Municipal engineering groove excavating device

Abstract

The invention belongs to the technical field of municipal engineering, and particularly relates to a municipal engineering groove excavating device which comprises an excavating assembly, a conveying mechanism and a moving mechanism. The conveying mechanism is used for conveying soil; the moving mechanism is used for moving the conveying mechanism and the excavating mechanism; the conveying mechanism comprises a negative pressure machine and a pipeline, the negative pressure machine is fixedly connected with the moving mechanism, one end of the pipeline is communicated with the negative pressure machine, and the other end of the pipeline wraps the digging assembly. According to the scheme, the problem that dust is large in the excavating process is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of municipal engineering, in particular to a municipal engineering trench excavation device. Background Art

[0002] Municipal construction generally refers to urban infrastructure development projects, encompassing multiple aspects aimed at improving a city's functionality and the quality of life for its residents. Public transportation is a crucial component, encompassing the construction and maintenance of roads, bridges, subways, light rail, and other transportation vehicles to ensure convenient transportation for citizens. These excavation activities often generate significant noise and dust, disrupting the normal operation of hospitals and affecting the rest of other patients.

[0003] Currently, the existing announcement number CN119243800A discloses trench excavation equipment for municipal engineering construction, which includes a base frame, a drill assembly, a soil cutting assembly, and a soil discharge mechanism. The soil discharge mechanism includes an adjustable soil discharge frame connected to the base frame, arranged at an angle, with one end of the soil discharge frame extending downward through the base frame and the other end extending rearward and upward. The soil discharge frame is provided with a soil discharge conveyor belt and a cleaning assembly for cleaning the soil discharge conveyor belt. A soil guide mechanism is also provided at the rear of the soil discharge mechanism, mounted at the rear of the base frame, for directing soil transferred from the soil discharge conveyor belt out of both sides of the base frame. This trench excavation equipment can prevent soil from accumulating or clogging on the soil discharge and guide mechanisms, making soil discharge and guidance smoother and more stable. It also facilitates automatic cleaning of the soil discharge mechanism after excavation is completed.

[0004] However, there are some issues: 1. The noise generated by these excavation activities often disrupts the tranquility of the hospital, affecting patients' rest and recovery. Hospitals are supposed to be quiet and comfortable places where patients can rest and recover, but these noises disrupt this tranquility, preventing patients from getting adequate rest and even potentially exacerbating their conditions.

[0005] 2. Dust generated by excavation activities also affects the hospital environment and patient health. Dust pollutes the hospital air, reducing the quality of the air patients breathe and posing a health risk. Dust also damages the hospital environment and makes cleaning more difficult. Summary of the Invention

[0006] This solution provides a municipal engineering trench excavation device to solve the problem of large dust during the excavation process.

[0007] In order to solve this problem, this solution provides a municipal engineering trench excavation device, comprising:

[0008] Excavation assembly: used for digging trenches;

[0009] Conveying mechanism: used to transport soil;

[0010] Mobile mechanism: used to move the conveying mechanism and the excavating mechanism;

[0011] The conveying mechanism includes a negative pressure machine and a pipeline. The negative pressure machine is fixedly connected to the moving mechanism. One end of the pipeline is connected to the negative pressure machine, and the other end wraps the excavation component.

[0012] The principle of this solution is as follows: the excavation unit begins operation, cutting, breaking, and loosening the ground. The vacuum pump operates, creating a localized negative pressure space within the excavation area through a pipeline. Dust particles and soil generated during excavation are drawn into the pipeline and transported to the mobile mechanism by the negative pressure. The mobile mechanism controls the forward and reverse directions of the device according to construction needs, enabling continuous operation.

[0013] The beneficial effects of this solution are: 1. It effectively suppresses dust diffusion by using negative pressure adsorption technology, improving the construction environment. 2. At the same time, the excavated soil can be adsorbed onto the mobile mechanism through the negative pressure machine, completing the soil transportation step.

[0014] The system further includes a sliding tube that is slidably connected to the pipeline and has a larger diameter than the pipeline. The excavation assembly is fixedly connected to the sliding tube. The sliding tube and the pipeline form a movable, relatively enclosed space that covers the excavation area. The sliding tube can extend or shorten the pipeline to ensure that the kettle can cover deeper areas, thereby improving the suction efficiency of the vacuum machine.

