Device for measuring shield slurry density and Markov funnel viscosity and use method thereof

Abstract

The invention discloses a device for measuring shield slurry density and Markov funnel viscosity and a use method thereof, and relates to the technical field of shield construction, the device comprises a water circulation temperature control unit, an automatic slurry collection unit, a cone Markov funnel unit, a slurry receiving unit, a cleaning and drying unit, a foundation frame unit and a control unit; the water circulation temperature control unit is connected with the automatic slurry collecting unit through a circulation pipeline, slurry is collected by the automatic slurry collecting unit and flows to the slurry receiving unit through the cone Markov funnel unit, the slurry Markov funnel measures viscosity, and the slurry density is calculated according to data collected by the weighing sensor. The cleaning and drying unit is used for cleaning and drying the automatic slurry collecting unit, the cone Markov funnel unit and the slurry receiving unit; the system has the advantages that temperature influence can be avoided, unmanned operation is achieved, data can be uploaded in time, the measurement precision is high, the automation degree is high, the data sharing performance is high, and the scientificity and the automation level of shield construction decision making are improved.

Description

Technical Field

[0001] The invention relates to the technical field of shield construction, in particular to a device for measuring shield slurry density and Marsh funnel viscosity and a use method thereof. Background Art

[0002] Shields are widely used as mechanized tunnel construction equipment, among which slurry shields are adopted in many projects due to their small ground settlement and adaptability to high water pressure environments. In slurry shield construction, mud is used as a support medium for the face and also as a slag-carrying medium. Its performance is directly related to the stability of the face and the movement of slag. Since manual measurement of mud density and Marsh funnel is labor-intensive and has low measurement accuracy, it is impossible to timely associate data with the existing information platform and adjust mud parameters in time, which affects the construction of the shield. How to measure mud parameters and obtain mud density and Marsh funnel viscosity is of great significance for accurately mastering mud parameters and improving construction efficiency. It is a technical problem that needs to be solved urgently by technical personnel in this field. It is also of great significance for expanding the parameters of the mud-water circulation system in construction and its intelligence. Summary of the invention

[0003] Aiming at the need of measuring the density and viscosity of slurry in slurry shield, from the perspective of improving the measurement accuracy, automation and data interactivity, a device for measuring the density of shield slurry and the viscosity of Marsh funnel and its use method are proposed. The device overcomes the shortcomings of slurry index being affected by temperature, manual measurement requiring the cooperation of ≥2 people and insufficient measurement accuracy. It can get rid of the influence of temperature, unmanned operation, real-time data upload and no human intervention. It has high measurement accuracy, low data acquisition cost, high degree of automation and strong data sharing, which can improve the scientificity and automation level of shield construction decision-making.

[0004] The present invention achieves the above-mentioned purpose through the following technical solutions: A device for measuring the density and Marsh funnel viscosity of shield mud comprises a water circulation temperature control unit, a mud automatic collection unit, a cone Marsh funnel unit, a mud receiving unit, a cleaning and drying unit, a basic frame unit and a control unit; the water circulation temperature control unit is connected to the mud automatic collection unit through a water circulation pipeline, the mud is collected by the mud automatic collection unit, flows to the mud receiving unit through the cone Marsh funnel unit, completes the mud Marsh funnel viscosity measurement, calculates the mud density based on the data collected by the weighing sensor of the mud receiving unit, and uses the cleaning and drying unit to clean and dry the above-mentioned mud automatic collection unit, cone Marsh funnel unit and mud receiving unit; the water circulation temperature control unit, the mud automatic collection unit, the cone Marsh funnel unit, the mud receiving unit and the cleaning and drying unit are all electrically connected to the control unit; the water circulation temperature control unit, the mud automatic collection unit, the cone Marsh funnel unit, the mud receiving unit, the cleaning and drying unit and the control unit are all installed on the basic frame unit.

[0005] Preferably: the water circulation temperature control unit comprises an inlet pipeline, an inlet switch solenoid valve, a water tank, a stirring actuator, a refrigerator, a heater, a drainage pipeline, a first temperature sensor, an outlet switch solenoid valve, a circulating outlet pipe, an outlet pump, a circulating inlet pipe and an inlet pump; a stirring actuator for stirring water to ensure uniform temperature is installed on the top of the water tank, the stirring actuator comprises a motor and a propeller extending to the bottom of the water tank, a refrigerator and a heater are fixedly installed on the side of the water tank, a first temperature sensor is arranged inside the water tank, an inlet pipeline, an outlet pipeline, a circulating outlet pipe and a circulating inlet pipe are sealedly installed on the water tank, an inlet switch solenoid valve and an outlet switch solenoid valve are respectively arranged on the inlet pipeline and the outlet pipeline, a water outlet pump and an inlet pump are respectively arranged on the circulating outlet pipe and the circulating inlet pipe, and the inlet switch solenoid valve, the stirring actuator, the refrigerator, the heater, the first temperature sensor, the outlet switch solenoid valve, the outlet pump and the inlet pump are all electrically connected to the control unit and are controlled by it.

