Titration determination method of cupronickel detection degreaser and detection device of cupronickel detection degreaser

Abstract

The invention relates to the technical field of titration measurement, and discloses a titration determination method of a cupronickel detection degreasing agent and a detection device thereof, the device comprises a machine body, one side of the machine body is provided with a mounting rack, the mounting rack is fixedly connected with a bearing ring, one side of the bearing ring is fixedly connected with a tray through a rack body, and the tray is provided with a material conveying bottle; a fixedly-connected infusion tube is inserted into the top of the conveying bottle, a reagent bottle is clamped in the bearing ring, the end, away from the conveying bottle, of the infusion tube is inserted into one side of the top of the reagent bottle, the infusion tube is slidably connected with the reagent bottle, a drainage tube is fixedly connected to the bottom of the reagent bottle, and a mounting ring is fixedly connected into the reagent bottle; the titration detection device for the cupronickel detection degreaser is characterized in that a mounting ring is arranged in the middle of the liquid conveying pipe, a plurality of flow guide openings which are uniformly distributed are formed in the mounting ring, a limiting rod is slidably connected into the flow guide opening close to one side of the liquid conveying pipe, and a piston is fixedly connected to the top of the limiting rod. And reagent bottles need to be taken and turned over repeatedly.

Description

Technical Field

[0001] The present invention relates to the technical field of titration measurement, and specifically to a titration determination method and a detection device for a cupronickel detection degreasing agent. Background Art

[0002] The cupronickel degreasing agent is a cleaning agent specifically used to remove oil stains on the surface of cupronickel. In order to ensure issues such as the concentration, purity, and degreasing efficiency of the cupronickel degreasing agent, during the production of the cupronickel degreasing agent, it is usually necessary to detect the cupronickel degreasing agent. When detecting it, a titration detection method is usually used to ensure that it meets the production requirements and standards. When performing titration detection, a potentiometric titrator will be used. The potentiometric titrator is an instrument that uses the potentiometric titration method to determine the titration end point by measuring the potential change during the titration process. The potentiometric titrator usually consists of basic devices such as a burette, a titration cell, an indicator electrode, a reference electrode, a stirrer, and an instrument for measuring the electromotive force. During the titration detection process, first, an appropriate indicator electrode and reference electrode are selected to form a working battery with the solution to be measured. Then, the titrant is added. As the titrant is added, the concentration of the ion to be measured changes and the potential changes. Due to a chemical reaction, the potential of the indicator electrode also changes accordingly. Near the titration end point, the concentration of the ion to be measured undergoes a sudden change, causing a sudden jump in the electrode potential. At this time, the host can receive this information, and the situation of the cupronickel degreasing agent can be detected through this change. Before using the existing titration device, in order to remove impurities and residues, and balance the temperature to ensure that the concentration of the solution in the burette is the same as that in the reagent bottle, so as to accurately perform titration detection, it is usually necessary to first rinse the reagent bottle with the titrant, then pour out the titrant in the reagent bottle, and introduce a new titrant. This results in repeated operations of taking and turning the reagent bottle during specific operations. In actual operations, not only does it increase the operation steps of the staff, but also since the reagent bottle is generally made of glass, when repeatedly taking and turning the reagent bottle, it is easy to bump the reagent bottle against the device body, resulting in the problem of the reagent bottle being damaged. To avoid the occurrence of errors, for this reason, we propose a titration determination method and a detection device for a cupronickel detection degreasing agent. Summary of the Invention

[0003] The purpose of the present invention is to provide a titration determination method and a detection device for a cupronickel detection degreasing agent to solve the problems raised in the above background art.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a titration detection device for detecting a degreasing agent for white copper, comprising a body, a three-way valve fixedly connected to the top of the body, a burette body docked at the top of the body, a fixing frame fixedly connected to one side of the top of the body, a limiting frame slidably connected to the fixing frame, a titration pen and an electrode rod respectively clamped to the limiting frame, a mounting frame provided on one side of the body, a load-bearing ring fixedly connected to the mounting frame, and a tray fixedly connected to one side of the load-bearing ring through the frame; The bottle is placed on the tray, the top of the bottle is inserted with an infusion tube that is fixedly connected, the reagent bottle is clamped in the load-bearing ring, the end of the infusion tube away from the infusion bottle is inserted into the top side of the reagent bottle, the infusion tube is slidably connected to the reagent bottle, the bottom of the reagent bottle is fixedly connected with a discharge tube, the reagent bottle is fixedly connected with a mounting ring, a plurality of evenly distributed guide ports are opened on the mounting ring, and a limiting rod is slidably connected in the guide port close to one side of the infusion tube, the top of the limiting rod is fixedly connected with a piston, the piston is located in the infusion tube and slidably connected thereto, the bottom end of the limiting rod away from the piston is rotatably connected to a connecting rod, and the bottom end of the connecting rod away from the limiting rod is rotatably connected to the mounting rod; A sealing plug is slidably connected in the drainage pipe, the top of the sealing plug is in contact with the bottom end of the mounting rod, a plurality of evenly distributed liquid inlets are provided on the side of the sealing plug, and a plurality of drainage ports with the same number as the liquid inlets are provided on the bottom of the sealing plug, and the liquid inlets are all connected to the drainage ports on the same side.

[0005] Preferably, a limiting opening is provided on one side of the mounting frame, a plurality of clips are fixedly connected to the upper and lower sides of the limiting opening, and a rubber block is fixedly connected to one side of the clip close to the limiting opening.

[0006] Preferably, a liquid collecting box is fixedly connected to the mounting frame, the inner bottom wall of the liquid collecting box is rotatably connected to a screw rod, the bottom of the liquid collecting box is rotatably connected to a transmission rod, the rotating shaft end of the transmission rod is fixedly docked with the bottom end of the screw rod, the end of the transmission rod away from the screw rod is slidingly connected to the inner wall of the limit opening, the end of the transmission rod away from the screw rod is fixedly connected to the limit block, the top and bottom of the limit block are provided with limit grooves, and a torsion spring is fixedly connected between the bottom of the transmission rod close to one end of the screw rod and the inner bottom wall of the mounting frame.

[0007] Preferably, a threaded groove is provided at the bottom of the sealing plug, the screw rod is located in the threaded groove and is threadedly connected thereto, a magnet ring is fixedly connected to the top of the sealing plug, and the bottom end of the mounting rod is located in the magnet ring.