[0015] Furthermore, the moving mechanism includes a truck and a storage box, the truck is used for movement, the storage box is used for storing soil, and the negative pressure machine is arranged in the storage box.

[0016] As the main mobile platform for the entire excavation device, the truck provides the necessary mobility. This means that the equipment can quickly reach the construction site or be flexibly moved within the construction area to adapt to different excavation location requirements.

[0017] Storage boxes are used to temporarily store soil collected from the excavation site by the conveyor. This not only helps to keep the construction site clean and tidy and reduce the impact on the surrounding environment, but also facilitates the subsequent processing or transportation of the soil.

[0018] Placing the vacuum pump inside the storage tank efficiently utilizes space while protecting it from external conditions such as dust and moisture. This layout also facilitates centralized management and maintenance of the equipment. The vacuum pump is connected to the excavation assembly via a piping system, forming a closed dust collection system that ensures that dust generated during excavation is effectively drawn in and transported to the storage tank.

[0019] Furthermore, the invention further comprises a crusher for crushing soil, wherein the crusher is located above the drill bit and inside the sliding tube.

[0020] Positioning the crusher above the drill bit allows immediate processing of freshly excavated material, ensuring that the material entering the conveyor system is as small as possible and of the appropriate size. Its location within the slide tube helps keep the entire system compact while also providing a protective space within the slide tube to prevent scattering debris during the crushing process, improving safety and minimizing environmental impact.

[0021] The excavation mechanism includes a drill bit, a motor and a transmission mechanism. The motor is fixedly connected to the sliding tube. The motor is connected to the drill bit through the transmission mechanism. The drill bit matches the sliding tube.

[0022] The motor, the power source, is mounted directly on the sliding tube. This allows the motor to move with the tube, ensuring stable power regardless of the digging assembly's repositioning. The drill bit, the component that directly contacts the soil, must be designed for efficient soil penetration and minimal drag. The combination of the drill bit and the sliding tube means the drill bit's operating position can be relatively fixed or flexibly adjusted within a certain range to accommodate digging at varying depths or angles.

[0023] Furthermore, the transmission mechanism includes a first bevel gear and a second bevel gear, the first bevel gear is fixedly connected to the shaft of the motor, the second bevel gear is fixedly connected to the drill bit, and the first bevel gear and the second bevel gear are meshed.

[0024] When the motor runs, it rotates the first bevel gear. This in turn rotates the second bevel gear. This rotation of the second bevel gear also rotates the drill bit, enabling excavation. The use of bevel gears allows for compact assembly because the motor and drill bit do not need to be coaxial. This helps optimize the design of the entire device, making it more compact and efficient.

[0025] Furthermore, it also includes a sound insulation component, which includes a first sound insulation board and a second sound insulation board. The first sound insulation board is rotatably connected to the sliding tube, and the second sound insulation board is slidably connected to the first sound insulation board.

[0026] The first sound insulation board can be adjusted in angle to accommodate trenches of varying sizes, thereby improving the device's adaptability and reducing noise generated by excavation activities. This provides a more comfortable treatment and recuperation environment, aiding patients' rapid recovery. It also allows medical staff to work in a quieter environment, allowing them to better focus on medical activities and improving the quality of medical services. The second sound insulation board can adapt to uneven surfaces to ensure effective sound insulation.

[0027] Furthermore, the system includes a filter plate, which is located above the crusher to filter out large rocks. Large rocks, if left untreated, can enter the crusher or conveying pipelines and cause blockage, wear, or even damage to critical components. The filter plate intercepts these dangerous substances in advance, providing protection.

[0028] Furthermore, it also includes a cleaning mechanism, which includes a nozzle, a cavity, a piston and a sliding rod. The cavity is arranged inside the pipeline, and the cavity is provided with a liquid inlet pipe and a liquid outlet pipe. The liquid inlet pipe is used to connect to a water source, and the liquid inlet pipe and the liquid outlet pipe are both provided with a one-way valve;

[0029] The piston is connected to the cavity in a sliding and sealing manner. One end of the sliding rod is fixedly connected to the filter plate, and the other end is fixedly connected to the piston. The liquid outlet pipe is communicated with the nozzle, and the nozzle cooperates with the filter plate.

