JPH0514248U - Stirring device - Google Patents

Abstract

(57) [Summary] [Purpose] A simple and inexpensive stirrer / mixer with a structure that can efficiently perform solidification without variations in strength without securing a large space, reduce equipment costs, and reduce the number of workers. To provide. [Structure] A housing 9 having a predetermined length, and rotating members 11 and 13 arranged in the housing 9 and rotated in the housing 9 by moving soft mud sent under pressure from an inlet 9A toward an outlet 9B. And a stirring blade 15 disposed in the housing 9, connected to the rotating members 11 and 13 and rotated by the rotating member 13, and a portion of the stirring blade 15 near the inflow port 9A. The solidification agent injection part 21 which ejects.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an agitation mixer which mixes a solidifying agent in a step of pumping soft mud soil such as excavated soil with high water content or dredged soil to perform solidification treatment.

[0002]

[Prior Art]

 At construction sites, civil engineering sites, etc., soft mud soil such as high-water content excavated soil and dredged soil is generally pumped as it is to the location remote from the site by a pressure-feeding pipe, and mixed with mixing at a location remote from the site. An apparatus is used to stir and mix with a solidifying agent for solidification.

[0003]

[Problems to be solved by the device]

 However, in such a conventional processing method, the pressure feeding step and the solidification processing step are performed independently of each other, and it is necessary to separately install different devices. Therefore, the facility cost is high, a large space must be secured, and the number of workers increases as the number of workers who manage the pumping process and the solidification process is required. Had a problem that a cycle gap was likely to occur in the pressure feeding process and the solidification treatment process. The present invention has been devised in view of the above circumstances, and an object of the present invention is to secure a large space and to efficiently perform solidification treatment without variations in strength, thereby reducing equipment costs. The purpose of the present invention is to provide a stirring / mixing device with a simple structure and inexpensive structure that can reduce the number of workers and the number of workers.

[0004]

[Means for Solving the Problems]

 To achieve the above object, the present invention provides a housing having a predetermined length, an inlet provided at one longitudinal end of the housing and connected to a pressure-feeding pipe through which soft mud is pressure-fed, and a housing of the housing. An outlet provided at the other end in the longitudinal direction, and a rotating member disposed in the housing and rotated in the housing by the movement of the soft mud sent under pressure from the inlet toward the outlet. , A stirring blade arranged in the housing, connected to the rotating member and rotated by the rotating member, and arranged in a portion of the stirring blade near the inflow port, and ejects a solidifying agent And a solidifying agent injection unit. Further, the present invention is characterized in that the rotating member is disposed on the inlet side in the housing, and the stirring blade is disposed on the outlet side in the housing.

[0005]

【Example】

 A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an overall side view including a pressure feeding pipe and a stirring and mixing device. The raw mud from the work site is pressure-fed to the landfill 5 through the mud pressure pump 1 and the pressure feed pipe 3, and the stirring and mixing device 7 according to the present invention is connected to the downstream end of the pressure feed pipe 3 to feed the raw mud. It also serves as part of the pumping path. FIG. 2 shows a cross-sectional side view of the stirring and mixing device, and the stirring and mixing device 7 includes a cylindrical housing 9 having a predetermined length.

The housing 9 includes a first housing 901 connected to the end of the pressure feed pipe 3 via a flange and a second housing 902 connected to the end of the first housing 901 via a flange. In the embodiment, in the first housing 901, a soft mud soil inflow port 9A is formed in a portion connected to the end of the pressure feeding pipe 3, and the end of the second housing 902 on the side facing the landfill 5 is formed. The outflow port 9B is formed in the.

A shaft 11 is arranged in the first housing 901 along the longitudinal direction thereof. The shaft 11 is held by, for example, a plurality of stays held by the inner wall of the first housing 901. It is rotatably supported in the housing 9 by bearings and the like. As shown in FIG. 3, a plurality of spiral blades 13 are attached around the shaft 11, and the shaft 11 is rotated via the blades 13 by the soft mud moving in the first housing 901. Is configured. Therefore, in this embodiment, the blades 13 and the shaft 11 correspond to the rotating members that rotate by the soft mud that is pumped.

An end of the shaft 11 extends into the second housing 902, and two agitating blades 15 are attached to the extending end 11A as shown in FIG. As shown in, a solidifying agent injection unit 21 is provided. The stirring blade 15 is formed by spirally bending a plate material having a predetermined width with a large inner diameter, which can effectively perform stirring in the second housing 902 and can resist the movement of the raw mud in the pumping direction. It is formed to be as small as possible. The solidifying agent is sprayed from the solidifying agent spraying section 21, and the solidifying agent is sprayed as follows.

