JPH0213828Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a self-operated temperature regulating valve that can operate in both forward and reverse directions and is capable of controlling both heating and cooling temperatures.

As an example of this type of temperature regulating valve, as shown in FIG. 1, a bellows chamber 102 containing a bellows 101 detects a temperature change in a portion where the temperature is to be detected by a change in the volume of a sealed fluid. At the same time, the bellows 101 is connected to a valve stem 105 provided reciprocably within the valve box 104, and this valve stem 10
5, a heating valve body 108 and a cooling valve body 109 which are biased by springs 106, 106 respectively in a direction to close the valve hole 107 are attached so as to be slidable in the axial direction. body 1
A structure in which an actuating body 110 is installed between valve bodies 108 and 109 to open valve bodies 108 and 109 is known.

In this temperature regulating valve, when a heated fluid is handled for heating, for example, when the temperature of the part where the temperature should be detected falls below a set value, the volume of the fluid in the heat sensitive part 103 and the bellows chamber 102 decreases, so the valve stem 105 is raised by the biasing force of the spring 111, and the heating valve body 108
This heating valve body 108 is pushed up by
Only the opening is activated. On the other hand, when handling cooling fluid for cooling, if the temperature of the part to be detected exceeds the set value, the volume inside the heat sensitive part 103 and the bellows chamber 102 increases and the valve stem 105 is pushed down. Therefore, the cooling valve body 109 is pushed down by the operating body 110, and only this cooling valve body 109 is operated to open. Furthermore, a dead zone is provided in which both valve bodies 108 and 109 are closed at intermediate temperatures during cooling and heating. This dead zone is constructed by making the length of the actuating body 110 shorter than the distance between the valve holes 107, 107, so that the valve body 109 is connected to the spring 106 during heating, and the valve body 108 is connected to the spring 106 during cooling. , 106.

However, according to the regulating valve having the above structure, since the movement of the valve stem 105 is a reciprocating linear motion in one direction, the valve stem 105 is used for both heating and cooling purposes in which the operating directions are opposite to each other. In this case, two valve bodies 108 and 109 are always required. Therefore, not only the number of parts increases, but also the structure becomes complicated and the cost increases. Moreover, since each valve body 108, 109 is slidably attached to the valve stem 105,
If foreign matter in the fluid enters this sliding part, the valve body 1
08, 109 may be prevented from smoothly sliding, leading to malfunction.

The present invention was developed based on these circumstances, and the purpose is to provide a self-powered temperature regulating valve that can perform both heating and cooling temperature adjustment with a single valve body, has a simple structure, is less likely to malfunction, and is inexpensive. shall be.

That is, in order to achieve the above purpose, the present invention
A valve stem is provided along a direction intersecting an actuation stem that is actuated in response to a change in the volume or pressure of the sensing medium,
A single valve body is provided at the tip of this valve stem, and
An actuating member that contacts the other end of the valve stem is provided at the intersection of the actuating stem with the valve stem, and a contact surface of the actuating member with the valve stem is provided with an actuating member that urges the valve element in the closing direction through the valve stem. A first inclined surface and a second inclined surface are provided on both sides of the neutral protrusion and are inclined in a direction in which the protrusion height decreases as the distance from the neutral protrusion increases to open the valve body. It is characterized by having an inclined surface.

The present invention will be explained below based on an embodiment shown in FIGS. 2 to 6.

In the figure, 1 is a valve box, in which an inflow passage 2 and an outflow passage 3 are formed, and a valve hole 5 is formed in a partition wall 4 that partitions these passages 2 and 3. ing. A valve cover 7 is mounted on the upper surface of the valve box 1 via a heat insulating member 6, and a cylindrical position adjustment member is attached to a neck 8 provided at the center of the upper surface of the valve cover 7 via a lock nut 9. One end of 10 is screwed. A valve stem 11 is inserted into the position adjustment member 10 so as to be slidable in the axial direction, and the lower end of the valve stem 11 is connected to the heat insulating member 6 and the valve cover 7.
It passes through and is led out into the outflow passage 3.
The lower end of this valve stem 11 is formed to have a large diameter,
A single valve body 13 is attached to the lower surface of this large diameter portion 12 and is in close contact with the valve seat surface of the valve hole 5 from the outflow passage 3 side so as to be able to approach and separate from it. A bellows frame 14 is stretched between the large diameter portion 12 of the valve stem 11 and the heat insulating member 6, and this bellows frame 14 prevents the fluid in the outflow passage 3 from flowing into the sliding portion of the valve stem 11. is being prevented.

