Flow velocity adjusting device for high-pressure infusion pump of high performance liquid chromatograph

Abstract

The utility model discloses a high performance liquid chromatograph high pressure infusion pump flow speed adjusting device which comprises a chromatograph main body, the surface of the chromatograph main body is fixedly connected with a connecting plate, and the surface of the connecting plate is fixedly connected with a mounting rack. According to the flow speed adjusting device for the high-pressure infusion pump of the high performance liquid chromatograph, the belleville spring with the same maximum pressure borne by the pipeline is arranged in the fixed pipe, when the flow speed is adjusted to enable the pressure in the pipeline to be too large, the plug column extrudes the belleville spring, and the plug column slides towards the two sides in the fixed pipe; when a strip-shaped through hole in a plug column is in contact with a strip-shaped groove in a fixed rod, a mobile phase flows out from a gap, when the pressure is still increased and the plug column moves, the gap is gradually enlarged to accelerate flowing out of the mobile phase, at the moment, the pressure in the flow speed regulator is reduced, and the mobile phase flows into a collection bottle through a flow guide pipe to be conveniently recycled. And the safety protection performance of the device is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to chromatographic pump technical field, concretely is a kind of high pressure infusion pump flow rate regulating device of high performance liquid chromatograph. BACKGROUND

[0002] Liquid chromatograph is a kind of analytical instrument based on liquid chromatography technique, for separating, identifying and quantifying chemical components in complex mixture. Its core function is to realize the high-efficiency separation of different components by the interaction of mobile phase (mobile phase) and stationary phase (chromatographic column filler), and precise analysis by detector. The current liquid chromatograph, when regulating the flow rate of high pressure infusion pump, may cause excessive pressure in pipeline due to over-regulation, thereby causing pipeline rupture and damage, with certain safety hazards. SUMMARY

[0003] This section aims to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0004] In view of the above and / or existing problems in high pressure infusion pump flow rate regulating device of high performance liquid chromatograph, the utility model is proposed.

[0005] Therefore, the purpose of the utility model is to provide a kind of high pressure infusion pump flow rate regulating device of high performance liquid chromatograph, when regulating the flow rate of high pressure infusion pump, may cause excessive pressure in pipeline due to over-regulation, thereby causing pipeline rupture and damage, with certain safety hazards.

[0006] To solve the above technical problems, according to one aspect of the utility model, the utility model provides the following technical scheme:

[0007] The utility model provides a kind of high-efficiency liquid chromatograph high-pressure infusion pump flow rate regulating device, it includes: chromatograph main body, the surface fixed connection of chromatograph main body is connected with connecting plate, the surface fixed connection of connecting plate is connected with mounting bracket, flow rate regulator is installed in the inside of mounting bracket, fixed pipe is equipped in the inside of flow rate regulator, main flow pipe is fixedly connected on the top of fixed pipe, shunt pipe is fixedly connected below fixed pipe, first threaded sleeve is fixedly connected on the surface of fixed pipe, first sealing movable sleeve is connected by sliding in the inside of fixed pipe, movable tube is fixedly connected in the inside of first sealing movable sleeve, hollow hand screw bolt is connected on the surface of movable tube by bearing, first threaded sleeve is connected by thread on the surface of hollow hand screw bolt, strip slot is formed in the inside of movable tube, fixed column is fixedly connected in the inside of movable tube, butterfly spring is fixedly connected on the surface of fixed column, plug post is fixedly connected to the other end of butterfly spring, flow guide pipe is inserted in the inside of movable tube.

[0008] As a preferred scheme of the high-efficiency liquid chromatograph high-pressure infusion pump flow rate regulating device, the second threaded sleeve is fixedly connected to the top of the mounting bracket, the inlet pipe is arranged in the inside of the mounting bracket, the second movable sealing sleeve is inserted in the inside of the inlet pipe, the filter element is fixedly connected to the inside of the second movable sealing sleeve, the connecting rod is fixedly connected to the inside of the filter element, the sleeve pipe is connected to the surface of the connecting rod by the pivot, the rotating blade is fixedly connected to the surface of the sleeve pipe, the first collection shell is fixedly connected to the bottom of the sleeve pipe, the connecting ring is fixedly connected to the surface of the first collection shell, the second collection shell is fixedly connected to the top of the connecting ring, the threaded cap is fixedly connected to the top of the connecting rod, and the second threaded sleeve is connected by thread to the inside of the threaded cap.

