CN211453343U - Spectrophotometer - Google Patents

Abstract

The utility model relates to a spectrophotometer, comprising a main body, a measuring cavity is arranged on the main body, and a colorimetric frame for placing a cuvette containing a sample and a light detection device for detecting the sample are arranged in the measuring cavity; The main body is provided with a display screen for displaying measurement data and a button for controlling the detection; a signal amplifier is arranged between the display screen and the light detection device, a mounting block is arranged in the measuring cavity, and a mounting block is arranged on the upper side of the mounting block. A T-shaped slot; the colorimetric frame is embedded in the T-shaped slot, and it is slidingly connected with the mounting block; there are openings on both sides of the T-shaped slot, the size of the opening is adapted to the size of the sliding block, and the sliding block passes through the opening It is embedded in the T-shaped groove; the colorimetric frame is provided with a pull rod, and one end of the pull rod passes out to the outside of the body. The utility model can be relatively convenient to disassemble the contrast color rack, and when cleaning it, it is relatively convenient to align and clean.

Description

a spectrophotometer

technical field

The utility model relates to the technical field of experimental equipment, in particular to a spectrophotometer.

Background technique

A spectrophotometer, also known as a spectrometer, is a scientific instrument that decomposes light with complex components into spectral lines. Quantitative analysis.

1 and 2, it is an existing spectrophotometer, which includes a main body 1, a measuring cavity 11 is opened on the main body 1 for placing the objects to be measured, and a cover 111 is provided at the position of the measuring cavity 11 for The measurement cavity 11 is closed; a display screen 12 and a button 13 are provided on the body 1 at one side of the measurement cavity 11 to display the measured data and perform measurement operations; the measurement cavity is provided with a light detection device 2 and The signal amplifier 3, the light detection device 2 is connected with the signal amplifier 3 and the signal amplifier 3 is connected with the display screen 12; the measuring cavity 11 is provided with a colorimetric frame 4, and the colorimetric frame 4 and the main body 1 are slidingly connected for placing There are cuvettes with different samples; the colorimetric frame 4 is provided with a pull rod 5 , and one end of the pull rod 5 penetrates to the outside of the main body 1 .

When using the spectrophotometer to detect samples, first adjust the measurement accuracy of the spectrophotometer, load different samples into different cuvettes, and then place the cuvettes on the colorimetric rack 4 On the above, the sample is detected by the light detection device 2, and the tested data is transmitted to the display screen 12 through the signal amplifier 3, and the measured data can be directly observed. After a period of use, the sample in the cuvette may be accidentally spilled onto the cuvette 4, and the cuvette 4 needs to be cleaned to ensure its internal environment. Clean shape, reducing the phenomenon that affects the detection of the sample, but the existing spectrophotometer is designed in one piece, when cleaning its interior, the cleaning operation of the contrast color rack 4 is more troublesome, and it is inconvenient for the contrast color rack 4 to carry out clean.

Utility model content

In view of the deficiencies of the prior art, one of the purposes of the present invention is to provide a spectrophotometer, which can be easily disassembled by setting the installation structure of the internal colorimetric rack, and then clean it after cleaning. , it is easier to align for cleaning operations.

The above utility model purpose of the present utility model is achieved through the following technical solutions: a spectrophotometer, comprising a main body, a measuring cavity is arranged on the main body, a cover body for sealing the measuring cavity is arranged at the opening position of the measuring cavity, and the measuring cavity is The cavity is provided with a colorimetric frame for placing the cuvette with the sample, and a light detection device for detecting the sample; a display screen for displaying measurement data and a button for controlling the detection are provided on the body; A signal amplifier is arranged between the screen and the light detection device, an installation block is arranged in the measuring cavity, and a T-shaped groove is arranged on the upper side of the installation block; The sliding block, the colorimetric frame is embedded in the T-shaped groove, and the sliding connection is made between it and the mounting block; the two sides of the T-shaped groove are respectively provided with openings, and the size of the opening is adapted to the size of the sliding block, and the sliding block passes through the opening. It is embedded in the T-shaped groove; the colorimetric frame is provided with a pull rod, and one end of the pull rod passes out to the outside of the body.

