JPS6319719B2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field and Purpose This invention relates to a squeeze pump for pumping out slurry such as mortar or ready-mixed concrete.The purpose of the present invention is to smoothly pump a low slump poorly mixed slurry that has little moisture and therefore poor fluidity. The present invention is based on the discovery that if air is mixed into the slurry, the slurry can be smoothly transferred by the squeeze pump.

Embodiment An embodiment embodying the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a hopper for storing a low-slump poorly blended slurry S having poor fluidity, and its lower end opening is used to store the slurry S. Leading conduit 2
It is continuous. Reference numeral 3 denotes a squeeze pump for transferring the slurry S, in which an elastic tube 4 is bent into an arc shape on the inner surface of a pump case 3a, and a rotating shaft is rotationally driven by a motor (not shown). A squeeze roller 7 is supported at the tip of a rotary arm 6 fixed to the rotary arm 5 . When the rotary arm 6 is rotated in the direction of the arrow in FIG. is transferred from the suction side X to the discharge side Y of the squeeze pump 3. Further, the suction side X tip of the elastic tube 4 is connected to the conduit 2.

Reference numeral 8 denotes an outside air introduction pipe that penetrates through the conduit 2, and the tip of the inner part of the conduit 2 is filled with slurry S.
A check valve (not shown) is provided at the proximal end of the outside air introduction pipe 8 to prevent clogging, and a solenoid valve whose opening/closing operation is controlled by a timer 9 is provided at the base end of the outside air introduction pipe 8. 10 is provided to communicate or disconnect the inside and outside of the conduit 2. And the same timer 9 is dial 9
a and 9b, the opening time and closing time of the solenoid valve 10 can be adjusted independently.

Next, the operation of the squeeze pump and outside air introduction device configured as described above will be explained.

Now, when the rotating shaft 5 is rotated and the squeeze roller 7 is rolled, negative pressure is generated on the suction side X of the elastic tube 4. At this time, the solenoid valve 10 opens and closes according to the opening and closing times preset by the dials 9a and 9b of the timer 9, so that air is naturally sucked into the suction side X of the elastic tube 4 intermittently. At the same time, the slurry S stored in the hopper 1 is guided to the suction side X through the conduit 2.
Therefore, as shown in FIG. 1, the slurry S mixed with air bubbles B is introduced into the suction side X of the tube 4 in some places.

When the rotating arm 6 is rotated and the squeeze roller 7 begins to press the elastic tube 4 containing the slurry S, the air bubbles B in the slurry S are compressed and simultaneously pushed toward the inner peripheral surface of the tube 4. As a result, the slurry S on the pressing portion by the roller 7 moves. In this state, when the squeeze roller 7 rolls in the direction of the arrow in the figure, the slurry S is transferred to the elastic tube 4.
is transferred from the suction side X to the discharge side Y.

In this way, the air bubbles B in the slurry S are reduced in volume by the pressure of the squeeze roller 7, thereby increasing the fluidity of the low slump poorly mixed slurry S and reducing the volume of the air bubbles B in the area pressed by the squeeze roller 7.
In addition to facilitating the movement of the slurry S, the air bubbles B pushed to the inner circumferential surface of the elastic tube 4 act as a lubricant between the tube 4 and the slurry S, allowing the slurry S to be transferred smoothly, and the roller It is also possible to reduce the load on the motor that drives 7.

In addition, since the air bubbles B supplied from the outside air introduction pipes 8 and 12 can be supplied into the elastic tube 4 by natural suction without using a machine or the like, there is no need to provide a special air supply mechanism, etc. The entire device can be made to have an inexpensive and simple structure, and can also be made to be less likely to break down and have high durability.

Next, another embodiment embodying the present invention will be described with reference to FIG. 2. Reference numeral 11 is a timer with a built-in solenoid valve (not shown) latched onto the outer surface of the hopper 1, and is controlled by dials 11a and 11b. The opening time and closing time of the solenoid valve can be adjusted independently. Reference numeral 12 is a vinyl tube serving as an outside air introduction pipe whose base end is connected to the solenoid valve, and whose tip is suspended from the upper end opening of the hopper 1 into the inside of the hopper 1 and opened near the bottom of the hopper 1. . This vinyl tube is inserted into the U-shaped steel pipe 13 near the upper end of the hopper 1, and air can be intermittently supplied to the base end of the conduit 2 at the outlet of the hopper 1 by opening and closing the solenoid valve. ing.

In this case as well, the bubbles B can improve the fluidity of the low slump poorly blended slurry S, and act as a lubricant between the elastic tube 4 and the slurry S, making the slurry S smooth. can be transferred to

Then, a vinyl tube 12 is used as an outside air introduction pipe.
By using the slurry and suspending it in a floating state in the hopper 1, the opening at its tip is unlikely to be clogged even by the backflow of the slurry S, and even if it becomes clogged, the tip can be simply cut off. In addition, by covering and protecting the vinyl tube 12 near the upper end of the hopper 1 with the steel pipe 13, bending of the tube 12 can be prevented and air can be conducted reliably.

Note that this invention is not limited to the above-mentioned embodiments, and various parts may be modified without departing from the spirit of the invention, such as mechanically opening and closing the outside air introduction pipe using the power of a squeeze roller drive motor. It is also possible to change the configuration arbitrarily.

Effects As stated above, this invention provides elastic tube 4
By intermittently supplying air to the suction side
Not only can the bubbles B be transferred smoothly using a conventional squeeze pump, but also the bubbles B are supplied into the elastic tube 4 by the negative pressure of the squeeze pump itself, so the entire device is inexpensive and simple. It has excellent effects in that it can be made into a structure that is difficult to break down and can be made highly durable.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention;
FIG. 2 is a longitudinal sectional view showing another embodiment. Squeeze bomb...3, pump case...3
a. Elastic tube...4. Squeeze roller...
7, Outside air introduction pipe...8, Timer...9,11,
Solenoid valve...10, Slurry...S, Bubbles...B.

Claims (1)

[Scope of Claims] 1. A squeeze pump 3 in which an elastic tube 4 is housed inside a pump case 3a, and a plurality of squeeze rollers 7 move to roll and press the elastic tube 4 to suction and discharge slurry S. In,
Air bubbles B are intermittently generated on the suction side X of the elastic tube 4 by the negative pressure generated by the squeeze pump 3.
A pumping device for low slump, poorly mixed slurry, characterized in that it is provided with outside air introduction pipes 8, 12 and opening/closing devices 9, 10, 11 for the outside air introduction pipes 8, 12 so as to supply the same. 2 The opening/closing device is a solenoid valve 10 whose opening time and closing time can be respectively adjusted by timers 9 and 11.
A pumping device for low slump poorly blended slurry according to claim 1, characterized in that it is constructed of: 3 The outside air introduction pipe has a tube 12 hanging down from the upper end opening of the hopper 1 into the inside of the hopper 1, and a conduit 2
A pumping device for a low slump poorly mixed slurry according to claim 1, which has an opening near the base end. 4 Tube 12 connects steel pipe 1 near the upper end of hopper 1
3. A pumping device for low slump poorly blended slurry according to claim 1.