KR100974019B1 - apparatus of reverse protection for sewage and sea water - Google Patents

Abstract

A valve body in which the sewage inflow pipe and the discharge pipe are formed on a horizontal axis; An inlet installed in the middle of the inside of the valve body and having an outer diameter smaller than that of the valve body; A valve upper body connected to the middle upper end of the valve body with a pipe cross-sectional area capable of lifting up and down in a vertical direction and an ideal height and watertight structure capable of accommodating the entire mouth; An annular drainage packing bracket mounted integrally or assembling to the inner wall of the sewage inlet pipe side of the valve body; An annular drainage packing having an annular or elliptical structure constrained by the drainage packing bracket and connected to the inner wall of the sewage inlet pipe of the valve body in a watertight state; A band-shaped sub-bottom guide piece for supporting the lower end of the sub-ball at a lower end of the inner wall portion of the valve body directly below the upper valve body and inducing a close roll to the drainage packing bracket; A float lifting control piece for controlling the float not to retreat and float by the backflow sewage in the drain passage closing operation state; A float rise guide piece for controlling the release to the sewage discharge pipe side in the drain passage closed opening operation state and leading to rise inside the valve upper body; It provides a high productivity, high drainage, high quality sewage and seawater backflow prevention device characterized in that it comprises a.

Sewage pipe, gate, backflow prevention, valve body, fitting, drain packing, bracket, control

Description

Apparatus of reverse protection for sewage and sea water}

The present invention is installed in the middle part or the terminal part of the basic sewage pipe which is piped to the sump, the trunk sewer pipe connected to the sewage pipe in the sump, and the sewage pipe which discharges various sewage (including sewage) to the public water such as the river or the sea. The present invention relates to a device for preventing sewage backflow and odor to the sewage discharge destination side.

In addition, the present invention relates to a sewage pipe backflow prevention device which is installed at the distal end or the water gate to discharge various sewage on public waters such as rivers or the sea, and prevents sewage or river water and seawater from flowing back to the sewer pipe or sewer pipe.

The present invention also relates to a sewer pipe backflow prevention device which is installed at the end of the ditches of the dike for discharging agricultural water into the river in the pipe or open water channel, or the water gate, to prevent the flow of river water back to the side of the ditches when the water level of the stream is increased. do.

In addition, the present invention relates to an apparatus for preventing backflow and odor provided at an intermediate portion or end portion of various liquid drainage pipes other than the sewage pipe.

Sewage and sewage that are discharged to various drains such as houses, public facilities, and industrial facilities are collected from basic sewer pipes through sewage pipes such as collecting wells, sewer mains, trunk sewer pipes and sewer pipes, or sewage terminal treatment plants or sewage treatment facilities. It is housed in sewage treatment facilities, etc., and discharged to public water such as rivers and the sea.

As above, sewage pipes that process various sewage are treated with sewage in the form of waterways with free water during normal sewage discharge.However, in some areas, temporary storms or heavy rains occur, resulting in inflow of sewage pipe per unit time. When the treatment capacity (communication capacity) is larger than that, it becomes a water passage to discharge the sewage in full water without free water.

When the sewer pipe discharges the sewage in the condition of the water pipe, the inflow that cannot be discharged to the sewer pipe overflows to the road or the ground, and at the same time, the discharge pressure of the sewer pipe increases and flows back to the basic sewer pipe in the low zone, Backflow into drains and catchments in housing, public and industrial facilities causes flooding damage, and roads, septic tanks and other facilities are also flooded.

In addition, when the trunk sewer pipe becomes a water irrigation due to heavy rain or heavy rainfall in one region, or when the water level of the river rises for a short time, and when the water level of the river increases for a long time due to the rainy season, and when the sea water level of the sea rises. Flooding damage occurs due to the backflow of sewage, river water or seawater to the sewer pipe or trunk sewer pipe in the lower part of the back.

As the representative representative backflow prevention device for preventing the backflow of sewage, river water and seawater as described above, Korean Patent No. 10-0543435, "sewage backflow prevention device" (hereinafter referred to as the first invention 1), and Korea Patent Application 10- Prior inventions such as "Sewage backflow prevention device" (hereinafter referred to as Line 2) of 766279 are known.

The features of the sewage backflow prevention devices disclosed in the above inventions 1 and 2 are mainly installed in the middle of the horizontal sewer pipe such as the basic sewage pipe, the sump well or the sewer main pipe or the trunk sewer pipe, or installed at the distal end thereof, so that the device is discharged during normal sewage discharge. The spherical opening and closing valves in the horizontal direction are operated from the bottom to open the drainage passage, and when the sewage flows backward, the floating opening and closing valves float in close contact with the bottom of the sewer opening and closing drainage passage. By closing it, it is the structure which prevents the sewage backflowed to the sewage discharge destination side, and prevents the sewage backflow to a sewage pipe automatically.

