KR101605437B1 - Underground Power connection brackets - Google Patents

Abstract

The present invention relates to a connection bracket for underground transmission. Especially, the present invention relates to a connection bracket of underground transmission which can safely prevent a connection part of interconnected underground wires by making an operator to quickly react by transmitting a danger signal in advance not to disconnect the connection part by excessively tensioning the interconnected underground wire inside a manhole, and can prevent the underground wire wired inside from the whole loss by being burned down due to a fire by quickly suppress the fire through a fireplug in a fire area while notifying to a manager through wireless transmission when the fire occurs due to a short circuit inside the manhole.

Description

{Underground Power connection brackets}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection bracket for underground transmission among the submerged transmission technology, and more particularly, to a connection bracket for underground transmission, which is capable of effectively protecting an underground wire connected with a bolt- .

Generally, electricity used in each home, office and large-scale factory is supplied through a substation equipped for each region. This substation is installed for the purpose of modifying voltage and current and distributing power, The power generated by the power line will be sent through the transmission line.

The substations are usually installed on the ground. In such a substation, high-voltage currents must be transmitted. Most of the high-voltage cables are exposed to the outside. High-voltage cables exposed to the outside are short- And there is a problem of damaging the surrounding landscape due to the erroneously installed high-voltage electric wire, and high voltage electric wires are installed in the underground.

In this way, when a high voltage cable is installed in the underground, problems such as external interference and harsh environment are solved because the high voltage cable is not exposed to the outside, There is a problem that needs to be connected and used.

In the case of high-voltage wires, since the diameter of the high-voltage wires is considerably large due to the characteristic of supplying power at high pressure, bolts are fastened to each other in a state of being in contact with each other, and insulating tapes are wound around the joints.

Especially, since the high-voltage wires are connected to each other easily, when the ground is easily cooled as in winter, the inner copper wire and the outer surface of the inner wire are shrunk with rapid cooling to cause excessive tensile, There is a problem such as short-circuiting easily. In the past, there has been no means to notify in advance that such excessive tension is generated.

Meanwhile, the underground wire wired inside the manhole repeatedly generates tensile stress and shrinkage due to the temperature change. As a result, when a certain period of time elapses in the above state, A part is blown off, or a short circuit occurs, or a penetration water is introduced into the inside of the sheath which has lost its protective function due to aging, so that it is contacted with a conductor through which electric current flows. As a result, a ground- There is a problem that the fire is completely burned out, so that it is being actively researched to notify the operator promptly in case of fire and to suppress the fire.

Korea Patent Registration No. 10-0904917 (Jun. 19, 2009) 'Connection Bracket for Underground Transmission'

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a method and apparatus for preventing dangerous signals from being transmitted to a worker It is possible to safely protect the joint part of interconnected underground wires by allowing the operator to cope quickly. In case of a fire due to short-circuit or short-circuit inside the manhole, it notifies the manager through wireless transmission, So as to prevent the ground wire, which is wired inside, from being burned out due to fire, thereby preventing loss of the ground wire.

The present invention provides means for achieving the above object, which comprises a fixing table 11 having an insertion groove 11a opened at its top and fixed to a bottom surface of the fixing table 11, A support portion 10 having a pair of support pieces 12 having guide grooves 12a in a direction perpendicular to the surface of the substrate 10 and facing each other; A first cap 21 having a guide piece 21a to be inserted into the guide groove 21a so as to be reciprocally movable in the vertical direction of the fixing table 11 and a second cap 21 which is rotatably installed on the first cap 21 A second cap 22 having an injection hole 22a at an upper center thereof and a second cap 22 which is inserted into the ground through the injection hole 22a, (SC) covering and covering the joints of the first and second openings (L1, L2); A spring S which is fixed to the bottom surface of the protector 20 and whose other end is inserted into the insertion groove 11a of the protector 10 to elastically support the protector 20 in one direction; A switch 30 installed on the support piece 12 for detecting the movement of the protection member 20 to the restriction position; A fire detection sensor 40 installed inside the manhole 1 for detecting heat generated during a fire; A controller 50 for receiving a detection signal from the switch 30 to output an emergency signal, receiving a fire detection signal from the fire detection sensor 60, and outputting a fire hydrant operation signal; A transmission unit 60 that is controlled by the control unit 50 and wirelessly transmits an emergency signal and a fire detection signal from the control unit 50 to the outside; The fire extinguisher (71) is controlled to be operated by the fire hydrant operation signal of the control unit (50). The fire extinguisher is sprayed into the manhole (1) through the injection valve (71) 70); And a pair of rotating rollers (80) rotatably provided on side walls of the manhole (1) to guide the covering of the ground wires (L1, L2) so as not to be damaged;

