JP3216512B2 - Gas-liquid separation device of 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 gas-liquid separation device for a pump for a weighing machine installed at a gas station such as a gas station. The present invention relates to a gas-liquid separation device of a pump device in which a flow path for outflow of a gas-liquid mixed flow is provided on one wall surface of a spiral chamber and the other wall surface of the spiral chamber communicates with a strainer chamber.

[0002]

2. Description of the Related Art Generally, a pump device for a weighing machine installed at a gas station or other gas station is provided with a gas-liquid separation device for separating gas mixed as bubbles in a liquid. . In this conventional gas-liquid separation device (see, for example, Japanese Patent Application Laid-Open No. Hei 5-193699 according to the present applicant),
The oil that has flowed into the casing from the inflow passage is pressurized by a pump and generates a vortex to guide the liquid with a relatively high specific gravity radially outward, and the gas-liquid mixture with a relatively light specific gravity at the center. The gas-liquid mixture collected at the center is guided to the float chamber, the separated gas is discharged from the air vent, and the liquid returns to the pump.

However, in such a conventional apparatus, 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. The whole becomes larger. Therefore, for the purpose of miniaturization, the present applicant has proposed a structure of a gas-liquid separation device of a pump device in Japanese Patent Application No. 7-140223.

[0004] In order to better understand the present invention, the technique proposed in the above-mentioned Japanese Patent Application No. 7-140223 will be described with reference to FIG. An inflow port I and an outflow port O are formed in the box-shaped casing C, and the inflow port I communicates with a cylindrical inflow-side strainer chamber 1, and the inflow-side strainer chamber 2 communicates with the inflow-side strainer chamber 1. Is housed. The inflow-side strainer chamber 1 is connected to a pump 6 through a check valve 5.
The outlet 8 of the pump 6 communicates with a tangential direction of the spiral chamber 10. The spiral chamber 10 has a cylindrical shape, and communicates with a chamber 30 formed between the spiral chamber 10 and a lid 31 through a small hole 13a formed in one wall surface 13 of the spiral chamber. To the flow path 20. The other wall surface of the spiral chamber 10 communicates with the strainer chamber 17 via the tubular member 11. The gas-liquid separation device 9 is composed of a spiral chamber 10, a cylindrical member 11, small holes 13a for outflow of a gas-liquid mixed flow, and a strainer 14 described later.

[0005] The strainer chamber 17 is formed in a cylindrical shape,
It communicates with the outlet O through the control valve 18,
The lower portion of the strainer chamber 17 communicates with the flow path 7 on the inlet side of the pump 6 via a bypass valve 19. And
A strainer 14 is provided in the strainer chamber 17, and the cylindrical member 11 is integrally formed on one flange 12b of the strainer 14 concentrically with the strainer 14, and the other end is closed by a lid 12a. Have been. A lid 15 is detachably provided on the outside of the casing C with bolts (not shown), and a spring 16 abuts and presses the lid 12a of the strainer 14 opposed thereto, and an opposite flange 12b is formed on the casing C. Seat surface Ca
It is seated on and closely adhered.

On the opposite side of the spiral chamber 10 from the strainer chamber 17, a disk 13 having a small hole 13a for discharging a gas-liquid mixed flow is formed.
Is formed in the casing C, and a lid 31 for closing the opening 30 is attached. The flow path 20 communicating with the small hole 13a communicates with a float chamber 21. The float chamber 21 is provided with a float valve 22 that opens when oil accumulates to a level L. Is provided with an air vent V. Then, the outlet channel 23 of the float chamber 21
Communicates with the inflow-side strainer chamber 1. Note that reference numeral 2
Reference numeral 4 denotes a lid for closing the opening 24 for mounting the check valve 5.

In this device, oil from an underground tank (not shown) flows into the pump device from an inlet I, and dirt and the like is removed by an inflow-side strainer 2, and flows from a strainer chamber 1 through a check valve 5 to a flow path 7. From the pump 6. 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 a gas having a relatively high specific gravity passes through the strainer 14, enters the strainer chamber 17, pushes and opens the control valve 18, flows to the outlet O, and is supplied from an oil supply nozzle (not shown). On the other hand, when the pump 6 is operated and oil is not supplied, the oil is returned from the strainer 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. Then, the amount of oil in the float chamber 21 becomes level L
Is exceeded, the float valve 22 is opened and returned to the inlet side strainer chamber 1.

The above-mentioned proposed technique is effective because the tubular member 11 is provided in the strainer 14, so that the whole apparatus is compact and the gas-liquid separation efficiency does not decrease. However, the drawback is that the strainer 14 is damaged by the discharge pressure of the pump 6 when the strainer 14 is clogged, or the collected dust flows out when the strainer 14 slides over the pressing force of the spring 16. Have.

[0009]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a gas-liquid separation device for a pump device in which a cylindrical member is provided in a strainer to make the device compact and breakage is prevented when the strainer is clogged. It is intended to provide.

