A trencher with a background feed system

Abstract

The utility model relates to underground continuous wall construction equipment technical field especially, relates to a grooving machine with backstage supply system, and the technical scheme is as follows: the grooving machine body is provided with backstage supply system, backstage supply system includes cement powder input box, water tank, cement proportioning stirring bucket and cement paste storage barrel, cement powder input box and water tank are linked with cement proportioning stirring bucket respectively to supply raw material, the output of cement proportioning stirring bucket links with cement paste storage barrel to deliver cement paste, the output of cement paste storage barrel is connected with the cutting mechanism of grooving machine body, is used for inputting cement paste to the groove in the grooving process. This scheme has the advantages of improving construction efficiency, reducing the risk of slurry segregation, realizing accurate matching of proportioning and supply amount.

Description

Technical Field

[0001] This utility model relates to the technical field of underground continuous wall construction equipment, and in particular to a trenching machine with a back-end supply system. Background Technology

[0002] In existing diaphragm wall construction technologies, the cement slurry required for wall protection or filling during trenching is typically supplied by fixed, centralized mixing plants. These plants are often located far from the work site, requiring the mixed slurry to be transported by tanker trucks to the trenching machine location, and then injected via a pumping system. This fragmented supply method presents a significant efficiency bottleneck; transportation and coordination consume considerable time, resulting in a slow construction pace and hindering continuous, efficient operations. Particularly in densely populated urban areas or space-constrained construction sites, the scheduling of transport vehicles and the secondary transfer of slurry are even more difficult, severely restricting construction progress.

[0003] Furthermore, due to the distance between the fixed mixing plant and the work site, long-distance pumping or transportation can easily lead to segregation or premature setting of the cement slurry, affecting the final quality of the slurry and the wall protection effect after trenching. The degradation of slurry properties directly leads to a decrease in trench wall stability, increasing the risk of hole collapse. At the same time, this method requires additional transport vehicles and pumping equipment, increasing equipment investment and labor costs, and making flexible deployment difficult in small or complex construction sites, limiting the mobility of the trenching machine and overall construction efficiency. Especially when multiple machines are operating in tandem, the lag in the slurry supply system further amplifies the difficulty of construction organization.

[0004] Traditional grout supply methods also suffer from another problem: the grout mix ratio and supply volume cannot be precisely matched with the real-time operating conditions of the trenching machine. When the trenching machine adjusts its advance speed due to geological changes, the back-end grout supply system often fails to respond synchronously, easily leading to insufficient grout supply or waste. This disconnect not only affects construction quality but also increases the difficulty of raw material management and construction costs. The unpredictability of geological conditions makes this problem particularly prominent in complex strata construction, frequently resulting in trench wall collapse due to untimely grout supply or material waste due to excessive grout supply.

[0005] To address the aforementioned issues, existing technologies urgently need improvement. Summary of the Invention

[0006] To address the aforementioned issues, the present invention aims to provide a trenching machine with a back-end supply system, which offers advantages such as improved construction efficiency, reduced risk of slurry segregation, and precise matching of mix proportions and supply volume.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] This application provides a trenching machine with a back-end supply system, the technical solution of which is as follows: the trenching machine body is equipped with a back-end supply system; the back-end supply system includes a cement powder input box, a water tank, a cement batching and mixing tank, and a cement slurry storage tank; the cement powder input box and the water tank are respectively connected to the cement batching and mixing tank to supply raw materials; the output end of the cement batching and mixing tank is connected to the cement slurry storage tank to transport cement slurry; the output end of the cement slurry storage tank is connected to the cutting mechanism of the trenching machine body for inputting cement slurry into the trench during the trenching process.

[0009] Furthermore, this application also proposes that the water tank, cement batching and mixing tank, and cement slurry storage tank are integrated on a single box frame to form an automatic cement batching and mixing system.

[0010] Furthermore, this application also proposes that cement powder input boxes be stacked on top of the box frame.

[0011] Furthermore, this application also proposes that a water tank is provided on one side of the box frame, and a cement batching mixing tank and a cement slurry storage tank are provided on the other side, with the cement slurry storage tank located below the cement batching mixing tank.

[0012] Furthermore, this application also proposes that the cement batching mixing tank includes a mixing device and a weighing device; the weighing device is used to accurately weigh and proportion the cement powder and water, and the mixing device is used to mix the mixture.

