Dirt removal device for railway vehicle

Abstract

To provide a dirt removal device capable of easily checking the communication state between a sewage storage tank and a sewage inlet of a railway vehicle.SOLUTION: A disclosed dirt removal device includes: a box-shaped sewage inlet with an opening in the top; a lid to cover the opening of the sewage inlet; a tubular dirt removal arm for introducing dirt removed from a sewage storage tank of a railway vehicle into the sewage inlet that is attached to the lid; a suction hose that is attached to the tip of the dirt removal arm and is capable of being connected to a discharge outlet of the sewage storage tank of the railway vehicle; and a valve for checking the water supply attached to the middle of the dirt removal arm outside the sewage inlet. The valve for checking the water supply includes: a shaft body; an opening / closing lid rotatable on the shaft body; and a balance weight rotated together with the opening / closing lid on the shaft body, which is attached to the opening / closing lid. The opening / closing lid is configured to change the position of the balance weight as the flow rate of wastewater in the dirt removal arm increases.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a waste extraction device for extracting waste from a waste tank of a railway vehicle. [Background technology]

[0002] A waste tank installed in a toilet of a railway vehicle is described in Patent Document 1. The waste tank described in Patent Document 1 is provided with an opening and closing cock for discharging waste accumulated in the waste tank.

[0003] FIG. 4 is a schematic diagram showing a schematic configuration of a conventional waste removal device.

[0004] The waste extractor 90 is provided in a railroad depot and is used to extract waste from a waste tank of a railroad car. The waste extractor 90 includes a wastewater manhole 91 buried in the ground, covers 92a and 92b for closing an opening at the top of the wastewater manhole 91, a tubular wastewater extractor arm 93 inserted into an opening provided in the center of the cover 92a and fixed to the cover 92a by a fixing means such as a bolt (not shown), a suction hose 94 connected to the outer end of the wastewater extractor arm 93, and a coupler 95 attached to the tip of the suction hose 94. In the example of FIG. 4, the suction hose 94 is hung from a hook provided in the railroad depot by a chain 96 connected to the coupler 95. An opening 97 leading to a sewer and a partition wall 98 for partitioning the inside of the wastewater manhole 91 are provided inside the wastewater manhole 91.

[0005] The sewage manhole 91 is a trap manhole, and sewage is constantly stored in a trap section 99 separated by a partition wall 98. Sewage introduced into the sewage manhole 91 through the wastewater removal arm 93 is injected into the trap section 99, and sewage overflowing from the trap section 99 flows into the sewer through an opening 97. The lower end of the wastewater removal arm 93 is located below the surface of the sewage stored in the trap section 99, preventing gases such as hydrogen sulfide and ammonia in the sewage manhole 91 from being released through the wastewater removal arm 93.

[0006] When removing waste from the waste tank of the railroad car, the hanging chain 96 is removed from the hook, the coupler 95 is connected to the drain of the waste tank of the railroad car, and the open / close cock is opened. The waste tank is provided with a water inlet for supplying water, and industrial water is poured into the tank using a water supply device connected to the water inlet. The poured industrial water flushes out the waste in the tank and cleans the inside of the tank. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2006-103587 A Summary of the Invention [Problem to be solved by the invention]

[0008] When pouring industrial water into a wastewater tank, it is necessary to ensure that the wastewater tank and wastewater manhole are connected (so that wastewater can flow into the wastewater manhole). If industrial water is poured into a wastewater tank while the valve on the wastewater tank's drain is closed, the wastewater tank will overflow and wastewater will back up from the drain inside the vehicle. The backflowing wastewater will not only contaminate the vehicle, but it may also damage the electrical system underneath the vehicle.

