Chromatograph self-supplementing liquid supply device

Abstract

The utility model provides a chromatographic instrument self-supplementing liquid supply device which comprises a microprocessor, a liquid supply box, a storage rack arranged on the outer wall of the liquid supply box and a plurality of closed liquid supply bottles placed on the storage rack, and liquid storage compartments are arranged in the liquid supply box and correspond to the closed liquid supply bottles respectively. The liquid storage compartments are communicated with the corresponding closed liquid supply bottles through liquid supplementing pipelines, the liquid inlet ends of the liquid supplementing pipelines extend into the bottoms of the liquid storage compartments, the liquid outlet ends of the liquid supplementing pipelines extend into the tops of the closed liquid supply bottles, and the closed liquid supply bottles are further provided with liquid supply pipes used for being connected with liquid inlet pipes of chromatographic instruments; a first liquid level sensor is arranged in the closed liquid supply bottle, a liquid supplementing electromagnetic valve is arranged on the liquid supplementing pipeline, and the microprocessor controls the liquid supplementing electromagnetic valve to be opened and closed according to whether liquid level information monitored by the first liquid level sensor exceeds a threshold value or not. And the liquid in the liquid storage compartment is pressed into the closed liquid supply bottle by utilizing the air pressure difference.

Description

Technical Field

[0001] The utility model relates to a liquid supply device for an analytical instrument, specifically to a self-supplementary liquid supply device for a chromatograph. Background Art

[0002] When performing analysis, a liquid chromatograph needs to use analytical liquid and flushing liquid. The existing liquid supply method is to place bottles filled with various solutions beside the chromatograph, and the liquid inlet pipe of the chromatograph is inserted into each liquid supply bottle. During continuous analysis, the staff needs to pay attention to checking the solution content in the bottles. When the solution in a bottle is almost used up, the work needs to be paused, and after replacing the solution in the new bottle, the analysis can continue. This operation method is relatively cumbersome and affects the analysis efficiency; especially when doing overnight queuing analysis, the staff generally needs to replace the solution in the new bottle before getting off work. If they forget to replace it, it is easy to cause the instrument to stop in the middle of the night, affecting the work arrangement for the next day.

[0003] In order to solve the above existing problems, people have been seeking an ideal technical solution. Summary of the Invention

[0004] The purpose of the utility model is to aim at the deficiencies of the existing technology, and thus provide a self-supplementary liquid supply device for a chromatograph that can automatically supplement the solution into the bottle, thereby reducing the liquid replacement frequency, improving the analysis efficiency, and having strong practicability.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is: a self-supplementary liquid supply device for a chromatograph, including a microprocessor, a liquid supply tank, a storage rack arranged on the outer wall of the liquid supply tank, and a plurality of sealed liquid supply bottles placed on the storage rack. A liquid storage compartment is respectively arranged in the liquid supply tank corresponding to each sealed liquid supply bottle. The liquid storage compartment is communicated with the corresponding sealed liquid supply bottle through a liquid replenishment pipeline. The liquid inlet end of the liquid replenishment pipeline extends into the bottom of the liquid storage compartment, and the liquid outlet end extends into the top of the sealed liquid supply bottle. A liquid supply pipe for connecting the liquid inlet pipe of the chromatograph is further installed on the sealed liquid supply bottle. A first liquid level sensor is arranged in the sealed liquid supply bottle, and a liquid replenishment solenoid valve is arranged on the liquid replenishment pipeline. The microprocessor controls the opening and closing of the liquid replenishment solenoid valve according to whether the liquid level information monitored by the first liquid level sensor exceeds a threshold value, and uses the air pressure difference to press the liquid in the liquid storage compartment into the sealed liquid supply bottle.

[0006] Based on the above, it further includes an alarm and a second liquid level sensor arranged in each liquid storage compartment. The microprocessor controls the alarm to give an alarm according to whether the liquid level information monitored by the second liquid level sensor exceeds a threshold value.

[0007] Based on the above, each of the liquid storage compartments includes a liquid storage tank with an open top and a top cover. A sealing gasket is provided at the bottom of the top cover corresponding to the open top of the liquid storage tank. An air release solenoid valve is also provided on the top cover, and the microprocessor controls the synchronous opening and closing of the liquid replenishment solenoid valve and the air release solenoid valve.

[0008] Based on the above, the liquid replenishment pipeline includes an inlet section, an intermediate section, and an outlet section. The inlet section passes through the top of the liquid storage compartment and is fixedly connected. The outlet section passes through the top of the sealed liquid supply bottle and is fixedly connected. Both ends of the intermediate section are connected to the top end of the inlet section and the top end of the outlet section respectively, and the liquid replenishment solenoid valve is provided on the intermediate section.

