JPS6045317B2 - Precipitation device in jet pump equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a precipitation device in a so-called jet pump device in which a jet body is used in combination with a centrifugal pump.

A jet pump device used in deep wells has a nozzle part and a throat tube that constitutes a differential user, and has a jet body that is installed in the well water, and a jet pipe that supplies water to the nozzle part and a throat tube. The pump is connected to the water suction pipe on the discharge side of the jet and is installed on the ground.By injecting pressurized water from the nozzle of the jet, the water is sucked in from the suction pipe at the bottom of the jet body. The water is pumped up through the differential user and the absorption water pipe. In such jet pump devices, the jet vibe and water suction vibe are quite long, so when the entire jet pump is taken out of the well due to a failure of the jet part or other necessity, the jet vibe and water suction vibe may be filled with water. The weight of water inside both vibrators can reach 20k9, which is extremely heavy and difficult to lift.Therefore, jet pumps have traditionally been equipped with a precipitation device to drain the water inside the vibrators. I'm awake.

As a conventional precipitation device, for example, there is one in which the water in both the jet and the water suction vibrator is discharged by lifting the valve body of a check valve (hood valve) provided at the lower part of the jet main body from the valve seat. In this case, in order to lift the valve body from the valve seat, a push-up rod 22 is provided protruding from the center of the lower part of the valve body 21 as shown in FIG. 5, and this push-up rod 22 is connected to a screw-type lever 23. However, a string 24 such as a wire connected to the lever 23 is extended above the ground, and by pulling the string 24 from the ground, the valve body 21 is pushed up. However, in the case of a precipitation device with the above configuration, the lever may not work properly because the string gets wrapped around the vibrator, gets stuck in the gap between the jet and water absorbing vibrators, or gets caught on the vibe holder. The valve body sometimes did not lift up. Further, a backing 26 made of rubber or the like is attached to the lower surface of the valve body 21 between it and the valve seat 25, but when the lift is large, the valve body 21 always has a
Since water pressure of about kg/d is applied, backing 26
The water pressure causes the valve seat to close. If the valve body 21 is pushed up because it tends to remain stuck in the valve body 25, there are drawbacks such as the backing 26 not being able to rise completely and preventing precipitation, or the backing 26 deforming and interfering with subsequent use. Ta. In particular, if the nozzle of the jet body becomes clogged with pebbles, dirt, etc., it is necessary to allow the water to flow backwards due to the structure of the tapered nozzle, but in the above-mentioned precipitation device, water does not flow backwards, so pebbles, etc. I couldn't get it off, so I had to send high-pressure water to the water-absorbing vibrator to create enough force to make the pebbles float and come out. The present invention eliminates the drawbacks and inconveniences of the conventional device as described above, has a simple structure, can be manufactured easily and inexpensively, has sufficient strength, and has excellent usability that allows precipitation operations to be performed extremely reliably and easily. It was invented in order to obtain something.

That is, the present invention provides the above jet pump device in which the lower end of the jet vibrator is slidably fitted and connected to the jet main body, and a drain hole is formed in both the jet vibrator and the jet main body at this fitting portion. The invention is characterized in that both of the water drainage holes can be freely aligned with each other by the sliding operation of the jet vibrator. Examples thereof will be described below with reference to the drawings. Reference numeral 1 denotes a jet main body having a well-known structure, which includes a throat tube 2 that constitutes a differential user above the nozzle part 3 of the jet in the axial direction, and the water supply side to the nozzle part 3 extends upward through a substantially U-shaped lower bent part. The suction port 4 is formed as a fitting receiving hole 7 of a required length and is opened at the bottom thereof, and a suction port pipe 4 communicating with the ejection side of the nozzle portion 3 and equipped with a check valve 5 is provided at the lower part.

