A magnetic pump liquid supply device

Abstract

The present application discloses a liquid supply device for a magnetic pump, comprising: a magnetic pump having an input port and an output port; a docking tank located above the input port of the magnetic pump, the upper end of the liquid storage space of the docking tank having a connection port, and a baffle assembly located in the area where the connection port is located; a first connecting pipe connecting the docking tank and the input port of the magnetic pump; a liquid inlet pipe connected to the docking tank, the connection point being located in the upper region of the liquid storage space and on the side far from the connection port; a vacuum pumping device connected to the connection port; and a liquid level sensor for detecting the liquid level in the docking tank. The present application solves the problems of the suction force and dry running 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 of the liquid inlet pipe and the docking tank on the side far from the connection port, and arranging a baffle assembly in the area where the connection port is located, it can effectively prevent the sputtered liquid from entering the connection port when the vacuum pumping device works.

Description

Technical Field

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

[0002] The characteristics of existing magnetic pumps are poor suction ability. Suction can only be formed when liquid enters the pump inlet. In addition, magnetic pumps for transporting chemical liquids cannot run dry without medium, and running dry without medium will quickly damage some impellers of the pump. Currently, magnetic pumps can only be used to pump liquids in storage tanks. For chemical liquids in barrels and tank trucks, pneumatic pumps are used for transportation. However, compared with magnetic pumps, pneumatic pumps have higher costs. Summary of the Invention

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

[0004] The technical solution adopted by the present invention is as follows:

[0005] A liquid supply device for a magnetic pump includes:

[0006] A magnetic pump having an input port and an output port. The output port of the magnetic pump is used to be connected to a supply pipeline through a first pipeline;

[0007] A docking tank 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 connection port. The liquid storage space also has a baffle assembly. The baffle assembly is located in the area where the connection port is located. The baffle assembly is used to prevent the splashed liquid in the liquid storage space from entering the connection port;

[0008] A first connecting pipe, one end of which is connected to the lower end of the docking tank, and the other end is connected to the input port of the magnetic pump;

[0009] A liquid inlet pipe, one end of which is connected to the docking tank. The connection point of the liquid inlet pipe and the docking tank is located in the upper region of the liquid storage space and on the side far from the connection port. The other end of the liquid inlet pipe is used to be connected to a liquid supply source through a liquid supply pipe;

[0010] A vacuum pumping device is connected to the connection port through a vacuum pumping pipe. A first control valve is installed on the vacuum pumping pipe;

[0011] A liquid level sensor is arranged on the docking tank and is used to detect the liquid level of the liquid in the docking tank.

[0012] This application can;

[0013] Working principle of this application: Before the magnetic pump works, ensure that there is liquid in the docking tank. If there is no liquid in the docking tank, the first control valve and the vacuum pumping device can be opened to pump vacuum, reducing the air pressure in the docking tank and sucking 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 the negative pressure, the liquid from the liquid supply source can be pumped into the docking tank to continuously supplement the liquid in the docking tank. The liquid level sensor can detect the liquid level in the docking tank. When the liquid level is too low, the first control valve and the vacuum pumping device can be opened to pump vacuum, further reducing the air pressure in the docking tank and accelerating the entry of the liquid from the liquid supply source into 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.

[0014] This application solves the problems of the suction force and dry running of the magnetic pump by setting 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 and work normally); by setting the connection point of the liquid inlet pipe and the docking tank on the side far from the connection port, and setting a baffle assembly in the area where the connection port is located, it can effectively prevent the sputtered liquid from entering the connection port when the vacuum pumping device is working.

[0015] In this application, the liquid supply source can be a liquid supply bucket or a tank truck.

[0016] 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:

[0017] The first baffle, with the upper end fixed to the top wall of the docking tank and the lower end extending towards the side away from the liquid inlet pipe. The first baffle has a first surface and a second surface, and the second surface faces away from the liquid inlet pipe.

[0018] The second baffle, with the upper end fixed to the top wall or the side wall of the docking tank and the lower end facing 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.

[0019] The third baffle is located within the space enclosed 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 towards the upper end side of the second baffle. A second gas inlet is formed between the upper end of the third baffle and the second baffle.

[0020] The lower ends of the first baffle and the second baffle are both inclined downward. Most of the liquid sputtered onto the first surface and the second baffle will fall. Even if a small part enters the first gas inlet, it 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 very 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) and enter the second gas inlet. Therefore, the liquid will not enter the connection port, and the baffle assembly of the present application can effectively prevent the liquid from entering the vacuum extraction pipe.