[0013] Furthermore, this application also proposes that the stirring device starts working when the system is started and continues to operate during the batching and stirring process.

[0014] Furthermore, this application also proposes that the back-end supply system is located at the rear of the trenching machine body and above the system control of the trenching machine body.

[0015] Furthermore, this application also proposes that the output end of the cement slurry storage tank is connected to the cutting mechanism of the trenching machine body through a conveying pipeline arranged on the frame of the trenching machine body.

[0016] As can be seen from the above, the trenching machine with a background supply system and its automatic cement batching and mixing system provided in this application are provided. The trenching machine body is equipped with a background supply system. By integrating the functions of cement slurry preparation and transportation, the continuous supply of slurry during the construction process is realized, avoiding efficiency loss and slurry performance degradation caused by long-distance transportation. It has the advantages of improving construction efficiency, reducing the risk of slurry segregation, and achieving precise matching of proportion and supply. Attached Figure Description

[0017] Figure 1 This is a side view of a trenching machine with a back-end supply system provided in this application.

[0018] Figure 2 This application provides a three-dimensional construction schematic diagram of a trenching machine with a back-end supply system.

[0019] Figure 3 A schematic diagram of a back-end supply system provided in this application.

[0020] Figure 4 This is a schematic diagram of an automatic cement batching and mixing system.

[0021] Figure 5 This is a schematic diagram of the cement powder input box. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] In existing technologies, the cement slurry required for wall protection or filling during diaphragm wall construction is typically prepared at a fixed mixing plant and transported to the work site by tanker trucks. This method suffers from problems such as time-consuming transportation, slurry segregation, and poor equipment coordination. It is particularly difficult to deploy flexibly in confined or complex sites, leading to low construction efficiency and inconsistent quality. For example, during the construction of a subway foundation pit, the trenching machine was forced to stop intermittently while waiting for slurry transportation, and slurry stratification occurred during transportation, affecting the wall protection effect.

[0028] To solve the above problems, such as Figure 1-5 As shown, this embodiment designs a trenching machine with a back-end supply system, which is a technical solution including the trenching machine body 1 and the back-end supply system. The back-end supply system includes a cement powder input box 101, a water tank 104, a cement batching and mixing tank 103, and a cement slurry storage tank 105. The cement powder input box 101 and the water tank 104 are respectively connected to the batching and mixing tank to supply raw materials. The output end of the mixing tank is connected to the storage tank, and the storage tank is connected to the cutting mechanism of the trenching machine through a conveying pipeline 8.

[0029] Among them, the cement powder input box 101 is a sealed container for storing dry powder materials, which can be implemented using a steel structure box with a conveying device, and the powder feeding amount is controlled by a variable frequency motor. The water tank 104 is a water storage device, which can be implemented using a stainless steel container with a liquid level sensor, and the water flow rate is controlled by a solenoid valve. The cement batching and mixing tank 103 is a container with mixing function, which can be implemented using a double-layer paddle agitator and a weighing sensor, enabling precise control of the powder-to-water ratio. The cement slurry storage tank 105 is a container for temporarily storing the mixed slurry, which can be implemented using a conical tank with a stirring and holding device to prevent the slurry from settling and separating.

[0030] Specifically, the cement powder input box 101 injects a fixed amount of powder into the batching and mixing tank via a conveyor, while the water tank 104 simultaneously injects a set amount of water via a metering pump. A weighing sensor inside the batching and mixing tank monitors the material weight in real time, and the mixing program is activated when the preset proportion is reached. The mixed slurry is temporarily stored in a storage tank via a bottom discharge valve, where a low-speed agitator maintains the slurry's uniformity. The storage tank then delivers the slurry to the grouting port at the cutting head of the trenching machine via a hose pump; the grouting flow rate and cutting feed speed are controlled by a PLC. Through this technical solution, this application achieves the temporal and spatial unification of slurry preparation and construction procedures, eliminating the constraints of transportation on construction efficiency. Precise proportion control ensures the stability of slurry quality, and the modular design allows the equipment to adapt to different site conditions. The linkage control system ensures that the slurry supply is matched with the construction progress in real time, avoiding material waste and equipment idling.

