JPH081272B2 - Temperature-sensing unpowered automatic valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a temperature sensing non-powered device for preventing a cultivated crop from freezing and frost damage by sensing an environmental temperature and automatically opening a valve to sprinkle water. Regarding automatic valves.

[Conventional technology]

A conventional automatic valve detects changes in temperature, humidity, flow rate, light, etc. with a sensor and electrically controls the signal to drive with a motor or air pressure to open and close the valve body.
For that reason, securing a power supply and a control device was conditioned, and a large amount of cost was required.

In addition, even if a large amount of investment is made and automation by electricity is attempted, the operation is complicated, and electrical knowledge and mechanical knowledge are required to fully use it fully, especially in the case of failure etc. He needed home skills.

By the way, in recent years, in the field of agriculture such as tea cultivation, in order to prevent frost damage, frost sprinkles water on the leaf surface of the tea leaves, covers the sprouts with an ice curtain, and uses the latent heat of freezing of water to freeze. A method to prevent frost damage (sprinkling ice method) is beginning to spread.

This method is becoming widespread as a safer and more reliable frost prevention method than frost prevention by a fan or coating method, but since it is not known when frost will fall, at the time of frost, It was necessary to look around the tea garden all night while predicting the temperature drop based on the intuition and experience of the workers.

Therefore, this method relies on human intuition and experience, and in the case of sudden abnormal weather, it is possible to suffer from frost and frost damage without being able to predict the decrease in temperature, resulting in great damage.

Therefore, in the industry, automation of water sprinkling has been demanded, but in order to automate water sprinkling in this tea garden, a large amount of money is required for the power supply, control device, etc.,
There are various problems such as the fact that most tea gardens are in places where it is difficult to secure a power source, mechanical or electrical knowledge is required for operation, and expert skills are required in the event of a failure. There was.

[Problems to be Solved by the Invention]

Therefore, the present inventor devised a temperature-sensing unpowered automatic valve that does not require a power source in order to solve these drawbacks (Japanese Patent Application No. 91030 of 1983).

The present invention has a drawback of the above temperature-sensing unpowered automatic valve, that is, A) the position of the sensor is automatically fixed and connected, which causes a temperature error with the leaf surface subject to frost damage and watering. The starting temperature may be unstable.

B) When you want to stop water, you can't stop it freely.

C) When the outside air temperature rises, watering may stop regardless of the state of the leaf surface.

It is an object of the present invention to provide a new temperature-sensitive non-powered automatic valve that solves the above problems.

[Means for solving the problem]

In order to achieve the above-mentioned object, the temperature-sensing unpowered automatic valve of the present invention has a water inlet and a water outlet for connecting to a water main, and an upper opening end that is circularly opened at the top. Further, a valve body is formed in which the water inlet, the water outlet and the upper opening end are communicated with each other, and a first chamber opened to the water inlet side is opened upward on the lower part 1 of the valve body in the valve body. A circular valve seat that separates the first chamber and a third chamber opened on the side of the water outlet with a partition wall is provided, and an elastic body in which an upper opening of the circular valve seat can be opened and closed at an upper opening end of the valve body. The upper lid is fixed with the outer periphery of the open / close valve made of the above, and the space formed by the upper lid and the open / close valve is defined as a second chamber, and thus, the first chamber, the second chamber, and the The third chamber is sequentially adjacent to the third chamber, and the second chamber is the first chamber.
The chamber is separated from the third chamber by the open / close valve, and the first chamber and the third chamber, which are separated by the partition wall, communicate with each other when the open / close valve is separated from the circular valve seat. Further, a pilot circuit that opens the first chamber is provided in the valve body, the pilot circuit is connected to the second connection port of the three-way valve through a connection pipe, and the second chamber is provided in the upper lid. An opening connection port is provided, the connection port is connected to a first connection port of the three-way valve via a connection joint, and a third connection port of the three-way valve is connected to a constant temperature operation valve via a connection pipe. The constant temperature actuated valve is configured to open a child valve when the outside air reaches a set temperature, and by switching the valve element in the three-way valve,
When the first connection port and the second connection port of the three-way valve are communicated with each other, the openable valve is closed with respect to the circular valve seat to make the first chamber and the third chamber in a non-communication state, and the three-way valve is connected. When the pressure in the second chamber is released by communicating the first connection port and the third connection port of the valve, the openable valve is opened from the circular valve seat, so that the first chamber and the third chamber are opened. It is characterized by making the communication state.

