Equipment for testing free chlorine in water

Abstract

The invention relates to the technical field of free chlorine content detection equipment, and particularly provides water free chlorine test equipment which comprises a shell, a water inlet and a water outlet are formed in the shell, a rotating disc is rotationally arranged in the shell, a sampling bottle and a reagent bottle which can slide relative to the axial direction are arranged on the rotating disc in the radial direction, and a friction disc is arranged in the shell. A plurality of annular tracks and driving rings are arranged on the friction disc, so that the reagent bottles and the sampling bottles are driven to revolve when the rotating disc rotates, then the sampling bottles can perform quantitative sampling, quantitative reagent feeding and regular and uniform mixing, and a plurality of sampling bottles and reagent bottles are arranged on the rotating disc, so that a plurality of samples can be collected and detected at the same time; the time of manual operation can be greatly shortened, the detection efficiency is improved, and the detection accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of free chlorine content detection equipment, and particularly to a free chlorine testing equipment for water. Background Art

[0002] Free chlorine refers to the chlorine existing in water in the forms of hypochlorous acid (HOCl) and hypochlorite ions (OCl - ) and is used for water disinfection. It is part of the residual chlorine and has strong oxidizing property and bactericidal ability.

[0003] When tap water is transported from the water plant to users' homes, the chlorine content may be affected by factors such as pipeline aging and pollutant entry. Monitoring free chlorine can judge the water quality change and ensure safe water supply.

[0004] The existing methods for detecting free chlorine generally adopt manual sampling. The PDP colorimetric method is used to detect the content of free chlorine in water. When taking a manual sample, a clean colorimetric dish is needed to take 10 ml of water sample. After sampling, the PDP reagent is added to the colorimetric dish and shaken well. The solution in the colorimetric dish changes from light pink to deep pink. The color of the solution in the colorimetric dish can be compared with the standard color on the color comparison card to read the free chlorine concentration, or a spectrophotometer (wavelength 515 nm) can be used to read the absorbance, and the concentration can be calculated by referring to the standard curve.

[0005] However, the above-mentioned manual sampling may lead to inaccurate sampling volume, affecting the later reaction degree with the reagent, and it is difficult to control the time for manually mixing the water sample and the reagent, resulting in inaccurate control of whether the reaction is sufficient. Summary of the Invention

[0006] Based on this, in view of the problem of inaccurate detection results in the current manual sampling detection, it is necessary to provide a free chlorine testing equipment for water.

[0007] The above object is achieved by the following technical solutions: A free chlorine testing equipment for water, comprising: A housing, an inlet and an outlet are formed on the housing, and a liquid suction area and a mixing area are arranged inside the housing; A rotating disk, which is rotatably arranged in the housing. A channel is formed between the outer wall of the rotating disk and the inner wall of the housing. The channel is located in the liquid suction area. Liquid flows through the channel from the inlet and then discharges from the outlet; A reagent bottle and a sampling bottle. The reagent bottle is inserted along the radial direction of the rotating disk on the outer periphery of the rotating disk. The sampling bottle is slidably sleeved on the outer periphery of the reagent bottle, and the sampling bottle can axially slide relative to the reagent bottle; The sampling bottle is configured such that when the rotating disk drives the sampling bottle to revolve in the liquid suction area and the linear velocity of the rotation of the rotating disk is the same as the liquid flow velocity, the sampling bottle moves a first preset distance in the radial direction towards the center of the rotating disk, the volume of the sampling bottle increases to suck the liquid in the liquid suction area, and when the cumulative moving distance of the sampling bottle reaches a second preset distance, the sampling bottle communicates with the reagent bottle, and the reagent in the reagent bottle enters the sampling bottle; When the rotating disk drives the sampling bottle to revolve in the mixing area and the linear velocity of the rotation of the rotating disk is the same as the liquid flow velocity, the sampling bottle rotates around its own axis to mix the internal liquid.

[0008] Further, a friction disk is rotatably arranged in the housing. A plurality of annular slide rails are coaxially and fixedly arranged on the upper end surface of the friction disk. The radii of the plurality of annular slide rails gradually increase from inside to outside, and each annular slide rail has a notch. When the friction disk is stationary relative to the housing, the notch of each annular slide rail is located in the liquid suction area. Among two adjacent annular slide rails, the end of the outer annular slide rail is arc-connected to the start end of the inner annular slide rail. A slider is fixedly arranged on the outer periphery of the sampling bottle, and the slider is slidably arranged in the annular slide rail and gradually slides from the outer annular slide rail to the inner annular slide rail.

[0009] Further, a driving ring is coaxially and fixedly arranged on the friction disk. Teeth are arranged on the upper end surface of the driving ring located in the mixing area. A gear is coaxially arranged on the outer periphery of the sampling bottle. The sampling bottle rotates synchronously with the gear, and the gear meshes with the teeth.

[0010] Further, a first switch is arranged at one end of the reagent bottle located inside the sampling bottle. The first switch can connect or block the reagent bottle and the sampling bottle. The other end of the reagent bottle is connected with a liquid inlet pipe. One end of the liquid inlet pipe communicates with the channel, and the other end of the liquid inlet pipe communicates with the sampling bottle. A second switch is arranged on the liquid inlet pipe. The second switch can open or block the liquid inlet pipe; The first switch and the second switch are configured such that when the sampling bottle moves a first preset distance in the radial direction towards the center of the rotating disk, the second switch opens the liquid inlet pipe, and when the cumulative moving distance of the sampling bottle in the radial direction towards the center of the rotating disk reaches the second preset distance, the first switch connects the sampling bottle and the reagent bottle, and the second switch blocks the liquid inlet pipe.