[0009] As a preferred scheme of the high-efficiency liquid chromatograph high-pressure infusion pump flow rate regulating device, the flow guide pipe is fixedly connected to the surface of the flow guide pipe, the collection bottle is sleeved to the surface of the collection cap, the placing plate is arranged on the surface of the collection bottle, and the mounting bracket is fixedly connected to the surface of the placing plate.

[0010] As a preferred scheme of the high-efficiency liquid chromatograph high-pressure infusion pump flow rate regulating device, the sealing ring is fixedly connected to the top of the flow rate regulator, and the mounting bracket is connected to the surface of the mounting bracket by the pivot.

[0011] As a preferred scheme of the high-efficiency liquid chromatograph high-pressure infusion pump flow rate regulating device, the movable tube is fixedly connected to the surface of the movable tube, and the blocking ring is symmetrically distributed.

[0012] As a preferred scheme of the high-pressure infusion pump flow rate adjusting device of the high-performance liquid chromatograph, the pump body is connected to the installation frame surface through a connecting pipe, the pump body top is provided with a storage plate, and the pump body is connected with a liquid storage bottle through the connecting pipe.

[0013] Compared with the prior art, the utility model has the beneficial effect that: by screwing the hand screw bolt, the first sealing movable sleeve in the fixed pipe moves to the center under the thrust of the movable pipe, thereby covering the multiple shunt pipes below the fixed pipe, reducing the cross-sectional area of the mobile phase flow, thereby increasing the flow rate, the butterfly spring with the same maximum bearing pressure in the pipe is arranged in the fixed pipe, when the flow rate is adjusted and the pressure in the pipe is too large, the plug post will extrude the butterfly spring, the plug post will slide to both sides in the fixed pipe, when the strip-shaped perforation on the plug post contacts the strip-shaped groove in the fixed rod, the mobile phase will flow out of the gap, when the pressure is still increasing and the plug post moves, the gap will gradually increase, and the mobile phase flows out faster, at this time, the pressure in the flow rate regulator will decrease, flows into the collection bottle through the flow guide pipe, and is convenient to recycle, and the safety protection of the device is increased. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the utility model will be described in detail below by combining with the drawings and detailed embodiments. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor. Wherein:

[0015] Figure 1 It is the overall structure schematic view of the high-pressure infusion pump flow rate adjusting device of the high-performance liquid chromatograph of the utility model;

[0016] Figure 2 It is the sealing ring structure schematic view of the high-pressure infusion pump flow rate adjusting device of the high-performance liquid chromatograph of the utility model;

[0017] Figure 3 It is the movable pipe structure schematic view of the high-pressure infusion pump flow rate adjusting device of the high-performance liquid chromatograph of the utility model;

[0018] Figure 4 It is the front structure sectional view of the flow rate regulator of the high-pressure infusion pump flow rate adjusting device of the high-performance liquid chromatograph of the utility model;

[0019] Figure 5 It is the high-pressure infusion pump flow rate adjusting device of the high-performance liquid chromatograph of the utility model Figure 4 The enlarged view of part A;

[0020] Figure 6The utility model discloses a high -efficient liquid chromatograph high pressure infusion pump flow velocity adjusting device's first collection shell structure schematic diagram.

[0021] Marked explanation in drawing: 1, chromatograph main body;2, connecting plate;3, mounting bracket;4, flow velocity regulator;5, fixed pipe;6, first sealing movable sleeve;7, movable pipe;8, hollow hand bolt;9, first threaded sleeve;10, strip groove;11, fixed column;12, butterfly spring;13, plug column;14, flow guide pipe;15, main flow pipe;16, shunt pipe;17, liquid inlet pipe;18, second movable sealing sleeve;19, filter core;20, connecting rod;21, sleeve;22, rotary vane;23, first collection shell;24, connecting ring;25, second collection shell;26, threaded cap;27, second threaded sleeve;28, collection cover;29, collection bottle;30, placing plate;31, lock plate;32, sealing ring;33, baffle ring;34, pump body;35, storage plate;36, liquid storage bottle. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purpose, features and advantages of the utility model more apparent, obvious and easy to understand, the specific implementation of the utility model is described in detail below with reference to the drawings.

[0023] Secondly, the utility model is described in detail in combination with the schematic diagram, and when the utility model implementation is described in detail, for the convenience of description, the sectional view of the device structure will be partially enlarged without the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the utility model here. In addition, the three-dimensional spatial dimension of length, width and depth should be included in actual production.

