JPS626120B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a jet pump device, and more particularly, to a jet pump device connected to the suction side of a rotary pump such as a turbine pump.

[Conventional technology]

As this type of jet pump device, the patent application
- The one shown in No. 12949 (Special Publication No. 57-50960) was devised. That is, the jet pump section,
A control section (valve device) is provided to short-circuit and communicate with the jet pump section, and the jet pump section is constituted by a nozzle, a vent lily, and a pressure waterway that supplies pressure water to the nozzle, and the control section has an inlet side connected to the pressure waterway. A main valve back pressure chamber having a throttle provided in a communicating first diaphragm and having an outlet side as a through hole communicating with a vent lily rear pressure chamber (pressure intensifying chamber) communicating with a discharge waterway having a lower pressure than the pressure waterway; a first diaphragm that applies operating force to the main valve in response to a pressure difference between the front and rear; an upper end of the valve shaft is attached to the first diaphragm; the main valve operates together to open and close the pressure waterway; the main valve communicates with the suction passage; a pressure chamber in front of the bench lily, a pilot valve (operating valve) that opens and closes the passage hole by applying an actuation force from a second diaphragm that responds to the pressure difference between the front pressure chamber of the bench lily and the rear pressure chamber of the bench lily; a throttle formed to create resistance from the pressure chamber after the bench lily to the discharge passage side so that the pressure in the pressure chamber is slightly higher when the pilot valve is open than when it is closed;
It was constructed by

In this case, in order to prevent clogging of the throttle provided in the first diaphragm communicating with the pressure waterway and the adhesion of foreign matter to the valve seat of the pilot valve, a filter is attached to the main body of the control unit, and the main valve is inserted through the filter. is provided.

[Problem that the invention seeks to solve]

According to such conventional jet pump devices, the main valve is provided passing through the filter attached to the control body, so a gap is provided between the filter and the main valve so as not to hinder the movement of the main valve. However, there was a problem in that foreign matter could enter through this gap. Further, there was a problem in that foreign matter got caught in this gap and hindered the operation of the main valve. Furthermore, since the filter is attached to the main body of the control unit in a fixed state, the filter cannot move and apply an impact force to remove foreign matter adhering to the filter.

[Means for solving problems]

The present invention has been made to solve this problem, and includes a jet pump section 5 and a valve device 20 that is short-circuited and communicated with the jet pump section 5.
The valve device 20 is constituted by a pressure waterway 3 that supplies pressure water to the nozzle 12, and the valve device 20 has an inlet side as a throttle 25 communicating with the pressure waterway 3 and an outlet side as a discharge waterway 4 having a lower pressure than the pressure waterway 3. The main valve back pressure chamber 2 has a through hole 33 that communicates with the pressure boosting chamber 37 that communicates with it.
7. In response to the pressure difference before and after the throttle 25, the main valve 2
4, the upper end of the valve shaft is attached to the first diaphragm 30 and operates together to open and close the pressure waterway 3, the main valve 24, and the front of the bench lily communicating with the suction passage 10. a pressure chamber 38; a second diaphragm 36 that responds to the pressure difference between the bench lily front pressure chamber 38 and the pressure increase chamber 37;
an operating valve 34 that opens and closes the through hole 33 by applying an actuation force to the operating valve 34; 37 to the discharge passage 4
Relief passage 3 formed to create resistance on the side
9, in which the throttle 25 is formed in a part of the valve shaft of the main valve 24, and the
This jet pump device is characterized in that a filter 28 is integrally attached around the valve shaft of No. 4 so as to cover the throttle 25.