[0008] Preferably, a stirring platform is fixedly connected to one side of the top of the machine body close to the fixing frame, and a solution bottle is placed on the stirring platform.

[0009] Preferably, a burette sleeve is sleeved outside the burette body, and a connecting pipe A is fixedly connected between the top of the burette body and the three-way valve.

[0010] Preferably, a connecting pipe B is fixedly connected between the burette pen and the three-way valve, and a connecting pipe C is fixedly connected between the reagent bottle and the three-way valve.

[0011] Preferably, a feed hopper is fixedly connected to the top of the material conveying bottle, and a plurality of communication ports are formed in the top of the material conveying bottle.

[0012] Preferably, a docking pipe is fixedly connected to the top of the reagent bottle, and a visual filter is fixedly connected to one end of the docking pipe away from the reagent bottle.

[0013] A determination method for a titration detection device of a cupronickel detection degreasing agent specifically includes the following steps: S1: First, place the device at a designated working position, power on the device, then place the carbon dioxide absorbent in the visual filter, and then connect the material conveying bottle and the reagent bottle through an infusion tube. At this time, the lead screw will be inserted into the entrance of the thread groove at the bottom of the sealing plug to support the sealing plug, so that during the process of placing the reagent bottle, the sealing plug is supported by the lead screw, causing it to start rising. During this process, the sealing plug is pushed into the drain pipe, and the magnet ring is stuck at the bottom end of the mounting rod. As the sealing plug is pushed in, the sealing plug can push the piston into the infusion tube through the mounting rod. At this time, part of the air in the infusion tube is discharged through the material conveying bottle, and the inside of the infusion tube is in a negative pressure state. Then, an appropriate amount of titrant is loaded into the material conveying bottle through the feed hopper; S2: Afterwards, the staff can move the limit block along the limit opening. During the movement, the transmission rod can be driven to rotate, and the transmission rod can be used to drive the torsion spring to tighten. In this process, the transmission rod can drive the screw rod to rotate, and the screw rod can drive the sealing plug to descend during the rotation. When the limit block is rotated between the first set of clips, the rubber block is stuck in the limit groove of the limit block, which can limit the limit block and keep the sealing plug at the current height. In this process, the piston can draw the liquid in the feed bottle into the infusion tube during the descent process, and when the piston is withdrawn from the infusion tube, the infusion tube can continuously transport the titrant in the feed bottle to the mounting ring in the reagent bottle through the siphon principle. At this time, the titrant will flow along the mounting ring and fill the entire mounting ring. At this time, the titrant located in the mounting ring The titrant will flow down along the inner wall of the reagent bottle through each guide port, thereby eliminating impurities and residues in the reagent bottle and balancing the temperature in the reagent bottle to ensure that the concentration of the titrant in the burette body and the titration pen is consistent with that in the reagent bottle. After the impurities in the reagent bottle are removed and the internal temperature is balanced, the limit block is continued to be rotated and rotated between the second set of clips, and the rubber block on the clip is stuck in the limit groove of the limit block to limit the limit block. At this time, the liquid inlet on the sealing plug will enter the discharge pipe, and the discharge pipe is sealed by the sealing plug, and the liquid inlet on the side of the sealing plug is blocked and sealed by the inner wall of the discharge pipe, so that the liquid inlet and the discharge pipe can be blocked at the same time. At this time, the titrant flowing out of the infusion tube can remain in the reagent bottle for subsequent titration work; S3: When titrating the copper-nickel degreasing agent, the copper-nickel degreasing agent is poured into the solution bottle, and a stirring rod is placed in the solution bottle. Then, an appropriate amount of titrant is added to the reagent bottle, and the titrant is transported to the burette body through the pump body provided inside the three-way valve. The burette body can quantitatively transport the titrant, and the titrant is transported to the titration pen according to the specified metered amount through the three-way valve, and drips into the solution bottle through the titration pen. At this time, the stirring table is controlled to start, and the stirring rod is driven to rotate across the solution bottle by magnetic force to mix the titrant and the copper-nickel degreasing agent. During this process, the concentration of the copper-nickel degreasing agent ions will change, causing a sudden jump in the electrode potential near the titration end point. At this time, the potential change information of the copper-nickel degreasing agent ion concentration is received by the body, and the situation of the copper-nickel degreasing agent is detected through the potential change, thereby detecting the concentration, purity and degreasing efficiency of the copper-nickel degreasing agent; S4: After the titration detection work is completed, manually rotate the limit block in the reverse direction to move the rubber block on the clamping piece out of the limit groove. At this time, release the limit block, and use the resilience of the torsion spring to drive the transmission rod and the limit block to rotate back. During the rotation of the transmission rod, it can drive the lead screw to rotate in the reverse direction. At this time, the upward movement of the sealing plug can be driven by the reversely rotating lead screw. During the rotation of the limit block, when it moves between the first set of clamping pieces, the rubber block on the first set of clamping pieces cooperates with the limit groove on the limit block, and the limit block can be limited again. At this time, the height of the liquid inlet of the sealing plug just exceeds the top opening of the drain pipe. At this time, the residual titrant in the reagent bottle will be discharged into the liquid collection box through the liquid inlet and the drain port of the sealing plug. After the titrant in the reagent bottle is completely discharged, continue to push the limit block to separate the rubber block of the first set of clamping pieces from the limit groove of the limit block. At this time, continue to use the resilience of the torsion spring to make the transmission rod rotate to its original position, and use the lead screw that rotates in the reverse direction together with the transmission rod to lift the sealing plug until the piston is pushed back into the infusion tube again.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: In the present invention, the air in the infusion tube is squeezed out by the piston, so that a negative pressure state is formed inside. When the piston is just pulled out of the infusion tube, the liquid inlet of the sealing plug is still inside the reagent bottle at this time, and the infusion tube will drain the titrant in the feeding bottle, drain it into the installation ring, and flow down along the inner wall of the reagent bottle through the diversion port on the installation ring, and finally flow into the liquid collection box through the liquid inlet and the drain port on the sealing plug, avoiding the problem that the traditional device needs to repeatedly take and flip the reagent bottle when rinsing the reagent bottle with the titrant, and effectively improving the protection of the device for the reagent bottle; In the present invention, by continuously rotating in one direction, the liquid inlet of the sealing plug can be retracted into the drain pipe, so as to seal the drain pipe through the sealing plug. At this time, the titrant can be stored through the reagent bottle and is convenient for use during subsequent titration measurement work. At the same time, since the diameter of the diversion port on the installation ring is smaller than the diameter of the infusion tube, it can be ensured that when the titrant flows onto the installation ring, it can fill the installation ring and be evenly discharged through each diversion port on the installation ring, so that the titrant evenly covers the inner wall of the reagent bottle, thereby improving the balance effect of the temperature in the reagent bottle and effectively improving the auxiliary function of the device for the temperature balance work in the reagent bottle; In the present invention, through the cooperation of two groups of clamping pieces and the limit block, the transmission rod can be limited in a segmented manner, so that when the limit block is between each group of clamping pieces, the sealing plug, the reagent bottle, the piston and the infusion tube are in different position states, which is more convenient for the staff to operate and further improves the auxiliary function of the device for the staff during the titration work. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic structural diagram of the body of the present invention; Figure 3 is a schematic connection structure diagram of the reagent bottle, infusion bottle and visual filter of the present invention; Figure 4 is a schematic cross-sectional structure diagram of the reagent bottle of the present invention; Figure 5 is a schematic structure diagram of the mounting ring of the present invention; Figure 6 is a schematic connection structure diagram of the mounting bracket and the liquid collecting box of the present invention; Figure 7 is a partial structural schematic diagram of the mounting bracket of the present invention; Figure 8 is a schematic cross-sectional structure diagram of the liquid collecting box of the present invention; Figure 9 is the present invention Figure 5 is an enlarged structural schematic diagram of area A shown in the figure.

