KR102410313B1 - A circle manhole cover with portable hydraulic cylinder of switchgear open and close - Google Patents

Abstract

The present invention is a circular manhole cover that is seated in an opening for equipment or people to enter and exit to a sewage pipe buried on one side of a sidewalk or a driveway, comprising: a frame seated in the opening; a cover mounted to open and close the opening at the upper side of the frame; an open arm that is seated on the frame and rotates, and a power transmission box with a built-in power transmission unit fastened to rotate the open arm; a portable hydraulic opening device fastened to an upper portion of the power transmission box; a portable hydraulic pressure generating device coupled to a portable opening device for opening and closing the cover; It is seated on the frame and characterized in that it is composed of a hinge part for opening and closing the cover,
The inner periphery of the opening of the sewage pipe is provided with a frame formed in multiple stages to prevent foreign substances from entering the inside, so that the cover can be opened and closed safely and easily without obstacles when opening. It can be opened and completely opened, and a portable hydraulic opening device that opens and closes the cover on the outside of the frame is connected with a portable hydraulic pressure generator so that the cover can be easily opened and closed without an external power source, and a safety fence is easily installed It is possible to prevent a safety accident in advance, and to prevent rotation of the cover, there is an effect of preventing wear caused by friction between the cover and the frame.

Description

A circle manhole cover with portable hydraulic cylinder of switchgear open and close}

The present invention relates to a circular manhole cover that can be opened and closed by a portable hydraulic switchgear, and more particularly, provided with a cover on a frame formed in multiple stages to prevent foreign substances from entering the inner periphery of an opening of a sewage pipe to the inside, so that a cover is provided between the frame and the cover. The cover can be easily opened and closed without any obstacles by preventing foreign substances from adhering to the inside, and an opening arm that opens the cover can be provided to partially open and fully open the cover while rotating the cover up and down, and to the outside of the frame. A portable hydraulic switchgear that opens and closes the cover is mounted on the upper part of the power transmission box to be seated, and the cover can be easily opened and closed by fastening with the portable hydraulic pressure generator. It relates to a circular manhole cover that is convenient to open and close with a portable hydraulic switchgear that can reduce wear and tear.

As is well known, where a large amount of water is used in places where humans live and engage in production activities, domestic sewage and industrial wastewater are increasing day by day. Rainwater flows into the sewer pipe, and in this case, not only domestic sewage flowing in the sewer pipe, but also floating matter or soil carried in the sewage that is washed away with the rainwater accumulates naturally, or the flow rate is slowed in a curved pipe or expanded pipe, etc. will be deposited

As such, in any case, the sewage pipeline is very important as urban and industrial activities become more active. It is an essential element in the creation of an urban environment. As the amount of sediment increases, the sewage pipeline gradually becomes clogged. In order to prevent damage, the installation and maintenance of sewage pipes should be easy.

In the upper part of the sewer pipe, manholes installed in public roads, sidewalks, and citizen parks around rivers are often seen, and there are a round manhole cover with a circular cover and a square manhole cover with a rectangular cover.

The round manhole cover is mainly used for the upper part of the branch pipe with a small size of the sewage pipe, and the square manhole cover is mainly used for the large-capacity collecting pipe where the sewage of the branch pipe joins.

Manholes as described above are often installed on sidewalks, bicycle paths near roads and rivers, and parks and green areas. They should be installed easily and safely for dredging sludge accumulated in sewage pipes or for maintenance of sewage pipes using the manholes. In particular, in the case of a circular manhole, the risk of a fall accident is very high due to the frequent movement of people or vehicles when the cover is opened due to the nature of being installed in general roads or in areas where people frequently enter and exit residential and commercial buildings. The need to develop a manhole equipped with a quick opening and safety device is emerging.

Figure 16 is a schematic view showing a conventional circular manhole cover, the cover (2) is seated on the cover frame (1) on the upper portion of the opening formed in the sewage pipe.

However, the conventional circular manhole cover does not have a step between the cover and the cover frame, so foreign substances are introduced and the foreign material is compacted by the movement of a vehicle, etc. Due to the method in which the cover has to be completely separated from the frame, there is a risk of safety accidents and a lot of inconvenience in quick inspection and maintenance and repair of sewage pipes.

In order to improve the above problems, the applicant of the present invention released and patented a multifunctional safety manhole cover to improve the square box-shaped manhole cover, and the multifunctional manhole cover is, as shown in FIG. A box-shaped cover frame seated in the opening and having an open inside, a cover that opens and closes the opening and is seated on the cover frame, and a hinge pin moving device having a rotational opening and locking function and a separating function to open the cover; , a cover frame that can be opened without the help of heavy equipment, an inspection port detachable to inspect the sewage pipe, and a safety net to prevent an accident from falling into the opening when the cover is opened, so that the cover can be safely opened and closed on the cover frame, , When opening and closing the cover of a heavy object, it can prevent damage from physical shock in advance, prevent foreign substances from entering the gap between the cover and the cover frame, and inspect the sewage pipe very easily without opening the cover. In addition, the cover can be opened conveniently, and when the cover is opened, it has the effect of preventing a fall accident in advance and using it safely.

