Miniature continuous fluid pump

Abstract

The utility model discloses a miniature continuous fluid pump which comprises a cylinder body, a liquid inlet and outlet valve plate is installed at the top of the cylinder body, a cylinder body top cover is installed at the top of the liquid inlet and outlet valve plate, a motor is installed at the bottom of the cylinder body, a motor shaft at the top of the motor is connected with a driving gear, and the driving gear is connected with a motor shaft. The cylinder body is internally provided with two or more driven gears meshed with the driving gear, each driven gear is provided with an eccentric wheel, the cylinder body is internally provided with two or more pistons capable of moving up and down, the bottoms of the pistons are provided with long-strip-shaped through grooves for the eccentric wheels to slide, and the long-strip-shaped through grooves are communicated with the cylinder body. A piston cylinder allowing the pistons to be arranged in a sleeved mode is arranged in the cylinder body, the arrangement heights of the pistons are different, a liquid inlet and outlet valve sealing gasket is installed on the top of the cylinder body, and a liquid inlet channel is formed in a top cover of the cylinder body. Liquid is fed and discharged stably, the liquid outlet one-way valve ensures sufficient exhaust, fluid does not flow back, liquid is discharged smoothly, operation noise is low, and consumer experience is good.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid spray pumps, in particular to a micro continuous fluid pump. Background Art

[0002] At present, the micro continuous fluid pump is mainly represented by the diaphragm pump, which uses a thin film to separate the pumped liquid from the piston and the pump cylinder, thereby protecting the piston and the pump cylinder. However, the diaphragm pump is greatly affected by temperature and is mainly suitable for pumping gas or pumping mixed gas and liquid. When pumping liquids with relatively high viscosity, the liquid flow rate will be unstable, and there are defects such as unsmooth liquid discharge, easy pump blockage, short life, loud noise, and easy backflow, which affect normal use and poor consumer experience. At the same time, the spray pump on the market also uses a piston pump, but the existing piston pump inlet and outlet are controlled by the same piston, or a balance wheel is used to control different pistons to achieve liquid inlet and liquid outlet. The same balance wheel controls the liquid inlet and liquid outlet, which will be unstable and the liquid outlet control is not accurate, affecting normal use. Therefore, in order to avoid the shortcomings of the prior art, it is necessary to improve the prior art. Utility Model Content

[0003] The utility model aims to overcome the shortcomings and deficiencies in the prior art and provide a micro continuous fluid pump with stable liquid discharge and high liquid discharge accuracy.

[0004] The utility model is realized by the following technical solutions:

[0005] A micro continuous fluid pump comprises a cylinder body, a liquid inlet and outlet valve plate is installed on the top of the cylinder body, a cylinder body top cover is installed on the top of the liquid inlet and outlet valve plate, a motor is installed at the bottom of the cylinder body, a driving gear is connected to the motor shaft at the top of the motor, two or more driven gears meshing with the driving gear are installed in the cylinder body, the driven gear is provided with an eccentric wheel, two or more pistons moving up and down are installed in the cylinder body, a long strip through groove is provided at the bottom of the piston for the eccentric wheel to slide, a piston cylinder is provided in the cylinder body for the piston to be sleeved, the setting heights of the pistons are different, an inlet and outlet valve sealing gasket is installed on the top of the cylinder body, the cylinder body top cover is provided with a liquid inlet channel, the inlet and outlet valve plate is provided with a liquid inlet hole connected with the liquid inlet channel, the liquid inlet hole is arranged A liquid inlet check valve is installed, a plurality of liquid inlet grooves are arranged on the side of the liquid inlet check valve, a sealing ring is arranged at the bottom of the liquid inlet check valve, the inlet and outlet valve sealing gasket is provided with a liquid inlet conduction hole connected with the liquid inlet hole, the bottom of the inlet and outlet valve sealing gasket is provided with a liquid inlet flow channel connected with the liquid inlet conduction hole, the inlet and outlet valve sealing gasket is provided with a liquid outlet conduction hole connected with the liquid inlet flow channel, the inlet and outlet valve plate is provided with a liquid outlet hole connected with the liquid outlet conduction hole, a liquid outlet check valve is installed on the top of the liquid outlet hole, the cylinder body top cover is provided with a spring that presses against the top of the liquid outlet check valve, the bottom of the cylinder body top cover is provided with a liquid outlet flow channel connected with the liquid outlet hole, the bottom of the inlet and outlet valve plate is provided with a liquid outlet channel connected with the liquid outlet flow channel, and the top of the piston is provided with a push rod corresponding to the liquid outlet check valve.

