JPS61150922A - Running water transfer device with high pressure injection nozzle - Google Patents

Abstract

PURPOSE:To allow wear, which is caused by sands and others contained in fluid flow, of inner surfaces of a suction pipe, a discharge pipe, and a retarding chamber to be reduced by arranging a retarding chamber between the suction pipe and the discharge pipe associated with inner pipes which are arranged into the suction and discharge piped where the fluid flow is high. CONSTITUTION:The flow rate of a fluid containing sands and gravels which are sucked in from a suction pipe 1 is decreased in a retarding chamber 3, and is guided by an inner pipe 8 which extends into the inside of the retarding chamber 3 where a centrifugal force that is caused by curved fluid flow, becomes smaller allowing the fluid to flow into a discharge pipe 2 together with high pressure water flow. In this case, the inner pipe 8 is intended to be inserted detachably as required into only both the suction pipe 1 and the discharge pipe 2, and as the inner pipe 8 on the discharge pipe 2 side is projected into the retarding chamber 3, the inner pipe 8 enables wear of inner surfaces of the suction pipe 1 and discharge pipe 2 to be reduced, and even more the decrease in a flow rate allows wear of the inner surface of the retarding chamber 3 to be reduced.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a conveying device using a high-pressure liquid jet nozzle, which is used for pumping out sewage, suctioning and conveying sand, gravel, mud, garbage, etc. Regarding.

[Conventional technology]

A jet pump in which a large passage area is interposed between the suction passage and the discharge passage, and the nozzle is opened at the back of the mixing chamber equipped with the air suction passage, and the tip of the mixing chamber discharges the air. It is supported and fixed on the wall of the cavity with the jet axis extending to the entrance of the pipe and aligned with the axis of the discharge pipe (Japanese Patent Application Laid-Open No. 1983-74506), with a wear-resistant inner surface of the flow passage. A structure in which an inner tube made of a material is inserted and supported in a replaceable manner (the one disclosed in Japanese Utility Model Application Laid-Open No. 124205/1983 is known).

[Problem that the invention seeks to solve]

The former jet pump mentioned above is designed to discharge gas and liquid at the same time, and in order to suck and flow sand, gravel, etc., a pre-mixing chamber and a mixing chamber that form a two-stage jet are required. It obstructs the flow and is extremely abrasive, making it unsuitable for use. The latter structure, in which the entire interior is coated with a wear-resistant material, has the disadvantage that the structure becomes extremely complex and the device becomes expensive.

The present invention eliminates wear on the inner wall surface of the passage caused by centrifugal force, flow velocity inertia force, and contracted flow acting on particles such as sand in the flow passage changing part where the high-pressure water jet flow and the suction flow merge to form the discharge flow. The purpose is to significantly reduce the flux of the suction tube passageway diameter with a simple configuration without narrowing it.

[Failure to solve the problem]

The suction pipe and the discharge pipe are connected through a slow speed chamber with a passage area larger than the passage area of the suction pipe, and a high-pressure liquid is placed on the side wall of the slow speed chamber, facing the direction of the discharge pipe and coinciding with the center line of the discharge pipe. In a device equipped with an injection nozzle, the high-pressure liquid injection nozzle is installed at the back of a protection tube to which the atmospheric air introduction tube is connected and opened, and this protection tube has its tip connected to a flow path with a large inner diameter of the suction tube formed in the slow speed chamber. It is supported and fixed on the wall of the slow speed chamber without protruding into the interior, and replaceable inner tubes made of a material with excellent wear resistance are provided at the terminal end of the suction pipe and the starting end of the discharge pipe.
In particular, the gist is a flow device using a high-pressure water jet nozzle in which the inner pipe next to the discharge pipe is configured to protrude into the slow speed chamber.

