Side open strainer

Abstract

The present invention relates to a side-opening strainer, and provides a side-opening strainer that allows the branch pipe into which the strainer's filter is inserted to be opened and closed from the upper side so that the filter can be easily cleaned or replaced even when the installation space of the strainer is narrow, and allows the valve to maintain its current state when the valve is open or closed so that noise or vibration caused by the valve shaking or coming into contact with the inside of the connecting pipe due to the flow of fluid can be eliminated. The present invention for achieving the above objective comprises: a connecting pipe formed with an inlet on one side and an outlet on the other side, connected in a straight line to a pipe; a branch pipe comprising a branch body formed at a certain angle from the connecting pipe while communicating with the connecting pipe, an opening hole formed to open the interior of the branch body, and a cover installed to cover the opening hole and to enable the interior of the branch body to be opened and closed; a filter mesh installed inside the branch pipe to filter impurities contained in the fluid passing through the connecting pipe and configured to be easily separated from the branch pipe through the opening hole; and a valve rotatably installed on the connecting pipe to control the fluid flow into the branch pipe by opening and closing the inlet of the branch pipe.

Description

Technology Field

[0001] The present invention relates to a side-opening strainer, which allows the filter inside the strainer to be easily cleaned and replaced even when the installation space of the strainer is narrow, thereby preventing obstruction of fluid flow, and has an opening / closing valve formed integrally to allow the fluid flow to be opened / closed as needed. Background Technology

[0002] Generally, valves are installed at designated locations in piping systems that transport various fluids, such as oil, water, gas, and steam, to shut off the fluid or appropriately regulate the flow rate as needed.

[0003] Meanwhile, if foreign substances such as dust enter the interior of the piping from the outside or if foreign substances are included in the fluid due to other reasons, it not only damages major equipment in the piping and shortens its lifespan but also causes the piping to become clogged.

[0004] To solve these problems, a strainer is installed near the main equipment of the piping to filter out foreign substances inside the piping and to regularly remove the filtered foreign substances so that the main equipment does not get clogged.

[0005] The strainer mentioned above is generally used by connecting it to the front of a major device in the middle of a piping through which fluid flows. Depending on its shape, there are various types such as Y-type, U-type, and T-type, but among them, the Y-type strainer is the oldest and most widely used.

[0006] These strainers filter out foreign substances through a filter installed inside, and if the filter's function deteriorates after a certain period of use, the filter must be cleaned or replaced.

[0007] The above filter is typically used by removing the cap installed along the length of the strainer, cleaning the filter, or inserting a new filter.

[0008] However, if the installation space for the strainer is narrow or if it is installed adjacent to a wall or floor, there is a problem in that the filter cannot be replaced because there is insufficient space to remove the filter after separating the cap, and consequently, the valve is damaged or the pipe is blocked. Prior art literature

[0009] Registered Patent No. 10-1114465 Registered Patent No. 10-2228193 The problem to be solved

[0010] The objective of the present invention to solve the above-mentioned problems is to provide a side-opening strainer that allows the branch pipe into which the strainer's filter is inserted to be opened and closed from the upper side, thereby enabling easy cleaning or replacement of the filter even when the installation space of the strainer is narrow, and allows the valve to maintain its current state when the valve is open or closed, thereby eliminating noise or vibration caused by the valve shaking or coming into contact with the inside of the connecting pipe due to the flow of fluid. means of solving the problem

[0011] The present invention, which performs the task of achieving the aforementioned objectives and eliminating the drawbacks of conventional methods, is characterized by comprising: a connecting pipe having an inlet formed on one side and an outlet formed on the other side and connected in a straight line to a pipe; a branch pipe comprising a branch body formed at a certain angle inclined from the connecting pipe while communicating with the connecting pipe, an opening hole formed to open the interior of the branch body, and a cover installed to cover the opening hole and capable of opening and closing the interior of the branch body; a filter mesh installed inside the branch pipe to filter impurities contained in the fluid passing through the connecting pipe and configured to be easily separated from the branch pipe through the opening hole; and a valve rotatably installed on the connecting pipe to control the fluid flow into the branch pipe by opening and closing the inlet of the branch pipe.

