KR100549015B1 - The differential pressure occurrence system for automatic chemicals commitment - Google Patents

Abstract

The present invention provides a main water supply pipe 2, a branch pipe 4 branched on one side of the main water supply pipe 2, a venturi 5 mounted on the branch pipe 4, and the center of the venturi 5. Concentration provided on one side of the nozzle 10 connected to the position, the chemical liquid transport pipe 7 connected to the rear of the nozzle 10, the other side of the chemical liquid transport pipe 7 and the chemical liquid transport pipe (7) A control valve 14, a chemical storage tank 3 connected to the other end of the chemical liquid delivery pipe 7, and the branch pipe 4 and the main water supply pipe 2 are provided at one end portion before joining. It relates to a differential pressure generating device for automatic chemical injection consisting of a check valve (6) for preventing the back flow, and a pressure control valve (8) provided in the main water supply pipe (2).

Chemical input device. Venturi. Branch pipe. Check valve. Drug storage tank. water pipe

Description

Differential pressure occurrence system for automatic chemicals commitment

1 is a general view of the differential pressure generating device for automatic chemical injection of the present invention

2 is a detailed view of the venturi inlet, the central nozzle and the outlet of the present invention;

Figure 3 is a detailed view of the pressure control valve scale display of the present invention

4 to 7 a state diagram using the differential pressure generating device for automatic drug injection of the present invention

8 to 12 pressure measurement results of each part of the differential pressure generating device for automatic chemical injection of the present invention

<Brief Description of Drawings>

Pump (core, pumping water) (1), water pipe (2), chemical storage tank (3), branch pipe (4), venturi (5), check valve (6), liquid transfer pipe (7), pressure regulating valve (8), drainage tank (reservoir tank) (9), injection nozzle (10), vortex generating groove (11), shadle (12), pressure gauge (13), concentration control valve (14).

The present invention is equipped with a venturi on the branch branched from the water pipe and connected to the suction nozzle connected to the venturi in-situ nozzle in the drug storage tank to the drug is introduced into the suction principle, this is again the branch confluence pipe connected to the back of the water pipe valve It relates to a differential pressure generating device for automatic chemical injection is to be combined with the fluid flowing through the water pipe.

In general, the principle of inhalation using venturi is easily understood when there is scientific common sense. In the meantime, it was not possible to apply the venturi to the water supply pipe except for special cases such as supplying gasoline from car fuel system. In this case, the pressure rises 4 times compared to the existing pressure, which causes problems such as pump load or water pipe breakage. Therefore, the introduction of sodium hypochlorite or water-soluble chemicals into a water pipe using a metering pump having a pressure greater than the pressure in the water pipe has been mainly used. When a pressure metering pump is not used, a drainage tank that does not require pressure ( Chemicals have been added from the reservoir). In case of using the above pressure metering pump, the management problems such as electric energy consumption and mechanical failure are not possible.The chemical injection method into the drainage tank is mainly thrown or dissolved by the solid dropping method. There was no problem, but the drainage tank (water reservoir) was located in the highlands, and there was inconvenience in replenishing chemicals. Therefore, as a substitute for this, there is a device for adding a proportional drug to Korea Patent Registration Publication No. 10-0472834. The technical feature of this device is that “the suction force is generated by the vacuum and vortex phenomena formed on the back of the nozzle by protruding the suction nozzle pipe into the water pipe,” and the liquid chemical is introduced just before the water pipe outlet where the flow rate increases as the pressure decreases. This is the same as the mosquito jet ejection principle (ejector) that ejects into the mouth by piggybacking the flow rate generated in the tank inlet and outlet pipe rather than using the differential pressure. This means that in the presence of pressure in the conduit, the input cannot be made and the conduit must be connected immediately before the intake conduit in the drainage water tank located in the highlands. This method is difficult to procure liquid chemicals because it is not installed in the low-cost well-managed temple and the drainage tank (reservoir tank) is located on the hillside of the terrain. In addition, the drainage tank (reservoir tank) is installed in the open air, and in the winter, the chemical injection tube always contains the chemical liquid, which may freeze in case of cold and may not be able to input the medicine.

There have been many studies to supplement this point.

