JPH0523636Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an earth and sand pumping device, and more specifically, an isolation device that collects earth and sand in an earth and sand storage tank and isolates a pressure pipe and the earth and sand storage tank during earth and sand pumping. This invention relates to an earth and sand pumping device in which the earth and sand pumping piston is moved forward in advance to isolate a pumping pipe and an earth and sand storage tank, and then the earth and sand pumping piston is moved forward to push out the earth and sand in the isolation device to the pumping pipe.

[Conventional technology]

Figure 2 shows this type of conventional earth and sand pumping equipment.
Reference numeral 1 designates an earth and sand storage tank, and 2 represents a conveyor that supplies earth and sand S into the earth and sand storage tank 1 from the upper opening of the tank 1. A sediment suction port 1a is provided at the lower part of the sediment storage tank 1, and a pressure feeding pipe 3 is provided at one end in the length direction of the sediment suction port 1a.
are connected and arranged, and a sand pressure pump 4 is installed on the other end side. The earth and sand pressure pump 4
consists of an outer cylinder 5 as an isolation device that isolates the pressure-feeding pipe 3 and the earth and sand storage tank 1, an inner cylinder 6 disposed inside the outer cylinder 5, and an earth-and-sand pumping mechanism attached to the tip of the inner cylinder 6. It is equipped with a piston 7 for use. The outer cylinder 5
is adapted to be able to slide in the axial direction within the casing 8. The inner cylinder 6 and the earth and sand pumping piston 7 are configured to be able to slide in the axial direction within the outer cylinder 5.

In the above-mentioned earth and sand pumping device, when pushing out the earth and sand into the pressing pipe 3, the earth and sand pressing piston 7
The outer cylinder 5 is advanced prior to the forward movement of the outer cylinder 5, and its tip 5a scoops up the earth and sand near the earth and sand suction port 1a in the earth and sand storage tank 1 and takes it into the outer cylinder 5. It is fitted into a fitting member 9 provided at the inlet end to isolate the pressure pipe 3 and the earth and sand storage tank 1. Next, the piston 7 for pumping earth and sand is advanced through the inner cylinder 6, and the earth and sand taken into the outer cylinder 5 is pushed out to the pressure pipe 3. When extrusion of the earth and sand is completed, the outer cylinder 5 is moved back, and then the earth and sand pumping piston 7 is moved back, and the above-described operation is repeated again. Incidentally, reference numeral 10 in the figure stores lubricating oil 11 for lubricating the sliding surfaces of the outer and inner cylinders 5 and 6. Oil tank shown.

[Problem that the invention attempts to solve]

In the conventional technology described above, since the earth and sand storage tank 1 is of an open type, there is a problem that when the amount of earth and sand supplied is larger than the amount of pumped and discharged earth and sand, the earth and sand overflows from the earth and sand storage tank 1 and pollutes the surrounding area. . Further, since the earth and sand storage tank 1 is of an open type, there is a problem that earth and sand containing flammable and harmful substances such as methane cannot be pumped.

The purpose of this invention is to prevent the overflow of earth and sand from the earth and sand storage tank, to balance the amount of earth and sand supplied and the amount of pumped discharge, and to make it possible to forcefully transport earth and sand containing flammable and harmful substances such as methane. The objective is to provide an earth and sand pumping device that can

[Means for solving problems]

The above object is to configure the earth and sand storage tank as a sealed tank, supply earth and sand to the tank via an earth and sand supply pipe, and provide an earth pressure gauge to detect the earth pressure in the earth and sand storage tank. This is achieved by controlling the amount of earth and sand supplied or pumped and discharged according to the detected value of the soil pressure gauge.

[Effect]

Even if the amount of earth and sand supplied to the earth and sand storage tank exceeds the amount that is pumped and discharged, the earth and sand storage tank is of a sealed type, so that overflow of earth and sand is prevented. In addition, the earth pressure inside the earth and sand storage tank was detected using an earth pressure meter.
Since the amount of earth and sand supplied or the amount of pumped discharge is controlled according to the detected value, the amount of earth and sand supplied and the amount of pumped and discharged can be easily balanced. In addition, the sediment storage tank is a sealed type, so flammable substances such as methane, etc.
Sediment containing harmful substances is forced to be pumped.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

The figure shows a sectional view of the earth and sand pumping device according to the present invention, and the same reference numerals as in FIG. 2 represent the same or equivalent parts. In this earth and sand pumping device, the earth and sand storage tank 21 is constituted by a sealed tank, and earth and sand are supplied to the tank 21 via an earth and sand supply pipe 22. It is equipped with an earth pressure gauge 23 that detects pressure, and the amount of earth and sand supplied or the amount of pumped and discharged is controlled according to the detected value of the earth pressure gauge 23.

