CN215979741U

CN215979741U - Plunger pump with piston moving driven by screw

Info

Publication number: CN215979741U
Application number: CN202122450780.8U
Authority: CN
Inventors: 胡晓红
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-10-12
Filing date: 2021-10-12
Publication date: 2022-03-08
Anticipated expiration: 2031-10-12

Abstract

The utility model relates to the technical field of plunger pumps, in particular to a plunger pump with a piston moving driven by a screw. The cylinder barrel comprises a cylinder barrel, an end cover is arranged at the end of the cylinder barrel, a one-way valve and a pipeline connecting thread or a buckle are arranged on the end cover, a piston is arranged on the inner wall of the cylinder barrel, a driving piece is arranged on the piston, a nut seat and a magnetic ring are arranged on the piston, a screw rod is arranged at the output end of the driving piece, a coded disc is further arranged on the screw rod, and the screw rod and the nut seat form a thread pair rotating fit. The motor and the transmission are arranged at one end of the cylinder barrel, the screw rod is arranged at the end part of the transmission and can drive the piston to move in the cylinder barrel, the screw rod is matched with the nut seat, and the counting control of the code disc and the photoelectric switch can accurately measure the volume of liquid extracted or discharged. The cylinder barrel is provided with a chip through the signal input of the photoelectric switch and the magnetic control switch, and the moving distance of the piston is accurately controlled, so that the volume of the liquid discharged by the cylinder barrel can be controlled.

Description

Plunger pump with piston moving driven by screw

Technical Field

The utility model relates to the technical field of plunger pumps, in particular to a plunger pump with a piston moving driven by a screw.

Background

Plunger pump on the existing market all is bent axle connecting rod actuating mechanism or similar mechanism, and this kind of mechanism is at the in-process piston motion of motor uniform motion not uniform motion, and this brings the difficulty for needs accurate measurement, and single cylinder plunger pump atress change inequality at the stroke in-process, and load change is big, needs high-power drive to cross dead point or flywheel energy storage structure to assist and cross the dead point, and energy utilization reduces like this, and the measuring pump of mainstream is diaphragm pump, gear pump and peristaltic pump more.

Chinese patent publication No. CN208153270U, entitled "an efficient plunger pump", includes an oil inlet pipe and an oil outlet pipe, the two ends of the oil inlet pipe and the oil outlet pipe are provided with a left compression unit and a right compression unit, the left compression unit includes a first motor and a left compression cylinder, a left piston column is movably mounted in the left compression cylinder, the bottom of the left piston column is movably connected with a left push rod, the first motor is connected with a left flywheel, the left flywheel is movably connected with the bottom of the left push rod through an eccentric shaft fixedly arranged thereon, the second compression unit includes a second motor and a right compression cylinder, a right piston column is movably mounted in the right compression cylinder, the bottom of the right piston column is movably connected with a right push rod, the second motor is connected with a right flywheel, and the right flywheel is movably connected with the bottom of the right push rod through an eccentric shaft fixedly arranged thereon. The oil suction and pressure oil suction device can suck oil and press oil, improves the working efficiency of a hydraulic system, and has the advantages of simple structure, convenience in use and good use effect.

Although the plunger pump can drive the push rod through the flywheel to further enable the piston column to be pushed in the plunger pump to further complete oil absorption and oil pressing, the flywheel is used for driving the piston column to move, the flywheel can rotate according to inertia after the motor stops in the rotating process, the piston column still moves forwards, oil output is difficult to control, and the oil cannot be accurately discharged according to the required oil amount.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a plunger pump capable of efficiently and accurately controlling the position of a piston and accurately controlling the flow rate and driving the piston to move by a screw, aiming at the problems in the background art.

The technical scheme of the utility model is as follows: the utility model provides a plunger pump of screw rod drive piston motion, includes the cylinder, the tip of cylinder is provided with the end cover, is provided with business turn over check valve and pipeline connection screw thread or buckle on the end cover, the cylinder inner wall is provided with the piston, be provided with the driving piece on the cylinder, be provided with nut seat and magnetic ring on the piston, the output of driving piece is provided with the screw rod, and the screw rod constitutes screw thread normal running fit with the nut seat.

