail, the inner tube 110 is a pipe through which a high temperature fluid passes, and the packing housing 120 may be connected to at least one end thereof.

The inner tube 110 is the packing housing 120 is connected to only one side can be connected to the expansion tube 130 only in one direction, both sides of the packing housing 120 is connected to the expansion tube 130 It is also possible to connect.

When the inner housing 110 is connected to the packing housing 120 only on one side, the other side of the inner tube 110 may be coupled to the inner tube (101a) of the insulating double tube 101 by welding or the like. The inner tube 110 may have an inner diameter larger than an outer diameter of the expansion tube 130 in the direction in which the expansion tube 130 is inserted. In addition, the inner tube 110 may be formed in such a way that when the packing housing 120 is connected to only one side, the outer diameter of the portion connected to the inner tube 101a of the insulating double tube 101 is gradually reduced.

In addition, the outer tube 140 may be provided in the form of a cylindrical pipe that is spaced apart from the inner tube 110 and the expansion tube 130 to shield the outside. The outer tube 140 may be provided to suppress the heat of the inner tube 110 is discharged to the outside, for this purpose, the heat insulating material 112 for insulation is filled between the outer tube 140 and the inner tube 110. Can be. As the heat insulator 112, a material such as glass wool may be used. In addition, various shapes and materials may be used.

The outer tube 140 may be coupled by the appearance and welding of the adiabatic double tube 101.

In addition, the packing housing 120 may be in close contact with the outer diameter of the expansion tube 130 to support the expansion tube 130, and at the same time may block the flow of high-temperature fluid passing through the inner tube 110 to the outside.

5 is an enlarged view of a portion B of FIG. 4.

Referring to FIG. 5, the packing housing 120 of this embodiment may include a pipe-shaped housing body 122 that is welded to and coupled to an inner end of the inner tube 110. An inner circumferential surface of the housing body 122 may have a packing groove 124 into which a sealing member is inserted to maintain airtightness.

Specifically, the packing groove 124 may be inserted into a packing material 124a such as a packing powder in the central portion, the packing material 124a to prevent the leakage of the packing material 124a on both sides of the expansion pipe 130 A packing ring 124b may be provided to seal a gap of the gap.

The packing ring 124b may be provided in pairs on both sides of the packing material 124a, or may be provided in multiple pairs.

As the packing ring 124b, graphite-type Teflon fiber aramid fiber packing (GFO and aramid fiber packing), graphite fiber packing, and the like, which are known to have excellent heat resistance and airtightness, may be used.

In addition, the packing housing 120, the slip guide 123 is provided at both ends of the inner peripheral surface of the housing body 122, while maintaining the concentricity with the expansion tube 130, while stably moving the expansion and contraction of the expansion tube 130 I can support it.

On the other hand, the packing housing 120, the packing material 124a inserted into the packing groove 124 in the process of supporting the stretching movement of the expansion pipe 130 may be insufficient or lose the function, for this purpose packing material 124a The packing cylinder 125 for supplying () may be connected.

The packing cylinder 125 may be spaced apart from each other at a predetermined angle along the circumference of the packing housing 120. For example, the packing cylinder 125 is two when the normal diameter size 20 to 65A, three to 80 to 150A, five to 200 to 250A, six to 300 to 350A, 400 to 450A In the case of 8, 500 to 1000A 10 can be installed at an isometric angle along the circumferential direction.

Here, the installation position or the number of the packing cylinder 125 is, for example, may be changed according to the use environment or purpose, and is not limited by this embodiment.

In addition, the packing cylinder 125 is described as being arranged in a line along the circumferential direction, it is also possible to be arranged in two or more rows to maintain a more complete airtight.

In addition, the packing cylinder 125 is formed in the packing housing 120 and has a cylinder body 126 having an injection path, a cylinder connecting member 127 fastened to the cylinder body 126 and formed with an injection path 127a at the center thereof. , And a cylinder cap 128 fastened to the upper portion of the injection passage 127a of the cylinder connecting member 127.