[0012] In addition, the valve comprises: a sleeve body having a hollow formed in the center; a rotation guide groove formed concavely along the rotation radius of the sleeve body inside the sleeve body; a pair of vertical guide grooves formed concavely at both ends of the rotation guide groove, having a depth deeper than the depth of the rotation guide groove and extending downward in the direction of the sleeve body; and a slot-shaped through hole formed along the rotation radius of the sleeve body at the bottom so as to communicate with the hollow; a stem inserted into the interior of the sleeve to open and close the valve through axial rotation and fixed in the opened / closed position; and a rocker installed perpendicular to the stem and configured to be continuously pressed toward the inner wall of the sleeve by an elastic spring while fitted into the rotation guide groove, and configured such that when the stem rotates at a certain angle, it is fitted into the vertical guide groove, and when the stem is pressed downward, the vertical guide groove is inserted downward to restrain the stem in a rotated state. It is characterized by comprising an opening / closing part that is installed to be fitted onto the stem through the through hole of the sleeve and rotates in conjunction with the rotation of the stem to open and close the inlet of the branch pipe.

[0013] Additionally, a pair of locking protrusions are further formed on the lower part of the stem so as to be spaced apart along the circumferential direction of the stem, and the opening / closing part is characterized by being composed of a stem coupling part that is fitted to the outside of the stem and is installed to be fitted between the pair of locking protrusions through a fitting protrusion formed on the inside so as to be able to rotate in conjunction with the rotational direction of the stem, a connecting shaft that is inserted through a through hole of the sleeve and connected to the stem coupling part, and a disc installed at the other end of the connecting shaft to open and close the inlet of the branch pipe.

[0014] In addition, it is characterized by further including a spring installed to surround the outer surface of the stem inside the sleeve, with one end connected to the inner wall of the sleeve and the other end connected to the stem, so that the stem has a tendency to rotate toward the opening direction of the branch pipe, thereby facilitating the opening of the valve.

[0015] In addition, the installation groove is formed in a concave shape in the inward direction of the stem along the rotational radius of the stem to secure an installation space for the spring, and the spring is installed at the location of the installation groove.

[0016] In addition, the above-described cover is characterized by having one end fitted into the inside of the opening hole through a locking projection formed on one end, while the other end is connected to the branch pipe through a fastening member, and a sealing material is interposed at the contact portion between the cover and the branch pipe.

[0017] In addition, the above-mentioned cover is characterized by having a transparent window formed therein to check the clogging status of the filter mesh installed inside the branch pipe. Effects of the invention

[0018] As explained above, according to the present invention, the strainer configured in this manner is configured to open the side of the branch pipe, so that the filter mesh inside the strainer can be easily replaced even when the installation space of the strainer is narrow, thereby providing excellent usability.

[0019] In addition, the filter screen can be easily replaced while the fluid flow to the branch pipe is blocked through the valve, and since the valve has a tendency to rotate in a continuously open direction due to the spring, it remains open without moving even with fluid flow, thereby preventing noise.

[0020] In addition, when closing the branch pipe through the valve, the locker provided in the valve is inserted into the locker insertion part formed in the sleeve, thereby maintaining the closed state of the valve, which is a very useful invention that facilitates easy replacement of the filter screen of the branch pipe. Brief explanation of the drawing

[0021] FIG. 1 is an exploded perspective view showing a strainer according to the present invention. FIG. 2 is a perspective view showing a valve according to the present invention. FIG. 3 is a cross-sectional view showing the coupling relationship between the stem and the opening / closing part according to the present invention. FIG. 4 is a cross-sectional view showing a strainer according to the present invention. FIG. 5 is a cross-sectional view showing the valve installation and operation structure of a strainer according to the present invention. FIG. 6 is a cross-sectional view showing the state in which the valve is fixed by lowering the stem in the downward direction in FIG. 5 according to the present invention. FIG. 7 is a cross-sectional view showing the spring installation structure of a strainer according to the present invention. FIG. 8 is a cross-sectional view showing the rocker operating structure of a strainer according to the present invention. Specific details for implementing the invention

[0022] The configuration and operation of an embodiment of the present invention are described in detail below in conjunction with the attached drawings. Furthermore, in describing the present invention, if it is determined that a detailed description of related known functions or configurations could unnecessarily obscure the essence of the present invention, such detailed description is omitted.

