CN215719288U

CN215719288U - Single-cylinder plunger pump

Info

Publication number: CN215719288U
Application number: CN202121502986.4U
Authority: CN
Inventors: 钟金海
Original assignee: Shanghai Henggao Hydraulic Equipment Co ltd
Current assignee: Shanghai Henggao Hydraulic Equipment Co ltd
Priority date: 2021-07-04
Filing date: 2021-07-04
Publication date: 2022-02-01
Anticipated expiration: 2031-07-04

Abstract

The utility model discloses a single-cylinder plunger pump, wherein a pump body shell is fixedly connected to the right surface of an outer-layer protection box, a cylindrical pump plug is connected to the inner surface of the pump body shell in a sliding mode, an oil outlet is formed in the upper surface of the pump body shell, a first one-way valve is fixedly connected to the inner surface of the oil outlet, an oil inlet is formed in the lower surface of the pump body shell, and a distance sensor is fixedly connected to the inner wall of the bottom of the outer-layer protection box. According to the utility model, the distance and the frequency of the movement of the cylindrical pump plug are controlled by designing the eccentric wheels and the telescopic rods, the liquid flow rate of the single-cylinder plunger pump is changed, the oil inlet speed of each oil inlet is gradually reduced when oil enters the cavity, vacuum bubbles are avoided, the metering accuracy is increased, the rotating speed of the motor is corrected by designing the host and the distance sensor, and the phenomenon that the motor cannot work at rated power due to the change of voltage and the metering error of fuel oil is avoided.

Description

Single-cylinder plunger pump

Technical Field

The utility model relates to the field of plunger pumps, in particular to a single-cylinder plunger pump.

Background

The plunger pump is an important device of the hydraulic system. The plunger reciprocates in the cylinder body to change the volume of the sealed working cavity so as to absorb and press oil. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, convenient flow regulation and the like, and is widely applied to occasions with high pressure, large flow and flow regulation, such as hydraulic machines, engineering machinery and ships. The structure is mainly composed of an eccentric wheel, a plunger, a spring, a cylinder body and two one-way valves. And a closed volume is formed between the plunger and the cylinder body hole. The eccentric wheel rotates one time, the plunger reciprocates up and down once, moves downwards to absorb oil, and moves upwards to discharge oil. The volume of oil displaced per revolution of the pump is called displacement, which is related only to the structural parameters of the pump.

1. The volume of liquid pumped out by a single time cannot be changed by the conventional single-cylinder plunger pump, and different pump oil requirements cannot be adjusted;

2. when the moving speed of the existing single-cylinder plunger pump is too high, vacuum bubbles can be generated, and the metering of the flow can be influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provides a single-cylinder plunger pump.

In order to achieve the purpose, the utility model adopts the following technical scheme: a single-cylinder plunger pump comprises an outer-layer protection box and a motor, wherein a pump body shell is fixedly connected to the right surface of the outer-layer protection box, a cylindrical pump plug is connected to the inner surface of the pump body shell in a sliding mode, an oil outlet is formed in the upper surface of the pump body shell, a first one-way valve is fixedly connected to the inner surface of the oil outlet, and an oil inlet is formed in the lower surface of the pump body shell;

the bottom inner wall of outer guard box fixedly connected with distance sensor, the rear surface fixed connection of outer guard box has the host computer, the output fixedly connected with output shaft of motor, the outer fixed surface of output shaft is connected with the eccentric wheel, the front surface of eccentric wheel is provided with the recess, the recess with cylindricality pump plug sliding connection, the front surface fixed connection of motor has the telescopic link.

As a further description of the above technical solution:

a cavity is formed between the cylindrical pump plug and the pump body shell, and an end cover is fixedly connected to the right surface of the pump body shell.

As a further description of the above technical solution:

the oil inlet is distributed in a plurality of left and right directions, and the inner surface of the oil inlet is fixedly connected with a second one-way valve.

As a further description of the above technical solution:

the diameter of the cylindrical pump plug is the same as the inner diameter of the pump body shell, and the left end of the cylindrical pump plug extends to the outer side of the pump body shell.