[0016] In the figure: 1, body; 11, three-way valve; 12, stirring table; 13, solution bottle; 2, burette body; 21, burette sleeve; 22, connecting pipe A; 3, fixing bracket; 31, limiting bracket; 32, titration pen; 33, connecting pipe B; 34, electrode rod; 4, mounting bracket; 41, limiting port; 42, clamping piece; 43, rubber block; 44, load-bearing ring; 45, tray; 5, reagent bottle; 51, drain pipe; 52, mounting ring; 53, diversion port; 54, limiting rod; 55, piston; 56, connecting rod; 57, mounting rod; 58, connecting pipe C; 6, feeding bottle; 61, infusion pipe; 62, feeding hopper; 63, communication port; 7, sealing plug; 71, liquid inlet; 72, liquid outlet; 73, thread groove; 74, magnet ring; 8, liquid collecting box; 81, lead screw; 82, transmission rod; 83, limiting block; 84, limiting groove; 85, torsion spring; 9, visual filter; 91, docking pipe. Detailed implementation manners

[0017] 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0018] Please refer to Figures 1-9The present invention provides a technical solution: a titration detection device for detecting a white copper degreasing agent, comprising a body 1, a three-way valve 11 being fixedly connected to the top of the body 1, a stirring platform 12 being fixedly connected to one side of the top of the body 1 near the fixed frame 3, a solution bottle 13 being placed on the stirring platform 12, a stirring rod being placed in the solution bottle 13, and a magnetic mechanism being built into the stirring platform 12, which can drive the stirring rod to rotate through the solution bottle 13 by magnetic force, so that the white copper degreasing agent is mixed with the titrant faster, thereby improving the efficiency of the titration determination of the white copper degreasing agent, a burette body 2 being docked with the top of the body 1, a burette sleeve 21 being provided on the outer sleeve of the burette body 2, a connecting pipe A22 being fixedly connected between the top of the burette body 2 and the three-way valve 11, a fixing frame 3 being fixedly connected to one side of the top of the body 1, a limiting frame 31 being slidably connected to the fixing frame 3, and the limiting frame 31 is respectively clamped There are a titration pen 32 and an electrode rod 34, a connecting pipe B33 is fixedly connected between the titration pen 32 and the three-way valve 11, a mounting frame 4 is provided on one side of the body 1, a load-bearing ring 44 is fixedly connected to the mounting frame 4, a reagent bottle 5 is clamped in the load-bearing ring 44, a connecting pipe C58 is fixedly connected between the reagent bottle 5 and the three-way valve 11, the three-way valve 11 has a built-in micro pump body, and the micro pump body cooperates with the connecting pipe A22, the connecting pipe B33 and the connecting pipe C58 to transport the titrant from the reagent bottle 5 to the titration tube body 2 and the titration pen 32 in sequence, a docking pipe 91 is fixedly connected to the top of the reagent bottle 5, and a visual filter 9 is fixedly connected to the end of the docking pipe 91 away from the reagent bottle 5, and an appropriate amount of carbon dioxide absorbent is contained in the visual filter 9, which can absorb the carbon dioxide in the titrant, thereby improving the titration efficiency and accuracy.

[0019] Furthermore, when testing the white copper degreasing agent, first, a proper amount of carbon dioxide absorbent is loaded into the visual filter 9, and then the various components of the device are docked, and then the white copper degreasing agent is poured into the solution bottle 13, and a stirrer is placed in the solution bottle 13, and then a proper amount of titrant is loaded into the reagent bottle 5, and the titrant is transported to the burette body 2 through the pump body provided inside the three-way valve 11. The burette body 2 can quantitatively transport the titrant, and the titrant is transported to the dropper pen 32 according to the specified amount through the three-way valve 11, and dripped into the solution bottle 13 through the dropper pen 32. At this time, the stirring table 12 is controlled to start, and the magnetic force is used to control the stirring table 12 to start. The stirrer is driven to rotate through the solution bottle 13 to mix the titrant and the white copper degreasing agent. During this process, the concentration of the white copper degreasing agent ions will change and the potential will change. Near the titration end point, the concentration of the measured ions will suddenly change, causing a sudden jump in the electrode potential. At this time, the potential jump information is received by the body 1, and the situation of the white copper degreasing agent is detected through the potential change. During the titration measurement process, the carbon dioxide absorbent can absorb the carbon dioxide in the titrant to prevent it from interfering with the titration result. After removing the carbon dioxide, the titration reaction is purer and faster, which helps to improve the titration efficiency and accuracy.

