CN205977579U - Motor pump - Google Patents

Abstract

The utility model discloses a motor pump, which comprises a shell, wherein a piston cavity is arranged in the shell, the piston cavity is provided with a water inlet and a water outlet for one-way flow of liquid, and a piston capable of moving up and down is arranged in the piston cavity; a motor controls the piston to move up and down through a connecting rod assembly, and a magnet is arranged on the connecting rod assembly; a Hall sensor is arranged to detect the position of the magnet. The utility model discloses have the measurement function, simplify metering device's structure.

Description

a motor pump

technical field

The utility model relates to the technical field of water pumps, in particular to a motor pump with a flow meter function.

Background technique

The piston pump relies on the reciprocating movement of the piston, which makes the working volume of the pump chamber change periodically to realize the suction and discharge of liquid. It consists of pump cylinder, piston, water inlet and outlet valves, water inlet and outlet pipes, connecting rod and transmission device. The piston is driven to reciprocate in the pump cylinder by power. When the piston moves upward, the water inlet valve opens, water enters the pump cylinder, and at the same time the water valve on the piston closes, and the water on the upper part of the piston lifts up with the piston; when the piston moves downward, the water inlet valve closes, and the valve on the piston opens At the same time, the water in the lower chamber of the pump cylinder is pressed into the upper chamber and rises into the outlet pipe, so that the water is repeatedly fed and lifted, so that the water is continuously discharged from the outlet pipe.

However, there is a lack of a simple metering device for the piston pump at present. The general method is to connect a separate flow meter outside the outlet pipe, which increases user costs.

Utility model content

The technical problem to be solved by the utility model is to provide a motor pump with a metering function to simplify the structure of the metering device, aiming at the shortcomings of the above-mentioned prior art.

In order to solve the above-mentioned technical problems, the technical solution adopted by the utility model is: a motor pump, including a casing, a piston cavity is arranged in the casing, and the piston cavity is provided with a water inlet and an outlet for one-way flow of liquid. In the nozzle, a piston that can move up and down is arranged in the piston cavity; a motor controls the piston to move up and down through a connecting rod assembly, and a magnet is arranged on the connecting rod assembly; a Hall sensor is arranged to detect the position of the magnet.

In the above technical solution, the Hall sensor is electrically connected to an external circuit through a circuit board and a connector.

In the above technical solution, the connecting rod assembly includes an eccentric wheel, a connecting rod and a pin, the eccentric hole of the eccentric wheel is sleeved on the output shaft of the motor, one end of the connecting rod is fixed to the eccentric wheel, and the connecting rod The other end is hinged to the piston by a pin.

In the above technical solution, a magnet is arranged on the eccentric wheel.

In the above technical solution, a magnet is provided on the connecting rod.

In the above technical solution, the housing is provided with a U-shaped bracket, the motor is installed on one side of the bracket, the Hall sensor is installed on the other side of the bracket, and the connecting rod assembly is located on both sides of the bracket between.

In the above technical solution, the bottom plate of the bracket covers the top opening of the piston cavity and is provided with an opening for the piston to move.

In the above technical solution, a sealing ring is provided between the bottom plate of the bracket and the top opening of the piston cavity.

In the above technical solution, the water inlet and the water outlet are respectively provided with one-way valve rubber plugs.

The beneficial effects of the utility model are: by setting the Hall sensor to detect the position of the magnet set on the connecting rod assembly, the statistics of the flow rate can be converted according to the number of times the position of the magnet deviates, the structure of the flowmeter is simplified, and the flowmeter Combined with the motor pump, it saves the cost of separately setting the flow meter and avoids the space occupied by the flow meter.

Description of drawings

Fig. 1 is the overall structural representation of the utility model;

Fig. 2 is a sectional structural representation of the utility model;

Fig. 3 is another cross-sectional structural schematic diagram of the present invention.

In the figure, 1. Shell; 2. Piston cavity; 3. Water inlet; 4. Water outlet; 5. Water inlet pipe; 6. Water outlet pipe; 7. Piston; 8. Motor; 9. Magnet; 10. Hall Er sensor; 11, circuit board; 12, connector; 13, transition cavity; 14, eccentric wheel; 15, connecting rod; 16, pin; 17, output shaft; 18, bracket; 19, sealing ring; 20, Check valve rubber plug.

detailed description

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figures 1, 2, and 3, a motor pump includes a housing 1, and a piston cavity 2 is provided in the housing 1. The piston cavity 2 is provided with a water inlet 3 and an outlet for liquid to flow in one direction. The water inlet 4, the two ends of the housing 1 are provided with the water inlet pipe 5 and the water outlet pipe 6 respectively connected to the water inlet 3 and the water outlet 4, and the water inlet pipe 5 and the water outlet pipe 6 are respectively; A movable piston 7; a motor 8 controls the piston 7 to move up and down through the connecting rod 15 assembly, and the connecting rod 15 assembly is provided with a magnet 9; a Hall sensor 10 is provided to detect the position of the magnet 9, and the Hall The sensor 10 is electrically connected to an external circuit through a circuit board 11 and a connector 12 . A transition chamber 13 is provided between the water inlet pipe 5 and the water inlet 3 , and a transition chamber 13 is provided between the water outlet pipe 6 and the water outlet 4 . The water inlet 3 and the water outlet 4 are arranged at the bottom of the piston cavity 2 .

