Automatic preparation control method and automatic preparation device for pit sealing mud

Abstract

The invention discloses a pit sealing mud automatic preparation control method and an automatic preparation device thereof, and belongs to the technical field of pit sealing mud preparation equipment. A relation model of the characteristic quantity of the viscosity of the cellar sealing mud at the last moment, the water injection rate, the characteristic quantity of the target viscosity of the cellar sealing mud and the stable stirring time of each time of water injection is obtained through an experiment, the stirring time and the water injection rate are controlled according to the model, and accurate measurement of the viscosity characteristics of the cellar sealing mud such as the viscosity of the cellar sealing mud is achieved. The supporting point of the stirring shaft in the preparation device is arranged outside the stirring box, so that the roller bearing is far away from the stirring box, lubricating oil cannot enter the stirring box, the pit sealing mud in the stirring box is prevented from being polluted by the lubricating oil, and the pit sealing mud preparation quality is improved. And the quality of the cellar sealing mud and the cellar sealing effect are ensured.

Description

Technical Field

[0001] This invention belongs to the technical field of sealing mud preparation equipment, and relates to an automatic preparation and control method for sealing mud, as well as an automatic preparation device for sealing mud. Background Technology

[0002] Maotai-flavor baijiu is fermented in purplish-red clay stone cellars, using sorghum, wheat, and water as raw materials. Through a vast microbial system within the yeast starter, fermented mash, and cellar mud, a complex metabolic exchange of matter and energy occurs at the solid-liquid-gas three-phase interface. Cellar mud is the clayey soil used to seal the cellar and form the cellar bottom; it is the sealing material for the anaerobic fermentation surface of the mash within the cellar. The mud used for sealing the cellar must be local purplish-red clayey soil with low humus content, low sand content, no impurities, no pollution, and no stones. The purplish-red clay from within a few kilometers of Maotai Town is considered superior. During the initial fermentation and preparation of the base mash, approximately 50% new mud and 50% old mud are mixed and used to form the cellar bottom mud and sealing mud. Production practice shows that the sealing mud not only seals the cellar but also has a close relationship with the quality of the upper layer of mash. Improper management often results in a strong muddy and musty taste in the base mash, which is one of the main factors affecting the quality of the base liquor.

[0003] Currently, the preparation of sealing mud mainly relies on manual labor, which is labor-intensive, involves harsh working environments, and results in low efficiency. Furthermore, online detection of the mud's viscosity is difficult, leading to challenges in accurately controlling its quality. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an automatic preparation and control method and an automatic preparation device for sealing mud, so as to solve the technical problems of difficulty in online detection of mud viscosity and high labor intensity and low efficiency in the preparation of mud in the prior art.

[0005] The technical solution adopted in this invention is as follows:

[0006] An automated method for preparing and controlling sealing mud, the method comprising the following steps:

[0007] (1) Establish a digital mapping relationship between motor torque and sealing mud viscosity characteristics, and use the obtained motor torque to measure the sealing mud viscosity.

[0008] (2) During the mixing of the sealing mud, the “intermittent water injection + continuous mixing” mode is adopted. After a large number of open-loop mixing experiments, data analysis is conducted to establish a relationship model between the characteristic quantity of the sealing mud viscosity at the previous moment, the water injection volume, the characteristic quantity of the target viscosity of the sealing mud, and the time of stabilization of each water injection and mixing to achieve rapid mixing.

[0009] (3) Verify the relationship model by comparing the measured values ​​obtained by the viscometer. After the verification is qualified, proceed to step (4).

[0010] (4) The stirring shaft is driven by the drive motor to rotate at a constant speed, and the shear stress is measured by the principle of measuring the shear stress by the fixed shear rate of the stirring blade; at the same time, water injection is carried out according to the initial state of the sealing mud raw material with the maximum water content, that is, water injection is carried out with the minimum water content, and the amount of sealing mud processed each time is consistent, that is, the weight of raw material put into the stirrer is consistent each time.

[0011] (5) Based on the relationship model established in step (3) of the previous moment of sealing mud viscosity characteristics, water injection volume, target viscosity characteristics of sealing mud and the time of stabilization of each water injection and stirring, control the water injection volume in the sealing mud stirring process and design the shortest stirring time after water injection.

[0012] (6) The relationship model sets up different production and processing modes for different seasons to prepare sealing mud with different amounts and viscosity.

