Servo three-plunger constant-flow liquid injection metering pump

Abstract

The utility model provides a servo three-plunger constant flow liquid injection metering pump, which comprises a three-axis linkage driving assembly, a servo motor, a piston assembly and a one-way valve, the three-axis linkage driving assembly comprises a driving main body, a driving seat and a cam shaft, the driving seat and the cam shaft are arranged in the driving main body, and the driving seat is positioned in the driving main body and reciprocates through the cam shaft; the piston assembly comprises a piston sleeve and a plunger movably penetrating through the piston sleeve, one end of the piston sleeve abuts against the driving body, and the other end of the piston sleeve is connected with a pump body. According to the utility model, the three driving seats are controlled to linearly move back and forth through the three cam mechanisms which are precisely and uniformly distributed, so that the three plungers are uniformly distributed according to a time sequence to move back and forth, and the optimal liquid injection effect is achieved by matching with the precisely controlled plunger linear movement; by means of the three-axis linkage driving assembly and the servo motor, control over accurate front-back movement of the three plungers is achieved, and therefore very accurate and constant flow output is provided within the extremely small flow range.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid injection metering pumps, in particular to a servo three-plunger constant-flow liquid injection metering pump. Background Art

[0002] In the field of liquid transportation and metering, especially when it comes to the precise metering and ingredient infusion of medium and high viscosity media and liquids containing solid particles, it is necessary to use a metering pump that can provide accurate volume output. Traditional metering pumps may not be able to meet high-precision requirements, especially in situations where it is necessary to very accurately control the volume output in a small range; in addition, for plunger metering pumps, how to ensure the stable and precise back and forth movement of the plunger to achieve a constant flow output is a technical challenge in the design and manufacturing process.

[0003] Some possible deficiencies in the prior art include:

[0004] 1. Flow control is not precise enough: Traditional metering pumps may be difficult to accurately control within a very small flow range, resulting in flow fluctuations and unable to meet the needs of precise metering.

[0005] 2. Complex structure and inconvenient maintenance: Some metering pumps are complex in design, require frequent maintenance, and are not ideal for handling media with medium to high viscosity or containing solid particles, which can easily cause wear or blockage.

[0006] 3. Limited adaptability: A specific type of metering pump may only be suitable for a certain type of medium or flow range, lacking flexibility and wide adaptability.

[0007] 4. The driving mechanism is simple and cannot achieve synchronous and precise driving of multiple plungers: Simple driving mechanism may lead to poor synchronization of plunger movement, thus affecting the overall metering accuracy and stability.

[0008] Therefore, in order to solve the above problems and meet the industrial demand for high-precision, strong adaptability, and the ability to handle small-volume metering of medium- and high-viscosity liquids containing solid particles, it is particularly necessary to develop a new type of constant-flow injection metering pump. Utility Model Content

[0009] The utility model aims to provide a servo three-plunger constant-flow liquid injection metering pump, aiming to solve the problems of the existing metering pumps in accurately controlling the delivery and metering of small-volume medium-high viscosity or solid particle-containing liquids, such as inaccurate flow control, complex structure, difficult maintenance, limited adaptability, and inability to achieve multi-plunger synchronous precise driving.

[0010] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0011] A servo three-plunger constant-flow liquid injection metering pump is provided, comprising:

[0012] A three-axis linkage drive assembly, the three-axis linkage drive assembly includes a drive body, a drive seat and a camshaft arranged inside the drive body, the drive seat is located in the drive body and reciprocates through the camshaft, the drive seat is connected to the drive shaft, and the drive shaft passes through the drive body;

[0013] A servo motor, wherein the servo motor is connected to one end of the driving body through a motor seat, and a motor shaft of the servo motor is connected to the camshaft;

[0014] A piston assembly, the piston assembly comprising a piston sleeve and a plunger movably disposed in the piston sleeve, one end of the piston sleeve abutting against the driving body, the other end of the piston sleeve connected to the pump body, one end of the plunger connected to the driving shaft, the other end of the plunger movably disposed in the interior of the pump body;

[0015] One-way valve, two groups of one-way valves are provided, which are respectively arranged at the input end and the output end of the pump body. One of the one-way valves is located at the opposite end of the pump body and is connected through an output channel, and one end of the output channel is connected to an output connector. The other one-way valve is located at the opposite end of the pump body and is connected through an input channel, and one end of the input channel is connected to an input connector.

[0016] Preferably, the camshaft is inserted into the driving body, and a driving seat is provided between the cam of the camshaft and the driving body.

[0017] Preferably, a coupling is provided inside the motor base, and the motor shaft of the servo motor is connected to the camshaft through the coupling.

