JP2008196617A - Pipe structure and method for expanding and contracting the pipe structure - Google Patents

Abstract

【Task】
Even when a rigid pipe member made of metal, FRP, or the like is attached to a movable structure by a support material, the pipe member follows the structure to which the pipe member moves, expands and contracts, and flows in the pipe member. An object of the present invention is to provide a pipeline structure that can maintain airtightness so that gas does not leak.
[Solution]
At least two pipe members of different sizes attached to a movable structure by a support material are fitted into each other in a stretchable manner, and the outer periphery of the end of the other pipe member fitted into one pipe member A pipe structure characterized by providing a seal mechanism that can be expanded outward and a wheel member that movably supports the one pipe member following the movement of the structure.
[Selection] Figure 1

Description

  The present invention relates to a pipe structure such as a duct called a square or round air passage installed in a movable structure, and a method for expanding and contracting the pipe structure, and in particular, fitting ducts of different sizes in a telescopic manner. The present invention relates to a pipe structure and a method for expanding and contracting such a pipe structure.

  Conventionally, rigid air-conditioning and ventilation ducts in offices and factory buildings, or rigid ducts made of metal or vinyl chloride for factory plants, are simply supported on a fixed structure such as a ceiling or wall. It is only fixed.

In addition, ducts are not necessarily fixed only to fixed structures such as ceilings and walls with support materials, but are movable like passenger boarding bridges and passenger boarding bridges in airport facilities and port facilities. The structure is also attached by a support material.
JP-A-8-144493

  As described above, rigid ducts such as ducts according to the prior art are not only fixed to a stationary structure such as a ceiling and a wall by a support material, but also fixed to a moving structure by a support material. There is also a case.

  For this purpose, a flexible conduit having a flexible function has been conventionally used. As a flexible pipe line, there is one using a flexible duct as described in Patent Document 1.

  However, the duct shown in Patent Document 1 is a duct having a flexible structure in which the duct itself has a flexible function. When such a flexible duct is used in a moving structure, the flexible duct is moved by the movement of the structure. If the air is blown, the resistance in the flexible duct will increase, or the flexible duct will cause movement that cannot be assumed by the air flow, and the flexible flexible duct itself and surrounding structures will be damaged. There is. Further, the slack of the duct causes a sense of incongruity in the design of the appearance.

  In the past, air from an air conditioner was blown to a pipeline structure buried underground and supplied to an aircraft. However, inspection, repair, and replacement are extremely difficult. Furthermore, it is extremely difficult to repair buried ducts due to land subsidence at the offshore airport constructed in the landfill site of the sea, and construction of buried pipe members at existing airfields that do not have air conditioning equipment for aircraft. However, it is extremely difficult due to the extremely thick concrete, a large amount of rebar, aircraft fuel pipes, and electric pipes for electric wires, etc. In addition, it is difficult to close the parking area for a certain period as a public transportation means, and it is almost impossible to cope with the conventional buried pipeline system.

  The present invention has been made in view of the above points, and its purpose is to provide a duct member even when a rigid duct member made of metal or FRP is attached to a moving structure with a support material. An expandable / contractible duct structure that expands and contracts following a moving structure, and that can maintain hermeticity so that a gas such as air flowing in the duct member does not leak, and The object is to provide a method for expanding and contracting a pipe structure.

  In order to solve the above-described object, the pipe structure of the present invention is configured such that at least two pipe members of different sizes attached to a movable structure by a support member are fitted to each other so as to be extendable and contracted. A wheel member that provides an outwardly expandable seal mechanism on the outer periphery of the other pipe member fitted in the member and that supports the other pipe member movably following the movement of the structure. Is provided.

  In the pipe structure of the present invention, at least one wheel member is a caster attached to the lower side of the end of the other pipe member or the inner side of the end of the one pipe member. And Furthermore, the pipe structure of the present invention is characterized in that the pipe member is a circular or square pipe member of various sizes made of metal or FRP. Furthermore, in the pipe structure of the present invention, the sealing mechanism has an annular elastic member surrounding the pipe member, and the elastic member is expanded and contracted by supply and discharge of pressure air to seal between the two pipe members. It is characterized by doing. In the pipe structure of the present invention, at the end of expansion and contraction of the pipe member during the movement of the structure, the pressure member in the vicinity of the blower outlet of the blower is guided by the pipe member to expand the elastic member of the seal mechanism. Closed to the inner wall of the path member to prevent leakage of pressurized air from between the two pipe members, and at the start of movement of the structure, the compressed air in the expanded elastic member is discharged so that the pipe member can be expanded and contracted It is characterized by that.