[0013] Motor torque is measured using a torque sensor or obtained from motor power. The relationship between motor power, speed, and motor torque is well known. Based on this relationship, the required torque magnitude can be obtained. Using a torque sensor, real-time online measurement can be achieved.

[0014] Furthermore, the numerical mapping relationship in step (1) above is as follows:

[0015] v = at 2 +bt+c

[0016] Where v represents viscosity, t represents the real-time torque value, and a, b, and c represent the mapping coefficients of the quadratic, linear, and constant terms, respectively.

[0017] Furthermore, the relational model in step (2) above is as follows:

[0018] s = m(Vv) 2 +n|(Vv)|+p

[0019] u=d(Vv) 2 +e|(Vv)|+f

[0020] Where s is the stirring time, u is the water injection volume, V is the target value of the mud viscosity, v is the viscosity, and m and d, n and e, and p and f are the coefficients of the quadratic, linear, and constant terms, respectively.

[0021] An automatic preparation device for sealing mud includes a mixing box, a mixing shaft, mixing blades, and a torque sensor. The torque sensor is a dynamic disc torque sensor. The mixing box is fixedly connected to the frame. There are two mixing shafts, with the left end rotatably connected to the support frame and the right end horizontally extending into the mixing box from the left side of the mixing box in an elastic seal. The mixing blades are installed on the mixing shaft. The left end of the mixing shaft is connected to the power drive device. The torque sensor is installed on the left end of the mixing shaft to detect the torque of the mixing shaft. The support frame, the power drive device, and the torque sensor are all installed on the frame.

[0022] Furthermore, the aforementioned stirring blades include a stirring blade plate arranged in a spiral pattern fixedly connected to the front half of the stirring shaft and a spiral stirring blade in the rear half. A discharge hopper is provided on the rear side of the spiral stirring blade in the rear half, and a sealed valve plate is installed in front of the discharge hopper. A cylinder is connected to the upper end of the valve plate, and the cylinder is fixedly connected to the rear outside of the mixing box.

[0023] Furthermore, the aforementioned support frame includes a front panel, a rear panel, and a U-shaped base frame. The front panel and the rear panel are respectively fixedly connected to the front and rear sides of the U-shaped base frame. Multiple reinforcing strips are welded between the front panel and the rear panel. The support frame has two rotating parts that connect to the stirring shaft installed side by side. Both rotating parts are fixedly connected to the front panel and the rear panel.

[0024] Furthermore, the aforementioned rotating part includes a rotating sleeve and a front bearing and a rear bearing respectively arranged in the front and rear ends of the rotating sleeve. The rear bearings are a pair, and a cap is installed on the outside of the rear bearing. The front end of the cap is provided with a step that is embedded in the inner end of the rotating sleeve. The cap is fitted onto the sealing cover. The boss at the front end of the sealing cover is embedded in the inner hole on the rear side of the cap. The sealing cover is fixedly connected to the mixing tank, and a through hole is provided at the center of the connection. A sealing ring is provided between the sealing cover and the mixing shaft. A box-type oil seal is installed on the rear side of the sealing ring. The rear side of the box-type oil seal abuts against the gasket ring, and the gasket ring is filled with a filling sealing material ring. A pressure ring is pressed onto the rear side of the filling sealing material ring. The front end of the pressure ring is provided with a step that abuts against the filling sealing material ring. The pressure ring is fixedly connected to the sealing cover. A sealing gasket is provided between the pressure ring and the sealing cover.

[0025] Furthermore, the aforementioned power drive device includes a drive motor, a gearbox, and a synchronous belt drive mechanism. The motor shaft of the drive motor is fixedly connected to the input shaft of the gearbox, and the output shaft of the gearbox is connected to two stirring shafts through the synchronous belt drive mechanism. Both the drive motor and the gearbox are fixedly connected to the frame through the power frame.

[0026] Furthermore, the aforementioned synchronous belt drive mechanism includes a driving synchronous pulley, two driven synchronous pulleys, an auxiliary pulley, and a synchronous belt. The driving synchronous pulley is fixedly connected to the output drive shaft of the transmission and located below the two driven synchronous pulleys. The two driven synchronous pulleys are fixedly connected to the ends of the two stirring shafts. The auxiliary pulley is located above the two driven synchronous pulleys and rotatably connected to the support frame. The synchronous belt is wound around the driving synchronous pulley, the two driven synchronous pulleys, and the auxiliary pulley, and drives the two driven synchronous pulleys to rotate relative to each other.