[0021] In one embodiment of the present invention, the second baffle and the third baffle are arranged in parallel.

[0022] In one embodiment of the present invention, there are at least four liquid level sensors, which are the first liquid level sensor, the second liquid level sensor, the third liquid level sensor and the fourth liquid level sensor in sequence from bottom to top. The fourth liquid level sensor is located below the baffle assembly.

[0023] In one embodiment of the present invention, it further includes:

[0024] The first sub-pipe, one end of which is connected to the vacuum extraction pipe and the other end has a first connection disk. A first stop valve is installed on the first sub-pipe;

[0025] The second sub-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 has a second connection disk. A second stop valve is installed on the second sub-pipe, and the height of the second stop valve is higher than the height of the second liquid level sensor;

[0026] The second connecting pipe is a flexible pipe. One end of the second connecting pipe is detachably connected to the first connection disk and the other end is detachably connected to the second connection disk.

[0027] In actual operation, it further includes a control unit, which is connected to each sensor and each control valve and is used to control the operation of each control valve. A specific working mode of the magnetic pump liquid supply device:

[0028] S1. In the initial state (there is no liquid in the first connecting pipe), connect the liquid supply pipe to the liquid supply source, install the two ends of the second connecting pipe on the first connection disk and the second connection disk respectively, open the first stop valve and the second stop valve, open the first control valve and the fourth control valve, and the vacuum extraction device works to extract the air in the first connecting pipe and the buffer tank, so that the liquid from the liquid supply source passes through the liquid supply pipe and the liquid inlet pipe and then enters the docking tank and flows into the first connecting pipe. When the second liquid level sensor is triggered, the vacuum extraction device stops working, and the first stop valve, the second stop valve and the first control valve are closed;

[0029] S2. The magnetic pump operates to transport the liquid through the first pipeline to the supply pipeline. As the magnetic pump operates, 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 to continuously replenish the liquid in the docking tank. During the operation of the magnetic pump, if the liquid level continuously decreases (such as when the pumping speed of the magnetic pump is too fast or there is air leakage), when it drops below the position of the second liquid level sensor (at this time, the second liquid level sensor is not triggered), the first control valve is opened, and the vacuum pumping device operates to further reduce the air pressure in the docking tank, so that the liquid from the liquid supply source accelerates into the docking tank. When the liquid level in the docking tank continuously rises until the second liquid level sensor is triggered, the first control valve is closed, and the vacuum pumping device is closed;

[0030] During the operation of the electromagnetic pump, if the liquid level is lower than the position of the first liquid level sensor (at this time, the first liquid level sensor is not triggered), the liquid level in the docking tank is too low, and the electromagnetic pump stops working, and the control unit alarms;

[0031] During the operation of the electromagnetic pump, if the fourth liquid level sensor is triggered, the liquid level in the docking tank is too high, and the electromagnetic pump stops working, and the control unit alarms.

[0032] In actual application, each control valve can be an electromagnetic valve or a pneumatic valve.

[0033] 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 and effectively prevent the magnetic pump from dry running. The height of the second stop valve is higher than the height of the second liquid level sensor. Such a setting can prevent the liquid in the second branch pipe from being higher than the second stop valve during the initial state debugging. After the initial state debugging is completed, the second connecting pipe can be removed.

[0034] In actual application, the liquid level sensor is a capacitive or photoelectric sensor.

[0035] In one embodiment of the present invention, the vacuum pumping device is a vacuum pump.

[0036] In one embodiment of the present invention, the vacuum pumping device is a Venturi vacuum generating device. The Venturi vacuum generating device has a high-pressure gas access end, a vacuum pumping end and an exhaust end. The vacuum pumping pipe is connected to the vacuum pumping end. The high-pressure gas access end is used to be connected 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 further includes:

[0037] A first gas supply pipe, one end of which is connected to the connection port or the vacuum pumping pipe, and the other end is used to be connected to the high-pressure nitrogen source;

[0038] A second control valve, which is installed on the first gas supply pipe.

