DPD residual chlorine analyzer with automatic chlorine adding mechanism

Abstract

The invention relates to the field of residual chlorine analyzers, and discloses a DPD residual chlorine analyzer with an automatic chlorine adding mechanism, the DPD residual chlorine analyzer comprises a shell, a locking mechanism is arranged at the lower part of the interior of the shell, two groups of liquid storage mechanisms are arranged in the locking mechanism, the locking mechanism comprises a fixing assembly arranged at the lower part of the interior of the shell, the liquid storage mechanism comprises a shell, a fixing assembly is arranged in the shell, a locking plate assembly is arranged on one side of the fixing assembly, three sets of locking assemblies are arranged above the fixing assembly, and four sets of vibration assemblies are arranged on the side, away from the locking plate assembly, of the fixing assembly. A fixed long rod is driven by a second motor to intermittently rotate, so that a triangular extrusion block periodically collides with a triangular fixed block, the whole fixed frame is driven to vibrate, tiny bubbles generated by stirring in an internal reagent are promoted to be broken, sharp reading fluctuation and measurement errors after the bubbles enter a colorimetric pool are avoided, and the accuracy of a residual chlorine value is ensured.

Description

Technical Field

[0001] This invention relates to the field of residual chlorine analyzer technology, specifically to a DPD residual chlorine analyzer with an automatic chlorination mechanism. Background Technology

[0002] The patent application with publication number CN209707488U includes an instrument case comprising a front panel and a rear panel. The front panel has a slot on its side, and the rear panel has a pin on its side. The pin is installed inside the slot, and the front and rear panels are connected via the pin and slot. The upper and lower sides of the rear panel are integrally formed with fixing plates, each containing mounting screws. The fixing plates on both sides of the rear panel are axially symmetrically distributed. The front and rear panels are connected using slots, pins, clips, and grooves. During use, opening the front panel reveals the power and signal cable terminals, facilitating maintenance and repair of the residual chlorine analyzer and improving the accuracy and lifespan of the monitoring data.

[0003] In the aforementioned patents, some existing devices are prone to precipitation or stratification of DPD reagents and buffer reagents during long-term operation, resulting in uneven reagent concentrations. When the reagents are drawn into the reaction cell, the concentration difference directly affects the completeness and consistency of the colorimetric reaction, thus introducing measurement errors. Secondly, tiny air bubbles are easily mixed into the reagents during stirring or transportation. After these air bubbles enter the optical path of the photometer, they will cause drastic fluctuations in absorbance readings due to scattering, generating noise signals. In severe cases, this can even cause false alarms or incorrect data recordings. In addition, changes in ambient temperature will affect the rate of chemical reactions. Temperature fluctuations will cause absorbance values ​​at the same concentration to drift, reducing the long-term stability and reliability of the instrument. Summary of the Invention

[0004] The purpose of this invention is to provide a DPD residual chlorine analyzer with an automatic chlorination mechanism to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is: a DPD residual chlorine analyzer with an automatic chlorination mechanism, comprising a housing, a locking mechanism disposed at the lower part of the housing, two sets of liquid storage mechanisms disposed within the locking mechanism, the locking mechanism including a fixing component disposed at the lower part of the housing, a locking plate assembly disposed on one side of the fixing component, three sets of locking components disposed above the fixing component, and four sets of vibration components disposed on the side of the fixing component away from the locking plate assembly; The fixing assembly includes three E-shaped horizontal plates disposed inside the housing. The three E-shaped horizontal plates are arranged sequentially from top to bottom along the height direction of the housing: a first E-shaped horizontal plate, a second E-shaped horizontal plate, and a third E-shaped horizontal plate. Each E-shaped horizontal plate consists of a horizontal plate and three horizontal bars. Slots are provided on the three horizontal bars of the three E-shaped horizontal plates. A heating plate is fixedly connected between the three horizontal bars on two adjacent E-shaped horizontal plates.

