JP4536600B2 - strainer - Google Patents

Description

  The present invention relates to a strainer for filtering solids in a liquid supplied to a pump or the like.

  When a pump sucks liquid from an outdoor liquid source, solids such as sand from the liquid source may be sucked together with the liquid, and this pressure causes the pressure liquid generating part of the pump to wear. A strainer is provided in the liquid supply path (see, for example, Patent Documents 1 and 2).

  The strainer of Patent Document 1 is connected in the middle of the liquid supply path, and is a hydraulic pressure control valve connected in the middle of a delivery path for sending the pressure liquid generated by the pump to a liquid injection unit such as a nozzle. The liquid introduction cylinder connected to the return path of the liquid is removed, and the solid matter adhering to the peripheral surface of the filter is removed from the filter by ejecting the pressure liquid introduced into the liquid introduction cylinder inside the filter. Is configured to do.

The filter of Patent Document 2 is connected in the middle of the liquid supply path, has a plurality of injection ports, and introduces a part of the pressure liquid generated by the pump into the filter, A handle or an electric motor for rotating the liquid introduction cylinder, and the liquid introduction cylinder is rotated by the handle or the electric motor while the pressure liquid introduced into the liquid introduction cylinder is jetted inside the filter, and the peripheral surface of the filter It is comprised so that the solid substance adhering to may be removed from a filter.
JP 2004-202314 A Japanese National Patent Publication No. 11-509771

  However, the strainer of Patent Document 1 has a problem that the entire surface of the filter cannot be cleaned because the pressurized liquid introduced from the return path is only ejected inside the filter. In addition, the strainer of Patent Document 2 requires a driving device such as a handle for driving the liquid introduction cylinder and an electric motor, and there is a problem that the strainer is large and expensive, and the handle is operated. In order to do so, a controller for driving and controlling the electric motor is required.

  The present invention has been made in view of the circumstances as described above, and a main object thereof is to efficiently clean the entire surface of the filter by providing a rotating body that generates a rotating force by jetting a cleaning pressure liquid. It is another object of the present invention to provide a strainer that can clean a filter automatically without requiring special equipment.

  Another object of the present invention is to provide a strainer that can clean the filter over the entire length and the entire circumference by the rotation body having one injection port by forming the injection port as a slit penetrating along the longitudinal direction of the rotation body. Is to provide.

  Another object of the present invention is to provide a strainer that can rotate and rotate the rotating body even when the pressure of the cleaning pressure liquid is relatively low by providing an introduction cylinder that externally supports the rotating body and introduces liquid. Is to provide.

  Another object is to provide a through-hole for assisting the rotation of the rotating body in the introduction cylinder, thereby further improving the rotating performance of the rotating body, and when the pressure of the cleaning fluid is relatively low. Is to provide a strainer capable of rotating the rotating body.

  Another object of the present invention is to provide a spherical body that has a cylindrical shape and supports the end of the rotating body that is externally supported by the introduction cylinder so as to freely rotate. An object of the present invention is to provide a strainer that can rotate a rotating body even when the pressure of the liquid is relatively low.

The strainer according to the present invention includes a cylindrical filter that filters solids in a liquid supplied to a pump, a holding body that holds the filter, and a cleaning pressure liquid that cleans the filter. In the strainer having the liquid introduction part to be introduced into the liquid introduction part, one end of the liquid introduction part is attached to the holding body, and the introduction cylinder disposed inside the filter, and the outer introduction fitting so as to be rotatable. And a cylindrical rotating body having an injection port for injecting the cleaning pressure liquid and generating a rotating force by a reaction force of the injection, and an annular cavity between the rotating body and the peripheral surface of the introducing cylinder In the circumferential surface of the introduction tube, the cleaning pressure liquid penetrating at a position deviated from one radial line and flowing into the cavity is rotated in the rotation direction of the rotation body. and having a plurality of through-holes to be distributed in the cavity

In the present invention, the cleaning pressure liquid introduced into the liquid introducing portion is sprayed from the injection port to generate a rotation force, and the rotation body rotates automatically by this rotation force, and the entire filter is automatically cleaned. Therefore, the filter can be efficiently cleaned without requiring special labor and power, and the maintenance period of the filter can be made relatively long.

