PH automatic detection control device

Abstract

The utility model discloses an automatic PH detection control device which comprises a controller, a crystallization kettle main body, a first alkali liquor barrel, a second alkali liquor barrel, a liquor outlet pipe, a PH sensor and a driving assembly, the first alkali liquor barrel is connected with the second alkali liquor barrel, the first alkali liquor barrel and the second alkali liquor barrel are both located outside the crystallization kettle main body, and the first alkali liquor barrel and the second alkali liquor barrel are connected with the controller. The second alkali liquor barrel is connected with the liquid outlet pipe, the liquid outlet pipe is located in the crystallization kettle body, a water outlet hole is formed in the liquid outlet pipe, the detection end of the PH sensor is located in the crystallization kettle body, and an electric control valve in control connection with a controller is arranged in the first alkali liquor barrel. The PH sensor is connected with the controller, the PH sensor is suitable for transmitting a signal to the controller so as to control opening and closing of the electric control valve, a plurality of links on an alkali liquor supply path are subjected to cut-off control in a mechanical transmission mode, and the more stable supply stopping effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of pH value control equipment, and particularly to a pH automatic detection and control device. Background Art

[0002] At present, in chemical production, especially in the process of chemical reaction using a crystallization kettle, the precise control of the pH value is crucial for ensuring product quality, improving production efficiency, and ensuring production safety. However, in the prior art, after the pH value reaches the preset threshold, a crystallization kettle pH automatic detection and control device often fails to timely close the caustic soda feed supply, which poses a major challenge in the current technical background.

[0003] After retrieval, it is found that the Chinese utility model patent with the authorization announcement number CN209764774U discloses a device for measuring and controlling the pH value during the reaction process. In this patent, a pH detector is connected to the reaction kettle, the side wall of the feeding tank is transparent and provided with scale lines, and the internal sliding piston is connected to the pressure plate to control the feeding amount and speed. At the same time, an acid liquid pipe, a caustic soda liquid pipe, and a recovery liquid outlet pipe are provided, which improves work efficiency and saves resources. However, when the pH value reaches the threshold, only the electrically controlled piston is opened to cut off the supply of the acid and alkali liquid, which is not stable enough. When a failure occurs and it cannot be closed in time, it will cause an excessive pH value and lead to a change in the overall pH value. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the defects in the prior art, and through mechanical transmission, the cut-off control of multiple links on the caustic soda supply path is realized, achieving a more stable stop supply effect.

[0005] To solve the above technical problem, the technical solution of the utility model is a pH automatic detection and control device, including:

[0006] A controller, a crystallization kettle main body, a first caustic soda cylinder, a second caustic soda cylinder, a liquid outlet pipe, a pH sensor, and a driving component;

[0007] The first caustic soda cylinder is connected to the second caustic soda cylinder, both the first caustic soda cylinder and the second caustic soda cylinder are located outside the crystallization kettle main body, the second caustic soda cylinder is connected to the liquid outlet pipe, the liquid outlet pipe is located inside the crystallization kettle main body, and a water outlet hole is opened on the liquid outlet pipe;

[0008] The detection end of the pH sensor is located inside the crystallization kettle main body;

[0009] An electrically controlled valve controlled by the controller is arranged inside the first caustic soda cylinder, the pH sensor is connected to the controller, and the pH sensor is adapted to transmit a signal to the controller to control the opening and closing of the electrically controlled valve;

[0010] The driving assembly is located outside the main body of the crystallization kettle, and the driving assembly is connected to a controller. The pH sensor is adapted to transmit a signal to the controller to control the operation of the driving assembly;

[0011] A first cutting assembly is arranged inside the second lye cylinder. The driving assembly is connected to the first cutting assembly to drive the operation of the first cutting assembly to open or close a passage. The first cutting assembly includes a fixed disk and a rotating disk. Through grooves penetrating through themselves are formed on both the rotating disk and the fixed disk. The rotating disk is connected to the driving assembly to be driven to rotate by the driving assembly. When the rotating disk rotates to a position where the through grooves on the rotating disk and the fixed disk are communicated, the passage is opened, and when the rotating disk rotates to a position where the through grooves on the rotating disk and the fixed disk are not communicated, the passage is closed.

[0012] Further, the liquid outlet pipe is horizontally arranged in a long strip shape inside the main body of the crystallization kettle.