[0018] Preferably, one end of the one-way valve core toward the output channel is penetrated by a spring, and the other end is sleeved with a sealing ring toward the pump body; another end of the one-way valve core toward the pump body is penetrated by a spring, and the other end is sleeved with a sealing ring toward the input channel.

[0019] Preferably, a chuck is provided between one end of the plunger and the driving shaft, and a plunger sealing ring is sleeved on the outer periphery of the other end of the plunger.

[0020] Preferably, each end corner of the pump body is connected to the driving body via a tightening rod, so that the piston assembly is fixedly arranged between the pump body and the driving body.

[0021] Preferably, the bottom of the driving body is connected to a base.

[0022] Preferably, the one-way valve comprises a valve seat and a one-way valve core movably inserted into the interior of the valve seat, and a spring is inserted between one end of the one-way valve core and the interior of the valve seat.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] The utility model provides a servo three-plunger constant-flow liquid injection metering pump, which controls the forward and backward linear motion of three linear drives through a precisely evenly distributed three-cam mechanism, thereby driving the three plungers to evenly distribute forward and backward motion in a time sequence, and cooperates with the precisely controlled linear motion of the plungers to achieve the best liquid injection effect; utilizes a three-axis linkage drive component and a servo motor to achieve precise control of the forward and backward motion of the three plungers, thereby providing a very accurate and constant flow output within a very small flow range; by integrating the three-axis linkage drive component and the servo motor, the complexity of the metering pump is reduced, and the need for frequent maintenance is reduced, and at the same time, it also helps to reduce the wear or blockage problems caused by medium and high viscosity or solid particle-containing media; because the metering pump can accurately control the delivery of a small range of volume, it can adapt to the requirements of different types of media and flow ranges, providing flexibility and wide adaptability, and the use of the three-axis linkage drive component in conjunction with the servo motor can realize the synchronous and precise driving of multiple plungers, ensuring the synchronization and stability of the plunger movement, thereby improving the overall metering accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 It is a three-dimensional diagram of the utility model;

[0027] Figure 2 This is an exploded structural diagram of the servo motor and the driving body of the utility model;

[0028] Figure 3 This is an exploded structural diagram of the driving body and the camshaft of the utility model;

[0029] Figure 4 This is an exploded structural diagram of the driving body and the driving seat of the utility model;

[0030] Figure 5 It is a cross-sectional view of the piston assembly, pump body and one-way valve of the utility model.

[0031] In the figure: 1. three-axis linkage drive assembly; 2. drive body; 3. drive seat; 4. camshaft; 5. drive shaft; 6. servo motor; 7. motor seat; 8. coupling; 9. piston assembly; 10. piston sleeve; 11. plunger; 12. one-way valve; 13. valve seat; 14. one-way valve core; 15. spring; 16. output channel; 17. output connector; 18. input channel; 19. input connector; 20. sealing ring; 21. chuck; 22. tightening rod; 23. base; 24. pump body; 25. plunger sealing ring. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0035] Combine the following Figures 1 to 5 The utility model describes a servo three-plunger constant-flow liquid injection metering pump.

[0036] like Figures 1 to 5 As shown, the utility model provides a servo three-plunger constant flow liquid injection metering pump, comprising:

[0037] A three-axis linkage drive assembly 1, the three-axis linkage drive assembly 1 includes a drive body 2, a drive seat 3 and a camshaft 4 arranged inside the drive body 2, the drive seat 3 is located in the drive body 2 and reciprocates through the camshaft 4, the drive seat 3 is connected to the drive shaft 5, and the drive shaft 5 passes through the drive body 2;

[0038] A servo motor 6, wherein the servo motor 6 is connected to one end of the driving body 2 through a motor base 7, and a motor shaft of the servo motor 6 is connected to the cam shaft 4;

[0039] The piston assembly 9 includes a piston sleeve 10 and a plunger 11 movably disposed in the piston sleeve 10, one end of the piston sleeve 10 abuts against the driving body 2, the other end of the piston sleeve 10 is connected to the pump body 24, one end of the plunger 11 is connected to the driving shaft 5, and the other end of the plunger 11 is movably disposed in the pump body 24;

[0040] One-way valve 12, two groups of one-way valve 12 are provided, which are respectively arranged at the input end and the output end of the pump body 24. The one-way valve 12 includes a valve seat 13 and a one-way valve core 14 movably penetrated inside the valve seat 13. A spring 15 is penetrated between one end of the one-way valve core 14 and the inside of the valve seat 13. One of the one-way valves 12 is located at the end opposite to the pump body 24 and is connected through an output channel 16. One end of the output channel 16 is connected to an output connector 17. The other one-way valve 12 is located at the end opposite to the pump body 24 and is connected through an input channel 18. One end of the input channel 18 is connected to an input connector 19.

