JP3753720B2 - U-shaped strainer - Google Patents

Description

The present invention relates to a U-shaped strainer for separating and removing solid foreign matters in a fluid flowing through various piping lines.

Conventionally, this type of strainer has a bottomed cylindrical screen detachably housed inside a main body formed with a primary side flow path and a secondary side flow path, and a lid is provided at the screen outlet provided at the top of the main body. Wearing.
The lid consists of a top plate that is approximately the same diameter as the flange provided at the periphery of the outlet, and a sealing plug that is suspended from the top plate so as to fit into the outlet. The lid closes the outlet. The clamp which hold | maintains the done state is attached (for example, refer nonpatent literature 1).
In order to take out the screen on which the solid foreign matter has been collected by filtration, first loosen the bolt with the handle attached to the clamp so that the lid can be removed. The lid is removed from the main body together with the clamp, and the outlet is opened. It can be done by letting.
Edited by Japan Valve Industry Association, “Valve Manual” published by Nikkan Kogyo Shimbun, published March 30, 1965, p. 463, FIG. 7, 148, FIG. 7, 149

However, it is not easy to remove the lid from the main body because the lid stopper tightly fits into the outlet, and a flat-blade screwdriver or The tip of the iron bar is pushed in and opened, and the work is time consuming and laborious.
This means that if the strainer becomes large, the lid body becomes large and heavy, so it is necessary to widen the gap between the lid body and the main body using a plurality of iron rods, etc., which is very troublesome. It was.

In view of the above problems, the present invention provides a screen that is detachably mounted between a primary-side flow path and a secondary-side flow path provided in the main body, a screen outlet opened in the main body, and the outlet In a U-shaped strainer provided with a lid to be mounted, a screw is provided on a surface corresponding to the outlet end surface of the lid so that the screw can be freely protruded and projected from the corresponding surface, and the lid is pushed up from the outlet end surface. Remove from.
In addition, support shafts are erected on the left and right outer sides of the outlet in the main body, and the base end of the lid presser foot is pivotally attached to one of the support shafts. The other support shaft is provided with a detachable recess, and each support shaft is held in a closed state by using a clamp provided with means for pressing and holding the cover body via a cover body pressing rod .
In the case of using the clamp having the above-described configuration, it is better to attach a screw to a portion of the lid body where the rotation of the lid pressing rod is prevented by engagement of the support shaft by the concave portion.
In particular, when the lid body has a large diameter and the lid body needs to be pressed and held more firmly, the rotation progress blocking portion is set at the center of the lid body, and a pair of lid bodies on both sides of the center portion. A presser bar should be provided.
In addition, when using a plurality of screws, when turning the lid holding rod for removing the lid, all of the screws are arranged at the rotation progression prevention site, and then the screws arranged at the rotation progression inhibition site of the lid. It is preferable that at least one of them is left and the other screws are screwed into all screw holes arranged in the circumferential direction of the lid body and removed.

In short, the invention described in claim 1 includes a screen that is detachably mounted between a primary side flow path and a secondary side flow path provided in the main body, a screen outlet provided in the main body, and a screen outlet. In the U-shaped strainer provided with a lid to be attached, the screw is provided so as to be able to protrude and retract on the surface corresponding to the outlet end surface of the lid, so that when the lid is removed from the main body, it corresponds to the outlet end surface of the lid. By protruding the screw from the surface, the lid body can be pushed up from the outlet end surface, and the lid body can be easily and reliably removed from the main body.

Further, in the first aspect of the present invention , a support shaft is provided in a standing manner on the left and right sides of the lid body in the main body, and a base end of the lid body is attached to one of the spindles so as to be rotatable. A recess that can be freely engaged with and disengaged from the other support shaft is provided on one side surface of the tip, and each support shaft is provided with means for pressing and holding the lid body via a lid pressing bar. By releasing the pressure holding and rotating the lid pressing lever toward the outside of the lid, the lid can be easily and easily removed without removing the lid pressing rod and the pressing holding means from the main body. On the contrary, when the lid is pressed and held, the lid pressing lever is rotated and arranged on the lid so that the concave portion engages with the other spindle, and the lid is held by the press holding means. Because the lid is only pressed through the presser bar, the lid can be held and released quickly and easily.

