Magnetic drive pump liquid supply device

Abstract

The invention discloses a magnetic drive pump liquid supply device which comprises a magnetic drive pump with an input port and an output port. The butt joint tank is located above the input port of the magnetic drive pump, and the upper end of the liquid storage space of the butt joint tank is provided with a connecting port and a baffle assembly located in the area where the connecting port is located; the first connecting pipe is connected with the butt joint tank and the input port of the magnetic pump; the liquid inlet pipe is connected with the butt joint tank, and the connection point is located on the upper area of the liquid storage space and away from one side of the connector; the vacuumizing device is connected with the connecting port; the liquid level sensor is used for detecting the liquid level of liquid in the butt joint tank. The butt joint tank is arranged above the input port of the magnetic drive pump, and the vacuumizing device is connected to the butt joint tank, so that the suction and dry beating problems of the magnetic drive pump are solved; the connecting point of the liquid inlet pipe and the butt joint tank is arranged on the side away from the connecting opening, and the baffle assembly is arranged in the area where the connecting opening is located, so that when the vacuumizing device works, sputtered liquid can be effectively prevented from entering the connecting opening.

Description

Technical Field

[0001] The invention relates to the field of liquid pipeline transportation, and in particular to a magnetic pump liquid supply device. Background Art

[0002] The existing magnetic pump has the characteristic of poor suction capacity. Suction can only be formed when liquid enters the pump inlet. In addition, the magnetic pump that transports chemical liquid cannot be pumped without a medium. Pumping without a medium will quickly cause damage to the impeller of the pump. Currently, only magnetic pumps can be used to pump liquids in storage tanks. For barreled chemicals and chemicals in tank trucks, they are transported by pneumatic pumps. However, pneumatic pumps are more expensive than magnetic pumps. Summary of the invention

[0003] In view of the above problems, the present invention proposes a magnetic pump liquid supply device.

[0004] The technical solution adopted by the present invention is as follows: A magnetic pump liquid supply device, comprising: A magnetic pump having an input port and an output port, wherein the output port of the magnetic pump is used to be connected to the supply pipeline through a first pipeline; A docking tank is located above the input port of the magnetic pump, the docking tank has a liquid storage space, the upper end of the liquid storage space has a connecting port, and the liquid storage space also has a baffle assembly, the baffle assembly is located in the area where the connecting port is located, and the baffle assembly is used to prevent the liquid splashed in the liquid storage space from entering the connecting port; A first connecting pipe, one end of which is connected to the lower end of the docking tank, and the other end of which is connected to the input port of the magnetic pump; A liquid inlet pipe, one end of which is connected to the docking tank, the connection point between the liquid inlet pipe and the docking tank is located in the upper area of ​​the liquid storage space and away from the connecting port, and the other end of the liquid inlet pipe is used to connect to a liquid supply source through a liquid supply pipe; A vacuum pumping device connected to the connecting port via a vacuum pumping pipe, wherein a first control valve is installed on the vacuum pumping pipe; The liquid level sensor is arranged on the docking tank and is used to detect the liquid level of the liquid in the docking tank.

[0005] The present application can provide a docking tank above the input port of the magnetic pump; Working principle of the present application: before the magnetic pump works, ensure that there is liquid in the docking tank. If there is no liquid in the docking tank, vacuum can be performed by opening the first control valve and the vacuum device to reduce the air pressure in the docking tank and suck the liquid from the liquid supply source into the docking tank; when the magnetic pump is working, due to the factor of gravity, the liquid in the docking tank will continuously enter the magnetic pump through the first connecting pipe. When the liquid level in the docking tank decreases, the pressure in the docking tank decreases (in a negative pressure state). Under the action of negative pressure, the liquid from the liquid supply source can be pumped into the docking tank and continuously replenished into the docking tank; the liquid level in the docking tank can be detected by the liquid level sensor. When the liquid level is low, the first control valve and the vacuum device can be opened to vacuum, so that the air pressure in the docking tank is further reduced, so that the liquid from the liquid supply source is accelerated to enter the docking tank. When the liquid level is lower than the minimum value, it indicates that there is a problem with the device and the magnetic pump stops working.