[0009] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a waste removal device that can easily check the communication state between a waste tank and a wastewater manhole of a railway vehicle. [Means for solving the problem]

[0010] The present invention is a sewage extraction device for a railway vehicle, comprising: a box-shaped sewage manhole having an opening on an upper surface; a lid for covering the opening of the sewage manhole; a tubular sewage extraction arm attached to the lid for introducing sewage extracted from a sewage tank of the railway vehicle into the sewage manhole; a suction hose attached to the tip of the sewage extraction arm and connectable to a discharge outlet of the sewage tank of the railway vehicle; and a water supply check valve attached to the middle of the sewage extraction arm outside the sewage manhole, the water supply check valve being attached to a shaft disposed outside the sewage extraction arm and being attached to the shaft so as to be rotatable about the shaft and being connected to the inside of the sewage extraction arm. and a balance weight attached to the opening / closing cover and rotatable integrally with the opening / closing cover around a shaft, wherein the opening / closing cover is located in the first rotation position when the magnitude of the force applied to the opening / closing cover from inside the waste removal arm is equal to or smaller than a first threshold value, and is located in the second rotation position when the magnitude of the force applied to the opening / closing cover from inside the waste removal arm is equal to or larger than a second threshold value that is larger than the first threshold value, and the position of the balance weight changes as the opening / closing cover moves from the first rotation position to the second rotation position. Effect of the Invention

[0011] According to the present invention, a waste removal device can be provided that can easily check the communication state between the waste tank and the wastewater manhole of a railway vehicle. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a schematic diagram showing a schematic configuration of a waste removal device according to an embodiment; [Diagram 2] A close-up of the "X" in Figure 1. [Diagram 3] Schematic cross-sectional view of the "Y" part shown in Figure 2 [Figure 4] FIG. 1 is a schematic diagram showing a general configuration of a conventional waste removal device; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] FIG. 1 is a schematic diagram showing the general configuration of a dirt removal device according to an embodiment, FIG. 2 is an enlarged cross-sectional view of part "X" shown in FIG. 1, and FIG. 3 is a schematic cross-sectional view of part "Y" shown in FIG. 2.

[0014] The waste extractor 100 is installed in a railroad depot and is used to extract waste from a waste tank of a railroad car. The waste extractor 100 includes a wastewater basin 1, a lid 2, a waste extractor arm 3, a suction hose 11, a water supply check valve 4, and a limit switch 5.

[0015] Although not shown in the drawings, the railroad depot is provided with a water supply device having a water injection hose connectable to a water supply port for injecting industrial water provided in the waste tank of the railroad car and connected to an industrial water supply. In this embodiment, the water supply device is provided with an electromagnetic valve that can be electrically opened and closed.

[0016] The sewage manhole 1 is made of concrete and buried underground. An opening is provided on the top surface of the sewage manhole 1. The sewage manhole 1 has a box shape and is provided on the side with an opening 9 that leads to the sewer system. The sewage manhole 1 shown in Fig. 1 does not have a partition wall that constitutes a trap section as shown in Fig. 4.

[0017] The lid 2 is made of metal or concrete, and covers and closes the opening at the top of the sewage manhole 1. The lid 2 is provided with an opening through which the lower end of the waste removal arm 3 can be inserted.

[0018] The waste extraction arm 3 is a pipe-shaped member for introducing waste extracted from a waste tank of a railway vehicle into the wastewater manhole 1. In this embodiment, the lower end of the waste extraction arm 3 is inserted into the wastewater manhole 1.

[0019] A suction hose 11 is attached to the waste extraction arm 3 and has a coupler 12 that can be connected to the outlet of a waste tank of a railway vehicle. In the example of Fig. 1, the suction hose 11 is suspended from a hook provided in a railroad depot by means of a chain 13 connected to the coupler 12.

[0020] The water supply check valve 4 is attached to the waste removal arm 3 outside the wastewater manhole 1. The water supply check valve 4 has a shaft body 6, an opening / closing cover 7, and a balance weight 8.

[0021] The shaft body 6 is disposed so as to extend in a substantially horizontal direction, and is attached to the waste removal arm 3.

