Slurry balance pipe jacking construction dry mass analysis device and analysis method

Abstract

The invention discloses a dry mass analysis device and method for slurry balance pipe jacking construction, and belongs to the technical field of slurry balance pipe jacking construction. The device comprises a slurry circulating system and an integrated slurry leading-out, separating, discharging, monitoring and control unit, the separation unit realizes separation of slurry and dry matter through a centrifugal separation part, the discharging unit screens a target dry matter and conveys the target dry matter to the slurry circulating system, the slurry circulating system mixes the target dry matter with purified slurry, and after the density difference between the mixed slurry and the input slurry is controlled to be smaller than 5%, the mixed slurry is cyclically reused; the monitoring unit collects dry matter parameters in real time, and the control unit achieves automatic discharging and construction risk early warning according to the dry matter parameters. The dry matter monitoring precision and the discharging automation level are improved, resource recycling and reuse are achieved, the construction cost is reduced, the construction safety is guaranteed, and the method is suitable for pipe jacking construction of various underground pipelines.

Description

Technical Field

[0001] This invention relates to the field of slurry balance pipe jacking construction technology, specifically to a dry matter analysis device for slurry balance pipe jacking construction and a dry matter analysis method using the device. Background Technology

[0002] Slurry-balanced pipe jacking is a commonly used underground pipeline laying technology. Its core principle is to introduce slurry into the working chamber of the pipe jacking machine through a slurry circulation system, establishing a stable balance pressure to resist ground pressure and prevent soil collapse in front of the machine. Simultaneously, the slurry carries away dry materials (such as sand and gravel) generated during cutting by the pipe jacking machine from the construction area. During construction, the composition, content, and particle size of the dry materials directly affect construction safety and quality: excessive accumulation of dry materials in the working chamber can lead to poor slurry circulation, imbalanced pressure, and the risk of collapse; untimely or uncontrolled discharge of dry materials can affect tunneling efficiency and result in low recycling efficiency and resource waste. Furthermore, accurate data on the dry materials during construction is crucial for guiding the selection of subsequent backfill materials and the determination of backfill volume.

[0003] In existing technologies, dry matter treatment in slurry-balanced pipe jacking construction often employs simple separation and discharge structures, lacking precise monitoring of dry matter composition parameters and failing to automatically control the discharge process based on dry matter accumulation. Furthermore, the separated dry matter is often directly discarded without targeted recycling and reuse, leading to excessive consumption of slurry materials. In addition, existing technologies cannot provide construction risk warnings based on dry matter data, making it difficult to proactively avoid problems such as collapses or exceeding tunneling speed limits. Therefore, there is an urgent need for a dry matter analysis device and method capable of precise dry matter monitoring, automatic discharge control, dry matter recycling and reuse, and construction risk warning to address the shortcomings of existing technologies. Summary of the Invention

[0004] To address the technical shortcomings of existing slurry balance pipe jacking construction, such as inaccurate dry matter monitoring, low automation of material discharge control, low dry matter recycling rate, and lack of construction risk early warning mechanism, the present invention aims to provide a dry matter analysis device and method for slurry balance pipe jacking construction. This device and method enable real-time and accurate monitoring of dry matter composition parameters, automatic control of the material discharge process, targeted recycling and reuse of dry matter, and construction risk early warning based on dry matter data, thereby ensuring construction safety and efficiency.

[0005] First aspect This invention provides a dry matter analysis device for slurry-water balance pipe jacking construction, including a slurry circulation system for inputting slurry into the pipe jacking head to establish the necessary pressure in the working chamber of the pipe jacking head; the slurry-water balance pipe jacking construction dry matter analysis device also includes a slurry discharge unit, a separation unit, a discharge unit, a monitoring unit, and a control unit.

[0006] Mud discharge unit: used to discharge mud carrying dry materials during construction to the separation unit; its input end is connected to the working chamber of the pipe jacking machine head in mud-water balance pipe jacking construction, and the output end of the mud discharge unit is connected to the feed port of the separation unit to ensure that the mud carrying dry materials in the working chamber can be smoothly discharged to the subsequent separation structure.

[0007] Separation unit: Used to receive the mud exported by the mud export unit and separate the imported mud into liquid components and dry components; the separation unit includes a centrifugal separation section, which is used to continuously separate the mud imported into the separation unit, and achieve efficient separation of liquid and dry matter through centrifugal force, ensuring the continuity of the separation process and avoiding affecting the overall construction progress.

[0008] Discharge unit: Used to discharge the dry components separated by the separation unit.

[0009] Monitoring unit: Used to monitor the dry matter composition parameters in the separation unit and the discharge unit.

[0010] Control unit: Electrically connected to the monitoring unit and the discharge unit respectively, used to receive the dry matter composition parameters output by the monitoring unit. When the dry matter composition parameters of the separation unit reach the preset threshold, the control unit controls the discharge unit to open and discharge the dry matter in the separation unit. At the same time, the control unit is also used to determine whether to output collapse or tunneling speed over-limit alarm information based on the dry matter composition parameters of the discharge unit.

[0011] Furthermore, the discharge unit also includes a partition plate. The partition plate can switch between a separating position and a connecting position. When in the separating position, it isolates the liquid and dry components in the separation unit, preventing impurities from being discharged due to mixing of liquid and dry matter during the discharge process. When in the connecting position, the liquid and dry components in the separation unit are interconnected, ensuring the normal operation of the separation process.

[0012] Furthermore, the discharge unit also includes a screening section, which is used to screen the dry matter components separated by the centrifugal separation section and transport the dry matter that conforms to the preset particle size range to the mud circulation system. The screening section includes a vibrator and a screening structure. The screening structure has screening holes corresponding to the preset particle size range. Under the vibration of the vibrator, the dry matter is efficiently screened to screen out the target dry matter components that are smaller than the preset particle size range.

