JP2009144339A - Float valve of suction vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To wash a float valve of a suction vehicle securely by a simple method. <P>SOLUTION: A cylindrical part 60 is arranged on an upper face of a receiver tank 6 of a night soil truck equipped with a vacuum hose (the suction vehicle) to form a ceiling opening part 61. This float valve 7 mounted in the cylindrical part 60 is provided with a valve body 65 covering the ceiling opening part 61 and having a valve seat 64 in its inside, a shaft member 67 having a valve element 67b covering the valve seat 64 on an upper side and being vertically movable, and a float ball 69 pressing a lower end of the shaft member 67 to block the valve seat 64 by the valve element 67b when the receiver tank 6 is full of night soil. The valve body 65 is constituted to mount or dismount on/from the cylindrical part 60. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a float valve for a suction wheel that is mounted on a cylindrical portion that is disposed on an upper surface of a receiver tank of a suction wheel and forms a ceiling opening.

  Conventionally, a full automatic stop device (float valve) is provided in a cylindrical portion that forms a ceiling opening on the upper surface of a receiver tank of a suction vehicle. (For example, refer to Patent Documents 1 and 2). This float valve has a valve body that covers the ceiling opening and has a valve seat inside, a shaft member that covers the valve seat on the upper side, a vertically movable shaft member, and a shaft when the receiver tank is full. And a float ball that presses the lower end of the member and closes the valve seat with the valve body. This float valve prevents bubbles and the like from being sucked into the vacuum pump.

  In the above-mentioned float valve, even if the receiver tank is full, the float ball does not float normally due to foreign matter, or the valve body does not completely block the intake port due to foreign matter biting, etc. There was a problem of flowing into the pump.

  In such a case, it was necessary to enter the receiver tank through a manhole provided in the receiver tank and clean the float valve from the inside.

In order to prevent such a complicated operation, a cleaning apparatus as in Patent Document 3 is known. This cleaning device includes a nozzle in the cylindrical portion, and removes foreign matter adhering to the float ball by spraying cleaning water from the nozzle toward the float ball.
Japanese Utility Model Publication No. 61-14770 (particularly FIG. 1) Japanese Utility Model Publication No. 4-4068 Japanese Utility Model Publication No. 60-181485

  However, even in the cleaning device disclosed in Patent Document 3, if the foreign matter on the float ball cannot be removed sufficiently, or if the valve body does not completely block the intake port due to foreign matter biting or the like, It was necessary to wash the float valve from the receiver tank as usual because the washing water was not applied and the foreign matter could not be removed.

  The present invention has been made in view of the above points, and an object of the present invention is to ensure that the float valve of the suction wheel can be cleaned with a simple method.

  In order to achieve the above object, in the present invention, the float valve of the suction wheel is configured to be detachable from the tubular portion of the receiver tank.

  Specifically, the first invention is directed to a suction valve of a suction wheel that is disposed on the upper surface of a receiver tank of the suction wheel and is attached to a cylindrical portion that forms a ceiling opening.

And the float valve
A valve body that covers the ceiling opening and has a valve seat inside;
A shaft member that covers the valve seat on the upper side and is movable up and down;
A float ball that presses the lower end of the shaft member when the receiver tank is full and closes the valve seat with the valve body;
The said valve main body is comprised so that attachment or detachment with respect to the said cylindrical part is possible.

  According to the above configuration, even if foreign matter adheres to the float valve of the suction wheel, the valve body ensures the valve seat when the receiver tank is full by removing and cleaning the valve body from the tubular part of the receiver tank. It will be closed. Further, since the valve body itself can be attached and detached, it is not necessary to enter the receiver tank from the manhole and clean it as before, and the cleaning work is extremely easy.

In the second invention, in the first invention,
One end of a hinge portion is connected to the outer periphery of the upper end of the cylindrical portion, and the lower end portion of the valve body is connected to the other end of the hinge portion.

