KR100917144B1 - Expension joint device for using steel in steel pipe - Google Patents

Abstract

An expansion joint of a heat insulating duplication pipe is provided to discharge leakage fluid in the expansion joint directly to outside though drain of leakage fluid and a vacuum check outlet. An expansion joint of a heat insulating duplication pipe comprises a first packing space(144), a second packing space(145), a leakage fluid drain and vacuum check port(150). The first packing space is formed in an inner contact surface of a stuffing box(122) in which a packing cylinder is installed. The first packing space blocks the leakage fluid. The second packing space is formed in the inner contact surface of the stuffing box. The second packing space blocks that leakage fluid is infiltrated between a jacket pipe(100) and a central pipe. The leakage fluid drain and vacuum check outlet is formed between the first and the second packing spaces. The leakage fluid drain and vacuum check outlet has a groove portion(153). The groove portion is formed at the inner contact surface of the stuffing box.

Description

Extension joint device for using steel in steel pipe}

The present invention relates to a stretch joint device of a double-insulated double pipe, in particular a central pipe (hereinafter referred to as a central pipe as a pipe for fluid transport) and a jacket pipe (jacket pipe, the foreskin pipe to protect the outside of the center pipe) The center tube is extended by expanding one end of the center tube in an insulating double tube (hereinafter referred to as a jacket tube) (an overlapping tube that forms a heat insulating space between the center tube and the jacket tube and allows vacuum or insulation). The leakage fluid discharged and the vacuum between the joint pipe formed to be inserted and the expansion fluid of the central pipe that is stretched and moved by inserting and moving the inner end of the joint pipe, which is connected to the joint pipe, and installed in the packing space inside the center pipe. It relates to a stretch joint device of a double insulation pipe to be discharged to the outside of the jacket pipe through the sphere.

In general, the double-insulated double tube with the expansion joint device has a thermal insulation space on the outer side of the central pipe for transporting fluids such as water, gas, oil, steam, etc., which are buried in the ground.

The expansion joint device has a expansion and contraction occurs in the joint pipe connected to the center tube and the center tube inserted in the joint pipe in order to compensate for the amount of expansion due to the linear expansion of the pipe due to the temperature difference of the fluid.

When such stretching occurs, various packing means are devised so that no leakage of fluid occurs between the center tube and the joint tube.

On the other hand, a heat insulation double tube having a stretch joint device for increasing the heat insulation effect by applying a vacuum of a predetermined pressure to the heat insulating space in addition to the heat insulating material has also been proposed.

Stretch joint device implemented in such a double insulation tube has been proposed by the applicant as shown in Figure 1 attached. It consists of a flexible joint device which is installed by extending the joint pipe to the center tube to form a thermal insulation space between the center tube and the jacket tube so as to correspond to the expansion joint of the center tube in a heat insulating material or insulated structure with vacuum insulation. .

That is, the cylindrical jacket tube 100, the center tube 110 is installed at a predetermined interval inside the jacket tube 100, and the expansion tube 150 connected to one end of the center tube 110 And, it consists of a packing cylinder 140 is installed while circumventing at a predetermined position of the center tube 110, the clamping inside the jacket tube 100 in order to maintain the gap between the center tube 110 and the jacket tube 100 The member is installed, and the clamping member is fastened as a fastening member in a state in which a heat transfer blocking gasket is interposed, and the jacket pipe 100 includes a fluid leakage check port extending from the center pipe 110 and a packing cylinder 140. It is by forming a cap and an inlet for injecting the powder packing.

In the expansion joint device of the buried insulation double pipe, the expansion and contraction action is caused by the expansion and contraction of the joint pipe connected to the center pipe and the center pipe inserted in the pipe to compensate for the amount of expansion due to the linear expansion of the pipe due to the temperature difference of the fluid. Happens.

In this expansion and contraction, fluid flowing through the center tube is leaked, and various blocking means are installed between the center tube and the joint tube to prevent this from happening.

In addition, a method of increasing the thermal insulation effect by applying a vacuum at a predetermined pressure in addition to the thermal insulation material for thermal insulation of the thermal insulation double tube including the stretched portion is proposed.

However, the expansion joint device of the double insulation pipe is made of bellows and joints according to the structure of the leakage fluid discharged into the warming space due to the accessories such as packing member for blocking the leakage fluid, bellows, outlet for discharging the leakage fluid, etc. It is made of a complicated structure, and in particular, the bellows connection part is welded due to corrosion of the welding part between the dissimilar materials (sus and carbon material), which causes leakage, and when the amount of expansion is increased due to these causes, the welded part becomes larger. There is also a problem that the construction of the expansion joint device, manufacturing is reduced, so that the post-management is not possible due to defects.

