JPS583982Y2 - Box valve for hot water supply - Google Patents

Description

[Detailed description of the invention] When forming a circulation circuit between a water heater and a hot water supply terminal device such as a fan convector, the present invention is arranged near the terminal device and functions as a three-way simultaneous connection device for the circulation circuit. Furthermore, the present invention relates to a box valve for hot water supply that enables opening and closing of a circulation circuit.

This type of box valve for hot water supply was already developed in 1973.
No. 3-75352 (Utility Model Application Publication No. 176130/1989) was proposed. This is a horizontal box valve, consisting of a plug connected to the terminal equipment side and a main body connected to the water heater side. A ball valve B is built into the body so that the ball valve can be closed prior to plug connection and removal.Furthermore, a plug connection part is provided on the top surface of the main body, and a connection part for the water heater side circuit is provided on one of the sides. The hot water supply circuit is bent at right angles within the main body.

In this case, the area occupied by the top surface (or front surface) of the main body is large;
Although it is suitable for use in which the main body is connected to a water heater side circuit parallel to a floor or wall surface, it is unsuitable due to the circuit structure to use such a hot water supply box valve in a type that penetrates a wall surface.

In order to use this wall penetrating box valve, it is necessary to provide a water heater side circuit connection part on the opposite side of the plug connection part.

However, in the hot water supply box valve of the above structure, since the ball valve B is used as a device for opening and closing the flow path in the main body, the rotation angle θ of the operating lever is large (usually 90°).
degree), the cover and wall through-hole housing the main body cannot be made smaller due to the insertion lever.

(Fig. 5) The purpose of this invention is to make it possible to reduce the rotation angle of the operating lever, thereby making it possible to reduce the cover of a linear box valve and the through-hole in the wall for housing the box valve. shall be.

The structure of the present invention is to provide a plug-side connection part on the opposite side of the connection part of the water heater side circuit of the main body, and insert a lift valve type valve body into the Mihara path of the outgoing and return journey inside the main body, respectively, and operate it. A pair of cam bodies are provided on a rotating shaft that rotates together with a lever for use, the valve body and its valve shaft are further provided in the flow path, and the cam body is attached to the valve shaft of the valve body. The operating part of the lever is located on the plug connection part side, and the bottom part of the cylindrical cover is fixed to the circuit connection part on the water heater side.

With the above configuration, the valve body inserted into the flow path in the main body opens and closes when the cam body rotates, so by appropriately setting the shape of the cam body, the valve body The inner flow path can be opened, and the wall through-hole for accommodating the cover accommodating the main body and the box valve for hot water supply becomes smaller.

Since the present invention has the above configuration, it has the following unique effects.

In the case of a box valve that uses a ball valve consisting of a body valve and a pair of seal bodies that press the body valve, the degree of pressure contact between the body valve and the seal body increases due to the body whose temperature is raised by hot water and the difference in thermal expansion between these parts. However, since the configuration of the present invention opens and closes the flow path by a combination of a cam and a lift valve, the above disadvantage can be solved.

In addition, since the valve stem of the valve body that is opened and closed by the operating lever and the cam body that is in contact with the valve body are provided in the flow path,
There is no need for sealing means on the outer periphery of the valve stem as in the publication No. 5-15942.

Therefore, the valve body, which is returned and closed by the spring, does not closely slide against the flow path wall or the packing member in the open state, and the cam body may be damaged due to poor thermal performance (solidification) of the close sliding part. This prevents the inconvenience of not closing the valve even though it is in the closed position.

It should be noted that the rotating shaft provided with the cam body requires an airtight means, but since the rotating shaft can be forcibly rotated by an operating lever, the rotating shaft can also be prevented by hardening of the airtight means such as a gasket. There is no need to worry about the shaft becoming unable to rotate.

Hereinafter, embodiments of the present invention will be explained based on the drawings. In Figs. 1 and 2, 1 is the main body with two independent flow lines extending from the circuit connection part on the water heater side at the bottom to the connection part on the plug side. Channels 2 and 3 are formed, the bottom of which is connected to the water heater side circuit.