However, the prior art has a problem in that it takes a lot of time to open and close the cover by combining various opening tools, and in the case of a circular manhole cover, there was a problem in applying the technique in the structure of the manhole cover.

The present invention was created in consideration of the disadvantages of the prior art as described above, and the present invention is provided by providing a cover on a frame formed in multiple stages to prevent foreign substances from entering the inner periphery of an opening of a sewage pipe to the inside, thereby providing a cover and a frame The cover can be opened and closed safely and easily without any obstruction to the opening because foreign matter is not accumulated between It is mounted on a power transmission box provided on one side and connected to a portable hydraulic switchgear that opens and closes the cover so that the cover can be easily opened and closed while moving. It is to provide a circular manhole cover that can be used safely for a long time while preventing abrasion of the frame and cover caused by it, and is a portable hydraulic switchgear that can easily open and close the cover of a heavy object.

The present invention is a means for achieving the above object, and the circular manhole cover that opens and closes with a portable hydraulic switchgear according to the present invention is seated in an opening for equipment or people to enter into a sewage pipe buried on one side of a sidewalk or driveway. In the circular manhole cover to be used, a ring-shaped opening seating portion to be seated on the outer periphery of the opening, a cover seating portion extending upwardly of the opening seating portion and having a multi-stage engaging protrusion formed therein, and a rear surface of the cover seating portion a frame formed with opening/closing mounting holes penetrating on both sides and hinge mounting holes recessed from the upper side to the lower side of the rear surface of the cover mounting unit; a cover having an inclined seating portion in close contact with the cover seating portion to open and close the opening at the upper side of the frame; an opening arm that is seated in the opening and closing fitting of the frame to rotate the cover; a power transmission box having a space formed therein so that the power transmission unit fastened with the open arm is inside from one side of the outside of the frame and provided with a box cover on the upper side; a portable hydraulic switch operated by connecting a hydraulic cylinder with a portable hydraulic pressure generator so as to open and close the cover by connecting the power transmission unit while carrying the box cover of the power transmission box; One side is fastened to the hinge mounting hole of the frame, and the other side is integrally connected with the hinge provided in the cover, characterized in that it is composed of a hinge part for opening and closing the cover.

A guide rail that is recessed and detached from one side to the other side is formed on the inside of the cover so that the open arm is slid back and forth, and a slide incision cut on both sides to prevent the separation of the open arm and to guide the guide rail is formed in front of the guide rail. is formed, and guide rail fastening parts for attaching and detaching the guide rail with bolts are formed on both sides of the guide rail on the inside of the cover.

The open arm is seated on both sides of the opening/closing fitting of the frame and is coupled with the power transmission unit and rotated to open and close the cover while rotating, and one side is engaged with the shaft and rotates up and down, and the other side is a moving incision part A bar-shaped main arm is formed, one side of the moving arm is rotated along the moving cutout of the main arm, and a moving groove is formed to move back and forth, and the moving arm is seated in the concave portion formed on the other side of the moving arm to move along the slide cutout of the cover. It is characterized in that a guide roller connected with a pin, a moving arm replacement pin for mutually fastening the main arm and the moving arm, and a moving arm restraining pin for controlling the movement of the moving arm are provided.

The portable hydraulic switchgear includes a hydraulic cylinder case having an open lower side so as to be seated on the upper part of the power transmission box, and a cylindrical cylinder body having a hydraulic hose connector inside the hydraulic cylinder case to be connected to a portable hydraulic pressure generator; A moving piston reciprocally moved by the hydraulic pressure supplied from the inside of the cylinder body, and a piston connecting ring is coupled to an end of the moving piston and a piston connecting pin protruding so as to be engaged with the piston connecting ring is provided on the lower side, and one end of the shaft and It is characterized in that it is composed of a power transmission unit having a spline connection groove provided with a plurality of grooves on the inside so as to be detachably engaged with each other.

The hydraulic hose connector of the portable hydraulic switchgear is protruded and fastened to the upper and lower sides of the cylinder body to convert the hydraulic pressure generated from the portable hydraulic pressure generator in the forward and reverse directions via the direction switching valve to drive the moving piston to rotate the power transmission unit It is characterized in that it is configured to open and close the cover by transmitting the rotational force to the shaft coupled to the power transmission unit to rotate the open arm fastened to the shaft up and down.

The hinge portion includes a frame hinge in which a pin-shaped main pin is connected to the hinge mounting hole of the frame and a perforation is formed before and after the main pin so that one side is rotatably connected, and the other side of the frame hinge has a pin shape. of the sub-pins are connected, and a cover hinge is connected to the sub-pins to sequentially open the cover 180 degrees.

