JP3756239B2 - Method and apparatus for hermetic penetration of cable in ceiling of pressurized submerged chamber - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus and a method for hermetically penetrating a working room ceiling through a hydraulic hose, a measurement cable, and the like connected to various devices in a pressurized air latent work room under a high pressure environment.
[0002]
[Prior art]
In the pressurized air submersion method, various operations such as ground excavation and loading tests are performed in a high-pressure work chamber, and various devices used for the work are brought into the work chamber. A cable, a hydraulic pipe and other pipes (hereinafter abbreviated as “cable”) are provided through the pressurized air latent housing.
FIG. 21 shows a cross section of the working chamber of the pressurized air concealment. A traveling rail 13 is attached to the ceiling 2 of the working chamber, and the excavator 14 works while traveling along the traveling rail 13. The ground 16 is excavated in the chamber 15.
[0003]
As described above, various devices other than the excavator 14 are disposed in the work chamber 15, and various cables 11 for supplying electric power, air pressure, and hydraulic pressure to these devices are introduced from outside the box. In the prior art, the cable 11 for this purpose is buried in a pressurized air enclosure 17 as shown in the figure, and the cable tip 11 a is guided into the working chamber 15.
[0004]
[Problems to be solved by the invention]
Conventionally, various cables that connect to various devices in the working chamber of the compressed air submersible are led from the outside into the working chamber by the so-called burying method embedded in the submerged body, so if this cable is disconnected, it can be recovered and replaced. For this reason, a spare cable is required, and even if an attempt is made to add a device to the work room, the connection cable cannot be added.
[0005]
On the other hand, it is conceivable that a cylindrical metal fitting that penetrates the ceiling of the work room is embedded in the ceiling slab, and a cable is inserted into the ceiling slab to introduce the cable from the outside into the work room. Due to the high pressure in the working chamber, there is a problem that a smooth cable penetrating operation cannot be performed unless a special penetrating portion closing structure is devised so that the high-pressure air in the working chamber does not blow out during the cable penetrating operation.
[0006]
It is an object of the present invention to provide a cable hermetic penetrating device and method in the ceiling of a pressurized air latent work chamber that solves the above-mentioned problems.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the cable hermetic penetrating method in the ceiling of the working chamber of the pressurized air according to the present invention is provided through the working chamber ceiling 2 of the working chamber 1, and the upper and lower openings 3 and 4 are covered. 5 and 6 are closed, and the lower cover 6 of the cylindrical through metal fitting 7 that can communicate with the inside and outside of the box through the outside communication valve and the inside communication valve is removed. After the opening of the bottomed cylindrical mounting / dismounting bracket 10 having an airtight connection 8 is hermetically connected to make the inside of the mounting / detaching bracket 10 atmospheric pressure, the upper cover 5 of the cylindrical penetrating bracket 7 is removed. The outer cable mounting bracket 12 having a valve in the upper opening 3 and the cable 11 passing through in an airtight manner is connected in an airtight manner, and the lower portion of the cable 11 is suspended in the inner mounting / demounting bracket 10. Open the valve 8 of the bracket 10 and record the pressure inside the sealed internal space. After substantially equally and pressure, characterized in that removing the box making the detachable fitting 10 from the lower end of the tubular through fitting 7.
In addition, the cable hermetic penetrating device in the ceiling of the pressurized air latent work chamber according to the present invention has an upper opening 3 located outside the box of the cylindrical through metal fitting 7 provided through the working room ceiling 2 of the pressurized air latent housing 1. Further, the outer cable mounting brackets 12 and 12A having valves 50 and 67 and through which the cable 11 penetrates in an airtight manner are airtightly and detachably coupled to each other, and the lower portion located inside the cylindrical penetration fitting 7 The opening 4 has a valve 8 and has a structure in which a bottomed cylindrical detachable metal fitting 10 that can be accommodated in the sealed space is airtightly and detachably coupled to the lower portion of the cable 11.
