JPS6020634B2 - Temperature control valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a temperature recognition valve that discharges fluid below a set temperature by the deformation action of a temperature-sensitive insulated member, and in particular, to a temperature recognition valve that discharges fluid below a set temperature by the deformation action of a temperature-sensitive adhesive member. Regarding temperature control valves that can be discharged.

The hot steel valve above discharges condensate from the heating radiator,
It is used to discharge low-temperature water from a trace piping system that heats and insulates tanks and pipelines with steam or hot water, or to discharge low-temperature water below a set temperature to prevent equipment that uses steam or hot water from freezing.

A conventional temperature control valve has a structure as shown in A of FIG.

That is, the end portion 32 is screwed to the main body 31 to form a casing. Reference numeral 33 denotes a valve chamber formed within the casing, with an inlet 34 communicating through a through hole 36 and an outlet 35 communicating through a valve hole 37 and a through hole 38.

39 is a valve seat member that forms the valve hole 37 and is screwed to the main body 31.

A valve rod 40 is disposed opposite the valve hole 37, has a conical valve body 41 at its tip, and has a rear end iron-coupled with an adjustment rod 42 screwed to the end member 32 so as to be movable forward and backward.

43 is a spring that biases the valve stem 40 in the valve direction.

Reference numeral 44 denotes a bimetal which is stacked between the adjusting member 42 and the spring with the bending directions alternated.

The above-mentioned temperature control valve is controlled by the bending action of the bimetal 44.
0 opens and closes the valve hole 37 to discharge fluid below the set temperature.

Moreover, there is a problem in that it takes time to discharge a large amount of condensate that is temporarily generated during startup or the like. Therefore, conventionally, a temperature control valve A and a bypass valve B are provided as shown in Fig. 4, and when a large amount of condensate occurs below a set temperature, the bypass valve B is opened and the condensate is discharged in a short time. After the discharge, the bypass valve B was closed and the temperature control valve A was used to discharge the condensate below the set temperature.

In this case, the piping before and after the bypass valve B is useless. In order to eliminate piping before and after the bypass valve, it is necessary to configure the temperature control valve and the bypass valve in one piece.

Simply combining a temperature control valve and a bypass valve would result in a complex structure and large size. Therefore, a technical problem of the present invention is to obtain a structure in which a valve and a valve seat can be shared by the valve and the temperature control valve.

The technical means of the present invention taken to solve the above technical problems are as follows.

In a casing that has an inlet, an outlet, and a valve chamber communicating with both ports, a valve pole with a valve hole is arranged so as to be rotatable without being displaced in the flow direction, and the valve ball is rotated to open both ports. Only on the inlet side of the ball valve that opens and closes the valve, a valve seat is placed so that it can move freely so as to be properly spaced from the valve ball, and a temperature-sensitive insulating material that deforms according to temperature changes is placed on the inlet side of the valve seat. However, due to the deformation of the temperature sensitive part, the valve seat is moved away from the valve ball at low temperatures to open a through hole between the valve ball and the valve seat, and at high temperatures the valve seat is brought into contact with the valve ball to open the through hole. Close, something.

Displacement of the valve ball in the flow direction can be achieved by integrating the valve ball, valve ball, and support shaft, or by combining the valve shaft and support shaft into one body, passing through the valve pole. prohibited.

Bimetal, bellows, thermowax, etc. are used for the temperature sensitive material. The operation of the above technical means is as follows.

Normally, the valve ball is rotated to the closed position. When the condensate flowing in from the inlet is below the set temperature, the temperature sensitive part moves the valve seat away from the valve ball, so the condensate flows through the hole between the valve seat and the valve ball and between the casing and the valve pole. is discharged through the outlet. When the condensate temperature exceeds the set temperature, the temperature-sensitive member contacts the valve seat and the valve ball to close the through hole and prevent condensate from being discharged. When discharging low-temperature condensate that is temporarily generated in large quantities, rotate the valve pole to the valve position, direct most of the condensate through the valve hole of the valve ball, and release some of the water between the valve seat and the valve ball. Pass through the hole between the casing and the valve ball and discharge to the outlet. Therefore, by moving the valve seat toward and away from the valve pole of the ball valve in response to temperature changes, it can serve as both the valve body and the valve seat of the temperature control valve. The embodiment shown in FIGS. 1 to 3 will be described.

FIG. 1 shows the valve pole in the closed state, and FIGS. 2 and 3 show the valve ball in the closed state. The main body 1 and the end member 2 form a casing, and the main body 1 and the end member 2 are connected by screwing an adjustment screw 3 to the main body 1.

Airtightness between the main body 1 and the end member 2 is maintained by a gasket 4. An inlet 5 is provided in the end member 2 and an outlet 6 is provided in the main body 1. A valve chamber 7 is formed inside the casing to accommodate an inlet 5 and an outlet 6.
The valve chamber 7 is a substantially cylindrical space along the axis of the inlet 5 and outlet 6. A valve pole 9 having a valve hole 8 therein is accommodated in the valve chamber T.

