JPS6153470A - Pressure-feeding booster pump for concrete and soft earth and sand - Google Patents

Abstract

PURPOSE:To make a fluid feedable with pressure at a distance continuously without making it flow back, by letting at least two pistons having a pinch valve each to be opened or closed by a driving source such as air pressure or the like, reciprocate inside a cylinder with a driving mechanism. CONSTITUTION:At the time of pressure feed for a fluid, first a piston 2a of a thrust part A is moved to the right by a hydraulic jack 3a after making its pinch valve 6a come into a state of being closed, while a piston 2b of a push part B is moved to the left for restoration by a hydraulic jack 3b after making its pinch valve 6b comes into a state of being opened. With this operation, the fluid is made to be fed to the right with pressure. When each of these pistons 2a and 2b reaches a travel limit position, the piston 2b is moved to the right after making the pinch valve 6b comes into a state of being closed, while the piston 2a is moved to the left after making the pinch valve 6a come into a state of being opened, and the fluid is continuously fed with pressure, and simultaneously the fluid is drawn in by suction form the left to space between both these pistons 2a and 2b, then the same operations is made into repetition afterward.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a booster pump lc used for pumping concrete, soft earth, and the like.

(Prior art) Generally, when placing concrete in construction or civil engineering work, a concrete pressure pump is used to pump the concrete to the placement site. When the concrete has to be pumped over a longer distance, or when the concrete is placed in a high place, the capacity of the concrete pump may be reduced due to an increase in the resistance of the pumping piping or an increase in the actual lifting height. There may be a shortage of water and it may not be possible to pump it to the pouring site.

In such cases, there is no suitable booster pump that can compensate for the lack of capacity of the pressure pump, so the pressure pump must be replaced with a higher-lift one, or a secondary pump that relays the pressure flow may be used. Generally, a separate pressure pump is installed to pump the concrete to the final pouring site.

For example, in the shield method, the above-mentioned
The same applies to cases where soft soil is discharged to the outside using a full pressure pump.

(Problem to be solved by the invention) However, the above-mentioned pumps for pumping concrete and soft soil are generally large and heavy, so when installing these pumps, it is difficult to install and dismantle the pumps. b Sufficient space is required, including a work space. For this reason, when working on small-scale buildings or using small-diameter shields, as mentioned above, there may not be enough space to replace the pump with a higher head (and therefore larger), or a secondary pressure pump for relaying may not be available. It may be difficult to secure space for installation.

In addition, these pumps are complex and expensive equipment, including attached FA equipment, and especially in large-scale construction projects, it is necessary to replace the pressure pump with one that has significantly higher pumping speed, or to install multiple stages of relay pumps. Because it has to be done, it costs a lot of money.

Furthermore, if the relay pressure pump must be installed at a high place, the pump is large and heavy as mentioned above, making it difficult to handle and display, and installation and disassembly work is time-consuming. There are problems that come with risks.

The present invention has been made in view of these circumstances, and is small in size and easy to handle, and can be installed in the middle of the pressure feed piping to compensate for the lack of head height of the pressure pump. The purpose is to provide a high-performance and inexpensive booster pump.

(Elaborative Means for Solving the Problems) The present invention provides a system in which at least two pistons each having a pinch valve that is opened and closed by a driving source such as air pressure are reciprocated within a ring by a Us mechanism such as a hydraulic jack. It consists of:

(Function) The booster pump according to the present invention is installed in the middle of the pressure-feeding piping near the pressure-feeding limit distance of the pressure-feeding pump, and operates as follows.

At least two pistons disposed within the cylinder are reciprocated within the cylinder by their respective drive mechanisms to pump a portion of a fluid such as concrete or soft earth and sand. That is,
When the pinch valve provided on the piston is in the closed state due to its driving source, the piston moves in the pumping direction to perform the pumping operation, and after the pumping operation is completed, the pinch valve is in the open state. The piston moves in the opposite direction and returns to its original position. Also, each piston performs an operation opposite to the other. That is, when one piston performs a pressure feeding operation, the other piston performs a return operation.

As a result, the booster pump of the present invention continuously re-pressures the fluid sent by the pressure pump without causing the fluid to flow back further into the distance.

(Example) An example of the present invention will be described with reference to FIGS. 1 and 2.