A valve device is appropriately disposed within the flow path, and to explain with one side on the side, a self-closing valve body 4 is located near the bottom and has a connection hole that opens to the plug connection portion. Valve bodies 6 are inserted in series near 5, and each valve body corresponds to a valve seat formed in the flow path 2 in a normally closed state.

Further, the tip of the valve shaft 7 of one valve body 4 corresponds to the cam body 10 of the rotation shaft 9 that is rotated by the lever 8 arranged on the side.
The valve stem 11 of the other valve body is located at the center of the connection hole 5, with its tip facing the open end.

Two valve bodies are similarly arranged in the other flow path 3, and the valve body 12 arranged near the bottom corresponds to the other cam body 13 of the rotation shaft, and the valve body is connected to the rotation of the lever 8. The opening and closing operations are performed in synchronization with the other valve body 4.

Connection hole portion 5.14 that opens to the plug connection portion on the top surface of the main body 1
corresponds to the cylindrical portions 16 and 17 protruding from the bottom surface of the plug 15 connected to a terminal device such as a fan convector.
Engagement grooves 19 and 20 are formed in the plug body 18, and correspond to an engagement piece 21 and a swinging piece 22 of the safety device, which will be described in detail below.

That is, in front and behind the plug connection part, an engaging piece 21 of a sliding plate 28 slidably provided on the side and a swinging piece 22 interlocking with the sliding plate are arranged, and the rotating shaft 9 A tongue piece 25 of the rotating plate 24 that engages with the side protruding end and attaches the lever 8 is opposed to a notch 26 formed on the lower side of the sliding plate 23.

In addition, a spring 27 is interposed between the sliding plate 23 and the main body 1 to apply an advancing force to the sliding plate 23, and a square hole 29 having a notch 28 is opened in the center. The upper end of the elevating member 32 can be engaged with a stepped portion 33 of the elevating member 32 which is urged upward by the elevating member 32 and whose upper end protrudes from a part of the plug connecting portion 31 .

The safety device consisting of each of these members is centrally arranged on one side of the main body 1 and covered by a side plate 34, and the base of the lever 8 is attached from the outside and assembled as shown in FIG.

On the other hand, the plug 15 has independent Mihara passages corresponding to the passages 2 and 3 in the main body 1, and each of these passages also has a valve element 35 that regulates the valve opening stroke, which is normally closed. It is inserted in this state, and is connected to a terminal device using a rubber tube or the like from connecting tubes 36 and 37 protruding from the top.

In the hot water supply box valve of the above embodiment, a cylindrical cover is fixed to a through hole drilled in the wall using a tool such as a hole saw, and the main body is inserted into the cylindrical cover in the same manner as in the case shown in Fig. 5. 1, and the plug connection part is located on the indoor side.

On the other hand, the connection part of the water heater side circuit is located outside the room, and the piping terminal of the water heater side circuit arranged on the outside of the wall is connected to the connection part, so that the hot water supply box valve is inserted into the through hole in the wall surface. It will be installed in a usable condition.

To explain the operation of the above-mentioned embodiment in more detail, when the plug 15 is not connected, that is, the state shown in FIG. The moving plate 23 is in the initial state, and the elevating member 32
The tip of the plug protrudes from the plug connection part 31, and the stepped part 33 engages with a cutout part 28 formed in the square hole 29 of the sliding plate 23.

Further, one side of the tongue piece 25 of the rotating plate 24 is in contact with one side 38 of the notch 26 formed on the lower side of the sliding plate.

Therefore, in this state, the opening rotation of the rotation plate 24, that is, the opening rotation of the rotation shaft 9 and the lever 8 is prevented.

Next, the cylindrical parts 16 and 17 of the plug 15 are inserted into the connection holes 5 and 1.
4, the plug connecting portion 31 and the lower surface of the plug body 18 come into contact, and the elevating member 32 descends to raise the stepped portion 3.
3 and the notch 28 are released, and the sliding plate 23 is moved to the main body 1.
It is made to advance by a spring 27 interposed between.

As a result, the engaging piece 21 and the swinging piece 22 move to the state shown in FIG. locked in state.

Incidentally, for the operation of the sliding plate 23 and the rotation of the rotating plate 24, which will be described later, an appropriate margin is provided between the tongue piece 25 and the notch 26.

