CN118812041A - A central air conditioning circulating cooling water descaling device - Google Patents

Abstract

The present invention relates to the technical field of water treatment equipment, and discloses a central air-conditioning circulating cooling water descaling device, including a treatment box, two ends of the treatment box are connected and provided with a water inlet interface and a drainage interface respectively, a support ring is fixedly installed on one side of the inner cavity of the treatment box, a rotating ring is rotatably installed on one side of the support ring, an outer gear ring is fixedly installed on one side of the rotating ring, a plurality of first rotating cylinders are rotatably installed on the outer gear ring, and a driving mechanism for driving the outer gear ring to rotate is provided on one side of the treatment box. The present invention directly loads direct current to the cooling circulating water through a plurality of electrode rods, so that metal ions such as calcium and magnesium in the water are deposited near the electrode rods, and at regular intervals, the outer gear ring is rotated 180° by the driving mechanism, thereby driving the first rotating cylinder and the electrode rod to rotate 180° around the axis of the outer gear ring, so that the polarity of the electrode rod can be changed regularly, and the electric field force and redox reaction are used to help peel and remove the sediment, further reducing the formation of scale.

Description

A central air conditioning circulating cooling water descaling device

Technical Field

The invention relates to the technical field of water treatment equipment, in particular to a central air-conditioning circulating cooling water descaling device.

Background Art

The central air conditioning circulating cooling water descaling device is a device specially used to remove scale from the cooling water of the central air conditioning system. This device is essential to maintain the efficient operation of the central air conditioning system.

Chinese patent CN219860862U discloses a central air-conditioning circulating cooling water rust and descaling device, including a scale treatment box, both sides of the scale treatment box are fixedly connected to auxiliary water tanks, one side of the two auxiliary water tanks is fixedly connected to a water pipe, two water passage chambers are provided in the auxiliary water tanks, the inner wall of the water passage chamber is provided with a water passage connected to the inside of the scale treatment box, and the inner wall of the auxiliary water tank is slidably connected to two support plates. Through the coordinated use of the scale treatment box and a plurality of anode rods, the flowing cooling water is prevented from generating dirt and metal corrosion and rust under the dirt. Large particles generated by the anode rods and cooling water impurities fall into the scale treatment box for collection, so that the cooling water is constantly cleaned, and the efficiency is improved. There is no need to connect the equipment to the cooling tower or the circulating water pipe every time cleaning, and the time-consuming disassembly and installation are avoided.

As described in the above patent, when the prior art uses electrolysis to remove scale, direct current is generally directly applied to the cooling circulating water through electrode rods, thereby increasing the water's solubility and gradually dissolving the attached scale. In this process, heavy metal ions (including scale components) in the water will adhere to the surface of the electrode rods. Therefore, sediments will often adhere to the electrode rods. If the sediments adhere to the electrode rods and are not cleaned, the working efficiency of the electrodes will be affected. Therefore, the electrode rods and the treatment box need to be cleaned every period of use. Generally, this is done by manual scraping, which is difficult to clean. In addition, when there are more sediments attached to the electrode rods, direct manual scraping can easily cause damage to the electrode rods.

Therefore, it is necessary to provide a central air-conditioning circulating cooling water descaling device to solve the above technical problems.

Summary of the invention

The purpose of the present invention is to provide a central air conditioning circulating cooling water descaling device, which can clean the deposits on the electrode rods in time, effectively prevent the electrode rods from being attached with a lot of deposits and affecting the descaling effect, and does not require manual cleaning.

The above technical objectives of the present invention are achieved through the following technical solutions:

A central air-conditioning circulating cooling water descaling device comprises a treatment box, wherein two ends of the treatment box are connected and provided with a water inlet interface and a drainage interface respectively, a support ring is fixedly installed on one side of the inner cavity of the treatment box, a rotating ring is rotatably installed on one side of the support ring, an outer gear ring is fixedly installed on one side of the rotating ring, a plurality of first rotating cylinders are rotatably installed on the outer gear ring, a driving mechanism for driving the outer gear ring to rotate is provided on one side of the treatment box, a plurality of electrode rods are provided inside the treatment box; one end of the electrode rod is inserted into the first rotating cylinder, the other end of the electrode rod is connected to the first gear, an inner gear ring is fixedly installed in the inner cavity of the treatment box, the first gear is meshed with the inner gear ring, and a scraping assembly is fixedly installed inside the treatment box.

