CN112630360B

CN112630360B - Four-phase cam pump for ion chromatograph

Info

Publication number: CN112630360B
Application number: CN202011471687.9A
Authority: CN
Inventors: 熊永莲; 严军; 杨国欣; 潘金安
Original assignee: Yancheng Institute of Technology
Current assignee: Yancheng Institute of Technology
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2022-10-25
Anticipated expiration: 2040-12-14
Also published as: CN112630360A

Abstract

The invention belongs to the technical field of ion chromatographs, and particularly relates to a four-phase cam pump for an ion chromatograph, which comprises a pump body shell, a pipeline switching shell, an operating panel and a supporting bottom plate, wherein a driving cavity, a transformation cam cavity, a fixed cam cavity, a gear moving cavity, a cam moving cavity and two infusion cavities are arranged in the pump body shell, a driving motor is arranged in the driving cavity, a worm and a first spline shaft are movably arranged in the driving cavity, a worm wheel is sleeved on the outer side of the first spline shaft and meshed with the worm, the left end of the worm is connected with a rotor of the driving motor, an adjusting gear is movably sleeved on the outer side of the first spline shaft, a second spline shaft is movably arranged in the transformation cam cavity, and the inlet of a mobile phase can be switched at will through the switching of an electromagnetic valve and the use of a one-way valve, so that a suction joint is prevented from being connected reversely.

Description

Four-phase cam pump for ion chromatograph

Technical Field

The invention relates to the technical field of ion chromatographs, in particular to a four-phase cam pump for an ion chromatograph.

Background

Ion chromatography is a type of high performance liquid chromatography, in which a high pressure liquid transfer pump delivers a mobile phase to an analysis system at a constant flow rate (or pressure), a sample is introduced by a sample injector before a chromatographic column, the mobile phase carries the sample into the chromatographic column, components are separated in the chromatographic column and sequentially flow with the mobile phase to a detector. Ion chromatography is mainly used for analysis of environmental samples, including anions and cations in samples such as surface water, drinking water, rainwater, domestic sewage, industrial wastewater, acid sediments, atmospheric particulates and the like, and trace impurities in water and reagents related to the microelectronic industry.

The stroke of an infusion pump in the existing four-phase cam pump is fixed, a new four-phase cam pump needs to be replaced when the stroke needs to be short, so that the time of an experiment is delayed, the suction joint of the existing four-phase cam pump is fixed, the suction joint needs to be connected strictly according to requirements when the four-phase cam pump is connected, and if the connection is reversed, the suction joint needs to be reconnected.

Disclosure of Invention

The invention aims to provide a four-phase cam pump for an ion chromatograph, which aims to solve the problem that the existing four-phase cam pump in the background art cannot meet the experimental requirement.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a four-phase cam pump for ion chromatograph, includes pump body shell, pipeline switching shell, operating panel and supporting baseplate, pump body shell's inside is provided with drive chamber, transform cam chamber, fixed cam chamber, gear shift chamber, cam shift chamber and transfusion chamber, the gear shift chamber is located the upside in drive chamber, the cam shift chamber is located the top in transform cam chamber, transfusion chamber's quantity is two, the internally mounted in drive chamber has driving motor, the inside movable mounting in drive chamber has worm and a integral key shaft, the outside cover of integral key shaft is equipped with the worm wheel, worm wheel and worm meshing, the left end of worm is connected with driving motor's rotor, the outside movable cover of integral key shaft is equipped with adjusting gear, the inside movable mounting in transform cam chamber has No. two integral key shafts, the outer side of the second spline shaft is movably sleeved with an adjusting cam, the outer side of the second spline shaft is sleeved with a first driven gear, the first driven gear is matched with the adjusting gear, the inner part of the fixed cam cavity is movably provided with a driven shaft, the outer side of the driven shaft is sleeved with a second driven gear and a four-phase cam, the second driven gear is matched with the adjusting gear, electric push rods are respectively arranged in the gear moving cavity and the cam moving cavity, the top end of a telescopic rod of each electric push rod is connected with a push plate, the push plates in the gear moving cavity are clamped on the outer side of the adjusting gear, the push plates in the cam moving cavity are clamped on the outer side of the adjusting cam, infusion pumps are respectively arranged in the two infusion cavities, the left sides of piston rods of the two infusion pumps are respectively connected with a pushing device, and the left side of the pushing device is attached to the outer side of the adjusting cam, front side thrust unit's left side and the laminating in the outside of four phase cam, two all seted up exit on the body of transfer pump, install check valve and solenoid valve in the pipeline switching shell, the quantity of check valve is four, the quantity of solenoid valve is eight, two the check valve passes through pipe connection and is a check valve group, two the solenoid valve has one solenoid valve group through pipe connection, two the left side of check valve group is connected with two solenoid valve groups through the pipeline respectively, four the right side of check valve is connected with the solenoid valve of two solenoid valve groups on the right side through the pipeline respectively, and two right side solenoid valve groups all have a suction joint through pipe connection, four left sides the solenoid valve respectively through pipeline and two exit on the transfer pump body is connected, driving motor, two electric putter and eight solenoid valve all are connected with operating panel through the wire, spacing guide way has all been seted up on the chamber wall in gear removal chamber and the cam removal chamber, two the left and right side of slurcam all is provided with the guide block, two the guide block of slurcam is pegged graft respectively in the spacing guide way in gear removal chamber and the spacing guide way in the cam removal chamber.

