JP2016003660A - Heat-sensitive valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat-sensitive valve capable of suppressing the closure of a valve cooled by water flowing when the valve is opened, the occurrence of chattering, and requiring neither a parent valve nor a slave valve so that it can be suppressed only by the slave valve.SOLUTION: A body structure 10 is disposed midway of a water pipe P having a predetermined diameter; a thermal expansion member 1 is disposed in the upper portion of said body structure; and a poppet valve 11 biased by a push spring 15 is disposed below said body structure 10 and midway of the water pipe P, so that said poppet valve 11 is opened/closed by the increase or decrease of the volume of said thermal expansion member 1.

Description

  The present invention relates to a heat sensitive valve.

  Conventionally, in various facilities such as a solar panel, a roof, a wall, a park, and a work site, watering is performed by a watering device such as a sprinkler for cooling or watering. A temperature sensor such as a thermostat, a humidity sensor, and a solenoid valve are generally used for automatic control of the start and stop of watering in the watering device.

  Although the solenoid valve is driven by electricity, automatic control that does not require electricity is desired. For example, automatic control by a thermal valve has been proposed. The heat-sensitive valve controls the start and stop of watering by utilizing the thermal expansion of a thermal expansion member such as wax contained therein. For example, as in Patent Document 1.

  In the above heat sensitive valve, water sprayed on the heat sensitive valve body flows, so when there is a large amount of water flowing when the valve is opened, the heat expansion member is cooled by the flowing water, the valve closes, and sufficient water can be sprayed. There is a risk of disappearing. In addition, the pressure of the flowing water may cause vibration (chattering) of the movable part of the valve, which may cause non-uniform watering.

  Furthermore, there is a thermal valve that suppresses the closing of the valve by cooling with water flowing when the valve is opened, and suppresses the occurrence of chattering. For example, as in Patent Document 2.

  However, the thermal valve is provided with a main water channel that leads from the inlet into which water flows in to the main outlet, and a sub water channel that branches from the main water channel and leads to the sub outlet, and opens the main water channel. It has a parent valve that closes and a child valve that opens and closes the sub-water channel, and the child valve controls the start and stop of watering using the thermal expansion of a thermal expansion member such as wax contained in the child valve. The mechanism was complicated.

JP 2012-256823 A Japanese Patent No. 5443644

  Accordingly, an object of the present invention has been made in view of the above-described matters, and it is possible to prevent malfunction and chattering when a valve flowing through a water pipe is opened / closed due to a change in indoor / outdoor temperature or solar heat. To develop and provide a heat-sensitive valve that takes thermal countermeasures against suppression, and that does not require two valves (parent valve / slave valve) as in the past, and that can be suppressed with only one valve. It is in.

Therefore, in order to solve the above-described problems, the present invention provides a heat countermeasure for the heat sensitive valve so that the heat received by the thermal expansion member (1) does not escape to the body main body (10) or the body main body (10). The thermal expansion member (1) is configured not to be affected by heat. The specific means is
1) The washer (4) is made of a material having low thermal conductivity, such as phenol resin, that is, heat insulation.
2) The peripheral portion of the washer (8) is configured to provide a non-contact space with the body body (10).

  According to the present invention, the poppet valve is biased and closed by the push spring, and has an effect of being more strongly closed by applying a pressure of a fluid such as tap water.

  Further, since the poppet valve has a large valve cross-sectional area, it can pass a large volume of water at a stroke when opened. That is, the valve does not become a resistance factor, chattering is less likely to occur, the sound is opened without sound, it is closed cleanly in about 10 seconds, and there is no half-open state.

  Further, according to the present invention, if there is no malfunction and it is used for control of a mist device or a sprinkler, for example, two to five units can be arranged and controlled, and there is an effect that they can be installed at low cost.

It is a front view which shows one Example of this invention. It is a top view which shows one Example of this invention. It is a left view which shows one Example of this invention. It is sectional drawing which shows one Example of this invention. It is a perspective view which shows one Example of this invention.

  The present invention will be described in detail below. The present invention is not limited to the following description, and can be appropriately changed without departing from the gist of the present invention.

  First, an embodiment of the present invention will be described in detail with reference to the drawings. A body main body (10) is provided in the middle of a water pipe (P) having a predetermined diameter, and a thermal expansion member portion is provided on the upper portion of the body main body. (1) is provided, and a poppet valve (11) urged by a push spring (15) is provided in the flow path of the water pipe (P) at the lower portion of the body body, and the thermal expansion member (1) The poppet valve (11) is opened / closed by increasing / decreasing the volume.

  The structure of the heat sensitive valve of the present invention will be described in more detail. The water pipe (P) is provided with a fluid inlet (IN) on one side and an outlet (OUT) on the other side. A body (10) is provided in the middle.

  The body main body (10) is provided with a poppet valve (11) at the lower part, and a heat receiving member (2) such as a heat receiving plate is provided at the upper part of the body main body (10).