  The method for expanding and contracting the conduit structure of the present invention is a seal provided on the outer periphery of the end of one of the at least two conduit members of different sizes fitted to each other so as to be expandable outwardly. Extending and contracting a pipeline structure comprising a mechanism, a wheel member provided to movably support the one pipeline member, and a pressurized piping circuit having a blower, a plurality of automatic opening / closing valves and a control panel In the method, the step of operating the blower to blow air to the pipe member, the step of measuring the pressure at the blower outlet and the pressure in the pipe member with a pressure sensor and detecting the pressure difference with the differential pressure detector, And a step of supplying a part of the pressurized air to the sealing mechanism and expanding it to seal between the two pipe members when the difference is equal to or greater than a predetermined value. Further, the method for expanding and contracting the pipe structure of the present invention is such that when the pressure difference is less than or equal to a predetermined value, the seal mechanism is expanded by assisting the supply of pressurized air as an auxiliary pressurizing source by a pressurizing generator. It further has the process of assisting. Further, according to the method for expanding and contracting the pipe structure of the present invention, when the structure needs to be moved, the operation of the blower is stopped, and one of the automatic open / close valves is opened to communicate with the outside air to reduce the pressure in the seal mechanism. And a step of separating the seal mechanism from the pipe member.

  According to the present invention, a structure in which a pipe member is moved by a moving wheel such as a caster even when the pipe member made of metal, FRP, or a combination thereof is attached to a moving structure by a support material. By providing a seal mechanism that smoothly expands and contracts following and moves, and expands and contracts by gas pressure, the airtightness can be maintained so that the gas flowing in the pipe member does not leak. In addition, it is possible to save energy by using a part of the gas pressure immediately after the blower blows out as a pressure source, and to back up by a pressure cylinder or a pressure generator even when the pressure of the pressure source decreases. Thus, the sealing mechanism can be pressurized and expanded to reliably prevent leakage of the gas flowing in the pipe member. Further, a flange fixing means is employed so that the caster as the moving wheel member and the elastic member of the seal mechanism can be easily inspected and replaced.

  By such a telescopic pipe member, for example, a terminal building of an airfield and an aircraft are connected, and a pipe line is formed by a support material on a boarding bridge on which passengers get on and off by expanding and contracting the pipe member depending on the type of aircraft and moving to the left and right. It is possible to cool and heat the air by installing members, and sending air pressure from the air conditioning equipment to the aircraft in the summer and cool air in the summer, and warm air in the winter, which is extremely effective from the viewpoint of airfield passenger service in the future.

  Embodiments of the present invention will be described below in detail with reference to the drawings. In addition, although this invention is demonstrated below about the pipe structure which has a round pipe line member, it is not restricted to a round pipe member, Polygons, such as a triangle and a rectangle, or a pipe line like a rectangle Of course, the present invention can also be applied to a pipe line structure having members.

  FIG. 1 to FIG. 4 relate to one embodiment of the present invention, and show a pipe structure having a circular cross section as an example, FIG. 1 is a longitudinal sectional view, FIG. 2 is a right side view, FIG. Fig. 4 is a left side view, Fig. 4 is a pressurization piping circuit diagram of a seal portion, and Fig. 5 is a control flowchart. 6 and 7 are schematic diagrams for inspecting and exchanging the seal part and casters of the telescopic pipe structure. FIG. 6 shows that one of the pipe members has been moved to a position where it can be inspected and replaced. FIG. 7 is a view when the other pipe member is removed for replacement.

  As shown in FIG. 1 to FIG. 3, the pipe structure 1 of the present invention has a plurality of large and small rigid members having different diameters in the illustrated embodiment, such as a metal, FRP, or a combination thereof. The pipe members 2 and 4 are fitted into a telescopic cylinder, and a seal portion 5 and a caster 6 that is movably supported are provided between the pipe members 2 and 4. In the illustrated embodiment, two casters 6 are provided on the lower side as shown in FIG. 2 as rolling members such as rollers and roller members in order to support the weight of the pipe member 4 due to its own weight. Of course, the number of casters 6 may be only one, and it is preferable that the casters 6 are divided into two on the left and right in consideration of weight distribution. The caster 6 can also be provided on the inner side of the end of the large-diameter pipe member 2A.

