MOBILE HIGH SOLID SUBSTANCE PUMP

Description

[0001] The invention relates to a mobile thick matter pump for conveying thick matter, comprising a trailer chassis, a pump unit arranged on the trailer chassis and designed as a two-cylinder piston pump, and a drive motor arranged on the trailer chassis, which drives the pump unit for conveying thick matter.

[0002] US 4 527 959 A concerns a pump for flushing boreholes, which is mounted on a trailer.

[0003] US 4 616 979 A, ​​on the other hand, concerns a mobile pumping system for pumping water from irrigation ditches and the like.

[0004] US 3 807 706 A discloses a mobile slurry pump for conveying concrete, comprising a trailer chassis, a pumping unit arranged on the trailer chassis, which is supplied with slurry to be conveyed via a feed hopper arranged on the rear of the trailer chassis, and a drive motor arranged on the trailer chassis, which drives the pumping unit for conveying slurry.

[0005] US 4 298 288A relates to a mobile thick matter pump for conveying thick matter, with a trailer chassis, a pump unit arranged on the trailer chassis and designed as a two-cylinder piston pump, and a drive motor arranged on the trailer chassis which drives the pump unit for conveying thick matter, wherein the pump unit is arranged off-center, ie laterally offset in a first direction relative to the longitudinal center plane of the trailer chassis on the trailer chassis, while the drive motor is also arranged off-center, specifically laterally offset in a second direction opposite the first direction relative to the longitudinal center plane on the trailer chassis.

[0006] Other prior art trailer-mounted sludge pumps typically feature a pump unit consisting of two hydraulic drive cylinders, a water tank, two delivery pistons, and a pipe switch housing with the pipe switch mounted centrally in the direction of travel, i.e., longitudinally, of the trailer chassis above the wheel axle. Such two-cylinder piston pumps are preferably used for concrete pumping. However, the pump unit for conveying sludge can be, for example, a single-cylinder piston pump, a screw pump, a rotor pump, or similar. The drive motor, which drives the pump unit for conveying sludge, is typically mounted above it. This arrangement has two major disadvantages.For one thing, the trailer's center of gravity is located high above the chassis's wheel axle, resulting in unstable handling of the trailer, which may weigh over two tons. Second, the location of the drive motor above the pump unit results in very poor accessibility to the pump unit, particularly to the water tank in the case of a two-cylinder piston pump, which, however, must be opened regularly for cleaning, replacing the delivery pistons, etc.

[0007] The object of the invention is therefore to provide an improved slurry pump that enables more stable operation and a more compact design. In particular, the pump unit should be easily accessible, thus facilitating maintenance work.

[0008] This problem is solved by a thick matter pump with the features of claim 1.

[0009] Because the pump unit is arranged off-center, i.e. laterally offset in a first direction relative to the longitudinal center plane of the trailer chassis, while the drive motor is also arranged off-center, specifically laterally offset in a second direction opposite to the first direction relative to the longitudinal center plane on the trailer chassis, a low center of gravity of the mobile thick matter pump can be achieved, thus enabling more stable driving behavior. By arranging the pump unit laterally offset to the direction of travel of the chassis and arranging the drive motor to the side next to it, a compact design can be advantageously achieved which also offers excellent accessibility for maintenance work on the pump unit.The special arrangement of the pump unit and drive motor results in a very low center of gravity for the trailer concrete pump, and the arrangement of the drive motor next to the pump battery and a suitable arrangement of the other necessary units means that the water tank of the pump battery, in particular, remains very easily accessible for maintenance and repair work.

[0010] According to the invention, the pump unit is designed as a two-cylinder piston pump. Such a pump unit is particularly suitable for conveying thick materials and offers a compact design. The pump unit is preferably supplied with the thick material to be conveyed via a feed hopper located at the rear of the trailer chassis.

[0011] Furthermore, the invention provides that the pump unit has a water tank which is accessible from above via a free space formed above the water tank for maintenance and repair work. By arranging the pump unit and drive motor side by side, a free space can be created above the water tank of the pump unit in a simple manner, through which the water tank is easily accessible. This makes maintenance work, such as cleaning the water tank and replacing the pump unit's delivery pistons, easy to do. The water tank is particularly easy to access from above for maintenance work due to the side-mounted arrangement of the drive motor. A free space is formed above the water tank for this purpose. This means that a cover of the water tank can be easily removed and the water tank can be easily opened for cleaning. Furthermore, changing the delivery pistons is easy via the easily accessible water tank.

