JPH073226B2 - Squeeze pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a squeeze pump for continuously transferring a slurry such as ready-mixed concrete mixed with aggregate.

(Prior Art) In a conventional squeeze pump, an elastic tube installed in a casing is rolled and pressed by a pressing roller to forcibly transfer a slurry such as fresh concrete in the elastic tube. Then, when the fresh concrete is pumped in a state where the inner wall surface of the discharge conduit made of rubber, resin or metal connected to the discharge side end of the elastic tube is dried, the water contained in the fresh concrete is Since it gradually adheres to and is absorbed by the inner wall surface of the discharge pipe line, water leaks from the fresh concrete and the concrete cannot be transferred. In order to avoid this, as a conventional working method, first, a predetermined amount of a wetting slurry such as cement milk or fresh mortar having a high water content is put into a hopper, a squeeze pump is operated, and the wetting slurry is By transferring to the discharge pipeline, the inner wall surface of the discharge pipeline is once moistened, and then the concrete is sent.

(Problems to be Solved by the Invention) However, the above-mentioned conventional squeeze pump first requires the work of transferring the slurry for wetting by driving the squeeze pump itself, which not only lowers the work efficiency but also causes a small amount of work. Since the wetting slurry is sucked by the squeeze pump, the wetting slurry is likely to remain in the hopper at the end, and when this residual slurry is present, when the next fresh concrete is put, a part of the fresh concrete has a large amount of water. There is a problem in that the amount of the wetting slurry must be increased to such an extent that the squeeze pump causes an inhalation action as well as separation by the wetting slurry. The amount of this used varies depending on the length of the discharge pipe, but it is usually about 20 to 30 if only the discharge pipe is wetted. However, the conventional squeeze pump required about 50 wetting slurries.

Structure of the Invention (Means for Solving the Problems) In order to solve the above problems, the present invention relates to a suction-side connecting pipe that connects a suction-side end of an elastic tube of a squeeze pump and a suction pipe line, or the above-mentioned elastic An opening for injecting a wetting slurry, which imparts moisture to at least the inner wall surface of the passage of the discharge conduit, into the communication pipe on the discharge side that connects the discharge-side end of the tube and the discharge conduit. Is provided and the opening and closing means is attached to the opening.

(Operation) In the present invention, a wetting slurry such as raw mortar is injected from the connecting pipe into the suction pipe line or the discharge pipe line in a state where the opening / closing means of the opening is opened, and the opening / closing means is closed. Next, when the squeeze pump is started to transfer the fresh concrete or the like, the wetting slurry is transferred to the target location through the discharge pipe line. At this time, prior to the transfer of ready-mixed concrete,
Moisture contained in the wetting slurry is applied to the inner wall surface of the discharge pipe, and the fresh concrete is transferred without being clogged.

(Embodiment) Hereinafter, one embodiment embodying the present invention will be described with reference to FIGS. 1 and 2. In the drawings, reference numeral 1 denotes a cylindrical casing with a lid fixedly mounted on a bogie (not shown). The elastic tube 2 is mounted in a lateral U-shape on the inner peripheral wall surface thereof. A rotating shaft 3 is penetratingly supported in the central portion of the casing 1,
The outer end portion is positively rotated by a motor (not shown) capable of forward and reverse rotations on a carriage (not shown). A mounting member 4 is fixedly mounted on the rotating shaft 3, and brackets 5, 5 support pinching rotors 6, 6 that roll while pinching the elastic tube 2 by brackets 5, 5.
Similarly, guide rollers 8, 8 for holding the elastic tube 2 in a regular position in a circular cross section are rotatably supported by the mounting member 4 via support shafts 7, 7. Further, a plurality of restoration rollers 9, 9 for restoring the elastic tube 2 compressed by the compression rollers 6, 6 are rotatably supported by the support shafts 10, 10 on the mounting member 4.

On the other hand, a communication pipe 11 made of metal is connected to an end of the elastic tube 2 on the suction side, and a rubber suction pipe for guiding fresh concrete into the elastic tube 2 from a hopper (not shown) is connected to the communication pipe 11. Road 12 is connected.