[0039] The vacuum degree that a magnetic pump can form is limited. When the liquid supply source stops supplying liquid (for example, when the inlet pipe is in a closed state and no new liquid flows in), as the magnetic pump operates, the liquid in the docking tank is gradually pumped out. When the pumping causes the docking tank to reach a certain vacuum degree, the magnetic pump can no longer pump out the remaining liquid. In this application, by setting the first gas supply pipe and the second control valve, nitrogen can be supplemented into the docking tank in this situation, thereby increasing the air pressure in the docking tank and enabling the magnetic pump to transport the remaining liquid in the docking tank to the supply pipeline.

[0040] In one embodiment of the present invention, the liquid supply source is a plurality of liquid supply barrels;

[0041] The liquid supply barrel is connected to the first gas supply pipe or a high-pressure nitrogen source through a second gas supply pipe, and a third control valve is installed on the second gas supply pipe;

[0042] The liquid supply barrel is connected to the inlet pipe through a liquid supply pipe, and a fourth control valve is installed on the liquid supply pipe.

[0043] This application can be connected to a plurality of liquid supply barrels. When one liquid supply barrel is used up, another liquid supply barrel can be quickly coordinated with the docking tank by switching the control valve. By opening the third control valve, nitrogen enters to increase the air pressure and prevent the liquid supply barrel from collapsing. During actual operation, the third control valve and the fourth control valve corresponding to the liquid supply barrel are opened and closed simultaneously.

[0044] In one embodiment of the present invention, the magnetic pump is fixed at the lower end of the docking tank.

[0045] In one embodiment of the present invention, a fifth control valve is installed on the first pipeline.

[0046] The beneficial effects of the present invention are as follows: This application solves the problems of the suction force and dry running of the magnetic pump by setting a docking tank above the input port of the magnetic pump and a vacuum pumping device connected to the docking tank; by setting the connection point of the inlet pipe and the docking tank on the side far from the connection port, and setting a baffle assembly in the area where the connection port is located, it can effectively prevent the sputtered liquid from entering the connection port when the vacuum pumping device is working. Brief Description of the Drawings

[0047] Figure 1 is a schematic diagram of a magnetic pump liquid supply device in Embodiment 1;

[0048] Figure 2 is a partial cross-sectional view of the docking tank;

[0049] Figure 3 is a schematic diagram of a magnetic pump liquid supply device in Embodiment 2;

[0050] Figure 4It is a schematic diagram of a magnetic pump liquid supply device connected to two liquid supply barrels;

[0051] Figure 5 It is a schematic diagram of the magnetic pump liquid supply device of Embodiment 3.

[0052] Each reference numeral in the figure is as follows:

[0053] 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. Connection 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 pumping device; 411. High-pressure gas access end; 412. Vacuum pumping end; 413. Exhaust end; 42. Vacuum pumping pipe; 43. First control valve; 44. Second pipeline; 45. Sixth control valve; 51. First branch pipe; 52. First connection disk; 53. First stop valve; 54. Second branch pipe; 55. Second connection disk; 56. Second stop valve; 57. Second connecting pipe; 6. High-pressure nitrogen source; 71. First gas supply pipe; 72. Second control valve; 81. Liquid supply barrel; 82. Second gas supply pipe; 83. Third control valve; 84. Fourth control valve; 85. Liquid supply pipe. Detailed implementation manners

[0054] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0055] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this application is usually placed when in use. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, terms such as "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0056] In the description of the present application, it should also be noted that unless otherwise clearly specified and defined, the terms "arrangement" and "connection" 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0057] The present invention will be described in detail below with reference to the accompanying drawings.

[0058] Embodiment 1

[0059] As Figure 1 and 2 shown, a magnetic pump liquid supply device includes:

[0060] A magnetic pump 1 having an input port 11 and an output port 12, and the output port 12 of the magnetic pump 1 is used to be connected to a supply pipeline 22 through a first pipeline 21;

[0061] A 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 connection port 311. The liquid storage space 31 also has a baffle assembly 32. The baffle assembly 32 is located in the area where the connection port 311 is located, and the baffle assembly 32 is used to prevent the sputtered liquid in the liquid storage space 31 from entering the connection port 311;

[0062] A first connecting pipe 24 has one end connected to the lower end of the docking tank 3 and the other end connected to the input port 11 of the magnetic pump 1;

[0063] A liquid inlet pipe 33 has one end connected to the docking tank 3. The connection point of the liquid inlet pipe 33 and the docking tank 3 is located in the upper region of the liquid storage space 31 and on the side far from the connection port 311. The other end of the liquid inlet pipe 33 is used to be connected to a liquid supply source through a liquid supply pipe 85;

[0064] A vacuum pumping device 41 is connected to the connection port 311 through a vacuum pumping pipe 42, and a first control valve 43 is installed on the vacuum pumping pipe 42;

[0065] A 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.

