Leakage-stopping metering pump

Abstract

According to the leak-proof metering pump, a leak-proof mechanism is additionally arranged on the structure of the metering pump, a special upper cover sealing convex edge and a plug are designed to abut against an upper sealing gasket of the leak-proof mechanism, and the precision of the metering pump is not affected while leakage prevention is achieved; meanwhile, the liquid in the water outlet hole is tangent to the outermost rotating ring of the rotor through the steering of the right-angle through hole, so that the rotor is more sensitive to rotate, and the metering is more accurate; the magnet is arranged in the center of the rotor rotating shaft, interference of magnet rotating inertia force on rotor rotation is reduced, and metering is more accurate; the upper shaft and the lower shaft of the rotor are conical, do not need to penetrate through an upper cover and a metering mounting box, and are small in friction force, smooth in rotor rotation, long in service life and higher in metering precision.

Description

Technical Field

[0001] The present invention relates to the technical field of pump equipment, and more specifically, mainly relates to a leak-proof metering pump. Background Art

[0002] When the liquid level at the inlet of the existing metering motor pump on the market is higher than the outlet of the motor pump, as the difference between the inlet liquid level and the outlet of the discharge end increases, the liquid will flow out of the motor pump outlet due to gravity. The greater the vertical distance between the inlet liquid level and the outlet, the greater the amount of liquid flowing out of the outlet. When the appliance is not in use, the liquid in the liquid storage tank of the appliance may leak into or outside the appliance, causing liquid to enter the storage area and related equipment, posing a safety hazard. Therefore, it is necessary to further improve the structure of the metering pump. Summary of the invention

[0003] The purpose of the present invention is to provide a leak-proof metering pump in view of the above-mentioned shortcomings, so as to solve the technical problems in the prior art that metering pumps cannot be leak-proof.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The present invention provides a leak-proof metering pump, comprising a base, a motor fixed on the lower side of the base, a crank transmission mechanism connected to the motor power, a pumping mechanism fixed on the upper side of the base and connected to the crank transmission mechanism power, a coupling sealed and fixedly sleeved on the upper side of the pumping mechanism, a leak-proof mechanism being sealed and connected to an upper cover after the upper side of the coupling is sealed, a water outlet hole is provided at the center of the upper cover, the upper side of the water outlet hole is connected to a water outlet pipe through a metering component, and a water inlet hole is provided on the side of the center of the upper cover to communicate with the water inlet pipe on the upper side of the upper cover. The outer side of the water inlet hole is provided with a first sealing convex edge which presses against the outer circle of the water inlet channel of the leak-proof mechanism and is directly and tightly connected with the water inlet channel of the leak-proof mechanism; a water outlet groove is provided on the side of the water outlet hole of the upper cover; the water outlet hole and the water outlet groove are connected through a plug; the outer side of the water outlet hole and the convex edge of the bottom of the plug are surrounded by a second sealing convex edge which presses against the upper side of the leak-proof mechanism and is sealed; the outer side of the water outlet groove and the convex edge of the bottom of the plug are surrounded by a third sealing convex edge which presses against the outer circle of the water outlet channel of the leak-proof mechanism and is directly and tightly connected with the water outlet channel of the leak-proof mechanism.

[0006] Furthermore, the metering assembly includes a steering boss arranged at the center of the upper side of the upper cover, and a metering installation box arranged on the outer side of the steering boss is covered by an upper sealing ring; the outer side of the upper end of the metering installation box is fixedly connected to and communicated with the water outlet pipe, and a right-angle through hole is arranged in the steering boss to communicate with the water outlet hole of the upper cover, and a rotor mounting platform is arranged in front of the upper outlet of the right-angle through hole of the steering boss, and a rotor is rotatably arranged between the rotor mounting platform and the metering installation box, a magnet is arranged on the rotor, and a fan blade perpendicular to the upper outlet direction of the right-angle through hole is arranged on the side of the rotor, and a Hall sensor PCB board is arranged on the outer side of the metering installation box, and the Hall sensor PCB board is located on the side of the rotor.

[0007] Furthermore, the outlet direction of the upper side of the right-angle through hole is tangent to the outermost rotation circle of the rotor.

[0008] Furthermore, the magnet is arranged at the center of the rotor shaft.

[0009] Furthermore, the rotor is provided with tapered shafts at the top and bottom, and the rotor mounting platform and the inner side of the metering mounting box are provided with tapered holes corresponding to the tapered shafts.

