Integrated Manhole for Pressure Reducing Valve

Abstract

The pressure reduction valve integrated manhole cover of the present invention has the advantage of preventing secondary accidents involving collisions with people or vehicles passing near the manhole due to sudden sudden phenomena where the manhole outer cover (10) detaches from the cover frame (1) and rises up, thereby preventing collisions with people or vehicles passing near the manhole. This is because when pressure exceeding a critical threshold inside the manhole occurs, the pressure reduction valve (100) rises simultaneously by the force of the manhole inner cover (70) rising, thereby opening the pressure discharge hole (12) of the manhole outer cover (10) that was blocking the manhole, and when the pressure inside the manhole drops below the critical threshold, the manhole inner cover (70) and the pressure reduction valve (100) return to their original positions by their own weight and close the pressure discharge hole (12).

Description

Technology Field

[0001] The present invention relates to a manhole cover integrated with a pressure-reducing valve, and more specifically, to a manhole cover integrated with a pressure-reducing valve capable of discharging gas pressure when the internal pressure of the manhole rises. Background Technology

[0002] Generally, a manhole is a hole created to allow people to access the underground from the road surface; depending on its purpose, it is classified into water supply and sewage, rainwater, wastewater, and telecommunications types, and is installed at regular intervals along roads.

[0003] The above manhole typically has a cylindrical shape with a lid, and an inlet pipe and an outlet pipe are respectively connected to the lower part of the pipe and buried. In particular, in the case of a manhole for water supply and sewage systems that transport rainwater and sewage, a manhole body is provided with multiple inlet pipes and outlet pipes connected to the lower side, and a lid frame is connected to the upper part of the manhole body, and a manhole lid is placed on top of the lid frame to cover it. The manhole formed in this way is buried underground, and when the manhole is not in use, the manhole lid blocks and protects the inside of the manhole body from the outside, while supplying water to homes or various facilities or discharging sewage, and during rain, it performs the function of draining rainwater from the road through the manhole lid.

[0004] The manhole covers commonly used for water and sewage manholes as described above are manufactured of cast iron or reinforced concrete and are designed to simply cover the open top of the manhole body. By forming multiple small, perforated inlet holes at regular intervals, they block the open area of ​​the manhole to prevent various accidents, while simultaneously blocking the entry of foreign substances, preventing the backflow of sewage, odors, or gases inside the manhole, and draining rainwater into the sewer pipe through the inlet holes.

[0005] However, since the manhole cover formed simply as described above is structured in a way that cannot first discharge the pressure of gas generated when an accident occurs inside the manhole, there was a problem that when pressure exceeding the critical threshold inside the manhole occurs, the manhole cover detaches and rises, causing a secondary accident involving people or vehicles to collide. Prior art literature

[0006] Korean Patent Publication No. 10-0987500 (October 6, 2010) The problem to be solved

[0007] The objective of the present invention is to provide a manhole cover integrated with a pressure reduction valve that can prevent secondary accidents, such as collisions with people or vehicles, caused by the manhole cover detaching and rising when pressure exceeding a critical threshold occurs inside the manhole. means of solving the problem

[0008] A manhole cover integrated with a pressure reduction valve according to an embodiment of the present invention for solving the above technical problem comprises: an outer manhole cover detachably installed on a first stopper on the upper side of the inner circumference of a cover frame and having a pressure discharge hole formed in the center; an inner manhole cover seated on a second stopper on the lower side of the inner circumference of the cover frame and raised by gas pressure when pressure exceeding a critical threshold is generated inside the manhole; and a pressure reduction valve installed in the pressure discharge hole and opening and closing the pressure discharge hole when simultaneously raised and lowered in accordance with the raising and lowering of the inner manhole cover, wherein the pressure reduction valve comprises: a lifting member having an opening / closing body formed to open and close the pressure discharge hole and a lifting rod formed in the center of the lower surface of the opening / closing body; a gas flow guide plate installed at a certain height on the outer circumference of the lifting rod; and a resilient member fitted onto the outer circumference of the lifting rod so as to be positioned below the gas flow guide plate. It is characterized by including a fixing plate installed at the lower outer circumference of the lifting rod so as to be positioned at the lower part of the resilient member and seated at the center of the upper surface of the manhole cover.