On the other hand, a chamber holder 16 is screwed into the upper end of the position adjustment member 10 via a lock nut 15, and the upper end of the valve rod 11 is led out into this chamber holder 16. A bellows chamber 1 is provided at one side opening of the chamber holder 16.
7 are connected. The bellows chamber 17 has a hollow cylindrical shape with one side closed.
A disc-shaped guide member 18 that partitions the inside of the chamber holder 7 and the inside of the chamber holder 16 is joined. A prismatic actuation stem 19 is inserted into the bellows chamber 17 in a direction perpendicular to the valve stem 11, and one end of this actuation stem 19 is connected to the guide member 18.
It is slidably inserted into a square hole 20 opened in the center of the hole. Bellows chamber 17 of actuation stem 19
The inner portion is covered with a bellows 21, and one end of this bellows 21 is connected to the guide member 1.
8, and the other end is hermetically joined to the other end surface of the actuating stem 19. The inside of this bellows chamber 17 is communicated through a capillary reach tube 22 with a temperature sensing tube 23 serving as a temperature detection section. This temperature sensing tube 23 is attached to a place where temperature is to be detected, and inside this temperature sensing tube 23, capillary reach tube 22, and bellows chamber 17, there is a sensing medium for temperature detection, such as a coefficient of thermal expansion. A large amount of liquid such as ethyl alcohol is sealed. Therefore,
As the temperature at the detection location increases, the sensing medium inside the thermosensitive tube 23 expands, so the bellows chamber 1
7 increases, and as a result, the bellows 21 is compressed and the actuating stem 19 is pushed in the direction of arrow A in FIG.

Further, a threaded portion 2 is provided at one end of the operating stem 19.
4 protrudes coaxially, and this threaded portion 24 is led out into the chamber holder 16 and is positioned within this chamber holder 16 in a state perpendicular to the upper end of the valve stem 11. There is. A cylindrical actuating member 26 that contacts a ball 25 provided on the upper end surface of the valve stem 11 is screwed into this threaded portion 24 . The actuating member 26 is biased by a spring 27 in a direction opposite to the direction in which the actuating stem 19 moves when the sensing medium expands, and the actuating stem is attached to the outer peripheral surface of the actuating member 26 that contacts the ball 25 19 is in the neutral position, in other words, when the temperature at the location where the temperature should be detected is at the set value, a neutral protrusion 28 is protrudingly provided that presses the valve body 13 in the closing direction through the valve stem 11. There is. Both sides of this neutral protrusion 28, that is, both sides along the moving direction of the operating stem 19, are provided with neutral protrusions 2
8, and the portion located on the right side of the neutral protrusion 28 in FIG. 2 forms a first inclined surface 29 used when heating the detection portion. At the same time, the portion located on the left side of the neutral protrusion 28 forms a second inclined surface 30 used when cooling the detection portion. When the ball 25 is in contact with the lowest part of each inclined surface 29, 30, the valve body 13 is separated from the valve hole 5 to the maximum extent, and the valve hole 5 is fully opened. That is, as shown in FIG. 4, the lowest point of the first inclined surface 29 is point A, the highest point is point B, and the second inclined surface 3
When the highest position of 0 is set as point C and the lowest position as point D, in a state where the ball 25 of the valve stem 11 is in contact within the range from point A to point B and from point C to point D,
The valve body 13 is moved to an arbitrary position between a fully closed position and a fully open position, and the opening area of the valve hole 5 is adjusted to increase or decrease according to temperature changes in the detection portion.

Note that the chamber holder 16 is attached to the actuating member 26.
An adjustment rod 31 coaxially protrudes outward from the valve stem 11, and by rotating the adjustment rod 31, the screwing amount of the actuating member 26 into the valve stem 11 can be changed from the outside. There is.

Next, the operation of the temperature regulating valve configured in this way will be explained.