[0010] Furthermore, the included angle between two side waistlines on the side surfaces of the tapered hole is 50°.

[0011] Furthermore, the anti-leakage mechanism includes a spring, a movable sealing gasket, a diverter plate, and an upper sealing gasket;

[0012] The movable sealing gasket is provided with an annular sealing boss, a liquid outlet hole 1, and a liquid inlet hole 1, wherein the position of the liquid outlet hole 1 is directly opposite to the position of the liquid outlet channel of the connector, and the position of the liquid inlet hole 1 is directly opposite to the position of the liquid inlet channel of the connector;

[0013] The diverter disc is provided with a sealing concave platform facing the annular sealing boss, a second liquid outlet hole is provided at the center of the sealing concave platform of the diverter disc, the diverter disc is provided with a second liquid inlet hole facing the first liquid inlet hole, the diverter disc is provided with a third liquid outlet hole facing the first liquid outlet hole, the third liquid outlet hole is connected with the annular edge of the sealing concave platform on the other side close to the movable sealing gasket and is provided with a guide hole facing the annular sealing boss downward, the third liquid outlet hole is connected with the liquid outlet channel of the connector through the first liquid outlet hole, and the third liquid outlet hole is connected with the second liquid outlet hole through the guide hole;

[0014] The upper sealing gasket is provided with a third liquid inlet hole facing the second liquid inlet hole, and the upper sealing gasket is provided with a fourth liquid outlet hole facing the second liquid outlet hole;

[0015] The movable sealing gasket is movably arranged between the lower side of the diverter plate and the upper side of the connector by a spring against the center of the annular sealing boss, and the upper sealing gasket is pressed by the upper cover to be tightly attached to the upper side of the diverter plate;

[0016] The upper cover water inlet pipe is connected to the liquid inlet channel on the connector through the opposite liquid inlet hole three, liquid inlet hole two, and liquid inlet hole one in sequence, and the upper cover water outlet pipe is connected to the liquid outlet channel on the connector through the metering component, liquid outlet hole four, liquid outlet hole two, the guide hole, liquid outlet hole three, and liquid outlet hole one in sequence.

[0017] Furthermore, the crank transmission mechanism includes a crank, a shaft, and a connecting rod. The crank is fixed on the motor power shaft to achieve power connection. The connecting rod is fixedly connected to the crank through the shaft. The connecting rod is a three-blade sheet structure. The blades are provided with connecting holes and are facing the pumping mechanism. The connecting rod blades are power connected to the pumping mechanism to provide power.

[0018] Furthermore, the pumping mechanism is an umbrella membrane pumping mechanism, including a diaphragm, a diaphragm bracket, a small umbrella valve, a valve bracket, a large umbrella valve, an outer ring sealing ring, and an inner ring sealing ring. The diaphragm is a three-legged structure corresponding to three membrane chambers. The three legs of the diaphragm are dynamically connected to the crank transmission mechanism. The diaphragm bracket presses the diaphragm and is fixed to the upper side of the base. The small umbrella valve has three movably fixed on the valve bracket and seals the three membrane chambers of the diaphragm. The valve bracket is fixed to the upper side of the diaphragm bracket. An upward channel is set in the center of the valve bracket. The large umbrella valve is movably set in the middle of the connector and the lower side seals the central channel of the valve bracket. The upper side of the valve bracket clamps the outer ring sealing ring and the inner ring sealing ring, which are respectively pressed against the outer ring and inner ring on the lower side of the connector and fixedly connected.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: a leak-proof mechanism is added to the structure of the metering pump, and a special upper cover sealing ridge and a plug are designed to resist the upper sealing gasket of the leak-proof mechanism, so as to achieve leak-proofness without affecting the accuracy of the metering pump; at the same time, the liquid in the water outlet is turned through a right-angle through hole to be tangent to the outermost rotating circle of the rotor, so that the rotor rotation and start-up rotation are more sensitive and the metering is more precise; the magnet is set at the center of the rotor shaft to reduce the interference of the magnet's rotating inertia force on the rotor rotation, so that the metering is more accurate; the upper and lower shafts of the rotor are tapered in design, and there is no need to penetrate the upper cover and the metering installation box, so the friction is small, the rotor rotates smoothly, the service life is long, and the metering accuracy is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the disassembly of a leak-proof metering pump in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the upper cover structure in an embodiment of the present invention;

[0022] Figure 3 Schematic diagram of the anti-leakage mechanism structure in an embodiment of the present invention.

