Efficient integrated numerical control constant-flow liquid injection pump

Abstract

The utility model discloses an efficient integrated numerical control constant-flow liquid injection pump which comprises a pump cover, a liquid outlet channel and a liquid inlet channel which are independent of each other are arranged in the pump cover, two first mounting holes and two second mounting holes are formed in the bottom face of the pump cover, a liquid outlet one-way valve is fixedly mounted in each first mounting hole, and a liquid outlet one-way valve is fixedly mounted in each second mounting hole. A liquid inlet one-way valve is fixedly mounted in each second mounting hole; the two corrugated pipes are arranged in a barrel shape, the two corrugated pipes are arranged in a spaced mode and fixed to the bottom face of the pump cover in a sealed mode, and each corrugated pipe is correspondingly communicated with one liquid outlet one-way valve and one liquid inlet one-way valve; the driving mechanism is used for driving the two corrugated pipes to stretch and retract in the opposite directions in the vertical direction, so that when one corrugated pipe conducts compression motion, the other corrugated pipe conducts stretching motion, and compared with the prior art, uninterrupted liquid inlet and liquid outlet are achieved, so that the working efficiency of the liquid injection pump is improved, and the problem that in the prior art, the working efficiency is low is solved.

Description

Technical Field

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

[0002] Bellows injection pumps, also known as bellows pumps, are primarily used for the transportation of fluids or liquids. Bellows injection pumps utilize a flexible tube (bellows) to expand and contract, causing the volume inside the bellows to change, generating pressure to propel the liquid. Their versatility and reliable stability make them widely used in various fields, including medical, environmental, and industrial applications.

[0003] Referring to patent document CN2022227105628, which discloses an externally connected electric bellows infusion pump, comprising: a pump head, on which an inlet flow channel and an outlet flow channel are provided; an inlet one-way valve assembly mounted on the pump head and connected to the inlet end of the inlet flow channel of the pump head; an outlet one-way valve assembly mounted on the pump head and connected to the outlet end of the outlet flow channel of the pump head; a bellows fixedly disposed in the pump head, wherein the space between the outer surface of the bellows and the inner surface of the pump head constitutes a pump chamber of the pump head, and the pump chamber is respectively connected to the inlet flow channel and the outlet flow channel; and a bellows drive unit which is an electric drive unit. The bellows of the infusion pump is essentially a piston, which telescopes in the pump chamber through the bellows to change the volume in the pump chamber to achieve liquid delivery. The bellows is not directly used as a carrier of the liquid. When faced with the need to deliver corrosive liquids, the pump head is easily corroded, resulting in a short service life.

[0004] In addition, in the patent document with application number CN2022227105628, the infusion pump can only discharge or infuse liquid, and cannot infuse and discharge liquid at the same time. Two sets of infusion pumps are required to achieve simultaneous infuse and discharge. This method has a relatively complex structure, an increase in parts, and a large overall volume of the injection system composed of the injection pumps. The failure rate increases, the working stability is greatly reduced, and the maintenance cost is increased. There is a problem of complex structure. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a high-efficiency integrated digitally controlled constant-flow liquid injection pump, which can solve the problem that the previous structure was complex and a single liquid injection pump could not simultaneously inlet and outlet liquid.

[0006] In order to solve the above technical problems, the utility model discloses a high-efficiency integrated CNC constant-flow liquid injection pump, including a pump cover, which is provided with an independent liquid outlet channel and a liquid inlet channel inside. The bottom surface of the pump cover is provided with two first mounting holes that are arranged at intervals and connected to the liquid outlet channel and two second mounting holes that are arranged at intervals and connected to the liquid inlet channel. A liquid outlet one-way valve is fixedly installed in each first mounting hole, and a liquid inlet one-way valve is fixedly installed in each second mounting hole; two bellows, each bellows is arranged in a cylindrical shape so that the bottom end of the bellows forms a closed structure, and the top end forms an opening connected to the internal cavity. The two bellows are arranged at intervals and sealed and fixed on the bottom surface of the pump cover, and each bellows corresponds to a liquid outlet one-way valve and a liquid inlet one-way valve; a driving mechanism is used to drive the two bellows to extend and retract in opposite directions in the vertical direction, so that when one of the bellows performs a compression movement, the other bellows performs an extension movement.

