JPS6319666Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application and overview of the invention] The invention relates to a two-channel simultaneous opening/closing device that simultaneously opens and closes the outbound and return channels of a hot water heating circuit. By reducing the water pressure that acts on the body, the structure to prevent water leakage at the flow path blocking part of the valve body, which is required when the water pressure is large, is no longer required, thereby simplifying the structure of the switchgear. It is something.

[Prior art and its problems] As a dual flow path simultaneous connection device that connects the outgoing path and the return path of a circulation flow path at the same time, for example, Japanese Utility Model Publication No. 50-17087
There is something like the one described in the publication.

This has a structure as shown in Figs. 5 and 6, in which a disk-shaped fixing member 5 is provided with four through holes 14 to 17 arranged at equal intervals in the circumferential direction.
A lid 19 is disposed to cover the through holes 14 to 17 and has a recess 18 formed therein large enough to completely surround the through holes 14 to 17. A disk-shaped rotating member 6 serving as a valve body is housed in the recess 18, and a water chamber 27 is formed between the rotating member and the inner peripheral wall of the recess 18 that houses it, into which hot water flows via a leak hole 26 (described later) drilled in the rotating member 6.

On one side of the rotating member 6 described above, the rotating member 6
A set of arcuate grooves 6 formed along the outer periphery of the
1 and 62 are arranged opposite to each other, and one of the first circular grooves 61 connects the first through hole 14 and the second through hole 1 described above.
5, the other third through hole 16 and the fourth through hole 17 are respectively connected by the other second arcuate groove 62. Further, a leak hole 26 is bored at the bottom of the first arcuate groove 61 formed in the rotating member 6, and the rotating member 6 passes through the leak hole 26 from the front to the back. It's summery.

When the above-described conventional switchgear is installed in a hot water circulation circuit of a hot water heating circuit, the piping is arranged as shown by the imaginary line in FIG. 6. That is, the first
The outgoing path 2a drawn out from the water heater C is inserted into the through hole 14.
The fourth through hole 17 is connected with the return path 2b returning to the water heater C, and the remaining second and third through holes 15 and 16 are connected with the outgoing path and return path of the terminal device D side such as a fan converter. Connect each separately.

In this case, the first and second through holes 14 and 15 bored in the fixed member 5 are replaced by the first circular groove 61 on the rotating member 6 side, and the remaining third and fourth through holes 16 and 17
When these are connected by the remaining second arc-shaped grooves 62 on the rotating member 6 side, a circulation flow path connecting the water heater C and the terminal device D is formed. In this state, when hot water is forcibly supplied from the water heater C, the hot water circulates in the circulation flow path connecting the water heater C and the terminal device D.

In addition, when the terminal device D is not used, as shown by the imaginary line in FIG. The rotating member 6 is rotated so that the arcuate grooves 62 correspond only to the third through holes 16, respectively, and the flow path is blocked.

Since the rotating member 6 and the fixed member 5 are in planar contact with each other, this conventional valve has the advantage that it is easier to process than a ball valve or the like in which the contact surface is formed into a curved surface.

However, in the conventional device described above, it is necessary to form a water chamber 27 surrounding the rotating member 6 and a flow path for guiding the pressure fluid into the water chamber 27, resulting in a complicated structure of the opening/closing device. There was a problem that it would change.

In the above-mentioned conventional device, when the rotating member 6 is set in the closed state, this is the area where the rotating member 6 receives water pressure from the hot water accumulated in the outgoing path 2a drawn out from the water heater C, i.e. This is due to the large pressure receiving area.

To explain the above cause in more detail, in the conventional device, as shown by the imaginary line in FIG. 5 outbound route 2a is connected)
If the valve is closed by responding only to
The entire groove bottom surface of the arc-shaped groove 61 receives the pressure of the pressure fluid (hot water) accumulated in the outgoing path 2a of the water heater C. Therefore, water pressure proportional to the area of the groove bottom of the first arcuate groove 61 acts on the rotating member 6 as a force that tends to push it away from the fixed member 5.

The force pushing the rotating member 6 away from the fixed member 5 is proportional to the area of the groove bottom of the first arcuate groove 61 formed in the rotating member 6, so the force increases. In the conventional type, a leak hole 26 is formed at the bottom of the first arcuate groove 61 to guide hot water to a water chamber 27 formed on the back side of the rotating member 6, and the pressure inside the water chamber 27 is reduced. The rotating member 6 is pressed against the fixed member 5 side by increasing the angle of rotation, thereby ensuring watertightness between the rotating member 6 and the fixed member 5.

In this way, in the conventional one, the fixing member 5
In order to ensure watertightness between the rotary member 6 and the rotary member 6, a leak hole 26 is formed in the bottom wall of the first arcuate groove 61, and a water chamber 27 connected to the leak hole 26 is connected to the rotary member 6. must be formed on the back side of the
This complicates the structure of the switchgear.