[0006] Preferably: the automatic mud collection unit comprises a first stainless steel container, a mud transfer solenoid valve, a mud transfer pipeline, a second temperature sensor, a rack guide, a gear and a lifting motor; the first stainless steel container is a double-layer stainless steel shell structure, the inner layer is a mud sampling container, and the upper opening is used to filter the mud, and a temperature sensor is arranged on the inner layer of the first stainless steel container. A circulation pipeline is arranged in the interlayer of the shell of the first stainless steel container, and the two ends of the circulation pipeline extend out of the side of the first stainless steel container and are respectively sealed and connected with the circulation water outlet pipe and the circulation water inlet pipe; a mud transfer pipeline is arranged on the inner bottom surface of the first stainless steel container, and the mud transfer pipeline extends out of the side of the first stainless steel container; a mud transfer solenoid valve is arranged on the mud transfer pipeline; a rack is fixedly installed on the side of the first stainless steel container, and a rack guide is installed on the basic frame unit corresponding to the position of the rack, and the rack can move up and down on the rack guide; a lifting motor is fixedly installed on the upper end of the rack guide, and a gear is fixedly installed on the output end of the lifting motor, and the gear is meshed with the rack; the mud transfer solenoid valve, the second temperature sensor, and the stepper motor are electrically connected to and controlled by the control unit.

[0007] Preferably: the conical Marsh funnel unit includes a first rack slide, a movable workbench, a conical Marsh funnel and a mud discharge solenoid valve; a rack is provided on the upper surface of the first rack slide, the movable workbench is clamped on the first rack slide and moves, the movable workbench has a built-in stepper motor and a gear, the gear is fixedly mounted on the output end of the stepper motor, the gear is meshed with the rack on the first rack slide, a conical Marsh funnel is installed on the upper part of the movable workbench, a mud discharge solenoid valve is installed at the bottom of the conical Marsh funnel, the end of the mud transfer pipeline away from the first stainless steel container is set to a 90° elbow facing the axis direction of the conical Marsh funnel, the movable workbench and the mud discharge solenoid valve are electrically connected to and controlled by the control unit.

[0008] Preferably: the mud receiving unit includes a mobile motor, a ball screw pair, a moving guide rail, a weighing sensor, a second stainless steel container and a photoelectric sensor; the mobile motor is installed on the basic frame unit, the output end of the mobile motor is connected to the moving guide rail through a ball screw pair, the moving guide rail is fixedly mounted with a weighing sensor, the weighing sensor is provided with a second stainless steel container, the lower part of the second stainless steel container is provided with a valve for discharging mud, and the second stainless steel container is installed with a photoelectric sensor; the stepping motor, the weighing sensor and the photoelectric sensor are respectively electrically connected to and controlled by the control unit.

[0009] Preferably: the cleaning and drying unit includes a second rack slide, a sliding box, an electric cylinder, a support rod and a blower; the second rack slide is installed on the basic frame unit, the sliding box is clamped on the second rack slide and moves, the sliding box has a built-in stepper motor and a gear, the gear is fixedly installed on the output end of the stepper motor, the gear is meshed with the rack on the second rack slide, the upper end of the sliding box is fixedly installed with an electric cylinder, the upper end of the electric cylinder is fixedly installed with a support rod, the upper end of the support rod is fixedly installed with a blower and a nozzle, the nozzle is connected to an external water supply system, the electric cylinder and the blower are respectively electrically connected to and controlled by the control unit.

[0010] Preferably, the basic frame unit is made of stainless steel.

[0011] Preferably: the control unit can be a PLC, a single chip microcomputer or a computer; the control unit is provided with a data interface for receiving instructions and transmitting data.

[0012] A method for using a device for measuring the density and Marsh funnel viscosity of shield slurry, using the above-mentioned device for measuring the density and Marsh funnel viscosity of shield slurry, comprising the following steps: Step S1: assembling a water circulation temperature control unit, a mud automatic collection unit, a cone Marsh funnel unit, a mud receiving unit, a cleaning and drying unit, and a control unit; Step S2: The control unit controls the automatic mud collection unit to move downward to collect mud. After staying at the lowest position for a set time according to the program design, the automatic mud collection unit moves upward to the upper limit position to complete the mud collection work; Step S3: The control unit collects the temperature in the automatic mud collection unit. If the temperature is within the set temperature range, no temperature adjustment is required. If the temperature is out of the range, the control unit turns on the water inlet switch solenoid valve, turns off the water outlet switch solenoid valve, collects the temperature of the first temperature sensor, turns on the water outlet pump and the water inlet pump, and at the same time, according to the comparison between the temperature of the first temperature sensor and the required temperature range of the mud, selects to turn on the refrigerator or the heater; Step S4: After the mud in the first stainless steel container is adjusted to the set temperature range, the movable workbench moves to the left limit, the moving guide rail moves to the right limit, the mud discharge solenoid valve is closed, and the mud transfer solenoid valve is opened, and the mud flows into the conical Martens funnel. During the process, the opening of the mud transfer solenoid valve is first large and then small, ensuring that 1500ML of mud is injected into the conical Martens funnel; Step S5: The cone-shaped Marsh funnel is filled with mud. After 10-15 seconds, the motion guide rail moves to the left limit position to remain stable. The weighing sensor starts weighing, and the mud discharge solenoid valve is opened to start timing. The timing stops after the light signal of the photoelectric sensor is interrupted. The weighing sensor starts weighing again. The control unit calculates the timing time interval as the Marsh funnel viscosity. The difference between the two weighing masses of the weighing sensor is divided by the received mud volume to obtain the mud density. The control unit sends the data to the designated IP location or device. Step S6: Open the mud transfer solenoid valve, the mud discharge solenoid valve and the valve of the second stainless steel container, and move the sliding box to spray water from right to left to flush the mud; after flushing, open the support rod to lower the position of the blower, turn on the blower for drying, and then close all valves and equipment.