[0011] Further, the first switch includes a first sealing ring and a second sealing ring. The first sealing ring is coaxially and fixedly arranged at one end of the reagent bottle located inside the sampling bottle. The inner circumference of the first sealing ring is a conical surface. The second sealing ring is coaxially abutted against the conical surface of the inner circumference of the first sealing ring. A through groove is formed on one end surface of the second sealing ring in contact with the first sealing ring. The through groove communicates with the sampling bottle. After the cumulative distance of the sampling bottle moving along the radial direction towards the center of the rotating disk reaches a second preset distance, the second sealing ring can be driven to move axially.

[0012] Further, an elastic sealing ring is arranged at the sliding connection position of the reagent bottle and the sampling bottle.

[0013] Further, the second switch includes a connecting pipe and an elastic member. The connecting pipe is vertically connected to and communicates with the liquid inlet pipe. The liquid inlet pipe axially slides through the second sealing ring. A conical groove is arranged on the inner circumference of the second sealing ring. The two ports of the connecting pipe are adapted to the conical surface of the conical groove. The elastic member is sleeved on the outer circumference of the liquid inlet pipe, and one end of the elastic member is connected to the bottom of the conical groove, and the other end of the elastic member is connected to the connection position of the connecting pipe and the liquid inlet pipe.

[0014] Further, a piston is slidably and sealingly arranged in the reagent bottle. The piston can move axially along the reagent bottle. A through hole is arranged at one end of the reagent bottle away from the sampling bottle.

[0015] Further, a driving assembly is arranged on the outer circumference of the housing. The linear velocity of the driving assembly driving the rotating disk to rotate is the same as the velocity of the liquid flowing through the channel.

[0016] Further, the free chlorine detection device in water further includes a spectrophotometer. A disk is arranged on the spectrophotometer. The size of the disk is the same as the size of the housing.

[0017] The beneficial effects of the present invention are as follows: By arranging a sampling bottle and a reagent bottle on the rotating disk in the present invention, the sampling bottle can axially move relative to the reagent bottle, and a friction disk is arranged in the housing. A plurality of annular tracks and driving rings are arranged on the friction disk, so that when the rotating disk rotates, the reagent bottle and the sampling bottle are driven to revolve, thereby enabling the sampling bottle to quantitatively sample, quantitatively dispense reagents, uniformly mix at a fixed time, and a plurality of sampling bottles and reagent bottles are arranged on the rotating disk, multiple samples can be collected, and multiple samples are detected simultaneously, which can greatly reduce the time of manual operation, improve the detection efficiency, and increase the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of a free chlorine detection device in water provided by an embodiment of the present invention; Figure 2Schematic structural diagram of a spectrophotometer of a free chlorine detection device in water provided by an embodiment of the present invention; Figure 3 For Figure 1 Top view of a free chlorine detection device in water provided by an embodiment in Figure 4 For Figure 3 Cross-sectional view of a free chlorine detection device in water provided by an embodiment in along A-A; Figure 5 For Figure 4 Partial enlarged view of part X of a free chlorine detection device in water provided by an embodiment in ; Figure 6 For Figure 4 Cross-sectional view of a free chlorine detection device in water provided by an embodiment in along B-B in the initial state; Figure 7 For Figure 4 Cross-sectional view of a free chlorine detection device in water provided by an embodiment in along B-B when mixing is completed; Figure 8 For Figure 6 Partial enlarged view of part Y of a free chlorine detection device in water provided by an embodiment in in the initial state; Figure 9 For Figure 7 Partial enlarged view of part Z of a free chlorine detection device in water provided by an embodiment in when mixing is completed; Figure 10 Schematic structural diagram of a friction disc of a free chlorine detection device in water provided by an embodiment of the present invention; Figure 11 For Figure 10 Top view of a friction disc of a free chlorine detection device in water provided by an embodiment in ; Figure 12 For Figure 1 Schematic bottom structure diagram of a friction disc of a free chlorine detection device in water provided by an embodiment in .

[0019] Wherein: 100, housing; 110, water inlet; 120, water outlet; 130, channel; 140, liquid suction area; 150, mixing area; 160, driving impeller; 170, first transmission wheel; 180, second transmission wheel; 190, belt; 200, rotating disc; 210, end cover; 220, friction disc; 230, annular slide rail; 231, starting end; 232, ending end; 240, driving ring; 250, tooth; 260, limiting ring; 270, limiting groove; 271, limiting plate; 280, detection port; 290, mirror; 300, reagent bottle; 310, piston; 320, liquid inlet tube; 330, first sealing ring; 340, second sealing ring; 350, through groove; 360, connecting pipe; 370, conical groove; 380, elastic member; 400, sampling bottle; 410, slider; 420, elastic sealing ring; 430, gear; 440, limiting strip; 500, spectrophotometer; 510, disc; 520, drive shaft; 530, adjusting screw. Detailed implementation manners

[0020] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The "connection" and "coupling" mentioned in the present invention, unless otherwise clearly specified and defined, both include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present invention.