Further, a connection port in which the third connection port of the three-way valve is connected to the second connection port of another second three-way valve, and the first connection port of the second three-way valve is opened to the third chamber of the valve body A. Connected to the second
The third connection port of the three-way valve is connected to the constant temperature operation valve, the first connection port and the third connection port of the three-way valve are communicated with each other, and the second connection port of the second three-way valve and the third connection port are connected to each other. When the first connection port and the third connection chamber are in communication with each other by releasing the openable valve from the circular valve seat when the first connection port is in communication with the first connection port of the three-way valve. It may be configured such that it is connected to the constant temperature actuated valve when communicating with the port and when the second connection port and the third connection port of the second three-way valve are connected.

[Action]

In the above configuration, when the openable valve 2 is open from the circular valve seat 13, the first chamber a, the second chamber b, and the third chamber c in the valve body A are sequentially adjacent to each other. When the water inlet 11 and the water outlet 12 are connected to the water supply main to circulate the water, the water is circulated from the water inlet 11 through the first chamber a, the second chamber b, and the third chamber c in order, and then the water outlet. Spill from 12.

However, in this device, as shown in FIG. 2, by switching the valve element 41 in the three-way valve 4, the first three-way valve 4
When the connection port 4a and the second connection port 4b are brought into communication with each other, the water flowing into the first chamber a is the pilot circuit 10, the connection pipe 7a, the first connection port 4a of the three-way valve 4, and the second connection port. 4b, the connection joint 6 and the connection port 31 are sequentially circulated to enter the second chamber b, and the pressure Pa of the first chamber a and the pressure Pb of the second chamber b become equal, but the third chamber c
Is pressureless, and since the cross-sectional area of the second chamber b is larger than that of the first chamber a, the openable valve 2 is pressed toward the circular valve seat 13 and closes the upper opening of the circular valve seat 13. The first chamber a and the third
The partition wall 15 and the chamber c are cut off from each other.

Therefore, when water supply is not scheduled, if the three-way valve 4 is switched to the above state, the openable valve 2 will always have the circular valve seat 13
Keep the upper opening of the valve closed and block the flow of water from the water inlet 11 to the water outlet 12 with the open / close valve 2 and the partition wall 15 of the circular valve seat 13 to keep the water supply from the main pipe stopped. You can

In addition, when the water supply is scheduled, the valve body 41 of the three-way valve 4 is set to the first position.
If it is switched so that the connection port 4a and the third connection port 4c communicate with each other, the communication between the second chamber b and the constant temperature operated valve 5 will be established, but the outside air temperature will be below the set temperature of the constant temperature operated valve 5. The child valve 51 remains closed until it falls to
The balance of Pb is not broken, the openable valve 2 is kept closed against the circular valve seat 13, and the water supply from the main pipe is kept stopped.

However, as shown in FIG. 3, when the outside air temperature falls below the set temperature of the constant temperature actuated valve 5, the slave valve 51 of the constant temperature actuated valve 5 opens and the pressure Pb is released from the slave valve 51. It becomes smaller than Pa, the freely openable valve 2 is pushed up from the circular valve seat 13, and the water supply from the main pipe circulates from the first chamber a to the third chamber c to enable water supply.

Therefore, the operator switches the three-way valve 4 between when water is not planned and when water is scheduled, and even when water is planned, the constant temperature actuating valve 5 senses the outside temperature to detect the constant outside temperature. The valve body A is not opened when the temperature is higher than the set temperature of the operating valve 5, and the child valve 51 of the constant temperature operation valve 5 is opened only when the temperature is lower than the set temperature to bring the valve body A into the flow state.

A second three-way valve 9 is provided in addition to the three-way valve 4 configured as described above, and the third connection port 4c of the three-way valve 4 and the connection port 9b of the second three-way valve 9 are provided.
And another connecting port 9a of the second three-way valve 9 is connected to the connecting port 16 opened to the third chamber c of the valve body A, and the other connecting port 9c of the second three-way valve 9 is kept at a constant temperature. It is connected to the operating valve 5. Other configurations are similar to the above configurations.