[0006] The present application solves the suction and dry-beating problems of the magnetic pump by arranging a docking tank above the input port of the magnetic pump and a vacuum pumping device connected to the docking tank (due to the factor of gravity, as long as the docking tank is not empty, the magnetic pump can continuously suck liquid to work normally); by arranging the connection point between the liquid inlet pipe and the docking tank on the side away from the connection port, and arranging a baffle assembly in the area where the connection port is located, it can effectively prevent splashed liquid from entering the connection port when the vacuum pumping device is working.

[0007] In the present application, the liquid supply source may be a liquid supply barrel or a tank truck.

[0008] In one embodiment of the present invention, the connection port is located on the top wall of the docking tank, and the baffle assembly includes: A first baffle, the upper end of which is fixed to the top wall of the docking tank, and the lower end of which extends to a side away from the liquid inlet pipe, the first baffle having a first surface and a second surface, wherein the second surface faces away from the liquid inlet pipe; A second baffle, the upper end of which is fixed to the top wall or the side wall of the docking tank, the lower end of which faces the second surface of the first baffle, a first gas inlet is formed between the second baffle and the second surface, and the connection port is within the space enclosed by the first baffle and the second baffle; The third baffle is located in the space surrounded by the first baffle and the second baffle. The lower end of the third baffle is fixed to the second surface, and the upper end extends toward the upper end of the second baffle. A second gas inlet is formed between the upper end of the third baffle and the second baffle.

[0009] The lower ends of the first baffle and the second baffle are both inclined downward, and most of the liquid splashed onto the first surface and the second baffle will fall down. Even a small part of the liquid entering the first gas inlet will be blocked by the third baffle, that is, the liquid passing through the first gas inlet will fall back under the action of its own gravity, and it is difficult to pass through the channel formed between the second baffle and the third baffle (the upper end of the channel is the second gas inlet, and the lower end is the first gas inlet) to enter the second gas inlet. Therefore, the liquid will not enter the connecting port. The baffle assembly of the present application can effectively prevent the liquid from entering the vacuum tube.

[0010] In one embodiment of the present invention, the second baffle and the third baffle are arranged in parallel.

[0011] In one embodiment of the present invention, there are at least four liquid level sensors, which are, from bottom to top, a first liquid level sensor, a second liquid level sensor, a third liquid level sensor, and a fourth liquid level sensor, and the fourth liquid level sensor is located below the baffle assembly.

[0012] In one embodiment of the present invention, it further includes: a first branch pipe, one end of which is connected to the vacuum pipe and the other end of which has a first connection plate, and a first stop valve is installed on the first branch pipe; a second branch pipe, one end of which is connected to one end of the first connecting pipe close to the input port of the magnetic pump, and the other end of which has a second connecting plate, the second branch pipe is equipped with the second stop valve, and the height of the second stop valve is higher than the height of the second liquid level sensor; The second connecting tube is a flexible tube, one end of which is detachably connected to the first connecting disk, and the other end of which is detachably connected to the second connecting disk.