  The pipe structure 1 in the present invention is attached to an outer wall of a structure such as a boarding bridge capable of moving the pipe members 2 and 4 by an appropriate support material, and is attached to the small-diameter pipe member 4. Pressure flowing in the pipe structure 1 by providing a sealing mechanism 5 that smoothly expands and contracts and moves following the structure in which the rigid pipe structure 1 moves by the casters 6 and expands and contracts by gas pressure. Airtightness can be maintained so that a gas such as air does not leak from between the pipe line members 2 and 4.

  Further, by using the seal mechanism 5 as a pressure source, usually the pressure immediately after the blower blows out, energy can be saved, and even when the pressure of the pressure source decreases, the pressure cylinder or pressurization is performed. The seal mechanism 5 can be pressurized and expanded by the backup by the generator, and the leakage of the gas flowing in the pipeline structure 1 from between the pipeline members 2 and 4 can be reliably prevented. Further, a flange fixing means is employed so that the seal mechanism 5 and the caster 6 can be easily inspected, repaired and replaced. Further, by providing a brush-like or rubber-plate-like closing plate member 3 as a device for removing condensed water, rainwater, and deposits on the outer surface of the pipe members 2, 4 of the rigid pipe structure 1, the pipe structure 1 It becomes possible to prevent moisture and dust from entering the inside.

  Such a telescopic pipe structure 1, for example, connecting a terminal building and an aircraft at an airfield, expanding and contracting depending on the model, and a boarding bridge on which passengers get on and off by moving left and right as a structure, is supported by a support material on this boarding bridge The air-conditioning gas from the air-conditioning facility is mounted on the aircraft so that it can be cooled and heated by blowing air as cool air in summer and as warm air in winter.

  As shown in FIG. 1, the pipe members 2 and 4 having different diameters of the pipe structure 1 of the present invention can be expanded and contracted at the ends of the pipe members 2 and 4 as the structure moves. And a connection structure 10 configured to be hermetically sealed. Such a connection structure 10 in the pipe members 2 and 4 includes a pipe member 2A provided as a small section at the end of the large-diameter pipe member 2, and a pipe member fitted into the pipe member 2A. The pipe member 4A is formed as a small section of the small-diameter pipe member 4 disposed with an annular gap S between the pipe member 2A. One end of the large-diameter pipe member 2A is connected via a flange portion 12 corresponding to the flange portion 2a at the end of the pipe member 2, and the other end is a closing plate member 3 having a brush shape or a rubber plate shape. Closed by. The small-diameter pipe member 4A has an open end as a free end in the large-diameter pipe member 2, and a flange portion 16 is provided at the other end. The pipe member 4 is connected to the flange portion 18 at the end. An appropriate packing 17 is suitably provided between the flange portions 16 and 18.

  A wheel member such as a caster 6 is attached to a rigid duct member 4 having a small outer diameter so that the duct structure 1 can be expanded and contracted, and gas is caused to flow into the rigid duct structure 1 by a blower at the end of movement and expansion / contraction. Sometimes, the pressure close to the blower outlet of the blower is guided by a pipe member 7 such as a hose, and an elastic member 8 such as elastic rubber attached to the small diameter pipe line member 4 is expanded to provide a large diameter pipe line member. 2 is a seal mechanism capable of preventing gas leakage by being in close contact with the inner wall 2 and discharging the pressure in the elastic member 8 such as elastic rubber expanded at the start of movement and expansion / contraction of the pipe structure 1. 5 is formed.

  Further, if necessary, it is possible to repair the moving wheel such as the caster 6 and the elastic member 8 of the elastic sealing mechanism 5 for maintaining the sealing performance, and to facilitate the replacement. Furthermore, in order to prevent dew condensation, rainwater, and adhering foreign matter adhering to the surface of the rigid pipe member 4 from entering the pipe member 2, a brush-like member or an elastic rubber plate is used. It is characterized in that the closing plate member 3 is detachably attached to the end portion of the pipe line member 2A as a removing device from an elastic member.