[0023] The following are the descriptions of the reference numerals:

[0024] 1 is the base, 2 is the motor, 3 is the crank transmission mechanism, 31 is the crank, 32 is the shaft, 33 is the connecting rod,

[0025] 4 is a pumping mechanism, 41 is a diaphragm, 42 is a diaphragm bracket, 43 is a small umbrella valve, 44 is a valve bracket, 45 is a large umbrella valve, 46 is an outer ring seal, 47 is an inner ring seal, 48 is a channel, 5 is a connector, 51 is a liquid outlet channel, 52 is a liquid inlet channel, 6 is a leak-proof mechanism, 61 is a spring, 62 is a movable sealing pad, 621 is an annular sealing boss, 622 is a liquid outlet hole 1, 623 is a liquid inlet hole 1, 63 is a diverter plate, 631 is a sealing concave platform, 632 is a liquid outlet hole 2, 633 is a liquid inlet hole 2, 634 is a liquid outlet hole 3, 635 is a liquid outlet hole 4, 636 is a liquid outlet hole 5, 637 is a liquid outlet hole 6, 638 is a liquid outlet hole 7, 639 is a liquid outlet hole 8, 640 is a liquid outlet hole 9, 641 is a liquid outlet hole 10, 642 is a liquid outlet hole 11, 643 is a liquid outlet hole 12, 644 is a liquid outlet hole 13, 645 is a liquid outlet hole 14, 646 is a liquid outlet hole 15, 647 is a liquid outlet hole 16, 648 is a liquid outlet hole 17, 649 is a liquid outlet hole 18, 650 is a liquid outlet hole 19, 651 is a liquid outlet hole 20, 652 is a liquid outlet hole 21, 653 is a liquid outlet hole 22, 654 is a liquid outlet hole 3 is a guide hole, 64 is an upper sealing gasket, 641 is a liquid inlet hole three, 642 is a liquid outlet hole four, 7 is an upper cover, 71 is a water outlet hole, 72 is a water inlet hole, 73 is a first sealing ridge, 74 is a water outlet groove, 75 is a plug, 76 is a second sealing ridge, 77 is a third sealing ridge, 8 is a metering component, 81 is a steering boss, 82 is an upper sealing ring, 83 is a metering installation box, 84 is a right-angle through hole, 85 is a rotor mounting platform, 86 is a rotor, 87 is a Hall sensor PCB board, 88 is a tapered shaft, 89 is a tapered hole, 9 is a water outlet pipe, and 10 is a water inlet pipe. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] refer to Figure 1 and Figure 2 As shown, an embodiment of the present invention is a leak-proof metering pump, comprising a base 1, a motor 2 fixed to the lower side of the base 1, a crank transmission mechanism 3 connected to the motor 2, a pumping mechanism 4 fixed to the upper side of the base 1 and connected to the crank transmission mechanism 3, and a connector 5 sealed and fixedly sleeved on the upper side of the pumping mechanism 4. It is important that a leak-proof mechanism 6 is sealedly arranged on the upper side of the connector 5 and is sealed and connected to an upper cover 7. A water outlet 71 is arranged at the center of the upper cover 7. The upper side of the water outlet 71 is connected to a water outlet pipe 9 through a metering component 8. A water inlet 72 is arranged on the side of the center of the upper cover 7 to connect to the water inlet on the upper side of the upper cover 7. The outer side of the water inlet hole 72 is provided with a first sealing convex edge 73 which abuts against the outer circle of the water inlet channel of the leak-proof mechanism 6 and is directly and tightly connected with the water inlet channel of the leak-proof mechanism 6; the side of the water outlet hole 71 of the upper cover 7 is provided with a water outlet groove 74; the water outlet hole 71 and the water outlet groove 74 are connected through a plug 75; the outer side of the water outlet hole 71 and the convex edge of the bottom of the plug 75 are surrounded by a second sealing convex edge 76 which abuts against the upper side of the leak-proof mechanism 6 and is sealed; the outer side of the water outlet groove 74 and the convex edge of the bottom of the plug 75 are surrounded by a third sealing convex edge 77 which abuts against the outer circle of the water outlet channel of the leak-proof mechanism 6 and is directly and tightly connected with the water outlet channel of the leak-proof mechanism 6;

[0028] The main points of the present invention are to add a leak-proof mechanism 6 to the structure of the metering pump, design a special upper cover 7 with a sealing convex edge and a plug 75 to abut against the upper side of the leak-proof mechanism 6, so as to achieve leak-proof without affecting the accuracy of the metering pump.