By adopting the above technical solution, when using the spectrophotometer to detect the sample, the sample is firstly divided into a plurality of cuvettes, then the cuvettes are placed on the colorimetric rack, the cover is closed, and the light is passed through. The detection device detects the sample in one of the cuvettes. After recording the data, the position of the internal cuvettes is adjusted by pulling the lever, and the sample in the other cuvettes is carefully detected to obtain the data. And record, when it is necessary to clean the colorimetric rack, first remove the lever from the colorimetric rack, slide the colorimetric rack to the position where the sliding block is opposite to the opening, pull out the colorimetric rack from the T-shaped slot, and compare the colorimetric rack. For cleaning, when installing, align the sliding block with the opening, and install the colorimetric frame into the T-shaped groove, so that the colorimetric frame slides in the T-shaped groove; it is more convenient to align the sliding block with the opening. The colorimetric rack is disassembled and installed. When the colorimetric rack needs to be cleaned, the colorimetric rack can be easily disassembled from the body. When operating, it does not require a long time, saving time and convenient operation.

In a preferred example of the present invention, it can be further configured as follows: the mounting block is provided with a sealing plate, and the sealing plate has two pieces, which are respectively arranged at the positions corresponding to the two openings to close the openings; The opposite side walls of the plate are respectively provided with molding strips, and the two sides of the opening are provided with corresponding embedding grooves, and the filling strips are embedded in the corresponding embedding grooves; the side inside the opening is provided with a receiving groove, and the sealing plate A shielding plate is arranged at a position corresponding to the accommodating groove, and the shielding plate is embedded in the corresponding accommodating groove; a stopper is arranged on the upper side of the sealing plate.

By adopting the above technical solution, when the colorimetric rack is installed, the shielding plate is located in the accommodating groove, the two openings are in an unclosed state, the sliding block is aligned with the openings, and the colorimetric rack is installed in the T-shaped groove. Slide the sealing plate, pull the shielding plate out of the accommodating groove, the sealing plate closes the opening, and limits the sliding block on the lower side. There is a phenomenon of upward tilting on one side of the colorimeter to ensure the stability of the colorimeter sliding in the T-shaped groove.

In a preferred example of the present invention, it can be further configured as follows: a plurality of return springs are respectively arranged in the accommodating grooves, and two ends of the restoring springs are respectively connected to the shielding plate and the groove bottom of the accommodating groove; In the long state, the sealing plate is in a state of closing the opening.

By adopting the above technical solution, when the colorimetric rack is installed in the T-shaped groove, the sealing plate is slid so that the shielding plate is embedded in the accommodating groove, the return spring is compressed, and the colorimetric rack is installed in the T-shaped groove, and then released. The sealing plate, under the action of the return spring, closes the opening, which can be more convenient to seal the opening and reduce the occurrence of forgetting to close the opening and pulling the colorimetric frame, the end of the colorimetric frame appears upward tilt The phenomenon.

In a preferred example of the present invention, it can be further configured that: the mounting block and the main body are slidingly connected, and a lifting component for driving the mounting block to lift is arranged between the main body and the mounting block.

By adopting the above technical solution, when the contrast color rack needs to be disassembled and installed, the lifting assembly controls the mounting block to ascend to the opening position of the measurement cavity, and the space is sufficient, and the contrast color rack can be easily disassembled and installed.

In a preferred example of the present invention, it can be further configured as follows: the lifting assembly includes a screw rod, a lifting motor, a first bevel gear and a second bevel gear; a mounting plate is provided at the position of the opening of the measuring cavity, and the screw rod is vertically arranged , its upper and lower ends are respectively rotatably supported on the mounting plate and the bottom surface of the measuring cavity, the screw rod passes through the mounting block and is matched with the mounting block by threads; the lifting motor is arranged on the bottom surface of the measuring cavity; the first bevel gear is fixed on the bottom surface of the screw rod the lower end; the second bevel gear is fixed on the output end of the lift motor and meshes with the first bevel gear; the mounting block is provided with a groove for accommodating the lift motor, the first bevel gear and the second bevel gear.

By adopting the above technical solution, when it is necessary to control the rise of the mounting block, by pressing the button, the lifting motor is controlled to work, the screw is driven to rotate, and the mounting block is driven to rise and fall, and the lifting of the mounting block can be controlled more conveniently.

In a preferred example of the present invention, it can be further configured as follows: guide blocks are respectively provided on the other three side surfaces of the mounting block except the side where the screw rod is located; A guide groove is provided at the position, and the wire is quickly embedded in the corresponding guide groove.