[0013] Further, a stirring assembly is further included. The stirring assembly includes a first driving device and a stirring rod. The first driving device is located outside the main body of the crystallization kettle, and the stirring rod is located inside the main body of the crystallization kettle;

[0014] The first driving device is connected to the stirring rod to drive the stirring rod to rotate inside the main body of the crystallization kettle;

[0015] A bottom stirring blade is fixedly sleeved on the outer peripheral surface of the stirring rod.

[0016] Further, a spiral stirring blade is fixedly sleeved on the outer peripheral surface of the stirring rod.

[0017] Further, the driving assembly includes a second driving device. The first cutting assembly further includes a rotating shaft and a synchronous belt;

[0018] The rotating shaft is rotatably installed inside the second lye cylinder, and the rotating shaft passes through and is fixedly connected between the fixed disk and the rotating disk;

[0019] A synchronous belt is sleeved on the outer peripheral surfaces of the part of the rotating shaft extending out of the second lye cylinder and the output shaft of the second driving device through a synchronous pulley. A one-way bearing is connected between the rotating shaft and the synchronous pulley thereon.

[0020] Further, a second cutting assembly is further arranged inside the second lye cylinder. The second cutting assembly includes an inner sealing sleeve rotatably installed in the corresponding liquid outlet pipe;

[0021] The rotating disk is connected to the inner sealing sleeve to be driven to rotate to drive the inner sealing sleeve to rotate. The inner sealing sleeve is adapted to block or open the water outlet hole after rotation.

[0022] Furthermore, the second cutting assembly further includes an outer gear sleeve coaxially connected to the rotating disk and an inner gear sleeve coaxially connected to the corresponding inner sealing sleeve;

[0023] The outer gear sleeve is meshed and connected with the inner gear sleeve;

[0024] The outer gear sleeve is adapted to rotate following the rotating disk to drive the inner gear sleeve to rotate and further drive the inner sealing sleeve to rotate.

[0025] Furthermore, it further includes an auxiliary assembly. The auxiliary assembly includes a linkage assembly and a stirring arm. The driving assembly further includes a driving gear. The second driving device is located outside the main body of the crystallization kettle, and the driving gear is located inside the main body of the crystallization kettle. The output shaft of the second driving device is connected to the driving gear to be adapted to drive the driving gear to rotate inside the main body of the crystallization kettle;

[0026] The linkage assembly is adapted to be driven to rotate by the driving gear to drive the stirring arm to rotate around the pH sensor as the axis outside the pH sensor.

[0027] Furthermore, the linkage assembly includes a driven gear, and the driven gear is rotatably installed inside the main body of the crystallization kettle;

[0028] The driven gear is meshed and connected with the driving gear, and the pH sensor is located at the central position of the driven gear.

[0029] Adopting the above technical solutions, the utility model has the following beneficial effects:

[0030] 1. Through the setting of the first cutting assembly, the second cutting assembly and the electric control valve, after the pH value reaches the threshold, the electric control valve in the first alkali solution cylinder is closed in an electric control manner, and then the first cutting assembly and the second cutting assembly in the second alkali solution cylinder and the liquid outlet pipe are driven by the driving assembly to be closed simultaneously and synchronously, realizing the closing control at multiple places and improving the stability of the cutting supply.

[0031] 2. Through the setting of the liquid outlet pipe arranged horizontally in a long strip shape, the alkali solution flows into the main body of the crystallization kettle more dispersedly, reducing the difficulty of stirring and mixing, improving the mixing rate, and avoiding the pH sensor misjudgment caused by too large pH value deviation at some positions after insufficient mixing.

[0032] 3. Through the setting of the spiral stirring blade and the bottom stirring blade, when mixing, the inclined spiral stirring blade can guide the liquid to form a specific flow pattern, forming a vortex or a circulating flow, thereby strengthening the stirring effect. The bottom stirring blade can ensure that the materials at the bottom of the crystallization kettle are fully stirred, avoiding the deposition and caking of the materials at the bottom.

[0033] 4. By setting the stirring arm, the solution around the pH sensor can be further stirred and mixed while the stirring device is in use, avoiding improving the mixing uniformity and preventing misjudgment by the pH sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0035] Figure 2 It is a structural diagram of the interior of the main body of the crystallization kettle of the present utility model;

[0036] Figure 3 It is a schematic diagram of the structure of the stirring assembly of the present utility model;

[0037] Figure 4 It is a schematic diagram of the structure of the auxiliary assembly of the present utility model;

[0038] Figure 5 It is a schematic diagram of the structure of the first cutting assembly of the present utility model Figure 1 ;

[0039] Figure 6 It is a schematic diagram of the structure of the first cutting assembly of the present utility model Figure 2 ;

[0040] Figure 7 It is a schematic diagram of the structure of the second cutting assembly of the present utility model.

