Low-temperature digital rheometer

Abstract

The invention relates to the technical field of drilling working fluid rheology testing instruments, in particular to a low-temperature digital rheometer which comprises an electric appliance control assembly, a cooling circulating pump assembly, a slurry cup cooling assembly, a rotating part lifting assembly, a rotary viscosity testing assembly and a heat preservation frame. According to the rheometer, a low-temperature cooling circulation system, an API pre-programming type digital rheological testing system and an anti-settling non-contact stirring system are integrated, so that the rheometer can adapt to a rheological property test in a low-temperature state in a range from minus 40 DEG C to room temperature, and various testing formulas of the API can be embedded into a chip by adopting a pre-programming mode; the traditional rheological measurement manual testing and manual reading modes are replaced, deviation accumulation caused by operation modes, methods and reading of all testers can be effectively reduced, rapidness and automation are achieved, and the labor cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of rheological testing instruments for drilling working fluid, in particular to a low-temperature digital rheometer. Background Art

[0002] With the development of deep-sea and polar scientific research drilling, there is an urgent need for an instrument that can simulate the rheological properties of drilling fluids under this state. Traditional rheological measurement and testing methods require a lot of manual operation and reading, and each tester will inevitably accumulate deviations in the operation method and reading. This will not only cause large deviations in the final data, but also be time-consuming and labor-intensive. Under this background, a low-temperature digital rheometer was developed.

[0003] The low-temperature digital rheometer can effectively solve the problems of large deviation in data reading, long cycle and high cost caused by manual operation, and can meet the potential market demand for low-temperature drilling rheological testing topics, and has a strong innovative support role in the development of the main business of this type of drilling fluid. Summary of the invention

[0004] The present invention provides a low-temperature digital rheometer, which overcomes the above-mentioned deficiencies of the prior art and can effectively solve the problems of large data deviation and long cycle in traditional rheological tests.

[0005] The technical solution of the present invention is achieved through the following measures: a low-temperature digital rheometer, including an electrical control component, a cooling circulation pump component, a slurry cup cooling component, a rotating part lifting component, a rotational viscosity testing component and an insulation frame, wherein the electrical control component, the cooling circulation pump component, the slurry cup cooling component, the rotating part lifting component, the rotational viscosity testing component and the insulation frame are integrated into one, the electrical control component and the insulation frame are both fixedly mounted on the upper side of the cooling circulation pump component, the slurry cup cooling component, the rotating part lifting component and the rotational viscosity testing component are all located in the insulation frame, the power output end of the rotating part lifting component is connected to the power input end of the rotational viscosity testing component through a transmission mechanism, and the power control end of the electrical control component is electrically connected to the power control ends of the cooling circulation pump component, the slurry cup cooling component, the rotating part lifting component and the rotational viscosity testing component, respectively.

[0006] The following are further optimizations and / or improvements to the above technical solutions: The above-mentioned rotating part lifting assembly includes a vertical movement driving mechanism, a rotating drive mechanism and a rotating assembly cover; the vertical movement driving mechanism includes a lifting synchronous motor, a lifting screw and a screw flange, a column and a column upper fixed seat installed in cooperation with the lifting screw, the lower part of the column is fixed to the upper side of the cooling circulation pump assembly, the column passes through the bottom plate of the rotating assembly cover, and the upper end of the column is fixedly connected to the column upper fixed seat, the power output end of the lifting synchronous motor is fixedly installed with the lower end of the lifting screw, the lifting screw passes through the bottom plate of the rotating assembly cover, and the lifting screw is fixedly connected to the bottom plate of the rotating assembly cover through the screw flange, and the upper end of the lifting screw is fixedly connected to the column upper fixed seat; the rotating drive mechanism includes a rotating synchronous motor, and the rotating synchronous motor is fixed to the said bottom plate through a motor fixed seat.

