Lakebed sludge heavy metal analysis and detection device

Abstract

The invention discloses a lakebed sludge heavy metal analysis and detection device, and relates to the technical field of lakebed sludge heavy metal analysis and detection by optical means, the lakebed sludge heavy metal analysis and detection device comprises a detection box body, and a protective door is hinged to the front side of the detection box body. In the process of analyzing and detecting lakebed sludge heavy metals in an ultraviolet irradiation mode, the liquid supply assembly, the lifting assembly and the transmission assembly are matched with one another, so that the detector, the ultraviolet light source and the monochromator are always in the middle position of liquid along with the rising of the liquid level of a sludge heavy metal solution in the sample pool; by controlling the detection position, the influence of the liquid level on light irradiation in the detection process is reduced, the detection precision is ensured, in the detection process, extrusion force is generated on the liquid level of the sludge heavy metal solution in the sample pool through the pressure supply assembly, the fluctuation amplitude of the sludge heavy metal solution is reduced, and the detection precision is further ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of analyzing and detecting heavy metals in lake bottom sludge by optical means, and specifically to an apparatus for analyzing and detecting heavy metals in lake bottom sludge. Background Technique

[0002] Analyzing heavy metals in lake bottom sludge by irradiating with ultraviolet light is a common detection method. During the analysis and detection process, the lake bottom sludge is processed into a solution state, and the liquid sludge heavy metal solution is irradiated by cooperating an ultraviolet light source and a monochromator. When the ultraviolet light irradiates the solution, the heavy metal ions will absorb light of a specific wavelength, resulting in a change in light intensity. Then, the intensity of the irradiated light is detected by a detector. According to the Lambert-Beer law, under certain conditions, the concentration of heavy metal ions is proportional to the absorbance. By measuring the absorbance of the sample to ultraviolet light of a specific wavelength, the heavy metal content can be calculated.

[0003] However, during the process of analyzing and detecting heavy metals in lake bottom sludge by irradiating with ultraviolet light, as the supply volume of the sludge heavy metal solution changes, the liquid level of the sludge heavy metal solution will change. While the detection positions of the detector, ultraviolet light source and monochromator are relatively fixed. When the liquid level is at a similar horizontal line to the detector, ultraviolet light source and monochromator, firstly, the minute fluctuations of the liquid level will cause frequent changes in the incident angle and optical path of the light, resulting in large fluctuations in the detection results. Secondly, refraction and reflection phenomena will occur at the liquid level. When the light approaches the liquid level, the incident angle will change greatly, resulting in the path of the refracted light deviating from the expectation, so that the light cannot accurately pass through the liquid in the sample cell, affecting the interaction between the light and the heavy metals in the sample, and further affecting the accuracy of the detection results. Therefore, we propose an apparatus for analyzing and detecting heavy metals in lake bottom sludge. Summary of the Invention

[0004] The purpose of the present invention is to provide an apparatus for analyzing and detecting heavy metals in lake bottom sludge to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An apparatus for analyzing and detecting heavy metals in lake bottom sludge, comprising:

[0006] Detection box body, a protective door is hinged to the front side of the detection box body, a display for detection and display is arranged on the protective door, a sample cell for optically analyzing and detecting heavy metals in lake bottom sludge, a detector for detecting optical signals, and a transmitting and processing component for light source emission and processing are arranged inside the detection box body. The sample cell is fixed inside the detection box body, the detector and the transmitting and processing component are located on both sides of the sample cell. The transmitting and processing component includes an installation box, and an ultraviolet light source and a monochromator are installed on the installation box. A signal processing component is arranged inside the detection box body, and the signal processing component is electrically connected to the detector and the display. It further includes:

[0007] Two groups of installation slide rails arranged inside the detection box body, the installation slide rails are symmetrically arranged on both sides of the sample cell, a U-shaped plate for assisting synchronous lifting movement is fixed between the two groups of installation slide rails, a sliding component for slidably connecting with the U-shaped plate is arranged on the outer side of the sample cell, an installation limiting component for assisting in installing and limiting the detector or the transmitting and processing component is arranged on the installation slide rail, a liquid supply component for supplying the treated sludge heavy metal solution is arranged between the detection box body and the sample cell, a pressure supply component for pressurizing the sludge heavy metal solution inside the sample cell is arranged inside the sample cell, and a lifting component for lifting the two groups of installation slide rails during liquid supply is arranged on the sample cell.