  A fluid pipe such as a water pipe (not shown) is connected to one fluid inlet (IN) side of the water pipe (P), and a mist generating device or the like is connected to the other outlet (OUT) side. It is connected to a sprinkler or the like (also not shown).

  Such a heat-sensitive valve propagates heat from the heat receiving member (2) when the temperature rises due to room temperature or outside air temperature, and expands the volume of the thermal expansion member (1) such as wax, whereby the piston (7), The shaft (17) is pressed through the washer (8), and the poppet valve (11) is opened by pressing the holder (13) fixed to the shaft against the pressing spring (15). is there.

  In addition, a non-contact space (X) is formed around the washer (8) with the body body (10), and heat received by the thermal expansion member (1) does not escape to the body body (10). Alternatively, the thermal expansion member (1) is not affected by the heat of the body body (10).

  Further, when the room temperature or the outside air temperature is lowered, the poppet valve (11) is closed by the elastic force of the push spring (15) due to the contraction of the volume of the thermal expansion member (1). It stops cleanly without sound and is forcibly closed after 10 seconds.

  The malfunction means that the valve is kept in a half-open state or reverse operation, and the cause is that the heat of the thermal expansion member (1) escapes to or is received by the valve body.

  The cause of the reverse operation is that the heat of the thermal expansion member (1) escapes or is received by the body body (10).

  The push spring (15) is a plug (14), fixed to the body (10) through an O-ring (16), and fixed firmly.

  In this way, the poppet valve (11) is closed by being biased by the push spring (15), and is more strongly closed by the application of tap water pressure.

  Furthermore, since the poppet valve (11) has a large valve cross-sectional area, a large volume of water is passed at a time when opened. That is, the poppet valve does not become a resistance factor. Therefore, chattering is small and there is no half-open (most unpleasant state).

  In addition, the water pipe in the residential land usually has a diameter of 15A (mm) or more, and the pipe diameter of the water pipe (P) connected to the water pipe is also 20A [3 / 4B (inch)] or less, 15A (1 / 2B) or more is desirable. The pressure in the water pipe is usually about 0.3 to 0.4 MPa. That is, water pipes in residential land usually have a diameter of 15A or more, and chattering does not occur if the pressure is within this range.

  Therefore, the diameter in the above range is provided, 1 / 2B = 15A, 3 / 4B = 20A, the water pipe in the residential land uses a diameter of 15A (mm), and the poppet valve (11) is provided. Therefore, it can be controlled by using room temperature / outside air temperature without requiring a sensor, solenoid valve, power source, etc., and the fluid in the water pipe (P) includes tap water, ground water, alkaline water, acid water, When a fluid selected from electrolyzed water and compressed air flows, these fluids can be managed.

  The water pipe (P), poppet valve (11), push spring (15), etc. are made of non-corrosive materials such as stainless steel, depending on the nature of each fluid. The material is selected and used.

  As described above, in the present invention, water used for watering devices for plants and roofs, and water used for mist generating devices uses tap water, and there are many valves for controlling water, but usually It is possible to obtain a heat-sensitive valve that does not require a sensor, a solenoid valve, and a power source, uses a single valve, and is not limited by the water used, and that does not chatter during operation and stops cleanly.

  By establishing and implementing the technology of the heat sensitive valve of the present invention, it can be utilized industrially.

DESCRIPTION OF SYMBOLS 1 Thermal expansion member 2 Heat receiving member 3 Nut 4 Washer 5 Washer 6 O-ring 7 Piston 8 Washer 9 Stop ring
10 Body
11 Poppet valve
12 Valve seat
13 Holder
14 Plug
15 Push spring
16 O-ring
17 Shaft P Water tube X Non-contact space

Claims (6)

A body body (10) is provided in the middle of the water pipe (P) having a predetermined diameter.
A thermal expansion member (1) is provided on the upper part of the body body,
At the bottom of the body body, a poppet valve (11) urged by a push spring (15) is provided in the flow path of the water pipe (P),
The poppet valve (11) is opened / closed by increasing / decreasing the volume of the thermal expansion member (1).   A recess is formed near the upper portion of the body body (10), and the body body (10) is formed around the washer (8) that abuts the upper end of the shaft (17) fixed to the poppet valve (11) in the recess. The non-contact space part (X) of this was provided, The thermal valve of Claim 1 characterized by the above-mentioned.   The non-contact space portion (X) which is a concave portion is closed at the peripheral portion of the concave portion formed near the upper portion of the body body (10) by using a washer (4) having a heat insulating property. The thermal valve according to 1 or 2.   The thermosensitive valve according to claim 1, wherein the diameter of the water pipe (P) is 10A or more and 20A or less.   The thermosensitive valve according to claim 1 or 4, wherein a fluid selected from tap water, ground water, alkaline water, acidic water, electrolytic water, and compressed air flows in the water pipe (P).   The heat-sensitive valve according to claim 1, wherein the heat expansion member (1) is provided with a heat receiving member (2).

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