  According to said structure, connection with the lower end part of a valve main body and the upper end of a cylindrical part is easily cancelled | released by opening a valve main body centering on a hinge part. Conversely, when attaching the valve body, it is only necessary to rotate the valve body around the hinge and place the lower end on the upper end of the cylindrical part. Can be done.

In the third invention, in the first or second invention,
A guide member that accommodates the float ball so as to float,
The guide member is configured to be removable from the cylindrical member after the valve body is removed.

  According to the above configuration, the guide ball can be removed for cleaning and inspection without dropping the float ball into the receiver tank.

In a fourth invention, in any one of the first to third inventions,
An inspection opening is formed at the upper end of the valve body, and the inspection opening is closed by an open / close lid.

  According to the above configuration, the float valve of the suction wheel can be inspected by opening the inspection opening using the opening / closing lid and looking into the valve body without removing the entire valve body.

  As described above, according to the present invention, since the valve body of the float valve of the suction wheel can be freely attached to and detached from the cylindrical portion on the upper surface of the receiver tank, the float valve of the suction wheel can be cleaned extremely easily and reliably. It can be performed.

  According to the second aspect of the present invention, the connection between the valve main body and the cylindrical portion is easily released by connecting the upper end outer periphery of the cylindrical portion and the valve main body lower end portion by the hinge portion, and the float valve of the suction wheel Cleaning and inspection work can be performed very easily.

  According to the third invention, since the guide member that accommodates the float ball so as to be floatable is removable from the cylindrical member, the float ball can be removed together with the guide member, and cleaning and inspection can be performed very easily.

  According to the fourth aspect of the invention, since the inspection opening is formed at the upper end of the valve body, the float valve of the suction wheel can be inspected very easily.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 3 show a vacuum car 1 according to an embodiment of the present invention, and this vacuum car 1 includes a track body 2 that can run on its own. The truck body 2 includes an engine (not shown), and the engine is provided with a power transmission device 3 (shown only in FIG. 5). The power from the power transmission device 3 is transmitted to the vacuum pump 4 and the water pump 5 (shown in FIGS. 5 and 6). The water pump 5 may be driven by a motor directly connected to a battery (not shown) mounted on the truck body 2.

  On the truck body 2, a long receiver tank 6 is mounted on the front and rear of an ellipse whose long axis extends in the vehicle width direction when viewed from the front. In the present embodiment, the receiver tank 6 is a fixed type, but it may be capable of dumping. The vacuum pump 4 is connected to the receiver tank 6.

  Specifically, as shown in FIG. 4, a float valve 7 is provided above the receiver tank 6, and a connection air pipe 9 is connected to the four-way valve 10 via the float valve 7. A safety valve 8 is connected in the middle of the connection air pipe 9 to prevent over-pressurization of the receiver tank 6. One port of the four-way valve 10 is connected to the drain separator 12, and further connected to the suction ports 4 a of the two vacuum pumps 4 through the check valve 13. The discharge port 4 b of the vacuum pump 4 is connected to the oil separator 15 via the sub oil separator 14 and is connected to one port of the four-way valve 10. The remaining one port of the four-way valve 10 is connected to the deodorizing device 16. The oil recovered by the sub oil separator 14 and the oil separator 15 is returned to the vacuum pump 4 via the oil strainer 17.

  A suction hose 21 is connected via a suction valve 20 provided on the back surface of the receiver tank 6. Since the suction hose 21 is usually 40 m to 60 m long, the suction hose 21 is wound around a columnar suction hose reel 22 for a suction hose installed on the upper surface of the receiver tank 6. Then, the vacuum pump 4 is driven using the power of the engine, and the atmospheric pressure in the receiver tank 6 is lowered so that urine, sewage and the like can be sucked from the suction hose 21. Since the receiver tank 6 is elliptical when viewed from the front, even if the hose reel 22 for suction hose is provided, it is within the height restriction.

  A discharge hose (not shown) can be connected to the discharge valve 23 provided at the lower rear end of the receiver tank 6. Although a pair of the discharge valves 23 are provided, only one may be provided.