[0006] Preferably, the locking plate assembly includes three insert plates, which correspond to three sets of E-shaped horizontal plates. Multiple fixed vertical rods are fixedly connected between two adjacent insert plates, and multiple L-shaped plates are fixedly connected to the upper end of the uppermost insert plate.

[0007] Preferably, the locking assembly includes sliding grooves on three horizontal bars respectively formed on the uppermost E-shaped horizontal plate, with sliding blocks slidably connected in each of the three sliding grooves, a connecting block fixedly connected to the upper end of each sliding block, a protrusion fixedly connected to the upper side of one side of each connecting block, a first spring fixedly connected to the end of the connecting block away from the protrusion, a fixed vertical block fixedly connected to the other end of the first spring, and the fixed vertical block fixedly connected to the upper end of the E-shaped horizontal plate.

[0008] Preferably, the vibration assembly includes two sets of vibration assemblies disposed between two adjacent E-shaped horizontal plates. The two sets of vibration assemblies include a fixed frame disposed between two adjacent heating plates. Two connecting support rods are fixedly connected to the outside of the fixed frame, and the other ends of the two connecting support rods are fixedly connected to one side of the heating plate.

[0009] Preferably, a plurality of triangular fixing blocks are fixedly connected inside the fixing frame, and two fixing rods are fixedly connected to the outside of the fixing blocks. A sliding cavity is opened inside the fixing rod, and a second spring is fixedly connected to the inner wall of the sliding cavity on the fixing rod. A sliding plate is fixedly connected to the other end of the second spring, and a triangular pressing block is fixedly connected to the side of the sliding plate away from the second spring. The sliding plate is slidably connected in the sliding cavity on the fixing rod, and the triangular pressing block corresponds to the triangular fixing block.

[0010] Preferably, the housing has a first mounting cavity and a second mounting cavity. The first mounting cavity is located at the upper part of the housing, and the second mounting cavity is located at the lower part of the housing. A control component is fixedly connected inside the first mounting cavity. Two guide tubes are provided on one side of the control component. The two sets of guide tubes correspond to two liquid storage mechanisms respectively. A first rotating door is rotatably connected to the upper side of the housing, and a second rotating door is rotatably connected to the lower side of the housing. Two sets of drive components are provided at the lower part of the second mounting cavity.

[0011] Preferably, the drive assembly includes a first motor fixedly disposed inside the lower part of the housing, and a rotating blade is fixedly connected to the output end of the first motor.

[0012] Preferably, the two sets of liquid storage mechanisms are respectively arranged between the adjacent crossbars of the three sets of E-shaped horizontal plates, and a cover plate assembly is provided above the liquid storage assembly.

[0013] Preferably, the liquid storage assembly includes a liquid storage shell, a fixing ring is fixedly connected to the upper end of the liquid storage shell, a sealing rubber ring is fixedly connected to the outside of the fixing ring, a groove is formed at the bottom of the liquid storage shell, a glass plate is fixedly connected between the groove and the internal cavity of the liquid storage shell, a fixing disk is fixedly connected to the upper end of the glass plate, a rotating disk is rotatably connected to the outside of the fixing disk, and a plurality of stirring blades are fixedly arranged on the outside of the rotating disk, with the groove corresponding to the rotating blades.

[0014] Preferably, the cover plate assembly includes a cover plate disposed outside the fixing ring, the cover plate having a through hole corresponding to the guide pipe, and an exhaust pump fixedly connected above the cover plate.

