JPH0355010Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is applicable to faucets such as tap water faucets, hot water mixing faucets, flow path switching faucets for hot water washer for toilet bowls, and other various fluid transport pipes. The present invention relates to a valve device, and particularly relates to a valve device in which water is stopped or flow rate is adjusted by slidably overlapping valve bodies.

[Prior Art] A faucet is known in which valve bodies having cutouts or openings are slidably arranged one on top of the other, and the water is stopped or the flow rate is adjusted by rotating or sliding the valve bodies. .

FIG. 2 is a side sectional view showing a conventional example of a hot water mixing faucet, in which the flow rate regulating valve device 2 is installed in the center of the faucet body 1. As shown in FIG. The flow control valve device 2 is made up of valve bodies 3 and 4 which are slidably stacked on top of each other. One of the valve bodies 4 is fixed on the inner bottom 1a of the faucet main body 1, and its upper surface has a mirror surface. It is said to be a shaped sliding surface. Note that a rotating cap 5b is fitted into the upper part of the faucet body 1, and the rotating cap 5b is fitted into the upper part of the faucet body 1.
An operating lever 5 is attached to b so as to be able to swing up and down. Further, an eccentric drive shaft 5a connected to the valve body 3 is vertically provided on the swing shaft of the operating lever 5. Therefore, when the operating lever 5 is operated vertically or horizontally with respect to the faucet main body 1, the valve body 3 slides on the valve body 4 in a watertight manner so that their sliding surfaces rub against each other.

FIG. 1 is a perspective view of these disk-shaped valve bodies 3, 4. As shown in the figure, one of the valve bodies 4 has a substantially circular shape in plan view, and an outflow port 4a is bored in the center thereof, and oblong inflow ports are formed on both sides of the outflow port 4a. Ports 4b and 4c are provided. As shown in FIG.
The outflow port 4b is in communication with the inside, and the water supply chamber 1c is formed at the bottom of the inner bottom 1a of the faucet device 1.
The outflow port 4c is connected to the water supply pipe 6 (shown by a broken line), and the outflow port 4c is connected to a hot water supply pipe (not shown). Further, the valve body 3 has a teardrop-like shape in plan view, and a circular bypass water channel 3a is recessed in the lower surface side of the center as shown in FIG.

Such a valve device 2 controls flow rate adjustment, flow path change, etc. according to the rubbing conditions of the sliding surfaces of the valve bodies 3 and 4, and is used not only for hot and cold water mixing faucets but also for toilets. It is also used as a flow path switching plug for hot water washer (equipment for cleaning the anus, etc.) installed in etc.

In addition, as a valve device, as shown in Fig. 3,
There is also a combination of a pair of valve bodies 7 and 8. The valve body 7 is provided with a sector-shaped opening 7a, and the valve body 8 is provided with a sector-shaped notch 8a. One of these valve bodies 7 and 8 is in a state in which the surfaces of the two valve bodies are stacked on top of each other such that, for example, the valve body 7 is fixed and the other valve body 8 is rotatable around its central axis. It is installed in the cross direction of the waterway. Then, by rotating the valve body 7 and adjusting the overlap between the opening 7a and the notch 8a, water flow, water stoppage, and flow rate adjustment are performed.

Conventionally, the valve body of such a valve device is made of alumina or the like.

[Problem that the invention aims to solve] Because the alumina valve body is made of a hard material, it has less wear and tear, and there are no problems such as deterioration like rubber or rusting or corrosion like metal, and it can be used semi-permanently. be. However, it is difficult to mold, and requires time and money to manufacture, including molding, high-temperature firing, and processing, and if the processing accuracy is poor, water leaks may occur. Additionally, since it does not have self-lubricating properties, valve operation becomes difficult over time, and in the worst case, it may break if forced to move.

In order to solve these problems, the applicant devised a valve device in which the valve body is made of a self-lubricating resin or a resin filled with a self-lubricating filler, and filed an application earlier. (Jitsugan Showa 61-
No. 129881, hereinafter referred to as the "prior application". ).

In the valve device according to the prior application, since the valve body is made of resin, it is resistant to thermal shock, acid and alkali, and has excellent corrosion resistance. Furthermore, it is easy to manufacture, reducing manufacturing costs, and can be manufactured with good dimensional accuracy. Furthermore, since the resin material used is a self-lubricating resin or a resin filled with a self-lubricating filler, the valve body has good lubricity and extremely good sliding characteristics. excellent effects are achieved.

However, in the valve device of the prior application, it was not possible to prevent the occurrence of thermal stress that accumulates in the valve when hot water is continuously passed through the valve device. or,
The frictional heat generated in the sliding portion of the valve body cannot be sufficiently dissipated, and the accumulation of frictional heat causes deterioration of the durability and sliding characteristics of the valve body.