[0027] The beneficial effects of the present invention are as follows: Compared with the prior art, the present invention has the following advantages:

[0028] 1) This invention constructs a digital mapping relationship between motor torque and viscosity, and obtains a relationship model based on viscosity, stirring time, and water injection volume through numerous experiments. After the obtained relationship model is verified to be qualified, viscosity and motor rotation are controlled to achieve precise measurement of the viscosity and other sticky characteristics of the sealing mud, thereby achieving precise control of the sealing mud preparation and improving the quality control of the sealing mud preparation. Moreover, by obtaining the sealing mud viscosity through online detection, the water addition speed can be increased, and the shortest stirring time can be used to accelerate the preparation speed.

[0029] 2) By placing the rotation support point of the stirring shaft outside the stirring chamber, the roller bearing is moved away from the mixing chamber, thus preventing lubricating oil from entering the mixing chamber and avoiding contamination of the sealing mud inside the mixing chamber by lubricating oil, thereby ensuring the quality of the sealing mud and the sealing effect.

[0030] 3) The dual-shaft mixing blades rotate relative to each other. The front half of the mixing blades and the rear half of the spiral mixing blades are set. The front side mainly plays the role of mixing, while the rear spiral mixing blades play the role of mixing and pushing out. Open the valve plate to push out the mixed sealing mud.

[0031] 4) The support frame consisting of the front and rear panels, U-shaped base frame and reinforcing strips supports the cantilever rotation of the stirring shaft. It has good overall rigidity and high strength, which can improve the support stability. The frame structure is lightweight, low cost and easy to install. The detachable rotating part is rotatably connected, which facilitates the assembly, disassembly and maintenance of the rotating part and the adjustment of its position.

[0032] 5) The use of front and rear bearing supports can extend the support length of the support points, thereby ensuring the stability and reliability of the support. The use of nested caps and pressure caps for positioning not only forms a stable support structure with the support frame and the mixing tank as a whole, but also ensures greater stability of the mixing shaft during mixing and avoids excessive stress on one side due to the misalignment of the mixing shaft at the seal, which would reduce the sealing performance. On the other hand, it can achieve rapid positioning and improve installation efficiency. The use of four layers of seals greatly improves the sealing effect and makes it difficult for bearing lubricating oil to enter the mixing tank.

[0033] 6) The synchronous belt drive mechanism can easily transmit power synchronously to the two stirring shafts. Moreover, the belt drive can isolate the vibration of the gearbox and motor, prevent the vibration from being transmitted to the stirring shaft, and avoid loosening of the stirring blades on the cantilevered stirring shaft, thus improving the service life. Attached Figure Description

[0034] Figure 1 A three-dimensional structural diagram showing the automatic preparation device for sealing mud with the lid open;

[0035] Figure 2 A three-dimensional structural diagram of an automatic sealing mud preparation device;

[0036] Figure 3 A three-dimensional structural diagram of an automatic sealing mud preparation device from another perspective;

[0037] Figure 4 A rear view schematic diagram of the automatic preparation device for sealing mud.

[0038] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure of the middle AA section;

[0039] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure of the middle BB section;

[0040] Figure 7 for Figure 5 Schematic diagram of the cross-sectional structure of the middle CC section;

[0041] Figure 8 for Figure 5 Schematic diagram of the cross-sectional structure of the middle DD;

[0042] Figure 9 This is a schematic diagram of the three-dimensional structure of the support frame;

[0043] Figure 10 This is a three-dimensional structural diagram of the support frame from another perspective.

[0044] Figure 11 This is a schematic diagram of the front view of the support frame structure;

[0045] Figure 12 for Figure 11 Schematic diagram of the cross-sectional structure of the EE. Detailed Implementation

[0046] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0047] Example 1: As Figure 1-12 As shown, an automatic control method for preparing sealing mud is used in an automatic sealing mud preparation device. The method includes the following steps:

[0048] (1) Establish a digital mapping relationship between the characteristics of motor torque and sealing mud viscosity, and use the obtained motor torque to measure the sealing mud viscosity;

[0049] The numerical mapping relationship is as follows:

