An electrochemical device for water treatment

Abstract

The present invention discloses an electrochemical device for water treatment. An electrochemical device for water treatment includes a cleaning mechanism and a water tank. The cleaning mechanism is installed under the top plate of the water tank. The water tank is provided with a water inlet, a water outlet, a sewage outlet and an overflow port. A mounting disk is rotatably arranged on the top plate of the water tank. A plurality of cathodes are arranged under the mounting disk. Each cathode is rotated to the cleaning mechanism in sequence through a indexing mechanism. Through the cooperation of the rotation of the cathode and the lifting of the scraper, the scale on the cathode is cleaned. Compared with the collar sleeved on the cathode, the scraper of the present invention has a small contact area with the scale on the cathode and is more labor-saving during cleaning. During the electrolysis of water, the cleaning mechanism can be rotated to the horizontal direction to prevent the cleaning mechanism from being soaked in water for a long time, thereby prolonging the service life of the cleaning mechanism. A socket is provided on the cathode. Before rotating the cathode, workers can separate the cable from the cathode through the socket and the cable plug to avoid damage to the cable during the rotation of the cathode.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and specifically relates to an electrochemical device for water treatment. Background Art

[0002] Electrochemical water treatment is a technology for softening hard water. It is commonly used in a circulating water system. By electrolyzing the circulating water, calcium and magnesium ions scale on the cathode to prevent scale formation in the circulating water pipeline. After a period of use, due to scale deposition on the cathode, the treatment efficiency will decrease. Therefore, it is necessary to remove scale from the surface of the cathode rod.

[0003] In the patent with the publication number CN218435457U and the publication date of February 3, 2023, a device for cleaning cathode scale by driving a collar to lift and lower through a spiral mechanism is disclosed. However, this patent has the following disadvantages: The collar is sleeved on the cathode, with a large contact area with the scale, increasing the scraping amount, and thus increasing the scraping force, making it more laborious to drive the collar to lift and lower, and more laborious to clean the cathode scale. At the same time, the cathode will also receive a large reaction force, easily damaging the collar and the cathode. Therefore, it is necessary to design a device that is more labor-saving when cleaning cathode scale. Summary of the Invention

[0004] The purpose of the present invention is to provide an electrochemical device for water treatment to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An electrochemical device for water treatment includes a cleaning mechanism and a water tank. The cleaning mechanism is installed under the top plate of the water tank. The water tank is provided with a water inlet, a water outlet, a sewage outlet, and an overflow port. A mounting plate is rotatably arranged on the top plate of the water tank. Multiple cathodes are rotatably arranged under the mounting plate. Multiple anodes are fixed under the top plate of the water tank. The anodes are electrically connected to an electrolysis power supply. A manhole is opened on the top plate of the water tank. The mounting plate is driven by a rotation mechanism, and the rotation mechanism is installed on the top plate of the water tank. The rotation mechanism can rotate any one of the cathodes to the cleaning mechanism;

[0006] The cleaning mechanism includes a cleaning bracket and a scraper. The cleaning bracket is rotatably arranged under the top plate of the water tank. The cleaning bracket can be fixed in the vertical or horizontal direction. A cleaning lead screw is rotatably arranged on the cleaning bracket. The cleaning lead screw is threadedly connected to a cleaning slider. The cleaning slider is arranged to lift and lower on the cleaning bracket. A scraper is slidably arranged on the cleaning slider. Then the scraper is also arranged to lift and lower on the cleaning bracket;

[0007] A socket is opened on the cathode. A cable plug is detachably connected inside the socket. The cable plug is electrically connected to the electrolysis power supply. The cathode can rotate under the drive of a rotation mechanism.

[0008] Preferably, the cleaning mechanism further includes a feed track fixed to the cleaning bracket. The feed track gradually narrows from its middle to its upper and lower ends, that is, the distance from the middle of the feed track to the cathode at its upper and lower ends gradually increases. One end of the scraper is provided with a blade, and the other end is fixed with a support rod. A roller is rotatably arranged on the support rod, and the roller can roll along the feed track. A retracting spring is sleeved on the support rod, and the retracting spring can press the roller tightly against the feed track.

[0009] Preferably, the cleaning mechanism further includes a locking rod. One end of the locking rod is rotatably arranged on the cleaning bracket, and a locking hole is provided at the other end of the locking rod. The length of the cleaning bracket is L, and the length of the locking rod is l. The distance from the rotation center of the cleaning bracket and the water tank top plate to the rotation center of the cleaning bracket and the locking rod is S. The length of l satisfies the following relationship: S < l < L - S. A vertical locking seat and a horizontal locking seat are fixed under the water tank top plate. Spring pins are respectively installed on the vertical locking seat and the horizontal locking seat. When the locking hole of the locking rod is connected to the vertical locking seat through the spring pin, the cleaning bracket is fixed in the vertical direction. When the locking hole of the locking rod is connected to the horizontal locking seat through the spring pin, the cleaning bracket is fixed in the horizontal direction.

[0010] Preferably, the distance from the overflow port to the water tank top plate is h. When the cleaning bracket is fixed in the horizontal direction, the distance from the water tank top plate to the blade of the scraper is D, and the value of D ranges from 0 to h.

[0011] Preferably, the indexing mechanism includes an external gear ring coaxially fixed on the mounting plate. The external gear ring is meshed with an indexing incomplete gear. The indexing incomplete gear can drive the external gear ring to rotate once when it rotates one week, and then drive the mounting plate to rotate once, thereby rotating one cathode mounted on the mounting plate to the cleaning mechanism.

[0012] The indexing incomplete gear is rotatably arranged on the output shaft of the telescopic transmission shaft. A lower limit bracket is arranged below the indexing incomplete gear, and an upper limit bracket is arranged above the indexing incomplete gear. Both the lower limit bracket and the upper limit bracket are fixed on the water tank top plate. A driven indexing clutch sprocket is coaxially fixed below the indexing incomplete gear, and a driving indexing clutch sprocket is fixed on the output shaft of the telescopic transmission shaft. The driving indexing clutch sprocket is located below the indexing incomplete gear and above the driven indexing clutch sprocket. The output shaft of the telescopic transmission shaft is rotatably arranged on the distribution plate. When the distribution plate rises, the driving indexing clutch sprocket and the driven indexing clutch sprocket can be engaged. When the distribution plate descends, the driving indexing clutch sprocket and the driven indexing clutch sprocket can be separated.

