Plunger pump integrated with driving control mechanism

Abstract

The utility model relates to the field of plunger pumps, and discloses a plunger pump integrated with a drive control mechanism, which comprises a sealing plate and a shell, the right side of the sealing plate is fixedly connected with the shell, the right side of the shell is fixedly connected with a first sealing cover, the right side of the first sealing cover is fixedly connected with a second sealing cover, and a speed reducing mechanism is arranged in the shell. A driving motor is fixedly connected to the upper portion of the right surface of the shell, and a movement limiting device is fixedly connected to the inner surface of the first sealing cover. According to the utility model, the driving motor is used as a main power source, the integral size of the equipment is obviously reduced through the integrated combination of the encoder, the driving motor, the servo system and the plunger pump, and meanwhile, the movement speed and position of the plunger can be accurately controlled through the accurate feedback of the servo system, the driving motor and the encoder; and the step losing phenomenon possibly occurring due to the fact that a stepping motor is used in a traditional plunger pump is avoided, errors caused by the step losing phenomenon are reduced, and therefore the working precision of the plunger pump is improved.

Description

Technical Field

[0001] This utility model relates to the field of plunger pumps, and more particularly to a plunger pump with an integrated drive control mechanism. Background Technology

[0002] A piston pump is a common positive displacement pump that relies on the reciprocating motion of pistons within a cylinder to achieve oil suction and pressure. Piston pumps offer advantages such as high pressure, high efficiency, and convenient flow rate adjustment, and are widely used in hydraulic systems, petrochemicals, and construction machinery. Based on the piston arrangement, they can be divided into radial piston pumps and axial piston pumps. Radial piston pumps have a larger radial dimension and a more complex structure; axial piston pumps have a compact structure, higher speed, and are more widely used.

[0003] In the prior art, when the plunger moves outward, the sealed volume of the cylinder increases, creating a negative pressure. Under atmospheric pressure, the oil enters the cylinder through the oil suction port. When the plunger moves inward, the sealed volume decreases, the oil is squeezed out, and discharged through the oil discharge port. During this process, a stepper motor is used to drive the movement of the plunger.

[0004] However, in actual use, since the existing technology uses a stepper motor as the power source for the device, the stepper motor will experience some step loss due to its own design problems during long-term use, which will affect the actual working accuracy of the plunger pump. Especially in the process of transporting small doses of liquid, the accuracy problem caused by step loss will be further amplified. Therefore, a plunger pump with an integrated drive control mechanism is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a plunger pump with an integrated drive control mechanism, which aims to improve the problem that stepper motors in the prior art will experience partial step loss due to their own design problems, thus affecting the actual working accuracy of the plunger pump.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a plunger pump with an integrated drive control mechanism, comprising a sealing plate and a housing, wherein the housing is fixedly connected to the right side of the sealing plate, a first sealing cover is fixedly connected to the right side of the housing, a second sealing cover is fixedly connected to the right side of the first sealing cover, a reduction mechanism is provided inside the housing, a drive motor is fixedly connected to the upper part of the right surface of the housing, a motion limiting device is fixedly connected to the inner surface of the first sealing cover, a lead screw is rotatably connected to the lower part of the inner surface of the first sealing cover, a plunger is threadedly connected to the outer arc surface of the lead screw, and an encoder is fixedly connected to the inner surface of the sealing plate;

[0007] The motion limiting device includes a mounting plate, a photoelectric sensor is slidably connected to the lower surface of the mounting plate, positioning bolts are threaded to both ends of the photoelectric sensor, and a light-blocking column is fixedly connected to the upper part of the outer arc surface of the plunger.

[0008] As a further description of the above technical solution:

[0009] A connecting pipe is fixedly connected to the right side of the second sealing cover. The output shaft of the drive motor is connected to the reduction mechanism, and the output shaft of the encoder is fixedly connected to the lead screw.

[0010] As a further description of the above technical solution:

[0011] The outer arc surface of the plunger is connected to the inner wall piston of the sealing cover, and multiple sets of arc-shaped through holes are opened on the inner side of the outer shell.

[0012] As a further description of the above technical solution:

[0013] The lower part of the first sealing cover has a through slot, and the left side of the second sealing cover has a through opening.

[0014] As a further description of the above technical solution:

[0015] The first sealing cover is connected to the second sealing cover. The second sealing cover has a through hole on its right side. The lower part of the deceleration mechanism is fixedly connected to the lead screw.

[0016] As a further description of the above technical solution:

[0017] A rectangular groove is provided on the lower surface of the mounting plate, and rectangular grooves are provided on both the front and rear sides of the lower surface of the mounting plate.

[0018] As a further description of the above technical solution:

[0019] The mounting plate has threaded holes spaced at equal intervals inside a rectangular groove on its lower surface, and the upper part of the positioning bolt is threadedly connected to the mounting plate.

