KR100198062B1 - Float valve for pump - Google Patents

Abstract

It is an object of the present invention to provide a float valve that is lightweight and easy to assemble.

In order to achieve the above object, the present invention is rotatably mounted to the float portion 30, the support portion 32 for rotatably supporting the stem portion 31 of the float portion, and the stem portion 31. It becomes the valve part 33, they are all formed from synthetic resin, and the stem part 31 consists of a pair of plate-shaped objects 37a and 37b, and the 1st lag 39a, which is provided in the plate-shaped objects 37a and 37b, 39b is fitted into the holes 48a and 48b of the plate members 47a and 47b of the support part 32, and the second lags 40a and 40b are fitted into the holes 52 of the valve section 51. Float valve.

Description

Float Valves for Pump Units

The present invention relates to a float valve installed in a float chamber of a pump device and opened when a predetermined amount of oil is stored in the float chamber.

In general, a pump device for a meter installed at a gas station such as a gasoline stand includes a pump, a gas-liquid separator, a gas-liquid separation chamber, etc. in a box-type casing, as described in, for example, Japanese Patent Application Laid-Open No. 60-81480. The built-in unit is in use. An air vent pipe for discharging the separated gas is connected to the gas-liquid separation chamber, and a float valve is provided inside the gas-liquid separation chamber. When a predetermined amount of liquid is stored in the gas-liquid separation chamber, the liquid flows to the pump side. The present applicant has also proposed a technique described in Japanese Patent Application Laid-Open No. 1-176878 as a float valve of this kind.

However, since the float valve device having the conventional float is made of metal, there is a concern that the weight is heavy and the malfunction is caused by rust or the like.

It is therefore an object of the present invention to provide a float valve of a pump device that is lightweight and free of rust.

According to the present invention, in a float valve installed in a float chamber of a pump device and opened when a predetermined amount of oil is stored in the float chamber, a support portion pivotably supports the float portion and the stem portion of the float portion, and the stem portion can be rotated. It is configured as a valve portion connected to each other, all of them are formed of a synthetic resin, the stem portion is composed of a pair of plate-shaped body and their plate-shaped body is provided with a first lag projecting outward, a second lag projecting inward, The support portion is a main body portion having a flange and a valve seat secured to a casing, and a pair of plate-shaped members extending from the main body portion, the plate-shaped member is provided with a hole into which the first lag is fitted, and the valve portion is provided. It is provided between the valve body, the main body, and the valve, and there is provided a hole in which the second lag is fitted. There.

According to the present invention, the float portion is formed into a hollow sphere by melting the first float portion and the second float portion.

And according to this invention, the plate-shaped member of a support part is each formed in the concave part from an upper part to a hole, and the concave part becomes the taper shape which becomes thicker as it gets closer to a hole.

According to the present invention, the main body portion of the support portion is provided with a valve seat on which the valve body rests, and a guide for guiding the valve is provided around the valve seat so that the flow path from the valve sheet communicates with the flow path provided in the casing.

In addition, according to the present invention, the main body of the valve portion is formed of a relatively hard synthetic resin and the valve portion melted on the main body is formed of a relatively soft synthetic resin.

Further, according to the present invention, the hole between the valves to which the second lag is fitted is flat on the main body side, and the opposite side thereof is arcuate, and is formed as a long hole in the axial direction between the valves with respect to the second lag.

Thus, it is made of synthetic resin, so it is light in weight and is easy to assemble without fear of rust.

1 is a cross-sectional view of a pump device to which the present invention is applied.

2 is a side view showing a float valve according to the present invention.

3 is a side view showing the float in accordance with the present invention in a partial cross section;

4 is a plan view of FIG.

5 is a plan view of a support portion of the present invention.

6 is a side view of FIG.

Figure 7 is a side view showing the valve portion of the present invention in a partial cross section.

8 is a plan view of FIG.

