Colorimetric pool based on spectrophotometric method

Abstract

The colorimetric pool comprises a cavity, a cuvette, a light source and an optical detector, a cavity used for placing the cuvette is arranged in the cavity, the cavity penetrates through the upper surface of the cavity, a first external thread ring and a second external thread ring are arranged on the outer wall of the upper portion of the cavity from top to bottom, and the first external thread ring and the second external thread ring are arranged on the outer wall of the upper portion of the cavity. The second external thread ring of the cavity is connected with a locking flange used for being connected with spectrophotometric detection equipment, and the first external thread ring of the cavity is connected with a light shield used for sealing the cavity; the cavity is of a vertically split structure and comprises a cavity body and a side sealing cover, the cavity is arranged on the cavity body, one side face of the cavity is exposed, and the side sealing cover is fixed to the side face of the cavity body in an attached mode and seals the exposed side face of the cavity. The cavity of the colorimetric pool is of a vertically split structure, so that the right angle at the bottom of the cavity is convenient to process, and the whole colorimetric pool is mounted on spectrophotometric detection equipment through a locking flange and is convenient to assemble and disassemble.

Description

Technical Field

[0001] This invention provides a colorimetric cell based on spectrophotometry, belonging to the field of spectrophotometric detection technology. Background Technology

[0002] Spectrophotometry is a method for qualitative or quantitative analysis of a substance by measuring its absorbance at a specific wavelength or within a certain wavelength range. It is widely used in chemical, environmental, medical, and food industries. The applicant's patent CN209542443U, filed in 2019, discloses a formaldehyde-ammonia analysis device that uses spectrophotometry to detect and analyze the concentration of harmful gases (formaldehyde and ammonia) in the air. Other common spectrophotometers based on spectrophotometry include ultraviolet spectrophotometers, visible light spectrophotometers, and infrared spectrophotometers. The cuvette is a key component of formaldehyde-ammonia analysis devices and spectrophotometers. Existing cuvettes are usually built-in, integrated structures, which are inconvenient for inspection and maintenance. Furthermore, the chamber within the cuvette for holding the cuvettes is typically a vertically elongated rectangular structure, and the right angle at the bottom of the chamber is difficult to machine. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a colorimetric cell based on spectrophotometry. The cell has a vertically split structure, which facilitates the right-angle machining of the bottom of the chamber. Furthermore, the entire colorimetric cell is installed on the spectrophotometric detection equipment via a locking flange, making it easy to install and remove.

[0004] The technical solution adopted to achieve the above-mentioned objectives of this utility model is as follows:

[0005] A spectrophotometric cuvette includes a cavity, cuvettes, a light source, and an optical detector. The cavity contains a chamber for holding the cuvettes. The light source and optical detector are mounted opposite each other on opposite sides of the chamber. The light source illuminates the sample in the cuvette, and the optical detector receives the light signal after passing through the cuvette. The chamber is located in the middle of the cavity and extends through its upper surface. The upper outer wall of the cavity has a first external threaded ring and a second external threaded ring from top to bottom. A locking flange for connection to a spectrophotometric detection device is connected to the second external threaded ring, and a light shield for sealing the chamber is connected to the first external threaded ring. The cavity has a vertically split structure, including a main body and side covers. The chamber is located on the main body, with one side exposed. The side covers are fixed against the side of the main body to seal the exposed side of the chamber.

[0006] A metal spring is installed on the side wall of the cavity between the light source and the optical detector. When the cuvette is placed in the cavity, the metal spring is locked onto the frosted surface of the cuvette.

[0007] The metal spring is fixed to the upper surface of the cavity and extends into the cavity.

[0008] The cavity has a mounting hole on its side wall that connects to the cavity. A temperature sensor is installed in the mounting hole, but the temperature sensor does not extend into the cavity.

[0009] The diameter of the first external thread ring is smaller than the diameter of the second external thread ring.

[0010] The locking flange is provided with a second internal thread ring that matches the second external thread ring.

[0011] The light shield is provided with a first internal thread ring that matches the first external thread ring.

