JP4036281B2 - Non-fluid material pumping device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a non-fluidic substance pumping device used for pipe-feeding non-fluidic substances such as dried paper pulp of paper mills, sewage treatment plants or waste disposal plants, etc. .
[0002]
[Prior art]
When transporting non-fluid substances such as dried paper pulp in paper mills, sewage treatment plants or waste treatment plants, etc. by pipe line, dewatered cake generated in concrete and sewage treatment plants In a piston pump used for pressure feeding, a non-flowable substance that is a material to be pumped cannot be pumped because it is not sucked into the pressure feeding cylinder.
[0003]
For this reason, as shown in FIG. 3, the non-fluid material is pumped forward and backward by a pumping cylinder 1 provided with a discharge valve 6 at a discharge port 5, a feed chute 2 for a material to be pumped, and a hydraulic cylinder 4. A non-fluid material pumping device provided with a plunger 3 that reciprocally moves the pumped material and is pushed into the feeding chute 2 and pushed into the pumping cylinder 1.
[0004]
The pumping of the non-flowable substance by the pumping apparatus is performed in a process as shown in FIG.
First, in stroke 1, the feed object M is thrown into the charging chute 2, and in stroke 2, the plunger 3 moves forward, and the feed object M is pushed into the pumping cylinder 1. At this time, the discharge valve 6 is closed.
[0005]
In stroke 3, the discharge valve 6 is opened, and in stroke 4, the plunger 3 further advances in the pressure feed cylinder 1, and the material to be fed M is pressure fed from the discharge port 5.
In stroke 5, after the discharge valve 6 is closed, the plunger 3 moves backward and returns to stroke 1.
[0006]
[Problems to be solved by the invention]
However, in this non-fluid material feeding device, the object to be pumped M is pushed into the pumping cylinder 1 with the discharge valve 6 closed. The filling efficiency is poor.
In addition, when the plunger 3 is retracted after the object to be pumped M is pumped and the discharge valve 6 is closed, the inside of the pumping cylinder 1 is in a negative pressure state, and there is a problem that extra energy is wasted.
[0007]
The present invention solves the above-mentioned problem in the non-fluid material pumping device, and when the object to be pumped is pushed into the pumping cylinder, the air in the pumping cylinder is easily released, and the filling efficiency of the pumping cylinder is improved. In addition, when the plunger moves backward, the inside of the pumping cylinder is in a negative pressure state, so that excess energy is not wasted, and the non-flowable substance can be smoothly pumped in a stable state. An object is to provide a non-flowable substance pumping device.
[0008]
[Means for Solving the Problems]
The present invention includes a pressure feed cylinder provided with a discharge valve at a discharge port, an input chute for a pressure feed object, and a pushing member that reciprocates back and forth and pushes the pressure feed object that is thrown into the charge chute into the pressure feed cylinder. In the non-flowable substance pressure feeding device, a reverse pipe is connected from the tip of the pressure feeding cylinder to the charging chute, and is closed to the reverse pipe when the pressure feed is pumped, and when the pressure feed is pushed into the pressure feed cylinder and pushed in. The above problem is solved by providing a reverse valve that opens when the member is retracted.
[0009]
In this non-fluid material feeding device, the reverse valve of the reverse pipe is opened and the tip of the feeding cylinder and the feeding chute are in communication with each other in the process of pushing the material to be fed put into the feeding chute into the feeding cylinder. Since the pushing member pushes the object to be pumped into the pumping cylinder, the air in the pumping cylinder passes through the reverse pipe to the charging chute side, so that the efficiency of filling the pumping cylinder due to air accumulation is prevented.
[0010]
Also, in the reverse stroke of the pushing member, the reverse valve is opened and the pushing member moves backward with the tip of the pressure feeding cylinder communicating with the closing chute. Is not wasted.
In the pumping stroke of the pumped object, the reverse valve is closed, so that there is no problem in pumping.
[0011]
Accordingly, the non-flowable substance can be smoothly pumped in a stable state.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a configuration diagram of a non-fluid substance pumping apparatus according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram of a stroke of the non-fluid substance pumping apparatus.
Here, the basic configuration of the non-fluid material pumping apparatus is the same as that of the conventional apparatus shown in FIG. 3, and the pumping cylinder 1, the feeding chute 2 for the feed object, and the feeding chute 2 are fed. A plunger 3 that is a pushing member that pushes and feeds the article to be fed M into the pumping cylinder 1 and a hydraulic cylinder 4 that reciprocates the plunger 3 back and forth. A discharge valve 6 is provided at the discharge port 5 at the tip of the pressure feed cylinder 1, and a pipe (not shown) for pipe pressure feed is connected to the discharge port 5.