This jet body 1 is connected to a centrifugal pump 12 installed on the ground via a jet vibe 6 connected to the fitting receiving hole 7 and a water suction vibe 10 connected to the throat tube 2.
The upper end of the jet vibrator 6 is connected to the discharge side of the centrifugal pump 12, and the water suction vibrator 10 is connected to the suction side. Therefore, the jet vibe 6 described above has a tube body 6b for fitting connection fixed to the lower end of the vibe body 6a, and the lower part of this tube body 6b is artificially connected to the fitting hole 7 of the jet body 1. It is mated and connected so that it can be slid on.

In this fitting part, a water drainage hole 8 is formed on the side of the fitting receiving hole 7 of the jet main body 1, and the water drainage hole 8 is also formed in the pipe body 6b of the jet vibe 6 at the same height. A water drain hole 9 is formed in the water drain hole 9, and the water drain holes 8 and 9 are normally shifted in position from each other in the circumferential direction, and can be matched by rotating the jet vibrator 6 by a required angle, The structure is such that the water inside the vibrator can be rained down. In particular, it is preferable for the jet vibrator 6 to connect the short tube body 6b to the lower end of the vibrator main body 6a as described above, as this makes it easier to process the fitting part, water drainage hole 9, etc. It is also possible to directly fit and connect the lower end of the main body 6a to the jet main body 1. In addition, although the above embodiment shows the case where the drain holes 8 and 9 of both the jet main body 1 and the jet pipe 6 are formed at the same height position,
In the present invention, both water drainage holes 8 and 9 are formed at positions corresponding to the upper and lower sides in a normal fitted and connected state, and the jet vibe 6
sliding in the extraction direction with respect to the jet body 1, etc. The drain holes 8 and 9 may be aligned with each other by a sliding operation by vertical movement of the drain holes 8 and 9, or both drain holes 8 and 9 may be formed with their positions shifted vertically and circumferentially. It is also possible to implement a structure in which the jet vibrator 6 is rotated and moved up and down to perform a sliding operation so that the drain holes 8 and 9 can be aligned with each other.

In any of the embodiments, the jet main body 1 and the jet vibrator 6 can be slid together with a strong artificial force, but the fitting is carried out in such a way as to prevent water from leaking between the two. moreover,
Reference numeral 11 denotes a vibe holder that connects and holds the jet vibe 6 and the water-absorbing vibe 10. When carrying out the present invention, the jet vibe 6 is held so as to be rotatable and vertically movable as shown in FIG.

The present invention is configured as described above, and the jet main body 1
When the jet pump is installed in water in a well and it is necessary to pull the jet pump out of the well due to a malfunction of the jet part, etc., to drain the water in the jet vibrator and the water absorption vibrator, or to make it rain, use the jet vibrator 6. Remove the upper end from the connection with the centrifugal pump 12, and remove the jet vibe 6.
It is easy to slide the drain holes 8 and 9 provided in the fitting part of the jet body 1 and the jet vibrator 6 so that they match each other.For example, in the illustrated embodiment, as shown in FIG. The jet vibe 6 is rotated approximately 180°C to align the water drainage holes 8 and 9 with each other, and if the water drainage holes 8 and 9 are vertically shifted, the jet vibe 6 is slid up and down relative to the jet body 1, for example by lifting it, so that both drainage holes 8 and 9 are aligned; at this time, the upper end of the jet vibrator 6 is removed from the centrifugal pump and opened. In addition, the jet vibrator 6 alone can be lifted without any problem without receiving the weight of the water while leaving the water inside intact.

By aligning the water drain holes 8 and 9 in this way, not only the water inside the jet vibrator 6 but also the water inside the water absorption vibrator 10 can be transferred to the nozzle part 3.
The water flows backwards and is reliably discharged from the matching drainage holes 8 and 9. As described above, the present invention connects the lower end of the jet vibrator 6 to the jet main body 1, and forms drain holes 8 and 9 in both the jet main body 1 and the jet vibrator 6 at this fitting portion. Since the water holes 8 and 9 are configured to be able to match each other by sliding the jet vibrator 6 against the jet body 1, precipitation can be performed with an extremely simple operation, and in particular, the jet vibrator itself can be used as an operating member for precipitation. Since the jet vibrator is strong, there is no need for other operating members such as conventional strings, so even if the jet body and jet vibrator are tightly fitted, it can be easily operated. It can be operated slidingly, making it possible to perform precipitation work reliably.