[0009] In another embodiment, the pressure relief hole of the present invention is characterized by having one or more formed in the center of the manhole cover so as to be opened and closed by the pressure reduction valve.

[0010] In another embodiment, the inner surface of the pressure discharge hole of the present invention is formed with an inclined surface portion in which the inner diameter decreases from the top to the bottom, and the outer surface of the opening / closing body is formed with an inclined surface portion in which the outer diameter decreases from the top to the bottom so as to correspond to the inclined surface portion.

[0011] In another embodiment, the lifting rod of the present invention is characterized by being in the form of a male screw so that the gas flow guide plate, the elastic member, and the fixing plate are fitted onto the outer circumference and then fixed in position by the first to fourth nuts, respectively.

[0012] In another embodiment, the first nut of the present invention is characterized by being fastened at a certain height of the lifting rod to prevent the gas flow guide plate from rising so as to be separated from the opening / closing body.

[0013] In another embodiment, the second and third nuts of the present invention are fastened to the lower part of the lifting rod so as to come into contact with each other, thereby preventing the upward movement of the fixing plate.

[0014] In another embodiment, the fourth nut of the present invention is characterized by being fastened to the lower end of the lifting rod and tightened so that the fixing plate comes into contact with the lower surface of the third nut.

[0015] In another embodiment, the gas flow guide plate of the present invention is in the form of a flat disc such that when rising, the edge catches on the lower edge of the pressure discharge hole, and is characterized by having a through hole formed in the center of the disc to allow the lifting rod to pass through, and a plurality of guide holes formed around the center of the disc to guide the flow of gas.

[0016] In another embodiment, the plurality of induction holes of the present invention are characterized by being formed at regular intervals along the central circumference of the disc within a range that does not exceed the inner diameter size of the pressure discharge hole.

[0017] In another embodiment, the inner diameter of the through hole of the present invention is formed to be larger than the outer diameter of the lifting rod so as not to interfere with the lifting rod when it is raised.

[0018] In another embodiment, the elastic member of the present invention is characterized in that it is in the form of a coil spring disposed between the gas flow guide plate and the fixed plate.

[0019] In another embodiment, the fixing plate of the present invention is in the shape of a disc and is characterized by having a fixing hole formed in the center through which the lifting rod passes. Effects of the invention

[0020] The pressure-reducing valve integrated manhole cover of the present invention has a structure in which, when pressure exceeding a critical threshold occurs inside the manhole, the pressure-reducing valve rises simultaneously due to the force of the inner manhole cover rising, thereby opening the pressure relief hole of the outer manhole cover that was blocking it and rapidly releasing gas pressure to the outside of the manhole, and when the pressure inside the manhole drops below the critical threshold, the inner manhole cover and the pressure-reducing valve return to their original positions by their own weight to close the pressure relief hole, thus having the effect of preventing secondary accidents involving collisions with people or vehicles passing near the manhole caused by sudden sudden phenomena where the outer manhole cover detaches from the cover frame and rises. Brief explanation of the drawing

[0021] FIG. 1 is an exploded perspective view illustrating a manhole outer cover, a pressure reducing valve, and a manhole inner cover according to the present invention. FIG. 2 is a perspective view illustrating a pressure reducing valve according to the present invention. FIG. 3 is a longitudinal cross-sectional view illustrating the state of the pressure reduction valve before operation in a manhole cover according to the present invention. FIG. 4 is a longitudinal cross-sectional view illustrating the state in which a pressure reduction valve in an outer manhole cover according to the present invention is operated to an intermediate height by an inner manhole cover. FIG. 5 is a longitudinal cross-sectional view illustrating the state in which the pressure reduction valve in the outer manhole cover according to the present invention is operated to the maximum height by the inner manhole cover. Specific details for implementing the invention

[0022] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, FIGS. 1 to 5, in order to fully understand the present invention. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be interpreted as being limited to the embodiments described in detail below. It should be noted that in each drawing, identical components may be illustrated with the same reference numerals. Detailed descriptions of known functions and components that are deemed to unnecessarily obscure the essence of the present invention are omitted.

[0023] Referring to FIGS. 1 to 5, the present invention comprises a lid frame (1), a manhole outer lid (10), a manhole inner lid (70), and a pressure reduction valve (100).