[0007] The above-mentioned rotational viscosity testing assembly comprises an inner cylinder, an upper rotating cylinder, a lower rotating cylinder, a deflection angle data acquisition module, and a torsion part. The upper end of the upper rotating cylinder sits on the side surface of the bottom plate, the lower part of the upper rotating cylinder and the upper part of the lower rotating cylinder are fixedly installed together, the lower rotating cylinder is located on the outer side of the inner cylinder, and there is a gap between the lower rotating cylinder and the inner cylinder, at least one group of bearings is fixedly installed between the inner cylinder and the lower rotating cylinder, an inner cylinder shaft is fixed on the inner cylinder, the upper end of the inner cylinder shaft is fixedly connected with the torsion part, an inner cylinder support disc sleeve is fixedly installed on the outer side of the inner cylinder shaft near the torsion part, the inner cylinder support disc sleeve is fixedly installed on the bottom plate through the disc sleeve support column, the deflection angle data acquisition module comprises a magnetic ring, a chip, a data acquisition circuit board and a Hall sensor, the data acquisition circuit board is fixed on the inner cylinder support disc sleeve through a support rod, the magnetic ring is fixedly installed on the torsion part, the chip is fixedly installed on the acquisition circuit board near the magnetic ring, and the Hall sensor is fixedly installed on the data acquisition circuit board.

[0008] The transmission mechanism includes a main synchronous pulley, a slave synchronous pulley and a transmission belt. The main synchronous pulley is installed on the power output end of the rotating synchronous motor, and the slave synchronous pulley is on the outer side of the upper part of the upper rotating drum. The main synchronous pulley and the slave synchronous pulley are connected by a transmission belt.

[0009] The above-mentioned slurry cup cooling group includes a mud cup, a cooling insulation sleeve and a magnetic stirring assembly. The mud cup is located on the inner side of the cooling insulation sleeve. Cooling liquid ring cavities are provided on the outer side of the mud cup and the inner side of the cooling insulation sleeve. The outer side of the upper end of the mud cup is threadedly connected to the outer side of the upper end of the cooling insulation sleeve; the magnetic stirring assembly includes a magnetic stirring rotor and a magnetic stirring motor. The magnetic stirring rotor is placed in the mud cup, and the magnetic stirring motor is fixed under the mud cup through a motor seat.

[0010] The cooling circulation pump assembly comprises a cooling circulation pump, and a liquid outlet end of the cooling circulation pump is communicated with the cooling liquid ring cavity.

[0011] The above-mentioned electrical control component includes a controller, a touch screen, a lifting synchronous motor driver, a rotating synchronous motor driver and a magnetic stirring motor controller. The controller is communicatively connected to the touch screen. The controller is electrically connected to the lifting synchronous motor driver, the rotating synchronous motor driver, the magnetic stirring motor, and the cooling circulation pump respectively. The lifting synchronous motor driver is electrically connected to the lifting synchronous motor, and the rotating synchronous motor driver is electrically connected to the rotating synchronous motor.

[0012] This rheometer integrates a low-temperature cooling circulation system, an API pre-programmed digital rheological test system, and an anti-sedimentation contactless stirring system, so that the rheometer can adapt to low-temperature rheological performance tests in the range of -40°C to room temperature. It can also use a pre-programmed mode to embed API test formulas into the chip, replacing traditional manual testing and manual reading methods for rheological measurements. This can effectively reduce the accumulation of deviations caused by the operating methods and readings of each tester, achieve speed and automation, and reduce labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attached Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0014] Attached Figure 2 Schematic diagram of the main view partial cross-section structure.

[0015] Attached Figure 3 It is a partially enlarged schematic diagram of the rotational viscosity testing assembly of the present invention.