[0012] The cavity has a light-transmitting port and a detection port connected to the cavity on two opposite side walls along the horizontal direction. The light source and the optical detector are respectively installed in the light-transmitting port and the detection port.

[0013] The cavity is provided with clearance grooves on both sides of the bottom of the chamber.

[0014] Compared with the prior art, the colorimetric cell based on spectrophotometry provided by this utility model has the following advantages: 1. The cavity of the colorimetric cell based on spectrophotometry provided by this utility model is a vertically split structure, exposing one side of the cavity, which facilitates the processing of the right angle at the bottom of the cavity; moreover, the entire colorimetric cell has a simple structure and low manufacturing cost.

[0015] 2. The locking flange in this utility model facilitates the installation and disassembly of the entire colorimetric cell, making it easy to inspect and maintain. This structure also allows for panel-mounted installation of the colorimetric cell. Furthermore, the locking flange can lock the upper part of the split structure cavity, ensuring the stability of the cavity connection.

[0016] 3. In this utility model, the metal spring sheet set on the side wall of the chamber clamps the frosted surface of the cuvette, ensuring the stable placement of the cuvette and preventing it from shaking during the measurement process. It is suitable for laboratory and outdoor field testing of spectrophotometric detection equipment. Attached Figure Description

[0017] Figure 1 An exploded view of the colorimetric cell based on spectrophotometry provided by this utility model;

[0018] Figure 2 An assembly diagram of the colorimetric cell based on spectrophotometry provided by this utility model;

[0019] Figure 3 A cross-sectional view of the colorimetric cell based on spectrophotometry provided by this utility model;

[0020] In the diagram: 1-Cavity, 101-Cavity body, 102-Side cover, 2-Cuvette, 3-Light source, 4-Optical detector, 5-Cavity, 6-Light transmission port, 7-Detection port, 8-First external threaded ring, 9-Second external threaded ring, 10-Locking flange, 11-Light shield, 12-Second internal threaded ring, 13-First internal threaded ring, 14-Allowing groove, 15-Metal spring, 16-Mounting hole, 17-Temperature sensor. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following embodiments.

[0022] This embodiment provides a spectrophotometric cuvette, including a cavity 1, a cuvette 2, a light source 3, and an optical detector 4. The cavity contains a chamber 5 for holding the cuvette. The light source and optical detector are mounted opposite each other on opposite sides of the chamber. The light source emits light of a specific wavelength to illuminate the sample in the cuvette. The optical detector receives the light signal after passing through the cuvette and converts it into a corresponding electrical signal, thus enabling the detection and analysis of the sample. Its structure is as follows: Figures 1-3 As shown in the diagram. Specifically, the cavity has a light-transmitting port 6 and a detection port 7 horizontally arranged on two opposite side walls of the chamber, respectively. The light source and optical detector are fixed to the side walls of the cavity and located inside the light-transmitting port and the detection port, respectively (i.e., neither the light source nor the optical detector extends into the cavity), ensuring that both face the cavity and do not affect the placement of the cuvette. Furthermore, when installing the light source and optical detector, care must be taken to seal the light-transmitting port and the detection port to ensure the cavity's airtightness. Specifically, the light source and optical detector are fixed to a sealing plate, which is abutted and fixed to the cavity, thereby sealing the light-transmitting port and the detection port.

[0023] In this embodiment, the overall shape of the cavity is a "round top and square bottom" structure. The chamber is located in the middle of the cavity and extends through the upper surface of the cavity. From top to bottom, the upper outer wall of the cavity is provided with a first external threaded ring 8 and a second external threaded ring 9. Specifically, the diameter of the first external threaded ring is smaller than the diameter of the second external threaded ring. A locking flange 10 for connecting to spectrophotometric detection equipment (such as a formaldehyde-ammonia analyzer or spectrophotometer) is connected to the second external threaded ring of the cavity. A light shield 11 for sealing the cavity is connected to the first external threaded ring of the cavity. Specifically, a second internal threaded ring 12 matching the second external threaded ring is provided on the locking flange; a first internal threaded ring 13 matching the first external threaded ring is provided on the light shield. The locking flange facilitates the installation and disassembly of the entire colorimetric cell, making inspection and maintenance easier. Furthermore, this structural design allows for easy fixing of the colorimetric cell to the equipment panel, satisfying panel-mounted installation requirements.

