One-driving-one liquid injection pump

Abstract

The utility model relates to a one-driving-one liquid injection pump which comprises a box body and a one-way valve guide plate fixedly installed on one side of the box body through a fastener, and a confluence plate is installed on the one-way valve guide plate. The one-way valve guide plate is positioned between the box body and the convergence plate; a liquid outlet groove and a liquid inlet groove are formed in the confluence plate in parallel, three pairs of liquid inlet channels and liquid outlet channels are arranged on the one-way valve guide plate, each liquid inlet channel is connected with the liquid inlet groove in a penetrating mode, each liquid outlet channel is connected with the liquid outlet groove in a penetrating mode, and one-way valves are installed in each liquid inlet channel and each liquid outlet channel. The installation directions of the one-way valves in the liquid inlet channels and the installation directions of the one-way valves in the liquid outlet channels are opposite, and piston mechanisms corresponding to each pair of the liquid inlet channels and the liquid outlet channels and driving components driving the piston mechanisms to work are further arranged in the box body. The one-way valves are arranged on the liquid inlet channel and the liquid outlet channel, so that only liquid can be fed into the liquid inlet channel, only liquid can be discharged from the liquid outlet channel, pulsation is effectively reduced, and the liquid injection precision is effectively improved through cooperation of the piston mechanism, the integrated cam and the driven wheel.

Description

Technical Field

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

[0002] Constant flow pumps are currently widely used in biochemistry, medicine, chemical industry, environmental protection and other industries, and they play the role of continuously conveying small flow liquids at constant flow and pressure.

[0003] For example, the patent with the publication number CN218816821 U discloses a durable constant flow pump, including a driving mechanism, a piston mechanism, a water inlet mechanism and a water outlet mechanism, wherein the piston mechanism is driven by the driving mechanism to perform reciprocating piston motion, and when performing reciprocating piston motion, the water flow introduced into the interior of the piston mechanism by the water inlet mechanism is discharged from the water outlet mechanism, characterized in that the driving mechanism includes a motor and a main rotating shaft driven to rotate by the motor, a circular track that can rotate with the main rotating shaft is sleeved on the main rotating shaft, the path of the circular track is an inclined circular plane, and a rotating wheel whose outer circumference rotates along the path of the circular track is provided in the circular track, and the rotating wheel is connected to the piston mechanism in a transmission manner and can drive the piston mechanism to complete the reciprocating piston motion. In the above scheme, the water inlet mechanism and the water outlet mechanism realize the liquid delivery through the piston mechanism, and this structure is prone to the problem of large pulsation during high-speed operation; at the same time, the problem of parts in the pump being difficult to replace. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a one-to-one liquid injection pump.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a one-to-one injection pump, including a box body and a one-way valve guide plate fixedly installed on one side of the box body by means of fasteners, and a manifold is installed on the one-way valve guide plate; the one-way valve guide plate is located between the box body and the manifold; a liquid outlet groove and a liquid inlet groove are arranged in parallel in the manifold, and three pairs of liquid inlet channels and liquid outlet channels are arranged on the one-way valve guide plate, each liquid inlet channel is connected with the liquid inlet groove, and each liquid outlet channel is connected with the liquid outlet groove, and a one-way valve is installed in each liquid inlet channel and each liquid outlet channel; the one-way valve in the liquid inlet channel and the one-way valve in the liquid outlet channel are installed in opposite directions, and a piston mechanism corresponding to each pair of liquid inlet channels and liquid outlet channels and a driving component that drives the piston mechanism to work are also arranged in the box body.

[0006] Compared with the prior art, one-way valves are provided on both the liquid inlet channel and the liquid outlet channel, so the liquid inlet channel can only take in liquid and the liquid outlet channel can only discharge liquid, so that the liquid in the liquid inlet channel and the liquid outlet channel flow alternately, effectively reducing the generation of pulsation and thus improving the injection accuracy.

[0007] In a preferred technical solution of the present utility model, the one-way valve includes a hollow valve body, and an inlet end cover and an outlet end cover respectively arranged at both ends of the valve body. Through holes are provided on both the inlet end cover and the outlet end cover. A valve core is slidably arranged in the valve body. The valve core includes a sealing column adapted to the through hole. A blind hole is axially recessed in the valve core. A liquid outlet hole communicating with the blind hole is arranged on the side of the valve core. A spring is arranged in the blind hole. One end of the spring abuts against the bottom of the blind hole, and the other end abuts against the outlet end cover.