According to the apparatuses of the first and second inventions having the above-described configuration, it is possible to compensate for the shortcomings of the other prior art vertical sewage backflow preventing devices, and to smoothly drain the sewage even if the discharge sewage contains large foreign substances. When the backflow phenomenon is eliminated, it has the effect of quickly opening the drainage pipe and can be used for horizontal sewer pipes.

However, the configurations of the first and second inventions 1 and 2 can be installed in the horizontal sewer pipe, but the center axis of the sewage inlet pipe and the discharge pipe of the apparatus is substantially formed at least between the upper and lower portions of the apparatus, while a predetermined step of at least the diameter of the sewer pipe is essentially formed therebetween. Since the sewage opening and closing opening is installed in the form of opening and closing by the float opening and closing side acting on a vertical line, there is a problem that can not be applied to a conventional horizontal sewer pipe that the pipeline central axis is formed on a single straight axis.

In addition, the drainage passage in the main body of the device is formed in a curved shape having two bent portions rather than a horizontal straight line, so that the drainage flow of sewage is not smooth, and there is a drawback of low drainage. Has the disadvantage of becoming larger.

In addition, when applied to the large-capacity standard, the diameter and height of the cylindrical body, which is the main body accommodating the floats, are increased proportionally, resulting in very low productivity and economic efficiency in mold making and parts fabrication. The horizontal step of the discharge pipe is also proportionally larger, which makes it difficult to apply to a large horizontal sewer pipe, which has a disadvantage of low practicality and expandability.

In addition, the components of the first and second inventions have a sewage backflow prevention function, but there is a problem that cannot prevent odors inevitably occurring in the sewer pipe.

The present invention is provided to solve the problems of the conventional prior invention sewage backflow prevention device as described above, one object is to install in the middle or the end of the horizontal sewer pipe or alternately with the water gate, so that the sewage inlet pipe and the discharge pipe of the device horizontal It is to provide a sewage and seawater backflow prevention device that can be connected in a straight line on the same center axis of the sewer pipe.

Another purpose is to ensure that the drainage passage is proportionally variable open and close according to the discharged sewage under normal sewage discharge, and the horizontal drainage passage is almost equivalent to the sewage pipeline at the maximum sewage discharge, so that there is no blockage of sewage mixed with various bulky substances. It is to provide a high drainage sewage and seawater backflow prevention device that can drain quickly and smoothly.

Another object is that the structure of the main body is formed into a simple moldable tubular shape, the structure is simple, the production and economical efficiency of the mold and parts are secured, the manufacturing cost is low, and the expandability is easy to apply to small to large, It is to provide a high quality, high functional sewage and seawater backflow prevention device with almost no operation rate.

Still another object is to provide a sewage and seawater backflow prevention device that performs a backflow prevention function reliably with fast and high airtightness during sewage backflow, and also has a odor blocking function.

Other objects may also be provided from the following description.

Sewage and seawater backflow prevention device configuration of the present invention for achieving the above object,

A valve body having a circular cross section formed on one side of the same horizontal center axis as a sewage inlet pipe and the other end of the sewage discharge pipe;

A mouthpiece which is installed into the middle of the valve body and whose outer diameter is smaller than the inner diameter of the valve body;

A vertical tube or inclined tube upper body connected to the upper end of the valve body in a vertical direction in which the sub-port can be lifted up and down in a vertical direction and a water-tight structure with a height higher than that can accommodate the sub-ball as a whole;

An annular drainage packing bracket having an integral or prefabricated fixed structure with the sewer inlet pipe side inner wall part of the valve body and having a binding portion for confining the drainage packing described later at the rear end; ;

The outer end has a coupling hole of an annular or oval structure that is constrained to the drainage packing bracket and is connected to the inner wall of the sewage inlet pipe of the valve body in a watertight state, and the inner end is concentrically concentric with the inner inner wall of the sewage inlet pipe. A soft drainage packing having a circular sheet in close proximity to a portion of the outer surface of the subsphere and in an elliptical shape intersecting the adjacent annular or central axis at an oblique angle;

At the lower end of the inner wall portion of the corresponding valve body directly below the upper valve body, the lower end of the buckle is supported and supported, and the buckle is intimately connected to the annular seat of the drainage packing to be connected in a drain passage closing state. A sewage discharge pipe side is high and the drainage packing side is formed to have a lower guide portion of a strip-shaped mouth;