[0008] Preferably, the liquid supply component includes a delivery pipe installed on the detection box body and the sample cell, one end of the delivery pipe is communicated with the inner bottom of the sample cell, a control valve for controlling the start and stop of the delivery is installed on the delivery pipe, a piston plate slidably connected with the inner cavity of the sample cell is arranged inside the sample cell, and a sealing component for sealing is arranged between the piston plate and the inside of the sample cell.

[0009] Preferably, the lifting component includes a gear arranged inside the detection box body, a connecting component for assisting in connecting the gear and the U-shaped plate is arranged between the gear and the U-shaped plate, a fixed rack is fixed on the outer side of the sample cell, a driving rack is arranged inside the detection box body, the gear is located between the fixed rack and the driving rack, and the gear, the fixed rack and the driving rack are meshed with each other. A driving component for assisting in transmission is arranged between the piston plate and the driving rack.

[0010] Preferably, the driving component includes an L-shaped plate arranged on the outer side of the sample cell, a connecting plate is fixed on the L-shaped plate, the driving rack is fixed at the lower end of the connecting plate, a plurality of sliding rods are slidably connected to the upper end of the sample cell, and both ends of the sliding rods are respectively connected and fixed to the piston plate and the L-shaped plate.

[0011] Preferably, the connecting component includes a fixing rod fixed on the U-shaped plate, a U-shaped frame fixed on the fixing rod, a rotating shaft rotatably connected to the U-shaped frame, and the gear is centrally fixed on the rotating shaft.

[0012] Preferably, the sliding component includes two groups of fixing blocks symmetrically fixed on the outside of the sample cell, a T-shaped rod is slidably connected to the two groups of fixing blocks, and one end of the T-shaped rod is fixed to the U-shaped plate.

[0013] Preferably, the sealing component includes an annular groove opened on the outside of the piston plate, a sealing strip is installed inside the annular groove, and the sealing strip is arranged in contact with the inner wall of the sample cell.

[0014] Preferably, the pressure supply component includes a gravity cylinder arranged inside the sample cell, the gravity cylinder is located above the piston plate and is fixedly connected through a connecting rod, and a gravity block is placed inside the gravity cylinder.

[0015] Preferably, the installation limiting component includes a chute opened on the installation slide rail, an installation frame for clamping and fixing the detector or the transmitting and processing component is slidably connected to the chute, installation frames are fixed on both sides of the installation frame, threaded pins are threadedly engaged through threaded holes on the installation frames, and after the detector, the ultraviolet light source and the monochromator are installed, they are on the same straight line on the horizontal side.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] In the process of analyzing and detecting heavy metals in lake bottom sludge by means of ultraviolet light irradiation in the present invention, through the mutual cooperation of the liquid supply component, the lifting component and the transmission component, the detector, the ultraviolet light source and the monochromator are always in the middle position of the liquid as the liquid level of the heavy metal solution in the sample cell rises. By controlling the detection position, the influence of the liquid level on the light irradiation during the detection process is reduced, the detection accuracy is ensured, and during the detection process, through the pressure supply component, an extrusion force is generated on the liquid level of the heavy metal solution in the sample cell, reducing the amplitude of the fluctuation of the heavy metal solution in the sludge, and further ensuring the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall external structure of the present invention;

[0019] Figure 2 is a schematic diagram of the internal structure of the detection box of the present invention;

[0020] Figure 3 is a schematic diagram of the sample cell and two groups of installation slide rails of the present invention;

[0021] Figure 4 is a schematic diagram of the installation limiting component of the present invention;

[0022] Figure 5 Schematic diagram of the emission processing component structure of the present invention;

[0023] Figure 6 Schematic diagram of the U-shaped plate and two groups of installation slide rails structure of the present invention;

[0024] Figure 7 Schematic diagram of the internal structure of the sample cell of the present invention;

[0025] Figure 8 Schematic diagram of the liquid supply component structure of the present invention;

[0026] Figure 9 Schematic diagram of the pressure supply component and the sealing component structure of the present invention;

[0027] Figure 10 Schematic diagram of the position relationship of the lifting component before liquid supply of the present invention;

[0028] Figure 11 Schematic diagram of the lifting component, transmission component and connection component structure of the present invention;

[0029] Figure 12 Schematic diagram of the state of the lifting component after transmission during the liquid supply process of the present invention.