[0006] Furthermore, an arc-shaped anti-slip flange is provided on the outer side of the middle part of the liquid inlet one-way valve.

[0007] Furthermore, the cylinder top cover is provided with a spring positioning installation hole for installing the spring, and the cylinder top cover is provided with a liquid outlet one-way valve installation hole for installing the liquid outlet one-way valve.

[0008] Furthermore, a groove is provided on the top of the cylinder body for the bottom of the liquid inlet one-way valve to abut against.

[0009] Furthermore, a guide groove for guiding the upper part of the liquid inlet one-way valve is provided at the bottom of the cylinder top cover.

[0010] Furthermore, a cylinder piston sealing ring is sleeved on the outer side of the piston.

[0011] Furthermore, the top of the liquid outlet hole is provided with an abutting inclined surface corresponding to the bottom of the liquid outlet one-way valve.

[0012] Furthermore, a sealing gasket positioning and installation groove for installing the sealing gasket of the inlet and outlet valve is provided on the top of the cylinder body.

[0013] Furthermore, a longitudinal limiting block is provided on the outer side of the bottom of the piston, and a longitudinal limiting groove corresponding to the limiting block is provided on the inner side of the cylinder body.

[0014] Furthermore, a cylinder bottom cover for mounting the motor is provided at the bottom of the cylinder body, and the cylinder top cover, the cylinder body and the cylinder bottom cover are fixedly connected by screws and nuts.

[0015] Compared with the prior art, the utility model is connected with a driving gear through the motor shaft at the top of the motor, two or more driven gears meshing with the driving gear are installed in the cylinder body, the driven gear is provided with an eccentric wheel, two or more pistons moving up and down are installed in the cylinder body, the bottom of the piston is provided with a long strip through groove for the eccentric wheel to slide, a piston cylinder for the piston to be sleeved is provided in the cylinder body, the setting heights of the pistons are different, the inlet and outlet valve plate is provided with a liquid inlet hole connected with the liquid inlet channel, and the liquid inlet hole is provided with a liquid inlet one-way valve. The valve is provided with a plurality of liquid inlet grooves on the side of the liquid inlet check valve, a sealing ring is provided at the bottom of the liquid inlet check valve, a liquid inlet and outlet valve sealing gasket is provided with a liquid inlet conduction hole connected with the liquid inlet hole, a liquid inlet flow channel connected with the liquid inlet conduction hole is provided at the bottom of the liquid inlet and outlet valve sealing gasket, a liquid inlet and outlet valve sealing gasket is provided with a liquid outlet conduction hole connected with the liquid inlet flow channel, a liquid inlet and outlet valve plate is provided with a liquid outlet hole connected with the liquid outlet conduction hole, a liquid outlet check valve is installed on the top of the liquid outlet hole, a spring is installed on the top cover of the cylinder body to resist the top of the liquid outlet check valve, and the cylinder body top cover is provided with a spring to resist the top of the liquid outlet check valve. The bottom of the pump is provided with a liquid outlet channel connected to the liquid outlet hole, the bottom of the inlet and outlet valve plate is provided with a liquid outlet channel connected to the liquid outlet channel, and the top of the piston is provided with a push rod corresponding to the liquid outlet check valve. The rotation of the active gear drives the eccentric wheel arranged on the driven gear to rotate, driving different pistons to move up and down. Pistons at different heights can simultaneously realize liquid inlet and liquid outlet, and the liquid inlet and liquid outlet are carried out synchronously, so that the liquid inlet and liquid outlet of the fluid pump are not controlled by the same piston, ensuring continuous and uniform pumping of the fluid, no intermittent phenomenon of liquid inlet and liquid outlet, and stable liquid inlet and liquid outlet. The pump is stable, the liquid inlet and outlet are continuous, the liquid outlet control is precise, and it is less affected by temperature. When the pump is used for liquids with high viscosity, there will be no unstable liquid outlet flow. The push rod will push open the liquid outlet one-way valve, and the liquid outlet one-way valve ensures sufficient exhaust, no backflow of the fluid, smooth liquid outlet, and will not block the pump. The pump has a long service life and low operating noise, which ensures the normal use of the fluid pump and a good consumer experience. At the same time, the fluid pump can also be used to pump air, or the liquid inlet channel, air inlet channel, liquid outlet channel, and air outlet channel can be separately set for pumping liquid and air at the same time, which is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the structure of the micro continuous fluid pump of the utility model;

[0018] Figure 2 This is a structural exploded view of the micro continuous fluid pump of the utility model;

[0019] Figure 3 It is a schematic diagram of the longitudinal cross-section structure of the micro continuous fluid pump of the utility model;

[0020] Figure 4 This is a structural schematic diagram of the inlet and outlet liquid valve plate of the utility model;

[0021] Figure 5 It is a structural schematic diagram of the cylinder top cover of the utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the sealing gasket of the inlet and outlet valve of the utility model;

[0023] Figure 7 It is a structural schematic diagram of the liquid inlet one-way valve of the utility model.