[0008]
According to the present invention, in the working chamber ceiling 2 of the pressure submersible 1 having a large pressure difference between the inside and outside of the box, the outside cable attachment fittings 12 and 12A and the inside of the box are provided on the upper and lower portions of the cylindrical penetration fitting 7. By attaching and detaching the detachable metal fitting 10 according to a predetermined procedure, various cables can be inserted into the work room ceiling 2 safely and efficiently.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to the drawings.
FIG. 1 is a cross-sectional view of a working chamber 15 of a pressurized air submersible 1 in which the cable hermetic penetrating device of the present invention is implemented, and shows a state in which a loading test of the ground 16 is performed in the working chamber 15. ing.
[0010]
The outline of the figure will be explained. The upper part of the support pipe 18 is arranged between the traveling rails 13 and 13 made of H-shaped steel arranged in parallel at a predetermined interval, and the support pipe 18. A fluid pressure (hydraulic) jack 21 having a loading flat plate 20 integrally provided at the lower end is disposed between the support pipe 18 and the ground 16. .
[0011]
The fluid pressure jack 21 further includes a displacement gauge 22 and a pressure transducer 23, and a cylindrical through-hole in which a cable 11 such as a hydraulic hose 24 and a measurement cable 25 connected thereto is embedded in the work room ceiling 2. It is led out from the working chamber 15 via the cable hermetic penetrating device 9 including the metal fitting 7 and led to the measurement chamber 26 on the ground. The hydraulic hose 24 is connected to the remote hydraulic unit 27 installed in the measurement chamber 26, the remote The measurement cable 25 is connected to the hydraulic unit controller 28 to a static strain measuring device 29, a personal computer 30, and a printer 31, respectively.
[0012]
In the apparatus of FIG. 1, by extending the fluid pressure jack 21, a reaction force is applied to the work chamber ceiling 2 via the upper end of the support pipe 18, and the loading flat plate 20 is pressed against the ground 16 to perform a loading test. Yes. In this case, the remote operation and data collection of the loading test are smoothly performed by connecting the cable 11 penetrating the work room ceiling 2 to various devices in the measurement room 26 by the cable hermetic penetrating device 9 as described above.
[0013]
The present invention is characterized by the cable hermetic penetrating device 9 provided on the ceiling 2 of the working room, which will be described next.
[0014]
FIG. 6 is a sectional view showing a final assembly state of the cable hermetic penetration device 9 as the first embodiment of the invention. In the figure, a cylindrical penetrating metal fitting 7 is fixed so as to penetrate the work room ceiling 2, and its upper opening 3 communicates with the outside of the box of the pressurized air latent cage 1 and the lower opening 3 communicates with the inside of the box. It has been. A cylindrical intermediate adjustment fitting 32 having a valve 8 for introducing gas into the inside thereof is fastened to the upper portion of the cylindrical penetration fitting 7 with bolts 35 between flanges 33 and 34 provided at the joining peripheral edge of each fitting 7 and 32. By being airtightly coupled.
[0015]
At the upper part of the cylindrical intermediate adjustment fitting 32, the outer shell cable mounting fitting 12 having a cylindrical outer shell through which the cable 11 penetrates hermetically is provided with flanges 36 provided on the joining peripheral edges of the fittings 32, 12. The members 37 are fastened together by fastening them with bolts 38. Further, the upper part of the cable 11 having the connector 40 at the end is led out to an appropriate length outside the box, and the lower part of the cable 11 having the connector 41 at the end is inserted through the cylindrical through metal fitting 7 into the box. It is drooping. Means for airtightly passing the cable 11 through the outer cable mounting bracket 12 is different between the first embodiment (see FIGS. 1 to 9) and the second embodiment (FIGS. 10 to 20). This will be described later.
[0016]
Next, an assembly process of the cable hermetic penetrating device 9 in the first embodiment of the invention will be described with reference to FIGS.
[0017]
FIG. 2 shows a first process in which the cylindrical through metal fitting 7 is integrally embedded through when the work room ceiling 2 is constructed. At this time, the upper and lower openings 3 and 4 of the cylindrical through metal fitting 7 are sealed by upper and lower lids 5 and 6 and communicate with the cylindrical through metal fitting 7 inside and outside the box. Valves 44 and 45 for opening and closing the passage are provided, respectively.