[Effect]

According to the jet pump device of the present invention,
The throttle 25 is formed in a part of the valve shaft of the main valve 24, and the filter 28 is integrally attached to the main valve 24 so as to cover the throttle 25 around the valve shaft of the main valve 24. moves together with the main valve 24, and foreign matter adhering to the filter 28 is peeled off by the impact when the main valve 24 opens and closes. As a result, the filter 28 is automatically cleaned and its clogging can be eliminated.
Further, since the movement of the main valve 24 is not hindered by the filter 28, there is no need to provide a gap between the main valve 24 and the filter 28. This prevents foreign matter from entering between the main valve 24 and the filter 28 and clogging the throttle 25, and prevents foreign matter from getting caught in this gap and interfering with the operation of the main valve 24. Problems can be resolved.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

First, FIG. 1 shows the installed state of a shallow well pump in which a jet pump device according to an embodiment of the present invention is combined with an ordinary rotary pump.

In the figure, 1 is a turbine pump part related to a rotary pump, 2 is a discharge pipe, 3 is a pressure waterway, 4 is a discharge waterway,
5 is a jet pump unit related to the jet pump device, 6 is a check valve, 7 is a suction pipe, 8 is a water source, and W indicates water. That is, the water W sucked up through the suction pipe 7 and the check valve 6 is pressurized by the jet pump section 5, and then pressurized by the turbine pump section 1. Except for the water that is returned to the waterway 3, the water is supplied to the outside from the discharge part 2.

2 and 3 show an embodiment of the jet pump device according to the above, where 9 is a body, 10 is a suction passage, 24 is a main valve, and 39 is a relief passage to the discharge waterway 4. , 40 is a communicating pipe to the suction passage 10. That is, the jet pump section 5
is a nozzle 1 supplied with pressure water from a pressure waterway 3.
2, facing the nozzle 12, and the discharge side is the discharge waterway 4.
communicates with the suction port of the turbine pump section 1 via
The opposite side thereof has a first bench lily 13 and a second bench lily 17, which communicate with the check valve 6 via the suction passage 10, as a pressure increasing mechanism, and each of the water channels 3, 4 and the passage 10, It is formed within the body 9 that fixedly supports the nozzle 12, the first bench lily 13, and the second bench lily 17.

The portion where the pressure waterway 3 is bent to reduce its area is opened and closed by a main valve 24 made of rubber, for example, and the main valve 24 can be screwed in from the side of the body 22. Fixed by

The valve device 20 has the following configuration.

25 is a throttle, 26 is a case, 27 is a main valve back pressure chamber, 28 is a filter, 30 is a first diaphragm, 33 is a through hole, 34 is an operating valve, 35 is a cover,
36 is a second diaphragm, 37 is a pressure increasing chamber, and 38 is a bench lily front pressure chamber. The valve device 20 is attached to the jet pump body 9 with a gasket 2 by a bolt or the like.
1, and has a waterway coaxial with the pressure waterway 3 and the discharge waterway 4,
The second bench lily 17 is located on the same axis as the discharge waterway 4.

By the way, the valve device 20 has a partition wall 22 on the pressure waterway 3 side, a valve seat 23 is formed in the partition wall 22, and a main valve 24 faces the valve seat 23. The main valve 24 has a throttle 25 formed in a part of its valve shaft, and this throttle 25 is connected to the valve device 2.
It communicates with a main valve back pressure chamber 27 inside a case 26 fixed to the upper end of the main valve. The periphery of the valve shaft of the main valve 24 is covered with a filter 28 attached to cover the throttle 25. The upper end of the main valve 24 is supported by a first diaphragm 30 whose periphery is sandwiched between the case 26 and the base 29, and the base 29 is bolted via a packing 31 as is clear from FIG. 32 to the body of the valve device 20.

A through hole 33 is provided in the middle of the case 26,
The tip of the operating valve 34 faces the through hole 33 . The operation valve 34 is supported by a second diaphragm 36 whose peripheral edge is held between the upper end of the case 26 and the cover 35.
Due to the diaphragm 36, the space on the case 26 side becomes a pressure increasing chamber 37, and the space on the cover 35 side becomes a bench lily front pressure chamber 38. As is clear from FIG. 3, the pressure increase chamber 37 is communicated with the pressure increase chamber 16 of the jet pump 9 through a relief passage 39, so that the pressures thereof are made equal. Further, the vent lily front pressure chamber 38 is communicated with the suction passage 10 via the communication pipe 40 and the check valve 6, so that the pressures therebetween are made equal.

