Effective chlorine dosage metering device

Abstract

The utility model relates to the technical field of water detection, in particular to an available chlorine dosage metering device which comprises a shell, two feeding pipelines, a measuring mechanism and a mounting mechanism, and the two feeding pipelines are symmetrically arranged at the two ends of the shell; the mounting mechanism comprises two valves, two connecting assemblies and a discharging assembly, the measuring mechanism comprises an upstream ultrasonic probe, a downstream ultrasonic probe, a digital display instrument, an insertion pipe, a fixing assembly and an electrode type residual chlorine measuring assembly, and the device adopts an electrode method and an ultrasonic time difference method and can be directly mounted on a feeding pipeline; the effective chlorine concentration and the flow can be measured in real time, the metering problem of the liquid flow and the effective chlorine concentration can be solved only through one instrument, and compared with a traditional method, the method is more direct and convenient. And meanwhile, a PTFE anticorrosive coating is adopted in the device, so that corrosion by a sodium hypochlorite solution is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of chlorine dosage metering, in particular to an effective chlorine dosage metering device. Background Art

[0002] Currently, users who use sodium hypochlorite solution for disinfection cannot accurately measure the amount of effective chlorine added. They usually install a flow meter, and then conduct daily testing of the effective chlorine concentration of the sodium hypochlorite solution. Finally, the cumulative flow is multiplied by the average effective chlorine concentration to calculate the effective chlorine dosage. Chlorine content = value measured by the residual chlorine meter * flow rate. Because the frequency of daily testing of the effective chlorine concentration of sodium hypochlorite solution is low, the average concentration meter is used, and the result obtained by this calculation method is inaccurate.

[0003] At present, a considerable number of enterprises use sodium hypochlorite generators to prepare sodium hypochlorite on site. Due to flow or equipment reasons, the effective chlorine concentration produced will fluctuate frequently, and the effective chlorine concentration of the sodium hypochlorite solution will also decrease during storage in the on-site storage tank. If the above average concentration is multiplied by the cumulative flow rate to calculate the dosage, the error will be relatively large. Therefore, a sodium hypochlorite dosage metering device is designed to measure the sodium hypochlorite dosage in real time. Utility Model Content

[0004] The purpose of the utility model is to provide a device for measuring the amount of effective chlorine to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An effective chlorine dosage metering device comprises a shell, two dosing pipes, a measuring mechanism and a mounting mechanism, wherein the two dosing pipes are symmetrically arranged at two ends of the shell;

[0007] The installation mechanism includes two valves, two connection components and a discharge component, each connection component is located between the shell and a dosing pipe, each valve is installed on a connection component, and the discharge component is installed at the lower end of the shell;

[0008] The measuring mechanism includes an upstream ultrasonic probe, a downstream ultrasonic probe, a digital display instrument, a cannula, a fixing component and an electrode-type residual chlorine measuring component. The cannula is inserted at the top of the shell, the cannula and the shell are connected by a fixing component, the electrode-type residual chlorine measuring component is installed inside the cannula, the upstream ultrasonic probe is installed at the top of the inner cavity of the shell, the downstream ultrasonic probe is installed at the bottom of the inner cavity of the shell, and the digital display instrument is fixedly installed at the top of the shell and located on one side of the cannula.

[0009] As a further solution of the utility model: The electrode - type residual chlorine measurement assembly includes a diaphragm, an anode, a cathode and an insulating mounting block. The insulating mounting block is fixedly installed inside the insertion tube. The anode is fixed at the top end of the insulating mounting block, the cathode is fixed at the bottom end of the insulating mounting block, the diaphragm is installed at the bottom end of the insertion tube, and the inside of the insertion tube is filled with electrolyte.

[0010] As a further solution of the utility model: The fixing assembly includes a mounting shell, an internal thread and an external thread. The mounting shell is fixedly installed on the housing, the mounting shell is connected to the inner cavity of the housing, the internal thread is fixed on the inner wall of the mounting shell, the external thread is fixed on the outer wall of the insertion tube, and the internal thread and the external thread are in threaded cooperation.

[0011] As a further solution of the utility model: Each connecting assembly includes a connecting pipe and a flange. The connecting pipe is fixedly installed at one end of the housing. The end of the connecting pipe away from the housing is detachably connected to the dosing pipe through the flange, and a valve is installed on the connecting pipe.