[0066] In the present application, by arranging the docking tank 3 above the input port 11 of the magnetic pump 1, it is possible to;

[0067] Working principle of this application: Before the magnetic pump 1 works, ensure 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 pumping device 41 can be opened to pump vacuum, so that the air pressure in the docking tank 3 becomes lower, and the liquid is sucked from the liquid supply source into the docking tank 3; 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 decreases, 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 to continuously supplement the docking tank 3; the liquid level sensor can detect the liquid level in the docking tank 3. When the liquid level is too low, the first control valve 43 and the vacuum pumping device 41 can be opened to pump vacuum, so that the air pressure in the docking tank 3 is further reduced, and the liquid from the liquid supply source can enter the docking tank 3 more quickly. When the liquid level is lower than the minimum value, it means that there is a problem with the device, and the magnetic pump 1 stops working.

[0068] This application solves the suction and dry running problems of the magnetic pump 1 by arranging a docking tank 3 above the inlet 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 liquid and work normally); by setting the connection point of the liquid inlet pipe 33 and the docking tank 3 on the side far 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 sputtered liquid from entering the connection port 311 when the vacuum pumping device 41 works.

[0069] In this application, the liquid supply source can be a liquid supply bucket 81 or a tank truck.

[0070] As Figure 2 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:

[0071] The first baffle 321, the upper end of which is fixed to the top wall of the docking tank 3, and the lower end extends to the side far 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;

[0072] The second baffle 322, the upper end of which is fixed to the top wall or the side wall of the docking tank 3, and the lower end faces 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, and the connection port 311 is within the space surrounded by the first baffle 321 and the second baffle 322;

[0073] The third baffle 323 is located within the space enclosed by the first baffle 321 and the second baffle 322. The lower end of the third baffle 323 is fixed to the second surface 3212, and the upper end extends towards the upper end side of the second baffle 322. A second gas inlet 325 is formed between the upper end of the third baffle 323 and the second baffle 322.

[0074] The lower ends of the first baffle 321 and the second baffle 322 are both inclined downward. Most of the liquid sputtered onto the first surface and the second baffle 322 will fall. 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 its own gravity and it is very difficult to enter the second gas inlet 325 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). Therefore, the liquid will not enter the connection port 311, and the baffle assembly 32 of the present application can effectively prevent the liquid from entering the evacuation tube 42.

[0075] As Figure 2 shown, in this embodiment, the second baffle 322 and the third baffle 323 are arranged in parallel.

[0076] As Figure 1 shown, in this embodiment, there are at least four liquid level sensors, which are the first liquid level sensor 341, the second liquid level sensor 342, the third liquid level sensor 343, and the fourth liquid level sensor 344 in sequence from bottom to top. The fourth liquid level sensor 344 is located below the baffle assembly 32.

[0077] As Figure 1 shown, in this embodiment, the evacuation device 41 is a vacuum pump.

[0078] During actual operation, the magnetic pump 1 is fixed to the lower end of the docking tank 3.

[0079] In this embodiment, a fifth control valve 23 is installed on the first pipeline 21.

[0080] Embodiment 2

[0081] As Figure 3 shown, the difference between this embodiment and Embodiment 1 is that the evacuation device 41 is a Venturi vacuum generating device. The Venturi vacuum generating device has a high-pressure gas access end 411, an evacuation end 412, and an exhaust end 413. The evacuation tube 42 is connected to the evacuation 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 a sixth control valve 45 is installed on the second pipeline 44. The magnetic pump liquid supply device of this embodiment further includes:

[0082] The first supply gas pipe 71 has one end connected to the connection port 311 or the vacuum extraction pipe 42, and the other end is used to connect to the high-pressure nitrogen source 6;

[0083] The second control valve 72 is installed on the first supply gas pipe 71.

[0084] The vacuum degree that the magnetic pump can form is limited. When the liquid supply source stops supplying liquid (for example, when the inlet pipe is in a closed state and no new liquid flows in), as the magnetic pump operates, the liquid in the docking tank is gradually extracted. When the extraction causes the docking tank to reach a certain vacuum degree, at this time, the magnetic pump can no longer extract the remaining liquid. In this application, by setting the first supply gas pipe and the second control valve, nitrogen can be supplemented into the docking tank in this situation, 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.

