TWI277684B - Automatic gas isolating device for preventing backflow of bacteria-containing, toxicant gas - Google Patents

Abstract

Disclosed is an automatic gas isolating device for preventing backflow of a bacteria-containing toxicant gas, comprising a water-draining gas-isolating barrel; a water drain pipe mounted in an upward inclined manner to surrounding wall of a water drain hole; a buoy movably received in the water-draining gas-isolating barrel; and a support member. The buoy of the present invention can float upward and downward inside the water-draining gas-isolating barrel with the change of water surface level. When the buoy is located at a position above a lower edge of the water drain hole, water contained in the water drain pipe and the water-draining gas-isolating barrel provides primary protection against reversal flow of gas and insets and bacteria entering into the automatic gas isolating device. When the water inside the water drain pipe evaporates to cause the buoy to lower down to close the water drain hole, secondary protection against soil water and reversal flow of gas is ensured. The present invention is provided with respect to prevention of backflow of contaminated air and prevention or reduction of transmission of non-typical virus inside the water drain pipe and is helpful for health caring of human and animals.

Description

1277684 IX. Description of the Invention: [Technical Field] The present invention relates to a gas barrier device, and more particularly to an automatic gas barrier device for preventing backflow of bacteria and toxic gases. [Previous technology] In view of the occurrence and spread of influenza and SARS in Asia and some countries and regions in Asia and the United States in late 2002 and 2003, thousands of individuals have taken the lives of their lives to bring irreparable damage to society and some families. To Hong Kong residents, Φ said that they will not forget the chain reaction caused by the outbreak of SARS in various parts of Hong Kong in 2003. At that time, all corners of the urban area, each building and every unit were repeatedly repeated. The SARS bacteria or viruses that occurred in Amoy Gardens in Kowloon Bay, Hong Kong were typical. This is because there is no good gas trap in some buildings or units of drainage pipes, the gas will flow backwards, and the suction of the indoor exhaust fan, the gas of the SARS virus is discharged to the outside to meet the power of the air and accelerate the spread. And some residents around the building or unit were unwittingly attacked by ruthless flu and SARS coronavirus.

Although there are many kinds of gas barriers used in the drainage pipeline to prevent backflow of sewage and odors, there are still some shortcomings in using them as backflows or counterfeiting of SARS virus gases like influenza and SARS. . For example, in the publication of Chinese Patent Application No. CN 8 7 1 0 1 8 44 A, an anti-reverse water sealing valve is disclosed. The anti-reverse water sealing valve is used for a pool box, which is composed of a floating ball valve, a water sealing chamber and an inlet and outlet receiving joint. When the overflow water flows from the inlet nozzle to the outlet, the floating ball of the floating ball valve is seated on the bracket. The overflow water is allowed to pass freely, and a water seal is formed in the lower part of the water seal chamber with a reasonable depth of 1274864 to prevent the odor in the exhaust system from entering the tank box. However, the water in the water seal chamber of the device will cause harmful gases to enter the upper portion of the water seal chamber after being evaporated by evaporation. When it encounters sewage or gas backflow, it will collide with the sewage into the pool box. - An automatic closed deodorant drainer is disclosed in Chinese Utility Model No. 03212114.8. The drainer is composed of a section of the casing installed in the down pipe and a closing valve installed in the casing, wherein the lower part of the casing has a slanted lower opening, and a seat is fixed on the outer eccentric side thereof, and the closing valve The utility model comprises a valve piece which is rotatably mounted on the support, a lower opening for opening and closing the casing, and a weight body which is disposed on the free end of the valve piece near the side of the support. As the water flows into the casing, the valve is pushed down by its gravity to open the lower opening; after the water flows, the valve automatically closes the lower opening of the casing by the weight.

A deodorizing device for a drain port having a cylinder and a check valve disposed in the cylinder, wherein the check valve includes a A T-shaped valve body, a valve seat fixed in the cylinder, an arched bracket mounted on both sides of the valve seat, and a spring. The valve body passes through the vertical rod portion through the valve hole of the valve seat and the hole of the bracket, and the spring is fitted on the vertical rod portion passing through the bracket, so that the valve body can make the horizontal portion of the valve body from the elastic force of the spring The bottom-up elastically covers the valve hole of the valve seat. The deodorizing device is installed in the drain pipe under the drain through the cylinder. When draining, the gravity of the water pushes down the horizontal part of the valve body to open the valve hole and discharge to the sewer. When the water flow stops, the spring is Under the action of elastic force, 'lift the valve to close the valve hole. The above two devices are mainly used to prevent backflow of sewage and cannot effectively prevent backflow of gas from 1277684. Therefore, up to now, there has been no satisfactory anti-odor or gas trap in the conventional drainage system to strictly prevent the automatic switch-type protection device containing bacteria and toxic gas backflow. SUMMARY OF THE INVENTION The object of the present invention is to provide an automatic gas barrier device for preventing backflow of bacteria and toxic gases, which has an effect of effectively preventing or reducing the backflow of the gas in the drain pipe. Layer automatic switch protection.

