Anti-backflow water circulation control system

Abstract

The utility model provides an anti-backflow water circulation control system which comprises a backflow pipeline, a water tank and an electric box, and an electromagnetic valve is arranged on the backflow pipeline. The electromagnetic valve is electrically connected with the electric box, and a switch of the electromagnetic valve is controlled by the electric box; the backflow pipeline guides water to flow back into the water tank in the water circulation control system. According to the utility model, the closing of the electromagnetic valve is controlled by the electric box so as to prevent water in the backflow pipeline from continuously flowing back into the water tank, and the problem that high-level water still possibly flows back into the water tank and overflows after the water pump stops working in a conventional water circulation system is solved.

Description

A water circulation control system to prevent backflow Technical Field

[0001] This utility model relates to the field of water circulation control system technology, and in particular to a water circulation control system for preventing backflow. Background Technology

[0002] Water recycling systems are widely used in daily life and industrial production. Water is often used as a carrier of energy. Its advantage is that a certain amount of water can be reused continuously in specific operating systems, which can reduce the waste of water resources in daily life or industrial production.

[0003] A water recycling system typically includes a water pump, a water tank, and other production equipment. The water pump draws water from the tank and supplies it to the other production equipment. After passing through the other production equipment, the water flows back to the tank, thus forming a water resource recycling system. Normally, the water tank is positioned lower than the other production equipment, allowing the water to flow back to the tank due to gravity. Utilizing gravity effectively during the water return process reduces the power or manpower required for the water recycling system.

[0004] However, when the water pump stops working, the water in other production equipment still flows back to the water tank due to gravity, which may cause water to overflow from the water tank. This will lead to two problems: firstly, water resources are wasted; secondly, the water volume of the entire water circulation system is reduced, which may cause the water circulation system to malfunction. Summary of the Invention

[0005] This utility model discloses a water circulation control system to prevent backflow, which can solve the problem that in a water circulation system, even after the water pump stops working, high-level water may still backflow into the water tank and overflow.

[0006] A water circulation control system for preventing backflow includes a return pipe, a water tank and an electrical box, wherein a solenoid valve is installed on the return pipe;

[0007] The solenoid valve is electrically connected to the electrical box, and the switching of the solenoid valve is controlled by the electrical box.

[0008] The return pipe guides the water back to the water tank in the water circulation control system.

[0009] Preferably, it also includes a hot water unit, process equipment, and a hot water pump;

[0010] The hot water pump draws water from the water tank and flows through the process equipment and the hot water unit in sequence. After being heated by the hot water unit, the water flows back to the water tank through the return pipe.

[0011] The hot water pump is electrically connected to the electrical box. The electrical box receives the start and stop signals of the hot water pump and controls the opening and closing of the solenoid valve according to the start and stop signals of the hot water pump.

[0012] Preferably, the process equipment and the hot water pump are interconnected via a hot water pipe;

[0013] The hot water unit is electrically connected to the electrical box;

[0014] A flow switch is installed on the hot water pipe and is electrically connected to the electrical box. It is used to detect the water flow signal in the hot water pipe and feed the detection signal back to the electrical box.

[0015] A temperature sensor is installed inside the water tank and is electrically connected to the electrical box to detect the water temperature inside the water tank and feed the detection signal back to the electrical box.

[0016] Preferably, a first manual switch is provided on the hot water pipe, and the first manual switch is in the normally open state.

[0017] Preferably, the return pipe is also provided with two second manual switches, which are located at both ends of the solenoid valve respectively, and the second manual switches are in the normally open state;

[0018] A maintenance pipe is also provided between the hot water unit and the water tank, and is connected in parallel with the return pipe. A third manual switch is provided on the maintenance pipe, and the third manual switch is normally closed.

[0019] Preferably, the hot water unit and the process equipment are interconnected by a cold water pipe, and a fourth manual switch is installed on the cold water pipe, which is normally open.

[0020] Preferably, the water tank is equipped with an automatic control switch device, the return pipe is connected to the automatic control switch device, and the automatic control switch device automatically changes the switch state according to the water level.

[0021] Preferably, the self-controlled switch device includes a fixing member and a toothed plate slidably mounted on the fixing member;

[0022] The top of the water tank is provided with a water inlet pipe, the top of the fixing member is connected to the return pipe, the bottom of the fixing member is connected to the inside of the water tank through the water inlet pipe, and the positions of the water inlet pipe and the return pipe are corresponding.