[0013] Furthermore, the discharge unit also includes a discharge valve and a drive component. The drive component is electrically connected to the control unit and is used to drive the opening and closing of the discharge valve. The discharge valve can be a solenoid valve or a pneumatic valve to ensure rapid response and stable control of the discharge process.

[0014] Furthermore, the monitoring unit includes force sensors, and multiple force sensors are installed on the outer periphery of the centrifugal separation section and spaced apart along the height direction of the centrifugal separation section. They are used to monitor the centrifugal force on the dry components in the separation unit and then calculate the dry volume in the separation unit.

[0015] Furthermore, the monitoring unit includes a weight sensor and / or a volume sensor. The weight sensor is used to periodically measure the remaining dry matter mass, which is the dry matter mass remaining after the mud circulation system receives the target dry matter at a preset dosage, calculated from the dry matter discharged by the discharge unit. The volume sensor is used to periodically measure the remaining dry matter volume, which is the dry matter volume remaining after the mud circulation system receives the target dry matter at a preset dosage, calculated from the dry matter discharged by the discharge unit.

[0016] Furthermore, the mud circulation system is connected to the discharge unit and the separation unit to receive the liquid components separated by the separation unit and further receive a portion of the dry components discharged by the discharge unit. The mud circulation system receives the target dry components according to a preset dosage and mixes the received target dry components with the liquid components separated by the separation unit, so that the density difference between the mixed mud and the input mud is less than 5%. The mixed mud is then reintroduced into the pipe jacking head as input mud to continue working, realizing the recycling of mud and reducing material consumption.

[0017] Second aspect This invention provides a method for dry matter analysis in slurry balance pipe jacking construction, applied to any of the slurry balance pipe jacking construction dry matter analysis devices described in the first aspect, comprising the following steps: S1: Mud input and dry material cutting: Control the mud circulation system to input mud into the pipe jacking head at a preset flow rate, and control the pipe jacking head to cut dry material to obtain mud carrying the cut dry material; the preset flow rate can be preset according to the geological conditions, pipe diameter and other parameters to ensure that a stable balanced pressure can be established in the working chamber.

[0018] S2: Mud separation: The separation unit receives the mud carrying the dry matter from the mud export unit and continuously separates the imported mud into liquid and dry components through a centrifugal separator; the rotation speed of the centrifugal separator can be adjusted according to parameters such as mud concentration and dry particle size to ensure separation efficiency.

[0019] S3: Dry matter discharge control: When the monitoring unit detects that the dry matter component parameters in the separation unit meet the preset threshold, the discharge unit controls the discharge unit to discharge the dry matter separated by the separation unit.

[0020] S4: Dry quality parameter monitoring and construction data acquisition: The dry quality component parameters discharged from the material discharge unit are measured by the monitoring unit to obtain construction dry quality data.

[0021] Furthermore, when the monitoring unit detects that the dry matter component parameters in the separation unit meet the preset threshold, the discharge unit is controlled to discharge the dry matter separated by the separation unit; specifically, this includes the following sub-steps: S31: Threshold judgment: The dry matter volume in the separation unit is obtained by multiple force sensors of the monitoring unit. When the dry matter volume is greater than or equal to the preset volume threshold, the control unit sends a discharge command to the discharge unit. The preset volume threshold can be set according to parameters such as the volume of the separation unit and the construction progress requirements. It is usually set to 80%-90% of the effective volume of the separation unit to avoid excessive accumulation of dry matter affecting the separation effect. S32: Separation and Discharge: Control the separator plate of the discharge unit to switch to the separation position to isolate the liquid component and dry component in the separation unit. Then control the drive unit to drive the discharge valve to open and discharge the dry component in the separation unit to the discharge unit. S33: Continuous Separation: During the discharge of dry components from the discharge unit, the separation unit continues to receive the slurry carrying the dry matter from the slurry discharge unit, and continuously separates the introduced slurry into liquid and dry components to ensure the continuity of the construction process.

[0022] Furthermore, the dry matter composition parameters discharged from the discharge unit are measured by the monitoring unit to obtain construction dry matter data; specifically, this includes the following sub-steps: S41: Dry material screening and recovery: The screening section of the control discharge unit screens the discharged dry material components and transports some of the screened target dry materials to the mud circulation system.

[0023] S42: Measurement of Remaining Dry Matter Parameters: The weight sensor and / or volume sensor of the control monitoring unit perform parameter analysis on the remaining dry matter after the target dry matter component is delivered, and obtain the mass and / or volume of the remaining dry matter.

[0024] S43: Determination of construction dry matter data: Based on the mass and / or volume of the remaining dry matter, determine the construction dry matter data for the current material discharge cycle; wherein, the current material discharge cycle is defined as the time starting point when the dry matter components separated by the separation unit are discharged in the previous material discharge unit, and the time ending point when the dry matter components separated by the separation unit are discharged in the current material discharge unit; the construction dry matter data is used to determine the type and volume of backfill material. For example, if the dry matter is mainly sand and has a large content, sand can be selected as the main backfill material, and the backfill volume is calculated based on the total amount of dry matter discharged.

[0025] Furthermore, dry matter screening and recovery: The screening section of the discharge unit screens the discharged dry matter components and transports a portion of the screened target dry matter components to the mud circulation system; specifically including: S411: Parameter acquisition: Acquire the amount of input mud and dry matter type of the preset flow rate, wherein the dry matter type is related to the particle size range of the dry matter; S412: Target dry matter screening: Control the operation of the vibrator in the screening section to screen out dry matter components that meet the particle size range corresponding to the dry matter type through the screening holes of the screening structure, and use them as target dry matter components. S413: Quantitative recovery: Based on the preset flow rate input of the mud usage, the system delivers an equal amount of the target dry matter components within the current discharge cycle to the mud circulation system to ensure that the density of the mixed mud meets the requirements.