The present invention is further configured as follows: two arc-shaped conductive plates are fixedly installed inside the support ring, and the two arc-shaped conductive plates are fixedly connected by two arc-shaped insulating plates; a conductive ball is embedded in one end of the first rotating cylinder; one end of the electrode rod extending into the first rotating cylinder is in contact with the conductive ball, and the conductive ball is in contact with the arc-shaped conductive plate; connecting wires are fixedly installed on one side of the two arc-shaped conductive plates, one of the connecting wires is connected to the positive pole of the power supply, and the other connecting wire is connected to the negative pole of the power supply.

The present invention is further configured as follows: a first separation plate and a second separation plate are rotatably installed on both sides of the inner cavity of the processing box, and through holes are opened in the middle of the first separation plate and the second separation plate. A first filter is fixedly installed in the through hole of the first separation plate, and a second filter is fixedly installed in the through hole of the second separation plate. The first separation plate is fixedly connected to the outer gear ring, the first rotating cylinder passes through the first separation plate, and the first rotating cylinder rotates in cooperation with the first separation plate.

The present invention is further configured as follows: a plurality of second rotating cylinders are rotatably mounted on the second separating disk, the second rotating cylinders penetrate the second separating disk, the first gear is fixedly sleeved on the second rotating cylinders, and one end of the electrode rod is inserted into the second rotating cylinders.

The present invention is further configured as follows: the scraping assembly includes two connecting plates and a plurality of first scraping strips, and the plurality of first scraping strips are fixedly installed between the two connecting plates. When the electrode rod revolves, the outer wall of the electrode rod contacts the plurality of first scraping strips, and cooperates with the rotation of the electrode rod so that the first scraping strips scrape off the deposits attached to the electrode rod.

The present invention is further configured as follows: a mounting frame is fixedly installed inside the water inlet interface and the drainage interface, a second scraper is fixedly installed on one side of the mounting frame, and two second scrapers are respectively fitted with the first filter screen and the second filter screen.

The present invention is further configured as follows: the driving mechanism includes an installation box, a motor and a second gear, the installation box is fixedly installed on the bottom wall of the processing box, the motor is fixedly installed on one side of the installation box, the second gear is rotatably arranged in the installation box, and the second gear portion extends into the processing box and meshes with the outer gear ring, and the output end of the motor is transmission connected to the second gear.

The present invention is further configured as follows: a valve box is fixedly installed at the bottom end of the processing box, a rotating shaft is rotatably installed in the valve box, a plurality of valve plates are fixedly installed on the rotating shaft, and the plurality of valve plates are distributed in a circular array with the axis of the rotating shaft as the center of the array, one end of the rotating shaft extends into the installation box, and one end of the rotating shaft is fixedly connected to the output end of the motor.

The present invention is further configured as follows: the bottom end of the valve box is connected to a storage box, the bottom of the storage box is opened, and a sealing cover is fixedly installed at the bottom opening of the storage box.

In summary, the present invention has the following beneficial effects:

1. A central air-conditioning circulating cooling water descaling device of the present invention directly loads direct current to the cooling circulating water through a plurality of electrode rods arranged inside a treatment box, so that metal ions such as calcium and magnesium in the water are deposited near the electrode rods. At regular intervals, the outer gear ring is rotated 180° by a driving mechanism, thereby driving the first rotating cylinder and the electrode rod to rotate 180° around the axis of the outer gear ring, so that the polarity of the electrode rod can be changed regularly, and the electric field force and redox reaction are used to help peel off and remove the sediment, further reducing the formation of scale. The rotation of the electrode rod itself is also realized by the first gear meshing with the inner gear ring. This combination of revolution and rotation enables the first scraper to scrape off the sediment attached to the electrode rod, ensuring the effective removal of the sediment on the surface of the electrode rod, and can timely clean the sediment on the electrode rod, which can effectively prevent the electrode rod from being attached to a large amount of sediment and affecting the descaling effect, and no manual cleaning is required;