[0008] In a preferred technical solution of the present utility model, the piston mechanism includes a ceramic cylinder fixedly installed in the box body. A piston chamber is arranged in the ceramic cylinder. The liquid inlet channel and the liquid outlet channel are both communicated with the piston chamber. A piston rod is arranged in the piston chamber. The piston rod divides the piston chamber into an upper chamber and a lower chamber. The liquid inlet channel and the liquid outlet channel are both communicated with the lower chamber. One end of the piston rod extends out of the ceramic cylinder and is fixedly connected with the driving component.

[0009] In a preferred technical solution of the present utility model, the driving component includes a one-to-one connecting plate slidably arranged in the box body corresponding to each piston mechanism, and a camshaft driving the one-to-one connecting plate to reciprocate linearly in the box body.

[0010] In a preferred technical solution of the present utility model, an installation groove is arranged in the middle of the one-to-one connecting plate. The camshaft is located in the installation groove and abuts against the side wall of the installation groove. A fixing hole adapted to the piston rod is arranged on the one-to-one connecting plate. The piston rod is fixedly connected with the fixing hole.

[0011] In a preferred technical solution of the present utility model, two parallel guide rods are fixedly installed on the box body. The guide rods and the piston rod are located on both sides of the one-to-one connecting plate. The ends of the guide rods extend towards the one-to-one connecting plate. A linear bearing is arranged on the same side of the one-to-one connecting plate as the guide rods. The guide rods are inserted into the linear bearings.

[0012] In a preferred technical solution of the present utility model, steel sheets are fixedly installed on the opposite side walls of the installation groove. A driven wheel is sleeved on the camshaft. The driven wheel abuts against the steel sheet.

[0013] In a preferred technical solution of the present utility model, an eccentric wheel corresponding to the one-to-one connecting plate is arranged on the camshaft. The eccentric wheel is integrally processed with the camshaft. The driven wheel is embedded in the eccentric wheel. Adjacent two eccentric wheels are installed on the camshaft at an included angle and at equal intervals.

[0014] In a preferred technical solution of the present utility model, the external connection of the manifold plate is respectively communicated with a liquid outlet adapter and a liquid inlet adapter connected to the liquid outlet groove and the liquid inlet groove. The liquid outlet adapter and the liquid inlet adapter are located at both ends of the manifold plate.

[0015] In addition to the technical problems solved by the present invention, the technical features constituting the technical solution, and the advantages brought about by the technical features of these technical solutions described above, other technical problems that the present utility model can solve, other technical features included in the technical solution, and the advantages brought about by these technical features will be further described in detail with reference to the accompanying drawings. Description of the Drawings

[0016] Figure 1 is an exploded three-dimensional schematic diagram of the present utility model.

[0017] Figure 2 is a cross-sectional view of the current collector plate of the present utility model.

[0018] Figure 3 is a cross-sectional view of the one-way valve of the present utility model.

[0019] Figure 4 is a cross-sectional view of the piston mechanism of the present utility model.

[0020] Explanation of the reference numerals in the drawings: 01. Box body, 02. One-way valve guide plate, 03. Current collector plate, 04. Liquid outlet groove, 05. Liquid inlet groove, 06. Liquid outlet adapter, 07. Liquid inlet adapter, 08. Liquid inlet channel, 09. Liquid outlet channel, 10. One-way valve, 11. Valve body, 12. Inlet end cover, 13. Valve core, 14. Blind hole, 15. Sealing column, 16. Spring, 17. Liquid outlet hole, 18. Ceramic cylinder, 19. Piston rod, 20. Upper chamber, 21. Lower chamber, 22. One-to-one connecting plate, 23. Camshaft, 24. Installation groove, 25. Rear end cover of the pump core, 26. Guide rod, 27. Steel sheet, 28. Driven wheel, 29. Eccentric wheel, 30. Piston mechanism, 31. Through hole, 32. Fixed hole, 33. Inlet end cover. Detailed Description of the Preferred Embodiment

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model.

[0022] Please refer to Figures 1-4 As shown, the present utility model relates to a one-to-one liquid injection pump, including a box body 01 and a one-way valve guide plate 02 fixedly installed on one side of the box body 01 by means of fasteners. A current collector plate 03 is installed on the one-way valve guide plate 02. The one-way valve guide plate 02 is located between the box body 01 and the current collector plate 03.

