Patent Publication Number: US-2019194921-A1

Title: Reinforcement valve for preventing backflow in drain trap

Description:
TECHNICAL FIELD 
     This invention can greatly contribute to the quality and performance improvement of the drainage trap in that it can be added to the interior of the drainage trap and can strengthen the performance of the air backflow prevention function required for the drainage trap. In addition, this invention is about the reinforcement valves for preventing backflow of the drain trap, which always perform the best backflow shutoff function regardless of the strong air pressure generated inside the drain pipe (incoming or exiting the air) and its changes. 
     BACKGROUND TECHNOLOGY 
     Drainage traps are usually installed to prevent harmful insects that may enter through a drainpipe, and odour caused by decomposition or decomposition of the dirt and grease attached to the inner wall of the drainpipe. drainage traps are one of the essential parts of the drainpipes of multi-generation houses such as apartments and villas (bathroom drains, sink drain pipes, laundry drain pipes, etc.). 
     The basic structure of this drainage trap forms a water gathering portion ( 20 ) on the underside of the trap body ( 10 ), where a certain amount of water may be pooled. One side and the other on the upper side of the water gathering portion ( 20 ) above mentioned includes the water inlet ( 31 ) within the drain pipe ( 30 ) to allow the drainage of water to flow in. In addition, a drainpipe ( 40 ) containing a water outlet ( 41 ) is connected to allow the inflow of water to be discharged outwards. In particular, the forward part of the water inlet ( 31 ) above mentioned is submerged to a certain depth from the surface of the water held in the water gathering portion ( 20 ). The structure commonly consists of a barrier ( 60 ) with a constant size of the water drain hole ( 51 ) open on the lower part of the blockage that is simultaneously submerged. 
     To explain the basic principle related to prevention of backflow of drainage traps with this structure, drainage traps allow water to flow out naturally during drainage, but after drainage of water, a certain amount of water automatically thickens in the water gathering portion and a barrier is installed. This is a structure in which, in principle, backflow of air containing odour is automatically blocked after drainage. 
     However, drainage traps may present the phenomenon of air entering the interior of the drainage trap or the phenomenon of the internal air of the drainage trap escaping outwards in the process of rapid drainage of water. This can be especially serious if it is a drainage trap installed in a drainage system that is installed in a multi-generation house, such as an apartment complex, that is occupied by several generations (see diagram  8 ). 
     Specifically, multiple drains (earth pipes) from large diameter tubes to each generation are combined in multi-stage. This can cause rapid changes in airflow and pressure within the drainage trap connected to the branch. Especially in the morning and evening hours, when water is used a lot for each generation, a sudden higher pressure may occur at some point, resulting in more pressure changes within the drainage trap. 
     This phenomenon causes damage that invoke unwanted odors to rise, causing serious turbulence in the water gathering portion. It bears the problem of going against the basic principle of drainage traps, which is to hold water together, blocking the reverse flow of air. 
     In other words, drainage traps cannot in principle reverse the flow of air containing odors because the water is stagnant and partly obscured by a blocking membrane, but if a momentary high-pressure air flow (incoming or exiting air) occurs, the water resistance (inflowing or exiting of the water) will be severely leaked and the water will not be submerged and the air exposed to the outside will be reversed. 
