Automatic dosing device

Abstract

The invention relates to the technical field of dosing equipment, in particular to an automatic dosing device which comprises a device body, a circulating pump is installed in the device body, the water inlet end of the circulating pump is connected with a detection water tank, a residual chlorine monitoring sensor is installed in the detection water tank, and a water inlet hose is arranged on the detection water tank. The water outlet end of the circulating pump is connected with a three-way valve, the other two ends of the three-way valve are connected with a water return pipe and a chemical adding pipe respectively, a chemical adding box is arranged at the end, away from the three-way valve, of the chemical adding pipe, a mixing cavity is formed in the chemical adding box, and a chemical storage tank is installed on the upper side of the chemical adding box. A medicine adding assembly used for adding medicine into the mixing cavity is arranged in the medicine storage tank, and the end, away from the three-way valve, of the water return pipe is connected with a water return hose. The invention solves the problem that a hole is required to be formed in an external spraying circulation path of the closed cooling tower to take water for real-time flowing water quality detection and water treatment agent addition in the installation of the existing dosing equipment for chemical treatment of external spraying circulating cooling water of the closed cooling tower.

Description

Technical Field

[0001] This invention relates to the field of dosing equipment technology, and specifically to an automatic dosing device. Background Technology

[0002] Currently, the chemical dosing equipment used for the external spray circulation cooling water chemical treatment of closed-loop cooling towers requires the installation of water intake through openings in the external spray circulation path of the closed-loop cooling tower for real-time flow water quality monitoring and water treatment agent dosing. Installation requires shutdown and modification operations. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic dosing device to solve the problem in the prior art that the dosing equipment used for chemical treatment of external spray circulating cooling water in closed cooling towers requires the installation of openings in the external spray circulation path of the closed cooling tower to draw water for real-time flow water quality detection and water treatment agent dosing.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: An automatic dosing device includes a device body, a circulating pump installed within the device body, a detection water tank connected to the inlet of the circulating pump, a residual chlorine monitoring sensor installed in the detection water tank, an inlet hose installed on the detection water tank, a three-way valve connected to the outlet of the circulating pump, a return water pipe and a dosing pipe respectively connected to the other two ends of the three-way valve, a dosing tank installed at the end of the dosing pipe away from the three-way valve, a mixing chamber installed in the dosing tank, a storage tank installed on the upper side of the dosing tank, a dosing assembly for dosing into the mixing chamber installed in the storage tank, and a return water hose connected to the end of the return water pipe away from the three-way valve.

[0005] A further technical solution is that an elastic diaphragm is provided inside the dosing tank, with a pushing chamber and a mixing chamber on both sides of the elastic diaphragm. A first electric push rod is installed in the pushing chamber of the dosing tank, with the output shaft of the first electric push rod facing the mixing chamber. A push plate is installed at the end of the output shaft of the first electric push rod, and the push plate is connected to the elastic diaphragm in the pushing chamber.

[0006] A further technical solution is that the dosing assembly includes a second electric push rod, a connecting block is provided on the upper side of the dosing tank, and a connecting groove with its opening facing downwards is provided on the lower side of the connecting block. The groove opening is connected to the mixing chamber. The lower end of the storage tank is connected to the connecting groove through a connecting pipe. The second electric push rod is vertically installed in the storage tank through a mounting bracket. The output end of the electric push rod is set downwards, and several drug delivery rings are arranged vertically and vertically around the outer wall of the output end of the second electric push rod. An electric cover plate is provided at the connection between the lower end of the connecting pipe and the connecting groove.

[0007] A further technical solution is that the electric cover includes a fixing ring and a cover body. The fixing ring is arranged around the connecting pipe at the bottom of the connecting groove. One side of the cover body is rotatably connected to the lower edge of the fixing ring through a torsion spring hinge. An installation ring groove is provided around the lower side of the fixing ring, and an electromagnet is installed in the installation ring groove. An adsorption ring is provided on the upper side of the cover body corresponding to the position of the electromagnet, which is magnetically connected to the electromagnet in the electric state.

[0008] A further technical solution is to set the drug delivery ring at an angle downwards from the inner wall to the outer wall.

[0009] A further technical solution involves a mounting hole on the upper side of the detection tank, a locking ring at the mounting hole, an installation tube inside the detection tank at the mounting hole, a sealing cross valve at the lower end of the installation tube, an installation rod inside the installation tube, the lower end of the installation rod positioned below the installation tube, a residual chlorine monitoring sensor installed at the lower end of the installation rod, the outer wall of the upper end of the installation rod connected to the inner wall of the locking ring via a threaded connection, and a sealing ring on the upper side of the installation rod above the locking ring.