[0024] In order to make the purpose, technical scheme and advantage of the utility model more clear, the implementation of the utility model will be described in further detail below with reference to the drawings.

[0025] The utility model provides a kind of high pressure infusion pump flow velocity adjusting device of high efficiency liquid chromatograph, by screwing hand bolt, first sealing movable sleeve in fixed pipe is moved to center under the thrust of hollow hand bolt, so that first sealing movable sleeve gradually covers multiple shunt pipes below fixed pipe, it is convenient to adjust flow velocity, make the cross-sectional area of mobile phase flow reduce, so as to increase flow velocity, and butterfly spring of pipe maximum bearing pressure is arranged in fixed pipe, when the pressure in pipe is too large when adjusting flow velocity, plug column will extrude butterfly spring under the action of internal pressure, at this time plug column will slide to both sides in fixed pipe, when strip perforation on plug column contacts strip groove in fixed rod, mobile phase will flow out from its gap, when pressure is still increasing and makes plug column move, gap will gradually increase, accelerate mobile phase to flow out, at this time the pressure in flow velocity regulator will reduce, mobile phase is in collection bottle by flow guide pipe and is recycled, increase the safety protection of the device.

[0026] As Figures 1-6 The utility model discloses a high -efficient liquid chromatograph high pressure infusion pump flow rate adjusting device, including chromatograph main body 1, the surface fixed connection of chromatograph main body 1 has connecting plate 2, the surface fixed connection of connecting plate 2 has mounting bracket 3, and the inboard mounting of mounting bracket 3 has flow rate regulator 4, and the inside fixed pipe 5 of flow rate regulator 4 is equipped with main flow pipe 15, and the fixed pipe 5 below fixed connection has shunt pipe 16, and the surface fixed connection of fixed pipe 5 has first threaded sleeve 9, and the inside sliding connection of fixed pipe 5 has first sealing movable sleeve 6, and the inboard fixed connection of first sealing movable sleeve 6 has movable tube 7, and the surface bearing connection of movable tube 7 has hollow hand screw bolt 8, and the surface threaded connection of hollow hand screw bolt 8 has first threaded sleeve 9, and the inboard of movable tube 7 is equipped with strip slot 10, and the inboard fixed connection of movable tube 7 has fixed column 11, and the surface fixed connection of fixed column 11 has butterfly spring 12, and the other end fixed connection of butterfly spring 12 has plug post 13, and the inboard of movable tube 7 inserts and has flow guide pipe 14, by screwing hand screw bolt, and first sealing movable sleeve 6 in fixed pipe 5 moves to the center under the thrust of hollow hand screw bolt 8, to make first sealing movable sleeve 6 gradually cover the multiple shunt pipe 16 below fixed pipe 5, the flow rate is conveniently adjusted, and the cross-sectional area of mobile phase flow is reduced, to increase flow rate, and the inside fixed pipe 5 is equipped with the butterfly spring 12 of pipe maximum bearing pressure, when adjusting flow rate makes the pressure in pipe too big, plug post 13 will extrude butterfly spring 12 under the action of internal pressure, when plug post 13 will slide to both sides in fixed pipe 5, when the strip perforation on plug post 13 contacts the strip slot 10 in fixed rod, mobile phase will flow from its gap, when the pressure is still increasing and makes plug post 13 move, the gap will gradually increase, and mobile phase flows out, when the pressure in the inside of flow rate regulator 4 reduces, mobile phase flows into collection bottle 29 through flow guide pipe 14 and is conveniently recycled, increase the safety protection of the device.

[0027] The top of the mounting frame 3 is fixedly connected with a second threaded sleeve 27, the inside of the mounting frame 3 is provided with a liquid inlet pipe 17, the inside of the liquid inlet pipe 17 is provided with a second movable sealing sleeve 18, the inside of the second movable sealing sleeve 18 is fixedly connected with a filter core 19, the inside of the filter core 19 is fixedly connected with a connecting rod 20, the surface of the connecting rod 20 is connected with a sleeve 21 through a rotating shaft, the surface of the sleeve 21 is fixedly connected with a rotating blade 22, the bottom of the sleeve 21 is fixedly connected with a first collecting shell 23, the surface of the first collecting shell 23 is fixedly connected with a connecting ring 24, the top of the connecting ring 24 is fixedly connected with a second collecting shell 25, the top of the connecting rod 20 is fixedly connected with a threaded cap 26, the inside of the threaded cap 26 is threadedly connected with the second threaded sleeve 27, whereby the filter core 19 is installed in the second sealing movable sleeve provided in the liquid inlet pipe 17, the sleeve 21 is provided on the connecting rod 20 fixedly connected in the filter core 19, the rotating blade 22 is provided on the sleeve 21, when the flow rate regulator 4 is adjusted to increase the flow rate of the device, the flowing phase will drive the rotating blade 22 to rotate, thereby driving the first collecting shell 23 and the second collecting shell 25 at the bottom and both sides of the sleeve 21 to rotate, at this time the scraper on the surface of the first collecting shell 23 and the second collecting shell 25 will scrape the fine particles on the inside and bottom of the filter core 19, collecting them in the collecting shells of the two, preventing the accumulation of fine particles from causing blockage, then the first collecting shell 23 and the second collecting shell 25 can be taken out and cleaned by rotating the threaded cap 26.