[0029] In some embodiments, reference Figure 1 As shown, the metering assembly 8 includes a steering boss 81 arranged at the center of the upper side of the upper cover 7, and a metering installation box 83 arranged on the outer side of the steering boss 81 is covered by an upper sealing ring 82; the outer side of the upper end of the metering installation box 83 is fixedly connected and communicated with the water outlet pipe 9, and a right-angle through hole 84 is arranged in the steering boss 81 to communicate with the water outlet hole 71 of the upper cover 7, and a rotor mounting platform 85 is arranged in front of the upper outlet of the right-angle through hole 84 of the steering boss 81, and a rotor 86 is rotatably arranged between the rotor mounting platform 85 and the metering installation box 83, and a magnet is arranged on the rotor 86, and the side of the rotor 86 The fan blades are provided with the upper outlet direction of the vertical right-angle through hole 84, and the outer side of the metering installation box 83 is provided with a Hall sensor PCB board 87, which is located on the side of the rotor 86. This metering structure is small in size, and the water flow drives the rotor to rotate (the rotor is enclosed with a rubber magnet) through the water outlet with the same aperture size. The flow rate is constant every time the rotor rotates. When the rotor rotates every circle, the Hall chip of the Hall sensor PCB board on the side will collect a signal (pulse); the user can set the required pulse signal through the main control board to control the flow rate. It can bring the following beneficial effects: 1. The built-in flow meter design at the water outlet makes the flow rate more accurate and repeatable, meeting the needs of high-end customers; 2. The product is integrated and modularized, and easy to install; 3. It can simplify the pipeline, reduce costs, and have market competitiveness.

[0030] Furthermore, in some embodiments, in order to make the rotor easier to rotate, the upper outlet direction of the right-angle through hole 84 is tangent to the outermost rotation circle of the rotor 86. With this design, the impact arm of the water flow is maximized and the rotation force is maximized, making the rotor rotation start-up more sensitive and the metering more precise.

[0031] Furthermore, in some embodiments, in order to reduce the impact of uneven mass distribution on the rotor rotation, a magnet is disposed at the center of the rotor shaft 86 to reduce the interference of the magnet's rotating inertia force on the rotor rotation, thereby making the measurement more accurate.

[0032] Furthermore, in some embodiments, in order to reduce the friction of the rotation of the rotor 86, the rotor 86 is provided with tapered shafts 88 at the top and bottom, and the rotor mounting table and the inner side of the metering mounting box are provided with tapered holes 89 corresponding to the tapered shaft 88. The upper and lower shafts of the rotor 86 are tapered in design and do not need to penetrate the upper cover 7 and the metering mounting box 83. The friction is small, the rotor rotates smoothly, the service life is long, and the metering accuracy is higher.

[0033] Furthermore, in some embodiments, the angle between two side waistlines opposite to each other on the side of the tapered hole 89 is 50°. Experimental tests have shown that this angle is optimal. Under the premise of ensuring service life, the friction is small and the rotor 86 rotates smoothly, thereby improving the metering accuracy.

[0034] In some embodiments, reference Figure 1 and Figure 3 As shown, one of the anti-leakage mechanisms 6 is as follows: it includes a spring 61, a movable sealing gasket 62, a diverter plate 63, and an upper sealing gasket 64;

[0035] The movable sealing gasket 62 is provided with an annular sealing boss 621, a liquid outlet hole 622, and a liquid inlet hole 623. The liquid outlet hole 622 is located opposite to the liquid outlet channel 51 of the connector 5, and the liquid inlet hole 623 is located opposite to the liquid inlet channel 52 of the connector 5.