[0050] v = at 2 +bt+c

[0051] Where v represents viscosity, t represents real-time torque value, and a, b, and c represent the mapping coefficients of quadratic, linear, and constant terms, respectively;

[0052] (2) During the mixing of the sealing mud, the “intermittent water injection + continuous mixing” mode is adopted, that is, the mixing is always carried out, the water injection volume is determined according to the real-time state of the mud, and the mud state value is determined after a period of time (e.g., 20s) after each water injection; after a large number of open-loop mixing experiments, data analysis is carried out to establish a relationship model between the characteristic quantity of the sealing mud viscosity at the previous moment, the water injection volume, the characteristic quantity of the target viscosity of the sealing mud, and the time of stabilization of each water injection and mixing to achieve rapid mixing;

[0053] The relational model is as follows:

[0054] s = m(Vv) 2 +n|(Vv)|+p

[0055] u=d(Vv) 2 +e|(Vv)|+f

[0056] Where s is the stirring time, u is the water injection volume, V is the target value of the mud viscosity, v is the viscosity, and m and d, n and e, and p and f are the coefficients of the quadratic term, the linear term, and the constant term, respectively.

[0057] (3) Verify the relationship model by comparing the measured values ​​obtained by the viscometer. After the verification is qualified, proceed to step (4).

[0058] (4) The stirring shaft is driven by the drive motor to rotate at a constant speed, and the shear stress is measured by the fixed shear rate of the stirring blades. At the same time, water injection is carried out at the initial state where the moisture content of the raw material of the sealing mud is at its maximum value, that is, water is injected with the minimum amount of water to avoid the viscosity of the mud being too low, thereby accelerating the preparation rate. In addition, the amount of sealing mud processed each time is consistent, that is, the weight of the raw material put into the stirrer is consistent each time. This allows for quantitative preparation and also facilitates the accurate measurement of characteristics such as the viscosity of the sealing mud.

[0059] (5) Based on the relationship model established in step (3) of the characteristic quantity of the sealing mud viscosity at the previous moment, the water injection amount, the characteristic quantity of the sealing mud target viscosity, and the time for each water injection and stirring to stabilize, the water injection amount is controlled in the sealing mud stirring process, and the shortest stirring time after water injection is designed.

[0060] (6) The relationship model sets up different production and processing modes for different seasons to prepare different amounts of sealing mud. The reason is that, considering the actual production needs, different amounts of sealing mud are prepared to meet the needs of sealing mud in different seasons. This can be achieved by setting different production and processing modes for different seasons in the controller program, that is, production modes with different raw materials and different viscosities of sealing mud. This requires a lot of experiments to determine. Finally, a curing program that meets the needs of the four seasons of "spring, summer, autumn and winter" and five program modes of "manual and autonomous setting" were developed, that is, flexible production modes of sealing mud with different viscosities corresponding to different preparation amounts.

[0061] Motor torque is measured using a torque sensor or obtained from motor power. The relationship between motor power, speed, and motor torque is well known. Based on this relationship, the required torque magnitude can be obtained. Using a torque sensor, real-time online measurement can be achieved.

[0062] Example 2: As Figure 1-12 As shown, an automatic sealing mud preparation device includes a mixing tank 1, a mixing shaft 2, mixing blades 3, and a torque sensor 6. The mixing tank 1 is fixedly connected to a frame 4. Two mixing shafts 2 are used; the left end is rotatably connected to a support frame 5, and the right end extends horizontally from the left side of the mixing tank 1 into the mixing tank 1 through an elastic seal. The mixing blades 3 are mounted on the mixing shafts 2. The left end of the mixing shafts 2 is connected to a power drive device. A torque sensor 14 is installed on the left end of the mixing shafts 2 to detect the torque of the mixing shafts 2. The torque sensor 6 is a dynamic disc-type torque sensor. The support frame 5, the power drive device, and the torque sensor 6 are all mounted on the frame 4. By placing the rotation support point of the mixing shaft outside the mixing tank, and thus keeping the roller bearing away from the mixing tank, lubricating oil is prevented from entering the mixing tank, avoiding contamination of the sealing mud by lubricating oil, ensuring the quality and sealing effect of the sealing mud. The torque sensor is used to detect the viscosity of the sealing mud in real time, thereby controlling the amount of water added.