Wherein, the connecting rod 15 assembly includes an eccentric wheel 14, a connecting rod 15 and a pin 16, the eccentric hole of the eccentric wheel 14 is sleeved on the output shaft 17 of the motor 8, and one end of the connecting rod 15 is connected to the eccentric Wheel 14 is fixed, and the other end of connecting rod 15 is hinged on piston 7 by pin 16. The eccentric wheel 14 is a boss cylinder, and the eccentric hole and the installation hole for installing the magnet 9 are all arranged on the boss, and one end of the connecting rod 15 is just sleeved on the boss.

Wherein, a magnet 9 is arranged on the eccentric wheel 14 . Or a magnet 9 is arranged on the connecting rod 15 . The position of the magnet 9 can be indeterminate, but in view of the actual application structure, considering the moving distance of the magnet 9 and the accuracy of the displacement distance of the magnet 9 by the Hall sensor 10, it is generally adopted to arrange the magnet 9 at a position close to the eccentric hole , so as to limit the displacement distance of the magnet 9 to the interval that the Hall sensor 10 can accurately sense.

Wherein, the housing 1 is provided with a U-shaped bracket 18, and the bracket 18 is fixed to the housing 1 by screws; the motor 8 is fixed on one side of the bracket 18 by screws, and the Hall sensor 10 is installed on On the other side of the bracket 18 , the connecting rod 15 assembly is located between the two sides of the bracket 18 .

Wherein, the bottom plate of the bracket 18 covers the top opening of the piston cavity 2 and is provided with an opening for the piston 7 to move. The piston 7 is inserted into the piston cavity 2 through the top opening.

Wherein, a sealing ring 19 is provided between the bottom plate of the bracket 18 and the top opening of the piston cavity 2 .

Wherein, the water inlet 3 and the water outlet 4 are respectively provided with one-way valve rubber plugs 20 .

The working principle of the utility model: the motor 8 rotates through the eccentric wheel 14 and the connecting rod 15 to drive the piston 7 to move along the piston cavity 2 to make the fixed piston 7 move, and the piston 7 controls the quantitative flow of liquid into and out of the piston cavity 2 during the movement of the piston 7 Specifically, when the piston 7 rises, the one-way valve rubber plug 20 of the water inlet 3 is opened, the one-way valve rubber plug 20 of the water outlet 4 is closed, and the liquid enters the piston cavity 2 from the water inlet 3; when the piston 7 descends, The one-way valve rubber plug 20 of the water inlet 3 is closed, the one-way valve rubber plug 20 of the water outlet 4 is opened, and the liquid flows out from the piston cavity 2 through the water outlet 4; therefore, the flow rate can be calculated by calculating the number of movements and the position of the piston 7 how much. The eccentric wheel 14 drives the magnet 9 to rotate eccentrically. The magnet 9 produces a fixed position offset relative to the initial position. The Hall sensor 10 senses the position offset and outputs a pulse electrical signal. The pulse electrical signal is converted into a digital signal by the circuit board 11. The signal is output and the liquid flow is calculated according to the number of the signal.

The above embodiments are only intended to illustrate rather than limit the utility model, so all equivalent changes or modifications made according to the method described in the scope of the patent application of the utility model are included in the scope of the patent application of the utility model.

Claims (9)

1. A motor pump, characterized in that: comprising a housing, a piston chamber is provided in the housing, the piston chamber is provided with a water inlet and a water outlet for the unidirectional flow of liquid, and in the piston chamber is provided with a A piston that moves up and down; a motor controls the piston to move up and down through a connecting rod assembly, and a magnet is arranged on the connecting rod assembly; a Hall sensor is arranged to detect the position of the magnet. 2. The motor pump according to claim 1, wherein the Hall sensor is electrically connected to an external circuit through a circuit board and a connector. 3. A motor pump according to claim 1, wherein the connecting rod assembly comprises an eccentric wheel, a connecting rod and a pin, and the eccentric hole of the eccentric wheel is sleeved on the output shaft of the motor, One end of the connecting rod is fixed with the eccentric wheel, and the other end of the connecting rod is hinged on the piston through a pin. 4. A motor pump according to claim 3, characterized in that: a magnet is arranged on the eccentric wheel. 5. A motor pump according to claim 3, characterized in that: a magnet is arranged on the connecting rod. 6. A motor pump according to claim 1, wherein a U-shaped bracket is arranged on the housing, the motor is installed on one side of the bracket, and the Hall sensor is installed on the side of the bracket. On the other hand, the linkage assembly is located between two sides of the bracket. 7 . The motor pump according to claim 6 , wherein the bottom plate of the bracket covers the top opening of the piston chamber and is provided with an opening for the piston to move. 8 . The motor pump according to claim 6 , wherein a sealing ring is arranged between the bottom plate of the bracket and the top opening of the piston cavity. 9. A motor pump according to claim 1, characterized in that: the water inlet and the water outlet are respectively provided with one-way valve rubber plugs.