[0030] Running the vacuum cleaner continuously will accelerate the wear of the vacuum cleaner and its related components, increasing maintenance frequency and costs. The vacuum cleaner in this solution uses intermittent periodic startup. When the vacuum cleaner is started, the filter plate will move upward due to suction, causing the sliding rod to move upward. The upward movement of the sliding rod will drive the piston upward. The upward movement of the piston can squeeze the water in the cavity to the nozzle, and then spray it out from the nozzle to reduce dust in the surrounding area and backwash the filter plate.

[0031] When the negative pressure machine stops, the filter plate will move downward due to gravity, the sliding rod will move downward accordingly, and the piston will also move downward, which will cause the cavity to absorb water from the liquid inlet pipe into the cavity, preparing for the next flushing.

[0032] Since the negative pressure machine of this mechanism adopts intermittent periodic start-up, unnecessary running time is reduced, thereby reducing the wear rate and failure risk of the equipment and extending the service life of the negative pressure machine and related components.

[0033] When the vacuum is activated, the filter plates move upward due to suction, driving the sliding rod and piston upward, squeezing the water in the chamber to the nozzle, removing dust from the surrounding air and simultaneously backwashing the filter plate surface. This linkage mechanism ensures that the filter plates are effectively cleaned every time the vacuum is activated, preventing mud or debris from clogging the filter holes and maintaining the filter plates in optimal working condition.

[0034] Furthermore, the filter plate includes an anti-blocking section, a filter hole section and a cavity protection section. The anti-blocking section cooperates with the water outlet of the nozzle, the filter hole section cooperates with the pipeline, and the cavity protection section cooperates with the cavity.

[0035] During vacuuming, dust and dirt can easily clog the nozzle and the sliding rod. In this solution, when the vacuum is activated, the filter plate moves upward, allowing the anti-blocking section to precisely block the nozzle's water outlet, preventing dirt from entering. Simultaneously, the cavity protection section precisely covers the sliding area, creating a barrier and reducing dirt from entering the sliding rod's sliding area.

[0036] When the vacuum machine stops, the filter plate moves down due to gravity, the anti-blocking section leaves the nozzle position, and the cavity protection section also moves down synchronously; the nozzle is exposed, the piston moves down, and the cavity sucks in new water; when the vacuum machine is started next time, the nozzle starts to spray water to clean the surface of the filter plate; because of the existence of the cavity protection section, the sliding rod connection is always in a "protected state", avoiding the intrusion of mud and sand.

[0037] The anti-clogging section of this mechanism automatically blocks the nozzle outlet during non-spraying phases, preventing dirt and dust from entering the nozzle interior and preventing blockage after long-term use. The cavity protection section acts as a "protective cover," covering the connection between the sliding rod and the filter plate during movement, preventing dust and mud from entering the sliding area and reducing the risk of jamming or wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0039] Figure 2 It is a schematic diagram of the mobile structure of the present invention;

[0040] Figure 3 It is a schematic diagram of the conveying mechanism of the present invention;

[0041] Figure 4 is a first cross-sectional view of the excavation assembly of the present invention;

[0042] Figure 5 is a second cross-sectional schematic view of the excavation assembly of the present invention;

[0043] Figure 6 is a schematic diagram of a sound insulation assembly of the present invention;

[0044] Figure 7 For the present invention Figure 4 A in the middle is an enlarged schematic diagram;

[0045] Figure 8 For the present invention Figure 5 The enlarged schematic diagram of point B in the middle;

[0046] Figure 9This is a state diagram of the cleaning mechanism of the present invention when vacuuming;

[0047] Figure 10 This is a state diagram of the cleaning mechanism of the present invention when it stops vacuuming.

