JPH0512559Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a strainer latching device for conduit pipes, and is suitable for replacing a cylindrical screen in a conventional strainer insertion device before applying a presser cap. This simplifies the need for special operations to replace the device, as it may fall out of the insertion slot.

(Prior art) A pipe a shown in Figs. 4 and 5 is used to filter fluid flowing through the pipe, and the pipe has flanged inlets b and outlet c at both ends. In between, a bent tube d pointing diagonally downward at approximately 45 degrees is integrally molded into a tri-pronged shape, an insertion port e is provided at the bottom of the bent tube, and a tube at the same angle as the bent tube d is provided on the tube wall inside the insertion port e. The annular engaging step surface f is provided to approximately match the outer diameter of the screen h, the inner diameter of the insertion port e is also approximately matched to the outer diameter of the screen h, and the presser cover g is attached to the flange around the insertion port using screws, etc. It has a structure that allows it to be installed. Furthermore, although the screen h is replaced in the absence of fluid, it must be replaced frequently because filtration slag adheres to the inner surface of the screen. However, since the bent pipe d is tilted downward as described above and the screen cannot be engaged and held in the engagement step surface f and the insertion port e, the screen h will slip and fall under its own weight, as shown in FIG. Place the screen h on the inner surface of the presser cover g and insert it from the insertion slot e,
The screen is assembled by fitting the outer periphery of the upper end of the screen into the engaging stepped surface f and fixing the presser cover g to the flange on the outer periphery of the insertion opening e with screws or the like.
Not only does it take time to install it, but it also makes it impossible to confirm that it is installed in the correct position as shown in Figure 4, so there are disadvantages such as tightening the presser cover g while crushing the screen h and not noticing it. There is a risk that it may become incomplete.

(Problems to be Solved by the Present Invention) In view of the above, the present invention has devised a method in which the screen is separated from the presser cover and inserted into the fixed position independently, and after confirming this, the presser cover can be attached. This is an issue to be addressed.

(Means for solving the problem) The present invention aims to specifically solve the above-mentioned problem. The device is characterized in that a locking step portion is provided on which the rear end of the insertion device is hung, and the inner surface of the presser lid is joined to the screen hooked on the locking step portion.

A preferred embodiment of the invention will be described in the following section.

(Embodiment) As before, FIG. 1 shows a conduit pipe 1 consisting of a flanged inlet 2, an outlet 3, and a bent pipe 4 having an insertion port 5, an engaging stepped surface 6, and a holding lid 7. We will prepare as usual.

A locking stepped portion 8 whose outer diameter is slightly larger than that of the screen 9 is provided inside the insertion port 5.

(Function) In the present invention, the screen 9 is inserted obliquely from the insertion opening 5, the front end outer periphery 9a is fitted into the engagement stepped surface 6, and the lower end of the rear end outer periphery 9b is fitted into the locking step 8.
Even if the rear end outer periphery 9b does not fit into the locking step 8 by hand, there is a tactile sensation that the front end outer periphery 9a is fitted, and if the rear end outer periphery 9b passes inside the insertion opening 5, the rear end of the screen 9 will be removed. Since the lower end of the rear end outer periphery 9b falls under its own weight into the locking step 8 as shown in FIG. It is better to check.

In this way, the screen 9 is inserted into the conduit pipe 1 from the insertion opening 5 alone, and the locking step 8 locks it in the mounting position as shown in FIG. Place it in place and fix it with screws, etc. as usual.

(Effects) As is clear from the above, the present invention provides an annular locking step 8 with a slightly enlarged diameter inside the insertion port 5 provided in the conduit pipe 1, and handles the insertion of the screen 9 independently. Fitting the front end outer periphery 9a into the engagement stepped surface 6,
After confirming that the rear end outer periphery 9b has passed through the insertion opening 5 and that it has been inserted into the proper mounting position by fitting into the locking step 8, and preventing the screen 9 from falling due to its own weight, Since the presser cover 7 can be fixed by placing it against the insertion opening 5, there is no need to perform the blind work of placing a cylindrical screen on the presser cover and inserting it into the insertion opening as in the conventional method. Since the correct installed position can be maintained by applying the screen 9 to the rear end of the screen 9, it has unique effects such as preventing the strainer from being damaged due to the screen 9 being crushed or not being properly fitted into the correct position. .

[Brief explanation of the drawing]

1 to 3 show the present invention, and FIG. 1 shows the conduit pipe 1.
2 and 3 are cross-sectional views of the central part of the presser cover 7.
The figure is a partially enlarged sectional view. 4 and 5 are vertical sectional views of the center of the conventional device. 1... Conduit pipe, 4... Bent pipe, 5... Insertion port,
6... Engagement stepped surface, 7... Presser cover, 8... Locking step, 9... Screen.

Claims (1)

[Claim for Utility Model Registration] In a strainer insertion device that replaceably inserts a cylindrical screen into a conduit pipe and attaches a presser cover to the insertion opening to hold the screen in the insertion position, the screen is provided inside the insertion opening. It has a structure in which a locking step part whose diameter is slightly larger than the outer diameter of the screen and on which the rear end of the screen is hung is provided, and the inner surface of the presser cover is joined to the screen which is hooked to the locking step part. Strainer latching device for conduit pipes.