Manhole-based sewage control system

Abstract

The present invention relates to a manhole-based sewage control system, wherein the manhole-based sewage control system comprises a manhole backflow prevention device inserted and installed within a manhole to prevent backflow of sewage, and a manhole sewage bypass device installed above the manhole to bypass sewage.

Description

Technology Field

[0001] The present invention relates to a manhole-based sewage control system, and more specifically, to a manhole-based sewage control system that is firmly fixed inside a manhole through a mechanical support structure and an air-inflatable sealing structure, effectively blocks backflow of sewage, and enables continuous sewage treatment even during construction or inspection by diverting the sewage flow between manholes. Background Technology

[0002] A manhole is a structure installed for the inspection or maintenance of underground pipes, communication lines, heat supply pipes, etc., and a passage is formed inside the manhole for the inflow and outflow of sewage. The top of the manhole is generally exposed to the ground and is sealed under normal circumstances, but is configured to open during inspection, maintenance, or construction work to allow workers to enter the interior.

[0003] However, while work is being performed inside a manhole, the inflow of external sewage or the rapid backflow of residual water within the pipes can expose workers to danger or cause sewage to overflow to the surface. To prevent such backflow issues, a backflow prevention device that can be temporarily installed inside the manhole is typically used; this serves as a means to ensure safety and hygiene during work by temporarily blocking the flow of sewage.

[0004] Conventional backflow prevention devices typically employ a method in which a sealing mechanism in the form of a rubber pack is inserted into a manhole and inflated by injecting air to ensure a tight seal against the wall. While this type of device has the advantages of a simple structure and reusability, the expansion force of the rubber pack alone may not be sufficient to ensure a tight seal against the inner wall of the manhole, and there is a risk that the device may detach due to sewage pressure or external impact.

[0005] Furthermore, it is frequently necessary to temporarily block or alter the flow of sewage during internal manhole construction, which entails the inconvenience of manual work such as separate pipe connections and pump transfers. Particularly in areas where multiple manholes are installed in close proximity, there is a need for a method to divert sewage through adjacent manholes while work is being performed on one; however, there is currently a lack of systematic devices or systems to support this. Prior art literature

[0006] Republic of Korea Registered Patent No. 10-1996050 The problem to be solved

[0007] The objective of the present invention is to solve the aforementioned conventional problems by providing a manhole-based sewage control system that is firmly fixed inside a manhole through a mechanical support structure and an air-inflatable sealing structure, effectively blocks backflow of sewage, and enables continuous sewage treatment even during construction or inspection by diverting the sewage flow between manholes. means of solving the problem

[0008] The above objective is achieved by a manhole backflow prevention device according to the present invention, which is installed inside a manhole to block the backflow of sewage, wherein the manhole backflow prevention device comprises: a disc-shaped body portion; a support portion installed on the upper surface of the body portion and fixing the device to the inner wall of the manhole; and a first sealing portion provided on the lower surface of the body portion, which expands upon air injection and adheres to the inner wall of the manhole to seal the gap between the body portion and the inner wall of the manhole.

[0009] Additionally, the support member may include: a central part which is in the form of a hollow rod and has screw threads formed on its inner surface; a driving part which is rotatably coupled to the central part; a first extension part in which one side is screw-coupled to one side of the central part and the other side has a fixed plate formed to contact the inner wall of the manhole; a second extension part in which one side is screw-coupled to the other side of the central part and the other side has a fixed plate formed to contact the inner wall of the manhole; and a plurality of mounting parts installed on the upper surface of the body part and on which the central part, the first extension part, and the second extension part are mounted.

[0010] In addition, the support member includes a ratchet structure for the driving member, and the first extension member and the second extension member have screw threads formed in opposite directions on one outer circumference that are coupled to the center, so that the first extension member and the second extension member symmetrically extend or contract according to the rotational direction of the driving member and adhere to the inner wall of the manhole, thereby supporting the manhole-based sewage control system.

[0011] In addition, the body portion may be provided with a first injection portion on its upper surface for injecting air into the first sealing portion.

