JPS5938810B2 - Strainer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a strainer, and more particularly to a strainer that is placed in the middle of a piping system to remove foreign matter contained in a fluid passing through the system.

Conventionally, this type of strainer has been provided as shown in FIGS. 1 and 2, in which foreign matter contained in the fluid moving in the direction of the arrow in the figure in the filter cylinder 5 housed inside has been provided. The filter tube 5 is firmly attached to the strainer housing 3 and held in a predetermined position by the strainer cap 6. However, since the cap 6 is not of a type that can be removed frequently, in order to drain the fluid from the system after the strainer out of the system, it is necessary to add a separate drainage device to the system after the strainer. As shown in Figure 3, when a strainer A is installed in the piping system that supplies water to the solar water heater, in order to prevent the water remaining in the area from the strainer A to the distern C from freezing, the water must be placed in the distern C. Water supply pipe P that supplies
In addition to the strainer A, it is necessary to add a drainage device B for draining water between the stop valve V and the distern C, which is installed in There is the problem of high construction costs, and even if a drainage system is not added, it is necessary to insulate all pipes from stop valve V to distern C to prevent freezing. There is a problem that plumbing work takes time.

The present invention has been made in view of the above points, and its main purpose is to easily discharge the fluid in the piping line after the strainer directly from the strainer, thereby preventing freezing in the piping line after the strainer. Another objective is to provide a strainer that can reliably prevent the flow of foreign matter from the drain port provided in the strainer (as the fluid passes through the filter tube inside the strainer, the drain port is blocked by foreign matter contained in the fluid). To provide a strainer that does not cause clogging.

The present invention will be described in detail below based on embodiments shown in the figures.

As shown in FIG. 4 and below, the strainer according to the present invention has the following features:
A strainer housing 3 having an inlet 1 at the lower end and an outlet 2 at the upper end, and a lateral end formed in the strainer nano-Ujifugu 3 between the inlet 1 and the outlet 2 opening to the outside. A filter chamber 4 having an advection port 35 communicating with the inlet 1 side and an outlet port 36 communicating with the outlet 2 side; The filter cylinder 5 has a rear end fitted into the advection port 35 to remove foreign matter contained in the fluid flowing from the inlet 1 to the outflow port 2 and store the foreign matter inside, and the filter chamber 4 is opened. A cap 6 that closes off and holds the filter tube 5 in a predetermined position in the filter chamber 4, and a cap 6 that communicates with the filter chamber 4 and the outside and that is oriented horizontally to discharge the fluid supplied to the outlet 2 to the outside. It is characterized by comprising a drainage lower provided below the filter tube 51 and a drainage plug 8 for opening and closing the drainage lower,
In this embodiment, both ends of the filter tube 5 are open, and the filter tube 5 closes one opening with the inner wall of the cap 6 and communicates the other opening with the inlet, so that its opening axis is perpendicular to the four axes of the inlet 1. The drain lower is provided in a portion located outside the peripheral wall of the filter tube 5 and on the side of the inlet 1, so that the fluid that has passed through the filter tube 5 is discharged from the drain lower 1 to the outside. An example of discharge is shown.

The strainer A of the present invention is installed in a pipe running vertically with the inlet 1 at the bottom and the outlet 2 at the top,
The inflow port 1 and the outflow port 2 are lined up and down in a straight line, and inside the strainer nano-Ujifugu 3, as shown in FIG.
It is divided into left and right sections by a partition 11Vc having a diameter of 0, and an inlet 1 and an outlet 2 each having a female thread at one end of each section.
is located.

As shown in the figure, the partition 11 around the through-hole 10 is formed approximately parallel to the four axes of the strainer A, and the opening 12 is formed in a part of the side wall of the strainer housing 3 on the side of the outlet 2 from the partition 11. A filter chamber 4 is formed between the cap 6 and the cap 6, and a filter cylinder 5 is housed in the filter chamber.

The filter tube 5 is formed of a wire mesh into a cylindrical shape with both ends open, and both edges are locked in a partition 11 around the through hole 10 and circumferential ribs 13 and 14 protruding from the inner circumference of the cap 6, respectively. The filter tube 5 is housed in the filter chamber 4 in a horizontal position with its axis substantially horizontal, and the rear end opening of the filter tube 5 is fitted into the advection port 35 of the filter chamber 4 to be held in the filter chamber 4. As shown by the arrow in the figure, the fluid sent to the inlet 11 advances into the filter tube 5 from the through hole 10, passes through the filter tube 5, and is sent to the outlet 2 through the outlet 36 of the filter chamber 4. During this time, foreign matter contained in the fluid is captured in the filter tube 5, and foreign matter larger than the mesh of the filter tube 5 is prevented from reaching the outlet 2.

As shown in the figure, the cap 6 has a male thread 1 provided on the outer periphery.
5 is screwed into the opening 12 of the strainer housing 3, and the opening 12 is sealed watertightly with an O-ring 18 between the cap 6 and the opening 12. When cleaning the filter cylinder 5, the cap 6 After grasping the handle 16 protruding from the outside and removing the cap 6, the filter cylinder 5 is taken out and foreign matter accumulated inside is removed.

On the other hand, the drain lower is closed by a drain plug 8 inserted into a drain pipe 20X that protrudes from the outer wall of the strainer housing 3 corresponding to the lower part of the filter chamber 4, that is, just above the oblique side of the partition 11.