[0013] The input shaft of the telescopic transmission shaft is driven by the main motor. The rotating mechanism further includes a spline shaft, and the main motor can also drive the spline shaft. An input gear is slidably arranged on the spline shaft, and the spline shaft is fixedly connected to the input gear in the circumferential direction. When the spline shaft rotates, it can drive the input gear to rotate. The input gear is rotatably arranged in the distribution plate. The input gear is meshed with an output gear ring. The output gear ring is rotatably arranged in the distribution plate. The output gear ring is coaxially fixed with a driving clutch jaw disc ring, and a driven clutch jaw disc ring is fixed on the cathode. The driven clutch jaw disc ring is located below the driving clutch jaw disc ring. When the distribution plate descends, the driving clutch jaw disc ring and the driven clutch jaw disc ring can be engaged. When the distribution plate ascends, the driving clutch jaw disc ring and the driven clutch jaw disc ring can be separated.

[0014] Preferably, the indexing incomplete gear is coaxially fixed with a switching incomplete gear. The switching incomplete gear is located below the indexing incomplete gear. The switching incomplete gear is meshed with a switching gear. The switching gear is coaxially installed with a switching lead screw. The switching gear is rotatably arranged on the lower limit bracket. The switching lead screw is threadedly connected with a switching slider. The switching slider is arranged on the lower limit bracket for lifting and lowering. After the indexing incomplete gear disengages from the external gear ring of the mounting disc, the switching incomplete gear and the switching gear enter into meshing. When the switching incomplete gear rotates forward, it can drive the switching gear to rotate reversely, and then drive the switching lead screw to rotate reversely, thereby driving the switching slider to descend.

[0015] A driven wedge block is fixed on the distribution plate. The driven wedge block has two inclined surfaces, which are respectively called the upper inclined surface and the lower inclined surface. The driven wedge block is pressed by a driving wedge block. The driving wedge block has two inclined surfaces, which are respectively called the upper inclined surface and the lower inclined surface. The driving wedge block is slidably arranged on the wedge block bracket. The wedge block bracket is fixed on the top plate of the water tank. A wedge block spring is arranged between the driving wedge block and the wedge block bracket. The wedge block spring can keep the driving wedge block in contact with the driven wedge block. When the lower inclined surface of the driving wedge block contacts the upper inclined surface of the driven wedge block, the distribution plate remains below. When the upper inclined surface of the driving wedge block contacts the lower inclined surface of the driven wedge block, the distribution plate remains above.

[0016] A switching pin is arranged on the distribution plate for lifting and lowering. A switching spring is arranged between the switching pin and the distribution plate. The switching spring can keep the switching pin in contact with the switching slider.

[0017] Preferably, a motor bracket is fixed on the top plate of the water tank. The input shaft of the telescopic transmission shaft is rotatably arranged on the motor bracket. The input shaft of the telescopic transmission shaft is coaxially fixed with an A gear. The A gear is meshed with a B gear. The B gear is fixed on the output shaft of the main motor. The main motor is fixed on the motor bracket. The spline shaft is rotatably arranged on the motor bracket. A C gear is coaxially fixed on the spline shaft. The C gear is meshed with the B gear.

[0018] A push-pull electromagnet is fixed under the motor support. The output shaft of the push-pull electromagnet is fixed on the distribution plate. After the push-pull electromagnet is energized, it can drive the distribution plate to rise. The push-pull electromagnet is electrically connected to the controller. Travel switches are respectively fixed at both ends of the cleaning support. The travel switches are electrically connected to the controller. The cleaning slider can contact the travel switches;

[0019] The cleaning lead screw is driven by a cleaning motor. The cleaning motor is fixed on the cleaning support. The cleaning motor is electrically connected to the controller.

[0020] Preferably, a locking pin is fixed on the distribution plate, and a plurality of positioning holes are provided on the mounting plate. The number of positioning holes is the same as the number of cathodes. When the distribution plate descends, the locking pin can be inserted into one of the positioning holes.

[0021] Preferably, a ratchet wheel is coaxially fixed to the switching incomplete gear. The ratchet wheel is located above the switching incomplete gear. The ratchet wheel can contact the pawl. The pawl is rotatably arranged under the upper limit support. One end of a torsion spring is fixed to the pawl, and the other end of the torsion spring is fixed under the upper limit support. The torsion spring keeps the pawl pressing against the ratchet wheel. The pawl can prevent the ratchet wheel from reversing, thereby preventing the switching incomplete gear from reversing, and thus preventing the switching gear from rotating forward;

[0022] An overrunning clutch is installed inside the switching gear. The output shaft of the overrunning clutch is fixed with a switching lead screw. The switching lead screw does not have self-locking property. When the switching slider rises, it can drive the switching lead screw to rotate forward. The forward rotation of the switching lead screw cannot drive the switching gear to rotate forward through the overrunning clutch. The reverse rotation of the switching gear can drive the switching lead screw to reverse through the overrunning clutch.

[0023] Preferably, a spray pipe is fixed on the top plate of the water tank, and a spray head is fixed under the spray pipe.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: A plurality of cathodes are arranged under the mounting plate. The cathodes are successively rotated to the cleaning mechanism through the indexing mechanism. Through the cooperation of the rotation of the cathode and the lifting of the scraper, the scale on the cathode is cleaned. One set of cleaning mechanism can be used to clean multiple cathodes, improving the space utilization rate. Compared with the collar sleeved on the cathode, the contact area between the scraper of the present invention and the scale on the cathode is small, reducing the scraping amount, and thus reducing the scraping force. It is more labor-saving when cleaning the scale on the cathode. At the same time, the reaction force received by the cathode is smaller, and it is not easy to damage the collar and the cathode. It is more labor-saving during cleaning. During the electrolysis of water, the cleaning mechanism can be rotated to the horizontal direction to avoid the cleaning mechanism being soaked in water for a long time, extending the service life of the cleaning mechanism. Sockets are provided on the cathode. Before rotating the cathode, workers can separate the cable from the cathode through the socket and the cable plug to avoid damage to the cable during the rotation of the cathode. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is an isometric view of the present invention;

[0026] Figure 2 Isometric view of the water tank top plate and internal structure of the present invention;

[0027] Figure 3 For the present invention Figure 2 Partial enlarged view of location A;

[0028] Figure 4 Isometric view of the cleaning mechanism of the present invention;

[0029] Figure 5 Partial cross-sectional view of the cleaning mechanism of the present invention;

[0030] Figure 6 Front view of the water tank top plate and internal structure of the present invention, with the cleaning bracket fixed in the vertical direction;

[0031] Figure 7 Front view of the water tank top plate and internal structure of the present invention, with the cleaning bracket fixed in the horizontal direction;

[0032] Figure 8 Isometric view of the indexing mechanism, rotating mechanism and cleaning mechanism of the present invention;

[0033] Figure 9 Isometric view of the indexing mechanism, rotating mechanism and cleaning mechanism of the present invention from another angle;

[0034] Figure 10 Isometric view of the main structure of the indexing mechanism of the present invention;

[0035] Figure 11 Isometric view of the main structure of the indexing mechanism of the present invention from another angle;

[0036] Figure 12 Isometric view of the indexing mechanism and rotating mechanism of the present invention;

[0037] Figure 13 Partial cross-sectional view of the rotating mechanism of the present invention;

[0038] Figure 14 Isometric view of the indexing mechanism and rotating mechanism of the present invention from another angle;

[0039] Figure 15 Isometric view of the indexing mechanism and rotating mechanism of the present invention from another angle, with the main motor removed;

[0040] Figure 16 For the present invention Figure 15 Partial enlarged view of location B;

[0041] Figure 17 For the present invention Figure 14 Partial enlarged view of location C.