The manhole cover 1 is sealed by a manhole cover 2. The manhole cover 2 is assembled in a state where the upper and lower covers 100 and 200 are screwed together in a state of being divided by the upper cover 100 and the lower cover 200 , A vent hole PH is formed in a wall surface perpendicular to the seating tongue DT of the lower cover 200 so that outside air can be introduced into the manhole 1, A plurality of lower cover through holes 210 are formed in the lower cover 200 and a lifting member 220 is installed in the lower cover 200. The lifting member 220 is formed in a shape of ∩, the lower protrusion 222 of the lower cover through the projection hole 212 formed in the (200) is adapted to be exposed to the lower portion, the lower end surface center of the lifting member 220 has a groove shape A spring groove 224 is formed in the spring groove 224, there is inserted the upper end of the lower spring 230, the lower end of the lower spring 230 is supported at the center bottom surface of the lower cover 200, the A plurality of vent holes 226 are formed in the lifting member 220 so as to correspond to the lower cover through holes 210 so that external air can flow through the lifting member 220. The lifting member 220 is fixed to the upper surface of the lower cover 200, A cylindrical shape disposed in a space between the lower cover 200 and the upper cover 100 Is provided with a lift guide (300), said lifting guides 300 and the bottom surface is sealed, the top is an open form, a part of the surface a closed bottom has a form of predetermined size holes, the lift guide 300 is not leaving the another one pairs of rod guide groove 310, the rod guide, and comprises a groove 310 is actuating rod 410 in a state where the operation rod 410 is interposed between the symmetrically in the radial direction, a kind of And the rod guide groove 310 is a groove which guides the rod guide groove 312 from the vertex home position 312 Steep slope portion 314, the engaging groove 316, the return passage portion 318, the gentle slope jidoe done in section 320 the steep slope portion 314 is relatively inclined with rapid than that of the gentle slope part 320 And is communicated with each other at the home position part 312 , and the operation rod 410 A portion the outer peripheral surface of the pressing rod 400 is formed to project symmetrically in the radial direction, the pressing rods 400 are inserted provided on the lift guide 300, the lower end of the pressing rod 400, the pressing rod (420) the protrusion is, in the pressing rod 420 is fitted an upper spring 430, the pressing rod 420 is exposed to the bottom through the bottom surface of the lift guide 300, and the exposed pressure rod (420 Is grounded at the center of the upper surface of the lifting member (220) .

According to the present invention, a tensile force generated by shrinkage of an underground electric wire in winter can be transmitted to a worker through a switch, a control unit, and a transmission unit so that a worker can quickly cope with it, can do.

In addition, since the underground wire connected by the bolt fastening is housed in the inside of the protection hole and the sealing agent is injected into the interior, it is possible to prevent the excellent or underground water from coming into contact with the joint part, .