When the ball is initially suspended by the sewage flowing back from the sewage discharge pipe side in the drain passage closing operation state in which the ball is closely connected to the annular sheet of the drain packing, A float lifting control piece protruding from an inner wall portion of the lower boundary of the inlet pipe rear end of the valve body and the valve upper body so as to control the retreat and floating of the float;

When the ball is pushed back through the lower guide piece of the ball by being pushed by the discharge sewage flowing into the sewage inlet pipe in the drain passage closing operation state which is closely connected with the annular sheet of the drain packing, the upper part of the upper center rear part of the ball is restrained by the inclined surface. A float raising guide piece protruding from the upper portion of the sewage discharge pipe of the valve body and the rear end boundary inner wall of the valve upper body to guide the floating of the float to the upper portion of the valve body while controlling the separation to the sewage discharge pipe side; It is characterized by comprising a configuration.

In the configuration of the present invention, each of the external ends of the sewage inlet pipe and the sewage discharge pipe of the valve body may further include a pipe-type flange or a screw-type fastening device for connecting in a watertight state with the sewer pipe.

In the configuration of the present invention, the valve upper body may be formed in a separate type that is assembled in an integral or watertight structure with respect to the intermediate upper end of the valve body, the cross section may be formed of a tube of circular or elliptical and square cross section.

In the configuration of the present invention, the valve upper body may be formed as a vertical tube or an inclined tube whose upper end surface is closed or opened and opened and closed by a watertight lid.

In the configuration in which the valve upper body is formed to be open in the configuration of the present invention and the watertight lid is provided, the watertight cap is selectively selected from either flanged or screwed according to the shape or capacity of the pipe section of the valve upper body. It can form in a structure.

In the configuration of the present invention, the ball is formed of a sphere having good buoyancy, but is preferably composed of a hollow stainless steel ball having high corrosion resistance, durability and surface strength, and low surface adhesion of foreign matter.

In the configuration of the present invention, the drainage packing bracket may be configured as an integrated wheel structure protruding annularly in the inner wall portion of the sewage inflow pipe, or a separable type assembled from the tip of the inner wall of the sewage inflow pipe.

In the constitution of the present invention, the annular sheet of the drainage packing is formed to have a diameter smaller than the spherical diameter of the connected spherical shape, or formed into a tubular shape with a hollow portion therein, so that the structure has an inward elastic force and enhances adhesion to the spherical structure. It is preferable to form.

In the configuration of the present invention, the lower end guide piece is preferably formed of at least two strips of strip-shaped plate members so as to induce connection to the annular sheet of condensation with the annular sheet of the drainage packing.

According to the configuration of the valve body or the valve upper body and the forming method of the valve main body in the configuration of the present invention, the mouth opening control piece may be formed of two or more members integrally or assembled with the valve upper body.

In the above configuration of the present invention, the mouth opening guide piece may be formed of two or more members integrally or assembled with the valve upper body depending on the configuration of the valve body or the valve upper body.

The sewage and seawater backflow prevention device of the present invention configured as described above is installed in a sewer pipe such as an intermediate part of a basic sewage pipe, a sewer pipe connection part of a collecting well, an intermediate part or an end part of a sewage main pipe and a trunk sewer pipe, or an agricultural waterway end part or a water gate And it is installed and used in the river sluice connected to the sea, it operates by closing the drain passage and opening the drain in the valve body as follows.

In a state in which there is no sewage discharge from the sewage discharge destination in the sewage pipe in which the present invention is installed, a float provided in the middle of the valve body acts as a drainage passage closing action by the action of the inclined float lower guide piece.

If there is no sewage discharge and no sewage flows into the sewage inlet pipe, the float is induced to roll down to the sewage inflow pipe side by its own weight on the slope of the lower guide piece of the inclined float.

When the ball is rolled down the inclined surface of the inclined bottom guide piece toward the sewage inflow pipe, the tip side of the ball is inscribed in a spherical shape concentrically on the annular sheet of the gutter packing installed near the lower end of the bottom guide piece. It is closely connected coaxially with the drainage packing, and acts as a drainage closing operation to shut off the drainage passage of the sewage inlet pipe in a watertight state.

In the drain passage closing operation state as described above, the float lifting control piece restrains the upper part of the upper center rear part of the float in an arc shape when the float receives an initial floating force by the sewage flowing into the backflow from the sewage discharge pipe side. By controlling the retreat and floating, if the backflow sewage continues and the water pressure rises, it is pushed toward the sewage inlet pipe and closes to the annular seat of the drainage packing.