[0023] FIG. 1 is an exploded perspective view showing a strainer according to the present invention, FIG. 2 is a perspective view showing a valve according to the present invention, FIG. 3 is a cross-sectional view showing the coupling relationship between a stem and an opening / closing part according to the present invention, FIG. 4 is a cross-sectional view showing a strainer according to the present invention, FIG. 5 is a cross-sectional view showing the valve installation and operation structure of the strainer according to the present invention, FIG. 6 is a cross-sectional view showing the state in which the valve is fixed by lowering the stem downward in FIG. 5 according to the present invention, FIG. 7 is a cross-sectional view showing the spring installation structure of the strainer according to the present invention, FIG. 8 is a cross-sectional view showing the rocker operation structure of the strainer according to the present invention,

[0024] As shown in the drawing, the strainer of the present invention comprises: a connecting pipe (100) having an inlet (110) formed on one side and an outlet (120) formed on the other side and connected in a straight line to a pipe; a branch pipe (200) formed at a certain angle from the connecting pipe (100) while communicating with the interior of the connecting pipe (100); a filter mesh (300) installed inside the branch pipe (200) to filter impurities contained in the fluid passing through the connecting pipe (100) and configured to be easily separated from the branch pipe; and a valve (400) rotatably installed on the connecting pipe (100) to control the flow of fluid into the branch pipe (200) by opening and closing the inlet of the branch pipe (200).

[0025] The above connecting pipe (100) has an inlet (110) connected to the front pipe and an outlet (120) connected to the rear pipe, thereby connecting the pipes.

[0026] The above branch pipe (200) comprises: a branch body (210) in which one end is formed at a certain angle from the connecting pipe (100) and communicates with the interior of the connecting pipe (100), and the other end is configured to be sealed, and the filter mesh (300) is installed inside; an opening hole (211) that allows the interior of the branch body (210) to be opened by cutting a part of the branch body (210) so that the filter mesh (300) can be replaced; and a cover (220) installed to cover the opening hole (211) so that the interior of the branch body (210) can be opened and closed.

[0027] The above opening hole (211) is formed by cutting a part of the upper side of the branch body (210), and the filter mesh (300) is replaced through the opening hole (211).

[0028] Meanwhile, the above cover (220) is installed such that a locking projection (224) is formed on one end and the other end is connected to the branch pipe (200) through a fastening member (222) such as a piece while the locking projection (224) is fitted into the inside of the opening hole (211).

[0029] In addition, a sealing material (221) is installed so as to be interposed at the contact portion between the cover (220) and the branch body (210) to ensure watertightness.

[0030] The sealing material (221) can be installed attached to the lower surface of the cover or the thickness portion of the branch pipe.

[0031] The branch pipe (200) configured in this manner forms an opening hole (211) in the branch body (210) and installs an openable cover (220) in the opening hole (211), so that when replacing the filter mesh (300) installed inside the branch pipe (200), the cover (220) can be separated from the branch body (210) and the filter mesh (300) can be replaced.

[0032] In particular, the cover (220) is installed in the lateral direction of the branch pipe (220), so even if the strainer is installed in a narrow space, the cover (220) installed in the opening hole (211) on the side of the branch body (210) can be removed to clean or replace the filter mesh (300), thus providing excellent usability.

[0033] In addition, since one end of the cover (220) is fitted into the opening hole (211) of the branch pipe through the locking projection (224) and the other end is fastened through the fastening member (222), the number of installation points for the fastening member (222), such as a piece, is reduced, and a watertight connection is possible, making installation and disassembly very easy.

[0034] Meanwhile, a transparent window (223) is formed in the cover (220) so that the clogging status of the filter mesh (300) installed inside the branch pipe (200) can be easily checked, and the clogging status of the filter mesh (300) can be checked and cleaned without separating the cover (220).

[0035] The above filter screen (300) can be formed in a cylindrical shape and is installed inside the branch pipe (200) to filter impurities contained in the fluid passing through the connecting pipe (100).

[0036] At this time, it goes without saying that the length or diameter of the filter mesh (300) and the shape or size of the mesh holes are not limited.

[0037] The above valve (400) comprises: a sleeve (410) installed perpendicularly to the connecting pipe (100) and having a through hole (411) formed on its side; a stem (420) inserted into the inside of the sleeve (410) to open and close the valve through axial rotation and fixed in the opened / closed position; a locker (450) installed perpendicularly to the stem (420) and configured to continuously press against the inner wall of the sleeve (410) by means of an elastic spring (451) so that the stem (420) is fitted into a groove formed in the sleeve in the open or closed position, thereby restraining the stem (420) from rotating; and an opening / closing part (440) installed to be fitted into the stem (420) through the through hole (411) of the sleeve (410) and rotates in conjunction with the rotation of the stem (420) to open and close the inlet of the branch pipe (200).

