Plunger pump with precise and compact structure

Abstract

The utility model relates to the field of plunger pump structural design, in particular to a plunger pump with a precise and compact structure, which comprises a base plate, a valve body, a speed reducing motor, a sleeve rod, an eccentric wheel, a sealing sliding sleeve, a plunger rod and the like. A valve body is installed on the top of the base plate, a gear motor is installed on one side of the rear portion of the valve body, an output shaft of the gear motor extends into the rear portion in the valve body, a sleeve rod is rotationally arranged on one side in the valve body, an eccentric wheel is rotationally arranged in the sleeve rod, and the output shaft of the gear motor is connected with the eccentric wheel. A plunger rod is arranged in the middle in the sealing sliding sleeve. By means of the first sealing ring on the front portion of the plunger rod and the second sealing ring between the one-way valve and the inlet flange and the second sealing ring between the one-way valve and the outlet flange, the sealing performance of liquid in the conveying process is guaranteed, leakage is prevented, connection between the one-way valve and the flange connector is tighter, gaps at the position of a connector are reduced, and the whole pump body structure is more compact.

Description

Technical Field

[0001] The utility model relates to the field of plunger pump structure design, in particular to a plunger pump with a precise and compact structure. Background Art

[0002] The plunger pump is an important device in the hydraulic system. It relies on the reciprocating motion of the plunger in the cylinder to change the volume of the sealed working chamber to achieve oil suction and oil pressure.

[0003] Existing plunger pumps are usually bulky in design, with loose connections between components, resulting in a large overall size and occupying a lot of space. In applications where space is limited, such as ships and mobile equipment, large pump bodies are difficult to install and maintain. Moreover, after long-term operation, existing plunger pumps are prone to liquid leakage due to aging or wear of the sealing rings.

[0004] Therefore, it is urgent to design a plunger pump with precise and compact structure. Utility Model Content

[0005] In order to overcome the above-mentioned shortcomings of the prior art, the utility model provides a plunger pump with a precise and compact structure.

[0006] A plunger pump with precise and compact structure includes a base plate, a valve body, a reduction motor, a sleeve rod, an eccentric wheel, a sealing sleeve, a plunger rod, a sealing ring 1, a sealing ring 2, a one-way valve 1, a one-way valve 2, a baffle, an elastic member, an inlet flange and an outlet flange. The valve body is installed on the top of the base plate, a reduction motor is installed on one side of the rear of the valve body, the output shaft of the reduction motor extends into the rear of the valve body, a sleeve rod is rotatably provided on one side of the interior of the valve body, an eccentric wheel is rotatably provided inside the sleeve rod, the output shaft of the reduction motor is connected to the eccentric wheel, a sealing sleeve is provided at the end of the sleeve rod, and a sealing sleeve is provided in the middle of the sealing sleeve. A plunger rod is provided, the front of the plunger rod is adapted to the closed cavity of the valve body, a sealing ring 1 is embedded in the front of the plunger rod, and the two ends of the closed cavity in the front of the valve body are respectively connected to a one-way valve 1 and a one-way valve 2, and baffles are hinged between the two one-way valves and the closed cavity access end of the valve body, and elastic parts are provided on the upper part of the two one-way valves, the elastic parts in the one-way valve 1 and the one-way valve 2 are connected to their corresponding baffles, the outside of the two one-way valves are connected to inlet flanges, and the ends of the inlet flanges are connected to outlet flanges, and a sealing ring 2 is embedded in the joint of each inlet flange.

[0007] Optionally, it also includes electric valve 1, electric valve 2 and electric valve 3. The lower part of the one-way valve 2 is connected to the electric valve 1, the lower part of the closed cavity of the valve body is connected to the electric valve 2, and the lower part of the outlet flange of the one-way valve 1 is connected to the electric valve 3.