[0028] The surface of the flow guide pipe 14 is fixedly connected with a collecting cover 28, the collecting cover 28 is sleeved with a collecting bottle 29, the surface of the collecting bottle 29 is provided with a placing plate 30, and the surface of the placing plate 30 is fixedly connected with the mounting frame 3, so that the flowing phase flowing out of the flow guide pipe 14 can flow into the collecting bottle 29, which can be taken out for convenient recycling.

[0029] The top of the flow rate regulator 4 is fixedly connected with a sealing ring 32, and the surface of the mounting frame 3 is connected with a lock plate 31 through a rotating shaft, whereby when the flow rate regulator 4 is inserted into the mounting frame 3, the sealing ring 32 will block the gap at the connection between the liquid inlet pipe 17 and the main flow pipe 15, preventing liquid leakage, and the compressed sealing ring 32 increases the friction coefficient between the flow rate regulator 4 and the mounting frame 3 to prevent slipping, and the flow rate regulator 4 can be fixed by rotating the lock plate 31, increasing the stability of the device.

[0030] The surface of the movable pipe 7 is fixedly connected with a blocking ring 33, and the blocking ring 33 is symmetrically distributed, so that the blocking ring 33 can avoid the flow rate regulator 4 being completely closed, thereby preventing the internal pressure from suddenly increasing and damaging the instrument.

[0031] The surface of the mounting frame 3 is connected with the pump body 34 through the connecting pipe, the pump body 34 is provided with the storage plate 35 on the top, the pump body 34 is connected with the liquid storage bottle 36 through the connecting pipe, and the flow phase in the liquid storage bottle 36 can be introduced out by starting the pump body 34, and then enters the liquid chromatograph through the flow rate adjusting device, so that the manpower is saved and the convenience of the device is improved.

[0032] In combination Figures 1-6 , the specific use process of the high-pressure infusion pump flow rate adjusting device of the high-performance liquid chromatograph is as follows: by screwing the hand screw bolt, the first sealing movable sleeve in the fixed pipe moves to the center under the pushing force of the hollow hand screw bolt, so that the first sealing movable sleeve gradually covers the plurality of shunt pipes below the fixed pipe, the flow rate is adjusted, the cross-sectional area of the flow phase is reduced, the flow rate is increased, and the butterfly spring with the same maximum bearing pressure of the pipeline is arranged in the fixed pipe. When the pressure in the pipeline is too large during the flow rate adjustment, the plug column will extrude the butterfly spring under the action of the internal pressure, at this time, the plug column will slide to both sides in the fixed pipe. When the strip-shaped perforation on the plug column contacts the strip-shaped groove in the fixed rod, the flow phase will flow out of the gap, and when the pressure is still increasing to move the plug column, the gap will gradually increase to speed up the flow of the flow phase. At this time, the pressure in the flow rate adjuster will decrease, the flow phase will flow into the collection bottle through the flow guide pipe for convenient recovery, and the safety protection of the device is increased.

[0033] In the embodiment, since the flow phase may contain fine particles, the filter screen may be blocked after a long time of use, the flow phase is not in circulation, and the use is affected. Therefore, please refer to Figures 1-6 In the embodiment, the filter element is arranged in the second sealing movable sleeve in the liquid inlet pipe, the connecting rod fixed in the filter element is provided with a sleeve, and the rotating blade is arranged on the sleeve. When the flow rate of the flow rate adjuster is adjusted to increase the flow rate of the device, the rotating blade is rotated by the flow phase, so as to drive the bottom and both sides of the sleeve to rotate the first collection shell and the second collection shell. At this time, the scraper on the surface of the first collection shell and the second collection shell can scrape the fine particles on the inside and bottom of the filter element, and collect them in the collection shells inside the two, so as to prevent the accumulation of fine particles from causing blockage, and then the first collection shell and the second collection shell can be taken out and cleaned by rotating the threaded cap.

