Automatic sample injector of fluid chromatography system

Abstract

The utility model discloses an automatic sample injector of a fluid chromatography system, which comprises a cylinder body, the right end of the cylinder body is fixedly connected with a liquid discharge pipe, the left end of the cylinder body is fixedly connected with a communicating pipe, the upper end of the communicating pipe is fixedly connected with a fixed pipe, the top of the cylinder body is fixedly connected with a hydraulic cylinder, and the top of the cylinder body is fixedly connected with a liquid discharge pipe. The output end of the hydraulic cylinder is slidably connected with the barrel, the lower end of the output end of the hydraulic cylinder is fixedly connected with a pressing rod, the lower end of the pressing rod is fixedly connected with a pressing plate, a conveying mechanism is arranged on the liquid discharging pipe, and a supplementing mechanism is arranged on the communicating pipe. Through the design of the hydraulic cylinder, the output end of the hydraulic cylinder can drive the pressing plate and the sealing ring to move downwards, samples in the barrel body can be extruded and input into the liquid discharging pipe, the baffle can be pushed to move rightwards to be separated from the liquid discharging pipe to achieve automatic sample feeding work, the baffle cannot move leftwards, and the situation that follow-up detection work is affected by backflow of the samples can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to automatic sampler technical field, concretely is a kind of automatic sampler of fluid chromatography system. BACKGROUND

[0002] Fluid chromatography system is a kind of instrument for separating, detecting and quantitative analysis component in mixture. The automatic sampler of fluid chromatography system is a kind of equipment for automatically introducing sample into chromatography system for analysis. Automatic sampler can improve analysis efficiency, reduce manual operation, reduce sample waste, and can maintain consistent sample injection amount and time when continuously analyzing a large number of samples.

[0003] The current automatic sampler, if backflow occurs during sample delivery, will affect subsequent detection and analysis work. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of automatic sampler of fluid chromatography system, solve the problem that backflow in sample delivery will affect subsequent detection and analysis work.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of automatic sampler of fluid chromatography system, including cylinder, the right end of the cylinder is fixedly connected with drain pipe, the left end of the cylinder is fixedly connected with communicating pipe, the upper end of the communicating pipe is fixedly connected with fixed pipe, the top of the cylinder is fixedly connected with hydraulic cylinder, the output of the hydraulic cylinder is slidably connected with cylinder, the lower end of the output of the hydraulic cylinder is fixedly connected with pressure rod, the lower end of the pressure rod is fixedly connected with pressure plate, conveying mechanism is provided on the drain pipe, and the communicating pipe is provided with replenishment mechanism.

[0006] Preferably, the outer side of the pressure plate is fixedly sleeved with sealing ring, and the sealing ring is slidably connected with the cylinder. By designing sealing ring, sample flow into the upper end of pressure plate can be avoided.

[0007] Preferably, the conveying mechanism includes sealing sleeve, the inside of the drain pipe is slidably sleeved with sealing sleeve, the inside of the sealing sleeve is fixedly sleeved with baffle, the left end of the baffle is fixedly connected with connecting rod, the outer side of the connecting rod is slidably sleeved with fixed strip, the fixed strip is fixedly connected with drain pipe, the left end of the connecting rod is fixedly connected with connecting strip, the connecting strip is slidably connected with drain pipe, the right end of the connecting strip is fixedly connected with connecting rod, the outer side of the connecting rod is slidably sleeved with connecting sleeve, the connecting sleeve is fixedly connected with fixed strip, and the inside of the connecting sleeve is provided with first spring. By designing conveying mechanism, automatic delivery of sample can be realized.

[0008] Preferably, an inner part of the fixed strip is provided with a through groove, and a connecting rod is slidably connected in the through groove. The through groove enables the connecting rod to slide relative to the fixed strip.

[0009] Preferably, one end of the first spring is fixedly connected with the connecting sleeve, and the other end of the first spring is fixedly connected with the connecting rod. The first spring enables the force of the first spring to act on the connecting rod.

[0010] Preferably, the supplement mechanism comprises a feeding opening, the top of the fixed pipe is fixedly connected with the feeding opening, the upper end of the feeding opening is threadedly connected with a cover plate, the lower end of the fixed pipe is fixedly connected with a discharging opening, the discharging opening is provided with an electromagnetic valve, the inner part of the communicating pipe is fixedly connected with a contact switch, the inner part of the communicating pipe is fixedly connected with a guide rod, the outer side of the guide rod is slidably sleeved with a guide block, and the outer side of the guide block is fixedly connected with a floating ball. The supplement mechanism can automatically supplement the sample.

[0011] Preferably, the inner part of the guide block is provided with a guide groove, and the guide groove is slidably connected with the guide rod. The guide groove enables the guide block to slide along the guide rod.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] 1. The utility model discloses a hydraulic cylinder, and the output end of the hydraulic cylinder can drive the pressing plate and the sealing ring to move downwards, can extrude the sample in the barrel body into the drain pipe, can drive the baffle to move rightwards and separate from the drain pipe to realize automatic sampling work, and the baffle cannot move leftwards, so that the backflow of the sample can be avoided to affect the subsequent detection work.