[0023] The fixing component has a sliding groove with a rectangular vertical cross section. The return pipe and the inlet pipe are both connected to the sliding groove. A rectangular slider is installed in the sliding groove. When the rectangular slider is moved, the rectangular slider completely covers or offsets the port of the return pipe. One end of the rectangular slider is rotatably connected to a screw. A gear is threaded onto the screw, and the gear meshes with the gear plate.

[0024] The lower end of the toothed plate is connected to a sliding rod, which is slidably mounted on the water tank. A float is installed at the lower end of the sliding rod.

[0025] Preferably, a limiting block is provided at the end of the screw away from the rectangular slider, and the outer diameter of the limiting block is larger than the outer diameter of the screw.

[0026] Preferably, one end of the fixing member is provided with a toothed groove and a gear groove, both of which penetrate the upper and lower surfaces of the fixing member;

[0027] The toothed plate groove is used to slide the toothed plate, and the toothed plate moves vertically within the toothed plate groove.

[0028] The gear slot is used for rotatably mounting the gear.

[0029] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0030] 1. By controlling the closing of the solenoid valve through the electrical box, the water in the return pipe is prevented from continuing to flow back into the water tank. This solves the problem that in conventional water circulation systems, high-level water may still backflow into the water tank and overflow after the water pump stops working.

[0031] 2. In the automatic control switch device, the float rises or falls with the water level in the tank, thereby driving the toothed plate to rise or fall. This, in turn, drives the rectangular slider to move in the sliding groove through gears and screws. During the movement, the rectangular slider completely covers or offsets the port of the return pipe, thereby blocking or slowing down the continued return of water from the return pipe to the tank. Attached Figure Description

[0032] The present utility model is described with reference to the following illustrative figures, wherein:

[0033] Figure 1 is a system schematic diagram of a water circulation control system for preventing backflow according to this utility model.

[0034] Figure 2 is a schematic diagram of the structure of the self-control switch device in the anti-backflow water circulation control system of this utility model.

[0035] Figure 3 is a top view of the self-control switch device in a water circulation control system for preventing backflow according to this utility model.

[0036] Figure label:

[0037] 1. Return pipe; 2. Water tank; 3. Electrical box; 4. Solenoid valve; 5. Hot water unit; 6. Process equipment; 7. Hot water pump; 8. Hot water pipe; 9. Flow switch; 10. Temperature sensor; 12. Maintenance pipe; 13. Cold water pipe; 14. Automatic control switch device; 101. First manual switch; 102. Second manual switch; 103. Third manual switch; 104. Fourth manual switch; 201. Inlet pipe; 141. Fixing component; 142. Toothed plate; 143. Sliding groove; 144. Rectangular slider; 145. Screw; 146. Gear; 147. Slide rod; 148. Float; 149. Limiting block; 1411. Toothed plate groove; 1412. Gear groove. Detailed Implementation

[0038] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0039] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0040] Therefore, features specified as "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] Example 1:

[0044] As shown in Figure 1, a water circulation control system for preventing backflow includes a return pipe 1, a water tank 2 and an electrical box 3, and a solenoid valve 4 is installed on the return pipe 1.

[0045] The solenoid valve 4 is electrically connected to the electrical box 3, and the switching of the solenoid valve 4 is controlled by the electrical box 3;

[0046] The return pipe 1 guides the water back to the water tank 2 in the water circulation control system.

[0047] In this embodiment, the closing of the solenoid valve 4 is controlled by the electrical box 3 to prevent the water in the return pipe 1 from continuing to flow back into the water tank 2. This solves the problem that in conventional water circulation systems, even after the water pump stops working, high-level water may still backflow into the water tank 2 and overflow.

[0048] Furthermore, it also includes a hot water unit 5, process equipment 6, and a hot water pump 7; it should be noted that process equipment 6 refers to equipment that can absorb the heat of hot water and convert it for other purposes, such as water heat recovery devices, including heat exchangers, wastewater treatment equipment, preheaters, etc.

[0049] The hot water pump 7 draws water from the water tank 2 and flows through the process equipment 6 and the hot water unit 5 in sequence. After being heated by the hot water unit 5, the water flows back to the water tank 2 through the return pipe 1.

[0050] The hot water pump 7 is electrically connected to the electrical box 3. The electrical box 3 receives the start and stop signals of the hot water pump 7 and controls the opening and closing of the solenoid valve 4 according to the start and stop signals of the hot water pump 7.