[0041] The utility model is a plunger 11-type metering pump with proportional throughput. Through a precisely evenly distributed three-cam mechanism, three linear drives are controlled to move forward and backward, thereby driving the three plungers 11 to move forward and backward evenly in time sequence. With the precisely controlled linear movement of the plunger 11, the best liquid injection effect is achieved. The utility model is specially designed and manufactured for the precise metering and ingredient infusion of medium and high viscosity medium liquids and liquids containing solid particles. The volume throughput range is 0 to 3 ml, and the medium liquid throughput volume is extremely accurate.

[0042] Before the normal liquid injection process, the pump should be filled and run until all the air in the pipeline is exhausted. For liquids with high gas content, the liquid should be exhausted before use. The exhaust method can be vacuuming, stirring, etc.

[0043] The working principle of a single set of plungers 11 and pump heads: During the normal liquid injection process, the motor drives the cam mechanism to drive the plunger 11 to move forward and backward in a straight line. When the plunger 11 moves backward, a negative liquid pressure is generated to open the input check valve 12, and the output check valve 12 is closed, so that the liquid is sucked into the pump chamber from the input channel 18; when the plunger 11 moves forward, a positive liquid pressure is generated to close the input check valve 12, and the output check valve 12 is opened, so that the liquid in the pump chamber is pushed out of the output channel 16.

[0044] Three sets of plungers 11 and pump heads are connected in parallel to the centralized input and output channels 16. The three cam mechanisms driven by the motor are evenly distributed and run, respectively driving the three plungers 11 to run forward and backward. The liquid output by each set of plungers 11 pump heads is accumulated to the total output channel 16, achieving a uniform output effect.

[0045] Preferably, the camshaft 4 is inserted into the driving body 2, and a driving seat 3 is arranged between the cam of the camshaft 4 and the driving body 2. The camshaft 4 is a shaft with one or more cams, and these cams are used to convert rotary motion into reciprocating (linear) motion. In the present technical solution, the camshaft 4 is provided with three cams, which are respectively used to push the driving seat 3 in contact therewith to make linear motion; the driving body 2 is a shell or frame that accommodates the camshaft 4 and the driving seat 3, providing the structural basis of the entire action assembly. The driving seat 3 is located in the driving body 2, and reciprocates through the cam on the camshaft 4. When the servo motor 6 is activated, it will rotate the motor shaft, thereby driving the camshaft 4 to rotate. As the camshaft 4 rotates, the cam will push the driving seat 3 to move linearly along a specific path.

[0046] Preferably, a coupling 8 is provided inside the motor seat 7, and the motor shaft of the servo motor 6 is connected to the camshaft 4 through the coupling 8. The motor seat 7 is a bracket or base 23 for fixing the servo motor 6, providing a structural connection between the drive motor and the three-axis linkage drive assembly 1. A cavity capable of accommodating the coupling 8 is provided inside the motor seat 7; the camshaft 4 receives power from the servo motor 6 through the coupling 8, thereby rotating. The rotation of the camshaft 4 drives the drive seat 3 in contact with it to perform linear reciprocating motion, and then the plunger 11 is synchronously moved forward and backward inside the pump body 24 through the drive shaft 5.

[0047] Preferably, a one-way valve core 14 is provided with a spring 15 at one end facing the output channel 16, and a sealing ring 20 is sleeved on the other end facing the pump body 24; another one-way valve core 14 is provided with a spring 15 at one end facing the pump body 24, and a sealing ring 20 is sleeved on the other end facing the input channel 18. When the plunger 11 moves backward, a liquid negative pressure is generated to open the input one-way valve 12, and the output one-way valve 12 is closed, so that the liquid is sucked into the pump chamber from the input channel 18; when the plunger 11 moves forward, a liquid positive pressure is generated to close the input one-way valve 12, and the output one-way valve 12 is opened, so that the liquid in the pump chamber is pushed out of the output channel 16.

[0048] Preferably, a chuck 21 is provided between one end of the plunger 11 and the drive shaft 5, and a plunger seal 25 is sleeved around the outer periphery of the other end of the plunger 11. The chuck 21 is a mechanical device used to fix one end of the plunger 11 to the drive shaft 5. The plunger 11 assembly is connected to the drive shaft 5 through the chuck 21 and is sealed by the plunger seal 25. Such a design enables the plunger 11 to move back and forth accurately inside the pump body 24. When the servo motor 6 is activated, the power transmitted through the coupling 8, the camshaft 4 and the drive seat 3 causes the drive shaft 5 and the plunger 11 to reciprocate synchronously, thereby sucking in and discharging liquid.

