JPS5844280A - Slurry pump - Google Patents

Abstract

PURPOSE:To efficiently transfer slurry by composing a slurry pump of a storage chamber, transfer cylinders, transfer pistons, a drive pipe, transfer pipes and so on. CONSTITUTION:Since pressure oil which is discharged from the front end of one cylinder chamber 12 is fed to the front end of the other cylinder chamber 12, one piston rod 14 forcibly advances while the other one 14 is retracted. A slurry inside one transfer cylinder 24 is thereby discharged by the other transfer piston 25 into a drive pipe 38 and transferred rearward in a transfer pipe 36. By retracting the other piston rod 14, the slurry inside a storage chamber 7 is sucked into the other transfer cylinder 24.

Description

[Detailed Description of the Invention] The present invention relates to a slurry pump for transferring slurry such as mortar and ready-mixed concrete, and its purpose is to facilitate maintenance and inspection and to efficiently transfer slurry. Our goal is to provide slurry pumps that can.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. However, the right side in FIGS. 1, 2, and 5 is the front.

Reference numeral 1 indicates a machine frame made of section steel, and reference numeral 2 indicates a mounting plate erected with bolts on the upper surface of the front end of the machine frame 1, and a pin hole is provided on the negative slope of the machine frame 1 as shown in Fig. 4. A pair of locking protrusions 3 having a diameter of 3a are welded, and a first
As shown in FIGS. 2 and 3, a support protrusion 4 is provided in a protruding manner. Reference numeral 5 denotes a storage tank which is attached to the mounting plate 2 so as to be openable and closable by a hinge 6 welded to the other outer surface of the mounting plate 2, and its rear end opening is brought into close contact with the mounting plate 2. This constitutes a storage chamber 7 in the shape of an open box for storing slurry. A drain hole 8 is formed on the bottom surface of the storage tank 5, and a pair of pin holes lea corresponding to the pin holes 3a are formed on the outer surface of one side of the storage tank 5 so that a stop pin 9 can be inserted thereinto. An engaging protrusion 10 is welded to correspond to the locking protrusion 3.

Reference numeral 11 denotes a hydraulic cylinder bolted to the upper surface of the rear end of the machine frame 1. On the rear surface, a pair of cylinder chambers 12 long in the front and back direction are arranged side by side, and the base end is fixed to a stone 13. As shown in detail in FIG. A display rod 16 that projects inward and whose rear end projects outside the display chamber 15 is housed.

Reference numeral 17 indicates a locking portion 16a formed at the center of the display rod 16.
and a bellows, 18, each end of which is fixed to the inner surface of the display chamber 15.
1 is a gasket interposed between the cylinder chamber 12 and the display rod 16 to prevent oil leakage from the cylinder chamber 12;
Reference numeral 9 denotes four reinforcing rods installed between the mounting plate 2 and the hydraulic cylinder 11.

A hydraulic circuit is constructed such that when one of the hydraulic pistons 13 in each cylinder chamber 12 protrudes, the other retreats, and when the other protrudes, one protrudes, and although not shown, the bellows 17 A compression spring is disposed inside, and only when the hydraulic piston 13 retreats, the display rod 16 is projected by the force of the piston 13.
The retraction is displayed, and the retraction causes a switch (not shown) such as a limit switch to be operated to change the piston operation.

20 is a mounting member bolted to the front surface of the hydraulic cylinder 11, and each piston rod 1 is attached to the front surface of the mounting member 20.
A pair of fitting protrusions 21 formed in a cylindrical shape with 4 at the center.
Grease is sealed in the internal space formed to communicate with both fitting protrusions 21 and in the fitting protrusions 21. Reference numeral 22 denotes a fixing plate that corresponds to the mounting member 20 and is welded to the mounting plate 2 in a watertight manner, and has a circular shape centered on the axis of each piston 14 (7) in the center thereof. A pair of fitting holes 23 are transparently provided. 24 is a pair of cylindrical transfer cylinders whose front end outer periphery and rear end outer periphery are respectively fitted in the fitting hole 23 and the fitting protrusion 21 in a watertight manner; 25 is slidable with respect to the cylinder 24; The transfer piston is fitted in a watertight manner as shown in FIG. The same grease as above is sealed.

Reference numeral 27 denotes a plate-shaped sliding contact member made of hard metal bolted to the front surface of the fixed plate 2-2, and the front end thereof is provided in the center of the front surface so as to be shared by both the transfer cylinders 24. An oblong sliding contact convex portion 28 serving as a sliding contact surface 28B is formed, and on the sliding contact surface 211a, on the axis of each of the transfer cylinders 24, there is formed an inner diameter of the slide portion 28 so as to communicate with the transfer cylinder 24. Both passage holes 29 having the same diameter are transparently provided. Note that this sliding contact member 2T is attached to both transfer cylinders.
□In order to fix both cylinders 24 between the front end surface of the cylinder 24 and the mounting member 20, by opening the storage tank 5 and removing the sliding member 27 from the fixing plate 22, the transfer cylinder 24 can be fixed. By pulling it out forward, the transfer cylinder 24 and transfer piston 25 can be replaced.

