Automatic water replenishing device for reservoir

Abstract

The utility model relates to an automatic water replenishing device for a reservoir, which comprises a water suction pump and an auxiliary pump connected to the water suction pump, the water suction pump is used for replenishing water into the reservoir, and the auxiliary pump is used for injecting water into the water suction pump to discharge air in the water suction pump and a water suction pipeline. The system further comprises a water suction pump main circuit, a water suction pump control circuit, an auxiliary pump main circuit, an auxiliary pump control circuit, a first intermediate relay, a second intermediate relay, a time relay, an upper limit switch arranged at the top in the reservoir and a lower limit switch arranged at the bottom in the reservoir. The first intermediate relay is used for enabling the water suction pump not to stop once the water suction pump is started until water is pumped to the upper limit switch. And the auxiliary pump temporarily injects water into the water suction pump through the second intermediate relay and the time relay.

Description

Technical Field

[0001] The utility model belongs to the field of water pool configuration and relates to an automatic water replenishing device for a water storage pool. Background Art

[0002] The rolling mills and heating furnaces in steel plants require cooling circulating water, which is placed in a water reservoir. The circulating water will be lost, so it needs to be replenished in time. The water pump draws water from the water source to replenish the water reservoir. If the water pump is always turned on to replenish water, it will cause a waste of water resources. If it is not turned on, the water level in the circulating water reservoir will drop, resulting in insufficient water supply. Lack of water in the rolling mill will cause insufficient cooling of the rolls and roll breakage accidents, and lack of water in the heating furnace will cause serious consequences such as furnace collapse. Therefore, it is usually necessary to see the water engineer responsible for replenishing water to the circulating water reservoir.

[0003] If you want to save the trouble of plumbers, you can set an upper limit switch and a lower limit switch on the reservoir to pump water in coordination with the water pump. Since the water is shaking, the limit switch will close and open as the water shakes, causing the main equipment to open and close, thus causing damage to the main equipment. Utility Model Content

[0004] The utility model aims to provide an automatic water replenishing device for a water reservoir, which solves the problem of how to automatically replenish water to the water reservoir without being affected by water shaking.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] The utility model provides an automatic water replenishment device for a water reservoir, comprising a water pump and an auxiliary pump connected to the water pump, wherein the water pump is used to replenish water into the water reservoir, and the auxiliary pump is used to inject water into the water pump to discharge air in the water pump and the water pumping pipeline, and further comprises a water pump main circuit, a water pump control circuit, an auxiliary pump main circuit and an auxiliary pump control circuit, and further comprises a first intermediate relay, a second intermediate relay and a time relay, an upper limit switch arranged at the top of the water reservoir and a lower limit switch arranged at the bottom of the water reservoir, wherein the water pump main circuit is provided with the first intermediate relay, a second intermediate relay and a time relay, an upper limit switch arranged at the top of the water reservoir and a lower limit switch arranged at the bottom of the water reservoir, and the water pump main circuit is provided with the first intermediate relay, a second intermediate relay and a time relay, and the water pump main circuit is provided with the second ... first intermediate relay, a second intermediate relay and a time relay, and the water pump main circuit is provided with the second intermediate relay, a second intermediate relay and a time relay, and the water pump main circuit is provided with the first intermediate relay, a second intermediate relay and a time relay, and the water pump main circuit is provided with the first intermediate relay, a second intermediate relay and a time relay, and the water pump main circuit is provided with the first intermediate relay, a second intermediate relay and a time relay, The normally open contact I of the intermediate relay, the upper limit switch, the lower limit switch, and the coil I of the first intermediate relay are connected in series in the water pump control circuit, and the normally open contact II of the first intermediate relay is arranged in parallel with the lower limit switch. The normally open contact III of the first intermediate relay, the coil II of the second intermediate relay and the normally closed delay contact of the time relay are arranged in series in the auxiliary pump control circuit, the coil III of the time relay is connected in parallel with the coil II of the second intermediate relay, and the normally open contact IV of the second intermediate relay is arranged in the auxiliary pump main circuit.

[0007] Preferably, a solenoid valve is also provided on the water supply pipeline where the auxiliary pump is located, and the solenoid valve is connected in parallel with the coil II.

[0008] Preferably, it also includes a first thermal relay, and the coil IV of the first thermal relay is provided on the main circuit of the water pump, and the normally closed protection contact I of the first thermal relay is connected in series with the upper limit switch, the lower limit switch, and the coil I.

[0009] Preferably, it also includes a second thermal relay, and the auxiliary pump main circuit is provided with a coil V of the second thermal relay, and the normally closed protection contact II of the second thermal relay is connected in series with the normally open contact III, the coil II, and the normally closed delay contact.