Preferably, two equal movable mounting in front and back side of infusion chamber has the leading wheel, the leading wheel of infusion intracavity both sides is laminated with the front and back side of the thrust unit in this infusion intracavity respectively.

Preferably, the pushing device comprises a bottom plate, fixed baffles are arranged at the front and back of the left side of the bottom plate, and a roller is movably connected between the two fixed baffles.

Preferably, the outer side of the roller is arc-shaped.

Preferably, the pump body shell, the pipeline switching shell and the operation panel are all installed on the upper side of the supporting base plate, and the caster wheels are movably installed on the lower side of the supporting base plate.

Preferably, the outer side of the supporting bottom plate is movably connected with a handle.

Preferably, with the front side two solenoid valves that the transfer pump is connected pass through series circuit and connect, with the rear side two solenoid valves that the transfer pump is connected pass through series circuit and connect, and the right side is two solenoid valve in the solenoid valve group passes through series circuit with the solenoid valve in another solenoid valve group and connects, remains two the solenoid valve passes through series circuit and connects.

Compared with the prior art, the invention has the beneficial effects that:

1) When the infusion pump works normally, the second driven gear is meshed with the adjusting gear, the four-phase cam drives the piston rod of the front infusion pump to reciprocate through the front pushing device, when the stroke of the piston rod of the infusion pump during reciprocating motion needs to be adjusted, the position of the adjusting gear can be moved, so that the adjusting gear is meshed with the first driven gear, then the position of the adjusting cam is moved, the eccentric distance of the adjusting cam is changed, and the stroke of the piston rod of the rear infusion pump during reciprocating motion is changed;

2) The inlet of the mobile phase can be switched at will by switching the electromagnetic valve and using the one-way valve, so that the suction joint is prevented from being reversely connected.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic cross-sectional top view of the pump body housing of the present invention;

FIG. 3 isbase:Sub>A schematic cross-sectional view taken along line A-A of FIG. 2 according to the present invention;

FIG. 4 is a schematic cross-sectional view taken along line B-B of FIG. 2 in accordance with the present invention;

FIG. 5 is a schematic top view of the pushing device of the present invention;

fig. 6 is a schematic diagram of the internal structure of the pipe switching housing according to the present invention.

In the figure: the automatic control device comprises a support base plate 1, casters 2, a handle 3, a pump body shell 4, a pipeline switching shell 5, a suction joint 6, an operation panel 7, a driving cavity 71, a cam cavity 72 for changing, a cam cavity 73 for fixing, a cam cavity 74 for infusion, a gear moving cavity 75, a cam moving cavity 76, a driving motor 8, a worm 9, a worm wheel 10, a spline shaft 11I, a spline shaft 12 for adjusting, a spline shaft 13 II, a spline shaft 14 for adjusting, a guide wheel 15, a driven gear 16I, a cam 17 for four phases, a driven shaft 18, a driven gear 19 II, an infusion pump 20, a pushing device 21, a base plate 211, a fixing baffle 212, a roller 213, a pushing plate 22, a guide groove 23, an electric push rod 24, a one-way valve 25 and an electromagnetic valve 26.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

