JPH059052Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a water heater strainer that is installed in the water supply pipe to the water heater to remove foreign matter, dust, scale, etc. mixed in the supplied water. .

[Conventional technology]

As shown in Fig. 6, the conventional strainer for this type of water heater has a housing A' with an inlet side 1a' and an outlet side 1b' displaced left and right, and is connected to a crank-shaped strainer via an intermediate horizontal passage. A water supply channel 1' is formed in the water supply channel 1', and a strainer insertion hole 2' is provided in the intermediate horizontal part of the water supply channel 1'.
A plurality of cylindrical strainers B' inserted into the strainer insertion hole 2' are arranged around the entire circumference of the cylindrical end portion 4' communicating with the opening 12' located on the inlet side 1a' of the water supply channel 1'. A window hole 3' is bored at the outlet side 1b' of the water supply channel 1', and a filter 5' is stretched around the entire inner circumference of the window hole 3'.

In addition, as a filter, the inlet and outlet channels are located in the same straight line in the outer casing, with a passage that matches the inlet channel on one side and an appropriately sized outlet on the other side. There is one that houses a filter tube with a filter net attached (see Utility Model Application Publication No. 14595 of 1930).

[The problem that the idea attempts to solve]

In the above-mentioned conventional strainer, the water supply channel 1' is crank-shaped, and a cylindrical strainer is installed in the intermediate horizontal part.
B' is inserted, and the water is flowing from the inlet side 1a' of the water supply channel 1' →
Water flows along the path of opening 12' of cylindrical strainer B' → cylindrical tip 4' → filter 5' → window hole 3' → outlet side 1b' of water supply channel 1', so the flow resistance is Problems such as the increase in size, the complexity of the shape and structure, and the increase in the size of the equipment have arisen.

In addition, in the latter type of filter, the filter tube is fitted into the outer casing, the ring flange is held between the upper edge of the outer casing and the lid, and the lid is bolted to the outer casing. This was inconvenient because the bolts were not airtight and the bolts had to be removed using a tool for insertion and removal.

This idea was made in view of the problems of conventional strainers, and its purpose is to make the water supply channel straight and to make the straining part have an opening area larger than the water supply channel on the half circumference. A water flow hole is drilled and a filter is stretched over the water flow hole to reduce water flow resistance.The filter body can be easily inserted into and removed from the insertion opening of the casing, and can be attached and detached using a fixing pin. The aim is to provide a strainer for boilers.

[Means to solve the problem]

In order to achieve the above object, the water heater strainer according to this invention has a straight water supply channel and a strainer insertion hole perpendicular to the water supply channel in the housing, and the water supply channel is installed in the strainer insertion hole. A water passage hole with a larger opening area is drilled in the half circumference of the cylindrical tip, and a cylindrical strainer body with a filter stretched over the water passage hole is provided in a removable manner near the opening end of the insertion hole of the casing. The cylindrical strainer body is inserted into the casing by inserting and removing a locking pin into a locking hole drilled in the cylindrical strainer body and a locking recess drilled in the proximal end of the cylindrical strainer body at a position that matches the locking hole. It is designed so that it can be attached to and removed from the hole.

[Effect]

The water heater strainer according to this invention configured as described above has a straight line type water supply channel, and
The straining part of the cylindrical strainer inserted into the water supply channel has a water passage hole in the half circumference of the cylindrical part at the tip, the opening area of which is larger than that of the water supply passage, and a filter is stretched over the water passage hole. Therefore, the running water enters the cylindrical portion at the tip of the strainer from the inlet side of the water supply channel, passes through the filter and the water passage hole, and flows linearly to the outlet side of the water supply channel. and,
Since the filter and the water passage hole have a larger opening area than the water supply channel, the water flow area is the same as that of the conventional all-around type.

Insert the cylindrical strainer body into this casing, and insert the locking pin into the locking hole on the housing side and the locking recess on the cylindrical strainer side to fix the cylindrical strainer body to the casing. Once removed, the cylindrical strainer body can be easily removed from the housing.