1 is a perspective view of a connection bracket of an underground transmission according to the present invention.
FIG. 2 is a perspective view of a main portion of a connecting bracket of an underground transmission according to the present invention, which is extracted from a recess. FIG.
FIG. 3 is a block diagram showing interconnection relations among components of a connection bracket of an underground transmission according to the present invention.
4 and 5 are operational diagrams of connection brackets for underground transmission according to the present invention.
6 is an exemplary sectional view of a manhole cover constituting a connection bracket of an underground transmission according to the present invention .
Fig. 7 is an exploded perspective view of the main part of Fig. 6 ;
8 is an exemplary cross-sectional view showing another modification of the protector constituting the connection bracket of the underground transmission according to the present invention .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Before describing the present invention, the following specific structural or functional descriptions are merely illustrative for the purpose of describing an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention may be embodied in various forms, And should not be construed as limited to the embodiments described herein.

In addition, since the embodiments according to the concept of the present invention can make various changes and have various forms, specific embodiments are illustrated in the drawings and described in detail herein. However, it should be understood that the embodiments according to the concept of the present invention are not intended to limit the present invention to specific modes of operation, but include all modifications, equivalents and alternatives falling within the spirit and scope of the present invention.

As shown in FIGS. 1 to 3, the present invention includes a support 10 fixed to a bottom surface of a manhole 1 and guiding the protection 20 so that the protection 20 can be reciprocated vertically; A protector 20 installed to be vertically reciprocable on the support part 10 and protected by receiving underground wires L1 and L2 fastened by bolts to each other; A spring S which is fixed to the bottom surface of the protector 20 and whose other end is inserted into the insertion groove 11a of the protector 10 to elastically support the protector 20 in one direction; A switch 30 installed on the supporting piece 12 and turned on / off by a protective member 20 which is reciprocated vertically; A fire detection sensor 40 installed inside the manhole 1 for detecting heat generated during a fire; A control unit 50 receiving an operation signal from the switch 30 and outputting an emergency signal, receiving a fire detection signal from the fire detection sensor 60, and outputting an operation signal; A transmission unit 60 that is controlled by the control unit 50 and wirelessly transmits an emergency signal and a fire detection signal from the control unit 50 to the outside; A fire hydrant 70 for spraying the fire extinguishing liquid injected into the manhole 1 through the injection valve 71 and spraying the fire extinguishing liquid 70 into the fire area is provided with an injection valve 71 controlled to be operated by the operation signal of the control unit 50, )and; And a pair of rotating rollers 80 rotatably installed on the sidewalls of the manhole 1 and guiding the covering of the ground wires L1 and L2 so as not to be damaged, as shown in FIGS. 1 and 2. FIG.

The manhole (1) to be buried in the ground is made up of a concrete material, an upper portion is opened, and a manhole cover (2) is installed to be openable on the upper side and an underground cable L1 and L2, and a wiring tube 3 buried so as to be able to be wired.

The support portion 10 which is installed on the bottom surface of the manhole 1 and guides the protection hole 20 to be vertically reciprocable can include an insertion groove 11a having an upper opening, And a pair of supporting pieces 12 protruding from the upper surface of the fixing table 11 and having guide grooves 12a perpendicular to the inner surface of the fixing table 11 so as to face each other .

The protector 20 is installed in the support portion 10 so as to be vertically reciprocable so that the underground wires L1 and L2 fastened by bolts are received and protected by the guide piece 12a. A first cap 21 which is provided with a first end 21a and is reciprocally fixed in the vertical direction of the fixing stand 11; A second cap 22 which is rotatably installed on the first cap 21 so as to surround the ground wires L1 and L2 housed therein and has an injection hole 22a formed at an upper center thereof; And an encapsulant (SC) which is injected through the injection hole (22a) to cover and insulate the joints of the ground wires (L1, L2) connected to each other.

The fixing rods 21b and the fixing rods 22b corresponding to the fixing rods 21b are formed at the portions where the first and second caps 21 and 22 are folded and abutted to be mutually engageable.

A single rod (not specifically shown) is integrally formed on the bottom surface of the first cap 21 so as to project downward and to be loaded with a spring S on its outer circumferential surface.