2. A central air-conditioning circulating cooling water descaling device of the present invention drives the first partition plate and the second partition plate to rotate while the rotating ring rotates, and cooperates with the fixedly installed first filter screen and the second filter screen, which helps to limit the sediment to be formed only between the two partition plates, and prevents the sediment from adhering to the transmission component, thereby improving the service life of the equipment, and the second scraper installed inside the water inlet interface and the drainage interface fits with the first filter screen and the second filter screen, and with the rotation of the first partition plate and the second partition plate, the filter screen can be cleaned to prevent the sediment from clogging the filter screen;

3. The present invention provides a central air-conditioning circulating cooling water descaling device, which can control not only the movement and polarity switching of the electrode rod but also the rotation of the valve plate through the motor in the driving mechanism. After the sediment settles to the valve box with the water flow, it follows the rotation of the valve plate and is discharged downward into the storage box, thereby realizing the effective separation and collection of the sediment.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the three-dimensional structure of a central air-conditioning circulating cooling water descaling device according to the present invention;

FIG2 is a schematic cross-sectional view of a central air-conditioning circulating cooling water descaling device according to the present invention;

FIG3 is a second schematic cross-sectional view of a central air-conditioning circulating cooling water descaling device according to the present invention;

FIG4 is a schematic diagram of the structure of a support ring, a first partition plate, a second partition plate and an electrode rod of a central air-conditioning circulating cooling water descaling device according to the present invention;

FIG5 is a second structural schematic diagram of a support ring, a first partition plate, a second partition plate and an electrode rod of a central air-conditioning circulating cooling water descaling device according to the present invention;

FIG6 is a schematic structural diagram of an arc-shaped conductive plate and an arc-shaped insulating plate of a central air-conditioning circulating cooling water descaling device according to the present invention;

FIG7 is a schematic cross-sectional view of a first rotating drum of a central air-conditioning circulating cooling water descaling device according to the present invention;

FIG8 is a schematic structural diagram of a scraping assembly of a central air-conditioning circulating cooling water descaling device according to the present invention;

FIG. 9 is a schematic cross-sectional view of a valve box of a central air-conditioning circulating cooling water descaling device according to the present invention.

In the figure: 1. treatment box; 101. water inlet interface; 102. drainage interface; 2. support ring; 3. rotating ring; 4. outer gear ring; 5. first separator plate; 6. electrode rod; 7. first rotating cylinder; 8. conductive ball; 9. first filter screen; 10. second rotating cylinder; 11. first gear; 12. inner gear ring; 13. second filter screen; 14. second separator plate; 15. first scraper; 16. connecting plate; 17. second scraper; 18. arc-shaped conductive plate; 19. arc-shaped insulating plate; 20. connecting wire; 21. mounting box; 22. motor; 23. second gear; 24. valve box; 25. storage box; 26. rotating shaft; 27. valve plate; 28. sealing cover; 29. mounting frame.

DETAILED DESCRIPTION

The present invention will be further described below with reference to the accompanying drawings in the embodiments of the present invention.

