CN2636026Y - Water supply valve capable of automatically cutting off for solar energy water heater - Google Patents

Abstract

The water supply valve of the solar water heater of the utility model that can be closed automatically is composed of a valve body [1] and a hydraulic device. Composition, the piston is located in the hydraulic cylinder, the liquid inlet [4] on the hydraulic cylinder is connected with the water return pipe of the water heater, and the transmission mechanism that can push the handle to close the valve is connected on the piston. Because the pressure generated by the overflow of the return pipe is used to close the water valve, the water supply valve can be automatically closed after the water tank is full of water, without manual closing of the water valve, and the structure is simple, difficult to break down, easy to maintain, and low in manufacturing cost.

Description

Solar water heater can automatically close the water supply valve

Technical Field The utility model relates to a water supply valve for solar water heaters.

Background technology At present, the use of solar water heaters has been relatively popular. Solar water heaters are usually installed on the roof and connected indoors to the water heater through the upper and lower water pipes. Since the water supply needs to be operated and controlled indoors, how to close the water supply valve in time after the water supply is completed has become a problem that users are more concerned about. Some water heater tanks are equipped with a return pipe leading to the room, that is, when the water heater is filled with water and the water tank is full, water overflows from the return pipe to remind the user to close the water valve. Its advantages are simple structure and low cost. Yes: Due to various reasons, people often fail to close the water valve in time, causing water to flood Jinshan, which not only brings inconvenience and loss to users, but also causes a lot of waste of water resources. Some water heaters are equipped with a small water tank, and a floating ball valve is installed on the small water tank to control the water supply, but the following problems are found in use: First, the solar floating ball valve and the water supply pipe must bear the pressure of tap water, which is prone to failure, and Maintenance is extremely inconvenient; the 2nd, this device cost is higher and is unfavorable for heat preservation; 3rd, when using water heater in winter, the water inlet valve must be closed earlier, otherwise the more you use it, the colder it will be. Also have water heater to adopt automatic control devices such as water pressure sensor and solenoid valve, but this device cost is very high, and maintenance is extremely inconvenient.

Summary of the invention In order to solve the above-mentioned problems of solar water heater water supply, the utility model provides a water supply valve that can be automatically closed, which not only can automatically close the water supply valve after the water tank is filled with water, but also has a simple structure and low cost.

The water supply valve of the solar water heater of the utility model that can be automatically closed is composed of a valve body and a hydraulic device. The valve body is equipped with a handle for opening and closing the valve. The hydraulic device is composed of a hydraulic cylinder and a piston. The liquid inlet is connected with the water return pipe of the water heater, and the piston is connected with a transmission mechanism that can push the handle to close the valve.

The transmission mechanism is a piston rod fixedly connected with the piston or a connecting rod whose two ends are respectively hinged with the piston and the handle. When filling water, open the water valve, and the handle pushes the piston up through the piston rod or connecting rod; when the water heater tank is full, the water in the tank overflows into the hydraulic cylinder through the return pipe, and as the overflow increases, the hydraulic cylinder The water pressure inside increases, thereby pushing the piston to move down, and pushes the handle to rotate through the piston rod or connecting rod, and closes the water valve.

In order to discharge the gas in the hydraulic cylinder in time, a water column is formed in the hydraulic cylinder and the return pipe to generate water pressure, and an exhaust hole is opened on the hydraulic cylinder.

Because the utility model uses the pressure generated by the overflow of the return pipe to close the water valve, the water supply valve can be automatically closed after the water tank is filled with water, without manual closing of the water valve, and the structure is simple, not easy to break down, easy to maintain, and low in manufacturing cost .

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic structural diagram of the utility model.

DETAILED DESCRIPTION As shown in Figure 1, the water supply valve of the solar water heater of the utility model that can be automatically closed is composed of a valve body [1] and a hydraulic device. The valve body [1] is equipped with a handle [2] for opening and closing the valve. The device consists of a hydraulic cylinder [7] and a piston [3]. The hydraulic cylinder [7] is fixed above the valve body [1]. The piston is located inside the hydraulic cylinder. Connected, the top of the hydraulic cylinder has a vent hole [6], and a screw [5] is housed in the hole, and the screw has an inclined plane to adjust the size of the vent hole, and the screw can be turned to adjust the size of the vent hole through the inclined plane. The piston [3] is connected to the handle [2] through a connecting rod [8], and the two ends of the connecting rod [8] are respectively hinged with the piston [3] and the handle [2] through a pin shaft [9]. When filling the water, turn the handle upward from the dotted line in the figure to open the water valve, and the handle pushes the piston up through the connecting rod; when the water heater tank is full, the water in the tank overflows into the hydraulic cylinder through the return pipe, and the return pipe and hydraulic pressure The air in the cylinder is discharged from the exhaust hole. As the overflow increases, due to the small exhaust hole, a water column is formed in the hydraulic cylinder and the return pipe, and the water pressure in the hydraulic cylinder increases, thereby pushing the piston down. And push the handle to rotate through the connecting rod, close the water valve, and the water in the return pipe and the hydraulic cylinder will flow out slowly through the vent hole and the gap between the pistons, and the above operations can be repeated.

The utility model piston [3] also can push the handle down by the piston rod that is connected with the piston and move down to close the water valve.

Claims (5)

1. A water supply valve for solar water heaters that can be automatically closed. The valve body [1] is equipped with a handle [2] for the opening and closing valve. It is characterized in that a hydraulic device is fixed on one side of the valve body [1], and the hydraulic device is composed of a hydraulic cylinder. [7], piston [3] is formed, and piston is positioned at hydraulic cylinder, and the liquid inlet [4] of hydraulic cylinder communicates with water heater return pipe, is connected with the transmission mechanism that can push handle [2] to close valve on piston [3]. 2. The water filling valve according to claim 1, characterized in that the transmission mechanism is a piston rod fixedly connected with the piston. 3. The water filling valve according to claim 1, characterized in that the transmission mechanism is a connecting rod [8], and the two ends of the connecting rod [8] are respectively hinged to the piston [3] and the handle [2]. 4. The water filling valve according to claim 1, 2 or 3, characterized in that an exhaust hole [6] is opened on the hydraulic cylinder. 5. The water filling valve according to claim 4, characterized in that an adjusting device for adjusting the size of the air hole is installed on the air vent [6].

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