[Technical Problem] The present invention is accomplished by ``bringing the rotating member 6 into watertight pressure contact with the surface of the fixed member 5, and inserting the combined body of both into the circulation flow path connecting the water heater C and the terminal device D. The fixing member 5 is provided with first and second through holes 14 and 15 corresponding to the outgoing path of the circulation flow path, and third and fourth through holes 16 and 17 corresponding to the incoming path, respectively.
The rotating member 6 has a first circular groove 61 connecting the first and second through holes 14 and 15, and third and fourth through holes 61 on the surface of the rotating member 6 that is in contact with the fixed member. Hole 1
6, 17 are formed with a second arc-shaped groove 62 that connects each other, and the rotary member 6 can be externally operated by an operating shaft. In order to achieve this, the technical problem is to reduce the area where the rotating member 6 receives water pressure from the accumulated water in the outgoing path 2a drawn out from the water heater C, that is, the pressure receiving area.

[Means] The technical means of the present invention for solving the above problem is "four first to fourth through holes 1 bored in the fixing member 5".
4, 15, 16, 17 are arranged at each vertex of a square, and furthermore, first and second through holes 14, 1
5. Each of the arcuate grooves 61 and 62 on the rotating member 6 side that connects each other and the third and fourth through holes 16 and 17 is located at the center of the four first through fourth through holes 14 to 17. ``It was curved so that it became convex toward the opposite direction.''

[Effect] The above technical means works as follows.

When opening the flow path connecting the flow paths on the water heater C side and the terminal device D side, the rotating member 6
The first arcuate groove 61 formed in the fixing member 5 connects the pair of first and second through holes 14 and 15 with each other.
Further, the other second arcuate groove 62 formed in the rotating member 6 allows the remaining third and fourth through holes 16 and 17 formed in the fixed member 5 to communicate with each other. A circulation flow path connecting C and terminal device D is now formed.

Next, when the rotating member 6 is rotated to close the valve, each arcuate groove 61 formed in the rotating member 6,
62 rotates around the rotation center of the rotating member 6. Then, the first and second arcuate grooves 6
1 and 62 are curved so as to be convex toward the center of the first to fourth through holes 14 to 17, which are arranged to constitute each vertex of the square, so that the rotation When the member 6 is rotated to close,
The two arcuate grooves 61 and 62 are formed on the fixing member 5.
It is located completely apart from the first and second through holes 14 and 15 and the third and fourth through holes 16 and 17 formed in the above, thereby realizing a flow path blocking state.

In this flow path blocked state, the outgoing path 2a (which is in a high pressure state) drawn out from the water heater C
The first or second through hole 14 of the fixing member 5 corresponding to the
15 opens to the rotating member 6, that is, the area where the rotating member 6 receives pressure from the hot water is equal to the opening area of the first or second through hole 14, 15, and the opening area of the rotating member 6 is equal to the opening area of the first or second through hole 14, 15. The pressure-receiving area is extremely small compared to the previously described conventional structure in which the entire groove 61 receives water pressure.

[effect] The present invention has the following unique effects.

Since the pressure-receiving area of the rotary member 6 in the closed state where the rotary member 6 receives water pressure from the accumulated water in the outward path 2a pulled out from the water heater C becomes smaller, the force pushing the rotary member 6 away from the fixed member 5 also becomes smaller. As a result, watertightness between the rotating member 6 and the fixed member 5 can be easily ensured. Therefore, as in the conventional device described above, in order to ensure watertightness between the rotating member 6 and the fixed member 5, there is a water chamber 27 on the back side of the rotating member 6, and pressure fluid (hot water) is introduced into the water chamber 27. There is no need to form a leak hole 26 or the like for this purpose, and the structure of the opening/closing device can be simplified.

In the case of the one of the present invention, the first to fourth through holes 14 to
17 are provided in such a manner that they constitute each vertex of a square, and the distances between adjacent through holes are equal. Therefore, the first through hole 14 or the second through hole 15 to which the outgoing path 2a drawn out from the water heater C is connected,
The third line to which the return route 2b returning to the water heater C is connected
The through hole 16 or the fourth through hole 17 can be short-circuited by the first arc-shaped groove 61 or the second arc-shaped groove 62 of the rotating member 6, and thereby the water heater C and the opening/closing device of the present invention can be short-circuited. A circulation circuit can be constructed between the two. Therefore, when the terminal device D is not used in the cold season of winter, a circulation flow path is formed between the water heater C and the switching device as described above, and in this state, the flow in the circulation flow path is By circulating water, freezing in the circulation channel can be prevented during winter.

[Example] Next, an example of the present invention described above will be described in detail with reference to the drawings.

