Ultraviolet and visible spectrophotometer

Abstract

The utility model relates to the technical field of photometers, in particular to an ultraviolet and visible spectrophotometer which comprises a main machine, a detection box is installed on one side of the main machine, a sealing cover is hinged to one end of the detection box through a hinge, and a lifting groove is formed in one side of the sealing cover. A plurality of cuvettes are clamped to the inner side of the detection box through a mounting mechanism, the mounting mechanism comprises a butt-joint assembly, a pushing assembly and a rebound positioning assembly, the butt-joint assembly is used for preliminarily butt-joint mounting of the cuvettes and the detection box, and the rebound positioning assembly is used for locking the positions of the cuvettes. The pushing assembly is used for unlocking the cuvette, and the butt-joint assembly comprises a butt-joint block mounted at the bottom of the cuvette; the cuvette positioning and unlocking device is simple in structure and quick to operate, workers do not need to rotate the positioning bolts circle by circle to position and unlock the cuvettes 4, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photometers, and particularly relates to an ultraviolet-visible spectrophotometer. Background Technique

[0002] An ultraviolet-visible spectrophotometer is an instrument that uses the absorption of light in a certain wavelength range by molecules or ions of a substance to perform qualitative analysis, quantitative analysis, and structural analysis of the substance. The spectrophotometer includes a sample cell and a light source chamber. There are multiple sample slots in the sample cell, and the sample slots are used to place cuvettes. The cuvette (also known as the absorption cell or sample cell) is a key component of the photometric chamber. During analysis and testing, generally, two cuvettes containing a reference solution and a sample solution to be measured respectively are used simultaneously for separate testing (this is the case for single-beam or quasi-beam instruments, and double-beam instruments perform simultaneous testing), and the absorbance (or transmittance, generally the absorbance is compared) of the tests is compared. Theoretically speaking, as long as the width of the cuvette is constant and it is placed in the optical path, the absorbance value should be the same. However, since the focal point of light is at a fixed position, moving the cuvette causes its position not to be at the focal point of light, so there are differences in absorbance. Therefore, it is very important for the cuvette to be in the same fixed position to reduce the error of the detection result. However, the size of the sample slots in the existing ultraviolet-visible spectrophotometers is significantly larger than that of the cuvettes, resulting in easy front-back, left-right displacement after placement, making the absorbed light value inaccurate. Since an ultraviolet-visible spectrophotometer is a very precise instrument, any small error will lead to a huge difference in the analysis result and cause misjudgment.

[0003] In order to solve the above technical problems, the Chinese patent with the publication number CN205103154U in the prior art discloses an ultraviolet-visible spectrophotometer, including an outer shell, a handle, and an inner cavity. The handle is located on the side wall of the outer shell. The outer shell is provided with a control panel and a sample cell cover. There are multiple jacks in the inner cavity, and a positioning mechanism is provided at the bottom of the jacks. The ultraviolet-visible spectrophotometer provided by the utility model can make the position of the cuvette at the focal point of light by providing a positioning mechanism at the bottom of the jacks, ensure the same absorbance value, reduce the error of the detection result, thereby making the analysis and judgment accurate and providing a reference value for experimental analysis.

[0004] Although the above prior art solution can make the position of the cuvette at the focal point of light by providing a positioning mechanism at the bottom of the jacks, ensure the same absorbance value, and reduce the error of the detection result, the positioning process of the cuvette still requires the staff to rotate each group of positioning bolts one by one to complete the positioning and unlocking of the positions of each group of cuvettes, and the installation and disassembly are relatively cumbersome, thus affecting the detection efficiency. Content of the Utility Model

[0005] The purpose of the present utility model is to provide an ultraviolet-visible spectrophotometer to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above purpose, the present utility model provides the following technical solutions:

[0007] An ultraviolet-visible spectrophotometer includes a main unit. One side of the main unit is provided with a detection box. One end of the detection box is hinged with a sealing cover through a hinge. One side of the sealing cover is provided with a lifting groove. Inside the detection box, multiple cuvettes are clamped through a mounting mechanism. The mounting mechanism includes a docking component, a pushing component, and a spring-back positioning component. The docking component is used for initially docking and installing the cuvette and the detection box. The spring-back positioning component is used for locking the position of the cuvette. The pushing component is used for unlocking the locking of the cuvette.

[0008] As a preferred solution of the present utility model, the docking component includes a docking block installed at the bottom of the cuvette. Multiple docking grooves are arranged in a row inside the detection box. The docking grooves are slidably connected to the docking block. One side top of the docking block is provided with a first inclined surface. A rubber pad is installed outside the docking block at the bottom end of the cuvette.