[0010]

According to the present invention, a discharge side of a pump communicates with a tangential direction of a spiral chamber, and a flow path for outflow of a gas-liquid mixed flow is provided on one wall surface of the spiral chamber. In a gas-liquid separation device of a pump device in which the other wall of a spiral chamber communicates with a strainer chamber, a cylindrical member and a strainer are provided in the strainer chamber in connection with the spiral chamber, and the strainer is cylindrical and one end face is cylindrical. Attached to the flange of the
A lid is attached to the other end surface, one end of the tubular member is opened inside the strainer, and the other end is slidably fitted in a passage communicating the spiral chamber and the strainer chamber, A spring that presses the strainer in the direction of the spiral chamber is in contact with the lid.

Further, according to the present invention, the cylindrical member slides on the guide portion, and a through hole is provided in the guide portion, and the through hole is formed when the strainer slides against the pressing force of the spring. Communicates with the outlet.

According to the present invention, the tubular member slides on the guide portion, and a groove is formed on the outer periphery of the guide portion.
One end of the groove reaches the bearing surface of the flange of the cylindrical member, the other end does not reach the end of the guide portion, and when the strainer slides against the pressing force of the spring, the other end of the groove Communicates with the swirl chamber.

Further, according to the present invention, a sensor is provided which comes into contact with the cover of the strainer when the strainer slides and which operates together, and one end of the sensor is externally detected so as to be detectable from the outside of the pump device. Let it.

Therefore, the liquid discharged from the pump is
The swirl flows into the swirl chamber in the tangential direction to generate a swirl flow, and the gas-liquid mixed flow having a relatively low specific gravity gathers at the center of the swirl flow and enters the outflow channel on one wall surface of the swirl chamber. The liquid component having a higher specific gravity enters the tubular member and is separated into gas and liquid. And
The liquid component that has entered the cylindrical member is discharged after dust and the like are removed by a strainer. When the strainer is clogged, a pressure difference is generated between the inside of the strainer and the strainer chamber, and the pressure acts on the cover of the strainer, overcoming the pressing force of the spring, and the strainer slides with the tubular member. And the through-hole provided in the cylindrical member forms a short circuit to the strainer chamber from the cylindrical member to the outlet, and further pressurization in the strainer is suppressed, and breakage is prevented. The sliding operation of the strainer can be detected by monitoring one end of a sensor protruding outside the pump device.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a part of a gas-liquid separation device embodying the present invention, and other parts of a pump device, not shown, are the same as those of FIG.
The outlet side flow path 8 of the pump (see FIG. 3) communicates with the tangential direction of the spiral chamber 10, and a small hole 13a is provided on one wall surface (right side in the drawing) of the spiral chamber 10, and the small hole 13a It is in communication with the flow path 20 for outflow of the liquid mixture flow. The other wall surface of the spiral chamber 10 communicates with the strainer chamber 17,
A cylindrical member 11A is provided in the strainer chamber 17 so as to be connected to the spiral chamber 10, and a cylindrical strainer 14A is provided.
Is provided. The strainer 14A has a cylindrical shape in the illustrated example, and has a lid 12a attached to one end and a flange 12c provided on the cylindrical member 11A at the other end. The cylindrical member 11A and the strainer 14A are formed concentrically and integrally. One end of the cylindrical member 11A extends to the inside of the strainer 14A and is open.
1a is formed, and is slidably fitted in a passage R communicating the spiral chamber 10 and the strainer chamber 17. Further, a through hole T is formed in the guide portion 11a, and a short circuit is formed from the inside of the guide portion 11a to the strainer chamber 17 when the strainer 14A slides, as described later, and communicates directly with the outlet O. It is supposed to.

A spring 16 is provided between the lid 12a and a lid 15A provided on the casing so as to face the same. The strainer 14A is pressed rightward in the drawing, and the flange 12c is pressed against the seating surface Ca. Have been. In addition, lid 15A
Is provided with a sensor 30 slidably therethrough, and the inner tip of the sensor 30 faces the lid 12a,
When the strainer 14A slides, it comes into contact with the lid 12a and moves together. Therefore, this sensor 3
When 0 protrudes, it is understood that the strainer 14A and the cylindrical member 11A have slid. Reference numeral 31 denotes the lid 15
A seal inserted to prevent leakage from between A and the sensor 30.

Next, the operation will be described. Pump 6 (Fig. 5)
Liquid flows from the flow path 8 into the swirl chamber 10 in a tangential direction to generate a swirl flow, and the gas-liquid mixed flow having a relatively low specific gravity gathers at the center of the swirl flow to form a swirl flow. The water enters the outflow channel 20 through the small hole 13a on one wall surface, and is separated into gas and liquid in the float chamber 21 (FIG. 5). On the other hand, the liquid component having a relatively heavy specific gravity is the cylindrical member 11A connected to the other wall surface.
Then, dust and the like are removed by the strainer 14A, and the dust enters the strainer chamber 17 and is discharged from the outlet O.

