Water supply switching device

Abstract

The utility model discloses a kind of water supply switching devices, including automatic switching valve body, first cavity, second cavity and third cavity are equipped in automatic switching valve body, first cavity and second cavity are mutually separated and each with third cavity is communicated by water hole, first cavity and the water hole of third cavity, the water hole of second cavity and third cavity are all equipped with unpowered one-way switch structure;Automatic switching valve body outside is equipped with drain pipe, with the first inlet pipe of first cavity, with the second inlet pipe of second cavity, with the outlet pipe of third cavity;First inlet pipe is connected with first valve, second inlet pipe is connected with second valve, first cavity is connected with third valve between drain pipe, second cavity is connected with fourth valve between drain pipe.The water supply switching device provided by the utility model is low in energy consumption, control logic is simple, and it is more convenient to maintain.

Description

Technical Field

[0001] This utility model relates to the field of water supply and drainage, and in particular to a water supply switching device. Background Technology

[0002] According to Article 3.2.1 of the "General Code for Building Water Supply and Drainage and Water Conservation" (GB55020-2021), water supply systems should fully utilize the pressure of outdoor pipe networks for direct water supply. Furthermore, according to Article 3.1.2 of the "Design Standard for Building Water Supply and Drainage" (GB50015-2019), water supply pipelines with self-supplied water sources are strictly prohibited from being directly connected to urban water supply pipelines (a mandatory provision). However, in water supply design, municipal water pressure fluctuates, with lower pressure during peak water usage periods and higher pressure during off-peak periods. To ensure the reliability of water supply, building indoor water supply is often designed based on the lowest possible water pressure, resulting in fewer floors receiving direct municipal water supply. For example, in Futian District of Shenzhen, even 7-story residential buildings in the city center can use municipal water supply, while in high-rise commercial and residential buildings, municipal water supply is often only provided to the 2nd or 3rd floor, leading to a significant waste of municipal water pressure.

[0003] In the current environment that advocates energy conservation and emission reduction, there is a need to design new water supply switching devices that have low energy consumption, simple control logic, and are easy to install and replace. Utility Model Content

[0004] The purpose of this invention is to provide a water supply switching device that has low energy consumption, simple control logic, and is easier to maintain.

[0005] To achieve the above objectives, this utility model provides a water supply switching device, including an automatic switching valve body. The automatic switching valve body is provided with a first cavity, a second cavity, and a third cavity. The first cavity and the second cavity are separated from each other and are each connected to the third cavity through a water passage hole. The water passage holes of the first cavity and the third cavity, as well as the water passage holes of the second cavity and the third cavity, are provided with a non-powered one-way switch structure. The automatic switching valve body is provided with a drain pipe, a first water inlet pipe connected to the first cavity, a second water inlet pipe connected to the second cavity, and a water outlet pipe connected to the third cavity. A first valve is connected to the first water inlet pipe, a second valve is connected to the second water inlet pipe, a third valve is connected between the first cavity and the drain pipe, and a fourth valve is connected between the second cavity and the drain pipe.

[0006] As a further improvement of this utility model, the first valve is a first solenoid valve, the second valve is a second solenoid valve, the third valve is a third solenoid valve, and the fourth valve is a fourth solenoid valve.

[0007] As a further improvement of this utility model, the first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve are all electrically connected to the controller; the second water inlet pipe is also connected to an electric contact pressure gauge, which is electrically connected to the controller.

[0008] As a further improvement of this utility model, the powerless one-way switch structure of the water passage between the first cavity and the third cavity includes a first valve disc and a first pin. The size of the first valve disc is larger than the size of the water passage between the first cavity and the third cavity. The first valve disc is located on the side where the third cavity is located. One side of the first valve disc is rotatably connected to the automatic switching valve body through the first pin.

[0009] As a further improvement of this utility model, the powerless one-way switch structure of the water passage between the second cavity and the third cavity includes a second valve disc and a second pin. The size of the second valve disc is larger than the size of the water passage between the second cavity and the third cavity. The second valve disc is located on the side where the third cavity is located. One side of the second valve disc is rotatably connected to the automatic switching valve body through the second pin.

[0010] As a further improvement of this utility model, the automatic switching valve body is also connected to a limiting structure for limiting the maximum opening angle of the first valve disc and the second valve disc to within 90°.

[0011] As a further improvement of this utility model, the limiting structure is a baffle, which corresponds to the side of the first valve disc and the second valve disc facing the third cavity, and the angle between the baffle surface and the plane where the water passage hole is located is less than 90°.

[0012] As a further improvement of this utility model, the first water inlet pipe is supplied with water by a water pump or a self-supplied water source, the second water inlet pipe is supplied with municipal water, and the water outlet pipe supplies water to users.

