JP2783936B2 - Pump pump equipment used for construction work - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure pump device, and more particularly to a pressure pump device for transferring muddy water in civil engineering construction work.

[0002]

2. Description of the Related Art An example of a conventional pressure pump device will be described with reference to FIG. The figure shows the equipment configuration for tunnel excavation work using the muddy water shield method. Reference numeral 1 denotes a muddy water treatment plant, 2 denotes a shield machine, and 3 denotes a central monitoring panel. The muddy water generated in the muddy water treatment plant 1 is pumped through a mud pipe 5 by a variable speed mud pump 4 and supplied into a shield chamber in front of a partition 6 of the shield machine 2. A water flow meter 7 and a water density meter 8 are attached to the mud pipe 5, and the respective data are fed back to the central monitoring panel 3.

The muddy water in the shield chamber is returned to the muddy water treatment plant 1 through a drainage pipe 11 by means of a variable speed type sludge pump 9 and constant speed type pumps 10 connected in series at appropriate intervals according to the discharge capacity. I do. The drainage pipe 11 is provided with a drainage density meter 12 and a drainage flowmeter 13. The change of the flow rate and the pressure of the muddy water is controlled by changing the rotation speeds of the variable speed type mud pump 4 and the variable speed mud pump 9 by the central control panel 3.

[0004]

The pump and the pipeline of the pressure pumping apparatus may be blocked by foreign matter in the fluid, causing an abnormal transfer function. For example, in the case of the muddy water shield method, when a certain amount or more of boulders, driftwood, metal materials, etc. mixed in muddy water and excavated earth and sand are taken into the pumping pump device, these foreign substances are removed between the pump blades. Or clogging of the pipeline, the sludge flow rate may decrease, or sludge may not be discharged at all. In such a case, it becomes difficult to control the internal pressure of the face during excavation, which hinders the execution of the work. Therefore, it is necessary to disassemble the pump and the drainage pipe to remove the clogged foreign matter.

However, conventionally, it is necessary to empirically judge the occurrence of the clogging phenomenon from the measured values of the number of revolutions and the flow rate of the pump, and to determine whether the clogging is temporary or requires removal of foreign matter. Recognition is difficult, and it is also difficult to specify the occlusion site, which requires a long time to release the occlusion, which significantly reduces the work efficiency. Therefore, when a flow situation and a blockage phenomenon in the pumping pump device occur, there is a technical problem to be solved in order to be able to easily determine the blockage portion and to prevent a decrease in work efficiency. .
An object of the present invention is to solve the above-described problem.

[0006]

SUMMARY OF THE INVENTION The present invention proposes to achieve the above-mentioned object. A vibrometer is provided in one or both of a pump and a pipe constituting a pumping pump device, and An object of the present invention is to provide a pumping pump device used for construction work in which the occurrence of a blockage phenomenon in a pumping pump device and a blockage point can be determined from a measured value.

[0007]

The vibration state of the pump or the like is recognized by the vibration meter provided on the pump or the pipeline. If the acceleration, amplitude, and the like of vibration during normal operation are grasped in advance, the occurrence of blockage can be detected from a change in vibration, and the blockage location can be specified from the installation location of the vibrometer. In addition, if the vibration at the time of partial blockage or complete blockage is grasped by experiments or construction results, the degree of blockage can be grasped.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG. For convenience of explanation, technical matters belonging to the related art will be described at the same time. Mud water treatment plant 21 shown in FIG.
The shield chamber shielded by the partition wall 23 of the shield machine 22 is connected by a mud feeding pipe 24 and a mud discharging pipe 25. A variable speed type mud pump P
₁ , a water flow meter 26 and a water density meter 27 are inserted, and a pressure detector 28 for detecting the water pressure of the face is provided near the shield machine 22.