Example (b):

referring to fig. 1-6, the present invention provides a technical solution: a four-phase cam pump for an ion chromatograph comprises a pump body shell 4, a pipeline switching shell 5, an operation panel 7 and a support base plate 1, wherein a driving cavity 71, a transformation cam cavity 72, a fixed cam cavity 73, a gear moving cavity 75, a cam moving cavity 76 and an infusion cavity 74 are arranged inside the pump body shell 4, the gear moving cavity 75 is located on the upper side of the driving cavity 71, the cam moving cavities 76 are located above the transformation cam cavity 72, the number of the infusion cavities 74 is two, a driving motor 8 is installed inside the driving cavity 71, a worm 9 and a spline shaft 11 are movably installed inside the driving cavity 71, a worm wheel 10 is sleeved outside the spline shaft 11, the worm wheel 10 is meshed with a worm 9, the left end of the worm 9 is connected with a rotor of the driving motor 8, an adjusting gear 12 is movably sleeved outside the spline shaft 11, a spline shaft 13 is movably installed inside the transformation cam cavity 72, an adjusting cam 14 is movably sleeved on the outer side of a second spline shaft 13, a first driven gear 16 is sleeved on the outer side of the second spline shaft 13, the first driven gear 16 is matched with the adjusting gear 12, a driven shaft 18 is movably installed inside a fixed cam cavity 73, a second driven gear 19 and a four-phase cam 17 are sleeved on the outer side of the driven shaft 18, the second driven gear 19 is matched with the adjusting gear 12, electric push rods 24 are installed inside a gear moving cavity 75 and a cam moving cavity 76, the top ends of telescopic rods of the electric push rods 24 are connected with pushing plates 22, the pushing plates 22 in the gear moving cavity 75 are clamped on the outer side of the adjusting gear 12, the pushing plates 22 in the cam moving cavity 76 are clamped on the outer side of the adjusting cam 14, infusion pumps 20 are installed inside the two infusion cavities 74, the left sides of piston rods of the two infusion pumps 20 are connected with a pushing device 21, and a return spring is arranged in the infusion pumps 20, when a piston rod of the infusion pump 20 is free from external force, the piston rod is pulled by a return spring to move leftwards, the left side of the rear side pushing device 21 is attached to the outer side of the adjusting cam 14, the left side of the front side pushing device 21 is attached to the outer side of the four-phase cam 17, inlets and outlets are formed in the bodies of the two infusion pumps 20, check valves 25 and electromagnetic valves 26 are installed in the pipeline switching shell 5, the number of the check valves 25 is four, the number of the electromagnetic valves 26 is eight, the four check valves 25 are respectively marked as LV1, LV2, LV3 and LV4, wherein LV1 and LV3 can only enter from the left and exit from the right, LV2 and LV4 can only enter from the right, the eight electromagnetic valves 26 are respectively marked as DC1, DC2, DC3, DC4, DC5, DC6, DC7 and DC8, the two check valves 25 are connected into a check valve group through a pipeline, the two electromagnetic valve groups 26 are connected into an electromagnetic valve group through a pipeline, the left sides of the two check valve groups are respectively connected with the two electromagnetic valve groups through a pipeline, the right sides of the four check valves 25 are respectively connected with the electromagnetic valves 26 of the two right electromagnetic valve groups through pipelines, the two right electromagnetic valve groups are respectively connected with the suction joint 6 through pipelines, the four left electromagnetic valves 26 are respectively connected with the inlets and the outlets on the bodies of the two infusion pumps 20 through pipelines, the driving motor 8, the two electric push rods 24 and the eight electromagnetic valves 26 are respectively connected with the operation panel 7 through leads, wherein DC1, DC3, LV1 and LV2 are respectively connected with each other through pipelines, the other end of LV1 is connected with DC5 through a pipeline, the other end of LV2 is connected with DC6 through a pipeline, DC2, DC4, LV3 and LV4 are respectively connected with each other through pipelines, the other end of LV3 is connected with DC7 through a pipeline, the other end of LV4 is connected with DC8 through a pipeline, the other ends of DC5 and DC6 are connected with one suction joint 6 through a pipeline, the other ends of DC7 and DC8 are connected with the other suction joint 6 through a pipeline, the DC1 and the DC2 are connected with two inlets and outlets on the body of the rear-side infusion pump 20 through pipelines, and the DC3 and the DC4 are connected with two inlets and outlets on the body of the front-side infusion pump 20 through pipelines.

Limiting guide grooves 23 are formed in the cavity walls of the gear moving cavity 75 and the cam moving cavity 76, guide blocks are arranged on the left side and the right side of the two pushing plates 22, and the guide blocks of the two pushing plates 22 are respectively inserted into the limiting guide grooves 23 of the gear moving cavity 75 and the limiting guide grooves 23 of the cam moving cavity 76.

Guide wheels 15 are movably mounted on the front side and the rear side of each of the two infusion cavities 74, and the guide wheels 15 on the two sides in the infusion cavities 74 are respectively attached to the front side and the rear side of the pushing device 21 in the infusion cavities 74.