Further, in the present invention, since the cleaning pressure fluid that has flowed out from the through hole of the introduction cylinder into the cavity of the rotation body flows in the rotation direction of the rotation body in the cavity, the rotation of the rotation body can be assisted. The rotation of the rotating body can be further improved, and the rotating body can be rotated even when the pressure of the cleaning pressure liquid is relatively low.

According to the present invention, the rotation of the by that rotation body liquid for washing, without the need for special equipment, filters can be cleaned automatically, relatively long maintenance period of the filter Rutotomoni is possible to, the strainer can be small in size. Moreover, since the rotation of the rotating body can be assisted by the cleaning pressure fluid that has flowed into the annular cavity from the through hole of the introduction cylinder, the rotation of the rotation body can be improved, and the pressure of the cleaning pressure fluid can be improved. The rotating body can be rotated even when is relatively low.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof. 1 is a longitudinal front view showing the structure of the strainer according to the present invention, FIG. 2 is a sectional view taken along the line II-II in FIG. 1, FIG. 3 is a plan view showing the structure of the strainer, and FIG. 4 is a liquid in which the strainer is used. It is a schematic diagram of an injection device.

  The strainer A includes, for example, a pump P that supplies liquid from a liquid source B such as a tank from a liquid supply path C, a nozzle N that is connected to a delivery path D that sends out the pressure liquid generated by the pump P, and a delivery path. The total amount of pressurized fluid in the delivery channel D when the pressurized fluid force in the delivery channel D exceeds a set value, such as when the pressurized fluid force in the delivery channel D is set and the nozzle is closed Is connected to a liquid supply path C of a liquid ejecting apparatus including an unloader valve F that returns the gas to the return path E. The unloader valve F reduces the pressure hydraulic force in the delivery path D to the pressure hydraulic force generated by the pump when there is no load and returns it to the return path E when the pressure hydraulic pressure in the delivery path D exceeds a set value. It has the function to do.

  The strainer A has a bottomed cylindrical shape, the filter 1 that filters solids in the liquid supplied to the liquid supply path C, and the filter 1 that holds the filter 1 on the inside and is filtered by the filter 1. A holding body 2 having a delivery port 2a for sending the liquid to the pump P and a liquid introduction part 3 connected to the return path E and introducing a cleaning pressure liquid for washing the filter 1 inside the filter 1 are provided.

  The holding body 2 is connected to the inlet side of the liquid supply path C, is connected to the inlet port 2b passing through in the radial direction and the outlet side of the liquid supply path C, and is connected to the outlet port 2a passing through in the radial direction and one end of the central portion. A first cylindrical body 21 having a fitting hole 2c and having a cylindrical shape; one end coupled to the other end of the first cylindrical body 21; a second end having a relatively small diameter opening 22a; And a second cylindrical body 22 formed.

  The first cylindrical body 21 has a large-diameter cylindrical portion 21a that is closed at one end and substantially the same diameter as the second cylindrical body 22, and a small-diameter cylindrical portion 21b that is closed at one end and smaller in diameter than the second cylindrical body 22, and has a large diameter. A supply port 2b is opened in the cylindrical portion 21a, and a delivery port 2a is opened in the small diameter cylindrical portion 21b. The outlet 2a is provided on one radial line X, while the inlet 2b is a position deviated from the radial line X and provided parallel to the radial line X. The liquid flowing into the first cylinder 21 from the supply port 2b is swirled in an annular passage between the large-diameter cylinder part 21a and the small-diameter cylinder part 21b, and the swirling liquid flow in the second cylinder 22, in other words, the filter 1 It is configured to occur around the outside.