[0007] Among them, the top end of each bellows extends outward to form a mounting portion, and the mounting portion is fixed to the bottom surface of the pump cover by screws.

[0008] Wherein, a sealing gasket is provided between the top surface of the mounting portion and the bottom surface of the pump cover.

[0009] The pump also includes a frame, which is fixedly installed below the pump cover, and a driving mechanism is installed in the frame.

[0010] Among them, the driving mechanism includes a driving motor, a driving pulley, a driven pulley, a synchronous belt, a transmission shaft, a left eccentric wheel and a right eccentric wheel; the driving motor is fixedly mounted on the inner bottom surface of the frame, the driving pulley is fixedly mounted on the output shaft of the driving motor, the transmission shaft is horizontally arranged and rotatably mounted under the two bellows, the left eccentric wheel is fixedly mounted on the left side of the transmission shaft and is located under one of the bellows, the right eccentric wheel is fixedly mounted on the right side of the transmission shaft and is located under the other bellows, the driven pulley is fixedly sleeved on the outer peripheral side of the transmission shaft, and the synchronous belt is sleeved on the outer peripheral side of the driving pulley and the driven pulley; the left eccentric wheel and the right eccentric wheel are both connected to the bottom of the corresponding bellows through a guide assembly.

[0011] The left eccentric wheel extends outwardly a first connection portion connected to the guide assembly, and the right eccentric wheel extends outwardly a second connection portion connected to the guide assembly; the first connection portion and the second connection portion are staggered in the height direction.

[0012] Among them, the guide assembly includes a partition fixedly installed laterally inside the frame, the partition is provided with a guide hole, a guide member is provided in the guide hole, the guide member can slide back and forth in the height direction along the guide hole, the top end of the guide member is fixedly connected to the bottom end of the bellows, and the bottom end of the guide member is provided with a crank connected to the first connecting part or the second connecting part.

[0013] Among them, a columnar body extends downward from the bottom end of the corrugated tube, a sleeve is formed at the top end of the guide member, the columnar body is provided with a first through hole arranged horizontally, and the sleeve is provided with a second through hole arranged horizontally; in the assembled state, the columnar body is inserted into the sleeve, and the first through hole and the second through hole are aligned in the horizontal direction.

[0014] The bottom end of the guide member extends downward to form a pair of spaced mounting ears, the top end of the crank is inserted between the pair of mounting ears, and the top end of the crank is hinged to the mounting ears through a hinge; a bearing is provided at the bottom end of the crank, the outer ring of the bearing is fixed to the crank, and the inner ring of the bearing is fixed to the first connecting part or the second connecting part.

[0015] A groove is provided on the top surface of the partition, and a conduit is provided below the partition. The top end of the conduit passes through the partition and communicates with the groove, and the bottom end of the conduit passes through the bottom surface of the frame.

[0016] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0017] (1) A driving mechanism is provided to drive the two bellows to expand and contract in opposite directions in the vertical direction, so that the volume in the bellows changes. The volume increases in the process of liquid absorption, and the volume decreases in the process of liquid discharge. Since the two bellows are arranged in opposite directions of expansion and contraction, when the volume of one bellows decreases, the volume of the other bellows increases. This ensures that when one bellows is discharging liquid, the other bellows is taking in liquid. Thus, uninterrupted liquid inflow and outflow are achieved, constant flow is guaranteed, and the working efficiency of the injection pump is improved, solving the problem of low working efficiency in the past.

[0018] (2) The bellows is used as the main carrier of the fluid. The overall structure is simple and compact, with high working stability, which is convenient for the maintenance and upkeep of the injection pump. The bellows can be made of high-strength strong acid and alkali resistant materials, thereby improving the corrosion resistance and stability of the injection pump, solving the previous problems of short service life and inability to be suitable for corrosive liquid transportation.

[0019] (3) In other embodiments, a guide assembly is used to guide the movement of the bellows, which greatly ensures the accuracy of liquid injection and solves the problem of unstable liquid injection accuracy caused by large shaking during the expansion and contraction movement of the bellows, further improving the working stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 any creative work.