[0013] In actual use, it also includes a control unit, which is connected to each sensor and each control valve to control the operation of each control valve. A specific working mode of the magnetic pump liquid supply device: S1. In the initial state (there is no liquid in the first connecting pipe), the liquid supply pipe is connected to the liquid supply source, and the two ends of the second connecting pipe are respectively installed on the first connecting plate and the second connecting plate, and the first stop valve and the second stop valve are opened, and the first control valve and the fourth control valve are opened. The vacuum device is operated to extract the air in the first connecting pipe and the buffer tank, so that the liquid of the liquid supply source enters the docking tank after passing through the liquid supply pipe and the liquid inlet pipe, and flows into the first connecting pipe. When the second liquid level sensor is triggered, the vacuum device stops working, and the first stop valve, the second stop valve and the first control valve are closed; S2, the magnetic pump works to transport the liquid to the supply pipeline through the first pipeline. As the magnetic pump works, the liquid level in the docking tank decreases, and the pressure in the docking tank decreases (in a negative pressure state). Under the action of the negative pressure, the liquid from the liquid supply source can be pumped into the docking tank, and the liquid is continuously replenished in the docking tank. During the operation of the magnetic pump, if the liquid level continues to decrease (for example, the magnetic pump is pumped out too fast, there is air leakage, etc.), when it decreases to below the position of the second liquid level sensor (the second liquid level sensor is not triggered at this time), the first control valve is opened, and the vacuum device is operated to further reduce the air pressure in the docking tank, so that the liquid from the liquid supply source is accelerated to enter the docking tank. When the liquid level in the docking tank continues to rise until the second liquid level sensor is triggered, the first control valve is closed, and the vacuum device is closed. During the operation of the electromagnetic pump, if the liquid level is lower than the position of the first liquid level sensor (the first liquid level sensor is not triggered at this time), the liquid level in the docking tank is too low, the electromagnetic pump stops working, and the control unit alarms; During the operation of the electromagnetic pump, if the fourth liquid level sensor is triggered and the liquid level in the docking tank is too high, the electromagnetic pump stops working and the control unit alarms.

[0014] In actual use, each control valve can be a solenoid valve or a pneumatic valve.

[0015] The design of the first branch pipe, the second branch pipe and the second connecting pipe is to ensure that the liquid can completely enter the second connecting pipe, effectively preventing the magnetic pump from running dry. The height of the second stop valve is higher than the height of the second liquid level sensor. This arrangement can prevent the liquid in the second branch pipe from being higher than the second stop valve during initial state debugging, so that the second connecting pipe can be removed after the initial state debugging is completed.

[0016] In actual use, the liquid level sensor is a capacitive or photoelectric sensor.

[0017] In one embodiment of the present invention, the vacuum device is a vacuum pump.

[0018] In one embodiment of the present invention, the vacuum device is a Venturi vacuum generating device, the Venturi vacuum generating device has a high-pressure gas access end, a vacuum end and an exhaust end, the vacuum tube is connected to the vacuum end, the high-pressure gas access end is used to connect to a high-pressure nitrogen source through a second pipeline, a sixth control valve is installed on the second pipeline, and the magnetic pump liquid supply device also includes: A first gas supply pipe, one end of which is connected to the connection port or the vacuum pipe, and the other end of which is used to be connected to the high-pressure nitrogen source; The second control valve is installed on the first air supply pipe.

[0019] The vacuum degree that the magnetic pump can form is limited. When the liquid supply source no longer supplies liquid (for example, the liquid inlet pipe is in a closed state and no new liquid flows in), as the magnetic pump works, the liquid in the docking tank is gradually extracted. When the extraction makes the docking tank reach a certain vacuum degree, the magnetic pump cannot extract the remaining liquid. In this case, the present application can add nitrogen to the docking tank by setting a first air supply pipe and a second control valve, thereby increasing the air pressure in the docking tank, so that the magnetic pump can transport the remaining liquid in the docking tank to the supply pipeline.

[0020] In one embodiment of the present invention, the liquid supply source is a plurality of liquid supply barrels; The liquid supply tank is connected to the first gas supply pipe or the high-pressure nitrogen source through a second gas supply pipe, and a third control valve is installed on the second gas supply pipe; The liquid supply barrel is connected to the liquid inlet pipe through a liquid supply pipe, and a fourth control valve is installed on the liquid supply pipe.