By adopting the above technical solution, when the mounting block is controlled to lift and lower, the guide block can be used to limit the position of the mounting block relatively stably, so that the mounting block can be guaranteed to be in a horizontal state, and installation can be reduced during the lifting and lowering of the mounting block. The friction between the block and the body makes the lifting process of the mounting block more stable and smooth.

In a preferred example of the present invention, it can be further configured as follows: a connecting block is arranged on the side where the colorimetric frame is connected with the pull rod, and a threaded blind hole is arranged on the connecting block; The utility model is inserted into the threaded blind hole, and is threadedly connected with the connecting block; the end of the tie rod located outside the main body is provided with a grip plate.

By adopting the above technical solution, when the colorimetric frame needs to be disassembled, it is rotated and pulled, the end of the colorimetric frame is unscrewed from the threaded blind hole, and then pulled out, and then the installation block is controlled to rise, and the colorimetric frame is removed from the installation block. After disassembling, when connecting the tie rod to the colorimetric frame, pass the tie rod through the body, and screw the end of the tie rod into the threaded blind hole, so that the tie rod can be easily disassembled and installed, and the operation is more convenient.

In a preferred example of the present invention, it can be further configured as follows: the draw rod is provided with a limit component for first-moving the moving distance of the draw rod, which includes a limit post, a limit spring and an adjustment sleeve; There is an installation slot on it, the limit post is embedded in the installation slot, and it is slidingly connected with the pull rod. A plurality of limit slots are opened on the side of the limit post away from the pull rod. The distance is the same as the distance between two adjacent cuvettes on the colorimetric frame; there are multiple limit springs, which are arranged in the installation groove, and the two ends are respectively connected to the limit post and the bottom of the installation groove; A limit piece is set at the position corresponding to the position post, and its size is adapted to the size of the limit slot. When the spring is in the original length state, the limit piece is embedded in the limit slot; the end of the limit post facing the grip plate is set as The inclined plane, the adjusting sleeve is sleeved on the tie rod to adjust the position of the limit post.

By adopting the above technical solution, when pulling the pull rod to drive the colorimetric frame to move, firstly, the adjusting sleeve is slid in the reverse direction of the limit column, the limit column is squeezed into the installation groove, and the pull rod is pulled to make the limit piece contact It is connected to the position between the upper limit grooves of the limit post. At this time, slide the adjustment sleeve to the direction of the grip plate, and continue to pull the pull rod. When the pull rod moves to the position corresponding to the limit piece and the limit groove, the limit piece is embedded. Fixing its position in the limit groove can more accurately adjust the position of the colorimetric rack. During the measurement process, it is not easy to accidentally touch the pull rod and cause the position of the colorimetric rack to change. The measurement process is more stable and less prone to errors.

To sum up, the present utility model includes at least one of the following beneficial technical effects:

1. It is set by the installation structure of the contrast color stand. When the contrast color stand needs to be cleaned, it can be more convenient to control the mounting block to rise to the opening position of the measurement cavity, and the disassembly and installation of the contrast color stand can be easily completed. It saves time when cleaning the contrast color rack, and the operation is more convenient;

2. By setting the structure of the tie rod, when the tie rod is connected to the colorimetric frame, it is more convenient to install the tie rod and the colorimetric frame, and through the social limit component, when the pulling rod is pulled to drive the colorimetric frame to slide. When testing the samples in the same color dish, it is more convenient and accurate to adjust the moving distance of the pulling rod, and the adjustment angle is higher, which reduces the phenomenon of errors.

Description of drawings

Fig. 1 is the schematic diagram of a kind of existing spectrophotometer;

Fig. 2 is the schematic diagram done in order to show the internal structure of the existing spectrophotometer;

Fig. 3 is the structural representation of the spectrophotometer in the present embodiment;

Fig. 4 is the schematic diagram done in order to show the connection structure of the colorimetric frame and the mounting block;

Fig. 5 is the schematic diagram done in order to demonstrate the structure of the mounting block;

Fig. 6 is the enlarged schematic diagram of A part in Fig. 5;

Fig. 7 is the schematic diagram done in order to show the structure of the lifting assembly;

Fig. 8 is the enlarged schematic diagram of part B in Fig. 7;

FIG. 9 is a schematic diagram for showing the structure of the limiting assembly;

FIG. 10 is an enlarged schematic view of part C in FIG. 9 .

