JPH10132109A - Flow proportional valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust flow so as to drive a plurality of valves by using one actuator and match each valve element to a flow characteristic proper to passage where each valve is arranged. SOLUTION: Flow regulating valves 13, 15 are respective arranged in valve seats 8 and 11 disposed independently in a valve element 4, an output shaft of one actuator is branched out into plural output member 24, 28 by a gear to thereby connect each output member to an advance/retreat mechanisms 12, 14 of each flow regulating valve 13, 15. Then, speed change gears are provided in at least one output member 24 to constitute a flow proportional valve.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of controlling the flow rate of hot water individually for each room or for each heat radiating portion in a floor heating or the like using hot water, which can be controlled by one motor actuator. And a flow proportional valve.

[0002]

2. Description of the Related Art For example, in floor heating using hot water,
In one building, the difference in heat load between the south side room and the north side room is extremely large due to sunlight in the south side room and heat dissipation from the outer wall due to north wind in the north side room. It is necessary to adjust the amount of hot water for each hot water pipe. Also, the heat load of each room varies greatly during the day, and when the sun rises, it is necessary to reduce the amount of hot water in each room as a whole. As described above, in floor heating using hot water, it is necessary to adjust the distribution of the hot water amount to a plurality of rooms and to adjust the hot water amount corresponding to the heating load in each room. Such adjustment is often necessary not only in hot water heating but also in adjusting the flow rate of fluid to various devices.

Conventionally, when adjusting the fluid flow rate for a plurality of flow paths as described above, a flow rate control valve device including an independent valve element such as a motor-operated valve and its actuator is arranged in each flow path, and this is used. Each was controlled by the control device.

[0004]

In the above-mentioned conventional apparatus, when adjusting the fluid flow rate to a plurality of flow paths, a flow control valve apparatus having an independent valve element in each flow path is arranged, It had to be controlled by a controller.
For this reason, an actuator such as a motor is required for each valve element, and a control device for obtaining an independent output for each actuator is also required. For this reason, the cost of the valve device-related equipment is increased, and a space for installing each flow control valve is required, and there is a disadvantage that the size is increased.

Therefore, according to the present invention, a plurality of valve elements can be driven by one actuator, and the flow rate can be adjusted so that each valve element can be adapted to the flow rate characteristic of the flow path in which each valve element is arranged. It is an object of the present invention to provide a small and inexpensive flow proportional valve.

[0006]

According to the present invention, in order to solve the above-mentioned problems, a flow control valve element is arranged on a plurality of valve seats independently provided in a valve body so as to be able to advance and retreat, and one actuator is provided. The output shaft of which is branched into a plurality of output members by gears, each output member is connected to the advance / retreat mechanism of the flow regulating valve body, and at least one output member is provided with a transmission to constitute a flow proportional valve. It is.

[0007] The present invention is configured as described above.
By actuation of the actuators, all of the respective flow regulating valve bodies provided on a plurality of valve seats independently provided in the valve body are advanced and retracted by the output member branched from the output shaft of the actuator, The flow rates of the fluid flow paths independently provided on the valve seat are adjusted at the same time. Further, the flow control valve element driven by the output member provided with the transmission is different from the flow control valve element driven by the output member provided with the transmission member having no transmission or a transmission ratio different from this. The flow rate can be adjusted by the flow rate adjustment characteristic, a plurality of valve elements can be driven by one actuator, and the flow rate is adjusted so that each valve element can be adapted to the flow rate characteristic specific to the flow path in which each valve element is arranged. be able to.