[0020] Combined with the attached Figure 3 , Figure 4 , Figure 5 and Figure 9 As shown, on one side of the load-bearing ring 44, a tray 45 is fixedly connected through a frame body. A feeding bottle 6 is placed on the tray 45. A feeding hopper 62 is fixedly connected to the top of the feeding bottle 6. The feeding hopper 62 is of a funnel-shaped structure, which makes it more convenient for the staff to pour the titrant into the feeding bottle 6. A plurality of communication ports 63 are opened at the top of the feeding bottle 6. A fixedly connected infusion tube 61 is inserted into the top of the feeding bottle 6. One end of the infusion tube 61 away from the feeding bottle 6 is inserted into one side of the top of the reagent bottle 5. The infusion tube 61 is slidably connected to the reagent bottle 5. A drain pipe 51 is fixedly connected to the bottom of the reagent bottle 5. An installation ring 52 is fixedly connected inside the reagent bottle 5. A plurality of uniformly distributed diversion ports 53 are opened on the installation ring 52. A baffle is arranged on the inner wall of the installation ring 52, which can block the titrant flowing into the installation ring 52, so that the titrant can only flow out from the diversion ports 53. The diameter of the infusion tube 61 is larger than the diameter of a single diversion port 53 and is equal to the combined diameter of each diversion port 53, ensuring that the titrant flowing out of the infusion tube 61 has a faster speed, while the speed of the titrant discharged from a single diversion port 53 is slower, so as to ensure that the titrant can fill the entire installation ring 52 and flow evenly along the inner wall of the reagent bottle 5. A limiting rod 54 is slidably connected inside the diversion port 53 close to the infusion tube 61. A piston 55 is fixedly connected to the top of the limiting rod 54. The piston 55 is located inside the infusion tube 61 and is slidably connected to it. One end of the bottom of the limiting rod 54 away from the piston 55 is rotatably connected to a connecting rod 56. One end of the connecting rod 56 away from the limiting rod 54 is rotatably connected to the bottom of an installation rod 57. The installation rod 57 is made of metal and can be adsorbed by the magnetic force of the magnet ring 74. A sealing plug 7 is slidably connected inside the drain pipe 51. The top of the sealing plug 7 is in contact with the bottom end of the installation rod 57. A plurality of uniformly distributed liquid inlet ports 71 are opened on the side of the sealing plug 7. A plurality of drain ports 72 with the same number as the liquid inlet ports 71 are opened at the bottom of the sealing plug 7. Each liquid inlet port 71 is communicated with the drain port 72 on its same side. A threaded groove 73 is opened at the bottom of the sealing plug 7. A magnet ring 74 is fixedly connected to the top of the sealing plug 7. The bottom end of the installation rod 57 is located inside the magnet ring 74.

[0021] Further, connect the feeding bottle 6 and the reagent bottle 5 through the infusion tube 61. Then, load an appropriate amount of titrant into the feeding bottle 6 through the feed hopper 62. After that, push the sealing plug 7 into the drain pipe 51 and make the magnet ring 74 catch at the bottom end of the mounting rod 57. As the sealing plug 7 is pushed in, the sealing plug 7 can push the piston 55 into the infusion tube 61 through the mounting rod 57. At this time, part of the air in the infusion tube 61 is discharged through the feeding bottle 6, and the inside of the infusion tube 61 is in a negative pressure state. When titration measurement work needs to be carried out, let the sealing plug 7 descend along the drain pipe 51. During this process, since the magnet ring 74 adsorbs the mounting rod 57, the sealing plug 7 can drive the mounting rod 57, the connecting rod 56, the limiting rod 54 and the piston 55 to descend together. When the piston 55 descends, it can suck the liquid in the feeding bottle 6 into the infusion tube 61. When the piston 55 is withdrawn from the infusion tube 61, the infusion tube 61 can continuously transport the titrant in the feeding bottle 6 to the mounting ring 52 in the reagent bottle 5 through the siphon principle. Since the diameter of the diversion port 53 is small, the titrant will flow along the mounting ring 52 and fill the entire mounting ring 52. At this time, the titrant on the mounting ring 52 will flow down along the inner wall of the reagent bottle 5 through the diversion port 53 to eliminate the impurities and residues in the reagent bottle 5 and balance the temperature in the reagent bottle 5, ensuring that the concentration of the titrant in the burette body 2 and the titration pen 32 is the same as that in the reagent bottle 5, which is convenient for improving the accuracy of subsequent titration detection. And when the piston 55 has just been withdrawn from the infusion tube 61, at this time, the liquid inlet 71 on the side of the sealing plug 7 is still inside the reagent bottle 5. When the titrant used to eliminate the impurities and residues in the reagent bottle 5 flows to the bottom of the reagent bottle 5, it will enter the liquid inlet 71 and be discharged through the drain port 72. When the impurities in the reagent bottle 5 are removed and the temperature in the reagent bottle 5 is balanced, continue to control the sealing plug 7 to descend until the liquid inlet 71 on the side of the sealing plug 7 enters the drain pipe 51. At this time, the inner wall of the drain pipe 51 seals the liquid inlet 71 on the side of the sealing plug 7, and the drain pipe 51 is blocked by the sealing plug 7. At this time, the titrant flowing out of the infusion tube 61 can be retained in the reagent bottle 5 for subsequent titration measurement work.

[0022] Combined with the attached Figure 3 、 Figure 6 、 Figure 7 and Figure 8As shown in the figure, a limiting opening 41 is formed on one side of the mounting bracket 4. A plurality of clamping pieces 42 are fixedly connected to both the upper and lower sides of the limiting opening 41. There are two groups of clamping pieces 42. Two clamping pieces 42 at the upper and lower corresponding positions of the limiting opening 41 form a group. Rubber blocks 43 are fixedly connected to the sides of the clamping pieces 42 close to the limiting opening 41. A liquid collecting box 8 is fixedly connected inside the mounting bracket 4. A lead screw 81 is rotatably connected to the inner bottom wall of the liquid collecting box 8. A transmission rod 82 is rotatably connected to the bottom of the liquid collecting box 8. The rotating shaft end of the transmission rod 82 is fixedly butted with the bottom end of the lead screw 81. The end of the transmission rod 82 away from the lead screw 81 is slidably connected to the inner wall of the limiting opening 41. A limiting block 83 is fixedly connected to the end of the transmission rod 82 away from the lead screw 81. Limiting grooves 84 are formed on both the top and bottom of the limiting block 83. When the limiting block 83 rotates between the first group of clamping pieces 42, at this time, the piston fifty-five is drawn out of the infusion tube sixty-one, and the liquid inlet seventy-one of the sealing plug 7 is still inside the reagent bottle 5. When the limiting block 83 rotates between the second group of clamping pieces 42, at this time, the sealing plug 7 completely enters the drain pipe fifty-one and seals the liquid inlet seventy-one through the inner wall of the drain pipe fifty-one, and seals the drain pipe fifty-one with the sealing plug 7, so that the drain pipe fifty-one and the liquid inlet seventy-one are sealed at the same time. A torsion spring 85 is fixedly connected between the bottom of the transmission rod 82 close to the lead screw 81 and the inner bottom wall of the mounting bracket 4. The lead screw 81 is located in the thread groove seventy-three and is threadedly connected to it.

