JP2020192848A - Water sealing device for high-speed vehicle - Google Patents

Abstract

To provide a water sealing device which can follow large atmospheric pressure variations between an inside and outside of a high-speed vehicle in a small and light-weight structure.SOLUTION: A water sealing device comprises an inflow pipe 40 through which fouled water flows into a water storage tank 30, a discharge pipe 70 through which the fouled water is discharged from the water storage tank 30, and a water sealing valve 60 which communicates with the inflow pipe and opens toward an inside of the water storage tank. The water sealing valve 60 has a floating valve body 66 which is arranged so as to be vertically movable in a valve chamber and of which specific gravity is less than 1. The discharge pipe 70 consists of a siphon type discharge pipe 70 which exists in the water storage tank 30 and opens toward an outside. This siphon type discharge pipe 70 has a downstream side bent part 78 for stopping discharge of the fouled water while leaving the fouled water in the water storage tank 30 so as to water-seal an upstream side suction port 76U, and the siphon type discharge pipe 70 is blocked from outside atmospheric pressure by the fouled water left in the water storage tank 30 to discharge the fouled water while maintaining the siphon action.SELECTED DRAWING: Figure 1

Description

The present invention relates to a water sealing device for a high-speed vehicle used for treating wastewater generated in the interior of a high-speed vehicle, and more particularly to a water sealing device for a high-speed vehicle so that the device does not become large due to high speed of the vehicle. ..

When sewage (or wastewater) used inside a high-speed vehicle that requires a water-sealing function is discharged to the outside of the vehicle, the water-sealing function at the outlet of the wastewater treatment discharge pipe must be maintained.

When the vehicle travels at high speed, a large pressure difference occurs between the inside and outside of the vehicle, and it is necessary to maintain airtightness while following the fluctuation of the air pressure between the inside and outside of the vehicle, but it is necessary to discharge wastewater from the inside of the vehicle to the outside of the vehicle. Needs a water sealing device capable of maintaining a head corresponding to the pressure difference.

Over the conventional technique, the inflow side water storage chamber having an inflow pipe and the outflow side water storage chamber having an outlet pipe are connected by a siphon pipe, and both water storage chambers between the upper end of the outlet pipe and the upper end of the siphon pipe are connected. A water sealing device (see Patent Document 1) that makes the volume of the pipe larger than the volume of the siphon pipe, or an inflow pipe and an outlet pipe in the water storage tank, and the inflow pipe is the upper part of the valve chamber having openings at the top and bottom. There is a water sealing device (see Patent Document 2) that is connected to the opening and the upper opening of the outlet pipe is located higher than the upper opening of the valve chamber.

Since this type of water sealing device is mounted under the floor of the vehicle, there is a limit to the height of the device, but in recent years, high-speed vehicles have increased in speed to 300 km / h or more, and the height of the head increases as the vehicle speed increases. In order to avoid this and reduce the size, if the conventional water storage system is a multiple system such as a double system or a triple system, the internal structure becomes extremely complicated and is necessary for the device. The amount of water stored also increases, the overall weight increases, and there arises a problem that the specification conditions for speeding up the vehicle cannot be satisfied.

Special Publication No. 54-11453 Jikkenhei 5-69470 Gazette

The problem to be solved by the present invention is to ensure high reliability against high atmospheric pressure fluctuations even if the height of the head is reduced so that the constraint of the vehicle's underfloor mounting limit size can be adapted. An object of the present invention is to provide a small and lightweight water sealing device for a high-speed vehicle capable of maintaining a water sealing function.

In order to solve the above-mentioned problems, the present invention includes a water tank, an inflow pipe provided at an upper part of the water tank to flow in sewage, a discharge pipe to discharge the sewage from the water tank, and the like. A water sealing valve having an upper opening communicating with the inflow pipe and a lower opening opening in the water storage tank is provided, and the water sealing valve has a specific gravity arranged so as to move up and down between the valve chamber and the valve chamber. The discharge pipe is composed of a siphon type discharge pipe that is inside the water tank and opens to the outside, and the siphon type discharge pipe is an upstream suction port thereof. Has a downstream bent portion for stopping the discharge of sewage by leaving sewage in the water tank so as to seal the water, and shuts off the siphon type discharge pipe from the external pressure by the sewage remaining in the water tank. It is an object of the present invention to provide a water sealing device for a high-speed vehicle, which is characterized in that sewage is discharged while maintaining a siphon function.

Covered by the problem-solving means of the present invention, the bent portion of the siphon type discharge pipe can be L-shaped, and this L-shaped bent portion can store sewage in the lower part of the water storage tank to make the inside of the pipe external. It can be blocked and the siphon action can be effectively generated. In addition, the outlet of the siphon type discharge pipe has a reliable and reliable head function that can close the external air pressure fluctuation and maintain the air pressure inside the vehicle when there is no sewage in the water tank and the head cannot be formed. There is.