[0010] A further technical solution is that a Y-type filter, a flow switch, and a return water manual valve are sequentially installed on the return water pipe. A drain pipe is connected between the return water manual valve and the flow switch. A drain manual valve is installed on the drain pipe, and a chemical dosing hole is provided on the drain pipe. The chemical dosing hole is sealed by a sealing plug.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: By placing the inlet hose and return hose in the external spray water collection pan of the closed cooling tower, water can be directly drawn into the device body through the inlet hose without opening any holes. Then, the water flows through the circulation pump and then back to the external spray water collection pan of the closed cooling tower through the return pipe and return hose. During this process, chemicals are added to the return pipe through the chemical storage tank and chemical dosing assembly to increase the chlorine content in the cooling water, thereby achieving a sterilization effect. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of an automatic dosing device according to the present invention.

[0013] Figure 2 This is a schematic diagram of an automatic dosing device according to the present invention.

[0014] Figure 3 This is a schematic diagram of the dosing tank and storage tank of an automatic dosing device according to the present invention.

[0015] Figure 4 This is a magnified view of the area marked A.

[0016] Figure 5This is a schematic diagram of the detection water tank of an automatic dosing device according to the present invention.

[0017] Icons: 1-Device body, 2-Circulation pump, 3-Detection water tank, 4-Residual chlorine monitoring sensor, 5-Inlet hose, 6-Three-way valve, 7-Return pipe, 8-Dosing pipe, 9-Dosing tank, 10-Mixing chamber, 11-Storage tank, 12-Elastic diaphragm, 13-Push chamber, 14-First electric push rod, 15-Push plate, 16-Connecting block, 17-Connecting groove, 18-Connecting pipe, 19-Second electric push rod, 2 0- Mounting bracket, 21- Dispensing ring, 22- Fixing ring, 23- Cover plate body, 24- Torsion spring hinge, 25- Mounting ring groove, 26- Electromagnet, 27- Mounting hole, 28- Locking ring, 29- Mounting pipe, 30- Sealing cross valve, 31- Mounting rod, 32- Sealing ring, 33- Y-type filter, 34- Flow switch, 35- Return water manual valve, 36- Drain pipe, 37- Drain manual valve, 38- Dosing hole. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0019] Figures 1 to 5 The image shows an embodiment of the present invention.

[0020] Example: An automatic dosing device includes a device body 1, a circulation pump 2 installed inside the device body 1, a detection water tank 3 connected to the inlet end of the circulation pump 2, a residual chlorine monitoring sensor 4 installed inside the detection water tank 3, an inlet hose 5 installed on the detection water tank 3, a three-way valve 6 connected to the outlet end of the circulation pump 2, a return water pipe 7 and a dosing pipe 8 respectively connected to the other two ends of the three-way valve 6, a dosing tank 9 installed at the end of the dosing pipe 8 away from the three-way valve 6, a mixing chamber 10 installed inside the dosing tank 9, a storage tank 11 installed on the upper side of the dosing tank 9, a dosing assembly for dosing into the mixing chamber 10 installed inside the storage tank 11, and a return water hose connected to the end of the return water pipe 7 away from the three-way valve 6. This application places the inlet hose 5 and return hose in the external spray water collection pan of the closed-loop cooling tower. This allows water to be drawn directly from the external spray water collection pan into the device body 1 through the inlet hose 5 without opening any holes. The water then flows through the circulation pump 2 and back to the external spray water collection pan through the return pipe 7 and return hose. During this process, chemicals are added to the return pipe 7 via the chemical storage tank 11 and the chemical dosing assembly to increase the chlorine content in the cooling water, thereby achieving a sterilization effect. By setting up a detection water tank 3, residual chlorine can be detected after the water is drawn from the external spray water collection pan of the closed-loop cooling tower to determine whether chemical dosing is necessary. Currently, automatic dosing equipment uses liquid sodium hypochlorite as the oxidizing disinfectant. However, liquid sodium hypochlorite has a short shelf life (approximately 7 days) and its effectiveness decreases by about 50%. Furthermore, it requires large dosages and frequent replenishment, making operation cumbersome. This invention replaces liquid sodium hypochlorite with solid trichloroisocyanuric acid. By installing a residual chlorine detector, circulating water passes through the dosing tank 9 to dissolve the solid disinfectant before entering the closed-loop external spray cooling water system for disinfection. This solves the problems of short shelf life and frequent replenishment of liquid sodium hypochlorite.

[0021] An elastic diaphragm 12 is installed inside the dosing tank 9. A pushing chamber 13 and a mixing chamber 10 are located on either side of the elastic diaphragm 12. A first electric push rod 14 is installed in the pushing chamber 13 of the dosing tank 9. The output shaft of the first electric push rod 14 faces the mixing chamber 10. A push plate 15 is installed at the end of the output shaft of the first electric push rod 14, and the push plate 15 is connected to the elastic diaphragm 12 within the pushing chamber 13. When dosing is required, the first electric push rod 14 is controlled to move the elastic diaphragm 12. During this movement, the volume of the mixing chamber 10 changes, causing circulating water to enter the mixing chamber 10. When the volume of the mixing chamber 10 increases, the circulating water entering the mixing chamber 10 mixes and dissolves with the chemicals added by the dosing assembly. After mixing, the volume of the mixing chamber 10 is reduced to allow the mixed circulating water to enter the external spray water collection tray of the closed cooling tower. By setting the push plate 15, it is easier to drive the elastic diaphragm 12 to control the volume of the mixing chamber 10.

