JPH08814U - Traveling screen - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a safe and quiet traveling screen. [Structure] The submersible part of the frame of the traveling screen is provided with the water inlet of the pump, the housing and the spray pipe for removing dust are installed in the housing on the ground, and the space between the water inlet of the pump and the pump is set in the frame. It was connected by a piping.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The industrial application field of the present invention is a field related to a traveling screen which is provided at an intake and captures dust in water.

[0002]

[Prior art]

 For example, at power plants near the sea, seawater is used as cooling water. In the meantime, there are many dust particles in the seawater, including debris, seafood, jellyfish, etc. If the seawater is taken in as it is, these dust particles block the cooling water pipes and impair the function of the cooling device. Therefore, a dust remover is required. A traveling screen provided at the water intake is known as one of such dust removing devices.

FIG. 4 shows an example of a conventional water intake device provided with such a traveling screen. In FIG. 4, the reference numeral 31 designates a concrete-structured water intake, and an opening 32 for taking in seawater is formed at one end thereof. A stop log 33 is provided at a position near the opening 32 side of the water intake 31, and a bar screen 34 is provided side by side with the stop log 33. The bar screen 34 has bars arranged vertically or horizontally at a constant pitch and captures coarse dust particles. A rotary bar screen 35 is arranged behind the bar screen 34. The rotary bar screen 35 is a bar in which end bars are horizontally arranged at a predetermined interval, and the bar is run in a vertical state to catch relatively large dust particles, and the dust particles are trapped in a trough (groove) at the upper end of the frame. Have been dropped.

A traveling screen 36 is provided after the rotary bar screen 35. The traveling screen 36 has a vertically arranged frame 37. A large number of net frames 38 are sequentially arranged along the frame 37 so as to be bendable, and an endless screen is provided. On the other hand, the reference numeral 39 is a submersible pump, which is suspended near the bottom of the water via a pipe 39a. The upper end of the pipe 39a is continuous with the pipe 40 arranged on the ground side, and the pipe 40 is a sprayer (not shown) provided in the housing 41 on the ground portion arranged at the upper end of the frame 37. The fine dust that is continuous with the pipe and that adheres to the screen is dropped into the trough 42 by ejecting a water stream, and is guided to a discharge part (not shown) together with the water. The reference numeral 43 is a pump for pumping the cooling water. As described above, the intake 31 device is provided with several fixed screens and movable screens in multiple stages, and finally the traveling screen 36 removes dust. .

[0005]

[Problems to be solved by the device]

 By the way, in the conventional traveling screen with the above-mentioned structure, the pipe that guides the water to the spray pipe is exposed above the ground, which hinders the operator when inspecting the above-ground part and, in some cases, extremely. It is a danger. Especially at night, the degree of danger is great. In addition, the piping route may become long or complicated depending on the location conditions and layout, resulting in economic loss. Furthermore, if the pipes and pumps were exposed above the ground, they could become a large noise source.

[0006]

[Means for solving problems]

 In the present invention, in order to solve the above-mentioned problems, a water intake portion of a pump is provided in a frame, which is one component of the traveling screen, and the pump and a spray connected to the pump are provided in the housing on the ground. We adopted a structure in which a pipe was installed and the water inlet of the pump and the pump were connected by piping that was guided through the frame.

[0007]

[Action]

 If the structure described above is adopted, the piping is not exposed outside the housing on the ground, safety is increased, the piping route is simplified, and noise can be reduced. In addition, since the pipe is connected to the pump from the water inlet of the pump in the frame of the screen, and the pipe is connected to the spray pipe in the housing, the head loss of the pipe is reduced and the initial pressure That is, the total head can be lowered.

[0008]

【Example】

 Hereinafter, the details of the present invention will be described based on the embodiments shown in the drawings. [First Embodiment] FIG. 1 and FIG. 2 are traveling screens showing a first embodiment of the present invention. In the drawings, reference numeral 1 is a frame forming a part of the traveling screen. The frame 1 is composed of a pair of left and right plate-like portions in a vertical state and a horizontal beam 1a which connects the pair of left and right plate-like portions to each other. There is. The lower end of the frame 1 is formed in an arc shape as shown in Fig. 2, and the tail sprockets 2 are arranged in a pair on the left and right at this portion, and correspondingly, they constitute a part of the traveling screen. In the housing 3 on the ground side, head sprockets 4 are arranged in a pair of left and right. A carrying chain 5 is endlessly stretched between opposing sprockets 2 and 4, and a large number of mesh frames 6 with a mesh mesh are continuously provided.

A drive device (not shown) is provided at the upper end of the housing 3, and it is provided between a sprocket 7 fixed to the output shaft of the drive device and another sprocket 8 integrated with the head sprocket 4. A chain 9 for driving is stretched around. The tail sprockets 2 and 2 are rotatably supported by a shaft 2a, and the head sprockets 4 and 4 are rotatably supported by a shaft 4a. A take-up spindle 10 is provided between the bearings 4b, 4b supporting the shaft 4a and the upper end of the housing 3, so that the carrying chain 5 always has a constant tension so that the screen does not sag. It is devised.

