JP2992736B2 - Drainage pump truck - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage pump equipped with a drainage pump for performing drainage work on rough terrain or underwater.

[0002]

2. Description of the Related Art A drainage pump truck used for emergency drainage in the event of a water disaster, drainage for civil engineering temporary construction work, or water supply and drainage for agriculture is carried out. However, with this method, it is difficult to install a drainage pump in a wetland or flooded area where trucks are difficult to enter. In addition, it takes time until the drainage pump is installed after being transported to the drainage point, and it is difficult to take prompt measures.

For the purpose of solving such a problem, there has been proposed a self-propelled drainage pump equipped with a drainage pump and traveling. This drainage pump truck is one in which a drainage pump is fixed to the bed of a boat-shaped body that can float on water, travels on the ground or underwater to a drainage point, and drives the drainage pump mounted at the drainage point to perform drainage work.

[0004]

If the suction port of the drainage pump mounted on the body of the proposed self-propelled drainage pump truck is installed at a lower position below the body, the water level that can be drained at the drainage point is reduced. Although it can be lowered, the drainage workable range is widened, but the suction port of the drainage pump may hinder the advancement when traveling on the ground or in the water, and it may be difficult to proceed particularly in wetlands. Conversely, if the suction port of the drainage pump is set at about the height of the body, the drainage pump will not be in the way when moving on the ground or in the water, but the water level that can be drained at the drainage point will be high, and drainage at low water levels will be possible. And the drainage work area was narrowed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a self-propelled drainage pump equipped with a drainage pump which is excellent in running performance in wetlands and has a wide drainable range.

[0006]

SUMMARY OF THE INVENTION The present invention provides a crawler for driving a drainage pump truck, a body serving as a boat-type buoyant body equipped with an engine for hydraulically driving the crawler, and a drainage driven hydraulically by the engine output. A pump, comprising: a pump; and pump elevating means for vertically rotating the drain pump around a fulcrum provided at an end of the body.
When the pump is stopped at the upper limit position by the pump
The center of gravity of the pump is located inward of the body from the vertical line passing through the fulcrum.
The above object is achieved by a self-propelled drainage pump vehicle in which the upper limit position of the drainage pump is set to be installed.

[0007]

[Function] A drainage pump is attached to the body that also serves as a boat-type buoyant body so that it can rotate in the vertical direction. Even if the drainage pump does not hinder the running. Also, when the drainage pump is rotated down to the lower limit position below the waterline of the body to perform drainage work, the suction port of the drainage pump is located sufficiently below the body, and the water level that can be drained can be set low, A drainage pump truck capable of draining at low water levels is realized.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment will be described with reference to the drawings. FIGS. 1 to 3 show a drainage pump truck 1 traveling on the ground 50. FIG. This vehicle 1 is equipped with a pair of crawlers 2 on both left and right sides of a boat-shaped body 3. A drain pump 4 is provided at an end 3 b protruding rearward of the body 3 and a pump elevating means for rotating the same vertically. A hydraulic cylinder 5 is provided.

The crawler 2 is an endless belt made of a rubber core.
A sprocket wheel 7 and an idler wheel 8 are engaged with the front and rear ends of the crawler 2, and a plurality of track rollers 9 arranged in series on the ground-side inner surface of the crawler 2 are engaged. The sprocket wheel 7, idler wheel 8 and each track roller 9 are rotatably supported by a chassis 10 that supports the body 3. The pair of left and right crawlers 2 are rotationally driven by a hydraulic drive system directly connected to an engine 6 built in the body 3 to move the vehicle 1 back and forth (left and right in FIG. 1) on the ground 50. In addition, on the surface of the crawler 2, a fold-like projection 2 'having both a non-slip function and a webbing function in the width direction of the crawler 2 is provided.
Are integrally formed at equal intervals, and the vehicle 1 enters the water and the body 3
The crawler 2 is driven to rotate underwater in a state in which the vehicle 1 floats, and the protrusion 2 ′ scrapes the water to move the vehicle 1 back and forth.