As is clear from FIG. 3, the valve device 20 is connected to the jet pump body 9 via the valve body 41.
It is fixed by a bolt or the like via the packing 20.

Such a jet pump device includes a filter 28
The operation is the same as the conventional example except for the related parts.

Thus, the throttle 25 is formed in a part of the valve shaft of the main valve 24, and the filter 28 is integrally attached to the main valve 24 so as to cover the throttle 25 around the valve shaft of the main valve 24. Therefore, the filter 28 moves together with the main valve 24, and foreign matter adhering to the filter 28 is peeled off by the impact when the main valve 24 opens and closes. This allows the filter 28
The cleaning will be done automatically and the clogging will be cleared. Further, since the movement of the main valve 24 is not hindered by the filter 28, there is no need to provide a gap between the main valve 24 and the filter 28. This prevents foreign matter from entering between the main valve 24 and the filter 28 and clogging the throttle 25, and prevents foreign matter from getting caught in this gap and causing the main valve 28 to become clogged.
Problems such as those that hinder the operation of step 4 can be resolved.

〔Effect of the invention〕

According to the present invention, foreign matter adhering to the filter 28 is peeled off by the impact when the main valve 24 opens and closes, so the filter 28 is automatically cleaned and its clogging can be eliminated. ,
Since there is no need to provide a gap between the main valve 24 and the filter 28, it is possible to eliminate clogging of the throttle 25, and furthermore, to provide a jet pump device that can prevent foreign objects from interfering with the operation of the main valve 24. can.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-sectional side view of a combination pump using the jet pump device of the present invention, FIG. 2 is a vertical cross-sectional side view of the same jet pump device, and FIG. 3 is a vertical cross-sectional front view of the same device. 1...Pump, 2...Discharge pipe, 3...Pressure waterway, 4...
Discharge waterway, 5...Jet pump section, 7...Suction pipe,
10... Suction passage, 12... Nozzle, 13... Bench lily, 20... Valve device, 23... Valve seat, 24... Main valve, 2
5... Throttle, 27... Main valve back pressure chamber, 28... Filter,
30...first diaphragm, 33...through hole, 34...operation valve, 36...second diaphragm, 37...pressure increase chamber,
38... Bench lily front pressure chamber, 39... Relief passage, 40
...Communication pipe.

Claims (1)

[Claims] 1 comprises a jet pump section 5 and a valve device 20 that is short-circuited and communicated with the jet pump section 5;
, the nozzle 12 and the bench lily 13, the nozzle 1
Consisting of a pressure waterway 3 that supplies pressure water to 2,
The valve device 20 is a main valve having an inlet side as a throttle 25 that communicates with the pressure waterway 3 and an outlet side as a through hole 33 that communicates with a pressure increase chamber 37 that communicates with a discharge waterway 4 having a lower pressure than the pressure waterway 3. Back pressure chamber 27, the aperture 2
5, a first diaphragm 30 that applies operating force to the main valve 24 in response to the pressure difference before and after the main valve 24; The valve 24, the vent lily front pressure chamber 38 communicating with the suction passage 10, and the second diaphragm 36 which responds to the pressure difference between the vent lily front pressure chamber 38 and the pressure intensifying chamber 37 open and close the through hole 33 by applying operating force. and an operating valve 34 that generates resistance from the pressure increasing chamber 37 to the discharge passage 4 side so that the pressure in the pressure increasing chamber 37 becomes slightly higher when the operating valve 34 is open than when the operating valve 34 is closed. In the configuration, the throttle 25 is formed in a part of the valve shaft of the main valve 24, and a filter 28 is installed around the valve shaft of the main valve 24 so as to cover the throttle 25. A jet pump device characterized by integrally attached.