The drain plug 8 is attached to the drain tube 20 by screwing a male screw 21 on the outer periphery of the tip to the inner wall of the drain tube 20 so that it can move forward and backward along the axial direction of the drain tube 20, and as shown in FIG. When tightened all at once, the protrusion 22 at the tip blocks the drain lower, and when loosened, the through hole 2 provided in the peripheral wall of the drain pipe 20 closes.
4 is connected to a drainage lower, and the fluid in the system after the strainer A is extracted to the outside from this drainage lower.

In addition, at this time, since the fluid discharged to the outside always passes through the filter tube 5, foreign matter contained in the fluid is captured by the filter tube 5, and the drain lower is not clogged with foreign matter. Since it is provided at the bottom of the filter chamber 4, most of the fluid in the filter chamber 4, that is, the fluid in the strainer A, will be extracted, and even if the fluid freezes, the strainer A itself will not be damaged. It's something that doesn't exist.

In the embodiment shown in FIGS. 8 and 9, a stop valve 30 is provided on the flow path from the inlet 1 to the filter tube 5, and the stop valve 30 is incorporated into the strainer A. , the strainer A and the stop valve 30 can be installed in one piping system in one operation.

The stop valve 30, as shown in FIG. Valve body 3 provided at both front and rear ends
The through hole 10 as the advection port 35 of the partition 11 is opened and closed by the valve body 33 at the front end of the valve shaft 32, which moves back and forth with the rotation of the /% wheel 340. In this case as well, the drainage lower is provided at the bottom of the filter chamber 4 shown in the same figure, as in the previous embodiment, and when the drainage lower is opened, the fluid from the valve body 33 onwards is extracted from the piping system. There is no need to provide a heat insulating material for freezing prevention after the stop valve 30.

As described above, the present invention provides a drain port for discharging the fluid supplied to the outlet to the outside in a part of the strainer housing in the middle of the flow path from the inlet to the outlet via the filter cylinder. The drain port can be opened and closed with a drain plug, so if there is a risk of freezing of the fluid remaining in the flow path after the strainer in a piping system with a built-in strainer, simply open this drain plug. It is possible to extract the fluid after the strainer, and there is no need to add a separate drainage device to the piping system other than the strainer, and it can be used for piping work of water supply channels to solar water heaters that require a drain along with the strainer. can be easily done.

Moreover, in order to discharge the fluid supplied to the outlet to the outside, the filter chamber is connected to the outside and the drain is provided below the horizontal filter cylinder, so the drain is connected to the inlet from the inlet. Only fluid from which foreign matter has been filtered through the filter cylinder is constantly supplied and passed through, preventing foreign matter from accumulating around the drain port (when the drain plug is removed, Since there is no clogging and there is no need to clean the drain port, there is no need to configure the member with the drain port so that it can be attached to and removed from the strainer housing. This has the advantage that the drain port can be provided directly in the strainer housing, maintenance is not required by setting the drain port in a rational position, and the configuration can be simplified.

Furthermore, since the drainage port is provided below the horizontally oriented filter tube, foreign matter can be captured by the filter tube even when water is drained from the piping system after the filter tube.
In this respect as well, there is an advantage that clogging of the drain port can be suppressed.

[Brief explanation of drawings]

Figures 1 and 2 are sectional views showing a conventional strainer, Figure 3 is a schematic view showing the same strainer installed in a water supply channel to a solar water heater, and Figure 4 is an embodiment of the present invention. 5 is a bottom view of the same, FIG. 6 is a top view of the same, FIG. 7 is a partial side view of the same, and FIG. 8 is a partially cutaway view showing another embodiment of the present invention. A schematic top view, and FIG. 9 is a vertical cross-sectional view of the same, in which 1 is an inlet, 2 is an outlet, 3 is a strainer housing, 4 is a filter chamber, 5 is a filter tube, 6 is a cap, 7 is a drain port, 8 is a drain plug, 35 is an advection port, and 36 is an outlet.

Claims (1)

[Claims] 1. A strainer housing having an inlet at the lower end and an outlet at the upper end, and a lateral end formed in the strainer housing between the inlet and the outlet opening to the outside and allowing the flow to flow through the strainer housing. A filter chamber having an advection port that communicates with the inlet side and an outlet port that communicates with the outflow port side, and a cylindrical filter chamber that is housed in the filter chamber in a horizontal position with its axis substantially horizontal, and a cylindrical tube that is placed in the advection port. A filter tube whose rear end is fitted to remove foreign matter contained in the fluid flowing from the inlet to the outlet and store the foreign matter inside, and a filter tube that closes the opening of the filter chamber and holds the filter tube at a predetermined position in the filter chamber. A cap that holds the outlet, a drain port that communicates with the filter chamber and the outside and is provided below the horizontally oriented filter tube in order to discharge the fluid supplied to the outside, and a drain that opens and closes the drain port. A strainer characterized by comprising a stopper. 2. Attach a valve cap to the opening provided in the side wall of the strainer housing, provide a valve shaft that penetrates the valve cap and is movable back and forth in the penetrating direction, and open and close the advection port of the filter chamber at the front end of the valve shaft on the inflow port side. 2. The strainer according to claim 1, further comprising a valve body and a bundle wheel provided at the rear end of the valve shaft.