[0048] The reference numerals in the specification include: 100, moving mechanism; 101, truck; 102, storage box; 200, conveying mechanism; 201, negative pressure machine; 202, pipeline; 203, sliding pipe; 300, excavation assembly; 301, drill bit; 302, crusher; 303, mounting frame; 304, motor; 305, rotating rod; 306, belt; 307, first bevel gear; 308, second bevel gear; 310, elastic member; 30 9. Sound insulation assembly; 3091. First sound insulation board; 3092. Slide rail; 3093. Push rod; 3094. Spring; 3095. Limit rod; 3096. Second sound insulation board; 401. Cavity; 402. Limit block; 403. Slide rod; 404. Piston; 405. Liquid inlet pipe; 406. Liquid outlet pipe; 407. Nozzle; 408. Filter hole section; 409. Anti-blocking section; 410. Second spring; 411. Cavity protection section. DETAILED DESCRIPTION

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0050] In existing technology, many public places such as hospitals often require ground excavation when carrying out small-scale construction projects, such as laying cables and repairing pipelines 202. These excavation activities usually generate a lot of noise and dust, which have a certain impact on the normal operation of the hospital and also affect the rest of other patients.

[0051] First, the noise generated by these excavation activities often disrupts the tranquility of the hospital, affecting patients' rest and recovery. Hospitals are supposed to be quiet, comfortable places where patients can rest and recuperate, but these noises disrupt this tranquility, preventing them from getting adequate rest and potentially exacerbating their condition. Second, the dust generated by excavation activities also impacts the hospital environment and the health of patients. Dust pollutes the hospital's air, reducing the quality of the air patients breathe and posing a health threat. Dust also damages the hospital environment and makes cleaning more difficult. Furthermore, to facilitate backfilling, excavated soil is often piled on the hospital's internal roads. This not only takes up space but can also hinder vehicles that need to pass urgently. For example, if ambulances or vehicles transporting medicine and medical equipment are unable to pass through in a timely manner due to the accumulation of soil, this can seriously impact the normal operation of the hospital. Therefore, this embodiment provides a trench excavation device for municipal engineering projects.

[0052] like Figure 1 、 Figure 2 、 Figure 3 As shown:

[0053] This embodiment provides a trench excavation device for municipal engineering, including a mobile mechanism 100, which includes a truck 101 and a storage box 102. The storage box 102 is installed on the rear side of the truck 101, and a conveying mechanism 200 is provided on the upper side of the storage box 102. The front end of the conveying mechanism 200 is provided with an excavation component 300.

[0054] While the mobile mechanism 100 drives the excavating assembly 300 to rotate and crush the soil, the conveying mechanism 200 generates negative pressure to suck the soil crushed by the excavating assembly 300 into the interior of the mobile mechanism 100, so that the mobile mechanism 100 can move the accumulated soil at any time.

[0055] As attached Figure 1 、 Figure 4 As shown:

[0056] Considering the potential for hospital construction to prevent the use of an excavator bucket from severing buried optical cables, these cables are crucial infrastructure for the hospital's normal operation, transmitting a variety of important information and data, including patient medical records, medical equipment operating data, and hospital management information. If these cables were severed, the hospital's operations would be severely impacted. Therefore, an excavation assembly 300 is provided. The excavation assembly 300 rotates to break up and excavate the ground. This rotation allows for precise control of drilling depth and position, helping to avoid underground pipelines, including optical cables. Different types of excavators can be selected based on different geological conditions, such as soil layers, soft rock, or hard rock. This adaptability helps reduce the risk of accidentally severing underground facilities.

[0057] Furthermore, considering that dust generated by the rotation and crushing of the soil by the excavating assembly 300 can also affect the hospital environment and the health of patients, the dust can pollute the hospital's air, reducing the quality of the air patients breathe and posing a threat to their health, the conveying mechanism 200 is provided. By generating negative pressure, the conveying mechanism 200 draws the generated dust into the interior of the moving mechanism 100, thereby reducing the dust generated by the excavating assembly 300 and effectively minimizing the impact of dust on the hospital environment and patient health.

[0058] Finally, considering that excavated soil is often piled up on the hospital's internal roads to facilitate backfilling, this not only takes up road space but also may hinder vehicles that need to pass urgently. For example, if ambulances, vehicles transporting medicines and medical equipment, etc. are unable to pass through in a timely manner due to the accumulation of soil, it may have a serious impact on the normal operation of the hospital. Therefore, by providing a mobile mechanism 100 to accumulate the soil sucked in by the conveying mechanism 200, when a vehicle needs to pass urgently, the mobile mechanism 100 can quickly move with the soil to make way for the road that needs to pass, effectively avoiding the serious impact on the normal operation of the hospital caused by the accumulation of soil.