In the figure, 1, body; 11, measuring cavity; 111, cover body; 12, display screen; 13, button; 14, mounting plate; 15, switch; 16, guide groove; 17, limit piece; 2, light detection device; 3. signal amplifier; 4. colorimetric stand; 41, sliding block; 42, connecting block; 421, threaded blind hole; 5, tie rod; 51, grip plate; 52, installation slot; 6, installation block; 61, T-slot; 62, opening; 63, sealing plate; 631, molding; 632, shielding plate; 633, stopper; 64, embedding groove; 65, accommodating groove; 66, return spring; 67, groove; 68, Guide block; 7. Lift assembly; 71, Screw; 72, Lift motor; 73, First bevel gear; 74, Second bevel gear; 8, Limit assembly; 81, Limit post; 811, Limit slot; 82 , Limit spring; 83. Adjust the sleeve.

Detailed ways

The present utility model will be described in further detail below in conjunction with the accompanying drawings.

3 and 4, it is a spectrophotometer disclosed by the utility model, comprising a main body 1, a light detection device 2, a signal amplifier 3, a colorimetric frame 4 and a pull rod 5; the main body 1 is provided with a measuring cavity 11, the measuring cavity A cover 111 is arranged at the position of 11 to seal the measuring cavity 11; a display screen 12 and a button 13 are arranged on the main body 1, the measured results are displayed through the display screen 12, and the sample is measured by the button 13; The light detection device 2 is arranged in the measurement cavity 11, which is fixed on the side wall of the measurement cavity 11 to measure the sample; the signal amplifier 3 is arranged in the measurement cavity 11, and is electrically connected with the light detection device 2, The signal amplifier 3 is connected with the display; the colorimetric frame 4 is arranged in the measuring cavity 11 , which is connected with the main body 1 in a sliding manner; , it is slidingly connected with the body 1; sliding blocks 41 are respectively provided at the lower edge positions of the opposite two sides of the colorimetric frame 4; a mounting block 6 is provided in the measuring cavity 11, which is horizontally arranged in the measuring cavity 11, the upper side of the mounting block 6 is provided with a T-shaped groove 61 along its length direction, the width of the notch is less than the width of the groove bottom, and the lower side of the colorimetric frame 4 is embedded in the T-shaped groove 61; T Openings 62 are respectively provided on both sides of the shaped groove 61 , and the size of the openings 62 is adapted to the size of the sliding block 41 .

When using the spectrophotometer to detect a sample, the sample is firstly divided into a plurality of cuvettes, then the cuvettes are placed on the colorimetric rack 4 , the cover 111 is closed, and the photodetection device 2 is used to detect the sample. The sample in one of the cuvettes is detected, and after recording the data, the position of the inner cuvettes 4 is adjusted by pulling the lever 5, and the sample in the other cuvettes is carefully detected. Record, when the colorimetric frame 4 needs to be cleaned, first remove the pull rod 5 from the colorimetric frame 4, slide the colorimetric frame 4 to the position where the sliding block 41 is opposite to the opening 62, and remove the colorimetric frame 4 from the T-shaped groove. 61, and the colorimetric frame 4 is cleaned. When installing, align the sliding block 41 with the opening 62, and install the colorimetric frame 4 into the T-shaped groove 61, so that the colorimetric frame 4 slides in the T-shaped groove 61.

By performing the above settings, it is only necessary to align the sliding block 41 with the opening 62, and then the color comparison rack 4 can be easily disassembled and installed. When the color comparison rack 4 needs to be cleaned, the color comparison rack 4 can be easily removed from the body 1. When disassembled, it does not take a long time to operate, which saves time and is easy to operate.

4 and 5, the mounting block 6 is provided with a sealing plate 63, and there are two sealing plates 63, which are respectively arranged on the two openings 62 on the mounting block 6 to the corresponding positions to seal the two openings 62; Filling strips 631 are provided on the opposite side walls of the sealing plate 63 , and inserting grooves 64 corresponding to the filling strips 631 are respectively provided on both sides of the opening 62 . There is a sliding connection between the blocks 6; an accommodating groove 65 is provided on the side of the inner side of the opening 62, and a shielding plate 632 is provided on the sealing plate 63 at the position corresponding to the accommodating groove 65, and the shielding plate 632 is embedded in the accommodating groove 65; the sealing plate Blocks 633 are respectively provided on the upper side of 63 .