[0015] Compared with the prior art, the technical solution of the present invention has the following advantages: (1) This invention solves the problem of distorted detection results caused by reagent precipitation, bubble interference and temperature changes in traditional DPD residual chlorine analyzers during long-term operation by using a locking mechanism, vibration component and temperature control component. The locking plate component in the locking mechanism works with the locking component, inserting the plate into the slot and engaging with the protrusion to fix the liquid storage mechanism in a predetermined position in the housing, ensuring that the reagent bottle does not shake during operation. The fixed rod is driven by the second motor to rotate intermittently, causing the triangular extrusion block to periodically collide with the triangular fixed block. During the process, the second spring is continuously compressed and released, thereby causing the entire fixed frame to vibrate. The vibration energy is transmitted to the liquid storage shell through the heating plate, causing the tiny bubbles generated by stirring in the internal reagent to break, eliminating the risk of abnormal light scattering after the bubbles are pumped to the comparison cell by the water pump, avoiding drastic fluctuations in readings and measurement errors, and ensuring the accuracy of residual chlorine values. The heating plate set between adjacent E-shaped horizontal plates can heat the liquid storage shell at a constant temperature, keeping the reagent always in the optimal chemical reaction temperature range, eliminating the influence of ambient temperature fluctuations on the reaction rate and detection results, improving the accuracy of analysis, and is suitable for application scenarios that require long-term unattended monitoring. (2) This invention achieves non-contact stirring through the cooperation of the bottom structure of the liquid storage mechanism and the external drive component. Combined with the exhaust design, it avoids reagent deterioration. The bottom of the liquid storage shell of the liquid storage mechanism is provided with a groove, which is separated from the internal cavity by a thin glass plate. A rotating disk with stirring blades is rotatably connected above the thin glass plate, and the stirring blades are magnetic blades. The drive component inside the shell includes a first motor and a rotating blade. When the first motor drives the rotating blade to rotate, due to the magnetic coupling effect, the stirring blade inside the liquid storage shell rotates synchronously, which gently and thoroughly stirs the reagent, avoiding the risk of leakage caused by the aging of the mechanical transmission shaft seal, and ensuring the absolute airtightness of the reagent storage environment. At the same time, in each Before the first stirring, the exhaust pump on the cover plate assembly extracts excess gas from the liquid storage tank through the guide tube, effectively preventing gas from remaining in the tank. This is because if the liquid mixes with a large amount of air during stirring, reducing reagents such as DPD indicators can easily be oxidized by oxygen in the air, causing reagent failure. Pre-venting eliminates this potential hazard. Combined with stirring, it ensures a uniform concentration distribution of the buffer solution and indicator, avoiding the precipitation or stratification of solid particles after prolonged standing. Ultimately, the reagents extracted to the detection unit are always kept in an ideal state of freshness, homogeneity, and non-oxidation, extending the reagent replacement cycle, reducing maintenance costs, and ensuring the baseline stability of the analyzer during long-term operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the shell structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the housing of the present invention; Figure 4 This is a schematic diagram of the locking mechanism and liquid storage mechanism of the present invention; Figure 5 This is a schematic diagram of the locking mechanism structure of the present invention; Figure 6 This is a schematic diagram of the fixed component structure of the present invention; Figure 7 This is a schematic diagram of the vibration component structure of the present invention; Figure 8 This is a schematic diagram of a portion of the vibration component of the present invention; Figure 9 This is a schematic diagram of the locking component structure of the present invention; Figure 10 This is a schematic diagram of the locking component structure of the present invention; Figure 11 This is a schematic diagram of the locking plate assembly structure of the present invention; Figure 12 This is a schematic diagram of the liquid storage mechanism of the present invention; Figure 13This is a schematic diagram of the internal structure of the liquid storage shell of the present invention.