* Explanation of symbols for main parts of the drawings

C: Casing 1: Strainer Room

6: pump 20: euro

21: float chamber 22: float valve

23: euro 30: float portion

31 stem portion 32 support portion

33: valve portion 35: first float portion

36: 2nd float part 37a, 37b: plate-shaped object

38a, 38b: rib 39a, 39b: first lag

40: main body 40a, 40b: second lag

42: flange 43a, 43b: bolt hole

44: main body 45: valve seat

46: flow path 47a, 47b: plate member

48a, 48b: hole 49a, 49b: recess

51: valve 52: hole

53: valve body 54: protrusion

First, in order to better understand the present invention, a pump device according to the present invention will be described with reference to FIG.

In FIG. 1, the inlet I and the outlet 0 are formed in the box-shaped casing C, and the inlet I has a cylindrical inlet-side strainer chamber 1 successively passing through the inlet I. The inlet side strainer 2 is accommodated in the strainer chamber 1. The inlet side strainer chamber 1 communicates with the inlet side flow path 7 of the pump 6 with the check valve 5 interposed therebetween, and the flow path 8 at the outlet side of the pump 6 is the vortex chamber. It communicates in the tangential direction of (10). The vortex chamber 10 is cylindrical and communicates with the flow path 20 formed in the casing C with the small hole 13a provided in the wall surface 13 on one side thereof. The wall surface on the other side of the vortex chamber 10 communicates with the strainer chamber 17 with the cylindrical member 11 therebetween. The gas-liquid separator is constituted by the vortex chamber 10, the cylindrical member 11, the small hole 13a for outflow of the gas-liquid mixed fluid, and the strainer 14 described later.

The strainer chamber 17 is formed in a cylindrical shape and communicates with the outlet port 0 with the control valve 18 interposed therebetween, and the lower portion of the strainer chamber 17 with the bypass valve 19 interposed therebetween. Is communicated with the flow path 7 on the inlet side. A strainer 14 is provided in the strainer chamber 17, and the cylindrical member 11 is formed concentrically with the strainer 14 in the flange 12b on one side of the strainer 14, and the other end thereof is It is closed by the lid body 12a. In addition, the lid 15 is provided on the outer side of the casing C so that the lid 15 can be attached and detached by a bolt (not shown), and the spring 16 is elastically disposed between the lid body 12a of the strainer 14 at the opposite position. The flange 12b on the opposite side is seated on the seating surface formed in the casing C. As shown in FIG.

On the opposite side of the strainer chamber 17 of the vortex chamber 10, a small hole 13a for outflow of the gas-liquid mixed fluid is provided, and the flow path 20 communicating with the small hole 13a is the float chamber 21. In the float chamber 21 is provided with the float valve 22 which opens a valve when oil fills up to the level L. As shown in FIG. The present invention relates to a float valve provided in this float chamber 21. Moreover, the air vent (V) is provided above the level (L). The outlet flow passage 23 of the float chamber 21 communicates with the inflow side strainer chamber 1. Reference numeral 25 denotes a lid for closing the upper opening formed for attaching the check valve 5.

A space 35 is formed at an end portion of the tubular member 11 at the vortex chamber side, and the space 35 communicates with the flow passage 7 at the inlet side of the pump with the flow passage 36 interposed therebetween. When the strainer 14 is blocked, it moves to the left side in the drawing against the spring force of the spring 16. In order to guide the cover 12a, a cylindrical guide 40 is provided and the outside of the casing C. The lid 15 is provided with a cylinder 41 for guiding the guide portion 40.

Therefore, when the pump 6 rotates, oil is introduced into the strainer 2 from the inlet port I by the suction force, and the oil filtered from the strainer 2 is opened by pressing the check valve 5 to open the flow path 7 Enters the pump (6). The discharge oil discharged from the pump (6) enters the vortex chamber (10) from the flow path (8), where swirling flow (vortex) occurs, and heavy oil that does not contain bubbles has a radially outer strainer from the cylindrical member (11). It flows into the strainer chamber 17 through 14 and flows out of the outlet 0 through the control valve 18.