[0031] like Figure 1 As shown, the output end of the cement slurry storage tank 105 is connected to the cutting mechanism of the trenching machine body 1 via a conveying pipeline 8 arranged on the frame of the trenching machine body 1. The conveying pipeline 8 refers to the pipe structure used to transport the cement slurry, which can be made of corrosion-resistant metal or polymer materials, and its inner diameter can be adjusted according to the slurry flow requirements. This feature reduces the risk of segregation due to stagnation during slurry transport by shortening the slurry flow path. The arrangement on the frame refers to fixing the conveying pipeline 8 inside or on the surface of the support frame of the trenching machine body 1, which can be achieved through welding, bolting, or snap-fit ​​fixing. This feature, by integrating the pipeline with the frame, avoids displacement or leakage of external pipelines due to construction vibration or environmental interference, thereby ensuring transport stability. Specifically, the conveying pipeline 8 between the cement slurry storage tank 105 and the cutting mechanism is integrated into the frame structure of the trenching machine body 1. After the slurry is output from the storage tank, it is directly transported to the working position of the cutting mechanism through the pipeline built into or attached to the frame. Because the pipeline path is confined within the frame, the slurry flow time is significantly shortened, avoiding segregation or initial setting problems caused by time delays in traditional long-distance pumping. Simultaneously, the frame, as a rigid support structure, effectively suppresses pipeline deformation caused by equipment movement or vibration, maintaining the pipeline's sealing and directional delivery capabilities. Furthermore, the frame-integrated pipeline design allows for spatial coordination between the slurry supply system and the trenching machine's operations. For example, when the cutting mechanism adjusts its feed speed, the slurry supply can be synchronized with the equipment's movements through the pipeline layout, eliminating the need for external pumping equipment.

[0032] like Figure 3 and 4As shown, the water tank 104, cement batching and mixing tank 103, and cement slurry storage tank 105 are integrated on a box frame 108, together forming an automatic cement batching and mixing system 102. The box frame 108 is a rigid support structure that supports each functional module. It can be implemented using a welded or bolted steel frame, used to fix the relative positions of the water tank 104, cement batching and mixing tank 103, and cement slurry storage tank 105, forming a compact layout. The automatic cement batching and mixing system 102 is a device that integrates raw material storage, proportioning, mixing, and slurry temporary storage functions. This can be achieved by connecting each module through pipelines and configuring an automatic control unit, realizing continuous operation from raw material input to slurry output.

[0033] Specifically, the cement powder input tank 101 and water tank 104 are connected to the cement batching and mixing tank 103 via conveying pipelines. Cement powder and water are conveyed into the mixing tank according to a preset ratio and mixed. The mixed slurry is temporarily stored in the cement slurry storage tank 105 below by gravity or pumping, and finally supplied to the cutting mechanism of the trenching machine through the conveying pipeline 8. The box frame 108 integrates the originally scattered slurry supply equipment into a single system through modular design, shortening the material transmission path and reducing the equipment footprint. The physical integration of each functional module eliminates the transportation links required by the split layout, enabling the cement slurry preparation and trenching operation to be synchronized. Through the above technical solution, this application achieves a high degree of integration of the slurry supply equipment, reduces the construction site area, and shortens the transmission distance of cement slurry from preparation to pouring. The optimization of the material transmission path reduces the probability of slurry segregation and ensures the stability of the wall-protecting slurry during the trenching process. The integration of the automated batching and mixing process reduces the need for manual intervention and improves the slurry supply efficiency and proportioning accuracy. Furthermore, the mobility of the integrated system allows it to fit closely with the trenching machine body 1, adapting to the space constraints of different construction environments.

[0034] like Figure 3 and 5As shown, the cement powder input box 101 is stacked on top of the box frame 108. This stacking arrangement means that the cement powder input boxes 101 are arranged vertically in the upper area of ​​the box frame 108, specifically using a steel structure support with positioning slots. This structure allows the cement powder input boxes 101 to form a gravity conveying path with the equipment below. The box frame 108 is the supporting structure used to support and fix the various functional modules, specifically using a modular welded steel frame. This frame provides installation space for different functional components through a layered design. Specifically, the cement powder input box 101 is vertically installed on top of the box frame 108, with its bottom outlet directly aligned with the inlet of the cement batching and mixing tank 103 below. When material is released from the cement powder input box 101, the powder falls directly into the mixing tank vertically under gravity, eliminating the need for horizontal conveying equipment. The height of the housing frame 108 is configured to allow sufficient fall space between the cement powder input box 101 and the mixing tank, while ensuring the overall structure remains compact in the vertical direction. Through the above technical solution, this application solves the problem of low space utilization in integrated cement powder input systems. Gravity conveying instead of mechanical conveying reduces equipment energy consumption and maintenance requirements, the vertical layout allows for a more rational allocation of internal space within the housing frame 108, and the sealing of the raw material conveying process is enhanced, avoiding the risk of leakage of powder during horizontal conveying.