[0021] Figure 1 2. It is a structural diagram of the liquid injection pump mechanism in the embodiment;

[0022] Figure 2 1 is a front view of the injection pump in the embodiment;

[0023] Figure 3 yes Figure 2 Cross-sectional view at AA in the middle;

[0024] Figure 4 yes Figure 2 Cross-sectional view at the middle BB;

[0025] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0026] Figure 6 This is a schematic diagram of the structure of the liquid injection pump hidden behind the back plate in the embodiment;

[0027] Figure 7 2 is a schematic structural diagram of a driving mechanism in an embodiment;

[0028] Figure 8 2 is an exploded view of the driving mechanism in the embodiment. DETAILED DESCRIPTION

[0029] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0030] The terms "first," "second," and so on, in the specification and claims of this utility model and the accompanying drawings are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, product, or end comprising a series of steps or elements is not limited to the listed steps or elements but may optionally include steps or elements not listed therein, or may optionally include other steps or elements inherent to such process, method, product, or end.

[0031] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] This utility model discloses a specific implementation of a high-efficiency integrated digital controlled constant flow injection pump. Figure 1 The injection pump includes a pump cover 2 and a frame 1. The pump cover 2 is fixedly mounted on the top of the frame 1, that is, the frame 1 is fixedly mounted below the pump cover 2. A touch screen 11 is fixedly mounted on the front of the frame 1, and a plurality of connectors 12 for connecting to external devices or power supplies are fixedly mounted on the side of the frame 1. It should be noted that a controller can also be provided inside the frame 1, and the controller is electrically connected to electronic components such as the touch screen 11. Optionally, the frame 1 includes a panel, a left side panel, a right side panel, a bottom plate and a back plate, and the touch screen 11 is mounted on the panel. The panel, the left side panel, the right side panel, the bottom plate and the back plate together form an installation cavity for installing parts.

[0033] Combine Figure 2 and Figure 3 The pump cover 2 is provided with a liquid outlet channel 22 and a liquid inlet channel 21 which are independent of each other. In this embodiment, the liquid outlet of the liquid outlet channel 22 is connected to the right side of the pump cover 2, and the liquid inlet of the liquid inlet channel 21 is connected to the left side of the pump cover 2. The bottom surface of the pump cover 2 is provided with two first mounting holes 24 which are arranged at intervals and communicate with the liquid outlet channel 22, and two second mounting holes 23 which are arranged at intervals and communicate with the liquid inlet channel 21. Figure 4 Only one first mounting hole 24 and one second mounting hole 23 are shown. A liquid outlet one-way valve 26 is fixedly installed in each first mounting hole 24, and a liquid inlet one-way valve 25 is fixedly installed in each second mounting hole 23. Figure 4 It should be noted that the top of the first mounting hole 24 is in communication with the liquid outlet channel 22, the top of the second mounting hole 23 is in communication with the liquid outlet channel 22, and the bottoms of the first mounting hole 24 and the second mounting hole 23 are both in communication with the bottom surface of the pump cover 2. Optionally, threads can be provided on the wall of the first mounting hole 24 or the second mounting hole 23, and a nut 27 with external threads can be screwed into the mounting hole to secure the one-way valve. This one-way valve securing structure is easy to assemble and disassemble, and facilitates subsequent inspection and maintenance.

[0034] Combine Figure 5 and Figure 6, two bellows 3 are fixedly installed on the bottom surface of the pump cover 2, and each bellows 3 is arranged in a cylindrical shape so that the bottom end of the bellows 3 forms a closed structure, and the top end thereof forms an opening that is connected to the internal cavity. The two bellows 3 are arranged at intervals and sealed and fixed to the bottom surface of the pump cover 2. Optionally, the top end of each bellows 3 extends outward with a mounting portion 31, and the mounting portion 31 is arranged in a rectangular shape. The mounting portion 31 is evenly distributed with a plurality of countersunk holes arranged at intervals, and can be fixed to the bottom surface of the pump cover 2 by screws. In order to ensure sealing, a sealing gasket 32 ​​is provided between the top surface of the mounting portion 31 and the bottom surface of the pump cover 2. It should be noted that the sealing gasket 32, the bellows 3 and other components can be made of high-strength, strong acid and strong alkali resistant materials such as PTFE, high molecular weight UPE, and perfluoroether. This can increase the service life of the injection pump and can be applied to the transportation of various corrosive flows.