[0051] In this embodiment, the electrical box 3 controls the opening and closing of the solenoid valve 4 based on the start and stop signals of the hot water pump 7. The near-simultaneous start and stop of the hot water pump 7 and the solenoid valve 4 ensures that the water in the hot water unit 5, the process equipment 6, and the return pipe 1, hot water pipe 8 and cold water pipe 13 described below is in a sealed state, preventing the water from continuing to operate and overflowing into the water tank 2 due to gravity.

[0052] Furthermore, the process equipment 6 and the hot water pump 7 are interconnected by a hot water pipe 8;

[0053] The hot water unit 5 is electrically connected to the electrical box 3;

[0054] A flow switch 9 is installed on the hot water pipe 8 and is electrically connected to the electrical box 3. It is used to detect the water flow signal in the hot water pipe 8 and feed the detection signal back to the electrical box 3.

[0055] A temperature sensor 10 is installed inside the water tank 2 and is electrically connected to the electrical box 3. It is used to detect the water temperature inside the water tank 2 and feed the detection signal back to the electrical box 3.

[0056] In this embodiment, when the process equipment 6 stops working, its internal water inlet valve automatically closes, causing the water on the hot water pipe 8 to be unable to flow into the process equipment 6. At this time, when the water flow switch 9 on the hot water pipe 8 does not detect the signal of water flow, it feeds back the detection signal to the electrical box 3. The electrical box 3 feeds back the received signal to the hot water unit 5, at which time the hot water unit 5 performs a shutdown action.

[0057] When the electrical box 3 receives a signal from the hot water unit 5 to stop, it sends the signal back to the hot water pump 7, at which point the hot water pump 7 will stop. When the electrical box 3 receives a signal from the hot water pump 7 to stop, it sends the stop signal back to the solenoid valve 4, at which point the solenoid valve 4 will close.

[0058] Conversely, when temperature sensor 10 detects that the water temperature in water tank 2 is below 65℃, it will transmit a signal to electrical box 3. Electrical box 3 will then feed the signal back to the hot water unit 5 and start its operation. At the same time, electrical box 3 controls the hot water pump 7 to start its operation and controls the solenoid valve 4 to open, allowing the water to circulate in the water circulation system again. The hot water unit 5 will then heat the water below 65℃ and return it to water tank 2.

[0059] The water circulation system achieves automatic control during operation through two aspects: First, it detects the water flow signal through the water flow switch 9 to determine whether the process equipment 6 has stopped working. When the process equipment 6 stops working, all other equipment in the water circulation system also stops working. Second, it determines whether the water circulation system is operating by checking whether the water temperature in the water tank 2 meets the requirements of the process equipment 6 during operation, so that hot water in the water circulation system can be continuously supplied to the process equipment 6 for use.

[0060] Furthermore, a first manual switch 101 is provided on the hot water pipe 8, and the first manual switch 101 is in the normally open state.

[0061] In this embodiment, when the process equipment 6 needs maintenance, the first manual switch 101 can be turned off together with the fourth manual switch 104 described below, so that the water flow will not pass through the process equipment 6, making maintenance convenient.

[0062] Furthermore, two second manual switches 102 are also provided on the return pipe 1, and are respectively located at both ends of the solenoid valve 4. The second manual switches 102 are in the normally open state.

[0063] A maintenance pipe 12 is also provided between the hot water unit 5 and the water tank 2, and is connected in parallel with the return pipe 1. A third manual switch 103 is provided on the maintenance pipe 12, and the third manual switch 103 is normally closed.

[0064] In this embodiment, when the solenoid valve 4 needs maintenance, the two second manual switches 102 are closed to block the water from passing through the solenoid valve 4, and then the third manual switch 103 is opened, and the water flows back to the water tank 2 through the maintenance pipe 12, which facilitates the maintenance of the solenoid valve 4.

[0065] Furthermore, the hot water unit 5 and the process equipment 6 are interconnected by a cold water pipe 13, and a fourth manual switch 104 is provided on the cold water pipe 13, which is in the normally open state.

[0066] In this embodiment, when the hot water unit 5 needs maintenance, the fourth manual switch 104 and the second manual switch 102 mentioned above are turned off together, so that water will not continue to flow through the hot water unit 5, which facilitates maintenance.

[0067] Furthermore, the water tank 2 is equipped with an automatic control switch device 14, and the return pipe 1 is connected to the automatic control switch device 14. The automatic control switch device 14 automatically changes its switch state according to the water level.