[0012] Advantageous embodiments and further developments of the invention emerge from the dependent claims. It should be noted that the features listed individually in the claims can also be combined with one another in any technologically expedient manner, thus revealing further embodiments of the invention.

[0013] According to the invention, the pump unit is arranged opposite the drive motor with respect to the longitudinal center plane of the trailer chassis. By arranging the pump unit opposite the drive motor, the center of gravity can be balanced toward the center of the trailer chassis by balancing the masses of the pump unit and drive motor toward the center of the trailer chassis in the direction of travel. This allows for stable trailer handling, particularly in curves.

[0014] Particularly preferred is an embodiment in which the trailer chassis comprises a body frame, with the pump unit and the drive motor mounted side by side on the body frame. By mounting the pump unit next to the drive motor, the body frame can be very simple and provide a low center of gravity for the mobile slurry pump. Advantageously, the pump unit and the drive motor are mounted on the same crossbeams of the body frame, allowing for a particularly lightweight body frame with few crossbeams.

[0015] An advantageous embodiment of the invention provides that the drive motor mechanically drives a hydraulic pump, which is hydraulically driven by the pump unit. By coupling the drive motor and pump unit via the hydraulic pump, the pump unit can easily achieve the pumping pressures required for conveying thick materials.

[0016] Further features, details, and advantages of the invention will become apparent from the following description and from the drawings, which show exemplary embodiments of the invention. Corresponding objects or elements are provided with the same reference numerals in all figures. They show: Figure 1 thick matter pump according to the invention, Figure 2 thick matter pump without hood, Figure 3 top view of thick matter pump, Figure 4 trailer chassis with body frame, Figure 5 trailer chassis with body frame and pump unit, and Figure 6 trailer chassis with body frame, pump unit and drive motor.

[0017] In the Figure 1Denoted by the reference numeral 1, a thick matter pump according to the invention is shown. The thick matter pump 1 has a chassis 2 of a trailer. Arranged on this chassis 2 is a body frame which is covered with a hood 11. Under the hood 11 is a pump unit 3 ( Fig. 2 ) and a drive motor 4 arranged on the trailer chassis 2 ( Fig. 2 ), which pump unit 3 ( Fig. 2 ) to convey thick matter.

[0018] These components of the slurry pump 1 are in Figure 2 to better see where the hood 11 ( Fig. 1 ) away. In Figure 2It can be seen that the pump unit 3 is arranged laterally offset in the direction of travel 30 of the trailer chassis 2 relative to the longitudinal center plane of the trailer chassis 2, while the drive motor 4 is arranged laterally next to the pump unit 3 in the direction of travel 30 of the trailer chassis 2, ie laterally offset in the opposite direction. While the complete pump unit 3 is arranged to the right of the center 31 ( Fig. 3 ) of the chassis 2, the drive motor 4 is located towards the center 31 ( Fig. 3) of the chassis 2 opposite each other on the left side of the chassis 2 in the direction of travel 30. In this way, the pump unit 3 and the drive motor 4 are arranged next to each other on the body frame 5. With the arrangement of the drive motor 4 next to the pump unit 3, which is laterally offset in the direction of travel 30, the pump unit 3 is accessible for maintenance work. The pump unit 3, designed as a two-cylinder piston pump, has a water tank 6 which, due to the lateral arrangement of the drive motor 4, is particularly well accessible from above for maintenance work. For this purpose, a free space 7 is formed above the water tank 6, which can be opened after removing the hood 11 ( Fig. 1) is exposed. This allows the cover 12 of the water tank 6 to be easily removed and the water tank 6 can be easily opened for cleaning. The replacement of delivery pistons is also easily possible via the easily accessible water tank 6. The drive motor 4, which can be designed as an internal combustion engine or an electric motor, mechanically drives a hydraulic pump 8, via which the pump unit 3 is hydraulically driven. The thick matter pump 1 also has a hydraulic tank 21, a hydraulic control block 22, which is also easily accessible for maintenance and adjustment work, a fuel tank 23 and an operating and control unit 24. For reasons of clarity, the Figures 2 to 6The illustration of the naturally required hydraulic hoses between the hydraulic pump 8 and the pump unit 3 has been omitted. The pump unit 3 is supplied with the thick material to be conveyed via a feed hopper 13, which is arranged at the rear of the trailer chassis 2. The feed hopper 13 arranged at the rear of the trailer chassis 2 has a pivoting hopper cover 14, with which an upper filling opening of the feed hopper 13 can be closed in a pivoting position, as shown in Figure 1 to see.