[0022] The dosing assembly includes a second electric push rod 19. A connecting block 16 is provided on the upper side of the dosing tank 9. A connecting groove 17 with its opening facing downward is provided on the lower side of the connecting block 16. The groove of the connecting groove 17 is connected to the mixing chamber 10. The lower end of the storage tank 11 is connected to the connecting groove 17 through a connecting pipe 18. The second electric push rod 19 is vertically installed in the storage tank 11 through a mounting bracket 20. The output end of the second electric push rod 19 is set downward, and a number of drug delivery rings 21 are arranged vertically and vertically around the outer wall of the output end of the second electric push rod 19. An electric cover plate is provided at the connection between the lower end of the connecting pipe 18 and the connecting groove 17. During the dosing process, the second electric push rod 19 controls the delivery ring 21 to move up and down within the connecting pipe 18. When it moves down, the delivery ring 21 is placed in the storage tank 11, and the medicine in the storage tank 11 enters between two adjacent delivery rings 21. After the delivery ring 21 passes through the connecting pipe 18, the medicine between the delivery rings 21 falls from between the delivery rings 21 into the connecting groove 17, and then enters the mixing chamber 10 from the opening of the connecting groove 17 to mix with the circulating water in the mixing chamber 10.

[0023] The electric cover includes a fixing ring 22 and a cover body 23. The fixing ring 22 is arranged around the connecting pipe 18 at the bottom of the connecting groove 17. One side of the cover body 23 is rotatably connected to the lower edge of the fixing ring 22 via a torsion spring hinge 24. A mounting ring groove 25 is provided around the lower side of the fixing ring 22, and an electromagnet 26 is installed in the mounting ring groove 25. An adsorption ring is provided on the upper side of the cover body 23 corresponding to the position of the electromagnet 26, which is magnetically attracted to the electromagnet 26 when it is energized. When the output shaft of the second electric push rod 19 retracts into the medicine storage tank 11 or the connecting pipe 18, the torsion spring hinge 24 will drive the cover body 23 to block the lower side of the fixing ring 22, and cooperate with the electromagnet 26 to fix the cover body 23, thus preventing circulating water from entering the medicine storage tank 11. When it is necessary to add medicine, the power to the electromagnet 26 is disconnected, allowing the output shaft of the second electric push rod 19 to smoothly enter the connecting groove 17.

[0024] The delivery ring 21 is inclined downwards from the inner wall to the outer wall. This design allows the medicine between the delivery rings 21 to fall more easily into the mixing chamber 10.

[0025] The upper side of the detection water tank 3 is provided with a mounting hole 27. A locking ring 28 is provided on the upper side of the detection water tank 3 at the position of the mounting hole 27. An installation tube 29 is installed inside the detection water tank 3 at the position of the mounting hole 27. A sealing cross valve 30 is provided at the lower end of the installation tube 29. An installation rod 31 is installed inside the installation tube 29. The lower end of the installation rod 31 is placed below the installation tube 29. The residual chlorine monitoring sensor 4 is installed at the lower end of the installation rod 31. The outer wall of the upper end of the installation rod 31 is connected to the inner wall of the locking ring 28 by a threaded connection. A sealing ring 32 is provided on the upper side of the locking ring 28 of the installation rod 31. This design facilitates the disassembly of the residual chlorine monitoring sensor 4 during use. When installing the residual chlorine monitoring sensor 4, the mounting rod 31 is directly inserted into the detection water tank 3 from the installation tube 29. The sealing cross valve 30 is used to fit against the outer wall of the mounting rod 31 to achieve a sealing effect, preventing water leakage inside and outside the water tank. At the same time, when disassembling the residual chlorine monitoring sensor 4, after the mounting rod 31 is pulled out, the sealing cross valve 30 can automatically close to achieve a sealing effect.

[0026] A Y-type filter 33, a flow switch 34, and a return water manual valve 35 are sequentially installed on the return water pipe 7. A drain pipe 36 is connected between the return water manual valve 35 and the flow switch 34. A drain manual valve 37 is installed on the drain pipe 36, and a chemical dosing port 38 is provided on the drain pipe 36, which is sealed with a sealing plug. The Y-type filter 33 can filter the circulating water to a certain extent. The flow switch 34 can monitor the circulation flow of the circulating pump 2. The return water manual valve 35 can easily control the opening and closing of the return water pipe 7. The drain pipe 36 facilitates drainage during cleaning, and the chemical dosing port 38 allows for the addition of chemicals to the discharged water, achieving a pollution-free treatment effect.