[0026] Optionally, the dry matter analysis method for slurry balance pipe jacking construction may also include: S5: Construction Risk Assessment: Determine whether the dry matter data of the current material discharge cycle is greater than the preset construction threshold; the preset construction threshold can be set in advance based on parameters such as the stability of the construction stratum and the pipe jacking construction specifications, reflecting the allowable loss of the stratum soil.

[0027] S6: Risk Warning: If the dry material data of the construction in the current material discharge cycle is greater than the preset construction threshold, the control unit will output an alarm message for collapse or over-limit tunneling speed. The staff can adjust the construction parameters such as tunneling speed and mud flow in a timely manner according to the alarm message, or take measures such as reinforcing the strata to avoid construction risks.

[0028] Compared with existing technologies, this invention enables precise monitoring of dry matter composition parameters: by setting multiple spaced force sensors on the outer periphery of the centrifugal separation section, the dry matter volume can be accurately monitored; combined with weight sensors and / or volume sensors, parameters such as the dry matter mass and volume of the discharge unit can be comprehensively acquired, providing accurate data support for construction analysis. It also improves the automation level of discharge control: the control unit automatically controls the opening and closing of the discharge unit based on the dry matter parameters of the monitoring unit, and combined with the switching control of the partition plates, achieves precise and efficient discharge of dry matter without manual intervention, improving construction efficiency and reducing human error. Attached Figure Description

[0029] The preferred embodiments will now be described in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of the present invention.

[0030] Figure 1 This is an overall schematic diagram of the dry matter analysis device for slurry-water balance pipe jacking construction in an embodiment of the present invention; Figure 2This is a schematic diagram of the centrifuge unit state at the conduction position of the dry matter analysis device for slurry-water balance pipe jacking construction in an embodiment of the present invention; Figure 3 This is a schematic diagram of the centrifuge unit status at the separation position of the dry matter analysis device for slurry-water balance pipe jacking construction in an embodiment of the present invention; Figure 4 This is a schematic diagram of the centrifuge unit status during the discharge process of the dry matter analysis device for slurry-water balance pipe jacking construction in an embodiment of the present invention; Figure 5 This is a schematic diagram of the screening section of the dry matter analysis device for slurry-water balance pipe jacking construction in an embodiment of the present invention; Figure 6 This is a schematic diagram of a dry matter analysis method for slurry-water balance pipe jacking construction in an embodiment of the present invention; Detailed Implementation

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0032] To keep the drawings concise, each figure only schematically shows the parts relevant to the invention, and these do not represent the actual structure of the product. Furthermore, to facilitate understanding, in some figures, only one of components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0033] It should also be understood that the term “and / or” as used in this specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0034] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections. They can refer to mechanical connections or electrical connections. They can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] Furthermore, in the description of this invention, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0036] Example 1

[0037] In one embodiment, refer to the appendix to the specification. Figure 1-2 The present invention provides a dry quality analysis device for slurry-water balance pipe jacking construction, including a slurry circulation system, which is used to input slurry into the pipe jacking head to establish the necessary pressure in the working chamber 11 of the pipe jacking head; the dry quality analysis device for slurry-water balance pipe jacking construction also includes a slurry discharge unit 12, a separation unit 20, a discharge unit 30, a monitoring unit 40 and a control unit 50.

[0038] Mud discharge unit 12: used to discharge mud carrying dry materials during construction to separation unit 20; its input end is connected to the working chamber 11 of the jacking machine head in mud-water balance jacking construction, and the output end of mud discharge unit 12 is connected to the feed port of separation unit 20 to ensure that the mud carrying dry materials in the working chamber can be smoothly discharged to the subsequent separation structure.

[0039] Separation unit 20: Used to receive the mud discharged by the mud discharge unit 12 and separate the imported mud into liquid component 23 and dry component 22; the separation unit 20 includes a centrifugal separation section 21, which is used to continuously separate the mud imported into the separation unit 20, and achieve efficient separation of liquid and dry matter through centrifugal force, ensuring the continuity of the separation process and avoiding affecting the overall construction progress.

[0040] Discharge unit 30: Used to discharge the dry components 22 separated by the separation unit 20.

[0041] Monitoring unit 40: Used to monitor the dry matter component 22 parameter in the separation unit 20 and the discharge unit 30.

[0042] Control unit 50: Electrically connected to monitoring unit 40 and discharge unit 30 respectively, used to receive the dry component 22 parameter output by monitoring unit 40. When the dry component 22 parameter of separation unit 20 reaches a preset threshold, control discharge unit 30 to open and discharge the dry component 22 in separation unit 20. At the same time, control unit 50 is also used to determine whether to output collapse or tunneling speed over-limit alarm information based on the dry component 22 parameter of discharge unit 30.

[0043] In some embodiments, the input end of the mud discharge unit 12 is connected to the working chamber 11 of the pipe jacking machine head in mud-water balance pipe jacking construction, and the output end of the mud discharge unit 12 is connected to the feed inlet of the separation unit 20. The separation unit 20 includes a centrifugal separation section 21, which is used to continuously separate the mud introduced into the separation unit 20. Understandably, the separation unit 20 can receive the waste mud carrying dry matter discharged by the mud discharge unit 12, and accurately separate the introduced mud into liquid component 23 (i.e., purified mud) and dry component 22 (i.e., solid particles generated during cutting) through a specific separation mechanism.

[0044] Specifically, the separation unit 20 is equipped with a centrifugal separation section 21. By rotating and centrifuging the mud, the mud can be separated into a liquid component 23 in the middle and a dry component 22 on the outer periphery under the action of centrifugal force. The advantage of rotational centrifugal separation is that it can continuously separate the mud introduced into the separation unit 20. Utilizing the density difference between the dry particles and the mud liquid, the dry particles quickly settle to the bottom of the separation chamber, while the purified mud liquid flows out along the upper discharge channel of the separation chamber. Compared with the traditional sedimentation separation method, this centrifugal separation method has advantages such as high separation efficiency, good separation effect, and small footprint. It can ensure that the separation process is carried out simultaneously with the pipe jacking process, avoiding the impact on the overall construction progress due to untimely separation.