[0013]
The discharge valve 6 is configured to open when the article to be pumped M is being pumped and to be closed when the pumped article M is pushed into the pumping cylinder 1 and when the plunger 3 is retracted.
A piston can also be used for the pushing member.
In this non-fluid pressure feeding device, a reverse pipe 7 is connected from the tip of the pressure feeding cylinder 1 to the charging chute 2, and a reverse valve 8 is provided on the pressure feeding cylinder 1 side of the reverse pipe 7.
[0014]
The reverse valve 8 is configured to close when the article to be pumped M is being pumped and open when the pumped article M is pushed into the pumping cylinder 1 and when the plunger 3 is retracted.
The pumping of the non-flowable substance by the pumping apparatus is performed in a process as shown in FIG.
First, in stroke 1, the feed object M is thrown into the charging chute 2, and in stroke 2, the plunger 3 moves forward, and the feed object M is pushed into the pumping cylinder 1. At this time, the discharge valve 6 is closed, the reverse valve 8 is opened, and the tip of the pressure feed cylinder 1 and the charging chute 2 are in communication with each other. Pass through to the shooting chute.
[0015]
In stroke 3, when the plunger 3 reaches the inlet of the pressure cylinder 1, the reverse valve 8 is closed, and in stroke 4, the discharge valve 6 is opened. In stroke 5, the plunger 3 moves further inside the pressure cylinder 1. It advances, and the to-be-supplied material M is pumped from the discharge outlet 5.
After the discharge valve 2 is closed in the stroke 6, the reverse valve 8 is opened in the stroke 7, and the plunger 1 moves backward to return to the stroke 1. At this time, since the tip of the pressure feeding cylinder 1 and the charging chute 2 are in communication with each other, the inside of the pressure feeding cylinder 1 is in a negative pressure state, and no extra energy is wasted.
[0016]
In this way, in the process of pushing the object to be fed M that has been thrown into the feeding chute 2 into the pressure feeding cylinder 1, the reverse valve 8 of the reverse pipe 7 is opened, and the tip of the pressure feeding cylinder 1 and the charging chute 2 are in communication with each other. Then, since the plunger 3 pushes the object to be pumped M into the pumping cylinder 1, the air in the pumping cylinder 1 passes through the reverse pipe 7 to the charging chute 2 side, and the filling efficiency of the pumping cylinder 1 is reduced due to air accumulation. Is prevented.
[0017]
Also, in the reverse stroke of the plunger 3, the reverse valve 8 is opened, and the plunger 3 moves backward with the tip of the pressure feeding cylinder 1 and the closing chute 2 communicating with each other, so that the inside of the pressure feeding cylinder 1 is in a negative pressure state. And no extra energy is wasted.
Since the reverse valve 8 is closed in the pumping stroke of the article to be pumped M, there is no problem in pumping.
[0018]
Therefore, the line to be fed M, which is a non-flowable substance, can be smoothly pumped in a stable state.
[0019]
【The invention's effect】
As described above, according to the non-flowable substance pressure feeding device of the present invention, when the object to be pumped is pushed into the pressure feeding cylinder, the air in the pressure feeding cylinder is easily released, and the filling efficiency of the pressure feeding cylinder can be improved. In addition, when the plunger moves backward, the inside of the pressure feeding cylinder is in a negative pressure state, and unnecessary energy is not wasted, and the non-flowable substance can be smoothly pumped in a stable state.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a non-flowable substance pumping apparatus according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram of a stroke of a non-flowable substance pumping device.
FIG. 3 is a configuration diagram of a conventional non-flowable substance pumping device.
FIG. 4 is an explanatory view of a process of a conventional non-fluid material pumping device.
[Explanation of symbols]
1 Pressure Cylinder 2 Input Chute 3 Plunger 4 Hydraulic Cylinder 5 Discharge Port 6 Discharge Valve 7 Reverse Pipe 8 Reverse Valve M Conveyed Material

Claims (1)

Non-flowable equipped with a pressure feed cylinder provided with a discharge valve at the discharge port, a feed chute for the feed object, and a pushing member that reciprocates back and forth and pushes the feed feed material thrown into the feed chute into the pressure feed cylinder. A material pumping device,
A reverse pipe was connected to the charging chute from the tip of the pressure feed cylinder, and a reverse valve was provided on the reverse pipe that was closed when the pressure feed was pumped and opened when the pressure feed was pushed into the pressure feed cylinder and when the push member was retracted. A non-flowable substance pumping device.

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