An iron wheel is used for the sprocket wheel 7 and the idler wheel 8 for driving the crawler 2, and a resin roller of engineering plastic soaked in oil is used for the track roller 9. That is, the resin-made track roller 9 has a lower specific gravity and a lighter weight than an iron roller, and makes the traveling performance of the vehicle 1 and the buoyancy in water excellent. For example, in the vehicle 1 using eight track rollers 9 for one crawler 2, the track rollers 9 are made of MC901 nylon (trade name, manufactured by Polypenco Japan).
When manufactured with a specific gravity of 1.17), the gross vehicle weight is reduced by about 500 kg compared to the one using iron track rollers,
As a result, the traveling performance and the buoyancy are improved.

If the track roller 9 is a mere resin roller, it may swell with water during running in water and its dimensions may change, resulting in a decrease in running performance. The oil is impregnated in the roller itself by immersion. The track roller 9 thus immersed in oil
Becomes a waterproof type roller, suitable for traveling underwater.

A boat-shaped body 3 supported by a pair of left and right crawlers 2 has a rectangular box-shaped upper buoyant body 3a above the crawlers 2 and an intermediate position between the pair of crawlers 2 from the bottom plate of the upper buoyant body 3a. And a box-shaped lower buoyant body 3c projecting downward. With such a configuration, left and right swinging during floating is reduced. The upper buoyant body 3a is a box type with an open upper end and a bottom. A box type end 3b is integrally provided at a lower part of one side wall, and a drainage pump 4 is installed on an upper surface of the box type end 3b. The engine 6 and a radiator 11 and an oil cooler 12 for cooling the engine 6 are provided in the upper buoyant body 3a. Further, a radio receiver 13, a wired control panel 14, a radio control panel 15, a hydraulic oil tank 16, a fuel tank 17, a battery 18, a hydraulic control valve box 19, a bilge pump 20, and the like are installed at predetermined locations in the upper buoyant body 3a. Is done. An upward air duct 21 is attached to a side wall of the upper buoyant body 3a opposite to the box-shaped end 3b, from which outside air is sent to the oil cooler 12 and the radiator 11.

The wireless receiver 13 and the wireless control panel 15 are for remotely controlling the vehicle 1 wirelessly, and the wired control panel 14 is for remotely controlling the vehicle 1 wired. That is,
The vehicle 1 is remotely operated wirelessly or by wire as needed, and is designed to prevent the occurrence of man-made disasters for the operator.
The bilge pump 20 automatically discharges water that has entered the body 3 to the outside to prevent the vehicle 1 from being submerged.

As shown in FIG. 7, the floor plate of the lower buoyant body 3c is welded to the lower part of the front and rear cross beams 111 and 112 of the chassis 10, and the upper end of the lower buoyant body 3c is made equal to the entire length of the upper buoyant body. The length of the surface is an inverted trapezoid so that the floor surface does not come into contact with the drainage pump truck at the maximum angle of climbing and descending, respectively. FIG. 8 is a view along arrow AA in FIG. 7, and FIG. 9 is a view along arrow BB in FIG.

As described above, the lower buoyant body and the upper buoyant body are welded to the chassis, so that the strength and rigidity of the chassis and the body can be enhanced. It is equipped with heavy items such as a solenoid valve group and a battery.

When the vehicle 1 enters the water, the crawler 2 and the lower buoyant body 3c are immersed in the water, and when the water level is deeper, the vehicle 1 floats on the water surface. The body 3 at this time is shown in FIG.
Above the water line Lm indicated by the chain line of FIG. The lower buoyancy body 3c provided in the middle of the pair of right and left crawlers 2 is
The stability of the body 3 on water is improved.

The lower buoyancy body 3c contains a heavy object such as an oil pan 6 'below the engine 6. By doing so, the position of the center of gravity of the entire vehicle 1 is lowered, and the vehicle 1
The posture stability is improved even when traveling on any of the land and land.