[0009] Based on the above, the sealed liquid supply bottle includes a bottle body and a bottle cap, and both the outlet section and the liquid supply pipe are fixed on the bottle cap.

[0010] The present utility model has substantial features and progress compared with the prior art. Specifically, the present utility model has the following advantages:

[0011] (1) By providing the liquid storage compartment in the liquid supply tank, more solution can be stored at one time. The liquid supply pipe on the sealed liquid supply bottle is used to connect to the liquid inlet pipe of the chromatograph. As the solution is consumed, the air pressure in the sealed liquid supply bottle drops. When the first liquid level sensor detects that the solution in the sealed liquid supply bottle is almost used up, the microprocessor controls the liquid replenishment solenoid valve to open. Under the action of atmospheric pressure, the solution in the liquid storage compartment is pressed into the sealed liquid supply bottle to complete automatic liquid replenishment, thereby reducing the liquid replacement frequency.

[0012] (2) By providing the second liquid level sensor, the liquid level in the liquid storage compartment can be monitored, and the setting of the alarm can remind the staff to replenish the liquid in time.

[0013] (3) The top cover is sealed at the open top of the liquid storage tank through the sealing gasket. On the one hand, it can prevent the evaporation of the solution, and on the other hand, it can prevent dust in the air from falling into the solution and causing pollution. The setting of the air release solenoid valve can ensure the connection between the liquid storage compartment and the atmosphere during liquid replenishment. Description of the Drawings

[0014] Figure 1 is a cross-sectional view of the chromatograph self-supplementary liquid supply device in the present utility model.

[0015] Figure 2 is a top view of the chromatograph self-supplementary liquid supply device in the present utility model.

[0016] Figure 3 is a control principle block diagram of the microprocessor in the present utility model.

[0017] In the figure: 1. Liquid supply tank; 2. Shelf; 3. Sealed liquid supply bottle; 4. Liquid storage compartment; 5. Liquid replenishment pipeline; 6. Liquid supply pipe; 7. First liquid level sensor; 8. Liquid replenishment solenoid valve; 9. Alarm; 10. Second liquid level sensor; 11. Air release solenoid valve; 31. Bottle body; 32. Bottle cap; 41. Liquid storage tank; 42. Top cover; 43. Sealing gasket; 51. Liquid inlet section; 52. Intermediate section; 53. Liquid outlet section. Detailed implementation manner

[0018] The technical solution of the present utility model will be further described in detail below through specific implementation manners.

[0019] As Figures 1-3 shown, a self-supplementary liquid supply device for a chromatograph includes a microprocessor, a liquid supply tank 1, a shelf 2 provided on the outer wall of the liquid supply tank 1, and four sealed liquid supply bottles 3 placed on the shelf 2. A liquid storage compartment 4 is respectively provided in the liquid supply tank 1 corresponding to each sealed liquid supply bottle 3. The liquid storage compartment 4 is communicated with the corresponding sealed liquid supply bottle 3 through a liquid replenishment pipeline 5. The liquid inlet end of the liquid replenishment pipeline 5 extends into the bottom of the liquid storage compartment 4, and the liquid outlet end extends into the top of the sealed liquid supply bottle 3. A liquid supply pipe 6 for connecting the liquid inlet pipe of the chromatograph is further installed on the sealed liquid supply bottle 3. A first liquid level sensor 7 is provided in the sealed liquid supply bottle 3, and a liquid replenishment solenoid valve 8 is provided on the liquid replenishment pipeline 5. The microprocessor controls the opening and closing of the liquid replenishment solenoid valve 8 according to whether the liquid level information monitored by the first liquid level sensor 7 exceeds a threshold value, and uses the air pressure difference to press the liquid in the liquid storage compartment 4 into the sealed liquid supply bottle 3. Among them, the microprocessor can specifically adopt an STM32 single-chip microcomputer.

[0020] During specific use, the required solution needs to be poured into each liquid storage compartment 4. The liquid supply pipe 6 on the sealed liquid supply bottle 3 is connected to the liquid inlet pipe of the chromatograph. During continuous analysis, as the solution is consumed, the air pressure in the sealed liquid supply bottle 3 drops. When the first liquid level sensor 7 detects that the solution in the sealed liquid supply bottle 3 is almost used up, the microprocessor controls the liquid replenishment solenoid valve 8 to open (at this time, the liquid storage compartment 4 should be kept in communication with the atmosphere). Under the action of the atmospheric pressure, the solution in the liquid storage compartment 4 is pressed into the sealed liquid supply bottle 3. After being filled, the microprocessor controls the liquid replenishment solenoid valve 8 to close again to complete automatic liquid replenishment.