[0008] Optionally, it also includes an arc frame, a peristaltic tube, a stepper motor, a turntable, a pulley, a bolt and a screw, and a limit plate. An arc frame is provided on the top front side of the substrate, a peristaltic tube is provided on the upper inner part of the arc frame along the inner wall, a stepper motor is installed in the center of the top front side of the substrate, a turntable is provided on the output shaft of the stepper motor, pulleys are provided on both sides of the turntable for rotation, the pulleys are in rotational contact with the peristaltic tube, bolts and screws are provided on the outside of the mounting parts of the pulleys on both sides, and a limit plate for adjusting the rotation angle of the pulley is provided on the thread between the bolts and screws, and the limit plate is in conflict with the outside of the pulley.

[0009] Optionally, both ends of the peristaltic tube extend outward, one end of the peristaltic tube is cross-connected to the electric valve 1 and the electric valve 2, and the other end is directly connected to the electric valve 3.

[0010] Optionally, a Y-type filter is further included, and the Y-type filter is installed on the outlet flange of the second one-way valve.

[0011] Optionally, the Y-type filter is provided with at least two output ports.

[0012] The utility model has the following advantages: 1. The utility model ensures the sealing of the liquid during the transmission process through the sealing ring 1 at the front of the plunger rod and the sealing ring 2 between the one-way valve and the inlet flange and the outlet flange to prevent leakage. The connection between the one-way valve and the flange joint is tighter, the gap at the interface is reduced, and the entire pump body structure is more compact.

[0013] 2. This utility model can effectively discharge residual liquid in the pump body through the combined use of peristaltic tube and electric valve, avoiding problems such as corrosion, deposition and freezing; the multi-output port design of the Y-type filter improves the flexibility and reliability of liquid filtration, ensuring that the discharged liquid is clean and free of impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0015] Figure 2 It is a schematic sectional view of the three-dimensional structure of the valve body, reduction motor and roller-type double bearings of the utility model.

[0016] Figure 3 It is a three-dimensional structural cross-sectional diagram of the one-way valve 1, the one-way valve 2 and the flow plate of the utility model.

[0017] Figure 4 It is a three-dimensional structural diagram of the flange, sleeve and electric valve of the utility model.

[0018] Figure 5 It is a schematic diagram of the three-dimensional structure of the arc frame, U-shaped tube and stepping motor of the utility model.

[0019] Figure 6It is a schematic diagram of the three-dimensional structure of the turntable, pulley and bolt screw of the utility model.

[0020] In the accompanying drawings: 1. Base plate, 2. Valve body, 3. Reducer motor, 4. Sleeve rod, 5. Eccentric wheel, 6. Sealing sleeve, 7. Plunger rod, 71. Sealing ring 1, 72. Sealing ring 2, 8. One-way valve 1, 81. One-way valve 2, 9. Baffle, 10. Elastic part, 11. Inlet flange, 111. Outlet flange, 12. Electric valve 1, 121. Electric valve 2, 123. Electric valve 3, 13. Arc frame, 14. Peristaltic tube, 15. Stepper motor, 16. Turntable, 17. Pulley, 18. Bolt and screw, 19. Limit plate, 20. Y-type filter. DETAILED DESCRIPTION

