JP2015132319A - Hot water and cold water mixing valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water and cold water mixing valve having a function for preventing a trial for discharging mixed water of high temperature exceeding an appropriate temperature range even if the trial is intentionally performed and capable of recovering an original function as the hot water and cold water mixing valve after the trial preventing function is carried out.SOLUTION: There are provided a movable valve member 2 and a fixed valve seat forming member 3 having a valve seat that are arranged in coaxial and moved toward or away from each other in an axial extending direction; a thermosensitive spring 4 for biasing the movable valve member 2 in a direction of approaching to the fixed valve seat forming member 3; the second spring 5 facing against the thermosensitive spring 4 while the movable valve member 2 being held therebetween and for biasing the movable valve member 2 in a direction of moving the movable valve member 2 away from the fixed valve seat forming member 3; a spring pressor 6 engaged with an end part spaced apart from the movable valve member 2; and a manual handle 9 (an adjustment mechanism) for variably adjusting an axial position of the spring pressor 6. Further, there is provided a spring pressor motion stopping mechanism abutting against the spring pressor 6, stopping a motion of the spring pressor 6 and preventing an approaching of the spring pressor 6 toward the movable valve member 2 exceeding an appropriate range of the spring pressor 6.

Description

The present invention relates to a hot and cold mixing valve.

A fixed valve seat forming body having a movable valve body and a valve seat that are arranged coaxially and move away from each other in the axis extending direction, a temperature-sensitive spring that biases the valve body in a direction approaching the valve seat, and a valve body A second spring that urges the valve body in a direction away from the valve seat, facing the temperature-sensitive spring, a spring retainer that engages with an end of the second spring that is separated from the valve body, and an axis of the spring retainer And an adjustment mechanism that variably adjusts the directional position, and joins hot water that has flowed into the temperature-sensitive spring accommodating space from the spring holding side through the gap between the valve seat and the valve body, and hot water downstream of the gap. Patent Document 1 discloses a hot water / water mixing valve in which water flowing into the temperature sensitive spring accommodating space is mixed in the temperature sensitive spring accommodating space and discharged from the temperature sensitive spring accommodating space.
In the hot and cold water mixing valve of Patent Document 1, the temperature sensitive spring expands and contracts according to the temperature of the hot and cold water mixed water in the temperature sensitive spring accommodating space, and the valve body approaches and separates from the valve seat. When the valve body is separated from the valve seat, the flow rate of hot water flowing into the temperature sensing spring accommodating space increases, the temperature of the hot water mixed water in the temperature sensing spring accommodating space rises, and the temperature sensing spring biases the second spring. The valve body extends against the valve seat, approaches the valve seat, and the flow rate of hot water flowing into the temperature-sensitive spring accommodating space decreases. When the flow rate of hot water flowing into the temperature sensing spring accommodating space decreases, the temperature of the hot water mixed water in the temperature sensing spring accommodating space decreases, the temperature sensing spring contracts, and the valve body separates from the valve seat, accommodating the temperature sensing spring. The flow rate of hot water flowing into the space increases. The approach and separation of the valve body from the valve seat is repeated, the distance between the valve body and the valve seat converges to a predetermined value, and the temperature of the hot / cold water in the temperature-sensitive spring accommodating space converges to the predetermined value. When the urging force of the second spring is large, the convergence value of the distance between the valve body and the valve seat becomes large, and the convergence value of the temperature of the hot / cold water mixture becomes high. When the urging force of the second spring is small, the convergence value of the distance between the valve body and the valve seat is small, and the convergence value of the temperature of the hot / cold water mixture is low. The adjustment mechanism is manually operated to variably adjust the axial position of the spring retainer, and thus the distance between the spring retainer and the valve body, and by variably adjusting the urging force of the second spring, the distance between the valve body and the valve seat The convergence value can be variably adjusted, and the convergence value of the temperature of the discharge water of the hot and cold mixing valve can be variably adjusted.