[0045] In some embodiments, the discharge unit 30 further includes a partition plate 31. The partition plate 31 can switch between a partition position and a conductive position. When in the partition position, it isolates the liquid component 23 and the dry component 22 in the separation unit 20 to prevent the liquid and dry component from mixing during the discharge process, thus avoiding impurities in the discharge. When in the conductive position, the liquid component 23 and the dry component 22 in the separation unit 20 are interconnected, ensuring the normal operation of the separation process.

[0046] Specifically, the separator 31 adopts a switchable structural design, which can flexibly switch between a separating position and a conducting position. Its switching action is precisely controlled by the control unit 50. When the separator 31 is in the separating position, it can isolate the liquid component 23 and the dry component 22 in the separation unit 20, effectively preventing the liquid and dry component from remixing during the discharge process, ensuring the purity of the discharged dry component, and preventing the liquid component 23 from being discharged with the dry component, thus avoiding resource waste. When the separator 31 is in the conducting position, the liquid component 23 and the dry component 22 in the separation unit 20 can communicate with each other, ensuring that the normal separation process of the separation unit 20 is not affected. In some embodiments, such as Figure 6As shown, the separator 31 is generally in the shape of an inverted cone barrel. The separator 31 is driven by a push rod to move in the direction of gravity within the separation unit 20. When the dry component 22 separated by the centrifugal separation section 21 in the separation unit 20 accumulates to a certain extent, the monitoring unit 40 can be triggered to output a discharge signal. At this time, the dry component 22 is generally piled up in a cone shape at the bottom of the outer periphery of the centrifugal separation section 21. The separator 31, which is in the shape of an inverted cone barrel, can match the piled-up dry component 22. When the separator 31 is driven to the separation position, the separator 31 is in close contact with the outer periphery of the centrifugal separation section 21 and the bottom of the separation unit 20, thereby isolating the liquid component 23 and the dry component 22 in the separation unit 20. When the discharge unit 30 works to discharge the dry component, the liquid component 23 in the separation unit 20 will not leak out.

[0047] In some embodiments, the discharge unit 30 further includes a screening section 32, which is used to screen the dry matter components 22 separated by the centrifugal separation section 21 and transport the dry matter that conforms to the preset particle size range to the mud circulation system. The screening section 32 includes a vibrator 321 and a screening structure 322. The screening structure 322 has screening holes corresponding to the preset particle size range. Under the vibration of the vibrator 321, the dry matter is efficiently screened to screen out the target dry matter components 22 that are smaller than the preset particle size range.

[0048] Specifically, the dry components 22 separated by the centrifugal separation section 21 are precisely screened by the screening section 32 to select dry components 22 that meet the preset particle size range and transport them to the mud circulation system for recycling and reuse. To improve screening efficiency and accuracy, the screening section 32 is equipped with a vibrator 321 and a screening structure 322. The screening structure 322 is provided with screening holes that match the preset particle size range. Under the high-frequency vibration of the vibrator 321, the dry components 22 tumble rapidly on the screening structure 322. Dry particles smaller than the preset particle size range can pass smoothly through the screening holes and become the target dry components 22, while dry particles larger than the preset particle size range are intercepted and discharged, realizing the classification treatment of the dry components 22. In some embodiments, the preset particle size range matches the particle size range of the slurry input into the pipe jacking head by the slurry circulation system, thereby enabling at least a portion of the original input slurry to be recycled and reused. The inventors have found through experiments that using dry matter component 22 in the cutting dry matter that has a similar particle size range to the original input slurry as the input slurry for reuse yields similar construction results. By reusing the cutting dry matter, the amount of original input slurry (e.g., bentonite mixture) can be saved.

[0049] In some embodiments, the mud circulation system is connected to the discharge unit 30 and the separation unit 20 to receive the liquid component 23 separated by the separation unit 20, and further receive a portion of the dry component 22 discharged by the discharge unit 30; the mud circulation system receives the target dry component 22 according to a preset dosage, and mixes the received target dry component 22 with the liquid component 23 separated by the separation unit 20, so that the density difference between the mixed mud and the input mud is less than 5%, and the mixed mud is re-inputted into the pipe jacking head as input mud to continue working, thereby realizing the recycling of mud and reducing material consumption.

[0050] Specifically, the mud circulation system receives the purified liquid component 23 separated by the separation unit 20 on the one hand, and further receives a portion of the dry component 22 that meets the requirements discharged by the discharge unit 30 on the other hand, thereby realizing the reuse and control of the mud. By collecting and feeding back the delivery flow rate of the target dry component 22, the system completes the reception of the target dry component 22 according to the preset dosage (which is dynamically calculated by the control unit 50 based on the real-time consumption rate of the current input mud, the dry particle size distribution, and the mud performance parameters), avoiding deviations in the performance of the mixed mud due to excessive or insufficient dry matter. Specifically, the system collects the density of the mud after mixing the target dry component 22 with the liquid component 23 separated by the separation unit 20. The control unit 50 compares the density of the mixed mud with the density value of the initial input mud. If the density difference is ≥5%, the dynamic adjustment mechanism is activated. When the density of the mixed mud is too high, the dosage of the mixed liquid component 23 is increased; when the density of the mixed mud is too high, the dosage of the target dry component 22 is increased. Finally, the mud circulation system pressurizes the mixed mud that meets performance requirements using a variable frequency mud pump, and then re-inputs it through a pipeline as new input mud into the mud distributor at the pipe jacking head. This mud is then evenly injected into the sealed working chamber to continue participating in pressure balancing and dry matter carrying, achieving closed-loop circulation and reuse of the mud, significantly reducing the consumption cost of mud materials. Furthermore, by reusing the cutting fluid, the dry matter mass and / or dry matter volume obtained by the monitoring unit in the discharge unit 30 are close to the actual cutting fluid mass, greatly simplifying calculations and improving analysis accuracy. This also enables the periodic acquisition of construction dry matter data during continuous operation to determine the type and volume of backfill material.

