Liquid level detection device

Abstract

The utility model discloses a liquid level detection device, which comprises a fixed support, a liquid level sensor, a liquid level sensor and a liquid level sensor, and is characterized in that the fixed support is of a cylindrical structure similar to the external shape of a solvent bottle; and the liquid level sensor is fixed on the fixed bracket, and when the fixed bracket is sleeved on the outer side of the solvent bottle, the liquid level sensor fixed on the fixed bracket can be tightly attached to the outer wall of the solvent bottle. And the circuit module comprises a wireless communication module and a data acquisition module. And the power supply component is connected with the liquid level sensor and the circuit module and is a power supply part for supplying power to the whole detection device. The solvent tray has the advantages and effects that 1) the structural complexity of the solvent tray is not increased; 2) the liquid level detection device is prevented from being in contact with the solvent, so that solvent cross contamination caused by components in contact with the solvent is avoided; 3) through a wireless communication mode, constraint of wire harness connection is avoided; and 4) the detection device is powered by a built-in micro battery or a wireless induction coil, so that the constraint of wiring harness connection is also avoided.

Description

Technical Field

[0001] The utility model relates to a liquid level detection device, in particular to a liquid level detection device applied to the liquid phase field, belonging to the technical field of liquid chromatography. Background Art

[0002] In the field of liquid chromatography applications, air often enters the liquid system after the solvent is used up. When air enters the liquid system, it will bring a series of adverse effects: for example, when air enters the system, it will cause waste of solvents and raw materials; or when air enters the chromatographic column, it will cause the performance of the chromatographic column to decrease or be damaged.

[0003] To overcome this problem, various manufacturers have designed some products to avoid the problem of solvent evaporation. The following are some of the solutions and describe the inherent disadvantages of these solutions:

[0004] Among them, for example, the invention patent with publication number CN114127517A and titled "Mobile Phase Residual Meter" has a weighing method directly integrated on the solvent tray: the weighing sensor and the corresponding mechanism are directly built on the solvent tray. The biggest disadvantage of this method is that the solvent tray has a complex structure.

[0005] Among them, the air pressure type: insert a tube into the solvent bottle, and measure the remaining amount of solvent by the change in air pressure inside the tube caused by the change in liquid level. For the specific structure, please refer to the document "Vanquish The Thermo Scientific Vanquish Solvent Monitor-Solvent Detection Module---Hydrostatic Principle". The biggest disadvantage of this method is that the extra tube will bring additional solvent cross-contamination.

[0006] Among them, the invention patent with publication number CN 211955337U and titled "Solvent Organizer with Mobile Phase Level Monitoring" uses a capacitive method directly integrated on the solvent tray: a non-contact capacitive sensor is designed on the side wall of the solvent tray, and the solvent bottle is close to the side wall of the solvent tray, and the liquid level is sensed by the capacitive sensor. In this method, the solvent tray needs to be designed in a grid shape. The capacitive sensor is installed on the side wall of the grid. The biggest disadvantage of this is that after the solvent tray is divided into grids, the placement of the solvent is not so free, and it is necessary to ensure that the solvent bottle must be close to the sensor. Utility Model Content

[0007] In order to solve the above problems existing in the prior art, the utility model provides a liquid level detection device, and designs a brand-new structure to prevent the solvent from running out and air from entering the liquid circuit system.

[0008] A liquid level detection device, comprising:

[0009] A fixed bracket, which is a cylindrical structure similar to the external shape of the solvent bottle;

[0010] Furthermore, the fixing bracket is an elastic cylindrical structure, so that it can be closely attached to the outside of the solvent bottle.

[0011] The liquid level sensor is fixed on the fixing bracket. When the (elastic) fixing bracket is sleeved on the outside of the solvent bottle, the liquid level sensor fixed thereon can also be closely attached to the outer wall of the solvent bottle.

[0012] The liquid level sensor may be a capacitive liquid level sensor, or a sensor with similar functions, such as a photoelectric liquid level sensor or an ultrasonic liquid level sensor.

[0013] The circuit module includes a wireless communication module and a data acquisition module.

[0014] The power supply component is connected to the liquid level sensor and the circuit module, and is the power supply part for the entire detection device.

[0015] Furthermore, the power supply component may be a battery, or a wireless induction coil power supply circuit, or a combination of a battery and a wireless induction coil power supply circuit.

[0016] Furthermore, the power supply component may be positioned according to a specific layout of the product, and may specifically be located at a side of the solvent bottle or at the bottom of the solvent bottle.