  As shown in FIG. 5, the gear pump 25 is driven by the power transmitted to the power transmission device 3, and the high-pressure oil is supplied to the hydraulic motor 27 via the electromagnetic pilot switching valve 26. Is to be driven. The hydraulic oil is returned to the oil tank 29 via the return filter 28.

  And the vacuum car 1 is equipped with the washing | cleaning apparatus 40 for discharge | releasing the pressurized washing water. The cleaning device 40 includes, for example, a pair of water tanks 41 on the upper surface of the receiver tank 6. Since the water tank 41 is equally disposed in the left and right spaces on the receiver tank 6 that is elliptical when viewed from the front, the overall height of the vehicle does not increase and the mass balance is good. As shown in FIG. 6, the water tank 41 is connected to the water pump 5 via a water supply hose 42. The pressure of the water pump 5 is configured to be adjustable by a pressure regulating valve 43 provided on the discharge side of the water pump 5. A connecting water hose 44 extending from the pressure regulating valve 43 is connected to a cleaning hose reel 46 through a swivel joint 45 and pressurized from a water discharge gun 48 at the tip of the cleaning hose 47 wound around the cleaning hose reel 46. Wash water is discharged. The cleaning hose reel 46 is provided, for example, below the rear end of the track body 2. A water supply opening / closing valve 49 is provided between the swivel joint 45 and the pressure adjustment valve 43.

  Further, the return side of the pressure regulating valve 43 is connected to the water tank 41. A Y-type strainer 50 is provided on the water absorption side of the water pump 5. A drain cock 51 is connected to the Y-type strainer 50, and the waste collected in the Y-type strainer 50 is discharged by opening the drain cock 51. A drain cock 51 is also connected to each water tank 41, and the water in each water tank 41 is discharged by opening the drain cock 51. A water supply valve 52 is connected to the water tank 41 so that pressurized tap water can be supplied from a water supply hose 57. In addition, water supply valves 53, 54, and 55 are provided to enable water supply from the water storage tank 56. By closing the water supply opening / closing valve 49 and supplying water to the return side of the pressure adjustment valve 43, water can be supplied to the water tank 41 using the water pump 5.

  Next, the configuration of the float valve 7 of the present embodiment will be described in detail with reference to FIGS. Note that the cross-sectional position of the cross section of FIG. 8 is appropriately shifted for easy understanding.

  A cylindrical portion 60 is provided on the upper surface on the front side of the receiver tank 6, whereby a ceiling opening 61 is opened in the receiver tank 6. An inspection manhole 59 is provided on the rear side of the receiver tank 6. The cylindrical portion 60 is welded in a state in which most of the round pipe enters the opening of the receiver tank 6, and an upper end flange 60b is formed at the upper end 60a. One end of a hinge portion 62 is connected to the outer periphery below the upper end flange 60b. In addition, four fixing members 63 are welded to the outer periphery of the upper end 60a at equal intervals. The fixing member 63 is provided with a fixing screw 63b that is rotatable about the pin 63a.

  A lower end 71 of the valve body 65 is connected to the other end of the hinge 62 by a connecting member 62a. Thus, the valve main body 65 can be rotated around the hinge shaft 62 b of the hinge portion 62. A protruding portion 71a protrudes at a portion corresponding to the fixing member 63 in the lower end portion 71, and a notch 71b that can be inserted by rotating the fixing screw 63b is formed in the protruding portion 71a. The lower end portion 71 of the valve body 65 is placed on the upper end flange 60b of the upper end 60a of the cylindrical portion 60, and the fixing screw 63b is inserted into the notch 71b of the protruding portion 71a. The valve main body 65 is detachably attached to the cylindrical portion 60 by fastening the packing 73 provided on the pipe while deforming it.

  The valve main body 65 is configured to be vertically divided, and is connected by a bolt 80 and a nut 81 with a gasket 74 sandwiched between the lower flange 65a and the upper flange 65b. A valve seat 64 having a communication hole 64a is provided inside the valve body 65 on the upper flange 65b side. A valve guide 66 having a through hole 66a is disposed on the lower flange 65a. A shaft member 67 is inserted into the communication hole 64a of the valve seat 64 and the through hole 66a of the valve guide 66 so as to be movable up and down.