According to the drainage passage closing operation of the present invention described above, the drainage passage between the sewage inflow pipe and the sewage discharge pipe is completely shut off in a watertight state, so that even if the reverse flow sewage flows from the valve body sewage discharge pipe side into the valve body, It is possible to completely prevent the backflow of the sewage and seawater by completely blocking the backflow, and also has the effect of completely blocking the inflow into the sewage inflow pipe side, which is caused by the sewage pipe line or the river side connected to the sewage discharge pipe side.

In the above drainage channel closing operation, when the discharged sewage through the drainage or the sump is introduced into the sewage inlet pipe side of the valve body, the incoming sewage discharge force acts on the distal end of the mouth connected to the annular seat at the outer end of the drainage packing. , The mouth is spaced apart from the annular sheet of the drainage packing by the sewage discharge force and pushed backward toward the middle part of the valve body, and acts as a drainage passage opening operation that rises on the inclined surface of the bottom guide piece.

In the drain passage opening operation state as described above, the drain passage opening area is variably formed in proportion to the function of the amount of discharged sewage and the discharge force, so that the sewage discharge level passing through the valve body is less than or equal to the height of the lower guide piece. When it is formed low, it acts as a partial drain passage opening operation in which the sewage flows through the periphery of the lower guide piece between the lower surface of the float and the lower portion of the inner wall in the valve body.

In addition, when the sewage discharge water level passing through the valve body is formed above the height of the lower end guide piece and the passage flow rate is increased, the float is buoyant and guided backward by the inclined float lower guide piece to the inside of the valve upper body. Ascending to some incoming state, open drainage passages wider.

In addition, when the discharge sewage is discharged in the water flow in the valve body, the buoy is subjected to high buoyancy, and the drain passage is completely opened while being fully lifted in and drawn into the valve upper body.

In the opening of the drainage passage as described above, the float raising guide piece is separated from the annular sheet of the drainage packing by the sewage discharge force and then reversed by riding the lower guide piece. By restraining the surface to the inclined surface to control the escape to the sewage discharge pipe side of the ball, it is to act to smoothly induce the inside of the valve upper body.

When the sewage discharge is gradually reduced in the opening operation of the drainage passage as described above, the float is gradually lowered from the upper part of the valve in accordance with the lower discharge level, and is again placed on the upper surface of the lower guide piece of the inclined float, and the sewage discharge is completely stopped. When the ball is rolled down toward the sewage inflow pipe side by the weight of the bottom guide piece by its own weight, the ball is reduced to the drainage channel closing operation which is closely connected coaxially to the annular sheet of the drain packing.

As described above, the sewage and seawater backflow prevention apparatus of the present invention is installed on the middle part or the end of the horizontal sewer pipe, or at the end of the agricultural channel, or in place of the water gate, on the same central axis as the central axis of the drain pipe. Since it is a configuration to be used in a straight line, compared with the inventions in which the central axis of the sewage inlet pipe and the discharge pipe has a step between the top and the bottom, conventionally installed horizontal sewer pipes, agricultural drainage lines, or drainage pipes for water gates and water gates. It can be easily installed in the middle or the end without adjusting the gradient, and even in the new construction sewage pipe, it has the effect of reducing the cost of construction and economic benefits with a quick process without the construction of the step depth gradient of the sewage inflow and discharge pipes.

In addition, according to the installation of the present invention, in the normal sewage discharge state to automatically respond to the discharge and discharge power of the discharged sewage to act as a variable drainage passage opening operation of the partial or fully open state to form a normal drainage passage,

Compared with the prior inventions in which the conventional drainage passage is formed in a curved shape, sewage and agricultural water mixed with various bulky materials have a high drainage effect that can drain more smoothly without clogging.

In addition, when there is no discharge of sewage, the drainage passage between the sewage inflow pipe and the sewage discharge pipe is completely shut off in a watertight state by automatically acting as a closing passage.

Even if the sewage pipe connected to the sewage discharge pipe of the valve body or the sewage from the river side is flowed back or the sea water is returned from the sea, the sewage drainage of the home, public and industrial facilities where the sewage is discharged, and the base sewer pipe of the basement, septic tank and various facilities, By preventing the reverse flow to the farm channel, it is possible to prevent all the flood damage caused by the reverse flow of sewage,

In addition, the odor generated from the sewage pipe side connected to the sewage discharge pipe side also has the effect of completely blocking the inflow to the sewage inlet pipe side.

