DE2023061A1 - Pump for concrete, thick matter, pasty mixtures and corrosive substances - Google Patents

Description

Murne for concrete, thick matter, pasty mixtures and corrosive substances.

The invention relates to a pump for concrete, thick matter, pasty mixtures and attacking substances. In the following, for practical reasons, in particular referred to the 3eton.

The concrete pumps used in the construction industry show in higher or to a lesser extent defects, namely phenomena of rapid wear and tear as a result the special nature of the goods required and expensive spare parts. If a premature Wear occurs, this is done at the expense of mechanical parts, which in turn are expensive due to the machining they involve.

The currently predominantly in use cylinder pumps show also have disadvantages during use. In particular, he calls the intermittent promotion In the pressure column of the concrete, vibrations and shocks emerge which meanwhile the source of damage and difficulties in use and heavy use cause of the material; this is particularly due to the rigidity the organs of the pump.

The invention has the task of providing a pump for thick matter, in particular to create concrete that is subject to the inevitable wear and tear Parts are easy to source and inexpensive. In addition, the moving parts should provide the pump with sufficient elasticity to withstand vibrations and stresses in the lines, especially in the pressure line, and the laws of Movements of the various organs should be able to be chosen optimally so that the disadvantages mentioned are avoided to the greatest possible extent Invention has two parallel and coaxially arranged discs of at least one of which has a reciprocating motion essentially along it Axis executes so that they cyclically approach each other and again from each other remove, and between the disc edges is at least one toroidal flexible and practically inextensible wall clamped, so that they are one with the panes closed chamber that changes its volume cyclically and and the pressure line for the material to be conveyed is connected with valves located in these are.

According to the invention, these valves are particularly simple in the Form a shape that each a piece of the suction line and a piece of the pressure line consist of elastic, flexible and non-expandable material, such that they can be squeezed from the outside by a presser until the inner passage is closed, and resume their free 'cross-section when the compression ceases, Here are the effects of the press on the elastic parts of the Leius with the relative movement of the willow discs synchronized to To obtain pumping effects.

To obtain special punctures, for example to rinse the pump body, this synchronous control of the presses can be canceled. You can as needed blocked or reversed in their cycle in order to reverse the pumping direction, for example, to empty the pressure pipe.

Each press can advantageously consist of two movable ones against each other There are standing roles, between which the flexible piece of the line extends and that of two symmetrically arranged and symmetrically approaching and again Removing jaws are worn0 The flexible bags of the cables can be attached to the points of application of the presser lugs made of very elastic rubber, in order to secure the Xt7i-eder expansion with these after the compression.

A pump according to the invention can be a single toroidal flexible own land, which in particular consist of a wheel tire for motor vehicles can, aessen edges are clamped at the edges of the two discs. on the other hand A pump can also have two such flexible moroids, never one with wheel tires Motor vehicles that are connected to one another along an edge, while their outer edges are clamped to the edges of the pane0 According to equivalent Embodiments of the invention can connect the suction or pressure line to the be connected to the same disk or to one disk each, or at least one the lines can open into the flexible, toroidal wall. Advantageously arranges one the suction and the pressure line coaxial to each other in the Pump axis and connects it in the middle of the two discs.

Although the pump can be oriented as desired and therefore also with horizontal or inclined axis, are according to a preferred embodiment its two discs arranged horizontally one above the other, with the suction pipe with the opening in the lower disk and the pressure line with the opening in the upper disk is connected0 Instead, it can also, since the two disks are horizontal and one above the other, one of the disks can be fixedly arranged and the suction and pressure ports contain and the other disk one of articulated drive rods form a moving pump stick0 In the pressure line, a Switching device can be arranged in the form of a slide with a fixed guide part with which a pressure line piece coming from the pump is connected, and with a moving part that provides a connection for the subsequent - at least partially flexible - has pressure line and a connection for a flexible flushing line. This movable part can be moved in three positions for pumping or for flushing the pump and for preparing the flushing of the subsequent pressure line0 In this latter position, a plug can be inserted through the exposed mouth the feed line coming from the pump is inserted to clean the pressure line, through this stopper with water pumped by the pump as the last rinsing phase can be pressed0 The pump can be used both individually and in any combination Groups are used that are powered by a single source of energy and accordingly are staggered in their beats, so that one of the so compound Group receives the desired delivery rate almost continuously in a pressure line.

