JP3214543B2 - Filter device for pump device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box-shaped casing in which a pump, a gas-liquid separator, and a filter are housed, and a cylindrical member is provided in communication with a spiral chamber for guiding pressure oil from the pump. The present invention relates to a filter device of a pump device in which a filter is provided radially outward of a cylindrical member.

[0002]

2. Description of the Related Art Generally, a pump device for a weighing machine installed in a gas station or other gas station is composed of a box-shaped casing having an inlet and an outlet, and a pump and a gas-liquid separator are provided in the casing. A device, a filter, etc. are housed and configured as a unit.
-81480).

In such a pump device, filters are provided at an inlet and an outlet, respectively, so that foreign matter such as dust does not flow into the pump device and foreign matter generated in the pump device does not flow out.

Further, since pressurized oil from the pump contains bubbles, the oil containing light gas and liquid is removed by a gas-liquid separator, and heavy oil containing no gas and liquid flows out from the outlet. The present applicant has disclosed the technology described in
No., disclosed in the official gazette. However, in such a known technique, a spiral chamber is provided to generate a spiral flow, a tubular member is provided in connection with the spiral chamber, and a strainer is separately provided, so that the entire apparatus becomes large. Therefore, for the purpose of miniaturization, the present applicant has proposed Japanese Patent Application No. 7-140223.

Although the proposed prior art is effective in itself, it has been found from subsequent studies that the outflow side filter device can be further reduced in weight.

[0006]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a filter device which is made of a synthetic resin and which is lightweight and strong.

[0007]

According to the present invention, a pump, a gas-liquid separator, and a filter are housed in a box-shaped casing, and the cylindrical member is connected to a spiral chamber for guiding pressure oil from the pump. And a filter device of a pump device provided with a filter radially outward of the tubular member, the filter device comprising a first portion and a second portion molded of synthetic resin, and a first portion thereof. And a filter housed in the second portion, wherein the first portion is integrally formed with the tubular member, the flange extending radially outward, and the tubular member extending from the radially outer end of the flange. A plurality of vertical ribs extending in parallel to the axis of, a ring-shaped horizontal rib connecting the vertical ribs, and a first connection rib connecting the ends of the vertical ribs in a ring shape, and the second portion is Cover that extends radially outward and its cover A plurality of vertical ribs extending from a radially outer end of the cylindrical member in parallel with the axis of the cylindrical member, a plurality of ring-shaped horizontal ribs connecting the plurality of vertical ribs, and a second provided at an end of the vertical ribs. And a first connecting rib and a second connecting rib are detachably connected to each other by a protrusion and a recess, one of which is overlapped with the other, and one end of the filter device is provided with a spring. The other end is seated on the seat surface by being pressed by, and when clogging occurs, it moves against the spring and the liquid pressure in the filter is configured to flow out to the pump inlet side through the flow path. I have.

According to the present invention, the cover of the second portion is provided with a guide member, and the lid attached to the casing is provided with a cylinder for guiding the guide member. The spring is pressed between the outer lid and the cover.

[0009]

[0010]

FIG. 1 shows a pump device to which a filter device embodying the present invention is applied. An inflow port I and an outflow port O are formed in a box-shaped casing, which is generally designated by reference numeral C, and the inflow port I is connected to a cylindrical inflow-side filter chamber 1. Accommodates the inflow-side filter 2. The inflow-side filter chamber 1 communicates with the flow path 7 on the inlet side of the pump 6 via the check valve 5, and the flow path 8 on the outlet side of the pump 6 communicates with the tangential direction of the spiral chamber 10. I have. The spiral chamber 10 has a cylindrical shape and communicates with a flow path 20 formed in the casing C via a small hole 13 a provided in one wall surface 13 of the spiral chamber 10. The other wall surface of the spiral chamber 10 communicates with the filter chamber 17 on the outflow side via the tubular member 11. The gas-liquid separation device includes the spiral chamber 10, the cylindrical member 11, a small hole 13a for outflow of the gas-liquid mixed flow, and a filter 14 described later.

