Infusion pump

Abstract

The utility model belongs to the technical field of oil pumps, and particularly relates to an infusion pump which comprises a pump body and a motor used for driving the pump body, the pump body is provided with a liquid inlet and a liquid outlet, the motor is electrically connected with a controller and comprises an output shaft, one end of the output shaft is connected with the pump body, and the other end of the output shaft is provided with a detection portion. The controller is connected with a detection device corresponding to the detection part; the motor is controlled to be started, the output shaft drives the pump body to move and drives the detection part to rotate, the detection device determines the workload of the pump body by detecting the movement of the detection part and counting the number of rotation turns of the output shaft through the controller, and the infusion pump is convenient to use and capable of conveying quantitative liquid.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil pumps, and particularly relates to a liquid extraction pump. Background Art

[0002] The liquid extraction pump is an ideal tool for transporting gasoline, kerosene, diesel, and light fuel oil. It is simple to operate and has stable pump performance.

[0003] Most of the liquid extraction pumps on the market include a motor and a pump body. During use, the pump body is driven by the motor. For example, an eccentric vane wheel pump disclosed in Chinese Utility Model Patent CN202321966459.8 includes: a pump cover, a wiper blade, a rotating wheel, a pump housing, a motor, a pump cover sealing ring, pump cover screws, and motor fixing screws; the motor is connected to the bottom of the pump housing and the rotating wheel, the rotating wheel is fixed to the bottom of the pump housing, a notch is provided on the side wall of the rotating wheel, the wiper blade end of the wiper blade is embedded in the notch of the rotating wheel, and the other end is a fixed end fixed to the shaft hole of the pump cover; the motor rotates to drive the rotating wheel to rotate, and the power provided by the rotation of the rotating wheel makes the wiper blade move in a circular motion around the inner wall of the pump housing. The wiper blade can automatically extend and retract during rotation through the notch of the rotating wheel. The arc-shaped structure of the wiper blade end reduces the wear with the inner wall, and the fixation with the pump cover prevents the wiper blade from slipping due to inflexibility. The sealing ring ensures the sealing of the cavity. The overall equipment structure is simple, saves materials, is convenient for installation and disassembly, saves maintenance costs, and improves work efficiency.

[0004] When the above structure is used, the user can only control the start and stop of the eccentric vane wheel pump, and the user cannot know the delivery volume of the eccentric vane wheel pump, which is not convenient for the user to quantitatively transport liquid through the eccentric vane wheel pump. Summary of the Invention

[0005] In order to overcome the defects in the prior art, the purpose of the utility model is to provide a liquid extraction pump that is convenient to use and can transport a fixed amount of liquid.

[0006] The purpose of the utility model is achieved as follows:

[0007] A liquid extraction pump includes a pump body and a motor for driving the pump body. The pump body is provided with a liquid inlet and a liquid outlet. A controller is electrically connected to the motor. The motor includes an output shaft. One end of the output shaft is connected to the pump body, and a detection part is provided at the other end of the output shaft. A detection device corresponding to the detection part is connected to the controller; when the motor is turned on, the output shaft drives the pump body to move and drives the detection part to rotate. The detection device detects the movement of the detection part and counts the number of rotations of the output shaft through the controller, so as to determine the workload of the pump body.

[0008] The utility model is further provided that: the pump body is a metering pump, and when the output shaft rotates one week, the pump body transports a certain amount of liquid.

[0009] The present utility model is further configured as: the motor is a stepper motor or a servo motor, and the controller can control the motor to rotate a set number of turns.

[0010] The present utility model is further configured as: the detection part is made of a magnet, the detection device is a Hall sensor, the detection part is eccentrically arranged on the output shaft, and the detection device detects the detection part once every time the output shaft rotates one week.

[0011] The present utility model is further configured as: a display screen for displaying the number of turns of the output shaft or the output flow rate of the pump body is connected to the controller, and a clear button for controlling the count to be cleared and a setting button for setting the workload of the pump body or the number of turns of the motor rotation are connected to the controller.

[0012] The present utility model is further configured as: a mounting seat is detachably arranged on the output shaft, the outer circumference of the mounting seat extends to the outside of the output shaft, and the detection part is arranged on the mounting seat.

[0013] The present utility model is further configured as: a placement groove is arranged on the motor, and the detection part is hidden in the placement groove.

[0014] The present utility model is further configured as: a support protrusion is arranged on the motor, the placement groove is arranged in the support protrusion, and the detection device is detachably arranged on the motor and abuts against the end of the support protrusion.