A plurality of anti-rotation protrusions protruding to prevent the cover from rotating when seated are provided inside the cover seating portion of the frame, and the front inner periphery of the cover is opposed to the anti-rotation protrusion to prevent the cover from rotating A concave anti-rotation seating hole is formed, and on the outer periphery of the seating part of the cover, as the cover is opened and closed, it is in close contact with the inside of the frame and protrudes to prevent shaking even from a physical impact. .

The circular manhole cover opened and closed by a portable hydraulic switchgear according to the present invention having the above configuration has the following effects.

First, the frame formed in multiple stages on the inner periphery of the opening of the sewage pipe is provided with a cover to prevent foreign substances from entering, thereby preventing foreign substances from accumulating between the cover and the frame. Can be opened and closed easily.

Second, by providing an opening arm for opening the cover on the inside of the cover and the frame, the cover can be partially opened and completely opened in a link interlocking manner while moving the cover up and down.

Third, a power transmission box is provided on one side of the outer side of the frame, and the cover can be easily opened and closed by fastening a portable hydraulic switchgear on the upper side, and a separate external power source is used while moving with the portable hydraulic switchgear and the portable hydraulic power generating device. Multiple covers can be opened and closed without accompanying.

Fourth, a lock nut is provided inside the frame to prevent the opening of the cover by fastening the bolt, and a rotation preventing protrusion protruding inside the frame is provided to prevent the cover from rotating, resulting in friction between the cover and the frame. It can be used to prevent abrasion caused by it.

Fifth, it is possible to prevent a safety accident due to a pedestrian's foot jam in advance by providing a hinge part that is rotated 180 degrees without external protrusion of the rotation shaft on one side of the cover and the frame.

Sixth, it is possible to prevent accidents in which pedestrians and workers fall into the sewage pipe when the cover is opened for a long time for maintenance and inspection of the sewage pipe by installing a safety fence that blocks the opening while being detachable from the upper part of the frame.

Seventh, it is possible to secure the maximum amount of entry and exit space by simply installing the safety ladder vertically on the inside of the frame and the safety fence, so that the operator can safely enter and exit the sewer pipe.

1 is a circular manhole cover that opens and closes with a portable hydraulic switch according to the present invention;
installation appearance.
Figure 2 is a circular manhole cover that opens and closes with a portable hydraulic switch according to the present invention;
Installation schematic diagram of portable hydraulic switchgear.
Figure 3 is a circular manhole cover that opens and closes with a portable hydraulic switch according to the present invention.
Partially open.
4 is a circular manhole cover that opens and closes with a portable hydraulic switch according to the present invention;
Fully open state.
5 is a circular manhole cover that opens and closes with a portable hydraulic switchgear according to the present invention;
Detail view showing the cover.
6 is a circular manhole cover that opens and closes with a portable hydraulic switch according to the present invention;
A state diagram showing the frame.
7 is a circular manhole cover that opens and closes with a portable hydraulic switch according to the present invention.
State diagram showing the opening arm assembly, hinge and portable hydraulic switchgear.
8 is a circular manhole cover that opens and closes with a portable hydraulic switch according to the present invention;
A schematic diagram showing the fastening state of the portable hydraulic switchgear.
9 is a circular manhole cover that opens and closes with a portable hydraulic switch according to the present invention;
An exploded detail view showing a portable hydraulic switchgear and a power transmission box.
10 is a circular manhole cover that opens and closes with a portable hydraulic switch according to the present invention.
Cross section showing locking and unlocking.
11 is a circular manhole cover that opens and closes with a portable hydraulic switch according to the present invention.
State diagram showing the manual opening state.
12 is a circular manhole cover that opens and closes with a portable hydraulic switch according to the present invention.
State diagram showing the operation sequence of the hinge.
13 is a circular manhole cover that opens and closes with a portable hydraulic switch according to the present invention;
A state diagram showing the safety fence.
14 is a circular manhole cover that opens and closes with a portable hydraulic switch according to the present invention.
A state diagram of the safety fence and safety ladder installed.
15 is a circular manhole cover that opens and closes with a portable hydraulic switch according to the present invention.
Combination diagram of a portable hydraulic switchgear and a portable hydraulic pressure generator.
Figure 16 is a state diagram showing the shape and cross section of the existing circular manhole cover.
Figure 17 is a schematic diagram showing the patented safety manhole cover of the present application.

Hereinafter, a preferred embodiment of a circular manhole cover that is opened and closed by a portable hydraulic switchgear according to the present invention will be described in more detail with reference to the accompanying drawings.

As shown in FIGS. 1 to 4, the circular manhole cover opened and closed by the portable hydraulic switchgear according to the present invention is a sewage pipe buried on one side of a sidewalk or a roadway, and has a circular shape that is seated in an opening for equipment or people to enter and exit. As a manhole cover, a frame 10 seated on the outer periphery of the opening, a cover 20 that opens and closes the opening from the upper side of the frame 10, and an opening arm that opens and closes the cover 20 in a sequential interlocking manner The said 30 and the power transmission box 40 provided with a space formed so that the open arm said 30 is fastened on the outer side of the frame 10, and the inside of the power transmission box 40 is open A power transmission unit 50 fastened to the armpit 40, a portable hydraulic switchgear 60 for opening and closing the cover 20 by opening and closing the upper portion of the power transmission box 40, and the cover It consists of a hinge portion 70 that partially and fully opens 20 .