JP 2007-247785 A

In the hot and cold water mixing valve of Patent Document 1, the temperature of discharged water from the hot and cold water mixing valve rises beyond the proper range by manually operating the adjustment mechanism and intentionally exceeding the proper range and bringing the spring retainer close to the valve body. There is a problem that can be made.
SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and is a coaxial valve and a movable valve body and a fixed valve seat that are moved closer to and away from each other in the axis extending direction, and a feeling of biasing the valve body in a direction approaching the valve seat. Engage with the temperature spring, a second spring that faces the temperature sensitive spring with the valve element in between and urges the valve element in a direction away from the valve seat, and an end portion of the second spring that is separated from the valve element. A spring press and an adjustment mechanism that variably adjusts the axial position of the spring press, and the gap between the hot water flowing into the temperature-sensitive spring housing space through the gap between the valve seat and the valve body from the spring press side This is a hot water / water mixing valve that mixes with the hot water at the downstream side and flows into the temperature sensing spring accommodating space and discharges it from the temperature sensing spring accommodating space. Even if you try to discharge high-temperature mixed water that exceeds the above, it has a function to prevent the attempt, after the function is played And to provide a hot and cold water mixing valve which can recover the function of the hot and cold water mixing valve.

In order to solve the above-mentioned problems, in the present invention, a fixed valve seat forming body having a movable valve body and a valve seat that are coaxially arranged and approach and separate in an axial direction, and a direction in which the valve body approaches the valve seat. A temperature-sensitive spring that biases the valve body, a second spring that faces the temperature-sensitive spring across the valve body and biases the valve body in a direction away from the valve seat, and an end of the second spring that is separated from the valve body A spring retainer that engages with the spring and an adjustment mechanism that variably adjusts the axial position of the spring retainer, and flows into the temperature-sensitive spring housing space through the gap between the valve seat and the valve body from the spring retainer side The hot water and the water that has joined the hot water downstream of the gap and flowed into the temperature-sensitive spring accommodating space are mixed in the temperature-sensitive spring accommodating space, discharged from the temperature-sensitive spring accommodating space, and further applied to the spring presser. The spring clamp that stops the movement of the spring clamp and prevents the valve body from approaching beyond the appropriate range of the spring clamp. Providing hot and cold water mixing valve, characterized in that it comprises the example shift preventing mechanism.
In the hot and cold water mixing valve according to the present invention, the movement prevention mechanism abuts the spring retainer to stop the movement of the spring retainer and prevent the valve body from approaching beyond the appropriate range of the spring retainer. The spring retainer cannot be brought close to the valve body beyond the proper range. As a result, discharge of high-temperature mixed water from the hot / cold water mixing valve is prevented. If the adjustment mechanism is manually operated to return the axial position of the spring retainer to the proper position, the hot water / water mixing valve recovers the function of discharging the mixed water at the proper temperature.

In a preferred aspect of the invention, the movement preventing mechanism reduces the flow rate of hot water flowing into the gap between the valve seat and the valve body from the side of the spring press when stopping the movement of the spring press by contacting the spring press. Reduce.
If the movement prevention mechanism also has a function to reduce the flow rate of hot water flowing into the gap between the valve seat and the valve body from the spring holding side, the amount of hot water flowing into the temperature-sensitive spring housing space is reduced. As a result, the hot water mixed valve discharge prevention function of the hot and cold water mixing valve is further improved.
In a preferred embodiment of the present invention, the spring retainer is inserted into the fixed valve seat forming body, and the hot water passes through the gap between the spring retainer and the fixed valve seat forming body and the clearance between the valve seat and the valve body. The spring pressing movement blocking mechanism flows into the temperature-sensitive spring housing space, and includes an outer flange formed at an end portion separated from the spring pressing valve body, and a fixed valve seat forming body that can contact the outer flange of the spring pressing. When the adjustment mechanism exceeds the appropriate range and the spring retainer approaches the valve body, the outer flange of the spring retainer abuts against the end face of the fixed valve seat forming body and prevents the spring retainer from moving. The outer flange of the spring retainer narrows or closes the gap between the spring retainer and the fixed valve seat forming body.
If the spring retainer is inserted through the fixed valve seat forming body, the outer flange formed at the end portion separated from the spring retainer valve body and the end face of the fixed valve seat forming body that can contact the outer flange of the spring retainer Thus, a movement blocking mechanism can be configured. When hot water flows into the temperature-sensitive spring housing space through the gap between the spring retainer and the fixed valve seat forming body and the gap between the valve seat and the valve body, the outer flange of the spring retainer When the outer flange of the spring retainer narrows or closes the gap between the spring retainer and the fixed valve seat forming body when the spring retainer is prevented from moving by contacting the end surface of the seat former, By configuring the relationship with the gap, the amount of hot water flowing into the temperature-sensitive spring accommodating space can be reduced.

