JPS624969A - Valve member for valve - Google Patents

Abstract

PURPOSE:To carry out communicating and blocking operations of a fluid by an operating lever under a stable condition, by forming a slide surface of a ceramics porous material having open pores of a three-dimensional network structure and impregnating a lubricating agent into the open pores. CONSTITUTION:A fixed valve member 13 is fixedly received in a valve body 11, and a fluid passage is formed in the fixed valve member 13. A movable valve member 14 is relatively movable in contact with the fixed valve member 13 by the fixed valve member 13 or an operating lever 17 of the valve body 11 to thereby permit communication and blocking of the fluid passage of the fixed valve member 13. At least one slide surface of the movable valve member 14 is formed of a ceramics porous material. The porous material has open pores of a three-dimensional network structure. At least one lubricating agent selected from a fluorine oil and a silicone oil is impregnated in the open pores.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a valve body for communicating or blocking a fluid passage. This invention relates to an impregnated valve body.

[Conventional technology]

By moving the movable valve body relative to the fixed valve body housed in the valve body while in sliding contact with the operating lever, it is possible to communicate or block the fluid passage, in other words, open/close, switch, adjust, and mix the fluid. Many valves have already been proposed to perform such control.

By the way, there are various demands for this type of valve as follows.

■Even if the fixed valve body and the movable valve body are in close sliding contact, the operation lever should be easy to operate.

(The light operation of the operating lever can be maintained for a long period of time.)

■Maintenance of each square is simple and completely unnecessary.

■Naturally, the adhesion of each valve body [1u] does not improve, and even after long-term use, there is no tAf body 10.

■Manufacturing of each valve body is still in progress, 5. The name H1 valve for fluid, which has already been proposed,
For example, in the case of a pump valve, the distance between each valve body σ)
In many cases, each valve body was formed in a dense state using a relatively hard abrasive material in the form of metal or sintered aluminum oxide in consideration of wear resistance.

This improves the wear resistance of each valve body, but the friction between each valve body! ! 111 is not smooth, and as shown in the 4th figure, the torque of one stroke applied to the operating lever of the hot water M underframe becomes considerably large in the initial stage. Therefore, to ensure smooth sliding, a lubricant is applied to the surface of the valve body. However, the lubricant deposited on the surface tends to flow out, and when used for a long period of time, it is +hs to maintain the operating characteristics of 11) [1.

[Problem that the invention seeks to solve]

In this way, although ceramics themselves have high hardness and excellent wear resistance, they generally lack self-lubricating properties. has not been proposed yet.

The present invention has been developed in view of the above-mentioned circumstances, and its purpose is to always perform fluid communication/cutoff operations using the control lever in a light and stable manner even when using the B41 for a long period of time. C. provides a valve body for a valve that can be used in the following manner.

[Means for solving problems]

The present invention will be explained in detail below.

The valve body of the present invention is a fixed valve body that is fixedly housed in a valve body to form a fluid flow path, or can be moved relative to the fixed valve body by contacting the fixed valve body with an operating lever of the valve body. The first type is used for at least one of a movable valve body which communicates or blocks the oil passage of a fixed valve body, and at least the sliding surface portion has open pores of a three-dimensional network structure. This valve body is characterized in that the open pores of a medium ramic porous body are impregnated with at least one lubricant selected from fluorine-based oil and silicone-based oil.

By the way, the valve body of the present invention is produced by molding ceramic powder, which is an Idemitsu raw material, into a formed body of a desired shape, and bonding the pores existing in this formed body with a ceramic porous body without clogging them. It can be manufactured by impregnating the open pores of the ceramic porous body with at least one lubricant selected from fluorine-based oils and silicone-based oils.

Various methods can be applied to form the ceramic powder into a formed body of any shape and to bond the pores present in the formed body without clogging them.
For example, a method in which the ceramic powder itself is self-sintered by pressureless sintering or pressure sintering, a method in which a substance that generates ceramics is added to the ceramic powder by reaction and sintered, and a method in which the ceramic powder is mixed with CO1Ni, Mo, etc. A method of combining a binder such as metal or glass cement and bonding by normal pressure sintering or pressure sintering, and a method of combining a ceramic powder with a thermosetting resin or thermoplastic resin as a binder. Can be applied.