For example, Korean Patent Registration No. 10-495146, Republic of Korea Utility Model Publication No. 0128273, Korean Patent Publication No. 20-165133, Korean Patent Registration No. 20-245661 are venturi pipes It is described in the method of adding the medicine

Korean Patent Application No. 10-2005-0011863 There is a non-powered calcium hypochlorite input device using fluid kinetic energy in the water pipe, which can dissolve calcium hypochlorite and put it in the water pipe inside the pipe, This problem should be installed with a suction pipe of at least ø15, and therefore, a backflow check valve should be installed, and because the primary branch pipe for chemical dissolution is installed separately from the venturi branch pipe, pressure distribution and fluctuation caused by the two branch pipes There is a problem that the suction is not constant and therefore the venturi suction effect only appears when the valve of the main water supply pipe is blocked. For this reason, when the main water pipe valve is closed in a large part, the pressure rise of the main water pipe occurs, and when the pressure rises, it affects the pressure load on the water pump and the life of the pump. Therefore, a new method of using the Venturi input principle but not burdening the cardiac pump is needed.

The present invention is to solve the problems as described above, the present invention is to install a branch pipe in the main water pipe to solve the problems caused by the pressure rise when using only Venturi, automatic structure improved to install a venturi on one side of the branch pipe It is a technical task of the present invention to provide a differential pressure generating device for chemical injection.

In more detail, the present invention generates a venturi suction force using only one branch pipe just before the valve in the main water pipe, and if connected to the valve immediately after the main water pipe valve, the quadruple lift may occur when the venturi is directly mounted on the water pipe. In order to escape the water pressure risk, the pressure rises up to about 1.5 times to generate suction force in the branch venturi, allowing the aqueous solution to be injected without force.

In order to achieve the above object, the present invention in order to inject the drug into the main water supply pipe (2) pressure venturi (5) is installed in the branch pipe branch branched from the main water pipe (5) Venturi central predetermined position The chemical liquid delivery pipe (7) connected to the nozzle (10) and the nozzle is connected to the chemical storage tank (3) via the concentration control valve (14), and the automatic chemical agent formed with the pressure control valve (8) immediately before the joining pipe connected to the venturi. It relates to a differential pressure generating device for input.

The present invention relates to a device capable of injecting an aqueous solution drug by the principle of suction by the differential pressure by using a branch pipe venturi branched from the water pipe in the introduction of the water pipe chemicals, mainly chlorine re-introduction into the chemical input of the water pipes of the liver and water And it can also be used for branch water pipes by pumping pumping chemicals in the reservoir, and on the other hand, it can also be useful when adding the necessary water treatment additives such as rust inhibitors. The chemical input device according to the present invention is a pressure difference generated on the left and right side of the venturi when the fluid flows to the branch pipe venturi branched from the water supply pipe without using the power that has been injected into the metering pump so far, the pressure is lowered on one side, and the fluid flow is faster and the vacuum and It is characterized in that the drug is sucked into the nozzle connected to the position using the vortex generated.

In order to dissolve the existing calcium hypochlorite, an additional branch pipe is used, and thus, suction force is generated only by closing the main water pipe valve by pressure distribution and dispersion by 70%. Only one branch pipe connected to the main water pipe should be adopted, and Venturi will make the internal structure different from the inlet and the outlet to maximize the differential pressure effect.In addition, the joining position of the conduit branch pipe should be connected immediately after the main water pipe valve. In principle, the branch conduit pipe is connected vertically for the purpose of construction, but it can be joined at a 45 ° angle to reduce the flow friction pressure so that the chemical inlet can smoothly join the main water supply pipe. The branched water inhaled with the drug is able to join the main water without resistance.

On the other hand, there are generally methods of using the pressure difference due to the change of the flow cross-sectional area, such as orifice and venturi, but the least flow pressure resistance is Venturi. Therefore, the pressure of the main water supply pipe and the branch pipe is appropriately used, but this is the venturi mounted on the branch pipe. It is a feature of the present invention to inject the medicine by the principle of inhalation,

The present invention can be used in the medicine material input device of the wide area water pipes more widely in the pressure pipe water pipes inherent pressure without burdening the heart pump or pressure pump and other coagulants. It can also be used as a technology that can be used when water treatment chemicals are injected into water pipes, such as office buildings. In addition, it is possible to add water-soluble chemicals using branch pump Venturi to water supply pipes as well as water pumps in water purification pipes as well as gwanjeongsa, and when applied to water tank inflow pipes, sodium hypochlorite and water-soluble chemicals are also used in drainage tanks. You can put in. The main objective of the present invention is a breakthrough technology capable of injecting chemicals into a water supply pipe by a differential pressure method without using a pressure metering pump that requires electricity in a water supply pipe in which pressure is embedded. And wherever there is a structural device of water pipes, such as a rooftop water tank, the branch pipe can be made and chemicals can be introduced without the mechanical device.

The present invention as described above, the chemical injection method using the venturi has the feature that it is possible to inject the chemical into the water pipe without using a metering injection pump that requires electricity, and in order to achieve this purpose, the specifications of the water pipe pressure and diameter in each site A standardized standard and model that can be applied even if different are needed.