  As shown in the enlarged partial view of FIG. 1, the seal mechanism 5 has an annular member 14 such as a groove-shaped member on the outer surface of the pipe member 4 </ b> A at the end of the pipe member 4. The annular member 14 has a groove-like annular outer peripheral surface, and is adhered and fixed to the outer peripheral surface of the pipe line member 4A with an appropriate adhesive, and has an annular shape that opens outward. A groove 15 is provided. Further, an elastic member 8 such as rubber is attached to the annular groove portion 15 opened outward of the annular member 14, and the tube member 7 is interposed in the groove portion 15 covered by the elastic member 8. Then, a pressure gas such as pressurized air is supplied, whereby the elastic member 8 is expanded and is in close contact with the inner wall surface of the pipe line member 2A for sealing.

  Further, when the supply of the pressure gas into the groove portion 14 of the annular member 14 is stopped and discharged, the inside of the groove portion 15 of the annular member 14 is depressurized, the elastic member 8 is recessed inward, and the elastic member 8 is tubed. Since it is away from the inner wall surface of the road member 2A, the pipe members 2, 4 can be moved with the movement of the structure, the surface of the elastic member 8 is not damaged at all, and the pipe member 2, 2A, 4, 4A can move with the structure.

  In order to facilitate movement together with the structure of such pipe members 2, 2A, 4, 4A, for example, a caster 6 as a wheel member for moving the pipe member 4A has a small-diameter pipe member. On the basis of the weight of 4, a plurality of casters 6 are suitably attached to the lower side of the pipe line member 4 as shown in FIG.

  As shown in the enlarged partial view of FIG. 2, the caster 6 has a rolling member 22 such as a roller or a roller that forms a caster member, and a pair that rotatably supports the rolling member 22 from both left and right sides. And a mounting member 25 addressed from the inside of the pipe member 4A for mounting the support member 24 on the surface of the pipe member 4A, and is attached by screws or bolts 26. It has been.

  In addition, when the expandable and contractible pipe members 2, 2A, 4, 4A expand and contract, stop at a certain position, and flow the pressure gas by the blower, the elastic member 8 such as elastic rubber is expanded. As a pressure source for maintaining the sealing performance for the purpose of preventing the leakage of the pressure gas, the pressure gas is introduced into the seal mechanism 5 through the tube member 7 such as a hose, and is used for the pressurization and expansion of the blower. The pressure closest to the outlet can be used as the main pressure source. In addition, when the pressure of the main pressure source is insufficient, it is preferable that the pressure detection device attached to the duct member 2 or 4 near the blower outlet, the blower outlet of the blower, The pressure piping circuit described later having a pressure cylinder or a pressure generating device is connected by piping, and an automatic on-off valve is installed in the middle of each piping, and the pressure of the pressure detection device that is always installed in the immediate vicinity of the blower outlet of the above blower When the pressure difference with the pressure in the pressure detection device attached to the pipe line member 2 or 4 is equal to or greater than a predetermined pressure, the automatic open / close valve attached to the pipe immediately adjacent to the blower outlet is opened and pressurized. The seal mechanism 5 is pressurized and expanded by closing the automatic open / close valve attached to the cylinder or the piping of the pressurizing generator.

  When the pressure difference between the two pressure detection devices becomes equal to or lower than the predetermined pressure difference, the pressure of the pressure cylinder or the pressure generator is guided to the seal mechanism 5 by reversely operating the automatic open / close valve. The gas is prevented from leaking by pressurizing and expanding to bring the inner surface of the large-diameter pipe member 2 into close contact with the seal mechanism 5 attached to the outer surface of the small-diameter pipe member 4. When the moving structure moves again, it is attached to a pipe branched separately from the pipe connected between the joint connection portion of the pipe to which the automatic open / close valve is attached and the seal mechanism 5. By opening the automatic open / close valve, the pressure in the seal mechanism 5 is reduced, and the seal mechanism 5 is contracted to prevent the seal mechanism 5 from being damaged, and the telescopic pipe member 2 or 4 Make it easy to expand and contract. The system diagram and control means of such a pressurized piping circuit will be described in detail later with reference to FIGS.

  End portion 2A of large-diameter pipe line member 2 so that inspection and replacement of the moving wheel member such as caster 6 and sealing mechanism 5 constituted by elastic member 8 such as elastic rubber can be easily performed. The end portion 4A of the pipe member 4 including the seal mechanism 5 attached to the outer surface of the end portion of the small diameter pipe member 4 It is a fixed type that is attached by a flange portion 16 as a small section of a certain length.