Advantageously, the ceramic porous body has an open porosity of 5 to 40 volumes. The reason for this is that when the open porosity is lower than 5% by volume, substantial lubricant impregnation is reduced and it is difficult to fully exhibit the lubricating properties; This is because if it is too high, the strength of the porous body is low and the ladle not only easily comes off, but also the lubricant tends to flow out. .

The ceramic porous body has an average crystal grain size of 10 μm.
It is advantageous to be below 1. If the average V:j particle size of the crystal is larger than 10 μnl, the surface roughness of the porous body surface tends to increase. ,! This is because the II dynamic characteristics deteriorate.

It is advantageous that the starting material 4 (ceramic powder) has an average particle size of 10 μm or less. The outpouring is
If a powder with an average particle size of more than 10 μm is used, the number of bonding points between the particles and the particles will be reduced, which will not only make it difficult to produce a high-strength porous body, but also
This is because the surface roughness of the surface deteriorates.

The 41 body for a valve of the present invention has at least lF! selected from fluorine-based oil or silicone-based oil in the open pores of the ceramic porous body manufactured as described above. It is impregnated with + lubricant. The reason for this is that the sliding properties can be significantly improved by impregnating the ceramic base H, which has excellent wear resistance, with at least one persimmon selected from fluorine thread oil or silicone oil, which has excellent lubrication properties. This is because it can be done.

As the fluorine-based oil, one type or a mixture of two or more selected from fluoroesterne, fluoroester, fluorotriazine, perfluoropolyether, fluorosilicone, derivatives thereof, or polymers thereof can be used. It is advantageous to use, as the silicone oil, a mixture of one or more selected from methyl silicone, methylphenyl silicone, derivatives thereof, or polymers thereof. Note that the fluorine-based oil and silicone-based oil can be used in any of liquid, grease, or wax states.

Since the fluorine-based oil and silicone-based oil have excellent solvent resistance, chemical stability, and heat resistance, they can provide extremely good lubrication properties over a long period of time.

As a method for impregnating the lubricant into the open pores of the porous ceramic body, lubricant is heated to have a trt viscosity of +1
1! General methods such as immersing a ceramic porous body in a lubricant and impregnating it under vacuum or pressure can be used.

In this case, the lubricant is applied to the open pores 100 of the porous body.
Advantageously, at least 10 volumes per volume are self-immersed. The reason for this is that if the amount of lubricant impregnated is less than 10 parts by volume, it is difficult to improve the lubricating properties.

[Action of the invention]

The valve body for a valve according to the present invention has the following effects by being configured as described above.

First, by forming the sliding surface of at least one of the fixed valve body and the movable valve body with a ceramic porous body, the ceramic porous body itself has high hardness and excellent wear resistance. As a result, the wear resistance of these fixed valve bodies and movable valve bodies is improved.

Further, the sliding surface portion of at least one of the fixed valve body and the movable valve body is formed of a ceramic porous body having open pores having a three-dimensional network structure, and #J lubricant is impregnated into the open pores. As a result, the itMI lubricity of this lubricant ensures smooth sliding contact between the fixed valve body and the movable valve body for a long period of time.

This actual lubricating property is achieved by constructing the fixed valve body of the above-mentioned fixed valve body and movable valve body with an alumina sintered body and the movable valve body with a silicon carbide porous body impregnated with perfluoropolyether. When considering the experimental results in the case of a drought drop frame with these components assembled inside, the results were as shown in Figure 4.

In this experiment, in order to examine the lubricity of the sliding surfaces between the fixed valve body and the movable valve body, sliding torque fluctuations on the operating lever of the pumping U frame were measured. According to this experiment, even if the operating lever was moved 100,000 times, the sliding torque (A in Figure 4) applied to the operating lever was always less than 8 kgft:yg. The fluctuation range of the sliding torque was approximately 1.51 gfaa or less.

In other words, compared to the sliding torque fluctuation of the operating lever in a conventional mixing faucet (portion in Figure 4), when the valve body according to the present invention is used, the sliding torque on the operating lever is Not only is the torque low, but there is almost no sliding torque fluctuation even after long-term use.