The filter chamber 17 is formed in a cylindrical shape and communicates with the outlet O through a control valve 18. The lower part of the filter chamber 17 has a flow through the bypass valve 19 on the inlet side of the pump 6. It is in communication with Road 7. A filter 14 is provided in the filter chamber 17, and the cylindrical member 11 is integrally formed on one flange 12 b of the filter 14 concentrically with the filter 14. And the other end is closed by a cover 12a,
The cover 12a is provided with a cylindrical guide 40. A lid 15 is detachably provided on the casing C facing the guide 40 by, for example, a bolt.
A cylindrical body 41 for slidingly guiding the guide 40 is provided inside the lid 15. The lid 15 is provided outside the cylindrical body 41.
The spring 16 is pressed between the cover and the cover 12a, so that the end of the flange 12b is seated on the seat surface formed on the casing C.

On the opposite side of the spiral chamber 10 from the filter chamber 17, a flow path 2 communicating with a small hole 13a for outflow of a gas-liquid mixed flow is provided.
0 communicates with the float chamber 21 and the float chamber 2
1 is a float valve 2 that opens when oil accumulates to level L
2 is provided, and an air vent V is provided above the level L thereof. The outlet channel 23 of the float chamber 21 communicates with the inflow-side filter chamber 1. In addition,
Reference numeral 25 denotes a lid for closing an opening for mounting the check valve 5.

In this device, oil from an underground tank (not shown) flows into the pump device from an inflow port I, foreign matter such as dust is removed by an inflow-side filter 2, and flows from a filter chamber 1 through a check valve 5. It is sucked into the pump 6 from the passage 7. The oil pressurized by the pump 6 flows into the swirl chamber 10 from the flow path 8 to generate a swirling flow, and the gas-liquid mixture having a relatively low specific gravity flows into the float chamber 21 from the small hole 13a through the flow path 20. . Then, the oil which does not contain gas having a relatively heavy specific gravity passes through the filter 14 on the outflow side to the filter chamber 17, pushes the control valve 18 open, flows to the outlet O, and is supplied from an oil supply nozzle (not shown). On the other hand, when the pump 6 operates and oil is not supplied, the oil is returned from the filter chamber 17 to the flow path 7 on the inlet side of the pump 6 through the bypass valve 19. The gas-liquid mixed flow flowing into the float chamber 21 is separated into a gas and a liquid here, and the gas is discharged from the air vent V. When the amount of oil in the float chamber 21 exceeds the level L, the float valve 22 opens and returns to the inflow-side filter chamber 1.

When the filter 14 is clogged, the cylindrical member 11, the cover 12a, the flange 12b, the filter 14
The filter device is moved to the left in the drawing against the spring 16, the hydraulic pressure in the filter 14 escapes through the flow passage 36 to the flow passage 7 on the inlet side of the pump 6, and oil containing foreign matter flows out of the outlet 6. O does not flow out. For this purpose, the cover 12 is provided with a guide member 40, while the lid 15 is provided with a cylindrical body 41 for guiding the guide member 40.

In the present invention, the above-mentioned filter device is made of a synthetic resin to reduce the weight. The embodiment will be described with reference to FIGS.

The filter device, generally designated F, comprises a filter 14, a first portion F1, and a second portion F2. The first portion F1 includes a tubular member 11 at the center, and a flange 12b that extends radially outward from near the end of the tubular member 11 is provided. The flange 1
A plurality of vertical ribs 50 extend in the axial direction of the cylindrical member 11 from the radial outer end of 2b, and a plurality of ring-shaped horizontal ribs 51 connecting the vertical ribs 50 are provided. The ends terminate in first connecting ribs 52.
Therefore, it has a cylindrical shape as a whole.

The second part F2 is composed of the first part F1
Similarly, the guide member 40 is moved from the radial outer end of the cover
Vertical ribs 53 and horizontal ribs 5 extending in the axial direction of
4 and the second connecting rib 55 are formed in a cylindrical shape.

As shown in FIG.
When the first part F1 and the second part F2 are connected to each other, they are accommodated therein.

