JPH0921386A - Water absorption strainer for pump device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realiz a service for a long period without requiring the frequent washing, by reducing the clogging of a filter. SOLUTION: A filter 3 having a tube form, a casing 1 partitioning a round passage 4 on the outer periphery of the filter 3, a water suction port 51 to take in the water along the round passage 4, and a pump connecting hole opening on the inner peripheray of the filter 3 are provided. Relatively large refuse can be removed at the former stage of the filter 3, by the centrifugal separating function of the round passage 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is mainly applied to a high-pressure water jet type washing machine for civil engineering and construction, a high-pressure water jet type dismantling work machine for the same, and removes foreign matters such as earth and sand on the water supply side of a pump device. The present invention relates to a water absorbing strainer for a pump device.

[0002]

2. Description of the Related Art In recent years, when cleaning or dismantling a building such as a house or a building, a high pressure water jet type washing machine which jets high pressure water by a pump device in order to prevent generation of dust which causes pollution Is attracting attention.

By the way, as a water source for pumping water to the pump device, especially when demolishing a building destroyed by the earthquake, it is difficult to obtain fresh water such as tap water, so that rivers, lakes and marshes and water storage tanks are used. To be done. Since the water contains foreign matter such as dust and earth and sand, it is connected to the pump apparatus in order to prevent the foreign matter from being pumped up by the pump apparatus together with the water and damaging its internal equipment. A strainer is installed on the inlet side of the water absorption hose.

As such a strainer, conventionally,
As shown in FIG. 6, a cylindrical core member B for connecting a water supply hose F to the pump device is fitted to the base member A, and the outer peripheral portion of the core member B is engaged and locked. A cylindrical filter D is attached between the cover C and the base member A, and a plurality of pump connection ports E are opened below the core member B inside the filter D. G is a filter D
Is a spacer member for retaining the shape.

Then, the entire strainer is put into a water source and a pump device is driven to separate and filter foreign matters such as dust and earth and sand contained in the water of the water source with a filter D,
Only clean water is pumped to the pump device through the connection port E, the core member B, and the water absorption hose F, and high-pressure water is jetted from the pump device toward the building to be disassembled.

[0006]

However, since the above-mentioned conventional strainer has a structure in which the water of the water source is directly introduced into the filter D, foreign matter adheres to the outer peripheral surface of the filter D to cause clogging. Therefore, the filter D cannot be used at an early stage. Therefore, it was necessary to frequently clean the filter D.

An object of the present invention is to provide a strainer in which clogging of the filter is reduced and which can be used for a long period of time without requiring frequent cleaning work.

[0008]

In order to achieve the above object, a water absorption strainer of the present invention comprises a filter 3 having a cylindrical shape, a casing 1 defining a circulation passage 4 at an outer peripheral portion of the filter 3. The water intake port 51 that takes in water along the circulation passage 4 and the pump connection port 21 that opens to the inner peripheral portion of the filter 3 are provided.

[0009]

The water of the water source taken into the casing 1 through the water suction port 51 is circulated in the circulation passage 4 defined between the casing 1 and the filter 3 while passing through the pump connection port 21 in the filter 3. Pumped up to the pump side. When the water circulates in the circulation passage 4, the relatively large foreign matter contained in the water is separated and removed radially outward by the centrifugal force due to the circulation. In this way, the water with less foreign matter is supplied to the filter 3, so that the filter 3 can be less clogged and can be used for a long period of time without requiring frequent cleaning work. Moreover, since the foreign matter contained in the water is separated and removed in two steps, that is, when advancing through the circulation passage 4 and when passing through the filter 3, the foreign matter contained in the water can be favorably prevented from being pumped up to the pump side. It is possible to favorably prevent damage accidents due to foreign matter.

[0010]

FIG. 5 shows an example in which the water absorption strainer S according to the present invention is applied to a high-pressure water jet type washing machine or a dismantling work machine. In the embodiment shown in FIG.
Using a mobile pump unit U having a water pump, a water suction hose H1 is connected to the water suction side of a pump P installed in the pump unit U, and the water injection type strainer S is attached to the tip of the water suction hose H1. The water supply hose H2 is provided on the water discharge side of the pump P while being placed in the T position.
Is connected, and the injection nozzle N is attached to the tip thereof. M
Is a drive source such as a motor or engine, and Q is a pressure gauge.

As the pump P is driven, the water in the tank T is pumped to the pump P via the strainer S and the water suction hose H1, and the pumped water is discharged to the water discharge hose H.
By ejecting from the tip of the injection nozzle N toward the building to be dismantled, for example, through 2, the dismantling work is performed while preventing the generation of dust.