[0012] As a further solution of the utility model: The discharge assembly includes a drain hole, a plugging block, a first connecting plate, a second connecting plate and a bolt. The drain hole is installed at the bottom end of the housing, the drain hole is connected to the inner cavity of the housing, the plugging block is inserted into the inside of the drain hole, the first connecting plate is fixed at the end of the drain hole, the second connecting plate is fixed at the end of the plugging block, and the first connecting plate and the second connecting plate are fixedly connected by bolts.

[0013] As a further solution of the utility model: A sealing ring for improving the sealing effect is sleeved on the surface of the insertion tube, and the sealing ring is located below the external thread.

[0014] As a further solution of the utility model: The inner wall of the housing is provided with a polytetrafluoroethylene coating.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] 1. In this utility model, the electrode method and the ultrasonic time - difference method are adopted. The device can be directly installed on the dosing pipe, and can measure the effective chlorine concentration and the flow rate in real time. Only one instrument can solve the measurement problems of liquid flow rate and effective chlorine concentration, and it is more direct and convenient compared with the traditional method. At the same time, the device internally adopts a PTFE (polytetrafluoroethylene) anti - corrosion coating, effectively avoiding being corroded by sodium hypochlorite solution.

[0017] 2. In this utility model, valves are arranged at both the front and rear ends, and a drain hole is arranged at the bottom, which is convenient for discharging liquid. Without disassembling the instrument, the two - side valves can be closed, and after draining all the liquid, the electrodes can be unplugged for maintenance, improving the maintenance convenience and solving the problem that the maintenance of traditional instruments is generally more complex and requires cumbersome disassembly.

[0018] 3. The utility model improves the accuracy and timeliness of effective chlorine concentration measurement, facilitates users to count the dosage, and enables water supply and drainage enterprises to achieve accurate chemical dosing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the utility model Figure 1 .

[0020] Figure 2 is a schematic structural diagram of the utility model Figure 2 .

[0021] Figure 3 is a schematic internal structure diagram of the housing in the utility model.

[0022] Figure 4 is a schematic internal structure diagram of the insertion pipe in the utility model.

[0023] Figure 5 is for the utility model Figure 4 an enlarged structural diagram of part A therein.

[0024] Figure 6 is for the utility model Figure 4 an enlarged structural diagram of part B therein.

[0025] Figure 7 is for the utility model Figure 4 an enlarged structural diagram of part C therein.

[0026] Wherein: 11. Housing; 12. Connecting pipe; 13. Dosing pipe; 14. Flange; 15. Valve; 16. Upstream ultrasonic probe; 17. Downstream ultrasonic probe; 18. Digital display meter; 19. Mounting housing; 20. Insertion pipe; 21. Internal thread; 22. External thread; 23. Sealing ring; 24. Insulating mounting block; 25. Electrolyte; 26. Diaphragm; 27. Anode electrode; 28. Cathode electrode; 29. Drain hole; 30. Plugging block; 31. First connecting plate; 32. Second connecting plate; 33. Bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The principles and features of the present utility model will be described below with reference to the accompanying drawings. The examples given are only for explaining the present utility model and are not intended to limit the scope of the present utility model.

[0028] The present utility model provides the following preferred embodiments:

[0029] Embodiment 1, as Figures 1 - 7 shown, an effective chlorine dosage measuring device includes a housing 11, and also includes two dosing pipes 13, a measuring mechanism and a mounting mechanism. The two dosing pipes 13 are symmetrically arranged at both ends of the housing 11;

[0030] The installation mechanism includes two valves 15, two connection components and a discharge component. Each connection component is located between the housing 11 and a dosing pipeline 13. Each valve 15 is installed on a connection component. The housing 11 and the two dosing pipelines 13 can be connected by the two connection components to realize the installation of the device. The discharge component is installed at the lower end of the housing 11 and is used to discharge the liquid inside the housing 11 to facilitate subsequent maintenance.

[0031] The measuring mechanism includes an upstream ultrasonic probe 16, a downstream ultrasonic probe 17, a digital display instrument 18, an insertion tube 20, a fixing component and an electrode type residual chlorine measuring component. The insertion tube 20 is inserted into the top of the housing 11, and the insertion tube 20 and the housing 11 are connected by the fixing component. The electrode type residual chlorine measuring component is installed inside the insertion tube 20. The upstream ultrasonic probe 16 is installed at the top of the inner cavity of the housing 11, and the downstream ultrasonic probe 17 is installed at the bottom of the inner cavity of the housing 11. The digital display instrument 18 is fixedly installed at the top of the housing 11 and on one side of the insertion tube 20. Specifically, the upstream ultrasonic probe 16, the downstream ultrasonic probe 17, the digital display instrument 18 and the electrode type residual chlorine measuring component are all electrically connected to the controller. Through the upstream ultrasonic probe 16 and the downstream ultrasonic probe 17, the velocity and flow rate of the fluid can be calculated according to the propagation time difference of ultrasonic waves in the forward and reverse directions in the liquid. The electrode type residual chlorine measuring component collects the effective chlorine concentration data. The controller can collect the flow rate and effective chlorine data in real time, calculate and feedback to the digital display instrument 18 in real time, and display through the digital display instrument 18: cumulative flow rate, instantaneous flow rate, instantaneous effective chlorine concentration, cumulative effective chlorine dosage.