1 is a structural diagram of a hot and cold mixing valve according to an embodiment of the present invention. (A) is a longitudinal cross-sectional view, (b) is a B arrow view of (a), (c) is a C arrow view of (a), and (d) is a DD cross section of (a). (E) is an EE cross-sectional view of (a), (f) is an enlarged partial vertical cross-sectional view of a contact portion between a valve body and a valve seat when the valve is closed, and (g) is an open view. It is an expanded partial longitudinal cross-sectional view of the contact part of the valve body and valve seat at the time of valve | bulb.

A hot and cold water mixing valve according to an embodiment of the present invention will be described.
As shown in FIG. 1, the hot and cold water mixing valve 1 includes a movable valve body 2 that is coaxially disposed and moves away from and in the extending direction of the central axis X, a fixed valve seat forming body 3 having a valve seat 3 a, and a valve body 2. In the direction of separating the valve body 2 from the valve seat 3a and the temperature sensitive spring 4 made of a shape memory alloy that urges the valve body 3a toward the valve seat 3a. A second spring 5 to be urged; a spring retainer 6 that engages with an end portion of the second spring 5 that is spaced from the valve body 2; an adjustment member 7 that variably adjusts the position of the spring retainer 6 in the axis X direction; And a cylindrical casing 8 for housing the member.
The casing 8 has a hot water inlet 8a and a water inlet 8b formed on the peripheral side surface, and a mixed water discharge port 8c formed at one end in the longitudinal direction. The valve body 2 has a cylindrical valve body 2 a and a plurality of leg portions 2 b extending from the valve body, and is inserted into the longitudinal center of the casing 8. The leg 2b of the valve body 2 faces the water inlet 8b of the casing 8. The fixed valve seat forming body 3 is a cylindrical body, is inserted into the casing 8 adjacent to the valve body 2 on the other end side in the longitudinal direction of the casing, and is screwed and fixed to the casing 8. The screw fixing portion of the fixed valve seat forming body 3 is sealed. The fixed valve seat forming body 3 has a large inner diameter portion 3 b close to the valve body 2 and a small inner diameter portion 3 c separated from the valve body 2. An annular step portion that forms a boundary between the large inner diameter portion 3b and the small inner diameter portion 3c forms the valve seat 3a. A plurality of vertical grooves 3d extending in the longitudinal direction are formed on the inner peripheral side surface of the large inner diameter portion 3b, and a plurality of vertical grooves 3e extending in the longitudinal direction are formed on the inner peripheral side surface of the small inner diameter portion 3c. A valve body 2 a of the valve body 2 is inserted into the large inner diameter portion 3 b of the fixed valve seat forming body 3. The temperature-sensitive spring 4 is inserted into the casing 8 adjacent to the valve body 2 at one end in the longitudinal direction of the casing 8, one end separated from one end in the longitudinal direction of the casing 8 abuts on the leg 2 b of the valve body 2, and the other end. The casing 8 is in contact with an inner flange 8d formed near one end in the longitudinal direction. The second spring 5 is inserted into the casing 8 adjacent to the valve body 2 on the other longitudinal end side of the casing 8, and one end on the side close to the valve body 2 is in contact with the valve body 2. A portion of the second spring 5 near the valve body 2 extends within the small inner diameter portion 3 c of the fixed valve seat forming body 3. The spring retainer 6 is a cylindrical body in which an outer flange 6 a is formed at the end of the casing 8 on the other end side in the longitudinal direction. The outer diameter of the outer flange 6a is set to a value larger than the inner diameter of the small inner diameter portion 3c of the fixed valve seat forming body. The portion of the spring retainer 6 near the valve body 2 extends in the small inner diameter portion 3 c of the fixed valve seat forming body 3, and the outer flange 6 a faces the hot water inlet 8 a of the casing 8. The outer flange 6 a is in contact with the other end of the second spring 5 on the side away from the valve body 2. A pair of longitudinally extending guide grooves 6b formed between a pair of bifurcated claws extending radially outward from the outer peripheral side surface of the outer flange 6a are formed in the longitudinal direction formed on the inner peripheral side surface of the casing 8. The extending guide protrusion 8e is engaged so as to be relatively movable in the longitudinal direction. The adjustment member 7 extends from the outside of the casing 8 into the casing 8 through the other longitudinal end of the casing 8. The casing longitudinal direction other end penetration part of adjustment member 7 is sealed. One end of the adjusting member 7 adjacent to the valve body 2 is inserted into the valve presser 6 and screwed into the valve presser 6. A manual handle 9 is attached to the other end of the adjustment member 7 protruding from the other end in the longitudinal direction of the casing 8.