[0042] In the figure: 101, water tank; 102, sewage outlet; 103, overflow port; 104, mounting plate; 105, cathode; 106, anode; 107, manhole; 108, socket; 109, spray head; 200, cleaning mechanism; 201, cleaning bracket; 202, scraper; 203, cleaning lead screw; 204, cleaning slider; 205, locking rod; 206, feed track; 207, support rod; 208, roller; 209, retracting spring for the tool; 210, spring pin; 211, vertical locking seat; 212, horizontal locking seat; 300, indexing mechanism; 301, indexing incomplete gear; 302, telescopic transmission shaft; 303, upper limit bracket; 304, lower limit bracket; 305, driven indexing clutch sprocket; 306, driving indexing clutch sprocket; 307, distribution plate; 308, motor bracket; 309, main motor; 310, switching incomplete gear; 311, switching gear; 312, switching lead screw; 313, switching slider; 314, driven wedge; 315, driving wedge; 316, wedge spring; 317, switching pin; 318, switching spring; 319, A gear; 320, B gear; 321, C gear; 322, positioning hole; 323, locking pin; 324, wedge bracket; 325, external gear ring; 400, rotating mechanism; 401, spline shaft; 402, input gear; 403, output gear ring; 404, driving clutch sprocket ring; 405, driven clutch sprocket ring; 501, push-pull electromagnet; 502, travel switch; 503, cleaning motor; 504, ratchet; 505, ratchet pawl. Detailed implementation mode

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0044] The present invention provides a technical solution: an electrochemical device for water treatment, such as Figure 1 、 2As shown in the figure, it includes a cleaning mechanism 200 and a water tank 101. The cleaning mechanism 200 is installed under the top plate of the water tank 101. An inlet, an outlet, a sewage outlet 102, and an overflow port 103 are provided on the water tank 101. A mounting disk 104 is rotatably provided on the top plate of the water tank 101. A plurality of cathodes 105 are rotatably provided under the mounting disk 104. A plurality of anodes 106 are fixed under the top plate of the water tank 101. The anodes 106 are electrically connected to an electrolysis power source. A manhole 107 is provided on the top plate of the water tank 101. The mounting disk 104 is driven by a indexing mechanism 300. The indexing mechanism 300 is installed on the top plate of the water tank 101. The indexing mechanism 300 can rotate any one of the cathodes 105 to the cleaning mechanism 200.

[0045] As Figure 2 , 3 , as shown in Figure 4, the cleaning mechanism 200 includes a cleaning bracket 201 and a scraper 202. The cleaning bracket 201 is rotatably provided under the top plate of the water tank 101. The cleaning bracket 201 can be fixed in the vertical or horizontal direction. A cleaning lead screw 203 is rotatably provided on the cleaning bracket 201. The cleaning lead screw 203 is threadedly connected to a cleaning slider 204. The cleaning slider 204 is arranged to move up and down on the cleaning bracket 201. A scraper 202 is slidably provided on the cleaning slider 204. Then the scraper 202 is also arranged to move up and down on the cleaning bracket 201.

[0046] A plurality of cathodes 105 are provided under the mounting disk 104. Each cathode 105 is rotated to the cleaning mechanism 200 in sequence by the indexing mechanism 300. Through the cooperation of the rotation of the cathode 105 and the up-and-down movement of the scraper 202, the scale on the cathode 105 is cleaned. Compared with the collar sleeved on the cathode 105, in this embodiment, the contact area between the scraper 202 and the scale on the cathode 105 is small, and it is more labor-saving during cleaning. During electrolysis of water, the cleaning mechanism 200 can be rotated to the horizontal direction to prevent the cleaning mechanism 200 from being soaked in water for a long time, thereby prolonging the service life of the cleaning mechanism 200.

[0047] As Figure 7 shown, a socket 108 is provided on the cathode 105. A cable plug is detachably connected in the socket 108. The cable plug is electrically connected to the electrolysis power source. The cathode 105 can rotate under the drive of a rotation mechanism 400. A socket 108 is provided on the cathode 105. Before rotating the cathode 105, workers can separate the cable from the cathode 105 through the socket 108 and the cable plug, avoiding damage to the cable during the rotation of the cathode 105.

[0048] As Figure 3 , 4As shown in FIGS. 5, the cleaning mechanism 200 further includes a feed track 206. The feed track 206 is fixed to the cleaning bracket 201. The feed track 206 gradually narrows from its middle to its upper and lower ends, that is, the distance from the middle of the feed track 206 to the cathode 105 gradually increases at its upper and lower ends. One end of the scraper 202 is provided with a blade, and the other end is fixed with a support rod 207. A roller 208 is rotatably arranged on the support rod 207. The roller 208 can roll along the feed track 206. A retracting spring 209 is sleeved on the support rod 207. The retracting spring 209 can press the roller 208 against the feed track 206.

[0049] The rotation of the cleaning lead screw 203 can drive the cleaning slider 204 to lift and lower, and then drive the scraper 202 to lift and lower. During the lifting and lowering of the scraper 202, the roller 208 rolls along the feed track 206, causing the support rod 207 to move along with the feed track 206. The retracting spring 209 can press the roller 208 against the feed track 206, and then drive the scraper 202 to extend and retract. When the scraper 202 is at the middle of the feed track 206, the scraper 202 extends so as to be able to contact the cathode 105. When the scraper 202 is at the two ends of the feed track 206, the scraper 202 retracts and moves away from the cathode 105. Through the cooperation of the feed track 206 and the retracting spring 209, the scraper 202 can retract at both ends of the cleaning bracket 201, avoiding collision with the rotating cathode 105 and preventing damage to the cathode 105 and the scraper 202.