On the other hand, using the horizontal beam 1a of the frame 1, a strainer 19 which constitutes a water intake portion of the pump 17 is arranged in a state of being always located in water. On the other hand, the spray pipe 12 is horizontally arranged on the ground side and below the head sprockets 4 and 4 in the housing 3, and the pump 17 and the pump 17 for driving the pump 17 are installed in the housing 3. The motor 17a is arranged. The spray pipe 12 is provided with a plurality of nozzles 12a facing the trough 13 for discharging dust.

A pump 17 and a motor 17 a for driving the pump 17 are arranged in the housing 3. A pipe 18 passing through the frame 1 connects between the strainer 19, which is the water intake portion of the pump 17, and the pump 17, and a pipe 20 connects between the pump 17 and the central portion of the spray pipe 12. It is connected. Since the pipe 18 is provided between the pair of left and right plate-shaped members of the frame 1, it can be said that the pipe 18 passes through the frame 1. What is indicated by reference numeral 15 is a water channel bottom.

Next, the operation of this embodiment configured as described above will be described. During operation, the head sprocket 4 is rotated via the chain 9 and the carrying chain 5 travels clockwise in FIG. As a result, a large number of net frames 6 horizontally stretched between the carrying chains 5 and 5 travel to trap dust in the water and guide it upward.

On the other hand, during the operation of the traveling screen, the pump 17 is always operating, whereby the water sucked through the strainer 19 is guided to the spray pipe 12 through the pipes 18 and 20, and is jetted from the nozzle 12a. It is ejected toward the frame 6. Therefore, the collected dust is blown outward by the jet of water, falls through the draft plate 16 into the trough 13 together with the water, and is guided to an outlet not shown by the water flow.

On the other hand, in the present embodiment, the water inlet portion of the pump 17 including the strainer 19 and the pipe 18 connecting the pump 17 and the water inlet portion are arranged inside the frame 1, and the pump 17 is also provided. Since the structure in which the pipe 20 that connects between the spray pipe 12 and the spray pipe 12 is arranged inside the housing 3, the pipes 18 and 20 are not exposed to the outside of the housing 3 on the ground, and are a hindrance to the operator during inspection. I won't. Further, since the strainer 19 and the pipe 18 are arranged in the frame 1, the pipe layout can be simplified, the pipe route can be simplified, and it is extremely economically advantageous. Further, since the pipes 18 and 20 and the motor 17a are not provided outside the housing 3, noise is reduced. Furthermore, since the pipe is formed from the water intake portion of the pump 17 to the spray pipe 12 via the pump 17 in a relatively short and nearly direct form, the head loss of the pipe is reduced and the initial pressurizing force is correspondingly reduced. , That is, the total head can be lowered.

[Second Embodiment] FIG. 3 illustrates a second embodiment of the present invention. In the present embodiment, the first embodiment is modified so that the motor 17a is mounted on the housing 3a. The structure is placed outside. If such a structure is adopted, the motor 17a is located outside the housing 3, which is disadvantageous in terms of noise, but the maintenance of the motor becomes easy. In other respects, all the advantages of the built-in type can be satisfied.

[0016]

[Effect of device]

 As is clear from the above description, according to the present invention, the water inlet of the pump is provided in the submerged part of the frame, which is one component of the traveling screen, and the housing of the above-ground part, which is one component of the traveling screen, is provided. A pump and a spray pipe for dust removal connected to this pump are installed inside, and a structure is used in which the water inlet of the pump and the pump are connected by a pipe that passes through the frame. Since there is no piping outside the housing, the inspection work is not disturbed, the piping layout can be simplified, economical loss is prevented, and there are few exposed parts on the ground, so there is less noise. Become. In addition, since the water inlet of the pump, the pump and the spray pipe are almost directly connected to each other, the head loss due to the piping is reduced, and the initial pressurizing force, that is, the total head is reduced accordingly. You can

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of the present invention.

FIG. 2 is a side view showing a first embodiment of the present invention.

FIG. 3 is a schematic front view showing a second embodiment of the present invention.

FIG. 4 is a sectional view of a water outlet device portion showing a conventional structure.

[Explanation of symbols] 1 frame 1a horizontal beam 2 tail sprocket 3 housing 4 head sprocket 5 carrying chain 6 mesh frame 12 spray pipe 12a nozzle 17 pump 17a motor 18 piping 19 strainer 20 piping

Claims (1)

[Scope of utility model registration request] 1. A water suction port of a pump is provided in a submerged portion of a frame which is a constituent member of a traveling screen, and a pump and dust which is connected to the pump are removed in a housing on the ground portion which is a constituent member of the traveling screen. And a spray pipe for the pump, and the water suction port of the pump and the pump are connected by a pipe passing through the frame.