JPH0537040Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cleaning device for pump equipment that takes in water containing foreign matter such as earth and sand, sludge, and other solid matter.

[Prior art] When using such equipment to take water from rivers, lakes, or oceans, or when taking in sewage or wastewater, or when taking used process cleaning water returned to a water receiving tank and reusing it, Sediment contained in
Foreign matter such as sludge and other solids may accumulate on the bottom of the suction tank and adversely affect the suction of the pump.

Generally, if the pump is running continuously,
Known protection devices will not be activated and will not be adversely affected by foreign objects. However, if the pump is stopped for a long period of time, there is a risk that foreign matter carried by natural flow or flows generated by other equipment may accumulate near the water intake port of the pump, causing the water intake port to become clogged. Furthermore, if the load is suddenly increased when the machine is continuously operating at a low load, foreign matter accumulated near the water intake port may be sucked in momentarily, causing trouble.

Conventionally, in order to solve this problem, so-called settling ponds have been developed, in which the cross-sectional area of a part of the flow path from the river water intake or sewage receiving tank to the pump intake port is increased and the flow velocity is lowered to intentionally allow foreign matter to settle. was installed to prevent foreign matter from accumulating near the pump suction port. However, since settling ponds require a large site area,
It cannot be installed if there is not enough land.

In addition, depending on the accumulation of foreign matter, the pump is stopped, the suction tank is partitioned off with a corner cutter or a gate, and the pump is stopped.
The water in the suction tank was pumped out using a wastewater pump, and foreign matter that had accumulated was removed manually. According to this method, the suction tank can be completely cleaned, but it requires partition equipment such as a gate, takes a long time, and costs a lot for cleaning.

Alternatively, deposited foreign matter has been cleaned using high-pressure water, but cleaning has to be done visually, and the cleaning effect is low.

JP-A-49-7801 discloses a technique in which the sediment in the sediment layer is stirred by a jet stream from a nozzle and then sucked up by a side pump. However, in such known techniques, the distance between the nozzle and the pump suction port is relatively long, and therefore, the jet stream from the nozzle spreads, and it is not always possible to sufficiently clean accumulated foreign matter.

Further, the technique described in Japanese Patent Application Laid-Open No. 52-6102 requires the use of a bit tapered at the bottom, and cannot be applied to a general water intake section.

[Problems to be Solved] Therefore, an object of the present invention is to provide a cleaning device for pump equipment that can be applied to a general water intake section and can efficiently clean foreign matter with a jet stream from a nozzle.

[Means for Solving the Problems] According to the present invention, in pump equipment that takes in water containing foreign substances such as earth and sand, sludge, and other solid matter, a suction tank or a river in which a pump water inlet or a suction pipe water inlet is placed; A nozzle for spouting water discharged from the pump of the pump equipment or another pump along the bottom surface is provided near the pump water intake port or suction pipe water intake port provided near the bottom surface of the water intake part of the lake, ocean, etc. A large number of partition plates are provided in the vertical direction to prevent the water ejected from the nozzle from spreading.

[Description of effects] Therefore, the water discharged from the pump equipment or another pump is ejected from the nozzle along the bottom of the water part, and the foreign matter accumulated near the water intake port of the pump is moved, so the water intake area is effectively Can be cleaned properly.

Since a large number of partition plates are provided in the vertical direction, the water suction operation of the pump is not hindered in any way.
In the space formed by the partition plates, a vortex is generated by the nozzle jet and the water suction flow to the water intake port, so the vortex separates the upper and lower parts of the partition plate. . Therefore, the jet stream from the nozzle does not spread. Therefore, the cleaning effect is improved and labor can be saved. In this way, according to the present invention,
By combining the nozzle with a partition plate, the purpose can be achieved with a compact structure, and there is no need for conventional large equipment such as a settling basin or dedicated equipment such as a gate.

[Preferred Embodiment] When implementing the present invention, the suction water tank may be partitioned into upper and lower parts by opening and closing the partition plate.