4 and 6, the frame 10 has an opening seating part 11 formed in a ring shape to be seated on the outer periphery of the opening, and a multi-stage locking jaw extending upward from the opening seating part 11 on the inside. The formed cover seating portion 12, the opening and closing mounting holes 13 provided to penetrate both sides of the rear surface of the cover seating portion 12, and the hinge mounting holes recessed from the upper side to the lower side of the rear surface of the cover seating portion 12 (14) is formed.

3 and 5 to 7, the cover 20 opens and closes the opening at the upper side of the frame 10, the outer periphery of the inclined seating portion 21 is inclined so as to be in close contact with the cover seating portion 12 is formed, and inside the cover 20, a guide rail 22 is recessed from the center to one side so that the open arm 30 slides back and forth, and is seated, and the open arm is at the front of the guide rail 22. Slide incisions 23 cut on both sides are formed to guide while preventing separation of the sei 30, and the guide rollers 35 of the open arms 30 are fastened to the inside of the slide incisions 23. A guide rail fastening part 24 for attaching and detaching the guide rail 22 with a bolt to the inside of the cover 20 is formed on both sides of the guide rail 22 .

4 and 7 to 8, the open thumb 30 is provided with a shaft 31 that is provided with a spline 31a formed on one side and rotates up and down, and the main arm rest is provided at the center of the shaft 31. The connector 32 is fastened, and one side of the main arm to the connector 32 is fastened with the female fastening bolt 32a and the other side slides back and forth so that the movable cutout 33a is formed. , a moving arm rest 34 having a moving groove 34a so that one side is rotated along the moving cutout 33a of the main arm unit 33 to move back and forth, and a concave portion formed on the other side of the moving arm stand 34 . It is seated and consists of a guide roller 35 connected with a pin so as to move along the slide cutout 23 of the cover 20, and one side of the movable cutout 33a of the main arm 33 and the movable arm member 34 ) is provided with a moving arm replacement fastening pin 37 for mutually fastening the moving groove 34a, and a moving arm stand restraining pin 36 for controlling the movement of the moving arm stand 34 .

3 and 7 to 8, the power transmission box 40 is provided with a box cover 41 in which a space is formed so that the power transmission unit 50 for transmitting power to the inside of the frame 10 is embedded. , The upper side of the power transmission unit 50 is provided with a piston connecting pin (50a) connected to the piston connecting ring (64a) fastened to the end of the moving piston (64) of the portable hydraulic switch (60), the lower side A spline connection groove (50b) is provided so that the spline (31a) is connected.

The portable hydraulic switch 60 includes a hydraulic cylinder case 61 whose lower side is opened so as to be seated by being fastened with a bolt to the upper portion of the power transmission box 40 , and a pin-shaped cylinder on the upper side of the hydraulic cylinder case 61 . A cylindrical cylinder body 63 provided with a hydraulic hose connector 62 to be connected with a portable hydraulic pressure generating device 100 that is fastened together with a fastening pin 61a and generates hydraulic pressure to the outside, and the cylinder body 63 The moving piston 64 reciprocally moved by the hydraulic flow supplied from the portable hydraulic pressure generating device 100 from the inside, the piston connecting ring 64a fastened to the end of the moving piston 64, and the moving piston 64 ) is provided with a piston connecting pin (50a) protruding on the upper side to be fastened, and a plurality of grooves on the inside to be detachably engaged with the spline (31a) provided on one side of the shaft (31) of the open arm (30) on the lower side. The formed spline connection groove (50b) is formed and the rotating power transmission unit (50) is connected.

In addition, the hydraulic hose connector 62 of the portable hydraulic switch 60 protrudes to the outside of the cylinder body 63, and the front hose connector 62a and the rear hose connector 62b through which hydraulic flow flows in and out are fastened, Portable hydraulic pressure generating device 100 provided with a direction switching valve 110 for switching the flow direction of hydraulic flow so that the front hose connector 62a and the rear hose connector 62b are interlocked to open and close the cover 20 It is formed by binding with

10 and 12, the hinge part 70 is provided with a pin-shaped main pin 72 on one side of the hinge frame 71 that is seated on the hinge mounting hole 14 of the frame 10, and a sub-type on the other side. The frame hinge 73 to which the pin 74 is fastened is fastened to one side, and the cover hinge 75 fastened to the sub-pin 74 on the other side of the frame hinge 73 is sequentially fastened so that the cover 20 is connected to the frame. In (10), it is formed so that 180 degrees can be opened without external protrusion of the rotating shaft.

