Sodium hypochlorite adding device

Abstract

The utility model belongs to the technical field of water supply, and discloses a sodium hypochlorite adding device which comprises a main box body and an electric cabinet, a liquid adding pipe is arranged on the main box body, an exhaust pipe in the vertical direction is arranged at an inlet of the liquid adding pipe, and a liquid level sensor is arranged in the exhaust pipe; the other end of the liquid adding pipe is communicated with a tap water pipe through a first pipeline and a second pipeline which are connected in parallel; a first chlorination pump and a second chlorination pump are respectively arranged on the first pipeline and the second pipeline; a liquid sensor is arranged at the bottom in the main box body, and a chlorine gas sensor and a fan are arranged on the inner wall of the main box body; the output ends of the liquid level sensor, the liquid sensor and the chlorine gas sensor are respectively connected with the first input end, the second input end and the third input end of a PLC (Programmable Logic Controller) control module in the electric cabinet; and the output end of the PLC control module is connected with the control ends of the first chlorination pump, the second chlorination pump and the fan. The operation reliability of the device is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to water supply technical field, concretely relates to a sodium hypochlorite dosing device. BACKGROUND

[0002] Sodium hypochlorite is used as the oxidizing disinfectant in the production process of waterworks, has strong oxidizing property, can effectively destroy the cell wall, cell membrane and enzyme system of microorganism, thereby achieving the effect of sterilization and algae killing, and simultaneously has the ability of continuous disinfection, so is widely selected for the disinfection process of waterworks.

[0003] In the production process of waterworks, the residual chlorine value of finished water usually needs to be kept between 0.3 and 2.0, and the common sodium hypochlorite feeding system currently includes dispensing equipment, variable frequency feeding pump, flowmeter and finished water residual chlorine instrument; the sodium hypochlorite dosing device may cause gas accumulation in the chlorination pipe during use, so that the liquid medicine cannot be normally dosed, and in addition, the sodium hypochlorite dosing device may have sudden conditions such as too high concentration of sodium hypochlorite volatile gas in the equipment cabinet or sodium hypochlorite solution leakage during operation, and in addition, the existing feeding mode is generally divided into manual feeding and automatic feeding: the traditional manual feeding relies on the waterworks operating personnel to manually adjust the feeding pump frequency according to experience to adjust the sodium hypochlorite feeding amount, and this mode has the problems of long dispensing time, low labor efficiency and high experience requirement, and is prone to cause the residual chlorine value of finished water to be substandard due to human negligence or experience misjudgment; the automatic feeding adjusts the sodium hypochlorite feeding amount through the automatic dosing equipment, and although the automatic feeding has higher theoretical precision, it has poor adaptability and is difficult to adapt to feeding with a large flow range. SUMMARY

[0004] The utility model overcomes the deficiencies in the prior art, and aims to solve the technical problem of providing a sodium hypochlorite dosing device to improve the operation reliability and flexibility of the device.

[0005] To solve the above technical problems, the utility model adopts the technical scheme of a sodium hypochlorite dosing device, comprising: a main box body and an electric control box, a liquid feeding pipe is arranged on the main box body, the liquid feeding pipe is used for connecting a sodium hypochlorite storage barrel, a gas exhaust pipe along the vertical direction is arranged at the inlet of the liquid feeding pipe, and a liquid level sensor is arranged in the gas exhaust pipe; the other end of the liquid feeding pipe is communicated with a tap water pipe through a parallelly connected first pipeline and second pipeline, and a first chlorination pump and a second chlorination pump are arranged on the first pipeline and the second pipeline respectively.

[0006] The inner bottom of the main box body is provided with a liquid sensor, and the inner wall of the main box body is provided with a chlorine gas sensor and a fan; the output ends of the liquid level sensor, the liquid sensor and the chlorine gas sensor are respectively connected with the first input end, the second input end and the third input end of the PLC control module in the electric control box, and the output end of the PLC control module is connected with the control ends of the first chlorine adding pump, the second chlorine adding pump and the fan.

[0007] The liquid level sensor is a proximity switch.

[0008] Both ends of the first pipeline and the second pipeline are further respectively provided with a first branch and a second branch, and the first branch and the second branch are provided with manual valves.