[0022] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0023] The following refers to Figures 1 - 12 to describe a free chlorine testing device in water provided by the present invention.

[0024] A free chlorine testing device in water, comprising a housing 100. The housing 100 is in a circular disc shape with a hollow interior. An inlet 110 and an outlet 120 are provided on the housing 100. A liquid suction area 140 and a mixing area 150 are arranged inside the housing 100. A rotating disc 200 is rotatably arranged inside the housing 100. A channel 130 is formed between the outer wall of the rotating disc 200 and the inner wall of the housing 100. This channel 130 is located in the liquid suction area 140. Liquid enters the housing 100 from the inlet 110, passes through the channel 130, and then is discharged through the outlet 120. Reagent bottles 300 are radially inserted on the peripheral wall of the rotating disc 200. A sampling bottle 400 is coaxially and slidably sleeved on the outer periphery of the end of the reagent bottle 300 close to the center of the rotating disc 200. The sampling bottle 400 can axially move relative to the reagent bottle 300. After the liquid enters the housing 100 through the inlet 110 and flows through the channel 130, the flowing liquid generates a force on the rotating disc 200 to drive the rotating disc 200 to rotate. The rotating disc 200 drives the sampling bottle 400 and the reagent bottle 300 to revolve together. The rotating disc 200 can drive the sampling bottle 400 and the reagent bottle 300 to continuously pass through the liquid suction area 140 and the mixing area 150. When the linear velocity of the rotating disc 200 is the same as the flowing velocity of the liquid in the channel 130 and passes through the liquid suction area 140, the sampling bottle 400 can move a first preset distance radially towards the center of the rotating disc 200. At this time, the volume inside the sampling bottle 400 increases to generate negative pressure inside, so as to be able to suck the liquid in the channel 130. After the cumulative moving distance of the sampling bottle 400 in the liquid suction area 140 reaches the second preset distance, the sampling bottle 400 can communicate with the reagent bottle 300. The sampling bottle 400 can suck the reagent in the reagent bottle 300 into the sampling bottle 400. Each time the rotating disc 200 drives the sampling bottle 400 to pass through the mixing area 150, the sampling bottle 400 can rotate around its own axis to mix the liquid and the reagent.

[0025] It can be understood that when the linear velocity of the rotating disc 200 is the same as the flowing velocity of the liquid in the channel 130, there is no relative movement between the liquid and the rotating disc 200, and the liquid will not generate additional shear stress or turbulence on the rotating disc 200, so that the sampling bottle 400 on the rotating disc 200 is not affected during sampling, the liquid flows smoothly, thereby ensuring that the obtained sample is representative. And the moving distance of the sampling bottle 400 each time it passes through the liquid suction area 140 is fixed. Therefore, the sampling bottle 400 in the present invention can quantitatively sample. At the same time, the time of the sampling bottle 400 in the mixing area 150 is also determined, so as to be able to control the mixing time of the liquid and the reagent in the sampling bottle 400.

[0026] Specifically, to realize the axial movement of the sampling bottle 400, a friction disc 220 is rotatably arranged inside the rotating disc 200, as Figure 10 and Figure 11As shown, a plurality of annular slide rails 230 are coaxially and fixedly arranged on the upper end surface of the friction disc 220. The radii of the plurality of annular slide rails 230 gradually increase from inside to outside, and each annular slide rail 230 has a notch. In this embodiment, the annular slide rails 230 are all three-quarter arcs, and the notch is the other quarter arc. The notch of each annular slide rail 230 is located in the liquid suction area 140, and each annular slide rail 230 is located in the mixing area 150, as Figure 11 As shown, it is set that the sampling bottle 400 rotates counterclockwise along the annular slide rail 230, and starts to slide from the outermost annular slide rail 230. Among two adjacent annular slide rails 230, the end 232 of the outer annular slide rail 230 is arc-connected to the starting end 231 of the inner annular slide rail 230. This arc connection is named the arc transition section. A slider 410 is fixedly arranged on the outer periphery of the sampling bottle 400. The slider 410 is located in the annular slide rail 230. In the initial state, the slider 410 is located in the outermost annular slide rail 230. When the rotating disc 200 rotates, it can drive the slider 410 to move from the starting end 231 to the end 232 in the annular slide rail 230 and then move to the inner annular slide rail 230 near the inner side through the connection of the two annular slide rails 230.

[0027] It can be understood that when the slider 410 moves within the same annular slide rail 230, the radius of the slider 410 during rotation does not change, so the sampling bottle 400 does not move axially. When the slider 410 enters the starting end 231 of the inner annular slide rail 230 from the end 232 of the outer annular slide rail 230, that is, when passing through the arc transition section, the radius of rotation of the sampling bottle 400 decreases, so that the sampling bottle 400 can move axially relative to the reagent bottle 300, and moves along the radial direction of the rotating disc 200 towards the center of the rotating disc 200. Since the reagent bottle 300 cannot move axially on the rotating disc 200, the volume of the sampling bottle 400 increases, and then the liquid can be sucked into the sampling bottle 400. Moreover, the distance that the sampling bottle 400 moves each time is fixed, so that the sampling bottle 400 can sample quantitatively.