With such a structure, when watering in the daytime,
As shown in FIG. 4, the first connection port 4a and the third connection port 4c of the three-way valve 4 are communicated with each other, and the second connection port 9b and the first connection port 9a of the second three-way valve 9 are communicated with each other. Third connection port 4c and second of three-way valve 4
By making the second connection port 9b of the three-way valve 9 communicate with each other, the second chamber b and the third chamber c communicate with each other, whereby the pressure Pb of the second chamber b escapes to the third chamber c and Pb = Pa is out of balance, Pb
Becomes smaller than Pa, the open / close valve 2 is pushed up from the circular valve seat 13, and the water supply from the main pipe flows from the first chamber a into the third chamber c to enable water supply.

Further, when the water supply is scheduled, as shown in FIG. 5, the first connection port 4a of the three-way valve 4 and the third connection port 4c are communicated with each other, and the second connection port 9b of the second three-way valve 9 is connected to the third connection port 4c. Connecting the connection port 9c,
Third connection port 4c of the three-way valve 4 and second connection port 9b of the second three-way valve 9
The second chamber b and the constant temperature actuated valve 5 communicate with each other by bringing the constant temperature actuated valve 5 into communication with each other, but when the outside air temperature does not fall below the set temperature of the constant temperature actuated valve 5, a child valve of the constant temperature actuated valve 5 51 is in a closed state and keeps Pa = Pb as described above, whereby the openable valve 2 is pressed against the circular valve seat 13 and the first chamber a and the third chamber c are cut off from the main pipe. Water supply will be stopped.

However, when the outside air temperature falls below the set temperature of the constant temperature actuated valve 5, the slave valve 51 of the constant temperature actuated valve 5 is opened and the pressure Pb of the second chamber b is released. valve seat
It is pushed up from 13, and the water supply from the main pipe can flow from the first chamber a into the third chamber c to be supplied.

Therefore, in the temperature-sensing unpowered automatic valve having such a configuration, since the second second three-way valve 9 is provided in addition to the one three-way valve 4, if the configuration has only one three-way valve 4, Unless the outside air temperature becomes equal to or lower than the set temperature and the slave valve 51 of the constant temperature actuating valve 5 is opened, the valve body A does not enter the circulation state, but by providing the second second three-way valve 9, Even when the outside air temperature does not fall below the set temperature and the sub-valve 51 of the constant temperature operating valve 5 does not open, the valve body A can be brought into a circulating state by operating the three-way valve 4 and the second three-way valve 9.

That is, by providing the three-way valve 4 and the second three-way valve 9,
Water can be supplied manually regardless of whether the constant temperature operating valve 5 is opened or closed.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing a partially sectional assembled device of the present invention.
FIG. 2 is a sectional view showing the device of the present invention in a stopped state.
FIG. 3 is a sectional view showing the automatic watering state of the device of the present invention. FIG. 4 is a cross-sectional view showing a manual watering state of the device of the present invention. FIG. 5 is a sectional view showing an automatic stop state of the apparatus of another embodiment of the present invention. FIG. 6 is a sectional view showing an automatic watering state of the apparatus shown in FIG. FIG. 7 is a sectional view in which the structure of the valve seat of the device shown in FIG. 5 is changed.

As shown in FIG. 1 and FIG. 2, the lower part 1 of the valve body is connected to a main pipe (not shown) by screwing threads 11a and 12a into a water inlet 11 and a water outlet 12. Upper open end
1a is formed, has an opening end 13a slightly lower than the height of the upper open end 1a in a state in which a third chamber c is opened in the vicinity of the center of the upper open end 1a, and the water inlet 11 is A circular valve seat 13 is provided so as to form one chamber a and communicate with each other.

Also, the opening end 13 of the circular valve seat 13 is above the first chamber a.
Pilot circuit 10 is drilled outward at a position away from a.

The upper open end 1a of the lower part 1 of the valve body is held by the upper lid 3 with the valve 2 openable and closed, and the female screw threads 14 provided on the four sides of the lower part 1 of the valve body and the through holes 23 provided on the four sides of the upper lid 3 and the upper lid 3 are provided. Fasten with connecting bolts 32 via female thread 3a provided on all sides,
It constitutes the valve body A.