First, to explain the case where this regulating valve is used to control the flow rate of a fluid for indoor heating, when the temperature is to be detected, that is, the room temperature is at the set value, the spring 27 as shown in FIG.
The urging force of the ball 25 of the valve stem 11 is balanced with the pressure inside the bellows chamber 17.
The neutral protrusion 28 of the actuating member 26 comes into contact with the valve body 13, and the valve body 13 is in the fully closed position. Now, when the room temperature falls below the set value, the sensing medium within the thermosensitive cylinder 23 begins to contract, and the volume within the bellows chamber 17 decreases. Then, the biasing force of the spring 27 overcomes the pressure inside the bellows chamber 17, and the actuating stem 19 and the actuating member 26 are moved forward in the direction of arrow B in FIG.
9 begins to make contact. The first inclined surface 29 is the actuating member 2
Since the protrusion height is gradually reduced along the moving direction of the valve body 13, no force in the closing direction is applied to the valve body 13, and the valve body 13 is pushed upward by the fluid pressure, and as a result, the valve hole is closed. 5 will be held. As the operating stem 19 moves, the valve hole 5 is fully opened when the ball 25 contacts the lowest point of the first inclined surface 29, that is, the point A, and hot water, steam, etc. are supplied to the heating device connected to the downstream side. A heated fluid is guided;
Heating effect is enhanced.

Next, a case will be described in which the above-mentioned regulating valve is used to control the flow rate of fluid for room cooling.

When the room temperature exceeds the set value, the sensing medium of the thermosensitive tube 23 begins to expand, and the volume inside the bellows chamber 17 expands. Therefore, the pressure within the bellows chamber 17 overcomes the biasing force of the spring 27, and as shown in FIG.
5 begins to come into contact with the second inclined surface 30. Since the protrusion height of the second inclined surface 30 is gradually reduced along the moving direction of the actuating member 26, no force is applied to the valve body 13 in the closing direction, and the valve body 13 is moved upward by the fluid pressure. As a result of being pushed up, the valve hole 5 is opened. As the actuation stem 19 moves, the valve hole 5 becomes fully open when the ball 25 contacts the lowest point of the second inclined surface 30, that is, point D, and a refrigerant such as chilled water flows into the air conditioner connected downstream. The cooling effect is enhanced.

In the case of heating and cooling, when the room temperature returns to the set value, the pressure inside the bellows chamber 17 and the biasing force of the spring 27 are balanced, and the actuating stem 19 and the actuating member 26 move in the opposite direction, causing the ball 25 to move again. The neutral protrusion 28 comes into contact with. Therefore, the valve body 13 is pushed down via the valve stem 11, and the valve hole 5 is closed.

According to such a temperature regulating valve, the valve rod 11 is provided perpendicularly to the actuating stem 19 which is reciprocated according to the temperature change of the temperature detection section, and the valve body 1 is attached to the valve rod 11.
3, an actuating member 26 is provided at the intersection of the actuating stem 19 with the valve stem 11, and the first and second inclined surfaces 29, 30 provided on the outer peripheral surface of the actuating member 26 that contacts the valve stem 11. Since the valve body 13 is opened when the operating stem 19 moves forward and backward, the number of valve bodies 13 can be reduced to one even though the valve body is of both forward and reverse operation type. Furthermore, the movement of the actuating stem 19 is simply converted into a linear reciprocating motion in a direction perpendicular to the actuating stem 19 by the sliding contact between the actuating member 26 and the ball 25 of the valve stem 11, so a complicated movement conversion mechanism is required. No longer needed. Therefore, the structure is simple, there are few failures, and reliable operation is obtained, and the number of parts is small, making it possible to reduce costs and reduce size and weight. In addition, the valve body 13
is fixed to the valve stem 11, so the operating stem 1
The movements of the valve stem 9 and the valve stem 11 are directly transmitted to the valve body 13, and the movement of the valve body 13 is not impaired by foreign matter in the fluid, unlike in the conventional case. Therefore, the opening and closing operations of the valve body 13 are performed smoothly, and reliability is improved.