[0020] As a further description of the above technical solution:

[0021] The photoelectric sensors are provided in two sets, located on the left and right sides of the lower surface of the mounting plate, respectively, and the light-blocking column is located at the center line of the two sets of photoelectric sensors.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, a drive motor is used as the main power source, and the overall size of the equipment is significantly reduced through the integrated combination of encoder, drive motor, servo system and plunger pump. At the same time, through the precise feedback of servo system drive motor and encoder, the movement speed and position of plunger can be precisely controlled, avoiding the step loss phenomenon that may occur in traditional plunger pumps using stepper motors and reducing the errors caused by them, thereby improving the working accuracy of plunger pump.

[0024] 2. In this invention, the photoelectric sensor in the motion limiting device, in conjunction with the light-blocking column, can monitor the plunger's movement status in real time. When the plunger moves the light-blocking column into the sensing range of the photoelectric sensor, the sensor emits a signal. This signal can be received and processed by the control system, thereby achieving precise control of the plunger's position. This design not only improves the working accuracy of the plunger pump but also enhances its stability and reliability. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a plunger pump with an integrated drive control mechanism proposed in this utility model.

[0026] Figure 2 This is a schematic diagram of the internal structure of a piston pump with an integrated drive control mechanism proposed in this utility model.

[0027] Figure 3 This is a schematic diagram of the internal deceleration mechanism of the cap of a plunger pump with an integrated drive control mechanism proposed in this utility model.

[0028] Figure 4 This is a schematic diagram of the encoder of a plunger pump with an integrated drive control mechanism proposed in this utility model.

[0029] Legend:

[0030] 1. Sealing plate; 2. Motion limiting device; 3. Housing; 4. Sealing cover one; 5. Sealing cover two; 6. Lead screw; 7. Plunger; 8. Reduction mechanism; 9. Drive motor; 10. Connecting pipe; 201. Light blocking column; 202. Photoelectric sensor; 203. Positioning bolt; 204. Mounting plate. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figure 1 - Figure 4 An embodiment of this utility model is provided: a plunger pump with an integrated drive control mechanism, including a sealing plate 1 and a housing 3. The housing 3 is fixedly connected to the right side of the sealing plate 1, a sealing cover 4 is fixedly connected to the right side of the housing 3, a sealing cover 5 is fixedly connected to the right side of the sealing cover 4, a reduction mechanism 8 is provided inside the housing 3, a drive motor 9 is fixedly connected to the upper right surface of the housing 3, a motion limiting device 2 is fixedly connected to the inner surface of the sealing cover 4, a lead screw 6 is rotatably connected to the lower inner surface of the sealing cover 4, a plunger 7 is threadedly connected to the outer arc surface of the lead screw 6, and an encoder 11 is fixedly connected to the inner surface of the sealing plate 1.

[0033] The motion limiting device 2 includes a mounting plate 204, a photoelectric sensor 202 is slidably connected to the lower surface of the mounting plate 204, and positioning bolts 203 are threaded to both the front and rear ends of the photoelectric sensor 202. A light-blocking column 201 is fixedly connected to the upper part of the outer arc surface of the plunger 7.

[0034] A connecting pipe 10 is fixedly connected to the right side of the second sealing cover 5. This connecting pipe 10 is used to transfer and transport the liquid inside the first sealing cover 4. The output shaft of the drive motor 9 is connected to the reduction mechanism 8, which is connected to the encoder 11. Therefore, it can synchronously monitor and read the rotation angle and number of turns of the end screw 6 during the deceleration process. The output shaft of the encoder 11 is fixedly connected to the screw 6. The outer arc surface of the plunger 7 is connected to the piston of the inner wall of the second sealing cover 5. Multiple sets of arc-shaped through holes are opened on the inner side of the outer shell 3, so that multiple sets of gears inside the reduction mechanism 8 can be accommodated. A through slot is opened at the lower part of the first sealing cover 4, and a through opening is opened on the left side of the second sealing cover 5, so that the first sealing cover 4 and the second sealing cover 5 can communicate with each other through the opening. The first sealing cover 4 and the second sealing cover 5 are connected. A through round hole is opened on the right side of the second sealing cover 5. The lower part of the reduction mechanism 8 is fixedly connected to the screw 6. The rotation at the output shaft of the drive motor 9 can be reduced and transmitted to the lead screw 6. A rectangular groove is provided on the lower surface of the mounting plate 204, which can accommodate the photoelectric sensor 202 to slide inside it. Rectangular grooves are provided on both the front and rear sides of the lower surface of the mounting plate 204. Threaded holes are provided at equal intervals inside the rectangular grooves on the lower surface of the mounting plate 204, so that the positioning bolts 203 can be inserted into the threaded holes at specified intervals, thereby realizing the position adjustment of the photoelectric sensor 202. The upper part of the positioning bolts 203 is threadedly connected to the mounting plate 204. Two sets of photoelectric sensors 202 are provided, which are located on the left and right sides of the lower surface of the mounting plate 204, respectively. Therefore, the maximum and minimum movement positions of the plunger 7 can be limited. The light-blocking column 201 is located at the center line of the two sets of photoelectric sensors 202. Therefore, during the movement of the plunger 7, the light-blocking column 201 can be driven synchronously to block the photoelectric sensor 202 and make it send a positioning signal.