[0038] The sleeve (410) is inserted into the interior of the connecting pipe (100) and has its upper and lower ends coupled to the inner diameter of the connecting pipe (100). It comprises a sleeve body (411) having a hollow formed in the center so that the stem (420) can be fitted; a rotation guide groove (412) formed concavely along the rotation radius of the sleeve body (411) inside the sleeve body (411) so that the rocker (450) is fitted and guides the rocker (450) when the stem (420) rotates; a pair of vertical guide grooves (413) formed concavely at both ends of the rotation guide groove (412) to have a depth greater than that of the rotation guide groove (412) and extending downward in the direction of the sleeve body (411); and a through hole (414) formed in the lower part of the sleeve body (411) to communicate with the hollow.

[0039] The above-mentioned rotation guide groove (412) guides the rocker (450) to rotate easily along the direction in which the stem (420) rotates when the stem (420) rotates, and the above-mentioned vertical guide groove (413) prevents the rocker (450) from rotating by pressing the stem (420) downward when the rocker (450) is inserted into the vertical guide groove (413) so that it is fitted downward into the vertical guide groove (413), thereby completely restricting the rotation of the stem (420) so that the branch pipe (200) can be maintained in an open or closed state through the opening / closing part (440).

[0040] The above through hole (414) is hollow and formed in a slot shape along the radius of rotation of the sleeve body (411), so that when the stem (420) rotates, the opening / closing part (440) connected to the stem (420) can rotate along the longitudinal direction of the through hole (414).

[0041] The above stem (420) has a lever (421) formed on its upper part, allowing the user to easily rotate the stem (420) by holding the lever (421).

[0042] Additionally, a pair of locking projections (423) are further formed on the lower part of the stem (420) so as to be spaced apart along the circumferential direction of the stem (420).

[0043] The above-mentioned locking projection (423) is formed so that the opening / closing part (440) can be caught on the stem (420), and is formed so that the opening / closing part (440) can rotate in conjunction with the stem (420) when the stem (420) rotates.

[0044] The above-mentioned rocker (450) is installed to be inserted into a rocker installation groove (422) formed concavely in the stem (420), and is configured to be continuously pressed toward the inner diameter direction of the sleeve (410) by an elastic spring (451) installed inside the rocker installation groove (422).

[0045] The above opening / closing part (440) is configured to include a stem coupling part (441) that is fitted to the outside of the stem (420) and is installed to be fitted between the pair of locking protrusions (423) through a fitting protrusion (442) formed on the inside so as to be able to rotate in conjunction with the rotation direction of the stem (420), a connecting shaft (443) that is inserted through the through hole (414) of the sleeve (410) and connected to the stem coupling part (441), and a disk (444) installed at the other end of the connecting shaft (443) to open / close the inlet of the branch pipe (200).

[0046] The above stem coupling part (441) is fitted to the outside of the stem (420), and is fitted to the stem (420) such that the fitting projection (442) is positioned between the locking projection (423), thereby connecting the opening / closing part (440) so that when the stem (420) rotates, the opening / closing part (440) can rotate along the direction of rotation of the stem (420).

[0047] The above connecting shaft (443) connects the stem coupling part (441) and the disk (444) and is guided into the slot-shaped through hole (414) formed in the sleeve (410), thereby allowing the opening / closing part (440) to rotate.

[0048] When cleaning or replacing the filter mesh (300), the opening / closing part (440) is linked to the rotation of the stem (420) so that the disc (442) seals the inlet portion of the branch pipe (200), thereby blocking the flow of fluid, and the cover (220) of the branch pipe (200) can be opened to replace the filter mesh (300) while the flow of fluid is blocked.

[0049] In addition, when fluid is to flow into a branch pipe, the inlet of the branch pipe is opened so that the fluid can flow smoothly.

[0050] Meanwhile, a lever (421) is formed at the top of the above stem (420) to easily rotate the stem (420), and by rotating the stem (420) through the lever (421), the branch pipe (200) can be opened and closed through the opening / closing part (440) connected to the stem (420).