In addition, the sealing agent (SC), which is injected into the interior through the injection hole (22a) to cover the joint portion and can be insulated, is hardened after a lapse of a predetermined time to maintain a predetermined elasticity, It is preferable to form it from silicon.

The guide pieces 21a protruding horizontally at both ends of the guide pieces 12a are horizontally protruded from the guide grooves 12a of the support pieces 12 in a plan view, So that it can be stably slid without being detached outwardly.

The spring S protrudes from the fixing base 11 of the supporting part 10 and is fixed to a single end of the protecting part 20 so as to elastically support the protecting part 20 in one direction.

A switch 30 is provided on the support piece 12 of the support portion 10 and the switch 30 is connected to a protective member 12 which is reciprocally moved between a pair of support pieces 12 by a normal limit switch (Not specifically shown) projected horizontally by the arm 20 are rotated around the axis to sense the movement of the protection member 20 to the restricting position.

In the case of the present embodiment, the restricted position means a position where the protector 20 is vertically lowered and the tensile force of the ground wires L1 and L2 is maximized.

Accordingly, when the switch 30 senses the protective member 20 moved to the limit position, the sensing signal output from the switch 30 is input to the control unit 50, and the control unit 50 receives the sensing signal And outputs the emergency signal to the transmission unit 60. The transmission unit 60 having received the emergency signal transmits the emergency signal to the central control room (not specifically shown) where the worker resides wirelessly, The state of the current ground wires L1 and L2 can be determined through the received emergency signal and can be quickly responded.

A fire detection sensor 40 is installed in the manhole 1. In the present embodiment, the fire detection sensor 40 is a conventional heat detection sensor. The fire detection sensor 40 detects excessive fire due to excessive shrinkage of ground wires L1 and L2 If a fire occurs due to electrical short circuit due to break of part of the conductor, or when the penetration water enters into the inside of the conductor which has lost its protective function due to aging, it contacts with the conductor through which electric current flows. The fire detection sensor 40 detects the heat of the high temperature, and the fire detection signal is transmitted to the controller 50.

The control unit 50 receives the fire detection signal from the fire detection sensor 40 and transmits a fire hydrant operation signal to the injection valve 71 of the fire hydrant 70 installed in the manhole 1, 71 so that the fire extinguishing liquid can be injected into the manhole 1, and at the same time, outputs a fire detection signal to the transmitter 60.

The inside of the fire hydrant 70 is filled with a fire extinguishing agent and compressed air or a non-combustible gas (nitrogen, carbon dioxide, halogen gas) liquefied at a high pressure, And an injection valve 71 for interrupting the outflow of the extinguishing agent and the incombustible gas.

In this embodiment, when the hydrant operation signal is inputted from the control unit 50, the inlet of the injection valve 71 is opened, and the extinguishing agent and the incombustible gas filled in the iron vessel are pressurized by the internal pressure of the injection valve 71 It is sprayed into the manhole 1 through the inlet to suppress the fire area for a moment, thereby minimizing the damage caused by the fire.

The control unit 50 receives the fire detection signal from the fire detection sensor 40 and transmits a fire hydrant operation signal to the injection valve 71 of the fire hydrant 70 installed in the manhole 1, (Fire extinguishing agent and nonflammable gas) can be injected into the manhole 1 through the fire extinguisher 71 and simultaneously outputs a fire detection signal to the transmitter 60. The transmitter 60 ) Wirelessly transmits a fire detection signal to a central control room (not specifically shown) where the worker resides, so that other wires wired in the manhole 1 are connected to the main control room It is possible to respond promptly to follow-up measures so as not to be burnt.

The pair of rotating rollers 80 for guiding the coating of the ground wires L1 and L2 are not damaged is a bracket having one end fixed to the inner wall of the manhole 1 and the other end projecting inwardly And a roller (not specifically shown) installed at the end of a bracket (not specifically shown) so as to idle.