The parts of the pump that are in contact with the material to be pumped, are not exposed to grinding against other parts. Apart from the possibility of the washers and the other parts, including the cables, are made of chemically resistant materials Manufacturing materials is the treatment of chemically aggressive liquids also possible simply by lining the parts that can be attacked, with insulating material0 While a piston pump of conventional type among these Circumstances would have to be built from special, chemically resistant materials, the pump according to the invention can be built with normal materials, which by a chemically insulating layer that is not subject to abrasion is because it is not exposed to any friction against other 'parts.

In the drawing, a preferred embodiment of the invention shown; 1 shows an overall view of an in operation and pump mounted on a truck; Fig. 2 in an enlarged representation Pump and accessories in side view; Fig. 3 is a plan view of Fig. 2; Fig. 4 a Side view from the side opposite FIG. 2; Fig. 5 is a view in section along the line V-V in Fig. 4; Fig. 6 in an even stronger way Enlargement of a side view of the pump in the position at the end of the suction phase is achieved; 7 is a view in horizontal section along the line VII-VII in Fig. 6; Fig. 8 is a vertical longitudinal section showing the pump during the printing phase represents; Pig. 9 is an axial section through the body that forms the pump cavity, in a position during the suction phase; 10 shows a partial section analogous to that 9, at the end of the suction phase; 11 shows an enlarged section along the Line XI-XI in Figure 6; FIG. 12 shows a section along the line XII-XII in FIG. 11 the switching device; FIG. 13, in addition to FIG. 11, the setting of the Um-14 and 15 switching device in different phases of a flushing cycle of the pump0 Fig. 16, details of the support means of the pressure pipe in FIGS. 17 and 18 folded Position, in an intermediate position and in a stretched position.

The version shown in the drawing can be placed on the loading area 1 of a truck can be set so that they can quickly move from a construction site to another or be laid within the same construction site can. The pump can also work on the truck, whereby it works Can be sucked in and not fed by a natural gradient. With 3 is a hydraulic pressure generator with its own motor as a drive for the still to be described hydraulic auxiliary drives. It is together with a container 6 for the drive means, z0B. 01, mounted on a frame 7. At 9 there is another Designated frame that has two parallel and profiled flank parts extends upwards and the actual pump 44 as well as support for a Pressure tube 92, 94 carries. Behind the rear axle of the vehicle is in the loading area a trough 13 used with a funnel 15, which the delivered concrete mass picks up in batches.

An agitator, e.g. with a horizontal axis 17 (Fig. 2), be provided.

The pump mounted on the frame 9 consists of two spaced apart disks 20, 22 (Fig. 9, 10) standing to one another, some of them have a flexible, but inextensible toroidal organ 44 is clamped, which practically from a wheel tire for motor vehicles can exist. The edge beads 44A of this tire are attached to the plate 20 or 22 with a counter plate 46 or respectively. 48 clamped0 By means of a device, the plates 20, 22 are cyclically grounded towards one another and separated from each other. For this purpose, the plate 20 has two laterally elevated triangular shapes Flanges 24, where they by means of two pairs of drive rods 26 and 28 to the Flank parts of the frame 9 is suspended. The drive rods are bolted 30 and 34 hinged to the frame 9 and with bolts 92 and 36 on the flanges 24 (Fig. 6, 7).