It is preferable to cover the problem-solving means of the present invention with a protrusion on the inner wall of the valve chamber to change the water flow of wastewater to change the water flow of sewage.

According to the present invention, when a water sealing valve including a movable floating valve body is provided at the outlet of the inflow pipe and the movable floating valve body is in a floating state in the valve chamber, a water sealing action by the head occurs, but the vehicle When the pressure difference between the inside and outside is large, the floating valve shuts off the flow path, so it can maintain the water-sealed state, and because it has a siphon type discharge pipe, it can change the air pressure inside and outside the vehicle even with a low head. It is possible to follow the water, and it is possible to maintain the water sealing action of a small, lightweight and high-speed traveling vehicle without increasing the size of the entire device.

According to one embodiment of the present invention, it is a front sectional view of a water sealing device for a high-speed vehicle in which a floating valve body of a water sealing valve closes an upper opening. It is the same device as the device of FIG. 1, but is a front sectional view of a water sealing device for a high-speed vehicle in which the floating valve body of the water sealing valve closes the lower opening. It is the same device as the device of FIG. 1, but is a front sectional view of a water sealing device for a high-speed vehicle in which the floating valve body of the water sealing valve is in a floating state away from the upper and lower openings. It is a left measurement sectional view of the water sealing device for a high-speed vehicle of FIG. It is a right measurement sectional view of the water sealing device for a high-speed vehicle of FIG. It is a partial schematic sectional view of the modification of the water seal valve used for the water seal device for a high-speed vehicle of FIG.

A water sealing device 10 for a high-speed vehicle according to a preferred embodiment of the present invention is shown in FIGS. 1 to 3, and the water sealing device 10 is arranged in a water tank cover 20 and a water tank cover 20 as appropriate means. It is derived from the one-tank type water tank 30 fixed by the above, the inflow pipe 40 provided in the upper part of the water tank 30, and the bottom wall 22 of the water tank cover 20 provided in the bottom wall 32L of the water tank 30. It is provided with an outlet pipe 50.

The water sealing device 10 is a siphon type having an upper opening 62U communicating with the inflow pipe 40, a water sealing valve 60 having a lower opening 62L opening in the water tank 30, and a siphon type in the water tank 30 connected to the outlet pipe 50. It further includes a discharge pipe 70.

As can be seen from FIGS. 1 to 3 and 4 and 5, the water tank 30 is formed to be smaller in the depth direction than in the width direction, and the inflow pipe 40 airtightly closes the upper wall 32U of the water tank 30. It is attached through and penetrates the upper wall 22U of the water tank cover 20, the outlet pipe 50 is arranged so as to extend horizontally in the water tank cover 20, and its upstream vertical end 52U is the bottom of the water tank 30. It is liquidtightly attached to the wall 32L and is liquidtightly connected to the outlet 72 which is the downstream end of the siphon type discharge pipe 70, and the downstream vertical end 52L penetrates the bottom wall 22L of the water tank cover 20 and is outside air. It is open to the public.

The water seal valve 60 is arranged above the water tank 30, the upper opening 62U penetrates the upper wall 32U of the water tank 30 in a liquid-tight manner, and the lower opening 62L is spaced from the bottom wall 32L of the water tank 30. It is located in the water tank 30 with a gap.

The water sealing valve 60 is composed of a valve chamber 64 and a floating valve body 66 having a specific gravity of less than 1 which is arranged in the valve chamber 64 and can move up and down. More specifically with reference to FIG. 4, the water sealing valve 60 has an intermediate tubular portion 60C forming the valve chamber 64 and upper and lower openings 62U and 62L, and the floating valve body 66 is seated on the upper and lower parts. It consists of upper and lower tubular parts 60U and 60L with taper 62UT and 62LT including valve seats 68U and 68L that close the openings 62U and 62L, and has a tapered upper and lower tubular shape at the upper and lower ends of the intermediate tubular part 60C. The large-diameter ends of the portions 60U and 60L are fitted while maintaining liquidtightness, the small-diameter portion of the upper tubular portion 60U is fitted to the inflow pipe 40 while maintaining liquidtightness, and the small-diameter portion of the lower tubular portion 60L is fitted. The end (exit) is desired in the water storage chamber 34 of the water tank 30. Also. In the water sealing valve 60, the upper shoulder portion 60S of the taper 62LT of the lower tubular portion 60L is seated on the valve receiver 36 provided on the inner wall of the water storage tank 30 and is received by the water storage tank 30. As shown in FIG. 6, the upper and lower tubular portions 60U and 60L may be stepped instead of tapered. In this case, the valve seat is the shoulder of the step.