Hereinafter, the operation of the present invention will be described.

As shown in FIGS. 4 and 5, in the seasons when the temperature changes little, that is, in spring and autumn, the underground wires L1 and L2 are fastened to each other, Is always kept elastically held by the spring (S) installed at the center of the support portion (10).

In winter, however, the copper wires forming the ground wires (L1, L2) and the covering wire surrounding the wires are contracted to generate tensile force, and the ground wires (L1, L2) connected to each other are pulled in opposite directions.

When the ground wires L1 and L2 are pulled in opposite directions to each other, the ground wires L1 and L2 are coupled to each other so that the protector 20 drawn into the inside is gradually lowered vertically along the support portion 10 And the spring S disposed on the bottom surface of the protector 20 is squeezed.

The guide piece 21a of the protection member 20 inserted into the guide groove 12a of the support portion 10 is vertically lowered by the tensile force generated in the underground wires L1 and L2 The manipulation piece (not specifically shown) of the switch 30 provided at the limit position of the support piece 12 is pressed against the lower protective cover 20 20, and the sensing signal is transmitted to the control unit 50.

The control unit 50 receives the detection signal of the switch 30 and outputs an emergency signal. The emergency signal is output to a central control room (specifically, a central control room The emergency signal is transmitted.

Accordingly, the operator can easily recognize the current state of the underground wires L1 and L2 through the received emergency signal, and can quickly follow-up.

On the other hand, the ground wires L1 and L2 wired in the manhole 1 repeatedly generate tensile stress and shrinkage as the temperature changes, so that stress is generated inside.

When a certain period of time has elapsed in the above-described state, a part of the lead wire is broken due to repeated tensile and contraction, and an electric short-circuit accident occurs, or the penetration water is introduced into the inside of the covered wire which has lost its protective function due to aging, As a result, a fire due to short-circuit and short-circuit occurs.

Therefore, when a fire occurs in the manhole 1 due to the electrical short circuit, the fire detection sensor 40 installed in the manhole 1 senses the heat generated in the fire and transmits a fire detection signal to the controller 50 The control unit 50 receives the fire detection signal from the fire detection sensor 40 and transmits a fire hydrant operation signal to the injection valve 71 of the fire hydrant 70 installed in the manhole 1, 71 so that the fire extinguishing liquid can be injected into the manhole 1, and at the same time, outputs a fire detection signal to the transmitter 60.

When the hydrant operation signal is input from the controller 50, the inlet of the injection valve 71 is opened. At this time, the extinguishing agent and the incombustible gas filled in the iron vessel are discharged through the inlet of the injection valve 71 to the manhole 1 ), And the fire area is suppressed instantaneously.

Further, the transmission unit 60, which receives the fire detection signal from the fire detection sensor 40, transmits a fire detection signal to a central control room (not specifically shown) where the worker resides wirelessly, It is possible to quickly respond to follow-up measures so that other wires wired in the manhole 1 are not burnt through the fire detection signal.

The pair of rotating rollers 80 provided on the sidewall of the manhole 1 and abutted against the ground wires L1 and L2 are idly rotated by the ground wires L1 and L2 to be moved outwardly, (L1, L2) is prevented from being damaged by the wiring tube (3) charged in the wall of the manhole (1).

Therefore, when the tension applied to the ground wires L1 and L2 is released, the protector 20, which has been pressing the spring S, is gradually discharged by the spring S and returns to the initial state.

6 and 7, the manhole cover 2 is modified so that the manhole 1 Breathe  It is possible to prevent a sudden change in the internal temperature and to remove the manhole cover 2 When  And can be easily and conveniently dismantled in a stable manner.

To this end, the manhole cover 2 is divided into an upper cover 100 and a lower cover 200, Screwed  .

Therefore, the manhole cover 2 is formed as an internal hollow shape unlike the conventional art.