[0019] An air-cooled hydraulic oil cooler 9 is arranged in front of the pump unit 3 and the drive motor 4 in the direction of travel 30 of the trailer chassis 2. Furthermore, an air-cooled cooler 10 for the drive motor 4 is arranged behind the drive motor 4 in the direction of travel 30 of the trailer chassis 2. The air flow 32, indicated by an arrow, through the two coolers 9, 10 opposite the direction of travel of the trailer chassis 2 is coupled to one another in such a way that the cooling air from the hydraulic oil cooler 9 is at least partially guided through the cooler 10 for the drive motor 4.

[0020] According to Figure 31 is a plan view of the slurry pump 1, although some components of the slurry pump have not been shown for the sake of clarity. This illustration shows that the pump unit 3 is offset laterally to the right of the chassis center 31 in the direction of travel 30 of the chassis 2, while the drive motor 4 is arranged next to the pump unit 3, offset laterally to the left of the chassis center 31 in the direction of travel 30 of the chassis 2. The pump unit 3, consisting of two hydraulic drive cylinders 15, the water tank 6, two delivery pistons 16 and a pipe switch housing 17 with pipe switch 18, are offset laterally to the drive motor 4 in such a way that the latter forms a counterweight to the pump unit 3 in relation to the chassis center 31 indicated by a dash-dotted line. The pump unit 3 and the drive motor 4 are also balanced relative to the wheel axle 19 of the chassis 2.

[0021] The Figure 4shows a view of the chassis 2 with the body frame 5 mounted thereon. The body frame 5 has a total of three inner crossbeams 20 on which the drive motor 4 and the pump unit 3 are mounted next to each other.

[0022] With the Figure 5 chassis 2 is according to Figure 4 shown, where the pump unit 3 is already mounted on the mounting frame 5. Next to the pump unit 3 there is sufficient space to install the drive motor 4 ( Fig. 6 ) is also to be mounted here on the body frame 5.

[0023] As from Figure 6 As can be seen, the drive motor 4 is mounted according to the invention next to the pump unit 3 on the mounting frame 5, so that a compact design and good accessibility for maintenance work is provided.

[0024] The two-cylinder piston pump is shown here horizontally, meaning the two pump cylinders are positioned side by side. However, it would also be conceivable to arrange the two pump cylinders one above the other, for example. List of reference symbols

[0025] 1 Mobile slurry pump 2 Trailer chassis 3 Pump unit 4 Drive motor 5 Body compartments 6 Water tank 7 Free space 8 Hydraulic pump 9 Hydraulic oil cooler 10 Cooler for the drive motor 11 Hood 12 Cover (water tank) 13 Feed hopper 14 Hopper cover 15 Drive cylinder 16 Delivery piston 17 Pipe switch housing 18 Pipe switch 19 Wheel axle 20 Cross beam 21 Hydraulic oil tank 22 Hydraulic control block 23 Fuel tank 24 Operating / control unit 30 Direction of travel 31 Center of the trailer chassis 32 Air duct

Claims

1. A mobile thick matter pump (1) for conveying thick matter, comprising - a trailer chassis (2), - a pump unit (3) that is configured as a two-cylinder piston pump and is arranged on the trailer chassis (2), and - a drive motor (4) that is arranged on the trailer chassis (2) and drives the pump unit (3) to convey thick matter, wherein the pump unit (3) is arranged off centre on the trailer chassis (2), i.e. laterally offset in a first direction relative to the longitudinal centre plane of the trailer chassis (2), while the drive motor (4) is also arranged off centre on the trailer chassis (2), and specifically laterally offset in a second direction, opposite to the first direction, relative to the longitudinal centre plane, characterised in that the pump unit (3) has a water box (6), wherein, owing to the lateral arrangement of the drive motor (4), the water box (6) is accessible from above for maintenance and repair work via a free space (7) formed for that purpose above the water box (6), such that the delivery pistons (16) of the pump unit (3) can be replaced via the water box (6), wherein the free space (7) above the water box (6) permits the removal of a cover (12) of the water box (6) so that the water box (6) can be opened for cleaning.

2. Thick matter pump (1) according to claim 1, characterised in that the trailer chassis (2) comprises a mounting frame (5), wherein the pump unit (3) and the drive motor (4) are arranged side by side on the mounting frame (5).

3. Thick matter pump (1) according to one of the preceding claims, characterised in that the drive motor (4) mechanically drives a hydraulic pump (8), via which the pump unit (3) is hydraulically driven.