[0016] The codes in the accompanying drawings are: 1 is an electrical control component, 2 is a cooling circulation pump component, 3 is a slurry cup cooling component, 4 is a rotating part lifting component, 5 is a rotating viscosity testing component, 6 is a heat preservation frame, 7 is a rotating component cover, 8 is a lifting synchronous motor, 9 is a lifting screw, 10 is a screw flange, 11 is a column, 12 is a fixed seat on the column, 13 is a bottom plate, 14 is a rotating synchronous motor, 15 is an inner cylinder, 16 is an upper rotating cylinder, 17 is a lower rotating cylinder, 18 is a torsion part, 19 is a bearing, 20 is an inner cylinder shaft, 21 is an inner cylinder support disc sleeve, 22 is a disc sleeve support column, 23 is a magnetic ring, 24 is a chip, 25 is a data acquisition circuit board, 26 is a main synchronous pulley, 27 is a slave synchronous pulley, 28 is a mud cup, 29 is a cooling and heat preservation sleeve, 30 is a coolant ring cavity, 31 is a magnetic stirring rotor, 32 is a magnetic stirring motor, and 33 is a touch screen. DETAILED DESCRIPTION

[0017] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0018] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1The layout is described in detail, such as the positional relationship of front, back, top, bottom, left, right, etc., which is based on the attached manual. Figure 1 It is determined by the layout direction.

[0019] In the present invention, unless otherwise specified, the devices, electrical appliances and corresponding connection methods used are conventional devices, electrical appliances and conventional connection methods.

[0020] Unless otherwise specified, the various chemical reagents and chemicals mentioned in the present invention are all chemical reagents and chemicals commonly known in the prior art; the percentages in the present invention are all mass percentages unless otherwise specified; the solutions in the present invention are all aqueous solutions with water as the solvent unless otherwise specified, for example, a hydrochloric acid solution is an aqueous hydrochloric acid solution.

[0021] The present invention will be further described below in conjunction with embodiments: Embodiment 1: As attached Figures 1 to 3 As shown, the low-temperature digital rheometer includes an electrical control component 1, a cooling circulation pump component 2, a slurry cup cooling component 3, a rotating part lifting component 4, a rotational viscosity testing component 5 and a heat preservation frame 6. The electrical control component 1, the cooling circulation pump component 2, the slurry cup cooling component 3, the rotating part lifting component 4, the rotational viscosity testing component 5 and the heat preservation frame 6 are integrated into one. The electrical control component 1 and the heat preservation frame 6 are both fixedly mounted on the upper side of the cooling circulation pump component 2, the slurry cup cooling component 3, the rotating part lifting component 4, and the rotational viscosity testing component 5 are all located in the heat preservation frame 6, the power output end of the rotating part lifting component 4 is connected to the power input end of the rotational viscosity testing component 5 through a transmission mechanism, and the power control end of the electrical control component 1 is electrically connected to the power control ends of the cooling circulation pump component 2, the slurry cup cooling component 3, the rotating part lifting component 4, and the rotational viscosity testing component 5 respectively.

[0022] The following are further optimizations and / or improvements to the above technical solutions: Embodiment 2: As attached Figure 2As shown, as an optimization of the above embodiment, the rotating part lifting component 4 includes a vertical movement drive mechanism, a rotation drive mechanism and a rotating component cover 7; the vertical movement drive mechanism includes a lifting synchronous motor 8, a lifting screw 9 and a screw flange 10, a column 11 and a column upper fixed seat 12 installed in cooperation with the lifting screw 9, the lower part of the column 11 is fixed to the upper side of the cooling circulation pump component 2, the column 11 passes through the bottom plate 13 of the rotating component cover 7, and the upper end of the column 11 is fixedly connected to the column upper fixed seat 12, the power output end of the lifting synchronous motor 8 is fixedly installed with the lower end of the lifting screw 9, the lifting screw 9 passes through the bottom plate 13 of the rotating component cover 7, and the lifting screw 9 is fixedly connected to the bottom plate 13 of the rotating component cover 7 through the screw flange 10, and the upper end of the lifting screw 9 is fixedly connected to the column upper fixed seat 12; the rotation drive mechanism includes a rotating synchronous motor 14, and the rotating synchronous motor 14 is fixed to the said bottom plate 13 through a motor fixed seat.