[0028] It should be noted that the friction disk 220 initially rotates relative to the housing 100. When the linear velocity of the rotating disk 200 is the same as the flow velocity of the liquid, the friction disk 220 stops rotating relative to the housing 100. The upper end surface of the outer edge part of the friction disk 220 is in frictional contact with the bottom of the rotating disk 200. When the liquid enters the housing 100 and passes through the channel 130, it can drive the rotating disk 200 to rotate. The rotating disk 200 drives the friction disk 220 to rotate through friction. At this time, the friction disk 220 rotates relative to the housing 100. This is because at the beginning, the rotation speed of the rotating disk 200 is less than the flow velocity of the liquid. At this time, it cannot be ensured that the sample is representative when collecting the sample. Therefore, when the linear velocity of the rotating disk 200 increases to be the same as the flow velocity of the liquid, the relative rotation of the friction disk 220 and the housing 100 is controlled, and it is ensured that all the multiple annular slide rails 230 on the friction disk 220 are located in the mixing area 150, and at the same time, the notches of all the multiple annular slide rails 230 are located in the liquid suction area 140. Therefore, a limiting groove 270 is formed in the lower end surface of the friction disk 220, and limiting plates 271 are arranged at positions corresponding to the notches of the multiple annular slide rails 230 in the limiting groove 270. And an adjusting screw 530 is threadedly connected to the bottom of the housing 100. When it is necessary to limit the rotation of the friction disk 220 when the linear velocity of the rotating disk 200 is the same as the flow velocity of the liquid, the adjusting screw 530 rotates to extend the adjusting screw 530 into the limiting groove 270. When the notches of all the multiple annular slide rails 230 on the friction disk 220 move into the liquid suction area 140, the limiting plate 271 abuts against the adjusting screw 530 to limit the rotation of the friction disk 220, so that the friction disk 220 is stationary relative to the housing 100.

[0029] To facilitate the slider 410 of the sampling bottle 400 on the rotating disk 200 to slide in the annular slide rail 230 and be able to contact the friction disk 220, the bottom end of the rotating disk 200 in this embodiment has an annular hole, and the diameter of the annular hole is slightly smaller than the diameter of the friction disk 220, so that the bottom end of the rotating disk 200 contacts the friction disk 220.

[0030] In a further embodiment, to realize the function that the sampling bottle 400 rotates around its own axis in the mixing area 150, a driving ring 240 is coaxially arranged on the upper end surface of the friction disk 220. The radius of the driving ring 240 is smaller than the radius of the innermost annular slide rail 230, such as Figure 10 and Figure 11As shown, that is, the drive ring 240 is located inside the innermost annular slide rail 230. Teeth 250 are provided in three-quarters of the upper end surface area of the drive ring 240, and the area where the teeth 250 are provided is located in the mixing area 150. There are no teeth 250 in one-quarter of the upper end surface area of the drive ring 240, and this area is located in the liquid suction area 140. A gear 430 is coaxially provided on the outer periphery of the sampling bottle 400, and a limiting strip 440 extending along its axial direction is provided on the outer periphery of the sampling bottle 400. The function of the limiting strip 440 is to limit the relative rotation between the gear 430 and the sampling bottle 400. Therefore, when the rotating disk 200 drives the sampling bottle 400 to revolve, the sampling bottle 400 can be driven to rotate around its own axis through the engagement between the gear 430 and the teeth 250. Since the teeth 250 are only provided in the mixing area 150, the sampling bottle 400 can rotate around its own axis and mix the internal liquid only when the sampling bottle 400 revolves into the mixing area 150.

[0031] It should be noted that a limiting ring 260 with a height higher than that of the teeth 250 is provided on the inner circumference of the drive ring 240, and the gear 430 can axially slide relative to the sampling bottle 400. When the gear 430 meshes with the teeth 250 on the drive ring 240, the end surface of the gear 430 is in sliding contact with the limiting ring 260. The limiting ring 260 can prevent the gear 430 from crossing the drive ring 240 and thus disengaging from the teeth 250. It can be understood that since the sampling bottle 400 can move in the radial direction towards the center of the rotating disk 200, the limiting ring 260 is provided to limit the simultaneous movement of the gear 430 and the sampling bottle 400 and prevent them from disengaging from the teeth 250.

[0032] By providing the drive ring 240 and the gear 430, the sampling bottle 400 rotates around its own axis for the same time, so as to ensure that the mixing degree of each sampling bottle 400 is the same.

[0033] In a further embodiment, to achieve liquid suction of the sampling bottle 400 and mixing of the liquid in the sampling bottle 400 with the reagent in the reagent bottle 300, a first switch is provided at one end of the reagent bottle 300 located inside the sampling bottle 400. The first switch can connect or block the reagent bottle 300 and the sampling bottle 400. When the first switch is opened, the reagent bottle 300 and the sampling bottle 400 are connected, and the reagent in the reagent bottle 300 is sucked into the sampling bottle 400 so that the reagent can be mixed with the liquid. When the first switch is closed, the connection between the reagent bottle 300 and the sampling bottle 400 is blocked. A liquid inlet pipe 320 is fixedly connected to the other end of the reagent bottle 300. One end of the liquid inlet pipe 320 is connected to the channel 130 inside the housing 100, and the other end of the liquid inlet pipe 320 is connected to the sampling bottle 400. A second switch is also provided on the liquid inlet pipe 320. The second switch can open or block the liquid inlet pipe 320. When the second switch is opened, the sampling bottle 400 and the channel 130 can be connected. When the reagent bottle 300 moves in the liquid suction area 140, a negative pressure can be generated to suck the liquid in the channel 130. When the second switch is closed, the connection between the sampling bottle 400 and the channel 130 is blocked.