[0050] As Figure 6 、 7, as shown in Figures 9, the cleaning mechanism 200 further includes a locking rod 205. One end of the locking rod 205 is rotatably arranged on the cleaning bracket 201. A locking hole is provided at the other end of the locking rod 205. The length of the cleaning bracket 201 is L, and the length of the locking rod 205 is l. The distance from the rotation center of the cleaning bracket 201 and the top plate of the water tank 101 to the rotation center of the cleaning bracket 201 and the locking rod 205 is S. The length of l satisfies the following relationship: S < l < L - S. A vertical locking seat 211 and a horizontal locking seat 212 are fixed under the top plate of the water tank 101. Spring pins 210 are respectively installed on the vertical locking seat 211 and the horizontal locking seat 212. A spring pin is a commonly used positioning and connecting part. Through the built-in spring, the pin inside it is kept protruding, and through the external handle, the pin inside it can be retracted. When the pin of the spring pin 210 is inserted into the locking hole of the locking rod 205, the locking rod 205 can be fixed at the spring pin 210 of the vertical locking seat 211 or the horizontal locking seat 212. When the spring pin 210 is pulled up by the handle, the locking rod 205 can be separated from the spring pin 210, and thus can be separated from the vertical locking seat 211 or the horizontal locking seat 212. When the locking hole of the locking rod 205 is connected to the vertical locking seat 211 through the spring pin 210, the cleaning bracket 201 is fixed in the vertical direction. When the locking hole of the locking rod 205 is connected to the horizontal locking seat 212 through the spring pin 210, the cleaning bracket 201 is fixed in the horizontal direction.

[0051] Before descaling the cathode 105, first close the water inlet and the water outlet, then pull out the cable plug on the socket 108 of the cathode 105, and then empty the water tank 101 through the sewage outlet 102. After the water tank 101 is emptied, the worker enters the water tank 101 through the manhole 107. Subsequently, pull up the handle of the spring pin 210 of the horizontal locking seat 212 to separate the locking rod 205 from the horizontal locking seat 212. Then rotate the cleaning bracket 201 to make the cleaning bracket 201 vertical, and then connect the locking rod 205 to the vertical locking seat 211. Through the cooperation of the locking rod 205, the horizontal locking seat 212, and the vertical locking seat 211, the cleaning bracket 201 can be conveniently fixed in the vertical direction or the horizontal direction.

[0052] As Figure 7 shown, the distance from the overflow port 103 to the top plate of the water tank 101 is h ( Figure 6 the overflow port 103 is shown by a dotted line in

[0053] As Figure 8As shown in the figure, the indexing mechanism 300 includes an external gear ring 325. The external gear ring 325 is coaxially fixed on the mounting plate 104. The external gear ring 325 is meshed with an indexing incomplete gear 301. When the indexing incomplete gear 301 rotates one week, it can drive the external gear ring 325 to rotate once, and then drive the mounting plate 104 to rotate once, thereby rotating a cathode 105 mounted on the mounting plate 104 to the cleaning mechanism 200.

[0054] As Figure 8 , 9 , 10, and 11 show that the indexing incomplete gear 301 is rotatably arranged on the output shaft of the telescopic transmission shaft 302. The telescopic transmission shaft 302 is a commonly used transmission part, and the length of the transmission shaft can change according to the specific working conditions. A lower limit bracket 304 is arranged below the indexing incomplete gear 301, and an upper limit bracket 303 is arranged above the indexing incomplete gear 301. Both the lower limit bracket 304 and the upper limit bracket 303 are fixed on the top plate of the water tank 101. A driven indexing clutch jaw disc 305 is coaxially fixed below the indexing incomplete gear 301, and a driving indexing clutch jaw disc 306 is fixed on the output shaft of the telescopic transmission shaft 302. The driving indexing clutch jaw disc 306 is located below the indexing incomplete gear 301 and above the driven indexing clutch jaw disc 305. The driven indexing clutch jaw disc 305 and the driving indexing clutch jaw disc 306 form a pair of jaw clutches. When the rotational speed difference between the two components to be engaged is within the maximum engagement rotational speed of the jaw clutch, the jaw clutch can complete the engagement by the mutual extrusion of the teeth. In this embodiment, the engagement between the driven indexing clutch jaw disc 305 and the driving indexing clutch jaw disc 306 is completed by the mutual extrusion of the teeth of the driven indexing clutch jaw disc 305 and the driving indexing clutch jaw disc 306. The output shaft of the telescopic transmission shaft 302 is rotatably arranged on the distribution plate 307, and the output shaft of the telescopic transmission shaft 302 is axially fixed to the distribution plate 307. When the distribution plate 307 rises, it can drive the output shaft of the telescopic transmission shaft 302 to contract, and the length of the telescopic transmission shaft 302 shortens. When the output shaft of the telescopic transmission shaft 302 contracts, it drives the driving indexing clutch jaw disc 306 fixed to it to rise. When the driving indexing clutch jaw disc 306 rises, it can engage with the driven indexing clutch jaw disc 305 located above it, that is, when the distribution plate 307 rises, the driving indexing clutch jaw disc 306 and the driven indexing clutch jaw disc 305 can be engaged ( Figure 9When the active indexing clutch sprocket 306 and the driven indexing clutch sprocket 305 are in the engaged state), the lowering of the distribution plate 307 can drive the output shaft of the telescopic transmission shaft 302 to extend, the length of the telescopic transmission shaft 302 elongates, and when the output shaft of the telescopic transmission shaft 302 extends, it drives the active indexing clutch sprocket 306 fixedly connected thereto to lower. When the active indexing clutch sprocket 306 lowers, it can separate from the driven indexing clutch sprocket 305 located above it, that is, the lowering of the distribution plate 307 can separate the active indexing clutch sprocket 306 and the driven indexing clutch sprocket 305.

[0055] The rotation of the telescopic transmission shaft 302 can drive the active indexing clutch sprocket 306 to rotate. After the active indexing clutch sprocket 306 and the driven indexing clutch sprocket 305 are engaged, the rotation of the telescopic transmission shaft 302 can then drive the driven indexing clutch sprocket 305 to rotate, then drive the indexing incomplete gear 301 to rotate, and then drive the external gear ring 325 to rotate, thereby driving the mounting plate 104 to rotate.

[0056] As Figure 12 、 13 、shown in FIG. 14, the input shaft of the telescopic transmission shaft 302 is driven by the main motor 309. The rotating mechanism 400 further includes a spline shaft 401. The main motor 309 can also drive the spline shaft 401. An input gear 402 is slidably arranged on the spline shaft 401. The spline shaft 401 is circumferentially fixedly connected to the input gear 402. When the spline shaft 401 rotates, it can drive the input gear 402 to rotate. The input gear 402 is rotatably arranged in the distribution plate 307. The input gear 402 is meshed with an output gear ring 403. The output gear ring 403 is rotatably arranged in the distribution plate 307. The output gear ring 403 is coaxially fixed with an active clutch sprocket ring 404. A driven clutch sprocket ring 405 is fixed on the cathode 105. The driven clutch sprocket ring 405 is located below the active clutch sprocket ring 404. The active clutch sprocket ring 404 and the driven clutch sprocket ring 405 form a pair of jaw clutches. The lowering of the distribution plate 307 can drive the input gear 402 and the output gear ring 403 to lower. The lowering of the output gear ring 403 can drive the active clutch sprocket ring 404 to lower, and then drive the active clutch sprocket ring 404 and the driven clutch sprocket ring 405 to engage. The raising of the distribution plate 307 can drive the input gear 402 and the output gear ring 403 to raise. The raising of the output gear ring 403 can drive the active clutch sprocket ring 404 to raise, and then drive the active clutch sprocket ring 404 and the driven clutch sprocket ring 405 to separate ( Figure 12 when the active clutch sprocket ring 404 and the driven clutch sprocket ring 405 are in the separated state).

