Differential refraction detector

Abstract

The utility model provides a differential refraction detector which comprises a differential refraction detector body, a protection assembly is arranged on the right side of the front end face of the differential refraction detector body, an air blowing assembly is arranged on the right end face of the differential refraction detector body, and an air blowing head is inserted into a liquid inlet head. Then a micro air pump is electrified to work and blows air into the differential refraction detector body through an air guide hose, an air blowing head and a liquid inlet head, so that residual clean water in the differential refraction detector body can be blown out and cleaned, and a dustproof shell is clamped on a connecting frame, so that the dustproof shell can perform dustproof protection on the liquid inlet head and a liquid outlet head; in the process, the magnet piece and the magnetic rubber piece which are attracted can assist in fixing the dustproof shell, and the sealing piece can improve the sealing performance between the rear end face of the dustproof shell and the differential refraction detector body, so that the liquid inlet head and the liquid outlet head are prevented from being polluted by dust when not in use.

Description

Technical Field

[0001] The utility model relates to the technical field of differential refraction detectors, in particular to a differential refraction detector. Background Art

[0002] The differential refractometer detector is a universal detector designed according to the principle of refraction and belongs to the deflection type. The optical path of the detector is composed of the main components such as light source, convex mirror, detection cell, reflector, flat glass, and dual photoresistor. The detection cell has two cell chambers for reference and measurement, which are connected in series for the optical path. The light source forms an image in front of the light barrier through the condenser and the slit, and serves as the incident light of the detection cell. The outgoing light shines on the reflector, the light is reflected, and then incident on the detection cell. The outgoing light shines on the dual photoresistor through the transmission mirror to form a slit image. The dual photoresistor is the two arms of the measuring bridge. When the reference cell and the measuring cell flow through the same solvent, the amount of light shining on the dual photoresistor is the same. At this time, the bridge is balanced and the output is zero. When the measured sample flows through the measuring cell, the refractive index changes, causing the light beam shining on the dual photoresistor to deflect, causing the resistance value of the dual photoresistor to change. At this time, the bridge outputs a signal, which reflects the change in sample concentration.

[0003] The differential refractive index detector in the prior art does not have a corresponding dust-proof protection structure to protect the unused liquid inlet and liquid outlet, resulting in dust easily adhering to the exposed liquid inlet and liquid outlet when the differential refractive index detector is not in use. Therefore, before each use, the staff needs to clean the dust from the liquid inlet and liquid outlet respectively, thereby increasing the workload of the staff;

[0004] Furthermore, after each use of the existing differential refractometer, it is necessary to flush out all the mobile phase inside the differential refractometer with pure water, and then use an ear cleaning bulb and aim it at the liquid inlet end to blow air to blow out all the pure water remaining in the differential refractometer to avoid contamination of the interior by the residual liquid inside the differential refractometer. However, this cleaning method is not only inefficient, but also the hands of the staff are prone to soreness during the use of the ear cleaning bulb, and is not practical. Utility Model Content

[0005] The purpose of the utility model is to provide a differential refractive index detector to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A differential refractive index detector comprises a differential refractive index detector body, a support, a liquid inlet head and a liquid outlet head, wherein the support is installed at the bottom of the differential refractive index detector body, the liquid inlet head is arranged on the right side of the front end face of the differential refractive index detector body, the liquid outlet head is arranged below the liquid inlet head, a protection component is arranged on the right side of the front end face of the differential refractive index detector body, and the protection component is used to perform dust protection on the liquid inlet head and the liquid outlet head, and an air blowing component is arranged on the right end face of the differential refractive index detector body, and the air blowing component is used to blow out the residual liquid inside the differential refractive index detector body.

[0008] Preferably, the protection component includes a dustproof shell, an anti-slip sheet and a connecting frame. The connecting frame is fixedly connected to the right side of the front end surface of the differential refractive index detector body. The front end of the connecting frame is clamped with a dustproof shell, and the anti-slip sheets are symmetrically pasted on the left and right end surfaces of the dustproof shell.

[0009] Preferably, the left and right end surfaces of the connection frame are symmetrically fixedly connected with magnetic rubber sheets, the left and right inner walls of the dustproof shell are symmetrically provided with magnet sheets, and the magnet sheets are adsorbed to the magnetic rubber sheets.

[0010] Preferably, the air blowing assembly includes a supporting plate, a limiting seat, a micro air pump, an air guiding hose and an air blowing head; the supporting plate is installed on the right end face of the differential refractive index detector body, a micro air pump is installed on the rear side of the upper end face of the supporting plate, the limiting seat is fixedly connected to the front side of the upper end face of the supporting plate, the air blowing head is inserted inside the limiting seat, and an air guiding hose is connected between the inlet of the air blowing head and the outlet of the micro air pump.