[0041] In the figure: 1. Main body of the crystallization kettle;

[0042] 2. Stirring assembly; 21. First driving device; 22. Stirring rod; 23. Spiral stirring blade; 24. Bottom stirring blade;

[0043] 3. pH sensor;

[0044] 4. Driving assembly; 41. Second driving device; 42. Driving gear;

[0045] 5. Auxiliary assembly; 51. Driven gear; 52. Stirring arm;

[0046] 6. First lye cylinder; 7. Second lye cylinder;

[0047] 8. Liquid outlet pipe; 81. Water outlet hole;

[0048] 9. First cutting assembly; 91. Rotating shaft; 92. Fixed disk; 93. Water passing trough; 94. Rotating disk;

[0049] 10. Second cutting assembly; 101. Outer gear sleeve; 102. Inner gear sleeve; 103. Inner closed sleeve;

[0050] 11. Timing belt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0051] In order to make the content of the present utility model easier to be clearly understood, the following further detailed description of the present utility model is given according to specific embodiments in conjunction with the accompanying drawings.

[0052] Embodiment 1

[0053] As Figures 1-3 shown, a PH automatic detection and control device includes:

[0054] a controller, a crystallization kettle main body 1, a first lye cylinder 6, a second lye cylinder 7, a liquid outlet pipe 8, a PH sensor 3, and a driving assembly 4; wherein,

[0055] the first lye cylinder 6 is connected to the second lye cylinder 7, both the first lye cylinder 6 and the second lye cylinder 7 are located outside the crystallization kettle main body 1, the second lye cylinder 7 is connected to the liquid outlet pipe 8, the liquid outlet pipe 8 is located inside the crystallization kettle main body 1, and a water outlet hole 81 is opened on the liquid outlet pipe 8;

[0056] the detection end of the PH sensor 3 is located inside the crystallization kettle main body 1;

[0057] an electric control valve controlled by the controller is arranged inside the first lye cylinder 6, the PH sensor 3 is connected to the controller, and the PH sensor 3 is adapted to transmit a signal to the controller to control the opening and closing of the electric control valve;

[0058] the driving assembly 4 is located outside the crystallization kettle main body 1, the driving assembly 4 is connected to the controller, and the PH sensor 3 is adapted to transmit a signal to the controller to control the action of the driving assembly 4;

[0059] a first cutting assembly 9 is arranged inside the second lye cylinder 7, the driving assembly 4 is connected to the first cutting assembly 9 to be adapted to drive the action of the first cutting assembly 9 to open or close the passage, the first cutting assembly 9 includes a fixed disk 92 and a rotating disk 94, through water grooves 93 penetrating through themselves are opened on both the rotating disk 94 and the fixed disk 92, the rotating disk 94 is connected to the driving assembly 4 to be adapted to be driven by the driving assembly 4 to rotate, and when the rotating disk 94 rotates to the through water grooves 93 on the rotating disk 94 and the fixed disk 92 are communicated, the passage is opened, and when the rotating disk 94 rotates to the through water grooves 93 on the rotating disk 94 and the fixed disk 92 are not communicated, the passage is closed.

[0060] As Figure 2 shown, the liquid outlet pipe 8 is horizontally arranged in a long strip shape inside the crystallization kettle main body 1, and a plurality of water outlet holes 81 are opened on the horizontally arranged liquid outlet pipe 8 in a long strip shape. This setting can shunt the lye entering the liquid outlet pipe 8, and after shunting, it enters the crystallization kettle main body 1 more evenly, facilitating subsequent rapid and uniform mixing.

[0061] As Figures 2-3As shown, the PH automatic detection and control device further includes a stirring assembly 2. The stirring assembly 2 includes a first driving device 21 and a stirring rod 22. The stirring rod 22 is located inside the main body 1 of the crystallization kettle.

[0062] The first driving device 21 is connected to the stirring rod 22 to drive the stirring rod 22 to rotate inside the main body 1 of the crystallization kettle.

[0063] A bottom stirring blade 24 is fixedly sleeved on the outer peripheral surface of the stirring rod 22.

[0064] As Figures 2-3 shown, a spiral stirring blade 23 is fixedly sleeved on the outer peripheral surface of the stirring rod 22.

