Novel non-contact optical capillary tube quantifying device

Abstract

The utility model provides a novel non-contact optical capillary quantifying device. The novel non-contact optical capillary tube quantifying device comprises a tube groove disc (1), a groove is formed in the front face of the tube groove disc (1), a capillary tube (3) is installed in the groove in the tube groove disc (1), a cover plate (2) is installed on the front face of the tube groove disc (1) through screws, and a PCB (6) is installed on the back face of the tube groove disc (1) through screws. The novel non-contact optical capillary quantifying device is made of polytetrafluoroethylene materials with standard specifications, the inside is smooth, residual liquid does not exist on the inner wall of the capillary after quantification is completed, the capillary does not need to be cleaned after quantification is completed, cross contamination of reagents is avoided, and due to the fact that the capillary does not need to be cleaned, cost is reduced. Meanwhile, as the capillary tube is clamped in the tube groove, the capillary tube can be replaced by detaching the cover plate, and the capillary tube can be directly used without being adjusted after being replaced.

Description

Technical Field

[0001] The utility model belongs to the technical field of novel non-contact optical capillary quantitative devices, in particular to a novel non-contact optical capillary quantitative device. Background Art

[0002] At present, there are three main types of quantitative reagents in the field of instrumentation: optical quantitative tube quantification, syringe pump quantification, and peristaltic pump quantification.

[0003] Optical quantitative tube quantitative measurement is a non-contact optical measurement device that achieves quantitative measurement by detecting the position of the liquid in the glass tube. There are several disadvantages: a. After the quantitative measurement is completed, residual liquid will adhere to the inner wall of the glass tube, causing cross contamination for the next quantitative measurement; b. The position of the photoelectric sensor on the quantitative tube is relatively fixed and because the optical quantitative tube cannot be cascaded, it is not flexible enough when quantitatively measuring the liquid level; c. Because the inner diameter of the quantitative tube is relatively thick, usually between 5mm and 8mm, when there is external vibration, the pages inside the quantitative tube will shake, affecting the quantitative accuracy; d. Because the inner diameter of the quantitative tube is relatively thick, the quantitative accuracy is also relatively poor.

[0004] Syringe pump dosing is a contact optical dosing device with high dosing accuracy and flexible dosing volume, but it has the following disadvantages: a. Syringe pumps are expensive and complex to install, and their components include high-precision syringes, stepper motors, ball screws, couplings, guide rails, etc.; b. Syringe pump pistons wear out during use and need to be replaced regularly; c. The piston of the syringe is usually made of polytetrafluoroethylene, which is greatly affected by temperature, especially in winter. When the temperature is below 5°C, the piston shrinks greatly and is prone to leakage.

[0005] Peristaltic pump quantitative measurement is a contact optical measurement device, which is characterized by fast quantitative speed and can use multiple peristaltic pumps for quantitative measurement at the same time; it has the following disadvantages: a. High cost, the parts include pump head, pump tube, stepper motor, and driver; b. Poor quantitative accuracy and repeatability, and cannot be used in occasions with high quantitative requirements; c. The pump tube will gradually age after a few months of use, so it needs to be replaced regularly. Due to the poor quantitative accuracy and repeatability, it is rarely used in actual applications.

[0006] Therefore, it is necessary to provide a new non-contact optical capillary quantitative device to solve the above technical problems. Utility Model Content

[0007] The technical problem solved by the utility model is to provide a novel non-contact optical capillary quantitative device which is made of polytetrafluoroethylene material of standard specifications, has a smooth interior, and has no residual liquid on the inner wall after the capillary quantitative measurement is completed. Therefore, it is not necessary to clean the capillary after the quantitative measurement is completed, thereby avoiding cross contamination of reagents. Moreover, since it is not necessary to clean the capillary, the quantitative speed is improved and the replacement of the glass capillary is simple. At the same time, since the capillary is stuck in the tube groove, it can be replaced by removing the cover plate, and can be directly used without adjustment after replacement.

[0008] In order to solve the above technical problems, the utility model provides a novel non-contact optical capillary quantitative device comprising: a tube slot plate (1), wherein a slot is provided on the front of the tube slot plate (1), a capillary (3) is installed in the slot on the tube slot plate (1), a cover plate (2) is installed on the front of the tube slot plate (1) by means of screws, a PCB circuit board (6) is installed on the back of the tube slot plate (1) by means of screws, an LED indicator light (5) is welded on the PCB circuit board (6), and a photoelectric sensor (4) is welded on the PCB circuit board (6).