[0022] The opening / closing lid 7 is attached to the shaft body 6 so as to be rotatable around the shaft body 6. The opening / closing lid 7 is rotatable between a first rotation position (position shown by a solid line in FIG. 3) in which the inside of the waste removal arm 3 is closed, and a second rotation position (position shown by a dashed line in FIG. 3) in which the inside of the waste removal arm 3 is opened.

[0023] The balance weight 8 is disposed on the opposite side of the shaft 6 to the opening / closing lid 7, and is connected to the opening / closing lid 7. The balance weight 8 is rotatable integrally with the opening / closing lid 7 around the shaft 6. The balance weight 8 changes the rotational position of the opening / closing lid 7 depending on the magnitude of the force applied to the opening / closing lid 7 from inside the waste removal arm 3. The force applied to the opening / closing lid 7 from inside the waste removal arm 3 is a force applied by the wastewater flowing through the waste removal arm 3.

[0024] As shown by the solid line in Figure 3, when no wastewater is flowing into the waste removal arm 3, a clockwise moment acts on the opening / closing lid 7 about the shaft 6 in Figure 3 due to the weight of the balance weight 8. Therefore, the opening / closing lid 7 is pressed against a protrusion inside the waste removal arm 3 at the first rotation position shown by the solid line, closing the inside of the waste removal arm 3.

[0025] The limit switch 5 is attached to the upper side of the water supply check valve 4. The limit switch 5 is electrically connected to a solenoid valve (not shown) of the water supply device, and functions as an electrical switch for opening and closing the solenoid valve. The limit switch 5 has a lever 10 for detecting physical operation. When the opening / closing cover 7 is in the second rotation position (broken line in FIG. 3), the balance weight 8 pushes up the lever, turning the limit switch 5 on and opening the solenoid valve of the water supply device.

[0026] The waste removal operation using the waste remover 100 according to this embodiment is carried out as follows. First, the coupler 12 provided on the suction hose 11 is connected to the discharge outlet of the waste tank of the railway vehicle. Also, the water supply hose of the water supply device is connected to the water supply inlet of the waste tank of the railway vehicle. If the water supply inlet has an opening and closing cock, it is opened. At this stage, the solenoid valve is closed. Next, the opening and closing cock of the discharge outlet is opened to start discharging wastewater from the waste tank.

[0027] When wastewater is poured into the wastewater removal arm 3, a pressing force caused by the falling wastewater is applied to the opening / closing lid 7. When the magnitude of the force applied to the opening / closing lid 7 by the wastewater flowing through the wastewater removal arm 3 exceeds a first threshold value, the opening / closing lid 7 starts to rotate counterclockwise in FIG. 3 around the shaft 6. When the magnitude of the force applied to the opening / closing lid 7 exceeds the first threshold value, the wastewater flows from the wastewater removal arm 3 into the wastewater manhole 1, and the wastewater flows into the sewer through an opening 9 provided on the side of the wastewater manhole 1. When the flow rate of the wastewater flowing through the wastewater removal arm 3 increases, the opening / closing lid 7 further rotates counterclockwise in FIG. 3 around the shaft 6. When the magnitude of the force applied to the opening / closing lid 7 by the wastewater flowing through the wastewater removal arm 3 exceeds a second threshold value that is larger than the first threshold value, the opening / closing lid 7 moves to a second rotation position indicated by a two-dot chain line, and the water supply check valve 4 opens.

[0028] As the opening / closing cover 7 of the water supply check valve 4 moves from the first position to the second position, the opening / closing cover 7 moves the balance weight 8 to the position shown by the dashed line in Fig. 3, pushing up the lever 10 and turning on the limit switch 5. When the limit switch 5 is turned on, the solenoid valve of the water supply device opens, starting the supply of industrial water to the waste tank and accelerating the discharge of waste from the waste tank.

