JP2009162686A - Filter clogging detector and fuel filling device with filter the clogging detector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filter clogging detector for detecting clogging and visually recognizing clogging, using a simple structure, without having to use electrical components. <P>SOLUTION: This filter clogging detector comprises a base object 11, forming a part of a duct in which fluid to be filtered flows, and a movable member 12 (impeller), through which a shaft bar 15 suspended on the base object 11 is penetrated, and that is supported rotatably and is rotated by a received force from the fluid. The shaft bar 15 is penetrated through coil springs 16 and 17, and press members 18 and 19 pressing the movable member 12 with elastic force of the coil springs 16 and 17, and they constitute a working fluid defining means for defining the flow quantity of the fluid required for the work of the movable member 12. The base object 11 has a transparent peephole 11a that allows visual recognition of the movable element 12. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a filter clogging detection device applied to a filter that removes contamination from a flowing fluid by a filtering action, such as a fuel filter and a hydraulic oil filter, and a fuel supply device with a filter clogging detection device.

  Patent Document 1 discloses a clogging detection device that detects clogging of a filter built in an air cleaner. This clogging detection device includes an impeller that rotates with a flow of air to be filtered, and a detector that detects the rotational speed of the impeller. The detection tool includes a pointer for indicating the rotation speed of the impeller by a swing width, a shaft rod as a rotation shaft of the pointer, and a spring for urging the shaft rod in a direction in which the rotation speed indicated by the pointer is reduced. , An electromagnet that rotates integrally with the rotating shaft of the impeller, and a derivative that rotates following the electromagnet and rotates the shaft rod against the mainspring.

Patent Document 2 discloses a filtration device with a differential pressure indicator. The filtration device includes a relief valve that opens in response to clogging of the filter, a differential pressure indicator that operates in response to the opening of the relief valve, and an indicator lamp that lights in conjunction with the operation of the differential pressure indicator. It has.
Japanese Utility Model Publication No.59-40564 Japanese Patent No. 3499303

  Incidentally, a fuel supply device for supplying fuel to construction machines such as a hydraulic excavator and a wheel loader includes a fuel filter for removing fuel contamination. This fuel refueling device sucks up fuel (light oil) in a container such as a drum can by using a pump and guides the fuel discharged from the pump to a fuel tank through a pipe. A fuel filter is provided on the pipe. ing. It is desirable that this fuel supply device can also check the clogging of the fuel filter.

  Therefore, it is conceivable to provide a filter clogging detection device in the fuel supply device using the techniques disclosed in Patent Documents 1 and 2. However, the clogging detection device and the filtering device disclosed in Patent Documents 1 and 2 are complicated structures having means for interlocking the means for detecting clogging and the means for enabling visual detection of the detection result, Manufacturing cost is high. In addition, because it has electrical parts, it is not suitable for environments that are easily exposed to dust and moisture, such as a gas station for construction machinery. Not only is the manufacturing cost high, but the fuel refueling device becomes large and difficult to handle.

  The present invention has been made in consideration of the above-mentioned circumstances, and its purpose is to detect the clogging of the filter and to confirm that the detection result of the clogging can be visually confirmed with an electric component having a simple structure. It is an object of the present invention to provide a filter clogging detection device that can be realized without using the filter, and a fuel supply device with the filter clogging detection device.

  The present invention is configured as follows to achieve the above-described object.

[1] A filter clogging detection device according to the present invention is a filter clogging detection device that detects clogging of a filter provided in a pipeline through which a fluid to be filtered flows, and a base body that forms a part of the pipeline. And a movable member that is provided in the base body and moves by a force received from the flowing fluid, and an operating flow rate defining means that regulates the flow rate of the fluid required for the operation of the movable member, The base body is provided with a visible portion through which the movable member can be seen.

  In the filter clogging detection device of the present invention configured as described above, the movable member moves when the flow rate of the fluid is equal to or higher than the flow rate defined by the operating flow rate defining means. On the other hand, when the flow rate of the fluid is less than the flow rate defined by the operating flow rate defining means, the movable member does not move. That is, since the flow rate of the fluid decreases as the filter is clogged, the state in which the movable member is not moving indicates that the movable member has detected clogging of the filter. Whether or not the movable member is moving can be confirmed by directly viewing the movable member through the base body since at least a part of the base body is transparent.

  In addition, the operating flow rate defining means includes electric parts such as a member that applies a load in a direction that impedes movement to the movable member, and a shape and size of the movable member that reduces the pressure receiving area of the movable member with respect to the flowing fluid. It can be configured by not including.

  Therefore, according to the filter clogging detection apparatus of the present invention, the means for detecting clogging and the detection result that clogging of the filter is detected and that the detection result of clogging can be visually confirmed. It can be realized without using an electrical component with a simple structure that does not have a means for interlocking with a means for enabling visual recognition.