In addition, according to the present invention, since the main body of the valve body and the upper body is formed in a simple moldable tubular shape and the configuration of other components is a simple configuration consisting of several belt-shaped members and one spherical mouth, the manufacturability of the mold and parts And excellent productivity and economic efficiency with low manufacturing cost, easy expansion by design change by simple dimension increase and decrease in application from small size to large size. It can be formed with quality.

The sewage and seawater backflow prevention device of the present invention as described above can obtain the same effect in application to the drainage pipes of all liquids having similar discharge characteristics as the sewage pipe in addition to the sewage pipes and the hydrology described above.

1 to 4 are shown the configuration of the sewage and backflow prevention device 100 in one embodiment of the present invention.

In the angle, reference numeral 20 denotes a sewage inlet pipe 22 connected to the inlet side sewer pipe 80 and the inlet flange 21 on the sewage drain port side, and an outlet side sewer pipe 81 and the outlet flange 23 through which the sewage is discharged. The sewage discharge pipe 24 to be displayed is a valve body of the sewage and backflow prevention device is formed integrally on the same horizontal center axis.

The inner diameter of the valve body 20 is formed to a standard equal to or larger than the inner diameter of the sewage pipe to be connected is composed of a drain passage.

The inner wall of the sewage inlet pipe 22 side of the valve body 20 is fixed from the front end thereof. Female threads 25 are formed at regular intervals.

In the middle of the valve body 20, a stainless steel float 30 of a hollow body having a diameter smaller than its inner diameter is drawn in.

The upper opening valve upper body which is connected to the upper end of the valve main body 20 has a pipe cross-sectional area that can be lifted in and out in the vertical direction and an ideal height that can accommodate the external shape as a whole, and connected in a penetrating manner. 40 is provided in an integral structure.

A male screw portion 41 is formed at an outer circumferential surface of the upper opening of the upper valve body 40, and a screw lid 45 provided with an annular packing 46 at an inner end thereof is watertightly coupled to open and close.

The inner wall portion of the valve body sewage inflow pipe 22 is provided with a male thread portion 51 screwed to the female thread portion 25 at the front end thereof, and an annular shape having an annular packing binder 52 at the rear end thereof. Drainage packing bracket 50 is installed in an internal type.

The packing binding port 52 of the drainage packing bracket 50 installed in the inner wall portion of the valve body sewage inflow pipe 22 is concentrically concentric with the inner inner wall of the sewage inflow pipe while being constrained by the annular packing binding port 52. An annular coupler 61 is formed at the distal end, and the outer end is concentrically close to the inner wall portion of the valve body 20, while the annular seat 62 is in close contact with a part of the outer surface of the subsphere. Is provided with a soft drainage packing 60 is provided.

An intermediate lower end of the inner wall portion of the valve body 20 corresponding to directly below the upper valve body 40 is supported by supporting the lower end of the float 30, and the annular sheet of the packing 30 is drained from the float 30. A two-strip strip-shaped bottom guide piece (26) (26a) formed high on the sewage discharge pipe 24 side and low on the drainage packing 60 side so as to be inductively connected to the 62 and connected to the drain passage closing operation state. These are installed at regular intervals from each other.

At the rear upper end of the sewage inlet pipe 22 of the valve body 20 and the lower boundary inner wall of the valve upper body 40, which are close to the upper end of the drainage packing 60, the sub-port 30 is a drainage packing 60. Part of the upper center rear part of the upper portion of the upper portion of the upper portion of the upper portion of the upper portion of the upper portion of the upper portion of the upper portion of the upper portion of the upper portion of the upper portion of the upper portion of the upper portion of the upper portion of the upper portion of the upper portion of the upper portion 30 Two stripe-shaped floats control pieces (27) (27a) for restraining the surface in an arc shape to control the retreat and floating of the floats 30 are provided.

On the inner upper end of the valve body sewage discharge pipe 24 and the inner wall portion of the rear end boundary of the valve upper body 40, the drain passage 30 is in close contact with the annular seat 62 of the drainage packing 60. In the state of being pushed back to the discharge sewage flowing into the sewage inlet pipe 22 in the lower portion guide piece (26) (26a) when moving backward, the upper center of the rear portion of the upper part 30 of the upper center back restrained by the inclined surface and the floats (30) Three stripe-shaped float guide pieces 28 (28a) and (28b) are provided to guide the lift of the sewage discharge pipe to the inside of the valve upper body (40).