Therefore, not only does the vacuum in the thermal insulation space leak, but also the expansion joint device, the leakage fluid discharge, and the vacuum confirmation structure that simplify the structure of the expansion joint device have been required.

It is an object of the present invention to provide a double-stranded expansion joint device for adiabatic double pipe that the leakage fluid generated when the fluid transfer center tube is stretched in the joint pipe is immediately discharged between the packing means.

An object of the present invention is to provide a stretch joint device for a double-insulated double tube that can check the vacuum state of the thermal insulation space as well as preventing fluid leakage into the thermal insulation space of the composite joint insulated expansion joint device as a vacuum and insulation. .

It is an object of the present invention to provide a flexible joint device for an insulation double pipe that can form a complex packing space in which a leaking fluid is formed, and that the packing space can be repaired.

It is an object of the present invention to provide an expansion joint device for a double-insulated double pipe in which the injection of packing material by a packing cylinder to block leakage fluid is distributed and supplied by a branch pipe.

It is an object of the present invention to provide a telescopic joint device in which a space in which a packing cylinder is located is communicated to the outside by distinguishing a space from a thermal insulation space.

It is an object of the present invention to provide a flexible joint device in which a packing means for blocking a leakage fluid is a packing cylinder and insert packing.

According to the present invention, a flexible joint apparatus for a double-insulated double pipe which allows the leaked fluid to be discharged from the outside of the jacket pipe by communicating the leaked fluid discharge and the vacuum check port formed symmetrically on both sides and checks the vacuum state. The purpose is to provide.

The present invention simplifies the attachment and structure of the expansion joint device, especially the expansion joint device in which the leakage fluid generated in the expansion joint device is discharged to the outside through the discharge means, and also welds between the release materials (sus and carbon material). Welded parts are reduced even when the joint pipe is enlarged due to the increase in the amount of expansion due to the improvement of corrosion, etc., which improves the workability and manufacturing of the expansion joint device, and uses the leaked fluid discharge and vacuum checking structure that enables the post-management of defects. The ultimate goal is to provide a telescopic joint device.

Stretch joint device of the present invention for achieving the above object,

A central tube through which the fluid is transferred, a joint tube extending on the other side with a diameter larger than the central tube at one end of the central tube, and the other end of the central tube is inserted into the joint tube to be slidable; Insulation double pipe is formed by a jacket pipe that surrounds the outside of the central pipe with a predetermined space,

A first and a second packing space for blocking the leakage of fluid generated by the slide movement of the center pipe on the inner surface of the pipe is formed, wherein at least one packing cylinder for injecting at least one packing material is formed in the first packing space, It is achieved as a flexible joint device for installing the leaked fluid discharge and vacuum check port between the packing cylinders to discharge the leaked fluid between the packing cylinders during the slide movement of the center tube.

In order to achieve the above object, the first and second packing spaces of the present invention have a groove part formed along the inner circumferential surface of the joint pipe between the first and second packing spaces, and the leakage fluid discharge and vacuum check holes are preferably provided in the groove part. Do.

In order to achieve the above object, the present invention provides a flexible joint device, in which a branch pipe is connected between the first and second packing spaces to simultaneously inject a packing material.

In order to achieve the above object, the present invention provides a flexible joint device in which the inlet body is vertically installed with the packing cylinder at the center to form an independent space separated from the insulating pipe between the jacket pipe and the fitting pipe, and is opened and closed by the inlet cover at the jacket pipe side. It is preferable to further include an injection port to make.

In order to achieve the above object, the present invention may include a clamping member configured to connect the joint pipe to the jacket tube so that the joint pipe and the fluid leakage outlet are opposite to each other.

It is preferable that at least one packing cylinder of the stretch joint device of the present invention for achieving the above object is installed.

In order to achieve the above object, the branch pipe of the flexible joint device of the present invention is preferably formed along the inner circumferential surface of the joint pipe.

In accordance with an aspect of the present invention, there is provided a flexible joint device for connecting a leakage fluid discharge and a vacuum check port on both sides of the clamping member by a communication line.

According to the present invention, the expansion joint device simplifies the discharging structure for discharging the leaking fluid, and the structure is simpler than the structure for discharging the leaking fluid using the accessory means such as the bellows, and the problems such as damage to the welded part are improved. It is advantageous to follow-up care, and thus the workability is improved.

The expansion joint apparatus having the leaked fluid discharge and vacuum checking structure of the present invention has the effect that such leaked fluid is directly discharged outward from the expansion joint device.

The stretch joint device of the present invention has the effect of simplifying the construction by omitting the accessory equipment such as bellows formed in the heat insulating space between the center pipe and the jacket pipe, unlike the stretch joint device of the conventional stretch joint device.