In the valve body A, the open / close valve 2 is made of an elastic body having a thick central portion, and the lower side of the thick portion 2a is formed with an inward throttle 2b so that the valve is provided above and below the thick portion 2a. Reinforcing plates 21 and 22 are additionally provided so that when the circular valve seat 13 is closed, the throttle 2b comes into contact with the peripheral edge of the opening end 13a of the circular valve seat 13 to establish a sealed state.

The ceiling of the upper lid 3 is provided with a recess that allows the openable valve 2 to move up and down, and the space between the openable valve 2 and the upper lid 3 is defined as a second chamber b.

A connection port 31 is provided on the upper lid 3 of the valve body A, and this connection port 31
Is connected to a first connection port 4a below the three-way valve 4 via a connection joint 6.

The three-way valve 4 has, in addition to the first connection port 4a, a second connection port 4b and a third connection port 4c that are directed to the left and right, and the first connection port 4a has the second connection port 4b or 4c inside. A valve element 41 that can be switched so as to communicate with either one is fitted.

The second connecting port 4b is connected to the pilot circuit 10 by connecting pipes 7a via connecting devices 8 and 8 respectively, and further to the other third connecting port 4c of the three-way valve 4 via connecting devices 8 and 8. Connecting pipe
One or a plurality of constant temperature operating valves 5 are connected by 7b.

This constant temperature actuated valve 5 is provided with a child valve 51 inside, and when the temperature falls below a set temperature, the child valve 51 opens and communicates with the outside.

In addition, in the above configuration, when a plurality of constant temperature operating valves 5 are provided, the certainty of the operation may be ensured by setting all of them to the same operating temperature. May be expected.

When using the temperature-sensing unpowered automatic valve having the above-described configuration, the temperature setting of the constant temperature operating valve 5 is set to, for example, 2 ° C., and the valve body 41 of the three-way valve 4 is connected to the pilot circuit 10 and the second circuit as shown in FIG.
Switch to connect to room b.

During the day when water supply with high outside air temperature is not planned, the sub valve 51 of the constant temperature operating valve 5 remains closed, and the pressure Pa applied to the first chamber a of the main body A connected to the water supply main (the first chamber a Pressure applied to the second chamber b through the pilot circuit 10. Here, if the pressure in the second chamber b is Pb (pressure applied to the second chamber b), Pa = Pb, but the pressure Pc in the third chamber c (pressure applied to the third chamber c) is completely pressureless. Therefore, due to the difference in cross-sectional area between the second chamber b and the third chamber c, the openable valve 2 as the main valve is pressed against the circular valve seat 13 to maintain the closed state. Therefore, the water inlet 11 and the water outlet 12 of the lower part 1 of the valve body are in a non-communication state, and the water supply from the main pipe is kept stopped.

At night when water is to be supplied, the valve element 41 of the three-way valve 4 is switched in advance so that the second chamber b of the valve body A and the constant temperature operating valve 5 communicate with each other as shown in FIG.

However, even when the outside temperature does not drop below the set temperature even at night, the sub valve 51 of the constant temperature operating valve 5 remains closed, so the balance of Pa = Pb is not broken and the open / close valve 2 has a circular valve seat.
It remains closed while being pressed against 13, and the water supply from the mains is still stopped.

Now, when the outside air temperature falls below the set temperature, the slave valve 51 of the constant temperature operating valve 5 opens as shown in FIG. 3, and when the pressure Pb is released from the slave valve 51, Pb becomes smaller than Pa, The open / close valve 2, which is the main valve, is pushed up from the circular valve seat 13 so that the water inlet 11 and the water outlet 12 of the lower portion 1 of the valve body are in communication with each other, and the water supplied from the main pipe is supplied from the first chamber a to the third chamber c. To start watering.

In addition, when stopping the water supply on the way, the valve body 41 of the three-way valve 4
When is switched to be connected to the pilot circuit 10, the operation is stopped by the above.