The pump unit U includes an unloader valve R, the valve R is opened to the tank T via a spillage hose H3, and excess water of the pump P is unloader valve R and a spillage hose H3. After that, the water can be discharged to the water storage tank T.

The submersible strainer S is shown in FIGS.
As shown in FIG. 3, a cylindrical casing 1 and the casing 1
A tubular core member 2 which is detachably erected upright in the center of the, and has a plurality of pump connection ports 21 provided slightly in the middle and slightly upward.
Water absorption that takes in water along a tubular filter 3 formed of a mesh or the like arranged around the pump connection port 21 of the core member 2 and a circulation passage 4 defined between the casing 1 and the filter 3. It is composed of a generally L-shaped introduction tube 5 having a mouth 51.

More specifically, the casing 1 is provided with a cylindrical member 11 having upper and lower ends opened in order to facilitate assembly and disassembly when cleaning the filter 3 and the like, and the cylindrical member 11. A base member 12 fitted by being fitted to the lower end side of 11, and an upper cover fitted to the upper end side of the cylindrical member 11 by being fitted so as to face the base member 12 and having an insertion hole 13a for the middle core member 2 at the center. It is formed from 13. A bulging portion 12a that bulges upward is integrally formed on the base member 12, and a screw body 14 is fixed to the upper center side of the bulging portion 12a in an embedded manner, and the center core member is formed. At the top of 2,
The upper cover 13 is integrally provided with a flange portion 22 that abuts around the insertion hole 13a, and the insertion hole 13 of the cover 13 is provided.
The core member 2 is inserted from a, and the screw portion 23 formed at the tip of the core member 2 is screwed into the screw body 14 in a state in which the flange portion 22 is pressed against the insertion hole 13a. By doing so, the base member 12 and the cover 13 are press-fitted and fixed to the upper and lower portions of the cylindrical member 11.

The cylindrical member 11 may be formed of a transparent synthetic resin plate other than a stainless plate or the like. When the cylindrical member 11 is formed of such a transparent plate, the clogging state of the filter 3 can be easily confirmed from the outside. be able to.

Further, in each of the embodiments shown in the drawings, a plurality of shape-retaining ribs 1 for contacting the lower inner peripheral surface of the cylindrical member 11 on the outer periphery of the base member 12 and retaining the shape of the cylindrical member 11.
2b is integrally formed.

The base member 12 is made of synthetic resin or the like, and a weight 15 is insert-molded inside the base member 12 during the molding so that the strainer S can be easily submerged in the bottom of the water storage tank T. .

Further, the introduction pipe 5 is attached to the upper cover 13, and the water intake port 51 of the introduction pipe 5 is located on the upper side of the circulation passage 4 and the water absorption port 51 is circulated. The cover 13 is attached to the outside in the radial direction so as to be directed tangentially to the passage 4.

Further, the filter 3 is provided with a cylindrical wall surface 31 opposed to the inner wall surface of the cylindrical member 11 via the circulation passage 4, and the filter 3 is provided inside the casing 1 with the core member. It is arranged on the outer periphery of the water suction port 21 in FIG. Specifically, a disc-shaped support plate 6 is fixed by a retaining ring 61 to an intermediate portion in the vertical direction of the core member 2, and the filter 3 is supported between the support plate 6 and the upper cover 13. . That is, the upper cover 13
A plurality of shape-retaining ribs 7 are integrally formed on the lower side and the upper side of the support plate 6. Filter 3 with a plurality of shape retaining ribs 7
And the cylindrical wall surface 31 is opposed to the inner wall surface of the cylindrical member 11, the entire filter 3 is supported by the core member 2 in a suspended manner.

A connecting member 8 is screwed onto the upper side of the core member 2, and a suction hose H1 reaching the pump P is connected through the connecting member 8.

Next, the operation of the submersible strainer S having the above structure will be described. For example, when spouting water on a building to be dismantled, the strainer S is put into the water storage tank T to pump the pump P of the pump unit U.
By driving, the water containing the foreign matter in the tank T is introduced into the casing 1 from the water inlet 51 of the introduction pipe 5.

Water containing foreign matter is introduced tangentially to the circulating passage 4 provided between the casing 1 and the filter 3, as shown by the arrow A in FIGS. 2 and 3. The water absorption hose H1 passes through the cylindrical wall surface 31 of the filter 3 and is admitted from each connection port 21 provided in the core member 2 while advancing in the spiral passage 4 as a spiral vertical swirl flow.
It is pumped up to the pump P via the water, and is jetted from the tip of the nozzle N toward the building to be disassembled via the water discharge hose H2 connected to the pump P.