A variable speed type sludge pump P ₂ , a constant speed type pump P ₃ ,.
_n , a wastewater density meter 29 and a wastewater flow meter 30 are provided.
Flow meters 26, 30, density meters 27, 29 and pressure detector 2
The detected value of 8 is input to the central monitoring panel 31. Central monitor board 31 control panel C ₁ of each of the pumps P ₁ to P _n on the basis of the set value and the inputted detection values -C _n and automatic valves 32 and 33, controls the automatic bypass valve 34.

[0010] The pump P _2, P _3, ... and rotation bearing of P _n, established the vibrometer 35 ... in any point of the Haidorokan 25 connects its output to the central monitoring panel 3 1 , The degree of vibration on the ground can be monitored. The vibrometers 35 and 3
Here, a speedometer or an accelerometer is used as 5. Then, each vibrometer 3 in a normal sludge state
The detection values of 5, 35 ... are grasped in advance so that the degree of blockage can be determined based on the vibration speed or vibration acceleration.

When a mud feed command is output from the central monitoring panel 31, an automatic mud feed valve 32 and an automatic mud discharge valve 3 are output.
3 is opened, the variable speed type sludge pump P ₁ , the variable speed type sludge pump P _2, and the constant speed type pumps P ₃ ,... _Pn are started, and are put into the shield chamber closed by the partition 23 of the shield machine 22. The muddy water is injected, and at the same time, the muddy water is returned to the muddy water treatment plant 21.

[0012] central monitor board 31 controls the Okudoro amount of the variable speed type Okudoro pump P ₁ and variable speed type waste sludge waste sludge of the pump P ₂ to control the pressure of working face constant. With the excavation of the shield machine 22, foreign matter boulders or the like muddy water discharged from the variable speed type Hydraulic pumps P ₂ is mixed, foreign matter clogged in the gap between the vanes of the pump P ₂ to P _n of Haidorokan 25 As a result, the rotational balance of the impeller is deviated, and the discharge flow rate becomes uneven, causing abnormal vibration in the pump, and the speed and acceleration of the vibration increase.

Also, when foreign matter is clogged in the exhaust pipe 25, the speed and acceleration of vibration change. When the blockage is completely obstructed, the flow of the muddy water is stopped, so that the vibration is reduced as compared with the normal state, and the speed and acceleration of the vibration may be reduced.
These vibration changes can be recognized by the central monitoring panel 31, and the location where the blockage has occurred can be specified from the installation location of the vibrometers 35, 35. Furthermore, after the rotational speed of the variable speed type Hydraulic pumps P ₂ by the automatic control is increased, the vibrometer 3
When the detected values of 5, 35... Return to the normal values, it is understood that the blocked foreign matter has been removed by the flow. When the foreign matter is not removed or is completely blocked, the feeding / discharging is stopped, and the obstructed location is disassembled to remove the foreign matter.

The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to those modifications.

[0015]

According to the present invention, as described in detail in the above-described embodiment, it is possible to ascertain a blockage position and a degree of blockage of the pressure pumping device. Therefore, when the blockage occurs, it is possible to take an appropriate countermeasure without relying on experience or intuition, and it is possible to eliminate the risk of wasting labor and time, thereby contributing to preventing a reduction in work efficiency.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a pump pressure feeding device of the present invention.

FIG. 2 is a configuration diagram of a conventional pump pressure feeding device.

[Description of Signs] 21 Mud water treatment plant 22 Shield machine 24 Mud feed pipe 25 Mud drain pipe 31 Central monitoring panel 35 Vibration meter

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yukiho Iizawa 3-21 Kanda Sakumacho, Chiyoda-ku, Tokyo Toyo Kogyo Co., Ltd. (72) Inventor Hiroshi Nishino 3-21 Kanda Sakumacho, Chiyoda-ku, Tokyo Toyo Kogyo Incorporated (58) Field surveyed (Int.Cl. ⁶ , DB name) E21D 9/06 301

Claims (1)

(57) [Claims] 1. A vibrometer is provided on one or both of a pump and a pipeline constituting a pumping pump device, and the occurrence of a clogging phenomenon and a clogged portion in the pumping pump device can be determined based on a measured value of the vibrometer. Pumping pump device used for construction work.