[0049] Preferably, each end corner of the pump body 24 is connected to the driving body 2 through a tightening rod 22, so that the piston assembly 9 is fixedly arranged between the pump body 24 and the driving body 2. The pump body 24 is a major component of the metering pump, and a chamber is formed inside the pump body 24 for the liquid to be sucked in and discharged. The plunger 11 reciprocates inside the pump body 24 to achieve the metering and delivery of the liquid. The tightening rod is used to fix the pump body 24 to the driving body 2. The tightening rod 22 not only plays a fixing role, but also helps to maintain the correct alignment between the pump body 24 and the driving body 2, thereby ensuring the smooth movement of the plunger 11.

[0050] Preferably, a base 23 is connected to the bottom of the driving body 2 .

[0051] The utility model provides a servo three-plunger 11 constant-flow liquid injection metering pump, which controls the forward and backward linear motion of three linear drives through a precisely evenly distributed three-cam mechanism, thereby driving the three plungers 11 to run evenly forward and backward in time sequence, and cooperates with the precisely controlled linear motion of the plungers 11 to achieve the best liquid injection effect; utilizes a three-axis linkage drive component 1 and a servo motor 6 to achieve precise control of the forward and backward motion of the three plungers 11, thereby providing a very accurate and constant flow output within a very small flow range; by integrating the three-axis linkage drive component 1 and the servo motor 6, the complexity of the metering pump is reduced, and the need for frequent maintenance is reduced, and at the same time, it also helps to reduce the wear or blockage problems caused by medium and high viscosity or solid particle-containing media; because the metering pump can accurately control the delivery of a small range of volume, it can adapt to the requirements of different types of media and flow ranges, providing flexibility and wide adaptability, and the use of the three-axis linkage drive component 1 in conjunction with the servo motor 6 can achieve synchronous and precise driving of multiple plungers 11, ensuring the synchronization and stability of the movement of the plungers 11, thereby improving the overall metering accuracy.

[0052] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A servo three-plunger constant flow liquid injection metering pump, characterized in that: include: A three-axis linkage drive assembly, the three-axis linkage drive assembly includes a drive body, a drive seat and a camshaft arranged inside the drive body, the drive seat is located in the drive body and reciprocates through the camshaft, the drive seat is connected to the drive shaft, and the drive shaft passes through the drive body; A servo motor, wherein the servo motor is connected to one end of the driving body through a motor seat, and a motor shaft of the servo motor is connected to the camshaft; A piston assembly, the piston assembly comprising a piston sleeve and a plunger movably disposed in the piston sleeve, one end of the piston sleeve abutting against the driving body, the other end of the piston sleeve connected to the pump body, one end of the plunger connected to the driving shaft, the other end of the plunger movably disposed in the interior of the pump body; One-way valve, two groups of one-way valves are provided, which are respectively arranged at the input end and the output end of the pump body. One of the one-way valves is located at the opposite end of the pump body and is connected through an output channel, and one end of the output channel is connected to an output connector. The other one-way valve is located at the opposite end of the pump body and is connected through an input channel, and one end of the input channel is connected to an input connector.

2. A servo three-plunger constant flow liquid injection metering pump according to claim 1, characterized in that: The camshaft is inserted into the driving body, and a driving seat is arranged between the cam of the camshaft and the driving body.

3. A servo three-plunger constant flow liquid injection metering pump according to claim 1, characterized in that: A coupling is arranged inside the motor seat, and the motor shaft of the servo motor is connected to the camshaft through the coupling.

4. A servo three-plunger constant flow liquid injection metering pump according to claim 1, characterized in that: One end of the one-way valve core toward the output channel is penetrated by a spring, and the other end is sleeved with a sealing ring toward the pump body; another end of the one-way valve core toward the pump body is penetrated by a spring, and the other end is sleeved with a sealing ring toward the input channel.

5. A servo three-plunger constant flow liquid injection metering pump according to claim 1, characterized in that: A chuck is arranged between one end of the plunger and the driving shaft, and a plunger sealing ring is sleeved on the outer periphery of the other end of the plunger.

6. A servo three-plunger constant flow liquid injection metering pump according to claim 1, characterized in that: Each end corner of the pump body is connected to the driving body through a tightening rod, so that the piston assembly is fixedly arranged between the pump body and the driving body.

7. A servo three-plunger constant flow liquid injection metering pump according to claim 1, characterized in that: The bottom of the driving body is connected with a base.

8. The servo three-plunger constant flow liquid injection metering pump according to claim 1, characterized in that: The one-way valve comprises a valve seat and a one-way valve core movably arranged inside the valve seat, and a spring is arranged between one end of the one-way valve core and the inside of the valve seat.

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