When the colorimetric rack 4 is installed, the shielding plate 632 is located in the accommodating groove 65, and the two openings 62 are not closed. Align the sliding block 41 with the openings 62, and install the colorimetric rack 4 into the T-shaped groove 61. When the sealing plate 63 is slid, the shielding plate 632 is pulled out from the accommodating groove 65. The sealing plate 63 closes the opening 62 and limits the sliding block 41 on the lower side. When the colorimetric frame 4 is moved by the pull rod 5, it can The phenomenon that the side of the colorimetric frame 4 away from its connection with the tie rod 5 appears to be tilted upward is reduced, and the stability of the colorimetric sliding in the T-shaped groove 61 is ensured.

5 and 6, two return springs 66 are respectively provided in the accommodating groove 65, and the two ends thereof are respectively fixed with the shielding plate 632 and the groove bottom of the accommodating groove 65. When the springs are in the original length state, the sealing plate 63 is in the The state where the opening 62 is closed; when the colorimetric frame 4 is installed in the T-shaped groove 61, the sealing plate 63 is slid so that the shielding plate 632 is embedded in the accommodating groove 65, the return spring 66 is compressed, and the colorimetric frame 4 is installed in the accommodating groove 65. After entering the T-shaped groove 61, release the sealing plate 63. Under the action of the return spring 66, the sealing plate 63 closes the opening 62, which can be more convenient to realize the sealing of the opening 62 and reduce the occurrence of forgetting to close the opening 62 and pulling. When the colorimetric frame 4 is used, the end of the colorimetric frame 4 appears to be lifted upwards.

When the color comparison rack 4 is disassembled, it can be seen that the size of the measuring cavity 11 is small, and it is difficult to operate the comparison color rack 4. Therefore, referring to FIG. 7 and FIG. For sliding connection, the mounting block 6 can be lifted vertically; the body 1 is provided with a lifting assembly 7, which is connected with the mounting block 6 to drive the mounting block 6 to slide in the vertical direction.

Through the above settings, when the contrast color rack 4 needs to be disassembled and installed, the lifting assembly 7 controls the mounting block 6 to ascend to the position of the opening 62 of the measurement cavity 11, and the space is sufficient, and the contrast color rack 4 can be disassembled and installed more conveniently. .

7 and 8, the lifting assembly 7 includes a screw 71, a lifting motor 72, a first bevel gear 73 and a second bevel gear 74; a mounting plate 14 is provided on the side of the opening 62 of the measuring cavity 11, and the screw 71 is vertical The upper and lower ends are respectively rotatably supported on the mounting plate 14 and the bottom surface of the measuring cavity 11 , the screw 71 passes through the mounting block 6 and is screwed with the mounting block 6 ; the lifting motor 72 is arranged on the bottom surface of the measuring cavity 11 The first bevel gear 73 is fixed on the lower end of the screw 71, which rotates synchronously with the screw 71; the second bevel gear 74 is fixed on the output shaft of the lifting motor 72, and meshes with the first bevel gear 73; on the mounting block 6 Positions corresponding to the lift motor 72 , the first bevel gear 73 and the second bevel gear 74 are provided with corresponding grooves 67 ; the side wall of the body 1 is provided with a switch 15 for controlling the lift motor 72 .

When it is necessary to control the mounting block 6 to rise, by pressing the button 13, the lifting motor 72 is controlled to work, the screw 71 is driven to rotate, and the mounting block 6 is driven to ascend and descend.

Referring to FIG. 7 , guide blocks 68 are respectively provided on the other three sides of the mounting block 6 except the side where the screw 71 is located; guide blocks 68 are provided on the side walls of the measuring cavity 11 in the body 1 at the positions corresponding to the guide blocks 68 . The groove 16 and the guide blocks 68 are respectively embedded in the corresponding guide grooves 16, and the guide blocks 68 and the main body 1 are slidingly connected; when the mounting block 6 is controlled to be lifted and lowered, the guide blocks 68 provided can be used to adjust the position of the mounting block 6. The position is relatively stably limited, so that the mounting block 6 is guaranteed to be in a horizontal state, and the friction between the mounting block 6 and the body 1 can be reduced during the lifting and lowering of the mounting block 6, so that the lifting process of the mounting block 6 will be more stable and smooth.