[0024] That is, the above manhole cover (10) is installed so as to be detachably seated on a first locking projection (3) formed on the upper side of the inner circumference of the cover frame (1), and one or more pressure discharge holes (12) are formed in the center of the manhole cover (10) which are opened and closed by a pressure reduction valve (100).

[0025] At this time, an inclined surface (12a) is formed on the inner surface of the pressure discharge hole (12), such that the inner diameter decreases from the top to the bottom.

[0026] The above manhole inner cover (70) is detachably seated on the second locking projection (5) formed on the lower side of the inner circumference of the cover frame (1) and serves to operate the pressure reduction valve (100) by rising due to gas pressure when pressure exceeding the critical threshold inside the manhole occurs.

[0027] The above pressure reduction valve (100) is installed in the pressure discharge hole (12) and serves to open and close the pressure discharge hole (12) when the manhole cover (70) is raised and lowered simultaneously.

[0028] That is, the pressure reduction valve (100) comprises: a lifting member (20) having an opening / closing body (22) that opens / closes the pressure discharge hole (12) and a lifting rod (24) formed at the center of the lower surface of the opening / closing body (22); a gas flow guide plate (40) installed at a certain height on the outer circumference of the lifting rod (24); a resilient member (50) fitted onto the outer circumference of the lifting rod (24) so ​​as to be positioned below the gas flow guide plate (40); and a fixing plate (60) installed at the lower outer circumference of the lifting rod (24) so ​​as to be positioned below the resilient member (50) and seated at the center of the upper surface of the manhole cover (70).

[0029] At this time, an inclined surface (22a) is formed on the outer surface of the opening / closing body (22) such that the outer diameter decreases from the top to the bottom, corresponding to the inclined surface (12a), so that when the opening / closing body (22) is raised to the upper outer side of the pressure discharge hole (12) and then lowered, it returns to its original position inside the pressure discharge hole (12), thereby serving to make the upper surface height of the manhole cover (10) and the upper surface height of the opening / closing body (22) equal.

[0030] It is preferable that the above lifting rod (24) be formed in the shape of a male screw so that the gas flow guide plate (40), the elastic member (50), and the fixing plate (60) are fitted onto the outer circumference and then fixed in position by the first to fourth nuts (30)(32)(34)(36).

[0031] At this time, the first nut (30) is fastened at a certain height of the lifting rod (24) and serves to prevent the gas flow guide plate (40) from rising so that it is separated from the opening / closing body (22).

[0032] The second and third nuts (32)(34) are fastened to the lower part of the lifting rod (24) so ​​as to come into contact with each other, serving to prevent the fixing plate (60) from rising.

[0033] The above-mentioned fourth nut (36) is fastened to the lower end of the lifting rod (24) and serves to tighten the fixing plate (60) so that it comes into contact with the lower surface of the third nut (34).

[0034] The above gas flow guide plate (40) is in the form of a flat disc whose edge catches on the lower edge of the pressure discharge hole (12) when rising, and a through hole (42) is formed in the center of the disc so that a lifting rod (24) passes through, and a plurality of guide holes (44) are formed around the center of the disc to guide the flow of gas.

[0035] At this time, it is preferable that the inner diameter of the through hole (42) be formed larger than the outer diameter of the lifting rod (24) so ​​as not to interfere with the lifting rod (24) when it is raised.

[0036] It is preferable that the plurality of induction holes (44) are formed at regular intervals along the center circumference of the disc within a range that does not exceed the inner diameter of the pressure discharge hole (12).

[0037] It is preferable that the above-mentioned spring member (50) be configured in the form of a coil spring placed between the gas flow guide plate (40) and the fixed plate (60).

[0038] The above fixing plate (60) is in the shape of a disc, and a fixing hole (62) is formed in the center so that a lifting rod (24) passes through it.

[0039] In the pressure reduction valve integrated manhole cover of the present invention configured as shown in FIG. 3, when the pressure reduction valve (100) installed on the manhole outer cover (10) is in a pre-operation state and pressure exceeding the critical value inside the manhole is generated as shown in FIG. 4, the manhole inner cover (70) rises under pressure due to this gas pressure, and the gap between the second stopper (5) inside the cover frame (1) that was blocking and the manhole inner cover (70) widens, and by pushing up the lower part of the pressure reduction valve (100), the opening / closing body (22) on the lifting member (20) side of the pressure reduction valve (100) opens the pressure discharge hole (12) formed in the manhole outer cover (10).