[0027] Although the invention has been described herein with reference to several illustrative embodiments, it should be understood that many other modifications and implementations can be devised by those skilled in the art, which will fall within the scope and spirit of the principles disclosed herein. More specifically, various variations and modifications can be made to the components and / or layout of the subject matter arrangement within the scope of the disclosure, drawings, and claims. Besides variations and modifications to the components and / or layout, other uses will be apparent to those skilled in the art.

Claims

1. An automatic dosing device, characterized in that, The device includes a main body (1), a circulating pump (2) is installed inside the main body (1), a detection water tank (3) is connected to the inlet end of the circulating pump (2), a residual chlorine monitoring sensor (4) is installed inside the detection water tank (3), an inlet hose (5) is provided on the detection water tank (3), a three-way valve (6) is connected to the outlet end of the circulating pump (2), a return water pipe (7) and a dosing pipe (8) are respectively connected to the other two ends of the three-way valve (6), a dosing tank (9) is provided at the end of the dosing pipe (8) away from the three-way valve (6), a mixing chamber (10) is provided inside the dosing tank (9), a storage tank (11) is installed on the upper side of the dosing tank (9), a dosing assembly for adding medicine to the mixing chamber (10) is provided inside the storage tank (11), and a return water hose is connected to the end of the return water pipe (7) away from the three-way valve (6).

2. The automatic dosing device according to claim 1, characterized in that: The dosing tank (9) is provided with an elastic diaphragm (12). The elastic diaphragm (12) has a push chamber (13) and a mixing chamber (10) on both sides. The dosing tank (9) has a first electric push rod (14) installed in the push chamber (13). The output shaft of the first electric push rod (14) faces the mixing chamber (10). A push plate (15) is installed at the end of the output shaft of the first electric push rod (14). The push plate (15) is connected to the elastic diaphragm (12) in the push chamber (13).

3. The automatic dosing device according to claim 2, characterized in that: The dosing assembly includes a second electric push rod (19), a connecting block (16) is provided on the upper side of the dosing box (9), a connecting groove (17) with the opening facing downward is provided on the lower side of the connecting block (16), the groove of the connecting groove (17) is connected to the mixing chamber (10), the lower end of the storage tank (11) is connected to the connecting groove (17) through a connecting pipe (18), the second electric push rod (19) is vertically installed in the storage tank (11) through a mounting bracket (20), the output end of the second electric push rod (19) is set downward, and a number of drug delivery rings (21) are arranged at intervals around the outer wall of the output end of the second electric push rod (19), and an electric cover plate is provided at the connection between the lower end of the connecting pipe (18) and the connecting groove (17).

4. The automatic dosing device according to claim 3, characterized in that: The electric cover includes a fixing ring (22) and a cover body (23). The fixing ring (22) is arranged around the connecting pipe (18) at the bottom of the connecting groove (17). One side of the cover body (23) is rotatably connected to the lower edge of the fixing ring (22) by a torsion spring hinge (24). A mounting ring groove (25) is arranged around the lower side of the fixing ring (22). An electromagnet (26) is installed in the mounting ring groove (25). An adsorption ring is arranged on the upper side of the cover body (23) corresponding to the position of the electromagnet (26) and magnetically connected to the electromagnet (26) in the electric state.

5. An automatic dosing device according to claim 4, characterized in that: The drug delivery ring (21) is inclined downward from the inner wall to the outer wall.

6. An automatic dosing device according to claim 1, characterized in that: The detection tank (3) has an installation hole (27) on its upper side. A locking ring (28) is provided on the upper side of the detection tank (3) at the position of the installation hole (27). An installation tube (29) is installed inside the detection tank (3) at the position of the installation hole (27). A sealing cross valve (30) is provided at the lower end of the installation tube (29). An installation rod (31) is installed inside the installation tube (29). The lower end of the installation rod (31) is placed below the installation tube (29). The residual chlorine monitoring sensor (4) is installed at the lower end of the installation rod (31). The outer wall of the upper end of the installation rod (31) is connected to the inner wall of the locking ring (28) by a threaded connection. A sealing ring (32) is provided on the upper side of the locking ring (28) of the installation rod (31).

7. An automatic dosing device according to claim 6, characterized in that: A Y-type filter (33), a flow switch (34), and a return water hand valve (35) are sequentially arranged on the return water pipe (7). A drain pipe (36) is connected between the return water hand valve (35) and the flow switch (34) on the return water pipe (7). A drain hand valve (37) is installed on the drain pipe (36). A dosing hole (38) is provided on the drain pipe (36). The dosing hole (38) is sealed by a sealing plug.

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