[0032] That is, the device adopts the electrode method and the ultrasonic time difference method, can be directly installed on the inlet or outlet pipeline, can measure the effective chlorine concentration and the flow rate in real time, and only one instrument is needed to solve the measurement problems of liquid flow rate and effective chlorine concentration, and is more direct and convenient than the traditional method.

[0033] As Figures 1 - 7 shown, the electrode type residual chlorine measuring component includes a diaphragm 26, a positive electrode 27, a negative electrode 28 and an insulating mounting block 24. The insulating mounting block 24 is fixedly installed inside the insertion tube 20. The positive electrode 27 is fixed at the top of the insulating mounting block 24, and the negative electrode 28 is fixed at the bottom of the insulating mounting block 24. The diaphragm 26 is installed at the bottom of the insertion tube 20, and the inside of the insertion tube 20 is filled with an electrolyte 25. Specifically, a gas-permeable film is covered on the negative electrode 28, and this sensing layer can react with residual chlorine and generate a potential change. When residual chlorine exists in water, it will undergo an oxidation-reduction reaction with the chemical substances in the sensing layer. This reaction causes a potential change on the electrode, and this change is proportional to the concentration of residual chlorine in water.

[0034] The residual chlorine in the measured liquid diffuses through the diaphragm 26 to the cathode 28. An appropriate polarization voltage between the cathode 28 and the anode 27 can reduce the residual chlorine on the cathode 28. These chemical reactions generate a current proportional to the residual chlorine in the measured solution.

[0035] As Figures 1 - 7 shown, the fixing component includes an installation shell 19, an internal thread 21 and an external thread 22. The installation shell 19 is fixedly installed on the shell 11. The installation shell 19 is connected to the inner cavity of the shell 11. The internal thread 21 is fixed to the inner wall of the installation shell 19. The external thread 22 is fixed to the outer wall of the insertion tube 20. The internal thread 21 and the external thread 22 are in threaded fit;

[0036] Through the threaded fit between the internal thread 21 and the external thread 22, the insertion tube 20 can be fixed inside the installation shell 19 to realize the installation of the insertion tube 20. At the same time, it is also convenient to disassemble the insertion tube 20, which is convenient for subsequent maintenance of the electrode type residual chlorine measurement component inside the insertion tube 20.

[0037] As Figures 1 - 7 shown, each connection component includes a connection pipe 12 and a flange 14. The connection pipe 12 is fixedly installed at one end of the shell 11. The end of the connection pipe 12 away from the shell 11 is detachably connected to the dosing pipe 13 through the flange 14. A valve 15 is installed on the connection pipe 12. Through the flange 14, the connection between the connection pipe 12 and the dosing pipe 13 can be realized, so as to realize the installation of the shell 11.

[0038] As Figures 1 - 7 shown, the discharge component includes a drain hole 29, a plugging block 30, a first connecting plate 31, a second connecting plate 32 and a bolt 33. The drain hole 29 is installed at the bottom end of the shell 11. The drain hole 29 is connected to the inner cavity of the shell 11. The plugging block 30 is inserted into the drain hole 29. A first connecting plate 31 is fixed at the end of the drain hole 29. A second connecting plate 32 is fixed at the end of the plugging block 30. The first connecting plate 31 and the second connecting plate 32 are fixedly connected by the bolt 33. The drain hole 29 is used to discharge the liquid inside the shell 11. The drain hole 29 can be plugged by the plugging block 30. At the same time, through the cooperation of the first connecting plate 31, the second connecting plate 32 and the bolt 33, the connection between the plugging block 30 and the drain hole 29 can be realized;

[0039] When it is necessary to maintain the electrode type residual chlorine measurement component inside the insertion tube 20, by closing the two valves 15 before and after the shell 11 and taking out the plugging block 30 from the drain hole 29 at the same time, the liquid inside the shell 11 can flow out through the drain hole 29. That is, without disassembling the instrument, by closing the valves on both sides and draining all the liquid, the insertion tube 20 can be taken out for maintenance, solving the problem that the maintenance of traditional instruments is generally more complicated and requires cumbersome disassembly.