Preferably, the driving member comprises a motor and a transmission, an input end of the transmission is connected with an output end of the motor, and an output end of the transmission and the driving screw form power transmission.

Preferably, the cylinder barrel is provided with a photoelectric switch and a magnetic switch.

Preferably, a magnetic ring is arranged on the piston in the cylinder barrel.

Preferably, the drive screw is provided with a code wheel.

Preferably, the outer edge of the piston is provided with a sealing plug.

Preferably, a one-way valve is arranged on the end cover.

Compared with the prior art, the utility model has the following beneficial technical effects:

1. the motor and the speed changer are arranged at one end of the cylinder barrel, the screw rod is arranged at the end part of the speed changer, the code disc is arranged on the screw rod, the magnetic ring is arranged on the piston, the nut seat which is in threaded rotation fit with the screw rod is arranged at the end part of the piston, the screw rod can drive the piston to move in the cylinder barrel when rotating, the photoelectric switch is further arranged on the cylinder barrel, a position signal is transmitted into the chip through the combination of the code disc and the photoelectric switch and the combination of the magnetic ring and the magnetic control switch, the motor is controlled by the chip to operate, the piston displacement is accurately controlled through the speed reducer and the screw rod, and therefore the liquid volume is accurately measured and extracted or discharged.

2. The cylinder barrel is provided with a related electric switch and a magnetic control switch, the piston is provided with a magnetic ring, the screw rod is provided with a coded disc, the screw rod rotates to drive the coded disc to rotate, the photoelectric switch senses the coded disc to count, the magnetic control switch is triggered to be closed when the magnetic ring moves to an upper dead point, and the chip sets the position of the piston at the moment to a downward-shifting zero position, so that the volume of discharged liquid can be accurately controlled, and the piston can also be driven by a stepping motor or a servo motor to control the displacement of the piston, thereby accurately controlling the flow.

Drawings

FIG. 1 is a sectional view of the structure of one embodiment of the present invention.

Reference numerals: 1. an end cap; 2. a liquid inlet check valve; 3. a liquid outlet one-way valve; 4. a cylinder barrel; 5. a piston; 6. a seal ring; 7. a drive screw; 8. a nut seat; 9. a magnetic ring; 10. a magnetic control switch; 11. code disc; 12. mounting a bracket; 13. a transmission; 14. a motor; 15. a photoelectric switch.

Detailed Description

Example one

As shown in the figure, the plunger pump for driving the screw rod to drive the piston to move comprises a cylinder barrel 4, wherein the cylinder barrel 4 is of a cylindrical hollow structure, a piston 5 is arranged in the cylinder barrel 4, the diameter of the outer wall of the piston 5 is matched with the diameter of the inner wall of the cylinder barrel 4, a sealing ring 6 is further arranged on the outer side of the piston 5 in the embodiment, the sealing ring 6 is arranged on the outer edge of the piston 5 in an annular structure, the piston 5 and the inner wall of the cylinder barrel 4 are sealed, a mounting bracket 12 is arranged at one end of the cylinder barrel 4, and a transmission 13 is fixedly arranged on the outer side of the mounting bracket 12. The output end of the transmission 13 is fixedly provided with the driving screw 7, the outer side of the transmission 13 is fixedly provided with the motor 14, and the output end of the motor 14 is connected with the input end of the transmission 13, so that when the motor 14 rotates, the output end of the motor 14 drives the input end of the transmission 13 to rotate, and further the output end of the transmission 13 drives the driving screw 7 to rotate. The center of the piston 5 is provided with a slender blind hole, an opening of the blind hole faces one side of the motor 14, a nut seat 8 in threaded connection with the driving screw 7 is fixedly mounted on the outer side of the blind hole, and it should be noted that the diameter of the inner wall of the blind hole is not smaller than the diameter of the maximum outer wall of the driving screw 7, so that the driving screw 7 can move in the blind hole relative to the piston 5.