[0023] Further, during the process of controlling the lifting of the sealing plug 7, the staff can move the limiting block 83 along the limiting port 41. During the movement, the transmission rod 82 can be driven to rotate clockwise, and the torsion spring 85 can be tightened by driving the transmission rod 82. During this process, the transmission rod 82 can drive the lead screw 81 to rotate. During the rotation of the lead screw 81, the sealing plug 7 can be driven to descend, so that the piston 55 descends. When the limiting block 83 rotates between the first set of clamping pieces 42, the rubber block 43 is stuck in the limiting groove 84 of the limiting block 83, and the limiting block 83 can be limited, and the sealing plug 7 can be kept at the current height. At this time, the piston 55 will be withdrawn from the infusion tube 61. At this time, the liquid inlet 71 of the sealing plug 7 is still located in the reagent bottle 5. At this time, the titrant flowing into the reagent bottle 5 will flow into the liquid collecting box 8 through the liquid inlet 71 and the liquid discharge port 72 for temporary storage. After the impurities in the reagent bottle 5 are removed, continue to rotate the limiting block 83 and rotate it between the second set of clamping pieces 42, and make the rubber block 43 on the clamping piece 42 snap into the limiting groove 84 of the limiting block 83 to limit the limiting block 83. At this time, the liquid inlet 71 on the sealing plug 7 will enter the drain pipe 51, and the drain pipe 51 can be sealed by the sealing plug 7, so that the titrant is stored in the reagent bottle 5. When the titration detection work is over, manually rotate the limiting block 83 in the reverse direction to make the rubber block 43 on the clamping piece 42 move out of the limiting groove 84. At this time, release the limiting block 83, and use the resilience of the torsion spring 85 to drive the transmission rod 82 and the limiting block 83 to rotate back. During the rotation of the transmission rod 82, it can drive the lead screw 81 to rotate in the reverse direction. At this time, the sealing plug 7 can be driven to move upward by the reversely rotating lead screw 81. During the rotation of the limiting block 83, when it moves between the first set of clamping pieces 42, at this time, the rubber block 43 on the first set of clamping pieces 42 cooperates with the limiting groove 84 on the limiting block 83, and the limiting block 83 can be limited again. At this time, the height of the liquid inlet 71 of the sealing plug 7 just exceeds the top opening of the drain pipe 51. At this time, the residual titrant in the reagent bottle 5 will be discharged into the liquid collecting box 8 through the liquid inlet 71 and the liquid discharge port 72 of the sealing plug 7. When the titrant in the reagent bottle 5 is completely discharged, continue to push the limiting block 83 to make the rubber block 43 of the first set of clamping pieces 42 disengage from the limiting groove 84 of the limiting block 83. At this time, continue to use the resilience of the torsion spring 85, and the transmission rod 82 can be rotated to its original position, and the sealing plug 7 can be lifted by the lead screw 81 that rotates in the reverse direction together with the transmission rod 82 until the piston 55 is pushed back into the infusion tube 61 again.