On the other hand, the light oil containing many bubbles collects in the center and flows into the float chamber 21 through the passage 20 from the small hole 13a. The reason why this light oil flows into the small hole 13 is disclosed in Japanese Patent Laid-Open No. 5-193697 proposed by the present applicant, and thus a detailed description thereof will be omitted.

In the float chamber 21, oil and air bubbles are separated, and vapor (vapor) is discharged from the air vent V to the atmosphere. When a certain amount of oil is filled in the float chamber 21, the float valve 22 passes through the passage ( The oil in the float chamber 21 is sucked from the strainer chamber 1 to the pump 6 by opening 23. In FIG. 1, the flow path 23 is deformed for clarity.

The float valve which implemented this invention is demonstrated with reference to FIG. 2 below.

And the float valve concerning this invention is all made from artificial material, ie, synthetic resin.

The float valve which shows the whole by the code | symbol 22 in FIG. 2 supports the float part 30, the stem part 31 which supports the float part 30, and the stem part 31 so that rotation is possible. It is comprised as the valve part 33 supported by the support part 32 and the stem part 31, and opening and closing the flow path 23. As shown in FIG.

The float portion 30 is divided into the first float portion 35 and the second float portion 36, as shown in FIGS. 3 and 4, to form the flange portions F1 and F2 of both divided pieces after molding. It consists of a hollow spherical body formed by melting and attaching it integrally. Thus, by melt | dissolving and attaching two parts, a hollow body can be easily formed from synthetic resin.

The stem portion 31 is composed of a pair of plate members 37a and 37b firmly attached to the second float portion 36 by, for example, melting and adhering, and these plate members 37a and 37b are ribs, respectively. It is reinforced with (38a, 38b). A pair of first lags 39a and 39b are provided on the outer side near the tip of the plate-shaped bodies 37a and 37b so as to be able to pivotally rotate to the support part 31 as will be described later. On the float portion 30 side of 39b), a pair of second lags 40a and 40b to which the valve portion 33 described later is rotatably mounted are provided to protrude inward.

The support part 32 is equipped with the flange 42 for attaching to the casing C, as shown to FIG. 5, FIG. 6, and the flange 42 has the bolt hole 43a attached to the casing C, 43b). The main body portion 44 integrally formed with the flange 42 is formed with a valve seat 45 of the valve portion 33 to be described later, and a flow passage 46 extending from the valve sheet 45 is provided with the flange 42. It is formed, and this flow path 46 communicates with the flow path 23 which reaches the said strainer chamber 1 formed in the casing C. As shown in FIG. A pair of plate members 47a and 47b protrude from the main body portion 44, and the first lags 39a and 39b are fitted into holes near the distal ends of these plate members 47a and 47b. 48a, 48b) are installed. As shown in FIG. 2 and FIG. 5, the pair of plate members 47a and 47b have a suitable number of guides G1 to G4 for guiding the valve portion 33 (four in the illustrated example). It is provided around the valve seat 45. In addition, recesses 49a and 49b for guiding the first lags 39a and 39b from the top portions of the plate members 47a and 47b to be inserted into the holes 48a and 48b are provided. The concave portions 49a and 49b have a tapered shape in which the thickness of the plate member becomes thick in the downward direction in FIG. Therefore, the first lags 39a and 39b can be easily fitted into the holes 48a and 48b, respectively, and the first lags 39a and 39b which are integrally fitted to each other do not fall off the working column.

As shown in Figs. 7 and 8, the valve portion 33 is made of a relatively hard synthetic resin, for example, a cylindrical body 50 made of PPS, and the valve section 51 extends from one end surface thereof. In the vicinity of the tip, a hole 52 is formed which is fitted with the second lags 40a and 40b. As shown in the figure, the hole 52 has a straight line with a flat edge 52a on the main body 50 side, an edge 52b on the opposite side thereof with a circular arc shape, and the diameter of the second lags 40a and 40b. A long hole is formed in the axial direction of the valve section 51. On the other side thereof, a valve body 53 made of a relatively soft material such as, for example, fluororesin, is integrally attached by, for example, melting. In the vicinity of the outer circumference of the valve body 53, a ring-shaped protrusion 54 is formed to engage with the valve seat 45.