[0034] It should be noted that the first switch and the second switch in this embodiment are configured such that when the sampling bottle 400 moves a first preset distance (the first preset distance refers to the difference in radius between two adjacent annular slide rails 230) in the radial direction towards the center of the turntable 200, the second switch opens the liquid inlet pipe 320, and the liquid inlet pipe 320 connects the sampling bottle 400 and the channel 130. The internal negative pressure of the sampling bottle 400 thus quantitatively sucks the liquid. At this time, the first switch blocks the reagent bottle 300 and the sampling bottle 400. When the cumulative distance that the sampling bottle 400 moves in the radial direction towards the center of the turntable 200 reaches a second preset distance (the second preset distance refers to the difference in radius between the outermost annular slide rail 230 and the second innermost annular slide rail 230), the reagent mixing starts. At this time, the second switch blocks the liquid inlet pipe 320, and the sampling bottle 400 no longer samples. At the same time, the first switch is opened, the reagent bottle 300 and the sampling bottle 400 are connected, and after the sampling bottle 400 generates a negative pressure, the reagent in the reagent bottle 300 is sucked into the sampling bottle 400 for mixing.

[0035] Specifically, the first switch in this embodiment includes a first sealing ring 330 and a second sealing ring 340. The first sealing ring 330 is coaxially and fixedly arranged at one end of the reagent bottle 300 located inside the sampling bottle 400. The inner circumference of the first sealing ring 330 is a conical surface, and there is an opening at the small end of the conical surface. The reagent can enter the sampling bottle 400 through the opening. The second sealing ring 340 is coaxial with the first sealing ring 330, and the surface of the second sealing ring 340 in contact with the first sealing ring 330 is also a conical surface. A through groove 350 is provided at the position where the second sealing ring 340 contacts the first sealing ring 330. When the conical surfaces of the second sealing ring 340 and the first sealing ring 330 are not in contact, the reagent can enter the sampling bottle 400 through the opening and the through groove 350. When the first sealing ring 330 and the second sealing ring 340 are in contact, the conical surface seals the through groove 350, thereby sealing the reagent bottle 300 and the sampling bottle 400.

[0036] It should be noted that an elastic sealing ring 420 is provided at the position where the sampling bottle 400 is sleeved on the reagent bottle 300. The elastic sealing ring 420 can play a sealing role. Second, after the sampling bottle 400 moves a cumulative second preset distance in the radial direction towards the center of the rotating disk 200, it contacts the outer circumference of the second sealing ring 340, and can drive the second sealing ring 340 to move away from the first sealing ring 330, thereby separating the first sealing ring 330 and the second sealing ring 340.

[0037] More specifically, the second switch in this embodiment includes a connecting pipe 360 and an elastic member 380. The connecting pipe 360 is vertically connected and communicated with the liquid inlet pipe 320, as Figure 8 and Figure 9As shown in the figure, the liquid inlet pipe 320 axially slides through the second sealing ring 340. A conical groove 370 is provided on the inner circumference of the second sealing ring 340. The two ports of the connecting pipe 360 are adapted to the conical groove 370. The elastic member 380 is sleeved on the outer circumference of the liquid inlet pipe 320. One end of the elastic member 380 is connected to the position where the liquid inlet pipe 320 and the connecting pipe 360 are connected, and the other end of the elastic member 380 is connected to the bottom of the conical groove 370 of the second sealing ring 340. In the initial state, the two ports of the connecting pipe 360 do not contact the conical groove 370. At this time, the liquid inlet pipe 320 is in an open state. When the sampling bottle 400 moves a first preset distance along the radial direction towards the center of the rotating disk 200, it can suck the liquid. The liquid enters the sampling bottle 400 through the liquid inlet pipe 320 and the two ports of the connecting pipe 360. However, at this time, the elastic member 380 has a certain amount of compression. The elastic member 380 pushes the second sealing ring 340 to tightly abut against the first sealing ring 330, thereby blocking the connection between the sampling bottle 400 and the reagent bottle 300. When the elastic sealing ring 420 on the sampling bottle 400 drives the second sealing ring 340 to move, the elastic member 380 can be compressed again. The second sealing ring 340 and the first sealing ring 330 move away from each other. The reagent bottle 300 and the sampling bottle 400 are connected, and the conical surface of the second sealing ring 340 is tightly attached to the two ports of the connecting pipe 360 to block the connecting pipe 360, thereby preventing the sampling bottle 400 from continuing to suck the liquid.

[0038] It should be noted that to ensure that the sampling bottle 400 can suck the reagent in the reagent bottle 300, a piston 310 is slidably sealed in the reagent bottle 300. A reagent is filled between the piston 310 and one end of the reagent bottle 300 located in the sampling bottle 400. A through hole (not shown in the figure) is provided at one end of the reagent bottle 300 away from the sampling bottle 400. The function of the through hole is to prevent the piston 310 from being unable to move in the reagent bottle 300. When the first sealing ring 330 and the second sealing ring 340 move away from each other, the sampling bottle 400 sucks the reagent in the reagent bottle 300. At the same time, the piston 310 will move towards the direction close to the sampling bottle 400 under the action of the liquid, ensuring that the reagent can fully enter the sampling bottle 400.