[0024] A determination method for a titration detection device of a cupronickel detection degreasing agent specifically includes the following steps: S1: First, place the device at the designated working position and power it on. Then, put the carbon dioxide absorbent into the visual filter 9. Next, connect the feed bottle 6 and the reagent bottle 5 with the infusion tube 61. At this time, the lead screw 81 will be inserted into the entrance of the threaded groove 73 at the bottom of the sealing plug 7 to support the sealing plug 7, so that during the process of lowering the reagent bottle 5, the sealing plug 7 is supported by the lead screw 81 and starts to rise. During this process, the sealing plug 7 is pushed into the drain pipe 51, and the magnet ring 74 is stuck at the bottom end of the mounting rod 57. As the sealing plug 7 is pushed in, the sealing plug 7 can push the piston 55 into the infusion tube 61 through the mounting rod 57. At this time, part of the air in the infusion tube 61 is discharged through the feed bottle 6, and the inside of the infusion tube 61 is in a negative pressure state. Then, load an appropriate amount of titrant into the feed bottle 6 through the feed hopper 62; S2: After that, the staff can move the limit block 83 along the limit port 41. During the movement, the transmission rod 82 can be driven to rotate, and the torsion spring 85 can be tightened by driving the transmission rod 82. During this process, the transmission rod 82 can drive the lead screw 81 to rotate. During the rotation of the lead screw 81, the sealing plug 7 can be driven to descend. When the limit block 83 rotates between the first set of clamping pieces 42, the limit block 83 can be limited by the rubber block 43 stuck in the limit groove 84 of the limit block 83, and the sealing plug 7 can be kept at the current height. During this process, when the piston 55 descends, the liquid in the feed bottle 6 can be pumped into the infusion tube 61. When the piston 55 is withdrawn from the infusion tube 61, the infusion tube 61 can continuously transport the titrant in the feed bottle 6 to the mounting ring 52 in the reagent bottle 5 through the siphon principle. At this time, the titrant will flow along the mounting ring 52 and fill the entire mounting ring 52. At this time, the titrant in the mounting ring 52 will flow down along the inner wall of the reagent bottle 5 through each diversion port 53 to eliminate the impurities and residues in the reagent bottle 5 and balance the temperature in the reagent bottle 5, ensuring that the concentration of the titrant in the burette body 2 and the burette pen 32 is the same as that in the reagent bottle 5. After the impurities in the reagent bottle 5 are removed and the temperature inside is balanced, continue to rotate the limit block 83 and turn it between the second set of clamping pieces 42, and make the rubber block 43 on the clamping piece 42 snap into the limit groove 84 of the limit block 83 to limit the limit block 83. At this time, the liquid inlet 71 on the sealing plug 7 will enter the drain pipe 51, and the drain pipe 51 will be sealed by the sealing plug 7. And the inner wall of the drain pipe 51 will block and seal the liquid inlet 71 on the side of the sealing plug 7, so that the liquid inlet 71 and the drain pipe 51 can be blocked at the same time. At this time, the titrant flowing out of the infusion tube 61 can be retained in the reagent bottle 5 for subsequent titration measurement work; S3: When titrating the copper-nickel degreasing agent, the copper-nickel degreasing agent is poured into the solution bottle 13, and a stirrer is placed in the solution bottle 13. Then, an appropriate amount of titrant is added to the reagent bottle 5. The titrant is transported to the burette body 2 through the pump body provided inside the three-way valve 11. The burette body 2 can quantitatively transport the titrant. The titrant is transported to the dropper pen 32 according to the specified amount through the three-way valve 11, and drips into the solution bottle 13 through the dropper pen 32. At this time, the stirring table 12 is controlled to start, and the stirrer is driven to rotate through the solution bottle 13 by magnetic force to mix the titrant and the copper-nickel degreasing agent. During this process, the concentration of the copper-nickel degreasing agent ions will change, causing a sudden jump in the electrode potential near the titration end point. At this time, the potential change information of the copper-nickel degreasing agent ion concentration is received by the body 1, and the copper-nickel degreasing agent is detected through the potential change, thereby detecting the concentration, purity and degreasing efficiency of the copper-nickel degreasing agent; S4: When the titration test is completed, the limit block 83 is manually rotated in the reverse direction to move the rubber block 43 on the clip 42 out of the limit groove 84. At this time, the limit block 83 is released, and the torsion spring 85 is used to rebound to drive the transmission rod 82 and the limit block 83 to rotate. During the rotation of the transmission rod 82, it can drive the screw rod 81 to rotate in the reverse direction. At this time, the sealing plug 7 can be driven to move upward by the reverse rotation of the screw rod 81. During the rotation of the limit block 83, when it moves between the first group of clips 42, the rubber block 43 on the first group of clips 42 cooperates with the limit groove 84 on the limit block 83, and the limit block 83 can be further rotated. The limit is performed, and the height of the liquid inlet 71 of the sealing plug 7 just exceeds the top opening of the discharge tube 51. At this time, the titrant remaining in the reagent bottle 5 will be discharged into the liquid collecting box 8 through the liquid inlet 71 and the discharge port 72 of the sealing plug 7. When the titrant in the reagent bottle 5 is completely discharged, continue to push the limit block 83 to disengage the rubber block 43 of the first group of clips 42 from the limit groove 84 of the limit block 83. At this time, continue to use the rebound force of the torsion spring 85 to rotate the transmission rod 82 to its original position, and use the screw rod 81 that rotates in the opposite direction with the transmission rod 82 to lift the sealing plug 7 until the piston 55 is pushed back into the infusion tube 61.

[0025] Working principle: First, place the device at the designated working position and power it on. Then, put the carbon dioxide absorbent in the visual filter 9. Next, connect the feeding bottle 6 and the reagent bottle 5 through the infusion tube 61. At this time, the lead screw 81 will be inserted into the entrance of the threaded groove 73 at the bottom of the sealing plug 7 to support the sealing plug 7. During the process of lowering the reagent bottle 5, the sealing plug 7 is supported by the lead screw 81, causing it to start rising. At this time, the sealing plug 7 is pushed into the drain pipe 51, and the magnet ring 74 is stuck at the bottom end of the mounting rod 57. As the sealing plug 7 is pushed in, the sealing plug 7 can push the piston 55 into the infusion tube 61 through the mounting rod 57. At this time, part of the air in the infusion tube 61 is discharged through the feeding bottle 6, making the inside of the infusion tube 61 in a negative pressure state. Then, load an appropriate amount of titrant into the feeding bottle 6 through the feed hopper 62. By moving the limit block 83 along the limit port 41, during the movement, the transmission rod 82 can be driven to rotate, and the torsion spring 85 is tightened by driving the transmission rod 82. During this process, the transmission rod 82 can drive the lead screw 81 to rotate. During the rotation of the lead screw 81, the sealing plug 7 can be driven to descend. When the limit block 83 rotates between the first set of clamping pieces 42, the limit block 83 can be limited by the rubber block 43 stuck in the limit groove 84 of the limit block 83, and the sealing plug 7 can be kept at the current height. During this process, when the piston 55 descends, the liquid in the feeding bottle 6 can be pumped into the infusion tube 61. When the piston 55 is withdrawn from the infusion tube 61, the infusion tube 61 can continuously transport the titrant in the feeding bottle 6 to the mounting ring 52 in the reagent bottle 5 through the siphon principle. At this time, the titrant will flow along the mounting ring 52 and fill the entire mounting ring 52. At this time, the titrant on the mounting ring 52 will flow down along the inner wall of the reagent bottle 5 through each diversion port 53. Then, continue to rotate the limit block 83 and rotate it between the second set of clamping pieces 42, and make the rubber block 43 on the clamping piece 42 snap into the limit groove 84 of the limit block 83 to limit the limit block 83. At this time, the liquid inlet 71 on the sealing plug 7 will enter the drain pipe 51, and the drain pipe 51 is sealed by the sealing plug 7. At this time, through the inner wall of the drain pipe 51, the side liquid inlet 71 of the sealing plug 7 can be sealed in reverse. At this time, the titrant flowing out of the infusion tube 61 can be retained in the reagent bottle 5 for subsequent titration measurement work; After that, the titration determination of the white copper degreasing agent can be carried out. When the white copper degreasing agent is titrated, the white copper degreasing agent is poured into the solution bottle 13, and a stirring rod is placed in the solution bottle 13. Then, an appropriate amount of titrant is added to the reagent bottle 5, and the titrant is transported to the burette body 2 through the pump body provided inside the three-way valve 11. The burette body 2 can quantitatively transport the titrant, and the titrant is transported to the dropper pen 32 according to the specified metered amount through the three-way valve 11, and dripped into the solution bottle 13 through the dropper pen 32. At this time, the stirring platform 12 is controlled to start, and the stirring rod is driven to rotate across the solution bottle 13 by magnetic force to mix the titrant and the white copper degreasing agent. In this process, the concentration of the white copper degreasing agent ions will change, causing a sudden jump in the electrode potential near the titration end point. At this time, the potential change information of the white copper degreasing agent ion concentration is received by the body 1, and the situation of the white copper degreasing agent is detected by the potential change; When the titration test is completed, the limit block 83 is manually rotated in the reverse direction to move the rubber block 43 on the clip 42 out of the limit groove 84. At this time, the limit block 83 is released, and the torsion spring 85 is used to rebound to drive the transmission rod 82 and the limit block 83 to rotate. During the rotation of the transmission rod 82, it can drive the screw rod 81 to rotate in the reverse direction. At this time, the sealing plug 7 can be driven upward by the reverse rotation of the screw rod 81. During the rotation of the limit block 83, when it moves between the first group of clips 42, the rubber block 43 on the first group of clips 42 cooperates with the limit groove 84 on the limit block 83, and the limit block 83 can be rotated again. Limit, at this time, the height of the liquid inlet 71 of the sealing plug 7 just exceeds the top opening of the discharge tube 51. At this time, the titrant remaining in the reagent bottle 5 will be discharged into the liquid collecting box 8 through the liquid inlet 71 and the discharge port 72 of the sealing plug 7. When the titrant in the reagent bottle 5 is completely discharged, continue to push the limit block 83 to disengage the rubber block 43 of the first group of clips 42 from the limit groove 84 of the limit block 83. At this time, continue to use the rebound force of the torsion spring 85 to rotate the transmission rod 82 to its original position, and use the screw rod 81 that rotates in the opposite direction with the transmission rod 82 to lift the sealing plug 7 until the piston 55 is pushed back into the infusion tube 61.