The present invention is to form a packing space for the leakage fluid is collected and to block the vacuum, as well as to repair the first packing space for blocking the fluid and the second packing space for blocking the vacuum of the steel in steel (heat insulation double pipe) It provides a flexible joint device and prevents leakage fluid from penetrating the insulating space by the primary packing means, and discharges the leakage fluid when the leakage fluid is discharged through the leakage fluid discharge and vacuum check ports. It is possible to check the vacuum state of the insulating space during vacuum suction through the drainage and confirmation port of the leaked fluid, and to provide the expansion joint device of the insulation double pipe which can be repaired without affecting the vacuum even if the packing is put in during maintenance. It is.

The present invention improves the construction of the expansion joint device, fabrication of the expansion joint device is improved by improving the problems such as corrosion of the weld between the release material (sus and carbon material) by the increase in the amount of expansion and expansion of the joint joint device, and follow-up management Has the effect enabled.

Referring to the accompanying drawings, preferred embodiments of the present invention will be described.

As shown in FIG. 1, a general heat insulation double pipe is formed of a center pipe 110 and a jacket pipe 100, and forms a heat insulating space therebetween, and is filled with a heat insulating material (heat insulating material). Such a heat insulation double tube is preferably carried out by adding a vacuum of a predetermined pressure only with a heat insulating material or a state filled with the heat insulating material.

Insulating double pipe having a telescopic joint device of the present invention is constructed independently or in combination with various piping facilities in addition to the telescopic joint device to block the leakage fluid during the expansion and movement of the central pipe, the blocked fluid to be discharged to the outside or outside the jacket pipe It is done.

2 is a cross-sectional view of the first embodiment of the expansion joint device of the heat insulation double pipe of the present invention,

Stretch joint device of the present invention according to the drawings is largely jacket pipe 100, the center pipe 110, the fitting pipe 120, the packing portion 140, the leakage fluid discharge and vacuum confirmation port 150 The packing unit 140 is divided into one packing cylinder 141 and the insert packing 148.

According to the present invention, the flexible joint device according to the present invention includes a center pipe 110 through which fluid is transferred, and a joint pipe 120 extending to the other side with a diameter larger than the center pipe 110 at one end of the center pipe 110. And, the other end of the center tube 110 is inserted into the fitting pipe 120 to be slidable, from the outside to the jacket pipe 100 surrounding the outside of the center pipe 110 with a predetermined space It forms an adiabatic double tube.

The present invention heat insulation double pipe is a packing cylinder 141 and the injection hole on the side of the jacket tube 100, the packing material 143 is injected in response to the expansion and contraction of the center tube 110 on one side end outer peripheral surface of the center tube 110 A packing part 140 formed of 142 may be formed, and a leaking fluid discharge and a vacuum check hole 150 may be formed through the jacket pipe 100 so as to communicate with the fitting pipe 120.

The packing part 140 and the leaking fluid discharge and vacuum checking port 150 are installed in the stuffing box 122 extending as part of the joint pipe 120, and the stuffing box 122 is the leaking fluid discharge and vacuum. A check hole 150 is formed to communicate with the discharge hole 152 is installed, the bottom of the discharge hole 152 is in communication with the discharge hole 152 and the leakage fluid is collected around the bottom of the stuffing box 122 The groove 153 is formed.

The packing cylinder 141 is formed on the stuffing 122 side directly below the injection hole 142 of the packing part 140, but is isolated as the injection hole 142.

At the bottom of the stuffing box 122, a first packing space 144 communicating with the packing cylinder 141 and a second packing space 145 into which the insert packing 148 is inserted are formed.

A discharge hole 152 is formed between the packing cylinder 141 and the insert packing 148, and a leakage fluid discharge and vacuum check hole 150 is provided on the discharge hole 152. The leakage fluid discharge and vacuum check port 150 is installed through the jacket tube 100 outside the discharge hole 152.

In addition, the packing cylinder 141 has a cylinder body 141b which is opened and closed as an opening and closing hole 141a on the stuffing box 122, and a bottom thereof communicates with the first packing space 144 to seal the packing material 143. Will be filled.

The injection hole 142 forms an injection hole body 142c from the jacket pipe 100 side to the fitting pipe 120 side and surrounds the packing cylinder 141 in an isolated space with the injection hole cover 142a in the center. It is to be opened and closed as the bolting member 142b. That is, it is to be isolated from the insulating space formed between the jacket tube 100 and the central tube 110 to be independent of the vacuum that can be applied to the insulating space.

In the present invention, the expansion joint device is in contact with the outer circumferential surface of the center tube 110 and the inner circumferential surface of the joint pipe 120 when the central pipe 110 is moved in and out of the joint pipe 120.