[0068] In this embodiment, the self-control switch device 14 is a device that can automatically block and open the port of the return pipe 1, which can prevent excessive water from flowing back into the water tank 2 when the solenoid valve 4 is damaged, thus preventing water from overflowing.

[0069] As shown in Figure 2, the self-controlled switch device 14 further includes a fixing member 141 and a toothed plate 142 slidably mounted on the fixing member 141.

[0070] The top of the water tank 2 is provided with a water inlet pipe 201, the top of the fixing member 141 is connected to the return pipe 1, the bottom of the fixing member 141 is connected to the inside of the water tank 2 through the water inlet pipe 201, and the water inlet pipe 201 corresponds to the position of the return pipe 1.

[0071] The fixing member 141 is provided with a sliding groove 143 with a rectangular vertical cross section. The return pipe 1 and the inlet pipe 201 are both connected to the sliding groove 143. A rectangular slider 144 is installed in the sliding groove 143. When the rectangular slider 144 is moved, it completely covers or offsets the port of the return pipe 1. One end of the rectangular slider 144 is rotatably connected to a screw 145. A gear 146 is threaded onto the screw 145, and the gear 146 meshes with the toothed plate 142. It should be noted that the screw 145 can rotate relative to the rectangular slider 144, but the rectangular slider 144 will not rotate during the rotation of the screw 145. For the specific structure, please refer to Figure 2. The side of the rectangular slider 144 connected to the screw 145 has a circular groove. A circular slider is rotatably connected inside the circular groove. The circular groove has an opening, the outer diameter of which is smaller than the outer diameter of the circular slider. The screw 145 passes through the opening and connects to the circular slider.

[0072] The lower end of the toothed plate 142 is connected to the slide rod 147, which is slidably mounted on the water tank 2. A float 148 is installed at the lower end of the slide rod 147.

[0073] In this embodiment, when water flows back into the water tank 2 from a higher position, the water level in the water tank 2 rises, causing the float 148 to rise, which in turn causes the toothed plate 142 to move upward. The gear 146, which meshes with the toothed plate 142, rotates as the toothed plate 142 moves upward, driving the screw 145 to move. This causes the rectangular slider 144 to move within the sliding groove 143. When the rectangular slider 144 moves to completely cover the port of the return pipe 1, it blocks the water from flowing back into the water tank 2 through the return pipe. Conversely, when the rectangular slider 144 moves to a position where it is misaligned with the port of the return pipe 1, the water can flow back into the water tank 2 through the return pipe.

[0074] Furthermore, a limiting block 149 is provided at one end of the screw 145 away from the rectangular slider 144, and the outer diameter of the limiting block 149 is larger than the outer diameter of the screw 145.

[0075] In this embodiment, the screw 145 may move too much during its movement, causing one end of the screw 145 to disengage from the gear 146. Therefore, the limiting block 149 provided at one end of the screw 145 has an outer diameter larger than that of the screw 145, which is also larger than the maximum inner diameter of the threaded hole. When the screw 145 pushes the rectangular slider 144 to move, the limiting block 149 moves with the screw 145, but the limiting block 149 cannot pass through the threaded hole of the gear 146. This can prevent one end of the screw 145 from disengaging from the gear 146.

[0076] As shown in Figure 3, further, one end of the fixing member 141 is provided with a toothed groove 1411 and a gear groove 1412, and the toothed groove 1411 and the gear groove 1412 both penetrate the upper surface and the lower surface of the fixing member 141.

[0077] The toothed groove 1411 is used to slide the toothed plate 142, and the toothed plate 142 moves vertically within the toothed groove 1411.

[0078] The gear groove 1412 is used for rotatably mounting the gear 146.

[0079] In this embodiment, the toothed plate groove 1411 also serves to limit the movement space of the toothed plate 142, preventing the toothed plate 142 from disengaging from the gear 146. The gear groove 1412 also serves to limit the displacement of the gear 146, preventing the gear 146 from moving along the direction of the screw 145 during rotation. When the gear 146 rotates in place, the screw 145 can move relative to the gear 146 in the horizontal direction. Referring to Figures 2 and 3, multiple annularly arranged gear fixing plates are provided on both sides of the gear 146. The outer diameter of the circle formed by the multiple gear fixing plates is equal to the minimum inner diameter of the gear groove 1412. The gear 146 is rotatably locked in the gear groove 1412 by the multiple gear fixing plates.