Please refer to Figures 1 to 9. In the embodiment of the present invention, a central air-conditioning circulating cooling water descaling device includes a treatment box 1. The treatment box 1 is a cylindrical structure. The two ends of the treatment box 1 are connected to each other and are respectively provided with a water inlet interface 101 and a drainage interface 102. A support ring 2 is fixedly installed on one side of the inner cavity of the treatment box 1. The support ring 2 is arranged on a side close to the water inlet interface 101. A rotating ring 3 is rotatably installed on one side of the support ring 2. The connection between the support ring 2 and the rotating ring 3 is sealed. An outer gear ring 4 is fixedly installed on one side of the rotating ring 3. , a plurality of first rotating cylinders 7 are rotatably mounted on the outer gear ring 4; a driving mechanism for driving the outer gear ring 4 to rotate is provided on one side of the processing box 1, a plurality of electrode rods 6 are provided inside the processing box 1, one end of the electrode rod 6 is inserted into the first rotating cylinder 7, and the electrode rod 6 is plugged into the first rotating cylinder 7, and the other end of the electrode rod 6 is connected to the first gear 11, an inner gear ring 12 is fixedly mounted in the inner cavity of the processing box 1, the first gear 11 is meshed with the inner gear ring 12, and a scraping assembly is fixedly mounted inside the processing box 1. When in use, the circulating cooling water of the central air conditioner is input into the processing box 1 through the water inlet interface 101, and the DC power is directly applied to the circulating cooling water through the electrode rod 6, thereby improving the solubility of the water and gradually dissolving the attached metal ions, so that the metal ions in the water are deposited near the electrode rod 6, thereby removing the metal ions in the cooling water to avoid the formation of scale. Part of the sediment is attached to the surface of the electrode rod 6, so the outer gear ring 4 is driven by the driving mechanism to rotate 180° at regular intervals, thereby driving the multiple first rotating cylinders 7 to rotate 180° around the axis of the outer gear ring 4 , so that the electrode rod 6 revolves in a circular trajectory, and the electrode rod 6 drives the first gear 11 to rotate when moving. Since the first gear 11 is meshed with the inner gear ring 12, the first gear 11 rotates, thereby driving the electrode rod 6 to rotate, so that the electrode rod 6 can rotate while revolving. When the electrode rod 6 passes by the scraping assembly, the scraping assembly scrapes off the sediment attached to the electrode rod 6, thereby cleaning the sediment on the electrode rod 6 in time, which can effectively prevent the electrode rod 6 from being attached to a lot of sediment and affecting the descaling effect, and no manual cleaning is required.

In this embodiment, preferably, two arc-shaped conductive plates 18 are fixedly installed inside the support ring 2, and the two arc-shaped conductive plates 18 are fixedly connected by two arc-shaped insulating plates 19. The two arc-shaped conductive plates 18 and the two arc-shaped insulating plates 19 form an annular structure. The arc-shaped conductive plates 18 are made of copper material, and the arc-shaped insulating plates 19 are made of insulating ceramic material. A conductive ball 8 is embedded and installed at one end of the first rotating cylinder 7, and the end of the electrode rod 6 extending into the first rotating cylinder 7 is in contact with the conductive ball 8. The conductive ball 8 is made of conductive material, and the conductive ball 8 is in contact with the arc-shaped conductive plate 18. A connecting wire 20 is fixedly installed on one side of the two arc-shaped conductive plates 18, one of which is connected to the positive pole of the power supply, and the other is connected to the negative pole of the power supply; 6 electrode rods 6 are provided, 3 of which are electrically connected to the positive pole of the power supply through the conductive ball 8 and the arc-shaped conductive plate 18, and the other 3 are electrically connected to the negative pole of the power supply through the conductive ball 8 and the other arc-shaped conductive plate 18. When the device is in use, the rotating ring 3 rotates 180° at regular intervals. After the rotating ring 3 rotates, the positions of the two groups of electrode rods 6 are swapped, so that the arc-shaped conductive plate 18 in contact with the electrode rods 6 is changed, and the polarity of the two electrode rods 6 is changed. During the electrolytic descaling process, heavy metal ions and scale components will gather near the cathode under the action of current to form loose scale deposits. By regularly changing the polarity of the electrodes, that is, the original cathode becomes the anode, and the anode becomes the cathode, the electric field force and the redox reaction on the electrode surface are used to peel off and remove these deposits. When the electrode polarity changes, the scale originally attached to the cathode will fall off due to the reverse action of the electric field, which can effectively reduce the deposits attached to the electrode rods 6 to reduce the difficulty of subsequent cleaning.