[0040] As Figures 1 - 7 shown, a sealing ring 23 for improving the sealing effect is sleeved on the surface of the intubation tube 20. The sealing ring 23 is located below the external thread 22 and is used to improve the sealing effect between the intubation tube 20 and the mounting shell 19.

[0041] As Figures 1 - 7 shown, a polytetrafluoroethylene coating is provided on the inner wall of the housing 11. By adopting the anti-corrosion coating of PTFE (polytetrafluoroethylene), the corrosion by the sodium hypochlorite solution can be effectively avoided and the service life can be prolonged.

[0042] The beneficial effects of the present utility model are specifically embodied as follows. The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An effective chlorine dosage metering device, comprising a housing (11), characterized in that: It also includes two dosing pipes (13), a measuring mechanism and a mounting mechanism, wherein the two dosing pipes (13) are symmetrically arranged at two ends of the housing (11); The mounting mechanism comprises two valves (15), two connection assemblies and a discharge assembly, each connection assembly is located between the housing (11) and a dosing pipe (13), each valve (15) is mounted on a connection assembly, and the discharge assembly is mounted at the lower end of the housing (11); The measuring mechanism comprises an upstream ultrasonic probe (16), a downstream ultrasonic probe (17), a digital display instrument (18), a cannula (20), a fixing assembly and an electrode-type residual chlorine measuring assembly. The cannula (20) is inserted into the top end of the shell (11). The cannula (20) and the shell (11) are connected via the fixing assembly. The electrode-type residual chlorine measuring assembly is installed inside the cannula (20). The upstream ultrasonic probe (16) is installed at the top end of the inner cavity of the shell (11). The downstream ultrasonic probe (17) is installed at the bottom end of the inner cavity of the shell (11). The digital display instrument (18) is fixedly installed at the top end of the shell (11) and is located on one side of the cannula (20).

2. The effective chlorine dosage metering device according to claim 1, characterized in that: The electrode-type residual chlorine measuring component comprises a diaphragm (26), an anode electrode (27), a cathode electrode (28) and an insulating mounting block (24); the insulating mounting block (24) is fixedly mounted inside the insert tube (20); the anode electrode (27) is fixed to the top end of the insulating mounting block (24); the cathode electrode (28) is fixed to the bottom end of the insulating mounting block (24); the diaphragm (26) is mounted on the bottom end of the insert tube (20); and the inside of the insert tube (20) is filled with an electrolyte (25).

3. The effective chlorine dosage metering device according to claim 2, characterized in that: The fixing assembly comprises a mounting shell (19), an internal thread (21) and an external thread (22); the mounting shell (19) is fixedly mounted on the housing (11); the mounting shell (19) is connected to the inner cavity of the housing (11); the internal thread (21) is fixed to the inner wall of the mounting shell (19); the external thread (22) is fixed to the outer wall of the insertion tube (20); and the internal thread (21) and the external thread (22) are threadably matched.

4. The effective chlorine dosage metering device according to claim 3, characterized in that: Each connection assembly comprises a connection pipe (12) and a flange (14); the connection pipe (12) is fixedly mounted on one end of the housing (11); the end of the connection pipe (12) away from the housing (11) is detachably connected to the dosing pipe (13) via the flange (14); and the valve (15) is mounted on the connection pipe (12).

5. The effective chlorine dosage metering device according to claim 4, characterized in that: The discharge assembly comprises a drainage hole (29), a blocking block (30), a first connecting plate (31), a second connecting plate (32) and a bolt (33); the drainage hole (29) is mounted at the bottom end of the housing (11); the drainage hole (29) is connected to the inner cavity of the housing (11); the blocking block (30) is plugged into the interior of the drainage hole (29); the first connecting plate (31) is fixed to the end of the drainage hole (29); the second connecting plate (32) is fixed to the end of the blocking block (30); and the first connecting plate (31) and the second connecting plate (32) are fixedly connected by bolts (33).

6. The effective chlorine dosage metering device according to claim 5, characterized in that: The surface of the insertion tube (20) is sleeved with a sealing ring (23) for improving the sealing effect, and the sealing ring (23) is located below the external thread (22).

7. The effective chlorine dosage metering device according to claim 6, characterized in that: The inner wall of the housing (11) is provided with a polytetrafluoroethylene coating.

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