[0035] In this embodiment, each bellows 3 is connected to a corresponding liquid outlet one-way valve 26 and a liquid inlet one-way valve 25, so that two cavities with variable volumes are formed inside the injection pump.

[0036] Combine Figure 7 and Figure 8 The injection pump is provided with a driving mechanism 7 for driving the two bellows 3 to extend and retract in opposite directions in the vertical direction, so that when one of the bellows 3 performs a compression movement (the volume of the internal cavity decreases for compression movement), the other bellows 3 performs an extension movement (the volume of the internal cavity increases for extension movement).

[0037] In this embodiment, the drive mechanism 7 includes a drive motor 71, a driving pulley 72, a driven pulley 73, a timing belt 74, a transmission shaft 75, a left eccentric wheel 76, a right eccentric wheel 77, and a guide mechanism. The drive motor 71 is fixedly mounted on the inner bottom surface of the frame 1, the driving pulley 72 is fixedly mounted on the output shaft of the drive motor 71, and the transmission shaft 75 is arranged horizontally and rotatably mounted below the two bellows 3. Optionally, the inner bottom surface of the frame 1 is formed with an articulated seat, and the transmission shaft 75 is fixedly mounted on the articulated seat via a bearing 79, thereby realizing a rotatable installation of the transmission shaft 75, so that the transmission shaft 75 can rotate relative to the frame 1.

[0038] As an improvement, the left eccentric wheel 76 is fixedly mounted on the left side of the transmission shaft 75 and is located below one of the bellows 3. The right eccentric wheel 77 is fixedly mounted on the right side of the transmission shaft 75 and is located below the other bellows 3. The driven pulley 73 is fixedly sleeved on the outer peripheral side of the transmission shaft 75. The synchronous belt 74 is sleeved on the outer peripheral sides of the driving pulley 72 and the driven pulley 73. During operation, the drive motor 71 drives its output shaft to rotate, which drives the driving pulley 72 to rotate. With the assistance of the synchronous belt 74, the driving pulley 72 drives the driven pulley 73 to rotate. Since the driven pulley 73 is relatively fixed to the transmission shaft 75, the rotation of the driven pulley 73 drives the transmission shaft 75 and the left eccentric wheel 76 and the right eccentric wheel 77 fixed on both sides of the transmission shaft 75 to rotate together. The left eccentric wheel 76 and the right eccentric wheel 77 are both connected to the bottom of the corresponding bellows 3 through a guide assembly.

[0039] In order to enable the injection pump to discharge and inlet liquid at the same time, this embodiment improves the movement direction of the two bellows 3 so that the two bellows 3 can expand and contract in opposite directions under the drive of the same drive source (drive motor 71). Specifically, the left eccentric wheel 76 extends outwardly a first connecting portion 761 connected to the guide assembly, and the right eccentric wheel 77 extends outwardly a second connecting portion 771 connected to the guide assembly. It should be noted that the first connecting portion 761 is not on the central axis of the left eccentric wheel 76, and the second connecting portion 771 is not on the central axis of the right eccentric wheel 77. In the assembled state, the first connecting portion 761 and the second connecting portion 771 are staggered in the height direction, that is, the first connecting portion 761 and the second connecting portion 771 are on two horizontal planes of different heights. During operation, when the first connecting part 761 rotates to the highest point, the second connecting part 771 rotates to the lowest point. Since the left eccentric wheel 76 and the right eccentric wheel 77 are driven by the same transmission shaft 75, when the first connecting part 761 moves to the lowest point, the second connecting part 771 moves to the highest point, thereby causing the two bellows 3 connected by the first connecting part 761 and the second connecting part 771 through the guide assembly to telescope in opposite directions, so that when one of the bellows 3 is compressed, the other bellows 3 is stretched.

[0040] In this embodiment, the guide assembly includes a partition 5 fixedly mounted transversely within the frame 1. The partition 5 defines a guide hole, within which a guide member 4 is disposed. The guide member 4 can slide back and forth vertically along the guide hole. The top end of the guide member 4 is fixedly connected to the bottom end of the bellows 3. The bottom end of the guide member 4 is provided with a crank 78 connected to the first connecting portion 761 or the second connecting portion 771. Because the guide member 4 is limited by the guide hole, the bellows 3 only expands and contracts in the vertical direction, preventing shaking or swaying, thereby improving operational stability.