As a further description of the above technical solution:

the distance sensor is electrically connected with the host, and the groove is in sliding connection with the cylindrical pump plug.

As a further description of the above technical solution:

the number of the eccentric wheels is multiple and the eccentric wheels are distributed front and back, and the diameters of the eccentric wheels decrease from back to front.

As a further description of the above technical solution:

the number of telescopic links is two and distributes from top to bottom, the output of telescopic link and the rear surface fixed connection of outer guard box.

As a further description of the above technical solution:

and a seal is arranged between the pump body shell and the cylindrical pump plug.

The utility model has the following beneficial effects:

1. compared with the prior art, the single-cylinder plunger pump has the advantages that the distance and the frequency of the cylindrical pump plug are controlled by designing the eccentric wheels and the telescopic rods, and the liquid flow rate of the single-cylinder plunger pump is changed.

2. Compared with the prior art, this single cylinder plunger pump through the design oil inlet, realizes that when fluid gets into the inside of cavity, the speed of every oil inlet oil feed is more and more slow, avoids producing the vacuum bubble, increases the accuracy of measurement.

3. Compared with the prior art, the single-cylinder plunger pump realizes the correction of the rotating speed of the motor by designing the host and the distance sensor, and avoids the problem that the motor cannot work at rated power due to the change of voltage, so that the metering of fuel oil generates errors.

Drawings

FIG. 1 is a schematic diagram of the internal structure of a single cylinder plunger pump according to the present invention;

FIG. 2 is an enlarged view of the structure at A in FIG. 1;

FIG. 3 is a top view of a single cylinder plunger pump according to the present invention;

fig. 4 is a schematic view of the overall structure of a single-cylinder plunger pump according to the present invention.

Illustration of the drawings:

1. an outer protective box; 2. an oil outlet; 3. an eccentric wheel; 4. a groove; 5. a pump body housing; 6. an oil inlet; 7. an end cap; 8. a cylindrical pump plug; 9. a cavity; 10. an output shaft; 11. a motor; 12. a telescopic rod; 13. a first check valve; 14. a second one-way valve; 15. a distance sensor; 16. a host.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 4, the present invention provides a single cylinder plunger pump: including outer guard box 1, motor 11, the right fixed surface of outer guard box 1 is connected with pump body shell 5, vacuole formation 9 between cylindricality pump stopper 8 and the pump body shell 5, the right fixed surface of pump body shell 5 is connected with end cover 7, the internal surface sliding connection of pump body shell 5 has cylindricality pump stopper 8, be provided with the obturating between pump body shell 5 and the cylindricality pump stopper 8, the diameter of cylindricality pump stopper 8 is the same with the internal diameter of pump body shell 5, the left end of cylindricality pump stopper 8 extends to the outside of pump body shell 5, the upper surface of pump body shell 5 is provided with oil-out 2, the internal surface fixed connection of oil-out 2 has first check valve 13, the lower surface of pump body shell 5 is provided with oil inlet 6, the quantity of oil inlet 6 is a plurality of and controls the distribution, the internal surface fixed connection of oil inlet 6 has second check valve 14.

The bottom inner wall of the outer protection box 1 is fixedly connected with a distance sensor 15, the distance sensor 15 is used for detecting the distance and monitoring the number of rotating circles of a motor 11, the distance sensor 15 is electrically connected with a host computer 16, the grooves 4 are in sliding connection with cylindrical pump plugs 8, the rear surface of the outer protection box 1 is fixedly connected with the host computer 16, the output end of the motor 11 is fixedly connected with an output shaft 10, the output shaft 10 is used for driving eccentric wheels 3 to rotate, the outer surface of the output shaft 10 is fixedly connected with eccentric wheels 3, the eccentric wheels 3 are used for enabling the cylindrical pump plugs 8 to move, the number of the eccentric wheels 3 is multiple and distributed front and back, the diameters of the eccentric wheels 3 decrease progressively from back to front, the grooves 4 are arranged on the front surface of the eccentric wheels 3, the grooves 4 are in sliding connection with the cylindrical pump plugs 8, the front surface of the motor 11 is fixedly connected with telescopic rods 12, and the telescopic rods 12 are used for controlling the positions of the output shaft 10, the number of the telescopic rods 12 is two and the telescopic rods are distributed up and down, and the output ends of the telescopic rods 12 are fixedly connected with the rear surface of the outer-layer protection box 1.