The technical solution for achieving the above object is an automatic gas trap device for preventing backflow of bacteria and toxic gas, comprising: a drain air trap 'the water trap is provided with a water inlet' with an air outlet on the top surface thereof, and a circumferential surface There is a water outlet; a water inlet pipe, which is a straight pipe and is connected to the water inlet of the liquid and drainage air separator

a water outlet pipe which is installed obliquely upward on the wall around the water outlet; a float valve movably mounted in the drain air trap; and a support member having a central hole which is installed through the center hole On the inlet pipe below the float valve, and horizontally below the position of the outlet. An automatic gas barrier device as described above, wherein the height of the float valve is greater than the diameter of the water outlet, and when the float valve is moved down to the position against the holder, it partially closes the entire water outlet. An automatic gas barrier device as described above, wherein an exhaust valve is disposed in an air outlet of the drain air trap. An automatic gas barrier device as described above, wherein the outlet pipe is inclined at an angle of 20 to 80° with respect to a center line of the row -7 - 1277684 water trap. An automatic gas barrier device as described above, wherein the outlet pipe has an optimum inclination angle of 45°. The automatic gas barrier device as described above, wherein the automatic gas barrier device further comprises a holding tube, the inner wall of the holding tube is provided with an internal thread, and the outer wall of the lower portion of the water inlet tube is provided The external thread, therefore, the retaining tube can be screwed to the lower portion of the inlet pipe to hold the bracket in a position. As described above, the automatic gas trap has a free Φ end of the outlet pipe that is separated from the drain A vertical joint portion of the center line of the gas cylinder. The automatic gas trap device as described above, wherein the portion of the cylinder of the drain air trap below the pallet can be formed as a detachable mating connection structure with the upper portion thereof, including a thread or The concave and convex parts and the rubber sealing ring. It can be seen from the above that the automatic gas trap device of the invention has a well-designed floating valve, which can synchronously fall up and down in the drainage air trap with the level of the water level, and the floating valve is lowered to the inner wall setting. When the edge position is designed, it is designed to support the float valve.

With the face element, you can just close the water outlet completely. In the device, the vertical side of the side wall of the drainage trap is designed with an outlet pipe of an angle of 45 5 which is optimal for preventing the gas from backflowing and pest bacteria into the first aspect. Protection, and the stored water in the drain trap can protect the second aspect of the entry of gas backflow and pest bacteria. The protection of the first and second aspects constitutes the first layer of protection of the present invention. On the other hand, when the water in the outlet pipe evaporates, the float valve will close the water outlet as the water level automatically drops to the edge set by the inner wall, preventing the sewage and gas from flowing back, forming a second layer of protection. The invention is designed to prevent backflow of exhaust gas and prevent or reduce the spread of atypical viruses in the 1277684 drain pipe, and has a good and reliable protection effect on human and animal health. [Embodiment] - Referring to Fig. 1, Fig. 1 shows an automatic gas barrier device for preventing backflow of bacteria and toxic gases of the present invention as an embodiment. The automatic gas trap comprises a drain trap 1, an inlet pipe 2, an outlet pipe 3, a float valve 4, a pallet 5 as a carrier and an exhaust valve 6, which can be made of plastic and/or metal. production. In the device, the drain trap 1 is a closed container and is provided with a water inlet 'having a central circular hole on its top surface and an air outlet 11 beside the central circular hole, and a peripheral surface 11 is provided on the peripheral surface thereof. Water outlet 12. The water inlet pipe 2 is a straight pipe which is partially inserted or extended vertically through the central circular hole of the drain air trap 1 and is hermetically sealed in the drain gas trap 1 in a suspended manner. In the state of use, the water inlet pipe 2 is connected to the water inlet pipe (not shown).

The outlet pipe 3 is fixed to the wall surface around the water outlet 1 2 of the drain air trap 1 and is attached with an upward tilting manner, and the inclination angle of the center line of the drain trap 1 is 20 to 80. The best is 4 5 . . On the other hand, a joint portion 3 1 may be provided at the free end of the outlet pipe 3, the center line of which is perpendicular to the center line of the drain trap 1. The outlet pipe 3 can be connected to the sewage drainage pipe (not shown) through the joint portion 31. The float valve 4 is circular and can be made hollow or solid, and an axial hole is provided in the center thereof. The axial hole can be mounted on the water inlet pipe 2 so as to be movable up and down. The pallet 5 as a carrier has a center hole and a plurality of flow holes 51 arranged around the center hole. It is mounted through the central bore on the inlet pipe 2 below the float valve*, 1277684 and is fixedly positioned on the lower edge of the water outlet 12 in a manner parallel to the lower surface of the float valve 4. In the present embodiment, the height of the float valve 4 should be equal to or larger than the diameter of the water outlet 12, so that the water outlet 1 can be just right when the float valve 4 is moved down the inlet pipe 2 to a position against the pallet 5. 2 closed. The exhaust valve 6 is mounted on the air outlet 1 1 on the top surface of the drain air trap 1 for removing the gas pressurized in the upper chamber of the float valve when the float valve 4 is moved upward rapidly.