[0080] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A water circulation control system for preventing backflow, characterized in that, It includes a return pipe (1), a water tank (2) and an electrical box (3). A solenoid valve (4) is installed on the return pipe (1). The solenoid valve (4) is electrically connected to the electrical box (3), and the switching of the solenoid valve (4) is controlled by the electrical box (3). The return pipe (1) guides water back to the water tank (2) in the water circulation control system.

2. The backflow prevention water circulation control system as described in claim 1, characterized in that, It also includes a hot water unit (5), process equipment (6) and a hot water pump (7); the hot water pump (7) draws water from the water tank (2) and flows through the process equipment (6) and the hot water unit (5) in sequence. After being heated by the hot water unit (5), the water flows back to the water tank (2) through the return pipe (1); the hot water pump (7) is electrically connected to the electrical box (3). The electrical box (3) receives the start and stop signals of the hot water pump (7) and controls the opening and closing of the solenoid valve (4) according to the start and stop signals of the hot water pump (7).

3. The backflow prevention water circulation control system as described in claim 2, characterized in that, The process equipment (6) and the hot water pump (7) are connected to each other by a hot water pipe (8); the hot water main unit (5) is electrically connected to the electrical box (3); a water flow switch (9) is installed on the hot water pipe (8) and is electrically connected to the electrical box (3) to detect the water flow signal in the hot water pipe (8) and feed the detection signal back to the electrical box (3); a temperature sensor (10) is installed in the water tank (2) and is electrically connected to the electrical box (3) to detect the water temperature in the water tank (2) and feed the detection signal back to the electrical box (3).

4. The backflow prevention water circulation control system as described in claim 3, characterized in that, A first manual switch (101) is installed on the hot water pipe (8), and the first manual switch (101) is in the normally open state.

5. The backflow prevention water circulation control system as described in claim 2, characterized in that, Two second manual switches (102) are also provided on the return pipe (1), and are located at both ends of the solenoid valve (4). The second manual switches (102) are normally open. A maintenance pipe (12) is also provided between the hot water unit (5) and the water tank (2), and is connected in parallel with the return pipe (1). A third manual switch (103) is provided on the maintenance pipe (12), and the third manual switch (103) is normally closed.

6. The backflow prevention water circulation control system as described in claim 2, characterized in that, The hot water unit (5) and the process equipment (6) are connected to each other by a cold water pipe (13). A fourth manual switch (104) is provided on the cold water pipe (13), and the fourth manual switch (104) is in the normally open state.

7. The backflow prevention water circulation control system as described in claim 1, characterized in that, The water tank (2) is equipped with an automatic control switch device (14), the return pipe (1) is connected to the automatic control switch device (14), and the automatic control switch device (14) automatically changes the switch state according to the water level.

8. The backflow prevention water circulation control system as described in claim 7, characterized in that, The automatic control switch device (14) includes a fixing member (141) and a toothed plate (142) slidably mounted on the fixing member (141); the top of the water tank (2) is provided with a water inlet pipe (201), the top of the fixing member (141) is connected to the return pipe (1), the bottom of the fixing member (141) is connected to the inside of the water tank (2) through the water inlet pipe (201), and the water inlet pipe (201) corresponds to the position of the return pipe (1); the fixing member (141) is provided with a sliding groove (143) with a rectangular vertical cross section, and both the return pipe (1) and the water inlet pipe (201) are connected to the sliding groove. (143) Connected, a rectangular slider (144) is installed in the sliding groove (143). When the rectangular slider (144) is moved, the rectangular slider (144) completely covers or offsets the port of the return pipe (1). One end of the rectangular slider (144) is rotatably connected to a screw (145). A gear (146) is threaded on the screw (145). The gear (146) meshes with the toothed plate (142). The lower end of the toothed plate (142) is connected to a sliding rod (147). The sliding rod (147) is slidably installed on the water tank (2). A float (148) is installed at the lower end of the sliding rod (147).

9. The backflow prevention water circulation control system as described in claim 8, characterized in that, The screw (145) has a limiting block (149) at one end away from the rectangular slider (144), and the outer diameter of the limiting block (149) is larger than the outer diameter of the screw (145).

10. The backflow prevention water circulation control system as described in claim 8, characterized in that, One end of the fixing member (141) is provided with a toothed plate groove (1411) and a gear groove (1412), both of which penetrate the upper and lower surfaces of the fixing member (141). The toothed plate groove (1411) is used to slide the toothed plate (142), and the toothed plate (142) moves vertically within the toothed plate groove (1411). The gear groove (1412) is used to rotatably mount the gear (146).

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