[0015] The present utility model is further configured as: further comprising a housing, the pump body and the motor are both arranged in the housing, and the motor is arranged in the middle of the housing. A battery pack is detachably arranged on the housing, and the battery pack and the pump body are respectively arranged on both sides of the motor.

[0016] The present utility model is further configured as: a slot is arranged at the end of the housing, and one end of the battery pack is inserted into the slot.

[0017] The advantages of the present utility model compared with the prior art are:

[0018] 1. In the present utility model, the number of turns of the output shaft during use is detected by the detection device and the detection part arranged on the output shaft, so as to determine the workload of the pump body, which is convenient for the user to quickly understand the amount of liquid transported by the liquid extraction pump. When the number of working turns of the motor is set in the controller, the liquid extraction pump can quickly transport a fixed amount of liquid, which is convenient for the user to use.

[0019] 2. The structure of the metering pump in the present utility model is simple and widely applied. The user can adjust the amount of liquid transported by the liquid extraction pump only by controlling the number of turns of the output shaft, without having to consider the change in the flow rate of the liquid extraction pump when the output shaft rotates one week due to the load, which is beneficial to improving the accuracy of the output flow rate of the liquid extraction pump; the setting of the stepper motor or the servo motor is convenient for accurately determining the number of turns or even the rotation angle of the output shaft, which is beneficial to accurately calculating the output flow rate of the liquid extraction pump.

[0020] 3. In the present utility model, the Hall sensor and the detection part do not need to be in direct contact, reducing the wear of the detection part and the detection device during use, which is beneficial to extending the service life of the detection device and the detection part; the setting of the display screen facilitates the user to understand the number of rotations of the output shaft or the flow rate output by the pump body in real time, and the clear button and the setting button facilitate the user to flexibly use the liquid extraction pump.

[0021] 4. In the present utility model, the setting of the mounting seat can increase the movement radius of the detection part, increase the linear velocity of the detection part, and thus improve the detection accuracy of the detection device; the setting of the placement groove can reduce the contact of other items with the detection part, avoid accidental damage to the detection part, and is beneficial to extending the service life of the liquid extraction pump; the setting of the support protrusion facilitates the fixed installation of the detection device, and the producer can flexibly adjust the height of the support protrusion according to needs, thereby controlling the distance between the detection device and the detection part, and facilitating the flexible production and assembly of the liquid extraction pump.

[0022] 5. In the present utility model, the battery packs and the pump body arranged on both sides of the motor can reduce or even avoid the contact between the liquid transported by the liquid extraction pump and the battery packs, avoiding damage to the battery packs caused by the liquid; the setting of the slots facilitates the stable installation of the battery packs, avoids bump damage to the battery packs, and can prevent the battery packs from accidentally detaching from the housing due to external forces. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the present utility model;

[0024] Figure 2 An exploded view of the present utility model;

[0025] Figure 3 is a schematic structural diagram of the present utility model with the right housing removed;

[0026] Figure 4 is a sectional view of the present utility model;

[0027] Figure 5 is a schematic structural diagram of the installation structure of the detection device and the detection part on the motor in the present utility model.

[0028] The meanings of the reference numerals in the figures: 1 - housing; 11 - left housing; 12 - right housing; 13 - handle; 14 - installation cavity; 15 - slot; 16 - control groove; 2 - motor; 21 - output shaft; 22 - support protrusion; 23 - placement groove; 24 - installation hole; 3 - pump body; 4 - detection part; 5 - detection device; 6 - controller; 7 - display screen;

[0029] 71 - clear button; 72 - setting button; 8 - battery pack. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0031] See Figures 1 to 5 As shown, a liquid extraction pump includes a pump body 3 and a motor 2 for driving the pump body 3. The pump body 3 is provided with a liquid inlet and a liquid outlet. A controller 6 is electrically connected to the motor 2. The motor 2 includes an output shaft 21. One end of the output shaft 21 is connected to the pump body 3, and a detection portion 4 is provided at the other end of the output shaft 21. A detection device 5 corresponding to the detection portion 4 is connected to the controller 6. When the motor 2 is turned on, the output shaft 21 drives the pump body 3 to move and drives the detection portion 4 to rotate. The detection device 5 detects the movement of the detection portion 4, and the controller 6 counts the number of rotations of the output shaft 21, thereby determining the workload of the pump body 3. In this structure, the detection device 5 and the detection portion 4 provided on the output shaft 21 detect the number of rotations of the output shaft 21 during use, thereby determining the workload of the pump body 3, which is convenient for the user to quickly understand the amount of liquid transported by the liquid extraction pump. When the number of working rotations of the motor 2 is set in the controller 6, the liquid extraction pump can quickly transport a fixed amount of liquid, which is convenient for the user to use.