[0030] In the figure: 101 - detection box; 102 - protective door; 103 - display; 104 - sample cell; 105 - detector; 1061 - installation box; 1062 - ultraviolet light source; 1063 - monochromator; 2 - installation slide rail; 3 - U-shaped plate; 401 - fixing block; 402 - T-shaped rod; 501 - chute; 502 - installation frame; 503 - installation rack; 504 - threaded pin; 601 - delivery pipe; 602 - control valve; 603 - piston plate; 701 - gravity cylinder; 702 - connecting rod; 703 - gravity block; 801 - annular groove; 802 - sealing strip; 901 - gear; 902 - fixed rack; 903 - transmission rack; 1001 - fixed rod; 1002 - U-shaped frame; 1003 - rotating shaft; 1101 - L-shaped plate; 1102 - connecting plate; 1103 - sliding rod. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. 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.

[0032] Embodiment 1

[0033] Please refer to Figures 1 - 12, A device for analyzing and detecting heavy metals in lake bottom sludge shown in the figure includes:

[0034] A detection box body 101, a protective door 102 is hinged on the front side of the detection box body 101, a display 103 for detection and display is arranged on the protective door 102, a sample cell 104 for optically analyzing and detecting heavy metals in lake bottom sludge, a detector 105 for detecting optical signals, and an emission processing component for light source emission processing are arranged inside the detection box body 101. The sample cell 104 is fixed inside the detection box body 101, the detector 105 and the emission processing component are located on both sides of the sample cell 104. The emission processing component includes an installation box 1061, an ultraviolet light source 1062 and a monochromator 1063 are installed on the installation box 1061. A signal processing component is arranged inside the detection box body 101, and the signal processing component is electrically connected between the detector 105 and the display 103;

[0035] It should be noted here that: after the sludge heavy metal solution is transported, the detector 105, the ultraviolet light source 1062 and the monochromator 1063 are started. The ultraviolet light source 1062 provides light source and the monochromator 1063 decomposes the composite light emitted by the ultraviolet light source 1062 into monochromatic light and irradiates the sludge heavy metal solution inside the sample cell 104. The detector 105 receives the light passing through the sample cell 104, converts the optical signal into an electrical signal, and then the signal processing component processes and analyzes the electrical signal transmitted by the detector 105 and uses the display 103 to display the data, completing the analysis and detection of heavy metals in lake bottom sludge by ultraviolet light irradiation;

[0036] It is worth noting here that: the detector 105, the sample cell 104, the ultraviolet light source 1062, the monochromator 1063, the signal processing component and the display 103 are conventional operating components in the process of analyzing and detecting heavy metals in lake bottom sludge by ultraviolet light irradiation. Their working principles, installation and operation methods are regarded as prior art in this application and will not be elaborated here;

[0037] It further includes:

[0038] Two sets of installation slide rails 2 are arranged inside the detection box body 101. The installation slide rails 2 are symmetrically arranged on both sides of the sample cell 104. A U-shaped plate 3 for assisting synchronous lifting movement is fixed between the two sets of installation slide rails 2. A sliding assembly for slidably connecting the U-shaped plate 3 is arranged on the outer side of the sample cell 104. An installation limit assembly for assisting the installation and limiting of the detector 105 or the emission processing component is arranged on the installation slide rail 2. A liquid supply assembly for supplying the treated sludge heavy metal solution is arranged between the detection box body 101 and the sample cell 104. A pressure supply assembly for pressurizing the sludge heavy metal solution inside the sample cell 104 is arranged inside the sample cell 104. A lifting assembly for lifting the two sets of installation slide rails 2 during the liquid supply process is arranged on the sample cell 104;

[0039] It should be noted here that: during the process of analyzing and detecting the heavy metals in the lake bottom sludge by means of ultraviolet light irradiation, through the mutual cooperation of the liquid supply assembly, the lifting assembly and the transmission assembly, the detector 105, the ultraviolet light source 1062 and the monochromator 1063 are always in the middle position of the liquid as the liquid level of the sludge heavy metal solution inside the sample cell 104 rises. By controlling the detection position, the influence of the liquid surface on the light irradiation during the detection is reduced, and the accuracy of the detection is ensured. Moreover, during the detection process, through the pressure supply assembly, an extrusion force is generated on the liquid level of the sludge heavy metal solution inside the sample cell 104, and the amplitude of the fluctuation of the sludge heavy metal solution is reduced, further ensuring the accuracy of the detection.

