JPH0720454Y2 - Hot and cold water mixing valve with pressure reducing valve - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention mainly eliminates fluctuations in hot and cold water temperature caused by a water pressure difference between cold water and hot water in a wall-mounted hot and cold water mixing tap, and further, a check valve is provided as necessary. The present invention relates to a hot and cold water mixing valve with a pressure reducing valve, which can also have a function.

[Conventional technology]

Conventionally, as a pressure reducing valve, for example, in Japanese Patent Application Laid-Open No. 62-155383, a base end portion of a pressure reducing tubular valve whose tip is detachably opposed to a pressure reducing valve seat provided on the primary chamber side is provided with a double valve. In a tubular valve type pressure reducing valve in which a pressure-sensitive plate that senses and operates a pressure in the next chamber side is connected, a connecting portion between the base end portion of the tubular valve and the pressure-sensitive plate can be freely attached and detached, and The valve for the relief valve is provided at the base end of the valve, and the valve opening for the relief valve that opposes the valve for the relief valve is formed in the pressure sensitive plate, and between the pressure sensitive plate and the tubular valve. A spring for urging the valve seat formed around the relief valve valve opening so as to press-contact the relief valve valve, and the spring pressure of the spring is applied to the pressure sensing plate through the secondary chamber. The pressure is set stronger than the spring pressure of a spring provided so as to face the pressure on the side of the pressure sensing plate, and an opening opening for communicating the relief valve valve opening to the outside is provided on the outer surface side of the pressure sensing plate. Pressure-relief valve is disclosed.
This pressure reducing valve detects the secondary side pressure with a pressure sensitive plate, controls the secondary side pressure with a cylindrical valve that responds to this pressure sensitive plate, and when an abnormality occurs in the secondary side pressure, the valve of the relief valve By opening the mouth, the abnormal pressure is released.

[Problems to be solved by the device]

However, since the above-mentioned conventional pressure reducing valve is a system that uses a pressure sensitive plate, that is, a diaphragm, the valve mechanism itself becomes large, and it is difficult to install it in a small plug housing such as a hot and cold water mixing tap, and it is special. The reality is that it was not used for anything other than a large mixing tap.

By the way, it is known that there is a so-called wall-mounted hot and cold water mixing tap used in bathrooms, kitchens, etc., in which check valves, strainers, etc. can be attached / detached from both sides of the plug casing facing the water and hot water passages. Has been. However, the cold water of the hot and cold water mixing tap is directly introduced from the water pipe, whereas the hot water is introduced into the boiler or the instant water heater to heat it, and then is supplied to the mixing chamber at the same time as the cold water. In addition, the water pressure on the cold water side is usually high, and because the water pressure changes over time in tap water, the temperature of the mixed water extracted from the faucet is often unstable.

In addition, there is a problem in that the hot and cold water mixing tap including only the check valve in the related art cannot effectively avoid the adverse effect of the water hammer or the like generated in the water pipe on the auxiliary equipment of the piping system.

The present invention is intended to solve the above-mentioned problems of the prior art.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention provides a hot-water mixing plug of a wall type in which a check valve and the like are detachably fixed from both sides of the plug housing so as to face the water and hot water passages. Instead of the above, a pressure receiving member that is urged in a direction opposite to the secondary pressure in the valve seat pipe, and a seating surface that is integrally connected to the pressure receiving member and that can abut the valve seat pipe are provided. A means of mounting a pressure reducing valve formed by facing a hollow valve body serving as a water space was taken. Further, a means of incorporating a check valve into the water passage space of the valve body of the pressure reducing valve as needed was used.

[Action]

The pressure reducing valve according to the above configuration, because of its configuration, it is possible to downsize the entire mechanism, it is possible to install in the conventional check valve insertion space, in addition to the normal pressure reducing function, this pressure reducing valve, It also has a pressure-relieving function when abnormally increasing the pressure of the secondary side fluid, and also has a shock absorbing action against a water hammer or the like.