[0017] In the diagram: 1. Housing; 11. First rotating door; 12. Second rotating door; 13. First mounting cavity; 14. Second mounting cavity; 15. Drive assembly; 151. First motor; 152. Rotating blade; 16. Guide pipe; 17. Control assembly; 2. Locking mechanism; 21. Fixing assembly; 211. E-shaped horizontal plate; 212. Slot; 213. Heating plate; 22. Locking plate assembly; 221. Insert plate; 222. Fixing vertical rod; 223. L-shaped plate; 23. Locking assembly; 231. Sliding groove; 232. Sliding block; 233. Connecting block; 234. Protrusion; 235. Fixing vertical block; 236. 24. First spring; 24. Vibration assembly; 241. Connecting support rod; 242. Fixing frame; 243. Triangular fixing block; 244. Second motor; 245. Fixing block; 246. Fixing long rod; 247. Triangular pressing block; 248. Sliding plate; 249. Second spring; 3. Liquid storage mechanism; 31. Liquid storage assembly; 311. Liquid storage shell; 312. Fixing ring; 313. Sealing rubber ring; 314. Groove; 315. Glass sheet; 316. Fixing disk; 317. Rotating disk; 318. Stirring blade; 32. Cover plate assembly; 321. Cover plate; 322. Through hole; 323. Exhaust pump. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0019] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "comprising" or "including," and similar terms used in this disclosure, mean that an element or object preceding the term encompasses the elements or objects listed following the term and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0020] like Figures 1 to 13As shown, the present invention provides a DPD residual chlorine analyzer with an automatic chlorination mechanism, including a housing 1, a locking mechanism 2 disposed at the lower part of the housing 1, two sets of liquid storage mechanisms 3 disposed inside the locking mechanism 2, the locking mechanism 2 including a fixing component 21 disposed at the lower part of the housing 1, a locking plate component 22 disposed on one side of the fixing component 21, three sets of locking components 23 disposed above the fixing component 21, and four sets of vibration components 24 disposed on the side of the fixing component 21 away from the locking plate component 22. The fixing assembly 21 includes three E-shaped horizontal plates 211 disposed inside the housing 1. The three E-shaped horizontal plates 211 are arranged sequentially from top to bottom along the height direction of the housing 1 as a first E-shaped horizontal plate, a second E-shaped horizontal plate, and a third E-shaped horizontal plate. Each E-shaped horizontal plate 211 consists of a horizontal plate and three horizontal bars. Slots 212 are provided on the three horizontal bars of the three E-shaped horizontal plates 211. A heating plate 213 is fixedly connected between the three horizontal bars on two adjacent E-shaped horizontal plates 211.

[0021] The locking plate assembly 22 includes three insert plates 221, which correspond to three sets of E-shaped horizontal plates 211. Multiple fixed vertical rods 222 are fixedly connected between two adjacent insert plates 221, and multiple L-shaped plates 223 are fixedly connected to the upper end of the uppermost insert plate 221.

[0022] The locking assembly 23 includes sliding grooves 231 on three horizontal bars respectively opened on the uppermost E-shaped horizontal plate 211. Sliding blocks 232 are slidably connected in the three sliding grooves 231. A connecting block 233 is fixedly connected to the upper end of the sliding block 232. A protrusion 234 is fixedly connected to the upper side of one side of the connecting block 233. A first spring 236 is fixedly connected to the end of the connecting block 233 away from the protrusion 234. A fixing vertical block 235 is fixedly connected to the other end of the first spring 236. The fixing vertical block 235 is fixedly connected to the upper end of the E-shaped horizontal plate 211.

[0023] The vibration assembly 24 includes two sets of vibration assemblies 24 disposed between two adjacent E-shaped horizontal plates 211. The two sets of vibration assemblies 24 include a fixing frame 242 disposed between two adjacent heating plates 213 respectively. Two connecting support rods 241 are fixedly connected to the outside of the fixing frame 242. The other end of the two connecting support rods 241 is fixedly connected to one side of the heating plate 213 respectively.

[0024] Multiple triangular fixing blocks 243 are fixedly connected inside the fixing frame 242. A fixing block 245 is rotatably connected inside the fixing frame 242. The output end of the second motor 244 is fixedly connected to one side of the fixing block 245. The second motor 244 is fixed to the outside of the housing 1. Two fixing rods 246 are fixedly connected to the outside of the fixing block 245. A sliding cavity is opened inside the fixing rod 246. A second spring 249 is fixedly connected to the inner wall of the sliding cavity on the fixing rod 246. A sliding plate 248 is fixedly connected to the other end of the second spring 249. A triangular pressing block 247 is fixedly connected to the side of the sliding plate 248 away from the second spring 249. The sliding plate 248 is slidably connected to the sliding cavity on the fixing rod 246. The triangular pressing block 247 corresponds to the triangular fixing block 243.

