CN112485362A

CN112485362A - Liquid chromatograph with plunger structure

Info

Publication number: CN112485362A
Application number: CN202011489764.3A
Authority: CN
Inventors: 王成勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-03-12

Abstract

The invention discloses a liquid chromatograph with a plunger structure, which comprises a box body, a sample injector, a pump body and a chromatograph box, wherein a positioning mechanism matched with the sample injector is arranged at the top of the box body, a fixing mechanism is arranged on the left side of the inner wall of the box body, the pump body comprises a pump head and a plunger, and a sealing mechanism is arranged between the inner wall of the pump head and the surface of the plunger. This liquid chromatograph with plunger structure, set up the cavity with plunger looks adaptation through one side of pump head, the mounting groove with sealing washer looks adaptation is seted up to the inner wall of cavity, and the rear side of mounting groove is opened and is equipped with the ring channel, one side fixedly connected with spring of ring channel inner wall, be provided with the sealing washer between the cavity in plunger and pump head, and the sealing washer is under the elastic force effect of spring, make the sealing washer still can laminate mutually with the plunger after long-time the use, the life of sealing washer has been prolonged, the leakproofness is better.

Description

Liquid chromatograph with plunger structure

Technical Field

The invention relates to the technical field of liquid chromatographs, in particular to a liquid chromatograph with a plunger structure.

Background

The liquid chromatograph is an instrument which firstly separates a mixture by utilizing the difference of the distribution ratio of the mixture between two liquids which are liquid-solid or immiscible, and then analyzes and identifies the mixture, the liquid chromatograph is divided into a liquid-liquid chromatograph (LLC) and a liquid-solid chromatograph (LSC) according to whether the stationary phase is liquid or solid, the modern liquid chromatograph consists of a high-pressure infusion pump, a sample injection system, a temperature control system, a chromatographic column, a detector, a signal recording system and the like, compared with a classical liquid column chromatograph device, the liquid chromatograph has the characteristics of high efficiency, rapidness, sensitivity and the like, the system consists of a liquid storage device, a pump, a sample injector, a chromatographic column, a detector, a recorder and the like, a mobile phase in the liquid storage device is pumped into the system by a pump body, a sample solution enters the mobile phase by the sample injector and is loaded into the chromatographic column (stationary phase) by the mobile phase, and because each component in the sample, when the two phases move relatively, through repeated adsorption-desorption distribution process, the components have large difference in moving speed and are separated into single components which flow out of the column in sequence.

At present, a sealing ring is arranged at the joint of a plunger and a pump head of the liquid chromatograph, liquid suction and liquid discharge are realized under the sealing effect of the sealing ring and the check effect of a check valve, but the existing sealing ring repeatedly rubs with the plunger in the using process, the abrasion of the sealing ring is accelerated, the sealing ring loses elasticity, the service life of the sealing ring is shortened, and the sealing effect is poor.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a liquid chromatograph with a plunger structure, which solves the problems that the existing sealing ring repeatedly rubs with the plunger in the using process, the abrasion of the sealing ring is accelerated, the elasticity of the sealing ring is lost, the service life of the sealing ring is shortened, and the sealing effect is poor.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a liquid chromatograph with plunger structure, includes box, injector, the pump body and chromatograph case, the top of box is provided with the positioning mechanism with injector looks adaptation, the left side of box inner wall is provided with fixed establishment, the pump body includes pump head and plunger, be provided with sealing mechanism between the inner wall of pump head and the surface of plunger.

Sealing mechanism includes the sealing washer, the cavity with plunger looks adaptation is seted up to one side of pump head, the mounting groove with sealing washer looks adaptation is seted up to the inner wall of cavity, and the rear side of mounting groove opens and is equipped with the ring channel, one side fixedly connected with spring of ring channel inner wall, the one end fixedly connected with fixed block of ring channel inner wall is kept away from to the spring, the fixed block is kept away from one side of spring and the fixed surface fixed connection of sealing washer, the equal fixedly connected with installation pole in both sides of fixed block, and the installation pole keeps away from one side of fixed block and the inner wall swing joint of ring channel.

Preferably, the surface of sealing washer and the back swing joint of mounting groove inner wall, the right side fixedly connected with rubber circle of cavity inner wall, and the inner wall of rubber circle and the surface swing joint of plunger.

Preferably, the inlet and the liquid outlet of pump head and be located the top and the equal fixedly connected with check valve in bottom of cavity, the inlet intercommunication of pump head has the feed liquor pipe, the liquid outlet intercommunication of pump head has the drain pipe, the right side of box inner wall bottom and the bottom fixed connection of chromatograph case, the one end that the pump head was kept away from to the drain pipe is linked together with the bottom on chromatograph case right side.