[0009] The sodium hypochlorite dosing device further comprises a power module and a control circuit, the power module is used for converting an external power supply into a direct current power supply and then supplying power to the PLC control module, and the control circuit comprises an intermediate relay KA1, an intermediate relay KA2, an intermediate relay KA3, a contactor KM1, a contactor KM2 and a contactor KM3, one end of the intermediate relay KA1, the intermediate relay KA2 and the intermediate relay KA3 is respectively connected with the output terminals O0.0, O0.1 and O0.2 of the PLC, and the other end is connected with the negative pole of the power module, and the output terminal 2L+ of the PLC is connected with the positive pole L+ of the power module.

[0010] The contact of the intermediate relay KA1 is connected in series with the coil of the contactor KM1, the contact of the intermediate relay KA2 is connected in series with the coil of the contactor KM2, the contact of the intermediate relay KA3 is connected in series with the coil of the contactor KM3, and the power terminals of the first chlorine adding pump, the second chlorine adding pump and the fan are connected with the power supply through the contacts of the contactor KM1, the contactor KM2 and the contactor KM3.

[0011] One end of the contact of the intermediate relay KA1 is further connected with the fourth input end of the PLC control module, and the intermediate relay KA2 is further connected with the fifth input end of the PLC control module.

[0012] The sodium hypochlorite dosing device further comprises a DA module and an isolation transmitter, and the control signals output by the output end of the PLC control module are connected with the control ends of the first chlorine adding pump, the second chlorine adding pump and the fan through the DA module and the isolation transmitter.

[0013] The sodium hypochlorite dosing device further comprises an alarm module, and the output end of the PLC control module is further connected with the alarm module.

[0014] The liquid adding pipe, the first pipeline and the second pipeline are metal pipelines, and the inner walls of the liquid adding pipe, the first pipeline and the second pipeline are provided with a polytetrafluoroethylene coating.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1、The utility model provides a sodium hypochlorite dosing device, through setting up exhaust pipe at liquid adding pipe entrance, not only can realize intuitive display and gas discharge of medicament liquid level, moreover, utilize liquid level sensor in exhaust pipe, can realize low liquid level alarm;

[0017] 2、In addition, the utility model adopts double -pipe double -pump operation, has increased the flow regulation range of automatic dosing of medicament;

[0018] 3、The utility model discloses a liquid sensor and chlorine gas sensor in main box body can realize sodium hypochlorite volatile gas concentration too high or sodium hypochlorite solution leakage fault detection, and, utilize fan can realize a certain degree of fault self -treatment. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 For the structure of the sodium hypochlorite dosing device provided in the utility model embodiment shows a brief diagram;

[0020] Figure 2 For the circuit structure block diagram of the sodium hypochlorite dosing device provided in the utility model embodiment;

[0021] Figure 3 It is the circuit principle diagram of control loop;

[0022] Figure 4 It is the circuit principle diagram of main loop.

[0023] In the drawing: 1 is main box, 2 is electric control box, 3 is liquid adding pipe, 4 is sodium hypochlorite storage barrel, 5 is exhaust pipe, 6 is first pipeline, 7 is second pipeline, 8 is water pipe, 9 is first chlorine pump, 10 is second chlorine pump, 11 is chlorine gas sensor, 12 is fan, 13 is liquid sensor. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantage of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be clearly and completely described below, obviously, the described embodiment is a part of the embodiment of the utility model, instead of all the embodiment;Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the range of the utility model protection.

[0025] As Figures 1-2The utility model discloses a sodium hypochlorite dosing device, including: main box 1 and electric cabinet 2, be provided with liquid adding pipe 3 on main box 1, liquid adding pipe 3 is used for connecting sodium hypochlorite storage barrel 4, the inlet of liquid adding pipe 3 is provided with the exhaust pipe 5 along vertical direction, be provided with liquid level sensor in exhaust pipe 5, another end of liquid adding pipe 3 is connected with tap water pipe 8 through parallelly connected first pipeline 6 and second pipeline 7, first pipeline 6 and second pipeline 7 are provided with first chlorine pump 9 and second chlorine pump 10 respectively,

[0026] The inner bottom of the main box 1 is provided with a liquid sensor 13, and the inner wall of the main box 1 is provided with a chlorine gas sensor 11 and a fan 12; the output ends of the liquid level sensor, the liquid sensor and the chlorine gas sensor 11 are respectively connected with the first input end, the second input end and the third input end of the PLC control module in the electric cabinet 2, and the output end of the PLC control module is connected with the control ends of the first chlorine pump 9, the second chlorine pump 10 and the fan 12.