[0023] Please refer to Figure 2 As shown, a liquid outlet groove 04 and a liquid inlet groove 05 are arranged in parallel in the current collector plate 03. A liquid outlet adapter 06 and a liquid inlet adapter 07 respectively communicating with the liquid outlet groove 04 and the liquid inlet groove 05 are arranged outside the current collector plate 03. The liquid outlet adapter 06 and the liquid inlet adapter 07 are located at both ends of the current collector plate 03.

[0024] Three pairs of liquid inlet channels 08 and liquid outlet channels 09 are provided on the one-way valve guide plate 02. Each liquid inlet channel 08 is in through connection with the liquid inlet tank 05 and located on the same plane. Each liquid outlet channel 09 is in through connection with the liquid outlet tank 04 and located on the same plane. One-way valves 10 are installed in each liquid inlet channel 08 and each liquid outlet channel 09. The one-way valves 10 in the liquid inlet channels 08 and the one-way valves 10 in the liquid outlet channels 09 are installed in opposite directions. It is used for one-way liquid inlet and one-way liquid outlet, ensuring the liquid injection accuracy. A piston mechanism 30 corresponding to each pair of liquid inlet channels 08 and liquid outlet channels 09 and a driving component for driving the piston mechanism 30 to work are provided in the box body 01. When the driving component drives the piston mechanism 30 to release, the one-way valve 10 in the liquid inlet channel 08 opens, and the one-way valve 10 in the liquid outlet channel 09 closes. The liquid enters the liquid inlet tank 05 from the liquid inlet adapter 07. Passes through the one-way valve 10 in the liquid inlet channel 08 and enters the piston mechanism 30. When the driving component drives the piston mechanism 30 to compress. The one-way valve 10 in the liquid inlet channel 08 closes, and the one-way valve 10 in the liquid outlet channel 09 opens. The liquid in the compression mechanism enters the liquid outlet tank 04 from the one-way valve 10 in the liquid outlet channel 09 and is discharged through the liquid outlet adapter 06. Since one-way valves 10 are provided in both the liquid inlet channels 08 and the liquid outlet channels 09, the liquid inlet channel 08 can only inlet liquid, and the liquid outlet channel 09 can only outlet liquid. And for the one-way valves 10 (for the liquid inlet channels 08 and the liquid outlet channels 09), the liquid alternately enters and exits, effectively reducing the generation of pulsation, thereby improving the liquid injection accuracy.

[0025] Please refer to Figure 3 As shown, the one-way valve 10 includes a hollow valve body 11 and an inlet end cover 33 and an outlet end cover 12 respectively provided at both ends of the valve body 11. Through holes 31 are provided on both the inlet end cover 33 and the outlet end cover 12. A valve core 13 is slidably provided in the valve body 11. The valve core 13 includes a sealing column 15 adapted to the through hole 31. A blind hole 14 is axially recessed in the valve core 13. A liquid outlet hole 17 communicating with the blind hole 14 is provided on the side of the valve core 13. A spring 16 is provided in the blind hole 14. One end of the spring 16 abuts against the bottom of the blind hole 14, and the other end abuts against the outlet end cover 12. In the normal state, the valve core 13 pushes the sealing column 15 to be inserted into the through hole 31 under the action of the spring 16 and seals the through hole 31. Thus, the liquid cannot flow from one end of the valve body 11 to the other end of the valve body 11. When a force is applied to the sealing column 15, the valve core 13 moves in the valve body 11 to compress the spring 16, separating the sealing column 15 from the through hole 31. The liquid enters the valve body 11 from the through hole 31 at one end of the valve body 11 and then enters the blind hole 14 through the liquid outlet hole 17 and flows to the through hole 31 at the other end of the valve body 11.

[0026] Please refer to Figure 4As shown in the figure, the piston mechanism 30 includes a ceramic cylinder 18 fixedly installed in the box body 01 in an interference fit manner. One end of the ceramic cylinder 18 is fixedly connected with a pump core rear end cover 25 through a fastener, and an O-ring seal is used for sealing connection between the pump core rear end cover 25 and the ceramic cylinder 18. A piston cavity is arranged in the ceramic cylinder 18. The pump core rear end cover is provided with an inlet and an outlet that are both connected to the liquid inlet channel 08 and the liquid outlet channel 09 in a through manner. The liquid inlet channel 08 and the liquid outlet channel 09 are both connected to the piston cavity through the inlet and the outlet in a through manner. A piston rod 19 is arranged in the piston cavity. The piston rod 19 divides the piston cavity into an upper chamber 20 and a lower chamber 21. The liquid inlet channel 08 and the liquid outlet channel 09 are both connected to the lower chamber 21 in a through manner. One end of the piston rod 19 extends out of the ceramic cylinder 18 and is fixedly connected with a driving component. The driving component drives the piston rod 19 to reciprocate in the piston cavity.