[0021] The present application can be connected with multiple liquid supply barrels. When one liquid supply barrel is used up, another liquid supply barrel can be quickly matched with the docking tank by switching the control valve. Nitrogen is allowed to enter by opening the third control valve to increase the air pressure to prevent the liquid supply barrel from deflation. In actual operation, the third control valve and the fourth control valve corresponding to the liquid supply barrel are opened and closed at the same time.

[0022] In one embodiment of the present invention, the magnetic pump is fixed to the lower end of the docking tank.

[0023] In one embodiment of the present invention, a fifth control valve is installed on the first pipeline.

[0024] The beneficial effects of the present invention are as follows: the present application solves the suction and dry-beating problems of the magnetic pump by arranging a docking tank above the input port of the magnetic pump and a vacuum pumping device connected to the docking tank; by arranging the connection point between the liquid inlet pipe and the docking tank on the side away from the connection port, and arranging a baffle assembly in the area where the connection port is located, it can effectively prevent splashed liquid from entering the connection port when the vacuum pumping device is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of a magnetic pump liquid supply device in Example 1; Figure 2 is a partial cross-sectional view of the docking tank; Figure 3 is a schematic diagram of a magnetic pump liquid supply device in Example 2; Figure 4 It is a schematic diagram of a magnetic pump liquid supply device connected to two liquid supply barrels; Figure 5 It is a schematic diagram of the magnetic pump liquid supply device of Example 3.

[0026] The reference numerals in the figures are: 1. Magnetic pump; 11. Input port; 12. Output port; 21. First pipeline; 22. Supply pipeline; 23. Fifth control valve; 24. First connecting pipe; 3. Docking tank; 31. Liquid storage space; 311. Connecting port; 32. Baffle assembly; 321. First baffle; 3211. First surface; 3212. Second surface; 322. Second baffle; 323. Third baffle; 324. First gas inlet; 325. Second gas inlet; 33. Liquid inlet pipe; 341. First liquid level sensor; 342. Second liquid level sensor; 343. Third liquid level sensor; 344. Fourth liquid level Sensor; 41, vacuum device; 411, high-pressure gas access terminal; 412, vacuum terminal; 413, exhaust terminal; 42, vacuum tube; 43, first control valve; 44, second pipeline; 45, sixth control valve; 51, first branch pipe; 52, first connecting plate; 53, first stop valve; 54, second branch pipe; 55, second connecting plate; 56, second stop valve; 57, second connecting pipe; 6, high-pressure nitrogen source; 71, first air supply pipe; 72, second control valve; 81, liquid supply barrel; 82, second air supply pipe; 83, third control valve; 84, fourth control valve; 85, liquid supply pipe. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] The present invention is described in detail below in conjunction with the accompanying drawings.

[0031] Example 1 like Figure 1 and 2 As shown, a magnetic pump liquid supply device comprises: The magnetic pump 1 has an input port 11 and an output port 12, and the output port 12 of the magnetic pump 1 is used to connect with the supply pipeline 22 through the first pipeline 21; The docking tank 3 is located above the input port 11 of the magnetic pump 1. The docking tank 3 has a liquid storage space 31. The upper end of the liquid storage space 31 has a connecting port 311. The liquid storage space 31 also has a baffle assembly 32. The baffle assembly 32 is located in the area where the connecting port 311 is located. The baffle assembly 32 is used to prevent the liquid splashed in the liquid storage space 31 from entering the connecting port 311. A first connecting pipe 24, one end of which is connected to the lower end of the docking tank 3, and the other end of which is connected to the input port 11 of the magnetic pump 1; A liquid inlet pipe 33, one end of which is connected to the docking tank 3, the connection point between the liquid inlet pipe 33 and the docking tank 3 is located in the upper area of ​​the liquid storage space 31 and away from the connecting port 311, and the other end of the liquid inlet pipe 33 is used to connect to the liquid supply source through the liquid supply pipe 85; A vacuum device 41 is connected to the connection port 311 via a vacuum pipe 42, and a first control valve 43 is installed on the vacuum pipe 42; The liquid level sensor is arranged on the docking tank 3 and is used to detect the liquid level of the liquid in the docking tank 3 .