     It may have little effect on the pressure inside the drainage trap due to the lack of generations and the small number of detached houses or villas with very few generations. However, in cases where pressure changes are extreme (such as apartments with large households, multi-generation houses, villas, officetels, buildings, etc.) due to the large number of generations and very large use of water, the problem of backflow odour may continue to emerge even though ordinary drainage traps have been installed. 
     To address this, it is common to resolve a particular device for preventing reflux in drainage traps by installing additional devices or devices for preventing individual reversals for each generation of drains. 
     However, the installation of individual backflow prevention tools or devices on each of the multiple drains in each generation will result in other problems, such as unnecessary expense and huge waste of time and labor due to installation, as well as hampering the function of smooth drainage. This is why a fundamental alternative is desperately needed. 
     CONTENT OF THE INVENTION 
     Task to be Solved 
     Thus, in this invention, unlike the previous practice where changes in air pressure in a drainage trap are caused by severe changes in the air pressure due to various causes (the characteristics of a multi-generation apartment complex), the automatic adjustment in response to changes in air pressure is newly intervened so as not to be opened arbitrarily except for the drainage of water, thus providing a ground-breaking method for reverse flow of bad odor. 
     Means of Task Resolution 
     The usual drainage traps for this invention to achieve the above technical tasks were as follows: First, the water gathering portion ( 20 ) were formed at the bottom of the trap body ( 10 ). One side and the other were connected to the inflow-side drain tube ( 30 ) and the discharged-side drain tube ( 40 ). A blocking membrane ( 60 ) was constructed between the water inflow opening ( 31 ) mentioned above and the water discharge opening ( 41 ). Between the inside floor of the blocking membrane ( 60 ) mentioned above and trap body ( 10 ), a water drain hole ( 51 ) was drilled. In this ordinary drainage trap, the water blocking membrane ( 60 ) in front of which the water drain hole ( 51 ) was formed was automatically opened according to the pressure of the water when the water was drained from the corresponding generation, allowing drainage but automatically closing by the weight of the water after drainage was completed. A backflow-preventing reinforcement valve ( 100 ) developed in this invention was closed and controlled so that strong air flow into the drainage trap does not cause a reflux of air. 
     Effect of the Invention 
     The backflow-preventing reinforcement valve of this invention drain trap, such as this one, is opened by water pressure at the time of drainage to allow drainage whereas after drainage, there is no change in air pressure and no strong pressure is introduced into the drain trap (A). In addition, regardless of any changes in air, such as high pressure or high air intake, the closing effect of the backflow-preventing reinforcement valve ( 100 ) remains secured. This ensures more complete functions to prevent backflow of air, including odour thus making this invention a highly anticipated. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWING 
       Drawing  1  shows the internal structure of a typical drainage trap. 
       Drawing  2  shows the structure of the drainage trap with the name of the backflow-preventing reinforcement valve ( 100 ) for reverse flow prevention as proposed in this invention. 
       Drawing  3  shows the structure diagram showing an example of the backflow-preventing reinforcement valve ( 100 ) for reverse flow prevention provided in this invention 
       Drawing  4  shows another example of the backflow-preventing reinforcement valve ( 100 ) is shown in this invention. 
       Drawing  5  shows another example of the backflow-preventing reinforcement valve ( 100 ) is shown in this invention. 
       Drawing  6  presents a perspective view of the Drawing  5   
       Drawing  7  is a sectional perspective view of the Drawing  6   
       Drawing  8  is a reference drawing to multi-stage installation of branch pipe and drainage traps in standpipes. 
     