[0085] In actual operation, the liquid supply source can be a tank truck or a liquid supply barrel 81. As Figure 4 shown, when the liquid supply source is also a liquid supply barrel 81, there can be multiple liquid supply barrels 81;

[0086] The liquid supply barrel 81 is connected to the first supply gas pipe 71 or the high-pressure nitrogen source 6 through the second supply gas pipe 82, and a third control valve 83 is installed on the second supply gas pipe 82;

[0087] The liquid supply barrel 81 is connected to the inlet pipe 33 through the liquid supply pipe 85, and a fourth control valve 84 is installed on the liquid supply pipe 85.

[0088] This application can be connected to multiple liquid supply barrels. When one liquid supply barrel is used up, another liquid supply barrel can be quickly made to cooperate with the docking tank by switching the control valve. By opening the third control valve, nitrogen enters to increase the air pressure and prevent the liquid supply barrel from collapsing. During actual operation, the third control valve and the fourth control valve corresponding to the liquid supply barrel are opened and closed simultaneously.

[0089] Embodiment 3

[0090] As Figure 5 shown, the difference between this embodiment and Embodiment 1 or Embodiment 2 is that it further includes:

[0091] The first branch pipe 51 has one end connected to the vacuum extraction pipe 42 and the other end has a first connection disk 52, and a first stop valve 53 is installed on the first branch pipe 51;

[0092] The second branch pipe 54 has one end 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 has a second connection disk 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;

[0093] The second connecting pipe 57 is a flexible pipe. One end of the second connecting pipe 57 is detachably connected to the first connecting disk 52, and the other end is detachably connected to the second connecting disk 55.

[0094] In actual operation, it also includes a control unit. The control unit is connected to each sensor and each control valve and is used to control the operation of each control valve. A specific working mode of the magnetic pump liquid supply device:

[0095] S1. In the initial state (there is no liquid in the first connecting pipe 24), connect the liquid supply pipe 85 to the liquid supply source, install both ends of the second connecting pipe 57 on the first connecting disk 52 and the second connecting disk 55 respectively, open the first stop valve 53 and the second stop valve 56, open the first control valve 43 and the fourth control valve 84, and 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 then 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;

[0096] S2. The magnetic pump 1 works to transport the liquid through the first pipeline 21 to the supply pipeline 22. 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 of the liquid supply source can be pumped into the docking tank 3 to continuously supplement the liquid in the docking tank 3; during the operation of the magnetic pump 1, if the liquid level continuously decreases (such as the pumping speed of the magnetic pump 1 is too fast, there is air leakage, etc.), when it drops below the position of the second liquid level sensor 342 (at this time the second liquid level sensor 342 is not triggered), open the first control valve 43, and the vacuum device 41 works to further reduce the air pressure in the docking tank 3, so that the liquid of the liquid supply source accelerates into the docking tank 3. When the liquid level in the docking tank 3 continuously rises until the second liquid level sensor 342 is triggered, the first control valve 43 is closed and the vacuum device 41 is closed;

[0097] During the operation of the electromagnetic pump, if the liquid level is lower than the position of the first liquid level sensor 341 (at this time the first liquid level sensor 341 is not triggered), the liquid level in the docking tank 3 is too low, and the electromagnetic pump stops working, and the control unit alarms;

[0098] 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, and the electromagnetic pump stops working, and the control unit alarms.

[0099] In actual operation, each control valve can be an electromagnetic valve or a pneumatic valve.

[0100] The designs of the first branch pipe 51, the second branch pipe 54 and the second connecting pipe 57 are to ensure that the liquid can completely enter the second connecting pipe 57, effectively preventing the magnetic pump 1 from dry running. The height of the second stop valve 56 is higher than that of the second liquid level sensor 342. Such a setting can prevent the liquid in the second branch pipe 54 from exceeding the second stop valve 56 during the initial state debugging, so that the second connecting pipe 57 can be removed after the initial state debugging is completed.

[0101] In actual application, the liquid level sensor is a capacitive or photoelectric sensor.

[0102] The above are only the preferred embodiments of the present invention, and thus do not limit the patent protection scope of the present invention. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention, directly or indirectly applied in other related technical fields, shall be similarly 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; A liquid level sensor is arranged on the docking tank and is used to detect the liquid level of the liquid in the docking tank; 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.

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 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.

8. 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.

9. 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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