3 to 10 and 11, a lock nut 16 having a screw formed therein is provided on the inside of the front side of the frame 10 so that a lock bolt 17 for fixing the cover 20 is seated, A bolt seating hole 28 is formed opposite to the lock nut 16 to seat the lock bolt 17 on the front upper side of the cover 20, and the upper side of the bolt seating hole 28 is manually An eye bolt 29 to be mounted upon opening and closing is provided, and a recessed cover fixing groove 27 is provided at the rear of the cover 20 so that when the cover 20 is closed, the locking protrusion 18 of the frame 10 is It is closely attached to the cover fixing groove (27) and is formed to firmly fix the cover (20) by fastening the lock bolt (17) to the lock nut (16) of the frame (10). On the lower side, when the cover 20 is opened and closed, the lower side is provided with a cover guide jaw 19 that protrudes obliquely so that the lower side is seated in a fixed position to guide the frame 10 while preventing interference.

In addition, anti-rotation protrusions 15 protruding to prevent the cover 20 from rotating when seated are provided on both sides of the front inner side of the frame 10, and on both sides of the inner front outer periphery of the cover 20, the The anti-rotation protrusion 15 is seated so that the cover 20 is prevented from being rotated so that the anti-rotation seat 25 is formed opposite to the anti-rotation protrusion 15 to prevent the rotation of the cover 20 and the frame 10. It is formed to prevent rotation, prevent friction, and thereby prevent wear.

On the outer periphery of the inclined seating part 21 of the cover 20, the cover 20 is in close contact with the inner side of the frame 10 as the cover 20 is opened and closed, and protrudes to prevent shaking even from a physical impact. Several gap maintaining protrusions 26 is formed

13 and 14, a safety fence 80 is installed on the upper portion of the frame 10 to ensure the safety of pedestrians and workers when the cover 20 is opened for a long time for maintenance and inspection of the sewage pipe, and the safety The fence 80 has a safety fence frame 81 provided with an angle-shaped fence seating hole 81a on the upper portion of the cover seating portion 12 of the frame 10 to restrict left and right movement, and the length at the rear thereof The length adjustment clip 83, which is controlled, is firmly fastened to the shaft 31 of the open arm 30, and the front is the fence fastener 82 seated on the frame 10, and the fence fastener bolt 85. It is firmly fastened to the lock nut 16 provided in the frame 10 with the help of a lock nut 16, and the front of the safety fence frame 81 is provided with an entrance door 84 that opens and closes to ensure safety when an operator enters and exits the sewer pipe.

In addition, a portable safety ladder 90 used by fastening the connecting ring 91 to the shaft 31 to prevent a worker from falling when entering and exiting the sewage pipe is vertically installed inside the safety fence 80 .

The operation of the circular manhole cover for opening and closing the cover with the portable hydraulic switchgear 60 according to the present invention configured as described above is as follows.

As shown in FIGS. 1 to 4, the circular manhole cover opened and closed by the portable hydraulic switchgear 60 according to the present invention is a sewage pipe buried on one side of a sidewalk or road, and is seated in an opening for equipment or people to enter and exit. As a circular manhole cover that becomes a circular manhole cover, the circular frame 10 is seated on the outer periphery of the opening, the cover 20 covering the upper side of the frame 10 opens and closes the opening, and the inside of the frame 10 The open arm 30 is seated on the to open and close the cover 20, and the power transmission box 40 having a space formed thereon is seated on one side of the outside of the frame 10, and the power transmission box 40 is opened. Then, a portable hydraulic switch 60 for opening and closing the cover 20 is provided so that the cover 20 can be conveniently opened and closed by connecting with the portable hydraulic pressure generator 100, and the frame 10 and the cover ( 20) is provided with a hinge portion 70 for hinge-connecting, so that the cover 20 is completely opened 180 degrees without protrusion of the normal rotation shaft.

That is, as shown in FIGS. 4 and 6 , the frame 10 is provided with a ring-shaped opening seating part 11 to be seated on the outer periphery of the opening, and to the upper side of the opening seating part 11 . It extends to form a cover seating portion 12 in the shape of a multi-stage clasp on the inside, and opens and closes the cover 20 while closely adhering to the inside thereof. 13) is formed, the open armpits 30 are connected, and the hinge mounting hole 14 recessed from the upper side to the lower side of the rear surface of the cover mounting part 12 is formed, so that the hinge part 70 is seated.

4 and 5 to 10, the cover 20 opens and closes the opening at the upper side of the frame 10, the outer periphery is inclined inwardly inclined seating portion 21 is formed in the frame 10 It is safely seated in close contact with the cover seat 12 .

That is, on the inside of the cover 20, a guide rail 22 recessed from the center to one side and seated is formed so that the open arm 30 is easily slid back and forth, and the front of the guide rail 22 is on both sides. The slide incision 23 is formed to guide safely while preventing the detachment of the open arm otsay 30, and the guide roller 35 of the open arm otsay 30 is inside the slide incision 23. ) is guided so that the cover 20 can be easily opened and closed.

