JPS6361444B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention mainly relates to a sludge suction vehicle using a dump joint.

Conventionally, a vacuum generator is fixedly installed at the front of a loading platform, while a storage tank is attached to the rear so that it can be raised or lowered, and the suction side of the vacuum generator and the top of the storage tank are connected to a suction pipe with a dump joint interposed. Connected sludge suction trucks are known.

Such sludge suction trucks were configured to discharge the contents of the storage tank in a dump state in which the storage tank is erected, so that the contents contained therein may include things that tend to adhere to the inner surface of the tank, such as sludge. However, there was a problem in that they adhered to the inside of the tank and could not be completely drained.

Therefore, it is possible to apply pressure-feeding discharge by supplying compressed air into the storage tank, but in the sludge suction vehicle mentioned above, when the storage tank is dumped and the dump joint is separated, the storage tank is opened to the atmosphere. Therefore, in the dump state, that is, in the state where the storage tank is tilted, it was not possible to pump and discharge the water. Furthermore, when the storage tank is kept horizontally, even if pressure discharge is applied, there is a problem in that it is difficult to completely discharge the sludge that has settled in the storage tank.

The present invention has been made in view of this point, and enables pressure-feeding and discharge using compressed air when the storage tank is tilted (dumped state), thereby almost completely discharging the contents in the storage tank. The purpose is to provide a suction vehicle that can.

In order to achieve the above-mentioned object, the present invention fixes a vacuum generator at the front part of a vehicle loading platform, and attaches a storage tank to the rear thereof so that it can be raised or lowered, so that the suction side of the vacuum generator and the upper part of the storage tank are connected to each other. are connected via a suction pipe interposed in the middle with a dump joint that separates when the storage tank is raised, while the discharge side of the vacuum generator or the discharge side of another pressure generator,
It is connected to the bottom of the storage tank via a pressurizing pipe as appropriate, and furthermore, an on-off valve is interposed in the middle of the suction pipe on the side of the storage tank from the dump joint, which is closed when the storage tank is raised and opened when it is collapsed. Features.

Embodiments of the present invention will be described in detail below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a sludge suction vehicle, in which a roots blower 3 (vacuum generator) is fixedly installed at the front of a vehicle loading platform 2, and a storage tank 4 is installed at the rear so as to be able to rise and fall. The suction side of the Roots blower 3 is a suction pipe in which a first rotary valve 6, a vacuum breaker 7, a first water scrubber 8, a cyclone 9, and a dump joint 10 are interposed in the communication part 5 at the upper part of the storage tank 4 in order from the front side. 11. On the other hand, the discharge side of the Roots blower 3 is connected to the second water scrubber 1.
2 and the second rotary valve 13 to the outside. The first and second rotary valves 6 and 13 are interlocked, and the operation handle 14 is used to switch between sludge suction operation and sludge discharge operation.

At the bottom of the storage tank 4, via a pressurizing pipe 15,
The discharge side of the Roots blower 3 (specifically, the second water scrubber 12 and the second rotary valve 1
3) connected to the nozzle assembly 1
7, 17, and 17 are appropriately arranged. Note that the same effect can be obtained even if the nozzle assemblies 17, 17, 17 are connected to a separately provided compressor 16 (pressure air generator) via a connecting pipe 16a instead of being connected to the discharge side of the Roots blower 3. can be obtained.

In addition, 18 is the PTO mechanism of Roots blower 3, 1
9 is a drive shaft, 20 is a V-belt, 21 is a suction hose for sludge, 22 is a buttful plate installed opposite to the outlet of the suction hose 21, 23 is an outlet for pressurized discharge of sludge, 24 is a hose reel, 25 is a relief valve, and 26 is an atmospheric port.

Although not shown in FIGS. 1 and 2, an on-off valve 31 is interposed in the middle of the suction pipe 11 closer to the storage tank 4 than the dump joint 10, as shown in FIGS. 3 and 4. ing.

One end of the rotating shaft 31a of the opening/closing valve 31 protrudes to the outside, and an L-shaped lever member 32 is fixed to the protruding one end. Lever member 32
is the first lever part 3 in the same direction as the opening/closing valve 31
2a and a second lever part 32b perpendicular to the opening/closing valve 31, and when the dump joint 10 is joined, the first lever part 32a (opening/closing valve 31) is arranged so that it almost coincides with the axial direction (flow direction) of the suction pipe 11. It's summery.

On the other hand, an L-shaped engagement member 34 is fixed to the vicinity of the dump joint 10 of the suction pipe 11 on the cyclone 9 side via a bracket 33. This engagement member 34 includes an extension portion 34a extending along the axis of the suction tube 11 from the bracket 33 to near the lever member 32, and an engagement portion 34b extending from the tip of the extension portion 34a in a direction perpendicular to the axis. The engaging portion 34b engages with the second lever portion 32b to close the opening/closing valve 31 when the storage tank 4 is upright, while contacting and engaging the first lever portion 32a when the storage tank 4 is falling down. The opening/closing valve 31 is configured to open when the opening/closing valve 31 is opened.