[0013] As a further improvement of this utility model, both the first cavity and the second cavity are provided with viewing windows on their walls.

[0014] Beneficial effects Compared with the prior art, the advantages of the water supply switching device of this utility model are: 1. Because the automatic switching valve body uses two non-powered one-way switches, the opening and closing of these switches is controlled solely by the water flow direction, eliminating the need for a controller like other solenoid valves. This results in a simpler structure, lower cost, and simplified control logic for the entire water supply switching device, leading to greater energy efficiency and reliability. Furthermore, the air gap created in the water supply pipeline prevents backflow contamination.

[0015] 2. By controlling the opening and closing of each solenoid valve through the controller, the water supply switching device can automatically switch the water supply source, reducing the risk of human error. 3. The non-powered one-way switch structure uses a valve disc that can rotate relative to the water passage hole, which is low in cost, easy to maintain, and convenient to replace if damaged later.

[0016] 4. The automatic switching valve body is also connected to a limiting structure to limit the maximum opening angle of the first valve disc and the second valve disc to within 90°. When the water flows from the third chamber to the first chamber or the second chamber, it prevents the water passage from failing to close properly due to the valve disc flipping to the side away from the water passage, thus ensuring that the valve disc can work normally.

[0017] The present invention will become clearer from the following description and in conjunction with the accompanying drawings, which are used to explain the embodiments of the present invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural diagram of the water supply switching device in Example 1; Figure 2 For control flowchart; Figure 3 This is one of the schematic diagrams of water flow in the water supply switching device of Example 1; Figure 4 This is the second schematic diagram of water flow in the water supply switching device of Example 1; Figure 5 This is a partial enlarged view of the valve disc and limiting structure in Example 1; Figure 6 This is one of the enlarged views of the unpowered unidirectional switch structure in Example 2; Figure 7 This is the second enlarged view of the unpowered unidirectional switch structure in Example 2. Detailed Implementation

[0020] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0021] Example 1 The specific embodiments of this utility model are as follows: Figures 1 to 5As shown, a water supply switching device includes an automatic switching valve body 1. The automatic switching valve body 1 has a first chamber 21, a second chamber 22, and a third chamber 23. The first chamber 21 and the second chamber 22 are separated from each other and each communicates with the third chamber 23 through a water passage. A non-powered one-way switch structure is provided at the water passages of the first chamber 21 and the third chamber 23, as well as at the water passages of the second chamber 22 and the third chamber 23. Externally, the automatic switching valve body 1 has a drain pipe 4, a first inlet pipe 2 communicating with the first chamber 21, a second inlet pipe 3 communicating with the second chamber 22, and an outlet pipe 5 communicating with the third chamber 23. A first valve is connected to the first inlet pipe 2, a second valve is connected to the second inlet pipe 3, a third valve is connected between the first chamber 21 and the drain pipe 4, and a fourth valve is connected between the second chamber 22 and the drain pipe 4.

[0022] The first inlet pipe 2 supplies water from a water pump or a self-supplied water source, the second inlet pipe 3 supplies water from the municipal water supply, and the outlet pipe 5 supplies water to users.

[0023] The first valve is the first solenoid valve 11, the second valve is the second solenoid valve 12, the third valve is the third solenoid valve 13, and the fourth valve is the fourth solenoid valve 14.

[0024] The first solenoid valve 11, the second solenoid valve 12, the third solenoid valve 13, and the fourth solenoid valve 14 are all electrically connected to the controller 7. The controller 7 is a Honeywell WEB-600. The second water inlet pipe 3 is also connected to an electrical contact pressure gauge 6, which is electrically connected to the controller 7. The electrical contact pressure gauge 6 is used to monitor the water pressure in the second water inlet pipe 3; a standard type of electrical contact pressure gauge is sufficient for this purpose.

[0025] The non-powered one-way switch structure for the water passage between the first chamber 21 and the third chamber 23 includes a first valve disc 33 and a first pin 31. The size of the first valve disc 33 is larger than the size of the water passage between the first chamber 21 and the third chamber 23, and the first valve disc 33 can completely block the water passage, thus closing it. The first valve disc 33 is located on the side of the third chamber 23, and one side of the first valve disc 33 is rotatably connected to the automatic switching valve body 1 via the first pin 31. For ease of maintenance, an inspection port is provided on the side wall of the third chamber 23, and an inspection door 20 is movably connected to the inspection port. During the use of the water supply switching device, the inspection door 20 is in a sealed closed state, and the inspection door 20 is bolted to the outer wall of the third chamber 23; when a blockage occurs in the third chamber 23 or the valve disc needs to be replaced, the inspection door 20 can be opened for maintenance.