Accordingly, since the weight of the conventional manhole cover 2 is significantly reduced compared to the existing manhole cover 2, Lifting  It is convenient, and the danger of safety accidents, Diminished All.

Particularly, in the manhole 1 Placement chin (DT) and  On the vertical wall, PH So that outside air can be introduced into the manhole 1. That is, the manhole 1 is a kind of breathing  Function. Summer / Winter season  The temperature difference can be reduced compared with the conventional temperature difference, which can prevent a sudden temperature change inside the manhole (1).

As well as , And a plurality of (not shown) The lower cover through hole 210  Because it is perforated Inside, outside  The distribution of air is considerably more liberal than in the past.

Further, inside the lower cover 200, Lifting member 220  , And the lifting member 220 is formed in a substantially " H " shape, The lower protrusion 222, Is formed on the lower cover 200 The projection hole 212  So as to be exposed downward.

Then, The lifting member 220 Bottom surface  In the center Concave Spring groove 224, Is formed, In the spring groove 224  The upper end of the lower spring 230 is inserted and the lower end of the lower spring 230 is inserted into the center of the bottom surface of the lower cover 200 Be supported .

Therefore, The lifting member 220  Unless there is a separate external force, On the back  It always comes up to the top.

As well as , remind The lifting member 220 also  remind The lower cover aperture 210 and  A plurality of ventilation holes 226 are formed correspondingly Inside, outside  So that air can be circulated.

The lower cover 200 is disposed in a space between the lower cover 200 and the upper cover 100 and fixed to the upper surface of the lower cover 200 Cylindrical The lifting guide 300  Respectively.

remind The lifting guide 300  The bottom surface is closed, the top is open, and some of the closed bottom surfaces have a certain size of perforated shape.

In particular, The lifting guide 300  As shown in Fig. 7, In the radial direction  Symmetrically The rod guide groove 310  , The rod guide groove 310 Operating road In a state where the deck 410 is fitted The actuation rod 410  And is a groove that guides a user to perform a kind of switch function without being separated.

To this end, The rod guide groove 310  Apex From the home position unit 312 scarp 314, [0035] (316), The return flow path (318), As the gentle slope portion 320  .

At this time, The steepening section 314  remind In the gentle slope part 320  And the relative slope is formed abruptly, In the home position unit 312  each other Communicate .

Then, the home position unit 312  remind The actuation rod 410  Without receiving an external force, Girl And is always positioned when it is not engaged with the rim groove portion 316.

together, The return flow path portion 318 and The gentle slope portion 320  remind The actuation rod 410  Smoothly The home position unit 312  Inducing Guide part .

In addition, The actuation rod 410 The pressure-  On a part of the outer circumference In the radial direction  Symmetrically protruding, The pressure bar 400  remind In the lifting guide 300  Inserted.

Therefore, The pressure bar 400  When pressed, The actuation rod 410  Relatively sloppy side The steepening portion 314  Riding Down Bend  Formed on site Girl And is caught by the rim groove portion 316.

which  In state The pressure bar 400  Once again, The actuation rod 410  Out of the engagement groove 316 The return flow path (318) and The gentle slope portion 320  Riding Home Forge And is returned to the seam 312.

Here, such an operation To be able  remind The actuation rod 410  According to the moving trajectory, The pressure bar 400  remind Lifting guide (300) In the radial direction  So that you can fully accommodate this movement. The pressing rod 400 and Lifting Guy A gap should be maintained between the first and second plates 300.

On the other hand, The pressure-  At the bottom Pressurizing rod 420  Protruded, Pressure furnace The upper spring 430 is fitted to the spring 420.

As well as , remind The pressurizing rod 420  remind The lifting guide 300  Exposed down through the bottom surface, exposed The pressure of the pressure rod 420 The end  remind The lifting member 220  And is grounded at the center of the upper surface.

