JPH0538811Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a strainer cleaning device that automatically cleans a strainer that is attached to the end of a suction hose and submerged in liquid in a liquid tank.

[Conventional technology]

Strainers are used in pumps used for spraying pesticides and squirting cleaning fluids.
It is attached to the end of the suction hose and submerged in the liquid in the liquid tank to prevent foreign matter such as floating matter and sediment from being sucked into the suction hose. Foreign matter adheres to the outer surface of the filter as the pump operates, clogging the filter and causing poor suction by the pump, so it is necessary to remove the foreign matter from the outer surface of the filter.

The general method for removing deposits from the filter of a strainer is to take the strainer out of the liquid tank and scrub it with a brush, but in this case, the operator must remove the deposits from the filter when the amount of deposits on the filter increases. It is necessary to always carefully observe from outside the liquid tank whether the filter needs to be cleaned, and when cleaning the strainer, stop pump operation and clean the strainer manually. Therefore, it is complicated.

Therefore, in Japanese Utility Model Publication No. 57-57774, while guiding the remaining liquid from the pump to the vicinity of the strainer,
It is ejected into a strainer, and the ejection force removes deposits from the filter of the strainer.

Furthermore, in Japanese Utility Model Publication No. 58-47934, a spout hole is provided in the frame of the strainer, the liquid discharged from the pump is introduced into the frame of the strainer, and the liquid is jetted from the spout hole of the frame toward the filter. This jetting force removes deposits from the filter of the strainer.

Further, Japanese Utility Model Publication No. 55-46286 discloses transmitting rotational power from the outside of a liquid tank to a stirring blade via a flexible shaft.

[The problem that the idea attempts to solve]

In the strainer cleaning device disclosed in Japanese Utility Model Publication No. 57-57774, since the pressure of the remaining liquid is low, the ejection force is weak and the effect of removing deposits on the filter is insufficient.

In the strainer cleaning device disclosed in Japanese Utility Model Publication No. 58-47934, the cost increases if a separate cleaning pump is provided, and if the pump is shared for spraying, the strainer must be used for spraying when cleaning the strainer. It is necessary to interrupt work, etc.

Utility Model Publication No. 55-46286 does not mention anything about the relationship between the stirring blades and the strainer cleaning device.

At the time of filing this application, the invention was not yet published.
The brush is moved by transmitting rotational power from outside the liquid tank via a flexible shaft.
A strainer cleaning device that scrapes off deposits from the filter part of a strainer has been disclosed. However, it does not suggest using an agitator blade in the strainer cleaning device to improve cleaning efficiency or suppress clogging in the filter part. For example, when inhaling a medicinal liquid, the strainer is likely to become clogged because the medicine does not dissolve sufficiently in water, so it is very important not only to remove clogging in the filter part but also to suppress clogging.

The purpose of this invention is to provide a strainer cleaning device that can effectively and automatically clean a strainer without interrupting the original work of the pump and without manual work.

Another object of this invention is to provide a strainer cleaning device that can effectively utilize stirring blades to remove deposits from the filter section.

[Means to solve the problem]

This invention will be explained using reference numerals in the drawings that correspond to the embodiments.

A strainer cleaning device according to a first aspect of the present invention includes a stirring blade 86 that is coupled to the tip of the flexible shaft 44 and rotates together with the flexible shaft 44.
A strainer 90 is disposed so as to substantially face the stirring blade 86, and a strainer 90 is connected to the tip of the flexible shaft 44 and rotates relative to the strainer 90 together with the flexible shaft 44 so as to rotate the filter portion 96 of the strainer 90. and a brush 112 for scrubbing.

The strainer cleaning device according to claim 2 further includes a flexible tube 50 which is inserted through the flexible shaft 44 and is fixed against rotation of the flexible shaft 44, and a distal end portion of the flexible tube 50. It has protective frames 80 and 82 which are fixed and house stirring blades 86 and a strainer 90 inside. The strainer 90 is protected by protective frames 80 and 8.
It is fixed at 2.

The strainer cleaning device according to claim 3 further includes a flow guiding member 114 that directs the liquid flow generated by the stirring blades 86 along the surface of the filter portion 96 of the strainer 90.

In the strainer cleaning device according to the fourth aspect, the base end of the flexible shaft 44 is coupled to the rotating shaft 16 of the power sprayer 14.

[Action]

In the invention of claim 1, the flexible shaft 44 transmits rotational power to its tip, and the stirring blade 86 and the brush 112 rotate. The rotation of the stirring blade 86 stirs the liquid. The brush 112 rotates relative to the filter portion 96 of the strainer 90 by the rotational power from the flexible shaft 44, and scrapes off deposits on the filter portion 96. The rotation of the stirring blade 86 generates a liquid flow that passes near the filter portion 96 of the strainer 90, and this liquid flow carries the deposits separated from the filter portion 96 by the brush 112 to another location.