[0014] 2. The utility model discloses a communicating pipe, and the communicating pipe and the barrel body are communicated to supply liquid to the barrel body, when the liquid level in the drain pipe is lowered, the floating ball moves downwards, the floating ball contacts the contact switch, the electromagnetic valve is opened, the detection liquid in the fixed pipe is input into the communicating pipe through the discharging opening to supplement the detection liquid in the barrel body, and the influence of the sample on the subsequent detection caused by the untimely supplement of the sample can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the overall structure perspective drawing of the utility model;

[0016] Figure 2 It is the barrel body partial structure perspective sectional view of the utility model; Figure 1

[0017] Figure 3 It is the drain pipe front view sectional view of the utility model; Figure 1

[0018] Figure 4 It is the utility model​​Figure 1 A front sectional view of the fixed tube.

[0019] In the diagram: 1. Cylinder; 2. Drain pipe; 3. Connecting pipe; 4. Fixed pipe; 5. Hydraulic cylinder; 6. Pressure rod; 7. Pressure plate; 8. Conveying mechanism; 9. Replenishing mechanism; 10. Sealing ring; 81. Sealing sleeve; 82. Baffle; 83. Connecting rod; 84. Fixing strip; 85. Through groove; 86. Connecting strip; 87. Connecting rod; 88. Connecting sleeve; 89. First spring; 91. Feed port; 92. Cover plate; 93. Discharge port; 94. Solenoid valve; 95. Contact switch; 96. Guide rod; 97. Guide block; 98. Guide groove; 99. Float. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1 , Figure 2 An autosampler for a fluid chromatography system includes a cylinder 1. A drain pipe 2 is fixedly connected to the right end of the cylinder 1, and a connecting pipe 3 is fixedly connected to the left end of the cylinder 1. A fixing pipe 4 is fixedly connected to the upper end of the connecting pipe 3. A hydraulic cylinder 5 is fixedly connected to the top of the cylinder 1. The output end of the hydraulic cylinder 5 is slidably connected to the cylinder 1. A pressure rod 6 is fixedly connected to the lower end of the output end of the hydraulic cylinder 5. A pressure plate 7 is fixedly connected to the lower end of the pressure rod 6. A sealing ring 10 is fixedly sleeved on the outside of the pressure plate 7. The sealing ring 10 is slidably connected to the cylinder 1. By designing the sealing ring 10, the sample can be prevented from flowing into the upper end of the pressure plate 7. A conveying mechanism 8 is provided on the drain pipe 2, and a replenishment mechanism 9 is provided on the connecting pipe 3.

[0022] Please see Figure 1 , Figure 3The conveying mechanism 8 comprises a sealing sleeve 81, the sealing sleeve 81 is sleeved on the inside of the drainage pipe 2, a baffle 82 is fixedly sleeved on the inside of the sealing sleeve 81, a connecting rod 83 is fixedly connected to the left end of the baffle 82, a fixed strip 84 is sleeved on the outside of the connecting rod 83 in a sliding mode, a through groove 85 is formed in the inside of the fixed strip 84, the connecting rod 83 is connected to the inside of the through groove 85 in a sliding mode, the connecting rod 83 can slide relative to the fixed strip 84 by designing the through groove 85, the fixed strip 84 is fixedly connected to the drainage pipe 2, a connecting strip 86 is fixedly connected to the left end of the connecting rod 83, the connecting strip 86 is connected to the drainage pipe 2 in a sliding mode, a connecting rod 87 is fixedly connected to the right end of the connecting strip 86, a connecting sleeve 88 is sleeved on the outside of the connecting rod 87 in a sliding mode, the connecting sleeve 88 is fixedly connected to the fixed strip 84, a first spring 89 is arranged in the inside of the connecting sleeve 88, one end of the first spring 89 is fixedly connected to the connecting sleeve 88, the other end of the first spring 89 is fixedly connected to the connecting rod 87, the force of the first spring 89 can act on the connecting rod 87 by designing the first spring 89, and the automatic conveying of the sample can be realized by designing the conveying mechanism 8.

[0023] Please refer to Figure 1 、 Figure 4 The supplement mechanism 9 comprises a feeding opening 91, the feeding opening 91 is fixedly connected to the top of the fixed pipe 4, a cover plate 92 is connected to the upper end of the feeding opening 91 in a threaded mode, a discharging opening 93 is fixedly connected to the lower end of the fixed pipe 4, an electromagnetic valve 94 is arranged on the discharging opening 93, a contact switch 95 is fixedly connected to the inside of the communication pipe 3, a guide rod 96 is fixedly connected to the inside of the communication pipe 3, a guide block 97 is sleeved on the outside of the guide rod 96 in a sliding mode, a guide groove 98 is formed in the inside of the guide block 97, the guide rod 96 is connected to the inside of the guide groove 98 in a sliding mode, the guide block 97 can slide along the guide rod 96 by designing the guide groove 98, a floating ball 99 is fixedly connected to the outside of the guide block 97, and the sample can be automatically supplemented by designing the supplement mechanism 9.