[0065] As Figure 4 、 5 、6 shown, the driving assembly 4 includes a second driving device 41. The first cutting assembly 9 further includes a rotating shaft 91 and a synchronous belt 11.

[0066] The rotating shaft 91 is rotatably installed inside the second lye cylinder 7. The rotating shaft 91 passes through the fixed disk 92 and is fixedly connected to the rotating disk 94.

[0067] The part of the rotating shaft 91 extending out of the second lye cylinder 7 and the outer peripheral surface of the output shaft of the second driving device 41 are commonly sleeved with a synchronous belt 11 through a synchronous pulley. And a one-way bearing is connected between the rotating shaft 91 and the synchronous pulley thereon.

[0068] In this embodiment, both the driving device 21 and the second driving device 41 can be motors.

[0069] As Figures 5-7 shown, a second cutting assembly 10 is further arranged inside the second lye cylinder 7. The second cutting assembly 10 includes an inner sealing sleeve 103 rotatably installed in the corresponding liquid outlet pipe 8.

[0070] The rotating disk 94 is connected to the inner sealing sleeve 103 to be driven to rotate to drive the inner sealing sleeve 103 to rotate. The inner sealing sleeve 103 is adapted to block or open the water outlet hole 81 after rotation.

[0071] As Figure 7 shown, the second cutting assembly 10 further includes an outer gear sleeve 101 coaxially connected to the rotating disk 94 and an inner gear sleeve 102 coaxially connected to the corresponding inner sealing sleeve 103.

[0072] The outer gear sleeve 101 is meshed and connected with the inner gear sleeve 102.

[0073] The outer gear sleeve 101 is adapted to rotate following the rotating disk 94 to drive the inner gear sleeve 102 to rotate and further drive the inner sealing sleeve 103 to rotate.

[0074] The working principle of this embodiment is as follows:

[0075] The main body 1 of the crystallization kettle is provided with a feed port, a discharge port, and a first lye cylinder 6 for storing lye;

[0076] The materials that need to be mixed and have their pH value controlled are fed into the interior of the main body 1 of the crystallization kettle through the feed port, and the lye is fed into the interior of the crystallization kettle through the first lye cylinder 6. The lye flows from the first lye cylinder 6 into the second lye cylinder 7, and finally flows into the interior of the main body 1 of the crystallization kettle through the liquid outlet pipe 8;

[0077] The materials and the lye are mixed inside the main body 1 of the crystallization kettle by the stirring assembly 2, and the mixed and uniform solution is detected for its pH value by the pH sensor 3. When the pH value reaches the set threshold, the pH sensor 3 sends signals to the electric control valve located in the first lye cylinder 6 and the driving assembly 4;

[0078] After receiving the signals, the electric control valve closes, the driving assembly 4 starts. After starting, the synchronous belt 11 drives the first cutting assembly 9 and the second cutting assembly 10. The electric control valve closes the first lye cylinder 6, the first cutting assembly 9 closes the second lye cylinder 7, and the second cutting assembly 10 closes the liquid outlet pipe 8, realizing the control at three places in the lye supply path to ensure that the supply of lye can be cut off in time. At the same time, the first cutting assembly 9 and the second cutting assembly 10 adopt an additional power source and a mechanical transmission method to achieve the cutting of the supply, and the achieved effect is more stable.

[0079] The stirring assembly 2 controls the spiral stirring blade 23 and the bottom stirring blade 24 to stir and mix the solution inside the main body 1 of the crystallization kettle by driving the stirring rod 22 to rotate through the driving device. The inclined spiral stirring blade 23 can guide the liquid to form a specific flow pattern, forming a vortex or a circulating flow, thereby strengthening the stirring effect. This flow pattern helps the uniform distribution of the materials inside the crystallization kettle and improves the crystallization efficiency. The bottom stirring blade 24 can ensure that the materials at the bottom of the crystallization kettle are fully agitated, avoiding the deposition and caking of the materials at the bottom.