  When inspecting or replacing the seal mechanism 5 or the caster 6, the pipe member 2A of the fixed portion by the flange portion 12 of the large-diameter pipe member 2 is loosened and then moved along the small-diameter pipe member 4. After that, the seal mechanism 5 and casters 6 are inspected and replaced. In addition, a small-diameter pipe line having a fixing portion by a flange portion 16 to which a seal mechanism 5 and casters 6 prepared separately as a spare part, including a small-diameter pipe line member 4 to which the seal mechanism 5 and casters 6 are attached, is prepared. When replacing the member 4A, loosen the pipe member 4A as the fixed part by the existing flange part 16 and then remove it, replace it, firmly attach the pipe member 4A by the flange part 16 again, and further move The large-diameter pipe member 2A is returned to its original position, and the flange portions 2A and 12 are fixed and firmly attached.

  The closing plate member 3 as a removing device for preventing intrusion of condensed water, rainwater, and adhering matter is attached to the end portion of the pipe member 2A of the large-diameter pipe member 2, and does not damage the surface in terms of material. In this way, it is made of a flexible material such as a brush or rubber plate, and has a structure that can be removed and replaced by bolts when worn or deteriorated.

  4 is a pressurization piping circuit diagram of the seal mechanism, and FIG. 5 is a control flowchart for controlling the seal portion by the pressurization piping circuit of FIG.

  As shown in FIG. 4, the pressurization piping circuit 30 of the seal mechanism 5 sends out pressure gas into the pipe line structure 1 and adjusts the blower 31 as a pressurization source of the seal mechanism 5 and the air volume and wind pressure of the blower 31. Electric or fluid pressure type automatic opening / closing valve 32, electric or fluid pressure type automatic opening / closing valve 33, 34, 35, pressure sensor 36 for measuring the pressure in the outlet of the blower 31 and the pipe member 4 37, a differential pressure detector 38 for detecting the pressure difference, a pressurization cylinder or pressurization generator 39 as an auxiliary pressurization source of the blower 31 as a pressurization pressure source, an opening / closing valve 40, an auxiliary And a pressure adjusting device 41 of a pressurizing source.

  The pressurizing piping circuit 30 includes pressure sensors 36 and 37, a differential pressure detector 38, a control panel 45 that comprehensively controls the automatic open / close valves 33, 34, and 35, an automatic open / close damper 32, pressure sensors 36 and 37, A wiring 47 for connecting the differential pressure detector 38 is provided.

  Such an operation in the pressurized piping circuit 30 is shown in the control flow of FIG. 5 after the pipe members 2, 2A, 4, 4A expand and contract and stop at a predetermined position following the movement of the structure. To be operated.

  As shown in the drawing, first, the operation of the blower 31 is started by turning on the operation switch in step S1.

  Next, in step S2, the automatic open / close valve 34 is opened and opened, and the automatic open / close valves 33 and 35 are closed and closed.

  After the blower 31 in step S1 is operated, in step S3, the pressure value immediately after the outlet of the blower 31 is measured by the pressure sensor 36, and the pressure value in the pipe member 2 or 4 is measured by the pressure sensor 37. The pressure difference is measured and detected by the differential pressure detector 38.

  At this time, if the pressure difference is equal to or greater than a predetermined numerical value, for example, approximately 200 mmAq, the process proceeds according to “NO” in step S3, and the elastic member 8 of the seal portion 5 is sufficiently expanded outwardly. The sealing effect is exhibited by being in close contact with the inner wall surface. Thus, the fluid such as the pressure gas from the blower 31 can reach the target location without leaking from the duct members 2, 2A, 4, 4A, and the intended purpose of sealing can be achieved.

  In step S3, if the pressure differential pressure detected by the differential pressure detector 38 is not more than a predetermined value, for example, 200 mmAq or less, the process proceeds to step S4 according to “YES” in step S3, and in step S4. Then, by closing the automatic open / close valves 34 and 35 and closing the automatic open / close valve 33 and opening the automatic open / close valve 33, pressure gas is supplied by a pressurizing generator 39 such as a pressurizing cylinder as an auxiliary pressurizing source. As a result, the elastic member 8 of the seal mechanism 5 is sufficiently expanded to be brought into close contact with the inner wall surfaces of the pipe line members 2 and 2A so that a sealing effect is exhibited.