The two drive rods 26 and 28 form one side with their joints 30, 32, 36 and 34 an articulated parallelogram so that the upper pump stick 22, 24 Displacements parallel to yourself and in particular short nearly can perform straight shifts. A crosspiece is attached to the drive rods 26 38, with which the piston rod 40A of the piston of a cylinder 40 is connected which in turn is articulated in 42 on the frame 9. By means of this hydraulic cylinder the movement of the pump stick is controlled. With the cyclical movement of the plate the cavity 50 created by the strip 44 and by the counter plates 46 varies and 48 is limited.

The plate 20 and its counterplate 46 are central with a bore provided, to which a grommet 52 is attached to this grommet is a flexible Hose 54 made of rubber with a fabric insert or other suitable material pushed on, which attaches in the arch 56 to the emptying nozzle 13A of the trough 13 (Fig. 2).

A zone of the pipe reinforced on the outside by a collar 58 forms in cooperation with two rollers 65 a pinch valve '. The roles sit on two Jaws 62 which are symmetrical to one another and which are mounted in the frame 9 so as to be pivotable about bolts 60 and mesh in the form of tooth sectors for symmetrical movement. One of the two jaws 62 is driven directly by a cylinder 64 while the other through the meshing of the teeth the sector of the jaws is moved. The roles can compress the line piece 54, 58 until its free inner cross section is zero (Fig. 8), or they are so far apart that the Line piece expands back to a cylindrical shape for the passage of the sucked in Conveyed goods.

Correspondingly, the upper plates 22, 24 have a central bore and a spout 66 in the extension of the geometric axis of the Arrangement on the underside of the tire 44. A tube 68 is attached to this grommet connected, which is also provided with a sleeve 70 to a certain extent and with a pair of rollers 72 a pinch valve on the pressure side of the pump forms. These roles are also carried by symmetrical jaws 74, the are mounted in bolts 76 on the paddles 24 and engage with each other with toothed sectors, again one of the jaws is driven by a cylinder 78 which is between two arms 80 is mounted, which extend laterally of the flanges 24 and are firmly connected to these (Fig. 8).

A pressure line 68 ends above the valve at a groove 82 on the underside of a transverse plate 84 attached to the top of the frame 9 is attached. This smooth (Pig. 11 to 15) forms a sliding guide for one Carriage 86 which runs along the plate 84 by means of a spindle 106 which is carried by the plate 84 carried and driven by a handwheel 108, are shifted and three Can take positions.

During normal pumping, the slide is in the in 14ig. 11 position shown, in which a matching spout 82 hole in the Plate 84 communicates with a bore 88 of the carriage 86, to which a grommet 90 belongs to which a flexible piece of hose 92 is pulled.

This hose section forms the pressure pipe with rigid pipe sections 94, through which the concrete mass is conveyed to the building under construction (Fig. 1) up to a flexible hose 96 that forms the mouthpiece and the distribution permitted. The pipe sections 94 are carried by a type of ladder to be described.

The carriage 86 also carries a second grommet 98 at a bore 100, which in the second position (Fig. 13) of the carriage 86, during which the flushing of the pump can be carried out with the spout 82 and the bore in the plate 84 communicates. On the spout 98 sits a hose 102 (FIG. 2), the discharges into the basin 13.

In the third position of the slide (Fig. 14) the slide gives the hole in the plate 84 free, so that in this, for example, a plug 104 made of sponge o. The like. Can be introduced, which is a pressure filling for a flushing phase of the pressure line 92, 94, 96 forms.