Next, another embodiment of the present invention will be described.
As shown, the first connecting port 4a and the second connecting port of the three-way valve 4
4b through a connecting pipe 7a and a connecting joint 6 to a pilot circuit
While communicating with 10 and the second chamber b, the other third connection port 4c is connected to the second connection port 9b of the second three-way valve 9 provided separately from the three-way valve 4 via the connection joint 92. A connection port 16 is formed by opening the other connection port 9c of the second three-way valve 9 to the third chamber c of the lower part 1 of the main body.
And the other connection port 9c is connected to one or a plurality of constant temperature actuated valves 5 via the connection pipe 7b. The second three-way valve 9 is provided with a valve body 91 that operates similarly to the above-mentioned three-way valve 4.

Other configurations are similar to the above, but this embodiment is
The constant temperature actuating valve 5 can be manually sprinkled regardless of whether it is opened or closed. When sprinkling water during the daytime, as shown in FIG. 4, the three-way valve 4 and the second three-way valve 9 are connected to the second chamber b and the third chamber b. When only the chamber c is set to communicate, Pb becomes smaller than Pa, the open / close valve 2 as the main valve is pushed up from the circular valve seat 13, and the water inlet 11 and the water outlet 12 of the lower part 1 of the valve body communicate with each other. In this state, the water supply from the main pipe flows from the first chamber a into the third chamber c to start the water supply.

Also, during the day when water is not planned, the set temperature is set to, for example, 2
As shown in Fig. 5, when the outside air temperature does not drop below the set temperature, the slave valve 51 of the constant temperature operating valve 5 is closed. As described above, Pa = Pb is maintained and the main valve is a freely openable valve. Two
Is pressed against the circular valve seat 13 to maintain the closed state. Therefore, the water inlet 11 and the water outlet 12 of the lower part 1 of the valve body are in a non-communication state, and the water supply from the main pipe is stopped.

Further, when the water supply at night is scheduled, the valve body 91 of the second three-way valve 9 is switched so that only the second chamber b and the constant temperature operating valve 5 communicate with each other as shown in FIG. 5, and the outside air temperature is set. When the temperature falls below the temperature, the sub-valve 51 of the constant temperature operating valve 5 is opened, and Pb
Is released, the openable valve 2 is opened, the first chamber a and the third chamber c are in communication with each other, and water is supplied.

In addition, when stopping the water supply on the way, the valve body 41 of the three-way valve 4
It stops when is switched to connect with the pilot circuit 10.

As still another embodiment, as shown in FIG. 7, the above-mentioned valve seat structure is provided with a partition wall 15 'on the water inlet 11 side, and a connection port 16 opened to the third chamber c is guided by a pilot circuit 16'. Will produce similar results. Also, the three-way valve 4 and the second three-way valve 9
May be replaced by two two-way valves, respectively.

〔The invention's effect〕

As described above, according to the temperature-sensing non-powered automatic valve of the present invention, the constant temperature actuated valve can change the temperature as long as the three-way valve is switched between day and night without requiring special technical knowledge. It can detect and automatically open the valve element to start watering, and the sensor of the constant temperature actuated valve can be placed anywhere on the leaf surface, so the watering start temperature is stable, and water spraying can be stopped and started. Can be freely selected at any time, and can be stopped even during sprinkling by operating the three-way valve.

Since it does not require a power source such as a power source, it can be installed anywhere such as a tea plantation where it is difficult to secure a power source, as long as it has water for irrigation in the field, and it is inexpensive and easy to automate watering, and it can control the temperature of the outside air. The change is detected as soon as possible, and watering is started, which has a great effect that it is not necessary to look around at midnight as in the conventional case.

[Brief description of drawings]