The outer tube 140 may have an opening and closing hole for exposing the packing cylinder 125 to the outside at a position corresponding to the cylinder cap 128 of the packing cylinder 125. Sleeve cover 146 is coupled to the opening and closing may expose or shield the cylinder cap 128 to the outside.

In addition, the opening and closing port may be provided with a sleeve guard 148 extending to the cylinder cap (128).

The sleeve guard 148 extends to surround the packing cylinder 125, and may be provided in a length that does not contact the packing housing 120. As such, the sleeve guard 148 may block heat from being transmitted as it is not in contact with the packing housing 120.

In addition, the sleeve guard 148 may shield the periphery so that the heat insulating material 112 filled between the inner tube 110 and the outer tube 140 does not cover the cylinder cap 128, and thus the packing cylinder 125 As the cylinder cap 128 is exposed without interfering with the heat insulator 112, the packing material 124a may be easily injected through the packing cylinder 125.

The sleeve guard 148 may prevent the material provided between the inner tube 110 and the outer tube 140, for example, the heat insulating material 112, from flowing into the upper portion of the cylinder cap 128.

When the packing cylinder 125 is to fill or refill the packing material 124a in the central packing groove 124, the sleeve cover 146 of the outer tube 140 and the cylinder cap 128 of the packing housing 120 ), And the packing material 124a may be injected into the injection path 127a of the cylinder connecting member 127 by inserting an injection tool (not shown) into the opening and closing hole.

The expansion tube 130 may be expanded and moved inside the inner tube 110, and may be supported by the packing housing 120.

The inner tube 101a of the insulating double tube 101 may be coupled to the outer side of the expansion tube 130 by welding or the like.

Preferably, the expansion pipe 130 may be formed as a guide groove 132 in which a portion where the packing housing 120 contacts is stepped inward. The guide groove 132 may be in contact with and supported by the packing housing 120, and the movement of the expansion pipe 130 may be guided during expansion and contraction.

The guide groove 132 determines the length of the stretchable movement of the stretchable tube 130 and may determine the length according to the use environment or purpose.

In addition, the end of the guide groove 132 may be coupled to the separation prevention pin 134, the packing housing 120 is caught in order to prevent the departure from the expansion pipe 130 is coupled.

On the other hand, one end of the packing housing 120 may be a thermally connected to the expansion tube protection chamber 150 provided to cover the expansion pipe 130 outside.

The expansion tube protection chamber 150 may be formed in the form of a cylindrical pipe having an outer diameter corresponding to that of the packing housing 120. The expansion tube protection chamber 150 has one end connected to the end of the packing housing 120 by welding so as to be connected to the same outer diameter as the outer diameter of the packing housing 120, thereby causing no interference when preparing the outer insulation 112. Insulating material 112 is easily provided so that the other end can be thermally connected to the outer tube 140 by the heat insulating connector 160, and also extends to the outer side of the elastic tube 130 and the elastic tube 130 and May be configured as a free end that is not spaced apart in contact.

In addition, the expansion pipe protection chamber 150 is a leaky fluid remaining space (C) of the gap form to leave a portion of the high temperature fluid passing through the inner tube 110, due to the packing abnormality of the packing housing 120, etc. ) May be formed.

In addition, a leakage fluid remaining space (C) is formed at one side of the expansion pipe protection chamber 150 to maintain the leakage fluid from the inner pipe (110) between the expansion pipe (130), the leakage fluid remaining space (C) The leakage fluid discharge pipe 152 for discharging the leakage fluid from the outside may be provided to be drawn outward. Therefore, it is advantageous to secure the leaked fluid remaining space C, and to be advantageous in the leakage fluid remaining and diffusion in the leaked fluid remaining space C, so that even a small amount of leaked fluid is passed through the leaked fluid discharge pipe 152. Check for leaks.

On the other hand, the expansion pipe protection chamber 150 is the other end configured as a free end is insulated through the outer tube 140 and the heat insulating connection portion 160, it can be constrained.

The thermal insulation connector 160 may be provided such that the outer tube 140 and the flexible tube protection chamber 150 are constrained to each other, but are connected to each other in a separated state, so that heat is not transmitted.