[0059] As attached Figure 4 、 Figure 5 、 Figure 7 As shown:

[0060] First, the excavation component 300 is to be realized to crush and dig the land by rotation. The excavation component 300 includes a drill bit 301, and the drill bit 301 is used to rotate and crush the land. The drill bit 301 is installed on the inner wall of the sliding tube 203. The sliding tube 203 is used to support the drill bit 301 for rotation. The drill bit 301 is used to rotate and crush the land. The side wall of the sliding tube 203 is fixedly connected with a mounting frame 303. The mounting frame 303 is used to ensure the stable operation of the motor 304. The motor 304 is installed on the upper side of the mounting frame 303. The motor 304 is used to drive the rotating rod 305 to rotate, so that the motor 304 drives the rotating rod 305 to rotate. The output end of the motor 304 is connected to the rotating rod 305. 5. The rotating rod 305 is used to drive the first bevel gear 307 to rotate, so that the rotation of the rotating rod 305 drives the first bevel gear 307 to rotate. The other end of the rotating rod 305 passes through the side wall of the sliding tube 203 and is fixedly connected to the first bevel gear 307. The first bevel gear 307 is used to drive the second bevel gear 308 to rotate, so that the rotation of the first bevel gear 307 drives the second bevel gear 308 to rotate. The side wall of the first bevel gear 307 is meshed with the second bevel gear 308. The second bevel gear 308 is used to drive the drill bit 301 to rotate. The lower side of the second bevel gear 308 is fixedly connected to the upper end of the drill bit 301, so that the rotation of the second bevel gear 308 drives the drill bit 301 to rotate.

[0061] Specifically, when the motor 304 is started, the output end of the motor 304 drives the rotating rod 305 to rotate. After the rotating rod 305 rotates, it drives the first bevel gear 307 to rotate. The rotation of the first bevel gear 307 drives the second bevel gear 308 to rotate. The rotation of the second bevel gear 308 drives the drill bit 301 to rotate, so that when the drill bit 301 contacts the ground, it will rotate and crush the soil.

[0062] As attached Figure 2 、 Figure 3 As shown:

[0063] Secondly, to enable the conveying mechanism 200 to draw the soil crushed by the excavation assembly 300 into the interior of the mobile mechanism 100, the conveying mechanism 200 includes a negative pressure device 201. The negative pressure device 201 is a device that can generate a gas pressure state lower than atmospheric pressure. By generating a pressure difference, the atmospheric pressure pushes the soil into the pipe 202. The negative pressure device 201 is electrically connected to the control system on the mobile mechanism 100. The negative pressure device 201 is installed inside the storage box 102. The output end of the negative pressure device 201 is fixedly connected to the pipe 202. The pipe 202 is used to allow soil to enter the interior of the mobile mechanism 100. The end of the pipe 202 away from the negative pressure device 201 is slidably connected to the sliding pipe 203. The sliding pipe 203 is an electric sliding pipe used to drive the excavation assembly 300 to move up and down, thereby driving the drill bit 301 to move up and down.

[0064] Specifically, when the negative pressure machine 201 is started, it generates a gas pressure state lower than the atmospheric pressure. By generating a pressure difference, the atmospheric pressure pushes the soil material crushed by the drill bit 301 into the pipe 202. At this time, the sliding tube 203 will slide down and move the drill bit 301 deeper into the ground for rotation and crushing, thereby continuously sucking the soil material crushed by the drill bit 301301 into the inside of the pipe 202, avoiding the dust generated by the crushed soil material during excavation from being exposed to the outside air.

[0065] As attached Figure 1 As shown:

[0066] Finally, in order to realize the storage and quick movement of soil materials by the mobile mechanism 100, the mobile mechanism 100 includes a truck 101 and a storage box 102. The truck 101 is used to carry and move the storage box 102, and the storage box 102 is used to store soil materials, so that the truck 101 can move the soil materials stored in the storage box 102 at any time.