[0051] In some embodiments, the discharge unit 30 further includes a discharge valve and a drive component. The drive component is electrically connected to the control unit 50 and is used to drive the discharge valve to open and close. The discharge valve may be a solenoid valve or a pneumatic valve to ensure rapid response and stable control of the discharge process.

[0052] Specifically, by coordinating the work of the separator 31, the drive unit, and the discharge valve, a rapid response and stable and reliable control of the discharge process can be ensured. This enables the periodic discharge of the dry components 22 deposited in the separation unit 20.

[0053] In some embodiments, the monitoring unit 40 includes multiple force sensors 41, which are installed on the outer periphery of the centrifugal separation section 21 and spaced apart along the height direction of the centrifugal separation section 21. These force sensors monitor the centrifugal force exerted on the dry component 22 in the separation unit 20, thereby calculating the dry volume in the separation unit 20. To accurately measure the volume of the dry component 22, multiple force sensors 41 are used, all installed on the outer periphery of the centrifugal separation section 21 and spaced apart at preset intervals along the height direction of the centrifugal separation section 21. This multi-point, multi-height monitoring layout comprehensively captures changes in centrifugal force generated by the distribution of dry particles within the centrifugal separation section 21. The working principle of this sensor is to monitor the centrifugal force generated by the dry component 22 on the inner wall of the centrifugal separation section 21 during centrifugal rotation, and combine this with a previously calibrated correspondence model between centrifugal force and dry volume to calculate the dry volume in the separation unit 20, providing core data support for determining the discharge timing. It is understood that the separation unit 20 can be a rotating body configuration, which facilitates the slurry to rotate along the outer periphery of the centrifugal separation section 21 of the separation unit 20. By setting a stirring component at the bottom of the centrifugal separation section 21, or by setting the slurry entering the separation unit 20 to enter in the tangential direction along the outer periphery of the centrifugal separation section 21, the slurry in the centrifugal separation section 21 can rotate, thereby separating the liquid component 23 and the dry component 22 in the slurry by centrifugal force.

[0054] In some embodiments, the monitoring unit 40 includes a weight sensor 42 and / or a volume sensor 43. The weight sensor 42 is used to periodically measure the remaining dry matter mass, which is the mass of the dry matter 22 discharged by the discharge unit 30 minus the mass of the target dry matter 22 received by the mud circulation system according to a preset dosage. The volume sensor 43 is used to periodically measure the remaining dry matter volume, which is the volume of the dry matter 22 discharged by the discharge unit 30 minus the volume of the target dry matter 22 received by the mud circulation system according to a preset dosage.

[0055] Specifically, the weight sensor 42 and / or volume sensor 43 are used to periodically measure the remaining dry mass or volume within the discharge unit 30. The remaining dry mass is defined as: the total mass of dry components 22 discharged from the discharge unit 30, minus the mass of the target dry components 22 received by the mud circulation system according to a preset dosage, leaving the remaining dry component 22 mass. Periodically measuring this parameter allows for accurate determination of the total dry mass generated in each discharge cycle, providing a key quality parameter for calculating construction dry mass data. The remaining dry mass volume is defined as: the total volume of dry components 22 discharged from the discharge unit 30, minus the volume of the target dry components 22 received by the mud circulation system according to a preset dosage, leaving the remaining dry component 22 volume. Periodic measurement of this parameter can corroborate the mass parameter measured by the weight sensor 42, improving the accuracy and reliability of the construction dry mass data.

[0056] A typical workflow of the slurry balance pipe jacking construction dry matter analysis device of the present invention is as follows: The control unit 50 receives various dry matter component 22 parameter data output by the monitoring unit 40, and then processes and analyzes the received data through the built-in data analysis algorithm. When the analysis finds that the dry matter component 22 parameter of the separation unit 20 reaches the preset threshold, the control unit 50 sends a corresponding control command to the discharge unit 30 to control the discharge unit 30 to start the discharge action and discharge the dry matter 22 in the separation unit 20 in a timely manner. At the same time, the control unit 50 can also determine whether there is a risk of collapse or exceeding the tunneling speed limit in the current construction process based on the dry matter component 22 parameter of the discharge unit 30 (such as the remaining dry matter mass, volume and discharge rate, etc.) and the preset construction risk assessment model, and output the corresponding alarm information in a timely manner when there is a risk.

[0057] Example 2

[0058] This invention provides a control method for actively driving heat pipes, such as... Figure 2-4 As shown, the dry matter analysis device for slurry balance pipe jacking construction described in Example 1 specifically includes the following steps: S1: Mud input and dry material cutting: Control the mud circulation system to input mud into the pipe jacking head at a preset flow rate, and control the pipe jacking head to cut dry material to obtain mud carrying the cut dry material; the preset flow rate can be preset according to the geological conditions, pipe diameter and other parameters to ensure that a stable balanced pressure can be established in the working chamber. For example, the soil parameters of the current construction stratum (sand density 1.6 g / cm³, porosity 35%, moisture content 18%), pipe diameter 1.2 m, preset tunneling speed 0.5 m / min, etc., can be input through the touch screen parameter setting interface of the control unit 50. The control unit 50 automatically calculates and sets the preset flow rate of the mud circulation system to 50 m³ / h. The control unit 50 controls the variable frequency mud pump of the mud circulation system to start, and stably inputs mud (initial mud density 1.2 g / cm³) into the pipe jacking head at a flow rate of 50 m³ / h. At the same time, it controls the cutting mechanism of the pipe jacking head to start, and cuts the sandy soil stratum ahead at a tunneling speed of 0.5 m / min. The sand particles generated by cutting are fully mixed with the input mud to form mud carrying the dry matter from the cutting. Then, the mud discharge unit 12 discharges the mud carrying the dry matter from the cutting process to the separation unit 20.