[2] The filter clogging detection device according to the present invention is the filter clogging detection device according to “[1]”, wherein the movable member is rotatably supported and has wings, and the fluid flowing The operating flow rate defining means includes a spring that applies a load to the movable member.

[3] The filter clogging detection device according to the present invention is the filter clogging detection device according to “[2]”, wherein the wings are provided in an odd number around the rotation center of the movable member, and The surface which receives force from the flowing fluid satisfies at least one of a curved shape having a concave curved surface.

[4] A fuel refueling device with a filter clogging detection device of the present invention includes a pump that sucks fuel from a container storing fuel, a pipe that forms a pipe that leads the fuel from the pump to a fuel tank, and the pipe. A fuel refueling device including a fuel filter for removing contamination from flowing fuel, comprising the filter clogging detection device according to any one of “[1]” to “[3]”. And

[5] The fuel supply device with a filter clogging detection device according to the present invention is the fuel supply device with a filter clogging detection device according to “[4]”, in which the filter clogging detection device is downstream of the fuel filter. It is characterized by being arranged in.

  According to the filter clogging detection device described in “[1]” to “[3]”, as described above, the filter clogging detection and the clogging detection result can be visually confirmed. This can be realized with a simple structure and without using electrical components. As a result, a filter clogging detection device suitable for use in an environment that is easily exposed to dust and water can be realized at a low manufacturing cost.

  According to the invention of the fuel supply device with the filter clogging detection device described in “[4]”, “[5]”, the filter clogging detection device described in “[1]” is provided. A fuel refueling device with a filter clogging detection device suitable for use in an environment that is easily exposed to moisture can be realized.

  FIG. 1 is a hydraulic circuit diagram showing an outline of the configuration of a fuel supply device with a filter clogging detection device according to an embodiment of the present invention. FIG. 2 is a top view of the filter clogging detection device according to the embodiment of the present invention. FIG. 3 is a view showing a movable member provided in the filter clogging detection device shown in FIG.

  As shown in FIG. 1, the fuel refueling device 1 with a filter clogging detection device (portion surrounded by a broken line) according to the present embodiment sucks up fuel (light oil) in a container 5 storing fuel, such as a drum can. And a pipe 3 that forms a conduit for guiding the fuel discharged from the pump 2 to the fuel tank 6. The pipe 3 is provided with a fuel filter 4 for removing contamination from the fuel by filtration and a filter clogging detection device 10. The filter clogging detection device 10 is disposed upstream of the fuel filter 4.

  As shown in FIG. 2, the filter clogging detection device 10 according to this embodiment includes a cylindrical base body 11. The pipe 3 is divided into an upstream pipe 3a and a downstream pipe 3b on the downstream side of the fuel filter 4, and both ends of the base body 11 are inserted into the upstream pipe 3a and the downstream pipe 3b, respectively. That is, the base body 11 forms a part of a conduit that guides the fuel to the fuel tank 6.

  As shown in FIG. 3, a movable member 12 is provided inside the base body 11. The movable member 12 has a cylindrical portion 13 that forms a shaft hole. A shaft rod 15 is bridged inside the base body 11, and the shaft rod 15 is inserted into the shaft hole and penetrates the cylindrical portion 13. That is, the movable member 12 is rotatably supported.

  The movable member 12 (impeller) has an odd number of blades 14 that receive a force from fuel flowing in the direction of arrow R. The wings 14 extend radially from the cylindrical portion 13 and are arranged at equal intervals around the rotation center of the movable member 12. Further, the wing 14 has a curved shape in which a surface receiving a force from the flowing fuel has a concave curved surface.

  The shaft rod 15 is inserted through coil springs 16 and 17. A pressing member 18 that presses the cylindrical portion 13 by the elastic force of the coil spring 16 is disposed between the coil spring 16 and the cylindrical portion 13. A pressing member 19 that presses the cylindrical portion 13 by the elastic force of the coil spring 17 is also disposed between the coil spring 17 and the cylindrical portion 13. A shaft rod 15 is inserted through the pressing members 18 and 19. From these coil springs 16, 17 and pressing members 18, 19, an operating flow rate defining means that regulates the flow rate of fuel required for the operation of the movable member 12 by applying a frictional force as a load in a direction that prevents rotation to the movable member 12. Is configured.

  The base body 11 is made of acrylic, and a part thereof is transparent so that the movable member 12 can be visually observed. That is, the base body 11 is provided with a viewing window 11a as a visible portion where the movable member 12 is visible. A colored portion 14 a having a different color from the other portions is provided at the tip of the wing 14.

  A net 20 is provided downstream of the movable member 12 inside the base body 11.