[0040] Additionally, when the pressure exceeding the critical threshold inside the manhole reaches its maximum, as shown in FIG. 5, the gas flow guide plate (40) is stopped by being caught on the lower edge of the pressure discharge hole (12) of the manhole outer cover (10), and the fixing plate (60) compresses the elastic member (50) by the pressure pushed by the manhole inner cover (70), thereby raising the lifting member (20) higher. Accordingly, the opening / closing body (22) of the lifting member (20) rises further from the pressure discharge hole (12) of the manhole outer cover (10), thereby widening the opening area of ​​the pressure discharge hole (12) and rapidly discharging the gas pressure inside the manhole.

[0041] At this time, the gas pressure rises through the gap between the second stopper (5) and the manhole inner cover (70) as indicated by the arrow direction in FIGS. 4 and 5, guided by a plurality of guide holes (44) on the side of the gas flow guide plate (40), and is rapidly discharged to the outside of the manhole through the pressure discharge hole (12) of the open manhole outer cover (10), thereby preventing a secondary accident in which a person or vehicle passing near the manhole collides with the manhole due to a sudden sudden phenomenon in which the manhole outer cover (10) detaches from the cover frame (1) and rises up, as pressure exceeding the internal critical value of the manhole is directly applied to the lower surface of the manhole outer cover (10).

[0042] In addition, when the opening / closing body (22) of the lifting member (20) is raised to open a passage in the pressure discharge hole (12) of the manhole cover (10), it is less than, for example, 1 cm from the upper surface (ground surface) of the manhole cover (10), so it does not obstruct the passage of pedestrians or vehicles, nor does it impair the aesthetics.

[0043] And, after the gas pressure is discharged outside the manhole, when the pressure inside the manhole drops below a critical value, the gap between the gas flow guide plate (40) and the fixed plate (60) is widened again by the elastic force of the elastic member (50), and it is restored to its original state as shown in FIG. 3 by the weight of the manhole inner cover (70) and the pressure reduction valve (100).

[0044] That is, the manhole inner cover (70) is seated on the second stopper (5) formed in the lower part of the cover frame (1) to block the passage, and the opening / closing body (22) on the lifting member (20) side of the pressure reduction valve (100) is inserted into the pressure discharge hole (12) formed in the manhole outer cover (10) to close the passage.

[0045] As such, the pressure reduction valve integrated manhole cover of the present invention has the advantage of preventing secondary accidents involving collisions with people or vehicles passing near the manhole due to sudden sudden phenomena where the manhole outer cover (10) detaches from the cover frame (1) and rises up, thereby preventing collisions with people or vehicles passing near the manhole. This is because when pressure exceeding a critical threshold inside the manhole occurs, the pressure reduction valve (100) rises simultaneously by the force of the manhole inner cover (70) rising, thereby opening the pressure discharge hole (12) of the manhole outer cover (10) that was blocking the manhole, and when the pressure inside the manhole drops below the critical threshold, the manhole inner cover (70) and the pressure reduction valve (100) return to their original positions by their own weight and close the pressure discharge hole (12).

[0046] Meanwhile, the present invention is not limited to the embodiments described above, but can be implemented with modifications and variations within the scope of the essence of the invention, and such technical concepts to which modifications and variations are applied should also be considered to fall within the scope of the following patent claims. Explanation of the symbols

[0047] 1 : Lid frame 3 : First stopper 5 : Second obstacle 10 : Manhole cover 12: Pressure relief hole 12a: Inclined surface 20 : Lifting member 22 : Opening / closing body 22a: Inclined surface section 24: Lifting bar 30: 1st nut 32: 2nd nut 34: 3rd nut 36: 4th nut 40: Gas flow guide plate 42: Through hole 44 : Guiding hole 50 : Resilient member 60 : Fixing plate 62 : Fixing hole 70 : Manhole cover 100 : Pressure reducing valve