[0021] In order to facilitate monitoring the liquid level situation in the liquid storage compartment 4, the self-supplementary liquid supply device for the chromatograph further includes an alarm 9 and a second liquid level sensor 10 provided in each liquid storage compartment 4. The microprocessor controls the alarm 9 to give an alarm according to whether the liquid level information monitored by the second liquid level sensor 9 exceeds a threshold value, so as to remind the staff to replenish the liquid.

[0022] Each of the liquid storage compartments 4 includes a liquid storage tank 41 with an open top and a top cover 42. After opening the top cover 42, the solution can be replenished. To prevent the solution from evaporating, a sealing gasket 43 is provided at the bottom of the top cover 42 corresponding to the open top of the liquid storage tank 41 to ensure the sealing performance. An air release solenoid valve 11 is also provided on the top cover 42. The microprocessor controls the synchronous opening and closing of the liquid replenishment solenoid valve 8 and the air release solenoid valve 11 to ensure that when replenishing the liquid, the liquid storage compartment 4 is in communication with the atmosphere.

[0023] For the convenience of disassembly and assembly, the liquid replenishment pipeline 5 includes an inlet section 51, an intermediate section 52, and an outlet section 53. The inlet section 51 passes through the top cover 42 and is fixedly connected. The outlet section 53 passes through the top of the sealed liquid supply bottle 3 and is fixedly connected. The two ends of the intermediate section 52 are respectively connected to the top end of the inlet section 51 and the top end of the outlet section 53. The inlet section 51 and the outlet section 53 can specifically adopt rigid pipes, and the intermediate section 52 can specifically adopt a flexible pipe. The liquid replenishment solenoid valve 8 is provided on the intermediate section 52. The sealed liquid supply bottle 3 includes a bottle body 31 and a bottle cap 32. The outlet section 53 and the liquid supply pipe 6 are both fixed on the bottle cap 32.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that it is still possible to modify the specific implementation manners of the present invention or perform equivalent replacements for some technical features. Without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. A self-supplementary liquid supply device for a chromatograph, characterized in that: It includes a microprocessor, a liquid supply tank, a storage rack arranged on the outer wall of the liquid supply tank, and a plurality of sealed liquid supply bottles placed on the storage rack. A liquid storage compartment is respectively arranged in the liquid supply tank corresponding to each sealed liquid supply bottle. The liquid storage compartment is communicated with the corresponding sealed liquid supply bottle through a liquid replenishment pipeline. The liquid inlet end of the liquid replenishment pipeline extends into the bottom of the liquid storage compartment, and the liquid outlet end extends into the top of the sealed liquid supply bottle. A liquid supply pipe for connecting the liquid inlet pipe of the chromatograph is also installed on the sealed liquid supply bottle. A first liquid level sensor is arranged in the sealed liquid supply bottle. A liquid replenishment solenoid valve is arranged on the liquid replenishment pipeline. The microprocessor controls the opening and closing of the liquid replenishment solenoid valve according to whether the liquid level information monitored by the first liquid level sensor exceeds a threshold value, and uses the air pressure difference to press the liquid in the liquid storage compartment into the sealed liquid supply bottle.

2. The self-supplementary liquid supply device for a chromatograph according to claim 1, wherein: It further includes an alarm and a second liquid level sensor arranged in each liquid storage compartment. The microprocessor controls the alarm to give an alarm according to whether the liquid level information monitored by the second liquid level sensor exceeds a threshold value.

3. The self-supplementary liquid supply device for a chromatograph according to claim 2, wherein: Each liquid storage compartment includes a liquid storage tank with an open top and a top cover. A sealing gasket is arranged at the bottom of the top cover corresponding to the top opening of the liquid storage tank. A gas release solenoid valve is also arranged on the top cover. The microprocessor controls the liquid replenishment solenoid valve and the gas release solenoid valve to open and close synchronously.

4. The self-supplementary liquid supply device for a chromatograph according to any one of claims 1-3, characterized in that: The liquid replenishment pipeline includes an inlet section, an intermediate section, and an outlet section. The inlet section passes through the top of the liquid storage compartment and is fixedly connected. The outlet section passes through the top of the sealed liquid supply bottle and is fixedly connected. Both ends of the intermediate section are respectively connected to the top end of the inlet section and the top end of the outlet section. The liquid replenishment solenoid valve is arranged on the intermediate section.

5. The self-supplementary liquid supply device for a chromatograph according to claim 4, characterized in that: The sealed liquid supply bottle includes a bottle body and a bottle cap. The outlet section and the liquid supply pipe are both fixed on the bottle cap.

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