[0018]
At the time of the first step, the outside of the box is at atmospheric pressure and the inside of the box is at high pressure. At this time, the valve 45 is opened to set the inside of the cylindrical through metal fitting 7 to the box inner pressure, and the lower lid 6 is removed to remove the lower opening 4. open.
[0019]
FIG. 3 shows the second step, wherein the upper opening 46 of the bottomed tubular inner metal fitting 10 having the valve 8 is applied to the lower opening 4 of the cylindrical through metal fitting 7, and the flange 47, 48 is brought into contact, and the contact portion is hermetically fixed by a bolt 49. Next, the upper valve 44 is opened so that the inside of the cylindrical through metal fitting 7 and the inside / outside metal fitting 10 is at atmospheric pressure, and the upper lid 5 is removed from the upper end of the cylindrical through metal fitting 7.
[0020]
FIG. 4 shows a third step, in which the lower end of the cylindrical intermediate adjustment fitting 32 having the valve 50 is applied to the upper portion of the cylindrical penetration fitting 7, and the flanges 33, 34 of both fittings 7, 32 are hermetically sealed with bolts 35. Connecting.
[0021]
5 and 8 show the fourth step. The lower end of the outer cable mounting bracket 12 is applied to the upper end of the intermediate adjustment fitting 32, the flanges 36 and 37 of both fittings 32 and 12 are brought into contact with each other, and the bolt 38 is used to The abutting part is hermetically coupled.
[0022]
The outer cable mounting bracket 12 is filled with a mortar or other airtight filler 59 in a cylindrical outer shell 58 having a shoulder 57, and pressure from below is effectively received by the shoulder 57, and the upper opening is It is closed with a fixed lid 60. Further, the lower opening is closed by the bottom plate 61 so that the airtight filler 59 does not flow out from the cylindrical outer shell 58 before the curing, and the cable 11 is provided with the airtight filler 59, the fixed lid 60, and the like. The bottom plate 61 is penetrated in an airtight manner and is led out vertically. When the outer cable attachment fitting 12 is coupled to the upper end of the cylindrical intermediate adjustment fitting 32, the lower portion of the cable 11 hangs down through the cylindrical penetration fitting 7 until it reaches the bottom of the attachment / detachment fitting 10. The cable 11 is inserted through the fixed lid 60 and the bottom plate 61 through sleeves 62 and 63.
[0023]
Further, the cylindrical intermediate adjustment fitting 32 having the valve 50 is configured separately from the outer cable attachment fitting 12 for the convenience of design, and these can be provided integrally.
[0024]
6 and 9 show the final process. In the state shown in FIG. 5, the valve 8 is opened (the upper valve 50 is closed at this time), and the sealed space in the box mounting / removal fitting 10 is substantially equal to the box internal pressure. In addition, the bolts 49 are loosened, and the in-box fitting / removing fitting 10 is removed from the lower end of the cylindrical through fitting 7. At this time, as shown in FIG. 6, from the lower end of the cylindrical through metal fitting 7, the lower part of the cable 11 that has been suspended in the attachment / detachment metal fitting 10 in the box is exposed in the box for a length sufficient for handling. Therefore, the connector 41 at the lower part of the cable can be easily connected to the connector at the end of the cable connected to the device (not shown) side in the box.
[0025]
In the present invention, the role of the in-box fitting 10 is great. That is, in order to insert the cable 11 into the cylindrical through metal fitting 7 with the atmospheric pressure inside, the upper part of the bottomed cylindrical inner metal fitting 10 is attached to the lower end of the cylindrical through metal fitting 7 when the cable is inserted. The lower part of the cable 11 can hang down for a sufficiently long time inside, and after the cable is inserted, the inner metal fitting 10 is removed from the cylindrical through metal fitting 7 so that the lower part of the cable can be naturally attached to the inner cable. In this state, it can be exposed for a sufficiently long time, and the connection work through the connector becomes easy after that, and these functions and effects can be realized only by the bottomed cylindrical in-cabinet fitting 10.