[0009] As a further solution of the utility model, the grooves on the tube groove plate (1) are grooves of a specific shape, and the grooves of the specific shape are used to limit the length of the capillary tube (3) and the installation position of the photoelectric sensor (4).

[0010] As a further solution of the utility model, the capillary tube (3) is stuck in a specific depth of a notch on a photoelectric sensor (4), and the photoelectric sensor (4) is used to emit light and refract it in the capillary tube (3).

[0011] As a further solution of the utility model, the pipe trough plate (1) is mounted with a mounting plate (7) by means of screws.

[0012] As a further solution of the utility model, one end of the capillary tube (3) is connected to the common channel of the rotary valve (8) through a polytetrafluoroethylene tube, and the end of the capillary tube (3) away from the rotary valve (8) is connected to a digestion tank box (9), and the upper end of the digestion tank box (9) is connected to a peristaltic pump (10).

[0013] As a further solution of the utility model, the cover plate (2) is a transparent plate, and the transparent plate can clearly observe the state of the liquid in the capillary (3). The groove of the tube groove plate (1) is a bilaterally symmetrical structure. The cover plate (2) is installed on the front side of the tube groove plate (1) by screws. The capillary (3) can be quickly replaced by removing the screws on the cover plate (2).

[0014] Compared with the related art, the novel non-contact optical capillary quantitative device provided by the utility model has the following beneficial effects:

[0015] 1. The utility model is made of standard polytetrafluoroethylene material, with a smooth interior. There is no residual liquid on the inner wall after the capillary is quantitatively measured. Therefore, there is no need to clean the capillary after the quantitative measurement is completed, which avoids cross contamination of reagents. Because there is no need to clean the capillary, the quantitative speed is improved and the replacement of the glass capillary is simple. At the same time, since the capillary is stuck in the tube groove, it can be replaced by removing the cover plate, and it can be used directly after replacement without adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the installation of the utility model;

[0019] Figure 3 It is an application schematic diagram of the utility model.

[0020] In the figure: 1. tube trough plate; 2. cover plate; 3. capillary tube; 4. photoelectric sensor; 5. LED indicator light; 6. PCB circuit board; 7. mounting plate; 8. rotary valve; 9. digestion tank; 10. peristaltic pump. DETAILED DESCRIPTION

[0021] Please refer to Figure 1 , Figure 2 and Figure 3 ,in, Figure 1 It is a schematic diagram of the structure of the utility model; Figure 2 This is a schematic diagram of the installation of the utility model; Figure 3 The utility model is an application schematic diagram. The novel non-contact optical capillary quantitative device comprises: a tube slot plate (1), a slot is provided on the front of the tube slot plate (1), a capillary (3) is installed in the slot on the tube slot plate (1), a cover plate (2) is installed on the front of the tube slot plate (1) by screws, a PCB circuit board (6) is installed on the back of the tube slot plate (1) by screws, an LED indicator light (5) is welded on the PCB circuit board (6), and a photoelectric sensor (4) is welded on the PCB circuit board (6).

[0022] The grooves on the tube groove plate (1) are grooves of a specific shape, and the grooves of the specific shape are used to define the length of the capillary tube (3) and the installation position of the photoelectric sensor (4), so that each device has a high consistency.

[0023] The capillary tube (3) is stuck in a specific depth of a notch on a photoelectric sensor (4), and the photoelectric sensor (4) is used to emit light and refract it in the capillary tube (3).

[0024] The pipe trough plate (1) is mounted with a mounting plate (7) via screws.

[0025] One end of the capillary tube (3) is connected to the common channel of the rotary valve (8) via a polytetrafluoroethylene tube, and the end of the capillary tube (3) away from the rotary valve (8) is connected to a digestion tank box (9), and the upper end of the digestion tank box (9) is connected to a peristaltic pump (10).

[0026] The cover plate (2) is a transparent plate, and the state of the liquid in the capillary (3) can be clearly observed through the transparent plate. The grooves of the tube groove plate (1) are of a bilaterally symmetrical structure, so that a plurality of the devices can be tightly installed in a row. The cover plate (2) is installed on the front side of the tube groove plate (1) by means of screws, and the capillary (3) can be quickly replaced by removing the screws on the cover plate (2).