Preferably, the left side at box top and the bottom swing joint of injector, the one end that the pump head was kept away from to the feed liquor pipe runs through the box and extends to the outside of box, the one end that the feed liquor pipe extended to the box outside is linked together with the top of injector.

Preferably, positioning mechanism includes two L templates, two the bottom of L template respectively with the both sides fixed connection at box top, two the equal fixedly connected with electric telescopic handle in bottom of the relative one side of L template, and the arc of the one end fixedly connected with of electric telescopic handle output shaft and sample injector looks adaptation.

Preferably, the fixing mechanism comprises an inserting rod, the top and the bottom on the left side of the pump body are fixedly connected with first installation blocks, and the top and the bottom on the left side of the inner wall of the box body are fixedly connected with second installation blocks.

Preferably, the bottom of inserted bar runs through second installation piece and first installation piece in proper order and extends to the outside of first installation piece, the inserted bar extends to the outside one end fixedly connected with threaded rod of first installation piece.

Preferably, the surface of the threaded rod is in threaded connection with a nut, and the top of the nut is movably connected with the bottom of the first mounting block.

(III) advantageous effects

The invention provides a liquid chromatograph with a plunger structure. Compared with the prior art, the method has the following beneficial effects:

(1) this liquid chromatograph with plunger structure, include the sealing washer through sealing mechanism, the cavity with plunger looks adaptation is seted up to one side of pump head, the mounting groove with sealing washer looks adaptation is seted up to the inner wall of cavity, and the rear side of mounting groove is opened and is equipped with the ring channel, one side fixedly connected with spring of ring channel inner wall, the one end fixedly connected with fixed block of ring channel inner wall is kept away from to the spring, the fixed block is kept away from one side of spring and the fixed surface fixed connection of sealing washer, the equal fixedly connected with installation pole in both sides of fixed block, and the installation pole is kept away from one side of fixed block and the inner wall swing joint of ring channel, be provided with the sealing washer between the cavity in plunger and pump head, and the sealing washer is under the spring action of spring, make the sealing washer still can laminate with the.

(2) This liquid chromatograph with plunger structure includes two L templates through positioning mechanism, the bottom of two L templates respectively with the both sides fixed connection at box top, the equal fixedly connected with electric telescopic handle in bottom of the relative one side of two L templates, and the arc of the one end fixedly connected with of electric telescopic handle output shaft and injector looks adaptation, it removes to drive the arc through electric telescopic handle, the convenience is fixed the injector of equidimension not, application scope is wide, it is safe more to stabilize in the use.

(3) The liquid chromatograph with the plunger structure comprises an inserted link through a fixing mechanism, wherein the top and the bottom of the left side of a pump body are fixedly connected with a first mounting block, the top and the bottom of the left side of the inner wall of a box body are fixedly connected with a second mounting block, the top of the first mounting block is fixedly connected with the top of the left side of the inner wall of the box body, the bottom end of the inserted link sequentially penetrates through the second mounting block and the first mounting block and extends to the outside of the first mounting block, one end of the inserted link extending to the outside of the first mounting block is fixedly connected with a threaded rod, the surface of the threaded rod is in threaded connection with a nut, the first mounting block on the pump body is connected with the second mounting block on the inner wall of the box, meanwhile, the threaded rod at the bottom of the inserted bar penetrates out of the first mounting block, the threaded rod and the inserted bar at the top of the threaded rod are fixed through the nut, the pump body is conveniently mounted and dismounted, and the operation is simple and rapid.

Drawings

FIG. 1 is a perspective view of the structure of the present invention;

FIG. 2 is a cross-sectional view of the structure of the present invention;

FIG. 3 is an enlarged view of a portion of the invention at A in FIG. 2;

FIG. 4 is a side view of the internal structure of the pump head of the present invention;

FIG. 5 is an enlarged view of a portion of the invention at B in FIG. 4;

fig. 6 is a side view of the internal structure of the annular groove of the present invention.

In the figure, 1 box, 2 sample injector, 3 pump body, 31 pump head, 32 plunger, 4 chromatograph box, 5 positioning mechanism, 51L template, 52 electric telescopic rod, 53 arc plate, 6 fixing mechanism, 61 inserted bar, 62 first mounting block, 63 second mounting block, 64 threaded rod, 65 nut, 7 sealing mechanism, 71 sealing ring, 72 cavity, 73 mounting groove, 74 annular groove, 75 spring, 76 fixing block, 77 mounting bar, 8 rubber ring, 9 one-way valve, 10 liquid inlet pipe, 11 liquid outlet pipe.

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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, an embodiment of the present invention provides a technical solution: the utility model provides a liquid chromatograph with plunger structure, includes box 1, injector 2, the pump body 3 and chromatograph case 4, and the top of box 1 is provided with the positioning mechanism 5 with injector 2 looks adaptation, and the left side of box 1 inner wall is provided with fixed establishment 6, and the pump body 3 includes pump head 31 and plunger 32, is provided with sealing mechanism 7 between the inner wall of pump head 31 and the surface of plunger 32.