[0025] The housing 1 has a first mounting cavity 13 and a second mounting cavity 14. The first mounting cavity 13 is located at the upper part of the housing 1, and the second mounting cavity 14 is located at the lower part of the housing 1. A control component 17 is fixedly connected inside the first mounting cavity 13. Two guide pipes 16 are provided on one side of the control component 17. The two sets of guide pipes 16 correspond to two liquid storage mechanisms 3 respectively. A first rotating door 11 is rotatably connected to the upper side of the housing 1, and a second rotating door 12 is rotatably connected to the lower side of the housing 1. Two sets of drive components 15 are provided at the lower part of the second mounting cavity 14. A water pump is provided inside the control component 17 and is connected to the guide pipes 16.

[0026] The drive assembly 15 includes a first motor 151 fixedly disposed inside the lower part of the housing 1, and a rotating blade 152 is fixedly connected to the output end of the first motor 151.

[0027] The two sets of liquid storage mechanisms 3 are respectively set between the adjacent crossbars of the three sets of E-shaped horizontal plates 211, and a cover plate assembly 32 is provided above the liquid storage assembly 31.

[0028] The liquid storage assembly 31 includes a liquid storage shell 311. A fixing ring 312 is fixedly connected to the upper end of the liquid storage shell 311. A sealing rubber ring 313 is fixedly connected to the outside of the fixing ring 312. A groove 314 is provided below the liquid storage shell 311. A glass plate 315 is fixedly connected between the groove 314 and the internal cavity of the liquid storage shell 311. A fixing disk 316 is fixedly connected to the upper end of the glass plate 315. A rotating disk 317 is rotatably connected to the outside of the fixing disk 316. Multiple stirring blades 318 are fixedly arranged on the outside of the rotating disk 317. The stirring blades 318 are magnetic blades. The stirring blades 318 correspond to the rotating blades 152. The groove 314 corresponds to the rotating blades 152.

[0029] The cover plate assembly 32 includes a cover plate 321 disposed outside the fixing ring 312. A through hole 322 is provided on the cover plate 321. The through hole 322 corresponds to the guide pipe 16. The guide pipe 16 passes through the through hole 322 and is fixedly connected to the through hole 322. An exhaust pump 323 is fixedly connected above the cover plate 321.