In detail, the heat insulation connection part 160 corresponds to the first support part 162 extending from the outer tube 140 to the inner tube 110 and the first support part 162 at one end of the expansion tube protection chamber 150. It may include an extended second support 164.

In addition, the first support part 162 and the second support part 164 may be bound by the fastening member 166, and at this time, the first support part 162 and the second support part 164 to block the heat transfer. The heat insulating member 168 may be interposed.

As such, the heat insulating connection part 160 may couple the first support part 162 and the second support part 164 by the fastening member 166, but between the first support part 162 and the second support part 164. The heat of the second support part 164 is not transmitted to the first support part 162 by the interposed heat insulating member 168.

That is, the expansion tube protection chamber 150, as one end is connected to the packing housing 120, the heat delivered from the high temperature fluid passing through the inner tube 110 can be conducted and transmitted. In addition, as the expansion pipe protection chamber 150 is disposed adjacent to the expansion pipe 130, the heat of the expansion pipe 130 may be radiated and transmitted.

As the expansion tube protection chamber 150 is connected to the outer tube 140 by the heat insulating connector 160, the heat transmitted or radiated from the expansion tube 130 and the inner tube 110 is the second support portion 164. Although transmitted to, but transmitted to the first support portion 162 by the heat insulating member 168 may be blocked.

Here, the first support portion 162 and the second support portion 164 may be extended to face each other in the outer tube 140 and the flexible tube protection chamber 150, and correspond to each one side facing each other disposed Through holes may be formed.

In addition, the heat insulating member 168 may have a communication hole communicating with the through hole between the first support part 162 and the second support part 164.

The fastening member 166 may include a fixing bolt inserted into and fastened to the through hole and the communication hole. Here, any one of the through holes formed in the first support part 162 and the second support part 164 may be formed with a spiral groove fastened to the fixing bolt, and the other may be penetrated so that the fixing bolt does not contact. .

Preferably, the fixing bolt may be formed of a heat insulating material to block heat transfer between the first support part 162 and the second support part 164. In addition, when the fixing bolt is coupled to the first support part 162 and the second support part 164, a washer of a heat insulating material may be inserted into a binding portion between the first support part 162 and the second support part 164. .

In addition, any one of the through holes formed in the first support part 162 and the second support part 164 is helically coupled to the fixing bolt, and the other through hole is insulated to block contact with the fixing bolt. It is also possible to insert further bushings of material.

In addition, in the present embodiment, the fastening member 166 is provided as a fixing bolt, and is inserted into one of the through holes formed in the first support part 162 and the second support part 164 and inserted into the other. Although described as being coupled to the through-hole spirally, the coupling structure of the fastening member 166 is not limited and may be variously modified. For example, the fixing bolt may pass through both of the through holes formed in the first support part 162 and the second support part 164, and the first support part 162 and the second support part 164 are provided by nuts fastened to opposite sides. It is also possible to bind).

In addition, in the present embodiment, the first support part 162 and the second support part 164 may be provided as ring-shaped flanges. In addition, the heat insulation connecting portion 160 may be provided at a plurality of first support portions 162 and second support portions 164 along the circumferential direction.

Here, the installation position or the number of the heat insulation connecting portion 160 is, for example, may be changed depending on the use environment or purpose, and is not limited by this embodiment.

In addition, the expansion pipe protection chamber 150 is for blocking the outer periphery of the guide groove 132 is formed stepped in the sliding housing by the packing housing 120 in contact with the outer circumferential surface of the expansion pipe 130 The covering 154 may be provided by welding or the like such that the covering 154 extends in the longitudinal direction from the end portion.

The covering 154 may have a cylindrical pipe shape having a predetermined length, extend from the flexible tube protecting chamber 150, and may be provided to cover the guide groove 132. When 150 is stretched along the guide groove 132 of the expansion tube 130, the guide groove 132 is not exposed to the outside, and foreign matters such as external to the guide groove 132 can be blocked It is provided at the end of the expansion tube protection chamber 150, the end forms a free end so that no additional measures are required for assembly.

The extended length of the covering 154 may be determined according to the length of the guide groove 132 and the stretchable length of the stretchable tube 130.