[0057] After the driving clutch sprocket ring 404 and the driven clutch sprocket ring 405 are engaged, the rotation of the spline shaft 401 can drive the input gear 402 to rotate, and then drive the output gear ring 403 to rotate, then drive the driving clutch sprocket ring 404 to rotate, and then drive the driven clutch sprocket ring 405 to rotate, thereby driving the cathode 105 to rotate.

[0058] The main motor 309 can drive the telescopic transmission shaft 302 and the spline shaft 401 to rotate. The spline shaft 401 drives the driving clutch sprocket ring 404 to rotate through the input gear 402 and the output gear ring 403. When the distribution plate 307 rises, the driving indexing clutch sprocket 306 and the driven indexing clutch sprocket 305 are engaged, the driving clutch sprocket ring 404 and the driven clutch sprocket ring 405 are separated, and the telescopic transmission shaft 302 drives the mounting plate 104 to rotate through the driving indexing clutch sprocket 306, the driven indexing clutch sprocket 305, the indexing incomplete gear 301, and the external gear ring 325, so as to rotate a cathode 105 to the cleaning mechanism 200. Subsequently, when the distribution plate 307 descends, the driving indexing clutch sprocket 306 and the driven indexing clutch sprocket 305 are separated, the driving clutch sprocket ring 404 and the driven clutch sprocket ring 405 are engaged, and the driving clutch sprocket ring 404 drives the cathode 105 to rotate through the driven clutch sprocket ring 405. By lifting and lowering the distribution plate 307, the power of the indexing mechanism 300 and the rotating mechanism 400 can be controlled, which is convenient for driving and controlling the mounting plate 104 and the cathode 105. Moreover, multiple cathodes 105 and mounting plates 104 share a set of power systems, improving the space utilization rate.

[0059] As Figure 13 , 14 shown, the indexing incomplete gear 301 is coaxially fixed with a switching incomplete gear 310. The switching incomplete gear 310 is located below the indexing incomplete gear 301. The switching incomplete gear 310 is meshed with a switching gear 311. The switching gear 311 is coaxially installed with a switching lead screw 312. The switching gear 311 is rotatably arranged on the lower limit support 304. The switching lead screw 312 is threadedly connected with a switching slider 313. The switching slider 313 is arranged on the lower limit support 304 for lifting and lowering. After the indexing incomplete gear 301 is disengaged from the external gear ring 325 of the mounting plate 104, the switching incomplete gear 310 and the switching gear 311 enter into engagement. The forward rotation of the switching incomplete gear 310 can drive the switching gear 311 to reverse, and then drive the switching lead screw 312 to reverse, thereby driving the switching slider 313 to descend.

[0060] As Figure 12As shown, a driven wedge block 314 is fixed on the distribution plate 307. The driven wedge block 314 has two inclined surfaces, respectively called the upper inclined surface and the lower inclined surface. The driven wedge block 314 is pressed by a driving wedge block 315. The driving wedge block 315 has two inclined surfaces, respectively called the upper inclined surface and the lower inclined surface. The driving wedge block 315 is slidably arranged on the wedge block bracket 324. The wedge block bracket 324 is fixed on the top plate of the water tank 101. A wedge block spring 316 is arranged between the driving wedge block 315 and the wedge block bracket 324. The wedge block spring 316 can keep the driving wedge block 315 in contact with the driven wedge block 314. When the lower inclined surface of the driving wedge block 315 contacts the upper inclined surface of the driven wedge block 314, the distribution plate 307 remains below. When the upper inclined surface of the driving wedge block 315 contacts the lower inclined surface of the driven wedge block 314, the distribution plate 307 remains above.

[0061] Through the cooperation of the wedge block spring 316, the driving wedge block 315 and the driven wedge block 314, an upward or downward clamping force can be applied to the distribution plate 307. When the upper inclined surface of the driving wedge block 315 contacts the lower inclined surface of the driven wedge block 314, an upward clamping force is applied to the distribution plate 307. When the clamping force is upward, the distribution plate 307 remains above. At this time, the driving indexing clutch sprocket 306 and the driven indexing clutch sprocket 305 are in a pressed and engaged state. When the lower inclined surface of the driving wedge block 315 contacts the upper inclined surface of the driven wedge block 314, a downward clamping force is applied to the distribution plate 307. When the clamping force is downward, the distribution plate 307 remains below. At this time, the driving clutch sprocket ring 404 and the driven clutch sprocket ring 405 are in a pressed and engaged state.

[0062] As Figure 14 shown, a switching pin 317 is arranged on the distribution plate 307 for lifting and lowering. A switching spring 318 is arranged between the switching pin 317 and the distribution plate 307. The switching spring 318 can keep the switching pin 317 in contact with the switching slider 313.

[0063] After the indexing incomplete gear 301 disengages from the external gear ring 325 of the mounting disc 104, the switching incomplete gear 310 and the switching gear 311 engage. The switching incomplete gear 310 rotates forward to drive the switching slider 313 to descend through the switching gear 311 and the switching lead screw 312. The descent of the switching slider 313 can drive the switching pin 317 to descend. During the descent of the switching pin 317, the switching spring 318 is compressed, causing the elastic force on the switching spring 318 to continuously increase. When the elastic force on the switching spring 318 exceeds the clamping force of the wedge spring 316 and the active wedge 315 on the distribution plate 307, the switching slider 313 and the distribution plate 307 quickly descend, thereby driving the separation of the active indexing clutch sprocket 306 and the driven indexing clutch sprocket 305, and the engagement of the active clutch sprocket ring 404 and the driven clutch sprocket ring 405, cutting off the power of the indexing mechanism 300 and connecting the power of the rotating mechanism 400. Whenever the indexing mechanism 300 rotates a cathode 105 to the cleaning mechanism 200, the distribution plate 307 can automatically descend, facilitating the driving and control of the distribution plate 307.

[0064] As Figure 14 、 15 shown, a motor bracket 308 is fixed on the top plate of the water tank 101. The input shaft of the telescopic transmission shaft 302 is rotatably arranged on the motor bracket 308. An A gear 319 is coaxially fixed on the input shaft of the telescopic transmission shaft 302. The A gear 319 is meshed and connected with a B gear 320. The B gear 320 is fixed on the output shaft of the main motor 309. The main motor 309 is fixed on the motor bracket 308 ( Figure 15 the main motor 309 is removed in

[0065] ). A spline shaft 401 is rotatably arranged on the motor bracket 308. A C gear 321 is coaxially fixed on the spline shaft 401. The C gear 321 is meshed and connected with the B gear 320.