  With the above operation, a fluid such as gas from the blower 31 can reach the target location without leaking the pipe members 2, 2A, 4, 4A. Also, the elastic member 8 of the seal mechanism 5 is damaged by adjusting the expanded pressure applied to the elastic member 8 of the seal mechanism 5 to the required pressure by the pressure adjusting device 41 of the pressurizing generator 39 of the auxiliary pressure source. In order to prevent this from happening, the magnitude of the pressurizing pressure can be adjusted to a necessary and sufficient value.

  Further, when the structure 100 attached with the pipe members 2, 2A, 4, 4A is expanded and contracted, the operation switch is turned off to “off” to stop the operation of the blower 31 and the automatic opening / closing valve 33. , 34 are closed and the closed state is set, and the automatic opening / closing valve 35 is opened and set to the open state. Thereby, the pressure in the elastic member 8 of the seal mechanism 5 is reduced and the elastic member 8 is separated from the inner wall surface of the pipe member 2A, so that the structure 100 can be moved.

  By closing the automatic open / close valves 33 and 34 and opening the automatic open / close valve 35 in this way, the pressure applied to the seal portion 5 is reduced, and the elastic member 8 of the seal mechanism 5 is changed from the expanded state to the contracted state. The pipe member 2, 2A, 4, 4A can be expanded and contracted following the movement of the structure 100 to expand and contract the structure 100. Therefore, in this case, the breakage of the elastic member 8 of the seal mechanism 5 can be suitably prevented.

  Furthermore, when the structure 100 to which the pipe members 2, 2A, 4, 4A are attached stops at a predetermined position and is blown again to the target location by the blower 31, the operation of the control flow diagram described above is repeated. The expansion and reduction functions of the seal mechanism 5 can be exhibited. The pipe members 2, 2A, 4, 4A and the seal mechanism 5 are not limited to a single one, and a plurality of pipe members 2, 2A, 4, 4A can be installed depending on the purpose.

  6 and 7 show that the pipe member 2, 2A, 4, 4A is stopped at a position where the elastic member 8 or the caster 6 of the seal portion 5 or the caster 6 can be inspected, maintained, or replaced, and the pipe structure. 1 shows a state in which one pipe member 2, 2A, 4, 4A is stopped within a removable range.

  6 and 7 show a state in which the seal mechanism 5 and casters 6 are inspected, maintained, and replaced. When the seal mechanism 5 and casters 6 are inspected, maintained, and replaced, first, at the position shown in FIG. The bolts 20 at the flange portions 2a and 12 of the pipe members 2 and 2A are removed, and the pipe member 2A is moved to the left in FIG. 6 along the pipe member 4 and moved to the position of FIG.

  Next, the pipe member 7 in the pipe members 4, 4A is first removed from the annular member 14 of the seal mechanism 5, and then the bolts 21 in the flange portions 16, 18 of the pipe members 4, 4A are removed to connect the pipe member 4A to the pipe. It removes from the road member 4, moves to the position or state which can confirm each state of the pipe members 2, 2A, 4, 4A, arrange | positions, and implements the inspection of each part of the pipe structure 1, and maintenance. If the pipe member 4A is replaced, the bolt 21 can be removed and replaced with another new pipe member 4A prepared as a spare.

  Before removing the bolts 20 of the pipe members 2 and 2A, it is preferable that the pipe members 2 and 2A are temporarily fixed to the structure 100 with a temporary support member 102 or a chain so that the pipe members 2 and 2A are not dropped. Yes, it is necessary. It should be noted that the connecting portions between the main pipe members 2 and 2A and the removable pipe members 4 and 4A are sealed in the flange portions 2a, 12, 16, and 18 by the packings 13 and 17 so that there is no gas leakage. Sex is secured.

  The rigid stretchable duct structure 1 attached to the structure 100 by appropriate support members 101 and 102 is preferably light and strong enough to bend as much as possible, and further, condensation is generated. It is preferable to manufacture with less material. In addition, take measures such as selecting a weather-resistant material and applying paint that has a considerable effect in consideration of the installation in an environment exposed to ultraviolet rays, outside temperature, humidity, etc. due to external installation. It is preferable to do.