[0029] After that, the water supply from the water supply device is manually stopped. When the injection of industrial water into the waste tank is stopped, the flow of wastewater into the waste removal arm 3 stops. When the magnitude of the force applied to the opening / closing lid 7 by the wastewater flowing through the waste removal arm 3 becomes equal to or less than the first threshold value, the opening / closing lid 7 returns to the first rotation position due to the weight of the balance weight 8, and the inside of the waste removal arm 3 is closed. When the opening / closing lid 7 returns to the first rotation position, the limit switch 5 is also turned off.

[0030] As described above, the waste extractor 100 according to this embodiment is provided with a water supply check valve 4 having a balance weight 8 on the waste extractor arm 3 for introducing wastewater into the wastewater manhole 1. The open / close lid 7 of the water supply check valve 4 moves from the first rotation position to the second rotation position as the flow rate of wastewater flowing through the wastewater extractor arm 3 increases, changing the position of the balance weight 8. In this embodiment, when the open / close lid 7 is in the second rotation position, the balance weight 8 turns on the limit switch 5 to automatically start water supply from the water supply device. According to this configuration, the water supply check valve 4 can be used to check the communication state from the wastewater tank to the wastewater manhole 1, and the supply of industrial water can be started in a state where the wastewater tank and the wastewater manhole 1 are reliably connected. Therefore, water supply can be prevented when the wastewater tank and the wastewater manhole 1 are not connected, and the possibility of vehicle contamination and electrical system failure due to backflow of wastewater can be prevented.

[0031] In addition, since it is essential to prevent the backflow of toxic and odorous gases in the sewage manhole 1, a sewage manhole (trap manhole) like the one shown in Figure 4 has traditionally been used for the sewage drainage device. It is necessary to bury multiple sewage drainage devices according to the size of the train configuration, but the sewage manhole with the structure shown in Figure 4 is large because it has a trap section, so a lot of space is required for the installation of the sewage manhole, and the cost of installation is also high.

[0032] In the waste removal device 100 according to this embodiment, the openable / closable lid 7 opens when the flow rate of wastewater flowing through the wastewater removal arm 3 exceeds a certain level, and closes the wastewater removal arm 3 when the flow rate of wastewater flowing through the wastewater removal arm 3 decreases and the magnitude of the force applied from the wastewater to the openable / closable lid 7 falls below a first threshold value. In other words, when removing wastewater from a wastewater tank, the water supply check valve 4 can be easily opened to allow wastewater to flow into the wastewater manhole 1, and when not in use, the water supply check valve 4 can automatically close the lower end of the wastewater removal arm 3. When the water supply check valve 4 is in the first rotation position, the wastewater removal arm 3 is closed to prevent backflow of gas from the wastewater manhole 1, so that a trap section (storage section) is not required as in the conventional trap manhole shown in FIG. 4, and the wastewater manhole 1 can be made smaller in size.

[0033] A vehicle depot is provided with a plurality of wastewater extraction devices corresponding to a plurality of wastewater tanks provided in one train. The wastewater extraction device 100 according to this embodiment allows the wastewater manhole 1 to be made smaller, so that it is possible to reduce the space and installation costs required for burying the wastewater manhole 1 while preventing backflow of gas from the wastewater manhole 1.

[0034] In the above embodiment, a configuration has been described in which the solenoid valve of the water supply device can be automatically turned on using the limit switch 5, but it is also possible to employ the following modified examples.

[0035] (Variation example 1) The limit switch 5 and the solenoid valve of the water supply device may be omitted. Even in this case, the opening and closing lid 7 changes the position of the balance weight 8 as wastewater flows into the waste removal arm 3, making it possible to visually grasp the state of communication between the waste tank and the wastewater manhole 1. The worker need only start supplying water after confirming that the balance weight 8 is in the second position, thereby reducing the possibility of water being supplied when the waste tank and the wastewater manhole 1 are not in communication.