[0066] As Figure 5 、 14 shown, a push-pull electromagnet 501 is fixed under the motor bracket 308. The push-pull electromagnet is a commonly used part, and the push-pull action is realized by energizing the coil to drive the iron core. The output shaft of the push-pull electromagnet 501 is fixed on the distribution plate 307. After the push-pull electromagnet 501 is powered on, it can drive the distribution plate 307 to rise. The push-pull electromagnet 501 is electrically connected to the controller. In this embodiment, the controller can adopt an 8-bit single-chip microcomputer. Travel switches 502 are respectively fixed at both ends of the cleaning bracket 201 (shown in Figure 5In the middle), the travel switch 502 is electrically connected to the controller, and the cleaning slider 204 can contact the travel switch 502.

[0067] As Figure 4 shown, the cleaning lead screw 203 is driven by the cleaning motor 503. The cleaning motor 503 is fixed on the cleaning bracket 201, and the cleaning motor 503 is electrically connected to the controller.

[0068] After the scale on one cathode 105 is cleaned, the cleaning slider 204 moves to the upper end or the lower end and can trigger the travel switch 502, causing the controller to control the push-pull electromagnet 501 to be energized, thereby driving the distribution plate 307 to rise, and then driving the active indexing clutch sprocket 306 and the driven indexing clutch sprocket 305 to engage, and the active clutch sprocket ring 404 and the driven clutch sprocket ring 405 to separate, so that the power of the indexing mechanism 300 is turned on and the power of the rotating mechanism 400 is cut off. The controller also needs to control the cleaning motor 503 to stop rotating for a period of time, waiting for the indexing mechanism 300 to rotate the next cathode 105 to the cleaning mechanism 200. Subsequently, the controller controls the cleaning motor 503 to reverse, causing the cleaning slider 204 to move in the reverse direction.

[0069] After each cathode 105 is cleaned of scale, the distribution plate 307 can automatically rise, facilitating the driving and control of the distribution plate 307.

[0070] As Figure 15 、 16 shown, a locking pin 323 is fixed on the distribution plate 307, and a plurality of positioning holes 322 are formed on the mounting plate 104. The number of positioning holes 322 is the same as the number of cathodes 105. When the distribution plate 307 descends, the locking pin 323 can be inserted into one of the positioning holes 322.

[0071] After the indexing mechanism 300 rotates a cathode 105 to the cleaning mechanism 200 and the distribution plate 307 descends, the power of the indexing mechanism 300 is cut off and the power of the rotating mechanism 400 is turned on. The locking pin 323 is inserted into one of the positioning holes 322, thereby preventing the mounting plate 104 from rotating and avoiding the rotation of the mounting plate 104 when cleaning the scale of the cathode 105, improving stability.

[0072] As Figure 13 、 14As shown in FIGS. 17, the switching incomplete gear 310 is coaxially fixed with a ratchet wheel 504. The ratchet wheel 504 is located above the indexing incomplete gear 301. The ratchet wheel 504 can contact with a pawl 505. The pawl 505 is rotatably arranged above and below the upper limit support 303. One end of a torsion spring is fixed on the pawl 505, and the other end of the torsion spring is fixed under the upper limit support 303. The torsion spring keeps the pawl 505 pressing against the ratchet wheel 504. The pawl 505 can prevent the ratchet wheel 504 from reversing, and further prevent the switching incomplete gear 310 from reversing, thereby preventing the switching gear 311 from rotating forward.

[0073] An overrunning clutch is installed inside the switching gear 311. The overrunning clutch is a commonly used part that can automatically connect or disconnect power according to the rotation direction. The output shaft of the overrunning clutch is fixed with a switching lead screw 312. The switching lead screw 312 does not have self-locking property. In this embodiment, a lead screw with a lead angle greater than the friction angle is used to avoid self-locking. When the switching slider 313 rises, it can drive the switching lead screw 312 to rotate forward. The forward rotation of the switching lead screw 312 cannot drive the switching gear 311 to rotate forward through the overrunning clutch. The reverse rotation of the switching gear 311 can drive the switching lead screw 312 to rotate reversely through the overrunning clutch.

[0074] The rising of the distribution plate 307 can drive the switching slider 313 to rise through the switching pin 317 and the switching spring 318, and further drive the switching lead screw 312 to rotate forward, so as to reset the switching slider 313 and the switching lead screw 312. The forward rotation of the switching lead screw 312 cannot drive the switching gear 311 to rotate forward through the overrunning clutch, and the pawl 505 can prevent the ratchet wheel 504 from reversing, and further prevent the switching incomplete gear 310 from reversing, avoiding the switching incomplete gear 310 driving the external gear ring 325 of the mounting plate 104 to rotate through reverse rotation.

[0075] As Figure 3 shown, a spray pipe is fixed on the top plate of the water tank 101, and a spray head 109 is fixed under the spray pipe. The spray head 109 can wash the cathode 105 to improve the cleaning effect.

[0076] Working process: Before descaling the cathode 105, first close the water inlet and outlet, then pull out the cable plug on the socket 108 of the cathode 105, and then empty the water tank 101 through the sewage outlet 102. After the water tank 101 is emptied, the worker enters the water tank 101 from the manhole 107. Subsequently, pull out the spring pin 210 of the horizontal locking seat 212 to separate the locking rod 205 from the horizontal locking seat 212. Then rotate the cleaning bracket 201 to make the cleaning bracket 201 vertical, and then connect the locking rod 205 to the vertical locking seat 211;

[0077] The main motor 309 can drive the telescopic transmission shaft 302 and the spline shaft 401 to rotate. The spline shaft 401 drives the driving clutch sprocket ring 404 to rotate through the input gear 402 and the output gear ring 403. When the distribution plate 307 rises, the driving indexing clutch sprocket 306 and the driven indexing clutch sprocket 305 are engaged, the driving clutch sprocket ring 404 and the driven clutch sprocket ring 405 are separated, and the telescopic transmission shaft 302 drives the mounting plate 104 to rotate through the driving indexing clutch sprocket 306, the driven indexing clutch sprocket 305, the indexing incomplete gear 301, and the external gear ring 325. During the meshing of the external gear ring 325 and the indexing incomplete gear 301, a cathode 105 is rotated to the cleaning mechanism 200;

[0078] After the indexing incomplete gear 301 disengages from the external gear ring 325 of the mounting plate 104, the switching incomplete gear 310 and the switching gear 311 enter into meshing. The positive rotation of the switching incomplete gear 310 drives the switching slider 313 to descend through the switching gear 311 and the switching lead screw 312. The descent of the switching slider 313 can drive the switching pin 317 to compress the switching spring 318, so that the elastic force on the switching spring 318 continuously increases. When the elastic force on the switching spring 318 exceeds the clamping force of the wedge spring 316 on the distribution plate 307, the switching slider 313 and the distribution plate 307 quickly descend, thereby driving the driving indexing clutch sprocket 306 and the driven indexing clutch sprocket 305 to separate, and the driving clutch sprocket ring 404 and the driven clutch sprocket ring 405 to engage, cutting off the power of the indexing mechanism 300 and connecting the power of the rotating mechanism 400, so that the driving clutch sprocket ring 404 drives the cathode 105 to rotate through the driven clutch sprocket ring 405.