[0023] Start the lifting synchronous motor 8 to drive the lifting screw 9 to rotate. The screw flange 10 that cooperates with the lifting screw 9 drives the rotating component cover 7 to move up and down, so as to drive the rotating viscosity test component 5 to move up and down, that is, control the forward and reverse rotation of the lifting synchronous motor 8 to drive the rotating viscosity test component 5 to move up or down.

[0024] The lifting synchronous motor 8 can adopt a hysteresis synchronous motor. Limit blocks or limit switches can be installed at the upper and lower ends of the lifting screw 9.

[0025] Embodiment 3: As attached Figure 2 , 3 As shown, as an optimization of the above embodiment, the rotational viscosity test assembly 5 includes an inner cylinder 15, an upper rotating cylinder 16, a lower rotating cylinder 17, a deflection angle data acquisition module, and a torsion portion 18. The upper end of the upper rotating cylinder 16 is seated on the upper side of the bottom plate 13, the lower part of the upper rotating cylinder 16 is fixedly installed with the upper part of the lower rotating cylinder 17, the lower rotating cylinder 17 is located outside the inner cylinder 15, and there is a gap between the lower rotating cylinder 17 and the inner cylinder 15, at least one set of bearings 19 is fixedly installed between the inner cylinder 15 and the lower rotating cylinder 17, an inner cylinder shaft 20 is fixed on the inner cylinder 15, and the upper end of the inner cylinder shaft 20 is fixedly connected with a torsion portion 18. The rotating part 18, an inner cylinder support disc sleeve 21 is fixedly installed on the outer side of the inner cylinder shaft 20 close to the torsion part 18, and the inner cylinder support disc sleeve 21 is fixed on the base plate 13 through the disc sleeve support column 22. The deflection angle data acquisition module includes a magnetic ring 23, a chip 24, a data acquisition circuit board 25 and a Hall sensor. The data acquisition circuit board 25 is fixed on the inner cylinder support disc sleeve 21 through a support rod, the magnetic ring 23 is fixedly installed on the torsion part 18, the chip 24 is fixedly installed on the acquisition circuit board close to the magnetic ring 23, and the Hall sensor is fixedly installed on the data acquisition circuit board 25.

[0026] The distance between the magnetic ring 23 and the chip 24 is less than 0.5 mm, preferably 0.3 mm.

[0027] A drum shield surrounding the upper drum 16 is fixed to the bottom surface of the bottom plate 13. The chip 24 is an A44E chip 24.

[0028] The gap between the lower drum 17 and the inner drum 15 is filled with the mud to be tested. When the lower drum 17 rotates, it will drive the mud to rotate. The mud will drive the inner drum 15 to rotate and deviate due to its own viscosity, so that the torsion part 18 deflects in the same direction, and the magnetic ring 23 also moves synchronously. At this time, the chip 24 generates a potential difference due to the Hall effect, and the acquisition circuit board amplifies the signal and transmits it to the data calculation and display system to complete the final data acquisition.

[0029] Embodiment 4: As attached Figure 2 As shown, as an optimization of the above embodiment, the transmission mechanism includes a main synchronous pulley 26, a slave synchronous pulley 27 and a transmission belt, the main synchronous pulley 26 is installed on the power output end of the rotating synchronous motor 14, the slave synchronous pulley 27 is on the outer side of the upper part of the upper rotating drum 16, and the main synchronous pulley 26 and the slave synchronous pulley 27 are connected by a transmission belt.

[0030] The main synchronous pulley 26 drives the slave synchronous pulley 27 to rotate through the transmission belt, thereby driving the upper drum 16 and the lower drum 17 to rotate.