[0039] In a further embodiment, there are multiple reagent bottles 300 and sampling bottles 400 in the present invention. The multiple reagent bottles 300 are circumferentially and evenly distributed on the rotating disk 200, and the number of reagent bottles 300 is the same as the number of sampling bottles 400. In this embodiment, 8 are taken as an example to increase the number of samples. Multiple samples can be detected during subsequent detection, and the average value of multiple samples is taken to improve the accuracy of the detection result.

[0040] In a further embodiment, the present invention realizes that the linear velocity of the rotation of the rotating disk 200 is the same as the flow velocity of the liquid through a driving assembly. The driving assembly includes a driving impeller 160, a first transmission wheel 170, and a second transmission wheel 180. As Figure 6 shown, the driving impeller 160 is rotatably arranged in the housing 100. Blades are arranged on the outer periphery of the driving impeller 160. The driving impeller 160 is close to the water outlet 120. When the liquid flows through the driving impeller 160, it can drive the driving impeller 160 to rotate. As Figure 3 and Figure 4 shown, the first transmission wheel 170 is coaxially arranged with the driving impeller 160. The first transmission wheel 170 is located outside the housing 100. The first transmission wheel 170 and the driving impeller 160 rotate synchronously. The second transmission wheel 180 is coaxially and fixedly connected to the rotating disk 200. The first transmission wheel 170 and the second transmission wheel 180 are connected by a belt 190. When the driving impeller 160 drives the first transmission wheel 170, the first transmission wheel 170 drives the second transmission wheel 180 to rotate through the belt 190, and the second transmission wheel 180 drives the rotating disk 200 to rotate.

[0041] It should be noted that in this embodiment, the ratio of the radius of the first transmission wheel 170 to the radius of the driving impeller 160 is set to be the same as the ratio of the radius of the second transmission wheel 180 to the radius of the rotating disk 200. Since the first transmission wheel 170 and the driving impeller 160 are coaxially and fixedly connected, the angular velocities of the first transmission wheel 170 and the driving impeller 160 are the same. Since the first transmission wheel 170 and the second transmission wheel 180 are connected by a belt 190, the linear velocities of the first transmission wheel 170 and the second transmission wheel 180 are the same. Since the second transmission wheel 180 and the rotating disk 200 are coaxially and fixedly connected, the angular velocities of the second transmission wheel 180 and the rotating disk 200 are the same. When the liquid drives the driving impeller 160 to rotate and the angular velocity of the rotation is the same as the flow velocity of the liquid, the speed at which the driving impeller 160 drives the rotating disk 200 to rotate through the first transmission wheel 170 and the second transmission wheel 180 is the same as the flow velocity of the liquid.

[0042] To facilitate the connection between the second transmission wheel 180 and the rotating disk 200, the rotating disk 200 in this embodiment has an end cover 210 at the top. The end cover 210 is fixed to the top of the rotating disk 200 by bolts, and the second transmission wheel 180 is coaxially and fixedly connected to the end cover 210. The second transmission wheel 180 drives the end cover 210 and thus drives the rotating disk 200 to rotate.

[0043] It should be noted that the drive assembly in this embodiment may also have other structures, such as a speed sensor, a controller, and a drive motor. A speed sensor is installed in the channel 130 to detect the flow rate of the liquid, and then a signal is sent to the controller. The controller controls the rotational speed of the drive motor so that the linear speed at which the drive motor drives the rotating disk 200 to rotate is the same as the flow rate of the liquid. Of course, it may also be other drive structures, which are not specifically limited herein.

[0044] In a further embodiment, the free chlorine detection device in water further includes a spectrophotometer 500. A disk 510 is provided on the spectrophotometer 500. The size of the disk 510 is the same as the size of the housing 100. And a detection port 280 is opened on the friction disk 220, as Figure 2 and Figure 4 shown. The detection port 280 is specifically located below each sampling bottle 400. And when the cumulative movement distance of the sampling bottle 400 reaches the second preset distance, it can block the viewing window. At the same time, a reflecting mirror 290 is installed at a position corresponding to the detection port 280 on the lower end face of the end cover 210 of the rotating disk 200. After all the samples are mixed, the rotating disk 200 is removed from the housing 100 and installed on the disk 510 of the spectrophotometer 500. A drive shaft 520 is rotatably provided at the center of the disk 510. The drive shaft 520 can drive the rotating disk 200 to rotate so as to sequentially detect each sampling bottle 400. The emission head of the spectrophotometer 500 just corresponds to the detection port 280. The emission head emits light into the detection port 280. The light passes through the liquid mixed in the sampling bottle 400 and is reflected by the reflecting mirror 290 to the receiver, thereby reading the content of free chlorine in the sample in the sampling bottle 400. After one detection is completed, the drive shaft 520 drives the rotating disk 200 to rotate, so as to start the detection of the next sampling bottle 400.