[0009] As a preferred solution of the present utility model, the spring-back positioning component includes a limiting component, a spring-back component, and a positioning component. The limiting component includes a mounting groove opened inside the detection box on one side of the docking groove. A limiting frame is installed at the bottom end inside the mounting groove. A limiting groove is opened at the top end of the limiting frame. A limiting plate is slidably connected inside the limiting groove. A first spring is installed between the limiting plate and the inner wall of the limiting groove.

[0010] As a preferred solution of the present utility model, the spring-back component includes a fixed seat installed at one end of the limiting plate. Fixed grooves are opened at one ends of the opposite surfaces of the two fixed seats. A fixed rod is installed inside the fixed grooves. A second spring is installed between the opposite two fixed rods. Second inclined surfaces that fit the first inclined surface are opened at the other ends of the opposite surfaces of the two fixed seats.

[0011] As a preferred solution of the present utility model, the positioning component includes a retraction groove opened inside the fixed seat at the position of the second inclined surface. A retraction rod is rotatably connected inside the retraction groove. A retraction plate is installed on the outer side of the retraction rod. A third inclined surface is opened on one side of the retraction plate. A torsion spring is installed at one end of the retraction rod. A positioning groove is opened at the position of the first inclined surface on the outer wall of the docking block.

[0012] As a preferred solution of the present utility model, operation slots are provided on both sides of the outer wall of the detection box. A closing slot is provided on one side of the operation slot. A closing plate is slidably connected inside the closing slot. Connecting slots extending to the inside of the operation slot are provided on both sides of the inner wall of the closing slot. A connecting block slidably connected to the connecting slot is installed on the outer side of the closing plate. A magnetic block is embedded at one end of the closing plate. An iron block adsorbed to the magnetic block is embedded on the inner wall of the operation slot. A pulling slot is provided on the outer wall of the closing plate.

[0013] As a preferred solution of the present utility model, the pushing component includes a knob installed at one end of the fixed rod extending to the inside of the operation slot. A pushing slot extending to the inside of the installation slot is provided on the inner wall of the operation slot. The fixed rod is slidably connected to the pushing slot.

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

[0015] In the present utility model, the colorimetric cuvette and the detection box are initially docked and installed through the docking component. The rebound positioning component can lock the position of the colorimetric cuvette. The pushing component can unlock the locking of the colorimetric cuvette. The structure is simple and the operation is fast. There is no need for the staff to rotate each group of positioning bolts one by one to complete the positioning and unlocking of the positions of each group of colorimetric cuvettes, improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 is a schematic diagram of the structure at the connection between the colorimetric cuvette and the detection box of the present utility model;

[0018] Figure 3 is the present utility model Figure 1 is an enlarged schematic diagram of part A of the present utility model.

[0019] In the figure: 1, main machine; 2, detection box; 3, sealing cover; 4, colorimetric cuvette; 5, docking block; 6, first inclined surface; 7, rubber pad; 8, limiting frame; 9, limiting plate; 10, first spring; 11, fixed seat; 12, fixed rod; 13, second spring; 14, retracting rod; 15, retracting plate; 16, third inclined surface; 17, torsion spring; 18, closing plate; 19, connecting slot; 20, knob; 21, pushing slot; 22, magnetic block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Embodiment:

[0022] Please refer to Figures 1-3 , the present invention provides a technical solution:

[0023] An ultraviolet-visible spectrophotometer includes a main unit 1. A detection box 2 is installed on one side of the main unit 1. One end of the detection box 2 is hinged with a sealing cover 3 through a hinge. A lifting groove is opened on one side of the sealing cover 3. Inside the detection box 2, a plurality of cuvettes 4 are clamped through a mounting mechanism. The mounting mechanism includes a docking component, a pushing component, and a spring-back positioning component. The docking component is used for initially docking and installing the cuvette 4 and the detection box 2. The spring-back positioning component is used for locking the position of the cuvette 4. The pushing component is used for unlocking the locking of the cuvette 4. When this spectrophotometer is in use, the cuvette 4 and the detection box 2 can be initially docked and installed through the docking component. The spring-back positioning component can lock the position of the cuvette 4, and the pushing component can unlock the locking of the cuvette 4. The structure is simple and the operation is fast. There is no need for the staff to rotate each group of positioning bolts one by one to complete the positioning and unlocking of the positions of each group of cuvettes 4, improving the detection efficiency.