[0027] Specifically, in the present embodiment, the liquid level sensor is a proximity switch. When the liquid level is below the set value, the liquid level sensor sends a switch signal to the PLC control module, achieving low liquid level alarm or monitoring.

[0028] Further, in the present embodiment, the two ends of the first pipeline and the second pipeline are also respectively provided with a first branch and a second branch in parallel, and a manual valve is arranged on the first branch and the second branch. When the pipeline pressure in the liquid adding pipe 3 is large enough, the upper manual valves of the first branch and the second branch can be directly opened, and the drug delivery can be realized by the pipeline pressure itself.

[0029] As Figures 3-4As shown in the circuit principle diagram of the control loop and the main loop respectively; specifically, the sodium hypochlorite dosing device of the embodiment further comprises a power module and a control circuit, the power module is used to convert an external power supply into a 24V DC power supply and then supply power to the PLC control module; the control circuit comprises intermediate relays KA1, KA2 and KA3, contactors KM1, KM2 and KM3, one end of the intermediate relays KA1, KA2 and KA3 is connected with output terminals O0.0, O0.1 and O0.2 of the PLC respectively, and the other end is connected with the negative pole of the power module, and the output terminal 2L+ of the PLC is connected with the positive pole L+ of the power module; the contact of the intermediate relay KA1 is connected in series with the coil of the contactor KM1, the contact of the intermediate relay KA2 is connected in series with the coil of the contactor KM2, and the contact of the intermediate relay KA3 is connected in series with the coil of the contactor KM3, and the power terminals of the first chlorination pump 9, the second chlorination pump 10 and the fan 12 are connected with the power supply through the contacts of the contactors KM1, KM2 and KM3 respectively.

[0030] Further, as shown in the circuit principle diagram of the control loop and the main loop respectively; specifically, the sodium hypochlorite dosing device of the embodiment further comprises a power module and a control circuit, the power module is used to convert an external power supply into a 24V DC power supply and then supply power to the PLC control module; the control circuit comprises intermediate relays KA1, KA2 and KA3, contactors KM1, KM2 and KM3, one end of the intermediate relays KA1, KA2 and KA3 is connected with output terminals O0.0, O0.1 and O0.2 of the PLC respectively, and the other end is connected with the negative pole of the power module, and the output terminal 2L+ of the PLC is connected with the positive pole L+ of the power module; the contact of the intermediate relay KA1 is connected in series with the coil of the contactor KM1, the contact of the intermediate relay KA2 is connected in series with the coil of the contactor KM2, and the contact of the intermediate relay KA3 is connected in series with the coil of the contactor KM3, and the power terminals of the first chlorination pump 9, the second chlorination pump 10 and the fan 12 are connected with the power supply through the contacts of the contactors KM1, KM2 and KM3 respectively. Figure 3 Further, as shown in the circuit principle diagram of the control loop and the main loop respectively; specifically, the sodium hypochlorite dosing device of the embodiment further comprises a power module and a control circuit, the power module is used to convert an external power supply into a 24V DC power supply and then supply power to the PLC control module; the control circuit comprises intermediate relays KA1, KA2 and KA3, contactors KM1, KM2 and KM3, one end of the intermediate relays KA1, KA2 and KA3 is connected with output terminals O0.0, O0.1 and O0.2 of the PLC respectively, and the other end is connected with the negative pole of the power module, and the output terminal 2L+ of the PLC is connected with the positive pole L+ of the power module; the contact of the intermediate relay KA1 is connected in series with the coil of the contactor KM1, the contact of the intermediate relay KA2 is connected in series with the coil of the contactor KM2, and the contact of the intermediate relay KA3 is connected in series with the coil of the contactor KM3, and the power terminals of the first chlorination pump 9, the second chlorination pump 10 and the fan 12 are connected with the power supply through the contacts of the contactors KM1, KM2 and KM3 respectively.