Of course, the above also applies to liquids such as oil, cleaning liquids, various solutions, or various gases as the fluid.

Moreover, instead of the silicon carbide porous body described above, other ceramic porous bodies, such as Ag20s, 8 ioz, Zr
0z, 8iC, TiC1i'ac%B4C%WC1Cr
aC2゜3izl'Ja, BN, TiN, AlN1Ti
Even when a ceramic porous body mainly containing one or more selected from Bz, CrBz, or their compounds is used, substantially the same effect as described above is obtained.

In this valve, since each fixed valve element or movable valve element itself contains lubricant, there is no need for maintenance such as applying lubricant to each valve element as in the past.

(Example) Next, a case where the present invention is applied to a fixed valve body (13) or a movable valve body (14) in a pumping water disassembly frame (10) will be described with reference to the drawings. Figure 1 shows the hot water mixer tap (
10) is shown, and this pumping mixer tap (10) is shown.
) is used to draw out the water or hot water supplied thereto from the faucet (18) either alone or in combination as appropriate.

A support member (12) is housed in the valve body (11) of this pumping U frame (10), and this support part 4i4
(12) A fixed valve body (1B) is fixedly disposed above the fixed valve body (18), and a movable valve body (14) is further disposed above the fixed valve body (18).
) is placed. A connecting member (15) is fixed to the upper part of the movable valve body (14), and when the actuation t<-(16) engaged with this connecting member (15) is moved by the operating lever (17). , move the moving valve body (14) to the internal valve body (
It is designed to be able to slide forward, backward, left and right while being in close contact with IB). //! Type 1 1 Above support member (12)
, the fixed valve body (13), the movable valve body (14), and the connecting portion 44
(15) may be formed integrally with each other, and in this case, the sliding surface portion of the integrally formed body is made of porous ceramic material having open pores with a three-dimensional network structure as described later. It may be formed by a solid body and by impregnating a lubricant into its open pores.

The fixed valve body (18) and the movable valve body (14) are as shown in FIGS. 2 and 8, and are formed with one or more passages (18&) and passages (14a), respectively. ing. These passages (18B) and (14B) are
The number and position of the movable valve body (14) are set so that water and field can be mixed selectively by moving the movable valve body (14) into sliding contact with the predetermined valve body (1B) by operating the operating lever (17). has been done. Of course, these passages (18a) or (14a) may be penetrating or may be mere recesses.

Moreover, FIG. 5 is a longitudinal sectional view of a single faucet (20) using a fixed valve body (13) and a movable valve body (14) according to the present invention. In this single faucet (a'1), the distance between the primary passage (21) and the secondary passage (22) of water! (2
A fixed valve body (13) is placed on B) via a backing, and a movable valve body (14) is further placed at L of this 1IiU fixed valve body (13). This movable valve body (14) is rotated in close contact with the fixed valve body (18) by operating the operating lever (27) provided on the valve body (vague) of the single faucet (2D). As shown in FIG. 6, there is a recess (14b) that selectively communicates with the pair of passages (18a) of the fixed valve body (13) or blocks this communication.
) on its lower surface. That is, the moving valve body (14
) in each passageway (14b) of the fixed valve body (IB).
88), when the positional relationship is as shown in FIG. 7, communication between the primary passage (21) and the secondary passage (22) can be cut off, and as shown in FIG. If the positional relationship is the same, the primary side passage (21) and the secondary side passage (22)
It is now possible to communicate with the

As shown in FIG. 9, a blocking protrusion (140) capable of covering each passage (18B) of the fixed valve element (13) is formed on the lower surface of the movable valve element (14), and the passage (140) is formed around it. 14d
), and this blocking protrusion portion (140)
is the first for each passage (18a) of the fixed valve body (18).
When the positional relationship is as shown by the solid line in Figure 0, the primary side passage (21) and the secondary side passage (22) are communicated, and when the positional relationship is as shown by the imaginary line in Figure 10, It may be implemented by blocking communication between the primary side passage (21) and the secondary side passage (22).