The pushing device 21 comprises a bottom plate 211, fixed baffles 212 are respectively arranged at the front and the rear of the left side of the bottom plate, and a roller 213 is movably connected between the two fixed baffles 212.

The outer side of the roller 213 is curved.

The pump body shell 4, the pipeline switching shell 5 and the operation panel 7 are all installed on the upper side of the supporting base plate 1, and the caster wheels 2 are movably installed on the lower side of the supporting base plate 1.

The outer side of the supporting bottom plate 1 is movably connected with a handle 3.

With the front side two solenoid valves 26 that the transfer pump 20 is connected pass through series circuit and connect, and DC3 and DC4 pass through series circuit and connect, with the rear side two solenoid valves 26 that the transfer pump 20 is connected pass through series circuit and connect, and DC1 and DC2 pass through series circuit and connect, and the right side is two solenoid valve 26 in the solenoid valve group and solenoid valve 26 in another solenoid valve group pass through series circuit and connect, and DC5 and DC8 pass through series circuit and connect, remain two solenoid valve 26 passes through series circuit and connects, and DC6 and DC7 pass through series circuit and connect.

The working principle is as follows: during normal operation, the second driven gear 19 is meshed with the adjusting gear 12, the driving motor 8 is started, the driving motor 8 drives the worm 9 to rotate, the worm 9 drives the worm wheel 10 to rotate, the worm wheel 10 drives the first spline shaft 11 to rotate, the first spline shaft 11 drives the adjusting gear 12 to rotate, the adjusting gear 12 drives the second driven gear 19 to rotate, the second driven gear 19 drives the driven shaft 18 to rotate, the driven shaft 18 drives the four-phase cam 17 to rotate, the four-phase cam 17 rotates to drive the front side pushing device 21 to move left and right, the front side pushing device 21 drives the piston rod of the front side infusion pump 20 to reciprocate, and the piston rod of the front side infusion pump 20 reciprocates to push the mobile phase to flow in the ion chromatograph;

when the stroke of the piston rod of the infusion pump 20 in the reciprocating motion needs to be adjusted, the electric push rod 24 in the gear moving cavity 75 is started, the electric push rod 24 pushes the push plate 22 in the gear moving cavity 75, the push plate 22 drives the adjusting gear 12 to move backwards, after the adjusting gear 12 is meshed with the first driven gear 16, the adjusting gear 12 drives the first driven gear 16 to rotate, the first driven gear 16 drives the second spline shaft 13 to rotate, the second spline shaft 13 drives the adjusting cam 14 to rotate, the adjusting cam 14 can drive the rear side pushing device 21 to move left and right, the rear side pushing device 21 drives the piston rod of the rear side infusion pump 20 to do the reciprocating motion, the piston rod of the rear side infusion pump 20 can push the mobile phase to flow in the ion chromatograph in the reciprocating motion, then the electric push rod 24 in the cam moving cavity 76 is started, the electric push rod 24 pushes the push plate 22 in the cam moving cavity 76, the push plate 22 drives the adjusting cam 14 to move back and forth, the stroke of the adjusting cam 14 to move back and forth can change the stroke of the rear side pushing device 21, and forth the stroke of the piston rod of the rear side infusion pump 20 when the piston rod in the reciprocating motion is the reciprocating motion, the stroke of the rear side infusion pump 21;

when the front-side infusion pump 20 works, the DC3 and the DC4 in the electromagnetic valve 26 are switched on, the DC1 and the DC2 in the electromagnetic valve 26 are closed, when the rear-side infusion pump 20 works, the DC1 and the DC2 in the electromagnetic valve 26 are switched on, the DC3 and the DC4 in the electromagnetic valve 26 are closed, when the mobile phase enters from the upper suction connector 6 and flows out from the lower suction connector 6, the DC6 and the DC7 in the electromagnetic valve 26 are opened, the DC5 and the DC8 in the electromagnetic valve 26 are closed, when the mobile phase enters from the lower suction connector 6 and flows out from the upper suction connector 6, the DC5 and the DC8 in the electromagnetic valve 26 are opened, and the DC6 and the DC7 in the electromagnetic valve 26 are closed.