[0024] In this embodiment, as Figure 1 、 Figure 2 and Figure 3 shown, the docking component includes a docking block 5 installed at the bottom of the cuvette 4. A plurality of docking grooves are arranged in a row inside the detection box 2. The docking grooves are slidably connected to the docking block 5. A first inclined surface 6 is opened at the top end of one side of the docking block 5. A rubber pad 7 is installed outside the docking block 5 at the bottom end of the cuvette 4. First, align the two docking blocks 5 and snap them into the docking grooves, so that the docking block 5 and the fixed seat 11 are in partial contact, completing the initial docking of the cuvette 4 and the detection box 2.

[0025] In this embodiment, as Figure 1 、 Figure 2 and Figure 3As shown, the rebound positioning assembly includes a limit assembly, a rebound assembly and a positioning assembly. The limit assembly includes an installation groove opened inside the detection box 2 and located on one side of the docking groove. A limit frame 8 is installed at the bottom end of the inner side of the installation groove. A limit groove is opened on the top of the limit frame 8. The inner side of the limit groove is slidably connected to a limit plate 9. A first spring 10 is installed between the limit plate 9 and the inner wall of the limit groove. The rebound assembly includes a fixed seat 11 installed at one end of the limit plate 9. A fixed groove is opened at one end of the opposite surface of the two groups of fixed seats 11. A fixed rod 12 is installed inside the fixed groove. A second spring 13 is installed between the two opposite groups of fixed rods 12. A second inclined surface that fits the first inclined surface 6 is opened at the other end of the opposite surface of the two groups of fixed seats 11. The positioning assembly includes a retraction groove opened inside the fixed seat 11 and located at the second inclined surface. The retraction The inner side of the groove is rotatably connected with a retraction rod 14, and a retraction plate 15 is installed on the outer side of the retraction rod 14. A third inclined surface 16 is provided on one side of the retraction plate 15, and a torsion spring 17 is installed on one end of the retraction rod 14. A positioning groove is provided on the outer wall of the docking block 5 at the first inclined surface 6. Then, pressing downward, the first inclined surface 6 and the second inclined surface contact, so that the fixing seat 11 cooperates with the limiting plate 9 and the limiting groove to squeeze the first spring 10, and the docking block 5 is continued to be pressed. The first inclined surface 6 presses the third inclined surface 16 on the retraction plate 15, forcing it to retract to the inside of the retraction groove. After it is aligned with the positioning groove, the torsion spring 17 rebounds and drives the retraction plate 15 to expand inside the positioning groove. At this time, the rubber pad 7 is in a compressed state. After loosening, the rubber pad 7 rebounds for a distance and the retraction plate 15 is against the inner wall of the positioning groove, and the combined fixation can be completed.

[0026] In this embodiment, if Figure 1 , Figure 2 and Figure 3 As shown, the pushing assembly includes a knob 20 installed on the fixed rod 12 and extending to one end of the inner side of the operating groove. The inner wall of the operating groove is provided with a pushing groove 21 extending to the inner side of the mounting groove. The fixed rod 12 and the pushing groove 21 are slidably connected. Further, the two sets of knobs 20 are bent along the direction of the pushing groove 21, so that the fixed rod 12 drives the fixed seat 11 to cooperate with the limiting plate 9 and the limiting groove to actively compress the first spring 10 and stretch the second spring 13. At this time, the cuvette 4 can be pinched and lifted.

[0027] In this embodiment, if Figure 1 , Figure 2 and Figure 3As shown, operating grooves are provided on both sides of the outer wall of the detection box 2, and a closing groove is provided on one side of the operating groove. A closing plate 18 is slidably connected to the inner side of the closing groove. Connecting grooves 19 extending to the inner side of the operating groove are provided on both sides of the inner wall of the closing groove. A connecting block slidably connected to the connecting groove 19 is installed on the outer side of the closing plate 18, and a magnetic block 22 is embedded and installed at one end of the closing plate 18. An iron block adsorbed by the magnetic block 22 is embedded and installed on the inner wall of the operating groove. A buckle groove is provided on the outer wall of the closing plate 18. Furthermore, buckling the buckle groove drives the closing plate 18 to cooperate with the connecting groove 19 and the connecting block to close the operating groove. The magnetic block 22 and the iron block adsorb each other to cover the knob 20 to prevent people from accidentally touching it.