At this time, since the fluid being transported in the center tube 110 leaks to the slide contact surface, the packing material 143 supplied to the first and second packing spaces 144 and 145 of the packing unit 140 is described above. It will block this. Injection of the packing material 143 is injected through the packing cylinder 141 at the injection hole 142.

Secondary packing means may be further formed on both sides of the packing material 143 to prevent the packing material 143 from being pushed out.

In this way, the leakage fluid during the slide movement of the center tube 110 is blocked as the packing material 143, but leakage of fine fluid occurs due to deterioration of the packing material 143 which is in use for a long time.

When leakage of fluid occurs, it is collected in the groove portion 153 formed on the inner circumferential surface of the fitting pipe 120 as described above, and the collected leakage fluid is discharged in the discharge hole 152 bored in any one of the groove portion 153 ( It is pushed up through 150, thereby alerting or displaying the leakage of fluid through various detection means installed on the ground outside the jacket pipe (100).

The drainage principle of the leaked fluid is simpler in discharging structure than the expansion and contraction device configured as the discharge port at the collecting space through the bellows of FIG. 1 as described above, and the discharge of the leaked fluid can be quickly known. The constructability in the field is improved.

3 is a cross-sectional view of a second embodiment of the expansion joint device of the present invention double insulation pipe,

Stretch joint device according to the present invention has a difference in diameter so that the diameter of one center tube 110 is slide-connected to the other center tube 110 so that the joint pipe 120 stretches the two center tube 110 Connected.

The packing unit 140 blocks a leakage of fluid in response to the expansion and contraction of the center tube 110 on the outer circumferential surface of one side end of the center tube 110, and a plurality of packing cylinders 141 into which the packing material 143 is injected. ) And an injection hole 142 toward the jacket tube 100 so as to be isolated from the heat insulating space (the space between the jacket tube and the center tube).

The leaked fluid discharge and the vacuum check hole 150 is installed in the fitting pipe 120 through the jacket pipe 100 so that the leakage fluid between the fitting pipe 120 and the center pipe 110 is formed in the groove 153. If the water is collected along the discharge hole 152 is installed to drain to the outside of the jacket pipe (100).

The packing part 140 and the leakage fluid discharge and vacuum check port 150 are preferably installed in the stuffing box 122 extending one end of the joint pipe 120.

The packing part 140 forms an injection hole 142 from the jacket tube 100 side to the stuffing box 122 to form an isolation space, and the packing cylinders 141 are positioned in the isolation space.

Particularly, at least one packing cylinder 141 of the flexible joint apparatus of the present invention is installed. Preferably, the packing cylinders 141 are installed in each of the first and second packing spaces 144 and 145, and the first and second packing cylinders 141 are installed. It is preferable that the leakage fluid discharge and vacuum check holes 150 are installed on the groove portion 153 and the discharge hole 152 formed between the second packing spaces 144 and 145.

In addition, the packing cylinder 141 has a cylinder body 141b which is opened and closed as an opening and closing hole 141a on the stuffing box 122, and the first and second packing spaces 144 and 145 are provided at the bottom thereof. Forming the packing material 143 is filled, the inlet 142 is formed in the inlet body 142c from the jacket pipe 100 side to the joint pipe 120 side to the packing cylinder 141 is an independent space It is enclosed, it is to be opened and closed as the injection port cover (142a). Reference numeral 142b is a bolting member.

In the present invention, the flexible joint apparatus of the present embodiment prevents fluid leakage from the center tube side as the plurality of packing cylinders 141 to prevent the fluid from leaking into the insulating space between the jacket tube 100 and the center tube 110. Leakage fluid that is not blocked through these packing means is characterized in that the discharge through the outlet (150).

 Stretch joint device of the heat insulation double pipe of the present invention is composed of a center pipe 110 and the jacket pipe 100, forming a heat insulating space therebetween, the heat insulating material (heat insulating material) is filled. The present invention is preferably carried out with only a heat insulating material or by adding a vacuum of a predetermined pressure in a state in which the heat insulating material is filled.

4 is a longitudinal cross-sectional view of the center tube of the first and second embodiments of the flexible joint device of the heat insulation double pipe according to the present invention in which the packing cylinders 141 are located inside the injection hole 142.

5 is a cross-sectional view of a third embodiment of the expansion joint device of the double-insulation tube of the present invention, Figure 6 is a cross-sectional view of a third embodiment of the expansion joint device of the insulation double tube of the present invention.

The third embodiment of the stretch joint device according to the present invention shown in the drawings is substantially the same as the above-described embodiments, but the branch pipe 149 of the packing 140 is connected by a separate pipe outside the joint pipe 120. There is.

That is, the heat insulation double pipe of the present embodiment is composed of a center pipe 110 and the jacket pipe 100, forming a heat insulating space therebetween, the heat insulating material (heat insulating material) is filled, the vacuum of a predetermined pressure in the state filled with the heat insulating material It is carried out by adding.