[0080] The first cutting assembly 9 is controlled by the driving assembly 4. When the driving assembly 4 receives the signal sent after the pH sensor 3 reaches the threshold, the driving device 21 is started. The driving device 21 always drives the driving gear 42 to rotate forward when the pH value does not reach the threshold, but changes to reverse when receiving the signal, and the reverse angle can enable the first cutting assembly 9 to complete the entire cutting action;

[0081] When the drive device two 41 drives the output shaft to reverse, the reverse rotation of the rotating shaft 91 can be achieved through the setting of the synchronous belt 11. When the output shaft rotates forward, due to the setting of the one-way bearing, only the synchronous pulley on the rotating shaft 91 can be driven to rotate, and the rotating shaft 91 cannot be driven to rotate. Only when the output shaft rotates in reverse can the synchronous belt 11 drive the rotating shaft 91 and the synchronous pulley thereon to rotate together. When the rotating shaft 91 rotates, it drives the rotating disk 94 to produce an angular offset. After the angular offset of the rotating disk 94, the water outlet groove on the fixed disk 92 will be blocked. The rotating disk 94 and the fixed disk 92 are closely attached to each other to achieve the closing of the fixed disk 92. When the fixed disk 92 needs to be reopened, the drive device two 41 continues to drive the rotating disk 94 to reverse until it returns to its original position;

[0082] When the rotating disk 94 rotates to perform the opening and closing operation on the fixed disk 92, it will synchronously drive the cutting component two 10 to start working. After the rotating disk 94 rotates, it drives the outer gear sleeve 101 to rotate together. The outer gear sleeve 101 rotates and meshes with the inner gear sleeve 102 to realize the rotation of the inner gear sleeve 102. The inner gear sleeve 102 then drives the inner sealing sleeve 103 to rotate. After the inner sealing sleeve 103 rotates, it covers the water outlet hole 81 of the liquid outlet pipe 8, thereby realizing the last step of cutting off the supply control.

[0083] Embodiment two

[0084] As Figure 4 shown. On the basis of Embodiment one, this embodiment further includes the following structure: The PH automatic detection and control device further includes an auxiliary component 5. The auxiliary component 5 includes a linkage component and a stirring arm 52. The drive component 4 further includes a driving gear 42. The drive device two 41 is located outside the crystallization kettle body 1, and the driving gear 42 is located inside the crystallization kettle body 1. The output shaft of the drive device two 41 is connected to the driving gear 42 to be adapted to drive the driving gear 42 to rotate inside the crystallization kettle body 1; The contact part between the output shaft of the drive device two 41 and the crystallization kettle body 1 is connected through a rotary seal; The linkage component is adapted to be driven to rotate by the driving gear 42 to drive the stirring arm 52 to rotate around the PH sensor 3 with the PH sensor 3 as the axis.

[0085] As Figure 4 shown, the linkage component includes a driven gear 51. The driven gear 51 is rotatably installed inside the crystallization kettle body 1;

[0086] The driven gear 51 is meshed and connected with the driving gear 42. The PH sensor 3 is located at the center of the driven gear 51.

[0087] The working principle of this embodiment is as follows:

[0088] In the forward rotation state of the second driving device 41, due to the setting of the one-way bearing, the rotating shaft 91 will not drive the first cutting assembly 9 and the second cutting assembly 10 to start. However, whether the output shaft of the second driving device 41 rotates forward or backward, it will drive the driving gear 42 to rotate. The driving gear 42 meshes with the driven gear 51 to drive the stirring arm 52 to rotate. In the rotating state of the stirring arm 52, with the PH sensor 3 as the axis, it rotates outside the PH sensor 3, so as to further mix and stir the solution around the PH sensor 3 to ensure uniformity, and avoid the problem that the stirring assembly 2 fails to effectively mix all the solution uniformly, resulting in misjudgment of the PH sensor 3.

[0089] In the specific embodiments described above, the technical problems solved, the technical solutions and the beneficial effects of the present invention have been further described in detail. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic pH detection and control device, characterized in that: Comprising: A controller, a crystallization kettle main body (1), a first lye cylinder (6), a second lye cylinder (7), a liquid outlet pipe (8), a pH sensor (3), and a driving assembly (4); The first lye cylinder (6) is connected to the second lye cylinder (7). Both the first lye cylinder (6) and the second lye cylinder (7) are located outside the crystallization kettle main body (1). The second lye cylinder (7) is connected to the liquid outlet pipe (8). The liquid outlet pipe (8) is located inside the crystallization kettle main body (1). Water outlet holes (81) are provided on the liquid outlet pipe (8); The detection end of the pH sensor (3) is located inside the crystallization kettle main body (1); An electrically controlled valve controlled by the controller is arranged inside the first lye cylinder (6). The pH sensor (3) is connected to the controller. The pH sensor (3) is adapted to transmit a signal to the controller to control the opening and closing of the electrically controlled valve; The driving assembly (4) is located outside the crystallization kettle main body (1). The driving assembly (4) is connected to the controller. The pH sensor (3) is adapted to transmit a signal to the controller to control the action of the driving assembly (4); A first cutting assembly (9) is arranged inside the second lye cylinder (7). The driving assembly (4) is connected to the first cutting assembly (9) to be adapted to drive the action of the first cutting assembly (9) to open or close a passage. The first cutting assembly (9) includes a fixed disk (92) and a rotating disk (94). Through water troughs (93) penetrating through themselves are provided on both the rotating disk (94) and the fixed disk (92). The rotating disk (94) is connected to the driving assembly (4) to be adapted to be driven by the driving assembly (4) to rotate. When the through water troughs (93) on the rotating disk (94) and the fixed disk (92) are connected, the passage is opened, and when the through water troughs (93) on the rotating disk (94) and the fixed disk (92) are not connected, the passage is closed.

