JPH0443520Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to a strainer for oil supply equipment, and in particular a shape memory strainer in which the oil passage area changes according to changes in the oil temperature inside the oil supply passage of the oil supply equipment. The present invention relates to a strainer for an oil supply device made of an alloy.

[Prior Art and Problems] Conventionally, for example, in a suspended refueling system, oil pumped up from an underground tank by a pump is routed through piping inside the equipment and outdoor piping to the canopy of the refueling station (roof protruding from the refueling station building). The fuel is supplied to the refueling hose of the delivery unit located on the lower surface of the vehicle (or an independent roof), and the refueling man refuels the vehicle using the refueling nozzle located at the lower end of the refueling hose. In this case, the outdoor wiring is designed to improve workability during maintenance.
It is generally placed on the top of the canopy.

Now, in recent years, refueling using an automatic stop refueling nozzle (auto nozzle), which has an automatic stop function that detects the oil level in the vehicle fuel tank and automatically closes the valve when the oil level reaches a predetermined level. The place is common.
The refueling nozzle is designed to prevent negative energy generated at the orifice because the oil level in the vehicle fuel tank rises as the refueling process progresses, and when the detection hole at the tip of the discharge pipe is blocked by oil, the air supply is cut off. As a result of the pressure acting on the diaphragm, the diaphragm operates due to the generation of negative pressure, and in conjunction with this, the valve stems and locking rollers of the parent and child valves (main valve and auxiliary valve) are separated, so that the parent and child valves is closed to stop refueling.

Conventionally, when the oil supplied through the piping and oil supply hose passes through the main valve of the automatic stop type oil supply nozzle, dirt and scale (impurities) in the pipe adhere to the main valve, causing negative pressure. In some cases, the diaphragm does not operate even when the vehicle fuel tank is full, and the automatic stop function of the fuel nozzle becomes inoperable. In order to prevent such problems, during the three seasons from spring to autumn when the temperature exceeds 10℃, a fine 60 mesh mesh is installed inside the joint that connects the fluid passage of the refueling nozzle body and the refueling hose. A strainer is installed. On the other hand, in winter when the temperature is below 10℃, as the ambient temperature of outdoor piping decreases, the moisture in the oil liquid freezes in the strainer section, clogging the 60-mesh strainer, which causes oil to be supplied from the oil supply hose. In order to prevent the oil from flowing into the fluid passage of the nozzle body, the 60-mesh strainer was removed and replaced with a 40-mesh strainer with a rougher mesh.

However, the conventional oil supply nozzle mentioned above must be replaced with a fine-mesh strainer of 60 mesh when the temperature exceeds 10°C or at high temperatures, and with a coarse-mesh strainer of 40 mesh when the temperature is below 10°C. Therefore, there were problems in that the replacement work was complicated and maintenance was also troublesome.

The present invention solves the above-mentioned problems, and provides a strainer for oil supply equipment that does not require replacement regardless of the temperature fluctuations of the oil inside the liquid supply path of the oil supply equipment due to changes in climate, and is designed to improve maintainability. For the purpose of providing.

[Means for Solving the Problems] In order to achieve the above object, the present invention is provided in a liquid feeding path of an oil supply device, and removes impurities in the oil flowing through the liquid feeding path and allows the oil to pass through. In a strainer for oil supply equipment equipped with an impurity removal section,
The impurity removing section is formed of a shape memory alloy, and when the oil temperature inside the liquid feeding path is below a predetermined temperature, the impurity removing section deforms, thereby increasing the oil passing area of the impurity removing section. It is characterized by the fact that

[Function] According to the present invention, since the impurity removal part is formed of a shape memory alloy, the temperature of the oil inside the liquid supply path will be lower than the predetermined temperature as the temperature in the region where the gas station is located decreases. , the oil passage area of the impurity removal section increases. On the other hand, when the temperature of the oil inside the liquid supply path exceeds a predetermined temperature due to the rise in temperature in the region where the gas station is located, the oil passage area of the impurity removal section returns to its original state. Therefore, even if water in the oil liquid freezes in the impurity removing section, it is possible to prevent the conventional problem of clogging of the impurity removing section. This eliminates the need to replace two impurity removal sections with different oil passage areas depending on temperature changes, as is the case in the past, and is also suitable from a maintenance standpoint.

[Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes an automatic stop refueling nozzle (hereinafter referred to as refueling nozzle) installed at the lower end of a refueling hose (liquid supply path) suspended from a delivery unit of a suspended refueling device (not shown). (abbreviated as "nozzle"), and the oil pumped up from the oil tank (underground tank) by the pump of the main body of the suspended refueling device is supplied to the refueling hose and the refueling nozzle via outdoor piping (liquid feeding path). The outdoor piping is arranged, for example, on the top surface of the canopy.

A stepped portion 3 is provided inside the valve body 2 of the refueling nozzle 1.
A fluid passage 3 having a diameter A is provided, and a first valve seat 4 is press-fitted and fixed to the stepped portion 3A. First valve seat 4
A cylindrical portion 5 having an opening is disposed in the cylindrical portion 5, and a joint 6 is disposed in the cylindrical portion 5. The refueling nozzle 1 is connected to the refueling hose via a joint 6, and the oil pumped up from the underground tank by the pump of the suspended refueling system passes through the outdoor piping and the refueling hose to the refueling nozzle 1. supply is becoming available.

The main valve disposed inside the valve body 2 is composed of a main valve body 7 and an auxiliary valve body 8, and the main valve body 7 is seated on a first valve seat 4 that opens and closes the fluid passage 3. A passage 9 communicating between the upper and downstream sides of the first valve seat 4 is disposed in the main valve body 7, and an auxiliary valve body 8 that opens and closes the passage 9 is supported by the main valve body 7. The main valve body 7 and the auxiliary valve body 8 are biased by a spring 11 that is in elastic contact with the spring receiver 10 of the main valve, and the main valve body 7 is biased against the first valve seat 4, and the auxiliary valve body 8 is biased against the second valve seat 4. They are each seated on a seat 12, and close the fluid passage 3 and the passage 9, respectively.

Next, to explain the mechanism for opening the main valve and the mechanism for automatically closing the valve, the sleeve 13 inserted from the cylindrical portion 5 is fitted into the valve body 2, and the sleeve 13 is inserted into the valve body 2.
3 includes a shaft 1 that abuts the operating lever 14.
5 and a shaft 16 that abuts the auxiliary valve body 8 are slidably fitted, and rollers 17 and 18 are inserted between both shafts 15 and 16. Both rollers 17 and 18 are supported between long holes 21 and 21 of a receiving plate 20 that is integrated with a diaphragm 19, and can slide along the long holes 21 and 21 in the direction of movement of the shafts 15 and 16. ing.

A lid 22 is disposed outside the diaphragm 19, and a diaphragm chamber 23 is formed between the lid 22 and the diaphragm 19. Diaphragm springs 24, 24 are inserted into the diaphragm chamber 23, and the diaphragm 19 is always moved to the right in FIG.
It is biased so that it is inserted between 16 and 16. The shaft 15 has a spring 2 interposed between the shafts 15 and 16.
5 toward the operating lever 14, and a seal ring 26 is inserted between the shaft 16 and the sleeve 13.

Next, the sub-valve that is installed from the discharge pipe 2A side of the valve body 2 will be explained.
A third valve seat 28 is press-fitted and fixed to the discharge pipe 2.
The edge 29A of the valve holding member 29 fitted with A is the third
It is in contact with the edge 28A of the valve seat 28, and is fixed to the valve body 2 by tightening the protrusion 29B of the valve holding member 29 with a flange 30 screwed onto the valve body 2. A third valve seat 2 is provided in the central cylindrical portion 29C of the valve holding member 29.
The valve stem 31A of the sub-valve body 31 seated at the valve seat 8 is slidably fitted, and the sub-valve body 31 is always urged toward the third valve seat 28 by a spring 32. A small hole 34 is brought close to the contact portion 33 between the sub-valve body 31 and the third valve seat 28 and communicates with a cavity 34 defined as the fluid passage 3.
A is open, and the air 34 communicates with a pipe 35, which is connected to an air inlet hole 36 provided at the tip of the discharge pipe 2A.
Further, the air 34 communicates with the diaphragm chamber 23. In addition, 37 is a lever hook, and when the operating lever 14 is pulled up during refueling, the operating lever 1
This is for hooking the end of 4.