Next, the operation of this embodiment will be explained.

If the amount of earth and sand supplied to the earth and sand storage tank 21 exceeds the amount of earth and sand pumped and discharged by the pressure pump 4, the earth and sand will not overflow and contaminate the surrounding area because the earth and sand storage tank 21 is configured as a sealed tank. Prevented. Further, when a difference occurs between the amount of earth and sand supplied and the amount of pumped and discharged, the earth pressure within the earth and sand storage tank 21 fluctuates. In other words, when the amount of earth and sand supplied exceeds the amount of pumped discharge, the earth pressure increases, and conversely, when the amount of earth and sand supplied becomes less than the amount of pumped and discharged, the earth pressure decreases, but this earth pressure is detected by the earth pressure meter 23, According to the detected value, the amount of earth and sand supplied or the amount of pumped and discharged soil is controlled to keep the fluctuating earth pressure within a certain range. Specifically, the earth and sand is pumped and discharged intermittently by the earth and sand pump after being separated in the outer cylinder by the pumping piston. Therefore,
The pressure inside the sediment tank is constantly changing. That is, when the outer cylinder is isolated and sealed, the internal pressure of the earth and sand reservoir tank increases due to the supply of earth and sand, and when the outer cylinder retreats, a space is created, so that the internal pressure of the earth and sand reservoir tank decreases. This kind of pressure rises and falls repeatedly within one stroke of the earth and sand pump, but
When the amount of supplied earth and sand matches the amount of pumped earth and sand, the internal pressure of the earth and sand storage tank fluctuates between the above values, but the range of fluctuation is constant, and its upper and lower limits are also constant.

The operator should monitor the internal pressure of the sediment storage tank, and if the upper limit value gradually increases, adjust the flow control valve built into the hydraulic circuit or the tilt of the hydraulic pump to maintain the amount of oil required to operate the sediment pump. The turning angle is changed to increase the amount of oil and the number of times the sediment pump pumps is increased to control the sediment tank pressure so that the upper limit value falls within the strength range of the sediment tank. If the upper limit of the sediment tank pressure is gradually decreasing, adjust the oil amount to reduce the number of times of pumping so that the upper limit of the sediment tank pressure remains constant. Furthermore, if the earth and sand supply side can control the supply amount using a screw conveyor or the like, the above can be achieved by increasing or decreasing the supply amount on the earth and sand supply side.

In addition, if it is troublesome for the operator to pay attention to the sediment tank pressure, the earth supply and pressure feeding can be stopped (stopping the operating hydraulic pump) when the sediment tank pressure upper limit value approaches the sediment tank strength. You may let them.

The sediment tank pressure is a guide for the balance between the actual supply amount and pumping amount (amount considered including supply efficiency and pumping efficiency, not a theoretical value), so use the detected value as a guide to pumping amount and supply amount. By increasing or decreasing
The amount of soil supplied and the amount of pumped discharge are balanced. In addition, flammable and harmful substances such as methane,
If air is included, these gases are discharged from the pressure pipe 3 together with the earth and sand in a form that is surrounded by earth and sand.

[Effect of idea]

As explained above, according to the present invention, it is possible to prevent the overflow of earth and sand from the earth and sand storage tank, and it is possible to easily balance the amount of earth and sand supplied and the amount of pumped discharge, and also to prevent combustible and harmful substances such as methane. It is possible to pump the soil containing soil.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing the earth and sand pumping device of the present invention;
FIG. 2 is a sectional view showing a conventional device. 3...Pressure pipe, 4...Sediment pressure transfer pump, 5
... Outer cylinder (isolation device), 7 ... Piston for pumping earth and sand, 21 ... Earth and sand storage tank, 22 ...
Earth and sand supply pipe, 23...Earth pressure gauge.

Claims (1)

[Scope of utility model registration request] Connect the pressure pipe to one side of the sediment storage tank,
On the other hand, a cylindrical isolation device that isolates the pressure-feeding pipe and the earth and sand storage tank is provided so as to be slidable in the axial direction, and within the isolation device, the piston for pumping the soil is slidable in the axial direction concentrically with the isolation device. provided, the isolation device is moved forward in advance of the dirt pumping piston during earth and sand pumping, and after isolating the pumping pipe and the earth and sand storage tank, the earth and sand pumping piston is advanced to push the earth and sand in the isolation device to the pumping pipe, In the earth and sand pumping device configured to move back the separator and the earth and sand pumping piston after extruding the earth and sand, the earth and sand storage tank is constituted by a sealed tank, and the earth and sand are supplied to the tank via an earth and sand supply pipe. In addition, an earth pressure meter is provided to detect the earth pressure in the earth and sand storage tank, and the amount of earth supplied or the amount of earth pumped and discharged is controlled according to the detected value of the earth pressure meter. Device.