[0063] Furthermore, the aforementioned stirring blades 3 include a stirring blade 301 arranged in a spiral pattern fixedly connected to the front half of the stirring shaft 2 and a spiral stirring blade 302 in the rear half. A discharge hopper 303 is provided on the rear side of the spiral stirring blade 302, and a sealed valve plate 304 is installed in front of the discharge hopper. A cylinder 305 is connected to the upper end of the valve plate 304. The cylinder 305 is fixedly connected to the rear outside of the mixing box 1. The dual-shaft stirring blades rotate relative to each other to stir. The front half stirring blade and the rear half spiral stirring blade mainly play a stirring role, while the rear spiral stirring blade plays a stirring and pushing role. By opening the valve plate, the stirred sealing mud can be pushed out.

[0064] Furthermore, the aforementioned support frame 5 includes a front panel 501, a rear panel 502, and a U-shaped base frame 503. The front panel 501 and the rear panel 502 are respectively fixedly connected to the front and rear sides of the U-shaped base frame 503. Multiple reinforcing strips 504 are welded between the front panel 501 and the rear panel 502. Two rotating parts 505 connecting the stirring shaft 2 are installed side by side on the support frame 5. Both rotating parts 505 are fixedly connected to the front panel 501 and the rear panel 502. The rotating part 505 includes a rotating sleeve 506 and a front bearing 507 and a rear bearing 508 respectively arranged in the front and rear ends of the rotating sleeve. A pair of rear bearings 508 are used. A cap 509 is installed on the outside of the rear bearings 508. The front end of the cap 509 is provided with a step that is embedded in the inner end of the rotating sleeve 506. The cap 509 is attached to the sealing cover 510. The boss at the front end of the sealing cover 510 is embedded in the inner hole on the rear side of the cap 509. The sealing cover 510 is fixed. A sealing ring 511 is provided between the sealing ring cover 510 and the stirring shaft 2, connected to the mixing tank 1 with a through hole at the center of the connection. A box-type oil seal ring 512 is installed on the rear side of the sealing ring 511. The rear side of the box-type oil seal ring 512 abuts against the gasket ring 513, and the gasket ring is filled with a filling sealing material ring 514. A pressure ring 515 is pressed onto the rear side of the filling sealing material ring 514. A step is provided at the front end of the pressure ring 515 to abut against the filling sealing material ring 514. The pressure ring 515 is fixedly connected to the sealing ring cover 510. A sealing gasket 516 is provided between the pressure ring 515 and the sealing ring cover 510. The support frame consisting of the front and rear panels, the U-shaped base frame, and the reinforcing strips supports the cantilever rotation of the stirring shaft. It has good overall rigidity and high strength, which can improve the support stability. The frame structure is lightweight, low cost, and easy to install. It is rotatably connected by a detachable rotating part, which facilitates the assembly, disassembly, maintenance, and position adjustment of the rotating part. The use of front and rear bearing supports extends the support length of the support points, thereby ensuring the stability and reliability of the support. The use of nested caps and pressure caps for positioning not only forms a stable support structure with the support frame and the mixing tank as a whole, but also ensures greater stability of the mixing shaft during mixing and avoids excessive stress on one side due to the misalignment of the mixing shaft at the seal, which would reduce the sealing performance. On the other hand, it enables rapid positioning and improves installation efficiency. The use of four layers of seals greatly improves the sealing effect, making it difficult for bearing lubricating oil to enter the mixing tank.

[0065] Furthermore, the aforementioned power drive device includes a drive motor 7, a gearbox 8, and a synchronous belt drive mechanism. The motor shaft of the drive motor 7 is fixedly connected to the input shaft of the gearbox 8, and the output shaft of the gearbox 8 is connected to two stirring shafts 2 via the synchronous belt drive mechanism. Both the drive motor 7 and the gearbox 8 are fixedly connected to the frame 4 via a power frame 9. Under the drive of the synchronous belt drive mechanism, the two stirring shafts 2 rotate inward relative to each other. The synchronous belt drive mechanism includes a driving synchronous pulley 10, two driven synchronous pulleys 11, an auxiliary pulley 12, and a synchronous belt 13. The driving synchronous pulley 10 is fixedly connected to the output drive shaft of the gearbox 8 and is located at the two... Below the driven synchronous pulley 11, two driven synchronous pulleys 11 are fixedly connected to the ends of the two stirring shafts 2. The auxiliary pulley 12 is located above the two driven synchronous pulleys 11 and is rotatably connected to the support frame 5. The synchronous belt 13 is wound around the driving synchronous pulley 10, the two driven synchronous pulleys 11 and the auxiliary pulley 12 and drives the two driven synchronous pulleys 11 to rotate relative to each other. The synchronous belt drive mechanism can easily transmit power synchronously to the two stirring shafts. Moreover, the belt drive can isolate the vibration of the gearbox and the motor, avoid the vibration from being transmitted to the stirring shaft, and prevent the stirring blades on the cantilevered stirring shaft from loosening, thus improving the service life.