Referring to Fig. 1, in order to facilitate the maintenance of the upper floating valve 4, the pallet 5 and the upper wall in the drain trap, a detachable screw connection mechanism may be provided at the lower portion of the water inlet pipe 2 below the pallet 5. The threaded connection mechanism includes an external thread provided on the outer wall of the water inlet pipe 2 and an additional inner threaded retaining pipe. The retaining tube can be screwed to the lower portion of the inlet pipe 2. In addition to the disassembly of the float valve 4 and the pallet 5 during maintenance, the threaded connection mechanism can also adjust the position of the pallet 5 on the water inlet pipe 2 as necessary. In addition, in order to clean the debris and sand deposited at the bottom of the drainage trap 1 during the drainage process, the lower portion of the drainage trap 1 can be made into a detachable connecting structure 8, for example, the upper thread can be matched with the thread, and the concave and convex interface can be added. The upper rubber gasket (not shown) is sealed and connected to fix and quickly disassemble the float valve. Repairing and cleaning the upper wall of the drain trap does not affect the backflow and effluent of the barrier gas. Referring to Figures 2a to 2d, respectively, the operation or state of the four stages of drainage, stationary, drying and recovery of a specific embodiment of the automatic gas barrier device of the present invention is shown. In Figure 2a, the normal drainage operation is shown. When draining, water flows from the inlet of the upper end of the inlet pipe 2 into the lower casing of the drain trap 1, and -10- 1277684 water accumulates therein to a certain height and flows through the flow hole 5 1 of the pallet 5 and pushes the float valve 4 Move upwards, move or float upwards in the float valve 4, so that the water outlet 12 can be gradually opened completely, and the water flows out from the water outlet pipe 3 and is discharged to the sewage water pipe. As shown in the figure, when draining, the float valve can float up to the position of the outlet - 12 or more. In Fig. 2b, the stationary state in which no water is discharged is shown. When the water is not drained, the float valve 4 is maintained at the position above the water outlet 1 2 and the drain trap 1 and the outlet pipe 3 below the float valve 4 under the buoyancy of water, and the water maintains the same height within its Φ. And the horizontal plane (indicated by the arrow A) is higher than the water outlet 12, so that the water in the outlet pipe 3 serves as a protection against the first aspect of the gas backflow, and the water in the drainage trap 1 prevents the gas from flowing backwards. The protective effect of the second aspect is indicated by arrow B. The first and second aspects of the gas barrier protection formed by water are collectively referred to as the first layer of automatic protection. In Fig. 2c, the state in which water evaporates due to the weather is shown. In the quiescent state of undrained or undischarged water, the water in the outlet pipe 3 and the drain trap 1 will continue to evaporate until the water in the air trap 1 is completely dried. At this time, the water level of the Φ drain trap 1 will drop. The float valve 4 will move down as the water level decreases. When the water level drops to the position of the pallet 5, the float valve 4 will completely close the water outlet to prevent backflow of gas. This function of the air-tight protection C by the float valve 4 is called the second layer automatic protection. In Figure 2d, the operation of the return drain is shown. This is to drain the water in the case where the water of the outlet pipe 3 is completely dry, but the drainage operation is the same as the drainage operation described in Fig. 3a, and will not be described again in Fig. 2a to Fig. 2d. In the middle, arrows a and b indicate the direction of the water flow. -11- 1277684 Arrows C and d indicate the direction of movement of the float valve. The arrows e and f indicate the direction in which the gas can be prevented from flowing backward. Referring to Figures 3a to 3d, respectively, the operation or state of the four stages of drainage, stationary, drying and recovery of another embodiment of the automatic gas barrier device of the present invention is shown.

