CN201476375U - Solar water heater exhaust valve - Google Patents

Abstract

The utility model relates to an exhaust valve of a solar water heater. It includes an outer pipe for installation on a solar water heater water tank, and is characterized in that: an inner pipe is arranged in the inner cavity of the outer pipe, the outer diameter of the inner pipe is smaller than the inner diameter of the outer pipe, and the outer wall of the inner pipe and the inner wall of the outer pipe Connected by a connecting plate, a middle pipe is plugged into the inner pipe through an interference fit, the lower end of the middle pipe is inserted into the inner pipe, and an end cap is arranged at the lower end of the middle pipe, and a connecting hole is arranged in the center of the end cap. There are air leakage holes around the connecting hole, and there is a disc-shaped middle tube cover. The center of the middle tube cover is provided with a connecting rod, which is inserted into the connecting hole in the center of the end cover; on the outer wall of the upper end of the middle tube A soft skirt is fixedly arranged on the top, and the soft skirt is in the shape of a ring, the inner edge of the soft skirt is fixedly connected with the outer wall of the middle tube, and the outer edge of the soft skirt covers the upper opening of the outer tube. The exhaust valve of the solar water heater separates the air intake passage and the exhaust passage, has a compact structure, and well solves the problem of freezing of the exhaust valve in winter on the basis of not affecting the original installation structure.

Description

Solar water heater exhaust valve

technical field

The utility model relates to an exhaust valve of a solar water heater.

Background technique

The water tank of the solar water heater often needs water intake and drainage. In order to make the water intake and drainage smooth, it is necessary to install an exhaust valve on the water tank to balance the pressure inside and outside the water tank. The ordinary exhaust valve is a pipe, which serves the purpose of communicating inside and outside the water tank. Although this kind of exhaust valve has a simple structure, because the inlet and outlet are the same channel, and the humidity in the water tank is relatively high, the inlet and exhaust channels are easy to be blocked by freezing in cold winter. Then cause the upper and lower water to be unsmooth, and the pressure difference inside and outside the water tank is too large, and the atmospheric pressure will flatten the water tank.

Contents of the invention

The purpose of the utility model is to provide a solar water heater exhaust valve with simple structure and not easy to freeze.

In order to achieve the above object, the utility model adopts the following technical solutions:

The exhaust valve of the solar water heater according to the utility model includes an outer pipe for installation on the water tank of the solar water heater, and is characterized in that: an inner pipe is arranged in the inner cavity of the outer pipe, and the outer diameter of the inner pipe is smaller than the inner diameter of the outer pipe. The outer wall of the inner pipe and the inner wall of the outer pipe are connected by a connecting plate, and a middle pipe is plugged into the inner pipe through an interference fit, and the lower end of the middle pipe is inserted into the inner pipe, and an end cap is arranged at the lower end of the middle pipe, The center of the end cover is provided with a connecting hole, and the surroundings of the connecting hole are provided with air leakage holes, and there is also a disc-shaped middle tube cover, and the center of the middle tube cover is provided with a connecting rod, which is inserted into the center of the end cover. In the connection hole of the middle tube; a soft skirt is fixedly arranged on the outer wall of the upper end of the middle tube, the soft skirt is in the shape of a ring, the inner edge of the soft skirt is fixedly connected with the outer wall of the middle tube, and the outer edge of the soft skirt covers at the upper opening of the outer tube.

A rainproof cap is arranged at the upper end opening of the middle pipe.

After adopting the above technical solution, the exhaust valve of the solar water heater separates the air intake passage and the exhaust passage, has a compact structure, and solves the problem of freezing of the exhaust valve in winter without affecting the original installation structure.

Description of drawings

Accompanying drawing is the structural representation of an embodiment of the utility model.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described.