First, as shown in FIG. 5, the end portion 11 A of the rotating shaft 11 is provided with a cylindrical body 23 through which the rotating shaft 11 is inserted, and between both ends of the cylindrical body 23 and the rotating shaft 11. An O-ring 25 is provided in each case, a closed space 27 is formed in the cylindrical body 23, and a tube body 29 is provided between the closed space 27 and the outside of the second housing 902. A hole 31 is opened in the rotary shaft portion 11A located in the closed space 27. The hole 31 extends toward the end portion of the rotary shaft 11 and is opened in the outer peripheral surface of the end portion to inject into the opening. The nozzle 33 is attached. As shown in FIG. 1, the solidifying agent is stored in a solidifying agent plant 35 installed at an appropriate location, and is pressure-fed from the solidifying agent plant 35 to the housing 9 side by a pressure-feeding hose 37, so that the pipe 29 and the closed space are closed. It is ejected from the ejection nozzle 33 through the hole 27 and the hole 31. Therefore, in this embodiment, the solidifying agent injection part 21 is formed by the injection nozzle 33, the hole 31, the closed space 27, the tube body 29, and the like.

Since this embodiment is configured as described above, soft mud soil such as excavated soil with high water content and dredged soil is pressure-fed to the landfill 5 side by the pressure-feeding pipe 3, and the final step of this pressure-feeding step is performed. In the stage, it reaches the stirring and mixing device 7. In the stirring and mixing device 7, the raw mud pressure-fed from the pressure feeding pipe 3 first passes through the first housing 901, and the movement of the raw mud causes the shaft 11 to rotate via the blades 13. Then, the stirring blade 15 is rotated by the rotation of the shaft 11, and at the same time, the solidifying agent is injected from the injection nozzle 33 to the raw mud in the second housing 902. Then, the raw mud is pressure-fed to the outlet 9B side while being agitated and mixed with the solidifying agent by the agitating blades 15 in the second housing 902, sufficiently agitated and mixed, and discharged from the outlet 9B to the landfill site 5.

Therefore, according to the present embodiment, since the solidification treatment is performed in the pressure feeding step, no cycle gap is generated, and the stirring blade 15 forcibly stirs and mixes, so that the solidification treatment can be efficiently performed, It is possible to obtain good quality improved soil with no variation in strength. Moreover, since the pressure feeding process and the solidification treatment process are performed in the same process, it is not necessary to separately install separate devices or secure a large space as in the conventional case, and it is possible to reduce the equipment cost and solidify. Both the processing personnel and the pumping personnel can be assigned concurrently, and the number of workers can be reduced. Furthermore, since the stirring blade 15 is rotated by using the kinetic energy of the raw mud that is pumped, the power source for rotating the stirring blade 15 and the power transmission mechanism can be omitted, and the structure is simple. Thus, the inexpensive stirring and mixing device 7 can be obtained.

[0012]

[Effect of the device]

 As is clear from the above description, according to the stirring and mixing apparatus of the present invention, the solidification process is carried out in the step of feeding the raw mud, so that the solidification process does not have a large space and the strength does not vary. It can be done efficiently, and it is possible to reduce the equipment cost and the number of workers. Furthermore, the stirring blades are rotated by using the motion energy of the raw mud that is pumped, so the structure is improved. A simple and inexpensive stirring and mixing device can be obtained.

[Brief description of drawings]

FIG. 1 is an overall side view including a pressure pipe and a stirring and mixing device.

FIG. 2 is a sectional side view of a stirring and mixing device.

FIG. 3 is a sectional front view of a first housing portion.

FIG. 4 is a sectional front view of a second housing portion.

FIG. 5 is a cross-sectional view of a main part of a solidifying agent injection part.

[Explanation of symbols]

 1 Pressure Feed Pump 3 Pressure Feed Pipe 7 Stirring Mixing Device 9 Housing 11 Shaft 13 Blade 15 Stirring Blade 31 Solidifying Agent Injection Section 33 Injection Nozzle

Claims (2)

[Scope of utility model registration request] 1. A housing having a predetermined length, an inflow port provided at one longitudinal end of the housing and connected to a pressure-feeding pipe through which soft mud is pumped, and another longitudinal end of the housing. An outlet provided, a rotating member that is disposed in the housing, and rotates in the housing due to movement of the soft mud that is pressure-fed from the inlet in the direction of the outlet, and disposed in the housing. A stirring blade that is connected to the rotating member and is rotated by the rotating member; and a solidifying agent injection unit that is disposed at a position near the inflow port of the stirring blade and that discharges the solidifying agent. Agitating and mixing device. 2. The stirring / mixing device according to claim 1, wherein the rotating member is arranged on the inlet side of the housing, and the stirring blade is arranged on the outlet side of the housing.