〔Example〕

Examples of the water heater strainer according to this invention will be described below with reference to the drawings.

In Figures 1 to 5, A is a casing, which includes a straight water supply channel 1 with an inlet side 1a and an outlet side 1b arranged in straight line positions in the upper and lower directions in the figure, and a straight line in the middle of the water supply channel 1. The body insertion hole 2 is bored perpendicularly to the water supply channel 1, and a spiral portion 10 is provided for connecting the inlet side 9a of the water supply pipe 9 to the end of the inlet side 1a of the water supply channel 1.
At the same time, a different diameter cylindrical part 11 for connecting the outlet side 9b of the water supply pipe 9 is formed at the end of the outlet side 1b.
, and one end of the strip body insertion hole 2 is an opening 2a.
The other end is closed with a supporting stepped portion 2b.

Reference numeral B denotes a cylindrical strainer body, which can be inserted into the strainer insertion hole 2 of the housing A in an air-tight manner, and has a cylindrical part 4 at its tip with one half circumference (the upper half in the figure). A water passage hole 3 having an opening area larger than the opening area of the water supply channel 1 of the housing A (for example, an opening area that is about three times the opening area of the water supply channel 1, which is the same as that of a conventional one on the entire circumference). A filter 5 made of a mesh, a perforated plate, etc. made of metal, synthetic resin, etc. is stretched on the inner surface of the water passage hole 3, and the center part of the other half circumference (lower half in the figure), that is, the water passage hole Water supply channel 1 directly below 3
A through hole 12 having the same diameter as that of
The filters 5 and 3 communicate with each other via the water holes 3 to form a linear water flow path. The end portion of the tip cylindrical portion 4 can be fitted into the other end supporting step portion 2b of the strainer insertion hole 2 without any looseness, and an annular sealing material 13 is provided on the base end side of the strainer insertion hole. 2, and locking recesses 7 are provided on both sides of the proximal end (top and bottom in the figure) into which locking pins 8, which will be described later, can be inserted.

6 is an opening 2 at one end of the rack body insertion hole 2 drilled in the housing A.
A locking hole is bored near point a at a position matching the locking recess 7 of the cylindrical strainer body B, through which a locking pin 8, which will be described later, can be inserted. Further, 8 is a hole for fixing the cylindrical sifting body B inserted into the casing A by inserting it into the locking hole 6 on the casing A side and the latching recess 7 on the cylindrical sifting body B side. The locking pin is bent into an inverted U-shape so that it can be easily inserted into and removed from the locking hole 6 and the locking recess 7 on both sides. It is not limited to.

In the usage example shown in FIG. 5, D is a strainer of this invention, which is installed in the middle of the water supply pipe 9 to the water heater E. 14 is a gas supply pipe to the water heater E, and a gas on-off valve 15 is provided in the middle of the pipe. 1
6 is a hot water faucet with a flexible hot water pipe 17 from the water heater E.
It is provided at the tip of the. 18 is a push-type operation button, 19 is a slide-type variable capacity switching lever, and 20 is a viewing window.

In the above configuration, when the cylindrical strainer B is inserted into the strainer insertion hole 2 of the housing A from its one end opening 2a to a predetermined position with the water passage hole 3 positioned above, the end of the cylindrical portion 4 The part is the other end support step part 2 of the strip body insertion hole 2
b, and the center of the water passage hole 3 with filter 5 of the cylindrical tip portion 4 matches the center of the outlet side 1b of the water supply channel 1, and the through hole 12 of the cylindrical tip portion 4 is connected to the water supply channel. At the same time, the annular sealing member 13 on the proximal side maintains the sealing performance between the shaving body insertion hole 2 and the cylindrical shaving body B, and the locking hole 6 provided in the housing A The locking recess 7 provided in the cylindrical strainer body B matches with the locking recess 7. Thereafter, the locking pin 8 is inserted into the locking hole 6 and the locking recess 7 to fix the cylindrical strainer body B to the housing A, thereby forming the strainer D. Thus, the inlet side 9a of the water supply pipe 9 divided into the spiral tube part 10 on the inlet side 1a of the water supply channel 1 is connected by the cap nut 21, and the different diameter cylindrical part 1 on the outlet side 1b is connected.
1, the outlet side 9b of the water supply pipe 9 is connected through a pipe joint 22, and a strainer D is attached and installed on the water supply pipe 9.