[0035] like Figure 4 As shown, a water tank 104 is installed on one side of the box frame 108, and a cement batching mixing tank 103 and a cement slurry storage tank 105 are installed vertically on the other side, with the cement slurry storage tank 105 located below the cement batching mixing tank 103. The water tank 104 on one side of the box frame 108 is independently arranged on the side of the frame. Specifically, the water tank 104 can be installed on the side of the frame by welding or bolting. This independent layout avoids cross-contamination with the powder equipment and facilitates separate water supply and maintenance. The cement batching mixing tank 103 and the cement slurry storage tank 105 on the other side are arranged vertically in layers. Specifically, a support frame can be used to fix the mixing tank above the storage tank, allowing gravity to allow the mixed slurry to flow directly into the storage tank, reducing energy consumption and time loss in pumping or transfer. The cement slurry storage tank 105 is located below the cement batching and mixing tank 103, which means that a slurry self-flowing channel is formed by vertical layout. Specifically, the bottom of the mixing tank and the top of the storage tank can be connected by a pipe, which shortens the slurry transportation path and simplifies the pipeline structure, while reducing the overall height of the equipment to enhance the stability of the frame.

[0036] Specifically, water tank 104 on one side of the frame 108 supplies water to the mixing tank via an independent pipe. After the cement powder and water are mixed in the mixing tank on the other side, the slurry flows directly into the storage tank below by gravity. This vertical layout creates a continuous production process between mixing and storage, eliminating the need for additional transfer equipment and reducing the complexity of intermediate steps. The asymmetrical design on both sides of the frame optimizes space allocation, avoiding the problem of excessive floor space caused by planar equipment layout, while also reducing reliance on pumping equipment through gravity flow. Through the above technical solutions, this application solves the problems of low construction efficiency and wasted space caused by the dispersed layout of traditional equipment. By optimizing equipment integration through vertical layering and asymmetrical arrangement, the slurry transport path is shortened, reducing energy and time consumption in the transfer process, while simultaneously improving the stability of the frame structure and its site adaptability.

[0037] Furthermore, the cement batching mixing tank 103 includes a mixing device and a weighing device. The weighing device is used to accurately weigh and proportion the cement powder and water, while the mixing device is used to stir the mixture. The mixing device is a device that uses mechanical action to uniformly mix the cement powder and water; specifically, it can be an electric mixer with spiral blades. The shear force generated by rotation breaks up powder clumps and promotes dispersion. The weighing device is a metering device that can monitor the weight of raw materials in real time; specifically, it can be an electronic scale or a pressure sensor. Dynamic feedback is used to adjust the powder-to-water ratio. Specifically, the weighing device continuously monitors the weight changes of the cement powder and water during the feeding process. When the preset proportion is reached, the raw material supply is stopped, ensuring that the weight error of each feeding is controlled within the allowable range. The mixing device starts immediately after feeding, and the high-speed rotation of the spiral blades thoroughly mixes the powder and water to form a uniform cement slurry. During this process, the weighing device and the mixing device are linked through a control system. The weighing data is transmitted to the mixing device in real time to adjust the mixing speed and time, ensuring that the mixing effect and proportion accuracy are simultaneously achieved.

[0038] In the specific design, the mixing device starts working immediately upon system startup and continues operating throughout the batching and mixing processes. "Starting working immediately upon system startup" means the drive unit of the mixing mechanism starts immediately after the system is powered on. This can be achieved using a motor controller with a delayed start function, ensuring the mixing blades are already rotating before materials are added. "Continuous operation" means the mixing device operates without interruption during the batching and mixing stages. This can be achieved by configuring a variable frequency motor with continuous operation mode, avoiding material sedimentation caused by start-stop cycles. Specifically, the mixing device starts operating immediately after system startup, at which point the cement powder input box 101 and water tank 104 begin feeding raw materials into the mixing tank. During the addition of powder and water, the continuously rotating mixing blades mix the materials in real time, preventing the powder from clumping upon contact with water. As materials are continuously added, the mixing device maintains a constant speed, ensuring sufficient contact between the newly added materials and the already mixed slurry. When the cutting mechanism of the troughing machine needs to adjust the slurry supply, the continuously operating mixing device can achieve dynamic balance of slurry concentration by adjusting the feeding speed, avoiding slurry stratification caused by traditional intermittent mixing.