[0067] As attached Figure 4 、 Figure 5 、 Figure 6 As shown:

[0068] Considering that the noise generated by excavation activities often disrupts the tranquil environment of the hospital, affecting patients' rest and recovery. Hospitals are supposed to be quiet and comfortable places where patients can rest and recuperate, these noises disrupt this tranquility, preventing them from getting adequate rest. Therefore, a sound insulation assembly 309 is installed below the sliding tube 203. The sound insulation assembly 309 includes four first sound insulation panels 3091. The inner sides of these first sound insulation panels 3091 are coated with sound-absorbing material to effectively reduce noise transmission. The upper sides of the four first sound insulation panels 3091 are rotatably connected to the four side walls of the lower end of the sliding tube 203. The first sound insulation panels 3091 can be adjusted at different angles to accommodate grooves of different sizes, thereby improving the adaptability of the device.

[0069] The first sound insulation plate 3091 cannot completely insulate sound due to uneven ground, and therefore a sliding rail 3092 is rotatably connected to the lower side of the first sound insulation plate 3091, the sliding rail 3092 is used to slide a second sound insulation plate 3096, the second sound insulation plate 3096 is slidably connected to the inner wall of the sliding rail 3092, and the inner wall of the sliding rail 3092 and the upper side of the second sound insulation plate 3096 are fixedly connected together with a spring 3094, the spring 3094 is used to push the second sound insulation plate 3096 to slide, so that the spring 3094 pushes the second sound insulation plate 3096 to slide, the inner wall of the sliding rail 3092 is fixedly connected with a limiting rod 3095, and the limiting rod 3095 penetrates the inside of the spring 3094 and is inserted into the inside of the second sound insulation plate 3096, the limiting rod 3095 is used to limit the deformation track of the spring 3094 to ensure normal work of the spring 3094, and the inner side of the first sound insulation plate 3091 and the inner side of the second sound insulation plate 3096 are rotatably connected with a push rod 3093, the push rod 3093 is used to push the first sound insulation plate 3091 by the second sound insulation plate 3096, so that the second sound insulation plate 3096 slides to push the push rod 3093, and then the push rod 3093 pushes the first sound insulation plate 3091, and the two sides of the first sound insulation plate 3091 are fixedly connected with elastic members 310, and the elastic members 310 are elastic sound insulation cloth.

[0070] Specifically, when the sliding pipe 203 moves downward, the first sound insulation plate 3091 moves downward, the first sound insulation plate 3091 moves downward to drive the sliding rail 3092 to move downward, the sliding rail 3092 moves downward to drive the second sound insulation plate 3096 to move downward, and when the second sound insulation plate 3096 moves downward and is pressed against the ground, the second sound insulation plate 3096 presses the spring 3094 to move upward in the sliding rail 3092, the second sound insulation plate 3096 moves upward to push the push rod 3093 to move, and the push rod 3093 moves to push the first sound insulation plate 3091 to rotate.

[0071] As shown in the accompanying drawings: Figure 5 , Figure 8 ,

[0072] The backfill soil is easy to compact, and therefore a pulverizer 302 is installed on the inner wall of the sliding pipe 203, the pulverizer 302 is used to pulverize large soil blocks, and the pulverizer 302 is vertically located directly above the drill bit 301, a belt 306 is rotatably connected to the outer wall of the power rod 302 and the outer wall of the rotating rod 305, the belt 306 is used to drive the pulverizer 302 to rotate and pulverize, so that the rotating rod 305 rotates to drive the belt 306 to rotate, and then the belt 306 drives the pulverizer 302 to rotate, so that the large soil blocks are pulverized when passing through the sliding pipe 203.

[0073] As shown in the accompanying drawings: Figure 9 , Figure 10 ,

[0074] The filter plate adopts a three-section design, including an anti-blocking section 409, a filter hole section 408, and a cavity protection section 411. The anti-blocking section 409 is located in the upper middle portion of the filter plate and features a smooth curved surface, shielding the water outlet of the nozzle 407. The filter hole section 408, located in the central region, has several evenly distributed circular or strip-shaped filter holes for filtering large particles (such as stones and concrete debris) from the soil. The cavity protection section 411, located in the outer ring, covers the connection between the sliding rod 403 and the filter plate, forming a physical barrier to prevent dust from entering. The filter plate is positioned above the crusher 302 and within the pipeline 202, and is fixedly connected to the sliding tube 203.