The end of the cylinder barrel 4 far away from the motor 14 is provided with an end cover, the end cover is provided with two pipe connectors, the pipe connectors can be used for external pipelines, and the two pipe connectors are internally provided with a liquid inlet one-way valve 2 and a liquid outlet one-way valve 3 respectively, so that liquid can be fed or discharged only when the piston 5 moves.

The motor 14 and the speed changer 13 are arranged at one end of the cylinder 4, the driving screw 7 is arranged at the end part of the speed changer 13, the nut seat 8 which is in threaded rotation fit with the driving screw 7 is arranged at the end part of the piston 5, so that the driving screw 7 can drive the piston 5 to move in the cylinder 4 when rotating, and the volume of liquid which is extracted or discharged can be accurately measured by using the fit of the driving screw 7 and the nut seat 8.

Example two

As shown in the figures, compared with the first embodiment, the plunger pump for driving the screw to drive the piston 5 to move provided by the utility model is characterized in that the photoelectric switch 15 is installed on the cylinder 4, the code disc 11 is installed on the driving screw 7, the photoelectric switch 15 and the code disc 11 are combined to provide a revolution parameter for a chip, the magnetic control switch 10 is also installed on the cylinder 4, the magnetic ring 9 is also installed on the driving piston 5, and the magnetic ring 9 controls the magnetic control switch 10 to provide a top dead center position signal of the driving piston 5 for the chip.

When the electromagnetic valve is used, the starting switch is turned on, the chip controls the motor 14 to rotate clockwise (namely the piston 5 moves upwards), the motor 14 drives the transmission 13 to operate, the output end of the transmission 13 further drives the driving screw 7 to rotate in the nut seat 8, further, the nut seat 8 drives the piston 5 to move (move upwards) in the cylinder 4, the cylinder 4 is in a liquid pumping state, when the motor 14 rotates clockwise, the driving screw 7 drives the cylinder 4 to move towards a direction far away from the end cover 1 through the nut seat 8, the liquid outlet one-way valve 3 is closed at the moment, liquid enters through the liquid inlet one-way valve 2, when the piston 5 moves, the magnetic ring 9 moves along with the movement, when the magnetic ring 9 moves upwards to a certain position, the magnetic control switch 10 is closed in an induction manner, at the moment, the chip stops the motor operation after receiving a signal, and controls the motor 14 to operate anticlockwise after memorizing the position as a zero position, and at the moment, the piston 5 moves downwards, the liquid inlet one-way valve 2 is closed, the liquid outlet one-way valve 3 is opened, the pump is in a liquid discharging state, the chip controls the motor to stop anticlockwise running after running at rated revolution, the motor runs clockwise and anticlockwise, the liquid discharging operation is achieved in a circulating reciprocating mode, the liquid discharging amount is controlled according to keys, and the chip controls the descending times and the displacement of the piston to achieve accurate control through operation.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. The plunger pump is characterized in that a nut seat and a magnetic ring are arranged on the piston, a driving screw is arranged at the output end of the driving piece, and the driving screw and the nut seat form threaded rotation fit.

2. A screw driven piston motion plunger pump as claimed in claim 1 in which the drive member includes an electric motor and a variator having an input coupled to an output of the motor and an output coupled to the drive screw for power transmission.

3. A screw driven piston motion plunger pump as claimed in claim 1 or claim 2 in which the cylinder is provided with an opto-electronic switch and a magnetically controlled switch.

4. A screw driven piston motion plunger pump as claimed in claim 3, wherein said piston is provided with a magnetic ring and said drive screw is provided with a code disc.

5. A screw driven piston motion plunger pump as claimed in claim 1 in which the outer periphery of the piston is provided with a sealing plug.

6. A screw driven piston motion plunger pump as claimed in claim 1 in which the end cap is provided with a one-way valve.