[0031] Embodiment 5: As attached Figure 2 As shown, as an optimization of the above embodiment, the slurry cup cooling group includes a mud cup 28, a cooling insulation sleeve 29 and a magnetic stirring assembly. The mud cup 28 is located on the inner side of the cooling insulation sleeve 29. A cooling liquid ring cavity 30 is provided on the outer side of the mud cup 28 and the inner side of the cooling insulation sleeve 29. The outer side of the upper end of the mud cup 28 is threadedly connected to the outer side of the upper end of the cooling insulation sleeve 29. The magnetic stirring assembly includes a magnetic stirring rotor 31 and a magnetic stirring motor 32. The magnetic stirring rotor 31 is placed in the mud cup 28, and the magnetic stirring motor 32 is fixed under the mud cup 28 through a motor seat.

[0032] The cooling and heat preservation sleeve 29 adopts a direct contact heat exchange design, and the cooling speed is fast. The mud cup 28 and the cooling and heat preservation sleeve 29 are threadedly connected, and a low-temperature resistant sealing ring can be installed at the joint. The mud cup 28 is in direct contact with the coolant, ensuring fast cooling and convenient cleaning. The magnetic stirring component realizes non-contact stirring of the test sample and effectively prevents sample sedimentation in a low-temperature insulation environment.

[0033] Embodiment 6: As an optimization of the above embodiment, as needed, the cooling circulation pump assembly 2 includes a cooling circulation pump, and the liquid outlet end of the cooling circulation pump is connected to the coolant ring cavity 30.

[0034] Embodiment 7: As an optimization of the above embodiment, as needed, the electrical control component 1 includes a controller, a touch screen 33, a lifting synchronous motor driver, a rotating synchronous motor driver and a magnetic stirring motor controller. The controller is communicatively connected to the touch screen 33, and the controller is electrically connected to the lifting synchronous motor driver, the rotating synchronous motor driver, the magnetic stirring motor 32, and the cooling circulation pump respectively. The lifting synchronous motor driver is electrically connected to the lifting synchronous motor 8, and the rotating synchronous motor driver is electrically connected to the rotating synchronous motor 14.

[0035] The electrical control component 1 also includes a power supply and a power transformer required for conventional power supply. The power supply can be a DC 24V2.3A power supply. The touch screen 33 can adopt a Samkoon SK series touch screen 33. A one-button start can be set on the touch screen 33, or it can be set separately, such as a power button and a switch button for each component. The controller can adopt a PLC controller, and the PLC controller can adopt a Xinjie PLC controller. The low-temperature digital rheometer can also be provided with a USB interface or a network port, and the PLC controller is connected to the USB interface or the network port for communication. Lifting synchronous motor driver model: Yaskawa CA-4069M, rotating synchronous motor driver model: Pfede TB6600.

[0036] This rheometer integrates the low-temperature cooling circulation system (paddle cup cooling component 3), API pre-programmed digital rheological test system (rotational viscosity test component 5), and anti-sedimentation contactless stirring system (magnetic stirring component), so that the rheometer can adapt to the low-temperature rheological performance test in the range of -40℃ to room temperature, and synchronously matches the functions of contactless magnetic stirring, timing, temperature display, USB or network port communication, etc., which plays a good leading role in the automation and intelligence of rheological testing. It has a high value of promotion and application.

[0037] The API test formulas are embedded into the chip 24 in a pre-programmed mode, replacing the traditional manual testing and manual reading of rheological measurements. This can effectively reduce the accumulated deviations caused by the operation methods and readings of each tester, achieve speed and automation, and reduce labor costs.

[0038] The present invention has the following technical innovations: 1) The low temperature digital rheometer integrates automatic collection of rheological test data, API pre-programmed formulas in a chip 24 and a human-computer interactive operation interface (touch screen 33); 2) The rheological test data acquisition system (deflection angle data acquisition module) can communicate and store with the computer software; 3) Through the reasonable design and layout of the insulation components (pump cooling group, cooling circulation pump component 2), the heat exchange between the refrigerant and the sample under the low-temperature circulation state is effectively achieved; 4) The lifting assembly is controlled by a hysteresis synchronous motor and the upper and lower limit stops are installed to achieve the rheological test state and the position control effect of the upper and lower drums 17 and the mud cup 28, making the operation more convenient for personnel; The specific rheological test experiment using this low-temperature digital rheometer is as follows: Test experiment 1 Three different types of polymer additives, 1, 2, and 3, were selected for experiments (the default addition amount was 2%) to explore the effect of polymer additives on the rheological properties of drilling fluids. The optimal additive was selected mainly based on the size of dynamic shear force and supplemented by plastic viscosity.

