Ultrahigh pressure liquid chromatography pump

Abstract

The utility model relates to the technical field of chromatographic pumps, in particular to an ultrahigh-pressure liquid chromatographic pump which comprises a bottom plate, a pump body is arranged above the bottom plate and close to the left side, two supporting plates for fixing the pump body are fixed on the upper surface of the bottom plate and close to the left side, and a plunger rod is inserted into the right end of the pump body. Two fixing plates are fixed to the positions, close to the right end, of the upper surface of the bottom plate, a crankshaft is rotationally installed between the two fixing plates, the middle of the crankshaft is sleeved with a rotating sleeve, the right end of the plunger rod is connected with the crankshaft through a connecting rod, the base end of the connecting rod is hinged to the plunger rod, and the right end of the connecting rod is hinged to the rotating sleeve. The swing rods are installed on the two sides of the crankshaft, the connecting columns are clamped on the swing rods, the positions of the connecting columns on the swing rods can be adjusted, and therefore the reciprocating stroke of the plunger rod is changed. The reciprocating distance of the plunger rod can be changed by adjusting the relative position of the connecting column, so that the pumping quantity of the chromatographic pump is adjusted, and different actual use requirements are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to chromatographic pump technical field, especially in kind of ultrahigh pressure liquid chromatography pump. BACKGROUND

[0002] Chromatographic pump is the key component in liquid chromatography system, and is mainly used for accurately conveying mobile phase to ensure the accuracy and stability of chromatographic analysis. Its type is various, and can be applied to multiple fields, such as medical health, environmental protection, chemical industry, biological industry, pharmacy and the like.

[0003] Chromatographic pump is generally worked by using plunger pump, reciprocating motion of plunger rod of plunger pump is driven by motor driving crankshaft, so that plunger pump works, and reciprocating stroke of plunger rod is fixed and cannot be adjusted, so that pump-out quantity of plunger pump is fixed, and pump liquid quantity of chromatographic pump cannot be adjusted according to actual use demand, and there is deficiency in use flexibility. UTILITY MODEL CONTENTS

[0004] The utility model discloses in order to solve the problem that the pump-out quantity of chromatographic pump is fixed, pump liquid quantity of chromatographic pump cannot be adjusted according to actual use demand, and proposes a kind of ultrahigh pressure liquid chromatography pump.

[0005] In order to solve the above technical problem, the utility model is realized by the following technical scheme: a kind of ultrahigh pressure liquid chromatography pump, including bottom plate, pump body is arranged on the upper side of bottom plate near left side, and the upper surface of bottom plate is fixed with two support plates for fixing pump body near left side, plunger rod is inserted into the right end of pump body, the upper surface of bottom plate is fixed with two fixed plates near right end position, two fixed plates are rotatably installed with crankshaft, and the middle part of crankshaft is sleeved with rotating sleeve, the right end of plunger rod is connected with crankshaft by connecting rod, the seat end of connecting rod is articulated with plunger rod, and the right end of connecting rod is articulated with rotating sleeve;

[0006] Crankshaft includes two rotatable shafts rotatably installed on fixed plate and connecting column arranged between two rotatable shafts, one side of one fixed plate is fixed with rotating motor for driving rotatable shaft to rotate, the opposite end of two rotatable shafts is fixed with swing lever extending to right side, the both ends of connecting column are clamped on two sides swing lever, and connecting column can adjust position on swing lever.

[0007] As preferred scheme, the left end of pump body is fixed with first check valve, and the front side of pump body is fixed with second check valve, the left end of first check valve is fixed with liquid outlet pipe, one end of second check valve is fixed with liquid inlet pipe, and the inner side of pump body is provided with pump cavity opening to right.

[0008] As preferred scheme, the both ends of connecting column are provided with guide clamping groove, and the outer side of connecting column is screw-mounted with locking screw at the position corresponding to guide clamping groove.

[0009] As a preferred solution, the end part of the locking screw is fixed with a ball head, and the side surface of the swing rod is provided with a plurality of locking grooves matched with the ball head.