[0066] Furthermore, the aforementioned torque sensor 6 is connected to a controller, which is connected to the drive motor 7 of the power drive unit and the solenoid valve of the water spray pipe installed at the top of the mixing tank. After the torque sensor detects and provides feedback on the viscosity, it automatically controls the stirring action and water addition action of the drive motor, thereby improving the precise control of the viscosity.

[0067] Example 3: An operation method of an automatic sealing mud preparation device, wherein the method is as follows: new and old sealing mud that have been crushed to the standard by hammer mill are mixed and quantitatively fed into a mixing tank via a conveyor belt. At the same time, water sprayed from a water spray pipe installed above the mixing tank is atomized and quantitatively fed into the agitator. After soaking and fermenting in the agitator for a certain period of time, the mixing shaft in the mixing tank starts to work. After the sealing mud and water are mixed in the agitator for a certain period of time, the viscosity of the sealing mud is reflected by a torque sensor. When the real-time feedback viscosity is within the set range, no water needs to be added. When it is less than the set range, water is added. After multiple mixing and multiple tests, the viscosity value reaches the set stable standard to form a standard sealing mud. When the sealing mud is no longer needed, it is stored in the mixing tank.

[0068] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of protection of the claims.

Claims

1. An automatic preparation and control method for sealing mud, characterized in that: The method includes the following steps: (1) Establish a digital mapping relationship between the characteristics of motor torque and sealing mud viscosity, and use the obtained motor torque to measure the sealing mud viscosity; (2) During the mixing of the sealing mud, the "intermittent water injection + continuous mixing" mode is adopted. After a large number of open-loop mixing experiments, data analysis is conducted to establish a relationship model between the characteristic quantity of the sealing mud viscosity at the previous moment, the water injection volume, the characteristic quantity of the sealing mud target viscosity, and the stable time of each water injection and mixing to achieve rapid mixing. (3) Verify the relationship model by comparing the measured values ​​obtained by the viscometer. After the verification is qualified, proceed to step (4). (4) The stirring shaft is driven by the drive motor to rotate at a constant speed, and the shear stress is measured by the principle of measuring the shear stress by the fixed shear rate of the stirring blade; at the same time, water injection is carried out according to the initial state of the sealing mud raw material with the maximum water content, that is, water injection is carried out with the minimum water content, and the amount of sealing mud processed each time is consistent, that is, the weight of raw material put into the stirrer is consistent each time. (5) Based on the relationship model established in step (3) of the characteristic quantity of the sealing mud viscosity at the previous moment, the water injection amount, the characteristic quantity of the sealing mud target viscosity, and the time for each water injection and stirring to stabilize, the water injection amount is controlled in the sealing mud stirring process, and the shortest stirring time after water injection is designed. (6) The relationship model sets up different production and processing modes for different seasons to prepare sealing mud with different amounts and viscosity.

2. The automatic preparation and control method for sealing mud as described in claim 1, characterized in that: Motor torque is obtained by measuring it using a torque sensor or by measuring the motor power.

3. The automatic preparation and control method for sealing mud as described in claim 1, characterized in that: The numerical mapping relationship in step (1) is as follows: v=at 2 +bt+c Where v represents viscosity, t represents the real-time torque value, and a, b, and c represent the mapping coefficients of the quadratic, linear, and constant terms, respectively.

4. The automatic preparation and control method for sealing mud as described in claim 1, characterized in that: The relational model in step (2) is as follows: s=m(Vv) 2 +n|(Vv)|+p u=d(V-v) 2 +e|(V-v)|+f in, s represents the mixing time, u represents the water injection volume, V represents the target value of the pit mud viscosity, v represents the viscosity, and m and d, n and e, and p and f represent the coefficients of the quadratic, linear, and constant terms, respectively.