[0008]

Embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, a valve body 4 having a fluid inflow path 1, a first outflow path 2, and a second outflow path 3 has a first valve body chamber 5 communicating with the first outflow path 2, (2) a second valve body chamber (6) communicating with the outflow passage (3), a first flow path (7) and a first valve seat (8) provided between the first valve body chamber (5) and the inflow passage (1); A second flow path 10 and a second valve seat 11 are provided between the first flow path and the inflow path 1. In this embodiment, the first valve seat 8 is moved from the second valve seat 11 to the second valve seat 11.
When this valve is used for controlling the amount of hot water for hot water heating, a small-diameter first chamber is provided in the south-side room with a small heating load.
The first outflow passage 2 communicating with the valve seat 8 is communicated, and the northern chamber having a large heating load is communicated with the second outflow passage 3 communicating with the large-diameter second valve seat 11.

A first cam 12 is provided in the first valve body chamber 5,
A first flow control valve 13 having a conical surface is disposed on the first cam 12 so as to be constantly pressed against the first cam 12.
3 is inserted through the first valve seat 8 into the first flow path 7. Similarly, a second cam 14 is provided in the second valve body chamber 6, and a second flow control valve 15 having a conical surface is disposed on the second cam 14 so as to be constantly in pressure contact with the second cam 14. The conical surface of the regulating valve 15 is inserted from the second valve seat 11 into the second flow path 10.

On the other hand, as shown in FIG. 2, the DC stepping motor 20 fixed to the outside of the valve body 4 is provided with an internal reducer 21, and a motor pinion 23 is fixed to an output shaft 22 from the internal reducer 21. ing. A connecting portion 19 at the end of the first camshaft 24 of the first cam 12 is connected to an end of the motor pinion 23. Also, motor pinion 2
3 is provided on the support plate 2 so that the first reduction gear 25 meshes with the support plate 2.
6 is supported between the valve body 4 and the valve body 4. The first reduction gear 25 meshes with the second reduction gear 27, and the second reduction gear 27 is fixed to the second cam shaft 28 of the second cam 14, and these members constitute a flow proportional valve 30. I have.

When the flow proportional valve 30 is operated, as shown in FIG. 1, the portions of the first cam 12 and the second cam 14 where the lift amounts are large are the first flow control valve 13 and the second flow control valve 15 respectively. If it exists at the position facing the end face of
The first flow control valve 13 is pressed against the first valve seat 8,
The flow control valve 15 is pressed against the second valve seat 11 to close each valve portion. Thereby, in the valve body, the fluid from the inflow channel 1 does not flow to the first outflow channel 2 and the second outflow channel 3.

When the stepping motor 20 is driven from this state, the output shaft 22 is rotated via the internal speed reducer 21, whereby the first camshaft 24 is connected to the output shaft 22 via the motor pinion 23 and the connecting portion 19. Spin at high speed. In addition, the rotation of the motor pinion 23 causes the speed of the second camshaft 28 to be reduced from the speed of the output shaft 22, that is, the speed of the first camshaft 24 via the first reduction gear 25 and the second reduction gear 27 that mesh with the rotation of the motor pinion 23. Rotated. The rotation of the first cam shaft 24 causes the first cam 12 to rotate, and the portion in contact with the end of the first flow control valve 13 gradually shifts from a portion having the largest lift to a portion having a smaller lift. Therefore, the first flow control valve that is in pressure contact with the first cam 12 is separated from the first valve seat 8,
This valve seat opening is opened.

At this time, the rotation of the second camshaft 28 causes the second cam 14 to rotate, and the portion in contact with the end of the second flow control valve 15 is lifted similarly to the operation of the first cam 12. From the largest portion to the portion with a smaller lift amount. Therefore, the second flow control valve 15 that is in pressure contact with the second cam 14 separates from the second valve seat 11 and opens this valve seat opening. The opening speed is determined by the action of the first reduction gear 25 and the second reduction gear 26 as the transmission mechanism.
The opening is slower than the opening speed of the first valve seat 8. When the decelerated second cam 14 moves to the position of the set opening, the position of the first cam 12 is set by the pulse of the stepping motor 20 while securing the position. At this time, the setting of the second cam 14 is lost, but the movement of the first cam 12 and the second cam 14 is controlled by the first reduction gear 25 and the second reduction gear 2.
Since there is a deceleration rate by the gear train No. 6, the deviation is, for example, 1/20 to 1/30, and does not significantly affect the resolution of the set flow rate. Therefore, after setting the opening of the second valve seat 11 first, the opening of the first valve seat 8 can be set, and each of the first valve seat 8 and the second valve seat 11 can be arbitrarily set. It can be set in proportion to the valve opening.