To detachably connect the first connecting rib 52 of the first portion F1 and the second connecting ring 55 of the second portion F2, one (first connecting rib in the illustrated example) is used. Includes a cylindrical fitting portion 52a and a protruding portion 52b forming a stopper, and the other (second connecting rib in the illustrated example).
Is an inner part 55 engaged with the tip of the fitting part 52a.
a and an outer portion 55b fitted radially outward of the fitting portion 52a, and one (first connecting rib) is provided with a fastening projection 56, while the other (first connecting rib) is provided with The second connection rib) has a recess 57 into which the protrusion 56 is fitted.

Therefore, the filter 14 is connected to one part F
1 and F2, and the other portion F2 or F1 is placed over the filter 14 so that the first and second connecting ribs 5
The filter device is completed by engaging the protrusions 2 and 55 with each other and fitting the protrusions 56 and the recesses 57.

The filter device constructed as described above can sufficiently pass the oil from the space surrounded by the vertical ribs and the horizontal ribs, and can be made robust by the ribs. Can be made. In addition, the filter itself also serves as a reinforcing material,
A lightweight filter device can be obtained.

[0022]

As described above, according to the present invention, a lightweight and durable filter device can be obtained by using a synthetic resin. Further, since the first portion and the second portion are detachable, the filter can be easily taken out or replaced, and the molding operation is also easy. The configuration of the vertical ribs and the horizontal ribs can provide both oil passage, filter holding, and robustness.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a pump device embodying the present invention.

FIG. 2 is an enlarged sectional view of a filter device embodying the present invention.

FIG. 3 is an exploded perspective view of the filter device shown in FIG. 2;

[Explanation of symbols]

 Reference Signs List 6 pump 10 spiral chamber 11 tubular member 12a cover 12b flange 14 filter 50, 53 vertical rib 51, 54 horizontal rib 52 ... First connecting rib 52a. ... concave part F1 ... first part F2 ... second part

Continuation of the front page (56) References JP-A-5-193697 (JP, A) JP-A-56-125503 (JP, U) JP-A-63-103709 (JP, U) (58) Fields investigated (Int) .Cl. ⁷ , DB name) F04B 53/20 B01D 29/11 B01D 35/02 F04B 39/16 F04C 15/00

Claims (2)

(57) [Claims] A vortex for accommodating a pump (6), a gas-liquid separator (10, 11, 13a) and a filter (14) in a box-shaped casing (C), and for guiding pressure oil from the pump (6). In a filter device of a pump device provided with a tubular member (11) in communication with the chamber (10) and a filter (14) provided radially outward of the tubular member (11), the filter device (F) Is a first portion (F
1) and a second part (F2) and a filter (14) housed in the first part (F1) and the second part (F2), and the first part (F1) Is formed integrally with the tubular member (11), and has a flange (12b) extending radially outward, and a plurality of flanges extending from the radially outer end of the flange (12b) in parallel to the axis of the tubular member (11). The vertical ribs (50), the ring-shaped horizontal ribs (51) connecting the vertical ribs (50), and the first connecting ribs (52) connecting the ends of the vertical ribs (50) in a ring shape. The second portion (F2) includes a cover (12a) extending radially outward, and a plurality of vertical ribs (F2) extending from a radially outer end of the cover (12a) parallel to the axis of the tubular member (11). 53) and a plurality of ring-shaped horizontal ribs connecting the plurality of vertical ribs (53). And 54), their longitudinal ribs (5
3) a second connecting rib (55) provided at the end of
The first connecting rib (52) and the second connecting rib (55)
One is superimposed on the other and is detachably connected by a projection (56) and a recess (57), and one end of the filter device (F) is pressed by a spring (12) and the other end is When clogging occurs, the user moves against the spring (12) and the hydraulic pressure in the filter (14) passes through the flow path (36) and the pump (6).
A filter device for a pump device, which is configured to flow out to an inlet side. 2. The cover (12a) of the second part (F2).
Is provided with a guide member (40), and the lid (15) attached to the casing (C) is provided with the guide member (40).
(41) is provided, and the cylinder (41)
The filter device according to claim 1, wherein the spring (16) is pressed between the outer lid (15) and the cover (12a).