  In the filter clogging detection device 10 configured as described above, the flow rate of the fuel flowing through the pipe line formed by the base body 11 is changed by the operating flow rate defining means (coil springs 16 and 17 and the pressing members 18 and 19). When the flow rate exceeds the specified flow rate, the movable member 12 rotates according to the flow of fuel. On the other hand, when the flow rate of the fuel flowing through the pipeline formed by the base body 11 is less than the flow rate defined by the operating flow rate defining means, the movable member 12 does not rotate. That is, since the flow rate decreases as the fuel filter 4 is clogged, the state in which the movable member 12 is not rotating indicates that the movable member 12 has detected clogging of the fuel filter 4. Whether or not the movable member 12 is rotating can be confirmed by visually observing the movable member 12 directly from the viewing window 11a. If the movable member 12 is rotated, the color of the wing 14 is mixed with the color of the colored portion 14a and the color of the other portion, and if it is not rotated, the colored portion 14a appears. You can see the boundary between the color and the other colors.

  According to the filter clogging detection device 10 according to the present embodiment, the following effects can be obtained.

  According to the filter clogging detection device 10, the clogging detection of the fuel filter 4 and the fact that the clogging detection result can be visually confirmed can be visually confirmed. It is simple and does not have means for interlocking with the means, and can be realized without using electrical components. That is, a filter clogging detection device suitable for use in an environment that is easily exposed to dust and water can be realized at a low manufacturing cost.

  In the filter clogging detection device 10, since the odd number of wings 14 are provided around the rotation center of the movable member 12, the movable member 12 can be smoothly rotated. Moreover, the movable member 12 can be smoothly rotated also when the wing | blade 14 is curving and the surface which receives force from the flowing fuel forms a concave curved surface.

  In the filter clogging detection device 10, since the wing 14 has the colored portion 14a, it is easy to distinguish between the rotating state and the non-rotating state of the movable member 12. That is, it is easy to confirm whether or not filter clogging has been detected.

  Since the filter clogging detection device 10 includes the mesh 20, even when the movable member 12 or the like is damaged, it is possible to prevent the fragments of the movable member 12 from entering the fuel tank 6.

  According to the fuel supply apparatus 1 according to the present embodiment, the following effects can be obtained.

  Since the fuel supply device 1 includes the filter clogging detection device 10, it is possible to realize a fuel supply device with a filter clogging detection device that is suitable for use in an environment that is easily exposed to dust and water.

  In the fuel supply device 1, the filter clogging detection device 10 is arranged downstream of the fuel filter 4, and the filter clogging detection device 10 includes a net 20. As a result, it is possible to prevent foreign matter that has entered the upstream pipe 3 a during replacement of the fuel filter 4 from entering the fuel tank 6.

  In the fuel supply device 1 according to the above-described embodiment, the filter clogging detection device 10 is disposed on the downstream side of the fuel filter 4, but the arrangement of the filter clogging detection device in the present invention is not limited thereto. Alternatively, it may be upstream of the fuel filter.

  In the filter clogging detection device 10 according to the above-described embodiment, the operating flow rate defining means includes the coil springs 16 and 17 and the pressing members 18 and 19 and applies a frictional force as a load in a direction that prevents the rotation of the movable member 12. However, the operating flow rate defining means in the present invention is not limited to this. The operating flow rate defining means may be a torsion spring, and an elastic force may be applied as a load in a direction that prevents rotation of the movable member 12. The operating flow rate defining means may be the shape and size of the movable member, for example, a through hole formed in the wing and through which the fuel passes, or an inclined surface formed in the wing and through which the fuel is received. .

  In the filter clogging detection device 10 according to the above-described embodiment, a part of the base body 11 is transparent, but the base body in the present invention is not limited thereto, and the whole may be transparent. .

  Although the filter clogging detection device 10 according to the above-described embodiment is used for the fuel filter 4, the filter clogging detection device in the present invention is not limited to this, but for the hydraulic oil filter. May be used. Since hydraulic oil has a larger range of viscosity change than fuel (light oil), an adjustment screw may be provided so that the elastic force of the coil springs 16 and 17 can be adjusted.

  In the movable member 12 in the filter clogging detection device 10 according to the above-described embodiment, an odd number of wings 14 are provided around the rotation center, and the surface that receives the flowing fluid has a curved shape with a concave curved surface. However, the movable member in the present invention is not limited to this, and an odd number of wings are provided around the rotation center, and the surface that receives the flowing fluid has a curved shape with a concave curved surface. You may satisfy | fill only any one of things.