[0013] Preferably, the step S1 specifically includes the following steps: Step a, water circulation temperature control unit, the water inlet pipe is connected to the external water supply system, the drainage pipe is installed away from the water tank and towards the mud pool for direct drainage, and the first temperature sensor should be installed to avoid interference with the stirring actuator to damage the first temperature sensor; the circulation outlet pipe and the circulation inlet pipe are both hoses; Step b, the circulating water inlet pipe and the circulating water outlet pipe are respectively connected to the circulating pipeline in the interlayer of the first stainless steel container shell, the basic frame unit is arranged to avoid the position of the automatic mud collection unit, and it is ensured that the automatic mud collection unit can move freely up and down without interfering with other structural parts under the drive of the lifting motor, and the automatic mud collection unit is arranged directly above the mud pool, and can allow the first stainless steel container to collect enough mud; Step c: After the cone Martens funnel unit is assembled, it can slide on the track, and slide to the extreme position close to the automatic mud collection unit to allow the mud discharged from the mud transfer pipeline to enter the cone Martens funnel; Step d, the mud receiving unit is located below the conical Marsh funnel unit, and when the moving motor drives the moving guide rail to move to the left limit position, the lower end of the conical Marsh funnel coincides with the test range of the photoelectric sensor, and the weighing sensor moves to the left limit to ensure that the mud overflowing from the conical Marsh funnel cannot enter the mud receiving unit, thereby avoiding affecting the measurement results; Step e: The sliding box can move horizontally, and the flushing range is required to cover the mud automatic collection unit, the cone Marsh funnel unit, and the mud receiving unit; Step f: The control unit is electrically connected to the above-mentioned electrical components, and the data collection, data transmission and motion control functions are good.

[0014] Compared with the prior art, the present invention has the following beneficial effects: By using solenoid valves, photoelectric sensors and Marsh funnels, the timing starts from the opening time of the solenoid valve in the cone Marsh funnel unit, and the interruption of the optical signal of the photoelectric sensor of the mud receiving unit is the timing cut-off time. The time interval between the two is the Marsh funnel viscosity. In addition, with the help of a weighing sensor, the mud is weighed before receiving it, and then weighed again after receiving 946ML of mud, the mass of 946ML of mud can be obtained and its density value can be calculated. The data transmission interface of the control unit can upload the measurement data to the cloud platform in real time, and the automatic measurement of the shield mud density and Marsh funnel viscosity can be realized. The control unit can also receive measurement instructions through the data interface and measure according to the instructions. The above density and viscosity parameters can be accurately, regularly or irregularly (received by the control unit through a single measurement instruction), which improves the scientificity of the shield construction parameter regulation and provides data perception conditions for the intelligent mud water circulation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a structural schematic diagram of a device for measuring shield mud density and Marsh funnel viscosity according to the present invention.

[0017] The following are the descriptions of the reference numerals: 101, water inlet pipeline; 102, water inlet switch solenoid valve; 103, water tank; 104, stirring actuator; 105, refrigerator; 106, heater; 107, drainage pipeline; 108, first temperature sensor; 109, water outlet switch solenoid valve; 110, circulating water outlet pipe; 111, circulating water inlet pipe; 112, water outlet pump; 113, water inlet pump; 201, first stainless steel container; 202, mud transfer solenoid valve; 203, mud transfer pipeline; 204, second temperature sensor; 205, rack guide ; 206, gear; 207, lifting motor; 301, first rack slide; 302, mobile workbench; 303, conical Maghsen funnel; 304, mud discharge solenoid valve; 401, mobile motor; 402, ball screw pair; 403, motion guide rail; 404, weighing sensor; 405, second stainless steel container; 406, photoelectric sensor; 501, second rack slide; 502, sliding box; 503, electric cylinder; 504, support rod; 505, hair dryer; 6, basic frame unit; 7, control unit. DETAILED DESCRIPTION