In the invention of claim 2, the strainer 90 is fixed to the flexible tube body 50 via the protective frames 80 and 82, and as a result, the strainer 90 is fixed against rotation of the flexible shaft 44 and the brush 112.

In the third aspect of the present invention, the liquid flow generated by the rotation of the stirring blade 86 hits the flow guide member 114 and is converted into a direction along the surface of the filter portion 96 of the strainer 90 . This liquid flow is applied to the brush 1
without pushing the deposits separated from the filter part 96 by the rubbing of step 12 toward the filter part 96.
It is effectively carried to a location away from the filter section 96.

The invention of claim 4 provides a flexible shaft 44.
transmits the rotational power of the rotating shaft 16 of the power sprayer 14 to the stirring blades 86 and the brush 112.

〔Example〕

This invention will be described below with reference to embodiments shown in the drawings.

FIG. 2 is an overall configuration diagram of the pump device including the strainer cleaning device. The liquid tank 10 stores the liquid 12, the power sprayer 14 includes an engine and a pump driven by the engine, and the crankshaft 16 is rotated by the power from the engine as a driving part of the pump. Suction hose 18 and discharge hose 20
are connected to the suction port and discharge port of the power sprayer 14, respectively, and the liquid 12 in the liquid tank 10 is connected to the suction hose 18.
It is then sent through the discharge hose 20 to, for example, a gun nozzle 22 at the tip end of the discharge hose 20, and is ejected from the gun nozzle 22. Flexible shaft device 2
4 is connected to the crankshaft 16 on the base end side, and a strainer/stirring device 26 is sunk to the bottom of the liquid tank 10 and is connected to the suction hose 18 and the tip of the flexible shaft device 24.

Figure 1 shows the flexible shaft device 2 in Figure 2.
4 and a detailed structural diagram of the strainer/stirring device 26. The sleeve 28 is attached to the crankshaft 16 in FIG.
and is inserted into the hole at the proximal end of the coupling ring 30. The hexagon socket head bolt 32 is
The coupling ring 30 is disposed with its axial direction facing the radial direction of the coupling ring 30, and engages with the crankshaft 16 at its tip,
To prevent the crankshaft 16 from coming off from the coupling ring 30. The bearing case 34 is disposed so as to surround the distal end of the coupling ring 30, and is supported by the coupling ring 30 by a bearing 36 so as to be rotatable relative to the coupling ring 30. Snap rings 38 and 40 are connected to the inner periphery of bearing case 34 and coupling ring 30, respectively.
The bearing 3 in the axial direction is fitted on the outer periphery of the
6 to prevent displacement. The cover 42 is fixed to the bearing case 34 and surrounds the coupling 30 and the outside of the bearing case 34 .

The flexible shaft 44 is connected to the coupling 3
Coupling 30 rotates integrally with 0.
The proximal end is fixed to the distal end of the The flexible tube 46 is inserted through the flexible shaft 44 with a gap that allows relative rotation to the flexible shaft 44, and is fixed to the inner periphery of a flexible reinforcing pipe 48. flexible hose 50
further surrounds the outside of the reinforcing pipe 48 to prevent liquid from entering inside. Rigid pipe 52
covers the flexible hose 50 in a predetermined range of the portion of the flexible hose 50 on the coupling ring 30 side, and its base end side is inserted into the hole on the tip side of the bearing case 34. The push case 54 is disposed at the tip of the bearing case 34 and has a pin 56.
is disposed in the push case 54 so as to be freely displaceable in the radial direction of the rigid pipe 52, and a push nut 58 is fixed to the outer end. Compression coil spring 6
0 biases the pin 56 in the direction in which the tip of the pin 56 is inserted into the insertion hole of the rigid pipe 52. When the push nut 58 is grasped and the tip of the pin 56 is pulled out from the insertion hole of the rigid pipe 52, the flexible hose 5
0 and the rigid pipe 52 can be removed from the bearing case 34, and when the tip of the pin 56 is inserted into the insertion hole of the rigid pipe 52, the rigid pipe 52 is fixed to the bearing case 34 in the circumferential direction and longitudinal direction. be done.