[0051] A stem installation hole (130) is formed in the above connecting pipe (100) to allow the installation of a stem (420), and a packing (131) is installed between the stem installation hole (130) and the stem (420) to ensure watertightness.

[0052] In addition, a stem insertion groove (140) is formed in the vertical lower portion of the stem installation hole (130) so that the lower end of the stem (420) can be inserted.

[0053] The above spring (430) can be configured as a coil spring and is wound around the outer surface of the stem (420), with one end connected to the stem (420) and the other end connected to the inner wall of the sleeve (410), thereby causing the stem (420) to have a continuous tendency to rotate in one direction, and thus providing rotational force that allows the stem (420) to rotate more easily during the process of rotating the stem (420) to open the valve (400).

[0054] In addition, an installation groove is formed in the lower part of the stem (420) so that the spring (430) can be easily installed even when the gap between the stem (420) and the sleeve (410) is narrow.

[0055] In the strainer of the present invention configured in this manner, fluid is introduced through the inlet (110) of the connecting pipe (100), filtered through the filter mesh (300) of the branch pipe (200), and exits through the outlet (120).

[0056] At this time, the valve (400) is positioned with the branch pipe (200) open and is positioned to have a continuous rotational tendency toward the opening direction by the spring (430), thereby maintaining an open state without flowing into the fluid.

[0057] To explain in more detail, the stem (420) of the valve (400) is inserted into the lower direction of the sleeve (410) while rotated toward the opening direction, and the rocker (450) is maintained in the state of being inserted into the lower direction of the vertical guide groove (413).

[0058] Because the locker (450) is completely fitted into the vertical guide groove (413) in this way, the locker (450) is constrained in the rotational direction of the stem (420), so that the stem (420) does not rotate and the opening / closing part (440) remains in an open state.

[0059] Meanwhile, to clean or replace the filter screen, the stem (420) is lifted upward on the sleeve (410), and the rocker (450) is positioned at the top of the vertical guide groove (413). When the stem is rotated in the closing direction, the rocker (450) exits the vertical guide groove (413) and enters the rotation guide groove (412).

[0060] Afterwards, when the stem (420) is fully turned in the closing direction, the rocker (450) is continuously pushed toward the sleeve (410) by the elastic string (451), so it is inserted into the vertical guide groove (413) located in the closing direction, and when the stem (420) is pressed downward, it is inserted into the lower part of the vertical guide groove (413), so that the stem (420) is restrained without rotating.

[0061] In addition, when the above stem (420) is pulled or pressed in the upper or lower direction of the sleeve (410), the opening / closing part (440) is installed so that the fitting projection (442) is fitted between the locking projection (423) of the stem (420), thereby preventing it from moving in the height direction of the stem (420).

[0062] Meanwhile, when the stem rotates as described above, the opening / closing part (440) is linked and rotates in the same direction as the stem, thereby closing or opening the branch pipe (200).

[0063] As described above, when the opening / closing part (440) rotates by the rotation of the stem (420) and the disk (444) of the opening / closing part (440) closes the inlet of the branch pipe (200) to block the flow of fluid, the fastening member (220) of the cover (220) is released, the cover (220) is separated from the branch body (210), and the filter screen (300) installed inside the branch body (210) can be separated from the branch body (210) to clean or replace it.

[0064] Meanwhile, when the cleaning or replacement of the filter screen (500) is completed, the cover (220) is placed over the branch body (210), and the stem (420) of the valve (400) is pulled upward and then rotated in the opening direction. The opening / closing part (440) rotates in conjunction with the stem (420) to open the branch pipe (200).

[0065] At this time, the rocker (450) comes out of the vertical guide groove (413), is guided through the rotational guide groove (412), and is inserted into an adjacent vertical guide groove (413), thereby keeping the valve (400) in a closed state.

[0066] The strainer of the present invention configured in this manner is configured to open the side of the branch pipe (200), so that even when the installation space of the strainer is narrow, the filter mesh (300) inside the strainer can be easily cleaned or replaced, thus providing excellent usability.

[0067] In addition, the filter screen (300) can be easily cleaned or replaced while the fluid flow to the branch pipe (200) is blocked through the valve (400), and the locker (450) of the valve (400) is inserted into a pair of vertical guide grooves (413) formed in the sleeve (410) so that the valve (400) can be stably maintained in an open or closed state.