[0027] When the piston rod 19 moves away from the manifold plate 03, the volume in the lower chamber 21 increases, the pressure in the lower chamber 21 decreases, the check valve 10 in the liquid inlet channel 08 is opened under the action of the pressure, the check valve 10 in the liquid outlet channel 09 is closed under the action of the pressure, and the liquid enters the lower chamber from the liquid inlet groove 05 through the check valve 10. On the contrary, when the piston rod 19 moves towards the manifold plate 03, the volume in the lower chamber 21 decreases, the pressure in the lower chamber 21 increases, the check valve 10 in the liquid inlet channel 08 is closed under the action of the pressure, the check valve 10 in the liquid outlet channel 09 is opened under the action of the pressure, and the liquid in the lower chamber 21 enters the liquid tank 04 and is discharged through the liquid outlet adapter 06.

[0028] Please refer to Figure 1 As shown in the figure, the driving component includes a one-to-one connecting plate 22 slidably arranged in the box body 01 corresponding to each piston mechanism 30 and a camshaft 23 that drives the one-to-one connecting plate 22 to perform reciprocating linear movement in the box body 01. An installation groove 24 is arranged in the middle of the one-to-one connecting plate 22. The camshaft 23 is located in the installation groove 24 and abuts against the side wall of the installation groove 24. A fixing hole 32 adapted to the piston rod 19 is arranged on the one-to-one connecting plate 22; the piston rod 19 is fixedly connected with the fixing hole 32. When the camshaft 23 rotates under the action of an external driving source, it drives the one-to-one connecting plate 22 to reciprocate in the box body 01, thereby driving the piston mechanism 30 to work. The driving source of the present application is fixedly installed on the top of the box body 01. One end of the camshaft 23 extends out of the box body 01 and is fixedly connected with the output end of the driving source by a coupling. The driving source is preferably a servo motor, and other types of motors or any existing driving source can also be used to act on the camshaft 23 to rotate in the box body 01.

[0029] Two parallel guide rods 26 are fixedly installed on the box body 01. The guide rods 26 and the piston rod 19 are located on both sides of the one-to-one connection plate 22. The ends of the guide rods 26 extend towards the one-to-one connection plate 22. The guide rods 26 are preferably optical axes. A linear bearing is arranged on the same side of the one-to-one connection plate 22 as the guide rods 26, and the guide rods 26 are inserted into the linear bearing. The arrangement of the guide rods 26 provides support for the one-to-one connection plate 22 and, in cooperation with the linear bearing, enables the one-to-one connection plate 22 to reciprocate linearly in the box body 01 along the support shaft.

[0030] Steel sheets 27 are fixedly installed on the opposite side walls of the installation groove 24 through fasteners. A driven wheel 28 is sleeved on the camshaft 23, and the driven wheel 28 abuts against the steel sheets 27. The driven wheel 28 is preferably a ball bearing. The arrangement of the driven wheel 28 enables relative rolling contact between the steel sheets 27 and the driven wheel 28, reducing the frictional force and thus extending the service life of the steel sheets 27. Therefore, when the steel sheets 27 and the driven wheel 28 are worn or damaged artificially, they can be conveniently replaced.

[0031] An eccentric wheel 29 corresponding to the one-to-one connection plate 22 is arranged on the camshaft 23. The eccentric wheel 29 is integrally formed with the camshaft 23. The driven wheel 28 is embedded in the eccentric wheel 29, and two adjacent eccentric wheels 29 are installed on the camshaft 23 at an angle and at equal intervals. The above-mentioned driven wheel 28 is installed on the eccentric wheel 29. Since two adjacent eccentric wheels 29 are installed at an angle, when all the eccentric wheels 29 rotate synchronously, the corresponding one-to-one connection plates 22 are driven to reciprocate alternately in the box body 01.