[0012] In addition, the first sealing part can block the backflow of sewage by receiving air through the first injection part, expanding, and adhering to the inner wall of the manhole.

[0013] The above objective is achieved by a manhole sewage bypass device according to the present invention, which is installed above a manhole to bypass sewage, wherein the manhole sewage bypass device comprises: a tank portion for temporarily storing sewage; an insertion portion connected to the lower surface of the tank portion and inserted into the manhole to form a flow path for sewage to flow into the tank portion or be discharged from the tank portion; a connection portion formed on the side of the tank portion; a second sealing portion provided on the outer surface of the insertion portion and expanded upon air injection to adhere to the upper slab of the manhole, thereby sealing the gap between the insertion portion and the upper slab of the manhole; and a piping portion coupled to the connection portion and forming a flow path for the movement of sewage stored in the tank portion, wherein the manhole sewage bypass device is provided in a plurality of units, and adjacent manhole sewage bypass devices are connected by a connecting pipe to form a path through which sewage can bypass.

[0014] In addition, the manhole sewage bypass device may further include an anti-detachment fixing part that is arranged to penetrate the tank part vertically and secures the tank part in close contact with the upper slab of the manhole.

[0015] In addition, the manhole sewage bypass device may further include a water level measuring unit installed in the tank section and measuring the sewage level inside the tank section. Effects of the invention

[0016] According to the present invention, through a mechanical support structure and an air-inflatable sealing structure, it is firmly fixed inside a manhole and has the effect of effectively blocking the backflow of sewage.

[0017] According to the present invention, a structure capable of diverting wastewater to an adjacent manhole allows for the maintenance of a continuous flow of wastewater even during manhole operations, thereby improving the safety of workers and the stability of the wastewater system.

[0018] Meanwhile, the effects of the present invention are not limited to those mentioned above, and various effects may be included within the scope obvious to a person skilled in the art from the contents described below. Brief explanation of the drawing

[0019] FIG. 1 is a plan view of a manhole backflow prevention device of a manhole-based sewage control system according to one embodiment of the present invention, and FIG. 2 is a bottom view of the manhole backflow prevention device of FIG. 1, and FIG. 3 is a perspective view of the first sealing part of the manhole backflow prevention device of FIG. 1 before being coupled, and FIG. 4 is a perspective view after the first sealing part of the manhole backflow prevention device of FIG. 1 has been coupled, and FIG. 5 illustrates the manhole backflow prevention device of FIG. 1 installed in a manhole, and FIG. 6 illustrates pads provided on the first extension and the second extension of the support portion of the manhole backflow prevention device of FIG. 1, and FIG. 7 is a side view of a manhole sewage bypass device of a manhole-based sewage control system of FIG. 1, and FIG. 8 is a front view of the manhole sewage bypass device of FIG. 7, and FIG. 9 is a plan view of the manhole sewage bypass device of FIG. 7, and FIG. 10 is a bottom view of the manhole sewage bypass device of FIG. 7, and Figure 11 illustrates the manhole sewage bypass device of Figure 7 installed in a manhole. Specific details for implementing the invention

[0020] Some embodiments of the present invention are described in detail below with reference to exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings.

[0021] In addition, when describing embodiments of the present invention, if it is determined that a detailed description of related known configurations or functions would hinder understanding of the embodiments of the present invention, such detailed description is omitted.

[0022] In addition, terms such as first, second, A, B, (a), (b), etc., may be used when describing the components of the embodiments of the present invention. These terms are used merely to distinguish the components from other components, and the essence, order, or sequence of the components is not limited by the terms used.

[0024] From now on, a manhole-based sewage control system according to one embodiment of the present invention will be described in detail with reference to the attached drawings.