One embodiment of the present invention, the sewage and seawater backflow prevention device configured as described above, the inlet flange and the inlet side sewage pipe 80 on the sewage drain port side with respect to the middle portion or the end portion of the basic sewage pipe or other sewage pipe passages ( 21) connected to the sewage inlet pipe 22 and the watertight structure by the adhesive, and the outlet side sewer pipe 81 where the sewage is discharged is connected to the sewage discharge pipe 24 by the outlet flange 23 to the watertight structure by the adhesive. As it is used, the sewage inflow pipe 22 and the sewage discharge pipe 24 are operated on the same horizontal center axis line as the sewage pipe, and the drainage passage in the valve body and the drainage opening operation are as follows.

If there is no sewage discharge and no sewage flows into the sewage inflow pipe 22 side, the float 30 installed in the middle of the valve body 20 has its own weight and also the above-described inclined float lower guide piece 26 (26a). By the action of, the inclined surface of the lower guide piece (26) (26a) is guided downward rolling to the sewage inlet pipe (22) side.

If the float 30 is guided down the inclined surface of the inclined float lower guide piece 26 (26a) toward the sewage inflow pipe 22 side, it is installed near the lower end of the float lower guide piece 26 (26a). A part of the tip of the fitting 30 is inscribed in a spherical shape in a concentric manner to the annular sheet 62 of the drainage packing 60, and the drainage passage closing operation to shut off the drainage passage of the sewage inflow pipe 22 in a watertight state. Acts as.

In the drain passage closing operation state as described above, when the backflow sewage flows in from the sewage discharge pipe 24 side, the buckle elevation control pieces 27 and 27a receive the initial flotation force due to the backflow sewage. At this time, the upper center of the rear portion of the central portion 30 is constrained in an arc shape to control the retreat and rise of the float 30, when the reverse flow sewage continues to increase the water pressure, the float 30 is sewage inlet pipe 22 It serves to guide the close contact with the annular sheet (62).

According to the drainage passage closing operation described above, the drainage passage between the sewage inflow pipe 22 and the sewage discharge pipe 24 is completely shut off in a watertight state, and the reverse flow sewage flows into the valve body from the valve body sewage discharge pipe 24 side. Even if it is, the backflow to the sewage inflow pipe 22 side can be completely blocked to prevent the inundation damage caused by the backflow of sewage and seawater, and also the odor generated from the sewage pipe line or the river and coast side connected to the sewage discharge pipe 24 side. It has the effect of completely blocking the inflow to the inlet pipe 22 side.

In addition, in the drainage passage opening operation as described above, the buoy ascending guide piece 28 (28a, 28b), by the sewage discharge force drawn from the sewage inlet pipe 22 side, the buoy 30 is an annular sheet of drainage packing ( When backing away from the lower guide piece (26) (26a) spaced from 62), at the distal end of the sewage discharge pipe (24) to rest the upper surface of the upper center rear part of the float 30 to the inclined surface to sewage of the float 30 While controlling the discharge to the discharge pipe 24 side, it is to act to smoothly induce the inside of the valve upper body (40).

According to the embodiment of the drainage passage opening operation of the sewage and seawater backflow prevention device 100 as described above, the center axis of the sewage inlet pipe and the discharge pipe has a step between the top and bottom, and the drainage passage is formed in a curved pipe shape. In comparison, in the normal sewage discharge condition, the drainage passage is operated in a partially or fully open state by automatically responding to the discharged and discharged power of the discharged sewage, so that sewage and agricultural water mixed with various bulky substances can be smoothly blocked. It has the effect of high drainage that can be drained easily.

When the sewage discharge is gradually reduced in the drainage passage opening operation as described above, the buckle 30 is gradually lowered from the valve upper body 40 in accordance with the lower sewage discharge level is lowered inclined float lower guide piece 26 (26a) When the sewage discharge is completely stopped, the floats 30 are induced to roll down toward the sewage inlet pipe 22 on the inclined surface of the lower guide piece 26 (26a) by its own weight. The drainage path is operated to be reduced to a drainage passage closing operation state which is coaxially closely connected to the annular sheet 62 of the drainage packing.

In the above, the configuration of a preferred embodiment according to the present invention has been presented, but the present invention is not limited to this embodiment, and those skilled in the art to which the present invention pertains are those in the technical scope of the present invention. Some configurations may be changed to improve practicality.