[0032] The pump body 3 can be a variable pump. However, since the output flow rate of the variable pump can automatically adjust the flow rate according to the change of the external load, that is, the output flow rate is small when the pressure is high and the output flow rate is large when the pressure is low, it is necessary to keep the external load pressure constant during use to make the number of rotations of the output shaft 21 proportional to the amount of liquid transported by the liquid extraction pump. Therefore, it is preferred that the pump body 3 is a fixed-displacement pump. When the output shaft 21 rotates one week, the pump body 3 transports a certain amount of liquid. The structure of the fixed-displacement pump is simple and widely used. The user can adjust the amount of liquid transported by the liquid extraction pump only by controlling the number of rotations of the output shaft 21, without having to consider the change in the flow rate of the liquid extraction pump when the output shaft 21 rotates one week due to the load, which is beneficial to improving the accuracy of the output flow rate of the liquid extraction pump.

[0033] When the pump body 3 is a fixed-displacement pump, the user can realize the quantitative transportation of liquid only by controlling the number of rotations of the output shaft 21. In the present utility model, a display screen 7 for displaying the number of rotations of the output shaft 21 or the output flow rate of the pump body 3 is connected to the controller 6, and a clear button 7 for controlling the count to zero and a setting button 72 for setting the workload of the pump body 3 or the number of rotations of the motor 2 are connected to the controller 6. The setting of the display screen 7 is convenient for the user to understand the number of rotations of the output shaft 21 or the output flow rate of the pump body 3 in real time, while the clear button 7 and the setting button 72 are convenient for the user to use the liquid extraction pump flexibly.

[0034] In this embodiment, it is preferred that both the clear button 7 and the setting button 72 are provided on one side of the display screen 7, and it is preferred that at least two setting buttons 72 are connected to the controller 6. The two setting buttons 72 can increase or decrease the set workload of the pump body 3 or the number of rotations of the motor 2.

[0035] Preferably, the motor 2 is a stepper motor 2 or a servo motor 2. The controller 6 can control the motor 2 to rotate a set number of turns. The setting of the stepper motor 2 or the servo motor 2 facilitates accurately determining the number of turns and even the rotation angle of the output shaft 21, which is beneficial to accurately calculating the output flow rate of the liquid pumping pump.

[0036] The detection device 5 is a position sensor. In the present utility model, the detection device 5 is a proximity sensor to avoid wear of the detection device 5 and the detection part 4 after long-term use. In this embodiment, the detection part 4 is made of a magnet, and the detection device 5 is a Hall sensor. The detection part 4 is eccentrically arranged on the output shaft 21, and the detection device 5 detects the detection part 4 once every time the output shaft 21 rotates one week. The Hall sensor and the detection part 4 do not need to be in direct contact, reducing the wear of the detection part 4 and the detection device 5 during use, which is beneficial to extending the service life of the detection device 5 and the detection part 4.

[0037] In the present utility model, the detection part 4 can be directly fixed on the output shaft 21 by gluing or fasteners. There is a mounting seat, and this structure is simple and convenient for production and assembly. The detection part 4 can also be indirectly fixed on the output shaft 21. A mounting seat is detachably arranged on the output shaft 21, and the outer circumference of the mounting seat extends outward from the output shaft 21. The detection part 4 is arranged on the mounting seat. The setting of the mounting seat can increase the movement radius of the detection part 4 and the linear velocity of the detection part 4, thereby improving the accuracy of detection of the detection device 5. In the attached drawings of the specification of the present utility model, the detection part 4 is directly fixed on the output shaft 21, and the mounting seat is not shown in the attached drawings of the specification, but those skilled in the art can implement the technical solution with a mounting seat.

[0038] In the present utility model, the detection part 4 can be arranged on the end face at one end of the output shaft 21, or the detection part 4 can also be arranged on the outer circumference at one end of the output shaft 21. In this embodiment, the detection part 4 is fixedly arranged on the end face at one end of the output shaft 21.

[0039] An installation groove 23 is arranged on the motor 2, and the detection part 4 is hidden in the installation groove 23. The setting of the installation groove 23 can reduce the contact of other articles with the detection part 4, avoid accidental damage to the detection part 4, and is beneficial to extending the service life of the liquid pumping pump.

[0040] A support protrusion 22 is arranged on the motor 2, and the installation groove 23 is arranged in the support protrusion 22. The detection device 5 is detachably arranged on the motor 2 and abuts against the end of the support protrusion 22. The setting of the support protrusion 22 facilitates the fixed installation of the detection device 5. The producer can flexibly adjust the height of the support protrusion 22 according to needs, so as to control the distance between the detection device 5 and the detection part 4, which is convenient for the flexible production and assembly of the liquid pumping pump. In this embodiment, the support protrusion 22 is arranged at one end of the motor 2 away from the pump body 3, and a mounting hole 24 is arranged on the motor 2. The fastener cooperates with the mounting hole 24 to fix the detection device 5 on the motor 2.