Reference numeral 30 denotes a support member which is fitted and welded to the upper end of the mounting plate 2 in a water-tight manner above the intermediate position of the axes of both transfer cylinders 24, and a support hole 30a is transparently formed in the center thereof. There is. Reference numeral 31 denotes a cylindrical drive member that is fitted in a watertight manner so as to be rotatable in the support hole 30B, and has a truncated conical mounting portion 31a formed at its front end.

A pipe joint 32 is fitted and fixed to the outer periphery of the rear end so as to be able to move integrally with the drive member 31, and is composed of upper and lower joint pieces 32a and 32b that are fastened to each other. A driving arm 33 that extends laterally is integrally formed on 32B to protrude.

Reference numeral 34 denotes a switching cylinder whose lower end is pivotably attached to the support protrusion 4 of the mounting plate 2, and the driving arm 3 is attached to the tip of the piston rod 35, which is driven forward and backward by hydraulic pressure.
The tip of 3 is rotatably attached to the shaft. Reference numeral 36 denotes a support member 37 erected at the center of the upper surface of the hydraulic cylinder 11.
It is a transfer pipe made of metal and fixedly supported by the pipe joint 32, and its front end is fitted into the rear inner periphery of the pipe joint 32 so as to be in sliding contact with the pipe joint 32 in a watertight manner.

Reference numeral 38 denotes a hard metal drive tube having a horizontal U-shape that is fitted into the drive member 31 and whose base end is slidably abutted against the front end of the transfer tube 36; An inflow portion 3B& whose diameter is enlarged to have the same diameter as the through hole 29 of the sliding contact member 2T is formed. 39 is the inflow part 3゛8
is a cylindrical sliding member that is fitted in a watertight manner to the sliding contact member 27, and is made of a hard metal that has low sliding friction resistance with respect to the sliding contact member 27; Its inner diameter is formed to be the same as the inner diameter of the transfer cylinder 24 so that it selectively matches and communicates with the transfer cylinder 24. 40 is a plate-shaped reinforcing member whose upper end is bolted to the mounting portion of the drive member 31, and the vicinity of the proximal end of the drive tube 38 is fitted and fixed to the upper end of the reinforcing member.
The vicinity of the tip of the drive tube 38 is fitted and fixed to the lower end thereof.

The reinforcing member 40 maintains the shape of the drive tube 38 and allows smooth movement thereof.

Next, the operation of the slurry pump configured as described above will be explained. First, to explain the function of the switching cylinder 34, the piston rod 35 protrudes (or retracts) when the piston rod 14 of each hydraulic cylinder 11 protrudes or retreats and is in a stopped state, and the piston rod 35 protrudes (or retracts) from the drive arm 33, pipe joint 32, The drive tube 38 is rotated via the drive member 31, and the sliding member 39 at the tip of the drive tube 38 is moved to the moving cylinder 2''4 side on which the piston rod 14 has retreated. The switching cylinder 34 causes the piston rod 35 of each hydraulic cylinder 11 to protrude (or retract) until the piston rod 14 of each hydraulic cylinder 11 protrudes or retreats and stops.
Retain state.

To explain the overall operation based on the operation of the switching cylinder 34 as described above, first, when one piston rod 14 of the hydraulic cylinder 11 is at the most retracted position as shown by the solid line in FIG.
The distal transfer piston 25 is in the most retracted position within one of the transfer cylinders 24 and
Inside, in front of the transfer cylinder 24, slurry sucked from inside the storage chamber T is stored. When the piston rod 14 is in the retracted state, one of the indicator rods 16 protrudes rearward to operate the switch, so that the switching cylinder 34 is moved as shown by the solid line in FIG. 8 by the operation of the switch. The piston rod 35 is moved downward and held in that state, so that the sliding member 39 at the tip of the drive tube 38 is connected to one of the through holes 29 communicating with one of the transfer cylinders 24, as shown by the solid line in FIG. The inner holes are moved to match and remain in that state.

The other piston rod 1 in the one hydraulic cylinder 11
4 and the transfer piston 25 at its tip protrude to the front end of the other transfer cylinder 24 as shown by the chain line in FIG. ing.

Here, when the pressure oil is injected into the rear end of one cylinder chamber 12 as shown by the broken line in FIG. 1 due to the operation of the switch, the front end of the cylinder chamber 12 Since the pressure oil discharged from the cylinder chamber 12 is injected into the front end of the other cylinder chamber 12, one piston rod 14 protrudes forward as shown by the arrow in the figure, and the other piston rod 14 protrudes in the opposite direction. fall back. In this way, when one piston rod 14 protrudes, the slurry in one transfer cylinder 24 is discharged into the drive tube within 3 days by the transfer piston 25 at its tip, and the slurry discharged into the drive tube 38 is transferred to the transfer tube 36. inside, it is transported backwards. Further, as the other piston rod 14 retreats, the slurry in the storage chamber 7 is sucked into the other transfer cylinder 24.