[0011] Preferably, a sealing ring is mounted on the annular side surface of the air blowing head, and the sealing ring is made of silicone rubber. A fixed throat clamp is installed on the annular side surface of the air guide hose, and the air blowing head matches the liquid inlet head.

[0012] Preferably, a protective bushing is fixedly connected inside the limiting seat, and the inner diameter of the protective bushing is the same as the outer diameter of the blowing head, and the material of the protective bushing is sponge rubber.

[0013] Preferably, a sealing sheet is provided on the rear end surface of the dustproof shell, and the sealing sheet is in a frame shape. The sealing sheet is made of silicone rubber, and the dustproof shell matches the connecting frame.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. By inserting the air blowing head into the liquid inlet head, and then energizing the micro air pump to blow air into the differential refractive index detector body through the air guide hose, the air blowing head and the liquid inlet head, the clean water remaining in the differential refractive index detector body can be blown out and cleaned. Not only is the cleaning efficiency fast, but the labor intensity of the staff is also low;

[0016] 2. By mounting the dustproof cover on the connection frame, the dustproof cover can protect the liquid inlet and outlet heads from dust. During this process, the magnet sheets and magnetic rubber sheets that are attracted to each other will assist in fixing the dustproof cover to prevent the dustproof cover from loosening and slipping during use. The sealing sheet can improve the sealing between the rear end face of the dustproof cover and the differential refractive index detector body, thereby preventing the liquid inlet and outlet heads from being contaminated by dust when not in use. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 This is a structural diagram of the utility model after the dust cover is disassembled;

[0019] Figure 3 This is a state diagram of the air blowing component in the utility model blowing out the residual liquid inside the differential refractive index detector body;

[0020] Figure 4 This is a structural diagram of the air blowing component in the utility model;

[0021] Figure 5 It is a structural diagram of the protection component in the utility model.

[0022] In the figure: 1. differential refractive index detector body; 2. protection assembly; 21. dust cover; 22. anti-slip sheet; 23. connection frame; 24. magnet sheet; 25. sealing sheet; 26. magnetic rubber sheet; 3. support; 4. blowing assembly; 41. supporting plate; 42. limit seat; 43. micro air pump; 44. air guide hose; 441. fixed throat clamp; 45. blowing head; 451. sealing ring; 46. protective bushing; 5. liquid inlet head; 6. liquid outlet head. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-5 , the utility model provides a technical solution:

[0025] Embodiment 1:

[0026] A differential refractive index detector comprises a differential refractive index detector body 1, a support 3, a liquid inlet head 5 and a liquid outlet head 6. The support 3 is installed at the bottom of the differential refractive index detector body 1. Four groups of the support 3 are installed, and the four groups of supports 3 have the same specifications. The four groups of supports 3 can stably support the differential refractive index detector body 1. A liquid inlet head 5 is arranged on the right side of the front end surface of the differential refractive index detector body 1. The liquid inlet head 5 facilitates the entry of a mobile phase to be tested into the differential refractive index detector body 1 for detection. A liquid outlet head 6 is arranged below the liquid inlet head 5. The liquid outlet head 6 facilitates the outflow of the mobile phase after detection inside the differential refractive index detector body 1. Since the internal detailed structure and working principle of the differential refractive index detector body 1 are relatively mature technologies in the prior art, they will not be described in detail here.

[0027] A protection component 2 is provided on the right side of the front end face of the differential refractive index detector body 1, and the protection component 2 is used to provide dust protection for the liquid inlet head 5 and the liquid outlet head 6. A blowing component 4 is provided on the right end face of the differential refractive index detector body 1, and the blowing component 4 is used to blow out the residual liquid inside the differential refractive index detector body 1.

[0028] The protection component 2 includes a dustproof shell 21, an anti-slip sheet 22 and a connecting frame 23. The connecting frame 23 is fixedly connected to the right side of the front end face of the differential refractive index detector body 1. The connecting frame 23 is fixed to the right side of the front end face of the differential refractive index detector body 1 by structural adhesive. The connecting frame 23 facilitates the dustproof shell 21 to be mounted on the right side of the front end face of the differential refractive index detector body 1. The dustproof shell 21 is mounted on the front end of the connecting frame 23. The dustproof shell 21 matches the connecting frame 23. The dustproof shell 21 can provide dustproof protection for the unused liquid inlet head 5 and liquid outlet head 6.