[0041] Optionally, a columnar body 33 extends downward from the bottom end of the bellows 3, and a sleeve 41 is formed at the top end of the guide member 4. The columnar body 33 is provided with a first transversely arranged through-hole, and the sleeve 41 is provided with a second transversely arranged through-hole. In the assembled state, the columnar body 33 is inserted into the sleeve 41, with the first through-hole and the second through-hole aligned in the transverse direction. A latch and a pin can be used to securely connect the bellows 3 and the guide member 4. A pair of spaced mounting ears 42 extend downward from the bottom end of the guide member 4. The top end of the crank 78 is inserted between the paired mounting ears 42 and hingedly connected to the mounting ears 42 via a hinge. The hinge can also be a pin, as long as the crank 78 can rotate relative to the guide member 4. A bearing 79 is provided at the bottom end of the crank 78. The outer ring of the bearing 79 is fixed to the crank 78, and the inner ring of the bearing 79 is fixedly connected to the first connecting portion 761 or the second connecting portion 771. It should be noted that the eccentric wheel, crank 78 and guide member 4 form a crank 78 slider mechanism, which can also be regarded as a cam mechanism, so that the rotation of the left eccentric wheel 76 or the right eccentric wheel 77 can be converted into reciprocating motion of the guide member 4 in the vertical direction, thereby guiding the movement direction of the bellows 3.

[0042] In this embodiment, a groove 51 is formed on the top surface of the partition 5, and a conduit 52 is provided below the partition 5. The top end of the conduit 52 passes through the partition 5 and communicates with the groove 51, while the bottom end of the conduit 52 passes through the bottom surface of the frame 1. If liquid leaks from the bellows 3 or at the connection between the bellows 3 and other components, the liquid will be discharged along the groove 51 and conduit 52 to the bottom of the frame 1. This provides a direct and immediate indication of a malfunction in the injection pump, providing guidance for subsequent inspection and maintenance.

[0043] In addition, a tensioning wheel 60 for adjusting the synchronous belt 74 is provided in the frame 1, which can adjust the tightness of the synchronous belt 74 to ensure the accuracy of liquid injection.

[0044] The working process of the injection pump of this embodiment is as follows: the driving motor 71 provides reciprocating power, and under the transmission of the synchronous belt 74 wheel assembly, the driving motor 71 drives the transmission shaft 75 to rotate, and the rotation of the transmission shaft 75 drives the left eccentric wheel 76 and the right eccentric wheel 77 to rotate, and under the guidance of the guide assembly, the two bellows 3 are expanded and contracted in opposite directions in the vertical direction to change the volume in the bellows 3, the volume increases in the liquid suction process, and the volume decreases in the liquid discharge process; since the two bellows 3 are arranged in opposite directions of expansion and contraction, when the volume of one bellows 3 becomes smaller, the volume of the other bellows 3 becomes larger, thus ensuring that when one bellows 3 is performing a liquid discharge action, the other bellows 3 is performing a liquid intake action; thereby achieving uninterrupted liquid intake and discharge, thereby improving the working efficiency of the injection pump and solving the problem of low working efficiency in the past.

[0045] The injection pump of this embodiment uses a bellows 3 as the primary carrier of the fluid. Its overall structure is simple and compact, offering high operational stability and facilitating maintenance and upkeep. The bellows 3 can be made of high-strength, acid- and alkali-resistant materials, thereby improving the pump's corrosion resistance and stability. This addresses the previous issues of a short service life and its inability to transport corrosive liquids. The injection pump of this embodiment utilizes a guide assembly to guide the movement of the bellows 3, significantly ensuring injection accuracy and addressing the previous issue of unstable injection accuracy caused by the significant wobbling caused by the bellows' telescopic movement. This further enhances operational stability.