[0031] Figure 3 Further, as shown in the circuit principle diagram of the control loop and the main loop respectively; specifically, the sodium hypochlorite dosing device of the embodiment further comprises a power module and a control circuit, the power module is used to convert an external power supply into a 24V DC power supply and then supply power to the PLC control module; the control circuit comprises intermediate relays KA1, KA2 and KA3, contactors KM1, KM2 and KM3, one end of the intermediate relays KA1, KA2 and KA3 is connected with output terminals O0.0, O0.1 and O0.2 of the PLC respectively, and the other end is connected with the negative pole of the power module, and the output terminal 2L+ of the PLC is connected with the positive pole L+ of the power module; the contact of the intermediate relay KA1 is connected in series with the coil of the contactor KM1, the contact of the intermediate relay KA2 is connected in series with the coil of the contactor KM2, and the contact of the intermediate relay KA3 is connected in series with the coil of the contactor KM3, and the power terminals of the first chlorination pump 9, the second chlorination pump 10 and the fan 12 are connected with the power supply through the contacts of the contactors KM1, KM2 and KM3 respectively.

[0032] Specifically, in the embodiment, the PLC control module adopts a Siemens S7-200 smart module, and in terms of electrical control, options such as working mode, control mode, sodium hypochlorite given mode, etc. are set according to actual working requirements. The sodium hypochlorite dosing pump can be single-pump or double-pump rotation operation, manual or automatic start-stop can be linked with the frequency converter and water flow, manual quantitative dosing and automatic dosing according to flow, etc. functions, which are convenient for operation personnel to flexibly apply and meet the sodium hypochlorite dosing requirements under different working conditions. An operation screen is arranged on the surface of the electrical control box, and the working mode setting and related parameter display can be realized.

[0033] Further, as shown in the circuit principle diagram of the control loop and the main loop respectively; specifically, the sodium hypochlorite dosing device of the embodiment further comprises a power module and a control circuit, the power module is used to convert an external power supply into a 24V DC power supply and then supply power to the PLC control module; the control circuit comprises intermediate relays KA1, KA2 and KA3, contactors KM1, KM2 and KM3, one end of the intermediate relays KA1, KA2 and KA3 is connected with output terminals O0.0, O0.1 and O0.2 of the PLC respectively, and the other end is connected with the negative pole of the power module, and the output terminal 2L+ of the PLC is connected with the positive pole L+ of the power module; the contact of the intermediate relay KA1 is connected in series with the coil of the contactor KM1, the contact of the intermediate relay KA2 is connected in series with the coil of the contactor KM2, and the contact of the intermediate relay KA3 is connected in series with the coil of the contactor KM3, and the power terminals of the first chlorination pump 9, the second chlorination pump 10 and the fan 12 are connected with the power supply through the contacts of the contactors KM1, KM2 and KM3 respectively. Figure 2 ​As shown, the sodium hypochlorite dosing device of the embodiment further comprises an alarm module, and the output end of the PLC control module is further connected with the alarm module.

[0034] Further, in the embodiment, the liquid adding pipe 3, the first pipeline 6 and the second pipeline 7 are metal pipelines, and the inner walls of the pipelines are provided with polytetrafluoroethylene coating. The material has good chemical stability, and can slow down the generation of sodium hypochlorite crystals. In addition, the pipelines are easy to clean after crystallization compared with traditional metal pipe fittings.

[0035] Further, in the embodiment, the control circuit further comprises an intermediate relay KA4, one end of the intermediate relay KA4 is connected with the output terminal O0.3 of the PLC, the other end is connected with the negative electrode of the power module, and the two ends of one contact of the intermediate relay KA4 are connected with the two control ends of the first chlorination pump 9, and the two ends of the other contact are connected with the two control ends of the second chlorination pump 10. Then, the intermediate relay KA4 can be controlled by the PLC control module output signal, and the first chlorination pump 9 and the second chlorination pump 10 are controlled to realize external control locking.