The expansion joint device is made of a center pipe 110, a fitting pipe 120, a packing portion 140, the leakage fluid discharge and vacuum check hole 150, as in the above-described embodiments, 120 is formed to extend in the other center tube 110 with a diameter larger than the center tube 110, the leakage fluid discharge and vacuum check port 150 penetrates through the jacket tube 100 in the joint pipe 120 It is installed in the drain hole 152 formed in the groove portion 153 formed in a ring shape around the bottom surface, the packing portion 140 and the leakage fluid discharge and vacuum confirmation port 150 is stuffing extending one end of the pipe 120 It is installed in the box 122.

The packing unit 140 is installed at the fitting pipe 120 side as in the above-described embodiments, and includes one packing cylinder 141 and an injection hole 142, and the first packing space of the packing cylinder 141 ( 144 to form a second packing space 145, between the first and second packing spaces (144, 145) to project into the joint pipe 120 or to the outer peripheral surface of the joint pipe 120, or (120) Branch pipes 149 may be formed by pipes floating on the outer circumferential surface.

That is, when the packing material 143 is injected through one packing cylinder 141, the packing material 143 is injected into the first packing space 144 and the second packing space 145 is taken through the branch pipe 149. The packing material 143 is injected at the same time.

The packing cylinder 141 is provided with a cylinder body 141b which is opened and closed as an opening and closing hole 141a on the stuffing box 122, and the first packing space 144 is positioned at the bottom of the packing material 143. This is done by filling.

The injection hole 142 vertically installs the injection hole body 142c centering the packing cylinder 141 to form an independent space separated from the insulating space between the jacket pipe 100 and the fitting pipe 120, and the jacket It is to be opened and closed by the inlet cover (142a) on the tube 100 side.

According to the present invention, the expansion joint apparatus of the present embodiment allows the fluid leakage of the central observation to be discharged through the leaking fluid discharge and the vacuum check port 150 through the leaking fluid that is blocked by the packing material of the packing cylinder but not blocked through the packing material. It is possible to check for leaks and follow up such as packing material injection.

7 is a cross-sectional view of a fourth embodiment of the expansion joint device of the heat insulation double pipe of the present invention.

According to the present invention, the flexible joint device shown in the drawings, the packing unit 140 having the branch pipe 149 of the above-described embodiment, as well as the leakage fluid discharge and the vacuum check hole 150, etc. are mainly centered on the clamping member 130. Symmetrical on both sides.

That is, the expansion joint device of the present embodiment also consists of the center tube 110 and the jacket tube 100, forming a heat insulating space therebetween, and extends to the other center tube 110 with a diameter larger than the center tube 110. Formed joint pipe 120, the above-mentioned packing portion 140, and the leakage fluid discharge and vacuum confirmation port 150, but the clamping member 130 is called a double-stretch expansion joint installed on both sides centering Indicates.

As described above, the packing part 140 includes one packing cylinder 141 and an injection hole 142, and forms a second packing space 145 in addition to the first packing space 144 of the packing cylinder 141. In the meantime, the branch pipes 149 may be formed by the pipes protruding into the outer pipe 120 or the outer circumferential surface of the pipe 120 or floating on the outer circumferential surface of the pipe 120.

The leakage fluid discharge and vacuum check port 150 may be installed in the drain hole 152 formed in the groove 153 formed in a ring shape by passing through the jacket pipe 100 and circumferring the inner bottom surface of the joint pipe 120.

In particular, the packing part 140 is provided with a cylinder body 141b which opens and closes as an opening and closing hole 141a on the stuffing box 122, and a first packing space 144 is formed at the bottom of the packing material 143. ) Is filled, the inlet 142 is the inlet body 142c centering the packing cylinder 141 to form an independent space isolated from the insulating space between the jacket pipe 100 and the fitting pipe 120 Is installed vertically, and opened and closed by the inlet cover 142a on the jacket tube 100 side.

8 is a cross-sectional view of a fifth embodiment of the expansion joint device of the heat insulation double pipe of the present invention.

The fifth embodiment of the expansion joint device of the heat insulation double pipe of the present invention is largely the jacket pipe 100, the center pipe 110, the joint pipe 120, the clamping member 130, the packing portion 140, The leakage fluid discharge and the vacuum check port 150 is divided.

Similar to the above-described embodiments, the double insulation tube implementing the stretch joint device according to the present invention has a central tube 110 through which fluid is transferred, and a diameter larger than that of the center tube 110 at one end of the central tube 110. The other end of the center tube 110 is inserted into the joint pipe 120 and the joint pipe 120 is formed to be slidable, and the outside of the center pipe 110 from the outside to a predetermined space Surrounding the jacket pipe 100 to form a heat insulation double pipe.