As shown in FIG. 1, the valve body B is provided with a valve chamber 4, and a disk-shaped fixing member 5 made of ceramic is fixed to the bottom of the valve chamber 4. Further, the fixing member 5 is provided with four through holes, first and second through holes 14, 15, and third and fourth through holes 16, 17, and these four through holes are arranged in each square shape. They are arranged in such a way that they are located at the apex. Further, a packing 53 is accommodated in the annular grooves 54, 54 formed on the outer periphery of the lower end opening of each of the first to fourth through holes 14 to 17, and the gaskets 53 are accommodated in the four through holes on the lower surface of the fixing member 5. 1
~The fourth through holes 14 to 17 ensure mutual watertightness.

A disk-shaped rotary member 6 made of ceramic is in contact with the upper surface of the fixing member 5, and the lower surface thereof is bent inward and has the first and second through-holes with a straight line distance between both ends thereof. The first matching the interval 14,15
An arcuate groove 61 and a second arcuate groove 62 matching those of the third and fourth through holes 16 and 17 are formed, and the fixing member is connected to a flat surface other than these arcuate grooves 61 and 62. The contact surface of the upper surface of 5 with a flat surface other than the through hole prevents fluid leakage from the flow path to the outside and leakage between the flow paths.

Protrusions 55, 55 are formed on the outer periphery of the fixing member 5, and the protrusions 55, 55 function to prevent rotation between the fixing member 5 and the valve body B. On the other hand, notches 63, 63 are provided on the outer periphery of the rotating member 6.
are cut out, and the engagement claws 71, 71 of the drive plate 7 engage with the notches 63, 63. Further, the square head 81 at the lower end of the operating shaft 8 is fitted into the square tube portion 72 of the drive plate 7, thereby enabling the rotating member 6 and the operating shaft 8 to rotate together,
Further, the rotation member 6 is rotated by a spring 9 interposed between the drive plate 7 and a retaining ring 41 provided at the upper end of the valve 4.
A pressure force is applied between the fixed member 5 and the fixing member 5.

It should be noted that when the high-precision finished surfaces of ceramics are in close contact with each other, pressure force due to atmospheric pressure acts in the close contact state, so this spring is not necessarily required when the fluid pressure is low.

In the embodiment described above, the rotating member 6 is the fourth
When in state A in the figure, the first circular groove 61 formed in the rotating member 6 is connected to the first circular groove 61 of the fixed member 5.
The second circular groove 62 connecting the second through holes 14 and 15 and formed in the rotating member 6 connects the second through holes 14 and 15, and
Connecting the fourth through holes 16 and 17, the outward path 2a and the return path 2b
communicate together. Further, when the rotating member 6 is at a position rotated by 45 degrees, the arcuate grooves 61 and 62 of the rotating member 6 are
It is located completely away from the first to fourth through holes 14 to 17 of the fixing member 5, so that the forward path 2a and the backward path 2
b are both cut off.

Furthermore, when the rotating member 6 is rotated 45 degrees from the flow path blocking state to the state shown in FIG.
and the fourth through hole 17 are short-circuited, and a circulation flow path is formed between the water heater C and the valve body B. Therefore, hot water is circulated in the circulation flow path to prevent the inside of the piping from freezing when the terminal device D is not in use.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the embodiment of the present invention, Fig. 2 is an explanatory diagram of the relationship between the fixed member 5 and the rotating member 6, Fig. 3 is an explanatory diagram of the relationship between the operating shaft and the drive plate, and Fig. 4 is an explanation of the function. 5 and 6 are explanatory diagrams of conventional examples, and in the figures, 5...fixing member, 6...rotating member, 14...first through hole, 15...second through hole, 16...Third through hole,
17... Fourth through hole, 61... First arcuate groove, 6
2...Second arcuate groove, C...Water heater, D...Terminal device.

Claims (1)

[Scope of utility model registration request] The rotary member 6 is brought into watertight pressure contact with the surface of the fixed member 5, and the combined body of these two is attached to the water heater C.
and the terminal device D, and the fixing member 5 has first and second through holes 14 and 15 corresponding to the outgoing path of the circulation path and third and fourth through holes corresponding to the incoming path. Holes 16 and 17 are formed respectively, and the first and second holes are formed on the surface of the rotating member 6 that faces the fixed member.
A first arcuate groove 61 connecting the through holes 14 and 15 with each other
and a second arc-shaped groove 62 that similarly connects the third and fourth through holes 16 and 17, and furthermore, a two-flow channel in which the rotating member 6 can be externally operated by an operating shaft. In the simultaneous opening/closing device, four first to fourth through holes 14, 15, 16, 17 bored in the fixed member 5
are arranged at the vertices of a square, and each arcuate shape on the rotating member 6 side connecting the first and second through holes 14 and 15 and the third and fourth through holes 16 and 17 A two-channel simultaneous opening/closing device in which the grooves 61 and 62 are curved to become convex toward the center of the four first to fourth through holes 14 to 17.