The exhaust valve of the solar water heater according to the utility model includes an outer pipe 1 for being installed on the water tank of the solar water heater. The outer pipe 1 is a circular tubular structure, and several steps can be arranged on the outer wall for installation and firm connection. An inner tube 3 is arranged in the inner cavity of the outer tube 1, the outer diameter of the inner tube 3 is smaller than the inner diameter of the outer tube 1, and the outer wall of the inner tube 3 is connected with the inner wall of the outer tube 1 by a connecting plate 2, so that the inner tube An interlayer channel is formed between the outer wall of 3 and the inner wall of the outer tube 1 . In the inner pipe 3, a middle pipe 4 is inserted through interference fit, the lower end of the middle pipe 4 is inserted in the inner pipe 3, and an end cap is arranged at the lower end of the middle pipe 4, and a connecting hole is arranged at the center of the end cap, There is an air leakage hole 5 around the connecting hole, and a disc-shaped middle tube cover 6, and the center of the middle tube cover 6 is provided with a connecting rod 7, and the connecting rod 7 is inserted into the connecting hole at the center of the end cap; The outer wall of the upper end of the middle tube 4 is fixedly provided with a soft skirt 8, the soft skirt 8 is annular, the inner edge of the soft skirt 8 is fixedly connected with the outer wall of the middle tube 4, and the outer edge of the soft skirt 8 covers At the upper opening of the outer tube 1. The above-mentioned middle tube cover 6 and soft skirt 8 are all made of soft, elastic silicone rubber and other materials. Or close the channel.

In addition, in order to prevent the influence of rainwater, a rainproof cap 9 is provided at the opening of the upper end of the middle pipe 4 . But the setting of rainproof cap 9 is based on the principle of not affecting the ventilation of middle pipe 4. For example, the upper end opening of middle pipe 4 can be provided with a flanging with air hole as shown in the accompanying drawing, and the spherical rainproof cap 9 buckle on the hem. Of course, it is also possible to buckle the rainproof cap 9 directly on the upper opening of the middle pipe 4, and then set an air vent on the side wall at the upper end of the middle pipe 4 which is slightly close to the opening.

During use, the exhaust valve of the solar water heater is installed on the upper end of the water tank, so that the outer pipe 1 runs through the side wall of the water tank, the lower end of the outer pipe 1 is located in the water tank, and the upper end of the outer pipe 1 is located outside the water tank. When the solar energy is used to fill the water, the pressure in the water tank increases, and the gas enters through the lower end of the outer tube 1. At this time, because the middle tube cover 6 covers the lower end of the middle tube 4, the gas cannot be discharged through the middle tube 4, but can only pass through. The gap between the outer wall of the inner pipe 3 and the inner wall of the outer pipe 1 rises, and when it reaches the upper end of the outer pipe 1, the air pressure pushes the soft skirt 8 away, and the gas can be discharged smoothly, keeping the pressure inside and outside the water tank consistent during the water filling process ; when the solar energy is launched, the pressure in the water tank is reduced, and now the soft skirt 8 covers the upper opening of the outer tube 1 under the action of gravity and elasticity, and the outer wall of the inner tube 3 and the inner wall of the outer tube 1 The channel is closed, and at the same time, the outside air enters the inner cavity of the middle pipe 4 through the upper opening of the middle pipe 4, and when it reaches the lower end of the middle pipe 4, the middle pipe covering it is pushed away through the air leakage hole 5 on the end cover. Cover 6 enters the inside of the water tank to achieve the purpose of balancing the internal and external pressures of the water tank.

Claims (2)

1. Solar water heater exhaust valve, including an outer pipe (1) for installation on the solar water heater tank, characterized in that: an inner pipe (3) is arranged in the inner cavity of the outer pipe (1), and the inner pipe (3) The outer diameter of the outer tube (1) is smaller than the inner diameter of the outer tube (1), and the outer wall of the inner tube (3) is connected with the inner wall of the outer tube (1) through a connecting plate (2), and the inner tube (3) is inserted through an interference fit. In the middle pipe (4), the lower end of the middle pipe (4) is plugged in the inner pipe (3), and an end cap is set at the lower end of the middle pipe (4), the center of the end cap is provided with a connecting hole, the connecting hole There are air leakage holes (5) around it, and a disc-shaped middle tube cover (6). The center of the middle tube cover (6) is provided with a connecting rod (7), and the connecting rod (7) is plugged into the end cover In the connection hole of the center; on the outer wall of the middle pipe (4) upper end, a soft skirt (8) is fixedly arranged, and the soft skirt (8) is annular, and the inner edge of the soft skirt (8) is in contact with the middle The outer wall of the pipe (4) is fixedly connected, and the outer edge of the soft skirt (8) covers the upper opening of the outer pipe (1). 2. The solar water heater exhaust valve according to claim 1, characterized in that: a rainproof cap (9) is provided at the upper opening of the middle pipe (4).

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