In addition, guide rail fastening parts 24 for attaching and detaching the guide rail 22 with bolts to the inside of the cover 20 are formed on both sides of the guide rail 22 so that the guide rail 22 may be damaged by a physical impact. In this case, it can be conveniently detached for repair and replacement.

4 and 6, the open arm assembly 30 is seated in the opening/closing mounting hole 13 of the frame 10, and a shaft 31 to which the main arm-to-arm connector 32 is fastened is provided in the center, and the The main arm unit connector 32 has the main arm unit 33 fastened together with the arm replacement bolt 32a and rotates to sequentially open and close the cover 20 in a link interlocking manner.

In addition, the bar-shaped main arm rest 33 having one side connected to the shaft 31 and rotating up and down is formed with a moving cutout 33a so that the other side slides back and forth, so that the main arm rest 33 moves on one side. The moving arm rest 34 having a moving groove 34a is connected to move it back and forth while rotating along the cutout 33a and is moved back and forth while rotating, and is seated in the concave portion formed on the other side of the moving arm unit 34 and the cover A guide roller 35 connected with a pin is provided so as to move along the slide cutout 23 of the 20 to open and close the cover 20 while easily rotating it up and down.

At this time, a moving arm replacement pin 37 for mutually fastening through the moving cutout 33a of the main arm 33 and the moving groove 34a of the moving arm 34 is provided to completely open the cover 20. In this case, the moving arm arm restraint pin 36 is separated and the moving arm arm 34 is moved while rotating, thereby completely opening the cover 20, and when closing the cover 20, the moving arm arm restraining pin 36 is returned to its original position. By re-fastening, the distance between the main arm arm 33 and the moving arm arm 34 is limited only as much as the distance of the moving groove 34a, and the angle is also changed, so that the cover 20 is prevented from being detached and the full opening of 180 degrees is made. do.

7 and 8, a space is formed inside the outer side of the frame 10 so that the power transmission unit 50 is embedded therein, and a power transmission box 40 provided with a box cover 41 on the upper side is installed. do.

When the hydraulic hose connector 62 of the portable hydraulic switch 60 is connected to the outside of the cylinder body 63, the hydraulic pressure generated from the portable hydraulic pressure generating device 110 is opened via the direction switching valve 110. The hydraulic flow advances from the front hose connector (62a) to the rear hose connector (62b) in the direction of the moving piston (64) and rotates the power transmission unit (50) to interlock with the open arm (30) cover (20) When the cover 20 is closed, the direction switching valve 110 is operated to advance the hydraulic flow from the rear hose connector 62b to the front hose connector 62a to move the piston 64 to its original position. The cover 20 is closed by rotating the power transmission unit 50 while switching to.

10 and 11 to 12, the hinge part 70 has a main pin 72 fastened to the hinge frame 71 that is seated in the hinge mounting hole 14 of the frame 10, and the main pin 72 has One side of the frame hinge 73 is fastened, and a sub pin 74 is fastened to the other side of the frame hinge 73 , and the sub pin 74 has a cover hinge 75 provided on the rear surface of the cover 20 . It is sequentially fastened so that the cover 20 can be opened 180 degrees from the frame 10 without external protrusion of the rotation shaft.

A lock nut 16 having a screw formed thereon is provided inside the front of the frame 10, and is provided opposite to the lock nut 16 so that the lock bolt 17 is seated at the front of the cover 20, and at the rear of the cover 20 When the cover fixing groove 27 is formed and the cover 20 is closed, the front part locks the lock bolt 17 and the rear part locks the lock protrusion 18 to the cover fixing groove 27 to firmly lock the cover 20 . be able to do it

In addition, the cover 20 can be opened and closed manually by fastening the eye bolt 29 to be fastened after dismantling the lock bolt 17 on the upper side of the bolt seating hole 28 .

And, a cover guide jaw 19 protruding to guide the lower edge of the cover 20 from being overlapped with the frame 10 is provided on the lower side of the locking protrusion 18, so that when the cover 20 is opened and closed, the The lower side can be seated in the correct position without interference with the frame 10 .

The anti-rotation protrusion 15 protruding upward is formed on both sides of the front inner side of the frame 10, and on both sides of the inner front outer periphery of the cover 20, the anti-rotation protrusion 15 is opposite to the concave anti-rotation By forming the seating hole 25, the rotation prevention seating hole 25 of the cover 20 is engaged with the rotation prevention protrusion 15 to prevent the rotation of the cover 20 to prevent friction between the frame 10 and the cover 20. wear can be prevented.