In the above configuration, water flows to the water heater E from the inlet side 9a of the water supply pipe 9→the inlet side 1a of the water supply channel 1 of the strainer D→through hole 12→inside the cylindrical tip 4→filter 5
→Water hole 3→Outlet side 1b of water supply channel 1→Outlet side 9b of water supply pipe 9. The water flows along a straight water flow path. In this flow path, when water flows from inside the cylindrical tip 4 to the outlet side 1b of the water supply channel 1 via the filter 5 and the water hole 3, a water hole is formed in the upper half of the cylindrical tip 4. 3 has a larger opening area than the water supply channel 1, as shown by the arrow a in Fig. 4, both sides of the flowing water go around the water passage hole 3 and direct it toward the outlet side 1b of the water supply channel 1. Even if the straining operation is carried out only on the half-circumference part, the same ability as the conventional full-circle type can be obtained.

Also, when replacing or cleaning the cylindrical strainer B,
By removing the retaining pin 8, the cylindrical strainer body B can be easily removed from the housing A.

[Effect of idea]

Since this invention has the above-mentioned configuration, it produces the effects described below.

This idea uses a straight-line water supply channel, and the straining part of the cylindrical strainer has a water hole with a larger opening area than the water supply channel in the half circumference of the cylindrical part at the tip, and a filter is placed in the water hole. Because of this structure, the water flow path is in a straight line, and since the strainer is provided only on the half circumference, the main flow of the flow flows straight and smoothly without bending, reducing water flow resistance. However, since the opening area of the strainer section is larger than the water supply channel, the water passing area is the same as that of the conventional all-around type, and there is no reduction in performance at all. The cylindrical strainer can be easily inserted and removed without using any special tools, and it is convenient for replacing and cleaning the cylindrical strainer.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of a water heater strainer according to this invention, Fig. 2 is a partially cutaway side view, Fig. 3 is a plan view of only the cylindrical strainer body, and Fig. 4 is a cross-sectional view showing an embodiment of a strainer for a water heater according to this invention. 3 is an enlarged sectional view taken along the - line in FIG. 3, FIG. 5 is a front view of a water heater equipped with the strainer of this invention, and FIG. 6 is a partially cutaway front view of a conventional example. A... Housing, 1... Water supply channel, 2... Strain body insertion hole, 3... Water passage hole, 4... Cylindrical tip, 5... Filter, B... Cylindrical strainer body, 6... ...Latching hole, 7...
Locking recess, 8... Locking pin.

Claims (1)

[Scope of utility model registration request] A linear water supply channel 1 and a strainer insertion hole 2 perpendicular to the water supply channel 1 are provided in the housing A, and a water flow hole 3 with an opening area larger than the water supply channel 1 is provided in the filter body insertion hole 2 with a cylindrical tip. Part 4
A cylindrical strainer body B, which is formed by drilling a filter 5 in the water hole 3 which is bored in the half circumference of the water hole 3 and having a hole 12 having approximately the same diameter as the water supply channel 1 immediately below the water hole 3, can be inserted and removed. In the water heater strainer installed in
A locking pin 8 is inserted into and removed from a locking hole 6 drilled near the opening end of the cylindrical filter body B, and a locking recess 7 drilled at a position matching the locking hole on the proximal end side of the cylindrical strainer body B.漉体B
A strainer for a water heater, characterized in that the strainer can be attached to and detached from an insertion hole 2 of a housing A.