[0040] Preferably, the liquid supply assembly includes a delivery pipe 601 installed on the detection box body 101 and the sample cell 104. One end of the delivery pipe 601 is connected to communicate with the inner bottom of the sample cell 104. A control valve 602 for controlling the start and stop of the delivery is installed on the delivery pipe 601. A piston plate 603 that is slidably connected to the inside of the sample cell 104 and is arranged to match the inner cavity thereof is arranged inside the sample cell 104. A sealing assembly for sealing is arranged between the piston plate 603 and the inside of the sample cell 104;

[0041] It should be noted here that: the sludge heavy metal solution is placed in an external liquid delivery device and one end of the external liquid delivery device is installed and connected to one end of the delivery pipe 601. After installation, the sludge heavy metal solution is delivered to the inside of the sample cell 104 through the delivery pipe 601 under the driving action of the liquid delivery device. After the sludge heavy metal solution is delivered, the control valve 602 is closed and the detector 105, the ultraviolet light source 1062 and the monochromator 1063 are started.

[0042] Preferably, the lifting assembly includes a gear 901 disposed inside the detection box body 101. A connecting assembly for assisting in connecting the gear 901 is provided between the gear 901 and the U-shaped plate 3. A fixed rack 902 is fixed to the outside of the sample cell 104. A driving rack 903 is disposed inside the detection box body 101. The gear 901 is located between the fixed rack 902 and the driving rack 903, and the gear 901, the fixed rack 902, and the driving rack 903 are meshed with each other. A transmission assembly for assisting in transmission is provided between the piston plate 603 and the driving rack 903;

[0043] It should be noted here that: through transmission, the driving rack 903 is driven to move upward synchronously. During the movement of the driving rack 903, through the meshing transmission between the driving rack 903 and the gear 901 and the meshing transmission between the gear 901 and the fixed rack 902, the gear 901 rotates and moves upward at the same time. During the upward movement of the gear 901, through the connection of the connecting assembly and the U-shaped plate 3, the two mounting slide rails 2 are driven to move upward. Through the movement of the two mounting slide rails 2, the detector 105, the ultraviolet light source 1062, and the monochromator 1063 are driven to move upward and maintain the same horizontal line. During the upward movement, when the driving rack 903 moves upward by a distance of L, the meshing point of the gear 901 and the driving rack 903 is set as A, and the meshing point with the fixed rack 902 is set as B. Taking point B as the relatively static reference point, since the fixed rack 902 does not move, the gear 901 will have a tendency to rotate around point B. From the perspective of circular motion analysis, point A moves a distance of L along with the driving rack 903, and points A and B are at both ends of the same diameter on the gear 901. According to the properties of circular motion, the linear velocity magnitudes of the two endpoints of the diameter are equal and the directions are opposite during the rotation of the gear 901. The linear velocity of point A moving is equal to the linear velocity of point B relative to point A. Since point B is relatively static, the distance that the center of the gear 901 moves relative to point A is half of L. Therefore, when the piston plate 603 and the driving rack 903 move upward, the gear 901, the U-shaped plate 3, and the mounting slide rails 2 are driven to move upward by half of the distance, so that the detector 105, the ultraviolet light source 1062, and the monochromator 1063 are located at the middle position of the sludge heavy metal solution inside the sample cell 104;

[0044] It should be noted here that: the modulus and number of teeth of the gear 901, the fixed rack 902, and the driving rack 903 are matched to ensure good meshing transmission.

[0045] Preferably, the transmission assembly includes an L-shaped plate 1101 disposed outside the sample cell 104. A connecting plate 1102 is fixed on the L-shaped plate 1101. The transmission rack 903 is fixed to the lower end of the connecting plate 1102. A plurality of sliding rods 1103 are slidably connected to the upper end of the sample cell 104. Both ends of the sliding rod 1103 are fixedly connected to the piston plate 603 and the L-shaped plate 1101 respectively;

[0046] It should be noted here that: during the process of transporting the sludge heavy metal solution into the sample cell 104 through the delivery pipe 601, due to the pressure exerted by the sludge heavy metal solution inside the sample cell 104 on the piston plate 603, the piston plate 603 is pushed to move upward synchronously with the transportation of the sludge heavy metal solution. During the upward movement of the piston plate 603, through the connection of the sliding rod 1103, the L-shaped plate 1101 and the connecting plate 1102, the transmission rack 903 is driven to move upward synchronously.