[0029] The left and right end surfaces of the dustproof shell 21 are symmetrically attached with anti-skid sheets 22, which make the left and right end surfaces of the dustproof shell 21 more anti-skid, and prevent the staff from easily slipping off when pinching the dustproof shell 21 for disassembly and assembly. The left and right end surfaces of the connecting frame 23 are symmetrically fixed with magnetic rubber sheets 26, which are fixed to the left and right end surfaces of the connecting shell by bonding. The left and right sides of the inner wall of the dustproof shell 21 are symmetrically provided with magnet sheets 24, which are fixed to the left and right sides of the inner wall of the dustproof shell 21 by bonding. 24 is adsorbed with the magnetic rubber sheet 26, and the adsorbed magnetic sheet 24 and the magnetic rubber sheet 26 can assist in positioning the dustproof shell 21 mounted on the outer wall of the connecting frame 23, so as to prevent the dustproof shell 21 from loosening and slipping easily during use. A sealing sheet 25 is arranged on the rear end face of the dustproof shell 21, and the sealing sheet 25 is frame-shaped, and the sealing sheet 25 is made of silicone rubber. The sealing sheet 25 with a frame shape and made of silicone rubber can improve the sealing between the rear end face of the dustproof shell 21 and the differential refractive index detector body 1.

[0030] Embodiment 2:

[0031] On the basis of the first embodiment, in this embodiment, by inserting the air blowing head 45 into the liquid inlet head 5, and then energizing the micro air pump 43 to blow air into the differential refractive index detector body 1 through the air guide hose 44, the air blowing head 45 and the liquid inlet head 5, the clean water remaining in the differential refractive index detector body 1 can be blown out and cleaned, which not only has a fast cleaning efficiency but also has a low labor intensity for the staff.

[0032] The air blowing assembly 4 includes a supporting plate 41, a limiting seat 42, a micro air pump 43, an air guide hose 44 and an air blowing head 45. The supporting plate 41 is installed on the right end surface of the differential refractive index detector body 1. The supporting plate 41 is L-shaped. The L-shaped supporting plate 41 can be used to support the micro air pump 43 and the limiting seat 42. The micro air pump 43 is installed on the rear side of the upper end surface of the supporting plate 41. The micro air pump 43 can blow air to the air guide hose 44 when working. Since the internal detailed structure and working principle of the micro air pump 43 belong to the prior art The technique is relatively mature, so I will not go into details here. The front side of the upper end of the support plate 41 is fixedly connected to a limiting seat 42, which supports and limits the protective sleeve 46. A blowing head 45 is inserted inside the limiting seat 42, and the blowing head 45 matches the liquid inlet head 5. The blowing head 45 is a hollow structure, and the blowing head 45 is conveniently inserted into the liquid inlet head 5, so that the micro air pump 43 can blow air into the differential refractometer body 1 through the air guide hose 44 and the blowing head 45 to blow out the residual liquid through the liquid outlet head 6.

[0033] An air guide hose 44 is connected between the inlet of the blowing head 45 and the outlet of the micro air pump 43. The air guide hose 44 facilitates the micro air pump 43 to blow air inside the air blowing head 45. A sealing ring 451 is mounted on the annular side of the air blowing head 45, and the sealing ring 451 is made of silicone rubber. The sealing ring 451 made of silicone rubber makes the air blowing head 45 inserted in the liquid inlet head 5 more sealed. A fixed throat hoop 441 is installed on the annular side of the air guide hose 44. Two groups of fixed throat hoop 441 are installed, and the specifications of the two groups of fixed throat hoop 441 are the same. The two groups of fixed throat hoop 441 can install and fix the two ends of the air guide hose 44. A protective sleeve 46 is fixedly connected to the inside of the limit seat 42, and the inner diameter of the protective sleeve 46 is the same as the outer diameter of the air blowing head 45. The protective sleeve 46 is made of sponge rubber. The protective sleeve 46 made of sponge rubber can provide buffering protection for the air blowing head 45 inserted in the limit seat 42.