[0059] S2: Mud separation: The separation unit 20 receives the mud carrying the dry matter from the mud export unit 12, and continuously separates the imported mud into liquid component 23 and dry component 22 through the centrifugal separation unit 21; the rotation speed of the centrifugal separation unit 21 can be adjusted according to parameters such as mud concentration and dry particle size to ensure separation efficiency.

[0060] S3: Dry discharge control: When the monitoring unit 40 detects that the parameters of the dry component 22 in the separation unit 20 meet the preset threshold, the discharge unit 30 is controlled to discharge the dry component 22 separated by the separation unit 20.

[0061] S4: Dry quality parameter monitoring and construction data acquisition: The dry quality component 22 parameters discharged from the discharge unit 30 are measured by the monitoring unit 40 to obtain construction dry quality data.

[0062] In some embodiments, when the monitoring unit 40 detects that the parameter of the dry component 22 in the separation unit 20 meets a preset threshold, the discharge unit 30 is controlled to discharge the dry component 22 separated by the separation unit 20; specifically, this includes the following sub-steps: S31: Threshold Judgment: The dry matter volume in the separation unit 20 is obtained by multiple force sensors 41 of the monitoring unit 40. When the dry matter volume is greater than or equal to a preset volume threshold, the control unit 50 sends a discharge command to the discharge unit 30. The preset volume threshold can be set according to parameters such as the volume of the separation unit 20 and construction progress requirements. It is usually set to 30%-60% of the effective volume of the separation unit 20 to avoid excessive accumulation of dry matter affecting the separation effect. For example, the dry matter volume is measured in real time by four force sensors 41 installed on the outer periphery of the centrifuge drum. The centrifugal force signal is collected and transmitted to the control unit 50. The control unit 50 converts the centrifugal force signal into dry matter volume data through a built-in conversion algorithm (which establishes a correspondence model between centrifugal force and dry matter volume through prior experimental calibration: V=kF+b, where V is the dry matter volume, F is the centrifugal force, and k and b are calibration coefficients). When the dry matter volume is detected to reach 30%-60% of the effective volume of the separation unit 20, the control unit 50 immediately sends a discharge command to the discharge unit 30 and records the current time as the discharge start time.

[0063] S32: Separation and Discharge: The separator plate 31 of the discharge unit 30 is switched to the separation position to isolate the liquid component 23 and the dry component 22 in the separation unit 20. Then, the drive is controlled to open the discharge valve to discharge the dry component 22 in the separation unit 20 to the discharge unit 30. For example, after receiving the discharge command, the control unit 50 first controls the push rod of the discharge unit 30 to switch the separator plate 31 from the conduction position to the separation position. The separator plate 31 is tightly fitted with the dry outlet of the separation unit 20 to achieve complete isolation between the dry chamber and the liquid chamber. After the push rod is completed, a feedback signal is sent to the control unit 50. The control unit 50 then controls the cylinder to open the solenoid valve. The sand dry component 22 temporarily stored in the centrifuge is smoothly discharged onto the screening structure 322 of the discharge unit 30 under its own gravity.

[0064] S33: Continuous Separation: During the discharge of dry component 22 by the discharge unit 30, the separation unit 20 continues to receive the slurry carrying cutting dry matter discharged by the slurry discharge unit 12, and continuously separates the introduced slurry into liquid component 23 and dry component 22, ensuring the continuity of the construction process. For example, during the discharge process when the discharge valve is opened, the control unit 50 controls the centrifugal separator to continue rotating, while controlling the feed valve to remain open, continuously receiving and separating the waste slurry from the slurry discharge unit 12; at this time, the newly separated dry component 22 is temporarily stored inside the separator plate 31 of the centrifugal separator. After the discharge is completed, the separator plate 31 is reset to the conductive position, and the newly separated dry component 22 moves to the outer periphery of the centrifugal separation section 21 under the action of centrifugal force, thus ensuring that the separation process and the discharge process are carried out in parallel and do not affect the efficiency of pipe jacking.

[0065] In some embodiments, the monitoring unit 40 measures the dry matter component 22 parameter discharged from the discharge unit 30 to obtain construction dry matter data; specifically, this includes the following sub-steps: S41: Dry material screening and recovery: The screening section 32 of the discharge unit 30 screens the discharged dry material components 22 and transports some of the screened target dry material components 22 to the mud circulation system.

[0066] S42: Measurement of Remaining Dry Matter Parameters: The weight sensor 42 and / or volume sensor 43 of the control monitoring unit 40 perform parameter analysis on the remaining dry matter component 22 after the target dry matter component 22 has been delivered, to obtain the mass and / or volume of the remaining dry matter. For example, after the target dry matter component 22 has been delivered, the control unit 50 controls the weight sensor 42 and volume sensor 43 to start working; the weight sensor 42 collects the pressure signal of the remaining dry matter on the bottom of the storage chamber and calculates the mass of the remaining dry matter, or the volume sensor 43 measures the stacking height of the remaining dry matter in the storage chamber and calculates the volume of the remaining dry matter.