[0017] The utility model provides a liquid level detection device, the advantages and effects of which are:

[0018] 1) It does not increase the structural complexity of the solvent tray; 2) It avoids the need for the liquid level detection device to come into contact with the solvent, thereby avoiding cross-contamination of the solvent caused by components in contact with the solvent; 3) It avoids the constraints of wiring harness connection through wireless communication; 4) The detection device is powered by a built-in micro battery or a wireless induction coil, which also avoids the constraints of wiring harness connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are included in this specification to provide a further understanding of the utility model, and are incorporated into this specification and constitute a part of this specification. The accompanying drawings express the implementation of the utility model and are used together with the specification to explain the principle of the utility model. In the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the structure of the first embodiment of the utility model.

[0021] Figure 2 Schematic diagram of the cooperation between the first embodiment of the utility model and the solvent bottle in the liquid chromatograph

[0022] Figure 3 This is a schematic diagram of the structure of Embodiment 2 of the present utility model.

[0023] Figure 4 The circuit connection diagram of the novel embodiment 1 is shown in FIG.

[0024] The specific numbers in the figure are as follows:

[0025] 1. Fixed bracket 2. Liquid level sensor 3. Circuit module 4. Power supply module 5. Solvent bottle DETAILED DESCRIPTION

[0026] The structure of the utility model is further described below in conjunction with the drawings of the specification. The terms "front", "rear", "upper", "lower" and the like in the specification and claims are generally used for descriptive purposes and do not necessarily fully describe exclusive relative positions.

[0027] Example 1

[0028] A liquid level detection device used in the field of liquid chromatography, see Figure 1 , 2 The solvent bottle 5 of the liquid chromatograph is arranged inside the liquid level detection device, and the liquid level detection device comprises:

[0029] The fixed bracket 1 is a cylindrical structure having a shape similar to that of the solvent bottle.

[0030] Furthermore, the fixing bracket 1 is a tubular structure with elasticity, so that it can be closely attached to the outside of the solvent bottle.

[0031] The liquid level sensor 2 is fixed on the fixing bracket 1. When the fixing bracket with elasticity is sleeved on the outside of the solvent bottle, the liquid level sensor 2 fixed thereon can also be closely attached to the outer wall of the solvent bottle.

[0032] The liquid level sensor 2 may be a capacitive liquid level sensor, or a sensor with similar functions, such as a photoelectric liquid level sensor or an ultrasonic liquid level sensor.

[0033] Circuit module 3, including wireless communication module and data acquisition module. For the connection relationship between each module, please refer to Figure 4 .

[0034] The power supply component 4 is the power supply part of the entire detection device. The power supply component 4 can be a battery, or a wireless induction coil power supply circuit, or a combination of a battery and a wireless induction coil power supply circuit. The component can be located according to the specific layout of the product. In this embodiment 1, it is located on the side of the solvent bottle.

[0035] When in use, the user can put the liquid level detection device described in the present invention on the outside of the solvent bottle. Since the fixed bracket 1 has a certain elasticity, it is ensured that the liquid level sensor 2 is in close contact with the outer surface of the solvent bottle 5. The data acquisition module of the circuit module 3 is electrically connected to the liquid level sensor 2, and collects the signal of the liquid level sensor 2, so as to obtain the liquid level height inside the solvent bottle. The collected liquid level height signal can be sent to the upstream liquid phase system through the wireless communication module in the circuit module 3.

[0036] Example 2

[0037] A liquid level detection device used in the field of liquid chromatography, see Figure 3 The main structure and the position of the solvent bottle in this embodiment are the same as those in Embodiment 1, except that the power supply component 4 is a wireless induction coil located at the bottom of the solvent bottle.

Claims

1. A liquid level detection device, characterized in that: include: A fixed bracket, which is a cylindrical structure similar to the external shape of the solvent bottle; The liquid level sensor is fixed on the fixing bracket. When the fixing bracket is sleeved on the outside of the solvent bottle, the liquid level sensor fixed thereon is also closely attached to the outer wall of the solvent bottle. A circuit module, including a wireless communication module and a data acquisition module; The power supply component is connected to the liquid level sensor and the circuit module, and is the power supply part for the entire detection device.

2. A liquid level detection device according to claim 1, characterized in that: The fixing bracket is a tubular structure with elasticity, so that it can be closely attached to the outside of the solvent bottle.

3. A liquid level detection device according to claim 1, characterized in that: The liquid level sensor is a capacitive liquid level sensor, or a photoelectric liquid level sensor, or an ultrasonic liquid level sensor.

4. A liquid level detection device according to claim 1, characterized in that: The power supply component is a battery, or a wireless induction coil power supply circuit, or a combination of a battery and a wireless induction coil power supply circuit.

5. A liquid level detection device according to claim 1, characterized in that: The position of the power supply component is determined according to the specific layout of the product.

6. A liquid level detection device according to claim 5, characterized in that: The power supply component is located on the side of the solvent bottle or at the bottom of the solvent bottle.

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