[0047] Preferably, the connection assembly includes a fixed rod 1001 fixed to the U-shaped plate 3. A U-shaped frame 1002 is fixed on the fixed rod 1001. A rotating shaft 1003 is rotatably connected to the U-shaped frame 1002. The gear 901 is centrally fixed on the rotating shaft 1003;

[0048] It should be noted here that: through the fixed rod 1001, the U-shaped frame 1002 and the rotating shaft 1003, the rotatable connection of the gear 901 is facilitated.

[0049] Preferably, the sliding assembly includes two fixed blocks 401 symmetrically fixed outside the sample cell 104. A T-shaped rod 402 is slidably connected to the two fixed blocks 401. One end of the T-shaped rod 402 is fixed to the U-shaped plate 3;

[0050] It should be noted here that: through the fixed block 401 and the T-shaped rod 402, the movement of the U-shaped plate 3 after being stressed is guided.

[0051] Preferably, the sealing assembly includes an annular groove 801 formed on the outside of the piston plate 603. A sealing strip 802 is installed inside the annular groove 801. The sealing strip 802 is in contact with the inner wall of the sample cell 104;

[0052] It should be noted here that: through the sealing strip 802 inside the annular groove 801, the sealing between the piston plate 603 and the inside of the sample cell 104 is facilitated.

[0053] Preferably, the pressure supply assembly includes a gravity cylinder 701 disposed inside the sample cell 104. The gravity cylinder 701 is located above the piston plate 603 and is fixedly connected through a connecting rod 702. A gravity block 703 is placed inside the gravity cylinder 701;

[0054] It should be noted here that after the sludge heavy metal solution is transported into the interior of the sample cell 104 through the delivery pipe 601, the gravity of the gravity cylinder 701 and the gravity block 703 on the pressure supply assembly and the connection of the connecting rod 702 and the piston plate 603 generate a squeezing force on the liquid level of the sludge heavy metal solution inside the sample cell 104, reducing the amplitude of fluctuations of the sludge heavy metal solution and further ensuring the accuracy of detection.

[0055] Preferably, the installation limiting assembly includes a chute 501 formed on the installation slide rail 2. A mounting frame 502 for clamping and fixing the detector 105 or the emission processing component is slidably connected to the chute 501. Mounting brackets 503 are fixed on both sides of the mounting frame 502. A threaded pin 504 is threadedly engaged with the mounting brackets 503 through threaded holes. After the detector 105, the ultraviolet light source 1062, and the monochromator 1063 are installed, they are on the same straight line on the horizontal side.

[0056] It should be noted here that the detector 105 or the emission processing component is clamped and fixed on the mounting frame 502. After installation, through the sliding action of the mounting frame 502 inside the chute 501, the use position of the detector 105 or the emission processing component after installation is adjusted. After the adjustment is completed, the threaded pin 504 is rotated. During the rotation, one end of the threaded pin 504 abuts against the installation slide rail 2 to limit and fix the position of the adjusted mounting frame 502.

[0057] In this solution: A device for analyzing and detecting heavy metals in lake bottom sludge includes the following steps:

[0058] During the process of analyzing and detecting heavy metals in lake bottom sludge by ultraviolet light irradiation, first, the lake bottom sludge is processed. During the processing, a professional sludge sampler is used to collect representative lake bottom sludge samples at different regions and depths of the lake to ensure that the samples can reflect the heavy metal content of the entire lake bottom sludge. After collection, the collected sludge samples are placed in a well-ventilated environment to air-dry naturally or dried in a low-temperature oven to remove the moisture. The dried samples are ground into fine powder with a mortar and then sieved to make the sample particles uniform for subsequent analysis. Weigh the sieved samples, add digestion reagents (nitric acid, hydrochloric acid, hydrofluoric acid) to convert the heavy metal elements in the sludge into ionic state so that they can dissolve in the solution and make a sludge heavy metal solution.