In the embodiment of the invention, the sealing mechanism 7 comprises a sealing ring 71, the sealing ring 71 can be replaced, one side of the pump head 31 is provided with a cavity 72 matched with the plunger 32, the inner wall of the cavity 72 is provided with an installation groove 73 matched with the sealing ring 71, an annular groove 74 is formed in the rear side of the mounting groove 73, the mounting groove 73 is connected with the annular groove 74, a spring 75 is fixedly connected to one side of the inner wall of the annular groove 74, the spring 75 can be replaced to ensure elasticity, a fixing block 76 is fixedly connected to one end, far away from the inner wall of the annular groove 74, of the spring 75, one side, far away from the spring 75, of the fixing block 76 is fixedly connected with the outer surface of the sealing ring 71, mounting rods 77 are fixedly connected to two sides of the fixing block 76, the mounting rods 77 move in the annular groove 74 along with the movement of the mounting rods 77, and the, and the side of the mounting rod 77 away from the fixing block 76 is movably connected with the inner wall of the annular groove 74.

In the embodiment of the invention, the outer surface of the sealing ring 71 is movably connected with the back surface of the inner wall of the mounting groove 73, the right side of the inner wall of the cavity 72 is fixedly connected with the rubber ring 8, the rubber ring 8 can be replaced, and the inner wall of the rubber ring 8 is movably connected with the outer surface of the plunger 32.

In the embodiment of the invention, the liquid inlet and the liquid outlet of the pump head 31, the top and the bottom of the cavity 72 are both fixedly connected with the one-way valve 9, the liquid inlet of the pump head 31 is communicated with the liquid inlet pipe 10, the liquid outlet of the pump head 31 is communicated with the liquid outlet pipe 11, the right side of the bottom of the inner wall of the box body 1 is fixedly connected with the bottom of the chromatograph box 4, and one end of the liquid outlet pipe 11, which is far away from the pump head 31, is communicated with the bottom.

In the embodiment of the invention, the left side of the top of the box body 1 is movably connected with the bottom of the sample injector 2, one end of the liquid inlet pipe 10, which is far away from the pump head 31, penetrates through the box body 1 and extends to the outside of the box body 1, and one end of the liquid inlet pipe 10, which extends to the outside of the box body 1, is communicated with the top of the sample injector 2.

In the embodiment of the invention, the positioning mechanism 5 comprises two L-shaped plates 51, the bottoms of the two L-shaped plates 51 are respectively and fixedly connected with two sides of the top of the box body 1, the bottoms of the opposite sides of the two L-shaped plates 51 are respectively and fixedly connected with the electric telescopic rods 52, the electric telescopic rods 52 are controlled by an external switch and are connected with an external power supply through wires, one end of the output shaft of the electric telescopic rods 52 is fixedly connected with an arc-shaped plate 53 matched with the sample injector 2, and the positioning mechanism 5 is arranged, so that the sample injectors 2 with different sizes can be conveniently fixed, and the application range is wide.

In the embodiment of the present invention, the fixing mechanism 6 includes an insertion rod 61, the top and the bottom of the left side of the pump body 3 are both fixedly connected with a first mounting block 62, and the top and the bottom of the left side of the inner wall of the box body 1 and the top of the first mounting block 62 are both fixedly connected with a second mounting block 63.

In the embodiment of the invention, the bottom end of the insertion rod 61 sequentially penetrates through the second mounting block 63 and the first mounting block 62 and extends to the outside of the first mounting block 62, and a threaded rod 64 is fixedly connected to one end of the insertion rod 61 extending to the outside of the first mounting block 62.

In the embodiment of the present invention, the surface of the threaded rod 64 is connected with the nut 65 by a thread, the fixing mechanism 6 is arranged, so that the pump body 3 can be conveniently mounted and dismounted, the operation is simple and quick, the top of the nut 65 is movably connected with the bottom of the first mounting block 62, and the specific structure and the working principle of the device, and the specific structure and the connection mode of the pump body 3, the pump head 31 and the plunger 32 are the same as those of the prior art or can be realized by the prior art, which are not described herein again.