[0032] The present application can provide a docking tank 3 above the input port 11 of the magnetic pump 1; Working principle of the present application: before the magnetic pump 1 works, it is ensured that there is liquid in the docking tank 3. If there is no liquid in the docking tank 3, the first control valve 43 and the vacuum device 41 can be opened to vacuumize, so that the air pressure in the docking tank 3 becomes low, and the liquid is sucked into the docking tank 3 from the liquid supply source; when the magnetic pump 1 works, due to the factor of gravity, the liquid in the docking tank 3 will continuously enter the magnetic pump 1 through the first connecting pipe 24. When the liquid level in the docking tank 3 is reduced, the pressure in the docking tank 3 is reduced (in a negative pressure state). Under the action of negative pressure, the liquid from the liquid supply source can be pumped into the docking tank 3, and the docking tank 3 is continuously replenished; the liquid level in the docking tank 3 can be detected by the liquid level sensor. When the liquid level is low, the first control valve 43 and the vacuum device 41 can be opened to vacuumize, so that the air pressure in the docking tank 3 is further reduced, so that the liquid from the liquid supply source is accelerated to enter the docking tank 3. When the liquid level is lower than the minimum value, it indicates that there is a problem with the device, and the magnetic pump 1 stops working.

[0033] The present application solves the suction and dry-beating problems of the magnetic pump 1 by arranging a docking tank 3 above the input port 11 of the magnetic pump 1 and a vacuum pumping device 41 connected to the docking tank 3 (due to the factor of gravity, as long as the docking tank 3 is not empty, the magnetic pump 1 can continuously suck up liquid to work normally); by arranging the connection point between the liquid inlet pipe 33 and the docking tank 3 on the side away from the connection port 311, and arranging a baffle assembly 32 in the area where the connection port 311 is located, it can effectively prevent the splashed liquid from entering the connection port 311 when the vacuum pumping device 41 is working.

[0034] In the present application, the liquid supply source may be a liquid supply barrel 81 or a tank truck.

[0035] like Figure 2 As shown, in this embodiment, the connection port 311 is located on the top wall of the docking tank 3, and the baffle assembly 32 includes: A first baffle 321, the upper end of which is fixed to the top wall of the docking tank 3, and the lower end of which extends to a side away from the liquid inlet pipe 33. The first baffle 321 has a first surface 3211 and a second surface 3212, and the second surface 3212 faces away from the liquid inlet pipe 33; The second baffle 322 has an upper end fixed to the top wall or side wall of the docking tank 3, and a lower end facing the second surface 3212 of the first baffle 321. A first gas inlet 324 is formed between the second baffle 322 and the second surface 3212. The connection port 311 is within the space enclosed by the first baffle 321 and the second baffle 322. The third baffle plate 323 is located in the space enclosed by the first baffle plate 321 and the second baffle plate 322. The lower end of the third baffle plate 323 is fixed to the second surface 3212, and the upper end extends toward the upper end of the second baffle plate 322. A second gas inlet 325 is formed between the upper end of the third baffle plate 323 and the second baffle plate 322.

[0036] The lower ends of the first baffle 321 and the second baffle 322 are both tilted downward, and most of the liquid splashed onto the first surface and the second baffle 322 will fall down. Even if a small part enters the first gas inlet 324, it will be blocked by the third baffle 323. That is, the liquid passing through the first gas inlet 324 will fall back under the action of its own gravity, and it is difficult to pass through the channel formed between the second baffle 322 and the third baffle 323 (the upper end of the channel is the second gas inlet 325, and the lower end is the first gas inlet 324) to enter the second gas inlet 325. Therefore, the liquid will not enter the connecting port 311. The baffle assembly 32 of the present application can effectively prevent the liquid from entering the vacuum tube 42.