[0021] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Example: A plunger pump with a precise and compact structure, such as Figure 1-Figure 5As shown, it includes a base plate 1, a valve body 2, a reduction motor 3, a sleeve rod 4, an eccentric wheel 5, a sealing sleeve 6, a plunger rod 7, a sealing ring 1 71, a sealing ring 2 72, a one-way valve 1 8, a one-way valve 2 81, a baffle 9, an elastic member 10, an inlet flange 11 and an outlet flange 111. The base plate 1 serves as the basic supporting structure of the entire plunger pump and provides an installation platform for other components. The valve body 2 is installed on the top of the base plate 1. The valve body 2 constitutes the working chamber of the pump and is equipped with key components such as the plunger rod 7. It is responsible for the suction and discharge process of the liquid. A reduction motor 3 is installed on one side of the rear of the valve body 2. The reduction motor 3 provides a power source and converts the high pressure liquid into a liquid through the reduction mechanism. The high-speed rotation is converted into a low-speed, high-torque motion suitable for driving the eccentric wheel 5. The output shaft of the reduction motor 3 extends into the rear part of the valve body 2. A sleeve rod 4 is provided on one side of the valve body 2 for rotation. The sleeve rod 4 converts the rotational motion into a linear reciprocating motion. An eccentric wheel 5 is provided for rotation inside the sleeve rod 4. The eccentric wheel 5 generates an eccentric force by rotation, which pushes the plunger rod 7 to reciprocate. The output shaft of the reduction motor 3 is connected to the eccentric wheel 5. A sealing sleeve 6 is provided at the end of the sleeve rod 4. The sealing sleeve 6 ensures the sealing of the plunger rod 7 during the reciprocating motion to prevent leakage of the working medium. A plunger rod 7 is provided in the middle of the sealing sleeve 6. The plunger rod 7 works in the closed cavity of the valve body 2. The reciprocating motion changes the volume of the closed cavity, thereby realizing the suction and discharge of the liquid. The front of the plunger rod 7 is adapted to the closed cavity of the valve body 2. A sealing ring 71 is embedded in the front of the plunger rod 7. The sealing ring 71 enhances the sealing performance between the plunger rod 7 and the valve body 2 to prevent liquid leakage. The two ends of the closed cavity in the front of the valve body 2 are respectively connected to a one-way valve 8 and a one-way valve 81. The two one-way valves control the one-way flow of the liquid to prevent liquid backflow. Among them, the one-way valve 8 is used for the suction process, and the one-way valve 81 is used for the discharge process. A baffle 9 is hinged between the two one-way valves and the closed cavity access end of the valve body 2 to control the liquid by changing the internal and external pressure difference. The inlet and outlet directions of the body, and elastic parts 10 are provided on the upper parts of the two one-way valves. The elastic parts 10 help the baffle 9 to remain closed when there is no pressure difference to prevent liquid backflow. The elastic parts 10 in the one-way valve 1 8 and the one-way valve 2 81 are connected to the corresponding baffle 9. The outsides of the two one-way valves are connected to inlet flanges 11, and the ends of the inlet flanges 11 are connected to outlet flanges 111. The inlet flanges 11 and the outlet flanges 111 serve as interfaces for the inlet and outlet of the liquid, which are convenient for connection to other piping systems. The butt joints of each inlet flange 11 are embedded with a sealing ring 2 72 to ensure the sealing between the inlet flange 11 and the outlet flange 111.

[0023] like Figure 1 and Figure 3As shown, it also includes an electric valve 12, an electric valve 2 121 and an electric valve 3 123. The lower part of the one-way valve 2 81 is connected to the electric valve 12, the lower part of the closed cavity of the valve body 2 is connected to the electric valve 2 121, and the lower part of the outlet flange 111 of the one-way valve 1 8 is connected to the electric valve 3 123. The three electric valves are used to control the flow direction of the liquid inside the pump body, especially when emptying the residual liquid in the pump body.