[0024] In the figure: 1-cylinder body; 2-liquid inlet and outlet valve plate; 3-cylinder body top cover; 4-motor; 5-driving gear; 6-driven gear; 7-eccentric wheel; 8-piston; 9-long strip through groove; 10-piston cylinder; 11-liquid inlet and outlet valve sealing gasket; 12-liquid inlet channel; 13-liquid inlet hole; 14-liquid inlet check valve; 15-liquid inlet groove; 16-against the sealing ring; 17-liquid inlet conduction hole; 18-liquid inlet flow channel; 19-liquid outlet conduction hole; 20-liquid outlet hole; 21-liquid outlet one-way valve; 22-spring; 23-liquid outlet flow channel; 24-liquid outlet channel; 25-top rod; 26-arc-shaped anti-drop flange; 27-spring positioning and mounting hole; 28-liquid outlet one-way valve mounting hole; 29-groove; 30-guide groove; 31-cylinder piston sealing ring; 32-resting inclined surface; 33-sealing pad positioning and mounting groove; 34-limiting block; 35-cylinder bottom cover; 36-screw; 37-nut. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figures 1 to 7The utility model is shown as a micro continuous fluid pump, including a cylinder body 1, a liquid inlet and outlet valve plate 2 is installed on the top of the cylinder body 1, a cylinder body top cover 3 is installed on the top of the liquid inlet and outlet valve plate 2, a motor 4 is installed at the bottom of the cylinder body 1, and a driving gear 5 is connected to the motor shaft on the top of the motor 4. Two or more driven gears 6 meshing with the driving gear 5 are installed in the cylinder body 1, and the driven gear 6 is provided with an eccentric wheel 7. Two or more pistons 8 that move up and down are installed in the cylinder body 1, and a long strip through groove 9 for the eccentric wheel 7 to slide is provided at the bottom of the piston 8. A piston cylinder 10 for the piston 8 to be sleeved is provided in the cylinder body 1, and the setting heights of the piston 8 are different. An inlet and outlet valve sealing gasket 11 is installed on the top of the cylinder body 1, and a liquid inlet channel 12 is provided on the cylinder body top cover 3. The inlet and outlet valve plate 2 is provided with a liquid inlet hole 13 connected with the liquid inlet channel 12, and the liquid inlet hole 13 is provided with a liquid inlet The one-way valve 14 has a plurality of liquid inlet grooves 15 on the side of the liquid inlet one-way valve 14, a sealing ring 16 is provided at the bottom of the liquid inlet one-way valve 14, a liquid inlet conduction hole 17 connected to the liquid inlet hole 13 is provided at the bottom of the liquid inlet and outlet valve sealing gasket 11, a liquid inlet channel 18 connected to the liquid inlet conduction hole 17 is provided, and a liquid outlet conduction hole 19 connected to the liquid inlet channel 12 is provided at the bottom of the liquid inlet and outlet valve sealing gasket 11. The plate 2 is provided with a liquid outlet hole 20 connected with the liquid outlet conducting hole 19, a liquid outlet one-way valve 21 is installed on the top of the liquid outlet hole 20, the cylinder top cover 3 is installed with a spring 22 against the top of the liquid outlet one-way valve 21, the bottom of the cylinder top cover 3 is provided with a liquid outlet channel 23 connected with the liquid outlet hole 20, the bottom of the inlet and outlet valve plate 2 is provided with a liquid outlet channel 24 connected with the liquid outlet channel 23, and the top of the piston 8 is provided with a push rod 25 corresponding to the liquid outlet one-way valve 21.A driving gear 5 is connected through the motor shaft at the top of the motor 4. Two or more driven gears 6 meshing with the driving gear 5 are installed in the cylinder body 1. The driven gear 6 is provided with an eccentric wheel 7. Two or more pistons 8 moving up and down are installed in the cylinder body 1. The bottom of the piston 9 is provided with a long strip through groove 9 for the eccentric wheel 7 to slide. A piston cylinder 10 for the piston 8 to be set is provided in the cylinder body 1. The setting height of the piston 8 is different. The inlet and outlet valve plate 2 is provided with a liquid inlet hole 13 connected with the liquid inlet channel 12. The liquid inlet hole 13 is provided with a liquid inlet check valve 14. The liquid inlet check valve The side of the liquid inlet check valve 14 is provided with a plurality of liquid inlet grooves 15, the bottom of the liquid inlet check valve 14 is provided with a sealing ring 16, the liquid inlet and outlet valve sealing gasket 11 is provided with a liquid inlet conduction hole 17 connected to the liquid inlet hole 13, the bottom of the liquid inlet and outlet valve sealing gasket 11 is provided with a liquid inlet flow channel 18 connected to the liquid inlet conduction hole 17, the liquid inlet and outlet valve sealing gasket 11 is provided with a liquid outlet conduction hole 19 connected to the liquid inlet flow channel 18, the liquid inlet and outlet valve plate 2 is provided with a liquid outlet hole 20 connected to the liquid outlet conduction hole 19, and a liquid outlet check valve 21 is installed on the top of the liquid outlet hole 20, and the cylinder body top cover 3 is provided with a liquid outlet check valve 21 against the liquid outlet check valve 2 1, a spring 22 at the top of the cylinder body cover 3 is provided at the bottom of the cylinder body cover 3 with a liquid outlet channel 23 connected to the liquid outlet hole 20, a liquid outlet channel 24 connected to the liquid outlet channel 23 is provided at the bottom of the liquid inlet and outlet valve plate 2, and a push rod 25 corresponding to the liquid outlet check valve 21 is provided at the top of the piston 8. The driving gear 5 rotates to drive the eccentric wheel 7 set on the driven gear 6 to rotate, driving different pistons 8 to move up and down, and pistons 8 at different heights can simultaneously realize liquid inlet and liquid outlet, and the liquid inlet and liquid outlet are synchronously carried out, so that the liquid inlet and liquid outlet of the fluid pump are not controlled by the same piston, ensuring continuous and uniform pumping of fluid, and the liquid inlet and liquid outlet are synchronously controlled. There is no intermittent phenomenon of the liquid, the liquid inlet and liquid outlet are stable, the liquid inlet and liquid outlet are coherent, the liquid outlet control is precise, and it is less affected by temperature. When the pump is a liquid with high viscosity, there will be no unstable liquid outlet flow. The push rod 25 pushes open the liquid outlet one-way valve 21, and the liquid outlet one-way valve 21 ensures sufficient exhaust, the fluid does not flow back, the liquid outlet is smooth, and the pump will not be blocked. The service life is long and the operating noise is low, which ensures the normal use of the fluid pump and the consumer experience is good. At the same time, the fluid pump can also be used to pump air, or the liquid inlet channel, air inlet channel, liquid outlet channel, and air outlet channel are separately set to pump liquid and pump air at the same time, which is more convenient to use.