[0018] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0020] The present invention will be further described below in conjunction with the accompanying drawings: like Figure 1As shown, a device for measuring the density and Marsh funnel viscosity of shield mud comprises a water circulation temperature control unit, a mud automatic collection unit, a cone Marsh funnel unit, a mud receiving unit, a cleaning and drying unit, a basic frame unit 6 and a control unit 7; the water circulation temperature control unit is connected to the mud automatic collection unit through a water circulation pipeline, the mud is collected by the mud automatic collection unit, flows to the mud receiving unit through the cone Marsh funnel unit, completes the measurement of the mud Marsh funnel viscosity, calculates the mud density based on the data collected by the weighing sensor 404 of the mud receiving unit, and uses the cleaning and drying unit to measure the above-mentioned mud automatic collection unit. The collection unit, the cone Marsh funnel unit, and the mud receiving unit are cleaned and dried; the water circulation temperature control unit, the mud automatic collection unit, the cone Marsh funnel unit, the mud receiving unit, and the cleaning and drying unit are all electrically connected to the control unit 7; the water circulation temperature control unit, the mud automatic collection unit, the cone Marsh funnel unit, the mud receiving unit, the cleaning and drying unit, and the control unit 7 are all installed on the basic frame unit 6, and the basic frame unit 6 is made of stainless steel; the control unit 7 can adopt PLC, single-chip microcomputer or computer; the control unit 7 is provided with a data interface for receiving instructions and data transmission.

[0021] The water circulation temperature control unit includes a water inlet pipeline 101, a water inlet switch solenoid valve 102, a water tank 103, a stirring actuator 104, a refrigerator 105, a heater 106, a drainage pipeline 107, a first temperature sensor 108, a water outlet switch solenoid valve 109, a circulating water outlet pipe 110, a water outlet pump 112, a circulating water inlet pipe 111 and a water inlet pump 113; a stirring actuator 104 for stirring water to ensure uniform temperature is installed on the top of the water tank 103, the stirring actuator 104 includes a motor and a propeller extending to the bottom of the water tank 103, a refrigerator 105 and a heater 106 are fixedly installed on the side of the water tank 103, a first temperature sensor 108 is arranged inside the water tank 103, the refrigerator 105 has a cooling function, and the heater 106 has a built-in resistance wire with a heating function. Function, the temperature is collected by the first temperature sensor 108 and transmitted to the control unit 7 to control the operation of the refrigerator 105 or the heater 106 to adjust the temperature. The water tank 103 is sealed with an inlet pipe 101, a water outlet pipe, a circulating water outlet pipe 110 and a circulating water inlet pipe 111. The inlet pipe 101 and the outlet pipe are respectively provided with an inlet switch solenoid valve 102 and a water outlet switch solenoid valve 109. The circulating water outlet pipe 110 and the circulating water inlet pipe 111 are respectively provided with a water outlet pump 112 and a water inlet pump 113. The inlet switch solenoid valve 102, the stirring actuator 104, the refrigerator 105, the heater 106, the first temperature sensor 108, the water outlet switch solenoid valve 109, the water outlet pump 112 and the water inlet pump 113 are all electrically connected to the control unit 7 and are controlled by it.

[0022] The automatic mud collection unit includes a first stainless steel container 201, a mud transfer solenoid valve 202, a mud transfer pipeline 203, a second temperature sensor 204, a rack guide 205, a gear 206 and a lifting motor 207; the first stainless steel container 201 is a double-layer stainless steel shell structure, the inner layer is a mud sampling container, the upper opening is used to filter the mud, the screen size diameter (1.6mm) is 12 mesh, the inner layer of the stainless steel structure has a volume of 2000-2500ML, and a temperature sensor is arranged on the inner layer of the first stainless steel container 201. A circulation pipeline is arranged in the interlayer of the shell of the first stainless steel container 201. The two ends of the circulation pipeline extend out of the side of the first stainless steel container 201 and are sealedly connected to the circulation outlet pipe 110 and the circulation inlet pipe 111 respectively. A mud transfer pipeline 203 is arranged on the bottom surface of the interior of the first stainless steel container 201. The mud transfer pipeline 203 extends out of the side of the first stainless steel container 201. A mud transfer solenoid valve 202 is arranged on the mud transfer pipeline 203. A rack is fixedly installed on the side of the first stainless steel container 201. A rack guide rail 205 is installed on the basic frame unit 6 at the corresponding position of the rack. The rack can move up and down on the rack guide rail 205. A lifting motor 207 is fixedly installed on the upper end of the rack guide rail 205. A gear 206 is fixedly installed on the output end of the lifting motor 207, and the gear 206 is meshed with the rack. The mud transfer solenoid valve 202, the second temperature sensor 204, and the stepper motor are electrically connected to and controlled by the control unit 7.

[0023] The cone Martens funnel unit includes a first rack slide 301, a mobile workbench 302, a cone Martens funnel 303 and a mud discharge electromagnetic valve 304; a rack is arranged on the upper surface of the first rack slide 301, the mobile workbench 302 is clamped on the first rack slide 301 and moves, the mobile workbench 302 has a built-in stepper motor and a gear 206, the gear 206 is fixedly mounted on the output end of the stepper motor, the gear 206 is meshed with the rack on the first rack slide 301, a cone Martens funnel 303 is installed on the upper part of the mobile workbench 302, and the cone Martens funnel 303 is installed on the upper part of the mobile workbench 302. The Magnito funnel 303 is made of stainless steel, with a capacity of 1500ML, a cone upper diameter of 152mm, a cone lower diameter and a guide tube diameter of 4.76mm, a length of 50.8mm, and a cone length of 305mm. A mud discharge solenoid valve 304 is installed at the bottom of the conical Magnito funnel 303, and the end of the mud transfer pipeline 203 away from the first stainless steel container 201 is set as a 90° elbow toward the axis direction of the conical Magnito funnel 303. The movable workbench 302 and the mud discharge solenoid valve 304 are electrically connected to and controlled by the control unit 7.