[0024] In this embodiment, the cavity has a vertically split structure, including a cavity body 101 and a side cover 102. The cavity is disposed on the cavity body, with one side of the cavity exposed. The side cover is abutted and fixed to the side of the cavity body, sealing the exposed side of the cavity. The split structure facilitates the processing of the cavity. Specifically, the side cover and the cavity body are fixedly connected by bolts. In addition, a locking flange can also lock the upper part of the side cover and the cavity body, ensuring the stability of the connection between the two.

[0025] In this embodiment, clearance grooves 14 are provided on both sides of the bottom of the cavity to avoid the right angle of the bottom of the cuvette.

[0026] In this embodiment, a metal spring 15 is installed on the side wall of the cavity between the light source and the optical detector. When the cuvette is placed in the cavity, the metal spring is locked onto the frosted surface of the cuvette, ensuring that the cuvette is placed stably and does not shake during the measurement process. Specifically, the metal spring is fixed to the upper surface of the cavity and extends into the cavity to prevent fasteners (such as bolts) from affecting the placement of the cuvette.

[0027] In this embodiment, a mounting hole 16 communicating with the chamber is provided on the side wall of the cavity. A temperature sensor 17 is installed in the mounting hole. The temperature sensor does not extend into the chamber, thereby measuring the temperature inside the chamber and accurately measuring the current ambient temperature of the sample in real time without affecting the placement of the cuvette. In addition, when installing the temperature sensor, it is also necessary to ensure that the mounting hole is sealed. A sealing element can be installed on the temperature sensor before inserting it into the mounting hole to ensure the airtightness of the chamber.

Claims

1. A spectrophotometric cuvette, comprising a cavity, cuvettes, a light source, and an optical detector, wherein the cavity contains a chamber for holding the cuvettes, and the light source and optical detector are mounted opposite each other on two opposite sides of the chamber; the light source illuminates the sample to be tested in the cuvettes, and the optical detector receives the light signal after passing through the cuvettes; characterized in that: The chamber is located in the middle of the cavity and extends through the upper surface of the cavity. The upper outer wall of the cavity is provided with a first external thread ring and a second external thread ring from top to bottom. The second external thread ring of the cavity is connected to a locking flange for connecting to a spectrophotometric detection device. The first external thread ring of the cavity is connected to a light shield for sealing the cavity. The cavity has a vertically split structure, including a cavity body and a side cover. The chamber is located on the cavity body, and one side of the chamber is exposed. The side cover is abutted and fixed to the side of the cavity body to seal the exposed side of the chamber.

2. The spectrophotometry-based cuvette of claim 1, wherein: A metal spring is installed on the side wall of the cavity between the light source and the optical detector. When the cuvette is placed in the cavity, the metal spring is locked onto the frosted surface of the cuvette.

3. The spectrophotometry-based cuvette of claim 2, wherein: The metal spring is fixed to the upper surface of the cavity and extends into the cavity.

4. The spectrophotometry-based cuvette of claim 1, wherein: The cavity has a mounting hole on its side wall that connects to the cavity. A temperature sensor is installed in the mounting hole, but the temperature sensor does not extend into the cavity.

5. The spectrophotometry-based cuvette of claim 1, wherein: The diameter of the first external thread ring is smaller than the diameter of the second external thread ring.

6. The spectrophotometry-based cuvette of claim 1, wherein: The locking flange is provided with a second internal thread ring that matches the second external thread ring.

7. The spectrophotometry-based cuvette of claim 1, wherein: The light shield is provided with a first internal thread ring that matches the first external thread ring.

8. The spectrophotometry-based cuvette of claim 1, wherein: The cavity has a light-transmitting port and a detection port connected to the cavity on two opposite side walls along the horizontal direction. The light source and the optical detector are respectively installed in the light-transmitting port and the detection port.

9. The spectrophotometry-based cuvette of claim 1, wherein: The cavity is provided with clearance grooves on both sides of the bottom of the chamber.

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