On the other hand, a shape memory alloy strainer 40 formed of a shape memory alloy is provided inside the joint 6 at a location facing the lower end of the oil supply hose (oil outflow side).
The shape memory alloy strainer 40 is composed of a flange 41 having a shape that fits into the inner diameter of the joint 6, and a strainer main body 42 in the shape of, for example, a parasitic mesh. The strainer body 4
2 is a plurality of vertical wire rods 42A made of shape memory alloy...
...and multiple horizontal wire rods 42B made of shape memory alloy...
... are arranged vertically and horizontally in a net shape, and these vertical wire rods 42A and horizontal wire rods 42B made of shape memory alloy are:
It is stretched and deformed below a predetermined temperature (transformation point, for example 10° C.), and returns to its original shape when the predetermined temperature is exceeded. That is, the size of the mesh formed by each vertical wire 42A and each horizontal wire 42B (oil liquid passage area) changes depending on the temperature change.
is starting to change.

Therefore, when the temperature of the oil in the piping and oil supply hose is below the predetermined temperature, that is, at low temperatures such as in winter, the shape memory alloy strainer 40 changes to the shape of a 40-mesh with a rough mesh as shown in FIG. . On the other hand, when the temperature of the oil in the piping and oil supply hose exceeds the predetermined temperature, that is, at room temperature or high temperature from spring to autumn, the shape memory alloy strainer 40 4
By shrinking each 2B, it becomes a fine 60-mesh shape as shown in Figure 4. That is, the shape memory alloy strainer 40 is designed to serve as two types of strainers, 40 mesh and 60 mesh, depending on the temperature change of the oil liquid.

Next, the operation of this embodiment with the above configuration will be explained.

In the case of three seasons from spring to autumn in a normal region where the gas station is located and in a cold region, that is, when the temperature of the oil in the piping and fuel hose exceeds 10°C, the shape memory alloy strainer 40
The shape is 60 meshes with fine mesh as shown in Figure 4. If the oil temperature exceeds 10°C, the water in the oil will not freeze, so even if the shape memory alloy strainer 40 is made of 60 mesh, it will not clog the piping. It is possible to prevent dust and scale from entering the oil supply nozzle 1 through the joint 6 and adhering to the main valve.

On the other hand, if the temperature of the oil in the piping and fuel hose is low in the winter in the normal region where the gas station is located, or in late autumn, winter, or early spring in a cold region,
If the temperature is below 10℃, use shape memory alloy strainer 4
0 changes from the fine 60 mesh shape shown in FIG. 4 to the coarse 40 mesh shape shown in FIG. Therefore, even if water in the oil freezes in the strainer portion due to a drop in oil temperature, the shape memory alloy strainer 40 has a rough 40 mesh shape, so the shape memory alloy strainer 40 It is possible to prevent the problem of clogging caused by frozen water as in the past.
Thereby, the shape memory alloy strainer 40 can smoothly remove dust and scale inside the pipe.

According to the above embodiment, the shape memory alloy strainer 40 changes to 40 mesh or 60 mesh depending on the temperature change, so only one strainer is required, instead of two strainers of 40 mesh and 60 mesh as in the conventional case. It is possible to save the trouble of replacing the parts, and it is also suitable from the viewpoint of maintenance.

[Modification] In the above embodiment, the shape memory alloy strainer 4
Although the shape of 0 is an insect net-like shape, it is not limited to this, and any shape that can remove dust, scale, etc. inside the pipe may be used.

That is, for example, a shape memory alloy strainer 5 made of a shape memory alloy as shown in FIG.
0 may be used. The shape memory alloy strainer 50 is composed of a flange 51 having a shape that fits with the inner diameter of the joint 6, and a strainer body 52 whose outer circumferential portion is approximately cylindrical and whose tip portion is a part of an approximately spherical surface. A large number of holes 53 (oil passage area) each having a lid 53A are formed on the entire surface of the strainer body 52. In the shape memory alloy strainer 50, when the temperature of the oil in the piping and oil supply hose is below a predetermined temperature (for example, 10° C.), the cover 5 of the hole 53 closes as shown in FIG.
3A is opened, and when the oil temperature exceeds the predetermined temperature, the lid 53A returns to its original position and closes the hole 53, as shown in FIG. In this case, when the lid 53A is closed, a slight gap is created between the lid 53A and the edge of the hole 53, allowing oil to pass through.