[0025] FIG. 1 is a plan view of a manhole backflow prevention device of a manhole-based sewage control system according to an embodiment of the present invention, FIG. 2 is a bottom view of the manhole backflow prevention device of FIG. 1, FIG. 3 is a perspective view of the manhole backflow prevention device of FIG. 1 before the first sealing part is coupled, FIG. 4 is a perspective view of the manhole backflow prevention device of FIG. 1 after the first sealing part is coupled, FIG. 5 shows the manhole backflow prevention device of FIG. 1 installed in a manhole, FIG. 6 shows pads provided on the first extension part and the second extension part of the support part of the manhole backflow prevention device of FIG. 1, FIG. 7 is a side view of a manhole sewage bypass device of a manhole-based sewage control system of FIG. 1, FIG. 8 is a front view of the manhole sewage bypass device of FIG. 7, FIG. 9 is a plan view of the manhole sewage bypass device of FIG. 7, FIG. 10 is a bottom view of the manhole sewage bypass device of FIG. 7, and FIG. 11 is FIG. This is an illustration of the manhole sewage bypass device of 7 installed in a manhole.

[0026] A manhole-based sewage control system according to one embodiment of the present invention may include a manhole backflow prevention device (100) and / or a manhole sewage bypass device (200).

[0028] As illustrated in FIGS. 1 to 6, the manhole backflow prevention device (100) is a device for preventing backflow of sewage and can be installed by being inserted into a manhole. More specifically, the manhole backflow prevention device (100) may include a body part (110), a support part (120), and / or a first sealing part (130).

[0029] The body portion (110) is a main frame forming the body of the backflow prevention device (100) of the present invention and can be installed by being inserted into a manhole.

[0030] The body part (110) is generally in the shape of a disc, but is formed as a structure combining a flat top plate and a cylindrical structure connected vertically thereto, so that a support part (120) described later is installed on the upper surface and a first sealing part (130) described later can be fastened on the lower surface.

[0031] The material of the body part (110) may be made of a material that is resistant to corrosion and has high mechanical strength, and for example, durable materials such as synthetic resin, aluminum, stainless steel, and lightweight metal may be applied.

[0032] A handle portion (111) may be provided on the upper part of the body portion (110) to facilitate the worker's insertion or withdrawal of the manhole backflow prevention device (100) of the present invention into or out of the manhole.

[0033] Additionally, a first injection part (112) for injecting air into the first sealing part (130), which will be described later, may be provided on the upper surface of the body part (110). The first injection part (112) may be formed integrally or provided to be detachable.

[0034] The first injection part (112) may include an injection port (112-1) connected to an external compressed air source, an air pressure gauge (112-2) for measuring and displaying the air pressure inside the first sealing part (130), and a valve (112-3) for discharging air inside the first sealing part (230).

[0035] The first injection part (112) is connected to a flow path penetrating the upper plate of the body part (110), and by supplying air supplied from the outside to the first sealing part (130) installed at the lower part of the body part (110) described later, the first sealing part (130) can be expanded.

[0036] According to the body part (110) described above, it functions as a central support structure of the manhole backflow prevention device (100) of the present invention, and at the same time secures an air injection passage to enable the first sealing part (130) to operate, and has the effect of providing a structural base for the combination of the upper support part (120) and the lower first sealing part (130).

[0037] Next, the support member (120) is a structure for firmly fixing the manhole backflow prevention device (100) of the present invention inside a manhole and can be installed on the upper surface of the body member (110) described above. More specifically, the support member (120) may include a mounting member (121), a central part (122), a driving part (123), a first extension part (124) and / or a second extension part (125).

[0038] First, the mounting portion (121) is a frame for mounting the central portion (122), the first extension portion (124), and the second extension portion (125), and may be extended protruding from the upper surface of the body portion (110) described above, and may be provided in multiple numbers. The mounting portion (121) may be in the form of a plate extending vertically from the upper surface of the body portion (110), and a hole may be formed in the center so that the central portion (122), described later, etc., can be inserted and supported.

[0039] Next, the central part (122) may be coupled to the mounting part (121) and positioned at the center of the support part (120). The central part (122) may be in the form of a hollow rod. Additionally, the central part (122) may be provided in the form of a hexagonal rod to mount the driving part (123) described later, or a hexagonal rod may be additionally coupled to the center of the central part (122).

[0040] Next, the drive unit (123) is rotatably installed in the center (122) and includes a ratchet mechanism or a rack and pinion gear mechanism inside, so that the first extension unit (124) and the second extension unit (125), which will be described later, can be extended or retracted in opposite directions according to the rotational operation of the operator.