[0068] The present invention is not limited to the specific preferred embodiments described above, and anyone with ordinary knowledge in the art to which the invention pertains can make various modifications without departing from the essence of the invention as claimed in the claims, and such modifications will be within the scope of the claims. Explanation of the symbols

[0069] (100) : Connector (110) : Inlet (120) : Outlet (130) : Stem installation hole (140) : Stem insertion groove (200) : Branch pipe (210) : Branch body (211) : Opening hole (212) : Step (220) : Cover (221) : Sealing material (222) : Fastening member (223) : Transparent window (224) : Stopper (300) : Filter screen (400) : Valve (410) : Sleeve (411) : Sleeve body (412) : Rotation guide groove (413) : Vertical guide groove (414) : Through hole (420) : Stem (421) : Lever (422) : Rocker installation groove (423) : Locking projection (424) : Installation groove (430) : Spring (440) : Opening / closing part (441) : Stem connecting part (442) : Insertion projection (443) : Connecting axis (444) : Disk (450) : Rocker (451) : Elastic spring (500) : Filter net

Claims

Claim 1 A connecting pipe formed with an inlet on one side and an outlet on the other side, connected in a straight line to the piping; a branch pipe comprising a branch body formed at a certain angle inclined from the connecting pipe while communicating with the connecting pipe, an opening hole formed to open the interior of the branch body, and a cover installed to cover the opening hole to enable opening and closing of the interior of the branch body; a filter mesh installed inside the branch pipe to filter impurities contained in the fluid passing through the connecting pipe and configured to be easily separated from the branch pipe through the opening hole; and a valve rotatably installed on the connecting pipe to control the fluid flow into the branch pipe by opening and closing the inlet of the branch pipe; wherein the valve comprises a sleeve body having a hollow formed in the center, a rotation guide groove formed concavely along the rotation radius of the sleeve body inside the sleeve body, a pair of vertical guide grooves formed concavely at both ends of the rotation guide groove to have a depth greater than the depth of the rotation guide groove and extending downward in the direction of the sleeve body, and a hollow at the bottom of the sleeve body A side-opening strainer characterized by comprising: a sleeve formed with a slot-shaped through hole formed along the radius of rotation of a sleeve body to allow communication; a stem inserted into the interior of the sleeve to open and close a valve through axial rotation and fixed in the opened / closed position; a rocker installed perpendicular to the stem and configured to be continuously pressed toward the inner wall of the sleeve by an elastic spring while fitted into the rotation guide groove, and inserted into the vertical guide groove when the stem rotates at a certain angle, and then inserted toward the lower direction of the vertical guide groove when the stem is pressed downward to restrain the stem in a rotated state; and an opening / closing part installed to be fitted onto the stem through the through hole of the sleeve and rotating in conjunction with the rotation of the stem to open and close the inlet of a branch pipe. Claim 2 delete Claim 3 A side-opening strainer according to claim 1, wherein a pair of locking protrusions are further formed on the lower part of the stem so as to be spaced apart along the circumferential direction of the stem, and the opening / closing part is configured to be fitted to the outside of the stem, but is installed to be fitted between the pair of locking protrusions through a fitting protrusion formed on the inside so as to be able to rotate in conjunction with the rotation direction of the stem, a connecting shaft inserted through a through hole of the sleeve and connected to the stem connecting part, and a disc installed at the other end of the connecting shaft to open and close the inlet of the branch pipe. Claim 4 A side-opening strainer according to claim 1, further comprising a spring installed to surround the outer surface of a stem inside the sleeve, wherein one end is connected to the inner wall of the sleeve and the other end is connected to the stem, so that the stem has a tendency to rotate toward the opening direction of the branch pipe, thereby facilitating the opening of the valve. Claim 5 A side-open strainer according to claim 4, characterized in that a concave installation groove is formed in the inward direction of the stem along the radius of rotation of the stem to secure an installation space for the spring, and the spring is installed at the location of the installation groove. Claim 6 A side-opening strainer according to claim 1, characterized in that one end of the cover is fitted into the inside of the opening hole through a locking projection formed on one end, and the other end is connected to a branch pipe through a fastening member, and a sealing material is interposed between the contact portion of the cover and the branch pipe. Claim 7 A side-opening strainer according to claim 1, characterized in that a transparent window is formed in the cover to check the clogging status of the filter mesh installed inside the branch pipe.

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