  The present invention relates to a boarding bridge when a passenger boarding board having different sizes for each aircraft expands and contracts between a passenger terminal building and various types of aircraft when cooling and heating an aircraft parked at an airfield. Can be used in an industrial field in which a pipe structure useful as an extendable air passage is manufactured and sold in the upper part of the ceiling, the side wall part, or the lower part of the floor.

The longitudinal cross-sectional view which shows the circular pipe line structure as one of the embodiment of this invention, Right side view of the pipe structure of FIG. Left side view of the pipe structure of FIG. System diagram showing the pressurized piping circuit of the sealing mechanism, FIG. 4 is a control flowchart for controlling the seal mechanism; Telescopic pipe structure sealing mechanism, caster inspection, replacement procedure diagram, It is a figure when one pipe line member of the pipe line structure of Drawing 6 is pulled out and the other pipe line member is removed in order to exchange.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pipeline structure 2, 2A Pipeline member 3 Closure board member 4, 4A Pipeline member 5 Seal mechanism 6 Caster 7 Pipe member 8 Elastic member 10 Connection structure 12 Flange part 13 Packing 14 Annular member 15 Groove part 16 Flange part 17 Packing 18 Flange portion 20 bolt 21 bolt 22 rolling member 24 bearing member 25 mounting member 26 bolt 30 pressurized piping circuit 31 blower 32 automatic opening / closing damper 33 automatic opening / closing valve 34 automatic opening / closing valve 35 automatic opening / closing valve 36 pressure sensor 37 pressure sensor 38 differential pressure Detector 39 Pressure generating device 40 Valve for opening and closing 41 Pressure adjusting device 45 Control panel 47 Wiring 100 Structure 101 Support material 102 Support material

Claims (8)

  At least two pipe members of different sizes attached to a movable structure by a support material are fitted into each other in a stretchable manner, and the outer periphery of the end of the other pipe member fitted into one pipe member A pipe structure characterized in that an expandable seal mechanism is provided outward and a wheel member is provided that movably supports the other pipe member following the movement of the structure.   2. The pipe line according to claim 1, wherein at least one of the wheel members is a caster attached to a lower side of an end of the other pipe member or an inner side of an end of the one pipe member. Construction.   2. The pipe structure according to claim 1, wherein the pipe member is a circular or square pipe member of various sizes made of metal or FRP.   2. The seal mechanism according to claim 1, wherein the seal mechanism includes an annular elastic member surrounding the pipe member, and the elastic member is expanded and contracted by supplying and discharging pressurized air to seal between the two pipe members. Pipe structure.   At the end of expansion and contraction of the pipe member during the movement of the structure, the elastic member of the seal mechanism is expanded by guiding the pressure air in the immediate vicinity of the blower outlet through the pipe member, and is brought into close contact with the inner wall of the one pipe member. The pressure air from both pipe members is prevented from leaking, and at the start of movement of the structure, the pressure air in the expanded elastic member is discharged so that the pipe members can be expanded and contracted. The pipe line structure according to any one of 4. A seal mechanism provided on the outer periphery of an end of one of the at least two pipe members of different sizes that can be expanded and contracted with each other, and the one pipe member can be moved. In a method of expanding and contracting a pipe line structure including a wheel member provided to support a pressure fan circuit, a pressure pipe circuit having a plurality of automatic opening / closing valves and a control panel,
A step of operating the blower to blow air to the pipe member;
Measuring the pressure at the outlet of the blower and the pressure in the pipe member with a pressure sensor and detecting the pressure difference with a differential pressure detector; and
When the pressure difference is equal to or greater than a predetermined value, supplying a part of the pressure air to the seal mechanism and expanding it to seal between the two pipe members;
A method for expanding and contracting a pipeline structure characterized by comprising: When the pressure difference is equal to or less than a predetermined value, a process of assisting the seal by expanding the seal mechanism by assisting the supply of pressurized air by the pressurizing generator as an auxiliary pressure source,
The method for expanding and contracting the conduit structure according to claim 6, further comprising:   When it is necessary to move the structure, the operation of stopping the blower, opening one of the automatic opening / closing valves, communicating with the outside air, reducing the pressure in the sealing mechanism, and separating the sealing mechanism from the pipe member is included. A method for expanding and contracting the conduit structure according to claim 6.

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