The working principle is as follows: the oil inlet 6 and the oil outlet 2 are respectively connected into a pipeline, the motor 11 is started, the motor 11 drives the eccentric wheel 3 to rotate, during the rotation of the eccentric wheel 3, the eccentric wheel 3 drives the cylindrical pump plug 8 to move left and right, when the cylindrical pump plug 8 moves left, negative pressure is generated in the cavity 9, the second one-way valve 14 is opened, and as the cylindrical pump plug 8 moves leftward, the number of the second check valves 14 that are opened increases, the flow rate of the liquid decreases, when the cylindrical pump plug 8 moves rightwards, liquid is squeezed out through the first one-way valve 13, the telescopic rod 12 is stretched to control the eccentric wheels 3 with different diameters to be on the plane of the cylindrical pump plug 8, the distance of one-time movement of the telescopic rod 12 is the same as the thickness of the eccentric wheels 3, the motor 11 is slowly rotated, the telescopic rod 12 provides certain pressure, when the cylindrical pump plug 8 contacts with the groove 4, the telescopic rod 12 extends, and the cylindrical pump plug 8 can be controlled through the motor 11.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims

1. The utility model provides a single cylinder plunger pump, includes outer guard box (1), motor (11), its characterized in that: a pump body shell (5) is fixedly connected to the right surface of the outer layer protection box (1), a cylindrical pump plug (8) is connected to the inner surface of the pump body shell (5) in a sliding mode, an oil outlet (2) is formed in the upper surface of the pump body shell (5), a first one-way valve (13) is fixedly connected to the inner surface of the oil outlet (2), and an oil inlet (6) is formed in the lower surface of the pump body shell (5);

the utility model discloses a motor protection device, including outer guard box (1), the end inner wall fixedly connected with distance sensor (15) of outer guard box (1), the rear surface fixedly connected with host computer (16) of outer guard box (1), the output fixedly connected with output shaft (10) of motor (11), the outer fixed surface of output shaft (10) is connected with eccentric wheel (3), the front surface of eccentric wheel (3) is provided with recess (4), recess (4) with cylindricality pump plug (8) sliding connection, the front surface fixedly connected with telescopic link (12) of motor (11).

2. A single cylinder plunger pump according to claim 1, characterized in that: a cavity (9) is formed between the cylindrical pump plug (8) and the pump body shell (5), and an end cover (7) is fixedly connected to the right surface of the pump body shell (5).

3. A single cylinder plunger pump according to claim 1, characterized in that: the number of the oil inlets (6) is multiple and distributed left and right, and the inner surface of each oil inlet (6) is fixedly connected with a second one-way valve (14).

4. A single cylinder plunger pump according to claim 1, characterized in that: the diameter of the cylindrical pump plug (8) is the same as the inner diameter of the pump body shell (5), and the left end of the cylindrical pump plug (8) extends to the outer side of the pump body shell (5).

5. A single cylinder plunger pump according to claim 1, characterized in that: the distance sensor (15) is electrically connected with the host (16), and the groove (4) is in sliding connection with the cylindrical pump plug (8).

6. A single cylinder plunger pump according to claim 1, characterized in that: the number of the eccentric wheels (3) is multiple and the eccentric wheels are distributed front and back, and the diameters of the eccentric wheels (3) decrease progressively from back to front.

7. A single cylinder plunger pump according to claim 1, characterized in that: the number of the telescopic rods (12) is two and the telescopic rods are distributed up and down, and the output ends of the telescopic rods (12) are fixedly connected with the rear surface of the outer-layer protection box (1).

8. A single cylinder plunger pump according to claim 1, characterized in that: and a seal is arranged between the pump body shell (5) and the cylindrical pump plug (8).