Then, each [ril constant square field (13) as explained above
Alternatively, the sliding surface portion of at least one of the movable valve bodies (14) is formed of a Naramix porous material having one-to-one air release holes in a three-dimensional network structure, and the open pores are impregnated with a lubricant. It is.

Next, each fixed valve body (13) and movable valve body (14) are
Examples and comparative examples in which Naramix mainly composed of silicon carbide are actually produced will be described.

Example 1 The silicon carbide powder used as a starting material consisted of 94.6% by weight β-type crystals, the remainder substantially 11-type crystals, and 0% by weight.
．． 29% by weight free carbon, 0.17% oxygen, 0.
It mainly contained 0.08% by weight of iron, O, Oa and 0.08% by weight of aluminum, and had an average particle size of 0.28μIll, and no boron was detected.

5 parts by weight of polyvinyl alcohol and 800 parts by weight of water were blended with 100 parts by weight of silicon carbide powder, mixed in a ball mill for 5 hours, and then dried.

This dry mixture was collected by a company, granulated, and then molded using a metal mold at a pressure of 8000 kQ/cd.

The dimensions of this generated form are 50 gm x 50 gm x 80
Density in mm is 2. Of//d (62% by volume).

The formed body was placed in a graphite crucible and fired in a Tammann type firing furnace in an atmosphere of mainly argon gas at 1 atm. The temperature raising process was first carried out at 450°C/hour for 2000°C.
The temperature was raised to 2000°C for 10 minutes. The CO gas partial pressure during sintering is 80P& or less at room temperature to 1700°C, and 80P& at higher temperatures than 1700°C.
The argon gas flow was appropriately adjusted and controlled to be within the range of 00±50 Pa.

The density of the obtained porous body was 2.05 fμ, the open porosity was 86% by volume, and its crystal structure was observed using a scanning electron microscope. It has a three-dimensional network structure that is intricately intertwined in the directions, and the linear shrinkage rate of the formed body is within the range of 0.25 ± 0.02% in any direction, and the dimensional accuracy of the porous body is It was within ±0.05 fin. Moreover, the average bending strength of this porous body was 18.5 kQZ-, which was an extremely high value.

This porous body has an outer diameter of 73Q11M and an inner diameter of 11)+g
After processing it into a ring shape with a thickness of 511 mm, it was impregnated by dipping in BELF J Rheolopolyether under vacuum.

The perfluoropolyether impregnated into this porous body accounted for about 90% by volume in the open pores.

A dry sliding test was carried out on this porous W body stainless steel (8U8804) impregnated with perfluoropolyether using the ring-on-ring method in which it was slid at a sliding speed of 500 mt. When I went there,
The friction coefficient is 0.05 to 0.10, and the wear coefficient is 2. I
X IF' wya/Km (kgf/cd), and it was shown that it had extremely excellent sliding properties.

Comparative Example 1 The porous body was the same as in Example 1, but a sliding test was conducted without impregnating it with lubricant, and the friction coefficient was 0.5.
-0.7, wear coefficient is 2.8 XI O-' xtm/
K m (t9f/1-11).

Example 2 Similar to Example 1, but impregnated with methylphenyl silicone instead of perfluoropolyether. The proportion of open pores of methylphenyl silicone impregnated into this porous body was about 90% by volume.

When the sliding characteristics of this porous body were measured in the same manner as in Example 1, the friction coefficient was 0.15 to 0.25, and the wear coefficient was 4.7810-'gm/Km (&wf/Cj). It was found that the material had about 490 times the Ill5 abrasion resistance as compared to the above-mentioned comparative example.

Example 8 The porous body was the same as in Example 1, but the porous body was impregnated with fluoroethylene, fluoroester, fluorotriazine, fluorosilicone, methyl silicone, and fluoropropylmethyl silicone, respectively.

It was noted that all of the porous bodies impregnated with the lubricant had excellent sliding properties.

Example 4 The same method as in Example 1 was used, but a dried product was used in which 1 part by weight of silicon carbide powder was mixed with 1 part by weight of boron carbide powder and 2 small parts of carbon black powder, A porous body was obtained by lowering the firing temperature to 1900°C.