Therefore, the flange 42 of the support part 32 is attached to the predetermined position of the casing C by the bolt B (FIG. 2), and the flow path 46 of the support part 32 and the flow path 23 of the casing C are attached. ), And the second lags 40a and 40b are fitted into the holes 52 of the valve sections 51 by widening the pair of plate-shaped bodies 37a and 37b of the stem 31. In this way, since the valve part 33 is attached using the elasticity of synthetic resin, its work can be performed by what is called one-touch.

Then, the first lags 39a and 39b coincide with the concave portions 49a and 49b of the plate members 47a and 47b of the support portion 32, and they are pressed toward the holes 48a and 48b and their first lags 39a and 39b. ) Is inserted into the holes 48a and 48b, respectively.

In this way, the float valve 22 shown in FIG. 2 is completed. In FIG. 1, when the oil surface L rises, the float part 30 rotates counterclockwise around the first lags 39a and 39b in FIG. 2. Thus, the valve body 53 The oil flows away from the valve seat 45 into the flow path 46.

And when the oil surface L descends, it operates in reverse to the above, and the flow path 46 is closed.

The valve body 53 is guided by the guides G1 to G4, but a certain amount of flow (shake) is required in order to smooth the operation. Therefore, the edge 52a of the hole 52 is a flat straight line, and the valve part 33 has the degree of freedom in a horizontal direction, and it prevents sealing property from being impaired.

As described above, the present invention brings the following excellent effects.

(a) Since the float valve is made of synthetic resin, it is lightweight and has no malfunction due to rust.

(b) Using the elasticity of the synthetic resin to attach the stem or valve by the lag and the hole so as to be able to rotate, the assembly work is simple and there is no fear of dropping out during operation.

(c) Since it is a synthetic resin, it is sufficiently sealed without the use of packings.

Claims (6)

A float valve installed in a float chamber of a pump apparatus and opened when a predetermined amount of oil is stored in a float chamber, the float being connected to a support portion for supporting the stem portion of the float portion so as to be rotatable, and the stem portion rotatably connected thereto. It is configured as a valve portion, all of them are formed of a synthetic resin, the stem portion is composed of a pair of plate-shaped body and their plate-shaped body is provided with a first lag projecting outward, a second lag projecting inward, the support portion Is a flange portion firmly attached to the casing, a main body portion having a valve seat, and a pair of plate-shaped members extending from the main body portion, and the plate-shaped member is provided with a hole into which the first lag is fitted. A valve body and a valve, and holes between the valves are rotatably engaged with the second lag. Float valve for pumping equipment. The float valve according to claim 1, wherein the float portion is formed into a hollow sphere by abutting and melting the divided pieces composed of the first float portion and the second float. 2. The float valve according to claim 1, wherein each of the plate-shaped members of the support portion is provided with a concave portion extending from an upper side to a hole, and the concave portion has a tapered shape in which the flesh becomes thicker as it approaches the hole. 2. The valve body according to claim 1, wherein the main body portion of the support portion is provided with a valve seat on which the valve body rests, a guide for guiding the valve around the valve seat is provided, and the flow path from the valve sheet communicates with the flow path provided in the casing. Float valve of the pump device, characterized in that. The float valve of claim 1, wherein the main body of the valve unit is formed of a relatively hard synthetic resin, and the valve part melted and attached to the main body is formed of a relatively soft synthetic resin. 2. The pump according to claim 1, wherein the hole between the valves to which the second lag is fitted is flat on the main body side, and the opposite side thereof is arcuate and formed into a long hole along the axial direction between the valves with respect to the second lag. Float valve of the device.

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