The pair of left and right drainage pumps 4 installed at the box-shaped end 3b of the upper buoyant body 3a are operably installed independently. Each drainage pump 4 has a built-in hydraulic motor 22 that is driven by hydraulic pressure based on the output of the engine 6.
The suction port 4a is formed on an extension of the rotation axis direction, and the discharge port 4b is formed on the side of the rotation axis. As shown in FIG. 6, the oil supply hose 50, the oil recovery hose 52, and the drain hose 54 are connected to the hydraulic motor 22. Since these are high-pressure hydraulic hoses having a short distance and a large diameter, if they are simply connected to a hydraulic motor 22 rotatable about a fulcrum P as will be described later, the rotational motion of the hydraulic motor 22 or the drainage pump 4 is not hindered. And the hose may be overloaded. Therefore, the oil returning hose 50, the oil recovery hose 52,
A drain hose 54 is connected to a swivel joint 56,
Hydraulic motor 2 with 58, 60 and short hoses 62, 64, 66
2 was connected. The short hoses 62 and 64 for oil supply and oil return are further connected to a pair of swivel joints 74 and 76 on both sides of the hydraulic motor 22. Swivel joint 56, 5
Reference numerals 8 and 60 denote mounting brackets 68, 70 and 72, which are upper buoyant members 3.
a to the box-shaped end 3b. This fixed position is preferably on the same axis as the fulcrum P of the buoyancy tank 23a described below. By making such a hose routing structure,
The rotational movement of the drainage pump 4 or the hydraulic motor 22 is smooth and reliable, and each hose is not forced.

The main part of the drainage pump 4 is fixed in a rectangular box-shaped pump buoyancy tank 23. The pump buoyancy tank 23 is composed of two buoyancy tanks 23a and 23b, and one of the buoyancy tanks 23a is vertically attached to a fulcrum P such as a steel pin fixed to the rear end of the box-shaped end 3b of the upper buoyant body 3a. It is rotatably connected. The vertical rotation of the buoyancy tank 23a about the fulcrum P is controlled by a hydraulic cylinder 5 which is a pump elevating means provided on the box-shaped end 3b. The hydraulic cylinder 5 has a base end opposite to the piston rod 25 rotatably connected to the box-shaped end 3 b, and the driving of the piston rod 25 is controlled by oil pressure by the output of the engine 6.

The right side in FIG. 1 where the drain pump 4 of the vehicle 1 in FIG. 1 is located is assumed to be the rear of the vehicle. The drain pump 4 in FIG. 1 is held at a predetermined upper limit position above the water line Lm with the lower surface 4c of the suction strainer directed obliquely upward and rearward of the vehicle.
Both ends of the lower surface of the buoyancy tank 23a of the drainage pump 4 at the upper limit position are connected to the fulcrum P, and the lower center of the buoyancy tank 23a is connected to the tip of the piston rod 25 of the hydraulic cylinder 5. Is maintained. The discharge port 4b of the drain pump 4 at the upper limit position faces upward, and a drain hose 26 is detachably connected to the discharge port 4b as shown in FIG. The vehicle 1 has a drain pump 4
While keeping at the upper limit position, the vehicle advances on the ground 50 and underwater to the drainage point.

The upper limit position of the drain pump 4
The center of gravity W of the vehicle is set at a fixed position in front of the vehicle with respect to the vertical line Ln passing through the fulcrum P. By doing so, the vehicle 1
If the oil pump leaks from the hydraulic system of the hydraulic cylinder 5 and the force for holding the drain pump 4 at the upper limit position is weakened during the stop and running of the hydraulic cylinder 5, the drain pump 4 is subject to its own weight and the vibration from the outside, and the center of gravity W Does not move behind the fulcrum P, and the drain pump 4 is stably held at the predetermined upper limit position.

The drain pump 4 pivots downward from the water line Lm of the body 3 around the fulcrum P from the upper limit position by driving the piston rod 25 of the hydraulic cylinder 5 forward (projecting). The drainage pump 4 pivots down to the lower limit position shown in FIG. 4B and stops at the sub lower limit position shown in FIG. Such a rotation descent of the drainage pump 4 is as follows.
This is performed at a stage where the vehicle 1 proceeds to the drainage point and starts drainage work by the drainage pump 4.