In addition, as described above, the stuffing box 122 as described above through the fitting pipe 120, the packing cylinder 141, the inlet 142, and the leakage fluid discharge and vacuum check port 150 of the packing 140. After installing the one side is connected to the central tube (110). In this state, the other side center tube 110 is connected to the one side center tube 110 so as to expand and contract. The packing part 140 and the leaking fluid discharge and vacuum checking port 150 are installed in the stuffing box 122 extending one end of the fitting pipe 120.

The packing part 140 blocks the fluid leakage of the center pipe 110 between the fitting pipe 120 and the center pipe 110 slide-connected thereto and at the same time prevents the fluid from leaking to the heat insulating space. 100) and the fitting pipe 120 is installed on the side.

The packing unit 140 blocks a leakage of fluid in response to the expansion and contraction of the center tube 110 on the outer circumferential surface of one side end of the center tube 110, and a plurality of packing cylinders 141 into which the packing material 143 is injected. ), And the injection hole 142 is formed in the jacket pipe 100 side, and the drain hole 152 and the long groove 153 as described above are formed between the plurality of packing cylinders 141, and onto the drain hole 152. A leaking fluid discharge and vacuum check port 150 is provided.

In addition, the packing cylinder 141 is provided with a cylinder body 141b which is opened and closed as an opening and closing hole 141a on the stuffing box 122, and a first packing space 144 is formed at the bottom of the packing material 143 ) Is filled. The injection hole 142 forms an injection hole body 142c over the fitting pipe 120 and the jacket pipe 100 so as to be isolated from the thermal insulation space with the packing cylinder 141 on the fitting pipe 120 side at the center, and a bolting member. Opening and closing of the injection port cover 142a by 142b.

The clamping member 130 is installed between the jacket tube 100 and the center tube 110 to maintain the gap between the center tube 110 and the jacket tube 100, as shown in Figure 1 The same implementation as in the prior art.

That is, a circular center clamping member is formed on the inner circumferential surface of the jacket pipe 100, and the center pipe 110 forms two clamping members on the outer circumferential surface of the center clamping member, and a gasket for heat transfer blocking is provided. It is connected by fastening as a fastening member.

As a result, the aforementioned packing part 140 and the leakage fluid discharge and vacuum check holes 150 are opposed to each other with the clamping member 130 interposed therebetween to form a double expansion joint device.

Leakage fluid discharge and vacuum check hole 150 is installed in the fitting pipe 120 through the jacket pipe 100 is leaking fluid generated when the expansion and contraction with the fitting pipe 120 in the central pipe 110 is long groove It is collected along 153 and is installed to be drained to the outside of the jacket pipe 100 through the drain hole 152.

In the stretch joint device of the present invention of the present embodiment, the fluid leakage of the center tube side is blocked by a plurality of packing cylinders, but the leaked fluid that is not blocked through the packing means on the center tube 110 side is discharged through the drain hole 150.

9 is a cross-sectional view of the sixth embodiment of the expansion joint device of the heat insulation double pipe of the present invention.

The thermal insulation double pipe to which the present invention joint joint device according to the drawing is applied consists of a central pipe 110 and a jacket pipe 100, and forms a thermal insulation space therebetween, and is filled with a heat insulating material (insulating material). The present invention is preferably carried out with only a heat insulating material or by adding a vacuum of a predetermined pressure in a state in which the heat insulating material is filled.

A sixth embodiment of the present invention, the expansion joint device according to the drawing is the jacket pipe 100, the center pipe 110, the joint pipe 120, the packing portion 140, the leakage fluid discharge and vacuum check opening It is divided into 150, the packing unit 140 is made of a packing cylinder 141, and the injection hole 142, the first and second packing spaces 144, 145 of the second packing space 145 Insert packing 148 may be formed.

According to the present invention, the expansion joint device of the present invention forms a joint pipe 120 connected to one center pipe 110 so as to slide-connect to the other center pipe 110 so that two center pipes 110 are telescopically moved. Packing cylinder 141 and the injection hole on the jacket tube 100 side to block the leakage of the fluid in response to the expansion and contraction movement of the central tube 110 on one side end outer peripheral surface of the 110 and the packing material 143 is injected ( It consists of a packing unit 140 made of 142, and through the jacket pipe 100 to form a leakage fluid discharge and vacuum check port 150 to communicate with the pipe 120.

The packing part 140 and the leaking fluid discharge and vacuum check port 150 are installed in the stuffing box 122 extending one end of the joint pipe 120, and the stuffing box 122 is the leaking fluid discharge and vacuum. A check hole 150 is formed in communication with the drain hole 152 is installed, the bottom of the drain hole 152 is in communication with the drain hole 152, the long groove in which the leakage fluid is collected by circumference at the bottom of the stuffing box 122 ( 153).