As shown in FIG. 2, when the strainer 14A is clogged, a pressure difference is generated between the inside of the strainer 14A and the strainer chamber 17, and the pressure acts on the lid 12a, and the pressing force of the spring 16 is exerted. To overcome the cylindrical member 1
Using the guide portion 11a of 1A as a guide, the strainer 14
A slides to the left of the drawing. Then, a through-hole T provided in the guide portion 11a is opened to form a short circuit that directly flows into the strainer chamber 17 as shown by an arrow X, and further pressurization of the strainer 14A is suppressed, Damage is prevented. Also, when the strainer 14A slides,
The sensor 30 is also moved by engaging with the lid 12a, and the lid 15A
Therefore, by monitoring one end of the sensor 30, this operation can be detected, and the maintenance time such as cleaning of the strainer can be known.

Next, a second embodiment of the present invention will be described with reference to FIGS. In this embodiment, a groove Ta is provided in the passage R outside the guide 11a without providing the through hole T in the guide 11a. The groove Ta is normally closed by the flange 12c in the illustrated state, and is formed to be shorter than the guide portion by the length e.

In operation, when the strainer 14A becomes clogged, the strainer 14A moves to the left in the drawing as described above, and the groove Ta communicates with the spiral chamber 10 to form a short circuit in the strainer chamber 17. The number of the grooves Ta is arbitrary, and is not limited to the illustrated example. The other points are the same as in the above embodiment.

[0021]

As described above, according to the present invention, the pump device is made compact by providing the cylindrical member and the strainer integrally, and when the strainer is clogged, the short circuit opens. As a result, the strainer is prevented from being broken by suppressing the pressure increase, and in this case, the trapped waste does not flow out. Further, replacement of the strainer and the tubular member is easy.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing the strainer of FIG. 1 in a clogged state;

FIG. 3 is a sectional view showing another embodiment of the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a sectional view showing a gas-liquid separation device of a pump device proposed by the present applicant.

[Explanation of symbols]

 I ... Inflow port O ... Outflow port C ... Casing T ... Through hole Ta ... Groove 1 ... Inflow side strainer chamber 2 ... Inflow side strainer 5 ... Check valve 6 ... Pump 8 ... Flow path 9 ... Gas-liquid separator 10 ... Swirl chamber 11,11A ... Cylinder member 11a ... Guide part 12a ... Lid body 12b, 12c ...・ Flange 13 ・ ・ ・ Disc 13a ・ ・ ・ Small hole 14, 14A ・ ・ ・ Strainer 15, 15A ・ ・ ・ Cover 16 ・ ・ ・ Spring 17 ・ ・ ・ Strainer chamber 18 ・ ・ ・ Control valve 19 ・ ・ ・ Bypass valve Reference Signs List 20 flow path 21 float chamber 22 float valve 23 flow path 24 opening 25 lid

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-8-324699 (JP, A) JP-A-5-193697 (JP, A) JP-A 8-200034 (JP, A) JP-A 8- 326665 (JP, A) Japanese Utility Model Showa 64-5659 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B67D 5/58 B01D 19/00 102

Claims (4)

(57) [Claims] 1. A discharge side of a pump communicates with a tangential direction of a spiral chamber, a flow path for gas-liquid mixed flow outflow is provided on one wall surface of the spiral chamber, and the other wall surface of the spiral chamber is connected to a strainer chamber. In the gas-liquid separation device of the pump device which is communicated, a cylindrical member and a strainer are provided in the strainer chamber in connection with the spiral chamber, and the strainer is cylindrical and one end surface is integrally attached to a flange of the cylindrical member, A lid is attached to the other end surface, and one end of the tubular member opens inside the strainer,
The other end is slidably fitted in a passage communicating the spiral chamber and the strainer chamber, and a spring for pressing the strainer in the spiral chamber direction is in contact with the lid. Gas-liquid separation device of the pump device. 2. The cylindrical member is slid by a guide portion, a through hole is provided in the guide portion, and the through hole communicates with the outlet when the strainer slides against the pressing force of the spring. The gas-liquid separation device for a pump device according to claim 1. 3. The cylindrical member is slid by a guide portion, a groove is formed on the outer periphery of the guide portion, one end of the groove reaches a seating surface of a flange of the cylindrical member, and the other end of the guide portion has a groove. The gas-liquid separation device of a pump device according to claim 1, wherein the other end of the groove communicates with the volute when the strainer does not reach the end and slides against the pressing force of the spring. 4. A sensor which is provided so as to be in contact with the cover of the strainer when the strainer slides and which operates together, and one end of the sensor is protruded from the outside of the pump device so as to be detectable. Or the gas-liquid separation device of the pump device according to 2.