[0041] More specifically, the drive unit (123) may include a ratchet structure that transmits rotational force in only one direction according to the user's repetitive rotation. The ratchet structure is generally composed of a ratchet wheel and a pawl, and is configured so that rotation is possible in only one direction by engaging the pawl with the teeth of the ratchet wheel. Accordingly, when the user rotates the drive unit (123), the pawl moves along the teeth to accumulate rotational force, and reverse rotation is prevented so that the extension part extends in only a certain direction. Additionally, the drive unit (123) may be provided as a ratchet structure capable of retraction through the release of the pawl or as a hybrid ratchet structure capable of bidirectional rotation, thereby allowing the first extension part (124) and the second extension part (125) that were extended to be retracted.

[0042] Additionally, the drive unit (123) may include a rack and pinion gear structure for converting rotational motion into linear motion. This structure operates such that as the pinion gear mounted on the central axis rotates, a pair of racks meshed with it move linearly in opposite directions.

[0043] When the drive unit (123) is rotated, the racks connected to the first extension unit (124) and the second extension unit (125) are simultaneously pushed or pulled in opposite directions according to the rotation of the pinion gear, thereby enabling symmetrical extension operation.

[0044] Next, the first extension part (124) and the second extension part (125) can be mounted on the mounting part (121) and screw-coupled to each side of the center (122). The first extension part (124) and the second extension part (125) can be extended or retracted in opposite directions depending on the rotational direction of the driving part (123).

[0045] The first extension part (124) and the second extension part (125) may be in the form of rods, and one side coupled to the center (122) may have screw threads formed on its outer surface, while the other side may have a fixing plate formed that contacts the inner wall of the manhole. At this time, the screw threads formed on the first extension part (124) and the second extension part (125) may be provided in a shape symmetrical to each other. That is, one of the first extension part (124) and the second extension part (125) may be provided in the form of a left-hand screw and the other in the form of a right-hand screw, so that they may extend or contract symmetrically according to the rotation of the driving part (123). The fixing plate may be in close contact with the inner wall of the manhole according to the movement of the extension part to support the device of the present invention.

[0046] Meanwhile, as shown in FIG. 6, the fixing plates of the first extension part (124) and the second extension part (125) may have a pad attached to the surface in contact with the inner wall of the manhole to improve the adhesion force with the inner wall of the manhole. For example, the pad may be a contact-type tube pad.

[0047] The above-described close-fitting tube pad can be attached to one side of a fixing plate that contacts the inner wall of a manhole. When air is injected into the close-fitting tube pad, it expands and adheres to the inner wall of the manhole. This structure can accommodate irregular surfaces or curvatures of the inner wall of the manhole and can adjust the adhesion force according to the expansion pressure.

[0048] According to the above-described support member (120), the two extension members are symmetrically extended by a driving member (123) that rotates based on the center (122), so that the device can be firmly fixed to the inner wall of the manhole, thereby preventing the device from detaching due to external forces such as the water pressure of sewage, and the effect is that a worker can easily install and dismantle the device (100) of the present invention.

[0049] Next, the first sealing part (130) seals the gap between the inner wall of the manhole and the body part (110) and can be coupled to the bottom of the body part (110) described above.

[0050] The first sealing part (130) may be provided in the form of a tube of elastic material formed to expand by injecting air from the outside, and is configured to be in close contact with the inner wall of the manhole. The first sealing part (130) may be formed of an elastic material such as rubber, silicone, or a synthetic resin-based thermoplastic elastomer.

[0051] The first sealing part (130) can be connected to the cylindrical structure at the bottom of the body part (110). Additionally, the first sealing part (130) can be connected to the flow path formed in the body part (110) through a pipe or the like to receive air from the outside, and accordingly, the first sealing part (130) can be expanded. The expanded first sealing part (130) comes into contact with the inner wall of the manhole and the entire perimeter, thereby physically blocking the backflow of sewage.

[0052] According to the first sealing part (130) described above, it can effectively block backflow of sewage by expanding due to air pressure and adhering to the inner wall of the manhole, and it can be used repeatedly through the elastic material and air pressure control, and it has the effect of preventing leakage or detachment due to water pressure.