[0032] An eccentric wheel 29 corresponding to the one-to-one connection plate 22 is arranged on the camshaft 23. The eccentric wheel 29 is integrally formed with the camshaft 23. Two adjacent eccentric wheels 29 are installed on the camshaft 23 at an angle and at equal intervals. Since two adjacent eccentric wheels 29 are installed at an angle, when all the eccentric wheels 29 rotate synchronously, the corresponding one-to-one connection plates 22 are driven to reciprocate alternately in the box body 01.

[0033] If there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, then the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the drawings). If the specific posture changes, then the directional indications will also change accordingly.

[0034] The above embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A one-to-one injection pump, characterized in that: It includes a box body and a one-way valve guide plate fixedly installed on one side of the box body by means of fasteners, and a manifold is installed on the one-way valve guide plate; the one-way valve guide plate is located between the box body and the manifold; a liquid outlet groove and a liquid inlet groove are arranged in parallel in the manifold, and three pairs of liquid inlet channels and liquid outlet channels are arranged on the one-way valve guide plate, each liquid inlet channel is connected with the liquid inlet groove, each liquid outlet channel is connected with the liquid outlet groove, and a one-way valve is installed in each liquid inlet channel and each liquid outlet channel; the one-way valve in the liquid inlet channel and the one-way valve in the liquid outlet channel are installed in opposite directions, and a piston mechanism corresponding to each pair of liquid inlet channels and liquid outlet channels and a driving component that drives the piston mechanism to work are also arranged in the box body.

2. The one-to-one injection pump according to claim 1, characterized in that: The one-way valve includes a hollow valve body and an inlet end cover and an outlet end cover respectively arranged at both ends of the valve body, the inlet end cover and the outlet end cover are both provided with through holes, a valve core is slidably arranged in the valve body, the valve core includes a sealing column adapted to the through hole, a blind hole recessed along the axial direction is arranged in the valve core, a liquid outlet hole connected to the blind hole is arranged on the side of the valve core, a spring is arranged in the blind hole, one end of the spring abuts against the bottom of the blind hole, and the other end abuts against the outlet end cover.

3. The one-to-one injection pump according to claim 1, characterized in that: The piston mechanism includes a ceramic cylinder fixedly installed in a casing, a piston cavity is arranged in the ceramic cylinder, and a liquid inlet channel and a liquid outlet channel are both connected through the piston cavity; a piston rod is arranged in the piston cavity, and the piston rod divides the piston cavity into an upper chamber and a lower chamber, and the liquid inlet channel and the liquid outlet channel are both connected through the lower chamber; one end of the piston rod extends out of the ceramic cylinder and is fixedly connected to the driving component.

4. The one-to-one injection pump according to claim 3, characterized in that: The driving component comprises a one-to-one connecting plate slidably arranged in the box body corresponding to each piston mechanism and a cam shaft driving the one-to-one connecting plate to move reciprocatingly in a straight line in the box body.

5. The one-to-one injection pump according to claim 4, characterized in that: A mounting groove is arranged in the middle of the one-to-one connecting plate, the camshaft is located in the mounting groove and abuts against the side wall of the mounting groove; a fixing hole adapted to the piston rod is arranged on the one-to-one connecting plate, and the piston rod is fixedly connected to the fixing hole.

6. The one-to-one injection pump according to claim 5, characterized in that: Two parallel guide rods are fixedly installed on the box body, and the guide rods and the piston rod are located on both sides of the one-to-one connecting plate; the ends of the guide rods extend toward the one-to-one connecting plate; linear bearings are arranged on the same side of the one-to-one connecting plate and the guide rods, and the guide rods are inserted into the linear bearings.

7. The one-to-one infusion pump according to claim 6, characterized in that: A steel sheet is fixedly mounted on the opposite side walls of the mounting groove; a driven wheel is sleeved on the camshaft, and the driven wheel abuts against the steel sheet.

8. The one-to-one infusion pump according to claim 7, characterized in that: The camshaft is provided with an eccentric wheel corresponding to the one-to-one connecting plate; the eccentric wheel and the camshaft are integrally processed and formed; the driven wheel is embedded in the eccentric wheel, and two adjacent eccentric wheels are installed on the camshaft at an angle and with equal spacing.

9. The one-to-one infusion pump according to claim 1, characterized in that: A liquid outlet adapter and a liquid inlet adapter which are respectively connected to the liquid outlet trough and the liquid inlet trough are arranged outside the manifold, and the liquid outlet adapter and the liquid inlet adapter are located at two ends of the manifold.

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