[0010] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0011] The utility model provides an automatic water replenishment device for a water reservoir. Since a first intermediate relay is provided, the normally open contact II in the first intermediate relay is connected in parallel with the lower limit switch, and the normally open contact I of the first intermediate relay is provided on the main circuit of the water pump. Therefore, when the water in the water reservoir is lower than the level of the lower limit switch, the normally open contact II is closed, the coil I of the first intermediate relay is energized, the normally open contact I and the normally open contact II are both turned on, the main circuit of the water pump is turned on, and the water pump works. At this time, if the water shakes and causes the lower limit switch to open and close, the normally open contact II in the first intermediate relay is still in the on state and the water pump will not be powered off until the water level in the water reservoir reaches the level of the upper limit switch. The upper limit switch is turned off, causing the coil I of the first intermediate relay to lose power, the normally open contact I and the normally open contact II are both turned off, and the water pump is powered off. Therefore, the water replenishment process is not affected by the shaking of the water. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0013] Figure 1 It is a schematic diagram of an automatic water replenishing device for a water reservoir according to a preferred embodiment of the utility model;

[0014] Figure 2 It is a circuit diagram of a water pump control circuit and an auxiliary pump control circuit in an automatic water replenishment device for a water storage tank;

[0015] Figure 3 This is the circuit diagram of the main circuit of the water pump;

[0016] Figure 4 It is the circuit diagram of the water pump control circuit;

[0017] The reference numerals are described as follows:

[0018] 1. Water pump; 2. Auxiliary pump; 3. Water pump main circuit; 4. Water pump control circuit; 5. Auxiliary pump main circuit; 6. Auxiliary pump control circuit; 7. First intermediate relay; 71. Coil I; 72. Normally open contact I; 73. Normally open contact II; 74. Normally open contact III; 8. Second intermediate relay; 81. Coil II; 82. Normally open contact IV; 9. Time relay; 91. Coil III; 92. Normally closed delay contact; 10. Upper limit switch; 11. Lower limit switch; 12. Solenoid valve; 13. First thermal relay; 131. Coil IV; 132. Normally closed protection contact I; 14. Second thermal relay; 141. Coil V; 142. Normally closed protection contact II; 15. Water reservoir. DETAILED DESCRIPTION

[0019] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] like Figure 1 As shown, the water reservoir automatic water replenishment device is arranged on the water reservoir 15, and is used to replenish water to the water reservoir 15 to prevent the water in the water reservoir 15 from being exhausted.

[0021] The automatic water replenishment device for the water reservoir includes a water pump 1 and an auxiliary pump 2. The water pump 1 injects water drawn from a water source into the water reservoir 15. The auxiliary pump 2 is used to inject water into the water pump 1. Since there may be air in the water pump 1 and the water pumping pipeline where it is located, it cannot effectively pump water. The auxiliary pump 2 injects water into the water pump 1 to expel the air so that the water pump 1 can pump water. A solenoid valve 12 is also provided on the water supply pipeline where the auxiliary pump 2 is located, which is used to close the water supply pipeline.

[0022] A lower limit switch 11 and an upper limit switch 10 are provided in the water reservoir 15. The lower limit switch 11 is provided at the bottom of the water reservoir 15, and the upper limit switch 10 is provided at the top of the water reservoir 15. The design purpose is that when the water level reaches the lower limit switch 11, the water pump 1 is started to pump water; when the water level reaches the upper limit switch 10, the water pump 1 is stopped.

[0023] Figure 3 The main circuit 4 of the water pump is used to supply power to the water pump 1 and is a three-phase circuit. The main circuit 4 of the water pump includes an isolating switch QS (switch), a circuit breaker QF, a normally open contact Ⅰ72 of the first intermediate relay 7 and a coil Ⅳ131 of the first thermal relay 13. The housing of the water pump 1 is grounded.

[0024] Figure 4The auxiliary pump main circuit 5 is used to supply power to the auxiliary pump 2 and is a two-phase circuit. The auxiliary pump main circuit 5 includes an isolating switch QS (switch), a circuit breaker QF, a normally open contact IV82 of the second intermediate relay 8 and a coil V141 of the second thermal relay 14.

[0025] Figure 2 The water pump control circuit 4 and the auxiliary pump control circuit 6 are shown, which are combined into a whole control circuit. The upper limit switch 10 and the lower limit switch 11 are arranged in the water pump control circuit 4. The upper limit switch 10 and the lower limit switch 11 are turned on when no water is detected, and turned off when water is present.

[0026] In the water pump control circuit 4, the upper limit switch 10, the lower limit switch 11, the coil I71 of the first intermediate relay 7 and the normally closed protection contact I132 of the first thermal relay 13 are connected in series. The normally open contact II73 of the first intermediate relay 7 is connected in parallel with the lower limit switch 11.

[0027] When the water in the water reservoir 15 is insufficient, the water level drops below the lower limit switch 11. At this time, the lower limit switch 11 is turned on, and the coil I71 is energized. Figure 3 The normally open contact Ⅰ72 in the main circuit 3 of the water pump is turned on, and the water pump 1 is started to pump water. At this time, even if there is water shaking and the lower limit switch 11 is turned on and off, as long as the lower limit switch 11 is turned on once, the normally open contact Ⅱ73 is turned on after the coil Ⅰ71 is energized. At this time, although the lower limit switch 11 is disconnected, the coil Ⅰ71 is always energized, and the normally open contact Ⅰ72 on the main circuit 3 of the water pump will not be disconnected, and the water pump 1 will not stop. Until the water level reaches the upper limit switch 10, the upper limit switch 10 is disconnected, causing the coil Ⅰ71 to lose power, and the normally open contact Ⅰ72 on the main circuit 3 of the water pump is disconnected to stop the water pump 1.