In addition, the expansion joint device 100 of the present embodiment may further include a heat dissipation coating unit 170 surrounding the outer circumference of the outer tube 140 to prevent heat damage from the outer circumference of the outer tube 140. have.

The heat dissipation coating unit 170 is coated on the outer surface of the outer tube 140, the first heat shield coating layer 172 and the first heat shield coating layer 172 to serve as a heat shield and rust preventive and thermally cut The second heat shield coating layer 174 and a third heat shield coating layer 176 laminated on the second heat shield coating layer 174 and thermally cut may be included.

The first heat shield coating layer 172 may be coated on the outer surface of the outer tube 140 to block heat release of the outer tube 140. In addition, the first heat shield coating layer 172 may have a rust preventing function to remove corrosion of the outer tube 140 surface.

In one example, the temperature of the fluid passing through the inner tube 110 may be about 270 ℃, this temperature is dropped in the process of passing through the inner tube 110 is about 150 ℃ or less on the outer surface of the outer tube 140 May be lowered.

In addition, as the first heat shield coating layer 172, a material which can be used at -60 ° C to 250 ° C may be selected, and as an example, a brand name “ANTICOR” manufactured by KORUND Corporation may be used. . The first heat shield coating layer 172 is preferably coated to a thickness within about 0.5mm.

The first heat shield coating layer 172 blocks heat dissipation of the outer tube 140, so that the temperature outside the first heat shield coating layer 172 may be lowered to about 145 ° C. to 150 ° C. FIG.

In addition, the second heat shield coating layer 174 may be laminated on the first heat shield coating layer 172 to block heat release of the first heat shield coating layer 172.

For example, the second heat shield coating layer 174 may be selected from a material that can be used at -60 ℃ to 220 ℃, for example, may be used as a brand name "CLASSIC" product of KORUND (KORUND). The second heat shield coating layer 174 is preferably coated with a thickness of about 0.5mm to 1.5mm.

Here, the external temperature of the first heat shield coating layer 172 may be lowered to about 145 ° C to 150 ° C, and may be lowered to about 100 ° C to 145 ° C while passing through the second heat shield coating layer 174. .

In addition, the third heat shield coating layer 176 may be laminated on the second heat shield coating layer 174 to block heat release of the second heat shield coating layer 174. The third heat shield coating layer 176 may be used at a temperature lower than the use temperature of the second heat shield coating layer 174.

The third heat shield coating layer 176 may be selected from a material that can be used at -60 ° C to 120 ° C. For example, a brand name “PACADE” manufactured by KORUND may be used. The third heat shield coating layer 176 is preferably coated with a thickness of about 1.0mm to 2.0mm.

Here, the external temperature of the second heat shield coating layer 174 may be lowered to about 100 ° C. to 145 ° C., and may be lowered to about 40 ° C. to 100 ° C. while passing through the third heat shield coating layer 176. .

On the other hand, in the present embodiment, the first heat shield coating layer 172, the second heat shield coating layer 174 and the third heat shield coating layer 176 has a difference in the applicable temperature, there is a difference in rust prevention function, etc. It is desirable to observe the order in which they are made and the thickness of the coating.

Although the heat dissipation coating unit 170 is described as being coated on the outside of the outer tube 140 in the present embodiment, it is also possible to further coat the inner or outer tube 110 of the outer tube 140.

Meanwhile, when the heat dissipation coating unit 170 is coated inside the outer tube 140, a first heat shield coating layer 172 is formed on an inner circumferential surface of the outer tube 140, and the first heat shield coating layer 172 is formed on the inner circumferential surface of the outer tube 140. The third heat shield coating layer 176 may be laminated coated, and the second heat shield coating layer 174 may be laminated coated on the third heat shield coating layer 176. The coating order of the heat dissipation coating unit 170 may be determined according to the rust prevention function and the use temperature.

In addition, the heat dissipation coating portion may also be coated on the heat insulation connection portion 160 connecting the outer tube 140 and the expansion tube protection chamber 150, and may minimize heat loss transmitted through the heat insulation heat dissipation portion 160.