The packing part 140 may have an injection hole 142 formed on the jacket tube 100 side, and a packing cylinder 141 may be formed on the stuffing 122 side directly below the injection hole 142. In particular, the packing part 140 is formed of one packing cylinder 141 and forms a second packing space 145 into which an insert packing 148 is inserted at a bottom of one side of the stuffing box 122.

A drain hole 152 is formed between the packing cylinder 141 and the insert packing 148, and a leakage fluid discharge and vacuum check hole 150 is provided on the drain hole 152.

In addition, the packing cylinder 141 is provided with a cylinder body 141b which is opened and closed as an opening and closing hole 141a on the stuffing box 122, and a first packing space 144 is formed at the bottom of the packing material 143 ) Is filled. The injection hole 142 forms an injection hole body 142c over the fitting pipe 120 and the jacket pipe 100 so as to be isolated from the thermal insulation space with the packing cylinder 141 on the fitting pipe 120 side at the center, and a bolting member. Opening and closing of the injection port cover 142a by 142b.

The clamping member 130 is formed between the jacket tube 100 and the center tube 110 to maintain the gap between the center tube 110 and the jacket tube 100.

That is, a circular center clamping member is formed on the inner circumferential surface of the jacket pipe 100, and the center pipe 110 forms two clamping members on the outer circumferential surface of the center clamping member, and a gasket for heat transfer blocking is provided. It is connected by fastening as a fastening member.

As a result, the aforementioned packing part 140 and the leakage fluid discharge and vacuum check holes 150 are opposed to each other with the clamping member 130 interposed therebetween to form a double expansion joint device.

Leakage fluid discharge and vacuum check hole 150 is installed in the fitting pipe 120 through the jacket pipe 100 is leaking fluid generated when the expansion and contraction with the fitting pipe 120 in the central pipe 110 is long groove It is collected along 153 and is installed to be drained to the outside of the jacket pipe 100 through the drain hole 152.

In the present invention, the flexible joint device of the present embodiment is the fluid leakage of the center tube side is blocked by the packing cylinder and the insert packing, but the leaked fluid that is not blocked through the packing means on the center tube 110 side is discharged through the drain 150. .

In the expansion joint device of the above embodiments, the leakage fluid is discharged to the jacket tube side at both sides of the clamping member 130.

10 is a cross-sectional view of the seventh embodiment of the expansion joint device of the heat insulation double pipe of the present invention.

The drawings are drawings showing the preferred embodiment of the present invention, and various embodiments can be made with other drawings.

The inventive joint joint device according to the drawings is largely the joint pipe 120, the clamping member 130, the packing member 147, the leakage fluid discharge and vacuum check hole 150 and the communication line 154 Is done.

The joint pipe 120 is formed to extend in the other center pipe 110 with a larger diameter than the center pipe (110).

The packing unit 140 blocks the fluid leakage of the center tube 110 between the joint pipe 120 and the center tube 110 slide-connected to the joint pipe 120 so that the fluid does not leak to the side of the insulating space ( 120) is installed on the side.

The clamping member 130 is inserted in the clamping member between the jacket tube 100 and the center tube 110, as shown and described in the conventional heat insulating double tube as described above to interpose a gasket therebetween and fastening holes It is a fixing means of the jacket tube 100 and the center tube 110 for fastening and fastening with a fastening member (specific reference numerals and description of the configuration is omitted).

The leaked fluid discharge and the vacuum check port 150 passes through the jacket pipe 100 and communicates with the joint pipe 120 to discharge the leaked fluid during the slide connection movement between the joint pipe 120 and the center pipe 110. Is installed.

In this embodiment, the communication line 154 is formed in communication with the drain port 150 on both sides of the clamping member 130 to discharge the leaked fluid as one leaked fluid and the vacuum check port 150.

In this embodiment, the flexible joint device of the present invention not only blocks the fluid leakage on the center tube 110 side but also blocks the fluid leakage to the heat insulating space, and the leakage of the fluid generated from the center tube 110 side is a plurality of. Along with the communication line 154 installed in the drain hole 152 has a feature that is discharged as one leakage fluid and vacuum check port 150.

Leakage fluid drainage principle consisting of the communication line 154 can be applied to all the various packing portion 140 described above, the specific application thereof is omitted.

In the present invention, the expansion joint device of the insulated double pipe is in contact with the outer circumferential surface of the center pipe 110 and the inner circumferential surface of the joint pipe 120 when the central pipe 110 is moved in and out of the joint pipe 120.

At this time, the fluid being transported in the center tube 110 is leaked to the slide contact surface, and then it is supplied to the packing space 144 and 145 through the packing cylinder 141 through the injection hole 142 of the packing unit 140 described above. The packing material 143 is blocked.