[0059] After the preparation of the sludge heavy metal solution, place the sludge heavy metal solution in an external liquid delivery device and connect one end of the external liquid delivery device to one end of the delivery pipe 601. After installation, drive the sludge heavy metal solution through the delivery pipe 601 into the interior of the sample cell 104 by the driving action of the liquid delivery device. After the sludge heavy metal solution is delivered, close the control valve 602 and start the detector 105, the ultraviolet light source 1062, and the monochromator 1063. Provide light through the ultraviolet light source 1062 and decompose the composite light emitted by the ultraviolet light source 1062 into monochromatic light by the monochromator 1063 and irradiate the sludge heavy metal solution inside the sample cell 104. The detector 105 receives the light passing through the sample cell 104, converts the optical signal into an electrical signal, and then processes and analyzes the electrical signal transmitted by the detector 105 through the signal processing component and uses the display 103 for data display, completing the analysis and detection of heavy metals in lake bottom sludge by ultraviolet light irradiation;

[0060] During the process of transporting the sludge heavy metal solution through the delivery pipe 601 to the inside of the sample cell 104, due to the pressure exerted by the sludge heavy metal solution inside the sample cell 104 on the piston plate 603, the piston plate 603 is pushed to move upward synchronously with the transportation of the sludge heavy metal solution. During the upward movement of the piston plate 603, through the connection of the slide bar 1103, the L-shaped plate 1101, and the connecting plate 1102, the transmission rack 903 is driven to move upward synchronously. During the movement of the transmission rack 903, through the meshing transmission between the transmission rack 903 and the gear 901 and the meshing transmission between the gear 901 and the fixed rack 902, the gear 901 rotates and moves upward simultaneously. During the upward movement of the gear 901, through the connection of the connection component and the U-shaped plate 3, the two mounting slide rails 2 are driven to move upward. Through the movement of the two mounting slide rails 2, the detector 105, the ultraviolet light source 1062, and the monochromator 1063 are driven to move upward and maintain the same horizontal line. During the upward movement, when the upward movement distance of the transmission rack 903 is L, the meshing point of the gear 901 and the transmission rack 903 is set as A, and the meshing point with the fixed rack 902 is set as B. Taking point B as the relatively static reference point, since the fixed rack 902 does not move, the gear 901 will tend to rotate around point B. Analyzing from the perspective of circular motion, point A moves a distance of L along with the transmission rack 903, and points A and B are at both ends of the same diameter on the gear 901. According to the properties of circular motion, the linear velocity magnitudes of the two endpoints of the diameter are equal and the directions are opposite during the rotation of the gear 901. Therefore, the linear velocity of point A's movement is equal to the linear velocity of point B relative to point A. Since point B is relatively static, the distance that the center of the gear 901 moves relative to point A is half of L. Therefore, when the piston plate 603 and the transmission rack 903 move upward, the gear 901, the U-shaped plate 3, and the mounting slide rail 2 are driven to move upward by half of the distance, so that the detector 105, the ultraviolet light source 1062, and the monochromator 1063 are located at the middle position of the sludge heavy metal solution inside the sample cell 104 (see Figure 12 the state), through the control of the position, the influence of the liquid surface on the light irradiation during the detection is reduced, ensuring the accuracy of the detection;

[0061] After the sludge heavy metal solution is transported through the delivery pipe 601 to the inside of the sample cell 104, through the pressure exerted by the pressure supply component on the piston plate 603 and the connection of the piston plate 603, an extrusion pressure is generated on the liquid surface of the sludge heavy metal solution inside the sample cell 104, reducing the amplitude of the fluctuation of the sludge heavy metal solution, and further ensuring the accuracy of the detection.

[0062] It should be noted that, in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0063] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for analyzing and detecting heavy metals in lake bottom sludge, comprising: A detection box body (101), a protective door (102) is hinged on the front side of the detection box body (101), a display (103) for detection and display is arranged on the protective door (102), a sample pool (104) for optically analyzing and detecting heavy metals in lake bottom sludge, a detector (105) for detecting optical signals, and an emission processing component for light source emission processing are arranged inside the detection box body (101). The sample pool (104) is fixed inside the detection box body (101), the detector (105) and the emission processing component are located on both sides of the sample pool (104). The emission processing component includes an installation box (1061), an ultraviolet light source (1062) and a monochromator (1063) are installed on the installation box (1061). A signal processing component is arranged inside the detection box body (101), and the signal processing component is electrically connected between the detector (105) and the display (103); It is characterized in that it further includes: Two groups of installation slide rails (2) arranged inside the detection box body (101), the installation slide rails (2) are symmetrically arranged on both sides of the sample pool (104), a U-shaped plate (3) for assisting synchronous lifting movement is fixed between the two groups of installation slide rails (2), a sliding component for slidingly connecting with the U-shaped plate (3) is arranged on the outer side of the sample pool (104), an installation limiting component for assisting the installation and limiting of the detector (105) or the emission processing component is arranged on the installation slide rails (2), a liquid supply component for supplying the treated sludge heavy metal solution is arranged between the detection box body (101) and the sample pool (104), a liquid pressure supply component for supplying pressure to the sludge heavy metal solution inside the sample pool (104) is arranged inside the sample pool (104), and a lifting component for lifting the two groups of installation slide rails (2) during the liquid supply process is arranged on the sample pool (104).