In the invention according to claim 2 , since the screw is arranged at a position where the rotation of the lid pressing rod is prevented by the engagement of the lid with the other support shaft by the concave portion, the lid for removing the lid When the presser foot is turned, the cover presser foot can be smoothly rotated outwardly without colliding with the screw protruding from the upper surface of the cover body. By making it protrude, the removal operation | work of a cover body can be comprised more simply.

In the invention according to claim 3 , since the rotation progress preventing portion is set at the center of the lid, and a pair of lid pressers are provided on both sides of the central portion, when removing the lid in the same manner as described above, Since the screw projecting upward from the lid is located at the rotation-preventing portion of the lid, both lid retainers can be smoothly rotated outward from the lid, and then the lid can be removed with the screw. At the same time, the use of two lid pressing rods is effective in that the lid can be pressed and held more firmly, particularly when the lid is large.

According to a fourth aspect of the present invention , at the rotation progress preventing portion, at least one screw provided so as to be able to appear and retract on the corresponding surface, and a lid that is located elsewhere on the corresponding surface and the recess is separated from the other support shaft. Since a separate screw to be screwed into the screw hole arranged in the rotation direction of the body pressing rod is arranged, when removing the lid by screwing the screw into a plurality of locations of the lid, the lid for removing the lid When the presser bar is turned, all the screws are arranged at the rotation progress prevention part. Therefore, the cover presser bar can be smoothly rotated outward without any obstruction, and the cover is removed when the cover is next removed. Leave at least one of the screws placed in the body rotation progression prevention site, screw the other screw into the open screw hole, and attach all the screws placed in the circumferential direction of the lid to the corresponding surface So that the lid can be pushed up evenly from the outlet end face. Can simply be removed, its practical effect very large, or the like can be removed satisfactorily even heavy lid with even large.

An embodiment of the present invention will be described below with reference to the drawings.
The main body 1 of the U-shaped strainer shown in the figure has an inlet 2 and an outlet 3 on the left and right sides thereof, and a primary channel 4 and a secondary channel that communicate with the inlet 2 and the outlet 3, respectively. 5, and the primary flow path 4 and the secondary flow path 5 are partitioned vertically by a partition wall 6 provided inside the main body 1, and a communication port 7 is opened in the partition wall 6.
In the upper part of the main body 1, an outlet 9 for the screen 8 is opened so as to communicate with the primary flow path 4 and face the communication port 7 on the same axis, and the outlet end face 9 a is projected upward in a ring shape. A lid 10 is detachably attached to the outlet 9.
Note that the outlet end face 9a may be provided on the same plane as the upper part of the main body 1 without projecting annularly as described above.

The lid 10 has a disk-shaped top plate portion 10a having a diameter larger than that of the outlet 9 and a flat upper surface, and a sealed plug portion 10b that is vertically suspended so as to be fitted to the outlet 9 at the lower center of the top plate portion 10a. The O-ring 11 is mounted in an O-ring groove that is recessed around the sealing plug portion 10b.
The lid 10 is provided with a clamp 12 that holds the outlet 9 closed.

The clamp 12 is provided at the top of the main body 1 so as to stand upright on the left and right outer sides of the outlet 9.
, 13a, and the base end of the support shaft 13 is pivotably attached to the one support shaft 13, and the other support shaft is attached to one side surface of the tip.
A lid holding rod 14 provided with a recess 14a that can be freely attached to and detached from 13a, and a lid 10 through the lid holding rod 14
Press holding means 15 is provided for pressing and holding.
The lower ends of the support shafts 13 and 13a are screwed to the upper portion of the main body 1, and a fastening member 15 such as a nut as a press holding means 15 is screwed to a male screw threaded to the upper end. A spring washer 16 and a flat washer 17 are interposed between the presser bar 14 and the lower part.
In this embodiment, the pressing and holding means 15 is formed as a fastening member (eye nut) 15 provided with a retaining ring 15a for lifting the main body at the upper end, and this eye nut 15 is mounted on the support shafts 13 and 13a. Although the lid holding rod 14 is pressed and held on the lid 10 or the lid holding rod 14 is in a rotatable state by advancing and retracting, the pressing holding means 15 is an eyenut or the like. It is not limited to the fastening member 15, but may be a fastening member 15 such as a bolt provided with a head portion at the upper end of the support shafts 13 and 13a and a screw portion screwed into the upper portion of the main body 1 at the lower end. It is preferable to use an eye bolt (not shown) provided with a retaining ring 15a for lifting the main body on the head of the bolt.