In this embodiment, the thermal insulation connector 160 is thermally insulated so as not to be directly connected, but may have a structure in which heat transfer may occur, so that the thermal insulation connector 160 is covered with a heat radiation coating part 170 to block the outflow of heat. Can be.

In addition, a heat shrink sheet 178 may be further provided on an outer side of the heat dissipation coating unit 170 provided to cover the outer tube 140.

The heat shrink sheet 178 may block heat radiated from the heat dissipation coating unit 170, and may protect the heat dissipation coating unit 170 to prevent damage due to exposure of the heat dissipation coating unit 170 to the outside.

Looking at the operation of the expansion joint configured as described above are as follows.

First, the expansion joint device 100 according to an embodiment of the present invention as described above is connected to the insulation double pipe 101 is embedded in the ground or inside the structure. In this case, the expansion joint 100 may be connected to the inner tube 110 and the expansion tube 130 by welding to the inner tube (101a) of the adiabatic double tube (101). In addition, the expansion joint device 100 may be connected to the outer tube 140 by welding to the appearance of the heat insulation double pipe (101).

On the other hand, high temperature fluid such as hot water or steam may be transferred through the adiabatic double pipe 101 in a plant facility such as a cogeneration plant and an energy integrated management facility.

At this time, the inner tube 101a of the adiabatic double tube 101 may be expanded in the longitudinal direction, and thus the expansion tube 130 connected to the inner tube 101a is guided to the packing housing 120 and slides into the inner tube 110. Move.

Meanwhile, the expansion pipe 130 and the packing housing 120 are sealed and contacted by the packing material 124a and the packing so that the high temperature fluid passing through the inner pipe 110 does not leak to the outside.

However, the expansion joint device 100 may be damaged by the packing material 124a sealing the expansion pipe 130 and the packing housing 120, or may not be able to be unloaded due to leakage or the like. When the sliding movement of the 130, the hot fluid passing through the inner tube 110 may leak into the gap between the expansion tube 130 and the packing housing 120.

The leaked fluid is collected in the leaked fluid remaining space (C) formed by the expansion tube 130 and the expansion tube protection chamber 150, the leakage fluid discharge pipe 152 connected to the expansion tube protection chamber 150. Through the outside.

In addition, when the user confirms that the fluid leaks through the leakage fluid discharge pipe 152, the user opens the sleeve cover 146 to the outer tube 140 to open the opening and closing port. Then, the cylinder cap 128 may be opened and the packing material 124a may be injected into the packing cylinder 125.

The packing material 124a may be supplied to the center portion of the packing housing 120 through an injection hole to seal the expansion pipe 130 and the packing housing 120.

On the other hand, the expansion joint device 100 when the high-temperature fluid flows into the expansion tube 130 and the inner tube 110, the heat of the fluid is delivered to the packing housing 120, the expansion through the packing housing 120 The tube is delivered to the chamber 150 for protection.

On the other hand, since the expansion pipe protection chamber 150 is constrained in an insulated state separated from each other through the outer tube 140 and the heat insulating connection portion 160, the heat and expansion pipe 130 of the heat transfer to the packing housing 120 The heat transmitted by the radiation is not transmitted to the outer tube 140.

In more detail, although the expansion pipes 130 and 5 and the inner pipe 110 are heated by the heat of the high-temperature fluid, the heat may be transferred to the expansion pipe protection chamber 150, but the insulation connection unit 160 is provided. In the first support 162 and the second support 164 connected to the expansion tube protection chamber 150 is connected to the outer tube 140 via the heat insulating member 168 is the heat transfer is primarily blocked.

As such, the expansion joint device 100 according to the present invention has heat conduction to the outer tube 140 even when heat is transferred to the expansion tube 130 and the inner tube 110 when the high temperature fluid is transferred through the adiabatic double tube 101. It can block, thereby preventing the enormous waste of energy due to heat loss of the expansion joint device 100 can be improved thermal efficiency and reduce energy costs.

In addition, due to the insulation space formed between the inner tube 110 and the outer tube 140, the heat is transmitted to the outer tube 140 is minimized.

At this time, the heat of the inner tube 110 is not directly transmitted as it is insulated from the outer tube 140, but may be transmitted to the outer tube 140 by radiation or the like.