[0039] Experimental drugs: 4# aviation kerosene, 5# white oil (QY), polymer 1 (variable polymer latex), polymer 2 (active silicone), polymer 3 (polyacrylamide potassium salt), emulsifier (fatty acid amide), cutting agent (organic soil) Experimental steps: (experimental temperature condition is -40℃) 1) 224ml 4 # Aviation kerosene and 96ml 5 # Add 3% emulsifier to the white oil (QY) mixture and stir at high speed for 10 minutes; 2) Add 2.5% shearing agent and stir at high speed for 15 minutes; 3) Add 2% polymer additive (polymer 1 or polymer 2 or polymer 3) and stir at high speed for 15 to 25 minutes; 4) Measure the rheological properties of the drilling fluid system at -40°C.

[0040] Experimental formula: base liquid + 3% emulsifier + 2.5% shearing agent + 2% polymer (experimental temperature condition is -40℃) The experimental data of rheological properties of the drilling fluid system composed of three polymers are shown in Table 1.

[0041] It can be seen from Table 1 that the formula formed by polymer 3 has small shear force and dynamic plastic ratio. The formula formed by polymer 2 has large shear force and dynamic plastic ratio. This shows that polymer 3 has little effect on the rheological properties of drilling fluid, proving that the system formed by this polymer has good compatibility.

[0042] Test experiment 2 -35# diesel and low-temperature white oil were selected respectively, and formulation experiments of -35# diesel and low-temperature white oil were carried out to explore the low-temperature resistance of the base oil of the low-temperature drilling fluid system. The optimal base oil was selected mainly by considering the size of dynamic shear force as the main factor and static shear force as the auxiliary factor.

[0043] Experimental chemicals: -35# diesel, low temperature white oil, wetting agent (modified fatty acid amide), fluid loss reducer (methacrylate copolymer), calcium oxide (CaO), primary emulsifier (fatty acid amide), auxiliary emulsifier (alkanolamide), shear enhancer (organic soil). The modified fatty acid amide is an amide-amine oil-based drilling fluid wetting agent recorded in the patent document with patent application number 201310738747.2.

[0044] Experimental steps: (experimental temperature condition is -30℃) 1) Add 2.8% emulsifier (primary emulsifier + auxiliary emulsifier) ​​to the mixture of -35# diesel and low-temperature white oil according to the basic formula, and stir at high speed for 10 minutes; 2) Add 1% shearing agent and stir at high speed for 15 minutes; 3) Add 1.5% wetting agent and stir at high speed for 15 minutes; 4) Add 3% filtrate reducer and stir at high speed for 15 minutes; 5) Add base oil to the basic formula in different amounts and measure the rheological properties of the drilling fluid system at -30°C.

[0045] Basic formula: (-35 # Diesel: 20% CaCl2 mass ratio) = 90:10 + 10% low temperature white oil + 0.8% main emulsion + 2% auxiliary emulsion + 1.5% wetting agent + 1% organic soil + 5% CaO + 3% fluid loss reducer + barite (experimental temperature condition is -30℃) The experimental data of rheological properties of base oil in low temperature oil-based drilling fluid system are shown in Table 2.

[0046] It can be seen from Table 2 that the drilling fluid adjusted by low temperature white oil has better fluidity, indicating that low temperature white oil can effectively adjust the rheological properties of drilling fluid. # Diesel is more suitable as the base oil for low-temperature oil-based drilling fluid systems.