When the present invention is put into practice, for example, in a pump equipment provided with a suction water tank, it is preferable that the bottom surface of the suction water tank is formed into an inclined surface so as to be lowered toward the direction in which water is ejected from the nozzle. In this way,
The cleaning effect can be improved by facilitating the movement of deposited foreign matter by the nozzle jet.

When carrying out the present invention, it is preferable that the velocity distribution of the nozzle jet stream be increased closer to the bottom of the suction water tank. In this way, the effect of moving and removing deposited foreign matter can be improved.

When implementing this invention, if the suction tank faces a flow path such as a river and has a deep depth, a discharge pit is installed at the back of the suction tank to collect foreign matter into the pit, and the collected foreign matter is scraped up. It is preferable to return the sludge to the flow path using a device, sludge pump, etc. In this way, the returned foreign matter can be removed by the flow of the channel.

When implementing the present invention, when water from a river or the like is used as cooling water for the heat exchanger, it is preferable to connect a branch pipe branched from the middle of the discharge pipe to the nozzle via a gate valve. In this way, if necessary, the gate valve can be opened and discharged water can be ejected for cleaning, thereby eliminating unnecessary power.

When implementing the present invention, it is preferable to control the jetting from the nozzle using a timer depending on the rate of accumulation of foreign matter. In this way, the cleaning work can be automated.

[Examples] Examples of the present invention will be described below with reference to the drawings. In FIG. 1, a water suction port 1 with a downward opening is provided near a bottom surface A1 of a suction water tank A.
The water intake port 1 is connected to the suction side of the pump P by a suction pipe 2, and the discharge side of the pump P is connected to the water receiving tank B by the discharge pipe 3 via a check valve 4 and a discharge valve 5.

On the other hand, a return pipe 6 is branched from between the check valve 4 and the discharge valve 5 of the discharge pipe 3. This return pipe 6 is connected to a nozzle N via a gate valve 7 and a pressure regulating valve 8. The nozzle N is the water intake port 1
It is installed near the bottom right of the water inlet 1 in the illustrated example, and jets water along the bottom surface A1, and the foreign matter C deposited on the bottom surface A1 near the water inlet 1 by the jet stream J.
The pump P is oriented in a direction suitable for moving the foreign matter to a position where it does not adversely affect the operation of the pump P. Therefore, it is preferable that the bottom surface A1 is formed into an inclined surface so as to become lower in the direction in which the jet J flows, ie, toward the left in the illustrated example.

Further, between the water inlet 1 and the bottom surface A1, a large number of vertical partition plates 14 and one partition plate 17 are provided at positions close to the bottom surface A1. This partition plate 14 has a bottom surface A1 and a depth A4 of the suction water tank A.
The partition plate 17 is fixed to a large number of rotating shafts 15 provided in parallel to the rotating shafts 15, and the rotating shafts 15 can be rotated 90 degrees by an opening/closing means (not shown).
It is provided on the plane formed by 5. In this embodiment, during normal operation, the partition plate 14 is open (the first
), the settled foreign matter C is deposited on the bottom surface A1. During cleaning, the partition plate 14 is closed (Fig. 2), and the suction water tank A is divided into an upper part and a lower part by the plate-like body 16 and the partition plate 17 formed by the continuous partition plate 14, and the jet flow J is diffused. can be prevented and the cleaning effect can be improved.

FIG. 3 shows another embodiment of the partition plate of FIG. Between the bottom surface A1 of the suction water tank A and the water intake port 1, a large number of partition plates 18 facing in the vertical direction are provided at positions close to the bottom surface A1. The partition plates 18 are each parallel to the rear surface A4, and are fixed to the bottom surface A1 by means not shown so that their lower ends are parallel to the bottom surface A1. The ratio h/p between the height h and the pitch p of the partition plate 18 is such that a vortex V is created in the space S between the partition plates by the jet flow J from the nozzle N and the suction flow K to the water intake port 1. It is set to a value that causes it to occur. In this embodiment, the suction water tank A is divided into an upper part and a lower part by the vortex V, and substantially the same effect as in the embodiment shown in FIG. 1 can be obtained without opening and closing the partition plate 18. The cost can be reduced by eliminating the need for an opening/closing means for the partition plate 14.