13 and 14, a safety fence 80 is installed on the upper portion of the frame 10 so that an operator can prevent a fall accident in advance when entering and exiting the sewer pipe, and the safety fence 80 is the frame ( 10) The lower side of the safety fence frame 81 is provided with an angle-shaped fence seating hole 81a to prevent back and forth movement from the upper side, and the shaft 31 of the open arm rest 30 using a length adjustment clip 83 at the rear. ) and securely attach the fence fastener 82 to the lock nut 16 provided in the frame 10 using the fence fastener bolt 85 to open and close the door 84 and use it safely. can

In addition, when entering and exiting the sewage pipe, the connection ring 91 provided on the safety ladder 90 is easily fastened vertically to the shaft 31 to secure the entry and exit space as much as possible when entering and exiting the sewage pipe, thereby preventing falling into the opening. can be prevented in

The present invention is not limited to the specific preferred embodiments described above, and various modifications are possible by anyone with ordinary skill in the art to which the invention pertains without departing from the gist of the invention as claimed in the claims. Of course, such modifications are intended to be within the scope of the claims.

10: frame 11: opening seating portion 12: cover seating portion
13: opening/closing fitting 14: hinge fitting 15: anti-rotation protrusion
16: lock nut 17: lock bolt 18: lock protrusion
19: cover guide jaw 20: cover 21: inclined seating part
22: guide rail 23: slide cutout 24: guide rail fastening part
25: anti-rotation seat 26: gap maintaining protrusion 27: cover fixing groove
28: bolt seating work 29: eye bolt
30: open arms 31: shaft 31a: spline
32: main arm connector 32a: arm replacement bolt 33: main arm stand
33a: moving incision 34: moving arm 34a: moving groove
35: guide roller 36: movable arm rod restraint pin 37: movable arm replacement fastening pin
40: power transmission box 41: box cover
50: power transmission unit 50a: piston connection pin 50b: spline connection groove
60: portable hydraulic switchgear 61: hydraulic cylinder case 61a: cylinder fastening pin
62: hydraulic hose connector 62a: front hose connector 62b: rear hose connector
63: cylinder body 64: moving piston 64a: piston connecting ring
65: switchgear fastening bolt 66: switchgear fastening nut
70: hinge part 71: hinge frame 72: main pin
73: frame hinge 74: sub pin 75: cover hinge
80: safety fence 81: safety fence frame 81a: fence seat
82: fence fastener 83: length adjustment clip 84: door
85: fence fastening bolt 90: safety ladder
100: portable hydraulic generator 110: directional valve

Claims (9)