[0036] (Variation 2) The solenoid valve of the water supply device may be omitted, and an alarm device electrically connected to the limit switch 5 may be provided. The alarm device is a device for notifying that the water supply check valve 4 has been opened, and may be, for example, a device capable of outputting sound, light, images, vibrations, etc. With this configuration, the worker can easily grasp the communication state between the wastewater tank and the wastewater manhole 1, and the possibility of water being supplied when the wastewater tank and the wastewater manhole 1 are not connected can be reduced.

[0037] As described above, according to the present invention, a waste extractor 100 can be realized that utilizes the water supply check valve 4 to easily check the state of communication between the waste tank and the wastewater basin of a railway vehicle.

[0038] Furthermore, the above-mentioned first threshold value and second threshold value can be set appropriately based on the respective masses of the opening / closing cover 7 and balance weight 8, the arm lengths from the respective shaft bodies 6 (centers of rotation) of the opening / closing cover 7 and balance weight 8, and the design values ​​of the sewage flow rate required to open the opening / closing cover 7.

[0039] Furthermore, the present invention can be applied not only to a sewage extraction device for extracting sewage from the sewage tank of a railway vehicle, but also to a sewage extraction device for extracting sewage from the sewage tank of a vehicle other than a railway vehicle or an aircraft, or from the sewage tank of a portable toilet loaded onto a truck, etc. [Industrial Applicability]

[0040] INDUSTRIAL APPLICABILITY The present invention can be used in a waste extraction device for extracting waste from a waste tank, and is particularly suitable for use as a waste extraction device for railway cars installed in a railroad depot. [Explanation of symbols]

[0041] 1. Sewage manhole 2 lid 3 Waste removal arm 4. Water supply check valve 5 Limit Switches 6-axis body 7 Opening and closing lid 8 Balance weight

Claims

1. A waste extraction device for a railway vehicle, comprising: A box-shaped sewage basin having an opening on an upper surface; A cover for covering the opening of the wastewater tank; a tubular waste extraction arm attached to the lid for introducing waste extracted from the rail car waste tank into the sump; a suction hose attached to a tip of the waste extraction arm and connectable to a discharge outlet of the waste tank of the railcar; a water supply confirmation valve attached to the middle of the waste removal arm outside the wastewater basin; The water supply confirmation valve is A shaft body disposed outside the dirt removal arm; an opening / closing cover attached to the shaft body so as to be rotatable about the shaft body, the opening / closing cover being rotatable between a first rotation position in which the interior of the waste removal arm is closed and a second rotation position in which the interior of the waste removal arm is opened; a balance weight attached to the opening / closing cover and rotatable integrally with the opening / closing cover around the shaft; A waste removal device in which the opening / closing lid is positioned at the first rotation position when the magnitude of the force applied to the opening / closing lid from inside the waste removal arm is equal to or less than a first threshold, and is positioned at the second rotation position when the magnitude of the force applied to the opening / closing lid from inside the waste removal arm is equal to or greater than a second threshold that is greater than the first threshold, and the position of the balance weight is changed as the lid moves from the first rotation position to the second rotation position.

2. A limit switch is provided to be attached to the upper side of the water supply check valve, 2. The waste removal device according to claim 1, wherein the balance weight turns on the limit switch when the opening / closing cover is in the second rotation position.

3. a water supply device that is connected to an industrial water supply and has a water injection hose that can be connected to a water supply port of the waste tank of the railway vehicle and an electromagnetic valve that is electrically connected to the limit switch, and is capable of injecting cleaning water into the waste tank through the water injection hose; 3. The waste removal device according to claim 2, wherein the limit switch is turned on to open the solenoid valve.

4. 3. The waste removal device according to claim 2, further comprising an alarm device electrically connected to the limit switch for notifying that the water supply check valve has been opened when the limit switch is turned on.

5. 5. The wastewater extraction device according to claim 1, wherein the wastewater basin does not have a storage section for storing a predetermined amount of wastewater.

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