Referencing FIG. 4 again, the inner surface of the intermediate tubular portion 60C has a plurality of protrusions 60P. In the illustrated example, these protrusions 60P have three protrusions 60PA provided at substantially equal intervals in the radial direction and these protrusions 60PA are displaced in the vertical direction and are located in the radial direction. Includes two protrusions 60PB. These protrusions 60P have a function of randomizing the flow of drainage passing through the water seal valve 60 and preventing sludge from sewage from adhering to the inside of the water seal valve 60.

As shown in FIGS. 1 to 3 and 5, the siphon type discharge pipe 70 is composed of an inverted U-shaped pipe body 74, and its upstream end (suction port) 76U is the bottom wall of the water storage tank 30. It opens at intervals from 32L and has an L-shaped bent portion 78 near the downstream end portion 76L.

The outlet pipe 50 is provided with a check valve 54 in a horizontal portion thereof. The check valve 54 is provided to prevent the water seal valve 60 from being able to follow the atmospheric pressure fluctuation from the outside when there is no sewage in the water storage tank 30 and the water head cannot be formed. In order to block the external air pressure fluctuation, the outlet pipe 50 is closed and the air pressure of the siphon type discharge pipe 70 rises when the external air pressure is higher than the airtight chamber in the vehicle connected to the inflow pipe 40. It is preventing.

The water sealing device 10 includes a water refill pipe 80 that liquidally penetrates the bottom wall 22L of the water tank cover 20 and the bottom wall 32L of the water tank 30 to replenish water in the water tank 30 (see FIG. 5). The water replenishment pipe 80 has a function of replenishing water into the water storage tank 30 from the lower end inlet in order to maintain the water sealing function in the siphon type discharge pipe 70 in the water storage tank 30 at the initial stage when there is no water storage in the water storage tank 30.

Next, the operation of the water sealing device 10 of the present invention will be described. When the inside of the water storage chamber 30 of the water storage tank 30 is filled with sewage from a wash basin or the like, the floating valve body 66 of the water sealing valve 60 is filled with water. The upper opening 62U of the sealing valve 60 is closed to maintain the airtightness inside the vehicle (airtight chamber). In this state, as shown in FIG. 1, in the siphon type discharge pipe 70, the water storage reaches the siphon action generation line L1, so that the discharge pipe 70 generates the siphon action and is stored in the water storage tank 30. The sewage is vigorously discharged to the outside through the outlet pipe 50 having the check valve 54.

In this way, the sewage is discharged, the water level in the water storage tank 30 reaches the bent portion 78 of the siphon type discharge pipe 70, and as shown in L2 of FIG. 3, the upstream opening (suction port) of the siphon type discharge pipe 70. When the amount of sewage drops until it remains in 75L, the discharge of sewage stops, and the pressure is the same as the outside air pressure in the discharge pipe 70 and is balanced with the pressure in the water tank 30, and this sewage has a water replenishing effect to seal the water. Maintained. As described above, the siphon type discharge pipe 70 has the L-shaped bent portion 78 on the downstream end side in order to stop the discharge of sewage at the water level L2. The bent portion 78 may have an S-shape, a U-shape, or any other shape including a horizontal portion as long as the discharge of sewage can be stopped.

When sewage is generated in the vehicle (airtight chamber) again, the sewage flows into the inflow pipe 40 from the upper opening 62U of the water seal valve 60, and therefore, a floating valve blocking the upper opening 62U of the water seal valve 60. Since the body 66 is pushed down to open the upper opening 62U, the sewage freely passes through the valve chamber 64 (see FIG. 3). In this case, the water head is held in a state where the pressure inside the vehicle and the pressure outside the vehicle are balanced at the same level, and the water sealing function is maintained. In FIG. 3, the water level L3 indicates the airtightness-maintaining water level in the vehicle, and the water level L4 indicates the water level during the inflow of sewage.

When the external air pressure is lower than the internal air pressure, the gas inside the vehicle flows into the valve chamber 64 from the upper opening 62U of the water sealing valve 60 via the inflow pipe 40 and floats on the water surface in the valve chamber 64 and on the water surface. The floating valve body 66 is pushed down toward the lower opening 62L. When this state continues, all the sewage in the valve chamber 64 is stored in the water storage chamber of the water tank 30, the valve chamber 64 is filled with gas, and at the same time, the lower opening 62L of the water sealing valve 60 is a floating valve. Obstructed by body 66 (see FIG. 2).

Therefore, the further outflow of gas from the inside of the vehicle (airtight chamber) is surely blocked by the blockage of the lower opening 62L of the water sealing valve 60, so that the water sealing state of the water sealing device 10 is not broken. The water sealing function can be maintained safely.