    
    
     SPECIFICATION TO CARRY OUT THE INVENTION 
     On the underside of the trap body ( 10 ), a water gathering portion ( 20 ), which can hold a certain amount of water, is formed. On one side of the upper part of the water gathering portion ( 20 ) mentioned above and on the other side, the inflow-side drain tube ( 30 ) containing a water inflow opening ( 31 ) and a discharged-side drain tube ( 40 ) containing a water discharge opening ( 41 ) are connected so that it can be discharged from the outside. Between the above water inflow opening ( 31 ) and the water discharge opening ( 41 ), there is a blocking membrane ( 60 ) locked to a certain depth from the surface of the water in the water gathering portion ( 20 ), and a water drain hole ( 51 ) of a certain size is drilled between the inner floor of the blocking membrane ( 60 ) and the trap body ( 10 ). Accordingly, it is normally a drainage trap that prevents reverse flow of odour due to the water that has been steamed in the water gathering portion ( 20 ) above. 
     On the front of the blocking membrane ( 60 ) formed by the water drain hole ( 51 ) mentioned above was characterized by the installation of an additional backflow-preventing reinforcement valve ( 100 ), which automatically opens according to the pressure of the water when the water is drained from the corresponding generation, allowing drainage but automatically closes by the gravity after drainage was completed, to prevent a strong flow of air into the drain trap from appearing. 
     Drawings “ 70 ” and “ 71 ” of the attached drawings shall be those for inspection tools and their lid joining screws that are opened and used when internal repair or inspection is required. 
     In addition, the backflow-preventing reinforcement valve ( 100 ) mentioned above may be made of various materials such as metal or plastic. Individual support joint ( 61 ,  101 ) drilled with the hinge holes ( 61   a,    101   a ) shall be constructed at the blocking membrane ( 60 ) of the upper body and the corresponding location and each support joint shall be fitted together thus to complete hinge combination structure, a hinge pin ( 102 ) is inserted to allow free rotational motion. 
     Therefore, the backflow-preventing reinforcement valve ( 100 ) allows drainage by automatically opening the water pressure when water enters through the water inflow opening ( 31 ) mentioned above, but when drainage is finished, the water drain hole ( 51 ) is blocked by the magnetic pressure, thus preventing the backflow of air containing the odor from entering the drain trap (A) more completely. 
     In other words, when strong air pressure was introduced into the drainage trap (A), the pooled water would severely flow for the water resistance to be overcame and the air (including the odour) was often reversed. 
     If the backflow-preventing reinforcement valve ( 100 ) mentioned above is installed to automatically block the water drain hole ( 51 ) as shown above, the pressure of the water drain trap (A) will push the pressure of the backflow-preventing reinforcement valve ( 100 ) to make it more tight. For this reason, it is a useful invention that, even if strong air pressure is introduced into the drainage trap (A), backflow of air cannot appear in principle, and the damage caused by backflow can also be prevented more effectively. 
     However, the backflow-preventing reinforcement valve ( 100 ) is closed more strongly by the pressure in the drain trap and cannot show a reverse flow. 
     Conversely, if the strong suction force is exerted by the flow of air flowing outward (internal to external), rather than by the introduction of air pressure; 
     Depending on the suction force, the backflow-preventing reinforcement valve ( 100 ) is temporarily opened to the suction force, and reflux phenomenon can occur. 
     Therefore, in this invention, the backflow-preventing reinforcement valve ( 100 ) can be conceived as mentioned above. 
     As illustrated in drawing  3 , the outer perimeter is formed with a cover of consistent thickness ( 111 ) and configured with the empty vent ( 110 ) therein continuous volume of inner cavity ( 112 ) assigned to the enclosed interior. 
     At the top of the upper section of the empty vent ( 110 ) mentioned above, the suction force groove ( 120 ) allows the suction force to affect the inner cavity ( 112 ) of the backflow-preventing reinforcement valve ( 100 ) mentioned above. 
     The design of the lower part of the upper part of the empty vent ( 110 ) may be more desirable if the structure is designed with a water inlet groove ( 130 ) that provides a certain amount of water to flow into the inner cavity ( 112 ), depending on the suction force. 
     In this case, if a strong suction force of air in the drain trap (A) affects the inlet force groove ( 120 ) at the top of the empty vent ( 110 ) above mentioned, the weight of the backflow-preventing reinforcement valve ( 100 ) for preventing reflux will be increased through the bottom of the water inflow groove ( 130 ), thus increasing the weight of the backflow-preventing reinforcement valve ( 100 ), while also offsetting the intake force of the water from flowing more tightly back into the backflow-preventing reinforcement valve ( 100 ). 