  Four ribs 22b are provided on the inner side of the other end of the second cylindrical body 22 so as to project away from each other in the circumferential direction, and the bottom of the filter 1 is fitted and supported by the ribs 22b. Further, there is a space communicating with the opening 22a between the ribs 22b and between the filters 1, so that the solid matter removed from the peripheral surface of the filter 1 falls into the opening 22a. . Although not shown, a cock for discharging the solid matter is attached to the opening 22a.

  The filter 1 includes a small-diameter mesh portion 1a having a coarse mesh, a large-diameter mesh portion 1b having a fine mesh, and a bottom portion 1c made of a flat plate. Openings of 1a and large-diameter net 1b are connected by a connecting ring.

  One end of the liquid introduction part 3 is fitted and fixed in the fitting hole 2c, and rotates around the introduction cylinder 31 arranged at the center of the small diameter cylinder part 21b and the second cylinder 22 and the outer peripheral surface of the introduction cylinder 31. A rotating body 32 having an injection port 33 that is freely fitted and supported, injects the cleaning pressure liquid, and generates a rotation force by a reaction force of the injection. The introduction cylinder 31 and the rotation body 32 have a cylindrical shape, and an annular cavity 34 is provided between the circumferential surfaces of the rotation body 32 and the introduction cylinder 31.

  The introduction cylinder 31 has a plurality of through holes 31a on the peripheral surface, the other end is closed, and the tip of the return path E is connected to the inside of one end. Further, a fitting portion 31b is provided on the outer periphery of the other end of the introduction tube 31, and the other end of the rotating body 32 is externally fitted to the fitting portion 31b so as to freely rotate. The through holes 31 a are provided at two circumferential positions of the introduction cylinder 31 so as to be separated in the longitudinal direction of the introduction cylinder 31. Further, the through hole 31a is located at a position deviated from one radial direction line X, and is provided in parallel with the radial direction line X, so that the cleaning pressure liquid in the introduction cylinder 31 passes through the cavity 34 from the through hole 31a. When flowing out, the cleaning pressure fluid is configured to flow in the direction of rotation of the rotating body 32. That is, the rotation direction of the rotating body 32 is an obtuse angle and the anti-rotation direction is an acute angle with respect to the hole core of the through hole 31a, and the cleaning pressure fluid flowing out from the through hole 31a into the cavity 34 flows. The resistance flows to the obtuse angle side where the resistance is reduced.

  The rotating body 32 has inward flange portions 32 a and 32 b at both ends of the cylindrical portion, and the cavity 34 is formed by fitting the flange portions 32 a and 32 b to the introduction tube 31. The injection port 33 includes a slit that penetrates in the radial direction along the longitudinal direction of the rotating body 32 and is provided at two circumferential positions. Each of the injection ports 33 is located at a position deviated from the radial direction line X, and is provided in parallel with the radial direction line X, and the cleaning pressure liquid in the cavity 34 flows from the injection port 33 into the filter 1. A rotation force is generated by the reaction force of the injection when injected toward the circumferential surface. Further, the other end of the rotating body 32 has a lid portion 32c that closes the flange portion 32b, and a spherical body 4 that comes into contact with the bottom portion of the filter 1 is provided in a spherical concave portion 32d provided at the center of the lid portion 32c. The spherical body 4 supports the other end of the rotating body 32 to the bottom of the filter 1 so as to freely rotate.

  In the strainer A configured as described above, for example, as shown in FIG. 4, the inlet 2 b and the outlet 2 a are connected in the middle of the liquid supply path C of the liquid ejecting apparatus, and the introduction cylinder 31 is provided at the tip of the return path E. One end is connected. When the pump P is driven, the liquid from the liquid source B is sucked into the suction port of the pump P through the liquid supply path C and the filter 1 of the strainer A, and the pressure liquid generated by the pump P is sent out from the delivery path D and the unloader valve F. Then, it is delivered to the nozzle N and injected from the nozzle N to the outside. When the nozzle N is closed, the pressure liquid generated by the pump P is returned from the unloader valve F through the return path E to the liquid introduction part 3 of the strainer A as cleaning pressure liquid.