[0026]
This means that, for example, the lower end of the cylindrical through metal fitting 7 is sealed with a simple flat lid (see, for example, FIG. 2), the upper part is opened to make the inside atmospheric pressure, and the cable 11 is placed inside the cylindrical through metal fitting 7. In the method in which the cable 11 is temporarily folded and stored, then the upper opening is closed, the flat lid at the lower end is opened, and the cable 11 is pulled out from the lower part of the cylindrical penetration metal 7. It is clear that it does not go smoothly because of the difficulty in handling inside.
[0027]
In addition, when the cable 11 passing through the cylindrical through metal fitting 7 on the ceiling 2 of the work room is replaced with a new one by disconnection or the like, when the cable 11 is added, the outer cable in which such a cable 11 is attached in advance. The mounting bracket 12 is prepared, and the existing outer cable mounting bracket 12 is removed from the upper portion of the cylindrical through-fitting 7 in the procedure of the sixth step → the fifth step → the fourth step, and the fourth step → the fifth step again. The cable 11 can be easily replaced or added by airtightly coupling the new outer cable attachment fitting 12 to the upper end of the cylindrical through fitting 7 in the sequence of step 6 to step 6.
[0028]
Next, a second embodiment of the invention will be described with reference to FIGS. In the second embodiment of the present invention, the cable sealing structure of the outer cable mounting bracket 12A is simplified compared to the outer cable mounting bracket 12 in the first embodiment.
[0029]
12-16, the upper end opening of the cylindrical main body 65 which has the valve | bulb 67 is closed by the cover board 66, and both are couple | bonded by the bolt 68 so that airtight and detachable. The lid plate 66 is provided with a plurality of sockets 70 that pass through the plate in the vertical direction and have internal threads 69 on the inner periphery, and are attached airtight by welding 71. There are three types of cables that are connected up and down via the socket 70: liquid, gas, and air. Corresponding to each, the connection structure of the insertion portion is slightly different, but all use known means. It doesn't matter.
[0030]
In FIG. 16, the case of three types of cables of liquid, gas and air will be described. When the cable 11 is a hydraulic hose 72, the nipples 73 are screwed onto the upper and lower sides of the socket 70 from the outer side and the inner side, respectively. Each nipple 73 is connected to a distal end of a hydraulic hose 72 on the outer side of the box and a hydraulic male coupler 74 with a valve attached to a distal end of the hydraulic hose 72a on the inner side of the box by screw connection.
[0031]
As shown schematically in FIGS. 17 and 18, the openings 75 and 76 on the connection side of the nipple 73 and the hydraulic male coupler 74 are closed by valve bodies 79 and 80 which are pushed by springs 77 and 78 accommodated therein, respectively. By connecting the nipple 73 and the hydraulic male coupler 74, the protrusions 81 and 82 projecting from the front center of the valve bodies 79 and 80 collide with each other, so that the valve bodies are relatively moved from the openings 75 and 76. 79 and 80 are retreated, and the openings 75 and 76 are automatically opened, and the hydraulic hose 72 outside the box and the hydraulic hose 72a inside the box are hermetically connected via the socket 70. On the other hand, by releasing each hydraulic male coupler 74 from the nipple 73, the opening of the hydraulic male coupler 74 is automatically closed by the valve body 79, and the opening 76 of each nipple 73 is also closed by the valve body 80, The pressure oil is not leaked.
[0032]
When the cable 11 is a pneumatic hose, in many cases, a pneumatic male coupler 84 with a valve is attached to the tip of a pneumatic hose 83 outside the box which is the pressure supply side, and a nipple 73 is connected to the opening on the outer side of the socket 70. Is done.
[0033]
The openings 85 and 86 on the connection side of the nipple 73 and the pneumatic male coupler 84 are closed by valve bodies 89 and 90 which are pressed by springs 87 and 88 housed inside, respectively, as in the case of hydraulic pressure. By coupling the nipple 73 and the pneumatic male coupler 84, the protrusions 91 and 92 projecting from the front centers of the valve bodies 89 and 90 collide with each other so that the valve bodies 89 and 90 are relatively moved from the openings 85 and 86. Retreat and open these openings 85 and 86.