For example, in the configuration of the present invention, the configuration of connecting the sewage inlet pipe and the sewage discharge pipe of the valve body in the sewage pipe and the watertight structure is another embodiment of the present invention shown in Figures 5 to 7 sewage and seawater backflow prevention device 200 As shown in Fig. 2, male threads 21a and 23a are formed on the outer circumferential surfaces of the inlet flange 21 and the outlet flange 23, respectively, and on the outer surfaces of the inlet side sewer pipe 80 and the outlet side sewer pipe 81, respectively. The ring packings 82 and 82a are installed in a press-fit type, and are fitted to the rear ends of the ring packings 82 and 82a, respectively, so that the male thread portions 21a and 23a of the inlet flange 21 and the outlet flange 23 are provided. And screwed to each other, and having a screw cap (83) (83a) for pressing the ring packing (82) (82a) in a watertight structure to the pipe portion, it can be configured to be changed to a screw type binding device.

In addition, the configuration of the valve body and the valve upper body in the configuration of the present invention, as shown in another embodiment sewage and seawater backflow prevention device 200 of the present invention shown in Figures 5 to 10,

The intermediate portion is formed by the valve body 220 according to another embodiment in which a half section or more is cut out to form the through portion 221, and the packing groove 223 is formed on the outer circumference above the cut through portion 221. And a semi-circular body cover 245 having a circumferential packing 243 seated in the packing groove 223 in a watertight structure and coupled in a watertight structure, having a valve upper body 240 in another embodiment. In another embodiment, the coupling flanges 222 are formed at both horizontal ends of the cut through holes 221 of the valve body 220, and the horizontal ends of the semi-circular body cover 245 are formed at both horizontal ends of the valve body 220. The valve body and the valve upper body in a separate configuration, which forms a coupling flange 246 that is in contact with the coupling flange 222 in the upper and lower ends, and binds the two coupling flanges 222 and 246 with the bolt nuts 229. It can also be carried out.

In addition, in the configuration of another embodiment of the sewage and seawater backflow prevention device 200 of the present invention in which the valve body and the valve upper body are separately formed as described above, the configuration of the float lifting control piece is different from that of the other embodiment valve upper body 240. Another embodiment is formed integrally with the front inner lower end portion of the lifting control piece 247 (247a),

The structure of the float lifting guide piece may be implemented by the configuration of another embodiment float lifting guide pieces 228 and 228a formed integrally with the rear inner bottom of the valve upper body 240 of another embodiment.

In addition, in the configuration in which the valve body and the valve upper body are formed separately in the configuration of the present invention, as in the configuration of another embodiment of the detachable valve upper body 340 shown in FIG. Can be implemented in a hermetic configuration in which the hard plate 341 is integrally formed.

In addition, even in the case where the valve body and the valve upper body are formed in any of the integrated or separate configuration in the configuration of the present invention, the other embodiments of the valve upper body 440, 540, 640 shown in Figs. As in the cross-sectional view, the flat cross-sectional shape can be implemented in an oval shape, a square shape, or a polygonal shape.

In addition, in the configuration in which the valve upper body is formed to be open in the configuration of the present invention, and the water-tight lid is opened and closed, the watertight coupling structure of the valve upper body and the lid is a screw type shown according to the shape or capacity of the pipe section of the valve upper body. In addition to the structure, it can be carried out by flange coupling to be bolted together.

1 is a cross-sectional configuration of an embodiment sewage and seawater backflow prevention device of the present invention

FIG. 2 is a side cross-sectional view taken along line A-A in FIG. 1; FIG.

3 is a side cross-sectional view taken along line B-B in the configuration of FIG.

4 is a cross-sectional view taken along line C-C in the configuration of FIG.

Figure 5 is an exploded view of another embodiment sewage and seawater backflow prevention device of the present invention

Figure 6 is a plan view of the valve body of the configuration of another embodiment sewage and seawater backflow prevention device of the present invention

Figure 7 is an assembly cross-sectional view of another embodiment sewage and seawater backflow prevention device of the present invention

FIG. 8 is a side cross-sectional view taken along the line D-D of the configuration of FIG. 7; FIG.

FIG. 9 is a side cross-sectional view taken along line E-E in FIG. 7; FIG.

FIG. 10 is a side cross-sectional view of the assembly view taken along line F-F cutting section in the configuration of FIG. 7; FIG.

11 is a sectional view showing the structure of a valve upper body according to still another embodiment of the present invention.

delete

12 is a sectional view of the tube of another embodiment of the valve body of the present invention;

Fig. 13 is a sectional view of the tube of another embodiment of the valve body of the present invention;

14 is a sectional view of the tube of the valve body according to still another embodiment of the present invention.