At this time, the lower end of the upper spring 430 The lifting guide 300  On the floor Be supported .

Therefore, The pressure bar 400  By the upper spring 430 Upward Shout The upper part is raised to the upper part. However, The pressure- On the outer circumference  Protruding production The copper rod 410 In the rod guide groove 310  It is not detached and separated because it is caught while being restrained.

Incidentally, The pressure-  In the center On the outer circumference  Formed The intestinal pore 440 and year The central pore 442, The pressure of the pressure rod 420  Through the center Lifting portion A vent hole 226 formed in the center of the ash 220 To communicate  .

Therefore, the inside air and the outside air are controlled by the temperature difference The intestinal pore 440 and  Through the central pore 442 and the vent hole 226 To be distributable  do.

As well as , A part of the periphery of the upper cover 100 The upper cover vent hole 110  And The pressure bar 400  And is exposed to the upper side of the upper cover 100 through the upper surface center of the upper cover 100.

In particular, The pressure-  The exposed top Diameter  Bigger Curved The head 450, The rainwater is well Flow  .

Further, the upper surface of the upper cover 100 is also covered with rainwater Flow  Angle from center to allow End  toward Taper  Processed.

Incidentally, in a part of the circumference of the lower cover 200 Takeout Home (TRC)  Can be further formed, Lifting  To facilitate this, If necessary  It becomes a fitting groove used when lifting the lever.

Accordingly, when it is necessary to lift the manhole cover 2, the operator has to move the head portion 450 protruding from the center Tread on foot .

then, The pressure bar 400  Descending The pressurizing rod 420 Lifting member 220  Push down, The actuation rod 410 The rod guide groove 310  I ride.

At the same time, The lifting member 220 The lower protrusion 222  Protruding downward Seated chin (DT) And, In reaction  The manhole cover 2 is raised.

In this case, Only the head part 450  Should be pressed.

During this process The pressure bar 400  When it goes down to a certain extent The actuation rod 410  And is caught by the latching groove portion 316.

Then, the manhole cover 2 is considerably lifted up, Operating road The manhole cover 2 maintains the state as long as no external force is applied thereto.

Therefore, the operator can easily grasp the state where the manhole cover 2 is easily separated Put  So that it can be easily separated by using a tool or lever.

In addition, in the present invention, as shown in FIG. 8, by further improving the structure of the protector 20, L1, L2 ) Mutual  Assembly can be made easier.

That is, in the case of the example shown in FIG. 1, bolts are required to be fastened between the underground wires, which is troublesome and time consuming. However, In the improved example  It is very convenient to simply put the ground wire in the protection hole 20 and to finish the assembly easily.

To this end, in the present invention, L1, L2 ) Is processed separately Hookgirl Thereby forming the rim portion 500.

Then,  Inside the protection hole 20, Slidable  A pair of connecting conductors 510 are connected to each other Face to face  .

At this time, The connecting conductor 510  The surfaces that come into contact with each other have curvature Curved jean  Should be in the form.

In addition, The connection conductors 510  On the outer side The hook engagement groove 520  .

In this case, The hook engagement groove 520  The entrance To be magnificent  And Hook hook It is preferable to facilitate entry of the part 500.

As well as , remind The connection conductors 510  On each outer surface, a conductive spring 530 Tangji The conductive spring 530 The other end  The protective cover (20) On my wall  And is locked.

Therefore, Connecting conductor The pair of electrodes 510 are always kept in contact with each other, The hook securing portion 500  Each underground wire ( L1, L2 ), It is possible to wire the wire easily and quickly.