[0026] The non-powered one-way switch structure for the water passage between the second cavity 22 and the third cavity 23 includes a second valve disc 34 and a second pin 32. The size of the second valve disc 34 is larger than the size of the water passage between the second cavity 22 and the third cavity 23, and the second valve disc 34 can completely block the water passage, thus closing it. The second valve disc 34 is located on the side where the third cavity 23 is located, and one side of the second valve disc 34 is rotatably connected to the automatic switching valve body 1 via the second pin 32. To improve the sealing performance of the first valve disc 33 and the second valve disc 34 when closed, a sealing ring 8 is provided on the edge of the water passage facing the valve disc. When the valve disc is closed, it can press against the sealing ring 8 to achieve a seal. Figure 5 As shown.

[0027] The automatic switching valve body 1 is also connected to a limiting structure 30 for limiting the maximum opening angle of the first valve disc 33 and the second valve disc 34 to within 90°.

[0028] like Figure 5 As shown, the limiting structure 30 is a baffle, which corresponds to the side of the first valve disc 33 and the second valve disc 34 facing the third cavity 23. The angle between the surface of the baffle and the plane where the water passage hole is located is less than 90°. In this embodiment, the angle between the surface of the baffle and the plane where the water passage hole is located is 70°.

[0029] In addition, both the first cavity 21 and the second cavity 22 are provided with viewing windows 35 on their walls, which makes it convenient for personnel to check the water level in the first cavity and the second cavity.

[0030] Working principle as follows Figure 3 and Figure 4 As shown (Note: the water-filled parts of the pipe are shaded, the air-filled parts are unfilled), the control flow of its controller is as follows: Figure 2 As shown: The electric contact pressure gauge 6 is used to monitor the water pressure of the second inlet pipe 3, which is connected to the municipal water supply pipe. Under normal circumstances, the water pressure is sufficient, the second solenoid valve 12 of the second inlet pipe 3 is open, and the first solenoid valve 11 of the first inlet pipe 2 is closed. The water pressure in the second inlet pipe 3 causes the second pin 32 to guide the second valve disc 34 to open and the first pin 31 to guide the first valve disc 33 to close. The outlet pipe 5 is supplied with municipal water. At this time, the third solenoid valve 13 on the drain pipe 4 is open and the fourth solenoid valve 14 is closed, and the water in the first chamber 21 is drained through the drain pipe 4. In this state, water is supplied by the second inlet pipe 3, and the water in the first chamber 21 is drained, forming an air barrier and preventing backflow contamination. Figure 3 As shown.

[0031] When the municipal water supply pressure is lower than the set pressure value (e.g., 0.15MPa), the water pressure is insufficient, and the water supply needs to be switched from the second inlet pipe 3 to the first inlet pipe 2. The electric contact pressure gauge 6 sends a low-pressure signal to the controller 7. The controller 7 closes the second solenoid valve 12 on the second inlet pipe 3 and simultaneously opens the first solenoid valve 11 on the first inlet pipe 2. The third solenoid valve 13 on the drain pipe 4 closes while the fourth solenoid valve 14 opens. The water pressure in the first inlet pipe 2 causes the first pin 31 to guide the first valve disc 33 to open and the second pin 32 to guide the second valve disc 34 to close. After a series of actions, the water supply is switched from the second inlet pipe 3 to the first inlet pipe 2. The water in the second chamber 22 is emptied, forming an air barrier and preventing backflow contamination. This stage is as follows: Figure 4 As shown.

[0032] When the municipal water pressure increases, and the pressure gauge 6 detects that the water pressure in inlet pipe 3 is higher than the set pressure value (e.g., 0.18 MPa), it indicates sufficient water pressure, and the water supply needs to be switched from the first inlet pipe 2 to the second inlet pipe 3. The pressure gauge 6 sends a signal indicating sufficient pressure to the controller 7. The controller 7 closes the first solenoid valve 11 on the first inlet pipe 2 and simultaneously opens the second solenoid valve 12 on the second inlet pipe 3. The fourth solenoid valve 14 on the drain pipe 4 closes while the third solenoid valve 13 opens. After this series of actions, the water supply is switched from the first inlet pipe 2 to the second inlet pipe 3. The water in the first chamber 21 is emptied, forming an air barrier and preventing backflow contamination. This stage is as follows: Figure 3 As shown.