Corresponding surface with the outlet end surface 9a in the top plate portion 10a of the lid 10 (the outer peripheral side lower surface of the top plate portion 10a) 10
Screws 18 and 18a are freely provided in c.
The screws 18 and 18a are used for easily removing the lid 10 from the main body 1.
A screw hole 19 formed longer than the thickness of 10 and threaded so as to penetrate vertically through the outer peripheral edge of the top plate portion 10a.
, 19a are screwed into from the upper surface side of the top plate portion 10a.
Further, it is desirable to provide two or more screws 18 and 18a at equal intervals in the circumferential direction of the lid 10 as shown in the illustrated example.
Then, in a normal time other than when the lid body 10 is removed, the support shaft 13 by the recess 14a in the lid body 10 is used.
At least one screw 18 provided in the corresponding surface 10c so as to be able to move in and out at a portion N where the rotation of the lid pressing rod 14 is blocked by the engagement with a, and a concave portion 14a at another portion of the corresponding surface 10c. A screw 19 that is screwed into a screw hole 19a that is arranged in the rotational direction X of the lid pressing rod 14 that is detached from the support shaft 13a,
When releasing the holding of the lid body 10 by the lid body holding rod 14, the screw 18 that the lid body holding rod 14 protrudes from the upper surface of the lid body 10 while the lid body holding rod 14 rotates outwardly. 18a, so that the rotation is not prevented by colliding with 18a, and the lid pressing rod 14 is moved outside the lid 10 and then provided in the rotation range of the lid pressing rod 14 on the lid 10. One screw 18a at the rotation preventing portion N is screwed into the screw hole 19a, and the lid 10 is detached from the outlet 9 with the screws 18 and 18a.

The modification of the clamp 12 shown in FIGS. 5 and 6 is used particularly when the lid 10 has a large diameter and needs to be pressed and held more firmly. Reference numerals are assigned and description is omitted.
In the clamp 12, the rotation progress preventing portion N in the lid body 10 is set at the center of the lid body 10, and a pair of lid body pressing rods 14 are provided on both sides of the central portion N.
The lid holding rods 14 are arranged in parallel as shown in FIG. 5 with the lid 10 pressed and held, and the base end and the distal end are opposite to each other. However, the base end and the tip of each lid holding rod 14 are provided at symmetrical positions, and the lid holding rod 14 is outward in the shape of a letter C. You may make it rotate.
The clamp 12 is not necessarily limited to the one shown in FIGS. 2 and 5. For example, instead of the clamp, the lid 10 is formed with a large diameter, and the outer peripheral side of the lid 10 is attached to the main body 1 with a bolt. It may be fastened.

The screen 8 is a bottomed cylindrical wire mesh, and an annular flange 8a is provided on the periphery of the opening, and a rod-like handle 8b is installed on one diameter line of the opening.
Then, the collar 8a of the screen 8 is installed on the annular step 7a provided around the communication port 7 via the seal member 20, and the ring-shaped collar holder 21 for pressing and holding the collar 8a is provided on the annular step 7a. Screwed.
The seal member 20 is a gasket disposed on the annular step 7a or an O-ring attached to an O-ring groove provided in the annular step 7a as shown in the illustrated example.
The eaves retainer 21 has a thickness substantially the same as the height of the annular stepped portion 7a, a rod-like handle 21a is installed on one diameter line of the upper opening thereof, and a male screw is threaded on the peripheral surface of the eaves retainer 21 Along with the annular step 7a
In FIG. 2, a female screw that is screwed into the corresponding portion of the male screw is threaded.