5. An automatic sealing mud preparation device using the method described in any one of claims 1-4, characterized in that: The system includes a mixing tank (1), a mixing shaft (2), mixing blades (3), and a torque sensor (6). The mixing tank (1) is fixedly connected to the frame (4). The mixing shaft (2) consists of two shafts, with the left end rotatably connected to the support frame (5) and the right end extending horizontally from the left side of the mixing tank (1) into the mixing tank (1) via an elastic seal. The mixing blades (3) are mounted on the mixing shaft (2). The left end of the mixing shaft (2) is connected to the power drive device. The torque sensor (6) is mounted on the left end of the mixing shaft (2) to detect the torque of the mixing shaft (2). The support frame (5) and the power drive device are both mounted on the frame (4).

6. The automatic preparation device for sealing mud according to claim 5, characterized in that: The stirring blade (3) includes a stirring blade (301) arranged in a spiral pattern and fixedly connected to the front half of the stirring shaft (2) and a spiral stirring blade (302) in the rear half. A discharge hopper (303) is provided on the rear side of the spiral stirring blade (302). A sealed valve plate (304) is installed in front of the discharge hopper. A cylinder (305) is connected to the upper end of the valve plate (304). The cylinder (305) is fixedly connected to the rear side of the mixing box (1).

7. The automatic preparation device for sealing mud according to claim 6, characterized in that: The support frame (5) includes a front panel (501), a rear panel (502) and a U-shaped base frame (503). The front panel (501) and the rear panel (502) are fixedly connected to the front and rear sides of the U-shaped base frame (503) respectively. Multiple reinforcing strips (504) are welded between the front panel (501) and the rear panel (502). The support frame (5) has two rotating parts (505) connected to the stirring shaft (2) installed side by side. Both rotating parts (505) are fixedly connected to the front panel (501) and the rear panel (502).

8. The automatic preparation device for sealing mud according to claim 5, characterized in that: The rotating part (505) includes a rotating sleeve (506) and a front bearing (507) and a rear bearing (508) respectively arranged in the front and rear ends of the rotating sleeve. A pair of rear bearings (508) are used, and a cap (509) is installed on the outside of each rear bearing (508). The front end of the cap (509) is provided with a step that embeds into the inner end of the rotating sleeve (506). The cap (509) fits against the sealing gland (510). The boss at the front end of the sealing gland (510) is embedded in the inner hole on the rear side of the cap (509). The sealing gland (510) is fixedly connected to the mixing tank (1), and a through hole is provided at the center of this connection point for sealing. A sealing ring (511) is provided between the sealing ring cover (510) and the stirring shaft (2). A box-type oil seal ring (512) is installed on the rear side of the sealing ring (511). The rear side of the box-type oil seal ring (512) abuts against the gasket ring (513). The gasket ring is filled with a filling sealing material ring (514). A pressure ring (515) is pressed on the rear side of the filling sealing material ring (514). A step is provided at the front end of the pressure ring (515) to abut against the filling sealing material ring (514). The pressure ring (515) is fixedly connected to the sealing ring cover (510). A sealing gasket (516) is provided between the pressure ring (515) and the sealing ring cover (510).

9. The automatic preparation device for sealing mud according to claim 5, characterized in that: The power drive unit includes a drive motor (7), a gearbox (8) and a synchronous belt drive mechanism. The motor shaft of the drive motor (7) is fixedly connected to the input shaft of the gearbox (8). The output shaft of the gearbox (8) is connected to two stirring shafts (2) through the synchronous belt drive mechanism. The drive motor (7) and the gearbox (8) are both fixedly connected to the frame (4) through the power frame (9).

10. An automatic preparation device for sealing mud according to claim 9, characterized in that: The synchronous belt drive mechanism includes a driving synchronous pulley (10), two driven synchronous pulleys (11), an auxiliary pulley (12), and a synchronous belt (13). The driving synchronous pulley (10) is fixedly connected to the output drive shaft of the gearbox (8) and located below the two driven synchronous pulleys (11). The two driven synchronous pulleys (11) are fixedly connected to the ends of the two stirring shafts (2). The auxiliary pulley (12) is located above the two driven synchronous pulleys (11) and is rotatably connected to the support frame (5). The synchronous belt (13) is wound around the driving synchronous pulley (10), the two driven synchronous pulleys (11), and the auxiliary pulley (12) and drives the two driven synchronous pulleys (11) to rotate relative to each other.

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