FIG. 1 is a perspective view showing a partially sectional assembled device of the present invention. FIG. 2 is a sectional view showing the device of the present invention in a stopped state. FIG. 3 is a sectional view showing the automatic watering state of the device of the present invention. FIG. 4 is a cross-sectional view showing a manual watering state of the device of the present invention. FIG. 5 is a sectional view showing an automatic stop state of the apparatus of another embodiment of the present invention. FIG. 6 is a sectional view showing an automatic watering state of the apparatus shown in FIG. FIG. 7 is a sectional view in which the structure of the valve seat of the device shown in FIG. 5 is changed. A ... valve body, a ... first chamber, b ... second chamber, c ... third chamber, 1
... bottom of valve body, 2 ... open / close valve, 3 ... top lid, 4 ... three-way valve,
4a ... first connection port of three-way valve, 4b ... second connection port of three-way valve, 4c
... Third connection port of three-way valve, 5 ... Constant temperature actuated valve, 6 ... Connection joint, 7a, 7b, 7c ... Connection pipe, 8 ... Connector, 9 ... Second three-way valve, 9a ... Second of three-way valve 1 connection port, 9b ... 2nd connection port of 2nd three-way valve, 9c ... 3rd connection port of 2nd 3 way valve, 10 ... Pilot circuit, 11 ... Inlet port, 12 ... Outlet port, 13 ... Valve seat of body A ,
15, 15 '... Partition wall between first and third chambers, 16 ... Connection port, 21, 22
… Valve reinforcement plate, 23… Bolt through hole, 31… Top cover connection port, 32
... Connection bolt, 41 ... Three-way valve valve body, 51 ... Constant temperature actuated valve child valve, 91 ... Second three-way valve valve body, 92 ... Connection joint.

Claims (2)

[Claims] 1. A water inlet 11 and a water outlet 12 for connecting to a water supply main, and an upper opening end 1a having a circular opening at the top, and these water inlet 11, water outlet 12 and upper opening. A valve body A having an end 1a communicating with each other is formed, and a first chamber a opened on the side of the water inlet 11 is opened upward on the valve body lower part 1 in the valve body A and the first chamber is opened. A circular valve seat 13 that separates a and a third chamber c opened on the side of the water outlet 12 by a partition wall 15 is provided, and the upper opening end 1a of the valve body A can open and close the upper opening of the circular valve seat 13. The upper lid 3 is fixed with the outer periphery of the openable valve 2 made of elastic body sandwiched therebetween, and the space formed by the upper lid 3 and the openable valve 2 is defined as a second chamber b. The first chamber a, the second chamber b, and the third chamber c are sequentially adjacent to each other, and the second chamber b is the open / close valve 2 with respect to the first chamber a and the third chamber c.
Separated by the partition wall 15 and the first partition
The chamber a and the third chamber c communicate with each other when the open / close valve 2 is separated from the circular valve seat 13, and the valve body A is provided with a pilot circuit 10 for opening the first chamber a. , The pilot circuit 10 is connected to the second connection port 4b of the three-way valve 4 via a connection pipe 7a, and the upper lid 3 is provided with a connection port 31 for opening the second chamber b.
Is connected to the first connection port 4a of the three-way valve 4 via a connection joint 6, and the third connection port 4c of the three-way valve 4 is connected to the constant temperature operating valve 5 via a connection pipe 7b. The constant temperature operating valve 5 is configured to open the slave valve 51 when the outside air reaches a set temperature, and by switching the valve body 41 in the three-way valve 4, the first connecting port 4a of the three-way valve 4 and the first connecting port 4a. When the two connection ports 4b are communicated with each other, the open / close valve 2 is closed with respect to the circular valve seat 13 so that the first chamber a and the third chamber c are in a non-communication state, and the three-way valve 4
When the pressure in the second chamber b is released by communicating the first connection port 4a and the third connection port 4c of the open valve 2 with the circular valve seat.
By opening from 13, the first chamber a and the third chamber c
A temperature-sensitive, non-powered automatic valve characterized by putting and in communication with each other. 2. A third connection port 4c of the three-way valve 4 is connected to a second connection port 9b of another second three-way valve 9, and a first connection port 9a of the second three-way valve 9 is connected to the valve body A. Connection opening to the third chamber c
The third connecting port 9c of the second three-way valve 9 is connected to the constant temperature actuating valve 5, and the first connecting port 4a and the third connecting port 4c of the three-way valve 4 are connected to each other. At the same time, when the second connection port 9b and the first connection port 9a of the second three-way valve 9 are communicated with each other, the openable valve 2 is released from the circular valve seat 13 to release the first chamber a and the first chamber a. The three chambers c are communicated with each other, the first connection port 4a and the third connection port 4c of the three-way valve 4 are connected with each other, and the second connection port 9b and the third connection port 9c of the second three-way valve 9 are connected with each other. 2. The temperature-sensing unpowered automatic valve according to claim 1, wherein the temperature-sensing non-powered automatic valve is connected to the constant temperature actuated valve 5 when communicating with each other.