JP3012025U - Suction transport device - Google Patents

Abstract

(57) [Summary] [Purpose] Since the structure is extremely simple and maintenance is easy,
(EN) Provided is a suction-conveying device capable of further improving energy efficiency by fully utilizing the advantage of a jet pump suitable for suction-conveying a solid-liquid mixture such as sedimentation in a sand basin. In a device for sucking and transporting a liquid or a solid-liquid mixture by utilizing a negative pressure effect generated by jetting of high-pressure water, a plurality of high-pressure water jet nozzles 3 are provided on an outer peripheral portion in a predetermined direction in a transport direction and a tangential direction. A distribution pipe 2 of an object to be conveyed arranged at an angle, and a high-pressure water jet nozzle 3 of the main distribution pipe 2.
An outer cylinder 4 that concentrically surrounds the disposition part and closes both open ends.
And a high-pressure water supply pipe 7 connected to an empty cylinder portion 8 formed by the flow pipe 2 and the outer cylinder 4 in a communicating manner.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a suction-conveying device that sucks and conveys a liquid or a solid-liquid mixture by utilizing a negative pressure effect generated by jetting high-pressure water.

[0002]

[Prior art]

 Conventionally, jet pumps have been used as one of the devices for discharging and transporting sand and sludge that settle and accumulate in sand basins installed in sewage treatment plants and water purification plants, or muddy water and sediment generated in civil engineering work. It is used.

The jet pump is a device that injects a high-pressure fluid such as water or air to generate a negative pressure in an injection portion, and suctions and conveys an object to be conveyed by the generated negative pressure. Compared to rotary pumps, etc., it has no moving mechanical parts, its structure is extremely simple, and it is easy to maintain and manage due to less wear and damage, and it is widely used for transporting liquids containing hard solid matter. .

As an example of a conventional jet pump, a device (for example, Japanese Patent Laid-Open No. 63-138200) in which a suction pipe of a conveyed object is connected in front of a jetting portion of a high-pressure water jet nozzle, or a device which is concentric with the suction pipe There is known a device in which a high-pressure water jet nozzle is arranged in a circular shape (Japanese Patent Laid-Open No. 60-142099, etc.) and the like.

[0005]

[Problems to be solved by the device]

 In the above conventional jet pump, in the device in which the suction pipe of the transported object is connected in front of the high-pressure water jet nozzle, the high-pressure water and the transported object are in a crossing state at the confluence point, and therefore more than necessary. Turbulent flow resistance is generated, and the flow rate of the high-pressure water flow is reduced to reduce the negative pressure, which has the drawback of lowering the transport efficiency.In addition, solid matter in the transported object collides with the pipe wall due to inertia and It has the drawback of abrading walls and causing noise.

In the device in which the high-pressure water jet nozzle is concentrically arranged with the suction pipe, the above-mentioned drawback can be remedied, but since the high-pressure water and the transported object form a linear parallel flow, both As the mixing of the two becomes too slow, the transport energy of the high pressure water flowing through the pipe wall side before the energy transfer between the two is attenuated more than necessary due to the pipe wall resistance, and therefore the suction and transport efficiency becomes low. There are drawbacks.

As described above, the jet pump has an extremely simple structure and is easy to maintain and manage, so it is suitable for sucking and transporting a solid-liquid mixture such as settling in a sand basin, but has low energy efficiency and power consumption. Since the cost is high, it is desired to improve the efficiency, and the present invention has been made for the purpose of providing a suction-conveying device which can make full use of the advantages of the jet pump and further improve the energy efficiency. .

[0008]

[Means for Solving the Problems]

 The gist of the present invention for achieving the above-mentioned object is to provide a plurality of high-pressure water jet nozzles 3 on the outer peripheral portion thereof with a flow pipe 2 for conveying an object to be conveyed, in which the nozzles 3 are inclined at a predetermined angle in the conveying direction and the tangential direction, respectively. The high-pressure water is injected into an outer cylinder 4 concentrically surrounding the high-pressure water jet nozzle 3 installation portion of the main flow pipe 2 and closed at both ends, and an empty cylinder portion 8 formed by the flow pipe 2 and the outer cylinder 4. The suction conveyance device is characterized in that the supply pipes 7 are connected and connected.

Further, in the suction-conveying device, the plurality of high-pressure water jet nozzles 3 are arranged in a zigzag manner at appropriate intervals in the circumferential direction and the axial direction of the flow pipe 2 of the conveyed object.

[0010]

[Action]

 When the high-pressure water is supplied from the high-pressure water supply pipe 7 to the hollow cylinder portion 8, the high-pressure water jet nozzle 3 injects the high-pressure water into the flow pipe 2 of the transported object, and the negative pressure generation unit 6 generates a negative pressure.

The object to be conveyed is sucked to the negative pressure, is sucked from the suction pipe 1, is mixed with high-pressure water, and is conveyed to the destination via the discharge pipe 9 of the flow pipe 2.

By jetting the high-pressure water in a tangential direction of the negative pressure generating portion 6 so as to draw a spiral in the jetting direction, a vortex is formed, and a stronger negative pressure is obtained in the central portion, and The material to be conveyed is appropriately mixed, and the energy transfer between the two is favorably performed, so that the suction and conveyance efficiency is also increased.

Further, by arranging the plurality of high-pressure water jet nozzles 3 in a zigzag manner at appropriate intervals in the circumferential direction and axial direction of the flow pipe 2 of the transported object, a uniform negative pressure is generated in a long axial direction. The effect will also increase.