It is an object of the present invention to solve these problems and provide a valve device that has excellent sliding characteristics and is free from the problem of frictional heat accumulation.

[Means to solve the problem]

The valve device of the present invention is a valve device that shuts off water or adjusts the flow rate by a pair of valve bodies having cutouts or openings that are slidably overlapped. The valve body is made of a self-lubricating resin or a resin filled with a self-lubricating filler, and the other valve body is made of a highly thermally conductive material. Ceramics are particularly suitable as the highly thermally conductive material.

In other words, the valve device of the present invention keeps the sliding resistance of the sliding parts low over a long period of time due to the self-lubricating properties of the resin, etc., and also reduces the accumulation of frictional heat due to the heat dissipation promoting effect of the high heat conductive material. It solves problems.

The present invention will be explained in detail below.

In the present invention, examples of the self-lubricating resin constituting one valve body include thermoplastic resins having self-lubricating properties such as fluororesin, aromatic polyester, nylon, polyacetal, and ultra-high molecular weight polyethylene. . Two or more of these resins may be used in combination, or they may be blended with ordinary general-purpose resins.

In addition, the resin used to fill the filler with self-lubricating properties includes thermosetting resins such as phenol, epoxy, and polyimide, or self-lubricating resins such as polyphenylene sulfide, polycarbonate, polyphenylene oxide, and polysulfon. Examples include thermoplastic resins that do not have Examples of the self-lubricating filler filled in these resins include layered minerals such as MoS ₂ , carbon, graphite, talc, and boron nitride.
If the filling amount of these fillers is too small, the effect of improving self-lubricity will be low, and if it is too large, the moldability of the resin will deteriorate. The filler is 15% of the resin to be filled.
A loading of ~250% by weight is preferred.

Note that these fillers having self-lubricating properties can also be filled in the above-mentioned resin having self-lubricating properties, thereby making it possible to further improve the self-lubricating properties. Also in this case, from the viewpoint of moldability of the resin, it is preferable that the filling amount of the filler is 25% by weight or less of the resin.

In the present invention, the resin may be filled with a reinforcing filler if necessary. As reinforcing filler, carbon fiber, glass fiber, SiC whisker, ceramic fiber such as tyranno fiber, nylon,
Plastic fibers such as polypropylene, metal fibers such as steel and stainless steel, SiO ₂ , A ₂
Ultrafine particles such as O ₃ , ZrO ₂ , SiC, TiO ₂ , TiB ₂ , ZrB ₂ and the like can be used. By filling the resin with these reinforcing fillers, the mechanical strength, creep resistance, and abrasion resistance of the resin can be significantly improved.

The amount of reinforcing filler to be filled is generally preferably 15% by weight or less of the resin, since too much will adversely affect the moldability of the resin and the self-lubricating properties of the resulting valve body.

On the other hand, the high heat conductive material constituting the other valve body combined with such a resin valve body may be metal, ceramics, a composite material of metal and ceramics, or a composite material in which plastic is mixed with metal and/or ceramics. etc. can be used. Among these, A ₂ O ₃ , Si ₃ N ₄ , SiC, Sialon, A
It is preferable to use ceramics such as N and ZrO ₂ . Note that when a resin valve body and a ceramic valve body are overlapped and slid, a small amount of resin is first rubbed and adhered to the surface of the ceramic valve body, and the surface of the ceramic becomes smooth. It has the effect of improving properties and lubricity.

The valve device of the present invention uses the above-mentioned resin as the material of one valve body, and _A2 as the material of the other valve body.
Except for the use of a high heat conductive material such as O ₃ , the shape etc. are exactly the same as conventional valve devices, and can be applied to any valve device other than the valve device shown in FIG. 1 or 3. In addition, in the valve device shown in FIG. 1 or FIG. 3, there is no particular restriction as to which of the valve bodies 3, 4 or 7, 8 should be made of resin, and which should be made of a high heat conductive material, and the decision can be made arbitrarily. can do. Generally, it is advantageous to use a valve body made of resin, which is easy to manufacture, as a valve body with a complicated structure.

The valve body of the valve device of the present invention can be easily manufactured by molding according to a conventional method using the above-mentioned self-lubricating resin or resin filled with a self-lubricating filler. By employing a molding method such as injection molding or hot press, it can be manufactured in a shorter time and at lower cost. On the other hand, valve bodies made of highly thermally conductive materials vary depending on the material used, but if they are made of ceramics such as A ₂ O ₃ , they can be manufactured using a sintering method, or if they are metal, they can be manufactured using a casting method, etc. can do.