In addition, the one in which the check valve is incorporated in the valve body of the pressure reducing valve is
In addition to the above-mentioned function, it is possible to obtain an effect that the function of preventing backflow to the primary side by increasing the pressure of the secondary side fluid can be additionally provided.

〔Example〕

Hereinafter, the structure of the hot and cold water mixing valve with a pressure reducing valve of the present invention will be described in more detail based on an embodiment shown in the drawings. In FIG. 1, reference numeral 1 is a rear surface and a connection with a crank pipe (not shown) projecting from a wall surface. A wall-mounted hot and cold water mixing tap with a mouth 1 '・ 1', 2 is a mixing chamber with a handle 2'on the upper end, 3 is a faucet pipe, and 4 and 4 can be screwed on both sides of the plug housing 1. It is a holding plate. Then, on both sides of the plug casing 1, there are provided spaces facing the water and hot water passages and detachably holding a check valve and the like. Numerals 5 and 5 are pressure reducing valves which are arranged in the space so as to face the hot water passage and which are detachably held by the holding plate 4.

As shown in FIG. 2, the pressure reducing valve 5 has a hollow valve element 8 attached to a thrust ring 7 fixed to a downstream side of an opening 6 penetrating both side surfaces of the plug housing 1. A pressure receiving member 9 which is slidably supported and whose surface facing the valve body is a pressure receiving surface 9'is integrally configured via a connecting plate a. The pressure receiving member 9 is guided to the inner circumference of a valve seat cylinder 10 which is fitted and fixed to the opening 6 side of the plug housing 1 and is urged by a spring 11 elastically mounted in the direction in which the secondary side fluid pressure acts. ing.

Next, the operating procedure of the pressure reducing valve 5 will be described. First, the fluid flowing from the side of the connection port 1'of the plug casing flows through the hollow valve body through the gap between the valve body 8 and the valve seat cylinder 10. In the pressure reducing valve having the above-described structure, the pressure applied to the valve body 8 that is a movable portion is the seating surface including the seal ring 8 ′ of the valve body 8,
Since the areas of the valve body back surface including the other end periphery of the valve body 8 which is the opposite surface thereof are substantially the same, the liquid pressures applied to the front and back surfaces of the valve body 8 cancel each other out and are pressures that affect the movable direction. Is limited to the fluid pressure acting on the pressure receiving surface 9'on the pressure receiving member side.

Therefore, while the fluid pressure acting on the pressure receiving surface 9'and the urging force of the spring 11 are in equilibrium, the fluid pressure corresponding to the preset spring pressure is supplied to the secondary side, that is, the mixing chamber 2. If the secondary pressure rises above the set pressure due to
11 The balance with the pressure is broken, and the pressure receiving member 9 together with the valve body 8
It moves in the direction of the arrow in the figure, and finally the seal ring 8'of the valve body 8 is fitted into the inner peripheral surface of the valve seat cylinder 10 and intimately closes the flow path to the secondary side.

Further, if the fluid pressure on the secondary side thereafter decreases, the repulsive force of the spring 11 causes the valve body 8 and the valve seat cylinder 10 to separate from each other, so that a fluid with a pressure corresponding to the spring pressure set by the spring 11 is constantly generated. It is supplied to the secondary side.

In addition, the pressure reducing valve 5 has all the above-described components in advance in a separate cylindrical case (not shown) formed between the valve body 8 and the valve seat cylinder 10 and having an opening for the inlet of the primary side fluid. The so-called cartridge type, which is incorporated, makes it easier to attach and detach.