In the present embodiment, preferably, the first separating plate 5 and the second separating plate 14 are rotatably installed on both sides of the inner cavity of the processing box 1, and the rotating connection is sealed, the middle parts of the first separating plate 5 and the second separating plate 14 are provided with through holes, the first filter screen 9 is fixedly installed in the through hole of the first separating plate 5, the second filter screen 13 is fixedly installed in the through hole of the second separating plate 14, the first separating plate 5 is fixedly connected to the outer gear ring 4, the first rotating cylinder 7 passes through the first separating plate 5, and the first rotating cylinder 7 is rotatably matched with the first separating plate 5; a plurality of second rotating cylinders 10 are rotatably installed on the second separating plate 14, and the second rotating cylinders 10 pass through the The second separating plate 14, the first gear 11 is fixedly mounted on the second rotating cylinder 10, one end of the electrode rod 6 is inserted into the second rotating cylinder 10, and the two ends of the electrode rod 6 are respectively plugged into the first rotating cylinder 7 and the second rotating cylinder 10, so that the electrode rod 6 can be replaced, and the first separating plate 5, the second separating plate 14, the first filter screen 9 and the second filter screen 13 are arranged, so that the formed sediment can be limited between the first separating plate 5 and the second separating plate 14, and the outer gear ring 4, the inner gear ring 12 and the first gear 11 are all arranged on the outside of the first separating plate 5 and the second separating plate 14, so that the formed sediment will not adhere to these transmission structures, thereby improving the service life.

In this embodiment, preferably, the scraping assembly includes two connecting plates 16 and a plurality of first scraping strips 15, wherein the plurality of first scraping strips 15 are fixedly mounted between the two connecting plates 16, and the plurality of first scraping strips 15 are evenly distributed in an arc shape. When the electrode rod 6 revolves, the outer wall of the electrode rod 6 contacts the plurality of first scraping strips 15, and the first scraping strips 15 scrape off the sediment attached to the electrode rod 6 in coordination with the rotation of the electrode rod 6.

In the present embodiment, preferably, a mounting frame 29 is fixedly installed inside the water inlet interface 101 and the drainage interface 102, and a second scraper strip 17 is fixedly installed on one side of the mounting frame 29. The two second scraper strips 17 are respectively fitted with the first filter screen 9 and the second filter screen 13. When the outer gear ring 4 rotates, the first separating plate 5 and the second separating plate 14 can also rotate together, so that the first filter screen 9 and the second filter screen 13 can rotate, so that the second scraper strip 17 can scrape off the sediment blocked inside the mesh of the first filter screen 9 and the second filter screen 13, thereby effectively preventing the sediment from clogging the first filter screen 9 and the second filter screen 13.

In this embodiment, preferably, the driving mechanism includes an installation box 21, a motor 22 and a second gear 23, the installation box 21 is fixedly installed on the bottom wall of the processing box 1, the motor 22 is fixedly installed on one side of the installation box 21, the second gear 23 is rotatably set in the installation box 21, and the second gear 23 partially extends into the processing box 1 and meshes with the outer gear ring 4, and the output end of the motor 22 is transmission connected with the second gear 23; the output end of the motor 22 can drive the second gear 23 to rotate, and when the second gear 23 rotates, it drives the outer gear ring 4 to rotate, thereby realizing that the driving mechanism drives the outer gear ring 4 to rotate.

Please refer to Figures 3 and 9. In the embodiment of the present invention, a valve box 24 is fixedly installed at the bottom end of the processing box 1, and a rotating shaft 26 is rotatably installed in the valve box 24. A plurality of valve plates 27 are fixedly installed on the rotating shaft 26. The plurality of valve plates 27 are distributed in a circular array with the axis of the rotating shaft 26 as the array center. One end of the rotating shaft 26 extends into the installation box 21, and one end of the rotating shaft 26 is fixedly connected to the output end of the motor 22. The second gear 23 is fixedly mounted on the rotating shaft 26. When the output end of the motor 22 rotates, it can drive the rotating shaft 26 to rotate, thereby driving the second gear 23 and the valve plate 27 to rotate, so that while switching the polarity of the electrode rod 6, it can also drive the valve plate 27 to rotate. After sedimentation, the sediment will sink downward in the valve box 24. When the valve plate 27 rotates, the sediment can follow the rotation of the valve plate 27 and be discharged downward into the storage box 25, thereby separating the sediment.