〔Example〕

FIG. 1 shows a slow speed chamber 3 having a substantially spherical shape and a passage larger than the suction passage, and an air introduction pipe 6 connected to the side wall and opening into the protection pipe 5 having a diameter larger than the nozzle diameter. The injection part to which the nozzle 4 is connected to the piping and the inner pipe 8 made of a material with excellent wear resistance are made to protrude into the slow speed chamber, and the tip part has a surface-forming structure for suction fluid collision and can be inserted and supported in a detachable manner. The discharge pipe 2 and the discharge pipe 2 are arranged facing each other in the slow speed chamber 3 with their axes aligned without allowing the tip of the protective pipe 5 to protrude into the flow path having a large inner diameter of the suction pipe. To install the discharge pipe in step 3, connect and open the suction pipe 1 to the wall of the slow speed chamber below the position, and also install the inner pipe 8 inside this suction pipe 1.
' is inserted and supported, and its terminal end protrudes into the slow speed chamber.

In the figure, reference numeral 7 denotes a connecting pipe extending to the wall of the slow speed chamber 3 for screwing and supporting the protective tube 5, but the protective tube 5 may be directly welded.

FIG. 2 shows the slow speed chamber 3 in the form of a drum, and each number is the same as in FIG. 1.

FIG. 3 shows a structure in which the tip of the inner tube 8 is cut at right angles to the axis and projects into the slow speed chamber 3.

Furthermore, the direction and number of suction tubes l are not limited to the example shown by solid lines, but may be the direction and number shown by imaginary lines.

[Operation and effect of the invention]

The device of the present invention described above and shown in the examples provides a slow speed chamber between the suction pipe and the discharge pipe, inserts and supports the inner pipe only into the suction pipe and the discharge pipe where the flow rate is high, and inside the slow speed chamber Since the configuration is such that the high-pressure water body is injected in the direction of the discharge pipe while ensuring a flux equal to the diameter of the suction pipe, the fluid containing sand, gravel, etc., sucked from the suction pipe has a slow flow velocity in the slow speed chamber. With the centrifugal force generated by the bending of the flow reduced, the water flows into the discharge pipe together with the high-pressure water while being guided by the inner pipe extending into the slow speed chamber. For this reason, the suction pipe and discharge pipe are connected by an inner pipe, and
In the slow speed chamber, wear is reduced by decreasing the flow velocity. In particular, since the tip of the protective tube or nozzle protrudes to a position that does not impede the flux and flow velocity, these items will not be worn out by the suction fluid, and
Compared to a device in which a nozzle or the like lies within the flux, flow resistance loss is significantly reduced, resulting in a flow device with extremely high flow efficiency.

In addition, the inner tube is inserted and supported only in the suction tube and the discharge tube in a detachable manner, and in particular, the inner tube next to the discharge tube is made to protrude into the slow speed chamber, so that there is no significant wear that occurs when flowing from the slow speed chamber to the discharge tube. , the burden is borne exclusively by the protruding portion of the inner pipe, and wear of the slow speed chamber and the discharge pipe is suppressed. Furthermore, when replacing the inner tube, there is no need to disassemble the entire device, and it is possible to provide an inexpensive flow device that can be easily replaced by partial disassembly.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view of the device of the present invention in which the slow speed chamber is approximately spherical; Fig. 2 is a sectional view in which the slow speed chamber is drum-shaped;
The figure is a sectional view of a discharge pipe without a surface portion projected into a slow speed chamber. 1. Suction pipe 2. Discharge pipe 3. Slow speed chamber 4. Nozzle 5. Protection tube 6. Atmospheric inlet pipe 8.8'.
inner tube

Claims (1)

[Claims] (1) The suction pipe and the discharge pipe are connected through a slow speed chamber with a passage area larger than the passage area of the suction pipe, and the direction of the discharge pipe is aligned with the center line of the discharge pipe on the side wall of the slow speed chamber. In a device equipped with a high-pressure liquid injection nozzle, the high-pressure liquid injection nozzle is installed at the back of a protection tube to which the atmospheric air introduction tube is connected, and this protection tube has its tip connected to a large-diameter suction tube formed in the slow speed chamber. The suction tube is supported and fixed on the wall of the slow speed chamber without protruding into the flow path, and a replaceable inner tube is provided at the terminal end of the suction tube and the beginning end of the discharge tube, especially the inner tube next to the discharge tube. A flow device that uses a high-pressure liquid injection nozzle configured to protrude into the slow speed chamber.