[0027] An arc-shaped anti-drop flange 26 is provided on the outer side of the middle of the liquid inlet check valve 14 to ensure that when liquid is inlet, the liquid inlet check valve 14 is stably located in the liquid inlet hole 13, the fluid can fully enter from the liquid inlet groove 15, and at the same time ensure that the fluid does not flow back.

[0028] The cylinder top cover 3 is provided with a spring positioning mounting hole 27 for installing the spring 22, and the cylinder top cover 3 is provided with a liquid outlet check valve mounting hole 28 for installing the liquid outlet check valve 21, so that the installation and reset of the spring 22 are stable, the installation of the liquid outlet check valve 21 is stable, the up and down movement is stable, and the liquid outlet control is stable.

[0029] The top of the cylinder body 1 is provided with a groove 29 for the bottom of the liquid inlet check valve 14 to abut against, which is beneficial to the stable positioning of the liquid inlet check valve 14 during liquid inlet and improves the stability of liquid inlet.

[0030] A guide groove 30 for guiding the upper part of the liquid inlet check valve 14 is provided at the bottom of the cylinder top cover 3, so that the up and down movement of the liquid inlet check valve 14 is stable and the liquid inlet control is stable.

[0031] The outer side of the piston 8 is sleeved with a cylinder piston sealing ring 31 to improve the sealing performance of the piston 8 and make the accuracy of liquid in and out higher.

[0032] The top of the liquid outlet hole 20 is provided with an abutting inclined surface 32 corresponding to the bottom of the liquid outlet check valve 14, so that the liquid outlet check valve 14 can contact the liquid outlet hole 20 more fully when liquid is flowing in, thereby ensuring the stability and efficiency of liquid flow.

[0033] A sealing gasket positioning and installation groove 33 for installing the inlet and outlet valve sealing gasket 11 is provided on the top of the cylinder body 1, which facilitates the positioning and installation of the inlet and outlet valve sealing gasket 11 and makes the inlet and outlet valve sealing gasket 11 more firmly installed.