[0034] Working principle: After the differential refractive index detector body 1 is rinsed with clean water, the staff first disassembles the pipes connected to the liquid inlet head 5 and the liquid outlet head 6, then pulls up the air blowing head 45 and inserts it into the liquid inlet head 5, and then puts the dust cover 21 flat under the liquid outlet head 6 (refer to Figure 3), at this time, the micro air pump 43 can be connected to the external power supply, so that the micro air pump 43 is powered on to blow air into the air guide hose 44, and the air guide hose 44 will guide the air to the inside of the blowing head 45, so that the blowing head 45 blows the air into the differential refractive index detector body 1 through the liquid inlet head 5, and all the clean water remaining in the differential refractive index detector body 1 is blown out, and most of the blown clean water will drip downward into the dustproof shell 21 through the liquid outlet head 6 to prevent the blown clean water from spilling all over the ground. When the liquid outlet head 6 no longer flows out the residual clean water, it indicates that all the clean water in the differential refractive index detector body 1 is blown out. At this time, the micro air pump 43 can be turned off and the blowing head 45 can be pulled to separate it from the liquid inlet head 5, and then the blowing head 45 is vertically inserted into the protective bushing 46 for storage and protection; then The staff first pours out the water inside the dustproof shell 21, and then the dustproof shell 21 can be clamped on the connecting frame 23, so that the dustproof shell 21 can provide dust-proof protection for the liquid inlet head 5 and the liquid outlet head 6. During this process, the magnet sheet 24 will be adsorbed with the magnetic rubber sheet 26 to prevent the dustproof shell 21 from loosening and slipping easily during use, and the sealing sheet 25 can improve the sealing between the rear end face of the dustproof shell 21 and the differential refractive index detector body 1, thereby preventing the liquid inlet head 5 and the liquid outlet head 6 from being contaminated by dust when not in use. When the differential refractive index detector body 1 needs to be used, the staff only needs to pinch the dustproof shell 21 and pull and disassemble it, and then the liquid inlet head 5 and the liquid outlet head 6 can be connected to the external pipeline, so that the differential refractive index detector body 1 can detect the mobile phase to be measured flowing into the external pipeline.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A differential refractive index detector, comprising a differential refractive index detector body (1), a support (3), a liquid inlet head (5) and a liquid outlet head (6), characterized in that: A support (3) is installed at the bottom of the differential refractive index detector body (1); a liquid inlet head (5) is arranged on the right side of the front end surface of the differential refractive index detector body (1); and a liquid outlet head (6) is arranged below the liquid inlet head (5); A protection component (2) is provided on the right side of the front end surface of the differential refractive index detector body (1), and the protection component (2) is used to provide dust protection for the liquid inlet head (5) and the liquid outlet head (6); a blowing component (4) is provided on the right end surface of the differential refractive index detector body (1), and the blowing component (4) is used to blow out the residual liquid inside the differential refractive index detector body (1).

2. A differential refractive index detector according to claim 1, characterized in that: The protection component (2) comprises a dustproof shell (21), an anti-slip sheet (22) and a connection frame (23); the connection frame (23) is fixedly connected to the right side of the front end surface of the differential refractive index detector body (1); the dustproof shell (21) is clamped on the front end of the connection frame (23); and the anti-slip sheets (22) are symmetrically attached to the left and right end surfaces of the dustproof shell (21).

3. A differential refractive index detector according to claim 2, characterized in that: The left and right end surfaces of the connection frame (23) are symmetrically fixedly connected with magnetic rubber sheets (26), and the left and right sides of the inner wall of the dustproof shell (21) are symmetrically provided with magnet sheets (24), and the magnet sheets (24) and the magnetic rubber sheets (26) are adsorbed.

4. A differential refractive index detector according to claim 1, characterized in that: The air blowing assembly (4) comprises a supporting plate (41), a limiting seat (42), a micro air pump (43), an air guide hose (44) and an air blowing head (45); the supporting plate (41) is installed on the right end face of the differential refractive index detector body (1); the micro air pump (43) is installed on the rear side of the upper end face of the supporting plate (41); the limiting seat (42) is fixedly connected to the front side of the upper end face of the supporting plate (41); the air blowing head (45) is inserted into the limiting seat (42); and the air guide hose (44) is connected between the inlet of the air blowing head (45) and the outlet of the micro air pump (43).

5. A differential refractive index detector according to claim 4, characterized in that: The annular side surface of the air blowing head (45) is sleeved with a sealing ring (451), and the sealing ring (451) is made of silicone rubber. The annular side surface of the air guide hose (44) is installed with a fixed throat clamp (441). The air blowing head (45) matches the liquid inlet head (5).

6. A differential refractive index detector according to claim 4, characterized in that: A protective bushing (46) is fixedly connected inside the limiting seat (42), and the inner diameter of the protective bushing (46) is the same as the outer diameter of the blowing head (45), and the material of the protective bushing (46) is sponge rubber.

7. A differential refractive index detector according to claim 2, characterized in that: A sealing sheet (25) is provided on the rear end surface of the dustproof shell (21), and the sealing sheet (25) is in a frame shape. The sealing sheet (25) is made of silicone rubber. The dustproof shell (21) matches the connection frame (23).

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