[0028] like Figure 3 The water pump main circuit 3 is also provided with a coil IV131 in the first thermal relay 13. When the temperature is too high, the normally closed protection contact I132 is disconnected, causing the coil I71 in the water pump control circuit 4 to lose power, and the normally open contact I72 in the water pump main circuit 3 is disconnected, thereby providing overload protection for the water pump 1.

[0029] When the water pump 1 is started, there may be air in the water pump 1 and the water pumping pipeline, and the air needs to be pumped out before it can work. In this example, an auxiliary pump 2 is used, which is connected to the water injection port of the water pump 1 to inject water into the water pump 1 and the water pumping pipeline. After a short injection of water, the water pump 1 can work.

[0030] Figure 2 The auxiliary pump control circuit 6 in the auxiliary pump 2 can realize the short-term water injection function of the auxiliary pump 2.

[0031] like Figure 2When coil I71 is energized, the normally open contact III74 in the auxiliary pump control circuit 6 is turned on, and coil II81 in the second intermediate relay 8 is energized. Figure 4 The normally open contact IV82 in the circuit is turned on, and auxiliary pump 2 starts.

[0032] Figure 2 In the circuit, coil III 91 in time relay 9 is connected in parallel with coil II 81. After coil III 91 is energized, normally closed delay contact 92 is disconnected after the set time, and coil II 81 loses power. Figure 4 The normally open contact IV82 in the auxiliary pump main circuit 5 is disconnected, and the auxiliary pump 2 stops working. Figure 2 The solenoid valve 12 connected in parallel with the coil III 91 (see Figure 1 ) is also powered off.

[0033] like Figure 4 The auxiliary pump main circuit 5 is also provided with a coil V141 in the second thermal relay 14. When the auxiliary pump 2 is overloaded, the coil V141 is Figure 2 The normally closed protection contact II 142 in the auxiliary pump is de-energized, and the coil II 81 loses power, causing the normally open contact IV 82 in the auxiliary pump main circuit 5 to be disconnected, and the auxiliary pump 2 stops. The second thermal relay 14 provides overload protection for the auxiliary pump 2.

[0034] In summary, this example can realize automatic water replenishment of the water reservoir 15, and the water replenishment process is not affected by the shaking of water in the reservoir.

[0035] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A water tank automatic water replenishment device, characterized in that: The invention comprises a water pump (1) and an auxiliary pump (2) connected to the water pump (1), wherein the water pump (1) is used to replenish water into a water reservoir, and the auxiliary pump (2) is used to inject water into the water pump (1) to discharge air from the water pump (1) and the water pumping pipeline. The invention also comprises a water pump main circuit (3), a water pump control circuit (4), an auxiliary pump main circuit (5) and an auxiliary pump control circuit (6), and also comprises a first intermediate relay (7), a second intermediate relay (8), a time relay (9), an upper limit switch (10) arranged at the top of the water reservoir, and a lower limit switch (11) arranged at the bottom of the water reservoir. The water pump main circuit (3) is provided with a normally open contact I (72) of the first intermediate relay (7), and the upper limit switch (11) is provided with a normally open contact I (72) of the first intermediate relay (7). 0), the lower limit switch (11) and the coil I (71) of the first intermediate relay (7) are connected in series in the water pump control circuit (4), and a normally open contact II (73) of the first intermediate relay (7) is arranged in parallel with the lower limit switch (11); the normally open contact III (74) of the first intermediate relay (7), the coil II (81) of the second intermediate relay (8) and the normally closed delay contact (92) of the time relay (9) are arranged in series in the auxiliary pump control circuit (6); the coil III (91) of the time relay (9) is connected in parallel with the coil II (81) of the second intermediate relay (8), and the normally open contact IV (82) of the second intermediate relay (8) is arranged in the auxiliary pump main circuit (5).

2. The automatic water replenishing device for a water reservoir according to claim 1, characterized in that: A solenoid valve (12) is also provided on the water supply pipeline where the auxiliary pump (2) is located, and the solenoid valve (12) is connected in parallel with the coil II (81).

3. The automatic water replenishing device for a water reservoir according to claim 1, characterized in that: It also includes a first thermal relay (13), wherein the water pump main circuit (3) is provided with a coil IV (131) of the first thermal relay (13), and the normally closed protection contact I (132) of the first thermal relay (13) is connected in series with the upper limit switch (10), the lower limit switch (11), and the coil I (71).

4. The automatic water replenishing device for a water reservoir according to claim 1, characterized in that: It also includes a second thermal relay (14), wherein the auxiliary pump main circuit (5) is provided with a coil V (141) of the second thermal relay (14), and the normally closed protection contact II (142) of the second thermal relay (14) is connected in series with the normally open contact III (74), the coil II (81), and the normally closed delay contact (92).

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