[0027] The tube trough plate (1) has 4 groups, 3 in each group, for a total of 12 photoelectric sensor (4) mounting holes, and 3 photoelectric sensors form a group, which can detect 4 different liquid levels and achieve quantification of 4 different volumes;

[0028] The tube trough plate (1) has 4 groups, 3 in each group, for a total of 12 photoelectric sensor (4) mounting holes, and 3 photoelectric sensors form a group. When detecting the liquid level, the 3 photoelectric sensors (4) are combined with software algorithms to realize bubble detection and avoid quantitative errors.

[0029] Compared with the traditional optical quantitative tube quantification, the capillary of this device is made of standard specifications of polytetrafluoroethylene material, with a smooth interior. There is no residual liquid on the inner wall after the capillary quantification is completed. Therefore, there is no need to clean the capillary after the quantification is completed, avoiding cross contamination of reagents. Because there is no need to clean the capillary, the quantification speed is improved and the replacement of the glass capillary is simple. Since the capillary is stuck in the tube groove, it can be replaced by removing the cover plate, and it can be used directly after replacement without adjustment.

[0030] The rotary valve (8) switches to a designated channel, the peristaltic pump (10) rotates, and negative pressure is created in the digestion tank (9). The liquid slowly flows out of the rotary valve (8). When the liquid passes through a designated liquid level of the non-contact optical disc quantitative device, the control system receives a liquid level signal, controls the rotary valve (8) to switch to an air channel, and extracts a certain amount of liquid into the digestion tank (9), thereby completing one quantitative step.

[0031] It should be noted that the equipment structure and drawings of the utility model mainly describe the principle of the utility model. In terms of the technology of the design principle, the settings of the power mechanism, power supply system and control system of the device are not fully described. On the premise that the technical personnel in this field understand the principle of the above utility model, the details of the power mechanism, power supply system and control system can be clearly known. The control method of the application document is automatic control through a controller, and the control circuit of the controller can be realized by simple programming by the technical personnel in this field;

[0032] The standard parts used therein can all be purchased from the market and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the structures and principles of the components known to technical personnel in this field can be known by these technical personnel through technical manuals or through conventional experimental methods.

[0033] Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations or direct or indirect applications may be made to these embodiments without departing from the principles and spirit of the present invention. In other related technical fields, the scope of the present invention is defined by the attached claims and their equivalents, which are equally included in the scope of patent protection of the present invention.

Claims

1. A novel non-contact optical capillary quantitative device, characterized in that: include: A tube slot plate (1), wherein a slot is provided on the front of the tube slot plate (1), a capillary tube (3) is installed in the slot on the tube slot plate (1), a cover plate (2) is installed on the front of the tube slot plate (1) by means of screws, a PCB circuit board (6) is installed on the back of the tube slot plate (1) by means of screws, an LED indicator light (5) is welded on the PCB circuit board (6), and a photoelectric sensor (4) is welded on the PCB circuit board (6).

2. The novel non-contact optical capillary quantitative device according to claim 1, characterized in that: The grooves on the tube groove plate (1) are grooves of a specific shape, and the grooves of the specific shape are used to define the length of the capillary tube (3) and the installation position of the photoelectric sensor (4).

3. The novel non-contact optical capillary quantitative device according to claim 1, characterized in that: The capillary tube (3) is stuck in a specific depth of a notch on a photoelectric sensor (4), and the photoelectric sensor (4) is used to emit light and refract it in the capillary tube (3).

4. The novel non-contact optical capillary quantitative device according to claim 1, characterized in that: The pipe trough plate (1) is mounted with a mounting plate (7) via screws.

5. The novel non-contact optical capillary quantitative device according to claim 1, characterized in that: One end of the capillary tube (3) is connected to the common channel of the rotary valve (8) via a polytetrafluoroethylene tube, and the end of the capillary tube (3) away from the rotary valve (8) is connected to a digestion tank box (9), and the upper end of the digestion tank box (9) is connected to a peristaltic pump (10).

6. The novel non-contact optical capillary quantitative device according to claim 1, characterized in that: The cover plate (2) is a transparent plate, and the state of the liquid in the capillary (3) can be clearly observed through the transparent plate. The groove of the tube groove plate (1) is a bilaterally symmetrical structure. The cover plate (2) is mounted on the front of the tube groove plate (1) by means of screws. The capillary (3) can be quickly replaced by removing the screws on the cover plate (2).

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