Further, in the hot and cold water mixing valve with the pressure reducing valve of the present invention, the check valve having a proper structure is separately provided in the hollow portion of the valve body 8 in the pressure reducing valve having the above-described configuration.
By installing 12, it is possible to have a check function in addition to the decompression function. The structure of the check valve 12 is not particularly limited, but if one example is shown, as shown in FIG. 3, the back surface of the seal ring 8'of the hollow valve body 8 is seated on the seating surface. The valve shaft 12b of the check valve body 12a, which is 8 ″, is guided by the tubular portion 12c supported by the leg 12d having a water passage area, and is disposed between the valve body 12a and the leg 12d more than the spring 11 of the pressure reducing valve. A weak spring 12e is used.

In this way, the pressure reducing valve with the check valve 12 installed has a reverse force relationship between the pressure receiving member 9 and the spring 12e installed in the check valve 12 when the secondary pressure (mixing chamber side) rises. Since the spring force of the stop valve is weaker, the check valve 12 provided in the hollow portion of the valve body operates first to close the seating surface 8 ″ on the rear surface of the hollow valve body 8 to prevent the secondary side fluid from flowing. Although the reverse flow to the primary side is prevented, if a stronger secondary pressure acts on the check valve, the check valve is pushed and moves in the direction of the valve seat cylinder 10 together with the valve body 8 to finally end. The seal ring 8'of the valve body 8 is fitted into the inner peripheral surface of the valve seat cylinder 10 to reliably shut off the secondary fluid.

In this case, the valve body 8 closed by the check valve moves to the valve seat cylinder 10 side together with the check valve 12 that further receives the secondary pressure, and the volume on the mixing chamber side increases accordingly. As a result, it is possible to obtain the function of reducing or absorbing the adverse effects on the equipment in the downstream piping system due to the secondary side hammer and abnormal pressurization.

[Advantages of the Invention] The hot and cold water mixing valve with a pressure reducing valve described above has at least a high-pressure side fluid flow path (generally, a tap if there is a pressure difference between cold water and hot water supplied thereto). By installing and using it on the water side), the fluid pressure is constantly maintained at a set value, that is, the pressure corresponding to the fluid pressure on the low pressure side, and the change in the hot water temperature due to the inconsistent fluid pressure is ensured during use. A special effect of being able to prevent is obtained. Further, since the pressure reducing valve has a simple structure and is small in size and can be easily attached to and detached from the stopper housing, it is easy to maintain and repair the valve, and also the check valve in the existing wall-mounted hot and cold water mixing tap of this type. It also has the advantage that it can be freely replaced with.

Further, the one in which the check valve is incorporated in the valve body of the pressure reducing valve has a wide range of practical uses, such as inconvenience due to water cutoff or water hammer phenomenon on the primary side and immediate absorption and mitigation of the influence of abnormal pressurization of the secondary side fluid. It can be expected to be effective.

[Brief description of drawings]

FIG. 1 is a plan view showing a main part of a wall-mounting type hot and cold water mixing tap, which is cut away, FIG. 2 is an enlarged cross-sectional view of a central portion showing a structure of a pressure reducing valve and a mounting state of a plug housing, and FIG. It is a center line sectional view of a valve body portion in another embodiment in which a check valve is incorporated in the pressure reducing valve. In the figure, 1 ... Stopper housing, 2 ... Mixing chamber, 3 ... Faucet pipe, 4 ... Holding plate, 5 ... Pressure reducing valve, 6 ... Opening, 7 ... Thrust ring.

Claims (2)

[Scope of utility model registration request] 1. A wall-mounted hot and cold water mixing tap having a space for holding a check valve and the like detachably from both sides of the plug casing, facing the water and hot water passages, and at least one of the space inlets. to, to fix the valve seat cylinder 10, a pressure receiving member 9 is biased in a direction opposite to the secondary pressure in the tube, are interlocking integrally with receiving member 9, it can be seated on the valve seat tube 10 A hot and cold water mixing valve with a pressure reducing valve, in which a hollow hollow valve element 8 is provided oppositely. 2. The hot and cold water mixing valve with a pressure reducing valve according to claim 1, wherein a check valve 12 is incorporated in the hollow portion of the valve body 8 of the pressure reducing valve.