JPS6314136Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a valve, and more specifically to the structure of a valve that is installed in a relatively narrow space such as a hot water mixer faucet or an automatic human body private parts washer.

A valve installed in a hot water mixing faucet consists of a valve body installed on a spindle and an annular valve seat.
When the spindle moves in the axial direction and the valve body approaches or moves away from the valve seat, the flow rate passing through the valve decreases or increases.

However, as is well known, in conventional valves, the flow resistance changes greatly with respect to the opening degree of the valve body, so there is a problem that the flow rate changes rapidly.

Therefore, it is an object of the present invention to provide a valve in which the flow rate does not change abruptly when the valve body approaches the valve seat.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 10 denotes a hot water mixing faucet, in which a hot water channel 12, a cold water channel 13, and a mixing channel 14 are formed in the main body 11. Thus, hot water is supplied to the hot water passage 12 through the hot water supply pipe 15 and check valve 16, and cold water is supplied to the cold water passage 13 through the water supply pipe 17 and check valve 18, respectively. Then, the hot water flow path 12 and the cold water flow path 13
communicates with the mixing channel 14 via the on-off valve 19, and the mixing channel 14 further communicates with the connecting pipe 20.
It communicates with an outlet (not shown) through the. The on-off valve 19 has two large and small annular valve seats 2 formed concentrically.
1 and 22, and a valve body 24 fixed to the lower end of the spindle 23. Thus, the spindle 23 is screwed into a plug 27 that is liquid-tightly screwed onto a land 26 formed on the top wall 25 of the main body 11 so as to be movable in the vertical direction. 28, and when the knob 28 is rotated in the illustrated state, the spindle 23 rotates and descends, the valve body 24 seats on both valve seats 21 and 22, and the on-off valve 19 is closed. .

A hole 31 is bored in the right side wall 30 of the main body 11, and a plug 32 is screwed into the hole 31 in a fluid-tight manner. A spindle 33 is screwed into the plug 32, and when a knob 34 fixed to the right end of the spindle 33 is rotated, the spindle 33 rotates and moves in the axial direction.
Therefore, from the top surface 33b of the tip 33a at the left end of the spindle 33, a truncated conical protrusion 3 extends to the left.
3c protrudes, and the tip 33a and the protrusion 33c form a hot water valve body 35. The hot water valve body 35 is paired with an annular valve seat 38 formed on the inner wall 36 and having a stepped portion of the through hole as a seating portion 37 to form a hot water valve 39. In the illustrated state, the tip top surface 33b and the seat 37 are in contact with each other, the hot water valve is closed, and the primary side 12a and the secondary side 12b of the hot water flow path 12 are cut off. When the spindle 33 is moved to the right, the hot water valve 39 opens and the primary side 12a and secondary side 12b of the hot water flow path 12 communicate with each other.

A flange-shaped water valve body 40 is integrally formed in the middle part of the spindle 33.
is a water valve seat 41 formed at the tip opening of the plug 32.
The water valve 42 is paired with the water valve 42. In the illustrated state, the water valve 42 is open and the primary side 13a and the secondary side 13b of the cold water passage 13 are in communication, but it is closed by the rightward movement of the spindle 33, and the cold water passage 13 The primary side 13a and the secondary side 13b are cut off.
Therefore, when the spindle 33 moves to the right, the hot water valve 39 is opened and the water valve 42 is closed.
If either one of them acts in the opening direction due to the axial movement of the spindle 33, the other acts in the closing direction.

Next, to explain the structure of the water valve 42 in more detail based on FIG. A hole 44 and a small diameter hole 45 are sequentially formed, and this large diameter hole 44
The boundary step between the small-diameter hole portion 45 and the small-diameter hole portion 45 serves as a seating portion 46 for the water valve body 40 . Therefore, when the water valve body 40 comes into contact with the seating part 46, the primary side 1 of the cold water flow path 13
3a and the secondary side 13b are cut off. Further, unless the boundary 40c between the right side surface 40a and the outer peripheral surface 40b of the water valve body 40 moves to the left of the boundary 47 between the large diameter hole 44 and the conical surface 43, the cold water flow path 13 passes through the water valve 42. Cold water does not flow from the primary side 13a to the secondary side 13b.