[0046] Finally, it should be noted that the high-efficiency integrated CNC constant-flow injection pump disclosed in the embodiment of the present invention is only a preferred embodiment of the present invention, which is only used to illustrate the technical solution of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A high-efficiency integrated digitally controlled constant flow injection pump, characterized in that: include: A pump cover is provided with a liquid outlet channel and a liquid inlet channel which are independent of each other. The bottom surface of the pump cover is provided with two first mounting holes which are spaced apart and communicate with the liquid outlet channel, and two second mounting holes which are spaced apart and communicate with the liquid inlet channel. A liquid outlet one-way valve is fixedly installed in each of the first mounting holes, and a liquid inlet one-way valve is fixedly installed in each of the second mounting holes. Two bellows, each of which is cylindrically arranged so that the bottom end of the bellows forms a closed structure and the top end forms an opening communicating with the internal cavity, the two bellows are spaced apart and sealed and fixed to the bottom surface of the pump cover, and each bellows is correspondingly communicated with a liquid outlet check valve and a liquid inlet check valve; The driving mechanism is used to drive the two bellows to expand and contract in opposite directions in the vertical direction, so that when one of the bellows performs a compression movement, the other bellows performs an extension movement.

2. A high-efficiency integrated digitally controlled constant flow liquid injection pump according to claim 1, characterized in that: A mounting portion extends outward from the top end of each bellows, and the mounting portion is fixed to the bottom surface of the pump cover by screws.

3. A high-efficiency integrated digitally controlled constant flow liquid injection pump according to claim 2, characterized in that: A sealing gasket is provided between the top surface of the mounting portion and the bottom surface of the pump cover.

4. The high-efficiency integrated digitally controlled constant flow liquid injection pump according to claim 1, characterized in that: It also includes a frame, which is fixedly installed below the pump cover, and the driving mechanism is installed in the frame.

5. The high-efficiency integrated digitally controlled constant flow liquid injection pump according to claim 4, characterized in that: The driving mechanism includes a driving motor, a driving pulley, a driven pulley, a synchronous belt, a transmission shaft, a left eccentric wheel and a right eccentric wheel; The driving motor is fixedly mounted on the inner bottom surface of the frame, the driving pulley is fixedly mounted on the output shaft of the driving motor, the transmission shaft is arranged transversely and rotatably mounted below the two bellows, the left eccentric wheel is fixedly mounted on the left side of the transmission shaft and is located below one of the bellows, the right eccentric wheel is fixedly mounted on the right side of the transmission shaft and is located below the other bellows, the driven pulley is fixedly sleeved on the outer peripheral side of the transmission shaft, and the synchronous belt is sleeved on the outer peripheral sides of the driving pulley and the driven pulley; The left eccentric wheel and the right eccentric wheel are both connected to the corresponding bottom of the corrugated pipe through a guide assembly.

6. The high-efficiency integrated digitally controlled constant flow liquid injection pump according to claim 5, characterized in that: The left eccentric wheel extends outwardly to form a first connection portion connected to the guide assembly, and the right eccentric wheel extends outwardly to form a second connection portion connected to the guide assembly; The first connecting portion and the second connecting portion are staggered in the height direction.

7. The high-efficiency integrated digitally controlled constant flow liquid injection pump according to claim 6, characterized in that: The guide assembly includes a partition fixedly installed laterally inside the frame, the partition is provided with a guide hole, a guide member is provided in the guide hole, the guide member can slide back and forth in the height direction along the guide hole, the top end of the guide member is fixedly connected to the bottom end of the bellows, and the bottom end of the guide member is provided with a crank connected to the first connecting part or the second connecting part.

8. The high-efficiency integrated digitally controlled constant flow liquid injection pump according to claim 7, characterized in that: A columnar body extends downward from the bottom end of the corrugated tube, a sleeve is formed on the top end of the guide member, the columnar body is provided with a first through hole arranged transversely, and the sleeve is provided with a second through hole arranged transversely; In an assembled state, the column is inserted into the sleeve, and the first through hole is aligned with the second through hole in a transverse direction.

9. The high-efficiency integrated digitally controlled constant flow liquid injection pump according to claim 7, characterized in that: A pair of spaced mounting ears extend downward from the bottom end of the guide member, the top end of the crank is inserted between the pair of mounting ears, and the top end of the crank is hinged to the mounting ears via a hinge member; A bearing is provided at the bottom end of the crank, an outer ring of the bearing is fixed to the crank, and an inner ring of the bearing is fixedly connected to the first connecting portion or the second connecting portion.

10. The high-efficiency integrated digitally controlled constant flow liquid injection pump according to claim 7, characterized in that: A groove is provided on the top surface of the partition, and a conduit is provided below the partition. The top end of the conduit passes through the partition and communicates with the groove, and the bottom end of the conduit passes through the bottom surface of the frame.

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