[0036] The diverter plate 63 is provided with a sealing concave platform 631 facing the annular sealing boss 621, and a second liquid outlet hole 632 is provided at the center of the sealing concave platform 631 of the diverter plate 63. The diverter plate 63 is provided with a second liquid inlet hole 633 facing the first liquid inlet hole 623, and the diverter plate 63 is provided with a third liquid outlet hole 634 facing the first liquid outlet hole 622. The third liquid outlet hole 634 is connected to the annular edge of the sealing concave platform 631 on the other side close to the movable sealing gasket 62 and is provided with a guide hole 635 facing the annular sealing boss 621 downward. The third liquid outlet hole 634 is connected to the liquid outlet channel 51 of the connector 5 through the first liquid outlet hole 622, and the third liquid outlet hole 634 is connected to the second liquid outlet hole 632 through the guide hole 635.

[0037] The upper sealing gasket 64 is provided with a third liquid inlet hole 641 facing the second liquid inlet hole 633 , and the upper sealing gasket 64 is provided with a fourth liquid outlet hole 642 facing the second liquid outlet hole 632 ;

[0038] The movable sealing gasket 64 is movably arranged between the lower side of the diverter plate 63 and the upper side of the connector 5 by the spring 61 against the center of the annular sealing boss 621, and the upper sealing gasket 64 is pressed by the upper cover 5 to be close to the upper side of the diverter plate 63;

[0039] The water inlet pipe 10 of the upper cover 5 is connected to the liquid inlet channel 52 on the connector 5 through the opposite liquid inlet hole 3 641, the liquid inlet hole 2 633, and the liquid inlet hole 1 623 in sequence, and the water outlet pipe 9 of the upper cover 5 is connected to the liquid outlet channel 51 on the connector 5 through the metering component 8, the liquid outlet hole 4 642, the liquid outlet hole 2 632, the guide hole 635, the liquid outlet hole 3 634, and the liquid outlet hole 1 622 in sequence;

[0040] With this design, when the motor pump is running, the pressure medium can be guided through the guide hole 635 to break open the movable sealing gasket 62 held up by the spring 61, without affecting the normal pumping pressure medium of the motor pump; when the motor pump stops running, the movable sealing gasket 62 held up by the spring 61 is close to the liquid outlet hole 632 of the diverter plate 63, and cooperates with the sealing gasket 64 to block the connection between the liquid outlet channel 51 on the connector 5 and the outlet pipe 9 of the upper cover 7, thereby preventing the liquid from flowing rapidly toward the outlet pipe when there is a large drop (vertical distance) between the liquid level at the end of the water inlet pipe 10 and the end of the water outlet pipe 9 or when there is a large pressure at the end of the water inlet pipe 10, or the liquid from leaking out of the motor pump outlet pipe 9 due to gravity.

[0041] In some embodiments, reference Figure 1 As shown, one of the crank transmission mechanisms 3 includes a crank 31, a shaft 32, and a connecting rod 33. The crank 31 is fixed on the power shaft of the motor 2 to realize power connection. The connecting rod 33 is fixedly connected to the crank 31 through the shaft 32. The connecting rod 33 is a three-blade sheet structure. The blades are provided with connecting holes and are facing the pumping mechanism 4. The connecting rod 33 blades are connected to the pumping mechanism 4 to provide power.

[0042] In some embodiments, reference Figure 1 As shown, one of the pumping mechanisms 4 is an umbrella membrane pumping mechanism, including a diaphragm 41, a diaphragm bracket 42, a small umbrella valve 43, a valve bracket 44, a large umbrella valve 45, an outer ring sealing ring 46, and an inner ring sealing ring 47. The diaphragm 41 has three legs corresponding to a three-diaphragm chamber structure. The three legs of the diaphragm 41 are dynamically connected to the crank transmission mechanism 3. The diaphragm bracket 42 presses the diaphragm 41 and is fixed on the upper side of the base 1. The small umbrella valve 43 has three movably fixed on the valve bracket 44 and seals the three membrane chambers of the diaphragm 41. The valve bracket 44 is fixed on the upper side of the diaphragm bracket 42. An upward channel 48 is set in the center of the valve bracket 44. The large umbrella valve 45 is movably set in the middle of the connector 5 and the lower side seals the central channel 48 of the valve bracket 44. The upper side of the valve bracket 44 clamps the outer ring sealing ring 46 and the inner ring sealing ring 47 against the outer ring and inner ring of the lower side of the connector 5 and is fixedly connected;

[0043] Specifically, the motor 2 starts to rotate after being connected to the rated voltage and applies torque to the crank 31. The crank 31 rotates with the motor 2 and transmits kinetic energy to the diaphragm 41 on the connecting rod 33 through the shaft 32 installed in the inner inclined hole. The diaphragm 41 moves up and down like a piston. When each independent chamber of the diaphragm 41 moves downward, the large umbrella valve 45 is closed. At this time, negative pressure is formed in the chamber and the corresponding small umbrella valve 43 is opened. Under the action of atmospheric pressure, the liquid is sucked into each chamber of the diaphragm 41 through the designed flow channel and the water inlet pipe 10 of the upper cover 7, completing the liquid suction action.