[0024] The mud receiving unit includes a mobile motor 401, a ball screw pair 402, a moving guide rail 403, a weighing sensor 404, a second stainless steel container 405 and a photoelectric sensor 406; the mobile motor 401 is installed on the basic frame unit 6, the output end of the mobile motor 401 is connected to the moving guide rail 403 through a ball screw pair, the weighing sensor 404 is fixedly installed on the moving guide rail 403, the weighing sensor 404 is provided with a second stainless steel container 405, the lower part of the second stainless steel container 405 is provided with a valve for discharging mud, the second stainless steel container 405 is installed with a photoelectric sensor 406, and the volume of the second stainless steel container 405 from the bottom to the installation position of the photoelectric sensor 406 is 946ML; the stepping motor, the weighing sensor 404 and the photoelectric sensor 406 are respectively electrically connected to and controlled by the control unit 7.

[0025] The cleaning and drying unit includes a second rack slide 501, a sliding box 502, an electric cylinder 503, a support rod 504 and a hair dryer 505; the second rack slide 501 is installed on the basic frame unit 6, the sliding box 502 is clamped on the second rack slide 501 and moves, the sliding box 502 has a built-in stepper motor and a gear 206, the gear 206 is fixedly installed on the output end of the stepper motor, the gear 206 is meshed with the rack on the second rack slide 501, the electric cylinder 503 is fixedly installed on the upper end of the sliding box 502, the support rod 504 is fixedly installed on the upper end of the electric cylinder 503, the hair dryer 505 and a nozzle are fixedly installed on the upper end of the support rod 504, the nozzle is connected to the external water supply system for flushing the equipment, the hair dryer 505 is used for blowing and drying, the electric cylinder 503 and the hair dryer 505 are respectively electrically connected to the control unit 7 and controlled by it.

[0026] A method for using a device for measuring the density and Marsh funnel viscosity of shield slurry, using the above-mentioned device for measuring the density and Marsh funnel viscosity of shield slurry, comprising the following steps: Step S1: assembling a water circulation temperature control unit, a mud automatic collection unit, a cone Marsh funnel unit, a mud receiving unit, a cleaning and drying unit and a control unit 7; Step S2: the control unit 7 controls the automatic mud collection unit to move downward to collect mud. After staying at the lowest position for a set time according to the program design, the automatic mud collection unit moves upward to the upper limit position to complete the mud collection work; Step S3: The control unit 7 collects the temperature in the automatic mud collection unit. If the temperature is within the range of 20±X°C (X is the set temperature range), no temperature adjustment is required. If the temperature is out of the range, the control unit 7 opens the water inlet switch solenoid valve 102, closes the water outlet switch solenoid valve 109, collects the temperature of the first temperature sensor 108, starts the water outlet pump 112 and the water inlet pump 113, and at the same time, according to the comparison between the temperature of the first temperature sensor 108 and the required temperature range of the mud, selects to open the refrigerator 105 (the temperature sensor temperature is high) or the heater 106 (the temperature sensor temperature is low); Step S4: After the mud in the first stainless steel container 201 is adjusted to the set temperature range, the movable workbench 302 is moved to the left limit position, the moving guide rail 403 is moved to the right limit position, the mud discharge solenoid valve 304 is closed, and the mud transfer solenoid valve 202 is opened, and the mud flows into the conical Martens funnel 303. During the process, the opening of the mud transfer solenoid valve 202 is first large and then small, ensuring that 1500ML of mud is injected into the conical Martens funnel 303; Step S5: The cone-shaped Marsh funnel 303 is filled with mud. After 10-15 seconds, the motion guide rail 403 moves to the left limit position to keep stable. The weighing sensor 404 starts weighing. The mud discharge electromagnetic valve 304 is opened to start timing. The timing is stopped after the light signal of the photoelectric sensor 406 is interrupted. The weighing sensor 404 starts weighing again. The control unit 7 calculates the timing time interval as the Marsh funnel viscosity. The weighing sensor 404 divides the two weighing time differences by the received mud volume 945ML to obtain the mud density. The control unit 7 sends the data to the designated IP location or device. The Marsh funnel viscosity refers to the time taken to inject a specific volume of mud, and the density is usually determined by the ratio of the mass difference obtained by two weighings to the volume. Step S6: Open the mud transfer solenoid valve 202, the mud discharge solenoid valve 304 and the valve of the second stainless steel container 405, and move the sliding box 502 to spray water from right to left to flush the mud; after flushing, open the support rod 504 to lower the position of the blower 505, turn on the blower 505 for drying, and then close all valves and equipment.