[0037] like Figure 2 As shown, in this embodiment, the second baffle 322 and the third baffle 323 are arranged in parallel.

[0038] like Figure 1As shown, in this embodiment, there are at least four liquid level sensors, which are, from bottom to top, a first liquid level sensor 341 , a second liquid level sensor 342 , a third liquid level sensor 343 and a fourth liquid level sensor 344 , and the fourth liquid level sensor 344 is located below the baffle assembly 32 .

[0039] like Figure 1 As shown, in this embodiment, the vacuum device 41 is a vacuum pump.

[0040] During actual use, the magnetic pump 1 is fixed to the lower end of the docking tank 3 .

[0041] In this embodiment, a fifth control valve 23 is installed on the first pipeline 21 .

[0042] Example 2 like Figure 3 As shown, the difference between this embodiment and embodiment 1 is that the vacuum device 41 is a Venturi vacuum generating device, the Venturi vacuum generating device has a high-pressure gas access end 411, a vacuum end 412 and an exhaust end 413, the vacuum tube 42 is connected to the vacuum end 412, the high-pressure gas access end 411 is used to connect to the high-pressure nitrogen source 6 through the second pipeline 44, and the second pipeline 44 is installed with a sixth control valve 45. The magnetic pump liquid supply device of this embodiment also includes: A first gas supply pipe 71, one end of which is connected to the connection port 311 or the vacuum pipe 42, and the other end of which is used to be connected to the high-pressure nitrogen source 6; The second control valve 72 is installed on the first air supply pipe 71 .

[0043] The vacuum degree that the magnetic pump can form is limited. When the liquid supply source no longer supplies liquid (for example, the liquid inlet pipe is in a closed state and no new liquid flows in), as the magnetic pump works, the liquid in the docking tank is gradually extracted. When the extraction makes the docking tank reach a certain vacuum degree, the magnetic pump cannot extract the remaining liquid. In this case, the present application can add nitrogen to the docking tank by setting a first air supply pipe and a second control valve, thereby increasing the air pressure in the docking tank, so that the magnetic pump can transport the remaining liquid in the docking tank to the supply pipeline.

[0044] In actual use, the liquid supply source can be a tank truck or a liquid supply barrel 81, such as Figure 4 As shown, when the liquid supply source also provides a liquid supply barrel 81, there may be multiple liquid supply barrels 81; The liquid supply barrel 81 is connected to the first air supply pipe 71 or the high-pressure nitrogen source 6 through the second air supply pipe 82, and a third control valve 83 is installed on the second air supply pipe 82; The liquid supply barrel 81 is connected to the liquid inlet pipe 33 via a liquid supply pipe 85 , and a fourth control valve 84 is installed on the liquid supply pipe 85 .

[0045] The present application can be connected with multiple liquid supply barrels. When one liquid supply barrel is used up, another liquid supply barrel can be quickly matched with the docking tank by switching the control valve. Nitrogen is allowed to enter by opening the third control valve to increase the air pressure to prevent the liquid supply barrel from deflation. In actual operation, the third control valve and the fourth control valve corresponding to the liquid supply barrel are opened and closed at the same time.

[0046] Example 3 like Figure 5 As shown, the difference between this embodiment and embodiment 1 or embodiment 2 is that it also includes: A first branch pipe 51, one end of which is connected to the vacuum pipe 42, and the other end of which has a first connecting plate 52, and a first stop valve 53 is installed on the first branch pipe 51; A second branch pipe 54, one end of which is connected to one end of the first connecting pipe 24 close to the input port 11 of the magnetic pump 1, and the other end of which has a second connecting plate 55. A second stop valve 56 is installed on the second branch pipe 54, and the height of the second stop valve 56 is higher than the height of the second liquid level sensor 342; The second connecting tube 57 is a flexible tube. One end of the second connecting tube 57 is detachably connected to the first connecting plate 52 , and the other end of the second connecting tube 57 is detachably connected to the second connecting plate 55 .