[0053] According to a manhole backflow prevention device (100) according to one embodiment of the present invention, comprising a body part (110), a support part (120), and / or a first sealing part (130) as described above, it has the effect of being firmly fixed inside the manhole through a mechanical support structure and an air-inflated sealing structure and effectively blocking backflow of sewage.

[0055] As illustrated in FIGS. 7 to 11, the manhole sewage bypass device (200) is a device for bypassing sewage and can be installed on the upper part of a manhole. More specifically, the manhole sewage bypass device (200) may include a tank part (210), an insertion part (220), a connection part (230), a detachment prevention fixing part (240), a water level measuring part (250), and / or a second sealing part (260).

[0056] First, the tank section (210) temporarily stores wastewater, and an insertion section (220) can be connected to the lower surface.

[0057] The tank section (210) forms a body including a hollow storage space having a certain volume, and one or more connection ports for the inflow or outflow of wastewater may be provided on the side. The tank section (210) may basically be formed as a rectangular box structure, but is not limited thereto.

[0058] The material of the tank section (210) may be composed of a lightweight, high-strength material that is durable against wastewater and capable of repeated use or on-site transport. For example, high-density polyethylene (HDPE), glass fiber reinforced plastic (FRP), stainless steel, or aluminum alloy may be used. The tank body may be formed with a structure including reinforcing ribs or a pressure-resistant frame to withstand a constant load and water pressure.

[0059] A hole may be formed in the center of the upper surface of the tank section (210), and a plurality of movable rings (211) may be provided at the edge. The movable rings (211) can serve as rings that can be connected to lifting equipment when installing or removing the manhole sewage bypass device (200) of the present invention.

[0060] Additionally, a second injection part (212), similar to the first injection part (112) described above, may be provided on one side of the tank part (210). The second injection part (212) is intended to inject air into the second sealing part (260) described later, and the second injection part (212) may include an injection port (212-1) connected to an external compressed air source, an air pressure gauge (212-2) for measuring and displaying the air pressure inside the second sealing part (260), and a valve (212-3) for discharging air inside the second sealing part (260).

[0061] According to the tank section (210) described above, it is possible to secure a storage space for temporarily storing wastewater.

[0062] Next, the insertion part (220) is inserted into a manhole to form a flow path for wastewater to flow into or be discharged from the tank part (210), and can be connected to the lower surface of the tank part (210) described above.

[0063] The insertion part (220) may be provided as a through structure extending downward from the lower surface of the tank part (210) for direct connection with the wastewater flow path. The insertion part (220) may be formed in a shape corresponding to a manhole, for example, a cylindrical structure, and may include an upper opening communicating with the inside of the tank part (210) and a lower opening facing the direction of inflow into the manhole.

[0064] The above insert part (220) may be formed integrally with the tank part (210) or manufactured separately and firmly joined by means such as flange (231) joining, welding, or bolt fastening.

[0065] Additionally, a second sealing part (260), described later, may be provided on the outer surface of the insertion part (220) to block backflow of wastewater.

[0066] Additionally, a filter (221) to prevent the intrusion of foreign substances may be installed at the lower opening of the insertion part (220). The filter (221) may be configured to allow the flow of wastewater while blocking only the inflow of foreign substances.

[0067] For example, the filtration section (221) can be formed of a mesh-shaped filter screen, bar plate, filter mesh, etc., made of metal or synthetic resin material, and can effectively block floating matter or waste contained in the incoming wastewater from flowing into the tank section (210) through the insertion section (220).

[0068] The above filter section (221) is configured to be detachable so as to facilitate maintenance and cleaning. To this end, a connecting ring (222) capable of detachably securing the filter section (221) may be formed at the bottom of the insertion section (220). For example, the connecting ring (222) may be formed as a locking groove, a bolt fastening section, a clip fastening section, or a ring-shaped binding member, and may be configured to be installed by engaging with the edge or support frame of the filter section (221).