FIG. 4A shows a state in which the vehicle 1 is in the water 51 and performing drainage work, and the drainage pump 4 is at the sub-lower limit position. This sub-lower limit position is a position where the suction port 4a of the drainage pump 4 faces directly below, and the suction port 4a at this time is slightly above the height of the lower limit position of the crawler 2. When the drainage pump 4 is at the upper limit position, the piston rod 25 of the hydraulic cylinder 5 is projected and the drainage pump 4 is rotated down to a predetermined angle of 90 °, whereby the drainage pump 4 is held at the sub lower limit position. The hydraulic cylinder 5 at this time is the box-shaped end 3
The cylinder escape groove 27 is formed on the upper surface of the box-shaped end 3b so as not to come into contact with the cylinder end b. When the drainage hose 4 is operated by connecting the drainage hose 26 to the discharge port 4b of the drainage pump 4, water 51 is sucked from the suction port 4a and drained from the discharge port 4b to the drainage hose 26.

FIG. 4B shows a state where the vehicle 1 is draining water 51 on the ground 50, and the drain pump 4 is at the lower limit position. The lower limit position is a position where the drainage pump 4 at the sub-lower limit position in FIG. 4A is further rotated by about 15 ° toward the front of the vehicle, and the suction port 4a of the drainage pump 4 is close to the lowermost position of the crawler 2. become. Therefore, the suction strainer lower surface 4c enters the water 51 such as a groove below the ground 50 and can be drained. At this time, the suction position of the drainage pump 4 slightly moves in the front-rear direction, so that the vehicle 1
The suction position can be changed without moving the whole.

The driving of the pair of left and right crawlers 2, the driving of the pair of left and right drain pumps 4 and the vertical rotation of the drain pump car 1 of the above embodiment are controlled by a hydraulic drive system by a common engine 6. A specific example of the drive system will be described with reference to FIG. In FIG. 5, the right crawler of the pair of left and right crawlers 2 is 2R, the left crawler is 2L, the right drainage pump of the pair of left and right drainage pumps 4 is 4R, and the left drainage pump is 4L.
And

The engine 6 has first to third hydraulic pumps 30,
31 and 32 are directly connected. First and second hydraulic pumps 30,
31 is a closed circuit for transmitting power to the hydraulic motor, returning the amount of charge oil to the hydraulic oil tank 16 via the hydraulic oil cooler 37, and supplying hydraulic oil to the third hydraulic pump via the suction filter 36. You.

The first hydraulic pump 30 drives the right crawler 2R and the right drainage pump 4R.
When the pump control valve 34 is opened, the motor is driven to selectively drive the traveling motor 40 of the right crawler 2R and the hydraulic motor 22 of the right drainage pump 4R via the traveling / drain switching electromagnetic valve 38. The second hydraulic pump 31 drives the left crawler 2L and the left drain pump 4L. The second hydraulic pump 31 is driven when the pump control valve 35 is opened by the controller 33, and the traveling / drain switching electromagnetic valve 3 is driven.
9, the driving motor 41 of the left crawler 2L and the hydraulic motor 22 of the left drainage pump 4L are selectively driven.

The third hydraulic pump 32 includes a right drainage pump 4R
Then, the left drain pump 4L is rotated in the vertical direction to drive the bilge pump 20. The electromagnetic switching valves 42 and 43 of the hydraulic cylinder 5 of the right drainage pump 4R and the hydraulic cylinder 5 of the left drainage pump 4L are connected to the third hydraulic pump 32, and the controller 33 opens and closes the electromagnetic switching valves 42 and 43. The left and right drainage pumps 4R and 4L independently rotate vertically at a desired angle. When the controller 33 detects the intrusion of water into the body 3, the electromagnetic switching valve 4 of the bilge pump 20
4 is opened, the hydraulic motor 45 of the bilge pump 20 is operated by the hydraulic pressure of the third hydraulic pump 32, and the water in the body 3 is drained.

[0029]

According to the present invention, since the drainage pump is attached to the body also serving as a boat-type buoyant body so as to be rotatable up and down,
Hold the drain pump at the upper limit position and set the drain pump truck on the ground,
The drainage pump does not hinder the running of the water regardless of the progress of the water, so that a drainage pump with good running performance can be provided. Also,
By performing the drainage operation by rotating the drainage pump to the lower limit position, the water level that can be drained can be set sufficiently low, and a drainage pump vehicle with excellent versatility can be provided.