  The shaft member 67 has a disc portion 67a at the lower end thereof, and a valve body 67b that covers the valve seat 64 from below is fixed on the upper side.

  A mounting ring 75 is welded to the inner surface of the upper end 60 a of the cylindrical portion 60. A guide member 68 formed by bending a steel bar is placed on the mounting ring 75. A float ball 69 is accommodated in the guide member 68 so as to float. The float ball 69 presses the disc portion 67a of the shaft member 67 when the receiver tank 6 is full, and closes the valve seat 64 with the valve body 67b. The guide member 68 is configured to be removable from the tubular portion 60 after the valve body 65 is removed.

  An inspection opening 76 is formed at the upper end of the valve body 65. The inspection opening 76 can be opened and closed by an opening / closing lid 77 having a handle 77a.

  A connection portion 78 for connecting to the connection air hose 9 is provided on the upper side of the valve body 65, and a coupling 79 is fastened to the connection portion 78.

-Operation-
Next, the operation of the vacuum car 1 according to the present embodiment will be described.

  First, when sucking human waste, sewage or the like, the vacuum pump 4 is driven via the PTO to reduce the atmospheric pressure in the receiver tank 6 as indicated by the dashed-dotted arrow in FIG. . Thus, urine or the like is collected from the suction hose 21 into the receiver tank 6. Moisture in the air that causes a failure of the vacuum pump 4 is absorbed by the drain separator 12. The air discharged from the vacuum pump 4 is recovered by the sub oil separator 14 and the oil separator 15 and then released to the atmosphere through the deodorizing device 16.

  On the other hand, when the collected matter in the receiver tank 6 is discharged, the vacuum pump 4 is first driven through the PTO and the four-way valve 10 is switched as indicated by the solid line arrow in FIG. Thus, the inside of the receiver tank 6 is pressurized. Thus, the collected matter in the receiver tank 6 is discharged from the drain hose. In addition, the air flow at the time of the middle time is shown by a broken line.

  In order to clean the sewage tank after collecting the urine from the sewage tank, first, the gear pump 25 is driven by the power transmitted to the power transmission device 3 as shown in FIG. By operating the electromagnetic pilot switching valve 26, high-pressure oil from the gear pump 25 is supplied to the hydraulic motor 27 via the electromagnetic pilot switching valve 26, and the water pump 5 is driven by the hydraulic motor 27. Then, as shown by an arrow in FIG. 6, by operating the water discharge gun 48, the cleaning water is discharged from the water tank 41 on the receiver tank 6 through the cleaning hose 47. At this time, there is no need for a separate washing car, so no extra parking space or many personnel are required. For example, if the sewage after washing is simultaneously sucked from the suction hose 21, it is extremely efficient.

  In addition, when water is supplied to the water tank 41, first, the replenishment hose 57 is connected to a water supply or the like, and the water supply valve 52 is opened to supply water as indicated by the dashed arrow. When water is supplied from the water storage tank 56, the water supply valves 53 and 55 are opened, the water supply valve 54, the drain cock 51 and the water supply on / off valve 49 are closed, and the water pump 5 is driven. As a result, the water in the water storage tank 56 is supplied to each water tank 41 as indicated by the dashed arrows.

  Next, an inspection method for the float valve 7 will be described.

  First, the opening / closing lid 77 is opened and the inspection opening 76 is looked at to check whether the float valve 7 is abnormal. In this way, the float valve 7 can be inspected by opening the inspection opening 76 without removing the entire valve body 65.

  When the foreign matter does not function normally due to adhesion of foreign matter in the float valve 7, the valve body 65 is removed.