[0024] like Figure 5-Figure 6 As shown, it also includes an arc frame 13, a peristaltic tube 14, a stepper motor 15, a turntable 16, a pulley 17, a bolt screw 18 and a limit plate 19. The arc frame 13 is provided on the top front side of the substrate 1. The arc frame 13 provides fixation and support for the peristaltic tube 14 to ensure its correct position. The peristaltic tube 14 is arranged around the inner wall of the upper inner part of the arc frame 13. A stepper motor 15 is installed in the center of the top front side of the substrate 1. The stepper motor 15 provides power for the extrusion process of the peristaltic tube 14. The position of the pulley 17 is adjusted by precisely controlling the rotation of the turntable 16. The turntable 16 is provided on the output shaft of the stepper motor 15. Pulleys 17 are provided on both sides of the turntable 16 for rotation. The pulley 17 is in contact with the peristaltic tube 14 in rotation. The peristaltic tube 14 is squeezed by the pulley 17 driven by the stepping motor 15 to discharge the residual liquid in the pump body. Bolts and screws 18 are provided on the outside of the mounting parts of the pulleys 17 on both sides for adjusting the rotation angle of the pulley 17 to ensure that the pulley 17 applies appropriate squeezing force on the peristaltic tube 14. A limit plate 19 is provided between the threads of the bolts and screws 18 for adjusting the rotation angle of the pulley 17. The limit plate 19 conflicts with the outside of the pulley 17. The limit plate 19 limits the maximum rotation angle of the pulley 17 to prevent excessive squeezing of the peristaltic tube 14; both ends of the peristaltic tube 14 extend outward, one end of which is cross-connected with the electric valve 12 and the electric valve 2 121, and the other end is directly connected with the electric valve 3 123.

[0025] like Figure 1 As shown, a Y-type filter 20 is also included. The Y-type filter 20 is installed on the outlet flange 111 of the one-way valve 2 81, and the Y-type filter 20 is provided with at least two output ports. The Y-type filter 20 is used to filter impurities in the discharged liquid, improve the quality of the discharged liquid, and provide flexible discharge options through multiple output ports.

[0026] When the pump body is started, the reduction motor 3 starts to run, and its output shaft drives the eccentric wheel 5 to rotate. The rotation of the eccentric wheel 5 is transmitted to the plunger rod 7 through the sleeve rod 4 and the sealing sleeve 6, so that the plunger rod 7 makes reciprocating motion in the closed cavity of the valve body 2. When the plunger rod 7 moves outward, the volume of the closed cavity of the valve body 2 increases, and the internal pressure decreases. The baffle 9 of the one-way valve 8 turns downward under the action of the internal and external pressure difference, the liquid inlet channel opens, and the liquid enters the closed cavity of the valve body 2 through the inlet flange 11. The sealing ring in front of the plunger rod 7 The first one-way valve 71 ensures that the liquid will not leak from the contact surface between the plunger rod 7 and the closed cavity. When the plunger rod 7 moves inward, the volume of the closed cavity of the valve body 2 decreases, the internal pressure increases, and the baffle 9 of the one-way valve 81 turns upward under the action of the internal and external pressure difference. The liquid outlet channel opens and the liquid is discharged through the outlet flange 111. The elastic member 10 in the one-way valve ensures that the baffle 9 remains closed when there is no pressure difference to prevent the liquid from flowing back. The output shaft of the stepper motor 15 drives the turntable 16 to rotate, and the pulley 1 on the turntable 16 rotates. 7 contacts the peristaltic tube 14, and the peristaltic tube 14 is squeezed by the rolling of the pulley 17. The rolling of the pulley 17 causes the peristaltic tube 14 to deform, forcing the liquid in the tube to flow forward. The limit plate 19 adjusts the rotation angle of the pulley 17 through the bolt screw 18 to ensure that the squeeze force of the pulley 17 on the peristaltic tube 14 is moderate to prevent overpressure or underpressure. When the residual liquid in the pump body needs to be emptied, the electric valve 12 and the electric valve 2 121 are opened, and one end of the peristaltic tube 14 is connected to the two valves. Through the peristaltic tube 14 The residual liquid is discharged by squeezing. When the residual liquid behind the one-way valve 8 needs to be discharged, the electric valve 3 123 is opened, and the other end of the peristaltic tube 14 is connected to the valve. The residual liquid is discharged by squeezing the peristaltic tube 14. A Y-type filter 20 is installed on the outlet flange 111 of the one-way valve 2 81. The liquid passes through the Y-type filter 20 during the discharge process to filter out impurities therein. The Y-type filter 20 is provided with at least two output ports, and different output paths can be selected according to actual needs to improve flexibility.