The propeller shaft 62 has its base end fixed to the distal end of the flexible shaft 44 and rotates integrally with the flexible shaft 44, and the protection plate 64 is fixed at the point where the flexible shaft 44 starts to be exposed from the propeller shaft 62. Ru.
The propeller shaft case 66 has a protective plate 64
The oil-impregnated metal 68 surrounds the outer circumferential side of the propeller shaft 62 and the propeller shaft case 66.
It is interposed between the inner peripheral side of the Locknut 7
0 is inserted through the flexible hose 50, screwed onto the propeller shaft case 66, and fitted with the locking rubber 7.
2 is crimped onto a flexible hose 50. The oil seals 74, 74 are attached to the propeller shaft case 6.
The oil seal ring 76 is interposed between the propeller shaft 62 and the propeller shaft case 66 on the distal end side of the propeller shaft 62 and supports the two so that they can rotate relative to each other. Maintains the spacing between. The cover nut 78 is screwed onto the tip side of the propeller shaft case 66.

First cage part 80 and second cage part 82
are made of rods that are connected to each other by bolts 84 so as to form a certain accommodation space inside them, and define a plurality of windows that are large enough to communicate between the inside and the outside. The stirring blade 86 is disposed within the first cage section 80 and the second cage section 82 and is integrally fixed to the tip of the propeller shaft 62 by a hexagonal bolt 88. The strainer 90 has a first end wall member 92 and a second end wall member 94 facing each other and separated from each other by a predetermined distance in the axial direction, and a first end wall member 92 at both ends.
and a tube 95 fixed to the center of the second end wall member 94, and a tube 95 fixed to the peripheral portions of the first end wall member 92 and the second end wall member 94 at both ends.
A cylindrical net body 96 coaxial with respect to the net body 96 is provided. The pipe 95 has a hole that communicates between the inside and outside, and an outlet 97
is formed in the center of the second end wall member 94 facing the opening on one end side of the pipe 95, and is connected to the suction hose 1 in FIG.
The end of 8 is attached. The tightening bolts 98 are connected to the first end wall member 92, the second end wall member 94, and the second end wall member 92.
The nut 1 is inserted through the cage portion 82 and at the tip.
00 is screwed together, and the first end wall member 92 etc. are connected to the pipe 95.
is tightened in the axial direction, and the strainer 90 is fixed to the second cage portion 82.

The tip shaft 101 is integrally fixed at the tip of the propeller shaft 62 in the rotating direction of the propeller shaft 62, and the bearing 102 is interposed between the tip shaft 101 and the bearing case 104, which are coaxial with each other, and rotates both. I freely support it.
The oil seal 106 is arranged parallel to the bearing 102 between the tip shaft 101 and the bearing case 104, and prevents oil from leaking from the bearing 102 side. The hex bolt 108 fastens the bearing case 104 to the first end wall member 92, and the rod 110 extends at right angles, has one end fixed to the tip shaft 101, and has the other end near the first end wall member 92. There is. The brush 112 has a length equal to the entire length of the net 96 in the axial direction of the net 96, is fixed to the other end of the rod 110, and is configured to slide on the outer peripheral surface of the net 96 in the circumferential direction of the net 96. It's summery.

The operation of the embodiment will be explained.

During operation of the power sprayer 14, the crankshaft 16 rotates, and this rotation is caused by the flexible shaft device 24.
is transmitted to the propeller shaft 62 via the flexible shaft 44, and the stirring blade 86 rotates. The rotation of the stirring blade 86 causes the drug 1 in the liquid tank 10 to
2 is stirred to improve the mixing state of the medicine and water, and prevent the medicine as a solid content contained in the medicine body 12 from clogging the mesh body 96 of the strainer 90. Also, due to the rotation of the stirring blade 86, the net body 96
A liquid flow along the axial direction of the strainer 90 is generated around the periphery of the strainer 90 .

Brush 112 is coupled to propeller shaft 62 via rod 110 and
rotates integrally with. On the other hand, the strainer 90 is
It is fixed to the flexible hose 50 via the second cage part 82 and the first cage part 80. Therefore, the brush 112 is connected to the mesh 9 of the strainer 90.
sliding the outer surface side of 6 against the net body 96 in the circumferential direction,
The deposits adhering to the net body 96 are rubbed off from the net body 96. This scraped off deposit is removed from the net body 9 by the aforementioned liquid flow generated by the stirring blade 86.
Take him to a place far away from 6.

The first and second cage parts 80 and 82 are the mesh body 96 of the strainer 90, the brush 112, and the stirring blade 86.
etc., the mesh body 96, brush 112, stirring blade 86, etc. of the strainer 90 are covered with the liquid tank 10.
It is protected from collisions with the inner wall, etc., and performance is maintained.

3 to 6 relate to a strainer cleaning device that is a further improvement of the strainer cleaning device shown in FIG.

3 and 4 are longitudinal and transverse cross-sectional views of the first cage section 80 and the second cage section 82, viewed from inside. The bolt 84 is attached to the first cage portion 8
0 and the second cage part 82 at the joint part of the first cage part 82.
a first cage part 80 from the outside of the cage part 80;
The second cage part 82 and the flow guide plate 114 are inserted in order, and the nut 116 is screwed together to fix the first cage part 80 and the second cage part 82 to each other, and the flow guide plate 114 is inserted into the first cage part 80 and the second cage part 82. It is fixed to the cage part 80 and the second cage part 82.