[0024] The specific implementation process of the utility model is as follows: in use, through the action of the hydraulic cylinder 5, the output end of the hydraulic cylinder 5 can drive the pressing plate 7 and the sealing ring 10 to move downwards, the sample in the barrel body 1 can be extruded and input into the inside of the drainage pipe 2, the liquid can push the baffle 82 to move rightwards, the baffle 82 drives the sealing sleeve 81 to move rightwards, the baffle 82 drives the connecting rod 83 to move rightwards, the connecting rod 83 drives the connecting rod 87 to slide along the connecting sleeve 88 and extrude the first spring 89, at this moment, the sealing sleeve 81 is separated from the drainage pipe 2, and then the output of the sample can be carried out, after the output is completed, the pressing plate 7 and the sealing ring 10 are reset, at this moment, the baffle 82 is reset under the elastic action of the first spring 89, and the baffle 82 cannot move leftwards, so that the backflow of the sample can be avoided to affect the subsequent detection work.

[0025] Through the effect of the communication pipe 3, the communication pipe 3 communicates with the cylinder body 1 to supply liquid to the inside of the cylinder body 1, when the liquid level in the drainage pipe 2 is lowered, the floating ball 99 will move downwards, and the floating ball 99 can contact the contact switch 95, at this time, the electromagnetic valve 94 is opened, the detection liquid in the fixed pipe 4 can be input into the communication pipe 3 through the discharge port 93 to supplement the detection liquid in the cylinder body 1, so that the sample is not supplemented in time to avoid the influence on the subsequent detection.

[0026] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An autosampler for a fluid chromatography system comprising a barrel (1), characterised in that: The right end of the barrel (1) is fixedly connected with a drainage pipe (2), the left end of the barrel (1) is fixedly connected with a communication pipe (3), the upper end of the communication pipe (3) is fixedly connected with a fixed pipe (4), the top of the barrel (1) is fixedly connected with a hydraulic cylinder (5), the output end of the hydraulic cylinder (5) is slidably connected with the barrel (1), the lower end of the output end of the hydraulic cylinder (5) is fixedly connected with a pressure rod (6), the lower end of the pressure rod (6) is fixedly connected with a pressure plate (7), the drainage pipe (2) is provided with a conveying mechanism (8), and the communication pipe (3) is provided with a supplement mechanism (9).

2. An autosampler for a fluid chromatography system according to claim 1, characterized in that: The outer side of the pressure plate (7) is fixedly sleeved with a sealing ring (10), and the sealing ring (10) is slidably connected with the barrel (1).

3. An autosampler for a fluid chromatography system as defined in claim 1, wherein: The conveying mechanism (8) comprises a sealing sleeve (81), the inside of the drainage pipe (2) is slidably sleeved with the sealing sleeve (81), the inside of the sealing sleeve (81) is fixedly sleeved with a baffle (82), the left end of the baffle (82) is fixedly connected with a connecting rod (83), the outer side of the connecting rod (83) is slidably sleeved with a fixed strip (84), the fixed strip (84) is fixedly connected with the drainage pipe (2), the left end of the connecting rod (83) is fixedly connected with a connecting strip (86), the connecting strip (86) is slidably connected with the drainage pipe (2), the right end of the connecting strip (86) is fixedly connected with a connecting rod (87), the outer side of the connecting rod (87) is slidably sleeved with a connecting sleeve (88), the connecting sleeve (88) is fixedly connected with the fixed strip (84), and the inside of the connecting sleeve (88) is provided with a first spring (89).

4. An autosampler for a fluid chromatography system as defined in claim 3, characterized in that: The inside of the fixed strip (84) is provided with a through groove (85), and the inside of the through groove (85) is slidably connected with the connecting rod (83).

5. An autosampler for a fluid chromatography system as defined in claim 3, wherein: One end of the first spring (89) is fixedly connected with the connecting sleeve (88), and the other end of the first spring (89) is fixedly connected with the connecting rod (87).

6. An autosampler for a fluid chromatography system as defined in claim 1, wherein: The supplement mechanism (9) comprises a feeding port (91), the top of the fixed pipe (4) is fixedly connected with the feeding port (91), the upper end of the feeding port (91) is threadedly connected with a cover plate (92), the lower end of the fixed pipe (4) is fixedly connected with a discharging port (93), the discharging port (93) is provided with an electromagnetic valve (94), the inside of the communication pipe (3) is fixedly connected with a contact switch (95), the inside of the communication pipe (3) is fixedly connected with a guide rod (96), the outer side of the guide rod (96) is slidably sleeved with a guide block (97), and the outer side of the guide block (97) is fixedly connected with a floating ball (99).

7. An autosampler for a fluid chromatography system according to claim 6, wherein: The inside of the guide block (97) is provided with a guide groove (98), and the inside of the guide groove (98) is slidably connected with the guide rod (96).

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