[0033] Example 2 like Figures 6 to 7 As shown, the difference from Embodiment 1 is that, in addition to using a valve disc, the non-powered one-way switch structure can also adopt the following structure: Taking the water passage between the first cavity 21 and the third cavity 23 as an example, a first conical shell 91 and a second conical shell 92 are connected to the water passage. The first conical shell 91 is located on the side where the first cavity 21 is located, and its smaller cross-section end is away from the third cavity 23. The smaller cross-section end of the first conical shell 91 is provided with a first water passage 93. The second conical shell 92 is located on the side where the third cavity 23 is located, and its smaller cross-section end is away from the first cavity 21. Several second water passages 94 are provided on the side wall of the second conical shell 92. The first conical shell 91 and the second conical shell 92 together form a cavity for accommodating a sphere 95, which is movable within the cavity.

[0034] like Figure 6 As shown, when water flows from the third cavity 23 to the first cavity 21 (corresponding to...) Figure 3 (In the state where water is supplied by the second inlet pipe 3), the sphere 95 blocks the first outlet 93 under water pressure, preventing water flow. For example... Figure 7As shown, when water flows from the first cavity 21 to the third cavity 23 (corresponding to...) Figure 4 (In the state where water is supplied by the first water inlet pipe 2), the sphere 95 moves towards the top of the second conical shell 92 under the action of water flow, but does not block each of the second water outlets 94. At this time, the first water outlet 93 is also opened, so the water in the first cavity 21 can smoothly enter the third cavity 23.

[0035] The present invention has been described above in conjunction with the preferred embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations made in accordance with the essence of the present invention.

Claims

1. A water supply switching device, characterized in that, Includes an automatic switching valve body (1), which has a first chamber (21), a second chamber (22), and a third chamber (23). The first chamber (21) and the second chamber (22) are separated from each other and are connected to the third chamber (23) through water passage holes. The water passage holes of the first chamber (21) and the third chamber (23), as well as the water passage holes of the second chamber (22) and the third chamber (23), are all equipped with a non-powered one-way switch structure. The exterior is provided with a drain pipe (4), a first inlet pipe (2) connected to the first cavity (21), a second inlet pipe (3) connected to the second cavity (22), and an outlet pipe (5) connected to the third cavity (23); a first valve is connected to the first inlet pipe (2), a second valve is connected to the second inlet pipe (3), a third valve is connected between the first cavity (21) and the drain pipe (4), and a fourth valve is connected between the second cavity (22) and the drain pipe (4).

2. The water supply switching device according to claim 1, characterized in that, The first valve is a first solenoid valve (11), the second valve is a second solenoid valve (12), the third valve is a third solenoid valve (13), and the fourth valve is a fourth solenoid valve (14).

3. A water supply switching device according to claim 2, characterized in that, The first solenoid valve (11), the second solenoid valve (12), the third solenoid valve (13), and the fourth solenoid valve (14) are all electrically connected to the controller (7); the second water inlet pipe (3) is also connected to an electric contact pressure gauge (6), which is electrically connected to the controller (7).

4. The water supply switching device according to claim 1, characterized in that, The non-powered one-way switch structure of the water passage between the first cavity (21) and the third cavity (23) includes a first valve disc (33) and a first pin (31). The size of the first valve disc (33) is larger than the size of the water passage between the first cavity (21) and the third cavity (23). The first valve disc (33) is located on the side where the third cavity (23) is located. The first valve disc (33) is rotatably connected to the automatic switching valve body (1) through the first pin (31).

5. A water supply switching device according to claim 4, characterized in that, The non-powered one-way switch structure of the water passage between the second cavity (22) and the third cavity (23) includes a second valve disc (34) and a second pin (32). The size of the second valve disc (34) is larger than the size of the water passage between the second cavity (22) and the third cavity (23). The second valve disc (34) is located on the side where the third cavity (23) is located. The second valve disc (34) is rotatably connected to the automatic switching valve body (1) through the second pin (32).

6. A water supply switching device according to claim 5, characterized in that, The automatic switching valve body (1) is also connected to a limiting structure (30) for limiting the maximum opening angle of the first valve disc (33) and the second valve disc (34) to within 90°.

7. A water supply switching device according to claim 6, characterized in that, The limiting structure (30) is a baffle. The baffle and the first valve disc (33) and the second valve disc (34) are opposite to each other on the side facing the third cavity (23). The angle between the baffle surface and the plane where the water passage hole is located is less than 90°.

8. A water supply switching device according to claim 1, characterized in that, The first inlet pipe (2) is supplied with water by a water pump or a self-supplied water source, the second inlet pipe (3) is supplied with municipal water, and the outlet pipe (5) supplies water to users.

9. A water supply switching device according to claim 1, characterized in that, Both the first cavity (21) and the second cavity (22) have a viewing window (35) on their walls.

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