5 and 6 are a front view and a side view of the flow guide plate 114. The flow guide plate 114 includes a fixing part 118 that is fixed against the second cage part 82, and a fixing part 1 that is tilted at a predetermined angle with respect to the fixing part 118.
The insertion hole 122 is formed in the center of the fixing part 118,
A bolt 84 such as that shown in FIG. 3 is inserted therethrough.

In the strainer cleaning device equipped with the flow guide plate 114 shown in FIGS. 3 to 6, the liquid flow generated by the rotation of the stirring blade 86 is integrally connected to the joint between the first and second cage parts 80 and 82. When it hits the inclined portion 120 of the flow guide plate 114 fixed to the flow guide plate 114, the direction is changed toward the net 96, and the flow becomes along the surface of the net 96 in the axial direction of the strainer 90. In this way, the liquid flow efficiently entrains the deposits separated from the net 96 by the rubbing of the brush 112 to a location away from the net 96.

[Effect of idea]

In the first aspect of the present invention, the brush is rotated relative to the strainer by rotational power transmitted through the flexible shaft, and scrubs off deposits on the filter portion of the strainer. Therefore, manual removal of deposits becomes unnecessary, and maintenance becomes easy. In addition, the strainer is located in a position facing the stirring blades, and the liquid flow generated by the stirring blades passes near the filter section and effectively removes the deposits scraped off from the filter section by the brushes. The removal effect becomes higher. Since rotational power is transmitted to the stirring blades and brushes from a common flexible shaft, the number of parts constituting this strainer cleaning device is reduced, and
The structure of the strainer cleaning device becomes simple.

In the second aspect of the present invention, in order to fix the strainer against rotation of the brush, the strainer is fixed via a protective frame to a flexible tube in which the flexible shaft is passed. Therefore,
A stopper or the like for fixing the strainer to the wall of the liquid tank can be omitted.

In the third aspect of the present invention, the flow guide member causes the flow of the liquid produced by the rotation of the stirring blade in a direction along the surface of the filter portion of the strainer. Therefore, the deposits separated from the filter section by the brush are effectively carried away by the liquid flow to a location away from the filter section, improving the cleaning effect.

In the invention of claim 4, since the rotational power of the rotating shaft of the power sprayer is also used to drive the stirring blades and brushes, there is no need to add a new power source, and the configuration of the apparatus is simplified.

[Brief explanation of drawings]

The drawings relate to an embodiment of this invention, and FIG.
Figure 2 is a detailed structural diagram of the flexible shaft device and strainer-cum-stirring device shown in the figure, Figure 2 is an overall configuration diagram of the pump device including the strainer cleaning device, and Figures 3 to 6 are further details of the strainer cleaning device shown in Figure 1. Regarding the improved example, Figures 3 and 4 are similar to Figure 1.
A vertical cross-sectional view and a cross-sectional view of the cage portion and the second cage portion viewed from the inside, and FIGS. 5 and 6 are a front view and a side view of the flow guide plate. 14... Power sprayer, 16... Crankshaft (rotating shaft), 44... Flexible shaft, 50...
...Flexible hose (flexible tube body), 80... First cage part (protective frame body), 82... Second cage part (protective frame body), 86... Stirring blade, 90... Strainer, 96... Net body (filter part), 112...
Brush, 114... Current guide plate (current guide member).

Claims (1)

[Claims for Utility Model Registration] (1) A stirring blade 86 that is connected to the tip of the flexible shaft 44 and rotates together with the flexible shaft 44, and a strainer 90 that is disposed so as to substantially face the stirring blade 86.
and a brush 112 that is coupled to the tip of the flexible shaft 44 and rotates relative to the strainer 90 together with the flexible shaft 44 to scrub the filter portion 96 of the strainer 90. Strainer cleaning device. (2) A flexible tube 50 inserted through the flexible shaft 44 and fixed against rotation of the flexible shaft 44, and a stirring tube fixed to the tip of the flexible tube 50 inside. 2. The strainer cleaning device according to claim 1, comprising blades 86 and protective frames 80, 82 that house the strainer 90, and wherein the strainer 90 is fixed to the protective frames 80, 82. (3) Claim 1 or 2 further comprising a flow guide member 114 that directs the liquid flow generated by the stirring blade 86 along the surface of the filter portion 96 of the strainer 90. Strainer cleaning device as described. (4) The strainer cleaning device according to any one of claims 1 to 3, wherein a base end portion of the flexible shaft 44 is coupled to a rotating shaft 16 of a power sprayer 14.