[0045] Combined with the above embodiments, the specific working process of a free chlorine detection device in water provided by the present invention is described as follows: Fill each reagent bottle 300 with reagent, and fill the space between the piston 310 and the end of the reagent bottle 300 close to the sampling bottle 400 with the reagent. Install elastic sealing rings 420 on the inner peripheral walls of multiple sampling bottles 400, and sequentially sleeved multiple sampling bottles 400 slidably on each reagent bottle 300. Connect the end cover 210 of the turntable 200 to the turntable 200 by bolts. Connect a water source at the water inlet 110 of the housing 100. The water source enters the housing 100 through the water inlet 110 and then passes through the channel 130. When the water source passes through the channel 130, it will contact the outer wall of the turntable 200 and thus drive the turntable 200 to rotate. At this time, the adjusting screw 530 at the bottom of the housing 100 does not restrict the rotation of the friction disk 220. Therefore, the turntable 200 drives the friction disk 220 to rotate synchronously through friction. As the water source is discharged through the water outlet 120, it can push the driving impeller 160 to rotate. The driving impeller 160 drives the first transmission wheel 170 to rotate. The first transmission wheel 170 drives the second transmission wheel 180 to rotate through the belt 190. The second transmission wheel 180 drives the turntable 200 to rotate. As time increases, the linear velocity of the driving impeller 160 gradually becomes the same as the flow velocity of the water source.

[0046] When the linear velocity of the driving impeller 160 is the same as the flow velocity of the water source, since the driving impeller 160 and the first transmission wheel 170 are coaxially and fixedly connected, the angular velocities of the driving impeller 160 and the first transmission wheel 170 are the same. The first transmission wheel 170 and the second transmission wheel 180 are connected by the belt 190, so the linear velocities of the first transmission wheel 170 and the second transmission wheel 180 are the same. The second transmission wheel 180 and the turntable 200 are coaxially and fixedly connected, so the angular velocities of the second transmission wheel 180 and the turntable 200 are the same. And the ratio of the radius of the first transmission wheel 170 to the driving impeller 160 is the same as the ratio of the radius of the second transmission wheel 180 to the turntable 200. Therefore, the linear velocity of the turntable 200 is the same as the flow velocity of the water source. At this time, rotate the adjusting screw 530 so that one end of the adjusting screw 530 extends into the limiting groove 270. When the friction disk 220 rotates to the limiting plate 271 abuts against the adjusting screw 530, the friction disk 220 rotates relative to the turntable 200, and then the friction disk 220 is stationary relative to the housing 100.

[0047] Sampling: When the rotating disk 200 drives the sampling bottle 400 to rotate to the liquid suction area 140, the slider 410 on the outer periphery of the sampling bottle 400 slides within the annular slide rail 230. Specifically, it slides from the end 232 of the outermost annular slide rail 230 through the arc transition section to the starting end 231 of the adjacent inner annular slide rail 230. During this process, the sampling bottle 400 can move a first preset distance radially towards the center of the rotating disk 200. At this time, the volume of the sampling bottle 400 increases, and the two ports of the connecting pipe 360 do not contact the inner wall of the conical groove 370 of the second sealing ring 340. The sampling bottle 400 sucks water, and the water enters the sampling bottle 400 through the liquid inlet pipe 320 and the connecting pipe 360. Each time the sampling bottle 400 passes through the liquid suction area 140, it moves a first preset distance, so that it can quantitatively suck samples.

[0048] Mixing: When the slider 410 on the sampling bottle 400 moves into the second-to-last annular slide rail 230 from the outside to the inside, the cumulative distance that the sampling bottle 400 moves radially towards the center of the rotating disk 200 reaches the second preset distance at this time. As a result, the elastic sealing ring 420 on the inner wall of the sampling bottle 400 contacts the outer periphery of the second sealing ring 340. When the rotating disk 200 continues to drive the sampling bottle 400 to rotate through the liquid suction area 140, the slider 410 on the sampling bottle 400 moves from the second-to-last annular slide rail 230 to the arc transition section of the innermost annular slide rail 230. The sampling bottle 400 continues to move radially towards the center of the rotating disk 200 to quantitatively extract the reagent in the reagent bottle 300. At this time, the piston 310 in the reagent bottle 300 moves synchronously. When the rotating disk 200 drives the sampling bottle 400 to rotate into the mixing area 150, the gear 430 on the outer periphery of the sampling bottle 400 meshes with the teeth 250 on the driving ring 240 of the friction disk 220, thereby driving the sampling bottle 400 to rotate around its own axis, and then improving the mixing degree of the water source and the reagent in the sampling bottle 400. When the water sources in all the sampling bottles 400 are mixed with the reagent, the supply of the water source is stopped, so that the rotation of the rotating disk 200 is stopped, and multiple sampling bottles 400 just pass over the detection port 280. The specific state is as Figure 6 shown.

[0049] Detection: The rotating disk 200 is taken out from the housing 100 and installed on the disk 510 of the spectrophotometer 500. The emitting head of the spectrophotometer 500 can emit light into the detection port 280. The light passes through the liquid in the sampling bottle 400 and is reflected by the mirror 290 to the receiver, thereby obtaining the data of the free chlorine content in the liquid in the sampling bottle 400. After one detection is completed, the drive shaft 520 drives the rotating disk 200 to align the next detection port 280 with the emitting head for continuous detection until all the sampling bottles 400 are detected to end the detection operation.