     Even if a strong suction force of air is generated within the drainage trap (A), the possibilities of the backflow-preventing reinforcement valve ( 100 ) to be opened and the reflux of the air including the odour to be occurred are fundamentally and completely prevented in this invention. 
     In the end, the backflow-preventing reinforcement valve ( 100 ) is configured as a rapid empty vent ( 110 ) assigned with an inner cavity ( 112 ). The structure of that is formed by placing the suction force groove ( 120 ) and the water inflow groove ( 130 ) respectively at the top and bottom of the valve. 
     The backflow-preventing reinforcement valve ( 100 ) is opened only upon drainage. Regardless of the absence of changes in the air pressure after drainage as well as a sudden amount of strong air flow is introduced to the drainage trap (A) or a strong suction force of the air occurs, the closing effect of the backflow-preventing reinforcement valve ( 100 ) always remains to be maintained and prevent potential damages of odour exposure from the fundamental phase. 
     Furthermore, the suction force groove ( 120 ) formed on the front top of the empty vent ( 110 ) and the water inflow groove ( 130 ) formed at the bottom of the suction force groove ( 120 ) allocated to the inner cavity ( 112 ) was formed to form larger water inflow groove ( 130 ) than the corresponding suction force groove ( 120 ) to make the water flow through the stream flow groove ( 130 ) more efficient. 
     Inside the suction force groove ( 120 ) allocated to the inner cavity ( 112 ) mentioned above and water flow groove ( 130 ) are blocked by a pair of compartment membrane ( 140 , 140 ′) to create a water suction induced section ( 141 ), which induces the suction force, which is more effective and faster to achieve 
     In addition, if a compartment membrane ( 140 , 140 ′) is closed between the suction force groove ( 120 ) and the water inflow grooves ( 130 ) to induce the suction force and to form a water suction induced section ( 141 ) for better water reduction, 
     On the upper and lower parts of the empty vent ( 110 ), more than one of additional water inlet ( 140 ) and the air hole ( 150 ) are to be installed besides the existence of suction force groove ( 120 ) mentioned above and water inflow groove ( 130 ). The water inlet and the air hole are constructed to the rest of the inner cavity ( 112 ) inside the empty vent ( 110 ). 
     As a certain amount of water is filled in the remaining inner cavity ( 112 ) inside the empty vent ( 110 ), excluding the water suction induced section ( 141 ), the weight is added to prevent the opening of backflow-preventing reinforcement valve ( 100 ). At the same time, when the reinforcement valve ( 100 ) for preventing backflow opens due to water pressure during drainage, the weight is reduced to increase the efficiency of the opening. After drainage, when the reinforcement valve ( 100 ) for prevention of backflow is closed, the water is re-inflated and the closing function can be performed more effectively by increasing the weight. 
     In other words, the water outlet ( 140 ) and the air hole ( 150 ) may act in part when a high pressure air is introduced or a strong intake force of air is generated, but rather, when the backflow-preventing reinforcement valve ( 100 ) is opened and closed, water is discharged (intensified and buoyant) and the inflow (increased) to maximize the heat and closing efficiency. 
     As described, the backflow-preventing reinforcement valve of the drainage trap of this invention is opened by water pressure during drainage, allowing drainage. 
     Regardless of any changes in air pressure after the drainage has been completed, as well as the introduction of strong pressure into the drainage trap (A), or the occurrence of strong intake force of air, 
     Since the closing function of the backflow-preventing reinforcement valve ( 100 ) mentioned above can always be maintained, it is a useful invention that can be equipped with the counterflow prevention function of air containing odour more perfectly. 
     Moreover, it is a useful invention to prevent damage caused by odour by automatically sucking the corresponding amount of water from the pressure to maintain the closing force, especially when the pressure is applied. 
     EXPLANATION ON DRAWINGS 
       
     
       
         
           
               
               
             
               
                   
               
             
            
               
                 10: a trap body 
                 20: a water gathering portion 
               
               
                 31: Inlet 
                 30: Inflow Side Drainage 
               
               
                 41: Water drain 
                 40: District pipe on the discharge side 
               
               
                 20: Materials 
                 60: Cut-off 
               
               
                 51: Water Drainage Hall 
                 100: a backflow-preventing 
               
               
                   
                 reinforcement valve