[0067] S43: Determination of Construction Dry Matter Data: Based on the mass and / or volume of the remaining dry matter, determine the construction dry matter data for the current discharge cycle. The current discharge cycle begins with the discharge of dry matter component 22 separated by separation unit 20 in the previous discharge unit 30 and ends with the discharge of dry matter component 22 separated by separation unit 20 in this discharge unit 30. The construction dry matter data is used to determine the type and volume of backfill material. For example, if the dry matter is mainly sand and has a high content, sand can be selected as the main backfill material, and the backfill volume is calculated based on the total amount of dry matter discharged. Specifically, the start time of the current discharge cycle is the completion time of the previous discharge (assuming T1), and the end time is the completion time of this discharge (assuming T2). The control unit 50 can obtain the total dry matter generated in the current discharge cycle based on the remaining dry matter mass and the mass of the recovered target dry matter component 22. Based on this data, determine the selection of subsequent backfill materials and the backfill volume.

[0068] In some embodiments, dry matter screening and recovery: the screening section 32 of the discharge unit 30 screens the discharged dry matter components 22 and transports a portion of the screened target dry matter components 22 to the mud circulation system; specifically including: S411: Parameter acquisition: Acquire the amount of input mud and dry matter type of the preset flow rate, wherein the dry matter type is related to the particle size range of the dry matter; for example, the control unit 50 acquires the amount of input mud in the mud circulation system during the current discharge cycle, and at the same time determines the type of dry matter to be recovered as sand particles with a particle size of less than 0.5 mm based on the density of the initial input mud (1.2 g / cm³) and the characteristics of the sandy soil layer.

[0069] S412: Target Dry Matter Screening: Control the operation of the vibrator 321 of the screening section 32 to screen out dry matter components 22 that conform to the particle size range corresponding to the dry matter type through the screening holes of the screening structure 322, which are then used as target dry matter components 22; for example, the control unit 50 controls the vibrator 321 of the screening section 32 to start, so that the sand dry matter components 22 discharged from the discharge unit 30 are rapidly tumbled on the screening structure 322. Sand particles with a particle size of less than 0.5 mm fall through the screening holes into the recycling channel and become target dry matter components 22; sand particles with a particle size of more than 0.5 mm are retained on the screening structure 322 and await subsequent centralized cleaning.

[0070] S413: Quantitative Recovery: Based on the preset flow rate of the input mud, an equal amount of the target dry component 22 within the current discharge cycle is delivered to the mud circulation system to ensure that the density of the mixed mud meets the requirements. For example, based on the input mud usage within the current discharge cycle (assuming the discharge cycle duration is 15 minutes and the input mud usage is 100 m³), ​​the control unit 50 controls the opening of the electromagnetic flow valve on the recovery channel, delivering 1 m³ of the target dry component 22 to the mud circulation system according to a preset ratio (the mixing ratio of the target dry component 22 and the mud is 1:100). During the delivery process, the electromagnetic flow valve monitors the delivery volume in real time, and automatically closes the valve when the delivery volume reaches 1 m³, completing the quantitative recovery.

[0071] Optionally, the dry matter analysis method for slurry balance pipe jacking construction may also include: S5: Construction Risk Assessment: Determines whether the dry matter data during the current material discharge cycle exceeds the preset construction threshold. The preset construction threshold can be pre-set based on parameters such as the stability of the construction stratum and pipe jacking construction specifications, reflecting the allowable loss of soil. For example, based on the stability level of sandy soil strata and the requirements of pipe jacking construction specifications, the preset construction threshold can be set to 20t. The control unit 50 compares the dry matter data during the current material discharge cycle with the preset construction threshold of 20t to determine whether there is any risk in the current construction process.

[0072] S6: Risk Warning: If the dry material data of the construction in the current material discharge cycle is greater than the preset construction threshold, the control unit 50 will output an alarm message for collapse or over-limit tunneling speed. The staff can adjust the construction parameters such as tunneling speed and mud flow rate in a timely manner according to the alarm message, or take measures such as reinforcing the strata to avoid construction risks.

[0073] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A slurry balance pipe jacking construction dry matter analysis device, comprising a slurry circulation system, said slurry circulation system being used to input slurry into the pipe jacking head to establish the necessary pressure within the working chamber of the pipe jacking head, characterized in that... include; A mud discharge unit is used to discharge mud carrying cutting dry matter during construction to a separation unit. A separation unit is used to receive the mud exported by the mud export unit and separate the imported mud into liquid components and dry components. A discharge unit, which is used to discharge the dry components separated by the separation unit; The monitoring unit is used to monitor the dry matter composition parameters in the separation unit and the discharge unit; The control unit is electrically connected to the monitoring unit and the discharge unit respectively. It is used to receive the dry matter composition parameters output by the monitoring unit. When the dry matter composition parameters of the separation unit reach a preset threshold, it controls the discharge unit to open and discharge the dry matter in the separation unit.

2. The slurry balance pipe jacking construction dry matter analysis device according to claim 1, characterized in that, The input end of the mud discharge unit is connected to the working chamber of the pipe jacking machine head in the mud-water balance pipe jacking construction, and the output end of the mud discharge unit is connected to the feed port of the separation unit. The separation unit includes a centrifugal separation section, which is used to continuously separate the slurry introduced into the separation unit.

3. The slurry balance pipe jacking construction dry matter analysis device according to claim 2, characterized in that, The monitoring unit includes a force sensor, and the dry matter component parameter in the separation unit is the dry matter volume. The force sensor is used to monitor the centrifugal force on the dry matter component separated by the separation unit. Multiple force sensors are provided and installed on the outer periphery of the centrifugal separation section. The multiple force sensors are spaced apart along the height direction of the centrifugal separation section.

4. The slurry balance pipe jacking construction dry matter analysis device according to claim 1, characterized in that, The discharge unit also includes a partition plate, which switches between a separation position and a conduction position. When the partition plate is in the separation position, it isolates the liquid component and the dry component in the separation unit. When the partition plate is in the conduction position, the liquid component and the dry component in the separation unit are connected to each other.

