JPH0321203B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a fluid flow path that is installed at an appropriate location in a fluid flow path such as a water pipe or gas pipe that is appropriately installed in a building facility such as a general house, a restaurant, or a hospital. Regarding a filter for filtering and removing foreign substances in a flow path, in detail, the inlet of a secondary fluid passage connected to a fluid outlet is opened in a primary fluid passage connected to a fluid inlet, and the inlet is blocked. A valve seat for the valve is attached, a cylindrical strainer is installed between the valve seat and the wall of the primary fluid passage facing thereto, and the strainer is further seated on the valve seat within the strainer. The present invention relates to a filter with a cutoff valve in which a valve body for a cutoff valve is arranged.

[Conventional technology]

Conventionally, in such a filter with a shutoff valve, the lower end of the strainer was attached to the bottom wall of the valve box (for example, Japanese Utility Model Application No. 180894/1989).

[Problem to be solved by the invention]

However, in the conventional filter with a shutoff valve, the lower end of the strainer is attached to the bottom wall of the valve box, so the filtrate accumulates on the bottom wall of the valve box and flows upward from near the bottom of the strainer. There is a drawback that the filtering surface area of the strainer is reduced by the accumulation, which obstructs the flow in the passage, and also tends to reduce the filtering performance.

SUMMARY OF THE INVENTION An object of the present invention is to provide a filter with a shutoff valve that can eliminate the above-mentioned conventional drawbacks and maintain high filtration performance over a long period of time.

[Means to solve the problem]

The filter with a shutoff valve according to the present invention is characterized in that a filtrate retention space is arranged below the strainer in the primary fluid passage, and its functions and effects are as follows.

[Effect]

In other words, since the filtrate retention space is arranged below the strainer in the primary fluid passage, the filtrate filtered by the strainer falls downward under its own weight and accumulates in this retention space. This makes it difficult for the liquid to accumulate upward from near the bottom of the strainer. As a result, the filtering surface area of the strainer can be prevented from decreasing, and the flow within the passage is less likely to be obstructed.

〔Effect of the invention〕

Therefore, it was possible to provide a filter with a shutoff valve that can prevent a decrease in filtration performance due to clogging and the like and maintain high filtration performance over a long period of time.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

In FIG. 1, reference numeral 1 denotes an outer cylindrical body in which a fluid inlet member 2 is attached to a through hole 1a on the side, a fluid inlet A is opened laterally, and a primary fluid passage B is formed inside. A through hole 1b is bored in the side wall of the outer cylindrical body 1, through which the inner cylindrical body 3 having a fluid outlet C and bent in a hook shape can be inserted. An actuator 4 is mounted on the cap.

The inner cylinder body 3 is inserted and fixed into the through hole 1b of the side wall of the outer cylinder body 1 with its fluid outlet C side located outside and the outlet C opened laterally, and the first Next fluid outlet C into fluid passage B
The inlet E of the secondary fluid passage D on the side is opened upward.

A valve seat 5 for a shutoff valve is externally fitted to the inlet E, and the wall of the primary fluid passage B, that is, the outer cylindrical body 1 facing the valve seat 5
A cylindrical strainer 6, more specifically, a strainer 6 in which a metal net-like body 6b is fitted onto a metal cylindrical body 6a having a large number of small holes, is installed. Furthermore, inside the strainer 6,
The valve body 7 for the shutoff valve is driven up and down by the actuator 4, more specifically, when it is raised by the actuator 4, it leaves the valve seat 5, while the force for raising it by the actuator 4 is released. A valve element 7 for a shutoff valve is disposed, which seats on the valve seat 5 when lowered by the biasing force of a spring 8.

A filtrate retention space S is formed below the strainer 6 within the primary fluid passage B.

Such a filter with a shutoff valve has a cylindrical strainer 6 installed therein to constitute the filter, and a valve seat 5 installed at the inlet E of the secondary fluid passage D and an actuator disposed inside the strainer 6. A shutoff valve consisting of a valve body 7 which is vertically driven by a valve 4 is installed inside the valve body.

[Another example]

The strainer 6 may be made of various materials other than metal, such as synthetic resin. Moreover, various modifications of the shape are possible, such as a cylindrical shape and a polygonal shape. Furthermore, various modifications of the shape are possible, such as a mesh shape, in addition to the cylindrical body with a large number of small holes.

Furthermore, it goes without saying that the positions of the fluid inlet A and the fluid outlet C are not limited to the positions shown in the above-described embodiments.

Furthermore, as shown in FIG. 2, a fluid inlet member 2 is attached to the through hole 1a at the bottom of the outer cylinder 1, so that the fluid inlet A is opened downward and a primary fluid passage B is formed inside. It may be something that has been done.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of a filter with a shutoff valve according to the present invention, with FIG. 1 being a longitudinal sectional view and FIG. 2 being a longitudinal sectional view of another embodiment. A...Fluid inlet, B...Primary fluid passage, C...
...Fluid outlet, D...Secondary fluid passage, E...Entrance of secondary fluid passage, S...Filtrate retention space, 1...
...Wall body of the primary fluid passage, 5... Valve seat, 6... Strainer, 7... Valve body.

Claims (1)

[Claims] 1 Opening an inlet E of a secondary fluid passage D leading to a fluid outlet C in a primary fluid passage B leading to a fluid inlet A, and installing a valve seat 5 for a shutoff valve in the inlet E. , a cylindrical strainer 6 is installed across the valve seat 5 and the wall 1 of the primary fluid passage B facing thereto, and furthermore, the strainer 6
This is a filter with a cutoff valve, in which a valve body 7 for a cutoff valve that can be seated on the valve seat 5 is arranged, and a filtrate retention space is provided below the strainer 6 in the primary fluid passage B. A filter with a shutoff valve equipped with S.