Further, since the position of the center of gravity of the drain pump at the upper limit position is located inside the vehicle from the fulcrum of the drain pump,
The posture of the drain pump at the upper limit position is stable, and even if there is oil leakage in the hydraulic drive system that turns the drain pump up and down,
This eliminates the danger that the drain pump will involuntarily rotate down and hang down from the body.

The track roller of the crawler is made of a resin roller immersed in oil, so that the total weight of the vehicle is reduced, the running performance and the buoyancy in water are improved, and the amphibious use allows for quick drainage work. A drainage pump truck can be provided.

Further, since the body is divided into an upper buoyant body above the crawler and a lower buoyant body which enters between a pair of crawlers, and a heavy object such as a lower portion of the engine is stored in the lower buoyant body, the center of gravity of the vehicle is lowered. The running stability and buoyancy in water are stabilized.

[Brief description of the drawings]

FIG. 1 is a side view of an amphibious drainage pump truck showing one embodiment of the present invention.

FIG. 2 is a plan view of the vehicle shown in FIG. 1;

3A is a right front view of the vehicle in FIG. 1, and FIG. 3B is a left front view of the vehicle in FIG.

FIG. 4 (a) is a partial side view of the vehicle in FIG. 1 during drainage work,
FIG. 2B is a partial side view of the vehicle in FIG. 1 during another drainage operation.

FIG. 5 is a hydraulic drive system diagram showing a specific example of a hydraulic drive system of the vehicle in FIG. 1;

FIG. 6 is a perspective view of a swivel joint of a hose connected to a hydraulic motor, in which a drain pump portion is not shown.

FIG. 7 is a side view of the chassis.

FIG. 8 is a partial cross-sectional view taken along line AA of FIG. 7;

FIG. 9 is a partial cross-sectional view taken along line BB of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Amphibious drainage pump truck 2 Crawler 3 Body 3a Upper buoyant body 3c Lower buoyant body 4 Drainage pump 4a Suction port 5 Hydraulic cylinder (pump raising / lowering means) P Supporting point W Center of gravity of drainage pump Lm Waterline Ln Vertical line 6 Engine 9 Track roller

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yukinori Hanada 23-3 Ikedanakamachi, Neyagawa-shi, Osaka Inside Oyodo Komatsu Co., Ltd. (72) Inventor Yukio Tamaki 1-1-1 Nakamiya Oike, Hirakata-shi, Osaka Inside Kubota Hirakata Factory (72) Inventor Masahiro Taniguchi 1-1-1, Nakamiya Oike, Hirakata City, Osaka Prefecture Inside Kubota Hirakata Factory (72) Inventor Akio Miura 1-1-1, Nakamiya Oike, Hirakata City, Osaka Prefecture Co., Ltd. Kubota Hirakata Plant (56) References JP-A-6-240737 (JP, A) JP-A 61-186606 (JP, U) JP-A 63-94087 (JP, U) (58) Fields investigated (Int) .Cl. ⁶ , DB name) B60F 3/00 B60P 3/00

Claims (3)

(57) [Claims] 1. A crawler for driving a drainage pump vehicle, a body serving also as a boat-type buoyant body equipped with an engine for hydraulically driving the crawler, a drainage pump driven hydraulically by the output of the engine, and a body including the drainage pump. Pump elevating means for vertically rotating around a fulcrum installed at the end of the pump, and the drain pump is raised by the pump elevating means.
The center of gravity of the drainage pump when it is moved to the
Located inward of the body from the vertical line passing through the
2. The drainage pump truck according to claim 1, wherein the drainage pump truck is set so as to have the following configuration . 2. The drainage pump truck according to claim 1, wherein the drainage pump lifting means uses a swivel joint for causing the high-pressure hydraulic hose to follow the rotation of the drainage pump. 3. The waterproof roller according to claim 1, wherein the track roller rotatably supported by the body inside the crawler and rotatably supported on the inner surface of the crawler is an oil-immersed waterproof resin roller. Drainage pump truck.