[0075] The filter plate body is made of wear-resistant stainless steel or high-strength engineering plastic (such as polyurethane) with good impact resistance; the edges of the filter holes are chamfered to reduce the risk of jamming; the surface of the anti-blocking section 409 can be sprayed with a hydrophobic coating to enhance self-cleaning ability.

[0076] Nozzle 407 sprays high-pressure water to backwash the filter plate surface. It's located directly above the filter plate anti-clogging section 409 and connects to the liquid outlet pipe 406 via a threaded or quick-connect connector. Made of 304 stainless steel or corrosion-resistant ABS plastic, the nozzle's inner surface is polished to minimize clogging.

[0077] Cavity 401 serves as both a water storage chamber and a hydraulic cylinder, storing and pressurizing liquid. Cavity 401 is embedded in the inner wall of pipe 202, perpendicular to the filter plate. The inner wall of cavity 401 is precisely machined to ensure a smooth and tight sliding seal for piston 404.

[0078] Cavity 401 is equipped with an inlet pipe 405 and an outlet pipe 406. Inlet pipe 405 is connected to an external water source (such as a water tank or municipal water supply connection) and has a one-way valve at its entrance, limiting water flow into cavity 401. Outlet pipe 406 connects cavity 401 to nozzle 407 and has a one-way valve at its end to prevent backflow. The one-way valve is spring-loaded or diaphragm-type, offering high sensitivity and strong stain resistance. Inlet and outlet pipes 405 and 406 are constructed using either PVC hoses or stainless steel pipes, with flexible or rigid connections chosen depending on the environment.

[0079] Piston 404 slides up and down within cavity 401, achieving liquid intake and pressurized output. Piston 404 is constructed of stainless steel and silicone rubber seals, ensuring tightness and durability. Limit block 402 is located within cavity 401 to limit the travel of the filter plate.

[0080] Sliding rod 403 connects the filter plate and piston 404, transmitting displacement force. The lower end of sliding rod 403 is welded or bolted to the bottom of the filter plate; the upper end is connected to the top of piston 404 via a joint bearing, allowing slight deflection to adapt to the movement trajectory. Sliding rod 403 is made of chrome-plated carbon steel or stainless steel, with a smooth surface to reduce friction. A second spring 410 is fixedly connected to cavity 401 at one end and to piston 404 at the other end, providing a reset effect.

[0081] During specific operation, the negative pressure machine 201 of this scheme adopts an intermittent operation mode. When the control system issues a start command, the negative pressure machine 201 starts to run, and negative pressure is formed inside the pipeline 202. The filter plate moves upward due to suction, and the filter plate drives the sliding rod 403 to move upward together, pushing the piston 404 to compress the volume of the cavity 401; the pressure in the cavity 401 increases, and the one-way valve of the liquid outlet pipe 406 is opened, and water is squeezed to the nozzle 407, and the nozzle 407 sprays water to backwash the filter plate and reduce dust at the same time.

[0082] When the filter plate reaches the limit block 402 under suction, the anti-blocking section 409 covers the water outlet of the nozzle 407 to prevent mud from entering; the cavity protection section 411 covers the connection part of the sliding rod 403 to prevent dust from entering.

[0083] When the negative pressure machine 201 stops, the control system turns off the power supply to the negative pressure machine 201. The filter plate falls due to gravity and the second spring 410, and the sliding rod 403 drops accordingly. The piston 404 moves downward, the volume of the cavity 401 increases, and negative pressure is generated. The one-way valve of the liquid inlet pipe 405 opens, and the cavity 401 draws clean water from the water source. At the same time, the anti-blocking section 409 moves away from the nozzle 407. The cavity protection section 411 also moves downward synchronously, releasing the connection area of ​​the sliding rod 403. The nozzle 407 is now in the open state, ready for the next water spraying operation. When the negative pressure machine 201 is started again, the nozzle 407 immediately sprays water. The water flow directly impacts the surface of the filter plate, removing attached dirt and debris, achieving a closed-loop operation of "each negative pressure operation = each automatic cleaning". The filter plate always remains unobstructed, improving crushing efficiency and conveying stability.