[0036] The working principle of the utility model is as follows: the liquid medicine in the sodium hypochlorite storage barrel 4 enters the pipeline in the dosing device through the liquid adding pipe 3, and then enters the tap water pipe through the first pipeline 6 and / or the second pipeline 7 under the action of the first chlorination pump 9 and / or the second chlorination pump 10, so as to realize the dosing of sodium hypochlorite. The exhaust pipe 5 arranged at the inlet of the liquid adding pipe 3 is a transparent pipe, which can realize the monitoring of the liquid level of the liquid medicine and the discharge of the gas in the pipeline. In addition, the liquid level sensor arranged on the exhaust pipe 5 can realize low liquid level alarm. When the liquid level of the liquid medicine is lower than the set value, the liquid level sensor outputs a signal to the PLC control module, the PLC control module controls the alarm module to alarm, and reminds the operator to add medicine, so as to avoid that the liquid level of sodium hypochlorite is too low to cause the equipment to inhale, and the liquid medicine cannot be dosed. In addition, the liquid sensor 13 arranged at the bottom of the main box body 1 can monitor the pipeline leakage and other emergencies in the main box body 1, and the chlorine gas sensor 11 arranged on the inner wall of the main box body 1 can monitor the concentration of sodium hypochlorite volatile gas in the main box body 1. When the concentration is too high, the PLC control module controls the fan 12 to start, and performs exhaust operation on the main box body 1, or the alarm module alarms, and controls the first chlorination pump 9 and the second chlorination pump 10 to stop, so as to avoid safety accidents. The dosing device has been preliminarily applied in a water station. The improved dosing device has greatly improved the reliability, flexibility and convenience compared with the previous operation, and effectively helps the smooth completion of the safety production work of the water station.

[0037] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A sodium hypochlorite dosing device characterized by comprising: The utility model relates to a kind of sodium hypochlorite generator, including: Main box (1) and electric control box (2), the main box (1) is provided with liquid adding pipe (3), the liquid adding pipe (3) is used to connect sodium hypochlorite storage barrel (4), the inlet of the liquid adding pipe (3) is provided with exhaust pipe (5) along vertical direction, liquid level sensor is arranged in the exhaust pipe (5);The other end of the liquid adding pipe (3) is communicated with water pipe (8) by parallelly connected first pipeline (6) and second pipeline (7), first chlorine pump (9) and second chlorine pump (10) are respectively arranged on the first pipeline (6) and second pipeline (7); Liquid sensor (13) is arranged on the inner bottom of the main box (1), chlorine sensor (11) and fan (12) are arranged on the inner wall of the main box (1);The output of liquid level sensor, liquid sensor and chlorine sensor (11) is respectively connected with the first input, the second input and the third input of PLC control module in the electric control box (2), the output of PLC control module is connected with the control end of first chlorine pump (9), second chlorine pump (10) and fan (12).

2. The sodium hypochlorite dosing device according to claim 1, characterized in that, The liquid level sensor is a proximity switch.

3. The sodium hypochlorite dosing device according to claim 1, characterized in that, The two ends of the first pipeline and the second pipeline are also respectively provided with first branch and second branch in parallel, and manual valves are arranged on the first branch and the second branch.

4. The sodium hypochlorite dosing device according to claim 1, characterized in that, It also includes a power module and a control circuit, the power module is used to convert the external power supply into a direct current power supply to power the PLC control module, the control circuit includes intermediate relays KA1, KA2 and KA3, contactors KM1, KM2 and KM3, one end of the intermediate relays KA1, KA2 and KA3 is connected with the output terminals O0.0, O0.1 and O0.2 of the PLC respectively, and the other end is connected with the negative electrode of the power module, the output terminal 2L+ of the PLC is connected with the positive electrode L+ of the power module. The contacts of the intermediate relay KA1 are connected in series with the coil of the contactor KM1, the contacts of the intermediate relay KA2 are connected in series with the coil of the contactor KM2, and the contacts of the intermediate relay KA3 are connected in series with the coil of the contactor KM3, and the power terminals of the first chlorine pump (9), the second chlorine pump (10) and the fan (12) are connected with the power supply through the contacts of the contactors KM1, KM2 and KM3.

5. The sodium hypochlorite dosing device according to claim 4, characterized in that One end of the contacts of the intermediate relay KA1 is also connected with the fourth input of the PLC control module, and the intermediate relay KA2 is also connected with the fifth input of the PLC control module.

6. The sodium hypochlorite dosing device according to claim 1, characterized in that, It also includes a DA module and an isolation transmitter, and the control signals output by the output of the PLC control module are connected with the control ends of the first chlorine pump (9), the second chlorine pump (10) and the fan (12) through the DA module and the isolation transmitter.

7. The sodium hypochlorite dosing device according to claim 1, characterized in that, It also includes an alarm module, and the output of the PLC control module is also connected with the alarm module.

8. The sodium hypochlorite dosing device according to claim 1, characterized in that, The liquid adding pipe (3), the first pipeline (6) and the second pipeline (7) are all metal pipelines, and the inner walls thereof are provided with polytetrafluoroethylene coating.

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