[0028] The implementation principle of the ultraviolet visible spectrophotometer of the embodiment of the present application is as follows: align the two sets of docking blocks 5 with the docking grooves and insert them so that the docking blocks 5 and the fixing seat 11 are partially in contact, and the initial docking of the cuvette 4 and the detection box 2 is completed. Press downward, the first inclined surface 6 and the second inclined surface are in contact, so that the fixing seat 11 cooperates with the limiting plate 9 and the limiting groove to squeeze the first spring 10, and continue to press the docking block 5. The first inclined surface 6 presses the third inclined surface 16 on the retraction plate 15, forcing it to retract to the inside of the retraction groove. After it is aligned with the positioning groove, the torsion spring 17 rebounds and drives the retraction plate 15 to expand inside the positioning groove. Open, at this time the rubber pad 7 is in a compressed state, after loosening the rubber pad 7 rebounds a distance and the retraction plate 15 abuts against the inner wall of the positioning groove, and the combined fixation is completed, and the two sets of knobs 20 are bent along the direction of the push groove 21, so that the fixing rod 12 drives the fixing seat 11 to cooperate with the limiting plate 9 and the limiting groove to actively compress the first spring 10 and stretch the second spring 13. At this time, the cuvette 4 can be pinched and lifted, and the buckle groove is buckled to drive the closing plate 18 to cooperate with the connecting groove 19 and the connecting block to close the operating groove. The magnetic block 22 and the iron block are adsorbed on each other to cover the knob 20 to prevent people from accidentally touching it.

[0029] 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 UV-visible spectrophotometer, comprising a main unit (1), characterized in that: A detection box (2) is installed on one side of the host (1), and a sealing cover (3) is hinged on one end of the detection box (2) through a hinge. A lifting groove is provided on one side of the sealing cover (3). A plurality of groups of cuvettes (4) are clamped on the inner side of the detection box (2) through an installation mechanism. The installation mechanism comprises a docking assembly, a pushing assembly and a rebound positioning assembly. The docking assembly is used for preliminarily docking and installing the cuvette (4) and the detection box (2), the rebound positioning assembly is used for locking the position of the cuvette (4), and the pushing assembly is used for unlocking the cuvette (4).

2. The UV-visible spectrophotometer according to claim 1, characterized in that: The docking assembly comprises a docking block (5) mounted on the bottom of the cuvette (4); a plurality of docking grooves are arranged on the inner side of the detection box (2); the docking grooves are slidably connected to the docking block (5); a first inclined surface (6) is provided on the top of one side of the docking block (5); and a rubber pad (7) is installed on the outer side of the docking block (5) at the bottom end of the cuvette (4).

3. A UV-visible spectrophotometer according to claim 2, characterized in that: The rebound positioning assembly comprises a limit assembly, a rebound assembly and a positioning assembly, the limit assembly comprises a mounting groove opened inside the detection box (2) and located on one side of the docking groove, a limit frame (8) is installed at the bottom end of the inner side of the mounting groove, a limit groove is opened at the top end of the limit frame (8), a limit plate (9) is slidably connected to the inner side of the limit groove, and a first spring (10) is installed between the limit plate (9) and the inner wall of the limit groove.

4. The UV-visible spectrophotometer according to claim 3, characterized in that: The rebound assembly comprises a fixing seat (11) mounted on one end of the limiting plate (9); a fixing groove is provided at one end of the opposite surface of the two groups of fixing seats (11); a fixing rod (12) is installed inside the fixing groove; a second spring (13) is installed between the two opposite groups of fixing rods (12); and a second inclined surface that fits the first inclined surface (6) is provided at the other end of the opposite surface of the two groups of fixing seats (11).

5. The UV-visible spectrophotometer according to claim 4, characterized in that: The positioning assembly comprises a retraction groove formed inside the fixing seat (11) and located at the second inclined surface; a retraction rod (14) is rotatably connected to the inner side of the retraction groove; a retraction plate (15) is installed on the outer side of the retraction rod (14); a third inclined surface (16) is formed on one side of the retraction plate (15); a torsion spring (17) is installed on one end of the retraction rod (14); and a positioning groove is formed on the outer wall of the docking block (5) and located at the first inclined surface (6).

6. The UV-visible spectrophotometer according to claim 5, characterized in that: Both sides of the outer wall of the detection box (2) are provided with operating grooves, one side of the operating groove is provided with a closing groove, the inner side of the closing groove is slidably connected to a closing plate (18), both sides of the inner wall of the closing groove are provided with connecting grooves (19) extending to the inner side of the operating groove, the outer side of the closing plate (18) is provided with a connecting block slidably connected to the connecting groove (19), one end of the closing plate (18) is embedded with a magnetic block (22), the inner wall of the operating groove is embedded with an iron block adsorbed by the magnetic block (22), and the outer wall of the closing plate (18) is provided with a buckle groove.

7. The UV-visible spectrophotometer according to claim 6, characterized in that: The push assembly comprises a knob (20) mounted on a fixed rod (12) and extending to one end of the inner side of an operating slot. The inner wall of the operating slot is provided with a push slot (21) extending to the inner side of the mounting slot. The fixed rod (12) and the push slot (21) are slidably connected.

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