The operation of the hot and cold mixing valve 1 will be described.
The hot water that has flowed into the casing 8 through the hot water inlet 8a is a gap between the spring retainer 6 and the fixed valve seat forming body 3, mainly a gap formed by the groove 3e, and the valve seat 3a and the valve body 2 Flows into the temperature-sensitive spring accommodating space of the casing 8 through the gap between the valve body 2a and the gap between the fixed valve seat forming body 3 and the valve body 2a, mainly the gap formed by the groove 3d. To do. Water that has flowed into the casing 8 through the water inlet 8b and merged with the hot water on the downstream side of the gap between the valve seat 3a and the valve body 2a passes through the gap between the leg portions 2b of the valve body 2 through the casing. 8 flows into the temperature-sensitive spring housing space. Hot water and water are mixed in the temperature-sensitive spring housing space of the casing 8, and hot water / water mixed water of appropriate temperature is discharged from the hot water / mixing valve 1 through the mixed water discharge port 8 c.
In the hot / cold water mixing valve 1, the temperature sensitive spring 4 expands / contracts according to the temperature of the hot / cold water mixture in the temperature sensitive spring accommodating space, and the valve body 2a of the valve body 2 approaches and separates from the valve seat 3a. When the valve body 2a is separated from the valve seat 3a, the flow rate of hot water flowing into the temperature-sensitive spring accommodating space increases, the temperature of the hot / cold water in the temperature-sensitive spring accommodating space rises, and the temperature sensitive spring 4 becomes the second spring. 5 extends against the urging force 5 and the valve body 2a approaches the valve seat 3a, so that the flow rate of hot water flowing into the temperature-sensitive spring accommodating space decreases. When the flow rate of hot water flowing into the temperature sensing spring accommodating space decreases, the temperature of the hot water mixed water in the temperature sensing spring accommodating space decreases, the temperature sensing spring 4 contracts, and the valve body 2a is separated from the valve seat 3a. The flow rate of hot water flowing into the warm spring housing space increases. The approach and separation of the valve body 2a from the valve seat 3a is repeated, the distance between the valve body 2a and the valve seat 3a converges to a predetermined value, and the temperature of the hot and cold mixed water in the temperature sensing spring accommodating space converges to the predetermined value. To do. The adjusting member 7 is rotated through the manual handle 9 and screwed into the adjusting member 7 and the spring retainer 6 guided non-rotatably by the guide protrusion 8e is driven, so that the axial position of the spring retainer 6 is extended. By variably adjusting the distance between the spring retainer 6 and the valve body 2a and by variably adjusting the urging force of the second spring 5, the convergence value of the distance between the valve body 2a and the valve seat 3a is variably adjusted. The convergence value of the temperature of the discharge water from the mixing valve 1 can be variably adjusted.