[0027] Step S1 specifically includes the following steps: Step a, water circulation temperature control unit, the water inlet pipe 101 is connected to the external water supply system, the drainage pipe 107 is installed away from the water tank 103 at one end toward the mud pool for direct drainage, and the first temperature sensor 108 is installed to avoid interference with the stirring actuator 104 to damage the first temperature sensor 108; the circulation outlet pipe 110 and the circulation inlet pipe 111 are both hoses; Step b, the circulating water inlet pipe 111 and the circulating water outlet pipe 110 are respectively connected to the circulating pipeline in the interlayer of the shell of the first stainless steel container 201, and the basic frame unit 6 is arranged to avoid the position of the automatic mud collection unit, so as to ensure that the automatic collection unit can move freely up and down without interfering with other structural parts under the drive of the lifting motor 207, and the automatic mud collection unit is arranged just above the mud pool, and can allow the first stainless steel container 201 to collect enough mud; Step c, after the cone Martens funnel unit is assembled, it can slide on the track, and slide to the extreme position close to the automatic mud collection unit to allow the mud discharged from the mud transfer pipeline 203 to enter the cone Martens funnel 303; Step d, the mud receiving unit is located below the cone Martens funnel unit, and when the moving motor 401 drives the moving guide rail 403 to move to the left limit position, the lower end of the cone Martens funnel 303 coincides with the test range of the photoelectric sensor 406, and the weighing sensor 404 moves to the left limit to ensure that the mud overflowing from the cone Martens funnel 303 cannot enter the mud receiving unit, thereby avoiding affecting the measurement results; Step e, the sliding box 502 can move horizontally, and the flushing range is required to cover the mud automatic collection unit, the cone Marsh funnel unit, and the mud receiving unit; Step f: The control unit 7 is electrically connected to the above-mentioned electrical components, and the data collection, data transmission and motion control functions are good.

[0028] The device for measuring the density and Marsh funnel viscosity of shield mud can accurately measure the time taken to receive 946ML of mud and obtain the Marsh funnel viscosity with the help of the electromagnetic valve, the photoelectric sensor 406 and the Marsh funnel; in addition, the mass of 946ML of mud can be obtained and its density value can be calculated with the help of the weighing sensor 404, and the data can be uploaded to the cloud platform in real time through the interface of the control unit 7, so as to realize the measurement of the density and Marsh funnel viscosity of shield mud. The above-mentioned density and viscosity parameters can be accurately and regularly obtained through the automated measuring device, thereby improving the scientific nature of the parameter regulation of shield construction and providing data perception conditions for the intelligentization of the mud-water circulation system.

[0029] The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A device for measuring shield mud density and Marsh funnel viscosity, characterized by: It includes a water circulation temperature control unit, a mud automatic collection unit, a cone-shaped Marsh funnel unit, a mud receiving unit, a cleaning and drying unit, a basic frame unit (6) and a control unit (7); The water circulation temperature control unit is connected to the mud automatic collection unit through a water circulation pipeline, the mud is collected by the mud automatic collection unit, flows to the mud receiving unit through the cone Marsh funnel unit, completes the mud Marsh funnel viscosity measurement, calculates the mud density based on the data collected by the weighing sensor (404) of the mud receiving unit, and uses the cleaning and drying unit to clean and dry the above-mentioned mud automatic collection unit, the cone Marsh funnel unit and the mud receiving unit; The water circulation temperature control unit, the mud automatic collection unit, the cone Marsh funnel unit, the mud receiving unit, and the cleaning and drying unit are all electrically connected to the control unit (7); The water circulation temperature control unit, the mud automatic collection unit, the cone Marsh funnel unit, the mud receiving unit, the cleaning and drying unit, and the control unit (7) are all installed on the basic frame unit (6).

2. The device for measuring the density and Marsh funnel viscosity of shield slurry according to claim 1, characterized in that: The water circulation temperature control unit comprises a water inlet pipeline (101), a water inlet switch solenoid valve (102), a water tank (103), a stirring actuator (104), a refrigerator (105), a heater (106), a drainage pipeline (107), a first temperature sensor (108), a water outlet switch solenoid valve (109), a circulating water outlet pipe (110), a water outlet pump (112), a circulating water inlet pipe (111) and a water inlet pump (113); a stirring actuator (104) for stirring water to ensure uniform temperature is installed on the top of the water tank (103); the stirring actuator (104) comprises a motor and a propeller extending to the bottom of the water tank (103); a refrigerator (105) and a heater (106) are fixedly installed on the side of the water tank (103); and the water tank (103) is provided with a stirring actuator (104) for stirring water to ensure uniform temperature. ) is provided with a first temperature sensor (108) inside, and a water inlet pipeline (101), a water outlet pipeline, a circulating water outlet pipe (110) and a circulating water inlet pipe (111) are sealed and installed on the water tank (103); a water inlet switch solenoid valve (102) and a water outlet switch solenoid valve (109) are provided on the water inlet pipeline (101) and the water outlet pipeline respectively, and a water outlet pump (112) and a water inlet pump (113) are provided on the circulating water outlet pipe (110) and the circulating water inlet pipe (111) respectively; the water inlet switch solenoid valve (102), the stirring actuator (104), the refrigerator (105), the heater (106), the first temperature sensor (108), the water outlet switch solenoid valve (109), the water outlet pump (112) and the water inlet pump (113) are all electrically connected to the control unit (7) and are controlled by it.