[0044] When each independent chamber of the diaphragm 41 moves upward, the corresponding small umbrella valve 43 is closed. At this time, the chamber forms a pressure greater than the atmospheric pressure and opens the large umbrella valve 45. Under the action of pressure, the liquid is pumped into the pressure medium through the designed central upward channel 48 of the valve bracket 44 and the liquid outlet channel 51 of the connector 5.

[0045] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present invention.

[0046] Although the present invention is described herein with reference to a number of illustrative embodiments of the present invention, it will be appreciated that those skilled in the art may devise many other modifications and implementations that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the present disclosure, drawings, and claims, a variety of variations and improvements may be made to the components and / or layout of the subject combination layout. In addition to variations and improvements made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A leak-proof metering pump, comprising a base (1), a motor (2) fixed to the lower side of the base (1), a crank transmission mechanism (3) connected to the motor (2) by power, a pumping mechanism (4) fixed to the upper side of the base (1) and connected to the crank transmission mechanism (3) by power, and a coupling (5) sealed and fixedly sleeved on the upper side of the pumping mechanism (4), characterized in that: The connector (5) is sealed with a leak-proof mechanism (6) on the upper side and is sealed and connected to the upper cover (7). A water outlet hole (71) is provided at the center of the upper cover (7). The upper side of the water outlet hole (71) is connected to the water outlet pipe (9) through a metering component (8). A water inlet hole (72) is provided on the side of the center of the upper cover (7) and is connected to the water inlet pipe (10) on the upper side of the upper cover (7). A first sealing convex edge (73) is provided on the outer side of the water inlet hole (72) to abut against the outer ring of the water inlet channel of the leak-proof mechanism (6) and is directly connected to the water inlet channel of the leak-proof mechanism (6) in a sealed manner. A water outlet groove (74) is arranged on the side of the water outlet hole (71) of the upper cover (7); the water outlet hole (71) and the water outlet groove (74) are connected via a plug (75); the outer side of the water outlet hole (71) and the convex edge of the bottom of the plug (75) are surrounded by a second sealing convex edge (76) which abuts against the upper side of the leakage prevention mechanism (6) for sealing; the outer side of the water outlet groove (74) and the convex edge of the bottom of the plug (75) are surrounded by a third sealing convex edge (77) which abuts against the outer circle of the water outlet channel of the leakage prevention mechanism (6) for directly and tightly connecting with the water outlet channel of the leakage prevention mechanism (6).

2. The leak-proof metering pump according to claim 1, characterized in that: The metering assembly (8) comprises a steering boss (81) arranged at the center of the upper side of the upper cover (7), and a metering installation box (83) arranged on the outer side of the steering boss (81) is covered by an upper sealing ring (82); the outer side of the upper end of the metering installation box (83) is fixedly connected to and communicated with the water outlet pipe (9); a right-angle through hole (84) is arranged in the steering boss (81) to communicate with the water outlet hole (71) of the upper cover (7); a rotor mounting platform (85) is arranged in front of the upper outlet of the right-angle through hole (84) of the steering boss (81); a rotor (86) is rotatably arranged between the rotor mounting platform (85) and the metering installation box (83); a magnet is arranged on the rotor (86); a fan blade is arranged on the side of the rotor (86) in a direction perpendicular to the upper outlet of the right-angle through hole (84); a Hall sensor PCB board (87) is arranged on the outer side of the metering installation box (83); the Hall sensor PCB board (87) is located on the side of the rotor (86).

3. The leak-proof metering pump according to claim 2, characterized in that: The outlet direction of the upper side of the right-angle through hole (84) is tangent to the outermost rotation circle of the rotor (86).

4. The leak-proof metering pump according to claim 2, characterized in that: The magnet is arranged at the center of the rotor (86) shaft.

5. The leak-proof metering pump according to claim 2, characterized in that: The rotor (86) is provided with tapered shafts (88) at the top and bottom, and the rotor mounting platform and the inner side of the metering mounting box are provided with tapered holes (89) corresponding to the tapered shafts (88).