 The water pipes that can be installed are standardized with acid resistant materials of ø25-ø125 and branch pipes of ø20, so they can be used regardless of water pipe diameter change, and the water pipes of different sizes can be different, and the water pressure is usually up to 10 If it is within ㎏f / ㎠ or when the check valve is installed in the suction pipe, it can be applied other than the above standard. Venturi (5) should be installed in parallel with the main water pipe and the inside diameter of Venturi should be 1/2 of the gradient. The inclination angle of the inlet side of Venturi is 30 ° and the inlet slope of the outlet side is 22.5 °. The inclination gradient of the inlet side is larger than the outlet side, but the length is small, and the nozzle is connected to the venturi central neck. The depth and width of the neck area is 2-3mm, so that the vacuum and vortex generation are all around the circumference. ) Is sprayed when using calcium hypochlorite. Aeration. Dissolve method such as contact method should be used in liquid state. Sodium hypochlorite can be sucked and put in sealed container as it is. Boiler besides water pipe. It can also be applied to hot water piping and other water-soluble chemicals such as cleansing agents.

In order to control the concentration according to the flow rate change when the medicine is inhaled through the venturi nozzle 10, the concentration control valve 14 is adjusted and introduced. The branched water mixed with the branched water due to the increased flow rate in the venturi 5 is mixed with the branched water. The joining pipe is re-joined to the main water pipe (2), and the pipe can be assembled or welded 90 ° vertically to the horizontal main water pipe, but can be joined using the saddle (12) and the chemical input of the pipe The branch pipe 4 may be joined to the main water pipe 2 at a 45 ° angle so that the water can be smoothly combined with the main water and frictional resistance. The pressure control valve 8 of the main water supply pipe 2 should be installed so that the fluid in the confluence pipe can be combined without resistance in the main water supply pipe or branched into the branch pipe 4. Other shut-off valves may be used, but one side of the pressure regulating valve 8 is provided with a scale as shown in FIG. 3 so as to adjust the chemical input amount and operate the device within the allowable pressure. The pressure rise should be known, so that inhalation with branch venturi should be within a maximum of 1: 1.5 at the normal pressure of the main water pipe.

The present invention (differential pressure generating device for automatic chemical injection) can be injected into the constant fluid supplied to the drainage tank (water tank) through the water pipe without applying a load to the pump (1),

The rate of drug reduction in the input of drugs. Temperature. light. Depending on the water quality, the proper amount of chemical input can be adjusted to the amount of injected chemical by adjusting the pressure in the water supply pipe with a pressure control valve and adjusting the concentration control valve, and can be used in the system using a measuring sensor. It is possible.

Experimental Example

Experimental condition

Submersible motor: 2HP (1.5KW)

Water source: ø25

Branch pipe: ø25

Venturi: Inlet ø25, Middle wood ø13, Water outlet ø25

Pressure regulating valve: 3 division division

As shown in Fig. 3, the pressure control valve 8 was passed through the apparatus at a flow rate according to different pressures according to the scales 0, 1, 2, and 3 to test the pressure change in the pipe. It should be within a maximum of 1: 1.5 at normal pressure.)

Table 1

Pressure regulating valve scale position Pressure (kgf / ㎠) Remarks (ℓ / mim) A B C D E 0 0.5 0.2 0.42 0.45 0.35 73 One 0.7 0.4 0.6 0.47 0.35 69.8 2 1.1 0.8 0.92 0.5 0.4 68.7 3 1.8 1.6 1.6 0.5 0.5 66.6

The experimental results (Table 1) and the test report data of public institutions show that the pressure increases rather than the inlet when the venturi uses the branch pipe due to the slight increase in pressure compared to that without using the branch pipe venturi.

It can be seen that the opposite phenomenon occurs when using only conventional Venturi.

Therefore, the present invention indirectly shows that the constant pressure supplied to the constant fluid supplied to the drainage tank or the reservoir through the water supply pipe without applying a load to the pump 1 can be indirectly shown.

Hereinafter, the apparatus of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a general view of the chemical injection device of the present invention, Fig. 2 is a detailed view of the venturi inlet, the central nozzle, and the outlet pipe of the present invention, Fig. 3 is a detailed view of the pressure control valve of the present invention, and Figs. 8 to 12 are diagrams showing pressure measurement results of the respective parts of the chemical injection device of the present invention. The pump (seed and pump) (1), water pipe (2), chemical storage tank (3), and minute Engine (4), venturi (5), non-return check valve (6), chemical transfer pipe (7), pressure regulating valve (8), drain water tank (water reservoir) (9), injection nozzle (10), vortex generation It can be seen that the groove 11, the saddle 12, the pressure gauge 13, and the concentration control valve 14 are shown.