3. The device for measuring the density and Marsh funnel viscosity of shield slurry according to claim 2, characterized in that: The automatic mud collection unit comprises a first stainless steel container (201), a mud transport solenoid valve (202), a mud transport pipeline (203), a second temperature sensor (204), a rack guide rail (205), a gear (206) and a lifting motor (207); the first stainless steel container (201) is a double-layer stainless steel shell structure, the inner layer is a mud sampling container, the upper part of which has holes for filtering mud, and the inner layer of the first stainless steel container (201) is provided with a temperature sensor. A circulation pipeline is arranged in the interlayer of the shell of the first stainless steel container (201), and two ends of the circulation pipeline extend out of the side of the first stainless steel container (201) and are respectively sealed and connected to the circulation water outlet pipe (110) and the circulation water inlet pipe (111). A mud transfer pipeline (203) is arranged on the bottom surface of the interior of the first stainless steel container (201), and the mud transfer pipeline (203) extends out of the side of the first stainless steel container (201). A mud transfer solenoid valve (202) is arranged on the mud transfer pipeline (203). The first stainless steel container (201) 01) A rack is fixedly mounted on the side, a rack guide rail (205) is mounted on the basic frame unit (6) at a position corresponding to the rack, the rack can move up and down on the rack guide rail (205), a lifting motor (207) is fixedly mounted on the upper end of the rack guide rail (205), a gear (206) is fixedly mounted on the output end of the lifting motor (207), and the gear (206) is meshed with the rack; the mud transport solenoid valve (202), the second temperature sensor (204), and the stepper motor are electrically connected to and controlled by the control unit (7).

4. The device for measuring the density and Marsh funnel viscosity of shield slurry according to claim 3, characterized in that: The conical Martens funnel unit comprises a first rack slide rail (301), a movable workbench (302), a conical Martens funnel (303) and a mud discharge electromagnetic valve (304); a rack is arranged on the upper surface of the first rack slide rail (301); the movable workbench (302) is clamped on the first rack slide rail (301) and moves; the movable workbench (302) has a built-in stepping motor and a gear (206); the gear (206) is fixedly mounted on the output end of the stepping motor; the gear (206) is connected to the first rack slide rail (301) and the first rack slide rail (301) and the movable workbench (302) is connected to ... and the movable workbench (302) is connected to the first rack slide rail (301) and the movable workbench (302) and the movable workbench (302) and the movable workbench (302) and the movable workbench (302) and the movable workbench (302) and the movable workbench (302) and the movable workbench (302) and the movable workbench (302) and the movable workbench (302) and the movable workbench (302) and the movable workbench (302) and the movable workbench (302) The racks on the rack slide rail (301) are meshed with each other, a conical Martens funnel (303) is installed on the upper part of the movable workbench (302), a mud discharge solenoid valve (304) is installed at the bottom of the conical Martens funnel (303), and an end of the mud transfer pipeline (203) away from the first stainless steel container (201) is arranged as a 90° elbow facing the axial direction of the conical Martens funnel (303), and the movable workbench (302) and the mud discharge solenoid valve (304) are electrically connected to and controlled by the control unit (7).

5. The device for measuring the density and Marsh funnel viscosity of shield slurry according to claim 1, characterized in that: The mud receiving unit comprises a moving motor (401), a ball screw pair (402), a moving guide rail (403), a weighing sensor (404), a second stainless steel container (405) and a photoelectric sensor (406); the moving motor (401) is mounted on a basic frame unit (6); the output end of the moving motor (401) is connected to the moving guide rail (403) via a ball screw pair; the weighing sensor (404) is fixedly mounted on the moving guide rail (403); the weighing sensor (404) is provided with a second stainless steel container (405); a valve for discharging mud is provided at the bottom of the second stainless steel container (405); and the second stainless steel container (405) is installed with a photoelectric sensor (406); the stepping motor, the weighing sensor (404) and the photoelectric sensor (406) are respectively electrically connected to and controlled by a control unit (7).

6. The device for measuring the density and Marsh funnel viscosity of shield slurry according to claim 1, characterized in that: The cleaning and drying unit comprises a second rack rail (501), a sliding box (502), an electric cylinder (503), a support rod (504) and a blower (505); the second rack rail (501) is mounted on the basic frame unit (6); the sliding box (502) is clamped on the second rack rail (501) and moves; the sliding box (502) has a built-in stepping motor and a gear (206); the gear (206) is fixedly mounted on the output end of the stepping motor; the gear (206) is meshed with the rack on the second rack rail (501); the upper end of the sliding box (502) is fixedly mounted with an electric cylinder (503); the upper end of the electric cylinder (503) is fixedly mounted with a support rod (504); the upper end of the support rod (504) is fixedly mounted with a blower (505) and a nozzle; the nozzle is connected to an external water supply system; the electric cylinder (503) and the blower (505) are respectively electrically connected to a control unit (7) and controlled by it.