The valve ball 9 is inserted into the valve chamber 7 through the entrance where the end member 2 of the main body 1 is attached. A spindle insertion hole 10 is formed in the valve ball 9 perpendicularly to the valve hole 8. The insertion hole 10' passes through the center of the valve ball 9. A one-character key book 11 is formed at one end of the insertion hole 10. Reference numeral 25 denotes a valve shaft, which has a part that protrudes outside the casing and attaches a handle, etc., a part with a large diameter that fits into the valve hole 12, and a part that passes through the insertion hole 10 of the valve ball 9 and has its tip inserted into the spindle hole 13. It consists of a round support shaft part 14 and a key part with an iron circle on the key register turtle 8 of the valve ball g.

A support village 15 is arranged on the inlet side of the valve chamber T.

The support member corner 5 includes a cylindrical portion having a fluid passage 16 having approximately the same diameter as the valve hole 8 of the valve ball 9, first and second annular protrusions 17 and blades 8 provided on the outer periphery of the cylindrical portion. A plurality of holes 23 are provided in the cylindrical portion. The first protrusion 17' has a cylindrical protrusion in the direction of the outlet 6, and this protrusion is formed slightly smaller than the inner diameter of the small diameter portion 26 of the main body 1, and is free in the direction of the inlet 5 and outlet 6. be able to move to. The element 9 is a gasket that maintains airtightness between the protrusion of the first protrusion 17 and the small diameter portion 26 of the main body 1. An annular valve seat 20 is provided on the inner periphery of the protrusion of the first protrusion 17. Second
A spring 21 is interposed between the protruding part 18 and the 4th part 26 of the main body 1. A bimetal laminate 22 is interposed between the second projecting turtle 8 and the end member 2. Bimetal laminate 2
2 is a structure in which bimetals are stacked so that their curved directions alternate. 24 is a through hole.

The support member 15 is always subjected to an elastic force in the direction of the inlet 5 by the spring 211, and moves closer to the valve ball 9 when the temperature is high and away from the valve ball 9 when the temperature is low due to the bending action of the bimetal laminate 22.

Therefore, the annular valve seat 20 loosened in the support member 15 is brought into contact with and separated from the valve pole 9 under the action of the bimetal laminate 22 and the spring 21, and the hole 23 provided in the support member 15 is opened from the inlet 5. The through hole 24 opens and closes according to the temperature change of the liquid flowing therethrough.

The opening/closing temperature is adjusted by adjusting the screwing position of the adjustment screw 3 and the main body 1, and the more the adjustment screw 3 is tightened, the lower the set temperature becomes. The valve ball 9 is used as a ball valve and a temperature control valve, and the annular valve seat 2
By using 0 as the valve seat of the ball valve and the temperature control valve, the ball valve and the temperature control valve can share the valve and the valve seat.

Next, the operation will be explained.

When a large amount of low-temperature condensate occurs during startup, etc., the valve pole 9 is placed in the valve position as shown in FIG. The bimetal laminate 22 shrinks in the stacking direction, and the support member 15 supports the spring 2.
It moves in the direction of the entrance 5 due to the elastic force of 1. Accordingly, the annular valve seat 20 mounted on the support member 15 also moves in the direction of the inlet 5, opening the through hole 24, and drains condensate from the valve hole 9 and the through hole 24. After the low temperature condensate has been discharged, the valve ball 9 is moved to the second position.
Make the barrier and layer as shown in Figure 3. Bimetal laminate 22
The bimetal laminate 22 bends according to changes in condensate temperature, and when the temperature is below the set temperature, the degree of curvature of the bimetal laminate 22 is small, as shown in FIG. 2, and the valve ball 9 and valve seat 20 are spaced apart. Condensate is discharged from the holes 24. When the temperature exceeds the set temperature, the degree of curvature of the bimetal laminate 22 increases as shown in FIG. 3, and the valve ball 9 and the valve seat 20 abut against each other and close the through hole 24. The present invention has the following unique effects.

Since the valve ball is opened and closed when a large amount of low-temperature condensate is to be discharged in a short period of time, the valve seat is spaced apart from the valve pole.
4. Can be opened and closed with a small operating torque.

The opening/closing position of the valve ball can be easily adjusted by rotating the valve ball 90 degrees.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the valve ball of the temperature control valve of the present invention at the valve closing position, Figs. This shows the piping structure of the control valve and bypass valve. 1... Main body, 2... End member, 3... End joint screw, 5
... Inlet, 6... Outlet, 7... Valve chamber, 8... Valve hole, 9... Valve ball, 14... Support shaft, 15... Support member, 20... Annular valve Seat, 21...spring, 22...bimetal laminate 24...passing hole, 25...benezumi. Rare 1 figure 2 crab blind 3 figure 4 solution

Claims (1)

[Claims] 1. A valve ball with a valve hole is placed in a casing having a valve chamber communicating with an inlet, an outlet, and both ports so as to be rotatable with no displacement in the flow direction, and the valve ball is rotated to open both ports. Only on the inlet side of the ball valve to be cut off, a valve seat is arranged so that it can move freely into contact with and away from the valve ball, and a temperature-sensitive responsive member that deforms in response to temperature changes is arranged on the inlet side of the valve seat. By deforming the temperature-sensitive member, the valve seat is separated from the valve ball to open a hole between the valve ball and the valve seat when the temperature is low, and the valve seat is brought into contact with the valve ball and the hole is closed when the temperature is high. Adjudication.