Secondary packing means are further formed on both sides of the packing material 143 to prevent the packing material 143 from being pushed out.

In this way, the leakage fluid during the slide movement of the center tube 110 is blocked as the packing material 143, but leakage of fine fluid occurs due to deterioration of the packing material 143 which is in use for a long time.

When leakage of the fluid occurs, it is collected in the long groove 153 formed on the inner circumferential surface of the fitting pipe 120 as described above, and the collected leaked fluid is installed in the drain hole 152 drilled in any one of the long grooves 153. It will be pushed up through), thereby alerting or displaying through various detection means installed on the ground outside the jacket pipe (100).

The drainage principle of the leaked fluid is simpler in structure than the expansion joint device which constitutes the drainage port in the collecting space through the bellows of FIG. 1, and the discharge of the leaked fluid can be quickly known. The constructability at is improved.

The double expansion and contraction joint device of the above embodiments prevents the fluid leakage of the central observation from leaking fluid by a plurality of packing cylinders, a branch pipe between a plurality of packing spaces, or one packing cylinder and insert packing. In addition, the infiltration of the fluid into the thermal insulation space is prevented, but the minutely generated leakage fluid is discharged through the drain hole 150.

The expansion joint device of the double-insulation double tube of the present invention is known that the expansion and contraction of the expansion joint devices known in the conventional joints to improve the amount of expansion due to the linear expansion of the central tube due to the temperature difference of the fluid is complicatedly installed in the joint pipe connected to the center pipe Even if fluctuations occur, it is applied to a flexible joint device that allows the leakage of fluid from the joint and the vacuum of the insulating space.

1 is a cross-sectional view showing an example of a conventional expansion joint device of a double insulation pipe,

Figure 2 is a cross-sectional view of a first embodiment of the expansion joint device of the heat insulation double pipe of the present invention,

Figure 3 is a cross-sectional view of a second embodiment of the expansion joint device of the heat insulation double pipe of the present invention,

Figure 4 is a cross-sectional view of the center tube of the first and second embodiments of the expansion joint device of the heat insulation double pipe of the present invention,

5 is a cross-sectional view of a second embodiment of the expansion joint device of the present invention double insulation pipe,

Figure 6 is a cross-sectional view of a third embodiment of the expansion joint device of the present invention double insulation pipe,

7 is a cross-sectional view of a fourth embodiment of the expansion joint device of the heat insulation double pipe of the present invention,

8 is a cross-sectional view of a fifth embodiment of the expansion joint device of the heat insulation double pipe of the present invention,

9 is a cross-sectional view of a sixth embodiment of the expansion joint device of the heat insulation double pipe of the present invention,

10 is a cross-sectional view of the seventh embodiment of the expansion joint device of the heat insulation double pipe of the present invention.

※ Explanation of code for main part of drawing

100: jacket pipe, 110: center pipe, 120: joint pipe, 130: clamping member, 140: packing part,

150: leaking fluid discharge and vacuum check,

Claims (9)

delete delete delete delete delete delete delete delete A central tube 110 through which fluid is conveyed; One end is formed of a stuffing box 122 is formed to extend the diameter of the center tube 110 is inserted slide movable, the other end is a joint pipe 120 made of the same diameter as the center tube 110, Jacketed tube 100 to surround the center tube 110 and the joint pipe 120 to form a thermal insulation space, Injecting the packing material 143 as the packing cylinder 141 from the jacket tube 100 side to the center tube 110 side, independent of the insulating space between the jacket tube 100 and the joint pipe 120 The packing part 140 is provided with an injection hole body 142c centered on the packing cylinder 141 to form the in-space, and forms an injection hole 142 that is opened and closed by the injection hole cover 142a at the jacket tube 100 side. )Wow, The first packing space 144 for blocking the leakage fluid to the inner contact surface of the stuffing box 122, the packing cylinder 141 is installed, and the leakage fluid to the heat insulating space between the jacket pipe 100 and the center pipe 110 A second packing space 145 is formed on the inner circumferential surface of the stuffing box 122 so as not to penetrate, and a groove 153 is formed between the first and second packing spaces 144 and 145, but a stuffing box ( 12) is formed around the inner surface, the groove 153, the leakage fluid discharge and vacuum check port 150,  The joint pipe 120 is connected to be supported by the jacket pipe 100, and the stuffing box 120 having the leakage fluid discharge and vacuum check port 150 and the packing unit 140 are oppositely positioned at both sides. The clamping member 130 is installed in the pipe 120, The expansion joint device of the insulating double pipe including a communication line (154) connecting the leakage fluid discharge and the vacuum check port 150 on both sides of the clamping member (130).

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