  The manual handle 9 is provided with a safety device that limits the amount of operation to a predetermined range, and consequently restricts the variable adjustment of the axial position of the spring retainer 6 to an appropriate range, but if the manual handle is removed from the adjustment member 7 The safety device will not work. In this state, when the adjustment member 7 is directly operated manually, the spring retainer 6 is moved closer to the valve body 2 beyond the appropriate range, and the temperature of the discharge water of the hot water mixing valve 1 is increased beyond the proper range. The outer flange 6a of the spring retainer 6 abuts against the end face of the fixed valve seat forming body 3 on the side away from the valve body 2, and further approach of the spring retainer 6 to the valve body 2 is prevented. As a result, an inappropriate increase in the flow rate of hot water flowing into the temperature-sensitive spring accommodating space is prevented, and discharge of the high-temperature mixed water from the hot water / water mixing valve 1 is prevented. Further, the outer flange 6a abuts against the end face of the fixed valve seat forming body 3 on the side separated from the valve body 2, so that the outer flange 6a partially forms the inlet portion of the groove 3e formed on the inner peripheral side surface of the small inner diameter portion 3c. Or the groove 3e is partially or completely blocked, and the flow rate of hot water flowing into the temperature-sensitive spring accommodating space is reduced or becomes zero, so that the hot mixed water is discharged from the hot water mixing valve 1. Be blocked. If the adjustment member 7 is manually operated or the adjustment member 7 is manually operated via the manual handle 9 remounted on the adjustment member 7 to return the axial position of the spring retainer 6 to an appropriate position, hot water mixing is performed. The valve 1 recovers the function of discharging the mixed water at an appropriate temperature.

In the above embodiment, the outer flange 6a of the spring retainer 6 is brought into contact with the end surface of the fixed valve seat forming body 3 on the side away from the valve body 2 to prevent the spring retainer 6 from moving. The movement of the spring retainer 6 may be prevented by bringing the outer flange 6a into contact with the formed protrusion.
In the above embodiment, the hot water flows into the gap between the valve seat 3 a and the valve body 2 a of the valve body 2 through the gap between the spring retainer 6 and the fixed valve seat forming body 3. Even in a hot and cold water mixing valve in which hot water flows into the gap between the valve seat and the valve body through the outside of the fixed valve seat forming body, such as a hot water / water mixing valve, The maximum screwing depth can be set to a value that can prevent the valve body from approaching beyond the appropriate range for the spring retainer, or it can be in contact with the end face of the fixed valve seat forming body at a location separated from the spring retainer valve body. If a flange is formed at a part that is separated from the valve body of the spring presser and a protrusion that can contact the flange is formed on the inner peripheral surface of the casing, the valve body that exceeds the appropriate range of the spring presser can be obtained. Can be prevented from approaching.

  The present invention is widely applicable to hot and cold mixing valves.

DESCRIPTION OF SYMBOLS 1 Hot water mixing valve 2 Movable valve body 3 Fixed valve seat formation body 4 Temperature sensitive spring 5 Second spring 6 Spring press 7 Adjustment member 8 Casing 9 Manual handle

Claims (3)

A fixed valve seat forming body having a movable valve body and a valve seat that are arranged coaxially and move away from each other in the axis extending direction, a temperature-sensitive spring that biases the valve body in a direction approaching the valve seat, and a valve body A second spring that urges the valve body in a direction away from the valve seat, facing the temperature-sensitive spring, a spring retainer that engages with an end of the second spring that is separated from the valve body, and an axis of the spring retainer And an adjustment mechanism that variably adjusts the directional position, and joins hot water that has flowed into the temperature-sensitive spring accommodating space from the spring holding side through the gap between the valve seat and the valve body, and hot water downstream of the gap. The water flowing into the temperature-sensitive spring housing space is mixed in the temperature-sensitive spring housing space and discharged from the temperature-sensitive spring housing space. Hot spring water comprising a spring pressing movement blocking mechanism for blocking approach to a valve body exceeding the range A joint venture. The movement blocking mechanism reduces the flow rate of hot water flowing into the gap between the valve seat and the valve body from the spring pressing side when stopping the movement of the spring pressing by contacting the spring pressing. The hot and cold water mixing valve according to claim 1. The spring retainer is inserted into the fixed valve seat forming body, and the hot water flows into the temperature-sensitive spring accommodating space through the clearance between the spring retainer and the fixed valve seat forming body and the clearance between the valve seat and the valve body. The spring holding movement preventing mechanism is formed by an outer flange formed at an end portion separated from the spring holding valve body, and an end surface of the fixed valve seat forming body capable of coming into contact with the outer flange of the spring holding, and an adjusting mechanism If the spring retainer approaches the valve body beyond the appropriate range, the outer flange of the spring retainer abuts against the end face of the fixed valve seat forming body to prevent the spring retainer from moving, and the outer flange of the spring retainer The hot and cold water mixing valve according to claim 2, wherein a gap between the valve body and the fixed valve seat forming body is narrowed or closed.

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