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention,
In the figure, A and B are the main components of this booster pump, namely a pushing part and an extruding part.

Since the push-in section A and the push-out section B have exactly the same configuration, the push-in section A will be explained in detail. (In addition, the elements with the suffix a in the figure are elements that constitute the pushing part A, and the ones with the suffix b are elements that constitute the pushing part B.) The pushing part A consists of a pair of cylinders la, la and piston 2
a, and a □hydraulic jack 3a.

The cylinders la and la are attached to one end of a pipe whose diameter is slightly larger than that of the pressure pipe to which this booster pump is attached.
Flanges 4a, 4a are formed. The other ends of the cylinders la, la where the 7 flanges 4a, 4a are not formed are spaced apart and face each other, and the flanges 4a,
They are connected by rod-shaped slide guides 5a, 5a that pass through holes provided in 4a.

Between the above connected fL cylinders la and la,
The piston za consisting of a pinch valve 6a and a slide portion 7aj7a is provided. The pinch valve 6a includes a short tubular member 8a and a flange member 10a attached to flanges 9a formed at both ends of the short tubular member 8a.
, loa, and valve bodies 11a, 11a made of an elastic material such as rubber. Here, the valve bodies 11a, lla are placed inside the short tubular member 8a, and their ends are connected to the flanges 9a, 9a and the flange member 1.
It is sandwiched between 0a and 10a. Valve body 11
a and lla are air source devices (not shown) (pinch valve 6
The pinch valve 6a is inflated by compressed air sent by the air pipe 12a from the drive source 6a, and the valve bodies 11a and 11a come into contact with each other to close the inside of the pinch valve 6a. The flange member 10a and loa of the pinch pallet 7'6a include
Slide parts 7a, 7a are attached. The slides Vf57a, 7a have an outer diameter equal to that of the cylinder la.

7 langes 13aj1 at one end of the tube approximately equal to the inner diameter of 1a.
3a is formed, and these flanges 13a, 1
3a by said pinch valve 6 & 7 flange member 10
The sliding part 2a constructed as described above is slidably inserted into the cylinders la, la, and the cylinder la is attached to the cylinder la.

1a are arranged so as to be movable between them. Here, the slide guides 5a, 5a connecting the cylinders la, la are connected to the seven flange 9a, 9 of the pinch valve 6a
a, flange member 10a.

10a1 and slide part 7a, flange 13a of 'Ih
, 13aK are inserted through the holes provided as described above.

In addition, on the inner periphery of the end of the cylinders la and la and the outer periphery of the end of the slide parts 7a and 7a, there are gaskets 14cL, respectively.
, 14a, 15a, and 15a are provided.

Further, the piston 2a is connected to the piston rod 1saVca of the hydraulic jack 3a (one driver of the piston 2a), which is composed of a hydraulic cylinder 16a, a piston 17a1, and a piston rod 18a, via a connecting member 19a.

The configuration of the push-in part Al7) has been described above, but the push-out part B is exactly the same as the push-in part A (i.e., 7 cylinders lb, lb, piston 2b).

Since the hydraulic jack 3b is configured as shown in FIG.

The push-in part A and the push-out part B are connected by flanges 4a and 4b at their opposite ends to constitute this booster pump.

As a result, in this booster pump, the insides of the cylinders la, la of the pushing part A, the cylinders 1b, 1b of the piston 2a and the pushing part B, and the piston Ztl are f'
The L axis is the same, it becomes one pressure passage, and the piston 2
a and 2b are connected to cylinder l by hydraulic jacks 3a and 3b.
a, la and 1b.

While reciprocating between 1b and 1b, piston 2
In conjunction with the movement of a, 2b, pinch valves 6a, 6b,
By opening and closing the pressure passages, fluids such as concrete and soft earth and sand are pumped.

Next, the usage and operation of the booster pump configured as described above will be explained.

The booster pump has seven flange 4a, 4b at the n end, with the pushing part A as the side from which the fluid is forced to be fed, and the pushing part B as the side from which the fluid is forced to be fed, in the middle of the pressure feeding piping 20.20.
is connected via the V-juicer 21.21. Here, the booster pump is installed (
In other words, the distance from the pressure pump may be close to the pressure pump's limit distance, but it should be within a range where the pressure pump can at least feed fluid into the pushing part A of the booster pump.