The obtained porous body had an average crystal grain size of about 2.7 μm,
It is connected in a three-dimensional network structure, and the density is 2.86 f/
cd 1 Average bending strength 52 k'jf /iJ TeI
s t t:.

After processing this porous body into the shape of a moving valve body (14), the open pores of the porous body were impregnated with perfluoropolyether at about 90% by volume in the same manner as in Example 1.

Next, the movable valve body made of a porous material impregnated with this perfluoropolyether was assembled into a water outlet mixer faucet as shown in FIG. 1, and a durability test was conducted.

The results are shown in Figure 4.

Note that a dense alumina sintered body was used as the fixed valve body (13).

As can be seen from the results shown in FIG. 4, the valve body of this example had good sliding characteristics over an extremely long period of time.

Example 5 Same as Example 1, but β with an average particle size of 0.28 μm
Compared to type silicon carbide, the average particle size is 88μm and the purity is 99.
8% by weight or more of α-type silicon carbide and an average particle size of 0.8 μm
A porous body was obtained by using a mixed powder with α-type silicon carbide having a purity of 99% by weight or more and increasing the firing temperature to 2800"C.The resulting porous body had a three-dimensional network of crystals. Structurally bonded with a density of 2.76 f/cd and an average bending strength of 1
It was 7.8 ktif/d.

A movable valve body (14) is placed on this porous body in the same manner as in Example 4.
.

After processing into the shape of , it was impregnated with perfluoropolyether and a durability test was conducted.

This moving valve body had good sliding characteristics and good durability.

The following describes the case where a porous body is fired using a material other than silicon carbide as the ceramic material 4.

(2'1) Example 6 2 parts by weight of polyvinyl alcohol, 1 part by weight of polyethylene glycol, 0.5 parts by weight of stearic acid, and 1 part by weight of water for 100 parts by weight of α-type alumina powder with an average particle size of 0.4 μm.
00 parts by weight and spray-dried.

8. Collect the dried material through a wire and use a metal press die. O
Molded at t/cd pressure, diameter 50mm, thickness 2011I
A formed body with an I11 density of 2.6 f/cd was obtained.

The formed body is charged into an alumina crucible and fired for 1 hour at a temperature of 1800 ° C., which is a temperature range in which a liquid phase of 5% or more is not generated during sintering in air under atmospheric pressure.
=.

The obtained porous body had an average grain size of crystals of about 2.4 μm and was bonded in a three-dimensional network structure, and had a density of 2.89/d1 and an average bending strength of 8.119 f/-.

This porous body was processed into a ring shape having an outer diameter of 80 mm, an inner diameter of 1511 mm, and a thickness of 5 m II, and was immersed in perfluoropolyether under vacuum to impregnate it. The proportion of perfluoropolyether impregnated in this porous body in the open pores was about 90% by volume.

A dry sliding test was carried out on the perfluoropolyether-impregnated stainless steel pot (SUB 804/) with an end face load of LO kg VC- by the ring-on-ring method in which it was slid at a sliding speed of 5QQym/see. As a result, the friction coefficient was 0.11 to 0.22, and the wear coefficient was 4.9 x 10''' sus/Km (k
gf/+j), and was found to have extremely excellent sliding properties.

Example 7 Same as Example 6, except that ceramic powder shown in Table 1 was used instead of α-type alumina powder, and the amount of liquid phase generated during sintering was within the range of 8 to 5% by weight. A porous body was obtained by sintering in the following temperature range.

All of the obtained porous bodies had a three-dimensional network structure.

This porous body was processed in the same manner as in Example 6, impregnated with perfluoropolyether, and subjected to a dry sliding test.

The results are shown in Table 1.

Example 8 100 parts by weight of silicon nitride powder with an average particle size of 0.4 ttm was mixed with 2 parts by weight of wax, 1 part by weight of polyethylene glycol, 0.5 parts by weight of stearic acid, and 100 parts by weight of benzene, and the mixture was placed in a ball mill. After soaking for 5 hours, it was dried. Note that the silicon nitride powder contains 2 free silicon.
1.5% electric area, 1.7% by weight oxygen, 1% by weight carbon,
It contained 0.07% iron, 0.2% aluminum, and 0.08% magnesium.