(Short description of symbols for important parts of drawing)

100: one embodiment of the present invention sewage and backflow prevention device

20: valve body 21: inlet flange 22: sewage inlet pipe

21a, 23a: Male threads of the inlet flange 21 and the outlet flange 23

23: outlet flange 24: sewage discharge pipe

25: female thread 26,26a of sewage inlet: 2-line strip bottom guide

27, 27a: 2-line strip type float lifting control piece

28,28a, 28b: Three-striped strip Spanning guide 30: Bubble

40: upper opening valve upper body 41: male thread 45: screw cap

46: annular packing 50: annular drainage packing bracket 51: male thread

52: packing binding hole 60: drainage packing 61: ring type coupling

62: annular sheet 80: inlet side sewer pipe 81: outlet side sewer pipe

82,82a: Ring packing 83,83a: Screw cap

200: another embodiment of the present invention sewage and seawater backflow prevention device

220: valve body 221 of another embodiment: through hole 222: coupling flange

223: Packing groove 229: Bolt nut
228,228a: Other EmbodimentsHot Guide Lift 240: Other Embodiments Valve Upper Body

243: circumference packing 245: semicircular arc body cover

246: coupling flange

227, 227a: Other embodiment Float lifting control piece

340: Another Example Removable Valve Upper Body 341: Hard Plate

440,540,640: Another Example Valve Upper Body of Elliptical, Square, Hexagonal Cross Section

Claims (6)

A valve body having a circular cross section formed on one side of the same horizontal center axis as a sewage inlet pipe and the other end of the sewage discharge pipe; A mouthpiece which is installed into the middle of the valve body and whose outer diameter is smaller than the inner diameter of the valve body; A vertical tube or inclined tube upper body connected to the upper end of the valve body in a vertical direction in which the sub-port can be lifted up and down in a vertical direction and a water-tight structure with a height higher than that can accommodate the sub-ball as a whole; An annular drainage packing bracket having an integral or prefabricated fixed structure with the sewer inlet pipe side inner wall part of the valve body and having a binding portion for confining the drainage packing described later at the rear end; ; The outer end has a coupling hole of an annular or oval structure that is constrained to the drainage packing bracket and is connected to the inner wall of the sewage inlet pipe of the valve body in a watertight state, and the inner end is concentrically concentric with the inner inner wall of the sewage inlet pipe. A soft drainage packing having a circular sheet in close proximity to a portion of the outer surface of the subsphere and in an elliptical shape intersecting the adjacent annular or central axis at an oblique angle; At the lower end of the inner wall portion of the corresponding valve body directly below the upper valve body, the lower end of the buckle is supported and supported, and the buckle is intimately connected to the annular seat of the drainage packing to be connected in a drain passage closing state. A sewage discharge pipe side is high, and a lower portion of the strip-shaped mouth portion guide is formed at the drainage packing side; When the ball is initially suspended by the sewage flowing back from the sewage discharge pipe side in the drain passage closing operation state in which the ball is closely connected to the annular sheet of the drain packing, A float lifting control piece protruding from an inner wall portion of the lower boundary of the inlet pipe rear end of the valve body and the valve upper body so as to control the retreat and floating of the float; When the ball is pushed back through the lower guide piece of the ball by being pushed by the discharge sewage flowing into the sewage inlet pipe in the drain passage closing operation state which is closely connected with the annular sheet of the drain packing, the upper part of the upper center rear part of the ball is restrained by the inclined surface. A float raising guide piece protruding from the upper portion of the sewage discharge pipe of the valve body and the rear end boundary inner wall of the valve upper body to guide the floating of the float to the upper portion of the valve body while controlling the separation to the sewage discharge pipe side; Sewage and seawater backflow prevention device characterized in that it comprises a. The sewage and seawater backflow prevention device according to claim 1, wherein the upper valve body is formed in a watertight structure by an open / close lid of any one of flange coupling and screw coupling. 2. The sewage and seawater backflow prevention device according to claim 1, wherein the valve upper body is formed in a separable type whose upper end portion is formed of a closed hard plate portion and is assembled in a watertight structure with respect to the valve body. The sewage and seawater backflow prevention device according to claim 1, wherein the valve upper body is configured in one form of a cross section of a circular or elliptical shape and a square shape. The sewage packing according to claim 1, wherein the drainage packing is composed of any one of a monolithic wheel structure protruding annularly in the inner wall portion of the sewage inlet pipe, or a separable type assembled from the distal end of the inner wall of the sewage inlet pipe. And seawater backflow prevention devices. The sewer and seawater backflow prevention device according to claim 1, wherein the lower guide piece is formed of at least two strips of strip-shaped plate members so as to induce connection with the annular sheet of the drainage packing concentrically.

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