At this time, in the drive mechanism of the first flow control valve 13, when the first flow control valve 13 reaches the maximum opening, the first cam 12 is kept at that position regardless of the rotation of the motor pinion 23. It is preferable to provide a conventionally known mechanism for stopping the rotation of. Thereafter, when the stepping motor 20 further rotates, the second cam 14 also rotates to the maximum opening position and stops at that position.

When the opening of the valve is adjusted by the cam as described above, the flow control valve can be pressed by interposing a damper. This embodiment is shown in FIG. As shown in the drawing, the first flow control valve 13 is connected to a damper piston 33 in a damper chamber 32 provided in the valve body via an interlocking stem 31 extending so as not to hinder the operation of the first cam 12. As a result, the operation of the cam can be reliably followed by the action of the fluid in the damper chamber. This function is preferably provided on the valve body side connected to the output member on the high-speed side where no speed reducer is provided. The control for opening these valves is performed by a known stepping motor control circuit (not shown).

The opening speeds of the first and second valve seats can be adjusted by a single stepping motor, and the opening ratio is controlled by a transmission provided in a drive mechanism of the second cam. Can be arbitrarily adjusted according to the reduction gear ratio of the reduction gear. Even if the opening areas of the first valve seat and the second valve seat are different, by setting the gear ratio in consideration of the area, the desired opening State can be set.

[0017]

The present invention is configured as described above.
By the operation of one actuator, the output members branched from the output shaft of the actuator cause all of the respective flow control valve bodies provided on a plurality of valve seats independently provided in the valve body to advance and retreat. The flow rate of the fluid flow path independently provided for each valve seat can be adjusted simultaneously, a plurality of valve elements can be driven separately by one actuator, and the valve opening can be set separately. Therefore, each of the first valve seat and the second valve seat can be set in proportion to an arbitrary valve opening. Further, the flow control valve element driven by the output member provided with the transmission is different from the flow control valve element driven by the output member provided with the transmission member having no transmission or a transmission ratio different from this. The flow rate can be adjusted by the flow rate adjustment characteristics, and the flow rate can be adjusted so that each valve element can be adapted to the flow rate characteristic specific to the flow path in which each valve element is arranged.

[Brief description of the drawings]

FIG. 1 is a partial sectional view taken along the line AA of FIG. 2 according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of an embodiment of the present invention.

FIG. 3 is a sectional view showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inflow path 2 1st outflow path 3 2nd outflow path 4 Valve body 5 1st valve body room 6 2nd valve body room 7 1st flow path 8 1st valve seat 10 2nd flow path 11 2nd valve seat 12th 1 cam 13 first flow control valve 14 second cam 15 second flow control valve 19 connecting portion 20 stepping motor 21 internal speed reducer 22 output shaft 23 motor pinion 24 first cam shaft 25 first reduction gear 26 support plate 27 second Reduction gear 28 Second camshaft 30 Flow proportional valve

Claims (4)

[Claims] 1. A flow control valve element is disposed at a plurality of valve seats independently provided in a valve body so as to be able to advance and retreat, and an output shaft of one actuator is branched by a gear into a plurality of output members. A flow proportional valve, wherein each output member is connected to an advance / retreat mechanism of a flow control valve body, and at least one output member is provided with a transmission. 2. The flow proportional valve according to claim 1, wherein the sizes of the openings of the plurality of valve seats are changed. 3. The flow proportional valve according to claim 1, wherein a damper is provided on the flow regulating valve body. 4. The flow proportional valve according to claim 3, wherein said damper is provided on a flow regulating valve body connected to an output member having no transmission member.