While there have been shown and described the fundamental principles and essential features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not to be construed as limiting the claims.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a four-phase cam pump for ion chromatograph, includes pump body shell (4), pipeline switching shell (5), operating panel (7) and supporting baseplate (1), its characterized in that: the inside of pump body shell (4) is provided with drive chamber (71), transform cam chamber (72), fixed cam chamber (73), gear shift chamber (75), cam shift chamber (76) and infusion chamber (74), gear shift chamber (75) are located the upside of drive chamber (71), cam shift chamber (76) are located the top of transform cam chamber (72), the quantity of infusion chamber (74) is two, the internally mounted of drive chamber (71) has driving motor (8), the inside movable mounting of drive chamber (71) has worm (9) and a integral key shaft (11), the outside cover of integral key shaft (11) is equipped with worm wheel (10), worm wheel (10) and worm (9) meshing, the left end of worm (9) is connected with the rotor of driving motor (8), the outside movable sleeve of an integral key shaft (11) is equipped with adjusts spline shaft (12), the inside movable mounting of transform cam chamber (72) has No. two spline shaft (13), the outside movable sleeve of No. two regulation cam (13) is equipped with No. 16, the movable sleeve is equipped with No. one number one driven shaft (16) and No. 16) the driven shaft (13) is equipped with the movable gear (16) outside of the fixed cam chamber (14), the driven shaft (16), the outside cover of driven shaft (18) is equipped with No. two driven gear (19) and four phase cam (17), no. two driven gear (19) and adjusting gear (12) looks adaptation, electric putter (24) are all installed to the inside in gear shifting chamber (75) and cam shifting chamber (76), electric putter (24)'s telescopic link top is connected with slurcam (22), slurcam (22) card in gear shifting chamber (75) is in the outside of adjusting gear (12), slurcam (22) card in cam shifting chamber (76) is in the outside of adjusting cam (14), two transfusion pump (20) are all installed to the inside of transfusion chamber (74), two transfusion pump (20) are all connected with thrust unit (21) on the left of the piston rod of transfusion pump (20), the rear side the left side of thrust unit (21) is laminated with the outside of adjusting cam (14), the front side the left side of thrust unit (21) is laminated with the outside of four phase cam (17) on the body of transfusion pump (20), exit has all been seted up on the one-way switch shell (5), install in pipeline switch shell (5) and four check valves (25) and be connected valve valves (26), one-way valve group is connected valve (25) is eight solenoid valve valves (26), two solenoid valve (26) have one solenoid valve group through the pipe connection, two the left side of check valve group is connected with two solenoid valve groups through the pipeline respectively, four the right side of check valve (25) is connected with solenoid valve (26) of two solenoid valve groups on the right side through the pipeline respectively, and two right side solenoid valve groups all have suction joint (6), four left sides solenoid valve (26) are respectively through pipeline and two exit on the transfer pump (20) body is connected, driving motor (8), two electric putter (24) and eight solenoid valve (26) all are connected with operating panel (7) through the wire, gear removes all seted up spacing guide way (23) on the chamber wall in chamber (75) and cam removal chamber (76), two the side all is provided with the guide block about slurcam (22), two the guide block of slurcam (22) is pegged graft respectively in spacing guide way (23) in gear removal chamber (75) and the spacing guide way (23) in cam removal chamber (76).

2. A four-phase lobe pump for an ion chromatograph according to claim 1, wherein: the front side and the rear side of the two infusion cavities (74) are respectively movably provided with a guide wheel (15), and the guide wheels (15) on the two sides in the infusion cavities (74) are respectively attached to the front side and the rear side of a pushing device (21) in the infusion cavities (74).

3. A four-phase lobe pump for an ion chromatograph according to claim 1, wherein: the pushing device (21) comprises a bottom plate (211), fixed baffles (212) are mounted at the front and back of the left side of the bottom plate, and a roller (213) is movably connected between the two fixed baffles (212).

4. A four-phase lobe pump for an ion chromatograph according to claim 3, wherein: the outer side of the roller (213) is arc-shaped.

5. The four-phase lobe pump for an ion chromatograph of claim 1, wherein: the pump body shell (4), the pipeline switching shell (5) and the operation panel (7) are all installed on the upper side of the supporting base plate (1), and the lower side of the supporting base plate (1) is movably provided with the caster wheels (2).

6. A four-phase lobe pump for an ion chromatograph according to claim 1, wherein: the outer side of the supporting bottom plate (1) is movably connected with a handle (3).

7. A four-phase lobe pump for an ion chromatograph according to claim 1, wherein: with the front side two solenoid valves (26) that transfer pump (20) are connected are through series circuit connection, with the rear side two solenoid valves (26) that transfer pump (20) are connected are through series circuit connection, and the right side is two solenoid valve (26) in one solenoid valve group in the solenoid valve group are through series circuit connection with solenoid valve (26) in another solenoid valve group, remain two solenoid valve (26) are through series circuit connection.