6. The leak-proof metering pump according to claim 5, characterized in that: The included angle of two side waistlines opposite to each other on the side of the tapered hole (89) is 50°.

7. The leak-proof metering pump according to claim 1, characterized in that: The anti-leakage mechanism (6) comprises a spring (61), a movable sealing gasket (62), a diverter plate (63), and an upper sealing gasket (64); The movable sealing pad (62) is provided with an annular sealing boss (621), a liquid outlet hole (622), and a liquid inlet hole (623); the liquid outlet hole (622) is located opposite to the liquid outlet channel (51) of the connector (5), and the liquid inlet hole (623) is located opposite to the liquid inlet channel (52) of the connector (5); The diverter disc (63) is provided with a sealing recess (631) facing the annular sealing protrusion (621); a second liquid outlet hole (632) is provided at the center of the sealing recess (631) of the diverter disc (63); the diverter disc (63) is provided with a second liquid inlet hole (633) facing the first liquid inlet hole (623); the diverter disc (63) is provided with a third liquid outlet hole (634) facing the first liquid outlet hole (622); The third liquid outlet hole (634) is connected to the annular edge of the sealing concave platform (631) on the other side close to the movable sealing gasket (62) and is provided with a guide hole (635) facing downwardly to the annular sealing protrusion (621); the third liquid outlet hole (634) is connected to the liquid outlet channel (51) of the connector (5) through the first liquid outlet hole (622); the third liquid outlet hole (634) is connected to the second liquid outlet hole (632) through the guide hole (635); The upper sealing gasket (64) is provided with a third liquid inlet hole (641) facing the second liquid inlet hole (633), and the upper sealing gasket (64) is provided with a fourth liquid outlet hole (642) facing the second liquid outlet hole (632); The movable sealing gasket (64) is movably arranged between the lower side of the diverter plate (63) and the upper side of the connector (5) by pressing against the center of the annular sealing boss (621) through the spring (61), and the upper sealing gasket (64) is pressed by the upper cover (5) to be tightly attached to the upper side of the diverter plate (63); The water inlet pipe (10) of the upper cover (5) is connected to the liquid inlet channel (52) on the connector (5) in sequence through the liquid inlet hole three (641), the liquid inlet hole two (633), and the liquid inlet hole one (623) which are located opposite to each other; the water outlet pipe (9) of the upper cover (5) is connected to the liquid outlet channel (51) on the connector (5) in sequence through the metering component (8), the liquid outlet hole four (642), the liquid outlet hole two (632), the guide hole (635), the liquid outlet hole three (634), and the liquid outlet hole one (622).

8. The leak-proof metering pump according to claim 1, characterized in that: The crank transmission mechanism (3) comprises a crank (31), a shaft (32), and a connecting rod (33); the crank (31) is fixed on the power shaft of the motor (2) to achieve power connection; the connecting rod (33) is fixedly connected to the crank (31) via the shaft (32); the connecting rod (33) is a three-blade sheet structure; the blades are provided with connection holes and face the pumping mechanism (4); the connecting rod (33) blades are power-connected to the pumping mechanism (4) to provide power.

9. The leak-proof metering pump according to claim 1, characterized in that: The pumping mechanism (4) is an umbrella membrane pumping mechanism, comprising a diaphragm (41), a diaphragm bracket (42), a small umbrella valve (43), a valve bracket (44), a large umbrella valve (45), an outer ring sealing ring (46), and an inner ring sealing ring (47). The diaphragm (41) has three legs corresponding to a three-diaphragm chamber structure. The three legs of the diaphragm (41) are dynamically connected to the crank transmission mechanism (3). The diaphragm bracket (42) presses the diaphragm (41) and is fixed to the upper side of the base (1). The small umbrella valve (43) has three It is movably fixed on the valve bracket (44) and seals the three membrane chambers of the diaphragm (41). The valve bracket (44) is fixed on the upper side of the diaphragm bracket (42). An upward channel (48) is set in the center of the valve bracket (44). The large umbrella valve (45) is movably set in the middle of the connector (5) and the lower side seals the central channel (48) of the valve bracket (44). The upper side of the valve bracket (44) clamps the outer ring sealing ring (46) and the inner ring sealing ring (47) respectively against the outer ring and inner ring of the lower side of the connector (5) for fixed connection.

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