2. The heavy metal analysis and detection device for lake bottom sludge according to claim 1, characterized in that: The liquid supply component includes a delivery pipe (601) installed on the detection box body (101) and the sample pool (104), one end of the delivery pipe (601) is communicated with the inner bottom of the sample pool (104), a control valve (602) for controlling the start and stop of the delivery is installed on the delivery pipe (601), a piston plate (603) that is slidingly connected with the inner cavity of the sample pool (104) and is arranged to match the inner cavity is arranged inside the sample pool (104), and a sealing component for sealing is arranged between the piston plate (603) and the inside of the sample pool (104).

3. The heavy metal analysis and detection device for lake bottom sludge according to claim 2, characterized in that: The lifting assembly includes a gear (901) disposed inside the detection box body (101). A connection assembly for assisting in connecting the gear (901) is provided between the gear (901) and the U-shaped plate (3). A fixed rack (902) is fixed to the outer side of the sample cell (104). A transmission rack (903) is disposed inside the detection box body (101). The gear (901) is located between the fixed rack (902) and the transmission rack (903), and the gear (901), the fixed rack (902), and the transmission rack (903) are meshed with each other. A transmission assembly for assisting in transmission is provided between the piston plate (603) and the transmission rack (903).

4. The heavy metal analysis and detection device for lake bottom sludge according to claim 3, characterized in that: The transmission assembly includes an L-shaped plate (1101) disposed outside the sample cell (104). A connection plate (1102) is fixed to the L-shaped plate (1101). The transmission rack (903) is fixed to the lower end of the connection plate (1102). A plurality of sets of sliding rods (1103) are slidably connected to the upper end of the sample cell (104). Both ends of the sliding rod (1103) are fixedly connected to the piston plate (603) and the L-shaped plate (1101) respectively.

5. The heavy metal analysis and detection device for lake bottom sludge according to claim 4, characterized in that: The connection assembly includes a fixed rod (1001) fixed to the U-shaped plate (3). A U-shaped frame (1002) is fixed to the fixed rod (1001). A rotating shaft (1003) is rotatably connected to the U-shaped frame (1002). The gear (901) is centrally fixed to the rotating shaft (1003).

6. The heavy metal analysis and detection device for lake bottom sludge according to claim 1, wherein: The sliding assembly includes two sets of fixed blocks (401) symmetrically fixed to the outer side of the sample cell (104). A T-shaped rod (402) is slidably connected to the two sets of fixed blocks (401). One end of the T-shaped rod (402) is fixed to the U-shaped plate (3).

7. The heavy metal analysis and detection device for lake bottom sludge according to claim 2, wherein: The sealing assembly includes an annular groove (801) formed on the outer side of the piston plate (603). A sealing strip (802) is installed inside the annular groove (801). The sealing strip (802) abuts against the inner wall of the sample cell (104).

8. The heavy metal analysis and detection device for lake bottom sludge according to claim 1, characterized in that: The pressure supply assembly includes a gravity cylinder (701) disposed inside the sample cell (104). The gravity cylinder (701) is located above the piston plate (603) and is fixedly connected through a connecting rod (702). A gravity block (703) is placed inside the gravity cylinder (701).

9. The heavy metal analysis and detection device for lake bottom sludge according to claim 1, wherein: The installation and limiting assembly includes a chute (501) formed on the installation slide rail (2). An installation frame (502) for clamping and fixing the detector (105) or the emission and processing component is slidably connected to the chute (501). Installation frames (503) are fixed to both sides of the installation frame (502). A threaded pin (504) is threadedly engaged with the installation frame (503) through a threaded hole. After the detector (105), the ultraviolet light source (1062), and the monochromator (1063) are installed, they are on the same straight line on the horizontal side.

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