On the other hand, the heat dissipation coating unit 170 is formed on the surface of the outer tube 140, and secondarily blocks the heat emitted from the outer tube 140. Specifically, the first heat shield coating layer 172, the second heat shield coating layer 174, and the third heat shield coating layer 176 are sequentially stacked on the outer tube 140 to minimize the emission of heat from each coating layer. .

In addition, the present invention is because the heat of the inner tube 110 is not transmitted to the outer tube 140 can prevent the generation of condensed water due to the temperature difference, there is an advantage that corrosion does not occur, thereby improving the durability Since condensate does not flow into the joint or various packing parts, slippage, abnormal wear, corrosion, etc. of the packing may not occur, thereby preventing serious safety accidents such as leakage of steam.

6 is a cross-sectional view of the expansion joint according to another embodiment of the present invention.

Hereinafter, another embodiment will be described with reference to FIG. 6, but the same reference numerals are used to refer to the same or similar elements as those of the above-described embodiment, and detailed descriptions of the same and similar elements and effects will be omitted.

The expansion joint device 200 according to another embodiment of the present invention may be formed in a structure similar to the above-described embodiment, specifically, the inner tube 210, the packing housing 220, the expansion tube 230, the outer It may include a tube 240 and a flexible tube protection chamber 250.

The expansion tube 230, the packing housing 220, and the expansion tube protection chamber 250 may be provided in a symmetrical structure on both sides with the inner tube 210 and the outer tube 240 therebetween.

In the expansion joint 200, the expansion pipe 230 disposed at both sides may be expanded and moved to the inner pipe 210.

The inner tube 210 may be formed larger than the outer diameter of both of the expansion tube 230. The inner pipe 201a of the heat insulation double pipe 201 may be connected to both expansion joints 200 by welding or the like. In addition, the outer tube 240 may be connected to the exterior 201b of the heat insulating double tube 201 by welding or the like.

The expansion joint device 200, the packing housing 220 may be connected to one end of the inner tube (210). The packing housing 220 may be sealedly connected to the expansion tube 230 to seal and guide the expansion and contraction of the expansion tube 230.

In addition, the other end of the packing housing 220 may be the expansion chamber protection chamber 250 is bound by welding or the like.

On the other hand, the other end of the expansion tube protection chamber 250 may be thermally connected via the outer tube 240 and the heat insulating connection.

In detail, the heat insulation connection part 260 may include a first support part 262 extending from the outer tube 240 in the direction of the inner tube 210 and a first support part 262 at one end of the expansion tube protection chamber 250. A second support portion 264 correspondingly extending, a fastening member 266 which binds the first support portion 262 and the second support portion 264, and between the first support portion 262 and the second support portion 264. It may include a heat insulating member 268 interposed therein.

As the expansion tube protection chamber 250 is connected to the outer tube 240 by the heat insulating connector 260, the heat transmitted or radiated from the expansion tube 230 and the inner tube 210 is second support portion 264. Although transmitted to, but transmitted to the first support portion 262 by the heat insulating member 268 may be blocked.

On the other hand, the expansion pipe protection chamber 250 of the present embodiment is a leakage fluid remaining space (C) formed between the expansion pipe protection chamber 250 and the expansion pipe 230 corresponding to both sides around the inner tube 210 ) May be formed.

In addition, a leakage fluid discharge pipe 252 for discharging leakage fluid remaining in the leakage fluid remaining space C to the outside may be connected to one side of the expansion tube protection chamber 250 to check whether the packing housing 220 leaks. .

In the present embodiment, the leaked fluid discharge pipe 252 connected to the leaked fluid remaining space C may be connected to each other and communicated with each other to extend to the outside.

In addition, the expansion joint device 200 of the present embodiment may further include a heat dissipation coating unit 270 surrounding the outer circumference of the outer tube 240 to prevent heat damage from the outer circumference of the appearance.

The heat dissipation coating part 270 is coated on the outer surface of the outer tube 240, and the first heat shield coating layer 272 and the first heat shield coating layer 272 to serve as a heat shield and rust preventive heat-resistant The second heat shield coating layer 274 and the second heat shield coating layer 274 may include a third heat shield coating layer 276 laminated and thermally coated.