By connecting the plug 15, the valve body 6 above the channels 2 and 3,
6 and the valve bodies 35, 35 in the plug 15 are both opened.

That is, since the opening stroke of one valve body 35° 35 is appropriately regulated, the cylindrical body 16 of the plug 15,
17 into the connection hole 5.14, the valve stems of the valve bodies 6, 6 initially open the valve bodies 35, 35, and then the other valve body 6, 6 opens.

Therefore, the spring that biases the valve body 35°35 is applied to the other valve body 6.
, 6 are set to be weaker than the springs that bias them.

On the other hand, due to the advance of the sliding plate 23, an appropriate margin is created in the opening movement direction of the tongue piece 25 between it and one side 38 of the notch 26, so that the rotation of the rotating plate, that is, the rotation axis 9 and the lever 8 becomes possible to open, and due to this rotation, the cam body 10.13 of the rotation shaft 9 changes from A to B in FIG.
2 is opened.

At this time, since the shapes of the cam bodies 10.13 are set appropriately in advance, these valve bodies can be opened with a small rotation angle.

With the above steps, the circulation circuit between the water heater and the terminal device is communicated with each other, and the terminal device can be used.

When the terminal device is to be repaired or not used for a long period of time, the lever 8 is rotated to return the valve body 4.12 to the fully closed state, and then the valve body 4.12 is returned to the fully closed position by a certain angle. The return side end surface 39 of the piece 25 comes into contact with one side 40 of the notch 26 to return the sliding plate 23.

As a result, the notch 28 of the square hole 29 and the lifting member 32 are aligned and lifted by the biasing force of the spring 30, and the engaging piece 21 and the swinging piece 22 are removed from the engaging groove 19, 20 of the plug body 18. The plug 15 is pulled out and removed from the main body 1.

In this state, the notch 28 is located below the step 33 of the elevating member 32.
The end of the tongue 25 on the rotating plate 24 and the -11138 of the notch 26 which are in contact with one side have a margin for a small rotation range within the fully closed state of the valve body 4°12. Therefore, it is impossible to open these valve bodies.

In the box pulp of the above-mentioned embodiment, all the valve bodies adopt a sliding valve structure, which has the advantage that it can be manufactured at a lower cost compared to a method using a conventional body valve (ball valve), etc. Moreover, the sliding plate 23 Due to the interlocking operation between the and rotating plate 24, the flow path can be opened and closed only when the flow path is connected, and the plug can be inserted and removed only when the flow path is fully closed, which prevents erroneous operation. Prevented in advance.

In addition, as in the illustrated embodiment, the plug 15 has normally closed valve bodies 35, 35, and the main body 1 has normally closed valve bodies 6°6 and 4,1.
2 is inserted, there is no leakage of circulating water from each flow path when the plano 15 is removed, and staining due to water leakage near the terminal equipment installation area is prevented.

[Brief explanation of drawings]

Fig. 1 is a partially exploded perspective view of an embodiment of the present invention, Fig. 2 is a sectional view of the plug connected state, and Fig. 3 is an engaging piece 21 and a swinging piece 2.
Fig. 4 is an explanatory diagram of the operation of No. 2, and Fig. 4 shows the valve body 4゜12 and the cam body 10.
13, and FIG. 5 is an explanatory diagram of a conventional example, in which 1...main body, 2, 3...channel, 4T12...beak body,
9...Rotation axis, 10.13...Cam body, 15...
plug.

Claims (1)

[Scope of utility model registration request] One side of the main body 1 of the hot water supply box valve is used as a water heater side circuit connection part, and the opposite side of the connection part is used as a plug side connection part, and an outward path and a return path are formed in the main body and connect between the two connection parts. Insert a lift valve type valve body into Miharaji 2 and 3 separately,
A pair of cam bodies are provided on a rotating shaft that rotates integrally with the operating lever 8, and the valve body and its valve shaft are further provided in the Mihara path, and the cam body is connected to the valve of the valve body. A linear box valve for hot water supply, which is made to face each shaft separately, the operation part of the lever is located on the plug connection part side, and the bottom part of the cylindrical cover is attached to the circuit connection part on the water heater side.