The opening shape of the nozzle N may be the same as the opening at the end of the return pipe 6, but in order to adjust the velocity distribution of the jet flow J, it is preferably formed into a well-known constricted shape, a bulge shape, a fan shape, or the like.

In the case of a pump in which the impeller and discharge ball are submerged in water, there is no equivalent to the suction pipe 2, but the other structures are the same.

Next, the effect will be explained.

During normal operation, the gate valve 7 is closed and the pump P is operated to pump water from the suction tank A to the water receiving tank B.

When cleaning the suction water tank A, the gate valve 7 is opened and the water discharged from the pump P is guided to the return pipe 8 and jetted from the nozzle N, and the jet flow J removes accumulated foreign matter C, which adversely affects the operation of the pump P. Clean the bottom surface A1 by moving it to a position where it will not cause any damage.

At this time, by increasing the velocity distribution of the jet flow J closer to the bottom surface A1, the accumulated foreign matter can be moved and removed effectively, and the suction amount of the pump P can be ensured.

Furthermore, if the pressure loss in the discharge pipe 3 is sufficiently larger than the pressure loss in the return pipe 6, most of the water discharged from the pump P will flow through the return pipe 6, but the discharge valve 5 will be fully closed to reduce the total flow rate. It can also be made to squirt.

If the head of the pump P is considerably larger than the pressure loss of the return pipe 6 and there is a risk that the pump P will be operated in an excessive flow rate range, adjust the opening of the gate valve 7 or close the pressure regulating valve 8. Alternatively, by providing an orifice (not shown) in the middle of the return pipe 6, the pressure loss in the return pipe 6 can be adjusted to an appropriate value.

In addition, water from water tank B is sucked into water tank A for a certain period of time.
If it is acceptable to allow the water to flow backwards, the operation of the pump P may be stopped, and both the discharge valve 5 and the gate valve 7 may be opened to cause the water to flow backwards and be ejected from the nozzle N.

Furthermore, cleaning can be automatically performed at predetermined time intervals by opening the gate valve 7 using a timer (not shown) and closing the discharge valve 5 if necessary, depending on the rate of accumulation of foreign matter.

In addition, if the accumulation rate of foreign matter is high and constant cleaning is required, if the amount of water pumped includes the amount of water necessary for cleaning in advance, continuous cleaning can be performed by keeping the gate valve 7 open. It can be carried out.

[Effects of the invention] As described above, according to the present invention, the following excellent effects are achieved.

(a) The partition plate does not affect the water suction work of the pump and does not diffuse the jet from the nozzle.

(b) Therefore, foreign matter accumulated near the water intake can be effectively moved.

(c) The cleaning effect is improved and less jet flow from the nozzle is required, resulting in labor savings.

[Brief explanation of the drawing]

Figure 1 shows the time of water intake, Figure 2 shows the time of cleaning,
FIG. 3 is a vertical sectional view showing another embodiment of the partition plate. A...Suction water tank, A1...Bottom of the suction water tank, B
... Water tank, C ... Foreign matter, J ... Jet, N ... Nozzle, P ... Pump, 1 ... Water inlet, 2 ... Suction pipe, 3 ... Discharge pipe, 5 ... Discharge valve, 6 ... Return pipe, 7 ... Gate valve, 14, 17, 18 ... Partition plate.

Claims (1)

[Scope of utility model registration request] In pump equipment that takes in water that contains foreign substances such as earth and sand, sludge, and other solid matter, it is installed near the bottom of the suction tank where the pump intake or suction pipe intake is located, or the intake part of rivers, lakes, marshes, oceans, etc. A nozzle is provided near the pump water inlet or the suction pipe water inlet for spouting water discharged from the pump of the pump equipment or another pump along the bottom surface, and furthermore, a partition plate is provided vertically to prevent the water jetted from the nozzle from spreading. A cleaning device for pump equipment, characterized in that a large number of cleaning devices are provided in one direction.