Furthermore, in this embodiment, since the portion through which the valve rod 11 is inserted and the outflow passage 3 are separated by the bellows frame 14, the portion through which the valve rod 11 is inserted is not exposed to the fluid. Therefore, foreign matter in the fluid does not enter the insertion portion, and the reciprocating motion of the valve rod 11 can be maintained smoothly at all times.

In addition, the temperature conditions when opening and closing the valve can be changed by replacing the operating member 26, that is, by removing the previous operating member 26 from the operating stem 19, changing the width of the neutral protrusion 28, and adjusting the width of the first and second inclined surfaces 29, 30. For example, changes in the absolute amount of bellows compression due to an increase or decrease in the sensing medium can be adjusted by rotating the adjusting rod 31 to adjust the angle of inclination of the bellows to the operating stem 19. This can be done by increasing or decreasing the screwing amount of the actuating member 26, and can be easily done from the outside without disassembling the valve.

In addition, in this embodiment, the chamber holder 16 and the valve lid 7 are connected via the position adjustment member 10, so that by loosening the lock nuts 9 and 15 and rotating the position adjustment member 10, this adjustment member can be removed. The amount of screwing between the valve cover 7 and the chamber holder 16 can be freely changed, and the distance from the actuating member 26 to the valve seat surface of the valve hole 5 can be adjusted as appropriate. Therefore, if a gap is created between the valve body 13 and the valve seat surface in the fully closed state where the valve body 13 should originally be in close contact with the valve seat surface due to manufacturing errors, etc. By performing the above operation, the valve body 13 can be brought into the normal fully closed state. Therefore, there is an advantage that high-precision machining is not required, and the position of the valve body 13 can be adjusted from the outside as necessary.

In the above-described embodiment, a mechanism was provided to adjust the distance from the actuating member to the valve seat surface, but it is not necessary to provide this type of mechanism when implementing the present invention. It may be integrated with the holder.

According to the present invention described in detail above, a valve stem is provided along the direction intersecting the operating stem that reciprocates in response to temperature changes, a single valve body is provided on the valve stem, and the valve stem in the operating stem is provided with a single valve body. An actuating member is provided at the intersection with the rod, and the outer peripheral surface of this actuating member that contacts the valve rod has a neutral protrusion that presses the valve body in the closing direction, and a neutral protrusion located on both sides of the neutral protrusion that operates to open the valve body. Since the first and second inclined surfaces are provided to allow the operating stem to move forward and backward, the valve body can be opened respectively when the operating stem moves forward and backward. It can be done. Moreover, since the movement of the actuating stem is simply converted into a reciprocating linear movement in a direction that intersects the actuating stem by contact between the actuating member and the valve stem, a complicated motion conversion mechanism is not required. Therefore, the structure is simple, there are few failures, and operation is reliable, and the number of parts is small, making it possible to reduce size, weight, and cost.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a general self-powered temperature regulating valve.
2 to 6 show an embodiment of the present invention,
Fig. 2 is a sectional view, Fig. 3 is an external view of the middle part of Fig. 2, Fig. 4 is an explanatory drawing showing the operating members and temperature conditions when opening and closing the valve, and Figs. 5 and 6 are action explanatory drawings. be. 11... Valve stem, 13... Valve body, 19... Operating stem, 23... Temperature detection section (temperature sensing tube), 26...
Actuation member, 28... neutral protrusion, 29... first inclined surface, 30... second inclined surface.

Claims (1)

[Scope of utility model registration request] The temperature change in the part where the temperature is to be detected is detected by a sensing medium sealed in the temperature sensing section, and the sensing medium causes the operating stem to reciprocate, and the operating stem increases the temperature of the temperature sensing section. In this self-operating temperature regulating valve, which operates in both forward and reverse directions, the valve body is opened or closed when the valve body is open or closed. At the same time, an actuating member that contacts the other end of the valve stem is provided at the intersection of the actuating stem with the valve stem, and the contact surface of the actuating member with the valve stem is provided with a A neutral protrusion biasing the body in the closing direction is provided, and the neutral protrusion is located on both sides of the neutral protrusion in the reciprocating direction of the operating stem, and is inclined in a direction such that the protrusion height decreases as the distance from the neutral protrusion increases. A self-operated temperature regulating valve characterized in that a first inclined surface and a second inclined surface are provided for opening the valve body.