In this state, the sewage in the water sealing valve 60 descends, and the sewage corresponding to the internal volume of the valve chamber 64 is pushed out of the valve chamber 64, flows into the water storage tank 30, and enters the water storage tank 30. It is stored in.

When the external air pressure of the water storage tank 30 becomes higher than the air pressure inside the vehicle (airtight chamber), the check valve 54 of the outlet pipe 50 connected to the downstream end 76L of the siphon type discharge pipe 70 closes, so that water due to the high external air pressure. The sealed state will not be broken. Therefore, even if the floating valve body 66 does not move so as to close the upper opening 62U of the water sealing valve 60, it is possible to prevent the sewage in the water storage tank 30 from being blown up into the vehicle.

When the water level of the sewage in the water storage tank 30 reaches L1 again, a siphon action occurs, and the water is discharged until the water level L2 (see FIGS. 3 and 5) corresponding to the portion having the bent portion 78 is reached.

In this way, the water sealing device 10 is provided in the valve chamber 64 of the water sealing valve 60 by the floating valve body 66 that is inside the valve chamber 64 of the water sealing valve 60 and moves in the valve chamber by utilizing buoyancy and gravity. Since the upper and lower openings can be closed, the outflow of drainage from the inside of the vehicle (airtight chamber) is free, but the outflow of gas from the inside of the vehicle (airtight chamber) should be blocked to ensure the water sealing function is maintained. Can be done.

Further, the discharge pipe 70 is a siphon type having a bent portion 78 on the downstream end side, so that the sewage level in the water storage tank 30 remains in the upstream opening 76U which is the suction port of the discharge pipe 70. Since the discharge is stopped, the water replenishment action by sewage is effectively maintained and the siphon action is not impaired.

According to the water sealing device of the present invention, it has the following effects.
(1) When a water sealing valve 60 having a movable floating valve body 66 is connected to an outlet at the downstream end of the inflow pipe 40 and the floating valve body 66 is in a floating state in the valve chamber 64, the water sealing action by the water head is performed. When the pressure difference between the inside and outside is large, the floating valve body 66 can block the flow path and effectively maintain the water sealing function.
(2) The discharge pipe 70 is a siphon type so that the sewage can flow in by blocking the pressure difference between the inside and outside even while the sewage flows into the water tank, even if the vehicle speeds up and the pressure difference between the inside and outside becomes large. It can be made into a small and lightweight structure without raising the water head. Therefore, it can be effectively installed under the floor of a high-speed vehicle.

According to the present invention, it is possible to reduce the size and weight of the water sealing device by blocking a large difference in water pressure between the inside and outside even with a low head, and it is industrially effective as a water sealing device used for wastewater treatment of high-speed vehicles. It can be used.

10 Water sealing device 20 Water tank cover 22U Upper wall 22L Bottom wall 30 Water storage tank 32U Upper wall 32L Bottom wall 34 Water storage room 36 Valve receiver 40 Inflow pipe 50 Outlet pipe 52U Upstream vertical end 52L Downstream vertical end 54 Check valve 60 Water Sealing valve 60C Intermediate tubular part 60U, 60L Tapered tubular part 60UT, 60LT Tapered 60P, 60PA, 60PB Protrusion 62U Upper opening 62L Lower opening 64 Valve chamber 66 Floating valve body 68U, 68L Valve seat
70 Siphon type discharge pipe 72 Outlet 74 Pipe body 76U Upstream side end (suction port)
76L Downstream end 78 L-shaped bend
80 water pipe

Claims (4)

A water tank, an inflow pipe provided in the upper part of the water tank to flow in sewage, a discharge pipe to discharge sewage from the water tank, an upper opening communicating with the inflow pipe, and an opening in the water tank. The water sealing valve includes a water sealing valve having a lower opening, and the water sealing valve is composed of a valve chamber and a floating valve body having a specific gravity of less than 1 arranged so as to be movable up and down in the valve chamber. The discharge pipe is composed of a siphon type discharge pipe that is inside the water tank and opens to the outside, and the siphon type discharge pipe leaves sewage in the water tank so as to seal the water suction port on the upstream side thereof. It has a downstream bend for stopping the discharge of sewage, and the sewage remaining in the water tank shuts off the siphon type discharge pipe from the external pressure so that the sewage is discharged while maintaining the siphon action. A water sealing device for high-speed vehicles. The water sealing device for a high-speed vehicle according to claim 1, wherein the downstream bent portion of the siphon type discharge pipe is L-shaped. The water sealing device for a high-speed vehicle according to claim 1 or 2, wherein the water sealing device for a high-speed vehicle has a check valve on the outlet side of the siphon type discharge pipe. The water sealing device for a high-speed vehicle according to any one of claims 1 to 3, wherein the water sealing device for a high-speed vehicle has a protrusion on the inner wall of the valve chamber of the water sealing valve to change the flow of sewage.

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