When the sample injector works, the sample injector 2 is placed between the two arc plates 53 on the box body 1, the electric telescopic rod 52 is started to drive the two arc plates 53 to move towards opposite directions, so that the arc plates 53 fix the sample injector 2, the sealing ring 71 is arranged between the cavity 72 of the pump head 31 and the plunger 32 to seal the cavity 72 of the pump head 31 and the plunger 32, liquid suction and liquid discharge are realized under the sealing action of the sealing ring 71 and the non-return action of the one-way valve 9, meanwhile, the sealing ring 71 presses the fixed block 76 in the annular groove 74 during installation, the fixed block 76 presses the spring 75, under the reaction force of the spring 75, the sealing ring 71 is connected with the plunger 32 more tightly, the sealing performance is better, the installation rod 77 moves in the annular groove 74 while the fixed block 76 moves, the moving stability of the fixed block 76 and the spring 75 is improved, and the rubber ring 8 is arranged in front of the cavity 72, prevent that outside dust impurity from getting into cavity 72, when installing the pump body 3, be connected first installation piece 62 on the pump body 3 with second installation piece 63 on the box 1 inner wall, pass second installation piece 63 and first installation piece 62 with inserted bar 61, first installation piece 62 is worn out to the threaded rod 64 of inserted bar 61 bottom, then tighten nut 65 on threaded rod 64, fix threaded rod 64 and the inserted bar 61 at top, can fix first installation piece 62 and second installation piece 63, accomplish the installation to pump body 3, when dismantling, screw rod 64 is twisted out with nut 65, it can to take first installation piece 62 and second installation piece 63 out with inserted bar 61.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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 liquid chromatograph with plunger structure, includes box (1), injector (2), pump body (3) and chromatograph case (4), its characterized in that: the sample injector is characterized in that a positioning mechanism (5) matched with the sample injector (2) is arranged at the top of the box body (1), a fixing mechanism (6) is arranged on the left side of the inner wall of the box body (1), the pump body (3) comprises a pump head (31) and a plunger (32), and a sealing mechanism (7) is arranged between the inner wall of the pump head (31) and the surface of the plunger (32);

sealing mechanism (7) include sealing washer (71), cavity (72) with plunger (32) looks adaptation is seted up to one side of pump head (31), mounting groove (73) with sealing washer (71) looks adaptation is seted up to the inner wall of cavity (72), and the rear side of mounting groove (73) is opened and is equipped with ring channel (74), one side fixedly connected with spring (75) of ring channel (74) inner wall, the one end fixedly connected with fixed block (76) of ring channel (74) inner wall is kept away from in spring (75), one side that spring (75) were kept away from in fixed block (76) and the outer fixed surface of sealing washer (71) are connected, the equal fixedly connected with installation pole (77) in both sides of fixed block (76), and installation pole (77) keep away from one side of fixed block (76) and the inner wall swing joint of ring channel (74).

2. A liquid chromatograph having a plunger structure according to claim 1, wherein: the surface of sealing washer (71) and the back swing joint of mounting groove (73) inner wall, the right side fixedly connected with rubber circle (8) of cavity (72) inner wall, and the surface swing joint of the inner wall of rubber circle (8) and plunger (32).

3. A liquid chromatograph having a plunger structure according to claim 1, wherein: the utility model discloses a chromatograph box, including box (1), liquid inlet and liquid outlet, the inlet and the liquid outlet of pump head (31) just are located the top and the equal fixedly connected with check valve (9) in bottom of cavity (72), the inlet intercommunication of pump head (31) has feed liquor pipe (10), the liquid outlet intercommunication of pump head (31) has drain pipe (11), the right side of box (1) inner wall bottom and the bottom fixed connection of chromatograph box (4), the one end that pump head (31) were kept away from in drain pipe (11) is linked together with the bottom on chromatograph box (4) right side.

4. A liquid chromatograph having a plunger structure according to claim 1, wherein: the left side at box (1) top and the bottom swing joint of injector (2), the one end that pump head (31) were kept away from in feed liquor pipe (10) runs through box (1) and extends to the outside of box (1), feed liquor pipe (10) extend to the outside one end of box (1) and the top of injector (2) is linked together.

5. A liquid chromatograph having a plunger structure according to claim 1, wherein: positioning mechanism (5) include two L templates (51), two the bottom of L template (51) respectively with the both sides fixed connection at box (1) top, two the equal fixedly connected with electric telescopic handle (52) in bottom of the relative one side of L template (51), and the one end fixedly connected with of electric telescopic handle (52) output shaft and the arc (53) of injector (2) looks adaptation.

6. A liquid chromatograph having a plunger structure according to claim 1, wherein: fixed establishment (6) are including inserted bar (61), the first installation piece (62) of the equal fixedly connected with in the left top of pump body (3) and bottom, box (1) inner wall left top and bottom just are located the top fixedly connected with second installation piece (63) of first installation piece (62).

7. A liquid chromatograph having a plunger structure according to claim 1, wherein: the bottom of inserted bar (61) runs through second installation piece (63) and first installation piece (62) in proper order and extends to the outside of first installation piece (62), inserted bar (61) extend to the outside one end fixedly connected with threaded rod (64) of first installation piece (62).

8. A liquid chromatograph having a plunger structure according to claim 7, wherein: the surface of the threaded rod (64) is in threaded connection with a nut (65), and the top of the nut (65) is movably connected with the bottom of the first mounting block (62).