[0039] like Figure 1 As shown, the back-end supply system is located at the rear of the trenching machine body 1, and above the system control unit 7 of the trenching machine body 1. The rear refers to the area behind the trenching machine body 1, which can be achieved by fixing the installation base of the supply system to the rear frame of the trenching machine. This layout creates a compact spatial connection between the supply system and the trenching machine's operating area. Above the system control unit 7 refers to the vertical separation between the bottom support structure of the supply system and the top of the control unit. This can be achieved by installing a load-bearing bracket on top of the control unit for layered installation. This design ensures that the maintenance of the supply system and the monitoring of the control system do not interfere with each other. Specifically, the layered structure of the supply system and the system control unit 7 allows operators to complete slurry preparation monitoring and equipment control operations within the same vertical space, reducing overlapping work routes. The rear-mounted, stacked layout of the supply system further utilizes the three-dimensional space of the trenching machine body 1; for example, in confined spaces, it can improve equipment deployment flexibility by reducing the lateral footprint. This design integrates the supply system with the trenching machine body 1 through a rear-mounted stacked layout. This not only shortens the slurry delivery distance but also avoids excessive equipment footprint through vertical functional zoning, making it particularly suitable for confined construction environments such as tunnels or foundation pits. The layered design of this design establishes a physical location link between the key control unit and the supply unit, improving operational coordination efficiency.

[0040] In summary, this application provides a trenching machine with a back-end supply system and its automatic cement batching and mixing system 102. The trenching machine body 1 is equipped with a back-end supply system, which integrates cement slurry preparation and transportation functions to achieve continuous supply of slurry during construction, avoiding efficiency loss and slurry performance degradation caused by long-distance transportation. It has the advantages of improving construction efficiency, reducing the risk of slurry segregation, and achieving precise matching of proportion and supply.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A trenching machine with a back-end supply system, comprising a trenching machine body (1), characterized in that, The trenching machine body (1) is equipped with a background supply system; The background supply system includes a cement powder input box (101), a water tank (104), a cement batching and mixing tank (103), and a cement slurry storage tank (105). The cement powder input box (101) and water tank (104) are respectively connected to the cement batching and mixing tank (103) to supply raw materials; The output end of the cement batching and mixing tank (103) is connected to the cement slurry storage tank (105) to transport cement slurry; The output end of the cement slurry storage tank (105) is connected to the cutting mechanism of the trenching machine body (1) for inputting cement slurry into the trench during the trenching process.

2. The trenching machine with a back-end supply system according to claim 1, characterized in that, The water tank (104), cement batching and mixing tank (103) and cement slurry storage tank (105) are integrated on a box frame (108) to form an automatic cement batching and mixing system (102).

3. The trenching machine with a back-end supply system according to claim 2, characterized in that, The cement powder input box (101) is stacked on top of the box frame (108).

4. The trenching machine with a back-end supply system according to claim 2, characterized in that, The water tank (104) is provided on one side of the box frame (108), and the cement batching mixing tank (103) and cement slurry storage tank (105) are provided on the other side, with the cement slurry storage tank (105) located below the cement batching mixing tank (103).

5. The trenching machine with a back-end supply system according to claim 1, characterized in that, The cement batching mixing tank (103) includes a mixing device and a weighing device; The weighing device is used to accurately weigh and mix cement powder and water, and the stirring device is used to stir the mixture.

6. The trenching machine with a back-end supply system according to claim 5, characterized in that, The stirring device starts working when the system is started and continues to operate during the ingredient preparation and stirring process.

7. The trenching machine with a back-end supply system according to claim 1, characterized in that, The background supply system is located on the rear side of the trenching machine body (1) and above the system control (7) of the trenching machine body (1).

8. The trenching machine with a back-end supply system according to claim 1, characterized in that, The output end of the cement slurry storage tank (105) is connected to the cutting mechanism of the trenching machine body (1) through a conveying pipeline (8) arranged on the frame of the trenching machine body (1).

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