When the water introduced into the casing 1 is advected in the circulation passage 4, most of the foreign matters contained in the water are radially outward by the centrifugal force as shown by the arrow B in FIG. Separated and removed, and the foreign matter separated and removed is
It is stored on the base member 12 along the inner wall surface of the cylindrical member 11 in the casing 1. Further, the water from which most of the foreign matters have been separated and removed is supplied to the cylindrical wall surface 31 of the filter 3 as shown by the arrow C in FIG. 3, and therefore, the clogging of the cylindrical wall surface 31 can be reduced. Therefore, it can be used for a long period of time without requiring frequent cleaning work. In addition, the foreign matter contained in the water is 2 when advancing through the circulation passage 4 and when passing through the filter 3.
Since the foreign substances are separated and removed in stages, it is possible to favorably prevent foreign substances from being pumped up by the pump P together with water, and it is possible to reliably prevent the internal equipment of the pump P from being damaged by the foreign substances. .

Further, when the filter 3 becomes dirty and the cleaning work or the replacement work is performed by continuously performing the above work for a long period of time, the thread portion 23 of the core member 2 is screwed while being screwed. The screw body 1 of the base member 12
By removing the core member 2, the upper cover 13 and the filter 3 from the base member 12 and the cylindrical member 11 side, the retaining ring 61 can be removed. Also, the filter 3 can be easily disassembled from the core member 2, which facilitates cleaning and replacement work of the filter 3. After these operations, the screw portion 23 of the core member 2 is screwed into the screw body 14 again, so that the core member 2 and the upper cover 1 are attached to the base member 12 and the cylindrical member 11 side.
3 and the filter 3 can be easily assembled.

In the above embodiments, the submersible strainer S was described, but the strainer S of the present invention may be installed on the ground. In this case, as shown in FIG. 4, the submersible hose H4 is connected to the upper side of the introduction pipe 5 and the inside of the casing 1 is kept airtight, that is, the base member of the cylindrical member 11 thereof. 12, a fitting portion for the cylindrical member 11, a fitting portion for the upper cover 13 of the cylindrical member 11, an insertion portion between the insertion hole 13a of the cover 13 and the core member 2, and an insertion portion of the introduction pipe 5 for the cover 13, respectively. By interposing the ring 9, the inside of the casing 1 is made airtight.

Then, for example, when water is jetted to the building to be demolished, the entire strainer S is installed on the ground, the hose H4 is put into water, and the pump P is driven to drive the hose H4. The water is pumped from the inlet to the introduction pipe 5, and thereafter, the water is introduced into the casing 1 from the water inlet 51 of the introduction pipe 5 in the same manner as described above.

As described above, when the strainer S is installed on the ground, the hose H4 connected to the introduction pipe 5 is used.
Since only the strainer S needs to be put into the water, the loading work can be performed more easily and labor-savingly than the case where the entire strainer S is put into the water. It is convenient when using water such as lakes as a water source. In the above, as an example of the use of the strainer S, the case of ejecting water to the building to be dismantled has been described, but the strainer S ejects high-pressure water while removing foreign matter in the water. It can be used as it is for such purposes.

[0028]

As described above, in the strainer of the present invention, the relatively large foreign matter contained in the water from the water source is
Due to the centrifugal force associated with the circulation in the circulation passage 4, the water separated and removed in the radial direction can be supplied to the filter 3, so that clogging of the filter 3 can be reduced and frequent cleaning work can be performed. Can be used for a long period of time without needing to do so, and since foreign matter contained in water is separated and removed in two stages, during advection of the circulation passage 4 and when passing through the filter 3, it is possible to remove it on the pump side. It is possible to favorably prevent foreign matter from being pumped up, and it is possible to favorably prevent damage accidents due to foreign matter on the pump side.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a water absorption strainer according to the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

3 is a sectional view taken along line YY of FIG.

FIG. 4 is a sectional view showing another embodiment.

FIG. 5 is an explanatory diagram showing a usage example of the strainer.

FIG. 6 is a sectional view showing a conventional example.

[Explanation of symbols]

 1 ... Casing 21 ... Pump connection port 3 ... Filter 4 ... Circulation passage 51 ... Water inlet

Claims (1)

[Claims] 1. A filter (3) having a cylindrical shape, a casing (1) defining a circulation passage (4) at an outer peripheral portion of the filter (3), and water taken in along the circulation passage (4). A water absorbing strainer for a pump device, comprising a water inlet (51) and a pump connecting port (21) opening to the inner peripheral portion of the filter (3).