This solution is driven by only one motor 22, and simultaneously realizes the rotation and revolution of the electrode rod 6, the switching of the polarity of the electrode rod 6, the cleaning of the two filter surfaces and the discharge of sediments. The synchronization between the various structures is good, and the production cost of the equipment can be significantly reduced.

In the present embodiment, preferably, the bottom end of the valve box 24 is connected to a storage box 25, the bottom of the storage box 25 is open, and a cover 28 is fixedly installed at the bottom opening of the storage box 25, and a sealing structure is provided between the cover 28 and the storage box 25 for sealing. When a lot of sediment is accumulated in the storage box 25, the cover 28 can be opened for cleaning; the top of the processing box 1 is provided with a pressure relief port and a liquid filling port, the pressure relief port can discharge the gas generated during the reaction, and cooling water can be added into the processing box 1 through the liquid filling port to replenish the water lost when the storage box 25 is cleaned.

The working principle of a central air-conditioning circulating cooling water descaling device of the present invention is as follows: In this scheme, direct current is directly applied to the cooling circulating water by means of a plurality of electrode rods 6 arranged inside a treatment box 1. This electrolysis process improves the solubility of water, so that metal ions such as calcium and magnesium in the water are deposited near the electrode rods 6. At regular intervals, the outer gear ring 4 is rotated 180° by a driving mechanism, thereby driving the first rotating cylinder 7 and the electrode rods 6 to rotate 180° around the axis of the outer gear ring 4. This action not only changes the position of the electrode rods 6, so that the polarity of the electrode rods 6 can be changed regularly (cathode becomes anode, anode becomes cathode), and uses electric field force and redox reaction to help peel off and remove deposits, further reducing the formation of scale, but also realizes the rotation of the electrode rods 6 themselves by means of the first gear 11 meshing with the inner gear ring 12. This combination of revolution and rotation enables the first scraper 15 to scrape off the deposits attached to the electrode rods 6, thereby ensuring the effective removal of the deposits on the surface of the electrode rods 6.

As the rotating ring 3 rotates, it also drives the first separating plate 5 and the second separating plate 14 to rotate, which, in conjunction with the fixedly installed first filter screen 9 and the second filter screen 13, helps to limit the sediment to be formed only between the two plates, preventing the sediment from adhering to the transmission components, thereby increasing the service life of the equipment; and the second scraper 17 installed inside the water inlet interface 101 and the drain interface 102 fits with the first filter screen 9 and the second filter screen 13. As the outer gear ring 4 rotates, the first separating plate 5 and the second separating plate 14 rotate to clean the filter screens and prevent sediment from clogging the filter screens.

The motor 22 in the driving mechanism can not only control the movement and polarity switching of the electrode rod 6, but also synchronously control the rotation of the valve plate 27. After the sediment settles to the valve box 24 with the water flow, it follows the rotation of the valve plate 27 and is discharged downward into the storage box 25, thereby achieving effective separation and collection of the sediment.

The above description is only a preferred embodiment of the present invention, so all equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims (9)