In the pumping mode, the cylinder 40 is controlled to drive the drive rods 26 to impart a pendulum motion at a frequency that can be caused by the control of the hydraulic drive means, and at a speed at each stroke, which can be changed along the stroke by opening the inlet or outlet ports of the cylinder 40 controls. The width of the carried out by the piston of the cylinder Stroke can be limited by setting the position of two microswitches 1109 112 are the e.g.

be influenced by a pin 114, that of a pinion rod 28 or carried by another movable part of the drive of the pump shaft will (Fig0 6) o I, iit the cyclical displacement of the pump assembly 22, 24 will be the movements imparted to the jaws 62 and 74 by the hydraulic cylinders 64 and 68 which control the pinch valves. O Especially during lifting of the pump stick, as the volume of the cavity 50 increases, it becomes so in the length of tubing 68, 70 formed valve closed and that in the hose piece 54, 58 sucks line formed valve closed. The good is in the cavity 50 drawn in through conduit 13A, 56, 54. Note that the cavity is by means of Vacuum is filled, i.e. without a special hydraulic pressure level between the trough 13 and the cavity of the pump. This enables the trough with its judge 15 to be arranged in a sufficiently low position and thus the loading of the croges with the concrete mass, e.g. from a concrete mixer 120 a truck dimkt can be poured (Fig. 1). Right now the Reversing the downward stroke movement, the suction valve closes by moving closer together of the rollers 65, while the pressure valve by the mutual removal of the rollers 72 is opened. During the reduction phase of the volume of the cavity 50 therefore the mass is pressed into the line formed by the hoist sections 68, 92, 94, 96.- If you want to convey the mass in a more or less horizontal way, you can use the flexible one Connect line 92 in the setting 92X with the line section 94X, 96X (Fig. 3, 4).

The suction and pressure phases are carried out with the pump described, without causing special stresses and vibrations, and you can too achieve a relatively very even drainage. The parts of the pump are only subject to little wear and tear, and in any case they are particularly easy to obtain and cheap, especially the procurement of wheel tires and the replacement of one worn tire by another, new or possibly already as such can be used, is particularly simple. Can also be on the inside of the tire wall a cover may be provided to extend the life of the tire.

If you have to stop pumping, everyone has to Parts are rinsed that make up the cement mortar included or with this stand in contact to prevent their cerium hardening. The described one is used for this Switching device with the slide 86. The slide is brought out of the pumping position 11 in the flushing position of FIG. 13, in which the pressure line 92, 94, 96 is shut off and remains full of mortar and the pump is switched on in a circuit which is the suction branch 13A, 56, 54, the hose piece 68 and the return line piece 102 to the trough 13. By removing the rest of the mass that is contained in the trough is, diluted with water, you can flush this circuit and with it the cavity the pump; the rinse is repeated by also replacing the water. - After this Once this has been done, the slide carriage is shifted to the position shown in FIG in any case such that the grommet 82 and the corresponding opening in the plate 84 is exposed. You insert the plug 104 into the spout and then bring the Slide back into the position shown in Fig. 11 and resumes pumping on. Now the pump sucks in rinsing water from the trough, which from the pump into the Pressure line is pressed and the plug 104 advances by gradually the rest of the mortar9 in the drain pipe pieces 92, 94, 96 or 92X, 94X, 96X is contained-is pushed out until the plug comes out of the end of the pressure line emerges (Fig. 15). The flushing of the pressure line can continue to a limited extent before mania stops the pump.

When operation is resumed, the pump can also be used without prior Fill to be switched on. By the way, you can also fill them by using the sled 86 in the position of FIG. 14 and brings the pump with it through the line section 68 Water with injection mortar or other.

The rigid pressure line pieces 94 are provided with lattice girders 122 combined, that make them stiff. The first of these carriers, labeled 122A, becomes supported by a support 124 which is articulated in 126 on the frame 9 (Fig. 1, 2, 4). A hydraulic cylinder 128 is hinged to the support and to the frame the lifting of the support itself and the former rigid line section 94 of the pressure line to enable. Two line pieces each are on their muzzle rings with bolts 130 articulated (Figs. 16 to 18). The bolt also carries coupling pieces 132 in the form of isosceles triangles. The piston rods are on both of their base corners hinged by stretching cylinders 134, 1-36, which in turn are coupled to the two Leitangs pieces are articulated (Fig. 16 to 18). By means of simultaneous control the cylinder 134 and 136 can the two tubes 94 with their lattice girders 122 with respect to each joint 130 from the side-by-side position (Fig. 16) Moved to the straight position with simultaneous coupling of the pipes are (? fig. 18) via intermediate positions - one of which is shown in FIG.