Referring to FIG. 9 , a connecting block 42 is provided at the middle position on the side where the colorimetric frame 4 is connected with the pull rod 5 , and a threaded blind hole 421 is opened at the middle position on the connecting block 42 ; the end of the pull rod 5 is provided with a thread , which is matched with the threaded blind hole 421; the end of the pull rod 5 located on the outside of the main body 1 is fixed with a grip plate 51; out, pull it out, then control the mounting block 6 to rise, remove the colorimetric frame 4 from the mounting block 6, when connecting the pull rod 5 to the colorimetric frame 4, pass the pull rod 5 through the main body 1, its end The part is screwed into the threaded blind hole 421, so that the pull rod 5 can be easily disassembled and installed, and the operation is more convenient.

9, 10, the side of the tie rod 5 is provided with a limit assembly 8 to limit the distance that the tie rod 5 pulls the colorimetric frame 4 to slide, which includes a limit column 81, a limit spring 82 and an adjustment sleeve 83; A mounting slot 52 is provided on the side of the pull rod 5 , a limit post 81 is arranged in the installation slot 52 , and is in a sliding connection with the pull rod 5 , and a plurality of limit slots are provided on the side of the limit post 81 facing away from the pull rod 5 . 811, the distance between the adjacent limit grooves 811 is the same as the distance between two adjacent cuvettes on the colorimetric frame 4; there are multiple limit springs 82, which are arranged in the installation groove 52, and their ends are respectively fixed. Connected to the limit post 81 and the bottom of the installation slot 52; the position of the main body 1 corresponding to the limit post 81 is provided with a limit piece 17, the limit piece 17 corresponds to the size of the limit slot 811, and the limit piece 17 is embedded The position of the pull rod 5 is fixed in the corresponding limit groove 811; the end of the limit column 81 located on the outer side of the main body 1 is set as an inclined plane, and the adjustment sleeve 83 is sleeved on the pull rod 5, and is located between the limit column 81 and the grip plate 51. During this time, the inner diameter of the adjusting sleeve 83 is adapted to the diameter of the tie rod 5, and the adjusting sleeve 83 is slid in the direction of the limit post 81, which cooperates with the inclined surface of the limit post 81 to move the limit post 81 toward the installation slot 52. Press in the middle, so that the limit post 81 is located in the installation groove 52 .

When pulling the pull rod 5 to drive the colorimetric frame 4 to move, first slide the adjustment sleeve 83 in the reverse direction of the limit post 81, squeeze the limit post 81 into the installation groove 52, and pull the pull rod 5 to make the limit piece 17 is in contact with the position between the upper limit groove 811 of the limit post 81, at this time, slide the adjustment sleeve 83 towards the direction of the grip plate 51, continue to pull the pull rod 5, and the pull rod 5 moves to the limit piece 17 and the limit groove 811 At the corresponding position, the limit piece 17 is embedded in the limit slot 811 to fix its position, which can be adjusted more accurately compared to the position of the color frame 4, and it is not easy to accidentally touch the pull rod 5 during the measurement process. And the phenomenon that the position of the colorimetric frame 4 changes, the measurement process of the sample is more stable, and errors are less likely to occur.

The examples of this specific embodiment are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore: all equivalent changes made according to the structure, shape and principle of the present invention are not It should be covered within the protection scope of the present invention.

Claims (8)