Claims

Claim 1 A manhole outer cover (10) that is detachably installed on a first stopper (3) on the upper side of the inner circumference of a lid frame (1) and has a pressure discharge hole (12) formed in the center; a manhole inner cover (70) that is seated on a second stopper (5) on the lower side of the inner circumference of the lid frame (1) and rises by gas pressure when pressure exceeding a critical threshold is generated inside the manhole; and a pressure reduction valve (100) that is installed in the pressure discharge hole (12) and opens and closes the pressure discharge hole (12) when simultaneously raised and lowered according to the raising and lowering of the manhole inner cover (70), wherein the pressure reduction valve (100) comprises a lifting member (20) having an opening and closing body (22) that opens and closes the pressure discharge hole (12) and a lifting rod (24) formed in the center of the lower surface of the opening and closing body (22). A pressure reduction valve integrated manhole cover comprising: a gas flow guide plate (40) installed at a certain height on the outer circumference of the lifting rod (24); a resilient member (50) fitted on the outer circumference of the lifting rod (24) so ​​as to be positioned below the gas flow guide plate (40); and a fixing plate (60) installed on the lower outer circumference of the lifting rod (24) so ​​as to be positioned below the resilient member (50) and seated in the center of the upper surface of the manhole cover (70), wherein the lifting rod (24) is in the form of a male screw so as to be positioned by first to fourth nuts (30)(32)(34)(36) respectively after the gas flow guide plate (40), the resilient member (50), and the fixing plate (60) are fitted on the outer circumference. Claim 2 ◈Claim 2 was abandoned upon payment of the registration fee.◈ A pressure reduction valve integrated manhole cover according to Claim 1, characterized in that one or more pressure discharge holes (12) are formed in the center of the manhole cover (10) so as to be opened and closed by the pressure reduction valve (100). Claim 3 ◈Claim 3 was abandoned upon payment of the registration fee.◈ A pressure reduction valve integrated manhole cover according to Claim 2, characterized in that an inclined surface portion (12a) is formed on the inner surface of the pressure discharge hole (12) such that the inner diameter decreases from the top to the bottom, and an inclined surface portion (22a) is formed on the outer surface of the opening / closing body (22) such that the outer diameter decreases from the top to the bottom to correspond to the inclined surface portion (12a). Claim 4 delete Claim 5 A pressure reduction valve integrated manhole cover according to claim 1, characterized in that the first nut (30) is fastened at a certain height of the lifting rod (24) to prevent the gas flow guide plate (40) from rising so as to be separated from the opening / closing body (22). Claim 6 A pressure-reducing valve integrated manhole cover according to claim 5, characterized in that the second and third nuts (32)(34) are fastened to the lower part of the lifting rod (24) so ​​as to come into contact with each other to prevent the lifting of the fixing plate (60). Claim 7 A pressure reduction valve integrated manhole cover according to claim 6, characterized in that the fourth nut (36) is fastened to the lower end of the lifting rod (24) and tightened so that the fixing plate (60) comes into contact with the lower surface of the third nut (34). Claim 8 A pressure reduction valve integrated manhole cover according to claim 5, wherein the gas flow guide plate (40) is in the form of a flat disc whose edge catches on the lower edge of the pressure discharge hole (12) when rising, a through hole (42) is formed in the center of the disc so that the lifting rod (24) passes through, and a plurality of guide holes (44) for guiding the flow of gas are formed around the center of the disc. Claim 9 A pressure reduction valve integrated manhole cover according to claim 8, characterized in that the plurality of guide holes (44) are formed at regular intervals along the center circumference of the disc within a range that does not exceed the inner diameter of the pressure discharge hole (12). Claim 10 A pressure reduction valve integrated manhole cover according to claim 8, characterized in that the inner diameter of the through hole (42) is formed larger than the outer diameter of the lifting rod (24) so ​​as not to interfere with the lifting rod (24) when it is raised. Claim 11 ◈Claim 11 was abandoned upon payment of the registration fee.◈ A pressure reduction valve integrated manhole cover according to Claim 1, wherein the resilient member (50) is in the form of a coil spring disposed between the gas flow guide plate (40) and the fixed plate (60). Claim 12 A pressure reduction valve integrated manhole cover according to claim 7, wherein the fixing plate (60) is in the shape of a disc, and a fixing hole (62) is formed in the center so that the lifting rod (24) passes through it.

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