[0084] The above are only embodiments of the present invention. Common knowledge such as the specific structure and characteristics of the scheme is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be considered as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A trench excavation device for municipal engineering, comprising: Excavation assembly (300): used for excavating trenches; Conveying mechanism (200): used for conveying soil; Moving mechanism (100): used for moving the conveying mechanism (200) and the excavating mechanism; It is characterized in that The conveying mechanism (200) comprises a negative pressure machine (201) and a pipeline (202). The negative pressure machine (201) is fixedly connected to the moving mechanism (100). One end of the pipeline (202) is connected to the negative pressure machine (201), and the other end wraps around the excavation assembly (300).

2. A municipal engineering trench excavation device according to claim 1, characterized in that: It also includes a sliding pipe (203) which is slidably connected to the pipeline (202), and the diameter of the sliding pipe (203) is larger than that of the pipeline (202). The excavation assembly (300) is fixedly connected to the sliding pipe (203).

3. A municipal engineering trench excavation device according to claim 1, characterized in that: The moving mechanism (100) comprises a truck (101) and a storage box (102), wherein the truck (101) is used for movement, the storage box (102) is used for storing soil, and the negative pressure machine (201) is arranged in the storage box (102).

4. A municipal engineering trench excavation device according to claim 1, characterized in that: The invention also comprises a crusher (302) for crushing soil. The crusher (302) is located above the drill bit (301) and inside the sliding tube (203).

5. A municipal engineering trench excavation device according to claim 2, characterized in that: The excavation mechanism comprises a drill bit (301), a motor (304) and a transmission mechanism, wherein the motor (304) is fixedly connected to the sliding tube (203), the motor (304) is connected to the drill bit (301) through the transmission mechanism, and the drill bit (301) is matched with the sliding tube (203).

6. A municipal engineering trench excavation device according to claim 4, characterized in that: The transmission mechanism includes a first bevel gear (307) and a second bevel gear (308), wherein the first bevel gear (307) is fixedly connected to the shaft of the motor (304), and the second bevel gear (308) is fixedly connected to the drill bit (301), and the first bevel gear (307) and the second bevel gear (308) are meshed.

7. A municipal engineering trench excavation device according to claim 2, characterized in that: The device further comprises a sound insulation component (309), wherein the sound insulation component (309) comprises a first sound insulation board (3091) and a second sound insulation board (3096), wherein the first sound insulation board (3091) is rotationally connected to the sliding tube (203), and the second sound insulation board (3096) is slidingly connected to the first sound insulation board (3091).

8. A municipal engineering trench excavation device according to claim 4, characterized in that: The device also includes a filter plate, which is used to filter out large-particle stones. The filter plate is located above the crusher (302).

9. A municipal engineering trench excavation device according to claim 8, characterized in that: The cleaning device further comprises a cleaning mechanism, the cleaning mechanism comprising a nozzle (407), a cavity (401), a piston (404) and a sliding rod (403), the cavity (401) being arranged inside the pipe (202), the cavity (401) being provided with a liquid inlet pipe (405) and a liquid outlet pipe (406), the liquid inlet pipe (405) being used to connect to a water source, and the liquid inlet pipe (405) and the liquid outlet pipe (406) being provided with a one-way valve; The piston (404) is connected to the cavity (401) in a sliding and sealing manner. One end of the sliding rod (403) is fixedly connected to the filter plate, and the other end is fixedly connected to the piston (404). The liquid outlet pipe (406) is connected to the nozzle (407), and the nozzle (407) cooperates with the filter plate.

10. A municipal engineering trench excavation device according to claim 9, characterized in that: The filter plate comprises an anti-blocking section (409), a filter hole section (408) and a cavity protection section (411); the anti-blocking section (409) cooperates with the water outlet of the nozzle (407); the filter hole section (408) cooperates with the pipeline (202); and the cavity protection section (411) cooperates with the cavity (401).

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