Next, the operation of the suction wheel 1 will be explained. First, when performing forced discharge using compressed air, the storage tank 4 is raised to a predetermined inclined state (the lowest position is near the discharge port 23). . At this time, as the dump joint 10 separates, the engaging portion 34b of the engaging member 34 on the stationary side engages with the second lever portion 32b of the lever member 32 on the movable side, as shown in FIGS. 5a to 5c. While a force is applied to engage and prevent movement (displacement) of the first lever portion 32a, no external force is applied to the first lever portion 32a.
Rotate approximately 90 degrees counterclockwise with a. As a result, the on-off valve 31 fixed to the rotating shaft 31a also rotates approximately 90 degrees, so that the moving end of the suction pipe 11, that is, the end on the storage tank 4 side, is closed by the on-off valve 31. becomes.

Thus, by operating the operating handle 14, the first and second rotary valves 6, 13 are rotated 90 degrees clockwise from the state shown in FIG. When the roots blower 3 (or compressor 16) is operated by connecting to the nozzle assemblies 17, 17, 17, compressed air is supplied into the storage tank 4 through the pressurizing pipe 15, thereby blowing the sludge in the storage tank 4. is almost completely discharged through the discharge port 23. In other words, since the storage tank 4 is tilted, sludge collects near the discharge port 23 at the rear.
The synergistic effect of relatively easy discharge and the fact that even substances that tend to adhere to the inner surface of the tank, such as sludge, gather near the discharge port 23 due to the floating and peeling action of compressed air, significantly accelerates sludge discharge. and is almost completely excreted.

Moreover, if the storage tank 4 is laid down to be in a horizontal state, contrary to the above case, as the separation end of the dump joint 10 approaches, the engagement part 3 of the engagement member 34
4b engages with the second lever portion 32a of the lever member 32 and prevents its movement (displacement), so that the lever member 32 is rotated approximately 90 degrees counterclockwise and returned to its original state (FIG. 5a). ). Therefore, the opening/closing valve 31 is aligned with the axial direction of the suction pipe 11, and the sludge suction operation is possible. however,
The first and second rotary valves 6, 13 are returned to the state shown in the drawings by the operating handle 14.

In this way, by simply raising and lowering the storage tank 4, the opening/closing operation of the on-off valve 31 interposed in the middle of the suction pipe 11 on the side of the storage tank 4 from the dump joint 10 is automatically performed. be exposed.

In the above embodiment, a mechanical mechanism is used as an automatic opening/closing mechanism for the on-off valve 31, but as schematically shown in FIG. A hydraulic cylinder 43 (or an electric cylinder) connected to the opening/closing valve 42 is provided, whereby the hydraulic cylinder 43 is actuated in response to the up/down signal from the limit switch 41, and an electric cylinder is connected to open/close the opening/closing valve 42. An automatic opening/closing mechanism may also be used. It goes without saying that similar effects can also be obtained by using a manual on-off valve that is opened and closed by an operator only when necessary.

As described above, the present invention has an on-off valve interposed in the middle of the suction pipe on the side of the storage tank from the dump joint, so it is possible to pressurize and discharge the storage tank with it tilted, and almost all the contents in the storage tank can be removed. Can be completely drained.

Furthermore, if an automatic opening/closing mechanism is provided that automatically opens and closes the opening/closing valve in conjunction with the raising and lowering operations of the storage tank, the opening/closing operation can be performed accurately and easily.

[Brief explanation of drawings]

The drawings illustrate embodiments of the present invention, and FIG. 1 is an overall configuration diagram of the sludge suction vehicle, FIG. 2 is a schematic air circuit diagram thereof, FIG. 3 is an enlarged detailed view of the vicinity of the dump joint of the suction pipe, and FIG. 4 is a view taken in the direction of arrow A in FIG. 3, FIGS. 5 a, b, and c are explanatory diagrams each explaining the opening and closing operations of the on-off valve, and FIG. 6 is a schematic explanatory diagram of another embodiment. 1...Sludge suction vehicle, 2...Vehicle loading rod, 3...
Roots blower, 4...Storage tank, 10...Dump joint, 11...Suction pipe, 15...Pressure pipe, 16...Compressor, 31...Open/close valve, 32...Lever member, 34...Engagement member, 4
1...Limit switch, 42...Opening/closing valve,
43...Hydraulic cylinder.

Claims (1)

[Claims] 1. A vacuum generator is fixedly installed at the front of the vehicle loading platform,
A storage tank is attached to the rear of the tank so that it can be raised and lowered, and a dump joint that separates the suction side of the vacuum generator and the upper part of the storage tank when the storage tank is raised is connected via a suction pipe interposed in the middle, while the vacuum The discharge side of the generator or the discharge side of another pressure generator is connected to the bottom of the storage tank via a pressurizing pipe, and the storage tank is erected in the middle of the suction pipe on the side of the storage tank from the dump joint. A suction vehicle characterized by having an open/close valve that is closed when the vehicle is collapsed and opened when the vehicle is collapsed. 2. The suction wheel according to claim 1, wherein the opening/closing valve is provided with an automatic opening/closing mechanism that opens and closes the opening/closing valve in conjunction with the up-and-down movement of the storage tank.