7. The device for measuring the density and Marsh funnel viscosity of shield slurry according to claim 1, characterized in that: The basic frame unit (6) is made of stainless steel.

8. The device for measuring the density and Marsh funnel viscosity of shield slurry according to claim 1, characterized in that: The control unit (7) may be a PLC, a single-chip microcomputer or a computer; the control unit (7) is provided with a data interface for receiving instructions and transmitting data.

9. A method for using a device for measuring shield slurry density and Marsh funnel viscosity, characterized in that: The device for measuring the density and Marsh funnel viscosity of shield slurry according to any one of claims 1 to 8 is characterized in that it comprises the following steps: Step S1: assembling a water circulation temperature control unit, a mud automatic collection unit, a cone Marsh funnel unit, a mud receiving unit, a cleaning and drying unit and a control unit (7); Step S2: the control unit (7) controls the automatic mud collection unit to move downward to collect mud. After staying at the lowest position for a set time according to the program design, the automatic mud collection unit moves upward to the upper limit position to complete the mud collection work; Step S3: the control unit (7) collects the temperature in the mud automatic collection unit. If the temperature is within the set temperature range, no temperature adjustment is required. If the temperature is out of the range, the control unit (7) opens the water inlet switch solenoid valve (102) and closes the water outlet switch solenoid valve (109), collects the temperature of the first temperature sensor (108), starts the water outlet pump (112) and the water inlet pump (113), and at the same time, according to the comparison between the temperature of the first temperature sensor (108) and the required temperature range of the mud, selects to start the refrigerator (105) or the heater (106); Step S4: After the mud in the first stainless steel container (201) is adjusted to a set temperature range, the movable workbench (302) is moved to the left limit position, the moving guide rail (403) is moved to the right limit position, the mud discharge solenoid valve (304) is closed, and the mud transfer solenoid valve (202) is opened, and the mud flows into the conical Martens funnel (303). During the process, the opening of the mud transfer solenoid valve (202) is first large and then small, to ensure that 1500 ml of mud is injected into the conical Martens funnel (303); Step S5: The cone-shaped Marsh funnel (303) is filled with mud. After 10 to 15 seconds, the motion guide rail (403) moves to the left limit position to remain stable. The weighing sensor (404) starts weighing. The mud discharge electromagnetic valve (304) is opened to start timing. The timing is stopped after the light signal of the photoelectric sensor (406) is interrupted. The weighing sensor (404) starts weighing again. The control unit (7) calculates the time interval of the timing as the Marsh funnel viscosity. The time difference between the two weighings of the weighing sensor (404) is divided by the received mud volume 945ML to obtain the mud density. The control unit (7) sends the data to the designated IP location or device. Step S6: Open the mud transfer solenoid valve (202), the mud discharge solenoid valve (304) and the valve of the second stainless steel container (405), and move the sliding box (502) to spray water from the right to the left to wash the mud; after washing, open the support rod (504) to lower the position of the blower (505), turn on the blower (505) for drying, and then close all valves and equipment.

10. The method for using the device for measuring the density and Marsh funnel viscosity of shield slurry according to claim 9, characterized in that: The step S1 specifically includes the following steps: Step a, a water circulation temperature control unit, wherein the water inlet pipe (101) is connected to an external water supply system, the drainage pipe (107) is installed away from the water tank (103) at one end thereof and toward the mud pool for direct drainage, and the first temperature sensor (108) is installed so as to avoid interference with the stirring actuator (104) to damage the first temperature sensor (108); the circulation outlet pipe (110) and the circulation inlet pipe (111) are both flexible pipes; Step b, the circulating water inlet pipe (111) and the circulating water outlet pipe (110) are respectively connected to the circulating pipeline in the interlayer of the shell of the first stainless steel container (201), and the basic frame unit (6) is arranged to avoid the position of the automatic mud collection unit, so as to ensure that the automatic mud collection unit can move freely up and down without interfering with other structural parts under the drive of the lifting motor (207), and the automatic mud collection unit is arranged directly above the mud pool, and can allow the first stainless steel container (201) to collect enough mud; Step c: After the cone-shaped Martens funnel unit is assembled, it can slide on the track and slide to the extreme position close to the automatic mud collection unit so that the mud discharged from the mud transfer pipeline (203) can enter the cone-shaped Martens funnel (303); Step d, the mud receiving unit is located below the conical Martens funnel unit, and when the moving motor (401) drives the moving guide rail (403) to move to the left limit position, the lower end of the conical Martens funnel (303) coincides with the test range of the photoelectric sensor (406), and the weighing sensor (404) moves to the left limit to ensure that the mud overflowing from the conical Martens funnel (303) cannot enter the mud receiving unit, thereby avoiding affecting the measurement result; Step e, the sliding box (502) can move horizontally, and the flushing range is required to cover the mud automatic collection unit, the cone Marsh funnel unit, and the mud receiving unit; Step f: The control unit (7) is electrically connected to the above-mentioned electrical components, and the data collection, data transmission and motion control functions are good.

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