Then, when one piston rod 14 is projected to the position shown by the chain line in FIG. Activate the switch. In this way, when the switch is operated, the movement of both piston rods 14 is stopped, and the switching cylinder 34 is operated, causing the piston rod 35 to protrude as shown by the chain line in FIG. Drive member 3 via 32
1 is rotated and held in this state.

Due to this rotation of the drive member 31, the drive tube 38 and the reinforcing member 40 rotate from the position shown by the solid line in FIG.
7 on the sliding contact surface 28a of the storage chamber 7, and are moved from a position that matches one of the through holes 29 to a position that matches the other through hole 2g, and the drive pipe 38 and the reinforcing member 40 are inserted into the storage chamber 7. Stir the slurry to prevent lumps such as gravel from separating from liquids such as water.

In this way, after the switching cylinder 34 operates, the one piston rod 14 retreats to perform the suction operation of the slurry, and the other piston rod 14 protrudes to perform the operation of discharging the slurry, so that the inside of the storage chamber 7 is The slurry stored in the transfer cylinder 24 is transferred through the drive pipe 38 and into the transfer pipe 36 by alternately suctioning and discharging the respective transfer cylinders 24.

In addition, each transfer cylinder 24, transfer pipe 36 and drive pipe 38
To clean the inside, it is sufficient to operate this pump so that the sponge passes through both pipes 36 and 311 with water stored in the storage chamber 7, and also to clean the inside of each transfer cylinder 24 and the transfer piston 25. In order to more carefully clean and inspect the transfer cylinder 24 and transfer piston 25 on the side whose front end is open, each cylinder 11° 34 may be operated to clean and inspect the transfer cylinder 24 and transfer piston 25.

Next, another example of the storage tank 5 will be explained according to FIGS. 61 and 7. The storage tank 5 shown in FIG. 6 can constitute a storage chamber T that is sealed with respect to the mounting plate 2. The slurry is carried into the storage chamber 7 through a cylindrical carrying-in part 5a protruding from the lower front surface.

Further, the storage tank 5 shown in FIG. 7 is formed longer forward than in the previous embodiment, and the slurry is moved toward the mounting plate 2 by a screw conveyor 41 rotatably attached to the front plate thereof. This is what I did.

As described above, the present invention includes a storage chamber for storing slurry, a transfer cylinder with one end communicating with the storage chamber so as to be able to suck the slurry in the storage chamber, and a slider inside the transfer cylinder. a movably disposed transfer piston;
a drive pipe disposed within the storage chamber and selectively moved so that one end thereof communicates with the open end of the transfer cylinder that sucks the slurry; and a transfer pipe connected to the other end of the drive pipe. With this structure, slurry can be transferred efficiently and maintenance and inspection can be made easier, so this invention is preferable for industrial use as a slurry pump.

Note that the present invention is not limited to the above-mentioned embodiment, and for example, one transfer cylinder 24 may be eliminated, or a plurality of transfer cylinders 24 may be arranged around the transfer pipe 36 (one transfer cylinder 24 and the other transfer cylinder 24 may be provided in plural pairs, respectively). ), and in each of the transfer cylinders 24, every other transfer piston 25 is driven synchronously, and the tip of the drive pipe 38 is branched to drive every other transfer piston 25 in every other transfer cylinder 24. Configure it to match the opening end, etc.
Any changes can be made without departing from the spirit of the invention.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view showing one embodiment of the present invention, FIG. 2 is a plan view, FIG. 8 is a sectional view taken along the line X--X of FIG.
The figure is a sectional view taken along the Y-Y line in Fig. 1, Fig. 5 is an enlarged sectional view showing the rear end of the cylinder chamber of the hydraulic cylinder, and Figs. 6 and 7 are sectional views showing separate storage tanks. It is.

Claims (1)

[Claims] 1. A storage chamber for storing slurry, a transfer cylinder having one end communicating with the storage chamber so as to be able to suck the slurry in the storage chamber, and a transfer cylinder capable of sliding into the transfer cylinder. a transfer piston disposed within the reservoir chamber;
It is characterized by comprising a drive pipe that is selectively moved so that one end thereof is communicated with the open end of the transfer cylinder that sucks the slurry, and a transfer pipe that is communicated with the other end of the drive pipe. slurry pump. 2. The slurry pump according to claim 1, wherein a pair of transfer cylinders are arranged in parallel, and each transfer piston is configured such that when one protrudes, the other retracts. a The transfer pipes are arranged in parallel above between both transfer cylinders, and the drive pipe is horizontally U-shaped so that both openings face the transfer cylinder and transfer pipe side.
Claim 2 characterized in that it is in the shape of a letter.
Slurry pumps as described in Section. 4. The slurry pump according to claim 1, wherein the storage chamber is composed of a mounting plate and a storage tank, and the storage tank is attached to the mounting plate so as to be openable and closable.