[0050] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0051] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A device for testing free chlorine in water, characterized in that: include: A shell, wherein a water inlet and a water outlet are provided on the shell, and a liquid absorption area and a mixing area are provided inside the shell; A rotating disk, the rotating disk is rotatably disposed in the shell, the outer wall of the rotating disk and the inner wall of the shell form a channel, the channel is located in the liquid absorption area, and the liquid flows from the water inlet through the channel and then is discharged from the water outlet; A reagent bottle and a sampling bottle, wherein the reagent bottle is inserted into the outer periphery of the rotating disk along the radial direction of the rotating disk, and the sampling bottle is slidably sleeved on the outer periphery of the reagent bottle, and the sampling bottle can slide axially relative to the reagent bottle; The sampling bottle is configured such that when the rotating disk drives the sampling bottle to revolve in the liquid aspiration area and the linear speed of the rotating disk is the same as the flow speed of the liquid, the sampling bottle moves radially toward the center of the rotating disk by a first preset distance, the volume of the sampling bottle increases to absorb the liquid in the liquid aspiration area, and when the cumulative moving distance of the sampling bottle reaches a second preset distance, the sampling bottle is connected to the reagent bottle, and the reagent in the reagent bottle enters the sampling bottle; When the rotating disk drives the sampling bottle to revolve in the mixing area and the linear speed of the rotating disk is the same as the flow speed of the liquid, the sampling bottle rotates around its own axis to mix the internal liquid.

2. The free chlorine test equipment in water according to claim 1, characterized in that: A friction disk is rotatably arranged in the shell, and a plurality of annular slide rails are coaxially and fixedly arranged on the upper end surface of the friction disk. The radius of the plurality of annular slide rails gradually increases from the inside to the outside, and each annular slide rail has a notch. When the friction disk is stationary relative to the shell, the notch of each annular slide rail is located in the liquid absorption area. Among the two adjacent annular slide rails, the end of the outer annular slide rail is connected to the starting end of the inner annular slide rail in an arc. A slider is fixedly arranged on the outer periphery of the sampling bottle, and the slider is slidably arranged in the annular slide rail and gradually slides from the outer annular slide rail to the inner annular slide rail.

3. The free chlorine test equipment in water according to claim 2, characterized in that: A driving ring is coaxially and fixedly arranged on the friction disk, and teeth are arranged on the upper end surface of the driving ring located in the mixing zone. A gear is coaxially arranged on the outer periphery of the sampling bottle. The sampling bottle rotates synchronously with the gear, and the gear is meshed with the teeth.

4. The free chlorine test equipment in water according to claim 1, characterized in that: A first switch is provided on one end of the reagent bottle located inside the sampling bottle, and the first switch can connect or block the reagent bottle and the sampling bottle. A liquid inlet tube is connected to the other end of the reagent bottle, one end of the liquid inlet tube is connected to the channel, and the other end of the liquid inlet tube is connected to the sampling bottle. A second switch is provided on the liquid inlet tube, and the second switch can open or block the liquid inlet tube; The first switch and the second switch are configured such that when the sampling bottle moves a first preset distance radially toward the center of the rotating disk, the second switch opens the liquid inlet tube; when the cumulative distance moved radially toward the center of the rotating disk reaches a second preset distance, the first switch connects the sampling bottle and the reagent bottle, and the second switch blocks the liquid inlet tube.

5. The free chlorine test equipment in water according to claim 4, characterized in that: The first switch includes a first sealing ring and a second sealing ring. The first sealing ring is coaxially and fixedly arranged on one end of the reagent bottle located in the sampling bottle. The inner circumference of the first sealing ring is a conical surface. The second sealing ring is coaxially abutted on the conical surface of the inner circumference of the first sealing ring. A through groove is provided on the end surface of the second sealing ring that contacts the first sealing ring. The through groove is connected to the sampling bottle. After the sampling bottle moves radially toward the center of the rotating disk for a cumulative distance reaching a second preset distance, it can drive the second sealing ring to move axially.

6. The free chlorine testing device in water according to claim 5, characterized in that: An elastic sealing ring is provided at the sliding connection position between the reagent bottle and the sampling bottle.

7. The free chlorine testing device in water according to claim 5, characterized in that: The second switch includes a connecting tube and an elastic member, the connecting tube is vertically connected to the liquid inlet tube and the two are connected, the liquid inlet tube axially slides through the second sealing ring, a conical groove is provided on the inner circumference of the second sealing ring, the two ports of the connecting tube are adapted to the conical surface of the conical groove, the elastic member is sleeved on the outer circumference of the liquid inlet tube, one end of the elastic member is connected to the bottom of the conical groove, and the other end of the elastic member is connected to the connection position of the connecting tube and the liquid inlet tube.

8. The free chlorine testing device in water according to claim 1, characterized in that: A piston is provided in the reagent bottle in a sliding seal. The piston can move axially along the reagent bottle. A through hole is provided on one end of the reagent bottle away from the sampling bottle.

9. The free chlorine testing device in water according to claim 1, characterized in that: A driving assembly is arranged on the outer periphery of the shell, and the linear speed at which the driving assembly drives the rotating disk to rotate is the same as the speed at which the liquid flows through the channel.

10. The free chlorine testing device in water according to claim 1, characterized in that: The free chlorine testing device in water also includes a spectrophotometer. A disc is arranged on the spectrophotometer, and the size of the disc is the same as the size of the shell.

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