1. A central air conditioning circulating cooling water descaling device, comprising a treatment box (1), wherein two ends of the treatment box (1) are respectively connected to each other and provided with a water inlet interface (101) and a drainage interface (102), characterized in that a support ring (2) is fixedly installed on one side of the inner cavity of the treatment box (1); A rotating ring (3) is rotatably mounted on one side of the support ring (2); an outer gear ring (4) is fixedly mounted on one side of the rotating ring (3); and a plurality of first rotating cylinders (7) are rotatably mounted on the outer gear ring (4); A driving mechanism for driving the outer gear ring (4) to rotate is arranged on one side of the processing box (1), and a plurality of electrode rods (6) are arranged inside the processing box (1); One end of the electrode rod (6) is inserted into the first rotating cylinder (7), and the other end of the electrode rod (6) is connected to a first gear (11); An inner gear ring (12) is fixedly mounted in the inner cavity of the processing box (1), the first gear (11) is meshed with the inner gear ring (12), and a scraping assembly is fixedly mounted inside the processing box (1). 2. A central air-conditioning circulating cooling water descaling device according to claim 1, characterized in that: two arc-shaped conductive plates (18) are fixedly installed inside the support ring (2), and the two arc-shaped conductive plates (18) are fixedly connected by two arc-shaped insulating plates (19); a conductive ball (8) is embedded in one end of the first rotating cylinder (7); one end of the electrode rod (6) extending into the first rotating cylinder (7) is in contact with the conductive ball (8), and the conductive ball (8) is in contact with the arc-shaped conductive plate (18); a connecting wire (20) is fixedly installed on one side of the two arc-shaped conductive plates (18), one of the connecting wires (20) is connected to the positive pole of the power supply, and the other connecting wire (20) is connected to the negative pole of the power supply. 3. A central air-conditioning circulating cooling water descaling device according to claim 1, characterized in that: a first separating plate (5) and a second separating plate (14) are rotatably mounted on both sides of the inner cavity of the processing box (1), and a through hole is opened in the middle of the first separating plate (5) and the second separating plate (14), a first filter (9) is fixedly mounted in the through hole of the first separating plate (5), and a second filter (13) is fixedly mounted in the through hole of the second separating plate (14), the first separating plate (5) is fixedly connected to the outer gear ring (4), the first rotating cylinder (7) passes through the first separating plate (5), and the first rotating cylinder (7) and the first separating plate (5) are rotatably matched. 4. A central air-conditioning circulating cooling water descaling device according to claim 3, characterized in that: a plurality of second rotating cylinders (10) are rotatably mounted on the second separating disk (14), the second rotating cylinder (10) passes through the second separating disk (14), the first gear (11) is fixedly sleeved on the second rotating cylinder (10), and one end of the electrode rod (6) is inserted into the second rotating cylinder (10). 5. A central air-conditioning circulating cooling water descaling device according to claim 1, characterized in that: the scraping assembly comprises two connecting plates (16) and a plurality of first scraping strips (15), the plurality of first scraping strips (15) are fixedly installed between the two connecting plates (16), when the electrode rod (6) revolves, the outer wall of the electrode rod (6) contacts the plurality of first scraping strips (15), and cooperates with the rotation of the electrode rod (6) so that the first scraping strips (15) scrape off the sediment attached to the electrode rod (6). 6. A central air-conditioning circulating cooling water descaling device according to claim 3, characterized in that: a mounting frame (29) is fixedly installed inside the water inlet interface (101) and the drainage interface (102), and a second scraper (17) is fixedly installed on one side of the mounting frame (29), and the two second scrapers (17) are respectively fitted with the first filter screen (9) and the second filter screen (13). 7. A central air-conditioning circulating cooling water descaling device according to claim 1, characterized in that: the driving mechanism comprises a mounting box (21), a motor (22) and a second gear (23), the mounting box (21) is fixedly mounted on the bottom wall of the processing box (1), the motor (22) is fixedly mounted on one side of the mounting box (21), the second gear (23) is rotatably arranged in the mounting box (21), and the second gear (23) partially extends into the processing box (1) and meshes with the outer gear ring (4), and the output end of the motor (22) is transmission-connected to the second gear (23). 8. A central air-conditioning circulating cooling water descaling device according to claim 7, characterized in that: a valve box (24) is fixedly installed at the bottom end of the processing box (1), a rotating shaft (26) is rotatably installed in the valve box (24), a plurality of valve plates (27) are fixedly installed on the rotating shaft (26), and the plurality of valve plates (27) are distributed in a circular array with the axis of the rotating shaft (26) as the array center, one end of the rotating shaft (26) extends into the installation box (21), and one end of the rotating shaft (26) is fixedly connected to the output end of the motor (22). 9. A central air-conditioning circulating cooling water descaling device according to claim 8, characterized in that: the bottom end of the valve box (24) is connected to a storage box (25), the bottom of the storage box (25) is open, and a sealing cover (28) is fixedly installed at the bottom opening of the storage box (25).