[0047] In actual use, it also includes a control unit, which is connected to each sensor and each control valve to control the operation of each control valve. A specific working mode of the magnetic pump liquid supply device: S1. In the initial state (there is no liquid in the first connecting pipe 24), the liquid supply pipe 85 is connected to the liquid supply source, and the two ends of the second connecting pipe 57 are respectively installed on the first connecting plate 52 and the second connecting plate 55. The first stop valve 53 and the second stop valve 56 are opened, and the first control valve 43 and the fourth control valve 84 are opened. The vacuum device 41 works to extract the air in the first connecting pipe 24 and the buffer tank, so that the liquid of the liquid supply source passes through the liquid supply pipe 85 and the liquid inlet pipe 33 and enters the docking tank 3 and flows into the first connecting pipe 24. When the second liquid level sensor 342 is triggered, the vacuum device 41 stops working, and the first stop valve 53, the second stop valve 56 and the first control valve 43 are closed; S2, the magnetic pump 1 works, and the liquid is transported to the supply pipeline 22 through the first pipeline 21. As the magnetic pump 1 works, the liquid level in the docking tank 3 decreases, and the pressure in the docking tank 3 decreases (in a negative pressure state). Under the action of the negative pressure, the liquid from the liquid supply source can be pumped into the docking tank 3, and the liquid is continuously replenished into the docking tank 3. During the operation of the magnetic pump 1, if the liquid level continues to decrease (for example, the magnetic pump 1 is withdrawn too quickly, there is air leakage, etc.), when it decreases to below the position of the second liquid level sensor 342 (the second liquid level sensor 342 is not triggered at this time), the first control valve 43 is opened, and the vacuum device 41 works to further reduce the air pressure in the docking tank 3, so that the liquid from the liquid supply source is accelerated to enter the docking tank 3. When the liquid level in the docking tank 3 continues to rise until the second liquid level sensor 342 is triggered, the first control valve 43 is closed, and the vacuum device 41 is closed; During the operation of the electromagnetic pump, if the liquid level is lower than the position of the first liquid level sensor 341 (the first liquid level sensor 341 is not triggered at this time), the liquid level in the docking tank 3 is too low, the electromagnetic pump stops working, and the control unit alarms; During the operation of the electromagnetic pump, if the fourth liquid level sensor 344 is triggered, the liquid level in the docking tank 3 is too high, the electromagnetic pump stops working, and the control unit alarms.

[0048] In actual use, each control valve can be a solenoid valve or a pneumatic valve.

[0049] The design of the first branch pipe 51, the second branch pipe 54 and the second connecting pipe 57 is to ensure that the liquid can completely enter the second connecting pipe 57, effectively preventing the magnetic pump 1 from running dry. The height of the second stop valve 56 is higher than the height of the second liquid level sensor 342. This arrangement can prevent the liquid in the second branch pipe 54 from being higher than the second stop valve 56 during initial state debugging, so that the second connecting pipe 57 can be removed after the initial state debugging is completed.

[0050] In actual application, the liquid level sensor is a capacitive or photoelectric sensor.

[0051] The above description is only a preferred embodiment of the present invention, and does not limit the patent protection scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention and the drawings, directly or indirectly used in other related technical fields, is also included in the protection scope of the present invention.

Claims

1. A magnetic pump liquid supply device, characterized in that: include: A magnetic pump having an input port and an output port, wherein the output port of the magnetic pump is used to be connected to the supply pipeline through a first pipeline; A docking tank is located above the input port of the magnetic pump, the docking tank has a liquid storage space, the upper end of the liquid storage space has a connecting port, and the liquid storage space also has a baffle assembly, the baffle assembly is located in the area where the connecting port is located, and the baffle assembly is used to prevent the liquid splashed in the liquid storage space from entering the connecting port; A first connecting pipe, one end of which is connected to the lower end of the docking tank, and the other end of which is connected to the input port of the magnetic pump; A liquid inlet pipe, one end of which is connected to the docking tank, the connection point between the liquid inlet pipe and the docking tank is located in the upper area of ​​the liquid storage space and away from the connecting port, and the other end of the liquid inlet pipe is used to connect to a liquid supply source through a liquid supply pipe; A vacuum pumping device connected to the connecting port via a vacuum pumping pipe, wherein a first control valve is installed on the vacuum pumping pipe; The liquid level sensor is arranged on the docking tank and is used to detect the liquid level of the liquid in the docking tank.