The first heat shield coating layer 272 may be coated on the outer surface of the outer tube 240 to block heat insect insects of the outer tube 240. In addition, the first heat shield coating layer 272 may have an antirust function to remove corrosion of the outer tube 240 surface.

Although the heat dissipation coating unit 270 is described as being coated on the outside of the outer tube 240 in the present embodiment, it is also possible to further coat the inside of the outer tube 240 or the outside of the inner tube 210.

As mentioned above, although this invention was demonstrated, those of ordinary skill in the art should add, change, delete, or add a component within the range which does not deviate from the idea of this invention described in the claim, and this invention. Will be able to variously modify and change, which will also be included within the scope of the invention.

100: expansion joint 101: heat insulation double pipe
110: inner tube 112: insulation
120: packing housing 122: housing body
124: packing groove 124a: packing material
124b: packing ring 125: packing cylinder
130: new building 132: guide home
140: outer tube 150: expansion tube protective chamber
152: leakage fluid discharge pipe 160: insulated connection
162: first support portion 164: second support portion
166: fastening member 168: heat insulating member
170: heat dissipation coating portion 172: first heat shield coating layer
174: second heat shield coating layer 176: third heat shield coating layer

Claims (5)

An inner tube through which fluid flows;
An expansion pipe that is elastically moved inwardly of the inner pipe;
A packing housing connected to at least one end of the inner tube to seal the expansion tube and supporting movement of the expansion tube;
An outer tube spaced apart from the inner tube and the outside of the packing housing; And
And an expansion pipe protection chamber provided to cover the outside of the expansion pipe by being insulated from one end of the packing housing.
The expansion tube protection chamber,
One end is connected to the end of the packing housing by welding so as to be connected to the same outer diameter of the packing housing, the other end is insulated and connected to the outer tube by a heat insulating connector,
A leaking fluid remaining space is formed between the expansion pipe and the leaked fluid from the inner pipe, and the leaked fluid discharge pipe for discharging the leaked fluid from the leaked fluid remaining space to the outside is drawn outward.
Covering for blocking the outer periphery of the guide groove is formed stepped in the portion sliding the sliding movement by the expansion and contraction on the outer circumferential surface of the expansion pipe extending in the longitudinal direction from the end to form a free end Expansion joint is provided. The method according to claim 1,
The thermally connected portion,
A first support portion extending from the outer tube toward the inner tube;
A second support portion extending corresponding to the first support portion at one end of the flexible tube protection chamber;
A fastening member for coupling the first support portion and the second support portion; And
An insulating member interposed between the first support part and the second support part;
Including, expansion joint device. The method according to claim 2,
The first support and the second support,
Through-holes corresponding to each other are formed,
The heat insulating member,
A communication hole communicating with the through hole is formed between the first support part and the second support part.
The fastening member,
A fixing bolt inserted into and fastened to the through hole and the communication hole;
The fixing bolt,
The expansion joint device is formed of a heat insulating material to block heat transfer between the first support and the second support, or a washer of a heat insulating material is inserted into the binding portion between the first support and the second support. The method according to any one of claims 1 to 3,
Further comprising a heat dissipation coating provided on the outer circumferential surface of the outer tube and the heat insulation connecting portion,
The heat dissipation coating unit,
A first heat shield coating layer coated on an outer circumferential surface of the outer tube to block and prevent heat release;
A second heat shield coating layer laminated on the first heat shield coating layer to block heat release; And
And a third heat shield coating layer laminated on the second heat shield coating layer to block heat release.
The first heat shield coating layer,
Operating temperature is -60 ℃ to 250 ℃, coated to a thickness within 0.5mm,
The second heat shield coating layer,
Operating temperature is -60 ℃ to 220 ℃, coated with a thickness of 0.5mm to 1.5mm,
The third heat shield coating layer,
The use temperature is -60 ℃ to 120 ℃, coated with a thickness of 1mm to 2mm, expansion joint device. The method according to claim 4,
The heat dissipation coating unit,
Expansion joint device further comprises a heat shrink sheet provided to the outside.

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