[0030] The working principle of the present invention is as follows: During use, the operator opens the second rotating door 12 and places the two sets of liquid storage mechanisms 3, which are used to store DPD indicator and buffer solution respectively, into the locking mechanism 2. The liquid storage shells 311 of the two sets of liquid storage mechanisms 3 are placed between the crossbars of the three E-shaped horizontal plates 211 respectively. The sealing rubber rings 313 on their fixing rings 312 are used to ensure the sealing with the cover plate 321. After the liquid storage shells 311 are placed; Insert the locking plate assembly 22. The three insert plates 221 are inserted into the slots 212 of the corresponding E-shaped horizontal plates 211. At this time, the insert plates 221 will push the protrusions 234 in the locking assembly 23 to move. After the protrusions 234 are pushed, they will drive the connecting block 233 and the sliding block 232 to slide in the sliding groove 231 and compress the first spring 236. When the insert plates 221 are fully in place, the first spring 236 will reset and push the protrusions 234 to lock the upper part of the insert plates 221. The L-shaped plate 223 will lock the upper part of the liquid storage shell 311, thereby firmly locking the liquid storage mechanism 3 in the shell 1 and preventing it from shaking during the operation or movement of the equipment. To prevent reagent precipitation, the first motor 151 drives the rotating blade 152 to rotate at a low speed. Since the rotating blade 152 corresponds to the stirring blade 318 at the bottom of the liquid storage mechanism 3, the stirring blade 318 rotates inside the liquid storage shell 311 through magnetic coupling to perform final stirring of the reagent and ensure uniform concentration. When the weather temperature is low, the first motor 151 drives the rotating blade 152 to rotate and stir the liquid. The heating plate 213 is located between the adjacent E-shaped horizontal plates 211 and begins to heat the liquid storage shell 311 at a constant temperature to ensure that the reagent works at the optimal reaction temperature, improve the accuracy of residual chlorine detection, and make the liquid uniformly heated. After the stirring of the liquid in the storage tank 311 is stopped, the output end of the second motor 244 drives the fixed rod 246 to rotate intermittently through the fixed block 245, so that the triangular extrusion block 247 periodically collides with the triangular fixed block 243. During the collision, the second spring 249 is compressed and released, causing the entire fixed frame 242 to generate high-frequency micro-vibration, which transmits the vibration energy to the heating plate 213, and then to the storage tank 311 of the storage mechanism 3. Through intermittent vibration, the bubbles in the internal reagent are quickly broken, preventing the bubbles from being drawn into the comparison cell by the water pump in the control component 17, causing light scattering and resulting in drastic fluctuations and errors in the readings. Before stirring the liquid in the storage tank 311, excess gas in the storage tank 311 is extracted to prevent excess gas in the storage tank 311 from mixing with the liquid when it is stirred, which could cause the liquid to be oxidized. When the reagent is used up, open the second rotating door 12, push the protrusion 234 to move, overcome the thrust of the first spring 236, and move the protrusion 234 away from the insert plate 221. Manually pull the L-shaped plate 223 of the locking plate assembly 22 upward to remove the insert plate assembly 22, thereby unlocking the device and taking out the empty liquid storage mechanism 3 for replacement or replenishment.

[0031] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

Claims

1. A DPD residual chlorine analyzer with an automatic chlorination mechanism, comprising a housing (1), wherein a locking mechanism (2) is provided at the lower part of the interior of the housing (1), and two sets of liquid storage mechanisms (3) are provided inside the locking mechanism (2), characterized in that: The locking mechanism (2) includes a fixing component (21) disposed inside the lower part of the housing (1), a locking plate component (22) disposed on one side of the fixing component (21), three sets of locking components (23) disposed above the fixing component (21), and four sets of vibration components (24) disposed on the side of the fixing component (21) away from the locking plate component (22). The fixing component (21) includes three E-shaped horizontal plates (211) disposed inside the housing (1). The three E-shaped horizontal plates (211) are arranged sequentially from top to bottom along the height direction of the cavity housing (1) as a first E-shaped horizontal plate, a second E-shaped horizontal plate, and a third E-shaped horizontal plate. Each E-shaped horizontal plate (211) consists of a horizontal plate and three horizontal bars. Slots (212) are provided on the three horizontal bars of the three E-shaped horizontal plates (211). A heating plate (213) is fixedly connected between the three horizontal bars on two adjacent E-shaped horizontal plates (211).

2. The DPD residual chlorine analyzer with an automatic chlorination mechanism according to claim 1, characterized in that: The locking plate assembly (22) includes three insert plates (221), which correspond to three sets of E-shaped horizontal plates (211). Multiple fixed vertical rods (222) are fixedly connected between two adjacent insert plates (221), and multiple L-shaped plates (223) are fixedly connected to the upper end of the uppermost insert plate (221).

3. A DPD residual chlorine analyzer with an automatic chlorination mechanism according to claim 2, characterized in that: The locking assembly (23) includes sliding grooves (231) on three horizontal bars respectively opened on the uppermost E-shaped horizontal plate (211). Sliding blocks (232) are slidably connected in the three sliding grooves (231). A connecting block (233) is fixedly connected to the upper end of the sliding block (232). A protrusion (234) is fixedly connected to the upper side of one side of the connecting block (233). A first spring (236) is fixedly connected to the end of the connecting block (233) away from the protrusion (234). A fixed vertical block (235) is fixedly connected to the other end of the first spring (236). The fixed vertical block (235) is fixedly connected to the upper end of the E-shaped horizontal plate (211).