[0079] Subsequently, the cleaning motor 503 drives the cleaning lead screw 203 to rotate, thereby driving the cleaning slider 204 to move up and down, and further driving the scraper 202 to move up and down. During the up and down movement of the scraper 202, the roller 208 rolls along the feed track 206, causing the support rod 207 to move along the feed track 206, and further driving the scraper 202 to extend and retract. When the scraper 202 is at the middle of the feed track 206, the scraper 202 extends to contact the cathode 105, and the scale on the cathode 105 is cleaned through the cooperation of the rotation of the cathode 105 and the up and down movement of the scraper 202;

[0080] After the scale cleaning of a cathode 105 is completed, the cleaning slider 204 moves to the upper or lower end and can trigger the travel switch 502, causing the controller to control the push-pull electromagnet 501 to be energized, thereby driving the distribution plate 307 to rise, enabling the power of the indexing mechanism 300 to be connected and the power of the rotating mechanism 400 to be cut off. The controller controls the cleaning motor 503 to stop rotating for a period of time, waiting for the indexing mechanism 300 to rotate the next cathode 105 to the cleaning mechanism 200. Subsequently, the controller controls the cleaning motor 503 to reverse, causing the cleaning slider 204 to move in the reverse direction, thereby driving the scraper 202 to move in the reverse direction to clean the next cathode 105 rotated to the cleaning mechanism 200.

[0081] The rising of the distribution plate 307 can drive the switching slider 313 to rise, thereby driving the switching lead screw 312 to rotate forward, causing the switching slider 313 and the switching lead screw 312 to reset. The forward rotation of the switching lead screw 312 cannot drive the switching gear 311 to rotate forward through the overrunning clutch, and the pawl 505 can prevent the ratchet 504 from rotating in the reverse direction, thereby preventing the incomplete switching gear 310 from rotating in the reverse direction and avoiding the incomplete switching gear 310 driving the external gear ring 325 of the mounting plate 104 to rotate through the reverse rotation.

[0082] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electrochemical device for water treatment, characterized in that: It includes a cleaning mechanism (200) and a water tank (101). The cleaning mechanism (200) is installed under the top plate of the water tank (101). An inlet, an outlet, a sewage outlet (102) and an overflow port (103) are provided on the water tank (101). A mounting disc (104) is rotatably provided on the top plate of the water tank (101). A plurality of cathodes (105) are rotatably provided under the mounting disc (104). A plurality of anodes (106) are fixed under the top plate of the water tank (101). The anodes (106) are electrically connected to an electrolysis power supply. A manhole (107) is provided on the top plate of the water tank (101). The mounting disc (104) is driven by a indexing mechanism (300). The indexing mechanism (300) is installed on the top plate of the water tank (101). The indexing mechanism (300) can rotate any one of the cathodes (105) to the cleaning mechanism (200). The cleaning mechanism (200) includes a cleaning bracket (201) and a scraper (202). The cleaning bracket (201) is rotatably provided under the top plate of the water tank (101). The cleaning bracket (201) can be fixed in the vertical or horizontal direction. A cleaning lead screw (203) is rotatably provided on the cleaning bracket (201). The cleaning lead screw (203) is threadedly connected with a cleaning slider (204). The cleaning slider (204) is arranged to move up and down on the cleaning bracket (201). A scraper (202) is slidably provided on the cleaning slider (204). Then the scraper (202) is also arranged to move up and down on the cleaning bracket (201). A socket (108) is provided on the cathode (105). A cable plug is detachably connected inside the socket (108). The cable plug is electrically connected to the electrolysis power supply. The cathode (105) can rotate under the drive of a rotating mechanism (400). The indexing mechanism (300) includes an external gear ring (325). The external gear ring (325) is coaxially fixed on the mounting disc (104). The external gear ring (325) is meshed with an indexing incomplete gear (301). Rotating the indexing incomplete gear (301) for one week can drive the external gear ring (325) to rotate once, and then drive the mounting disc (104) to rotate once, thereby rotating one of the cathodes (105) installed on the mounting disc (104) to the cleaning mechanism (200). The indexing incomplete gear (301) is rotatably arranged on the output shaft of the telescopic transmission shaft (302). A lower limit bracket (304) is arranged below the indexing incomplete gear (301), and an upper limit bracket (303) is arranged above the indexing incomplete gear (301). Both the lower limit bracket (304) and the upper limit bracket (303) are fixed on the top plate of the water tank (101). A driven indexing clutch sprocket (305) is coaxially fixed below the indexing incomplete gear (301). A driving indexing clutch sprocket (306) is fixed on the output shaft of the telescopic transmission shaft (302). The driving indexing clutch sprocket (306) is located below the indexing incomplete gear (301) and above the driven indexing clutch sprocket (305). The output shaft of the telescopic transmission shaft (302) is rotatably arranged on the distribution plate (307). When the distribution plate (307) rises, the driving indexing clutch sprocket (306) and the driven indexing clutch sprocket (305) can be engaged. When the distribution plate (307) descends, the driving indexing clutch sprocket (306) and the driven indexing clutch sprocket (305) can be separated; The input shaft of the telescopic transmission shaft (302) is driven by the main motor (309). The rotating mechanism (400) further includes a spline shaft (401). The main motor (309) can also drive the spline shaft (401). An input gear (402) is slidably arranged on the spline shaft (401). The spline shaft (401) is circumferentially fixedly connected to the input gear (402). When the spline shaft (401) rotates, it can drive the input gear (402) to rotate. The input gear (402) is rotatably arranged in the distribution plate (307). The input gear (402) is meshed with an output gear ring (403). The output gear ring (403) is rotatably arranged in the distribution plate (307). A driving clutch sprocket ring (404) is coaxially fixed on the output gear ring (403). A driven clutch sprocket ring (405) is fixed on the cathode (105). The driven clutch sprocket ring (405) is located below the driving clutch sprocket ring (404). When the distribution plate (307) descends, the driving clutch sprocket ring (404) and the driven clutch sprocket ring (405) can be engaged. When the distribution plate (307) rises, the driving clutch sprocket ring (404) and the driven clutch sprocket ring (405) can be separated.