  First, the eye nut 72 is loosened and removed from the fixing screw 63b, and the valve body 65 is rotated around the hinge portion 62. Then, the connection between the lower end portion 71 of the valve body 65 and the upper end 60a of the tubular portion 60 is easily released. And the foreign material in the valve main body 65 is removed by discharging water with the washing | cleaning apparatus 40. In some cases, the connection between the lower flange 65b and the upper flange 65a may be further released to further clean the inside. In this way, even if foreign matter adheres to the float valve 7, the valve body 67 b can be moved to the valve seat 64 when the receiver tank 6 is full by removing and cleaning the valve body 65 from the tubular portion 60 of the receiver tank 6. Will surely block. Further, since the valve main body 65 itself can be attached and detached, it is not necessary to enter the receiver tank 6 through the manhole 59 and clean it as before, and the cleaning work is extremely easy.

  Further, when the float ball 69 is cleaned and inspected, the guide member 68 is removed for cleaning and inspection. For this reason, the float ball 69 is not dropped into the receiver tank 6.

  Conversely, when the valve main body 65 is attached, the lower end portion 71 of the valve main body 65 may be placed on the upper end 60a of the tubular portion 60 and fastened with the eye nut 72, so that the float valve 7 can be easily attached and detached.

-Effect of the embodiment-
Therefore, according to the present embodiment, the float main body 65 of the float valve 7 can be freely attached to and detached from the cylindrical portion 60 on the upper surface of the receiver tank 6 so that the float valve 7 can be cleaned and inspected extremely easily and reliably. Can do.

  Further, by connecting the outer periphery of the upper end 60a of the tubular part 60 and the lower end part 71 of the valve body 65 with the hinge part 62, the connection between the valve body 65 and the tubular part 60 can be easily released, so that the float valve 7 can be cleaned and inspected very easily.

  Further, since the guide member 68 that accommodates the float ball 69 so as to be able to float is removable from the cylindrical portion 60 material, the float ball 69 can be removed together with the guide member 68, and cleaning and inspection can be performed very easily.

  Further, since the inspection opening 76 is formed at the upper end of the valve main body 65, the float valve 7 can be inspected extremely easily.

(Other embodiments)
The present invention may be configured as follows with respect to the above embodiment.

  That is, in the said embodiment, although the valve main body 65 was comprised so that it could be divided | segmented up and down in the lower side flange 65a and the upper side flange 65b, it is good also as an integral thing.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or a use.

It is a side view of the vacuum car concerning the embodiment of the present invention. It is a top view of a vacuum car. It is a rear view of a vacuum car. It is an air piping figure of a vacuum car. It is a hydraulic piping figure for driving a water pump. It is a water piping figure of a washing device. It is an enlarged side view of a receiver tank. It is an expanded side sectional view of a float valve and its periphery. It is an enlarged plan view of a float valve.

Explanation of symbols

1 Vacuum car (suction car)
DESCRIPTION OF SYMBOLS 7 Float valve 60 Cylindrical part 60a Upper end 61 Ceiling opening 62 Hinge part 64 Valve seat 65 Valve main body 67 Shaft member 67a Disc part 67b Valve body 68 Guide member 69 Float ball 77 Opening and closing lid

Claims (4)

A float valve of a suction wheel that is mounted on a cylindrical portion that is disposed on the upper surface of the receiver tank of the suction wheel and forms a ceiling opening,
A valve body that covers the ceiling opening and has a valve seat inside;
A shaft member that covers the valve seat on the upper side and is movable up and down;
A float ball that presses the lower end of the shaft member when the receiver tank is full and closes the valve seat with the valve body;
The float valve of the suction wheel, wherein the valve body is configured to be detachable from the cylindrical portion. The float valve of the suction wheel according to claim 1,
One end of a hinge portion is connected to the outer periphery of the upper end of the cylindrical portion, and the lower end portion of the valve body is connected to the other end of the hinge portion. In the float valve of the suction wheel according to claim 1 or 2,
A guide member that accommodates the float ball so as to float,
The float valve of the suction wheel, wherein the guide member is configured to be removable from the cylindrical member after the valve body is removed. In the float valve of the suction wheel according to any one of claims 1 to 3,
A float valve for a suction wheel, wherein an inspection opening is formed at an upper end of the valve body, and the inspection opening is closed by an opening / closing lid.

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