One; Manhole 10: Support
20: Protector 30: Switch
40: a fire detection sensor 50:
60: Transmission unit 70: Fire hydrant
80:

Claims (1)

A fixing table 11 having an insertion groove 11a with an upper portion opened and fixed to a bottom surface of the fixing table 11 and a guide groove 12a perpendicularly protruding from the upper surface of the fixing table 11, A support portion (10) having a pair of support pieces (12) arranged so as to face each other; A first cap 21 having a guide piece 21a to be inserted into the guide groove 21a so as to be reciprocally movable in the vertical direction of the fixing table 11 and a second cap 21 which is rotatably installed on the first cap 21 A second cap 22 having an injection hole 22a at an upper center thereof and a second cap 22 which is inserted into the ground through the injection hole 22a, (SC) covering and covering the joints of the first and second openings (L1, L2); A spring S which is fixed to the bottom surface of the protector 20 and whose other end is inserted into the insertion groove 11a of the protector 10 to elastically support the protector 20 in one direction; A switch 30 installed on the support piece 12 for detecting the movement of the protection member 20 to the restriction position; A fire detection sensor 40 installed inside the manhole 1 for detecting heat generated during a fire; A controller 50 for receiving a detection signal from the switch 30 and outputting an emergency signal, receiving a fire detection signal from the fire detection sensor 60, and outputting a fire hydrant operation signal; A transmission unit 60 that is controlled by the control unit 50 and wirelessly transmits an emergency signal and a fire detection signal from the control unit 50 to the outside; The fire extinguisher (71) is controlled to be operated by the fire hydrant operation signal of the control unit (50). The fire extinguisher is sprayed into the manhole (1) through the injection valve (71) 70); And a pair of rotating rollers (80) rotatably provided on side walls of the manhole (1) to guide the covering of the ground wires (L1, L2) so as not to be damaged;
The manhole cover 1 is sealed by a manhole cover 2. The manhole cover 2 is assembled in a state where the upper and lower covers 100 and 200 are screwed together in a state of being divided by the upper cover 100 and the lower cover 200 , A vent hole PH is formed in a wall surface perpendicular to the seating tongue DT of the lower cover 200 so that outside air can be introduced into the manhole 1, A plurality of lower cover through holes 210 are formed in the lower cover 200 and a lifting member 220 is installed in the lower cover 200. The lifting member 220 is formed in the shape of an ∩ ' The protruded lower protrusion 222 is exposed through the protrusion hole 212 formed in the lower cover 200 and is exposed downward. The center of the lower end of the lifting member 220 is formed with a concave A spring groove 224 is formed in the spring groove 224, there is inserted the upper end of the lower spring 230, the lower end of the lower spring 230 is supported at the center bottom surface of the lower cover 200, the A plurality of vent holes 226 are formed in the lifting member 220 so as to correspond to the lower cover through holes 210 so that external air can flow through the lifting member 220. The lifting member 220 is fixed to the upper surface of the lower cover 200, A cylindrical shape disposed in a space between the lower cover 200 and the upper cover 100 Is provided with a lift guide (300), said lifting guides 300 and the bottom surface is sealed, the top is an open form, a part of the surface a closed bottom has a form of predetermined size holes, the lift guide The rod 300 includes a pair of rod guide grooves 310 symmetrically to each other in the radial direction and the rod guide groove 310 is formed in a state in which the rod 410 is not detached the grooves for guiding to perform a type of switching function, the rod guide groove 310 from the top of the home position 312 Steep slope portion 314, the engaging groove 316, the return passage portion 318, the gentle slope jidoe done in section 320 the steep slope portion 314 is relatively inclined with rapid than that of the gentle slope part 320 And is communicated with each other at the home position part 312 , and the operation rod 410 Symmetrically on some outer circumferential surface of the pressing rod 400 in the radial direction is formed to project, the pressing rod 400 is installed into the said lifting guides (300), the lower end of the pressing rod 400, the pressing rod (420 ) it is projected and, in the pressing rod 420 is fitted an upper spring 430, the pressing rod 420 is exposed to the bottom through the bottom surface of the lift guide 300, the rod exposed pressure ( 420) is grounded at the center of the upper surface of the lifting member (220) .

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