One area of this dried material was collected and 1.5 tons was pressed using a metal mold.
Molded with pressure A, diameter 50 fins, thickness 2 degrees, density 1.
A product shape of 95f/C- was obtained.

The formed body was placed in a graphite crucible and fired at a temperature of 1600° C. for 1 hour in a nitrogen gas atmosphere under atmospheric pressure.

The obtained porous body has crystals connected in a three-dimensional network structure, with a density of 2.88 f/cd and an average bending strength of 16
．． It was 5&gf/gJ.

This porous body was processed in the same manner as in Example 6, impregnated with perfluoropolyether, and subjected to a dry sliding test, and was found to have extremely good sliding properties.

〔Effect of the invention〕

As detailed above, according to the present invention, the fixed valve body (1B)
Alternatively, the sliding surface portion of at least one of the movable valve bodies (14) is formed of a ceramic porous body having open pores having a three-dimensional network structure, and the open pores are impregnated with a lubricant. As a result, even if the fixed valve body (18) and the movable valve body (14) are always in sliding contact, the operation lever can always perform the communication/cutoff operation lightly and stably. We can provide valves that can.

The valve formed in this way not only allows easy (2S) operation using the operating lever for a long period of time, but also has a fixed valve body (13) and a movable valve body (14). It maintains a close sliding relationship over a long period of time, and no fluid leakage occurs.

Of course, this also applies to all types of valves that connect or cut off blood routes for fluids other than water or grout, such as oil, or gases such as propane gas. It is. In addition, in applying the present invention, Al2O5, Sing
, Zr0z, SiC, TiC.

TaC, B4C, We, Cr5Cz, 8iaN4.1
Any one or two selected from 3N%TiN1AIN11'iB2, Crt%2 or a compound of
It can be freely selected from those mainly containing seconds or more.

In addition, each fixed valve body (13) or a moving tit JIVf body (
14) is described above in its entirety.
A similar effect can be obtained even when only the surface portions of 14) that are in sliding contact with each other are formed as described above.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a hot water mixer faucet which is an embodiment of the present invention, FIG. 2 is a longitudinal sectional view showing the relationship between a fixed valve body and a movable valve body, and FIG. Perspective plan view from above,
FIG. 4 is a graph showing a comparison of sliding torque fluctuations between a fixed valve body according to the present invention and a movable valve body, and between a conventional fixed valve body and a movable valve body. In addition, Figures 5 to 1O show examples in which the present invention is applied to a single faucet. Figure 5 is a longitudinal cross-sectional view of this single faucet, and Figure 6 is a diagram showing a fixed valve body and a movable valve body. A perspective view, FIGS. 7 and 8 are plan views showing the relationship between the fixed valve body and the movable valve body, FIG. 9 is a perspective view showing still another embodiment of the movable valve body, and FIG. 10 is a plan view showing the relationship between the fixed valve body and the movable valve body. FIG. 3 is a plan view showing the relationship between a fixed valve body and a movable valve body. Explanation of codes 1G...Hot water mixing faucet, 11...Pulp body, 18.
...Fixed valve body, 14--Movable valve body, 17--Operation lever, 18--Faucet.

Claims (1)

[Scope of Claims] 1. At least one of fluorine-based oils and silicone-based oils is added to the open pores of a ceramic porous body having open pores with a three-dimensional network structure, in which at least the sliding surface portion has open pores. A valve body characterized by being impregnated with a lubricant. 2. The ceramic porous body is made of Al_2O_3, S
iO_2, ZrO_2, SiC, TiC, TaC, B_
4C, WC, Cr_3C_2, Si_3N_4, BN,
The valve body according to claim 1, which mainly contains one or more selected from TiN, AlN, TiB_2, CrB_2, or compounds thereof. 3. The fluorine-based oil is one or a mixture of two or more selected from fluoroethylene, fluoroester, fluorotriazine, perfluoropolyether, fluorosilicone, derivatives thereof, or polymers thereof. The valve body for a valve according to item 1 or 2. 4. The valve according to claim 1 or 2, wherein the silicone oil is one or a mixture of two or more selected from methyl silicone, methylphenyl silicone, derivatives thereof, or polymers thereof. Valve body.