[0034] A longitudinal limit block 34 is provided on the outer side of the bottom of the piston 8, and a longitudinal limit groove corresponding to the limit block 34 is provided on the inner side of the cylinder body 1. The limit block 34 and the limit groove guide the up and down movement, so that the up and down movement of the piston 8 is smoother and more stable.

[0035] A cylinder bottom cover 35 for installing the motor 4 is provided at the bottom of the cylinder body 1, which facilitates the quick installation and subsequent maintenance of the motor 4. The cylinder top cover 3, the cylinder body 1 and the cylinder bottom cover 35 are fixedly connected by screws 36 and nuts 37, making the installation of the fluid pump simpler and more stable, which is conducive to subsequent maintenance.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A micro continuous fluid pump, characterized in that: The invention comprises a cylinder body, a liquid inlet and outlet valve plate is installed on the top of the cylinder body, a cylinder body top cover is installed on the top of the liquid inlet and outlet valve plate, a motor is installed on the bottom of the cylinder body, a driving gear is connected to the motor shaft on the top of the motor, two or more driven gears meshing with the driving gear are installed in the cylinder body, the driven gear is provided with an eccentric wheel, two or more pistons moving up and down are installed in the cylinder body, a long strip through groove is provided at the bottom of the piston for the eccentric wheel to slide, a piston cylinder is provided in the cylinder body for the piston to be sleeved, and the setting heights of the pistons are different, an inlet and outlet valve sealing gasket is installed on the top of the cylinder body, a liquid inlet channel is provided on the cylinder body top cover, the inlet and outlet valve plate is provided with a liquid inlet hole connected with the liquid inlet channel, and a liquid inlet hole is installed A one-way valve, wherein a plurality of liquid inlet grooves are provided on the side of the liquid inlet one-way valve, a sealing ring is provided at the bottom of the liquid inlet one-way valve, an inlet conduction hole connected to the liquid inlet hole is provided on the sealing gasket of the liquid inlet and outlet valve, an inlet flow channel connected to the liquid inlet conduction hole is provided on the bottom of the sealing gasket of the liquid inlet and outlet valve, an outlet flow channel connected to the liquid inlet conduction hole is provided on the sealing gasket of the liquid inlet and outlet valve, an outlet flow channel connected to the liquid inlet flow channel is provided on the sealing gasket of the liquid inlet and outlet valve, an outlet hole connected to the outlet conduction hole is provided on the top of the outlet hole, a spring is provided on the top cover of the cylinder body to resist the top of the liquid outlet one-way valve, an outlet flow channel connected to the liquid outlet hole is provided on the bottom of the cylinder body top cover, an outlet channel connected to the liquid outlet flow channel is provided on the bottom of the liquid inlet and outlet valve plate, and a push rod corresponding to the liquid outlet one-way valve is provided on the top of the piston.

2. The micro continuous fluid pump according to claim 1, characterized in that: An arc-shaped anti-slip flange is arranged on the outer side of the middle part of the liquid inlet one-way valve.

3. The micro continuous fluid pump according to claim 1, characterized in that: The cylinder top cover is provided with a spring positioning installation hole for installing the spring, and the cylinder top cover is provided with a liquid outlet one-way valve installation hole for installing the liquid outlet one-way valve.

4. The micro continuous fluid pump according to claim 1, characterized in that: The top of the cylinder body is provided with a groove for the bottom of the liquid inlet one-way valve to abut against.

5. The micro continuous fluid pump according to claim 1, characterized in that: A guide groove for guiding the upper part of the liquid inlet one-way valve is provided at the bottom of the cylinder top cover.

6. The micro continuous fluid pump according to claim 1, characterized in that: The outer side of the piston is sleeved with a cylinder piston sealing ring.

7. The micro continuous fluid pump according to claim 1, characterized in that: The top of the liquid outlet hole is provided with a supporting inclined surface corresponding to the bottom of the liquid outlet one-way valve.

8. The micro continuous fluid pump according to claim 1, characterized in that: A sealing gasket positioning and installation groove for installing the sealing gasket of the inlet and outlet valve is provided on the top of the cylinder body.

9. The micro continuous fluid pump according to claim 1, characterized in that: A longitudinal limiting block is arranged on the outer side of the bottom of the piston, and a longitudinal limiting groove corresponding to the limiting block is arranged on the inner side of the cylinder body.

10. The micro continuous fluid pump according to claim 1, characterized in that: A cylinder bottom cover for mounting the motor is provided at the bottom of the cylinder body, and the cylinder top cover, the cylinder body and the cylinder bottom cover are fixedly connected by screws and nuts.

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