[0026] It should be noted that, in this document, relational terms such as first and second, etc., are used only 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 terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate 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 titration detection device for a cupronickel detection degreasing agent, comprising a body (1). A three-way valve (11) is fixedly connected to the top of the body (1). A burette body (2) is butted against the top of the body (1). A fixing frame (3) is fixedly connected to one side of the top of the body (1). A limiting frame (31) is slidably connected to the fixing frame (3). A titration pen (32) and an electrode rod (34) are respectively clamped on the limiting frame (31), characterized in that: On one side of the body (1), there is a mounting frame (4). A load-bearing ring (44) is fixedly connected to the mounting frame (4). On one side of the load-bearing ring (44), a tray (45) is fixedly connected through a frame body; On the tray (45), there is a feeding bottle (6). A fixedly connected infusion tube (61) is inserted into the top of the feeding bottle (6). A reagent bottle (5) is clamped in the load-bearing ring (44). One end of the infusion tube (61) away from the feeding bottle (6) is inserted into one side of the top of the reagent bottle (5). The infusion tube (61) is slidably connected to the reagent bottle (5). A drain pipe (51) is fixedly connected to the bottom of the reagent bottle (5). An installation ring (52) is fixedly connected inside the reagent bottle (5). A number of uniformly distributed diversion openings (53) are opened on the installation ring (52). A limiting rod (54) is slidably connected inside the diversion opening (53) on the side close to the infusion tube (61). A piston (55) is fixedly connected to the top of the limiting rod (54). The piston (55) is located inside the infusion tube (61) and is slidably connected to it. One end of the bottom of the limiting rod (54) away from the piston (55) is rotatably connected to a connecting rod (56). The bottom of the end of the connecting rod (56) away from the limiting rod (54) is rotatably connected to an installation rod (57); A sealing plug (7) is slidably connected inside the drain pipe (51). The top of the sealing plug (7) is in contact with the bottom end of the installation rod (57). A number of uniformly distributed liquid inlet openings (71) are opened on the side of the sealing plug (7). A number of drain openings (72) with the same number as the liquid inlet openings (71) are opened at the bottom of the sealing plug (7). Each liquid inlet opening (71) is communicated with the drain opening (72) on its same side.

2. The titration detection device for a cupronickel detection degreasing agent according to claim 1, characterized in that: On one side of the mounting frame (4), a limiting opening (41) is opened. A number of clamping pieces (42) are fixedly connected to both the upper and lower sides of the limiting opening (41). Rubber blocks (43) are fixedly connected to the side of each clamping piece (42) close to the limiting opening (41).

3. The titration detection device for a cupronickel detection degreasing agent according to claim 2, wherein: A liquid collecting box (8) is fixedly connected inside the mounting frame (4). A lead screw (81) is rotatably connected to the inner bottom wall of the liquid collecting box (8). A transmission rod (82) is rotatably connected to the bottom of the liquid collecting box (8). The rotating shaft end of the transmission rod (82) is fixedly docked with the bottom end of the lead screw (81). One end of the transmission rod (82) away from the lead screw (81) is slidably connected to the inner wall of the limiting opening (41). A limiting block (83) is fixedly connected to the end of the transmission rod (82) away from the lead screw (81). Limiting grooves (84) are opened at both the top and bottom of the limiting block (83). A torsion spring (85) is fixedly connected between the bottom of the end of the transmission rod (82) close to the lead screw (81) and the inner bottom wall of the mounting frame (4).

4. A titration detection device for a cupronickel detection degreasing agent according to claim 3, characterized in that: A threaded groove (73) is opened at the bottom of the sealing plug (7). The lead screw (81) is located inside the threaded groove (73) and is threadedly connected to it. A magnet ring (74) is fixedly connected to the top of the sealing plug (7). The bottom end of the installation rod (57) is located inside the magnet ring (74).

5. The titration detection device for a cupronickel detection degreasing agent according to claim 4, characterized in that: On one side of the top of the body (1) close to the fixing frame (3), a stirring table (12) is fixedly connected, and a solution bottle (13) is placed on the stirring table (12).

6. The titration detection device for a cupronickel detection degreasing agent according to claim 5, characterized in that: A burette sleeve (21) is sleeved outside the burette body (2), and a connecting pipe A (22) is fixedly connected between the top of the burette body (2) and the three-way valve (11).