In addition, a pair of flanges 4 are provided on the right side of the water valve body 40.
8 and 49, and a pair of flanges 50 and 51 on the left side.
are formed integrally with the spindle 33, respectively.
Thus, the flanges 48 and 49 can slide inside the plug 32 with the seal ring 52 interposed therebetween, and the flanges 50 and 51 can slide on the cylinder portion 54 of the body 11 with the seal ring 53 interposed therebetween. It is becoming. And flange 48.4
9, 50, and 51 are slightly smaller in diameter than the water valve body 40, and the diameter of the water valve 40 is smaller than the diameter of the hole 31. Thus, the spindle 33 is inserted into the main body 11 by screwing the plug 32 and then screwing the plug 32 into the hole 31.

To describe the operation of the above configuration, in the illustrated state, the hot water valve 39 is closed, so hot water is not supplied to the secondary side 12b of the hot water flow path 12.
On the other hand, the cold water is supplied to the primary side 13a of the cold water flow path 13, and the water valve 4
2 and the secondary side 13b of the cold water flow path 13 to the mixing waterway 14. Therefore, only cold water is discharged via the mixing channel 14 and the connecting pipe 20 from an outlet (not shown).

Next, when the knob 34 is rotated, the spindle 33
moves to the right while rotating. Then hot water valve 3
9 is opened and hot water is supplied to the mixing channel 14 via the secondary side of the hot water channel 12, where the hot water and cold water are mixed and the hot water is discharged from the outlet via the connecting pipe 20. Therefore, when the hot water valve 39 acts in the opening direction, the water valve 42 acts in the closing direction, so if you want to increase the temperature of the hot water, turn the knob 3.
4 further rotates the water valve body 40 integrally formed with the spindle 33 to approach the water valve seat 41, thereby causing the water valve body 42 to act in the closing direction. The amount of cold water passing through the water valve body 42 is
It is determined by the annular area between the boundary portion 40c and the conical surface portion 43 of the water valve seat 42.

Therefore, the annular area between the boundary portion 40c of the water valve body 40 and the conical portion 43 of the water valve seat 42 is completely proportional to the deflection of the spindle 33, and the amount Q of cold water passing through the water valve 42 and the spindle 33 and the deviation L is as shown by line a in the graph shown in FIG. Note that the clearance formed between the water valve body 40 and the large diameter portion 44 from when the water valve body 40 fits into the large diameter hole 44 of the water valve seat 42 until it comes into contact with the seating portion 46 The flow rate is restricted to prevent sudden changes in the flow rate, and the effect of the restriction is reflected as shown in line b in Figure 3.

In conventional hot water mixing faucet valves, when the valve body attached to the spindle approaches the valve seat, especially when the valve is about to close, the flow rate is higher than expected, as shown in line c, which is a problem in the reliability of hot water mixing faucets. However, as is clear from the above description, the hot water/cold water mixing faucet to which the valve mechanism according to the present invention is applied has no such problems and has great practical effects. Note that the valve according to the present invention can be applied not only to a hot/cold water mixing faucet but also to an automatic human body private parts washer, etc.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a hot water mixing faucet to which an embodiment of the valve according to the present invention is applied, Fig. 2 is an enlarged view of part A in Fig. 1, and Fig. 3 is a cross-sectional view of an embodiment of the valve according to the present invention. It is a characteristic diagram. 40... Valve body, 41... Valve seat, 42... Valve, 4
3... Conical surface part, 44... Large diameter hole part, 45... Small diameter hole part, 46... Valve body seating part.

Claims (1)

[Scope of utility model registration request] In a valve comprising an annular valve seat in which a through hole is formed and a valve body facing the annular valve seat, a small diameter hole portion, a large diameter hole portion and the above-mentioned Conical surface portions expanding toward the valve body are sequentially formed, a boundary step between the large-diameter hole portion and the small-diameter hole portion serves as a seating portion for the valve body, and the large-diameter hole portion is fitted into the valve body. A valve characterized by being made substantially watertight together.