A metal communication pipe 13 is also connected to the discharge side end of the elastic tube 2, and a rubber discharge pipe line 14 is connected to the tip end of the communication pipe 13.

An opening 13a for injecting a wetting slurry 17 such as raw mortar for imparting moisture to the inner wall surface of the elastic tube 2 is formed in an intermediate portion of the discharge side communication pipe 13. A supply cylinder 15 is provided upright in the opening 13a, and a funnel portion 15a is formed at the upper end thereof. A manual opening / closing valve 16 as opening / closing means is interposed in the middle of the supply cylinder 15.

Next, regarding the squeeze pump configured as described above,
The operation will be described.

When using this squeeze pump, first, with the manual on-off valve 16 open, an appropriate amount (about 20 in this embodiment) of a wetting slurry 17 such as raw mortar with a large amount of water prepared in advance is injected. The slurry is introduced from the communication pipe 13 into the discharge pipe line 14. Further, it also enters a part of the elastic tube 2 to adhere moisture to wet the same wall surface. After the pouring of the wetting slurry 17 is completed, the squeeze pump is then driven to transfer the fresh concrete while pressing the elastic tube 2 by the pressing rollers 6 and 6. At this time,
The rotating shaft 3 is reversed in the direction opposite to the arrow in FIG.
It is desirable to spread the wetting slurry 17 over the entire inner wall surface of the. Next, when the squeeze pump is rotated in the normal direction, the wetting slurry 17 having a large amount of water is injected into the discharge conduit 14, so that the fresh slurry is added to the wetting slurry 17 on the inner wall surface of the discharge conduit 14 prior to transfer. The contained water is supplied, and thus the fresh concrete is smoothly pumped.

The present invention can be embodied in the following embodiments.

(1) As shown in FIG. 3, a lid 21 as an opening / closing means is detachably screwed to the supply cylinder 15.

(2) As shown in FIG. 4, a stirring tank is provided at the upper end of the supply cylinder 15.
22, a stirring blade 24 is rotatably mounted in the tank 22 through a rotation shaft 23 by a manual operation handle 25.
The raw mortar should be agitated and generated inside.

(3) As shown in FIG. 5, a motor 26 is provided above the stirring tank 22.
Is installed, and the rotating shaft 23 is rotated by the motor 26.

(4) Although not shown, the inlet side connecting pipe 11 is provided with the above-mentioned means such as the opening 13a, the supply cylinder 15 and the on-off valve 16. In this case, the position of the hopper is raised so that the wetting slurry does not move to the hopper.

EFFECTS OF THE INVENTION As described in detail above, according to the present invention, when the work of the squeeze pump is started, the slurry for wetting is simply supplied to the suction pipe line or the discharge pipe line without operating the squeeze pump, and the raw concrete etc. Moisture can be applied to the inner wall surface of the discharge pipe prior to transfer, thus improving work efficiency and eliminating the wetting slurry from remaining in the hopper, thus reducing the amount of the wetting slurry used. It is possible to reduce the amount of waste and to prevent separation in the hopper due to excess water such as fresh concrete.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing an embodiment of the squeeze pump of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIGS. 3 to 5 show other examples of the present invention. FIG. Casing 1, elastic tube 2, pressure roller 6, suction (discharge) side communication pipe 11 (13), opening 13a, supply cylinder 15, funnel portion 15a, opening / closing valve 16 as opening / closing means, wetting slurry 1
7, a lid 21 as an opening / closing means, a stirring tank 22, stirring blades 24, a manual operation handle 25, a motor 26.

Claims (3)

[Claims] 1. A suction-side connecting pipe for connecting a suction-side end of an elastic tube of a squeeze pump to a suction conduit, or a discharge-side communicating pipe for connecting a discharge-side end of the elastic tube and a discharge conduit. On the other hand, an opening is provided at least on the inner wall surface of the passage of the discharge pipe for injecting a wetting slurry that gives water into the communication pipe, and an opening / closing means is attached to the opening. Squeeze pump. 2. The squeeze pump according to claim 1, wherein a supply cylinder is provided upright in the opening, and an opening / closing valve as an opening / closing means is interposed in the middle of the supply cylinder. 3. The squeeze pump according to claim 2, wherein the supply cylinder has a funnel portion.