7. A titration detection device for a cupronickel detection degreasing agent according to claim 6, characterized in that: A connecting pipe B (33) is fixedly connected between the burette pen (32) and the three-way valve (11), and a connecting pipe C (58) is fixedly connected between the reagent bottle (5) and the three-way valve (11).

8. A titration detection device for a cupronickel detection degreasing agent according to claim 7, characterized in that: The top of the feeding bottle (6) is fixedly connected with a feeding hopper (62), and a plurality of communication ports (63) are opened at the top of the feeding bottle (6).

9. The titration detection device for the cupronickel detection degreasing agent according to claim 8, wherein: The top of the reagent bottle (5) is fixedly connected with a docking pipe (91), and a visual filter (9) is fixedly connected to one end of the docking pipe (91) away from the reagent bottle (5).

10. A titration determination method for a cupronickel detection degreasing agent, characterized in that: A determination method for a titration detection device of a cupronickel detection degreasing agent according to claim 9 specifically comprises the following steps: S1: First, place the device at a designated working position and power on the device. Then, place the carbon dioxide absorbent in the visual filter (9). After that, connect the feeding bottle (6) and the reagent bottle (5) through the infusion tube (61). At this time, the lead screw (81) will be inserted into the entrance of the thread groove (73) at the bottom of the sealing plug (7) to support the sealing plug (7), so that during the process of putting down the reagent bottle (5), the sealing plug (7) is supported by the lead screw (81), causing it to start rising. During this process, the sealing plug (7) is pushed into the drain pipe (51), and the magnet ring (74) is stuck at the bottom end of the mounting rod (57). As the sealing plug (7) is pushed in, the sealing plug (7) can push the piston (55) into the infusion tube (61) through the mounting rod (57). At this time, part of the air in the infusion tube (61) is discharged through the feeding bottle (6), and the inside of the infusion tube (61) is in a negative pressure state. Then, an appropriate amount of titrant is loaded into the feeding bottle (6) through the feeding hopper (62); S2: After that, the staff can move the limit block (83) along the limit port (41). During the movement, the transmission rod (82) can be driven to rotate, and the torsion spring (85) can be tightened by driving the transmission rod (82). During this process, the transmission rod (82) can drive the lead screw (81) to rotate. When the lead screw (81) rotates, the sealing plug (7) can be driven to descend. When the limit block (83) rotates between the first set of clamping pieces (42), the rubber block (43) is stuck in the limit groove (84) of the limit block (83) to limit the limit block (83) and keep the sealing plug (7) at the current height. During this process, when the piston (55) descends, the liquid in the material feeding bottle (6) can be pumped into the infusion tube (61). After the piston (55) is withdrawn from the infusion tube (61), the infusion tube (61) can continuously transport the titrant in the material feeding bottle (6) to the mounting ring (52) in the reagent bottle (5) through the siphon principle. At this time, the titrant will flow along the mounting ring (52) and fill the entire mounting ring (52). At this time, the titrant in the mounting ring (52) will flow down along the inner wall of the reagent bottle (5) through each diversion port (53) to eliminate the impurities and residues in the reagent bottle (5) and balance the temperature in the reagent bottle (5), ensuring that the concentration of the titrant in the burette body (2) and the titration pen (32) is the same as that in the reagent bottle (5). After the impurities in the reagent bottle (5) are removed and the internal temperature is balanced, continue to rotate the limit block (83) and turn it between the second set of clamping pieces (42), and make the rubber block (43) on the clamping piece (42) snap into the limit groove (84) of the limit block (83) to limit the limit block (83). At this time, the liquid inlet (71) on the sealing plug (7) will enter the drain pipe (51), and the drain pipe (51) will be sealed by the sealing plug (7). And the inner wall of the drain pipe (51) blocks and seals the liquid inlet (71) on the side of the sealing plug (7), so that the liquid inlet (71) and the drain pipe (51) can be blocked at the same time. At this time, the titrant flowing out of the infusion tube (61) can be retained in the reagent bottle (5) for subsequent titration measurement work; S3: When titrating the copper-white degreasing agent, pour the copper-white degreasing agent into the solution bottle (13), and place a stirrer in the solution bottle (13). Then, put an appropriate amount of titrant into the reagent bottle (5), and transport the titrant to the burette body (2) through the pump body provided inside the three-way valve (11). The burette body (2) can quantitatively transport the titrant, and transport the titrant to the titration pen (32) according to the specified amount through the three-way valve (11), and drip it into the solution bottle through the titration pen (32). (13), at this time, the stirring table (12) is controlled to start, and the magnetic force is used to drive the stirring rod to rotate through the solution bottle (13), so that the titrant and the white copper degreasing agent are mixed. During this process, the concentration of the white copper degreasing agent ions will change, causing a sudden jump in the electrode potential near the titration end point. At this time, the potential change information of the white copper degreasing agent ion concentration is received by the body (1), and the condition of the white copper degreasing agent is detected through the potential change, thereby detecting the concentration, purity and degreasing efficiency of the white copper degreasing agent; S4: When the titration test is completed, the limit block (83) is manually rotated in the reverse direction to move the rubber block (43) on the clip (42) out of the limit groove (84). At this time, the limit block (83) is released, and the rebound of the torsion spring (85) is used to drive the transmission rod (82) and the limit block (83) to rotate. During the rotation of the transmission rod (82), it can drive the screw rod (81) to rotate in the reverse direction. At this time, the sealing plug (7) can be driven upward by the screw rod (81) rotating in the reverse direction. During the rotation of the limit block (83), when it moves between the first group of clips (42), the rubber block (43) on the first group of clips (42) cooperates with the limit groove (84) on the limit block (83), and the limit block (83) can be limited. At this time, the height of the liquid inlet (71) of the sealing plug (7) just exceeds the top opening of the discharge tube (51). At this time, the titrant remaining in the reagent bottle (5) will be discharged into the liquid collecting box (8) through the liquid inlet (71) and the discharge port (72) of the sealing plug (7). When the titrant in the reagent bottle (5) is completely discharged, the limit block (83) is continuously pushed to disengage the rubber block (43) of the first set of clips (42) from the limit groove (84) of the limit block (83). At this time, the rebound force of the torsion spring (85) is continuously utilized to rotate the transmission rod (82) to its original position, and the screw rod (81) that rotates in the opposite direction with the transmission rod (82) is utilized to lift the sealing plug (7) until the piston (55) is pushed back into the infusion tube (61).

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