[0010] As a preferred solution, the width of the swing rod is the same as the width of the guiding clamping groove, and the distance between the front and rear swing rods is the same as the distance between the bottoms of the front and rear guiding clamping grooves.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] The utility model discloses a swing rod is installed on the both sides of the crankshaft, and the connecting column is clamped on the swing rod, and the connecting column can be adjusted in position on the swing rod, thereby changing the reciprocating stroke of the plunger rod. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the whole structure schematic diagram of the utility model;

[0014] Figure 2 It is the pump body schematic diagram of the utility model;

[0015] Figure 3 It is the crankshaft schematic diagram of the utility model;

[0016] Figure 4 It is the connecting column schematic diagram of the utility model;

[0017] Figure 5 It is the locking screw schematic diagram of the utility model;

[0018] Figure 6 It is the swing rod schematic diagram of the utility model.

[0019] In the drawing: 1, support plate;2, pump body;21, liquid outlet pipe;22, first check valve;23, second check valve;24, liquid inlet pipe;25, pump cavity;3, plunger rod;4, connecting rod;5, crankshaft;51, rotating shaft;52, swing rod;521, locking groove;53, connecting column;531, locking screw;5311, ball head;532, guiding clamping groove;6, fixed plate;7, rotating sleeve;8, rotating motor;9, bottom plate. DETAILED DESCRIPTION

[0020] As Figure 1As shown in the figure, a kind of ultra-high pressure liquid chromatography pump, including bottom plate 9, pump body 2 is provided on the bottom plate 9, and the upper surface of the bottom plate 9 is fixed with two support plates 1 for fixing pump body 2 near the left side, the right end of pump body 2 is inserted with plunger rod 3, the upper surface of the bottom plate 9 is fixed with two fixed plates 6 near the right end position, the crankshaft 5 is rotatably installed between the two fixed plates 6, and the rotating sleeve 7 is sleeved on the middle part of the crankshaft 5, the right end of the plunger rod 3 is connected with the crankshaft 5 through the connecting rod 4, the seat end of the connecting rod 4 is hinged with the plunger rod 3, and the right end of the connecting rod 4 is hinged with the rotating sleeve 7, the crankshaft 5 rotates to drive the connecting rod 4 to drag the plunger rod 3 to reciprocate, so as to realize the pumping work of pump body 2.

[0021] As Figure 3 Shown, crankshaft 5 includes two rotating shafts 51 rotatably installed on fixed plate 6 and connecting column 53 arranged between two rotating shafts 51, one side of one of the fixed plates 6 is fixed with rotating motor 8 for rotating rotating shaft 51, the opposite end of the two rotating shafts 51 is fixed with swing lever 52 extending to the right side, the two ends of connecting column 53 are respectively clamped on the swing lever 52 on both sides, and the connecting column 53 can be adjusted in position on the swing lever 52, the adjustment of the position of the connecting column 53 on the swing lever 52 is adjusted, so as to realize the adjustment of the rotating radius of the whole crankshaft 5, the change of the rotating radius of the crankshaft 5 changes the activity range of the connecting rod 4, so as to further change the stroke of the plunger rod 3, so as to change the pumping capacity of the chromatography pump.

[0022] As Figure 2 Shown, the left end of pump body 2 is fixed with first one-way valve 22, and the front side of pump body 2 is fixed with second one-way valve 23, the left end of first one-way valve 22 is fixed with liquid outlet pipe 21, one end of second one-way valve 23 is fixed with liquid inlet pipe 24, the inner side of pump body 2 is provided with pump cavity 25 opening to the right, pump body 2 makes one-way liquid outlet through liquid outlet pipe 21 and first one-way valve 22, and realizes one-way liquid inlet through liquid inlet pipe 24 and second one-way valve 23.

[0023] As Figure 4 Shown, the two ends of connecting column 53 are provided with guide clamping grooves 532, and the outer side of connecting column 53 is threadedly installed with locking screw 531 at the position corresponding to guide clamping groove 532, connecting column 53 is clamped on swing lever 52 by sliding through guide clamping groove 532, and is locked and fixed after adjustment by locking screw 531.

[0024] As Figure 5 Shown, the end of locking screw 531 is fixed with ball head 5311, the side surface of swing lever 52 is provided with a plurality of lock grooves 521 matched with ball head 5311, when adjusting the position of connecting column 53, ball head 5311 is clamped in lock groove 521 to be locked and fixed by screwing locking screw 531.