2. The PH automatic detection and control device according to claim 1, characterized in that, The liquid outlet pipe (8) is horizontally arranged in a long strip shape inside the crystallization kettle main body (1).

3. The PH automatic detection and control device according to claim 1, characterized in that, It further includes a stirring assembly (2). The stirring assembly (2) includes a first driving device (21) and a stirring rod (22). The first driving device (21) is located outside the crystallization kettle main body (1). The stirring rod (22) is located inside the crystallization kettle main body (1); The first driving device (21) is connected to the stirring rod (22) to be adapted to drive the stirring rod (22) to rotate inside the crystallization kettle main body (1); Bottom stirring blades (24) are fixedly sleeved on the outer peripheral surface of the stirring rod (22).

4. The PH automatic detection and control device according to claim 3, characterized in that, Spiral stirring blades (23) are fixedly sleeved on the outer peripheral surface of the stirring rod (22).

5. The PH automatic detection and control device according to claim 1, characterized in that, The driving assembly (4) includes a second driving device (41). The first cutting assembly (9) further includes a rotating shaft (91) and a synchronous belt (11); The rotating shaft (91) is rotatably installed inside the second lye cylinder (7). The rotating shaft (91) passes through the fixed disk (92) and is fixedly connected to the rotating disk (94); The part of the rotating shaft (91) extending out of the second lye cylinder (7) and the outer peripheral surface of the output shaft of the second driving device (41) are jointly sleeved with a synchronous belt (11) through synchronous pulleys, and a one-way bearing is connected between the rotating shaft (91) and the synchronous pulley thereon.

6. The PH automatic detection and control device according to claim 5, characterized in that, A second cutting assembly (10) is further arranged inside the second lye cylinder (7), and the second cutting assembly (10) includes an inner sealing sleeve (103) rotatably installed in the corresponding liquid outlet pipe (8); The rotating disk (94) is connected to the inner sealing sleeve (103) and is adapted to be driven to rotate to drive the inner sealing sleeve (103) to rotate, and the inner sealing sleeve (103) is adapted to block or open the water outlet hole (81) after rotation.

7. The PH automatic detection and control device according to claim 6, characterized in that, The second cutting assembly (10) further includes an outer tooth sleeve (101) coaxially connected to the rotating disk (94) and an inner tooth sleeve (102) coaxially connected to the corresponding inner sealing sleeve (103); The outer tooth sleeve (101) is meshed and connected with the inner tooth sleeve (102); The outer tooth sleeve (101) is adapted to rotate following the rotating disk (94) to drive the inner tooth sleeve (102) to rotate and further drive the inner sealing sleeve (103) to rotate.

8. The PH automatic detection and control device according to claim 5, characterized in that, An auxiliary assembly (5) is further included. The auxiliary assembly (5) includes a linkage assembly and a stirring arm (52). The driving assembly (4) further includes a driving gear (42). The second driving device (41) is located outside the crystallization kettle body (1), and the driving gear (42) is located inside the crystallization kettle body (1). The output shaft of the second driving device (41) is connected to the driving gear (42) and is adapted to drive the driving gear (42) to rotate inside the crystallization kettle body (1); The linkage assembly is adapted to be driven to rotate by the driving gear (42) to drive the stirring arm (52) to rotate around the pH sensor (3) outside the pH sensor (3).

9. The PH automatic detection and control device according to claim 8, characterized in that, The linkage assembly includes a driven gear (51), and the driven gear (51) is rotatably installed inside the crystallization kettle body (1); The driven gear (51) is meshed and connected with the driving gear (42), and the pH sensor (3) is located at the central position of the driven gear (51).

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