4. A DPD residual chlorine analyzer with an automatic chlorination mechanism according to claim 3, characterized in that: The vibration assembly (24) includes two sets of vibration assemblies (24) disposed between two adjacent E-shaped horizontal plates (211). The two sets of vibration assemblies (24) include fixed frames (242) disposed between two adjacent heating plates (213). Two connecting support rods (241) are fixedly connected to the outside of the fixed frame (242), and the other ends of the two connecting support rods (241) are fixedly connected to one side of the heating plate (213).

5. A DPD residual chlorine analyzer with an automatic chlorination mechanism according to claim 4, characterized in that: Multiple triangular fixing blocks (243) are fixedly connected inside the fixing frame (242). A fixing block (245) is rotatably connected inside the fixing frame (242). Two fixing rods (246) are fixedly connected to the outside of the fixing block (245). A sliding cavity is opened inside the fixing rod (246). A second spring (249) is fixedly connected to the inner wall of the sliding cavity on the fixing rod (246). A sliding plate (248) is fixedly connected to the other end of the second spring (249). A triangular pressing block (247) is fixedly connected to the side of the sliding plate (248) away from the second spring (249). The sliding plate (248) is slidably connected in the sliding cavity on the fixing rod (246). The triangular pressing block (247) corresponds to the triangular fixing block (243).

6. A DPD residual chlorine analyzer with an automatic chlorination mechanism according to claim 1, characterized in that: The housing (1) has a first mounting cavity (13) and a second mounting cavity (14). The first mounting cavity (13) is located at the upper part of the housing (1), and the second mounting cavity (14) is located at the lower part of the housing (1). A control component (17) is fixedly connected inside the first mounting cavity (13). Two guide pipes (16) are provided on one side of the control component (17). The two sets of guide pipes (16) correspond to two liquid storage mechanisms (3) respectively. A first rotating door (11) is rotatably connected to the upper side of the housing (1), and a second rotating door (12) is rotatably connected to the lower side of the housing (1). Two sets of drive components (15) are provided at the lower part of the second mounting cavity (14).

7. A DPD residual chlorine analyzer with an automatic chlorination mechanism according to claim 6, characterized in that: The drive assembly (15) includes a first motor (151) fixedly disposed inside the lower part of the housing (1), and a rotating blade (152) is fixedly connected to the output end of the first motor (151).

8. A DPD residual chlorine analyzer with an automatic chlorination mechanism according to claim 7, characterized in that: The two sets of liquid storage mechanisms (3) are respectively set between the adjacent crossbars of the three sets of E-shaped crossbars (211) and a cover plate assembly (32) is provided above the liquid storage assembly (31).

9. A DPD residual chlorine analyzer with an automatic chlorination mechanism according to claim 8, characterized in that: The liquid storage assembly (31) includes a liquid storage shell (311), a fixing ring (312) is fixedly connected to the upper end of the liquid storage shell (311), a sealing rubber ring (313) is fixedly connected to the outside of the fixing ring (312), a groove (314) is provided below the liquid storage shell (311), a glass plate (315) is fixedly connected between the groove (314) and the internal cavity of the liquid storage shell (311), a fixing disk (316) is fixedly connected to the upper end of the glass plate (315), a rotating disk (317) is rotatably connected to the outside of the fixing disk (316), and a plurality of stirring blades (318) are fixedly provided on the outside of the rotating disk (317), and the groove (314) corresponds to the rotating blades (152).

10. A DPD residual chlorine analyzer with an automatic chlorination mechanism according to claim 9, characterized in that: The cover plate assembly (32) includes a cover plate (321) disposed outside the fixing ring (312), the cover plate (321) having a through hole (322) corresponding to the guide pipe (16), and an exhaust pump (323) fixedly connected above the cover plate (321).

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