[0014]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a vertical cross-sectional view of an embodiment of the present invention applied to a sand lifting device for a settling basin.

Reference numeral 1 is a suction pipe for sucking an object to be conveyed such as sand settling, and a flange is provided at the upstream end of the suction pipe, and a long pipe or the like for conveying a long pipe reaching the sedimentation settling at the bottom of the sand basin at the flange part. The appropriate pipe is connected. The length and diameter of the suction tube 1 are appropriately set depending on the application, the processing amount and the like.

Reference numeral 2 denotes a distribution pipe for the conveyed object, which discharges a mixed flow of the conveyed object sucked by the suction pipe 1 and high-pressure water and has a discharge pipe 9 on the downstream side, which is slightly wider than the suction pipe 1. In addition, a plurality of high-pressure water jet nozzles 3 are arranged on the outer peripheral portion, and a negative pressure generating portion 6 caused by the high-pressure water jet is provided.

The high-pressure water jet nozzles 3 are arranged so as to be inclined at predetermined angles θ ₁ and θ ₂ in the conveying direction and the tangential direction of the conveyed object in the flow pipe 2, respectively, and in the circumferential direction and the axial direction. It is preferable that they are arranged in a zigzag pattern at appropriate intervals.

Reference numeral 4 denotes an outer cylinder that concentrically surrounds the high pressure water jet nozzle 3 of the flow pipe 2 and has open ends at both ends closed by closing members 5 a and 5 b. The high-pressure water supply pipe 7 is connected to and connected to the hollow cylinder portion 8 formed in Step 1.

In the above embodiment, the high-pressure water jet nozzle 3 is arranged on the outer peripheral portion of the flow pipe 2 of the transported object having the discharge pipe 9 on the downstream side, but the suction pipe 1 is used as the flow pipe 2. The high-pressure water jet nozzle 3 may be arranged, or another member connecting the discharge pipe 9 and the suction pipe 1 may be provided, and the member may be used as the flow pipe 2 and the high-pressure water jet nozzle 3 may be arranged.

Further, it is also preferable to introduce air into the flow pipe 2 of the transported object together with the high-pressure water injection from the viewpoint of preventing cavitation and the like. In that case, the air introduction nozzle has a suction pipe section. 1 or the negative pressure generating unit 6, and the air is atmospheric air or pressurized air.

Next, the operation of lifting sand settling in the sand basin by the suction / conveyance device having the above-described structure will be described. When high-pressure water is supplied from the high-pressure water supply pipe 7 to the empty cylinder part 8, the high-pressure water injection nozzle 3 causes High-pressure water is jetted into the distribution pipe 2 of the conveyed product, and a negative pressure is generated in the negative pressure generating unit 6.

The generated negative pressure is suctioned and the sand is suctioned from the bottom of the sand basin through the pipe connected to the suction pipe 1, mixed with high pressure water in the negative pressure generation unit 6 and discharged from the discharge pipe 9. Transported to the destination.

By injecting in a tangential direction of the negative pressure generating unit 6 so that the high pressure water is sprayed in a spiral direction, a vortex is formed, a strong negative pressure is obtained in the center, and high pressure water and The material to be conveyed is appropriately mixed, and energy transfer between the two is favorably carried out, so that the suction and conveyance efficiency is also increased.

Further, by arranging the plurality of high-pressure water jet nozzles 3 in a zigzag manner at appropriate intervals in the circumferential direction and the axial direction of the flow pipe 2 of the transported object, a uniform negative pressure is generated in a long axial direction. The effect will also increase.

The amount and pressure of the high-pressure water introduced are appropriately set depending on the condition of the object to be conveyed, but cavitation is likely to occur depending on the setting conditions. -It is also preferable to prevent the occurrence of friction and to expect an air lift effect.

[0026]

[Effect of device]

 According to the jet pump of the present invention, the following effects can be obtained. Jet pumps have no moving mechanical parts, have a very simple structure, and are less likely to be worn or damaged as compared with centrifugal pumps and rotary pumps, so they are easy to maintain and manage, and liquids that contain solid solid matter. The advantages of being suitable for the transportation of materials, etc. are fully utilized, the drawbacks of low energy efficiency and high power cost are improved, and energy efficiency is further improved.

[Brief description of drawings]

1 is a longitudinal sectional view of an embodiment of the present invention: 1: suction pipe 2: flow pipe 3: high-pressure water injection nozzle 4: outer cylinder 5a, 5b: closing member 6: negative pressure generating unit 7: high-pressure water supply pipe 8: Empty cylinder 9: Discharge pipe

Claims (2)

[Scope of utility model registration request] 1. A device for sucking and transporting a liquid or a solid-liquid mixture by utilizing a negative pressure effect generated by jetting of high-pressure water, wherein a plurality of high-pressure water jet nozzles (3) are provided in an outer peripheral portion in a transport direction and a tangential direction. And the high-pressure water jet nozzle (3) installation portion of the main distribution pipe (2) are concentrically surrounded by the distribution pipe (2) of the transported object, which is inclined at a predetermined angle. Outer cylinder (4) closed, distribution pipe (2) and outer cylinder (4)
A suction and conveyance device characterized in that a high-pressure water supply pipe (7) is connected to an empty cylinder part (8) formed by the above. 2. A plurality of high-pressure water jet nozzles (3) are arranged in a zigzag pattern at appropriate intervals in the circumferential direction and axial direction of the flow pipe (2) of the transported object. Suction transfer device.