Next, the operation of the booster pump will be explained with reference to FIG. (The thick arrow in the figure indicates the direction of pressure feeding, and the thin arrow indicates the direction of movement of the piston.) First, FIG. 2(A) shows a state in which the piston 2a of the pushing part A has started the pressure feeding operation. That is, the pinch valve 6a of the piston 2a is
1 and moves in the pumping direction, and pumps the fluid being pumped by the pressure pump to the pushing part A as described above. At this time, the piston 2b of the extrusion part B
With b open, the return operation in the opposite direction to the pumping direction is started. As it is, as shown in FIG. 2(b), the piston 2a performs the pressure feeding operation, and the piston 21) performs the return operation,
As shown in Figure 2 (/9), each piston 2II
When L and 2b reach their movement limit positions, their operations end. , ii and FIG. 2) show the state in which the piston 2b of the extrusion section B has started the pumping operation. That is, the pinch pulp 6b of the piston 2b is closed, and the fluid that has been pumped and concentrated by the piston 2a as described above is further pushed out in the pumping direction. At this time, the piston 2a of the pushing part A starts a return operation in the opposite direction to the pumping direction with the pinch pulp 6a open. As shown in FIG. 2 (4), the piston 2b continues the pressure feeding operation and the piston 2a continues the return operation, and as shown in FIG. 2 (c), each piston 2a, 2b reaches its movement limit position. Then, those operations are completed. Subsequently, these pistons 2a,
2b returns to the state shown in FIG. 2(A) again, and by repeating the above operations, the fluid is continuously pumped.

In this way, in this booster pump, one of the two pistons is always performing the pumping operation.
Fluid can be pumped continuously without backflow.

The above is a detailed description of one embodiment of the present invention.
However, the present invention is not limited to the above embodiments,
Various applications are possible. For example, if a Booth p-pump is required to have a high head, this can be achieved by increasing the number of pistons. Furthermore, in this embodiment, the binding box in which the pistons are driven by separate hydraulic jacks may be linked to each other by a single drive source, link mechanism, or the like. Note that the driving source for the piston is not limited to hydraulic pressure, and the driving source for the pinch pulp is, of course, not limited to pneumatic pressure.

Further, in this embodiment, the push-in part and the push-out part are connected to form a nine-way structure, but they may also be integrated from the beginning.

(Effects of the Invention) As described above, the booster pump according to the present invention can be installed in the middle of a pressure-feeding pipe, and is a smaller, lighter, and simpler device than a pressure-feeding pump, so it does not require much installation space. It has the advantage of being easy to handle and inexpensive.

[Brief explanation of the drawing]

The Maki construction diagram and FIG. 2 are diagrams showing one embodiment of the present invention. FIG. 1 is a front sectional view schematically showing the groove bottom of an embodiment of the present invention. FIG. 2 is a schematic diagram explaining the operation of the above embodiment. ” 72a f
): The state in which the pressure feeding operation has started and the piston 2b has started the return RD operation, (B) is the state in which the piston 2a is in the pressure feeding operation and the piston 2b is in the return operation, and e″l is the state in which the piston 2a is in the pressure feeding operation. 2) is the state in which the piston 2a has started the return operation and the piston 2b has started the pressure feeding operation and is in good condition, (E) is the state in which the piston 2a has finished the return operation.
(f) shows a state in which the piston 2b is in the middle of a return operation and the piston 2b is in a pressure-feeding operation. 1... cylinder, 2... old... piston, 3...
・Hydraulic jack (piston drive groove), 6...
... Pinch pulp. Figure 2 Procedural Amendment (Voluntary) February 20, 1985 Patent Application No. 172604 of 1988 2 Title of Invention Booster Pump for Pressure Delivery of Concrete, Soft Earth, etc. 3
, person who makes corrections

Claims (1)

[Claims] A cylinder forming a pressure feeding passage, at least two pistons disposed within the cylinder so as to be movable within the cylinder and on the same axis as the cylinder, and a piston provided in the piston and driven by a driving source such as air pressure. A booster pump for pressurizing concrete, soft earth, etc., comprising a pinch valve that opens and closes a pressurizing passage, and a drive mechanism that reciprocates the piston within the cylinder.