[0027] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A plunger pump with a precise and compact structure, characterized by: The invention comprises a base plate (1), a valve body (2), a reduction motor (3), a sleeve rod (4), an eccentric wheel (5), a sealing sleeve (6), a plunger rod (7), a sealing ring 1 (71), a sealing ring 2 (72), a one-way valve 1 (8), a one-way valve 2 (81), a baffle (9), an elastic member (10), an inlet flange (11) and an outlet flange (111). The valve body (2) is installed on the top of the base plate (1), a reduction motor (3) is installed on one side of the rear of the valve body (2), the output shaft of the reduction motor (3) extends into the rear of the valve body (2), a sleeve rod (4) is rotatably provided on one side of the interior of the valve body (2), an eccentric wheel (5) is rotatably provided in the sleeve rod (4), the output shaft of the reduction motor (3) is connected to the eccentric wheel (5), a sealing sleeve (6) is provided at the end of the sleeve rod (4), and the sealing sleeve (6) A plunger rod (7) is provided in the middle of the inner portion, and the front portion of the plunger rod (7) is adapted to the closed cavity of the valve body (2). A sealing ring 1 (71) is embedded in the front portion of the plunger rod (7). The two ends of the closed cavity in the front portion of the valve body (2) are respectively connected to a one-way valve 1 (8) and a one-way valve 2 (81). A baffle (9) is hinged between the two one-way valves and the access end of the closed cavity of the valve body (2). An elastic member (10) is provided in the upper portion of the two one-way valves. The elastic member (10) in the one-way valve 1 (8) and the one-way valve 2 (81) is connected to the corresponding baffle (9). The outside of the two one-way valves is connected to an inlet flange (11), and the end of the inlet flange (11) is connected to an outlet flange (111). The joint of each inlet flange (11) is embedded with a sealing ring 2 (72).

2. A plunger pump with a precise and compact structure according to claim 1, characterized in that: The invention also includes an electric valve 1 (12), an electric valve 2 (121) and an electric valve 3 (123). The lower part of the one-way valve 2 (81) is connected to the electric valve 1 (12), the lower part of the closed cavity of the valve body (2) is connected to the electric valve 2 (121), and the lower part of the outlet flange (111) of the one-way valve 1 (8) is connected to the electric valve 3 (123).

3. A plunger pump with a precise and compact structure according to claim 2, characterized in that: The invention also includes an arc frame (13), a peristaltic tube (14), a stepper motor (15), a turntable (16), a pulley (17), a bolt and screw (18) and a limit plate (19). The arc frame (13) is provided on the front side of the top of the base plate (1). The peristaltic tube (14) is provided around the inner upper part of the arc frame (13) along the inner wall. The stepper motor (15) is installed at the center of the front side of the top of the base plate (1). The turntable (16) is provided on the output shaft of the stepper motor (15). Pulleys (17) are provided on both sides of the turntable (16) for rotation. The pulleys (17) are in rotational contact with the peristaltic tube (14). Bolts and screws (18) are provided on the outside of the mounting parts of the pulleys (17) on both sides. A limit plate (19) for adjusting the rotation angle of the pulley (17) is provided on the thread between the bolts and screws (18). The limit plate (19) is in conflict with the outside of the pulley (17).

4. A plunger pump with a precise and compact structure according to claim 3, characterized in that: Both ends of the peristaltic tube (14) extend outwards, one end of which is cross-connected with the electric valve 1 (12) and the electric valve 2 (121), and the other end of which is directly connected with the electric valve 3 (123).

5. A plunger pump with a precise and compact structure according to claim 4, characterized in that: The invention also comprises a Y-type filter (20), and the outlet flange (111) of the second one-way valve (81) is provided with the Y-type filter (20).

6. A plunger pump with a precise and compact structure according to claim 5, characterized in that: The Y-type filter (20) is provided with at least two output ports.

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