[0047] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

[0048] The working process of the low-temperature digital rheometer is as follows: click the power button on the touch screen 33, and after power is supplied, the various components of the low-temperature digital rheometer enter the self-test state, which lasts for about 10 seconds; unscrew the mud cup 28 counterclockwise, insert the sample according to the engraved line, and tighten it clockwise; rotate the inner cylinder 15 clockwise and confirm that it is firmly installed, and tighten the lower rotating cylinder 17 clockwise to ensure that it is installed in place; according to the test requirements, click the cooling circulation pump switch on the touch screen 33 to start the cooling circulation pump, turn on the power of the cooling circulation pump, circulate, cool, and heat, and wait for the temperature to reach the test requirements; click the magnetic on the touch screen 33 Press the force stirring switch, at this time, the stirring rotor starts to stir the sample according to the set value; click the down switch on the touch screen 33, at this time, the lifting synchronous motor 8 is activated to drive the entire rotating test assembly to descend to the lower limit, and the lifting switch returns to the stop position; operate the start button on the touch screen 33 to start according to the test requirements, at this time, the lower drum 17 starts to rotate, driving the torsion part 18 to deflect in the same direction, and the magnetic ring 23 also moves synchronously. At this time, the chip 24 generates a potential difference due to the Hall effect, and the data acquisition circuit board 25 amplifies the signal and transmits it to the data calculation and display system to complete the final data acquisition.

Claims

1. A low temperature digital rheometer, characterized in that It includes an electrical control component, a cooling circulation pump component, a slurry cup cooling component, a rotating part lifting component, a rotating viscosity testing component and a heat preservation frame, wherein the electrical control component, the cooling circulation pump component, the slurry cup cooling component, the rotating part lifting component, the rotating viscosity testing component and the heat preservation frame are integrated into one, the electrical control component and the heat preservation frame are fixedly mounted on the upper side of the cooling circulation pump component, the slurry cup cooling component, the rotating part lifting component and the rotating viscosity testing component are all located in the heat preservation frame, the power output end of the rotating part lifting component is connected to the power input end of the rotating viscosity testing component through a transmission mechanism, and the power control end of the electrical control component is electrically connected to the power control ends of the cooling circulation pump component, the slurry cup cooling component, the rotating part lifting component and the rotating viscosity testing component respectively.

2. The low temperature digital rheometer according to claim 1, characterized in that The lifting assembly of the rotating part includes a vertical movement drive mechanism, a rotation drive mechanism and a rotating assembly cover; the vertical movement drive mechanism includes a lifting synchronous motor, a lifting screw and a screw flange, a column and a fixed seat on the column that are installed in cooperation with the lifting screw. The lower part of the column is fixed to the upper side of the cooling circulation pump assembly, the column passes through the bottom plate of the rotating assembly cover, and the upper end of the column is fixedly connected to the fixed seat on the column. The power output end of the lifting synchronous motor is fixedly installed with the lower end of the lifting screw, the lifting screw passes through the bottom plate of the rotating assembly cover, and the lifting screw is fixedly connected to the bottom plate of the rotating assembly cover through the screw flange, and the upper end of the lifting screw is fixedly connected to the fixed seat on the column; the rotating drive mechanism includes a rotating synchronous motor, and the rotating synchronous motor is fixed to the said bottom plate through a motor fixed seat.

3. The low temperature digital rheometer according to claim 2, characterized in that The transmission mechanism includes a main synchronous pulley, a slave synchronous pulley and a transmission belt. The main synchronous pulley is installed on the power output end of the rotating synchronous motor, and the slave synchronous pulley is on the outer side of the upper part of the upper rotating drum. The main synchronous pulley and the slave synchronous pulley are connected by a transmission belt.