In Figure 3a, the normal drainage operation is shown. When draining, water flows from the inlet of the inlet pipe 22 into the U-bend and accumulates therein, and once it reaches a certain height, the float valve 14 is pushed upward. During the upward movement or floating of the float valve, air is discharged from the exhaust valve 16 and water is discharged from the outlet pipe 13 and discharged to the sewage drain pipe. As shown in Figure 3a, the float valve can float up to the outlet 1 1 2 and close the exhaust valve 16 so that the water does not drain from the exhaust port of the exhaust valve 16. In Fig. 3b, a stationary state in which no water is discharged is shown. When the water is not drained, the float trap 14 is kept at the position above the water outlet 1 1 2 and the drain trap 2 1 and the outlet pipe 13 below the float valve 14 under the buoyancy of water, and the water remains the same in the water. The height and horizontal plane (indicated by arrow A) are higher than the water outlet 1 1 2 . In this way, the water in the outlet pipe 13 serves as the first layer of automatic protection. Please refer to the above. In Figure 3c, the state after evaporation of moisture is shown. When the water level in the drain trap 2 1 drops due to evaporation, the float valve 14 will move down as the water level drops. A support ring 15 as a carrier is placed in the pipe. When the water level drops to the position of the support ring 15, the float valve 14 will completely close the water outlet 1 1 2 to prevent backflow of gas and to provide automatic protection of the second layer. -12- 1277684 In Figure 3d, the operation of the return drain is shown. Details can be found in Figure 3a. The automatic gas barrier device of the present invention is designed based on the buoyancy of the float valve 4 in water and the gravity of the body. When draining, the float valve floats through the buoyancy of the water to allow the water to flow naturally through its drain trap and outlet pipe and out to the outdoor sewage drain pipe or throat. When the water is not introduced into the automatic gas trap for a long period of time, the drain trap and the outlet pipe of the automatic gas trap have a certain amount of water stored, and the gas is used to prevent the gas from flowing back to the room from the outside. When the water in the outlet pipe evaporates until the Φ dry, the water in the process of evaporation, the switch type float valve will automatically close the water outlet with the drop of the water level, so the odors and harmful insects and pests in the outdoor sewage drainage pipe or the throat pipe It can't enter the room through the outlet pipe and the switch float valve, but when it is used again, the water can flow into the drain trap from the indoor inlet pipe, and it can immediately return to the function of normal drainage to the outside. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of an automatic gas barrier device of the present invention;

Fig. 2a to Fig. 2d are respectively perspective views of four stages of drainage, stationary, dry setting and recovery of a specific embodiment of the automatic gas barrier device of the present invention. Fig. 3a to Fig. 3d respectively show the four stages of the drainage, stationary, drying and recovery of another embodiment of the automatic gas barrier device of the present invention. [Component Symbol Description] 1,21 Drain Gas Cylinder -13- 1277684

2 Inlet pipe 3,1 3 Outlet pipe 4, 14 Float valve 5 Pallet 6,16 Exhaust valve 8 Connection structure 11 Air outlet 12, 112 Water outlet 15 Support ring 3 1 Connection part 5 1 Flow hole

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Claims (1)

1277684 * W X. Patent application scope: 1. An automatic gas trap device for preventing backflow of bacteria and toxic gases, characterized in that it comprises: - a drainage air trap having a water inlet at the top thereof An air outlet is provided on the surface, and a water outlet is arranged on the circumferential surface; a water inlet pipe is a straight pipe and communicates with the water inlet port of the drainage air separator, and a water outlet pipe is installed obliquely upward on the wall around the water outlet Φ a float valve, the float valve is movably mounted in the drain trap; and a bracket having a central hole that is mounted through the center hole to the inlet pipe below the float valve and horizontally located Below the location of the nozzle. 2. The automatic gas barrier device according to claim 1, wherein the height of the float valve is larger than the diameter of the water outlet, and when the float valve is moved down to the position opposite to the support member, it is partially closed by the circumferential surface. The entire outlet. 3. The automatic gas trap of claim 1, wherein the exhaust port of the row of water traps is provided with an exhaust valve. 4. The automatic gas barrier device of claim 1, wherein the outlet pipe has an inclination angle of 20 to 80 with respect to a center line of the drainage air trap. . 5. The automatic gas barrier device of claim 4, wherein the outlet pipe has an optimum inclination angle of 45°. 6. The automatic gas barrier device of claim 1, wherein the automatic gas barrier device further comprises a holding tube, the inner wall of the holding tube is provided with internal threads, and the outer wall of the lower portion of the water inlet tube The external thread is provided, so the -15-1277684 pipe can be screwed to the lower part of the inlet pipe to keep the carrier in a certain position. 7. The automatic gas trap of claim 1, wherein the free end of the water pipe has a coating head perpendicular to a centerline of the drain trap. The automatic gas barrier device of claim 1, wherein the tubular portion of the drainage gas barrier below the carrier member can be formed as a detachable mating connection structure with the upper portion thereof, including a thread or a concave and convex portion. And rubber seals. The automatic gas barrier device of claim 1, wherein the holder is a transport plate having a center hole and a flow hole. . 10. The automatic gas barrier device of claim 1, wherein the carrier member is a support ring, and the card is disposed at a position of the pipe under the water outlet. The float valve is completely closed when in this position. Water nozzle. -16-