In a circular manhole cover that is seated in an opening for equipment or people to enter as a sewage pipe buried on one side of a sidewalk or driveway,
A ring-shaped opening seating part 11 so as to be seated on the outer periphery of the opening, a cover seating part 12 extending upward from the opening seating part 11 and having a multi-stage locking protrusion formed therein, and the cover seating a frame 10 having opening/closing mounting holes 13 penetrating both sides of the rear surface of the unit 12 and hinge mounting holes 14 cut from the upper side of the rear surface of the cover receiving unit 12 to the lower side;
a cover 20 that opens and closes an opening at the upper side of the frame 10 and has a seating portion 21 having an inclined outer periphery so as to be in close contact with the cover seating portion 12;
an opening arm 30 that is seated on the opening/closing fitting 13 of the frame 10 to rotate the cover 20;
a power transmission box 40 having a space formed therein so that a power transmission unit 50 for transmitting power to the inside from one side of the outside of the frame 10 is provided and having a box cover 41 on the upper side;
The power transmission unit 50 is connected to the inner side of the box cover 41 of the power transmission box 40 to open and then carry the box cover 41 and is fastened with bolts to open and close the cover 20. a hydraulic switchgear (60);
One side is seated on the hinge mounting hole 14 of the frame 10, and the other side is integrally connected with the cover 20 to open and close the cover 20. Portable hydraulic, characterized in that it consists of a hinge 70 A circular manhole cover that opens and closes with a switchgear. The method of claim 1,
A guide rail 22 that is recessed and detached from the center to one side so that the open arm 30 slides back and forth is formed on the inside of the cover 20,
Slide incisions 23 cut on both sides are formed on the inside of the front of the guide rail 22 to guide while preventing the separation of the open arms 30,
A circular manhole cover that opens and closes with a portable hydraulic switchgear, characterized in that guide rail fastening parts 24 for attaching and detaching the guide rail 22 with bolts are formed on both sides of the guide rail 22.
3. The method of claim 1 or 2,
The open arms 30 are seated on both sides of the opening and closing fittings 13 of the frame 10 and are fastened to the power transmission unit 50 and rotated while being fastened to the center of the shaft 31 and the shaft 31 . The main arm connector 32 fastened to the center of the bar-shaped main arm stand 33 with a movable cutout 33a formed thereon so that one side is connected to the main arm connector 32, rotates up and down, and the other side slides up and down. ), a moving arm 34 having a moving groove 34a so that one side moves up and down along the moving cutout 33a of the main arm 33, and a concave portion formed on the other side of the moving arm 34. It is seated on the cover 20 and consists of a guide roller 35 connected with a pin so as to move along the slide cutout 23 of the cover 20,
Inside the moving cutout 33a of the main arm 33 and the moving groove 34a of the moving arm 34, there are a moving arm replacement fastening pin 37 that is mutually fastened, and a moving arm 34 so as to reciprocate therebetween. A moving arm rod restraining pin 36 for restraining is provided,
A portable hydraulic switchgear, characterized in that at one end of the shaft (31), a spline (31a) formed with a plurality of grooves is provided so as to be engaged with the power transmission unit (50) provided inside the power transmission box (40). A circular manhole cover that opens and closes with The method of claim 1,
The portable hydraulic switch 60 includes a hydraulic cylinder case 61 whose lower side is opened to be seated on the power transmission box 40, and a portable hydraulic pressure generator 100 on the upper side of the hydraulic cylinder case 61 and The hydraulic hose connector 62 that is fastened to transmit hydraulic pressure, the hydraulic hose connector 62 is fastened to the inside, and a pin-shaped cylinder fastening pin 61a is connected to one end, so that the portable hydraulic pressure generator 100 is fastened. It is composed of a cylindrical body 63 that becomes a cylindrical body 63 and a movable piston 64 coupled to the inside of the cylinder body 63 to move up and down, and the hydraulic hose connector 62 protrudes to the outside of the cylinder body 63 . The front hose connector 62a and the rear hose connector 62b are formed so that the hydraulic pressure flows in and out, and the front hose connector 62a and the rear hose connector 62b are interlocked by being engaged with the hydraulic pressure generating device 100. A direction switching valve 110 for switching the flow direction of hydraulic flow to open and close the cover 20 is provided,
The upper side of the power transmission unit 50 is provided with a piston connecting pin 50a protruding from the upper side so that the moving piston 64 is fastened, and the lower side thereof is at one side of the shaft 31 of the open arm 30 . A circular manhole cover that opens and closes with a portable hydraulic switchgear, characterized in that a spline connection groove (50b) having a plurality of grooves formed therein is formed so as to be detachably engaged with the provided spline (31a). The method of claim 1,
The hinge part 70 is connected to a hinge frame 71 seated on the hinge mounting hole 14 of the frame 10, and a pin-shaped main pin 72 in the perforation of the hinge frame 71. The frame hinge 73 that rotates and the sub-pin 74 fastened to the frame hinge 73 and the cover hinge 75 integrally connected with the cover 20 to open the cover 20 by 180 degrees A circular manhole cover that opens and closes with a portable hydraulic closing device characterized by The method of claim 1,
A plurality of anti-rotation protrusions 15 are provided inside the cover seat 12 of the frame 10 to prevent the cover 20 from being rotated when seated,
A portable hydraulic switchgear, characterized in that an anti-rotation seat 25 is formed on the front inner periphery of the cover 20 to be opposed to the anti-rotation protrusion 15 and to prevent the cover 20 from rotating. A circular manhole cover that opens and closes. The method of claim 1,
On the outer periphery of the seating portion 21 of the cover 20, as the cover 20 is opened and closed, it is in close contact with the inner side of the frame 10, and a plurality of gap maintaining protrusions 26 protruding to prevent shaking even from a physical impact. A circular manhole cover that opens and closes with a portable hydraulic closing device, characterized in that it is formed. 8. The method of claim 7,
A lock nut 16 having a screw formed therein is provided on the inside of the front of the frame 10 so that a lock bolt 17 is seated to lock the cover 20,
A bolt seating hole 28 is formed in the front of the cover 20 to face the lock nut 16 to be seated while the lock bolt 17 is inserted,
The upper side of the bolt seating hole 28 is provided with an eye bolt 29 to be manually opened and closed,
A concave cover fixing groove 27 is provided at the rear of the cover 20 , and is inserted into the cover fixing groove 27 when the cover 20 is closed at the rear of the frame 10 . A locking protrusion (18) protruding so that the rear is locked is formed,
A circular manhole cover that opens and closes with a portable hydraulic switchgear, characterized in that the lower side of the frame (10) is provided with a cover guide jaw (19) protruding to guide the cover (20) to the correct position when the cover (20) is opened and closed. 4. The method of claim 3,
A safety fence 80 is installed on the upper portion of the frame 10 to ensure safety when an operator enters and exits the sewer pipe, and the safety fence 80 is installed with a plurality of blocking bars to control entry and exit of the frame 10. The safety fence frame 81 having an angle-shaped fence seating hole 81a to be seated on the upper part of the cover seating part 12, and the length of the safety fence frame 81 at the rear of the safety fence frame 81 are adjusted to the shaft 31. It is fastened to the lock nut 16 provided in the frame 10 with a length adjustment clip 83 for elastically fastening, and a fence fastening bolt 85 to be seated on the frame 10 from the front of the safety fence frame 81. It is composed of a fence fastening hole 82 that is used, and an entrance door 84 that opens and closes to enter and exit the sewage pipe in front of the safety fence frame 81,
Inside the safety fence 80, a portable safety ladder 90 is installed to secure the space when entering and exiting the sewage pipe to the maximum by fastening the connecting ring 91 to the shaft 31 and holding it by hand. A circular manhole cover that opens and closes with a portable hydraulic switchgear.

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