5. The slurry balance pipe jacking construction dry matter analysis device according to claim 2, characterized in that, The mud circulation system is connected to the discharge unit and the separation unit to receive the liquid components separated by the separation unit, and further receive a portion of the dry components discharged by the discharge unit. The discharge unit also includes a screening section, which is used to screen the dry components separated by the centrifugal separation section and transport the dry components that meet the preset particle size range to the mud circulation system.

6. The slurry balance pipe jacking construction dry matter analysis device according to claim 5, characterized in that, The screening section includes a vibrator and a screening structure. The screening structure has screening holes corresponding to a preset particle size range. Under the action of the vibrator, the screening section screens the dry components discharged from the discharge unit to screen out the target dry components that are smaller than the preset particle size range.

7. The slurry balance pipe jacking construction dry matter analysis device according to claim 6, characterized in that, The mud circulation system receives the target dry components according to a preset dosage, and mixes the received target dry components with the liquid components separated by the separation unit, so that the density difference between the mixed mud and the input mud is less than 5%, and the mixed mud is used as input mud to be fed into the pipe jacking machine head for continued operation.

8. The slurry balance pipe jacking construction dry matter analysis device according to claim 7, characterized in that, The monitoring unit also includes a weight sensor. The dry matter composition parameter in the discharge unit includes dry matter mass. The weight sensor is used to periodically measure the remaining dry matter mass. The remaining dry matter mass is: the mass of dry matter discharged by the discharge unit minus the mass of dry matter remaining after the mud circulation system receives the target dry matter according to a preset dosage, and / or, The monitoring unit also includes a volume sensor. The dry matter component parameters in the discharge unit include dry matter volume. The volume sensor is used to periodically measure the remaining dry matter volume. The remaining dry matter volume is: the volume of dry matter remaining after the dry matter discharged by the discharge unit is subtracted from the volume of dry matter remaining after the mud circulation system receives the target dry matter component according to a preset dosage.

9. The slurry balance pipe jacking construction dry matter analysis device according to claim 1, characterized in that, The discharge unit also includes a discharge valve and a drive component. The drive component is electrically connected to the control unit and is used to drive the discharge valve to open and close. The discharge valve is a solenoid valve or a pneumatic valve.

10. A method for dry quality analysis in slurry balance pipe jacking construction, applied to the dry quality analysis device for slurry balance pipe jacking construction as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: Control the mud circulation system to input mud into the pipe jacking head at a preset flow rate, and control the pipe jacking head to cut dry matter to obtain mud carrying the cut dry matter; S2: Control the separation unit to receive the cutting dry material discharged by the mud discharge unit, and continuously separate the imported mud into liquid components and dry components; S3: When the monitoring unit detects that the dry component parameters in the separation unit meet the preset threshold, the discharge unit controls the discharge unit to discharge the dry component separated by the separation unit. S4: The monitoring unit further includes a weight sensor and / or a volume sensor, and the monitoring unit measures the dry matter composition parameters discharged by the discharge unit to obtain construction dry matter data.

11. The method for dry matter analysis in slurry balance pipe jacking construction according to claim 10, characterized in that, When the monitoring unit detects that the dry matter component parameters in the separation unit meet a preset threshold, the discharge unit controls the discharge unit to discharge the dry matter separated by the separation unit, including: S31: Obtain the dry matter volume in the separation unit; if the dry matter volume is greater than or equal to a preset volume threshold, the control unit sends a discharge command to the discharge unit. S32: Control the discharge unit to isolate the liquid component and dry component in the separation unit, and discharge the dry component separated by the separation unit; S33: During the process of the discharge unit discharging the dry components separated by the separation unit, the separation unit is controlled to continue to receive the slurry carrying the dry matter from the slurry discharge unit, and continuously separate the introduced slurry into liquid components and dry components. The dry matter volume in the separation unit is determined by the monitoring unit, which includes multiple force sensors. The separation unit includes a centrifugal separation section, and the multiple force sensors are disposed on the outer periphery of the centrifugal separation section and spaced apart along the height direction of the centrifugal separation section.

12. The method for dry matter analysis in slurry balance pipe jacking construction according to claim 10, characterized in that, The monitoring unit measures the dry matter composition parameters discharged by the discharge unit to obtain construction dry matter data, including: S41: Control the discharge unit to screen the discharged dry components and transport a portion of the screened target dry components to the mud circulation system; S42: Control the monitoring unit to perform dry component parameter analysis on the remaining dry components discharged from the discharge unit after conveying the target dry components, so as to obtain the dry mass and / or dry volume in the discharge unit; S43: Based on the dry mass and / or dry volume in the discharge unit, determine the construction dry mass data within the current discharge cycle. The construction dry mass data is used to determine the type and volume of backfill material. The current discharge cycle is defined as the time starting point when the dry mass separated by the separation unit is discharged in the previous discharge unit and the time ending point when the dry mass separated by the separation unit is discharged in the current discharge unit.

13. The method for dry matter analysis in slurry balance pipe jacking construction according to claim 12, characterized in that, Controlling the discharge unit to screen the discharged dry components and transporting a portion of the screened target dry components to the mud circulation system includes: S411: Obtain the amount and dry matter type of the preset flow rate input mud, wherein the dry matter type is related to the particle size range of the dry matter; S412: Control the discharge unit to screen the discharged dry components and select the dry components that conform to the particle size range of the dry type as the target dry components. S413: Based on the preset flow rate, input the amount of mud used, and deliver an equal amount of the target dry matter components within the current discharge cycle to the mud circulation system.

14. The method for dry matter analysis in slurry balance pipe jacking construction according to claim 12, characterized in that, After determining the dry matter data for the current material distribution cycle, the following is also included: S5: Determine whether the construction dry quality data is greater than the preset construction threshold; S6: If the dry matter data of the construction in the current material discharge cycle is greater than the preset construction threshold, the control unit outputs an alarm message for collapse or excessive tunneling speed.

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