Looking at the structure as shown in Figures 1 to 6, the main water supply pipe (2) having a pump (1) at one end, a branch pipe (4) branched on one side of the main water supply pipe (2), Venturi 5 mounted on the branch pipe 4, a nozzle 10 connected to a predetermined position in the center of the venturi 5, a chemical transport tube 7 connected to the rear of the nozzle 10, and the chemical liquid A concentration control valve 14 provided at one end of the transfer pipe 7, a chemical storage tank 3 connected to the other end of the chemical transfer pipe 7, the branch pipe 4, and a main water supply pipe; It is a structure of a differential pressure generating device for automatic chemical injection, which is provided with a check valve (6) and a pressure control valve (8) provided in the main water supply pipe (2) before (2) is joined.

By using the differential pressure generating device for automatic chemical input having the above configuration, the drainage tank (reservoir tank) is not supplemented and maintained due to its location in the highlands, whereas the product is often left unattended. It can be commercialized in the official pipe of the company can increase the convenience of management and can be used if the water pipe inherent the pressure in other local water supply and the water pipe that the pumped fluid is transferred to the reservoir containing the fluid without the water pipe by using a pressurized pump You can also inject chemicals that generate differential pressure. The drug can be used either by using sodium hypochlorite in a storage tank or after dissolving calcium hypochlorite tablets. The biggest effect of the invention is that the internal pressure of the water pipe increases 4 times when the venturi is installed in the main water pipe, but it was not practical. It is said that the Venturi suction can be generated and used only by boosting pressure of less than 1: 1.5 using the branch venturi. When a certain flow rate is transferred by the cardiac pump or the pressurized pump, a valve should be mounted on the main water supply pipe so that an appropriate amount of chemical is introduced through the branch pipe venturi, and the valve lock should be marked with a scale, thereby adjusting the pressure in the main water supply pipe. The amount of inhalation can be adjusted, and thus the dosage of the chemical liquid can be changed so that the concentration of the drain can be adjusted. Therefore, in the present invention, the Korean Patent Application No. 10-2005-0011863, which is previously applied to the calcium hypochlorite chemical injection device using fluid kinetic energy in the water pipe, pressure is dispersed in two branch pipes and the inflow to the branch pipe venturi is insufficient due to the supply of dissolved water. While the suction occurs when the valve is locked at least 70%, the present invention has a 30% locking, which causes suction of the branch pipe venturi. Therefore, the chlorine chlorine is prevented through the hose even without the check valve at the nozzle inlet without using the insertion nozzle. You can get the effect that you can put. On the other hand, it can be applied to the high-water drainage tank. If the venturi branch pipe is installed in the water tank inlet pipe, the nozzle is inserted just before the water pipe outlet pipe. The Venturi differential pressure method, which is completely different from the patent registration 10-0472834, can be applied to the drainage tank.

Claims (3)

In the differential pressure generating device for automatic chemical injection, The main water supply pipe 2 with the pressure, the branch pipe 4 branched to one side of the main water supply pipe 2, the venturi 5 attached to the branch pipe 4, and the center of the venturi 5 are predetermined. A nozzle 10 connected to the position, a chemical transfer tube 7 connected to the rear of the nozzle 10, a concentration control valve 14 provided at one end of the other end of the chemical transfer tube 7, and the A chemical storage tank 3 connected to the other end of the chemical transfer pipe 7, a backflow prevention check valve 6 provided at one end of the branch pipe 4 and the main water supply pipe 2 before joining the branch pipe 4 and the main water supply pipe 2; And a pressure regulating valve (8) provided in the main water feed pipe (2) of the chemical liquid transport pipe (7). The diameter of the branch pipe is ø20, but can be changed according to the main water pipe standard, using acid-resistant material, the venturi 5 provided on one side of the branch pipe has a diameter of ø20, the center The diameter of the neck is 1/2 of the diameter of the inlet, but the slope of the inlet is larger than that of the outlet, but the length is smaller, and the central neck has a 2-3 mm circular groove and the nozzle is connected to it. Pressure generator for automatic chemical injection The method according to claim 1, the branch pipe can be installed irrespective of the specifications of the main water pipe, the vertical pipe when the branch pipe is joined to the water pipe can be set to 45 kW so that the chemical input water is well mixed and the main water pipe with the pressure control valve (8) Chemical injection volume can be controlled by the pressure control and concentration control valve (14) of the chemical liquid transport pipe (7), can be used in water pipes such as pipes and drainage tanks (reservoir tank), can be applied to the system using the measurement sensor Differential pressure generator for automatic chemical injection into which sodium chlorate and water-soluble chemicals can be injected.

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