Next, the operation of the U-shaped strainer will be described.
When the main body 1 is in normal use, the lid holding rod 14 is in a state where the recess 14a is engaged with the support shaft 13a.
Is placed on the lid 10 with the outlet 9 closed, and the eye nut 15 is tightened in this state, and the lid holder 14 presses the lid 10 to keep the outlet 9 closed. ing.
When the screen 8 is cleaned, the eye nut 15 is loosened so that the lid pressing rod 14 can be rotated, and the lid pressing rod 14 is moved outward from the lid 10 so that the concave portion 14a is detached from the support shaft 13a. The lid 10 is rotated and moved so that the lid 10 can be detached from the outlet 9.
When an eyebolt is used instead of the support shafts 13 and 13a and the eyenut 15, the lid pressing rod 14 can be rotated by moving the eyebolt forward and backward with respect to the screw hole at the top of the body 1 into which the tip is screwed. The lid body 10 is fixed in such a manner that the lid body pressing rod 14 is pressed on the lid body 10.

Next, the screw 18a is removed from the rotation progress preventing portion N of the lid body 10, and is screwed into a screw hole 19a disposed in the rotation range of the lid body pressing rod 14 on the lid body 10, and the screws 18, 18a are inserted. The tip of the corresponding surface 10
The lid 10 moves away from the outlet 9 by projecting from c and continuing to project the screws 18 and 18a after contacting the outlet end surface 9a (see FIG. 4).

After removing the lid 10 from the main body 1 as described above, the handle 21a is screwed out with the handle 21a to remove it from the annular step 7a, and then the screen 8 is pulled up with the handle 8b to pull up the main body 1. Take out from.
After the screen 8 is washed, the screen 8 is stored in the main body 1 by the reverse procedure to the above.
The outlet 9 is closed by the lid 10, the lid 10 is pressed and held by the clamp 12, and all the screws 18 and 18 a are arranged in the rotation progress preventing portion N.

It is sectional drawing of a U-shaped strainer. It is a top view of a U-shaped strainer. It is a top view of the state which canceled the press with respect to the cover body by a clamp. It is an expanded sectional view which shows the removal state of the cover body by a screw. It is a top view which shows the modification of a clamp. It is a top view of the state which canceled the press with respect to the cover body by the clamp of FIG. It is an expanded sectional view which shows the attachment state of a screen. It is AA sectional drawing of FIG.

Explanation of symbols

1 Main body 4 Primary flow path 5 Secondary flow path 8 Screen
9 Exit
9a Exit end face
10 Lid
10c compatible surface
13, 13a Spindle
14 Lid holder
14a recess
15 Press holding means
18, 18a screw
19a Screw hole
N Rotation progress prevention part

Claims (4)

A U provided with a screen detachably mounted between a primary side channel and a secondary side channel provided in the main body, a screen outlet provided in the main body, and a lid attached to the outlet. A strainer , which is provided with a screw that can be protruded and retracted on a surface corresponding to the end surface of the outlet in the lid body, and a support shaft is erected on each of the left and right outer sides of the outlet in the main body. A base end of the body pressing rod is rotatably attached, and a concave portion that can be engaged with and disengaged from the other spindle is provided on one side surface of the tip of the lid pressing rod. A U-shaped strainer provided with means for pressing and holding . The U-shaped strainer according to claim 1 , wherein a screw is disposed at a portion of the lid that is prevented from advancing the rotation of the lid presser bar by engagement with the other support shaft by the concave portion . 3. The U-shaped strainer according to claim 2, wherein the rotation progress blocking portion is set at the center of the lid body, and a pair of lid body pressing rods are provided on both sides of the center portion . In the rotation progress blocking portion, at least one screw provided on the corresponding surface so as to be able to move in and out, and the other portion of the corresponding surface in the rotation direction of the lid pressing rod that the recess is detached from the other spindle. The U-shaped strainer according to claim 2 or 3, wherein a separate screw to be screwed into the arranged screw hole is arranged .

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