[0069] Additionally, a fixing ring (223) may be formed on the outer surface of the end side of the insertion part (220) to secure the second sealing part (260) described later. The fixing ring (223) is installed at the position where the second sealing part (260) is mounted to prevent the second sealing part (260) from detaching from the insertion part (220).

[0070] According to the above-described insertion part (220), the inside of the manhole and the tank part (210) can be connected to stably secure the path for the inflow or outflow of wastewater, and the effect of preventing foreign substances from entering the tank part (210) through the filter part (221) is achieved.

[0071] Next, the connecting part (230) connects the connecting pipe (p) and the tank part (210) and can be provided on one side of the tank part (210) described above.

[0072] The connecting portion (230) may be formed as a through structure including a hollow flow path communicating with the interior of the tank portion (210), and may be integrally molded on one side of the tank portion (210) or manufactured separately and joined. At least one connecting portion (230) may be provided on at least one side of the tank portion (210).

[0073] A flange (231) for connection with a connecting pipe (p), which will be described later, may be provided at the end of the above-mentioned connecting portion (230). The flange (231) may be formed as a circular or polygonal plate structure, and a plurality of fastening holes may be provided at the edge so that it can be firmly connected to the connecting pipe (p) through bolt fastening, etc. In addition, a gasket or rubber packing may be inserted into the joint surface between the flange (231) and the connecting pipe (p) to improve the airtightness and watertightness of the joint area.

[0074] Additionally, a cover (232) may be additionally provided at the end of the connection part (230). The cover (232) is formed in a structure that temporarily seals the connection part (230) to prevent wastewater from flowing in or out, and can prevent foreign matter from entering or contaminating the connection part (230) when it is not in use.

[0075] The above cover (232) is provided in a shape corresponding to the structure of the flange (231) and can be detachably coupled to the flange (231) of the connecting part (230) by means such as bolt fastening, and can be installed together with a sealing means such as a rubber packing to prevent leakage.

[0076] According to the above-described connecting part (230), it is possible to facilitate communication between the tank part (210) and the connecting pipe (p), thereby providing a passage that can connect the sewage flow to the outside.

[0077] Next, the anti-detachment fixing part (240) is fixed to the upper slab of the manhole and can be provided to penetrate the tank part (210) described above vertically.

[0078] The anti-detachment fixing part (240) can accurately fix the installation position of the tank part (210) located on the upper surface of the manhole top slab and perform the function of preventing detachment due to external force or vibration.

[0079] Specifically, the anti-detachment fixing part (240) may be a U-shaped rod with both ends bent. The anti-detachment fixing part (240) may be provided to penetrate the tank part (210) vertically, and may be provided to come into contact with the inner surface of the insertion part (220).

[0080] Additionally, the anti-detachment fixing part (240) may be provided in multiple numbers along the inner circumference of the insertion part (220), for example, a total of four may be provided, with one each on the top, bottom, left, and right sides based on the opening cross-section of the insertion part (220).

[0081] In addition, a fastening means such as a nut is provided at a position where the anti-detachment fixing part (240) penetrates the upper part of the tank part (210), so that the anti-detachment fixing part (240) can be configured to allow for vertical position adjustment and fixation.

[0082] When installing, the worker can place the tank portion (210) on the upper surface of the slab, rotate the hook end of the anti-detachment fixing portion (240) outward from the insertion portion (220) to catch on the lower surface of the slab, and tighten the upper fastening means to secure it, thereby ensuring that the slab and the tank portion (210) are in close contact. Through this, the tank portion (210) can be firmly fixed on the slab without detachment due to external force, water pressure, vibration, etc.

[0083] According to the above-described anti-detachment fixing part (240), the tank part (210) is firmly fixed to the upper surface of the slab, thereby ensuring the stability of the installation position and preventing detachment from external forces or vibrations.

[0084] Next, the water level measuring unit (250) measures the wastewater level inside the tank unit (210) and can be installed in the tank unit (210) described above.

[0085] The water level measuring unit (250) may be an electronic water level gauge provided on one side of the tank unit (210) to detect the water level of wastewater stored inside the tank unit (210) and to record the water level data over time.