2. The magnetic pump liquid supply device according to claim 1, characterized in that: The connection port is located on the top wall of the docking tank, and the baffle assembly includes: A first baffle, the upper end of which is fixed to the top wall of the docking tank, and the lower end of which extends to a side away from the liquid inlet pipe, the first baffle having a first surface and a second surface, wherein the second surface faces away from the liquid inlet pipe; A second baffle, the upper end of which is fixed to the top wall or the side wall of the docking tank, the lower end of which faces the second surface of the first baffle, a first gas inlet is formed between the second baffle and the second surface, and the connection port is within the space enclosed by the first baffle and the second baffle; The third baffle is located in the space surrounded by the first baffle and the second baffle. The lower end of the third baffle is fixed to the second surface, and the upper end extends toward the upper end of the second baffle. A second gas inlet is formed between the upper end of the third baffle and the second baffle.

3. The magnetic pump liquid supply device according to claim 2, characterized in that: The second baffle plate and the third baffle plate are arranged in parallel.

4. The magnetic pump liquid supply device according to claim 1, characterized in that: There are at least four liquid level sensors, which are, from bottom to top, a first liquid level sensor, a second liquid level sensor, a third liquid level sensor, and a fourth liquid level sensor. The fourth liquid level sensor is located below the baffle assembly.

5. The magnetic pump liquid supply device according to claim 4, characterized in that: Also includes: a first branch pipe, one end of which is connected to the vacuum pipe and the other end of which has a first connection plate, and a first stop valve is installed on the first branch pipe; A second branch pipe, one end of which is connected to one end of the first connecting pipe close to the input port of the magnetic pump, and the other end of which has a second connecting plate, a second stop valve is installed on the second branch pipe, and the height of the second stop valve is higher than the height of the second liquid level sensor; The second connecting tube is a flexible tube, one end of which is detachably connected to the first connecting disk, and the other end of which is detachably connected to the second connecting disk.

6. The magnetic pump liquid supply device according to claim 1, characterized in that: The vacuum pump is a vacuum pump.

7. The magnetic pump liquid supply device according to claim 1, characterized in that: The vacuum pumping device is a Venturi vacuum generating device, which has a high-pressure gas access end, a vacuum pumping end and an exhaust end. The vacuum pumping tube is connected to the vacuum pumping end. The high-pressure gas access end is used to connect to a high-pressure nitrogen source through a second pipeline. A sixth control valve is installed on the second pipeline. The magnetic pump liquid supply device also includes: A first gas supply pipe, one end of which is connected to the connection port or the vacuum pipe, and the other end of which is used to be connected to the high-pressure nitrogen source; The second control valve is installed on the first air supply pipe.

8. The magnetic pump liquid supply device according to claim 7, characterized in that: The liquid supply source is a plurality of liquid supply barrels; The liquid supply tank is connected to the first gas supply pipe or the high-pressure nitrogen source through a second gas supply pipe, and a third control valve is installed on the second gas supply pipe; The liquid supply barrel is connected to the liquid inlet pipe through a liquid supply pipe, and a fourth control valve is installed on the liquid supply pipe.

9. The magnetic pump liquid supply device according to claim 1, characterized in that: The magnetic pump is fixed to the lower end of the docking tank.

10. The magnetic pump liquid supply device according to claim 1, characterized in that: A fifth control valve is installed on the first pipeline.

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