[0034] Although the utility model has been described above with reference to the embodiments, various modifications can be made thereto, and equivalent replacements can be made to the components thereof, without departing from the scope of the utility model. In particular, as long as there is no structural conflict, each feature in the embodiments disclosed by the utility model can be combined with each other in any manner, and the combinations are not exhaustively described in the specification merely for the purpose of omitting the length and saving the resources. Therefore, the utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A high pressure infusion pump flow rate adjusting device for high performance liquid chromatography, characterized in that, Include: Chromatograph main body (1), the surface of the chromatograph main body (1) is fixedly connected with the connecting plate (2), the surface of the connecting plate (2) is fixedly connected with the mounting bracket (3), the inside of the mounting bracket (3) is installed with the flow rate regulator (4), the inside of the flow rate regulator (4) is equipped with the fixed tube (5), the top of the fixed tube (5) is fixedly connected with the main flow pipe (15), the bottom of the fixed tube (5) is fixedly connected with the shunt pipe (16), the surface of the fixed tube (5) is fixedly connected with the first threaded sleeve (9), the inside of the fixed tube (5) is slidably connected with the first sealing movable sleeve (6), the inside of the first sealing movable sleeve (6) is fixedly connected with the movable tube (7), the surface of the movable tube (7) is connected with the hollow hand screw bolt (8) through the bearing, the surface of the hollow hand screw bolt (8) is connected with the first threaded sleeve (9) through the thread, the inside of the movable tube (7) is provided with the strip-shaped groove (10), the inside of the movable tube (7) is fixedly connected with the fixed column (11), the surface of the fixed column (11) is fixedly connected with the butterfly spring (12), the other end of the butterfly spring (12) is fixedly connected with the plug column (13), the inside of the movable tube (7) is inserted with the flow guide pipe (14).

2. The flow rate adjusting device of a high-pressure infusion pump of a high-performance liquid chromatograph according to claim 1, characterized in that, The top of the mounting bracket (3) is fixedly connected with the second threaded sleeve (27), the inside of the mounting bracket (3) is equipped with the liquid inlet pipe (17), the inside of the liquid inlet pipe (17) is inserted with the second movable sealing sleeve (18), the inside of the second movable sealing sleeve (18) is fixedly connected with the filter element (19), the inside of the filter element (19) is fixedly connected with the connecting rod (20), the surface of the connecting rod (20) is connected with the sleeve pipe (21) through the rotating shaft, the surface of the sleeve pipe (21) is fixedly connected with the rotating blade (22), the bottom of the sleeve pipe (21) is fixedly connected with the first collection shell (23), the surface of the first collection shell (23) is fixedly connected with the connecting ring (24), the top of the connecting ring (24) is fixedly connected with the second collection shell (25), the top of the connecting rod (20) is fixedly connected with the threaded cap (26), the inside of the threaded cap (26) is connected with the second threaded sleeve (27) through the thread.

3. The flow rate adjusting device of the high-pressure infusion pump of the high-performance liquid chromatograph according to claim 1, characterized in that, The surface of the flow guide pipe (14) is fixedly connected with the collection cover (28), the surface of the collection cover (28) is sleeved with the collection bottle (29), the surface of the collection bottle (29) is provided with the placing plate (30), and the surface of the placing plate (30) is fixedly connected with the mounting bracket (3).

4. The flow rate adjusting device of a high-pressure infusion pump of a high-performance liquid chromatograph according to claim 1, characterized in that, The top of the flow rate regulator (4) is fixedly connected with the sealing ring (32), and the surface of the mounting bracket (3) is connected with the lock plate (31) through the rotating shaft.

5. The flow rate adjusting device of the high-pressure infusion pump of the high-performance liquid chromatograph according to claim 1, characterized in that, The surface of the movable tube (7) is fixedly connected with the blocking ring (33), and the blocking ring (33) is symmetrically distributed.

6. The flow rate adjusting device of a high-pressure infusion pump of a high-performance liquid chromatograph according to claim 1, characterized in that, The surface of the mounting bracket (3) is connected with the pump body (34) through the connecting pipe, the top of the pump body (34) is provided with the storage plate (35), and the pump body (34) is connected with the liquid storage bottle (36) through the connecting pipe.

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