[0086] Specifically, the water level measuring unit (250) may include a water level measuring sensor, and the water level value detected by the sensor unit may be converted into digital data by a built-in microcontroller and transmitted to a storage device or an external control device.

[0087] Additionally, the water level measuring unit (250) can measure the water level by time, store the water level changes by time in a memory module, and, if necessary, transmit them remotely through a wired or wireless communication unit so that the operator can check past and present water level data without going directly to the site.

[0088] According to the above-described water level measuring unit (250), the wastewater level inside the tank unit (210) can be recorded and monitored on an hourly basis, allowing for the analysis of whether there is a bypass flow, changes in storage capacity, and long-term inflow patterns, thereby having the effect of greatly improving the efficiency of management and maintenance.

[0089] Next, the second sealing part (260) seals the gap between the insertion part (220) and the top slab of the manhole and can be installed on the outer surface of the insertion part (220) described above.

[0090] The second sealing part (260) is fixed along the outer surface of the insertion part (220) and may be provided in the form of a tube of elastic material formed to expand by receiving air from the outside, similar to the first sealing part (130) described above. The second sealing part (260) may be formed of a compressible and durable material such as rubber, silicone, or thermoplastic elastomer (TPE), and may be configured to expand in the circumferential direction when air is injected and be compressed against the inner surface of the slab.

[0091] The second sealing part (260) is connected to the second injection part (212) described above through a nozzle, and through this, it can be expanded by receiving air from an external compressed air source connected to the second injection part (212), and as a result, the gap between the insertion part (220) and the upper slab of the manhole can be sealed.

[0092] According to the second sealing part (260) described above, the gap between the insertion part (220) and the slab is securely sealed with air pressure, thereby preventing backflow of wastewater, odors, and the inflow of external contaminants, thus ensuring hygiene and safety.

[0093] The manhole sewage bypass device (200) described above can be installed in each manhole, and adjacent manhole sewage bypass devices (200) can be connected through a connecting pipe (p). Specifically, one end of the connecting pipe (p) is connected to the connecting part (230) of one manhole sewage bypass device (200), and the other end of the connecting pipe (p) is connected to the connecting part (230) of an adjacent manhole sewage bypass device (200), thereby allowing the adjacent manhole sewage bypass devices to be connected.

[0094] Accordingly, the wastewater inside the manhole flows into the tank section (210) of one manhole wastewater bypass device (200), then moves to the tank section (210) of an adjacent manhole wastewater device (200) through a connecting pipe (p), and subsequently flows along a bypass path that discharges into the manhole.

[0095] At this time, one or both ends of the connecting pipe (p) are provided to correspond to the flange (231) of the connecting part (230) and can be joined to the flange (231). In addition, the connecting pipe (p) is provided in various shapes such as straight, curved, rectangular, or multi-jointed, so that it can be flexibly applied according to the space constraints of the installation site or the direction of sewage flow, and can perform the function of effectively bypassing the flow of sewage by stably connecting multiple manhole sewage bypass devices (200).

[0096] As described above, the manhole sewage bypass device (200) of the present invention can divert the flow of sewage to an adjacent manhole while work is being performed in a specific manhole, thereby contributing to stability during work inside the manhole and maintaining a continuous flow of sewage.

[0097] According to a manhole sewage bypass device (200) according to an embodiment of the present invention, which includes a tank part (210), an insertion part (220), a connection part (230), a detachment prevention fixing part (240), a water level measuring part (250), and / or a second sealing part (260) as described above, the flow of sewage can be stably diverted to an adjacent manhole even during inspection, maintenance, or emergency work at a specific manhole, thereby maintaining the continuity of the sewage system while simultaneously improving the safety of workers and work efficiency.

[0099] Although all components constituting an embodiment of the present invention have been described above as being combined or operating in combination, the present invention is not necessarily limited to such an embodiment. That is, within the scope of the purpose of the present invention, all components may be selectively combined in one or more ways to operate.

[0100] Furthermore, terms such as “include,” “compose,” or “have,” as described above, mean that the relevant component may be inherent unless specifically stated otherwise; therefore, they should be interpreted as allowing for the inclusion of additional components rather than excluding them. All terms, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains, unless otherwise defined. Commonly used terms, such as those defined in advance, should be interpreted in accordance with their meaning in the context of the relevant technology and, unless explicitly defined in the present invention, should not be interpreted in an ideal or overly formal sense.