[Function] Since the valve device of the present invention has one valve body made of resin, it is resistant to thermal shock, acid and alkali, and has excellent corrosion resistance. Furthermore, it is easy to manufacture and can reduce manufacturing costs. Moreover, it can be manufactured with good dimensional accuracy.

In addition, since the other valve body is made of a highly thermally conductive material, even if frictional heat is generated in the sliding portions of both valve bodies, this heat is easily radiated and heat accumulation is prevented. Therefore, the problem of deterioration of durability and sliding characteristics due to heat accumulation is solved.

In addition, the valve body has good lubricity because it is a combination of a resin valve body filled with a self-lubricating resin or a self-lubricating filler and a valve body made of a highly thermally conductive material. Then,
Extremely excellent sliding properties can be obtained.

In particular, when ceramics are used as a material with high sliding properties, they have excellent mechanical strength, hardness, corrosion resistance, etc., and good effects can be obtained. In this case, since the ceramic valve body is used in combination with the resin valve body, problems such as water leakage and lubricity are solved.

[Example] Examples will be described below.

In addition, in the following examples, "parts" indicate "parts by weight."

Example 1 5 parts of carbon fiber (diameter 7 μm, length 3 mm) was dispersed in 100 parts of polytetrafluoroethylene resin powder, pressed at 1000 Kgf/cm ² into the shape of the valve body 4 shown in Fig. 1, and heated at 370°C. It was fired for 30 minutes. Only the rubbing surfaces were mirror-finished.

In addition, a valve body made of A ₂ O ₃ was manufactured by a powder sintering method, and the sliding surface was mirror-finished.

The obtained valve bodies 3 and 4 were attached to the faucet shown in Figure 2, and a water pressure of 40 kgf/cm ² was applied, but there was no water leakage at all, and even in the accelerated durability test corresponding to 10 years, no lubrication was observed. No deterioration in performance such as wear resistance or wear resistance was observed. In addition, it has self-lubricating properties and does not break due to no load being applied to it, and also has extremely excellent durability because it generates and accumulates almost no frictional heat.

Example 2 As the valve body 4, 70 parts of artificial carbon and 30 parts of phenolic resin were thoroughly mixed, hot-pressed into the shape of the valve body 4 at 180°C, and the rubbing surface was mirror-finished, and the same procedure as in Example 1 was used. A practical test was carried out.

As a result, almost the same performance as in Example 1 was obtained.

Example 3 As the valve body 4, 100 parts of ultra-high molecular weight polyethylene, 10 parts of MoS ₂ and carbon fiber (diameter 7 μm,
A practical test was carried out in the same manner as in Example 1 using 5 parts (length: 3 mm) of which were thoroughly kneaded and molded into the shape of the valve body 4 by injection molding.

As a result, almost the same performance as in Example 1 was obtained.

Example 4 Polyphenylene sulfide 65 was used as the valve body 4
1, 25 parts of polytetrafluoroethylene resin powder, and 10 parts of glass fiber (diameter 7 μm, length 3 mm) were thoroughly kneaded and molded into the shape of the valve body 4 by injection molding. A practical test was conducted. As a result, almost the same performance as in Example 1 was obtained.

[Effects of the invention] As detailed above, the valve device of the invention has excellent sliding characteristics and durability due to the self-lubricating property of the resin valve body and the heat dissipation promoting effect of the valve body made of a high heat conductive material. It will be done.

Moreover, one side is a resin valve body, which is extremely easy to manufacture and process, and has good dimensional accuracy.
A valve device having a desired shape that does not cause water leakage or the like can be provided efficiently at low cost.

In particular, in the present invention, by employing ceramics as a highly thermally conductive material, its hardness and
Significantly superior effects can be obtained in terms of mechanical strength, corrosion resistance, etc.

[Brief explanation of the drawing]

1 and 3 are perspective views showing an example of a valve body of a valve device, and FIG. 2 is a side sectional view showing a hot water mixing faucet. DESCRIPTION OF SYMBOLS 1... Faucet main body, 2... Valve device, 3, 4... Valve body, 3a... Bypass waterway, 4a... Outflow port, 4b, 4c... Inflow port.

Claims (1)

[Claims for Utility Model Registration] (1) In a valve device that shuts off water or adjusts flow rate by a pair of valve discs having cutouts or openings that are slidably overlapped, A valve device characterized in that one of the valve bodies is made of a self-lubricating resin or a resin filled with a self-lubricating filler, and the other valve body is made of a highly thermally conductive material. (2) The valve device according to claim 1, wherein the highly thermally conductive material is ceramics.