[0025] AsFigure 6 As shown, the width of the swing rod 52 is the same as the width of the guide slot 532, so that the guide slot 532 can stably guide the swing rod 52;

[0026] The distance between the front and rear swing rods 52 is the same as the distance between the bottoms of the front and rear guide slots 532, so that the connecting column 53 can be stably installed between the two swing rods 52 and stably adjusted in position.

[0027] In the embodiment, when the chromatographic pump is working, the rotating motor 8 drives the rotating shaft 51 to rotate, the rotating shaft 51 drives the swing rod 52 to swing, and the swing rod 52 drives the connecting column 53 to perform ring motion, at this time, the connecting column 53 drives the connecting rod 4 to drag the plunger rod 3 to reciprocate, and the reciprocation of the plunger rod 3 realizes the pump liquid work in cooperation with the one-way liquid inlet of the liquid inlet pipe 24 and the second one-way valve 23 and the one-way liquid outlet of the liquid outlet pipe 21 and the first one-way valve 22.

[0028] When the pump liquid amount of the chromatographic pump is adjusted, the locking screw 531 is loosened to move the connecting column 53 to the right, and after the position of the connecting column 53 is adjusted, the locking screw 531 is locked and fixed again, at this time, when the crankshaft 5 rotates, the radius of the ring of the connecting column 53 is increased, so that the stroke of the plunger rod 3 is increased, so that the pump liquid amount of the chromatographic pump is adjusted, and vice versa.

[0029] The above is the preferred embodiment of the present application, and the person skilled in the art of the present application can also change and modify the above embodiment, therefore, the present application is not limited to the above specific embodiments, and any obvious improvement, replacement or modification made by the person skilled in the art on the basis of the present application belongs to the protection scope of the present application.

Claims

1. An ultra-high pressure liquid chromatography pump characterized by: The utility model provides a pump, including bottom plate (9), the pump body (2) is arranged above the bottom plate (9) near left side position, and the upper surface of bottom plate (9) is fixed with two support plate (1) near left side, the right end of pump body (2) inserts plunger rod (3), the upper surface of bottom plate (9) is fixed with two fixed plate (6) near right end position, two rotatingly installed crankshaft (5) between fixed plate (6), and the middle part of crankshaft (5) is sleeved with rotating sleeve (7), the right end of plunger rod (3) is connected with crankshaft (5) through connecting rod (4), the seat end of connecting rod (4) is articulated with plunger rod (3), and the right end of connecting rod (4) is articulated with rotating sleeve (7), The utility model discloses a pump, including bottom plate (9), the pump body (2) is arranged above the bottom plate (9) near left side position, and the upper surface of bottom plate (9) is fixed with two support plate (1) near left side, the right end of pump body (2) inserts plunger rod (3), the upper surface of bottom plate (9) is fixed with two fixed plate (6) near right end position, two rotatingly installed crankshaft (5) between fixed plate (6), and the middle part of crankshaft (5) is sleeved with rotating sleeve (7), the right end of plunger rod (3) is connected with crankshaft (5) through connecting rod (4), the seat end of connecting rod (4) is articulated with plunger rod (3), and the right end of connecting rod (4) is articulated with rotating sleeve (7), 2. The ultra-high pressure liquid chromatography pump of claim 1, wherein: The left end of pump body (2) is fixed with first check valve (22), and the front side of pump body (2) is fixed with second check valve (23), the left end of first check valve (22) is fixed with liquid outlet pipe (21), one end of second check valve (23) is fixed with liquid inlet pipe (24), the inside of pump body (2) is provided with the pump cavity (25) of right opening.

3. The ultra-high pressure liquid chromatography pump of claim 2, wherein: The both ends of connecting column (53) are all set up with guide clamping groove (532), and the outside of connecting column (53) is correspondingly installed with locking screw (531) in the position of guide clamping groove (532) in screw thread.

4. The ultra-high pressure liquid chromatography pump of claim 3, wherein: The end part of locking screw (531) is fixed with ball head (5311), the side of swing bar (52) is set up with a plurality of lock slot (521) of cooperation with ball head (5311).

5. The ultra-high pressure liquid chromatography pump of claim 4, wherein: The width of swing bar (52) is same with the width of guide clamping groove (532), and the distance between the front and back swing bar (52) is same with the distance between the bottom of the front and back guide clamping groove (532).

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