[0034]
In the case of a pneumatic hose, unlike the hydraulic pressure, on the inner side of the box, the nipple 73 screwed to the lower end of the socket 70 may be a simple cylinder having a male screw on the outer periphery and not having a valve body. The coupler 84a attached to the end of the pneumatic hose 83a in the box may also have a structure that does not have a valve body and can be simply screw-coupled to the nipple 73. Accordingly, when the pneumatic male coupler 84 at the tip of the pneumatic hose 83 outside the box is detached from the nipple 73, the respective valve bodies 89 and 90 are automatically closed, and no pressure air is ejected from the tip of the pneumatic hose 83.
[0035]
Next, when the cable 11 is the electric wire 93, on the outer side of the box, the male screw part 98 of the fixing metal 96 of the connecting metal 95 in which the electric wire 93 is inserted into the inner peripheral female screw part 94 on the outer side of the socket 70a. Is fixed by screwing. The connection fitting 95 includes a cylindrical fastening fitting 97 through which the electric wire 93 is inserted, and the fixing fitting 96. The fixing fitting 96 is screwed into the socket 70 a and the male screw of the fastening fitting 97 is fixed to the fixing fitting 96. The annular packing 99 held in the fixing bracket 96 is pressed by the tip of the fastening bracket 97 via the washer 100, and the annular packing 99 is bulged inward to tighten the outer periphery of the electric wire 93. Thus, due to the close contact between the annular packing 99 and the electric wire 93, the electric wire 93 can be led out from the inner side of the box to the outer side of the box while maintaining airtightness.
[0036]
In the second embodiment of the present invention, a socket 70 is preliminarily disposed on the cover plate 66, and an unused socket (not shown) is sealed with a stopper, and the stopper is opened at the time of use. It is advisable to insert the cable 11 in an airtight manner.
[0037]
Also in the second embodiment of the invention, the valve 8 of the internal / detachable metal fitting 10 and the valve 67 of the external cable attachment metal 12 are alternately operated, and the steps shown in FIGS. The operation of replacing the cover plate 66 to which the newly required cable 11 is attached is carried out under atmospheric pressure through substantially the same process as the form), or only the cable 11 is passed through each socket 70 without replacing the cover plate 66. Operations such as replacing with a new one can be performed smoothly under atmospheric pressure.
[0038]
【The invention's effect】
As described above, according to the present invention, the cable can be quickly and smoothly passed through the ceiling of the latent work room where the atmospheric pressure difference between the outside and inside the box is large, and replacement and expansion of the cable can be performed very easily. And the configuration is simple.
[Brief description of the drawings]
FIG. 1 is an explanatory cross-sectional view showing a working chamber of a pressure latent air in which an apparatus of the present invention is implemented.
FIG. 2 is a cross-sectional view showing a first step according to the first embodiment of the invention.
FIG. 3 is a sectional view similarly showing a second step.
FIG. 4 is a sectional view similarly showing a third step.
FIG. 5 is a sectional view similarly showing a fourth step.
FIG. 6 is a cross-sectional view showing a fifth (final) step in the same manner.
7 is an enlarged view of the outer cable mounting bracket in FIG. 6. FIG.
FIG. 8 is an enlarged view of FIG. 5;
FIG. 9 is an enlarged view of FIG. 6;
FIG. 10 is a sectional view showing a first step according to the second embodiment of the invention.
FIG. 11 is a sectional view similarly showing a second step.
FIG. 12 is a sectional view similarly showing a third step.
FIG. 13 is a sectional view similarly showing a fourth step.
14 is a plan view of the fixed lid in FIG. 13;
15 is an enlarged cross-sectional view showing a socket of a fixed lid in FIG.
FIG. 16 is a separation explanatory view showing a coupling relationship between a socket, a nipple, and a coupler in the fixed lid.
FIG. 17 is an explanatory view of a hydraulic hose connecting coupler when connected.