[0041] The liquid pump also includes a shell 1, and the pump body 3 and the motor 2 are both arranged in the shell 1, and the motor 2 is arranged in the middle of the shell 1. A battery pack 8 is detachably arranged on the shell 1, and the battery pack 8 and the pump body 3 are respectively arranged on both sides of the motor 2. The battery pack 8 and the pump body 3 arranged on both sides of the motor 2 can reduce or even avoid the contact between the liquid transported by the liquid pump and the battery pack 8, thereby avoiding damage to the battery pack 8 caused by the liquid.

[0042] In the utility model, a slot 15 is provided at the end of the shell 1, and one end of the battery pack 8 is inserted into the slot 15. The setting of the slot 15 facilitates the stable installation of the battery pack 8, avoids the battery pack 8 from being damaged by bumps, and can avoid the battery pack 8 from accidentally separating from the shell 1 due to external forces. Control grooves 16 are provided on both sides of the slot 15, and the user can grasp the battery pack 8 through the control grooves 16 to install or remove the battery pack 8.

[0043] In this embodiment, the shell 1 includes a detachable left shell 11 and a right shell 12, and an installation cavity 14 is provided in the shell 1. The pump body 3 and the motor 2 are both provided in the installation cavity 14, and the slot 15 is provided on one side of the installation cavity 14 and is spaced apart from the installation cavity 14, and preferably a handle 13 is provided at the upper end of the shell 1.

[0044] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid pump, comprising a pump body (3) and a motor (2) for driving the pump body (3), wherein the pump body (3) is provided with a liquid inlet and a liquid outlet, and the motor (2) is electrically connected to a controller (6), characterized in that: The motor (2) comprises an output shaft (21), one end of the output shaft (21) is connected to the pump body (3), the other end of the output shaft (21) is provided with a detection part (4), and the controller (6) is connected with a detection device (5) corresponding to the detection part (4); when the motor (2) is controlled to be turned on, the output shaft (21) drives the pump body (3) to move and drives the detection part (4) to rotate, and the detection device (5) determines the workload of the pump body (3) by detecting the movement of the detection part (4) and counting the number of rotations of the output shaft (21) through the controller (6).

2. A liquid pump according to claim 1, characterized in that: The pump body (3) is a quantitative pump, and the output shaft (21) rotates one circle so that the pump body (3) delivers a certain amount of liquid.

3. A liquid pump according to claim 2, characterized in that: The motor (2) is a stepping motor (2) or a servo motor (2), and the controller (6) can control the motor (2) to rotate a set number of revolutions.

4. A liquid pump according to claim 1, characterized in that: The detection part (4) is made of a magnet, the detection device (5) is a Hall sensor, the detection part (4) is eccentrically arranged on the output shaft (21), and the detection device (5) detects the detection part (4) once every rotation of the output shaft (21).

5. A liquid pump according to claim 1, characterized in that: The controller (6) is connected to a display screen (7) for displaying the number of rotations of the output shaft (21) or the output flow of the pump body (3), and the controller (6) is connected to a reset button (71) for controlling the count reset and a setting button (72) for setting the workload of the pump body (3) or the number of rotations of the motor (2).

6. A liquid pump according to claim 1, characterized in that: The output shaft (21) is detachably provided with a mounting seat, the outer periphery of the mounting seat extends toward the outside of the output shaft (21), and the detection unit (4) is arranged on the mounting seat.

7. A liquid pump according to claim 1, characterized in that: The motor (2) is provided with a placement groove (23), and the detection part (4) is concealedly arranged in the placement groove (23).

8. A liquid pump according to claim 7, characterized in that: The motor (2) is provided with a supporting protrusion (22), a placement groove (23) is provided in the supporting protrusion (22), and the detection device (5) is detachably provided on the motor (2) and abuts against the end of the supporting protrusion (22).

9. The liquid pump according to claim 1, characterized in that: The invention also comprises a housing (1), wherein the pump body (3) and the motor (2) are both arranged in the housing (1), and the motor (2) is arranged in the middle of the housing (1); a battery pack (8) is detachably arranged on the housing (1), and the battery pack (8) and the pump body (3) are respectively arranged on both sides of the motor (2).

10. A liquid pump according to claim 9, characterized in that: A slot (15) is provided at the end of the housing (1), and one end of the battery pack (8) is inserted into the slot (15).

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