You can push the concrete mass up to great heights.

You can also, obviously, the loading via completely flexible Make pressure lines when the difference in level is only small, as in the case using the 94X (rigid) and 96X (flexible) cables.

The elastic pump made of a rubber tire or something similar, and that The presence of one or more flexible pressure lines dampens the vibrations and the stresses resulting from the pulsating pumping. On the other hand one has the very advantageous possibility of the laws of motion of the moving parts of the pump.

It goes without saying that the drawing is only an example shows and the design may vary in porms and arrangements without falling beyond the scope of the Invention to exceed.

Claims (12)

Patent pending> smells t.) Pump for concrete, thick matter, pasty mixtures and aggressive ones Substances, characterized by two arranged parallel and coaxially to one another Discs (20, 22), at least one of which (22) have a reciprocating motion runs essentially along its own axis, so that they are cyclical to each other approach and move away from each other and between their edges at least one toroidal, flexible and practically inextensible wall (44) is clamped in such a way that that it forms a closed chamber (50) with the discs, which cyclically it Volume changes and to which the suction and pressure lines (56, 92) for the conveyed material with valves (58, 65; 70, 72) lying in these are connected. 2. Pump according to claim 1, characterized in that one piece each the suction line (54) and a piece of the pressure line (68)? sUS elastic, flexible and non-stretchable material are made in such a way that they can be externally by pressers (65, 72) are compressible until the inner passage is closed, and their Assume the free cross-section again when the compression ceases, with the effects the presser on the elastic pieces of pipe with the relative movement of the two Disks are synchronized. 3. Pump according to claim 2, characterized in that each press consists of two movable, opposing rollers (65; 72) between which the flexible piece of conduit extends and which of two extends symmetrically arranged and symmetrically approaching and departing jaws (62t 74) can be worn. 4. Pump according to claims 2 and 3, characterized in that the flexible pieces of the lines at the points of application of the presser outer sleeves (58, 70) made of very elastic rubber, which expand after being compressed to back up- 5. Pump according to claim 1, characterized in that two toroidal walls, like wheel tires of motor vehicles, are connected to one another along an edge, while their outer edges are clamped on the two disc edges. 6. Pump according to claim 1, characterized in that the suction or the pressure line is connected to the same disk. 7. Pump according to claim 1, characterized in that the suction or the pressure line is connected to one disk each. 8. Pump according to claim 1, characterized in that at least one of the lines opens into the toroidal, flexible wall. 9. Pump according to claims 1 and 7, characterized in that the Suction line and the pressure line are arranged coaxially to one another in the pump axis and are connected in the middle of the two panes (Fig. 6, 8) o 10. Pump according to claims 1 and 6, characterized in that its two discs (20, 22) are arranged horizontally, one above the other, that one of the disks is fixed is and contains the suction and pressure openings and that the other disk is a from articulated drive rods (26, 28) moving pump rod forms. 11. Pump according to one or more of claims 1 to 10, characterized characterized in that in the pressure line (68, 92). a switching device in the form of a slide is arranged with a fixed guide part (84) with which a pressure line piece coming from the pump (68) is connected, and with a movable part (86) the one connecting piece (90) for the adjoining pressure line (92) -which is at least partly flexible is -, a connector (98) for a flexible line (102) for rinsing and which can be moved into three positions in which the supply line (68) from the pump either with the outgoing pressure line (92) or with the flushing line (102) or is open. 12. Pump according to one or more of the preceding claims, characterized characterized in that the inner walls come into contact with the conveyed material Parts are lined with a protective layer to protect against attacking substances. Blank page