FIG. 18 is an explanatory diagram of the hydraulic hose when the coupling coupler is coupled.
FIG. 19 is an explanatory view of a coupling coupler of a pneumatic hose.
FIG. 20 is a cross-sectional view of an electric wire insertion coupling metal fitting.
FIG. 21 is an explanatory cross-sectional view showing a conventional working chamber for pressurized air.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pressure air submersible 2 Work room ceiling 3 Upper opening 4 Lower opening 5 Upper lid 6 Lower lid 7 Cylindrical penetration metal fitting 8 Valve 9 Cable airtight penetration device 10 Inner cable attachment / detachment metal 11 Cable 11a Cable tip 12 External cable attachment metal fitting 12A Outer cable mounting bracket 13 Traveling rail 14 Excavator 15 Work chamber 16 Ground 17 Frame 18 Strut pipe 20 Loading plate 21 Fluid pressure jack 22 Displacement gauge 23 Pressure transducer 24 Hydraulic hose 25 Measurement cable 26 Measurement chamber 27 Remote hydraulic unit 28 Remote hydraulic unit controller 29 Latent measuring instrument 30 Personal computer 31 Printer 32 Cylindrical intermediate adjustment bracket 33 Flange 34 Flange 35 Bolt 36 Flange 37 Flange 38 Bolt 40 Connector 41 Connector 44 Valve 45 Valve 46 Upper opening 47 Flange 48 Franc Die 49 Bolt 50 Valve 57 Shoulder 58 Cylindrical shell 59 Airtight filler 60 Fixed lid 61 Bottom plate 62 Sleeve 63 Sleeve 65 Cylindrical body 66 Cover plate 67 Valve 68 Bolt 69 Female thread 70 Socket 71 Welding 72 Hydraulic hose 73 Nipple 74 Hydraulic pressure Male coupler 75 Opening 76 Opening 77 Spring 78 Spring 79 Valve body 80 Valve body 81 Projection 82 Projection 83 Pneumatic hose 84 Pneumatic male coupler 85 Opening 86 Opening 87 Spring 88 Spring 89 Valve body 90 Valve body 91 Projection 92 Projection 93 Electric wire 94 Female thread part 95 Connecting Bracket 96 Fixing Bracket 97 Fastening Bracket 98 Male Thread 99 99 Annular Packing 100 Washer

Claims (2)

In the pressurized latent cave 1, the upper and lower openings 3 and 4 are sealed by the lids 5 and 6, and the inside and outside of the box are connected through the box communication valve and the box communication valve. After removing the lower cover 6 of the cylindrical through metal fitting 7 capable of communication, the opening of the bottomed cylindrical attachment / detachment fitting 10 having the valve 8 is connected to the lower opening 4 in an airtight manner. The inside of the metal fitting 10 is at atmospheric pressure, the lid 5 at the top of the cylindrical through metal fitting 7 is removed, the valves 50 and 67 are provided in the upper opening 3, and the cable 11 is hermetically penetrated through the cable 11 12 and 12A are connected in an airtight manner, the lower part of the cable 11 is suspended in the box attachment / detachment bracket 10, the valve 8 of the box attachment / detachment bracket 10 is opened, and the air pressure in the sealed internal space is substantially equal to the box internal pressure. After this, the box internal fitting 10 is removed from the lower end of the cylindrical through fitting 7. Airtightness through the cables in the gas Sen凾 working chamber ceiling, characterized in that. The upper opening 3 located outside the box of the cylindrical through metal fitting 7 provided through the work room ceiling 2 in the pressurized air latent cage 1 has valves 50 and 67 and the cable 11 penetrates airtightly. The outer cable mounting brackets 12 and 12A are connected in an airtight and detachable manner, and have a valve 8 in the lower opening 4 located on the inner side of the cylindrical through bracket 7 and the lower portion of the cable 11 is hermetically sealed. A cable hermetic penetrating device in the ceiling of the pressure air latent work chamber, characterized in that a bottomed cylindrical box-mounting bracket 10 that can be housed in a box is hermetically and detachably coupled.

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