4. The low temperature digital rheometer according to claim 1, 2 or 3, characterized in that The rotational viscosity testing assembly comprises an inner cylinder, an upper rotating cylinder, a lower rotating cylinder, a deflection angle data acquisition module, and a torsion part. The upper rotating cylinder is seated on the side surface of the bottom plate, the lower part of the upper rotating cylinder is fixedly installed with the upper part of the lower rotating cylinder, the lower rotating cylinder is located on the outer side of the inner cylinder, and there is a gap between the lower rotating cylinder and the inner cylinder, at least one group of bearings is fixedly installed between the inner cylinder and the lower rotating cylinder, an inner cylinder shaft is fixed on the inner cylinder, the upper end of the inner cylinder shaft is fixedly connected with the torsion part, an inner cylinder support disc sleeve is fixedly installed on the outer side of the inner cylinder shaft near the torsion part, the inner cylinder support disc sleeve is fixedly installed on the bottom plate through the disc sleeve support column, the deflection angle data acquisition module comprises a magnetic ring, a chip, a data acquisition circuit board and a Hall sensor, the data acquisition circuit board is fixed on the inner cylinder support disc sleeve through a support rod, the magnetic ring is fixedly installed on the torsion part, the chip is fixedly installed on the acquisition circuit board near the magnetic ring, and the Hall sensor is fixedly installed on the data acquisition circuit board.

5. The low temperature digital rheometer according to claim 1, 2 or 3, characterized in that The slurry cup cooling group includes a mud cup, a cooling and thermal insulation sleeve and a magnetic stirring assembly. The mud cup is located on the inner side of the cooling and thermal insulation sleeve. Cooling liquid ring cavities are provided on the outer side of the mud cup and the inner side of the cooling and thermal insulation sleeve. The outer side of the upper end of the mud cup is threadedly connected to the outer side of the upper end of the cooling and thermal insulation sleeve. The magnetic stirring assembly includes a magnetic stirring rotor and a magnetic stirring motor. The magnetic stirring rotor is placed in the mud cup, and the magnetic stirring motor is fixed under the mud cup through a motor seat.

6. The low temperature digital rheometer according to claim 4, characterized in that The slurry cup cooling group includes a mud cup, a cooling and thermal insulation sleeve and a magnetic stirring assembly. The mud cup is located on the inner side of the cooling and thermal insulation sleeve. Cooling liquid ring cavities are provided on the outer side of the mud cup and the inner side of the cooling and thermal insulation sleeve. The outer side of the upper end of the mud cup is threadedly connected to the outer side of the upper end of the cooling and thermal insulation sleeve. The magnetic stirring assembly includes a magnetic stirring rotor and a magnetic stirring motor. The magnetic stirring rotor is placed in the mud cup, and the magnetic stirring motor is fixed under the mud cup through a motor seat.

7. The low temperature digital rheometer according to claim 1 or 2 or 3 or 6, characterized in that The cooling circulation pump assembly comprises a cooling circulation pump, and a liquid outlet end of the cooling circulation pump is communicated with the cooling liquid ring cavity.

8. The low temperature digital rheometer according to claim 4, characterized in that The cooling circulation pump assembly comprises a cooling circulation pump, and a liquid outlet end of the cooling circulation pump is communicated with the cooling liquid ring cavity.

9. The low temperature digital rheometer according to claim 5, characterized in that The cooling circulation pump assembly comprises a cooling circulation pump, and a liquid outlet end of the cooling circulation pump is communicated with the cooling liquid ring cavity.

10. The low temperature digital rheometer according to claim 1 or 2 or 3 or 6 or 8 or 9, characterized in that The electrical control component includes a controller, a touch screen, a lifting synchronous motor driver, a rotating synchronous motor driver and a magnetic stirring motor controller. The controller is communicatively connected to the touch screen. The controller is electrically connected to the lifting synchronous motor driver, the rotating synchronous motor driver, the magnetic stirring motor, and the cooling circulation pump respectively. The lifting synchronous motor driver is electrically connected to the lifting synchronous motor, and the rotating synchronous motor driver is electrically connected to the rotating synchronous motor.

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