[0101] Furthermore, the above description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications and variations within the scope of the essential characteristics of the present invention.

[0102] Accordingly, the embodiments disclosed in this invention are intended to illustrate, not limit, the technical concept of the invention, and the scope of the technical concept of the invention is not limited by these embodiments. The scope of protection of this invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of this invention. Explanation of the symbols

[0103] 100: Manhole backflow prevention device 110 : Body part 111 : Handle part 112: First injection section 112-1 : Injection port 112-2 : Tire pressure gauge 112-3 : Valve 120 : Support 121 : Mounting part 122 : Center 123 : Driving unit 124 : 1st extension part 125 : 2nd extension 130 : First seal 200: Manhole sewage bypass device 210: Tank section 211 : Moving ring 212: Second injection section 212-1 : Injection port 212-2 : Tire pressure gauge 212-3 : Valve 220 : Insert 221 : Filter section 222 : Link 223 : Fixing ring 230 : Connection part 231 : Flange 232 : Cover 240 : Anti-detachment fixing part 250 : Water level measuring unit 260 : Second seal P: Connecting pipe

Claims

Claim 1 A manhole backflow prevention device installed inside a manhole to block backflow of sewage, wherein the manhole backflow prevention device comprises: a disc-shaped body part; a support part installed on the upper surface of the body part and fixing the device to the inner wall of the manhole; and a first sealing part provided on the lower surface of the body part and expanding upon air injection to adhere to the inner wall of the manhole, thereby sealing the gap between the body part and the inner wall of the manhole, wherein the support part comprises: a central part in the shape of a hollow rod with screw threads formed on its inner circumference; a driving part rotatably coupled to the central part; a first extension part having one side screw-coupled to one side of the central part and the other side having a fixing plate formed to contact the inner wall of the manhole; a second extension part having one side screw-coupled to the other side of the central part and the other side having a fixing plate formed to contact the inner wall of the manhole; and a plurality of mounting parts installed on the upper surface of the body part and on which the central part, the first extension part, and the second extension part are mounted. Claim 2 delete Claim 3 A manhole backflow prevention device according to claim 1, wherein the support member comprises a ratchet structure for the driving member, and the first extension member and the second extension member have screw threads formed in opposite directions on one outer circumference that are coupled to the center, so that the first extension member and the second extension member symmetrically extend or contract according to the rotational direction of the driving member and adhere to the inner wall of the manhole, thereby supporting the manhole backflow prevention device. Claim 4 A manhole backflow prevention device according to claim 1, wherein the body portion is provided with a first injection portion on the upper surface for injecting air into the first sealing portion. Claim 5 A manhole backflow prevention device according to claim 4, wherein the first sealing part is characterized by receiving air through the first injection part, expanding, and adhering to the inner wall of the manhole to block the backflow of sewage. Claim 6 A manhole sewage bypass device installed on the upper part of a manhole to bypass sewage, wherein the manhole sewage bypass device comprises: a tank portion for temporarily storing sewage; an insertion portion connected to the lower surface of the tank portion and inserted into the manhole to form a flow path for sewage to flow into the tank portion or be discharged from the tank portion; a connection portion formed on the side of the tank portion; a second sealing portion provided on the outer surface of the insertion portion and expanded upon air injection to adhere to the upper slab of the manhole, thereby sealing the gap between the insertion portion and the upper slab of the manhole; and an anti-detachment fixing portion provided to penetrate the tank portion vertically and to fix the tank portion in close contact with the upper slab of the manhole, wherein the manhole sewage bypass device is provided in a plurality of units, and adjacent manhole sewage bypass devices are connected by a connecting pipe to form a path through which sewage can bypass. Claim 7 delete Claim 8 A manhole sewage bypass device according to claim 6, wherein the manhole sewage bypass device further comprises a water level measuring unit installed in the tank portion and measuring the sewage water level inside the tank portion.

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