Furthermore, a shape memory alloy strainer 6 made of a shape memory alloy as shown in FIG. 6A, for example.
0 may be used. The shape memory alloy strainer 60 consists of a flange 61 shaped to fit into the inner diameter of the joint 6, and a number of band-like members 62A whose proximal ends are fixed to the flange 61 and whose distal ends point toward the center of the flange. Strainer body 6
It is composed of 2. In the shape memory alloy strainer 60, when the temperature of the oil in the piping and oil supply hose is below a predetermined temperature (for example, 10°C), each strip member 62A is removed as shown in FIG.
is curved and opened to one side of the flange 61, so that an opening (oil passage area) surrounded by the tips of the strip members 62A is formed in the center of the strainer main body 62. 62
While the gap between A becomes wider, when the oil temperature exceeds the predetermined temperature, each strip member 62A returns to its original shape and becomes oriented toward the center of the flange, as shown in FIG. There is. In this case, in the state shown in A of the same figure, a slight gap (oil passage area) is created between each adjacent strip member 62A and at each tip, allowing passage of oil. There is.

In the above embodiment, the shape memory alloy strainer 4
0 is disposed at the end facing the refueling hose inside the joint 6, but the present invention is not limited to this.
It may be arranged in a suitable position of the joint 6,
Alternatively, it may be arranged at an appropriate location on the upstream side of the fuel nozzle 1. Or, refueling nozzle 1
The valve body 2 may be disposed on the oil liquid inflow side from the oil supply hose.

In the above embodiment, the shape memory alloy strainer 4
Although the zero transformation point is set to 10°C, the temperature is not limited to this and may be set to correspond to the climatic conditions of the region where the gas station is located.

[Effects of the invention] As explained above, according to the invention, an impurity removing section is provided in the liquid feeding path of the oil supply device and removes impurities from the oil flowing through the liquid feeding path and allows the oil to pass through. In a strainer for an oil supply device comprising:
The impurity removing section is formed of a shape memory alloy, and when the oil temperature inside the liquid feeding path is below a predetermined temperature, the impurity removing section deforms, thereby increasing the oil passing area of the impurity removing section. With this configuration, the following effects can be achieved.

When the temperature of the oil inside the liquid supply path of the oil supply device drops below a predetermined temperature in winter, etc., the impurity removal section deforms and the oil passage area in the impurity removal section increases. Even if the water in the oil liquid freezes in the removal section, the impurity removal section can be prevented from clogging.
The oil can smoothly flow from the oil supply hose to the oil supply nozzle side. Therefore, as in the past, 2
This eliminates the hassle of replacing multiple impurity removal sections in response to temperature changes in the area where the gas station is located, and allows one impurity removal section to cope with the temperature changes. This saves the effort of replacing the impurity removal section and is also suitable from the viewpoint of maintenance.

[Brief explanation of the drawing]

Figure 1 shows a refueling nozzle 1 according to an embodiment of the present invention.
A vertical cross-sectional view showing the configuration of the
FIG. 3 is a sectional view taken along the line and shows the shape memory alloy strainer 40 when the temperature is below a predetermined temperature according to this practical example.
4 is a schematic perspective view showing the structure of the shape memory alloy strainer 40 when the temperature exceeds a predetermined temperature according to this practical example, and FIG. 5A is a schematic perspective view showing the structure of the shape memory alloy strainer 50 according to a modified example A schematic perspective view showing the configuration, B is a schematic perspective view showing the state of the hole 53 and the lid 53A when the temperature is below a predetermined temperature, and C is a schematic perspective view showing the state of the hole 53 and the lid 53A when the temperature exceeds the predetermined temperature.
FIG. 6A is a schematic perspective view showing the configuration of the shape memory alloy strainer 60 when the temperature is below a predetermined temperature according to a modification, and FIG. 60 is a schematic perspective view showing the configuration of the device 60. FIG. 6... Joint (liquid feeding path), 40... Shape memory alloy strainer (impurity removal section), 50... Shape memory alloy strainer (impurity removal section), 60... Shape memory alloy strainer (impurity removal section).

Claims (1)

[Claims for Utility Model Registration] A strainer for an oil supply device, which is provided in a liquid feeding path of the oil feeding device and includes an impurity removing section that removes impurities from the oil flowing through the liquid feeding path and allows the oil to pass through. In this, the impurity removing section is formed of a shape memory alloy, and when the oil temperature inside the liquid feeding path is below a predetermined temperature, the impurity removing section deforms to reduce the oil passing area of the impurity removing section. A strainer for an oil supply device, characterized in that the strainer increases the amount of water.