  The filter clogging detection device 10 according to the above-described embodiment determines whether or not the fuel filter 4 is clogged based on whether the movable member 12 is in the rotating state or the stopped state. The operating flow rate defining means (coil springs 16 and 17 and the pressing members 18 and 19) are provided so as to be able to do this, but even if this operating flow rate defining means is not provided, it changes according to the rotational speed of the movable member 12. If the color of the movable member 12 to be able to distinguish between the rotational speed of the movable member 12 in a clogged state and the rotational speed of the movable member 12 in a clogged state, the fuel filter 4 It can be determined whether or not is clogged. As a color of the movable member 12 in this case, for example, during the rotation of the movable member 12 in a state where the movable member 12 is not clogged, the color of the wing 14 is the color of the colored portion 14a and the color of the other portion. It can be considered that one color is mixed and the boundary between the colored portion 14a and the color of the other portion can be seen during the rotation of the movable member 12 in the clogged state.

  The movable member may be as shown in FIGS. 4-6 is a figure which shows another example of a movable member. 4 to 6 are denoted by the same reference numerals as those in FIG.

  The movable member 30, that is, the impeller shown in FIG. The wings 31 extend radially from the cylindrical portion 13 and are arranged at equal intervals around the rotation center of the movable member 30. Moreover, the wing | blade 31 is extended linearly and the surface which receives force from the flowing fuel is a flat surface. A guide plate 32 for guiding the flowing fuel is provided on the upstream side of the movable member 12 on one side of the wings 31 facing each other with the cylindrical portion 13 interposed therebetween. The guide plate 32 prevents the force applied to both wings 31 positioned opposite to each other with the cylindrical portion 13 therebetween, so that the movable member 12 can be operated when the flow rate of the flowing fuel is equal to or higher than the specified flow rate. It is prevented from stopping.

  In the movable member 40 shown in FIG. 5, that is, the impeller, the cylindrical portion 41 forming the shaft hole is arranged in a posture parallel to the fuel flow direction (arrow R direction). A support rod 44 is spanned in the base body 11, and a shaft rod 43 extends in parallel with the fuel flow direction from the support rod. The shaft rod 43 is inserted through the cylindrical portion 41 and supports the movable member 40 in a rotatable manner. A plurality of wings 42 extend from the cylindrical portion 41. Although not shown, the wing 42 has an inclined surface that changes a force received from the flowing fuel into a rotational force around the shaft rod 43.

  In the movable member 50 shown in FIG. 6, only one straight wing 51 extends from the cylindrical portion 13 through which the shaft rod 15 is inserted. That is, the movable member 50 does not rotate in accordance with the fuel flow like the above-described movable members 12, 30, and 40, but rotates so that the wings 51 fly in the fuel flow.

1 is a hydraulic circuit diagram showing an outline of a configuration of a fuel supply device with a filter clogging detection device according to an embodiment of the present invention. It is a top view of a filter clogging detection device according to an embodiment of the present invention. It is a figure which shows the movable member with which the filter clogging detection apparatus shown in FIG. 2 was equipped. It is a figure which shows another example of a movable member. It is a figure which shows another example of a movable member. It is a figure which shows another example of a movable member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fuel supply apparatus 2 Pump 3 Pipe 3a Upstream pipe 3b Downstream pipe 4 Fuel filter 5 Container 6 Fuel tank 10 Filter clogging detection apparatus 11 Base body 11a Viewing window 12 Movable member 13 Cylindrical part 13a Shaft hole 14 Wing 14a Coloring part 15 Shaft rods 16 and 17 Coil springs 18 and 19 Press member 20 Net 30 Movable member 31 Feather 32 Guide plate 40 Movable member 41 Cylindrical portion 42 Feather 43 Shaft rod 44 Support rod 50 Movable member 51 Feather

Claims (5)

In a filter clogging detection device for detecting clogging of a filter provided in a pipeline through which a fluid to be filtered flows,
A base body that forms a part of the conduit, a movable member that is provided on the base body and moves by the force received from the flowing fluid, and a flow rate of the fluid required for the operation of the movable member is defined. Operating flow rate regulating means,
A filter clogging detection device, wherein the base body is provided with a visible portion through which the movable member can be seen. In the filter clogging detection device according to claim 1,
The movable member is rotatably supported and has a wing, and is rotated by receiving a force from the flowing fluid with the wing.
The filter clogging detection device, wherein the operating flow rate defining means includes a spring that applies a load to the movable member. In the filter clogging detection device according to claim 2,
Satisfying at least one of the fact that the wings are provided in an odd number around the rotation center of the movable member, and that the surface receiving the force from the flowing fluid is a curved shape having a concave curved surface. A filter clogging detection device as a feature. A fuel supply comprising a pump that sucks fuel from a container storing fuel, a pipe that forms a pipe that leads the fuel from the pump to a fuel tank, and a filter that removes contamination from the fuel flowing through the pipe In the device
A fuel supply system with a filter clogging detection device, comprising the filter clogging detection device according to any one of claims 1 to 4. In the fuel supply apparatus with a filter clogging detection device according to claim 4,
The fuel supply device with a filter clogging detection device, wherein the filter clogging detection device is disposed downstream of the filter.

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