1. A spectrophotometer, comprising a main body (1), a measurement cavity (11) is provided on the main body (1), and a cover for closing the measurement cavity (11) is provided at the position of an opening (62) of the measurement cavity (11) The measuring chamber (11) is provided with a colorimetric frame (4) for placing the cuvette containing the sample, and a light detection device (2) for detecting the sample; A display screen (12) for measuring data and a button (13) for controlling detection; a signal amplifier (3) is arranged between the display screen (12) and the light detection device (2), and is characterized in that: a measuring cavity (11) ) is provided with a mounting block (6), the upper side of the mounting block (6) is provided with a T-shaped groove (61); the lower edge positions of the two opposite sides of the colorimetric frame (4) are respectively provided with sliding slides The block (41), the colorimetric frame (4) is embedded in the T-shaped groove (61), and it is slidingly connected with the mounting block (6); the two sides of the T-shaped groove (61) are respectively provided with openings (62), The size of the opening (62) is adapted to the size of the sliding block (41), and the sliding block (41) is inserted into the T-shaped groove (61) through the opening (62); the colorimetric frame (4) is provided with a pull rod (5). ), and one end of the pull rod (5) protrudes to the outside of the main body (1). 2. A spectrophotometer according to claim 1, characterized in that: the mounting block (6) is provided with a sealing plate (63), and the sealing plate (63) has two pieces, which are respectively arranged on two The positions corresponding to the openings (62) are used to close the openings (62); the opposite side walls of the sealing plate (63) are respectively provided with moldings (631), and both sides of the opening (62) are provided with moldings (631). 631) corresponding insert grooves (64), the insert strips (631) are embedded in the corresponding insert grooves (64); a receiving groove (65) is provided on the side surface of the inner side of the opening (62), and the sealing plate (63) A shielding plate (632) is provided at a position corresponding to the accommodating groove (65), and the shielding plate (632) is embedded in the corresponding accommodating groove (65); a stopper (633) is provided on the upper side of the sealing plate (63) . 3. A spectrophotometer according to claim 2, characterized in that: a plurality of return springs (66) are respectively provided in the accommodating groove (65), and both ends of the return spring (66) are respectively connected to the shielding The plate (632) and the groove bottom of the accommodating groove (65); when the return spring (66) is in the original length state, the sealing plate (63) is in the state of closing the opening (62). 4. A spectrophotometer according to claim 3, characterized in that: the mounting block (6) and the main body (1) are slidingly connected, and the main body (1) and the mounting block (6) are provided with There is a lifting assembly (7) for driving the mounting block (6) to lift and lower. 5. A spectrophotometer according to claim 4, characterized in that: the lifting assembly (7) comprises a screw (71), a lifting motor (72), a first bevel gear (73) and a second bevel gear (74); a mounting plate (14) is provided at the position of the opening (62) of the measuring cavity (11), the screw rod (71) is vertically arranged, and its upper and lower ends are respectively rotatably supported on the mounting plate (14) and the measuring cavity ( 11) On the bottom surface, the screw rod (71) passes through the mounting block (6) and is screwed with the mounting block (6); the lifting motor (72) is arranged on the bottom surface of the measuring chamber (11); the first bevel gear ( 73) is fixed on the lower end of the screw (71); the second bevel gear (74) is fixed on the output end of the lifting motor (72) and meshes with the first bevel gear (73); the mounting block (6) is provided with a A groove (67) for accommodating the lift motor (72), the first bevel gear (73) and the second bevel gear (74). 6. A spectrophotometer according to claim 5, characterized in that: guide blocks (68) are respectively provided on the other three sides of the mounting block (6) except the side where the screw (71) is located. A guide groove (16) is provided on the side wall of the measuring cavity (11) in the body (1) at a position corresponding to the guide block (68), and the wire is quickly embedded in the corresponding guide groove (16). 7. A spectrophotometer according to claim 1, characterized in that: a connecting block (42) is provided on the side where the colorimetric frame (4) is connected with the pull rod (5), and the connecting block (42) is provided with a connecting block (42). There is a threaded blind hole (421); the end of the pull rod (5) is provided with a thread, the end of the pull rod (5) is inserted in the threaded blind hole (421), and the connecting block (42) is threadedly connected; (5) A grip plate (51) is provided on the end portion located on the outer side of the main body (1). 8 . The spectrophotometer according to claim 7 , characterized in that: the draw rod ( 5 ) is provided with a limit assembly ( 8 ) for pre-moving the moving distance of the draw rod ( 5 ), comprising: 8 . A limit post (81), a limit spring (82) and an adjustment sleeve (83); an installation groove (52) is provided on the side of the tie rod (5), and the limit post (81) is embedded in the installation groove (52) ), there is a sliding connection between it and the pull rod (5), a plurality of limit grooves (811) are provided on the side of the limit column (81) away from the pull rod (5), and the adjacent limit grooves (811) are provided with a plurality of limit grooves (811). The distance is the same as the distance between two adjacent cuvettes on the colorimetric frame (4); there are multiple limit springs (82), which are arranged in the installation groove (52), and the two ends are respectively connected to the limit post (81) It is connected with the bottom of the installation groove (52); the position of the main body (1) corresponding to the limit post (81) is provided with a limit piece (17), the size of which is adapted to the size of the limit groove (811), and the spring When in the original length state, the limiting piece (17) is embedded in the limiting groove (811); the end of the limiting post (81) facing the grip plate (51) is set as an inclined surface, and the adjusting sleeve (83) is sleeved on the The tie rod (5) is used to adjust the position of the limit post (81).

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