[0035] Working Principle: When using this device, the drive motor 9 needs to be started by program control. At this time, the drive motor 9 will drive the gears in the reduction mechanism 8 to rotate through the output shaft, and drive the lead screw 6 to rotate. When the lead screw 6 rotates, it will push the plunger 7 to move on its outer arc surface. At the same time, when the plunger 7 moves, it will drive the light blocking column 201 on its outer arc surface to move. When the light blocking column 201 moves to the inside of the photoelectric sensor 202 and blocks the transmitted light, the photoelectric sensor 202 will transmit the feedback signal to the drive motor 9 and control it to stop moving, thus limiting the movement range of the plunger 7. At the same time, the encoder in the reduction mechanism 8 will record the rotation angle of the lead screw 6 and transmit the signal to the drive motor 9 after the lead screw 6 rotates to the specified angle. Thus, the rotation angle of the lead screw 6 is precisely limited by the feedback signals of the encoder and the photoelectric sensor 202. In addition, with the movement of the plunger 7, the connecting pipe 10 will complete the transfer of liquid.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A plunger pump with an integrated drive control mechanism, comprising a sealing plate (1) and a housing (3), characterized in that: The sealing plate (1) is fixedly connected to the right side of the outer shell (3), the outer shell (3) is fixedly connected to the right side of the sealing cover one (4), the sealing cover one (4) is fixedly connected to the right side of the sealing cover two (5), the inner side of the outer shell (3) is provided with a deceleration mechanism (8), the upper right surface of the outer shell (3) is fixedly connected to a drive motor (9), the inner surface of the sealing cover one (4) is fixedly connected to a motion limiting device (2), the lower inner surface of the sealing cover one (4) is rotatably connected to a lead screw (6), the outer arc surface of the lead screw (6) is threadedly connected to a plunger (7), and the inner surface of the sealing plate (1) is fixedly connected to an encoder (11). The motion limiting device (2) includes a mounting plate (204), a photoelectric sensor (202) is slidably connected to the lower surface of the mounting plate (204), and positioning bolts (203) are threaded to both the front and rear ends of the photoelectric sensor (202). A light-blocking column (201) is fixedly connected to the upper part of the outer arc surface of the plunger (7).

2. The plunger pump with an integrated drive control mechanism according to claim 1, characterized in that: A connecting pipe (10) is fixedly connected to the right side of the second sealing cover (5), the output shaft of the drive motor (9) is connected to the reduction mechanism (8), and the output shaft of the encoder (11) is fixedly connected to the lead screw (6).

3. A plunger pump with an integrated drive control mechanism according to claim 1, characterized in that: The outer arc surface of the plunger (7) is connected to the inner wall piston of the sealing cover (5), and multiple sets of arc-shaped through holes are opened on the inner side of the outer shell (3).

4. A plunger pump with an integrated drive control mechanism according to claim 1, characterized in that: The lower part of the sealing cover one (4) has a through slot, and the left side of the sealing cover two (5) has a through opening.

5. A plunger pump with an integrated drive control mechanism according to claim 1, characterized in that: The first sealing cover (4) is connected to the second sealing cover (5). The second sealing cover (5) has a through hole on its right side. The lower part of the deceleration mechanism (8) is fixedly connected to the lead screw (6).

6. A plunger pump with an integrated drive control mechanism according to claim 1, characterized in that: A rectangular groove is provided on the lower surface of the mounting plate (204), and rectangular grooves are provided on both the front and rear sides of the lower surface of the mounting plate (204).

7. A plunger pump with an integrated drive control mechanism according to claim 1, characterized in that: The mounting plate (204) has threaded holes spaced at equal intervals in the rectangular groove on its lower surface, and the upper part of the positioning bolt (203) is threadedly connected to the mounting plate (204).

8. A plunger pump with an integrated drive control mechanism according to claim 1, characterized in that: Two sets of photoelectric sensors (202) are provided, and are located on the left and right sides of the lower surface of the mounting plate (204), respectively. The light-blocking column (201) is located at the center line of the two sets of photoelectric sensors (202).

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