If the nozzle part is clogged with pebbles or dirt, the water inside the vibrator is caused to rain down, so that the water on the suction vibrator side flows through the nozzle part to the side with the larger inner diameter, and the water on the jet vibrator side flows first. Because the flow velocity at the nozzle part from the water absorption vibrator side increases when it flows out, it is easier to remove the pebbles, etc.
Moreover, there is an advantage that the water can be drained from the drainage hole without having to float above the vibrator as in the conventional case. Furthermore, the structure of the present invention as a precipitation device is extremely simple, and it is easy to manufacture as it does not require levers or strings, and is more durable and less likely to malfunction than a conventional check valve that lifts up. There is no risk that rain cannot occur, and the work of lowering the jet pump into the well becomes easier. Therefore, the present invention is an invention that can eliminate all the conventional drawbacks and inconveniences as a precipitation device for a jet pump, and can also exhibit excellent usage effects.

[Brief explanation of the drawing]

7. Fig. 1 is a longitudinal sectional front view showing an embodiment of the present invention, Fig. 2 is a sectional view taken along the line ■-■ in the previous figure, and Fig. 3 is a sectional view showing the usage state of a jet pump device equipped with the device of the present invention. , FIG. 4 is a plan view of the same, and FIG. 5 is a sectional view showing the conventional precipitation device. 1...Jet body, 3...Nozzle part, 5...Check valve, 6...Jet vibe,
6a...Vibrator body, 6b...Pipe body for fitting connection, 8, 9...Drainage hole, 10...
・Water-absorbing vibe.

Claims (1)

[Claims] 1. A jet main body 1 which is provided with a throat tube 2 constituting a differential user above a nozzle part 3 of the jet and is installed in well water, and a jet main body 1 which is provided with a throat tube 2 constituting a differential user above a nozzle part 3 of the jet, and a jet main body 1 which is provided with a throat tube 2 constituting a differential user above a jet nozzle part 3 and which is installed in well water. It consists of a combination of a jet pipe 6 and a swirl pump 12 connected to the water intake pipe 10 on the discharge side from the throat tube 2 and installed on the ground. In a jet pump device that pumps water sucked from a suction port pipe 4 at the lower part of the jet body 1 through the differential user and the water suction pipe 10 by injecting water, the lower end of the jet pipe 6 is connected to the jet body 1. Water drainage holes 8 and 9 are formed in both the jet main body 1 and the jet pipe 6 at this fitting part, and the water drainage holes 8 and 9 are connected to the jet main body 1 in a slidable manner. A precipitation device in a jet pump device, characterized in that the pipe 6 can be freely matched by sliding operation. 2. The drain holes 8 and 9 of the jet main body 1 and the jet pipe 6 that are fitted and connected are formed at the same height position, and can be freely mated by sliding operation by rotating the jet pipe 6. A precipitation device in a jet pump device according to claim 1. 3. The drain holes 8 and 9 of the jet main body 1 and the jet pipe 6 that are fitted and connected are formed in vertically corresponding positions, so that they can be freely mated by sliding operation by vertical movement of the jet pipe 6. A precipitation device in a jet pump device according to claim 1, characterized in that: 4 The drain holes 8 and 9 of the jet main body 1 and the jet pipe 6 that are fitted and connected are formed with their positions shifted in the vertical and circumferential directions, so that the jet pipe 6 can be slid by both rotation and vertical movement. 2. The precipitation device in a jet pump device according to claim 1, wherein the precipitation device is configured such that the precipitation device can be freely matched. 5. Claims 1, 2, 3 or 5, characterized in that the jet pipe 6 has a pipe body 6b connected to the lower end of the pipe body 6a for fitting connection to the jet body 1. The precipitation device in the jet pump device according to any one of Item 4.