  The cleaning pressure fluid flows into the cavity 34 from the through hole 31 a through the introduction cylinder 31, and is sprayed from the injection port 33 to the peripheral surface of the filter 1 through the cavity 34 and adheres to the peripheral surface of the filter 1. The solid matter that is present is removed from the filter 1. Further, the cleaning pressure liquid is ejected from the injection port 33 to generate a rotation force, and the rotation body 32 rotates in the direction of the arrow in FIG. The filter 1 can be sprayed uniformly and evenly on the entire circumferential surface of the filter 1, and the solid matter adhering to the circumferential surface of the filter 1 can be efficiently removed from the filter 1. In addition, since the cleaning pressure liquid flowing out from the through hole 31a into the cavity 34 flows in the rotation direction of the rotation body 32, the rotation force of the rotation body 32 can be assisted by this distribution force, and only the reaction force of the injection. The rotation performance of the rotation body 32 can be improved as compared with the case where the rotation body 32 rotates, and the rotation body 32 can be rotated even when the pressure of the cleaning pressure liquid is relatively low. Further, the solid matter removed from the peripheral surface of the filter 1 falls from the inside of the second cylinder 22 through the space between the ribs 22b to the opening 22a, is stored in the opening 22a, and is attached to the opening 22a. The solid matter can be discharged to the outside by opening as appropriate.

  In addition, in embodiment mentioned above, it was set as the structure which has several injection port 33, However, the injection port 33 may be one other. Moreover, although it was set as the structure which has the injection port 33 which consists of slits, the injection port 33 is the structure by which the through-hole 31a, such as a round hole and a long hole, was arranged in the some longitudinal direction position of the autorotation body 32. Also good. Further, the ejection port 33 may be provided in a spiral manner in the longitudinal direction of the rotation body 32 in addition to being provided linearly in the longitudinal direction of the rotation body 32.

  Further, the strainer A according to the present invention may be connected to the starting end of the liquid supply path C in addition to being connected in the middle of the liquid supply path C of the liquid ejecting apparatus. Further, the cleaning pressure liquid is introduced from the return path E of the unloader valve F, but is connected to the delivery path D to adjust the hydraulic fluid force in the delivery path D, and A part or all of the pressure fluid may be introduced from the return path of the pressure regulating valve that returns to the return path as surplus water, or may be introduced from a valve such as the delivery path D or the unloader valve F. May be introduced.

It is a vertical front view which shows the structure of the strainer which concerns on this invention. It is sectional drawing of the II-II line of FIG. It is a top view which shows the structure of the strainer which concerns on this invention. It is a schematic diagram of the liquid ejecting apparatus in which the strainer according to the present invention is used.

Explanation of symbols

A strainer 1 filter 2 holder 3 liquid introduction part 31 introduction cylinder 31a through hole 32 autorotation body 33 injection port 34 cavity 32c lid part 4 sphere P pump

Claims (1)

A cylindrical filter that filters solids in the liquid supplied to the pump, a holding body that holds the filter , and a liquid introduction unit that introduces cleaning pressure fluid for cleaning the filter into the filter. In the strainer, the liquid introducing portion has one end attached to the holding body, an introduction cylinder disposed inside the filter, a fitting fitting that is rotatably fitted to the introduction cylinder, and the cleaning pressure. injecting a liquid, and a reaction force by the rotation of the tubular having the injection port for generating a rotation force of the injection, has a annular cavity between the peripheral surface of the free-rotating body and the introduction tube, wherein A plurality of cleaning pressure fluids that penetrate through the circumferential surface of the introduction cylinder at a position deviated from one radial direction line and flow out into the cavity in the rotation direction of the rotation body. A strainer having a through hole .

Images