2. The electrochemical device for water treatment according to claim 1, characterized in that: The cleaning mechanism (200) further includes a feed track (206). The feed track (206) is fixed on the cleaning bracket (201). The feed track (206) gradually narrows from the middle to the upper and lower ends, that is, the distance from the middle of the feed track (206) to the cathode (105) gradually increases at its upper and lower ends. One end of the scraper (202) is provided with a blade, and the other end is fixed with a support rod (207). A roller (208) is rotatably arranged on the support rod (207). The roller (208) can roll along the feed track (206). A retracting spring (209) is sleeved on the support rod (207). The retracting spring (209) can press the roller (208) tightly on the feed track (206).

3. An electrochemical device for water treatment according to claim 1, characterized in that: The cleaning mechanism (200) further includes a locking lever (205). One end of the locking lever (205) is rotatably arranged on the cleaning bracket (201). A locking hole is provided at the other end of the locking lever (205). The length of the cleaning bracket (201) is L, and the length of the locking lever (205) is l. The distance from the rotation center of the cleaning bracket (201) and the top plate of the water tank (101) to the rotation center of the cleaning bracket (201) and the locking lever (205) is S. The length of l satisfies the following relationship: S < l < L - S. A vertical locking seat (211) and a horizontal locking seat (212) are fixed under the top plate of the water tank (101). Spring pins (210) are respectively installed on the vertical locking seat (211) and the horizontal locking seat (212). When the locking hole of the locking lever (205) is connected to the vertical locking seat (211) through the spring pin (210), the cleaning bracket (201) is fixed in the vertical direction. When the locking hole of the locking lever (205) is connected to the horizontal locking seat (212) through the spring pin (210), the cleaning bracket (201) is fixed in the horizontal direction.

4. An electrochemical device for water treatment according to claim 1, characterized in that: The distance from the overflow port (103) to the top plate of the water tank (101) is h. When the cleaning bracket (201) is fixed in the horizontal direction, the distance from the top plate of the water tank (101) to the cutting edge of the scraper (202) is D, and the value of D is between 0 - h.

5. An electrochemical device for water treatment according to claim 1, characterized in that: The indexing incomplete gear (301) is coaxially fixed with a switching incomplete gear (310). The switching incomplete gear (310) is located below the indexing incomplete gear (301). The switching incomplete gear (310) is meshed with a switching gear (311). The switching gear (311) is coaxially installed with a switching lead screw (312). The switching gear (311) is rotatably arranged on the lower limit bracket (304). The switching lead screw (312) is threadedly connected with a switching slider (313). The switching slider (313) is arranged to move up and down on the lower limit bracket (304). After the indexing incomplete gear (301) disengages from the external gear ring (325) of the mounting disc (104), the switching incomplete gear (310) engages with the switching gear (311). The forward rotation of the switching incomplete gear (310) can drive the switching gear (311) to reverse, thereby driving the switching lead screw (312) to reverse, and then driving the switching slider (313) to descend; A driven wedge block (314) is fixed on the distribution plate (307). The driven wedge block (314) has two inclined surfaces, which are respectively called the upper inclined surface and the lower inclined surface. The driven wedge block (314) is pressed by a driving wedge block (315). The driving wedge block (315) has two inclined surfaces, which are respectively called the upper inclined surface and the lower inclined surface. The driving wedge block (315) is slidably arranged on the wedge block bracket (324). The wedge block bracket (324) is fixed on the top plate of the water tank (101). A wedge block spring (316) is arranged between the driving wedge block (315) and the wedge block bracket (324). The wedge block spring (316) can keep the driving wedge block (315) in contact with the driven wedge block (314). When the lower inclined surface of the driving wedge block (315) contacts the upper inclined surface of the driven wedge block (314), the distribution plate (307) remains below. When the upper inclined surface of the driving wedge block (315) contacts the lower inclined surface of the driven wedge block (314), the distribution plate (307) remains above; A switching pin (317) is arranged on the distribution plate (307) in a lifting manner. A switching spring (318) is arranged between the switching pin (317) and the distribution plate (307). The switching spring (318) can keep the switching pin (317) in contact with the switching slider (313).

6. An electrochemical device for water treatment according to claim 1, characterized in that: A motor bracket (308) is fixed on the top plate of the water tank (101). The input shaft of the telescopic transmission shaft (302) is rotatably arranged on the motor bracket (308). An A gear (319) is coaxially fixed on the input shaft of the telescopic transmission shaft (302). The A gear (319) is meshed and connected with a B gear (320). The B gear (320) is fixed on the output shaft of the main motor (309). The main motor (309) is fixed on the motor bracket (308). A spline shaft (401) is rotatably arranged on the motor bracket (308). A C gear (321) is coaxially fixed on the spline shaft (401). The C gear (321) is meshed and connected with the B gear (320); A push-pull electromagnet (501) is fixed under the motor bracket (308). The output shaft of the push-pull electromagnet (501) is fixed on the distribution plate (307). After the push-pull electromagnet (501) is powered on, it can drive the distribution plate (307) to rise. The push-pull electromagnet (501) is electrically connected to the controller. Travel switches (502) are respectively fixed at both ends of the cleaning bracket (201). The travel switches (502) are electrically connected to the controller. The cleaning slider (204) can contact the travel switches (502); The cleaning lead screw (203) is driven by a cleaning motor (503). The cleaning motor (503) is fixed on the cleaning bracket (201). The cleaning motor (503) is electrically connected to the controller.

7. An electrochemical device for water treatment according to claim 1, characterized in that: A locking pin (323) is fixed on the distribution plate (307). A plurality of positioning holes (322) are formed on the mounting plate (104). The number of the positioning holes (322) is the same as the number of the cathodes (105). When the distribution plate (307) descends, the locking pin (323) can be inserted into a positioning hole (322).

8. An electrochemical device for water treatment according to claim 5, characterized in that: The switching incomplete gear (310) is coaxially fixed with a ratchet wheel (504). The ratchet wheel (504) is located above the switching incomplete gear (310). The ratchet wheel (504) can contact with a pawl (505). The pawl (505) is rotatably arranged under the upper limit support (303). One end of a torsion spring is fixed on the pawl (505), and the other end of the torsion spring is fixed under the upper limit support (303). The torsion spring keeps the pawl (505) pressing against the ratchet wheel (504). The pawl (505) can prevent the ratchet wheel (504) from reversing, and further prevent the switching incomplete gear (310) from reversing, so as to prevent the switching gear (311) from rotating forward. An overrunning clutch is installed in the switching gear (311). The output shaft of the overrunning clutch is fixed with a switching lead screw (312). The switching lead screw (312) does not have self-locking property. When the switching slider (313) rises, it can drive the switching lead screw (312) to rotate forward. The forward rotation of the switching lead screw (312) cannot drive the switching gear (311) to rotate forward through the overrunning clutch. The reverse rotation of the switching gear (311) can drive the switching lead screw (312) to rotate reversely through the overrunning clutch.

9. An electrochemical device for water treatment according to claim 1, characterized in that: A spray pipe is fixed on the top plate of the water tank (101), and a spray head (109) is fixed under the spray pipe.

Images